1 /*
   2  * Copyright (c) 1997, 2014, 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 
 181 define_pd_global(intx, OnStackReplacePercentage,     0);
 182 define_pd_global(bool, ResizeTLAB,                   false);
 183 define_pd_global(intx, FreqInlineSize,               0);
 184 define_pd_global(intx, NewSizeThreadIncrease,        4*K);
 185 define_pd_global(intx, InlineClassNatives,           true);
 186 define_pd_global(intx, InlineUnsafeOps,              true);
 187 define_pd_global(intx, InitialCodeCacheSize,         160*K);
 188 define_pd_global(intx, ReservedCodeCacheSize,        32*M);
 189 define_pd_global(intx, CodeCacheExpansionSize,       32*K);
 190 define_pd_global(intx, CodeCacheMinBlockLength,      1);
 191 define_pd_global(intx, CodeCacheMinimumUseSpace,     200*K);
 192 define_pd_global(uintx,MetaspaceSize,    ScaleForWordSize(4*M));
 193 define_pd_global(bool, NeverActAsServerClassMachine, true);
 194 define_pd_global(uint64_t,MaxRAM,                    1ULL*G);
 195 #define CI_COMPILER_COUNT 0
 196 #else
 197 
 198 #ifdef COMPILER2
 199 #define CI_COMPILER_COUNT 2
 200 #else
 201 #define CI_COMPILER_COUNT 1
 202 #endif // COMPILER2
 203 
 204 #endif // no compilers
 205 
 206 // string type aliases used only in this file
 207 typedef const char* ccstr;
 208 typedef const char* ccstrlist;   // represents string arguments which accumulate
 209 
 210 struct Flag {
 211   enum Flags {
 212     // value origin
 213     DEFAULT          = 0,
 214     COMMAND_LINE     = 1,
 215     ENVIRON_VAR      = 2,
 216     CONFIG_FILE      = 3,
 217     MANAGEMENT       = 4,
 218     ERGONOMIC        = 5,
 219     ATTACH_ON_DEMAND = 6,
 220     INTERNAL         = 7,
 221 
 222     LAST_VALUE_ORIGIN = INTERNAL,
 223     VALUE_ORIGIN_BITS = 4,
 224     VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
 225 
 226     // flag kind
 227     KIND_PRODUCT            = 1 << 4,
 228     KIND_MANAGEABLE         = 1 << 5,
 229     KIND_DIAGNOSTIC         = 1 << 6,
 230     KIND_EXPERIMENTAL       = 1 << 7,
 231     KIND_NOT_PRODUCT        = 1 << 8,
 232     KIND_DEVELOP            = 1 << 9,
 233     KIND_PLATFORM_DEPENDENT = 1 << 10,
 234     KIND_READ_WRITE         = 1 << 11,
 235     KIND_C1                 = 1 << 12,
 236     KIND_C2                 = 1 << 13,
 237     KIND_ARCH               = 1 << 14,
 238     KIND_SHARK              = 1 << 15,
 239     KIND_LP64_PRODUCT       = 1 << 16,
 240     KIND_COMMERCIAL         = 1 << 17,
 241 
 242     KIND_MASK = ~VALUE_ORIGIN_MASK
 243   };
 244 
 245   const char* _type;
 246   const char* _name;
 247   void* _addr;
 248   NOT_PRODUCT(const char* _doc;)
 249   Flags _flags;
 250 
 251   // points to all Flags static array
 252   static Flag* flags;
 253 
 254   // number of flags
 255   static size_t numFlags;
 256 
 257   static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false);
 258   static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
 259 
 260   void check_writable();
 261 
 262   bool is_bool() const;
 263   bool get_bool() const;
 264   void set_bool(bool value);
 265 
 266   bool is_intx() const;
 267   intx get_intx() const;
 268   void set_intx(intx value);
 269 
 270   bool is_uintx() const;
 271   uintx get_uintx() const;
 272   void set_uintx(uintx value);
 273 
 274   bool is_uint64_t() const;
 275   uint64_t get_uint64_t() const;
 276   void set_uint64_t(uint64_t value);
 277 
 278   bool is_size_t() const;
 279   size_t get_size_t() const;
 280   void set_size_t(size_t value);
 281 
 282   bool is_double() const;
 283   double get_double() const;
 284   void set_double(double value);
 285 
 286   bool is_ccstr() const;
 287   bool ccstr_accumulates() const;
 288   ccstr get_ccstr() const;
 289   void set_ccstr(ccstr value);
 290 
 291   Flags get_origin();
 292   void set_origin(Flags origin);
 293 
 294   bool is_default();
 295   bool is_ergonomic();
 296   bool is_command_line();
 297 
 298   bool is_product() const;
 299   bool is_manageable() const;
 300   bool is_diagnostic() const;
 301   bool is_experimental() const;
 302   bool is_notproduct() const;
 303   bool is_develop() const;
 304   bool is_read_write() const;
 305   bool is_commercial() const;
 306 
 307   bool is_constant_in_binary() const;
 308 
 309   bool is_unlocker() const;
 310   bool is_unlocked() const;
 311   bool is_writeable() const;
 312   bool is_external() const;
 313 
 314   bool is_unlocker_ext() const;
 315   bool is_unlocked_ext() const;
 316   bool is_writeable_ext() const;
 317   bool is_external_ext() const;
 318 
 319   void get_locked_message(char*, int) const;
 320   void get_locked_message_ext(char*, int) const;
 321 
 322   void print_on(outputStream* st, bool withComments = false );
 323   void print_kind(outputStream* st);
 324   void print_as_flag(outputStream* st);
 325 };
 326 
 327 // debug flags control various aspects of the VM and are global accessible
 328 
 329 // use FlagSetting to temporarily change some debug flag
 330 // e.g. FlagSetting fs(DebugThisAndThat, true);
 331 // restored to previous value upon leaving scope
 332 class FlagSetting {
 333   bool val;
 334   bool* flag;
 335  public:
 336   FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
 337   ~FlagSetting()                       { *flag = val; }
 338 };
 339 
 340 
 341 class CounterSetting {
 342   intx* counter;
 343  public:
 344   CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
 345   ~CounterSetting()         { (*counter)--; }
 346 };
 347 
 348 
 349 class UIntFlagSetting {
 350   uintx val;
 351   uintx* flag;
 352  public:
 353   UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
 354   ~UIntFlagSetting()                         { *flag = val; }
 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 class SizeTFlagSetting {
 366   size_t val;
 367   size_t* flag;
 368  public:
 369   SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; }
 370   ~SizeTFlagSetting()                           { *flag = val; }
 371 };
 372 
 373 
 374 class CommandLineFlags {
 375  public:
 376   static bool boolAt(const char* name, size_t len, bool* value);
 377   static bool boolAt(const char* name, bool* value)      { return boolAt(name, strlen(name), value); }
 378   static bool boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin);
 379   static bool boolAtPut(const char* name, bool* value, Flag::Flags origin)   { return boolAtPut(name, strlen(name), value, origin); }
 380 
 381   static bool intxAt(const char* name, size_t len, intx* value);
 382   static bool intxAt(const char* name, intx* value)      { return intxAt(name, strlen(name), value); }
 383   static bool intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin);
 384   static bool intxAtPut(const char* name, intx* value, Flag::Flags origin)   { return intxAtPut(name, strlen(name), value, origin); }
 385 
 386   static bool uintxAt(const char* name, size_t len, uintx* value);
 387   static bool uintxAt(const char* name, uintx* value)    { return uintxAt(name, strlen(name), value); }
 388   static bool uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin);
 389   static bool uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
 390 
 391   static bool size_tAt(const char* name, size_t len, size_t* value);
 392   static bool size_tAt(const char* name, size_t* value)    { return size_tAt(name, strlen(name), value); }
 393   static bool size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin);
 394   static bool size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); }
 395 
 396   static bool uint64_tAt(const char* name, size_t len, uint64_t* value);
 397   static bool uint64_tAt(const char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
 398   static bool uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin);
 399   static bool uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
 400 
 401   static bool doubleAt(const char* name, size_t len, double* value);
 402   static bool doubleAt(const char* name, double* value)    { return doubleAt(name, strlen(name), value); }
 403   static bool doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin);
 404   static bool doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
 405 
 406   static bool ccstrAt(const char* name, size_t len, ccstr* value);
 407   static bool ccstrAt(const char* name, ccstr* value)    { return ccstrAt(name, strlen(name), value); }
 408   // Contract:  Flag will make private copy of the incoming value.
 409   // Outgoing value is always malloc-ed, and caller MUST call free.
 410   static bool ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin);
 411   static bool ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
 412 
 413   // Returns false if name is not a command line flag.
 414   static bool wasSetOnCmdline(const char* name, bool* value);
 415   static void printSetFlags(outputStream* out);
 416 
 417   static void printFlags(outputStream* out, bool withComments);
 418 
 419   static void verify() PRODUCT_RETURN;
 420 };
 421 
 422 // use this for flags that are true by default in the debug version but
 423 // false in the optimized version, and vice versa
 424 #ifdef ASSERT
 425 #define trueInDebug  true
 426 #define falseInDebug false
 427 #else
 428 #define trueInDebug  false
 429 #define falseInDebug true
 430 #endif
 431 
 432 // use this for flags that are true per default in the product build
 433 // but false in development builds, and vice versa
 434 #ifdef PRODUCT
 435 #define trueInProduct  true
 436 #define falseInProduct false
 437 #else
 438 #define trueInProduct  false
 439 #define falseInProduct true
 440 #endif
 441 
 442 #ifdef JAVASE_EMBEDDED
 443 #define falseInEmbedded false
 444 #else
 445 #define falseInEmbedded true
 446 #endif
 447 
 448 // develop flags are settable / visible only during development and are constant in the PRODUCT version
 449 // product flags are always settable / visible
 450 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
 451 
 452 // A flag must be declared with one of the following types:
 453 // bool, intx, uintx, ccstr.
 454 // The type "ccstr" is an alias for "const char*" and is used
 455 // only in this file, because the macrology requires single-token type names.
 456 
 457 // Note: Diagnostic options not meant for VM tuning or for product modes.
 458 // They are to be used for VM quality assurance or field diagnosis
 459 // of VM bugs.  They are hidden so that users will not be encouraged to
 460 // try them as if they were VM ordinary execution options.  However, they
 461 // are available in the product version of the VM.  Under instruction
 462 // from support engineers, VM customers can turn them on to collect
 463 // diagnostic information about VM problems.  To use a VM diagnostic
 464 // option, you must first specify +UnlockDiagnosticVMOptions.
 465 // (This master switch also affects the behavior of -Xprintflags.)
 466 //
 467 // experimental flags are in support of features that are not
 468 //    part of the officially supported product, but are available
 469 //    for experimenting with. They could, for example, be performance
 470 //    features that may not have undergone full or rigorous QA, but which may
 471 //    help performance in some cases and released for experimentation
 472 //    by the community of users and developers. This flag also allows one to
 473 //    be able to build a fully supported product that nonetheless also
 474 //    ships with some unsupported, lightly tested, experimental features.
 475 //    Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
 476 //    UnlockExperimentalVMOptions flag, which allows the control and
 477 //    modification of the experimental flags.
 478 //
 479 // Nota bene: neither diagnostic nor experimental options should be used casually,
 480 //    and they are not supported on production loads, except under explicit
 481 //    direction from support engineers.
 482 //
 483 // manageable flags are writeable external product flags.
 484 //    They are dynamically writeable through the JDK management interface
 485 //    (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
 486 //    These flags are external exported interface (see CCC).  The list of
 487 //    manageable flags can be queried programmatically through the management
 488 //    interface.
 489 //
 490 //    A flag can be made as "manageable" only if
 491 //    - the flag is defined in a CCC as an external exported interface.
 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 //    - you want the flag to be queried programmatically by the customers.
 496 //
 497 // product_rw flags are writeable internal product flags.
 498 //    They are like "manageable" flags but for internal/private use.
 499 //    The list of product_rw flags are internal/private flags which
 500 //    may be changed/removed in a future release.  It can be set
 501 //    through the management interface to get/set value
 502 //    when the name of flag is supplied.
 503 //
 504 //    A flag can be made as "product_rw" only if
 505 //    - the VM implementation supports dynamic setting of the flag.
 506 //      This implies that the VM must *always* query the flag variable
 507 //      and not reuse state related to the flag state at any given time.
 508 //
 509 // Note that when there is a need to support develop flags to be writeable,
 510 // it can be done in the same way as product_rw.
 511 
 512 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
 513                                                                             \
 514   lp64_product(bool, UseCompressedOops, false,                              \
 515           "Use 32-bit object references in 64-bit VM. "                     \
 516           "lp64_product means flag is always constant in 32 bit VM")        \
 517                                                                             \
 518   lp64_product(bool, UseCompressedClassPointers, false,                     \
 519           "Use 32-bit class pointers in 64-bit VM. "                        \
 520           "lp64_product means flag is always constant in 32 bit VM")        \
 521                                                                             \
 522   notproduct(bool, CheckCompressedOops, true,                               \
 523           "Generate checks in encoding/decoding code in debug VM")          \
 524                                                                             \
 525   product_pd(uintx, HeapBaseMinAddress,                                     \
 526           "OS specific low limit for heap base address")                    \
 527                                                                             \
 528   diagnostic(bool, PrintCompressedOopsMode, false,                          \
 529           "Print compressed oops base address and encoding mode")           \
 530                                                                             \
 531   lp64_product(intx, ObjectAlignmentInBytes, 8,                             \
 532           "Default object alignment in bytes, 8 is minimum")                \
 533                                                                             \
 534   product(bool, AssumeMP, false,                                            \
 535           "Instruct the VM to assume multiple processors are available")    \
 536                                                                             \
 537   /* UseMembar is theoretically a temp flag used for memory barrier         \
 538    * removal testing.  It was supposed to be removed before FCS but has     \
 539    * been re-added (see 6401008) */                                         \
 540   product_pd(bool, UseMembar,                                               \
 541           "(Unstable) Issues membars on thread state transitions")          \
 542                                                                             \
 543   develop(bool, CleanChunkPoolAsync, falseInEmbedded,                       \
 544           "Clean the chunk pool asynchronously")                            \
 545                                                                             \
 546   experimental(bool, AlwaysSafeConstructors, false,                         \
 547           "Force safe construction, as if all fields are final.")           \
 548                                                                             \
 549   /* Temporary: See 6948537 */                                              \
 550   experimental(bool, UseMemSetInBOT, true,                                  \
 551           "(Unstable) uses memset in BOT updates in GC code")               \
 552                                                                             \
 553   diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug,                  \
 554           "Enable normal processing of flags relating to field diagnostics")\
 555                                                                             \
 556   experimental(bool, UnlockExperimentalVMOptions, false,                    \
 557           "Enable normal processing of flags relating to experimental "     \
 558           "features")                                                       \
 559                                                                             \
 560   product(bool, JavaMonitorsInStackTrace, true,                             \
 561           "Print information about Java monitor locks when the stacks are"  \
 562           "dumped")                                                         \
 563                                                                             \
 564   product_pd(bool, UseLargePages,                                           \
 565           "Use large page memory")                                          \
 566                                                                             \
 567   product_pd(bool, UseLargePagesIndividualAllocation,                       \
 568           "Allocate large pages individually for better affinity")          \
 569                                                                             \
 570   develop(bool, LargePagesIndividualAllocationInjectError, false,           \
 571           "Fail large pages individual allocation")                         \
 572                                                                             \
 573   product(bool, UseLargePagesInMetaspace, false,                            \
 574           "Use large page memory in metaspace. "                            \
 575           "Only used if UseLargePages is enabled.")                         \
 576                                                                             \
 577   develop(bool, TracePageSizes, false,                                      \
 578           "Trace page size selection and usage")                            \
 579                                                                             \
 580   product(bool, UseNUMA, false,                                             \
 581           "Use NUMA if available")                                          \
 582                                                                             \
 583   product(bool, UseNUMAInterleaving, false,                                 \
 584           "Interleave memory across NUMA nodes if available")               \
 585                                                                             \
 586   product(uintx, NUMAInterleaveGranularity, 2*M,                            \
 587           "Granularity to use for NUMA interleaving on Windows OS")         \
 588                                                                             \
 589   product(bool, ForceNUMA, false,                                           \
 590           "Force NUMA optimizations on single-node/UMA systems")            \
 591                                                                             \
 592   product(uintx, NUMAChunkResizeWeight, 20,                                 \
 593           "Percentage (0-100) used to weight the current sample when "      \
 594           "computing exponentially decaying average for "                   \
 595           "AdaptiveNUMAChunkSizing")                                        \
 596                                                                             \
 597   product(uintx, NUMASpaceResizeRate, 1*G,                                  \
 598           "Do not reallocate more than this amount per collection")         \
 599                                                                             \
 600   product(bool, UseAdaptiveNUMAChunkSizing, true,                           \
 601           "Enable adaptive chunk sizing for NUMA")                          \
 602                                                                             \
 603   product(bool, NUMAStats, false,                                           \
 604           "Print NUMA stats in detailed heap information")                  \
 605                                                                             \
 606   product(uintx, NUMAPageScanRate, 256,                                     \
 607           "Maximum number of pages to include in the page scan procedure")  \
 608                                                                             \
 609   product_pd(bool, NeedsDeoptSuspend,                                       \
 610           "True for register window machines (sparc/ia64)")                 \
 611                                                                             \
 612   product(intx, UseSSE, 99,                                                 \
 613           "Highest supported SSE instructions set on x86/x64")              \
 614                                                                             \
 615   product(bool, UseAES, false,                                              \
 616           "Control whether AES instructions can be used on x86/x64")        \
 617                                                                             \
 618   product(bool, UseSHA, false,                                              \
 619           "Control whether SHA instructions can be used on SPARC")          \
 620                                                                             \
 621   product(uintx, LargePageSizeInBytes, 0,                                   \
 622           "Large page size (0 to let VM choose the page size)")             \
 623                                                                             \
 624   product(uintx, LargePageHeapSizeThreshold, 128*M,                         \
 625           "Use large pages if maximum heap is at least this big")           \
 626                                                                             \
 627   product(bool, ForceTimeHighResolution, false,                             \
 628           "Using high time resolution (for Win32 only)")                    \
 629                                                                             \
 630   develop(bool, TraceItables, false,                                        \
 631           "Trace initialization and use of itables")                        \
 632                                                                             \
 633   develop(bool, TracePcPatching, false,                                     \
 634           "Trace usage of frame::patch_pc")                                 \
 635                                                                             \
 636   develop(bool, TraceJumps, false,                                          \
 637           "Trace assembly jumps in thread ring buffer")                     \
 638                                                                             \
 639   develop(bool, TraceRelocator, false,                                      \
 640           "Trace the bytecode relocator")                                   \
 641                                                                             \
 642   develop(bool, TraceLongCompiles, false,                                   \
 643           "Print out every time compilation is longer than "                \
 644           "a given threshold")                                              \
 645                                                                             \
 646   develop(bool, SafepointALot, false,                                       \
 647           "Generate a lot of safepoints. This works with "                  \
 648           "GuaranteedSafepointInterval")                                    \
 649                                                                             \
 650   product_pd(bool, BackgroundCompilation,                                   \
 651           "A thread requesting compilation is not blocked during "          \
 652           "compilation")                                                    \
 653                                                                             \
 654   product(bool, PrintVMQWaitTime, false,                                    \
 655           "Print out the waiting time in VM operation queue")               \
 656                                                                             \
 657   develop(bool, NoYieldsInMicrolock, false,                                 \
 658           "Disable yields in microlock")                                    \
 659                                                                             \
 660   develop(bool, TraceOopMapGeneration, false,                               \
 661           "Show OopMapGeneration")                                          \
 662                                                                             \
 663   product(bool, MethodFlushing, true,                                       \
 664           "Reclamation of zombie and not-entrant methods")                  \
 665                                                                             \
 666   develop(bool, VerifyStack, false,                                         \
 667           "Verify stack of each thread when it is entering a runtime call") \
 668                                                                             \
 669   diagnostic(bool, ForceUnreachable, false,                                 \
 670           "Make all non code cache addresses to be unreachable by "         \
 671           "forcing use of 64bit literal fixups")                            \
 672                                                                             \
 673   notproduct(bool, StressDerivedPointers, false,                            \
 674           "Force scavenge when a derived pointer is detected on stack "     \
 675           "after rtm call")                                                 \
 676                                                                             \
 677   develop(bool, TraceDerivedPointers, false,                                \
 678           "Trace traversal of derived pointers on stack")                   \
 679                                                                             \
 680   notproduct(bool, TraceCodeBlobStacks, false,                              \
 681           "Trace stack-walk of codeblobs")                                  \
 682                                                                             \
 683   product(bool, PrintJNIResolving, false,                                   \
 684           "Used to implement -v:jni")                                       \
 685                                                                             \
 686   notproduct(bool, PrintRewrites, false,                                    \
 687           "Print methods that are being rewritten")                         \
 688                                                                             \
 689   product(bool, UseInlineCaches, true,                                      \
 690           "Use Inline Caches for virtual calls ")                           \
 691                                                                             \
 692   develop(bool, InlineArrayCopy, true,                                      \
 693           "Inline arraycopy native that is known to be part of "            \
 694           "base library DLL")                                               \
 695                                                                             \
 696   develop(bool, InlineObjectHash, true,                                     \
 697           "Inline Object::hashCode() native that is known to be part "      \
 698           "of base library DLL")                                            \
 699                                                                             \
 700   develop(bool, InlineNatives, true,                                        \
 701           "Inline natives that are known to be part of base library DLL")   \
 702                                                                             \
 703   develop(bool, InlineMathNatives, true,                                    \
 704           "Inline SinD, CosD, etc.")                                        \
 705                                                                             \
 706   develop(bool, InlineClassNatives, true,                                   \
 707           "Inline Class.isInstance, etc")                                   \
 708                                                                             \
 709   develop(bool, InlineThreadNatives, true,                                  \
 710           "Inline Thread.currentThread, etc")                               \
 711                                                                             \
 712   develop(bool, InlineUnsafeOps, true,                                      \
 713           "Inline memory ops (native methods) from sun.misc.Unsafe")        \
 714                                                                             \
 715   product(bool, CriticalJNINatives, true,                                   \
 716           "Check for critical JNI entry points")                            \
 717                                                                             \
 718   notproduct(bool, StressCriticalJNINatives, false,                         \
 719           "Exercise register saving code in critical natives")              \
 720                                                                             \
 721   product(bool, UseSSE42Intrinsics, false,                                  \
 722           "SSE4.2 versions of intrinsics")                                  \
 723                                                                             \
 724   product(bool, UseAESIntrinsics, false,                                    \
 725           "Use intrinsics for AES versions of crypto")                      \
 726                                                                             \
 727   product(bool, UseSHA1Intrinsics, false,                                   \
 728           "Use intrinsics for SHA-1 crypto hash function")                  \
 729                                                                             \
 730   product(bool, UseSHA256Intrinsics, false,                                 \
 731           "Use intrinsics for SHA-224 and SHA-256 crypto hash functions")   \
 732                                                                             \
 733   product(bool, UseSHA512Intrinsics, false,                                 \
 734           "Use intrinsics for SHA-384 and SHA-512 crypto hash functions")   \
 735                                                                             \
 736   product(bool, UseCRC32Intrinsics, false,                                  \
 737           "use intrinsics for java.util.zip.CRC32")                         \
 738                                                                             \
 739   develop(bool, TraceCallFixup, false,                                      \
 740           "Trace all call fixups")                                          \
 741                                                                             \
 742   develop(bool, DeoptimizeALot, false,                                      \
 743           "Deoptimize at every exit from the runtime system")               \
 744                                                                             \
 745   notproduct(ccstrlist, DeoptimizeOnlyAt, "",                               \
 746           "A comma separated list of bcis to deoptimize at")                \
 747                                                                             \
 748   product(bool, DeoptimizeRandom, false,                                    \
 749           "Deoptimize random frames on random exit from the runtime system")\
 750                                                                             \
 751   notproduct(bool, ZombieALot, false,                                       \
 752           "Create zombies (non-entrant) at exit from the runtime system")   \
 753                                                                             \
 754   product(bool, UnlinkSymbolsALot, false,                                   \
 755           "Unlink unreferenced symbols from the symbol table at safepoints")\
 756                                                                             \
 757   notproduct(bool, WalkStackALot, false,                                    \
 758           "Trace stack (no print) at every exit from the runtime system")   \
 759                                                                             \
 760   product(bool, Debugging, false,                                           \
 761           "Set when executing debug methods in debug.cpp "                  \
 762           "(to prevent triggering assertions)")                             \
 763                                                                             \
 764   notproduct(bool, StrictSafepointChecks, trueInDebug,                      \
 765           "Enable strict checks that safepoints cannot happen for threads " \
 766           "that use No_Safepoint_Verifier")                                 \
 767                                                                             \
 768   notproduct(bool, VerifyLastFrame, false,                                  \
 769           "Verify oops on last frame on entry to VM")                       \
 770                                                                             \
 771   develop(bool, TraceHandleAllocation, false,                               \
 772           "Print out warnings when suspiciously many handles are allocated")\
 773                                                                             \
 774   product(bool, UseCompilerSafepoints, true,                                \
 775           "Stop at safepoints in compiled code")                            \
 776                                                                             \
 777   product(bool, FailOverToOldVerifier, true,                                \
 778           "Fail over to old verifier when split verifier fails")            \
 779                                                                             \
 780   develop(bool, ShowSafepointMsgs, false,                                   \
 781           "Show message about safepoint synchronization")                   \
 782                                                                             \
 783   product(bool, SafepointTimeout, false,                                    \
 784           "Time out and warn or fail after SafepointTimeoutDelay "          \
 785           "milliseconds if failed to reach safepoint")                      \
 786                                                                             \
 787   develop(bool, DieOnSafepointTimeout, false,                               \
 788           "Die upon failure to reach safepoint (see SafepointTimeout)")     \
 789                                                                             \
 790   /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */      \
 791   /* typically, at most a few retries are needed */                         \
 792   product(intx, SuspendRetryCount, 50,                                      \
 793           "Maximum retry count for an external suspend request")            \
 794                                                                             \
 795   product(intx, SuspendRetryDelay, 5,                                       \
 796           "Milliseconds to delay per retry (* current_retry_count)")        \
 797                                                                             \
 798   product(bool, AssertOnSuspendWaitFailure, false,                          \
 799           "Assert/Guarantee on external suspend wait failure")              \
 800                                                                             \
 801   product(bool, TraceSuspendWaitFailures, false,                            \
 802           "Trace external suspend wait failures")                           \
 803                                                                             \
 804   product(bool, MaxFDLimit, true,                                           \
 805           "Bump the number of file descriptors to maximum in Solaris")      \
 806                                                                             \
 807   diagnostic(bool, LogEvents, true,                                         \
 808           "Enable the various ring buffer event logs")                      \
 809                                                                             \
 810   diagnostic(uintx, LogEventsBufferEntries, 10,                             \
 811           "Number of ring buffer event logs")                               \
 812                                                                             \
 813   product(bool, BytecodeVerificationRemote, true,                           \
 814           "Enable the Java bytecode verifier for remote classes")           \
 815                                                                             \
 816   product(bool, BytecodeVerificationLocal, false,                           \
 817           "Enable the Java bytecode verifier for local classes")            \
 818                                                                             \
 819   develop(bool, ForceFloatExceptions, trueInDebug,                          \
 820           "Force exceptions on FP stack under/overflow")                    \
 821                                                                             \
 822   develop(bool, VerifyStackAtCalls, false,                                  \
 823           "Verify that the stack pointer is unchanged after calls")         \
 824                                                                             \
 825   develop(bool, TraceJavaAssertions, false,                                 \
 826           "Trace java language assertions")                                 \
 827                                                                             \
 828   notproduct(bool, CheckAssertionStatusDirectives, false,                   \
 829           "Temporary - see javaClasses.cpp")                                \
 830                                                                             \
 831   notproduct(bool, PrintMallocFree, false,                                  \
 832           "Trace calls to C heap malloc/free allocation")                   \
 833                                                                             \
 834   product(bool, PrintOopAddress, false,                                     \
 835           "Always print the location of the oop")                           \
 836                                                                             \
 837   notproduct(bool, VerifyCodeCache, false,                                  \
 838           "Verify code cache on memory allocation/deallocation")            \
 839                                                                             \
 840   develop(bool, ZapDeadCompiledLocals, false,                               \
 841           "Zap dead locals in compiler frames")                             \
 842                                                                             \
 843   notproduct(bool, ZapDeadLocalsOld, false,                                 \
 844           "Zap dead locals (old version, zaps all frames when "             \
 845           "entering the VM")                                                \
 846                                                                             \
 847   notproduct(bool, CheckOopishValues, false,                                \
 848           "Warn if value contains oop (requires ZapDeadLocals)")            \
 849                                                                             \
 850   develop(bool, UseMallocOnly, false,                                       \
 851           "Use only malloc/free for allocation (no resource area/arena)")   \
 852                                                                             \
 853   develop(bool, PrintMalloc, false,                                         \
 854           "Print all malloc/free calls")                                    \
 855                                                                             \
 856   develop(bool, PrintMallocStatistics, false,                               \
 857           "Print malloc/free statistics")                                   \
 858                                                                             \
 859   develop(bool, ZapResourceArea, trueInDebug,                               \
 860           "Zap freed resource/arena space with 0xABABABAB")                 \
 861                                                                             \
 862   notproduct(bool, ZapVMHandleArea, trueInDebug,                            \
 863           "Zap freed VM handle space with 0xBCBCBCBC")                      \
 864                                                                             \
 865   develop(bool, ZapJNIHandleArea, trueInDebug,                              \
 866           "Zap freed JNI handle space with 0xFEFEFEFE")                     \
 867                                                                             \
 868   notproduct(bool, ZapStackSegments, trueInDebug,                           \
 869           "Zap allocated/freed stack segments with 0xFADFADED")             \
 870                                                                             \
 871   develop(bool, ZapUnusedHeapArea, trueInDebug,                             \
 872           "Zap unused heap space with 0xBAADBABE")                          \
 873                                                                             \
 874   develop(bool, TraceZapUnusedHeapArea, false,                              \
 875           "Trace zapping of unused heap space")                             \
 876                                                                             \
 877   develop(bool, CheckZapUnusedHeapArea, false,                              \
 878           "Check zapping of unused heap space")                             \
 879                                                                             \
 880   develop(bool, ZapFillerObjects, trueInDebug,                              \
 881           "Zap filler objects with 0xDEAFBABE")                             \
 882                                                                             \
 883   develop(bool, PrintVMMessages, true,                                      \
 884           "Print VM messages on console")                                   \
 885                                                                             \
 886   product(bool, PrintGCApplicationConcurrentTime, false,                    \
 887           "Print the time the application has been running")                \
 888                                                                             \
 889   product(bool, PrintGCApplicationStoppedTime, false,                       \
 890           "Print the time the application has been stopped")                \
 891                                                                             \
 892   diagnostic(bool, VerboseVerification, false,                              \
 893           "Display detailed verification details")                          \
 894                                                                             \
 895   notproduct(uintx, ErrorHandlerTest, 0,                                    \
 896           "If > 0, provokes an error after VM initialization; the value "   \
 897           "determines which error to provoke. See test_error_handler() "    \
 898           "in debug.cpp.")                                                  \
 899                                                                             \
 900   develop(bool, Verbose, false,                                             \
 901           "Print additional debugging information from other modes")        \
 902                                                                             \
 903   develop(bool, PrintMiscellaneous, false,                                  \
 904           "Print uncategorized debugging information (requires +Verbose)")  \
 905                                                                             \
 906   develop(bool, WizardMode, false,                                          \
 907           "Print much more debugging information")                          \
 908                                                                             \
 909   product(bool, ShowMessageBoxOnError, false,                               \
 910           "Keep process alive on VM fatal error")                           \
 911                                                                             \
 912   product(bool, CreateMinidumpOnCrash, false,                               \
 913           "Create minidump on VM fatal error")                              \
 914                                                                             \
 915   product_pd(bool, UseOSErrorReporting,                                     \
 916           "Let VM fatal error propagate to the OS (ie. WER on Windows)")    \
 917                                                                             \
 918   product(bool, SuppressFatalErrorMessage, false,                           \
 919           "Report NO fatal error message (avoid deadlock)")                 \
 920                                                                             \
 921   product(ccstrlist, OnError, "",                                           \
 922           "Run user-defined commands on fatal error; see VMError.cpp "      \
 923           "for examples")                                                   \
 924                                                                             \
 925   product(ccstrlist, OnOutOfMemoryError, "",                                \
 926           "Run user-defined commands on first java.lang.OutOfMemoryError")  \
 927                                                                             \
 928   manageable(bool, HeapDumpBeforeFullGC, false,                             \
 929           "Dump heap to file before any major stop-the-world GC")           \
 930                                                                             \
 931   manageable(bool, HeapDumpAfterFullGC, false,                              \
 932           "Dump heap to file after any major stop-the-world GC")            \
 933                                                                             \
 934   manageable(bool, HeapDumpOnOutOfMemoryError, false,                       \
 935           "Dump heap to file when java.lang.OutOfMemoryError is thrown")    \
 936                                                                             \
 937   manageable(ccstr, HeapDumpPath, NULL,                                     \
 938           "When HeapDumpOnOutOfMemoryError is on, the path (filename or "   \
 939           "directory) of the dump file (defaults to java_pid<pid>.hprof "   \
 940           "in the working directory)")                                      \
 941                                                                             \
 942   develop(uintx, SegmentedHeapDumpThreshold, 2*G,                           \
 943           "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) "     \
 944           "when the heap usage is larger than this")                        \
 945                                                                             \
 946   develop(uintx, HeapDumpSegmentSize, 1*G,                                  \
 947           "Approximate segment size when generating a segmented heap dump") \
 948                                                                             \
 949   develop(bool, BreakAtWarning, false,                                      \
 950           "Execute breakpoint upon encountering VM warning")                \
 951                                                                             \
 952   develop(bool, TraceVMOperation, false,                                    \
 953           "Trace VM operations")                                            \
 954                                                                             \
 955   develop(bool, UseFakeTimers, false,                                       \
 956           "Tell whether the VM should use system time or a fake timer")     \
 957                                                                             \
 958   product(ccstr, NativeMemoryTracking, "off",                               \
 959           "Native memory tracking options")                                 \
 960                                                                             \
 961   diagnostic(bool, PrintNMTStatistics, false,                               \
 962           "Print native memory tracking summary data if it is on")          \
 963                                                                             \
 964   diagnostic(bool, LogCompilation, false,                                   \
 965           "Log compilation activity in detail to LogFile")                  \
 966                                                                             \
 967   product(bool, PrintCompilation, false,                                    \
 968           "Print compilations")                                             \
 969                                                                             \
 970   diagnostic(bool, TraceNMethodInstalls, false,                             \
 971           "Trace nmethod installation")                                     \
 972                                                                             \
 973   diagnostic(intx, ScavengeRootsInCode, 2,                                  \
 974           "0: do not allow scavengable oops in the code cache; "            \
 975           "1: allow scavenging from the code cache; "                       \
 976           "2: emit as many constants as the compiler can see")              \
 977                                                                             \
 978   product(bool, AlwaysRestoreFPU, false,                                    \
 979           "Restore the FPU control word after every JNI call (expensive)")  \
 980                                                                             \
 981   diagnostic(bool, PrintCompilation2, false,                                \
 982           "Print additional statistics per compilation")                    \
 983                                                                             \
 984   diagnostic(bool, PrintAdapterHandlers, false,                             \
 985           "Print code generated for i2c/c2i adapters")                      \
 986                                                                             \
 987   diagnostic(bool, VerifyAdapterCalls, trueInDebug,                         \
 988           "Verify that i2c/c2i adapters are called properly")               \
 989                                                                             \
 990   develop(bool, VerifyAdapterSharing, false,                                \
 991           "Verify that the code for shared adapters is the equivalent")     \
 992                                                                             \
 993   diagnostic(bool, PrintAssembly, false,                                    \
 994           "Print assembly code (using external disassembler.so)")           \
 995                                                                             \
 996   diagnostic(ccstr, PrintAssemblyOptions, NULL,                             \
 997           "Print options string passed to disassembler.so")                 \
 998                                                                             \
 999   diagnostic(bool, PrintNMethods, false,                                    \
1000           "Print assembly code for nmethods when generated")                \
1001                                                                             \
1002   diagnostic(bool, PrintNativeNMethods, false,                              \
1003           "Print assembly code for native nmethods when generated")         \
1004                                                                             \
1005   develop(bool, PrintDebugInfo, false,                                      \
1006           "Print debug information for all nmethods when generated")        \
1007                                                                             \
1008   develop(bool, PrintRelocations, false,                                    \
1009           "Print relocation information for all nmethods when generated")   \
1010                                                                             \
1011   develop(bool, PrintDependencies, false,                                   \
1012           "Print dependency information for all nmethods when generated")   \
1013                                                                             \
1014   develop(bool, PrintExceptionHandlers, false,                              \
1015           "Print exception handler tables for all nmethods when generated") \
1016                                                                             \
1017   develop(bool, StressCompiledExceptionHandlers, false,                     \
1018           "Exercise compiled exception handlers")                           \
1019                                                                             \
1020   develop(bool, InterceptOSException, false,                                \
1021           "Start debugger when an implicit OS (e.g. NULL) "                 \
1022           "exception happens")                                              \
1023                                                                             \
1024   product(bool, PrintCodeCache, false,                                      \
1025           "Print the code cache memory usage when exiting")                 \
1026                                                                             \
1027   develop(bool, PrintCodeCache2, false,                                     \
1028           "Print detailed usage information on the code cache when exiting")\
1029                                                                             \
1030   product(bool, PrintCodeCacheOnCompilation, false,                         \
1031           "Print the code cache memory usage each time a method is "        \
1032           "compiled")                                                       \
1033                                                                             \
1034   diagnostic(bool, PrintStubCode, false,                                    \
1035           "Print generated stub code")                                      \
1036                                                                             \
1037   product(bool, StackTraceInThrowable, true,                                \
1038           "Collect backtrace in throwable when exception happens")          \
1039                                                                             \
1040   product(bool, OmitStackTraceInFastThrow, true,                            \
1041           "Omit backtraces for some 'hot' exceptions in optimized code")    \
1042                                                                             \
1043   product(bool, ProfilerPrintByteCodeStatistics, false,                     \
1044           "Print bytecode statistics when dumping profiler output")         \
1045                                                                             \
1046   product(bool, ProfilerRecordPC, false,                                    \
1047           "Collect ticks for each 16 byte interval of compiled code")       \
1048                                                                             \
1049   product(bool, ProfileVM, false,                                           \
1050           "Profile ticks that fall within VM (either in the VM Thread "     \
1051           "or VM code called through stubs)")                               \
1052                                                                             \
1053   product(bool, ProfileIntervals, false,                                    \
1054           "Print profiles for each interval (see ProfileIntervalsTicks)")   \
1055                                                                             \
1056   notproduct(bool, ProfilerCheckIntervals, false,                           \
1057           "Collect and print information on spacing of profiler ticks")     \
1058                                                                             \
1059   develop(bool, PrintJVMWarnings, false,                                    \
1060           "Print warnings for unimplemented JVM functions")                 \
1061                                                                             \
1062   product(bool, PrintWarnings, true,                                        \
1063           "Print JVM warnings to output stream")                            \
1064                                                                             \
1065   notproduct(uintx, WarnOnStalledSpinLock, 0,                               \
1066           "Print warnings for stalled SpinLocks")                           \
1067                                                                             \
1068   product(bool, RegisterFinalizersAtInit, true,                             \
1069           "Register finalizable objects at end of Object.<init> or "        \
1070           "after allocation")                                               \
1071                                                                             \
1072   develop(bool, RegisterReferences, true,                                   \
1073           "Tell whether the VM should register soft/weak/final/phantom "    \
1074           "references")                                                     \
1075                                                                             \
1076   develop(bool, IgnoreRewrites, false,                                      \
1077           "Suppress rewrites of bytecodes in the oopmap generator. "        \
1078           "This is unsafe!")                                                \
1079                                                                             \
1080   develop(bool, PrintCodeCacheExtension, false,                             \
1081           "Print extension of code cache")                                  \
1082                                                                             \
1083   develop(bool, UsePrivilegedStack, true,                                   \
1084           "Enable the security JVM functions")                              \
1085                                                                             \
1086   develop(bool, ProtectionDomainVerification, true,                         \
1087           "Verify protection domain before resolution in system dictionary")\
1088                                                                             \
1089   product(bool, ClassUnloading, true,                                       \
1090           "Do unloading of classes")                                        \
1091                                                                             \
1092   product(bool, ClassUnloadingWithConcurrentMark, true,                     \
1093           "Do unloading of classes with a concurrent marking cycle")        \
1094                                                                             \
1095   develop(bool, DisableStartThread, false,                                  \
1096           "Disable starting of additional Java threads "                    \
1097           "(for debugging only)")                                           \
1098                                                                             \
1099   develop(bool, MemProfiling, false,                                        \
1100           "Write memory usage profiling to log file")                       \
1101                                                                             \
1102   notproduct(bool, PrintSystemDictionaryAtExit, false,                      \
1103           "Print the system dictionary at exit")                            \
1104                                                                             \
1105   experimental(intx, PredictedLoadedClassCount, 0,                          \
1106           "Experimental: Tune loaded class cache starting size")            \
1107                                                                             \
1108   diagnostic(bool, UnsyncloadClass, false,                                  \
1109           "Unstable: VM calls loadClass unsynchronized. Custom "            \
1110           "class loader must call VM synchronized for findClass "           \
1111           "and defineClass.")                                               \
1112                                                                             \
1113   product(bool, AlwaysLockClassLoader, false,                               \
1114           "Require the VM to acquire the class loader lock before calling " \
1115           "loadClass() even for class loaders registering "                 \
1116           "as parallel capable")                                            \
1117                                                                             \
1118   product(bool, AllowParallelDefineClass, false,                            \
1119           "Allow parallel defineClass requests for class loaders "          \
1120           "registering as parallel capable")                                \
1121                                                                             \
1122   product(bool, MustCallLoadClassInternal, false,                           \
1123           "Call loadClassInternal() rather than loadClass()")               \
1124                                                                             \
1125   product_pd(bool, DontYieldALot,                                           \
1126           "Throw away obvious excess yield calls")                          \
1127                                                                             \
1128   product_pd(bool, ConvertSleepToYield,                                     \
1129           "Convert sleep(0) to thread yield "                               \
1130           "(may be off for Solaris to improve GUI)")                        \
1131                                                                             \
1132   product(bool, ConvertYieldToSleep, false,                                 \
1133           "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1134           "behavior")                                                       \
1135                                                                             \
1136   product(bool, UseBoundThreads, true,                                      \
1137           "Bind user level threads to kernel threads (for Solaris only)")   \
1138                                                                             \
1139   develop(bool, UseDetachedThreads, true,                                   \
1140           "Use detached threads that are recycled upon termination "        \
1141           "(for Solaris only)")                                             \
1142                                                                             \
1143   product(bool, UseLWPSynchronization, true,                                \
1144           "Use LWP-based instead of libthread-based synchronization "       \
1145           "(SPARC only)")                                                   \
1146                                                                             \
1147   experimental(ccstr, SyncKnobs, NULL,                                      \
1148                "(Unstable) Various monitor synchronization tunables")       \
1149                                                                             \
1150   experimental(intx, EmitSync, 0,                                           \
1151                "(Unsafe, Unstable) "                                        \
1152                "Control emission of inline sync fast-path code")            \
1153                                                                             \
1154   product(intx, MonitorBound, 0, "Bound Monitor population")                \
1155                                                                             \
1156   product(bool, MonitorInUseLists, false, "Track Monitors for Deflation")   \
1157                                                                             \
1158   experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) "                    \
1159                "Experimental Sync flags")                                   \
1160                                                                             \
1161   experimental(intx, SyncVerbose, 0, "(Unstable)")                          \
1162                                                                             \
1163   experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)")               \
1164                                                                             \
1165   experimental(intx, hashCode, 5,                                           \
1166                "(Unstable) select hashCode generation algorithm")           \
1167                                                                             \
1168   experimental(intx, WorkAroundNPTLTimedWaitHang, 1,                        \
1169                "(Unstable, Linux-specific) "                                \
1170                "avoid NPTL-FUTEX hang pthread_cond_timedwait")              \
1171                                                                             \
1172   product(bool, FilterSpuriousWakeups, true,                                \
1173           "When true prevents OS-level spurious, or premature, wakeups "    \
1174           "from Object.wait (Ignored for Windows)")                         \
1175                                                                             \
1176   product(intx, NativeMonitorTimeout, -1, "(Unstable)")                     \
1177                                                                             \
1178   product(intx, NativeMonitorFlags, 0, "(Unstable)")                        \
1179                                                                             \
1180   product(intx, NativeMonitorSpinLimit, 20, "(Unstable)")                   \
1181                                                                             \
1182   develop(bool, UsePthreads, false,                                         \
1183           "Use pthread-based instead of libthread-based synchronization "   \
1184           "(SPARC only)")                                                   \
1185                                                                             \
1186   product(bool, AdjustConcurrency, false,                                   \
1187           "Call thr_setconcurrency at thread creation time to avoid "       \
1188           "LWP starvation on MP systems (for Solaris Only)")                \
1189                                                                             \
1190   product(bool, ReduceSignalUsage, false,                                   \
1191           "Reduce the use of OS signals in Java and/or the VM")             \
1192                                                                             \
1193   develop_pd(bool, ShareVtableStubs,                                        \
1194           "Share vtable stubs (smaller code but worse branch prediction")   \
1195                                                                             \
1196   develop(bool, LoadLineNumberTables, true,                                 \
1197           "Tell whether the class file parser loads line number tables")    \
1198                                                                             \
1199   develop(bool, LoadLocalVariableTables, true,                              \
1200           "Tell whether the class file parser loads local variable tables") \
1201                                                                             \
1202   develop(bool, LoadLocalVariableTypeTables, true,                          \
1203           "Tell whether the class file parser loads local variable type"    \
1204           "tables")                                                         \
1205                                                                             \
1206   product(bool, AllowUserSignalHandlers, false,                             \
1207           "Do not complain if the application installs signal handlers "    \
1208           "(Solaris & Linux only)")                                         \
1209                                                                             \
1210   product(bool, UseSignalChaining, true,                                    \
1211           "Use signal-chaining to invoke signal handlers installed "        \
1212           "by the application (Solaris & Linux only)")                      \
1213                                                                             \
1214   product(bool, UseAltSigs, false,                                          \
1215           "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM "      \
1216           "internal signals (Solaris only)")                                \
1217                                                                             \
1218   product(bool, AllowJNIEnvProxy, false,                                    \
1219           "Allow JNIEnv proxies for jdbx")                                  \
1220                                                                             \
1221   product(bool, JNIDetachReleasesMonitors, true,                            \
1222           "JNI DetachCurrentThread releases monitors owned by thread")      \
1223                                                                             \
1224   product(bool, RestoreMXCSROnJNICalls, false,                              \
1225           "Restore MXCSR when returning from JNI calls")                    \
1226                                                                             \
1227   product(bool, CheckJNICalls, false,                                       \
1228           "Verify all arguments to JNI calls")                              \
1229                                                                             \
1230   product(bool, UseFastJNIAccessors, true,                                  \
1231           "Use optimized versions of Get<Primitive>Field")                  \
1232                                                                             \
1233   product(intx, MaxJNILocalCapacity, 65536,                                 \
1234           "Maximum allowable local JNI handle capacity to "                 \
1235           "EnsureLocalCapacity() and PushLocalFrame(), "                    \
1236           "where <= 0 is unlimited, default: 65536")                        \
1237                                                                             \
1238   product(bool, EagerXrunInit, false,                                       \
1239           "Eagerly initialize -Xrun libraries; allows startup profiling, "  \
1240           "but not all -Xrun libraries may support the state of the VM "    \
1241           "at this time")                                                   \
1242                                                                             \
1243   product(bool, PreserveAllAnnotations, false,                              \
1244           "Preserve RuntimeInvisibleAnnotations as well "                   \
1245           "as RuntimeVisibleAnnotations")                                   \
1246                                                                             \
1247   develop(uintx, PreallocatedOutOfMemoryErrorCount, 4,                      \
1248           "Number of OutOfMemoryErrors preallocated with backtrace")        \
1249                                                                             \
1250   product(bool, LazyBootClassLoader, true,                                  \
1251           "Enable/disable lazy opening of boot class path entries")         \
1252                                                                             \
1253   product(bool, UseXMMForArrayCopy, false,                                  \
1254           "Use SSE2 MOVQ instruction for Arraycopy")                        \
1255                                                                             \
1256   product(intx, FieldsAllocationStyle, 1,                                   \
1257           "0 - type based with oops first, 1 - with oops last, "            \
1258           "2 - oops in super and sub classes are together")                 \
1259                                                                             \
1260   product(bool, CompactFields, true,                                        \
1261           "Allocate nonstatic fields in gaps between previous fields")      \
1262                                                                             \
1263   notproduct(bool, PrintFieldLayout, false,                                 \
1264           "Print field layout for each class")                              \
1265                                                                             \
1266   product(intx, ContendedPaddingWidth, 128,                                 \
1267           "How many bytes to pad the fields/classes marked @Contended with")\
1268                                                                             \
1269   product(bool, EnableContended, true,                                      \
1270           "Enable @Contended annotation support")                           \
1271                                                                             \
1272   product(bool, RestrictContended, true,                                    \
1273           "Restrict @Contended to trusted classes")                         \
1274                                                                             \
1275   product(bool, UseBiasedLocking, true,                                     \
1276           "Enable biased locking in JVM")                                   \
1277                                                                             \
1278   product(intx, BiasedLockingStartupDelay, 4000,                            \
1279           "Number of milliseconds to wait before enabling biased locking")  \
1280                                                                             \
1281   diagnostic(bool, PrintBiasedLockingStatistics, false,                     \
1282           "Print statistics of biased locking in JVM")                      \
1283                                                                             \
1284   product(intx, BiasedLockingBulkRebiasThreshold, 20,                       \
1285           "Threshold of number of revocations per type to try to "          \
1286           "rebias all objects in the heap of that type")                    \
1287                                                                             \
1288   product(intx, BiasedLockingBulkRevokeThreshold, 40,                       \
1289           "Threshold of number of revocations per type to permanently "     \
1290           "revoke biases of all objects in the heap of that type")          \
1291                                                                             \
1292   product(intx, BiasedLockingDecayTime, 25000,                              \
1293           "Decay time (in milliseconds) to re-enable bulk rebiasing of a "  \
1294           "type after previous bulk rebias")                                \
1295                                                                             \
1296   /* tracing */                                                             \
1297                                                                             \
1298   notproduct(bool, TraceRuntimeCalls, false,                                \
1299           "Trace run-time calls")                                           \
1300                                                                             \
1301   develop(bool, TraceJNICalls, false,                                       \
1302           "Trace JNI calls")                                                \
1303                                                                             \
1304   develop(bool, StressRewriter, false,                                      \
1305           "Stress linktime bytecode rewriting")                             \
1306                                                                             \
1307   notproduct(bool, TraceJVMCalls, false,                                    \
1308           "Trace JVM calls")                                                \
1309                                                                             \
1310   product(ccstr, TraceJVMTI, NULL,                                          \
1311           "Trace flags for JVMTI functions and events")                     \
1312                                                                             \
1313   /* This option can change an EMCP method into an obsolete method. */      \
1314   /* This can affect tests that except specific methods to be EMCP. */      \
1315   /* This option should be used with caution. */                            \
1316   product(bool, StressLdcRewrite, false,                                    \
1317           "Force ldc -> ldc_w rewrite during RedefineClasses")              \
1318                                                                             \
1319   product(intx, TraceRedefineClasses, 0,                                    \
1320           "Trace level for JVMTI RedefineClasses")                          \
1321                                                                             \
1322   develop(bool, StressMethodComparator, false,                              \
1323           "Run the MethodComparator on all loaded methods")                 \
1324                                                                             \
1325   /* change to false by default sometime after Mustang */                   \
1326   product(bool, VerifyMergedCPBytecodes, true,                              \
1327           "Verify bytecodes after RedefineClasses constant pool merging")   \
1328                                                                             \
1329   develop(bool, TraceJNIHandleAllocation, false,                            \
1330           "Trace allocation/deallocation of JNI handle blocks")             \
1331                                                                             \
1332   develop(bool, TraceThreadEvents, false,                                   \
1333           "Trace all thread events")                                        \
1334                                                                             \
1335   develop(bool, TraceBytecodes, false,                                      \
1336           "Trace bytecode execution")                                       \
1337                                                                             \
1338   develop(bool, TraceClassInitialization, false,                            \
1339           "Trace class initialization")                                     \
1340                                                                             \
1341   develop(bool, TraceExceptions, false,                                     \
1342           "Trace exceptions")                                               \
1343                                                                             \
1344   develop(bool, TraceICs, false,                                            \
1345           "Trace inline cache changes")                                     \
1346                                                                             \
1347   notproduct(bool, TraceInvocationCounterOverflow, false,                   \
1348           "Trace method invocation counter overflow")                       \
1349                                                                             \
1350   develop(bool, TraceInlineCacheClearing, false,                            \
1351           "Trace clearing of inline caches in nmethods")                    \
1352                                                                             \
1353   develop(bool, TraceDependencies, false,                                   \
1354           "Trace dependencies")                                             \
1355                                                                             \
1356   develop(bool, VerifyDependencies, trueInDebug,                            \
1357           "Exercise and verify the compilation dependency mechanism")       \
1358                                                                             \
1359   develop(bool, TraceNewOopMapGeneration, false,                            \
1360           "Trace OopMapGeneration")                                         \
1361                                                                             \
1362   develop(bool, TraceNewOopMapGenerationDetailed, false,                    \
1363           "Trace OopMapGeneration: print detailed cell states")             \
1364                                                                             \
1365   develop(bool, TimeOopMap, false,                                          \
1366           "Time calls to GenerateOopMap::compute_map() in sum")             \
1367                                                                             \
1368   develop(bool, TimeOopMap2, false,                                         \
1369           "Time calls to GenerateOopMap::compute_map() individually")       \
1370                                                                             \
1371   develop(bool, TraceMonitorMismatch, false,                                \
1372           "Trace monitor matching failures during OopMapGeneration")        \
1373                                                                             \
1374   develop(bool, TraceOopMapRewrites, false,                                 \
1375           "Trace rewriting of method oops during oop map generation")       \
1376                                                                             \
1377   develop(bool, TraceSafepoint, false,                                      \
1378           "Trace safepoint operations")                                     \
1379                                                                             \
1380   develop(bool, TraceICBuffer, false,                                       \
1381           "Trace usage of IC buffer")                                       \
1382                                                                             \
1383   develop(bool, TraceCompiledIC, false,                                     \
1384           "Trace changes of compiled IC")                                   \
1385                                                                             \
1386   notproduct(bool, TraceZapDeadLocals, false,                               \
1387           "Trace zapping dead locals")                                      \
1388                                                                             \
1389   develop(bool, TraceStartupTime, false,                                    \
1390           "Trace setup time")                                               \
1391                                                                             \
1392   develop(bool, TraceProtectionDomainVerification, false,                   \
1393           "Trace protection domain verification")                           \
1394                                                                             \
1395   develop(bool, TraceClearedExceptions, false,                              \
1396           "Print when an exception is forcibly cleared")                    \
1397                                                                             \
1398   product(bool, TraceClassResolution, false,                                \
1399           "Trace all constant pool resolutions (for debugging)")            \
1400                                                                             \
1401   product(bool, TraceBiasedLocking, false,                                  \
1402           "Trace biased locking in JVM")                                    \
1403                                                                             \
1404   product(bool, TraceMonitorInflation, false,                               \
1405           "Trace monitor inflation in JVM")                                 \
1406                                                                             \
1407   /* gc */                                                                  \
1408                                                                             \
1409   product(bool, UseSerialGC, false,                                         \
1410           "Use the Serial garbage collector")                               \
1411                                                                             \
1412   product(bool, UseG1GC, false,                                             \
1413           "Use the Garbage-First garbage collector")                        \
1414                                                                             \
1415   product(bool, UseParallelGC, false,                                       \
1416           "Use the Parallel Scavenge garbage collector")                    \
1417                                                                             \
1418   product(bool, UseParallelOldGC, false,                                    \
1419           "Use the Parallel Old garbage collector")                         \
1420                                                                             \
1421   product(uintx, HeapMaximumCompactionInterval, 20,                         \
1422           "How often should we maximally compact the heap (not allowing "   \
1423           "any dead space)")                                                \
1424                                                                             \
1425   product(uintx, HeapFirstMaximumCompactionCount, 3,                        \
1426           "The collection count for the first maximum compaction")          \
1427                                                                             \
1428   product(bool, UseMaximumCompactionOnSystemGC, true,                       \
1429           "Use maximum compaction in the Parallel Old garbage collector "   \
1430           "for a system GC")                                                \
1431                                                                             \
1432   product(uintx, ParallelOldDeadWoodLimiterMean, 50,                        \
1433           "The mean used by the parallel compact dead wood "                \
1434           "limiter (a number between 0-100)")                               \
1435                                                                             \
1436   product(uintx, ParallelOldDeadWoodLimiterStdDev, 80,                      \
1437           "The standard deviation used by the parallel compact dead wood "  \
1438           "limiter (a number between 0-100)")                               \
1439                                                                             \
1440   product(uintx, ParallelGCThreads, 0,                                      \
1441           "Number of parallel threads parallel gc will use")                \
1442                                                                             \
1443   product(bool, UseDynamicNumberOfGCThreads, false,                         \
1444           "Dynamically choose the number of parallel threads "              \
1445           "parallel gc will use")                                           \
1446                                                                             \
1447   diagnostic(bool, ForceDynamicNumberOfGCThreads, false,                    \
1448           "Force dynamic selection of the number of "                       \
1449           "parallel threads parallel gc will use to aid debugging")         \
1450                                                                             \
1451   product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M),               \
1452           "Size of heap (bytes) per GC thread used in calculating the "     \
1453           "number of GC threads")                                           \
1454                                                                             \
1455   product(bool, TraceDynamicGCThreads, false,                               \
1456           "Trace the dynamic GC thread usage")                              \
1457                                                                             \
1458   develop(bool, ParallelOldGCSplitALot, false,                              \
1459           "Provoke splitting (copying data from a young gen space to "      \
1460           "multiple destination spaces)")                                   \
1461                                                                             \
1462   develop(uintx, ParallelOldGCSplitInterval, 3,                             \
1463           "How often to provoke splitting a young gen space")               \
1464                                                                             \
1465   product(uintx, ConcGCThreads, 0,                                          \
1466           "Number of threads concurrent gc will use")                       \
1467                                                                             \
1468   product(uintx, YoungPLABSize, 4096,                                       \
1469           "Size of young gen promotion LAB's (in HeapWords)")               \
1470                                                                             \
1471   product(uintx, OldPLABSize, 1024,                                         \
1472           "Size of old gen promotion LAB's (in HeapWords)")                 \
1473                                                                             \
1474   product(uintx, GCTaskTimeStampEntries, 200,                               \
1475           "Number of time stamp entries per gc worker thread")              \
1476                                                                             \
1477   product(bool, AlwaysTenure, false,                                        \
1478           "Always tenure objects in eden (ParallelGC only)")                \
1479                                                                             \
1480   product(bool, NeverTenure, false,                                         \
1481           "Never tenure objects in eden, may tenure on overflow "           \
1482           "(ParallelGC only)")                                              \
1483                                                                             \
1484   product(bool, ScavengeBeforeFullGC, true,                                 \
1485           "Scavenge youngest generation before each full GC.")              \
1486                                                                             \
1487   develop(bool, ScavengeWithObjectsInToSpace, false,                        \
1488           "Allow scavenges to occur when to-space contains objects")        \
1489                                                                             \
1490   product(bool, UseConcMarkSweepGC, false,                                  \
1491           "Use Concurrent Mark-Sweep GC in the old generation")             \
1492                                                                             \
1493   product(bool, ExplicitGCInvokesConcurrent, false,                         \
1494           "A System.gc() request invokes a concurrent collection; "         \
1495           "(effective only when UseConcMarkSweepGC)")                       \
1496                                                                             \
1497   product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false,        \
1498           "A System.gc() request invokes a concurrent collection and "      \
1499           "also unloads classes during such a concurrent gc cycle "         \
1500           "(effective only when UseConcMarkSweepGC)")                       \
1501                                                                             \
1502   product(bool, GCLockerInvokesConcurrent, false,                           \
1503           "The exit of a JNI critical section necessitating a scavenge, "   \
1504           "also kicks off a background concurrent collection")              \
1505                                                                             \
1506   product(uintx, GCLockerEdenExpansionPercent, 5,                           \
1507           "How much the GC can expand the eden by while the GC locker "     \
1508           "is active (as a percentage)")                                    \
1509                                                                             \
1510   diagnostic(intx, GCLockerRetryAllocationCount, 2,                         \
1511           "Number of times to retry allocations when "                      \
1512           "blocked by the GC locker")                                       \
1513                                                                             \
1514   develop(bool, UseCMSAdaptiveFreeLists, true,                              \
1515           "Use adaptive free lists in the CMS generation")                  \
1516                                                                             \
1517   develop(bool, UseAsyncConcMarkSweepGC, true,                              \
1518           "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1519                                                                             \
1520   develop(bool, RotateCMSCollectionTypes, false,                            \
1521           "Rotate the CMS collections among concurrent and STW")            \
1522                                                                             \
1523   product(bool, UseCMSBestFit, true,                                        \
1524           "Use CMS best fit allocation strategy")                           \
1525                                                                             \
1526   product(bool, UseCMSCollectionPassing, true,                              \
1527           "Use passing of collection from background to foreground")        \
1528                                                                             \
1529   product(bool, UseParNewGC, false,                                         \
1530           "Use parallel threads in the new generation")                     \
1531                                                                             \
1532   product(bool, PrintTaskqueue, false,                                      \
1533           "Print taskqueue statistics for parallel collectors")             \
1534                                                                             \
1535   product(bool, PrintTerminationStats, false,                               \
1536           "Print termination statistics for parallel collectors")           \
1537                                                                             \
1538   product(uintx, ParallelGCBufferWastePct, 10,                              \
1539           "Wasted fraction of parallel allocation buffer")                  \
1540                                                                             \
1541   diagnostic(bool, ParallelGCRetainPLAB, false,                             \
1542           "Retain parallel allocation buffers across scavenges; "           \
1543           "it is disabled because this currently conflicts with "           \
1544           "parallel card scanning under certain conditions.")               \
1545                                                                             \
1546   product(uintx, TargetPLABWastePct, 10,                                    \
1547           "Target wasted space in last buffer as percent of overall "       \
1548           "allocation")                                                     \
1549                                                                             \
1550   product(uintx, PLABWeight, 75,                                            \
1551           "Percentage (0-100) used to weight the current sample when "      \
1552           "computing exponentially decaying average for ResizePLAB")        \
1553                                                                             \
1554   product(bool, ResizePLAB, true,                                           \
1555           "Dynamically resize (survivor space) promotion LAB's")            \
1556                                                                             \
1557   product(bool, PrintPLAB, false,                                           \
1558           "Print (survivor space) promotion LAB's sizing decisions")        \
1559                                                                             \
1560   product(intx, ParGCArrayScanChunk, 50,                                    \
1561           "Scan a subset of object array and push remainder, if array is "  \
1562           "bigger than this")                                               \
1563                                                                             \
1564   product(bool, ParGCUseLocalOverflow, false,                               \
1565           "Instead of a global overflow list, use local overflow stacks")   \
1566                                                                             \
1567   product(bool, ParGCTrimOverflow, true,                                    \
1568           "Eagerly trim the local overflow lists "                          \
1569           "(when ParGCUseLocalOverflow)")                                   \
1570                                                                             \
1571   notproduct(bool, ParGCWorkQueueOverflowALot, false,                       \
1572           "Simulate work queue overflow in ParNew")                         \
1573                                                                             \
1574   notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000,                   \
1575           "An `interval' counter that determines how frequently "           \
1576           "we simulate overflow; a smaller number increases frequency")     \
1577                                                                             \
1578   product(uintx, ParGCDesiredObjsFromOverflowList, 20,                      \
1579           "The desired number of objects to claim from the overflow list")  \
1580                                                                             \
1581   diagnostic(uintx, ParGCStridesPerThread, 2,                               \
1582           "The number of strides per worker thread that we divide up the "  \
1583           "card table scanning work into")                                  \
1584                                                                             \
1585   diagnostic(intx, ParGCCardsPerStrideChunk, 256,                           \
1586           "The number of cards in each chunk of the parallel chunks used "  \
1587           "during card table scanning")                                     \
1588                                                                             \
1589   product(uintx, CMSParPromoteBlocksToClaim, 16,                            \
1590           "Number of blocks to attempt to claim when refilling CMS LAB's "  \
1591           "for parallel GC")                                                \
1592                                                                             \
1593   product(uintx, OldPLABWeight, 50,                                         \
1594           "Percentage (0-100) used to weight the current sample when "      \
1595           "computing exponentially decaying average for resizing "          \
1596           "CMSParPromoteBlocksToClaim")                                     \
1597                                                                             \
1598   product(bool, ResizeOldPLAB, true,                                        \
1599           "Dynamically resize (old gen) promotion LAB's")                   \
1600                                                                             \
1601   product(bool, PrintOldPLAB, false,                                        \
1602           "Print (old gen) promotion LAB's sizing decisions")               \
1603                                                                             \
1604   product(uintx, CMSOldPLABMin, 16,                                         \
1605           "Minimum size of CMS gen promotion LAB caches per worker "        \
1606           "per block size")                                                 \
1607                                                                             \
1608   product(uintx, CMSOldPLABMax, 1024,                                       \
1609           "Maximum size of CMS gen promotion LAB caches per worker "        \
1610           "per block size")                                                 \
1611                                                                             \
1612   product(uintx, CMSOldPLABNumRefills, 4,                                   \
1613           "Nominal number of refills of CMS gen promotion LAB cache "       \
1614           "per worker per block size")                                      \
1615                                                                             \
1616   product(bool, CMSOldPLABResizeQuicker, false,                             \
1617           "React on-the-fly during a scavenge to a sudden "                 \
1618           "change in block demand rate")                                    \
1619                                                                             \
1620   product(uintx, CMSOldPLABToleranceFactor, 4,                              \
1621           "The tolerance of the phase-change detector for on-the-fly "      \
1622           "PLAB resizing during a scavenge")                                \
1623                                                                             \
1624   product(uintx, CMSOldPLABReactivityFactor, 2,                             \
1625           "The gain in the feedback loop for on-the-fly PLAB resizing "     \
1626           "during a scavenge")                                              \
1627                                                                             \
1628   product(bool, AlwaysPreTouch, false,                                      \
1629           "Force all freshly committed pages to be pre-touched")            \
1630                                                                             \
1631   product_pd(uintx, CMSYoungGenPerWorker,                                   \
1632           "The maximum size of young gen chosen by default per GC worker "  \
1633           "thread available")                                               \
1634                                                                             \
1635   product(bool, CMSIncrementalMode, false,                                  \
1636           "Whether CMS GC should operate in \"incremental\" mode")          \
1637                                                                             \
1638   product(uintx, CMSIncrementalDutyCycle, 10,                               \
1639           "Percentage (0-100) of CMS incremental mode duty cycle. If "      \
1640           "CMSIncrementalPacing is enabled, then this is just the initial " \
1641           "value.")                                                         \
1642                                                                             \
1643   product(bool, CMSIncrementalPacing, true,                                 \
1644           "Whether the CMS incremental mode duty cycle should be "          \
1645           "automatically adjusted")                                         \
1646                                                                             \
1647   product(uintx, CMSIncrementalDutyCycleMin, 0,                             \
1648           "Minimum percentage (0-100) of the CMS incremental duty cycle "   \
1649           "used when CMSIncrementalPacing is enabled")                      \
1650                                                                             \
1651   product(uintx, CMSIncrementalSafetyFactor, 10,                            \
1652           "Percentage (0-100) used to add conservatism when computing the " \
1653           "duty cycle")                                                     \
1654                                                                             \
1655   product(uintx, CMSIncrementalOffset, 0,                                   \
1656           "Percentage (0-100) by which the CMS incremental mode duty cycle "\
1657           "is shifted to the right within the period between young GCs")    \
1658                                                                             \
1659   product(uintx, CMSExpAvgFactor, 50,                                       \
1660           "Percentage (0-100) used to weight the current sample when "      \
1661           "computing exponential averages for CMS statistics")              \
1662                                                                             \
1663   product(uintx, CMS_FLSWeight, 75,                                         \
1664           "Percentage (0-100) used to weight the current sample when "      \
1665           "computing exponentially decaying averages for CMS FLS "          \
1666           "statistics")                                                     \
1667                                                                             \
1668   product(uintx, CMS_FLSPadding, 1,                                         \
1669           "The multiple of deviation from mean to use for buffering "       \
1670           "against volatility in free list demand")                         \
1671                                                                             \
1672   product(uintx, FLSCoalescePolicy, 2,                                      \
1673           "CMS: aggressiveness level for coalescing, increasing "           \
1674           "from 0 to 4")                                                    \
1675                                                                             \
1676   product(bool, FLSAlwaysCoalesceLarge, false,                              \
1677           "CMS: larger free blocks are always available for coalescing")    \
1678                                                                             \
1679   product(double, FLSLargestBlockCoalesceProximity, 0.99,                   \
1680           "CMS: the smaller the percentage the greater the coalescing "     \
1681           "force")                                                          \
1682                                                                             \
1683   product(double, CMSSmallCoalSurplusPercent, 1.05,                         \
1684           "CMS: the factor by which to inflate estimated demand of small "  \
1685           "block sizes to prevent coalescing with an adjoining block")      \
1686                                                                             \
1687   product(double, CMSLargeCoalSurplusPercent, 0.95,                         \
1688           "CMS: the factor by which to inflate estimated demand of large "  \
1689           "block sizes to prevent coalescing with an adjoining block")      \
1690                                                                             \
1691   product(double, CMSSmallSplitSurplusPercent, 1.10,                        \
1692           "CMS: the factor by which to inflate estimated demand of small "  \
1693           "block sizes to prevent splitting to supply demand for smaller "  \
1694           "blocks")                                                         \
1695                                                                             \
1696   product(double, CMSLargeSplitSurplusPercent, 1.00,                        \
1697           "CMS: the factor by which to inflate estimated demand of large "  \
1698           "block sizes to prevent splitting to supply demand for smaller "  \
1699           "blocks")                                                         \
1700                                                                             \
1701   product(bool, CMSExtrapolateSweep, false,                                 \
1702           "CMS: cushion for block demand during sweep")                     \
1703                                                                             \
1704   product(uintx, CMS_SweepWeight, 75,                                       \
1705           "Percentage (0-100) used to weight the current sample when "      \
1706           "computing exponentially decaying average for inter-sweep "       \
1707           "duration")                                                       \
1708                                                                             \
1709   product(uintx, CMS_SweepPadding, 1,                                       \
1710           "The multiple of deviation from mean to use for buffering "       \
1711           "against volatility in inter-sweep duration")                     \
1712                                                                             \
1713   product(uintx, CMS_SweepTimerThresholdMillis, 10,                         \
1714           "Skip block flux-rate sampling for an epoch unless inter-sweep "  \
1715           "duration exceeds this threshold in milliseconds")                \
1716                                                                             \
1717   develop(bool, CMSTraceIncrementalMode, false,                             \
1718           "Trace CMS incremental mode")                                     \
1719                                                                             \
1720   develop(bool, CMSTraceIncrementalPacing, false,                           \
1721           "Trace CMS incremental mode pacing computation")                  \
1722                                                                             \
1723   develop(bool, CMSTraceThreadState, false,                                 \
1724           "Trace the CMS thread state (enable the trace_state() method)")   \
1725                                                                             \
1726   product(bool, CMSClassUnloadingEnabled, true,                             \
1727           "Whether class unloading enabled when using CMS GC")              \
1728                                                                             \
1729   product(uintx, CMSClassUnloadingMaxInterval, 0,                           \
1730           "When CMS class unloading is enabled, the maximum CMS cycle "     \
1731           "count for which classes may not be unloaded")                    \
1732                                                                             \
1733   product(bool, CMSCompactWhenClearAllSoftRefs, true,                       \
1734           "Compact when asked to collect CMS gen with "                     \
1735           "clear_all_soft_refs()")                                          \
1736                                                                             \
1737   product(bool, UseCMSCompactAtFullCollection, true,                        \
1738           "Use Mark-Sweep-Compact algorithm at full collections")           \
1739                                                                             \
1740   product(uintx, CMSFullGCsBeforeCompaction, 0,                             \
1741           "Number of CMS full collection done before compaction if > 0")    \
1742                                                                             \
1743   develop(intx, CMSDictionaryChoice, 0,                                     \
1744           "Use BinaryTreeDictionary as default in the CMS generation")      \
1745                                                                             \
1746   product(uintx, CMSIndexedFreeListReplenish, 4,                            \
1747           "Replenish an indexed free list with this number of chunks")      \
1748                                                                             \
1749   product(bool, CMSReplenishIntermediate, true,                             \
1750           "Replenish all intermediate free-list caches")                    \
1751                                                                             \
1752   product(bool, CMSSplitIndexedFreeListBlocks, true,                        \
1753           "When satisfying batched demand, split blocks from the "          \
1754           "IndexedFreeList whose size is a multiple of requested size")     \
1755                                                                             \
1756   product(bool, CMSLoopWarn, false,                                         \
1757           "Warn in case of excessive CMS looping")                          \
1758                                                                             \
1759   develop(bool, CMSOverflowEarlyRestoration, false,                         \
1760           "Restore preserved marks early")                                  \
1761                                                                             \
1762   product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M),              \
1763           "Size of marking stack")                                          \
1764                                                                             \
1765   product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M),          \
1766           "Maximum size of marking stack")                                  \
1767                                                                             \
1768   notproduct(bool, CMSMarkStackOverflowALot, false,                         \
1769           "Simulate frequent marking stack / work queue overflow")          \
1770                                                                             \
1771   notproduct(uintx, CMSMarkStackOverflowInterval, 1000,                     \
1772           "An \"interval\" counter that determines how frequently "         \
1773           "to simulate overflow; a smaller number increases frequency")     \
1774                                                                             \
1775   product(uintx, CMSMaxAbortablePrecleanLoops, 0,                           \
1776           "Maximum number of abortable preclean iterations, if > 0")        \
1777                                                                             \
1778   product(intx, CMSMaxAbortablePrecleanTime, 5000,                          \
1779           "Maximum time in abortable preclean (in milliseconds)")           \
1780                                                                             \
1781   product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100,              \
1782           "Nominal minimum work per abortable preclean iteration")          \
1783                                                                             \
1784   manageable(intx, CMSAbortablePrecleanWaitMillis, 100,                     \
1785           "Time that we sleep between iterations when not given "           \
1786           "enough work per iteration")                                      \
1787                                                                             \
1788   product(uintx, CMSRescanMultiple, 32,                                     \
1789           "Size (in cards) of CMS parallel rescan task")                    \
1790                                                                             \
1791   product(uintx, CMSConcMarkMultiple, 32,                                   \
1792           "Size (in cards) of CMS concurrent MT marking task")              \
1793                                                                             \
1794   product(bool, CMSAbortSemantics, false,                                   \
1795           "Whether abort-on-overflow semantics is implemented")             \
1796                                                                             \
1797   product(bool, CMSParallelInitialMarkEnabled, true,                        \
1798           "Use the parallel initial mark.")                                 \
1799                                                                             \
1800   product(bool, CMSParallelRemarkEnabled, true,                             \
1801           "Whether parallel remark enabled (only if ParNewGC)")             \
1802                                                                             \
1803   product(bool, CMSParallelSurvivorRemarkEnabled, true,                     \
1804           "Whether parallel remark of survivor space "                      \
1805           "enabled (effective only if CMSParallelRemarkEnabled)")           \
1806                                                                             \
1807   product(bool, CMSPLABRecordAlways, true,                                  \
1808           "Always record survivor space PLAB boundaries (effective only "   \
1809           "if CMSParallelSurvivorRemarkEnabled)")                           \
1810                                                                             \
1811   product(bool, CMSEdenChunksRecordAlways, true,                            \
1812           "Always record eden chunks used for the parallel initial mark "   \
1813           "or remark of eden")                                              \
1814                                                                             \
1815   product(bool, CMSPrintEdenSurvivorChunks, false,                          \
1816           "Print the eden and the survivor chunks used for the parallel "   \
1817           "initial mark or remark of the eden/survivor spaces")             \
1818                                                                             \
1819   product(bool, CMSConcurrentMTEnabled, true,                               \
1820           "Whether multi-threaded concurrent work enabled "                 \
1821           "(effective only if ParNewGC)")                                   \
1822                                                                             \
1823   product(bool, CMSPrecleaningEnabled, true,                                \
1824           "Whether concurrent precleaning enabled")                         \
1825                                                                             \
1826   product(uintx, CMSPrecleanIter, 3,                                        \
1827           "Maximum number of precleaning iteration passes")                 \
1828                                                                             \
1829   product(uintx, CMSPrecleanNumerator, 2,                                   \
1830           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1831           "ratio")                                                          \
1832                                                                             \
1833   product(uintx, CMSPrecleanDenominator, 3,                                 \
1834           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1835           "ratio")                                                          \
1836                                                                             \
1837   product(bool, CMSPrecleanRefLists1, true,                                 \
1838           "Preclean ref lists during (initial) preclean phase")             \
1839                                                                             \
1840   product(bool, CMSPrecleanRefLists2, false,                                \
1841           "Preclean ref lists during abortable preclean phase")             \
1842                                                                             \
1843   product(bool, CMSPrecleanSurvivors1, false,                               \
1844           "Preclean survivors during (initial) preclean phase")             \
1845                                                                             \
1846   product(bool, CMSPrecleanSurvivors2, true,                                \
1847           "Preclean survivors during abortable preclean phase")             \
1848                                                                             \
1849   product(uintx, CMSPrecleanThreshold, 1000,                                \
1850           "Do not iterate again if number of dirty cards is less than this")\
1851                                                                             \
1852   product(bool, CMSCleanOnEnter, true,                                      \
1853           "Clean-on-enter optimization for reducing number of dirty cards") \
1854                                                                             \
1855   product(uintx, CMSRemarkVerifyVariant, 1,                                 \
1856           "Choose variant (1,2) of verification following remark")          \
1857                                                                             \
1858   product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M,                   \
1859           "If Eden size is below this, do not try to schedule remark")      \
1860                                                                             \
1861   product(uintx, CMSScheduleRemarkEdenPenetration, 50,                      \
1862           "The Eden occupancy percentage (0-100) at which "                 \
1863           "to try and schedule remark pause")                               \
1864                                                                             \
1865   product(uintx, CMSScheduleRemarkSamplingRatio, 5,                         \
1866           "Start sampling eden top at least before young gen "              \
1867           "occupancy reaches 1/<ratio> of the size at which "               \
1868           "we plan to schedule remark")                                     \
1869                                                                             \
1870   product(uintx, CMSSamplingGrain, 16*K,                                    \
1871           "The minimum distance between eden samples for CMS (see above)")  \
1872                                                                             \
1873   product(bool, CMSScavengeBeforeRemark, false,                             \
1874           "Attempt scavenge before the CMS remark step")                    \
1875                                                                             \
1876   develop(bool, CMSTraceSweeper, false,                                     \
1877           "Trace some actions of the CMS sweeper")                          \
1878                                                                             \
1879   product(uintx, CMSWorkQueueDrainThreshold, 10,                            \
1880           "Don't drain below this size per parallel worker/thief")          \
1881                                                                             \
1882   manageable(intx, CMSWaitDuration, 2000,                                   \
1883           "Time in milliseconds that CMS thread waits for young GC")        \
1884                                                                             \
1885   develop(uintx, CMSCheckInterval, 1000,                                    \
1886           "Interval in milliseconds that CMS thread checks if it "          \
1887           "should start a collection cycle")                                \
1888                                                                             \
1889   product(bool, CMSYield, true,                                             \
1890           "Yield between steps of CMS")                                     \
1891                                                                             \
1892   product(uintx, CMSBitMapYieldQuantum, 10*M,                               \
1893           "Bitmap operations should process at most this many bits "        \
1894           "between yields")                                                 \
1895                                                                             \
1896   product(bool, CMSDumpAtPromotionFailure, false,                           \
1897           "Dump useful information about the state of the CMS old "         \
1898           "generation upon a promotion failure")                            \
1899                                                                             \
1900   product(bool, CMSPrintChunksInDump, false,                                \
1901           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1902           "more detailed information about the free chunks")                \
1903                                                                             \
1904   product(bool, CMSPrintObjectsInDump, false,                               \
1905           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1906           "more detailed information about the allocated objects")          \
1907                                                                             \
1908   diagnostic(bool, FLSVerifyAllHeapReferences, false,                       \
1909           "Verify that all references across the FLS boundary "             \
1910           "are to valid objects")                                           \
1911                                                                             \
1912   diagnostic(bool, FLSVerifyLists, false,                                   \
1913           "Do lots of (expensive) FreeListSpace verification")              \
1914                                                                             \
1915   diagnostic(bool, FLSVerifyIndexTable, false,                              \
1916           "Do lots of (expensive) FLS index table verification")            \
1917                                                                             \
1918   develop(bool, FLSVerifyDictionary, false,                                 \
1919           "Do lots of (expensive) FLS dictionary verification")             \
1920                                                                             \
1921   develop(bool, VerifyBlockOffsetArray, false,                              \
1922           "Do (expensive) block offset array verification")                 \
1923                                                                             \
1924   diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false,              \
1925           "Maintain _unallocated_block in BlockOffsetArray "                \
1926           "(currently applicable only to CMS collector)")                   \
1927                                                                             \
1928   develop(bool, TraceCMSState, false,                                       \
1929           "Trace the state of the CMS collection")                          \
1930                                                                             \
1931   product(intx, RefDiscoveryPolicy, 0,                                      \
1932           "Select type of reference discovery policy: "                     \
1933           "reference-based(0) or referent-based(1)")                        \
1934                                                                             \
1935   product(bool, ParallelRefProcEnabled, false,                              \
1936           "Enable parallel reference processing whenever possible")         \
1937                                                                             \
1938   product(bool, ParallelRefProcBalancingEnabled, true,                      \
1939           "Enable balancing of reference processing queues")                \
1940                                                                             \
1941   product(uintx, CMSTriggerRatio, 80,                                       \
1942           "Percentage of MinHeapFreeRatio in CMS generation that is "       \
1943           "allocated before a CMS collection cycle commences")              \
1944                                                                             \
1945   product(uintx, CMSBootstrapOccupancy, 50,                                 \
1946           "Percentage CMS generation occupancy at which to "                \
1947           "initiate CMS collection for bootstrapping collection stats")     \
1948                                                                             \
1949   product(intx, CMSInitiatingOccupancyFraction, -1,                         \
1950           "Percentage CMS generation occupancy to start a CMS collection "  \
1951           "cycle. A negative value means that CMSTriggerRatio is used")     \
1952                                                                             \
1953   product(uintx, InitiatingHeapOccupancyPercent, 45,                        \
1954           "Percentage of the (entire) heap occupancy to start a "           \
1955           "concurrent GC cycle. It is used by GCs that trigger a "          \
1956           "concurrent GC cycle based on the occupancy of the entire heap, " \
1957           "not just one of the generations (e.g., G1). A value of 0 "       \
1958           "denotes 'do constant GC cycles'.")                               \
1959                                                                             \
1960   manageable(intx, CMSTriggerInterval, -1,                                  \
1961           "Commence a CMS collection cycle (at least) every so many "       \
1962           "milliseconds (0 permanently, -1 disabled)")                      \
1963                                                                             \
1964   product(bool, UseCMSInitiatingOccupancyOnly, false,                       \
1965           "Only use occupancy as a criterion for starting a CMS collection")\
1966                                                                             \
1967   product(uintx, CMSIsTooFullPercentage, 98,                                \
1968           "An absolute ceiling above which CMS will always consider the "   \
1969           "unloading of classes when class unloading is enabled")           \
1970                                                                             \
1971   develop(bool, CMSTestInFreeList, false,                                   \
1972           "Check if the coalesced range is already in the "                 \
1973           "free lists as claimed")                                          \
1974                                                                             \
1975   notproduct(bool, CMSVerifyReturnedBytes, false,                           \
1976           "Check that all the garbage collected was returned to the "       \
1977           "free lists")                                                     \
1978                                                                             \
1979   notproduct(bool, ScavengeALot, false,                                     \
1980           "Force scavenge at every Nth exit from the runtime system "       \
1981           "(N=ScavengeALotInterval)")                                       \
1982                                                                             \
1983   develop(bool, FullGCALot, false,                                          \
1984           "Force full gc at every Nth exit from the runtime system "        \
1985           "(N=FullGCALotInterval)")                                         \
1986                                                                             \
1987   notproduct(bool, GCALotAtAllSafepoints, false,                            \
1988           "Enforce ScavengeALot/GCALot at all potential safepoints")        \
1989                                                                             \
1990   product(bool, PrintPromotionFailure, false,                               \
1991           "Print additional diagnostic information following "              \
1992           "promotion failure")                                              \
1993                                                                             \
1994   notproduct(bool, PromotionFailureALot, false,                             \
1995           "Use promotion failure handling on every youngest generation "    \
1996           "collection")                                                     \
1997                                                                             \
1998   develop(uintx, PromotionFailureALotCount, 1000,                           \
1999           "Number of promotion failures occurring at ParGCAllocBuffer "     \
2000           "refill attempts (ParNew) or promotion attempts "                 \
2001           "(other young collectors)")                                       \
2002                                                                             \
2003   develop(uintx, PromotionFailureALotInterval, 5,                           \
2004           "Total collections between promotion failures a lot")             \
2005                                                                             \
2006   experimental(uintx, WorkStealingSleepMillis, 1,                           \
2007           "Sleep time when sleep is used for yields")                       \
2008                                                                             \
2009   experimental(uintx, WorkStealingYieldsBeforeSleep, 5000,                  \
2010           "Number of yields before a sleep is done during work stealing")   \
2011                                                                             \
2012   experimental(uintx, WorkStealingHardSpins, 4096,                          \
2013           "Number of iterations in a spin loop between checks on "          \
2014           "time out of hard spin")                                          \
2015                                                                             \
2016   experimental(uintx, WorkStealingSpinToYieldRatio, 10,                     \
2017           "Ratio of hard spins to calls to yield")                          \
2018                                                                             \
2019   develop(uintx, ObjArrayMarkingStride, 512,                                \
2020           "Number of object array elements to push onto the marking stack " \
2021           "before pushing a continuation entry")                            \
2022                                                                             \
2023   develop(bool, MetadataAllocationFailALot, false,                          \
2024           "Fail metadata allocations at intervals controlled by "           \
2025           "MetadataAllocationFailALotInterval")                             \
2026                                                                             \
2027   develop(uintx, MetadataAllocationFailALotInterval, 1000,                  \
2028           "Metadata allocation failure a lot interval")                     \
2029                                                                             \
2030   develop(bool, TraceMetadataChunkAllocation, false,                        \
2031           "Trace chunk metadata allocations")                               \
2032                                                                             \
2033   product(bool, TraceMetadataHumongousAllocation, false,                    \
2034           "Trace humongous metadata allocations")                           \
2035                                                                             \
2036   develop(bool, TraceMetavirtualspaceAllocation, false,                     \
2037           "Trace virtual space metadata allocations")                       \
2038                                                                             \
2039   notproduct(bool, ExecuteInternalVMTests, false,                           \
2040           "Enable execution of internal VM tests")                          \
2041                                                                             \
2042   notproduct(bool, VerboseInternalVMTests, false,                           \
2043           "Turn on logging for internal VM tests.")                         \
2044                                                                             \
2045   product_pd(bool, UseTLAB, "Use thread-local object allocation")           \
2046                                                                             \
2047   product_pd(bool, ResizeTLAB,                                              \
2048           "Dynamically resize TLAB size for threads")                       \
2049                                                                             \
2050   product(bool, ZeroTLAB, false,                                            \
2051           "Zero out the newly created TLAB")                                \
2052                                                                             \
2053   product(bool, FastTLABRefill, true,                                       \
2054           "Use fast TLAB refill code")                                      \
2055                                                                             \
2056   product(bool, PrintTLAB, false,                                           \
2057           "Print various TLAB related information")                         \
2058                                                                             \
2059   product(bool, TLABStats, true,                                            \
2060           "Provide more detailed and expensive TLAB statistics "            \
2061           "(with PrintTLAB)")                                               \
2062                                                                             \
2063   EMBEDDED_ONLY(product(bool, LowMemoryProtection, true,                    \
2064           "Enable LowMemoryProtection"))                                    \
2065                                                                             \
2066   product_pd(bool, NeverActAsServerClassMachine,                            \
2067           "Never act like a server-class machine")                          \
2068                                                                             \
2069   product(bool, AlwaysActAsServerClassMachine, false,                       \
2070           "Always act like a server-class machine")                         \
2071                                                                             \
2072   product_pd(uint64_t, MaxRAM,                                              \
2073           "Real memory size (in bytes) used to set maximum heap size")      \
2074                                                                             \
2075   product(uintx, ErgoHeapSizeLimit, 0,                                      \
2076           "Maximum ergonomically set heap size (in bytes); zero means use " \
2077           "MaxRAM / MaxRAMFraction")                                        \
2078                                                                             \
2079   product(uintx, MaxRAMFraction, 4,                                         \
2080           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2081           "size")                                                           \
2082                                                                             \
2083   product(uintx, DefaultMaxRAMFraction, 4,                                  \
2084           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2085           "size; deprecated: to be renamed to MaxRAMFraction")              \
2086                                                                             \
2087   product(uintx, MinRAMFraction, 2,                                         \
2088           "Minimum fraction (1/n) of real memory used for maximum heap "    \
2089           "size on systems with small physical memory size")                \
2090                                                                             \
2091   product(uintx, InitialRAMFraction, 64,                                    \
2092           "Fraction (1/n) of real memory used for initial heap size")       \
2093                                                                             \
2094   develop(uintx, MaxVirtMemFraction, 2,                                     \
2095           "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2096           "determining maximum heap size")                                  \
2097                                                                             \
2098   product(bool, UseAutoGCSelectPolicy, false,                               \
2099           "Use automatic collection selection policy")                      \
2100                                                                             \
2101   product(uintx, AutoGCSelectPauseMillis, 5000,                             \
2102           "Automatic GC selection pause threshold in milliseconds")         \
2103                                                                             \
2104   product(bool, UseAdaptiveSizePolicy, true,                                \
2105           "Use adaptive generation sizing policies")                        \
2106                                                                             \
2107   product(bool, UsePSAdaptiveSurvivorSizePolicy, true,                      \
2108           "Use adaptive survivor sizing policies")                          \
2109                                                                             \
2110   product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true,     \
2111           "Use adaptive young-old sizing policies at minor collections")    \
2112                                                                             \
2113   product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true,     \
2114           "Use adaptive young-old sizing policies at major collections")    \
2115                                                                             \
2116   product(bool, UseAdaptiveSizePolicyWithSystemGC, false,                   \
2117           "Include statistics from System.gc() for adaptive size policy")   \
2118                                                                             \
2119   product(bool, UseAdaptiveGCBoundary, false,                               \
2120           "Allow young-old boundary to move")                               \
2121                                                                             \
2122   develop(bool, TraceAdaptiveGCBoundary, false,                             \
2123           "Trace young-old boundary moves")                                 \
2124                                                                             \
2125   develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1,             \
2126           "Resize the virtual spaces of the young or old generations")      \
2127                                                                             \
2128   product(uintx, AdaptiveSizeThroughPutPolicy, 0,                           \
2129           "Policy for changing generation size for throughput goals")       \
2130                                                                             \
2131   product(uintx, AdaptiveSizePausePolicy, 0,                                \
2132           "Policy for changing generation size for pause goals")            \
2133                                                                             \
2134   develop(bool, PSAdjustTenuredGenForMinorPause, false,                     \
2135           "Adjust tenured generation to achieve a minor pause goal")        \
2136                                                                             \
2137   develop(bool, PSAdjustYoungGenForMajorPause, false,                       \
2138           "Adjust young generation to achieve a major pause goal")          \
2139                                                                             \
2140   product(uintx, AdaptiveSizePolicyInitializingSteps, 20,                   \
2141           "Number of steps where heuristics is used before data is used")   \
2142                                                                             \
2143   develop(uintx, AdaptiveSizePolicyReadyThreshold, 5,                       \
2144           "Number of collections before the adaptive sizing is started")    \
2145                                                                             \
2146   product(uintx, AdaptiveSizePolicyOutputInterval, 0,                       \
2147           "Collection interval for printing information; zero means never") \
2148                                                                             \
2149   product(bool, UseAdaptiveSizePolicyFootprintGoal, true,                   \
2150           "Use adaptive minimum footprint as a goal")                       \
2151                                                                             \
2152   product(uintx, AdaptiveSizePolicyWeight, 10,                              \
2153           "Weight given to exponential resizing, between 0 and 100")        \
2154                                                                             \
2155   product(uintx, AdaptiveTimeWeight,       25,                              \
2156           "Weight given to time in adaptive policy, between 0 and 100")     \
2157                                                                             \
2158   product(uintx, PausePadding, 1,                                           \
2159           "How much buffer to keep for pause time")                         \
2160                                                                             \
2161   product(uintx, PromotedPadding, 3,                                        \
2162           "How much buffer to keep for promotion failure")                  \
2163                                                                             \
2164   product(uintx, SurvivorPadding, 3,                                        \
2165           "How much buffer to keep for survivor overflow")                  \
2166                                                                             \
2167   product(uintx, ThresholdTolerance, 10,                                    \
2168           "Allowed collection cost difference between generations")         \
2169                                                                             \
2170   product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50,                \
2171           "If collection costs are within margin, reduce both by full "     \
2172           "delta")                                                          \
2173                                                                             \
2174   product(uintx, YoungGenerationSizeIncrement, 20,                          \
2175           "Adaptive size percentage change in young generation")            \
2176                                                                             \
2177   product(uintx, YoungGenerationSizeSupplement, 80,                         \
2178           "Supplement to YoungedGenerationSizeIncrement used at startup")   \
2179                                                                             \
2180   product(uintx, YoungGenerationSizeSupplementDecay, 8,                     \
2181           "Decay factor to YoungedGenerationSizeSupplement")                \
2182                                                                             \
2183   product(uintx, TenuredGenerationSizeIncrement, 20,                        \
2184           "Adaptive size percentage change in tenured generation")          \
2185                                                                             \
2186   product(uintx, TenuredGenerationSizeSupplement, 80,                       \
2187           "Supplement to TenuredGenerationSizeIncrement used at startup")   \
2188                                                                             \
2189   product(uintx, TenuredGenerationSizeSupplementDecay, 2,                   \
2190           "Decay factor to TenuredGenerationSizeIncrement")                 \
2191                                                                             \
2192   product(uintx, MaxGCPauseMillis, max_uintx,                               \
2193           "Adaptive size policy maximum GC pause time goal in millisecond, "\
2194           "or (G1 Only) the maximum GC time per MMU time slice")            \
2195                                                                             \
2196   product(uintx, GCPauseIntervalMillis, 0,                                  \
2197           "Time slice for MMU specification")                               \
2198                                                                             \
2199   product(uintx, MaxGCMinorPauseMillis, max_uintx,                          \
2200           "Adaptive size policy maximum GC minor pause time goal "          \
2201           "in millisecond")                                                 \
2202                                                                             \
2203   product(uintx, GCTimeRatio, 99,                                           \
2204           "Adaptive size policy application time to GC time ratio")         \
2205                                                                             \
2206   product(uintx, AdaptiveSizeDecrementScaleFactor, 4,                       \
2207           "Adaptive size scale down factor for shrinking")                  \
2208                                                                             \
2209   product(bool, UseAdaptiveSizeDecayMajorGCCost, true,                      \
2210           "Adaptive size decays the major cost for long major intervals")   \
2211                                                                             \
2212   product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10,                     \
2213           "Time scale over which major costs decay")                        \
2214                                                                             \
2215   product(uintx, MinSurvivorRatio, 3,                                       \
2216           "Minimum ratio of young generation/survivor space size")          \
2217                                                                             \
2218   product(uintx, InitialSurvivorRatio, 8,                                   \
2219           "Initial ratio of young generation/survivor space size")          \
2220                                                                             \
2221   product(uintx, BaseFootPrintEstimate, 256*M,                              \
2222           "Estimate of footprint other than Java Heap")                     \
2223                                                                             \
2224   product(bool, UseGCOverheadLimit, true,                                   \
2225           "Use policy to limit of proportion of time spent in GC "          \
2226           "before an OutOfMemory error is thrown")                          \
2227                                                                             \
2228   product(uintx, GCTimeLimit, 98,                                           \
2229           "Limit of the proportion of time spent in GC before "             \
2230           "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)")      \
2231                                                                             \
2232   product(uintx, GCHeapFreeLimit, 2,                                        \
2233           "Minimum percentage of free space after a full GC before an "     \
2234           "OutOfMemoryError is thrown (used with GCTimeLimit)")             \
2235                                                                             \
2236   develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5,                 \
2237           "Number of consecutive collections before gc time limit fires")   \
2238                                                                             \
2239   product(bool, PrintAdaptiveSizePolicy, false,                             \
2240           "Print information about AdaptiveSizePolicy")                     \
2241                                                                             \
2242   product(intx, PrefetchCopyIntervalInBytes, -1,                            \
2243           "How far ahead to prefetch destination area (<= 0 means off)")    \
2244                                                                             \
2245   product(intx, PrefetchScanIntervalInBytes, -1,                            \
2246           "How far ahead to prefetch scan area (<= 0 means off)")           \
2247                                                                             \
2248   product(intx, PrefetchFieldsAhead, -1,                                    \
2249           "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2250                                                                             \
2251   diagnostic(bool, VerifySilently, false,                                   \
2252           "Do not print the verification progress")                         \
2253                                                                             \
2254   diagnostic(bool, VerifyDuringStartup, false,                              \
2255           "Verify memory system before executing any Java code "            \
2256           "during VM initialization")                                       \
2257                                                                             \
2258   diagnostic(bool, VerifyBeforeExit, trueInDebug,                           \
2259           "Verify system before exiting")                                   \
2260                                                                             \
2261   diagnostic(bool, VerifyBeforeGC, false,                                   \
2262           "Verify memory system before GC")                                 \
2263                                                                             \
2264   diagnostic(bool, VerifyAfterGC, false,                                    \
2265           "Verify memory system after GC")                                  \
2266                                                                             \
2267   diagnostic(bool, VerifyDuringGC, false,                                   \
2268           "Verify memory system during GC (between phases)")                \
2269                                                                             \
2270   diagnostic(bool, GCParallelVerificationEnabled, true,                     \
2271           "Enable parallel memory system verification")                     \
2272                                                                             \
2273   diagnostic(bool, DeferInitialCardMark, false,                             \
2274           "When +ReduceInitialCardMarks, explicitly defer any that "        \
2275           "may arise from new_pre_store_barrier")                           \
2276                                                                             \
2277   diagnostic(bool, VerifyRememberedSets, false,                             \
2278           "Verify GC remembered sets")                                      \
2279                                                                             \
2280   diagnostic(bool, VerifyObjectStartArray, true,                            \
2281           "Verify GC object start array if verify before/after")            \
2282                                                                             \
2283   product(bool, DisableExplicitGC, false,                                   \
2284           "Ignore calls to System.gc()")                                    \
2285                                                                             \
2286   notproduct(bool, CheckMemoryInitialization, false,                        \
2287           "Check memory initialization")                                    \
2288                                                                             \
2289   diagnostic(bool, BindCMSThreadToCPU, false,                               \
2290           "Bind CMS Thread to CPU if possible")                             \
2291                                                                             \
2292   diagnostic(uintx, CPUForCMSThread, 0,                                     \
2293           "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2294                                                                             \
2295   product(bool, BindGCTaskThreadsToCPUs, false,                             \
2296           "Bind GCTaskThreads to CPUs if possible")                         \
2297                                                                             \
2298   product(bool, UseGCTaskAffinity, false,                                   \
2299           "Use worker affinity when asking for GCTasks")                    \
2300                                                                             \
2301   product(uintx, ProcessDistributionStride, 4,                              \
2302           "Stride through processors when distributing processes")          \
2303                                                                             \
2304   product(uintx, CMSCoordinatorYieldSleepCount, 10,                         \
2305           "Number of times the coordinator GC thread will sleep while "     \
2306           "yielding before giving up and resuming GC")                      \
2307                                                                             \
2308   product(uintx, CMSYieldSleepCount, 0,                                     \
2309           "Number of times a GC thread (minus the coordinator) "            \
2310           "will sleep while yielding before giving up and resuming GC")     \
2311                                                                             \
2312   /* gc tracing */                                                          \
2313   manageable(bool, PrintGC, false,                                          \
2314           "Print message at garbage collection")                            \
2315                                                                             \
2316   manageable(bool, PrintGCDetails, false,                                   \
2317           "Print more details at garbage collection")                       \
2318                                                                             \
2319   manageable(bool, PrintGCDateStamps, false,                                \
2320           "Print date stamps at garbage collection")                        \
2321                                                                             \
2322   manageable(bool, PrintGCTimeStamps, false,                                \
2323           "Print timestamps at garbage collection")                         \
2324                                                                             \
2325   manageable(bool, PrintGCID, true,                                         \
2326           "Print an identifier for each garbage collection")                \
2327                                                                             \
2328   product(bool, PrintGCTaskTimeStamps, false,                               \
2329           "Print timestamps for individual gc worker thread tasks")         \
2330                                                                             \
2331   develop(intx, ConcGCYieldTimeout, 0,                                      \
2332           "If non-zero, assert that GC threads yield within this "          \
2333           "number of milliseconds")                                         \
2334                                                                             \
2335   notproduct(bool, TraceMarkSweep, false,                                   \
2336           "Trace mark sweep")                                               \
2337                                                                             \
2338   product(bool, PrintReferenceGC, false,                                    \
2339           "Print times spent handling reference objects during GC "         \
2340           "(enabled only when PrintGCDetails)")                             \
2341                                                                             \
2342   develop(bool, TraceReferenceGC, false,                                    \
2343           "Trace handling of soft/weak/final/phantom references")           \
2344                                                                             \
2345   develop(bool, TraceFinalizerRegistration, false,                          \
2346           "Trace registration of final references")                         \
2347                                                                             \
2348   notproduct(bool, TraceScavenge, false,                                    \
2349           "Trace scavenge")                                                 \
2350                                                                             \
2351   product(bool, IgnoreEmptyClassPaths, false,                               \
2352           "Ignore empty path elements in -classpath")                       \
2353                                                                             \
2354   product(bool, TraceClassPaths, false,                                     \
2355           "Trace processing of class paths")                                \
2356                                                                             \
2357   product_rw(bool, TraceClassLoading, false,                                \
2358           "Trace all classes loaded")                                       \
2359                                                                             \
2360   product(bool, TraceClassLoadingPreorder, false,                           \
2361           "Trace all classes loaded in order referenced (not loaded)")      \
2362                                                                             \
2363   product_rw(bool, TraceClassUnloading, false,                              \
2364           "Trace unloading of classes")                                     \
2365                                                                             \
2366   product_rw(bool, TraceLoaderConstraints, false,                           \
2367           "Trace loader constraints")                                       \
2368                                                                             \
2369   develop(bool, TraceClassLoaderData, false,                                \
2370           "Trace class loader loader_data lifetime")                        \
2371                                                                             \
2372   product(uintx, InitialBootClassLoaderMetaspaceSize,                       \
2373           NOT_LP64(2200*K) LP64_ONLY(4*M),                                  \
2374           "Initial size of the boot class loader data metaspace")           \
2375                                                                             \
2376   product(bool, TraceYoungGenTime, false,                                   \
2377           "Trace accumulated time for young collection")                    \
2378                                                                             \
2379   product(bool, TraceOldGenTime, false,                                     \
2380           "Trace accumulated time for old collection")                      \
2381                                                                             \
2382   product(bool, PrintTenuringDistribution, false,                           \
2383           "Print tenuring age information")                                 \
2384                                                                             \
2385   product_rw(bool, PrintHeapAtGC, false,                                    \
2386           "Print heap layout before and after each GC")                     \
2387                                                                             \
2388   product_rw(bool, PrintHeapAtGCExtended, false,                            \
2389           "Print extended information about the layout of the heap "        \
2390           "when -XX:+PrintHeapAtGC is set")                                 \
2391                                                                             \
2392   product(bool, PrintHeapAtSIGBREAK, true,                                  \
2393           "Print heap layout in response to SIGBREAK")                      \
2394                                                                             \
2395   manageable(bool, PrintClassHistogramBeforeFullGC, false,                  \
2396           "Print a class histogram before any major stop-world GC")         \
2397                                                                             \
2398   manageable(bool, PrintClassHistogramAfterFullGC, false,                   \
2399           "Print a class histogram after any major stop-world GC")          \
2400                                                                             \
2401   manageable(bool, PrintClassHistogram, false,                              \
2402           "Print a histogram of class instances")                           \
2403                                                                             \
2404   develop(bool, TraceWorkGang, false,                                       \
2405           "Trace activities of work gangs")                                 \
2406                                                                             \
2407   product(bool, TraceParallelOldGCTasks, false,                             \
2408           "Trace multithreaded GC activity")                                \
2409                                                                             \
2410   develop(bool, TraceBlockOffsetTable, false,                               \
2411           "Print BlockOffsetTable maps")                                    \
2412                                                                             \
2413   develop(bool, TraceCardTableModRefBS, false,                              \
2414           "Print CardTableModRefBS maps")                                   \
2415                                                                             \
2416   develop(bool, TraceGCTaskManager, false,                                  \
2417           "Trace actions of the GC task manager")                           \
2418                                                                             \
2419   develop(bool, TraceGCTaskQueue, false,                                    \
2420           "Trace actions of the GC task queues")                            \
2421                                                                             \
2422   diagnostic(bool, TraceGCTaskThread, false,                                \
2423           "Trace actions of the GC task threads")                           \
2424                                                                             \
2425   product(bool, PrintParallelOldGCPhaseTimes, false,                        \
2426           "Print the time taken by each phase in ParallelOldGC "            \
2427           "(PrintGCDetails must also be enabled)")                          \
2428                                                                             \
2429   develop(bool, TraceParallelOldGCMarkingPhase, false,                      \
2430           "Trace marking phase in ParallelOldGC")                           \
2431                                                                             \
2432   develop(bool, TraceParallelOldGCSummaryPhase, false,                      \
2433           "Trace summary phase in ParallelOldGC")                           \
2434                                                                             \
2435   develop(bool, TraceParallelOldGCCompactionPhase, false,                   \
2436           "Trace compaction phase in ParallelOldGC")                        \
2437                                                                             \
2438   develop(bool, TraceParallelOldGCDensePrefix, false,                       \
2439           "Trace dense prefix computation for ParallelOldGC")               \
2440                                                                             \
2441   develop(bool, IgnoreLibthreadGPFault, false,                              \
2442           "Suppress workaround for libthread GP fault")                     \
2443                                                                             \
2444   product(bool, PrintJNIGCStalls, false,                                    \
2445           "Print diagnostic message when GC is stalled "                    \
2446           "by JNI critical section")                                        \
2447                                                                             \
2448   experimental(double, ObjectCountCutOffPercent, 0.5,                       \
2449           "The percentage of the used heap that the instances of a class "  \
2450           "must occupy for the class to generate a trace event")            \
2451                                                                             \
2452   /* GC log rotation setting */                                             \
2453                                                                             \
2454   product(bool, UseGCLogFileRotation, false,                                \
2455           "Rotate gclog files (for long running applications). It requires "\
2456           "-Xloggc:<filename>")                                             \
2457                                                                             \
2458   product(uintx, NumberOfGCLogFiles, 0,                                     \
2459           "Number of gclog files in rotation "                              \
2460           "(default: 0, no rotation)")                                      \
2461                                                                             \
2462   product(uintx, GCLogFileSize, 8*K,                                        \
2463           "GC log file size, requires UseGCLogFileRotation. "               \
2464           "Set to 0 to only trigger rotation via jcmd")                     \
2465                                                                             \
2466   /* JVMTI heap profiling */                                                \
2467                                                                             \
2468   diagnostic(bool, TraceJVMTIObjectTagging, false,                          \
2469           "Trace JVMTI object tagging calls")                               \
2470                                                                             \
2471   diagnostic(bool, VerifyBeforeIteration, false,                            \
2472           "Verify memory system before JVMTI iteration")                    \
2473                                                                             \
2474   /* compiler interface */                                                  \
2475                                                                             \
2476   develop(bool, CIPrintCompilerName, false,                                 \
2477           "when CIPrint is active, print the name of the active compiler")  \
2478                                                                             \
2479   diagnostic(bool, CIPrintCompileQueue, false,                              \
2480           "display the contents of the compile queue whenever a "           \
2481           "compilation is enqueued")                                        \
2482                                                                             \
2483   develop(bool, CIPrintRequests, false,                                     \
2484           "display every request for compilation")                          \
2485                                                                             \
2486   product(bool, CITime, false,                                              \
2487           "collect timing information for compilation")                     \
2488                                                                             \
2489   develop(bool, CITimeEach, false,                                          \
2490           "display timing information after each successful compilation")   \
2491                                                                             \
2492   develop(bool, CICountOSR, false,                                          \
2493           "use a separate counter when assigning ids to osr compilations")  \
2494                                                                             \
2495   develop(bool, CICompileNatives, true,                                     \
2496           "compile native methods if supported by the compiler")            \
2497                                                                             \
2498   develop_pd(bool, CICompileOSR,                                            \
2499           "compile on stack replacement methods if supported by the "       \
2500           "compiler")                                                       \
2501                                                                             \
2502   develop(bool, CIPrintMethodCodes, false,                                  \
2503           "print method bytecodes of the compiled code")                    \
2504                                                                             \
2505   develop(bool, CIPrintTypeFlow, false,                                     \
2506           "print the results of ciTypeFlow analysis")                       \
2507                                                                             \
2508   develop(bool, CITraceTypeFlow, false,                                     \
2509           "detailed per-bytecode tracing of ciTypeFlow analysis")           \
2510                                                                             \
2511   develop(intx, OSROnlyBCI, -1,                                             \
2512           "OSR only at this bci.  Negative values mean exclude that bci")   \
2513                                                                             \
2514   /* compiler */                                                            \
2515                                                                             \
2516   product(intx, CICompilerCount, CI_COMPILER_COUNT,                         \
2517           "Number of compiler threads to run")                              \
2518                                                                             \
2519   product(intx, CompilationPolicyChoice, 0,                                 \
2520           "which compilation policy (0/1)")                                 \
2521                                                                             \
2522   develop(bool, UseStackBanging, true,                                      \
2523           "use stack banging for stack overflow checks (required for "      \
2524           "proper StackOverflow handling; disable only to measure cost "    \
2525           "of stackbanging)")                                               \
2526                                                                             \
2527   develop(bool, UseStrictFP, true,                                          \
2528           "use strict fp if modifier strictfp is set")                      \
2529                                                                             \
2530   develop(bool, GenerateSynchronizationCode, true,                          \
2531           "generate locking/unlocking code for synchronized methods and "   \
2532           "monitors")                                                       \
2533                                                                             \
2534   develop(bool, GenerateCompilerNullChecks, true,                           \
2535           "Generate explicit null checks for loads/stores/calls")           \
2536                                                                             \
2537   develop(bool, GenerateRangeChecks, true,                                  \
2538           "Generate range checks for array accesses")                       \
2539                                                                             \
2540   develop_pd(bool, ImplicitNullChecks,                                      \
2541           "Generate code for implicit null checks")                         \
2542                                                                             \
2543   product_pd(bool, TrapBasedNullChecks,                                     \
2544           "Generate code for null checks that uses a cmp and trap "         \
2545           "instruction raising SIGTRAP.  This is only used if an access to" \
2546           "null (+offset) will not raise a SIGSEGV, i.e.,"                  \
2547           "ImplicitNullChecks don't work (PPC64).")                         \
2548                                                                             \
2549   product(bool, PrintSafepointStatistics, false,                            \
2550           "Print statistics about safepoint synchronization")               \
2551                                                                             \
2552   product(intx, PrintSafepointStatisticsCount, 300,                         \
2553           "Total number of safepoint statistics collected "                 \
2554           "before printing them out")                                       \
2555                                                                             \
2556   product(intx, PrintSafepointStatisticsTimeout,  -1,                       \
2557           "Print safepoint statistics only when safepoint takes "           \
2558           "more than PrintSafepointSatisticsTimeout in millis")             \
2559                                                                             \
2560   product(bool, TraceSafepointCleanupTime, false,                           \
2561           "Print the break down of clean up tasks performed during "        \
2562           "safepoint")                                                      \
2563                                                                             \
2564   product(bool, Inline, true,                                               \
2565           "Enable inlining")                                                \
2566                                                                             \
2567   product(bool, ClipInlining, true,                                         \
2568           "Clip inlining if aggregate method exceeds DesiredMethodLimit")   \
2569                                                                             \
2570   develop(bool, UseCHA, true,                                               \
2571           "Enable CHA")                                                     \
2572                                                                             \
2573   product(bool, UseTypeProfile, true,                                       \
2574           "Check interpreter profile for historically monomorphic calls")   \
2575                                                                             \
2576   notproduct(bool, TimeCompiler, false,                                     \
2577           "Time the compiler")                                              \
2578                                                                             \
2579   diagnostic(bool, PrintInlining, false,                                    \
2580           "Print inlining optimizations")                                   \
2581                                                                             \
2582   product(bool, UsePopCountInstruction, false,                              \
2583           "Use population count instruction")                               \
2584                                                                             \
2585   develop(bool, EagerInitialization, false,                                 \
2586           "Eagerly initialize classes if possible")                         \
2587                                                                             \
2588   develop(bool, TraceMethodReplacement, false,                              \
2589           "Print when methods are replaced do to recompilation")            \
2590                                                                             \
2591   develop(bool, PrintMethodFlushing, false,                                 \
2592           "Print the nmethods being flushed")                               \
2593                                                                             \
2594   diagnostic(bool, PrintMethodFlushingStatistics, false,                    \
2595           "print statistics about method flushing")                         \
2596                                                                             \
2597   diagnostic(intx, HotMethodDetectionLimit, 100000,                         \
2598           "Number of compiled code invocations after which "                \
2599           "the method is considered as hot by the flusher")                 \
2600                                                                             \
2601   diagnostic(intx, MinPassesBeforeFlush, 10,                                \
2602           "Minimum number of sweeper passes before an nmethod "             \
2603           "can be flushed")                                                 \
2604                                                                             \
2605   product(bool, UseCodeAging, true,                                         \
2606           "Insert counter to detect warm methods")                          \
2607                                                                             \
2608   diagnostic(bool, StressCodeAging, false,                                  \
2609           "Start with counters compiled in")                                \
2610                                                                             \
2611   develop(bool, UseRelocIndex, false,                                       \
2612           "Use an index to speed random access to relocations")             \
2613                                                                             \
2614   develop(bool, StressCodeBuffers, false,                                   \
2615           "Exercise code buffer expansion and other rare state changes")    \
2616                                                                             \
2617   diagnostic(bool, DebugNonSafepoints, trueInDebug,                         \
2618           "Generate extra debugging information for non-safepoints in "     \
2619           "nmethods")                                                       \
2620                                                                             \
2621   product(bool, PrintVMOptions, false,                                      \
2622           "Print flags that appeared on the command line")                  \
2623                                                                             \
2624   product(bool, IgnoreUnrecognizedVMOptions, false,                         \
2625           "Ignore unrecognized VM options")                                 \
2626                                                                             \
2627   product(bool, PrintCommandLineFlags, false,                               \
2628           "Print flags specified on command line or set by ergonomics")     \
2629                                                                             \
2630   product(bool, PrintFlagsInitial, false,                                   \
2631           "Print all VM flags before argument processing and exit VM")      \
2632                                                                             \
2633   product(bool, PrintFlagsFinal, false,                                     \
2634           "Print all VM flags after argument and ergonomic processing")     \
2635                                                                             \
2636   notproduct(bool, PrintFlagsWithComments, false,                           \
2637           "Print all VM flags with default values and descriptions and "    \
2638           "exit")                                                           \
2639                                                                             \
2640   diagnostic(bool, SerializeVMOutput, true,                                 \
2641           "Use a mutex to serialize output to tty and LogFile")             \
2642                                                                             \
2643   diagnostic(bool, DisplayVMOutput, true,                                   \
2644           "Display all VM output on the tty, independently of LogVMOutput") \
2645                                                                             \
2646   diagnostic(bool, LogVMOutput, false,                                      \
2647           "Save VM output to LogFile")                                      \
2648                                                                             \
2649   diagnostic(ccstr, LogFile, NULL,                                          \
2650           "If LogVMOutput or LogCompilation is on, save VM output to "      \
2651           "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2652                                                                             \
2653   product(ccstr, ErrorFile, NULL,                                           \
2654           "If an error occurs, save the error data to this file "           \
2655           "[default: ./hs_err_pid%p.log] (%p replaced with pid)")           \
2656                                                                             \
2657   product(bool, DisplayVMOutputToStderr, false,                             \
2658           "If DisplayVMOutput is true, display all VM output to stderr")    \
2659                                                                             \
2660   product(bool, DisplayVMOutputToStdout, false,                             \
2661           "If DisplayVMOutput is true, display all VM output to stdout")    \
2662                                                                             \
2663   product(bool, UseHeavyMonitors, false,                                    \
2664           "use heavyweight instead of lightweight Java monitors")           \
2665                                                                             \
2666   product(bool, PrintStringTableStatistics, false,                          \
2667           "print statistics about the StringTable and SymbolTable")         \
2668                                                                             \
2669   diagnostic(bool, VerifyStringTableAtExit, false,                          \
2670           "verify StringTable contents at exit")                            \
2671                                                                             \
2672   notproduct(bool, PrintSymbolTableSizeHistogram, false,                    \
2673           "print histogram of the symbol table")                            \
2674                                                                             \
2675   notproduct(bool, ExitVMOnVerifyError, false,                              \
2676           "standard exit from VM if bytecode verify error "                 \
2677           "(only in debug mode)")                                           \
2678                                                                             \
2679   notproduct(ccstr, AbortVMOnException, NULL,                               \
2680           "Call fatal if this exception is thrown.  Example: "              \
2681           "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2682                                                                             \
2683   notproduct(ccstr, AbortVMOnExceptionMessage, NULL,                        \
2684           "Call fatal if the exception pointed by AbortVMOnException "      \
2685           "has this message")                                               \
2686                                                                             \
2687   develop(bool, DebugVtables, false,                                        \
2688           "add debugging code to vtable dispatch")                          \
2689                                                                             \
2690   develop(bool, PrintVtables, false,                                        \
2691           "print vtables when printing klass")                              \
2692                                                                             \
2693   notproduct(bool, PrintVtableStats, false,                                 \
2694           "print vtables stats at end of run")                              \
2695                                                                             \
2696   develop(bool, TraceCreateZombies, false,                                  \
2697           "trace creation of zombie nmethods")                              \
2698                                                                             \
2699   notproduct(bool, IgnoreLockingAssertions, false,                          \
2700           "disable locking assertions (for speed)")                         \
2701                                                                             \
2702   product(bool, RangeCheckElimination, true,                                \
2703           "Eliminate range checks")                                         \
2704                                                                             \
2705   develop_pd(bool, UncommonNullCast,                                        \
2706           "track occurrences of null in casts; adjust compiler tactics")    \
2707                                                                             \
2708   develop(bool, TypeProfileCasts,  true,                                    \
2709           "treat casts like calls for purposes of type profiling")          \
2710                                                                             \
2711   develop(bool, DelayCompilationDuringStartup, true,                        \
2712           "Delay invoking the compiler until main application class is "    \
2713           "loaded")                                                         \
2714                                                                             \
2715   develop(bool, CompileTheWorld, false,                                     \
2716           "Compile all methods in all classes in bootstrap class path "     \
2717           "(stress test)")                                                  \
2718                                                                             \
2719   develop(bool, CompileTheWorldPreloadClasses, true,                        \
2720           "Preload all classes used by a class before start loading")       \
2721                                                                             \
2722   notproduct(intx, CompileTheWorldSafepointInterval, 100,                   \
2723           "Force a safepoint every n compiles so sweeper can keep up")      \
2724                                                                             \
2725   develop(bool, FillDelaySlots, true,                                       \
2726           "Fill delay slots (on SPARC only)")                               \
2727                                                                             \
2728   develop(bool, TimeLivenessAnalysis, false,                                \
2729           "Time computation of bytecode liveness analysis")                 \
2730                                                                             \
2731   develop(bool, TraceLivenessGen, false,                                    \
2732           "Trace the generation of liveness analysis information")          \
2733                                                                             \
2734   notproduct(bool, TraceLivenessQuery, false,                               \
2735           "Trace queries of liveness analysis information")                 \
2736                                                                             \
2737   notproduct(bool, CollectIndexSetStatistics, false,                        \
2738           "Collect information about IndexSets")                            \
2739                                                                             \
2740   develop(bool, UseLoopSafepoints, true,                                    \
2741           "Generate Safepoint nodes in every loop")                         \
2742                                                                             \
2743   develop(intx, FastAllocateSizeLimit, 128*K,                               \
2744           /* Note:  This value is zero mod 1<<13 for a cheap sparc set. */  \
2745           "Inline allocations larger than this in doublewords must go slow")\
2746                                                                             \
2747   product(bool, AggressiveOpts, false,                                      \
2748           "Enable aggressive optimizations - see arguments.cpp")            \
2749                                                                             \
2750   product_pd(uintx, TypeProfileLevel,                                       \
2751           "=XYZ, with Z: Type profiling of arguments at call; "             \
2752                      "Y: Type profiling of return value at call; "          \
2753                      "X: Type profiling of parameters to methods; "         \
2754           "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods")             \
2755                                                                             \
2756   product(intx, TypeProfileArgsLimit,     2,                                \
2757           "max number of call arguments to consider for type profiling")    \
2758                                                                             \
2759   product(intx, TypeProfileParmsLimit,    2,                                \
2760           "max number of incoming parameters to consider for type profiling"\
2761           ", -1 for all")                                                   \
2762                                                                             \
2763   /* statistics */                                                          \
2764   develop(bool, CountCompiledCalls, false,                                  \
2765           "Count method invocations")                                       \
2766                                                                             \
2767   notproduct(bool, CountRuntimeCalls, false,                                \
2768           "Count VM runtime calls")                                         \
2769                                                                             \
2770   develop(bool, CountJNICalls, false,                                       \
2771           "Count jni method invocations")                                   \
2772                                                                             \
2773   notproduct(bool, CountJVMCalls, false,                                    \
2774           "Count jvm method invocations")                                   \
2775                                                                             \
2776   notproduct(bool, CountRemovableExceptions, false,                         \
2777           "Count exceptions that could be replaced by branches due to "     \
2778           "inlining")                                                       \
2779                                                                             \
2780   notproduct(bool, ICMissHistogram, false,                                  \
2781           "Produce histogram of IC misses")                                 \
2782                                                                             \
2783   notproduct(bool, PrintClassStatistics, false,                             \
2784           "Print class statistics at end of run")                           \
2785                                                                             \
2786   notproduct(bool, PrintMethodStatistics, false,                            \
2787           "Print method statistics at end of run")                          \
2788                                                                             \
2789   /* interpreter */                                                         \
2790   develop(bool, ClearInterpreterLocals, false,                              \
2791           "Always clear local variables of interpreter activations upon "   \
2792           "entry")                                                          \
2793                                                                             \
2794   product_pd(bool, RewriteBytecodes,                                        \
2795           "Allow rewriting of bytecodes (bytecodes are not immutable)")     \
2796                                                                             \
2797   product_pd(bool, RewriteFrequentPairs,                                    \
2798           "Rewrite frequently used bytecode pairs into a single bytecode")  \
2799                                                                             \
2800   diagnostic(bool, PrintInterpreter, false,                                 \
2801           "Print the generated interpreter code")                           \
2802                                                                             \
2803   product(bool, UseInterpreter, true,                                       \
2804           "Use interpreter for non-compiled methods")                       \
2805                                                                             \
2806   develop(bool, UseFastSignatureHandlers, true,                             \
2807           "Use fast signature handlers for native calls")                   \
2808                                                                             \
2809   product(bool, UseLoopCounter, true,                                       \
2810           "Increment invocation counter on backward branch")                \
2811                                                                             \
2812   product_pd(bool, UseOnStackReplacement,                                   \
2813           "Use on stack replacement, calls runtime if invoc. counter "      \
2814           "overflows in loop")                                              \
2815                                                                             \
2816   notproduct(bool, TraceOnStackReplacement, false,                          \
2817           "Trace on stack replacement")                                     \
2818                                                                             \
2819   product_pd(bool, PreferInterpreterNativeStubs,                            \
2820           "Use always interpreter stubs for native methods invoked via "    \
2821           "interpreter")                                                    \
2822                                                                             \
2823   develop(bool, CountBytecodes, false,                                      \
2824           "Count number of bytecodes executed")                             \
2825                                                                             \
2826   develop(bool, PrintBytecodeHistogram, false,                              \
2827           "Print histogram of the executed bytecodes")                      \
2828                                                                             \
2829   develop(bool, PrintBytecodePairHistogram, false,                          \
2830           "Print histogram of the executed bytecode pairs")                 \
2831                                                                             \
2832   diagnostic(bool, PrintSignatureHandlers, false,                           \
2833           "Print code generated for native method signature handlers")      \
2834                                                                             \
2835   develop(bool, VerifyOops, false,                                          \
2836           "Do plausibility checks for oops")                                \
2837                                                                             \
2838   develop(bool, CheckUnhandledOops, false,                                  \
2839           "Check for unhandled oops in VM code")                            \
2840                                                                             \
2841   develop(bool, VerifyJNIFields, trueInDebug,                               \
2842           "Verify jfieldIDs for instance fields")                           \
2843                                                                             \
2844   notproduct(bool, VerifyJNIEnvThread, false,                               \
2845           "Verify JNIEnv.thread == Thread::current() when entering VM "     \
2846           "from JNI")                                                       \
2847                                                                             \
2848   develop(bool, VerifyFPU, false,                                           \
2849           "Verify FPU state (check for NaN's, etc.)")                       \
2850                                                                             \
2851   develop(bool, VerifyThread, false,                                        \
2852           "Watch the thread register for corruption (SPARC only)")          \
2853                                                                             \
2854   develop(bool, VerifyActivationFrameSize, false,                           \
2855           "Verify that activation frame didn't become smaller than its "    \
2856           "minimal size")                                                   \
2857                                                                             \
2858   develop(bool, TraceFrequencyInlining, false,                              \
2859           "Trace frequency based inlining")                                 \
2860                                                                             \
2861   develop_pd(bool, InlineIntrinsics,                                        \
2862           "Inline intrinsics that can be statically resolved")              \
2863                                                                             \
2864   product_pd(bool, ProfileInterpreter,                                      \
2865           "Profile at the bytecode level during interpretation")            \
2866                                                                             \
2867   develop(bool, TraceProfileInterpreter, false,                             \
2868           "Trace profiling at the bytecode level during interpretation. "   \
2869           "This outputs the profiling information collected to improve "    \
2870           "jit compilation.")                                               \
2871                                                                             \
2872   develop_pd(bool, ProfileTraps,                                            \
2873           "Profile deoptimization traps at the bytecode level")             \
2874                                                                             \
2875   product(intx, ProfileMaturityPercentage, 20,                              \
2876           "number of method invocations/branches (expressed as % of "       \
2877           "CompileThreshold) before using the method's profile")            \
2878                                                                             \
2879   diagnostic(bool, PrintMethodData, false,                                  \
2880           "Print the results of +ProfileInterpreter at end of run")         \
2881                                                                             \
2882   develop(bool, VerifyDataPointer, trueInDebug,                             \
2883           "Verify the method data pointer during interpreter profiling")    \
2884                                                                             \
2885   develop(bool, VerifyCompiledCode, false,                                  \
2886           "Include miscellaneous runtime verifications in nmethod code; "   \
2887           "default off because it disturbs nmethod size heuristics")        \
2888                                                                             \
2889   notproduct(bool, CrashGCForDumpingJavaThread, false,                      \
2890           "Manually make GC thread crash then dump java stack trace;  "     \
2891           "Test only")                                                      \
2892                                                                             \
2893   /* compilation */                                                         \
2894   product(bool, UseCompiler, true,                                          \
2895           "Use Just-In-Time compilation")                                   \
2896                                                                             \
2897   develop(bool, TraceCompilationPolicy, false,                              \
2898           "Trace compilation policy")                                       \
2899                                                                             \
2900   develop(bool, TimeCompilationPolicy, false,                               \
2901           "Time the compilation policy")                                    \
2902                                                                             \
2903   product(bool, UseCounterDecay, true,                                      \
2904           "Adjust recompilation counters")                                  \
2905                                                                             \
2906   develop(intx, CounterHalfLifeTime,    30,                                 \
2907           "Half-life time of invocation counters (in seconds)")             \
2908                                                                             \
2909   develop(intx, CounterDecayMinIntervalLength,   500,                       \
2910           "The minimum interval (in milliseconds) between invocation of "   \
2911           "CounterDecay")                                                   \
2912                                                                             \
2913   product(bool, AlwaysCompileLoopMethods, false,                            \
2914           "When using recompilation, never interpret methods "              \
2915           "containing loops")                                               \
2916                                                                             \
2917   product(bool, DontCompileHugeMethods, true,                               \
2918           "Do not compile methods > HugeMethodLimit")                       \
2919                                                                             \
2920   /* Bytecode escape analysis estimation. */                                \
2921   product(bool, EstimateArgEscape, true,                                    \
2922           "Analyze bytecodes to estimate escape state of arguments")        \
2923                                                                             \
2924   product(intx, BCEATraceLevel, 0,                                          \
2925           "How much tracing to do of bytecode escape analysis estimates")   \
2926                                                                             \
2927   product(intx, MaxBCEAEstimateLevel, 5,                                    \
2928           "Maximum number of nested calls that are analyzed by BC EA")      \
2929                                                                             \
2930   product(intx, MaxBCEAEstimateSize, 150,                                   \
2931           "Maximum bytecode size of a method to be analyzed by BC EA")      \
2932                                                                             \
2933   product(intx,  AllocatePrefetchStyle, 1,                                  \
2934           "0 = no prefetch, "                                               \
2935           "1 = prefetch instructions for each allocation, "                 \
2936           "2 = use TLAB watermark to gate allocation prefetch, "            \
2937           "3 = use BIS instruction on Sparc for allocation prefetch")       \
2938                                                                             \
2939   product(intx,  AllocatePrefetchDistance, -1,                              \
2940           "Distance to prefetch ahead of allocation pointer")               \
2941                                                                             \
2942   product(intx,  AllocatePrefetchLines, 3,                                  \
2943           "Number of lines to prefetch ahead of array allocation pointer")  \
2944                                                                             \
2945   product(intx,  AllocateInstancePrefetchLines, 1,                          \
2946           "Number of lines to prefetch ahead of instance allocation "       \
2947           "pointer")                                                        \
2948                                                                             \
2949   product(intx,  AllocatePrefetchStepSize, 16,                              \
2950           "Step size in bytes of sequential prefetch instructions")         \
2951                                                                             \
2952   product(intx,  AllocatePrefetchInstr, 0,                                  \
2953           "Prefetch instruction to prefetch ahead of allocation pointer")   \
2954                                                                             \
2955   /* deoptimization */                                                      \
2956   develop(bool, TraceDeoptimization, false,                                 \
2957           "Trace deoptimization")                                           \
2958                                                                             \
2959   develop(bool, DebugDeoptimization, false,                                 \
2960           "Tracing various information while debugging deoptimization")     \
2961                                                                             \
2962   product(intx, SelfDestructTimer, 0,                                       \
2963           "Will cause VM to terminate after a given time (in minutes) "     \
2964           "(0 means off)")                                                  \
2965                                                                             \
2966   product(intx, MaxJavaStackTraceDepth, 1024,                               \
2967           "The maximum number of lines in the stack trace for Java "        \
2968           "exceptions (0 means all)")                                       \
2969                                                                             \
2970   NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000,          \
2971           "Guarantee a safepoint (at least) every so many milliseconds "    \
2972           "(0 means none)"))                                                \
2973                                                                             \
2974   EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0,               \
2975           "Guarantee a safepoint (at least) every so many milliseconds "    \
2976           "(0 means none)"))                                                \
2977                                                                             \
2978   product(intx, SafepointTimeoutDelay, 10000,                               \
2979           "Delay in milliseconds for option SafepointTimeout")              \
2980                                                                             \
2981   product(intx, NmethodSweepFraction, 16,                                   \
2982           "Number of invocations of sweeper to cover all nmethods")         \
2983                                                                             \
2984   product(intx, NmethodSweepCheckInterval, 5,                               \
2985           "Compilers wake up every n seconds to possibly sweep nmethods")   \
2986                                                                             \
2987   product(intx, NmethodSweepActivity, 10,                                   \
2988           "Removes cold nmethods from code cache if > 0. Higher values "    \
2989           "result in more aggressive sweeping")                             \
2990                                                                             \
2991   notproduct(bool, LogSweeper, false,                                       \
2992           "Keep a ring buffer of sweeper activity")                         \
2993                                                                             \
2994   notproduct(intx, SweeperLogEntries, 1024,                                 \
2995           "Number of records in the ring buffer of sweeper activity")       \
2996                                                                             \
2997   notproduct(intx, MemProfilingInterval, 500,                               \
2998           "Time between each invocation of the MemProfiler")                \
2999                                                                             \
3000   develop(intx, MallocCatchPtr, -1,                                         \
3001           "Hit breakpoint when mallocing/freeing this pointer")             \
3002                                                                             \
3003   notproduct(intx, AssertRepeat, 1,                                         \
3004           "number of times to evaluate expression in assert "               \
3005           "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
3006                                                                             \
3007   notproduct(ccstrlist, SuppressErrorAt, "",                                \
3008           "List of assertions (file:line) to muzzle")                       \
3009                                                                             \
3010   notproduct(uintx, HandleAllocationLimit, 1024,                            \
3011           "Threshold for HandleMark allocation when +TraceHandleAllocation "\
3012           "is used")                                                        \
3013                                                                             \
3014   develop(uintx, TotalHandleAllocationLimit, 1024,                          \
3015           "Threshold for total handle allocation when "                     \
3016           "+TraceHandleAllocation is used")                                 \
3017                                                                             \
3018   develop(intx, StackPrintLimit, 100,                                       \
3019           "number of stack frames to print in VM-level stack dump")         \
3020                                                                             \
3021   notproduct(intx, MaxElementPrintSize, 256,                                \
3022           "maximum number of elements to print")                            \
3023                                                                             \
3024   notproduct(intx, MaxSubklassPrintSize, 4,                                 \
3025           "maximum number of subklasses to print when printing klass")      \
3026                                                                             \
3027   product(intx, MaxInlineLevel, 9,                                          \
3028           "maximum number of nested calls that are inlined")                \
3029                                                                             \
3030   product(intx, MaxRecursiveInlineLevel, 1,                                 \
3031           "maximum number of nested recursive calls that are inlined")      \
3032                                                                             \
3033   develop(intx, MaxForceInlineLevel, 100,                                   \
3034           "maximum number of nested calls that are forced for inlining "    \
3035           "(using CompilerOracle or marked w/ @ForceInline)")               \
3036                                                                             \
3037   product_pd(intx, InlineSmallCode,                                         \
3038           "Only inline already compiled methods if their code size is "     \
3039           "less than this")                                                 \
3040                                                                             \
3041   product(intx, MaxInlineSize, 35,                                          \
3042           "The maximum bytecode size of a method to be inlined")            \
3043                                                                             \
3044   product_pd(intx, FreqInlineSize,                                          \
3045           "The maximum bytecode size of a frequent method to be inlined")   \
3046                                                                             \
3047   product(intx, MaxTrivialSize, 6,                                          \
3048           "The maximum bytecode size of a trivial method to be inlined")    \
3049                                                                             \
3050   product(intx, MinInliningThreshold, 250,                                  \
3051           "The minimum invocation count a method needs to have to be "      \
3052           "inlined")                                                        \
3053                                                                             \
3054   develop(intx, MethodHistogramCutoff, 100,                                 \
3055           "The cutoff value for method invocation histogram (+CountCalls)") \
3056                                                                             \
3057   develop(intx, ProfilerNumberOfInterpretedMethods, 25,                     \
3058           "Number of interpreted methods to show in profile")               \
3059                                                                             \
3060   develop(intx, ProfilerNumberOfCompiledMethods, 25,                        \
3061           "Number of compiled methods to show in profile")                  \
3062                                                                             \
3063   develop(intx, ProfilerNumberOfStubMethods, 25,                            \
3064           "Number of stub methods to show in profile")                      \
3065                                                                             \
3066   develop(intx, ProfilerNumberOfRuntimeStubNodes, 25,                       \
3067           "Number of runtime stub nodes to show in profile")                \
3068                                                                             \
3069   product(intx, ProfileIntervalsTicks, 100,                                 \
3070           "Number of ticks between printing of interval profile "           \
3071           "(+ProfileIntervals)")                                            \
3072                                                                             \
3073   notproduct(intx, ScavengeALotInterval,     1,                             \
3074           "Interval between which scavenge will occur with +ScavengeALot")  \
3075                                                                             \
3076   notproduct(intx, FullGCALotInterval,     1,                               \
3077           "Interval between which full gc will occur with +FullGCALot")     \
3078                                                                             \
3079   notproduct(intx, FullGCALotStart,     0,                                  \
3080           "For which invocation to start FullGCAlot")                       \
3081                                                                             \
3082   notproduct(intx, FullGCALotDummies,  32*K,                                \
3083           "Dummy object allocated with +FullGCALot, forcing all objects "   \
3084           "to move")                                                        \
3085                                                                             \
3086   develop(intx, DontYieldALotInterval,    10,                               \
3087           "Interval between which yields will be dropped (milliseconds)")   \
3088                                                                             \
3089   develop(intx, MinSleepInterval,     1,                                    \
3090           "Minimum sleep() interval (milliseconds) when "                   \
3091           "ConvertSleepToYield is off (used for Solaris)")                  \
3092                                                                             \
3093   develop(intx, ProfilerPCTickThreshold,    15,                             \
3094           "Number of ticks in a PC buckets to be a hotspot")                \
3095                                                                             \
3096   notproduct(intx, DeoptimizeALotInterval,     5,                           \
3097           "Number of exits until DeoptimizeALot kicks in")                  \
3098                                                                             \
3099   notproduct(intx, ZombieALotInterval,     5,                               \
3100           "Number of exits until ZombieALot kicks in")                      \
3101                                                                             \
3102   diagnostic(intx, MallocVerifyInterval,     0,                             \
3103           "If non-zero, verify C heap after every N calls to "              \
3104           "malloc/realloc/free")                                            \
3105                                                                             \
3106   diagnostic(intx, MallocVerifyStart,     0,                                \
3107           "If non-zero, start verifying C heap after Nth call to "          \
3108           "malloc/realloc/free")                                            \
3109                                                                             \
3110   diagnostic(uintx, MallocMaxTestWords,     0,                              \
3111           "If non-zero, maximum number of words that malloc/realloc can "   \
3112           "allocate (for testing only)")                                    \
3113                                                                             \
3114   product(intx, TypeProfileWidth,     2,                                    \
3115           "Number of receiver types to record in call/cast profile")        \
3116                                                                             \
3117   develop(intx, BciProfileWidth,      2,                                    \
3118           "Number of return bci's to record in ret profile")                \
3119                                                                             \
3120   product(intx, PerMethodRecompilationCutoff, 400,                          \
3121           "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3122                                                                             \
3123   product(intx, PerBytecodeRecompilationCutoff, 200,                        \
3124           "Per-BCI limit on repeated recompilation (-1=>'Inf')")            \
3125                                                                             \
3126   product(intx, PerMethodTrapLimit,  100,                                   \
3127           "Limit on traps (of one kind) in a method (includes inlines)")    \
3128                                                                             \
3129   experimental(intx, PerMethodSpecTrapLimit,  5000,                         \
3130           "Limit on speculative traps (of one kind) in a method (includes inlines)") \
3131                                                                             \
3132   product(intx, PerBytecodeTrapLimit,  4,                                   \
3133           "Limit on traps (of one kind) at a particular BCI")               \
3134                                                                             \
3135   experimental(intx, SpecTrapLimitExtraEntries,  3,                         \
3136           "Extra method data trap entries for speculation")                 \
3137                                                                             \
3138   develop(intx, InlineFrequencyRatio,    20,                                \
3139           "Ratio of call site execution to caller method invocation")       \
3140                                                                             \
3141   develop_pd(intx, InlineFrequencyCount,                                    \
3142           "Count of call site execution necessary to trigger frequent "     \
3143           "inlining")                                                       \
3144                                                                             \
3145   develop(intx, InlineThrowCount,    50,                                    \
3146           "Force inlining of interpreted methods that throw this often")    \
3147                                                                             \
3148   develop(intx, InlineThrowMaxSize,   200,                                  \
3149           "Force inlining of throwing methods smaller than this")           \
3150                                                                             \
3151   develop(intx, ProfilerNodeSize,  1024,                                    \
3152           "Size in K to allocate for the Profile Nodes of each thread")     \
3153                                                                             \
3154   product_pd(intx, PreInflateSpin,                                          \
3155           "Number of times to spin wait before inflation")                  \
3156                                                                             \
3157   /* gc parameters */                                                       \
3158   product(uintx, InitialHeapSize, 0,                                        \
3159           "Initial heap size (in bytes); zero means use ergonomics")        \
3160                                                                             \
3161   product(uintx, MaxHeapSize, ScaleForWordSize(96*M),                       \
3162           "Maximum heap size (in bytes)")                                   \
3163                                                                             \
3164   product(uintx, OldSize, ScaleForWordSize(4*M),                            \
3165           "Initial tenured generation size (in bytes)")                     \
3166                                                                             \
3167   product(uintx, NewSize, ScaleForWordSize(1*M),                            \
3168           "Initial new generation size (in bytes)")                         \
3169                                                                             \
3170   product(uintx, MaxNewSize, max_uintx,                                     \
3171           "Maximum new generation size (in bytes), max_uintx means set "    \
3172           "ergonomically")                                                  \
3173                                                                             \
3174   product(uintx, PretenureSizeThreshold, 0,                                 \
3175           "Maximum size in bytes of objects allocated in DefNew "           \
3176           "generation; zero means no maximum")                              \
3177                                                                             \
3178   product(uintx, TLABSize, 0,                                               \
3179           "Starting TLAB size (in bytes); zero means set ergonomically")    \
3180                                                                             \
3181   product(uintx, MinTLABSize, 2*K,                                          \
3182           "Minimum allowed TLAB size (in bytes)")                           \
3183                                                                             \
3184   product(uintx, TLABAllocationWeight, 35,                                  \
3185           "Allocation averaging weight")                                    \
3186                                                                             \
3187   product(uintx, TLABWasteTargetPercent, 1,                                 \
3188           "Percentage of Eden that can be wasted")                          \
3189                                                                             \
3190   product(uintx, TLABRefillWasteFraction,    64,                            \
3191           "Maximum TLAB waste at a refill (internal fragmentation)")        \
3192                                                                             \
3193   product(uintx, TLABWasteIncrement,    4,                                  \
3194           "Increment allowed waste at slow allocation")                     \
3195                                                                             \
3196   product(uintx, SurvivorRatio, 8,                                          \
3197           "Ratio of eden/survivor space size")                              \
3198                                                                             \
3199   product(uintx, NewRatio, 2,                                               \
3200           "Ratio of old/new generation sizes")                              \
3201                                                                             \
3202   product_pd(uintx, NewSizeThreadIncrease,                                  \
3203           "Additional size added to desired new generation size per "       \
3204           "non-daemon thread (in bytes)")                                   \
3205                                                                             \
3206   product_pd(uintx, MetaspaceSize,                                          \
3207           "Initial size of Metaspaces (in bytes)")                          \
3208                                                                             \
3209   product(uintx, MaxMetaspaceSize, max_uintx,                               \
3210           "Maximum size of Metaspaces (in bytes)")                          \
3211                                                                             \
3212   product(uintx, CompressedClassSpaceSize, 1*G,                             \
3213           "Maximum size of class area in Metaspace when compressed "        \
3214           "class pointers are used")                                        \
3215                                                                             \
3216   manageable(uintx, MinHeapFreeRatio, 40,                                   \
3217           "The minimum percentage of heap free after GC to avoid expansion."\
3218           " For most GCs this applies to the old generation. In G1 and"     \
3219           " ParallelGC it applies to the whole heap.")                      \
3220                                                                             \
3221   manageable(uintx, MaxHeapFreeRatio, 70,                                   \
3222           "The maximum percentage of heap free after GC to avoid shrinking."\
3223           " For most GCs this applies to the old generation. In G1 and"     \
3224           " ParallelGC it applies to the whole heap.")                      \
3225                                                                             \
3226   product(intx, SoftRefLRUPolicyMSPerMB, 1000,                              \
3227           "Number of milliseconds per MB of free space in the heap")        \
3228                                                                             \
3229   product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K),                \
3230           "The minimum change in heap space due to GC (in bytes)")          \
3231                                                                             \
3232   product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K),            \
3233           "The minimum expansion of Metaspace (in bytes)")                  \
3234                                                                             \
3235   product(uintx, MinMetaspaceFreeRatio,    40,                              \
3236           "The minimum percentage of Metaspace free after GC to avoid "     \
3237           "expansion")                                                      \
3238                                                                             \
3239   product(uintx, MaxMetaspaceFreeRatio,    70,                              \
3240           "The maximum percentage of Metaspace free after GC to avoid "     \
3241           "shrinking")                                                      \
3242                                                                             \
3243   product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M),              \
3244           "The maximum expansion of Metaspace without full GC (in bytes)")  \
3245                                                                             \
3246   product(uintx, QueuedAllocationWarningCount, 0,                           \
3247           "Number of times an allocation that queues behind a GC "          \
3248           "will retry before printing a warning")                           \
3249                                                                             \
3250   diagnostic(uintx, VerifyGCStartAt,   0,                                   \
3251           "GC invoke count where +VerifyBefore/AfterGC kicks in")           \
3252                                                                             \
3253   diagnostic(intx, VerifyGCLevel,     0,                                    \
3254           "Generation level at which to start +VerifyBefore/AfterGC")       \
3255                                                                             \
3256   product(uintx, MaxTenuringThreshold,    15,                               \
3257           "Maximum value for tenuring threshold")                           \
3258                                                                             \
3259   product(uintx, InitialTenuringThreshold,    7,                            \
3260           "Initial value for tenuring threshold")                           \
3261                                                                             \
3262   product(uintx, TargetSurvivorRatio,    50,                                \
3263           "Desired percentage of survivor space used after scavenge")       \
3264                                                                             \
3265   product(uintx, MarkSweepDeadRatio,     5,                                 \
3266           "Percentage (0-100) of the old gen allowed as dead wood. "        \
3267           "Serial mark sweep treats this as both the minimum and maximum "  \
3268           "value. "                                                         \
3269           "CMS uses this value only if it falls back to mark sweep. "       \
3270           "Par compact uses a variable scale based on the density of the "  \
3271           "generation and treats this as the maximum value when the heap "  \
3272           "is either completely full or completely empty.  Par compact "    \
3273           "also has a smaller default value; see arguments.cpp.")           \
3274                                                                             \
3275   product(uintx, MarkSweepAlwaysCompactCount,     4,                        \
3276           "How often should we fully compact the heap (ignoring the dead "  \
3277           "space parameters)")                                              \
3278                                                                             \
3279   product(intx, PrintCMSStatistics, 0,                                      \
3280           "Statistics for CMS")                                             \
3281                                                                             \
3282   product(bool, PrintCMSInitiationStatistics, false,                        \
3283           "Statistics for initiating a CMS collection")                     \
3284                                                                             \
3285   product(intx, PrintFLSStatistics, 0,                                      \
3286           "Statistics for CMS' FreeListSpace")                              \
3287                                                                             \
3288   product(intx, PrintFLSCensus, 0,                                          \
3289           "Census for CMS' FreeListSpace")                                  \
3290                                                                             \
3291   develop(uintx, GCExpandToAllocateDelayMillis, 0,                          \
3292           "Delay between expansion and allocation (in milliseconds)")       \
3293                                                                             \
3294   develop(uintx, GCWorkerDelayMillis, 0,                                    \
3295           "Delay in scheduling GC workers (in milliseconds)")               \
3296                                                                             \
3297   product(intx, DeferThrSuspendLoopCount,     4000,                         \
3298           "(Unstable) Number of times to iterate in safepoint loop "        \
3299           "before blocking VM threads ")                                    \
3300                                                                             \
3301   product(intx, DeferPollingPageLoopCount,     -1,                          \
3302           "(Unsafe,Unstable) Number of iterations in safepoint loop "       \
3303           "before changing safepoint polling page to RO ")                  \
3304                                                                             \
3305   product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)")               \
3306                                                                             \
3307   product(bool, PSChunkLargeArrays, true,                                   \
3308           "Process large arrays in chunks")                                 \
3309                                                                             \
3310   product(uintx, GCDrainStackTargetSize, 64,                                \
3311           "Number of entries we will try to leave on the stack "            \
3312           "during parallel gc")                                             \
3313                                                                             \
3314   /* stack parameters */                                                    \
3315   product_pd(intx, StackYellowPages,                                        \
3316           "Number of yellow zone (recoverable overflows) pages")            \
3317                                                                             \
3318   product_pd(intx, StackRedPages,                                           \
3319           "Number of red zone (unrecoverable overflows) pages")             \
3320                                                                             \
3321   product_pd(intx, StackShadowPages,                                        \
3322           "Number of shadow zone (for overflow checking) pages "            \
3323           "this should exceed the depth of the VM and native call stack")   \
3324                                                                             \
3325   product_pd(intx, ThreadStackSize,                                         \
3326           "Thread Stack Size (in Kbytes)")                                  \
3327                                                                             \
3328   product_pd(intx, VMThreadStackSize,                                       \
3329           "Non-Java Thread Stack Size (in Kbytes)")                         \
3330                                                                             \
3331   product_pd(intx, CompilerThreadStackSize,                                 \
3332           "Compiler Thread Stack Size (in Kbytes)")                         \
3333                                                                             \
3334   develop_pd(uintx, JVMInvokeMethodSlack,                                   \
3335           "Stack space (bytes) required for JVM_InvokeMethod to complete")  \
3336                                                                             \
3337   product(uintx, ThreadSafetyMargin, 50*M,                                  \
3338           "Thread safety margin is used on fixed-stack LinuxThreads (on "   \
3339           "Linux/x86 only) to prevent heap-stack collision. Set to 0 to "   \
3340           "disable this feature")                                           \
3341                                                                             \
3342   /* code cache parameters */                                               \
3343   /* ppc64/tiered compilation has large code-entry alignment. */            \
3344   develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)),\
3345           "Code cache segment size (in bytes) - smallest unit of "          \
3346           "allocation")                                                     \
3347                                                                             \
3348   develop_pd(intx, CodeEntryAlignment,                                      \
3349           "Code entry alignment for generated code (in bytes)")             \
3350                                                                             \
3351   product_pd(intx, OptoLoopAlignment,                                       \
3352           "Align inner loops to zero relative to this modulus")             \
3353                                                                             \
3354   product_pd(uintx, InitialCodeCacheSize,                                   \
3355           "Initial code cache size (in bytes)")                             \
3356                                                                             \
3357   develop_pd(uintx, CodeCacheMinimumUseSpace,                               \
3358           "Minimum code cache size (in bytes) required to start VM.")       \
3359                                                                             \
3360   product_pd(uintx, ReservedCodeCacheSize,                                  \
3361           "Reserved code cache size (in bytes) - maximum code cache size")  \
3362                                                                             \
3363   product(uintx, CodeCacheMinimumFreeSpace, 500*K,                          \
3364           "When less than X space left, we stop compiling")                 \
3365                                                                             \
3366   product_pd(uintx, CodeCacheExpansionSize,                                 \
3367           "Code cache expansion size (in bytes)")                           \
3368                                                                             \
3369   develop_pd(uintx, CodeCacheMinBlockLength,                                \
3370           "Minimum number of segments in a code cache block")               \
3371                                                                             \
3372   notproduct(bool, ExitOnFullCodeCache, false,                              \
3373           "Exit the VM if we fill the code cache")                          \
3374                                                                             \
3375   product(bool, UseCodeCacheFlushing, true,                                 \
3376           "Remove cold/old nmethods from the code cache")                   \
3377                                                                             \
3378   /* interpreter debugging */                                               \
3379   develop(intx, BinarySwitchThreshold, 5,                                   \
3380           "Minimal number of lookupswitch entries for rewriting to binary " \
3381           "switch")                                                         \
3382                                                                             \
3383   develop(intx, StopInterpreterAt, 0,                                       \
3384           "Stop interpreter execution at specified bytecode number")        \
3385                                                                             \
3386   develop(intx, TraceBytecodesAt, 0,                                        \
3387           "Trace bytecodes starting with specified bytecode number")        \
3388                                                                             \
3389   /* compiler interface */                                                  \
3390   develop(intx, CIStart, 0,                                                 \
3391           "The id of the first compilation to permit")                      \
3392                                                                             \
3393   develop(intx, CIStop, max_jint,                                           \
3394           "The id of the last compilation to permit")                       \
3395                                                                             \
3396   develop(intx, CIStartOSR, 0,                                              \
3397           "The id of the first osr compilation to permit "                  \
3398           "(CICountOSR must be on)")                                        \
3399                                                                             \
3400   develop(intx, CIStopOSR, max_jint,                                        \
3401           "The id of the last osr compilation to permit "                   \
3402           "(CICountOSR must be on)")                                        \
3403                                                                             \
3404   develop(intx, CIBreakAtOSR, -1,                                           \
3405           "The id of osr compilation to break at")                          \
3406                                                                             \
3407   develop(intx, CIBreakAt, -1,                                              \
3408           "The id of compilation to break at")                              \
3409                                                                             \
3410   product(ccstrlist, CompileOnly, "",                                       \
3411           "List of methods (pkg/class.name) to restrict compilation to")    \
3412                                                                             \
3413   product(ccstr, CompileCommandFile, NULL,                                  \
3414           "Read compiler commands from this file [.hotspot_compiler]")      \
3415                                                                             \
3416   product(ccstrlist, CompileCommand, "",                                    \
3417           "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3418                                                                             \
3419   develop(bool, ReplayCompiles, false,                                      \
3420           "Enable replay of compilations from ReplayDataFile")              \
3421                                                                             \
3422   product(ccstr, ReplayDataFile, NULL,                                      \
3423           "File containing compilation replay information"                  \
3424           "[default: ./replay_pid%p.log] (%p replaced with pid)")           \
3425                                                                             \
3426    product(ccstr, InlineDataFile, NULL,                                     \
3427           "File containing inlining replay information"                     \
3428           "[default: ./inline_pid%p.log] (%p replaced with pid)")           \
3429                                                                             \
3430   develop(intx, ReplaySuppressInitializers, 2,                              \
3431           "Control handling of class initialization during replay: "        \
3432           "0 - don't do anything special; "                                 \
3433           "1 - treat all class initializers as empty; "                     \
3434           "2 - treat class initializers for application classes as empty; " \
3435           "3 - allow all class initializers to run during bootstrap but "   \
3436           "    pretend they are empty after starting replay")               \
3437                                                                             \
3438   develop(bool, ReplayIgnoreInitErrors, false,                              \
3439           "Ignore exceptions thrown during initialization for replay")      \
3440                                                                             \
3441   product(bool, DumpReplayDataOnError, true,                                \
3442           "Record replay data for crashing compiler threads")               \
3443                                                                             \
3444   product(bool, CICompilerCountPerCPU, false,                               \
3445           "1 compiler thread for log(N CPUs)")                              \
3446                                                                             \
3447   develop(intx, CIFireOOMAt,    -1,                                         \
3448           "Fire OutOfMemoryErrors throughout CI for testing the compiler "  \
3449           "(non-negative value throws OOM after this many CI accesses "     \
3450           "in each compile)")                                               \
3451   notproduct(intx, CICrashAt, -1,                                           \
3452           "id of compilation to trigger assert in compiler thread for "     \
3453           "the purpose of testing, e.g. generation of replay data")         \
3454   notproduct(bool, CIObjectFactoryVerify, false,                            \
3455           "enable potentially expensive verification in ciObjectFactory")   \
3456                                                                             \
3457   /* Priorities */                                                          \
3458   product_pd(bool, UseThreadPriorities,  "Use native thread priorities")    \
3459                                                                             \
3460   product(intx, ThreadPriorityPolicy, 0,                                    \
3461           "0 : Normal.                                                     "\
3462           "    VM chooses priorities that are appropriate for normal       "\
3463           "    applications. On Solaris NORM_PRIORITY and above are mapped "\
3464           "    to normal native priority. Java priorities below "           \
3465           "    NORM_PRIORITY map to lower native priority values. On       "\
3466           "    Windows applications are allowed to use higher native       "\
3467           "    priorities. However, with ThreadPriorityPolicy=0, VM will   "\
3468           "    not use the highest possible native priority,               "\
3469           "    THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with     "\
3470           "    system threads. On Linux thread priorities are ignored      "\
3471           "    because the OS does not support static priority in          "\
3472           "    SCHED_OTHER scheduling class which is the only choice for   "\
3473           "    non-root, non-realtime applications.                        "\
3474           "1 : Aggressive.                                                 "\
3475           "    Java thread priorities map over to the entire range of      "\
3476           "    native thread priorities. Higher Java thread priorities map "\
3477           "    to higher native thread priorities. This policy should be   "\
3478           "    used with care, as sometimes it can cause performance       "\
3479           "    degradation in the application and/or the entire system. On "\
3480           "    Linux this policy requires root privilege.")                 \
3481                                                                             \
3482   product(bool, ThreadPriorityVerbose, false,                               \
3483           "Print priority changes")                                         \
3484                                                                             \
3485   product(intx, DefaultThreadPriority, -1,                                  \
3486           "The native priority at which threads run if not elsewhere "      \
3487           "specified (-1 means no change)")                                 \
3488                                                                             \
3489   product(intx, CompilerThreadPriority, -1,                                 \
3490           "The native priority at which compiler threads should run "       \
3491           "(-1 means no change)")                                           \
3492                                                                             \
3493   product(intx, VMThreadPriority, -1,                                       \
3494           "The native priority at which the VM thread should run "          \
3495           "(-1 means no change)")                                           \
3496                                                                             \
3497   product(bool, CompilerThreadHintNoPreempt, true,                          \
3498           "(Solaris only) Give compiler threads an extra quanta")           \
3499                                                                             \
3500   product(bool, VMThreadHintNoPreempt, false,                               \
3501           "(Solaris only) Give VM thread an extra quanta")                  \
3502                                                                             \
3503   product(intx, JavaPriority1_To_OSPriority, -1,                            \
3504           "Map Java priorities to OS priorities")                           \
3505                                                                             \
3506   product(intx, JavaPriority2_To_OSPriority, -1,                            \
3507           "Map Java priorities to OS priorities")                           \
3508                                                                             \
3509   product(intx, JavaPriority3_To_OSPriority, -1,                            \
3510           "Map Java priorities to OS priorities")                           \
3511                                                                             \
3512   product(intx, JavaPriority4_To_OSPriority, -1,                            \
3513           "Map Java priorities to OS priorities")                           \
3514                                                                             \
3515   product(intx, JavaPriority5_To_OSPriority, -1,                            \
3516           "Map Java priorities to OS priorities")                           \
3517                                                                             \
3518   product(intx, JavaPriority6_To_OSPriority, -1,                            \
3519           "Map Java priorities to OS priorities")                           \
3520                                                                             \
3521   product(intx, JavaPriority7_To_OSPriority, -1,                            \
3522           "Map Java priorities to OS priorities")                           \
3523                                                                             \
3524   product(intx, JavaPriority8_To_OSPriority, -1,                            \
3525           "Map Java priorities to OS priorities")                           \
3526                                                                             \
3527   product(intx, JavaPriority9_To_OSPriority, -1,                            \
3528           "Map Java priorities to OS priorities")                           \
3529                                                                             \
3530   product(intx, JavaPriority10_To_OSPriority,-1,                            \
3531           "Map Java priorities to OS priorities")                           \
3532                                                                             \
3533   experimental(bool, UseCriticalJavaThreadPriority, false,                  \
3534           "Java thread priority 10 maps to critical scheduling priority")   \
3535                                                                             \
3536   experimental(bool, UseCriticalCompilerThreadPriority, false,              \
3537           "Compiler thread(s) run at critical scheduling priority")         \
3538                                                                             \
3539   experimental(bool, UseCriticalCMSThreadPriority, false,                   \
3540           "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3541                                                                             \
3542   /* compiler debugging */                                                  \
3543   notproduct(intx, CompileTheWorldStartAt,     1,                           \
3544           "First class to consider when using +CompileTheWorld")            \
3545                                                                             \
3546   notproduct(intx, CompileTheWorldStopAt, max_jint,                         \
3547           "Last class to consider when using +CompileTheWorld")             \
3548                                                                             \
3549   develop(intx, NewCodeParameter,      0,                                   \
3550           "Testing Only: Create a dedicated integer parameter before "      \
3551           "putback")                                                        \
3552                                                                             \
3553   /* new oopmap storage allocation */                                       \
3554   develop(intx, MinOopMapAllocation,     8,                                 \
3555           "Minimum number of OopMap entries in an OopMapSet")               \
3556                                                                             \
3557   /* Background Compilation */                                              \
3558   develop(intx, LongCompileThreshold,     50,                               \
3559           "Used with +TraceLongCompiles")                                   \
3560                                                                             \
3561   product(intx, StarvationMonitorInterval,    200,                          \
3562           "Pause between each check (in milliseconds)")                     \
3563                                                                             \
3564   /* recompilation */                                                       \
3565   product_pd(intx, CompileThreshold,                                        \
3566           "number of interpreted method invocations before (re-)compiling") \
3567                                                                             \
3568   product(intx, Tier0InvokeNotifyFreqLog, 7,                                \
3569           "Interpreter (tier 0) invocation notification frequency")         \
3570                                                                             \
3571   product(intx, Tier2InvokeNotifyFreqLog, 11,                               \
3572           "C1 without MDO (tier 2) invocation notification frequency")      \
3573                                                                             \
3574   product(intx, Tier3InvokeNotifyFreqLog, 10,                               \
3575           "C1 with MDO profiling (tier 3) invocation notification "         \
3576           "frequency")                                                      \
3577                                                                             \
3578   product(intx, Tier23InlineeNotifyFreqLog, 20,                             \
3579           "Inlinee invocation (tiers 2 and 3) notification frequency")      \
3580                                                                             \
3581   product(intx, Tier0BackedgeNotifyFreqLog, 10,                             \
3582           "Interpreter (tier 0) invocation notification frequency")         \
3583                                                                             \
3584   product(intx, Tier2BackedgeNotifyFreqLog, 14,                             \
3585           "C1 without MDO (tier 2) invocation notification frequency")      \
3586                                                                             \
3587   product(intx, Tier3BackedgeNotifyFreqLog, 13,                             \
3588           "C1 with MDO profiling (tier 3) invocation notification "         \
3589           "frequency")                                                      \
3590                                                                             \
3591   product(intx, Tier2CompileThreshold, 0,                                   \
3592           "threshold at which tier 2 compilation is invoked")               \
3593                                                                             \
3594   product(intx, Tier2BackEdgeThreshold, 0,                                  \
3595           "Back edge threshold at which tier 2 compilation is invoked")     \
3596                                                                             \
3597   product(intx, Tier3InvocationThreshold, 200,                              \
3598           "Compile if number of method invocations crosses this "           \
3599           "threshold")                                                      \
3600                                                                             \
3601   product(intx, Tier3MinInvocationThreshold, 100,                           \
3602           "Minimum invocation to compile at tier 3")                        \
3603                                                                             \
3604   product(intx, Tier3CompileThreshold, 2000,                                \
3605           "Threshold at which tier 3 compilation is invoked (invocation "   \
3606           "minimum must be satisfied")                                      \
3607                                                                             \
3608   product(intx, Tier3BackEdgeThreshold,  60000,                             \
3609           "Back edge threshold at which tier 3 OSR compilation is invoked") \
3610                                                                             \
3611   product(intx, Tier4InvocationThreshold, 5000,                             \
3612           "Compile if number of method invocations crosses this "           \
3613           "threshold")                                                      \
3614                                                                             \
3615   product(intx, Tier4MinInvocationThreshold, 600,                           \
3616           "Minimum invocation to compile at tier 4")                        \
3617                                                                             \
3618   product(intx, Tier4CompileThreshold, 15000,                               \
3619           "Threshold at which tier 4 compilation is invoked (invocation "   \
3620           "minimum must be satisfied")                                      \
3621                                                                             \
3622   product(intx, Tier4BackEdgeThreshold, 40000,                              \
3623           "Back edge threshold at which tier 4 OSR compilation is invoked") \
3624                                                                             \
3625   product(intx, Tier3DelayOn, 5,                                            \
3626           "If C2 queue size grows over this amount per compiler thread "    \
3627           "stop compiling at tier 3 and start compiling at tier 2")         \
3628                                                                             \
3629   product(intx, Tier3DelayOff, 2,                                           \
3630           "If C2 queue size is less than this amount per compiler thread "  \
3631           "allow methods compiled at tier 2 transition to tier 3")          \
3632                                                                             \
3633   product(intx, Tier3LoadFeedback, 5,                                       \
3634           "Tier 3 thresholds will increase twofold when C1 queue size "     \
3635           "reaches this amount per compiler thread")                        \
3636                                                                             \
3637   product(intx, Tier4LoadFeedback, 3,                                       \
3638           "Tier 4 thresholds will increase twofold when C2 queue size "     \
3639           "reaches this amount per compiler thread")                        \
3640                                                                             \
3641   product(intx, TieredCompileTaskTimeout, 50,                               \
3642           "Kill compile task if method was not used within "                \
3643           "given timeout in milliseconds")                                  \
3644                                                                             \
3645   product(intx, TieredStopAtLevel, 4,                                       \
3646           "Stop at given compilation level")                                \
3647                                                                             \
3648   product(intx, Tier0ProfilingStartPercentage, 200,                         \
3649           "Start profiling in interpreter if the counters exceed tier 3 "   \
3650           "thresholds by the specified percentage")                         \
3651                                                                             \
3652   product(uintx, IncreaseFirstTierCompileThresholdAt, 50,                   \
3653           "Increase the compile threshold for C1 compilation if the code "  \
3654           "cache is filled by the specified percentage")                    \
3655                                                                             \
3656   product(intx, TieredRateUpdateMinTime, 1,                                 \
3657           "Minimum rate sampling interval (in milliseconds)")               \
3658                                                                             \
3659   product(intx, TieredRateUpdateMaxTime, 25,                                \
3660           "Maximum rate sampling interval (in milliseconds)")               \
3661                                                                             \
3662   product_pd(bool, TieredCompilation,                                       \
3663           "Enable tiered compilation")                                      \
3664                                                                             \
3665   product(bool, PrintTieredEvents, false,                                   \
3666           "Print tiered events notifications")                              \
3667                                                                             \
3668   product_pd(intx, OnStackReplacePercentage,                                \
3669           "NON_TIERED number of method invocations/branches (expressed as " \
3670           "% of CompileThreshold) before (re-)compiling OSR code")          \
3671                                                                             \
3672   product(intx, InterpreterProfilePercentage, 33,                           \
3673           "NON_TIERED number of method invocations/branches (expressed as " \
3674           "% of CompileThreshold) before profiling in the interpreter")     \
3675                                                                             \
3676   develop(intx, MaxRecompilationSearchLength,    10,                        \
3677           "The maximum number of frames to inspect when searching for "     \
3678           "recompilee")                                                     \
3679                                                                             \
3680   develop(intx, MaxInterpretedSearchLength,     3,                          \
3681           "The maximum number of interpreted frames to skip when searching "\
3682           "for recompilee")                                                 \
3683                                                                             \
3684   develop(intx, DesiredMethodLimit,  8000,                                  \
3685           "The desired maximum method size (in bytecodes) after inlining")  \
3686                                                                             \
3687   develop(intx, HugeMethodLimit,  8000,                                     \
3688           "Don't compile methods larger than this if "                      \
3689           "+DontCompileHugeMethods")                                        \
3690                                                                             \
3691   /* New JDK 1.4 reflection implementation */                               \
3692                                                                             \
3693   develop(intx, FastSuperclassLimit, 8,                                     \
3694           "Depth of hardwired instanceof accelerator array")                \
3695                                                                             \
3696   /* Properties for Java libraries  */                                      \
3697                                                                             \
3698   product(uintx, MaxDirectMemorySize, 0,                                    \
3699           "Maximum total size of NIO direct-buffer allocations")            \
3700                                                                             \
3701   /* Flags used for temporary code during development  */                   \
3702                                                                             \
3703   diagnostic(bool, UseNewCode, false,                                       \
3704           "Testing Only: Use the new version while testing")                \
3705                                                                             \
3706   diagnostic(bool, UseNewCode2, false,                                      \
3707           "Testing Only: Use the new version while testing")                \
3708                                                                             \
3709   diagnostic(bool, UseNewCode3, false,                                      \
3710           "Testing Only: Use the new version while testing")                \
3711                                                                             \
3712   /* flags for performance data collection */                               \
3713                                                                             \
3714   product(bool, UsePerfData, falseInEmbedded,                               \
3715           "Flag to disable jvmstat instrumentation for performance testing "\
3716           "and problem isolation purposes")                                 \
3717                                                                             \
3718   product(bool, PerfDataSaveToFile, false,                                  \
3719           "Save PerfData memory to hsperfdata_<pid> file on exit")          \
3720                                                                             \
3721   product(ccstr, PerfDataSaveFile, NULL,                                    \
3722           "Save PerfData memory to the specified absolute pathname. "       \
3723           "The string %p in the file name (if present) "                    \
3724           "will be replaced by pid")                                        \
3725                                                                             \
3726   product(intx, PerfDataSamplingInterval, 50,                               \
3727           "Data sampling interval (in milliseconds)")                       \
3728                                                                             \
3729   develop(bool, PerfTraceDataCreation, false,                               \
3730           "Trace creation of Performance Data Entries")                     \
3731                                                                             \
3732   develop(bool, PerfTraceMemOps, false,                                     \
3733           "Trace PerfMemory create/attach/detach calls")                    \
3734                                                                             \
3735   product(bool, PerfDisableSharedMem, false,                                \
3736           "Store performance data in standard memory")                      \
3737                                                                             \
3738   product(intx, PerfDataMemorySize, 32*K,                                   \
3739           "Size of performance data memory region. Will be rounded "        \
3740           "up to a multiple of the native os page size.")                   \
3741                                                                             \
3742   product(intx, PerfMaxStringConstLength, 1024,                             \
3743           "Maximum PerfStringConstant string length before truncation")     \
3744                                                                             \
3745   product(bool, PerfAllowAtExitRegistration, false,                         \
3746           "Allow registration of atexit() methods")                         \
3747                                                                             \
3748   product(bool, PerfBypassFileSystemCheck, false,                           \
3749           "Bypass Win32 file system criteria checks (Windows Only)")        \
3750                                                                             \
3751   product(intx, UnguardOnExecutionViolation, 0,                             \
3752           "Unguard page and retry on no-execute fault (Win32 only) "        \
3753           "0=off, 1=conservative, 2=aggressive")                            \
3754                                                                             \
3755   /* Serviceability Support */                                              \
3756                                                                             \
3757   product(bool, ManagementServer, false,                                    \
3758           "Create JMX Management Server")                                   \
3759                                                                             \
3760   product(bool, DisableAttachMechanism, false,                              \
3761           "Disable mechanism that allows tools to attach to this VM")       \
3762                                                                             \
3763   product(bool, StartAttachListener, false,                                 \
3764           "Always start Attach Listener at VM startup")                     \
3765                                                                             \
3766   manageable(bool, PrintConcurrentLocks, false,                             \
3767           "Print java.util.concurrent locks in thread dump")                \
3768                                                                             \
3769   product(bool, TransmitErrorReport, false,                                 \
3770           "Enable error report transmission on erroneous termination")      \
3771                                                                             \
3772   product(ccstr, ErrorReportServer, NULL,                                   \
3773           "Override built-in error report server address")                  \
3774                                                                             \
3775   /* Shared spaces */                                                       \
3776                                                                             \
3777   product(bool, UseSharedSpaces, true,                                      \
3778           "Use shared spaces for metadata")                                 \
3779                                                                             \
3780   product(bool, RequireSharedSpaces, false,                                 \
3781           "Require shared spaces for metadata")                             \
3782                                                                             \
3783   product(bool, DumpSharedSpaces, false,                                    \
3784           "Special mode: JVM reads a class list, loads classes, builds "    \
3785           "shared spaces, and dumps the shared spaces to a file to be "     \
3786           "used in future JVM runs")                                        \
3787                                                                             \
3788   product(bool, PrintSharedSpaces, false,                                   \
3789           "Print usage of shared spaces")                                   \
3790                                                                             \
3791   product(bool, PrintSharedArchiveAndExit, false,                           \
3792           "Print shared archive file contents")                             \
3793                                                                             \
3794   product(bool, PrintSharedDictionary, false,                               \
3795           "If PrintSharedArchiveAndExit is true, also print the shared "    \
3796           "dictionary")                                                     \
3797                                                                             \
3798   product(uintx, SharedReadWriteSize,  NOT_LP64(12*M) LP64_ONLY(16*M),      \
3799           "Size of read-write space for metadata (in bytes)")               \
3800                                                                             \
3801   product(uintx, SharedReadOnlySize,  NOT_LP64(12*M) LP64_ONLY(16*M),       \
3802           "Size of read-only space for metadata (in bytes)")                \
3803                                                                             \
3804   product(uintx, SharedMiscDataSize,    NOT_LP64(2*M) LP64_ONLY(4*M),       \
3805           "Size of the shared miscellaneous data area (in bytes)")          \
3806                                                                             \
3807   product(uintx, SharedMiscCodeSize,    120*K,                              \
3808           "Size of the shared miscellaneous code area (in bytes)")          \
3809                                                                             \
3810   product(uintx, SharedBaseAddress, LP64_ONLY(32*G)                         \
3811           NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)),                           \
3812           "Address to allocate shared memory region for class data")        \
3813                                                                             \
3814   diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false,              \
3815           "Do not quit -Xshare:dump even if we encounter unverifiable "     \
3816           "classes. Just exclude them from the shared dictionary.")         \
3817                                                                             \
3818   diagnostic(bool, PrintMethodHandleStubs, false,                           \
3819           "Print generated stub code for method handles")                   \
3820                                                                             \
3821   develop(bool, TraceMethodHandles, false,                                  \
3822           "trace internal method handle operations")                        \
3823                                                                             \
3824   diagnostic(bool, VerifyMethodHandles, trueInDebug,                        \
3825           "perform extra checks when constructing method handles")          \
3826                                                                             \
3827   diagnostic(bool, ShowHiddenFrames, false,                                 \
3828           "show method handle implementation frames (usually hidden)")      \
3829                                                                             \
3830   experimental(bool, TrustFinalNonStaticFields, false,                      \
3831           "trust final non-static declarations for constant folding")       \
3832                                                                             \
3833   diagnostic(bool, FoldStableValues, true,                                  \
3834           "Optimize loads from stable fields (marked w/ @Stable)")          \
3835                                                                             \
3836   develop(bool, TraceInvokeDynamic, false,                                  \
3837           "trace internal invoke dynamic operations")                       \
3838                                                                             \
3839   diagnostic(bool, PauseAtStartup,      false,                              \
3840           "Causes the VM to pause at startup time and wait for the pause "  \
3841           "file to be removed (default: ./vm.paused.<pid>)")                \
3842                                                                             \
3843   diagnostic(ccstr, PauseAtStartupFile, NULL,                               \
3844           "The file to create and for whose removal to await when pausing " \
3845           "at startup. (default: ./vm.paused.<pid>)")                       \
3846                                                                             \
3847   diagnostic(bool, PauseAtExit, false,                                      \
3848           "Pause and wait for keypress on exit if a debugger is attached")  \
3849                                                                             \
3850   product(bool, ExtendedDTraceProbes,    false,                             \
3851           "Enable performance-impacting dtrace probes")                     \
3852                                                                             \
3853   product(bool, DTraceMethodProbes, false,                                  \
3854           "Enable dtrace probes for method-entry and method-exit")          \
3855                                                                             \
3856   product(bool, DTraceAllocProbes, false,                                   \
3857           "Enable dtrace probes for object allocation")                     \
3858                                                                             \
3859   product(bool, DTraceMonitorProbes, false,                                 \
3860           "Enable dtrace probes for monitor events")                        \
3861                                                                             \
3862   product(bool, RelaxAccessControlCheck, false,                             \
3863           "Relax the access control checks in the verifier")                \
3864                                                                             \
3865   diagnostic(bool, PrintDTraceDOF, false,                                   \
3866           "Print the DTrace DOF passed to the system for JSDT probes")      \
3867                                                                             \
3868   product(uintx, StringTableSize, defaultStringTableSize,                   \
3869           "Number of buckets in the interned String table")                 \
3870                                                                             \
3871   experimental(uintx, SymbolTableSize, defaultSymbolTableSize,              \
3872           "Number of buckets in the JVM internal Symbol table")             \
3873                                                                             \
3874   product(bool, UseStringDeduplication, false,                              \
3875           "Use string deduplication")                                       \
3876                                                                             \
3877   product(bool, PrintStringDeduplicationStatistics, false,                  \
3878           "Print string deduplication statistics")                          \
3879                                                                             \
3880   product(uintx, StringDeduplicationAgeThreshold, 3,                        \
3881           "A string must reach this age (or be promoted to an old region) " \
3882           "to be considered for deduplication")                             \
3883                                                                             \
3884   diagnostic(bool, StringDeduplicationResizeALot, false,                    \
3885           "Force table resize every time the table is scanned")             \
3886                                                                             \
3887   diagnostic(bool, StringDeduplicationRehashALot, false,                    \
3888           "Force table rehash every time the table is scanned")             \
3889                                                                             \
3890   develop(bool, TraceDefaultMethods, false,                                 \
3891           "Trace the default method processing steps")                      \
3892                                                                             \
3893   develop(bool, VerifyGenericSignatures, false,                             \
3894           "Abort VM on erroneous or inconsistent generic signatures")       \
3895                                                                             \
3896   diagnostic(bool, WhiteBoxAPI, false,                                      \
3897           "Enable internal testing APIs")                                   \
3898                                                                             \
3899   product(bool, PrintGCCause, true,                                         \
3900           "Include GC cause in GC logging")                                 \
3901                                                                             \
3902   experimental(intx, SurvivorAlignmentInBytes, 0,                           \
3903            "Default survivor space alignment in bytes")                     \
3904                                                                             \
3905   product(bool , AllowNonVirtualCalls, false,                               \
3906           "Obey the ACC_SUPER flag and allow invokenonvirtual calls")       \
3907                                                                             \
3908   product(ccstr, DumpLoadedClassList, NULL,                                 \
3909           "Dump the names all loaded classes, that could be stored into "   \
3910           "the CDS archive, in the specified file")                         \
3911                                                                             \
3912   product(ccstr, SharedClassListFile, NULL,                                 \
3913           "Override the default CDS class list")                            \
3914                                                                             \
3915   diagnostic(ccstr, SharedArchiveFile, NULL,                                \
3916           "Override the default location of the CDS archive file")          \
3917                                                                             \
3918   product(ccstr, ExtraSharedClassListFile, NULL,                            \
3919           "Extra classlist for building the CDS archive file")              \
3920                                                                             \
3921   experimental(size_t, ArrayAllocatorMallocLimit,                           \
3922           SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1),                       \
3923           "Allocation less than this value will be allocated "              \
3924           "using malloc. Larger allocations will use mmap.")                \
3925                                                                             \
3926   experimental(bool, AlwaysAtomicAccesses, false,                           \
3927           "Accesses to all variables should always be atomic")              \
3928                                                                             \
3929   product(bool, EnableTracing, false,                                       \
3930           "Enable event-based tracing")                                     \
3931                                                                             \
3932   product(bool, UseLockedTracing, false,                                    \
3933           "Use locked-tracing when doing event-based tracing")
3934 
3935 /*
3936  *  Macros for factoring of globals
3937  */
3938 
3939 // Interface macros
3940 #define DECLARE_PRODUCT_FLAG(type, name, value, doc)      extern "C" type name;
3941 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc)          extern "C" type name;
3942 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc)   extern "C" type name;
3943 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3944 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc)   extern "C" type name;
3945 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc)   extern "C" type name;
3946 #ifdef PRODUCT
3947 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type CONST_##name; const type name = value;
3948 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type CONST_##name; const type name = pd_##name;
3949 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type CONST_##name;
3950 #else
3951 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type name;
3952 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type name;
3953 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type name;
3954 #endif
3955 // Special LP64 flags, product only needed for now.
3956 #ifdef _LP64
3957 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3958 #else
3959 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3960 #endif // _LP64
3961 
3962 // Implementation macros
3963 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc)      type name = value;
3964 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc)          type name = pd_##name;
3965 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc)   type name = value;
3966 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3967 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc)   type name = value;
3968 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc)   type name = value;
3969 #ifdef PRODUCT
3970 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type CONST_##name = value;
3971 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type CONST_##name = pd_##name;
3972 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type CONST_##name = value;
3973 #else
3974 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type name = value;
3975 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type name = pd_##name;
3976 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type name = value;
3977 #endif
3978 #ifdef _LP64
3979 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3980 #else
3981 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3982 #endif // _LP64
3983 
3984 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)
3985 
3986 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3987 
3988 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
3989 
3990 // Extensions
3991 
3992 #include "runtime/globals_ext.hpp"
3993 
3994 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP
--- EOF ---