1 /*
   2  * Copyright (c) 1997, 2015, 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   product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17),                        \
 535           "Heap allocation steps through preferred address regions to find" \
 536           " where it can allocate the heap. Number of steps to take per "   \
 537           "region.")                                                        \
 538                                                                             \
 539   diagnostic(bool, PrintCompressedOopsMode, false,                          \
 540           "Print compressed oops base address and encoding mode")           \
 541                                                                             \
 542   lp64_product(intx, ObjectAlignmentInBytes, 8,                             \
 543           "Default object alignment in bytes, 8 is minimum")                \
 544                                                                             \
 545   product(bool, AssumeMP, false,                                            \
 546           "Instruct the VM to assume multiple processors are available")    \
 547                                                                             \
 548   /* UseMembar is theoretically a temp flag used for memory barrier         \
 549    * removal testing.  It was supposed to be removed before FCS but has     \
 550    * been re-added (see 6401008) */                                         \
 551   product_pd(bool, UseMembar,                                               \
 552           "(Unstable) Issues membars on thread state transitions")          \
 553                                                                             \
 554   develop(bool, CleanChunkPoolAsync, falseInEmbedded,                       \
 555           "Clean the chunk pool asynchronously")                            \
 556                                                                             \
 557   experimental(bool, AlwaysSafeConstructors, false,                         \
 558           "Force safe construction, as if all fields are final.")           \
 559                                                                             \
 560   /* Temporary: See 6948537 */                                              \
 561   experimental(bool, UseMemSetInBOT, true,                                  \
 562           "(Unstable) uses memset in BOT updates in GC code")               \
 563                                                                             \
 564   diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug,                  \
 565           "Enable normal processing of flags relating to field diagnostics")\
 566                                                                             \
 567   experimental(bool, UnlockExperimentalVMOptions, false,                    \
 568           "Enable normal processing of flags relating to experimental "     \
 569           "features")                                                       \
 570                                                                             \
 571   product(bool, JavaMonitorsInStackTrace, true,                             \
 572           "Print information about Java monitor locks when the stacks are"  \
 573           "dumped")                                                         \
 574                                                                             \
 575   product_pd(bool, UseLargePages,                                           \
 576           "Use large page memory")                                          \
 577                                                                             \
 578   product_pd(bool, UseLargePagesIndividualAllocation,                       \
 579           "Allocate large pages individually for better affinity")          \
 580                                                                             \
 581   develop(bool, LargePagesIndividualAllocationInjectError, false,           \
 582           "Fail large pages individual allocation")                         \
 583                                                                             \
 584   product(bool, UseLargePagesInMetaspace, false,                            \
 585           "Use large page memory in metaspace. "                            \
 586           "Only used if UseLargePages is enabled.")                         \
 587                                                                             \
 588   develop(bool, TracePageSizes, false,                                      \
 589           "Trace page size selection and usage")                            \
 590                                                                             \
 591   product(bool, UseNUMA, false,                                             \
 592           "Use NUMA if available")                                          \
 593                                                                             \
 594   product(bool, UseNUMAInterleaving, false,                                 \
 595           "Interleave memory across NUMA nodes if available")               \
 596                                                                             \
 597   product(uintx, NUMAInterleaveGranularity, 2*M,                            \
 598           "Granularity to use for NUMA interleaving on Windows OS")         \
 599                                                                             \
 600   product(bool, ForceNUMA, false,                                           \
 601           "Force NUMA optimizations on single-node/UMA systems")            \
 602                                                                             \
 603   product(uintx, NUMAChunkResizeWeight, 20,                                 \
 604           "Percentage (0-100) used to weight the current sample when "      \
 605           "computing exponentially decaying average for "                   \
 606           "AdaptiveNUMAChunkSizing")                                        \
 607                                                                             \
 608   product(uintx, NUMASpaceResizeRate, 1*G,                                  \
 609           "Do not reallocate more than this amount per collection")         \
 610                                                                             \
 611   product(bool, UseAdaptiveNUMAChunkSizing, true,                           \
 612           "Enable adaptive chunk sizing for NUMA")                          \
 613                                                                             \
 614   product(bool, NUMAStats, false,                                           \
 615           "Print NUMA stats in detailed heap information")                  \
 616                                                                             \
 617   product(uintx, NUMAPageScanRate, 256,                                     \
 618           "Maximum number of pages to include in the page scan procedure")  \
 619                                                                             \
 620   product_pd(bool, NeedsDeoptSuspend,                                       \
 621           "True for register window machines (sparc/ia64)")                 \
 622                                                                             \
 623   product(intx, UseSSE, 99,                                                 \
 624           "Highest supported SSE instructions set on x86/x64")              \
 625                                                                             \
 626   product(bool, UseAES, false,                                              \
 627           "Control whether AES instructions can be used on x86/x64")        \
 628                                                                             \
 629   product(bool, UseSHA, false,                                              \
 630           "Control whether SHA instructions can be used on SPARC")          \
 631                                                                             \
 632   product(uintx, LargePageSizeInBytes, 0,                                   \
 633           "Large page size (0 to let VM choose the page size)")             \
 634                                                                             \
 635   product(uintx, LargePageHeapSizeThreshold, 128*M,                         \
 636           "Use large pages if maximum heap is at least this big")           \
 637                                                                             \
 638   product(bool, ForceTimeHighResolution, false,                             \
 639           "Using high time resolution (for Win32 only)")                    \
 640                                                                             \
 641   develop(bool, TraceItables, false,                                        \
 642           "Trace initialization and use of itables")                        \
 643                                                                             \
 644   develop(bool, TracePcPatching, false,                                     \
 645           "Trace usage of frame::patch_pc")                                 \
 646                                                                             \
 647   develop(bool, TraceJumps, false,                                          \
 648           "Trace assembly jumps in thread ring buffer")                     \
 649                                                                             \
 650   develop(bool, TraceRelocator, false,                                      \
 651           "Trace the bytecode relocator")                                   \
 652                                                                             \
 653   develop(bool, TraceLongCompiles, false,                                   \
 654           "Print out every time compilation is longer than "                \
 655           "a given threshold")                                              \
 656                                                                             \
 657   develop(bool, SafepointALot, false,                                       \
 658           "Generate a lot of safepoints. This works with "                  \
 659           "GuaranteedSafepointInterval")                                    \
 660                                                                             \
 661   product_pd(bool, BackgroundCompilation,                                   \
 662           "A thread requesting compilation is not blocked during "          \
 663           "compilation")                                                    \
 664                                                                             \
 665   product(bool, PrintVMQWaitTime, false,                                    \
 666           "Print out the waiting time in VM operation queue")               \
 667                                                                             \
 668   develop(bool, NoYieldsInMicrolock, false,                                 \
 669           "Disable yields in microlock")                                    \
 670                                                                             \
 671   develop(bool, TraceOopMapGeneration, false,                               \
 672           "Show OopMapGeneration")                                          \
 673                                                                             \
 674   product(bool, MethodFlushing, true,                                       \
 675           "Reclamation of zombie and not-entrant methods")                  \
 676                                                                             \
 677   develop(bool, VerifyStack, false,                                         \
 678           "Verify stack of each thread when it is entering a runtime call") \
 679                                                                             \
 680   diagnostic(bool, ForceUnreachable, false,                                 \
 681           "Make all non code cache addresses to be unreachable by "         \
 682           "forcing use of 64bit literal fixups")                            \
 683                                                                             \
 684   notproduct(bool, StressDerivedPointers, false,                            \
 685           "Force scavenge when a derived pointer is detected on stack "     \
 686           "after rtm call")                                                 \
 687                                                                             \
 688   develop(bool, TraceDerivedPointers, false,                                \
 689           "Trace traversal of derived pointers on stack")                   \
 690                                                                             \
 691   notproduct(bool, TraceCodeBlobStacks, false,                              \
 692           "Trace stack-walk of codeblobs")                                  \
 693                                                                             \
 694   product(bool, PrintJNIResolving, false,                                   \
 695           "Used to implement -v:jni")                                       \
 696                                                                             \
 697   notproduct(bool, PrintRewrites, false,                                    \
 698           "Print methods that are being rewritten")                         \
 699                                                                             \
 700   product(bool, UseInlineCaches, true,                                      \
 701           "Use Inline Caches for virtual calls ")                           \
 702                                                                             \
 703   develop(bool, InlineArrayCopy, true,                                      \
 704           "Inline arraycopy native that is known to be part of "            \
 705           "base library DLL")                                               \
 706                                                                             \
 707   develop(bool, InlineObjectHash, true,                                     \
 708           "Inline Object::hashCode() native that is known to be part "      \
 709           "of base library DLL")                                            \
 710                                                                             \
 711   develop(bool, InlineNatives, true,                                        \
 712           "Inline natives that are known to be part of base library DLL")   \
 713                                                                             \
 714   develop(bool, InlineMathNatives, true,                                    \
 715           "Inline SinD, CosD, etc.")                                        \
 716                                                                             \
 717   develop(bool, InlineClassNatives, true,                                   \
 718           "Inline Class.isInstance, etc")                                   \
 719                                                                             \
 720   develop(bool, InlineThreadNatives, true,                                  \
 721           "Inline Thread.currentThread, etc")                               \
 722                                                                             \
 723   develop(bool, InlineUnsafeOps, true,                                      \
 724           "Inline memory ops (native methods) from sun.misc.Unsafe")        \
 725                                                                             \
 726   product(bool, CriticalJNINatives, true,                                   \
 727           "Check for critical JNI entry points")                            \
 728                                                                             \
 729   notproduct(bool, StressCriticalJNINatives, false,                         \
 730           "Exercise register saving code in critical natives")              \
 731                                                                             \
 732   product(bool, UseSSE42Intrinsics, false,                                  \
 733           "SSE4.2 versions of intrinsics")                                  \
 734                                                                             \
 735   product(bool, UseAESIntrinsics, false,                                    \
 736           "Use intrinsics for AES versions of crypto")                      \
 737                                                                             \
 738   product(bool, UseSHA1Intrinsics, false,                                   \
 739           "Use intrinsics for SHA-1 crypto hash function")                  \
 740                                                                             \
 741   product(bool, UseSHA256Intrinsics, false,                                 \
 742           "Use intrinsics for SHA-224 and SHA-256 crypto hash functions")   \
 743                                                                             \
 744   product(bool, UseSHA512Intrinsics, false,                                 \
 745           "Use intrinsics for SHA-384 and SHA-512 crypto hash functions")   \
 746                                                                             \
 747   product(bool, UseCRC32Intrinsics, false,                                  \
 748           "use intrinsics for java.util.zip.CRC32")                         \
 749                                                                             \
 750   develop(bool, TraceCallFixup, false,                                      \
 751           "Trace all call fixups")                                          \
 752                                                                             \
 753   develop(bool, DeoptimizeALot, false,                                      \
 754           "Deoptimize at every exit from the runtime system")               \
 755                                                                             \
 756   notproduct(ccstrlist, DeoptimizeOnlyAt, "",                               \
 757           "A comma separated list of bcis to deoptimize at")                \
 758                                                                             \
 759   product(bool, DeoptimizeRandom, false,                                    \
 760           "Deoptimize random frames on random exit from the runtime system")\
 761                                                                             \
 762   notproduct(bool, ZombieALot, false,                                       \
 763           "Create zombies (non-entrant) at exit from the runtime system")   \
 764                                                                             \
 765   product(bool, UnlinkSymbolsALot, false,                                   \
 766           "Unlink unreferenced symbols from the symbol table at safepoints")\
 767                                                                             \
 768   notproduct(bool, WalkStackALot, false,                                    \
 769           "Trace stack (no print) at every exit from the runtime system")   \
 770                                                                             \
 771   product(bool, Debugging, false,                                           \
 772           "Set when executing debug methods in debug.cpp "                  \
 773           "(to prevent triggering assertions)")                             \
 774                                                                             \
 775   notproduct(bool, StrictSafepointChecks, trueInDebug,                      \
 776           "Enable strict checks that safepoints cannot happen for threads " \
 777           "that use No_Safepoint_Verifier")                                 \
 778                                                                             \
 779   notproduct(bool, VerifyLastFrame, false,                                  \
 780           "Verify oops on last frame on entry to VM")                       \
 781                                                                             \
 782   develop(bool, TraceHandleAllocation, false,                               \
 783           "Print out warnings when suspiciously many handles are allocated")\
 784                                                                             \
 785   product(bool, FailOverToOldVerifier, true,                                \
 786           "Fail over to old verifier when split verifier fails")            \
 787                                                                             \
 788   develop(bool, ShowSafepointMsgs, false,                                   \
 789           "Show message about safepoint synchronization")                   \
 790                                                                             \
 791   product(bool, SafepointTimeout, false,                                    \
 792           "Time out and warn or fail after SafepointTimeoutDelay "          \
 793           "milliseconds if failed to reach safepoint")                      \
 794                                                                             \
 795   develop(bool, DieOnSafepointTimeout, false,                               \
 796           "Die upon failure to reach safepoint (see SafepointTimeout)")     \
 797                                                                             \
 798   /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */      \
 799   /* typically, at most a few retries are needed */                         \
 800   product(intx, SuspendRetryCount, 50,                                      \
 801           "Maximum retry count for an external suspend request")            \
 802                                                                             \
 803   product(intx, SuspendRetryDelay, 5,                                       \
 804           "Milliseconds to delay per retry (* current_retry_count)")        \
 805                                                                             \
 806   product(bool, AssertOnSuspendWaitFailure, false,                          \
 807           "Assert/Guarantee on external suspend wait failure")              \
 808                                                                             \
 809   product(bool, TraceSuspendWaitFailures, false,                            \
 810           "Trace external suspend wait failures")                           \
 811                                                                             \
 812   product(bool, MaxFDLimit, true,                                           \
 813           "Bump the number of file descriptors to maximum in Solaris")      \
 814                                                                             \
 815   diagnostic(bool, LogEvents, true,                                         \
 816           "Enable the various ring buffer event logs")                      \
 817                                                                             \
 818   diagnostic(uintx, LogEventsBufferEntries, 10,                             \
 819           "Number of ring buffer event logs")                               \
 820                                                                             \
 821   product(bool, BytecodeVerificationRemote, true,                           \
 822           "Enable the Java bytecode verifier for remote classes")           \
 823                                                                             \
 824   product(bool, BytecodeVerificationLocal, false,                           \
 825           "Enable the Java bytecode verifier for local classes")            \
 826                                                                             \
 827   develop(bool, ForceFloatExceptions, trueInDebug,                          \
 828           "Force exceptions on FP stack under/overflow")                    \
 829                                                                             \
 830   develop(bool, VerifyStackAtCalls, false,                                  \
 831           "Verify that the stack pointer is unchanged after calls")         \
 832                                                                             \
 833   develop(bool, TraceJavaAssertions, false,                                 \
 834           "Trace java language assertions")                                 \
 835                                                                             \
 836   notproduct(bool, CheckAssertionStatusDirectives, false,                   \
 837           "Temporary - see javaClasses.cpp")                                \
 838                                                                             \
 839   notproduct(bool, PrintMallocFree, false,                                  \
 840           "Trace calls to C heap malloc/free allocation")                   \
 841                                                                             \
 842   product(bool, PrintOopAddress, false,                                     \
 843           "Always print the location of the oop")                           \
 844                                                                             \
 845   notproduct(bool, VerifyCodeCache, false,                                  \
 846           "Verify code cache on memory allocation/deallocation")            \
 847                                                                             \
 848   develop(bool, ZapDeadCompiledLocals, false,                               \
 849           "Zap dead locals in compiler frames")                             \
 850                                                                             \
 851   notproduct(bool, ZapDeadLocalsOld, false,                                 \
 852           "Zap dead locals (old version, zaps all frames when "             \
 853           "entering the VM")                                                \
 854                                                                             \
 855   notproduct(bool, CheckOopishValues, false,                                \
 856           "Warn if value contains oop (requires ZapDeadLocals)")            \
 857                                                                             \
 858   develop(bool, UseMallocOnly, false,                                       \
 859           "Use only malloc/free for allocation (no resource area/arena)")   \
 860                                                                             \
 861   develop(bool, PrintMalloc, false,                                         \
 862           "Print all malloc/free calls")                                    \
 863                                                                             \
 864   develop(bool, PrintMallocStatistics, false,                               \
 865           "Print malloc/free statistics")                                   \
 866                                                                             \
 867   develop(bool, ZapResourceArea, trueInDebug,                               \
 868           "Zap freed resource/arena space with 0xABABABAB")                 \
 869                                                                             \
 870   notproduct(bool, ZapVMHandleArea, trueInDebug,                            \
 871           "Zap freed VM handle space with 0xBCBCBCBC")                      \
 872                                                                             \
 873   develop(bool, ZapJNIHandleArea, trueInDebug,                              \
 874           "Zap freed JNI handle space with 0xFEFEFEFE")                     \
 875                                                                             \
 876   notproduct(bool, ZapStackSegments, trueInDebug,                           \
 877           "Zap allocated/freed stack segments with 0xFADFADED")             \
 878                                                                             \
 879   develop(bool, ZapUnusedHeapArea, trueInDebug,                             \
 880           "Zap unused heap space with 0xBAADBABE")                          \
 881                                                                             \
 882   develop(bool, TraceZapUnusedHeapArea, false,                              \
 883           "Trace zapping of unused heap space")                             \
 884                                                                             \
 885   develop(bool, CheckZapUnusedHeapArea, false,                              \
 886           "Check zapping of unused heap space")                             \
 887                                                                             \
 888   develop(bool, ZapFillerObjects, trueInDebug,                              \
 889           "Zap filler objects with 0xDEAFBABE")                             \
 890                                                                             \
 891   develop(bool, PrintVMMessages, true,                                      \
 892           "Print VM messages on console")                                   \
 893                                                                             \
 894   product(bool, PrintGCApplicationConcurrentTime, false,                    \
 895           "Print the time the application has been running")                \
 896                                                                             \
 897   product(bool, PrintGCApplicationStoppedTime, false,                       \
 898           "Print the time the application has been stopped")                \
 899                                                                             \
 900   diagnostic(bool, VerboseVerification, false,                              \
 901           "Display detailed verification details")                          \
 902                                                                             \
 903   notproduct(uintx, ErrorHandlerTest, 0,                                    \
 904           "If > 0, provokes an error after VM initialization; the value "   \
 905           "determines which error to provoke. See test_error_handler() "    \
 906           "in debug.cpp.")                                                  \
 907                                                                             \
 908   develop(bool, Verbose, false,                                             \
 909           "Print additional debugging information from other modes")        \
 910                                                                             \
 911   develop(bool, PrintMiscellaneous, false,                                  \
 912           "Print uncategorized debugging information (requires +Verbose)")  \
 913                                                                             \
 914   develop(bool, WizardMode, false,                                          \
 915           "Print much more debugging information")                          \
 916                                                                             \
 917   product(bool, ShowMessageBoxOnError, false,                               \
 918           "Keep process alive on VM fatal error")                           \
 919                                                                             \
 920   product(bool, CreateMinidumpOnCrash, false,                               \
 921           "Create minidump on VM fatal error")                              \
 922                                                                             \
 923   product_pd(bool, UseOSErrorReporting,                                     \
 924           "Let VM fatal error propagate to the OS (ie. WER on Windows)")    \
 925                                                                             \
 926   product(bool, SuppressFatalErrorMessage, false,                           \
 927           "Report NO fatal error message (avoid deadlock)")                 \
 928                                                                             \
 929   product(ccstrlist, OnError, "",                                           \
 930           "Run user-defined commands on fatal error; see VMError.cpp "      \
 931           "for examples")                                                   \
 932                                                                             \
 933   product(ccstrlist, OnOutOfMemoryError, "",                                \
 934           "Run user-defined commands on first java.lang.OutOfMemoryError")  \
 935                                                                             \
 936   manageable(bool, HeapDumpBeforeFullGC, false,                             \
 937           "Dump heap to file before any major stop-the-world GC")           \
 938                                                                             \
 939   manageable(bool, HeapDumpAfterFullGC, false,                              \
 940           "Dump heap to file after any major stop-the-world GC")            \
 941                                                                             \
 942   manageable(bool, HeapDumpOnOutOfMemoryError, false,                       \
 943           "Dump heap to file when java.lang.OutOfMemoryError is thrown")    \
 944                                                                             \
 945   manageable(ccstr, HeapDumpPath, NULL,                                     \
 946           "When HeapDumpOnOutOfMemoryError is on, the path (filename or "   \
 947           "directory) of the dump file (defaults to java_pid<pid>.hprof "   \
 948           "in the working directory)")                                      \
 949                                                                             \
 950   develop(uintx, SegmentedHeapDumpThreshold, 2*G,                           \
 951           "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) "     \
 952           "when the heap usage is larger than this")                        \
 953                                                                             \
 954   develop(uintx, HeapDumpSegmentSize, 1*G,                                  \
 955           "Approximate segment size when generating a segmented heap dump") \
 956                                                                             \
 957   develop(bool, BreakAtWarning, false,                                      \
 958           "Execute breakpoint upon encountering VM warning")                \
 959                                                                             \
 960   develop(bool, TraceVMOperation, false,                                    \
 961           "Trace VM operations")                                            \
 962                                                                             \
 963   develop(bool, UseFakeTimers, false,                                       \
 964           "Tell whether the VM should use system time or a fake timer")     \
 965                                                                             \
 966   product(ccstr, NativeMemoryTracking, "off",                               \
 967           "Native memory tracking options")                                 \
 968                                                                             \
 969   diagnostic(bool, PrintNMTStatistics, false,                               \
 970           "Print native memory tracking summary data if it is on")          \
 971                                                                             \
 972   diagnostic(bool, LogCompilation, false,                                   \
 973           "Log compilation activity in detail to LogFile")                  \
 974                                                                             \
 975   product(bool, PrintCompilation, false,                                    \
 976           "Print compilations")                                             \
 977                                                                             \
 978   diagnostic(bool, TraceNMethodInstalls, false,                             \
 979           "Trace nmethod installation")                                     \
 980                                                                             \
 981   diagnostic(intx, ScavengeRootsInCode, 2,                                  \
 982           "0: do not allow scavengable oops in the code cache; "            \
 983           "1: allow scavenging from the code cache; "                       \
 984           "2: emit as many constants as the compiler can see")              \
 985                                                                             \
 986   product(bool, AlwaysRestoreFPU, false,                                    \
 987           "Restore the FPU control word after every JNI call (expensive)")  \
 988                                                                             \
 989   diagnostic(bool, PrintCompilation2, false,                                \
 990           "Print additional statistics per compilation")                    \
 991                                                                             \
 992   diagnostic(bool, PrintAdapterHandlers, false,                             \
 993           "Print code generated for i2c/c2i adapters")                      \
 994                                                                             \
 995   diagnostic(bool, VerifyAdapterCalls, trueInDebug,                         \
 996           "Verify that i2c/c2i adapters are called properly")               \
 997                                                                             \
 998   develop(bool, VerifyAdapterSharing, false,                                \
 999           "Verify that the code for shared adapters is the equivalent")     \
1000                                                                             \
1001   diagnostic(bool, PrintAssembly, false,                                    \
1002           "Print assembly code (using external disassembler.so)")           \
1003                                                                             \
1004   diagnostic(ccstr, PrintAssemblyOptions, NULL,                             \
1005           "Print options string passed to disassembler.so")                 \
1006                                                                             \
1007   diagnostic(bool, PrintNMethods, false,                                    \
1008           "Print assembly code for nmethods when generated")                \
1009                                                                             \
1010   diagnostic(bool, PrintNativeNMethods, false,                              \
1011           "Print assembly code for native nmethods when generated")         \
1012                                                                             \
1013   develop(bool, PrintDebugInfo, false,                                      \
1014           "Print debug information for all nmethods when generated")        \
1015                                                                             \
1016   develop(bool, PrintRelocations, false,                                    \
1017           "Print relocation information for all nmethods when generated")   \
1018                                                                             \
1019   develop(bool, PrintDependencies, false,                                   \
1020           "Print dependency information for all nmethods when generated")   \
1021                                                                             \
1022   develop(bool, PrintExceptionHandlers, false,                              \
1023           "Print exception handler tables for all nmethods when generated") \
1024                                                                             \
1025   develop(bool, StressCompiledExceptionHandlers, false,                     \
1026           "Exercise compiled exception handlers")                           \
1027                                                                             \
1028   develop(bool, InterceptOSException, false,                                \
1029           "Start debugger when an implicit OS (e.g. NULL) "                 \
1030           "exception happens")                                              \
1031                                                                             \
1032   product(bool, PrintCodeCache, false,                                      \
1033           "Print the code cache memory usage when exiting")                 \
1034                                                                             \
1035   develop(bool, PrintCodeCache2, false,                                     \
1036           "Print detailed usage information on the code cache when exiting")\
1037                                                                             \
1038   product(bool, PrintCodeCacheOnCompilation, false,                         \
1039           "Print the code cache memory usage each time a method is "        \
1040           "compiled")                                                       \
1041                                                                             \
1042   diagnostic(bool, PrintStubCode, false,                                    \
1043           "Print generated stub code")                                      \
1044                                                                             \
1045   product(bool, StackTraceInThrowable, true,                                \
1046           "Collect backtrace in throwable when exception happens")          \
1047                                                                             \
1048   product(bool, OmitStackTraceInFastThrow, true,                            \
1049           "Omit backtraces for some 'hot' exceptions in optimized code")    \
1050                                                                             \
1051   product(bool, ProfilerPrintByteCodeStatistics, false,                     \
1052           "Print bytecode statistics when dumping profiler output")         \
1053                                                                             \
1054   product(bool, ProfilerRecordPC, false,                                    \
1055           "Collect ticks for each 16 byte interval of compiled code")       \
1056                                                                             \
1057   product(bool, ProfileVM, false,                                           \
1058           "Profile ticks that fall within VM (either in the VM Thread "     \
1059           "or VM code called through stubs)")                               \
1060                                                                             \
1061   product(bool, ProfileIntervals, false,                                    \
1062           "Print profiles for each interval (see ProfileIntervalsTicks)")   \
1063                                                                             \
1064   notproduct(bool, ProfilerCheckIntervals, false,                           \
1065           "Collect and print information on spacing of profiler ticks")     \
1066                                                                             \
1067   develop(bool, PrintJVMWarnings, false,                                    \
1068           "Print warnings for unimplemented JVM functions")                 \
1069                                                                             \
1070   product(bool, PrintWarnings, true,                                        \
1071           "Print JVM warnings to output stream")                            \
1072                                                                             \
1073   notproduct(uintx, WarnOnStalledSpinLock, 0,                               \
1074           "Print warnings for stalled SpinLocks")                           \
1075                                                                             \
1076   product(bool, RegisterFinalizersAtInit, true,                             \
1077           "Register finalizable objects at end of Object.<init> or "        \
1078           "after allocation")                                               \
1079                                                                             \
1080   develop(bool, RegisterReferences, true,                                   \
1081           "Tell whether the VM should register soft/weak/final/phantom "    \
1082           "references")                                                     \
1083                                                                             \
1084   develop(bool, IgnoreRewrites, false,                                      \
1085           "Suppress rewrites of bytecodes in the oopmap generator. "        \
1086           "This is unsafe!")                                                \
1087                                                                             \
1088   develop(bool, PrintCodeCacheExtension, false,                             \
1089           "Print extension of code cache")                                  \
1090                                                                             \
1091   develop(bool, UsePrivilegedStack, true,                                   \
1092           "Enable the security JVM functions")                              \
1093                                                                             \
1094   develop(bool, ProtectionDomainVerification, true,                         \
1095           "Verify protection domain before resolution in system dictionary")\
1096                                                                             \
1097   product(bool, ClassUnloading, true,                                       \
1098           "Do unloading of classes")                                        \
1099                                                                             \
1100   product(bool, ClassUnloadingWithConcurrentMark, true,                     \
1101           "Do unloading of classes with a concurrent marking cycle")        \
1102                                                                             \
1103   develop(bool, DisableStartThread, false,                                  \
1104           "Disable starting of additional Java threads "                    \
1105           "(for debugging only)")                                           \
1106                                                                             \
1107   develop(bool, MemProfiling, false,                                        \
1108           "Write memory usage profiling to log file")                       \
1109                                                                             \
1110   notproduct(bool, PrintSystemDictionaryAtExit, false,                      \
1111           "Print the system dictionary at exit")                            \
1112                                                                             \
1113   experimental(intx, PredictedLoadedClassCount, 0,                          \
1114           "Experimental: Tune loaded class cache starting size")            \
1115                                                                             \
1116   diagnostic(bool, UnsyncloadClass, false,                                  \
1117           "Unstable: VM calls loadClass unsynchronized. Custom "            \
1118           "class loader must call VM synchronized for findClass "           \
1119           "and defineClass.")                                               \
1120                                                                             \
1121   product(bool, AlwaysLockClassLoader, false,                               \
1122           "Require the VM to acquire the class loader lock before calling " \
1123           "loadClass() even for class loaders registering "                 \
1124           "as parallel capable")                                            \
1125                                                                             \
1126   product(bool, AllowParallelDefineClass, false,                            \
1127           "Allow parallel defineClass requests for class loaders "          \
1128           "registering as parallel capable")                                \
1129                                                                             \
1130   product(bool, MustCallLoadClassInternal, false,                           \
1131           "Call loadClassInternal() rather than loadClass()")               \
1132                                                                             \
1133   product_pd(bool, DontYieldALot,                                           \
1134           "Throw away obvious excess yield calls")                          \
1135                                                                             \
1136   product_pd(bool, ConvertSleepToYield,                                     \
1137           "Convert sleep(0) to thread yield "                               \
1138           "(may be off for Solaris to improve GUI)")                        \
1139                                                                             \
1140   product(bool, ConvertYieldToSleep, false,                                 \
1141           "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1142           "behavior")                                                       \
1143                                                                             \
1144   product(bool, UseBoundThreads, true,                                      \
1145           "Bind user level threads to kernel threads (for Solaris only)")   \
1146                                                                             \
1147   develop(bool, UseDetachedThreads, true,                                   \
1148           "Use detached threads that are recycled upon termination "        \
1149           "(for Solaris only)")                                             \
1150                                                                             \
1151   product(bool, UseLWPSynchronization, true,                                \
1152           "Use LWP-based instead of libthread-based synchronization "       \
1153           "(SPARC only)")                                                   \
1154                                                                             \
1155   experimental(ccstr, SyncKnobs, NULL,                                      \
1156                "(Unstable) Various monitor synchronization tunables")       \
1157                                                                             \
1158   experimental(intx, EmitSync, 0,                                           \
1159                "(Unsafe, Unstable) "                                        \
1160                "Control emission of inline sync fast-path code")            \
1161                                                                             \
1162   product(intx, MonitorBound, 0, "Bound Monitor population")                \
1163                                                                             \
1164   product(bool, MonitorInUseLists, false, "Track Monitors for Deflation")   \
1165                                                                             \
1166   experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) "                    \
1167                "Experimental Sync flags")                                   \
1168                                                                             \
1169   experimental(intx, SyncVerbose, 0, "(Unstable)")                          \
1170                                                                             \
1171   experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)")               \
1172                                                                             \
1173   experimental(intx, hashCode, 5,                                           \
1174                "(Unstable) select hashCode generation algorithm")           \
1175                                                                             \
1176   experimental(intx, WorkAroundNPTLTimedWaitHang, 1,                        \
1177                "(Unstable, Linux-specific) "                                \
1178                "avoid NPTL-FUTEX hang pthread_cond_timedwait")              \
1179                                                                             \
1180   product(bool, FilterSpuriousWakeups, true,                                \
1181           "When true prevents OS-level spurious, or premature, wakeups "    \
1182           "from Object.wait (Ignored for Windows)")                         \
1183                                                                             \
1184   experimental(intx, NativeMonitorTimeout, -1, "(Unstable)")                \
1185                                                                             \
1186   experimental(intx, NativeMonitorFlags, 0, "(Unstable)")                   \
1187                                                                             \
1188   experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)")              \
1189                                                                             \
1190   develop(bool, UsePthreads, false,                                         \
1191           "Use pthread-based instead of libthread-based synchronization "   \
1192           "(SPARC only)")                                                   \
1193                                                                             \
1194   product(bool, AdjustConcurrency, false,                                   \
1195           "Call thr_setconcurrency at thread creation time to avoid "       \
1196           "LWP starvation on MP systems (for Solaris Only)")                \
1197                                                                             \
1198   product(bool, ReduceSignalUsage, false,                                   \
1199           "Reduce the use of OS signals in Java and/or the VM")             \
1200                                                                             \
1201   develop_pd(bool, ShareVtableStubs,                                        \
1202           "Share vtable stubs (smaller code but worse branch prediction")   \
1203                                                                             \
1204   develop(bool, LoadLineNumberTables, true,                                 \
1205           "Tell whether the class file parser loads line number tables")    \
1206                                                                             \
1207   develop(bool, LoadLocalVariableTables, true,                              \
1208           "Tell whether the class file parser loads local variable tables") \
1209                                                                             \
1210   develop(bool, LoadLocalVariableTypeTables, true,                          \
1211           "Tell whether the class file parser loads local variable type"    \
1212           "tables")                                                         \
1213                                                                             \
1214   product(bool, AllowUserSignalHandlers, false,                             \
1215           "Do not complain if the application installs signal handlers "    \
1216           "(Solaris & Linux only)")                                         \
1217                                                                             \
1218   product(bool, UseSignalChaining, true,                                    \
1219           "Use signal-chaining to invoke signal handlers installed "        \
1220           "by the application (Solaris & Linux only)")                      \
1221                                                                             \
1222   product(bool, UseAltSigs, false,                                          \
1223           "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM "      \
1224           "internal signals (Solaris only)")                                \
1225                                                                             \
1226   product(bool, AllowJNIEnvProxy, false,                                    \
1227           "Allow JNIEnv proxies for jdbx")                                  \
1228                                                                             \
1229   product(bool, JNIDetachReleasesMonitors, true,                            \
1230           "JNI DetachCurrentThread releases monitors owned by thread")      \
1231                                                                             \
1232   product(bool, RestoreMXCSROnJNICalls, false,                              \
1233           "Restore MXCSR when returning from JNI calls")                    \
1234                                                                             \
1235   product(bool, CheckJNICalls, false,                                       \
1236           "Verify all arguments to JNI calls")                              \
1237                                                                             \
1238   product(bool, CheckEndorsedAndExtDirs, false,                             \
1239           "Verify the endorsed and extension directories are not used")     \
1240                                                                             \
1241   product(bool, UseFastJNIAccessors, true,                                  \
1242           "Use optimized versions of Get<Primitive>Field")                  \
1243                                                                             \
1244   product(intx, MaxJNILocalCapacity, 65536,                                 \
1245           "Maximum allowable local JNI handle capacity to "                 \
1246           "EnsureLocalCapacity() and PushLocalFrame(), "                    \
1247           "where <= 0 is unlimited, default: 65536")                        \
1248                                                                             \
1249   product(bool, EagerXrunInit, false,                                       \
1250           "Eagerly initialize -Xrun libraries; allows startup profiling, "  \
1251           "but not all -Xrun libraries may support the state of the VM "    \
1252           "at this time")                                                   \
1253                                                                             \
1254   product(bool, PreserveAllAnnotations, false,                              \
1255           "Preserve RuntimeInvisibleAnnotations as well "                   \
1256           "as RuntimeVisibleAnnotations")                                   \
1257                                                                             \
1258   develop(uintx, PreallocatedOutOfMemoryErrorCount, 4,                      \
1259           "Number of OutOfMemoryErrors preallocated with backtrace")        \
1260                                                                             \
1261   product(bool, LazyBootClassLoader, true,                                  \
1262           "Enable/disable lazy opening of boot class path entries")         \
1263                                                                             \
1264   product(bool, UseXMMForArrayCopy, false,                                  \
1265           "Use SSE2 MOVQ instruction for Arraycopy")                        \
1266                                                                             \
1267   product(intx, FieldsAllocationStyle, 1,                                   \
1268           "0 - type based with oops first, 1 - with oops last, "            \
1269           "2 - oops in super and sub classes are together")                 \
1270                                                                             \
1271   product(bool, CompactFields, true,                                        \
1272           "Allocate nonstatic fields in gaps between previous fields")      \
1273                                                                             \
1274   notproduct(bool, PrintFieldLayout, false,                                 \
1275           "Print field layout for each class")                              \
1276                                                                             \
1277   product(intx, ContendedPaddingWidth, 128,                                 \
1278           "How many bytes to pad the fields/classes marked @Contended with")\
1279                                                                             \
1280   product(bool, EnableContended, true,                                      \
1281           "Enable @Contended annotation support")                           \
1282                                                                             \
1283   product(bool, RestrictContended, true,                                    \
1284           "Restrict @Contended to trusted classes")                         \
1285                                                                             \
1286   product(bool, UseBiasedLocking, true,                                     \
1287           "Enable biased locking in JVM")                                   \
1288                                                                             \
1289   product(intx, BiasedLockingStartupDelay, 4000,                            \
1290           "Number of milliseconds to wait before enabling biased locking")  \
1291                                                                             \
1292   diagnostic(bool, PrintBiasedLockingStatistics, false,                     \
1293           "Print statistics of biased locking in JVM")                      \
1294                                                                             \
1295   product(intx, BiasedLockingBulkRebiasThreshold, 20,                       \
1296           "Threshold of number of revocations per type to try to "          \
1297           "rebias all objects in the heap of that type")                    \
1298                                                                             \
1299   product(intx, BiasedLockingBulkRevokeThreshold, 40,                       \
1300           "Threshold of number of revocations per type to permanently "     \
1301           "revoke biases of all objects in the heap of that type")          \
1302                                                                             \
1303   product(intx, BiasedLockingDecayTime, 25000,                              \
1304           "Decay time (in milliseconds) to re-enable bulk rebiasing of a "  \
1305           "type after previous bulk rebias")                                \
1306                                                                             \
1307   /* tracing */                                                             \
1308                                                                             \
1309   notproduct(bool, TraceRuntimeCalls, false,                                \
1310           "Trace run-time calls")                                           \
1311                                                                             \
1312   develop(bool, TraceJNICalls, false,                                       \
1313           "Trace JNI calls")                                                \
1314                                                                             \
1315   develop(bool, StressRewriter, false,                                      \
1316           "Stress linktime bytecode rewriting")                             \
1317                                                                             \
1318   notproduct(bool, TraceJVMCalls, false,                                    \
1319           "Trace JVM calls")                                                \
1320                                                                             \
1321   product(ccstr, TraceJVMTI, NULL,                                          \
1322           "Trace flags for JVMTI functions and events")                     \
1323                                                                             \
1324   /* This option can change an EMCP method into an obsolete method. */      \
1325   /* This can affect tests that except specific methods to be EMCP. */      \
1326   /* This option should be used with caution. */                            \
1327   product(bool, StressLdcRewrite, false,                                    \
1328           "Force ldc -> ldc_w rewrite during RedefineClasses")              \
1329                                                                             \
1330   product(intx, TraceRedefineClasses, 0,                                    \
1331           "Trace level for JVMTI RedefineClasses")                          \
1332                                                                             \
1333   develop(bool, StressMethodComparator, false,                              \
1334           "Run the MethodComparator on all loaded methods")                 \
1335                                                                             \
1336   /* change to false by default sometime after Mustang */                   \
1337   product(bool, VerifyMergedCPBytecodes, true,                              \
1338           "Verify bytecodes after RedefineClasses constant pool merging")   \
1339                                                                             \
1340   develop(bool, TraceJNIHandleAllocation, false,                            \
1341           "Trace allocation/deallocation of JNI handle blocks")             \
1342                                                                             \
1343   develop(bool, TraceBytecodes, false,                                      \
1344           "Trace bytecode execution")                                       \
1345                                                                             \
1346   develop(bool, TraceClassInitialization, false,                            \
1347           "Trace class initialization")                                     \
1348                                                                             \
1349   product(bool, TraceExceptions, false,                                     \
1350           "Trace exceptions")                                               \
1351                                                                             \
1352   develop(bool, TraceICs, false,                                            \
1353           "Trace inline cache changes")                                     \
1354                                                                             \
1355   notproduct(bool, TraceInvocationCounterOverflow, false,                   \
1356           "Trace method invocation counter overflow")                       \
1357                                                                             \
1358   develop(bool, TraceInlineCacheClearing, false,                            \
1359           "Trace clearing of inline caches in nmethods")                    \
1360                                                                             \
1361   develop(bool, TraceDependencies, false,                                   \
1362           "Trace dependencies")                                             \
1363                                                                             \
1364   develop(bool, VerifyDependencies, trueInDebug,                            \
1365           "Exercise and verify the compilation dependency mechanism")       \
1366                                                                             \
1367   develop(bool, TraceNewOopMapGeneration, false,                            \
1368           "Trace OopMapGeneration")                                         \
1369                                                                             \
1370   develop(bool, TraceNewOopMapGenerationDetailed, false,                    \
1371           "Trace OopMapGeneration: print detailed cell states")             \
1372                                                                             \
1373   develop(bool, TimeOopMap, false,                                          \
1374           "Time calls to GenerateOopMap::compute_map() in sum")             \
1375                                                                             \
1376   develop(bool, TimeOopMap2, false,                                         \
1377           "Time calls to GenerateOopMap::compute_map() individually")       \
1378                                                                             \
1379   develop(bool, TraceMonitorMismatch, false,                                \
1380           "Trace monitor matching failures during OopMapGeneration")        \
1381                                                                             \
1382   develop(bool, TraceOopMapRewrites, false,                                 \
1383           "Trace rewriting of method oops during oop map generation")       \
1384                                                                             \
1385   develop(bool, TraceSafepoint, false,                                      \
1386           "Trace safepoint operations")                                     \
1387                                                                             \
1388   develop(bool, TraceICBuffer, false,                                       \
1389           "Trace usage of IC buffer")                                       \
1390                                                                             \
1391   develop(bool, TraceCompiledIC, false,                                     \
1392           "Trace changes of compiled IC")                                   \
1393                                                                             \
1394   notproduct(bool, TraceZapDeadLocals, false,                               \
1395           "Trace zapping dead locals")                                      \
1396                                                                             \
1397   develop(bool, TraceStartupTime, false,                                    \
1398           "Trace setup time")                                               \
1399                                                                             \
1400   develop(bool, TraceProtectionDomainVerification, false,                   \
1401           "Trace protection domain verification")                           \
1402                                                                             \
1403   develop(bool, TraceClearedExceptions, false,                              \
1404           "Print when an exception is forcibly cleared")                    \
1405                                                                             \
1406   product(bool, TraceClassResolution, false,                                \
1407           "Trace all constant pool resolutions (for debugging)")            \
1408                                                                             \
1409   product(bool, TraceBiasedLocking, false,                                  \
1410           "Trace biased locking in JVM")                                    \
1411                                                                             \
1412   product(bool, TraceMonitorInflation, false,                               \
1413           "Trace monitor inflation in JVM")                                 \
1414                                                                             \
1415   /* gc */                                                                  \
1416                                                                             \
1417   product(bool, UseSerialGC, false,                                         \
1418           "Use the Serial garbage collector")                               \
1419                                                                             \
1420   product(bool, UseG1GC, false,                                             \
1421           "Use the Garbage-First garbage collector")                        \
1422                                                                             \
1423   product(bool, UseParallelGC, false,                                       \
1424           "Use the Parallel Scavenge garbage collector")                    \
1425                                                                             \
1426   product(bool, UseParallelOldGC, false,                                    \
1427           "Use the Parallel Old garbage collector")                         \
1428                                                                             \
1429   product(uintx, HeapMaximumCompactionInterval, 20,                         \
1430           "How often should we maximally compact the heap (not allowing "   \
1431           "any dead space)")                                                \
1432                                                                             \
1433   product(uintx, HeapFirstMaximumCompactionCount, 3,                        \
1434           "The collection count for the first maximum compaction")          \
1435                                                                             \
1436   product(bool, UseMaximumCompactionOnSystemGC, true,                       \
1437           "Use maximum compaction in the Parallel Old garbage collector "   \
1438           "for a system GC")                                                \
1439                                                                             \
1440   product(uintx, ParallelOldDeadWoodLimiterMean, 50,                        \
1441           "The mean used by the parallel compact dead wood "                \
1442           "limiter (a number between 0-100)")                               \
1443                                                                             \
1444   product(uintx, ParallelOldDeadWoodLimiterStdDev, 80,                      \
1445           "The standard deviation used by the parallel compact dead wood "  \
1446           "limiter (a number between 0-100)")                               \
1447                                                                             \
1448   product(uintx, ParallelGCThreads, 0,                                      \
1449           "Number of parallel threads parallel gc will use")                \
1450                                                                             \
1451   product(bool, UseDynamicNumberOfGCThreads, false,                         \
1452           "Dynamically choose the number of parallel threads "              \
1453           "parallel gc will use")                                           \
1454                                                                             \
1455   diagnostic(bool, ForceDynamicNumberOfGCThreads, false,                    \
1456           "Force dynamic selection of the number of "                       \
1457           "parallel threads parallel gc will use to aid debugging")         \
1458                                                                             \
1459   product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M),               \
1460           "Size of heap (bytes) per GC thread used in calculating the "     \
1461           "number of GC threads")                                           \
1462                                                                             \
1463   product(bool, TraceDynamicGCThreads, false,                               \
1464           "Trace the dynamic GC thread usage")                              \
1465                                                                             \
1466   develop(bool, ParallelOldGCSplitALot, false,                              \
1467           "Provoke splitting (copying data from a young gen space to "      \
1468           "multiple destination spaces)")                                   \
1469                                                                             \
1470   develop(uintx, ParallelOldGCSplitInterval, 3,                             \
1471           "How often to provoke splitting a young gen space")               \
1472                                                                             \
1473   product(uintx, ConcGCThreads, 0,                                          \
1474           "Number of threads concurrent gc will use")                       \
1475                                                                             \
1476   product(uintx, YoungPLABSize, 4096,                                       \
1477           "Size of young gen promotion LAB's (in HeapWords)")               \
1478                                                                             \
1479   product(uintx, OldPLABSize, 1024,                                         \
1480           "Size of old gen promotion LAB's (in HeapWords), or Number        \
1481           of blocks to attempt to claim when refilling CMS LAB's")          \
1482                                                                             \
1483   product(uintx, GCTaskTimeStampEntries, 200,                               \
1484           "Number of time stamp entries per gc worker thread")              \
1485                                                                             \
1486   product(bool, AlwaysTenure, false,                                        \
1487           "Always tenure objects in eden (ParallelGC only)")                \
1488                                                                             \
1489   product(bool, NeverTenure, false,                                         \
1490           "Never tenure objects in eden, may tenure on overflow "           \
1491           "(ParallelGC only)")                                              \
1492                                                                             \
1493   product(bool, ScavengeBeforeFullGC, true,                                 \
1494           "Scavenge youngest generation before each full GC.")              \
1495                                                                             \
1496   develop(bool, ScavengeWithObjectsInToSpace, false,                        \
1497           "Allow scavenges to occur when to-space contains objects")        \
1498                                                                             \
1499   product(bool, UseConcMarkSweepGC, false,                                  \
1500           "Use Concurrent Mark-Sweep GC in the old generation")             \
1501                                                                             \
1502   product(bool, ExplicitGCInvokesConcurrent, false,                         \
1503           "A System.gc() request invokes a concurrent collection; "         \
1504           "(effective only when UseConcMarkSweepGC)")                       \
1505                                                                             \
1506   product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false,        \
1507           "A System.gc() request invokes a concurrent collection and "      \
1508           "also unloads classes during such a concurrent gc cycle "         \
1509           "(effective only when UseConcMarkSweepGC)")                       \
1510                                                                             \
1511   product(bool, GCLockerInvokesConcurrent, false,                           \
1512           "The exit of a JNI critical section necessitating a scavenge, "   \
1513           "also kicks off a background concurrent collection")              \
1514                                                                             \
1515   product(uintx, GCLockerEdenExpansionPercent, 5,                           \
1516           "How much the GC can expand the eden by while the GC locker "     \
1517           "is active (as a percentage)")                                    \
1518                                                                             \
1519   diagnostic(intx, GCLockerRetryAllocationCount, 2,                         \
1520           "Number of times to retry allocations when "                      \
1521           "blocked by the GC locker")                                       \
1522                                                                             \
1523   develop(bool, UseCMSAdaptiveFreeLists, true,                              \
1524           "Use adaptive free lists in the CMS generation")                  \
1525                                                                             \
1526   develop(bool, UseAsyncConcMarkSweepGC, true,                              \
1527           "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1528                                                                             \
1529   product(bool, UseCMSBestFit, true,                                        \
1530           "Use CMS best fit allocation strategy")                           \
1531                                                                             \
1532   product(bool, UseParNewGC, false,                                         \
1533           "Use parallel threads in the new generation")                     \
1534                                                                             \
1535   product(bool, PrintTaskqueue, false,                                      \
1536           "Print taskqueue statistics for parallel collectors")             \
1537                                                                             \
1538   product(bool, PrintTerminationStats, false,                               \
1539           "Print termination statistics for parallel collectors")           \
1540                                                                             \
1541   product(uintx, ParallelGCBufferWastePct, 10,                              \
1542           "Wasted fraction of parallel allocation buffer")                  \
1543                                                                             \
1544   diagnostic(bool, ParallelGCRetainPLAB, false,                             \
1545           "Retain parallel allocation buffers across scavenges; "           \
1546           "it is disabled because this currently conflicts with "           \
1547           "parallel card scanning under certain conditions.")               \
1548                                                                             \
1549   product(uintx, TargetPLABWastePct, 10,                                    \
1550           "Target wasted space in last buffer as percent of overall "       \
1551           "allocation")                                                     \
1552                                                                             \
1553   product(uintx, PLABWeight, 75,                                            \
1554           "Percentage (0-100) used to weight the current sample when "      \
1555           "computing exponentially decaying average for ResizePLAB")        \
1556                                                                             \
1557   product(bool, ResizePLAB, true,                                           \
1558           "Dynamically resize (survivor space) promotion LAB's")            \
1559                                                                             \
1560   product(bool, PrintPLAB, false,                                           \
1561           "Print (survivor space) promotion LAB's sizing decisions")        \
1562                                                                             \
1563   product(intx, ParGCArrayScanChunk, 50,                                    \
1564           "Scan a subset of object array and push remainder, if array is "  \
1565           "bigger than this")                                               \
1566                                                                             \
1567   product(bool, ParGCUseLocalOverflow, false,                               \
1568           "Instead of a global overflow list, use local overflow stacks")   \
1569                                                                             \
1570   product(bool, ParGCTrimOverflow, true,                                    \
1571           "Eagerly trim the local overflow lists "                          \
1572           "(when ParGCUseLocalOverflow)")                                   \
1573                                                                             \
1574   notproduct(bool, ParGCWorkQueueOverflowALot, false,                       \
1575           "Simulate work queue overflow in ParNew")                         \
1576                                                                             \
1577   notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000,                   \
1578           "An `interval' counter that determines how frequently "           \
1579           "we simulate overflow; a smaller number increases frequency")     \
1580                                                                             \
1581   product(uintx, ParGCDesiredObjsFromOverflowList, 20,                      \
1582           "The desired number of objects to claim from the overflow list")  \
1583                                                                             \
1584   diagnostic(uintx, ParGCStridesPerThread, 2,                               \
1585           "The number of strides per worker thread that we divide up the "  \
1586           "card table scanning work into")                                  \
1587                                                                             \
1588   diagnostic(intx, ParGCCardsPerStrideChunk, 256,                           \
1589           "The number of cards in each chunk of the parallel chunks used "  \
1590           "during card table scanning")                                     \
1591                                                                             \
1592   product(uintx, OldPLABWeight, 50,                                         \
1593           "Percentage (0-100) used to weight the current sample when "      \
1594           "computing exponentially decaying average for resizing "          \
1595           "OldPLABSize")                                                    \
1596                                                                             \
1597   product(bool, ResizeOldPLAB, true,                                        \
1598           "Dynamically resize (old gen) promotion LAB's")                   \
1599                                                                             \
1600   product(bool, PrintOldPLAB, false,                                        \
1601           "Print (old gen) promotion LAB's sizing decisions")               \
1602                                                                             \
1603   product(uintx, CMSOldPLABMin, 16,                                         \
1604           "Minimum size of CMS gen promotion LAB caches per worker "        \
1605           "per block size")                                                 \
1606                                                                             \
1607   product(uintx, CMSOldPLABMax, 1024,                                       \
1608           "Maximum size of CMS gen promotion LAB caches per worker "        \
1609           "per block size")                                                 \
1610                                                                             \
1611   product(uintx, CMSOldPLABNumRefills, 4,                                   \
1612           "Nominal number of refills of CMS gen promotion LAB cache "       \
1613           "per worker per block size")                                      \
1614                                                                             \
1615   product(bool, CMSOldPLABResizeQuicker, false,                             \
1616           "React on-the-fly during a scavenge to a sudden "                 \
1617           "change in block demand rate")                                    \
1618                                                                             \
1619   product(uintx, CMSOldPLABToleranceFactor, 4,                              \
1620           "The tolerance of the phase-change detector for on-the-fly "      \
1621           "PLAB resizing during a scavenge")                                \
1622                                                                             \
1623   product(uintx, CMSOldPLABReactivityFactor, 2,                             \
1624           "The gain in the feedback loop for on-the-fly PLAB resizing "     \
1625           "during a scavenge")                                              \
1626                                                                             \
1627   product(bool, AlwaysPreTouch, false,                                      \
1628           "Force all freshly committed pages to be pre-touched")            \
1629                                                                             \
1630   product_pd(uintx, CMSYoungGenPerWorker,                                   \
1631           "The maximum size of young gen chosen by default per GC worker "  \
1632           "thread available")                                               \
1633                                                                             \
1634   product(uintx, CMSIncrementalSafetyFactor, 10,                            \
1635           "Percentage (0-100) used to add conservatism when computing the " \
1636           "duty cycle")                                                     \
1637                                                                             \
1638   product(uintx, CMSExpAvgFactor, 50,                                       \
1639           "Percentage (0-100) used to weight the current sample when "      \
1640           "computing exponential averages for CMS statistics")              \
1641                                                                             \
1642   product(uintx, CMS_FLSWeight, 75,                                         \
1643           "Percentage (0-100) used to weight the current sample when "      \
1644           "computing exponentially decaying averages for CMS FLS "          \
1645           "statistics")                                                     \
1646                                                                             \
1647   product(uintx, CMS_FLSPadding, 1,                                         \
1648           "The multiple of deviation from mean to use for buffering "       \
1649           "against volatility in free list demand")                         \
1650                                                                             \
1651   product(uintx, FLSCoalescePolicy, 2,                                      \
1652           "CMS: aggressiveness level for coalescing, increasing "           \
1653           "from 0 to 4")                                                    \
1654                                                                             \
1655   product(bool, FLSAlwaysCoalesceLarge, false,                              \
1656           "CMS: larger free blocks are always available for coalescing")    \
1657                                                                             \
1658   product(double, FLSLargestBlockCoalesceProximity, 0.99,                   \
1659           "CMS: the smaller the percentage the greater the coalescing "     \
1660           "force")                                                          \
1661                                                                             \
1662   product(double, CMSSmallCoalSurplusPercent, 1.05,                         \
1663           "CMS: the factor by which to inflate estimated demand of small "  \
1664           "block sizes to prevent coalescing with an adjoining block")      \
1665                                                                             \
1666   product(double, CMSLargeCoalSurplusPercent, 0.95,                         \
1667           "CMS: the factor by which to inflate estimated demand of large "  \
1668           "block sizes to prevent coalescing with an adjoining block")      \
1669                                                                             \
1670   product(double, CMSSmallSplitSurplusPercent, 1.10,                        \
1671           "CMS: the factor by which to inflate estimated demand of small "  \
1672           "block sizes to prevent splitting to supply demand for smaller "  \
1673           "blocks")                                                         \
1674                                                                             \
1675   product(double, CMSLargeSplitSurplusPercent, 1.00,                        \
1676           "CMS: the factor by which to inflate estimated demand of large "  \
1677           "block sizes to prevent splitting to supply demand for smaller "  \
1678           "blocks")                                                         \
1679                                                                             \
1680   product(bool, CMSExtrapolateSweep, false,                                 \
1681           "CMS: cushion for block demand during sweep")                     \
1682                                                                             \
1683   product(uintx, CMS_SweepWeight, 75,                                       \
1684           "Percentage (0-100) used to weight the current sample when "      \
1685           "computing exponentially decaying average for inter-sweep "       \
1686           "duration")                                                       \
1687                                                                             \
1688   product(uintx, CMS_SweepPadding, 1,                                       \
1689           "The multiple of deviation from mean to use for buffering "       \
1690           "against volatility in inter-sweep duration")                     \
1691                                                                             \
1692   product(uintx, CMS_SweepTimerThresholdMillis, 10,                         \
1693           "Skip block flux-rate sampling for an epoch unless inter-sweep "  \
1694           "duration exceeds this threshold in milliseconds")                \
1695                                                                             \
1696   product(bool, CMSClassUnloadingEnabled, true,                             \
1697           "Whether class unloading enabled when using CMS GC")              \
1698                                                                             \
1699   product(uintx, CMSClassUnloadingMaxInterval, 0,                           \
1700           "When CMS class unloading is enabled, the maximum CMS cycle "     \
1701           "count for which classes may not be unloaded")                    \
1702                                                                             \
1703   develop(intx, CMSDictionaryChoice, 0,                                     \
1704           "Use BinaryTreeDictionary as default in the CMS generation")      \
1705                                                                             \
1706   product(uintx, CMSIndexedFreeListReplenish, 4,                            \
1707           "Replenish an indexed free list with this number of chunks")      \
1708                                                                             \
1709   product(bool, CMSReplenishIntermediate, true,                             \
1710           "Replenish all intermediate free-list caches")                    \
1711                                                                             \
1712   product(bool, CMSSplitIndexedFreeListBlocks, true,                        \
1713           "When satisfying batched demand, split blocks from the "          \
1714           "IndexedFreeList whose size is a multiple of requested size")     \
1715                                                                             \
1716   product(bool, CMSLoopWarn, false,                                         \
1717           "Warn in case of excessive CMS looping")                          \
1718                                                                             \
1719   develop(bool, CMSOverflowEarlyRestoration, false,                         \
1720           "Restore preserved marks early")                                  \
1721                                                                             \
1722   product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M),              \
1723           "Size of marking stack")                                          \
1724                                                                             \
1725   product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M),          \
1726           "Maximum size of marking stack")                                  \
1727                                                                             \
1728   notproduct(bool, CMSMarkStackOverflowALot, false,                         \
1729           "Simulate frequent marking stack / work queue overflow")          \
1730                                                                             \
1731   notproduct(uintx, CMSMarkStackOverflowInterval, 1000,                     \
1732           "An \"interval\" counter that determines how frequently "         \
1733           "to simulate overflow; a smaller number increases frequency")     \
1734                                                                             \
1735   product(uintx, CMSMaxAbortablePrecleanLoops, 0,                           \
1736           "Maximum number of abortable preclean iterations, if > 0")        \
1737                                                                             \
1738   product(intx, CMSMaxAbortablePrecleanTime, 5000,                          \
1739           "Maximum time in abortable preclean (in milliseconds)")           \
1740                                                                             \
1741   product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100,              \
1742           "Nominal minimum work per abortable preclean iteration")          \
1743                                                                             \
1744   manageable(intx, CMSAbortablePrecleanWaitMillis, 100,                     \
1745           "Time that we sleep between iterations when not given "           \
1746           "enough work per iteration")                                      \
1747                                                                             \
1748   product(uintx, CMSRescanMultiple, 32,                                     \
1749           "Size (in cards) of CMS parallel rescan task")                    \
1750                                                                             \
1751   product(uintx, CMSConcMarkMultiple, 32,                                   \
1752           "Size (in cards) of CMS concurrent MT marking task")              \
1753                                                                             \
1754   product(bool, CMSAbortSemantics, false,                                   \
1755           "Whether abort-on-overflow semantics is implemented")             \
1756                                                                             \
1757   product(bool, CMSParallelInitialMarkEnabled, true,                        \
1758           "Use the parallel initial mark.")                                 \
1759                                                                             \
1760   product(bool, CMSParallelRemarkEnabled, true,                             \
1761           "Whether parallel remark enabled (only if ParNewGC)")             \
1762                                                                             \
1763   product(bool, CMSParallelSurvivorRemarkEnabled, true,                     \
1764           "Whether parallel remark of survivor space "                      \
1765           "enabled (effective only if CMSParallelRemarkEnabled)")           \
1766                                                                             \
1767   product(bool, CMSPLABRecordAlways, true,                                  \
1768           "Always record survivor space PLAB boundaries (effective only "   \
1769           "if CMSParallelSurvivorRemarkEnabled)")                           \
1770                                                                             \
1771   product(bool, CMSEdenChunksRecordAlways, true,                            \
1772           "Always record eden chunks used for the parallel initial mark "   \
1773           "or remark of eden")                                              \
1774                                                                             \
1775   product(bool, CMSPrintEdenSurvivorChunks, false,                          \
1776           "Print the eden and the survivor chunks used for the parallel "   \
1777           "initial mark or remark of the eden/survivor spaces")             \
1778                                                                             \
1779   product(bool, CMSConcurrentMTEnabled, true,                               \
1780           "Whether multi-threaded concurrent work enabled "                 \
1781           "(effective only if ParNewGC)")                                   \
1782                                                                             \
1783   product(bool, CMSPrecleaningEnabled, true,                                \
1784           "Whether concurrent precleaning enabled")                         \
1785                                                                             \
1786   product(uintx, CMSPrecleanIter, 3,                                        \
1787           "Maximum number of precleaning iteration passes")                 \
1788                                                                             \
1789   product(uintx, CMSPrecleanNumerator, 2,                                   \
1790           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1791           "ratio")                                                          \
1792                                                                             \
1793   product(uintx, CMSPrecleanDenominator, 3,                                 \
1794           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1795           "ratio")                                                          \
1796                                                                             \
1797   product(bool, CMSPrecleanRefLists1, true,                                 \
1798           "Preclean ref lists during (initial) preclean phase")             \
1799                                                                             \
1800   product(bool, CMSPrecleanRefLists2, false,                                \
1801           "Preclean ref lists during abortable preclean phase")             \
1802                                                                             \
1803   product(bool, CMSPrecleanSurvivors1, false,                               \
1804           "Preclean survivors during (initial) preclean phase")             \
1805                                                                             \
1806   product(bool, CMSPrecleanSurvivors2, true,                                \
1807           "Preclean survivors during abortable preclean phase")             \
1808                                                                             \
1809   product(uintx, CMSPrecleanThreshold, 1000,                                \
1810           "Do not iterate again if number of dirty cards is less than this")\
1811                                                                             \
1812   product(bool, CMSCleanOnEnter, true,                                      \
1813           "Clean-on-enter optimization for reducing number of dirty cards") \
1814                                                                             \
1815   product(uintx, CMSRemarkVerifyVariant, 1,                                 \
1816           "Choose variant (1,2) of verification following remark")          \
1817                                                                             \
1818   product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M,                   \
1819           "If Eden size is below this, do not try to schedule remark")      \
1820                                                                             \
1821   product(uintx, CMSScheduleRemarkEdenPenetration, 50,                      \
1822           "The Eden occupancy percentage (0-100) at which "                 \
1823           "to try and schedule remark pause")                               \
1824                                                                             \
1825   product(uintx, CMSScheduleRemarkSamplingRatio, 5,                         \
1826           "Start sampling eden top at least before young gen "              \
1827           "occupancy reaches 1/<ratio> of the size at which "               \
1828           "we plan to schedule remark")                                     \
1829                                                                             \
1830   product(uintx, CMSSamplingGrain, 16*K,                                    \
1831           "The minimum distance between eden samples for CMS (see above)")  \
1832                                                                             \
1833   product(bool, CMSScavengeBeforeRemark, false,                             \
1834           "Attempt scavenge before the CMS remark step")                    \
1835                                                                             \
1836   develop(bool, CMSTraceSweeper, false,                                     \
1837           "Trace some actions of the CMS sweeper")                          \
1838                                                                             \
1839   product(uintx, CMSWorkQueueDrainThreshold, 10,                            \
1840           "Don't drain below this size per parallel worker/thief")          \
1841                                                                             \
1842   manageable(intx, CMSWaitDuration, 2000,                                   \
1843           "Time in milliseconds that CMS thread waits for young GC")        \
1844                                                                             \
1845   develop(uintx, CMSCheckInterval, 1000,                                    \
1846           "Interval in milliseconds that CMS thread checks if it "          \
1847           "should start a collection cycle")                                \
1848                                                                             \
1849   product(bool, CMSYield, true,                                             \
1850           "Yield between steps of CMS")                                     \
1851                                                                             \
1852   product(uintx, CMSBitMapYieldQuantum, 10*M,                               \
1853           "Bitmap operations should process at most this many bits "        \
1854           "between yields")                                                 \
1855                                                                             \
1856   product(bool, CMSDumpAtPromotionFailure, false,                           \
1857           "Dump useful information about the state of the CMS old "         \
1858           "generation upon a promotion failure")                            \
1859                                                                             \
1860   product(bool, CMSPrintChunksInDump, false,                                \
1861           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1862           "more detailed information about the free chunks")                \
1863                                                                             \
1864   product(bool, CMSPrintObjectsInDump, false,                               \
1865           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1866           "more detailed information about the allocated objects")          \
1867                                                                             \
1868   diagnostic(bool, FLSVerifyAllHeapReferences, false,                       \
1869           "Verify that all references across the FLS boundary "             \
1870           "are to valid objects")                                           \
1871                                                                             \
1872   diagnostic(bool, FLSVerifyLists, false,                                   \
1873           "Do lots of (expensive) FreeListSpace verification")              \
1874                                                                             \
1875   diagnostic(bool, FLSVerifyIndexTable, false,                              \
1876           "Do lots of (expensive) FLS index table verification")            \
1877                                                                             \
1878   develop(bool, FLSVerifyDictionary, false,                                 \
1879           "Do lots of (expensive) FLS dictionary verification")             \
1880                                                                             \
1881   develop(bool, VerifyBlockOffsetArray, false,                              \
1882           "Do (expensive) block offset array verification")                 \
1883                                                                             \
1884   diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false,              \
1885           "Maintain _unallocated_block in BlockOffsetArray "                \
1886           "(currently applicable only to CMS collector)")                   \
1887                                                                             \
1888   develop(bool, TraceCMSState, false,                                       \
1889           "Trace the state of the CMS collection")                          \
1890                                                                             \
1891   product(intx, RefDiscoveryPolicy, 0,                                      \
1892           "Select type of reference discovery policy: "                     \
1893           "reference-based(0) or referent-based(1)")                        \
1894                                                                             \
1895   product(bool, ParallelRefProcEnabled, false,                              \
1896           "Enable parallel reference processing whenever possible")         \
1897                                                                             \
1898   product(bool, ParallelRefProcBalancingEnabled, true,                      \
1899           "Enable balancing of reference processing queues")                \
1900                                                                             \
1901   product(uintx, CMSTriggerRatio, 80,                                       \
1902           "Percentage of MinHeapFreeRatio in CMS generation that is "       \
1903           "allocated before a CMS collection cycle commences")              \
1904                                                                             \
1905   product(uintx, CMSBootstrapOccupancy, 50,                                 \
1906           "Percentage CMS generation occupancy at which to "                \
1907           "initiate CMS collection for bootstrapping collection stats")     \
1908                                                                             \
1909   product(intx, CMSInitiatingOccupancyFraction, -1,                         \
1910           "Percentage CMS generation occupancy to start a CMS collection "  \
1911           "cycle. A negative value means that CMSTriggerRatio is used")     \
1912                                                                             \
1913   product(uintx, InitiatingHeapOccupancyPercent, 45,                        \
1914           "Percentage of the (entire) heap occupancy to start a "           \
1915           "concurrent GC cycle. It is used by GCs that trigger a "          \
1916           "concurrent GC cycle based on the occupancy of the entire heap, " \
1917           "not just one of the generations (e.g., G1). A value of 0 "       \
1918           "denotes 'do constant GC cycles'.")                               \
1919                                                                             \
1920   manageable(intx, CMSTriggerInterval, -1,                                  \
1921           "Commence a CMS collection cycle (at least) every so many "       \
1922           "milliseconds (0 permanently, -1 disabled)")                      \
1923                                                                             \
1924   product(bool, UseCMSInitiatingOccupancyOnly, false,                       \
1925           "Only use occupancy as a criterion for starting a CMS collection")\
1926                                                                             \
1927   product(uintx, CMSIsTooFullPercentage, 98,                                \
1928           "An absolute ceiling above which CMS will always consider the "   \
1929           "unloading of classes when class unloading is enabled")           \
1930                                                                             \
1931   develop(bool, CMSTestInFreeList, false,                                   \
1932           "Check if the coalesced range is already in the "                 \
1933           "free lists as claimed")                                          \
1934                                                                             \
1935   notproduct(bool, CMSVerifyReturnedBytes, false,                           \
1936           "Check that all the garbage collected was returned to the "       \
1937           "free lists")                                                     \
1938                                                                             \
1939   notproduct(bool, ScavengeALot, false,                                     \
1940           "Force scavenge at every Nth exit from the runtime system "       \
1941           "(N=ScavengeALotInterval)")                                       \
1942                                                                             \
1943   develop(bool, FullGCALot, false,                                          \
1944           "Force full gc at every Nth exit from the runtime system "        \
1945           "(N=FullGCALotInterval)")                                         \
1946                                                                             \
1947   notproduct(bool, GCALotAtAllSafepoints, false,                            \
1948           "Enforce ScavengeALot/GCALot at all potential safepoints")        \
1949                                                                             \
1950   product(bool, PrintPromotionFailure, false,                               \
1951           "Print additional diagnostic information following "              \
1952           "promotion failure")                                              \
1953                                                                             \
1954   notproduct(bool, PromotionFailureALot, false,                             \
1955           "Use promotion failure handling on every youngest generation "    \
1956           "collection")                                                     \
1957                                                                             \
1958   develop(uintx, PromotionFailureALotCount, 1000,                           \
1959           "Number of promotion failures occurring at ParGCAllocBuffer "     \
1960           "refill attempts (ParNew) or promotion attempts "                 \
1961           "(other young collectors)")                                       \
1962                                                                             \
1963   develop(uintx, PromotionFailureALotInterval, 5,                           \
1964           "Total collections between promotion failures a lot")             \
1965                                                                             \
1966   experimental(uintx, WorkStealingSleepMillis, 1,                           \
1967           "Sleep time when sleep is used for yields")                       \
1968                                                                             \
1969   experimental(uintx, WorkStealingYieldsBeforeSleep, 5000,                  \
1970           "Number of yields before a sleep is done during work stealing")   \
1971                                                                             \
1972   experimental(uintx, WorkStealingHardSpins, 4096,                          \
1973           "Number of iterations in a spin loop between checks on "          \
1974           "time out of hard spin")                                          \
1975                                                                             \
1976   experimental(uintx, WorkStealingSpinToYieldRatio, 10,                     \
1977           "Ratio of hard spins to calls to yield")                          \
1978                                                                             \
1979   develop(uintx, ObjArrayMarkingStride, 512,                                \
1980           "Number of object array elements to push onto the marking stack " \
1981           "before pushing a continuation entry")                            \
1982                                                                             \
1983   develop(bool, MetadataAllocationFailALot, false,                          \
1984           "Fail metadata allocations at intervals controlled by "           \
1985           "MetadataAllocationFailALotInterval")                             \
1986                                                                             \
1987   develop(uintx, MetadataAllocationFailALotInterval, 1000,                  \
1988           "Metadata allocation failure a lot interval")                     \
1989                                                                             \
1990   develop(bool, TraceMetadataChunkAllocation, false,                        \
1991           "Trace chunk metadata allocations")                               \
1992                                                                             \
1993   product(bool, TraceMetadataHumongousAllocation, false,                    \
1994           "Trace humongous metadata allocations")                           \
1995                                                                             \
1996   develop(bool, TraceMetavirtualspaceAllocation, false,                     \
1997           "Trace virtual space metadata allocations")                       \
1998                                                                             \
1999   notproduct(bool, ExecuteInternalVMTests, false,                           \
2000           "Enable execution of internal VM tests")                          \
2001                                                                             \
2002   notproduct(bool, VerboseInternalVMTests, false,                           \
2003           "Turn on logging for internal VM tests.")                         \
2004                                                                             \
2005   product_pd(bool, UseTLAB, "Use thread-local object allocation")           \
2006                                                                             \
2007   product_pd(bool, ResizeTLAB,                                              \
2008           "Dynamically resize TLAB size for threads")                       \
2009                                                                             \
2010   product(bool, ZeroTLAB, false,                                            \
2011           "Zero out the newly created TLAB")                                \
2012                                                                             \
2013   product(bool, FastTLABRefill, true,                                       \
2014           "Use fast TLAB refill code")                                      \
2015                                                                             \
2016   product(bool, PrintTLAB, false,                                           \
2017           "Print various TLAB related information")                         \
2018                                                                             \
2019   product(bool, TLABStats, true,                                            \
2020           "Provide more detailed and expensive TLAB statistics "            \
2021           "(with PrintTLAB)")                                               \
2022                                                                             \
2023   product_pd(bool, NeverActAsServerClassMachine,                            \
2024           "Never act like a server-class machine")                          \
2025                                                                             \
2026   product(bool, AlwaysActAsServerClassMachine, false,                       \
2027           "Always act like a server-class machine")                         \
2028                                                                             \
2029   product_pd(uint64_t, MaxRAM,                                              \
2030           "Real memory size (in bytes) used to set maximum heap size")      \
2031                                                                             \
2032   product(uintx, ErgoHeapSizeLimit, 0,                                      \
2033           "Maximum ergonomically set heap size (in bytes); zero means use " \
2034           "MaxRAM / MaxRAMFraction")                                        \
2035                                                                             \
2036   product(uintx, MaxRAMFraction, 4,                                         \
2037           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2038           "size")                                                           \
2039                                                                             \
2040   product(uintx, DefaultMaxRAMFraction, 4,                                  \
2041           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2042           "size; deprecated: to be renamed to MaxRAMFraction")              \
2043                                                                             \
2044   product(uintx, MinRAMFraction, 2,                                         \
2045           "Minimum fraction (1/n) of real memory used for maximum heap "    \
2046           "size on systems with small physical memory size")                \
2047                                                                             \
2048   product(uintx, InitialRAMFraction, 64,                                    \
2049           "Fraction (1/n) of real memory used for initial heap size")       \
2050                                                                             \
2051   develop(uintx, MaxVirtMemFraction, 2,                                     \
2052           "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2053           "determining maximum heap size")                                  \
2054                                                                             \
2055   product(bool, UseAutoGCSelectPolicy, false,                               \
2056           "Use automatic collection selection policy")                      \
2057                                                                             \
2058   product(uintx, AutoGCSelectPauseMillis, 5000,                             \
2059           "Automatic GC selection pause threshold in milliseconds")         \
2060                                                                             \
2061   product(bool, UseAdaptiveSizePolicy, true,                                \
2062           "Use adaptive generation sizing policies")                        \
2063                                                                             \
2064   product(bool, UsePSAdaptiveSurvivorSizePolicy, true,                      \
2065           "Use adaptive survivor sizing policies")                          \
2066                                                                             \
2067   product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true,     \
2068           "Use adaptive young-old sizing policies at minor collections")    \
2069                                                                             \
2070   product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true,     \
2071           "Use adaptive young-old sizing policies at major collections")    \
2072                                                                             \
2073   product(bool, UseAdaptiveSizePolicyWithSystemGC, false,                   \
2074           "Include statistics from System.gc() for adaptive size policy")   \
2075                                                                             \
2076   product(bool, UseAdaptiveGCBoundary, false,                               \
2077           "Allow young-old boundary to move")                               \
2078                                                                             \
2079   develop(bool, TraceAdaptiveGCBoundary, false,                             \
2080           "Trace young-old boundary moves")                                 \
2081                                                                             \
2082   develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1,             \
2083           "Resize the virtual spaces of the young or old generations")      \
2084                                                                             \
2085   product(uintx, AdaptiveSizeThroughPutPolicy, 0,                           \
2086           "Policy for changing generation size for throughput goals")       \
2087                                                                             \
2088   product(uintx, AdaptiveSizePausePolicy, 0,                                \
2089           "Policy for changing generation size for pause goals")            \
2090                                                                             \
2091   develop(bool, PSAdjustTenuredGenForMinorPause, false,                     \
2092           "Adjust tenured generation to achieve a minor pause goal")        \
2093                                                                             \
2094   develop(bool, PSAdjustYoungGenForMajorPause, false,                       \
2095           "Adjust young generation to achieve a major pause goal")          \
2096                                                                             \
2097   product(uintx, AdaptiveSizePolicyInitializingSteps, 20,                   \
2098           "Number of steps where heuristics is used before data is used")   \
2099                                                                             \
2100   develop(uintx, AdaptiveSizePolicyReadyThreshold, 5,                       \
2101           "Number of collections before the adaptive sizing is started")    \
2102                                                                             \
2103   product(uintx, AdaptiveSizePolicyOutputInterval, 0,                       \
2104           "Collection interval for printing information; zero means never") \
2105                                                                             \
2106   product(bool, UseAdaptiveSizePolicyFootprintGoal, true,                   \
2107           "Use adaptive minimum footprint as a goal")                       \
2108                                                                             \
2109   product(uintx, AdaptiveSizePolicyWeight, 10,                              \
2110           "Weight given to exponential resizing, between 0 and 100")        \
2111                                                                             \
2112   product(uintx, AdaptiveTimeWeight,       25,                              \
2113           "Weight given to time in adaptive policy, between 0 and 100")     \
2114                                                                             \
2115   product(uintx, PausePadding, 1,                                           \
2116           "How much buffer to keep for pause time")                         \
2117                                                                             \
2118   product(uintx, PromotedPadding, 3,                                        \
2119           "How much buffer to keep for promotion failure")                  \
2120                                                                             \
2121   product(uintx, SurvivorPadding, 3,                                        \
2122           "How much buffer to keep for survivor overflow")                  \
2123                                                                             \
2124   product(uintx, ThresholdTolerance, 10,                                    \
2125           "Allowed collection cost difference between generations")         \
2126                                                                             \
2127   product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50,                \
2128           "If collection costs are within margin, reduce both by full "     \
2129           "delta")                                                          \
2130                                                                             \
2131   product(uintx, YoungGenerationSizeIncrement, 20,                          \
2132           "Adaptive size percentage change in young generation")            \
2133                                                                             \
2134   product(uintx, YoungGenerationSizeSupplement, 80,                         \
2135           "Supplement to YoungedGenerationSizeIncrement used at startup")   \
2136                                                                             \
2137   product(uintx, YoungGenerationSizeSupplementDecay, 8,                     \
2138           "Decay factor to YoungedGenerationSizeSupplement")                \
2139                                                                             \
2140   product(uintx, TenuredGenerationSizeIncrement, 20,                        \
2141           "Adaptive size percentage change in tenured generation")          \
2142                                                                             \
2143   product(uintx, TenuredGenerationSizeSupplement, 80,                       \
2144           "Supplement to TenuredGenerationSizeIncrement used at startup")   \
2145                                                                             \
2146   product(uintx, TenuredGenerationSizeSupplementDecay, 2,                   \
2147           "Decay factor to TenuredGenerationSizeIncrement")                 \
2148                                                                             \
2149   product(uintx, MaxGCPauseMillis, max_uintx,                               \
2150           "Adaptive size policy maximum GC pause time goal in millisecond, "\
2151           "or (G1 Only) the maximum GC time per MMU time slice")            \
2152                                                                             \
2153   product(uintx, GCPauseIntervalMillis, 0,                                  \
2154           "Time slice for MMU specification")                               \
2155                                                                             \
2156   product(uintx, MaxGCMinorPauseMillis, max_uintx,                          \
2157           "Adaptive size policy maximum GC minor pause time goal "          \
2158           "in millisecond")                                                 \
2159                                                                             \
2160   product(uintx, GCTimeRatio, 99,                                           \
2161           "Adaptive size policy application time to GC time ratio")         \
2162                                                                             \
2163   product(uintx, AdaptiveSizeDecrementScaleFactor, 4,                       \
2164           "Adaptive size scale down factor for shrinking")                  \
2165                                                                             \
2166   product(bool, UseAdaptiveSizeDecayMajorGCCost, true,                      \
2167           "Adaptive size decays the major cost for long major intervals")   \
2168                                                                             \
2169   product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10,                     \
2170           "Time scale over which major costs decay")                        \
2171                                                                             \
2172   product(uintx, MinSurvivorRatio, 3,                                       \
2173           "Minimum ratio of young generation/survivor space size")          \
2174                                                                             \
2175   product(uintx, InitialSurvivorRatio, 8,                                   \
2176           "Initial ratio of young generation/survivor space size")          \
2177                                                                             \
2178   product(uintx, BaseFootPrintEstimate, 256*M,                              \
2179           "Estimate of footprint other than Java Heap")                     \
2180                                                                             \
2181   product(bool, UseGCOverheadLimit, true,                                   \
2182           "Use policy to limit of proportion of time spent in GC "          \
2183           "before an OutOfMemory error is thrown")                          \
2184                                                                             \
2185   product(uintx, GCTimeLimit, 98,                                           \
2186           "Limit of the proportion of time spent in GC before "             \
2187           "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)")      \
2188                                                                             \
2189   product(uintx, GCHeapFreeLimit, 2,                                        \
2190           "Minimum percentage of free space after a full GC before an "     \
2191           "OutOfMemoryError is thrown (used with GCTimeLimit)")             \
2192                                                                             \
2193   develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5,                 \
2194           "Number of consecutive collections before gc time limit fires")   \
2195                                                                             \
2196   product(bool, PrintAdaptiveSizePolicy, false,                             \
2197           "Print information about AdaptiveSizePolicy")                     \
2198                                                                             \
2199   product(intx, PrefetchCopyIntervalInBytes, -1,                            \
2200           "How far ahead to prefetch destination area (<= 0 means off)")    \
2201                                                                             \
2202   product(intx, PrefetchScanIntervalInBytes, -1,                            \
2203           "How far ahead to prefetch scan area (<= 0 means off)")           \
2204                                                                             \
2205   product(intx, PrefetchFieldsAhead, -1,                                    \
2206           "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2207                                                                             \
2208   diagnostic(bool, VerifySilently, false,                                   \
2209           "Do not print the verification progress")                         \
2210                                                                             \
2211   diagnostic(bool, VerifyDuringStartup, false,                              \
2212           "Verify memory system before executing any Java code "            \
2213           "during VM initialization")                                       \
2214                                                                             \
2215   diagnostic(bool, VerifyBeforeExit, trueInDebug,                           \
2216           "Verify system before exiting")                                   \
2217                                                                             \
2218   diagnostic(bool, VerifyBeforeGC, false,                                   \
2219           "Verify memory system before GC")                                 \
2220                                                                             \
2221   diagnostic(bool, VerifyAfterGC, false,                                    \
2222           "Verify memory system after GC")                                  \
2223                                                                             \
2224   diagnostic(bool, VerifyDuringGC, false,                                   \
2225           "Verify memory system during GC (between phases)")                \
2226                                                                             \
2227   diagnostic(bool, GCParallelVerificationEnabled, true,                     \
2228           "Enable parallel memory system verification")                     \
2229                                                                             \
2230   diagnostic(bool, DeferInitialCardMark, false,                             \
2231           "When +ReduceInitialCardMarks, explicitly defer any that "        \
2232           "may arise from new_pre_store_barrier")                           \
2233                                                                             \
2234   diagnostic(bool, VerifyRememberedSets, false,                             \
2235           "Verify GC remembered sets")                                      \
2236                                                                             \
2237   diagnostic(bool, VerifyObjectStartArray, true,                            \
2238           "Verify GC object start array if verify before/after")            \
2239                                                                             \
2240   product(bool, DisableExplicitGC, false,                                   \
2241           "Ignore calls to System.gc()")                                    \
2242                                                                             \
2243   notproduct(bool, CheckMemoryInitialization, false,                        \
2244           "Check memory initialization")                                    \
2245                                                                             \
2246   diagnostic(bool, BindCMSThreadToCPU, false,                               \
2247           "Bind CMS Thread to CPU if possible")                             \
2248                                                                             \
2249   diagnostic(uintx, CPUForCMSThread, 0,                                     \
2250           "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2251                                                                             \
2252   product(bool, BindGCTaskThreadsToCPUs, false,                             \
2253           "Bind GCTaskThreads to CPUs if possible")                         \
2254                                                                             \
2255   product(bool, UseGCTaskAffinity, false,                                   \
2256           "Use worker affinity when asking for GCTasks")                    \
2257                                                                             \
2258   product(uintx, ProcessDistributionStride, 4,                              \
2259           "Stride through processors when distributing processes")          \
2260                                                                             \
2261   product(uintx, CMSCoordinatorYieldSleepCount, 10,                         \
2262           "Number of times the coordinator GC thread will sleep while "     \
2263           "yielding before giving up and resuming GC")                      \
2264                                                                             \
2265   product(uintx, CMSYieldSleepCount, 0,                                     \
2266           "Number of times a GC thread (minus the coordinator) "            \
2267           "will sleep while yielding before giving up and resuming GC")     \
2268                                                                             \
2269   /* gc tracing */                                                          \
2270   manageable(bool, PrintGC, false,                                          \
2271           "Print message at garbage collection")                            \
2272                                                                             \
2273   manageable(bool, PrintGCDetails, false,                                   \
2274           "Print more details at garbage collection")                       \
2275                                                                             \
2276   manageable(bool, PrintGCDateStamps, false,                                \
2277           "Print date stamps at garbage collection")                        \
2278                                                                             \
2279   manageable(bool, PrintGCTimeStamps, false,                                \
2280           "Print timestamps at garbage collection")                         \
2281                                                                             \
2282   manageable(bool, PrintGCID, true,                                         \
2283           "Print an identifier for each garbage collection")                \
2284                                                                             \
2285   product(bool, PrintGCTaskTimeStamps, false,                               \
2286           "Print timestamps for individual gc worker thread tasks")         \
2287                                                                             \
2288   develop(intx, ConcGCYieldTimeout, 0,                                      \
2289           "If non-zero, assert that GC threads yield within this "          \
2290           "number of milliseconds")                                         \
2291                                                                             \
2292   notproduct(bool, TraceMarkSweep, false,                                   \
2293           "Trace mark sweep")                                               \
2294                                                                             \
2295   product(bool, PrintReferenceGC, false,                                    \
2296           "Print times spent handling reference objects during GC "         \
2297           "(enabled only when PrintGCDetails)")                             \
2298                                                                             \
2299   develop(bool, TraceReferenceGC, false,                                    \
2300           "Trace handling of soft/weak/final/phantom references")           \
2301                                                                             \
2302   develop(bool, TraceFinalizerRegistration, false,                          \
2303           "Trace registration of final references")                         \
2304                                                                             \
2305   notproduct(bool, TraceScavenge, false,                                    \
2306           "Trace scavenge")                                                 \
2307                                                                             \
2308   product(bool, IgnoreEmptyClassPaths, false,                               \
2309           "Ignore empty path elements in -classpath")                       \
2310                                                                             \
2311   product(bool, TraceClassPaths, false,                                     \
2312           "Trace processing of class paths")                                \
2313                                                                             \
2314   product_rw(bool, TraceClassLoading, false,                                \
2315           "Trace all classes loaded")                                       \
2316                                                                             \
2317   product(bool, TraceClassLoadingPreorder, false,                           \
2318           "Trace all classes loaded in order referenced (not loaded)")      \
2319                                                                             \
2320   product_rw(bool, TraceClassUnloading, false,                              \
2321           "Trace unloading of classes")                                     \
2322                                                                             \
2323   product_rw(bool, TraceLoaderConstraints, false,                           \
2324           "Trace loader constraints")                                       \
2325                                                                             \
2326   develop(bool, TraceClassLoaderData, false,                                \
2327           "Trace class loader loader_data lifetime")                        \
2328                                                                             \
2329   product(uintx, InitialBootClassLoaderMetaspaceSize,                       \
2330           NOT_LP64(2200*K) LP64_ONLY(4*M),                                  \
2331           "Initial size of the boot class loader data metaspace")           \
2332                                                                             \
2333   product(bool, TraceYoungGenTime, false,                                   \
2334           "Trace accumulated time for young collection")                    \
2335                                                                             \
2336   product(bool, TraceOldGenTime, false,                                     \
2337           "Trace accumulated time for old collection")                      \
2338                                                                             \
2339   product(bool, PrintTenuringDistribution, false,                           \
2340           "Print tenuring age information")                                 \
2341                                                                             \
2342   product_rw(bool, PrintHeapAtGC, false,                                    \
2343           "Print heap layout before and after each GC")                     \
2344                                                                             \
2345   product_rw(bool, PrintHeapAtGCExtended, false,                            \
2346           "Print extended information about the layout of the heap "        \
2347           "when -XX:+PrintHeapAtGC is set")                                 \
2348                                                                             \
2349   product(bool, PrintHeapAtSIGBREAK, true,                                  \
2350           "Print heap layout in response to SIGBREAK")                      \
2351                                                                             \
2352   manageable(bool, PrintClassHistogramBeforeFullGC, false,                  \
2353           "Print a class histogram before any major stop-world GC")         \
2354                                                                             \
2355   manageable(bool, PrintClassHistogramAfterFullGC, false,                   \
2356           "Print a class histogram after any major stop-world GC")          \
2357                                                                             \
2358   manageable(bool, PrintClassHistogram, false,                              \
2359           "Print a histogram of class instances")                           \
2360                                                                             \
2361   develop(bool, TraceWorkGang, false,                                       \
2362           "Trace activities of work gangs")                                 \
2363                                                                             \
2364   product(bool, TraceParallelOldGCTasks, false,                             \
2365           "Trace multithreaded GC activity")                                \
2366                                                                             \
2367   develop(bool, TraceBlockOffsetTable, false,                               \
2368           "Print BlockOffsetTable maps")                                    \
2369                                                                             \
2370   develop(bool, TraceCardTableModRefBS, false,                              \
2371           "Print CardTableModRefBS maps")                                   \
2372                                                                             \
2373   develop(bool, TraceGCTaskManager, false,                                  \
2374           "Trace actions of the GC task manager")                           \
2375                                                                             \
2376   develop(bool, TraceGCTaskQueue, false,                                    \
2377           "Trace actions of the GC task queues")                            \
2378                                                                             \
2379   diagnostic(bool, TraceGCTaskThread, false,                                \
2380           "Trace actions of the GC task threads")                           \
2381                                                                             \
2382   product(bool, PrintParallelOldGCPhaseTimes, false,                        \
2383           "Print the time taken by each phase in ParallelOldGC "            \
2384           "(PrintGCDetails must also be enabled)")                          \
2385                                                                             \
2386   develop(bool, TraceParallelOldGCMarkingPhase, false,                      \
2387           "Trace marking phase in ParallelOldGC")                           \
2388                                                                             \
2389   develop(bool, TraceParallelOldGCSummaryPhase, false,                      \
2390           "Trace summary phase in ParallelOldGC")                           \
2391                                                                             \
2392   develop(bool, TraceParallelOldGCCompactionPhase, false,                   \
2393           "Trace compaction phase in ParallelOldGC")                        \
2394                                                                             \
2395   develop(bool, TraceParallelOldGCDensePrefix, false,                       \
2396           "Trace dense prefix computation for ParallelOldGC")               \
2397                                                                             \
2398   develop(bool, IgnoreLibthreadGPFault, false,                              \
2399           "Suppress workaround for libthread GP fault")                     \
2400                                                                             \
2401   product(bool, PrintJNIGCStalls, false,                                    \
2402           "Print diagnostic message when GC is stalled "                    \
2403           "by JNI critical section")                                        \
2404                                                                             \
2405   experimental(double, ObjectCountCutOffPercent, 0.5,                       \
2406           "The percentage of the used heap that the instances of a class "  \
2407           "must occupy for the class to generate a trace event")            \
2408                                                                             \
2409   /* GC log rotation setting */                                             \
2410                                                                             \
2411   product(bool, UseGCLogFileRotation, false,                                \
2412           "Rotate gclog files (for long running applications). It requires "\
2413           "-Xloggc:<filename>")                                             \
2414                                                                             \
2415   product(uintx, NumberOfGCLogFiles, 0,                                     \
2416           "Number of gclog files in rotation "                              \
2417           "(default: 0, no rotation)")                                      \
2418                                                                             \
2419   product(uintx, GCLogFileSize, 8*K,                                        \
2420           "GC log file size, requires UseGCLogFileRotation. "               \
2421           "Set to 0 to only trigger rotation via jcmd")                     \
2422                                                                             \
2423   /* JVMTI heap profiling */                                                \
2424                                                                             \
2425   diagnostic(bool, TraceJVMTIObjectTagging, false,                          \
2426           "Trace JVMTI object tagging calls")                               \
2427                                                                             \
2428   diagnostic(bool, VerifyBeforeIteration, false,                            \
2429           "Verify memory system before JVMTI iteration")                    \
2430                                                                             \
2431   /* compiler interface */                                                  \
2432                                                                             \
2433   develop(bool, CIPrintCompilerName, false,                                 \
2434           "when CIPrint is active, print the name of the active compiler")  \
2435                                                                             \
2436   diagnostic(bool, CIPrintCompileQueue, false,                              \
2437           "display the contents of the compile queue whenever a "           \
2438           "compilation is enqueued")                                        \
2439                                                                             \
2440   develop(bool, CIPrintRequests, false,                                     \
2441           "display every request for compilation")                          \
2442                                                                             \
2443   product(bool, CITime, false,                                              \
2444           "collect timing information for compilation")                     \
2445                                                                             \
2446   develop(bool, CITimeVerbose, false,                                       \
2447           "be more verbose in compilation timings")                         \
2448                                                                             \
2449   develop(bool, CITimeEach, false,                                          \
2450           "display timing information after each successful compilation")   \
2451                                                                             \
2452   develop(bool, CICountOSR, false,                                          \
2453           "use a separate counter when assigning ids to osr compilations")  \
2454                                                                             \
2455   develop(bool, CICompileNatives, true,                                     \
2456           "compile native methods if supported by the compiler")            \
2457                                                                             \
2458   develop_pd(bool, CICompileOSR,                                            \
2459           "compile on stack replacement methods if supported by the "       \
2460           "compiler")                                                       \
2461                                                                             \
2462   develop(bool, CIPrintMethodCodes, false,                                  \
2463           "print method bytecodes of the compiled code")                    \
2464                                                                             \
2465   develop(bool, CIPrintTypeFlow, false,                                     \
2466           "print the results of ciTypeFlow analysis")                       \
2467                                                                             \
2468   develop(bool, CITraceTypeFlow, false,                                     \
2469           "detailed per-bytecode tracing of ciTypeFlow analysis")           \
2470                                                                             \
2471   develop(intx, OSROnlyBCI, -1,                                             \
2472           "OSR only at this bci.  Negative values mean exclude that bci")   \
2473                                                                             \
2474   /* compiler */                                                            \
2475                                                                             \
2476   product(intx, CICompilerCount, CI_COMPILER_COUNT,                         \
2477           "Number of compiler threads to run")                              \
2478                                                                             \
2479   product(intx, CompilationPolicyChoice, 0,                                 \
2480           "which compilation policy (0-3)")                                 \
2481                                                                             \
2482   develop(bool, UseStackBanging, true,                                      \
2483           "use stack banging for stack overflow checks (required for "      \
2484           "proper StackOverflow handling; disable only to measure cost "    \
2485           "of stackbanging)")                                               \
2486                                                                             \
2487   develop(bool, UseStrictFP, true,                                          \
2488           "use strict fp if modifier strictfp is set")                      \
2489                                                                             \
2490   develop(bool, GenerateSynchronizationCode, true,                          \
2491           "generate locking/unlocking code for synchronized methods and "   \
2492           "monitors")                                                       \
2493                                                                             \
2494   develop(bool, GenerateCompilerNullChecks, true,                           \
2495           "Generate explicit null checks for loads/stores/calls")           \
2496                                                                             \
2497   develop(bool, GenerateRangeChecks, true,                                  \
2498           "Generate range checks for array accesses")                       \
2499                                                                             \
2500   develop_pd(bool, ImplicitNullChecks,                                      \
2501           "Generate code for implicit null checks")                         \
2502                                                                             \
2503   product_pd(bool, TrapBasedNullChecks,                                     \
2504           "Generate code for null checks that uses a cmp and trap "         \
2505           "instruction raising SIGTRAP.  This is only used if an access to" \
2506           "null (+offset) will not raise a SIGSEGV, i.e.,"                  \
2507           "ImplicitNullChecks don't work (PPC64).")                         \
2508                                                                             \
2509   product(bool, PrintSafepointStatistics, false,                            \
2510           "Print statistics about safepoint synchronization")               \
2511                                                                             \
2512   product(intx, PrintSafepointStatisticsCount, 300,                         \
2513           "Total number of safepoint statistics collected "                 \
2514           "before printing them out")                                       \
2515                                                                             \
2516   product(intx, PrintSafepointStatisticsTimeout,  -1,                       \
2517           "Print safepoint statistics only when safepoint takes "           \
2518           "more than PrintSafepointSatisticsTimeout in millis")             \
2519                                                                             \
2520   product(bool, TraceSafepointCleanupTime, false,                           \
2521           "Print the break down of clean up tasks performed during "        \
2522           "safepoint")                                                      \
2523                                                                             \
2524   product(bool, Inline, true,                                               \
2525           "Enable inlining")                                                \
2526                                                                             \
2527   product(bool, ClipInlining, true,                                         \
2528           "Clip inlining if aggregate method exceeds DesiredMethodLimit")   \
2529                                                                             \
2530   develop(bool, UseCHA, true,                                               \
2531           "Enable CHA")                                                     \
2532                                                                             \
2533   product(bool, UseTypeProfile, true,                                       \
2534           "Check interpreter profile for historically monomorphic calls")   \
2535                                                                             \
2536   diagnostic(bool, PrintInlining, false,                                    \
2537           "Print inlining optimizations")                                   \
2538                                                                             \
2539   product(bool, UsePopCountInstruction, false,                              \
2540           "Use population count instruction")                               \
2541                                                                             \
2542   develop(bool, EagerInitialization, false,                                 \
2543           "Eagerly initialize classes if possible")                         \
2544                                                                             \
2545   develop(bool, TraceMethodReplacement, false,                              \
2546           "Print when methods are replaced do to recompilation")            \
2547                                                                             \
2548   develop(bool, PrintMethodFlushing, false,                                 \
2549           "Print the nmethods being flushed")                               \
2550                                                                             \
2551   diagnostic(bool, PrintMethodFlushingStatistics, false,                    \
2552           "print statistics about method flushing")                         \
2553                                                                             \
2554   diagnostic(intx, HotMethodDetectionLimit, 100000,                         \
2555           "Number of compiled code invocations after which "                \
2556           "the method is considered as hot by the flusher")                 \
2557                                                                             \
2558   diagnostic(intx, MinPassesBeforeFlush, 10,                                \
2559           "Minimum number of sweeper passes before an nmethod "             \
2560           "can be flushed")                                                 \
2561                                                                             \
2562   product(bool, UseCodeAging, true,                                         \
2563           "Insert counter to detect warm methods")                          \
2564                                                                             \
2565   diagnostic(bool, StressCodeAging, false,                                  \
2566           "Start with counters compiled in")                                \
2567                                                                             \
2568   develop(bool, UseRelocIndex, false,                                       \
2569           "Use an index to speed random access to relocations")             \
2570                                                                             \
2571   develop(bool, StressCodeBuffers, false,                                   \
2572           "Exercise code buffer expansion and other rare state changes")    \
2573                                                                             \
2574   diagnostic(bool, DebugNonSafepoints, trueInDebug,                         \
2575           "Generate extra debugging information for non-safepoints in "     \
2576           "nmethods")                                                       \
2577                                                                             \
2578   product(bool, PrintVMOptions, false,                                      \
2579           "Print flags that appeared on the command line")                  \
2580                                                                             \
2581   product(bool, IgnoreUnrecognizedVMOptions, false,                         \
2582           "Ignore unrecognized VM options")                                 \
2583                                                                             \
2584   product(bool, PrintCommandLineFlags, false,                               \
2585           "Print flags specified on command line or set by ergonomics")     \
2586                                                                             \
2587   product(bool, PrintFlagsInitial, false,                                   \
2588           "Print all VM flags before argument processing and exit VM")      \
2589                                                                             \
2590   product(bool, PrintFlagsFinal, false,                                     \
2591           "Print all VM flags after argument and ergonomic processing")     \
2592                                                                             \
2593   notproduct(bool, PrintFlagsWithComments, false,                           \
2594           "Print all VM flags with default values and descriptions and "    \
2595           "exit")                                                           \
2596                                                                             \
2597   diagnostic(bool, SerializeVMOutput, true,                                 \
2598           "Use a mutex to serialize output to tty and LogFile")             \
2599                                                                             \
2600   diagnostic(bool, DisplayVMOutput, true,                                   \
2601           "Display all VM output on the tty, independently of LogVMOutput") \
2602                                                                             \
2603   diagnostic(bool, LogVMOutput, false,                                      \
2604           "Save VM output to LogFile")                                      \
2605                                                                             \
2606   diagnostic(ccstr, LogFile, NULL,                                          \
2607           "If LogVMOutput or LogCompilation is on, save VM output to "      \
2608           "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2609                                                                             \
2610   product(ccstr, ErrorFile, NULL,                                           \
2611           "If an error occurs, save the error data to this file "           \
2612           "[default: ./hs_err_pid%p.log] (%p replaced with pid)")           \
2613                                                                             \
2614   product(bool, DisplayVMOutputToStderr, false,                             \
2615           "If DisplayVMOutput is true, display all VM output to stderr")    \
2616                                                                             \
2617   product(bool, DisplayVMOutputToStdout, false,                             \
2618           "If DisplayVMOutput is true, display all VM output to stdout")    \
2619                                                                             \
2620   product(bool, UseHeavyMonitors, false,                                    \
2621           "use heavyweight instead of lightweight Java monitors")           \
2622                                                                             \
2623   product(bool, PrintStringTableStatistics, false,                          \
2624           "print statistics about the StringTable and SymbolTable")         \
2625                                                                             \
2626   diagnostic(bool, VerifyStringTableAtExit, false,                          \
2627           "verify StringTable contents at exit")                            \
2628                                                                             \
2629   notproduct(bool, PrintSymbolTableSizeHistogram, false,                    \
2630           "print histogram of the symbol table")                            \
2631                                                                             \
2632   notproduct(bool, ExitVMOnVerifyError, false,                              \
2633           "standard exit from VM if bytecode verify error "                 \
2634           "(only in debug mode)")                                           \
2635                                                                             \
2636   notproduct(ccstr, AbortVMOnException, NULL,                               \
2637           "Call fatal if this exception is thrown.  Example: "              \
2638           "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2639                                                                             \
2640   notproduct(ccstr, AbortVMOnExceptionMessage, NULL,                        \
2641           "Call fatal if the exception pointed by AbortVMOnException "      \
2642           "has this message")                                               \
2643                                                                             \
2644   develop(bool, DebugVtables, false,                                        \
2645           "add debugging code to vtable dispatch")                          \
2646                                                                             \
2647   develop(bool, PrintVtables, false,                                        \
2648           "print vtables when printing klass")                              \
2649                                                                             \
2650   notproduct(bool, PrintVtableStats, false,                                 \
2651           "print vtables stats at end of run")                              \
2652                                                                             \
2653   develop(bool, TraceCreateZombies, false,                                  \
2654           "trace creation of zombie nmethods")                              \
2655                                                                             \
2656   notproduct(bool, IgnoreLockingAssertions, false,                          \
2657           "disable locking assertions (for speed)")                         \
2658                                                                             \
2659   product(bool, RangeCheckElimination, true,                                \
2660           "Eliminate range checks")                                         \
2661                                                                             \
2662   develop_pd(bool, UncommonNullCast,                                        \
2663           "track occurrences of null in casts; adjust compiler tactics")    \
2664                                                                             \
2665   develop(bool, TypeProfileCasts,  true,                                    \
2666           "treat casts like calls for purposes of type profiling")          \
2667                                                                             \
2668   develop(bool, DelayCompilationDuringStartup, true,                        \
2669           "Delay invoking the compiler until main application class is "    \
2670           "loaded")                                                         \
2671                                                                             \
2672   develop(bool, CompileTheWorld, false,                                     \
2673           "Compile all methods in all classes in bootstrap class path "     \
2674           "(stress test)")                                                  \
2675                                                                             \
2676   develop(bool, CompileTheWorldPreloadClasses, true,                        \
2677           "Preload all classes used by a class before start loading")       \
2678                                                                             \
2679   notproduct(intx, CompileTheWorldSafepointInterval, 100,                   \
2680           "Force a safepoint every n compiles so sweeper can keep up")      \
2681                                                                             \
2682   develop(bool, FillDelaySlots, true,                                       \
2683           "Fill delay slots (on SPARC only)")                               \
2684                                                                             \
2685   develop(bool, TimeLivenessAnalysis, false,                                \
2686           "Time computation of bytecode liveness analysis")                 \
2687                                                                             \
2688   develop(bool, TraceLivenessGen, false,                                    \
2689           "Trace the generation of liveness analysis information")          \
2690                                                                             \
2691   notproduct(bool, TraceLivenessQuery, false,                               \
2692           "Trace queries of liveness analysis information")                 \
2693                                                                             \
2694   notproduct(bool, CollectIndexSetStatistics, false,                        \
2695           "Collect information about IndexSets")                            \
2696                                                                             \
2697   develop(bool, UseLoopSafepoints, true,                                    \
2698           "Generate Safepoint nodes in every loop")                         \
2699                                                                             \
2700   develop(intx, FastAllocateSizeLimit, 128*K,                               \
2701           /* Note:  This value is zero mod 1<<13 for a cheap sparc set. */  \
2702           "Inline allocations larger than this in doublewords must go slow")\
2703                                                                             \
2704   product(bool, AggressiveOpts, false,                                      \
2705           "Enable aggressive optimizations - see arguments.cpp")            \
2706                                                                             \
2707   product_pd(uintx, TypeProfileLevel,                                       \
2708           "=XYZ, with Z: Type profiling of arguments at call; "             \
2709                      "Y: Type profiling of return value at call; "          \
2710                      "X: Type profiling of parameters to methods; "         \
2711           "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods")             \
2712                                                                             \
2713   product(intx, TypeProfileArgsLimit,     2,                                \
2714           "max number of call arguments to consider for type profiling")    \
2715                                                                             \
2716   product(intx, TypeProfileParmsLimit,    2,                                \
2717           "max number of incoming parameters to consider for type profiling"\
2718           ", -1 for all")                                                   \
2719                                                                             \
2720   /* statistics */                                                          \
2721   develop(bool, CountCompiledCalls, false,                                  \
2722           "Count method invocations")                                       \
2723                                                                             \
2724   notproduct(bool, CountRuntimeCalls, false,                                \
2725           "Count VM runtime calls")                                         \
2726                                                                             \
2727   develop(bool, CountJNICalls, false,                                       \
2728           "Count jni method invocations")                                   \
2729                                                                             \
2730   notproduct(bool, CountJVMCalls, false,                                    \
2731           "Count jvm method invocations")                                   \
2732                                                                             \
2733   notproduct(bool, CountRemovableExceptions, false,                         \
2734           "Count exceptions that could be replaced by branches due to "     \
2735           "inlining")                                                       \
2736                                                                             \
2737   notproduct(bool, ICMissHistogram, false,                                  \
2738           "Produce histogram of IC misses")                                 \
2739                                                                             \
2740   notproduct(bool, PrintClassStatistics, false,                             \
2741           "Print class statistics at end of run")                           \
2742                                                                             \
2743   notproduct(bool, PrintMethodStatistics, false,                            \
2744           "Print method statistics at end of run")                          \
2745                                                                             \
2746   /* interpreter */                                                         \
2747   develop(bool, ClearInterpreterLocals, false,                              \
2748           "Always clear local variables of interpreter activations upon "   \
2749           "entry")                                                          \
2750                                                                             \
2751   product_pd(bool, RewriteBytecodes,                                        \
2752           "Allow rewriting of bytecodes (bytecodes are not immutable)")     \
2753                                                                             \
2754   product_pd(bool, RewriteFrequentPairs,                                    \
2755           "Rewrite frequently used bytecode pairs into a single bytecode")  \
2756                                                                             \
2757   diagnostic(bool, PrintInterpreter, false,                                 \
2758           "Print the generated interpreter code")                           \
2759                                                                             \
2760   product(bool, UseInterpreter, true,                                       \
2761           "Use interpreter for non-compiled methods")                       \
2762                                                                             \
2763   develop(bool, UseFastSignatureHandlers, true,                             \
2764           "Use fast signature handlers for native calls")                   \
2765                                                                             \
2766   product(bool, UseLoopCounter, true,                                       \
2767           "Increment invocation counter on backward branch")                \
2768                                                                             \
2769   product_pd(bool, UseOnStackReplacement,                                   \
2770           "Use on stack replacement, calls runtime if invoc. counter "      \
2771           "overflows in loop")                                              \
2772                                                                             \
2773   notproduct(bool, TraceOnStackReplacement, false,                          \
2774           "Trace on stack replacement")                                     \
2775                                                                             \
2776   product_pd(bool, PreferInterpreterNativeStubs,                            \
2777           "Use always interpreter stubs for native methods invoked via "    \
2778           "interpreter")                                                    \
2779                                                                             \
2780   develop(bool, CountBytecodes, false,                                      \
2781           "Count number of bytecodes executed")                             \
2782                                                                             \
2783   develop(bool, PrintBytecodeHistogram, false,                              \
2784           "Print histogram of the executed bytecodes")                      \
2785                                                                             \
2786   develop(bool, PrintBytecodePairHistogram, false,                          \
2787           "Print histogram of the executed bytecode pairs")                 \
2788                                                                             \
2789   diagnostic(bool, PrintSignatureHandlers, false,                           \
2790           "Print code generated for native method signature handlers")      \
2791                                                                             \
2792   develop(bool, VerifyOops, false,                                          \
2793           "Do plausibility checks for oops")                                \
2794                                                                             \
2795   develop(bool, CheckUnhandledOops, false,                                  \
2796           "Check for unhandled oops in VM code")                            \
2797                                                                             \
2798   develop(bool, VerifyJNIFields, trueInDebug,                               \
2799           "Verify jfieldIDs for instance fields")                           \
2800                                                                             \
2801   notproduct(bool, VerifyJNIEnvThread, false,                               \
2802           "Verify JNIEnv.thread == Thread::current() when entering VM "     \
2803           "from JNI")                                                       \
2804                                                                             \
2805   develop(bool, VerifyFPU, false,                                           \
2806           "Verify FPU state (check for NaN's, etc.)")                       \
2807                                                                             \
2808   develop(bool, VerifyThread, false,                                        \
2809           "Watch the thread register for corruption (SPARC only)")          \
2810                                                                             \
2811   develop(bool, VerifyActivationFrameSize, false,                           \
2812           "Verify that activation frame didn't become smaller than its "    \
2813           "minimal size")                                                   \
2814                                                                             \
2815   develop(bool, TraceFrequencyInlining, false,                              \
2816           "Trace frequency based inlining")                                 \
2817                                                                             \
2818   develop_pd(bool, InlineIntrinsics,                                        \
2819           "Inline intrinsics that can be statically resolved")              \
2820                                                                             \
2821   product_pd(bool, ProfileInterpreter,                                      \
2822           "Profile at the bytecode level during interpretation")            \
2823                                                                             \
2824   develop(bool, TraceProfileInterpreter, false,                             \
2825           "Trace profiling at the bytecode level during interpretation. "   \
2826           "This outputs the profiling information collected to improve "    \
2827           "jit compilation.")                                               \
2828                                                                             \
2829   develop_pd(bool, ProfileTraps,                                            \
2830           "Profile deoptimization traps at the bytecode level")             \
2831                                                                             \
2832   product(intx, ProfileMaturityPercentage, 20,                              \
2833           "number of method invocations/branches (expressed as % of "       \
2834           "CompileThreshold) before using the method's profile")            \
2835                                                                             \
2836   diagnostic(bool, PrintMethodData, false,                                  \
2837           "Print the results of +ProfileInterpreter at end of run")         \
2838                                                                             \
2839   develop(bool, VerifyDataPointer, trueInDebug,                             \
2840           "Verify the method data pointer during interpreter profiling")    \
2841                                                                             \
2842   develop(bool, VerifyCompiledCode, false,                                  \
2843           "Include miscellaneous runtime verifications in nmethod code; "   \
2844           "default off because it disturbs nmethod size heuristics")        \
2845                                                                             \
2846   notproduct(bool, CrashGCForDumpingJavaThread, false,                      \
2847           "Manually make GC thread crash then dump java stack trace;  "     \
2848           "Test only")                                                      \
2849                                                                             \
2850   /* compilation */                                                         \
2851   product(bool, UseCompiler, true,                                          \
2852           "Use Just-In-Time compilation")                                   \
2853                                                                             \
2854   develop(bool, TraceCompilationPolicy, false,                              \
2855           "Trace compilation policy")                                       \
2856                                                                             \
2857   develop(bool, TimeCompilationPolicy, false,                               \
2858           "Time the compilation policy")                                    \
2859                                                                             \
2860   product(bool, UseCounterDecay, true,                                      \
2861           "Adjust recompilation counters")                                  \
2862                                                                             \
2863   develop(intx, CounterHalfLifeTime,    30,                                 \
2864           "Half-life time of invocation counters (in seconds)")             \
2865                                                                             \
2866   develop(intx, CounterDecayMinIntervalLength,   500,                       \
2867           "The minimum interval (in milliseconds) between invocation of "   \
2868           "CounterDecay")                                                   \
2869                                                                             \
2870   product(bool, AlwaysCompileLoopMethods, false,                            \
2871           "When using recompilation, never interpret methods "              \
2872           "containing loops")                                               \
2873                                                                             \
2874   product(bool, DontCompileHugeMethods, true,                               \
2875           "Do not compile methods > HugeMethodLimit")                       \
2876                                                                             \
2877   /* Bytecode escape analysis estimation. */                                \
2878   product(bool, EstimateArgEscape, true,                                    \
2879           "Analyze bytecodes to estimate escape state of arguments")        \
2880                                                                             \
2881   product(intx, BCEATraceLevel, 0,                                          \
2882           "How much tracing to do of bytecode escape analysis estimates")   \
2883                                                                             \
2884   product(intx, MaxBCEAEstimateLevel, 5,                                    \
2885           "Maximum number of nested calls that are analyzed by BC EA")      \
2886                                                                             \
2887   product(intx, MaxBCEAEstimateSize, 150,                                   \
2888           "Maximum bytecode size of a method to be analyzed by BC EA")      \
2889                                                                             \
2890   product(intx,  AllocatePrefetchStyle, 1,                                  \
2891           "0 = no prefetch, "                                               \
2892           "1 = prefetch instructions for each allocation, "                 \
2893           "2 = use TLAB watermark to gate allocation prefetch, "            \
2894           "3 = use BIS instruction on Sparc for allocation prefetch")       \
2895                                                                             \
2896   product(intx,  AllocatePrefetchDistance, -1,                              \
2897           "Distance to prefetch ahead of allocation pointer")               \
2898                                                                             \
2899   product(intx,  AllocatePrefetchLines, 3,                                  \
2900           "Number of lines to prefetch ahead of array allocation pointer")  \
2901                                                                             \
2902   product(intx,  AllocateInstancePrefetchLines, 1,                          \
2903           "Number of lines to prefetch ahead of instance allocation "       \
2904           "pointer")                                                        \
2905                                                                             \
2906   product(intx,  AllocatePrefetchStepSize, 16,                              \
2907           "Step size in bytes of sequential prefetch instructions")         \
2908                                                                             \
2909   product(intx,  AllocatePrefetchInstr, 0,                                  \
2910           "Prefetch instruction to prefetch ahead of allocation pointer")   \
2911                                                                             \
2912   /* deoptimization */                                                      \
2913   develop(bool, TraceDeoptimization, false,                                 \
2914           "Trace deoptimization")                                           \
2915                                                                             \
2916   develop(bool, DebugDeoptimization, false,                                 \
2917           "Tracing various information while debugging deoptimization")     \
2918                                                                             \
2919   product(intx, SelfDestructTimer, 0,                                       \
2920           "Will cause VM to terminate after a given time (in minutes) "     \
2921           "(0 means off)")                                                  \
2922                                                                             \
2923   product(intx, MaxJavaStackTraceDepth, 1024,                               \
2924           "The maximum number of lines in the stack trace for Java "        \
2925           "exceptions (0 means all)")                                       \
2926                                                                             \
2927   NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000,          \
2928           "Guarantee a safepoint (at least) every so many milliseconds "    \
2929           "(0 means none)"))                                                \
2930                                                                             \
2931   EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0,               \
2932           "Guarantee a safepoint (at least) every so many milliseconds "    \
2933           "(0 means none)"))                                                \
2934                                                                             \
2935   product(intx, SafepointTimeoutDelay, 10000,                               \
2936           "Delay in milliseconds for option SafepointTimeout")              \
2937                                                                             \
2938   product(intx, NmethodSweepActivity, 10,                                   \
2939           "Removes cold nmethods from code cache if > 0. Higher values "    \
2940           "result in more aggressive sweeping")                             \
2941                                                                             \
2942   notproduct(bool, LogSweeper, false,                                       \
2943           "Keep a ring buffer of sweeper activity")                         \
2944                                                                             \
2945   notproduct(intx, SweeperLogEntries, 1024,                                 \
2946           "Number of records in the ring buffer of sweeper activity")       \
2947                                                                             \
2948   notproduct(intx, MemProfilingInterval, 500,                               \
2949           "Time between each invocation of the MemProfiler")                \
2950                                                                             \
2951   develop(intx, MallocCatchPtr, -1,                                         \
2952           "Hit breakpoint when mallocing/freeing this pointer")             \
2953                                                                             \
2954   notproduct(ccstrlist, SuppressErrorAt, "",                                \
2955           "List of assertions (file:line) to muzzle")                       \
2956                                                                             \
2957   notproduct(uintx, HandleAllocationLimit, 1024,                            \
2958           "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2959           "is used")                                                        \
2960                                                                             \
2961   develop(uintx, TotalHandleAllocationLimit, 1024,                          \
2962           "Threshold for total handle allocation when "                     \
2963           "+TraceHandleAllocation is used")                                 \
2964                                                                             \
2965   develop(intx, StackPrintLimit, 100,                                       \
2966           "number of stack frames to print in VM-level stack dump")         \
2967                                                                             \
2968   notproduct(intx, MaxElementPrintSize, 256,                                \
2969           "maximum number of elements to print")                            \
2970                                                                             \
2971   notproduct(intx, MaxSubklassPrintSize, 4,                                 \
2972           "maximum number of subklasses to print when printing klass")      \
2973                                                                             \
2974   product(intx, MaxInlineLevel, 9,                                          \
2975           "maximum number of nested calls that are inlined")                \
2976                                                                             \
2977   product(intx, MaxRecursiveInlineLevel, 1,                                 \
2978           "maximum number of nested recursive calls that are inlined")      \
2979                                                                             \
2980   develop(intx, MaxForceInlineLevel, 100,                                   \
2981           "maximum number of nested calls that are forced for inlining "    \
2982           "(using CompilerOracle or marked w/ @ForceInline)")               \
2983                                                                             \
2984   product_pd(intx, InlineSmallCode,                                         \
2985           "Only inline already compiled methods if their code size is "     \
2986           "less than this")                                                 \
2987                                                                             \
2988   product(intx, MaxInlineSize, 35,                                          \
2989           "The maximum bytecode size of a method to be inlined")            \
2990                                                                             \
2991   product_pd(intx, FreqInlineSize,                                          \
2992           "The maximum bytecode size of a frequent method to be inlined")   \
2993                                                                             \
2994   product(intx, MaxTrivialSize, 6,                                          \
2995           "The maximum bytecode size of a trivial method to be inlined")    \
2996                                                                             \
2997   product(intx, MinInliningThreshold, 250,                                  \
2998           "The minimum invocation count a method needs to have to be "      \
2999           "inlined")                                                        \
3000                                                                             \
3001   develop(intx, MethodHistogramCutoff, 100,                                 \
3002           "The cutoff value for method invocation histogram (+CountCalls)") \
3003                                                                             \
3004   develop(intx, ProfilerNumberOfInterpretedMethods, 25,                     \
3005           "Number of interpreted methods to show in profile")               \
3006                                                                             \
3007   develop(intx, ProfilerNumberOfCompiledMethods, 25,                        \
3008           "Number of compiled methods to show in profile")                  \
3009                                                                             \
3010   develop(intx, ProfilerNumberOfStubMethods, 25,                            \
3011           "Number of stub methods to show in profile")                      \
3012                                                                             \
3013   develop(intx, ProfilerNumberOfRuntimeStubNodes, 25,                       \
3014           "Number of runtime stub nodes to show in profile")                \
3015                                                                             \
3016   product(intx, ProfileIntervalsTicks, 100,                                 \
3017           "Number of ticks between printing of interval profile "           \
3018           "(+ProfileIntervals)")                                            \
3019                                                                             \
3020   notproduct(intx, ScavengeALotInterval,     1,                             \
3021           "Interval between which scavenge will occur with +ScavengeALot")  \
3022                                                                             \
3023   notproduct(intx, FullGCALotInterval,     1,                               \
3024           "Interval between which full gc will occur with +FullGCALot")     \
3025                                                                             \
3026   notproduct(intx, FullGCALotStart,     0,                                  \
3027           "For which invocation to start FullGCAlot")                       \
3028                                                                             \
3029   notproduct(intx, FullGCALotDummies,  32*K,                                \
3030           "Dummy object allocated with +FullGCALot, forcing all objects "   \
3031           "to move")                                                        \
3032                                                                             \
3033   develop(intx, DontYieldALotInterval,    10,                               \
3034           "Interval between which yields will be dropped (milliseconds)")   \
3035                                                                             \
3036   develop(intx, MinSleepInterval,     1,                                    \
3037           "Minimum sleep() interval (milliseconds) when "                   \
3038           "ConvertSleepToYield is off (used for Solaris)")                  \
3039                                                                             \
3040   develop(intx, ProfilerPCTickThreshold,    15,                             \
3041           "Number of ticks in a PC buckets to be a hotspot")                \
3042                                                                             \
3043   notproduct(intx, DeoptimizeALotInterval,     5,                           \
3044           "Number of exits until DeoptimizeALot kicks in")                  \
3045                                                                             \
3046   notproduct(intx, ZombieALotInterval,     5,                               \
3047           "Number of exits until ZombieALot kicks in")                      \
3048                                                                             \
3049   diagnostic(intx, MallocVerifyInterval,     0,                             \
3050           "If non-zero, verify C heap after every N calls to "              \
3051           "malloc/realloc/free")                                            \
3052                                                                             \
3053   diagnostic(intx, MallocVerifyStart,     0,                                \
3054           "If non-zero, start verifying C heap after Nth call to "          \
3055           "malloc/realloc/free")                                            \
3056                                                                             \
3057   diagnostic(uintx, MallocMaxTestWords,     0,                              \
3058           "If non-zero, maximum number of words that malloc/realloc can "   \
3059           "allocate (for testing only)")                                    \
3060                                                                             \
3061   product(intx, TypeProfileWidth,     2,                                    \
3062           "Number of receiver types to record in call/cast profile")        \
3063                                                                             \
3064   develop(intx, BciProfileWidth,      2,                                    \
3065           "Number of return bci's to record in ret profile")                \
3066                                                                             \
3067   product(intx, PerMethodRecompilationCutoff, 400,                          \
3068           "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3069                                                                             \
3070   product(intx, PerBytecodeRecompilationCutoff, 200,                        \
3071           "Per-BCI limit on repeated recompilation (-1=>'Inf')")            \
3072                                                                             \
3073   product(intx, PerMethodTrapLimit,  100,                                   \
3074           "Limit on traps (of one kind) in a method (includes inlines)")    \
3075                                                                             \
3076   experimental(intx, PerMethodSpecTrapLimit,  5000,                         \
3077           "Limit on speculative traps (of one kind) in a method (includes inlines)") \
3078                                                                             \
3079   product(intx, PerBytecodeTrapLimit,  4,                                   \
3080           "Limit on traps (of one kind) at a particular BCI")               \
3081                                                                             \
3082   experimental(intx, SpecTrapLimitExtraEntries,  3,                         \
3083           "Extra method data trap entries for speculation")                 \
3084                                                                             \
3085   develop(intx, InlineFrequencyRatio,    20,                                \
3086           "Ratio of call site execution to caller method invocation")       \
3087                                                                             \
3088   develop_pd(intx, InlineFrequencyCount,                                    \
3089           "Count of call site execution necessary to trigger frequent "     \
3090           "inlining")                                                       \
3091                                                                             \
3092   develop(intx, InlineThrowCount,    50,                                    \
3093           "Force inlining of interpreted methods that throw this often")    \
3094                                                                             \
3095   develop(intx, InlineThrowMaxSize,   200,                                  \
3096           "Force inlining of throwing methods smaller than this")           \
3097                                                                             \
3098   develop(intx, ProfilerNodeSize,  1024,                                    \
3099           "Size in K to allocate for the Profile Nodes of each thread")     \
3100                                                                             \
3101   product_pd(intx, PreInflateSpin,                                          \
3102           "Number of times to spin wait before inflation")                  \
3103                                                                             \
3104   /* gc parameters */                                                       \
3105   product(uintx, InitialHeapSize, 0,                                        \
3106           "Initial heap size (in bytes); zero means use ergonomics")        \
3107                                                                             \
3108   product(uintx, MaxHeapSize, ScaleForWordSize(96*M),                       \
3109           "Maximum heap size (in bytes)")                                   \
3110                                                                             \
3111   product(uintx, OldSize, ScaleForWordSize(4*M),                            \
3112           "Initial tenured generation size (in bytes)")                     \
3113                                                                             \
3114   product(uintx, NewSize, ScaleForWordSize(1*M),                            \
3115           "Initial new generation size (in bytes)")                         \
3116                                                                             \
3117   product(uintx, MaxNewSize, max_uintx,                                     \
3118           "Maximum new generation size (in bytes), max_uintx means set "    \
3119           "ergonomically")                                                  \
3120                                                                             \
3121   product(uintx, PretenureSizeThreshold, 0,                                 \
3122           "Maximum size in bytes of objects allocated in DefNew "           \
3123           "generation; zero means no maximum")                              \
3124                                                                             \
3125   product(uintx, TLABSize, 0,                                               \
3126           "Starting TLAB size (in bytes); zero means set ergonomically")    \
3127                                                                             \
3128   product(uintx, MinTLABSize, 2*K,                                          \
3129           "Minimum allowed TLAB size (in bytes)")                           \
3130                                                                             \
3131   product(uintx, TLABAllocationWeight, 35,                                  \
3132           "Allocation averaging weight")                                    \
3133                                                                             \
3134   product(uintx, TLABWasteTargetPercent, 1,                                 \
3135           "Percentage of Eden that can be wasted")                          \
3136                                                                             \
3137   product(uintx, TLABRefillWasteFraction,    64,                            \
3138           "Maximum TLAB waste at a refill (internal fragmentation)")        \
3139                                                                             \
3140   product(uintx, TLABWasteIncrement,    4,                                  \
3141           "Increment allowed waste at slow allocation")                     \
3142                                                                             \
3143   product(uintx, SurvivorRatio, 8,                                          \
3144           "Ratio of eden/survivor space size")                              \
3145                                                                             \
3146   product(uintx, NewRatio, 2,                                               \
3147           "Ratio of old/new generation sizes")                              \
3148                                                                             \
3149   product_pd(uintx, NewSizeThreadIncrease,                                  \
3150           "Additional size added to desired new generation size per "       \
3151           "non-daemon thread (in bytes)")                                   \
3152                                                                             \
3153   product_pd(uintx, MetaspaceSize,                                          \
3154           "Initial size of Metaspaces (in bytes)")                          \
3155                                                                             \
3156   product(uintx, MaxMetaspaceSize, max_uintx,                               \
3157           "Maximum size of Metaspaces (in bytes)")                          \
3158                                                                             \
3159   product(uintx, CompressedClassSpaceSize, 1*G,                             \
3160           "Maximum size of class area in Metaspace when compressed "        \
3161           "class pointers are used")                                        \
3162                                                                             \
3163   manageable(uintx, MinHeapFreeRatio, 40,                                   \
3164           "The minimum percentage of heap free after GC to avoid expansion."\
3165           " For most GCs this applies to the old generation. In G1 and"     \
3166           " ParallelGC it applies to the whole heap.")                      \
3167                                                                             \
3168   manageable(uintx, MaxHeapFreeRatio, 70,                                   \
3169           "The maximum percentage of heap free after GC to avoid shrinking."\
3170           " For most GCs this applies to the old generation. In G1 and"     \
3171           " ParallelGC it applies to the whole heap.")                      \
3172                                                                             \
3173   product(intx, SoftRefLRUPolicyMSPerMB, 1000,                              \
3174           "Number of milliseconds per MB of free space in the heap")        \
3175                                                                             \
3176   product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K),                \
3177           "The minimum change in heap space due to GC (in bytes)")          \
3178                                                                             \
3179   product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K),            \
3180           "The minimum expansion of Metaspace (in bytes)")                  \
3181                                                                             \
3182   product(uintx, MinMetaspaceFreeRatio,    40,                              \
3183           "The minimum percentage of Metaspace free after GC to avoid "     \
3184           "expansion")                                                      \
3185                                                                             \
3186   product(uintx, MaxMetaspaceFreeRatio,    70,                              \
3187           "The maximum percentage of Metaspace free after GC to avoid "     \
3188           "shrinking")                                                      \
3189                                                                             \
3190   product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M),              \
3191           "The maximum expansion of Metaspace without full GC (in bytes)")  \
3192                                                                             \
3193   product(uintx, QueuedAllocationWarningCount, 0,                           \
3194           "Number of times an allocation that queues behind a GC "          \
3195           "will retry before printing a warning")                           \
3196                                                                             \
3197   diagnostic(uintx, VerifyGCStartAt,   0,                                   \
3198           "GC invoke count where +VerifyBefore/AfterGC kicks in")           \
3199                                                                             \
3200   diagnostic(intx, VerifyGCLevel,     0,                                    \
3201           "Generation level at which to start +VerifyBefore/AfterGC")       \
3202                                                                             \
3203   product(uintx, MaxTenuringThreshold,    15,                               \
3204           "Maximum value for tenuring threshold")                           \
3205                                                                             \
3206   product(uintx, InitialTenuringThreshold,    7,                            \
3207           "Initial value for tenuring threshold")                           \
3208                                                                             \
3209   product(uintx, TargetSurvivorRatio,    50,                                \
3210           "Desired percentage of survivor space used after scavenge")       \
3211                                                                             \
3212   product(uintx, MarkSweepDeadRatio,     5,                                 \
3213           "Percentage (0-100) of the old gen allowed as dead wood. "        \
3214           "Serial mark sweep treats this as both the minimum and maximum "  \
3215           "value. "                                                         \
3216           "CMS uses this value only if it falls back to mark sweep. "       \
3217           "Par compact uses a variable scale based on the density of the "  \
3218           "generation and treats this as the maximum value when the heap "  \
3219           "is either completely full or completely empty.  Par compact "    \
3220           "also has a smaller default value; see arguments.cpp.")           \
3221                                                                             \
3222   product(uintx, MarkSweepAlwaysCompactCount,     4,                        \
3223           "How often should we fully compact the heap (ignoring the dead "  \
3224           "space parameters)")                                              \
3225                                                                             \
3226   product(intx, PrintCMSStatistics, 0,                                      \
3227           "Statistics for CMS")                                             \
3228                                                                             \
3229   product(bool, PrintCMSInitiationStatistics, false,                        \
3230           "Statistics for initiating a CMS collection")                     \
3231                                                                             \
3232   product(intx, PrintFLSStatistics, 0,                                      \
3233           "Statistics for CMS' FreeListSpace")                              \
3234                                                                             \
3235   product(intx, PrintFLSCensus, 0,                                          \
3236           "Census for CMS' FreeListSpace")                                  \
3237                                                                             \
3238   develop(uintx, GCExpandToAllocateDelayMillis, 0,                          \
3239           "Delay between expansion and allocation (in milliseconds)")       \
3240                                                                             \
3241   develop(uintx, GCWorkerDelayMillis, 0,                                    \
3242           "Delay in scheduling GC workers (in milliseconds)")               \
3243                                                                             \
3244   product(intx, DeferThrSuspendLoopCount,     4000,                         \
3245           "(Unstable) Number of times to iterate in safepoint loop "        \
3246           "before blocking VM threads ")                                    \
3247                                                                             \
3248   product(intx, DeferPollingPageLoopCount,     -1,                          \
3249           "(Unsafe,Unstable) Number of iterations in safepoint loop "       \
3250           "before changing safepoint polling page to RO ")                  \
3251                                                                             \
3252   product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)")               \
3253                                                                             \
3254   product(bool, PSChunkLargeArrays, true,                                   \
3255           "Process large arrays in chunks")                                 \
3256                                                                             \
3257   product(uintx, GCDrainStackTargetSize, 64,                                \
3258           "Number of entries we will try to leave on the stack "            \
3259           "during parallel gc")                                             \
3260                                                                             \
3261   /* stack parameters */                                                    \
3262   product_pd(intx, StackYellowPages,                                        \
3263           "Number of yellow zone (recoverable overflows) pages")            \
3264                                                                             \
3265   product_pd(intx, StackRedPages,                                           \
3266           "Number of red zone (unrecoverable overflows) pages")             \
3267                                                                             \
3268   product_pd(intx, StackShadowPages,                                        \
3269           "Number of shadow zone (for overflow checking) pages "            \
3270           "this should exceed the depth of the VM and native call stack")   \
3271                                                                             \
3272   product_pd(intx, ThreadStackSize,                                         \
3273           "Thread Stack Size (in Kbytes)")                                  \
3274                                                                             \
3275   product_pd(intx, VMThreadStackSize,                                       \
3276           "Non-Java Thread Stack Size (in Kbytes)")                         \
3277                                                                             \
3278   product_pd(intx, CompilerThreadStackSize,                                 \
3279           "Compiler Thread Stack Size (in Kbytes)")                         \
3280                                                                             \
3281   develop_pd(uintx, JVMInvokeMethodSlack,                                   \
3282           "Stack space (bytes) required for JVM_InvokeMethod to complete")  \
3283                                                                             \
3284   product(uintx, ThreadSafetyMargin, 50*M,                                  \
3285           "Thread safety margin is used on fixed-stack LinuxThreads (on "   \
3286           "Linux/x86 only) to prevent heap-stack collision. Set to 0 to "   \
3287           "disable this feature")                                           \
3288                                                                             \
3289   /* code cache parameters */                                               \
3290   /* ppc64/tiered compilation has large code-entry alignment. */            \
3291   develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)),\
3292           "Code cache segment size (in bytes) - smallest unit of "          \
3293           "allocation")                                                     \
3294                                                                             \
3295   develop_pd(intx, CodeEntryAlignment,                                      \
3296           "Code entry alignment for generated code (in bytes)")             \
3297                                                                             \
3298   product_pd(intx, OptoLoopAlignment,                                       \
3299           "Align inner loops to zero relative to this modulus")             \
3300                                                                             \
3301   product_pd(uintx, InitialCodeCacheSize,                                   \
3302           "Initial code cache size (in bytes)")                             \
3303                                                                             \
3304   develop_pd(uintx, CodeCacheMinimumUseSpace,                               \
3305           "Minimum code cache size (in bytes) required to start VM.")       \
3306                                                                             \
3307   product(bool, SegmentedCodeCache, false,                                  \
3308           "Use a segmented code cache")                                     \
3309                                                                             \
3310   product_pd(uintx, ReservedCodeCacheSize,                                  \
3311           "Reserved code cache size (in bytes) - maximum code cache size")  \
3312                                                                             \
3313   product_pd(uintx, NonProfiledCodeHeapSize,                                \
3314           "Size of code heap with non-profiled methods (in bytes)")         \
3315                                                                             \
3316   product_pd(uintx, ProfiledCodeHeapSize,                                   \
3317           "Size of code heap with profiled methods (in bytes)")             \
3318                                                                             \
3319   product_pd(uintx, NonNMethodCodeHeapSize,                                 \
3320           "Size of code heap with non-nmethods (in bytes)")                 \
3321                                                                             \
3322   product_pd(uintx, CodeCacheExpansionSize,                                 \
3323           "Code cache expansion size (in bytes)")                           \
3324                                                                             \
3325   develop_pd(uintx, CodeCacheMinBlockLength,                                \
3326           "Minimum number of segments in a code cache block")               \
3327                                                                             \
3328   notproduct(bool, ExitOnFullCodeCache, false,                              \
3329           "Exit the VM if we fill the code cache")                          \
3330                                                                             \
3331   product(bool, UseCodeCacheFlushing, true,                                 \
3332           "Remove cold/old nmethods from the code cache")                   \
3333                                                                             \
3334   product(uintx, StartAggressiveSweepingAt, 10,                             \
3335           "Start aggressive sweeping if X[%] of the code cache is free."    \
3336           "Segmented code cache: X[%] of the non-profiled heap."            \
3337           "Non-segmented code cache: X[%] of the total code cache")         \
3338                                                                             \
3339   /* interpreter debugging */                                               \
3340   develop(intx, BinarySwitchThreshold, 5,                                   \
3341           "Minimal number of lookupswitch entries for rewriting to binary " \
3342           "switch")                                                         \
3343                                                                             \
3344   develop(intx, StopInterpreterAt, 0,                                       \
3345           "Stop interpreter execution at specified bytecode number")        \
3346                                                                             \
3347   develop(intx, TraceBytecodesAt, 0,                                        \
3348           "Trace bytecodes starting with specified bytecode number")        \
3349                                                                             \
3350   /* compiler interface */                                                  \
3351   develop(intx, CIStart, 0,                                                 \
3352           "The id of the first compilation to permit")                      \
3353                                                                             \
3354   develop(intx, CIStop, max_jint,                                           \
3355           "The id of the last compilation to permit")                       \
3356                                                                             \
3357   develop(intx, CIStartOSR, 0,                                              \
3358           "The id of the first osr compilation to permit "                  \
3359           "(CICountOSR must be on)")                                        \
3360                                                                             \
3361   develop(intx, CIStopOSR, max_jint,                                        \
3362           "The id of the last osr compilation to permit "                   \
3363           "(CICountOSR must be on)")                                        \
3364                                                                             \
3365   develop(intx, CIBreakAtOSR, -1,                                           \
3366           "The id of osr compilation to break at")                          \
3367                                                                             \
3368   develop(intx, CIBreakAt, -1,                                              \
3369           "The id of compilation to break at")                              \
3370                                                                             \
3371   product(ccstrlist, CompileOnly, "",                                       \
3372           "List of methods (pkg/class.name) to restrict compilation to")    \
3373                                                                             \
3374   product(ccstr, CompileCommandFile, NULL,                                  \
3375           "Read compiler commands from this file [.hotspot_compiler]")      \
3376                                                                             \
3377   product(ccstrlist, CompileCommand, "",                                    \
3378           "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3379                                                                             \
3380   develop(bool, ReplayCompiles, false,                                      \
3381           "Enable replay of compilations from ReplayDataFile")              \
3382                                                                             \
3383   product(ccstr, ReplayDataFile, NULL,                                      \
3384           "File containing compilation replay information"                  \
3385           "[default: ./replay_pid%p.log] (%p replaced with pid)")           \
3386                                                                             \
3387    product(ccstr, InlineDataFile, NULL,                                     \
3388           "File containing inlining replay information"                     \
3389           "[default: ./inline_pid%p.log] (%p replaced with pid)")           \
3390                                                                             \
3391   develop(intx, ReplaySuppressInitializers, 2,                              \
3392           "Control handling of class initialization during replay: "        \
3393           "0 - don't do anything special; "                                 \
3394           "1 - treat all class initializers as empty; "                     \
3395           "2 - treat class initializers for application classes as empty; " \
3396           "3 - allow all class initializers to run during bootstrap but "   \
3397           "    pretend they are empty after starting replay")               \
3398                                                                             \
3399   develop(bool, ReplayIgnoreInitErrors, false,                              \
3400           "Ignore exceptions thrown during initialization for replay")      \
3401                                                                             \
3402   product(bool, DumpReplayDataOnError, true,                                \
3403           "Record replay data for crashing compiler threads")               \
3404                                                                             \
3405   product(bool, CICompilerCountPerCPU, false,                               \
3406           "1 compiler thread for log(N CPUs)")                              \
3407                                                                             \
3408   develop(intx, CIFireOOMAt,    -1,                                         \
3409           "Fire OutOfMemoryErrors throughout CI for testing the compiler "  \
3410           "(non-negative value throws OOM after this many CI accesses "     \
3411           "in each compile)")                                               \
3412   notproduct(intx, CICrashAt, -1,                                           \
3413           "id of compilation to trigger assert in compiler thread for "     \
3414           "the purpose of testing, e.g. generation of replay data")         \
3415   notproduct(bool, CIObjectFactoryVerify, false,                            \
3416           "enable potentially expensive verification in ciObjectFactory")   \
3417                                                                             \
3418   /* Priorities */                                                          \
3419   product_pd(bool, UseThreadPriorities,  "Use native thread priorities")    \
3420                                                                             \
3421   product(intx, ThreadPriorityPolicy, 0,                                    \
3422           "0 : Normal.                                                     "\
3423           "    VM chooses priorities that are appropriate for normal       "\
3424           "    applications. On Solaris NORM_PRIORITY and above are mapped "\
3425           "    to normal native priority. Java priorities below "           \
3426           "    NORM_PRIORITY map to lower native priority values. On       "\
3427           "    Windows applications are allowed to use higher native       "\
3428           "    priorities. However, with ThreadPriorityPolicy=0, VM will   "\
3429           "    not use the highest possible native priority,               "\
3430           "    THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with     "\
3431           "    system threads. On Linux thread priorities are ignored      "\
3432           "    because the OS does not support static priority in          "\
3433           "    SCHED_OTHER scheduling class which is the only choice for   "\
3434           "    non-root, non-realtime applications.                        "\
3435           "1 : Aggressive.                                                 "\
3436           "    Java thread priorities map over to the entire range of      "\
3437           "    native thread priorities. Higher Java thread priorities map "\
3438           "    to higher native thread priorities. This policy should be   "\
3439           "    used with care, as sometimes it can cause performance       "\
3440           "    degradation in the application and/or the entire system. On "\
3441           "    Linux this policy requires root privilege.")                 \
3442                                                                             \
3443   product(bool, ThreadPriorityVerbose, false,                               \
3444           "Print priority changes")                                         \
3445                                                                             \
3446   product(intx, DefaultThreadPriority, -1,                                  \
3447           "The native priority at which threads run if not elsewhere "      \
3448           "specified (-1 means no change)")                                 \
3449                                                                             \
3450   product(intx, CompilerThreadPriority, -1,                                 \
3451           "The native priority at which compiler threads should run "       \
3452           "(-1 means no change)")                                           \
3453                                                                             \
3454   product(intx, VMThreadPriority, -1,                                       \
3455           "The native priority at which the VM thread should run "          \
3456           "(-1 means no change)")                                           \
3457                                                                             \
3458   product(bool, CompilerThreadHintNoPreempt, true,                          \
3459           "(Solaris only) Give compiler threads an extra quanta")           \
3460                                                                             \
3461   product(bool, VMThreadHintNoPreempt, false,                               \
3462           "(Solaris only) Give VM thread an extra quanta")                  \
3463                                                                             \
3464   product(intx, JavaPriority1_To_OSPriority, -1,                            \
3465           "Map Java priorities to OS priorities")                           \
3466                                                                             \
3467   product(intx, JavaPriority2_To_OSPriority, -1,                            \
3468           "Map Java priorities to OS priorities")                           \
3469                                                                             \
3470   product(intx, JavaPriority3_To_OSPriority, -1,                            \
3471           "Map Java priorities to OS priorities")                           \
3472                                                                             \
3473   product(intx, JavaPriority4_To_OSPriority, -1,                            \
3474           "Map Java priorities to OS priorities")                           \
3475                                                                             \
3476   product(intx, JavaPriority5_To_OSPriority, -1,                            \
3477           "Map Java priorities to OS priorities")                           \
3478                                                                             \
3479   product(intx, JavaPriority6_To_OSPriority, -1,                            \
3480           "Map Java priorities to OS priorities")                           \
3481                                                                             \
3482   product(intx, JavaPriority7_To_OSPriority, -1,                            \
3483           "Map Java priorities to OS priorities")                           \
3484                                                                             \
3485   product(intx, JavaPriority8_To_OSPriority, -1,                            \
3486           "Map Java priorities to OS priorities")                           \
3487                                                                             \
3488   product(intx, JavaPriority9_To_OSPriority, -1,                            \
3489           "Map Java priorities to OS priorities")                           \
3490                                                                             \
3491   product(intx, JavaPriority10_To_OSPriority,-1,                            \
3492           "Map Java priorities to OS priorities")                           \
3493                                                                             \
3494   experimental(bool, UseCriticalJavaThreadPriority, false,                  \
3495           "Java thread priority 10 maps to critical scheduling priority")   \
3496                                                                             \
3497   experimental(bool, UseCriticalCompilerThreadPriority, false,              \
3498           "Compiler thread(s) run at critical scheduling priority")         \
3499                                                                             \
3500   experimental(bool, UseCriticalCMSThreadPriority, false,                   \
3501           "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3502                                                                             \
3503   /* compiler debugging */                                                  \
3504   notproduct(intx, CompileTheWorldStartAt,     1,                           \
3505           "First class to consider when using +CompileTheWorld")            \
3506                                                                             \
3507   notproduct(intx, CompileTheWorldStopAt, max_jint,                         \
3508           "Last class to consider when using +CompileTheWorld")             \
3509                                                                             \
3510   develop(intx, NewCodeParameter,      0,                                   \
3511           "Testing Only: Create a dedicated integer parameter before "      \
3512           "putback")                                                        \
3513                                                                             \
3514   /* new oopmap storage allocation */                                       \
3515   develop(intx, MinOopMapAllocation,     8,                                 \
3516           "Minimum number of OopMap entries in an OopMapSet")               \
3517                                                                             \
3518   /* Background Compilation */                                              \
3519   develop(intx, LongCompileThreshold,     50,                               \
3520           "Used with +TraceLongCompiles")                                   \
3521                                                                             \
3522   product(intx, StarvationMonitorInterval,    200,                          \
3523           "Pause between each check (in milliseconds)")                     \
3524                                                                             \
3525   /* recompilation */                                                       \
3526   product_pd(intx, CompileThreshold,                                        \
3527           "number of interpreted method invocations before (re-)compiling") \
3528                                                                             \
3529   product(double, CompileThresholdScaling, 1.0,                             \
3530           "Factor to control when first compilation happens "               \
3531           "(both with and without tiered compilation): "                    \
3532           "values greater than 1.0 delay counter overflow, "                \
3533           "values between 0 and 1.0 rush counter overflow, "                \
3534           "value of 1.0 leave compilation thresholds unchanged "            \
3535           "value of 0.0 is equivalent to -Xint. "                           \
3536           ""                                                                \
3537           "Flag can be set as per-method option. "                          \
3538           "If a value is specified for a method, compilation thresholds "   \
3539           "for that method are scaled by both the value of the global flag "\
3540           "and the value of the per-method flag.")                          \
3541                                                                             \
3542   product(intx, Tier0InvokeNotifyFreqLog, 7,                                \
3543           "Interpreter (tier 0) invocation notification frequency")         \
3544                                                                             \
3545   product(intx, Tier2InvokeNotifyFreqLog, 11,                               \
3546           "C1 without MDO (tier 2) invocation notification frequency")      \
3547                                                                             \
3548   product(intx, Tier3InvokeNotifyFreqLog, 10,                               \
3549           "C1 with MDO profiling (tier 3) invocation notification "         \
3550           "frequency")                                                      \
3551                                                                             \
3552   product(intx, Tier23InlineeNotifyFreqLog, 20,                             \
3553           "Inlinee invocation (tiers 2 and 3) notification frequency")      \
3554                                                                             \
3555   product(intx, Tier0BackedgeNotifyFreqLog, 10,                             \
3556           "Interpreter (tier 0) invocation notification frequency")         \
3557                                                                             \
3558   product(intx, Tier2BackedgeNotifyFreqLog, 14,                             \
3559           "C1 without MDO (tier 2) invocation notification frequency")      \
3560                                                                             \
3561   product(intx, Tier3BackedgeNotifyFreqLog, 13,                             \
3562           "C1 with MDO profiling (tier 3) invocation notification "         \
3563           "frequency")                                                      \
3564                                                                             \
3565   product(intx, Tier2CompileThreshold, 0,                                   \
3566           "threshold at which tier 2 compilation is invoked")               \
3567                                                                             \
3568   product(intx, Tier2BackEdgeThreshold, 0,                                  \
3569           "Back edge threshold at which tier 2 compilation is invoked")     \
3570                                                                             \
3571   product(intx, Tier3InvocationThreshold, 200,                              \
3572           "Compile if number of method invocations crosses this "           \
3573           "threshold")                                                      \
3574                                                                             \
3575   product(intx, Tier3MinInvocationThreshold, 100,                           \
3576           "Minimum invocation to compile at tier 3")                        \
3577                                                                             \
3578   product(intx, Tier3CompileThreshold, 2000,                                \
3579           "Threshold at which tier 3 compilation is invoked (invocation "   \
3580           "minimum must be satisfied")                                      \
3581                                                                             \
3582   product(intx, Tier3BackEdgeThreshold,  60000,                             \
3583           "Back edge threshold at which tier 3 OSR compilation is invoked") \
3584                                                                             \
3585   product(intx, Tier4InvocationThreshold, 5000,                             \
3586           "Compile if number of method invocations crosses this "           \
3587           "threshold")                                                      \
3588                                                                             \
3589   product(intx, Tier4MinInvocationThreshold, 600,                           \
3590           "Minimum invocation to compile at tier 4")                        \
3591                                                                             \
3592   product(intx, Tier4CompileThreshold, 15000,                               \
3593           "Threshold at which tier 4 compilation is invoked (invocation "   \
3594           "minimum must be satisfied")                                      \
3595                                                                             \
3596   product(intx, Tier4BackEdgeThreshold, 40000,                              \
3597           "Back edge threshold at which tier 4 OSR compilation is invoked") \
3598                                                                             \
3599   product(intx, Tier3DelayOn, 5,                                            \
3600           "If C2 queue size grows over this amount per compiler thread "    \
3601           "stop compiling at tier 3 and start compiling at tier 2")         \
3602                                                                             \
3603   product(intx, Tier3DelayOff, 2,                                           \
3604           "If C2 queue size is less than this amount per compiler thread "  \
3605           "allow methods compiled at tier 2 transition to tier 3")          \
3606                                                                             \
3607   product(intx, Tier3LoadFeedback, 5,                                       \
3608           "Tier 3 thresholds will increase twofold when C1 queue size "     \
3609           "reaches this amount per compiler thread")                        \
3610                                                                             \
3611   product(intx, Tier4LoadFeedback, 3,                                       \
3612           "Tier 4 thresholds will increase twofold when C2 queue size "     \
3613           "reaches this amount per compiler thread")                        \
3614                                                                             \
3615   product(intx, TieredCompileTaskTimeout, 50,                               \
3616           "Kill compile task if method was not used within "                \
3617           "given timeout in milliseconds")                                  \
3618                                                                             \
3619   product(intx, TieredStopAtLevel, 4,                                       \
3620           "Stop at given compilation level")                                \
3621                                                                             \
3622   product(intx, Tier0ProfilingStartPercentage, 200,                         \
3623           "Start profiling in interpreter if the counters exceed tier 3 "   \
3624           "thresholds by the specified percentage")                         \
3625                                                                             \
3626   product(uintx, IncreaseFirstTierCompileThresholdAt, 50,                   \
3627           "Increase the compile threshold for C1 compilation if the code "  \
3628           "cache is filled by the specified percentage")                    \
3629                                                                             \
3630   product(intx, TieredRateUpdateMinTime, 1,                                 \
3631           "Minimum rate sampling interval (in milliseconds)")               \
3632                                                                             \
3633   product(intx, TieredRateUpdateMaxTime, 25,                                \
3634           "Maximum rate sampling interval (in milliseconds)")               \
3635                                                                             \
3636   product_pd(bool, TieredCompilation,                                       \
3637           "Enable tiered compilation")                                      \
3638                                                                             \
3639   product(bool, PrintTieredEvents, false,                                   \
3640           "Print tiered events notifications")                              \
3641                                                                             \
3642   product_pd(intx, OnStackReplacePercentage,                                \
3643           "NON_TIERED number of method invocations/branches (expressed as " \
3644           "% of CompileThreshold) before (re-)compiling OSR code")          \
3645                                                                             \
3646   product(intx, InterpreterProfilePercentage, 33,                           \
3647           "NON_TIERED number of method invocations/branches (expressed as " \
3648           "% of CompileThreshold) before profiling in the interpreter")     \
3649                                                                             \
3650   develop(intx, MaxRecompilationSearchLength,    10,                        \
3651           "The maximum number of frames to inspect when searching for "     \
3652           "recompilee")                                                     \
3653                                                                             \
3654   develop(intx, MaxInterpretedSearchLength,     3,                          \
3655           "The maximum number of interpreted frames to skip when searching "\
3656           "for recompilee")                                                 \
3657                                                                             \
3658   develop(intx, DesiredMethodLimit,  8000,                                  \
3659           "The desired maximum method size (in bytecodes) after inlining")  \
3660                                                                             \
3661   develop(intx, HugeMethodLimit,  8000,                                     \
3662           "Don't compile methods larger than this if "                      \
3663           "+DontCompileHugeMethods")                                        \
3664                                                                             \
3665   /* New JDK 1.4 reflection implementation */                               \
3666                                                                             \
3667   develop(intx, FastSuperclassLimit, 8,                                     \
3668           "Depth of hardwired instanceof accelerator array")                \
3669                                                                             \
3670   /* Properties for Java libraries  */                                      \
3671                                                                             \
3672   product(uintx, MaxDirectMemorySize, 0,                                    \
3673           "Maximum total size of NIO direct-buffer allocations")            \
3674                                                                             \
3675   /* Flags used for temporary code during development  */                   \
3676                                                                             \
3677   diagnostic(bool, UseNewCode, false,                                       \
3678           "Testing Only: Use the new version while testing")                \
3679                                                                             \
3680   diagnostic(bool, UseNewCode2, false,                                      \
3681           "Testing Only: Use the new version while testing")                \
3682                                                                             \
3683   diagnostic(bool, UseNewCode3, false,                                      \
3684           "Testing Only: Use the new version while testing")                \
3685                                                                             \
3686   /* flags for performance data collection */                               \
3687                                                                             \
3688   product(bool, UsePerfData, falseInEmbedded,                               \
3689           "Flag to disable jvmstat instrumentation for performance testing "\
3690           "and problem isolation purposes")                                 \
3691                                                                             \
3692   product(bool, PerfDataSaveToFile, false,                                  \
3693           "Save PerfData memory to hsperfdata_<pid> file on exit")          \
3694                                                                             \
3695   product(ccstr, PerfDataSaveFile, NULL,                                    \
3696           "Save PerfData memory to the specified absolute pathname. "       \
3697           "The string %p in the file name (if present) "                    \
3698           "will be replaced by pid")                                        \
3699                                                                             \
3700   product(intx, PerfDataSamplingInterval, 50,                               \
3701           "Data sampling interval (in milliseconds)")                       \
3702                                                                             \
3703   develop(bool, PerfTraceDataCreation, false,                               \
3704           "Trace creation of Performance Data Entries")                     \
3705                                                                             \
3706   develop(bool, PerfTraceMemOps, false,                                     \
3707           "Trace PerfMemory create/attach/detach calls")                    \
3708                                                                             \
3709   product(bool, PerfDisableSharedMem, false,                                \
3710           "Store performance data in standard memory")                      \
3711                                                                             \
3712   product(intx, PerfDataMemorySize, 32*K,                                   \
3713           "Size of performance data memory region. Will be rounded "        \
3714           "up to a multiple of the native os page size.")                   \
3715                                                                             \
3716   product(intx, PerfMaxStringConstLength, 1024,                             \
3717           "Maximum PerfStringConstant string length before truncation")     \
3718                                                                             \
3719   product(bool, PerfAllowAtExitRegistration, false,                         \
3720           "Allow registration of atexit() methods")                         \
3721                                                                             \
3722   product(bool, PerfBypassFileSystemCheck, false,                           \
3723           "Bypass Win32 file system criteria checks (Windows Only)")        \
3724                                                                             \
3725   product(intx, UnguardOnExecutionViolation, 0,                             \
3726           "Unguard page and retry on no-execute fault (Win32 only) "        \
3727           "0=off, 1=conservative, 2=aggressive")                            \
3728                                                                             \
3729   /* Serviceability Support */                                              \
3730                                                                             \
3731   product(bool, ManagementServer, false,                                    \
3732           "Create JMX Management Server")                                   \
3733                                                                             \
3734   product(bool, DisableAttachMechanism, false,                              \
3735           "Disable mechanism that allows tools to attach to this VM")       \
3736                                                                             \
3737   product(bool, StartAttachListener, false,                                 \
3738           "Always start Attach Listener at VM startup")                     \
3739                                                                             \
3740   manageable(bool, PrintConcurrentLocks, false,                             \
3741           "Print java.util.concurrent locks in thread dump")                \
3742                                                                             \
3743   product(bool, TransmitErrorReport, false,                                 \
3744           "Enable error report transmission on erroneous termination")      \
3745                                                                             \
3746   product(ccstr, ErrorReportServer, NULL,                                   \
3747           "Override built-in error report server address")                  \
3748                                                                             \
3749   /* Shared spaces */                                                       \
3750                                                                             \
3751   product(bool, UseSharedSpaces, true,                                      \
3752           "Use shared spaces for metadata")                                 \
3753                                                                             \
3754   product(bool, VerifySharedSpaces, false,                                  \
3755           "Verify shared spaces (false for default archive, true for "      \
3756           "archive specified by -XX:SharedArchiveFile)")                    \
3757                                                                             \
3758   product(bool, RequireSharedSpaces, false,                                 \
3759           "Require shared spaces for metadata")                             \
3760                                                                             \
3761   product(bool, DumpSharedSpaces, false,                                    \
3762           "Special mode: JVM reads a class list, loads classes, builds "    \
3763           "shared spaces, and dumps the shared spaces to a file to be "     \
3764           "used in future JVM runs")                                        \
3765                                                                             \
3766   product(bool, PrintSharedSpaces, false,                                   \
3767           "Print usage of shared spaces")                                   \
3768                                                                             \
3769   product(bool, PrintSharedArchiveAndExit, false,                           \
3770           "Print shared archive file contents")                             \
3771                                                                             \
3772   product(bool, PrintSharedDictionary, false,                               \
3773           "If PrintSharedArchiveAndExit is true, also print the shared "    \
3774           "dictionary")                                                     \
3775                                                                             \
3776   product(uintx, SharedReadWriteSize,  NOT_LP64(12*M) LP64_ONLY(16*M),      \
3777           "Size of read-write space for metadata (in bytes)")               \
3778                                                                             \
3779   product(uintx, SharedReadOnlySize,  NOT_LP64(12*M) LP64_ONLY(16*M),       \
3780           "Size of read-only space for metadata (in bytes)")                \
3781                                                                             \
3782   product(uintx, SharedMiscDataSize,    NOT_LP64(2*M) LP64_ONLY(4*M),       \
3783           "Size of the shared miscellaneous data area (in bytes)")          \
3784                                                                             \
3785   product(uintx, SharedMiscCodeSize,    120*K,                              \
3786           "Size of the shared miscellaneous code area (in bytes)")          \
3787                                                                             \
3788   product(uintx, SharedBaseAddress, LP64_ONLY(32*G)                         \
3789           NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)),                           \
3790           "Address to allocate shared memory region for class data")        \
3791                                                                             \
3792   product(uintx, SharedSymbolTableBucketSize, 4,                            \
3793           "Average number of symbols per bucket in shared table")           \
3794                                                                             \
3795   diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false,              \
3796           "Do not quit -Xshare:dump even if we encounter unverifiable "     \
3797           "classes. Just exclude them from the shared dictionary.")         \
3798                                                                             \
3799   diagnostic(bool, PrintMethodHandleStubs, false,                           \
3800           "Print generated stub code for method handles")                   \
3801                                                                             \
3802   develop(bool, TraceMethodHandles, false,                                  \
3803           "trace internal method handle operations")                        \
3804                                                                             \
3805   diagnostic(bool, VerifyMethodHandles, trueInDebug,                        \
3806           "perform extra checks when constructing method handles")          \
3807                                                                             \
3808   diagnostic(bool, ShowHiddenFrames, false,                                 \
3809           "show method handle implementation frames (usually hidden)")      \
3810                                                                             \
3811   experimental(bool, TrustFinalNonStaticFields, false,                      \
3812           "trust final non-static declarations for constant folding")       \
3813                                                                             \
3814   diagnostic(bool, FoldStableValues, true,                                  \
3815           "Optimize loads from stable fields (marked w/ @Stable)")          \
3816                                                                             \
3817   develop(bool, TraceInvokeDynamic, false,                                  \
3818           "trace internal invoke dynamic operations")                       \
3819                                                                             \
3820   diagnostic(bool, PauseAtStartup,      false,                              \
3821           "Causes the VM to pause at startup time and wait for the pause "  \
3822           "file to be removed (default: ./vm.paused.<pid>)")                \
3823                                                                             \
3824   diagnostic(ccstr, PauseAtStartupFile, NULL,                               \
3825           "The file to create and for whose removal to await when pausing " \
3826           "at startup. (default: ./vm.paused.<pid>)")                       \
3827                                                                             \
3828   diagnostic(bool, PauseAtExit, false,                                      \
3829           "Pause and wait for keypress on exit if a debugger is attached")  \
3830                                                                             \
3831   product(bool, ExtendedDTraceProbes,    false,                             \
3832           "Enable performance-impacting dtrace probes")                     \
3833                                                                             \
3834   product(bool, DTraceMethodProbes, false,                                  \
3835           "Enable dtrace probes for method-entry and method-exit")          \
3836                                                                             \
3837   product(bool, DTraceAllocProbes, false,                                   \
3838           "Enable dtrace probes for object allocation")                     \
3839                                                                             \
3840   product(bool, DTraceMonitorProbes, false,                                 \
3841           "Enable dtrace probes for monitor events")                        \
3842                                                                             \
3843   product(bool, RelaxAccessControlCheck, false,                             \
3844           "Relax the access control checks in the verifier")                \
3845                                                                             \
3846   diagnostic(bool, PrintDTraceDOF, false,                                   \
3847           "Print the DTrace DOF passed to the system for JSDT probes")      \
3848                                                                             \
3849   product(uintx, StringTableSize, defaultStringTableSize,                   \
3850           "Number of buckets in the interned String table")                 \
3851                                                                             \
3852   experimental(uintx, SymbolTableSize, defaultSymbolTableSize,              \
3853           "Number of buckets in the JVM internal Symbol table")             \
3854                                                                             \
3855   product(bool, UseStringDeduplication, false,                              \
3856           "Use string deduplication")                                       \
3857                                                                             \
3858   product(bool, PrintStringDeduplicationStatistics, false,                  \
3859           "Print string deduplication statistics")                          \
3860                                                                             \
3861   product(uintx, StringDeduplicationAgeThreshold, 3,                        \
3862           "A string must reach this age (or be promoted to an old region) " \
3863           "to be considered for deduplication")                             \
3864                                                                             \
3865   diagnostic(bool, StringDeduplicationResizeALot, false,                    \
3866           "Force table resize every time the table is scanned")             \
3867                                                                             \
3868   diagnostic(bool, StringDeduplicationRehashALot, false,                    \
3869           "Force table rehash every time the table is scanned")             \
3870                                                                             \
3871   develop(bool, TraceDefaultMethods, false,                                 \
3872           "Trace the default method processing steps")                      \
3873                                                                             \
3874   develop(bool, VerifyGenericSignatures, false,                             \
3875           "Abort VM on erroneous or inconsistent generic signatures")       \
3876                                                                             \
3877   diagnostic(bool, WhiteBoxAPI, false,                                      \
3878           "Enable internal testing APIs")                                   \
3879                                                                             \
3880   product(bool, PrintGCCause, true,                                         \
3881           "Include GC cause in GC logging")                                 \
3882                                                                             \
3883   experimental(intx, SurvivorAlignmentInBytes, 0,                           \
3884            "Default survivor space alignment in bytes")                     \
3885                                                                             \
3886   product(bool , AllowNonVirtualCalls, false,                               \
3887           "Obey the ACC_SUPER flag and allow invokenonvirtual calls")       \
3888                                                                             \
3889   product(ccstr, DumpLoadedClassList, NULL,                                 \
3890           "Dump the names all loaded classes, that could be stored into "   \
3891           "the CDS archive, in the specified file")                         \
3892                                                                             \
3893   product(ccstr, SharedClassListFile, NULL,                                 \
3894           "Override the default CDS class list")                            \
3895                                                                             \
3896   diagnostic(ccstr, SharedArchiveFile, NULL,                                \
3897           "Override the default location of the CDS archive file")          \
3898                                                                             \
3899   product(ccstr, ExtraSharedClassListFile, NULL,                            \
3900           "Extra classlist for building the CDS archive file")              \
3901                                                                             \
3902   experimental(size_t, ArrayAllocatorMallocLimit,                           \
3903           SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1),                       \
3904           "Allocation less than this value will be allocated "              \
3905           "using malloc. Larger allocations will use mmap.")                \
3906                                                                             \
3907   experimental(bool, AlwaysAtomicAccesses, false,                           \
3908           "Accesses to all variables should always be atomic")              \
3909                                                                             \
3910   product(bool, EnableTracing, false,                                       \
3911           "Enable event-based tracing")                                     \
3912                                                                             \
3913   product(bool, UseLockedTracing, false,                                    \
3914           "Use locked-tracing when doing event-based tracing")
3915 
3916 /*
3917  *  Macros for factoring of globals
3918  */
3919 
3920 // Interface macros
3921 #define DECLARE_PRODUCT_FLAG(type, name, value, doc)      extern "C" type name;
3922 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc)          extern "C" type name;
3923 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc)   extern "C" type name;
3924 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3925 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc)   extern "C" type name;
3926 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc)   extern "C" type name;
3927 #ifdef PRODUCT
3928 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type CONST_##name; const type name = value;
3929 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type CONST_##name; const type name = pd_##name;
3930 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type CONST_##name;
3931 #else
3932 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type name;
3933 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type name;
3934 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type name;
3935 #endif
3936 // Special LP64 flags, product only needed for now.
3937 #ifdef _LP64
3938 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3939 #else
3940 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3941 #endif // _LP64
3942 
3943 // Implementation macros
3944 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc)      type name = value;
3945 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc)          type name = pd_##name;
3946 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc)   type name = value;
3947 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3948 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc)   type name = value;
3949 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc)   type name = value;
3950 #ifdef PRODUCT
3951 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type CONST_##name = value;
3952 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type CONST_##name = pd_##name;
3953 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type CONST_##name = value;
3954 #else
3955 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type name = value;
3956 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type name = pd_##name;
3957 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type name = value;
3958 #endif
3959 #ifdef _LP64
3960 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3961 #else
3962 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3963 #endif // _LP64
3964 
3965 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)
3966 
3967 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3968 
3969 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
3970 
3971 // Extensions
3972 
3973 #include "runtime/globals_ext.hpp"
3974 
3975 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP
--- EOF ---