globals.hpp revision 11219:137319683e94
1/* 2 * Copyright (c) 1997, 2016, 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#include <float.h> // for DBL_MAX 30 31// use this for flags that are true per default in the tiered build 32// but false in non-tiered builds, and vice versa 33#ifdef TIERED 34#define trueInTiered true 35#define falseInTiered false 36#else 37#define trueInTiered false 38#define falseInTiered true 39#endif 40 41#ifdef TARGET_ARCH_x86 42# include "globals_x86.hpp" 43#endif 44#ifdef TARGET_ARCH_sparc 45# include "globals_sparc.hpp" 46#endif 47#ifdef TARGET_ARCH_zero 48# include "globals_zero.hpp" 49#endif 50#ifdef TARGET_ARCH_arm 51# include "globals_arm.hpp" 52#endif 53#ifdef TARGET_ARCH_ppc 54# include "globals_ppc.hpp" 55#endif 56#ifdef TARGET_ARCH_aarch64 57# include "globals_aarch64.hpp" 58#endif 59#ifdef TARGET_OS_FAMILY_linux 60# include "globals_linux.hpp" 61#endif 62#ifdef TARGET_OS_FAMILY_solaris 63# include "globals_solaris.hpp" 64#endif 65#ifdef TARGET_OS_FAMILY_windows 66# include "globals_windows.hpp" 67#endif 68#ifdef TARGET_OS_FAMILY_aix 69# include "globals_aix.hpp" 70#endif 71#ifdef TARGET_OS_FAMILY_bsd 72# include "globals_bsd.hpp" 73#endif 74#ifdef TARGET_OS_ARCH_linux_x86 75# include "globals_linux_x86.hpp" 76#endif 77#ifdef TARGET_OS_ARCH_linux_sparc 78# include "globals_linux_sparc.hpp" 79#endif 80#ifdef TARGET_OS_ARCH_linux_zero 81# include "globals_linux_zero.hpp" 82#endif 83#ifdef TARGET_OS_ARCH_solaris_x86 84# include "globals_solaris_x86.hpp" 85#endif 86#ifdef TARGET_OS_ARCH_solaris_sparc 87# include "globals_solaris_sparc.hpp" 88#endif 89#ifdef TARGET_OS_ARCH_windows_x86 90# include "globals_windows_x86.hpp" 91#endif 92#ifdef TARGET_OS_ARCH_linux_arm 93# include "globals_linux_arm.hpp" 94#endif 95#ifdef TARGET_OS_ARCH_linux_ppc 96# include "globals_linux_ppc.hpp" 97#endif 98#ifdef TARGET_OS_ARCH_linux_aarch64 99# include "globals_linux_aarch64.hpp" 100#endif 101#ifdef TARGET_OS_ARCH_aix_ppc 102# include "globals_aix_ppc.hpp" 103#endif 104#ifdef TARGET_OS_ARCH_bsd_x86 105# include "globals_bsd_x86.hpp" 106#endif 107#ifdef TARGET_OS_ARCH_bsd_zero 108# include "globals_bsd_zero.hpp" 109#endif 110#ifdef COMPILER1 111#ifdef TARGET_ARCH_x86 112# include "c1_globals_x86.hpp" 113#endif 114#ifdef TARGET_ARCH_sparc 115# include "c1_globals_sparc.hpp" 116#endif 117#ifdef TARGET_ARCH_arm 118# include "c1_globals_arm.hpp" 119#endif 120#ifdef TARGET_ARCH_aarch64 121# include "c1_globals_aarch64.hpp" 122#endif 123#ifdef TARGET_OS_FAMILY_linux 124# include "c1_globals_linux.hpp" 125#endif 126#ifdef TARGET_OS_FAMILY_solaris 127# include "c1_globals_solaris.hpp" 128#endif 129#ifdef TARGET_OS_FAMILY_windows 130# include "c1_globals_windows.hpp" 131#endif 132#ifdef TARGET_OS_FAMILY_aix 133# include "c1_globals_aix.hpp" 134#endif 135#ifdef TARGET_OS_FAMILY_bsd 136# include "c1_globals_bsd.hpp" 137#endif 138#ifdef TARGET_ARCH_ppc 139# include "c1_globals_ppc.hpp" 140#endif 141#endif 142#ifdef COMPILER2 143#ifdef TARGET_ARCH_x86 144# include "c2_globals_x86.hpp" 145#endif 146#ifdef TARGET_ARCH_sparc 147# include "c2_globals_sparc.hpp" 148#endif 149#ifdef TARGET_ARCH_arm 150# include "c2_globals_arm.hpp" 151#endif 152#ifdef TARGET_ARCH_ppc 153# include "c2_globals_ppc.hpp" 154#endif 155#ifdef TARGET_ARCH_aarch64 156# include "c2_globals_aarch64.hpp" 157#endif 158#ifdef TARGET_OS_FAMILY_linux 159# include "c2_globals_linux.hpp" 160#endif 161#ifdef TARGET_OS_FAMILY_solaris 162# include "c2_globals_solaris.hpp" 163#endif 164#ifdef TARGET_OS_FAMILY_windows 165# include "c2_globals_windows.hpp" 166#endif 167#ifdef TARGET_OS_FAMILY_aix 168# include "c2_globals_aix.hpp" 169#endif 170#ifdef TARGET_OS_FAMILY_bsd 171# include "c2_globals_bsd.hpp" 172#endif 173#endif 174#ifdef SHARK 175#ifdef TARGET_ARCH_zero 176# include "shark_globals_zero.hpp" 177#endif 178#endif 179 180#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) && !INCLUDE_JVMCI 181define_pd_global(bool, BackgroundCompilation, false); 182define_pd_global(bool, UseTLAB, false); 183define_pd_global(bool, CICompileOSR, false); 184define_pd_global(bool, UseTypeProfile, false); 185define_pd_global(bool, UseOnStackReplacement, false); 186define_pd_global(bool, InlineIntrinsics, false); 187define_pd_global(bool, PreferInterpreterNativeStubs, true); 188define_pd_global(bool, ProfileInterpreter, false); 189define_pd_global(bool, ProfileTraps, false); 190define_pd_global(bool, TieredCompilation, false); 191 192define_pd_global(intx, CompileThreshold, 0); 193 194define_pd_global(intx, OnStackReplacePercentage, 0); 195define_pd_global(bool, ResizeTLAB, false); 196define_pd_global(intx, FreqInlineSize, 0); 197define_pd_global(size_t, NewSizeThreadIncrease, 4*K); 198define_pd_global(intx, InlineClassNatives, true); 199define_pd_global(intx, InlineUnsafeOps, true); 200define_pd_global(intx, InitialCodeCacheSize, 160*K); 201define_pd_global(intx, ReservedCodeCacheSize, 32*M); 202define_pd_global(intx, NonProfiledCodeHeapSize, 0); 203define_pd_global(intx, ProfiledCodeHeapSize, 0); 204define_pd_global(intx, NonNMethodCodeHeapSize, 32*M); 205 206define_pd_global(intx, CodeCacheExpansionSize, 32*K); 207define_pd_global(intx, CodeCacheMinBlockLength, 1); 208define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 209define_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 210define_pd_global(bool, NeverActAsServerClassMachine, true); 211define_pd_global(uint64_t,MaxRAM, 1ULL*G); 212#define CI_COMPILER_COUNT 0 213#else 214 215#if defined(COMPILER2) || INCLUDE_JVMCI 216#define CI_COMPILER_COUNT 2 217#else 218#define CI_COMPILER_COUNT 1 219#endif // COMPILER2 || INCLUDE_JVMCI 220 221#endif // no compilers 222 223// string type aliases used only in this file 224typedef const char* ccstr; 225typedef const char* ccstrlist; // represents string arguments which accumulate 226 227// function type that will construct default range string 228typedef const char* (*RangeStrFunc)(void); 229 230struct Flag { 231 enum Flags { 232 // value origin 233 DEFAULT = 0, 234 COMMAND_LINE = 1, 235 ENVIRON_VAR = 2, 236 CONFIG_FILE = 3, 237 MANAGEMENT = 4, 238 ERGONOMIC = 5, 239 ATTACH_ON_DEMAND = 6, 240 INTERNAL = 7, 241 242 LAST_VALUE_ORIGIN = INTERNAL, 243 VALUE_ORIGIN_BITS = 4, 244 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS), 245 246 // flag kind 247 KIND_PRODUCT = 1 << 4, 248 KIND_MANAGEABLE = 1 << 5, 249 KIND_DIAGNOSTIC = 1 << 6, 250 KIND_EXPERIMENTAL = 1 << 7, 251 KIND_NOT_PRODUCT = 1 << 8, 252 KIND_DEVELOP = 1 << 9, 253 KIND_PLATFORM_DEPENDENT = 1 << 10, 254 KIND_READ_WRITE = 1 << 11, 255 KIND_C1 = 1 << 12, 256 KIND_C2 = 1 << 13, 257 KIND_ARCH = 1 << 14, 258 KIND_SHARK = 1 << 15, 259 KIND_LP64_PRODUCT = 1 << 16, 260 KIND_COMMERCIAL = 1 << 17, 261 KIND_JVMCI = 1 << 18, 262 263 KIND_MASK = ~VALUE_ORIGIN_MASK 264 }; 265 266 enum Error { 267 // no error 268 SUCCESS = 0, 269 // flag name is missing 270 MISSING_NAME, 271 // flag value is missing 272 MISSING_VALUE, 273 // error parsing the textual form of the value 274 WRONG_FORMAT, 275 // flag is not writeable 276 NON_WRITABLE, 277 // flag value is outside of its bounds 278 OUT_OF_BOUNDS, 279 // flag value violates its constraint 280 VIOLATES_CONSTRAINT, 281 // there is no flag with the given name 282 INVALID_FLAG, 283 // the flag can only be set only on command line during invocation of the VM 284 COMMAND_LINE_ONLY, 285 // the flag may only be set once 286 SET_ONLY_ONCE, 287 // the flag is not writable in this combination of product/debug build 288 CONSTANT, 289 // other, unspecified error related to setting the flag 290 ERR_OTHER 291 }; 292 293 enum MsgType { 294 NONE = 0, 295 DIAGNOSTIC_FLAG_BUT_LOCKED, 296 EXPERIMENTAL_FLAG_BUT_LOCKED, 297 DEVELOPER_FLAG_BUT_PRODUCT_BUILD, 298 NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD 299 }; 300 301 const char* _type; 302 const char* _name; 303 void* _addr; 304 NOT_PRODUCT(const char* _doc;) 305 Flags _flags; 306 307 // points to all Flags static array 308 static Flag* flags; 309 310 // number of flags 311 static size_t numFlags; 312 313 static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); }; 314 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false); 315 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 316 317 static const char* get_int_default_range_str(); 318 static const char* get_uint_default_range_str(); 319 static const char* get_intx_default_range_str(); 320 static const char* get_uintx_default_range_str(); 321 static const char* get_uint64_t_default_range_str(); 322 static const char* get_size_t_default_range_str(); 323 static const char* get_double_default_range_str(); 324 325 Flag::Error check_writable(bool changed); 326 327 bool is_bool() const; 328 bool get_bool() const; 329 Flag::Error set_bool(bool value); 330 331 bool is_int() const; 332 int get_int() const; 333 Flag::Error set_int(int value); 334 335 bool is_uint() const; 336 uint get_uint() const; 337 Flag::Error set_uint(uint value); 338 339 bool is_intx() const; 340 intx get_intx() const; 341 Flag::Error set_intx(intx value); 342 343 bool is_uintx() const; 344 uintx get_uintx() const; 345 Flag::Error set_uintx(uintx value); 346 347 bool is_uint64_t() const; 348 uint64_t get_uint64_t() const; 349 Flag::Error set_uint64_t(uint64_t value); 350 351 bool is_size_t() const; 352 size_t get_size_t() const; 353 Flag::Error set_size_t(size_t value); 354 355 bool is_double() const; 356 double get_double() const; 357 Flag::Error set_double(double value); 358 359 bool is_ccstr() const; 360 bool ccstr_accumulates() const; 361 ccstr get_ccstr() const; 362 Flag::Error set_ccstr(ccstr value); 363 364 Flags get_origin(); 365 void set_origin(Flags origin); 366 367 bool is_default(); 368 bool is_ergonomic(); 369 bool is_command_line(); 370 371 bool is_product() const; 372 bool is_manageable() const; 373 bool is_diagnostic() const; 374 bool is_experimental() const; 375 bool is_notproduct() const; 376 bool is_develop() const; 377 bool is_read_write() const; 378 bool is_commercial() const; 379 380 bool is_constant_in_binary() const; 381 382 bool is_unlocker() const; 383 bool is_unlocked() const; 384 bool is_writeable() const; 385 bool is_external() const; 386 387 bool is_unlocker_ext() const; 388 bool is_unlocked_ext() const; 389 bool is_writeable_ext() const; 390 bool is_external_ext() const; 391 392 void unlock_diagnostic(); 393 394 Flag::MsgType get_locked_message(char*, int) const; 395 void get_locked_message_ext(char*, int) const; 396 397 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 398 void print_on(outputStream* st, bool withComments = false, bool printRanges = false); 399 void print_kind(outputStream* st); 400 void print_as_flag(outputStream* st); 401 402 static const char* flag_error_str(Flag::Error error); 403}; 404 405// debug flags control various aspects of the VM and are global accessible 406 407// use FlagSetting to temporarily change some debug flag 408// e.g. FlagSetting fs(DebugThisAndThat, true); 409// restored to previous value upon leaving scope 410class FlagSetting { 411 bool val; 412 bool* flag; 413 public: 414 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 415 ~FlagSetting() { *flag = val; } 416}; 417 418 419class CounterSetting { 420 intx* counter; 421 public: 422 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 423 ~CounterSetting() { (*counter)--; } 424}; 425 426class IntFlagSetting { 427 int val; 428 int* flag; 429 public: 430 IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; } 431 ~IntFlagSetting() { *flag = val; } 432}; 433 434class UIntFlagSetting { 435 uint val; 436 uint* flag; 437 public: 438 UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; } 439 ~UIntFlagSetting() { *flag = val; } 440}; 441 442class UIntXFlagSetting { 443 uintx val; 444 uintx* flag; 445 public: 446 UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 447 ~UIntXFlagSetting() { *flag = val; } 448}; 449 450class DoubleFlagSetting { 451 double val; 452 double* flag; 453 public: 454 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 455 ~DoubleFlagSetting() { *flag = val; } 456}; 457 458class SizeTFlagSetting { 459 size_t val; 460 size_t* flag; 461 public: 462 SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; } 463 ~SizeTFlagSetting() { *flag = val; } 464}; 465 466 467class CommandLineFlags { 468public: 469 static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false); 470 static Flag::Error boolAt(const char* name, bool* value, bool allow_locked = false, bool return_flag = false) { return boolAt(name, strlen(name), value, allow_locked, return_flag); } 471 static Flag::Error boolAtPut(Flag* flag, bool* value, Flag::Flags origin); 472 static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin); 473 static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 474 475 static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false); 476 static Flag::Error intAt(const char* name, int* value, bool allow_locked = false, bool return_flag = false) { return intAt(name, strlen(name), value, allow_locked, return_flag); } 477 static Flag::Error intAtPut(Flag* flag, int* value, Flag::Flags origin); 478 static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin); 479 static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); } 480 481 static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false); 482 static Flag::Error uintAt(const char* name, uint* value, bool allow_locked = false, bool return_flag = false) { return uintAt(name, strlen(name), value, allow_locked, return_flag); } 483 static Flag::Error uintAtPut(Flag* flag, uint* value, Flag::Flags origin); 484 static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin); 485 static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); } 486 487 static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false); 488 static Flag::Error intxAt(const char* name, intx* value, bool allow_locked = false, bool return_flag = false) { return intxAt(name, strlen(name), value, allow_locked, return_flag); } 489 static Flag::Error intxAtPut(Flag* flag, intx* value, Flag::Flags origin); 490 static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin); 491 static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 492 493 static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false); 494 static Flag::Error uintxAt(const char* name, uintx* value, bool allow_locked = false, bool return_flag = false) { return uintxAt(name, strlen(name), value, allow_locked, return_flag); } 495 static Flag::Error uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin); 496 static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin); 497 static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 498 499 static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false); 500 static Flag::Error size_tAt(const char* name, size_t* value, bool allow_locked = false, bool return_flag = false) { return size_tAt(name, strlen(name), value, allow_locked, return_flag); } 501 static Flag::Error size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin); 502 static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin); 503 static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); } 504 505 static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false); 506 static Flag::Error uint64_tAt(const char* name, uint64_t* value, bool allow_locked = false, bool return_flag = false) { return uint64_tAt(name, strlen(name), value, allow_locked, return_flag); } 507 static Flag::Error uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin); 508 static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin); 509 static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 510 511 static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false); 512 static Flag::Error doubleAt(const char* name, double* value, bool allow_locked = false, bool return_flag = false) { return doubleAt(name, strlen(name), value, allow_locked, return_flag); } 513 static Flag::Error doubleAtPut(Flag* flag, double* value, Flag::Flags origin); 514 static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin); 515 static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 516 517 static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false); 518 static Flag::Error ccstrAt(const char* name, ccstr* value, bool allow_locked = false, bool return_flag = false) { return ccstrAt(name, strlen(name), value, allow_locked, return_flag); } 519 // Contract: Flag will make private copy of the incoming value. 520 // Outgoing value is always malloc-ed, and caller MUST call free. 521 static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin); 522 static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 523 524 // Returns false if name is not a command line flag. 525 static bool wasSetOnCmdline(const char* name, bool* value); 526 static void printSetFlags(outputStream* out); 527 528 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 529 static void printFlags(outputStream* out, bool withComments, bool printRanges = false); 530 531 static void verify() PRODUCT_RETURN; 532}; 533 534// use this for flags that are true by default in the debug version but 535// false in the optimized version, and vice versa 536#ifdef ASSERT 537#define trueInDebug true 538#define falseInDebug false 539#else 540#define trueInDebug false 541#define falseInDebug true 542#endif 543 544// use this for flags that are true per default in the product build 545// but false in development builds, and vice versa 546#ifdef PRODUCT 547#define trueInProduct true 548#define falseInProduct false 549#else 550#define trueInProduct false 551#define falseInProduct true 552#endif 553 554#ifdef JAVASE_EMBEDDED 555#define falseInEmbedded false 556#else 557#define falseInEmbedded true 558#endif 559 560// develop flags are settable / visible only during development and are constant in the PRODUCT version 561// product flags are always settable / visible 562// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 563 564// A flag must be declared with one of the following types: 565// bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 566// The type "ccstr" is an alias for "const char*" and is used 567// only in this file, because the macrology requires single-token type names. 568 569// Note: Diagnostic options not meant for VM tuning or for product modes. 570// They are to be used for VM quality assurance or field diagnosis 571// of VM bugs. They are hidden so that users will not be encouraged to 572// try them as if they were VM ordinary execution options. However, they 573// are available in the product version of the VM. Under instruction 574// from support engineers, VM customers can turn them on to collect 575// diagnostic information about VM problems. To use a VM diagnostic 576// option, you must first specify +UnlockDiagnosticVMOptions. 577// (This master switch also affects the behavior of -Xprintflags.) 578// 579// experimental flags are in support of features that are not 580// part of the officially supported product, but are available 581// for experimenting with. They could, for example, be performance 582// features that may not have undergone full or rigorous QA, but which may 583// help performance in some cases and released for experimentation 584// by the community of users and developers. This flag also allows one to 585// be able to build a fully supported product that nonetheless also 586// ships with some unsupported, lightly tested, experimental features. 587// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 588// UnlockExperimentalVMOptions flag, which allows the control and 589// modification of the experimental flags. 590// 591// Nota bene: neither diagnostic nor experimental options should be used casually, 592// and they are not supported on production loads, except under explicit 593// direction from support engineers. 594// 595// manageable flags are writeable external product flags. 596// They are dynamically writeable through the JDK management interface 597// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 598// These flags are external exported interface (see CCC). The list of 599// manageable flags can be queried programmatically through the management 600// interface. 601// 602// A flag can be made as "manageable" only if 603// - the flag is defined in a CCC as an external exported interface. 604// - the VM implementation supports dynamic setting of the flag. 605// This implies that the VM must *always* query the flag variable 606// and not reuse state related to the flag state at any given time. 607// - you want the flag to be queried programmatically by the customers. 608// 609// product_rw flags are writeable internal product flags. 610// They are like "manageable" flags but for internal/private use. 611// The list of product_rw flags are internal/private flags which 612// may be changed/removed in a future release. It can be set 613// through the management interface to get/set value 614// when the name of flag is supplied. 615// 616// A flag can be made as "product_rw" only if 617// - the VM implementation supports dynamic setting of the flag. 618// This implies that the VM must *always* query the flag variable 619// and not reuse state related to the flag state at any given time. 620// 621// Note that when there is a need to support develop flags to be writeable, 622// it can be done in the same way as product_rw. 623// 624// range is a macro that will expand to min and max arguments for range 625// checking code if provided - see commandLineFlagRangeList.hpp 626// 627// constraint is a macro that will expand to custom function call 628// for constraint checking if provided - see commandLineFlagConstraintList.hpp 629// 630// writeable is a macro that controls if and how the value can change during the runtime 631// 632// writeable(Always) is optional and allows the flag to have its value changed 633// without any limitations at any time 634// 635// writeable(Once) flag value's can be only set once during the lifetime of VM 636// 637// writeable(CommandLineOnly) flag value's can be only set from command line 638// (multiple times allowed) 639// 640 641 642#define RUNTIME_FLAGS(develop, \ 643 develop_pd, \ 644 product, \ 645 product_pd, \ 646 diagnostic, \ 647 experimental, \ 648 notproduct, \ 649 manageable, \ 650 product_rw, \ 651 lp64_product, \ 652 range, \ 653 constraint, \ 654 writeable) \ 655 \ 656 lp64_product(bool, UseCompressedOops, false, \ 657 "Use 32-bit object references in 64-bit VM. " \ 658 "lp64_product means flag is always constant in 32 bit VM") \ 659 \ 660 lp64_product(bool, UseCompressedClassPointers, false, \ 661 "Use 32-bit class pointers in 64-bit VM. " \ 662 "lp64_product means flag is always constant in 32 bit VM") \ 663 \ 664 notproduct(bool, CheckCompressedOops, true, \ 665 "Generate checks in encoding/decoding code in debug VM") \ 666 \ 667 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 668 "Heap allocation steps through preferred address regions to find" \ 669 " where it can allocate the heap. Number of steps to take per " \ 670 "region.") \ 671 range(1, max_uintx) \ 672 \ 673 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 674 "Default object alignment in bytes, 8 is minimum") \ 675 range(8, 256) \ 676 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 677 \ 678 product(bool, AssumeMP, false, \ 679 "Instruct the VM to assume multiple processors are available") \ 680 \ 681 /* UseMembar is theoretically a temp flag used for memory barrier */ \ 682 /* removal testing. It was supposed to be removed before FCS but has */ \ 683 /* been re-added (see 6401008) */ \ 684 product_pd(bool, UseMembar, \ 685 "(Unstable) Issues membars on thread state transitions") \ 686 \ 687 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 688 "Clean the chunk pool asynchronously") \ 689 \ 690 experimental(bool, AlwaysSafeConstructors, false, \ 691 "Force safe construction, as if all fields are final.") \ 692 \ 693 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 694 "Enable normal processing of flags relating to field diagnostics")\ 695 \ 696 experimental(bool, UnlockExperimentalVMOptions, false, \ 697 "Enable normal processing of flags relating to experimental " \ 698 "features") \ 699 \ 700 product(bool, JavaMonitorsInStackTrace, true, \ 701 "Print information about Java monitor locks when the stacks are" \ 702 "dumped") \ 703 \ 704 product_pd(bool, UseLargePages, \ 705 "Use large page memory") \ 706 \ 707 product_pd(bool, UseLargePagesIndividualAllocation, \ 708 "Allocate large pages individually for better affinity") \ 709 \ 710 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 711 "Fail large pages individual allocation") \ 712 \ 713 product(bool, UseLargePagesInMetaspace, false, \ 714 "Use large page memory in metaspace. " \ 715 "Only used if UseLargePages is enabled.") \ 716 \ 717 product(bool, UseNUMA, false, \ 718 "Use NUMA if available") \ 719 \ 720 product(bool, UseNUMAInterleaving, false, \ 721 "Interleave memory across NUMA nodes if available") \ 722 \ 723 product(size_t, NUMAInterleaveGranularity, 2*M, \ 724 "Granularity to use for NUMA interleaving on Windows OS") \ 725 range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \ 726 \ 727 product(bool, ForceNUMA, false, \ 728 "Force NUMA optimizations on single-node/UMA systems") \ 729 \ 730 product(uintx, NUMAChunkResizeWeight, 20, \ 731 "Percentage (0-100) used to weight the current sample when " \ 732 "computing exponentially decaying average for " \ 733 "AdaptiveNUMAChunkSizing") \ 734 range(0, 100) \ 735 \ 736 product(size_t, NUMASpaceResizeRate, 1*G, \ 737 "Do not reallocate more than this amount per collection") \ 738 range(0, max_uintx) \ 739 \ 740 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 741 "Enable adaptive chunk sizing for NUMA") \ 742 \ 743 product(bool, NUMAStats, false, \ 744 "Print NUMA stats in detailed heap information") \ 745 \ 746 product(uintx, NUMAPageScanRate, 256, \ 747 "Maximum number of pages to include in the page scan procedure") \ 748 range(0, max_uintx) \ 749 \ 750 product_pd(bool, NeedsDeoptSuspend, \ 751 "True for register window machines (sparc/ia64)") \ 752 \ 753 product(intx, UseSSE, 99, \ 754 "Highest supported SSE instructions set on x86/x64") \ 755 range(0, 99) \ 756 \ 757 product(bool, UseAES, false, \ 758 "Control whether AES instructions can be used on x86/x64") \ 759 \ 760 product(bool, UseSHA, false, \ 761 "Control whether SHA instructions can be used " \ 762 "on SPARC, on ARM and on x86") \ 763 \ 764 product(bool, UseGHASHIntrinsics, false, \ 765 "Use intrinsics for GHASH versions of crypto") \ 766 \ 767 product(size_t, LargePageSizeInBytes, 0, \ 768 "Large page size (0 to let VM choose the page size)") \ 769 range(0, max_uintx) \ 770 \ 771 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 772 "Use large pages if maximum heap is at least this big") \ 773 range(0, max_uintx) \ 774 \ 775 product(bool, ForceTimeHighResolution, false, \ 776 "Using high time resolution (for Win32 only)") \ 777 \ 778 develop(bool, TracePcPatching, false, \ 779 "Trace usage of frame::patch_pc") \ 780 \ 781 develop(bool, TraceJumps, false, \ 782 "Trace assembly jumps in thread ring buffer") \ 783 \ 784 develop(bool, TraceRelocator, false, \ 785 "Trace the bytecode relocator") \ 786 \ 787 develop(bool, TraceLongCompiles, false, \ 788 "Print out every time compilation is longer than " \ 789 "a given threshold") \ 790 \ 791 develop(bool, SafepointALot, false, \ 792 "Generate a lot of safepoints. This works with " \ 793 "GuaranteedSafepointInterval") \ 794 \ 795 product_pd(bool, BackgroundCompilation, \ 796 "A thread requesting compilation is not blocked during " \ 797 "compilation") \ 798 \ 799 product(bool, PrintVMQWaitTime, false, \ 800 "Print out the waiting time in VM operation queue") \ 801 \ 802 develop(bool, TraceOopMapGeneration, false, \ 803 "Show OopMapGeneration") \ 804 \ 805 product(bool, MethodFlushing, true, \ 806 "Reclamation of zombie and not-entrant methods") \ 807 \ 808 develop(bool, VerifyStack, false, \ 809 "Verify stack of each thread when it is entering a runtime call") \ 810 \ 811 diagnostic(bool, ForceUnreachable, false, \ 812 "Make all non code cache addresses to be unreachable by " \ 813 "forcing use of 64bit literal fixups") \ 814 \ 815 notproduct(bool, StressDerivedPointers, false, \ 816 "Force scavenge when a derived pointer is detected on stack " \ 817 "after rtm call") \ 818 \ 819 develop(bool, TraceDerivedPointers, false, \ 820 "Trace traversal of derived pointers on stack") \ 821 \ 822 notproduct(bool, TraceCodeBlobStacks, false, \ 823 "Trace stack-walk of codeblobs") \ 824 \ 825 product(bool, PrintJNIResolving, false, \ 826 "Used to implement -v:jni") \ 827 \ 828 notproduct(bool, PrintRewrites, false, \ 829 "Print methods that are being rewritten") \ 830 \ 831 product(bool, UseInlineCaches, true, \ 832 "Use Inline Caches for virtual calls ") \ 833 \ 834 develop(bool, InlineArrayCopy, true, \ 835 "Inline arraycopy native that is known to be part of " \ 836 "base library DLL") \ 837 \ 838 develop(bool, InlineObjectHash, true, \ 839 "Inline Object::hashCode() native that is known to be part " \ 840 "of base library DLL") \ 841 \ 842 develop(bool, InlineNatives, true, \ 843 "Inline natives that are known to be part of base library DLL") \ 844 \ 845 develop(bool, InlineMathNatives, true, \ 846 "Inline SinD, CosD, etc.") \ 847 \ 848 develop(bool, InlineClassNatives, true, \ 849 "Inline Class.isInstance, etc") \ 850 \ 851 develop(bool, InlineThreadNatives, true, \ 852 "Inline Thread.currentThread, etc") \ 853 \ 854 develop(bool, InlineUnsafeOps, true, \ 855 "Inline memory ops (native methods) from Unsafe") \ 856 \ 857 product(bool, CriticalJNINatives, true, \ 858 "Check for critical JNI entry points") \ 859 \ 860 notproduct(bool, StressCriticalJNINatives, false, \ 861 "Exercise register saving code in critical natives") \ 862 \ 863 product(bool, UseAESIntrinsics, false, \ 864 "Use intrinsics for AES versions of crypto") \ 865 \ 866 product(bool, UseAESCTRIntrinsics, false, \ 867 "Use intrinsics for the paralleled version of AES/CTR crypto") \ 868 \ 869 product(bool, UseSHA1Intrinsics, false, \ 870 "Use intrinsics for SHA-1 crypto hash function. " \ 871 "Requires that UseSHA is enabled.") \ 872 \ 873 product(bool, UseSHA256Intrinsics, false, \ 874 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 875 "Requires that UseSHA is enabled.") \ 876 \ 877 product(bool, UseSHA512Intrinsics, false, \ 878 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 879 "Requires that UseSHA is enabled.") \ 880 \ 881 product(bool, UseCRC32Intrinsics, false, \ 882 "use intrinsics for java.util.zip.CRC32") \ 883 \ 884 product(bool, UseCRC32CIntrinsics, false, \ 885 "use intrinsics for java.util.zip.CRC32C") \ 886 \ 887 product(bool, UseAdler32Intrinsics, false, \ 888 "use intrinsics for java.util.zip.Adler32") \ 889 \ 890 product(bool, UseVectorizedMismatchIntrinsic, false, \ 891 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ 892 \ 893 diagnostic(ccstrlist, DisableIntrinsic, "", \ 894 "do not expand intrinsics whose (internal) names appear here") \ 895 \ 896 develop(bool, TraceCallFixup, false, \ 897 "Trace all call fixups") \ 898 \ 899 develop(bool, DeoptimizeALot, false, \ 900 "Deoptimize at every exit from the runtime system") \ 901 \ 902 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 903 "A comma separated list of bcis to deoptimize at") \ 904 \ 905 product(bool, DeoptimizeRandom, false, \ 906 "Deoptimize random frames on random exit from the runtime system")\ 907 \ 908 notproduct(bool, ZombieALot, false, \ 909 "Create zombies (non-entrant) at exit from the runtime system") \ 910 \ 911 product(bool, UnlinkSymbolsALot, false, \ 912 "Unlink unreferenced symbols from the symbol table at safepoints")\ 913 \ 914 notproduct(bool, WalkStackALot, false, \ 915 "Trace stack (no print) at every exit from the runtime system") \ 916 \ 917 product(bool, Debugging, false, \ 918 "Set when executing debug methods in debug.cpp " \ 919 "(to prevent triggering assertions)") \ 920 \ 921 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 922 "Enable strict checks that safepoints cannot happen for threads " \ 923 "that use NoSafepointVerifier") \ 924 \ 925 notproduct(bool, VerifyLastFrame, false, \ 926 "Verify oops on last frame on entry to VM") \ 927 \ 928 product(bool, FailOverToOldVerifier, true, \ 929 "Fail over to old verifier when split verifier fails") \ 930 \ 931 develop(bool, ShowSafepointMsgs, false, \ 932 "Show message about safepoint synchronization") \ 933 \ 934 product(bool, SafepointTimeout, false, \ 935 "Time out and warn or fail after SafepointTimeoutDelay " \ 936 "milliseconds if failed to reach safepoint") \ 937 \ 938 develop(bool, DieOnSafepointTimeout, false, \ 939 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 940 \ 941 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 942 /* typically, at most a few retries are needed */ \ 943 product(intx, SuspendRetryCount, 50, \ 944 "Maximum retry count for an external suspend request") \ 945 range(0, max_intx) \ 946 \ 947 product(intx, SuspendRetryDelay, 5, \ 948 "Milliseconds to delay per retry (* current_retry_count)") \ 949 range(0, max_intx) \ 950 \ 951 product(bool, AssertOnSuspendWaitFailure, false, \ 952 "Assert/Guarantee on external suspend wait failure") \ 953 \ 954 product(bool, TraceSuspendWaitFailures, false, \ 955 "Trace external suspend wait failures") \ 956 \ 957 product(bool, MaxFDLimit, true, \ 958 "Bump the number of file descriptors to maximum in Solaris") \ 959 \ 960 diagnostic(bool, LogEvents, true, \ 961 "Enable the various ring buffer event logs") \ 962 \ 963 diagnostic(uintx, LogEventsBufferEntries, 10, \ 964 "Number of ring buffer event logs") \ 965 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 966 \ 967 product(bool, BytecodeVerificationRemote, true, \ 968 "Enable the Java bytecode verifier for remote classes") \ 969 \ 970 product(bool, BytecodeVerificationLocal, false, \ 971 "Enable the Java bytecode verifier for local classes") \ 972 \ 973 develop(bool, ForceFloatExceptions, trueInDebug, \ 974 "Force exceptions on FP stack under/overflow") \ 975 \ 976 develop(bool, VerifyStackAtCalls, false, \ 977 "Verify that the stack pointer is unchanged after calls") \ 978 \ 979 develop(bool, TraceJavaAssertions, false, \ 980 "Trace java language assertions") \ 981 \ 982 notproduct(bool, CheckAssertionStatusDirectives, false, \ 983 "Temporary - see javaClasses.cpp") \ 984 \ 985 notproduct(bool, PrintMallocFree, false, \ 986 "Trace calls to C heap malloc/free allocation") \ 987 \ 988 notproduct(bool, VerifyCodeCache, false, \ 989 "Verify code cache on memory allocation/deallocation") \ 990 \ 991 develop(bool, UseMallocOnly, false, \ 992 "Use only malloc/free for allocation (no resource area/arena)") \ 993 \ 994 develop(bool, PrintMalloc, false, \ 995 "Print all malloc/free calls") \ 996 \ 997 develop(bool, PrintMallocStatistics, false, \ 998 "Print malloc/free statistics") \ 999 \ 1000 develop(bool, ZapResourceArea, trueInDebug, \ 1001 "Zap freed resource/arena space with 0xABABABAB") \ 1002 \ 1003 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 1004 "Zap freed VM handle space with 0xBCBCBCBC") \ 1005 \ 1006 develop(bool, ZapJNIHandleArea, trueInDebug, \ 1007 "Zap freed JNI handle space with 0xFEFEFEFE") \ 1008 \ 1009 notproduct(bool, ZapStackSegments, trueInDebug, \ 1010 "Zap allocated/freed stack segments with 0xFADFADED") \ 1011 \ 1012 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 1013 "Zap unused heap space with 0xBAADBABE") \ 1014 \ 1015 develop(bool, CheckZapUnusedHeapArea, false, \ 1016 "Check zapping of unused heap space") \ 1017 \ 1018 develop(bool, ZapFillerObjects, trueInDebug, \ 1019 "Zap filler objects with 0xDEAFBABE") \ 1020 \ 1021 develop(bool, PrintVMMessages, true, \ 1022 "Print VM messages on console") \ 1023 \ 1024 notproduct(uintx, ErrorHandlerTest, 0, \ 1025 "If > 0, provokes an error after VM initialization; the value " \ 1026 "determines which error to provoke. See test_error_handler() " \ 1027 "in debug.cpp.") \ 1028 \ 1029 notproduct(uintx, TestCrashInErrorHandler, 0, \ 1030 "If > 0, provokes an error inside VM error handler (a secondary " \ 1031 "crash). see test_error_handler() in debug.cpp.") \ 1032 \ 1033 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 1034 "If true, tests SafeFetch inside error handler.") \ 1035 \ 1036 develop(bool, Verbose, false, \ 1037 "Print additional debugging information from other modes") \ 1038 \ 1039 develop(bool, PrintMiscellaneous, false, \ 1040 "Print uncategorized debugging information (requires +Verbose)") \ 1041 \ 1042 develop(bool, WizardMode, false, \ 1043 "Print much more debugging information") \ 1044 \ 1045 product(bool, ShowMessageBoxOnError, false, \ 1046 "Keep process alive on VM fatal error") \ 1047 \ 1048 product(bool, CreateCoredumpOnCrash, true, \ 1049 "Create core/mini dump on VM fatal error") \ 1050 \ 1051 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 1052 "Timeout, in seconds, to limit the time spent on writing an " \ 1053 "error log in case of a crash.") \ 1054 range(0, (uint64_t)max_jlong/1000) \ 1055 \ 1056 product_pd(bool, UseOSErrorReporting, \ 1057 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 1058 \ 1059 product(bool, SuppressFatalErrorMessage, false, \ 1060 "Report NO fatal error message (avoid deadlock)") \ 1061 \ 1062 product(ccstrlist, OnError, "", \ 1063 "Run user-defined commands on fatal error; see VMError.cpp " \ 1064 "for examples") \ 1065 \ 1066 product(ccstrlist, OnOutOfMemoryError, "", \ 1067 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 1068 \ 1069 manageable(bool, HeapDumpBeforeFullGC, false, \ 1070 "Dump heap to file before any major stop-the-world GC") \ 1071 \ 1072 manageable(bool, HeapDumpAfterFullGC, false, \ 1073 "Dump heap to file after any major stop-the-world GC") \ 1074 \ 1075 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 1076 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 1077 \ 1078 manageable(ccstr, HeapDumpPath, NULL, \ 1079 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 1080 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 1081 "in the working directory)") \ 1082 \ 1083 develop(bool, BreakAtWarning, false, \ 1084 "Execute breakpoint upon encountering VM warning") \ 1085 \ 1086 develop(bool, UseFakeTimers, false, \ 1087 "Tell whether the VM should use system time or a fake timer") \ 1088 \ 1089 product(ccstr, NativeMemoryTracking, "off", \ 1090 "Native memory tracking options") \ 1091 \ 1092 diagnostic(bool, PrintNMTStatistics, false, \ 1093 "Print native memory tracking summary data if it is on") \ 1094 \ 1095 diagnostic(bool, LogCompilation, false, \ 1096 "Log compilation activity in detail to LogFile") \ 1097 \ 1098 product(bool, PrintCompilation, false, \ 1099 "Print compilations") \ 1100 \ 1101 diagnostic(bool, TraceNMethodInstalls, false, \ 1102 "Trace nmethod installation") \ 1103 \ 1104 diagnostic(intx, ScavengeRootsInCode, 2, \ 1105 "0: do not allow scavengable oops in the code cache; " \ 1106 "1: allow scavenging from the code cache; " \ 1107 "2: emit as many constants as the compiler can see") \ 1108 range(0, 2) \ 1109 \ 1110 product(bool, AlwaysRestoreFPU, false, \ 1111 "Restore the FPU control word after every JNI call (expensive)") \ 1112 \ 1113 diagnostic(bool, PrintCompilation2, false, \ 1114 "Print additional statistics per compilation") \ 1115 \ 1116 diagnostic(bool, PrintAdapterHandlers, false, \ 1117 "Print code generated for i2c/c2i adapters") \ 1118 \ 1119 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 1120 "Verify that i2c/c2i adapters are called properly") \ 1121 \ 1122 develop(bool, VerifyAdapterSharing, false, \ 1123 "Verify that the code for shared adapters is the equivalent") \ 1124 \ 1125 diagnostic(bool, PrintAssembly, false, \ 1126 "Print assembly code (using external disassembler.so)") \ 1127 \ 1128 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 1129 "Print options string passed to disassembler.so") \ 1130 \ 1131 notproduct(bool, PrintNMethodStatistics, false, \ 1132 "Print a summary statistic for the generated nmethods") \ 1133 \ 1134 diagnostic(bool, PrintNMethods, false, \ 1135 "Print assembly code for nmethods when generated") \ 1136 \ 1137 diagnostic(bool, PrintNativeNMethods, false, \ 1138 "Print assembly code for native nmethods when generated") \ 1139 \ 1140 develop(bool, PrintDebugInfo, false, \ 1141 "Print debug information for all nmethods when generated") \ 1142 \ 1143 develop(bool, PrintRelocations, false, \ 1144 "Print relocation information for all nmethods when generated") \ 1145 \ 1146 develop(bool, PrintDependencies, false, \ 1147 "Print dependency information for all nmethods when generated") \ 1148 \ 1149 develop(bool, PrintExceptionHandlers, false, \ 1150 "Print exception handler tables for all nmethods when generated") \ 1151 \ 1152 develop(bool, StressCompiledExceptionHandlers, false, \ 1153 "Exercise compiled exception handlers") \ 1154 \ 1155 develop(bool, InterceptOSException, false, \ 1156 "Start debugger when an implicit OS (e.g. NULL) " \ 1157 "exception happens") \ 1158 \ 1159 product(bool, PrintCodeCache, false, \ 1160 "Print the code cache memory usage when exiting") \ 1161 \ 1162 develop(bool, PrintCodeCache2, false, \ 1163 "Print detailed usage information on the code cache when exiting")\ 1164 \ 1165 product(bool, PrintCodeCacheOnCompilation, false, \ 1166 "Print the code cache memory usage each time a method is " \ 1167 "compiled") \ 1168 \ 1169 diagnostic(bool, PrintStubCode, false, \ 1170 "Print generated stub code") \ 1171 \ 1172 product(bool, StackTraceInThrowable, true, \ 1173 "Collect backtrace in throwable when exception happens") \ 1174 \ 1175 product(bool, OmitStackTraceInFastThrow, true, \ 1176 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1177 \ 1178 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1179 "Print bytecode statistics when dumping profiler output") \ 1180 \ 1181 product(bool, ProfilerRecordPC, false, \ 1182 "Collect ticks for each 16 byte interval of compiled code") \ 1183 \ 1184 product(bool, ProfileVM, false, \ 1185 "Profile ticks that fall within VM (either in the VM Thread " \ 1186 "or VM code called through stubs)") \ 1187 \ 1188 product(bool, ProfileIntervals, false, \ 1189 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1190 \ 1191 notproduct(bool, ProfilerCheckIntervals, false, \ 1192 "Collect and print information on spacing of profiler ticks") \ 1193 \ 1194 product(bool, PrintWarnings, true, \ 1195 "Print JVM warnings to output stream") \ 1196 \ 1197 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1198 "Print warnings for stalled SpinLocks") \ 1199 \ 1200 product(bool, RegisterFinalizersAtInit, true, \ 1201 "Register finalizable objects at end of Object.<init> or " \ 1202 "after allocation") \ 1203 \ 1204 develop(bool, RegisterReferences, true, \ 1205 "Tell whether the VM should register soft/weak/final/phantom " \ 1206 "references") \ 1207 \ 1208 develop(bool, IgnoreRewrites, false, \ 1209 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1210 "This is unsafe!") \ 1211 \ 1212 develop(bool, PrintCodeCacheExtension, false, \ 1213 "Print extension of code cache") \ 1214 \ 1215 develop(bool, UsePrivilegedStack, true, \ 1216 "Enable the security JVM functions") \ 1217 \ 1218 develop(bool, ProtectionDomainVerification, true, \ 1219 "Verify protection domain before resolution in system dictionary")\ 1220 \ 1221 product(bool, ClassUnloading, true, \ 1222 "Do unloading of classes") \ 1223 \ 1224 product(bool, ClassUnloadingWithConcurrentMark, true, \ 1225 "Do unloading of classes with a concurrent marking cycle") \ 1226 \ 1227 develop(bool, DisableStartThread, false, \ 1228 "Disable starting of additional Java threads " \ 1229 "(for debugging only)") \ 1230 \ 1231 develop(bool, MemProfiling, false, \ 1232 "Write memory usage profiling to log file") \ 1233 \ 1234 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1235 "Print the system dictionary at exit") \ 1236 \ 1237 experimental(intx, PredictedLoadedClassCount, 0, \ 1238 "Experimental: Tune loaded class cache starting size") \ 1239 \ 1240 diagnostic(bool, UnsyncloadClass, false, \ 1241 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1242 "class loader must call VM synchronized for findClass " \ 1243 "and defineClass.") \ 1244 \ 1245 product(bool, AlwaysLockClassLoader, false, \ 1246 "Require the VM to acquire the class loader lock before calling " \ 1247 "loadClass() even for class loaders registering " \ 1248 "as parallel capable") \ 1249 \ 1250 product(bool, AllowParallelDefineClass, false, \ 1251 "Allow parallel defineClass requests for class loaders " \ 1252 "registering as parallel capable") \ 1253 \ 1254 product(bool, MustCallLoadClassInternal, false, \ 1255 "Call loadClassInternal() rather than loadClass()") \ 1256 \ 1257 product_pd(bool, DontYieldALot, \ 1258 "Throw away obvious excess yield calls") \ 1259 \ 1260 product(bool, ConvertSleepToYield, true, \ 1261 "Convert sleep(0) to thread yield ") \ 1262 \ 1263 product(bool, ConvertYieldToSleep, false, \ 1264 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1265 "behavior") \ 1266 \ 1267 develop(bool, UseDetachedThreads, true, \ 1268 "Use detached threads that are recycled upon termination " \ 1269 "(for Solaris only)") \ 1270 \ 1271 product(bool, UseLWPSynchronization, true, \ 1272 "Use LWP-based instead of libthread-based synchronization " \ 1273 "(SPARC only)") \ 1274 \ 1275 experimental(ccstr, SyncKnobs, NULL, \ 1276 "(Unstable) Various monitor synchronization tunables") \ 1277 \ 1278 experimental(intx, EmitSync, 0, \ 1279 "(Unsafe, Unstable) " \ 1280 "Control emission of inline sync fast-path code") \ 1281 \ 1282 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1283 range(0, max_jint) \ 1284 \ 1285 product(bool, MonitorInUseLists, true, "Track Monitors for Deflation") \ 1286 \ 1287 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1288 "Experimental Sync flags") \ 1289 \ 1290 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1291 \ 1292 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \ 1293 \ 1294 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1295 \ 1296 experimental(intx, hashCode, 5, \ 1297 "(Unstable) select hashCode generation algorithm") \ 1298 \ 1299 product(bool, FilterSpuriousWakeups, true, \ 1300 "When true prevents OS-level spurious, or premature, wakeups " \ 1301 "from Object.wait (Ignored for Windows)") \ 1302 \ 1303 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1304 \ 1305 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1306 \ 1307 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1308 \ 1309 develop(bool, UsePthreads, false, \ 1310 "Use pthread-based instead of libthread-based synchronization " \ 1311 "(SPARC only)") \ 1312 \ 1313 product(bool, ReduceSignalUsage, false, \ 1314 "Reduce the use of OS signals in Java and/or the VM") \ 1315 \ 1316 develop_pd(bool, ShareVtableStubs, \ 1317 "Share vtable stubs (smaller code but worse branch prediction") \ 1318 \ 1319 develop(bool, LoadLineNumberTables, true, \ 1320 "Tell whether the class file parser loads line number tables") \ 1321 \ 1322 develop(bool, LoadLocalVariableTables, true, \ 1323 "Tell whether the class file parser loads local variable tables") \ 1324 \ 1325 develop(bool, LoadLocalVariableTypeTables, true, \ 1326 "Tell whether the class file parser loads local variable type" \ 1327 "tables") \ 1328 \ 1329 product(bool, AllowUserSignalHandlers, false, \ 1330 "Do not complain if the application installs signal handlers " \ 1331 "(Solaris & Linux only)") \ 1332 \ 1333 product(bool, UseSignalChaining, true, \ 1334 "Use signal-chaining to invoke signal handlers installed " \ 1335 "by the application (Solaris & Linux only)") \ 1336 \ 1337 product(bool, AllowJNIEnvProxy, false, \ 1338 "Allow JNIEnv proxies for jdbx") \ 1339 \ 1340 product(bool, RestoreMXCSROnJNICalls, false, \ 1341 "Restore MXCSR when returning from JNI calls") \ 1342 \ 1343 product(bool, CheckJNICalls, false, \ 1344 "Verify all arguments to JNI calls") \ 1345 \ 1346 product(bool, CheckEndorsedAndExtDirs, false, \ 1347 "Verify the endorsed and extension directories are not used") \ 1348 \ 1349 product(bool, UseFastJNIAccessors, true, \ 1350 "Use optimized versions of Get<Primitive>Field") \ 1351 \ 1352 product(intx, MaxJNILocalCapacity, 65536, \ 1353 "Maximum allowable local JNI handle capacity to " \ 1354 "EnsureLocalCapacity() and PushLocalFrame(), " \ 1355 "where <= 0 is unlimited, default: 65536") \ 1356 range(min_intx, max_intx) \ 1357 \ 1358 product(bool, EagerXrunInit, false, \ 1359 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1360 "but not all -Xrun libraries may support the state of the VM " \ 1361 "at this time") \ 1362 \ 1363 product(bool, PreserveAllAnnotations, false, \ 1364 "Preserve RuntimeInvisibleAnnotations as well " \ 1365 "as RuntimeVisibleAnnotations") \ 1366 \ 1367 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1368 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1369 \ 1370 product(bool, UseXMMForArrayCopy, false, \ 1371 "Use SSE2 MOVQ instruction for Arraycopy") \ 1372 \ 1373 product(intx, FieldsAllocationStyle, 1, \ 1374 "0 - type based with oops first, " \ 1375 "1 - with oops last, " \ 1376 "2 - oops in super and sub classes are together") \ 1377 range(0, 2) \ 1378 \ 1379 product(bool, CompactFields, true, \ 1380 "Allocate nonstatic fields in gaps between previous fields") \ 1381 \ 1382 notproduct(bool, PrintFieldLayout, false, \ 1383 "Print field layout for each class") \ 1384 \ 1385 /* Need to limit the extent of the padding to reasonable size. */\ 1386 /* 8K is well beyond the reasonable HW cache line size, even with */\ 1387 /* aggressive prefetching, while still leaving the room for segregating */\ 1388 /* among the distinct pages. */\ 1389 product(intx, ContendedPaddingWidth, 128, \ 1390 "How many bytes to pad the fields/classes marked @Contended with")\ 1391 range(0, 8192) \ 1392 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 1393 \ 1394 product(bool, EnableContended, true, \ 1395 "Enable @Contended annotation support") \ 1396 \ 1397 product(bool, RestrictContended, true, \ 1398 "Restrict @Contended to trusted classes") \ 1399 \ 1400 product(bool, UseBiasedLocking, true, \ 1401 "Enable biased locking in JVM") \ 1402 \ 1403 product(intx, BiasedLockingStartupDelay, 4000, \ 1404 "Number of milliseconds to wait before enabling biased locking") \ 1405 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 1406 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 1407 \ 1408 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1409 "Print statistics of biased locking in JVM") \ 1410 \ 1411 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1412 "Threshold of number of revocations per type to try to " \ 1413 "rebias all objects in the heap of that type") \ 1414 range(0, max_intx) \ 1415 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 1416 \ 1417 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1418 "Threshold of number of revocations per type to permanently " \ 1419 "revoke biases of all objects in the heap of that type") \ 1420 range(0, max_intx) \ 1421 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 1422 \ 1423 product(intx, BiasedLockingDecayTime, 25000, \ 1424 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1425 "type after previous bulk rebias") \ 1426 range(500, max_intx) \ 1427 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 1428 \ 1429 product(bool, ExitOnOutOfMemoryError, false, \ 1430 "JVM exits on the first occurrence of an out-of-memory error") \ 1431 \ 1432 product(bool, CrashOnOutOfMemoryError, false, \ 1433 "JVM aborts, producing an error log and core/mini dump, on the " \ 1434 "first occurrence of an out-of-memory error") \ 1435 \ 1436 /* tracing */ \ 1437 \ 1438 develop(bool, StressRewriter, false, \ 1439 "Stress linktime bytecode rewriting") \ 1440 \ 1441 product(ccstr, TraceJVMTI, NULL, \ 1442 "Trace flags for JVMTI functions and events") \ 1443 \ 1444 /* This option can change an EMCP method into an obsolete method. */ \ 1445 /* This can affect tests that except specific methods to be EMCP. */ \ 1446 /* This option should be used with caution. */ \ 1447 product(bool, StressLdcRewrite, false, \ 1448 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1449 \ 1450 /* change to false by default sometime after Mustang */ \ 1451 product(bool, VerifyMergedCPBytecodes, true, \ 1452 "Verify bytecodes after RedefineClasses constant pool merging") \ 1453 \ 1454 develop(bool, TraceBytecodes, false, \ 1455 "Trace bytecode execution") \ 1456 \ 1457 develop(bool, TraceICs, false, \ 1458 "Trace inline cache changes") \ 1459 \ 1460 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1461 "Trace method invocation counter overflow") \ 1462 \ 1463 develop(bool, TraceInlineCacheClearing, false, \ 1464 "Trace clearing of inline caches in nmethods") \ 1465 \ 1466 develop(bool, TraceDependencies, false, \ 1467 "Trace dependencies") \ 1468 \ 1469 develop(bool, VerifyDependencies, trueInDebug, \ 1470 "Exercise and verify the compilation dependency mechanism") \ 1471 \ 1472 develop(bool, TraceNewOopMapGeneration, false, \ 1473 "Trace OopMapGeneration") \ 1474 \ 1475 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1476 "Trace OopMapGeneration: print detailed cell states") \ 1477 \ 1478 develop(bool, TimeOopMap, false, \ 1479 "Time calls to GenerateOopMap::compute_map() in sum") \ 1480 \ 1481 develop(bool, TimeOopMap2, false, \ 1482 "Time calls to GenerateOopMap::compute_map() individually") \ 1483 \ 1484 develop(bool, TraceOopMapRewrites, false, \ 1485 "Trace rewriting of method oops during oop map generation") \ 1486 \ 1487 develop(bool, TraceICBuffer, false, \ 1488 "Trace usage of IC buffer") \ 1489 \ 1490 develop(bool, TraceCompiledIC, false, \ 1491 "Trace changes of compiled IC") \ 1492 \ 1493 /* gc */ \ 1494 \ 1495 product(bool, UseSerialGC, false, \ 1496 "Use the Serial garbage collector") \ 1497 \ 1498 product(bool, UseG1GC, false, \ 1499 "Use the Garbage-First garbage collector") \ 1500 \ 1501 product(bool, UseParallelGC, false, \ 1502 "Use the Parallel Scavenge garbage collector") \ 1503 \ 1504 product(bool, UseParallelOldGC, false, \ 1505 "Use the Parallel Old garbage collector") \ 1506 \ 1507 product(uintx, HeapMaximumCompactionInterval, 20, \ 1508 "How often should we maximally compact the heap (not allowing " \ 1509 "any dead space)") \ 1510 range(0, max_uintx) \ 1511 \ 1512 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1513 "The collection count for the first maximum compaction") \ 1514 range(0, max_uintx) \ 1515 \ 1516 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1517 "Use maximum compaction in the Parallel Old garbage collector " \ 1518 "for a system GC") \ 1519 \ 1520 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1521 "The mean used by the parallel compact dead wood " \ 1522 "limiter (a number between 0-100)") \ 1523 range(0, 100) \ 1524 \ 1525 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1526 "The standard deviation used by the parallel compact dead wood " \ 1527 "limiter (a number between 0-100)") \ 1528 range(0, 100) \ 1529 \ 1530 product(uint, ParallelGCThreads, 0, \ 1531 "Number of parallel threads parallel gc will use") \ 1532 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \ 1533 \ 1534 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \ 1535 "Use semaphore synchronization for the GC Threads, " \ 1536 "instead of synchronization based on mutexes") \ 1537 \ 1538 product(bool, UseDynamicNumberOfGCThreads, false, \ 1539 "Dynamically choose the number of parallel threads " \ 1540 "parallel gc will use") \ 1541 \ 1542 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1543 "Force dynamic selection of the number of " \ 1544 "parallel threads parallel gc will use to aid debugging") \ 1545 \ 1546 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1547 "Size of heap (bytes) per GC thread used in calculating the " \ 1548 "number of GC threads") \ 1549 range((size_t)os::vm_page_size(), (size_t)max_uintx) \ 1550 \ 1551 product(uint, ConcGCThreads, 0, \ 1552 "Number of threads concurrent gc will use") \ 1553 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \ 1554 \ 1555 product(uintx, GCTaskTimeStampEntries, 200, \ 1556 "Number of time stamp entries per gc worker thread") \ 1557 range(1, max_uintx) \ 1558 \ 1559 product(bool, AlwaysTenure, false, \ 1560 "Always tenure objects in eden (ParallelGC only)") \ 1561 \ 1562 product(bool, NeverTenure, false, \ 1563 "Never tenure objects in eden, may tenure on overflow " \ 1564 "(ParallelGC only)") \ 1565 \ 1566 product(bool, ScavengeBeforeFullGC, true, \ 1567 "Scavenge youngest generation before each full GC.") \ 1568 \ 1569 product(bool, UseConcMarkSweepGC, false, \ 1570 "Use Concurrent Mark-Sweep GC in the old generation") \ 1571 \ 1572 product(bool, ExplicitGCInvokesConcurrent, false, \ 1573 "A System.gc() request invokes a concurrent collection; " \ 1574 "(effective only when using concurrent collectors)") \ 1575 \ 1576 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1577 "A System.gc() request invokes a concurrent collection and " \ 1578 "also unloads classes during such a concurrent gc cycle " \ 1579 "(effective only when UseConcMarkSweepGC)") \ 1580 \ 1581 product(bool, GCLockerInvokesConcurrent, false, \ 1582 "The exit of a JNI critical section necessitating a scavenge, " \ 1583 "also kicks off a background concurrent collection") \ 1584 \ 1585 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1586 "How much the GC can expand the eden by while the GC locker " \ 1587 "is active (as a percentage)") \ 1588 range(0, 100) \ 1589 \ 1590 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1591 "Number of times to retry allocations when " \ 1592 "blocked by the GC locker") \ 1593 range(0, max_uintx) \ 1594 \ 1595 product(bool, UseCMSBestFit, true, \ 1596 "Use CMS best fit allocation strategy") \ 1597 \ 1598 product(bool, UseParNewGC, false, \ 1599 "Use parallel threads in the new generation") \ 1600 \ 1601 product(uintx, ParallelGCBufferWastePct, 10, \ 1602 "Wasted fraction of parallel allocation buffer") \ 1603 range(0, 100) \ 1604 \ 1605 product(uintx, TargetPLABWastePct, 10, \ 1606 "Target wasted space in last buffer as percent of overall " \ 1607 "allocation") \ 1608 range(1, 100) \ 1609 \ 1610 product(uintx, PLABWeight, 75, \ 1611 "Percentage (0-100) used to weight the current sample when " \ 1612 "computing exponentially decaying average for ResizePLAB") \ 1613 range(0, 100) \ 1614 \ 1615 product(bool, ResizePLAB, true, \ 1616 "Dynamically resize (survivor space) promotion LAB's") \ 1617 \ 1618 product(int, ParGCArrayScanChunk, 50, \ 1619 "Scan a subset of object array and push remainder, if array is " \ 1620 "bigger than this") \ 1621 range(1, max_jint/3) \ 1622 \ 1623 product(bool, ParGCUseLocalOverflow, false, \ 1624 "Instead of a global overflow list, use local overflow stacks") \ 1625 \ 1626 product(bool, ParGCTrimOverflow, true, \ 1627 "Eagerly trim the local overflow lists " \ 1628 "(when ParGCUseLocalOverflow)") \ 1629 \ 1630 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1631 "Simulate work queue overflow in ParNew") \ 1632 \ 1633 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1634 "An `interval' counter that determines how frequently " \ 1635 "we simulate overflow; a smaller number increases frequency") \ 1636 \ 1637 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1638 "The desired number of objects to claim from the overflow list") \ 1639 range(0, max_uintx) \ 1640 \ 1641 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1642 "The number of strides per worker thread that we divide up the " \ 1643 "card table scanning work into") \ 1644 range(1, max_uintx) \ 1645 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \ 1646 \ 1647 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1648 "The number of cards in each chunk of the parallel chunks used " \ 1649 "during card table scanning") \ 1650 range(1, max_intx) \ 1651 constraint(ParGCCardsPerStrideChunkConstraintFunc,AfterMemoryInit)\ 1652 \ 1653 product(uintx, OldPLABWeight, 50, \ 1654 "Percentage (0-100) used to weight the current sample when " \ 1655 "computing exponentially decaying average for resizing " \ 1656 "OldPLABSize") \ 1657 range(0, 100) \ 1658 \ 1659 product(bool, ResizeOldPLAB, true, \ 1660 "Dynamically resize (old gen) promotion LAB's") \ 1661 \ 1662 product(size_t, CMSOldPLABMax, 1024, \ 1663 "Maximum size of CMS gen promotion LAB caches per worker " \ 1664 "per block size") \ 1665 range(1, max_uintx) \ 1666 constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \ 1667 \ 1668 product(size_t, CMSOldPLABMin, 16, \ 1669 "Minimum size of CMS gen promotion LAB caches per worker " \ 1670 "per block size") \ 1671 range(1, max_uintx) \ 1672 constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \ 1673 \ 1674 product(uintx, CMSOldPLABNumRefills, 4, \ 1675 "Nominal number of refills of CMS gen promotion LAB cache " \ 1676 "per worker per block size") \ 1677 range(1, max_uintx) \ 1678 \ 1679 product(bool, CMSOldPLABResizeQuicker, false, \ 1680 "React on-the-fly during a scavenge to a sudden " \ 1681 "change in block demand rate") \ 1682 \ 1683 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1684 "The tolerance of the phase-change detector for on-the-fly " \ 1685 "PLAB resizing during a scavenge") \ 1686 range(1, max_uintx) \ 1687 \ 1688 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1689 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1690 "during a scavenge") \ 1691 range(1, max_uintx) \ 1692 \ 1693 product(bool, AlwaysPreTouch, false, \ 1694 "Force all freshly committed pages to be pre-touched") \ 1695 \ 1696 product_pd(size_t, CMSYoungGenPerWorker, \ 1697 "The maximum size of young gen chosen by default per GC worker " \ 1698 "thread available") \ 1699 range(1, max_uintx) \ 1700 \ 1701 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1702 "Percentage (0-100) used to add conservatism when computing the " \ 1703 "duty cycle") \ 1704 range(0, 100) \ 1705 \ 1706 product(uintx, CMSExpAvgFactor, 50, \ 1707 "Percentage (0-100) used to weight the current sample when " \ 1708 "computing exponential averages for CMS statistics") \ 1709 range(0, 100) \ 1710 \ 1711 product(uintx, CMS_FLSWeight, 75, \ 1712 "Percentage (0-100) used to weight the current sample when " \ 1713 "computing exponentially decaying averages for CMS FLS " \ 1714 "statistics") \ 1715 range(0, 100) \ 1716 \ 1717 product(uintx, CMS_FLSPadding, 1, \ 1718 "The multiple of deviation from mean to use for buffering " \ 1719 "against volatility in free list demand") \ 1720 range(0, max_juint) \ 1721 \ 1722 product(uintx, FLSCoalescePolicy, 2, \ 1723 "CMS: aggressiveness level for coalescing, increasing " \ 1724 "from 0 to 4") \ 1725 range(0, 4) \ 1726 \ 1727 product(bool, FLSAlwaysCoalesceLarge, false, \ 1728 "CMS: larger free blocks are always available for coalescing") \ 1729 \ 1730 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1731 "CMS: the smaller the percentage the greater the coalescing " \ 1732 "force") \ 1733 range(0.0, 1.0) \ 1734 \ 1735 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1736 "CMS: the factor by which to inflate estimated demand of small " \ 1737 "block sizes to prevent coalescing with an adjoining block") \ 1738 range(0.0, DBL_MAX) \ 1739 \ 1740 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1741 "CMS: the factor by which to inflate estimated demand of large " \ 1742 "block sizes to prevent coalescing with an adjoining block") \ 1743 range(0.0, DBL_MAX) \ 1744 \ 1745 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1746 "CMS: the factor by which to inflate estimated demand of small " \ 1747 "block sizes to prevent splitting to supply demand for smaller " \ 1748 "blocks") \ 1749 range(0.0, DBL_MAX) \ 1750 \ 1751 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1752 "CMS: the factor by which to inflate estimated demand of large " \ 1753 "block sizes to prevent splitting to supply demand for smaller " \ 1754 "blocks") \ 1755 range(0.0, DBL_MAX) \ 1756 \ 1757 product(bool, CMSExtrapolateSweep, false, \ 1758 "CMS: cushion for block demand during sweep") \ 1759 \ 1760 product(uintx, CMS_SweepWeight, 75, \ 1761 "Percentage (0-100) used to weight the current sample when " \ 1762 "computing exponentially decaying average for inter-sweep " \ 1763 "duration") \ 1764 range(0, 100) \ 1765 \ 1766 product(uintx, CMS_SweepPadding, 1, \ 1767 "The multiple of deviation from mean to use for buffering " \ 1768 "against volatility in inter-sweep duration") \ 1769 range(0, max_juint) \ 1770 \ 1771 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1772 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1773 "duration exceeds this threshold in milliseconds") \ 1774 range(0, max_uintx) \ 1775 \ 1776 product(bool, CMSClassUnloadingEnabled, true, \ 1777 "Whether class unloading enabled when using CMS GC") \ 1778 \ 1779 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1780 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1781 "count for which classes may not be unloaded") \ 1782 range(0, max_uintx) \ 1783 \ 1784 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1785 "Replenish an indexed free list with this number of chunks") \ 1786 range(1, max_uintx) \ 1787 \ 1788 product(bool, CMSReplenishIntermediate, true, \ 1789 "Replenish all intermediate free-list caches") \ 1790 \ 1791 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1792 "When satisfying batched demand, split blocks from the " \ 1793 "IndexedFreeList whose size is a multiple of requested size") \ 1794 \ 1795 product(bool, CMSLoopWarn, false, \ 1796 "Warn in case of excessive CMS looping") \ 1797 \ 1798 /* where does the range max value of (max_jint - 1) come from? */ \ 1799 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1800 "Maximum size of marking stack") \ 1801 range(1, (max_jint - 1)) \ 1802 \ 1803 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1804 "Size of marking stack") \ 1805 constraint(MarkStackSizeConstraintFunc,AfterErgo) \ 1806 \ 1807 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1808 "Simulate frequent marking stack / work queue overflow") \ 1809 \ 1810 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1811 "An \"interval\" counter that determines how frequently " \ 1812 "to simulate overflow; a smaller number increases frequency") \ 1813 \ 1814 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1815 "Maximum number of abortable preclean iterations, if > 0") \ 1816 range(0, max_uintx) \ 1817 \ 1818 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1819 "Maximum time in abortable preclean (in milliseconds)") \ 1820 range(0, max_intx) \ 1821 \ 1822 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1823 "Nominal minimum work per abortable preclean iteration") \ 1824 range(0, max_uintx) \ 1825 \ 1826 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1827 "Time that we sleep between iterations when not given " \ 1828 "enough work per iteration") \ 1829 range(0, max_intx) \ 1830 \ 1831 /* 4096 = CardTableModRefBS::card_size_in_words * BitsPerWord */ \ 1832 product(size_t, CMSRescanMultiple, 32, \ 1833 "Size (in cards) of CMS parallel rescan task") \ 1834 range(1, SIZE_MAX / 4096) \ 1835 constraint(CMSRescanMultipleConstraintFunc,AfterMemoryInit) \ 1836 \ 1837 /* 4096 = CardTableModRefBS::card_size_in_words * BitsPerWord */ \ 1838 product(size_t, CMSConcMarkMultiple, 32, \ 1839 "Size (in cards) of CMS concurrent MT marking task") \ 1840 range(1, SIZE_MAX / 4096) \ 1841 constraint(CMSConcMarkMultipleConstraintFunc,AfterMemoryInit) \ 1842 \ 1843 product(bool, CMSAbortSemantics, false, \ 1844 "Whether abort-on-overflow semantics is implemented") \ 1845 \ 1846 product(bool, CMSParallelInitialMarkEnabled, true, \ 1847 "Use the parallel initial mark.") \ 1848 \ 1849 product(bool, CMSParallelRemarkEnabled, true, \ 1850 "Whether parallel remark enabled (only if ParNewGC)") \ 1851 \ 1852 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1853 "Whether parallel remark of survivor space " \ 1854 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1855 \ 1856 product(bool, CMSPLABRecordAlways, true, \ 1857 "Always record survivor space PLAB boundaries (effective only " \ 1858 "if CMSParallelSurvivorRemarkEnabled)") \ 1859 \ 1860 product(bool, CMSEdenChunksRecordAlways, true, \ 1861 "Always record eden chunks used for the parallel initial mark " \ 1862 "or remark of eden") \ 1863 \ 1864 product(bool, CMSConcurrentMTEnabled, true, \ 1865 "Whether multi-threaded concurrent work enabled " \ 1866 "(effective only if ParNewGC)") \ 1867 \ 1868 product(bool, CMSPrecleaningEnabled, true, \ 1869 "Whether concurrent precleaning enabled") \ 1870 \ 1871 product(uintx, CMSPrecleanIter, 3, \ 1872 "Maximum number of precleaning iteration passes") \ 1873 range(0, 9) \ 1874 \ 1875 product(uintx, CMSPrecleanDenominator, 3, \ 1876 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1877 "ratio") \ 1878 range(1, max_uintx) \ 1879 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \ 1880 \ 1881 product(uintx, CMSPrecleanNumerator, 2, \ 1882 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1883 "ratio") \ 1884 range(0, max_uintx-1) \ 1885 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \ 1886 \ 1887 product(bool, CMSPrecleanRefLists1, true, \ 1888 "Preclean ref lists during (initial) preclean phase") \ 1889 \ 1890 product(bool, CMSPrecleanRefLists2, false, \ 1891 "Preclean ref lists during abortable preclean phase") \ 1892 \ 1893 product(bool, CMSPrecleanSurvivors1, false, \ 1894 "Preclean survivors during (initial) preclean phase") \ 1895 \ 1896 product(bool, CMSPrecleanSurvivors2, true, \ 1897 "Preclean survivors during abortable preclean phase") \ 1898 \ 1899 product(uintx, CMSPrecleanThreshold, 1000, \ 1900 "Do not iterate again if number of dirty cards is less than this")\ 1901 range(100, max_uintx) \ 1902 \ 1903 product(bool, CMSCleanOnEnter, true, \ 1904 "Clean-on-enter optimization for reducing number of dirty cards") \ 1905 \ 1906 product(uintx, CMSRemarkVerifyVariant, 1, \ 1907 "Choose variant (1,2) of verification following remark") \ 1908 range(1, 2) \ 1909 \ 1910 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1911 "If Eden size is below this, do not try to schedule remark") \ 1912 range(0, max_uintx) \ 1913 \ 1914 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1915 "The Eden occupancy percentage (0-100) at which " \ 1916 "to try and schedule remark pause") \ 1917 range(0, 100) \ 1918 \ 1919 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1920 "Start sampling eden top at least before young gen " \ 1921 "occupancy reaches 1/<ratio> of the size at which " \ 1922 "we plan to schedule remark") \ 1923 range(1, max_uintx) \ 1924 \ 1925 product(uintx, CMSSamplingGrain, 16*K, \ 1926 "The minimum distance between eden samples for CMS (see above)") \ 1927 range(ObjectAlignmentInBytes, max_uintx) \ 1928 constraint(CMSSamplingGrainConstraintFunc,AfterMemoryInit) \ 1929 \ 1930 product(bool, CMSScavengeBeforeRemark, false, \ 1931 "Attempt scavenge before the CMS remark step") \ 1932 \ 1933 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1934 "Don't drain below this size per parallel worker/thief") \ 1935 range(1, max_juint) \ 1936 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \ 1937 \ 1938 manageable(intx, CMSWaitDuration, 2000, \ 1939 "Time in milliseconds that CMS thread waits for young GC") \ 1940 range(min_jint, max_jint) \ 1941 \ 1942 develop(uintx, CMSCheckInterval, 1000, \ 1943 "Interval in milliseconds that CMS thread checks if it " \ 1944 "should start a collection cycle") \ 1945 \ 1946 product(bool, CMSYield, true, \ 1947 "Yield between steps of CMS") \ 1948 \ 1949 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1950 "Bitmap operations should process at most this many bits " \ 1951 "between yields") \ 1952 range(1, max_uintx) \ 1953 constraint(CMSBitMapYieldQuantumConstraintFunc,AfterMemoryInit) \ 1954 \ 1955 product(bool, CMSPrintChunksInDump, false, \ 1956 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \ 1957 "trace level include more detailed information about the" \ 1958 "free chunks") \ 1959 \ 1960 product(bool, CMSPrintObjectsInDump, false, \ 1961 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \ 1962 "trace level include more detailed information about the" \ 1963 "allocated objects") \ 1964 \ 1965 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1966 "Verify that all references across the FLS boundary " \ 1967 "are to valid objects") \ 1968 \ 1969 diagnostic(bool, FLSVerifyLists, false, \ 1970 "Do lots of (expensive) FreeListSpace verification") \ 1971 \ 1972 diagnostic(bool, FLSVerifyIndexTable, false, \ 1973 "Do lots of (expensive) FLS index table verification") \ 1974 \ 1975 develop(bool, FLSVerifyDictionary, false, \ 1976 "Do lots of (expensive) FLS dictionary verification") \ 1977 \ 1978 develop(bool, VerifyBlockOffsetArray, false, \ 1979 "Do (expensive) block offset array verification") \ 1980 \ 1981 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1982 "Maintain _unallocated_block in BlockOffsetArray " \ 1983 "(currently applicable only to CMS collector)") \ 1984 \ 1985 product(intx, RefDiscoveryPolicy, 0, \ 1986 "Select type of reference discovery policy: " \ 1987 "reference-based(0) or referent-based(1)") \ 1988 range(ReferenceProcessor::DiscoveryPolicyMin, \ 1989 ReferenceProcessor::DiscoveryPolicyMax) \ 1990 \ 1991 product(bool, ParallelRefProcEnabled, false, \ 1992 "Enable parallel reference processing whenever possible") \ 1993 \ 1994 product(bool, ParallelRefProcBalancingEnabled, true, \ 1995 "Enable balancing of reference processing queues") \ 1996 \ 1997 product(uintx, CMSTriggerRatio, 80, \ 1998 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1999 "allocated before a CMS collection cycle commences") \ 2000 range(0, 100) \ 2001 \ 2002 product(uintx, CMSBootstrapOccupancy, 50, \ 2003 "Percentage CMS generation occupancy at which to " \ 2004 "initiate CMS collection for bootstrapping collection stats") \ 2005 range(0, 100) \ 2006 \ 2007 product(intx, CMSInitiatingOccupancyFraction, -1, \ 2008 "Percentage CMS generation occupancy to start a CMS collection " \ 2009 "cycle. A negative value means that CMSTriggerRatio is used") \ 2010 range(min_intx, 100) \ 2011 \ 2012 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 2013 "The percent occupancy (IHOP) of the current old generation " \ 2014 "capacity above which a concurrent mark cycle will be initiated " \ 2015 "Its value may change over time if adaptive IHOP is enabled, " \ 2016 "otherwise the value remains constant. " \ 2017 "In the latter case a value of 0 will result as frequent as " \ 2018 "possible concurrent marking cycles. A value of 100 disables " \ 2019 "concurrent marking. " \ 2020 "Fragmentation waste in the old generation is not considered " \ 2021 "free space in this calculation. (G1 collector only)") \ 2022 range(0, 100) \ 2023 \ 2024 manageable(intx, CMSTriggerInterval, -1, \ 2025 "Commence a CMS collection cycle (at least) every so many " \ 2026 "milliseconds (0 permanently, -1 disabled)") \ 2027 range(-1, max_intx) \ 2028 \ 2029 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2030 "Only use occupancy as a criterion for starting a CMS collection")\ 2031 \ 2032 product(uintx, CMSIsTooFullPercentage, 98, \ 2033 "An absolute ceiling above which CMS will always consider the " \ 2034 "unloading of classes when class unloading is enabled") \ 2035 range(0, 100) \ 2036 \ 2037 develop(bool, CMSTestInFreeList, false, \ 2038 "Check if the coalesced range is already in the " \ 2039 "free lists as claimed") \ 2040 \ 2041 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2042 "Check that all the garbage collected was returned to the " \ 2043 "free lists") \ 2044 \ 2045 notproduct(bool, ScavengeALot, false, \ 2046 "Force scavenge at every Nth exit from the runtime system " \ 2047 "(N=ScavengeALotInterval)") \ 2048 \ 2049 develop(bool, FullGCALot, false, \ 2050 "Force full gc at every Nth exit from the runtime system " \ 2051 "(N=FullGCALotInterval)") \ 2052 \ 2053 notproduct(bool, GCALotAtAllSafepoints, false, \ 2054 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2055 \ 2056 notproduct(bool, PromotionFailureALot, false, \ 2057 "Use promotion failure handling on every youngest generation " \ 2058 "collection") \ 2059 \ 2060 develop(uintx, PromotionFailureALotCount, 1000, \ 2061 "Number of promotion failures occurring at PLAB " \ 2062 "refill attempts (ParNew) or promotion attempts " \ 2063 "(other young collectors)") \ 2064 \ 2065 develop(uintx, PromotionFailureALotInterval, 5, \ 2066 "Total collections between promotion failures a lot") \ 2067 \ 2068 experimental(uintx, WorkStealingSleepMillis, 1, \ 2069 "Sleep time when sleep is used for yields") \ 2070 \ 2071 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2072 "Number of yields before a sleep is done during work stealing") \ 2073 \ 2074 experimental(uintx, WorkStealingHardSpins, 4096, \ 2075 "Number of iterations in a spin loop between checks on " \ 2076 "time out of hard spin") \ 2077 \ 2078 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2079 "Ratio of hard spins to calls to yield") \ 2080 \ 2081 develop(uintx, ObjArrayMarkingStride, 512, \ 2082 "Number of object array elements to push onto the marking stack " \ 2083 "before pushing a continuation entry") \ 2084 \ 2085 develop(bool, MetadataAllocationFailALot, false, \ 2086 "Fail metadata allocations at intervals controlled by " \ 2087 "MetadataAllocationFailALotInterval") \ 2088 \ 2089 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2090 "Metadata allocation failure a lot interval") \ 2091 \ 2092 notproduct(bool, ExecuteInternalVMTests, false, \ 2093 "Enable execution of internal VM tests") \ 2094 \ 2095 notproduct(bool, VerboseInternalVMTests, false, \ 2096 "Turn on logging for internal VM tests.") \ 2097 \ 2098 product(bool, ExecutingUnitTests, false, \ 2099 "Whether the JVM is running unit tests or not") \ 2100 \ 2101 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2102 \ 2103 product_pd(bool, ResizeTLAB, \ 2104 "Dynamically resize TLAB size for threads") \ 2105 \ 2106 product(bool, ZeroTLAB, false, \ 2107 "Zero out the newly created TLAB") \ 2108 \ 2109 product(bool, FastTLABRefill, true, \ 2110 "Use fast TLAB refill code") \ 2111 \ 2112 product(bool, TLABStats, true, \ 2113 "Provide more detailed and expensive TLAB statistics.") \ 2114 \ 2115 product_pd(bool, NeverActAsServerClassMachine, \ 2116 "Never act like a server-class machine") \ 2117 \ 2118 product(bool, AlwaysActAsServerClassMachine, false, \ 2119 "Always act like a server-class machine") \ 2120 \ 2121 product_pd(uint64_t, MaxRAM, \ 2122 "Real memory size (in bytes) used to set maximum heap size") \ 2123 range(0, 0XFFFFFFFFFFFFFFFF) \ 2124 \ 2125 product(size_t, ErgoHeapSizeLimit, 0, \ 2126 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2127 "MaxRAM / MaxRAMFraction") \ 2128 range(0, max_uintx) \ 2129 \ 2130 product(uintx, MaxRAMFraction, 4, \ 2131 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2132 "size") \ 2133 range(1, max_uintx) \ 2134 \ 2135 product(uintx, MinRAMFraction, 2, \ 2136 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2137 "size on systems with small physical memory size") \ 2138 range(1, max_uintx) \ 2139 \ 2140 product(uintx, InitialRAMFraction, 64, \ 2141 "Fraction (1/n) of real memory used for initial heap size") \ 2142 range(1, max_uintx) \ 2143 \ 2144 develop(uintx, MaxVirtMemFraction, 2, \ 2145 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2146 "determining maximum heap size") \ 2147 \ 2148 product(bool, UseAutoGCSelectPolicy, false, \ 2149 "Use automatic collection selection policy") \ 2150 \ 2151 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2152 "Automatic GC selection pause threshold in milliseconds") \ 2153 range(0, max_uintx) \ 2154 \ 2155 product(bool, UseAdaptiveSizePolicy, true, \ 2156 "Use adaptive generation sizing policies") \ 2157 \ 2158 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2159 "Use adaptive survivor sizing policies") \ 2160 \ 2161 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2162 "Use adaptive young-old sizing policies at minor collections") \ 2163 \ 2164 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2165 "Use adaptive young-old sizing policies at major collections") \ 2166 \ 2167 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2168 "Include statistics from System.gc() for adaptive size policy") \ 2169 \ 2170 product(bool, UseAdaptiveGCBoundary, false, \ 2171 "Allow young-old boundary to move") \ 2172 \ 2173 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2174 "Resize the virtual spaces of the young or old generations") \ 2175 range(-1, 1) \ 2176 \ 2177 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2178 "Policy for changing generation size for throughput goals") \ 2179 range(0, 1) \ 2180 \ 2181 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2182 "Number of steps where heuristics is used before data is used") \ 2183 range(0, max_uintx) \ 2184 \ 2185 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2186 "Number of collections before the adaptive sizing is started") \ 2187 \ 2188 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2189 "Collection interval for printing information; zero means never") \ 2190 range(0, max_uintx) \ 2191 \ 2192 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2193 "Use adaptive minimum footprint as a goal") \ 2194 \ 2195 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2196 "Weight given to exponential resizing, between 0 and 100") \ 2197 range(0, 100) \ 2198 \ 2199 product(uintx, AdaptiveTimeWeight, 25, \ 2200 "Weight given to time in adaptive policy, between 0 and 100") \ 2201 range(0, 100) \ 2202 \ 2203 product(uintx, PausePadding, 1, \ 2204 "How much buffer to keep for pause time") \ 2205 range(0, max_juint) \ 2206 \ 2207 product(uintx, PromotedPadding, 3, \ 2208 "How much buffer to keep for promotion failure") \ 2209 range(0, max_juint) \ 2210 \ 2211 product(uintx, SurvivorPadding, 3, \ 2212 "How much buffer to keep for survivor overflow") \ 2213 range(0, max_juint) \ 2214 \ 2215 product(uintx, ThresholdTolerance, 10, \ 2216 "Allowed collection cost difference between generations") \ 2217 range(0, 100) \ 2218 \ 2219 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2220 "If collection costs are within margin, reduce both by full " \ 2221 "delta") \ 2222 range(0, 100) \ 2223 \ 2224 product(uintx, YoungGenerationSizeIncrement, 20, \ 2225 "Adaptive size percentage change in young generation") \ 2226 range(0, 100) \ 2227 \ 2228 product(uintx, YoungGenerationSizeSupplement, 80, \ 2229 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2230 range(0, 100) \ 2231 \ 2232 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2233 "Decay factor to YoungedGenerationSizeSupplement") \ 2234 range(1, max_uintx) \ 2235 \ 2236 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2237 "Adaptive size percentage change in tenured generation") \ 2238 range(0, 100) \ 2239 \ 2240 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2241 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2242 range(0, 100) \ 2243 \ 2244 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2245 "Decay factor to TenuredGenerationSizeIncrement") \ 2246 range(1, max_uintx) \ 2247 \ 2248 product(uintx, MaxGCPauseMillis, max_uintx - 1, \ 2249 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2250 "or (G1 Only) the maximum GC time per MMU time slice") \ 2251 range(1, max_uintx - 1) \ 2252 constraint(MaxGCPauseMillisConstraintFunc,AfterErgo) \ 2253 \ 2254 product(uintx, GCPauseIntervalMillis, 0, \ 2255 "Time slice for MMU specification") \ 2256 constraint(GCPauseIntervalMillisConstraintFunc,AfterErgo) \ 2257 \ 2258 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2259 "Adaptive size policy maximum GC minor pause time goal " \ 2260 "in millisecond") \ 2261 range(0, max_uintx) \ 2262 \ 2263 product(uintx, GCTimeRatio, 99, \ 2264 "Adaptive size policy application time to GC time ratio") \ 2265 range(0, max_juint) \ 2266 \ 2267 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2268 "Adaptive size scale down factor for shrinking") \ 2269 range(1, max_uintx) \ 2270 \ 2271 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2272 "Adaptive size decays the major cost for long major intervals") \ 2273 \ 2274 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2275 "Time scale over which major costs decay") \ 2276 range(0, max_uintx) \ 2277 \ 2278 product(uintx, MinSurvivorRatio, 3, \ 2279 "Minimum ratio of young generation/survivor space size") \ 2280 range(3, max_uintx) \ 2281 \ 2282 product(uintx, InitialSurvivorRatio, 8, \ 2283 "Initial ratio of young generation/survivor space size") \ 2284 range(0, max_uintx) \ 2285 \ 2286 product(size_t, BaseFootPrintEstimate, 256*M, \ 2287 "Estimate of footprint other than Java Heap") \ 2288 range(0, max_uintx) \ 2289 \ 2290 product(bool, UseGCOverheadLimit, true, \ 2291 "Use policy to limit of proportion of time spent in GC " \ 2292 "before an OutOfMemory error is thrown") \ 2293 \ 2294 product(uintx, GCTimeLimit, 98, \ 2295 "Limit of the proportion of time spent in GC before " \ 2296 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2297 range(0, 100) \ 2298 \ 2299 product(uintx, GCHeapFreeLimit, 2, \ 2300 "Minimum percentage of free space after a full GC before an " \ 2301 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2302 range(0, 100) \ 2303 \ 2304 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2305 "Number of consecutive collections before gc time limit fires") \ 2306 range(1, max_uintx) \ 2307 \ 2308 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2309 "How far ahead to prefetch destination area (<= 0 means off)") \ 2310 range(-1, max_jint) \ 2311 \ 2312 product(intx, PrefetchScanIntervalInBytes, -1, \ 2313 "How far ahead to prefetch scan area (<= 0 means off)") \ 2314 range(-1, max_jint) \ 2315 \ 2316 product(intx, PrefetchFieldsAhead, -1, \ 2317 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2318 range(-1, max_jint) \ 2319 \ 2320 diagnostic(bool, VerifyDuringStartup, false, \ 2321 "Verify memory system before executing any Java code " \ 2322 "during VM initialization") \ 2323 \ 2324 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2325 "Verify system before exiting") \ 2326 \ 2327 diagnostic(bool, VerifyBeforeGC, false, \ 2328 "Verify memory system before GC") \ 2329 \ 2330 diagnostic(bool, VerifyAfterGC, false, \ 2331 "Verify memory system after GC") \ 2332 \ 2333 diagnostic(bool, VerifyDuringGC, false, \ 2334 "Verify memory system during GC (between phases)") \ 2335 \ 2336 diagnostic(ccstrlist, VerifySubSet, "", \ 2337 "Memory sub-systems to verify when Verify*GC flag(s) " \ 2338 "are enabled. One or more sub-systems can be specified " \ 2339 "in a comma separated string. Sub-systems are: " \ 2340 "threads, heap, symbol_table, string_table, codecache, " \ 2341 "dictionary, classloader_data_graph, metaspace, jni_handles, " \ 2342 "c-heap, codecache_oops") \ 2343 \ 2344 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2345 "Enable parallel memory system verification") \ 2346 \ 2347 diagnostic(bool, DeferInitialCardMark, false, \ 2348 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2349 "may arise from new_pre_store_barrier") \ 2350 \ 2351 product(bool, UseCondCardMark, false, \ 2352 "Check for already marked card before updating card table") \ 2353 \ 2354 diagnostic(bool, VerifyRememberedSets, false, \ 2355 "Verify GC remembered sets") \ 2356 \ 2357 diagnostic(bool, VerifyObjectStartArray, true, \ 2358 "Verify GC object start array if verify before/after") \ 2359 \ 2360 product(bool, DisableExplicitGC, false, \ 2361 "Ignore calls to System.gc()") \ 2362 \ 2363 notproduct(bool, CheckMemoryInitialization, false, \ 2364 "Check memory initialization") \ 2365 \ 2366 diagnostic(bool, BindCMSThreadToCPU, false, \ 2367 "Bind CMS Thread to CPU if possible") \ 2368 \ 2369 diagnostic(uintx, CPUForCMSThread, 0, \ 2370 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2371 range(0, max_juint) \ 2372 \ 2373 product(bool, BindGCTaskThreadsToCPUs, false, \ 2374 "Bind GCTaskThreads to CPUs if possible") \ 2375 \ 2376 product(bool, UseGCTaskAffinity, false, \ 2377 "Use worker affinity when asking for GCTasks") \ 2378 \ 2379 product(uintx, ProcessDistributionStride, 4, \ 2380 "Stride through processors when distributing processes") \ 2381 range(0, max_juint) \ 2382 \ 2383 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2384 "Number of times the coordinator GC thread will sleep while " \ 2385 "yielding before giving up and resuming GC") \ 2386 range(0, max_juint) \ 2387 \ 2388 product(uintx, CMSYieldSleepCount, 0, \ 2389 "Number of times a GC thread (minus the coordinator) " \ 2390 "will sleep while yielding before giving up and resuming GC") \ 2391 range(0, max_juint) \ 2392 \ 2393 product(bool, PrintGC, false, \ 2394 "Print message at garbage collection. " \ 2395 "Deprecated, use -Xlog:gc instead.") \ 2396 \ 2397 product(bool, PrintGCDetails, false, \ 2398 "Print more details at garbage collection. " \ 2399 "Deprecated, use -Xlog:gc* instead.") \ 2400 \ 2401 develop(intx, ConcGCYieldTimeout, 0, \ 2402 "If non-zero, assert that GC threads yield within this " \ 2403 "number of milliseconds") \ 2404 range(0, max_intx) \ 2405 \ 2406 develop(bool, TraceFinalizerRegistration, false, \ 2407 "Trace registration of final references") \ 2408 \ 2409 notproduct(bool, TraceScavenge, false, \ 2410 "Trace scavenge") \ 2411 \ 2412 product(bool, IgnoreEmptyClassPaths, false, \ 2413 "Ignore empty path elements in -classpath") \ 2414 \ 2415 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2416 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2417 "Initial size of the boot class loader data metaspace") \ 2418 range(30*K, max_uintx/BytesPerWord) \ 2419 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 2420 \ 2421 product(bool, TraceYoungGenTime, false, \ 2422 "Trace accumulated time for young collection") \ 2423 \ 2424 product(bool, TraceOldGenTime, false, \ 2425 "Trace accumulated time for old collection") \ 2426 \ 2427 product(bool, PrintHeapAtSIGBREAK, true, \ 2428 "Print heap layout in response to SIGBREAK") \ 2429 \ 2430 manageable(bool, PrintClassHistogram, false, \ 2431 "Print a histogram of class instances") \ 2432 \ 2433 develop(bool, TraceGCTaskManager, false, \ 2434 "Trace actions of the GC task manager") \ 2435 \ 2436 develop(bool, TraceGCTaskQueue, false, \ 2437 "Trace actions of the GC task queues") \ 2438 \ 2439 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2440 "Trace marking phase in ParallelOldGC") \ 2441 \ 2442 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2443 "Trace dense prefix computation for ParallelOldGC") \ 2444 \ 2445 develop(bool, IgnoreLibthreadGPFault, false, \ 2446 "Suppress workaround for libthread GP fault") \ 2447 \ 2448 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2449 "The percentage of the used heap that the instances of a class " \ 2450 "must occupy for the class to generate a trace event") \ 2451 range(0.0, 100.0) \ 2452 \ 2453 /* JVMTI heap profiling */ \ 2454 \ 2455 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2456 "Trace JVMTI object tagging calls") \ 2457 \ 2458 diagnostic(bool, VerifyBeforeIteration, false, \ 2459 "Verify memory system before JVMTI iteration") \ 2460 \ 2461 /* compiler interface */ \ 2462 \ 2463 develop(bool, CIPrintCompilerName, false, \ 2464 "when CIPrint is active, print the name of the active compiler") \ 2465 \ 2466 diagnostic(bool, CIPrintCompileQueue, false, \ 2467 "display the contents of the compile queue whenever a " \ 2468 "compilation is enqueued") \ 2469 \ 2470 develop(bool, CIPrintRequests, false, \ 2471 "display every request for compilation") \ 2472 \ 2473 product(bool, CITime, false, \ 2474 "collect timing information for compilation") \ 2475 \ 2476 develop(bool, CITimeVerbose, false, \ 2477 "be more verbose in compilation timings") \ 2478 \ 2479 develop(bool, CITimeEach, false, \ 2480 "display timing information after each successful compilation") \ 2481 \ 2482 develop(bool, CICountOSR, false, \ 2483 "use a separate counter when assigning ids to osr compilations") \ 2484 \ 2485 develop(bool, CICompileNatives, true, \ 2486 "compile native methods if supported by the compiler") \ 2487 \ 2488 develop_pd(bool, CICompileOSR, \ 2489 "compile on stack replacement methods if supported by the " \ 2490 "compiler") \ 2491 \ 2492 develop(bool, CIPrintMethodCodes, false, \ 2493 "print method bytecodes of the compiled code") \ 2494 \ 2495 develop(bool, CIPrintTypeFlow, false, \ 2496 "print the results of ciTypeFlow analysis") \ 2497 \ 2498 develop(bool, CITraceTypeFlow, false, \ 2499 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2500 \ 2501 develop(intx, OSROnlyBCI, -1, \ 2502 "OSR only at this bci. Negative values mean exclude that bci") \ 2503 \ 2504 /* compiler */ \ 2505 \ 2506 /* notice: the max range value here is max_jint, not max_intx */ \ 2507 /* because of overflow issue */ \ 2508 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2509 "Number of compiler threads to run") \ 2510 range(0, max_jint) \ 2511 constraint(CICompilerCountConstraintFunc, AtParse) \ 2512 \ 2513 product(intx, CompilationPolicyChoice, 0, \ 2514 "which compilation policy (0-3)") \ 2515 range(0, 3) \ 2516 \ 2517 develop(bool, UseStackBanging, true, \ 2518 "use stack banging for stack overflow checks (required for " \ 2519 "proper StackOverflow handling; disable only to measure cost " \ 2520 "of stackbanging)") \ 2521 \ 2522 develop(bool, UseStrictFP, true, \ 2523 "use strict fp if modifier strictfp is set") \ 2524 \ 2525 develop(bool, GenerateSynchronizationCode, true, \ 2526 "generate locking/unlocking code for synchronized methods and " \ 2527 "monitors") \ 2528 \ 2529 develop(bool, GenerateRangeChecks, true, \ 2530 "Generate range checks for array accesses") \ 2531 \ 2532 develop_pd(bool, ImplicitNullChecks, \ 2533 "Generate code for implicit null checks") \ 2534 \ 2535 product_pd(bool, TrapBasedNullChecks, \ 2536 "Generate code for null checks that uses a cmp and trap " \ 2537 "instruction raising SIGTRAP. This is only used if an access to" \ 2538 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2539 "ImplicitNullChecks don't work (PPC64).") \ 2540 \ 2541 product(bool, PrintSafepointStatistics, false, \ 2542 "Print statistics about safepoint synchronization") \ 2543 \ 2544 product(intx, PrintSafepointStatisticsCount, 300, \ 2545 "Total number of safepoint statistics collected " \ 2546 "before printing them out") \ 2547 range(1, max_intx) \ 2548 \ 2549 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2550 "Print safepoint statistics only when safepoint takes " \ 2551 "more than PrintSafepointSatisticsTimeout in millis") \ 2552 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 2553 NOT_LP64(range(-1, max_intx)) \ 2554 \ 2555 product(bool, Inline, true, \ 2556 "Enable inlining") \ 2557 \ 2558 product(bool, ClipInlining, true, \ 2559 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2560 \ 2561 develop(bool, UseCHA, true, \ 2562 "Enable CHA") \ 2563 \ 2564 product(bool, UseTypeProfile, true, \ 2565 "Check interpreter profile for historically monomorphic calls") \ 2566 \ 2567 diagnostic(bool, PrintInlining, false, \ 2568 "Print inlining optimizations") \ 2569 \ 2570 product(bool, UsePopCountInstruction, false, \ 2571 "Use population count instruction") \ 2572 \ 2573 develop(bool, EagerInitialization, false, \ 2574 "Eagerly initialize classes if possible") \ 2575 \ 2576 diagnostic(bool, LogTouchedMethods, false, \ 2577 "Log methods which have been ever touched in runtime") \ 2578 \ 2579 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 2580 "Print all methods that have been ever touched in runtime") \ 2581 \ 2582 develop(bool, TraceMethodReplacement, false, \ 2583 "Print when methods are replaced do to recompilation") \ 2584 \ 2585 develop(bool, PrintMethodFlushing, false, \ 2586 "Print the nmethods being flushed") \ 2587 \ 2588 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2589 "print statistics about method flushing") \ 2590 \ 2591 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2592 "Number of compiled code invocations after which " \ 2593 "the method is considered as hot by the flusher") \ 2594 range(1, max_jint) \ 2595 \ 2596 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2597 "Minimum number of sweeper passes before an nmethod " \ 2598 "can be flushed") \ 2599 range(0, max_intx) \ 2600 \ 2601 product(bool, UseCodeAging, true, \ 2602 "Insert counter to detect warm methods") \ 2603 \ 2604 diagnostic(bool, StressCodeAging, false, \ 2605 "Start with counters compiled in") \ 2606 \ 2607 develop(bool, UseRelocIndex, false, \ 2608 "Use an index to speed random access to relocations") \ 2609 \ 2610 develop(bool, StressCodeBuffers, false, \ 2611 "Exercise code buffer expansion and other rare state changes") \ 2612 \ 2613 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2614 "Generate extra debugging information for non-safepoints in " \ 2615 "nmethods") \ 2616 \ 2617 product(bool, PrintVMOptions, false, \ 2618 "Print flags that appeared on the command line") \ 2619 \ 2620 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2621 "Ignore unrecognized VM options") \ 2622 \ 2623 product(bool, PrintCommandLineFlags, false, \ 2624 "Print flags specified on command line or set by ergonomics") \ 2625 \ 2626 product(bool, PrintFlagsInitial, false, \ 2627 "Print all VM flags before argument processing and exit VM") \ 2628 \ 2629 product(bool, PrintFlagsFinal, false, \ 2630 "Print all VM flags after argument and ergonomic processing") \ 2631 \ 2632 notproduct(bool, PrintFlagsWithComments, false, \ 2633 "Print all VM flags with default values and descriptions and " \ 2634 "exit") \ 2635 \ 2636 product(bool, PrintFlagsRanges, false, \ 2637 "Print VM flags and their ranges and exit VM") \ 2638 \ 2639 diagnostic(bool, SerializeVMOutput, true, \ 2640 "Use a mutex to serialize output to tty and LogFile") \ 2641 \ 2642 diagnostic(bool, DisplayVMOutput, true, \ 2643 "Display all VM output on the tty, independently of LogVMOutput") \ 2644 \ 2645 diagnostic(bool, LogVMOutput, false, \ 2646 "Save VM output to LogFile") \ 2647 \ 2648 diagnostic(ccstr, LogFile, NULL, \ 2649 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2650 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2651 \ 2652 product(ccstr, ErrorFile, NULL, \ 2653 "If an error occurs, save the error data to this file " \ 2654 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2655 \ 2656 product(bool, DisplayVMOutputToStderr, false, \ 2657 "If DisplayVMOutput is true, display all VM output to stderr") \ 2658 \ 2659 product(bool, DisplayVMOutputToStdout, false, \ 2660 "If DisplayVMOutput is true, display all VM output to stdout") \ 2661 \ 2662 product(bool, UseHeavyMonitors, false, \ 2663 "use heavyweight instead of lightweight Java monitors") \ 2664 \ 2665 product(bool, PrintStringTableStatistics, false, \ 2666 "print statistics about the StringTable and SymbolTable") \ 2667 \ 2668 diagnostic(bool, VerifyStringTableAtExit, false, \ 2669 "verify StringTable contents at exit") \ 2670 \ 2671 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2672 "print histogram of the symbol table") \ 2673 \ 2674 notproduct(bool, ExitVMOnVerifyError, false, \ 2675 "standard exit from VM if bytecode verify error " \ 2676 "(only in debug mode)") \ 2677 \ 2678 diagnostic(ccstr, AbortVMOnException, NULL, \ 2679 "Call fatal if this exception is thrown. Example: " \ 2680 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2681 \ 2682 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 2683 "Call fatal if the exception pointed by AbortVMOnException " \ 2684 "has this message") \ 2685 \ 2686 develop(bool, DebugVtables, false, \ 2687 "add debugging code to vtable dispatch") \ 2688 \ 2689 notproduct(bool, PrintVtableStats, false, \ 2690 "print vtables stats at end of run") \ 2691 \ 2692 develop(bool, TraceCreateZombies, false, \ 2693 "trace creation of zombie nmethods") \ 2694 \ 2695 notproduct(bool, IgnoreLockingAssertions, false, \ 2696 "disable locking assertions (for speed)") \ 2697 \ 2698 product(bool, RangeCheckElimination, true, \ 2699 "Eliminate range checks") \ 2700 \ 2701 develop_pd(bool, UncommonNullCast, \ 2702 "track occurrences of null in casts; adjust compiler tactics") \ 2703 \ 2704 develop(bool, TypeProfileCasts, true, \ 2705 "treat casts like calls for purposes of type profiling") \ 2706 \ 2707 develop(bool, DelayCompilationDuringStartup, true, \ 2708 "Delay invoking the compiler until main application class is " \ 2709 "loaded") \ 2710 \ 2711 develop(bool, CompileTheWorld, false, \ 2712 "Compile all methods in all classes in bootstrap class path " \ 2713 "(stress test)") \ 2714 \ 2715 develop(bool, CompileTheWorldPreloadClasses, true, \ 2716 "Preload all classes used by a class before start loading") \ 2717 \ 2718 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2719 "Force a safepoint every n compiles so sweeper can keep up") \ 2720 \ 2721 develop(bool, FillDelaySlots, true, \ 2722 "Fill delay slots (on SPARC only)") \ 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, UseLoopSafepoints, true, \ 2737 "Generate Safepoint nodes in every loop") \ 2738 \ 2739 develop(intx, FastAllocateSizeLimit, 128*K, \ 2740 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2741 "Inline allocations larger than this in doublewords must go slow")\ 2742 \ 2743 product(bool, AggressiveOpts, false, \ 2744 "Enable aggressive optimizations - see arguments.cpp") \ 2745 \ 2746 product_pd(bool, CompactStrings, \ 2747 "Enable Strings to use single byte chars in backing store") \ 2748 \ 2749 product_pd(uintx, TypeProfileLevel, \ 2750 "=XYZ, with Z: Type profiling of arguments at call; " \ 2751 "Y: Type profiling of return value at call; " \ 2752 "X: Type profiling of parameters to methods; " \ 2753 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2754 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 2755 \ 2756 product(intx, TypeProfileArgsLimit, 2, \ 2757 "max number of call arguments to consider for type profiling") \ 2758 range(0, 16) \ 2759 \ 2760 product(intx, TypeProfileParmsLimit, 2, \ 2761 "max number of incoming parameters to consider for type profiling"\ 2762 ", -1 for all") \ 2763 range(-1, 64) \ 2764 \ 2765 /* statistics */ \ 2766 develop(bool, CountCompiledCalls, false, \ 2767 "Count method invocations") \ 2768 \ 2769 notproduct(bool, CountRuntimeCalls, false, \ 2770 "Count VM runtime calls") \ 2771 \ 2772 develop(bool, CountJNICalls, false, \ 2773 "Count jni method invocations") \ 2774 \ 2775 notproduct(bool, CountJVMCalls, false, \ 2776 "Count jvm method invocations") \ 2777 \ 2778 notproduct(bool, CountRemovableExceptions, false, \ 2779 "Count exceptions that could be replaced by branches due to " \ 2780 "inlining") \ 2781 \ 2782 notproduct(bool, ICMissHistogram, false, \ 2783 "Produce histogram of IC misses") \ 2784 \ 2785 /* interpreter */ \ 2786 product_pd(bool, RewriteBytecodes, \ 2787 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2788 \ 2789 product_pd(bool, RewriteFrequentPairs, \ 2790 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2791 \ 2792 diagnostic(bool, PrintInterpreter, false, \ 2793 "Print the generated interpreter code") \ 2794 \ 2795 product(bool, UseInterpreter, true, \ 2796 "Use interpreter for non-compiled methods") \ 2797 \ 2798 develop(bool, UseFastSignatureHandlers, true, \ 2799 "Use fast signature handlers for native calls") \ 2800 \ 2801 product(bool, UseLoopCounter, true, \ 2802 "Increment invocation counter on backward branch") \ 2803 \ 2804 product_pd(bool, UseOnStackReplacement, \ 2805 "Use on stack replacement, calls runtime if invoc. counter " \ 2806 "overflows in loop") \ 2807 \ 2808 notproduct(bool, TraceOnStackReplacement, false, \ 2809 "Trace on stack replacement") \ 2810 \ 2811 product_pd(bool, PreferInterpreterNativeStubs, \ 2812 "Use always interpreter stubs for native methods invoked via " \ 2813 "interpreter") \ 2814 \ 2815 develop(bool, CountBytecodes, false, \ 2816 "Count number of bytecodes executed") \ 2817 \ 2818 develop(bool, PrintBytecodeHistogram, false, \ 2819 "Print histogram of the executed bytecodes") \ 2820 \ 2821 develop(bool, PrintBytecodePairHistogram, false, \ 2822 "Print histogram of the executed bytecode pairs") \ 2823 \ 2824 diagnostic(bool, PrintSignatureHandlers, false, \ 2825 "Print code generated for native method signature handlers") \ 2826 \ 2827 develop(bool, VerifyOops, false, \ 2828 "Do plausibility checks for oops") \ 2829 \ 2830 develop(bool, CheckUnhandledOops, false, \ 2831 "Check for unhandled oops in VM code") \ 2832 \ 2833 develop(bool, VerifyJNIFields, trueInDebug, \ 2834 "Verify jfieldIDs for instance fields") \ 2835 \ 2836 notproduct(bool, VerifyJNIEnvThread, false, \ 2837 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2838 "from JNI") \ 2839 \ 2840 develop(bool, VerifyFPU, false, \ 2841 "Verify FPU state (check for NaN's, etc.)") \ 2842 \ 2843 develop(bool, VerifyThread, false, \ 2844 "Watch the thread register for corruption (SPARC only)") \ 2845 \ 2846 develop(bool, VerifyActivationFrameSize, false, \ 2847 "Verify that activation frame didn't become smaller than its " \ 2848 "minimal size") \ 2849 \ 2850 develop(bool, TraceFrequencyInlining, false, \ 2851 "Trace frequency based inlining") \ 2852 \ 2853 develop_pd(bool, InlineIntrinsics, \ 2854 "Inline intrinsics that can be statically resolved") \ 2855 \ 2856 product_pd(bool, ProfileInterpreter, \ 2857 "Profile at the bytecode level during interpretation") \ 2858 \ 2859 develop(bool, TraceProfileInterpreter, false, \ 2860 "Trace profiling at the bytecode level during interpretation. " \ 2861 "This outputs the profiling information collected to improve " \ 2862 "jit compilation.") \ 2863 \ 2864 develop_pd(bool, ProfileTraps, \ 2865 "Profile deoptimization traps at the bytecode level") \ 2866 \ 2867 product(intx, ProfileMaturityPercentage, 20, \ 2868 "number of method invocations/branches (expressed as % of " \ 2869 "CompileThreshold) before using the method's profile") \ 2870 range(0, 100) \ 2871 \ 2872 diagnostic(bool, PrintMethodData, false, \ 2873 "Print the results of +ProfileInterpreter at end of run") \ 2874 \ 2875 develop(bool, VerifyDataPointer, trueInDebug, \ 2876 "Verify the method data pointer during interpreter profiling") \ 2877 \ 2878 develop(bool, VerifyCompiledCode, false, \ 2879 "Include miscellaneous runtime verifications in nmethod code; " \ 2880 "default off because it disturbs nmethod size heuristics") \ 2881 \ 2882 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2883 "Manually make GC thread crash then dump java stack trace; " \ 2884 "Test only") \ 2885 \ 2886 /* compilation */ \ 2887 product(bool, UseCompiler, true, \ 2888 "Use Just-In-Time compilation") \ 2889 \ 2890 develop(bool, TraceCompilationPolicy, false, \ 2891 "Trace compilation policy") \ 2892 \ 2893 develop(bool, TimeCompilationPolicy, false, \ 2894 "Time the compilation policy") \ 2895 \ 2896 product(bool, UseCounterDecay, true, \ 2897 "Adjust recompilation counters") \ 2898 \ 2899 develop(intx, CounterHalfLifeTime, 30, \ 2900 "Half-life time of invocation counters (in seconds)") \ 2901 \ 2902 develop(intx, CounterDecayMinIntervalLength, 500, \ 2903 "The minimum interval (in milliseconds) between invocation of " \ 2904 "CounterDecay") \ 2905 \ 2906 product(bool, AlwaysCompileLoopMethods, false, \ 2907 "When using recompilation, never interpret methods " \ 2908 "containing loops") \ 2909 \ 2910 product(bool, DontCompileHugeMethods, true, \ 2911 "Do not compile methods > HugeMethodLimit") \ 2912 \ 2913 /* Bytecode escape analysis estimation. */ \ 2914 product(bool, EstimateArgEscape, true, \ 2915 "Analyze bytecodes to estimate escape state of arguments") \ 2916 \ 2917 product(intx, BCEATraceLevel, 0, \ 2918 "How much tracing to do of bytecode escape analysis estimates " \ 2919 "(0-3)") \ 2920 range(0, 3) \ 2921 \ 2922 product(intx, MaxBCEAEstimateLevel, 5, \ 2923 "Maximum number of nested calls that are analyzed by BC EA") \ 2924 range(0, max_jint) \ 2925 \ 2926 product(intx, MaxBCEAEstimateSize, 150, \ 2927 "Maximum bytecode size of a method to be analyzed by BC EA") \ 2928 range(0, max_jint) \ 2929 \ 2930 product(intx, AllocatePrefetchStyle, 1, \ 2931 "0 = no prefetch, " \ 2932 "1 = generate prefetch instructions for each allocation, " \ 2933 "2 = use TLAB watermark to gate allocation prefetch, " \ 2934 "3 = generate one prefetch instruction per cache line") \ 2935 range(0, 3) \ 2936 \ 2937 product(intx, AllocatePrefetchDistance, -1, \ 2938 "Distance to prefetch ahead of allocation pointer. " \ 2939 "-1: use system-specific value (automatically determined") \ 2940 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 2941 \ 2942 product(intx, AllocatePrefetchLines, 3, \ 2943 "Number of lines to prefetch ahead of array allocation pointer") \ 2944 range(1, 64) \ 2945 \ 2946 product(intx, AllocateInstancePrefetchLines, 1, \ 2947 "Number of lines to prefetch ahead of instance allocation " \ 2948 "pointer") \ 2949 range(1, 64) \ 2950 \ 2951 product(intx, AllocatePrefetchStepSize, 16, \ 2952 "Step size in bytes of sequential prefetch instructions") \ 2953 range(1, 512) \ 2954 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 2955 \ 2956 product(intx, AllocatePrefetchInstr, 0, \ 2957 "Select instruction to prefetch ahead of allocation pointer") \ 2958 constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit) \ 2959 \ 2960 /* deoptimization */ \ 2961 develop(bool, TraceDeoptimization, false, \ 2962 "Trace deoptimization") \ 2963 \ 2964 develop(bool, PrintDeoptimizationDetails, false, \ 2965 "Print more information about deoptimization") \ 2966 \ 2967 develop(bool, DebugDeoptimization, false, \ 2968 "Tracing various information while debugging deoptimization") \ 2969 \ 2970 product(intx, SelfDestructTimer, 0, \ 2971 "Will cause VM to terminate after a given time (in minutes) " \ 2972 "(0 means off)") \ 2973 range(0, max_intx) \ 2974 \ 2975 product(intx, MaxJavaStackTraceDepth, 1024, \ 2976 "The maximum number of lines in the stack trace for Java " \ 2977 "exceptions (0 means all)") \ 2978 range(0, max_jint/2) \ 2979 \ 2980 develop(bool, TraceStackWalk, false, \ 2981 "Trace stack walking") \ 2982 \ 2983 /* notice: the max range value here is max_jint, not max_intx */ \ 2984 /* because of overflow issue */ \ 2985 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2986 "Guarantee a safepoint (at least) every so many milliseconds " \ 2987 "(0 means none)")) \ 2988 NOT_EMBEDDED(range(0, max_jint)) \ 2989 \ 2990 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2991 "Guarantee a safepoint (at least) every so many milliseconds " \ 2992 "(0 means none)")) \ 2993 EMBEDDED_ONLY(range(0, max_jint)) \ 2994 \ 2995 product(intx, SafepointTimeoutDelay, 10000, \ 2996 "Delay in milliseconds for option SafepointTimeout") \ 2997 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 2998 NOT_LP64(range(0, max_intx)) \ 2999 \ 3000 product(intx, NmethodSweepActivity, 10, \ 3001 "Removes cold nmethods from code cache if > 0. Higher values " \ 3002 "result in more aggressive sweeping") \ 3003 range(0, 2000) \ 3004 \ 3005 notproduct(bool, LogSweeper, false, \ 3006 "Keep a ring buffer of sweeper activity") \ 3007 \ 3008 notproduct(intx, SweeperLogEntries, 1024, \ 3009 "Number of records in the ring buffer of sweeper activity") \ 3010 \ 3011 notproduct(intx, MemProfilingInterval, 500, \ 3012 "Time between each invocation of the MemProfiler") \ 3013 \ 3014 develop(intx, MallocCatchPtr, -1, \ 3015 "Hit breakpoint when mallocing/freeing this pointer") \ 3016 \ 3017 notproduct(ccstrlist, SuppressErrorAt, "", \ 3018 "List of assertions (file:line) to muzzle") \ 3019 \ 3020 develop(intx, StackPrintLimit, 100, \ 3021 "number of stack frames to print in VM-level stack dump") \ 3022 \ 3023 notproduct(intx, MaxElementPrintSize, 256, \ 3024 "maximum number of elements to print") \ 3025 \ 3026 notproduct(intx, MaxSubklassPrintSize, 4, \ 3027 "maximum number of subklasses to print when printing klass") \ 3028 \ 3029 product(intx, MaxInlineLevel, 9, \ 3030 "maximum number of nested calls that are inlined") \ 3031 range(0, max_jint) \ 3032 \ 3033 product(intx, MaxRecursiveInlineLevel, 1, \ 3034 "maximum number of nested recursive calls that are inlined") \ 3035 range(0, max_jint) \ 3036 \ 3037 develop(intx, MaxForceInlineLevel, 100, \ 3038 "maximum number of nested calls that are forced for inlining " \ 3039 "(using CompileCommand or marked w/ @ForceInline)") \ 3040 range(0, max_jint) \ 3041 \ 3042 product_pd(intx, InlineSmallCode, \ 3043 "Only inline already compiled methods if their code size is " \ 3044 "less than this") \ 3045 range(0, max_jint) \ 3046 \ 3047 product(intx, MaxInlineSize, 35, \ 3048 "The maximum bytecode size of a method to be inlined") \ 3049 range(0, max_jint) \ 3050 \ 3051 product_pd(intx, FreqInlineSize, \ 3052 "The maximum bytecode size of a frequent method to be inlined") \ 3053 range(0, max_jint) \ 3054 \ 3055 product(intx, MaxTrivialSize, 6, \ 3056 "The maximum bytecode size of a trivial method to be inlined") \ 3057 range(0, max_jint) \ 3058 \ 3059 product(intx, MinInliningThreshold, 250, \ 3060 "The minimum invocation count a method needs to have to be " \ 3061 "inlined") \ 3062 range(0, max_jint) \ 3063 \ 3064 develop(intx, MethodHistogramCutoff, 100, \ 3065 "The cutoff value for method invocation histogram (+CountCalls)") \ 3066 \ 3067 diagnostic(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3068 "Number of interpreted methods to show in profile") \ 3069 \ 3070 diagnostic(intx, ProfilerNumberOfCompiledMethods, 25, \ 3071 "Number of compiled methods to show in profile") \ 3072 \ 3073 diagnostic(intx, ProfilerNumberOfStubMethods, 25, \ 3074 "Number of stub methods to show in profile") \ 3075 \ 3076 diagnostic(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3077 "Number of runtime stub nodes to show in profile") \ 3078 \ 3079 product(intx, ProfileIntervalsTicks, 100, \ 3080 "Number of ticks between printing of interval profile " \ 3081 "(+ProfileIntervals)") \ 3082 range(0, max_intx) \ 3083 \ 3084 notproduct(intx, ScavengeALotInterval, 1, \ 3085 "Interval between which scavenge will occur with +ScavengeALot") \ 3086 \ 3087 notproduct(intx, FullGCALotInterval, 1, \ 3088 "Interval between which full gc will occur with +FullGCALot") \ 3089 \ 3090 notproduct(intx, FullGCALotStart, 0, \ 3091 "For which invocation to start FullGCAlot") \ 3092 \ 3093 notproduct(intx, FullGCALotDummies, 32*K, \ 3094 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3095 "to move") \ 3096 \ 3097 develop(intx, DontYieldALotInterval, 10, \ 3098 "Interval between which yields will be dropped (milliseconds)") \ 3099 \ 3100 develop(intx, MinSleepInterval, 1, \ 3101 "Minimum sleep() interval (milliseconds) when " \ 3102 "ConvertSleepToYield is off (used for Solaris)") \ 3103 \ 3104 develop(intx, ProfilerPCTickThreshold, 15, \ 3105 "Number of ticks in a PC buckets to be a hotspot") \ 3106 \ 3107 notproduct(intx, DeoptimizeALotInterval, 5, \ 3108 "Number of exits until DeoptimizeALot kicks in") \ 3109 \ 3110 notproduct(intx, ZombieALotInterval, 5, \ 3111 "Number of exits until ZombieALot kicks in") \ 3112 \ 3113 diagnostic(intx, MallocVerifyInterval, 0, \ 3114 "If non-zero, verify C heap after every N calls to " \ 3115 "malloc/realloc/free") \ 3116 range(0, max_intx) \ 3117 \ 3118 diagnostic(intx, MallocVerifyStart, 0, \ 3119 "If non-zero, start verifying C heap after Nth call to " \ 3120 "malloc/realloc/free") \ 3121 range(0, max_intx) \ 3122 \ 3123 diagnostic(uintx, MallocMaxTestWords, 0, \ 3124 "If non-zero, maximum number of words that malloc/realloc can " \ 3125 "allocate (for testing only)") \ 3126 range(0, max_uintx) \ 3127 \ 3128 product(intx, TypeProfileWidth, 2, \ 3129 "Number of receiver types to record in call/cast profile") \ 3130 range(0, 8) \ 3131 \ 3132 experimental(intx, MethodProfileWidth, 0, \ 3133 "Number of methods to record in call 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 range(-1, max_intx) \ 3141 \ 3142 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3143 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3144 range(-1, max_intx) \ 3145 \ 3146 product(intx, PerMethodTrapLimit, 100, \ 3147 "Limit on traps (of one kind) in a method (includes inlines)") \ 3148 range(0, max_jint) \ 3149 \ 3150 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3151 "Limit on speculative traps (of one kind) in a method " \ 3152 "(includes inlines)") \ 3153 range(0, max_jint) \ 3154 \ 3155 product(intx, PerBytecodeTrapLimit, 4, \ 3156 "Limit on traps (of one kind) at a particular BCI") \ 3157 range(0, max_jint) \ 3158 \ 3159 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3160 "Extra method data trap entries for speculation") \ 3161 \ 3162 develop(intx, InlineFrequencyRatio, 20, \ 3163 "Ratio of call site execution to caller method invocation") \ 3164 range(0, max_jint) \ 3165 \ 3166 develop_pd(intx, InlineFrequencyCount, \ 3167 "Count of call site execution necessary to trigger frequent " \ 3168 "inlining") \ 3169 range(0, max_jint) \ 3170 \ 3171 develop(intx, InlineThrowCount, 50, \ 3172 "Force inlining of interpreted methods that throw this often") \ 3173 range(0, max_jint) \ 3174 \ 3175 develop(intx, InlineThrowMaxSize, 200, \ 3176 "Force inlining of throwing methods smaller than this") \ 3177 range(0, max_jint) \ 3178 \ 3179 develop(intx, ProfilerNodeSize, 1024, \ 3180 "Size in K to allocate for the Profile Nodes of each thread") \ 3181 range(0, 1024) \ 3182 \ 3183 /* gc parameters */ \ 3184 product(size_t, InitialHeapSize, 0, \ 3185 "Initial heap size (in bytes); zero means use ergonomics") \ 3186 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \ 3187 \ 3188 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3189 "Maximum heap size (in bytes)") \ 3190 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \ 3191 \ 3192 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3193 "Initial tenured generation size (in bytes)") \ 3194 range(0, max_uintx) \ 3195 \ 3196 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3197 "Initial new generation size (in bytes)") \ 3198 constraint(NewSizeConstraintFunc,AfterErgo) \ 3199 \ 3200 product(size_t, MaxNewSize, max_uintx, \ 3201 "Maximum new generation size (in bytes), max_uintx means set " \ 3202 "ergonomically") \ 3203 range(0, max_uintx) \ 3204 \ 3205 product_pd(size_t, HeapBaseMinAddress, \ 3206 "OS specific low limit for heap base address") \ 3207 constraint(HeapBaseMinAddressConstraintFunc,AfterErgo) \ 3208 \ 3209 product(size_t, PretenureSizeThreshold, 0, \ 3210 "Maximum size in bytes of objects allocated in DefNew " \ 3211 "generation; zero means no maximum") \ 3212 range(0, max_uintx) \ 3213 \ 3214 product(size_t, MinTLABSize, 2*K, \ 3215 "Minimum allowed TLAB size (in bytes)") \ 3216 range(1, max_uintx/2) \ 3217 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \ 3218 \ 3219 product(size_t, TLABSize, 0, \ 3220 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3221 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \ 3222 \ 3223 product(size_t, YoungPLABSize, 4096, \ 3224 "Size of young gen promotion LAB's (in HeapWords)") \ 3225 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \ 3226 \ 3227 product(size_t, OldPLABSize, 1024, \ 3228 "Size of old gen promotion LAB's (in HeapWords), or Number " \ 3229 "of blocks to attempt to claim when refilling CMS LAB's") \ 3230 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \ 3231 \ 3232 product(uintx, TLABAllocationWeight, 35, \ 3233 "Allocation averaging weight") \ 3234 range(0, 100) \ 3235 \ 3236 /* Limit the lower bound of this flag to 1 as it is used */ \ 3237 /* in a division expression. */ \ 3238 product(uintx, TLABWasteTargetPercent, 1, \ 3239 "Percentage of Eden that can be wasted") \ 3240 range(1, 100) \ 3241 \ 3242 product(uintx, TLABRefillWasteFraction, 64, \ 3243 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3244 range(1, max_juint) \ 3245 \ 3246 product(uintx, TLABWasteIncrement, 4, \ 3247 "Increment allowed waste at slow allocation") \ 3248 range(0, max_jint) \ 3249 constraint(TLABWasteIncrementConstraintFunc,AfterMemoryInit) \ 3250 \ 3251 product(uintx, SurvivorRatio, 8, \ 3252 "Ratio of eden/survivor space size") \ 3253 range(1, max_uintx-2) \ 3254 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \ 3255 \ 3256 product(uintx, NewRatio, 2, \ 3257 "Ratio of old/new generation sizes") \ 3258 range(0, max_uintx-1) \ 3259 \ 3260 product_pd(size_t, NewSizeThreadIncrease, \ 3261 "Additional size added to desired new generation size per " \ 3262 "non-daemon thread (in bytes)") \ 3263 range(0, max_uintx) \ 3264 \ 3265 product_pd(size_t, MetaspaceSize, \ 3266 "Initial threshold (in bytes) at which a garbage collection " \ 3267 "is done to reduce Metaspace usage") \ 3268 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 3269 \ 3270 product(size_t, MaxMetaspaceSize, max_uintx, \ 3271 "Maximum size of Metaspaces (in bytes)") \ 3272 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 3273 \ 3274 product(size_t, CompressedClassSpaceSize, 1*G, \ 3275 "Maximum size of class area in Metaspace when compressed " \ 3276 "class pointers are used") \ 3277 range(1*M, 3*G) \ 3278 \ 3279 manageable(uintx, MinHeapFreeRatio, 40, \ 3280 "The minimum percentage of heap free after GC to avoid expansion."\ 3281 " For most GCs this applies to the old generation. In G1 and" \ 3282 " ParallelGC it applies to the whole heap.") \ 3283 range(0, 100) \ 3284 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 3285 \ 3286 manageable(uintx, MaxHeapFreeRatio, 70, \ 3287 "The maximum percentage of heap free after GC to avoid shrinking."\ 3288 " For most GCs this applies to the old generation. In G1 and" \ 3289 " ParallelGC it applies to the whole heap.") \ 3290 range(0, 100) \ 3291 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 3292 \ 3293 product(bool, ShrinkHeapInSteps, true, \ 3294 "When disabled, informs the GC to shrink the java heap directly" \ 3295 " to the target size at the next full GC rather than requiring" \ 3296 " smaller steps during multiple full GCs.") \ 3297 \ 3298 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3299 "Number of milliseconds per MB of free space in the heap") \ 3300 range(0, max_intx) \ 3301 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 3302 \ 3303 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3304 "The minimum change in heap space due to GC (in bytes)") \ 3305 range(0, max_uintx) \ 3306 \ 3307 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3308 "The minimum expansion of Metaspace (in bytes)") \ 3309 range(0, max_uintx) \ 3310 \ 3311 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3312 "The maximum percentage of Metaspace free after GC to avoid " \ 3313 "shrinking") \ 3314 range(0, 100) \ 3315 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3316 \ 3317 product(uintx, MinMetaspaceFreeRatio, 40, \ 3318 "The minimum percentage of Metaspace free after GC to avoid " \ 3319 "expansion") \ 3320 range(0, 99) \ 3321 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3322 \ 3323 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3324 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3325 range(0, max_uintx) \ 3326 \ 3327 product(uintx, QueuedAllocationWarningCount, 0, \ 3328 "Number of times an allocation that queues behind a GC " \ 3329 "will retry before printing a warning") \ 3330 range(0, max_uintx) \ 3331 \ 3332 diagnostic(uintx, VerifyGCStartAt, 0, \ 3333 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3334 range(0, max_uintx) \ 3335 \ 3336 diagnostic(intx, VerifyGCLevel, 0, \ 3337 "Generation level at which to start +VerifyBefore/AfterGC") \ 3338 range(0, 1) \ 3339 \ 3340 product(uintx, MaxTenuringThreshold, 15, \ 3341 "Maximum value for tenuring threshold") \ 3342 range(0, markOopDesc::max_age + 1) \ 3343 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \ 3344 \ 3345 product(uintx, InitialTenuringThreshold, 7, \ 3346 "Initial value for tenuring threshold") \ 3347 range(0, markOopDesc::max_age + 1) \ 3348 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \ 3349 \ 3350 product(uintx, TargetSurvivorRatio, 50, \ 3351 "Desired percentage of survivor space used after scavenge") \ 3352 range(0, 100) \ 3353 \ 3354 product(uintx, MarkSweepDeadRatio, 5, \ 3355 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3356 "Serial mark sweep treats this as both the minimum and maximum " \ 3357 "value. " \ 3358 "CMS uses this value only if it falls back to mark sweep. " \ 3359 "Par compact uses a variable scale based on the density of the " \ 3360 "generation and treats this as the maximum value when the heap " \ 3361 "is either completely full or completely empty. Par compact " \ 3362 "also has a smaller default value; see arguments.cpp.") \ 3363 range(0, 100) \ 3364 \ 3365 product(uint, MarkSweepAlwaysCompactCount, 4, \ 3366 "How often should we fully compact the heap (ignoring the dead " \ 3367 "space parameters)") \ 3368 range(1, max_juint) \ 3369 \ 3370 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3371 "Delay between expansion and allocation (in milliseconds)") \ 3372 \ 3373 develop(uintx, GCWorkerDelayMillis, 0, \ 3374 "Delay in scheduling GC workers (in milliseconds)") \ 3375 \ 3376 product(intx, DeferThrSuspendLoopCount, 4000, \ 3377 "(Unstable) Number of times to iterate in safepoint loop " \ 3378 "before blocking VM threads ") \ 3379 range(-1, max_jint-1) \ 3380 \ 3381 product(intx, DeferPollingPageLoopCount, -1, \ 3382 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3383 "before changing safepoint polling page to RO ") \ 3384 range(-1, max_jint-1) \ 3385 \ 3386 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3387 range(0, max_intx) \ 3388 \ 3389 product(bool, PSChunkLargeArrays, true, \ 3390 "Process large arrays in chunks") \ 3391 \ 3392 product(uintx, GCDrainStackTargetSize, 64, \ 3393 "Number of entries we will try to leave on the stack " \ 3394 "during parallel gc") \ 3395 range(0, max_juint) \ 3396 \ 3397 /* stack parameters */ \ 3398 product_pd(intx, StackYellowPages, \ 3399 "Number of yellow zone (recoverable overflows) pages of size " \ 3400 "4KB. If pages are bigger yellow zone is aligned up.") \ 3401 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 3402 \ 3403 product_pd(intx, StackRedPages, \ 3404 "Number of red zone (unrecoverable overflows) pages of size " \ 3405 "4KB. If pages are bigger red zone is aligned up.") \ 3406 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 3407 \ 3408 product_pd(intx, StackReservedPages, \ 3409 "Number of reserved zone (reserved to annotated methods) pages" \ 3410 " of size 4KB. If pages are bigger reserved zone is aligned up.") \ 3411 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ 3412 \ 3413 product(bool, RestrictReservedStack, true, \ 3414 "Restrict @ReservedStackAccess to trusted classes") \ 3415 \ 3416 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3417 product_pd(intx, StackShadowPages, \ 3418 "Number of shadow zone (for overflow checking) pages of size " \ 3419 "4KB. If pages are bigger shadow zone is aligned up. " \ 3420 "This should exceed the depth of the VM and native call stack.") \ 3421 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 3422 \ 3423 product_pd(intx, ThreadStackSize, \ 3424 "Thread Stack Size (in Kbytes)") \ 3425 range(0, (max_intx-os::vm_page_size())/(1 * K)) \ 3426 \ 3427 product_pd(intx, VMThreadStackSize, \ 3428 "Non-Java Thread Stack Size (in Kbytes)") \ 3429 range(0, max_intx/(1 * K)) \ 3430 \ 3431 product_pd(intx, CompilerThreadStackSize, \ 3432 "Compiler Thread Stack Size (in Kbytes)") \ 3433 range(0, max_intx/(1 * K)) \ 3434 \ 3435 develop_pd(size_t, JVMInvokeMethodSlack, \ 3436 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3437 \ 3438 /* code cache parameters */ \ 3439 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3440 develop(uintx, CodeCacheSegmentSize, \ 3441 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)), \ 3442 "Code cache segment size (in bytes) - smallest unit of " \ 3443 "allocation") \ 3444 range(1, 1024) \ 3445 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 3446 \ 3447 develop_pd(intx, CodeEntryAlignment, \ 3448 "Code entry alignment for generated code (in bytes)") \ 3449 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 3450 \ 3451 product_pd(intx, OptoLoopAlignment, \ 3452 "Align inner loops to zero relative to this modulus") \ 3453 range(1, 16) \ 3454 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 3455 \ 3456 product_pd(uintx, InitialCodeCacheSize, \ 3457 "Initial code cache size (in bytes)") \ 3458 range(0, max_uintx) \ 3459 \ 3460 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3461 "Minimum code cache size (in bytes) required to start VM.") \ 3462 range(0, max_uintx) \ 3463 \ 3464 product(bool, SegmentedCodeCache, false, \ 3465 "Use a segmented code cache") \ 3466 \ 3467 product_pd(uintx, ReservedCodeCacheSize, \ 3468 "Reserved code cache size (in bytes) - maximum code cache size") \ 3469 range(0, max_uintx) \ 3470 \ 3471 product_pd(uintx, NonProfiledCodeHeapSize, \ 3472 "Size of code heap with non-profiled methods (in bytes)") \ 3473 range(0, max_uintx) \ 3474 \ 3475 product_pd(uintx, ProfiledCodeHeapSize, \ 3476 "Size of code heap with profiled methods (in bytes)") \ 3477 range(0, max_uintx) \ 3478 \ 3479 product_pd(uintx, NonNMethodCodeHeapSize, \ 3480 "Size of code heap with non-nmethods (in bytes)") \ 3481 range(0, max_uintx) \ 3482 \ 3483 product_pd(uintx, CodeCacheExpansionSize, \ 3484 "Code cache expansion size (in bytes)") \ 3485 range(0, max_uintx) \ 3486 \ 3487 develop_pd(uintx, CodeCacheMinBlockLength, \ 3488 "Minimum number of segments in a code cache block") \ 3489 range(1, 100) \ 3490 \ 3491 notproduct(bool, ExitOnFullCodeCache, false, \ 3492 "Exit the VM if we fill the code cache") \ 3493 \ 3494 product(bool, UseCodeCacheFlushing, true, \ 3495 "Remove cold/old nmethods from the code cache") \ 3496 \ 3497 product(uintx, StartAggressiveSweepingAt, 10, \ 3498 "Start aggressive sweeping if X[%] of the code cache is free." \ 3499 "Segmented code cache: X[%] of the non-profiled heap." \ 3500 "Non-segmented code cache: X[%] of the total code cache") \ 3501 range(0, 100) \ 3502 \ 3503 /* interpreter debugging */ \ 3504 develop(intx, BinarySwitchThreshold, 5, \ 3505 "Minimal number of lookupswitch entries for rewriting to binary " \ 3506 "switch") \ 3507 \ 3508 develop(intx, StopInterpreterAt, 0, \ 3509 "Stop interpreter execution at specified bytecode number") \ 3510 \ 3511 develop(intx, TraceBytecodesAt, 0, \ 3512 "Trace bytecodes starting with specified bytecode number") \ 3513 \ 3514 /* compiler interface */ \ 3515 develop(intx, CIStart, 0, \ 3516 "The id of the first compilation to permit") \ 3517 \ 3518 develop(intx, CIStop, max_jint, \ 3519 "The id of the last compilation to permit") \ 3520 \ 3521 develop(intx, CIStartOSR, 0, \ 3522 "The id of the first osr compilation to permit " \ 3523 "(CICountOSR must be on)") \ 3524 \ 3525 develop(intx, CIStopOSR, max_jint, \ 3526 "The id of the last osr compilation to permit " \ 3527 "(CICountOSR must be on)") \ 3528 \ 3529 develop(intx, CIBreakAtOSR, -1, \ 3530 "The id of osr compilation to break at") \ 3531 \ 3532 develop(intx, CIBreakAt, -1, \ 3533 "The id of compilation to break at") \ 3534 \ 3535 product(ccstrlist, CompileOnly, "", \ 3536 "List of methods (pkg/class.name) to restrict compilation to") \ 3537 \ 3538 product(ccstr, CompileCommandFile, NULL, \ 3539 "Read compiler commands from this file [.hotspot_compiler]") \ 3540 \ 3541 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 3542 "Read compiler directives from this file") \ 3543 \ 3544 product(ccstrlist, CompileCommand, "", \ 3545 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3546 \ 3547 develop(bool, ReplayCompiles, false, \ 3548 "Enable replay of compilations from ReplayDataFile") \ 3549 \ 3550 product(ccstr, ReplayDataFile, NULL, \ 3551 "File containing compilation replay information" \ 3552 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3553 \ 3554 product(ccstr, InlineDataFile, NULL, \ 3555 "File containing inlining replay information" \ 3556 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3557 \ 3558 develop(intx, ReplaySuppressInitializers, 2, \ 3559 "Control handling of class initialization during replay: " \ 3560 "0 - don't do anything special; " \ 3561 "1 - treat all class initializers as empty; " \ 3562 "2 - treat class initializers for application classes as empty; " \ 3563 "3 - allow all class initializers to run during bootstrap but " \ 3564 " pretend they are empty after starting replay") \ 3565 range(0, 3) \ 3566 \ 3567 develop(bool, ReplayIgnoreInitErrors, false, \ 3568 "Ignore exceptions thrown during initialization for replay") \ 3569 \ 3570 product(bool, DumpReplayDataOnError, true, \ 3571 "Record replay data for crashing compiler threads") \ 3572 \ 3573 product(bool, CICompilerCountPerCPU, false, \ 3574 "1 compiler thread for log(N CPUs)") \ 3575 \ 3576 develop(intx, CIFireOOMAt, -1, \ 3577 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3578 "(non-negative value throws OOM after this many CI accesses " \ 3579 "in each compile)") \ 3580 notproduct(intx, CICrashAt, -1, \ 3581 "id of compilation to trigger assert in compiler thread for " \ 3582 "the purpose of testing, e.g. generation of replay data") \ 3583 notproduct(bool, CIObjectFactoryVerify, false, \ 3584 "enable potentially expensive verification in ciObjectFactory") \ 3585 \ 3586 /* Priorities */ \ 3587 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3588 \ 3589 product(intx, ThreadPriorityPolicy, 0, \ 3590 "0 : Normal. "\ 3591 " VM chooses priorities that are appropriate for normal "\ 3592 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3593 " to normal native priority. Java priorities below " \ 3594 " NORM_PRIORITY map to lower native priority values. On "\ 3595 " Windows applications are allowed to use higher native "\ 3596 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3597 " not use the highest possible native priority, "\ 3598 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3599 " system threads. On Linux thread priorities are ignored "\ 3600 " because the OS does not support static priority in "\ 3601 " SCHED_OTHER scheduling class which is the only choice for "\ 3602 " non-root, non-realtime applications. "\ 3603 "1 : Aggressive. "\ 3604 " Java thread priorities map over to the entire range of "\ 3605 " native thread priorities. Higher Java thread priorities map "\ 3606 " to higher native thread priorities. This policy should be "\ 3607 " used with care, as sometimes it can cause performance "\ 3608 " degradation in the application and/or the entire system. On "\ 3609 " Linux this policy requires root privilege.") \ 3610 range(0, 1) \ 3611 \ 3612 product(bool, ThreadPriorityVerbose, false, \ 3613 "Print priority changes") \ 3614 \ 3615 product(intx, CompilerThreadPriority, -1, \ 3616 "The native priority at which compiler threads should run " \ 3617 "(-1 means no change)") \ 3618 range(min_jint, max_jint) \ 3619 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 3620 \ 3621 product(intx, VMThreadPriority, -1, \ 3622 "The native priority at which the VM thread should run " \ 3623 "(-1 means no change)") \ 3624 range(-1, 127) \ 3625 \ 3626 product(bool, CompilerThreadHintNoPreempt, true, \ 3627 "(Solaris only) Give compiler threads an extra quanta") \ 3628 \ 3629 product(bool, VMThreadHintNoPreempt, false, \ 3630 "(Solaris only) Give VM thread an extra quanta") \ 3631 \ 3632 product(intx, JavaPriority1_To_OSPriority, -1, \ 3633 "Map Java priorities to OS priorities") \ 3634 range(-1, 127) \ 3635 \ 3636 product(intx, JavaPriority2_To_OSPriority, -1, \ 3637 "Map Java priorities to OS priorities") \ 3638 range(-1, 127) \ 3639 \ 3640 product(intx, JavaPriority3_To_OSPriority, -1, \ 3641 "Map Java priorities to OS priorities") \ 3642 range(-1, 127) \ 3643 \ 3644 product(intx, JavaPriority4_To_OSPriority, -1, \ 3645 "Map Java priorities to OS priorities") \ 3646 range(-1, 127) \ 3647 \ 3648 product(intx, JavaPriority5_To_OSPriority, -1, \ 3649 "Map Java priorities to OS priorities") \ 3650 range(-1, 127) \ 3651 \ 3652 product(intx, JavaPriority6_To_OSPriority, -1, \ 3653 "Map Java priorities to OS priorities") \ 3654 range(-1, 127) \ 3655 \ 3656 product(intx, JavaPriority7_To_OSPriority, -1, \ 3657 "Map Java priorities to OS priorities") \ 3658 range(-1, 127) \ 3659 \ 3660 product(intx, JavaPriority8_To_OSPriority, -1, \ 3661 "Map Java priorities to OS priorities") \ 3662 range(-1, 127) \ 3663 \ 3664 product(intx, JavaPriority9_To_OSPriority, -1, \ 3665 "Map Java priorities to OS priorities") \ 3666 range(-1, 127) \ 3667 \ 3668 product(intx, JavaPriority10_To_OSPriority,-1, \ 3669 "Map Java priorities to OS priorities") \ 3670 range(-1, 127) \ 3671 \ 3672 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3673 "Java thread priority 10 maps to critical scheduling priority") \ 3674 \ 3675 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3676 "Compiler thread(s) run at critical scheduling priority") \ 3677 \ 3678 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3679 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3680 \ 3681 /* compiler debugging */ \ 3682 notproduct(intx, CompileTheWorldStartAt, 1, \ 3683 "First class to consider when using +CompileTheWorld") \ 3684 \ 3685 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3686 "Last class to consider when using +CompileTheWorld") \ 3687 \ 3688 develop(intx, NewCodeParameter, 0, \ 3689 "Testing Only: Create a dedicated integer parameter before " \ 3690 "putback") \ 3691 \ 3692 /* new oopmap storage allocation */ \ 3693 develop(intx, MinOopMapAllocation, 8, \ 3694 "Minimum number of OopMap entries in an OopMapSet") \ 3695 \ 3696 /* Background Compilation */ \ 3697 develop(intx, LongCompileThreshold, 50, \ 3698 "Used with +TraceLongCompiles") \ 3699 \ 3700 /* recompilation */ \ 3701 product_pd(intx, CompileThreshold, \ 3702 "number of interpreted method invocations before (re-)compiling") \ 3703 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 3704 \ 3705 product(double, CompileThresholdScaling, 1.0, \ 3706 "Factor to control when first compilation happens " \ 3707 "(both with and without tiered compilation): " \ 3708 "values greater than 1.0 delay counter overflow, " \ 3709 "values between 0 and 1.0 rush counter overflow, " \ 3710 "value of 1.0 leaves compilation thresholds unchanged " \ 3711 "value of 0.0 is equivalent to -Xint. " \ 3712 "" \ 3713 "Flag can be set as per-method option. " \ 3714 "If a value is specified for a method, compilation thresholds " \ 3715 "for that method are scaled by both the value of the global flag "\ 3716 "and the value of the per-method flag.") \ 3717 range(0.0, DBL_MAX) \ 3718 \ 3719 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3720 "Interpreter (tier 0) invocation notification frequency") \ 3721 range(0, 30) \ 3722 \ 3723 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3724 "C1 without MDO (tier 2) invocation notification frequency") \ 3725 range(0, 30) \ 3726 \ 3727 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3728 "C1 with MDO profiling (tier 3) invocation notification " \ 3729 "frequency") \ 3730 range(0, 30) \ 3731 \ 3732 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3733 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3734 range(0, 30) \ 3735 \ 3736 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3737 "Interpreter (tier 0) invocation notification frequency") \ 3738 range(0, 30) \ 3739 \ 3740 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3741 "C1 without MDO (tier 2) invocation notification frequency") \ 3742 range(0, 30) \ 3743 \ 3744 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3745 "C1 with MDO profiling (tier 3) invocation notification " \ 3746 "frequency") \ 3747 range(0, 30) \ 3748 \ 3749 product(intx, Tier2CompileThreshold, 0, \ 3750 "threshold at which tier 2 compilation is invoked") \ 3751 range(0, max_jint) \ 3752 \ 3753 product(intx, Tier2BackEdgeThreshold, 0, \ 3754 "Back edge threshold at which tier 2 compilation is invoked") \ 3755 range(0, max_jint) \ 3756 \ 3757 product(intx, Tier3InvocationThreshold, 200, \ 3758 "Compile if number of method invocations crosses this " \ 3759 "threshold") \ 3760 range(0, max_jint) \ 3761 \ 3762 product(intx, Tier3MinInvocationThreshold, 100, \ 3763 "Minimum invocation to compile at tier 3") \ 3764 range(0, max_jint) \ 3765 \ 3766 product(intx, Tier3CompileThreshold, 2000, \ 3767 "Threshold at which tier 3 compilation is invoked (invocation " \ 3768 "minimum must be satisfied)") \ 3769 range(0, max_jint) \ 3770 \ 3771 product(intx, Tier3BackEdgeThreshold, 60000, \ 3772 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3773 range(0, max_jint) \ 3774 \ 3775 product(intx, Tier4InvocationThreshold, 5000, \ 3776 "Compile if number of method invocations crosses this " \ 3777 "threshold") \ 3778 range(0, max_jint) \ 3779 \ 3780 product(intx, Tier4MinInvocationThreshold, 600, \ 3781 "Minimum invocation to compile at tier 4") \ 3782 range(0, max_jint) \ 3783 \ 3784 product(intx, Tier4CompileThreshold, 15000, \ 3785 "Threshold at which tier 4 compilation is invoked (invocation " \ 3786 "minimum must be satisfied") \ 3787 range(0, max_jint) \ 3788 \ 3789 product(intx, Tier4BackEdgeThreshold, 40000, \ 3790 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3791 range(0, max_jint) \ 3792 \ 3793 product(intx, Tier3DelayOn, 5, \ 3794 "If C2 queue size grows over this amount per compiler thread " \ 3795 "stop compiling at tier 3 and start compiling at tier 2") \ 3796 range(0, max_jint) \ 3797 \ 3798 product(intx, Tier3DelayOff, 2, \ 3799 "If C2 queue size is less than this amount per compiler thread " \ 3800 "allow methods compiled at tier 2 transition to tier 3") \ 3801 range(0, max_jint) \ 3802 \ 3803 product(intx, Tier3LoadFeedback, 5, \ 3804 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3805 "reaches this amount per compiler thread") \ 3806 range(0, max_jint) \ 3807 \ 3808 product(intx, Tier4LoadFeedback, 3, \ 3809 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3810 "reaches this amount per compiler thread") \ 3811 range(0, max_jint) \ 3812 \ 3813 product(intx, TieredCompileTaskTimeout, 50, \ 3814 "Kill compile task if method was not used within " \ 3815 "given timeout in milliseconds") \ 3816 range(0, max_intx) \ 3817 \ 3818 product(intx, TieredStopAtLevel, 4, \ 3819 "Stop at given compilation level") \ 3820 range(0, 4) \ 3821 \ 3822 product(intx, Tier0ProfilingStartPercentage, 200, \ 3823 "Start profiling in interpreter if the counters exceed tier 3 " \ 3824 "thresholds by the specified percentage") \ 3825 range(0, max_jint) \ 3826 \ 3827 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3828 "Increase the compile threshold for C1 compilation if the code " \ 3829 "cache is filled by the specified percentage") \ 3830 range(0, 99) \ 3831 \ 3832 product(intx, TieredRateUpdateMinTime, 1, \ 3833 "Minimum rate sampling interval (in milliseconds)") \ 3834 range(0, max_intx) \ 3835 \ 3836 product(intx, TieredRateUpdateMaxTime, 25, \ 3837 "Maximum rate sampling interval (in milliseconds)") \ 3838 range(0, max_intx) \ 3839 \ 3840 product_pd(bool, TieredCompilation, \ 3841 "Enable tiered compilation") \ 3842 \ 3843 product(bool, PrintTieredEvents, false, \ 3844 "Print tiered events notifications") \ 3845 \ 3846 product_pd(intx, OnStackReplacePercentage, \ 3847 "NON_TIERED number of method invocations/branches (expressed as " \ 3848 "% of CompileThreshold) before (re-)compiling OSR code") \ 3849 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 3850 \ 3851 product(intx, InterpreterProfilePercentage, 33, \ 3852 "NON_TIERED number of method invocations/branches (expressed as " \ 3853 "% of CompileThreshold) before profiling in the interpreter") \ 3854 range(0, 100) \ 3855 \ 3856 develop(intx, MaxRecompilationSearchLength, 10, \ 3857 "The maximum number of frames to inspect when searching for " \ 3858 "recompilee") \ 3859 \ 3860 develop(intx, MaxInterpretedSearchLength, 3, \ 3861 "The maximum number of interpreted frames to skip when searching "\ 3862 "for recompilee") \ 3863 \ 3864 develop(intx, DesiredMethodLimit, 8000, \ 3865 "The desired maximum method size (in bytecodes) after inlining") \ 3866 \ 3867 develop(intx, HugeMethodLimit, 8000, \ 3868 "Don't compile methods larger than this if " \ 3869 "+DontCompileHugeMethods") \ 3870 \ 3871 /* New JDK 1.4 reflection implementation */ \ 3872 \ 3873 develop(intx, FastSuperclassLimit, 8, \ 3874 "Depth of hardwired instanceof accelerator array") \ 3875 \ 3876 /* Properties for Java libraries */ \ 3877 \ 3878 product(uint64_t, MaxDirectMemorySize, 0, \ 3879 "Maximum total size of NIO direct-buffer allocations") \ 3880 range(0, max_jlong) \ 3881 \ 3882 /* Flags used for temporary code during development */ \ 3883 \ 3884 diagnostic(bool, UseNewCode, false, \ 3885 "Testing Only: Use the new version while testing") \ 3886 \ 3887 diagnostic(bool, UseNewCode2, false, \ 3888 "Testing Only: Use the new version while testing") \ 3889 \ 3890 diagnostic(bool, UseNewCode3, false, \ 3891 "Testing Only: Use the new version while testing") \ 3892 \ 3893 /* flags for performance data collection */ \ 3894 \ 3895 product(bool, UsePerfData, falseInEmbedded, \ 3896 "Flag to disable jvmstat instrumentation for performance testing "\ 3897 "and problem isolation purposes") \ 3898 \ 3899 product(bool, PerfDataSaveToFile, false, \ 3900 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3901 \ 3902 product(ccstr, PerfDataSaveFile, NULL, \ 3903 "Save PerfData memory to the specified absolute pathname. " \ 3904 "The string %p in the file name (if present) " \ 3905 "will be replaced by pid") \ 3906 \ 3907 product(intx, PerfDataSamplingInterval, 50, \ 3908 "Data sampling interval (in milliseconds)") \ 3909 range(PeriodicTask::min_interval, max_jint) \ 3910 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 3911 \ 3912 develop(bool, PerfTraceDataCreation, false, \ 3913 "Trace creation of Performance Data Entries") \ 3914 \ 3915 develop(bool, PerfTraceMemOps, false, \ 3916 "Trace PerfMemory create/attach/detach calls") \ 3917 \ 3918 product(bool, PerfDisableSharedMem, false, \ 3919 "Store performance data in standard memory") \ 3920 \ 3921 product(intx, PerfDataMemorySize, 32*K, \ 3922 "Size of performance data memory region. Will be rounded " \ 3923 "up to a multiple of the native os page size.") \ 3924 range(128, 32*64*K) \ 3925 \ 3926 product(intx, PerfMaxStringConstLength, 1024, \ 3927 "Maximum PerfStringConstant string length before truncation") \ 3928 range(32, 32*K) \ 3929 \ 3930 product(bool, PerfAllowAtExitRegistration, false, \ 3931 "Allow registration of atexit() methods") \ 3932 \ 3933 product(bool, PerfBypassFileSystemCheck, false, \ 3934 "Bypass Win32 file system criteria checks (Windows Only)") \ 3935 \ 3936 product(intx, UnguardOnExecutionViolation, 0, \ 3937 "Unguard page and retry on no-execute fault (Win32 only) " \ 3938 "0=off, 1=conservative, 2=aggressive") \ 3939 range(0, 2) \ 3940 \ 3941 /* Serviceability Support */ \ 3942 \ 3943 product(bool, ManagementServer, false, \ 3944 "Create JMX Management Server") \ 3945 \ 3946 product(bool, DisableAttachMechanism, false, \ 3947 "Disable mechanism that allows tools to attach to this VM") \ 3948 \ 3949 product(bool, StartAttachListener, false, \ 3950 "Always start Attach Listener at VM startup") \ 3951 \ 3952 manageable(bool, PrintConcurrentLocks, false, \ 3953 "Print java.util.concurrent locks in thread dump") \ 3954 \ 3955 product(bool, TransmitErrorReport, false, \ 3956 "Enable error report transmission on erroneous termination") \ 3957 \ 3958 product(ccstr, ErrorReportServer, NULL, \ 3959 "Override built-in error report server address") \ 3960 \ 3961 /* Shared spaces */ \ 3962 \ 3963 product(bool, UseSharedSpaces, true, \ 3964 "Use shared spaces for metadata") \ 3965 \ 3966 product(bool, VerifySharedSpaces, false, \ 3967 "Verify shared spaces (false for default archive, true for " \ 3968 "archive specified by -XX:SharedArchiveFile)") \ 3969 \ 3970 product(bool, RequireSharedSpaces, false, \ 3971 "Require shared spaces for metadata") \ 3972 \ 3973 product(bool, DumpSharedSpaces, false, \ 3974 "Special mode: JVM reads a class list, loads classes, builds " \ 3975 "shared spaces, and dumps the shared spaces to a file to be " \ 3976 "used in future JVM runs") \ 3977 \ 3978 product(bool, PrintSharedSpaces, false, \ 3979 "Print usage of shared spaces") \ 3980 \ 3981 product(bool, PrintSharedArchiveAndExit, false, \ 3982 "Print shared archive file contents") \ 3983 \ 3984 product(bool, PrintSharedDictionary, false, \ 3985 "If PrintSharedArchiveAndExit is true, also print the shared " \ 3986 "dictionary") \ 3987 \ 3988 product(size_t, SharedReadWriteSize, DEFAULT_SHARED_READ_WRITE_SIZE, \ 3989 "Size of read-write space for metadata (in bytes)") \ 3990 range(MIN_SHARED_READ_WRITE_SIZE, MAX_SHARED_READ_WRITE_SIZE) \ 3991 constraint(SharedReadWriteSizeConstraintFunc,AfterErgo) \ 3992 \ 3993 product(size_t, SharedReadOnlySize, DEFAULT_SHARED_READ_ONLY_SIZE, \ 3994 "Size of read-only space for metadata (in bytes)") \ 3995 range(MIN_SHARED_READ_ONLY_SIZE, MAX_SHARED_READ_ONLY_SIZE) \ 3996 constraint(SharedReadOnlySizeConstraintFunc,AfterErgo) \ 3997 \ 3998 product(size_t, SharedMiscDataSize, DEFAULT_SHARED_MISC_DATA_SIZE, \ 3999 "Size of the shared miscellaneous data area (in bytes)") \ 4000 range(MIN_SHARED_MISC_DATA_SIZE, MAX_SHARED_MISC_DATA_SIZE) \ 4001 constraint(SharedMiscDataSizeConstraintFunc,AfterErgo) \ 4002 \ 4003 product(size_t, SharedMiscCodeSize, DEFAULT_SHARED_MISC_CODE_SIZE, \ 4004 "Size of the shared miscellaneous code area (in bytes)") \ 4005 range(MIN_SHARED_MISC_CODE_SIZE, MAX_SHARED_MISC_CODE_SIZE) \ 4006 constraint(SharedMiscCodeSizeConstraintFunc,AfterErgo) \ 4007 \ 4008 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 4009 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 4010 "Address to allocate shared memory region for class data") \ 4011 range(0, SIZE_MAX) \ 4012 \ 4013 product(uintx, SharedSymbolTableBucketSize, 4, \ 4014 "Average number of symbols per bucket in shared table") \ 4015 range(2, 246) \ 4016 \ 4017 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 4018 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 4019 "classes. Just exclude them from the shared dictionary.") \ 4020 \ 4021 diagnostic(bool, PrintMethodHandleStubs, false, \ 4022 "Print generated stub code for method handles") \ 4023 \ 4024 develop(bool, TraceMethodHandles, false, \ 4025 "trace internal method handle operations") \ 4026 \ 4027 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4028 "perform extra checks when constructing method handles") \ 4029 \ 4030 diagnostic(bool, ShowHiddenFrames, false, \ 4031 "show method handle implementation frames (usually hidden)") \ 4032 \ 4033 experimental(bool, TrustFinalNonStaticFields, false, \ 4034 "trust final non-static declarations for constant folding") \ 4035 \ 4036 diagnostic(bool, FoldStableValues, true, \ 4037 "Optimize loads from stable fields (marked w/ @Stable)") \ 4038 \ 4039 develop(bool, TraceInvokeDynamic, false, \ 4040 "trace internal invoke dynamic operations") \ 4041 \ 4042 diagnostic(bool, PauseAtStartup, false, \ 4043 "Causes the VM to pause at startup time and wait for the pause " \ 4044 "file to be removed (default: ./vm.paused.<pid>)") \ 4045 \ 4046 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4047 "The file to create and for whose removal to await when pausing " \ 4048 "at startup. (default: ./vm.paused.<pid>)") \ 4049 \ 4050 diagnostic(bool, PauseAtExit, false, \ 4051 "Pause and wait for keypress on exit if a debugger is attached") \ 4052 \ 4053 product(bool, ExtendedDTraceProbes, false, \ 4054 "Enable performance-impacting dtrace probes") \ 4055 \ 4056 product(bool, DTraceMethodProbes, false, \ 4057 "Enable dtrace probes for method-entry and method-exit") \ 4058 \ 4059 product(bool, DTraceAllocProbes, false, \ 4060 "Enable dtrace probes for object allocation") \ 4061 \ 4062 product(bool, DTraceMonitorProbes, false, \ 4063 "Enable dtrace probes for monitor events") \ 4064 \ 4065 product(bool, RelaxAccessControlCheck, false, \ 4066 "Relax the access control checks in the verifier") \ 4067 \ 4068 product(uintx, StringTableSize, defaultStringTableSize, \ 4069 "Number of buckets in the interned String table") \ 4070 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4071 \ 4072 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4073 "Number of buckets in the JVM internal Symbol table") \ 4074 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4075 \ 4076 product(bool, UseStringDeduplication, false, \ 4077 "Use string deduplication") \ 4078 \ 4079 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4080 "A string must reach this age (or be promoted to an old region) " \ 4081 "to be considered for deduplication") \ 4082 range(1, markOopDesc::max_age) \ 4083 \ 4084 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4085 "Force table resize every time the table is scanned") \ 4086 \ 4087 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4088 "Force table rehash every time the table is scanned") \ 4089 \ 4090 diagnostic(bool, WhiteBoxAPI, false, \ 4091 "Enable internal testing APIs") \ 4092 \ 4093 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4094 "Default survivor space alignment in bytes") \ 4095 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 4096 \ 4097 product(bool , AllowNonVirtualCalls, false, \ 4098 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4099 \ 4100 product(ccstr, DumpLoadedClassList, NULL, \ 4101 "Dump the names all loaded classes, that could be stored into " \ 4102 "the CDS archive, in the specified file") \ 4103 \ 4104 product(ccstr, SharedClassListFile, NULL, \ 4105 "Override the default CDS class list") \ 4106 \ 4107 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4108 "Override the default location of the CDS archive file") \ 4109 \ 4110 product(ccstr, ExtraSharedClassListFile, NULL, \ 4111 "Extra classlist for building the CDS archive file") \ 4112 \ 4113 experimental(size_t, ArrayAllocatorMallocLimit, \ 4114 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4115 "Allocation less than this value will be allocated " \ 4116 "using malloc. Larger allocations will use mmap.") \ 4117 \ 4118 experimental(bool, AlwaysAtomicAccesses, false, \ 4119 "Accesses to all variables should always be atomic") \ 4120 \ 4121 product(bool, EnableTracing, false, \ 4122 "Enable event-based tracing") \ 4123 \ 4124 product(bool, UseLockedTracing, false, \ 4125 "Use locked-tracing when doing event-based tracing") \ 4126 \ 4127 diagnostic(bool, UseUnalignedAccesses, false, \ 4128 "Use unaligned memory accesses in Unsafe") \ 4129 \ 4130 product_pd(bool, PreserveFramePointer, \ 4131 "Use the FP register for holding the frame pointer " \ 4132 "and not as a general purpose register.") \ 4133 \ 4134 diagnostic(bool, CheckIntrinsics, true, \ 4135 "When a class C is loaded, check that " \ 4136 "(1) all intrinsics defined by the VM for class C are present "\ 4137 "in the loaded class file and are marked with the " \ 4138 "@HotSpotIntrinsicCandidate annotation, that " \ 4139 "(2) there is an intrinsic registered for all loaded methods " \ 4140 "that are annotated with the @HotSpotIntrinsicCandidate " \ 4141 "annotation, and that " \ 4142 "(3) no orphan methods exist for class C (i.e., methods for " \ 4143 "which the VM declares an intrinsic but that are not declared "\ 4144 "in the loaded class C. " \ 4145 "Check (3) is available only in debug builds.") \ 4146 \ 4147 develop_pd(intx, InitArrayShortSize, \ 4148 "Threshold small size (in bytes) for clearing arrays. " \ 4149 "Anything this size or smaller may get converted to discrete " \ 4150 "scalar stores.") \ 4151 range(0, max_intx) \ 4152 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ 4153 \ 4154 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 4155 "Disable backwards compatibility for compile commands.") \ 4156 \ 4157 diagnostic(bool, CompilerDirectivesPrint, false, \ 4158 "Print compiler directives on installation.") \ 4159 diagnostic(int, CompilerDirectivesLimit, 50, \ 4160 "Limit on number of compiler directives.") 4161 4162 4163/* 4164 * Macros for factoring of globals 4165 */ 4166 4167// Interface macros 4168#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4169#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4170#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4171#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4172#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4173#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4174#ifdef PRODUCT 4175#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 4176#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 4177#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 4178#else 4179#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4180#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4181#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4182#endif // PRODUCT 4183// Special LP64 flags, product only needed for now. 4184#ifdef _LP64 4185#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4186#else 4187#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4188#endif // _LP64 4189 4190// Implementation macros 4191#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4192#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4193#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4194#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4195#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4196#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4197#ifdef PRODUCT 4198#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 4199#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 4200#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 4201#else 4202#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4203#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4204#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4205#endif // PRODUCT 4206#ifdef _LP64 4207#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4208#else 4209#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4210#endif // _LP64 4211 4212// Only materialize src code for range checking when required, ignore otherwise 4213#define IGNORE_RANGE(a, b) 4214// Only materialize src code for contraint checking when required, ignore otherwise 4215#define IGNORE_CONSTRAINT(func,type) 4216 4217#define IGNORE_WRITEABLE(type) 4218 4219RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4220 DECLARE_PD_DEVELOPER_FLAG, \ 4221 DECLARE_PRODUCT_FLAG, \ 4222 DECLARE_PD_PRODUCT_FLAG, \ 4223 DECLARE_DIAGNOSTIC_FLAG, \ 4224 DECLARE_EXPERIMENTAL_FLAG, \ 4225 DECLARE_NOTPRODUCT_FLAG, \ 4226 DECLARE_MANAGEABLE_FLAG, \ 4227 DECLARE_PRODUCT_RW_FLAG, \ 4228 DECLARE_LP64_PRODUCT_FLAG, \ 4229 IGNORE_RANGE, \ 4230 IGNORE_CONSTRAINT, \ 4231 IGNORE_WRITEABLE) 4232 4233RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4234 DECLARE_PD_DEVELOPER_FLAG, \ 4235 DECLARE_PRODUCT_FLAG, \ 4236 DECLARE_PD_PRODUCT_FLAG, \ 4237 DECLARE_DIAGNOSTIC_FLAG, \ 4238 DECLARE_NOTPRODUCT_FLAG, \ 4239 IGNORE_RANGE, \ 4240 IGNORE_CONSTRAINT, \ 4241 IGNORE_WRITEABLE) 4242 4243ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4244 DECLARE_PRODUCT_FLAG, \ 4245 DECLARE_DIAGNOSTIC_FLAG, \ 4246 DECLARE_EXPERIMENTAL_FLAG, \ 4247 DECLARE_NOTPRODUCT_FLAG, \ 4248 IGNORE_RANGE, \ 4249 IGNORE_CONSTRAINT, \ 4250 IGNORE_WRITEABLE) 4251 4252// Extensions 4253 4254#include "runtime/globals_ext.hpp" 4255 4256#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4257