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 unlock_diagnostic();
 324 
 325   void get_locked_message(char*, int) const;
 326   void get_locked_message_ext(char*, int) const;
 327 
 328   void print_on(outputStream* st, bool withComments = false );
 329   void print_kind(outputStream* st);
 330   void print_as_flag(outputStream* st);
 331 };
 332 
 333 // debug flags control various aspects of the VM and are global accessible
 334 
 335 // use FlagSetting to temporarily change some debug flag
 336 // e.g. FlagSetting fs(DebugThisAndThat, true);
 337 // restored to previous value upon leaving scope
 338 class FlagSetting {
 339   bool val;
 340   bool* flag;
 341  public:
 342   FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
 343   ~FlagSetting()                       { *flag = val; }
 344 };
 345 
 346 
 347 class CounterSetting {
 348   intx* counter;
 349  public:
 350   CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
 351   ~CounterSetting()         { (*counter)--; }
 352 };
 353 
 354 
 355 class UIntFlagSetting {
 356   uintx val;
 357   uintx* flag;
 358  public:
 359   UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
 360   ~UIntFlagSetting()                         { *flag = val; }
 361 };
 362 
 363 class DoubleFlagSetting {
 364   double val;
 365   double* flag;
 366  public:
 367   DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
 368   ~DoubleFlagSetting()                           { *flag = val; }
 369 };
 370 
 371 class SizeTFlagSetting {
 372   size_t val;
 373   size_t* flag;
 374  public:
 375   SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; }
 376   ~SizeTFlagSetting()                           { *flag = val; }
 377 };
 378 
 379 
 380 class CommandLineFlags {
 381  public:
 382   static bool boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false);
 383   static bool boolAt(const char* name, bool* value, bool allow_locked = false, bool return_flag = false)      { return boolAt(name, strlen(name), value, allow_locked, return_flag); }
 384   static bool boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin);
 385   static bool boolAtPut(const char* name, bool* value, Flag::Flags origin)   { return boolAtPut(name, strlen(name), value, origin); }
 386 
 387   static bool intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false);
 388   static bool intxAt(const char* name, intx* value, bool allow_locked = false, bool return_flag = false)      { return intxAt(name, strlen(name), value, allow_locked, return_flag); }
 389   static bool intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin);
 390   static bool intxAtPut(const char* name, intx* value, Flag::Flags origin)   { return intxAtPut(name, strlen(name), value, origin); }
 391 
 392   static bool uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false);
 393   static bool uintxAt(const char* name, uintx* value, bool allow_locked = false, bool return_flag = false)    { return uintxAt(name, strlen(name), value, allow_locked, return_flag); }
 394   static bool uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin);
 395   static bool uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
 396 
 397   static bool size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false);
 398   static bool size_tAt(const char* name, size_t* value, bool allow_locked = false, bool return_flag = false)    { return size_tAt(name, strlen(name), value, allow_locked, return_flag); }
 399   static bool size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin);
 400   static bool size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); }
 401 
 402   static bool uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false);
 403   static bool uint64_tAt(const char* name, uint64_t* value, bool allow_locked = false, bool return_flag = false) { return uint64_tAt(name, strlen(name), value, allow_locked, return_flag); }
 404   static bool uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin);
 405   static bool uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
 406 
 407   static bool doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false);
 408   static bool doubleAt(const char* name, double* value, bool allow_locked = false, bool return_flag = false)    { return doubleAt(name, strlen(name), value, allow_locked, return_flag); }
 409   static bool doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin);
 410   static bool doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
 411 
 412   static bool ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false);
 413   static bool ccstrAt(const char* name, ccstr* value, bool allow_locked = false, bool return_flag = false)    { return ccstrAt(name, strlen(name), value, allow_locked, return_flag); }
 414   // Contract:  Flag will make private copy of the incoming value.
 415   // Outgoing value is always malloc-ed, and caller MUST call free.
 416   static bool ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin);
 417   static bool ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
 418 
 419   // Returns false if name is not a command line flag.
 420   static bool wasSetOnCmdline(const char* name, bool* value);
 421   static void printSetFlags(outputStream* out);
 422 
 423   static void printFlags(outputStream* out, bool withComments);
 424 
 425   static void verify() PRODUCT_RETURN;
 426 };
 427 
 428 // use this for flags that are true by default in the debug version but
 429 // false in the optimized version, and vice versa
 430 #ifdef ASSERT
 431 #define trueInDebug  true
 432 #define falseInDebug false
 433 #else
 434 #define trueInDebug  false
 435 #define falseInDebug true
 436 #endif
 437 
 438 // use this for flags that are true per default in the product build
 439 // but false in development builds, and vice versa
 440 #ifdef PRODUCT
 441 #define trueInProduct  true
 442 #define falseInProduct false
 443 #else
 444 #define trueInProduct  false
 445 #define falseInProduct true
 446 #endif
 447 
 448 #ifdef JAVASE_EMBEDDED
 449 #define falseInEmbedded false
 450 #else
 451 #define falseInEmbedded true
 452 #endif
 453 
 454 // develop flags are settable / visible only during development and are constant in the PRODUCT version
 455 // product flags are always settable / visible
 456 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
 457 
 458 // A flag must be declared with one of the following types:
 459 // bool, intx, uintx, ccstr, double, or uint64_t.
 460 // The type "ccstr" is an alias for "const char*" and is used
 461 // only in this file, because the macrology requires single-token type names.
 462 
 463 // Note: Diagnostic options not meant for VM tuning or for product modes.
 464 // They are to be used for VM quality assurance or field diagnosis
 465 // of VM bugs.  They are hidden so that users will not be encouraged to
 466 // try them as if they were VM ordinary execution options.  However, they
 467 // are available in the product version of the VM.  Under instruction
 468 // from support engineers, VM customers can turn them on to collect
 469 // diagnostic information about VM problems.  To use a VM diagnostic
 470 // option, you must first specify +UnlockDiagnosticVMOptions.
 471 // (This master switch also affects the behavior of -Xprintflags.)
 472 //
 473 // experimental flags are in support of features that are not
 474 //    part of the officially supported product, but are available
 475 //    for experimenting with. They could, for example, be performance
 476 //    features that may not have undergone full or rigorous QA, but which may
 477 //    help performance in some cases and released for experimentation
 478 //    by the community of users and developers. This flag also allows one to
 479 //    be able to build a fully supported product that nonetheless also
 480 //    ships with some unsupported, lightly tested, experimental features.
 481 //    Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
 482 //    UnlockExperimentalVMOptions flag, which allows the control and
 483 //    modification of the experimental flags.
 484 //
 485 // Nota bene: neither diagnostic nor experimental options should be used casually,
 486 //    and they are not supported on production loads, except under explicit
 487 //    direction from support engineers.
 488 //
 489 // manageable flags are writeable external product flags.
 490 //    They are dynamically writeable through the JDK management interface
 491 //    (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
 492 //    These flags are external exported interface (see CCC).  The list of
 493 //    manageable flags can be queried programmatically through the management
 494 //    interface.
 495 //
 496 //    A flag can be made as "manageable" only if
 497 //    - the flag is defined in a CCC as an external exported interface.
 498 //    - the VM implementation supports dynamic setting of the flag.
 499 //      This implies that the VM must *always* query the flag variable
 500 //      and not reuse state related to the flag state at any given time.
 501 //    - you want the flag to be queried programmatically by the customers.
 502 //
 503 // product_rw flags are writeable internal product flags.
 504 //    They are like "manageable" flags but for internal/private use.
 505 //    The list of product_rw flags are internal/private flags which
 506 //    may be changed/removed in a future release.  It can be set
 507 //    through the management interface to get/set value
 508 //    when the name of flag is supplied.
 509 //
 510 //    A flag can be made as "product_rw" only if
 511 //    - the VM implementation supports dynamic setting of the flag.
 512 //      This implies that the VM must *always* query the flag variable
 513 //      and not reuse state related to the flag state at any given time.
 514 //
 515 // Note that when there is a need to support develop flags to be writeable,
 516 // it can be done in the same way as product_rw.
 517 
 518 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
 519                                                                             \
 520   lp64_product(bool, UseCompressedOops, false,                              \
 521           "Use 32-bit object references in 64-bit VM. "                     \
 522           "lp64_product means flag is always constant in 32 bit VM")        \
 523                                                                             \
 524   lp64_product(bool, UseCompressedClassPointers, false,                     \
 525           "Use 32-bit class pointers in 64-bit VM. "                        \
 526           "lp64_product means flag is always constant in 32 bit VM")        \
 527                                                                             \
 528   notproduct(bool, CheckCompressedOops, true,                               \
 529           "Generate checks in encoding/decoding code in debug VM")          \
 530                                                                             \
 531   product_pd(uintx, HeapBaseMinAddress,                                     \
 532           "OS specific low limit for heap base address")                    \
 533                                                                             \
 534   diagnostic(bool, PrintCompressedOopsMode, false,                          \
 535           "Print compressed oops base address and encoding mode")           \
 536                                                                             \
 537   lp64_product(intx, ObjectAlignmentInBytes, 8,                             \
 538           "Default object alignment in bytes, 8 is minimum")                \
 539                                                                             \
 540   product(bool, AssumeMP, false,                                            \
 541           "Instruct the VM to assume multiple processors are available")    \
 542                                                                             \
 543   /* UseMembar is theoretically a temp flag used for memory barrier         \
 544    * removal testing.  It was supposed to be removed before FCS but has     \
 545    * been re-added (see 6401008) */                                         \
 546   product_pd(bool, UseMembar,                                               \
 547           "(Unstable) Issues membars on thread state transitions")          \
 548                                                                             \
 549   develop(bool, CleanChunkPoolAsync, falseInEmbedded,                       \
 550           "Clean the chunk pool asynchronously")                            \
 551                                                                             \
 552   experimental(bool, AlwaysSafeConstructors, false,                         \
 553           "Force safe construction, as if all fields are final.")           \
 554                                                                             \
 555   /* Temporary: See 6948537 */                                              \
 556   experimental(bool, UseMemSetInBOT, true,                                  \
 557           "(Unstable) uses memset in BOT updates in GC code")               \
 558                                                                             \
 559   diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug,                  \
 560           "Enable normal processing of flags relating to field diagnostics")\
 561                                                                             \
 562   experimental(bool, UnlockExperimentalVMOptions, false,                    \
 563           "Enable normal processing of flags relating to experimental "     \
 564           "features")                                                       \
 565                                                                             \
 566   product(bool, JavaMonitorsInStackTrace, true,                             \
 567           "Print information about Java monitor locks when the stacks are"  \
 568           "dumped")                                                         \
 569                                                                             \
 570   product_pd(bool, UseLargePages,                                           \
 571           "Use large page memory")                                          \
 572                                                                             \
 573   product_pd(bool, UseLargePagesIndividualAllocation,                       \
 574           "Allocate large pages individually for better affinity")          \
 575                                                                             \
 576   develop(bool, LargePagesIndividualAllocationInjectError, false,           \
 577           "Fail large pages individual allocation")                         \
 578                                                                             \
 579   product(bool, UseLargePagesInMetaspace, false,                            \
 580           "Use large page memory in metaspace. "                            \
 581           "Only used if UseLargePages is enabled.")                         \
 582                                                                             \
 583   develop(bool, TracePageSizes, false,                                      \
 584           "Trace page size selection and usage")                            \
 585                                                                             \
 586   product(bool, UseNUMA, false,                                             \
 587           "Use NUMA if available")                                          \
 588                                                                             \
 589   product(bool, UseNUMAInterleaving, false,                                 \
 590           "Interleave memory across NUMA nodes if available")               \
 591                                                                             \
 592   product(uintx, NUMAInterleaveGranularity, 2*M,                            \
 593           "Granularity to use for NUMA interleaving on Windows OS")         \
 594                                                                             \
 595   product(bool, ForceNUMA, false,                                           \
 596           "Force NUMA optimizations on single-node/UMA systems")            \
 597                                                                             \
 598   product(uintx, NUMAChunkResizeWeight, 20,                                 \
 599           "Percentage (0-100) used to weight the current sample when "      \
 600           "computing exponentially decaying average for "                   \
 601           "AdaptiveNUMAChunkSizing")                                        \
 602                                                                             \
 603   product(uintx, NUMASpaceResizeRate, 1*G,                                  \
 604           "Do not reallocate more than this amount per collection")         \
 605                                                                             \
 606   product(bool, UseAdaptiveNUMAChunkSizing, true,                           \
 607           "Enable adaptive chunk sizing for NUMA")                          \
 608                                                                             \
 609   product(bool, NUMAStats, false,                                           \
 610           "Print NUMA stats in detailed heap information")                  \
 611                                                                             \
 612   product(uintx, NUMAPageScanRate, 256,                                     \
 613           "Maximum number of pages to include in the page scan procedure")  \
 614                                                                             \
 615   product_pd(bool, NeedsDeoptSuspend,                                       \
 616           "True for register window machines (sparc/ia64)")                 \
 617                                                                             \
 618   product(intx, UseSSE, 99,                                                 \
 619           "Highest supported SSE instructions set on x86/x64")              \
 620                                                                             \
 621   product(bool, UseAES, false,                                              \
 622           "Control whether AES instructions can be used on x86/x64")        \
 623                                                                             \
 624   product(bool, UseSHA, false,                                              \
 625           "Control whether SHA instructions can be used on SPARC")          \
 626                                                                             \
 627   product(uintx, LargePageSizeInBytes, 0,                                   \
 628           "Large page size (0 to let VM choose the page size)")             \
 629                                                                             \
 630   product(uintx, LargePageHeapSizeThreshold, 128*M,                         \
 631           "Use large pages if maximum heap is at least this big")           \
 632                                                                             \
 633   product(bool, ForceTimeHighResolution, false,                             \
 634           "Using high time resolution (for Win32 only)")                    \
 635                                                                             \
 636   develop(bool, TraceItables, false,                                        \
 637           "Trace initialization and use of itables")                        \
 638                                                                             \
 639   develop(bool, TracePcPatching, false,                                     \
 640           "Trace usage of frame::patch_pc")                                 \
 641                                                                             \
 642   develop(bool, TraceJumps, false,                                          \
 643           "Trace assembly jumps in thread ring buffer")                     \
 644                                                                             \
 645   develop(bool, TraceRelocator, false,                                      \
 646           "Trace the bytecode relocator")                                   \
 647                                                                             \
 648   develop(bool, TraceLongCompiles, false,                                   \
 649           "Print out every time compilation is longer than "                \
 650           "a given threshold")                                              \
 651                                                                             \
 652   develop(bool, SafepointALot, false,                                       \
 653           "Generate a lot of safepoints. This works with "                  \
 654           "GuaranteedSafepointInterval")                                    \
 655                                                                             \
 656   product_pd(bool, BackgroundCompilation,                                   \
 657           "A thread requesting compilation is not blocked during "          \
 658           "compilation")                                                    \
 659                                                                             \
 660   product(bool, PrintVMQWaitTime, false,                                    \
 661           "Print out the waiting time in VM operation queue")               \
 662                                                                             \
 663   develop(bool, NoYieldsInMicrolock, false,                                 \
 664           "Disable yields in microlock")                                    \
 665                                                                             \
 666   develop(bool, TraceOopMapGeneration, false,                               \
 667           "Show OopMapGeneration")                                          \
 668                                                                             \
 669   product(bool, MethodFlushing, true,                                       \
 670           "Reclamation of zombie and not-entrant methods")                  \
 671                                                                             \
 672   develop(bool, VerifyStack, false,                                         \
 673           "Verify stack of each thread when it is entering a runtime call") \
 674                                                                             \
 675   diagnostic(bool, ForceUnreachable, false,                                 \
 676           "Make all non code cache addresses to be unreachable by "         \
 677           "forcing use of 64bit literal fixups")                            \
 678                                                                             \
 679   notproduct(bool, StressDerivedPointers, false,                            \
 680           "Force scavenge when a derived pointer is detected on stack "     \
 681           "after rtm call")                                                 \
 682                                                                             \
 683   develop(bool, TraceDerivedPointers, false,                                \
 684           "Trace traversal of derived pointers on stack")                   \
 685                                                                             \
 686   notproduct(bool, TraceCodeBlobStacks, false,                              \
 687           "Trace stack-walk of codeblobs")                                  \
 688                                                                             \
 689   product(bool, PrintJNIResolving, false,                                   \
 690           "Used to implement -v:jni")                                       \
 691                                                                             \
 692   notproduct(bool, PrintRewrites, false,                                    \
 693           "Print methods that are being rewritten")                         \
 694                                                                             \
 695   product(bool, UseInlineCaches, true,                                      \
 696           "Use Inline Caches for virtual calls ")                           \
 697                                                                             \
 698   develop(bool, InlineArrayCopy, true,                                      \
 699           "Inline arraycopy native that is known to be part of "            \
 700           "base library DLL")                                               \
 701                                                                             \
 702   develop(bool, InlineObjectHash, true,                                     \
 703           "Inline Object::hashCode() native that is known to be part "      \
 704           "of base library DLL")                                            \
 705                                                                             \
 706   develop(bool, InlineNatives, true,                                        \
 707           "Inline natives that are known to be part of base library DLL")   \
 708                                                                             \
 709   develop(bool, InlineMathNatives, true,                                    \
 710           "Inline SinD, CosD, etc.")                                        \
 711                                                                             \
 712   develop(bool, InlineClassNatives, true,                                   \
 713           "Inline Class.isInstance, etc")                                   \
 714                                                                             \
 715   develop(bool, InlineThreadNatives, true,                                  \
 716           "Inline Thread.currentThread, etc")                               \
 717                                                                             \
 718   develop(bool, InlineUnsafeOps, true,                                      \
 719           "Inline memory ops (native methods) from sun.misc.Unsafe")        \
 720                                                                             \
 721   product(bool, CriticalJNINatives, true,                                   \
 722           "Check for critical JNI entry points")                            \
 723                                                                             \
 724   notproduct(bool, StressCriticalJNINatives, false,                         \
 725           "Exercise register saving code in critical natives")              \
 726                                                                             \
 727   product(bool, UseSSE42Intrinsics, false,                                  \
 728           "SSE4.2 versions of intrinsics")                                  \
 729                                                                             \
 730   product(bool, UseAESIntrinsics, false,                                    \
 731           "Use intrinsics for AES versions of crypto")                      \
 732                                                                             \
 733   product(bool, UseSHA1Intrinsics, false,                                   \
 734           "Use intrinsics for SHA-1 crypto hash function")                  \
 735                                                                             \
 736   product(bool, UseSHA256Intrinsics, false,                                 \
 737           "Use intrinsics for SHA-224 and SHA-256 crypto hash functions")   \
 738                                                                             \
 739   product(bool, UseSHA512Intrinsics, false,                                 \
 740           "Use intrinsics for SHA-384 and SHA-512 crypto hash functions")   \
 741                                                                             \
 742   product(bool, UseCRC32Intrinsics, false,                                  \
 743           "use intrinsics for java.util.zip.CRC32")                         \
 744                                                                             \
 745   develop(bool, TraceCallFixup, false,                                      \
 746           "Trace all call fixups")                                          \
 747                                                                             \
 748   develop(bool, DeoptimizeALot, false,                                      \
 749           "Deoptimize at every exit from the runtime system")               \
 750                                                                             \
 751   notproduct(ccstrlist, DeoptimizeOnlyAt, "",                               \
 752           "A comma separated list of bcis to deoptimize at")                \
 753                                                                             \
 754   product(bool, DeoptimizeRandom, false,                                    \
 755           "Deoptimize random frames on random exit from the runtime system")\
 756                                                                             \
 757   notproduct(bool, ZombieALot, false,                                       \
 758           "Create zombies (non-entrant) at exit from the runtime system")   \
 759                                                                             \
 760   product(bool, UnlinkSymbolsALot, false,                                   \
 761           "Unlink unreferenced symbols from the symbol table at safepoints")\
 762                                                                             \
 763   notproduct(bool, WalkStackALot, false,                                    \
 764           "Trace stack (no print) at every exit from the runtime system")   \
 765                                                                             \
 766   product(bool, Debugging, false,                                           \
 767           "Set when executing debug methods in debug.cpp "                  \
 768           "(to prevent triggering assertions)")                             \
 769                                                                             \
 770   notproduct(bool, StrictSafepointChecks, trueInDebug,                      \
 771           "Enable strict checks that safepoints cannot happen for threads " \
 772           "that use No_Safepoint_Verifier")                                 \
 773                                                                             \
 774   notproduct(bool, VerifyLastFrame, false,                                  \
 775           "Verify oops on last frame on entry to VM")                       \
 776                                                                             \
 777   develop(bool, TraceHandleAllocation, false,                               \
 778           "Print out warnings when suspiciously many handles are allocated")\
 779                                                                             \
 780   product(bool, UseCompilerSafepoints, true,                                \
 781           "Stop at safepoints in compiled code")                            \
 782                                                                             \
 783   product(bool, FailOverToOldVerifier, true,                                \
 784           "Fail over to old verifier when split verifier fails")            \
 785                                                                             \
 786   develop(bool, ShowSafepointMsgs, false,                                   \
 787           "Show message about safepoint synchronization")                   \
 788                                                                             \
 789   product(bool, SafepointTimeout, false,                                    \
 790           "Time out and warn or fail after SafepointTimeoutDelay "          \
 791           "milliseconds if failed to reach safepoint")                      \
 792                                                                             \
 793   develop(bool, DieOnSafepointTimeout, false,                               \
 794           "Die upon failure to reach safepoint (see SafepointTimeout)")     \
 795                                                                             \
 796   /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */      \
 797   /* typically, at most a few retries are needed */                         \
 798   product(intx, SuspendRetryCount, 50,                                      \
 799           "Maximum retry count for an external suspend request")            \
 800                                                                             \
 801   product(intx, SuspendRetryDelay, 5,                                       \
 802           "Milliseconds to delay per retry (* current_retry_count)")        \
 803                                                                             \
 804   product(bool, AssertOnSuspendWaitFailure, false,                          \
 805           "Assert/Guarantee on external suspend wait failure")              \
 806                                                                             \
 807   product(bool, TraceSuspendWaitFailures, false,                            \
 808           "Trace external suspend wait failures")                           \
 809                                                                             \
 810   product(bool, MaxFDLimit, true,                                           \
 811           "Bump the number of file descriptors to maximum in Solaris")      \
 812                                                                             \
 813   diagnostic(bool, LogEvents, true,                                         \
 814           "Enable the various ring buffer event logs")                      \
 815                                                                             \
 816   diagnostic(uintx, LogEventsBufferEntries, 10,                             \
 817           "Number of ring buffer event logs")                               \
 818                                                                             \
 819   product(bool, BytecodeVerificationRemote, true,                           \
 820           "Enable the Java bytecode verifier for remote classes")           \
 821                                                                             \
 822   product(bool, BytecodeVerificationLocal, false,                           \
 823           "Enable the Java bytecode verifier for local classes")            \
 824                                                                             \
 825   develop(bool, ForceFloatExceptions, trueInDebug,                          \
 826           "Force exceptions on FP stack under/overflow")                    \
 827                                                                             \
 828   develop(bool, VerifyStackAtCalls, false,                                  \
 829           "Verify that the stack pointer is unchanged after calls")         \
 830                                                                             \
 831   develop(bool, TraceJavaAssertions, false,                                 \
 832           "Trace java language assertions")                                 \
 833                                                                             \
 834   notproduct(bool, CheckAssertionStatusDirectives, false,                   \
 835           "Temporary - see javaClasses.cpp")                                \
 836                                                                             \
 837   notproduct(bool, PrintMallocFree, false,                                  \
 838           "Trace calls to C heap malloc/free allocation")                   \
 839                                                                             \
 840   product(bool, PrintOopAddress, false,                                     \
