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, NonProfiledCodeHeapSize,      0);
 190 define_pd_global(intx, ProfiledCodeHeapSize,         0);
 191 define_pd_global(intx, NonNMethodCodeHeapSize,        32*M);
 192 
 193 define_pd_global(intx, CodeCacheExpansionSize,       32*K);
 194 define_pd_global(intx, CodeCacheMinBlockLength,      1);
 195 define_pd_global(intx, CodeCacheMinimumUseSpace,     200*K);
 196 define_pd_global(uintx,MetaspaceSize,    ScaleForWordSize(4*M));
 197 define_pd_global(bool, NeverActAsServerClassMachine, true);
 198 define_pd_global(uint64_t,MaxRAM,                    1ULL*G);
 199 #define CI_COMPILER_COUNT 0
 200 #else
 201 
 202 #ifdef COMPILER2
 203 #define CI_COMPILER_COUNT 2
 204 #else
 205 #define CI_COMPILER_COUNT 1
 206 #endif // COMPILER2
 207 
 208 #endif // no compilers
 209 
 210 // string type aliases used only in this file
 211 typedef const char* ccstr;
 212 typedef const char* ccstrlist;   // represents string arguments which accumulate
 213 
 214 struct Flag {
 215   enum Flags {
 216     // value origin
 217     DEFAULT          = 0,
 218     COMMAND_LINE     = 1,
 219     ENVIRON_VAR      = 2,
 220     CONFIG_FILE      = 3,
 221     MANAGEMENT       = 4,
 222     ERGONOMIC        = 5,
 223     ATTACH_ON_DEMAND = 6,
 224     INTERNAL         = 7,
 225 
 226     LAST_VALUE_ORIGIN = INTERNAL,
 227     VALUE_ORIGIN_BITS = 4,
 228     VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
 229 
 230     // flag kind
 231     KIND_PRODUCT            = 1 << 4,
 232     KIND_MANAGEABLE         = 1 << 5,
 233     KIND_DIAGNOSTIC         = 1 << 6,
 234     KIND_EXPERIMENTAL       = 1 << 7,
 235     KIND_NOT_PRODUCT        = 1 << 8,
 236     KIND_DEVELOP            = 1 << 9,
 237     KIND_PLATFORM_DEPENDENT = 1 << 10,
 238     KIND_READ_WRITE         = 1 << 11,
 239     KIND_C1                 = 1 << 12,
 240     KIND_C2                 = 1 << 13,
 241     KIND_ARCH               = 1 << 14,
 242     KIND_SHARK              = 1 << 15,
 243     KIND_LP64_PRODUCT       = 1 << 16,
 244     KIND_COMMERCIAL         = 1 << 17,
 245 
 246     KIND_MASK = ~VALUE_ORIGIN_MASK
 247   };
 248 
 249   const char* _type;
 250   const char* _name;
 251   void* _addr;
 252   NOT_PRODUCT(const char* _doc;)
 253   Flags _flags;
 254 
 255   // points to all Flags static array
 256   static Flag* flags;
 257 
 258   // number of flags
 259   static size_t numFlags;
 260 
 261   static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false);
 262   static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
 263 
 264   void check_writable();
 265 
 266   bool is_bool() const;
 267   bool get_bool() const;
 268   void set_bool(bool value);
 269 
 270   bool is_intx() const;
 271   intx get_intx() const;
 272   void set_intx(intx value);
 273 
 274   bool is_uintx() const;
 275   uintx get_uintx() const;
 276   void set_uintx(uintx value);
 277 
 278   bool is_uint64_t() const;
 279   uint64_t get_uint64_t() const;
 280   void set_uint64_t(uint64_t value);
 281 
 282   bool is_size_t() const;
 283   size_t get_size_t() const;
 284   void set_size_t(size_t value);
 285 
 286   bool is_double() const;
 287   double get_double() const;
 288   void set_double(double value);
 289 
 290   bool is_ccstr() const;
 291   bool ccstr_accumulates() const;
 292   ccstr get_ccstr() const;
 293   void set_ccstr(ccstr value);
 294 
 295   Flags get_origin();
 296   void set_origin(Flags origin);
 297 
 298   bool is_default();
 299   bool is_ergonomic();
 300   bool is_command_line();
 301 
 302   bool is_product() const;
 303   bool is_manageable() const;
 304   bool is_diagnostic() const;
 305   bool is_experimental() const;
 306   bool is_notproduct() const;
 307   bool is_develop() const;
 308   bool is_read_write() const;
 309   bool is_commercial() const;
 310 
 311   bool is_constant_in_binary() const;
 312 
 313   bool is_unlocker() const;
 314   bool is_unlocked() const;
 315   bool is_writeable() const;
 316   bool is_external() const;
 317 
 318   bool is_unlocker_ext() const;
 319   bool is_unlocked_ext() const;
 320   bool is_writeable_ext() const;
 321   bool is_external_ext() const;
 322 
 323   void get_locked_message(char*, int) const;
 324   void get_locked_message_ext(char*, int) const;
 325 
 326   void print_on(outputStream* st, bool withComments = false );
 327   void print_kind(outputStream* st);
 328   void print_as_flag(outputStream* st);
 329 };
 330 
 331 // debug flags control various aspects of the VM and are global accessible
 332 
 333 // use FlagSetting to temporarily change some debug flag
 334 // e.g. FlagSetting fs(DebugThisAndThat, true);
 335 // restored to previous value upon leaving scope
 336 class FlagSetting {
 337   bool val;
 338   bool* flag;
 339  public:
 340   FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
 341   ~FlagSetting()                       { *flag = val; }
 342 };
 343 
 344 
 345 class CounterSetting {
 346   intx* counter;
 347  public:
 348   CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
 349   ~CounterSetting()         { (*counter)--; }
 350 };
 351 
 352 
 353 class UIntFlagSetting {
 354   uintx val;
 355   uintx* flag;
 356  public:
 357   UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
 358   ~UIntFlagSetting()                         { *flag = val; }
 359 };
 360 
 361 class DoubleFlagSetting {
 362   double val;
 363   double* flag;
 364  public:
 365   DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
 366   ~DoubleFlagSetting()                           { *flag = val; }
 367 };
 368 
 369 class SizeTFlagSetting {
 370   size_t val;
 371   size_t* flag;
 372  public:
 373   SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; }
 374   ~SizeTFlagSetting()                           { *flag = val; }
 375 };
 376 
 377 
 378 class CommandLineFlags {
 379  public:
 380   static bool boolAt(const char* name, size_t len, bool* value);
 381   static bool boolAt(const char* name, bool* value)      { return boolAt(name, strlen(name), value); }
 382   static bool boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin);
 383   static bool boolAtPut(const char* name, bool* value, Flag::Flags origin)   { return boolAtPut(name, strlen(name), value, origin); }
 384 
 385   static bool intxAt(const char* name, size_t len, intx* value);
 386   static bool intxAt(const char* name, intx* value)      { return intxAt(name, strlen(name), value); }
 387   static bool intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin);
 388   static bool intxAtPut(const char* name, intx* value, Flag::Flags origin)   { return intxAtPut(name, strlen(name), value, origin); }
 389 
 390   static bool uintxAt(const char* name, size_t len, uintx* value);
 391   static bool uintxAt(const char* name, uintx* value)    { return uintxAt(name, strlen(name), value); }
 392   static bool uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin);
 393   static bool uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
 394 
 395   static bool size_tAt(const char* name, size_t len, size_t* value);
 396   static bool size_tAt(const char* name, size_t* value)    { return size_tAt(name, strlen(name), value); }
 397   static bool size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin);
 398   static bool size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); }
 399 
 400   static bool uint64_tAt(const char* name, size_t len, uint64_t* value);
 401   static bool uint64_tAt(const char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
 402   static bool uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin);
 403   static bool uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
 404 
 405   static bool doubleAt(const char* name, size_t len, double* value);
 406   static bool doubleAt(const char* name, double* value)    { return doubleAt(name, strlen(name), value); }
 407   static bool doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin);
 408   static bool doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
 409 
 410   static bool ccstrAt(const char* name, size_t len, ccstr* value);
 411   static bool ccstrAt(const char* name, ccstr* value)    { return ccstrAt(name, strlen(name), value); }
 412   // Contract:  Flag will make private copy of the incoming value.
 413   // Outgoing value is always malloc-ed, and caller MUST call free.
 414   static bool ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin);
 415   static bool ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
 416 
 417   // Returns false if name is not a command line flag.
 418   static bool wasSetOnCmdline(const char* name, bool* value);
 419   static void printSetFlags(outputStream* out);
 420 
 421   static void printFlags(outputStream* out, bool withComments);
 422 
 423   static void verify() PRODUCT_RETURN;
 424 };
 425 
 426 // use this for flags that are true by default in the debug version but
 427 // false in the optimized version, and vice versa
 428 #ifdef ASSERT
 429 #define trueInDebug  true
 430 #define falseInDebug false
 431 #else
 432 #define trueInDebug  false
 433 #define falseInDebug true
 434 #endif
 435 
 436 // use this for flags that are true per default in the product build
 437 // but false in development builds, and vice versa
 438 #ifdef PRODUCT
 439 #define trueInProduct  true
 440 #define falseInProduct false
 441 #else
 442 #define trueInProduct  false
 443 #define falseInProduct true
 444 #endif
 445 
 446 #ifdef JAVASE_EMBEDDED
 447 #define falseInEmbedded false
 448 #else
 449 #define falseInEmbedded true
 450 #endif
 451 
 452 // develop flags are settable / visible only during development and are constant in the PRODUCT version
 453 // product flags are always settable / visible
 454 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
 455 
 456 // A flag must be declared with one of the following types:
 457 // bool, intx, uintx, ccstr.
 458 // The type "ccstr" is an alias for "const char*" and is used
 459 // only in this file, because the macrology requires single-token type names.
 460 
 461 // Note: Diagnostic options not meant for VM tuning or for product modes.
 462 // They are to be used for VM quality assurance or field diagnosis
 463 // of VM bugs.  They are hidden so that users will not be encouraged to
 464 // try them as if they were VM ordinary execution options.  However, they
 465 // are available in the product version of the VM.  Under instruction
 466 // from support engineers, VM customers can turn them on to collect
 467 // diagnostic information about VM problems.  To use a VM diagnostic
 468 // option, you must first specify +UnlockDiagnosticVMOptions.
 469 // (This master switch also affects the behavior of -Xprintflags.)
 470 //
 471 // experimental flags are in support of features that are not
 472 //    part of the officially supported product, but are available
 473 //    for experimenting with. They could, for example, be performance
 474 //    features that may not have undergone full or rigorous QA, but which may
 475 //    help performance in some cases and released for experimentation
 476 //    by the community of users and developers. This flag also allows one to
 477 //    be able to build a fully supported product that nonetheless also
 478 //    ships with some unsupported, lightly tested, experimental features.
 479 //    Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
 480 //    UnlockExperimentalVMOptions flag, which allows the control and
 481 //    modification of the experimental flags.
 482 //
 483 // Nota bene: neither diagnostic nor experimental options should be used casually,
 484 //    and they are not supported on production loads, except under explicit
 485 //    direction from support engineers.
 486 //
 487 // manageable flags are writeable external product flags.
 488 //    They are dynamically writeable through the JDK management interface
 489 //    (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
 490 //    These flags are external exported interface (see CCC).  The list of
 491 //    manageable flags can be queried programmatically through the management
 492 //    interface.
 493 //
 494 //    A flag can be made as "manageable" only if
 495 //    - the flag is defined in a CCC as an external exported interface.
 496 //    - the VM implementation supports dynamic setting of the flag.
 497 //      This implies that the VM must *always* query the flag variable
 498 //      and not reuse state related to the flag state at any given time.
 499 //    - you want the flag to be queried programmatically by the customers.
 500 //
 501 // product_rw flags are writeable internal product flags.
 502 //    They are like "manageable" flags but for internal/private use.
 503 //    The list of product_rw flags are internal/private flags which
 504 //    may be changed/removed in a future release.  It can be set
 505 //    through the management interface to get/set value
 506 //    when the name of flag is supplied.
 507 //
 508 //    A flag can be made as "product_rw" only if
 509 //    - the VM implementation supports dynamic setting of the flag.
 510 //      This implies that the VM must *always* query the flag variable
 511 //      and not reuse state related to the flag state at any given time.
 512 //
 513 // Note that when there is a need to support develop flags to be writeable,
 514 // it can be done in the same way as product_rw.
 515 
 516 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
 517                                                                             \
 518   lp64_product(bool, UseCompressedOops, false,                              \
 519           "Use 32-bit object references in 64-bit VM. "                     \
 520           "lp64_product means flag is always constant in 32 bit VM")        \
 521                                                                             \
 522   lp64_product(bool, UseCompressedClassPointers, false,                     \
 523           "Use 32-bit class pointers in 64-bit VM. "                        \
 524           "lp64_product means flag is always constant in 32 bit VM")        \
 525                                                                             \
 526   notproduct(bool, CheckCompressedOops, true,                               \
 527           "Generate checks in encoding/decoding code in debug VM")          \
 528                                                                             \
 529   product_pd(uintx, HeapBaseMinAddress,                                     \
 530           "OS specific low limit for heap base address")                    \
 531                                                                             \
 532   diagnostic(bool, PrintCompressedOopsMode, false,                          \
 533           "Print compressed oops base address and encoding mode")           \
 534                                                                             \
 535   lp64_product(intx, ObjectAlignmentInBytes, 8,                             \
 536           "Default object alignment in bytes, 8 is minimum")                \
 537                                                                             \
 538   product(bool, AssumeMP, false,                                            \
 539           "Instruct the VM to assume multiple processors are available")    \
 540                                                                             \
 541   /* UseMembar is theoretically a temp flag used for memory barrier         \
 542    * removal testing.  It was supposed to be removed before FCS but has     \
 543    * been re-added (see 6401008) */                                         \
 544   product_pd(bool, UseMembar,                                               \
 545           "(Unstable) Issues membars on thread state transitions")          \
 546                                                                             \
 547   develop(bool, CleanChunkPoolAsync, falseInEmbedded,                       \
 548           "Clean the chunk pool asynchronously")                            \
 549                                                                             \
 550   experimental(bool, AlwaysSafeConstructors, false,                         \
 551           "Force safe construction, as if all fields are final.")           \
 552                                                                             \
 553   /* Temporary: See 6948537 */                                              \
 554   experimental(bool, UseMemSetInBOT, true,                                  \
 555           "(Unstable) uses memset in BOT updates in GC code")               \
 556                                                                             \
 557   diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug,                  \
 558           "Enable normal processing of flags relating to field diagnostics")\
 559                                                                             \
 560   experimental(bool, UnlockExperimentalVMOptions, false,                    \
 561           "Enable normal processing of flags relating to experimental "     \
 562           "features")                                                       \
 563                                                                             \
 564   product(bool, JavaMonitorsInStackTrace, true,                             \
 565           "Print information about Java monitor locks when the stacks are"  \
 566           "dumped")                                                         \
 567                                                                             \
 568   product_pd(bool, UseLargePages,                                           \
 569           "Use large page memory")                                          \
 570                                                                             \
 571   product_pd(bool, UseLargePagesIndividualAllocation,                       \
 572           "Allocate large pages individually for better affinity")          \
 573                                                                             \
 574   develop(bool, LargePagesIndividualAllocationInjectError, false,           \
 575           "Fail large pages individual allocation")                         \
 576                                                                             \
 577   product(bool, UseLargePagesInMetaspace, false,                            \
 578           "Use large page memory in metaspace. "                            \
 579           "Only used if UseLargePages is enabled.")                         \
 580                                                                             \
 581   develop(bool, TracePageSizes, false,                                      \
 582           "Trace page size selection and usage")                            \
 583                                                                             \
 584   product(bool, UseNUMA, false,                                             \
 585           "Use NUMA if available")                                          \
 586                                                                             \
 587   product(bool, UseNUMAInterleaving, false,                                 \
 588           "Interleave memory across NUMA nodes if available")               \
 589                                                                             \
 590   product(uintx, NUMAInterleaveGranularity, 2*M,                            \
 591           "Granularity to use for NUMA interleaving on Windows OS")         \
 592                                                                             \
 593   product(bool, ForceNUMA, false,                                           \
 594           "Force NUMA optimizations on single-node/UMA systems")            \
 595                                                                             \
 596   product(uintx, NUMAChunkResizeWeight, 20,                                 \
 597           "Percentage (0-100) used to weight the current sample when "      \
 598           "computing exponentially decaying average for "                   \
 599           "AdaptiveNUMAChunkSizing")                                        \
 600                                                                             \
 601   product(uintx, NUMASpaceResizeRate, 1*G,                                  \
 602           "Do not reallocate more than this amount per collection")         \
 603                                                                             \
 604   product(bool, UseAdaptiveNUMAChunkSizing, true,                           \
 605           "Enable adaptive chunk sizing for NUMA")                          \
 606                                                                             \
 607   product(bool, NUMAStats, false,                                           \
 608           "Print NUMA stats in detailed heap information")                  \
 609                                                                             \
 610   product(uintx, NUMAPageScanRate, 256,                                     \
 611           "Maximum number of pages to include in the page scan procedure")  \
 612                                                                             \
 613   product_pd(bool, NeedsDeoptSuspend,                                       \
 614           "True for register window machines (sparc/ia64)")                 \
 615                                                                             \
 616   product(intx, UseSSE, 99,                                                 \
 617           "Highest supported SSE instructions set on x86/x64")              \
 618                                                                             \
 619   product(bool, UseAES, false,                                              \
 620           "Control whether AES instructions can be used on x86/x64")        \
 621                                                                             \
 622   product(bool, UseSHA, false,                                              \
 623           "Control whether SHA instructions can be used on SPARC")          \
 624                                                                             \
 625   product(uintx, LargePageSizeInBytes, 0,                                   \
 626           "Large page size (0 to let VM choose the page size)")             \
 627                                                                             \
 628   product(uintx, LargePageHeapSizeThreshold, 128*M,                         \
 629           "Use large pages if maximum heap is at least this big")           \
 630                                                                             \
 631   product(bool, ForceTimeHighResolution, false,                             \
 632           "Using high time resolution (for Win32 only)")                    \
 633                                                                             \
 634   develop(bool, TraceItables, false,                                        \
 635           "Trace initialization and use of itables")                        \
 636                                                                             \
 637   develop(bool, TracePcPatching, false,                                     \
 638           "Trace usage of frame::patch_pc")                                 \
 639                                                                             \
 640   develop(bool, TraceJumps, false,                                          \
 641           "Trace assembly jumps in thread ring buffer")                     \
 642                                                                             \
 643   develop(bool, TraceRelocator, false,                                      \
 644           "Trace the bytecode relocator")                                   \
 645                                                                             \
 646   develop(bool, TraceLongCompiles, false,                                   \
 647           "Print out every time compilation is longer than "                \
 648           "a given threshold")                                              \
 649                                                                             \
 650   develop(bool, SafepointALot, false,                                       \
 651           "Generate a lot of safepoints. This works with "                  \
 652           "GuaranteedSafepointInterval")                                    \
 653                                                                             \
 654   product_pd(bool, BackgroundCompilation,                                   \
 655           "A thread requesting compilation is not blocked during "          \
 656           "compilation")                                                    \
 657                                                                             \
 658   product(bool, PrintVMQWaitTime, false,                                    \
 659           "Print out the waiting time in VM operation queue")               \
 660                                                                             \
 661   develop(bool, NoYieldsInMicrolock, false,                                 \
 662           "Disable yields in microlock")                                    \
 663                                                                             \
 664   develop(bool, TraceOopMapGeneration, false,                               \
 665           "Show OopMapGeneration")                                          \
 666                                                                             \
 667   product(bool, MethodFlushing, true,                                       \
 668           "Reclamation of zombie and not-entrant methods")                  \
 669                                                                             \
 670   develop(bool, VerifyStack, false,                                         \
 671           "Verify stack of each thread when it is entering a runtime call") \
 672                                                                             \
 673   diagnostic(bool, ForceUnreachable, false,                                 \
 674           "Make all non code cache addresses to be unreachable by "         \
 675           "forcing use of 64bit literal fixups")                            \
 676                                                                             \
 677   notproduct(bool, StressDerivedPointers, false,                            \
 678           "Force scavenge when a derived pointer is detected on stack "     \
 679           "after rtm call")                                                 \
 680                                                                             \
 681   develop(bool, TraceDerivedPointers, false,                                \
 682           "Trace traversal of derived pointers on stack")                   \
 683                                                                             \
 684   notproduct(bool, TraceCodeBlobStacks, false,                              \
 685           "Trace stack-walk of codeblobs")                                  \
 686                                                                             \
 687   product(bool, PrintJNIResolving, false,                                   \
 688           "Used to implement -v:jni")                                       \
 689                                                                             \
 690   notproduct(bool, PrintRewrites, false,                                    \
 691           "Print methods that are being rewritten")                         \
 692                                                                             \
 693   product(bool, UseInlineCaches, true,                                      \
 694           "Use Inline Caches for virtual calls ")                           \
 695                                                                             \
 696   develop(bool, InlineArrayCopy, true,                                      \
 697           "Inline arraycopy native that is known to be part of "            \
 698           "base library DLL")                                               \
 699                                                                             \
 700   develop(bool, InlineObjectHash, true,                                     \
 701           "Inline Object::hashCode() native that is known to be part "      \
 702           "of base library DLL")                                            \
 703                                                                             \
 704   develop(bool, InlineNatives, true,                                        \
 705           "Inline natives that are known to be part of base library DLL")   \
 706                                                                             \
 707   develop(bool, InlineMathNatives, true,                                    \
 708           "Inline SinD, CosD, etc.")                                        \
 709                                                                             \
 710   develop(bool, InlineClassNatives, true,                                   \
 711           "Inline Class.isInstance, etc")                                   \
 712                                                                             \
 713   develop(bool, InlineThreadNatives, true,                                  \
 714           "Inline Thread.currentThread, etc")                               \
 715                                                                             \
 716   develop(bool, InlineUnsafeOps, true,                                      \
 717           "Inline memory ops (native methods) from sun.misc.Unsafe")        \
 718                                                                             \
 719   product(bool, CriticalJNINatives, true,                                   \
 720           "Check for critical JNI entry points")                            \
 721                                                                             \
 722   notproduct(bool, StressCriticalJNINatives, false,                         \
 723           "Exercise register saving code in critical natives")              \
 724                                                                             \
 725   product(bool, UseSSE42Intrinsics, false,                                  \
 726           "SSE4.2 versions of intrinsics")                                  \
 727                                                                             \
 728   product(bool, UseAESIntrinsics, false,                                    \
 729           "Use intrinsics for AES versions of crypto")                      \
 730                                                                             \
 731   product(bool, UseSHA1Intrinsics, false,                                   \
 732           "Use intrinsics for SHA-1 crypto hash function")                  \
 733                                                                             \
 734   product(bool, UseSHA256Intrinsics, false,                                 \
 735           "Use intrinsics for SHA-224 and SHA-256 crypto hash functions")   \
 736                                                                             \
 737   product(bool, UseSHA512Intrinsics, false,                                 \
 738           "Use intrinsics for SHA-384 and SHA-512 crypto hash functions")   \
 739                                                                             \
 740   product(bool, UseCRC32Intrinsics, false,                                  \
 741           "use intrinsics for java.util.zip.CRC32")                         \
 742                                                                             \
 743   develop(bool, TraceCallFixup, false,                                      \
 744           "Trace all call fixups")                                          \
 745                                                                             \
 746   develop(bool, DeoptimizeALot, false,                                      \
 747           "Deoptimize at every exit from the runtime system")               \
 748                                                                             \
 749   notproduct(ccstrlist, DeoptimizeOnlyAt, "",                               \
 750           "A comma separated list of bcis to deoptimize at")                \
 751                                                                             \
 752   product(bool, DeoptimizeRandom, false,                                    \
 753           "Deoptimize random frames on random exit from the runtime system")\
 754                                                                             \
 755   notproduct(bool, ZombieALot, false,                                       \
 756           "Create zombies (non-entrant) at exit from the runtime system")   \
 757                                                                             \
 758   product(bool, UnlinkSymbolsALot, false,                                   \
 759           "Unlink unreferenced symbols from the symbol table at safepoints")\
 760                                                                             \
 761   notproduct(bool, WalkStackALot, false,                                    \
 762           "Trace stack (no print) at every exit from the runtime system")   \
 763                                                                             \
 764   product(bool, Debugging, false,                                           \
 765           "Set when executing debug methods in debug.cpp "                  \
 766           "(to prevent triggering assertions)")                             \
 767                                                                             \
 768   notproduct(bool, StrictSafepointChecks, trueInDebug,                      \
 769           "Enable strict checks that safepoints cannot happen for threads " \
 770           "that use No_Safepoint_Verifier")                                 \
 771                                                                             \
 772   notproduct(bool, VerifyLastFrame, false,                                  \
 773           "Verify oops on last frame on entry to VM")                       \
 774                                                                             \
 775   develop(bool, TraceHandleAllocation, false,                               \
 776           "Print out warnings when suspiciously many handles are allocated")\
 777                                                                             \
 778   product(bool, UseCompilerSafepoints, true,                                \
 779           "Stop at safepoints in compiled code")                            \
 780                                                                             \
 781   product(bool, FailOverToOldVerifier, true,                                \
 782           "Fail over to old verifier when split verifier fails")            \
 783                                                                             \
 784   develop(bool, ShowSafepointMsgs, false,                                   \
 785           "Show message about safepoint synchronization")                   \
 786                                                                             \
 787   product(bool, SafepointTimeout, false,                                    \
 788           "Time out and warn or fail after SafepointTimeoutDelay "          \
 789           "milliseconds if failed to reach safepoint")                      \
 790                                                                             \
 791   develop(bool, DieOnSafepointTimeout, false,                               \
 792           "Die upon failure to reach safepoint (see SafepointTimeout)")     \
 793                                                                             \
 794   /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */      \
 795   /* typically, at most a few retries are needed */                         \
 796   product(intx, SuspendRetryCount, 50,                                      \
 797           "Maximum retry count for an external suspend request")            \
 798                                                                             \
 799   product(intx, SuspendRetryDelay, 5,                                       \
 800           "Milliseconds to delay per retry (* current_retry_count)")        \
 801                                                                             \
 802   product(bool, AssertOnSuspendWaitFailure, false,                          \
 803           "Assert/Guarantee on external suspend wait failure")              \
 804                                                                             \
 805   product(bool, TraceSuspendWaitFailures, false,                            \
 806           "Trace external suspend wait failures")                           \
 807                                                                             \
 808   product(bool, MaxFDLimit, true,                                           \
 809           "Bump the number of file descriptors to maximum in Solaris")      \
 810                                                                             \
 811   diagnostic(bool, LogEvents, true,                                         \
 812           "Enable the various ring buffer event logs")                      \
 813                                                                             \
 814   diagnostic(uintx, LogEventsBufferEntries, 10,                             \
 815           "Number of ring buffer event logs")                               \
 816                                                                             \
 817   product(bool, BytecodeVerificationRemote, true,                           \
 818           "Enable the Java bytecode verifier for remote classes")           \
 819                                                                             \
 820   product(bool, BytecodeVerificationLocal, false,                           \
 821           "Enable the Java bytecode verifier for local classes")            \
 822                                                                             \
 823   develop(bool, ForceFloatExceptions, trueInDebug,                          \
 824           "Force exceptions on FP stack under/overflow")                    \
 825                                                                             \
 826   develop(bool, VerifyStackAtCalls, false,                                  \
 827           "Verify that the stack pointer is unchanged after calls")         \
 828                                                                             \
 829   develop(bool, TraceJavaAssertions, false,                                 \
 830           "Trace java language assertions")                                 \
 831                                                                             \
 832   notproduct(bool, CheckAssertionStatusDirectives, false,                   \
 833           "Temporary - see javaClasses.cpp")                                \
 834                                                                             \
 835   notproduct(bool, PrintMallocFree, false,                                  \
 836           "Trace calls to C heap malloc/free allocation")                   \
 837                                                                             \
 838   product(bool, PrintOopAddress, false,                                     \
 839           "Always print the location of the oop")                           \
 840                                                                             \
 841   notproduct(bool, VerifyCodeCache, false,                                  \
 842           "Verify code cache on memory allocation/deallocation")            \
 843                                                                             \
 844   develop(bool, ZapDeadCompiledLocals, false,                               \
 845           "Zap dead locals in compiler frames")                             \
 846                                                                             \
 847   notproduct(bool, ZapDeadLocalsOld, false,                                 \
 848           "Zap dead locals (old version, zaps all frames when "             \
 849           "entering the VM")                                                \
 850                                                                             \
 851   notproduct(bool, CheckOopishValues, false,                                \
 852           "Warn if value contains oop (requires ZapDeadLocals)")            \
 853                                                                             \
 854   develop(bool, UseMallocOnly, false,                                       \
 855           "Use only malloc/free for allocation (no resource area/arena)")   \
 856                                                                             \
 857   develop(bool, PrintMalloc, false,                                         \
 858           "Print all malloc/free calls")                                    \
 859                                                                             \
 860   develop(bool, PrintMallocStatistics, false,                               \
 861           "Print malloc/free statistics")                                   \
 862                                                                             \
 863   develop(bool, ZapResourceArea, trueInDebug,                               \
 864           "Zap freed resource/arena space with 0xABABABAB")                 \
 865                                                                             \
 866   notproduct(bool, ZapVMHandleArea, trueInDebug,                            \
 867           "Zap freed VM handle space with 0xBCBCBCBC")                      \
 868                                                                             \
 869   develop(bool, ZapJNIHandleArea, trueInDebug,                              \
 870           "Zap freed JNI handle space with 0xFEFEFEFE")                     \
 871                                                                             \
 872   notproduct(bool, ZapStackSegments, trueInDebug,                           \
 873           "Zap allocated/freed stack segments with 0xFADFADED")             \
 874                                                                             \
 875   develop(bool, ZapUnusedHeapArea, trueInDebug,                             \
 876           "Zap unused heap space with 0xBAADBABE")                          \
 877                                                                             \
 878   develop(bool, TraceZapUnusedHeapArea, false,                              \
 879           "Trace zapping of unused heap space")                             \
 880                                                                             \
 881   develop(bool, CheckZapUnusedHeapArea, false,                              \
 882           "Check zapping of unused heap space")                             \
 883                                                                             \
 884   develop(bool, ZapFillerObjects, trueInDebug,                              \
 885           "Zap filler objects with 0xDEAFBABE")                             \
 886                                                                             \
 887   develop(bool, PrintVMMessages, true,                                      \
 888           "Print VM messages on console")                                   \
 889                                                                             \
 890   product(bool, PrintGCApplicationConcurrentTime, false,                    \
 891           "Print the time the application has been running")                \
 892                                                                             \
 893   product(bool, PrintGCApplicationStoppedTime, false,                       \
 894           "Print the time the application has been stopped")                \
 895                                                                             \
 896   diagnostic(bool, VerboseVerification, false,                              \
 897           "Display detailed verification details")                          \
 898                                                                             \
 899   notproduct(uintx, ErrorHandlerTest, 0,                                    \
 900           "If > 0, provokes an error after VM initialization; the value "   \
 901           "determines which error to provoke. See test_error_handler() "    \
 902           "in debug.cpp.")                                                  \
 903                                                                             \
 904   develop(bool, Verbose, false,                                             \
 905           "Print additional debugging information from other modes")        \
 906                                                                             \
 907   develop(bool, PrintMiscellaneous, false,                                  \
 908           "Print uncategorized debugging information (requires +Verbose)")  \
 909                                                                             \
 910   develop(bool, WizardMode, false,                                          \
 911           "Print much more debugging information")                          \
 912                                                                             \
 913   product(bool, ShowMessageBoxOnError, false,                               \
 914           "Keep process alive on VM fatal error")                           \
 915                                                                             \
 916   product(bool, CreateMinidumpOnCrash, false,                               \
 917           "Create minidump on VM fatal error")                              \
 918                                                                             \
 919   product_pd(bool, UseOSErrorReporting,                                     \
 920           "Let VM fatal error propagate to the OS (ie. WER on Windows)")    \
 921                                                                             \
 922   product(bool, SuppressFatalErrorMessage, false,                           \
 923           "Report NO fatal error message (avoid deadlock)")                 \
 924                                                                             \
 925   product(ccstrlist, OnError, "",                                           \
 926           "Run user-defined commands on fatal error; see VMError.cpp "      \
 927           "for examples")                                                   \
 928                                                                             \
 929   product(ccstrlist, OnOutOfMemoryError, "",                                \
 930           "Run user-defined commands on first java.lang.OutOfMemoryError")  \
 931                                                                             \
 932   manageable(bool, HeapDumpBeforeFullGC, false,                             \
 933           "Dump heap to file before any major stop-the-world GC")           \
 934                                                                             \
 935   manageable(bool, HeapDumpAfterFullGC, false,                              \
 936           "Dump heap to file after any major stop-the-world GC")            \
 937                                                                             \
 938   manageable(bool, HeapDumpOnOutOfMemoryError, false,                       \
 939           "Dump heap to file when java.lang.OutOfMemoryError is thrown")    \
 940                                                                             \
 941   manageable(ccstr, HeapDumpPath, NULL,                                     \
 942           "When HeapDumpOnOutOfMemoryError is on, the path (filename or "   \
 943           "directory) of the dump file (defaults to java_pid<pid>.hprof "   \
 944           "in the working directory)")                                      \
 945                                                                             \
 946   develop(uintx, SegmentedHeapDumpThreshold, 2*G,                           \
 947           "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) "     \
 948           "when the heap usage is larger than this")                        \
 949                                                                             \
 950   develop(uintx, HeapDumpSegmentSize, 1*G,                                  \
 951           "Approximate segment size when generating a segmented heap dump") \
 952                                                                             \
 953   develop(bool, BreakAtWarning, false,                                      \
 954           "Execute breakpoint upon encountering VM warning")                \
 955                                                                             \
 956   develop(bool, TraceVMOperation, false,                                    \
 957           "Trace VM operations")                                            \
 958                                                                             \
 959   develop(bool, UseFakeTimers, false,                                       \
 960           "Tell whether the VM should use system time or a fake timer")     \
 961                                                                             \
 962   product(ccstr, NativeMemoryTracking, "off",                               \
 963           "Native memory tracking options")                                 \
 964                                                                             \
 965   diagnostic(bool, PrintNMTStatistics, false,                               \
 966           "Print native memory tracking summary data if it is on")          \
 967                                                                             \
 968   diagnostic(bool, LogCompilation, false,                                   \
 969           "Log compilation activity in detail to LogFile")                  \
 970                                                                             \
 971   product(bool, PrintCompilation, false,                                    \
 972           "Print compilations")                                             \
 973                                                                             \
 974   diagnostic(bool, TraceNMethodInstalls, false,                             \
 975           "Trace nmethod installation")                                     \
 976                                                                             \
 977   diagnostic(intx, ScavengeRootsInCode, 2,                                  \
 978           "0: do not allow scavengable oops in the code cache; "            \
 979           "1: allow scavenging from the code cache; "                       \
 980           "2: emit as many constants as the compiler can see")              \
 981                                                                             \
 982   product(bool, AlwaysRestoreFPU, false,                                    \
 983           "Restore the FPU control word after every JNI call (expensive)")  \
 984                                                                             \
 985   diagnostic(bool, PrintCompilation2, false,                                \
 986           "Print additional statistics per compilation")                    \
 987                                                                             \
 988   diagnostic(bool, PrintAdapterHandlers, false,                             \
 989           "Print code generated for i2c/c2i adapters")                      \
 990                                                                             \
 991   diagnostic(bool, VerifyAdapterCalls, trueInDebug,                         \
 992           "Verify that i2c/c2i adapters are called properly")               \
 993                                                                             \
 994   develop(bool, VerifyAdapterSharing, false,                                \
 995           "Verify that the code for shared adapters is the equivalent")     \
 996                                                                             \
 997   diagnostic(bool, PrintAssembly, false,                                    \
 998           "Print assembly code (using external disassembler.so)")           \
 999                                                                             \
1000   diagnostic(ccstr, PrintAssemblyOptions, NULL,                             \
1001           "Print options string passed to disassembler.so")                 \
1002                                                                             \
1003   diagnostic(bool, PrintNMethods, false,                                    \
1004           "Print assembly code for nmethods when generated")                \
1005                                                                             \
1006   diagnostic(bool, PrintNativeNMethods, false,                              \
1007           "Print assembly code for native nmethods when generated")         \
1008                                                                             \
1009   develop(bool, PrintDebugInfo, false,                                      \
1010           "Print debug information for all nmethods when generated")        \
1011                                                                             \
1012   develop(bool, PrintRelocations, false,                                    \
1013           "Print relocation information for all nmethods when generated")   \
1014                                                                             \
1015   develop(bool, PrintDependencies, false,                                   \
1016           "Print dependency information for all nmethods when generated")   \
1017                                                                             \
1018   develop(bool, PrintExceptionHandlers, false,                              \
1019           "Print exception handler tables for all nmethods when generated") \
1020                                                                             \
1021   develop(bool, StressCompiledExceptionHandlers, false,                     \
1022           "Exercise compiled exception handlers")                           \
1023                                                                             \
1024   develop(bool, InterceptOSException, false,                                \
1025           "Start debugger when an implicit OS (e.g. NULL) "                 \
1026           "exception happens")                                              \
1027                                                                             \
1028   product(bool, PrintCodeCache, false,                                      \
1029           "Print the code cache memory usage when exiting")                 \
1030                                                                             \
1031   develop(bool, PrintCodeCache2, false,                                     \
1032           "Print detailed usage information on the code cache when exiting")\
1033                                                                             \
1034   product(bool, PrintCodeCacheOnCompilation, false,                         \
1035           "Print the code cache memory usage each time a method is "        \
1036           "compiled")                                                       \
1037                                                                             \
1038   diagnostic(bool, PrintStubCode, false,                                    \
1039           "Print generated stub code")                                      \
1040                                                                             \
1041   product(bool, StackTraceInThrowable, true,                                \
1042           "Collect backtrace in throwable when exception happens")          \
1043                                                                             \
1044   product(bool, OmitStackTraceInFastThrow, true,                            \
1045           "Omit backtraces for some 'hot' exceptions in optimized code")    \
1046                                                                             \
1047   product(bool, ProfilerPrintByteCodeStatistics, false,                     \
1048           "Print bytecode statistics when dumping profiler output")         \
1049                                                                             \
1050   product(bool, ProfilerRecordPC, false,                                    \
1051           "Collect ticks for each 16 byte interval of compiled code")       \
1052                                                                             \
1053   product(bool, ProfileVM, false,                                           \
1054           "Profile ticks that fall within VM (either in the VM Thread "     \
1055           "or VM code called through stubs)")                               \
1056                                                                             \
1057   product(bool, ProfileIntervals, false,                                    \
1058           "Print profiles for each interval (see ProfileIntervalsTicks)")   \
1059                                                                             \
1060   notproduct(bool, ProfilerCheckIntervals, false,                           \
1061           "Collect and print information on spacing of profiler ticks")     \
1062                                                                             \
1063   develop(bool, PrintJVMWarnings, false,                                    \
1064           "Print warnings for unimplemented JVM functions")                 \
1065                                                                             \
1066   product(bool, PrintWarnings, true,                                        \
1067           "Print JVM warnings to output stream")                            \
1068                                                                             \
1069   notproduct(uintx, WarnOnStalledSpinLock, 0,                               \
1070           "Print warnings for stalled SpinLocks")                           \
1071                                                                             \
1072   product(bool, RegisterFinalizersAtInit, true,                             \
1073           "Register finalizable objects at end of Object.<init> or "        \
1074           "after allocation")                                               \
1075                                                                             \
1076   develop(bool, RegisterReferences, true,                                   \
1077           "Tell whether the VM should register soft/weak/final/phantom "    \
1078           "references")                                                     \
1079                                                                             \
1080   develop(bool, IgnoreRewrites, false,                                      \
1081           "Suppress rewrites of bytecodes in the oopmap generator. "        \
1082           "This is unsafe!")                                                \
1083                                                                             \
1084   develop(bool, PrintCodeCacheExtension, false,                             \
1085           "Print extension of code cache")                                  \
1086                                                                             \
1087   develop(bool, UsePrivilegedStack, true,                                   \
1088           "Enable the security JVM functions")                              \
1089                                                                             \
1090   develop(bool, ProtectionDomainVerification, true,                         \
1091           "Verify protection domain before resolution in system dictionary")\
1092                                                                             \
1093   product(bool, ClassUnloading, true,                                       \
1094           "Do unloading of classes")                                        \
1095                                                                             \
1096   product(bool, ClassUnloadingWithConcurrentMark, true,                     \
1097           "Do unloading of classes with a concurrent marking cycle")        \
1098                                                                             \
1099   develop(bool, DisableStartThread, false,                                  \
1100           "Disable starting of additional Java threads "                    \
1101           "(for debugging only)")                                           \
1102                                                                             \
1103   develop(bool, MemProfiling, false,                                        \
1104           "Write memory usage profiling to log file")                       \
1105                                                                             \
1106   notproduct(bool, PrintSystemDictionaryAtExit, false,                      \
1107           "Print the system dictionary at exit")                            \
1108                                                                             \
1109   experimental(intx, PredictedLoadedClassCount, 0,                          \
1110           "Experimental: Tune loaded class cache starting size")            \
1111                                                                             \
1112   diagnostic(bool, UnsyncloadClass, false,                                  \
1113           "Unstable: VM calls loadClass unsynchronized. Custom "            \
1114           "class loader must call VM synchronized for findClass "           \
1115           "and defineClass.")                                               \
1116                                                                             \
1117   product(bool, AlwaysLockClassLoader, false,                               \
1118           "Require the VM to acquire the class loader lock before calling " \
1119           "loadClass() even for class loaders registering "                 \
1120           "as parallel capable")                                            \
1121                                                                             \
1122   product(bool, AllowParallelDefineClass, false,                            \
1123           "Allow parallel defineClass requests for class loaders "          \
1124           "registering as parallel capable")                                \
1125                                                                             \
1126   product(bool, MustCallLoadClassInternal, false,                           \
1127           "Call loadClassInternal() rather than loadClass()")               \
1128                                                                             \
1129   product_pd(bool, DontYieldALot,                                           \
1130           "Throw away obvious excess yield calls")                          \
1131                                                                             \
1132   product_pd(bool, ConvertSleepToYield,                                     \
1133           "Convert sleep(0) to thread yield "                               \
1134           "(may be off for Solaris to improve GUI)")                        \
1135                                                                             \
1136   product(bool, ConvertYieldToSleep, false,                                 \
1137           "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1138           "behavior")                                                       \
1139                                                                             \
1140   product(bool, UseBoundThreads, true,                                      \
1141           "Bind user level threads to kernel threads (for Solaris only)")   \
1142                                                                             \
1143   develop(bool, UseDetachedThreads, true,                                   \
1144           "Use detached threads that are recycled upon termination "        \
1145           "(for Solaris only)")                                             \
1146                                                                             \
1147   product(bool, UseLWPSynchronization, true,                                \
1148           "Use LWP-based instead of libthread-based synchronization "       \
1149           "(SPARC only)")                                                   \
1150                                                                             \
1151   experimental(ccstr, SyncKnobs, NULL,                                      \
1152                "(Unstable) Various monitor synchronization tunables")       \
1153                                                                             \
1154   experimental(intx, EmitSync, 0,                                           \
1155                "(Unsafe, Unstable) "                                        \
1156                "Control emission of inline sync fast-path code")            \
1157                                                                             \
1158   product(intx, MonitorBound, 0, "Bound Monitor population")                \
1159                                                                             \
1160   product(bool, MonitorInUseLists, false, "Track Monitors for Deflation")   \
1161                                                                             \
1162   experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) "                    \
1163                "Experimental Sync flags")                                   \
1164                                                                             \
1165   experimental(intx, SyncVerbose, 0, "(Unstable)")                          \
1166                                                                             \
1167   experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)")               \
1168                                                                             \
1169   experimental(intx, hashCode, 5,                                           \
1170                "(Unstable) select hashCode generation algorithm")           \
1171                                                                             \
1172   experimental(intx, WorkAroundNPTLTimedWaitHang, 1,                        \
1173                "(Unstable, Linux-specific) "                                \
1174                "avoid NPTL-FUTEX hang pthread_cond_timedwait")              \
1175                                                                             \
1176   product(bool, FilterSpuriousWakeups, true,                                \
1177           "When true prevents OS-level spurious, or premature, wakeups "    \
1178           "from Object.wait (Ignored for Windows)")                         \
1179                                                                             \
1180   product(intx, NativeMonitorTimeout, -1, "(Unstable)")                     \
1181                                                                             \
1182   product(intx, NativeMonitorFlags, 0, "(Unstable)")                        \
1183                                                                             \
1184   product(intx, NativeMonitorSpinLimit, 20, "(Unstable)")                   \
1185                                                                             \
1186   develop(bool, UsePthreads, false,                                         \
1187           "Use pthread-based instead of libthread-based synchronization "   \
1188           "(SPARC only)")                                                   \
1189                                                                             \
1190   product(bool, AdjustConcurrency, false,                                   \
1191           "Call thr_setconcurrency at thread creation time to avoid "       \
1192           "LWP starvation on MP systems (for Solaris Only)")                \
1193                                                                             \
1194   product(bool, ReduceSignalUsage, false,                                   \
1195           "Reduce the use of OS signals in Java and/or the VM")             \
1196                                                                             \
1197   develop_pd(bool, ShareVtableStubs,                                        \
1198           "Share vtable stubs (smaller code but worse branch prediction")   \
1199                                                                             \
1200   develop(bool, LoadLineNumberTables, true,                                 \
1201           "Tell whether the class file parser loads line number tables")    \
1202                                                                             \
1203   develop(bool, LoadLocalVariableTables, true,                              \
1204           "Tell whether the class file parser loads local variable tables") \
1205                                                                             \
1206   develop(bool, LoadLocalVariableTypeTables, true,                          \
1207           "Tell whether the class file parser loads local variable type"    \
1208           "tables")                                                         \
1209                                                                             \
1210   product(bool, AllowUserSignalHandlers, false,                             \
1211           "Do not complain if the application installs signal handlers "    \
1212           "(Solaris & Linux only)")                                         \
1213                                                                             \
1214   product(bool, UseSignalChaining, true,                                    \
1215           "Use signal-chaining to invoke signal handlers installed "        \
1216           "by the application (Solaris & Linux only)")                      \
1217                                                                             \
1218   product(bool, UseAltSigs, false,                                          \
1219           "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM "      \
1220           "internal signals (Solaris only)")                                \
1221                                                                             \
1222   product(bool, AllowJNIEnvProxy, false,                                    \
1223           "Allow JNIEnv proxies for jdbx")                                  \
1224                                                                             \
1225   product(bool, JNIDetachReleasesMonitors, true,                            \
1226           "JNI DetachCurrentThread releases monitors owned by thread")      \
1227                                                                             \
1228   product(bool, RestoreMXCSROnJNICalls, false,                              \
1229           "Restore MXCSR when returning from JNI calls")                    \
1230                                                                             \
1231   product(bool, CheckJNICalls, false,                                       \
1232           "Verify all arguments to JNI calls")                              \
1233                                                                             \
1234   product(bool, UseFastJNIAccessors, true,                                  \
1235           "Use optimized versions of Get<Primitive>Field")                  \
1236                                                                             \
1237   product(intx, MaxJNILocalCapacity, 65536,                                 \
1238           "Maximum allowable local JNI handle capacity to "                 \
1239           "EnsureLocalCapacity() and PushLocalFrame(), "                    \
1240           "where <= 0 is unlimited, default: 65536")                        \
1241                                                                             \
1242   product(bool, EagerXrunInit, false,                                       \
1243           "Eagerly initialize -Xrun libraries; allows startup profiling, "  \
1244           "but not all -Xrun libraries may support the state of the VM "    \
1245           "at this time")                                                   \
1246                                                                             \
1247   product(bool, PreserveAllAnnotations, false,                              \
1248           "Preserve RuntimeInvisibleAnnotations as well "                   \
1249           "as RuntimeVisibleAnnotations")                                   \
1250                                                                             \
1251   develop(uintx, PreallocatedOutOfMemoryErrorCount, 4,                      \
1252           "Number of OutOfMemoryErrors preallocated with backtrace")        \
1253                                                                             \
1254   product(bool, LazyBootClassLoader, true,                                  \
1255           "Enable/disable lazy opening of boot class path entries")         \
1256                                                                             \
1257   product(bool, UseXMMForArrayCopy, false,                                  \
1258           "Use SSE2 MOVQ instruction for Arraycopy")                        \
1259                                                                             \
1260   product(intx, FieldsAllocationStyle, 1,                                   \
1261           "0 - type based with oops first, 1 - with oops last, "            \
1262           "2 - oops in super and sub classes are together")                 \
1263                                                                             \
1264   product(bool, CompactFields, true,                                        \
1265           "Allocate nonstatic fields in gaps between previous fields")      \
1266                                                                             \
1267   notproduct(bool, PrintFieldLayout, false,                                 \
1268           "Print field layout for each class")                              \
1269                                                                             \
1270   product(intx, ContendedPaddingWidth, 128,                                 \
1271           "How many bytes to pad the fields/classes marked @Contended with")\
1272                                                                             \
1273   product(bool, EnableContended, true,                                      \
1274           "Enable @Contended annotation support")                           \
1275                                                                             \
1276   product(bool, RestrictContended, true,                                    \
1277           "Restrict @Contended to trusted classes")                         \
1278                                                                             \
1279   product(bool, UseBiasedLocking, true,                                     \
1280           "Enable biased locking in JVM")                                   \
1281                                                                             \
1282   product(intx, BiasedLockingStartupDelay, 4000,                            \
1283           "Number of milliseconds to wait before enabling biased locking")  \
1284                                                                             \
1285   diagnostic(bool, PrintBiasedLockingStatistics, false,                     \
1286           "Print statistics of biased locking in JVM")                      \
1287                                                                             \
1288   product(intx, BiasedLockingBulkRebiasThreshold, 20,                       \
1289           "Threshold of number of revocations per type to try to "          \
1290           "rebias all objects in the heap of that type")                    \
1291                                                                             \
1292   product(intx, BiasedLockingBulkRevokeThreshold, 40,                       \
1293           "Threshold of number of revocations per type to permanently "     \
1294           "revoke biases of all objects in the heap of that type")          \
1295                                                                             \
1296   product(intx, BiasedLockingDecayTime, 25000,                              \
1297           "Decay time (in milliseconds) to re-enable bulk rebiasing of a "  \
1298           "type after previous bulk rebias")                                \
1299                                                                             \
1300   /* tracing */                                                             \
1301                                                                             \
1302   notproduct(bool, TraceRuntimeCalls, false,                                \
1303           "Trace run-time calls")                                           \
1304                                                                             \
1305   develop(bool, TraceJNICalls, false,                                       \
1306           "Trace JNI calls")                                                \
1307                                                                             \
1308   develop(bool, StressRewriter, false,                                      \
1309           "Stress linktime bytecode rewriting")                             \
1310                                                                             \
1311   notproduct(bool, TraceJVMCalls, false,                                    \
1312           "Trace JVM calls")                                                \
1313                                                                             \
1314   product(ccstr, TraceJVMTI, NULL,                                          \
1315           "Trace flags for JVMTI functions and events")                     \
1316                                                                             \
1317   /* This option can change an EMCP method into an obsolete method. */      \
1318   /* This can affect tests that except specific methods to be EMCP. */      \
1319   /* This option should be used with caution. */                            \
1320   product(bool, StressLdcRewrite, false,                                    \
1321           "Force ldc -> ldc_w rewrite during RedefineClasses")              \
1322                                                                             \
1323   product(intx, TraceRedefineClasses, 0,                                    \
1324           "Trace level for JVMTI RedefineClasses")                          \
1325                                                                             \
1326   develop(bool, StressMethodComparator, false,                              \
1327           "Run the MethodComparator on all loaded methods")                 \
1328                                                                             \
1329   /* change to false by default sometime after Mustang */                   \
1330   product(bool, VerifyMergedCPBytecodes, true,                              \
1331           "Verify bytecodes after RedefineClasses constant pool merging")   \
1332                                                                             \
1333   develop(bool, TraceJNIHandleAllocation, false,                            \
1334           "Trace allocation/deallocation of JNI handle blocks")             \
1335                                                                             \
1336   develop(bool, TraceThreadEvents, false,                                   \
1337           "Trace all thread events")                                        \
1338                                                                             \
1339   develop(bool, TraceBytecodes, false,                                      \
1340           "Trace bytecode execution")                                       \
1341                                                                             \
1342   develop(bool, TraceClassInitialization, false,                            \
1343           "Trace class initialization")                                     \
1344                                                                             \
1345   develop(bool, TraceExceptions, false,                                     \
1346           "Trace exceptions")                                               \
1347                                                                             \
1348   develop(bool, TraceICs, false,                                            \
1349           "Trace inline cache changes")                                     \
1350                                                                             \
1351   notproduct(bool, TraceInvocationCounterOverflow, false,                   \
1352           "Trace method invocation counter overflow")                       \
1353                                                                             \
1354   develop(bool, TraceInlineCacheClearing, false,                            \
1355           "Trace clearing of inline caches in nmethods")                    \
1356                                                                             \
1357   develop(bool, TraceDependencies, false,                                   \
1358           "Trace dependencies")                                             \
1359                                                                             \
1360   develop(bool, VerifyDependencies, trueInDebug,                            \
1361           "Exercise and verify the compilation dependency mechanism")       \
1362                                                                             \
1363   develop(bool, TraceNewOopMapGeneration, false,                            \
1364           "Trace OopMapGeneration")                                         \
1365                                                                             \
1366   develop(bool, TraceNewOopMapGenerationDetailed, false,                    \
1367           "Trace OopMapGeneration: print detailed cell states")             \
1368                                                                             \
1369   develop(bool, TimeOopMap, false,                                          \
1370           "Time calls to GenerateOopMap::compute_map() in sum")             \
1371                                                                             \
1372   develop(bool, TimeOopMap2, false,                                         \
1373           "Time calls to GenerateOopMap::compute_map() individually")       \
1374                                                                             \
1375   develop(bool, TraceMonitorMismatch, false,                                \
1376           "Trace monitor matching failures during OopMapGeneration")        \
1377                                                                             \
1378   develop(bool, TraceOopMapRewrites, false,                                 \
1379           "Trace rewriting of method oops during oop map generation")       \
1380                                                                             \
1381   develop(bool, TraceSafepoint, false,                                      \
1382           "Trace safepoint operations")                                     \
1383                                                                             \
1384   develop(bool, TraceICBuffer, false,                                       \
1385           "Trace usage of IC buffer")                                       \
1386                                                                             \
1387   develop(bool, TraceCompiledIC, false,                                     \
1388           "Trace changes of compiled IC")                                   \
1389                                                                             \
1390   notproduct(bool, TraceZapDeadLocals, false,                               \
1391           "Trace zapping dead locals")                                      \
1392                                                                             \
1393   develop(bool, TraceStartupTime, false,                                    \
1394           "Trace setup time")                                               \
1395                                                                             \
1396   develop(bool, TraceProtectionDomainVerification, false,                   \
1397           "Trace protection domain verification")                           \
1398                                                                             \
1399   develop(bool, TraceClearedExceptions, false,                              \
1400           "Print when an exception is forcibly cleared")                    \
1401                                                                             \
1402   product(bool, TraceClassResolution, false,                                \
1403           "Trace all constant pool resolutions (for debugging)")            \
1404                                                                             \
1405   product(bool, TraceBiasedLocking, false,                                  \
1406           "Trace biased locking in JVM")                                    \
1407                                                                             \
1408   product(bool, TraceMonitorInflation, false,                               \
1409           "Trace monitor inflation in JVM")                                 \
1410                                                                             \
1411   /* gc */                                                                  \
1412                                                                             \
1413   product(bool, UseSerialGC, false,                                         \
1414           "Use the Serial garbage collector")                               \
1415                                                                             \
1416   product(bool, UseG1GC, false,                                             \
1417           "Use the Garbage-First garbage collector")                        \
1418                                                                             \
1419   product(bool, UseParallelGC, false,                                       \
1420           "Use the Parallel Scavenge garbage collector")                    \
1421                                                                             \
1422   product(bool, UseParallelOldGC, false,                                    \
1423           "Use the Parallel Old garbage collector")                         \
1424                                                                             \
1425   product(uintx, HeapMaximumCompactionInterval, 20,                         \
1426           "How often should we maximally compact the heap (not allowing "   \
1427           "any dead space)")                                                \
1428                                                                             \
1429   product(uintx, HeapFirstMaximumCompactionCount, 3,                        \
1430           "The collection count for the first maximum compaction")          \
1431                                                                             \
1432   product(bool, UseMaximumCompactionOnSystemGC, true,                       \
1433           "Use maximum compaction in the Parallel Old garbage collector "   \
1434           "for a system GC")                                                \
1435                                                                             \
1436   product(uintx, ParallelOldDeadWoodLimiterMean, 50,                        \
1437           "The mean used by the parallel compact dead wood "                \
1438           "limiter (a number between 0-100)")                               \
1439                                                                             \
1440   product(uintx, ParallelOldDeadWoodLimiterStdDev, 80,                      \
1441           "The standard deviation used by the parallel compact dead wood "  \
1442           "limiter (a number between 0-100)")                               \
1443                                                                             \
1444   product(uintx, ParallelGCThreads, 0,                                      \
1445           "Number of parallel threads parallel gc will use")                \
1446                                                                             \
1447   product(bool, UseDynamicNumberOfGCThreads, false,                         \
1448           "Dynamically choose the number of parallel threads "              \
1449           "parallel gc will use")                                           \
1450                                                                             \
1451   diagnostic(bool, ForceDynamicNumberOfGCThreads, false,                    \
1452           "Force dynamic selection of the number of "                       \
1453           "parallel threads parallel gc will use to aid debugging")         \
1454                                                                             \
1455   product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M),               \
1456           "Size of heap (bytes) per GC thread used in calculating the "     \
1457           "number of GC threads")                                           \
1458                                                                             \
1459   product(bool, TraceDynamicGCThreads, false,                               \
1460           "Trace the dynamic GC thread usage")                              \
1461                                                                             \
1462   develop(bool, ParallelOldGCSplitALot, false,                              \
1463           "Provoke splitting (copying data from a young gen space to "      \
1464           "multiple destination spaces)")                                   \
1465                                                                             \
1466   develop(uintx, ParallelOldGCSplitInterval, 3,                             \
1467           "How often to provoke splitting a young gen space")               \
1468                                                                             \
1469   product(uintx, ConcGCThreads, 0,                                          \
1470           "Number of threads concurrent gc will use")                       \
1471                                                                             \
1472   product(uintx, YoungPLABSize, 4096,                                       \
1473           "Size of young gen promotion LAB's (in HeapWords)")               \
1474                                                                             \
1475   product(uintx, OldPLABSize, 1024,                                         \
1476           "Size of old gen promotion LAB's (in HeapWords)")                 \
1477                                                                             \
1478   product(uintx, GCTaskTimeStampEntries, 200,                               \
1479           "Number of time stamp entries per gc worker thread")              \
1480                                                                             \
1481   product(bool, AlwaysTenure, false,                                        \
1482           "Always tenure objects in eden (ParallelGC only)")                \
1483                                                                             \
1484   product(bool, NeverTenure, false,                                         \
1485           "Never tenure objects in eden, may tenure on overflow "           \
1486           "(ParallelGC only)")                                              \
1487                                                                             \
1488   product(bool, ScavengeBeforeFullGC, true,                                 \
1489           "Scavenge youngest generation before each full GC.")              \
1490                                                                             \
1491   develop(bool, ScavengeWithObjectsInToSpace, false,                        \
1492           "Allow scavenges to occur when to-space contains objects")        \
1493                                                                             \
1494   product(bool, UseConcMarkSweepGC, false,                                  \
1495           "Use Concurrent Mark-Sweep GC in the old generation")             \
1496                                                                             \
1497   product(bool, ExplicitGCInvokesConcurrent, false,                         \
1498           "A System.gc() request invokes a concurrent collection; "         \
1499           "(effective only when UseConcMarkSweepGC)")                       \
1500                                                                             \
1501   product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false,        \
1502           "A System.gc() request invokes a concurrent collection and "      \
1503           "also unloads classes during such a concurrent gc cycle "         \
1504           "(effective only when UseConcMarkSweepGC)")                       \
1505                                                                             \
1506   product(bool, GCLockerInvokesConcurrent, false,                           \
1507           "The exit of a JNI critical section necessitating a scavenge, "   \
1508           "also kicks off a background concurrent collection")              \
1509                                                                             \
1510   product(uintx, GCLockerEdenExpansionPercent, 5,                           \
1511           "How much the GC can expand the eden by while the GC locker "     \
1512           "is active (as a percentage)")                                    \
1513                                                                             \
1514   diagnostic(intx, GCLockerRetryAllocationCount, 2,                         \
1515           "Number of times to retry allocations when "                      \
1516           "blocked by the GC locker")                                       \
1517                                                                             \
1518   develop(bool, UseCMSAdaptiveFreeLists, true,                              \
1519           "Use adaptive free lists in the CMS generation")                  \
1520                                                                             \
1521   develop(bool, UseAsyncConcMarkSweepGC, true,                              \
1522           "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1523                                                                             \
1524   develop(bool, RotateCMSCollectionTypes, false,                            \
1525           "Rotate the CMS collections among concurrent and STW")            \
1526                                                                             \
1527   product(bool, UseCMSBestFit, true,                                        \
1528           "Use CMS best fit allocation strategy")                           \
1529                                                                             \
1530   product(bool, UseCMSCollectionPassing, true,                              \
1531           "Use passing of collection from background to foreground")        \
1532                                                                             \
1533   product(bool, UseParNewGC, false,                                         \
1534           "Use parallel threads in the new generation")                     \
1535                                                                             \
1536   product(bool, ParallelGCVerbose, false,                                   \
1537           "Verbose output for parallel gc")                                 \
1538                                                                             \
1539   product(uintx, ParallelGCBufferWastePct, 10,                              \
1540           "Wasted fraction of parallel allocation buffer")                  \
1541                                                                             \
1542   diagnostic(bool, ParallelGCRetainPLAB, false,                             \
1543           "Retain parallel allocation buffers across scavenges; "           \
1544           "it is disabled because this currently conflicts with "           \
1545           "parallel card scanning under certain conditions.")               \
1546                                                                             \
1547   product(uintx, TargetPLABWastePct, 10,                                    \
1548           "Target wasted space in last buffer as percent of overall "       \
1549           "allocation")                                                     \
1550                                                                             \
1551   product(uintx, PLABWeight, 75,                                            \
1552           "Percentage (0-100) used to weight the current sample when "      \
1553           "computing exponentially decaying average for ResizePLAB")        \
1554                                                                             \
1555   product(bool, ResizePLAB, true,                                           \
1556           "Dynamically resize (survivor space) promotion LAB's")            \
1557                                                                             \
1558   product(bool, PrintPLAB, false,                                           \
1559           "Print (survivor space) promotion LAB's sizing decisions")        \
1560                                                                             \
1561   product(intx, ParGCArrayScanChunk, 50,                                    \
1562           "Scan a subset of object array and push remainder, if array is "  \
1563           "bigger than this")                                               \
1564                                                                             \
1565   product(bool, ParGCUseLocalOverflow, false,                               \
1566           "Instead of a global overflow list, use local overflow stacks")   \
1567                                                                             \
1568   product(bool, ParGCTrimOverflow, true,                                    \
1569           "Eagerly trim the local overflow lists "                          \
1570           "(when ParGCUseLocalOverflow)")                                   \
1571                                                                             \
1572   notproduct(bool, ParGCWorkQueueOverflowALot, false,                       \
1573           "Simulate work queue overflow in ParNew")                         \
1574                                                                             \
1575   notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000,                   \
1576           "An `interval' counter that determines how frequently "           \
1577           "we simulate overflow; a smaller number increases frequency")     \
1578                                                                             \
1579   product(uintx, ParGCDesiredObjsFromOverflowList, 20,                      \
1580           "The desired number of objects to claim from the overflow list")  \
1581                                                                             \
1582   diagnostic(uintx, ParGCStridesPerThread, 2,                               \
1583           "The number of strides per worker thread that we divide up the "  \
1584           "card table scanning work into")                                  \
1585                                                                             \
1586   diagnostic(intx, ParGCCardsPerStrideChunk, 256,                           \
1587           "The number of cards in each chunk of the parallel chunks used "  \
1588           "during card table scanning")                                     \
1589                                                                             \
1590   product(uintx, CMSParPromoteBlocksToClaim, 16,                            \
1591           "Number of blocks to attempt to claim when refilling CMS LAB's "  \
1592           "for parallel GC")                                                \
1593                                                                             \
1594   product(uintx, OldPLABWeight, 50,                                         \
1595           "Percentage (0-100) used to weight the current sample when "      \
1596           "computing exponentially decaying average for resizing "          \
1597           "CMSParPromoteBlocksToClaim")                                     \
1598                                                                             \
1599   product(bool, ResizeOldPLAB, true,                                        \
1600           "Dynamically resize (old gen) promotion LAB's")                   \
1601                                                                             \
1602   product(bool, PrintOldPLAB, false,                                        \
1603           "Print (old gen) promotion LAB's sizing decisions")               \
1604                                                                             \
1605   product(uintx, CMSOldPLABMin, 16,                                         \
1606           "Minimum size of CMS gen promotion LAB caches per worker "        \
1607           "per block size")                                                 \
1608                                                                             \
1609   product(uintx, CMSOldPLABMax, 1024,                                       \
1610           "Maximum size of CMS gen promotion LAB caches per worker "        \
1611           "per block size")                                                 \
1612                                                                             \
1613   product(uintx, CMSOldPLABNumRefills, 4,                                   \
1614           "Nominal number of refills of CMS gen promotion LAB cache "       \
1615           "per worker per block size")                                      \
1616                                                                             \
1617   product(bool, CMSOldPLABResizeQuicker, false,                             \
1618           "React on-the-fly during a scavenge to a sudden "                 \
1619           "change in block demand rate")                                    \
1620                                                                             \
1621   product(uintx, CMSOldPLABToleranceFactor, 4,                              \
1622           "The tolerance of the phase-change detector for on-the-fly "      \
1623           "PLAB resizing during a scavenge")                                \
1624                                                                             \
1625   product(uintx, CMSOldPLABReactivityFactor, 2,                             \
1626           "The gain in the feedback loop for on-the-fly PLAB resizing "     \
1627           "during a scavenge")                                              \
1628                                                                             \
1629   product(bool, AlwaysPreTouch, false,                                      \
1630           "Force all freshly committed pages to be pre-touched")            \
1631                                                                             \
1632   product_pd(uintx, CMSYoungGenPerWorker,                                   \
1633           "The maximum size of young gen chosen by default per GC worker "  \
1634           "thread available")                                               \
1635                                                                             \
1636   product(bool, CMSIncrementalMode, false,                                  \
1637           "Whether CMS GC should operate in \"incremental\" mode")          \
1638                                                                             \
1639   product(uintx, CMSIncrementalDutyCycle, 10,                               \
1640           "Percentage (0-100) of CMS incremental mode duty cycle. If "      \
1641           "CMSIncrementalPacing is enabled, then this is just the initial " \
1642           "value.")                                                         \
1643                                                                             \
1644   product(bool, CMSIncrementalPacing, true,                                 \
1645           "Whether the CMS incremental mode duty cycle should be "          \
1646           "automatically adjusted")                                         \
1647                                                                             \
1648   product(uintx, CMSIncrementalDutyCycleMin, 0,                             \
1649           "Minimum percentage (0-100) of the CMS incremental duty cycle "   \
1650           "used when CMSIncrementalPacing is enabled")                      \
1651                                                                             \
1652   product(uintx, CMSIncrementalSafetyFactor, 10,                            \
1653           "Percentage (0-100) used to add conservatism when computing the " \
1654           "duty cycle")                                                     \
1655                                                                             \
1656   product(uintx, CMSIncrementalOffset, 0,                                   \
1657           "Percentage (0-100) by which the CMS incremental mode duty cycle "\
1658           "is shifted to the right within the period between young GCs")    \
1659                                                                             \
1660   product(uintx, CMSExpAvgFactor, 50,                                       \
1661           "Percentage (0-100) used to weight the current sample when "      \
1662           "computing exponential averages for CMS statistics")              \
1663                                                                             \
1664   product(uintx, CMS_FLSWeight, 75,                                         \
1665           "Percentage (0-100) used to weight the current sample when "      \
1666           "computing exponentially decaying averages for CMS FLS "          \
1667           "statistics")                                                     \
1668                                                                             \
1669   product(uintx, CMS_FLSPadding, 1,                                         \
1670           "The multiple of deviation from mean to use for buffering "       \
1671           "against volatility in free list demand")                         \
1672                                                                             \
1673   product(uintx, FLSCoalescePolicy, 2,                                      \
1674           "CMS: aggressiveness level for coalescing, increasing "           \
1675           "from 0 to 4")                                                    \
1676                                                                             \
1677   product(bool, FLSAlwaysCoalesceLarge, false,                              \
1678           "CMS: larger free blocks are always available for coalescing")    \
1679                                                                             \
1680   product(double, FLSLargestBlockCoalesceProximity, 0.99,                   \
1681           "CMS: the smaller the percentage the greater the coalescing "     \
1682           "force")                                                          \
1683                                                                             \
1684   product(double, CMSSmallCoalSurplusPercent, 1.05,                         \
1685           "CMS: the factor by which to inflate estimated demand of small "  \
1686           "block sizes to prevent coalescing with an adjoining block")      \
1687                                                                             \
1688   product(double, CMSLargeCoalSurplusPercent, 0.95,                         \
1689           "CMS: the factor by which to inflate estimated demand of large "  \
1690           "block sizes to prevent coalescing with an adjoining block")      \
1691                                                                             \
1692   product(double, CMSSmallSplitSurplusPercent, 1.10,                        \
1693           "CMS: the factor by which to inflate estimated demand of small "  \
1694           "block sizes to prevent splitting to supply demand for smaller "  \
1695           "blocks")                                                         \
1696                                                                             \
1697   product(double, CMSLargeSplitSurplusPercent, 1.00,                        \
1698           "CMS: the factor by which to inflate estimated demand of large "  \
1699           "block sizes to prevent splitting to supply demand for smaller "  \
1700           "blocks")                                                         \
1701                                                                             \
1702   product(bool, CMSExtrapolateSweep, false,                                 \
1703           "CMS: cushion for block demand during sweep")                     \
1704                                                                             \
1705   product(uintx, CMS_SweepWeight, 75,                                       \
1706           "Percentage (0-100) used to weight the current sample when "      \
1707           "computing exponentially decaying average for inter-sweep "       \
1708           "duration")                                                       \
1709                                                                             \
1710   product(uintx, CMS_SweepPadding, 1,                                       \
1711           "The multiple of deviation from mean to use for buffering "       \
1712           "against volatility in inter-sweep duration")                     \
1713                                                                             \
1714   product(uintx, CMS_SweepTimerThresholdMillis, 10,                         \
1715           "Skip block flux-rate sampling for an epoch unless inter-sweep "  \
1716           "duration exceeds this threshold in milliseconds")                \
1717                                                                             \
1718   develop(bool, CMSTraceIncrementalMode, false,                             \
1719           "Trace CMS incremental mode")                                     \
1720                                                                             \
1721   develop(bool, CMSTraceIncrementalPacing, false,                           \
1722           "Trace CMS incremental mode pacing computation")                  \
1723                                                                             \
1724   develop(bool, CMSTraceThreadState, false,                                 \
1725           "Trace the CMS thread state (enable the trace_state() method)")   \
1726                                                                             \
1727   product(bool, CMSClassUnloadingEnabled, true,                             \
1728           "Whether class unloading enabled when using CMS GC")              \
1729                                                                             \
1730   product(uintx, CMSClassUnloadingMaxInterval, 0,                           \
1731           "When CMS class unloading is enabled, the maximum CMS cycle "     \
1732           "count for which classes may not be unloaded")                    \
1733                                                                             \
1734   product(bool, CMSCompactWhenClearAllSoftRefs, true,                       \
1735           "Compact when asked to collect CMS gen with "                     \
1736           "clear_all_soft_refs()")                                          \
1737                                                                             \
1738   product(bool, UseCMSCompactAtFullCollection, true,                        \
1739           "Use Mark-Sweep-Compact algorithm at full collections")           \
1740                                                                             \
1741   product(uintx, CMSFullGCsBeforeCompaction, 0,                             \
1742           "Number of CMS full collection done before compaction if > 0")    \
1743                                                                             \
1744   develop(intx, CMSDictionaryChoice, 0,                                     \
1745           "Use BinaryTreeDictionary as default in the CMS generation")      \
1746                                                                             \
1747   product(uintx, CMSIndexedFreeListReplenish, 4,                            \
1748           "Replenish an indexed free list with this number of chunks")      \
1749                                                                             \
1750   product(bool, CMSReplenishIntermediate, true,                             \
1751           "Replenish all intermediate free-list caches")                    \
1752                                                                             \
1753   product(bool, CMSSplitIndexedFreeListBlocks, true,                        \
1754           "When satisfying batched demand, split blocks from the "          \
1755           "IndexedFreeList whose size is a multiple of requested size")     \
1756                                                                             \
1757   product(bool, CMSLoopWarn, false,                                         \
1758           "Warn in case of excessive CMS looping")                          \
1759                                                                             \
1760   develop(bool, CMSOverflowEarlyRestoration, false,                         \
1761           "Restore preserved marks early")                                  \
1762                                                                             \
1763   product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M),              \
1764           "Size of marking stack")                                          \
1765                                                                             \
1766   product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M),          \
1767           "Maximum size of marking stack")                                  \
1768                                                                             \
1769   notproduct(bool, CMSMarkStackOverflowALot, false,                         \
1770           "Simulate frequent marking stack / work queue overflow")          \
1771                                                                             \
1772   notproduct(uintx, CMSMarkStackOverflowInterval, 1000,                     \
1773           "An \"interval\" counter that determines how frequently "         \
1774           "to simulate overflow; a smaller number increases frequency")     \
1775                                                                             \
1776   product(uintx, CMSMaxAbortablePrecleanLoops, 0,                           \
1777           "Maximum number of abortable preclean iterations, if > 0")        \
1778                                                                             \
1779   product(intx, CMSMaxAbortablePrecleanTime, 5000,                          \
1780           "Maximum time in abortable preclean (in milliseconds)")           \
1781                                                                             \
1782   product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100,              \
1783           "Nominal minimum work per abortable preclean iteration")          \
1784                                                                             \
1785   manageable(intx, CMSAbortablePrecleanWaitMillis, 100,                     \
1786           "Time that we sleep between iterations when not given "           \
1787           "enough work per iteration")                                      \
1788                                                                             \
1789   product(uintx, CMSRescanMultiple, 32,                                     \
1790           "Size (in cards) of CMS parallel rescan task")                    \
1791                                                                             \
1792   product(uintx, CMSConcMarkMultiple, 32,                                   \
1793           "Size (in cards) of CMS concurrent MT marking task")              \
1794                                                                             \
1795   product(bool, CMSAbortSemantics, false,                                   \
1796           "Whether abort-on-overflow semantics is implemented")             \
1797                                                                             \
1798   product(bool, CMSParallelInitialMarkEnabled, true,                        \
1799           "Use the parallel initial mark.")                                 \
1800                                                                             \
1801   product(bool, CMSParallelRemarkEnabled, true,                             \
1802           "Whether parallel remark enabled (only if ParNewGC)")             \
1803                                                                             \
1804   product(bool, CMSParallelSurvivorRemarkEnabled, true,                     \
1805           "Whether parallel remark of survivor space "                      \
1806           "enabled (effective only if CMSParallelRemarkEnabled)")           \
1807                                                                             \
1808   product(bool, CMSPLABRecordAlways, true,                                  \
1809           "Always record survivor space PLAB boundaries (effective only "   \
1810           "if CMSParallelSurvivorRemarkEnabled)")                           \
1811                                                                             \
1812   product(bool, CMSEdenChunksRecordAlways, true,                            \
1813           "Always record eden chunks used for the parallel initial mark "   \
1814           "or remark of eden")                                              \
1815                                                                             \
1816   product(bool, CMSPrintEdenSurvivorChunks, false,                          \
1817           "Print the eden and the survivor chunks used for the parallel "   \
1818           "initial mark or remark of the eden/survivor spaces")             \
1819                                                                             \
1820   product(bool, CMSConcurrentMTEnabled, true,                               \
1821           "Whether multi-threaded concurrent work enabled "                 \
1822           "(effective only if ParNewGC)")                                   \
1823                                                                             \
1824   product(bool, CMSPrecleaningEnabled, true,                                \
1825           "Whether concurrent precleaning enabled")                         \
1826                                                                             \
1827   product(uintx, CMSPrecleanIter, 3,                                        \
1828           "Maximum number of precleaning iteration passes")                 \
1829                                                                             \
1830   product(uintx, CMSPrecleanNumerator, 2,                                   \
1831           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1832           "ratio")                                                          \
1833                                                                             \
1834   product(uintx, CMSPrecleanDenominator, 3,                                 \
1835           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1836           "ratio")                                                          \
1837                                                                             \
1838   product(bool, CMSPrecleanRefLists1, true,                                 \
1839           "Preclean ref lists during (initial) preclean phase")             \
1840                                                                             \
1841   product(bool, CMSPrecleanRefLists2, false,                                \
1842           "Preclean ref lists during abortable preclean phase")             \
1843                                                                             \
1844   product(bool, CMSPrecleanSurvivors1, false,                               \
1845           "Preclean survivors during (initial) preclean phase")             \
1846                                                                             \
1847   product(bool, CMSPrecleanSurvivors2, true,                                \
1848           "Preclean survivors during abortable preclean phase")             \
1849                                                                             \
1850   product(uintx, CMSPrecleanThreshold, 1000,                                \
1851           "Do not iterate again if number of dirty cards is less than this")\
1852                                                                             \
1853   product(bool, CMSCleanOnEnter, true,                                      \
1854           "Clean-on-enter optimization for reducing number of dirty cards") \
1855                                                                             \
1856   product(uintx, CMSRemarkVerifyVariant, 1,                                 \
1857           "Choose variant (1,2) of verification following remark")          \
1858                                                                             \
1859   product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M,                   \
1860           "If Eden size is below this, do not try to schedule remark")      \
1861                                                                             \
1862   product(uintx, CMSScheduleRemarkEdenPenetration, 50,                      \
1863           "The Eden occupancy percentage (0-100) at which "                 \
1864           "to try and schedule remark pause")                               \
1865                                                                             \
1866   product(uintx, CMSScheduleRemarkSamplingRatio, 5,                         \
1867           "Start sampling eden top at least before young gen "              \
1868           "occupancy reaches 1/<ratio> of the size at which "               \
1869           "we plan to schedule remark")                                     \
1870                                                                             \
1871   product(uintx, CMSSamplingGrain, 16*K,                                    \
1872           "The minimum distance between eden samples for CMS (see above)")  \
1873                                                                             \
1874   product(bool, CMSScavengeBeforeRemark, false,                             \
1875           "Attempt scavenge before the CMS remark step")                    \
1876                                                                             \
1877   develop(bool, CMSTraceSweeper, false,                                     \
1878           "Trace some actions of the CMS sweeper")                          \
1879                                                                             \
1880   product(uintx, CMSWorkQueueDrainThreshold, 10,                            \
1881           "Don't drain below this size per parallel worker/thief")          \
1882                                                                             \
1883   manageable(intx, CMSWaitDuration, 2000,                                   \
1884           "Time in milliseconds that CMS thread waits for young GC")        \
1885                                                                             \
1886   develop(uintx, CMSCheckInterval, 1000,                                    \
1887           "Interval in milliseconds that CMS thread checks if it "          \
1888           "should start a collection cycle")                                \
1889                                                                             \
1890   product(bool, CMSYield, true,                                             \
1891           "Yield between steps of CMS")                                     \
1892                                                                             \
1893   product(uintx, CMSBitMapYieldQuantum, 10*M,                               \
1894           "Bitmap operations should process at most this many bits "        \
1895           "between yields")                                                 \
1896                                                                             \
1897   product(bool, CMSDumpAtPromotionFailure, false,                           \
1898           "Dump useful information about the state of the CMS old "         \
1899           "generation upon a promotion failure")                            \
1900                                                                             \
1901   product(bool, CMSPrintChunksInDump, false,                                \
1902           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1903           "more detailed information about the free chunks")                \
1904                                                                             \
1905   product(bool, CMSPrintObjectsInDump, false,                               \
1906           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1907           "more detailed information about the allocated objects")          \
1908                                                                             \
1909   diagnostic(bool, FLSVerifyAllHeapReferences, false,                       \
1910           "Verify that all references across the FLS boundary "             \
1911           "are to valid objects")                                           \
1912                                                                             \
1913   diagnostic(bool, FLSVerifyLists, false,                                   \
1914           "Do lots of (expensive) FreeListSpace verification")              \
1915                                                                             \
1916   diagnostic(bool, FLSVerifyIndexTable, false,                              \
1917           "Do lots of (expensive) FLS index table verification")            \
1918                                                                             \
1919   develop(bool, FLSVerifyDictionary, false,                                 \
1920           "Do lots of (expensive) FLS dictionary verification")             \
1921                                                                             \
1922   develop(bool, VerifyBlockOffsetArray, false,                              \
1923           "Do (expensive) block offset array verification")                 \
1924                                                                             \
1925   diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false,              \
1926           "Maintain _unallocated_block in BlockOffsetArray "                \
1927           "(currently applicable only to CMS collector)")                   \
1928                                                                             \
1929   develop(bool, TraceCMSState, false,                                       \
1930           "Trace the state of the CMS collection")                          \
1931                                                                             \
1932   product(intx, RefDiscoveryPolicy, 0,                                      \
1933           "Select type of reference discovery policy: "                     \
1934           "reference-based(0) or referent-based(1)")                        \
1935                                                                             \
1936   product(bool, ParallelRefProcEnabled, false,                              \
1937           "Enable parallel reference processing whenever possible")         \
1938                                                                             \
1939   product(bool, ParallelRefProcBalancingEnabled, true,                      \
1940           "Enable balancing of reference processing queues")                \
1941                                                                             \
1942   product(uintx, CMSTriggerRatio, 80,                                       \
1943           "Percentage of MinHeapFreeRatio in CMS generation that is "       \
1944           "allocated before a CMS collection cycle commences")              \
1945                                                                             \
1946   product(uintx, CMSBootstrapOccupancy, 50,                                 \
1947           "Percentage CMS generation occupancy at which to "                \
1948           "initiate CMS collection for bootstrapping collection stats")     \
1949                                                                             \
1950   product(intx, CMSInitiatingOccupancyFraction, -1,                         \
1951           "Percentage CMS generation occupancy to start a CMS collection "  \
1952           "cycle. A negative value means that CMSTriggerRatio is used")     \
1953                                                                             \
1954   product(uintx, InitiatingHeapOccupancyPercent, 45,                        \
1955           "Percentage of the (entire) heap occupancy to start a "           \
1956           "concurrent GC cycle. It is used by GCs that trigger a "          \
1957           "concurrent GC cycle based on the occupancy of the entire heap, " \
1958           "not just one of the generations (e.g., G1). A value of 0 "       \
1959           "denotes 'do constant GC cycles'.")                               \
1960                                                                             \
1961   manageable(intx, CMSTriggerInterval, -1,                                  \
1962           "Commence a CMS collection cycle (at least) every so many "       \
1963           "milliseconds (0 permanently, -1 disabled)")                      \
1964                                                                             \
1965   product(bool, UseCMSInitiatingOccupancyOnly, false,                       \
1966           "Only use occupancy as a criterion for starting a CMS collection")\
1967                                                                             \
1968   product(uintx, CMSIsTooFullPercentage, 98,                                \
1969           "An absolute ceiling above which CMS will always consider the "   \
1970           "unloading of classes when class unloading is enabled")           \
1971                                                                             \
1972   develop(bool, CMSTestInFreeList, false,                                   \
1973           "Check if the coalesced range is already in the "                 \
1974           "free lists as claimed")                                          \
1975                                                                             \
1976   notproduct(bool, CMSVerifyReturnedBytes, false,                           \
1977           "Check that all the garbage collected was returned to the "       \
1978           "free lists")                                                     \
1979                                                                             \
1980   notproduct(bool, ScavengeALot, false,                                     \
1981           "Force scavenge at every Nth exit from the runtime system "       \
1982           "(N=ScavengeALotInterval)")                                       \
1983                                                                             \
1984   develop(bool, FullGCALot, false,                                          \
1985           "Force full gc at every Nth exit from the runtime system "        \
1986           "(N=FullGCALotInterval)")                                         \
1987                                                                             \
1988   notproduct(bool, GCALotAtAllSafepoints, false,                            \
1989           "Enforce ScavengeALot/GCALot at all potential safepoints")        \
1990                                                                             \
1991   product(bool, PrintPromotionFailure, false,                               \
1992           "Print additional diagnostic information following "              \
1993           "promotion failure")                                              \
1994                                                                             \
1995   notproduct(bool, PromotionFailureALot, false,                             \
1996           "Use promotion failure handling on every youngest generation "    \
1997           "collection")                                                     \
1998                                                                             \
1999   develop(uintx, PromotionFailureALotCount, 1000,                           \
2000           "Number of promotion failures occurring at ParGCAllocBuffer "     \
2001           "refill attempts (ParNew) or promotion attempts "                 \
2002           "(other young collectors)")                                       \
2003                                                                             \
2004   develop(uintx, PromotionFailureALotInterval, 5,                           \
2005           "Total collections between promotion failures a lot")             \
2006                                                                             \
2007   experimental(uintx, WorkStealingSleepMillis, 1,                           \
2008           "Sleep time when sleep is used for yields")                       \
2009                                                                             \
2010   experimental(uintx, WorkStealingYieldsBeforeSleep, 5000,                  \
2011           "Number of yields before a sleep is done during work stealing")   \
2012                                                                             \
2013   experimental(uintx, WorkStealingHardSpins, 4096,                          \
2014           "Number of iterations in a spin loop between checks on "          \
2015           "time out of hard spin")                                          \
2016                                                                             \
2017   experimental(uintx, WorkStealingSpinToYieldRatio, 10,                     \
2018           "Ratio of hard spins to calls to yield")                          \
2019                                                                             \
2020   develop(uintx, ObjArrayMarkingStride, 512,                                \
2021           "Number of object array elements to push onto the marking stack " \
2022           "before pushing a continuation entry")                            \
2023                                                                             \
2024   develop(bool, MetadataAllocationFailALot, false,                          \
2025           "Fail metadata allocations at intervals controlled by "           \
2026           "MetadataAllocationFailALotInterval")                             \
2027                                                                             \
2028   develop(uintx, MetadataAllocationFailALotInterval, 1000,                  \
2029           "Metadata allocation failure a lot interval")                     \
2030                                                                             \
2031   develop(bool, TraceMetadataChunkAllocation, false,                        \
2032           "Trace chunk metadata allocations")                               \
2033                                                                             \
2034   product(bool, TraceMetadataHumongousAllocation, false,                    \
2035           "Trace humongous metadata allocations")                           \
2036                                                                             \
2037   develop(bool, TraceMetavirtualspaceAllocation, false,                     \
2038           "Trace virtual space metadata allocations")                       \
2039                                                                             \
2040   notproduct(bool, ExecuteInternalVMTests, false,                           \
2041           "Enable execution of internal VM tests")                          \
2042                                                                             \
2043   notproduct(bool, VerboseInternalVMTests, false,                           \
2044           "Turn on logging for internal VM tests.")                         \
2045                                                                             \
2046   product_pd(bool, UseTLAB, "Use thread-local object allocation")           \
2047                                                                             \
2048   product_pd(bool, ResizeTLAB,                                              \
2049           "Dynamically resize TLAB size for threads")                       \
2050                                                                             \
2051   product(bool, ZeroTLAB, false,                                            \
2052           "Zero out the newly created TLAB")                                \
2053                                                                             \
2054   product(bool, FastTLABRefill, true,                                       \
2055           "Use fast TLAB refill code")                                      \
2056                                                                             \
2057   product(bool, PrintTLAB, false,                                           \
2058           "Print various TLAB related information")                         \
2059                                                                             \
2060   product(bool, TLABStats, true,                                            \
2061           "Provide more detailed and expensive TLAB statistics "            \
2062           "(with PrintTLAB)")                                               \
2063                                                                             \
2064   EMBEDDED_ONLY(product(bool, LowMemoryProtection, true,                    \
2065           "Enable LowMemoryProtection"))                                    \
2066                                                                             \
2067   product_pd(bool, NeverActAsServerClassMachine,                            \
2068           "Never act like a server-class machine")                          \
2069                                                                             \
2070   product(bool, AlwaysActAsServerClassMachine, false,                       \
2071           "Always act like a server-class machine")                         \
2072                                                                             \
2073   product_pd(uint64_t, MaxRAM,                                              \
2074           "Real memory size (in bytes) used to set maximum heap size")      \
2075                                                                             \
2076   product(uintx, ErgoHeapSizeLimit, 0,                                      \
2077           "Maximum ergonomically set heap size (in bytes); zero means use " \
2078           "MaxRAM / MaxRAMFraction")                                        \
2079                                                                             \
2080   product(uintx, MaxRAMFraction, 4,                                         \
2081           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2082           "size")                                                           \
2083                                                                             \
2084   product(uintx, DefaultMaxRAMFraction, 4,                                  \
2085           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2086           "size; deprecated: to be renamed to MaxRAMFraction")              \
2087                                                                             \
2088   product(uintx, MinRAMFraction, 2,                                         \
2089           "Minimum fraction (1/n) of real memory used for maximum heap "    \
2090           "size on systems with small physical memory size")                \
2091                                                                             \
2092   product(uintx, InitialRAMFraction, 64,                                    \
2093           "Fraction (1/n) of real memory used for initial heap size")       \
2094                                                                             \
2095   develop(uintx, MaxVirtMemFraction, 2,                                     \
2096           "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2097           "determining maximum heap size")                                  \
2098                                                                             \
2099   product(bool, UseAutoGCSelectPolicy, false,                               \
2100           "Use automatic collection selection policy")                      \
2101                                                                             \
2102   product(uintx, AutoGCSelectPauseMillis, 5000,                             \
2103           "Automatic GC selection pause threshold in milliseconds")         \
2104                                                                             \
2105   product(bool, UseAdaptiveSizePolicy, true,                                \
2106           "Use adaptive generation sizing policies")                        \
2107                                                                             \
2108   product(bool, UsePSAdaptiveSurvivorSizePolicy, true,                      \
2109           "Use adaptive survivor sizing policies")                          \
2110                                                                             \
2111   product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true,     \
2112           "Use adaptive young-old sizing policies at minor collections")    \
2113                                                                             \
2114   product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true,     \
2115           "Use adaptive young-old sizing policies at major collections")    \
2116                                                                             \
2117   product(bool, UseAdaptiveSizePolicyWithSystemGC, false,                   \
2118           "Include statistics from System.gc() for adaptive size policy")   \
2119                                                                             \
2120   product(bool, UseAdaptiveGCBoundary, false,                               \
2121           "Allow young-old boundary to move")                               \
2122                                                                             \
2123   develop(bool, TraceAdaptiveGCBoundary, false,                             \
2124           "Trace young-old boundary moves")                                 \
2125                                                                             \
2126   develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1,             \
2127           "Resize the virtual spaces of the young or old generations")      \
2128                                                                             \
2129   product(uintx, AdaptiveSizeThroughPutPolicy, 0,                           \
2130           "Policy for changing generation size for throughput goals")       \
2131                                                                             \
2132   product(uintx, AdaptiveSizePausePolicy, 0,                                \
2133           "Policy for changing generation size for pause goals")            \
2134                                                                             \
2135   develop(bool, PSAdjustTenuredGenForMinorPause, false,                     \
2136           "Adjust tenured generation to achieve a minor pause goal")        \
2137                                                                             \
2138   develop(bool, PSAdjustYoungGenForMajorPause, false,                       \
2139           "Adjust young generation to achieve a major pause goal")          \
2140                                                                             \
2141   product(uintx, AdaptiveSizePolicyInitializingSteps, 20,                   \
2142           "Number of steps where heuristics is used before data is used")   \
2143                                                                             \
2144   develop(uintx, AdaptiveSizePolicyReadyThreshold, 5,                       \
2145           "Number of collections before the adaptive sizing is started")    \
2146                                                                             \
2147   product(uintx, AdaptiveSizePolicyOutputInterval, 0,                       \
2148           "Collection interval for printing information; zero means never") \
2149                                                                             \
2150   product(bool, UseAdaptiveSizePolicyFootprintGoal, true,                   \
2151           "Use adaptive minimum footprint as a goal")                       \
2152                                                                             \
2153   product(uintx, AdaptiveSizePolicyWeight, 10,                              \
2154           "Weight given to exponential resizing, between 0 and 100")        \
2155                                                                             \
2156   product(uintx, AdaptiveTimeWeight,       25,                              \
2157           "Weight given to time in adaptive policy, between 0 and 100")     \
2158                                                                             \
2159   product(uintx, PausePadding, 1,                                           \
2160           "How much buffer to keep for pause time")                         \
2161                                                                             \
2162   product(uintx, PromotedPadding, 3,                                        \
2163           "How much buffer to keep for promotion failure")                  \
2164                                                                             \
2165   product(uintx, SurvivorPadding, 3,                                        \
2166           "How much buffer to keep for survivor overflow")                  \
2167                                                                             \
2168   product(uintx, ThresholdTolerance, 10,                                    \
2169           "Allowed collection cost difference between generations")         \
2170                                                                             \
2171   product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50,                \
2172           "If collection costs are within margin, reduce both by full "     \
2173           "delta")                                                          \
2174                                                                             \
2175   product(uintx, YoungGenerationSizeIncrement, 20,                          \
2176           "Adaptive size percentage change in young generation")            \
2177                                                                             \
2178   product(uintx, YoungGenerationSizeSupplement, 80,                         \
2179           "Supplement to YoungedGenerationSizeIncrement used at startup")   \
2180                                                                             \
2181   product(uintx, YoungGenerationSizeSupplementDecay, 8,                     \
2182           "Decay factor to YoungedGenerationSizeSupplement")                \
2183                                                                             \
2184   product(uintx, TenuredGenerationSizeIncrement, 20,                        \
2185           "Adaptive size percentage change in tenured generation")          \
2186                                                                             \
2187   product(uintx, TenuredGenerationSizeSupplement, 80,                       \
2188           "Supplement to TenuredGenerationSizeIncrement used at startup")   \
2189                                                                             \
2190   product(uintx, TenuredGenerationSizeSupplementDecay, 2,                   \
2191           "Decay factor to TenuredGenerationSizeIncrement")                 \
2192                                                                             \
2193   product(uintx, MaxGCPauseMillis, max_uintx,                               \
2194           "Adaptive size policy maximum GC pause time goal in millisecond, "\
2195           "or (G1 Only) the maximum GC time per MMU time slice")            \
2196                                                                             \
2197   product(uintx, GCPauseIntervalMillis, 0,                                  \
2198           "Time slice for MMU specification")                               \
2199                                                                             \
2200   product(uintx, MaxGCMinorPauseMillis, max_uintx,                          \
2201           "Adaptive size policy maximum GC minor pause time goal "          \
2202           "in millisecond")                                                 \
2203                                                                             \
2204   product(uintx, GCTimeRatio, 99,                                           \
2205           "Adaptive size policy application time to GC time ratio")         \
2206                                                                             \
2207   product(uintx, AdaptiveSizeDecrementScaleFactor, 4,                       \
2208           "Adaptive size scale down factor for shrinking")                  \
2209                                                                             \
2210   product(bool, UseAdaptiveSizeDecayMajorGCCost, true,                      \
2211           "Adaptive size decays the major cost for long major intervals")   \
2212                                                                             \
2213   product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10,                     \
2214           "Time scale over which major costs decay")                        \
2215                                                                             \
2216   product(uintx, MinSurvivorRatio, 3,                                       \
2217           "Minimum ratio of young generation/survivor space size")          \
2218                                                                             \
2219   product(uintx, InitialSurvivorRatio, 8,                                   \
2220           "Initial ratio of young generation/survivor space size")          \
2221                                                                             \
2222   product(uintx, BaseFootPrintEstimate, 256*M,                              \
2223           "Estimate of footprint other than Java Heap")                     \
2224                                                                             \
2225   product(bool, UseGCOverheadLimit, true,                                   \
2226           "Use policy to limit of proportion of time spent in GC "          \
2227           "before an OutOfMemory error is thrown")                          \
2228                                                                             \
2229   product(uintx, GCTimeLimit, 98,                                           \
2230           "Limit of the proportion of time spent in GC before "             \
2231           "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)")      \
2232                                                                             \
2233   product(uintx, GCHeapFreeLimit, 2,                                        \
2234           "Minimum percentage of free space after a full GC before an "     \
2235           "OutOfMemoryError is thrown (used with GCTimeLimit)")             \
2236                                                                             \
2237   develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5,                 \
2238           "Number of consecutive collections before gc time limit fires")   \
2239                                                                             \
2240   product(bool, PrintAdaptiveSizePolicy, false,                             \
2241           "Print information about AdaptiveSizePolicy")                     \
2242                                                                             \
2243   product(intx, PrefetchCopyIntervalInBytes, -1,                            \
2244           "How far ahead to prefetch destination area (<= 0 means off)")    \
2245                                                                             \
2246   product(intx, PrefetchScanIntervalInBytes, -1,                            \
2247           "How far ahead to prefetch scan area (<= 0 means off)")           \
2248                                                                             \
2249   product(intx, PrefetchFieldsAhead, -1,                                    \
2250           "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2251                                                                             \
2252   diagnostic(bool, VerifySilently, false,                                   \
2253           "Do not print the verification progress")                         \
2254                                                                             \
2255   diagnostic(bool, VerifyDuringStartup, false,                              \
2256           "Verify memory system before executing any Java code "            \
2257           "during VM initialization")                                       \
2258                                                                             \
2259   diagnostic(bool, VerifyBeforeExit, trueInDebug,                           \
2260           "Verify system before exiting")                                   \
2261                                                                             \
2262   diagnostic(bool, VerifyBeforeGC, false,                                   \
2263           "Verify memory system before GC")                                 \
2264                                                                             \
2265   diagnostic(bool, VerifyAfterGC, false,                                    \
2266           "Verify memory system after GC")                                  \
2267                                                                             \
2268   diagnostic(bool, VerifyDuringGC, false,                                   \
2269           "Verify memory system during GC (between phases)")                \
2270                                                                             \
2271   diagnostic(bool, GCParallelVerificationEnabled, true,                     \
2272           "Enable parallel memory system verification")                     \
2273                                                                             \
2274   diagnostic(bool, DeferInitialCardMark, false,                             \
2275           "When +ReduceInitialCardMarks, explicitly defer any that "        \
2276           "may arise from new_pre_store_barrier")                           \
2277                                                                             \
2278   diagnostic(bool, VerifyRememberedSets, false,                             \
2279           "Verify GC remembered sets")                                      \
2280                                                                             \
2281   diagnostic(bool, VerifyObjectStartArray, true,                            \
2282           "Verify GC object start array if verify before/after")            \
2283                                                                             \
2284   product(bool, DisableExplicitGC, false,                                   \
2285           "Ignore calls to System.gc()")                                    \
2286                                                                             \
2287   notproduct(bool, CheckMemoryInitialization, false,                        \
2288           "Check memory initialization")                                    \
2289                                                                             \
2290   diagnostic(bool, BindCMSThreadToCPU, false,                               \
2291           "Bind CMS Thread to CPU if possible")                             \
2292                                                                             \
2293   diagnostic(uintx, CPUForCMSThread, 0,                                     \
2294           "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2295                                                                             \
2296   product(bool, BindGCTaskThreadsToCPUs, false,                             \
2297           "Bind GCTaskThreads to CPUs if possible")                         \
2298                                                                             \
2299   product(bool, UseGCTaskAffinity, false,                                   \
2300           "Use worker affinity when asking for GCTasks")                    \
2301                                                                             \
2302   product(uintx, ProcessDistributionStride, 4,                              \
2303           "Stride through processors when distributing processes")          \
2304                                                                             \
2305   product(uintx, CMSCoordinatorYieldSleepCount, 10,                         \
2306           "Number of times the coordinator GC thread will sleep while "     \
2307           "yielding before giving up and resuming GC")                      \
2308                                                                             \
2309   product(uintx, CMSYieldSleepCount, 0,                                     \
2310           "Number of times a GC thread (minus the coordinator) "            \
2311           "will sleep while yielding before giving up and resuming GC")     \
2312                                                                             \
2313   /* gc tracing */                                                          \
2314   manageable(bool, PrintGC, false,                                          \
2315           "Print message at garbage collection")                            \
2316                                                                             \
2317   manageable(bool, PrintGCDetails, false,                                   \
2318           "Print more details at garbage collection")                       \
2319                                                                             \
2320   manageable(bool, PrintGCDateStamps, false,                                \
2321           "Print date stamps at garbage collection")                        \
2322                                                                             \
2323   manageable(bool, PrintGCTimeStamps, false,                                \
2324           "Print timestamps at garbage collection")                         \
2325                                                                             \
2326   manageable(bool, PrintGCID, true,                                         \
2327           "Print an identifier for each garbage collection")                \
2328                                                                             \
2329   product(bool, PrintGCTaskTimeStamps, false,                               \
2330           "Print timestamps for individual gc worker thread tasks")         \
2331                                                                             \
2332   develop(intx, ConcGCYieldTimeout, 0,                                      \
2333           "If non-zero, assert that GC threads yield within this "          \
2334           "number of milliseconds")                                         \
2335                                                                             \
2336   notproduct(bool, TraceMarkSweep, false,                                   \
2337           "Trace mark sweep")                                               \
2338                                                                             \
2339   product(bool, PrintReferenceGC, false,                                    \
2340           "Print times spent handling reference objects during GC "         \
2341           "(enabled only when PrintGCDetails)")                             \
2342                                                                             \
2343   develop(bool, TraceReferenceGC, false,                                    \
2344           "Trace handling of soft/weak/final/phantom references")           \
2345                                                                             \
2346   develop(bool, TraceFinalizerRegistration, false,                          \
2347           "Trace registration of final references")                         \
2348                                                                             \
2349   notproduct(bool, TraceScavenge, false,                                    \
2350           "Trace scavenge")                                                 \
2351                                                                             \
2352   product(bool, IgnoreEmptyClassPaths, false,                               \
2353           "Ignore empty path elements in -classpath")                       \
2354                                                                             \
2355   product(bool, TraceClassPaths, false,                                     \
2356           "Trace processing of class paths")                                \
2357                                                                             \
2358   product_rw(bool, TraceClassLoading, false,                                \
2359           "Trace all classes loaded")                                       \
2360                                                                             \
2361   product(bool, TraceClassLoadingPreorder, false,                           \
2362           "Trace all classes loaded in order referenced (not loaded)")      \
2363                                                                             \
2364   product_rw(bool, TraceClassUnloading, false,                              \
2365           "Trace unloading of classes")                                     \
2366                                                                             \
2367   product_rw(bool, TraceLoaderConstraints, false,                           \
2368           "Trace loader constraints")                                       \
2369                                                                             \
2370   develop(bool, TraceClassLoaderData, false,                                \
2371           "Trace class loader loader_data lifetime")                        \
2372                                                                             \
2373   product(uintx, InitialBootClassLoaderMetaspaceSize,                       \
2374           NOT_LP64(2200*K) LP64_ONLY(4*M),                                  \
2375           "Initial size of the boot class loader data metaspace")           \
2376                                                                             \
2377   product(bool, TraceYoungGenTime, false,                                   \
2378           "Trace accumulated time for young collection")                    \
2379                                                                             \
2380   product(bool, TraceOldGenTime, false,                                     \
2381           "Trace accumulated time for old collection")                      \
2382                                                                             \
2383   product(bool, PrintTenuringDistribution, false,                           \
2384           "Print tenuring age information")                                 \
2385                                                                             \
2386   product_rw(bool, PrintHeapAtGC, false,                                    \
2387           "Print heap layout before and after each GC")                     \
2388                                                                             \
2389   product_rw(bool, PrintHeapAtGCExtended, false,                            \
2390           "Print extended information about the layout of the heap "        \
2391           "when -XX:+PrintHeapAtGC is set")                                 \
2392                                                                             \
2393   product(bool, PrintHeapAtSIGBREAK, true,                                  \
2394           "Print heap layout in response to SIGBREAK")                      \
2395                                                                             \
2396   manageable(bool, PrintClassHistogramBeforeFullGC, false,                  \
2397           "Print a class histogram before any major stop-world GC")         \
2398                                                                             \
2399   manageable(bool, PrintClassHistogramAfterFullGC, false,                   \
2400           "Print a class histogram after any major stop-world GC")          \
2401                                                                             \
2402   manageable(bool, PrintClassHistogram, false,                              \
2403           "Print a histogram of class instances")                           \
2404                                                                             \
2405   develop(bool, TraceWorkGang, false,                                       \
2406           "Trace activities of work gangs")                                 \
2407                                                                             \
2408   product(bool, TraceParallelOldGCTasks, false,                             \
2409           "Trace multithreaded GC activity")                                \
2410                                                                             \
2411   develop(bool, TraceBlockOffsetTable, false,                               \
2412           "Print BlockOffsetTable maps")                                    \
2413                                                                             \
2414   develop(bool, TraceCardTableModRefBS, false,                              \
2415           "Print CardTableModRefBS maps")                                   \
2416                                                                             \
2417   develop(bool, TraceGCTaskManager, false,                                  \
2418           "Trace actions of the GC task manager")                           \
2419                                                                             \
2420   develop(bool, TraceGCTaskQueue, false,                                    \
2421           "Trace actions of the GC task queues")                            \
2422                                                                             \
2423   diagnostic(bool, TraceGCTaskThread, false,                                \
2424           "Trace actions of the GC task threads")                           \
2425                                                                             \
2426   product(bool, PrintParallelOldGCPhaseTimes, false,                        \
2427           "Print the time taken by each phase in ParallelOldGC "            \
2428           "(PrintGCDetails must also be enabled)")                          \
2429                                                                             \
2430   develop(bool, TraceParallelOldGCMarkingPhase, false,                      \
2431           "Trace marking phase in ParallelOldGC")                           \
2432                                                                             \
2433   develop(bool, TraceParallelOldGCSummaryPhase, false,                      \
2434           "Trace summary phase in ParallelOldGC")                           \
2435                                                                             \
2436   develop(bool, TraceParallelOldGCCompactionPhase, false,                   \
2437           "Trace compaction phase in ParallelOldGC")                        \
2438                                                                             \
2439   develop(bool, TraceParallelOldGCDensePrefix, false,                       \
2440           "Trace dense prefix computation for ParallelOldGC")               \
2441                                                                             \
2442   develop(bool, IgnoreLibthreadGPFault, false,                              \
2443           "Suppress workaround for libthread GP fault")                     \
2444                                                                             \
2445   product(bool, PrintJNIGCStalls, false,                                    \
2446           "Print diagnostic message when GC is stalled "                    \
2447           "by JNI critical section")                                        \
2448                                                                             \
2449   experimental(double, ObjectCountCutOffPercent, 0.5,                       \
2450           "The percentage of the used heap that the instances of a class "  \
2451           "must occupy for the class to generate a trace event")            \
2452                                                                             \
2453   /* GC log rotation setting */                                             \
2454                                                                             \
2455   product(bool, UseGCLogFileRotation, false,                                \
2456           "Rotate gclog files (for long running applications). It requires "\
2457           "-Xloggc:<filename>")                                             \
2458                                                                             \
2459   product(uintx, NumberOfGCLogFiles, 0,                                     \
2460           "Number of gclog files in rotation "                              \
2461           "(default: 0, no rotation)")                                      \
2462                                                                             \
2463   product(uintx, GCLogFileSize, 8*K,                                        \
2464           "GC log file size, requires UseGCLogFileRotation. "               \
2465           "Set to 0 to only trigger rotation via jcmd")                     \
2466                                                                             \
2467   /* JVMTI heap profiling */                                                \
2468                                                                             \
2469   diagnostic(bool, TraceJVMTIObjectTagging, false,                          \
2470           "Trace JVMTI object tagging calls")                               \
2471                                                                             \
2472   diagnostic(bool, VerifyBeforeIteration, false,                            \
2473           "Verify memory system before JVMTI iteration")                    \
2474                                                                             \
2475   /* compiler interface */                                                  \
2476                                                                             \
2477   develop(bool, CIPrintCompilerName, false,                                 \
2478           "when CIPrint is active, print the name of the active compiler")  \
2479                                                                             \
2480   diagnostic(bool, CIPrintCompileQueue, false,                              \
2481           "display the contents of the compile queue whenever a "           \
2482           "compilation is enqueued")                                        \
2483                                                                             \
2484   develop(bool, CIPrintRequests, false,                                     \
2485           "display every request for compilation")                          \
2486                                                                             \
2487   product(bool, CITime, false,                                              \
2488           "collect timing information for compilation")                     \
2489                                                                             \
2490   develop(bool, CITimeVerbose, false,                                       \
2491           "be more verbose in compilation timings")                         \
2492                                                                             \
2493   develop(bool, CITimeEach, false,                                          \
2494           "display timing information after each successful compilation")   \
2495                                                                             \
2496   develop(bool, CICountOSR, false,                                          \
2497           "use a separate counter when assigning ids to osr compilations")  \
2498                                                                             \
2499   develop(bool, CICompileNatives, true,                                     \
2500           "compile native methods if supported by the compiler")            \
2501                                                                             \
2502   develop_pd(bool, CICompileOSR,                                            \
2503           "compile on stack replacement methods if supported by the "       \
2504           "compiler")                                                       \
2505                                                                             \
2506   develop(bool, CIPrintMethodCodes, false,                                  \
2507           "print method bytecodes of the compiled code")                    \
2508                                                                             \
2509   develop(bool, CIPrintTypeFlow, false,                                     \
2510           "print the results of ciTypeFlow analysis")                       \
2511                                                                             \
2512   develop(bool, CITraceTypeFlow, false,                                     \
2513           "detailed per-bytecode tracing of ciTypeFlow analysis")           \
2514                                                                             \
2515   develop(intx, OSROnlyBCI, -1,                                             \
2516           "OSR only at this bci.  Negative values mean exclude that bci")   \
2517                                                                             \
2518   /* compiler */                                                            \
2519                                                                             \
2520   product(intx, CICompilerCount, CI_COMPILER_COUNT,                         \
2521           "Number of compiler threads to run")                              \
2522                                                                             \
2523   product(intx, CompilationPolicyChoice, 0,                                 \
2524           "which compilation policy (0/1)")                                 \
2525                                                                             \
2526   develop(bool, UseStackBanging, true,                                      \
2527           "use stack banging for stack overflow checks (required for "      \
2528           "proper StackOverflow handling; disable only to measure cost "    \
2529           "of stackbanging)")                                               \
2530                                                                             \
2531   develop(bool, UseStrictFP, true,                                          \
2532           "use strict fp if modifier strictfp is set")                      \
2533                                                                             \
2534   develop(bool, GenerateSynchronizationCode, true,                          \
2535           "generate locking/unlocking code for synchronized methods and "   \
2536           "monitors")                                                       \
2537                                                                             \
2538   develop(bool, GenerateCompilerNullChecks, true,                           \
2539           "Generate explicit null checks for loads/stores/calls")           \
2540                                                                             \
2541   develop(bool, GenerateRangeChecks, true,                                  \
2542           "Generate range checks for array accesses")                       \
2543                                                                             \
2544   develop_pd(bool, ImplicitNullChecks,                                      \
2545           "Generate code for implicit null checks")                         \
2546                                                                             \
2547   product_pd(bool, TrapBasedNullChecks,                                     \
2548           "Generate code for null checks that uses a cmp and trap "         \
2549           "instruction raising SIGTRAP.  This is only used if an access to" \
2550           "null (+offset) will not raise a SIGSEGV, i.e.,"                  \
2551           "ImplicitNullChecks don't work (PPC64).")                         \
2552                                                                             \
2553   product(bool, PrintSafepointStatistics, false,                            \
2554           "Print statistics about safepoint synchronization")               \
2555                                                                             \
2556   product(intx, PrintSafepointStatisticsCount, 300,                         \
2557           "Total number of safepoint statistics collected "                 \
2558           "before printing them out")                                       \
2559                                                                             \
2560   product(intx, PrintSafepointStatisticsTimeout,  -1,                       \
2561           "Print safepoint statistics only when safepoint takes "           \
2562           "more than PrintSafepointSatisticsTimeout in millis")             \
2563                                                                             \
2564   product(bool, TraceSafepointCleanupTime, false,                           \
2565           "Print the break down of clean up tasks performed during "        \
2566           "safepoint")                                                      \
2567                                                                             \
2568   product(bool, Inline, true,                                               \
2569           "Enable inlining")                                                \
2570                                                                             \
2571   product(bool, ClipInlining, true,                                         \
2572           "Clip inlining if aggregate method exceeds DesiredMethodLimit")   \
2573                                                                             \
2574   develop(bool, UseCHA, true,                                               \
2575           "Enable CHA")                                                     \
2576                                                                             \
2577   product(bool, UseTypeProfile, true,                                       \
2578           "Check interpreter profile for historically monomorphic calls")   \
2579                                                                             \
2580   diagnostic(bool, PrintInlining, false,                                    \
2581           "Print inlining optimizations")                                   \
2582                                                                             \
2583   product(bool, UsePopCountInstruction, false,                              \
2584           "Use population count instruction")                               \
2585                                                                             \
2586   develop(bool, EagerInitialization, false,                                 \
2587           "Eagerly initialize classes if possible")                         \
2588                                                                             \
2589   develop(bool, TraceMethodReplacement, false,                              \
2590           "Print when methods are replaced do to recompilation")            \
2591                                                                             \
2592   develop(bool, PrintMethodFlushing, false,                                 \
2593           "Print the nmethods being flushed")                               \
2594                                                                             \
2595   diagnostic(bool, PrintMethodFlushingStatistics, false,                    \
2596           "print statistics about method flushing")                         \
2597                                                                             \
2598   diagnostic(intx, HotMethodDetectionLimit, 100000,                         \
2599           "Number of compiled code invocations after which "                \
2600           "the method is considered as hot by the flusher")                 \
2601                                                                             \
2602   diagnostic(intx, MinPassesBeforeFlush, 10,                                \
2603           "Minimum number of sweeper passes before an nmethod "             \
2604           "can be flushed")                                                 \
2605                                                                             \
2606   product(bool, UseCodeAging, true,                                         \
2607           "Insert counter to detect warm methods")                          \
2608                                                                             \
2609   diagnostic(bool, StressCodeAging, false,                                  \
2610           "Start with counters compiled in")                                \
2611                                                                             \
2612   develop(bool, UseRelocIndex, false,                                       \
2613           "Use an index to speed random access to relocations")             \
2614                                                                             \
2615   develop(bool, StressCodeBuffers, false,                                   \
2616           "Exercise code buffer expansion and other rare state changes")    \
2617                                                                             \
2618   diagnostic(bool, DebugNonSafepoints, trueInDebug,                         \
2619           "Generate extra debugging information for non-safepoints in "     \
2620           "nmethods")                                                       \
2621                                                                             \
2622   product(bool, PrintVMOptions, false,                                      \
2623           "Print flags that appeared on the command line")                  \
2624                                                                             \
2625   product(bool, IgnoreUnrecognizedVMOptions, false,                         \
2626           "Ignore unrecognized VM options")                                 \
2627                                                                             \
2628   product(bool, PrintCommandLineFlags, false,                               \
2629           "Print flags specified on command line or set by ergonomics")     \
2630                                                                             \
2631   product(bool, PrintFlagsInitial, false,                                   \
2632           "Print all VM flags before argument processing and exit VM")      \
2633                                                                             \
2634   product(bool, PrintFlagsFinal, false,                                     \
2635           "Print all VM flags after argument and ergonomic processing")     \
2636                                                                             \
2637   notproduct(bool, PrintFlagsWithComments, false,                           \
2638           "Print all VM flags with default values and descriptions and "    \
2639           "exit")                                                           \
2640                                                                             \
2641   diagnostic(bool, SerializeVMOutput, true,                                 \
2642           "Use a mutex to serialize output to tty and LogFile")             \
2643                                                                             \
2644   diagnostic(bool, DisplayVMOutput, true,                                   \
2645           "Display all VM output on the tty, independently of LogVMOutput") \
2646                                                                             \
2647   diagnostic(bool, LogVMOutput, false,                                      \
2648           "Save VM output to LogFile")                                      \
2649                                                                             \
2650   diagnostic(ccstr, LogFile, NULL,                                          \
2651           "If LogVMOutput or LogCompilation is on, save VM output to "      \
2652           "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2653                                                                             \
2654   product(ccstr, ErrorFile, NULL,                                           \
2655           "If an error occurs, save the error data to this file "           \
2656           "[default: ./hs_err_pid%p.log] (%p replaced with pid)")           \
2657                                                                             \
2658   product(bool, DisplayVMOutputToStderr, false,                             \
2659           "If DisplayVMOutput is true, display all VM output to stderr")    \
2660                                                                             \
2661   product(bool, DisplayVMOutputToStdout, false,                             \
2662           "If DisplayVMOutput is true, display all VM output to stdout")    \
2663                                                                             \
2664   product(bool, UseHeavyMonitors, false,                                    \
2665           "use heavyweight instead of lightweight Java monitors")           \
2666                                                                             \
2667   product(bool, PrintStringTableStatistics, false,                          \
2668           "print statistics about the StringTable and SymbolTable")         \
2669                                                                             \
2670   diagnostic(bool, VerifyStringTableAtExit, false,                          \
2671           "verify StringTable contents at exit")                            \
2672                                                                             \
2673   notproduct(bool, PrintSymbolTableSizeHistogram, false,                    \
2674           "print histogram of the symbol table")                            \
2675                                                                             \
2676   notproduct(bool, ExitVMOnVerifyError, false,                              \
2677           "standard exit from VM if bytecode verify error "                 \
2678           "(only in debug mode)")                                           \
2679                                                                             \
2680   notproduct(ccstr, AbortVMOnException, NULL,                               \
2681           "Call fatal if this exception is thrown.  Example: "              \
2682           "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2683                                                                             \
2684   notproduct(ccstr, AbortVMOnExceptionMessage, NULL,                        \
2685           "Call fatal if the exception pointed by AbortVMOnException "      \
2686           "has this message")                                               \
2687                                                                             \
2688   develop(bool, DebugVtables, false,                                        \
2689           "add debugging code to vtable dispatch")                          \
2690                                                                             \
2691   develop(bool, PrintVtables, false,                                        \
2692           "print vtables when printing klass")                              \
2693                                                                             \
2694   notproduct(bool, PrintVtableStats, false,                                 \
2695           "print vtables stats at end of run")                              \
2696                                                                             \
2697   develop(bool, TraceCreateZombies, false,                                  \
2698           "trace creation of zombie nmethods")                              \
2699                                                                             \
2700   notproduct(bool, IgnoreLockingAssertions, false,                          \
2701           "disable locking assertions (for speed)")                         \
2702                                                                             \
2703   product(bool, RangeCheckElimination, true,                                \
2704           "Eliminate range checks")                                         \
2705                                                                             \
2706   develop_pd(bool, UncommonNullCast,                                        \
2707           "track occurrences of null in casts; adjust compiler tactics")    \
2708                                                                             \
2709   develop(bool, TypeProfileCasts,  true,                                    \
2710           "treat casts like calls for purposes of type profiling")          \
2711                                                                             \
2712   develop(bool, DelayCompilationDuringStartup, true,                        \
2713           "Delay invoking the compiler until main application class is "    \
2714           "loaded")                                                         \
2715                                                                             \
2716   develop(bool, CompileTheWorld, false,                                     \
2717           "Compile all methods in all classes in bootstrap class path "     \
2718           "(stress test)")                                                  \
2719                                                                             \
2720   develop(bool, CompileTheWorldPreloadClasses, true,                        \
2721           "Preload all classes used by a class before start loading")       \
2722                                                                             \
2723   notproduct(intx, CompileTheWorldSafepointInterval, 100,                   \
2724           "Force a safepoint every n compiles so sweeper can keep up")      \
2725                                                                             \
2726   develop(bool, FillDelaySlots, true,                                       \
2727           "Fill delay slots (on SPARC only)")                               \
2728                                                                             \
2729   develop(bool, TimeLivenessAnalysis, false,                                \
2730           "Time computation of bytecode liveness analysis")                 \
2731                                                                             \
2732   develop(bool, TraceLivenessGen, false,                                    \
2733           "Trace the generation of liveness analysis information")          \
2734                                                                             \
2735   notproduct(bool, TraceLivenessQuery, false,                               \
2736           "Trace queries of liveness analysis information")                 \
2737                                                                             \
2738   notproduct(bool, CollectIndexSetStatistics, false,                        \
2739           "Collect information about IndexSets")                            \
2740                                                                             \
2741   develop(bool, UseLoopSafepoints, true,                                    \
2742           "Generate Safepoint nodes in every loop")                         \
2743                                                                             \
2744   develop(intx, FastAllocateSizeLimit, 128*K,                               \
2745           /* Note:  This value is zero mod 1<<13 for a cheap sparc set. */  \
2746           "Inline allocations larger than this in doublewords must go slow")\
2747                                                                             \
2748   product(bool, AggressiveOpts, false,                                      \
2749           "Enable aggressive optimizations - see arguments.cpp")            \
2750                                                                             \
2751   product_pd(uintx, TypeProfileLevel,                                       \
2752           "=XYZ, with Z: Type profiling of arguments at call; "             \
2753                      "Y: Type profiling of return value at call; "          \
2754                      "X: Type profiling of parameters to methods; "         \
2755           "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods")             \
2756                                                                             \
2757   product(intx, TypeProfileArgsLimit,     2,                                \
2758           "max number of call arguments to consider for type profiling")    \
2759                                                                             \
2760   product(intx, TypeProfileParmsLimit,    2,                                \
2761           "max number of incoming parameters to consider for type profiling"\
2762           ", -1 for all")                                                   \
2763                                                                             \
2764   /* statistics */                                                          \
2765   develop(bool, CountCompiledCalls, false,                                  \
2766           "Count method invocations")                                       \
2767                                                                             \
2768   notproduct(bool, CountRuntimeCalls, false,                                \
2769           "Count VM runtime calls")                                         \
2770                                                                             \
2771   develop(bool, CountJNICalls, false,                                       \
2772           "Count jni method invocations")                                   \
2773                                                                             \
2774   notproduct(bool, CountJVMCalls, false,                                    \
2775           "Count jvm method invocations")                                   \
2776                                                                             \
2777   notproduct(bool, CountRemovableExceptions, false,                         \
2778           "Count exceptions that could be replaced by branches due to "     \
2779           "inlining")                                                       \
2780                                                                             \
2781   notproduct(bool, ICMissHistogram, false,                                  \
2782           "Produce histogram of IC misses")                                 \
2783                                                                             \
2784   notproduct(bool, PrintClassStatistics, false,                             \
2785           "Print class statistics at end of run")                           \
2786                                                                             \
2787   notproduct(bool, PrintMethodStatistics, false,                            \
2788           "Print method statistics at end of run")                          \
2789                                                                             \
2790   /* interpreter */                                                         \
2791   develop(bool, ClearInterpreterLocals, false,                              \
2792           "Always clear local variables of interpreter activations upon "   \
2793           "entry")                                                          \
2794                                                                             \
2795   product_pd(bool, RewriteBytecodes,                                        \
2796           "Allow rewriting of bytecodes (bytecodes are not immutable)")     \
2797                                                                             \
2798   product_pd(bool, RewriteFrequentPairs,                                    \
2799           "Rewrite frequently used bytecode pairs into a single bytecode")  \
2800                                                                             \
2801   diagnostic(bool, PrintInterpreter, false,                                 \
2802           "Print the generated interpreter code")                           \
2803                                                                             \
2804   product(bool, UseInterpreter, true,                                       \
2805           "Use interpreter for non-compiled methods")                       \
2806                                                                             \
2807   develop(bool, UseFastSignatureHandlers, true,                             \
2808           "Use fast signature handlers for native calls")                   \
2809                                                                             \
2810   product(bool, UseLoopCounter, true,                                       \
2811           "Increment invocation counter on backward branch")                \
2812                                                                             \
2813   product_pd(bool, UseOnStackReplacement,                                   \
2814           "Use on stack replacement, calls runtime if invoc. counter "      \
2815           "overflows in loop")                                              \
2816                                                                             \
2817   notproduct(bool, TraceOnStackReplacement, false,                          \
2818           "Trace on stack replacement")                                     \
2819                                                                             \
2820   product_pd(bool, PreferInterpreterNativeStubs,                            \
2821           "Use always interpreter stubs for native methods invoked via "    \
2822           "interpreter")                                                    \
2823                                                                             \
2824   develop(bool, CountBytecodes, false,                                      \
2825           "Count number of bytecodes executed")                             \
2826                                                                             \
2827   develop(bool, PrintBytecodeHistogram, false,                              \
2828           "Print histogram of the executed bytecodes")                      \
2829                                                                             \
2830   develop(bool, PrintBytecodePairHistogram, false,                          \
2831           "Print histogram of the executed bytecode pairs")                 \
2832                                                                             \
2833   diagnostic(bool, PrintSignatureHandlers, false,                           \
2834           "Print code generated for native method signature handlers")      \
2835                                                                             \
2836   develop(bool, VerifyOops, false,                                          \
2837           "Do plausibility checks for oops")                                \
2838                                                                             \
2839   develop(bool, CheckUnhandledOops, false,                                  \
2840           "Check for unhandled oops in VM code")                            \
2841                                                                             \
2842   develop(bool, VerifyJNIFields, trueInDebug,                               \
2843           "Verify jfieldIDs for instance fields")                           \
2844                                                                             \
2845   notproduct(bool, VerifyJNIEnvThread, false,                               \
2846           "Verify JNIEnv.thread == Thread::current() when entering VM "     \
2847           "from JNI")                                                       \
2848                                                                             \
2849   develop(bool, VerifyFPU, false,                                           \
2850           "Verify FPU state (check for NaN's, etc.)")                       \
2851                                                                             \
2852   develop(bool, VerifyThread, false,                                        \
2853           "Watch the thread register for corruption (SPARC only)")          \
2854                                                                             \
2855   develop(bool, VerifyActivationFrameSize, false,                           \
2856           "Verify that activation frame didn't become smaller than its "    \
2857           "minimal size")                                                   \
2858                                                                             \
2859   develop(bool, TraceFrequencyInlining, false,                              \
2860           "Trace frequency based inlining")                                 \
2861                                                                             \
2862   develop_pd(bool, InlineIntrinsics,                                        \
2863           "Inline intrinsics that can be statically resolved")              \
2864                                                                             \
2865   product_pd(bool, ProfileInterpreter,                                      \
2866           "Profile at the bytecode level during interpretation")            \
2867                                                                             \
2868   develop(bool, TraceProfileInterpreter, false,                             \
2869           "Trace profiling at the bytecode level during interpretation. "   \
2870           "This outputs the profiling information collected to improve "    \
2871           "jit compilation.")                                               \
2872                                                                             \
2873   develop_pd(bool, ProfileTraps,                                            \
2874           "Profile deoptimization traps at the bytecode level")             \
2875                                                                             \
2876   product(intx, ProfileMaturityPercentage, 20,                              \
2877           "number of method invocations/branches (expressed as % of "       \
2878           "CompileThreshold) before using the method's profile")            \
2879                                                                             \
2880   diagnostic(bool, PrintMethodData, false,                                  \
2881           "Print the results of +ProfileInterpreter at end of run")         \
2882                                                                             \
2883   develop(bool, VerifyDataPointer, trueInDebug,                             \
2884           "Verify the method data pointer during interpreter profiling")    \
2885                                                                             \
2886   develop(bool, VerifyCompiledCode, false,                                  \
2887           "Include miscellaneous runtime verifications in nmethod code; "   \
2888           "default off because it disturbs nmethod size heuristics")        \
2889                                                                             \
2890   notproduct(bool, CrashGCForDumpingJavaThread, false,                      \
2891           "Manually make GC thread crash then dump java stack trace;  "     \
2892           "Test only")                                                      \
2893                                                                             \
2894   /* compilation */                                                         \
2895   product(bool, UseCompiler, true,                                          \
2896           "Use Just-In-Time compilation")                                   \
2897                                                                             \
2898   develop(bool, TraceCompilationPolicy, false,                              \
2899           "Trace compilation policy")                                       \
2900                                                                             \
2901   develop(bool, TimeCompilationPolicy, false,                               \
2902           "Time the compilation policy")                                    \
2903                                                                             \
2904   product(bool, UseCounterDecay, true,                                      \
2905           "Adjust recompilation counters")                                  \
2906                                                                             \
2907   develop(intx, CounterHalfLifeTime,    30,                                 \
2908           "Half-life time of invocation counters (in seconds)")             \
2909                                                                             \
2910   develop(intx, CounterDecayMinIntervalLength,   500,                       \
2911           "The minimum interval (in milliseconds) between invocation of "   \
2912           "CounterDecay")                                                   \
2913                                                                             \
2914   product(bool, AlwaysCompileLoopMethods, false,                            \
2915           "When using recompilation, never interpret methods "              \
2916           "containing loops")                                               \
2917                                                                             \
2918   product(bool, DontCompileHugeMethods, true,                               \
2919           "Do not compile methods > HugeMethodLimit")                       \
2920                                                                             \
2921   /* Bytecode escape analysis estimation. */                                \
2922   product(bool, EstimateArgEscape, true,                                    \
2923           "Analyze bytecodes to estimate escape state of arguments")        \
2924                                                                             \
2925   product(intx, BCEATraceLevel, 0,                                          \
2926           "How much tracing to do of bytecode escape analysis estimates")   \
2927                                                                             \
2928   product(intx, MaxBCEAEstimateLevel, 5,                                    \
2929           "Maximum number of nested calls that are analyzed by BC EA")      \
2930                                                                             \
2931   product(intx, MaxBCEAEstimateSize, 150,                                   \
2932           "Maximum bytecode size of a method to be analyzed by BC EA")      \
2933                                                                             \
2934   product(intx,  AllocatePrefetchStyle, 1,                                  \
2935           "0 = no prefetch, "                                               \
2936           "1 = prefetch instructions for each allocation, "                 \
2937           "2 = use TLAB watermark to gate allocation prefetch, "            \
2938           "3 = use BIS instruction on Sparc for allocation prefetch")       \
2939                                                                             \
2940   product(intx,  AllocatePrefetchDistance, -1,                              \
2941           "Distance to prefetch ahead of allocation pointer")               \
2942                                                                             \
2943   product(intx,  AllocatePrefetchLines, 3,                                  \
2944           "Number of lines to prefetch ahead of array allocation pointer")  \
2945                                                                             \
2946   product(intx,  AllocateInstancePrefetchLines, 1,                          \
2947           "Number of lines to prefetch ahead of instance allocation "       \
2948           "pointer")                                                        \
2949                                                                             \
2950   product(intx,  AllocatePrefetchStepSize, 16,                              \
2951           "Step size in bytes of sequential prefetch instructions")         \
2952                                                                             \
2953   product(intx,  AllocatePrefetchInstr, 0,                                  \
2954           "Prefetch instruction to prefetch ahead of allocation pointer")   \
2955                                                                             \
2956   /* deoptimization */                                                      \
2957   develop(bool, TraceDeoptimization, false,                                 \
2958           "Trace deoptimization")                                           \
2959                                                                             \
2960   develop(bool, DebugDeoptimization, false,                                 \
2961           "Tracing various information while debugging deoptimization")     \
2962                                                                             \
2963   product(intx, SelfDestructTimer, 0,                                       \
2964           "Will cause VM to terminate after a given time (in minutes) "     \
2965           "(0 means off)")                                                  \
2966                                                                             \
2967   product(intx, MaxJavaStackTraceDepth, 1024,                               \
2968           "The maximum number of lines in the stack trace for Java "        \
2969           "exceptions (0 means all)")                                       \
2970                                                                             \
2971   NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000,          \
2972           "Guarantee a safepoint (at least) every so many milliseconds "    \
2973           "(0 means none)"))                                                \
2974                                                                             \
2975   EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0,               \
2976           "Guarantee a safepoint (at least) every so many milliseconds "    \
2977           "(0 means none)"))                                                \
2978                                                                             \
2979   product(intx, SafepointTimeoutDelay, 10000,                               \
2980           "Delay in milliseconds for option SafepointTimeout")              \
2981                                                                             \
2982   product(intx, NmethodSweepActivity, 10,                                   \
2983           "Removes cold nmethods from code cache if > 0. Higher values "    \
2984           "result in more aggressive sweeping")                             \
2985                                                                             \
2986   notproduct(bool, LogSweeper, false,                                       \
2987           "Keep a ring buffer of sweeper activity")                         \
2988                                                                             \
2989   notproduct(intx, SweeperLogEntries, 1024,                                 \
2990           "Number of records in the ring buffer of sweeper activity")       \
2991                                                                             \
2992   notproduct(intx, MemProfilingInterval, 500,                               \
2993           "Time between each invocation of the MemProfiler")                \
2994                                                                             \
2995   develop(intx, MallocCatchPtr, -1,                                         \
2996           "Hit breakpoint when mallocing/freeing this pointer")             \
2997                                                                             \
2998   notproduct(intx, AssertRepeat, 1,                                         \
2999           "number of times to evaluate expression in assert "               \
3000           "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
3001                                                                             \
3002   notproduct(ccstrlist, SuppressErrorAt, "",                                \
3003           "List of assertions (file:line) to muzzle")                       \
3004                                                                             \
3005   notproduct(uintx, HandleAllocationLimit, 1024,                            \
3006           "Threshold for HandleMark allocation when +TraceHandleAllocation "\
3007           "is used")                                                        \
3008                                                                             \
3009   develop(uintx, TotalHandleAllocationLimit, 1024,                          \
3010           "Threshold for total handle allocation when "                     \
3011           "+TraceHandleAllocation is used")                                 \
3012                                                                             \
3013   develop(intx, StackPrintLimit, 100,                                       \
3014           "number of stack frames to print in VM-level stack dump")         \
3015                                                                             \
3016   notproduct(intx, MaxElementPrintSize, 256,                                \
3017           "maximum number of elements to print")                            \
3018                                                                             \
3019   notproduct(intx, MaxSubklassPrintSize, 4,                                 \
3020           "maximum number of subklasses to print when printing klass")      \
3021                                                                             \
3022   product(intx, MaxInlineLevel, 9,                                          \
3023           "maximum number of nested calls that are inlined")                \
3024                                                                             \
3025   product(intx, MaxRecursiveInlineLevel, 1,                                 \
3026           "maximum number of nested recursive calls that are inlined")      \
3027                                                                             \
3028   develop(intx, MaxForceInlineLevel, 100,                                   \
3029           "maximum number of nested calls that are forced for inlining "    \
3030           "(using CompilerOracle or marked w/ @ForceInline)")               \
3031                                                                             \
3032   product_pd(intx, InlineSmallCode,                                         \
3033           "Only inline already compiled methods if their code size is "     \
3034           "less than this")                                                 \
3035                                                                             \
3036   product(intx, MaxInlineSize, 35,                                          \
3037           "The maximum bytecode size of a method to be inlined")            \
3038                                                                             \
3039   product_pd(intx, FreqInlineSize,                                          \
3040           "The maximum bytecode size of a frequent method to be inlined")   \
3041                                                                             \
3042   product(intx, MaxTrivialSize, 6,                                          \
3043           "The maximum bytecode size of a trivial method to be inlined")    \
3044                                                                             \
3045   product(intx, MinInliningThreshold, 250,                                  \
3046           "The minimum invocation count a method needs to have to be "      \
3047           "inlined")                                                        \
3048                                                                             \
3049   develop(intx, MethodHistogramCutoff, 100,                                 \
3050           "The cutoff value for method invocation histogram (+CountCalls)") \
3051                                                                             \
3052   develop(intx, ProfilerNumberOfInterpretedMethods, 25,                     \
3053           "Number of interpreted methods to show in profile")               \
3054                                                                             \
3055   develop(intx, ProfilerNumberOfCompiledMethods, 25,                        \
3056           "Number of compiled methods to show in profile")                  \
3057                                                                             \
3058   develop(intx, ProfilerNumberOfStubMethods, 25,                            \
3059           "Number of stub methods to show in profile")                      \
3060                                                                             \
3061   develop(intx, ProfilerNumberOfRuntimeStubNodes, 25,                       \
3062           "Number of runtime stub nodes to show in profile")                \
3063                                                                             \
3064   product(intx, ProfileIntervalsTicks, 100,                                 \
3065           "Number of ticks between printing of interval profile "           \
3066           "(+ProfileIntervals)")                                            \
3067                                                                             \
3068   notproduct(intx, ScavengeALotInterval,     1,                             \
3069           "Interval between which scavenge will occur with +ScavengeALot")  \
3070                                                                             \
3071   notproduct(intx, FullGCALotInterval,     1,                               \
3072           "Interval between which full gc will occur with +FullGCALot")     \
3073                                                                             \
3074   notproduct(intx, FullGCALotStart,     0,                                  \
3075           "For which invocation to start FullGCAlot")                       \
3076                                                                             \
3077   notproduct(intx, FullGCALotDummies,  32*K,                                \
3078           "Dummy object allocated with +FullGCALot, forcing all objects "   \
3079           "to move")                                                        \
3080                                                                             \
3081   develop(intx, DontYieldALotInterval,    10,                               \
3082           "Interval between which yields will be dropped (milliseconds)")   \
3083                                                                             \
3084   develop(intx, MinSleepInterval,     1,                                    \
3085           "Minimum sleep() interval (milliseconds) when "                   \
3086           "ConvertSleepToYield is off (used for Solaris)")                  \
3087                                                                             \
3088   develop(intx, ProfilerPCTickThreshold,    15,                             \
3089           "Number of ticks in a PC buckets to be a hotspot")                \
3090                                                                             \
3091   notproduct(intx, DeoptimizeALotInterval,     5,                           \
3092           "Number of exits until DeoptimizeALot kicks in")                  \
3093                                                                             \
3094   notproduct(intx, ZombieALotInterval,     5,                               \
3095           "Number of exits until ZombieALot kicks in")                      \
3096                                                                             \
3097   diagnostic(intx, MallocVerifyInterval,     0,                             \
3098           "If non-zero, verify C heap after every N calls to "              \
3099           "malloc/realloc/free")                                            \
3100                                                                             \
3101   diagnostic(intx, MallocVerifyStart,     0,                                \
3102           "If non-zero, start verifying C heap after Nth call to "          \
3103           "malloc/realloc/free")                                            \
3104                                                                             \
3105   diagnostic(uintx, MallocMaxTestWords,     0,                              \
3106           "If non-zero, maximum number of words that malloc/realloc can "   \
3107           "allocate (for testing only)")                                    \
3108                                                                             \
3109   product(intx, TypeProfileWidth,     2,                                    \
3110           "Number of receiver types to record in call/cast profile")        \
3111                                                                             \
3112   develop(intx, BciProfileWidth,      2,                                    \
3113           "Number of return bci's to record in ret profile")                \
3114                                                                             \
3115   product(intx, PerMethodRecompilationCutoff, 400,                          \
3116           "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3117                                                                             \
3118   product(intx, PerBytecodeRecompilationCutoff, 200,                        \
3119           "Per-BCI limit on repeated recompilation (-1=>'Inf')")            \
3120                                                                             \
3121   product(intx, PerMethodTrapLimit,  100,                                   \
3122           "Limit on traps (of one kind) in a method (includes inlines)")    \
3123                                                                             \
3124   experimental(intx, PerMethodSpecTrapLimit,  5000,                         \
3125           "Limit on speculative traps (of one kind) in a method (includes inlines)") \
3126                                                                             \
3127   product(intx, PerBytecodeTrapLimit,  4,                                   \
3128           "Limit on traps (of one kind) at a particular BCI")               \
3129                                                                             \
3130   experimental(intx, SpecTrapLimitExtraEntries,  3,                         \
3131           "Extra method data trap entries for speculation")                 \
3132                                                                             \
3133   develop(intx, InlineFrequencyRatio,    20,                                \
3134           "Ratio of call site execution to caller method invocation")       \
3135                                                                             \
3136   develop_pd(intx, InlineFrequencyCount,                                    \
3137           "Count of call site execution necessary to trigger frequent "     \
3138           "inlining")                                                       \
3139                                                                             \
3140   develop(intx, InlineThrowCount,    50,                                    \
3141           "Force inlining of interpreted methods that throw this often")    \
3142                                                                             \
3143   develop(intx, InlineThrowMaxSize,   200,                                  \
3144           "Force inlining of throwing methods smaller than this")           \
3145                                                                             \
3146   develop(intx, ProfilerNodeSize,  1024,                                    \
3147           "Size in K to allocate for the Profile Nodes of each thread")     \
3148                                                                             \
3149   product_pd(intx, PreInflateSpin,                                          \
3150           "Number of times to spin wait before inflation")                  \
3151                                                                             \
3152   /* gc parameters */                                                       \
3153   product(uintx, InitialHeapSize, 0,                                        \
3154           "Initial heap size (in bytes); zero means use ergonomics")        \
3155                                                                             \
3156   product(uintx, MaxHeapSize, ScaleForWordSize(96*M),                       \
3157           "Maximum heap size (in bytes)")                                   \
3158                                                                             \
3159   product(uintx, OldSize, ScaleForWordSize(4*M),                            \
3160           "Initial tenured generation size (in bytes)")                     \
3161                                                                             \
3162   product(uintx, NewSize, ScaleForWordSize(1*M),                            \
3163           "Initial new generation size (in bytes)")                         \
3164                                                                             \
3165   product(uintx, MaxNewSize, max_uintx,                                     \
3166           "Maximum new generation size (in bytes), max_uintx means set "    \
3167           "ergonomically")                                                  \
3168                                                                             \
3169   product(uintx, PretenureSizeThreshold, 0,                                 \
3170           "Maximum size in bytes of objects allocated in DefNew "           \
3171           "generation; zero means no maximum")                              \
3172                                                                             \
3173   product(uintx, TLABSize, 0,                                               \
3174           "Starting TLAB size (in bytes); zero means set ergonomically")    \
3175                                                                             \
3176   product(uintx, MinTLABSize, 2*K,                                          \
3177           "Minimum allowed TLAB size (in bytes)")                           \
3178                                                                             \
3179   product(uintx, TLABAllocationWeight, 35,                                  \
3180           "Allocation averaging weight")                                    \
3181                                                                             \
3182   product(uintx, TLABWasteTargetPercent, 1,                                 \
3183           "Percentage of Eden that can be wasted")                          \
3184                                                                             \
3185   product(uintx, TLABRefillWasteFraction,    64,                            \
3186           "Maximum TLAB waste at a refill (internal fragmentation)")        \
3187                                                                             \
3188   product(uintx, TLABWasteIncrement,    4,                                  \
3189           "Increment allowed waste at slow allocation")                     \
3190                                                                             \
3191   product(uintx, SurvivorRatio, 8,                                          \
3192           "Ratio of eden/survivor space size")                              \
3193                                                                             \
3194   product(uintx, NewRatio, 2,                                               \
3195           "Ratio of old/new generation sizes")                              \
3196                                                                             \
3197   product_pd(uintx, NewSizeThreadIncrease,                                  \
3198           "Additional size added to desired new generation size per "       \
3199           "non-daemon thread (in bytes)")                                   \
3200                                                                             \
3201   product_pd(uintx, MetaspaceSize,                                          \
3202           "Initial size of Metaspaces (in bytes)")                          \
3203                                                                             \
3204   product(uintx, MaxMetaspaceSize, max_uintx,                               \
3205           "Maximum size of Metaspaces (in bytes)")                          \
3206                                                                             \
3207   product(uintx, CompressedClassSpaceSize, 1*G,                             \
3208           "Maximum size of class area in Metaspace when compressed "        \
3209           "class pointers are used")                                        \
3210                                                                             \
3211   manageable(uintx, MinHeapFreeRatio, 40,                                   \
3212           "The minimum percentage of heap free after GC to avoid expansion."\
3213           " For most GCs this applies to the old generation. In G1 and"     \
3214           " ParallelGC it applies to the whole heap.")                      \
3215                                                                             \
3216   manageable(uintx, MaxHeapFreeRatio, 70,                                   \
3217           "The maximum percentage of heap free after GC to avoid shrinking."\
3218           " For most GCs this applies to the old generation. In G1 and"     \
3219           " ParallelGC it applies to the whole heap.")                      \
3220                                                                             \
3221   product(intx, SoftRefLRUPolicyMSPerMB, 1000,                              \
3222           "Number of milliseconds per MB of free space in the heap")        \
3223                                                                             \
3224   product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K),                \
3225           "The minimum change in heap space due to GC (in bytes)")          \
3226                                                                             \
3227   product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K),            \
3228           "The minimum expansion of Metaspace (in bytes)")                  \
3229                                                                             \
3230   product(uintx, MinMetaspaceFreeRatio,    40,                              \
3231           "The minimum percentage of Metaspace free after GC to avoid "     \
3232           "expansion")                                                      \
3233                                                                             \
3234   product(uintx, MaxMetaspaceFreeRatio,    70,                              \
3235           "The maximum percentage of Metaspace free after GC to avoid "     \
3236           "shrinking")                                                      \
3237                                                                             \
3238   product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M),              \
3239           "The maximum expansion of Metaspace without full GC (in bytes)")  \
3240                                                                             \
3241   product(uintx, QueuedAllocationWarningCount, 0,                           \
3242           "Number of times an allocation that queues behind a GC "          \
3243           "will retry before printing a warning")                           \
3244                                                                             \
3245   diagnostic(uintx, VerifyGCStartAt,   0,                                   \
3246           "GC invoke count where +VerifyBefore/AfterGC kicks in")           \
3247                                                                             \
3248   diagnostic(intx, VerifyGCLevel,     0,                                    \
3249           "Generation level at which to start +VerifyBefore/AfterGC")       \
3250                                                                             \
3251   product(uintx, MaxTenuringThreshold,    15,                               \
3252           "Maximum value for tenuring threshold")                           \
3253                                                                             \
3254   product(uintx, InitialTenuringThreshold,    7,                            \
3255           "Initial value for tenuring threshold")                           \
3256                                                                             \
3257   product(uintx, TargetSurvivorRatio,    50,                                \
3258           "Desired percentage of survivor space used after scavenge")       \
3259                                                                             \
3260   product(uintx, MarkSweepDeadRatio,     5,                                 \
3261           "Percentage (0-100) of the old gen allowed as dead wood. "        \
3262           "Serial mark sweep treats this as both the minimum and maximum "  \
3263           "value. "                                                         \
3264           "CMS uses this value only if it falls back to mark sweep. "       \
3265           "Par compact uses a variable scale based on the density of the "  \
3266           "generation and treats this as the maximum value when the heap "  \
3267           "is either completely full or completely empty.  Par compact "    \
3268           "also has a smaller default value; see arguments.cpp.")           \
3269                                                                             \
3270   product(uintx, MarkSweepAlwaysCompactCount,     4,                        \
3271           "How often should we fully compact the heap (ignoring the dead "  \
3272           "space parameters)")                                              \
3273                                                                             \
3274   product(intx, PrintCMSStatistics, 0,                                      \
3275           "Statistics for CMS")                                             \
3276                                                                             \
3277   product(bool, PrintCMSInitiationStatistics, false,                        \
3278           "Statistics for initiating a CMS collection")                     \
3279                                                                             \
3280   product(intx, PrintFLSStatistics, 0,                                      \
3281           "Statistics for CMS' FreeListSpace")                              \
3282                                                                             \
3283   product(intx, PrintFLSCensus, 0,                                          \
3284           "Census for CMS' FreeListSpace")                                  \
3285                                                                             \
3286   develop(uintx, GCExpandToAllocateDelayMillis, 0,                          \
3287           "Delay between expansion and allocation (in milliseconds)")       \
3288                                                                             \
3289   develop(uintx, GCWorkerDelayMillis, 0,                                    \
3290           "Delay in scheduling GC workers (in milliseconds)")               \
3291                                                                             \
3292   product(intx, DeferThrSuspendLoopCount,     4000,                         \
3293           "(Unstable) Number of times to iterate in safepoint loop "        \
3294           "before blocking VM threads ")                                    \
3295                                                                             \
3296   product(intx, DeferPollingPageLoopCount,     -1,                          \
3297           "(Unsafe,Unstable) Number of iterations in safepoint loop "       \
3298           "before changing safepoint polling page to RO ")                  \
3299                                                                             \
3300   product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)")               \
3301                                                                             \
3302   product(bool, PSChunkLargeArrays, true,                                   \
3303           "Process large arrays in chunks")                                 \
3304                                                                             \
3305   product(uintx, GCDrainStackTargetSize, 64,                                \
3306           "Number of entries we will try to leave on the stack "            \
3307           "during parallel gc")                                             \
3308                                                                             \
3309   /* stack parameters */                                                    \
3310   product_pd(intx, StackYellowPages,                                        \
3311           "Number of yellow zone (recoverable overflows) pages")            \
3312                                                                             \
3313   product_pd(intx, StackRedPages,                                           \
3314           "Number of red zone (unrecoverable overflows) pages")             \
3315                                                                             \
3316   product_pd(intx, StackShadowPages,                                        \
3317           "Number of shadow zone (for overflow checking) pages "            \
3318           "this should exceed the depth of the VM and native call stack")   \
3319                                                                             \
3320   product_pd(intx, ThreadStackSize,                                         \
3321           "Thread Stack Size (in Kbytes)")                                  \
3322                                                                             \
3323   product_pd(intx, VMThreadStackSize,                                       \
3324           "Non-Java Thread Stack Size (in Kbytes)")                         \
3325                                                                             \
3326   product_pd(intx, CompilerThreadStackSize,                                 \
3327           "Compiler Thread Stack Size (in Kbytes)")                         \
3328                                                                             \
3329   develop_pd(uintx, JVMInvokeMethodSlack,                                   \
3330           "Stack space (bytes) required for JVM_InvokeMethod to complete")  \
3331                                                                             \
3332   product(uintx, ThreadSafetyMargin, 50*M,                                  \
3333           "Thread safety margin is used on fixed-stack LinuxThreads (on "   \
3334           "Linux/x86 only) to prevent heap-stack collision. Set to 0 to "   \
3335           "disable this feature")                                           \
3336                                                                             \
3337   /* code cache parameters */                                               \
3338   /* ppc64/tiered compilation has large code-entry alignment. */            \
3339   develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)),\
3340           "Code cache segment size (in bytes) - smallest unit of "          \
3341           "allocation")                                                     \
3342                                                                             \
3343   develop_pd(intx, CodeEntryAlignment,                                      \
3344           "Code entry alignment for generated code (in bytes)")             \
3345                                                                             \
3346   product_pd(intx, OptoLoopAlignment,                                       \
3347           "Align inner loops to zero relative to this modulus")             \
3348                                                                             \
3349   product_pd(uintx, InitialCodeCacheSize,                                   \
3350           "Initial code cache size (in bytes)")                             \
3351                                                                             \
3352   develop_pd(uintx, CodeCacheMinimumUseSpace,                               \
3353           "Minimum code cache size (in bytes) required to start VM.")       \
3354                                                                             \
3355   product(bool, SegmentedCodeCache, false,                                  \
3356           "Use a segmented code cache")                                     \
3357                                                                             \
3358   product_pd(uintx, ReservedCodeCacheSize,                                  \
3359           "Reserved code cache size (in bytes) - maximum code cache size")  \
3360                                                                             \
3361   product_pd(uintx, NonProfiledCodeHeapSize,                                \
3362           "Size of code heap with non-profiled methods (in bytes)")         \
3363                                                                             \
3364   product_pd(uintx, ProfiledCodeHeapSize,                                   \
3365           "Size of code heap with profiled methods (in bytes)")             \
3366                                                                             \
3367   product_pd(uintx, NonNMethodCodeHeapSize,                                 \
3368           "Size of code heap with non-nmethods (in bytes)")                 \
3369                                                                             \
3370   product_pd(uintx, CodeCacheExpansionSize,                                 \
3371           "Code cache expansion size (in bytes)")                           \
3372                                                                             \
3373   develop_pd(uintx, CodeCacheMinBlockLength,                                \
3374           "Minimum number of segments in a code cache block")               \
3375                                                                             \
3376   notproduct(bool, ExitOnFullCodeCache, false,                              \
3377           "Exit the VM if we fill the code cache")                          \
3378                                                                             \
3379   product(bool, UseCodeCacheFlushing, true,                                 \
3380           "Remove cold/old nmethods from the code cache")                   \
3381                                                                             \
3382   product(uintx, StartAggressiveSweepingAt, 10,                             \
3383           "Start aggressive sweeping if X[%] of the code cache are free."   \
3384           "Segmented code cache: X[%] of the non-profiled heap."            \
3385           "Non-segmented code cache: X[%] of the total code cache")         \
3386                                                                             \
3387   /* interpreter debugging */                                               \
3388   develop(intx, BinarySwitchThreshold, 5,                                   \
3389           "Minimal number of lookupswitch entries for rewriting to binary " \
3390           "switch")                                                         \
3391                                                                             \
3392   develop(intx, StopInterpreterAt, 0,                                       \
3393           "Stop interpreter execution at specified bytecode number")        \
3394                                                                             \
3395   develop(intx, TraceBytecodesAt, 0,                                        \
3396           "Trace bytecodes starting with specified bytecode number")        \
3397                                                                             \
3398   /* compiler interface */                                                  \
3399   develop(intx, CIStart, 0,                                                 \
3400           "The id of the first compilation to permit")                      \
3401                                                                             \
3402   develop(intx, CIStop, max_jint,                                           \
3403           "The id of the last compilation to permit")                       \
3404                                                                             \
3405   develop(intx, CIStartOSR, 0,                                              \
3406           "The id of the first osr compilation to permit "                  \
3407           "(CICountOSR must be on)")                                        \
3408                                                                             \
3409   develop(intx, CIStopOSR, max_jint,                                        \
3410           "The id of the last osr compilation to permit "                   \
3411           "(CICountOSR must be on)")                                        \
3412                                                                             \
3413   develop(intx, CIBreakAtOSR, -1,                                           \
3414           "The id of osr compilation to break at")                          \
3415                                                                             \
3416   develop(intx, CIBreakAt, -1,                                              \
3417           "The id of compilation to break at")                              \
3418                                                                             \
3419   product(ccstrlist, CompileOnly, "",                                       \
3420           "List of methods (pkg/class.name) to restrict compilation to")    \
3421                                                                             \
3422   product(ccstr, CompileCommandFile, NULL,                                  \
3423           "Read compiler commands from this file [.hotspot_compiler]")      \
3424                                                                             \
3425   product(ccstrlist, CompileCommand, "",                                    \
3426           "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3427                                                                             \
3428   develop(bool, ReplayCompiles, false,                                      \
3429           "Enable replay of compilations from ReplayDataFile")              \
3430                                                                             \
3431   product(ccstr, ReplayDataFile, NULL,                                      \
3432           "File containing compilation replay information"                  \
3433           "[default: ./replay_pid%p.log] (%p replaced with pid)")           \
3434                                                                             \
3435    product(ccstr, InlineDataFile, NULL,                                     \
3436           "File containing inlining replay information"                     \
3437           "[default: ./inline_pid%p.log] (%p replaced with pid)")           \
3438                                                                             \
3439   develop(intx, ReplaySuppressInitializers, 2,                              \
3440           "Control handling of class initialization during replay: "        \
3441           "0 - don't do anything special; "                                 \
3442           "1 - treat all class initializers as empty; "                     \
3443           "2 - treat class initializers for application classes as empty; " \
3444           "3 - allow all class initializers to run during bootstrap but "   \
3445           "    pretend they are empty after starting replay")               \
3446                                                                             \
3447   develop(bool, ReplayIgnoreInitErrors, false,                              \
3448           "Ignore exceptions thrown during initialization for replay")      \
3449                                                                             \
3450   product(bool, DumpReplayDataOnError, true,                                \
3451           "Record replay data for crashing compiler threads")               \
3452                                                                             \
3453   product(bool, CICompilerCountPerCPU, false,                               \
3454           "1 compiler thread for log(N CPUs)")                              \
3455                                                                             \
3456   develop(intx, CIFireOOMAt,    -1,                                         \
3457           "Fire OutOfMemoryErrors throughout CI for testing the compiler "  \
3458           "(non-negative value throws OOM after this many CI accesses "     \
3459           "in each compile)")                                               \
3460   notproduct(intx, CICrashAt, -1,                                           \
3461           "id of compilation to trigger assert in compiler thread for "     \
3462           "the purpose of testing, e.g. generation of replay data")         \
3463   notproduct(bool, CIObjectFactoryVerify, false,                            \
3464           "enable potentially expensive verification in ciObjectFactory")   \
3465                                                                             \
3466   /* Priorities */                                                          \
3467   product_pd(bool, UseThreadPriorities,  "Use native thread priorities")    \
3468                                                                             \
3469   product(intx, ThreadPriorityPolicy, 0,                                    \
3470           "0 : Normal.                                                     "\
3471           "    VM chooses priorities that are appropriate for normal       "\
3472           "    applications. On Solaris NORM_PRIORITY and above are mapped "\
3473           "    to normal native priority. Java priorities below "           \
3474           "    NORM_PRIORITY map to lower native priority values. On       "\
3475           "    Windows applications are allowed to use higher native       "\
3476           "    priorities. However, with ThreadPriorityPolicy=0, VM will   "\
3477           "    not use the highest possible native priority,               "\
3478           "    THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with     "\
3479           "    system threads. On Linux thread priorities are ignored      "\
3480           "    because the OS does not support static priority in          "\
3481           "    SCHED_OTHER scheduling class which is the only choice for   "\
3482           "    non-root, non-realtime applications.                        "\
3483           "1 : Aggressive.                                                 "\
3484           "    Java thread priorities map over to the entire range of      "\
3485           "    native thread priorities. Higher Java thread priorities map "\
3486           "    to higher native thread priorities. This policy should be   "\
3487           "    used with care, as sometimes it can cause performance       "\
3488           "    degradation in the application and/or the entire system. On "\
3489           "    Linux this policy requires root privilege.")                 \
3490                                                                             \
3491   product(bool, ThreadPriorityVerbose, false,                               \
3492           "Print priority changes")                                         \
3493                                                                             \
3494   product(intx, DefaultThreadPriority, -1,                                  \
3495           "The native priority at which threads run if not elsewhere "      \
3496           "specified (-1 means no change)")                                 \
3497                                                                             \
3498   product(intx, CompilerThreadPriority, -1,                                 \
3499           "The native priority at which compiler threads should run "       \
3500           "(-1 means no change)")                                           \
3501                                                                             \
3502   product(intx, VMThreadPriority, -1,                                       \
3503           "The native priority at which the VM thread should run "          \
3504           "(-1 means no change)")                                           \
3505                                                                             \
3506   product(bool, CompilerThreadHintNoPreempt, true,                          \
3507           "(Solaris only) Give compiler threads an extra quanta")           \
3508                                                                             \
3509   product(bool, VMThreadHintNoPreempt, false,                               \
3510           "(Solaris only) Give VM thread an extra quanta")                  \
3511                                                                             \
3512   product(intx, JavaPriority1_To_OSPriority, -1,                            \
3513           "Map Java priorities to OS priorities")                           \
3514                                                                             \
3515   product(intx, JavaPriority2_To_OSPriority, -1,                            \
3516           "Map Java priorities to OS priorities")                           \
3517                                                                             \
3518   product(intx, JavaPriority3_To_OSPriority, -1,                            \
3519           "Map Java priorities to OS priorities")                           \
3520                                                                             \
3521   product(intx, JavaPriority4_To_OSPriority, -1,                            \
3522           "Map Java priorities to OS priorities")                           \
3523                                                                             \
3524   product(intx, JavaPriority5_To_OSPriority, -1,                            \
3525           "Map Java priorities to OS priorities")                           \
3526                                                                             \
3527   product(intx, JavaPriority6_To_OSPriority, -1,                            \
3528           "Map Java priorities to OS priorities")                           \
3529                                                                             \
3530   product(intx, JavaPriority7_To_OSPriority, -1,                            \
3531           "Map Java priorities to OS priorities")                           \
3532                                                                             \
3533   product(intx, JavaPriority8_To_OSPriority, -1,                            \
3534           "Map Java priorities to OS priorities")                           \
3535                                                                             \
3536   product(intx, JavaPriority9_To_OSPriority, -1,                            \
3537           "Map Java priorities to OS priorities")                           \
3538                                                                             \
3539   product(intx, JavaPriority10_To_OSPriority,-1,                            \
3540           "Map Java priorities to OS priorities")                           \
3541                                                                             \
3542   experimental(bool, UseCriticalJavaThreadPriority, false,                  \
3543           "Java thread priority 10 maps to critical scheduling priority")   \
3544                                                                             \
3545   experimental(bool, UseCriticalCompilerThreadPriority, false,              \
3546           "Compiler thread(s) run at critical scheduling priority")         \
3547                                                                             \
3548   experimental(bool, UseCriticalCMSThreadPriority, false,                   \
3549           "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3550                                                                             \
3551   /* compiler debugging */                                                  \
3552   notproduct(intx, CompileTheWorldStartAt,     1,                           \
3553           "First class to consider when using +CompileTheWorld")            \
3554                                                                             \
3555   notproduct(intx, CompileTheWorldStopAt, max_jint,                         \
3556           "Last class to consider when using +CompileTheWorld")             \
3557                                                                             \
3558   develop(intx, NewCodeParameter,      0,                                   \
3559           "Testing Only: Create a dedicated integer parameter before "      \
3560           "putback")                                                        \
3561                                                                             \
3562   /* new oopmap storage allocation */                                       \
3563   develop(intx, MinOopMapAllocation,     8,                                 \
3564           "Minimum number of OopMap entries in an OopMapSet")               \
3565                                                                             \
3566   /* Background Compilation */                                              \
3567   develop(intx, LongCompileThreshold,     50,                               \
3568           "Used with +TraceLongCompiles")                                   \
3569                                                                             \
3570   product(intx, StarvationMonitorInterval,    200,                          \
3571           "Pause between each check (in milliseconds)")                     \
3572                                                                             \
3573   /* recompilation */                                                       \
3574   product_pd(intx, CompileThreshold,                                        \
3575           "number of interpreted method invocations before (re-)compiling") \
3576                                                                             \
3577   product(intx, Tier0InvokeNotifyFreqLog, 7,                                \
3578           "Interpreter (tier 0) invocation notification frequency")         \
3579                                                                             \
3580   product(intx, Tier2InvokeNotifyFreqLog, 11,                               \
3581           "C1 without MDO (tier 2) invocation notification frequency")      \
3582                                                                             \
3583   product(intx, Tier3InvokeNotifyFreqLog, 10,                               \
3584           "C1 with MDO profiling (tier 3) invocation notification "         \
3585           "frequency")                                                      \
3586                                                                             \
3587   product(intx, Tier23InlineeNotifyFreqLog, 20,                             \
3588           "Inlinee invocation (tiers 2 and 3) notification frequency")      \
3589                                                                             \
3590   product(intx, Tier0BackedgeNotifyFreqLog, 10,                             \
3591           "Interpreter (tier 0) invocation notification frequency")         \
3592                                                                             \
3593   product(intx, Tier2BackedgeNotifyFreqLog, 14,                             \
3594           "C1 without MDO (tier 2) invocation notification frequency")      \
3595                                                                             \
3596   product(intx, Tier3BackedgeNotifyFreqLog, 13,                             \
3597           "C1 with MDO profiling (tier 3) invocation notification "         \
3598           "frequency")                                                      \
3599                                                                             \
3600   product(intx, Tier2CompileThreshold, 0,                                   \
3601           "threshold at which tier 2 compilation is invoked")               \
3602                                                                             \
3603   product(intx, Tier2BackEdgeThreshold, 0,                                  \
3604           "Back edge threshold at which tier 2 compilation is invoked")     \
3605                                                                             \
3606   product(intx, Tier3InvocationThreshold, 200,                              \
3607           "Compile if number of method invocations crosses this "           \
3608           "threshold")                                                      \
3609                                                                             \
3610   product(intx, Tier3MinInvocationThreshold, 100,                           \
3611           "Minimum invocation to compile at tier 3")                        \
3612                                                                             \
3613   product(intx, Tier3CompileThreshold, 2000,                                \
3614           "Threshold at which tier 3 compilation is invoked (invocation "   \
3615           "minimum must be satisfied")                                      \
3616                                                                             \
3617   product(intx, Tier3BackEdgeThreshold,  60000,                             \
3618           "Back edge threshold at which tier 3 OSR compilation is invoked") \
3619                                                                             \
3620   product(intx, Tier4InvocationThreshold, 5000,                             \
3621           "Compile if number of method invocations crosses this "           \
3622           "threshold")                                                      \
3623                                                                             \
3624   product(intx, Tier4MinInvocationThreshold, 600,                           \
3625           "Minimum invocation to compile at tier 4")                        \
3626                                                                             \
3627   product(intx, Tier4CompileThreshold, 15000,                               \
3628           "Threshold at which tier 4 compilation is invoked (invocation "   \
3629           "minimum must be satisfied")                                      \
3630                                                                             \
3631   product(intx, Tier4BackEdgeThreshold, 40000,                              \
3632           "Back edge threshold at which tier 4 OSR compilation is invoked") \
3633                                                                             \
3634   product(intx, Tier3DelayOn, 5,                                            \
3635           "If C2 queue size grows over this amount per compiler thread "    \
3636           "stop compiling at tier 3 and start compiling at tier 2")         \
3637                                                                             \
3638   product(intx, Tier3DelayOff, 2,                                           \
3639           "If C2 queue size is less than this amount per compiler thread "  \
3640           "allow methods compiled at tier 2 transition to tier 3")          \
3641                                                                             \
3642   product(intx, Tier3LoadFeedback, 5,                                       \
3643           "Tier 3 thresholds will increase twofold when C1 queue size "     \
3644           "reaches this amount per compiler thread")                        \
3645                                                                             \
3646   product(intx, Tier4LoadFeedback, 3,                                       \
3647           "Tier 4 thresholds will increase twofold when C2 queue size "     \
3648           "reaches this amount per compiler thread")                        \
3649                                                                             \
3650   product(intx, TieredCompileTaskTimeout, 50,                               \
3651           "Kill compile task if method was not used within "                \
3652           "given timeout in milliseconds")                                  \
3653                                                                             \
3654   product(intx, TieredStopAtLevel, 4,                                       \
3655           "Stop at given compilation level")                                \
3656                                                                             \
3657   product(intx, Tier0ProfilingStartPercentage, 200,                         \
3658           "Start profiling in interpreter if the counters exceed tier 3 "   \
3659           "thresholds by the specified percentage")                         \
3660                                                                             \
3661   product(uintx, IncreaseFirstTierCompileThresholdAt, 50,                   \
3662           "Increase the compile threshold for C1 compilation if the code "  \
3663           "cache is filled by the specified percentage")                    \
3664                                                                             \
3665   product(intx, TieredRateUpdateMinTime, 1,                                 \
3666           "Minimum rate sampling interval (in milliseconds)")               \
3667                                                                             \
3668   product(intx, TieredRateUpdateMaxTime, 25,                                \
3669           "Maximum rate sampling interval (in milliseconds)")               \
3670                                                                             \
3671   product_pd(bool, TieredCompilation,                                       \
3672           "Enable tiered compilation")                                      \
3673                                                                             \
3674   product(bool, PrintTieredEvents, false,                                   \
3675           "Print tiered events notifications")                              \
3676                                                                             \
3677   product_pd(intx, OnStackReplacePercentage,                                \
3678           "NON_TIERED number of method invocations/branches (expressed as " \
3679           "% of CompileThreshold) before (re-)compiling OSR code")          \
3680                                                                             \
3681   product(intx, InterpreterProfilePercentage, 33,                           \
3682           "NON_TIERED number of method invocations/branches (expressed as " \
3683           "% of CompileThreshold) before profiling in the interpreter")     \
3684                                                                             \
3685   develop(intx, MaxRecompilationSearchLength,    10,                        \
3686           "The maximum number of frames to inspect when searching for "     \
3687           "recompilee")                                                     \
3688                                                                             \
3689   develop(intx, MaxInterpretedSearchLength,     3,                          \
3690           "The maximum number of interpreted frames to skip when searching "\
3691           "for recompilee")                                                 \
3692                                                                             \
3693   develop(intx, DesiredMethodLimit,  8000,                                  \
3694           "The desired maximum method size (in bytecodes) after inlining")  \
3695                                                                             \
3696   develop(intx, HugeMethodLimit,  8000,                                     \
3697           "Don't compile methods larger than this if "                      \
3698           "+DontCompileHugeMethods")                                        \
3699                                                                             \
3700   /* New JDK 1.4 reflection implementation */                               \
3701                                                                             \
3702   develop(intx, FastSuperclassLimit, 8,                                     \
3703           "Depth of hardwired instanceof accelerator array")                \
3704                                                                             \
3705   /* Properties for Java libraries  */                                      \
3706                                                                             \
3707   product(uintx, MaxDirectMemorySize, 0,                                    \
3708           "Maximum total size of NIO direct-buffer allocations")            \
3709                                                                             \
3710   /* Flags used for temporary code during development  */                   \
3711                                                                             \
3712   diagnostic(bool, UseNewCode, false,                                       \
3713           "Testing Only: Use the new version while testing")                \
3714                                                                             \
3715   diagnostic(bool, UseNewCode2, false,                                      \
3716           "Testing Only: Use the new version while testing")                \
3717                                                                             \
3718   diagnostic(bool, UseNewCode3, false,                                      \
3719           "Testing Only: Use the new version while testing")                \
3720                                                                             \
3721   /* flags for performance data collection */                               \
3722                                                                             \
3723   product(bool, UsePerfData, falseInEmbedded,                               \
3724           "Flag to disable jvmstat instrumentation for performance testing "\
3725           "and problem isolation purposes")                                 \
3726                                                                             \
3727   product(bool, PerfDataSaveToFile, false,                                  \
3728           "Save PerfData memory to hsperfdata_<pid> file on exit")          \
3729                                                                             \
3730   product(ccstr, PerfDataSaveFile, NULL,                                    \
3731           "Save PerfData memory to the specified absolute pathname. "       \
3732           "The string %p in the file name (if present) "                    \
3733           "will be replaced by pid")                                        \
3734                                                                             \
3735   product(intx, PerfDataSamplingInterval, 50,                               \
3736           "Data sampling interval (in milliseconds)")                       \
3737                                                                             \
3738   develop(bool, PerfTraceDataCreation, false,                               \
3739           "Trace creation of Performance Data Entries")                     \
3740                                                                             \
3741   develop(bool, PerfTraceMemOps, false,                                     \
3742           "Trace PerfMemory create/attach/detach calls")                    \
3743                                                                             \
3744   product(bool, PerfDisableSharedMem, false,                                \
3745           "Store performance data in standard memory")                      \
3746                                                                             \
3747   product(intx, PerfDataMemorySize, 32*K,                                   \
3748           "Size of performance data memory region. Will be rounded "        \
3749           "up to a multiple of the native os page size.")                   \
3750                                                                             \
3751   product(intx, PerfMaxStringConstLength, 1024,                             \
3752           "Maximum PerfStringConstant string length before truncation")     \
3753                                                                             \
3754   product(bool, PerfAllowAtExitRegistration, false,                         \
3755           "Allow registration of atexit() methods")                         \
3756                                                                             \
3757   product(bool, PerfBypassFileSystemCheck, false,                           \
3758           "Bypass Win32 file system criteria checks (Windows Only)")        \
3759                                                                             \
3760   product(intx, UnguardOnExecutionViolation, 0,                             \
3761           "Unguard page and retry on no-execute fault (Win32 only) "        \
3762           "0=off, 1=conservative, 2=aggressive")                            \
3763                                                                             \
3764   /* Serviceability Support */                                              \
3765                                                                             \
3766   product(bool, ManagementServer, false,                                    \
3767           "Create JMX Management Server")                                   \
3768                                                                             \
3769   product(bool, DisableAttachMechanism, false,                              \
3770           "Disable mechanism that allows tools to attach to this VM")       \
3771                                                                             \
3772   product(bool, StartAttachListener, false,                                 \
3773           "Always start Attach Listener at VM startup")                     \
3774                                                                             \
3775   manageable(bool, PrintConcurrentLocks, false,                             \
3776           "Print java.util.concurrent locks in thread dump")                \
3777                                                                             \
3778   product(bool, TransmitErrorReport, false,                                 \
3779           "Enable error report transmission on erroneous termination")      \
3780                                                                             \
3781   product(ccstr, ErrorReportServer, NULL,                                   \
3782           "Override built-in error report server address")                  \
3783                                                                             \
3784   /* Shared spaces */                                                       \
3785                                                                             \
3786   product(bool, UseSharedSpaces, true,                                      \
3787           "Use shared spaces for metadata")                                 \
3788                                                                             \
3789   product(bool, RequireSharedSpaces, false,                                 \
3790           "Require shared spaces for metadata")                             \
3791                                                                             \
3792   product(bool, DumpSharedSpaces, false,                                    \
3793           "Special mode: JVM reads a class list, loads classes, builds "    \
3794           "shared spaces, and dumps the shared spaces to a file to be "     \
3795           "used in future JVM runs")                                        \
3796                                                                             \
3797   product(bool, PrintSharedSpaces, false,                                   \
3798           "Print usage of shared spaces")                                   \
3799                                                                             \
3800   product(bool, PrintSharedArchiveAndExit, false,                           \
3801           "Print shared archive file contents")                             \
3802                                                                             \
3803   product(bool, PrintSharedDictionary, false,                               \
3804           "If PrintSharedArchiveAndExit is true, also print the shared "    \
3805           "dictionary")                                                     \
3806                                                                             \
3807   product(uintx, SharedReadWriteSize,  NOT_LP64(12*M) LP64_ONLY(16*M),      \
3808           "Size of read-write space for metadata (in bytes)")               \
3809                                                                             \
3810   product(uintx, SharedReadOnlySize,  NOT_LP64(12*M) LP64_ONLY(16*M),       \
3811           "Size of read-only space for metadata (in bytes)")                \
3812                                                                             \
3813   product(uintx, SharedMiscDataSize,    NOT_LP64(2*M) LP64_ONLY(4*M),       \
3814           "Size of the shared miscellaneous data area (in bytes)")          \
3815                                                                             \
3816   product(uintx, SharedMiscCodeSize,    120*K,                              \
3817           "Size of the shared miscellaneous code area (in bytes)")          \
3818                                                                             \
3819   product(uintx, SharedBaseAddress, LP64_ONLY(32*G)                         \
3820           NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)),                           \
3821           "Address to allocate shared memory region for class data")        \
3822                                                                             \
3823   diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false,              \
3824           "Do not quit -Xshare:dump even if we encounter unverifiable "     \
3825           "classes. Just exclude them from the shared dictionary.")         \
3826                                                                             \
3827   diagnostic(bool, PrintMethodHandleStubs, false,                           \
3828           "Print generated stub code for method handles")                   \
3829                                                                             \
3830   develop(bool, TraceMethodHandles, false,                                  \
3831           "trace internal method handle operations")                        \
3832                                                                             \
3833   diagnostic(bool, VerifyMethodHandles, trueInDebug,                        \
3834           "perform extra checks when constructing method handles")          \
3835                                                                             \
3836   diagnostic(bool, ShowHiddenFrames, false,                                 \
3837           "show method handle implementation frames (usually hidden)")      \
3838                                                                             \
3839   experimental(bool, TrustFinalNonStaticFields, false,                      \
3840           "trust final non-static declarations for constant folding")       \
3841                                                                             \
3842   diagnostic(bool, FoldStableValues, true,                                  \
3843           "Optimize loads from stable fields (marked w/ @Stable)")          \
3844                                                                             \
3845   develop(bool, TraceInvokeDynamic, false,                                  \
3846           "trace internal invoke dynamic operations")                       \
3847                                                                             \
3848   diagnostic(bool, PauseAtStartup,      false,                              \
3849           "Causes the VM to pause at startup time and wait for the pause "  \
3850           "file to be removed (default: ./vm.paused.<pid>)")                \
3851                                                                             \
3852   diagnostic(ccstr, PauseAtStartupFile, NULL,                               \
3853           "The file to create and for whose removal to await when pausing " \
3854           "at startup. (default: ./vm.paused.<pid>)")                       \
3855                                                                             \
3856   diagnostic(bool, PauseAtExit, false,                                      \
3857           "Pause and wait for keypress on exit if a debugger is attached")  \
3858                                                                             \
3859   product(bool, ExtendedDTraceProbes,    false,                             \
3860           "Enable performance-impacting dtrace probes")                     \
3861                                                                             \
3862   product(bool, DTraceMethodProbes, false,                                  \
3863           "Enable dtrace probes for method-entry and method-exit")          \
3864                                                                             \
3865   product(bool, DTraceAllocProbes, false,                                   \
3866           "Enable dtrace probes for object allocation")                     \
3867                                                                             \
3868   product(bool, DTraceMonitorProbes, false,                                 \
3869           "Enable dtrace probes for monitor events")                        \
3870                                                                             \
3871   product(bool, RelaxAccessControlCheck, false,                             \
3872           "Relax the access control checks in the verifier")                \
3873                                                                             \
3874   diagnostic(bool, PrintDTraceDOF, false,                                   \
3875           "Print the DTrace DOF passed to the system for JSDT probes")      \
3876                                                                             \
3877   product(uintx, StringTableSize, defaultStringTableSize,                   \
3878           "Number of buckets in the interned String table")                 \
3879                                                                             \
3880   experimental(uintx, SymbolTableSize, defaultSymbolTableSize,              \
3881           "Number of buckets in the JVM internal Symbol table")             \
3882                                                                             \
3883   product(bool, UseStringDeduplication, false,                              \
3884           "Use string deduplication")                                       \
3885                                                                             \
3886   product(bool, PrintStringDeduplicationStatistics, false,                  \
3887           "Print string deduplication statistics")                          \
3888                                                                             \
3889   product(uintx, StringDeduplicationAgeThreshold, 3,                        \
3890           "A string must reach this age (or be promoted to an old region) " \
3891           "to be considered for deduplication")                             \
3892                                                                             \
3893   diagnostic(bool, StringDeduplicationResizeALot, false,                    \
3894           "Force table resize every time the table is scanned")             \
3895                                                                             \
3896   diagnostic(bool, StringDeduplicationRehashALot, false,                    \
3897           "Force table rehash every time the table is scanned")             \
3898                                                                             \
3899   develop(bool, TraceDefaultMethods, false,                                 \
3900           "Trace the default method processing steps")                      \
3901                                                                             \
3902   develop(bool, VerifyGenericSignatures, false,                             \
3903           "Abort VM on erroneous or inconsistent generic signatures")       \
3904                                                                             \
3905   diagnostic(bool, WhiteBoxAPI, false,                                      \
3906           "Enable internal testing APIs")                                   \
3907                                                                             \
3908   product(bool, PrintGCCause, true,                                         \
3909           "Include GC cause in GC logging")                                 \
3910                                                                             \
3911   experimental(intx, SurvivorAlignmentInBytes, 0,                           \
3912            "Default survivor space alignment in bytes")                     \
3913                                                                             \
3914   product(bool , AllowNonVirtualCalls, false,                               \
3915           "Obey the ACC_SUPER flag and allow invokenonvirtual calls")       \
3916                                                                             \
3917   product(ccstr, DumpLoadedClassList, NULL,                                 \
3918           "Dump the names all loaded classes, that could be stored into "   \
3919           "the CDS archive, in the specified file")                         \
3920                                                                             \
3921   product(ccstr, SharedClassListFile, NULL,                                 \
3922           "Override the default CDS class list")                            \
3923                                                                             \
3924   diagnostic(ccstr, SharedArchiveFile, NULL,                                \
3925           "Override the default location of the CDS archive file")          \
3926                                                                             \
3927   product(ccstr, ExtraSharedClassListFile, NULL,                            \
3928           "Extra classlist for building the CDS archive file")              \
3929                                                                             \
3930   experimental(size_t, ArrayAllocatorMallocLimit,                           \
3931           SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1),                       \
3932           "Allocation less than this value will be allocated "              \
3933           "using malloc. Larger allocations will use mmap.")                \
3934                                                                             \
3935   experimental(bool, AlwaysAtomicAccesses, false,                           \
3936           "Accesses to all variables should always be atomic")              \
3937                                                                             \
3938   product(bool, EnableTracing, false,                                       \
3939           "Enable event-based tracing")                                     \
3940                                                                             \
3941   product(bool, UseLockedTracing, false,                                    \
3942           "Use locked-tracing when doing event-based tracing")
3943 
3944 /*
3945  *  Macros for factoring of globals
3946  */
3947 
3948 // Interface macros
3949 #define DECLARE_PRODUCT_FLAG(type, name, value, doc)      extern "C" type name;
3950 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc)          extern "C" type name;
3951 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc)   extern "C" type name;
3952 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3953 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc)   extern "C" type name;
3954 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc)   extern "C" type name;
3955 #ifdef PRODUCT
3956 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type CONST_##name; const type name = value;
3957 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type CONST_##name; const type name = pd_##name;
3958 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type CONST_##name;
3959 #else
3960 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type name;
3961 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type name;
3962 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type name;
3963 #endif
3964 // Special LP64 flags, product only needed for now.
3965 #ifdef _LP64
3966 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3967 #else
3968 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3969 #endif // _LP64
3970 
3971 // Implementation macros
3972 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc)      type name = value;
3973 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc)          type name = pd_##name;
3974 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc)   type name = value;
3975 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3976 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc)   type name = value;
3977 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc)   type name = value;
3978 #ifdef PRODUCT
3979 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type CONST_##name = value;
3980 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type CONST_##name = pd_##name;
3981 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type CONST_##name = value;
3982 #else
3983 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type name = value;
3984 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type name = pd_##name;
3985 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type name = value;
3986 #endif
3987 #ifdef _LP64
3988 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3989 #else
3990 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3991 #endif // _LP64
3992 
3993 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)
3994 
3995 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3996 
3997 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
3998 
3999 // Extensions
4000 
4001 #include "runtime/globals_ext.hpp"
4002 
4003 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP