globals.hpp revision 10276:eda0d9992163
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 227struct Flag { 228 enum Flags { 229 // value origin 230 DEFAULT = 0, 231 COMMAND_LINE = 1, 232 ENVIRON_VAR = 2, 233 CONFIG_FILE = 3, 234 MANAGEMENT = 4, 235 ERGONOMIC = 5, 236 ATTACH_ON_DEMAND = 6, 237 INTERNAL = 7, 238 239 LAST_VALUE_ORIGIN = INTERNAL, 240 VALUE_ORIGIN_BITS = 4, 241 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS), 242 243 // flag kind 244 KIND_PRODUCT = 1 << 4, 245 KIND_MANAGEABLE = 1 << 5, 246 KIND_DIAGNOSTIC = 1 << 6, 247 KIND_EXPERIMENTAL = 1 << 7, 248 KIND_NOT_PRODUCT = 1 << 8, 249 KIND_DEVELOP = 1 << 9, 250 KIND_PLATFORM_DEPENDENT = 1 << 10, 251 KIND_READ_WRITE = 1 << 11, 252 KIND_C1 = 1 << 12, 253 KIND_C2 = 1 << 13, 254 KIND_ARCH = 1 << 14, 255 KIND_SHARK = 1 << 15, 256 KIND_LP64_PRODUCT = 1 << 16, 257 KIND_COMMERCIAL = 1 << 17, 258 KIND_JVMCI = 1 << 18, 259 260 KIND_MASK = ~VALUE_ORIGIN_MASK 261 }; 262 263 enum Error { 264 // no error 265 SUCCESS = 0, 266 // flag name is missing 267 MISSING_NAME, 268 // flag value is missing 269 MISSING_VALUE, 270 // error parsing the textual form of the value 271 WRONG_FORMAT, 272 // flag is not writeable 273 NON_WRITABLE, 274 // flag value is outside of its bounds 275 OUT_OF_BOUNDS, 276 // flag value violates its constraint 277 VIOLATES_CONSTRAINT, 278 // there is no flag with the given name 279 INVALID_FLAG, 280 // other, unspecified error related to setting the flag 281 ERR_OTHER 282 }; 283 284 enum MsgType { 285 NONE = 0, 286 DIAGNOSTIC_FLAG_BUT_LOCKED, 287 EXPERIMENTAL_FLAG_BUT_LOCKED, 288 DEVELOPER_FLAG_BUT_PRODUCT_BUILD, 289 NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD 290 }; 291 292 const char* _type; 293 const char* _name; 294 void* _addr; 295 NOT_PRODUCT(const char* _doc;) 296 Flags _flags; 297 298 // points to all Flags static array 299 static Flag* flags; 300 301 // number of flags 302 static size_t numFlags; 303 304 static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); }; 305 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false); 306 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 307 308 void check_writable(); 309 310 bool is_bool() const; 311 bool get_bool() const; 312 void set_bool(bool value); 313 314 bool is_int() const; 315 int get_int() const; 316 void set_int(int value); 317 318 bool is_uint() const; 319 uint get_uint() const; 320 void set_uint(uint value); 321 322 bool is_intx() const; 323 intx get_intx() const; 324 void set_intx(intx value); 325 326 bool is_uintx() const; 327 uintx get_uintx() const; 328 void set_uintx(uintx value); 329 330 bool is_uint64_t() const; 331 uint64_t get_uint64_t() const; 332 void set_uint64_t(uint64_t value); 333 334 bool is_size_t() const; 335 size_t get_size_t() const; 336 void set_size_t(size_t value); 337 338 bool is_double() const; 339 double get_double() const; 340 void set_double(double value); 341 342 bool is_ccstr() const; 343 bool ccstr_accumulates() const; 344 ccstr get_ccstr() const; 345 void set_ccstr(ccstr value); 346 347 Flags get_origin(); 348 void set_origin(Flags origin); 349 350 bool is_default(); 351 bool is_ergonomic(); 352 bool is_command_line(); 353 354 bool is_product() const; 355 bool is_manageable() const; 356 bool is_diagnostic() const; 357 bool is_experimental() const; 358 bool is_notproduct() const; 359 bool is_develop() const; 360 bool is_read_write() const; 361 bool is_commercial() const; 362 363 bool is_constant_in_binary() const; 364 365 bool is_unlocker() const; 366 bool is_unlocked() const; 367 bool is_writeable() const; 368 bool is_external() const; 369 370 bool is_unlocker_ext() const; 371 bool is_unlocked_ext() const; 372 bool is_writeable_ext() const; 373 bool is_external_ext() const; 374 375 void unlock_diagnostic(); 376 377 Flag::MsgType get_locked_message(char*, int) const; 378 void get_locked_message_ext(char*, int) const; 379 380 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 381 void print_on(outputStream* st, bool withComments = false, bool printRanges = false); 382 void print_kind(outputStream* st); 383 void print_as_flag(outputStream* st); 384 385 static const char* flag_error_str(Flag::Error error); 386}; 387 388// debug flags control various aspects of the VM and are global accessible 389 390// use FlagSetting to temporarily change some debug flag 391// e.g. FlagSetting fs(DebugThisAndThat, true); 392// restored to previous value upon leaving scope 393class FlagSetting { 394 bool val; 395 bool* flag; 396 public: 397 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 398 ~FlagSetting() { *flag = val; } 399}; 400 401 402class CounterSetting { 403 intx* counter; 404 public: 405 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 406 ~CounterSetting() { (*counter)--; } 407}; 408 409class IntFlagSetting { 410 int val; 411 int* flag; 412 public: 413 IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; } 414 ~IntFlagSetting() { *flag = val; } 415}; 416 417class UIntFlagSetting { 418 uint val; 419 uint* flag; 420 public: 421 UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; } 422 ~UIntFlagSetting() { *flag = val; } 423}; 424 425class UIntXFlagSetting { 426 uintx val; 427 uintx* flag; 428 public: 429 UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 430 ~UIntXFlagSetting() { *flag = val; } 431}; 432 433class DoubleFlagSetting { 434 double val; 435 double* flag; 436 public: 437 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 438 ~DoubleFlagSetting() { *flag = val; } 439}; 440 441class SizeTFlagSetting { 442 size_t val; 443 size_t* flag; 444 public: 445 SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; } 446 ~SizeTFlagSetting() { *flag = val; } 447}; 448 449 450class CommandLineFlags { 451public: 452 static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false); 453 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); } 454 static Flag::Error boolAtPut(Flag* flag, bool* value, Flag::Flags origin); 455 static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin); 456 static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 457 458 static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false); 459 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); } 460 static Flag::Error intAtPut(Flag* flag, int* value, Flag::Flags origin); 461 static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin); 462 static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); } 463 464 static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false); 465 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); } 466 static Flag::Error uintAtPut(Flag* flag, uint* value, Flag::Flags origin); 467 static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin); 468 static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); } 469 470 static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false); 471 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); } 472 static Flag::Error intxAtPut(Flag* flag, intx* value, Flag::Flags origin); 473 static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin); 474 static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 475 476 static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false); 477 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); } 478 static Flag::Error uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin); 479 static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin); 480 static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 481 482 static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false); 483 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); } 484 static Flag::Error size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin); 485 static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin); 486 static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); } 487 488 static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false); 489 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); } 490 static Flag::Error uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin); 491 static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin); 492 static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 493 494 static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false); 495 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); } 496 static Flag::Error doubleAtPut(Flag* flag, double* value, Flag::Flags origin); 497 static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin); 498 static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 499 500 static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false); 501 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); } 502 // Contract: Flag will make private copy of the incoming value. 503 // Outgoing value is always malloc-ed, and caller MUST call free. 504 static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin); 505 static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 506 507 // Returns false if name is not a command line flag. 508 static bool wasSetOnCmdline(const char* name, bool* value); 509 static void printSetFlags(outputStream* out); 510 511 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 512 static void printFlags(outputStream* out, bool withComments, bool printRanges = false); 513 514 static void verify() PRODUCT_RETURN; 515}; 516 517// use this for flags that are true by default in the debug version but 518// false in the optimized version, and vice versa 519#ifdef ASSERT 520#define trueInDebug true 521#define falseInDebug false 522#else 523#define trueInDebug false 524#define falseInDebug true 525#endif 526 527// use this for flags that are true per default in the product build 528// but false in development builds, and vice versa 529#ifdef PRODUCT 530#define trueInProduct true 531#define falseInProduct false 532#else 533#define trueInProduct false 534#define falseInProduct true 535#endif 536 537#ifdef JAVASE_EMBEDDED 538#define falseInEmbedded false 539#else 540#define falseInEmbedded true 541#endif 542 543// develop flags are settable / visible only during development and are constant in the PRODUCT version 544// product flags are always settable / visible 545// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 546 547// A flag must be declared with one of the following types: 548// bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 549// The type "ccstr" is an alias for "const char*" and is used 550// only in this file, because the macrology requires single-token type names. 551 552// Note: Diagnostic options not meant for VM tuning or for product modes. 553// They are to be used for VM quality assurance or field diagnosis 554// of VM bugs. They are hidden so that users will not be encouraged to 555// try them as if they were VM ordinary execution options. However, they 556// are available in the product version of the VM. Under instruction 557// from support engineers, VM customers can turn them on to collect 558// diagnostic information about VM problems. To use a VM diagnostic 559// option, you must first specify +UnlockDiagnosticVMOptions. 560// (This master switch also affects the behavior of -Xprintflags.) 561// 562// experimental flags are in support of features that are not 563// part of the officially supported product, but are available 564// for experimenting with. They could, for example, be performance 565// features that may not have undergone full or rigorous QA, but which may 566// help performance in some cases and released for experimentation 567// by the community of users and developers. This flag also allows one to 568// be able to build a fully supported product that nonetheless also 569// ships with some unsupported, lightly tested, experimental features. 570// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 571// UnlockExperimentalVMOptions flag, which allows the control and 572// modification of the experimental flags. 573// 574// Nota bene: neither diagnostic nor experimental options should be used casually, 575// and they are not supported on production loads, except under explicit 576// direction from support engineers. 577// 578// manageable flags are writeable external product flags. 579// They are dynamically writeable through the JDK management interface 580// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 581// These flags are external exported interface (see CCC). The list of 582// manageable flags can be queried programmatically through the management 583// interface. 584// 585// A flag can be made as "manageable" only if 586// - the flag is defined in a CCC as an external exported interface. 587// - the VM implementation supports dynamic setting of the flag. 588// This implies that the VM must *always* query the flag variable 589// and not reuse state related to the flag state at any given time. 590// - you want the flag to be queried programmatically by the customers. 591// 592// product_rw flags are writeable internal product flags. 593// They are like "manageable" flags but for internal/private use. 594// The list of product_rw flags are internal/private flags which 595// may be changed/removed in a future release. It can be set 596// through the management interface to get/set value 597// when the name of flag is supplied. 598// 599// A flag can be made as "product_rw" only if 600// - the VM implementation supports dynamic setting of the flag. 601// This implies that the VM must *always* query the flag variable 602// and not reuse state related to the flag state at any given time. 603// 604// Note that when there is a need to support develop flags to be writeable, 605// it can be done in the same way as product_rw. 606// 607// range is a macro that will expand to min and max arguments for range 608// checking code if provided - see commandLineFlagRangeList.hpp 609// 610// constraint is a macro that will expand to custom function call 611// for constraint checking if provided - see commandLineFlagConstraintList.hpp 612// 613 614#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product, range, constraint) \ 615 \ 616 lp64_product(bool, UseCompressedOops, false, \ 617 "Use 32-bit object references in 64-bit VM. " \ 618 "lp64_product means flag is always constant in 32 bit VM") \ 619 \ 620 lp64_product(bool, UseCompressedClassPointers, false, \ 621 "Use 32-bit class pointers in 64-bit VM. " \ 622 "lp64_product means flag is always constant in 32 bit VM") \ 623 \ 624 notproduct(bool, CheckCompressedOops, true, \ 625 "Generate checks in encoding/decoding code in debug VM") \ 626 \ 627 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 628 "Heap allocation steps through preferred address regions to find" \ 629 " where it can allocate the heap. Number of steps to take per " \ 630 "region.") \ 631 range(1, max_uintx) \ 632 \ 633 diagnostic(bool, PrintCompressedOopsMode, false, \ 634 "Print compressed oops base address and encoding mode") \ 635 \ 636 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 637 "Default object alignment in bytes, 8 is minimum") \ 638 range(8, 256) \ 639 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 640 \ 641 product(bool, AssumeMP, false, \ 642 "Instruct the VM to assume multiple processors are available") \ 643 \ 644 /* UseMembar is theoretically a temp flag used for memory barrier */ \ 645 /* removal testing. It was supposed to be removed before FCS but has */ \ 646 /* been re-added (see 6401008) */ \ 647 product_pd(bool, UseMembar, \ 648 "(Unstable) Issues membars on thread state transitions") \ 649 \ 650 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 651 "Clean the chunk pool asynchronously") \ 652 \ 653 experimental(bool, AlwaysSafeConstructors, false, \ 654 "Force safe construction, as if all fields are final.") \ 655 \ 656 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 657 "Enable normal processing of flags relating to field diagnostics")\ 658 \ 659 experimental(bool, UnlockExperimentalVMOptions, false, \ 660 "Enable normal processing of flags relating to experimental " \ 661 "features") \ 662 \ 663 product(bool, JavaMonitorsInStackTrace, true, \ 664 "Print information about Java monitor locks when the stacks are" \ 665 "dumped") \ 666 \ 667 product_pd(bool, UseLargePages, \ 668 "Use large page memory") \ 669 \ 670 product_pd(bool, UseLargePagesIndividualAllocation, \ 671 "Allocate large pages individually for better affinity") \ 672 \ 673 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 674 "Fail large pages individual allocation") \ 675 \ 676 product(bool, UseLargePagesInMetaspace, false, \ 677 "Use large page memory in metaspace. " \ 678 "Only used if UseLargePages is enabled.") \ 679 \ 680 develop(bool, TracePageSizes, false, \ 681 "Trace page size selection and usage") \ 682 \ 683 product(bool, UseNUMA, false, \ 684 "Use NUMA if available") \ 685 \ 686 product(bool, UseNUMAInterleaving, false, \ 687 "Interleave memory across NUMA nodes if available") \ 688 \ 689 product(size_t, NUMAInterleaveGranularity, 2*M, \ 690 "Granularity to use for NUMA interleaving on Windows OS") \ 691 range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \ 692 \ 693 product(bool, ForceNUMA, false, \ 694 "Force NUMA optimizations on single-node/UMA systems") \ 695 \ 696 product(uintx, NUMAChunkResizeWeight, 20, \ 697 "Percentage (0-100) used to weight the current sample when " \ 698 "computing exponentially decaying average for " \ 699 "AdaptiveNUMAChunkSizing") \ 700 range(0, 100) \ 701 \ 702 product(size_t, NUMASpaceResizeRate, 1*G, \ 703 "Do not reallocate more than this amount per collection") \ 704 range(0, max_uintx) \ 705 \ 706 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 707 "Enable adaptive chunk sizing for NUMA") \ 708 \ 709 product(bool, NUMAStats, false, \ 710 "Print NUMA stats in detailed heap information") \ 711 \ 712 product(uintx, NUMAPageScanRate, 256, \ 713 "Maximum number of pages to include in the page scan procedure") \ 714 range(0, max_uintx) \ 715 \ 716 product_pd(bool, NeedsDeoptSuspend, \ 717 "True for register window machines (sparc/ia64)") \ 718 \ 719 product(intx, UseSSE, 99, \ 720 "Highest supported SSE instructions set on x86/x64") \ 721 range(0, 99) \ 722 \ 723 product(bool, UseAES, false, \ 724 "Control whether AES instructions can be used on x86/x64") \ 725 \ 726 product(bool, UseSHA, false, \ 727 "Control whether SHA instructions can be used " \ 728 "on SPARC and on ARM") \ 729 \ 730 product(bool, UseGHASHIntrinsics, false, \ 731 "Use intrinsics for GHASH versions of crypto") \ 732 \ 733 product(size_t, LargePageSizeInBytes, 0, \ 734 "Large page size (0 to let VM choose the page size)") \ 735 range(0, max_uintx) \ 736 \ 737 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 738 "Use large pages if maximum heap is at least this big") \ 739 range(0, max_uintx) \ 740 \ 741 product(bool, ForceTimeHighResolution, false, \ 742 "Using high time resolution (for Win32 only)") \ 743 \ 744 develop(bool, TracePcPatching, false, \ 745 "Trace usage of frame::patch_pc") \ 746 \ 747 develop(bool, TraceJumps, false, \ 748 "Trace assembly jumps in thread ring buffer") \ 749 \ 750 develop(bool, TraceRelocator, false, \ 751 "Trace the bytecode relocator") \ 752 \ 753 develop(bool, TraceLongCompiles, false, \ 754 "Print out every time compilation is longer than " \ 755 "a given threshold") \ 756 \ 757 develop(bool, SafepointALot, false, \ 758 "Generate a lot of safepoints. This works with " \ 759 "GuaranteedSafepointInterval") \ 760 \ 761 product_pd(bool, BackgroundCompilation, \ 762 "A thread requesting compilation is not blocked during " \ 763 "compilation") \ 764 \ 765 product(bool, PrintVMQWaitTime, false, \ 766 "Print out the waiting time in VM operation queue") \ 767 \ 768 develop(bool, TraceOopMapGeneration, false, \ 769 "Show OopMapGeneration") \ 770 \ 771 product(bool, MethodFlushing, true, \ 772 "Reclamation of zombie and not-entrant methods") \ 773 \ 774 develop(bool, VerifyStack, false, \ 775 "Verify stack of each thread when it is entering a runtime call") \ 776 \ 777 diagnostic(bool, ForceUnreachable, false, \ 778 "Make all non code cache addresses to be unreachable by " \ 779 "forcing use of 64bit literal fixups") \ 780 \ 781 notproduct(bool, StressDerivedPointers, false, \ 782 "Force scavenge when a derived pointer is detected on stack " \ 783 "after rtm call") \ 784 \ 785 develop(bool, TraceDerivedPointers, false, \ 786 "Trace traversal of derived pointers on stack") \ 787 \ 788 notproduct(bool, TraceCodeBlobStacks, false, \ 789 "Trace stack-walk of codeblobs") \ 790 \ 791 product(bool, PrintJNIResolving, false, \ 792 "Used to implement -v:jni") \ 793 \ 794 notproduct(bool, PrintRewrites, false, \ 795 "Print methods that are being rewritten") \ 796 \ 797 product(bool, UseInlineCaches, true, \ 798 "Use Inline Caches for virtual calls ") \ 799 \ 800 develop(bool, InlineArrayCopy, true, \ 801 "Inline arraycopy native that is known to be part of " \ 802 "base library DLL") \ 803 \ 804 develop(bool, InlineObjectHash, true, \ 805 "Inline Object::hashCode() native that is known to be part " \ 806 "of base library DLL") \ 807 \ 808 develop(bool, InlineNatives, true, \ 809 "Inline natives that are known to be part of base library DLL") \ 810 \ 811 develop(bool, InlineMathNatives, true, \ 812 "Inline SinD, CosD, etc.") \ 813 \ 814 develop(bool, InlineClassNatives, true, \ 815 "Inline Class.isInstance, etc") \ 816 \ 817 develop(bool, InlineThreadNatives, true, \ 818 "Inline Thread.currentThread, etc") \ 819 \ 820 develop(bool, InlineUnsafeOps, true, \ 821 "Inline memory ops (native methods) from Unsafe") \ 822 \ 823 product(bool, CriticalJNINatives, true, \ 824 "Check for critical JNI entry points") \ 825 \ 826 notproduct(bool, StressCriticalJNINatives, false, \ 827 "Exercise register saving code in critical natives") \ 828 \ 829 product(bool, UseAESIntrinsics, false, \ 830 "Use intrinsics for AES versions of crypto") \ 831 \ 832 product(bool, UseAESCTRIntrinsics, false, \ 833 "Use intrinsics for the paralleled version of AES/CTR crypto") \ 834 \ 835 product(bool, UseSHA1Intrinsics, false, \ 836 "Use intrinsics for SHA-1 crypto hash function. " \ 837 "Requires that UseSHA is enabled.") \ 838 \ 839 product(bool, UseSHA256Intrinsics, false, \ 840 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 841 "Requires that UseSHA is enabled.") \ 842 \ 843 product(bool, UseSHA512Intrinsics, false, \ 844 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 845 "Requires that UseSHA is enabled.") \ 846 \ 847 product(bool, UseCRC32Intrinsics, false, \ 848 "use intrinsics for java.util.zip.CRC32") \ 849 \ 850 product(bool, UseCRC32CIntrinsics, false, \ 851 "use intrinsics for java.util.zip.CRC32C") \ 852 \ 853 product(bool, UseAdler32Intrinsics, false, \ 854 "use intrinsics for java.util.zip.Adler32") \ 855 \ 856 product(bool, UseVectorizedMismatchIntrinsic, false, \ 857 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ 858 \ 859 diagnostic(ccstrlist, DisableIntrinsic, "", \ 860 "do not expand intrinsics whose (internal) names appear here") \ 861 \ 862 develop(bool, TraceCallFixup, false, \ 863 "Trace all call fixups") \ 864 \ 865 develop(bool, DeoptimizeALot, false, \ 866 "Deoptimize at every exit from the runtime system") \ 867 \ 868 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 869 "A comma separated list of bcis to deoptimize at") \ 870 \ 871 product(bool, DeoptimizeRandom, false, \ 872 "Deoptimize random frames on random exit from the runtime system")\ 873 \ 874 notproduct(bool, ZombieALot, false, \ 875 "Create zombies (non-entrant) at exit from the runtime system") \ 876 \ 877 product(bool, UnlinkSymbolsALot, false, \ 878 "Unlink unreferenced symbols from the symbol table at safepoints")\ 879 \ 880 notproduct(bool, WalkStackALot, false, \ 881 "Trace stack (no print) at every exit from the runtime system") \ 882 \ 883 product(bool, Debugging, false, \ 884 "Set when executing debug methods in debug.cpp " \ 885 "(to prevent triggering assertions)") \ 886 \ 887 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 888 "Enable strict checks that safepoints cannot happen for threads " \ 889 "that use NoSafepointVerifier") \ 890 \ 891 notproduct(bool, VerifyLastFrame, false, \ 892 "Verify oops on last frame on entry to VM") \ 893 \ 894 develop(bool, TraceHandleAllocation, false, \ 895 "Print out warnings when suspiciously many handles are allocated")\ 896 \ 897 product(bool, FailOverToOldVerifier, true, \ 898 "Fail over to old verifier when split verifier fails") \ 899 \ 900 develop(bool, ShowSafepointMsgs, false, \ 901 "Show message about safepoint synchronization") \ 902 \ 903 product(bool, SafepointTimeout, false, \ 904 "Time out and warn or fail after SafepointTimeoutDelay " \ 905 "milliseconds if failed to reach safepoint") \ 906 \ 907 develop(bool, DieOnSafepointTimeout, false, \ 908 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 909 \ 910 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 911 /* typically, at most a few retries are needed */ \ 912 product(intx, SuspendRetryCount, 50, \ 913 "Maximum retry count for an external suspend request") \ 914 range(0, max_intx) \ 915 \ 916 product(intx, SuspendRetryDelay, 5, \ 917 "Milliseconds to delay per retry (* current_retry_count)") \ 918 range(0, max_intx) \ 919 \ 920 product(bool, AssertOnSuspendWaitFailure, false, \ 921 "Assert/Guarantee on external suspend wait failure") \ 922 \ 923 product(bool, TraceSuspendWaitFailures, false, \ 924 "Trace external suspend wait failures") \ 925 \ 926 product(bool, MaxFDLimit, true, \ 927 "Bump the number of file descriptors to maximum in Solaris") \ 928 \ 929 diagnostic(bool, LogEvents, true, \ 930 "Enable the various ring buffer event logs") \ 931 \ 932 diagnostic(uintx, LogEventsBufferEntries, 10, \ 933 "Number of ring buffer event logs") \ 934 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 935 \ 936 product(bool, BytecodeVerificationRemote, true, \ 937 "Enable the Java bytecode verifier for remote classes") \ 938 \ 939 product(bool, BytecodeVerificationLocal, false, \ 940 "Enable the Java bytecode verifier for local classes") \ 941 \ 942 develop(bool, ForceFloatExceptions, trueInDebug, \ 943 "Force exceptions on FP stack under/overflow") \ 944 \ 945 develop(bool, VerifyStackAtCalls, false, \ 946 "Verify that the stack pointer is unchanged after calls") \ 947 \ 948 develop(bool, TraceJavaAssertions, false, \ 949 "Trace java language assertions") \ 950 \ 951 notproduct(bool, CheckAssertionStatusDirectives, false, \ 952 "Temporary - see javaClasses.cpp") \ 953 \ 954 notproduct(bool, PrintMallocFree, false, \ 955 "Trace calls to C heap malloc/free allocation") \ 956 \ 957 product(bool, PrintOopAddress, false, \ 958 "Always print the location of the oop") \ 959 \ 960 notproduct(bool, VerifyCodeCache, false, \ 961 "Verify code cache on memory allocation/deallocation") \ 962 \ 963 develop(bool, UseMallocOnly, false, \ 964 "Use only malloc/free for allocation (no resource area/arena)") \ 965 \ 966 develop(bool, PrintMalloc, false, \ 967 "Print all malloc/free calls") \ 968 \ 969 develop(bool, PrintMallocStatistics, false, \ 970 "Print malloc/free statistics") \ 971 \ 972 develop(bool, ZapResourceArea, trueInDebug, \ 973 "Zap freed resource/arena space with 0xABABABAB") \ 974 \ 975 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 976 "Zap freed VM handle space with 0xBCBCBCBC") \ 977 \ 978 develop(bool, ZapJNIHandleArea, trueInDebug, \ 979 "Zap freed JNI handle space with 0xFEFEFEFE") \ 980 \ 981 notproduct(bool, ZapStackSegments, trueInDebug, \ 982 "Zap allocated/freed stack segments with 0xFADFADED") \ 983 \ 984 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 985 "Zap unused heap space with 0xBAADBABE") \ 986 \ 987 develop(bool, CheckZapUnusedHeapArea, false, \ 988 "Check zapping of unused heap space") \ 989 \ 990 develop(bool, ZapFillerObjects, trueInDebug, \ 991 "Zap filler objects with 0xDEAFBABE") \ 992 \ 993 develop(bool, PrintVMMessages, true, \ 994 "Print VM messages on console") \ 995 \ 996 diagnostic(bool, VerboseVerification, false, \ 997 "Display detailed verification details") \ 998 \ 999 notproduct(uintx, ErrorHandlerTest, 0, \ 1000 "If > 0, provokes an error after VM initialization; the value " \ 1001 "determines which error to provoke. See test_error_handler() " \ 1002 "in debug.cpp.") \ 1003 \ 1004 notproduct(uintx, TestCrashInErrorHandler, 0, \ 1005 "If > 0, provokes an error inside VM error handler (a secondary " \ 1006 "crash). see test_error_handler() in debug.cpp.") \ 1007 \ 1008 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 1009 "If true, tests SafeFetch inside error handler.") \ 1010 \ 1011 develop(bool, Verbose, false, \ 1012 "Print additional debugging information from other modes") \ 1013 \ 1014 develop(bool, PrintMiscellaneous, false, \ 1015 "Print uncategorized debugging information (requires +Verbose)") \ 1016 \ 1017 develop(bool, WizardMode, false, \ 1018 "Print much more debugging information") \ 1019 \ 1020 product(bool, ShowMessageBoxOnError, false, \ 1021 "Keep process alive on VM fatal error") \ 1022 \ 1023 product(bool, CreateCoredumpOnCrash, true, \ 1024 "Create core/mini dump on VM fatal error") \ 1025 \ 1026 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 1027 "Timeout, in seconds, to limit the time spent on writing an " \ 1028 "error log in case of a crash.") \ 1029 range(0, (uint64_t)max_jlong/1000) \ 1030 \ 1031 product_pd(bool, UseOSErrorReporting, \ 1032 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 1033 \ 1034 product(bool, SuppressFatalErrorMessage, false, \ 1035 "Report NO fatal error message (avoid deadlock)") \ 1036 \ 1037 product(ccstrlist, OnError, "", \ 1038 "Run user-defined commands on fatal error; see VMError.cpp " \ 1039 "for examples") \ 1040 \ 1041 product(ccstrlist, OnOutOfMemoryError, "", \ 1042 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 1043 \ 1044 manageable(bool, HeapDumpBeforeFullGC, false, \ 1045 "Dump heap to file before any major stop-the-world GC") \ 1046 \ 1047 manageable(bool, HeapDumpAfterFullGC, false, \ 1048 "Dump heap to file after any major stop-the-world GC") \ 1049 \ 1050 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 1051 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 1052 \ 1053 manageable(ccstr, HeapDumpPath, NULL, \ 1054 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 1055 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 1056 "in the working directory)") \ 1057 \ 1058 develop(size_t, SegmentedHeapDumpThreshold, 2*G, \ 1059 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 1060 "when the heap usage is larger than this") \ 1061 \ 1062 develop(size_t, HeapDumpSegmentSize, 1*G, \ 1063 "Approximate segment size when generating a segmented heap dump") \ 1064 \ 1065 develop(bool, BreakAtWarning, false, \ 1066 "Execute breakpoint upon encountering VM warning") \ 1067 \ 1068 develop(bool, UseFakeTimers, false, \ 1069 "Tell whether the VM should use system time or a fake timer") \ 1070 \ 1071 product(ccstr, NativeMemoryTracking, "off", \ 1072 "Native memory tracking options") \ 1073 \ 1074 diagnostic(bool, PrintNMTStatistics, false, \ 1075 "Print native memory tracking summary data if it is on") \ 1076 \ 1077 diagnostic(bool, LogCompilation, false, \ 1078 "Log compilation activity in detail to LogFile") \ 1079 \ 1080 product(bool, PrintCompilation, false, \ 1081 "Print compilations") \ 1082 \ 1083 diagnostic(bool, TraceNMethodInstalls, false, \ 1084 "Trace nmethod installation") \ 1085 \ 1086 diagnostic(intx, ScavengeRootsInCode, 2, \ 1087 "0: do not allow scavengable oops in the code cache; " \ 1088 "1: allow scavenging from the code cache; " \ 1089 "2: emit as many constants as the compiler can see") \ 1090 range(0, 2) \ 1091 \ 1092 product(bool, AlwaysRestoreFPU, false, \ 1093 "Restore the FPU control word after every JNI call (expensive)") \ 1094 \ 1095 diagnostic(bool, PrintCompilation2, false, \ 1096 "Print additional statistics per compilation") \ 1097 \ 1098 diagnostic(bool, PrintAdapterHandlers, false, \ 1099 "Print code generated for i2c/c2i adapters") \ 1100 \ 1101 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 1102 "Verify that i2c/c2i adapters are called properly") \ 1103 \ 1104 develop(bool, VerifyAdapterSharing, false, \ 1105 "Verify that the code for shared adapters is the equivalent") \ 1106 \ 1107 diagnostic(bool, PrintAssembly, false, \ 1108 "Print assembly code (using external disassembler.so)") \ 1109 \ 1110 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 1111 "Print options string passed to disassembler.so") \ 1112 \ 1113 notproduct(bool, PrintNMethodStatistics, false, \ 1114 "Print a summary statistic for the generated nmethods") \ 1115 \ 1116 diagnostic(bool, PrintNMethods, false, \ 1117 "Print assembly code for nmethods when generated") \ 1118 \ 1119 diagnostic(bool, PrintNativeNMethods, false, \ 1120 "Print assembly code for native nmethods when generated") \ 1121 \ 1122 develop(bool, PrintDebugInfo, false, \ 1123 "Print debug information for all nmethods when generated") \ 1124 \ 1125 develop(bool, PrintRelocations, false, \ 1126 "Print relocation information for all nmethods when generated") \ 1127 \ 1128 develop(bool, PrintDependencies, false, \ 1129 "Print dependency information for all nmethods when generated") \ 1130 \ 1131 develop(bool, PrintExceptionHandlers, false, \ 1132 "Print exception handler tables for all nmethods when generated") \ 1133 \ 1134 develop(bool, StressCompiledExceptionHandlers, false, \ 1135 "Exercise compiled exception handlers") \ 1136 \ 1137 develop(bool, InterceptOSException, false, \ 1138 "Start debugger when an implicit OS (e.g. NULL) " \ 1139 "exception happens") \ 1140 \ 1141 product(bool, PrintCodeCache, false, \ 1142 "Print the code cache memory usage when exiting") \ 1143 \ 1144 develop(bool, PrintCodeCache2, false, \ 1145 "Print detailed usage information on the code cache when exiting")\ 1146 \ 1147 product(bool, PrintCodeCacheOnCompilation, false, \ 1148 "Print the code cache memory usage each time a method is " \ 1149 "compiled") \ 1150 \ 1151 diagnostic(bool, PrintStubCode, false, \ 1152 "Print generated stub code") \ 1153 \ 1154 product(bool, StackTraceInThrowable, true, \ 1155 "Collect backtrace in throwable when exception happens") \ 1156 \ 1157 product(bool, OmitStackTraceInFastThrow, true, \ 1158 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1159 \ 1160 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1161 "Print bytecode statistics when dumping profiler output") \ 1162 \ 1163 product(bool, ProfilerRecordPC, false, \ 1164 "Collect ticks for each 16 byte interval of compiled code") \ 1165 \ 1166 product(bool, ProfileVM, false, \ 1167 "Profile ticks that fall within VM (either in the VM Thread " \ 1168 "or VM code called through stubs)") \ 1169 \ 1170 product(bool, ProfileIntervals, false, \ 1171 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1172 \ 1173 notproduct(bool, ProfilerCheckIntervals, false, \ 1174 "Collect and print information on spacing of profiler ticks") \ 1175 \ 1176 product(bool, PrintWarnings, true, \ 1177 "Print JVM warnings to output stream") \ 1178 \ 1179 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1180 "Print warnings for stalled SpinLocks") \ 1181 \ 1182 product(bool, RegisterFinalizersAtInit, true, \ 1183 "Register finalizable objects at end of Object.<init> or " \ 1184 "after allocation") \ 1185 \ 1186 develop(bool, RegisterReferences, true, \ 1187 "Tell whether the VM should register soft/weak/final/phantom " \ 1188 "references") \ 1189 \ 1190 develop(bool, IgnoreRewrites, false, \ 1191 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1192 "This is unsafe!") \ 1193 \ 1194 develop(bool, PrintCodeCacheExtension, false, \ 1195 "Print extension of code cache") \ 1196 \ 1197 develop(bool, UsePrivilegedStack, true, \ 1198 "Enable the security JVM functions") \ 1199 \ 1200 develop(bool, ProtectionDomainVerification, true, \ 1201 "Verify protection domain before resolution in system dictionary")\ 1202 \ 1203 product(bool, ClassUnloading, true, \ 1204 "Do unloading of classes") \ 1205 \ 1206 product(bool, ClassUnloadingWithConcurrentMark, true, \ 1207 "Do unloading of classes with a concurrent marking cycle") \ 1208 \ 1209 develop(bool, DisableStartThread, false, \ 1210 "Disable starting of additional Java threads " \ 1211 "(for debugging only)") \ 1212 \ 1213 develop(bool, MemProfiling, false, \ 1214 "Write memory usage profiling to log file") \ 1215 \ 1216 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1217 "Print the system dictionary at exit") \ 1218 \ 1219 experimental(intx, PredictedLoadedClassCount, 0, \ 1220 "Experimental: Tune loaded class cache starting size") \ 1221 \ 1222 diagnostic(bool, UnsyncloadClass, false, \ 1223 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1224 "class loader must call VM synchronized for findClass " \ 1225 "and defineClass.") \ 1226 \ 1227 product(bool, AlwaysLockClassLoader, false, \ 1228 "Require the VM to acquire the class loader lock before calling " \ 1229 "loadClass() even for class loaders registering " \ 1230 "as parallel capable") \ 1231 \ 1232 product(bool, AllowParallelDefineClass, false, \ 1233 "Allow parallel defineClass requests for class loaders " \ 1234 "registering as parallel capable") \ 1235 \ 1236 product(bool, MustCallLoadClassInternal, false, \ 1237 "Call loadClassInternal() rather than loadClass()") \ 1238 \ 1239 product_pd(bool, DontYieldALot, \ 1240 "Throw away obvious excess yield calls") \ 1241 \ 1242 product(bool, ConvertSleepToYield, true, \ 1243 "Convert sleep(0) to thread yield ") \ 1244 \ 1245 product(bool, ConvertYieldToSleep, false, \ 1246 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1247 "behavior") \ 1248 \ 1249 develop(bool, UseDetachedThreads, true, \ 1250 "Use detached threads that are recycled upon termination " \ 1251 "(for Solaris only)") \ 1252 \ 1253 product(bool, UseLWPSynchronization, true, \ 1254 "Use LWP-based instead of libthread-based synchronization " \ 1255 "(SPARC only)") \ 1256 \ 1257 experimental(ccstr, SyncKnobs, NULL, \ 1258 "(Unstable) Various monitor synchronization tunables") \ 1259 \ 1260 experimental(intx, EmitSync, 0, \ 1261 "(Unsafe, Unstable) " \ 1262 "Control emission of inline sync fast-path code") \ 1263 \ 1264 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1265 range(0, max_jint) \ 1266 \ 1267 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1268 \ 1269 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1270 "Experimental Sync flags") \ 1271 \ 1272 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1273 \ 1274 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \ 1275 \ 1276 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1277 \ 1278 experimental(intx, hashCode, 5, \ 1279 "(Unstable) select hashCode generation algorithm") \ 1280 \ 1281 product(bool, FilterSpuriousWakeups, true, \ 1282 "When true prevents OS-level spurious, or premature, wakeups " \ 1283 "from Object.wait (Ignored for Windows)") \ 1284 \ 1285 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1286 \ 1287 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1288 \ 1289 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1290 \ 1291 develop(bool, UsePthreads, false, \ 1292 "Use pthread-based instead of libthread-based synchronization " \ 1293 "(SPARC only)") \ 1294 \ 1295 product(bool, ReduceSignalUsage, false, \ 1296 "Reduce the use of OS signals in Java and/or the VM") \ 1297 \ 1298 develop_pd(bool, ShareVtableStubs, \ 1299 "Share vtable stubs (smaller code but worse branch prediction") \ 1300 \ 1301 develop(bool, LoadLineNumberTables, true, \ 1302 "Tell whether the class file parser loads line number tables") \ 1303 \ 1304 develop(bool, LoadLocalVariableTables, true, \ 1305 "Tell whether the class file parser loads local variable tables") \ 1306 \ 1307 develop(bool, LoadLocalVariableTypeTables, true, \ 1308 "Tell whether the class file parser loads local variable type" \ 1309 "tables") \ 1310 \ 1311 product(bool, AllowUserSignalHandlers, false, \ 1312 "Do not complain if the application installs signal handlers " \ 1313 "(Solaris & Linux only)") \ 1314 \ 1315 product(bool, UseSignalChaining, true, \ 1316 "Use signal-chaining to invoke signal handlers installed " \ 1317 "by the application (Solaris & Linux only)") \ 1318 \ 1319 product(bool, AllowJNIEnvProxy, false, \ 1320 "Allow JNIEnv proxies for jdbx") \ 1321 \ 1322 product(bool, RestoreMXCSROnJNICalls, false, \ 1323 "Restore MXCSR when returning from JNI calls") \ 1324 \ 1325 product(bool, CheckJNICalls, false, \ 1326 "Verify all arguments to JNI calls") \ 1327 \ 1328 product(bool, CheckEndorsedAndExtDirs, false, \ 1329 "Verify the endorsed and extension directories are not used") \ 1330 \ 1331 product(bool, UseFastJNIAccessors, true, \ 1332 "Use optimized versions of Get<Primitive>Field") \ 1333 \ 1334 product(intx, MaxJNILocalCapacity, 65536, \ 1335 "Maximum allowable local JNI handle capacity to " \ 1336 "EnsureLocalCapacity() and PushLocalFrame(), " \ 1337 "where <= 0 is unlimited, default: 65536") \ 1338 range(min_intx, max_intx) \ 1339 \ 1340 product(bool, EagerXrunInit, false, \ 1341 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1342 "but not all -Xrun libraries may support the state of the VM " \ 1343 "at this time") \ 1344 \ 1345 product(bool, PreserveAllAnnotations, false, \ 1346 "Preserve RuntimeInvisibleAnnotations as well " \ 1347 "as RuntimeVisibleAnnotations") \ 1348 \ 1349 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1350 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1351 \ 1352 product(bool, UseXMMForArrayCopy, false, \ 1353 "Use SSE2 MOVQ instruction for Arraycopy") \ 1354 \ 1355 product(intx, FieldsAllocationStyle, 1, \ 1356 "0 - type based with oops first, " \ 1357 "1 - with oops last, " \ 1358 "2 - oops in super and sub classes are together") \ 1359 range(0, 2) \ 1360 \ 1361 product(bool, CompactFields, true, \ 1362 "Allocate nonstatic fields in gaps between previous fields") \ 1363 \ 1364 notproduct(bool, PrintFieldLayout, false, \ 1365 "Print field layout for each class") \ 1366 \ 1367 /* Need to limit the extent of the padding to reasonable size. */\ 1368 /* 8K is well beyond the reasonable HW cache line size, even with */\ 1369 /* aggressive prefetching, while still leaving the room for segregating */\ 1370 /* among the distinct pages. */\ 1371 product(intx, ContendedPaddingWidth, 128, \ 1372 "How many bytes to pad the fields/classes marked @Contended with")\ 1373 range(0, 8192) \ 1374 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 1375 \ 1376 product(bool, EnableContended, true, \ 1377 "Enable @Contended annotation support") \ 1378 \ 1379 product(bool, RestrictContended, true, \ 1380 "Restrict @Contended to trusted classes") \ 1381 \ 1382 product(bool, UseBiasedLocking, true, \ 1383 "Enable biased locking in JVM") \ 1384 \ 1385 product(intx, BiasedLockingStartupDelay, 4000, \ 1386 "Number of milliseconds to wait before enabling biased locking") \ 1387 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 1388 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 1389 \ 1390 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1391 "Print statistics of biased locking in JVM") \ 1392 \ 1393 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1394 "Threshold of number of revocations per type to try to " \ 1395 "rebias all objects in the heap of that type") \ 1396 range(0, max_intx) \ 1397 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 1398 \ 1399 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1400 "Threshold of number of revocations per type to permanently " \ 1401 "revoke biases of all objects in the heap of that type") \ 1402 range(0, max_intx) \ 1403 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 1404 \ 1405 product(intx, BiasedLockingDecayTime, 25000, \ 1406 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1407 "type after previous bulk rebias") \ 1408 range(500, max_intx) \ 1409 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 1410 \ 1411 product(bool, ExitOnOutOfMemoryError, false, \ 1412 "JVM exits on the first occurrence of an out-of-memory error") \ 1413 \ 1414 product(bool, CrashOnOutOfMemoryError, false, \ 1415 "JVM aborts, producing an error log and core/mini dump, on the " \ 1416 "first occurrence of an out-of-memory error") \ 1417 \ 1418 /* tracing */ \ 1419 \ 1420 develop(bool, StressRewriter, false, \ 1421 "Stress linktime bytecode rewriting") \ 1422 \ 1423 product(ccstr, TraceJVMTI, NULL, \ 1424 "Trace flags for JVMTI functions and events") \ 1425 \ 1426 /* This option can change an EMCP method into an obsolete method. */ \ 1427 /* This can affect tests that except specific methods to be EMCP. */ \ 1428 /* This option should be used with caution. */ \ 1429 product(bool, StressLdcRewrite, false, \ 1430 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1431 \ 1432 product(uintx, TraceRedefineClasses, 0, \ 1433 "Trace level for JVMTI RedefineClasses") \ 1434 range(0, 0xFFFFFFFF) \ 1435 \ 1436 /* change to false by default sometime after Mustang */ \ 1437 product(bool, VerifyMergedCPBytecodes, true, \ 1438 "Verify bytecodes after RedefineClasses constant pool merging") \ 1439 \ 1440 develop(bool, TraceJNIHandleAllocation, false, \ 1441 "Trace allocation/deallocation of JNI handle blocks") \ 1442 \ 1443 develop(bool, TraceBytecodes, false, \ 1444 "Trace bytecode execution") \ 1445 \ 1446 develop(bool, TraceICs, false, \ 1447 "Trace inline cache changes") \ 1448 \ 1449 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1450 "Trace method invocation counter overflow") \ 1451 \ 1452 develop(bool, TraceInlineCacheClearing, false, \ 1453 "Trace clearing of inline caches in nmethods") \ 1454 \ 1455 develop(bool, TraceDependencies, false, \ 1456 "Trace dependencies") \ 1457 \ 1458 develop(bool, VerifyDependencies, trueInDebug, \ 1459 "Exercise and verify the compilation dependency mechanism") \ 1460 \ 1461 develop(bool, TraceNewOopMapGeneration, false, \ 1462 "Trace OopMapGeneration") \ 1463 \ 1464 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1465 "Trace OopMapGeneration: print detailed cell states") \ 1466 \ 1467 develop(bool, TimeOopMap, false, \ 1468 "Time calls to GenerateOopMap::compute_map() in sum") \ 1469 \ 1470 develop(bool, TimeOopMap2, false, \ 1471 "Time calls to GenerateOopMap::compute_map() individually") \ 1472 \ 1473 develop(bool, TraceMonitorMismatch, false, \ 1474 "Trace monitor matching failures during OopMapGeneration") \ 1475 \ 1476 develop(bool, TraceOopMapRewrites, false, \ 1477 "Trace rewriting of method oops during oop map generation") \ 1478 \ 1479 develop(bool, TraceICBuffer, false, \ 1480 "Trace usage of IC buffer") \ 1481 \ 1482 develop(bool, TraceCompiledIC, false, \ 1483 "Trace changes of compiled IC") \ 1484 \ 1485 develop(bool, TraceProtectionDomainVerification, false, \ 1486 "Trace protection domain verification") \ 1487 \ 1488 develop(bool, TraceClearedExceptions, false, \ 1489 "Print when an exception is forcibly cleared") \ 1490 \ 1491 product(bool, TraceBiasedLocking, false, \ 1492 "Trace biased locking in JVM") \ 1493 \ 1494 /* gc */ \ 1495 \ 1496 product(bool, UseSerialGC, false, \ 1497 "Use the Serial garbage collector") \ 1498 \ 1499 product(bool, UseG1GC, false, \ 1500 "Use the Garbage-First garbage collector") \ 1501 \ 1502 product(bool, UseParallelGC, false, \ 1503 "Use the Parallel Scavenge garbage collector") \ 1504 \ 1505 product(bool, UseParallelOldGC, false, \ 1506 "Use the Parallel Old garbage collector") \ 1507 \ 1508 product(uintx, HeapMaximumCompactionInterval, 20, \ 1509 "How often should we maximally compact the heap (not allowing " \ 1510 "any dead space)") \ 1511 range(0, max_uintx) \ 1512 \ 1513 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1514 "The collection count for the first maximum compaction") \ 1515 range(0, max_uintx) \ 1516 \ 1517 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1518 "Use maximum compaction in the Parallel Old garbage collector " \ 1519 "for a system GC") \ 1520 \ 1521 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1522 "The mean used by the parallel compact dead wood " \ 1523 "limiter (a number between 0-100)") \ 1524 range(0, 100) \ 1525 \ 1526 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1527 "The standard deviation used by the parallel compact dead wood " \ 1528 "limiter (a number between 0-100)") \ 1529 range(0, 100) \ 1530 \ 1531 product(uint, ParallelGCThreads, 0, \ 1532 "Number of parallel threads parallel gc will use") \ 1533 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \ 1534 \ 1535 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \ 1536 "Use semaphore synchronization for the GC Threads, " \ 1537 "instead of synchronization based on mutexes") \ 1538 \ 1539 product(bool, UseDynamicNumberOfGCThreads, false, \ 1540 "Dynamically choose the number of parallel threads " \ 1541 "parallel gc will use") \ 1542 \ 1543 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1544 "Force dynamic selection of the number of " \ 1545 "parallel threads parallel gc will use to aid debugging") \ 1546 \ 1547 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1548 "Size of heap (bytes) per GC thread used in calculating the " \ 1549 "number of GC threads") \ 1550 range((size_t)os::vm_page_size(), (size_t)max_uintx) \ 1551 \ 1552 product(uint, ConcGCThreads, 0, \ 1553 "Number of threads concurrent gc will use") \ 1554 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \ 1555 \ 1556 product(uintx, GCTaskTimeStampEntries, 200, \ 1557 "Number of time stamp entries per gc worker thread") \ 1558 range(1, max_uintx) \ 1559 \ 1560 product(bool, AlwaysTenure, false, \ 1561 "Always tenure objects in eden (ParallelGC only)") \ 1562 \ 1563 product(bool, NeverTenure, false, \ 1564 "Never tenure objects in eden, may tenure on overflow " \ 1565 "(ParallelGC only)") \ 1566 \ 1567 product(bool, ScavengeBeforeFullGC, true, \ 1568 "Scavenge youngest generation before each full GC.") \ 1569 \ 1570 product(bool, UseConcMarkSweepGC, false, \ 1571 "Use Concurrent Mark-Sweep GC in the old generation") \ 1572 \ 1573 product(bool, ExplicitGCInvokesConcurrent, false, \ 1574 "A System.gc() request invokes a concurrent collection; " \ 1575 "(effective only when using concurrent collectors)") \ 1576 \ 1577 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1578 "A System.gc() request invokes a concurrent collection and " \ 1579 "also unloads classes during such a concurrent gc cycle " \ 1580 "(effective only when UseConcMarkSweepGC)") \ 1581 \ 1582 product(bool, GCLockerInvokesConcurrent, false, \ 1583 "The exit of a JNI critical section necessitating a scavenge, " \ 1584 "also kicks off a background concurrent collection") \ 1585 \ 1586 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1587 "How much the GC can expand the eden by while the GC locker " \ 1588 "is active (as a percentage)") \ 1589 range(0, 100) \ 1590 \ 1591 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1592 "Number of times to retry allocations when " \ 1593 "blocked by the GC locker") \ 1594 range(0, max_uintx) \ 1595 \ 1596 product(bool, UseCMSBestFit, true, \ 1597 "Use CMS best fit allocation strategy") \ 1598 \ 1599 product(bool, UseParNewGC, false, \ 1600 "Use parallel threads in the new generation") \ 1601 \ 1602 product(uintx, ParallelGCBufferWastePct, 10, \ 1603 "Wasted fraction of parallel allocation buffer") \ 1604 range(0, 100) \ 1605 \ 1606 product(uintx, TargetPLABWastePct, 10, \ 1607 "Target wasted space in last buffer as percent of overall " \ 1608 "allocation") \ 1609 range(1, 100) \ 1610 \ 1611 product(uintx, PLABWeight, 75, \ 1612 "Percentage (0-100) used to weight the current sample when " \ 1613 "computing exponentially decaying average for ResizePLAB") \ 1614 range(0, 100) \ 1615 \ 1616 product(bool, ResizePLAB, true, \ 1617 "Dynamically resize (survivor space) promotion LAB's") \ 1618 \ 1619 product(intx, ParGCArrayScanChunk, 50, \ 1620 "Scan a subset of object array and push remainder, if array is " \ 1621 "bigger than this") \ 1622 range(1, max_intx) \ 1623 \ 1624 product(bool, ParGCUseLocalOverflow, false, \ 1625 "Instead of a global overflow list, use local overflow stacks") \ 1626 \ 1627 product(bool, ParGCTrimOverflow, true, \ 1628 "Eagerly trim the local overflow lists " \ 1629 "(when ParGCUseLocalOverflow)") \ 1630 \ 1631 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1632 "Simulate work queue overflow in ParNew") \ 1633 \ 1634 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1635 "An `interval' counter that determines how frequently " \ 1636 "we simulate overflow; a smaller number increases frequency") \ 1637 \ 1638 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1639 "The desired number of objects to claim from the overflow list") \ 1640 range(0, max_uintx) \ 1641 \ 1642 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1643 "The number of strides per worker thread that we divide up the " \ 1644 "card table scanning work into") \ 1645 range(1, max_uintx) \ 1646 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \ 1647 \ 1648 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1649 "The number of cards in each chunk of the parallel chunks used " \ 1650 "during card table scanning") \ 1651 range(1, max_intx) \ 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 product(size_t, CMSRescanMultiple, 32, \ 1832 "Size (in cards) of CMS parallel rescan task") \ 1833 range(1, max_uintx) \ 1834 \ 1835 product(size_t, CMSConcMarkMultiple, 32, \ 1836 "Size (in cards) of CMS concurrent MT marking task") \ 1837 range(1, max_uintx) \ 1838 \ 1839 product(bool, CMSAbortSemantics, false, \ 1840 "Whether abort-on-overflow semantics is implemented") \ 1841 \ 1842 product(bool, CMSParallelInitialMarkEnabled, true, \ 1843 "Use the parallel initial mark.") \ 1844 \ 1845 product(bool, CMSParallelRemarkEnabled, true, \ 1846 "Whether parallel remark enabled (only if ParNewGC)") \ 1847 \ 1848 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1849 "Whether parallel remark of survivor space " \ 1850 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1851 \ 1852 product(bool, CMSPLABRecordAlways, true, \ 1853 "Always record survivor space PLAB boundaries (effective only " \ 1854 "if CMSParallelSurvivorRemarkEnabled)") \ 1855 \ 1856 product(bool, CMSEdenChunksRecordAlways, true, \ 1857 "Always record eden chunks used for the parallel initial mark " \ 1858 "or remark of eden") \ 1859 \ 1860 product(bool, CMSConcurrentMTEnabled, true, \ 1861 "Whether multi-threaded concurrent work enabled " \ 1862 "(effective only if ParNewGC)") \ 1863 \ 1864 product(bool, CMSPrecleaningEnabled, true, \ 1865 "Whether concurrent precleaning enabled") \ 1866 \ 1867 product(uintx, CMSPrecleanIter, 3, \ 1868 "Maximum number of precleaning iteration passes") \ 1869 range(0, 9) \ 1870 \ 1871 product(uintx, CMSPrecleanDenominator, 3, \ 1872 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1873 "ratio") \ 1874 range(1, max_uintx) \ 1875 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \ 1876 \ 1877 product(uintx, CMSPrecleanNumerator, 2, \ 1878 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1879 "ratio") \ 1880 range(0, max_uintx-1) \ 1881 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \ 1882 \ 1883 product(bool, CMSPrecleanRefLists1, true, \ 1884 "Preclean ref lists during (initial) preclean phase") \ 1885 \ 1886 product(bool, CMSPrecleanRefLists2, false, \ 1887 "Preclean ref lists during abortable preclean phase") \ 1888 \ 1889 product(bool, CMSPrecleanSurvivors1, false, \ 1890 "Preclean survivors during (initial) preclean phase") \ 1891 \ 1892 product(bool, CMSPrecleanSurvivors2, true, \ 1893 "Preclean survivors during abortable preclean phase") \ 1894 \ 1895 product(uintx, CMSPrecleanThreshold, 1000, \ 1896 "Do not iterate again if number of dirty cards is less than this")\ 1897 range(100, max_uintx) \ 1898 \ 1899 product(bool, CMSCleanOnEnter, true, \ 1900 "Clean-on-enter optimization for reducing number of dirty cards") \ 1901 \ 1902 product(uintx, CMSRemarkVerifyVariant, 1, \ 1903 "Choose variant (1,2) of verification following remark") \ 1904 range(1, 2) \ 1905 \ 1906 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1907 "If Eden size is below this, do not try to schedule remark") \ 1908 range(0, max_uintx) \ 1909 \ 1910 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1911 "The Eden occupancy percentage (0-100) at which " \ 1912 "to try and schedule remark pause") \ 1913 range(0, 100) \ 1914 \ 1915 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1916 "Start sampling eden top at least before young gen " \ 1917 "occupancy reaches 1/<ratio> of the size at which " \ 1918 "we plan to schedule remark") \ 1919 range(1, max_uintx) \ 1920 \ 1921 product(uintx, CMSSamplingGrain, 16*K, \ 1922 "The minimum distance between eden samples for CMS (see above)") \ 1923 range(1, max_uintx) \ 1924 \ 1925 product(bool, CMSScavengeBeforeRemark, false, \ 1926 "Attempt scavenge before the CMS remark step") \ 1927 \ 1928 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1929 "Don't drain below this size per parallel worker/thief") \ 1930 range(1, max_juint) \ 1931 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \ 1932 \ 1933 manageable(intx, CMSWaitDuration, 2000, \ 1934 "Time in milliseconds that CMS thread waits for young GC") \ 1935 range(min_jint, max_jint) \ 1936 \ 1937 develop(uintx, CMSCheckInterval, 1000, \ 1938 "Interval in milliseconds that CMS thread checks if it " \ 1939 "should start a collection cycle") \ 1940 \ 1941 product(bool, CMSYield, true, \ 1942 "Yield between steps of CMS") \ 1943 \ 1944 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1945 "Bitmap operations should process at most this many bits " \ 1946 "between yields") \ 1947 range(1, max_uintx) \ 1948 \ 1949 product(bool, CMSPrintChunksInDump, false, \ 1950 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \ 1951 "trace level include more detailed information about the" \ 1952 "free chunks") \ 1953 \ 1954 product(bool, CMSPrintObjectsInDump, false, \ 1955 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \ 1956 "trace level include more detailed information about the" \ 1957 "allocated objects") \ 1958 \ 1959 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1960 "Verify that all references across the FLS boundary " \ 1961 "are to valid objects") \ 1962 \ 1963 diagnostic(bool, FLSVerifyLists, false, \ 1964 "Do lots of (expensive) FreeListSpace verification") \ 1965 \ 1966 diagnostic(bool, FLSVerifyIndexTable, false, \ 1967 "Do lots of (expensive) FLS index table verification") \ 1968 \ 1969 develop(bool, FLSVerifyDictionary, false, \ 1970 "Do lots of (expensive) FLS dictionary verification") \ 1971 \ 1972 develop(bool, VerifyBlockOffsetArray, false, \ 1973 "Do (expensive) block offset array verification") \ 1974 \ 1975 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1976 "Maintain _unallocated_block in BlockOffsetArray " \ 1977 "(currently applicable only to CMS collector)") \ 1978 \ 1979 product(intx, RefDiscoveryPolicy, 0, \ 1980 "Select type of reference discovery policy: " \ 1981 "reference-based(0) or referent-based(1)") \ 1982 range(ReferenceProcessor::DiscoveryPolicyMin, \ 1983 ReferenceProcessor::DiscoveryPolicyMax) \ 1984 \ 1985 product(bool, ParallelRefProcEnabled, false, \ 1986 "Enable parallel reference processing whenever possible") \ 1987 \ 1988 product(bool, ParallelRefProcBalancingEnabled, true, \ 1989 "Enable balancing of reference processing queues") \ 1990 \ 1991 product(uintx, CMSTriggerRatio, 80, \ 1992 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1993 "allocated before a CMS collection cycle commences") \ 1994 range(0, 100) \ 1995 \ 1996 product(uintx, CMSBootstrapOccupancy, 50, \ 1997 "Percentage CMS generation occupancy at which to " \ 1998 "initiate CMS collection for bootstrapping collection stats") \ 1999 range(0, 100) \ 2000 \ 2001 product(intx, CMSInitiatingOccupancyFraction, -1, \ 2002 "Percentage CMS generation occupancy to start a CMS collection " \ 2003 "cycle. A negative value means that CMSTriggerRatio is used") \ 2004 range(min_intx, 100) \ 2005 \ 2006 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 2007 "The percent occupancy (IHOP) of the current old generation " \ 2008 "capacity above which a concurrent mark cycle will be initiated " \ 2009 "Its value may change over time if adaptive IHOP is enabled, " \ 2010 "otherwise the value remains constant. " \ 2011 "In the latter case a value of 0 will result as frequent as " \ 2012 "possible concurrent marking cycles. A value of 100 disables " \ 2013 "concurrent marking. " \ 2014 "Fragmentation waste in the old generation is not considered " \ 2015 "free space in this calculation. (G1 collector only)") \ 2016 range(0, 100) \ 2017 \ 2018 manageable(intx, CMSTriggerInterval, -1, \ 2019 "Commence a CMS collection cycle (at least) every so many " \ 2020 "milliseconds (0 permanently, -1 disabled)") \ 2021 range(-1, max_intx) \ 2022 \ 2023 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2024 "Only use occupancy as a criterion for starting a CMS collection")\ 2025 \ 2026 product(uintx, CMSIsTooFullPercentage, 98, \ 2027 "An absolute ceiling above which CMS will always consider the " \ 2028 "unloading of classes when class unloading is enabled") \ 2029 range(0, 100) \ 2030 \ 2031 develop(bool, CMSTestInFreeList, false, \ 2032 "Check if the coalesced range is already in the " \ 2033 "free lists as claimed") \ 2034 \ 2035 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2036 "Check that all the garbage collected was returned to the " \ 2037 "free lists") \ 2038 \ 2039 notproduct(bool, ScavengeALot, false, \ 2040 "Force scavenge at every Nth exit from the runtime system " \ 2041 "(N=ScavengeALotInterval)") \ 2042 \ 2043 develop(bool, FullGCALot, false, \ 2044 "Force full gc at every Nth exit from the runtime system " \ 2045 "(N=FullGCALotInterval)") \ 2046 \ 2047 notproduct(bool, GCALotAtAllSafepoints, false, \ 2048 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2049 \ 2050 notproduct(bool, PromotionFailureALot, false, \ 2051 "Use promotion failure handling on every youngest generation " \ 2052 "collection") \ 2053 \ 2054 develop(uintx, PromotionFailureALotCount, 1000, \ 2055 "Number of promotion failures occurring at PLAB " \ 2056 "refill attempts (ParNew) or promotion attempts " \ 2057 "(other young collectors)") \ 2058 \ 2059 develop(uintx, PromotionFailureALotInterval, 5, \ 2060 "Total collections between promotion failures a lot") \ 2061 \ 2062 experimental(uintx, WorkStealingSleepMillis, 1, \ 2063 "Sleep time when sleep is used for yields") \ 2064 \ 2065 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2066 "Number of yields before a sleep is done during work stealing") \ 2067 \ 2068 experimental(uintx, WorkStealingHardSpins, 4096, \ 2069 "Number of iterations in a spin loop between checks on " \ 2070 "time out of hard spin") \ 2071 \ 2072 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2073 "Ratio of hard spins to calls to yield") \ 2074 \ 2075 develop(uintx, ObjArrayMarkingStride, 512, \ 2076 "Number of object array elements to push onto the marking stack " \ 2077 "before pushing a continuation entry") \ 2078 \ 2079 develop(bool, MetadataAllocationFailALot, false, \ 2080 "Fail metadata allocations at intervals controlled by " \ 2081 "MetadataAllocationFailALotInterval") \ 2082 \ 2083 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2084 "Metadata allocation failure a lot interval") \ 2085 \ 2086 develop(bool, TraceMetadataChunkAllocation, false, \ 2087 "Trace chunk metadata allocations") \ 2088 \ 2089 notproduct(bool, ExecuteInternalVMTests, false, \ 2090 "Enable execution of internal VM tests") \ 2091 \ 2092 notproduct(bool, VerboseInternalVMTests, false, \ 2093 "Turn on logging for internal VM tests.") \ 2094 \ 2095 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2096 \ 2097 product_pd(bool, ResizeTLAB, \ 2098 "Dynamically resize TLAB size for threads") \ 2099 \ 2100 product(bool, ZeroTLAB, false, \ 2101 "Zero out the newly created TLAB") \ 2102 \ 2103 product(bool, FastTLABRefill, true, \ 2104 "Use fast TLAB refill code") \ 2105 \ 2106 product(bool, TLABStats, true, \ 2107 "Provide more detailed and expensive TLAB statistics.") \ 2108 \ 2109 product_pd(bool, NeverActAsServerClassMachine, \ 2110 "Never act like a server-class machine") \ 2111 \ 2112 product(bool, AlwaysActAsServerClassMachine, false, \ 2113 "Always act like a server-class machine") \ 2114 \ 2115 product_pd(uint64_t, MaxRAM, \ 2116 "Real memory size (in bytes) used to set maximum heap size") \ 2117 range(0, 0XFFFFFFFFFFFFFFFF) \ 2118 \ 2119 product(size_t, ErgoHeapSizeLimit, 0, \ 2120 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2121 "MaxRAM / MaxRAMFraction") \ 2122 range(0, max_uintx) \ 2123 \ 2124 product(uintx, MaxRAMFraction, 4, \ 2125 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2126 "size") \ 2127 range(1, max_uintx) \ 2128 \ 2129 product(uintx, MinRAMFraction, 2, \ 2130 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2131 "size on systems with small physical memory size") \ 2132 range(1, max_uintx) \ 2133 \ 2134 product(uintx, InitialRAMFraction, 64, \ 2135 "Fraction (1/n) of real memory used for initial heap size") \ 2136 range(1, max_uintx) \ 2137 \ 2138 develop(uintx, MaxVirtMemFraction, 2, \ 2139 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2140 "determining maximum heap size") \ 2141 \ 2142 product(bool, UseAutoGCSelectPolicy, false, \ 2143 "Use automatic collection selection policy") \ 2144 \ 2145 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2146 "Automatic GC selection pause threshold in milliseconds") \ 2147 range(0, max_uintx) \ 2148 \ 2149 product(bool, UseAdaptiveSizePolicy, true, \ 2150 "Use adaptive generation sizing policies") \ 2151 \ 2152 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2153 "Use adaptive survivor sizing policies") \ 2154 \ 2155 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2156 "Use adaptive young-old sizing policies at minor collections") \ 2157 \ 2158 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2159 "Use adaptive young-old sizing policies at major collections") \ 2160 \ 2161 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2162 "Include statistics from System.gc() for adaptive size policy") \ 2163 \ 2164 product(bool, UseAdaptiveGCBoundary, false, \ 2165 "Allow young-old boundary to move") \ 2166 \ 2167 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2168 "Resize the virtual spaces of the young or old generations") \ 2169 range(-1, 1) \ 2170 \ 2171 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2172 "Policy for changing generation size for throughput goals") \ 2173 range(0, 1) \ 2174 \ 2175 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2176 "Number of steps where heuristics is used before data is used") \ 2177 range(0, max_uintx) \ 2178 \ 2179 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2180 "Number of collections before the adaptive sizing is started") \ 2181 \ 2182 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2183 "Collection interval for printing information; zero means never") \ 2184 range(0, max_uintx) \ 2185 \ 2186 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2187 "Use adaptive minimum footprint as a goal") \ 2188 \ 2189 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2190 "Weight given to exponential resizing, between 0 and 100") \ 2191 range(0, 100) \ 2192 \ 2193 product(uintx, AdaptiveTimeWeight, 25, \ 2194 "Weight given to time in adaptive policy, between 0 and 100") \ 2195 range(0, 100) \ 2196 \ 2197 product(uintx, PausePadding, 1, \ 2198 "How much buffer to keep for pause time") \ 2199 range(0, max_juint) \ 2200 \ 2201 product(uintx, PromotedPadding, 3, \ 2202 "How much buffer to keep for promotion failure") \ 2203 range(0, max_juint) \ 2204 \ 2205 product(uintx, SurvivorPadding, 3, \ 2206 "How much buffer to keep for survivor overflow") \ 2207 range(0, max_juint) \ 2208 \ 2209 product(uintx, ThresholdTolerance, 10, \ 2210 "Allowed collection cost difference between generations") \ 2211 range(0, 100) \ 2212 \ 2213 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2214 "If collection costs are within margin, reduce both by full " \ 2215 "delta") \ 2216 range(0, 100) \ 2217 \ 2218 product(uintx, YoungGenerationSizeIncrement, 20, \ 2219 "Adaptive size percentage change in young generation") \ 2220 range(0, 100) \ 2221 \ 2222 product(uintx, YoungGenerationSizeSupplement, 80, \ 2223 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2224 range(0, 100) \ 2225 \ 2226 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2227 "Decay factor to YoungedGenerationSizeSupplement") \ 2228 range(1, max_uintx) \ 2229 \ 2230 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2231 "Adaptive size percentage change in tenured generation") \ 2232 range(0, 100) \ 2233 \ 2234 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2235 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2236 range(0, 100) \ 2237 \ 2238 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2239 "Decay factor to TenuredGenerationSizeIncrement") \ 2240 range(1, max_uintx) \ 2241 \ 2242 product(uintx, MaxGCPauseMillis, max_uintx, \ 2243 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2244 "or (G1 Only) the maximum GC time per MMU time slice") \ 2245 range(1, max_uintx) \ 2246 constraint(MaxGCPauseMillisConstraintFunc,AfterMemoryInit) \ 2247 \ 2248 product(uintx, GCPauseIntervalMillis, 0, \ 2249 "Time slice for MMU specification") \ 2250 constraint(GCPauseIntervalMillisConstraintFunc,AfterMemoryInit) \ 2251 \ 2252 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2253 "Adaptive size policy maximum GC minor pause time goal " \ 2254 "in millisecond") \ 2255 range(0, max_uintx) \ 2256 \ 2257 product(uintx, GCTimeRatio, 99, \ 2258 "Adaptive size policy application time to GC time ratio") \ 2259 range(0, max_juint) \ 2260 \ 2261 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2262 "Adaptive size scale down factor for shrinking") \ 2263 range(1, max_uintx) \ 2264 \ 2265 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2266 "Adaptive size decays the major cost for long major intervals") \ 2267 \ 2268 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2269 "Time scale over which major costs decay") \ 2270 range(0, max_uintx) \ 2271 \ 2272 product(uintx, MinSurvivorRatio, 3, \ 2273 "Minimum ratio of young generation/survivor space size") \ 2274 range(3, max_uintx) \ 2275 \ 2276 product(uintx, InitialSurvivorRatio, 8, \ 2277 "Initial ratio of young generation/survivor space size") \ 2278 range(0, max_uintx) \ 2279 \ 2280 product(size_t, BaseFootPrintEstimate, 256*M, \ 2281 "Estimate of footprint other than Java Heap") \ 2282 range(0, max_uintx) \ 2283 \ 2284 product(bool, UseGCOverheadLimit, true, \ 2285 "Use policy to limit of proportion of time spent in GC " \ 2286 "before an OutOfMemory error is thrown") \ 2287 \ 2288 product(uintx, GCTimeLimit, 98, \ 2289 "Limit of the proportion of time spent in GC before " \ 2290 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2291 range(0, 100) \ 2292 \ 2293 product(uintx, GCHeapFreeLimit, 2, \ 2294 "Minimum percentage of free space after a full GC before an " \ 2295 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2296 range(0, 100) \ 2297 \ 2298 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2299 "Number of consecutive collections before gc time limit fires") \ 2300 range(1, max_uintx) \ 2301 \ 2302 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2303 "How far ahead to prefetch destination area (<= 0 means off)") \ 2304 range(-1, max_jint) \ 2305 \ 2306 product(intx, PrefetchScanIntervalInBytes, -1, \ 2307 "How far ahead to prefetch scan area (<= 0 means off)") \ 2308 range(-1, max_jint) \ 2309 \ 2310 product(intx, PrefetchFieldsAhead, -1, \ 2311 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2312 range(-1, max_jint) \ 2313 \ 2314 diagnostic(bool, VerifyDuringStartup, false, \ 2315 "Verify memory system before executing any Java code " \ 2316 "during VM initialization") \ 2317 \ 2318 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2319 "Verify system before exiting") \ 2320 \ 2321 diagnostic(bool, VerifyBeforeGC, false, \ 2322 "Verify memory system before GC") \ 2323 \ 2324 diagnostic(bool, VerifyAfterGC, false, \ 2325 "Verify memory system after GC") \ 2326 \ 2327 diagnostic(bool, VerifyDuringGC, false, \ 2328 "Verify memory system during GC (between phases)") \ 2329 \ 2330 diagnostic(ccstrlist, VerifySubSet, "", \ 2331 "Memory sub-systems to verify when Verify*GC flag(s) " \ 2332 "are enabled. One or more sub-systems can be specified " \ 2333 "in a comma separated string. Sub-systems are: " \ 2334 "threads, heap, symbol_table, string_table, codecache, " \ 2335 "dictionary, classloader_data_graph, metaspace, jni_handles, " \ 2336 "c-heap, codecache_oops") \ 2337 \ 2338 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2339 "Enable parallel memory system verification") \ 2340 \ 2341 diagnostic(bool, DeferInitialCardMark, false, \ 2342 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2343 "may arise from new_pre_store_barrier") \ 2344 \ 2345 product(bool, UseCondCardMark, false, \ 2346 "Check for already marked card before updating card table") \ 2347 \ 2348 diagnostic(bool, VerifyRememberedSets, false, \ 2349 "Verify GC remembered sets") \ 2350 \ 2351 diagnostic(bool, VerifyObjectStartArray, true, \ 2352 "Verify GC object start array if verify before/after") \ 2353 \ 2354 product(bool, DisableExplicitGC, false, \ 2355 "Ignore calls to System.gc()") \ 2356 \ 2357 notproduct(bool, CheckMemoryInitialization, false, \ 2358 "Check memory initialization") \ 2359 \ 2360 diagnostic(bool, BindCMSThreadToCPU, false, \ 2361 "Bind CMS Thread to CPU if possible") \ 2362 \ 2363 diagnostic(uintx, CPUForCMSThread, 0, \ 2364 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2365 range(0, max_juint) \ 2366 \ 2367 product(bool, BindGCTaskThreadsToCPUs, false, \ 2368 "Bind GCTaskThreads to CPUs if possible") \ 2369 \ 2370 product(bool, UseGCTaskAffinity, false, \ 2371 "Use worker affinity when asking for GCTasks") \ 2372 \ 2373 product(uintx, ProcessDistributionStride, 4, \ 2374 "Stride through processors when distributing processes") \ 2375 range(0, max_juint) \ 2376 \ 2377 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2378 "Number of times the coordinator GC thread will sleep while " \ 2379 "yielding before giving up and resuming GC") \ 2380 range(0, max_juint) \ 2381 \ 2382 product(uintx, CMSYieldSleepCount, 0, \ 2383 "Number of times a GC thread (minus the coordinator) " \ 2384 "will sleep while yielding before giving up and resuming GC") \ 2385 range(0, max_juint) \ 2386 \ 2387 product(bool, PrintGC, false, \ 2388 "Print message at garbage collection. " \ 2389 "Deprecated, use -Xlog:gc instead.") \ 2390 \ 2391 product(bool, PrintGCDetails, false, \ 2392 "Print more details at garbage collection. " \ 2393 "Deprecated, use -Xlog:gc* instead.") \ 2394 \ 2395 develop(intx, ConcGCYieldTimeout, 0, \ 2396 "If non-zero, assert that GC threads yield within this " \ 2397 "number of milliseconds") \ 2398 range(0, max_intx) \ 2399 \ 2400 develop(bool, TraceFinalizerRegistration, false, \ 2401 "Trace registration of final references") \ 2402 \ 2403 notproduct(bool, TraceScavenge, false, \ 2404 "Trace scavenge") \ 2405 \ 2406 product(bool, IgnoreEmptyClassPaths, false, \ 2407 "Ignore empty path elements in -classpath") \ 2408 \ 2409 product(bool, TraceClassPaths, false, \ 2410 "Trace processing of class paths") \ 2411 \ 2412 product(bool, TraceClassLoadingPreorder, false, \ 2413 "Trace all classes loaded in order referenced (not loaded)") \ 2414 \ 2415 product_rw(bool, TraceLoaderConstraints, false, \ 2416 "Trace loader constraints") \ 2417 \ 2418 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2419 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2420 "Initial size of the boot class loader data metaspace") \ 2421 range(30*K, max_uintx/BytesPerWord) \ 2422 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 2423 \ 2424 product(bool, TraceYoungGenTime, false, \ 2425 "Trace accumulated time for young collection") \ 2426 \ 2427 product(bool, TraceOldGenTime, false, \ 2428 "Trace accumulated time for old collection") \ 2429 \ 2430 product(bool, PrintHeapAtSIGBREAK, true, \ 2431 "Print heap layout in response to SIGBREAK") \ 2432 \ 2433 manageable(bool, PrintClassHistogram, false, \ 2434 "Print a histogram of class instances") \ 2435 \ 2436 develop(bool, TraceWorkGang, false, \ 2437 "Trace activities of work gangs") \ 2438 \ 2439 develop(bool, TraceGCTaskManager, false, \ 2440 "Trace actions of the GC task manager") \ 2441 \ 2442 develop(bool, TraceGCTaskQueue, false, \ 2443 "Trace actions of the GC task queues") \ 2444 \ 2445 diagnostic(bool, TraceGCTaskThread, false, \ 2446 "Trace actions of the GC task threads") \ 2447 \ 2448 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2449 "Trace marking phase in ParallelOldGC") \ 2450 \ 2451 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2452 "Trace dense prefix computation for ParallelOldGC") \ 2453 \ 2454 develop(bool, IgnoreLibthreadGPFault, false, \ 2455 "Suppress workaround for libthread GP fault") \ 2456 \ 2457 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2458 "The percentage of the used heap that the instances of a class " \ 2459 "must occupy for the class to generate a trace event") \ 2460 range(0.0, 100.0) \ 2461 \ 2462 /* JVMTI heap profiling */ \ 2463 \ 2464 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2465 "Trace JVMTI object tagging calls") \ 2466 \ 2467 diagnostic(bool, VerifyBeforeIteration, false, \ 2468 "Verify memory system before JVMTI iteration") \ 2469 \ 2470 /* compiler interface */ \ 2471 \ 2472 develop(bool, CIPrintCompilerName, false, \ 2473 "when CIPrint is active, print the name of the active compiler") \ 2474 \ 2475 diagnostic(bool, CIPrintCompileQueue, false, \ 2476 "display the contents of the compile queue whenever a " \ 2477 "compilation is enqueued") \ 2478 \ 2479 develop(bool, CIPrintRequests, false, \ 2480 "display every request for compilation") \ 2481 \ 2482 product(bool, CITime, false, \ 2483 "collect timing information for compilation") \ 2484 \ 2485 develop(bool, CITimeVerbose, false, \ 2486 "be more verbose in compilation timings") \ 2487 \ 2488 develop(bool, CITimeEach, false, \ 2489 "display timing information after each successful compilation") \ 2490 \ 2491 develop(bool, CICountOSR, false, \ 2492 "use a separate counter when assigning ids to osr compilations") \ 2493 \ 2494 develop(bool, CICompileNatives, true, \ 2495 "compile native methods if supported by the compiler") \ 2496 \ 2497 develop_pd(bool, CICompileOSR, \ 2498 "compile on stack replacement methods if supported by the " \ 2499 "compiler") \ 2500 \ 2501 develop(bool, CIPrintMethodCodes, false, \ 2502 "print method bytecodes of the compiled code") \ 2503 \ 2504 develop(bool, CIPrintTypeFlow, false, \ 2505 "print the results of ciTypeFlow analysis") \ 2506 \ 2507 develop(bool, CITraceTypeFlow, false, \ 2508 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2509 \ 2510 develop(intx, OSROnlyBCI, -1, \ 2511 "OSR only at this bci. Negative values mean exclude that bci") \ 2512 \ 2513 /* compiler */ \ 2514 \ 2515 /* notice: the max range value here is max_jint, not max_intx */ \ 2516 /* because of overflow issue */ \ 2517 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2518 "Number of compiler threads to run") \ 2519 range(0, max_jint) \ 2520 constraint(CICompilerCountConstraintFunc, AtParse) \ 2521 \ 2522 product(intx, CompilationPolicyChoice, 0, \ 2523 "which compilation policy (0-3)") \ 2524 range(0, 3) \ 2525 \ 2526 develop(bool, UseStackBanging, true, \ 2527 "use stack banging for stack overflow checks (required for " \ 2528 "proper StackOverflow handling; disable only to measure cost " \ 2529 "of stackbanging)") \ 2530 \ 2531 develop(bool, UseStrictFP, true, \ 2532 "use strict fp if modifier strictfp is set") \ 2533 \ 2534 develop(bool, GenerateSynchronizationCode, true, \ 2535 "generate locking/unlocking code for synchronized methods and " \ 2536 "monitors") \ 2537 \ 2538 develop(bool, GenerateCompilerNullChecks, true, \ 2539 "Generate explicit null checks for loads/stores/calls") \ 2540 \ 2541 develop(bool, GenerateRangeChecks, true, \ 2542 "Generate range checks for array accesses") \ 2543 \ 2544 develop_pd(bool, ImplicitNullChecks, \ 2545 "Generate code for implicit null checks") \ 2546 \ 2547 product_pd(bool, TrapBasedNullChecks, \ 2548 "Generate code for null checks that uses a cmp and trap " \ 2549 "instruction raising SIGTRAP. This is only used if an access to" \ 2550 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2551 "ImplicitNullChecks don't work (PPC64).") \ 2552 \ 2553 product(bool, PrintSafepointStatistics, false, \ 2554 "Print statistics about safepoint synchronization") \ 2555 \ 2556 product(intx, PrintSafepointStatisticsCount, 300, \ 2557 "Total number of safepoint statistics collected " \ 2558 "before printing them out") \ 2559 range(1, max_intx) \ 2560 \ 2561 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2562 "Print safepoint statistics only when safepoint takes " \ 2563 "more than PrintSafepointSatisticsTimeout in millis") \ 2564 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 2565 NOT_LP64(range(-1, max_intx)) \ 2566 \ 2567 product(bool, TraceSafepointCleanupTime, false, \ 2568 "Print the break down of clean up tasks performed during " \ 2569 "safepoint") \ 2570 \ 2571 product(bool, Inline, true, \ 2572 "Enable inlining") \ 2573 \ 2574 product(bool, ClipInlining, true, \ 2575 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2576 \ 2577 develop(bool, UseCHA, true, \ 2578 "Enable CHA") \ 2579 \ 2580 product(bool, UseTypeProfile, true, \ 2581 "Check interpreter profile for historically monomorphic calls") \ 2582 \ 2583 diagnostic(bool, PrintInlining, false, \ 2584 "Print inlining optimizations") \ 2585 \ 2586 product(bool, UsePopCountInstruction, false, \ 2587 "Use population count instruction") \ 2588 \ 2589 develop(bool, EagerInitialization, false, \ 2590 "Eagerly initialize classes if possible") \ 2591 \ 2592 diagnostic(bool, LogTouchedMethods, false, \ 2593 "Log methods which have been ever touched in runtime") \ 2594 \ 2595 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 2596 "Print all methods that have been ever touched in runtime") \ 2597 \ 2598 develop(bool, TraceMethodReplacement, false, \ 2599 "Print when methods are replaced do to recompilation") \ 2600 \ 2601 develop(bool, PrintMethodFlushing, false, \ 2602 "Print the nmethods being flushed") \ 2603 \ 2604 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2605 "print statistics about method flushing") \ 2606 \ 2607 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2608 "Number of compiled code invocations after which " \ 2609 "the method is considered as hot by the flusher") \ 2610 range(1, max_jint) \ 2611 \ 2612 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2613 "Minimum number of sweeper passes before an nmethod " \ 2614 "can be flushed") \ 2615 range(0, max_intx) \ 2616 \ 2617 product(bool, UseCodeAging, true, \ 2618 "Insert counter to detect warm methods") \ 2619 \ 2620 diagnostic(bool, StressCodeAging, false, \ 2621 "Start with counters compiled in") \ 2622 \ 2623 develop(bool, UseRelocIndex, false, \ 2624 "Use an index to speed random access to relocations") \ 2625 \ 2626 develop(bool, StressCodeBuffers, false, \ 2627 "Exercise code buffer expansion and other rare state changes") \ 2628 \ 2629 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2630 "Generate extra debugging information for non-safepoints in " \ 2631 "nmethods") \ 2632 \ 2633 product(bool, PrintVMOptions, false, \ 2634 "Print flags that appeared on the command line") \ 2635 \ 2636 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2637 "Ignore unrecognized VM options") \ 2638 \ 2639 product(bool, PrintCommandLineFlags, false, \ 2640 "Print flags specified on command line or set by ergonomics") \ 2641 \ 2642 product(bool, PrintFlagsInitial, false, \ 2643 "Print all VM flags before argument processing and exit VM") \ 2644 \ 2645 product(bool, PrintFlagsFinal, false, \ 2646 "Print all VM flags after argument and ergonomic processing") \ 2647 \ 2648 notproduct(bool, PrintFlagsWithComments, false, \ 2649 "Print all VM flags with default values and descriptions and " \ 2650 "exit") \ 2651 \ 2652 product(bool, PrintFlagsRanges, false, \ 2653 "Print VM flags and their ranges and exit VM") \ 2654 \ 2655 diagnostic(bool, SerializeVMOutput, true, \ 2656 "Use a mutex to serialize output to tty and LogFile") \ 2657 \ 2658 diagnostic(bool, DisplayVMOutput, true, \ 2659 "Display all VM output on the tty, independently of LogVMOutput") \ 2660 \ 2661 diagnostic(bool, LogVMOutput, false, \ 2662 "Save VM output to LogFile") \ 2663 \ 2664 diagnostic(ccstr, LogFile, NULL, \ 2665 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2666 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2667 \ 2668 product(ccstr, ErrorFile, NULL, \ 2669 "If an error occurs, save the error data to this file " \ 2670 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2671 \ 2672 product(bool, DisplayVMOutputToStderr, false, \ 2673 "If DisplayVMOutput is true, display all VM output to stderr") \ 2674 \ 2675 product(bool, DisplayVMOutputToStdout, false, \ 2676 "If DisplayVMOutput is true, display all VM output to stdout") \ 2677 \ 2678 product(bool, UseHeavyMonitors, false, \ 2679 "use heavyweight instead of lightweight Java monitors") \ 2680 \ 2681 product(bool, PrintStringTableStatistics, false, \ 2682 "print statistics about the StringTable and SymbolTable") \ 2683 \ 2684 diagnostic(bool, VerifyStringTableAtExit, false, \ 2685 "verify StringTable contents at exit") \ 2686 \ 2687 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2688 "print histogram of the symbol table") \ 2689 \ 2690 notproduct(bool, ExitVMOnVerifyError, false, \ 2691 "standard exit from VM if bytecode verify error " \ 2692 "(only in debug mode)") \ 2693 \ 2694 diagnostic(ccstr, AbortVMOnException, NULL, \ 2695 "Call fatal if this exception is thrown. Example: " \ 2696 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2697 \ 2698 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 2699 "Call fatal if the exception pointed by AbortVMOnException " \ 2700 "has this message") \ 2701 \ 2702 develop(bool, DebugVtables, false, \ 2703 "add debugging code to vtable dispatch") \ 2704 \ 2705 notproduct(bool, PrintVtableStats, false, \ 2706 "print vtables stats at end of run") \ 2707 \ 2708 develop(bool, TraceCreateZombies, false, \ 2709 "trace creation of zombie nmethods") \ 2710 \ 2711 notproduct(bool, IgnoreLockingAssertions, false, \ 2712 "disable locking assertions (for speed)") \ 2713 \ 2714 product(bool, RangeCheckElimination, true, \ 2715 "Eliminate range checks") \ 2716 \ 2717 develop_pd(bool, UncommonNullCast, \ 2718 "track occurrences of null in casts; adjust compiler tactics") \ 2719 \ 2720 develop(bool, TypeProfileCasts, true, \ 2721 "treat casts like calls for purposes of type profiling") \ 2722 \ 2723 develop(bool, DelayCompilationDuringStartup, true, \ 2724 "Delay invoking the compiler until main application class is " \ 2725 "loaded") \ 2726 \ 2727 develop(bool, CompileTheWorld, false, \ 2728 "Compile all methods in all classes in bootstrap class path " \ 2729 "(stress test)") \ 2730 \ 2731 develop(bool, CompileTheWorldPreloadClasses, true, \ 2732 "Preload all classes used by a class before start loading") \ 2733 \ 2734 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2735 "Force a safepoint every n compiles so sweeper can keep up") \ 2736 \ 2737 develop(bool, FillDelaySlots, true, \ 2738 "Fill delay slots (on SPARC only)") \ 2739 \ 2740 develop(bool, TimeLivenessAnalysis, false, \ 2741 "Time computation of bytecode liveness analysis") \ 2742 \ 2743 develop(bool, TraceLivenessGen, false, \ 2744 "Trace the generation of liveness analysis information") \ 2745 \ 2746 notproduct(bool, TraceLivenessQuery, false, \ 2747 "Trace queries of liveness analysis information") \ 2748 \ 2749 notproduct(bool, CollectIndexSetStatistics, false, \ 2750 "Collect information about IndexSets") \ 2751 \ 2752 develop(bool, UseLoopSafepoints, true, \ 2753 "Generate Safepoint nodes in every loop") \ 2754 \ 2755 develop(intx, FastAllocateSizeLimit, 128*K, \ 2756 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2757 "Inline allocations larger than this in doublewords must go slow")\ 2758 \ 2759 product(bool, AggressiveOpts, false, \ 2760 "Enable aggressive optimizations - see arguments.cpp") \ 2761 \ 2762 product_pd(bool, CompactStrings, \ 2763 "Enable Strings to use single byte chars in backing store") \ 2764 \ 2765 product_pd(uintx, TypeProfileLevel, \ 2766 "=XYZ, with Z: Type profiling of arguments at call; " \ 2767 "Y: Type profiling of return value at call; " \ 2768 "X: Type profiling of parameters to methods; " \ 2769 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2770 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 2771 \ 2772 product(intx, TypeProfileArgsLimit, 2, \ 2773 "max number of call arguments to consider for type profiling") \ 2774 range(0, 16) \ 2775 \ 2776 product(intx, TypeProfileParmsLimit, 2, \ 2777 "max number of incoming parameters to consider for type profiling"\ 2778 ", -1 for all") \ 2779 range(-1, 64) \ 2780 \ 2781 /* statistics */ \ 2782 develop(bool, CountCompiledCalls, false, \ 2783 "Count method invocations") \ 2784 \ 2785 notproduct(bool, CountRuntimeCalls, false, \ 2786 "Count VM runtime calls") \ 2787 \ 2788 develop(bool, CountJNICalls, false, \ 2789 "Count jni method invocations") \ 2790 \ 2791 notproduct(bool, CountJVMCalls, false, \ 2792 "Count jvm method invocations") \ 2793 \ 2794 notproduct(bool, CountRemovableExceptions, false, \ 2795 "Count exceptions that could be replaced by branches due to " \ 2796 "inlining") \ 2797 \ 2798 notproduct(bool, ICMissHistogram, false, \ 2799 "Produce histogram of IC misses") \ 2800 \ 2801 /* interpreter */ \ 2802 develop(bool, ClearInterpreterLocals, false, \ 2803 "Always clear local variables of interpreter activations upon " \ 2804 "entry") \ 2805 \ 2806 product_pd(bool, RewriteBytecodes, \ 2807 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2808 \ 2809 product_pd(bool, RewriteFrequentPairs, \ 2810 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2811 \ 2812 diagnostic(bool, PrintInterpreter, false, \ 2813 "Print the generated interpreter code") \ 2814 \ 2815 product(bool, UseInterpreter, true, \ 2816 "Use interpreter for non-compiled methods") \ 2817 \ 2818 develop(bool, UseFastSignatureHandlers, true, \ 2819 "Use fast signature handlers for native calls") \ 2820 \ 2821 product(bool, UseLoopCounter, true, \ 2822 "Increment invocation counter on backward branch") \ 2823 \ 2824 product_pd(bool, UseOnStackReplacement, \ 2825 "Use on stack replacement, calls runtime if invoc. counter " \ 2826 "overflows in loop") \ 2827 \ 2828 notproduct(bool, TraceOnStackReplacement, false, \ 2829 "Trace on stack replacement") \ 2830 \ 2831 product_pd(bool, PreferInterpreterNativeStubs, \ 2832 "Use always interpreter stubs for native methods invoked via " \ 2833 "interpreter") \ 2834 \ 2835 develop(bool, CountBytecodes, false, \ 2836 "Count number of bytecodes executed") \ 2837 \ 2838 develop(bool, PrintBytecodeHistogram, false, \ 2839 "Print histogram of the executed bytecodes") \ 2840 \ 2841 develop(bool, PrintBytecodePairHistogram, false, \ 2842 "Print histogram of the executed bytecode pairs") \ 2843 \ 2844 diagnostic(bool, PrintSignatureHandlers, false, \ 2845 "Print code generated for native method signature handlers") \ 2846 \ 2847 develop(bool, VerifyOops, false, \ 2848 "Do plausibility checks for oops") \ 2849 \ 2850 develop(bool, CheckUnhandledOops, false, \ 2851 "Check for unhandled oops in VM code") \ 2852 \ 2853 develop(bool, VerifyJNIFields, trueInDebug, \ 2854 "Verify jfieldIDs for instance fields") \ 2855 \ 2856 notproduct(bool, VerifyJNIEnvThread, false, \ 2857 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2858 "from JNI") \ 2859 \ 2860 develop(bool, VerifyFPU, false, \ 2861 "Verify FPU state (check for NaN's, etc.)") \ 2862 \ 2863 develop(bool, VerifyThread, false, \ 2864 "Watch the thread register for corruption (SPARC only)") \ 2865 \ 2866 develop(bool, VerifyActivationFrameSize, false, \ 2867 "Verify that activation frame didn't become smaller than its " \ 2868 "minimal size") \ 2869 \ 2870 develop(bool, TraceFrequencyInlining, false, \ 2871 "Trace frequency based inlining") \ 2872 \ 2873 develop_pd(bool, InlineIntrinsics, \ 2874 "Inline intrinsics that can be statically resolved") \ 2875 \ 2876 product_pd(bool, ProfileInterpreter, \ 2877 "Profile at the bytecode level during interpretation") \ 2878 \ 2879 develop(bool, TraceProfileInterpreter, false, \ 2880 "Trace profiling at the bytecode level during interpretation. " \ 2881 "This outputs the profiling information collected to improve " \ 2882 "jit compilation.") \ 2883 \ 2884 develop_pd(bool, ProfileTraps, \ 2885 "Profile deoptimization traps at the bytecode level") \ 2886 \ 2887 product(intx, ProfileMaturityPercentage, 20, \ 2888 "number of method invocations/branches (expressed as % of " \ 2889 "CompileThreshold) before using the method's profile") \ 2890 range(0, 100) \ 2891 \ 2892 diagnostic(bool, PrintMethodData, false, \ 2893 "Print the results of +ProfileInterpreter at end of run") \ 2894 \ 2895 develop(bool, VerifyDataPointer, trueInDebug, \ 2896 "Verify the method data pointer during interpreter profiling") \ 2897 \ 2898 develop(bool, VerifyCompiledCode, false, \ 2899 "Include miscellaneous runtime verifications in nmethod code; " \ 2900 "default off because it disturbs nmethod size heuristics") \ 2901 \ 2902 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2903 "Manually make GC thread crash then dump java stack trace; " \ 2904 "Test only") \ 2905 \ 2906 /* compilation */ \ 2907 product(bool, UseCompiler, true, \ 2908 "Use Just-In-Time compilation") \ 2909 \ 2910 develop(bool, TraceCompilationPolicy, false, \ 2911 "Trace compilation policy") \ 2912 \ 2913 develop(bool, TimeCompilationPolicy, false, \ 2914 "Time the compilation policy") \ 2915 \ 2916 product(bool, UseCounterDecay, true, \ 2917 "Adjust recompilation counters") \ 2918 \ 2919 develop(intx, CounterHalfLifeTime, 30, \ 2920 "Half-life time of invocation counters (in seconds)") \ 2921 \ 2922 develop(intx, CounterDecayMinIntervalLength, 500, \ 2923 "The minimum interval (in milliseconds) between invocation of " \ 2924 "CounterDecay") \ 2925 \ 2926 product(bool, AlwaysCompileLoopMethods, false, \ 2927 "When using recompilation, never interpret methods " \ 2928 "containing loops") \ 2929 \ 2930 product(bool, DontCompileHugeMethods, true, \ 2931 "Do not compile methods > HugeMethodLimit") \ 2932 \ 2933 /* Bytecode escape analysis estimation. */ \ 2934 product(bool, EstimateArgEscape, true, \ 2935 "Analyze bytecodes to estimate escape state of arguments") \ 2936 \ 2937 product(intx, BCEATraceLevel, 0, \ 2938 "How much tracing to do of bytecode escape analysis estimates " \ 2939 "(0-3)") \ 2940 range(0, 3) \ 2941 \ 2942 product(intx, MaxBCEAEstimateLevel, 5, \ 2943 "Maximum number of nested calls that are analyzed by BC EA") \ 2944 range(0, max_jint) \ 2945 \ 2946 product(intx, MaxBCEAEstimateSize, 150, \ 2947 "Maximum bytecode size of a method to be analyzed by BC EA") \ 2948 range(0, max_jint) \ 2949 \ 2950 product(intx, AllocatePrefetchStyle, 1, \ 2951 "0 = no prefetch, " \ 2952 "1 = prefetch instructions for each allocation, " \ 2953 "2 = use TLAB watermark to gate allocation prefetch, " \ 2954 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2955 range(0, 3) \ 2956 \ 2957 product(intx, AllocatePrefetchDistance, -1, \ 2958 "Distance to prefetch ahead of allocation pointer. " \ 2959 "-1: use system-specific value (automatically determined") \ 2960 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 2961 \ 2962 product(intx, AllocatePrefetchLines, 3, \ 2963 "Number of lines to prefetch ahead of array allocation pointer") \ 2964 range(1, 64) \ 2965 \ 2966 product(intx, AllocateInstancePrefetchLines, 1, \ 2967 "Number of lines to prefetch ahead of instance allocation " \ 2968 "pointer") \ 2969 range(1, 64) \ 2970 \ 2971 product(intx, AllocatePrefetchStepSize, 16, \ 2972 "Step size in bytes of sequential prefetch instructions") \ 2973 range(1, 512) \ 2974 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 2975 \ 2976 product(intx, AllocatePrefetchInstr, 0, \ 2977 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2978 constraint(AllocatePrefetchInstrConstraintFunc, AfterErgo) \ 2979 \ 2980 /* deoptimization */ \ 2981 develop(bool, TraceDeoptimization, false, \ 2982 "Trace deoptimization") \ 2983 \ 2984 develop(bool, PrintDeoptimizationDetails, false, \ 2985 "Print more information about deoptimization") \ 2986 \ 2987 develop(bool, DebugDeoptimization, false, \ 2988 "Tracing various information while debugging deoptimization") \ 2989 \ 2990 product(intx, SelfDestructTimer, 0, \ 2991 "Will cause VM to terminate after a given time (in minutes) " \ 2992 "(0 means off)") \ 2993 range(0, max_intx) \ 2994 \ 2995 product(intx, MaxJavaStackTraceDepth, 1024, \ 2996 "The maximum number of lines in the stack trace for Java " \ 2997 "exceptions (0 means all)") \ 2998 range(0, max_jint/2) \ 2999 \ 3000 develop(bool, TraceStackWalk, false, \ 3001 "Trace stack walking") \ 3002 \ 3003 product(bool, MemberNameInStackFrame, true, \ 3004 "Use MemberName in StackFrame") \ 3005 \ 3006 /* notice: the max range value here is max_jint, not max_intx */ \ 3007 /* because of overflow issue */ \ 3008 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 3009 "Guarantee a safepoint (at least) every so many milliseconds " \ 3010 "(0 means none)")) \ 3011 NOT_EMBEDDED(range(0, max_jint)) \ 3012 \ 3013 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 3014 "Guarantee a safepoint (at least) every so many milliseconds " \ 3015 "(0 means none)")) \ 3016 EMBEDDED_ONLY(range(0, max_jint)) \ 3017 \ 3018 product(intx, SafepointTimeoutDelay, 10000, \ 3019 "Delay in milliseconds for option SafepointTimeout") \ 3020 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 3021 NOT_LP64(range(0, max_intx)) \ 3022 \ 3023 product(intx, NmethodSweepActivity, 10, \ 3024 "Removes cold nmethods from code cache if > 0. Higher values " \ 3025 "result in more aggressive sweeping") \ 3026 range(0, 2000) \ 3027 \ 3028 notproduct(bool, LogSweeper, false, \ 3029 "Keep a ring buffer of sweeper activity") \ 3030 \ 3031 notproduct(intx, SweeperLogEntries, 1024, \ 3032 "Number of records in the ring buffer of sweeper activity") \ 3033 \ 3034 notproduct(intx, MemProfilingInterval, 500, \ 3035 "Time between each invocation of the MemProfiler") \ 3036 \ 3037 develop(intx, MallocCatchPtr, -1, \ 3038 "Hit breakpoint when mallocing/freeing this pointer") \ 3039 \ 3040 notproduct(ccstrlist, SuppressErrorAt, "", \ 3041 "List of assertions (file:line) to muzzle") \ 3042 \ 3043 notproduct(size_t, HandleAllocationLimit, 1024, \ 3044 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 3045 "is used") \ 3046 \ 3047 develop(size_t, TotalHandleAllocationLimit, 1024, \ 3048 "Threshold for total handle allocation when " \ 3049 "+TraceHandleAllocation is used") \ 3050 \ 3051 develop(intx, StackPrintLimit, 100, \ 3052 "number of stack frames to print in VM-level stack dump") \ 3053 \ 3054 notproduct(intx, MaxElementPrintSize, 256, \ 3055 "maximum number of elements to print") \ 3056 \ 3057 notproduct(intx, MaxSubklassPrintSize, 4, \ 3058 "maximum number of subklasses to print when printing klass") \ 3059 \ 3060 product(intx, MaxInlineLevel, 9, \ 3061 "maximum number of nested calls that are inlined") \ 3062 range(0, max_jint) \ 3063 \ 3064 product(intx, MaxRecursiveInlineLevel, 1, \ 3065 "maximum number of nested recursive calls that are inlined") \ 3066 range(0, max_jint) \ 3067 \ 3068 develop(intx, MaxForceInlineLevel, 100, \ 3069 "maximum number of nested calls that are forced for inlining " \ 3070 "(using CompileCommand or marked w/ @ForceInline)") \ 3071 range(0, max_jint) \ 3072 \ 3073 product_pd(intx, InlineSmallCode, \ 3074 "Only inline already compiled methods if their code size is " \ 3075 "less than this") \ 3076 range(0, max_jint) \ 3077 \ 3078 product(intx, MaxInlineSize, 35, \ 3079 "The maximum bytecode size of a method to be inlined") \ 3080 range(0, max_jint) \ 3081 \ 3082 product_pd(intx, FreqInlineSize, \ 3083 "The maximum bytecode size of a frequent method to be inlined") \ 3084 range(0, max_jint) \ 3085 \ 3086 product(intx, MaxTrivialSize, 6, \ 3087 "The maximum bytecode size of a trivial method to be inlined") \ 3088 range(0, max_jint) \ 3089 \ 3090 product(intx, MinInliningThreshold, 250, \ 3091 "The minimum invocation count a method needs to have to be " \ 3092 "inlined") \ 3093 range(0, max_jint) \ 3094 \ 3095 develop(intx, MethodHistogramCutoff, 100, \ 3096 "The cutoff value for method invocation histogram (+CountCalls)") \ 3097 \ 3098 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3099 "Number of interpreted methods to show in profile") \ 3100 \ 3101 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 3102 "Number of compiled methods to show in profile") \ 3103 \ 3104 develop(intx, ProfilerNumberOfStubMethods, 25, \ 3105 "Number of stub methods to show in profile") \ 3106 \ 3107 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3108 "Number of runtime stub nodes to show in profile") \ 3109 \ 3110 product(intx, ProfileIntervalsTicks, 100, \ 3111 "Number of ticks between printing of interval profile " \ 3112 "(+ProfileIntervals)") \ 3113 range(0, max_intx) \ 3114 \ 3115 notproduct(intx, ScavengeALotInterval, 1, \ 3116 "Interval between which scavenge will occur with +ScavengeALot") \ 3117 \ 3118 notproduct(intx, FullGCALotInterval, 1, \ 3119 "Interval between which full gc will occur with +FullGCALot") \ 3120 \ 3121 notproduct(intx, FullGCALotStart, 0, \ 3122 "For which invocation to start FullGCAlot") \ 3123 \ 3124 notproduct(intx, FullGCALotDummies, 32*K, \ 3125 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3126 "to move") \ 3127 \ 3128 develop(intx, DontYieldALotInterval, 10, \ 3129 "Interval between which yields will be dropped (milliseconds)") \ 3130 \ 3131 develop(intx, MinSleepInterval, 1, \ 3132 "Minimum sleep() interval (milliseconds) when " \ 3133 "ConvertSleepToYield is off (used for Solaris)") \ 3134 \ 3135 develop(intx, ProfilerPCTickThreshold, 15, \ 3136 "Number of ticks in a PC buckets to be a hotspot") \ 3137 \ 3138 notproduct(intx, DeoptimizeALotInterval, 5, \ 3139 "Number of exits until DeoptimizeALot kicks in") \ 3140 \ 3141 notproduct(intx, ZombieALotInterval, 5, \ 3142 "Number of exits until ZombieALot kicks in") \ 3143 \ 3144 diagnostic(intx, MallocVerifyInterval, 0, \ 3145 "If non-zero, verify C heap after every N calls to " \ 3146 "malloc/realloc/free") \ 3147 range(0, max_intx) \ 3148 \ 3149 diagnostic(intx, MallocVerifyStart, 0, \ 3150 "If non-zero, start verifying C heap after Nth call to " \ 3151 "malloc/realloc/free") \ 3152 range(0, max_intx) \ 3153 \ 3154 diagnostic(uintx, MallocMaxTestWords, 0, \ 3155 "If non-zero, maximum number of words that malloc/realloc can " \ 3156 "allocate (for testing only)") \ 3157 range(0, max_uintx) \ 3158 \ 3159 product(intx, TypeProfileWidth, 2, \ 3160 "Number of receiver types to record in call/cast profile") \ 3161 range(0, 8) \ 3162 \ 3163 experimental(intx, MethodProfileWidth, 0, \ 3164 "Number of methods to record in call profile") \ 3165 \ 3166 develop(intx, BciProfileWidth, 2, \ 3167 "Number of return bci's to record in ret profile") \ 3168 \ 3169 product(intx, PerMethodRecompilationCutoff, 400, \ 3170 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3171 range(-1, max_intx) \ 3172 \ 3173 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3174 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3175 range(-1, max_intx) \ 3176 \ 3177 product(intx, PerMethodTrapLimit, 100, \ 3178 "Limit on traps (of one kind) in a method (includes inlines)") \ 3179 range(0, max_jint) \ 3180 \ 3181 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3182 "Limit on speculative traps (of one kind) in a method " \ 3183 "(includes inlines)") \ 3184 range(0, max_jint) \ 3185 \ 3186 product(intx, PerBytecodeTrapLimit, 4, \ 3187 "Limit on traps (of one kind) at a particular BCI") \ 3188 range(0, max_jint) \ 3189 \ 3190 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3191 "Extra method data trap entries for speculation") \ 3192 \ 3193 develop(intx, InlineFrequencyRatio, 20, \ 3194 "Ratio of call site execution to caller method invocation") \ 3195 range(0, max_jint) \ 3196 \ 3197 develop_pd(intx, InlineFrequencyCount, \ 3198 "Count of call site execution necessary to trigger frequent " \ 3199 "inlining") \ 3200 range(0, max_jint) \ 3201 \ 3202 develop(intx, InlineThrowCount, 50, \ 3203 "Force inlining of interpreted methods that throw this often") \ 3204 range(0, max_jint) \ 3205 \ 3206 develop(intx, InlineThrowMaxSize, 200, \ 3207 "Force inlining of throwing methods smaller than this") \ 3208 range(0, max_jint) \ 3209 \ 3210 develop(intx, ProfilerNodeSize, 1024, \ 3211 "Size in K to allocate for the Profile Nodes of each thread") \ 3212 range(0, 1024) \ 3213 \ 3214 /* gc parameters */ \ 3215 product(size_t, InitialHeapSize, 0, \ 3216 "Initial heap size (in bytes); zero means use ergonomics") \ 3217 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \ 3218 \ 3219 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3220 "Maximum heap size (in bytes)") \ 3221 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \ 3222 \ 3223 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3224 "Initial tenured generation size (in bytes)") \ 3225 range(0, max_uintx) \ 3226 \ 3227 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3228 "Initial new generation size (in bytes)") \ 3229 constraint(NewSizeConstraintFunc,AfterErgo) \ 3230 \ 3231 product(size_t, MaxNewSize, max_uintx, \ 3232 "Maximum new generation size (in bytes), max_uintx means set " \ 3233 "ergonomically") \ 3234 range(0, max_uintx) \ 3235 \ 3236 product_pd(size_t, HeapBaseMinAddress, \ 3237 "OS specific low limit for heap base address") \ 3238 constraint(HeapBaseMinAddressConstraintFunc,AfterErgo) \ 3239 \ 3240 product(size_t, PretenureSizeThreshold, 0, \ 3241 "Maximum size in bytes of objects allocated in DefNew " \ 3242 "generation; zero means no maximum") \ 3243 range(0, max_uintx) \ 3244 \ 3245 product(size_t, MinTLABSize, 2*K, \ 3246 "Minimum allowed TLAB size (in bytes)") \ 3247 range(1, max_uintx/2) \ 3248 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \ 3249 \ 3250 product(size_t, TLABSize, 0, \ 3251 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3252 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \ 3253 \ 3254 product(size_t, YoungPLABSize, 4096, \ 3255 "Size of young gen promotion LAB's (in HeapWords)") \ 3256 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \ 3257 \ 3258 product(size_t, OldPLABSize, 1024, \ 3259 "Size of old gen promotion LAB's (in HeapWords), or Number " \ 3260 "of blocks to attempt to claim when refilling CMS LAB's") \ 3261 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \ 3262 \ 3263 product(uintx, TLABAllocationWeight, 35, \ 3264 "Allocation averaging weight") \ 3265 range(0, 100) \ 3266 \ 3267 /* Limit the lower bound of this flag to 1 as it is used */ \ 3268 /* in a division expression. */ \ 3269 product(uintx, TLABWasteTargetPercent, 1, \ 3270 "Percentage of Eden that can be wasted") \ 3271 range(1, 100) \ 3272 \ 3273 product(uintx, TLABRefillWasteFraction, 64, \ 3274 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3275 range(1, max_juint) \ 3276 \ 3277 product(uintx, TLABWasteIncrement, 4, \ 3278 "Increment allowed waste at slow allocation") \ 3279 range(0, max_jint) \ 3280 constraint(TLABWasteIncrementConstraintFunc,AfterMemoryInit) \ 3281 \ 3282 product(uintx, SurvivorRatio, 8, \ 3283 "Ratio of eden/survivor space size") \ 3284 range(1, max_uintx-2) \ 3285 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \ 3286 \ 3287 product(uintx, NewRatio, 2, \ 3288 "Ratio of old/new generation sizes") \ 3289 range(0, max_uintx-1) \ 3290 \ 3291 product_pd(size_t, NewSizeThreadIncrease, \ 3292 "Additional size added to desired new generation size per " \ 3293 "non-daemon thread (in bytes)") \ 3294 range(0, max_uintx) \ 3295 \ 3296 product_pd(size_t, MetaspaceSize, \ 3297 "Initial size of Metaspaces (in bytes)") \ 3298 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 3299 \ 3300 product(size_t, MaxMetaspaceSize, max_uintx, \ 3301 "Maximum size of Metaspaces (in bytes)") \ 3302 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 3303 \ 3304 product(size_t, CompressedClassSpaceSize, 1*G, \ 3305 "Maximum size of class area in Metaspace when compressed " \ 3306 "class pointers are used") \ 3307 range(1*M, 3*G) \ 3308 \ 3309 manageable(uintx, MinHeapFreeRatio, 40, \ 3310 "The minimum percentage of heap free after GC to avoid expansion."\ 3311 " For most GCs this applies to the old generation. In G1 and" \ 3312 " ParallelGC it applies to the whole heap.") \ 3313 range(0, 100) \ 3314 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 3315 \ 3316 manageable(uintx, MaxHeapFreeRatio, 70, \ 3317 "The maximum percentage of heap free after GC to avoid shrinking."\ 3318 " For most GCs this applies to the old generation. In G1 and" \ 3319 " ParallelGC it applies to the whole heap.") \ 3320 range(0, 100) \ 3321 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 3322 \ 3323 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3324 "Number of milliseconds per MB of free space in the heap") \ 3325 range(0, max_intx) \ 3326 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 3327 \ 3328 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3329 "The minimum change in heap space due to GC (in bytes)") \ 3330 range(0, max_uintx) \ 3331 \ 3332 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3333 "The minimum expansion of Metaspace (in bytes)") \ 3334 range(0, max_uintx) \ 3335 \ 3336 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3337 "The maximum percentage of Metaspace free after GC to avoid " \ 3338 "shrinking") \ 3339 range(0, 100) \ 3340 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3341 \ 3342 product(uintx, MinMetaspaceFreeRatio, 40, \ 3343 "The minimum percentage of Metaspace free after GC to avoid " \ 3344 "expansion") \ 3345 range(0, 99) \ 3346 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3347 \ 3348 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3349 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3350 range(0, max_uintx) \ 3351 \ 3352 product(uintx, QueuedAllocationWarningCount, 0, \ 3353 "Number of times an allocation that queues behind a GC " \ 3354 "will retry before printing a warning") \ 3355 range(0, max_uintx) \ 3356 \ 3357 diagnostic(uintx, VerifyGCStartAt, 0, \ 3358 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3359 range(0, max_uintx) \ 3360 \ 3361 diagnostic(intx, VerifyGCLevel, 0, \ 3362 "Generation level at which to start +VerifyBefore/AfterGC") \ 3363 range(0, 1) \ 3364 \ 3365 product(uintx, MaxTenuringThreshold, 15, \ 3366 "Maximum value for tenuring threshold") \ 3367 range(0, markOopDesc::max_age + 1) \ 3368 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \ 3369 \ 3370 product(uintx, InitialTenuringThreshold, 7, \ 3371 "Initial value for tenuring threshold") \ 3372 range(0, markOopDesc::max_age + 1) \ 3373 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \ 3374 \ 3375 product(uintx, TargetSurvivorRatio, 50, \ 3376 "Desired percentage of survivor space used after scavenge") \ 3377 range(0, 100) \ 3378 \ 3379 product(uintx, MarkSweepDeadRatio, 5, \ 3380 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3381 "Serial mark sweep treats this as both the minimum and maximum " \ 3382 "value. " \ 3383 "CMS uses this value only if it falls back to mark sweep. " \ 3384 "Par compact uses a variable scale based on the density of the " \ 3385 "generation and treats this as the maximum value when the heap " \ 3386 "is either completely full or completely empty. Par compact " \ 3387 "also has a smaller default value; see arguments.cpp.") \ 3388 range(0, 100) \ 3389 \ 3390 product(uint, MarkSweepAlwaysCompactCount, 4, \ 3391 "How often should we fully compact the heap (ignoring the dead " \ 3392 "space parameters)") \ 3393 range(1, max_juint) \ 3394 \ 3395 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3396 "Delay between expansion and allocation (in milliseconds)") \ 3397 \ 3398 develop(uintx, GCWorkerDelayMillis, 0, \ 3399 "Delay in scheduling GC workers (in milliseconds)") \ 3400 \ 3401 product(intx, DeferThrSuspendLoopCount, 4000, \ 3402 "(Unstable) Number of times to iterate in safepoint loop " \ 3403 "before blocking VM threads ") \ 3404 range(-1, max_jint-1) \ 3405 \ 3406 product(intx, DeferPollingPageLoopCount, -1, \ 3407 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3408 "before changing safepoint polling page to RO ") \ 3409 range(-1, max_jint-1) \ 3410 \ 3411 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3412 range(0, max_intx) \ 3413 \ 3414 product(bool, PSChunkLargeArrays, true, \ 3415 "Process large arrays in chunks") \ 3416 \ 3417 product(uintx, GCDrainStackTargetSize, 64, \ 3418 "Number of entries we will try to leave on the stack " \ 3419 "during parallel gc") \ 3420 range(0, max_juint) \ 3421 \ 3422 /* stack parameters */ \ 3423 product_pd(intx, StackYellowPages, \ 3424 "Number of yellow zone (recoverable overflows) pages of size " \ 3425 "4KB. If pages are bigger yellow zone is aligned up.") \ 3426 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 3427 \ 3428 product_pd(intx, StackRedPages, \ 3429 "Number of red zone (unrecoverable overflows) pages of size " \ 3430 "4KB. If pages are bigger red zone is aligned up.") \ 3431 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 3432 \ 3433 product_pd(intx, StackReservedPages, \ 3434 "Number of reserved zone (reserved to annotated methods) pages" \ 3435 " of size 4KB. If pages are bigger reserved zone is aligned up.") \ 3436 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ 3437 \ 3438 product(bool, RestrictReservedStack, true, \ 3439 "Restrict @ReservedStackAccess to trusted classes") \ 3440 \ 3441 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3442 product_pd(intx, StackShadowPages, \ 3443 "Number of shadow zone (for overflow checking) pages of size " \ 3444 "4KB. If pages are bigger shadow zone is aligned up. " \ 3445 "This should exceed the depth of the VM and native call stack.") \ 3446 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 3447 \ 3448 product_pd(intx, ThreadStackSize, \ 3449 "Thread Stack Size (in Kbytes)") \ 3450 range(0, (max_intx-os::vm_page_size())/(1 * K)) \ 3451 \ 3452 product_pd(intx, VMThreadStackSize, \ 3453 "Non-Java Thread Stack Size (in Kbytes)") \ 3454 range(0, max_intx/(1 * K)) \ 3455 \ 3456 product_pd(intx, CompilerThreadStackSize, \ 3457 "Compiler Thread Stack Size (in Kbytes)") \ 3458 range(0, max_intx/(1 * K)) \ 3459 \ 3460 develop_pd(size_t, JVMInvokeMethodSlack, \ 3461 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3462 \ 3463 /* code cache parameters */ \ 3464 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3465 develop(uintx, CodeCacheSegmentSize, \ 3466 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)), \ 3467 "Code cache segment size (in bytes) - smallest unit of " \ 3468 "allocation") \ 3469 range(1, 1024) \ 3470 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 3471 \ 3472 develop_pd(intx, CodeEntryAlignment, \ 3473 "Code entry alignment for generated code (in bytes)") \ 3474 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 3475 \ 3476 product_pd(intx, OptoLoopAlignment, \ 3477 "Align inner loops to zero relative to this modulus") \ 3478 range(1, 16) \ 3479 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 3480 \ 3481 product_pd(uintx, InitialCodeCacheSize, \ 3482 "Initial code cache size (in bytes)") \ 3483 range(0, max_uintx) \ 3484 \ 3485 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3486 "Minimum code cache size (in bytes) required to start VM.") \ 3487 range(0, max_uintx) \ 3488 \ 3489 product(bool, SegmentedCodeCache, false, \ 3490 "Use a segmented code cache") \ 3491 \ 3492 product_pd(uintx, ReservedCodeCacheSize, \ 3493 "Reserved code cache size (in bytes) - maximum code cache size") \ 3494 range(0, max_uintx) \ 3495 \ 3496 product_pd(uintx, NonProfiledCodeHeapSize, \ 3497 "Size of code heap with non-profiled methods (in bytes)") \ 3498 range(0, max_uintx) \ 3499 \ 3500 product_pd(uintx, ProfiledCodeHeapSize, \ 3501 "Size of code heap with profiled methods (in bytes)") \ 3502 range(0, max_uintx) \ 3503 \ 3504 product_pd(uintx, NonNMethodCodeHeapSize, \ 3505 "Size of code heap with non-nmethods (in bytes)") \ 3506 range(0, max_uintx) \ 3507 \ 3508 product_pd(uintx, CodeCacheExpansionSize, \ 3509 "Code cache expansion size (in bytes)") \ 3510 range(0, max_uintx) \ 3511 \ 3512 develop_pd(uintx, CodeCacheMinBlockLength, \ 3513 "Minimum number of segments in a code cache block") \ 3514 range(1, 100) \ 3515 \ 3516 notproduct(bool, ExitOnFullCodeCache, false, \ 3517 "Exit the VM if we fill the code cache") \ 3518 \ 3519 product(bool, UseCodeCacheFlushing, true, \ 3520 "Remove cold/old nmethods from the code cache") \ 3521 \ 3522 product(uintx, StartAggressiveSweepingAt, 10, \ 3523 "Start aggressive sweeping if X[%] of the code cache is free." \ 3524 "Segmented code cache: X[%] of the non-profiled heap." \ 3525 "Non-segmented code cache: X[%] of the total code cache") \ 3526 range(0, 100) \ 3527 \ 3528 /* interpreter debugging */ \ 3529 develop(intx, BinarySwitchThreshold, 5, \ 3530 "Minimal number of lookupswitch entries for rewriting to binary " \ 3531 "switch") \ 3532 \ 3533 develop(intx, StopInterpreterAt, 0, \ 3534 "Stop interpreter execution at specified bytecode number") \ 3535 \ 3536 develop(intx, TraceBytecodesAt, 0, \ 3537 "Trace bytecodes starting with specified bytecode number") \ 3538 \ 3539 /* compiler interface */ \ 3540 develop(intx, CIStart, 0, \ 3541 "The id of the first compilation to permit") \ 3542 \ 3543 develop(intx, CIStop, max_jint, \ 3544 "The id of the last compilation to permit") \ 3545 \ 3546 develop(intx, CIStartOSR, 0, \ 3547 "The id of the first osr compilation to permit " \ 3548 "(CICountOSR must be on)") \ 3549 \ 3550 develop(intx, CIStopOSR, max_jint, \ 3551 "The id of the last osr compilation to permit " \ 3552 "(CICountOSR must be on)") \ 3553 \ 3554 develop(intx, CIBreakAtOSR, -1, \ 3555 "The id of osr compilation to break at") \ 3556 \ 3557 develop(intx, CIBreakAt, -1, \ 3558 "The id of compilation to break at") \ 3559 \ 3560 product(ccstrlist, CompileOnly, "", \ 3561 "List of methods (pkg/class.name) to restrict compilation to") \ 3562 \ 3563 product(ccstr, CompileCommandFile, NULL, \ 3564 "Read compiler commands from this file [.hotspot_compiler]") \ 3565 \ 3566 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 3567 "Read compiler directives from this file") \ 3568 \ 3569 product(ccstrlist, CompileCommand, "", \ 3570 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3571 \ 3572 develop(bool, ReplayCompiles, false, \ 3573 "Enable replay of compilations from ReplayDataFile") \ 3574 \ 3575 product(ccstr, ReplayDataFile, NULL, \ 3576 "File containing compilation replay information" \ 3577 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3578 \ 3579 product(ccstr, InlineDataFile, NULL, \ 3580 "File containing inlining replay information" \ 3581 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3582 \ 3583 develop(intx, ReplaySuppressInitializers, 2, \ 3584 "Control handling of class initialization during replay: " \ 3585 "0 - don't do anything special; " \ 3586 "1 - treat all class initializers as empty; " \ 3587 "2 - treat class initializers for application classes as empty; " \ 3588 "3 - allow all class initializers to run during bootstrap but " \ 3589 " pretend they are empty after starting replay") \ 3590 range(0, 3) \ 3591 \ 3592 develop(bool, ReplayIgnoreInitErrors, false, \ 3593 "Ignore exceptions thrown during initialization for replay") \ 3594 \ 3595 product(bool, DumpReplayDataOnError, true, \ 3596 "Record replay data for crashing compiler threads") \ 3597 \ 3598 product(bool, CICompilerCountPerCPU, false, \ 3599 "1 compiler thread for log(N CPUs)") \ 3600 \ 3601 develop(intx, CIFireOOMAt, -1, \ 3602 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3603 "(non-negative value throws OOM after this many CI accesses " \ 3604 "in each compile)") \ 3605 notproduct(intx, CICrashAt, -1, \ 3606 "id of compilation to trigger assert in compiler thread for " \ 3607 "the purpose of testing, e.g. generation of replay data") \ 3608 notproduct(bool, CIObjectFactoryVerify, false, \ 3609 "enable potentially expensive verification in ciObjectFactory") \ 3610 \ 3611 /* Priorities */ \ 3612 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3613 \ 3614 product(intx, ThreadPriorityPolicy, 0, \ 3615 "0 : Normal. "\ 3616 " VM chooses priorities that are appropriate for normal "\ 3617 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3618 " to normal native priority. Java priorities below " \ 3619 " NORM_PRIORITY map to lower native priority values. On "\ 3620 " Windows applications are allowed to use higher native "\ 3621 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3622 " not use the highest possible native priority, "\ 3623 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3624 " system threads. On Linux thread priorities are ignored "\ 3625 " because the OS does not support static priority in "\ 3626 " SCHED_OTHER scheduling class which is the only choice for "\ 3627 " non-root, non-realtime applications. "\ 3628 "1 : Aggressive. "\ 3629 " Java thread priorities map over to the entire range of "\ 3630 " native thread priorities. Higher Java thread priorities map "\ 3631 " to higher native thread priorities. This policy should be "\ 3632 " used with care, as sometimes it can cause performance "\ 3633 " degradation in the application and/or the entire system. On "\ 3634 " Linux this policy requires root privilege.") \ 3635 range(0, 1) \ 3636 \ 3637 product(bool, ThreadPriorityVerbose, false, \ 3638 "Print priority changes") \ 3639 \ 3640 product(intx, CompilerThreadPriority, -1, \ 3641 "The native priority at which compiler threads should run " \ 3642 "(-1 means no change)") \ 3643 range(min_jint, max_jint) \ 3644 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 3645 \ 3646 product(intx, VMThreadPriority, -1, \ 3647 "The native priority at which the VM thread should run " \ 3648 "(-1 means no change)") \ 3649 range(-1, 127) \ 3650 \ 3651 product(bool, CompilerThreadHintNoPreempt, true, \ 3652 "(Solaris only) Give compiler threads an extra quanta") \ 3653 \ 3654 product(bool, VMThreadHintNoPreempt, false, \ 3655 "(Solaris only) Give VM thread an extra quanta") \ 3656 \ 3657 product(intx, JavaPriority1_To_OSPriority, -1, \ 3658 "Map Java priorities to OS priorities") \ 3659 range(-1, 127) \ 3660 \ 3661 product(intx, JavaPriority2_To_OSPriority, -1, \ 3662 "Map Java priorities to OS priorities") \ 3663 range(-1, 127) \ 3664 \ 3665 product(intx, JavaPriority3_To_OSPriority, -1, \ 3666 "Map Java priorities to OS priorities") \ 3667 range(-1, 127) \ 3668 \ 3669 product(intx, JavaPriority4_To_OSPriority, -1, \ 3670 "Map Java priorities to OS priorities") \ 3671 range(-1, 127) \ 3672 \ 3673 product(intx, JavaPriority5_To_OSPriority, -1, \ 3674 "Map Java priorities to OS priorities") \ 3675 range(-1, 127) \ 3676 \ 3677 product(intx, JavaPriority6_To_OSPriority, -1, \ 3678 "Map Java priorities to OS priorities") \ 3679 range(-1, 127) \ 3680 \ 3681 product(intx, JavaPriority7_To_OSPriority, -1, \ 3682 "Map Java priorities to OS priorities") \ 3683 range(-1, 127) \ 3684 \ 3685 product(intx, JavaPriority8_To_OSPriority, -1, \ 3686 "Map Java priorities to OS priorities") \ 3687 range(-1, 127) \ 3688 \ 3689 product(intx, JavaPriority9_To_OSPriority, -1, \ 3690 "Map Java priorities to OS priorities") \ 3691 range(-1, 127) \ 3692 \ 3693 product(intx, JavaPriority10_To_OSPriority,-1, \ 3694 "Map Java priorities to OS priorities") \ 3695 range(-1, 127) \ 3696 \ 3697 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3698 "Java thread priority 10 maps to critical scheduling priority") \ 3699 \ 3700 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3701 "Compiler thread(s) run at critical scheduling priority") \ 3702 \ 3703 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3704 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3705 \ 3706 /* compiler debugging */ \ 3707 notproduct(intx, CompileTheWorldStartAt, 1, \ 3708 "First class to consider when using +CompileTheWorld") \ 3709 \ 3710 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3711 "Last class to consider when using +CompileTheWorld") \ 3712 \ 3713 develop(intx, NewCodeParameter, 0, \ 3714 "Testing Only: Create a dedicated integer parameter before " \ 3715 "putback") \ 3716 \ 3717 /* new oopmap storage allocation */ \ 3718 develop(intx, MinOopMapAllocation, 8, \ 3719 "Minimum number of OopMap entries in an OopMapSet") \ 3720 \ 3721 /* Background Compilation */ \ 3722 develop(intx, LongCompileThreshold, 50, \ 3723 "Used with +TraceLongCompiles") \ 3724 \ 3725 /* recompilation */ \ 3726 product_pd(intx, CompileThreshold, \ 3727 "number of interpreted method invocations before (re-)compiling") \ 3728 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 3729 \ 3730 product(double, CompileThresholdScaling, 1.0, \ 3731 "Factor to control when first compilation happens " \ 3732 "(both with and without tiered compilation): " \ 3733 "values greater than 1.0 delay counter overflow, " \ 3734 "values between 0 and 1.0 rush counter overflow, " \ 3735 "value of 1.0 leaves compilation thresholds unchanged " \ 3736 "value of 0.0 is equivalent to -Xint. " \ 3737 "" \ 3738 "Flag can be set as per-method option. " \ 3739 "If a value is specified for a method, compilation thresholds " \ 3740 "for that method are scaled by both the value of the global flag "\ 3741 "and the value of the per-method flag.") \ 3742 range(0.0, DBL_MAX) \ 3743 \ 3744 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3745 "Interpreter (tier 0) invocation notification frequency") \ 3746 range(0, 30) \ 3747 \ 3748 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3749 "C1 without MDO (tier 2) invocation notification frequency") \ 3750 range(0, 30) \ 3751 \ 3752 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3753 "C1 with MDO profiling (tier 3) invocation notification " \ 3754 "frequency") \ 3755 range(0, 30) \ 3756 \ 3757 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3758 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3759 range(0, 30) \ 3760 \ 3761 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3762 "Interpreter (tier 0) invocation notification frequency") \ 3763 range(0, 30) \ 3764 \ 3765 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3766 "C1 without MDO (tier 2) invocation notification frequency") \ 3767 range(0, 30) \ 3768 \ 3769 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3770 "C1 with MDO profiling (tier 3) invocation notification " \ 3771 "frequency") \ 3772 range(0, 30) \ 3773 \ 3774 product(intx, Tier2CompileThreshold, 0, \ 3775 "threshold at which tier 2 compilation is invoked") \ 3776 range(0, max_jint) \ 3777 \ 3778 product(intx, Tier2BackEdgeThreshold, 0, \ 3779 "Back edge threshold at which tier 2 compilation is invoked") \ 3780 range(0, max_jint) \ 3781 \ 3782 product(intx, Tier3InvocationThreshold, 200, \ 3783 "Compile if number of method invocations crosses this " \ 3784 "threshold") \ 3785 range(0, max_jint) \ 3786 \ 3787 product(intx, Tier3MinInvocationThreshold, 100, \ 3788 "Minimum invocation to compile at tier 3") \ 3789 range(0, max_jint) \ 3790 \ 3791 product(intx, Tier3CompileThreshold, 2000, \ 3792 "Threshold at which tier 3 compilation is invoked (invocation " \ 3793 "minimum must be satisfied)") \ 3794 range(0, max_jint) \ 3795 \ 3796 product(intx, Tier3BackEdgeThreshold, 60000, \ 3797 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3798 range(0, max_jint) \ 3799 \ 3800 product(intx, Tier4InvocationThreshold, 5000, \ 3801 "Compile if number of method invocations crosses this " \ 3802 "threshold") \ 3803 range(0, max_jint) \ 3804 \ 3805 product(intx, Tier4MinInvocationThreshold, 600, \ 3806 "Minimum invocation to compile at tier 4") \ 3807 range(0, max_jint) \ 3808 \ 3809 product(intx, Tier4CompileThreshold, 15000, \ 3810 "Threshold at which tier 4 compilation is invoked (invocation " \ 3811 "minimum must be satisfied") \ 3812 range(0, max_jint) \ 3813 \ 3814 product(intx, Tier4BackEdgeThreshold, 40000, \ 3815 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3816 range(0, max_jint) \ 3817 \ 3818 product(intx, Tier3DelayOn, 5, \ 3819 "If C2 queue size grows over this amount per compiler thread " \ 3820 "stop compiling at tier 3 and start compiling at tier 2") \ 3821 range(0, max_jint) \ 3822 \ 3823 product(intx, Tier3DelayOff, 2, \ 3824 "If C2 queue size is less than this amount per compiler thread " \ 3825 "allow methods compiled at tier 2 transition to tier 3") \ 3826 range(0, max_jint) \ 3827 \ 3828 product(intx, Tier3LoadFeedback, 5, \ 3829 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3830 "reaches this amount per compiler thread") \ 3831 range(0, max_jint) \ 3832 \ 3833 product(intx, Tier4LoadFeedback, 3, \ 3834 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3835 "reaches this amount per compiler thread") \ 3836 range(0, max_jint) \ 3837 \ 3838 product(intx, TieredCompileTaskTimeout, 50, \ 3839 "Kill compile task if method was not used within " \ 3840 "given timeout in milliseconds") \ 3841 range(0, max_intx) \ 3842 \ 3843 product(intx, TieredStopAtLevel, 4, \ 3844 "Stop at given compilation level") \ 3845 range(0, 4) \ 3846 \ 3847 product(intx, Tier0ProfilingStartPercentage, 200, \ 3848 "Start profiling in interpreter if the counters exceed tier 3 " \ 3849 "thresholds by the specified percentage") \ 3850 range(0, max_jint) \ 3851 \ 3852 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3853 "Increase the compile threshold for C1 compilation if the code " \ 3854 "cache is filled by the specified percentage") \ 3855 range(0, 99) \ 3856 \ 3857 product(intx, TieredRateUpdateMinTime, 1, \ 3858 "Minimum rate sampling interval (in milliseconds)") \ 3859 range(0, max_intx) \ 3860 \ 3861 product(intx, TieredRateUpdateMaxTime, 25, \ 3862 "Maximum rate sampling interval (in milliseconds)") \ 3863 range(0, max_intx) \ 3864 \ 3865 product_pd(bool, TieredCompilation, \ 3866 "Enable tiered compilation") \ 3867 \ 3868 product(bool, PrintTieredEvents, false, \ 3869 "Print tiered events notifications") \ 3870 \ 3871 product_pd(intx, OnStackReplacePercentage, \ 3872 "NON_TIERED number of method invocations/branches (expressed as " \ 3873 "% of CompileThreshold) before (re-)compiling OSR code") \ 3874 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 3875 \ 3876 product(intx, InterpreterProfilePercentage, 33, \ 3877 "NON_TIERED number of method invocations/branches (expressed as " \ 3878 "% of CompileThreshold) before profiling in the interpreter") \ 3879 range(0, 100) \ 3880 \ 3881 develop(intx, MaxRecompilationSearchLength, 10, \ 3882 "The maximum number of frames to inspect when searching for " \ 3883 "recompilee") \ 3884 \ 3885 develop(intx, MaxInterpretedSearchLength, 3, \ 3886 "The maximum number of interpreted frames to skip when searching "\ 3887 "for recompilee") \ 3888 \ 3889 develop(intx, DesiredMethodLimit, 8000, \ 3890 "The desired maximum method size (in bytecodes) after inlining") \ 3891 \ 3892 develop(intx, HugeMethodLimit, 8000, \ 3893 "Don't compile methods larger than this if " \ 3894 "+DontCompileHugeMethods") \ 3895 \ 3896 /* New JDK 1.4 reflection implementation */ \ 3897 \ 3898 develop(intx, FastSuperclassLimit, 8, \ 3899 "Depth of hardwired instanceof accelerator array") \ 3900 \ 3901 /* Properties for Java libraries */ \ 3902 \ 3903 product(size_t, MaxDirectMemorySize, 0, \ 3904 "Maximum total size of NIO direct-buffer allocations") \ 3905 range(0, (size_t)SIZE_MAX) \ 3906 \ 3907 /* Flags used for temporary code during development */ \ 3908 \ 3909 diagnostic(bool, UseNewCode, false, \ 3910 "Testing Only: Use the new version while testing") \ 3911 \ 3912 diagnostic(bool, UseNewCode2, false, \ 3913 "Testing Only: Use the new version while testing") \ 3914 \ 3915 diagnostic(bool, UseNewCode3, false, \ 3916 "Testing Only: Use the new version while testing") \ 3917 \ 3918 /* flags for performance data collection */ \ 3919 \ 3920 product(bool, UsePerfData, falseInEmbedded, \ 3921 "Flag to disable jvmstat instrumentation for performance testing "\ 3922 "and problem isolation purposes") \ 3923 \ 3924 product(bool, PerfDataSaveToFile, false, \ 3925 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3926 \ 3927 product(ccstr, PerfDataSaveFile, NULL, \ 3928 "Save PerfData memory to the specified absolute pathname. " \ 3929 "The string %p in the file name (if present) " \ 3930 "will be replaced by pid") \ 3931 \ 3932 product(intx, PerfDataSamplingInterval, 50, \ 3933 "Data sampling interval (in milliseconds)") \ 3934 range(PeriodicTask::min_interval, max_jint) \ 3935 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 3936 \ 3937 develop(bool, PerfTraceDataCreation, false, \ 3938 "Trace creation of Performance Data Entries") \ 3939 \ 3940 develop(bool, PerfTraceMemOps, false, \ 3941 "Trace PerfMemory create/attach/detach calls") \ 3942 \ 3943 product(bool, PerfDisableSharedMem, false, \ 3944 "Store performance data in standard memory") \ 3945 \ 3946 product(intx, PerfDataMemorySize, 32*K, \ 3947 "Size of performance data memory region. Will be rounded " \ 3948 "up to a multiple of the native os page size.") \ 3949 range(128, 32*64*K) \ 3950 \ 3951 product(intx, PerfMaxStringConstLength, 1024, \ 3952 "Maximum PerfStringConstant string length before truncation") \ 3953 range(32, 32*K) \ 3954 \ 3955 product(bool, PerfAllowAtExitRegistration, false, \ 3956 "Allow registration of atexit() methods") \ 3957 \ 3958 product(bool, PerfBypassFileSystemCheck, false, \ 3959 "Bypass Win32 file system criteria checks (Windows Only)") \ 3960 \ 3961 product(intx, UnguardOnExecutionViolation, 0, \ 3962 "Unguard page and retry on no-execute fault (Win32 only) " \ 3963 "0=off, 1=conservative, 2=aggressive") \ 3964 range(0, 2) \ 3965 \ 3966 /* Serviceability Support */ \ 3967 \ 3968 product(bool, ManagementServer, false, \ 3969 "Create JMX Management Server") \ 3970 \ 3971 product(bool, DisableAttachMechanism, false, \ 3972 "Disable mechanism that allows tools to attach to this VM") \ 3973 \ 3974 product(bool, StartAttachListener, false, \ 3975 "Always start Attach Listener at VM startup") \ 3976 \ 3977 manageable(bool, PrintConcurrentLocks, false, \ 3978 "Print java.util.concurrent locks in thread dump") \ 3979 \ 3980 product(bool, TransmitErrorReport, false, \ 3981 "Enable error report transmission on erroneous termination") \ 3982 \ 3983 product(ccstr, ErrorReportServer, NULL, \ 3984 "Override built-in error report server address") \ 3985 \ 3986 /* Shared spaces */ \ 3987 \ 3988 product(bool, UseSharedSpaces, true, \ 3989 "Use shared spaces for metadata") \ 3990 \ 3991 product(bool, VerifySharedSpaces, false, \ 3992 "Verify shared spaces (false for default archive, true for " \ 3993 "archive specified by -XX:SharedArchiveFile)") \ 3994 \ 3995 product(bool, RequireSharedSpaces, false, \ 3996 "Require shared spaces for metadata") \ 3997 \ 3998 product(bool, DumpSharedSpaces, false, \ 3999 "Special mode: JVM reads a class list, loads classes, builds " \ 4000 "shared spaces, and dumps the shared spaces to a file to be " \ 4001 "used in future JVM runs") \ 4002 \ 4003 product(bool, PrintSharedSpaces, false, \ 4004 "Print usage of shared spaces") \ 4005 \ 4006 product(bool, PrintSharedArchiveAndExit, false, \ 4007 "Print shared archive file contents") \ 4008 \ 4009 product(bool, PrintSharedDictionary, false, \ 4010 "If PrintSharedArchiveAndExit is true, also print the shared " \ 4011 "dictionary") \ 4012 \ 4013 product(size_t, SharedReadWriteSize, DEFAULT_SHARED_READ_WRITE_SIZE, \ 4014 "Size of read-write space for metadata (in bytes)") \ 4015 range(MIN_SHARED_READ_WRITE_SIZE, MAX_SHARED_READ_WRITE_SIZE) \ 4016 \ 4017 product(size_t, SharedReadOnlySize, DEFAULT_SHARED_READ_ONLY_SIZE, \ 4018 "Size of read-only space for metadata (in bytes)") \ 4019 range(MIN_SHARED_READ_ONLY_SIZE, MAX_SHARED_READ_ONLY_SIZE) \ 4020 \ 4021 product(size_t, SharedMiscDataSize, DEFAULT_SHARED_MISC_DATA_SIZE, \ 4022 "Size of the shared miscellaneous data area (in bytes)") \ 4023 range(MIN_SHARED_MISC_DATA_SIZE, MAX_SHARED_MISC_DATA_SIZE) \ 4024 \ 4025 product(size_t, SharedMiscCodeSize, DEFAULT_SHARED_MISC_CODE_SIZE, \ 4026 "Size of the shared miscellaneous code area (in bytes)") \ 4027 range(MIN_SHARED_MISC_CODE_SIZE, MAX_SHARED_MISC_CODE_SIZE) \ 4028 \ 4029 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 4030 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 4031 "Address to allocate shared memory region for class data") \ 4032 range(0, SIZE_MAX) \ 4033 \ 4034 product(uintx, SharedSymbolTableBucketSize, 4, \ 4035 "Average number of symbols per bucket in shared table") \ 4036 range(2, 246) \ 4037 \ 4038 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 4039 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 4040 "classes. Just exclude them from the shared dictionary.") \ 4041 \ 4042 diagnostic(bool, PrintMethodHandleStubs, false, \ 4043 "Print generated stub code for method handles") \ 4044 \ 4045 develop(bool, TraceMethodHandles, false, \ 4046 "trace internal method handle operations") \ 4047 \ 4048 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4049 "perform extra checks when constructing method handles") \ 4050 \ 4051 diagnostic(bool, ShowHiddenFrames, false, \ 4052 "show method handle implementation frames (usually hidden)") \ 4053 \ 4054 experimental(bool, TrustFinalNonStaticFields, false, \ 4055 "trust final non-static declarations for constant folding") \ 4056 \ 4057 diagnostic(bool, FoldStableValues, true, \ 4058 "Optimize loads from stable fields (marked w/ @Stable)") \ 4059 \ 4060 develop(bool, TraceInvokeDynamic, false, \ 4061 "trace internal invoke dynamic operations") \ 4062 \ 4063 diagnostic(bool, PauseAtStartup, false, \ 4064 "Causes the VM to pause at startup time and wait for the pause " \ 4065 "file to be removed (default: ./vm.paused.<pid>)") \ 4066 \ 4067 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4068 "The file to create and for whose removal to await when pausing " \ 4069 "at startup. (default: ./vm.paused.<pid>)") \ 4070 \ 4071 diagnostic(bool, PauseAtExit, false, \ 4072 "Pause and wait for keypress on exit if a debugger is attached") \ 4073 \ 4074 product(bool, ExtendedDTraceProbes, false, \ 4075 "Enable performance-impacting dtrace probes") \ 4076 \ 4077 product(bool, DTraceMethodProbes, false, \ 4078 "Enable dtrace probes for method-entry and method-exit") \ 4079 \ 4080 product(bool, DTraceAllocProbes, false, \ 4081 "Enable dtrace probes for object allocation") \ 4082 \ 4083 product(bool, DTraceMonitorProbes, false, \ 4084 "Enable dtrace probes for monitor events") \ 4085 \ 4086 product(bool, RelaxAccessControlCheck, false, \ 4087 "Relax the access control checks in the verifier") \ 4088 \ 4089 product(uintx, StringTableSize, defaultStringTableSize, \ 4090 "Number of buckets in the interned String table") \ 4091 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4092 \ 4093 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4094 "Number of buckets in the JVM internal Symbol table") \ 4095 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4096 \ 4097 product(bool, UseStringDeduplication, false, \ 4098 "Use string deduplication") \ 4099 \ 4100 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4101 "A string must reach this age (or be promoted to an old region) " \ 4102 "to be considered for deduplication") \ 4103 range(1, markOopDesc::max_age) \ 4104 \ 4105 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4106 "Force table resize every time the table is scanned") \ 4107 \ 4108 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4109 "Force table rehash every time the table is scanned") \ 4110 \ 4111 diagnostic(bool, WhiteBoxAPI, false, \ 4112 "Enable internal testing APIs") \ 4113 \ 4114 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4115 "Default survivor space alignment in bytes") \ 4116 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 4117 \ 4118 product(bool , AllowNonVirtualCalls, false, \ 4119 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4120 \ 4121 product(ccstr, DumpLoadedClassList, NULL, \ 4122 "Dump the names all loaded classes, that could be stored into " \ 4123 "the CDS archive, in the specified file") \ 4124 \ 4125 product(ccstr, SharedClassListFile, NULL, \ 4126 "Override the default CDS class list") \ 4127 \ 4128 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4129 "Override the default location of the CDS archive file") \ 4130 \ 4131 product(ccstr, ExtraSharedClassListFile, NULL, \ 4132 "Extra classlist for building the CDS archive file") \ 4133 \ 4134 experimental(size_t, ArrayAllocatorMallocLimit, \ 4135 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4136 "Allocation less than this value will be allocated " \ 4137 "using malloc. Larger allocations will use mmap.") \ 4138 \ 4139 experimental(bool, AlwaysAtomicAccesses, false, \ 4140 "Accesses to all variables should always be atomic") \ 4141 \ 4142 product(bool, EnableTracing, false, \ 4143 "Enable event-based tracing") \ 4144 \ 4145 product(bool, UseLockedTracing, false, \ 4146 "Use locked-tracing when doing event-based tracing") \ 4147 \ 4148 diagnostic(bool, UseUnalignedAccesses, false, \ 4149 "Use unaligned memory accesses in Unsafe") \ 4150 \ 4151 product_pd(bool, PreserveFramePointer, \ 4152 "Use the FP register for holding the frame pointer " \ 4153 "and not as a general purpose register.") \ 4154 \ 4155 diagnostic(bool, CheckIntrinsics, true, \ 4156 "When a class C is loaded, check that " \ 4157 "(1) all intrinsics defined by the VM for class C are present "\ 4158 "in the loaded class file and are marked with the " \ 4159 "@HotSpotIntrinsicCandidate annotation, that " \ 4160 "(2) there is an intrinsic registered for all loaded methods " \ 4161 "that are annotated with the @HotSpotIntrinsicCandidate " \ 4162 "annotation, and that " \ 4163 "(3) no orphan methods exist for class C (i.e., methods for " \ 4164 "which the VM declares an intrinsic but that are not declared "\ 4165 "in the loaded class C. " \ 4166 "Check (3) is available only in debug builds.") \ 4167 \ 4168 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 4169 "Disable backwards compatibility for compile commands.") \ 4170 \ 4171 diagnostic(bool, CompilerDirectivesPrint, false, \ 4172 "Print compiler directives on installation.") \ 4173 diagnostic(int, CompilerDirectivesLimit, 50, \ 4174 "Limit on number of compiler directives.") 4175 4176 4177/* 4178 * Macros for factoring of globals 4179 */ 4180 4181// Interface macros 4182#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4183#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4184#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4185#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4186#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4187#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4188#ifdef PRODUCT 4189#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 4190#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 4191#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 4192#else 4193#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4194#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4195#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4196#endif // PRODUCT 4197// Special LP64 flags, product only needed for now. 4198#ifdef _LP64 4199#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4200#else 4201#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4202#endif // _LP64 4203 4204// Implementation macros 4205#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4206#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4207#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4208#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4209#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4210#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4211#ifdef PRODUCT 4212#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 4213#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 4214#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 4215#else 4216#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4217#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4218#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4219#endif // PRODUCT 4220#ifdef _LP64 4221#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4222#else 4223#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4224#endif // _LP64 4225 4226// Only materialize src code for range checking when required, ignore otherwise 4227#define IGNORE_RANGE(a, b) 4228// Only materialize src code for contraint checking when required, ignore otherwise 4229#define IGNORE_CONSTRAINT(func,type) 4230 4231RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4232 DECLARE_PD_DEVELOPER_FLAG, \ 4233 DECLARE_PRODUCT_FLAG, \ 4234 DECLARE_PD_PRODUCT_FLAG, \ 4235 DECLARE_DIAGNOSTIC_FLAG, \ 4236 DECLARE_EXPERIMENTAL_FLAG, \ 4237 DECLARE_NOTPRODUCT_FLAG, \ 4238 DECLARE_MANAGEABLE_FLAG, \ 4239 DECLARE_PRODUCT_RW_FLAG, \ 4240 DECLARE_LP64_PRODUCT_FLAG, \ 4241 IGNORE_RANGE, \ 4242 IGNORE_CONSTRAINT) 4243 4244RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4245 DECLARE_PD_DEVELOPER_FLAG, \ 4246 DECLARE_PRODUCT_FLAG, \ 4247 DECLARE_PD_PRODUCT_FLAG, \ 4248 DECLARE_DIAGNOSTIC_FLAG, \ 4249 DECLARE_NOTPRODUCT_FLAG, \ 4250 IGNORE_RANGE, \ 4251 IGNORE_CONSTRAINT) 4252 4253ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4254 DECLARE_PRODUCT_FLAG, \ 4255 DECLARE_DIAGNOSTIC_FLAG, \ 4256 DECLARE_EXPERIMENTAL_FLAG, \ 4257 DECLARE_NOTPRODUCT_FLAG, \ 4258 IGNORE_RANGE, \ 4259 IGNORE_CONSTRAINT) 4260 4261// Extensions 4262 4263#include "runtime/globals_ext.hpp" 4264 4265#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4266