 841           "Always print the location of the oop")                           \
 842                                                                             \
 843   notproduct(bool, VerifyCodeCache, false,                                  \
 844           "Verify code cache on memory allocation/deallocation")            \
 845                                                                             \
 846   develop(bool, ZapDeadCompiledLocals, false,                               \
 847           "Zap dead locals in compiler frames")                             \
 848                                                                             \
 849   notproduct(bool, ZapDeadLocalsOld, false,                                 \
 850           "Zap dead locals (old version, zaps all frames when "             \
 851           "entering the VM")                                                \
 852                                                                             \
 853   notproduct(bool, CheckOopishValues, false,                                \
 854           "Warn if value contains oop (requires ZapDeadLocals)")            \
 855                                                                             \
 856   develop(bool, UseMallocOnly, false,                                       \
 857           "Use only malloc/free for allocation (no resource area/arena)")   \
 858                                                                             \
 859   develop(bool, PrintMalloc, false,                                         \
 860           "Print all malloc/free calls")                                    \
 861                                                                             \
 862   develop(bool, PrintMallocStatistics, false,                               \
 863           "Print malloc/free statistics")                                   \
 864                                                                             \
 865   develop(bool, ZapResourceArea, trueInDebug,                               \
 866           "Zap freed resource/arena space with 0xABABABAB")                 \
 867                                                                             \
 868   notproduct(bool, ZapVMHandleArea, trueInDebug,                            \
 869           "Zap freed VM handle space with 0xBCBCBCBC")                      \
 870                                                                             \
 871   develop(bool, ZapJNIHandleArea, trueInDebug,                              \
 872           "Zap freed JNI handle space with 0xFEFEFEFE")                     \
 873                                                                             \
 874   notproduct(bool, ZapStackSegments, trueInDebug,                           \
 875           "Zap allocated/freed stack segments with 0xFADFADED")             \
 876                                                                             \
 877   develop(bool, ZapUnusedHeapArea, trueInDebug,                             \
 878           "Zap unused heap space with 0xBAADBABE")                          \
 879                                                                             \
 880   develop(bool, TraceZapUnusedHeapArea, false,                              \
 881           "Trace zapping of unused heap space")                             \
 882                                                                             \
 883   develop(bool, CheckZapUnusedHeapArea, false,                              \
 884           "Check zapping of unused heap space")                             \
 885                                                                             \
 886   develop(bool, ZapFillerObjects, trueInDebug,                              \
 887           "Zap filler objects with 0xDEAFBABE")                             \
 888                                                                             \
 889   develop(bool, PrintVMMessages, true,                                      \
 890           "Print VM messages on console")                                   \
 891                                                                             \
 892   product(bool, PrintGCApplicationConcurrentTime, false,                    \
 893           "Print the time the application has been running")                \
 894                                                                             \
 895   product(bool, PrintGCApplicationStoppedTime, false,                       \
 896           "Print the time the application has been stopped")                \
 897                                                                             \
 898   diagnostic(bool, VerboseVerification, false,                              \
 899           "Display detailed verification details")                          \
 900                                                                             \
 901   notproduct(uintx, ErrorHandlerTest, 0,                                    \
 902           "If > 0, provokes an error after VM initialization; the value "   \
 903           "determines which error to provoke. See test_error_handler() "    \
 904           "in debug.cpp.")                                                  \
 905                                                                             \
 906   develop(bool, Verbose, false,                                             \
 907           "Print additional debugging information from other modes")        \
 908                                                                             \
 909   develop(bool, PrintMiscellaneous, false,                                  \
 910           "Print uncategorized debugging information (requires +Verbose)")  \
 911                                                                             \
 912   develop(bool, WizardMode, false,                                          \
 913           "Print much more debugging information")                          \
 914                                                                             \
 915   product(bool, ShowMessageBoxOnError, false,                               \
 916           "Keep process alive on VM fatal error")                           \
 917                                                                             \
 918   product(bool, CreateMinidumpOnCrash, false,                               \
 919           "Create minidump on VM fatal error")                              \
 920                                                                             \
 921   product_pd(bool, UseOSErrorReporting,                                     \
 922           "Let VM fatal error propagate to the OS (ie. WER on Windows)")    \
 923                                                                             \
 924   product(bool, SuppressFatalErrorMessage, false,                           \
 925           "Report NO fatal error message (avoid deadlock)")                 \
 926                                                                             \
 927   product(ccstrlist, OnError, "",                                           \
 928           "Run user-defined commands on fatal error; see VMError.cpp "      \
 929           "for examples")                                                   \
 930                                                                             \
 931   product(ccstrlist, OnOutOfMemoryError, "",                                \
 932           "Run user-defined commands on first java.lang.OutOfMemoryError")  \
 933                                                                             \
 934   manageable(bool, HeapDumpBeforeFullGC, false,                             \
 935           "Dump heap to file before any major stop-the-world GC")           \
 936                                                                             \
 937   manageable(bool, HeapDumpAfterFullGC, false,                              \
 938           "Dump heap to file after any major stop-the-world GC")            \
 939                                                                             \
 940   manageable(bool, HeapDumpOnOutOfMemoryError, false,                       \
 941           "Dump heap to file when java.lang.OutOfMemoryError is thrown")    \
 942                                                                             \
 943   manageable(ccstr, HeapDumpPath, NULL,                                     \
 944           "When HeapDumpOnOutOfMemoryError is on, the path (filename or "   \
 945           "directory) of the dump file (defaults to java_pid<pid>.hprof "   \
 946           "in the working directory)")                                      \
 947                                                                             \
 948   develop(uintx, SegmentedHeapDumpThreshold, 2*G,                           \
 949           "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) "     \
 950           "when the heap usage is larger than this")                        \
 951                                                                             \
 952   develop(uintx, HeapDumpSegmentSize, 1*G,                                  \
 953           "Approximate segment size when generating a segmented heap dump") \
 954                                                                             \
 955   develop(bool, BreakAtWarning, false,                                      \
 956           "Execute breakpoint upon encountering VM warning")                \
 957                                                                             \
 958   develop(bool, TraceVMOperation, false,                                    \
 959           "Trace VM operations")                                            \
 960                                                                             \
 961   develop(bool, UseFakeTimers, false,                                       \
 962           "Tell whether the VM should use system time or a fake timer")     \
 963                                                                             \
 964   product(ccstr, NativeMemoryTracking, "off",                               \
 965           "Native memory tracking options")                                 \
 966                                                                             \
 967   diagnostic(bool, PrintNMTStatistics, false,                               \
 968           "Print native memory tracking summary data if it is on")          \
 969                                                                             \
 970   diagnostic(bool, LogCompilation, false,                                   \
 971           "Log compilation activity in detail to LogFile")                  \
 972                                                                             \
 973   product(bool, PrintCompilation, false,                                    \
 974           "Print compilations")                                             \
 975                                                                             \
 976   diagnostic(bool, TraceNMethodInstalls, false,                             \
 977           "Trace nmethod installation")                                     \
 978                                                                             \
 979   diagnostic(intx, ScavengeRootsInCode, 2,                                  \
 980           "0: do not allow scavengable oops in the code cache; "            \
 981           "1: allow scavenging from the code cache; "                       \
 982           "2: emit as many constants as the compiler can see")              \
 983                                                                             \
 984   product(bool, AlwaysRestoreFPU, false,                                    \
 985           "Restore the FPU control word after every JNI call (expensive)")  \
 986                                                                             \
 987   diagnostic(bool, PrintCompilation2, false,                                \
 988           "Print additional statistics per compilation")                    \
 989                                                                             \
 990   diagnostic(bool, PrintAdapterHandlers, false,                             \
 991           "Print code generated for i2c/c2i adapters")                      \
 992                                                                             \
 993   diagnostic(bool, VerifyAdapterCalls, trueInDebug,                         \
 994           "Verify that i2c/c2i adapters are called properly")               \
 995                                                                             \
 996   develop(bool, VerifyAdapterSharing, false,                                \
 997           "Verify that the code for shared adapters is the equivalent")     \
 998                                                                             \
 999   diagnostic(bool, PrintAssembly, false,                                    \
1000           "Print assembly code (using external disassembler.so)")           \
1001                                                                             \
1002   diagnostic(ccstr, PrintAssemblyOptions, NULL,                             \
1003           "Print options string passed to disassembler.so")                 \
1004                                                                             \
1005   diagnostic(bool, PrintNMethods, false,                                    \
1006           "Print assembly code for nmethods when generated")                \
1007                                                                             \
1008   diagnostic(bool, PrintNativeNMethods, false,                              \
1009           "Print assembly code for native nmethods when generated")         \
1010                                                                             \
1011   develop(bool, PrintDebugInfo, false,                                      \
1012           "Print debug information for all nmethods when generated")        \
1013                                                                             \
1014   develop(bool, PrintRelocations, false,                                    \
1015           "Print relocation information for all nmethods when generated")   \
1016                                                                             \
1017   develop(bool, PrintDependencies, false,                                   \
1018           "Print dependency information for all nmethods when generated")   \
1019                                                                             \
1020   develop(bool, PrintExceptionHandlers, false,                              \
1021           "Print exception handler tables for all nmethods when generated") \
1022                                                                             \
1023   develop(bool, StressCompiledExceptionHandlers, false,                     \
1024           "Exercise compiled exception handlers")                           \
1025                                                                             \
1026   develop(bool, InterceptOSException, false,                                \
1027           "Start debugger when an implicit OS (e.g. NULL) "                 \
1028           "exception happens")                                              \
1029                                                                             \
1030   product(bool, PrintCodeCache, false,                                      \
1031           "Print the code cache memory usage when exiting")                 \
1032                                                                             \
1033   develop(bool, PrintCodeCache2, false,                                     \
1034           "Print detailed usage information on the code cache when exiting")\
1035                                                                             \
1036   product(bool, PrintCodeCacheOnCompilation, false,                         \
1037           "Print the code cache memory usage each time a method is "        \
1038           "compiled")                                                       \
1039                                                                             \
1040   diagnostic(bool, PrintStubCode, false,                                    \
1041           "Print generated stub code")                                      \
1042                                                                             \
1043   product(bool, StackTraceInThrowable, true,                                \
1044           "Collect backtrace in throwable when exception happens")          \
1045                                                                             \
1046   product(bool, OmitStackTraceInFastThrow, true,                            \
1047           "Omit backtraces for some 'hot' exceptions in optimized code")    \
1048                                                                             \
1049   product(bool, ProfilerPrintByteCodeStatistics, false,                     \
1050           "Print bytecode statistics when dumping profiler output")         \
1051                                                                             \
1052   product(bool, ProfilerRecordPC, false,                                    \
1053           "Collect ticks for each 16 byte interval of compiled code")       \
1054                                                                             \
1055   product(bool, ProfileVM, false,                                           \
1056           "Profile ticks that fall within VM (either in the VM Thread "     \
1057           "or VM code called through stubs)")                               \
1058                                                                             \
1059   product(bool, ProfileIntervals, false,                                    \
1060           "Print profiles for each interval (see ProfileIntervalsTicks)")   \
1061                                                                             \
1062   notproduct(bool, ProfilerCheckIntervals, false,                           \
1063           "Collect and print information on spacing of profiler ticks")     \
1064                                                                             \
1065   develop(bool, PrintJVMWarnings, false,                                    \
1066           "Print warnings for unimplemented JVM functions")                 \
1067                                                                             \
1068   product(bool, PrintWarnings, true,                                        \
1069           "Print JVM warnings to output stream")                            \
1070                                                                             \
1071   notproduct(uintx, WarnOnStalledSpinLock, 0,                               \
1072           "Print warnings for stalled SpinLocks")                           \
1073                                                                             \
1074   product(bool, RegisterFinalizersAtInit, true,                             \
1075           "Register finalizable objects at end of Object.<init> or "        \
1076           "after allocation")                                               \
1077                                                                             \
1078   develop(bool, RegisterReferences, true,                                   \
1079           "Tell whether the VM should register soft/weak/final/phantom "    \
1080           "references")                                                     \
1081                                                                             \
1082   develop(bool, IgnoreRewrites, false,                                      \
1083           "Suppress rewrites of bytecodes in the oopmap generator. "        \
1084           "This is unsafe!")                                                \
1085                                                                             \
1086   develop(bool, PrintCodeCacheExtension, false,                             \
1087           "Print extension of code cache")                                  \
1088                                                                             \
1089   develop(bool, UsePrivilegedStack, true,                                   \
1090           "Enable the security JVM functions")                              \
1091                                                                             \
1092   develop(bool, ProtectionDomainVerification, true,                         \
1093           "Verify protection domain before resolution in system dictionary")\
1094                                                                             \
1095   product(bool, ClassUnloading, true,                                       \
1096           "Do unloading of classes")                                        \
1097                                                                             \
1098   product(bool, ClassUnloadingWithConcurrentMark, true,                     \
1099           "Do unloading of classes with a concurrent marking cycle")        \
1100                                                                             \
1101   develop(bool, DisableStartThread, false,                                  \
1102           "Disable starting of additional Java threads "                    \
1103           "(for debugging only)")                                           \
1104                                                                             \
1105   develop(bool, MemProfiling, false,                                        \
1106           "Write memory usage profiling to log file")                       \
1107                                                                             \
1108   notproduct(bool, PrintSystemDictionaryAtExit, false,                      \
1109           "Print the system dictionary at exit")                            \
1110                                                                             \
1111   experimental(intx, PredictedLoadedClassCount, 0,                          \
1112           "Experimental: Tune loaded class cache starting size")            \
1113                                                                             \
1114   diagnostic(bool, UnsyncloadClass, false,                                  \
1115           "Unstable: VM calls loadClass unsynchronized. Custom "            \
1116           "class loader must call VM synchronized for findClass "           \
1117           "and defineClass.")                                               \
1118                                                                             \
1119   product(bool, AlwaysLockClassLoader, false,                               \
1120           "Require the VM to acquire the class loader lock before calling " \
1121           "loadClass() even for class loaders registering "                 \
1122           "as parallel capable")                                            \
1123                                                                             \
1124   product(bool, AllowParallelDefineClass, false,                            \
1125           "Allow parallel defineClass requests for class loaders "          \
1126           "registering as parallel capable")                                \
1127                                                                             \
1128   product(bool, MustCallLoadClassInternal, false,                           \
1129           "Call loadClassInternal() rather than loadClass()")               \
1130                                                                             \
1131   product_pd(bool, DontYieldALot,                                           \
1132           "Throw away obvious excess yield calls")                          \
1133                                                                             \
1134   product_pd(bool, ConvertSleepToYield,                                     \
1135           "Convert sleep(0) to thread yield "                               \
1136           "(may be off for Solaris to improve GUI)")                        \
1137                                                                             \
1138   product(bool, ConvertYieldToSleep, false,                                 \
1139           "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1140           "behavior")                                                       \
1141                                                                             \
1142   product(bool, UseBoundThreads, true,                                      \
1143           "Bind user level threads to kernel threads (for Solaris only)")   \
1144                                                                             \
1145   develop(bool, UseDetachedThreads, true,                                   \
1146           "Use detached threads that are recycled upon termination "        \
1147           "(for Solaris only)")                                             \
1148                                                                             \
1149   product(bool, UseLWPSynchronization, true,                                \
1150           "Use LWP-based instead of libthread-based synchronization "       \
1151           "(SPARC only)")                                                   \
1152                                                                             \
1153   experimental(ccstr, SyncKnobs, NULL,                                      \
1154                "(Unstable) Various monitor synchronization tunables")       \
1155                                                                             \
1156   experimental(intx, EmitSync, 0,                                           \
1157                "(Unsafe, Unstable) "                                        \
1158                "Control emission of inline sync fast-path code")            \
1159                                                                             \
1160   product(intx, MonitorBound, 0, "Bound Monitor population")                \
1161                                                                             \
1162   product(bool, MonitorInUseLists, false, "Track Monitors for Deflation")   \
1163                                                                             \
1164   experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) "                    \
1165                "Experimental Sync flags")                                   \
1166                                                                             \
1167   experimental(intx, SyncVerbose, 0, "(Unstable)")                          \
1168                                                                             \
1169   experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)")               \
1170                                                                             \
1171   experimental(intx, hashCode, 5,                                           \
1172                "(Unstable) select hashCode generation algorithm")           \
1173                                                                             \
1174   experimental(intx, WorkAroundNPTLTimedWaitHang, 1,                        \
1175                "(Unstable, Linux-specific) "                                \
1176                "avoid NPTL-FUTEX hang pthread_cond_timedwait")              \
1177                                                                             \
1178   product(bool, FilterSpuriousWakeups, true,                                \
1179           "When true prevents OS-level spurious, or premature, wakeups "    \
1180           "from Object.wait (Ignored for Windows)")                         \
1181                                                                             \
1182   experimental(intx, NativeMonitorTimeout, -1, "(Unstable)")                \
1183                                                                             \
1184   experimental(intx, NativeMonitorFlags, 0, "(Unstable)")                   \
1185                                                                             \
1186   experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)")              \
1187                                                                             \
1188   develop(bool, UsePthreads, false,                                         \
1189           "Use pthread-based instead of libthread-based synchronization "   \
1190           "(SPARC only)")                                                   \
1191                                                                             \
1192   product(bool, AdjustConcurrency, false,                                   \
1193           "Call thr_setconcurrency at thread creation time to avoid "       \
1194           "LWP starvation on MP systems (for Solaris Only)")                \
1195                                                                             \
1196   product(bool, ReduceSignalUsage, false,                                   \
1197           "Reduce the use of OS signals in Java and/or the VM")             \
1198                                                                             \
1199   develop_pd(bool, ShareVtableStubs,                                        \
1200           "Share vtable stubs (smaller code but worse branch prediction")   \
1201                                                                             \
1202   develop(bool, LoadLineNumberTables, true,                                 \
1203           "Tell whether the class file parser loads line number tables")    \
1204                                                                             \
1205   develop(bool, LoadLocalVariableTables, true,                              \
1206           "Tell whether the class file parser loads local variable tables") \
1207                                                                             \
1208   develop(bool, LoadLocalVariableTypeTables, true,                          \
1209           "Tell whether the class file parser loads local variable type"    \
1210           "tables")                                                         \
1211                                                                             \
1212   product(bool, AllowUserSignalHandlers, false,                             \
1213           "Do not complain if the application installs signal handlers "    \
1214           "(Solaris & Linux only)")                                         \
1215                                                                             \
1216   product(bool, UseSignalChaining, true,                                    \
1217           "Use signal-chaining to invoke signal handlers installed "        \
1218           "by the application (Solaris & Linux only)")                      \
1219                                                                             \
1220   product(bool, UseAltSigs, false,                                          \
1221           "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM "      \
1222           "internal signals (Solaris only)")                                \
1223                                                                             \
1224   product(bool, AllowJNIEnvProxy, false,                                    \
1225           "Allow JNIEnv proxies for jdbx")                                  \
1226                                                                             \
1227   product(bool, JNIDetachReleasesMonitors, true,                            \
1228           "JNI DetachCurrentThread releases monitors owned by thread")      \
1229                                                                             \
1230   product(bool, RestoreMXCSROnJNICalls, false,                              \
1231           "Restore MXCSR when returning from JNI calls")                    \
1232                                                                             \
1233   product(bool, CheckJNICalls, false,                                       \
1234           "Verify all arguments to JNI calls")                              \
1235                                                                             \
1236   product(bool, UseFastJNIAccessors, true,                                  \
1237           "Use optimized versions of Get<Primitive>Field")                  \
1238                                                                             \
1239   product(intx, MaxJNILocalCapacity, 65536,                                 \
1240           "Maximum allowable local JNI handle capacity to "                 \
1241           "EnsureLocalCapacity() and PushLocalFrame(), "                    \
1242           "where <= 0 is unlimited, default: 65536")                        \
1243                                                                             \
1244   product(bool, EagerXrunInit, false,                                       \
1245           "Eagerly initialize -Xrun libraries; allows startup profiling, "  \
1246           "but not all -Xrun libraries may support the state of the VM "    \
1247           "at this time")                                                   \
1248                                                                             \
1249   product(bool, PreserveAllAnnotations, false,                              \
1250           "Preserve RuntimeInvisibleAnnotations as well "                   \
1251           "as RuntimeVisibleAnnotations")                                   \
1252                                                                             \
1253   develop(uintx, PreallocatedOutOfMemoryErrorCount, 4,                      \
1254           "Number of OutOfMemoryErrors preallocated with backtrace")        \
1255                                                                             \
1256   product(bool, LazyBootClassLoader, true,                                  \
1257           "Enable/disable lazy opening of boot class path entries")         \
1258                                                                             \
1259   product(bool, UseXMMForArrayCopy, false,                                  \
1260           "Use SSE2 MOVQ instruction for Arraycopy")                        \
1261                                                                             \
1262   product(intx, FieldsAllocationStyle, 1,                                   \
1263           "0 - type based with oops first, 1 - with oops last, "            \
1264           "2 - oops in super and sub classes are together")                 \
1265                                                                             \
1266   product(bool, CompactFields, true,                                        \
1267           "Allocate nonstatic fields in gaps between previous fields")      \
1268                                                                             \
1269   notproduct(bool, PrintFieldLayout, false,                                 \
1270           "Print field layout for each class")                              \
1271                                                                             \
1272   product(intx, ContendedPaddingWidth, 128,                                 \
1273           "How many bytes to pad the fields/classes marked @Contended with")\
1274                                                                             \
1275   product(bool, EnableContended, true,                                      \
1276           "Enable @Contended annotation support")                           \
1277                                                                             \
1278   product(bool, RestrictContended, true,                                    \
1279           "Restrict @Contended to trusted classes")                         \
1280                                                                             \
1281   product(bool, UseBiasedLocking, true,                                     \
1282           "Enable biased locking in JVM")                                   \
1283                                                                             \
1284   product(intx, BiasedLockingStartupDelay, 4000,                            \
1285           "Number of milliseconds to wait before enabling biased locking")  \
1286                                                                             \
1287   diagnostic(bool, PrintBiasedLockingStatistics, false,                     \
1288           "Print statistics of biased locking in JVM")                      \
1289                                                                             \
1290   product(intx, BiasedLockingBulkRebiasThreshold, 20,                       \
1291           "Threshold of number of revocations per type to try to "          \
1292           "rebias all objects in the heap of that type")                    \
1293                                                                             \
1294   product(intx, BiasedLockingBulkRevokeThreshold, 40,                       \
1295           "Threshold of number of revocations per type to permanently "     \
1296           "revoke biases of all objects in the heap of that type")          \
1297                                                                             \
1298   product(intx, BiasedLockingDecayTime, 25000,                              \
1299           "Decay time (in milliseconds) to re-enable bulk rebiasing of a "  \
1300           "type after previous bulk rebias")                                \
1301                                                                             \
1302   /* tracing */                                                             \
1303                                                                             \
1304   notproduct(bool, TraceRuntimeCalls, false,                                \
1305           "Trace run-time calls")                                           \
1306                                                                             \
1307   develop(bool, TraceJNICalls, false,                                       \
1308           "Trace JNI calls")                                                \
1309                                                                             \
1310   develop(bool, StressRewriter, false,                                      \
1311           "Stress linktime bytecode rewriting")                             \
1312                                                                             \
1313   notproduct(bool, TraceJVMCalls, false,                                    \
1314           "Trace JVM calls")                                                \
1315                                                                             \
1316   product(ccstr, TraceJVMTI, NULL,                                          \
1317           "Trace flags for JVMTI functions and events")                     \
1318                                                                             \
1319   /* This option can change an EMCP method into an obsolete method. */      \
1320   /* This can affect tests that except specific methods to be EMCP. */      \
1321   /* This option should be used with caution. */                            \
1322   product(bool, StressLdcRewrite, false,                                    \
1323           "Force ldc -> ldc_w rewrite during RedefineClasses")              \
1324                                                                             \
1325   product(intx, TraceRedefineClasses, 0,                                    \
1326           "Trace level for JVMTI RedefineClasses")                          \
1327                                                                             \
1328   develop(bool, StressMethodComparator, false,                              \
1329           "Run the MethodComparator on all loaded methods")                 \
1330                                                                             \
1331   /* change to false by default sometime after Mustang */                   \
1332   product(bool, VerifyMergedCPBytecodes, true,                              \
1333           "Verify bytecodes after RedefineClasses constant pool merging")   \
1334                                                                             \
1335   develop(bool, TraceJNIHandleAllocation, false,                            \
1336           "Trace allocation/deallocation of JNI handle blocks")             \
1337                                                                             \
1338   develop(bool, TraceThreadEvents, false,                                   \
1339           "Trace all thread events")                                        \
1340                                                                             \
1341   develop(bool, TraceBytecodes, false,                                      \
1342           "Trace bytecode execution")                                       \
1343                                                                             \
1344   develop(bool, TraceClassInitialization, false,                            \
1345           "Trace class initialization")                                     \
1346                                                                             \
1347   develop(bool, TraceExceptions, false,                                     \
1348           "Trace exceptions")                                               \
1349                                                                             \
1350   develop(bool, TraceICs, false,                                            \
1351           "Trace inline cache changes")                                     \
1352                                                                             \
1353   notproduct(bool, TraceInvocationCounterOverflow, false,                   \
1354           "Trace method invocation counter overflow")                       \
1355                                                                             \
1356   develop(bool, TraceInlineCacheClearing, false,                            \
1357           "Trace clearing of inline caches in nmethods")                    \
1358                                                                             \
1359   develop(bool, TraceDependencies, false,                                   \
1360           "Trace dependencies")                                             \
1361                                                                             \
1362   develop(bool, VerifyDependencies, trueInDebug,                            \
1363           "Exercise and verify the compilation dependency mechanism")       \
1364                                                                             \
1365   develop(bool, TraceNewOopMapGeneration, false,                            \
1366           "Trace OopMapGeneration")                                         \
1367                                                                             \
1368   develop(bool, TraceNewOopMapGenerationDetailed, false,                    \
1369           "Trace OopMapGeneration: print detailed cell states")             \
1370                                                                             \
1371   develop(bool, TimeOopMap, false,                                          \
1372           "Time calls to GenerateOopMap::compute_map() in sum")             \
1373                                                                             \
1374   develop(bool, TimeOopMap2, false,                                         \
1375           "Time calls to GenerateOopMap::compute_map() individually")       \
1376                                                                             \
1377   develop(bool, TraceMonitorMismatch, false,                                \
1378           "Trace monitor matching failures during OopMapGeneration")        \
1379                                                                             \
1380   develop(bool, TraceOopMapRewrites, false,                                 \
1381           "Trace rewriting of method oops during oop map generation")       \
1382                                                                             \
1383   develop(bool, TraceSafepoint, false,                                      \
1384           "Trace safepoint operations")                                     \
1385                                                                             \
1386   develop(bool, TraceICBuffer, false,                                       \
1387           "Trace usage of IC buffer")                                       \
1388                                                                             \
1389   develop(bool, TraceCompiledIC, false,                                     \
1390           "Trace changes of compiled IC")                                   \
1391                                                                             \
1392   notproduct(bool, TraceZapDeadLocals, false,                               \
1393           "Trace zapping dead locals")                                      \
1394                                                                             \
1395   develop(bool, TraceStartupTime, false,                                    \
1396           "Trace setup time")                                               \
1397                                                                             \
1398   develop(bool, TraceProtectionDomainVerification, false,                   \
1399           "Trace protection domain verification")                           \
1400                                                                             \
1401   develop(bool, TraceClearedExceptions, false,                              \
1402           "Print when an exception is forcibly cleared")                    \
1403                                                                             \
1404   product(bool, TraceClassResolution, false,                                \
1405           "Trace all constant pool resolutions (for debugging)")            \
1406                                                                             \
1407   product(bool, TraceBiasedLocking, false,                                  \
1408           "Trace biased locking in JVM")                                    \
1409                                                                             \
1410   product(bool, TraceMonitorInflation, false,                               \
1411           "Trace monitor inflation in JVM")                                 \
1412                                                                             \
1413   /* gc */                                                                  \
1414                                                                             \
1415   product(bool, UseSerialGC, false,                                         \
1416           "Use the Serial garbage collector")                               \
1417                                                                             \
1418   product(bool, UseG1GC, false,                                             \
1419           "Use the Garbage-First garbage collector")                        \
1420                                                                             \
1421   product(bool, UseParallelGC, false,                                       \
1422           "Use the Parallel Scavenge garbage collector")                    \
1423                                                                             \
1424   product(bool, UseParallelOldGC, false,                                    \
1425           "Use the Parallel Old garbage collector")                         \
1426                                                                             \
1427   product(uintx, HeapMaximumCompactionInterval, 20,                         \
1428           "How often should we maximally compact the heap (not allowing "   \
1429           "any dead space)")                                                \
1430                                                                             \
1431   product(uintx, HeapFirstMaximumCompactionCount, 3,                        \
1432           "The collection count for the first maximum compaction")          \
1433                                                                             \
1434   product(bool, UseMaximumCompactionOnSystemGC, true,                       \
1435           "Use maximum compaction in the Parallel Old garbage collector "   \
1436           "for a system GC")                                                \
1437                                                                             \
1438   product(uintx, ParallelOldDeadWoodLimiterMean, 50,                        \
1439           "The mean used by the parallel compact dead wood "                \
1440           "limiter (a number between 0-100)")                               \
1441                                                                             \
1442   product(uintx, ParallelOldDeadWoodLimiterStdDev, 80,                      \
1443           "The standard deviation used by the parallel compact dead wood "  \
1444           "limiter (a number between 0-100)")                               \
1445                                                                             \
1446   product(uintx, ParallelGCThreads, 0,                                      \
1447           "Number of parallel threads parallel gc will use")                \
1448                                                                             \
1449   product(bool, UseDynamicNumberOfGCThreads, false,                         \
1450           "Dynamically choose the number of parallel threads "              \
1451           "parallel gc will use")                                           \
1452                                                                             \
1453   diagnostic(bool, ForceDynamicNumberOfGCThreads, false,                    \
1454           "Force dynamic selection of the number of "                       \
1455           "parallel threads parallel gc will use to aid debugging")         \
1456                                                                             \
1457   product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M),               \
1458           "Size of heap (bytes) per GC thread used in calculating the "     \
1459           "number of GC threads")                                           \
1460                                                                             \
1461   product(bool, TraceDynamicGCThreads, false,                               \
1462           "Trace the dynamic GC thread usage")                              \
1463                                                                             \
1464   develop(bool, ParallelOldGCSplitALot, false,                              \
1465           "Provoke splitting (copying data from a young gen space to "      \
1466           "multiple destination spaces)")                                   \
1467                                                                             \
1468   develop(uintx, ParallelOldGCSplitInterval, 3,                             \
1469           "How often to provoke splitting a young gen space")               \
1470                                                                             \
1471   product(uintx, ConcGCThreads, 0,                                          \
1472           "Number of threads concurrent gc will use")                       \
1473                                                                             \
1474   product(uintx, YoungPLABSize, 4096,                                       \
1475           "Size of young gen promotion LAB's (in HeapWords)")               \
1476                                                                             \
1477   product(uintx, OldPLABSize, 1024,                                         \
1478           "Size of old gen promotion LAB's (in HeapWords)")                 \
1479                                                                             \
1480   product(uintx, GCTaskTimeStampEntries, 200,                               \
1481           "Number of time stamp entries per gc worker thread")              \
1482                                                                             \
1483   product(bool, AlwaysTenure, false,                                        \
1484           "Always tenure objects in eden (ParallelGC only)")                \
1485                                                                             \
1486   product(bool, NeverTenure, false,                                         \
1487           "Never tenure objects in eden, may tenure on overflow "           \
1488           "(ParallelGC only)")                                              \
1489                                                                             \
1490   product(bool, ScavengeBeforeFullGC, true,                                 \
1491           "Scavenge youngest generation before each full GC.")              \
1492                                                                             \
1493   develop(bool, ScavengeWithObjectsInToSpace, false,                        \
1494           "Allow scavenges to occur when to-space contains objects")        \
1495                                                                             \
1496   product(bool, UseConcMarkSweepGC, false,                                  \
1497           "Use Concurrent Mark-Sweep GC in the old generation")             \
1498                                                                             \
1499   product(bool, ExplicitGCInvokesConcurrent, false,                         \
1500           "A System.gc() request invokes a concurrent collection; "         \
1501           "(effective only when UseConcMarkSweepGC)")                       \
1502                                                                             \
1503   product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false,        \
1504           "A System.gc() request invokes a concurrent collection and "      \
1505           "also unloads classes during such a concurrent gc cycle "         \
1506           "(effective only when UseConcMarkSweepGC)")                       \
1507                                                                             \
1508   product(bool, GCLockerInvokesConcurrent, false,                           \
1509           "The exit of a JNI critical section necessitating a scavenge, "   \
1510           "also kicks off a background concurrent collection")              \
1511                                                                             \
1512   product(uintx, GCLockerEdenExpansionPercent, 5,                           \
1513           "How much the GC can expand the eden by while the GC locker "     \
1514           "is active (as a percentage)")                                    \
1515                                                                             \
1516   diagnostic(intx, GCLockerRetryAllocationCount, 2,                         \
1517           "Number of times to retry allocations when "                      \
1518           "blocked by the GC locker")                                       \
1519                                                                             \
1520   develop(bool, UseCMSAdaptiveFreeLists, true,                              \
1521           "Use adaptive free lists in the CMS generation")                  \
1522                                                                             \
1523   develop(bool, UseAsyncConcMarkSweepGC, true,                              \
1524           "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1525                                                                             \
1526   product(bool, UseCMSBestFit, true,                                        \
1527           "Use CMS best fit allocation strategy")                           \
1528                                                                             \
1529   product(bool, UseParNewGC, false,                                         \
1530           "Use parallel threads in the new generation")                     \
1531                                                                             \
1532   product(bool, PrintTaskqueue, false,                                      \
1533           "Print taskqueue statistics for parallel collectors")             \
1534                                                                             \
1535   product(bool, PrintTerminationStats, false,                               \
1536           "Print termination statistics for parallel collectors")           \
1537                                                                             \
1538   product(uintx, ParallelGCBufferWastePct, 10,                              \
1539           "Wasted fraction of parallel allocation buffer")                  \
1540                                                                             \
1541   diagnostic(bool, ParallelGCRetainPLAB, false,                             \
1542           "Retain parallel allocation buffers across scavenges; "           \
1543           "it is disabled because this currently conflicts with "           \
1544           "parallel card scanning under certain conditions.")               \
1545                                                                             \
1546   product(uintx, TargetPLABWastePct, 10,                                    \
1547           "Target wasted space in last buffer as percent of overall "       \
1548           "allocation")                                                     \
1549                                                                             \
1550   product(uintx, PLABWeight, 75,                                            \
1551           "Percentage (0-100) used to weight the current sample when "      \
1552           "computing exponentially decaying average for ResizePLAB")        \
1553                                                                             \
1554   product(bool, ResizePLAB, true,                                           \
1555           "Dynamically resize (survivor space) promotion LAB's")            \
1556                                                                             \
1557   product(bool, PrintPLAB, false,                                           \
1558           "Print (survivor space) promotion LAB's sizing decisions")        \
1559                                                                             \
1560   product(intx, ParGCArrayScanChunk, 50,                                    \
1561           "Scan a subset of object array and push remainder, if array is "  \
1562           "bigger than this")                                               \
1563                                                                             \
1564   product(bool, ParGCUseLocalOverflow, false,                               \
1565           "Instead of a global overflow list, use local overflow stacks")   \
1566                                                                             \
1567   product(bool, ParGCTrimOverflow, true,                                    \
1568           "Eagerly trim the local overflow lists "                          \
1569           "(when ParGCUseLocalOverflow)")                                   \
1570                                                                             \
1571   notproduct(bool, ParGCWorkQueueOverflowALot, false,                       \
1572           "Simulate work queue overflow in ParNew")                         \
1573                                                                             \
1574   notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000,                   \
1575           "An `interval' counter that determines how frequently "           \
1576           "we simulate overflow; a smaller number increases frequency")     \
1577                                                                             \
1578   product(uintx, ParGCDesiredObjsFromOverflowList, 20,                      \
1579           "The desired number of objects to claim from the overflow list")  \
1580                                                                             \
1581   diagnostic(uintx, ParGCStridesPerThread, 2,                               \
1582           "The number of strides per worker thread that we divide up the "  \
1583           "card table scanning work into")                                  \
1584                                                                             \
1585   diagnostic(intx, ParGCCardsPerStrideChunk, 256,                           \
1586           "The number of cards in each chunk of the parallel chunks used "  \
1587           "during card table scanning")                                     \
1588                                                                             \
1589   product(uintx, CMSParPromoteBlocksToClaim, 16,                            \
1590           "Number of blocks to attempt to claim when refilling CMS LAB's "  \
1591           "for parallel GC")                                                \
1592                                                                             \
1593   product(uintx, OldPLABWeight, 50,                                         \
1594           "Percentage (0-100) used to weight the current sample when "      \
1595           "computing exponentially decaying average for resizing "          \
1596           "CMSParPromoteBlocksToClaim")                                     \
1597                                                                             \
1598   product(bool, ResizeOldPLAB, true,                                        \
1599           "Dynamically resize (old gen) promotion LAB's")                   \
1600                                                                             \
1601   product(bool, PrintOldPLAB, false,                                        \
1602           "Print (old gen) promotion LAB's sizing decisions")               \
1603                                                                             \
1604   product(uintx, CMSOldPLABMin, 16,                                         \
1605           "Minimum size of CMS gen promotion LAB caches per worker "        \
1606           "per block size")                                                 \
1607                                                                             \
1608   product(uintx, CMSOldPLABMax, 1024,                                       \
1609           "Maximum size of CMS gen promotion LAB caches per worker "        \
1610           "per block size")                                                 \
1611                                                                             \
1612   product(uintx, CMSOldPLABNumRefills, 4,                                   \
1613           "Nominal number of refills of CMS gen promotion LAB cache "       \
1614           "per worker per block size")                                      \
1615                                                                             \
1616   product(bool, CMSOldPLABResizeQuicker, false,                             \
1617           "React on-the-fly during a scavenge to a sudden "                 \
1618           "change in block demand rate")                                    \
1619                                                                             \
1620   product(uintx, CMSOldPLABToleranceFactor, 4,                              \
1621           "The tolerance of the phase-change detector for on-the-fly "      \
1622           "PLAB resizing during a scavenge")                                \
1623                                                                             \
1624   product(uintx, CMSOldPLABReactivityFactor, 2,                             \
1625           "The gain in the feedback loop for on-the-fly PLAB resizing "     \
1626           "during a scavenge")                                              \
1627                                                                             \
1628   product(bool, AlwaysPreTouch, false,                                      \
1629           "Force all freshly committed pages to be pre-touched")            \
1630                                                                             \
1631   product_pd(uintx, CMSYoungGenPerWorker,                                   \
1632           "The maximum size of young gen chosen by default per GC worker "  \
1633           "thread available")                                               \
1634                                                                             \
1635   product(uintx, CMSIncrementalSafetyFactor, 10,                            \
1636           "Percentage (0-100) used to add conservatism when computing the " \
1637           "duty cycle")                                                     \
1638                                                                             \
1639   product(uintx, CMSExpAvgFactor, 50,                                       \
1640           "Percentage (0-100) used to weight the current sample when "      \
1641           "computing exponential averages for CMS statistics")              \
1642                                                                             \
1643   product(uintx, CMS_FLSWeight, 75,                                         \
1644           "Percentage (0-100) used to weight the current sample when "      \
1645           "computing exponentially decaying averages for CMS FLS "          \
1646           "statistics")                                                     \
1647                                                                             \
1648   product(uintx, CMS_FLSPadding, 1,                                         \
1649           "The multiple of deviation from mean to use for buffering "       \
1650           "against volatility in free list demand")                         \
1651                                                                             \
1652   product(uintx, FLSCoalescePolicy, 2,                                      \
1653           "CMS: aggressiveness level for coalescing, increasing "           \
1654           "from 0 to 4")                                                    \
1655                                                                             \
1656   product(bool, FLSAlwaysCoalesceLarge, false,                              \
1657           "CMS: larger free blocks are always available for coalescing")    \
1658                                                                             \
1659   product(double, FLSLargestBlockCoalesceProximity, 0.99,                   \
1660           "CMS: the smaller the percentage the greater the coalescing "     \
1661           "force")                                                          \
1662                                                                             \
1663   product(double, CMSSmallCoalSurplusPercent, 1.05,                         \
1664           "CMS: the factor by which to inflate estimated demand of small "  \
1665           "block sizes to prevent coalescing with an adjoining block")      \
1666                                                                             \
1667   product(double, CMSLargeCoalSurplusPercent, 0.95,                         \
1668           "CMS: the factor by which to inflate estimated demand of large "  \
1669           "block sizes to prevent coalescing with an adjoining block")      \
1670                                                                             \
1671   product(double, CMSSmallSplitSurplusPercent, 1.10,                        \
1672           "CMS: the factor by which to inflate estimated demand of small "  \
1673           "block sizes to prevent splitting to supply demand for smaller "  \
1674           "blocks")                                                         \
1675                                                                             \
1676   product(double, CMSLargeSplitSurplusPercent, 1.00,                        \
1677           "CMS: the factor by which to inflate estimated demand of large "  \
1678           "block sizes to prevent splitting to supply demand for smaller "  \
1679           "blocks")                                                         \
1680                                                                             \
1681   product(bool, CMSExtrapolateSweep, false,                                 \
1682           "CMS: cushion for block demand during sweep")                     \
1683                                                                             \
1684   product(uintx, CMS_SweepWeight, 75,                                       \
1685           "Percentage (0-100) used to weight the current sample when "      \
1686           "computing exponentially decaying average for inter-sweep "       \
1687           "duration")                                                       \
1688                                                                             \
1689   product(uintx, CMS_SweepPadding, 1,                                       \
1690           "The multiple of deviation from mean to use for buffering "       \
1691           "against volatility in inter-sweep duration")                     \
1692                                                                             \
1693   product(uintx, CMS_SweepTimerThresholdMillis, 10,                         \
1694           "Skip block flux-rate sampling for an epoch unless inter-sweep "  \
1695           "duration exceeds this threshold in milliseconds")                \
1696                                                                             \
1697   product(bool, CMSClassUnloadingEnabled, true,                             \
1698           "Whether class unloading enabled when using CMS GC")              \
1699                                                                             \
1700   product(uintx, CMSClassUnloadingMaxInterval, 0,                           \
1701           "When CMS class unloading is enabled, the maximum CMS cycle "     \
1702           "count for which classes may not be unloaded")                    \
1703                                                                             \
1704   develop(intx, CMSDictionaryChoice, 0,                                     \
1705           "Use BinaryTreeDictionary as default in the CMS generation")      \
1706                                                                             \
1707   product(uintx, CMSIndexedFreeListReplenish, 4,                            \
1708           "Replenish an indexed free list with this number of chunks")      \
1709                                                                             \
1710   product(bool, CMSReplenishIntermediate, true,                             \
1711           "Replenish all intermediate free-list caches")                    \
1712                                                                             \
1713   product(bool, CMSSplitIndexedFreeListBlocks, true,                        \
1714           "When satisfying batched demand, split blocks from the "          \
1715           "IndexedFreeList whose size is a multiple of requested size")     \
1716                                                                             \
1717   product(bool, CMSLoopWarn, false,                                         \
1718           "Warn in case of excessive CMS looping")                          \
1719                                                                             \
1720   develop(bool, CMSOverflowEarlyRestoration, false,                         \
1721           "Restore preserved marks early")                                  \
1722                                                                             \
1723   product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M),              \
1724           "Size of marking stack")                                          \
1725                                                                             \
1726   product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M),          \
1727           "Maximum size of marking stack")                                  \
1728                                                                             \
1729   notproduct(bool, CMSMarkStackOverflowALot, false,                         \
1730           "Simulate frequent marking stack / work queue overflow")          \
1731                                                                             \
1732   notproduct(uintx, CMSMarkStackOverflowInterval, 1000,                     \
1733           "An \"interval\" counter that determines how frequently "         \
1734           "to simulate overflow; a smaller number increases frequency")     \
1735                                                                             \
1736   product(uintx, CMSMaxAbortablePrecleanLoops, 0,                           \
1737           "Maximum number of abortable preclean iterations, if > 0")        \
1738                                                                             \
1739   product(intx, CMSMaxAbortablePrecleanTime, 5000,                          \
1740           "Maximum time in abortable preclean (in milliseconds)")           \
1741                                                                             \
1742   product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100,              \
1743           "Nominal minimum work per abortable preclean iteration")          \
1744                                                                             \
1745   manageable(intx, CMSAbortablePrecleanWaitMillis, 100,                     \
1746           "Time that we sleep between iterations when not given "           \
1747           "enough work per iteration")                                      \
1748                                                                             \
1749   product(uintx, CMSRescanMultiple, 32,                                     \
1750           "Size (in cards) of CMS parallel rescan task")                    \
1751                                                                             \
1752   product(uintx, CMSConcMarkMultiple, 32,                                   \
1753           "Size (in cards) of CMS concurrent MT marking task")              \
1754                                                                             \
1755   product(bool, CMSAbortSemantics, false,                                   \
1756           "Whether abort-on-overflow semantics is implemented")             \
1757                                                                             \
1758   product(bool, CMSParallelInitialMarkEnabled, true,                        \
1759           "Use the parallel initial mark.")                                 \
1760                                                                             \
1761   product(bool, CMSParallelRemarkEnabled, true,                             \
1762           "Whether parallel remark enabled (only if ParNewGC)")             \
1763                                                                             \
1764   product(bool, CMSParallelSurvivorRemarkEnabled, true,                     \
1765           "Whether parallel remark of survivor space "                      \
1766           "enabled (effective only if CMSParallelRemarkEnabled)")           \
1767                                                                             \
1768   product(bool, CMSPLABRecordAlways, true,                                  \
1769           "Always record survivor space PLAB boundaries (effective only "   \
1770           "if CMSParallelSurvivorRemarkEnabled)")                           \
1771                                                                             \
1772   product(bool, CMSEdenChunksRecordAlways, true,                            \
1773           "Always record eden chunks used for the parallel initial mark "   \
1774           "or remark of eden")                                              \
1775                                                                             \
1776   product(bool, CMSPrintEdenSurvivorChunks, false,                          \
1777           "Print the eden and the survivor chunks used for the parallel "   \
1778           "initial mark or remark of the eden/survivor spaces")             \
1779                                                                             \
1780   product(bool, CMSConcurrentMTEnabled, true,                               \
1781           "Whether multi-threaded concurrent work enabled "                 \
1782           "(effective only if ParNewGC)")                                   \
1783                                                                             \
1784   product(bool, CMSPrecleaningEnabled, true,                                \
1785           "Whether concurrent precleaning enabled")                         \
1786                                                                             \
1787   product(uintx, CMSPrecleanIter, 3,                                        \
1788           "Maximum number of precleaning iteration passes")                 \
1789                                                                             \
1790   product(uintx, CMSPrecleanNumerator, 2,                                   \
1791           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1792           "ratio")                                                          \
1793                                                                             \
1794   product(uintx, CMSPrecleanDenominator, 3,                                 \
1795           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1796           "ratio")                                                          \
1797                                                                             \
1798   product(bool, CMSPrecleanRefLists1, true,                                 \
1799           "Preclean ref lists during (initial) preclean phase")             \
1800                                                                             \
1801   product(bool, CMSPrecleanRefLists2, false,                                \
1802           "Preclean ref lists during abortable preclean phase")             \
1803                                                                             \
1804   product(bool, CMSPrecleanSurvivors1, false,                               \
1805           "Preclean survivors during (initial) preclean phase")             \
1806                                                                             \
1807   product(bool, CMSPrecleanSurvivors2, true,                                \
1808           "Preclean survivors during abortable preclean phase")             \
1809                                                                             \
1810   product(uintx, CMSPrecleanThreshold, 1000,                                \
1811           "Do not iterate again if number of dirty cards is less than this")\
1812                                                                             \
1813   product(bool, CMSCleanOnEnter, true,                                      \
1814           "Clean-on-enter optimization for reducing number of dirty cards") \
1815                                                                             \
1816   product(uintx, CMSRemarkVerifyVariant, 1,                                 \
1817           "Choose variant (1,2) of verification following remark")          \
1818                                                                             \
1819   product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M,                   \
1820           "If Eden size is below this, do not try to schedule remark")      \
1821                                                                             \
1822   product(uintx, CMSScheduleRemarkEdenPenetration, 50,                      \
1823           "The Eden occupancy percentage (0-100) at which "                 \
1824           "to try and schedule remark pause")                               \
1825                                                                             \
1826   product(uintx, CMSScheduleRemarkSamplingRatio, 5,                         \
1827           "Start sampling eden top at least before young gen "              \
1828           "occupancy reaches 1/<ratio> of the size at which "               \
1829           "we plan to schedule remark")                                     \
1830                                                                             \
1831   product(uintx, CMSSamplingGrain, 16*K,                                    \
1832           "The minimum distance between eden samples for CMS (see above)")  \
1833                                                                             \
1834   product(bool, CMSScavengeBeforeRemark, false,                             \
1835           "Attempt scavenge before the CMS remark step")                    \
1836                                                                             \
1837   develop(bool, CMSTraceSweeper, false,                                     \
1838           "Trace some actions of the CMS sweeper")                          \
1839                                                                             \
1840   product(uintx, CMSWorkQueueDrainThreshold, 10,                            \
1841           "Don't drain below this size per parallel worker/thief")          \
1842                                                                             \
1843   manageable(intx, CMSWaitDuration, 2000,                                   \
1844           "Time in milliseconds that CMS thread waits for young GC")        \
1845                                                                             \
1846   develop(uintx, CMSCheckInterval, 1000,                                    \
1847           "Interval in milliseconds that CMS thread checks if it "          \
1848           "should start a collection cycle")                                \
1849                                                                             \
1850   product(bool, CMSYield, true,                                             \
1851           "Yield between steps of CMS")                                     \
1852                                                                             \
1853   product(uintx, CMSBitMapYieldQuantum, 10*M,                               \
1854           "Bitmap operations should process at most this many bits "        \
1855           "between yields")                                                 \
1856                                                                             \
1857   product(bool, CMSDumpAtPromotionFailure, false,                           \
1858           "Dump useful information about the state of the CMS old "         \
1859           "generation upon a promotion failure")                            \
1860                                                                             \
1861   product(bool, CMSPrintChunksInDump, false,                                \
1862           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1863           "more detailed information about the free chunks")                \
1864                                                                             \
1865   product(bool, CMSPrintObjectsInDump, false,                               \
1866           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1867           "more detailed information about the allocated objects")          \
1868                                                                             \
1869   diagnostic(bool, FLSVerifyAllHeapReferences, false,                       \
1870           "Verify that all references across the FLS boundary "             \
1871           "are to valid objects")                                           \
1872                                                                             \
1873   diagnostic(bool, FLSVerifyLists, false,                                   \
1874           "Do lots of (expensive) FreeListSpace verification")              \
1875                                                                             \
1876   diagnostic(bool, FLSVerifyIndexTable, false,                              \
1877           "Do lots of (expensive) FLS index table verification")            \
1878                                                                             \
1879   develop(bool, FLSVerifyDictionary, false,                                 \
1880           "Do lots of (expensive) FLS dictionary verification")             \
1881                                                                             \
1882   develop(bool, VerifyBlockOffsetArray, false,                              \
1883           "Do (expensive) block offset array verification")                 \
1884                                                                             \
1885   diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false,              \
1886           "Maintain _unallocated_block in BlockOffsetArray "                \
1887           "(currently applicable only to CMS collector)")                   \
1888                                                                             \
1889   develop(bool, TraceCMSState, false,                                       \
1890           "Trace the state of the CMS collection")                          \
1891                                                                             \
1892   product(intx, RefDiscoveryPolicy, 0,                                      \
1893           "Select type of reference discovery policy: "                     \
1894           "reference-based(0) or referent-based(1)")                        \
1895                                                                             \
1896   product(bool, ParallelRefProcEnabled, false,                              \
1897           "Enable parallel reference processing whenever possible")         \
1898                                                                             \
1899   product(bool, ParallelRefProcBalancingEnabled, true,                      \
1900           "Enable balancing of reference processing queues")                \
1901                                                                             \
1902   product(uintx, CMSTriggerRatio, 80,                                       \
1903           "Percentage of MinHeapFreeRatio in CMS generation that is "       \
1904           "allocated before a CMS collection cycle commences")              \
1905                                                                             \
1906   product(uintx, CMSBootstrapOccupancy, 50,                                 \
1907           "Percentage CMS generation occupancy at which to "                \
1908           "initiate CMS collection for bootstrapping collection stats")     \
1909                                                                             \
1910   product(intx, CMSInitiatingOccupancyFraction, -1,                         \
1911           "Percentage CMS generation occupancy to start a CMS collection "  \
1912           "cycle. A negative value means that CMSTriggerRatio is used")     \
1913                                                                             \
1914   product(uintx, InitiatingHeapOccupancyPercent, 45,                        \
1915           "Percentage of the (entire) heap occupancy to start a "           \
1916           "concurrent GC cycle. It is used by GCs that trigger a "          \
1917           "concurrent GC cycle based on the occupancy of the entire heap, " \
1918           "not just one of the generations (e.g., G1). A value of 0 "       \
1919           "denotes 'do constant GC cycles'.")                               \
1920                                                                             \
1921   manageable(intx, CMSTriggerInterval, -1,                                  \
1922           "Commence a CMS collection cycle (at least) every so many "       \
1923           "milliseconds (0 permanently, -1 disabled)")                      \
1924                                                                             \
1925   product(bool, UseCMSInitiatingOccupancyOnly, false,                       \
1926           "Only use occupancy as a criterion for starting a CMS collection")\
1927                                                                             \
1928   product(uintx, CMSIsTooFullPercentage, 98,                                \
1929           "An absolute ceiling above which CMS will always consider the "   \
1930           "unloading of classes when class unloading is enabled")           \
1931                                                                             \
1932   develop(bool, CMSTestInFreeList, false,                                   \
1933           "Check if the coalesced range is already in the "                 \
1934           "free lists as claimed")                                          \
1935                                                                             \
1936   notproduct(bool, CMSVerifyReturnedBytes, false,                           \
1937           "Check that all the garbage collected was returned to the "       \
1938           "free lists")                                                     \
1939                                                                             \
1940   notproduct(bool, ScavengeALot, false,                                     \
1941           "Force scavenge at every Nth exit from the runtime system "       \
1942           "(N=ScavengeALotInterval)")                                       \
1943                                                                             \
1944   develop(bool, FullGCALot, false,                                          \
1945           "Force full gc at every Nth exit from the runtime system "        \
1946           "(N=FullGCALotInterval)")                                         \
1947                                                                             \
1948   notproduct(bool, GCALotAtAllSafepoints, false,                            \
1949           "Enforce ScavengeALot/GCALot at all potential safepoints")        \
1950                                                                             \
1951   product(bool, PrintPromotionFailure, false,                               \
1952           "Print additional diagnostic information following "              \
1953           "promotion failure")                                              \
1954                                                                             \
1955   notproduct(bool, PromotionFailureALot, false,                             \
1956           "Use promotion failure handling on every youngest generation "    \
1957           "collection")                                                     \
1958                                                                             \
1959   develop(uintx, PromotionFailureALotCount, 1000,                           \
1960           "Number of promotion failures occurring at ParGCAllocBuffer "     \
1961           "refill attempts (ParNew) or promotion attempts "                 \
1962           "(other young collectors)")                                       \
1963                                                                             \
1964   develop(uintx, PromotionFailureALotInterval, 5,                           \
1965           "Total collections between promotion failures a lot")             \
1966                                                                             \
1967   experimental(uintx, WorkStealingSleepMillis, 1,                           \
1968           "Sleep time when sleep is used for yields")                       \
1969                                                                             \
1970   experimental(uintx, WorkStealingYieldsBeforeSleep, 5000,                  \
1971           "Number of yields before a sleep is done during work stealing")   \
1972                                                                             \
1973   experimental(uintx, WorkStealingHardSpins, 4096,                          \
1974           "Number of iterations in a spin loop between checks on "          \
1975           "time out of hard spin")                                          \
1976                                                                             \
1977   experimental(uintx, WorkStealingSpinToYieldRatio, 10,                     \
1978           "Ratio of hard spins to calls to yield")                          \
1979                                                                             \
1980   develop(uintx, ObjArrayMarkingStride, 512,                                \
1981           "Number of object array elements to push onto the marking stack " \
1982           "before pushing a continuation entry")                            \
1983                                                                             \
1984   develop(bool, MetadataAllocationFailALot, false,                          \
1985           "Fail metadata allocations at intervals controlled by "           \
1986           "MetadataAllocationFailALotInterval")                             \
1987                                                                             \
1988   develop(uintx, MetadataAllocationFailALotInterval, 1000,                  \
1989           "Metadata allocation failure a lot interval")                     \
1990                                                                             \
1991   develop(bool, TraceMetadataChunkAllocation, false,                        \
1992           "Trace chunk metadata allocations")                               \
1993                                                                             \
1994   product(bool, TraceMetadataHumongousAllocation, false,                    \
1995           "Trace humongous metadata allocations")                           \
1996                                                                             \
1997   develop(bool, TraceMetavirtualspaceAllocation, false,                     \
1998           "Trace virtual space metadata allocations")                       \
1999                                                                             \
2000   notproduct(bool, ExecuteInternalVMTests, false,                           \
2001           "Enable execution of internal VM tests")                          \
2002                                                                             \
2003   notproduct(bool, VerboseInternalVMTests, false,                           \
2004           "Turn on logging for internal VM tests.")                         \
2005                                                                             \
2006   product_pd(bool, UseTLAB, "Use thread-local object allocation")           \
2007                                                                             \
2008   product_pd(bool, ResizeTLAB,                                              \
2009           "Dynamically resize TLAB size for threads")                       \
2010                                                                             \
2011   product(bool, ZeroTLAB, false,                                            \
2012           "Zero out the newly created TLAB")                                \
2013                                                                             \
2014   product(bool, FastTLABRefill, true,                                       \
2015           "Use fast TLAB refill code")                                      \
2016                                                                             \
2017   product(bool, PrintTLAB, false,                                           \
2018           "Print various TLAB related information")                         \
2019                                                                             \
2020   product(bool, TLABStats, true,                                            \
2021           "Provide more detailed and expensive TLAB statistics "            \
2022           "(with PrintTLAB)")                                               \
2023                                                                             \
2024   EMBEDDED_ONLY(product(bool, LowMemoryProtection, true,                    \
2025           "Enable LowMemoryProtection"))                                    \
2026                                                                             \
2027   product_pd(bool, NeverActAsServerClassMachine,                            \
2028           "Never act like a server-class machine")                          \
2029                                                                             \
2030   product(bool, AlwaysActAsServerClassMachine, false,                       \
2031           "Always act like a server-class machine")                         \
2032                                                                             \
2033   product_pd(uint64_t, MaxRAM,                                              \
2034           "Real memory size (in bytes) used to set maximum heap size")      \
2035                                                                             \
2036   product(uintx, ErgoHeapSizeLimit, 0,                                      \
2037           "Maximum ergonomically set heap size (in bytes); zero means use " \
2038           "MaxRAM / MaxRAMFraction")                                        \
2039                                                                             \
2040   product(uintx, MaxRAMFraction, 4,                                         \
2041           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2042           "size")                                                           \
2043                                                                             \
2044   product(uintx, DefaultMaxRAMFraction, 4,                                  \
2045           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2046           "size; deprecated: to be renamed to MaxRAMFraction")              \
2047                                                                             \
2048   product(uintx, MinRAMFraction, 2,                                         \
2049           "Minimum fraction (1/n) of real memory used for maximum heap "    \
2050           "size on systems with small physical memory size")                \
2051                                                                             \
2052   product(uintx, InitialRAMFraction, 64,                                    \
2053           "Fraction (1/n) of real memory used for initial heap size")       \
2054                                                                             \
2055   develop(uintx, MaxVirtMemFraction, 2,                                     \
2056           "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2057           "determining maximum heap size")                                  \
2058                                                                             \
2059   product(bool, UseAutoGCSelectPolicy, false,                               \
2060           "Use automatic collection selection policy")                      \
2061                                                                             \
2062   product(uintx, AutoGCSelectPauseMillis, 5000,                             \
2063           "Automatic GC selection pause threshold in milliseconds")         \
2064                                                                             \
2065   product(bool, UseAdaptiveSizePolicy, true,                                \
2066           "Use adaptive generation sizing policies")                        \
2067                                                                             \
2068   product(bool, UsePSAdaptiveSurvivorSizePolicy, true,                      \
2069           "Use adaptive survivor sizing policies")                          \
2070                                                                             \
2071   product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true,     \
2072           "Use adaptive young-old sizing policies at minor collections")    \
2073                                                                             \
2074   product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true,     \
2075           "Use adaptive young-old sizing policies at major collections")    \
2076                                                                             \
2077   product(bool, UseAdaptiveSizePolicyWithSystemGC, false,                   \
2078           "Include statistics from System.gc() for adaptive size policy")   \
2079                                                                             \
2080   product(bool, UseAdaptiveGCBoundary, false,                               \
2081           "Allow young-old boundary to move")                               \
2082                                                                             \
2083   develop(bool, TraceAdaptiveGCBoundary, false,                             \
2084           "Trace young-old boundary moves")                                 \
2085                                                                             \
2086   develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1,             \
2087           "Resize the virtual spaces of the young or old generations")      \
2088                                                                             \
2089   product(uintx, AdaptiveSizeThroughPutPolicy, 0,                           \
2090           "Policy for changing generation size for throughput goals")       \
2091                                                                             \
2092   product(uintx, AdaptiveSizePausePolicy, 0,                                \
2093           "Policy for changing generation size for pause goals")            \
2094                                                                             \
2095   develop(bool, PSAdjustTenuredGenForMinorPause, false,                     \
2096           "Adjust tenured generation to achieve a minor pause goal")        \
2097                                                                             \
2098   develop(bool, PSAdjustYoungGenForMajorPause, false,                       \
2099           "Adjust young generation to achieve a major pause goal")          \
2100                                                                             \
2101   product(uintx, AdaptiveSizePolicyInitializingSteps, 20,                   \
2102           "Number of steps where heuristics is used before data is used")   \
2103                                                                             \
2104   develop(uintx, AdaptiveSizePolicyReadyThreshold, 5,                       \
2105           "Number of collections before the adaptive sizing is started")    \
2106                                                                             \
2107   product(uintx, AdaptiveSizePolicyOutputInterval, 0,                       \
2108           "Collection interval for printing information; zero means never") \
2109                                                                             \
2110   product(bool, UseAdaptiveSizePolicyFootprintGoal, true,                   \
2111           "Use adaptive minimum footprint as a goal")                       \
2112                                                                             \
2113   product(uintx, AdaptiveSizePolicyWeight, 10,                              \
2114           "Weight given to exponential resizing, between 0 and 100")        \
2115                                                                             \
2116   product(uintx, AdaptiveTimeWeight,       25,                              \
2117           "Weight given to time in adaptive policy, between 0 and 100")     \
2118                                                                             \
2119   product(uintx, PausePadding, 1,                                           \
2120           "How much buffer to keep for pause time")                         \
2121                                                                             \
2122   product(uintx, PromotedPadding, 3,                                        \
2123           "How much buffer to keep for promotion failure")                  \
2124                                                                             \
2125   product(uintx, SurvivorPadding, 3,                                        \
2126           "How much buffer to keep for survivor overflow")                  \
2127                                                                             \
2128   product(uintx, ThresholdTolerance, 10,                                    \
2129           "Allowed collection cost difference between generations")         \
2130                                                                             \
2131   product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50,                \
2132           "If collection costs are within margin, reduce both by full "     \
2133           "delta")                                                          \
2134                                                                             \
2135   product(uintx, YoungGenerationSizeIncrement, 20,                          \
2136           "Adaptive size percentage change in young generation")            \
2137                                                                             \
2138   product(uintx, YoungGenerationSizeSupplement, 80,                         \
2139           "Supplement to YoungedGenerationSizeIncrement used at startup")   \
2140                                                                             \
2141   product(uintx, YoungGenerationSizeSupplementDecay, 8,                     \
2142           "Decay factor to YoungedGenerationSizeSupplement")                \
2143                                                                             \
2144   product(uintx, TenuredGenerationSizeIncrement, 20,                        \
2145           "Adaptive size percentage change in tenured generation")          \
2146                                                                             \
2147   product(uintx, TenuredGenerationSizeSupplement, 80,                       \
2148           "Supplement to TenuredGenerationSizeIncrement used at startup")   \
2149                                                                             \
2150   product(uintx, TenuredGenerationSizeSupplementDecay, 2,                   \
2151           "Decay factor to TenuredGenerationSizeIncrement")                 \
2152                                                                             \
2153   product(uintx, MaxGCPauseMillis, max_uintx,                               \
2154           "Adaptive size policy maximum GC pause time goal in millisecond, "\
2155           "or (G1 Only) the maximum GC time per MMU time slice")            \
2156                                                                             \
2157   product(uintx, GCPauseIntervalMillis, 0,                                  \
2158           "Time slice for MMU specification")                               \
2159                                                                             \
2160   product(uintx, MaxGCMinorPauseMillis, max_uintx,                          \
2161           "Adaptive size policy maximum GC minor pause time goal "          \
2162           "in millisecond")                                                 \
2163                                                                             \
2164   product(uintx, GCTimeRatio, 99,                                           \
2165           "Adaptive size policy application time to GC time ratio")         \
2166                                                                             \
2167   product(uintx, AdaptiveSizeDecrementScaleFactor, 4,                       \
2168           "Adaptive size scale down factor for shrinking")                  \
2169                                                                             \
2170   product(bool, UseAdaptiveSizeDecayMajorGCCost, true,                      \
2171           "Adaptive size decays the major cost for long major intervals")   \
2172                                                                             \
2173   product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10,                     \
2174           "Time scale over which major costs decay")                        \
2175                                                                             \
2176   product(uintx, MinSurvivorRatio, 3,                                       \
2177           "Minimum ratio of young generation/survivor space size")          \
2178                                                                             \
2179   product(uintx, InitialSurvivorRatio, 8,                                   \
2180           "Initial ratio of young generation/survivor space size")          \
2181                                                                             \
2182   product(uintx, BaseFootPrintEstimate, 256*M,                              \
2183           "Estimate of footprint other than Java Heap")                     \
2184                                                                             \
2185   product(bool, UseGCOverheadLimit, true,                                   \
2186           "Use policy to limit of proportion of time spent in GC "          \
2187           "before an OutOfMemory error is thrown")                          \
2188                                                                             \
2189   product(uintx, GCTimeLimit, 98,                                           \
2190           "Limit of the proportion of time spent in GC before "             \
2191           "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)")      \
2192                                                                             \
2193   product(uintx, GCHeapFreeLimit, 2,                                        \
2194           "Minimum percentage of free space after a full GC before an "     \
2195           "OutOfMemoryError is thrown (used with GCTimeLimit)")             \
2196                                                                             \
2197   develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5,                 \
2198           "Number of consecutive collections before gc time limit fires")   \
2199                                                                             \
2200   product(bool, PrintAdaptiveSizePolicy, false,                             \
2201           "Print information about AdaptiveSizePolicy")                     \
2202                                                                             \
2203   product(intx, PrefetchCopyIntervalInBytes, -1,                            \
2204           "How far ahead to prefetch destination area (<= 0 means off)")    \
2205                                                                             \
2206   product(intx, PrefetchScanIntervalInBytes, -1,                            \
2207           "How far ahead to prefetch scan area (<= 0 means off)")           \
2208                                                                             \
2209   product(intx, PrefetchFieldsAhead, -1,                                    \
2210           "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2211                                                                             \
2212   diagnostic(bool, VerifySilently, false,                                   \
2213           "Do not print the verification progress")                         \
2214                                                                             \
2215   diagnostic(bool, VerifyDuringStartup, false,                              \
2216           "Verify memory system before executing any Java code "            \
2217           "during VM initialization")                                       \
2218                                                                             \
2219   diagnostic(bool, VerifyBeforeExit, trueInDebug,                           \
2220           "Verify system before exiting")                                   \
2221                                                                             \
2222   diagnostic(bool, VerifyBeforeGC, false,                                   \
2223           "Verify memory system before GC")                                 \
2224                                                                             \
2225   diagnostic(bool, VerifyAfterGC, false,                                    \
2226           "Verify memory system after GC")                                  \
2227                                                                             \
2228   diagnostic(bool, VerifyDuringGC, false,                                   \
2229           "Verify memory system during GC (between phases)")                \
2230                                                                             \
2231   diagnostic(bool, GCParallelVerificationEnabled, true,                     \
2232           "Enable parallel memory system verification")                     \
2233                                                                             \
2234   diagnostic(bool, DeferInitialCardMark, false,                             \
2235           "When +ReduceInitialCardMarks, explicitly defer any that "        \
2236           "may arise from new_pre_store_barrier")                           \
2237                                                                             \
2238   diagnostic(bool, VerifyRememberedSets, false,                             \
2239           "Verify GC remembered sets")                                      \
2240                                                                             \
2241   diagnostic(bool, VerifyObjectStartArray, true,                            \
2242           "Verify GC object start array if verify before/after")            \
2243                                                                             \
2244   product(bool, DisableExplicitGC, false,                                   \
2245           "Ignore calls to System.gc()")                                    \
2246                                                                             \
2247   notproduct(bool, CheckMemoryInitialization, false,                        \
2248           "Check memory initialization")                                    \
2249                                                                             \
2250   diagnostic(bool, BindCMSThreadToCPU, false,                               \
2251           "Bind CMS Thread to CPU if possible")                             \
2252                                                                             \
2253   diagnostic(uintx, CPUForCMSThread, 0,                                     \
2254           "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2255                                                                             \
2256   product(bool, BindGCTaskThreadsToCPUs, false,                             \
2257           "Bind GCTaskThreads to CPUs if possible")                         \
2258                                                                             \
2259   product(bool, UseGCTaskAffinity, false,                                   \
2260           "Use worker affinity when asking for GCTasks")                    \
2261                                                                             \
2262   product(uintx, ProcessDistributionStride, 4,                              \
2263           "Stride through processors when distributing processes")          \
2264                                                                             \
2265   product(uintx, CMSCoordinatorYieldSleepCount, 10,                         \
2266           "Number of times the coordinator GC thread will sleep while "     \
2267           "yielding before giving up and resuming GC")                      \
2268                                                                             \
2269   product(uintx, CMSYieldSleepCount, 0,                                     \
2270           "Number of times a GC thread (minus the coordinator) "            \
2271           "will sleep while yielding before giving up and resuming GC")     \
2272                                                                             \
2273   /* gc tracing */                                                          \
2274   manageable(bool, PrintGC, false,                                          \
2275           "Print message at garbage collection")                            \
2276                                                                             \
2277   manageable(bool, PrintGCDetails, false,                                   \
2278           "Print more details at garbage collection")                       \
2279                                                                             \
2280   manageable(bool, PrintGCDateStamps, false,                                \
2281           "Print date stamps at garbage collection")                        \
2282                                                                             \
2283   manageable(bool, PrintGCTimeStamps, false,                                \
2284           "Print timestamps at garbage collection")                         \
2285                                                                             \
2286   manageable(bool, PrintGCID, true,                                         \
2287           "Print an identifier for each garbage collection")                \
2288                                                                             \
2289   product(bool, PrintGCTaskTimeStamps, false,                               \
2290           "Print timestamps for individual gc worker thread tasks")         \
2291                                                                             \
2292   develop(intx, ConcGCYieldTimeout, 0,                                      \
2293           "If non-zero, assert that GC threads yield within this "          \
2294           "number of milliseconds")                                         \
2295                                                                             \
2296   notproduct(bool, TraceMarkSweep, false,                                   \
2297           "Trace mark sweep")                                               \
2298                                                                             \
2299   product(bool, PrintReferenceGC, false,                                    \
2300           "Print times spent handling reference objects during GC "         \
2301           "(enabled only when PrintGCDetails)")                             \
2302                                                                             \
2303   develop(bool, TraceReferenceGC, false,                                    \
2304           "Trace handling of soft/weak/final/phantom references")           \
2305                                                                             \
2306   develop(bool, TraceFinalizerRegistration, false,                          \
2307           "Trace registration of final references")                         \
2308                                                                             \
2309   notproduct(bool, TraceScavenge, false,                                    \
2310           "Trace scavenge")                                                 \
2311                                                                             \
2312   product(bool, IgnoreEmptyClassPaths, false,                               \
2313           "Ignore empty path elements in -classpath")                       \
2314                                                                             \
2315   product(bool, TraceClassPaths, false,                                     \
2316           "Trace processing of class paths")                                \
2317                                                                             \
2318   product_rw(bool, TraceClassLoading, false,                                \
2319           "Trace all classes loaded")                                       \
2320                                                                             \
2321   product(bool, TraceClassLoadingPreorder, false,                           \
2322           "Trace all classes loaded in order referenced (not loaded)")      \
2323                                                                             \
2324   product_rw(bool, TraceClassUnloading, false,                              \
2325           "Trace unloading of classes")                                     \
2326                                                                             \
2327   product_rw(bool, TraceLoaderConstraints, false,                           \
2328           "Trace loader constraints")                                       \
2329                                                                             \
2330   develop(bool, TraceClassLoaderData, false,                                \
2331           "Trace class loader loader_data lifetime")                        \
2332                                                                             \
2333   product(uintx, InitialBootClassLoaderMetaspaceSize,                       \
2334           NOT_LP64(2200*K) LP64_ONLY(4*M),                                  \
2335           "Initial size of the boot class loader data metaspace")           \
2336                                                                             \
2337   product(bool, TraceYoungGenTime, false,                                   \
2338           "Trace accumulated time for young collection")                    \
2339                                                                             \
2340   product(bool, TraceOldGenTime, false,                                     \
2341           "Trace accumulated time for old collection")                      \
2342                                                                             \
2343   product(bool, PrintTenuringDistribution, false,                           \
2344           "Print tenuring age information")                                 \
2345                                                                             \
2346   product_rw(bool, PrintHeapAtGC, false,                                    \
2347           "Print heap layout before and after each GC")                     \
2348                                                                             \
2349   product_rw(bool, PrintHeapAtGCExtended, false,                            \
2350           "Print extended information about the layout of the heap "        \
2351           "when -XX:+PrintHeapAtGC is set")                                 \
2352                                                                             \
2353   product(bool, PrintHeapAtSIGBREAK, true,                                  \
2354           "Print heap layout in response to SIGBREAK")                      \
2355                                                                             \
2356   manageable(bool, PrintClassHistogramBeforeFullGC, false,                  \
2357           "Print a class histogram before any major stop-world GC")         \
2358                                                                             \
2359   manageable(bool, PrintClassHistogramAfterFullGC, false,                   \
2360           "Print a class histogram after any major stop-world GC")          \
2361                                                                             \
2362   manageable(bool, PrintClassHistogram, false,                              \
2363           "Print a histogram of class instances")                           \
2364                                                                             \
2365   develop(bool, TraceWorkGang, false,                                       \
2366           "Trace activities of work gangs")                                 \
2367                                                                             \
2368   product(bool, TraceParallelOldGCTasks, false,                             \
2369           "Trace multithreaded GC activity")                                \
2370                                                                             \
2371   develop(bool, TraceBlockOffsetTable, false,                               \
2372           "Print BlockOffsetTable maps")                                    \
2373                                                                             \
2374   develop(bool, TraceCardTableModRefBS, false,                              \
2375           "Print CardTableModRefBS maps")                                   \
2376                                                                             \
2377   develop(bool, TraceGCTaskManager, false,                                  \
2378           "Trace actions of the GC task manager")                           \
2379                                                                             \
2380   develop(bool, TraceGCTaskQueue, false,                                    \
2381           "Trace actions of the GC task queues")                            \
2382                                                                             \
2383   diagnostic(bool, TraceGCTaskThread, false,                                \
2384           "Trace actions of the GC task threads")                           \
2385                                                                             \
2386   product(bool, PrintParallelOldGCPhaseTimes, false,                        \
2387           "Print the time taken by each phase in ParallelOldGC "            \
2388           "(PrintGCDetails must also be enabled)")                          \
2389                                                                             \
2390   develop(bool, TraceParallelOldGCMarkingPhase, false,                      \
2391           "Trace marking phase in ParallelOldGC")                           \
2392                                                                             \
2393   develop(bool, TraceParallelOldGCSummaryPhase, false,                      \
2394           "Trace summary phase in ParallelOldGC")                           \
2395                                                                             \
2396   develop(bool, TraceParallelOldGCCompactionPhase, false,                   \
2397           "Trace compaction phase in ParallelOldGC")                        \
2398                                                                             \
2399   develop(bool, TraceParallelOldGCDensePrefix, false,                       \
2400           "Trace dense prefix computation for ParallelOldGC")               \
2401                                                                             \
2402   develop(bool, IgnoreLibthreadGPFault, false,                              \
2403           "Suppress workaround for libthread GP fault")                     \
2404                                                                             \
2405   product(bool, PrintJNIGCStalls, false,                                    \
2406           "Print diagnostic message when GC is stalled "                    \
2407           "by JNI critical section")                                        \
2408                                                                             \
2409   experimental(double, ObjectCountCutOffPercent, 0.5,                       \
2410           "The percentage of the used heap that the instances of a class "  \
2411           "must occupy for the class to generate a trace event")            \
2412                                                                             \
2413   /* GC log rotation setting */                                             \
2414                                                                             \
2415   product(bool, UseGCLogFileRotation, false,                                \
2416           "Rotate gclog files (for long running applications). It requires "\
2417           "-Xloggc:<filename>")                                             \
2418                                                                             \
2419   product(uintx, NumberOfGCLogFiles, 0,                                     \
2420           "Number of gclog files in rotation "                              \
2421           "(default: 0, no rotation)")                                      \
2422                                                                             \
2423   product(uintx, GCLogFileSize, 8*K,                                        \
2424           "GC log file size, requires UseGCLogFileRotation. "               \
2425           "Set to 0 to only trigger rotation via jcmd")                     \
2426                                                                             \
2427   /* JVMTI heap profiling */                                                \
2428                                                                             \
2429   diagnostic(bool, TraceJVMTIObjectTagging, false,                          \
2430           "Trace JVMTI object tagging calls")                               \
2431                                                                             \
2432   diagnostic(bool, VerifyBeforeIteration, false,                            \
2433           "Verify memory system before JVMTI iteration")                    \
2434                                                                             \
2435   /* compiler interface */                                                  \
2436                                                                             \
2437   develop(bool, CIPrintCompilerName, false,                                 \
2438           "when CIPrint is active, print the name of the active compiler")  \
2439                                                                             \
2440   diagnostic(bool, CIPrintCompileQueue, false,                              \
2441           "display the contents of the compile queue whenever a "           \
2442           "compilation is enqueued")                                        \
2443                                                                             \
2444   develop(bool, CIPrintRequests, false,                                     \
2445           "display every request for compilation")                          \
2446                                                                             \
2447   product(bool, CITime, false,                                              \
2448           "collect timing information for compilation")                     \
2449                                                                             \
2450   develop(bool, CITimeVerbose, false,                                       \
2451           "be more verbose in compilation timings")                         \
2452                                                                             \
2453   develop(bool, CITimeEach, false,                                          \
2454           "display timing information after each successful compilation")   \
2455                                                                             \
2456   develop(bool, CICountOSR, false,                                          \
2457           "use a separate counter when assigning ids to osr compilations")  \
2458                                                                             \
2459   develop(bool, CICompileNatives, true,                                     \
2460           "compile native methods if supported by the compiler")            \
2461                                                                             \
2462   develop_pd(bool, CICompileOSR,                                            \
2463           "compile on stack replacement methods if supported by the "       \
2464           "compiler")                                                       \
2465                                                                             \
2466   develop(bool, CIPrintMethodCodes, false,                                  \
2467           "print method bytecodes of the compiled code")                    \
2468                                                                             \
2469   develop(bool, CIPrintTypeFlow, false,                                     \
2470           "print the results of ciTypeFlow analysis")                       \
2471                                                                             \
2472   develop(bool, CITraceTypeFlow, false,                                     \
2473           "detailed per-bytecode tracing of ciTypeFlow analysis")           \
2474                                                                             \
2475   develop(intx, OSROnlyBCI, -1,                                             \
2476           "OSR only at this bci.  Negative values mean exclude that bci")   \
2477                                                                             \
2478   /* compiler */                                                            \
2479                                                                             \
2480   product(intx, CICompilerCount, CI_COMPILER_COUNT,                         \
2481           "Number of compiler threads to run")                              \
2482                                                                             \
2483   product(intx, CompilationPolicyChoice, 0,                                 \
2484           "which compilation policy (0/1)")                                 \
2485                                                                             \
2486   develop(bool, UseStackBanging, true,                                      \
2487           "use stack banging for stack overflow checks (required for "      \
2488           "proper StackOverflow handling; disable only to measure cost "    \
2489           "of stackbanging)")                                               \
2490                                                                             \
2491   develop(bool, UseStrictFP, true,                                          \
2492           "use strict fp if modifier strictfp is set")                      \
2493                                                                             \
2494   develop(bool, GenerateSynchronizationCode, true,                          \
2495           "generate locking/unlocking code for synchronized methods and "   \
2496           "monitors")                                                       \
2497                                                                             \
2498   develop(bool, GenerateCompilerNullChecks, true,                           \
2499           "Generate explicit null checks for loads/stores/calls")           \
2500                                                                             \
2501   develop(bool, GenerateRangeChecks, true,                                  \
2502           "Generate range checks for array accesses")                       \
2503                                                                             \
2504   develop_pd(bool, ImplicitNullChecks,                                      \
2505           "Generate code for implicit null checks")                         \
2506                                                                             \
2507   product_pd(bool, TrapBasedNullChecks,                                     \
2508           "Generate code for null checks that uses a cmp and trap "         \
2509           "instruction raising SIGTRAP.  This is only used if an access to" \
2510           "null (+offset) will not raise a SIGSEGV, i.e.,"                  \
2511           "ImplicitNullChecks don't work (PPC64).")                         \
2512                                                                             \
2513   product(bool, PrintSafepointStatistics, false,                            \
2514           "Print statistics about safepoint synchronization")               \
2515                                                                             \
2516   product(intx, PrintSafepointStatisticsCount, 300,                         \
2517           "Total number of safepoint statistics collected "                 \
2518           "before printing them out")                                       \
2519                                                                             \
2520   product(intx, PrintSafepointStatisticsTimeout,  -1,                       \
2521           "Print safepoint statistics only when safepoint takes "           \
2522           "more than PrintSafepointSatisticsTimeout in millis")             \
2523                                                                             \
2524   product(bool, TraceSafepointCleanupTime, false,                           \
2525           "Print the break down of clean up tasks performed during "        \
2526           "safepoint")                                                      \
2527                                                                             \
2528   product(bool, Inline, true,                                               \
2529           "Enable inlining")                                                \
2530                                                                             \
2531   product(bool, ClipInlining, true,                                         \
2532           "Clip inlining if aggregate method exceeds DesiredMethodLimit")   \
2533                                                                             \
2534   develop(bool, UseCHA, true,                                               \
2535           "Enable CHA")                                                     \
2536                                                                             \
2537   product(bool, UseTypeProfile, true,                                       \
2538           "Check interpreter profile for historically monomorphic calls")   \
2539                                                                             \
2540   diagnostic(bool, PrintInlining, false,                                    \
2541           "Print inlining optimizations")                                   \
2542                                                                             \
2543   product(bool, UsePopCountInstruction, false,                              \
2544           "Use population count instruction")                               \
2545                                                                             \
2546   develop(bool, EagerInitialization, false,                                 \
2547           "Eagerly initialize classes if possible")                         \
2548                                                                             \
2549   develop(bool, TraceMethodReplacement, false,                              \
2550           "Print when methods are replaced do to recompilation")            \
2551                                                                             \
2552   develop(bool, PrintMethodFlushing, false,                                 \
2553           "Print the nmethods being flushed")                               \
2554                                                                             \
2555   diagnostic(bool, PrintMethodFlushingStatistics, false,                    \
2556           "print statistics about method flushing")                         \
2557                                                                             \
2558   diagnostic(intx, HotMethodDetectionLimit, 100000,                         \
2559           "Number of compiled code invocations after which "                \
2560           "the method is considered as hot by the flusher")                 \
2561                                                                             \
2562   diagnostic(intx, MinPassesBeforeFlush, 10,                                \
2563           "Minimum number of sweeper passes before an nmethod "             \
2564           "can be flushed")                                                 \
2565                                                                             \
2566   product(bool, UseCodeAging, true,                                         \
2567           "Insert counter to detect warm methods")                          \
2568                                                                             \
2569   diagnostic(bool, StressCodeAging, false,                                  \
2570           "Start with counters compiled in")                                \
2571                                                                             \
2572   develop(bool, UseRelocIndex, false,                                       \
2573           "Use an index to speed random access to relocations")             \
2574                                                                             \
2575   develop(bool, StressCodeBuffers, false,                                   \
2576           "Exercise code buffer expansion and other rare state changes")    \
2577                                                                             \
2578   diagnostic(bool, DebugNonSafepoints, trueInDebug,                         \
2579           "Generate extra debugging information for non-safepoints in "     \
2580           "nmethods")                                                       \
2581                                                                             \
2582   product(bool, PrintVMOptions, false,                                      \
2583           "Print flags that appeared on the command line")                  \
2584                                                                             \
2585   product(bool, IgnoreUnrecognizedVMOptions, false,                         \
2586           "Ignore unrecognized VM options")                                 \
2587                                                                             \
2588   product(bool, PrintCommandLineFlags, false,                               \
2589           "Print flags specified on command line or set by ergonomics")     \
2590                                                                             \
2591   product(bool, PrintFlagsInitial, false,                                   \
2592           "Print all VM flags before argument processing and exit VM")      \
2593                                                                             \
2594   product(bool, PrintFlagsFinal, false,                                     \
2595           "Print all VM flags after argument and ergonomic processing")     \
2596                                                                             \
2597   notproduct(bool, PrintFlagsWithComments, false,                           \
2598           "Print all VM flags with default values and descriptions and "    \
2599           "exit")                                                           \
2600                                                                             \
2601   diagnostic(bool, SerializeVMOutput, true,                                 \
2602           "Use a mutex to serialize output to tty and LogFile")             \
2603                                                                             \
2604   diagnostic(bool, DisplayVMOutput, true,                                   \
2605           "Display all VM output on the tty, independently of LogVMOutput") \
2606                                                                             \
2607   diagnostic(bool, LogVMOutput, false,                                      \
2608           "Save VM output to LogFile")                                      \
2609                                                                             \
2610   diagnostic(ccstr, LogFile, NULL,                                          \
2611           "If LogVMOutput or LogCompilation is on, save VM output to "      \
2612           "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2613                                                                             \
2614   product(ccstr, ErrorFile, NULL,                                           \
2615           "If an error occurs, save the error data to this file "           \
2616           "[default: ./hs_err_pid%p.log] (%p replaced with pid)")           \
2617                                                                             \
2618   product(bool, DisplayVMOutputToStderr, false,                             \
2619           "If DisplayVMOutput is true, display all VM output to stderr")    \
2620                                                                             \
2621   product(bool, DisplayVMOutputToStdout, false,                             \
2622           "If DisplayVMOutput is true, display all VM output to stdout")    \
2623                                                                             \
2624   product(bool, UseHeavyMonitors, false,                                    \
2625           "use heavyweight instead of lightweight Java monitors")           \
2626                                                                             \
2627   product(bool, PrintStringTableStatistics, false,                          \
2628           "print statistics about the StringTable and SymbolTable")         \
2629                                                                             \
2630   diagnostic(bool, VerifyStringTableAtExit, false,                          \
2631           "verify StringTable contents at exit")                            \
2632                                                                             \
2633   notproduct(bool, PrintSymbolTableSizeHistogram, false,                    \
2634           "print histogram of the symbol table")                            \
2635                                                                             \
2636   notproduct(bool, ExitVMOnVerifyError, false,                              \
2637           "standard exit from VM if bytecode verify error "                 \
2638           "(only in debug mode)")                                           \
2639                                                                             \
2640   notproduct(ccstr, AbortVMOnException, NULL,                               \
2641           "Call fatal if this exception is thrown.  Example: "              \
2642           "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2643                                                                             \
2644   notproduct(ccstr, AbortVMOnExceptionMessage, NULL,                        \
2645           "Call fatal if the exception pointed by AbortVMOnException "      \
2646           "has this message")                                               \
2647                                                                             \
2648   develop(bool, DebugVtables, false,                                        \
2649           "add debugging code to vtable dispatch")                          \
2650                                                                             \
2651   develop(bool, PrintVtables, false,                                        \
2652           "print vtables when printing klass")                              \
2653                                                                             \
2654   notproduct(bool, PrintVtableStats, false,                                 \
2655           "print vtables stats at end of run")                              \
2656                                                                             \
2657   develop(bool, TraceCreateZombies, false,                                  \
2658           "trace creation of zombie nmethods")                              \
2659                                                                             \
2660   notproduct(bool, IgnoreLockingAssertions, false,                          \
2661           "disable locking assertions (for speed)")                         \
2662                                                                             \
2663   product(bool, RangeCheckElimination, true,                                \
2664           "Eliminate range checks")                                         \
2665                                                                             \
2666   develop_pd(bool, UncommonNullCast,                                        \
2667           "track occurrences of null in casts; adjust compiler tactics")    \
2668                                                                             \
2669   develop(bool, TypeProfileCasts,  true,                                    \
2670           "treat casts like calls for purposes of type profiling")          \
2671                                                                             \
2672   develop(bool, DelayCompilationDuringStartup, true,                        \
2673           "Delay invoking the compiler until main application class is "    \
2674           "loaded")                                                         \
2675                                                                             \
2676   develop(bool, CompileTheWorld, false,                                     \
2677           "Compile all methods in all classes in bootstrap class path "     \
2678           "(stress test)")                                                  \
2679                                                                             \
2680   develop(bool, CompileTheWorldPreloadClasses, true,                        \
2681           "Preload all classes used by a class before start loading")       \
2682                                                                             \
2683   notproduct(intx, CompileTheWorldSafepointInterval, 100,                   \
2684           "Force a safepoint every n compiles so sweeper can keep up")      \
2685                                                                             \
2686   develop(bool, FillDelaySlots, true,                                       \
2687           "Fill delay slots (on SPARC only)")                               \
2688                                                                             \
2689   develop(bool, TimeLivenessAnalysis, false,                                \
2690           "Time computation of bytecode liveness analysis")                 \
2691                                                                             \
2692   develop(bool, TraceLivenessGen, false,                                    \
2693           "Trace the generation of liveness analysis information")          \
2694                                                                             \
2695   notproduct(bool, TraceLivenessQuery, false,                               \
2696           "Trace queries of liveness analysis information")                 \
2697                                                                             \
2698   notproduct(bool, CollectIndexSetStatistics, false,                        \
2699           "Collect information about IndexSets")                            \
2700                                                                             \
2701   develop(bool, UseLoopSafepoints, true,                                    \
2702           "Generate Safepoint nodes in every loop")                         \
2703                                                                             \
2704   develop(intx, FastAllocateSizeLimit, 128*K,                               \
2705           /* Note:  This value is zero mod 1<<13 for a cheap sparc set. */  \
2706           "Inline allocations larger than this in doublewords must go slow")\
2707                                                                             \
2708   product(bool, AggressiveOpts, false,                                      \
2709           "Enable aggressive optimizations - see arguments.cpp")            \
2710                                                                             \
2711   product_pd(uintx, TypeProfileLevel,                                       \
2712           "=XYZ, with Z: Type profiling of arguments at call; "             \
2713                      "Y: Type profiling of return value at call; "          \
2714                      "X: Type profiling of parameters to methods; "         \
2715           "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods")             \
2716                                                                             \
2717   product(intx, TypeProfileArgsLimit,     2,                                \
2718           "max number of call arguments to consider for type profiling")    \
2719                                                                             \
2720   product(intx, TypeProfileParmsLimit,    2,                                \
2721           "max number of incoming parameters to consider for type profiling"\
2722           ", -1 for all")                                                   \
2723                                                                             \
2724   /* statistics */                                                          \
2725   develop(bool, CountCompiledCalls, false,                                  \
2726           "Count method invocations")                                       \
2727                                                                             \
2728   notproduct(bool, CountRuntimeCalls, false,                                \
2729           "Count VM runtime calls")                                         \
2730                                                                             \
2731   develop(bool, CountJNICalls, false,                                       \
2732           "Count jni method invocations")                                   \
2733                                                                             \
2734   notproduct(bool, CountJVMCalls, false,                                    \
2735           "Count jvm method invocations")                                   \
2736                                                                             \
2737   notproduct(bool, CountRemovableExceptions, false,                         \
2738           "Count exceptions that could be replaced by branches due to "     \
2739           "inlining")                                                       \
2740                                                                             \
2741   notproduct(bool, ICMissHistogram, false,                                  \
2742           "Produce histogram of IC misses")                                 \
2743                                                                             \
2744   notproduct(bool, PrintClassStatistics, false,                             \
2745           "Print class statistics at end of run")                           \
2746                                                                             \
2747   notproduct(bool, PrintMethodStatistics, false,                            \
2748           "Print method statistics at end of run")                          \
2749                                                                             \
2750   /* interpreter */                                                         \
2751   develop(bool, ClearInterpreterLocals, false,                              \
2752           "Always clear local variables of interpreter activations upon "   \
2753           "entry")                                                          \
2754                                                                             \
2755   product_pd(bool, RewriteBytecodes,                                        \
2756           "Allow rewriting of bytecodes (bytecodes are not immutable)")     \
2757                                                                             \
2758   product_pd(bool, RewriteFrequentPairs,                                    \
2759           "Rewrite frequently used bytecode pairs into a single bytecode")  \
2760                                                                             \
2761   diagnostic(bool, PrintInterpreter, false,                                 \
2762           "Print the generated interpreter code")                           \
2763                                                                             \
2764   product(bool, UseInterpreter, true,                                       \
2765           "Use interpreter for non-compiled methods")                       \
2766                                                                             \
2767   develop(bool, UseFastSignatureHandlers, true,                             \
2768           "Use fast signature handlers for native calls")                   \
2769                                                                             \
2770   product(bool, UseLoopCounter, true,                                       \
2771           "Increment invocation counter on backward branch")                \
2772                                                                             \
2773   product_pd(bool, UseOnStackReplacement,                                   \
2774           "Use on stack replacement, calls runtime if invoc. counter "      \
2775           "overflows in loop")                                              \
2776                                                                             \
2777   notproduct(bool, TraceOnStackReplacement, false,                          \
2778           "Trace on stack replacement")                                     \
2779                                                                             \
2780   product_pd(bool, PreferInterpreterNativeStubs,                            \
2781           "Use always interpreter stubs for native methods invoked via "    \
2782           "interpreter")                                                    \
2783                                                                             \
2784   develop(bool, CountBytecodes, false,                                      \
2785           "Count number of bytecodes executed")                             \
2786                                                                             \
2787   develop(bool, PrintBytecodeHistogram, false,                              \
2788           "Print histogram of the executed bytecodes")                      \
2789                                                                             \
2790   develop(bool, PrintBytecodePairHistogram, false,                          \
2791           "Print histogram of the executed bytecode pairs")                 \
2792                                                                             \
2793   diagnostic(bool, PrintSignatureHandlers, false,                           \
2794           "Print code generated for native method signature handlers")      \
2795                                                                             \
2796   develop(bool, VerifyOops, false,                                          \
2797           "Do plausibility checks for oops")                                \
2798                                                                             \
2799   develop(bool, CheckUnhandledOops, false,                                  \
2800           "Check for unhandled oops in VM code")                            \
2801                                                                             \
2802   develop(bool, VerifyJNIFields, trueInDebug,                               \
2803           "Verify jfieldIDs for instance fields")                           \
2804                                                                             \
2805   notproduct(bool, VerifyJNIEnvThread, false,                               \
2806           "Verify JNIEnv.thread == Thread::current() when entering VM "     \
2807           "from JNI")                                                       \
2808                                                                             \
2809   develop(bool, VerifyFPU, false,                                           \
2810           "Verify FPU state (check for NaN's, etc.)")                       \
2811                                                                             \
2812   develop(bool, VerifyThread, false,                                        \
2813           "Watch the thread register for corruption (SPARC only)")          \
2814                                                                             \
2815   develop(bool, VerifyActivationFrameSize, false,                           \
2816           "Verify that activation frame didn't become smaller than its "    \
2817           "minimal size")                                                   \
2818                                                                             \
2819   develop(bool, TraceFrequencyInlining, false,                              \
2820           "Trace frequency based inlining")                                 \
2821                                                                             \
2822   develop_pd(bool, InlineIntrinsics,                                        \
2823           "Inline intrinsics that can be statically resolved")              \
2824                                                                             \
2825   product_pd(bool, ProfileInterpreter,                                      \
2826           "Profile at the bytecode level during interpretation")            \
2827                                                                             \
2828   develop(bool, TraceProfileInterpreter, false,                             \
2829           "Trace profiling at the bytecode level during interpretation. "   \
2830           "This outputs the profiling information collected to improve "    \
2831           "jit compilation.")                                               \
2832                                                                             \
2833   develop_pd(bool, ProfileTraps,                                            \
2834           "Profile deoptimization traps at the bytecode level")             \
2835                                                                             \
2836   product(intx, ProfileMaturityPercentage, 20,                              \
2837           "number of method invocations/branches (expressed as % of "       \
2838           "CompileThreshold) before using the method's profile")            \
2839                                                                             \
2840   diagnostic(bool, PrintMethodData, false,                                  \
2841           "Print the results of +ProfileInterpreter at end of run")         \
2842                                                                             \
2843   develop(bool, VerifyDataPointer, trueInDebug,                             \
2844           "Verify the method data pointer during interpreter profiling")    \
2845                                                                             \
2846   develop(bool, VerifyCompiledCode, false,                                  \
2847           "Include miscellaneous runtime verifications in nmethod code; "   \
2848           "default off because it disturbs nmethod size heuristics")        \
2849                                                                             \
2850   notproduct(bool, CrashGCForDumpingJavaThread, false,                      \
2851           "Manually make GC thread crash then dump java stack trace;  "     \
2852           "Test only")                                                      \
2853                                                                             \
2854   /* compilation */                                                         \
2855   product(bool, UseCompiler, true,                                          \
2856           "Use Just-In-Time compilation")                                   \
2857                                                                             \
2858   develop(bool, TraceCompilationPolicy, false,                              \
2859           "Trace compilation policy")                                       \
2860                                                                             \
2861   develop(bool, TimeCompilationPolicy, false,                               \
2862           "Time the compilation policy")                                    \
2863                                                                             \
2864   product(bool, UseCounterDecay, true,                                      \
2865           "Adjust recompilation counters")                                  \
2866                                                                             \
2867   develop(intx, CounterHalfLifeTime,    30,                                 \
2868           "Half-life time of invocation counters (in seconds)")             \
2869                                                                             \
2870   develop(intx, CounterDecayMinIntervalLength,   500,                       \
2871           "The minimum interval (in milliseconds) between invocation of "   \
2872           "CounterDecay")                                                   \
2873                                                                             \
2874   product(bool, AlwaysCompileLoopMethods, false,                            \
2875           "When using recompilation, never interpret methods "              \
2876           "containing loops")                                               \
2877                                                                             \
2878   product(bool, DontCompileHugeMethods, true,                               \
2879           "Do not compile methods > HugeMethodLimit")                       \
2880                                                                             \
2881   /* Bytecode escape analysis estimation. */                                \
2882   product(bool, EstimateArgEscape, true,                                    \
2883           "Analyze bytecodes to estimate escape state of arguments")        \
2884                                                                             \
2885   product(intx, BCEATraceLevel, 0,                                          \
2886           "How much tracing to do of bytecode escape analysis estimates")   \
2887                                                                             \
2888   product(intx, MaxBCEAEstimateLevel, 5,                                    \
2889           "Maximum number of nested calls that are analyzed by BC EA")      \
2890                                                                             \
2891   product(intx, MaxBCEAEstimateSize, 150,                                   \
2892           "Maximum bytecode size of a method to be analyzed by BC EA")      \
2893                                                                             \
2894   product(intx,  AllocatePrefetchStyle, 1,                                  \
2895           "0 = no prefetch, "                                               \
2896           "1 = prefetch instructions for each allocation, "                 \
2897           "2 = use TLAB watermark to gate allocation prefetch, "            \
2898           "3 = use BIS instruction on Sparc for allocation prefetch")       \
2899                                                                             \
2900   product(intx,  AllocatePrefetchDistance, -1,                              \
2901           "Distance to prefetch ahead of allocation pointer")               \
2902                                                                             \
2903   product(intx,  AllocatePrefetchLines, 3,                                  \
2904           "Number of lines to prefetch ahead of array allocation pointer")  \
2905                                                                             \
2906   product(intx,  AllocateInstancePrefetchLines, 1,                          \
2907           "Number of lines to prefetch ahead of instance allocation "       \
2908           "pointer")                                                        \
2909                                                                             \
2910   product(intx,  AllocatePrefetchStepSize, 16,                              \
2911           "Step size in bytes of sequential prefetch instructions")         \
2912                                                                             \
2913   product(intx,  AllocatePrefetchInstr, 0,                                  \
2914           "Prefetch instruction to prefetch ahead of allocation pointer")   \
2915                                                                             \
2916   /* deoptimization */                                                      \
2917   develop(bool, TraceDeoptimization, false,                                 \
2918           "Trace deoptimization")                                           \
2919                                                                             \
2920   develop(bool, DebugDeoptimization, false,                                 \
2921           "Tracing various information while debugging deoptimization")     \
2922                                                                             \
2923   product(intx, SelfDestructTimer, 0,                                       \
2924           "Will cause VM to terminate after a given time (in minutes) "     \
2925           "(0 means off)")                                                  \
2926                                                                             \
2927   product(intx, MaxJavaStackTraceDepth, 1024,                               \
2928           "The maximum number of lines in the stack trace for Java "        \
2929           "exceptions (0 means all)")                                       \
2930                                                                             \
2931   NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000,          \
2932           "Guarantee a safepoint (at least) every so many milliseconds "    \
2933           "(0 means none)"))                                                \
2934                                                                             \
2935   EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0,               \
2936           "Guarantee a safepoint (at least) every so many milliseconds "    \
2937           "(0 means none)"))                                                \
2938                                                                             \
2939   product(intx, SafepointTimeoutDelay, 10000,                               \
2940           "Delay in milliseconds for option SafepointTimeout")              \
2941                                                                             \
2942   product(intx, NmethodSweepActivity, 10,                                   \
2943           "Removes cold nmethods from code cache if > 0. Higher values "    \
2944           "result in more aggressive sweeping")                             \
2945                                                                             \
2946   notproduct(bool, LogSweeper, false,                                       \
2947           "Keep a ring buffer of sweeper activity")                         \
2948                                                                             \
2949   notproduct(intx, SweeperLogEntries, 1024,                                 \
2950           "Number of records in the ring buffer of sweeper activity")       \
2951                                                                             \
2952   notproduct(intx, MemProfilingInterval, 500,                               \
2953           "Time between each invocation of the MemProfiler")                \
2954                                                                             \
2955   develop(intx, MallocCatchPtr, -1,                                         \
2956           "Hit breakpoint when mallocing/freeing this pointer")             \
2957                                                                             \
2958   notproduct(intx, AssertRepeat, 1,                                         \
2959           "number of times to evaluate expression in assert "               \
2960           "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2961                                                                             \
2962   notproduct(ccstrlist, SuppressErrorAt, "",                                \
2963           "List of assertions (file:line) to muzzle")                       \
2964                                                                             \
2965   notproduct(uintx, HandleAllocationLimit, 1024,                            \
2966           "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2967           "is used")                                                        \
2968                                                                             \
2969   develop(uintx, TotalHandleAllocationLimit, 1024,                          \
2970           "Threshold for total handle allocation when "                     \
2971           "+TraceHandleAllocation is used")                                 \
2972                                                                             \
2973   develop(intx, StackPrintLimit, 100,                                       \
2974           "number of stack frames to print in VM-level stack dump")         \
2975                                                                             \
2976   notproduct(intx, MaxElementPrintSize, 256,                                \
2977           "maximum number of elements to print")                            \
2978                                                                             \
2979   notproduct(intx, MaxSubklassPrintSize, 4,                                 \
2980           "maximum number of subklasses to print when printing klass")      \
2981                                                                             \
2982   product(intx, MaxInlineLevel, 9,                                          \
2983           "maximum number of nested calls that are inlined")                \
2984                                                                             \
2985   product(intx, MaxRecursiveInlineLevel, 1,                                 \
2986           "maximum number of nested recursive calls that are inlined")      \
2987                                                                             \
2988   develop(intx, MaxForceInlineLevel, 100,                                   \
2989           "maximum number of nested calls that are forced for inlining "    \
2990           "(using CompilerOracle or marked w/ @ForceInline)")               \
2991                                                                             \
2992   product_pd(intx, InlineSmallCode,                                         \
2993           "Only inline already compiled methods if their code size is "     \
2994           "less than this")                                                 \
2995                                                                             \
2996   product(intx, MaxInlineSize, 35,                                          \
2997           "The maximum bytecode size of a method to be inlined")            \
2998                                                                             \
2999   product_pd(intx, FreqInlineSize,                                          \
3000           "The maximum bytecode size of a frequent method to be inlined")   \
3001                                                                             \
3002   product(intx, MaxTrivialSize, 6,                                          \
3003           "The maximum bytecode size of a trivial method to be inlined")    \
3004                                                                             \
3005   product(intx, MinInliningThreshold, 250,                                  \
3006           "The minimum invocation count a method needs to have to be "      \
3007           "inlined")                                                        \
3008                                                                             \
3009   develop(intx, MethodHistogramCutoff, 100,                                 \
3010           "The cutoff value for method invocation histogram (+CountCalls)") \
3011                                                                             \
3012   develop(intx, ProfilerNumberOfInterpretedMethods, 25,                     \
3013           "Number of interpreted methods to show in profile")               \
3014                                                                             \
3015   develop(intx, ProfilerNumberOfCompiledMethods, 25,                        \
3016           "Number of compiled methods to show in profile")                  \
3017                                                                             \
3018   develop(intx, ProfilerNumberOfStubMethods, 25,                            \
3019           "Number of stub methods to show in profile")                      \
3020                                                                             \
3021   develop(intx, ProfilerNumberOfRuntimeStubNodes, 25,                       \
3022           "Number of runtime stub nodes to show in profile")                \
3023                                                                             \
3024   product(intx, ProfileIntervalsTicks, 100,                                 \
3025           "Number of ticks between printing of interval profile "           \
3026           "(+ProfileIntervals)")                                            \
3027                                                                             \
3028   notproduct(intx, ScavengeALotInterval,     1,                             \
3029           "Interval between which scavenge will occur with +ScavengeALot")  \
3030                                                                             \
3031   notproduct(intx, FullGCALotInterval,     1,                               \
3032           "Interval between which full gc will occur with +FullGCALot")     \
3033                                                                             \
3034   notproduct(intx, FullGCALotStart,     0,                                  \
3035           "For which invocation to start FullGCAlot")                       \
3036                                                                             \
3037   notproduct(intx, FullGCALotDummies,  32*K,                                \
3038           "Dummy object allocated with +FullGCALot, forcing all objects "   \
3039           "to move")                                                        \
3040                                                                             \
3041   develop(intx, DontYieldALotInterval,    10,                               \
3042           "Interval between which yields will be dropped (milliseconds)")   \
3043                                                                             \
3044   develop(intx, MinSleepInterval,     1,                                    \
3045           "Minimum sleep() interval (milliseconds) when "                   \
3046           "ConvertSleepToYield is off (used for Solaris)")                  \
3047                                                                             \
3048   develop(intx, ProfilerPCTickThreshold,    15,                             \
3049           "Number of ticks in a PC buckets to be a hotspot")                \
3050                                                                             \
3051   notproduct(intx, DeoptimizeALotInterval,     5,                           \
3052           "Number of exits until DeoptimizeALot kicks in")                  \
3053                                                                             \
3054   notproduct(intx, ZombieALotInterval,     5,                               \
3055           "Number of exits until ZombieALot kicks in")                      \
3056                                                                             \
3057   diagnostic(intx, MallocVerifyInterval,     0,                             \
3058           "If non-zero, verify C heap after every N calls to "              \
3059           "malloc/realloc/free")                                            \
3060                                                                             \
3061   diagnostic(intx, MallocVerifyStart,     0,                                \
3062           "If non-zero, start verifying C heap after Nth call to "          \
3063           "malloc/realloc/free")                                            \
3064                                                                             \
3065   diagnostic(uintx, MallocMaxTestWords,     0,                              \
3066           "If non-zero, maximum number of words that malloc/realloc can "   \
3067           "allocate (for testing only)")                                    \
3068                                                                             \
3069   product(intx, TypeProfileWidth,     2,                                    \
3070           "Number of receiver types to record in call/cast profile")        \
3071                                                                             \
3072   develop(intx, BciProfileWidth,      2,                                    \
3073           "Number of return bci's to record in ret profile")                \
3074                                                                             \
3075   product(intx, PerMethodRecompilationCutoff, 400,                          \
3076           "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3077                                                                             \
3078   product(intx, PerBytecodeRecompilationCutoff, 200,                        \
3079           "Per-BCI limit on repeated recompilation (-1=>'Inf')")            \
3080                                                                             \
3081   product(intx, PerMethodTrapLimit,  100,                                   \
3082           "Limit on traps (of one kind) in a method (includes inlines)")    \
3083                                                                             \
3084   experimental(intx, PerMethodSpecTrapLimit,  5000,                         \
3085           "Limit on speculative traps (of one kind) in a method (includes inlines)") \
3086                                                                             \
3087   product(intx, PerBytecodeTrapLimit,  4,                                   \
3088           "Limit on traps (of one kind) at a particular BCI")               \
3089                                                                             \
3090   experimental(intx, SpecTrapLimitExtraEntries,  3,                         \
3091           "Extra method data trap entries for speculation")                 \
3092                                                                             \
3093   develop(intx, InlineFrequencyRatio,    20,                                \
3094           "Ratio of call site execution to caller method invocation")       \
3095                                                                             \
3096   develop_pd(intx, InlineFrequencyCount,                                    \
3097           "Count of call site execution necessary to trigger frequent "     \
3098           "inlining")                                                       \
3099                                                                             \
3100   develop(intx, InlineThrowCount,    50,                                    \
3101           "Force inlining of interpreted methods that throw this often")    \
3102                                                                             \
3103   develop(intx, InlineThrowMaxSize,   200,                                  \
3104           "Force inlining of throwing methods smaller than this")           \
3105                                                                             \
3106   develop(intx, ProfilerNodeSize,  1024,                                    \
3107           "Size in K to allocate for the Profile Nodes of each thread")     \
3108                                                                             \
3109   product_pd(intx, PreInflateSpin,                                          \
3110           "Number of times to spin wait before inflation")                  \
3111                                                                             \
3112   /* gc parameters */                                                       \
3113   product(uintx, InitialHeapSize, 0,                                        \
3114           "Initial heap size (in bytes); zero means use ergonomics")        \
3115                                                                             \
3116   product(uintx, MaxHeapSize, ScaleForWordSize(96*M),                       \
3117           "Maximum heap size (in bytes)")                                   \
3118                                                                             \
3119   product(uintx, OldSize, ScaleForWordSize(4*M),                            \
3120           "Initial tenured generation size (in bytes)")                     \
3121                                                                             \
3122   product(uintx, NewSize, ScaleForWordSize(1*M),                            \
3123           "Initial new generation size (in bytes)")                         \
3124                                                                             \
3125   product(uintx, MaxNewSize, max_uintx,                                     \
3126           "Maximum new generation size (in bytes), max_uintx means set "    \
3127           "ergonomically")                                                  \
3128                                                                             \
3129   product(uintx, PretenureSizeThreshold, 0,                                 \
3130           "Maximum size in bytes of objects allocated in DefNew "           \
3131           "generation; zero means no maximum")                              \
3132                                                                             \
3133   product(uintx, TLABSize, 0,                                               \
3134           "Starting TLAB size (in bytes); zero means set ergonomically")    \
3135                                                                             \
3136   product(uintx, MinTLABSize, 2*K,                                          \
3137           "Minimum allowed TLAB size (in bytes)")                           \
3138                                                                             \
3139   product(uintx, TLABAllocationWeight, 35,                                  \
3140           "Allocation averaging weight")                                    \
3141                                                                             \
3142   product(uintx, TLABWasteTargetPercent, 1,                                 \
3143           "Percentage of Eden that can be wasted")                          \
3144                                                                             \
3145   product(uintx, TLABRefillWasteFraction,    64,                            \
3146           "Maximum TLAB waste at a refill (internal fragmentation)")        \
3147                                                                             \
3148   product(uintx, TLABWasteIncrement,    4,                                  \
3149           "Increment allowed waste at slow allocation")                     \
3150                                                                             \
3151   product(uintx, SurvivorRatio, 8,                                          \
3152           "Ratio of eden/survivor space size")                              \
3153                                                                             \
3154   product(uintx, NewRatio, 2,                                               \
3155           "Ratio of old/new generation sizes")                              \
3156                                                                             \
3157   product_pd(uintx, NewSizeThreadIncrease,                                  \
3158           "Additional size added to desired new generation size per "       \
3159           "non-daemon thread (in bytes)")                                   \
3160                                                                             \
3161   product_pd(uintx, MetaspaceSize,                                          \
3162           "Initial size of Metaspaces (in bytes)")                          \
3163                                                                             \
3164   product(uintx, MaxMetaspaceSize, max_uintx,                               \
3165           "Maximum size of Metaspaces (in bytes)")                          \
3166                                                                             \
3167   product(uintx, CompressedClassSpaceSize, 1*G,                             \
3168           "Maximum size of class area in Metaspace when compressed "        \
3169           "class pointers are used")                                        \
3170                                                                             \
3171   manageable(uintx, MinHeapFreeRatio, 40,                                   \
3172           "The minimum percentage of heap free after GC to avoid expansion."\
3173           " For most GCs this applies to the old generation. In G1 and"     \
3174           " ParallelGC it applies to the whole heap.")                      \
3175                                                                             \
3176   manageable(uintx, MaxHeapFreeRatio, 70,                                   \
3177           "The maximum percentage of heap free after GC to avoid shrinking."\
3178           " For most GCs this applies to the old generation. In G1 and"     \
3179           " ParallelGC it applies to the whole heap.")                      \
3180                                                                             \
3181   product(intx, SoftRefLRUPolicyMSPerMB, 1000,                              \
3182           "Number of milliseconds per MB of free space in the heap")        \
3183                                                                             \
3184   product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K),                \
3185           "The minimum change in heap space due to GC (in bytes)")          \
3186                                                                             \
3187   product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K),            \
3188           "The minimum expansion of Metaspace (in bytes)")                  \
3189                                                                             \
3190   product(uintx, MinMetaspaceFreeRatio,    40,                              \
3191           "The minimum percentage of Metaspace free after GC to avoid "     \
3192           "expansion")                                                      \
3193                                                                             \
3194   product(uintx, MaxMetaspaceFreeRatio,    70,                              \
3195           "The maximum percentage of Metaspace free after GC to avoid "     \
3196           "shrinking")                                                      \
3197                                                                             \
3198   product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M),              \
3199           "The maximum expansion of Metaspace without full GC (in bytes)")  \
3200                                                                             \
3201   product(uintx, QueuedAllocationWarningCount, 0,                           \
3202           "Number of times an allocation that queues behind a GC "          \
3203           "will retry before printing a warning")                           \
3204                                                                             \
3205   diagnostic(uintx, VerifyGCStartAt,   0,                                   \
3206           "GC invoke count where +VerifyBefore/AfterGC kicks in")           \
3207                                                                             \
3208   diagnostic(intx, VerifyGCLevel,     0,                                    \
3209           "Generation level at which to start +VerifyBefore/AfterGC")       \
3210                                                                             \
3211   product(uintx, MaxTenuringThreshold,    15,                               \
3212           "Maximum value for tenuring threshold")                           \
3213                                                                             \
3214   product(uintx, InitialTenuringThreshold,    7,                            \
3215           "Initial value for tenuring threshold")                           \
3216                                                                             \
3217   product(uintx, TargetSurvivorRatio,    50,                                \
3218           "Desired percentage of survivor space used after scavenge")       \
3219                                                                             \
3220   product(uintx, MarkSweepDeadRatio,     5,                                 \
3221           "Percentage (0-100) of the old gen allowed as dead wood. "        \
3222           "Serial mark sweep treats this as both the minimum and maximum "  \
3223           "value. "                                                         \
3224           "CMS uses this value only if it falls back to mark sweep. "       \
3225           "Par compact uses a variable scale based on the density of the "  \
3226           "generation and treats this as the maximum value when the heap "  \
3227           "is either completely full or completely empty.  Par compact "    \
3228           "also has a smaller default value; see arguments.cpp.")           \
3229                                                                             \
3230   product(uintx, MarkSweepAlwaysCompactCount,     4,                        \
3231           "How often should we fully compact the heap (ignoring the dead "  \
3232           "space parameters)")                                              \
3233                                                                             \
3234   product(intx, PrintCMSStatistics, 0,                                      \
3235           "Statistics for CMS")                                             \
3236                                                                             \
3237   product(bool, PrintCMSInitiationStatistics, false,                        \
3238           "Statistics for initiating a CMS collection")                     \
3239                                                                             \
3240   product(intx, PrintFLSStatistics, 0,                                      \
3241           "Statistics for CMS' FreeListSpace")                              \
3242                                                                             \
3243   product(intx, PrintFLSCensus, 0,                                          \
3244           "Census for CMS' FreeListSpace")                                  \
3245                                                                             \
3246   develop(uintx, GCExpandToAllocateDelayMillis, 0,                          \
3247           "Delay between expansion and allocation (in milliseconds)")       \
3248                                                                             \
3249   develop(uintx, GCWorkerDelayMillis, 0,                                    \
3250           "Delay in scheduling GC workers (in milliseconds)")               \
3251                                                                             \
3252   product(intx, DeferThrSuspendLoopCount,     4000,                         \
3253           "(Unstable) Number of times to iterate in safepoint loop "        \
3254           "before blocking VM threads ")                                    \
3255                                                                             \
3256   product(intx, DeferPollingPageLoopCount,     -1,                          \
3257           "(Unsafe,Unstable) Number of iterations in safepoint loop "       \
3258           "before changing safepoint polling page to RO ")                  \
3259                                                                             \
3260   product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)")               \
3261                                                                             \
3262   product(bool, PSChunkLargeArrays, true,                                   \
3263           "Process large arrays in chunks")                                 \
3264                                                                             \
3265   product(uintx, GCDrainStackTargetSize, 64,                                \
3266           "Number of entries we will try to leave on the stack "            \
3267           "during parallel gc")                                             \
3268                                                                             \
3269   /* stack parameters */                                                    \
3270   product_pd(intx, StackYellowPages,                                        \
3271           "Number of yellow zone (recoverable overflows) pages")            \
3272                                                                             \
3273   product_pd(intx, StackRedPages,                                           \
3274           "Number of red zone (unrecoverable overflows) pages")             \
3275                                                                             \
3276   product_pd(intx, StackShadowPages,                                        \
3277           "Number of shadow zone (for overflow checking) pages "            \
3278           "this should exceed the depth of the VM and native call stack")   \
3279                                                                             \
3280   product_pd(intx, ThreadStackSize,                                         \
3281           "Thread Stack Size (in Kbytes)")                                  \
3282                                                                             \
3283   product_pd(intx, VMThreadStackSize,                                       \
3284           "Non-Java Thread Stack Size (in Kbytes)")                         \
3285                                                                             \
3286   product_pd(intx, CompilerThreadStackSize,                                 \
3287           "Compiler Thread Stack Size (in Kbytes)")                         \
3288                                                                             \
3289   develop_pd(uintx, JVMInvokeMethodSlack,                                   \
3290           "Stack space (bytes) required for JVM_InvokeMethod to complete")  \
3291                                                                             \
3292   product(uintx, ThreadSafetyMargin, 50*M,                                  \
3293           "Thread safety margin is used on fixed-stack LinuxThreads (on "   \
3294           "Linux/x86 only) to prevent heap-stack collision. Set to 0 to "   \
3295           "disable this feature")                                           \
3296                                                                             \
3297   /* code cache parameters */                                               \
3298   /* ppc64/tiered compilation has large code-entry alignment. */            \
3299   develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)),\
3300           "Code cache segment size (in bytes) - smallest unit of "          \
3301           "allocation")                                                     \
3302                                                                             \
3303   develop_pd(intx, CodeEntryAlignment,                                      \
3304           "Code entry alignment for generated code (in bytes)")             \
3305                                                                             \
3306   product_pd(intx, OptoLoopAlignment,                                       \
3307           "Align inner loops to zero relative to this modulus")             \
3308                                                                             \
3309   product_pd(uintx, InitialCodeCacheSize,                                   \
3310           "Initial code cache size (in bytes)")                             \
3311                                                                             \
3312   develop_pd(uintx, CodeCacheMinimumUseSpace,                               \
3313           "Minimum code cache size (in bytes) required to start VM.")       \
3314                                                                             \
3315   product(bool, SegmentedCodeCache, false,                                  \
3316           "Use a segmented code cache")                                     \
3317                                                                             \
3318   product_pd(uintx, ReservedCodeCacheSize,                                  \
3319           "Reserved code cache size (in bytes) - maximum code cache size")  \
3320                                                                             \
3321   product_pd(uintx, NonProfiledCodeHeapSize,                                \
3322           "Size of code heap with non-profiled methods (in bytes)")         \
3323                                                                             \
3324   product_pd(uintx, ProfiledCodeHeapSize,                                   \
3325           "Size of code heap with profiled methods (in bytes)")             \
3326                                                                             \
3327   product_pd(uintx, NonNMethodCodeHeapSize,                                 \
3328           "Size of code heap with non-nmethods (in bytes)")                 \
3329                                                                             \
3330   product_pd(uintx, CodeCacheExpansionSize,                                 \
3331           "Code cache expansion size (in bytes)")                           \
3332                                                                             \
3333   develop_pd(uintx, CodeCacheMinBlockLength,                                \
3334           "Minimum number of segments in a code cache block")               \
3335                                                                             \
3336   notproduct(bool, ExitOnFullCodeCache, false,                              \
3337           "Exit the VM if we fill the code cache")                          \
3338                                                                             \
3339   product(bool, UseCodeCacheFlushing, true,                                 \
3340           "Remove cold/old nmethods from the code cache")                   \
3341                                                                             \
3342   product(uintx, StartAggressiveSweepingAt, 10,                             \
3343           "Start aggressive sweeping if X[%] of the code cache is free."    \
3344           "Segmented code cache: X[%] of the non-profiled heap."            \
3345           "Non-segmented code cache: X[%] of the total code cache")         \
3346                                                                             \
3347   /* interpreter debugging */                                               \
3348   develop(intx, BinarySwitchThreshold, 5,                                   \
3349           "Minimal number of lookupswitch entries for rewriting to binary " \
3350           "switch")                                                         \
3351                                                                             \
3352   develop(intx, StopInterpreterAt, 0,                                       \
3353           "Stop interpreter execution at specified bytecode number")        \
3354                                                                             \
3355   develop(intx, TraceBytecodesAt, 0,                                        \
3356           "Trace bytecodes starting with specified bytecode number")        \
3357                                                                             \
3358   /* compiler interface */                                                  \
3359   develop(intx, CIStart, 0,                                                 \
3360           "The id of the first compilation to permit")                      \
3361                                                                             \
3362   develop(intx, CIStop, max_jint,                                           \
3363           "The id of the last compilation to permit")                       \
3364                                                                             \
3365   develop(intx, CIStartOSR, 0,                                              \
3366           "The id of the first osr compilation to permit "                  \
3367           "(CICountOSR must be on)")                                        \
3368                                                                             \
3369   develop(intx, CIStopOSR, max_jint,                                        \
3370           "The id of the last osr compilation to permit "                   \
3371           "(CICountOSR must be on)")                                        \
3372                                                                             \
3373   develop(intx, CIBreakAtOSR, -1,                                           \
3374           "The id of osr compilation to break at")                          \
3375                                                                             \
3376   develop(intx, CIBreakAt, -1,                                              \
3377           "The id of compilation to break at")                              \
3378                                                                             \
3379   product(ccstrlist, CompileOnly, "",                                       \
3380           "List of methods (pkg/class.name) to restrict compilation to")    \
3381                                                                             \
3382   product(ccstr, CompileCommandFile, NULL,                                  \
3383           "Read compiler commands from this file [.hotspot_compiler]")      \
3384                                                                             \
3385   product(ccstrlist, CompileCommand, "",                                    \
3386           "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3387                                                                             \
3388   develop(bool, ReplayCompiles, false,                                      \
3389           "Enable replay of compilations from ReplayDataFile")              \
3390                                                                             \
3391   product(ccstr, ReplayDataFile, NULL,                                      \
3392           "File containing compilation replay information"                  \
3393           "[default: ./replay_pid%p.log] (%p replaced with pid)")           \
3394                                                                             \
3395    product(ccstr, InlineDataFile, NULL,                                     \
3396           "File containing inlining replay information"                     \
3397           "[default: ./inline_pid%p.log] (%p replaced with pid)")           \
3398                                                                             \
3399   develop(intx, ReplaySuppressInitializers, 2,                              \
3400           "Control handling of class initialization during replay: "        \
3401           "0 - don't do anything special; "                                 \
3402           "1 - treat all class initializers as empty; "                     \
3403           "2 - treat class initializers for application classes as empty; " \
3404           "3 - allow all class initializers to run during bootstrap but "   \
3405           "    pretend they are empty after starting replay")               \
3406                                                                             \
3407   develop(bool, ReplayIgnoreInitErrors, false,                              \
3408           "Ignore exceptions thrown during initialization for replay")      \
3409                                                                             \
3410   product(bool, DumpReplayDataOnError, true,                                \
3411           "Record replay data for crashing compiler threads")               \
3412                                                                             \
3413   product(bool, CICompilerCountPerCPU, false,                               \
3414           "1 compiler thread for log(N CPUs)")                              \
3415                                                                             \
3416   develop(intx, CIFireOOMAt,    -1,                                         \
3417           "Fire OutOfMemoryErrors throughout CI for testing the compiler "  \
3418           "(non-negative value throws OOM after this many CI accesses "     \
3419           "in each compile)")                                               \
3420   notproduct(intx, CICrashAt, -1,                                           \
3421           "id of compilation to trigger assert in compiler thread for "     \
3422           "the purpose of testing, e.g. generation of replay data")         \
3423   notproduct(bool, CIObjectFactoryVerify, false,                            \
3424           "enable potentially expensive verification in ciObjectFactory")   \
3425                                                                             \
3426   /* Priorities */                                                          \
3427   product_pd(bool, UseThreadPriorities,  "Use native thread priorities")    \
3428                                                                             \
3429   product(intx, ThreadPriorityPolicy, 0,                                    \
3430           "0 : Normal.                                                     "\
3431           "    VM chooses priorities that are appropriate for normal       "\
3432           "    applications. On Solaris NORM_PRIORITY and above are mapped "\
3433           "    to normal native priority. Java priorities below "           \
3434           "    NORM_PRIORITY map to lower native priority values. On       "\
3435           "    Windows applications are allowed to use higher native       "\
3436           "    priorities. However, with ThreadPriorityPolicy=0, VM will   "\
3437           "    not use the highest possible native priority,               "\
3438           "    THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with     "\
3439           "    system threads. On Linux thread priorities are ignored      "\
3440           "    because the OS does not support static priority in          "\
3441           "    SCHED_OTHER scheduling class which is the only choice for   "\
3442           "    non-root, non-realtime applications.                        "\
3443           "1 : Aggressive.                                                 "\
3444           "    Java thread priorities map over to the entire range of      "\
3445           "    native thread priorities. Higher Java thread priorities map "\
3446           "    to higher native thread priorities. This policy should be   "\
3447           "    used with care, as sometimes it can cause performance       "\
3448           "    degradation in the application and/or the entire system. On "\
3449           "    Linux this policy requires root privilege.")                 \
3450                                                                             \
3451   product(bool, ThreadPriorityVerbose, false,                               \
3452           "Print priority changes")                                         \
3453                                                                             \
3454   product(intx, DefaultThreadPriority, -1,                                  \
3455           "The native priority at which threads run if not elsewhere "      \
3456           "specified (-1 means no change)")                                 \
3457                                                                             \
3458   product(intx, CompilerThreadPriority, -1,                                 \
3459           "The native priority at which compiler threads should run "       \
3460           "(-1 means no change)")                                           \
3461                                                                             \
3462   product(intx, VMThreadPriority, -1,                                       \
3463           "The native priority at which the VM thread should run "          \
3464           "(-1 means no change)")                                           \
3465                                                                             \
3466   product(bool, CompilerThreadHintNoPreempt, true,                          \
3467           "(Solaris only) Give compiler threads an extra quanta")           \
3468                                                                             \
3469   product(bool, VMThreadHintNoPreempt, false,                               \
3470           "(Solaris only) Give VM thread an extra quanta")                  \
3471                                                                             \
3472   product(intx, JavaPriority1_To_OSPriority, -1,                            \
3473           "Map Java priorities to OS priorities")                           \
3474                                                                             \
3475   product(intx, JavaPriority2_To_OSPriority, -1,                            \
3476           "Map Java priorities to OS priorities")                           \
3477                                                                             \
3478   product(intx, JavaPriority3_To_OSPriority, -1,                            \
3479           "Map Java priorities to OS priorities")                           \
3480                                                                             \
3481   product(intx, JavaPriority4_To_OSPriority, -1,                            \
3482           "Map Java priorities to OS priorities")                           \
3483                                                                             \
3484   product(intx, JavaPriority5_To_OSPriority, -1,                            \
3485           "Map Java priorities to OS priorities")                           \
3486                                                                             \
3487   product(intx, JavaPriority6_To_OSPriority, -1,                            \
3488           "Map Java priorities to OS priorities")                           \
3489                                                                             \
3490   product(intx, JavaPriority7_To_OSPriority, -1,                            \
3491           "Map Java priorities to OS priorities")                           \
3492                                                                             \
3493   product(intx, JavaPriority8_To_OSPriority, -1,                            \
3494           "Map Java priorities to OS priorities")                           \
3495                                                                             \
3496   product(intx, JavaPriority9_To_OSPriority, -1,                            \
3497           "Map Java priorities to OS priorities")                           \
3498                                                                             \
3499   product(intx, JavaPriority10_To_OSPriority,-1,                            \
3500           "Map Java priorities to OS priorities")                           \
3501                                                                             \
3502   experimental(bool, UseCriticalJavaThreadPriority, false,                  \
3503           "Java thread priority 10 maps to critical scheduling priority")   \
3504                                                                             \
3505   experimental(bool, UseCriticalCompilerThreadPriority, false,              \
3506           "Compiler thread(s) run at critical scheduling priority")         \
3507                                                                             \
3508   experimental(bool, UseCriticalCMSThreadPriority, false,                   \
3509           "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3510                                                                             \
3511   /* compiler debugging */                                                  \
3512   notproduct(intx, CompileTheWorldStartAt,     1,                           \
3513           "First class to consider when using +CompileTheWorld")            \
3514                                                                             \
3515   notproduct(intx, CompileTheWorldStopAt, max_jint,                         \
3516           "Last class to consider when using +CompileTheWorld")             \
3517                                                                             \
3518   develop(intx, NewCodeParameter,      0,                                   \
3519           "Testing Only: Create a dedicated integer parameter before "      \
3520           "putback")                                                        \
3521                                                                             \
3522   /* new oopmap storage allocation */                                       \
3523   develop(intx, MinOopMapAllocation,     8,                                 \
3524           "Minimum number of OopMap entries in an OopMapSet")               \
3525                                                                             \
3526   /* Background Compilation */                                              \
3527   develop(intx, LongCompileThreshold,     50,                               \
3528           "Used with +TraceLongCompiles")                                   \
3529                                                                             \
3530   product(intx, StarvationMonitorInterval,    200,                          \
3531           "Pause between each check (in milliseconds)")                     \
3532                                                                             \
3533   /* recompilation */                                                       \
3534   product_pd(intx, CompileThreshold,                                        \
3535           "number of interpreted method invocations before (re-)compiling") \
3536                                                                             \
3537   product(double, CompileThresholdScaling, 1.0,                             \
3538           "Factor to control when first compilation happens "               \
3539           "(both with and without tiered compilation)")                     \
3540                                                                             \
3541   product(intx, Tier0InvokeNotifyFreqLog, 7,                                \
3542           "Interpreter (tier 0) invocation notification frequency")         \
3543                                                                             \
3544   product(intx, Tier2InvokeNotifyFreqLog, 11,                               \
3545           "C1 without MDO (tier 2) invocation notification frequency")      \
3546                                                                             \
3547   product(intx, Tier3InvokeNotifyFreqLog, 10,                               \
3548           "C1 with MDO profiling (tier 3) invocation notification "         \
3549           "frequency")                                                      \
3550                                                                             \
3551   product(intx, Tier23InlineeNotifyFreqLog, 20,                             \
3552           "Inlinee invocation (tiers 2 and 3) notification frequency")      \
3553                                                                             \
3554   product(intx, Tier0BackedgeNotifyFreqLog, 10,                             \
3555           "Interpreter (tier 0) invocation notification frequency")         \
3556                                                                             \
3557   product(intx, Tier2BackedgeNotifyFreqLog, 14,                             \
3558           "C1 without MDO (tier 2) invocation notification frequency")      \
3559                                                                             \
3560   product(intx, Tier3BackedgeNotifyFreqLog, 13,                             \
3561           "C1 with MDO profiling (tier 3) invocation notification "         \
3562           "frequency")                                                      \
3563                                                                             \
3564   product(intx, Tier2CompileThreshold, 0,                                   \
3565           "threshold at which tier 2 compilation is invoked")               \
3566                                                                             \
3567   product(intx, Tier2BackEdgeThreshold, 0,                                  \
3568           "Back edge threshold at which tier 2 compilation is invoked")     \
3569                                                                             \
3570   product(intx, Tier3InvocationThreshold, 200,                              \
3571           "Compile if number of method invocations crosses this "           \
3572           "threshold")                                                      \
3573                                                                             \
3574   product(intx, Tier3MinInvocationThreshold, 100,                           \
3575           "Minimum invocation to compile at tier 3")                        \
3576                                                                             \
3577   product(intx, Tier3CompileThreshold, 2000,                                \
3578           "Threshold at which tier 3 compilation is invoked (invocation "   \
3579           "minimum must be satisfied")                                      \
3580                                                                             \
3581   product(intx, Tier3BackEdgeThreshold,  60000,                             \
3582           "Back edge threshold at which tier 3 OSR compilation is invoked") \
3583                                                                             \
3584   product(intx, Tier4InvocationThreshold, 5000,                             \
3585           "Compile if number of method invocations crosses this "           \
3586           "threshold")                                                      \
3587                                                                             \
3588   product(intx, Tier4MinInvocationThreshold, 600,                           \
3589           "Minimum invocation to compile at tier 4")                        \
3590                                                                             \
3591   product(intx, Tier4CompileThreshold, 15000,                               \
3592           "Threshold at which tier 4 compilation is invoked (invocation "   \
3593           "minimum must be satisfied")                                      \
3594                                                                             \
3595   product(intx, Tier4BackEdgeThreshold, 40000,                              \
3596           "Back edge threshold at which tier 4 OSR compilation is invoked") \
3597                                                                             \
3598   product(intx, Tier3DelayOn, 5,                                            \
3599           "If C2 queue size grows over this amount per compiler thread "    \
3600           "stop compiling at tier 3 and start compiling at tier 2")         \
3601                                                                             \
3602   product(intx, Tier3DelayOff, 2,                                           \
3603           "If C2 queue size is less than this amount per compiler thread "  \
3604           "allow methods compiled at tier 2 transition to tier 3")          \
3605                                                                             \
3606   product(intx, Tier3LoadFeedback, 5,                                       \
3607           "Tier 3 thresholds will increase twofold when C1 queue size "     \
3608           "reaches this amount per compiler thread")                        \
3609                                                                             \
3610   product(intx, Tier4LoadFeedback, 3,                                       \
3611           "Tier 4 thresholds will increase twofold when C2 queue size "     \
3612           "reaches this amount per compiler thread")                        \
3613                                                                             \
3614   product(intx, TieredCompileTaskTimeout, 50,                               \
3615           "Kill compile task if method was not used within "                \
3616           "given timeout in milliseconds")                                  \
3617                                                                             \
3618   product(intx, TieredStopAtLevel, 4,                                       \
3619           "Stop at given compilation level")                                \
3620                                                                             \
3621   product(intx, Tier0ProfilingStartPercentage, 200,                         \
3622           "Start profiling in interpreter if the counters exceed tier 3 "   \
3623           "thresholds by the specified percentage")                         \
3624                                                                             \
3625   product(uintx, IncreaseFirstTierCompileThresholdAt, 50,                   \
3626           "Increase the compile threshold for C1 compilation if the code "  \
3627           "cache is filled by the specified percentage")                    \
3628                                                                             \
3629   product(intx, TieredRateUpdateMinTime, 1,                                 \
3630           "Minimum rate sampling interval (in milliseconds)")               \
3631                                                                             \
3632   product(intx, TieredRateUpdateMaxTime, 25,                                \
3633           "Maximum rate sampling interval (in milliseconds)")               \
3634                                                                             \
3635   product_pd(bool, TieredCompilation,                                       \
3636           "Enable tiered compilation")                                      \
3637                                                                             \
3638   product(bool, PrintTieredEvents, false,                                   \
3639           "Print tiered events notifications")                              \
3640                                                                             \
3641   product_pd(intx, OnStackReplacePercentage,                                \
3642           "NON_TIERED number of method invocations/branches (expressed as " \
3643           "% of CompileThreshold) before (re-)compiling OSR code")          \
3644                                                                             \
3645   product(intx, InterpreterProfilePercentage, 33,                           \
3646           "NON_TIERED number of method invocations/branches (expressed as " \
3647           "% of CompileThreshold) before profiling in the interpreter")     \
3648                                                                             \
3649   develop(intx, MaxRecompilationSearchLength,    10,                        \
3650           "The maximum number of frames to inspect when searching for "     \
3651           "recompilee")                                                     \
3652                                                                             \
3653   develop(intx, MaxInterpretedSearchLength,     3,                          \
3654           "The maximum number of interpreted frames to skip when searching "\
3655           "for recompilee")                                                 \
3656                                                                             \
3657   develop(intx, DesiredMethodLimit,  8000,                                  \
3658           "The desired maximum method size (in bytecodes) after inlining")  \
3659                                                                             \
3660   develop(intx, HugeMethodLimit,  8000,                                     \
3661           "Don't compile methods larger than this if "                      \
3662           "+DontCompileHugeMethods")                                        \
3663                                                                             \
3664   /* New JDK 1.4 reflection implementation */                               \
3665                                                                             \
3666   develop(intx, FastSuperclassLimit, 8,                                     \
3667           "Depth of hardwired instanceof accelerator array")                \
3668                                                                             \
3669   /* Properties for Java libraries  */                                      \
3670                                                                             \
3671   product(uintx, MaxDirectMemorySize, 0,                                    \
3672           "Maximum total size of NIO direct-buffer allocations")            \
3673                                                                             \
3674   /* Flags used for temporary code during development  */                   \
3675                                                                             \
3676   diagnostic(bool, UseNewCode, false,                                       \
3677           "Testing Only: Use the new version while testing")                \
3678                                                                             \
3679   diagnostic(bool, UseNewCode2, false,                                      \
3680           "Testing Only: Use the new version while testing")                \
3681                                                                             \
3682   diagnostic(bool, UseNewCode3, false,                                      \
3683           "Testing Only: Use the new version while testing")                \
3684                                                                             \
3685   /* flags for performance data collection */                               \
3686                                                                             \
3687   product(bool, UsePerfData, falseInEmbedded,                               \
3688           "Flag to disable jvmstat instrumentation for performance testing "\
3689           "and problem isolation purposes")                                 \
3690                                                                             \
3691   product(bool, PerfDataSaveToFile, false,                                  \
3692           "Save PerfData memory to hsperfdata_<pid> file on exit")          \
3693                                                                             \
3694   product(ccstr, PerfDataSaveFile, NULL,                                    \
3695           "Save PerfData memory to the specified absolute pathname. "       \
3696           "The string %p in the file name (if present) "                    \
3697           "will be replaced by pid")                                        \
3698                                                                             \
3699   product(intx, PerfDataSamplingInterval, 50,                               \
3700           "Data sampling interval (in milliseconds)")                       \
3701                                                                             \
3702   develop(bool, PerfTraceDataCreation, false,                               \
3703           "Trace creation of Performance Data Entries")                     \
3704                                                                             \
3705   develop(bool, PerfTraceMemOps, false,                                     \
3706           "Trace PerfMemory create/attach/detach calls")                    \
3707                                                                             \
3708   product(bool, PerfDisableSharedMem, false,                                \
3709           "Store performance data in standard memory")                      \
3710                                                                             \
3711   product(intx, PerfDataMemorySize, 32*K,                                   \
3712           "Size of performance data memory region. Will be rounded "        \
3713           "up to a multiple of the native os page size.")                   \
3714                                                                             \
3715   product(intx, PerfMaxStringConstLength, 1024,                             \
3716           "Maximum PerfStringConstant string length before truncation")     \
3717                                                                             \
3718   product(bool, PerfAllowAtExitRegistration, false,                         \
3719           "Allow registration of atexit() methods")                         \
3720                                                                             \
3721   product(bool, PerfBypassFileSystemCheck, false,                           \
3722           "Bypass Win32 file system criteria checks (Windows Only)")        \
3723                                                                             \
3724   product(intx, UnguardOnExecutionViolation, 0,                             \
3725           "Unguard page and retry on no-execute fault (Win32 only) "        \
3726           "0=off, 1=conservative, 2=aggressive")                            \
3727                                                                             \
3728   /* Serviceability Support */                                              \
3729                                                                             \
3730   product(bool, ManagementServer, false,                                    \
3731           "Create JMX Management Server")                                   \
3732                                                                             \
3733   product(bool, DisableAttachMechanism, false,                              \
3734           "Disable mechanism that allows tools to attach to this VM")       \
3735                                                                             \
3736   product(bool, StartAttachListener, false,                                 \
3737           "Always start Attach Listener at VM startup")                     \
3738                                                                             \
3739   manageable(bool, PrintConcurrentLocks, false,                             \
3740           "Print java.util.concurrent locks in thread dump")                \
3741                                                                             \
3742   product(bool, TransmitErrorReport, false,                                 \
3743           "Enable error report transmission on erroneous termination")      \
3744                                                                             \
3745   product(ccstr, ErrorReportServer, NULL,                                   \
3746           "Override built-in error report server address")                  \
3747                                                                             \
3748   /* Shared spaces */                                                       \
3749                                                                             \
3750   product(bool, UseSharedSpaces, true,                                      \
3751           "Use shared spaces for metadata")                                 \
3752                                                                             \
3753   product(bool, VerifySharedSpaces, false,                                  \
3754           "Verify shared spaces (false for default archive, true for "      \
3755           "archive specified by -XX:SharedArchiveFile)")                    \
3756                                                                             \
3757   product(bool, RequireSharedSpaces, false,                                 \
3758           "Require shared spaces for metadata")                             \
3759                                                                             \
3760   product(bool, DumpSharedSpaces, false,                                    \
3761           "Special mode: JVM reads a class list, loads classes, builds "    \
3762           "shared spaces, and dumps the shared spaces to a file to be "     \
3763           "used in future JVM runs")                                        \
3764                                                                             \
3765   product(bool, PrintSharedSpaces, false,                                   \
3766           "Print usage of shared spaces")                                   \
3767                                                                             \
3768   product(bool, PrintSharedArchiveAndExit, false,                           \
3769           "Print shared archive file contents")                             \
3770                                                                             \
3771   product(bool, PrintSharedDictionary, false,                               \
3772           "If PrintSharedArchiveAndExit is true, also print the shared "    \
3773           "dictionary")                                                     \
3774                                                                             \
3775   product(uintx, SharedReadWriteSize,  NOT_LP64(12*M) LP64_ONLY(16*M),      \
3776           "Size of read-write space for metadata (in bytes)")               \
3777                                                                             \
3778   product(uintx, SharedReadOnlySize,  NOT_LP64(12*M) LP64_ONLY(16*M),       \
3779           "Size of read-only space for metadata (in bytes)")                \
3780                                                                             \
3781   product(uintx, SharedMiscDataSize,    NOT_LP64(2*M) LP64_ONLY(4*M),       \
3782           "Size of the shared miscellaneous data area (in bytes)")          \
3783                                                                             \
3784   product(uintx, SharedMiscCodeSize,    120*K,                              \
3785           "Size of the shared miscellaneous code area (in bytes)")          \
3786                                                                             \
3787   product(uintx, SharedBaseAddress, LP64_ONLY(32*G)                         \
3788           NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)),                           \
3789           "Address to allocate shared memory region for class data")        \
3790                                                                             \
3791   diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false,              \
3792           "Do not quit -Xshare:dump even if we encounter unverifiable "     \
3793           "classes. Just exclude them from the shared dictionary.")         \
3794                                                                             \
3795   diagnostic(bool, PrintMethodHandleStubs, false,                           \
3796           "Print generated stub code for method handles")                   \
3797                                                                             \
3798   develop(bool, TraceMethodHandles, false,                                  \
3799           "trace internal method handle operations")                        \
3800                                                                             \
3801   diagnostic(bool, VerifyMethodHandles, trueInDebug,                        \
3802           "perform extra checks when constructing method handles")          \
3803                                                                             \
3804   diagnostic(bool, ShowHiddenFrames, false,                                 \
3805           "show method handle implementation frames (usually hidden)")      \
3806                                                                             \
3807   experimental(bool, TrustFinalNonStaticFields, false,                      \
3808           "trust final non-static declarations for constant folding")       \
3809                                                                             \
3810   diagnostic(bool, FoldStableValues, true,                                  \
3811           "Optimize loads from stable fields (marked w/ @Stable)")          \
3812                                                                             \
3813   develop(bool, TraceInvokeDynamic, false,                                  \
3814           "trace internal invoke dynamic operations")                       \
3815                                                                             \
3816   diagnostic(bool, PauseAtStartup,      false,                              \
3817           "Causes the VM to pause at startup time and wait for the pause "  \
3818           "file to be removed (default: ./vm.paused.<pid>)")                \
3819                                                                             \
3820   diagnostic(ccstr, PauseAtStartupFile, NULL,                               \
3821           "The file to create and for whose removal to await when pausing " \
3822           "at startup. (default: ./vm.paused.<pid>)")                       \
3823                                                                             \
3824   diagnostic(bool, PauseAtExit, false,                                      \
3825           "Pause and wait for keypress on exit if a debugger is attached")  \
3826                                                                             \
3827   product(bool, ExtendedDTraceProbes,    false,                             \
3828           "Enable performance-impacting dtrace probes")                     \
3829                                                                             \
3830   product(bool, DTraceMethodProbes, false,                                  \
3831           "Enable dtrace probes for method-entry and method-exit")          \
3832                                                                             \
3833   product(bool, DTraceAllocProbes, false,                                   \
3834           "Enable dtrace probes for object allocation")                     \
3835                                                                             \
3836   product(bool, DTraceMonitorProbes, false,                                 \
3837           "Enable dtrace probes for monitor events")                        \
3838                                                                             \
3839   product(bool, RelaxAccessControlCheck, false,                             \
3840           "Relax the access control checks in the verifier")                \
3841                                                                             \
3842   diagnostic(bool, PrintDTraceDOF, false,                                   \
3843           "Print the DTrace DOF passed to the system for JSDT probes")      \
3844                                                                             \
3845   product(uintx, StringTableSize, defaultStringTableSize,                   \
3846           "Number of buckets in the interned String table")                 \
3847                                                                             \
3848   experimental(uintx, SymbolTableSize, defaultSymbolTableSize,              \
3849           "Number of buckets in the JVM internal Symbol table")             \
3850                                                                             \
3851   product(bool, UseStringDeduplication, false,                              \
3852           "Use string deduplication")                                       \
3853                                                                             \
3854   product(bool, PrintStringDeduplicationStatistics, false,                  \
3855           "Print string deduplication statistics")                          \
3856                                                                             \
3857   product(uintx, StringDeduplicationAgeThreshold, 3,                        \
3858           "A string must reach this age (or be promoted to an old region) " \
3859           "to be considered for deduplication")                             \
3860                                                                             \
3861   diagnostic(bool, StringDeduplicationResizeALot, false,                    \
3862           "Force table resize every time the table is scanned")             \
3863                                                                             \
3864   diagnostic(bool, StringDeduplicationRehashALot, false,                    \
3865           "Force table rehash every time the table is scanned")             \
3866                                                                             \
3867   develop(bool, TraceDefaultMethods, false,                                 \
3868           "Trace the default method processing steps")                      \
3869                                                                             \
3870   develop(bool, VerifyGenericSignatures, false,                             \
3871           "Abort VM on erroneous or inconsistent generic signatures")       \
3872                                                                             \
3873   diagnostic(bool, WhiteBoxAPI, false,                                      \
3874           "Enable internal testing APIs")                                   \
3875                                                                             \
3876   product(bool, PrintGCCause, true,                                         \
3877           "Include GC cause in GC logging")                                 \
3878                                                                             \
3879   experimental(intx, SurvivorAlignmentInBytes, 0,                           \
3880            "Default survivor space alignment in bytes")                     \
3881                                                                             \
3882   product(bool , AllowNonVirtualCalls, false,                               \
3883           "Obey the ACC_SUPER flag and allow invokenonvirtual calls")       \
3884                                                                             \
3885   product(ccstr, DumpLoadedClassList, NULL,                                 \
3886           "Dump the names all loaded classes, that could be stored into "   \
3887           "the CDS archive, in the specified file")                         \
3888                                                                             \
3889   product(ccstr, SharedClassListFile, NULL,                                 \
3890           "Override the default CDS class list")                            \
3891                                                                             \
3892   diagnostic(ccstr, SharedArchiveFile, NULL,                                \
3893           "Override the default location of the CDS archive file")          \
3894                                                                             \
3895   product(ccstr, ExtraSharedClassListFile, NULL,                            \
3896           "Extra classlist for building the CDS archive file")              \
3897                                                                             \
3898   experimental(size_t, ArrayAllocatorMallocLimit,                           \
3899           SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1),                       \
3900           "Allocation less than this value will be allocated "              \
3901           "using malloc. Larger allocations will use mmap.")                \
3902                                                                             \
3903   experimental(bool, AlwaysAtomicAccesses, false,                           \
3904           "Accesses to all variables should always be atomic")              \
3905                                                                             \
3906   product(bool, EnableTracing, false,                                       \
3907           "Enable event-based tracing")                                     \
3908                                                                             \
3909   product(bool, UseLockedTracing, false,                                    \
3910           "Use locked-tracing when doing event-based tracing")
3911 
3912 /*
3913  *  Macros for factoring of globals
3914  */
3915 
3916 // Interface macros
3917 #define DECLARE_PRODUCT_FLAG(type, name, value, doc)      extern "C" type name;
3918 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc)          extern "C" type name;
3919 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc)   extern "C" type name;
3920 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3921 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc)   extern "C" type name;
3922 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc)   extern "C" type name;
3923 #ifdef PRODUCT
3924 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type CONST_##name; const type name = value;
3925 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type CONST_##name; const type name = pd_##name;
3926 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type CONST_##name;
3927 #else
3928 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type name;
3929 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type name;
3930 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type name;
3931 #endif
3932 // Special LP64 flags, product only needed for now.
3933 #ifdef _LP64
3934 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3935 #else
3936 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3937 #endif // _LP64
3938 
3939 // Implementation macros
3940 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc)      type name = value;
3941 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc)          type name = pd_##name;
3942 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc)   type name = value;
3943 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3944 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc)   type name = value;
3945 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc)   type name = value;
3946 #ifdef PRODUCT
3947 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type CONST_##name = value;
3948 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type CONST_##name = pd_##name;
3949 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type CONST_##name = value;
3950 #else
3951 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type name = value;
3952 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type name = pd_##name;
3953 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type name = value;
3954 #endif
3955 #ifdef _LP64
3956 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3957 #else
3958 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3959 #endif // _LP64
3960 
3961 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)
3962 
3963 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3964 
3965 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
3966 
3967 // Extensions
3968 
3969 #include "runtime/globals_ext.hpp"
3970 
3971 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP