1 /*
   2  * Copyright (c) 1997, 2011, 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 #ifdef TARGET_ARCH_x86
  30 # include "globals_x86.hpp"
  31 #endif
  32 #ifdef TARGET_ARCH_sparc
  33 # include "globals_sparc.hpp"
  34 #endif
  35 #ifdef TARGET_ARCH_zero
  36 # include "globals_zero.hpp"
  37 #endif
  38 #ifdef TARGET_ARCH_arm
  39 # include "globals_arm.hpp"
  40 #endif
  41 #ifdef TARGET_ARCH_ppc
  42 # include "globals_ppc.hpp"
  43 #endif
  44 #ifdef TARGET_OS_FAMILY_linux
  45 # include "globals_linux.hpp"
  46 #endif
  47 #ifdef TARGET_OS_FAMILY_solaris
  48 # include "globals_solaris.hpp"
  49 #endif
  50 #ifdef TARGET_OS_FAMILY_windows
  51 # include "globals_windows.hpp"
  52 #endif
  53 #ifdef TARGET_OS_FAMILY_bsd
  54 # include "globals_bsd.hpp"
  55 #endif
  56 #ifdef TARGET_OS_ARCH_linux_x86
  57 # include "globals_linux_x86.hpp"
  58 #endif
  59 #ifdef TARGET_OS_ARCH_linux_sparc
  60 # include "globals_linux_sparc.hpp"
  61 #endif
  62 #ifdef TARGET_OS_ARCH_linux_zero
  63 # include "globals_linux_zero.hpp"
  64 #endif
  65 #ifdef TARGET_OS_ARCH_solaris_x86
  66 # include "globals_solaris_x86.hpp"
  67 #endif
  68 #ifdef TARGET_OS_ARCH_solaris_sparc
  69 # include "globals_solaris_sparc.hpp"
  70 #endif
  71 #ifdef TARGET_OS_ARCH_windows_x86
  72 # include "globals_windows_x86.hpp"
  73 #endif
  74 #ifdef TARGET_OS_ARCH_linux_arm
  75 # include "globals_linux_arm.hpp"
  76 #endif
  77 #ifdef TARGET_OS_ARCH_linux_ppc
  78 # include "globals_linux_ppc.hpp"
  79 #endif
  80 #ifdef TARGET_OS_ARCH_bsd_x86
  81 # include "globals_bsd_x86.hpp"
  82 #endif
  83 #ifdef TARGET_OS_ARCH_bsd_zero
  84 # include "globals_bsd_zero.hpp"
  85 #endif
  86 #ifdef COMPILER1
  87 #ifdef TARGET_ARCH_x86
  88 # include "c1_globals_x86.hpp"
  89 #endif
  90 #ifdef TARGET_ARCH_sparc
  91 # include "c1_globals_sparc.hpp"
  92 #endif
  93 #ifdef TARGET_ARCH_arm
  94 # include "c1_globals_arm.hpp"
  95 #endif
  96 #ifdef TARGET_ARCH_ppc
  97 # include "c1_globals_ppc.hpp"
  98 #endif
  99 #ifdef TARGET_OS_FAMILY_linux
 100 # include "c1_globals_linux.hpp"
 101 #endif
 102 #ifdef TARGET_OS_FAMILY_solaris
 103 # include "c1_globals_solaris.hpp"
 104 #endif
 105 #ifdef TARGET_OS_FAMILY_windows
 106 # include "c1_globals_windows.hpp"
 107 #endif
 108 #ifdef TARGET_OS_FAMILY_bsd
 109 # include "c1_globals_bsd.hpp"
 110 #endif
 111 #endif
 112 #ifdef COMPILER2
 113 #ifdef TARGET_ARCH_x86
 114 # include "c2_globals_x86.hpp"
 115 #endif
 116 #ifdef TARGET_ARCH_sparc
 117 # include "c2_globals_sparc.hpp"
 118 #endif
 119 #ifdef TARGET_ARCH_arm
 120 # include "c2_globals_arm.hpp"
 121 #endif
 122 #ifdef TARGET_OS_FAMILY_linux
 123 # include "c2_globals_linux.hpp"
 124 #endif
 125 #ifdef TARGET_OS_FAMILY_solaris
 126 # include "c2_globals_solaris.hpp"
 127 #endif
 128 #ifdef TARGET_OS_FAMILY_windows
 129 # include "c2_globals_windows.hpp"
 130 #endif
 131 #ifdef TARGET_OS_FAMILY_bsd
 132 # include "c2_globals_bsd.hpp"
 133 #endif
 134 #endif
 135 #ifdef SHARK
 136 #ifdef TARGET_ARCH_zero
 137 # include "shark_globals_zero.hpp"
 138 #endif
 139 #endif
 140 
 141 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
 142 define_pd_global(bool, BackgroundCompilation,        false);
 143 define_pd_global(bool, UseTLAB,                      false);
 144 define_pd_global(bool, CICompileOSR,                 false);
 145 define_pd_global(bool, UseTypeProfile,               false);
 146 define_pd_global(bool, UseOnStackReplacement,        false);
 147 define_pd_global(bool, InlineIntrinsics,             false);
 148 define_pd_global(bool, PreferInterpreterNativeStubs, true);
 149 define_pd_global(bool, ProfileInterpreter,           false);
 150 define_pd_global(bool, ProfileTraps,                 false);
 151 define_pd_global(bool, TieredCompilation,            false);
 152 
 153 define_pd_global(intx, CompileThreshold,             0);
 154 define_pd_global(intx, BackEdgeThreshold,            0);
 155 
 156 define_pd_global(intx, OnStackReplacePercentage,     0);
 157 define_pd_global(bool, ResizeTLAB,                   false);
 158 define_pd_global(intx, FreqInlineSize,               0);
 159 define_pd_global(intx, InlineSmallCode,              0);
 160 define_pd_global(intx, NewSizeThreadIncrease,        4*K);
 161 define_pd_global(intx, InlineClassNatives,           true);
 162 define_pd_global(intx, InlineUnsafeOps,              true);
 163 define_pd_global(intx, InitialCodeCacheSize,         160*K);
 164 define_pd_global(intx, ReservedCodeCacheSize,        32*M);
 165 define_pd_global(intx, CodeCacheExpansionSize,       32*K);
 166 define_pd_global(intx, CodeCacheMinBlockLength,      1);
 167 define_pd_global(uintx,PermSize,    ScaleForWordSize(4*M));
 168 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M));
 169 define_pd_global(bool, NeverActAsServerClassMachine, true);
 170 define_pd_global(uint64_t,MaxRAM,                    1ULL*G);
 171 #define CI_COMPILER_COUNT 0
 172 #else
 173 
 174 #ifdef COMPILER2
 175 #define CI_COMPILER_COUNT 2
 176 #else
 177 #define CI_COMPILER_COUNT 1
 178 #endif // COMPILER2
 179 
 180 #endif // no compilers
 181 
 182 
 183 // string type aliases used only in this file
 184 typedef const char* ccstr;
 185 typedef const char* ccstrlist;   // represents string arguments which accumulate
 186 
 187 enum FlagValueOrigin {
 188   DEFAULT          = 0,
 189   COMMAND_LINE     = 1,
 190   ENVIRON_VAR      = 2,
 191   CONFIG_FILE      = 3,
 192   MANAGEMENT       = 4,
 193   ERGONOMIC        = 5,
 194   ATTACH_ON_DEMAND = 6,
 195   INTERNAL         = 99
 196 };
 197 
 198 struct Flag {
 199   const char *type;
 200   const char *name;
 201   void*       addr;
 202 
 203   NOT_PRODUCT(const char *doc;)
 204 
 205   const char *kind;
 206   FlagValueOrigin origin;
 207 
 208   // points to all Flags static array
 209   static Flag *flags;
 210 
 211   // number of flags
 212   static size_t numFlags;
 213 
 214   static Flag* find_flag(char* name, size_t length);
 215 
 216   bool is_bool() const        { return strcmp(type, "bool") == 0; }
 217   bool get_bool() const       { return *((bool*) addr); }
 218   void set_bool(bool value)   { *((bool*) addr) = value; }
 219 
 220   bool is_intx()  const       { return strcmp(type, "intx")  == 0; }
 221   intx get_intx() const       { return *((intx*) addr); }
 222   void set_intx(intx value)   { *((intx*) addr) = value; }
 223 
 224   bool is_uintx() const       { return strcmp(type, "uintx") == 0; }
 225   uintx get_uintx() const     { return *((uintx*) addr); }
 226   void set_uintx(uintx value) { *((uintx*) addr) = value; }
 227 
 228   bool is_uint64_t() const          { return strcmp(type, "uint64_t") == 0; }
 229   uint64_t get_uint64_t() const     { return *((uint64_t*) addr); }
 230   void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; }
 231 
 232   bool is_double() const        { return strcmp(type, "double") == 0; }
 233   double get_double() const     { return *((double*) addr); }
 234   void set_double(double value) { *((double*) addr) = value; }
 235 
 236   bool is_ccstr() const          { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; }
 237   bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; }
 238   ccstr get_ccstr() const     { return *((ccstr*) addr); }
 239   void set_ccstr(ccstr value) { *((ccstr*) addr) = value; }
 240 
 241   bool is_unlocker() const;
 242   bool is_unlocked() const;
 243   bool is_writeable() const;
 244   bool is_external() const;
 245 
 246   bool is_unlocker_ext() const;
 247   bool is_unlocked_ext() const;
 248   bool is_writeable_ext() const;
 249   bool is_external_ext() const;
 250 
 251   void print_on(outputStream* st, bool withComments = false );
 252   void print_as_flag(outputStream* st);
 253 };
 254 
 255 // debug flags control various aspects of the VM and are global accessible
 256 
 257 // use FlagSetting to temporarily change some debug flag
 258 // e.g. FlagSetting fs(DebugThisAndThat, true);
 259 // restored to previous value upon leaving scope
 260 class FlagSetting {
 261   bool val;
 262   bool* flag;
 263  public:
 264   FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
 265   ~FlagSetting()                       { *flag = val; }
 266 };
 267 
 268 
 269 class CounterSetting {
 270   intx* counter;
 271  public:
 272   CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
 273   ~CounterSetting()         { (*counter)--; }
 274 };
 275 
 276 
 277 class IntFlagSetting {
 278   intx val;
 279   intx* flag;
 280  public:
 281   IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; }
 282   ~IntFlagSetting()                       { *flag = val; }
 283 };
 284 
 285 
 286 class DoubleFlagSetting {
 287   double val;
 288   double* flag;
 289  public:
 290   DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
 291   ~DoubleFlagSetting()                           { *flag = val; }
 292 };
 293 
 294 
 295 class CommandLineFlags {
 296  public:
 297   static bool boolAt(char* name, size_t len, bool* value);
 298   static bool boolAt(char* name, bool* value)      { return boolAt(name, strlen(name), value); }
 299   static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin);
 300   static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin)   { return boolAtPut(name, strlen(name), value, origin); }
 301 
 302   static bool intxAt(char* name, size_t len, intx* value);
 303   static bool intxAt(char* name, intx* value)      { return intxAt(name, strlen(name), value); }
 304   static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin);
 305   static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin)   { return intxAtPut(name, strlen(name), value, origin); }
 306 
 307   static bool uintxAt(char* name, size_t len, uintx* value);
 308   static bool uintxAt(char* name, uintx* value)    { return uintxAt(name, strlen(name), value); }
 309   static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin);
 310   static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); }
 311 
 312   static bool uint64_tAt(char* name, size_t len, uint64_t* value);
 313   static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
 314   static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin);
 315   static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
 316 
 317   static bool doubleAt(char* name, size_t len, double* value);
 318   static bool doubleAt(char* name, double* value)    { return doubleAt(name, strlen(name), value); }
 319   static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin);
 320   static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); }
 321 
 322   static bool ccstrAt(char* name, size_t len, ccstr* value);
 323   static bool ccstrAt(char* name, ccstr* value)    { return ccstrAt(name, strlen(name), value); }
 324   static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin);
 325   static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); }
 326 
 327   // Returns false if name is not a command line flag.
 328   static bool wasSetOnCmdline(const char* name, bool* value);
 329   static void printSetFlags(outputStream* out);
 330 
 331   static void printFlags(outputStream* out, bool withComments);
 332 
 333   static void verify() PRODUCT_RETURN;
 334 };
 335 
 336 // use this for flags that are true by default in the debug version but
 337 // false in the optimized version, and vice versa
 338 #ifdef ASSERT
 339 #define trueInDebug  true
 340 #define falseInDebug false
 341 #else
 342 #define trueInDebug  false
 343 #define falseInDebug true
 344 #endif
 345 
 346 // use this for flags that are true per default in the product build
 347 // but false in development builds, and vice versa
 348 #ifdef PRODUCT
 349 #define trueInProduct  true
 350 #define falseInProduct false
 351 #else
 352 #define trueInProduct  false
 353 #define falseInProduct true
 354 #endif
 355 
 356 // use this for flags that are true per default in the tiered build
 357 // but false in non-tiered builds, and vice versa
 358 #ifdef TIERED
 359 #define  trueInTiered true
 360 #define falseInTiered false
 361 #else
 362 #define  trueInTiered false
 363 #define falseInTiered true
 364 #endif
 365 
 366 #ifdef JAVASE_EMBEDDED
 367 #define falseInEmbedded false
 368 #else
 369 #define falseInEmbedded true
 370 #endif
 371 
 372 // develop flags are settable / visible only during development and are constant in the PRODUCT version
 373 // product flags are always settable / visible
 374 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
 375 
 376 // A flag must be declared with one of the following types:
 377 // bool, intx, uintx, ccstr.
 378 // The type "ccstr" is an alias for "const char*" and is used
 379 // only in this file, because the macrology requires single-token type names.
 380 
 381 // Note: Diagnostic options not meant for VM tuning or for product modes.
 382 // They are to be used for VM quality assurance or field diagnosis
 383 // of VM bugs.  They are hidden so that users will not be encouraged to
 384 // try them as if they were VM ordinary execution options.  However, they
 385 // are available in the product version of the VM.  Under instruction
 386 // from support engineers, VM customers can turn them on to collect
 387 // diagnostic information about VM problems.  To use a VM diagnostic
 388 // option, you must first specify +UnlockDiagnosticVMOptions.
 389 // (This master switch also affects the behavior of -Xprintflags.)
 390 //
 391 // experimental flags are in support of features that are not
 392 //    part of the officially supported product, but are available
 393 //    for experimenting with. They could, for example, be performance
 394 //    features that may not have undergone full or rigorous QA, but which may
 395 //    help performance in some cases and released for experimentation
 396 //    by the community of users and developers. This flag also allows one to
 397 //    be able to build a fully supported product that nonetheless also
 398 //    ships with some unsupported, lightly tested, experimental features.
 399 //    Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
 400 //    UnlockExperimentalVMOptions flag, which allows the control and
 401 //    modification of the experimental flags.
 402 //
 403 // Nota bene: neither diagnostic nor experimental options should be used casually,
 404 //    and they are not supported on production loads, except under explicit
 405 //    direction from support engineers.
 406 //
 407 // manageable flags are writeable external product flags.
 408 //    They are dynamically writeable through the JDK management interface
 409 //    (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
 410 //    These flags are external exported interface (see CCC).  The list of
 411 //    manageable flags can be queried programmatically through the management
 412 //    interface.
 413 //
 414 //    A flag can be made as "manageable" only if
 415 //    - the flag is defined in a CCC as an external exported interface.
 416 //    - the VM implementation supports dynamic setting of the flag.
 417 //      This implies that the VM must *always* query the flag variable
 418 //      and not reuse state related to the flag state at any given time.
 419 //    - you want the flag to be queried programmatically by the customers.
 420 //
 421 // product_rw flags are writeable internal product flags.
 422 //    They are like "manageable" flags but for internal/private use.
 423 //    The list of product_rw flags are internal/private flags which
 424 //    may be changed/removed in a future release.  It can be set
 425 //    through the management interface to get/set value
 426 //    when the name of flag is supplied.
 427 //
 428 //    A flag can be made as "product_rw" only if
 429 //    - the VM implementation supports dynamic setting of the flag.
 430 //      This implies that the VM must *always* query the flag variable
 431 //      and not reuse state related to the flag state at any given time.
 432 //
 433 // Note that when there is a need to support develop flags to be writeable,
 434 // it can be done in the same way as product_rw.
 435 
 436 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
 437                                                                             \
 438   lp64_product(bool, UseCompressedOops, false,                              \
 439             "Use 32-bit object references in 64-bit VM. "                   \
 440             "lp64_product means flag is always constant in 32 bit VM")      \
 441                                                                             \
 442   notproduct(bool, CheckCompressedOops, true,                               \
 443             "generate checks in encoding/decoding code in debug VM")        \
 444                                                                             \
 445   product_pd(uintx, HeapBaseMinAddress,                                     \
 446             "OS specific low limit for heap base address")                  \
 447                                                                             \
 448   diagnostic(bool, PrintCompressedOopsMode, false,                          \
 449             "Print compressed oops base address and encoding mode")         \
 450                                                                             \
 451   lp64_product(intx, ObjectAlignmentInBytes, 8,                             \
 452           "Default object alignment in bytes, 8 is minimum")                \
 453                                                                             \
 454   /* UseMembar is theoretically a temp flag used for memory barrier         \
 455    * removal testing.  It was supposed to be removed before FCS but has     \
 456    * been re-added (see 6401008) */                                         \
 457   product_pd(bool, UseMembar,                                               \
 458           "(Unstable) Issues membars on thread state transitions")          \
 459                                                                             \
 460   /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms    \
 461    * that don't support it.  This will be replaced by processor detection   \
 462    * logic.                                                                 \
 463    */                                                                       \
 464   product(bool, UsePPCLWSYNC, true,                                         \
 465           "Use lwsync instruction if true, else use slower sync")           \
 466                                                                             \
 467   develop(bool, CleanChunkPoolAsync, falseInEmbedded,                       \
 468           "Whether to clean the chunk pool asynchronously")                 \
 469                                                                             \
 470   /* Temporary: See 6948537 */                                             \
 471   experimental(bool, UseMemSetInBOT, true,                                  \
 472           "(Unstable) uses memset in BOT updates in GC code")               \
 473                                                                             \
 474   diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug,                  \
 475           "Enable normal processing of flags relating to field diagnostics")\
 476                                                                             \
 477   experimental(bool, UnlockExperimentalVMOptions, false,                    \
 478           "Enable normal processing of flags relating to experimental features")\
 479                                                                             \
 480   product(bool, JavaMonitorsInStackTrace, true,                             \
 481           "Print info. about Java monitor locks when the stacks are dumped")\
 482                                                                             \
 483   product_pd(bool, UseLargePages,                                           \
 484           "Use large page memory")                                          \
 485                                                                             \
 486   product_pd(bool, UseLargePagesIndividualAllocation,                       \
 487           "Allocate large pages individually for better affinity")          \
 488                                                                             \
 489   develop(bool, LargePagesIndividualAllocationInjectError, false,           \
 490           "Fail large pages individual allocation")                         \
 491                                                                             \
 492   develop(bool, TracePageSizes, false,                                      \
 493           "Trace page size selection and usage.")                           \
 494                                                                             \
 495   product(bool, UseNUMA, false,                                             \
 496           "Use NUMA if available")                                          \
 497                                                                             \
 498   product(bool, UseNUMAInterleaving, false,                                 \
 499           "Interleave memory across NUMA nodes if available")               \
 500                                                                             \
 501   product(uintx, NUMAInterleaveGranularity, 2*M,                            \
 502           "Granularity to use for NUMA interleaving on Windows OS")         \
 503                                                                             \
 504   product(bool, ForceNUMA, false,                                           \
 505           "Force NUMA optimizations on single-node/UMA systems")            \
 506                                                                             \
 507   product(intx, NUMAChunkResizeWeight, 20,                                  \
 508           "Percentage (0-100) used to weight the current sample when "      \
 509           "computing exponentially decaying average for "                   \
 510           "AdaptiveNUMAChunkSizing")                                        \
 511                                                                             \
 512   product(intx, NUMASpaceResizeRate, 1*G,                                   \
 513           "Do not reallocate more that this amount per collection")         \
 514                                                                             \
 515   product(bool, UseAdaptiveNUMAChunkSizing, true,                           \
 516           "Enable adaptive chunk sizing for NUMA")                          \
 517                                                                             \
 518   product(bool, NUMAStats, false,                                           \
 519           "Print NUMA stats in detailed heap information")                  \
 520                                                                             \
 521   product(intx, NUMAPageScanRate, 256,                                      \
 522           "Maximum number of pages to include in the page scan procedure")  \
 523                                                                             \
 524   product_pd(bool, NeedsDeoptSuspend,                                       \
 525           "True for register window machines (sparc/ia64)")                 \
 526                                                                             \
 527   product(intx, UseSSE, 99,                                                 \
 528           "Highest supported SSE instructions set on x86/x64")              \
 529                                                                             \
 530   product(intx, UseAVX, 99,                                                 \
 531           "Highest supported AVX instructions set on x86/x64")              \
 532                                                                             \
 533   product(intx, UseVIS, 99,                                                 \
 534           "Highest supported VIS instructions set on Sparc")                \
 535                                                                             \
 536   product(uintx, LargePageSizeInBytes, 0,                                   \
 537           "Large page size (0 to let VM choose the page size")              \
 538                                                                             \
 539   product(uintx, LargePageHeapSizeThreshold, 128*M,                         \
 540           "Use large pages if max heap is at least this big")               \
 541                                                                             \
 542   product(bool, ForceTimeHighResolution, false,                             \
 543           "Using high time resolution(For Win32 only)")                     \
 544                                                                             \
 545   develop(bool, TraceItables, false,                                        \
 546           "Trace initialization and use of itables")                        \
 547                                                                             \
 548   develop(bool, TracePcPatching, false,                                     \
 549           "Trace usage of frame::patch_pc")                                 \
 550                                                                             \
 551   develop(bool, TraceJumps, false,                                          \
 552           "Trace assembly jumps in thread ring buffer")                     \
 553                                                                             \
 554   develop(bool, TraceRelocator, false,                                      \
 555           "Trace the bytecode relocator")                                   \
 556                                                                             \
 557   develop(bool, TraceLongCompiles, false,                                   \
 558           "Print out every time compilation is longer than "                \
 559           "a given threashold")                                             \
 560                                                                             \
 561   develop(bool, SafepointALot, false,                                       \
 562           "Generates a lot of safepoints. Works with "                      \
 563           "GuaranteedSafepointInterval")                                    \
 564                                                                             \
 565   product_pd(bool, BackgroundCompilation,                                   \
 566           "A thread requesting compilation is not blocked during "          \
 567           "compilation")                                                    \
 568                                                                             \
 569   product(bool, PrintVMQWaitTime, false,                                    \
 570           "Prints out the waiting time in VM operation queue")              \
 571                                                                             \
 572   develop(bool, BailoutToInterpreterForThrows, false,                       \
 573           "Compiled methods which throws/catches exceptions will be "       \
 574           "deopt and intp.")                                                \
 575                                                                             \
 576   develop(bool, NoYieldsInMicrolock, false,                                 \
 577           "Disable yields in microlock")                                    \
 578                                                                             \
 579   develop(bool, TraceOopMapGeneration, false,                               \
 580           "Shows oopmap generation")                                        \
 581                                                                             \
 582   product(bool, MethodFlushing, true,                                       \
 583           "Reclamation of zombie and not-entrant methods")                  \
 584                                                                             \
 585   develop(bool, VerifyStack, false,                                         \
 586           "Verify stack of each thread when it is entering a runtime call") \
 587                                                                             \
 588   diagnostic(bool, ForceUnreachable, false,                                 \
 589           "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \
 590                                                                             \
 591   notproduct(bool, StressDerivedPointers, false,                            \
 592           "Force scavenge when a derived pointers is detected on stack "    \
 593           "after rtm call")                                                 \
 594                                                                             \
 595   develop(bool, TraceDerivedPointers, false,                                \
 596           "Trace traversal of derived pointers on stack")                   \
 597                                                                             \
 598   notproduct(bool, TraceCodeBlobStacks, false,                              \
 599           "Trace stack-walk of codeblobs")                                  \
 600                                                                             \
 601   product(bool, PrintJNIResolving, false,                                   \
 602           "Used to implement -v:jni")                                       \
 603                                                                             \
 604   notproduct(bool, PrintRewrites, false,                                    \
 605           "Print methods that are being rewritten")                         \
 606                                                                             \
 607   product(bool, UseInlineCaches, true,                                      \
 608           "Use Inline Caches for virtual calls ")                           \
 609                                                                             \
 610   develop(bool, InlineArrayCopy, true,                                      \
 611           "inline arraycopy native that is known to be part of "            \
 612           "base library DLL")                                               \
 613                                                                             \
 614   develop(bool, InlineObjectHash, true,                                     \
 615           "inline Object::hashCode() native that is known to be part "      \
 616           "of base library DLL")                                            \
 617                                                                             \
 618   develop(bool, InlineObjectCopy, true,                                     \
 619           "inline Object.clone and Arrays.copyOf[Range] intrinsics")        \
 620                                                                             \
 621   develop(bool, InlineNatives, true,                                        \
 622           "inline natives that are known to be part of base library DLL")   \
 623                                                                             \
 624   develop(bool, InlineMathNatives, true,                                    \
 625           "inline SinD, CosD, etc.")                                        \
 626                                                                             \
 627   develop(bool, InlineClassNatives, true,                                   \
 628           "inline Class.isInstance, etc")                                   \
 629                                                                             \
 630   develop(bool, InlineAtomicLong, true,                                     \
 631           "inline sun.misc.AtomicLong")                                     \
 632                                                                             \
 633   develop(bool, InlineThreadNatives, true,                                  \
 634           "inline Thread.currentThread, etc")                               \
 635                                                                             \
 636   develop(bool, InlineReflectionGetCallerClass, true,                       \
 637           "inline sun.reflect.Reflection.getCallerClass(), known to be part "\
 638           "of base library DLL")                                            \
 639                                                                             \
 640   develop(bool, InlineUnsafeOps, true,                                      \
 641           "inline memory ops (native methods) from sun.misc.Unsafe")        \
 642                                                                             \
 643   develop(bool, ConvertCmpD2CmpF, true,                                     \
 644           "Convert cmpD to cmpF when one input is constant in float range") \
 645                                                                             \
 646   develop(bool, ConvertFloat2IntClipping, true,                             \
 647           "Convert float2int clipping idiom to integer clipping")           \
 648                                                                             \
 649   develop(bool, SpecialStringCompareTo, true,                               \
 650           "special version of string compareTo")                            \
 651                                                                             \
 652   develop(bool, SpecialStringIndexOf, true,                                 \
 653           "special version of string indexOf")                              \
 654                                                                             \
 655   develop(bool, SpecialStringEquals, true,                                  \
 656           "special version of string equals")                               \
 657                                                                             \
 658   develop(bool, SpecialArraysEquals, true,                                  \
 659           "special version of Arrays.equals(char[],char[])")                \
 660                                                                             \
 661   product(bool, UseSSE42Intrinsics, false,                                  \
 662           "SSE4.2 versions of intrinsics")                                  \
 663                                                                             \
 664   product(bool, UseCondCardMark, false,                                     \
 665           "Check for already marked card before updating card table")       \
 666                                                                             \
 667   develop(bool, TraceCallFixup, false,                                      \
 668           "traces all call fixups")                                         \
 669                                                                             \
 670   develop(bool, DeoptimizeALot, false,                                      \
 671           "deoptimize at every exit from the runtime system")               \
 672                                                                             \
 673   notproduct(ccstrlist, DeoptimizeOnlyAt, "",                               \
 674           "a comma separated list of bcis to deoptimize at")                \
 675                                                                             \
 676   product(bool, DeoptimizeRandom, false,                                    \
 677           "deoptimize random frames on random exit from the runtime system")\
 678                                                                             \
 679   notproduct(bool, ZombieALot, false,                                       \
 680           "creates zombies (non-entrant) at exit from the runt. system")    \
 681                                                                             \
 682   product(bool, UnlinkSymbolsALot, false,                                   \
 683           "unlink unreferenced symbols from the symbol table at safepoints")\
 684                                                                             \
 685   notproduct(bool, WalkStackALot, false,                                    \
 686           "trace stack (no print) at every exit from the runtime system")   \
 687                                                                             \
 688   product(bool, Debugging, false,                                           \
 689           "set when executing debug methods in debug.ccp "                  \
 690           "(to prevent triggering assertions)")                             \
 691                                                                             \
 692   notproduct(bool, StrictSafepointChecks, trueInDebug,                      \
 693           "Enable strict checks that safepoints cannot happen for threads " \
 694           "that used No_Safepoint_Verifier")                                \
 695                                                                             \
 696   notproduct(bool, VerifyLastFrame, false,                                  \
 697           "Verify oops on last frame on entry to VM")                       \
 698                                                                             \
 699   develop(bool, TraceHandleAllocation, false,                               \
 700           "Prints out warnings when suspicious many handles are allocated") \
 701                                                                             \
 702   product(bool, UseCompilerSafepoints, true,                                \
 703           "Stop at safepoints in compiled code")                            \
 704                                                                             \
 705   product(bool, UseSplitVerifier, true,                                     \
 706           "use split verifier with StackMapTable attributes")               \
 707                                                                             \
 708   product(bool, FailOverToOldVerifier, true,                                \
 709           "fail over to old verifier when split verifier fails")            \
 710                                                                             \
 711   develop(bool, ShowSafepointMsgs, false,                                   \
 712           "Show msg. about safepoint synch.")                               \
 713                                                                             \
 714   product(bool, SafepointTimeout, false,                                    \
 715           "Time out and warn or fail after SafepointTimeoutDelay "          \
 716           "milliseconds if failed to reach safepoint")                      \
 717                                                                             \
 718   develop(bool, DieOnSafepointTimeout, false,                               \
 719           "Die upon failure to reach safepoint (see SafepointTimeout)")     \
 720                                                                             \
 721   /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */      \
 722   /* typically, at most a few retries are needed */                         \
 723   product(intx, SuspendRetryCount, 50,                                      \
 724           "Maximum retry count for an external suspend request")            \
 725                                                                             \
 726   product(intx, SuspendRetryDelay, 5,                                       \
 727           "Milliseconds to delay per retry (* current_retry_count)")        \
 728                                                                             \
 729   product(bool, AssertOnSuspendWaitFailure, false,                          \
 730           "Assert/Guarantee on external suspend wait failure")              \
 731                                                                             \
 732   product(bool, TraceSuspendWaitFailures, false,                            \
 733           "Trace external suspend wait failures")                           \
 734                                                                             \
 735   product(bool, MaxFDLimit, true,                                           \
 736           "Bump the number of file descriptors to max in solaris.")         \
 737                                                                             \
 738   notproduct(bool, LogEvents, trueInDebug,                                  \
 739           "Enable Event log")                                               \
 740                                                                             \
 741   product(bool, BytecodeVerificationRemote, true,                           \
 742           "Enables the Java bytecode verifier for remote classes")          \
 743                                                                             \
 744   product(bool, BytecodeVerificationLocal, false,                           \
 745           "Enables the Java bytecode verifier for local classes")           \
 746                                                                             \
 747   develop(bool, ForceFloatExceptions, trueInDebug,                          \
 748           "Force exceptions on FP stack under/overflow")                    \
 749                                                                             \
 750   develop(bool, SoftMatchFailure, trueInProduct,                            \
 751           "If the DFA fails to match a node, print a message and bail out") \
 752                                                                             \
 753   develop(bool, VerifyStackAtCalls, false,                                  \
 754           "Verify that the stack pointer is unchanged after calls")         \
 755                                                                             \
 756   develop(bool, TraceJavaAssertions, false,                                 \
 757           "Trace java language assertions")                                 \
 758                                                                             \
 759   notproduct(bool, CheckAssertionStatusDirectives, false,                   \
 760           "temporary - see javaClasses.cpp")                                \
 761                                                                             \
 762   notproduct(bool, PrintMallocFree, false,                                  \
 763           "Trace calls to C heap malloc/free allocation")                   \
 764                                                                             \
 765   product(bool, PrintOopAddress, false,                                     \
 766           "Always print the location of the oop")                           \
 767                                                                             \
 768   notproduct(bool, VerifyCodeCacheOften, false,                             \
 769           "Verify compiled-code cache often")                               \
 770                                                                             \
 771   develop(bool, ZapDeadCompiledLocals, false,                               \
 772           "Zap dead locals in compiler frames")                             \
 773                                                                             \
 774   notproduct(bool, ZapDeadLocalsOld, false,                                 \
 775           "Zap dead locals (old version, zaps all frames when "             \
 776           "entering the VM")                                                \
 777                                                                             \
 778   notproduct(bool, CheckOopishValues, false,                                \
 779           "Warn if value contains oop ( requires ZapDeadLocals)")           \
 780                                                                             \
 781   develop(bool, UseMallocOnly, false,                                       \
 782           "use only malloc/free for allocation (no resource area/arena)")   \
 783                                                                             \
 784   develop(bool, PrintMalloc, false,                                         \
 785           "print all malloc/free calls")                                    \
 786                                                                             \
 787   develop(bool, PrintMallocStatistics, false,                               \
 788           "print malloc/free statistics")                                   \
 789                                                                             \
 790   develop(bool, ZapResourceArea, trueInDebug,                               \
 791           "Zap freed resource/arena space with 0xABABABAB")                 \
 792                                                                             \
 793   notproduct(bool, ZapVMHandleArea, trueInDebug,                            \
 794           "Zap freed VM handle space with 0xBCBCBCBC")                      \
 795                                                                             \
 796   develop(bool, ZapJNIHandleArea, trueInDebug,                              \
 797           "Zap freed JNI handle space with 0xFEFEFEFE")                     \
 798                                                                             \
 799   notproduct(bool, ZapStackSegments, trueInDebug,                           \
 800              "Zap allocated/freed Stack segments with 0xFADFADED")          \
 801                                                                             \
 802   develop(bool, ZapUnusedHeapArea, trueInDebug,                             \
 803           "Zap unused heap space with 0xBAADBABE")                          \
 804                                                                             \
 805   develop(bool, TraceZapUnusedHeapArea, false,                              \
 806           "Trace zapping of unused heap space")                             \
 807                                                                             \
 808   develop(bool, CheckZapUnusedHeapArea, false,                              \
 809           "Check zapping of unused heap space")                             \
 810                                                                             \
 811   develop(bool, ZapFillerObjects, trueInDebug,                              \
 812           "Zap filler objects with 0xDEAFBABE")                             \
 813                                                                             \
 814   develop(bool, PrintVMMessages, true,                                      \
 815           "Print vm messages on console")                                   \
 816                                                                             \
 817   product(bool, PrintGCApplicationConcurrentTime, false,                    \
 818           "Print the time the application has been running")                \
 819                                                                             \
 820   product(bool, PrintGCApplicationStoppedTime, false,                       \
 821           "Print the time the application has been stopped")                \
 822                                                                             \
 823   notproduct(uintx, ErrorHandlerTest, 0,                                    \
 824           "If > 0, provokes an error after VM initialization; the value"    \
 825           "determines which error to provoke.  See test_error_handler()"    \
 826           "in debug.cpp.")                                                  \
 827                                                                             \
 828   develop(bool, Verbose, false,                                             \
 829           "Prints additional debugging information from other modes")       \
 830                                                                             \
 831   develop(bool, PrintMiscellaneous, false,                                  \
 832           "Prints uncategorized debugging information (requires +Verbose)") \
 833                                                                             \
 834   develop(bool, WizardMode, false,                                          \
 835           "Prints much more debugging information")                         \
 836                                                                             \
 837   product(bool, ShowMessageBoxOnError, false,                               \
 838           "Keep process alive on VM fatal error")                           \
 839                                                                             \
 840   product(bool, CreateMinidumpOnCrash, false,                               \
 841           "Create minidump on VM fatal error")                              \
 842                                                                             \
 843   product_pd(bool, UseOSErrorReporting,                                     \
 844           "Let VM fatal error propagate to the OS (ie. WER on Windows)")    \
 845                                                                             \
 846   product(bool, SuppressFatalErrorMessage, false,                           \
 847           "Do NO Fatal Error report [Avoid deadlock]")                      \
 848                                                                             \
 849   product(ccstrlist, OnError, "",                                           \
 850           "Run user-defined commands on fatal error; see VMError.cpp "      \
 851           "for examples")                                                   \
 852                                                                             \
 853   product(ccstrlist, OnOutOfMemoryError, "",                                \
 854           "Run user-defined commands on first java.lang.OutOfMemoryError")  \
 855                                                                             \
 856   manageable(bool, HeapDumpBeforeFullGC, false,                             \
 857           "Dump heap to file before any major stop-world GC")               \
 858                                                                             \
 859   manageable(bool, HeapDumpAfterFullGC, false,                              \
 860           "Dump heap to file after any major stop-world GC")                \
 861                                                                             \
 862   manageable(bool, HeapDumpOnOutOfMemoryError, false,                       \
 863           "Dump heap to file when java.lang.OutOfMemoryError is thrown")    \
 864                                                                             \
 865   manageable(ccstr, HeapDumpPath, NULL,                                     \
 866           "When HeapDumpOnOutOfMemoryError is on, the path (filename or"    \
 867           "directory) of the dump file (defaults to java_pid<pid>.hprof"    \
 868           "in the working directory)")                                      \
 869                                                                             \
 870   develop(uintx, SegmentedHeapDumpThreshold, 2*G,                           \
 871           "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) "     \
 872           "when the heap usage is larger than this")                        \
 873                                                                             \
 874   develop(uintx, HeapDumpSegmentSize, 1*G,                                  \
 875           "Approximate segment size when generating a segmented heap dump") \
 876                                                                             \
 877   develop(bool, BreakAtWarning, false,                                      \
 878           "Execute breakpoint upon encountering VM warning")                \
 879                                                                             \
 880   product_pd(bool, UseVectoredExceptions,                                   \
 881           "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \
 882                                                                             \
 883   develop(bool, TraceVMOperation, false,                                    \
 884           "Trace vm operations")                                            \
 885                                                                             \
 886   develop(bool, UseFakeTimers, false,                                       \
 887           "Tells whether the VM should use system time or a fake timer")    \
 888                                                                             \
 889   diagnostic(bool, LogCompilation, false,                                   \
 890           "Log compilation activity in detail to hotspot.log or LogFile")   \
 891                                                                             \
 892   product(bool, PrintCompilation, false,                                    \
 893           "Print compilations")                                             \
 894                                                                             \
 895   diagnostic(bool, TraceNMethodInstalls, false,                             \
 896              "Trace nmethod intallation")                                   \
 897                                                                             \
 898   diagnostic(intx, ScavengeRootsInCode, 2,                                  \
 899              "0: do not allow scavengable oops in the code cache; "         \
 900              "1: allow scavenging from the code cache; "                    \
 901              "2: emit as many constants as the compiler can see")           \
 902                                                                             \
 903   diagnostic(bool, TraceOSRBreakpoint, false,                               \
 904              "Trace OSR Breakpoint ")                                       \
 905                                                                             \
 906   diagnostic(bool, TraceCompileTriggered, false,                            \
 907              "Trace compile triggered")                                     \
 908                                                                             \
 909   diagnostic(bool, TraceTriggers, false,                                    \
 910              "Trace triggers")                                              \
 911                                                                             \
 912   product(bool, AlwaysRestoreFPU, false,                                    \
 913           "Restore the FPU control word after every JNI call (expensive)")  \
 914                                                                             \
 915   diagnostic(bool, PrintCompilation2, false,                                \
 916           "Print additional statistics per compilation")                    \
 917                                                                             \
 918   diagnostic(bool, PrintAdapterHandlers, false,                             \
 919           "Print code generated for i2c/c2i adapters")                      \
 920                                                                             \
 921   develop(bool, VerifyAdapterSharing, false,                                \
 922           "Verify that the code for shared adapters is the equivalent")     \
 923                                                                             \
 924   diagnostic(bool, PrintAssembly, false,                                    \
 925           "Print assembly code (using external disassembler.so)")           \
 926                                                                             \
 927   diagnostic(ccstr, PrintAssemblyOptions, NULL,                             \
 928           "Options string passed to disassembler.so")                       \
 929                                                                             \
 930   diagnostic(bool, PrintNMethods, false,                                    \
 931           "Print assembly code for nmethods when generated")                \
 932                                                                             \
 933   diagnostic(bool, PrintNativeNMethods, false,                              \
 934           "Print assembly code for native nmethods when generated")         \
 935                                                                             \
 936   develop(bool, PrintDebugInfo, false,                                      \
 937           "Print debug information for all nmethods when generated")        \
 938                                                                             \
 939   develop(bool, PrintRelocations, false,                                    \
 940           "Print relocation information for all nmethods when generated")   \
 941                                                                             \
 942   develop(bool, PrintDependencies, false,                                   \
 943           "Print dependency information for all nmethods when generated")   \
 944                                                                             \
 945   develop(bool, PrintExceptionHandlers, false,                              \
 946           "Print exception handler tables for all nmethods when generated") \
 947                                                                             \
 948   develop(bool, InterceptOSException, false,                                \
 949           "Starts debugger when an implicit OS (e.g., NULL) "               \
 950           "exception happens")                                              \
 951                                                                             \
 952   notproduct(bool, PrintCodeCache, false,                                   \
 953           "Print the compiled_code cache when exiting")                     \
 954                                                                             \
 955   develop(bool, PrintCodeCache2, false,                                     \
 956           "Print detailed info on the compiled_code cache when exiting")    \
 957                                                                             \
 958   diagnostic(bool, PrintStubCode, false,                                    \
 959           "Print generated stub code")                                      \
 960                                                                             \
 961   product(bool, StackTraceInThrowable, true,                                \
 962           "Collect backtrace in throwable when exception happens")          \
 963                                                                             \
 964   product(bool, OmitStackTraceInFastThrow, true,                            \
 965           "Omit backtraces for some 'hot' exceptions in optimized code")    \
 966                                                                             \
 967   product(bool, ProfilerPrintByteCodeStatistics, false,                     \
 968           "Prints byte code statictics when dumping profiler output")       \
 969                                                                             \
 970   product(bool, ProfilerRecordPC, false,                                    \
 971           "Collects tick for each 16 byte interval of compiled code")       \
 972                                                                             \
 973   product(bool, ProfileVM, false,                                           \
 974           "Profiles ticks that fall within VM (either in the VM Thread "    \
 975           "or VM code called through stubs)")                               \
 976                                                                             \
 977   product(bool, ProfileIntervals, false,                                    \
 978           "Prints profiles for each interval (see ProfileIntervalsTicks)")  \
 979                                                                             \
 980   notproduct(bool, ProfilerCheckIntervals, false,                           \
 981           "Collect and print info on spacing of profiler ticks")            \
 982                                                                             \
 983   develop(bool, PrintJVMWarnings, false,                                    \
 984           "Prints warnings for unimplemented JVM functions")                \
 985                                                                             \
 986   product(bool, PrintWarnings, true,                                        \
 987           "Prints JVM warnings to output stream")                           \
 988                                                                             \
 989   notproduct(uintx, WarnOnStalledSpinLock, 0,                               \
 990           "Prints warnings for stalled SpinLocks")                          \
 991                                                                             \
 992   develop(bool, InitializeJavaLangSystem, true,                             \
 993           "Initialize java.lang.System - turn off for individual "          \
 994           "method debugging")                                               \
 995                                                                             \
 996   develop(bool, InitializeJavaLangString, true,                             \
 997           "Initialize java.lang.String - turn off for individual "          \
 998           "method debugging")                                               \
 999                                                                             \
1000   develop(bool, InitializeJavaLangExceptionsErrors, true,                   \
1001           "Initialize various error and exception classes - turn off for "  \
1002           "individual method debugging")                                    \
1003                                                                             \
1004   product(bool, RegisterFinalizersAtInit, true,                             \
1005           "Register finalizable objects at end of Object.<init> or "        \
1006           "after allocation")                                               \
1007                                                                             \
1008   develop(bool, RegisterReferences, true,                                   \
1009           "Tells whether the VM should register soft/weak/final/phantom "   \
1010           "references")                                                     \
1011                                                                             \
1012   develop(bool, IgnoreRewrites, false,                                      \
1013           "Supress rewrites of bytecodes in the oopmap generator. "         \
1014           "This is unsafe!")                                                \
1015                                                                             \
1016   develop(bool, PrintCodeCacheExtension, false,                             \
1017           "Print extension of code cache")                                  \
1018                                                                             \
1019   develop(bool, UsePrivilegedStack, true,                                   \
1020           "Enable the security JVM functions")                              \
1021                                                                             \
1022   develop(bool, IEEEPrecision, true,                                        \
1023           "Enables IEEE precision (for INTEL only)")                        \
1024                                                                             \
1025   develop(bool, ProtectionDomainVerification, true,                         \
1026           "Verifies protection domain before resolution in system "         \
1027           "dictionary")                                                     \
1028                                                                             \
1029   product(bool, ClassUnloading, true,                                       \
1030           "Do unloading of classes")                                        \
1031                                                                             \
1032   diagnostic(bool, LinkWellKnownClasses, false,                             \
1033           "Resolve a well known class as soon as its name is seen")         \
1034                                                                             \
1035   develop(bool, DisableStartThread, false,                                  \
1036           "Disable starting of additional Java threads "                    \
1037           "(for debugging only)")                                           \
1038                                                                             \
1039   develop(bool, MemProfiling, false,                                        \
1040           "Write memory usage profiling to log file")                       \
1041                                                                             \
1042   notproduct(bool, PrintSystemDictionaryAtExit, false,                      \
1043           "Prints the system dictionary at exit")                           \
1044                                                                             \
1045   diagnostic(bool, UnsyncloadClass, false,                                  \
1046           "Unstable: VM calls loadClass unsynchronized. Custom "            \
1047           "class loader  must call VM synchronized for findClass "          \
1048           "and defineClass.")                                               \
1049                                                                             \
1050   product(bool, AlwaysLockClassLoader, false,                               \
1051           "Require the VM to acquire the class loader lock before calling " \
1052           "loadClass() even for class loaders registering "                 \
1053           "as parallel capable")                                            \
1054                                                                             \
1055   product(bool, AllowParallelDefineClass, false,                            \
1056           "Allow parallel defineClass requests for class loaders "          \
1057           "registering as parallel capable")                                \
1058                                                                             \
1059   product(bool, MustCallLoadClassInternal, false,                           \
1060           "Call loadClassInternal() rather than loadClass()")               \
1061                                                                             \
1062   product_pd(bool, DontYieldALot,                                           \
1063           "Throw away obvious excess yield calls (for SOLARIS only)")       \
1064                                                                             \
1065   product_pd(bool, ConvertSleepToYield,                                     \
1066           "Converts sleep(0) to thread yield "                              \
1067           "(may be off for SOLARIS to improve GUI)")                        \
1068                                                                             \
1069   product(bool, ConvertYieldToSleep, false,                                 \
1070           "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
1071           "behavior (SOLARIS only)")                                        \
1072                                                                             \
1073   product(bool, UseBoundThreads, true,                                      \
1074           "Bind user level threads to kernel threads (for SOLARIS only)")   \
1075                                                                             \
1076   develop(bool, UseDetachedThreads, true,                                   \
1077           "Use detached threads that are recycled upon termination "        \
1078           "(for SOLARIS only)")                                             \
1079                                                                             \
1080   product(bool, UseLWPSynchronization, true,                                \
1081           "Use LWP-based instead of libthread-based synchronization "       \
1082           "(SPARC only)")                                                   \
1083                                                                             \
1084   product(ccstr, SyncKnobs, NULL,                                           \
1085           "(Unstable) Various monitor synchronization tunables")            \
1086                                                                             \
1087   product(intx, EmitSync, 0,                                                \
1088           "(Unsafe,Unstable) "                                              \
1089           " Controls emission of inline sync fast-path code")               \
1090                                                                             \
1091   product(intx, AlwaysInflate, 0, "(Unstable) Force inflation")             \
1092                                                                             \
1093   product(intx, MonitorBound, 0, "Bound Monitor population")                \
1094                                                                             \
1095   product(bool, MonitorInUseLists, false, "Track Monitors for Deflation")   \
1096                                                                             \
1097   product(intx, Atomics, 0,                                                 \
1098           "(Unsafe,Unstable) Diagnostic - Controls emission of atomics")    \
1099                                                                             \
1100   product(intx, FenceInstruction, 0,                                        \
1101           "(Unsafe,Unstable) Experimental")                                 \
1102                                                                             \
1103   product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
1104                                                                             \
1105   product(intx, SyncVerbose, 0, "(Unstable)" )                              \
1106                                                                             \
1107   product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" )                    \
1108                                                                             \
1109   product(intx, hashCode, 0,                                                \
1110          "(Unstable) select hashCode generation algorithm" )                \
1111                                                                             \
1112   product(intx, WorkAroundNPTLTimedWaitHang, 1,                             \
1113          "(Unstable, Linux-specific)"                                       \
1114          " avoid NPTL-FUTEX hang pthread_cond_timedwait" )                  \
1115                                                                             \
1116   product(bool, FilterSpuriousWakeups, true,                                \
1117           "Prevent spurious or premature wakeups from object.wait "         \
1118           "(Solaris only)")                                                 \
1119                                                                             \
1120   product(intx, NativeMonitorTimeout, -1, "(Unstable)" )                    \
1121   product(intx, NativeMonitorFlags, 0, "(Unstable)" )                       \
1122   product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" )                  \
1123                                                                             \
1124   develop(bool, UsePthreads, false,                                         \
1125           "Use pthread-based instead of libthread-based synchronization "   \
1126           "(SPARC only)")                                                   \
1127                                                                             \
1128   product(bool, AdjustConcurrency, false,                                   \
1129           "call thr_setconcurrency at thread create time to avoid "         \
1130           "LWP starvation on MP systems (For Solaris Only)")                \
1131                                                                             \
1132   develop(bool, UpdateHotSpotCompilerFileOnError, true,                     \
1133           "Should the system attempt to update the compiler file when "     \
1134           "an error occurs?")                                               \
1135                                                                             \
1136   product(bool, ReduceSignalUsage, false,                                   \
1137           "Reduce the use of OS signals in Java and/or the VM")             \
1138                                                                             \
1139   notproduct(bool, ValidateMarkSweep, false,                                \
1140           "Do extra validation during MarkSweep collection")                \
1141                                                                             \
1142   notproduct(bool, RecordMarkSweepCompaction, false,                        \
1143           "Enable GC-to-GC recording and querying of compaction during "    \
1144           "MarkSweep")                                                      \
1145                                                                             \
1146   develop_pd(bool, ShareVtableStubs,                                        \
1147           "Share vtable stubs (smaller code but worse branch prediction")   \
1148                                                                             \
1149   develop(bool, LoadLineNumberTables, true,                                 \
1150           "Tells whether the class file parser loads line number tables")   \
1151                                                                             \
1152   develop(bool, LoadLocalVariableTables, true,                              \
1153           "Tells whether the class file parser loads local variable tables")\
1154                                                                             \
1155   develop(bool, LoadLocalVariableTypeTables, true,                          \
1156           "Tells whether the class file parser loads local variable type tables")\
1157                                                                             \
1158   product(bool, AllowUserSignalHandlers, false,                             \
1159           "Do not complain if the application installs signal handlers "    \
1160           "(Solaris & Linux only)")                                         \
1161                                                                             \
1162   product(bool, UseSignalChaining, true,                                    \
1163           "Use signal-chaining to invoke signal handlers installed "        \
1164           "by the application (Solaris & Linux only)")                      \
1165                                                                             \
1166   product(bool, UseAltSigs, false,                                          \
1167           "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM "      \
1168           "internal signals (Solaris only)")                                \
1169                                                                             \
1170   product(bool, UseSpinning, false,                                         \
1171           "Use spinning in monitor inflation and before entry")             \
1172                                                                             \
1173   product(bool, PreSpinYield, false,                                        \
1174           "Yield before inner spinning loop")                               \
1175                                                                             \
1176   product(bool, PostSpinYield, true,                                        \
1177           "Yield after inner spinning loop")                                \
1178                                                                             \
1179   product(bool, AllowJNIEnvProxy, false,                                    \
1180           "Allow JNIEnv proxies for jdbx")                                  \
1181                                                                             \
1182   product(bool, JNIDetachReleasesMonitors, true,                            \
1183           "JNI DetachCurrentThread releases monitors owned by thread")      \
1184                                                                             \
1185   product(bool, RestoreMXCSROnJNICalls, false,                              \
1186           "Restore MXCSR when returning from JNI calls")                    \
1187                                                                             \
1188   product(bool, CheckJNICalls, false,                                       \
1189           "Verify all arguments to JNI calls")                              \
1190                                                                             \
1191   product(bool, UseFastJNIAccessors, true,                                  \
1192           "Use optimized versions of Get<Primitive>Field")                  \
1193                                                                             \
1194   product(bool, EagerXrunInit, false,                                       \
1195           "Eagerly initialize -Xrun libraries; allows startup profiling, "  \
1196           " but not all -Xrun libraries may support the state of the VM at this time") \
1197                                                                             \
1198   product(bool, PreserveAllAnnotations, false,                              \
1199           "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
1200                                                                             \
1201   develop(uintx, PreallocatedOutOfMemoryErrorCount, 4,                      \
1202           "Number of OutOfMemoryErrors preallocated with backtrace")        \
1203                                                                             \
1204   product(bool, LazyBootClassLoader, true,                                  \
1205           "Enable/disable lazy opening of boot class path entries")         \
1206                                                                             \
1207   diagnostic(bool, UseIncDec, true,                                         \
1208           "Use INC, DEC instructions on x86")                               \
1209                                                                             \
1210   product(bool, UseNewLongLShift, false,                                    \
1211           "Use optimized bitwise shift left")                               \
1212                                                                             \
1213   product(bool, UseStoreImmI16, true,                                       \
1214           "Use store immediate 16-bits value instruction on x86")           \
1215                                                                             \
1216   product(bool, UseAddressNop, false,                                       \
1217           "Use '0F 1F [addr]' NOP instructions on x86 cpus")                \
1218                                                                             \
1219   product(bool, UseXmmLoadAndClearUpper, true,                              \
1220           "Load low part of XMM register and clear upper part")             \
1221                                                                             \
1222   product(bool, UseXmmRegToRegMoveAll, false,                               \
1223           "Copy all XMM register bits when moving value between registers") \
1224                                                                             \
1225   product(bool, UseXmmI2D, false,                                           \
1226           "Use SSE2 CVTDQ2PD instruction to convert Integer to Double")     \
1227                                                                             \
1228   product(bool, UseXmmI2F, false,                                           \
1229           "Use SSE2 CVTDQ2PS instruction to convert Integer to Float")      \
1230                                                                             \
1231   product(bool, UseXMMForArrayCopy, false,                                  \
1232           "Use SSE2 MOVQ instruction for Arraycopy")                        \
1233                                                                             \
1234   product(bool, UseUnalignedLoadStores, false,                              \
1235           "Use SSE2 MOVDQU instruction for Arraycopy")                      \
1236                                                                             \
1237   product(bool, UseCBCond, false,                                           \
1238           "Use compare and branch instruction on SPARC")                    \
1239                                                                             \
1240   product(intx, FieldsAllocationStyle, 1,                                   \
1241           "0 - type based with oops first, 1 - with oops last, "            \
1242           "2 - oops in super and sub classes are together")                 \
1243                                                                             \
1244   product(bool, CompactFields, true,                                        \
1245           "Allocate nonstatic fields in gaps between previous fields")      \
1246                                                                             \
1247   notproduct(bool, PrintCompactFieldsSavings, false,                        \
1248           "Print how many words were saved with CompactFields")             \
1249                                                                             \
1250   product(bool, UseBiasedLocking, true,                                     \
1251           "Enable biased locking in JVM")                                   \
1252                                                                             \
1253   product(intx, BiasedLockingStartupDelay, 4000,                            \
1254           "Number of milliseconds to wait before enabling biased locking")  \
1255                                                                             \
1256   diagnostic(bool, PrintBiasedLockingStatistics, false,                     \
1257           "Print statistics of biased locking in JVM")                      \
1258                                                                             \
1259   product(intx, BiasedLockingBulkRebiasThreshold, 20,                       \
1260           "Threshold of number of revocations per type to try to "          \
1261           "rebias all objects in the heap of that type")                    \
1262                                                                             \
1263   product(intx, BiasedLockingBulkRevokeThreshold, 40,                       \
1264           "Threshold of number of revocations per type to permanently "     \
1265           "revoke biases of all objects in the heap of that type")          \
1266                                                                             \
1267   product(intx, BiasedLockingDecayTime, 25000,                              \
1268           "Decay time (in milliseconds) to re-enable bulk rebiasing of a "  \
1269           "type after previous bulk rebias")                                \
1270                                                                             \
1271   develop(bool, JavaObjectsInPerm, false,                                   \
1272           "controls whether Classes and interned Strings are allocated"     \
1273           "in perm.  This purely intended to allow debugging issues"        \
1274           "in production.")                                                 \
1275                                                                             \
1276   /* tracing */                                                             \
1277                                                                             \
1278   notproduct(bool, TraceRuntimeCalls, false,                                \
1279           "Trace run-time calls")                                           \
1280                                                                             \
1281   develop(bool, TraceJNICalls, false,                                       \
1282           "Trace JNI calls")                                                \
1283                                                                             \
1284   notproduct(bool, TraceJVMCalls, false,                                    \
1285           "Trace JVM calls")                                                \
1286                                                                             \
1287   product(ccstr, TraceJVMTI, NULL,                                          \
1288           "Trace flags for JVMTI functions and events")                     \
1289                                                                             \
1290   /* This option can change an EMCP method into an obsolete method. */      \
1291   /* This can affect tests that except specific methods to be EMCP. */      \
1292   /* This option should be used with caution. */                            \
1293   product(bool, StressLdcRewrite, false,                                    \
1294           "Force ldc -> ldc_w rewrite during RedefineClasses")              \
1295                                                                             \
1296   product(intx, TraceRedefineClasses, 0,                                    \
1297           "Trace level for JVMTI RedefineClasses")                          \
1298                                                                             \
1299   develop(bool, StressMethodComparator, false,                              \
1300           "run the MethodComparator on all loaded methods")                 \
1301                                                                             \
1302   /* change to false by default sometime after Mustang */                   \
1303   product(bool, VerifyMergedCPBytecodes, true,                              \
1304           "Verify bytecodes after RedefineClasses constant pool merging")   \
1305                                                                             \
1306   develop(bool, TraceJNIHandleAllocation, false,                            \
1307           "Trace allocation/deallocation of JNI handle blocks")             \
1308                                                                             \
1309   develop(bool, TraceThreadEvents, false,                                   \
1310           "Trace all thread events")                                        \
1311                                                                             \
1312   develop(bool, TraceBytecodes, false,                                      \
1313           "Trace bytecode execution")                                       \
1314                                                                             \
1315   develop(bool, TraceClassInitialization, false,                            \
1316           "Trace class initialization")                                     \
1317                                                                             \
1318   develop(bool, TraceExceptions, false,                                     \
1319           "Trace exceptions")                                               \
1320                                                                             \
1321   develop(bool, TraceICs, false,                                            \
1322           "Trace inline cache changes")                                     \
1323                                                                             \
1324   notproduct(bool, TraceInvocationCounterOverflow, false,                   \
1325           "Trace method invocation counter overflow")                       \
1326                                                                             \
1327   develop(bool, TraceInlineCacheClearing, false,                            \
1328           "Trace clearing of inline caches in nmethods")                    \
1329                                                                             \
1330   develop(bool, TraceDependencies, false,                                   \
1331           "Trace dependencies")                                             \
1332                                                                             \
1333   develop(bool, VerifyDependencies, trueInDebug,                            \
1334          "Exercise and verify the compilation dependency mechanism")        \
1335                                                                             \
1336   develop(bool, TraceNewOopMapGeneration, false,                            \
1337           "Trace OopMapGeneration")                                         \
1338                                                                             \
1339   develop(bool, TraceNewOopMapGenerationDetailed, false,                    \
1340           "Trace OopMapGeneration: print detailed cell states")             \
1341                                                                             \
1342   develop(bool, TimeOopMap, false,                                          \
1343           "Time calls to GenerateOopMap::compute_map() in sum")             \
1344                                                                             \
1345   develop(bool, TimeOopMap2, false,                                         \
1346           "Time calls to GenerateOopMap::compute_map() individually")       \
1347                                                                             \
1348   develop(bool, TraceMonitorMismatch, false,                                \
1349           "Trace monitor matching failures during OopMapGeneration")        \
1350                                                                             \
1351   develop(bool, TraceOopMapRewrites, false,                                 \
1352           "Trace rewritting of method oops during oop map generation")      \
1353                                                                             \
1354   develop(bool, TraceSafepoint, false,                                      \
1355           "Trace safepoint operations")                                     \
1356                                                                             \
1357   develop(bool, TraceICBuffer, false,                                       \
1358           "Trace usage of IC buffer")                                       \
1359                                                                             \
1360   develop(bool, TraceCompiledIC, false,                                     \
1361           "Trace changes of compiled IC")                                   \
1362                                                                             \
1363   notproduct(bool, TraceZapDeadLocals, false,                               \
1364           "Trace zapping dead locals")                                      \
1365                                                                             \
1366   develop(bool, TraceStartupTime, false,                                    \
1367           "Trace setup time")                                               \
1368                                                                             \
1369   product(ccstr, HPILibPath, NULL,                                          \
1370           "Specify alternate path to HPI library")                          \
1371                                                                             \
1372   develop(bool, TraceProtectionDomainVerification, false,                   \
1373           "Trace protection domain verifcation")                            \
1374                                                                             \
1375   develop(bool, TraceClearedExceptions, false,                              \
1376           "Prints when an exception is forcibly cleared")                   \
1377                                                                             \
1378   product(bool, TraceClassResolution, false,                                \
1379           "Trace all constant pool resolutions (for debugging)")            \
1380                                                                             \
1381   product(bool, TraceBiasedLocking, false,                                  \
1382           "Trace biased locking in JVM")                                    \
1383                                                                             \
1384   product(bool, TraceMonitorInflation, false,                               \
1385           "Trace monitor inflation in JVM")                                 \
1386                                                                             \
1387   /* assembler */                                                           \
1388   product(bool, Use486InstrsOnly, false,                                    \
1389           "Use 80486 Compliant instruction subset")                         \
1390                                                                             \
1391   /* gc */                                                                  \
1392                                                                             \
1393   product(bool, UseSerialGC, false,                                         \
1394           "Use the serial garbage collector")                               \
1395                                                                             \
1396   product(bool, UseG1GC, false,                                             \
1397           "Use the Garbage-First garbage collector")                        \
1398                                                                             \
1399   product(bool, UseParallelGC, false,                                       \
1400           "Use the Parallel Scavenge garbage collector")                    \
1401                                                                             \
1402   product(bool, UseParallelOldGC, false,                                    \
1403           "Use the Parallel Old garbage collector")                         \
1404                                                                             \
1405   product(uintx, HeapMaximumCompactionInterval, 20,                         \
1406           "How often should we maximally compact the heap (not allowing "   \
1407           "any dead space)")                                                \
1408                                                                             \
1409   product(uintx, HeapFirstMaximumCompactionCount, 3,                        \
1410           "The collection count for the first maximum compaction")          \
1411                                                                             \
1412   product(bool, UseMaximumCompactionOnSystemGC, true,                       \
1413           "In the Parallel Old garbage collector maximum compaction for "   \
1414           "a system GC")                                                    \
1415                                                                             \
1416   product(uintx, ParallelOldDeadWoodLimiterMean, 50,                        \
1417           "The mean used by the par compact dead wood"                      \
1418           "limiter (a number between 0-100).")                              \
1419                                                                             \
1420   product(uintx, ParallelOldDeadWoodLimiterStdDev, 80,                      \
1421           "The standard deviation used by the par compact dead wood"        \
1422           "limiter (a number between 0-100).")                              \
1423                                                                             \
1424   product(uintx, ParallelGCThreads, 0,                                      \
1425           "Number of parallel threads parallel gc will use")                \
1426                                                                             \
1427   product(bool, UseDynamicNumberOfGCThreads, false,                         \
1428           "Dynamically choose the number of parallel threads "              \
1429           "parallel gc will use")                                           \
1430                                                                             \
1431   diagnostic(bool, ForceDynamicNumberOfGCThreads, false,                    \
1432           "Force dynamic selection of the number of"                        \
1433           "parallel threads parallel gc will use to aid debugging")         \
1434                                                                             \
1435   product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M),               \
1436           "Size of heap (bytes) per GC thread used in calculating the "     \
1437           "number of GC threads")                                           \
1438                                                                             \
1439   product(bool, TraceDynamicGCThreads, false,                               \
1440           "Trace the dynamic GC thread usage")                              \
1441                                                                             \
1442   develop(bool, ParallelOldGCSplitALot, false,                              \
1443           "Provoke splitting (copying data from a young gen space to"       \
1444           "multiple destination spaces)")                                   \
1445                                                                             \
1446   develop(uintx, ParallelOldGCSplitInterval, 3,                             \
1447           "How often to provoke splitting a young gen space")               \
1448                                                                             \
1449   develop(bool, TraceRegionTasksQueuing, false,                             \
1450           "Trace the queuing of the region tasks")                          \
1451                                                                             \
1452   product(uintx, ConcGCThreads, 0,                                          \
1453           "Number of threads concurrent gc will use")                       \
1454                                                                             \
1455   product(uintx, YoungPLABSize, 4096,                                       \
1456           "Size of young gen promotion labs (in HeapWords)")                \
1457                                                                             \
1458   product(uintx, OldPLABSize, 1024,                                         \
1459           "Size of old gen promotion labs (in HeapWords)")                  \
1460                                                                             \
1461   product(uintx, GCTaskTimeStampEntries, 200,                               \
1462           "Number of time stamp entries per gc worker thread")              \
1463                                                                             \
1464   product(bool, AlwaysTenure, false,                                        \
1465           "Always tenure objects in eden. (ParallelGC only)")               \
1466                                                                             \
1467   product(bool, NeverTenure, false,                                         \
1468           "Never tenure objects in eden, May tenure on overflow "           \
1469           "(ParallelGC only)")                                              \
1470                                                                             \
1471   product(bool, ScavengeBeforeFullGC, true,                                 \
1472           "Scavenge youngest generation before each full GC, "              \
1473           "used with UseParallelGC")                                        \
1474                                                                             \
1475   develop(bool, ScavengeWithObjectsInToSpace, false,                        \
1476           "Allow scavenges to occur when to_space contains objects.")       \
1477                                                                             \
1478   product(bool, UseConcMarkSweepGC, false,                                  \
1479           "Use Concurrent Mark-Sweep GC in the old generation")             \
1480                                                                             \
1481   product(bool, ExplicitGCInvokesConcurrent, false,                         \
1482           "A System.gc() request invokes a concurrent collection;"          \
1483           " (effective only when UseConcMarkSweepGC)")                      \
1484                                                                             \
1485   product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false,        \
1486           "A System.gc() request invokes a concurrent collection and "      \
1487           "also unloads classes during such a concurrent gc cycle "         \
1488           "(effective only when UseConcMarkSweepGC)")                       \
1489                                                                             \
1490   product(bool, GCLockerInvokesConcurrent, false,                           \
1491           "The exit of a JNI CS necessitating a scavenge also"              \
1492           " kicks off a bkgrd concurrent collection")                       \
1493                                                                             \
1494   product(uintx, GCLockerEdenExpansionPercent, 5,                           \
1495           "How much the GC can expand the eden by while the GC locker  "    \
1496           "is active (as a percentage)")                                    \
1497                                                                             \
1498   develop(bool, UseCMSAdaptiveFreeLists, true,                              \
1499           "Use Adaptive Free Lists in the CMS generation")                  \
1500                                                                             \
1501   develop(bool, UseAsyncConcMarkSweepGC, true,                              \
1502           "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1503                                                                             \
1504   develop(bool, RotateCMSCollectionTypes, false,                            \
1505           "Rotate the CMS collections among concurrent and STW")            \
1506                                                                             \
1507   product(bool, UseCMSBestFit, true,                                        \
1508           "Use CMS best fit allocation strategy")                           \
1509                                                                             \
1510   product(bool, UseCMSCollectionPassing, true,                              \
1511           "Use passing of collection from background to foreground")        \
1512                                                                             \
1513   product(bool, UseParNewGC, false,                                         \
1514           "Use parallel threads in the new generation.")                    \
1515                                                                             \
1516   product(bool, ParallelGCVerbose, false,                                   \
1517           "Verbose output for parallel GC.")                                \
1518                                                                             \
1519   product(intx, ParallelGCBufferWastePct, 10,                               \
1520           "wasted fraction of parallel allocation buffer.")                 \
1521                                                                             \
1522   diagnostic(bool, ParallelGCRetainPLAB, false,                             \
1523              "Retain parallel allocation buffers across scavenges; "        \
1524              " -- disabled because this currently conflicts with "          \
1525              " parallel card scanning under certain conditions ")           \
1526                                                                             \
1527   product(intx, TargetPLABWastePct, 10,                                     \
1528           "target wasted space in last buffer as pct of overall allocation")\
1529                                                                             \
1530   product(uintx, PLABWeight, 75,                                            \
1531           "Percentage (0-100) used to weight the current sample when"       \
1532           "computing exponentially decaying average for ResizePLAB.")       \
1533                                                                             \
1534   product(bool, ResizePLAB, true,                                           \
1535           "Dynamically resize (survivor space) promotion labs")             \
1536                                                                             \
1537   product(bool, PrintPLAB, false,                                           \
1538           "Print (survivor space) promotion labs sizing decisions")         \
1539                                                                             \
1540   product(intx, ParGCArrayScanChunk, 50,                                    \
1541           "Scan a subset and push remainder, if array is bigger than this") \
1542                                                                             \
1543   product(bool, ParGCUseLocalOverflow, false,                               \
1544           "Instead of a global overflow list, use local overflow stacks")   \
1545                                                                             \
1546   product(bool, ParGCTrimOverflow, true,                                    \
1547           "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \
1548                                                                             \
1549   notproduct(bool, ParGCWorkQueueOverflowALot, false,                       \
1550           "Whether we should simulate work queue overflow in ParNew")       \
1551                                                                             \
1552   notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000,                   \
1553           "An `interval' counter that determines how frequently "           \
1554           "we simulate overflow; a smaller number increases frequency")     \
1555                                                                             \
1556   product(uintx, ParGCDesiredObjsFromOverflowList, 20,                      \
1557           "The desired number of objects to claim from the overflow list")  \
1558                                                                             \
1559   diagnostic(uintx, ParGCStridesPerThread, 2,                               \
1560           "The number of strides per worker thread that we divide up the "  \
1561           "card table scanning work into")                                  \
1562                                                                             \
1563   diagnostic(intx, ParGCCardsPerStrideChunk, 256,                           \
1564           "The number of cards in each chunk of the parallel chunks used "  \
1565           "during card table scanning")                                     \
1566                                                                             \
1567   product(uintx, CMSParPromoteBlocksToClaim, 16,                            \
1568           "Number of blocks to attempt to claim when refilling CMS LAB for "\
1569           "parallel GC.")                                                   \
1570                                                                             \
1571   product(uintx, OldPLABWeight, 50,                                         \
1572           "Percentage (0-100) used to weight the current sample when"       \
1573           "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \
1574                                                                             \
1575   product(bool, ResizeOldPLAB, true,                                        \
1576           "Dynamically resize (old gen) promotion labs")                    \
1577                                                                             \
1578   product(bool, PrintOldPLAB, false,                                        \
1579           "Print (old gen) promotion labs sizing decisions")                \
1580                                                                             \
1581   product(uintx, CMSOldPLABMin, 16,                                         \
1582           "Min size of CMS gen promotion lab caches per worker per blksize")\
1583                                                                             \
1584   product(uintx, CMSOldPLABMax, 1024,                                       \
1585           "Max size of CMS gen promotion lab caches per worker per blksize")\
1586                                                                             \
1587   product(uintx, CMSOldPLABNumRefills, 4,                                   \
1588           "Nominal number of refills of CMS gen promotion lab cache"        \
1589           " per worker per block size")                                     \
1590                                                                             \
1591   product(bool, CMSOldPLABResizeQuicker, false,                             \
1592           "Whether to react on-the-fly during a scavenge to a sudden"       \
1593           " change in block demand rate")                                   \
1594                                                                             \
1595   product(uintx, CMSOldPLABToleranceFactor, 4,                              \
1596           "The tolerance of the phase-change detector for on-the-fly"       \
1597           " PLAB resizing during a scavenge")                               \
1598                                                                             \
1599   product(uintx, CMSOldPLABReactivityFactor, 2,                             \
1600           "The gain in the feedback loop for on-the-fly PLAB resizing"      \
1601           " during a scavenge")                                             \
1602                                                                             \
1603   product(uintx, CMSOldPLABReactivityCeiling, 10,                           \
1604           "The clamping of the gain in the feedback loop for on-the-fly"    \
1605           " PLAB resizing during a scavenge")                               \
1606                                                                             \
1607   product(bool, AlwaysPreTouch, false,                                      \
1608           "It forces all freshly committed pages to be pre-touched.")       \
1609                                                                             \
1610   product_pd(intx, CMSYoungGenPerWorker,                                    \
1611           "The maximum size of young gen chosen by default per GC worker "  \
1612           "thread available")                                               \
1613                                                                             \
1614   product(bool, GCOverheadReporting, false,                                 \
1615          "Enables the GC overhead reporting facility")                      \
1616                                                                             \
1617   product(intx, GCOverheadReportingPeriodMS, 100,                           \
1618           "Reporting period for conc GC overhead reporting, in ms ")        \
1619                                                                             \
1620   product(bool, CMSIncrementalMode, false,                                  \
1621           "Whether CMS GC should operate in \"incremental\" mode")          \
1622                                                                             \
1623   product(uintx, CMSIncrementalDutyCycle, 10,                               \
1624           "CMS incremental mode duty cycle (a percentage, 0-100).  If"      \
1625           "CMSIncrementalPacing is enabled, then this is just the initial"  \
1626           "value")                                                          \
1627                                                                             \
1628   product(bool, CMSIncrementalPacing, true,                                 \
1629           "Whether the CMS incremental mode duty cycle should be "          \
1630           "automatically adjusted")                                         \
1631                                                                             \
1632   product(uintx, CMSIncrementalDutyCycleMin, 0,                             \
1633           "Lower bound on the duty cycle when CMSIncrementalPacing is "     \
1634           "enabled (a percentage, 0-100)")                                  \
1635                                                                             \
1636   product(uintx, CMSIncrementalSafetyFactor, 10,                            \
1637           "Percentage (0-100) used to add conservatism when computing the " \
1638           "duty cycle")                                                     \
1639                                                                             \
1640   product(uintx, CMSIncrementalOffset, 0,                                   \
1641           "Percentage (0-100) by which the CMS incremental mode duty cycle" \
1642           " is shifted to the right within the period between young GCs")   \
1643                                                                             \
1644   product(uintx, CMSExpAvgFactor, 50,                                       \
1645           "Percentage (0-100) used to weight the current sample when"       \
1646           "computing exponential averages for CMS statistics.")             \
1647                                                                             \
1648   product(uintx, CMS_FLSWeight, 75,                                         \
1649           "Percentage (0-100) used to weight the current sample when"       \
1650           "computing exponentially decating averages for CMS FLS statistics.") \
1651                                                                             \
1652   product(uintx, CMS_FLSPadding, 1,                                         \
1653           "The multiple of deviation from mean to use for buffering"        \
1654           "against volatility in free list demand.")                        \
1655                                                                             \
1656   product(uintx, FLSCoalescePolicy, 2,                                      \
1657           "CMS: Aggression level for coalescing, increasing from 0 to 4")   \
1658                                                                             \
1659   product(bool, FLSAlwaysCoalesceLarge, false,                              \
1660           "CMS: Larger free blocks are always available for coalescing")    \
1661                                                                             \
1662   product(double, FLSLargestBlockCoalesceProximity, 0.99,                   \
1663           "CMS: the smaller the percentage the greater the coalition force")\
1664                                                                             \
1665   product(double, CMSSmallCoalSurplusPercent, 1.05,                         \
1666           "CMS: the factor by which to inflate estimated demand of small"   \
1667           " block sizes to prevent coalescing with an adjoining block")     \
1668                                                                             \
1669   product(double, CMSLargeCoalSurplusPercent, 0.95,                         \
1670           "CMS: the factor by which to inflate estimated demand of large"   \
1671           " block sizes to prevent coalescing with an adjoining block")     \
1672                                                                             \
1673   product(double, CMSSmallSplitSurplusPercent, 1.10,                        \
1674           "CMS: the factor by which to inflate estimated demand of small"   \
1675           " block sizes to prevent splitting to supply demand for smaller"  \
1676           " blocks")                                                        \
1677                                                                             \
1678   product(double, CMSLargeSplitSurplusPercent, 1.00,                        \
1679           "CMS: the factor by which to inflate estimated demand of large"   \
1680           " block sizes to prevent splitting to supply demand for smaller"  \
1681           " blocks")                                                        \
1682                                                                             \
1683   product(bool, CMSExtrapolateSweep, false,                                 \
1684           "CMS: cushion for block demand during sweep")                     \
1685                                                                             \
1686   product(uintx, CMS_SweepWeight, 75,                                       \
1687           "Percentage (0-100) used to weight the current sample when "      \
1688           "computing exponentially decaying average for inter-sweep "       \
1689           "duration")                                                       \
1690                                                                             \
1691   product(uintx, CMS_SweepPadding, 1,                                       \
1692           "The multiple of deviation from mean to use for buffering "       \
1693           "against volatility in inter-sweep duration.")                    \
1694                                                                             \
1695   product(uintx, CMS_SweepTimerThresholdMillis, 10,                         \
1696           "Skip block flux-rate sampling for an epoch unless inter-sweep "  \
1697           "duration exceeds this threhold in milliseconds")                 \
1698                                                                             \
1699   develop(bool, CMSTraceIncrementalMode, false,                             \
1700           "Trace CMS incremental mode")                                     \
1701                                                                             \
1702   develop(bool, CMSTraceIncrementalPacing, false,                           \
1703           "Trace CMS incremental mode pacing computation")                  \
1704                                                                             \
1705   develop(bool, CMSTraceThreadState, false,                                 \
1706           "Trace the CMS thread state (enable the trace_state() method)")   \
1707                                                                             \
1708   product(bool, CMSClassUnloadingEnabled, false,                            \
1709           "Whether class unloading enabled when using CMS GC")              \
1710                                                                             \
1711   product(uintx, CMSClassUnloadingMaxInterval, 0,                           \
1712           "When CMS class unloading is enabled, the maximum CMS cycle count"\
1713           " for which classes may not be unloaded")                         \
1714                                                                             \
1715   product(bool, CMSCompactWhenClearAllSoftRefs, true,                       \
1716           "Compact when asked to collect CMS gen with clear_all_soft_refs") \
1717                                                                             \
1718   product(bool, UseCMSCompactAtFullCollection, true,                        \
1719           "Use mark sweep compact at full collections")                     \
1720                                                                             \
1721   product(uintx, CMSFullGCsBeforeCompaction, 0,                             \
1722           "Number of CMS full collection done before compaction if > 0")    \
1723                                                                             \
1724   develop(intx, CMSDictionaryChoice, 0,                                     \
1725           "Use BinaryTreeDictionary as default in the CMS generation")      \
1726                                                                             \
1727   product(uintx, CMSIndexedFreeListReplenish, 4,                            \
1728           "Replenish an indexed free list with this number of chunks")     \
1729                                                                             \
1730   product(bool, CMSReplenishIntermediate, true,                             \
1731           "Replenish all intermediate free-list caches")                    \
1732                                                                             \
1733   product(bool, CMSSplitIndexedFreeListBlocks, true,                        \
1734           "When satisfying batched demand, split blocks from the "          \
1735           "IndexedFreeList whose size is a multiple of requested size")     \
1736                                                                             \
1737   product(bool, CMSLoopWarn, false,                                         \
1738           "Warn in case of excessive CMS looping")                          \
1739                                                                             \
1740   develop(bool, CMSOverflowEarlyRestoration, false,                         \
1741           "Whether preserved marks should be restored early")               \
1742                                                                             \
1743   product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M),              \
1744           "Size of marking stack")                                          \
1745                                                                             \
1746   product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M),          \
1747           "Max size of marking stack")                                      \
1748                                                                             \
1749   notproduct(bool, CMSMarkStackOverflowALot, false,                         \
1750           "Whether we should simulate frequent marking stack / work queue"  \
1751           " overflow")                                                      \
1752                                                                             \
1753   notproduct(uintx, CMSMarkStackOverflowInterval, 1000,                     \
1754           "An `interval' counter that determines how frequently"            \
1755           " we simulate overflow; a smaller number increases frequency")    \
1756                                                                             \
1757   product(uintx, CMSMaxAbortablePrecleanLoops, 0,                           \
1758           "(Temporary, subject to experimentation)"                         \
1759           "Maximum number of abortable preclean iterations, if > 0")        \
1760                                                                             \
1761   product(intx, CMSMaxAbortablePrecleanTime, 5000,                          \
1762           "(Temporary, subject to experimentation)"                         \
1763           "Maximum time in abortable preclean in ms")                       \
1764                                                                             \
1765   product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100,              \
1766           "(Temporary, subject to experimentation)"                         \
1767           "Nominal minimum work per abortable preclean iteration")          \
1768                                                                             \
1769   manageable(intx, CMSAbortablePrecleanWaitMillis, 100,                     \
1770           "(Temporary, subject to experimentation)"                         \
1771           " Time that we sleep between iterations when not given"           \
1772           " enough work per iteration")                                     \
1773                                                                             \
1774   product(uintx, CMSRescanMultiple, 32,                                     \
1775           "Size (in cards) of CMS parallel rescan task")                    \
1776                                                                             \
1777   product(uintx, CMSConcMarkMultiple, 32,                                   \
1778           "Size (in cards) of CMS concurrent MT marking task")              \
1779                                                                             \
1780   product(uintx, CMSRevisitStackSize, 1*M,                                  \
1781           "Size of CMS KlassKlass revisit stack")                           \
1782                                                                             \
1783   product(bool, CMSAbortSemantics, false,                                   \
1784           "Whether abort-on-overflow semantics is implemented")             \
1785                                                                             \
1786   product(bool, CMSParallelRemarkEnabled, true,                             \
1787           "Whether parallel remark enabled (only if ParNewGC)")             \
1788                                                                             \
1789   product(bool, CMSParallelSurvivorRemarkEnabled, true,                     \
1790           "Whether parallel remark of survivor space"                       \
1791           " enabled (effective only if CMSParallelRemarkEnabled)")          \
1792                                                                             \
1793   product(bool, CMSPLABRecordAlways, true,                                  \
1794           "Whether to always record survivor space PLAB bdries"             \
1795           " (effective only if CMSParallelSurvivorRemarkEnabled)")          \
1796                                                                             \
1797   product(bool, CMSConcurrentMTEnabled, true,                               \
1798           "Whether multi-threaded concurrent work enabled (if ParNewGC)")   \
1799                                                                             \
1800   product(bool, CMSPermGenPrecleaningEnabled, true,                         \
1801           "Whether concurrent precleaning enabled in perm gen"              \
1802           " (effective only when CMSPrecleaningEnabled is true)")           \
1803                                                                             \
1804   product(bool, CMSPrecleaningEnabled, true,                                \
1805           "Whether concurrent precleaning enabled")                         \
1806                                                                             \
1807   product(uintx, CMSPrecleanIter, 3,                                        \
1808           "Maximum number of precleaning iteration passes")                 \
1809                                                                             \
1810   product(uintx, CMSPrecleanNumerator, 2,                                   \
1811           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence"  \
1812           " ratio")                                                         \
1813                                                                             \
1814   product(uintx, CMSPrecleanDenominator, 3,                                 \
1815           "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence"  \
1816           " ratio")                                                         \
1817                                                                             \
1818   product(bool, CMSPrecleanRefLists1, true,                                 \
1819           "Preclean ref lists during (initial) preclean phase")             \
1820                                                                             \
1821   product(bool, CMSPrecleanRefLists2, false,                                \
1822           "Preclean ref lists during abortable preclean phase")             \
1823                                                                             \
1824   product(bool, CMSPrecleanSurvivors1, false,                               \
1825           "Preclean survivors during (initial) preclean phase")             \
1826                                                                             \
1827   product(bool, CMSPrecleanSurvivors2, true,                                \
1828           "Preclean survivors during abortable preclean phase")             \
1829                                                                             \
1830   product(uintx, CMSPrecleanThreshold, 1000,                                \
1831           "Don't re-iterate if #dirty cards less than this")                \
1832                                                                             \
1833   product(bool, CMSCleanOnEnter, true,                                      \
1834           "Clean-on-enter optimization for reducing number of dirty cards") \
1835                                                                             \
1836   product(uintx, CMSRemarkVerifyVariant, 1,                                 \
1837           "Choose variant (1,2) of verification following remark")          \
1838                                                                             \
1839   product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M,                   \
1840           "If Eden used is below this value, don't try to schedule remark") \
1841                                                                             \
1842   product(uintx, CMSScheduleRemarkEdenPenetration, 50,                      \
1843           "The Eden occupancy % at which to try and schedule remark pause") \
1844                                                                             \
1845   product(uintx, CMSScheduleRemarkSamplingRatio, 5,                         \
1846           "Start sampling Eden top at least before yg occupancy reaches"    \
1847           " 1/<ratio> of the size at which we plan to schedule remark")     \
1848                                                                             \
1849   product(uintx, CMSSamplingGrain, 16*K,                                    \
1850           "The minimum distance between eden samples for CMS (see above)")  \
1851                                                                             \
1852   product(bool, CMSScavengeBeforeRemark, false,                             \
1853           "Attempt scavenge before the CMS remark step")                    \
1854                                                                             \
1855   develop(bool, CMSTraceSweeper, false,                                     \
1856           "Trace some actions of the CMS sweeper")                          \
1857                                                                             \
1858   product(uintx, CMSWorkQueueDrainThreshold, 10,                            \
1859           "Don't drain below this size per parallel worker/thief")          \
1860                                                                             \
1861   manageable(intx, CMSWaitDuration, 2000,                                   \
1862           "Time in milliseconds that CMS thread waits for young GC")        \
1863                                                                             \
1864   product(bool, CMSYield, true,                                             \
1865           "Yield between steps of concurrent mark & sweep")                 \
1866                                                                             \
1867   product(uintx, CMSBitMapYieldQuantum, 10*M,                               \
1868           "Bitmap operations should process at most this many bits"         \
1869           "between yields")                                                 \
1870                                                                             \
1871   product(bool, CMSDumpAtPromotionFailure, false,                           \
1872           "Dump useful information about the state of the CMS old "         \
1873           " generation upon a promotion failure.")                          \
1874                                                                             \
1875   product(bool, CMSPrintChunksInDump, false,                                \
1876           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1877           " more detailed information about the free chunks.")              \
1878                                                                             \
1879   product(bool, CMSPrintObjectsInDump, false,                               \
1880           "In a dump enabled by CMSDumpAtPromotionFailure, include "        \
1881           " more detailed information about the allocated objects.")        \
1882                                                                             \
1883   diagnostic(bool, FLSVerifyAllHeapReferences, false,                       \
1884           "Verify that all refs across the FLS boundary "                   \
1885           " are to valid objects")                                          \
1886                                                                             \
1887   diagnostic(bool, FLSVerifyLists, false,                                   \
1888           "Do lots of (expensive) FreeListSpace verification")              \
1889                                                                             \
1890   diagnostic(bool, FLSVerifyIndexTable, false,                              \
1891           "Do lots of (expensive) FLS index table verification")            \
1892                                                                             \
1893   develop(bool, FLSVerifyDictionary, false,                                 \
1894           "Do lots of (expensive) FLS dictionary verification")             \
1895                                                                             \
1896   develop(bool, VerifyBlockOffsetArray, false,                              \
1897           "Do (expensive!) block offset array verification")                \
1898                                                                             \
1899   diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false,              \
1900           "Maintain _unallocated_block in BlockOffsetArray"                 \
1901           " (currently applicable only to CMS collector)")                  \
1902                                                                             \
1903   develop(bool, TraceCMSState, false,                                       \
1904           "Trace the state of the CMS collection")                          \
1905                                                                             \
1906   product(intx, RefDiscoveryPolicy, 0,                                      \
1907           "Whether reference-based(0) or referent-based(1)")                \
1908                                                                             \
1909   product(bool, ParallelRefProcEnabled, false,                              \
1910           "Enable parallel reference processing whenever possible")         \
1911                                                                             \
1912   product(bool, ParallelRefProcBalancingEnabled, true,                      \
1913           "Enable balancing of reference processing queues")                \
1914                                                                             \
1915   product(intx, CMSTriggerRatio, 80,                                        \
1916           "Percentage of MinHeapFreeRatio in CMS generation that is "       \
1917           "allocated before a CMS collection cycle commences")              \
1918                                                                             \
1919   product(intx, CMSTriggerPermRatio, 80,                                    \
1920           "Percentage of MinHeapFreeRatio in the CMS perm generation that " \
1921           "is allocated before a CMS collection cycle commences, that "     \
1922           "also collects the perm generation")                              \
1923                                                                             \
1924   product(uintx, CMSBootstrapOccupancy, 50,                                 \
1925           "Percentage CMS generation occupancy at which to "                \
1926           "initiate CMS collection for bootstrapping collection stats")     \
1927                                                                             \
1928   product(intx, CMSInitiatingOccupancyFraction, -1,                         \
1929           "Percentage CMS generation occupancy to start a CMS collection "  \
1930           "cycle. A negative value means that CMSTriggerRatio is used")     \
1931                                                                             \
1932   product(uintx, InitiatingHeapOccupancyPercent, 45,                        \
1933           "Percentage of the (entire) heap occupancy to start a "           \
1934           "concurrent GC cycle. It us used by GCs that trigger a "          \
1935           "concurrent GC cycle based on the occupancy of the entire heap, " \
1936           "not just one of the generations (e.g., G1). A value of 0 "       \
1937           "denotes 'do constant GC cycles'.")                               \
1938                                                                             \
1939   product(intx, CMSInitiatingPermOccupancyFraction, -1,                     \
1940           "Percentage CMS perm generation occupancy to start a "            \
1941           "CMScollection cycle. A negative value means that "               \
1942           "CMSTriggerPermRatio is used")                                    \
1943                                                                             \
1944   product(bool, UseCMSInitiatingOccupancyOnly, false,                       \
1945           "Only use occupancy as a crierion for starting a CMS collection") \
1946                                                                             \
1947   product(intx, CMSIsTooFullPercentage, 98,                                 \
1948           "An absolute ceiling above which CMS will always consider the "   \
1949           "perm gen ripe for collection")                                   \
1950                                                                             \
1951   develop(bool, CMSTestInFreeList, false,                                   \
1952           "Check if the coalesced range is already in the "                 \
1953           "free lists as claimed")                                          \
1954                                                                             \
1955   notproduct(bool, CMSVerifyReturnedBytes, false,                           \
1956           "Check that all the garbage collected was returned to the "       \
1957           "free lists.")                                                    \
1958                                                                             \
1959   notproduct(bool, ScavengeALot, false,                                     \
1960           "Force scavenge at every Nth exit from the runtime system "       \
1961           "(N=ScavengeALotInterval)")                                       \
1962                                                                             \
1963   develop(bool, FullGCALot, false,                                          \
1964           "Force full gc at every Nth exit from the runtime system "        \
1965           "(N=FullGCALotInterval)")                                         \
1966                                                                             \
1967   notproduct(bool, GCALotAtAllSafepoints, false,                            \
1968           "Enforce ScavengeALot/GCALot at all potential safepoints")        \
1969                                                                             \
1970   product(bool, PrintPromotionFailure, false,                               \
1971           "Print additional diagnostic information following "              \
1972           " promotion failure")                                             \
1973                                                                             \
1974   notproduct(bool, PromotionFailureALot, false,                             \
1975           "Use promotion failure handling on every youngest generation "    \
1976           "collection")                                                     \
1977                                                                             \
1978   develop(uintx, PromotionFailureALotCount, 1000,                           \
1979           "Number of promotion failures occurring at ParGCAllocBuffer"      \
1980           "refill attempts (ParNew) or promotion attempts "                 \
1981           "(other young collectors) ")                                      \
1982                                                                             \
1983   develop(uintx, PromotionFailureALotInterval, 5,                           \
1984           "Total collections between promotion failures alot")              \
1985                                                                             \
1986   experimental(intx, WorkStealingSleepMillis, 1,                            \
1987           "Sleep time when sleep is used for yields")                       \
1988                                                                             \
1989   experimental(uintx, WorkStealingYieldsBeforeSleep, 5000,                  \
1990           "Number of yields before a sleep is done during workstealing")    \
1991                                                                             \
1992   experimental(uintx, WorkStealingHardSpins, 4096,                          \
1993           "Number of iterations in a spin loop between checks on "          \
1994           "time out of hard spin")                                          \
1995                                                                             \
1996   experimental(uintx, WorkStealingSpinToYieldRatio, 10,                     \
1997           "Ratio of hard spins to calls to yield")                          \
1998                                                                             \
1999   product(uintx, PreserveMarkStackSize, 1024,                               \
2000           "Size for stack used in promotion failure handling")              \
2001                                                                             \
2002   develop(uintx, ObjArrayMarkingStride, 512,                                \
2003           "Number of ObjArray elements to push onto the marking stack"      \
2004           "before pushing a continuation entry")                            \
2005                                                                             \
2006   notproduct(bool, ExecuteInternalVMTests, false,                           \
2007           "Enable execution of internal VM tests.")                         \
2008                                                                             \
2009   product_pd(bool, UseTLAB, "Use thread-local object allocation")           \
2010                                                                             \
2011   product_pd(bool, ResizeTLAB,                                              \
2012           "Dynamically resize tlab size for threads")                       \
2013                                                                             \
2014   product(bool, ZeroTLAB, false,                                            \
2015           "Zero out the newly created TLAB")                                \
2016                                                                             \
2017   product(bool, FastTLABRefill, true,                                       \
2018           "Use fast TLAB refill code")                                      \
2019                                                                             \
2020   product(bool, PrintTLAB, false,                                           \
2021           "Print various TLAB related information")                         \
2022                                                                             \
2023   product(bool, TLABStats, true,                                            \
2024           "Print various TLAB related information")                         \
2025                                                                             \
2026   product(bool, UseBlockZeroing, false,                                     \
2027           "Use special cpu instructions for block zeroing")                 \
2028                                                                             \
2029   product(intx, BlockZeroingLowLimit, 2048,                                 \
2030           "Minimum size in bytes when block zeroing will be used")          \
2031                                                                             \
2032   product(bool, UseBlockCopy, false,                                        \
2033           "Use special cpu instructions for block copy")                    \
2034                                                                             \
2035   product(intx, BlockCopyLowLimit, 2048,                                    \
2036           "Minimum size in bytes when block copy will be used")             \
2037                                                                             \
2038   product(bool, PrintRevisitStats, false,                                   \
2039           "Print revisit (klass and MDO) stack related information")        \
2040                                                                             \
2041   EMBEDDED_ONLY(product(bool, LowMemoryProtection, true,                    \
2042           "Enable LowMemoryProtection"))                                    \
2043                                                                             \
2044   product_pd(bool, NeverActAsServerClassMachine,                            \
2045           "Never act like a server-class machine")                          \
2046                                                                             \
2047   product(bool, AlwaysActAsServerClassMachine, false,                       \
2048           "Always act like a server-class machine")                         \
2049                                                                             \
2050   product_pd(uint64_t, MaxRAM,                                              \
2051           "Real memory size (in bytes) used to set maximum heap size")      \
2052                                                                             \
2053   product(uintx, ErgoHeapSizeLimit, 0,                                      \
2054           "Maximum ergonomically set heap size (in bytes); zero means use " \
2055           "MaxRAM / MaxRAMFraction")                                        \
2056                                                                             \
2057   product(uintx, MaxRAMFraction, 4,                                         \
2058           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2059           "size")                                                           \
2060                                                                             \
2061   product(uintx, DefaultMaxRAMFraction, 4,                                  \
2062           "Maximum fraction (1/n) of real memory used for maximum heap "    \
2063           "size; deprecated: to be renamed to MaxRAMFraction")              \
2064                                                                             \
2065   product(uintx, MinRAMFraction, 2,                                         \
2066           "Minimum fraction (1/n) of real memory used for maxmimum heap "   \
2067           "size on systems with small physical memory size")                \
2068                                                                             \
2069   product(uintx, InitialRAMFraction, 64,                                    \
2070           "Fraction (1/n) of real memory used for initial heap size")       \
2071                                                                             \
2072   product(bool, UseAutoGCSelectPolicy, false,                               \
2073           "Use automatic collection selection policy")                      \
2074                                                                             \
2075   product(uintx, AutoGCSelectPauseMillis, 5000,                             \
2076           "Automatic GC selection pause threshhold in ms")                  \
2077                                                                             \
2078   product(bool, UseAdaptiveSizePolicy, true,                                \
2079           "Use adaptive generation sizing policies")                        \
2080                                                                             \
2081   product(bool, UsePSAdaptiveSurvivorSizePolicy, true,                      \
2082           "Use adaptive survivor sizing policies")                          \
2083                                                                             \
2084   product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true,     \
2085           "Use adaptive young-old sizing policies at minor collections")    \
2086                                                                             \
2087   product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true,     \
2088           "Use adaptive young-old sizing policies at major collections")    \
2089                                                                             \
2090   product(bool, UseAdaptiveSizePolicyWithSystemGC, false,                   \
2091           "Use statistics from System.GC for adaptive size policy")         \
2092                                                                             \
2093   product(bool, UseAdaptiveGCBoundary, false,                               \
2094           "Allow young-old boundary to move")                               \
2095                                                                             \
2096   develop(bool, TraceAdaptiveGCBoundary, false,                             \
2097           "Trace young-old boundary moves")                                 \
2098                                                                             \
2099   develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1,             \
2100           "Resize the virtual spaces of the young or old generations")      \
2101                                                                             \
2102   product(uintx, AdaptiveSizeThroughPutPolicy, 0,                           \
2103           "Policy for changeing generation size for throughput goals")      \
2104                                                                             \
2105   product(uintx, AdaptiveSizePausePolicy, 0,                                \
2106           "Policy for changing generation size for pause goals")            \
2107                                                                             \
2108   develop(bool, PSAdjustTenuredGenForMinorPause, false,                     \
2109           "Adjust tenured generation to achive a minor pause goal")         \
2110                                                                             \
2111   develop(bool, PSAdjustYoungGenForMajorPause, false,                       \
2112           "Adjust young generation to achive a major pause goal")           \
2113                                                                             \
2114   product(uintx, AdaptiveSizePolicyInitializingSteps, 20,                   \
2115           "Number of steps where heuristics is used before data is used")   \
2116                                                                             \
2117   develop(uintx, AdaptiveSizePolicyReadyThreshold, 5,                       \
2118           "Number of collections before the adaptive sizing is started")    \
2119                                                                             \
2120   product(uintx, AdaptiveSizePolicyOutputInterval, 0,                       \
2121           "Collecton interval for printing information; zero => never")     \
2122                                                                             \
2123   product(bool, UseAdaptiveSizePolicyFootprintGoal, true,                   \
2124           "Use adaptive minimum footprint as a goal")                       \
2125                                                                             \
2126   product(uintx, AdaptiveSizePolicyWeight, 10,                              \
2127           "Weight given to exponential resizing, between 0 and 100")        \
2128                                                                             \
2129   product(uintx, AdaptiveTimeWeight,       25,                              \
2130           "Weight given to time in adaptive policy, between 0 and 100")     \
2131                                                                             \
2132   product(uintx, PausePadding, 1,                                           \
2133           "How much buffer to keep for pause time")                         \
2134                                                                             \
2135   product(uintx, PromotedPadding, 3,                                        \
2136           "How much buffer to keep for promotion failure")                  \
2137                                                                             \
2138   product(uintx, SurvivorPadding, 3,                                        \
2139           "How much buffer to keep for survivor overflow")                  \
2140                                                                             \
2141   product(uintx, AdaptivePermSizeWeight, 20,                                \
2142           "Weight for perm gen exponential resizing, between 0 and 100")    \
2143                                                                             \
2144   product(uintx, PermGenPadding, 3,                                         \
2145           "How much buffer to keep for perm gen sizing")                    \
2146                                                                             \
2147   product(uintx, ThresholdTolerance, 10,                                    \
2148           "Allowed collection cost difference between generations")         \
2149                                                                             \
2150   product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50,                \
2151           "If collection costs are within margin, reduce both by full "     \
2152           "delta")                                                          \
2153                                                                             \
2154   product(uintx, YoungGenerationSizeIncrement, 20,                          \
2155           "Adaptive size percentage change in young generation")            \
2156                                                                             \
2157   product(uintx, YoungGenerationSizeSupplement, 80,                         \
2158           "Supplement to YoungedGenerationSizeIncrement used at startup")   \
2159                                                                             \
2160   product(uintx, YoungGenerationSizeSupplementDecay, 8,                     \
2161           "Decay factor to YoungedGenerationSizeSupplement")                \
2162                                                                             \
2163   product(uintx, TenuredGenerationSizeIncrement, 20,                        \
2164           "Adaptive size percentage change in tenured generation")          \
2165                                                                             \
2166   product(uintx, TenuredGenerationSizeSupplement, 80,                       \
2167           "Supplement to TenuredGenerationSizeIncrement used at startup")   \
2168                                                                             \
2169   product(uintx, TenuredGenerationSizeSupplementDecay, 2,                   \
2170           "Decay factor to TenuredGenerationSizeIncrement")                 \
2171                                                                             \
2172   product(uintx, MaxGCPauseMillis, max_uintx,                           \
2173           "Adaptive size policy maximum GC pause time goal in msec, "       \
2174           "or (G1 Only) the max. GC time per MMU time slice")               \
2175                                                                             \
2176   product(uintx, GCPauseIntervalMillis, 0,                                  \
2177           "Time slice for MMU specification")                               \
2178                                                                             \
2179   product(uintx, MaxGCMinorPauseMillis, max_uintx,                          \
2180           "Adaptive size policy maximum GC minor pause time goal in msec")  \
2181                                                                             \
2182   product(uintx, GCTimeRatio, 99,                                           \
2183           "Adaptive size policy application time to GC time ratio")         \
2184                                                                             \
2185   product(uintx, AdaptiveSizeDecrementScaleFactor, 4,                       \
2186           "Adaptive size scale down factor for shrinking")                  \
2187                                                                             \
2188   product(bool, UseAdaptiveSizeDecayMajorGCCost, true,                      \
2189           "Adaptive size decays the major cost for long major intervals")   \
2190                                                                             \
2191   product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10,                     \
2192           "Time scale over which major costs decay")                        \
2193                                                                             \
2194   product(uintx, MinSurvivorRatio, 3,                                       \
2195           "Minimum ratio of young generation/survivor space size")          \
2196                                                                             \
2197   product(uintx, InitialSurvivorRatio, 8,                                   \
2198           "Initial ratio of eden/survivor space size")                      \
2199                                                                             \
2200   product(uintx, BaseFootPrintEstimate, 256*M,                              \
2201           "Estimate of footprint other than Java Heap")                     \
2202                                                                             \
2203   product(bool, UseGCOverheadLimit, true,                                   \
2204           "Use policy to limit of proportion of time spent in GC "          \
2205           "before an OutOfMemory error is thrown")                          \
2206                                                                             \
2207   product(uintx, GCTimeLimit, 98,                                           \
2208           "Limit of proportion of time spent in GC before an OutOfMemory"   \
2209           "error is thrown (used with GCHeapFreeLimit)")                    \
2210                                                                             \
2211   product(uintx, GCHeapFreeLimit, 2,                                        \
2212           "Minimum percentage of free space after a full GC before an "     \
2213           "OutOfMemoryError is thrown (used with GCTimeLimit)")             \
2214                                                                             \
2215   develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5,                 \
2216           "Number of consecutive collections before gc time limit fires")   \
2217                                                                             \
2218   product(bool, PrintAdaptiveSizePolicy, false,                             \
2219           "Print information about AdaptiveSizePolicy")                     \
2220                                                                             \
2221   product(intx, PrefetchCopyIntervalInBytes, -1,                            \
2222           "How far ahead to prefetch destination area (<= 0 means off)")    \
2223                                                                             \
2224   product(intx, PrefetchScanIntervalInBytes, -1,                            \
2225           "How far ahead to prefetch scan area (<= 0 means off)")           \
2226                                                                             \
2227   product(intx, PrefetchFieldsAhead, -1,                                    \
2228           "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2229                                                                             \
2230   develop(bool, UsePrefetchQueue, true,                                     \
2231           "Use the prefetch queue during PS promotion")                     \
2232                                                                             \
2233   diagnostic(bool, VerifyBeforeExit, trueInDebug,                           \
2234           "Verify system before exiting")                                   \
2235                                                                             \
2236   diagnostic(bool, VerifyBeforeGC, false,                                   \
2237           "Verify memory system before GC")                                 \
2238                                                                             \
2239   diagnostic(bool, VerifyAfterGC, false,                                    \
2240           "Verify memory system after GC")                                  \
2241                                                                             \
2242   diagnostic(bool, VerifyDuringGC, false,                                   \
2243           "Verify memory system during GC (between phases)")                \
2244                                                                             \
2245   diagnostic(bool, GCParallelVerificationEnabled, true,                     \
2246           "Enable parallel memory system verification")                     \
2247                                                                             \
2248   diagnostic(bool, DeferInitialCardMark, false,                             \
2249           "When +ReduceInitialCardMarks, explicitly defer any that "        \
2250            "may arise from new_pre_store_barrier")                          \
2251                                                                             \
2252   diagnostic(bool, VerifyRememberedSets, false,                             \
2253           "Verify GC remembered sets")                                      \
2254                                                                             \
2255   diagnostic(bool, VerifyObjectStartArray, true,                            \
2256           "Verify GC object start array if verify before/after")            \
2257                                                                             \
2258   product(bool, DisableExplicitGC, false,                                   \
2259           "Tells whether calling System.gc() does a full GC")               \
2260                                                                             \
2261   notproduct(bool, CheckMemoryInitialization, false,                        \
2262           "Checks memory initialization")                                   \
2263                                                                             \
2264   product(bool, CollectGen0First, false,                                    \
2265           "Collect youngest generation before each full GC")                \
2266                                                                             \
2267   diagnostic(bool, BindCMSThreadToCPU, false,                               \
2268           "Bind CMS Thread to CPU if possible")                             \
2269                                                                             \
2270   diagnostic(uintx, CPUForCMSThread, 0,                                     \
2271           "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2272                                                                             \
2273   product(bool, BindGCTaskThreadsToCPUs, false,                             \
2274           "Bind GCTaskThreads to CPUs if possible")                         \
2275                                                                             \
2276   product(bool, UseGCTaskAffinity, false,                                   \
2277           "Use worker affinity when asking for GCTasks")                    \
2278                                                                             \
2279   product(uintx, ProcessDistributionStride, 4,                              \
2280           "Stride through processors when distributing processes")          \
2281                                                                             \
2282   product(uintx, CMSCoordinatorYieldSleepCount, 10,                         \
2283           "number of times the coordinator GC thread will sleep while "     \
2284           "yielding before giving up and resuming GC")                      \
2285                                                                             \
2286   product(uintx, CMSYieldSleepCount, 0,                                     \
2287           "number of times a GC thread (minus the coordinator) "            \
2288           "will sleep while yielding before giving up and resuming GC")     \
2289                                                                             \
2290   /* gc tracing */                                                          \
2291   manageable(bool, PrintGC, false,                                          \
2292           "Print message at garbage collect")                               \
2293                                                                             \
2294   manageable(bool, PrintGCDetails, false,                                   \
2295           "Print more details at garbage collect")                          \
2296                                                                             \
2297   manageable(bool, PrintGCDateStamps, false,                                \
2298           "Print date stamps at garbage collect")                           \
2299                                                                             \
2300   manageable(bool, PrintGCTimeStamps, false,                                \
2301           "Print timestamps at garbage collect")                            \
2302                                                                             \
2303   product(bool, PrintGCTaskTimeStamps, false,                               \
2304           "Print timestamps for individual gc worker thread tasks")         \
2305                                                                             \
2306   develop(intx, ConcGCYieldTimeout, 0,                                      \
2307           "If non-zero, assert that GC threads yield within this # of ms.") \
2308                                                                             \
2309   notproduct(bool, TraceMarkSweep, false,                                   \
2310           "Trace mark sweep")                                               \
2311                                                                             \
2312   product(bool, PrintReferenceGC, false,                                    \
2313           "Print times spent handling reference objects during GC "         \
2314           " (enabled only when PrintGCDetails)")                            \
2315                                                                             \
2316   develop(bool, TraceReferenceGC, false,                                    \
2317           "Trace handling of soft/weak/final/phantom references")           \
2318                                                                             \
2319   develop(bool, TraceFinalizerRegistration, false,                          \
2320          "Trace registration of final references")                          \
2321                                                                             \
2322   notproduct(bool, TraceScavenge, false,                                    \
2323           "Trace scavenge")                                                 \
2324                                                                             \
2325   product_rw(bool, TraceClassLoading, false,                                \
2326           "Trace all classes loaded")                                       \
2327                                                                             \
2328   product(bool, TraceClassLoadingPreorder, false,                           \
2329           "Trace all classes loaded in order referenced (not loaded)")      \
2330                                                                             \
2331   product_rw(bool, TraceClassUnloading, false,                              \
2332           "Trace unloading of classes")                                     \
2333                                                                             \
2334   product_rw(bool, TraceLoaderConstraints, false,                           \
2335           "Trace loader constraints")                                       \
2336                                                                             \
2337   product(bool, TraceGen0Time, false,                                       \
2338           "Trace accumulated time for Gen 0 collection")                    \
2339                                                                             \
2340   product(bool, TraceGen1Time, false,                                       \
2341           "Trace accumulated time for Gen 1 collection")                    \
2342                                                                             \
2343   product(bool, PrintTenuringDistribution, false,                           \
2344           "Print tenuring age information")                                 \
2345                                                                             \
2346   product_rw(bool, PrintHeapAtGC, false,                                    \
2347           "Print heap layout before and after each GC")                     \
2348                                                                             \
2349   product_rw(bool, PrintHeapAtGCExtended, false,                            \
2350           "Prints extended information about the layout of the heap "       \
2351           "when -XX:+PrintHeapAtGC is set")                                 \
2352                                                                             \
2353   product(bool, PrintHeapAtSIGBREAK, true,                                  \
2354           "Print heap layout in response to SIGBREAK")                      \
2355                                                                             \
2356   manageable(bool, PrintClassHistogramBeforeFullGC, false,                  \
2357           "Print a class histogram before any major stop-world GC")         \
2358                                                                             \
2359   manageable(bool, PrintClassHistogramAfterFullGC, false,                   \
2360           "Print a class histogram after any major stop-world GC")          \
2361                                                                             \
2362   manageable(bool, PrintClassHistogram, false,                              \
2363           "Print a histogram of class instances")                           \
2364                                                                             \
2365   develop(bool, TraceWorkGang, false,                                       \
2366           "Trace activities of work gangs")                                 \
2367                                                                             \
2368   product(bool, TraceParallelOldGCTasks, false,                             \
2369           "Trace multithreaded GC activity")                                \
2370                                                                             \
2371   develop(bool, TraceBlockOffsetTable, false,                               \
2372           "Print BlockOffsetTable maps")                                    \
2373                                                                             \
2374   develop(bool, TraceCardTableModRefBS, false,                              \
2375           "Print CardTableModRefBS maps")                                   \
2376                                                                             \
2377   develop(bool, TraceGCTaskManager, false,                                  \
2378           "Trace actions of the GC task manager")                           \
2379                                                                             \
2380   develop(bool, TraceGCTaskQueue, false,                                    \
2381           "Trace actions of the GC task queues")                            \
2382                                                                             \
2383   diagnostic(bool, TraceGCTaskThread, false,                                   \
2384           "Trace actions of the GC task threads")                           \
2385                                                                             \
2386   product(bool, PrintParallelOldGCPhaseTimes, false,                        \
2387           "Print the time taken by each parallel old gc phase."             \
2388           "PrintGCDetails must also be enabled.")                           \
2389                                                                             \
2390   develop(bool, TraceParallelOldGCMarkingPhase, false,                      \
2391           "Trace parallel old gc marking phase")                            \
2392                                                                             \
2393   develop(bool, TraceParallelOldGCSummaryPhase, false,                      \
2394           "Trace parallel old gc summary phase")                            \
2395                                                                             \
2396   develop(bool, TraceParallelOldGCCompactionPhase, false,                   \
2397           "Trace parallel old gc compaction phase")                         \
2398                                                                             \
2399   develop(bool, TraceParallelOldGCDensePrefix, false,                       \
2400           "Trace parallel old gc dense prefix computation")                 \
2401                                                                             \
2402   develop(bool, IgnoreLibthreadGPFault, false,                              \
2403           "Suppress workaround for libthread GP fault")                     \
2404                                                                             \
2405   product(bool, PrintJNIGCStalls, false,                                    \
2406           "Print diagnostic message when GC is stalled"                     \
2407           "by JNI critical section")                                        \
2408                                                                             \
2409   /* GC log rotation setting */                                             \
2410                                                                             \
2411   product(bool, UseGCLogFileRotation, false,                                \
2412           "Prevent large gclog file for long running app. "                 \
2413           "Requires -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, 0,                                          \
2420           "GC log file size, Default: 0 bytes, no rotation "                \
2421           "Only valid with UseGCLogFileRotation")                           \
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   develop(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, CITimeEach, false,                                          \
2447           "display timing information after each successful compilation")   \
2448                                                                             \
2449   develop(bool, CICountOSR, true,                                           \
2450           "use a separate counter when assigning ids to osr compilations")  \
2451                                                                             \
2452   develop(bool, CICompileNatives, true,                                     \
2453           "compile native methods if supported by the compiler")            \
2454                                                                             \
2455   develop_pd(bool, CICompileOSR,                                            \
2456           "compile on stack replacement methods if supported by the "       \
2457           "compiler")                                                       \
2458                                                                             \
2459   develop(bool, CIPrintMethodCodes, false,                                  \
2460           "print method bytecodes of the compiled code")                    \
2461                                                                             \
2462   develop(bool, CIPrintTypeFlow, false,                                     \
2463           "print the results of ciTypeFlow analysis")                       \
2464                                                                             \
2465   develop(bool, CITraceTypeFlow, false,                                     \
2466           "detailed per-bytecode tracing of ciTypeFlow analysis")           \
2467                                                                             \
2468   develop(intx, CICloneLoopTestLimit, 100,                                  \
2469           "size limit for blocks heuristically cloned in ciTypeFlow")       \
2470                                                                             \
2471   develop(intx, OSROnlyBCI, -1,                                             \
2472           "OSR only at this bci.  Negative values mean exclude that bci")   \
2473                                                                             \
2474   /* temp diagnostics */                                                    \
2475                                                                             \
2476   diagnostic(bool, TraceRedundantCompiles, false,                           \
2477           "Have compile broker print when a request already in the queue is"\
2478           " requested again")                                               \
2479                                                                             \
2480   diagnostic(bool, InitialCompileFast, false,                               \
2481           "Initial compile at CompLevel_fast_compile")                      \
2482                                                                             \
2483   diagnostic(bool, InitialCompileReallyFast, false,                         \
2484           "Initial compile at CompLevel_really_fast_compile (no profile)")  \
2485                                                                             \
2486   diagnostic(bool, FullProfileOnReInterpret, true,                          \
2487           "On re-interpret unc-trap compile next at CompLevel_fast_compile")\
2488                                                                             \
2489   /* compiler */                                                            \
2490                                                                             \
2491   product(intx, CICompilerCount, CI_COMPILER_COUNT,                         \
2492           "Number of compiler threads to run")                              \
2493                                                                             \
2494   product(intx, CompilationPolicyChoice, 0,                                 \
2495           "which compilation policy (0/1)")                                 \
2496                                                                             \
2497   develop(bool, UseStackBanging, true,                                      \
2498           "use stack banging for stack overflow checks (required for "      \
2499           "proper StackOverflow handling; disable only to measure cost "    \
2500           "of stackbanging)")                                               \
2501                                                                             \
2502   develop(bool, Use24BitFPMode, true,                                       \
2503           "Set 24-bit FPU mode on a per-compile basis ")                    \
2504                                                                             \
2505   develop(bool, Use24BitFP, true,                                           \
2506           "use FP instructions that produce 24-bit precise results")        \
2507                                                                             \
2508   develop(bool, UseStrictFP, true,                                          \
2509           "use strict fp if modifier strictfp is set")                      \
2510                                                                             \
2511   develop(bool, GenerateSynchronizationCode, true,                          \
2512           "generate locking/unlocking code for synchronized methods and "   \
2513           "monitors")                                                       \
2514                                                                             \
2515   develop(bool, GenerateCompilerNullChecks, true,                           \
2516           "Generate explicit null checks for loads/stores/calls")           \
2517                                                                             \
2518   develop(bool, GenerateRangeChecks, true,                                  \
2519           "Generate range checks for array accesses")                       \
2520                                                                             \
2521   develop_pd(bool, ImplicitNullChecks,                                      \
2522           "generate code for implicit null checks")                         \
2523                                                                             \
2524   product(bool, PrintSafepointStatistics, false,                            \
2525           "print statistics about safepoint synchronization")               \
2526                                                                             \
2527   product(intx, PrintSafepointStatisticsCount, 300,                         \
2528           "total number of safepoint statistics collected "                 \
2529           "before printing them out")                                       \
2530                                                                             \
2531   product(intx, PrintSafepointStatisticsTimeout,  -1,                       \
2532           "print safepoint statistics only when safepoint takes"            \
2533           " more than PrintSafepointSatisticsTimeout in millis")            \
2534                                                                             \
2535   product(bool, TraceSafepointCleanupTime, false,                           \
2536           "print the break down of clean up tasks performed during"         \
2537           " safepoint")                                                     \
2538                                                                             \
2539   develop(bool, InlineAccessors, true,                                      \
2540           "inline accessor methods (get/set)")                              \
2541                                                                             \
2542   product(bool, Inline, true,                                               \
2543           "enable inlining")                                                \
2544                                                                             \
2545   product(bool, ClipInlining, true,                                         \
2546           "clip inlining if aggregate method exceeds DesiredMethodLimit")   \
2547                                                                             \
2548   develop(bool, UseCHA, true,                                               \
2549           "enable CHA")                                                     \
2550                                                                             \
2551   product(bool, UseTypeProfile, true,                                       \
2552           "Check interpreter profile for historically monomorphic calls")   \
2553                                                                             \
2554   product(intx, TypeProfileMajorReceiverPercent, 90,                        \
2555           "% of major receiver type to all profiled receivers")             \
2556                                                                             \
2557   notproduct(bool, TimeCompiler, false,                                     \
2558           "time the compiler")                                              \
2559                                                                             \
2560   notproduct(bool, TimeCompiler2, false,                                    \
2561           "detailed time the compiler (requires +TimeCompiler)")            \
2562                                                                             \
2563   diagnostic(bool, PrintInlining, false,                                    \
2564           "prints inlining optimizations")                                  \
2565                                                                             \
2566   diagnostic(bool, PrintIntrinsics, false,                                  \
2567           "prints attempted and successful inlining of intrinsics")         \
2568                                                                             \
2569   product(bool, UseCountLeadingZerosInstruction, false,                     \
2570           "Use count leading zeros instruction")                            \
2571                                                                             \
2572   product(bool, UsePopCountInstruction, false,                              \
2573           "Use population count instruction")                               \
2574                                                                             \
2575   diagnostic(ccstrlist, DisableIntrinsic, "",                               \
2576           "do not expand intrinsics whose (internal) names appear here")    \
2577                                                                             \
2578   develop(bool, StressReflectiveCode, false,                                \
2579           "Use inexact types at allocations, etc., to test reflection")     \
2580                                                                             \
2581   develop(bool, EagerInitialization, false,                                 \
2582           "Eagerly initialize classes if possible")                         \
2583                                                                             \
2584   develop(bool, TraceMethodReplacement, false,                              \
2585           "Print when methods are replaced do to recompilation")            \
2586                                                                             \
2587   develop(bool, PrintMethodFlushing, false,                                 \
2588           "print the nmethods being flushed")                               \
2589                                                                             \
2590   notproduct(bool, LogMultipleMutexLocking, false,                          \
2591           "log locking and unlocking of mutexes (only if multiple locks "   \
2592           "are held)")                                                      \
2593                                                                             \
2594   develop(bool, UseRelocIndex, false,                                       \
2595          "use an index to speed random access to relocations")              \
2596                                                                             \
2597   develop(bool, StressCodeBuffers, false,                                   \
2598          "Exercise code buffer expansion and other rare state changes")     \
2599                                                                             \
2600   diagnostic(bool, DebugNonSafepoints, trueInDebug,                         \
2601          "Generate extra debugging info for non-safepoints in nmethods")    \
2602                                                                             \
2603   diagnostic(bool, DebugInlinedCalls, true,                                 \
2604          "If false, restricts profiled locations to the root method only")  \
2605                                                                             \
2606   product(bool, PrintVMOptions, false,                                      \
2607          "Print flags that appeared on the command line")                   \
2608                                                                             \
2609   product(bool, IgnoreUnrecognizedVMOptions, false,                         \
2610          "Ignore unrecognized VM options")                                  \
2611                                                                             \
2612   product(bool, PrintCommandLineFlags, false,                               \
2613          "Print flags specified on command line or set by ergonomics")      \
2614                                                                             \
2615   product(bool, PrintFlagsInitial, false,                                   \
2616          "Print all VM flags before argument processing and exit VM")       \
2617                                                                             \
2618   product(bool, PrintFlagsFinal, false,                                     \
2619          "Print all VM flags after argument and ergonomic processing")      \
2620                                                                             \
2621   notproduct(bool, PrintFlagsWithComments, false,                           \
2622          "Print all VM flags with default values and descriptions and exit")\
2623                                                                             \
2624   diagnostic(bool, SerializeVMOutput, true,                                 \
2625          "Use a mutex to serialize output to tty and hotspot.log")          \
2626                                                                             \
2627   diagnostic(bool, DisplayVMOutput, true,                                   \
2628          "Display all VM output on the tty, independently of LogVMOutput")  \
2629                                                                             \
2630   diagnostic(bool, LogVMOutput, trueInDebug,                                \
2631          "Save VM output to hotspot.log, or to LogFile")                    \
2632                                                                             \
2633   diagnostic(ccstr, LogFile, NULL,                                          \
2634          "If LogVMOutput is on, save VM output to this file [hotspot.log]") \
2635                                                                             \
2636   product(ccstr, ErrorFile, NULL,                                           \
2637          "If an error occurs, save the error data to this file "            \
2638          "[default: ./hs_err_pid%p.log] (%p replaced with pid)")            \
2639                                                                             \
2640   product(bool, DisplayVMOutputToStderr, false,                             \
2641          "If DisplayVMOutput is true, display all VM output to stderr")     \
2642                                                                             \
2643   product(bool, DisplayVMOutputToStdout, false,                             \
2644          "If DisplayVMOutput is true, display all VM output to stdout")     \
2645                                                                             \
2646   product(bool, UseHeavyMonitors, false,                                    \
2647           "use heavyweight instead of lightweight Java monitors")           \
2648                                                                             \
2649   notproduct(bool, PrintSymbolTableSizeHistogram, false,                    \
2650           "print histogram of the symbol table")                            \
2651                                                                             \
2652   notproduct(bool, ExitVMOnVerifyError, false,                              \
2653           "standard exit from VM if bytecode verify error "                 \
2654           "(only in debug mode)")                                           \
2655                                                                             \
2656   notproduct(ccstr, AbortVMOnException, NULL,                               \
2657           "Call fatal if this exception is thrown.  Example: "              \
2658           "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2659                                                                             \
2660   notproduct(ccstr, AbortVMOnExceptionMessage, NULL,                        \
2661           "Call fatal if the exception pointed by AbortVMOnException "      \
2662           "has this message.")                                              \
2663                                                                             \
2664   develop(bool, DebugVtables, false,                                        \
2665           "add debugging code to vtable dispatch")                          \
2666                                                                             \
2667   develop(bool, PrintVtables, false,                                        \
2668           "print vtables when printing klass")                              \
2669                                                                             \
2670   notproduct(bool, PrintVtableStats, false,                                 \
2671           "print vtables stats at end of run")                              \
2672                                                                             \
2673   develop(bool, TraceCreateZombies, false,                                  \
2674           "trace creation of zombie nmethods")                              \
2675                                                                             \
2676   notproduct(bool, IgnoreLockingAssertions, false,                          \
2677           "disable locking assertions (for speed)")                         \
2678                                                                             \
2679   notproduct(bool, VerifyLoopOptimizations, false,                          \
2680           "verify major loop optimizations")                                \
2681                                                                             \
2682   product(bool, RangeCheckElimination, true,                                \
2683           "Split loop iterations to eliminate range checks")                \
2684                                                                             \
2685   develop_pd(bool, UncommonNullCast,                                        \
2686           "track occurrences of null in casts; adjust compiler tactics")    \
2687                                                                             \
2688   develop(bool, TypeProfileCasts,  true,                                    \
2689           "treat casts like calls for purposes of type profiling")          \
2690                                                                             \
2691   develop(bool, MonomorphicArrayCheck, true,                                \
2692           "Uncommon-trap array store checks that require full type check")  \
2693                                                                             \
2694   diagnostic(bool, ProfileDynamicTypes, true,                               \
2695           "do extra type profiling and use it more aggressively")           \
2696                                                                             \
2697   develop(bool, DelayCompilationDuringStartup, true,                        \
2698           "Delay invoking the compiler until main application class is "    \
2699           "loaded")                                                         \
2700                                                                             \
2701   develop(bool, CompileTheWorld, false,                                     \
2702           "Compile all methods in all classes in bootstrap class path "     \
2703           "(stress test)")                                                  \
2704                                                                             \
2705   develop(bool, CompileTheWorldPreloadClasses, true,                        \
2706           "Preload all classes used by a class before start loading")       \
2707                                                                             \
2708   notproduct(intx, CompileTheWorldSafepointInterval, 100,                   \
2709           "Force a safepoint every n compiles so sweeper can keep up")      \
2710                                                                             \
2711   develop(bool, TraceIterativeGVN, false,                                   \
2712           "Print progress during Iterative Global Value Numbering")         \
2713                                                                             \
2714   develop(bool, FillDelaySlots, true,                                       \
2715           "Fill delay slots (on SPARC only)")                               \
2716                                                                             \
2717   develop(bool, VerifyIterativeGVN, false,                                  \
2718           "Verify Def-Use modifications during sparse Iterative Global "    \
2719           "Value Numbering")                                                \
2720                                                                             \
2721   notproduct(bool, TracePhaseCCP, false,                                    \
2722           "Print progress during Conditional Constant Propagation")         \
2723                                                                             \
2724   develop(bool, TimeLivenessAnalysis, false,                                \
2725           "Time computation of bytecode liveness analysis")                 \
2726                                                                             \
2727   develop(bool, TraceLivenessGen, false,                                    \
2728           "Trace the generation of liveness analysis information")          \
2729                                                                             \
2730   notproduct(bool, TraceLivenessQuery, false,                               \
2731           "Trace queries of liveness analysis information")                 \
2732                                                                             \
2733   notproduct(bool, CollectIndexSetStatistics, false,                        \
2734           "Collect information about IndexSets")                            \
2735                                                                             \
2736   develop(bool, PrintDominators, false,                                     \
2737           "Print out dominator trees for GVN")                              \
2738                                                                             \
2739   develop(bool, UseLoopSafepoints, true,                                    \
2740           "Generate Safepoint nodes in every loop")                         \
2741                                                                             \
2742   notproduct(bool, TraceCISCSpill, false,                                   \
2743           "Trace allocators use of cisc spillable instructions")            \
2744                                                                             \
2745   notproduct(bool, TraceSpilling, false,                                    \
2746           "Trace spilling")                                                 \
2747                                                                             \
2748   product(bool, SplitIfBlocks, true,                                        \
2749           "Clone compares and control flow through merge points to fold "   \
2750           "some branches")                                                  \
2751                                                                             \
2752   develop(intx, FastAllocateSizeLimit, 128*K,                               \
2753           /* Note:  This value is zero mod 1<<13 for a cheap sparc set. */  \
2754           "Inline allocations larger than this in doublewords must go slow")\
2755                                                                             \
2756   product(bool, AggressiveOpts, false,                                      \
2757           "Enable aggressive optimizations - see arguments.cpp")            \
2758                                                                             \
2759   product(bool, UseStringCache, false,                                      \
2760           "Enable String cache capabilities on String.java")                \
2761                                                                             \
2762   /* statistics */                                                          \
2763   develop(bool, CountCompiledCalls, false,                                  \
2764           "counts method invocations")                                      \
2765                                                                             \
2766   notproduct(bool, CountRuntimeCalls, false,                                \
2767           "counts VM runtime calls")                                        \
2768                                                                             \
2769   develop(bool, CountJNICalls, false,                                       \
2770           "counts jni method invocations")                                  \
2771                                                                             \
2772   notproduct(bool, CountJVMCalls, false,                                    \
2773           "counts jvm method invocations")                                  \
2774                                                                             \
2775   notproduct(bool, CountRemovableExceptions, false,                         \
2776           "count exceptions that could be replaced by branches due to "     \
2777           "inlining")                                                       \
2778                                                                             \
2779   notproduct(bool, ICMissHistogram, false,                                  \
2780           "produce histogram of IC misses")                                 \
2781                                                                             \
2782   notproduct(bool, PrintClassStatistics, false,                             \
2783           "prints class statistics at end of run")                          \
2784                                                                             \
2785   notproduct(bool, PrintMethodStatistics, false,                            \
2786           "prints method statistics at end of run")                         \
2787                                                                             \
2788   /* interpreter */                                                         \
2789   develop(bool, ClearInterpreterLocals, false,                              \
2790           "Always clear local variables of interpreter activations upon "   \
2791           "entry")                                                          \
2792                                                                             \
2793   product_pd(bool, RewriteBytecodes,                                        \
2794           "Allow rewriting of bytecodes (bytecodes are not immutable)")     \
2795                                                                             \
2796   product_pd(bool, RewriteFrequentPairs,                                    \
2797           "Rewrite frequently used bytecode pairs into a single bytecode")  \
2798                                                                             \
2799   diagnostic(bool, PrintInterpreter, false,                                 \
2800           "Prints the generated interpreter code")                          \
2801                                                                             \
2802   product(bool, UseInterpreter, true,                                       \
2803           "Use interpreter for non-compiled methods")                       \
2804                                                                             \
2805   develop(bool, UseFastSignatureHandlers, true,                             \
2806           "Use fast signature handlers for native calls")                   \
2807                                                                             \
2808   develop(bool, UseV8InstrsOnly, false,                                     \
2809           "Use SPARC-V8 Compliant instruction subset")                      \
2810                                                                             \
2811   product(bool, UseNiagaraInstrs, false,                                    \
2812           "Use Niagara-efficient instruction subset")                       \
2813                                                                             \
2814   develop(bool, UseCASForSwap, false,                                       \
2815           "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
2816                                                                             \
2817   product(bool, UseLoopCounter, true,                                       \
2818           "Increment invocation counter on backward branch")                \
2819                                                                             \
2820   product(bool, UseFastEmptyMethods, true,                                  \
2821           "Use fast method entry code for empty methods")                   \
2822                                                                             \
2823   product(bool, UseFastAccessorMethods, true,                               \
2824           "Use fast method entry code for accessor methods")                \
2825                                                                             \
2826   product_pd(bool, UseOnStackReplacement,                                   \
2827            "Use on stack replacement, calls runtime if invoc. counter "     \
2828            "overflows in loop")                                             \
2829                                                                             \
2830   notproduct(bool, TraceOnStackReplacement, false,                          \
2831           "Trace on stack replacement")                                     \
2832                                                                             \
2833   develop(bool, PoisonOSREntry, true,                                       \
2834            "Detect abnormal calls to OSR code")                             \
2835                                                                             \
2836   product_pd(bool, PreferInterpreterNativeStubs,                            \
2837           "Use always interpreter stubs for native methods invoked via "    \
2838           "interpreter")                                                    \
2839                                                                             \
2840   develop(bool, CountBytecodes, false,                                      \
2841           "Count number of bytecodes executed")                             \
2842                                                                             \
2843   develop(bool, PrintBytecodeHistogram, false,                              \
2844           "Print histogram of the executed bytecodes")                      \
2845                                                                             \
2846   develop(bool, PrintBytecodePairHistogram, false,                          \
2847           "Print histogram of the executed bytecode pairs")                 \
2848                                                                             \
2849   diagnostic(bool, PrintSignatureHandlers, false,                           \
2850           "Print code generated for native method signature handlers")      \
2851                                                                             \
2852   develop(bool, VerifyOops, false,                                          \
2853           "Do plausibility checks for oops")                                \
2854                                                                             \
2855   develop(bool, CheckUnhandledOops, false,                                  \
2856           "Check for unhandled oops in VM code")                            \
2857                                                                             \
2858   develop(bool, VerifyJNIFields, trueInDebug,                               \
2859           "Verify jfieldIDs for instance fields")                           \
2860                                                                             \
2861   notproduct(bool, VerifyJNIEnvThread, false,                               \
2862           "Verify JNIEnv.thread == Thread::current() when entering VM "     \
2863           "from JNI")                                                       \
2864                                                                             \
2865   develop(bool, VerifyFPU, false,                                           \
2866           "Verify FPU state (check for NaN's, etc.)")                       \
2867                                                                             \
2868   develop(bool, VerifyThread, false,                                        \
2869           "Watch the thread register for corruption (SPARC only)")          \
2870                                                                             \
2871   develop(bool, VerifyActivationFrameSize, false,                           \
2872           "Verify that activation frame didn't become smaller than its "    \
2873           "minimal size")                                                   \
2874                                                                             \
2875   develop(bool, TraceFrequencyInlining, false,                              \
2876           "Trace frequency based inlining")                                 \
2877                                                                             \
2878   notproduct(bool, TraceTypeProfile, false,                                 \
2879           "Trace type profile")                                             \
2880                                                                             \
2881   develop_pd(bool, InlineIntrinsics,                                        \
2882            "Inline intrinsics that can be statically resolved")             \
2883                                                                             \
2884   product_pd(bool, ProfileInterpreter,                                      \
2885            "Profile at the bytecode level during interpretation")           \
2886                                                                             \
2887   develop_pd(bool, ProfileTraps,                                            \
2888           "Profile deoptimization traps at the bytecode level")             \
2889                                                                             \
2890   product(intx, ProfileMaturityPercentage, 20,                              \
2891           "number of method invocations/branches (expressed as % of "       \
2892           "CompileThreshold) before using the method's profile")            \
2893                                                                             \
2894   develop(bool, PrintMethodData, false,                                     \
2895            "Print the results of +ProfileInterpreter at end of run")        \
2896                                                                             \
2897   develop(bool, VerifyDataPointer, trueInDebug,                             \
2898           "Verify the method data pointer during interpreter profiling")    \
2899                                                                             \
2900   develop(bool, VerifyCompiledCode, false,                                  \
2901           "Include miscellaneous runtime verifications in nmethod code; "   \
2902           "default off because it disturbs nmethod size heuristics")        \
2903                                                                             \
2904   notproduct(bool, CrashGCForDumpingJavaThread, false,                      \
2905           "Manually make GC thread crash then dump java stack trace;  "     \
2906           "Test only")                                                      \
2907                                                                             \
2908   /* compilation */                                                         \
2909   product(bool, UseCompiler, true,                                          \
2910           "use compilation")                                                \
2911                                                                             \
2912   develop(bool, TraceCompilationPolicy, false,                              \
2913           "Trace compilation policy")                                       \
2914                                                                             \
2915   develop(bool, TimeCompilationPolicy, false,                               \
2916           "Time the compilation policy")                                    \
2917                                                                             \
2918   product(bool, UseCounterDecay, true,                                      \
2919            "adjust recompilation counters")                                 \
2920                                                                             \
2921   develop(intx, CounterHalfLifeTime,    30,                                 \
2922           "half-life time of invocation counters (in secs)")                \
2923                                                                             \
2924   develop(intx, CounterDecayMinIntervalLength,   500,                       \
2925           "Min. ms. between invocation of CounterDecay")                    \
2926                                                                             \
2927   product(bool, AlwaysCompileLoopMethods, false,                            \
2928           "when using recompilation, never interpret methods "              \
2929           "containing loops")                                               \
2930                                                                             \
2931   product(bool, DontCompileHugeMethods, true,                               \
2932           "don't compile methods > HugeMethodLimit")                        \
2933                                                                             \
2934   /* Bytecode escape analysis estimation. */                                \
2935   product(bool, EstimateArgEscape, true,                                    \
2936           "Analyze bytecodes to estimate escape state of arguments")        \
2937                                                                             \
2938   product(intx, BCEATraceLevel, 0,                                          \
2939           "How much tracing to do of bytecode escape analysis estimates")   \
2940                                                                             \
2941   product(intx, MaxBCEAEstimateLevel, 5,                                    \
2942           "Maximum number of nested calls that are analyzed by BC EA.")     \
2943                                                                             \
2944   product(intx, MaxBCEAEstimateSize, 150,                                   \
2945           "Maximum bytecode size of a method to be analyzed by BC EA.")     \
2946                                                                             \
2947   product(intx,  AllocatePrefetchStyle, 1,                                  \
2948           "0 = no prefetch, "                                               \
2949           "1 = prefetch instructions for each allocation, "                 \
2950           "2 = use TLAB watermark to gate allocation prefetch, "            \
2951           "3 = use BIS instruction on Sparc for allocation prefetch")       \
2952                                                                             \
2953   product(intx,  AllocatePrefetchDistance, -1,                              \
2954           "Distance to prefetch ahead of allocation pointer")               \
2955                                                                             \
2956   product(intx,  AllocatePrefetchLines, 3,                                  \
2957           "Number of lines to prefetch ahead of array allocation pointer")  \
2958                                                                             \
2959   product(intx,  AllocateInstancePrefetchLines, 1,                          \
2960           "Number of lines to prefetch ahead of instance allocation pointer") \
2961                                                                             \
2962   product(intx,  AllocatePrefetchStepSize, 16,                              \
2963           "Step size in bytes of sequential prefetch instructions")         \
2964                                                                             \
2965   product(intx,  AllocatePrefetchInstr, 0,                                  \
2966           "Prefetch instruction to prefetch ahead of allocation pointer")   \
2967                                                                             \
2968   product(intx,  ReadPrefetchInstr, 0,                                      \
2969           "Prefetch instruction to prefetch ahead")                         \
2970                                                                             \
2971   product(uintx,  ArraycopySrcPrefetchDistance, 0,                          \
2972           "Distance to prefetch source array in arracopy")                  \
2973                                                                             \
2974   product(uintx,  ArraycopyDstPrefetchDistance, 0,                          \
2975           "Distance to prefetch destination array in arracopy")             \
2976                                                                             \
2977   /* deoptimization */                                                      \
2978   develop(bool, TraceDeoptimization, false,                                 \
2979           "Trace deoptimization")                                           \
2980                                                                             \
2981   develop(bool, DebugDeoptimization, false,                                 \
2982           "Tracing various information while debugging deoptimization")     \
2983                                                                             \
2984   product(intx, SelfDestructTimer, 0,                                       \
2985           "Will cause VM to terminate after a given time (in minutes) "     \
2986           "(0 means off)")                                                  \
2987                                                                             \
2988   product(intx, MaxJavaStackTraceDepth, 1024,                               \
2989           "Max. no. of lines in the stack trace for Java exceptions "       \
2990           "(0 means all)")                                                  \
2991                                                                             \
2992   NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000,          \
2993           "Guarantee a safepoint (at least) every so many milliseconds "    \
2994           "(0 means none)"))                                                \
2995                                                                             \
2996   EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0,               \
2997           "Guarantee a safepoint (at least) every so many milliseconds "    \
2998           "(0 means none)"))                                                \
2999                                                                             \
3000   product(intx, SafepointTimeoutDelay, 10000,                               \
3001           "Delay in milliseconds for option SafepointTimeout")              \
3002                                                                             \
3003   product(intx, NmethodSweepFraction, 4,                                    \
3004           "Number of invocations of sweeper to cover all nmethods")         \
3005                                                                             \
3006   product(intx, NmethodSweepCheckInterval, 5,                               \
3007           "Compilers wake up every n seconds to possibly sweep nmethods")   \
3008                                                                             \
3009   notproduct(bool, LogSweeper, false,                                       \
3010             "Keep a ring buffer of sweeper activity")                       \
3011                                                                             \
3012   notproduct(intx, SweeperLogEntries, 1024,                                 \
3013             "Number of records in the ring buffer of sweeper activity")     \
3014                                                                             \
3015   notproduct(intx, MemProfilingInterval, 500,                               \
3016           "Time between each invocation of the MemProfiler")                \
3017                                                                             \
3018   develop(intx, MallocCatchPtr, -1,                                         \
3019           "Hit breakpoint when mallocing/freeing this pointer")             \
3020                                                                             \
3021   notproduct(intx, AssertRepeat, 1,                                         \
3022           "number of times to evaluate expression in assert "               \
3023           "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
3024                                                                             \
3025   notproduct(ccstrlist, SuppressErrorAt, "",                                \
3026           "List of assertions (file:line) to muzzle")                       \
3027                                                                             \
3028   notproduct(uintx, HandleAllocationLimit, 1024,                            \
3029           "Threshold for HandleMark allocation when +TraceHandleAllocation "\
3030           "is used")                                                        \
3031                                                                             \
3032   develop(uintx, TotalHandleAllocationLimit, 1024,                          \
3033           "Threshold for total handle allocation when "                     \
3034           "+TraceHandleAllocation is used")                                 \
3035                                                                             \
3036   develop(intx, StackPrintLimit, 100,                                       \
3037           "number of stack frames to print in VM-level stack dump")         \
3038                                                                             \
3039   notproduct(intx, MaxElementPrintSize, 256,                                \
3040           "maximum number of elements to print")                            \
3041                                                                             \
3042   notproduct(intx, MaxSubklassPrintSize, 4,                                 \
3043           "maximum number of subklasses to print when printing klass")      \
3044                                                                             \
3045   product(intx, MaxInlineLevel, 9,                                          \
3046           "maximum number of nested calls that are inlined")                \
3047                                                                             \
3048   product(intx, MaxRecursiveInlineLevel, 1,                                 \
3049           "maximum number of nested recursive calls that are inlined")      \
3050                                                                             \
3051   product_pd(intx, InlineSmallCode,                                         \
3052           "Only inline already compiled methods if their code size is "     \
3053           "less than this")                                                 \
3054                                                                             \
3055   product(intx, MaxInlineSize, 35,                                          \
3056           "maximum bytecode size of a method to be inlined")                \
3057                                                                             \
3058   product_pd(intx, FreqInlineSize,                                          \
3059           "maximum bytecode size of a frequent method to be inlined")       \
3060                                                                             \
3061   product(intx, MaxTrivialSize, 6,                                          \
3062           "maximum bytecode size of a trivial method to be inlined")        \
3063                                                                             \
3064   product(intx, MinInliningThreshold, 250,                                  \
3065           "min. invocation count a method needs to have to be inlined")     \
3066                                                                             \
3067   develop(intx, AlignEntryCode, 4,                                          \
3068           "aligns entry code to specified value (in bytes)")                \
3069                                                                             \
3070   develop(intx, MethodHistogramCutoff, 100,                                 \
3071           "cutoff value for method invoc. histogram (+CountCalls)")         \
3072                                                                             \
3073   develop(intx, ProfilerNumberOfInterpretedMethods, 25,                     \
3074           "# of interpreted methods to show in profile")                    \
3075                                                                             \
3076   develop(intx, ProfilerNumberOfCompiledMethods, 25,                        \
3077           "# of compiled methods to show in profile")                       \
3078                                                                             \
3079   develop(intx, ProfilerNumberOfStubMethods, 25,                            \
3080           "# of stub methods to show in profile")                           \
3081                                                                             \
3082   develop(intx, ProfilerNumberOfRuntimeStubNodes, 25,                       \
3083           "# of runtime stub nodes to show in profile")                     \
3084                                                                             \
3085   product(intx, ProfileIntervalsTicks, 100,                                 \
3086           "# of ticks between printing of interval profile "                \
3087           "(+ProfileIntervals)")                                            \
3088                                                                             \
3089   notproduct(intx, ScavengeALotInterval,     1,                             \
3090           "Interval between which scavenge will occur with +ScavengeALot")  \
3091                                                                             \
3092   notproduct(intx, FullGCALotInterval,     1,                               \
3093           "Interval between which full gc will occur with +FullGCALot")     \
3094                                                                             \
3095   notproduct(intx, FullGCALotStart,     0,                                  \
3096           "For which invocation to start FullGCAlot")                       \
3097                                                                             \
3098   notproduct(intx, FullGCALotDummies,  32*K,                                \
3099           "Dummy object allocated with +FullGCALot, forcing all objects "   \
3100           "to move")                                                        \
3101                                                                             \
3102   develop(intx, DontYieldALotInterval,    10,                               \
3103           "Interval between which yields will be dropped (milliseconds)")   \
3104                                                                             \
3105   develop(intx, MinSleepInterval,     1,                                    \
3106           "Minimum sleep() interval (milliseconds) when "                   \
3107           "ConvertSleepToYield is off (used for SOLARIS)")                  \
3108                                                                             \
3109   product(intx, EventLogLength,  2000,                                      \
3110           "maximum nof events in event log")                                \
3111                                                                             \
3112   develop(intx, ProfilerPCTickThreshold,    15,                             \
3113           "Number of ticks in a PC buckets to be a hotspot")                \
3114                                                                             \
3115   notproduct(intx, DeoptimizeALotInterval,     5,                           \
3116           "Number of exits until DeoptimizeALot kicks in")                  \
3117                                                                             \
3118   notproduct(intx, ZombieALotInterval,     5,                               \
3119           "Number of exits until ZombieALot kicks in")                      \
3120                                                                             \
3121   develop(bool, StressNonEntrant, false,                                    \
3122           "Mark nmethods non-entrant at registration")                      \
3123                                                                             \
3124   diagnostic(intx, MallocVerifyInterval,     0,                             \
3125           "if non-zero, verify C heap after every N calls to "              \
3126           "malloc/realloc/free")                                            \
3127                                                                             \
3128   diagnostic(intx, MallocVerifyStart,     0,                                \
3129           "if non-zero, start verifying C heap after Nth call to "          \
3130           "malloc/realloc/free")                                            \
3131                                                                             \
3132   product(intx, TypeProfileWidth,     2,                                   \
3133           "number of receiver types to record in call/cast profile")        \
3134                                                                             \
3135   develop(intx, BciProfileWidth,      2,                                    \
3136           "number of return bci's to record in ret profile")                \
3137                                                                             \
3138   product(intx, PerMethodRecompilationCutoff, 400,                          \
3139           "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3140                                                                             \
3141   product(intx, PerBytecodeRecompilationCutoff, 200,                        \
3142           "Per-BCI limit on repeated recompilation (-1=>'Inf')")            \
3143                                                                             \
3144   product(intx, PerMethodTrapLimit,  100,                                   \
3145           "Limit on traps (of one kind) in a method (includes inlines)")    \
3146                                                                             \
3147   product(intx, PerBytecodeTrapLimit,  4,                                   \
3148           "Limit on traps (of one kind) at a particular BCI")               \
3149                                                                             \
3150   develop(intx, FreqCountInvocations,  1,                                   \
3151           "Scaling factor for branch frequencies (deprecated)")             \
3152                                                                             \
3153   develop(intx, InlineFrequencyRatio,    20,                                \
3154           "Ratio of call site execution to caller method invocation")       \
3155                                                                             \
3156   develop_pd(intx, InlineFrequencyCount,                                    \
3157           "Count of call site execution necessary to trigger frequent "     \
3158           "inlining")                                                       \
3159                                                                             \
3160   develop(intx, InlineThrowCount,    50,                                    \
3161           "Force inlining of interpreted methods that throw this often")    \
3162                                                                             \
3163   develop(intx, InlineThrowMaxSize,   200,                                  \
3164           "Force inlining of throwing methods smaller than this")           \
3165                                                                             \
3166   product(intx, AliasLevel,     3,                                          \
3167           "0 for no aliasing, 1 for oop/field/static/array split, "         \
3168           "2 for class split, 3 for unique instances")                      \
3169                                                                             \
3170   develop(bool, VerifyAliases, false,                                       \
3171           "perform extra checks on the results of alias analysis")          \
3172                                                                             \
3173   develop(intx, ProfilerNodeSize,  1024,                                    \
3174           "Size in K to allocate for the Profile Nodes of each thread")     \
3175                                                                             \
3176   develop(intx, V8AtomicOperationUnderLockSpinCount,    50,                 \
3177           "Number of times to spin wait on a v8 atomic operation lock")     \
3178                                                                             \
3179   product(intx, ReadSpinIterations,   100,                                  \
3180           "Number of read attempts before a yield (spin inner loop)")       \
3181                                                                             \
3182   product_pd(intx, PreInflateSpin,                                          \
3183           "Number of times to spin wait before inflation")                  \
3184                                                                             \
3185   product(intx, PreBlockSpin,    10,                                        \
3186           "Number of times to spin in an inflated lock before going to "    \
3187           "an OS lock")                                                     \
3188                                                                             \
3189   /* gc parameters */                                                       \
3190   product(uintx, InitialHeapSize, 0,                                        \
3191           "Initial heap size (in bytes); zero means OldSize + NewSize")     \
3192                                                                             \
3193   product(uintx, MaxHeapSize, ScaleForWordSize(96*M),                       \
3194           "Maximum heap size (in bytes)")                                   \
3195                                                                             \
3196   product(uintx, OldSize, ScaleForWordSize(4*M),                            \
3197           "Initial tenured generation size (in bytes)")                     \
3198                                                                             \
3199   product(uintx, NewSize, ScaleForWordSize(1*M),                            \
3200           "Initial new generation size (in bytes)")                         \
3201                                                                             \
3202   product(uintx, MaxNewSize, max_uintx,                                     \
3203           "Maximum new generation size (in bytes), max_uintx means set "    \
3204           "ergonomically")                                                  \
3205                                                                             \
3206   product(uintx, PretenureSizeThreshold, 0,                                 \
3207           "Maximum size in bytes of objects allocated in DefNew "           \
3208           "generation; zero means no maximum")                              \
3209                                                                             \
3210   product(uintx, TLABSize, 0,                                               \
3211           "Starting TLAB size (in bytes); zero means set ergonomically")    \
3212                                                                             \
3213   product(uintx, MinTLABSize, 2*K,                                          \
3214           "Minimum allowed TLAB size (in bytes)")                           \
3215                                                                             \
3216   product(uintx, TLABAllocationWeight, 35,                                  \
3217           "Allocation averaging weight")                                    \
3218                                                                             \
3219   product(uintx, TLABWasteTargetPercent, 1,                                 \
3220           "Percentage of Eden that can be wasted")                          \
3221                                                                             \
3222   product(uintx, TLABRefillWasteFraction,    64,                            \
3223           "Max TLAB waste at a refill (internal fragmentation)")            \
3224                                                                             \
3225   product(uintx, TLABWasteIncrement,    4,                                  \
3226           "Increment allowed waste at slow allocation")                     \
3227                                                                             \
3228   product(intx, SurvivorRatio, 8,                                           \
3229           "Ratio of eden/survivor space size")                              \
3230                                                                             \
3231   product(intx, NewRatio, 2,                                                \
3232           "Ratio of new/old generation sizes")                              \
3233                                                                             \
3234   product_pd(uintx, NewSizeThreadIncrease,                                  \
3235           "Additional size added to desired new generation size per "       \
3236           "non-daemon thread (in bytes)")                                   \
3237                                                                             \
3238   product_pd(uintx, PermSize,                                               \
3239           "Initial size of permanent generation (in bytes)")                \
3240                                                                             \
3241   product_pd(uintx, MaxPermSize,                                            \
3242           "Maximum size of permanent generation (in bytes)")                \
3243                                                                             \
3244   product(uintx, MinHeapFreeRatio,    40,                                   \
3245           "Min percentage of heap free after GC to avoid expansion")        \
3246                                                                             \
3247   product(uintx, MaxHeapFreeRatio,    70,                                   \
3248           "Max percentage of heap free after GC to avoid shrinking")        \
3249                                                                             \
3250   product(intx, SoftRefLRUPolicyMSPerMB, 1000,                              \
3251           "Number of milliseconds per MB of free space in the heap")        \
3252                                                                             \
3253   product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K),                \
3254           "Min change in heap space due to GC (in bytes)")                  \
3255                                                                             \
3256   product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K),             \
3257           "Min expansion of permanent heap (in bytes)")                     \
3258                                                                             \
3259   product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M),               \
3260           "Max expansion of permanent heap without full GC (in bytes)")     \
3261                                                                             \
3262   product(intx, QueuedAllocationWarningCount, 0,                            \
3263           "Number of times an allocation that queues behind a GC "          \
3264           "will retry before printing a warning")                           \
3265                                                                             \
3266   diagnostic(uintx, VerifyGCStartAt,   0,                                   \
3267           "GC invoke count where +VerifyBefore/AfterGC kicks in")           \
3268                                                                             \
3269   diagnostic(intx, VerifyGCLevel,     0,                                    \
3270           "Generation level at which to start +VerifyBefore/AfterGC")       \
3271                                                                             \
3272   develop(uintx, ExitAfterGCNum,   0,                                       \
3273           "If non-zero, exit after this GC.")                               \
3274                                                                             \
3275   product(intx, MaxTenuringThreshold,    15,                                \
3276           "Maximum value for tenuring threshold")                           \
3277                                                                             \
3278   product(intx, InitialTenuringThreshold,     7,                            \
3279           "Initial value for tenuring threshold")                           \
3280                                                                             \
3281   product(intx, TargetSurvivorRatio,    50,                                 \
3282           "Desired percentage of survivor space used after scavenge")       \
3283                                                                             \
3284   product(uintx, MarkSweepDeadRatio,     5,                                 \
3285           "Percentage (0-100) of the old gen allowed as dead wood."         \
3286           "Serial mark sweep treats this as both the min and max value."    \
3287           "CMS uses this value only if it falls back to mark sweep."        \
3288           "Par compact uses a variable scale based on the density of the"   \
3289           "generation and treats this as the max value when the heap is"    \
3290           "either completely full or completely empty.  Par compact also"   \
3291           "has a smaller default value; see arguments.cpp.")                \
3292                                                                             \
3293   product(uintx, PermMarkSweepDeadRatio,    20,                             \
3294           "Percentage (0-100) of the perm gen allowed as dead wood."        \
3295           "See MarkSweepDeadRatio for collector-specific comments.")        \
3296                                                                             \
3297   product(intx, MarkSweepAlwaysCompactCount,     4,                         \
3298           "How often should we fully compact the heap (ignoring the dead "  \
3299           "space parameters)")                                              \
3300                                                                             \
3301   product(intx, PrintCMSStatistics, 0,                                      \
3302           "Statistics for CMS")                                             \
3303                                                                             \
3304   product(bool, PrintCMSInitiationStatistics, false,                        \
3305           "Statistics for initiating a CMS collection")                     \
3306                                                                             \
3307   product(intx, PrintFLSStatistics, 0,                                      \
3308           "Statistics for CMS' FreeListSpace")                              \
3309                                                                             \
3310   product(intx, PrintFLSCensus, 0,                                          \
3311           "Census for CMS' FreeListSpace")                                  \
3312                                                                             \
3313   develop(uintx, GCExpandToAllocateDelayMillis, 0,                          \
3314           "Delay in ms between expansion and allocation")                   \
3315                                                                             \
3316   product(intx, DeferThrSuspendLoopCount,     4000,                         \
3317           "(Unstable) Number of times to iterate in safepoint loop "        \
3318           " before blocking VM threads ")                                   \
3319                                                                             \
3320   product(intx, DeferPollingPageLoopCount,     -1,                          \
3321           "(Unsafe,Unstable) Number of iterations in safepoint loop "       \
3322           "before changing safepoint polling page to RO ")                  \
3323                                                                             \
3324   product(intx, SafepointSpinBeforeYield, 2000,  "(Unstable)")              \
3325                                                                             \
3326   product(bool, PSChunkLargeArrays, true,                                   \
3327           "true: process large arrays in chunks")                           \
3328                                                                             \
3329   product(uintx, GCDrainStackTargetSize, 64,                                \
3330           "how many entries we'll try to leave on the stack during "        \
3331           "parallel GC")                                                    \
3332                                                                             \
3333   /* stack parameters */                                                    \
3334   product_pd(intx, StackYellowPages,                                        \
3335           "Number of yellow zone (recoverable overflows) pages")            \
3336                                                                             \
3337   product_pd(intx, StackRedPages,                                           \
3338           "Number of red zone (unrecoverable overflows) pages")             \
3339                                                                             \
3340   product_pd(intx, StackShadowPages,                                        \
3341           "Number of shadow zone (for overflow checking) pages"             \
3342           " this should exceed the depth of the VM and native call stack")  \
3343                                                                             \
3344   product_pd(intx, ThreadStackSize,                                         \
3345           "Thread Stack Size (in Kbytes)")                                  \
3346                                                                             \
3347   product_pd(intx, VMThreadStackSize,                                       \
3348           "Non-Java Thread Stack Size (in Kbytes)")                         \
3349                                                                             \
3350   product_pd(intx, CompilerThreadStackSize,                                 \
3351           "Compiler Thread Stack Size (in Kbytes)")                         \
3352                                                                             \
3353   develop_pd(uintx, JVMInvokeMethodSlack,                                   \
3354           "Stack space (bytes) required for JVM_InvokeMethod to complete")  \
3355                                                                             \
3356   product(uintx, ThreadSafetyMargin, 50*M,                                  \
3357           "Thread safety margin is used on fixed-stack LinuxThreads (on "   \
3358           "Linux/x86 only) to prevent heap-stack collision. Set to 0 to "   \
3359           "disable this feature")                                           \
3360                                                                             \
3361   /* code cache parameters */                                               \
3362   develop(uintx, CodeCacheSegmentSize, 64,                                  \
3363           "Code cache segment size (in bytes) - smallest unit of "          \
3364           "allocation")                                                     \
3365                                                                             \
3366   develop_pd(intx, CodeEntryAlignment,                                      \
3367           "Code entry alignment for generated code (in bytes)")             \
3368                                                                             \
3369   product_pd(intx, OptoLoopAlignment,                                       \
3370           "Align inner loops to zero relative to this modulus")             \
3371                                                                             \
3372   product_pd(uintx, InitialCodeCacheSize,                                   \
3373           "Initial code cache size (in bytes)")                             \
3374                                                                             \
3375   product_pd(uintx, ReservedCodeCacheSize,                                  \
3376           "Reserved code cache size (in bytes) - maximum code cache size")  \
3377                                                                             \
3378   product(uintx, CodeCacheMinimumFreeSpace, 500*K,                          \
3379           "When less than X space left, we stop compiling.")                \
3380                                                                             \
3381   product_pd(uintx, CodeCacheExpansionSize,                                 \
3382           "Code cache expansion size (in bytes)")                           \
3383                                                                             \
3384   develop_pd(uintx, CodeCacheMinBlockLength,                                \
3385           "Minimum number of segments in a code cache block.")              \
3386                                                                             \
3387   notproduct(bool, ExitOnFullCodeCache, false,                              \
3388           "Exit the VM if we fill the code cache.")                         \
3389                                                                             \
3390   product(bool, UseCodeCacheFlushing, true,                                 \
3391           "Attempt to clean the code cache before shutting off compiler")   \
3392                                                                             \
3393   product(intx,  MinCodeCacheFlushingInterval, 30,                          \
3394           "Min number of seconds between code cache cleaning sessions")     \
3395                                                                             \
3396   product(uintx,  CodeCacheFlushingMinimumFreeSpace, 1500*K,                \
3397           "When less than X space left, start code cache cleaning")         \
3398                                                                             \
3399   /* interpreter debugging */                                               \
3400   develop(intx, BinarySwitchThreshold, 5,                                   \
3401           "Minimal number of lookupswitch entries for rewriting to binary " \
3402           "switch")                                                         \
3403                                                                             \
3404   develop(intx, StopInterpreterAt, 0,                                       \
3405           "Stops interpreter execution at specified bytecode number")       \
3406                                                                             \
3407   develop(intx, TraceBytecodesAt, 0,                                        \
3408           "Traces bytecodes starting with specified bytecode number")       \
3409                                                                             \
3410   /* compiler interface */                                                  \
3411   develop(intx, CIStart, 0,                                                 \
3412           "the id of the first compilation to permit")                      \
3413                                                                             \
3414   develop(intx, CIStop,    -1,                                              \
3415           "the id of the last compilation to permit")                       \
3416                                                                             \
3417   develop(intx, CIStartOSR,     0,                                          \
3418           "the id of the first osr compilation to permit "                  \
3419           "(CICountOSR must be on)")                                        \
3420                                                                             \
3421   develop(intx, CIStopOSR,    -1,                                           \
3422           "the id of the last osr compilation to permit "                   \
3423           "(CICountOSR must be on)")                                        \
3424                                                                             \
3425   develop(intx, CIBreakAtOSR,    -1,                                        \
3426           "id of osr compilation to break at")                              \
3427                                                                             \
3428   develop(intx, CIBreakAt,    -1,                                           \
3429           "id of compilation to break at")                                  \
3430                                                                             \
3431   product(ccstrlist, CompileOnly, "",                                       \
3432           "List of methods (pkg/class.name) to restrict compilation to")    \
3433                                                                             \
3434   product(ccstr, CompileCommandFile, NULL,                                  \
3435           "Read compiler commands from this file [.hotspot_compiler]")      \
3436                                                                             \
3437   product(ccstrlist, CompileCommand, "",                                    \
3438           "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3439                                                                             \
3440   product(bool, CICompilerCountPerCPU, false,                               \
3441           "1 compiler thread for log(N CPUs)")                              \
3442                                                                             \
3443   develop(intx, CIFireOOMAt,    -1,                                         \
3444           "Fire OutOfMemoryErrors throughout CI for testing the compiler "  \
3445           "(non-negative value throws OOM after this many CI accesses "     \
3446           "in each compile)")                                               \
3447                                                                             \
3448   develop(intx, CIFireOOMAtDelay, -1,                                       \
3449           "Wait for this many CI accesses to occur in all compiles before " \
3450           "beginning to throw OutOfMemoryErrors in each compile")           \
3451                                                                             \
3452   notproduct(bool, CIObjectFactoryVerify, false,                            \
3453           "enable potentially expensive verification in ciObjectFactory")   \
3454                                                                             \
3455   /* Priorities */                                                          \
3456   product_pd(bool, UseThreadPriorities,  "Use native thread priorities")    \
3457                                                                             \
3458   product(intx, ThreadPriorityPolicy, 0,                                    \
3459           "0 : Normal.                                                     "\
3460           "    VM chooses priorities that are appropriate for normal       "\
3461           "    applications. On Solaris NORM_PRIORITY and above are mapped "\
3462           "    to normal native priority. Java priorities below NORM_PRIORITY"\
3463           "    map to lower native priority values. On Windows applications"\
3464           "    are allowed to use higher native priorities. However, with  "\
3465           "    ThreadPriorityPolicy=0, VM will not use the highest possible"\
3466           "    native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may   "\
3467           "    interfere with system threads. On Linux thread priorities   "\
3468           "    are ignored because the OS does not support static priority "\
3469           "    in SCHED_OTHER scheduling class which is the only choice for"\
3470           "    non-root, non-realtime applications.                        "\
3471           "1 : Aggressive.                                                 "\
3472           "    Java thread priorities map over to the entire range of      "\
3473           "    native thread priorities. Higher Java thread priorities map "\
3474           "    to higher native thread priorities. This policy should be   "\
3475           "    used with care, as sometimes it can cause performance       "\
3476           "    degradation in the application and/or the entire system. On "\
3477           "    Linux this policy requires root privilege.")                 \
3478                                                                             \
3479   product(bool, ThreadPriorityVerbose, false,                               \
3480           "print priority changes")                                         \
3481                                                                             \
3482   product(intx, DefaultThreadPriority, -1,                                  \
3483           "what native priority threads run at if not specified elsewhere (-1 means no change)") \

3484                                                                             \
3485   product(intx, CompilerThreadPriority, -1,                                 \
3486           "what priority should compiler threads run at (-1 means no change)") \

3487                                                                             \
3488   product(intx, VMThreadPriority, -1,                                       \
3489           "what priority should VM threads run at (-1 means no change)")    \

3490                                                                             \
3491   product(bool, CompilerThreadHintNoPreempt, true,                          \
3492           "(Solaris only) Give compiler threads an extra quanta")           \
3493                                                                             \
3494   product(bool, VMThreadHintNoPreempt, false,                               \
3495           "(Solaris only) Give VM thread an extra quanta")                  \
3496                                                                             \
3497   product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3498   product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3499   product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3500   product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3501   product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3502   product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3503   product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3504   product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3505   product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3506   product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
3507                                                                             \









3508   /* compiler debugging */                                                  \
3509   notproduct(intx, CompileTheWorldStartAt,     1,                           \
3510           "First class to consider when using +CompileTheWorld")            \
3511                                                                             \
3512   notproduct(intx, CompileTheWorldStopAt, max_jint,                         \
3513           "Last class to consider when using +CompileTheWorld")             \
3514                                                                             \
3515   develop(intx, NewCodeParameter,      0,                                   \
3516           "Testing Only: Create a dedicated integer parameter before "      \
3517           "putback")                                                        \
3518                                                                             \
3519   /* new oopmap storage allocation */                                       \
3520   develop(intx, MinOopMapAllocation,     8,                                 \
3521           "Minimum number of OopMap entries in an OopMapSet")               \
3522                                                                             \
3523   /* Background Compilation */                                              \
3524   develop(intx, LongCompileThreshold,     50,                               \
3525           "Used with +TraceLongCompiles")                                   \
3526                                                                             \
3527   product(intx, StarvationMonitorInterval,    200,                          \
3528           "Pause between each check in ms")                                 \
3529                                                                             \
3530   /* recompilation */                                                       \
3531   product_pd(intx, CompileThreshold,                                        \
3532           "number of interpreted method invocations before (re-)compiling") \
3533                                                                             \
3534   product_pd(intx, BackEdgeThreshold,                                       \
3535           "Interpreter Back edge threshold at which an OSR compilation is invoked")\
3536                                                                             \
3537   product(intx, Tier0InvokeNotifyFreqLog, 7,                                \
3538           "Interpreter (tier 0) invocation notification frequency.")        \
3539                                                                             \
3540   product(intx, Tier2InvokeNotifyFreqLog, 11,                               \
3541           "C1 without MDO (tier 2) invocation notification frequency.")     \
3542                                                                             \
3543   product(intx, Tier3InvokeNotifyFreqLog, 10,                               \
3544           "C1 with MDO profiling (tier 3) invocation notification "         \
3545           "frequency.")                                                     \
3546                                                                             \
3547   product(intx, Tier23InlineeNotifyFreqLog, 20,                             \
3548           "Inlinee invocation (tiers 2 and 3) notification frequency")      \
3549                                                                             \
3550   product(intx, Tier0BackedgeNotifyFreqLog, 10,                             \
3551           "Interpreter (tier 0) invocation notification frequency.")        \
3552                                                                             \
3553   product(intx, Tier2BackedgeNotifyFreqLog, 14,                             \
3554           "C1 without MDO (tier 2) invocation notification frequency.")     \
3555                                                                             \
3556   product(intx, Tier3BackedgeNotifyFreqLog, 13,                             \
3557           "C1 with MDO profiling (tier 3) invocation notification "         \
3558           "frequency.")                                                     \
3559                                                                             \
3560   product(intx, Tier2CompileThreshold, 0,                                   \
3561           "threshold at which tier 2 compilation is invoked")               \
3562                                                                             \
3563   product(intx, Tier2BackEdgeThreshold, 0,                                  \
3564           "Back edge threshold at which tier 2 compilation is invoked")     \
3565                                                                             \
3566   product(intx, Tier3InvocationThreshold, 200,                              \
3567           "Compile if number of method invocations crosses this "           \
3568           "threshold")                                                      \
3569                                                                             \
3570   product(intx, Tier3MinInvocationThreshold, 100,                           \
3571           "Minimum invocation to compile at tier 3")                        \
3572                                                                             \
3573   product(intx, Tier3CompileThreshold, 2000,                                \
3574           "Threshold at which tier 3 compilation is invoked (invocation "   \
3575           "minimum must be satisfied.")                                     \
3576                                                                             \
3577   product(intx, Tier3BackEdgeThreshold,  7000,                              \
3578           "Back edge threshold at which tier 3 OSR compilation is invoked") \
3579                                                                             \
3580   product(intx, Tier4InvocationThreshold, 5000,                             \
3581           "Compile if number of method invocations crosses this "           \
3582           "threshold")                                                      \
3583                                                                             \
3584   product(intx, Tier4MinInvocationThreshold, 600,                           \
3585           "Minimum invocation to compile at tier 4")                        \
3586                                                                             \
3587   product(intx, Tier4CompileThreshold, 15000,                               \
3588           "Threshold at which tier 4 compilation is invoked (invocation "   \
3589           "minimum must be satisfied.")                                     \
3590                                                                             \
3591   product(intx, Tier4BackEdgeThreshold, 40000,                              \
3592           "Back edge threshold at which tier 4 OSR compilation is invoked") \
3593                                                                             \
3594   product(intx, Tier3DelayOn, 5,                                            \
3595           "If C2 queue size grows over this amount per compiler thread "    \
3596           "stop compiling at tier 3 and start compiling at tier 2")         \
3597                                                                             \
3598   product(intx, Tier3DelayOff, 2,                                           \
3599           "If C2 queue size is less than this amount per compiler thread "  \
3600           "allow methods compiled at tier 2 transition to tier 3")          \
3601                                                                             \
3602   product(intx, Tier3LoadFeedback, 5,                                       \
3603           "Tier 3 thresholds will increase twofold when C1 queue size "     \
3604           "reaches this amount per compiler thread")                        \
3605                                                                             \
3606   product(intx, Tier4LoadFeedback, 3,                                       \
3607           "Tier 4 thresholds will increase twofold when C2 queue size "     \
3608           "reaches this amount per compiler thread")                        \
3609                                                                             \
3610   product(intx, TieredCompileTaskTimeout, 50,                               \
3611           "Kill compile task if method was not used within "                \
3612           "given timeout in milliseconds")                                  \
3613                                                                             \
3614   product(intx, TieredStopAtLevel, 4,                                       \
3615           "Stop at given compilation level")                                \
3616                                                                             \
3617   product(intx, Tier0ProfilingStartPercentage, 200,                         \
3618           "Start profiling in interpreter if the counters exceed tier 3"    \
3619           "thresholds by the specified percentage")                         \
3620                                                                             \
3621   product(intx, TieredRateUpdateMinTime, 1,                                 \
3622           "Minimum rate sampling interval (in milliseconds)")               \
3623                                                                             \
3624   product(intx, TieredRateUpdateMaxTime, 25,                                \
3625           "Maximum rate sampling interval (in milliseconds)")               \
3626                                                                             \
3627   product_pd(bool, TieredCompilation,                                       \
3628           "Enable tiered compilation")                                      \
3629                                                                             \
3630   product(bool, PrintTieredEvents, false,                                   \
3631           "Print tiered events notifications")                              \
3632                                                                             \
3633   product(bool, StressTieredRuntime, false,                                 \
3634           "Alternate client and server compiler on compile requests")       \
3635                                                                             \
3636   product_pd(intx, OnStackReplacePercentage,                                \
3637           "NON_TIERED number of method invocations/branches (expressed as %"\
3638           "of CompileThreshold) before (re-)compiling OSR code")            \
3639                                                                             \
3640   product(intx, InterpreterProfilePercentage, 33,                           \
3641           "NON_TIERED number of method invocations/branches (expressed as %"\
3642           "of CompileThreshold) before profiling in the interpreter")       \
3643                                                                             \
3644   develop(intx, MaxRecompilationSearchLength,    10,                        \
3645           "max. # frames to inspect searching for recompilee")              \
3646                                                                             \
3647   develop(intx, MaxInterpretedSearchLength,     3,                          \
3648           "max. # interp. frames to skip when searching for recompilee")    \
3649                                                                             \
3650   develop(intx, DesiredMethodLimit,  8000,                                  \
3651           "desired max. method size (in bytecodes) after inlining")         \
3652                                                                             \
3653   develop(intx, HugeMethodLimit,  8000,                                     \
3654           "don't compile methods larger than this if "                      \
3655           "+DontCompileHugeMethods")                                        \
3656                                                                             \
3657   /* New JDK 1.4 reflection implementation */                               \
3658                                                                             \
3659   develop(bool, UseNewReflection, true,                                     \
3660           "Temporary flag for transition to reflection based on dynamic "   \
3661           "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3662           "JDK, and is unneeded in 1.3 JDK, but marks most places VM "      \
3663           "changes were needed")                                            \
3664                                                                             \
3665   develop(bool, VerifyReflectionBytecodes, false,                           \
3666           "Force verification of 1.4 reflection bytecodes. Does not work "  \
3667           "in situations like that described in 4486457 or for "            \
3668           "constructors generated for serialization, so can not be enabled "\
3669           "in product.")                                                    \
3670                                                                             \
3671   product(bool, ReflectionWrapResolutionErrors, true,                       \
3672           "Temporary flag for transition to AbstractMethodError wrapped "   \
3673           "in InvocationTargetException. See 6531596")                      \
3674                                                                             \
3675                                                                             \
3676   develop(intx, FastSuperclassLimit, 8,                                     \
3677           "Depth of hardwired instanceof accelerator array")                \
3678                                                                             \
3679   /* Properties for Java libraries  */                                      \
3680                                                                             \
3681   product(intx, MaxDirectMemorySize, -1,                                    \
3682           "Maximum total size of NIO direct-buffer allocations")            \
3683                                                                             \
3684   /* temporary developer defined flags  */                                  \
3685                                                                             \
3686   diagnostic(bool, UseNewCode, false,                                       \
3687           "Testing Only: Use the new version while testing")                \
3688                                                                             \
3689   diagnostic(bool, UseNewCode2, false,                                      \
3690           "Testing Only: Use the new version while testing")                \
3691                                                                             \
3692   diagnostic(bool, UseNewCode3, false,                                      \
3693           "Testing Only: Use the new version while testing")                \
3694                                                                             \
3695   /* flags for performance data collection */                               \
3696                                                                             \
3697   product(bool, UsePerfData, falseInEmbedded,                               \
3698           "Flag to disable jvmstat instrumentation for performance testing" \
3699           "and problem isolation purposes.")                                \
3700                                                                             \
3701   product(bool, PerfDataSaveToFile, false,                                  \
3702           "Save PerfData memory to hsperfdata_<pid> file on exit")          \
3703                                                                             \
3704   product(ccstr, PerfDataSaveFile, NULL,                                    \
3705           "Save PerfData memory to the specified absolute pathname,"        \
3706            "%p in the file name if present will be replaced by pid")        \
3707                                                                             \
3708   product(intx, PerfDataSamplingInterval, 50 /*ms*/,                        \
3709           "Data sampling interval in milliseconds")                         \
3710                                                                             \
3711   develop(bool, PerfTraceDataCreation, false,                               \
3712           "Trace creation of Performance Data Entries")                     \
3713                                                                             \
3714   develop(bool, PerfTraceMemOps, false,                                     \
3715           "Trace PerfMemory create/attach/detach calls")                    \
3716                                                                             \
3717   product(bool, PerfDisableSharedMem, false,                                \
3718           "Store performance data in standard memory")                      \
3719                                                                             \
3720   product(intx, PerfDataMemorySize, 32*K,                                   \
3721           "Size of performance data memory region. Will be rounded "        \
3722           "up to a multiple of the native os page size.")                   \
3723                                                                             \
3724   product(intx, PerfMaxStringConstLength, 1024,                             \
3725           "Maximum PerfStringConstant string length before truncation")     \
3726                                                                             \
3727   product(bool, PerfAllowAtExitRegistration, false,                         \
3728           "Allow registration of atexit() methods")                         \
3729                                                                             \
3730   product(bool, PerfBypassFileSystemCheck, false,                           \
3731           "Bypass Win32 file system criteria checks (Windows Only)")        \
3732                                                                             \
3733   product(intx, UnguardOnExecutionViolation, 0,                             \
3734           "Unguard page and retry on no-execute fault (Win32 only)"         \
3735           "0=off, 1=conservative, 2=aggressive")                            \
3736                                                                             \
3737   /* Serviceability Support */                                              \
3738                                                                             \
3739   product(bool, ManagementServer, false,                                    \
3740           "Create JMX Management Server")                                   \
3741                                                                             \
3742   product(bool, DisableAttachMechanism, false,                              \
3743          "Disable mechanism that allows tools to attach to this VM")        \
3744                                                                             \
3745   product(bool, StartAttachListener, false,                                 \
3746           "Always start Attach Listener at VM startup")                     \
3747                                                                             \
3748   manageable(bool, PrintConcurrentLocks, false,                             \
3749           "Print java.util.concurrent locks in thread dump")                \
3750                                                                             \
3751   product(bool, TransmitErrorReport, false,                                 \
3752           "Enable error report transmission on erroneous termination")      \
3753                                                                             \
3754   product(ccstr, ErrorReportServer, NULL,                                   \
3755           "Override built-in error report server address")                  \
3756                                                                             \
3757   /* Shared spaces */                                                       \
3758                                                                             \
3759   product(bool, UseSharedSpaces, true,                                      \
3760           "Use shared spaces in the permanent generation")                  \
3761                                                                             \
3762   product(bool, RequireSharedSpaces, false,                                 \
3763           "Require shared spaces in the permanent generation")              \
3764                                                                             \
3765   product(bool, DumpSharedSpaces, false,                                    \
3766            "Special mode: JVM reads a class list, loads classes, builds "   \
3767             "shared spaces, and dumps the shared spaces to a file to be "   \
3768             "used in future JVM runs.")                                     \
3769                                                                             \
3770   product(bool, PrintSharedSpaces, false,                                   \
3771           "Print usage of shared spaces")                                   \
3772                                                                             \
3773   product(uintx, SharedDummyBlockSize, 512*M,                               \
3774           "Size of dummy block used to shift heap addresses (in bytes)")    \
3775                                                                             \
3776   product(uintx, SharedReadWriteSize,  NOT_LP64(12*M) LP64_ONLY(13*M),      \
3777           "Size of read-write space in permanent generation (in bytes)")    \
3778                                                                             \
3779   product(uintx, SharedReadOnlySize,   10*M,                                \
3780           "Size of read-only space in permanent generation (in bytes)")     \
3781                                                                             \
3782   product(uintx, SharedMiscDataSize,    NOT_LP64(4*M) LP64_ONLY(5*M),       \
3783           "Size of the shared data area adjacent to the heap (in bytes)")   \
3784                                                                             \
3785   product(uintx, SharedMiscCodeSize,    4*M,                                \
3786           "Size of the shared code area adjacent to the heap (in bytes)")   \
3787                                                                             \
3788   diagnostic(bool, SharedOptimizeColdStart, true,                           \
3789           "At dump time, order shared objects to achieve better "           \
3790           "cold startup time.")                                             \
3791                                                                             \
3792   develop(intx, SharedOptimizeColdStartPolicy, 2,                           \
3793           "Reordering policy for SharedOptimizeColdStart "                  \
3794           "0=favor classload-time locality, 1=balanced, "                   \
3795           "2=favor runtime locality")                                       \
3796                                                                             \
3797   diagnostic(bool, SharedSkipVerify, false,                                 \
3798           "Skip assert() and verify() which page-in unwanted shared "       \
3799           "objects. ")                                                      \
3800                                                                             \
3801   diagnostic(bool, EnableInvokeDynamic, true,                               \
3802           "support JSR 292 (method handles, invokedynamic, "                \
3803           "anonymous classes")                                              \
3804                                                                             \
3805   product(bool, AnonymousClasses, false,                                    \
3806           "support sun.misc.Unsafe.defineAnonymousClass (deprecated)")      \
3807                                                                             \
3808   experimental(bool, EnableMethodHandles, false,                            \
3809           "support method handles (deprecated)")                            \
3810                                                                             \
3811   diagnostic(intx, MethodHandlePushLimit, 3,                                \
3812           "number of additional stack slots a method handle may push")      \
3813                                                                             \
3814   diagnostic(bool, PrintMethodHandleStubs, false,                           \
3815           "Print generated stub code for method handles")                   \
3816                                                                             \
3817   develop(bool, TraceMethodHandles, false,                                  \
3818           "trace internal method handle operations")                        \
3819                                                                             \
3820   diagnostic(bool, VerifyMethodHandles, trueInDebug,                        \
3821           "perform extra checks when constructing method handles")          \
3822                                                                             \
3823   diagnostic(bool, OptimizeMethodHandles, true,                             \
3824           "when constructing method handles, try to improve them")          \
3825                                                                             \
3826   develop(bool, StressMethodHandleWalk, false,                              \
3827           "Process all method handles with MethodHandleWalk")               \
3828                                                                             \
3829   diagnostic(bool, UseRicochetFrames, true,                                 \
3830           "use ricochet stack frames for method handle combination, "       \
3831           "if the platform supports them")                                  \
3832                                                                             \
3833   experimental(bool, TrustFinalNonStaticFields, false,                      \
3834           "trust final non-static declarations for constant folding")       \
3835                                                                             \
3836   experimental(bool, AllowInvokeGeneric, false,                             \
3837           "accept MethodHandle.invoke and MethodHandle.invokeGeneric "      \
3838           "as equivalent methods")                                          \
3839                                                                             \
3840   develop(bool, TraceInvokeDynamic, false,                                  \
3841           "trace internal invoke dynamic operations")                       \
3842                                                                             \
3843   diagnostic(bool, PauseAtStartup,      false,                              \
3844           "Causes the VM to pause at startup time and wait for the pause "  \
3845           "file to be removed (default: ./vm.paused.<pid>)")                \
3846                                                                             \
3847   diagnostic(ccstr, PauseAtStartupFile, NULL,                               \
3848           "The file to create and for whose removal to await when pausing " \
3849           "at startup. (default: ./vm.paused.<pid>)")                       \
3850                                                                             \
3851   diagnostic(bool, PauseAtExit, false,                                      \
3852           "Pause and wait for keypress on exit if a debugger is attached")  \
3853                                                                             \
3854   product(bool, ExtendedDTraceProbes,    false,                             \
3855           "Enable performance-impacting dtrace probes")                     \
3856                                                                             \
3857   product(bool, DTraceMethodProbes, false,                                  \
3858           "Enable dtrace probes for method-entry and method-exit")          \
3859                                                                             \
3860   product(bool, DTraceAllocProbes, false,                                   \
3861           "Enable dtrace probes for object allocation")                     \
3862                                                                             \
3863   product(bool, DTraceMonitorProbes, false,                                 \
3864           "Enable dtrace probes for monitor events")                        \
3865                                                                             \
3866   product(bool, RelaxAccessControlCheck, false,                             \
3867           "Relax the access control checks in the verifier")                \
3868                                                                             \
3869   diagnostic(bool, PrintDTraceDOF, false,                                   \
3870              "Print the DTrace DOF passed to the system for JSDT probes")   \
3871                                                                             \
3872   product(uintx, StringTableSize, 1009,                                     \
3873           "Number of buckets in the interned String table")                 \
3874                                                                             \
3875   product(bool, UseVMInterruptibleIO, false,                                \
3876           "(Unstable, Solaris-specific) Thread interrupt before or with "   \
3877           "EINTR for I/O operations results in OS_INTRPT. The default value"\
3878           " of this flag is true for JDK 6 and earliers")
3879 
3880 /*
3881  *  Macros for factoring of globals
3882  */
3883 
3884 // Interface macros
3885 #define DECLARE_PRODUCT_FLAG(type, name, value, doc)    extern "C" type name;
3886 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc)        extern "C" type name;
3887 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3888 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3889 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3890 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3891 #ifdef PRODUCT
3892 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)  const type name = value;
3893 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)      const type name = pd_##name;
3894 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)
3895 #else
3896 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)  extern "C" type name;
3897 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)      extern "C" type name;
3898 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)  extern "C" type name;
3899 #endif
3900 // Special LP64 flags, product only needed for now.
3901 #ifdef _LP64
3902 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3903 #else
3904 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3905 #endif // _LP64
3906 
3907 // Implementation macros
3908 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc)   type name = value;
3909 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc)       type name = pd_##name;
3910 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3911 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3912 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3913 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3914 #ifdef PRODUCT
3915 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */
3916 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)     /* flag name is constant */
3917 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
3918 #else
3919 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3920 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)     type name = pd_##name;
3921 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3922 #endif
3923 #ifdef _LP64
3924 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc)   type name = value;
3925 #else
3926 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3927 #endif // _LP64
3928 
3929 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)
3930 
3931 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3932 
3933 // Extensions
3934 
3935 #include "runtime/globals_ext.hpp"
3936 
3937 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP
--- EOF ---