1 /*
   2  * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
  26 #define SHARE_VM_RUNTIME_GLOBALS_HPP
  27 
  28 #include "utilities/debug.hpp"
  29 
  30 // use this for flags that are true per default in the tiered build
  31 // but false in non-tiered builds, and vice versa
  32 #ifdef TIERED
  33 #define  trueInTiered true
  34 #define falseInTiered false
  35 #else
  36 #define  trueInTiered false
  37 #define falseInTiered true
  38 #endif
  39 
  40 #ifdef TARGET_ARCH_x86
  41 # include "globals_x86.hpp"
  42 #endif
  43 #ifdef TARGET_ARCH_sparc
  44 # include "globals_sparc.hpp"
  45 #endif
  46 #ifdef TARGET_ARCH_zero
  47 # include "globals_zero.hpp"
  48 #endif
  49 #ifdef TARGET_ARCH_arm
  50 # include "globals_arm.hpp"
  51 #endif
  52 #ifdef TARGET_ARCH_ppc
  53 # include "globals_ppc.hpp"
  54 #endif
  55 #ifdef TARGET_OS_FAMILY_linux
  56 # include "globals_linux.hpp"
  57 #endif
  58 #ifdef TARGET_OS_FAMILY_solaris
  59 # include "globals_solaris.hpp"
  60 #endif
  61 #ifdef TARGET_OS_FAMILY_windows
  62 # include "globals_windows.hpp"
  63 #endif
  64 #ifdef TARGET_OS_FAMILY_aix
  65 # include "globals_aix.hpp"
  66 #endif
  67 #ifdef TARGET_OS_FAMILY_bsd
  68 # include "globals_bsd.hpp"
  69 #endif
  70 #ifdef TARGET_OS_ARCH_linux_x86
  71 # include "globals_linux_x86.hpp"
  72 #endif
  73 #ifdef TARGET_OS_ARCH_linux_sparc
  74 # include "globals_linux_sparc.hpp"
  75 #endif
  76 #ifdef TARGET_OS_ARCH_linux_zero
  77 # include "globals_linux_zero.hpp"
  78 #endif
  79 #ifdef TARGET_OS_ARCH_solaris_x86
  80 # include "globals_solaris_x86.hpp"
  81 #endif
  82 #ifdef TARGET_OS_ARCH_solaris_sparc
  83 # include "globals_solaris_sparc.hpp"
  84 #endif
  85 #ifdef TARGET_OS_ARCH_windows_x86
  86 # include "globals_windows_x86.hpp"
  87 #endif
  88 #ifdef TARGET_OS_ARCH_linux_arm
  89 # include "globals_linux_arm.hpp"
  90 #endif
  91 #ifdef TARGET_OS_ARCH_linux_ppc
  92 # include "globals_linux_ppc.hpp"
  93 #endif
  94 #ifdef TARGET_OS_ARCH_aix_ppc
  95 # include "globals_aix_ppc.hpp"
  96 #endif
  97 #ifdef TARGET_OS_ARCH_bsd_x86
  98 # include "globals_bsd_x86.hpp"
  99 #endif
 100 #ifdef TARGET_OS_ARCH_bsd_zero
 101 # include "globals_bsd_zero.hpp"
 102 #endif
 103 #ifdef COMPILER1
 104 #ifdef TARGET_ARCH_x86
 105 # include "c1_globals_x86.hpp"
 106 #endif
 107 #ifdef TARGET_ARCH_sparc
 108 # include "c1_globals_sparc.hpp"
 109 #endif
 110 #ifdef TARGET_ARCH_arm
 111 # include "c1_globals_arm.hpp"
 112 #endif
 113 #ifdef TARGET_ARCH_ppc
 114 # include "c1_globals_ppc.hpp"
 115 #endif
 116 #ifdef TARGET_OS_FAMILY_linux
 117 # include "c1_globals_linux.hpp"
 118 #endif
 119 #ifdef TARGET_OS_FAMILY_solaris
 120 # include "c1_globals_solaris.hpp"
 121 #endif
 122 #ifdef TARGET_OS_FAMILY_windows
 123 # include "c1_globals_windows.hpp"
 124 #endif
 125 #ifdef TARGET_OS_FAMILY_aix
 126 # include "c1_globals_aix.hpp"
 127 #endif
 128 #ifdef TARGET_OS_FAMILY_bsd
 129 # include "c1_globals_bsd.hpp"
 130 #endif
 131 #endif
 132 #ifdef COMPILER2
 133 #ifdef TARGET_ARCH_x86
 134 # include "c2_globals_x86.hpp"
 135 #endif
 136 #ifdef TARGET_ARCH_sparc
 137 # include "c2_globals_sparc.hpp"
 138 #endif
 139 #ifdef TARGET_ARCH_arm
 140 # include "c2_globals_arm.hpp"
 141 #endif
 142 #ifdef TARGET_ARCH_ppc
 143 # include "c2_globals_ppc.hpp"
 144 #endif
 145 #ifdef TARGET_OS_FAMILY_linux
 146 # include "c2_globals_linux.hpp"
 147 #endif
 148 #ifdef TARGET_OS_FAMILY_solaris
 149 # include "c2_globals_solaris.hpp"
 150 #endif
 151 #ifdef TARGET_OS_FAMILY_windows
 152 # include "c2_globals_windows.hpp"
 153 #endif
 154 #ifdef TARGET_OS_FAMILY_aix
 155 # include "c2_globals_aix.hpp"
 156 #endif
 157 #ifdef TARGET_OS_FAMILY_bsd
 158 # include "c2_globals_bsd.hpp"
 159 #endif
 160 #endif
 161 #ifdef SHARK
 162 #ifdef TARGET_ARCH_zero
 163 # include "shark_globals_zero.hpp"
 164 #endif
 165 #endif
 166 
 167 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
 168 define_pd_global(bool, BackgroundCompilation,        false);
 169 define_pd_global(bool, UseTLAB,                      false);
 170 define_pd_global(bool, CICompileOSR,                 false);
 171 define_pd_global(bool, UseTypeProfile,               false);
 172 define_pd_global(bool, UseOnStackReplacement,        false);
 173 define_pd_global(bool, InlineIntrinsics,             false);
 174 define_pd_global(bool, PreferInterpreterNativeStubs, true);
 175 define_pd_global(bool, ProfileInterpreter,           false);
 176 define_pd_global(bool, ProfileTraps,                 false);
 177 define_pd_global(bool, TieredCompilation,            false);
 178 
 179 define_pd_global(intx, CompileThreshold,             0);
 180 define_pd_global(intx, BackEdgeThreshold,            0);
 181 
 182 define_pd_global(intx, OnStackReplacePercentage,     0);
 183 define_pd_global(bool, ResizeTLAB,                   false);
 184 define_pd_global(intx, FreqInlineSize,               0);
 185 define_pd_global(intx, NewSizeThreadIncrease,        4*K);
 186 define_pd_global(intx, InlineClassNatives,           true);
 187 define_pd_global(intx, InlineUnsafeOps,              true);
 188 define_pd_global(intx, InitialCodeCacheSize,         160*K);
 189 define_pd_global(intx, ReservedCodeCacheSize,        32*M);
 190 define_pd_global(intx, CodeCacheExpansionSize,       32*K);
 191 define_pd_global(intx, CodeCacheMinBlockLength,      1);
 192 define_pd_global(intx, CodeCacheMinimumUseSpace,     200*K);
 193 define_pd_global(uintx,MetaspaceSize,    ScaleForWordSize(4*M));
 194 define_pd_global(bool, NeverActAsServerClassMachine, true);
 195 define_pd_global(uint64_t,MaxRAM,                    1ULL*G);
 196 #define CI_COMPILER_COUNT 0
 197 #else
 198 
 199 #ifdef COMPILER2
 200 #define CI_COMPILER_COUNT 2
 201 #else
 202 #define CI_COMPILER_COUNT 1
 203 #endif // COMPILER2
 204 
 205 #endif // no compilers
 206 
 207 // string type aliases used only in this file
 208 typedef const char* ccstr;
 209 typedef const char* ccstrlist;   // represents string arguments which accumulate
 210 
 211 struct Flag {
 212   enum Flags {
 213     // value origin
 214     DEFAULT          = 0,
 215     COMMAND_LINE     = 1,
 216     ENVIRON_VAR      = 2,
 217     CONFIG_FILE      = 3,
 218     MANAGEMENT       = 4,
 219     ERGONOMIC        = 5,
 220     ATTACH_ON_DEMAND = 6,
 221     INTERNAL         = 7,
 222 
 223     LAST_VALUE_ORIGIN = INTERNAL,
 224     VALUE_ORIGIN_BITS = 4,
 225     VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
 226 
 227     // flag kind
 228     KIND_PRODUCT            = 1 << 4,
 229     KIND_MANAGEABLE         = 1 << 5,
 230     KIND_DIAGNOSTIC         = 1 << 6,
 231     KIND_EXPERIMENTAL       = 1 << 7,
 232     KIND_NOT_PRODUCT        = 1 << 8,
 233     KIND_DEVELOP            = 1 << 9,
 234     KIND_PLATFORM_DEPENDENT = 1 << 10,
 235     KIND_READ_WRITE         = 1 << 11,
 236     KIND_C1                 = 1 << 12,
 237     KIND_C2                 = 1 << 13,
 238     KIND_ARCH               = 1 << 14,
 239     KIND_SHARK              = 1 << 15,
 240     KIND_LP64_PRODUCT       = 1 << 16,
 241     KIND_COMMERCIAL         = 1 << 17,
 242 
 243     KIND_MASK = ~VALUE_ORIGIN_MASK
 244   };
 245 
 246   const char* _type;
 247   const char* _name;
 248   void* _addr;
 249   NOT_PRODUCT(const char* _doc;)
 250   Flags _flags;
 251 
 252   // points to all Flags static array
 253   static Flag* flags;
 254 
 255   // number of flags
 256   static size_t numFlags;
 257 
 258   static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false);
 259   static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
 260 
 261   void check_writable();
 262 
 263   bool is_bool() const;
 264   bool get_bool() const;
 265   void set_bool(bool value);
 266 
 267   bool is_intx() const;
 268   intx get_intx() const;
 269   void set_intx(intx value);
 270 
 271   bool is_uintx() const;
 272   uintx get_uintx() const;
 273   void set_uintx(uintx value);
 274 
 275   bool is_uint64_t() const;
 276   uint64_t get_uint64_t() const;
 277   void set_uint64_t(uint64_t value);
 278 
 279   bool is_double() const;
 280   double get_double() const;
 281   void set_double(double value);
 282 
 283   bool is_ccstr() const;
 284   bool ccstr_accumulates() const;
 285   ccstr get_ccstr() const;
 286   void set_ccstr(ccstr value);
 287 
 288   Flags get_origin();
 289   void set_origin(Flags origin);
 290 
 291   bool is_default();
 292   bool is_ergonomic();
 293   bool is_command_line();
 294 
 295   bool is_product() const;
 296   bool is_manageable() const;
 297   bool is_diagnostic() const;
 298   bool is_experimental() const;
 299   bool is_notproduct() const;
 300   bool is_develop() const;
 301   bool is_read_write() const;
 302   bool is_commercial() const;
 303 
 304   bool is_constant_in_binary() const;
 305 
 306   bool is_unlocker() const;
 307   bool is_unlocked() const;
 308   bool is_writeable() const;
 309   bool is_external() const;
 310 
 311   bool is_unlocker_ext() const;
 312   bool is_unlocked_ext() const;
 313   bool is_writeable_ext() const;
 314   bool is_external_ext() const;
 315 
 316   void unlock_diagnostic();
 317 
 318   void get_locked_message(char*, int) const;
 319   void get_locked_message_ext(char*, int) const;
 320 
 321   void print_on(outputStream* st, bool withComments = false );
 322   void print_kind(outputStream* st);
 323   void print_as_flag(outputStream* st);
 324 };
 325 
 326 // debug flags control various aspects of the VM and are global accessible
 327 
 328 // use FlagSetting to temporarily change some debug flag
 329 // e.g. FlagSetting fs(DebugThisAndThat, true);
 330 // restored to previous value upon leaving scope
 331 class FlagSetting {
 332   bool val;
 333   bool* flag;
 334  public:
 335   FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
 336   ~FlagSetting()                       { *flag = val; }
 337 };
 338 
 339 
 340 class CounterSetting {
 341   intx* counter;
 342  public:
 343   CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
 344   ~CounterSetting()         { (*counter)--; }
 345 };
 346 
 347 
 348 class UIntFlagSetting {
 349   uintx val;
 350   uintx* flag;
 351  public:
 352   UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
 353   ~UIntFlagSetting()                         { *flag = val; }
 354 };
 355 
 356 
 357 class DoubleFlagSetting {
 358   double val;
 359   double* flag;
 360  public:
 361   DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
 362   ~DoubleFlagSetting()                           { *flag = val; }
 363 };
 364 
 365 
 366 class CommandLineFlags {
 367  public:
 368   static bool boolAt(const char* name, size_t len, bool* value);
 369   static bool boolAt(const char* name, bool* value)      { return boolAt(name, strlen(name), value); }
 370   static bool boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin);
 371   static bool boolAtPut(const char* name, bool* value, Flag::Flags origin)   { return boolAtPut(name, strlen(name), value, origin); }
 372 
 373   static bool intxAt(const char* name, size_t len, intx* value);
 374   static bool intxAt(const char* name, intx* value)      { return intxAt(name, strlen(name), value); }
 375   static bool intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin);
 376   static bool intxAtPut(const char* name, intx* value, Flag::Flags origin)   { return intxAtPut(name, strlen(name), value, origin); }
 377 
 378   static bool uintxAt(const char* name, size_t len, uintx* value);
 379   static bool uintxAt(const char* name, uintx* value)    { return uintxAt(name, strlen(name), value); }
 380   static bool uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin);
 381   static bool uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
 382 
 383   static bool uint64_tAt(const char* name, size_t len, uint64_t* value);
 384   static bool uint64_tAt(const char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
 385   static bool uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin);
 386   static bool uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
 387 
 388   static bool doubleAt(const char* name, size_t len, double* value);
 389   static bool doubleAt(const char* name, double* value)    { return doubleAt(name, strlen(name), value); }
 390   static bool doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin);
 391   static bool doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
 392 
 393   static bool ccstrAt(const char* name, size_t len, ccstr* value);
 394   static bool ccstrAt(const char* name, ccstr* value)    { return ccstrAt(name, strlen(name), value); }
 395   // Contract:  Flag will make private copy of the incoming value.
 396   // Outgoing value is always malloc-ed, and caller MUST call free.
 397   static bool ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin);
 398   static bool ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
 399 
 400   // Returns false if name is not a command line flag.
 401   static bool wasSetOnCmdline(const char* name, bool* value);
 402   static void printSetFlags(outputStream* out);
 403 
 404   static void printFlags(outputStream* out, bool withComments);
 405 
 406   static void verify() PRODUCT_RETURN;
 407 };
 408 
 409 // use this for flags that are true by default in the debug version but
 410 // false in the optimized version, and vice versa
 411 #ifdef ASSERT
 412 #define trueInDebug  true
 413 #define falseInDebug false
 414 #else
 415 #define trueInDebug  false
 416 #define falseInDebug true
 417 #endif
 418 
 419 // use this for flags that are true per default in the product build
 420 // but false in development builds, and vice versa
 421 #ifdef PRODUCT
 422 #define trueInProduct  true
 423 #define falseInProduct false
 424 #else
 425 #define trueInProduct  false
 426 #define falseInProduct true
 427 #endif
 428 
 429 #ifdef JAVASE_EMBEDDED
 430 #define falseInEmbedded false
 431 #else
 432 #define falseInEmbedded true
 433 #endif
 434 
 435 // develop flags are settable / visible only during development and are constant in the PRODUCT version
 436 // product flags are always settable / visible
 437 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
 438 
 439 // A flag must be declared with one of the following types:
 440 // bool, intx, uintx, ccstr.
 441 // The type "ccstr" is an alias for "const char*" and is used
 442 // only in this file, because the macrology requires single-token type names.
 443 
 444 // Note: Diagnostic options not meant for VM tuning or for product modes.
 445 // They are to be used for VM quality assurance or field diagnosis
 446 // of VM bugs.  They are hidden so that users will not be encouraged to
 447 // try them as if they were VM ordinary execution options.  However, they
 448 // are available in the product version of the VM.  Under instruction
 449 // from support engineers, VM customers can turn them on to collect
 450 // diagnostic information about VM problems.  To use a VM diagnostic
 451 // option, you must first specify +UnlockDiagnosticVMOptions.
 452 // (This master switch also affects the behavior of -Xprintflags.)
 453 //
 454 // experimental flags are in support of features that are not
 455 //    part of the officially supported product, but are available
 456 //    for experimenting with. They could, for example, be performance
 457 //    features that may not have undergone full or rigorous QA, but which may
 458 //    help performance in some cases and released for experimentation
 459 //    by the community of users and developers. This flag also allows one to
 460 //    be able to build a fully supported product that nonetheless also
 461 //    ships with some unsupported, lightly tested, experimental features.
 462 //    Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
 463 //    UnlockExperimentalVMOptions flag, which allows the control and
 464 //    modification of the experimental flags.
 465 //
 466 // Nota bene: neither diagnostic nor experimental options should be used casually,
 467 //    and they are not supported on production loads, except under explicit
 468 //    direction from support engineers.
 469 //
 470 // manageable flags are writeable external product flags.
 471 //    They are dynamically writeable through the JDK management interface
 472 //    (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
 473 //    These flags are external exported interface (see CCC).  The list of
 474 //    manageable flags can be queried programmatically through the management
 475 //    interface.
 476 //
 477 //    A flag can be made as "manageable" only if
 478 //    - the flag is defined in a CCC as an external exported interface.
 479 //    - the VM implementation supports dynamic setting of the flag.
 480 //      This implies that the VM must *always* query the flag variable
 481 //      and not reuse state related to the flag state at any given time.
 482 //    - you want the flag to be queried programmatically by the customers.
 483 //
 484 // product_rw flags are writeable internal product flags.
 485 //    They are like "manageable" flags but for internal/private use.
 486 //    The list of product_rw flags are internal/private flags which
 487 //    may be changed/removed in a future release.  It can be set
 488 //    through the management interface to get/set value
 489 //    when the name of flag is supplied.
 490 //
 491 //    A flag can be made as "product_rw" only if
 492 //    - the VM implementation supports dynamic setting of the flag.
 493 //      This implies that the VM must *always* query the flag variable
 494 //      and not reuse state related to the flag state at any given time.
 495 //
 496 // Note that when there is a need to support develop flags to be writeable,
 497 // it can be done in the same way as product_rw.
 498 
 499 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
 500                                                                             \
 501   lp64_product(bool, UseCompressedOops, false,                              \
 502           "Use 32-bit object references in 64-bit VM. "                     \
 503           "lp64_product means flag is always constant in 32 bit VM")        \
 504                                                                             \
 505   lp64_product(bool, UseCompressedClassPointers, false,                     \
 506           "Use 32-bit class pointers in 64-bit VM. "                        \
 507           "lp64_product means flag is always constant in 32 bit VM")        \
 508                                                                             \
 509   notproduct(bool, CheckCompressedOops, true,                               \
 510           "Generate checks in encoding/decoding code in debug VM")          \
 511                                                                             \
 512   product_pd(uintx, HeapBaseMinAddress,                                     \
 513           "OS specific low limit for heap base address")                    \
 514                                                                             \
 515   diagnostic(bool, PrintCompressedOopsMode, false,                          \
 516           "Print compressed oops base address and encoding mode")           \
 517                                                                             \
 518   lp64_product(intx, ObjectAlignmentInBytes, 8,                             \
 519           "Default object alignment in bytes, 8 is minimum")                \
 520                                                                             \
 521   product(bool, AssumeMP, false,                                            \
 522           "Instruct the VM to assume multiple processors are available")    \
 523                                                                             \
 524   /* UseMembar is theoretically a temp flag used for memory barrier         \
 525    * removal testing.  It was supposed to be removed before FCS but has     \
 526    * been re-added (see 6401008) */                                         \
 527   product_pd(bool, UseMembar,                                               \
 528           "(Unstable) Issues membars on thread state transitions")          \
 529                                                                             \
 530   develop(bool, CleanChunkPoolAsync, falseInEmbedded,                       \
 531           "Clean the chunk pool asynchronously")                            \
 532                                                                             \
 533   /* Temporary: See 6948537 */                                              \
 534   experimental(bool, UseMemSetInBOT, true,                                  \
 535           "(Unstable) uses memset in BOT updates in GC code")               \
 536                                                                             \
 537   diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug,                  \
 538           "Enable normal processing of flags relating to field diagnostics")\
 539                                                                             \
 540   experimental(bool, UnlockExperimentalVMOptions, false,                    \
 541           "Enable normal processing of flags relating to experimental "     \
 542           "features")                                                       \
 543                                                                             \
 544   product(bool, JavaMonitorsInStackTrace, true,                             \
 545           "Print information about Java monitor locks when the stacks are"  \
 546           "dumped")                                                         \
 547                                                                             \
 548   product_pd(bool, UseLargePages,                                           \
 549           "Use large page memory")                                          \
 550                                                                             \
 551   product_pd(bool, UseLargePagesIndividualAllocation,                       \
 552           "Allocate large pages individually for better affinity")          \
 553                                                                             \
 554   develop(bool, LargePagesIndividualAllocationInjectError, false,           \
 555           "Fail large pages individual allocation")                         \
 556                                                                             \
 557   product(bool, UseLargePagesInMetaspace, false,                            \
 558           "Use large page memory in metaspace. "                            \
 559           "Only used if UseLargePages is enabled.")                         \
 560                                                                             \
 561   develop(bool, TracePageSizes, false,                                      \
 562           "Trace page size selection and usage")                            \
 563                                                                             \
 564   product(bool, UseNUMA, false,                                             \
 565           "Use NUMA if available")                                          \
 566                                                                             \
 567   product(bool, UseNUMAInterleaving, false,                                 \
 568           "Interleave memory across NUMA nodes if available")               \
 569                                                                             \
 570   product(uintx, NUMAInterleaveGranularity, 2*M,                            \
 571           "Granularity to use for NUMA interleaving on Windows OS")         \
 572                                                                             \
 573   product(bool, ForceNUMA, false,                                           \
 574           "Force NUMA optimizations on single-node/UMA systems")            \
 575                                                                             \
 576   product(uintx, NUMAChunkResizeWeight, 20,                                 \
 577           "Percentage (0-100) used to weigh the current sample when "       \
 578           "computing exponentially decaying average for "                   \
 579           "AdaptiveNUMAChunkSizing")                                        \
 580                                                                             \
 581   product(uintx, NUMASpaceResizeRate, 1*G,                                  \
 582           "Do not reallocate more than this amount per collection")         \
 583                                                                             \
 584   product(bool, UseAdaptiveNUMAChunkSizing, true,                           \
 585           "Enable adaptive chunk sizing for NUMA")                          \
 586                                                                             \
 587   product(bool, NUMAStats, false,                                           \
 588           "Print NUMA stats in detailed heap information")                  \
 589                                                                             \
 590   product(uintx, NUMAPageScanRate, 256,                                     \
 591           "Maximum number of pages to include in the page scan procedure")  \
 592                                                                             \
 593   product_pd(bool, NeedsDeoptSuspend,                                       \
 594           "True for register window machines (sparc/ia64)")                 \
 595                                                                             \
 596   product(intx, UseSSE, 99,                                                 \
 597           "Highest supported SSE instructions set on x86/x64")              \
 598                                                                             \
 599   product(bool, UseAES, false,                                              \
 600           "Control whether AES instructions can be used on x86/x64")        \
 601                                                                             \
 602   product(bool, UseSHA, false,                                              \
 603           "Control whether SHA instructions can be used on SPARC")          \
 604                                                                             \
 605   product(uintx, LargePageSizeInBytes, 0,                                   \
 606           "Large page size (0 to let VM choose the page size)")             \
 607                                                                             \
 608   product(uintx, LargePageHeapSizeThreshold, 128*M,                         \
 609           "Use large pages if maximum heap is at least this big")           \
 610                                                                             \
 611   product(bool, ForceTimeHighResolution, false,                             \
 612           "Using high time resolution (for Win32 only)")                    \
 613                                                                             \
 614   develop(bool, TraceItables, false,                                        \
 615           "Trace initialization and use of itables")                        \
 616                                                                             \
 617   develop(bool, TracePcPatching, false,                                     \
 618           "Trace usage of frame::patch_pc")                                 \
 619                                                                             \
 620   develop(bool, TraceJumps, false,                                          \
 621           "Trace assembly jumps in thread ring buffer")                     \
 622                                                                             \
 623   develop(bool, TraceRelocator, false,                                      \
 624           "Trace the bytecode relocator")                                   \
 625                                                                             \
 626   develop(bool, TraceLongCompiles, false,                                   \
 627           "Print out every time compilation is longer than "                \
 628           "a given threshold")                                              \
 629                                                                             \
 630   develop(bool, SafepointALot, false,                                       \
 631           "Generate a lot of safepoints. This works with "                  \
 632           "GuaranteedSafepointInterval")                                    \
 633                                                                             \
 634   product_pd(bool, BackgroundCompilation,                                   \
 635           "A thread requesting compilation is not blocked during "          \
 636           "compilation")                                                    \
 637                                                                             \
 638   product(bool, PrintVMQWaitTime, false,                                    \
 639           "Print out the waiting time in VM operation queue")               \
 640                                                                             \
 641   develop(bool, NoYieldsInMicrolock, false,                                 \
 642           "Disable yields in microlock")                                    \
 643                                                                             \
 644   develop(bool, TraceOopMapGeneration, false,                               \
 645           "Show OopMapGeneration")                                          \
 646                                                                             \
 647   product(bool, MethodFlushing, true,                                       \
 648           "Reclamation of zombie and not-entrant methods")                  \
 649                                                                             \
 650   develop(bool, VerifyStack, false,                                         \
 651           "Verify stack of each thread when it is entering a runtime call") \
 652                                                                             \
 653   diagnostic(bool, ForceUnreachable, false,                                 \
 654           "Make all non code cache addresses to be unreachable by "         \
 655           "forcing use of 64bit literal fixups")                            \
 656                                                                             \
 657   notproduct(bool, StressDerivedPointers, false,                            \
 658           "Force scavenge when a derived pointer is detected on stack "     \
 659           "after rtm call")                                                 \
 660                                                                             \
 661   develop(bool, TraceDerivedPointers, false,                                \
 662           "Trace traversal of derived pointers on stack")                   \
 663                                                                             \
 664   notproduct(bool, TraceCodeBlobStacks, false,                              \
 665           "Trace stack-walk of codeblobs")                                  \
 666                                                                             \
 667   product(bool, PrintJNIResolving, false,                                   \
 668           "Used to implement -v:jni")                                       \
 669                                                                             \
 670   notproduct(bool, PrintRewrites, false,                                    \
 671           "Print methods that are being rewritten")                         \
 672                                                                             \
 673   product(bool, UseInlineCaches, true,                                      \
 674           "Use Inline Caches for virtual calls ")                           \
 675                                                                             \
 676   develop(bool, InlineArrayCopy, true,                                      \
 677           "Inline arraycopy native that is known to be part of "            \
 678           "base library DLL")                                               \
 679                                                                             \
 680   develop(bool, InlineObjectHash, true,                                     \
 681           "Inline Object::hashCode() native that is known to be part "      \
 682           "of base library DLL")                                            \
 683                                                                             \
 684   develop(bool, InlineNatives, true,                                        \
 685           "Inline natives that are known to be part of base library DLL")   \
 686                                                                             \
 687   develop(bool, InlineMathNatives, true,                                    \
 688           "Inline SinD, CosD, etc.")                                        \
 689                                                                             \
 690   develop(bool, InlineClassNatives, true,                                   \
 691           "Inline Class.isInstance, etc")                                   \
 692                                                                             \
 693   develop(bool, InlineThreadNatives, true,                                  \
 694           "Inline Thread.currentThread, etc")                               \
 695                                                                             \
 696   develop(bool, InlineUnsafeOps, true,                                      \
 697           "Inline memory ops (native methods) from sun.misc.Unsafe")        \
 698                                                                             \
 699   product(bool, CriticalJNINatives, true,                                   \
 700           "Check for critical JNI entry points")                            \
 701                                                                             \
 702   notproduct(bool, StressCriticalJNINatives, false,                         \
 703           "Exercise register saving code in critical natives")              \
 704                                                                             \
 705   product(bool, UseSSE42Intrinsics, false,                                  \
 706           "SSE4.2 versions of intrinsics")                                  \
 707                                                                             \
 708   product(bool, UseAESIntrinsics, false,                                    \
 709           "Use intrinsics for AES versions of crypto")                      \
 710                                                                             \
 711   product(bool, UseSHA1Intrinsics, false,                                   \
 712           "Use intrinsics for SHA-1 crypto hash function")                  \
 713                                                                             \
 714   product(bool, UseSHA256Intrinsics, false,                                 \
 715           "Use intrinsics for SHA-224 and SHA-256 crypto hash functions")   \
 716                                                                             \
 717   product(bool, UseSHA512Intrinsics, false,                                 \
 718           "Use intrinsics for SHA-384 and SHA-512 crypto hash functions")   \
 719                                                                             \
 720   product(bool, UseCRC32Intrinsics, false,                                  \
 721           "use intrinsics for java.util.zip.CRC32")                         \
 722                                                                             \
 723   develop(bool, TraceCallFixup, false,                                      \
 724           "Trace all call fixups")                                          \
 725                                                                             \
 726   develop(bool, DeoptimizeALot, false,                                      \
 727           "Deoptimize at every exit from the runtime system")               \
 728                                                                             \
 729   notproduct(ccstrlist, DeoptimizeOnlyAt, "",                               \
 730           "A comma separated list of bcis to deoptimize at")                \
 731                                                                             \
 732   product(bool, DeoptimizeRandom, false,                                    \
 733           "Deoptimize random frames on random exit from the runtime system")\
 734                                                                             \
 735   notproduct(bool, ZombieALot, false,                                       \
 736           "Create zombies (non-entrant) at exit from the runtime system")   \
 737                                                                             \
 738   product(bool, UnlinkSymbolsALot, false,                                   \
 739           "Unlink unreferenced symbols from the symbol table at safepoints")\
 740                                                                             \
 741   notproduct(bool, WalkStackALot, false,                                    \
 742           "Trace stack (no print) at every exit from the runtime system")   \
 743                                                                             \
 744   product(bool, Debugging, false,                                           \
 745           "Set when executing debug methods in debug.cpp "                  \
 746           "(to prevent triggering assertions)")                             \
 747                                                                             \
 748   notproduct(bool, StrictSafepointChecks, trueInDebug,                      \
 749           "Enable strict checks that safepoints cannot happen for threads " \
 750           "that use No_Safepoint_Verifier")                                 \
 751                                                                             \
 752   notproduct(bool, VerifyLastFrame, false,                                  \
 753           "Verify oops on last frame on entry to VM")                       \
 754                                                                             \
 755   develop(bool, TraceHandleAllocation, false,                               \
 756           "Print out warnings when suspiciously many handles are allocated")\
 757                                                                             \
 758   product(bool, UseCompilerSafepoints, true,                                \
 759           "Stop at safepoints in compiled code")                            \
 760                                                                             \
 761   product(bool, FailOverToOldVerifier, true,                                \
 762           "Fail over to old verifier when split verifier fails")            \
 763                                                                             \
 764   develop(bool, ShowSafepointMsgs, false,                                   \
 765           "Show message about safepoint synchronization")                   \
 766                                                                             \
 767   product(bool, SafepointTimeout, false,                                    \
 768           "Time out and warn or fail after SafepointTimeoutDelay "          \
 769           "milliseconds if failed to reach safepoint")                      \
 770                                                                             \
 771   develop(bool, DieOnSafepointTimeout, false,                               \
 772           "Die upon failure to reach safepoint (see SafepointTimeout)")     \
 773                                                                             \
 774   /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */      \
 775   /* typically, at most a few retries are needed */                         \
 776   product(intx, SuspendRetryCount, 50,                                      \
 777           "Maximum retry count for an external suspend request")            \
 778                                                                             \
 779   product(intx, SuspendRetryDelay, 5,                                       \
 780           "Milliseconds to delay per retry (* current_retry_count)")        \
 781                                                                             \
 782   product(bool, AssertOnSuspendWaitFailure, false,                          \
 783           "Assert/Guarantee on external suspend wait failure")              \
 784                                                                             \
 785   product(bool, TraceSuspendWaitFailures, false,                            \
 786           "Trace external suspend wait failures")                           \
 787                                                                             \
 788   product(bool, MaxFDLimit, true,                                           \
 789           "Bump the number of file descriptors to maximum in Solaris")      \
 790                                                                             \
 791   diagnostic(bool, LogEvents, true,                                         \
 792           "Enable the various ring buffer event logs")                      \
 793                                                                             \
 794   diagnostic(uintx, LogEventsBufferEntries, 10,                             \
 795           "Number of ring buffer event logs")                               \
 796                                                                             \
 797   product(bool, BytecodeVerificationRemote, true,                           \
 798           "Enable the Java bytecode verifier for remote classes")           \
 799                                                                             \
 800   product(bool, BytecodeVerificationLocal, false,                           \
 801           "Enable the Java bytecode verifier for local classes")            \
 802                                                                             \
 803   develop(bool, ForceFloatExceptions, trueInDebug,                          \
 804           "Force exceptions on FP stack under/overflow")                    \
 805                                                                             \
 806   develop(bool, VerifyStackAtCalls, false,                                  \
 807           "Verify that the stack pointer is unchanged after calls")         \
 808                                                                             \
 809   develop(bool, TraceJavaAssertions, false,                                 \
 810           "Trace java language assertions")                                 \
 811                                                                             \
 812   notproduct(bool, CheckAssertionStatusDirectives, false,                   \
 813           "Temporary - see javaClasses.cpp")                                \
 814                                                                             \
 815   notproduct(bool, PrintMallocFree, false,                                  \
 816           "Trace calls to C heap malloc/free allocation")                   \
 817                                                                             \
 818   product(bool, PrintOopAddress, false,                                     \
 819           "Always print the location of the oop")                           \
 820                                                                             \
 821   notproduct(bool, VerifyCodeCacheOften, false,                             \
 822           "Verify compiled-code cache often")                               \
 823                                                                             \
 824   develop(bool, ZapDeadCompiledLocals, false,                               \
 825           "Zap dead locals in compiler frames")                             \
 826                                                                             \
 827   notproduct(bool, ZapDeadLocalsOld, false,                                 \
 828           "Zap dead locals (old version, zaps all frames when "             \
 829           "entering the VM")                                                \
 830                                                                             \
 831   notproduct(bool, CheckOopishValues, false,                                \
 832           "Warn if value contains oop (requires ZapDeadLocals)")            \
 833                                                                             \
 834   develop(bool, UseMallocOnly, false,                                       \
 835           "Use only malloc/free for allocation (no resource area/arena)")   \
 836                                                                             \
 837   develop(bool, PrintMalloc, false,                                         \
 838           "Print all malloc/free calls")                                    \
 839                                                                             \
 840   develop(bool, PrintMallocStatistics, false,                               \
 841           "Print malloc/free statistics")                                   \
 842                                                                             \
 843   develop(bool, ZapResourceArea, trueInDebug,                               \
 844           "Zap freed resource/arena space with 0xABABABAB")                 \
 845                                                                             \
 846   notproduct(bool, ZapVMHandleArea, trueInDebug,                            \
 847           "Zap freed VM handle space with 0xBCBCBCBC")                      \
 848                                                                             \
 849   develop(bool, ZapJNIHandleArea, trueInDebug,                              \
 850           "Zap freed JNI handle space with 0xFEFEFEFE")                     \
 851                                                                             \
 852   notproduct(bool, ZapStackSegments, trueInDebug,                           \
 853           "Zap allocated/freed stack segments with 0xFADFADED")             \
 854                                                                             \
 855   develop(bool, ZapUnusedHeapArea, trueInDebug,                             \
 856           "Zap unused heap space with 0xBAADBABE")                          \
 857                                                                             \
 858   develop(bool, TraceZapUnusedHeapArea, false,                              \
 859           "Trace zapping of unused heap space")                             \
 860                                                                             \
 861   develop(bool, CheckZapUnusedHeapArea, false,                              \
 862           "Check zapping of unused heap space")                             \
 863                                                                             \
 864   develop(bool, ZapFillerObjects, trueInDebug,                              \
 865           "Zap filler objects with 0xDEAFBABE")                             \
 866                                                                             \
 867   develop(bool, PrintVMMessages, true,                                      \
 868           "Print VM messages on console")                                   \
 869                                                                             \
 870   product(bool, PrintGCApplicationConcurrentTime, false,                    \
 871           "Print the time the application has been running")                \
 872                                                                             \
 873   product(bool, PrintGCApplicationStoppedTime, false,                       \
 874           "Print the time the application has been stopped")                \
 875                                                                             \
 876   diagnostic(bool, VerboseVerification, false,                              \
 877           "Display detailed verification details")                          \
 878                                                                             \
 879   notproduct(uintx, ErrorHandlerTest, 0,                                    \
 880           "If > 0, provokes an error after VM initialization; the value "   \
 881           "determines which error to provoke. See test_error_handler() "    \
 882           "in debug.cpp.")                                                  \
 883                                                                             \
 884   develop(bool, Verbose, false,                                             \
 885           "Print additional debugging information from other modes")        \
 886                                                                             \
 887   develop(bool, PrintMiscellaneous, false,                                  \
 888           "Print uncategorized debugging information (requires +Verbose)")  \
 889                                                                             \
 890   develop(bool, WizardMode, false,                                          \
 891           "Print much more debugging information")                          \
 892                                                                             \
 893   product(bool, ShowMessageBoxOnError, false,                               \
 894           "Keep process alive on VM fatal error")                           \
 895                                                                             \
 896   product(bool, CreateMinidumpOnCrash, false,                               \
 897           "Create minidump on VM fatal error")                              \
 898                                                                             \
 899   product_pd(bool, UseOSErrorReporting,                                     \
 900           "Let VM fatal error propagate to the OS (ie. WER on Windows)")    \
 901                                                                             \
 902   product(bool, SuppressFatalErrorMessage, false,                           \
 903           "Report NO fatal error message (avoid deadlock)")                 \
 904                                                                             \
 905   product(ccstrlist, OnError, "",                                           \
 906           "Run user-defined commands on fatal error; see VMError.cpp "      \
 907           "for examples")                                                   \
 908                                                                             \
 909   product(ccstrlist, OnOutOfMemoryError, "",                                \
 910           "Run user-defined commands on first java.lang.OutOfMemoryError")  \
 911                                                                             \
 912   manageable(bool, HeapDumpBeforeFullGC, false,                             \
 913           "Dump heap to file before any major stop-the-world GC")           \
 914                                                                             \
 915   manageable(bool, HeapDumpAfterFullGC, false,                              \
 916           "Dump heap to file after any major stop-the-world GC")            \
 917                                                                             \
 918   manageable(bool, HeapDumpOnOutOfMemoryError, false,                       \
 919           "Dump heap to file when java.lang.OutOfMemoryError is thrown")    \
 920                                                                             \
 921   manageable(ccstr, HeapDumpPath, NULL,                                     \
 922           "When HeapDumpOnOutOfMemoryError is on, the path (filename or "   \
 923           "directory) of the dump file (defaults to java_pid<pid>.hprof "   \
 924           "in the working directory)")                                      \
 925                                                                             \
 926   develop(uintx, SegmentedHeapDumpThreshold, 2*G,                           \
 927           "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) "     \
 928           "when the heap usage is larger than this")                        \
 929                                                                             \
 930   develop(uintx, HeapDumpSegmentSize, 1*G,                                  \
 931           "Approximate segment size when generating a segmented heap dump") \
 932                                                                             \
 933   develop(bool, BreakAtWarning, false,                                      \
 934           "Execute breakpoint upon encountering VM warning")                \
 935                                                                             \
 936   develop(bool, TraceVMOperation, false,                                    \
 937           "Trace VM operations")                                            \
 938                                                                             \
 939   develop(bool, UseFakeTimers, false,                                       \
 940           "Tell whether the VM should use system time or a fake timer")     \
 941                                                                             \
 942   product(ccstr, NativeMemoryTracking, "off",                               \
 943           "Native memory tracking options")                                 \
 944                                                                             \
 945   diagnostic(bool, PrintNMTStatistics, false,                               \
 946           "Print native memory tracking summary data if it is on")          \
 947                                                                             \
 948   diagnostic(bool, LogCompilation, false,                                   \
 949           "Log compilation activity in detail to LogFile")                  \
 950                                                                             \
 951   product(bool, PrintCompilation, false,                                    \
 952           "Print compilations")                                             \
 953                                                                             \
 954   diagnostic(bool, TraceNMethodInstalls, false,                             \
 955           "Trace nmethod installation")                                     \
 956                                                                             \
 957   diagnostic(intx, ScavengeRootsInCode, 2,                                  \
 958           "0: do not allow scavengable oops in the code cache; "            \
 959           "1: allow scavenging from the code cache; "                       \
 960           "2: emit as many constants as the compiler can see")              \
 961                                                                             \
 962   product(bool, AlwaysRestoreFPU, false,                                    \
 963           "Restore the FPU control word after every JNI call (expensive)")  \
 964                                                                             \
 965   diagnostic(bool, PrintCompilation2, false,                                \
 966           "Print additional statistics per compilation")                    \
 967                                                                             \
 968   diagnostic(bool, PrintAdapterHandlers, false,                             \
 969           "Print code generated for i2c/c2i adapters")                      \
 970                                                                             \
 971   diagnostic(bool, VerifyAdapterCalls, trueInDebug,                         \
 972           "Verify that i2c/c2i adapters are called properly")               \
 973                                                                             \
 974   develop(bool, VerifyAdapterSharing, false,                                \
 975           "Verify that the code for shared adapters is the equivalent")     \
 976                                                                             \
 977   diagnostic(bool, PrintAssembly, false,                                    \
 978           "Print assembly code (using external disassembler.so)")           \
 979                                                                             \
 980   diagnostic(ccstr, PrintAssemblyOptions, NULL,                             \
 981           "Print options string passed to disassembler.so")                 \
 982                                                                             \
 983   diagnostic(bool, PrintNMethods, false,                                    \
 984           "Print assembly code for nmethods when generated")                \
 985                                                                             \
 986   diagnostic(bool, PrintNativeNMethods, false,                              \
 987           "Print assembly code for native nmethods when generated")         \
 988                                                                             \
 989   develop(bool, PrintDebugInfo, false,                                      \
 990           "Print debug information for all nmethods when generated")        \
 991                                                                             \
 992   develop(bool, PrintRelocations, false,                                    \
 993           "Print relocation information for all nmethods when generated")   \
 994                                                                             \
 995   develop(bool, PrintDependencies, false,                                   \
 996           "Print dependency information for all nmethods when generated")   \
 997                                                                             \
 998   develop(bool, PrintExceptionHandlers, false,                              \
 999           "Print exception handler tables for all nmethods when generated") \
1000                                                                             \
1001   develop(bool, StressCompiledExceptionHandlers, false,                     \
1002           "Exercise compiled exception handlers")                           \
1003                                                                             \
1004   develop(bool, InterceptOSException, false,                                \
1005           "Start debugger when an implicit OS (e.g. NULL) "                 \
1006           "exception happens")                                              \
1007                                                                             \
1008   product(bool, PrintCodeCache, false,                                      \
1009           "Print the code cache memory usage when exiting")                 \
1010                                                                             \
1011   develop(bool, PrintCodeCache2, false,                                     \
1012           "Print detailed usage information on the code cache when exiting")\
1013                                                                             \
1014   product(bool, PrintCodeCacheOnCompilation, false,                         \
1015           "Print the code cache memory usage each time a method is "        \
1016           "compiled")                                                       \
1017                                                                             \
1018   diagnostic(bool, PrintStubCode, false,                                    \
1019           "Print generated stub code")                                      \
1020                                                                             \
1021   product(bool, StackTraceInThrowable, true,                                \
1022           "Collect backtrace in throwable when exception happens")          \
1023                                                                             \
1024   product(bool, OmitStackTraceInFastThrow, true,                            \
1025           "Omit backtraces for some 'hot' exceptions in optimized code")    \
1026                                                                             \
1027   product(bool, ProfilerPrintByteCodeStatistics, false,                     \
1028           "Print bytecode statistics when dumping profiler output")         \
1029                                                                             \
1030   product(bool, ProfilerRecordPC, false,                                    \
1031           "Collect ticks for each 16 byte interval of compiled code")       \
1032                                                                             \
1033   product(bool, ProfileVM, false,                                           \
1034           "Profile ticks that fall within VM (either in the VM Thread "     \
1035           "or VM code called through stubs)")                               \
1036                                                                             \
1037   product(bool, ProfileIntervals, false,                                    \
1038           "Print profiles for each interval (see ProfileIntervalsTicks)")   \
1039                                                                             \
1040   notproduct(bool, ProfilerCheckIntervals, false,                           \
1041           "Collect and print information on spacing of profiler ticks")     \
1042                                                                             \
1043   develop(bool, PrintJVMWarnings, false,                                    \
1044           "Print warnings for unimplemented JVM functions")                 \
1045                                                                             \
1046   product(bool, PrintWarnings, true,                                        \
1047           "Print JVM warnings to output stream")                            \
1048                                                                             \
1049   notproduct(uintx, WarnOnStalledSpinLock, 0,                               \
1050           "Print warnings for stalled SpinLocks")                           \
1051                                                                             \
1052   product(bool, RegisterFinalizersAtInit, true,                             \
1053           "Register finalizable objects at end of Object.<init> or "        \
1054           "after allocation")                                               \
1055                                                                             \
1056   develop(bool, RegisterReferences, true,                                   \
1057           "Tell whether the VM should register soft/weak/final/phantom "    \
1058           "references")                                                     \
1059                                                                             \
1060   develop(bool, IgnoreRewrites, false,                                      \
1061           "Suppress rewrites of bytecodes in the oopmap generator. "        \
1062           "This is unsafe!")                                                \
1063                                                                             \
1064   develop(bool, PrintCodeCacheExtension, false,                             \
1065           "Print extension of code cache")                                  \
1066                                                                             \
1067   develop(bool, UsePrivilegedStack, true,                                   \
1068           "Enable the security JVM functions")                              \
1069                                                                             \
1070   develop(bool, ProtectionDomainVerification, true,                         \
1071           "Verify protection domain before resolution in system dictionary")\
1072                                                                             \
1073   product(bool, ClassUnloading, true,                                       \
1074           "Do unloading of classes")                                        \
1075                                                                             \
1076   product(bool, ClassUnloadingWithConcurrentMark, true,                     \
1077           "Do unloading of classes with a concurrent marking cycle")        \
1078                                                                             \
1079   develop(bool, DisableStartThread, false,                                  \
1080           "Disable starting of additional Java threads "                    \
1081           "(for debugging only)")                                           \
1082                                                                             \
1083   develop(bool, MemProfiling, false,                                        \
1084           "Write memory usage profiling to log file")                       \
1085                                                                             \
1086   notproduct(bool, PrintSystemDictionaryAtExit, false,                      \
1087           "Print the system dictionary at exit")                            \
1088                                                                             \
1089   experimental(intx, PredictedLoadedClassCount, 0,                          \
1090           "Experimental: Tune loaded class cache starting size")            \
1091                                                                             \
1092   diagnostic(bool, UnsyncloadClass, false,                                  \
1093           "Unstable: VM calls loadClass unsynchronized. Custom "            \
1094           "class loader must call VM synchronized for findClass "           \
1095           "and defineClass.")                                               \
1096                                                                             \
1097   product(bool, AlwaysLockClassLoader, false,                               \
1098           "Require the VM to acquire the class loader lock before calling " \
1099           "loadClass() even for class loaders registering "                 \
1100           "as parallel capable")                                            \
1101                                                                             \
1102   product(bool, AllowParallelDefineClass, false,                            \
1103           "Allow parallel defineClass requests for class loaders "          \
1104           "registering as parallel capable")                                \
1105                                                                             \
1106   product(bool, MustCallLoadClassInternal, false,                           \
1107           "Call loadClassInternal() rather than loadClass()")               \
1108                                                                             \
1109   product_pd(bool, DontYieldALot,                                           \
1110           "Throw away obvious excess yield calls (for Solaris only)")       \
1111                                                                             \
1112   product_pd(bool, ConvertSleepToYield,                                     \
1113           "Convert sleep(0) to thread yield "                               \
1114           "(may be off for Solaris to improve GUI)")                        \
1115                                                                             \
1116   product(bool, ConvertYieldToSleep, false,                                 \
1117           "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1118           "behavior (Solaris only)")                                        \
1119                                                                             \
1120   product(bool, UseBoundThreads, true,                                      \
1121           "Bind user level threads to kernel threads (for Solaris only)")   \
1122                                                                             \
1123   develop(bool, UseDetachedThreads, true,                                   \
1124           "Use detached threads that are recycled upon termination "        \
1125           "(for Solaris only)")                                             \
1126                                                                             \
1127   product(bool, UseLWPSynchronization, true,                                \
1128           "Use LWP-based instead of libthread-based synchronization "       \
1129           "(SPARC only)")                                                   \
1130                                                                             \
1131   product(ccstr, SyncKnobs, NULL,                                           \
1132           "(Unstable) Various monitor synchronization tunables")            \
1133                                                                             \
1134   product(intx, EmitSync, 0,                                                \
1135           "(Unsafe, Unstable) "                                             \
1136           "Control emission of inline sync fast-path code")                 \
1137                                                                             \
1138   product(intx, MonitorBound, 0, "Bound Monitor population")                \
1139                                                                             \
1140   product(bool, MonitorInUseLists, false, "Track Monitors for Deflation")   \
1141                                                                             \
1142   product(intx, SyncFlags, 0, "(Unsafe, Unstable) Experimental Sync flags") \
1143                                                                             \
1144   product(intx, SyncVerbose, 0, "(Unstable)")                               \
1145                                                                             \
1146   product(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)")                    \
1147                                                                             \
1148   product(intx, hashCode, 5,                                                \
1149           "(Unstable) select hashCode generation algorithm")                \
1150                                                                             \
1151   product(intx, WorkAroundNPTLTimedWaitHang, 1,                             \
1152           "(Unstable, Linux-specific) "                                     \
1153           "avoid NPTL-FUTEX hang pthread_cond_timedwait")                   \
1154                                                                             \
1155   product(bool, FilterSpuriousWakeups, true,                                \
1156           "Prevent spurious or premature wakeups from object.wait "         \
1157           "(Solaris only)")                                                 \
1158                                                                             \
1159   experimental(intx, NativeMonitorTimeout, -1, "(Unstable)")                \
1160                                                                             \
1161   experimental(intx, NativeMonitorFlags, 0, "(Unstable)")                   \
1162                                                                             \
1163   experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)")              \
1164                                                                             \
1165   develop(bool, UsePthreads, false,                                         \
1166           "Use pthread-based instead of libthread-based synchronization "   \
1167           "(SPARC only)")                                                   \
1168                                                                             \
1169   product(bool, AdjustConcurrency, false,                                   \
1170           "Call thr_setconcurrency at thread creation time to avoid "       \
1171           "LWP starvation on MP systems (for Solaris Only)")                \
1172                                                                             \
1173   product(bool, ReduceSignalUsage, false,                                   \
1174           "Reduce the use of OS signals in Java and/or the VM")             \
1175                                                                             \
1176   develop_pd(bool, ShareVtableStubs,                                        \
1177           "Share vtable stubs (smaller code but worse branch prediction")   \
1178                                                                             \
1179   develop(bool, LoadLineNumberTables, true,                                 \
1180           "Tell whether the class file parser loads line number tables")    \
1181                                                                             \
1182   develop(bool, LoadLocalVariableTables, true,                              \
1183           "Tell whether the class file parser loads local variable tables") \
1184                                                                             \
1185   develop(bool, LoadLocalVariableTypeTables, true,                          \
1186           "Tell whether the class file parser loads local variable type"    \
1187           "tables")                                                         \
1188                                                                             \
1189   product(bool, AllowUserSignalHandlers, false,                             \
1190           "Do not complain if the application installs signal handlers "    \
1191           "(Solaris & Linux only)")                                         \
1192                                                                             \
1193   product(bool, UseSignalChaining, true,                                    \
1194           "Use signal-chaining to invoke signal handlers installed "        \
1195           "by the application (Solaris & Linux only)")                      \
1196                                                                             \
1197   product(bool, UseAltSigs, false,                                          \
1198           "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM "      \
1199           "internal signals (Solaris only)")                                \
1200                                                                             \
1201   product(bool, AllowJNIEnvProxy, false,                                    \
1202           "Allow JNIEnv proxies for jdbx")                                  \
1203                                                                             \
1204   product(bool, JNIDetachReleasesMonitors, true,                            \
1205           "JNI DetachCurrentThread releases monitors owned by thread")      \
1206                                                                             \
1207   product(bool, RestoreMXCSROnJNICalls, false,                              \
1208           "Restore MXCSR when returning from JNI calls")                    \
1209                                                                             \
1210   product(bool, CheckJNICalls, false,                                       \
1211           "Verify all arguments to JNI calls")                              \
1212                                                                             \
1213   product(bool, CheckEndorsedAndExtDirs, false,                             \
1214           "Verify the endorsed and extension directories are not used")     \
1215                                                                             \
1216   product(bool, UseFastJNIAccessors, true,                                  \
1217           "Use optimized versions of Get<Primitive>Field")                  \
1218                                                                             \
1219   product(intx, MaxJNILocalCapacity, 65536,                                 \
1220           "Maximum allowable local JNI handle capacity to "                 \
1221           "EnsureLocalCapacity() and PushLocalFrame(), "                    \
1222           "where <= 0 is unlimited, default: 65536")                        \
1223                                                                             \
1224   product(bool, EagerXrunInit, false,                                       \
1225           "Eagerly initialize -Xrun libraries; allows startup profiling, "  \
1226           "but not all -Xrun libraries may support the state of the VM "    \
1227           "at this time")                                                   \
1228                                                                             \
1229   product(bool, PreserveAllAnnotations, false,                              \
1230           "Preserve RuntimeInvisibleAnnotations as well "                   \
1231           "as RuntimeVisibleAnnotations")                                   \
1232                                                                             \
1233   develop(uintx, PreallocatedOutOfMemoryErrorCount, 4,                      \
1234           "Number of OutOfMemoryErrors preallocated with backtrace")        \
1235                                                                             \
1236   product(bool, LazyBootClassLoader, true,                                  \
1237           "Enable/disable lazy opening of boot class path entries")         \
1238                                                                             \
1239   product(bool, UseXMMForArrayCopy, false,                                  \
1240           "Use SSE2 MOVQ instruction for Arraycopy")                        \
1241                                                                             \
1242   product(intx, FieldsAllocationStyle, 1,                                   \
1243           "0 - type based with oops first, 1 - with oops last, "            \
1244           "2 - oops in super and sub classes are together")                 \
1245                                                                             \
1246   product(bool, CompactFields, true,                                        \
1247           "Allocate nonstatic fields in gaps between previous fields")      \
1248                                                                             \
1249   notproduct(bool, PrintFieldLayout, false,                                 \
1250           "Print field layout for each class")                              \
1251                                                                             \
1252   product(intx, ContendedPaddingWidth, 128,                                 \
1253           "How many bytes to pad the fields/classes marked @Contended with")\
1254                                                                             \
1255   product(bool, EnableContended, true,                                      \
1256           "Enable @Contended annotation support")                           \
1257                                                                             \
1258   product(bool, RestrictContended, true,                                    \
1259           "Restrict @Contended to trusted classes")                         \
1260                                                                             \
1261   product(bool, UseBiasedLocking, true,                                     \
1262           "Enable biased locking in JVM")                                   \
1263                                                                             \
1264   product(intx, BiasedLockingStartupDelay, 4000,                            \
1265           "Number of milliseconds to wait before enabling biased locking")  \
1266                                                                             \
1267   diagnostic(bool, PrintBiasedLockingStatistics, false,                     \
1268           "Print statistics of biased locking in JVM")                      \
1269                                                                             \
1270   product(intx, BiasedLockingBulkRebiasThreshold, 20,                       \
1271           "Threshold of number of revocations per type to try to "          \
1272           "rebias all objects in the heap of that type")                    \
1273                                                                             \
1274   product(intx, BiasedLockingBulkRevokeThreshold, 40,                       \
1275           "Threshold of number of revocations per type to permanently "     \
1276           "revoke biases of all objects in the heap of that type")          \
1277                                                                             \
1278   product(intx, BiasedLockingDecayTime, 25000,                              \
1279           "Decay time (in milliseconds) to re-enable bulk rebiasing of a "  \
1280           "type after previous bulk rebias")                                \
1281                                                                             \
1282   product(bool, ExitOnOutOfMemoryError, false,                              \
1283           "JVM exits on the first occurrence of an out-of-memory error")    \
1284                                                                             \
1285   product(bool, CrashOnOutOfMemoryError, false,                             \
1286           "JVM aborts, producing an error log and core/mini dump, on the "  \
1287           "first occurrence of an out-of-memory error")                     \
1288                                                                             \
1289   /* tracing */                                                             \
1290                                                                             \
1291   notproduct(bool, TraceRuntimeCalls, false,                                \
1292           "Trace run-time calls")                                           \
1293                                                                             \
1294   develop(bool, TraceJNICalls, false,                                       \
1295           "Trace JNI calls")                                                \
1296                                                                             \
1297   develop(bool, StressRewriter, false,                                      \
1298           "Stress linktime bytecode rewriting")                             \
1299                                                                             \
1300   notproduct(bool, TraceJVMCalls, false,                                    \
1301           "Trace JVM calls")                                                \
1302                                                                             \
1303   product(ccstr, TraceJVMTI, NULL,                                          \
1304           "Trace flags for JVMTI functions and events")                     \
1305                                                                             \
1306   /* This option can change an EMCP method into an obsolete method. */      \
1307   /* This can affect tests that except specific methods to be EMCP. */      \
1308   /* This option should be used with caution. */                            \
1309   product(bool, StressLdcRewrite, false,                                    \
1310           "Force ldc -> ldc_w rewrite during RedefineClasses")              \
1311                                                                             \
1312   product(intx, TraceRedefineClasses, 0,                                    \
1313           "Trace level for JVMTI RedefineClasses")                          \
1314                                                                             \
1315   develop(bool, StressMethodComparator, false,                              \
1316           "Run the MethodComparator on all loaded methods")                 \
1317                                                                             \
1318   /* change to false by default sometime after Mustang */                   \
1319   product(bool, VerifyMergedCPBytecodes, true,                              \
1320           "Verify bytecodes after RedefineClasses constant pool merging")   \
1321                                                                             \
1322   develop(bool, TraceJNIHandleAllocation, false,                            \
1323           "Trace allocation/deallocation of JNI handle blocks")             \
1324                                                                             \
1325   develop(bool, TraceThreadEvents, false,                                   \
1326           "Trace all thread events")                                        \
1327                                                                             \
1328   develop(bool, TraceBytecodes, false,                                      \
1329           "Trace bytecode execution")                                       \
1330                                                                             \
1331   develop(bool, TraceClassInitialization, false,                            \
1332           "Trace class initialization")                                     \
1333                                                                             \
1334   develop(bool, TraceExceptions, false,                                     \
1335           "Trace exceptions")                                               \
1336                                                                             \
1337   develop(bool, TraceICs, false,                                            \
1338           "Trace inline cache changes")                                     \
1339                                                                             \
1340   notproduct(bool, TraceInvocationCounterOverflow, false,                   \
1341           "Trace method invocation counter overflow")                       \
1342                                                                             \
1343   develop(bool, TraceInlineCacheClearing, false,                            \
1344           "Trace clearing of inline caches in nmethods")                    \
1345                                                                             \
1346   develop(bool, TraceDependencies, false,                                   \
1347           "Trace dependencies")                                             \
1348                                                                             \
1349   develop(bool, VerifyDependencies, trueInDebug,                            \
1350           "Exercise and verify the compilation dependency mechanism")       \
1351                                                                             \
1352   develop(bool, TraceNewOopMapGeneration, false,                            \
1353           "Trace OopMapGeneration")                                         \
1354                                                                             \
1355   develop(bool, TraceNewOopMapGenerationDetailed, false,                    \
1356           "Trace OopMapGeneration: print detailed cell states")             \
1357                                                                             \
1358   develop(bool, TimeOopMap, false,                                          \
1359           "Time calls to GenerateOopMap::compute_map() in sum")             \
1360                                                                             \
1361   develop(bool, TimeOopMap2, false,                                         \
1362           "Time calls to GenerateOopMap::compute_map() individually")       \
1363                                                                             \
1364   develop(bool, TraceMonitorMismatch, false,                                \
1365           "Trace monitor matching failures during OopMapGeneration")        \
1366                                                                             \
1367   develop(bool, TraceOopMapRewrites, false,                                 \
1368           "Trace rewriting of method oops during oop map generation")       \
1369                                                                             \
1370   develop(bool, TraceSafepoint, false,                                      \
1371           "Trace safepoint operations")                                     \
1372                                                                             \
1373   develop(bool, TraceICBuffer, false,                                       \
1374           "Trace usage of IC buffer")                                       \
1375                                                                             \
1376   develop(bool, TraceCompiledIC, false,                                     \
1377           "Trace changes of compiled IC")                                   \
1378                                                                             \
1379   notproduct(bool, TraceZapDeadLocals, false,                               \
1380           "Trace zapping dead locals")                                      \
1381                                                                             \
1382   develop(bool, TraceStartupTime, false,                                    \
1383           "Trace setup time")                                               \
1384                                                                             \
1385   develop(bool, TraceProtectionDomainVerification, false,                   \
1386           "Trace protection domain verification")                           \
1387                                                                             \
1388   develop(bool, TraceClearedExceptions, false,                              \
1389           "Print when an exception is forcibly cleared")                    \
1390                                                                             \
1391   product(bool, TraceClassResolution, false,                                \
1392           "Trace all constant pool resolutions (for debugging)")            \
1393                                                                             \
1394   product(bool, TraceBiasedLocking, false,                                  \
1395           "Trace biased locking in JVM")                                    \
1396                                                                             \
1397   product(bool, TraceMonitorInflation, false,                               \
1398           "Trace monitor inflation in JVM")                                 \
1399                                                                             \
1400   /* gc */                                                                  \
1401                                                                             \
1402   product(bool, UseSerialGC, false,                                         \
1403           "Use the Serial garbage collector")                               \
1404                                                                             \
1405   product(bool, UseG1GC, false,                                             \
1406           "Use the Garbage-First garbage collector")                        \
1407                                                                             \
1408   product(bool, UseParallelGC, false,                                       \
1409           "Use the Parallel Scavenge garbage collector")                    \
1410                                                                             \
1411   product(bool, UseParallelOldGC, false,                                    \
1412           "Use the Parallel Old garbage collector")                         \
1413                                                                             \
1414   product(uintx, HeapMaximumCompactionInterval, 20,                         \
1415           "How often should we maximally compact the heap (not allowing "   \
1416           "any dead space)")                                                \
1417                                                                             \
1418   product(uintx, HeapFirstMaximumCompactionCount, 3,                        \
1419           "The collection count for the first maximum compaction")          \
1420                                                                             \
1421   product(bool, UseMaximumCompactionOnSystemGC, true,                       \
1422           "Use maximum compaction in the Parallel Old garbage collector "   \
1423           "for a system GC")                                                \
1424                                                                             \
1425   product(uintx, ParallelOldDeadWoodLimiterMean, 50,                        \
1426           "The mean used by the parallel compact dead wood "                \
1427           "limiter (a number between 0-100)")                               \
1428                                                                             \
1429   product(uintx, ParallelOldDeadWoodLimiterStdDev, 80,                      \
1430           "The standard deviation used by the parallel compact dead wood "  \
1431           "limiter (a number between 0-100)")                               \
1432                                                                             \
1433   product(uintx, ParallelGCThreads, 0,                                      \
1434           "Number of parallel threads parallel gc will use")                \
1435                                                                             \
1436   product(bool, UseDynamicNumberOfGCThreads, false,                         \
1437           "Dynamically choose the number of parallel threads "              \
1438           "parallel gc will use")                                           \
1439                                                                             \
1440   diagnostic(bool, ForceDynamicNumberOfGCThreads, false,                    \
1441           "Force dynamic selection of the number of "                       \
1442           "parallel threads parallel gc will use to aid debugging")         \
1443                                                                             \
1444   product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M),               \
1445           "Size of heap (bytes) per GC thread used in calculating the "     \
1446           "number of GC threads")                                           \
1447                                                                             \
1448   product(bool, TraceDynamicGCThreads, false,                               \
1449           "Trace the dynamic GC thread usage")                              \
1450                                                                             \
1451   develop(bool, ParallelOldGCSplitALot, false,                              \
1452           "Provoke splitting (copying data from a young gen space to "      \
1453           "multiple destination spaces)")                                   \
1454                                                                             \
1455   develop(uintx, ParallelOldGCSplitInterval, 3,                             \
1456           "How often to provoke splitting a young gen space")               \
1457                                                                             \
1458   product(uintx, ConcGCThreads, 0,                                          \
1459           "Number of threads concurrent gc will use")                       \
1460                                                                             \
1461   product(uintx, YoungPLABSize, 4096,                                       \
1462           "Size of young gen promotion LAB's (in HeapWords)")               \
1463                                                                             \
1464   product(uintx, OldPLABSize, 1024,                                         \
1465           "Size of old gen promotion LAB's (in HeapWords)")                 \
1466                                                                             \
1467   product(uintx, GCTaskTimeStampEntries, 200,                               \
1468           "Number of time stamp entries per gc worker thread")              \
1469                                                                             \
1470   product(bool, AlwaysTenure, false,                                        \
1471           "Always tenure objects in eden (ParallelGC only)")                \
1472                                                                             \
1473   product(bool, NeverTenure, false,                                         \
1474           "Never tenure objects in eden, may tenure on overflow "           \
1475           "(ParallelGC only)")                                              \
1476                                                                             \
1477   product(bool, ScavengeBeforeFullGC, true,                                 \
1478           "Scavenge youngest generation before each full GC, "              \
1479           "used with UseParallelGC")                                        \
1480                                                                             \
1481   develop(bool, ScavengeWithObjectsInToSpace, false,                        \
1482           "Allow scavenges to occur when to-space contains objects")        \
1483                                                                             \
1484   product(bool, UseConcMarkSweepGC, false,                                  \
1485           "Use Concurrent Mark-Sweep GC in the old generation")             \
1486                                                                             \
1487   product(bool, ExplicitGCInvokesConcurrent, false,                         \
1488           "A System.gc() request invokes a concurrent collection; "         \
1489           "(effective only when UseConcMarkSweepGC)")                       \
1490                                                                             \
1491   product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false,        \
1492           "A System.gc() request invokes a concurrent collection and "      \
1493           "also unloads classes during such a concurrent gc cycle "         \
1494           "(effective only when UseConcMarkSweepGC)")                       \
1495                                                                             \
1496   product(bool, GCLockerInvokesConcurrent, false,                           \
1497           "The exit of a JNI critical section necessitating a scavenge, "   \
1498           "also kicks off a background concurrent collection")              \
1499                                                                             \
1500   product(uintx, GCLockerEdenExpansionPercent, 5,                           \
1501           "How much the GC can expand the eden by while the GC locker "     \
1502           "is active (as a percentage)")                                    \
1503                                                                             \
1504   diagnostic(uintx, GCLockerRetryAllocationCount, 2,                        \
1505           "Number of times to retry allocations when "                      \
1506           "blocked by the GC locker")                                       \
1507                                                                             \
1508   develop(bool, UseCMSAdaptiveFreeLists, true,                              \
1509           "Use adaptive free lists in the CMS generation")                  \
1510                                                                             \
1511   develop(bool, UseAsyncConcMarkSweepGC, true,                              \
1512           "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1513                                                                             \
1514   develop(bool, RotateCMSCollectionTypes, false,                            \
1515           "Rotate the CMS collections among concurrent and STW")            \
1516                                                                             \
1517   product(bool, UseCMSBestFit, true,                                        \
1518           "Use CMS best fit allocation strategy")                           \
1519                                                                             \
1520   product(bool, UseCMSCollectionPassing, true,                              \
1521           "Use passing of collection from background to foreground")        \
1522                                                                             \
1523   product(bool, UseParNewGC, false,                                         \
1524           "Use parallel threads in the new generation")                     \
1525                                                                             \
1526   product(bool, ParallelGCVerbose, false,                                   \
1527           "Verbose output for parallel gc")                                 \
1528                                                                             \
1529   product(uintx, ParallelGCBufferWastePct, 10,                              \
1530           "Wasted fraction of parallel allocation buffer")                  \
1531                                                                             \
1532   diagnostic(bool, ParallelGCRetainPLAB, false,                             \
1533           "Retain parallel allocation buffers across scavenges; "           \
1534           "it is disabled because this currently conflicts with "           \
1535           "parallel card scanning under certain conditions.")               \
1536                                                                             \
1537   product(uintx, TargetPLABWastePct, 10,                                    \
1538           "Target wasted space in last buffer as percent of overall "       \
1539           "allocation")                                                     \
1540                                                                             \
1541   product(uintx, PLABWeight, 75,                                            \
1542           "Percentage (0-100) used to weigh the current sample when "       \
1543           "computing exponentially decaying average for ResizePLAB")        \
1544                                                                             \
1545   product(bool, ResizePLAB, true,                                           \
1546           "Dynamically resize (survivor space) promotion LAB's")            \
1547                                                                             \
1548   product(bool, PrintPLAB, false,                                           \
1549           "Print (survivor space) promotion LAB's sizing decisions")        \
1550                                                                             \
1551   product(intx, ParGCArrayScanChunk, 50,                                    \
1552           "Scan a subset of object array and push remainder, if array is "  \
1553           "bigger than this")                                               \
1554                                                                             \
1555   product(bool, ParGCUseLocalOverflow, false,                               \
1556           "Instead of a global overflow list, use local overflow stacks")   \
1557                                                                             \
1558   product(bool, ParGCTrimOverflow, true,                                    \
1559           "Eagerly trim the local overflow lists "                          \
1560           "(when ParGCUseLocalOverflow)")                                   \
1561                                                                             \
1562   notproduct(bool, ParGCWorkQueueOverflowALot, false,                       \
1563           "Simulate work queue overflow in ParNew")                         \
1564                                                                             \
1565   notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000,                   \
1566           "An `interval' counter that determines how frequently "           \
1567           "we simulate overflow; a smaller number increases frequency")     \
1568                                                                             \
1569   product(uintx, ParGCDesiredObjsFromOverflowList, 20,                      \
1570           "The desired number of objects to claim from the overflow list")  \
1571                                                                             \
1572   diagnostic(uintx, ParGCStridesPerThread, 2,                               \
1573           "The number of strides per worker thread that we divide up the "  \
1574           "card table scanning work into")                                  \
1575                                                                             \
1576   diagnostic(intx, ParGCCardsPerStrideChunk, 256,                           \
1577           "The number of cards in each chunk of the parallel chunks used "  \
1578           "during card table scanning")                                     \
1579                                                                             \
1580   product(uintx, CMSParPromoteBlocksToClaim, 16,                            \
1581           "Number of blocks to attempt to claim when refilling CMS LAB's "  \
1582           "for parallel GC")                                                \
1583                                                                             \
1584   product(uintx, OldPLABWeight, 50,                                         \
1585           "Percentage (0-100) used to weight the current sample when "      \
1586           "computing exponentially decaying average for resizing "          \
1587           "CMSParPromoteBlocksToClaim")                                     \
1588                                                                             \
1589   product(bool, ResizeOldPLAB, true,                                        \
1590           "Dynamically resize (old gen) promotion LAB's")                   \
1591                                                                             \
1592   product(bool, PrintOldPLAB, false,                                        \
1593           "Print (old gen) promotion LAB's sizing decisions")               \
1594                                                                             \
1595   product(uintx, CMSOldPLABMin, 16,                                         \
1596           "Minimum size of CMS gen promotion LAB caches per worker "        \
1597           "per block size")                                                 \
1598                                                                             \
1599   product(uintx, CMSOldPLABMax, 1024,                                       \
1600           "Maximum size of CMS gen promotion LAB caches per worker "        \
1601           "per block size")                                                 \
1602                                                                             \
1603   product(uintx, CMSOldPLABNumRefills, 4,                                   \
1604           "Nominal number of refills of CMS gen promotion LAB cache "       \
1605           "per worker per block size")                                      \
1606                                                                             \
1607   product(bool, CMSOldPLABResizeQuicker, false,                             \
1608           "React on-the-fly during a scavenge to a sudden "                 \
1609           "change in block demand rate")                                    \
1610                                                                             \
1611   product(uintx, CMSOldPLABToleranceFactor, 4,                              \
1612           "The tolerance of the phase-change detector for on-the-fly "      \
1613           "PLAB resizing during a scavenge")                                \
1614                                                                             \
1615   product(uintx, CMSOldPLABReactivityFactor, 2,                             \
1616           "The gain in the feedback loop for on-the-fly PLAB resizing "     \
1617           "during a scavenge")                                              \
1618                                                                             \
1619   product(bool, AlwaysPreTouch, false,                                      \
1620           "Force all freshly committed pages to be pre-touched")            \
1621                                                                             \
1622   product_pd(uintx, CMSYoungGenPerWorker,                                   \
1623           "The maximum size of young gen chosen by default per GC worker "  \
1624           "thread available")                                               \
1625                                                                             \
1626   product(bool, CMSIncrementalMode, false,                                  \
1627           "Whether CMS GC should operate in \"incremental\" mode")          \
1628                                                                             \
1629   product(uintx, CMSIncrementalDutyCycle, 10,                               \
1630           "Percentage (0-100) of CMS incremental mode duty cycle. If "      \
1631           "CMSIncrementalPacing is enabled, then this is just the initial " \
1632           "value.")                                                         \
1633                                                                             \
1634   product(bool, CMSIncrementalPacing, true,                                 \
1635           "Whether the CMS incremental mode duty cycle should be "          \
1636           "automatically adjusted")                                         \
1637                                                                             \
1638   product(uintx, CMSIncrementalDutyCycleMin, 0,                             \
1639           "Minimum percentage (0-100) of the CMS incremental duty cycle "   \
1640           "used when CMSIncrementalPacing is enabled")                      \
1641                                                                             \
1642   product(uintx, CMSIncrementalSafetyFactor, 10,                            \
1643           "Percentage (0-100) used to add conservatism when computing the " \
1644           "duty cycle")                                                     \
1645                                                                             \
1646   product(uintx, CMSIncrementalOffset, 0,                                   \
1647           "Percentage (0-100) by which the CMS incremental mode duty cycle "\
1648           "is shifted to the right within the period between young GCs")    \
1649                                                                             \
1650   product(uintx, CMSExpAvgFactor, 50,                                       \
1651           "Percentage (0-100) used to weigh the current sample when "       \
1652           "computing exponential averages for CMS statistics")              \
1653                                                                             \
1654   product(uintx, CMS_FLSWeight, 75,                                         \
1655           "Percentage (0-100) used to weigh the current sample when "       \
1656           "computing exponentially decaying averages for CMS FLS "          \
1657           "statistics")                                                     \
1658                                                                             \
1659   product(uintx, CMS_FLSPadding, 1,                                         \
1660           "The multiple of deviation from mean to use for buffering "       \
1661           "against volatility in free list demand")                         \
1662                                                                             \
1663   product(uintx, FLSCoalescePolicy, 2,                                      \
1664           "CMS: aggressiveness level for coalescing, increasing "           \
1665           "from 0 to 4")                                                    \
1666                                                                             \
1667   product(bool, FLSAlwaysCoalesceLarge, false,                              \
1668           "CMS: larger free blocks are always available for coalescing")    \
1669                                                                             \
1670   product(double, FLSLargestBlockCoalesceProximity, 0.99,                   \
1671           "CMS: the smaller the percentage the greater the coalescing "     \
1672           "force")                                                          \
1673                                                                             \
1674   product(double, CMSSmallCoalSurplusPercent, 1.05,                         \
1675           "CMS: the factor by which to inflate estimated demand of small "  \
1676           "block sizes to prevent coalescing with an adjoining block")      \
1677                                                                             \
1678   product(double, CMSLargeCoalSurplusPercent, 0.95,                         \
1679           "CMS: the factor by which to inflate estimated demand of large "  \
1680           "block sizes to prevent coalescing with an adjoining block")      \
1681                                                                             \
1682   product(double, CMSSmallSplitSurplusPercent, 1.10,                        \
1683           "CMS: the factor by which to inflate estimated demand of small "  \
1684           "block sizes to prevent splitting to supply demand for smaller "  \
1685           "blocks")                                                         \
1686                                                                             \
1687   product(double, CMSLargeSplitSurplusPercent, 1.00,                        \
1688           "CMS: the factor by which to inflate estimated demand of large "  \
1689           "block sizes to prevent splitting to supply demand for smaller "  \
1690           "blocks")                                                         \
1691                                                                             \
1692   product(bool, CMSExtrapolateSweep, false,                                 \
1693           "CMS: cushion for block demand during sweep")                     \
1694                                                                             \
1695   product(uintx, CMS_SweepWeight, 75,                                       \
1696           "Percentage (0-100) used to weight the current sample when "      \
1697           "computing exponentially decaying average for inter-sweep "       \
1698           "duration")                                                       \
1699                                                                             \
1700   product(uintx, CMS_SweepPadding, 1,                                       \
1701           "The multiple of deviation from mean to use for buffering "       \
1702           "against volatility in inter-sweep duration")                     \
1703                                                                             \
1704   product(uintx, CMS_SweepTimerThresholdMillis, 10,                         \
1705           "Skip block flux-rate sampling for an epoch unless inter-sweep "  \
1706           "duration exceeds this threshold in milliseconds")                \
1707                                                                             \
1708   develop(bool, CMSTraceIncrementalMode, false,                             \
1709           "Trace CMS incremental mode")                                     \
1710                                                                             \
1711   develop(bool, CMSTraceIncrementalPacing, false,                           \
1712           "Trace CMS incremental mode pacing computation")                  \
1713                                                                             \
1714   develop(bool, CMSTraceThreadState, false,                                 \
1715           "Trace the CMS thread state (enable the trace_state() method)")   \
1716                                                                             \
1717   product(bool, CMSClassUnloadingEnabled, true,                             \
1718           "Whether class unloading enabled when using CMS GC")              \
1719                                                                             \
1720   product(uintx, CMSClassUnloadingMaxInterval, 0,                           \
1721           "When CMS class unloading is enabled, the maximum CMS cycle "     \
1722           "count for which classes may not be unloaded")                    \
1723                                                                             \
1724   product(bool, CMSCompactWhenClearAllSoftRefs, true,                       \
1725           "Compact when asked to collect CMS gen with "                     \
1726           "clear_all_soft_refs()")                                          \
1727                                                                             \
1728   product(bool, UseCMSCompactAtFullCollection, true,                        \
1729           "Use Mark-Sweep-Compact algorithm at full collections")           \
1730                                                                             \
1731   product(uintx, CMSFullGCsBeforeCompaction, 0,                             \
1732           "Number of CMS full collection done before compaction if > 0")    \
1733                                                                             \
1734   develop(intx, CMSDictionaryChoice, 0,                                     \
1735           "Use BinaryTreeDictionary as default in the CMS generation")      \
1736                                                                             \
1737   product(uintx, CMSIndexedFreeListReplenish, 4,                            \
1738           "Replenish an indexed free list with this number of chunks")      \
1739                                                                             \
1740   product(bool, CMSReplenishIntermediate, true,                             \
1741           "Replenish all intermediate free-list caches")                    \
1742                                                                             \
1743   product(bool, CMSSplitIndexedFreeListBlocks, true,                        \
1744           "When satisfying batched demand, split blocks from the "          \
1745           "IndexedFreeList whose size is a multiple of requested size")     \
1746                                                                             \
1747   product(bool, CMSLoopWarn, false,                                         \
1748           "Warn in case of excessive CMS looping")                          \
1749                                                                             \
1750   develop(bool, CMSOverflowEarlyRestoration, false,                         \
1751           "Restore preserved marks early")                                  \
1752                                                                             \
1753   product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M),              \
1754           "Size of marking stack")                                          \
1755                                                                             \
1756   product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M),          \
1757           "Maximum size of marking stack")                                  \
1758                                                                             \
1759   notproduct(bool, CMSMarkStackOverflowALot, false,                         \
1760           "Simulate frequent marking stack / work queue overflow")          \
1761                                                                             \
1762   notproduct(uintx, CMSMarkStackOverflowInterval, 1000,                     \
1763           "An \"interval\" counter that determines how frequently "         \
1764           "to simulate overflow; a smaller number increases frequency")     \
1765                                                                             \
1766   product(uintx, CMSMaxAbortablePrecleanLoops, 0,                           \
1767           "(Temporary, subject to experimentation) "                        \
1768           "Maximum number of abortable preclean iterations, if > 0")        \
1769                                                                             \
1770   product(intx, CMSMaxAbortablePrecleanTime, 5000,                          \
1771           "(Temporary, subject to experimentation) "                        \
1772           "Maximum time in abortable preclean (in milliseconds)")           \
1773                                                                             \
1774   product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100,              \
1775           "(Temporary, subject to experimentation) "                        \
1776           "Nominal minimum work per abortable preclean iteration")          \
1777                                                                             \
1778   manageable(intx, CMSAbortablePrecleanWaitMillis, 100,                     \
1779           "(Temporary, subject to experimentation) "                        \
1780           "Time that we sleep between iterations when not given "           \
1781           "enough work per iteration")                                      \
1782                                                                             \
1783   product(uintx, CMSRescanMultiple, 32,                                     \
1784           "Size (in cards) of CMS parallel rescan task")                    \
1785                                                                             \
1786   product(uintx, CMSConcMarkMultiple, 32,                                   \
1787           "Size (in cards) of CMS concurrent MT marking task")              \
1788                                                                             \
1789   product(bool, CMSAbortSemantics, false,                                   \
1790           "Whether abort-on-overflow semantics is implemented")             \
1791                                                                             \
1792   product(bool, CMSParallelInitialMarkEnabled, true,                        \
1793           "Use the parallel initial mark.")                                 \
1794                                                                             \
1795   product(bool, CMSParallelRemarkEnabled, true,                             \
1796           "Whether parallel remark enabled (only if ParNewGC)")             \
1797                                                                             \
1798   product(bool, CMSParallelSurvivorRemarkEnabled, true,                     \
1799           "Whether parallel remark of survivor space "                      \
1800           "enabled (effective only if CMSParallelRemarkEnabled)")           \
1801                                                                             \
1802   product(bool, CMSPLABRecordAlways, true,                                  \
1803           "Always record survivor space PLAB boundaries (effective only "   \
1804           "if CMSParallelSurvivorRemarkEnabled)")                           \
1805                                                                             \
1806   product(bool, CMSEdenChunksRecordAlways, true,                            \
1807           "Always record eden chunks used for the parallel initial mark "   \
1808           "or remark of eden")                                              \
1809                                                                             \
1810   product(bool, CMSPrintEdenSurvivorChunks, false,                          \
1811           "Print the eden and the survivor chunks used for the parallel "   \
1812           "initial mark or remark of the eden/survivor spaces")             \
1813                                                                             \
1814   product(bool, CMSConcurrentMTEnabled, true,                               \
1815           "Whether multi-threaded concurrent work enabled "                 \
1816           "(effective only if ParNewGC)")                                   \
1817                                                                             \
1818   product(bool, CMSPrecleaningEnabled, true,                                \
1819           "Whether concurrent precleaning enabled")                         \
1820                                                                             \
1821   product(uintx, CMSPrecleanIter, 3,                                        \
1822           "Maximum number of precleaning iteration passes")                 \
1823                                                                             \
1824   product(uintx, CMSPrecleanNumerator, 2,                                   \
1825           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1826           "ratio")                                                          \
1827                                                                             \
1828   product(uintx, CMSPrecleanDenominator, 3,                                 \
1829           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1830           "ratio")                                                          \
1831                                                                             \
1832   product(bool, CMSPrecleanRefLists1, true,                                 \
1833           "Preclean ref lists during (initial) preclean phase")             \
1834                                                                             \
1835   product(bool, CMSPrecleanRefLists2, false,                                \
1836           "Preclean ref lists during abortable preclean phase")             \
1837                                                                             \
1838   product(bool, CMSPrecleanSurvivors1, false,                               \
1839           "Preclean survivors during (initial) preclean phase")             \
1840                                                                             \
1841   product(bool, CMSPrecleanSurvivors2, true,                                \
1842           "Preclean survivors during abortable preclean phase")             \
1843                                                                             \
1844   product(uintx, CMSPrecleanThreshold, 1000,                                \
1845           "Do not iterate again if number of dirty cards is less than this")\
1846                                                                             \
1847   product(bool, CMSCleanOnEnter, true,                                      \
1848           "Clean-on-enter optimization for reducing number of dirty cards") \
1849                                                                             \
1850   product(uintx, CMSRemarkVerifyVariant, 1,                                 \
1851           "Choose variant (1,2) of verification following remark")          \
1852                                                                             \
1853   product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M,                   \
1854           "If Eden size is below this, do not try to schedule remark")      \
1855                                                                             \
1856   product(uintx, CMSScheduleRemarkEdenPenetration, 50,                      \
1857           "The Eden occupancy percentage (0-100) at which "                 \
1858           "to try and schedule remark pause")                               \
1859                                                                             \
1860   product(uintx, CMSScheduleRemarkSamplingRatio, 5,                         \
1861           "Start sampling eden top at least before young gen "              \
1862           "occupancy reaches 1/<ratio> of the size at which "               \
1863           "we plan to schedule remark")                                     \
1864                                                                             \
1865   product(uintx, CMSSamplingGrain, 16*K,                                    \
1866           "The minimum distance between eden samples for CMS (see above)")  \
1867                                                                             \
1868   product(bool, CMSScavengeBeforeRemark, false,                             \
1869           "Attempt scavenge before the CMS remark step")                    \
1870                                                                             \
1871   develop(bool, CMSTraceSweeper, false,                                     \
1872           "Trace some actions of the CMS sweeper")                          \
1873                                                                             \
1874   product(uintx, CMSWorkQueueDrainThreshold, 10,                            \
1875           "Don't drain below this size per parallel worker/thief")          \
1876                                                                             \
1877   manageable(intx, CMSWaitDuration, 2000,                                   \
1878           "Time in milliseconds that CMS thread waits for young GC")        \
1879                                                                             \
1880   develop(uintx, CMSCheckInterval, 1000,                                    \
1881           "Interval in milliseconds that CMS thread checks if it "          \
1882           "should start a collection cycle")                                \
1883                                                                             \
1884   product(bool, CMSYield, true,                                             \
1885           "Yield between steps of CMS")                                     \
1886                                                                             \
1887   product(uintx, CMSBitMapYieldQuantum, 10*M,                               \
1888           "Bitmap operations should process at most this many bits "        \
1889           "between yields")                                                 \
1890                                                                             \
1891   product(bool, CMSDumpAtPromotionFailure, false,                           \
1892           "Dump useful information about the state of the CMS old "         \
1893           "generation upon a promotion failure")                            \
1894                                                                             \
1895   product(bool, CMSPrintChunksInDump, false,                                \
1896           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1897           "more detailed information about the free chunks")                \
1898                                                                             \
1899   product(bool, CMSPrintObjectsInDump, false,                               \
1900           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1901           "more detailed information about the allocated objects")          \
1902                                                                             \
1903   diagnostic(bool, FLSVerifyAllHeapReferences, false,                       \
1904           "Verify that all references across the FLS boundary "             \
1905           "are to valid objects")                                           \
1906                                                                             \
1907   diagnostic(bool, FLSVerifyLists, false,                                   \
1908           "Do lots of (expensive) FreeListSpace verification")              \
1909                                                                             \
1910   diagnostic(bool, FLSVerifyIndexTable, false,                              \
1911           "Do lots of (expensive) FLS index table verification")            \
1912                                                                             \
1913   develop(bool, FLSVerifyDictionary, false,                                 \
1914           "Do lots of (expensive) FLS dictionary verification")             \
1915                                                                             \
1916   develop(bool, VerifyBlockOffsetArray, false,                              \
1917           "Do (expensive) block offset array verification")                 \
1918                                                                             \
1919   diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false,              \
1920           "Maintain _unallocated_block in BlockOffsetArray "                \
1921           "(currently applicable only to CMS collector)")                   \
1922                                                                             \
1923   develop(bool, TraceCMSState, false,                                       \
1924           "Trace the state of the CMS collection")                          \
1925                                                                             \
1926   product(intx, RefDiscoveryPolicy, 0,                                      \
1927           "Select type of reference discovery policy: "                     \
1928           "reference-based(0) or referent-based(1)")                        \
1929                                                                             \
1930   product(bool, ParallelRefProcEnabled, false,                              \
1931           "Enable parallel reference processing whenever possible")         \
1932                                                                             \
1933   product(bool, ParallelRefProcBalancingEnabled, true,                      \
1934           "Enable balancing of reference processing queues")                \
1935                                                                             \
1936   product(uintx, CMSTriggerRatio, 80,                                       \
1937           "Percentage of MinHeapFreeRatio in CMS generation that is "       \
1938           "allocated before a CMS collection cycle commences")              \
1939                                                                             \
1940   product(uintx, CMSBootstrapOccupancy, 50,                                 \
1941           "Percentage CMS generation occupancy at which to "                \
1942           "initiate CMS collection for bootstrapping collection stats")     \
1943                                                                             \
1944   product(intx, CMSInitiatingOccupancyFraction, -1,                         \
1945           "Percentage CMS generation occupancy to start a CMS collection "  \
1946           "cycle. A negative value means that CMSTriggerRatio is used")     \
1947                                                                             \
1948   product(uintx, InitiatingHeapOccupancyPercent, 45,                        \
1949           "Percentage of the (entire) heap occupancy to start a "           \
1950           "concurrent GC cycle. It is used by GCs that trigger a "          \
1951           "concurrent GC cycle based on the occupancy of the entire heap, " \
1952           "not just one of the generations (e.g., G1). A value of 0 "       \
1953           "denotes 'do constant GC cycles'.")                               \
1954                                                                             \
1955   manageable(intx, CMSTriggerInterval, -1,                                  \
1956           "Commence a CMS collection cycle (at least) every so many "       \
1957           "milliseconds (0 permanently, -1 disabled)")                      \
1958                                                                             \
1959   product(bool, UseCMSInitiatingOccupancyOnly, false,                       \
1960           "Only use occupancy as a criterion for starting a CMS collection")\
1961                                                                             \
1962   product(uintx, CMSIsTooFullPercentage, 98,                                \
1963           "An absolute ceiling above which CMS will always consider the "   \
1964           "unloading of classes when class unloading is enabled")           \
1965                                                                             \
1966   develop(bool, CMSTestInFreeList, false,                                   \
1967           "Check if the coalesced range is already in the "                 \
1968           "free lists as claimed")                                          \
1969                                                                             \
1970   notproduct(bool, CMSVerifyReturnedBytes, false,                           \
1971           "Check that all the garbage collected was returned to the "       \
1972           "free lists")                                                     \
1973                                                                             \
1974   notproduct(bool, ScavengeALot, false,                                     \
1975           "Force scavenge at every Nth exit from the runtime system "       \
1976           "(N=ScavengeALotInterval)")                                       \
1977                                                                             \
1978   develop(bool, FullGCALot, false,                                          \
1979           "Force full gc at every Nth exit from the runtime system "        \
1980           "(N=FullGCALotInterval)")                                         \
1981                                                                             \
1982   notproduct(bool, GCALotAtAllSafepoints, false,                            \
1983           "Enforce ScavengeALot/GCALot at all potential safepoints")        \
1984                                                                             \
1985   product(bool, PrintPromotionFailure, false,                               \
1986           "Print additional diagnostic information following "              \
1987           "promotion failure")                                              \
1988                                                                             \
1989   notproduct(bool, PromotionFailureALot, false,                             \
1990           "Use promotion failure handling on every youngest generation "    \
1991           "collection")                                                     \
1992                                                                             \
1993   develop(uintx, PromotionFailureALotCount, 1000,                           \
1994           "Number of promotion failures occurring at ParGCAllocBuffer "     \
1995           "refill attempts (ParNew) or promotion attempts "                 \
1996           "(other young collectors)")                                       \
1997                                                                             \
1998   develop(uintx, PromotionFailureALotInterval, 5,                           \
1999           "Total collections between promotion failures alot")              \
2000                                                                             \
2001   experimental(uintx, WorkStealingSleepMillis, 1,                           \
2002           "Sleep time when sleep is used for yields")                       \
2003                                                                             \
2004   experimental(uintx, WorkStealingYieldsBeforeSleep, 5000,                  \
2005           "Number of yields before a sleep is done during workstealing")    \
2006                                                                             \
2007   experimental(uintx, WorkStealingHardSpins, 4096,                          \
2008           "Number of iterations in a spin loop between checks on "          \
2009           "time out of hard spin")                                          \
2010                                                                             \
2011   experimental(uintx, WorkStealingSpinToYieldRatio, 10,                     \
2012           "Ratio of hard spins to calls to yield")                          \
2013                                                                             \
2014   develop(uintx, ObjArrayMarkingStride, 512,                                \
2015           "Number of object array elements to push onto the marking stack " \
2016           "before pushing a continuation entry")                            \
2017                                                                             \
2018   develop(bool, MetadataAllocationFailALot, false,                          \
2019           "Fail metadata allocations at intervals controlled by "           \
2020           "MetadataAllocationFailALotInterval")                             \
2021                                                                             \
2022   develop(uintx, MetadataAllocationFailALotInterval, 1000,                  \
2023           "Metadata allocation failure a lot interval")                     \
2024                                                                             \
2025   develop(bool, TraceMetadataChunkAllocation, false,                        \
2026           "Trace chunk metadata allocations")                               \
2027                                                                             \
2028   product(bool, TraceMetadataHumongousAllocation, false,                    \
2029           "Trace humongous metadata allocations")                           \
2030                                                                             \
2031   develop(bool, TraceMetavirtualspaceAllocation, false,                     \
2032           "Trace virtual space metadata allocations")                       \
2033                                                                             \
2034   notproduct(bool, ExecuteInternalVMTests, false,                           \
2035           "Enable execution of internal VM tests")                          \
2036                                                                             \
2037   notproduct(bool, VerboseInternalVMTests, false,                           \
2038           "Turn on logging for internal VM tests.")                         \
2039                                                                             \
2040   product_pd(bool, UseTLAB, "Use thread-local object allocation")           \
2041                                                                             \
2042   product_pd(bool, ResizeTLAB,                                              \
2043           "Dynamically resize TLAB size for threads")                       \
2044                                                                             \
2045   product(bool, ZeroTLAB, false,                                            \
2046           "Zero out the newly created TLAB")                                \
2047                                                                             \
2048   product(bool, FastTLABRefill, true,                                       \
2049           "Use fast TLAB refill code")                                      \
2050                                                                             \
2051   product(bool, PrintTLAB, false,                                           \
2052           "Print various TLAB related information")                         \
2053                                                                             \
2054   product(bool, TLABStats, true,                                            \
2055           "Provide more detailed and expensive TLAB statistics "            \
2056           "(with PrintTLAB)")                                               \
2057                                                                             \
2058   product_pd(bool, NeverActAsServerClassMachine,                            \
2059           "Never act like a server-class machine")                          \
2060                                                                             \
2061   product(bool, AlwaysActAsServerClassMachine, false,                       \
2062           "Always act like a server-class machine")                         \
2063                                                                             \
2064   product_pd(uint64_t, MaxRAM,                                              \
2065           "Real memory size (in bytes) used to set maximum heap size")      \
2066                                                                             \
2067   product(uintx, ErgoHeapSizeLimit, 0,                                      \
2068           "Maximum ergonomically set heap size (in bytes); zero means use " \
2069           "MaxRAM / MaxRAMFraction")                                        \
2070                                                                             \
2071   product(uintx, MaxRAMFraction, 4,                                         \
2072           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2073           "size")                                                           \
2074                                                                             \
2075   product(uintx, DefaultMaxRAMFraction, 4,                                  \
2076           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2077           "size; deprecated: to be renamed to MaxRAMFraction")              \
2078                                                                             \
2079   product(uintx, MinRAMFraction, 2,                                         \
2080           "Minimum fraction (1/n) of real memory used for maxmimum heap "   \
2081           "size on systems with small physical memory size")                \
2082                                                                             \
2083   product(uintx, InitialRAMFraction, 64,                                    \
2084           "Fraction (1/n) of real memory used for initial heap size")       \
2085                                                                             \
2086   develop(uintx, MaxVirtMemFraction, 2,                                     \
2087           "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2088           "determining maximum heap size")                                  \
2089                                                                             \
2090   product(bool, UseAutoGCSelectPolicy, false,                               \
2091           "Use automatic collection selection policy")                      \
2092                                                                             \
2093   product(uintx, AutoGCSelectPauseMillis, 5000,                             \
2094           "Automatic GC selection pause threshold in milliseconds")         \
2095                                                                             \
2096   product(bool, UseAdaptiveSizePolicy, true,                                \
2097           "Use adaptive generation sizing policies")                        \
2098                                                                             \
2099   product(bool, UsePSAdaptiveSurvivorSizePolicy, true,                      \
2100           "Use adaptive survivor sizing policies")                          \
2101                                                                             \
2102   product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true,     \
2103           "Use adaptive young-old sizing policies at minor collections")    \
2104                                                                             \
2105   product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true,     \
2106           "Use adaptive young-old sizing policies at major collections")    \
2107                                                                             \
2108   product(bool, UseAdaptiveSizePolicyWithSystemGC, false,                   \
2109           "Include statistics from System.gc() for adaptive size policy")   \
2110                                                                             \
2111   product(bool, UseAdaptiveGCBoundary, false,                               \
2112           "Allow young-old boundary to move")                               \
2113                                                                             \
2114   develop(bool, TraceAdaptiveGCBoundary, false,                             \
2115           "Trace young-old boundary moves")                                 \
2116                                                                             \
2117   develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1,             \
2118           "Resize the virtual spaces of the young or old generations")      \
2119                                                                             \
2120   product(uintx, AdaptiveSizeThroughPutPolicy, 0,                           \
2121           "Policy for changing generation size for throughput goals")       \
2122                                                                             \
2123   product(uintx, AdaptiveSizePausePolicy, 0,                                \
2124           "Policy for changing generation size for pause goals")            \
2125                                                                             \
2126   develop(bool, PSAdjustTenuredGenForMinorPause, false,                     \
2127           "Adjust tenured generation to achieve a minor pause goal")        \
2128                                                                             \
2129   develop(bool, PSAdjustYoungGenForMajorPause, false,                       \
2130           "Adjust young generation to achieve a major pause goal")          \
2131                                                                             \
2132   product(uintx, AdaptiveSizePolicyInitializingSteps, 20,                   \
2133           "Number of steps where heuristics is used before data is used")   \
2134                                                                             \
2135   develop(uintx, AdaptiveSizePolicyReadyThreshold, 5,                       \
2136           "Number of collections before the adaptive sizing is started")    \
2137                                                                             \
2138   product(uintx, AdaptiveSizePolicyOutputInterval, 0,                       \
2139           "Collection interval for printing information; zero means never") \
2140                                                                             \
2141   product(bool, UseAdaptiveSizePolicyFootprintGoal, true,                   \
2142           "Use adaptive minimum footprint as a goal")                       \
2143                                                                             \
2144   product(uintx, AdaptiveSizePolicyWeight, 10,                              \
2145           "Weight given to exponential resizing, between 0 and 100")        \
2146                                                                             \
2147   product(uintx, AdaptiveTimeWeight,       25,                              \
2148           "Weight given to time in adaptive policy, between 0 and 100")     \
2149                                                                             \
2150   product(uintx, PausePadding, 1,                                           \
2151           "How much buffer to keep for pause time")                         \
2152                                                                             \
2153   product(uintx, PromotedPadding, 3,                                        \
2154           "How much buffer to keep for promotion failure")                  \
2155                                                                             \
2156   product(uintx, SurvivorPadding, 3,                                        \
2157           "How much buffer to keep for survivor overflow")                  \
2158                                                                             \
2159   product(uintx, ThresholdTolerance, 10,                                    \
2160           "Allowed collection cost difference between generations")         \
2161                                                                             \
2162   product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50,                \
2163           "If collection costs are within margin, reduce both by full "     \
2164           "delta")                                                          \
2165                                                                             \
2166   product(uintx, YoungGenerationSizeIncrement, 20,                          \
2167           "Adaptive size percentage change in young generation")            \
2168                                                                             \
2169   product(uintx, YoungGenerationSizeSupplement, 80,                         \
2170           "Supplement to YoungedGenerationSizeIncrement used at startup")   \
2171                                                                             \
2172   product(uintx, YoungGenerationSizeSupplementDecay, 8,                     \
2173           "Decay factor to YoungedGenerationSizeSupplement")                \
2174                                                                             \
2175   product(uintx, TenuredGenerationSizeIncrement, 20,                        \
2176           "Adaptive size percentage change in tenured generation")          \
2177                                                                             \
2178   product(uintx, TenuredGenerationSizeSupplement, 80,                       \
2179           "Supplement to TenuredGenerationSizeIncrement used at startup")   \
2180                                                                             \
2181   product(uintx, TenuredGenerationSizeSupplementDecay, 2,                   \
2182           "Decay factor to TenuredGenerationSizeIncrement")                 \
2183                                                                             \
2184   product(uintx, MaxGCPauseMillis, max_uintx,                               \
2185           "Adaptive size policy maximum GC pause time goal in millisecond, "\
2186           "or (G1 Only) the maximum GC time per MMU time slice")            \
2187                                                                             \
2188   product(uintx, GCPauseIntervalMillis, 0,                                  \
2189           "Time slice for MMU specification")                               \
2190                                                                             \
2191   product(uintx, MaxGCMinorPauseMillis, max_uintx,                          \
2192           "Adaptive size policy maximum GC minor pause time goal "          \
2193           "in millisecond")                                                 \
2194                                                                             \
2195   product(uintx, GCTimeRatio, 99,                                           \
2196           "Adaptive size policy application time to GC time ratio")         \
2197                                                                             \
2198   product(uintx, AdaptiveSizeDecrementScaleFactor, 4,                       \
2199           "Adaptive size scale down factor for shrinking")                  \
2200                                                                             \
2201   product(bool, UseAdaptiveSizeDecayMajorGCCost, true,                      \
2202           "Adaptive size decays the major cost for long major intervals")   \
2203                                                                             \
2204   product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10,                     \
2205           "Time scale over which major costs decay")                        \
2206                                                                             \
2207   product(uintx, MinSurvivorRatio, 3,                                       \
2208           "Minimum ratio of young generation/survivor space size")          \
2209                                                                             \
2210   product(uintx, InitialSurvivorRatio, 8,                                   \
2211           "Initial ratio of young generation/survivor space size")          \
2212                                                                             \
2213   product(uintx, BaseFootPrintEstimate, 256*M,                              \
2214           "Estimate of footprint other than Java Heap")                     \
2215                                                                             \
2216   product(bool, UseGCOverheadLimit, true,                                   \
2217           "Use policy to limit of proportion of time spent in GC "          \
2218           "before an OutOfMemory error is thrown")                          \
2219                                                                             \
2220   product(uintx, GCTimeLimit, 98,                                           \
2221           "Limit of the proportion of time spent in GC before "             \
2222           "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)")      \
2223                                                                             \
2224   product(uintx, GCHeapFreeLimit, 2,                                        \
2225           "Minimum percentage of free space after a full GC before an "     \
2226           "OutOfMemoryError is thrown (used with GCTimeLimit)")             \
2227                                                                             \
2228   develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5,                 \
2229           "Number of consecutive collections before gc time limit fires")   \
2230                                                                             \
2231   product(bool, PrintAdaptiveSizePolicy, false,                             \
2232           "Print information about AdaptiveSizePolicy")                     \
2233                                                                             \
2234   product(intx, PrefetchCopyIntervalInBytes, -1,                            \
2235           "How far ahead to prefetch destination area (<= 0 means off)")    \
2236                                                                             \
2237   product(intx, PrefetchScanIntervalInBytes, -1,                            \
2238           "How far ahead to prefetch scan area (<= 0 means off)")           \
2239                                                                             \
2240   product(intx, PrefetchFieldsAhead, -1,                                    \
2241           "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2242                                                                             \
2243   diagnostic(bool, VerifySilently, false,                                   \
2244           "Do not print the verification progress")                         \
2245                                                                             \
2246   diagnostic(bool, VerifyDuringStartup, false,                              \
2247           "Verify memory system before executing any Java code "            \
2248           "during VM initialization")                                       \
2249                                                                             \
2250   diagnostic(bool, VerifyBeforeExit, trueInDebug,                           \
2251           "Verify system before exiting")                                   \
2252                                                                             \
2253   diagnostic(bool, VerifyBeforeGC, false,                                   \
2254           "Verify memory system before GC")                                 \
2255                                                                             \
2256   diagnostic(bool, VerifyAfterGC, false,                                    \
2257           "Verify memory system after GC")                                  \
2258                                                                             \
2259   diagnostic(bool, VerifyDuringGC, false,                                   \
2260           "Verify memory system during GC (between phases)")                \
2261                                                                             \
2262   diagnostic(bool, GCParallelVerificationEnabled, true,                     \
2263           "Enable parallel memory system verification")                     \
2264                                                                             \
2265   diagnostic(bool, DeferInitialCardMark, false,                             \
2266           "When +ReduceInitialCardMarks, explicitly defer any that "        \
2267           "may arise from new_pre_store_barrier")                           \
2268                                                                             \
2269   diagnostic(bool, VerifyRememberedSets, false,                             \
2270           "Verify GC remembered sets")                                      \
2271                                                                             \
2272   diagnostic(bool, VerifyObjectStartArray, true,                            \
2273           "Verify GC object start array if verify before/after")            \
2274                                                                             \
2275   product(bool, DisableExplicitGC, false,                                   \
2276           "Ignore calls to System.gc()")                                    \
2277                                                                             \
2278   notproduct(bool, CheckMemoryInitialization, false,                        \
2279           "Check memory initialization")                                    \
2280                                                                             \
2281   product(bool, CollectGen0First, false,                                    \
2282           "Collect youngest generation before each full GC")                \
2283                                                                             \
2284   diagnostic(bool, BindCMSThreadToCPU, false,                               \
2285           "Bind CMS Thread to CPU if possible")                             \
2286                                                                             \
2287   diagnostic(uintx, CPUForCMSThread, 0,                                     \
2288           "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2289                                                                             \
2290   product(bool, BindGCTaskThreadsToCPUs, false,                             \
2291           "Bind GCTaskThreads to CPUs if possible")                         \
2292                                                                             \
2293   product(bool, UseGCTaskAffinity, false,                                   \
2294           "Use worker affinity when asking for GCTasks")                    \
2295                                                                             \
2296   product(uintx, ProcessDistributionStride, 4,                              \
2297           "Stride through processors when distributing processes")          \
2298                                                                             \
2299   product(uintx, CMSCoordinatorYieldSleepCount, 10,                         \
2300           "Number of times the coordinator GC thread will sleep while "     \
2301           "yielding before giving up and resuming GC")                      \
2302                                                                             \
2303   product(uintx, CMSYieldSleepCount, 0,                                     \
2304           "Number of times a GC thread (minus the coordinator) "            \
2305           "will sleep while yielding before giving up and resuming GC")     \
2306                                                                             \
2307   /* gc tracing */                                                          \
2308   manageable(bool, PrintGC, false,                                          \
2309           "Print message at garbage collection")                            \
2310                                                                             \
2311   manageable(bool, PrintGCDetails, false,                                   \
2312           "Print more details at garbage collection")                       \
2313                                                                             \
2314   manageable(bool, PrintGCDateStamps, false,                                \
2315           "Print date stamps at garbage collection")                        \
2316                                                                             \
2317   manageable(bool, PrintGCTimeStamps, false,                                \
2318           "Print timestamps at garbage collection")                         \
2319                                                                             \
2320   manageable(bool, PrintGCID, false,                                        \
2321           "Print an identifier for each garbage collection")                \
2322                                                                             \
2323   product(bool, PrintGCTaskTimeStamps, false,                               \
2324           "Print timestamps for individual gc worker thread tasks")         \
2325                                                                             \
2326   develop(intx, ConcGCYieldTimeout, 0,                                      \
2327           "If non-zero, assert that GC threads yield within this "          \
2328           "number of milliseconds")                                         \
2329                                                                             \
2330   notproduct(bool, TraceMarkSweep, false,                                   \
2331           "Trace mark sweep")                                               \
2332                                                                             \
2333   product(bool, PrintReferenceGC, false,                                    \
2334           "Print times spent handling reference objects during GC "         \
2335           "(enabled only when PrintGCDetails)")                             \
2336                                                                             \
2337   develop(bool, TraceReferenceGC, false,                                    \
2338           "Trace handling of soft/weak/final/phantom references")           \
2339                                                                             \
2340   develop(bool, TraceFinalizerRegistration, false,                          \
2341           "Trace registration of final references")                         \
2342                                                                             \
2343   notproduct(bool, TraceScavenge, false,                                    \
2344           "Trace scavenge")                                                 \
2345                                                                             \
2346   product(bool, IgnoreEmptyClassPaths, false,                               \
2347           "Ignore empty path elements in -classpath")                       \
2348                                                                             \
2349   product(bool, TraceClassPaths, false,                                     \
2350           "Trace processing of class paths")                                \
2351                                                                             \
2352   product_rw(bool, TraceClassLoading, false,                                \
2353           "Trace all classes loaded")                                       \
2354                                                                             \
2355   product(bool, TraceClassLoadingPreorder, false,                           \
2356           "Trace all classes loaded in order referenced (not loaded)")      \
2357                                                                             \
2358   product_rw(bool, TraceClassUnloading, false,                              \
2359           "Trace unloading of classes")                                     \
2360                                                                             \
2361   product_rw(bool, TraceLoaderConstraints, false,                           \
2362           "Trace loader constraints")                                       \
2363                                                                             \
2364   develop(bool, TraceClassLoaderData, false,                                \
2365           "Trace class loader loader_data lifetime")                        \
2366                                                                             \
2367   product(uintx, InitialBootClassLoaderMetaspaceSize,                       \
2368           NOT_LP64(2200*K) LP64_ONLY(4*M),                                  \
2369           "Initial size of the boot class loader data metaspace")           \
2370                                                                             \
2371   product(bool, TraceGen0Time, false,                                       \
2372           "Trace accumulated time for Gen 0 collection")                    \
2373                                                                             \
2374   product(bool, TraceGen1Time, false,                                       \
2375           "Trace accumulated time for Gen 1 collection")                    \
2376                                                                             \
2377   product(bool, PrintTenuringDistribution, false,                           \
2378           "Print tenuring age information")                                 \
2379                                                                             \
2380   product_rw(bool, PrintHeapAtGC, false,                                    \
2381           "Print heap layout before and after each GC")                     \
2382                                                                             \
2383   product_rw(bool, PrintHeapAtGCExtended, false,                            \
2384           "Print extended information about the layout of the heap "        \
2385           "when -XX:+PrintHeapAtGC is set")                                 \
2386                                                                             \
2387   product(bool, PrintHeapAtSIGBREAK, true,                                  \
2388           "Print heap layout in response to SIGBREAK")                      \
2389                                                                             \
2390   manageable(bool, PrintClassHistogramBeforeFullGC, false,                  \
2391           "Print a class histogram before any major stop-world GC")         \
2392                                                                             \
2393   manageable(bool, PrintClassHistogramAfterFullGC, false,                   \
2394           "Print a class histogram after any major stop-world GC")          \
2395                                                                             \
2396   manageable(bool, PrintClassHistogram, false,                              \
2397           "Print a histogram of class instances")                           \
2398                                                                             \
2399   develop(bool, TraceWorkGang, false,                                       \
2400           "Trace activities of work gangs")                                 \
2401                                                                             \
2402   product(bool, TraceParallelOldGCTasks, false,                             \
2403           "Trace multithreaded GC activity")                                \
2404                                                                             \
2405   develop(bool, TraceBlockOffsetTable, false,                               \
2406           "Print BlockOffsetTable maps")                                    \
2407                                                                             \
2408   develop(bool, TraceCardTableModRefBS, false,                              \
2409           "Print CardTableModRefBS maps")                                   \
2410                                                                             \
2411   develop(bool, TraceGCTaskManager, false,                                  \
2412           "Trace actions of the GC task manager")                           \
2413                                                                             \
2414   develop(bool, TraceGCTaskQueue, false,                                    \
2415           "Trace actions of the GC task queues")                            \
2416                                                                             \
2417   diagnostic(bool, TraceGCTaskThread, false,                                \
2418           "Trace actions of the GC task threads")                           \
2419                                                                             \
2420   product(bool, PrintParallelOldGCPhaseTimes, false,                        \
2421           "Print the time taken by each phase in ParallelOldGC "            \
2422           "(PrintGCDetails must also be enabled)")                          \
2423                                                                             \
2424   develop(bool, TraceParallelOldGCMarkingPhase, false,                      \
2425           "Trace marking phase in ParallelOldGC")                           \
2426                                                                             \
2427   develop(bool, TraceParallelOldGCSummaryPhase, false,                      \
2428           "Trace summary phase in ParallelOldGC")                           \
2429                                                                             \
2430   develop(bool, TraceParallelOldGCCompactionPhase, false,                   \
2431           "Trace compaction phase in ParallelOldGC")                        \
2432                                                                             \
2433   develop(bool, TraceParallelOldGCDensePrefix, false,                       \
2434           "Trace dense prefix computation for ParallelOldGC")               \
2435                                                                             \
2436   develop(bool, IgnoreLibthreadGPFault, false,                              \
2437           "Suppress workaround for libthread GP fault")                     \
2438                                                                             \
2439   product(bool, PrintJNIGCStalls, false,                                    \
2440           "Print diagnostic message when GC is stalled "                    \
2441           "by JNI critical section")                                        \
2442                                                                             \
2443   experimental(double, ObjectCountCutOffPercent, 0.5,                       \
2444           "The percentage of the used heap that the instances of a class "  \
2445           "must occupy for the class to generate a trace event")            \
2446                                                                             \
2447   /* GC log rotation setting */                                             \
2448                                                                             \
2449   product(bool, UseGCLogFileRotation, false,                                \
2450           "Rotate gclog files (for long running applications). It requires "\
2451           "-Xloggc:<filename>")                                             \
2452                                                                             \
2453   product(uintx, NumberOfGCLogFiles, 0,                                     \
2454           "Number of gclog files in rotation "                              \
2455           "(default: 0, no rotation)")                                      \
2456                                                                             \
2457   product(uintx, GCLogFileSize, 8*K,                                        \
2458           "GC log file size, requires UseGCLogFileRotation. "               \
2459           "Set to 0 to only trigger rotation via jcmd")                     \
2460                                                                             \
2461   /* JVMTI heap profiling */                                                \
2462                                                                             \
2463   diagnostic(bool, TraceJVMTIObjectTagging, false,                          \
2464           "Trace JVMTI object tagging calls")                               \
2465                                                                             \
2466   diagnostic(bool, VerifyBeforeIteration, false,                            \
2467           "Verify memory system before JVMTI iteration")                    \
2468                                                                             \
2469   /* compiler interface */                                                  \
2470                                                                             \
2471   develop(bool, CIPrintCompilerName, false,                                 \
2472           "when CIPrint is active, print the name of the active compiler")  \
2473                                                                             \
2474   develop(bool, CIPrintCompileQueue, false,                                 \
2475           "display the contents of the compile queue whenever a "           \
2476           "compilation is enqueued")                                        \
2477                                                                             \
2478   develop(bool, CIPrintRequests, false,                                     \
2479           "display every request for compilation")                          \
2480                                                                             \
2481   product(bool, CITime, false,                                              \
2482           "collect timing information for compilation")                     \
2483                                                                             \
2484   develop(bool, CITimeEach, false,                                          \
2485           "display timing information after each successful compilation")   \
2486                                                                             \
2487   develop(bool, CICountOSR, false,                                          \
2488           "use a separate counter when assigning ids to osr compilations")  \
2489                                                                             \
2490   develop(bool, CICompileNatives, true,                                     \
2491           "compile native methods if supported by the compiler")            \
2492                                                                             \
2493   develop_pd(bool, CICompileOSR,                                            \
2494           "compile on stack replacement methods if supported by the "       \
2495           "compiler")                                                       \
2496                                                                             \
2497   develop(bool, CIPrintMethodCodes, false,                                  \
2498           "print method bytecodes of the compiled code")                    \
2499                                                                             \
2500   develop(bool, CIPrintTypeFlow, false,                                     \
2501           "print the results of ciTypeFlow analysis")                       \
2502                                                                             \
2503   develop(bool, CITraceTypeFlow, false,                                     \
2504           "detailed per-bytecode tracing of ciTypeFlow analysis")           \
2505                                                                             \
2506   develop(intx, OSROnlyBCI, -1,                                             \
2507           "OSR only at this bci.  Negative values mean exclude that bci")   \
2508                                                                             \
2509   /* compiler */                                                            \
2510                                                                             \
2511   product(intx, CICompilerCount, CI_COMPILER_COUNT,                         \
2512           "Number of compiler threads to run")                              \
2513                                                                             \
2514   product(intx, CompilationPolicyChoice, 0,                                 \
2515           "which compilation policy (0/1)")                                 \
2516                                                                             \
2517   develop(bool, UseStackBanging, true,                                      \
2518           "use stack banging for stack overflow checks (required for "      \
2519           "proper StackOverflow handling; disable only to measure cost "    \
2520           "of stackbanging)")                                               \
2521                                                                             \
2522   develop(bool, UseStrictFP, true,                                          \
2523           "use strict fp if modifier strictfp is set")                      \
2524                                                                             \
2525   develop(bool, GenerateSynchronizationCode, true,                          \
2526           "generate locking/unlocking code for synchronized methods and "   \
2527           "monitors")                                                       \
2528                                                                             \
2529   develop(bool, GenerateCompilerNullChecks, true,                           \
2530           "Generate explicit null checks for loads/stores/calls")           \
2531                                                                             \
2532   develop(bool, GenerateRangeChecks, true,                                  \
2533           "Generate range checks for array accesses")                       \
2534                                                                             \
2535   develop_pd(bool, ImplicitNullChecks,                                      \
2536           "Generate code for implicit null checks")                         \
2537                                                                             \
2538   product_pd(bool, TrapBasedNullChecks,                                     \
2539           "Generate code for null checks that uses a cmp and trap "         \
2540           "instruction raising SIGTRAP.  This is only used if an access to" \
2541           "null (+offset) will not raise a SIGSEGV, i.e.,"                  \
2542           "ImplicitNullChecks don't work (PPC64).")                         \
2543                                                                             \
2544   product(bool, PrintSafepointStatistics, false,                            \
2545           "Print statistics about safepoint synchronization")               \
2546                                                                             \
2547   product(intx, PrintSafepointStatisticsCount, 300,                         \
2548           "Total number of safepoint statistics collected "                 \
2549           "before printing them out")                                       \
2550                                                                             \
2551   product(intx, PrintSafepointStatisticsTimeout,  -1,                       \
2552           "Print safepoint statistics only when safepoint takes "           \
2553           "more than PrintSafepointSatisticsTimeout in millis")             \
2554                                                                             \
2555   product(bool, TraceSafepointCleanupTime, false,                           \
2556           "Print the break down of clean up tasks performed during "        \
2557           "safepoint")                                                      \
2558                                                                             \
2559   product(bool, Inline, true,                                               \
2560           "Enable inlining")                                                \
2561                                                                             \
2562   product(bool, ClipInlining, true,                                         \
2563           "Clip inlining if aggregate method exceeds DesiredMethodLimit")   \
2564                                                                             \
2565   develop(bool, UseCHA, true,                                               \
2566           "Enable CHA")                                                     \
2567                                                                             \
2568   product(bool, UseTypeProfile, true,                                       \
2569           "Check interpreter profile for historically monomorphic calls")   \
2570                                                                             \
2571   notproduct(bool, TimeCompiler, false,                                     \
2572           "Time the compiler")                                              \
2573                                                                             \
2574   diagnostic(bool, PrintInlining, false,                                    \
2575           "Print inlining optimizations")                                   \
2576                                                                             \
2577   product(bool, UsePopCountInstruction, false,                              \
2578           "Use population count instruction")                               \
2579                                                                             \
2580   develop(bool, EagerInitialization, false,                                 \
2581           "Eagerly initialize classes if possible")                         \
2582                                                                             \
2583   develop(bool, TraceMethodReplacement, false,                              \
2584           "Print when methods are replaced do to recompilation")            \
2585                                                                             \
2586   develop(bool, PrintMethodFlushing, false,                                 \
2587           "Print the nmethods being flushed")                               \
2588                                                                             \
2589   diagnostic(bool, PrintMethodFlushingStatistics, false,                    \
2590           "print statistics about method flushing")                         \
2591                                                                             \
2592   develop(bool, UseRelocIndex, false,                                       \
2593           "Use an index to speed random access to relocations")             \
2594                                                                             \
2595   develop(bool, StressCodeBuffers, false,                                   \
2596           "Exercise code buffer expansion and other rare state changes")    \
2597                                                                             \
2598   diagnostic(bool, DebugNonSafepoints, trueInDebug,                         \
2599           "Generate extra debugging information for non-safepoints in "     \
2600           "nmethods")                                                       \
2601                                                                             \
2602   product(bool, PrintVMOptions, false,                                      \
2603           "Print flags that appeared on the command line")                  \
2604                                                                             \
2605   product(bool, IgnoreUnrecognizedVMOptions, false,                         \
2606           "Ignore unrecognized VM options")                                 \
2607                                                                             \
2608   product(bool, PrintCommandLineFlags, false,                               \
2609           "Print flags specified on command line or set by ergonomics")     \
2610                                                                             \
2611   product(bool, PrintFlagsInitial, false,                                   \
2612           "Print all VM flags before argument processing and exit VM")      \
2613                                                                             \
2614   product(bool, PrintFlagsFinal, false,                                     \
2615           "Print all VM flags after argument and ergonomic processing")     \
2616                                                                             \
2617   notproduct(bool, PrintFlagsWithComments, false,                           \
2618           "Print all VM flags with default values and descriptions and "    \
2619           "exit")                                                           \
2620                                                                             \
2621   diagnostic(bool, SerializeVMOutput, true,                                 \
2622           "Use a mutex to serialize output to tty and LogFile")             \
2623                                                                             \
2624   diagnostic(bool, DisplayVMOutput, true,                                   \
2625           "Display all VM output on the tty, independently of LogVMOutput") \
2626                                                                             \
2627   diagnostic(bool, LogVMOutput, false,                                      \
2628           "Save VM output to LogFile")                                      \
2629                                                                             \
2630   diagnostic(ccstr, LogFile, NULL,                                          \
2631           "If LogVMOutput or LogCompilation is on, save VM output to "      \
2632           "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2633                                                                             \
2634   product(ccstr, ErrorFile, NULL,                                           \
2635           "If an error occurs, save the error data to this file "           \
2636           "[default: ./hs_err_pid%p.log] (%p replaced with pid)")           \
2637                                                                             \
2638   product(bool, DisplayVMOutputToStderr, false,                             \
2639           "If DisplayVMOutput is true, display all VM output to stderr")    \
2640                                                                             \
2641   product(bool, DisplayVMOutputToStdout, false,                             \
2642           "If DisplayVMOutput is true, display all VM output to stdout")    \
2643                                                                             \
2644   product(bool, UseHeavyMonitors, false,                                    \
2645           "use heavyweight instead of lightweight Java monitors")           \
2646                                                                             \
2647   product(bool, PrintStringTableStatistics, false,                          \
2648           "print statistics about the StringTable and SymbolTable")         \
2649                                                                             \
2650   diagnostic(bool, VerifyStringTableAtExit, false,                          \
2651           "verify StringTable contents at exit")                            \
2652                                                                             \
2653   notproduct(bool, PrintSymbolTableSizeHistogram, false,                    \
2654           "print histogram of the symbol table")                            \
2655                                                                             \
2656   notproduct(bool, ExitVMOnVerifyError, false,                              \
2657           "standard exit from VM if bytecode verify error "                 \
2658           "(only in debug mode)")                                           \
2659                                                                             \
2660   notproduct(ccstr, AbortVMOnException, NULL,                               \
2661           "Call fatal if this exception is thrown.  Example: "              \
2662           "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2663                                                                             \
2664   notproduct(ccstr, AbortVMOnExceptionMessage, NULL,                        \
2665           "Call fatal if the exception pointed by AbortVMOnException "      \
2666           "has this message")                                               \
2667                                                                             \
2668   develop(bool, DebugVtables, false,                                        \
2669           "add debugging code to vtable dispatch")                          \
2670                                                                             \
2671   develop(bool, PrintVtables, false,                                        \
2672           "print vtables when printing klass")                              \
2673                                                                             \
2674   notproduct(bool, PrintVtableStats, false,                                 \
2675           "print vtables stats at end of run")                              \
2676                                                                             \
2677   develop(bool, TraceCreateZombies, false,                                  \
2678           "trace creation of zombie nmethods")                              \
2679                                                                             \
2680   notproduct(bool, IgnoreLockingAssertions, false,                          \
2681           "disable locking assertions (for speed)")                         \
2682                                                                             \
2683   product(bool, RangeCheckElimination, true,                                \
2684           "Eliminate range checks")                                         \
2685                                                                             \
2686   develop_pd(bool, UncommonNullCast,                                        \
2687           "track occurrences of null in casts; adjust compiler tactics")    \
2688                                                                             \
2689   develop(bool, TypeProfileCasts,  true,                                    \
2690           "treat casts like calls for purposes of type profiling")          \
2691                                                                             \
2692   develop(bool, DelayCompilationDuringStartup, true,                        \
2693           "Delay invoking the compiler until main application class is "    \
2694           "loaded")                                                         \
2695                                                                             \
2696   develop(bool, CompileTheWorld, false,                                     \
2697           "Compile all methods in all classes in bootstrap class path "     \
2698           "(stress test)")                                                  \
2699                                                                             \
2700   develop(bool, CompileTheWorldPreloadClasses, true,                        \
2701           "Preload all classes used by a class before start loading")       \
2702                                                                             \
2703   notproduct(intx, CompileTheWorldSafepointInterval, 100,                   \
2704           "Force a safepoint every n compiles so sweeper can keep up")      \
2705                                                                             \
2706   develop(bool, FillDelaySlots, true,                                       \
2707           "Fill delay slots (on SPARC only)")                               \
2708                                                                             \
2709   develop(bool, TimeLivenessAnalysis, false,                                \
2710           "Time computation of bytecode liveness analysis")                 \
2711                                                                             \
2712   develop(bool, TraceLivenessGen, false,                                    \
2713           "Trace the generation of liveness analysis information")          \
2714                                                                             \
2715   notproduct(bool, TraceLivenessQuery, false,                               \
2716           "Trace queries of liveness analysis information")                 \
2717                                                                             \
2718   notproduct(bool, CollectIndexSetStatistics, false,                        \
2719           "Collect information about IndexSets")                            \
2720                                                                             \
2721   develop(bool, UseLoopSafepoints, true,                                    \
2722           "Generate Safepoint nodes in every loop")                         \
2723                                                                             \
2724   develop(intx, FastAllocateSizeLimit, 128*K,                               \
2725           /* Note:  This value is zero mod 1<<13 for a cheap sparc set. */  \
2726           "Inline allocations larger than this in doublewords must go slow")\
2727                                                                             \
2728   product(bool, AggressiveOpts, false,                                      \
2729           "Enable aggressive optimizations - see arguments.cpp")            \
2730                                                                             \
2731   product_pd(uintx, TypeProfileLevel,                                       \
2732           "=XYZ, with Z: Type profiling of arguments at call; "             \
2733                      "Y: Type profiling of return value at call; "          \
2734                      "X: Type profiling of parameters to methods; "         \
2735           "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods")             \
2736                                                                             \
2737   product(intx, TypeProfileArgsLimit,     2,                                \
2738           "max number of call arguments to consider for type profiling")    \
2739                                                                             \
2740   product(intx, TypeProfileParmsLimit,    2,                                \
2741           "max number of incoming parameters to consider for type profiling"\
2742           ", -1 for all")                                                   \
2743                                                                             \
2744   /* statistics */                                                          \
2745   develop(bool, CountCompiledCalls, false,                                  \
2746           "Count method invocations")                                       \
2747                                                                             \
2748   notproduct(bool, CountRuntimeCalls, false,                                \
2749           "Count VM runtime calls")                                         \
2750                                                                             \
2751   develop(bool, CountJNICalls, false,                                       \
2752           "Count jni method invocations")                                   \
2753                                                                             \
2754   notproduct(bool, CountJVMCalls, false,                                    \
2755           "Count jvm method invocations")                                   \
2756                                                                             \
2757   notproduct(bool, CountRemovableExceptions, false,                         \
2758           "Count exceptions that could be replaced by branches due to "     \
2759           "inlining")                                                       \
2760                                                                             \
2761   notproduct(bool, ICMissHistogram, false,                                  \
2762           "Produce histogram of IC misses")                                 \
2763                                                                             \
2764   notproduct(bool, PrintClassStatistics, false,                             \
2765           "Print class statistics at end of run")                           \
2766                                                                             \
2767   notproduct(bool, PrintMethodStatistics, false,                            \
2768           "Print method statistics at end of run")                          \
2769                                                                             \
2770   /* interpreter */                                                         \
2771   develop(bool, ClearInterpreterLocals, false,                              \
2772           "Always clear local variables of interpreter activations upon "   \
2773           "entry")                                                          \
2774                                                                             \
2775   product_pd(bool, RewriteBytecodes,                                        \
2776           "Allow rewriting of bytecodes (bytecodes are not immutable)")     \
2777                                                                             \
2778   product_pd(bool, RewriteFrequentPairs,                                    \
2779           "Rewrite frequently used bytecode pairs into a single bytecode")  \
2780                                                                             \
2781   diagnostic(bool, PrintInterpreter, false,                                 \
2782           "Print the generated interpreter code")                           \
2783                                                                             \
2784   product(bool, UseInterpreter, true,                                       \
2785           "Use interpreter for non-compiled methods")                       \
2786                                                                             \
2787   develop(bool, UseFastSignatureHandlers, true,                             \
2788           "Use fast signature handlers for native calls")                   \
2789                                                                             \
2790   product(bool, UseLoopCounter, true,                                       \
2791           "Increment invocation counter on backward branch")                \
2792                                                                             \
2793   product(bool, UseFastEmptyMethods, true,                                  \
2794           "Use fast method entry code for empty methods")                   \
2795                                                                             \
2796   product(bool, UseFastAccessorMethods, true,                               \
2797           "Use fast method entry code for accessor methods")                \
2798                                                                             \
2799   product_pd(bool, UseOnStackReplacement,                                   \
2800           "Use on stack replacement, calls runtime if invoc. counter "      \
2801           "overflows in loop")                                              \
2802                                                                             \
2803   notproduct(bool, TraceOnStackReplacement, false,                          \
2804           "Trace on stack replacement")                                     \
2805                                                                             \
2806   product_pd(bool, PreferInterpreterNativeStubs,                            \
2807           "Use always interpreter stubs for native methods invoked via "    \
2808           "interpreter")                                                    \
2809                                                                             \
2810   develop(bool, CountBytecodes, false,                                      \
2811           "Count number of bytecodes executed")                             \
2812                                                                             \
2813   develop(bool, PrintBytecodeHistogram, false,                              \
2814           "Print histogram of the executed bytecodes")                      \
2815                                                                             \
2816   develop(bool, PrintBytecodePairHistogram, false,                          \
2817           "Print histogram of the executed bytecode pairs")                 \
2818                                                                             \
2819   diagnostic(bool, PrintSignatureHandlers, false,                           \
2820           "Print code generated for native method signature handlers")      \
2821                                                                             \
2822   develop(bool, VerifyOops, false,                                          \
2823           "Do plausibility checks for oops")                                \
2824                                                                             \
2825   develop(bool, CheckUnhandledOops, false,                                  \
2826           "Check for unhandled oops in VM code")                            \
2827                                                                             \
2828   develop(bool, VerifyJNIFields, trueInDebug,                               \
2829           "Verify jfieldIDs for instance fields")                           \
2830                                                                             \
2831   notproduct(bool, VerifyJNIEnvThread, false,                               \
2832           "Verify JNIEnv.thread == Thread::current() when entering VM "     \
2833           "from JNI")                                                       \
2834                                                                             \
2835   develop(bool, VerifyFPU, false,                                           \
2836           "Verify FPU state (check for NaN's, etc.)")                       \
2837                                                                             \
2838   develop(bool, VerifyThread, false,                                        \
2839           "Watch the thread register for corruption (SPARC only)")          \
2840                                                                             \
2841   develop(bool, VerifyActivationFrameSize, false,                           \
2842           "Verify that activation frame didn't become smaller than its "    \
2843           "minimal size")                                                   \
2844                                                                             \
2845   develop(bool, TraceFrequencyInlining, false,                              \
2846           "Trace frequency based inlining")                                 \
2847                                                                             \
2848   develop_pd(bool, InlineIntrinsics,                                        \
2849           "Inline intrinsics that can be statically resolved")              \
2850                                                                             \
2851   product_pd(bool, ProfileInterpreter,                                      \
2852           "Profile at the bytecode level during interpretation")            \
2853                                                                             \
2854   develop(bool, TraceProfileInterpreter, false,                             \
2855           "Trace profiling at the bytecode level during interpretation. "   \
2856           "This outputs the profiling information collected to improve "    \
2857           "jit compilation.")                                               \
2858                                                                             \
2859   develop_pd(bool, ProfileTraps,                                            \
2860           "Profile deoptimization traps at the bytecode level")             \
2861                                                                             \
2862   product(intx, ProfileMaturityPercentage, 20,                              \
2863           "number of method invocations/branches (expressed as % of "       \
2864           "CompileThreshold) before using the method's profile")            \
2865                                                                             \
2866   develop(bool, PrintMethodData, false,                                     \
2867           "Print the results of +ProfileInterpreter at end of run")         \
2868                                                                             \
2869   develop(bool, VerifyDataPointer, trueInDebug,                             \
2870           "Verify the method data pointer during interpreter profiling")    \
2871                                                                             \
2872   develop(bool, VerifyCompiledCode, false,                                  \
2873           "Include miscellaneous runtime verifications in nmethod code; "   \
2874           "default off because it disturbs nmethod size heuristics")        \
2875                                                                             \
2876   notproduct(bool, CrashGCForDumpingJavaThread, false,                      \
2877           "Manually make GC thread crash then dump java stack trace;  "     \
2878           "Test only")                                                      \
2879                                                                             \
2880   /* compilation */                                                         \
2881   product(bool, UseCompiler, true,                                          \
2882           "Use Just-In-Time compilation")                                   \
2883                                                                             \
2884   develop(bool, TraceCompilationPolicy, false,                              \
2885           "Trace compilation policy")                                       \
2886                                                                             \
2887   develop(bool, TimeCompilationPolicy, false,                               \
2888           "Time the compilation policy")                                    \
2889                                                                             \
2890   product(bool, UseCounterDecay, true,                                      \
2891           "Adjust recompilation counters")                                  \
2892                                                                             \
2893   develop(intx, CounterHalfLifeTime,    30,                                 \
2894           "Half-life time of invocation counters (in seconds)")             \
2895                                                                             \
2896   develop(intx, CounterDecayMinIntervalLength,   500,                       \
2897           "The minimum interval (in milliseconds) between invocation of "   \
2898           "CounterDecay")                                                   \
2899                                                                             \
2900   product(bool, AlwaysCompileLoopMethods, false,                            \
2901           "When using recompilation, never interpret methods "              \
2902           "containing loops")                                               \
2903                                                                             \
2904   product(bool, DontCompileHugeMethods, true,                               \
2905           "Do not compile methods > HugeMethodLimit")                       \
2906                                                                             \
2907   /* Bytecode escape analysis estimation. */                                \
2908   product(bool, EstimateArgEscape, true,                                    \
2909           "Analyze bytecodes to estimate escape state of arguments")        \
2910                                                                             \
2911   product(intx, BCEATraceLevel, 0,                                          \
2912           "How much tracing to do of bytecode escape analysis estimates")   \
2913                                                                             \
2914   product(intx, MaxBCEAEstimateLevel, 5,                                    \
2915           "Maximum number of nested calls that are analyzed by BC EA")      \
2916                                                                             \
2917   product(intx, MaxBCEAEstimateSize, 150,                                   \
2918           "Maximum bytecode size of a method to be analyzed by BC EA")      \
2919                                                                             \
2920   product(intx,  AllocatePrefetchStyle, 1,                                  \
2921           "0 = no prefetch, "                                               \
2922           "1 = prefetch instructions for each allocation, "                 \
2923           "2 = use TLAB watermark to gate allocation prefetch, "            \
2924           "3 = use BIS instruction on Sparc for allocation prefetch")       \
2925                                                                             \
2926   product(intx,  AllocatePrefetchDistance, -1,                              \
2927           "Distance to prefetch ahead of allocation pointer")               \
2928                                                                             \
2929   product(intx,  AllocatePrefetchLines, 3,                                  \
2930           "Number of lines to prefetch ahead of array allocation pointer")  \
2931                                                                             \
2932   product(intx,  AllocateInstancePrefetchLines, 1,                          \
2933           "Number of lines to prefetch ahead of instance allocation "       \
2934           "pointer")                                                        \
2935                                                                             \
2936   product(intx,  AllocatePrefetchStepSize, 16,                              \
2937           "Step size in bytes of sequential prefetch instructions")         \
2938                                                                             \
2939   product(intx,  AllocatePrefetchInstr, 0,                                  \
2940           "Prefetch instruction to prefetch ahead of allocation pointer")   \
2941                                                                             \
2942   /* deoptimization */                                                      \
2943   develop(bool, TraceDeoptimization, false,                                 \
2944           "Trace deoptimization")                                           \
2945                                                                             \
2946   develop(bool, DebugDeoptimization, false,                                 \
2947           "Tracing various information while debugging deoptimization")     \
2948                                                                             \
2949   product(intx, SelfDestructTimer, 0,                                       \
2950           "Will cause VM to terminate after a given time (in minutes) "     \
2951           "(0 means off)")                                                  \
2952                                                                             \
2953   product(intx, MaxJavaStackTraceDepth, 1024,                               \
2954           "The maximum number of lines in the stack trace for Java "        \
2955           "exceptions (0 means all)")                                       \
2956                                                                             \
2957   NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000,          \
2958           "Guarantee a safepoint (at least) every so many milliseconds "    \
2959           "(0 means none)"))                                                \
2960                                                                             \
2961   EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0,               \
2962           "Guarantee a safepoint (at least) every so many milliseconds "    \
2963           "(0 means none)"))                                                \
2964                                                                             \
2965   product(intx, SafepointTimeoutDelay, 10000,                               \
2966           "Delay in milliseconds for option SafepointTimeout")              \
2967                                                                             \
2968   product(intx, NmethodSweepFraction, 16,                                   \
2969           "Number of invocations of sweeper to cover all nmethods")         \
2970                                                                             \
2971   product(intx, NmethodSweepCheckInterval, 5,                               \
2972           "Compilers wake up every n seconds to possibly sweep nmethods")   \
2973                                                                             \
2974   product(intx, NmethodSweepActivity, 10,                                   \
2975           "Removes cold nmethods from code cache if > 0. Higher values "    \
2976           "result in more aggressive sweeping")                             \
2977                                                                             \
2978   notproduct(bool, LogSweeper, false,                                       \
2979           "Keep a ring buffer of sweeper activity")                         \
2980                                                                             \
2981   notproduct(intx, SweeperLogEntries, 1024,                                 \
2982           "Number of records in the ring buffer of sweeper activity")       \
2983                                                                             \
2984   notproduct(intx, MemProfilingInterval, 500,                               \
2985           "Time between each invocation of the MemProfiler")                \
2986                                                                             \
2987   develop(intx, MallocCatchPtr, -1,                                         \
2988           "Hit breakpoint when mallocing/freeing this pointer")             \
2989                                                                             \
2990   notproduct(intx, AssertRepeat, 1,                                         \
2991           "number of times to evaluate expression in assert "               \
2992           "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2993                                                                             \
2994   notproduct(ccstrlist, SuppressErrorAt, "",                                \
2995           "List of assertions (file:line) to muzzle")                       \
2996                                                                             \
2997   notproduct(uintx, HandleAllocationLimit, 1024,                            \
2998           "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2999           "is used")                                                        \
3000                                                                             \
3001   develop(uintx, TotalHandleAllocationLimit, 1024,                          \
3002           "Threshold for total handle allocation when "                     \
3003           "+TraceHandleAllocation is used")                                 \
3004                                                                             \
3005   develop(intx, StackPrintLimit, 100,                                       \
3006           "number of stack frames to print in VM-level stack dump")         \
3007                                                                             \
3008   notproduct(intx, MaxElementPrintSize, 256,                                \
3009           "maximum number of elements to print")                            \
3010                                                                             \
3011   notproduct(intx, MaxSubklassPrintSize, 4,                                 \
3012           "maximum number of subklasses to print when printing klass")      \
3013                                                                             \
3014   product(intx, MaxInlineLevel, 9,                                          \
3015           "maximum number of nested calls that are inlined")                \
3016                                                                             \
3017   product(intx, MaxRecursiveInlineLevel, 1,                                 \
3018           "maximum number of nested recursive calls that are inlined")      \
3019                                                                             \
3020   develop(intx, MaxForceInlineLevel, 100,                                   \
3021           "maximum number of nested calls that are forced for inlining "    \
3022           "(using CompilerOracle or marked w/ @ForceInline)")               \
3023                                                                             \
3024   product_pd(intx, InlineSmallCode,                                         \
3025           "Only inline already compiled methods if their code size is "     \
3026           "less than this")                                                 \
3027                                                                             \
3028   product(intx, MaxInlineSize, 35,                                          \
3029           "The maximum bytecode size of a method to be inlined")            \
3030                                                                             \
3031   product_pd(intx, FreqInlineSize,                                          \
3032           "The maximum bytecode size of a frequent method to be inlined")   \
3033                                                                             \
3034   product(intx, MaxTrivialSize, 6,                                          \
3035           "The maximum bytecode size of a trivial method to be inlined")    \
3036                                                                             \
3037   product(intx, MinInliningThreshold, 250,                                  \
3038           "The minimum invocation count a method needs to have to be "      \
3039           "inlined")                                                        \
3040                                                                             \
3041   develop(intx, MethodHistogramCutoff, 100,                                 \
3042           "The cutoff value for method invocation histogram (+CountCalls)") \
3043                                                                             \
3044   develop(intx, ProfilerNumberOfInterpretedMethods, 25,                     \
3045           "Number of interpreted methods to show in profile")               \
3046                                                                             \
3047   develop(intx, ProfilerNumberOfCompiledMethods, 25,                        \
3048           "Number of compiled methods to show in profile")                  \
3049                                                                             \
3050   develop(intx, ProfilerNumberOfStubMethods, 25,                            \
3051           "Number of stub methods to show in profile")                      \
3052                                                                             \
3053   develop(intx, ProfilerNumberOfRuntimeStubNodes, 25,                       \
3054           "Number of runtime stub nodes to show in profile")                \
3055                                                                             \
3056   product(intx, ProfileIntervalsTicks, 100,                                 \
3057           "Number of ticks between printing of interval profile "           \
3058           "(+ProfileIntervals)")                                            \
3059                                                                             \
3060   notproduct(intx, ScavengeALotInterval,     1,                             \
3061           "Interval between which scavenge will occur with +ScavengeALot")  \
3062                                                                             \
3063   notproduct(intx, FullGCALotInterval,     1,                               \
3064           "Interval between which full gc will occur with +FullGCALot")     \
3065                                                                             \
3066   notproduct(intx, FullGCALotStart,     0,                                  \
3067           "For which invocation to start FullGCAlot")                       \
3068                                                                             \
3069   notproduct(intx, FullGCALotDummies,  32*K,                                \
3070           "Dummy object allocated with +FullGCALot, forcing all objects "   \
3071           "to move")                                                        \
3072                                                                             \
3073   develop(intx, DontYieldALotInterval,    10,                               \
3074           "Interval between which yields will be dropped (milliseconds)")   \
3075                                                                             \
3076   develop(intx, MinSleepInterval,     1,                                    \
3077           "Minimum sleep() interval (milliseconds) when "                   \
3078           "ConvertSleepToYield is off (used for Solaris)")                  \
3079                                                                             \
3080   develop(intx, ProfilerPCTickThreshold,    15,                             \
3081           "Number of ticks in a PC buckets to be a hotspot")                \
3082                                                                             \
3083   notproduct(intx, DeoptimizeALotInterval,     5,                           \
3084           "Number of exits until DeoptimizeALot kicks in")                  \
3085                                                                             \
3086   notproduct(intx, ZombieALotInterval,     5,                               \
3087           "Number of exits until ZombieALot kicks in")                      \
3088                                                                             \
3089   diagnostic(intx, MallocVerifyInterval,     0,                             \
3090           "If non-zero, verify C heap after every N calls to "              \
3091           "malloc/realloc/free")                                            \
3092                                                                             \
3093   diagnostic(intx, MallocVerifyStart,     0,                                \
3094           "If non-zero, start verifying C heap after Nth call to "          \
3095           "malloc/realloc/free")                                            \
3096                                                                             \
3097   diagnostic(uintx, MallocMaxTestWords,     0,                              \
3098           "If non-zero, maximum number of words that malloc/realloc can "   \
3099           "allocate (for testing only)")                                    \
3100                                                                             \
3101   product(intx, TypeProfileWidth,     2,                                    \
3102           "Number of receiver types to record in call/cast profile")        \
3103                                                                             \
3104   develop(intx, BciProfileWidth,      2,                                    \
3105           "Number of return bci's to record in ret profile")                \
3106                                                                             \
3107   product(intx, PerMethodRecompilationCutoff, 400,                          \
3108           "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3109                                                                             \
3110   product(intx, PerBytecodeRecompilationCutoff, 200,                        \
3111           "Per-BCI limit on repeated recompilation (-1=>'Inf')")            \
3112                                                                             \
3113   product(intx, PerMethodTrapLimit,  100,                                   \
3114           "Limit on traps (of one kind) in a method (includes inlines)")    \
3115                                                                             \
3116   experimental(intx, PerMethodSpecTrapLimit,  5000,                         \
3117           "Limit on speculative traps (of one kind) in a method (includes inlines)") \
3118                                                                             \
3119   product(intx, PerBytecodeTrapLimit,  4,                                   \
3120           "Limit on traps (of one kind) at a particular BCI")               \
3121                                                                             \
3122   experimental(intx, SpecTrapLimitExtraEntries,  3,                         \
3123           "Extra method data trap entries for speculation")                 \
3124                                                                             \
3125   develop(intx, InlineFrequencyRatio,    20,                                \
3126           "Ratio of call site execution to caller method invocation")       \
3127                                                                             \
3128   develop_pd(intx, InlineFrequencyCount,                                    \
3129           "Count of call site execution necessary to trigger frequent "     \
3130           "inlining")                                                       \
3131                                                                             \
3132   develop(intx, InlineThrowCount,    50,                                    \
3133           "Force inlining of interpreted methods that throw this often")    \
3134                                                                             \
3135   develop(intx, InlineThrowMaxSize,   200,                                  \
3136           "Force inlining of throwing methods smaller than this")           \
3137                                                                             \
3138   develop(intx, ProfilerNodeSize,  1024,                                    \
3139           "Size in K to allocate for the Profile Nodes of each thread")     \
3140                                                                             \
3141   product_pd(intx, PreInflateSpin,                                          \
3142           "Number of times to spin wait before inflation")                  \
3143                                                                             \
3144   /* gc parameters */                                                       \
3145   product(uintx, InitialHeapSize, 0,                                        \
3146           "Initial heap size (in bytes); zero means use ergonomics")        \
3147                                                                             \
3148   product(uintx, MaxHeapSize, ScaleForWordSize(96*M),                       \
3149           "Maximum heap size (in bytes)")                                   \
3150                                                                             \
3151   product(uintx, OldSize, ScaleForWordSize(4*M),                            \
3152           "Initial tenured generation size (in bytes)")                     \
3153                                                                             \
3154   product(uintx, NewSize, ScaleForWordSize(1*M),                            \
3155           "Initial new generation size (in bytes)")                         \
3156                                                                             \
3157   product(uintx, MaxNewSize, max_uintx,                                     \
3158           "Maximum new generation size (in bytes), max_uintx means set "    \
3159           "ergonomically")                                                  \
3160                                                                             \
3161   product(uintx, PretenureSizeThreshold, 0,                                 \
3162           "Maximum size in bytes of objects allocated in DefNew "           \
3163           "generation; zero means no maximum")                              \
3164                                                                             \
3165   product(uintx, TLABSize, 0,                                               \
3166           "Starting TLAB size (in bytes); zero means set ergonomically")    \
3167                                                                             \
3168   product(uintx, MinTLABSize, 2*K,                                          \
3169           "Minimum allowed TLAB size (in bytes)")                           \
3170                                                                             \
3171   product(uintx, TLABAllocationWeight, 35,                                  \
3172           "Allocation averaging weight")                                    \
3173                                                                             \
3174   product(uintx, TLABWasteTargetPercent, 1,                                 \
3175           "Percentage of Eden that can be wasted")                          \
3176                                                                             \
3177   product(uintx, TLABRefillWasteFraction,    64,                            \
3178           "Maximum TLAB waste at a refill (internal fragmentation)")        \
3179                                                                             \
3180   product(uintx, TLABWasteIncrement,    4,                                  \
3181           "Increment allowed waste at slow allocation")                     \
3182                                                                             \
3183   product(uintx, SurvivorRatio, 8,                                          \
3184           "Ratio of eden/survivor space size")                              \
3185                                                                             \
3186   product(uintx, NewRatio, 2,                                               \
3187           "Ratio of old/new generation sizes")                              \
3188                                                                             \
3189   product_pd(uintx, NewSizeThreadIncrease,                                  \
3190           "Additional size added to desired new generation size per "       \
3191           "non-daemon thread (in bytes)")                                   \
3192                                                                             \
3193   product_pd(uintx, MetaspaceSize,                                          \
3194           "Initial size of Metaspaces (in bytes)")                          \
3195                                                                             \
3196   product(uintx, MaxMetaspaceSize, max_uintx,                               \
3197           "Maximum size of Metaspaces (in bytes)")                          \
3198                                                                             \
3199   product(uintx, CompressedClassSpaceSize, 1*G,                             \
3200           "Maximum size of class area in Metaspace when compressed "        \
3201           "class pointers are used")                                        \
3202                                                                             \
3203   manageable(uintx, MinHeapFreeRatio, 40,                                   \
3204           "The minimum percentage of heap free after GC to avoid expansion."\
3205           " For most GCs this applies to the old generation. In G1 and"     \
3206           " ParallelGC it applies to the whole heap.")                      \
3207                                                                             \
3208   manageable(uintx, MaxHeapFreeRatio, 70,                                   \
3209           "The maximum percentage of heap free after GC to avoid shrinking."\
3210           " For most GCs this applies to the old generation. In G1 and"     \
3211           " ParallelGC it applies to the whole heap.")                      \
3212                                                                             \
3213   product(intx, SoftRefLRUPolicyMSPerMB, 1000,                              \
3214           "Number of milliseconds per MB of free space in the heap")        \
3215                                                                             \
3216   product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K),                \
3217           "The minimum change in heap space due to GC (in bytes)")          \
3218                                                                             \
3219   product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K),            \
3220           "The minimum expansion of Metaspace (in bytes)")                  \
3221                                                                             \
3222   product(uintx, MinMetaspaceFreeRatio,    40,                              \
3223           "The minimum percentage of Metaspace free after GC to avoid "     \
3224           "expansion")                                                      \
3225                                                                             \
3226   product(uintx, MaxMetaspaceFreeRatio,    70,                              \
3227           "The maximum percentage of Metaspace free after GC to avoid "     \
3228           "shrinking")                                                      \
3229                                                                             \
3230   product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M),              \
3231           "The maximum expansion of Metaspace without full GC (in bytes)")  \
3232                                                                             \
3233   product(uintx, QueuedAllocationWarningCount, 0,                           \
3234           "Number of times an allocation that queues behind a GC "          \
3235           "will retry before printing a warning")                           \
3236                                                                             \
3237   diagnostic(uintx, VerifyGCStartAt,   0,                                   \
3238           "GC invoke count where +VerifyBefore/AfterGC kicks in")           \
3239                                                                             \
3240   diagnostic(intx, VerifyGCLevel,     0,                                    \
3241           "Generation level at which to start +VerifyBefore/AfterGC")       \
3242                                                                             \
3243   product(uintx, MaxTenuringThreshold,    15,                               \
3244           "Maximum value for tenuring threshold")                           \
3245                                                                             \
3246   product(uintx, InitialTenuringThreshold,    7,                            \
3247           "Initial value for tenuring threshold")                           \
3248                                                                             \
3249   product(uintx, TargetSurvivorRatio,    50,                                \
3250           "Desired percentage of survivor space used after scavenge")       \
3251                                                                             \
3252   product(uintx, MarkSweepDeadRatio,     5,                                 \
3253           "Percentage (0-100) of the old gen allowed as dead wood. "        \
3254           "Serial mark sweep treats this as both the minimum and maximum "  \
3255           "value. "                                                         \
3256           "CMS uses this value only if it falls back to mark sweep. "       \
3257           "Par compact uses a variable scale based on the density of the "  \
3258           "generation and treats this as the maximum value when the heap "  \
3259           "is either completely full or completely empty.  Par compact "    \
3260           "also has a smaller default value; see arguments.cpp.")           \
3261                                                                             \
3262   product(uintx, MarkSweepAlwaysCompactCount,     4,                        \
3263           "How often should we fully compact the heap (ignoring the dead "  \
3264           "space parameters)")                                              \
3265                                                                             \
3266   product(intx, PrintCMSStatistics, 0,                                      \
3267           "Statistics for CMS")                                             \
3268                                                                             \
3269   product(bool, PrintCMSInitiationStatistics, false,                        \
3270           "Statistics for initiating a CMS collection")                     \
3271                                                                             \
3272   product(intx, PrintFLSStatistics, 0,                                      \
3273           "Statistics for CMS' FreeListSpace")                              \
3274                                                                             \
3275   product(intx, PrintFLSCensus, 0,                                          \
3276           "Census for CMS' FreeListSpace")                                  \
3277                                                                             \
3278   develop(uintx, GCExpandToAllocateDelayMillis, 0,                          \
3279           "Delay between expansion and allocation (in milliseconds)")       \
3280                                                                             \
3281   develop(uintx, GCWorkerDelayMillis, 0,                                    \
3282           "Delay in scheduling GC workers (in milliseconds)")               \
3283                                                                             \
3284   product(intx, DeferThrSuspendLoopCount,     4000,                         \
3285           "(Unstable) Number of times to iterate in safepoint loop "        \
3286           "before blocking VM threads ")                                    \
3287                                                                             \
3288   product(intx, DeferPollingPageLoopCount,     -1,                          \
3289           "(Unsafe,Unstable) Number of iterations in safepoint loop "       \
3290           "before changing safepoint polling page to RO ")                  \
3291                                                                             \
3292   product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)")               \
3293                                                                             \
3294   product(bool, PSChunkLargeArrays, true,                                   \
3295           "Process large arrays in chunks")                                 \
3296                                                                             \
3297   product(uintx, GCDrainStackTargetSize, 64,                                \
3298           "Number of entries we will try to leave on the stack "            \
3299           "during parallel gc")                                             \
3300                                                                             \
3301   /* stack parameters */                                                    \
3302   product_pd(intx, StackYellowPages,                                        \
3303           "Number of yellow zone (recoverable overflows) pages")            \
3304                                                                             \
3305   product_pd(intx, StackRedPages,                                           \
3306           "Number of red zone (unrecoverable overflows) pages")             \
3307                                                                             \
3308   product_pd(intx, StackShadowPages,                                        \
3309           "Number of shadow zone (for overflow checking) pages "            \
3310           "this should exceed the depth of the VM and native call stack")   \
3311                                                                             \
3312   product_pd(intx, ThreadStackSize,                                         \
3313           "Thread Stack Size (in Kbytes)")                                  \
3314                                                                             \
3315   product_pd(intx, VMThreadStackSize,                                       \
3316           "Non-Java Thread Stack Size (in Kbytes)")                         \
3317                                                                             \
3318   product_pd(intx, CompilerThreadStackSize,                                 \
3319           "Compiler Thread Stack Size (in Kbytes)")                         \
3320                                                                             \
3321   develop_pd(uintx, JVMInvokeMethodSlack,                                   \
3322           "Stack space (bytes) required for JVM_InvokeMethod to complete")  \
3323                                                                             \
3324   product(uintx, ThreadSafetyMargin, 50*M,                                  \
3325           "Thread safety margin is used on fixed-stack LinuxThreads (on "   \
3326           "Linux/x86 only) to prevent heap-stack collision. Set to 0 to "   \
3327           "disable this feature")                                           \
3328                                                                             \
3329   /* code cache parameters */                                               \
3330   /* ppc64 has large code-entry alignment. */                               \
3331   develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64),                  \
3332           "Code cache segment size (in bytes) - smallest unit of "          \
3333           "allocation")                                                     \
3334                                                                             \
3335   develop_pd(intx, CodeEntryAlignment,                                      \
3336           "Code entry alignment for generated code (in bytes)")             \
3337                                                                             \
3338   product_pd(intx, OptoLoopAlignment,                                       \
3339           "Align inner loops to zero relative to this modulus")             \
3340                                                                             \
3341   product_pd(uintx, InitialCodeCacheSize,                                   \
3342           "Initial code cache size (in bytes)")                             \
3343                                                                             \
3344   develop_pd(uintx, CodeCacheMinimumUseSpace,                               \
3345           "Minimum code cache size (in bytes) required to start VM.")       \
3346                                                                             \
3347   product_pd(uintx, ReservedCodeCacheSize,                                  \
3348           "Reserved code cache size (in bytes) - maximum code cache size")  \
3349                                                                             \
3350   product(uintx, CodeCacheMinimumFreeSpace, 500*K,                          \
3351           "When less than X space left, we stop compiling")                 \
3352                                                                             \
3353   product_pd(uintx, CodeCacheExpansionSize,                                 \
3354           "Code cache expansion size (in bytes)")                           \
3355                                                                             \
3356   develop_pd(uintx, CodeCacheMinBlockLength,                                \
3357           "Minimum number of segments in a code cache block")               \
3358                                                                             \
3359   notproduct(bool, ExitOnFullCodeCache, false,                              \
3360           "Exit the VM if we fill the code cache")                          \
3361                                                                             \
3362   product(bool, UseCodeCacheFlushing, true,                                 \
3363           "Remove cold/old nmethods from the code cache")                   \
3364                                                                             \
3365   /* interpreter debugging */                                               \
3366   develop(intx, BinarySwitchThreshold, 5,                                   \
3367           "Minimal number of lookupswitch entries for rewriting to binary " \
3368           "switch")                                                         \
3369                                                                             \
3370   develop(intx, StopInterpreterAt, 0,                                       \
3371           "Stop interpreter execution at specified bytecode number")        \
3372                                                                             \
3373   develop(intx, TraceBytecodesAt, 0,                                        \
3374           "Trace bytecodes starting with specified bytecode number")        \
3375                                                                             \
3376   /* compiler interface */                                                  \
3377   develop(intx, CIStart, 0,                                                 \
3378           "The id of the first compilation to permit")                      \
3379                                                                             \
3380   develop(intx, CIStop, max_jint,                                           \
3381           "The id of the last compilation to permit")                       \
3382                                                                             \
3383   develop(intx, CIStartOSR, 0,                                              \
3384           "The id of the first osr compilation to permit "                  \
3385           "(CICountOSR must be on)")                                        \
3386                                                                             \
3387   develop(intx, CIStopOSR, max_jint,                                        \
3388           "The id of the last osr compilation to permit "                   \
3389           "(CICountOSR must be on)")                                        \
3390                                                                             \
3391   develop(intx, CIBreakAtOSR, -1,                                           \
3392           "The id of osr compilation to break at")                          \
3393                                                                             \
3394   develop(intx, CIBreakAt, -1,                                              \
3395           "The id of compilation to break at")                              \
3396                                                                             \
3397   product(ccstrlist, CompileOnly, "",                                       \
3398           "List of methods (pkg/class.name) to restrict compilation to")    \
3399                                                                             \
3400   product(ccstr, CompileCommandFile, NULL,                                  \
3401           "Read compiler commands from this file [.hotspot_compiler]")      \
3402                                                                             \
3403   product(ccstrlist, CompileCommand, "",                                    \
3404           "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3405                                                                             \
3406   develop(bool, ReplayCompiles, false,                                      \
3407           "Enable replay of compilations from ReplayDataFile")              \
3408                                                                             \
3409   product(ccstr, ReplayDataFile, NULL,                                      \
3410           "File containing compilation replay information"                  \
3411           "[default: ./replay_pid%p.log] (%p replaced with pid)")           \
3412                                                                             \
3413    product(ccstr, InlineDataFile, NULL,                                     \
3414           "File containing inlining replay information"                     \
3415           "[default: ./inline_pid%p.log] (%p replaced with pid)")           \
3416                                                                             \
3417   develop(intx, ReplaySuppressInitializers, 2,                              \
3418           "Control handling of class initialization during replay: "        \
3419           "0 - don't do anything special; "                                 \
3420           "1 - treat all class initializers as empty; "                     \
3421           "2 - treat class initializers for application classes as empty; " \
3422           "3 - allow all class initializers to run during bootstrap but "   \
3423           "    pretend they are empty after starting replay")               \
3424                                                                             \
3425   develop(bool, ReplayIgnoreInitErrors, false,                              \
3426           "Ignore exceptions thrown during initialization for replay")      \
3427                                                                             \
3428   product(bool, DumpReplayDataOnError, true,                                \
3429           "Record replay data for crashing compiler threads")               \
3430                                                                             \
3431   product(bool, CICompilerCountPerCPU, false,                               \
3432           "1 compiler thread for log(N CPUs)")                              \
3433                                                                             \
3434   develop(intx, CIFireOOMAt,    -1,                                         \
3435           "Fire OutOfMemoryErrors throughout CI for testing the compiler "  \
3436           "(non-negative value throws OOM after this many CI accesses "     \
3437           "in each compile)")                                               \
3438   notproduct(intx, CICrashAt, -1,                                           \
3439           "id of compilation to trigger assert in compiler thread for "     \
3440           "the purpose of testing, e.g. generation of replay data")         \
3441   notproduct(bool, CIObjectFactoryVerify, false,                            \
3442           "enable potentially expensive verification in ciObjectFactory")   \
3443                                                                             \
3444   /* Priorities */                                                          \
3445   product_pd(bool, UseThreadPriorities,  "Use native thread priorities")    \
3446                                                                             \
3447   product(intx, ThreadPriorityPolicy, 0,                                    \
3448           "0 : Normal.                                                     "\
3449           "    VM chooses priorities that are appropriate for normal       "\
3450           "    applications. On Solaris NORM_PRIORITY and above are mapped "\
3451           "    to normal native priority. Java priorities below "           \
3452           "    NORM_PRIORITY map to lower native priority values. On       "\
3453           "    Windows applications are allowed to use higher native       "\
3454           "    priorities. However, with ThreadPriorityPolicy=0, VM will   "\
3455           "    not use the highest possible native priority,               "\
3456           "    THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with     "\
3457           "    system threads. On Linux thread priorities are ignored      "\
3458           "    because the OS does not support static priority in          "\
3459           "    SCHED_OTHER scheduling class which is the only choice for   "\
3460           "    non-root, non-realtime applications.                        "\
3461           "1 : Aggressive.                                                 "\
3462           "    Java thread priorities map over to the entire range of      "\
3463           "    native thread priorities. Higher Java thread priorities map "\
3464           "    to higher native thread priorities. This policy should be   "\
3465           "    used with care, as sometimes it can cause performance       "\
3466           "    degradation in the application and/or the entire system. On "\
3467           "    Linux this policy requires root privilege.")                 \
3468                                                                             \
3469   product(bool, ThreadPriorityVerbose, false,                               \
3470           "Print priority changes")                                         \
3471                                                                             \
3472   product(intx, DefaultThreadPriority, -1,                                  \
3473           "The native priority at which threads run if not elsewhere "      \
3474           "specified (-1 means no change)")                                 \
3475                                                                             \
3476   product(intx, CompilerThreadPriority, -1,                                 \
3477           "The native priority at which compiler threads should run "       \
3478           "(-1 means no change)")                                           \
3479                                                                             \
3480   product(intx, VMThreadPriority, -1,                                       \
3481           "The native priority at which the VM thread should run "          \
3482           "(-1 means no change)")                                           \
3483                                                                             \
3484   product(bool, CompilerThreadHintNoPreempt, true,                          \
3485           "(Solaris only) Give compiler threads an extra quanta")           \
3486                                                                             \
3487   product(bool, VMThreadHintNoPreempt, false,                               \
3488           "(Solaris only) Give VM thread an extra quanta")                  \
3489                                                                             \
3490   product(intx, JavaPriority1_To_OSPriority, -1,                            \
3491           "Map Java priorities to OS priorities")                           \
3492                                                                             \
3493   product(intx, JavaPriority2_To_OSPriority, -1,                            \
3494           "Map Java priorities to OS priorities")                           \
3495                                                                             \
3496   product(intx, JavaPriority3_To_OSPriority, -1,                            \
3497           "Map Java priorities to OS priorities")                           \
3498                                                                             \
3499   product(intx, JavaPriority4_To_OSPriority, -1,                            \
3500           "Map Java priorities to OS priorities")                           \
3501                                                                             \
3502   product(intx, JavaPriority5_To_OSPriority, -1,                            \
3503           "Map Java priorities to OS priorities")                           \
3504                                                                             \
3505   product(intx, JavaPriority6_To_OSPriority, -1,                            \
3506           "Map Java priorities to OS priorities")                           \
3507                                                                             \
3508   product(intx, JavaPriority7_To_OSPriority, -1,                            \
3509           "Map Java priorities to OS priorities")                           \
3510                                                                             \
3511   product(intx, JavaPriority8_To_OSPriority, -1,                            \
3512           "Map Java priorities to OS priorities")                           \
3513                                                                             \
3514   product(intx, JavaPriority9_To_OSPriority, -1,                            \
3515           "Map Java priorities to OS priorities")                           \
3516                                                                             \
3517   product(intx, JavaPriority10_To_OSPriority,-1,                            \
3518           "Map Java priorities to OS priorities")                           \
3519                                                                             \
3520   experimental(bool, UseCriticalJavaThreadPriority, false,                  \
3521           "Java thread priority 10 maps to critical scheduling priority")   \
3522                                                                             \
3523   experimental(bool, UseCriticalCompilerThreadPriority, false,              \
3524           "Compiler thread(s) run at critical scheduling priority")         \
3525                                                                             \
3526   experimental(bool, UseCriticalCMSThreadPriority, false,                   \
3527           "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3528                                                                             \
3529   /* compiler debugging */                                                  \
3530   notproduct(intx, CompileTheWorldStartAt,     1,                           \
3531           "First class to consider when using +CompileTheWorld")            \
3532                                                                             \
3533   notproduct(intx, CompileTheWorldStopAt, max_jint,                         \
3534           "Last class to consider when using +CompileTheWorld")             \
3535                                                                             \
3536   develop(intx, NewCodeParameter,      0,                                   \
3537           "Testing Only: Create a dedicated integer parameter before "      \
3538           "putback")                                                        \
3539                                                                             \
3540   /* new oopmap storage allocation */                                       \
3541   develop(intx, MinOopMapAllocation,     8,                                 \
3542           "Minimum number of OopMap entries in an OopMapSet")               \
3543                                                                             \
3544   /* Background Compilation */                                              \
3545   develop(intx, LongCompileThreshold,     50,                               \
3546           "Used with +TraceLongCompiles")                                   \
3547                                                                             \
3548   product(intx, StarvationMonitorInterval,    200,                          \
3549           "Pause between each check (in milliseconds)")                     \
3550                                                                             \
3551   /* recompilation */                                                       \
3552   product_pd(intx, CompileThreshold,                                        \
3553           "number of interpreted method invocations before (re-)compiling") \
3554                                                                             \
3555   product_pd(intx, BackEdgeThreshold,                                       \
3556           "Interpreter Back edge threshold at which an OSR compilation is " \
3557           "invoked")                                                        \
3558                                                                             \
3559   product(intx, Tier0InvokeNotifyFreqLog, 7,                                \
3560           "Interpreter (tier 0) invocation notification frequency")         \
3561                                                                             \
3562   product(intx, Tier2InvokeNotifyFreqLog, 11,                               \
3563           "C1 without MDO (tier 2) invocation notification frequency")      \
3564                                                                             \
3565   product(intx, Tier3InvokeNotifyFreqLog, 10,                               \
3566           "C1 with MDO profiling (tier 3) invocation notification "         \
3567           "frequency")                                                      \
3568                                                                             \
3569   product(intx, Tier23InlineeNotifyFreqLog, 20,                             \
3570           "Inlinee invocation (tiers 2 and 3) notification frequency")      \
3571                                                                             \
3572   product(intx, Tier0BackedgeNotifyFreqLog, 10,                             \
3573           "Interpreter (tier 0) invocation notification frequency")         \
3574                                                                             \
3575   product(intx, Tier2BackedgeNotifyFreqLog, 14,                             \
3576           "C1 without MDO (tier 2) invocation notification frequency")      \
3577                                                                             \
3578   product(intx, Tier3BackedgeNotifyFreqLog, 13,                             \
3579           "C1 with MDO profiling (tier 3) invocation notification "         \
3580           "frequency")                                                      \
3581                                                                             \
3582   product(intx, Tier2CompileThreshold, 0,                                   \
3583           "threshold at which tier 2 compilation is invoked")               \
3584                                                                             \
3585   product(intx, Tier2BackEdgeThreshold, 0,                                  \
3586           "Back edge threshold at which tier 2 compilation is invoked")     \
3587                                                                             \
3588   product(intx, Tier3InvocationThreshold, 200,                              \
3589           "Compile if number of method invocations crosses this "           \
3590           "threshold")                                                      \
3591                                                                             \
3592   product(intx, Tier3MinInvocationThreshold, 100,                           \
3593           "Minimum invocation to compile at tier 3")                        \
3594                                                                             \
3595   product(intx, Tier3CompileThreshold, 2000,                                \
3596           "Threshold at which tier 3 compilation is invoked (invocation "   \
3597           "minimum must be satisfied")                                      \
3598                                                                             \
3599   product(intx, Tier3BackEdgeThreshold,  60000,                             \
3600           "Back edge threshold at which tier 3 OSR compilation is invoked") \
3601                                                                             \
3602   product(intx, Tier4InvocationThreshold, 5000,                             \
3603           "Compile if number of method invocations crosses this "           \
3604           "threshold")                                                      \
3605                                                                             \
3606   product(intx, Tier4MinInvocationThreshold, 600,                           \
3607           "Minimum invocation to compile at tier 4")                        \
3608                                                                             \
3609   product(intx, Tier4CompileThreshold, 15000,                               \
3610           "Threshold at which tier 4 compilation is invoked (invocation "   \
3611           "minimum must be satisfied")                                      \
3612                                                                             \
3613   product(intx, Tier4BackEdgeThreshold, 40000,                              \
3614           "Back edge threshold at which tier 4 OSR compilation is invoked") \
3615                                                                             \
3616   product(intx, Tier3DelayOn, 5,                                            \
3617           "If C2 queue size grows over this amount per compiler thread "    \
3618           "stop compiling at tier 3 and start compiling at tier 2")         \
3619                                                                             \
3620   product(intx, Tier3DelayOff, 2,                                           \
3621           "If C2 queue size is less than this amount per compiler thread "  \
3622           "allow methods compiled at tier 2 transition to tier 3")          \
3623                                                                             \
3624   product(intx, Tier3LoadFeedback, 5,                                       \
3625           "Tier 3 thresholds will increase twofold when C1 queue size "     \
3626           "reaches this amount per compiler thread")                        \
3627                                                                             \
3628   product(intx, Tier4LoadFeedback, 3,                                       \
3629           "Tier 4 thresholds will increase twofold when C2 queue size "     \
3630           "reaches this amount per compiler thread")                        \
3631                                                                             \
3632   product(intx, TieredCompileTaskTimeout, 50,                               \
3633           "Kill compile task if method was not used within "                \
3634           "given timeout in milliseconds")                                  \
3635                                                                             \
3636   product(intx, TieredStopAtLevel, 4,                                       \
3637           "Stop at given compilation level")                                \
3638                                                                             \
3639   product(intx, Tier0ProfilingStartPercentage, 200,                         \
3640           "Start profiling in interpreter if the counters exceed tier 3 "   \
3641           "thresholds by the specified percentage")                         \
3642                                                                             \
3643   product(uintx, IncreaseFirstTierCompileThresholdAt, 50,                   \
3644           "Increase the compile threshold for C1 compilation if the code "  \
3645           "cache is filled by the specified percentage")                    \
3646                                                                             \
3647   product(intx, TieredRateUpdateMinTime, 1,                                 \
3648           "Minimum rate sampling interval (in milliseconds)")               \
3649                                                                             \
3650   product(intx, TieredRateUpdateMaxTime, 25,                                \
3651           "Maximum rate sampling interval (in milliseconds)")               \
3652                                                                             \
3653   product_pd(bool, TieredCompilation,                                       \
3654           "Enable tiered compilation")                                      \
3655                                                                             \
3656   product(bool, PrintTieredEvents, false,                                   \
3657           "Print tiered events notifications")                              \
3658                                                                             \
3659   product_pd(intx, OnStackReplacePercentage,                                \
3660           "NON_TIERED number of method invocations/branches (expressed as " \
3661           "% of CompileThreshold) before (re-)compiling OSR code")          \
3662                                                                             \
3663   product(intx, InterpreterProfilePercentage, 33,                           \
3664           "NON_TIERED number of method invocations/branches (expressed as " \
3665           "% of CompileThreshold) before profiling in the interpreter")     \
3666                                                                             \
3667   develop(intx, MaxRecompilationSearchLength,    10,                        \
3668           "The maximum number of frames to inspect when searching for "     \
3669           "recompilee")                                                     \
3670                                                                             \
3671   develop(intx, MaxInterpretedSearchLength,     3,                          \
3672           "The maximum number of interpreted frames to skip when searching "\
3673           "for recompilee")                                                 \
3674                                                                             \
3675   develop(intx, DesiredMethodLimit,  8000,                                  \
3676           "The desired maximum method size (in bytecodes) after inlining")  \
3677                                                                             \
3678   develop(intx, HugeMethodLimit,  8000,                                     \
3679           "Don't compile methods larger than this if "                      \
3680           "+DontCompileHugeMethods")                                        \
3681                                                                             \
3682   /* New JDK 1.4 reflection implementation */                               \
3683                                                                             \
3684   develop(bool, UseNewReflection, true,                                     \
3685           "Temporary flag for transition to reflection based on dynamic "   \
3686           "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3687           "JDK, and is unneeded in 1.3 JDK, but marks most places VM "      \
3688           "changes were needed")                                            \
3689                                                                             \
3690   develop(bool, VerifyReflectionBytecodes, false,                           \
3691           "Force verification of 1.4 reflection bytecodes. Does not work "  \
3692           "in situations like that described in 4486457 or for "            \
3693           "constructors generated for serialization, so can not be enabled "\
3694           "in product.")                                                    \
3695                                                                             \
3696   product(bool, ReflectionWrapResolutionErrors, true,                       \
3697           "Temporary flag for transition to AbstractMethodError wrapped "   \
3698           "in InvocationTargetException. See 6531596")                      \
3699                                                                             \
3700   develop(intx, FastSuperclassLimit, 8,                                     \
3701           "Depth of hardwired instanceof accelerator array")                \
3702                                                                             \
3703   /* Properties for Java libraries  */                                      \
3704                                                                             \
3705   product(uintx, MaxDirectMemorySize, 0,                                    \
3706           "Maximum total size of NIO direct-buffer allocations")            \
3707                                                                             \
3708   /* temporary developer defined flags  */                                  \
3709                                                                             \
3710   diagnostic(bool, UseNewCode, false,                                       \
3711           "Testing Only: Use the new version while testing")                \
3712                                                                             \
3713   diagnostic(bool, UseNewCode2, false,                                      \
3714           "Testing Only: Use the new version while testing")                \
3715                                                                             \
3716   diagnostic(bool, UseNewCode3, false,                                      \
3717           "Testing Only: Use the new version while testing")                \
3718                                                                             \
3719   /* flags for performance data collection */                               \
3720                                                                             \
3721   product(bool, UsePerfData, falseInEmbedded,                               \
3722           "Flag to disable jvmstat instrumentation for performance testing "\
3723           "and problem isolation purposes")                                 \
3724                                                                             \
3725   product(bool, PerfDataSaveToFile, false,                                  \
3726           "Save PerfData memory to hsperfdata_<pid> file on exit")          \
3727                                                                             \
3728   product(ccstr, PerfDataSaveFile, NULL,                                    \
3729           "Save PerfData memory to the specified absolute pathname. "       \
3730           "The string %p in the file name (if present) "                    \
3731           "will be replaced by pid")                                        \
3732                                                                             \
3733   product(intx, PerfDataSamplingInterval, 50,                               \
3734           "Data sampling interval (in milliseconds)")                       \
3735                                                                             \
3736   develop(bool, PerfTraceDataCreation, false,                               \
3737           "Trace creation of Performance Data Entries")                     \
3738                                                                             \
3739   develop(bool, PerfTraceMemOps, false,                                     \
3740           "Trace PerfMemory create/attach/detach calls")                    \
3741                                                                             \
3742   product(bool, PerfDisableSharedMem, false,                                \
3743           "Store performance data in standard memory")                      \
3744                                                                             \
3745   product(intx, PerfDataMemorySize, 32*K,                                   \
3746           "Size of performance data memory region. Will be rounded "        \
3747           "up to a multiple of the native os page size.")                   \
3748                                                                             \
3749   product(intx, PerfMaxStringConstLength, 1024,                             \
3750           "Maximum PerfStringConstant string length before truncation")     \
3751                                                                             \
3752   product(bool, PerfAllowAtExitRegistration, false,                         \
3753           "Allow registration of atexit() methods")                         \
3754                                                                             \
3755   product(bool, PerfBypassFileSystemCheck, false,                           \
3756           "Bypass Win32 file system criteria checks (Windows Only)")        \
3757                                                                             \
3758   product(intx, UnguardOnExecutionViolation, 0,                             \
3759           "Unguard page and retry on no-execute fault (Win32 only) "        \
3760           "0=off, 1=conservative, 2=aggressive")                            \
3761                                                                             \
3762   /* Serviceability Support */                                              \
3763                                                                             \
3764   product(bool, ManagementServer, false,                                    \
3765           "Create JMX Management Server")                                   \
3766                                                                             \
3767   product(bool, DisableAttachMechanism, false,                              \
3768           "Disable mechanism that allows tools to attach to this VM")       \
3769                                                                             \
3770   product(bool, StartAttachListener, false,                                 \
3771           "Always start Attach Listener at VM startup")                     \
3772                                                                             \
3773   manageable(bool, PrintConcurrentLocks, false,                             \
3774           "Print java.util.concurrent locks in thread dump")                \
3775                                                                             \
3776   product(bool, TransmitErrorReport, false,                                 \
3777           "Enable error report transmission on erroneous termination")      \
3778                                                                             \
3779   product(ccstr, ErrorReportServer, NULL,                                   \
3780           "Override built-in error report server address")                  \
3781                                                                             \
3782   /* Shared spaces */                                                       \
3783                                                                             \
3784   product(bool, UseSharedSpaces, true,                                      \
3785           "Use shared spaces for metadata")                                 \
3786                                                                             \
3787   product(bool, VerifySharedSpaces, false,                                  \
3788           "Verify shared spaces (false for default archive, true for "      \
3789           "archive specified by -XX:SharedArchiveFile)")                    \
3790                                                                             \
3791   product(bool, RequireSharedSpaces, false,                                 \
3792           "Require shared spaces for metadata")                             \
3793                                                                             \
3794   product(bool, DumpSharedSpaces, false,                                    \
3795           "Special mode: JVM reads a class list, loads classes, builds "    \
3796           "shared spaces, and dumps the shared spaces to a file to be "     \
3797           "used in future JVM runs")                                        \
3798                                                                             \
3799   product(bool, PrintSharedSpaces, false,                                   \
3800           "Print usage of shared spaces")                                   \
3801                                                                             \
3802   product(bool, PrintSharedArchiveAndExit, false,                           \
3803           "Print shared archive file contents")                             \
3804                                                                             \
3805   product(bool, PrintSharedDictionary, false,                               \
3806           "If PrintSharedArchiveAndExit is true, also print the shared "    \
3807           "dictionary")                                                     \
3808                                                                             \
3809   product(uintx, SharedReadWriteSize,  NOT_LP64(12*M) LP64_ONLY(16*M),      \
3810           "Size of read-write space for metadata (in bytes)")               \
3811                                                                             \
3812   product(uintx, SharedReadOnlySize,  NOT_LP64(12*M) LP64_ONLY(16*M),       \
3813           "Size of read-only space for metadata (in bytes)")                \
3814                                                                             \
3815   product(uintx, SharedMiscDataSize,    NOT_LP64(2*M) LP64_ONLY(4*M),       \
3816           "Size of the shared miscellaneous data area (in bytes)")          \
3817                                                                             \
3818   product(uintx, SharedMiscCodeSize,    120*K,                              \
3819           "Size of the shared miscellaneous code area (in bytes)")          \
3820                                                                             \
3821   product(uintx, SharedBaseAddress, LP64_ONLY(32*G)                         \
3822           NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)),                           \
3823           "Address to allocate shared memory region for class data")        \
3824                                                                             \
3825   diagnostic(bool, EnableInvokeDynamic, true,                               \
3826           "support JSR 292 (method handles, invokedynamic, "                \
3827           "anonymous classes")                                              \
3828                                                                             \
3829   diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false,              \
3830           "Do not quit -Xshare:dump even if we encounter unverifiable "     \
3831           "classes. Just exclude them from the shared dictionary.")         \
3832                                                                             \
3833   diagnostic(bool, PrintMethodHandleStubs, false,                           \
3834           "Print generated stub code for method handles")                   \
3835                                                                             \
3836   develop(bool, TraceMethodHandles, false,                                  \
3837           "trace internal method handle operations")                        \
3838                                                                             \
3839   diagnostic(bool, VerifyMethodHandles, trueInDebug,                        \
3840           "perform extra checks when constructing method handles")          \
3841                                                                             \
3842   diagnostic(bool, ShowHiddenFrames, false,                                 \
3843           "show method handle implementation frames (usually hidden)")      \
3844                                                                             \
3845   experimental(bool, TrustFinalNonStaticFields, false,                      \
3846           "trust final non-static declarations for constant folding")       \
3847                                                                             \
3848   diagnostic(bool, FoldStableValues, true,                                  \
3849           "Optimize loads from stable fields (marked w/ @Stable)")          \
3850                                                                             \
3851   develop(bool, TraceInvokeDynamic, false,                                  \
3852           "trace internal invoke dynamic operations")                       \
3853                                                                             \
3854   diagnostic(bool, PauseAtStartup,      false,                              \
3855           "Causes the VM to pause at startup time and wait for the pause "  \
3856           "file to be removed (default: ./vm.paused.<pid>)")                \
3857                                                                             \
3858   diagnostic(ccstr, PauseAtStartupFile, NULL,                               \
3859           "The file to create and for whose removal to await when pausing " \
3860           "at startup. (default: ./vm.paused.<pid>)")                       \
3861                                                                             \
3862   diagnostic(bool, PauseAtExit, false,                                      \
3863           "Pause and wait for keypress on exit if a debugger is attached")  \
3864                                                                             \
3865   product(bool, ExtendedDTraceProbes,    false,                             \
3866           "Enable performance-impacting dtrace probes")                     \
3867                                                                             \
3868   product(bool, DTraceMethodProbes, false,                                  \
3869           "Enable dtrace probes for method-entry and method-exit")          \
3870                                                                             \
3871   product(bool, DTraceAllocProbes, false,                                   \
3872           "Enable dtrace probes for object allocation")                     \
3873                                                                             \
3874   product(bool, DTraceMonitorProbes, false,                                 \
3875           "Enable dtrace probes for monitor events")                        \
3876                                                                             \
3877   product(bool, RelaxAccessControlCheck, false,                             \
3878           "Relax the access control checks in the verifier")                \
3879                                                                             \
3880   diagnostic(bool, PrintDTraceDOF, false,                                   \
3881           "Print the DTrace DOF passed to the system for JSDT probes")      \
3882                                                                             \
3883   product(uintx, StringTableSize, defaultStringTableSize,                   \
3884           "Number of buckets in the interned String table")                 \
3885                                                                             \
3886   experimental(uintx, SymbolTableSize, defaultSymbolTableSize,              \
3887           "Number of buckets in the JVM internal Symbol table")             \
3888                                                                             \
3889   product(bool, UseStringDeduplication, false,                              \
3890           "Use string deduplication")                                       \
3891                                                                             \
3892   product(bool, PrintStringDeduplicationStatistics, false,                  \
3893           "Print string deduplication statistics")                          \
3894                                                                             \
3895   product(uintx, StringDeduplicationAgeThreshold, 3,                        \
3896           "A string must reach this age (or be promoted to an old region) " \
3897           "to be considered for deduplication")                             \
3898                                                                             \
3899   diagnostic(bool, StringDeduplicationResizeALot, false,                    \
3900           "Force table resize every time the table is scanned")             \
3901                                                                             \
3902   diagnostic(bool, StringDeduplicationRehashALot, false,                    \
3903           "Force table rehash every time the table is scanned")             \
3904                                                                             \
3905   develop(bool, TraceDefaultMethods, false,                                 \
3906           "Trace the default method processing steps")                      \
3907                                                                             \
3908   develop(bool, VerifyGenericSignatures, false,                             \
3909           "Abort VM on erroneous or inconsistent generic signatures")       \
3910                                                                             \
3911   product(bool, UseVMInterruptibleIO, false,                                \
3912           "(Unstable, Solaris-specific) Thread interrupt before or with "   \
3913           "EINTR for I/O operations results in OS_INTRPT. The default "     \
3914           "value of this flag is true for JDK 6 and earlier")               \
3915                                                                             \
3916   diagnostic(bool, WhiteBoxAPI, false,                                      \
3917           "Enable internal testing APIs")                                   \
3918                                                                             \
3919   product(bool, PrintGCCause, true,                                         \
3920           "Include GC cause in GC logging")                                 \
3921                                                                             \
3922   experimental(intx, SurvivorAlignmentInBytes, 0,                           \
3923            "Default survivor space alignment in bytes")                     \
3924                                                                             \
3925   product(bool , AllowNonVirtualCalls, false,                               \
3926           "Obey the ACC_SUPER flag and allow invokenonvirtual calls")       \
3927                                                                             \
3928   product(ccstr, DumpLoadedClassList, NULL,                                 \
3929           "Dump the names all loaded classes, that could be stored into "   \
3930           "the CDS archive, in the specified file")                         \
3931                                                                             \
3932   product(ccstr, SharedClassListFile, NULL,                                 \
3933           "Override the default CDS class list")                            \
3934                                                                             \
3935   diagnostic(ccstr, SharedArchiveFile, NULL,                                \
3936           "Override the default location of the CDS archive file")          \
3937                                                                             \
3938   product(ccstr, ExtraSharedClassListFile, NULL,                            \
3939           "Extra classlist for building the CDS archive file")              \
3940                                                                             \
3941   experimental(uintx, ArrayAllocatorMallocLimit,                            \
3942           SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx),                        \
3943           "Allocation less than this value will be allocated "              \
3944           "using malloc. Larger allocations will use mmap.")                \
3945                                                                             \
3946   product(bool, EnableTracing, false,                                       \
3947           "Enable event-based tracing")                                     \
3948                                                                             \
3949   product(bool, UseLockedTracing, false,                                    \
3950           "Use locked-tracing when doing event-based tracing")              \
3951                                                                             \
3952   product_pd(bool, PreserveFramePointer,                                    \
3953              "Use the FP register for holding the frame pointer "           \
3954              "and not as a general purpose register.")
3955 
3956 /*
3957  *  Macros for factoring of globals
3958  */
3959 
3960 // Interface macros
3961 #define DECLARE_PRODUCT_FLAG(type, name, value, doc)      extern "C" type name;
3962 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc)          extern "C" type name;
3963 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc)   extern "C" type name;
3964 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3965 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc)   extern "C" type name;
3966 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc)   extern "C" type name;
3967 #ifdef PRODUCT
3968 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type CONST_##name; const type name = value;
3969 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type CONST_##name; const type name = pd_##name;
3970 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type CONST_##name;
3971 #else
3972 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type name;
3973 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type name;
3974 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type name;
3975 #endif
3976 // Special LP64 flags, product only needed for now.
3977 #ifdef _LP64
3978 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3979 #else
3980 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3981 #endif // _LP64
3982 
3983 // Implementation macros
3984 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc)      type name = value;
3985 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc)          type name = pd_##name;
3986 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc)   type name = value;
3987 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3988 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc)   type name = value;
3989 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc)   type name = value;
3990 #ifdef PRODUCT
3991 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type CONST_##name = value;
3992 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type CONST_##name = pd_##name;
3993 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type CONST_##name = value;
3994 #else
3995 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type name = value;
3996 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type name = pd_##name;
3997 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type name = value;
3998 #endif
3999 #ifdef _LP64
4000 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
4001 #else
4002 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
4003 #endif // _LP64
4004 
4005 RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG)
4006 
4007 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
4008 
4009 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
4010 
4011 // Extensions
4012 
4013 #include "runtime/globals_ext.hpp"
4014 
4015 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP