globals.hpp revision 9647:5b0159494355
1/* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26#define SHARE_VM_RUNTIME_GLOBALS_HPP 27 28#include <float.h> 29#include "utilities/debug.hpp" 30#include <float.h> // for DBL_MAX 31 32// use this for flags that are true per default in the tiered build 33// but false in non-tiered builds, and vice versa 34#ifdef TIERED 35#define trueInTiered true 36#define falseInTiered false 37#else 38#define trueInTiered false 39#define falseInTiered true 40#endif 41 42#ifdef TARGET_ARCH_x86 43# include "globals_x86.hpp" 44#endif 45#ifdef TARGET_ARCH_sparc 46# include "globals_sparc.hpp" 47#endif 48#ifdef TARGET_ARCH_zero 49# include "globals_zero.hpp" 50#endif 51#ifdef TARGET_ARCH_arm 52# include "globals_arm.hpp" 53#endif 54#ifdef TARGET_ARCH_ppc 55# include "globals_ppc.hpp" 56#endif 57#ifdef TARGET_ARCH_aarch64 58# include "globals_aarch64.hpp" 59#endif 60#ifdef TARGET_OS_FAMILY_linux 61# include "globals_linux.hpp" 62#endif 63#ifdef TARGET_OS_FAMILY_solaris 64# include "globals_solaris.hpp" 65#endif 66#ifdef TARGET_OS_FAMILY_windows 67# include "globals_windows.hpp" 68#endif 69#ifdef TARGET_OS_FAMILY_aix 70# include "globals_aix.hpp" 71#endif 72#ifdef TARGET_OS_FAMILY_bsd 73# include "globals_bsd.hpp" 74#endif 75#ifdef TARGET_OS_ARCH_linux_x86 76# include "globals_linux_x86.hpp" 77#endif 78#ifdef TARGET_OS_ARCH_linux_sparc 79# include "globals_linux_sparc.hpp" 80#endif 81#ifdef TARGET_OS_ARCH_linux_zero 82# include "globals_linux_zero.hpp" 83#endif 84#ifdef TARGET_OS_ARCH_solaris_x86 85# include "globals_solaris_x86.hpp" 86#endif 87#ifdef TARGET_OS_ARCH_solaris_sparc 88# include "globals_solaris_sparc.hpp" 89#endif 90#ifdef TARGET_OS_ARCH_windows_x86 91# include "globals_windows_x86.hpp" 92#endif 93#ifdef TARGET_OS_ARCH_linux_arm 94# include "globals_linux_arm.hpp" 95#endif 96#ifdef TARGET_OS_ARCH_linux_ppc 97# include "globals_linux_ppc.hpp" 98#endif 99#ifdef TARGET_OS_ARCH_linux_aarch64 100# include "globals_linux_aarch64.hpp" 101#endif 102#ifdef TARGET_OS_ARCH_aix_ppc 103# include "globals_aix_ppc.hpp" 104#endif 105#ifdef TARGET_OS_ARCH_bsd_x86 106# include "globals_bsd_x86.hpp" 107#endif 108#ifdef TARGET_OS_ARCH_bsd_zero 109# include "globals_bsd_zero.hpp" 110#endif 111#ifdef COMPILER1 112#ifdef TARGET_ARCH_x86 113# include "c1_globals_x86.hpp" 114#endif 115#ifdef TARGET_ARCH_sparc 116# include "c1_globals_sparc.hpp" 117#endif 118#ifdef TARGET_ARCH_arm 119# include "c1_globals_arm.hpp" 120#endif 121#ifdef TARGET_ARCH_aarch64 122# include "c1_globals_aarch64.hpp" 123#endif 124#ifdef TARGET_OS_FAMILY_linux 125# include "c1_globals_linux.hpp" 126#endif 127#ifdef TARGET_OS_FAMILY_solaris 128# include "c1_globals_solaris.hpp" 129#endif 130#ifdef TARGET_OS_FAMILY_windows 131# include "c1_globals_windows.hpp" 132#endif 133#ifdef TARGET_OS_FAMILY_aix 134# include "c1_globals_aix.hpp" 135#endif 136#ifdef TARGET_OS_FAMILY_bsd 137# include "c1_globals_bsd.hpp" 138#endif 139#ifdef TARGET_ARCH_ppc 140# include "c1_globals_ppc.hpp" 141#endif 142#endif 143#ifdef COMPILER2 144#ifdef TARGET_ARCH_x86 145# include "c2_globals_x86.hpp" 146#endif 147#ifdef TARGET_ARCH_sparc 148# include "c2_globals_sparc.hpp" 149#endif 150#ifdef TARGET_ARCH_arm 151# include "c2_globals_arm.hpp" 152#endif 153#ifdef TARGET_ARCH_ppc 154# include "c2_globals_ppc.hpp" 155#endif 156#ifdef TARGET_ARCH_aarch64 157# include "c2_globals_aarch64.hpp" 158#endif 159#ifdef TARGET_OS_FAMILY_linux 160# include "c2_globals_linux.hpp" 161#endif 162#ifdef TARGET_OS_FAMILY_solaris 163# include "c2_globals_solaris.hpp" 164#endif 165#ifdef TARGET_OS_FAMILY_windows 166# include "c2_globals_windows.hpp" 167#endif 168#ifdef TARGET_OS_FAMILY_aix 169# include "c2_globals_aix.hpp" 170#endif 171#ifdef TARGET_OS_FAMILY_bsd 172# include "c2_globals_bsd.hpp" 173#endif 174#endif 175#ifdef SHARK 176#ifdef TARGET_ARCH_zero 177# include "shark_globals_zero.hpp" 178#endif 179#endif 180 181#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) && !INCLUDE_JVMCI 182define_pd_global(bool, BackgroundCompilation, false); 183define_pd_global(bool, UseTLAB, false); 184define_pd_global(bool, CICompileOSR, false); 185define_pd_global(bool, UseTypeProfile, false); 186define_pd_global(bool, UseOnStackReplacement, false); 187define_pd_global(bool, InlineIntrinsics, false); 188define_pd_global(bool, PreferInterpreterNativeStubs, true); 189define_pd_global(bool, ProfileInterpreter, false); 190define_pd_global(bool, ProfileTraps, false); 191define_pd_global(bool, TieredCompilation, false); 192 193define_pd_global(intx, CompileThreshold, 0); 194 195define_pd_global(intx, OnStackReplacePercentage, 0); 196define_pd_global(bool, ResizeTLAB, false); 197define_pd_global(intx, FreqInlineSize, 0); 198define_pd_global(size_t, NewSizeThreadIncrease, 4*K); 199define_pd_global(intx, InlineClassNatives, true); 200define_pd_global(intx, InlineUnsafeOps, true); 201define_pd_global(intx, InitialCodeCacheSize, 160*K); 202define_pd_global(intx, ReservedCodeCacheSize, 32*M); 203define_pd_global(intx, NonProfiledCodeHeapSize, 0); 204define_pd_global(intx, ProfiledCodeHeapSize, 0); 205define_pd_global(intx, NonNMethodCodeHeapSize, 32*M); 206 207define_pd_global(intx, CodeCacheExpansionSize, 32*K); 208define_pd_global(intx, CodeCacheMinBlockLength, 1); 209define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 210define_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 211define_pd_global(bool, NeverActAsServerClassMachine, true); 212define_pd_global(uint64_t,MaxRAM, 1ULL*G); 213#define CI_COMPILER_COUNT 0 214#else 215 216#if defined(COMPILER2) || INCLUDE_JVMCI 217#define CI_COMPILER_COUNT 2 218#else 219#define CI_COMPILER_COUNT 1 220#endif // COMPILER2 || INCLUDE_JVMCI 221 222#endif // no compilers 223 224// string type aliases used only in this file 225typedef const char* ccstr; 226typedef const char* ccstrlist; // represents string arguments which accumulate 227 228struct Flag { 229 enum Flags { 230 // value origin 231 DEFAULT = 0, 232 COMMAND_LINE = 1, 233 ENVIRON_VAR = 2, 234 CONFIG_FILE = 3, 235 MANAGEMENT = 4, 236 ERGONOMIC = 5, 237 ATTACH_ON_DEMAND = 6, 238 INTERNAL = 7, 239 240 LAST_VALUE_ORIGIN = INTERNAL, 241 VALUE_ORIGIN_BITS = 4, 242 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS), 243 244 // flag kind 245 KIND_PRODUCT = 1 << 4, 246 KIND_MANAGEABLE = 1 << 5, 247 KIND_DIAGNOSTIC = 1 << 6, 248 KIND_EXPERIMENTAL = 1 << 7, 249 KIND_NOT_PRODUCT = 1 << 8, 250 KIND_DEVELOP = 1 << 9, 251 KIND_PLATFORM_DEPENDENT = 1 << 10, 252 KIND_READ_WRITE = 1 << 11, 253 KIND_C1 = 1 << 12, 254 KIND_C2 = 1 << 13, 255 KIND_ARCH = 1 << 14, 256 KIND_SHARK = 1 << 15, 257 KIND_LP64_PRODUCT = 1 << 16, 258 KIND_COMMERCIAL = 1 << 17, 259 KIND_JVMCI = 1 << 18, 260 261 KIND_MASK = ~VALUE_ORIGIN_MASK 262 }; 263 264 enum Error { 265 // no error 266 SUCCESS = 0, 267 // flag name is missing 268 MISSING_NAME, 269 // flag value is missing 270 MISSING_VALUE, 271 // error parsing the textual form of the value 272 WRONG_FORMAT, 273 // flag is not writeable 274 NON_WRITABLE, 275 // flag value is outside of its bounds 276 OUT_OF_BOUNDS, 277 // flag value violates its constraint 278 VIOLATES_CONSTRAINT, 279 // there is no flag with the given name 280 INVALID_FLAG, 281 // other, unspecified error related to setting the flag 282 ERR_OTHER 283 }; 284 285 enum MsgType { 286 NONE = 0, 287 DIAGNOSTIC_FLAG_BUT_LOCKED, 288 EXPERIMENTAL_FLAG_BUT_LOCKED, 289 DEVELOPER_FLAG_BUT_PRODUCT_BUILD, 290 NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD 291 }; 292 293 const char* _type; 294 const char* _name; 295 void* _addr; 296 NOT_PRODUCT(const char* _doc;) 297 Flags _flags; 298 299 // points to all Flags static array 300 static Flag* flags; 301 302 // number of flags 303 static size_t numFlags; 304 305 static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); }; 306 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false); 307 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 308 309 void check_writable(); 310 311 bool is_bool() const; 312 bool get_bool() const; 313 void set_bool(bool value); 314 315 bool is_int() const; 316 int get_int() const; 317 void set_int(int value); 318 319 bool is_uint() const; 320 uint get_uint() const; 321 void set_uint(uint value); 322 323 bool is_intx() const; 324 intx get_intx() const; 325 void set_intx(intx value); 326 327 bool is_uintx() const; 328 uintx get_uintx() const; 329 void set_uintx(uintx value); 330 331 bool is_uint64_t() const; 332 uint64_t get_uint64_t() const; 333 void set_uint64_t(uint64_t value); 334 335 bool is_size_t() const; 336 size_t get_size_t() const; 337 void set_size_t(size_t value); 338 339 bool is_double() const; 340 double get_double() const; 341 void set_double(double value); 342 343 bool is_ccstr() const; 344 bool ccstr_accumulates() const; 345 ccstr get_ccstr() const; 346 void set_ccstr(ccstr value); 347 348 Flags get_origin(); 349 void set_origin(Flags origin); 350 351 bool is_default(); 352 bool is_ergonomic(); 353 bool is_command_line(); 354 355 bool is_product() const; 356 bool is_manageable() const; 357 bool is_diagnostic() const; 358 bool is_experimental() const; 359 bool is_notproduct() const; 360 bool is_develop() const; 361 bool is_read_write() const; 362 bool is_commercial() const; 363 364 bool is_constant_in_binary() const; 365 366 bool is_unlocker() const; 367 bool is_unlocked() const; 368 bool is_writeable() const; 369 bool is_external() const; 370 371 bool is_unlocker_ext() const; 372 bool is_unlocked_ext() const; 373 bool is_writeable_ext() const; 374 bool is_external_ext() const; 375 376 void unlock_diagnostic(); 377 378 Flag::MsgType get_locked_message(char*, int) const; 379 void get_locked_message_ext(char*, int) const; 380 381 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 382 void print_on(outputStream* st, bool withComments = false, bool printRanges = false); 383 void print_kind(outputStream* st); 384 void print_as_flag(outputStream* st); 385 386 static const char* flag_error_str(Flag::Error error); 387}; 388 389// debug flags control various aspects of the VM and are global accessible 390 391// use FlagSetting to temporarily change some debug flag 392// e.g. FlagSetting fs(DebugThisAndThat, true); 393// restored to previous value upon leaving scope 394class FlagSetting { 395 bool val; 396 bool* flag; 397 public: 398 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 399 ~FlagSetting() { *flag = val; } 400}; 401 402 403class CounterSetting { 404 intx* counter; 405 public: 406 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 407 ~CounterSetting() { (*counter)--; } 408}; 409 410class IntFlagSetting { 411 int val; 412 int* flag; 413 public: 414 IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; } 415 ~IntFlagSetting() { *flag = val; } 416}; 417 418class UIntFlagSetting { 419 uint val; 420 uint* flag; 421 public: 422 UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; } 423 ~UIntFlagSetting() { *flag = val; } 424}; 425 426class UIntXFlagSetting { 427 uintx val; 428 uintx* flag; 429 public: 430 UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 431 ~UIntXFlagSetting() { *flag = val; } 432}; 433 434class DoubleFlagSetting { 435 double val; 436 double* flag; 437 public: 438 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 439 ~DoubleFlagSetting() { *flag = val; } 440}; 441 442class SizeTFlagSetting { 443 size_t val; 444 size_t* flag; 445 public: 446 SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; } 447 ~SizeTFlagSetting() { *flag = val; } 448}; 449 450 451class CommandLineFlags { 452public: 453 static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false); 454 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); } 455 static Flag::Error boolAtPut(Flag* flag, bool* value, Flag::Flags origin); 456 static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin); 457 static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 458 459 static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false); 460 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); } 461 static Flag::Error intAtPut(Flag* flag, int* value, Flag::Flags origin); 462 static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin); 463 static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); } 464 465 static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false); 466 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); } 467 static Flag::Error uintAtPut(Flag* flag, uint* value, Flag::Flags origin); 468 static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin); 469 static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); } 470 471 static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false); 472 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); } 473 static Flag::Error intxAtPut(Flag* flag, intx* value, Flag::Flags origin); 474 static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin); 475 static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 476 477 static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false); 478 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); } 479 static Flag::Error uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin); 480 static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin); 481 static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 482 483 static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false); 484 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); } 485 static Flag::Error size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin); 486 static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin); 487 static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); } 488 489 static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false); 490 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); } 491 static Flag::Error uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin); 492 static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin); 493 static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 494 495 static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false); 496 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); } 497 static Flag::Error doubleAtPut(Flag* flag, double* value, Flag::Flags origin); 498 static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin); 499 static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 500 501 static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false); 502 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); } 503 // Contract: Flag will make private copy of the incoming value. 504 // Outgoing value is always malloc-ed, and caller MUST call free. 505 static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin); 506 static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 507 508 // Returns false if name is not a command line flag. 509 static bool wasSetOnCmdline(const char* name, bool* value); 510 static void printSetFlags(outputStream* out); 511 512 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 513 static void printFlags(outputStream* out, bool withComments, bool printRanges = false); 514 515 static void verify() PRODUCT_RETURN; 516}; 517 518// use this for flags that are true by default in the debug version but 519// false in the optimized version, and vice versa 520#ifdef ASSERT 521#define trueInDebug true 522#define falseInDebug false 523#else 524#define trueInDebug false 525#define falseInDebug true 526#endif 527 528// use this for flags that are true per default in the product build 529// but false in development builds, and vice versa 530#ifdef PRODUCT 531#define trueInProduct true 532#define falseInProduct false 533#else 534#define trueInProduct false 535#define falseInProduct true 536#endif 537 538#ifdef JAVASE_EMBEDDED 539#define falseInEmbedded false 540#else 541#define falseInEmbedded true 542#endif 543 544// develop flags are settable / visible only during development and are constant in the PRODUCT version 545// product flags are always settable / visible 546// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 547 548// A flag must be declared with one of the following types: 549// bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 550// The type "ccstr" is an alias for "const char*" and is used 551// only in this file, because the macrology requires single-token type names. 552 553// Note: Diagnostic options not meant for VM tuning or for product modes. 554// They are to be used for VM quality assurance or field diagnosis 555// of VM bugs. They are hidden so that users will not be encouraged to 556// try them as if they were VM ordinary execution options. However, they 557// are available in the product version of the VM. Under instruction 558// from support engineers, VM customers can turn them on to collect 559// diagnostic information about VM problems. To use a VM diagnostic 560// option, you must first specify +UnlockDiagnosticVMOptions. 561// (This master switch also affects the behavior of -Xprintflags.) 562// 563// experimental flags are in support of features that are not 564// part of the officially supported product, but are available 565// for experimenting with. They could, for example, be performance 566// features that may not have undergone full or rigorous QA, but which may 567// help performance in some cases and released for experimentation 568// by the community of users and developers. This flag also allows one to 569// be able to build a fully supported product that nonetheless also 570// ships with some unsupported, lightly tested, experimental features. 571// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 572// UnlockExperimentalVMOptions flag, which allows the control and 573// modification of the experimental flags. 574// 575// Nota bene: neither diagnostic nor experimental options should be used casually, 576// and they are not supported on production loads, except under explicit 577// direction from support engineers. 578// 579// manageable flags are writeable external product flags. 580// They are dynamically writeable through the JDK management interface 581// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 582// These flags are external exported interface (see CCC). The list of 583// manageable flags can be queried programmatically through the management 584// interface. 585// 586// A flag can be made as "manageable" only if 587// - the flag is defined in a CCC as an external exported interface. 588// - the VM implementation supports dynamic setting of the flag. 589// This implies that the VM must *always* query the flag variable 590// and not reuse state related to the flag state at any given time. 591// - you want the flag to be queried programmatically by the customers. 592// 593// product_rw flags are writeable internal product flags. 594// They are like "manageable" flags but for internal/private use. 595// The list of product_rw flags are internal/private flags which 596// may be changed/removed in a future release. It can be set 597// through the management interface to get/set value 598// when the name of flag is supplied. 599// 600// A flag can be made as "product_rw" only if 601// - the VM implementation supports dynamic setting of the flag. 602// This implies that the VM must *always* query the flag variable 603// and not reuse state related to the flag state at any given time. 604// 605// Note that when there is a need to support develop flags to be writeable, 606// it can be done in the same way as product_rw. 607// 608// range is a macro that will expand to min and max arguments for range 609// checking code if provided - see commandLineFlagRangeList.hpp 610// 611// constraint is a macro that will expand to custom function call 612// for constraint checking if provided - see commandLineFlagConstraintList.hpp 613// 614 615#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product, range, constraint) \ 616 \ 617 lp64_product(bool, UseCompressedOops, false, \ 618 "Use 32-bit object references in 64-bit VM. " \ 619 "lp64_product means flag is always constant in 32 bit VM") \ 620 \ 621 lp64_product(bool, UseCompressedClassPointers, false, \ 622 "Use 32-bit class pointers in 64-bit VM. " \ 623 "lp64_product means flag is always constant in 32 bit VM") \ 624 \ 625 notproduct(bool, CheckCompressedOops, true, \ 626 "Generate checks in encoding/decoding code in debug VM") \ 627 \ 628 product_pd(size_t, HeapBaseMinAddress, \ 629 "OS specific low limit for heap base address") \ 630 \ 631 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 632 "Heap allocation steps through preferred address regions to find" \ 633 " where it can allocate the heap. Number of steps to take per " \ 634 "region.") \ 635 range(1, max_uintx) \ 636 \ 637 diagnostic(bool, PrintCompressedOopsMode, false, \ 638 "Print compressed oops base address and encoding mode") \ 639 \ 640 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 641 "Default object alignment in bytes, 8 is minimum") \ 642 range(8, 256) \ 643 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 644 \ 645 product(bool, AssumeMP, false, \ 646 "Instruct the VM to assume multiple processors are available") \ 647 \ 648 /* UseMembar is theoretically a temp flag used for memory barrier */ \ 649 /* removal testing. It was supposed to be removed before FCS but has */ \ 650 /* been re-added (see 6401008) */ \ 651 product_pd(bool, UseMembar, \ 652 "(Unstable) Issues membars on thread state transitions") \ 653 \ 654 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 655 "Clean the chunk pool asynchronously") \ 656 \ 657 experimental(bool, AlwaysSafeConstructors, false, \ 658 "Force safe construction, as if all fields are final.") \ 659 \ 660 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 661 "Enable normal processing of flags relating to field diagnostics")\ 662 \ 663 experimental(bool, UnlockExperimentalVMOptions, false, \ 664 "Enable normal processing of flags relating to experimental " \ 665 "features") \ 666 \ 667 product(bool, JavaMonitorsInStackTrace, true, \ 668 "Print information about Java monitor locks when the stacks are" \ 669 "dumped") \ 670 \ 671 product_pd(bool, UseLargePages, \ 672 "Use large page memory") \ 673 \ 674 product_pd(bool, UseLargePagesIndividualAllocation, \ 675 "Allocate large pages individually for better affinity") \ 676 \ 677 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 678 "Fail large pages individual allocation") \ 679 \ 680 product(bool, UseLargePagesInMetaspace, false, \ 681 "Use large page memory in metaspace. " \ 682 "Only used if UseLargePages is enabled.") \ 683 \ 684 develop(bool, TracePageSizes, false, \ 685 "Trace page size selection and usage") \ 686 \ 687 product(bool, UseNUMA, false, \ 688 "Use NUMA if available") \ 689 \ 690 product(bool, UseNUMAInterleaving, false, \ 691 "Interleave memory across NUMA nodes if available") \ 692 \ 693 product(size_t, NUMAInterleaveGranularity, 2*M, \ 694 "Granularity to use for NUMA interleaving on Windows OS") \ 695 \ 696 product(bool, ForceNUMA, false, \ 697 "Force NUMA optimizations on single-node/UMA systems") \ 698 \ 699 product(uintx, NUMAChunkResizeWeight, 20, \ 700 "Percentage (0-100) used to weight the current sample when " \ 701 "computing exponentially decaying average for " \ 702 "AdaptiveNUMAChunkSizing") \ 703 range(0, 100) \ 704 \ 705 product(size_t, NUMASpaceResizeRate, 1*G, \ 706 "Do not reallocate more than this amount per collection") \ 707 \ 708 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 709 "Enable adaptive chunk sizing for NUMA") \ 710 \ 711 product(bool, NUMAStats, false, \ 712 "Print NUMA stats in detailed heap information") \ 713 \ 714 product(uintx, NUMAPageScanRate, 256, \ 715 "Maximum number of pages to include in the page scan procedure") \ 716 \ 717 product_pd(bool, NeedsDeoptSuspend, \ 718 "True for register window machines (sparc/ia64)") \ 719 \ 720 product(intx, UseSSE, 99, \ 721 "Highest supported SSE instructions set on x86/x64") \ 722 range(0, 99) \ 723 \ 724 product(bool, UseAES, false, \ 725 "Control whether AES instructions can be used on x86/x64") \ 726 \ 727 product(bool, UseSHA, false, \ 728 "Control whether SHA instructions can be used " \ 729 "on SPARC and on ARM") \ 730 \ 731 product(bool, UseGHASHIntrinsics, false, \ 732 "Use intrinsics for GHASH versions of crypto") \ 733 \ 734 product(size_t, LargePageSizeInBytes, 0, \ 735 "Large page size (0 to let VM choose the page size)") \ 736 \ 737 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 738 "Use large pages if maximum heap is at least this big") \ 739 \ 740 product(bool, ForceTimeHighResolution, false, \ 741 "Using high time resolution (for Win32 only)") \ 742 \ 743 develop(bool, TraceItables, false, \ 744 "Trace initialization and use of itables") \ 745 \ 746 develop(bool, TracePcPatching, false, \ 747 "Trace usage of frame::patch_pc") \ 748 \ 749 develop(bool, TraceJumps, false, \ 750 "Trace assembly jumps in thread ring buffer") \ 751 \ 752 develop(bool, TraceRelocator, false, \ 753 "Trace the bytecode relocator") \ 754 \ 755 develop(bool, TraceLongCompiles, false, \ 756 "Print out every time compilation is longer than " \ 757 "a given threshold") \ 758 \ 759 develop(bool, SafepointALot, false, \ 760 "Generate a lot of safepoints. This works with " \ 761 "GuaranteedSafepointInterval") \ 762 \ 763 product_pd(bool, BackgroundCompilation, \ 764 "A thread requesting compilation is not blocked during " \ 765 "compilation") \ 766 \ 767 product(bool, PrintVMQWaitTime, false, \ 768 "Print out the waiting time in VM operation queue") \ 769 \ 770 develop(bool, TraceOopMapGeneration, false, \ 771 "Show OopMapGeneration") \ 772 \ 773 product(bool, MethodFlushing, true, \ 774 "Reclamation of zombie and not-entrant methods") \ 775 \ 776 develop(bool, VerifyStack, false, \ 777 "Verify stack of each thread when it is entering a runtime call") \ 778 \ 779 diagnostic(bool, ForceUnreachable, false, \ 780 "Make all non code cache addresses to be unreachable by " \ 781 "forcing use of 64bit literal fixups") \ 782 \ 783 notproduct(bool, StressDerivedPointers, false, \ 784 "Force scavenge when a derived pointer is detected on stack " \ 785 "after rtm call") \ 786 \ 787 develop(bool, TraceDerivedPointers, false, \ 788 "Trace traversal of derived pointers on stack") \ 789 \ 790 notproduct(bool, TraceCodeBlobStacks, false, \ 791 "Trace stack-walk of codeblobs") \ 792 \ 793 product(bool, PrintJNIResolving, false, \ 794 "Used to implement -v:jni") \ 795 \ 796 notproduct(bool, PrintRewrites, false, \ 797 "Print methods that are being rewritten") \ 798 \ 799 product(bool, UseInlineCaches, true, \ 800 "Use Inline Caches for virtual calls ") \ 801 \ 802 develop(bool, InlineArrayCopy, true, \ 803 "Inline arraycopy native that is known to be part of " \ 804 "base library DLL") \ 805 \ 806 develop(bool, InlineObjectHash, true, \ 807 "Inline Object::hashCode() native that is known to be part " \ 808 "of base library DLL") \ 809 \ 810 develop(bool, InlineNatives, true, \ 811 "Inline natives that are known to be part of base library DLL") \ 812 \ 813 develop(bool, InlineMathNatives, true, \ 814 "Inline SinD, CosD, etc.") \ 815 \ 816 develop(bool, InlineClassNatives, true, \ 817 "Inline Class.isInstance, etc") \ 818 \ 819 develop(bool, InlineThreadNatives, true, \ 820 "Inline Thread.currentThread, etc") \ 821 \ 822 develop(bool, InlineUnsafeOps, true, \ 823 "Inline memory ops (native methods) from Unsafe") \ 824 \ 825 product(bool, CriticalJNINatives, true, \ 826 "Check for critical JNI entry points") \ 827 \ 828 notproduct(bool, StressCriticalJNINatives, false, \ 829 "Exercise register saving code in critical natives") \ 830 \ 831 product(bool, UseSSE42Intrinsics, false, \ 832 "SSE4.2 versions of intrinsics") \ 833 \ 834 product(bool, UseAESIntrinsics, false, \ 835 "Use intrinsics for AES versions of crypto") \ 836 \ 837 product(bool, UseSHA1Intrinsics, false, \ 838 "Use intrinsics for SHA-1 crypto hash function. " \ 839 "Requires that UseSHA is enabled.") \ 840 \ 841 product(bool, UseSHA256Intrinsics, false, \ 842 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 843 "Requires that UseSHA is enabled.") \ 844 \ 845 product(bool, UseSHA512Intrinsics, false, \ 846 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 847 "Requires that UseSHA is enabled.") \ 848 \ 849 product(bool, UseCRC32Intrinsics, false, \ 850 "use intrinsics for java.util.zip.CRC32") \ 851 \ 852 product(bool, UseCRC32CIntrinsics, false, \ 853 "use intrinsics for java.util.zip.CRC32C") \ 854 \ 855 product(bool, UseAdler32Intrinsics, false, \ 856 "use intrinsics for java.util.zip.Adler32") \ 857 \ 858 diagnostic(ccstrlist, DisableIntrinsic, "", \ 859 "do not expand intrinsics whose (internal) names appear here") \ 860 \ 861 develop(bool, TraceCallFixup, false, \ 862 "Trace all call fixups") \ 863 \ 864 develop(bool, DeoptimizeALot, false, \ 865 "Deoptimize at every exit from the runtime system") \ 866 \ 867 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 868 "A comma separated list of bcis to deoptimize at") \ 869 \ 870 product(bool, DeoptimizeRandom, false, \ 871 "Deoptimize random frames on random exit from the runtime system")\ 872 \ 873 notproduct(bool, ZombieALot, false, \ 874 "Create zombies (non-entrant) at exit from the runtime system") \ 875 \ 876 product(bool, UnlinkSymbolsALot, false, \ 877 "Unlink unreferenced symbols from the symbol table at safepoints")\ 878 \ 879 notproduct(bool, WalkStackALot, false, \ 880 "Trace stack (no print) at every exit from the runtime system") \ 881 \ 882 product(bool, Debugging, false, \ 883 "Set when executing debug methods in debug.cpp " \ 884 "(to prevent triggering assertions)") \ 885 \ 886 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 887 "Enable strict checks that safepoints cannot happen for threads " \ 888 "that use No_Safepoint_Verifier") \ 889 \ 890 notproduct(bool, VerifyLastFrame, false, \ 891 "Verify oops on last frame on entry to VM") \ 892 \ 893 develop(bool, TraceHandleAllocation, false, \ 894 "Print out warnings when suspiciously many handles are allocated")\ 895 \ 896 product(bool, FailOverToOldVerifier, true, \ 897 "Fail over to old verifier when split verifier fails") \ 898 \ 899 develop(bool, ShowSafepointMsgs, false, \ 900 "Show message about safepoint synchronization") \ 901 \ 902 product(bool, SafepointTimeout, false, \ 903 "Time out and warn or fail after SafepointTimeoutDelay " \ 904 "milliseconds if failed to reach safepoint") \ 905 \ 906 develop(bool, DieOnSafepointTimeout, false, \ 907 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 908 \ 909 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 910 /* typically, at most a few retries are needed */ \ 911 product(intx, SuspendRetryCount, 50, \ 912 "Maximum retry count for an external suspend request") \ 913 range(0, max_intx) \ 914 \ 915 product(intx, SuspendRetryDelay, 5, \ 916 "Milliseconds to delay per retry (* current_retry_count)") \ 917 range(0, max_intx) \ 918 \ 919 product(bool, AssertOnSuspendWaitFailure, false, \ 920 "Assert/Guarantee on external suspend wait failure") \ 921 \ 922 product(bool, TraceSuspendWaitFailures, false, \ 923 "Trace external suspend wait failures") \ 924 \ 925 product(bool, MaxFDLimit, true, \ 926 "Bump the number of file descriptors to maximum in Solaris") \ 927 \ 928 diagnostic(bool, LogEvents, true, \ 929 "Enable the various ring buffer event logs") \ 930 \ 931 diagnostic(uintx, LogEventsBufferEntries, 10, \ 932 "Number of ring buffer event logs") \ 933 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 934 \ 935 product(bool, BytecodeVerificationRemote, true, \ 936 "Enable the Java bytecode verifier for remote classes") \ 937 \ 938 product(bool, BytecodeVerificationLocal, false, \ 939 "Enable the Java bytecode verifier for local classes") \ 940 \ 941 develop(bool, ForceFloatExceptions, trueInDebug, \ 942 "Force exceptions on FP stack under/overflow") \ 943 \ 944 develop(bool, VerifyStackAtCalls, false, \ 945 "Verify that the stack pointer is unchanged after calls") \ 946 \ 947 develop(bool, TraceJavaAssertions, false, \ 948 "Trace java language assertions") \ 949 \ 950 notproduct(bool, CheckAssertionStatusDirectives, false, \ 951 "Temporary - see javaClasses.cpp") \ 952 \ 953 notproduct(bool, PrintMallocFree, false, \ 954 "Trace calls to C heap malloc/free allocation") \ 955 \ 956 product(bool, PrintOopAddress, false, \ 957 "Always print the location of the oop") \ 958 \ 959 notproduct(bool, VerifyCodeCache, false, \ 960 "Verify code cache on memory allocation/deallocation") \ 961 \ 962 develop(bool, UseMallocOnly, false, \ 963 "Use only malloc/free for allocation (no resource area/arena)") \ 964 \ 965 develop(bool, PrintMalloc, false, \ 966 "Print all malloc/free calls") \ 967 \ 968 develop(bool, PrintMallocStatistics, false, \ 969 "Print malloc/free statistics") \ 970 \ 971 develop(bool, ZapResourceArea, trueInDebug, \ 972 "Zap freed resource/arena space with 0xABABABAB") \ 973 \ 974 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 975 "Zap freed VM handle space with 0xBCBCBCBC") \ 976 \ 977 develop(bool, ZapJNIHandleArea, trueInDebug, \ 978 "Zap freed JNI handle space with 0xFEFEFEFE") \ 979 \ 980 notproduct(bool, ZapStackSegments, trueInDebug, \ 981 "Zap allocated/freed stack segments with 0xFADFADED") \ 982 \ 983 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 984 "Zap unused heap space with 0xBAADBABE") \ 985 \ 986 develop(bool, TraceZapUnusedHeapArea, false, \ 987 "Trace zapping of unused heap space") \ 988 \ 989 develop(bool, CheckZapUnusedHeapArea, false, \ 990 "Check zapping of unused heap space") \ 991 \ 992 develop(bool, ZapFillerObjects, trueInDebug, \ 993 "Zap filler objects with 0xDEAFBABE") \ 994 \ 995 develop(bool, PrintVMMessages, true, \ 996 "Print VM messages on console") \ 997 \ 998 product(bool, PrintGCApplicationConcurrentTime, false, \ 999 "Print the time the application has been running") \ 1000 \ 1001 product(bool, PrintGCApplicationStoppedTime, false, \ 1002 "Print the time the application has been stopped") \ 1003 \ 1004 diagnostic(bool, VerboseVerification, false, \ 1005 "Display detailed verification details") \ 1006 \ 1007 notproduct(uintx, ErrorHandlerTest, 0, \ 1008 "If > 0, provokes an error after VM initialization; the value " \ 1009 "determines which error to provoke. See test_error_handler() " \ 1010 "in debug.cpp.") \ 1011 \ 1012 notproduct(uintx, TestCrashInErrorHandler, 0, \ 1013 "If > 0, provokes an error inside VM error handler (a secondary " \ 1014 "crash). see test_error_handler() in debug.cpp.") \ 1015 \ 1016 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 1017 "If true, tests SafeFetch inside error handler.") \ 1018 \ 1019 develop(bool, Verbose, false, \ 1020 "Print additional debugging information from other modes") \ 1021 \ 1022 develop(bool, PrintMiscellaneous, false, \ 1023 "Print uncategorized debugging information (requires +Verbose)") \ 1024 \ 1025 develop(bool, WizardMode, false, \ 1026 "Print much more debugging information") \ 1027 \ 1028 product(bool, ShowMessageBoxOnError, false, \ 1029 "Keep process alive on VM fatal error") \ 1030 \ 1031 product(bool, CreateCoredumpOnCrash, true, \ 1032 "Create core/mini dump on VM fatal error") \ 1033 \ 1034 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 1035 "Timeout, in seconds, to limit the time spent on writing an " \ 1036 "error log in case of a crash.") \ 1037 range(0, (uint64_t)max_jlong/1000) \ 1038 \ 1039 product_pd(bool, UseOSErrorReporting, \ 1040 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 1041 \ 1042 product(bool, SuppressFatalErrorMessage, false, \ 1043 "Report NO fatal error message (avoid deadlock)") \ 1044 \ 1045 product(ccstrlist, OnError, "", \ 1046 "Run user-defined commands on fatal error; see VMError.cpp " \ 1047 "for examples") \ 1048 \ 1049 product(ccstrlist, OnOutOfMemoryError, "", \ 1050 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 1051 \ 1052 manageable(bool, HeapDumpBeforeFullGC, false, \ 1053 "Dump heap to file before any major stop-the-world GC") \ 1054 \ 1055 manageable(bool, HeapDumpAfterFullGC, false, \ 1056 "Dump heap to file after any major stop-the-world GC") \ 1057 \ 1058 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 1059 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 1060 \ 1061 manageable(ccstr, HeapDumpPath, NULL, \ 1062 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 1063 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 1064 "in the working directory)") \ 1065 \ 1066 develop(size_t, SegmentedHeapDumpThreshold, 2*G, \ 1067 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 1068 "when the heap usage is larger than this") \ 1069 \ 1070 develop(size_t, HeapDumpSegmentSize, 1*G, \ 1071 "Approximate segment size when generating a segmented heap dump") \ 1072 \ 1073 develop(bool, BreakAtWarning, false, \ 1074 "Execute breakpoint upon encountering VM warning") \ 1075 \ 1076 develop(bool, UseFakeTimers, false, \ 1077 "Tell whether the VM should use system time or a fake timer") \ 1078 \ 1079 product(ccstr, NativeMemoryTracking, "off", \ 1080 "Native memory tracking options") \ 1081 \ 1082 diagnostic(bool, PrintNMTStatistics, false, \ 1083 "Print native memory tracking summary data if it is on") \ 1084 \ 1085 diagnostic(bool, LogCompilation, false, \ 1086 "Log compilation activity in detail to LogFile") \ 1087 \ 1088 product(bool, PrintCompilation, false, \ 1089 "Print compilations") \ 1090 \ 1091 diagnostic(bool, TraceNMethodInstalls, false, \ 1092 "Trace nmethod installation") \ 1093 \ 1094 diagnostic(intx, ScavengeRootsInCode, 2, \ 1095 "0: do not allow scavengable oops in the code cache; " \ 1096 "1: allow scavenging from the code cache; " \ 1097 "2: emit as many constants as the compiler can see") \ 1098 range(0, 2) \ 1099 \ 1100 product(bool, AlwaysRestoreFPU, false, \ 1101 "Restore the FPU control word after every JNI call (expensive)") \ 1102 \ 1103 diagnostic(bool, PrintCompilation2, false, \ 1104 "Print additional statistics per compilation") \ 1105 \ 1106 diagnostic(bool, PrintAdapterHandlers, false, \ 1107 "Print code generated for i2c/c2i adapters") \ 1108 \ 1109 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 1110 "Verify that i2c/c2i adapters are called properly") \ 1111 \ 1112 develop(bool, VerifyAdapterSharing, false, \ 1113 "Verify that the code for shared adapters is the equivalent") \ 1114 \ 1115 diagnostic(bool, PrintAssembly, false, \ 1116 "Print assembly code (using external disassembler.so)") \ 1117 \ 1118 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 1119 "Print options string passed to disassembler.so") \ 1120 \ 1121 notproduct(bool, PrintNMethodStatistics, false, \ 1122 "Print a summary statistic for the generated nmethods") \ 1123 \ 1124 diagnostic(bool, PrintNMethods, false, \ 1125 "Print assembly code for nmethods when generated") \ 1126 \ 1127 diagnostic(bool, PrintNativeNMethods, false, \ 1128 "Print assembly code for native nmethods when generated") \ 1129 \ 1130 develop(bool, PrintDebugInfo, false, \ 1131 "Print debug information for all nmethods when generated") \ 1132 \ 1133 develop(bool, PrintRelocations, false, \ 1134 "Print relocation information for all nmethods when generated") \ 1135 \ 1136 develop(bool, PrintDependencies, false, \ 1137 "Print dependency information for all nmethods when generated") \ 1138 \ 1139 develop(bool, PrintExceptionHandlers, false, \ 1140 "Print exception handler tables for all nmethods when generated") \ 1141 \ 1142 develop(bool, StressCompiledExceptionHandlers, false, \ 1143 "Exercise compiled exception handlers") \ 1144 \ 1145 develop(bool, InterceptOSException, false, \ 1146 "Start debugger when an implicit OS (e.g. NULL) " \ 1147 "exception happens") \ 1148 \ 1149 product(bool, PrintCodeCache, false, \ 1150 "Print the code cache memory usage when exiting") \ 1151 \ 1152 develop(bool, PrintCodeCache2, false, \ 1153 "Print detailed usage information on the code cache when exiting")\ 1154 \ 1155 product(bool, PrintCodeCacheOnCompilation, false, \ 1156 "Print the code cache memory usage each time a method is " \ 1157 "compiled") \ 1158 \ 1159 diagnostic(bool, PrintStubCode, false, \ 1160 "Print generated stub code") \ 1161 \ 1162 product(bool, StackTraceInThrowable, true, \ 1163 "Collect backtrace in throwable when exception happens") \ 1164 \ 1165 product(bool, OmitStackTraceInFastThrow, true, \ 1166 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1167 \ 1168 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1169 "Print bytecode statistics when dumping profiler output") \ 1170 \ 1171 product(bool, ProfilerRecordPC, false, \ 1172 "Collect ticks for each 16 byte interval of compiled code") \ 1173 \ 1174 product(bool, ProfileVM, false, \ 1175 "Profile ticks that fall within VM (either in the VM Thread " \ 1176 "or VM code called through stubs)") \ 1177 \ 1178 product(bool, ProfileIntervals, false, \ 1179 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1180 \ 1181 notproduct(bool, ProfilerCheckIntervals, false, \ 1182 "Collect and print information on spacing of profiler ticks") \ 1183 \ 1184 product(bool, PrintWarnings, true, \ 1185 "Print JVM warnings to output stream") \ 1186 \ 1187 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1188 "Print warnings for stalled SpinLocks") \ 1189 \ 1190 product(bool, RegisterFinalizersAtInit, true, \ 1191 "Register finalizable objects at end of Object.<init> or " \ 1192 "after allocation") \ 1193 \ 1194 develop(bool, RegisterReferences, true, \ 1195 "Tell whether the VM should register soft/weak/final/phantom " \ 1196 "references") \ 1197 \ 1198 develop(bool, IgnoreRewrites, false, \ 1199 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1200 "This is unsafe!") \ 1201 \ 1202 develop(bool, PrintCodeCacheExtension, false, \ 1203 "Print extension of code cache") \ 1204 \ 1205 develop(bool, UsePrivilegedStack, true, \ 1206 "Enable the security JVM functions") \ 1207 \ 1208 develop(bool, ProtectionDomainVerification, true, \ 1209 "Verify protection domain before resolution in system dictionary")\ 1210 \ 1211 product(bool, ClassUnloading, true, \ 1212 "Do unloading of classes") \ 1213 \ 1214 product(bool, ClassUnloadingWithConcurrentMark, true, \ 1215 "Do unloading of classes with a concurrent marking cycle") \ 1216 \ 1217 develop(bool, DisableStartThread, false, \ 1218 "Disable starting of additional Java threads " \ 1219 "(for debugging only)") \ 1220 \ 1221 develop(bool, MemProfiling, false, \ 1222 "Write memory usage profiling to log file") \ 1223 \ 1224 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1225 "Print the system dictionary at exit") \ 1226 \ 1227 experimental(intx, PredictedLoadedClassCount, 0, \ 1228 "Experimental: Tune loaded class cache starting size") \ 1229 \ 1230 diagnostic(bool, UnsyncloadClass, false, \ 1231 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1232 "class loader must call VM synchronized for findClass " \ 1233 "and defineClass.") \ 1234 \ 1235 product(bool, AlwaysLockClassLoader, false, \ 1236 "Require the VM to acquire the class loader lock before calling " \ 1237 "loadClass() even for class loaders registering " \ 1238 "as parallel capable") \ 1239 \ 1240 product(bool, AllowParallelDefineClass, false, \ 1241 "Allow parallel defineClass requests for class loaders " \ 1242 "registering as parallel capable") \ 1243 \ 1244 product(bool, MustCallLoadClassInternal, false, \ 1245 "Call loadClassInternal() rather than loadClass()") \ 1246 \ 1247 product_pd(bool, DontYieldALot, \ 1248 "Throw away obvious excess yield calls") \ 1249 \ 1250 product_pd(bool, ConvertSleepToYield, \ 1251 "Convert sleep(0) to thread yield " \ 1252 "(may be off for Solaris to improve GUI)") \ 1253 \ 1254 product(bool, ConvertYieldToSleep, false, \ 1255 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1256 "behavior") \ 1257 \ 1258 develop(bool, UseDetachedThreads, true, \ 1259 "Use detached threads that are recycled upon termination " \ 1260 "(for Solaris only)") \ 1261 \ 1262 product(bool, UseLWPSynchronization, true, \ 1263 "Use LWP-based instead of libthread-based synchronization " \ 1264 "(SPARC only)") \ 1265 \ 1266 experimental(ccstr, SyncKnobs, NULL, \ 1267 "(Unstable) Various monitor synchronization tunables") \ 1268 \ 1269 experimental(intx, EmitSync, 0, \ 1270 "(Unsafe, Unstable) " \ 1271 "Control emission of inline sync fast-path code") \ 1272 \ 1273 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1274 range(0, max_jint) \ 1275 \ 1276 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1277 \ 1278 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1279 "Experimental Sync flags") \ 1280 \ 1281 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1282 \ 1283 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \ 1284 \ 1285 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1286 \ 1287 experimental(intx, hashCode, 5, \ 1288 "(Unstable) select hashCode generation algorithm") \ 1289 \ 1290 experimental(intx, WorkAroundNPTLTimedWaitHang, 0, \ 1291 "(Unstable, Linux-specific) " \ 1292 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \ 1293 \ 1294 product(bool, FilterSpuriousWakeups, true, \ 1295 "When true prevents OS-level spurious, or premature, wakeups " \ 1296 "from Object.wait (Ignored for Windows)") \ 1297 \ 1298 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1299 \ 1300 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1301 \ 1302 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1303 \ 1304 develop(bool, UsePthreads, false, \ 1305 "Use pthread-based instead of libthread-based synchronization " \ 1306 "(SPARC only)") \ 1307 \ 1308 product(bool, ReduceSignalUsage, false, \ 1309 "Reduce the use of OS signals in Java and/or the VM") \ 1310 \ 1311 develop_pd(bool, ShareVtableStubs, \ 1312 "Share vtable stubs (smaller code but worse branch prediction") \ 1313 \ 1314 develop(bool, LoadLineNumberTables, true, \ 1315 "Tell whether the class file parser loads line number tables") \ 1316 \ 1317 develop(bool, LoadLocalVariableTables, true, \ 1318 "Tell whether the class file parser loads local variable tables") \ 1319 \ 1320 develop(bool, LoadLocalVariableTypeTables, true, \ 1321 "Tell whether the class file parser loads local variable type" \ 1322 "tables") \ 1323 \ 1324 product(bool, AllowUserSignalHandlers, false, \ 1325 "Do not complain if the application installs signal handlers " \ 1326 "(Solaris & Linux only)") \ 1327 \ 1328 product(bool, UseSignalChaining, true, \ 1329 "Use signal-chaining to invoke signal handlers installed " \ 1330 "by the application (Solaris & Linux only)") \ 1331 \ 1332 product(bool, AllowJNIEnvProxy, false, \ 1333 "Allow JNIEnv proxies for jdbx") \ 1334 \ 1335 product(bool, RestoreMXCSROnJNICalls, false, \ 1336 "Restore MXCSR when returning from JNI calls") \ 1337 \ 1338 product(bool, CheckJNICalls, false, \ 1339 "Verify all arguments to JNI calls") \ 1340 \ 1341 product(bool, CheckEndorsedAndExtDirs, false, \ 1342 "Verify the endorsed and extension directories are not used") \ 1343 \ 1344 product(bool, UseFastJNIAccessors, true, \ 1345 "Use optimized versions of Get<Primitive>Field") \ 1346 \ 1347 product(intx, MaxJNILocalCapacity, 65536, \ 1348 "Maximum allowable local JNI handle capacity to " \ 1349 "EnsureLocalCapacity() and PushLocalFrame(), " \ 1350 "where <= 0 is unlimited, default: 65536") \ 1351 range(min_intx, max_intx) \ 1352 \ 1353 product(bool, EagerXrunInit, false, \ 1354 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1355 "but not all -Xrun libraries may support the state of the VM " \ 1356 "at this time") \ 1357 \ 1358 product(bool, PreserveAllAnnotations, false, \ 1359 "Preserve RuntimeInvisibleAnnotations as well " \ 1360 "as RuntimeVisibleAnnotations") \ 1361 \ 1362 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1363 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1364 \ 1365 product(bool, UseXMMForArrayCopy, false, \ 1366 "Use SSE2 MOVQ instruction for Arraycopy") \ 1367 \ 1368 product(intx, FieldsAllocationStyle, 1, \ 1369 "0 - type based with oops first, " \ 1370 "1 - with oops last, " \ 1371 "2 - oops in super and sub classes are together") \ 1372 range(0, 2) \ 1373 \ 1374 product(bool, CompactFields, true, \ 1375 "Allocate nonstatic fields in gaps between previous fields") \ 1376 \ 1377 notproduct(bool, PrintFieldLayout, false, \ 1378 "Print field layout for each class") \ 1379 \ 1380 /* Need to limit the extent of the padding to reasonable size. */\ 1381 /* 8K is well beyond the reasonable HW cache line size, even with */\ 1382 /* aggressive prefetching, while still leaving the room for segregating */\ 1383 /* among the distinct pages. */\ 1384 product(intx, ContendedPaddingWidth, 128, \ 1385 "How many bytes to pad the fields/classes marked @Contended with")\ 1386 range(0, 8192) \ 1387 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 1388 \ 1389 product(bool, EnableContended, true, \ 1390 "Enable @Contended annotation support") \ 1391 \ 1392 product(bool, RestrictContended, true, \ 1393 "Restrict @Contended to trusted classes") \ 1394 \ 1395 product(bool, UseBiasedLocking, true, \ 1396 "Enable biased locking in JVM") \ 1397 \ 1398 product(intx, BiasedLockingStartupDelay, 4000, \ 1399 "Number of milliseconds to wait before enabling biased locking") \ 1400 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 1401 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 1402 \ 1403 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1404 "Print statistics of biased locking in JVM") \ 1405 \ 1406 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1407 "Threshold of number of revocations per type to try to " \ 1408 "rebias all objects in the heap of that type") \ 1409 range(0, max_intx) \ 1410 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 1411 \ 1412 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1413 "Threshold of number of revocations per type to permanently " \ 1414 "revoke biases of all objects in the heap of that type") \ 1415 range(0, max_intx) \ 1416 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 1417 \ 1418 product(intx, BiasedLockingDecayTime, 25000, \ 1419 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1420 "type after previous bulk rebias") \ 1421 range(500, max_intx) \ 1422 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 1423 \ 1424 /* tracing */ \ 1425 \ 1426 develop(bool, StressRewriter, false, \ 1427 "Stress linktime bytecode rewriting") \ 1428 \ 1429 product(ccstr, TraceJVMTI, NULL, \ 1430 "Trace flags for JVMTI functions and events") \ 1431 \ 1432 /* This option can change an EMCP method into an obsolete method. */ \ 1433 /* This can affect tests that except specific methods to be EMCP. */ \ 1434 /* This option should be used with caution. */ \ 1435 product(bool, StressLdcRewrite, false, \ 1436 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1437 \ 1438 product(uintx, TraceRedefineClasses, 0, \ 1439 "Trace level for JVMTI RedefineClasses") \ 1440 range(0, 0xFFFFFFFF) \ 1441 \ 1442 /* change to false by default sometime after Mustang */ \ 1443 product(bool, VerifyMergedCPBytecodes, true, \ 1444 "Verify bytecodes after RedefineClasses constant pool merging") \ 1445 \ 1446 develop(bool, TraceJNIHandleAllocation, false, \ 1447 "Trace allocation/deallocation of JNI handle blocks") \ 1448 \ 1449 develop(bool, TraceBytecodes, false, \ 1450 "Trace bytecode execution") \ 1451 \ 1452 product(bool, TraceExceptions, false, \ 1453 "Trace exceptions") \ 1454 \ 1455 develop(bool, TraceICs, false, \ 1456 "Trace inline cache changes") \ 1457 \ 1458 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1459 "Trace method invocation counter overflow") \ 1460 \ 1461 develop(bool, TraceInlineCacheClearing, false, \ 1462 "Trace clearing of inline caches in nmethods") \ 1463 \ 1464 develop(bool, TraceDependencies, false, \ 1465 "Trace dependencies") \ 1466 \ 1467 develop(bool, VerifyDependencies, trueInDebug, \ 1468 "Exercise and verify the compilation dependency mechanism") \ 1469 \ 1470 develop(bool, TraceNewOopMapGeneration, false, \ 1471 "Trace OopMapGeneration") \ 1472 \ 1473 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1474 "Trace OopMapGeneration: print detailed cell states") \ 1475 \ 1476 develop(bool, TimeOopMap, false, \ 1477 "Time calls to GenerateOopMap::compute_map() in sum") \ 1478 \ 1479 develop(bool, TimeOopMap2, false, \ 1480 "Time calls to GenerateOopMap::compute_map() individually") \ 1481 \ 1482 develop(bool, TraceMonitorMismatch, false, \ 1483 "Trace monitor matching failures during OopMapGeneration") \ 1484 \ 1485 develop(bool, TraceOopMapRewrites, false, \ 1486 "Trace rewriting of method oops during oop map generation") \ 1487 \ 1488 develop(bool, TraceICBuffer, false, \ 1489 "Trace usage of IC buffer") \ 1490 \ 1491 develop(bool, TraceCompiledIC, false, \ 1492 "Trace changes of compiled IC") \ 1493 \ 1494 develop(bool, TraceStartupTime, false, \ 1495 "Trace setup time") \ 1496 \ 1497 develop(bool, TraceProtectionDomainVerification, false, \ 1498 "Trace protection domain verification") \ 1499 \ 1500 develop(bool, TraceClearedExceptions, false, \ 1501 "Print when an exception is forcibly cleared") \ 1502 \ 1503 product(bool, TraceClassResolution, false, \ 1504 "Trace all constant pool resolutions (for debugging)") \ 1505 \ 1506 product(bool, TraceBiasedLocking, false, \ 1507 "Trace biased locking in JVM") \ 1508 \ 1509 product(bool, TraceMonitorInflation, false, \ 1510 "Trace monitor inflation in JVM") \ 1511 \ 1512 /* gc */ \ 1513 \ 1514 product(bool, UseSerialGC, false, \ 1515 "Use the Serial garbage collector") \ 1516 \ 1517 product(bool, UseG1GC, false, \ 1518 "Use the Garbage-First garbage collector") \ 1519 \ 1520 product(bool, UseParallelGC, false, \ 1521 "Use the Parallel Scavenge garbage collector") \ 1522 \ 1523 product(bool, UseParallelOldGC, false, \ 1524 "Use the Parallel Old garbage collector") \ 1525 \ 1526 product(uintx, HeapMaximumCompactionInterval, 20, \ 1527 "How often should we maximally compact the heap (not allowing " \ 1528 "any dead space)") \ 1529 \ 1530 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1531 "The collection count for the first maximum compaction") \ 1532 \ 1533 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1534 "Use maximum compaction in the Parallel Old garbage collector " \ 1535 "for a system GC") \ 1536 \ 1537 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1538 "The mean used by the parallel compact dead wood " \ 1539 "limiter (a number between 0-100)") \ 1540 range(0, 100) \ 1541 \ 1542 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1543 "The standard deviation used by the parallel compact dead wood " \ 1544 "limiter (a number between 0-100)") \ 1545 range(0, 100) \ 1546 \ 1547 product(uint, ParallelGCThreads, 0, \ 1548 "Number of parallel threads parallel gc will use") \ 1549 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \ 1550 \ 1551 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \ 1552 "Use semaphore synchronization for the GC Threads, " \ 1553 "instead of synchronization based on mutexes") \ 1554 \ 1555 product(bool, UseDynamicNumberOfGCThreads, false, \ 1556 "Dynamically choose the number of parallel threads " \ 1557 "parallel gc will use") \ 1558 \ 1559 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1560 "Force dynamic selection of the number of " \ 1561 "parallel threads parallel gc will use to aid debugging") \ 1562 \ 1563 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1564 "Size of heap (bytes) per GC thread used in calculating the " \ 1565 "number of GC threads") \ 1566 range((size_t)os::vm_page_size(), (size_t)max_uintx) \ 1567 \ 1568 product(bool, TraceDynamicGCThreads, false, \ 1569 "Trace the dynamic GC thread usage") \ 1570 \ 1571 product(uint, ConcGCThreads, 0, \ 1572 "Number of threads concurrent gc will use") \ 1573 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \ 1574 \ 1575 product(uintx, GCTaskTimeStampEntries, 200, \ 1576 "Number of time stamp entries per gc worker thread") \ 1577 range(1, max_uintx) \ 1578 \ 1579 product(bool, AlwaysTenure, false, \ 1580 "Always tenure objects in eden (ParallelGC only)") \ 1581 \ 1582 product(bool, NeverTenure, false, \ 1583 "Never tenure objects in eden, may tenure on overflow " \ 1584 "(ParallelGC only)") \ 1585 \ 1586 product(bool, ScavengeBeforeFullGC, true, \ 1587 "Scavenge youngest generation before each full GC.") \ 1588 \ 1589 product(bool, UseConcMarkSweepGC, false, \ 1590 "Use Concurrent Mark-Sweep GC in the old generation") \ 1591 \ 1592 product(bool, ExplicitGCInvokesConcurrent, false, \ 1593 "A System.gc() request invokes a concurrent collection; " \ 1594 "(effective only when using concurrent collectors)") \ 1595 \ 1596 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1597 "A System.gc() request invokes a concurrent collection and " \ 1598 "also unloads classes during such a concurrent gc cycle " \ 1599 "(effective only when UseConcMarkSweepGC)") \ 1600 \ 1601 product(bool, GCLockerInvokesConcurrent, false, \ 1602 "The exit of a JNI critical section necessitating a scavenge, " \ 1603 "also kicks off a background concurrent collection") \ 1604 \ 1605 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1606 "How much the GC can expand the eden by while the GC locker " \ 1607 "is active (as a percentage)") \ 1608 range(0, 100) \ 1609 \ 1610 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1611 "Number of times to retry allocations when " \ 1612 "blocked by the GC locker") \ 1613 \ 1614 product(bool, UseCMSBestFit, true, \ 1615 "Use CMS best fit allocation strategy") \ 1616 \ 1617 product(bool, UseParNewGC, false, \ 1618 "Use parallel threads in the new generation") \ 1619 \ 1620 product(bool, PrintTaskqueue, false, \ 1621 "Print taskqueue statistics for parallel collectors") \ 1622 \ 1623 product(bool, PrintTerminationStats, false, \ 1624 "Print termination statistics for parallel collectors") \ 1625 \ 1626 product(uintx, ParallelGCBufferWastePct, 10, \ 1627 "Wasted fraction of parallel allocation buffer") \ 1628 range(0, 100) \ 1629 \ 1630 product(uintx, TargetPLABWastePct, 10, \ 1631 "Target wasted space in last buffer as percent of overall " \ 1632 "allocation") \ 1633 range(1, 100) \ 1634 \ 1635 product(uintx, PLABWeight, 75, \ 1636 "Percentage (0-100) used to weight the current sample when " \ 1637 "computing exponentially decaying average for ResizePLAB") \ 1638 range(0, 100) \ 1639 \ 1640 product(bool, ResizePLAB, true, \ 1641 "Dynamically resize (survivor space) promotion LAB's") \ 1642 \ 1643 product(bool, PrintPLAB, false, \ 1644 "Print (survivor space) promotion LAB's sizing decisions") \ 1645 \ 1646 product(intx, ParGCArrayScanChunk, 50, \ 1647 "Scan a subset of object array and push remainder, if array is " \ 1648 "bigger than this") \ 1649 range(1, max_intx) \ 1650 \ 1651 product(bool, ParGCUseLocalOverflow, false, \ 1652 "Instead of a global overflow list, use local overflow stacks") \ 1653 \ 1654 product(bool, ParGCTrimOverflow, true, \ 1655 "Eagerly trim the local overflow lists " \ 1656 "(when ParGCUseLocalOverflow)") \ 1657 \ 1658 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1659 "Simulate work queue overflow in ParNew") \ 1660 \ 1661 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1662 "An `interval' counter that determines how frequently " \ 1663 "we simulate overflow; a smaller number increases frequency") \ 1664 \ 1665 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1666 "The desired number of objects to claim from the overflow list") \ 1667 \ 1668 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1669 "The number of strides per worker thread that we divide up the " \ 1670 "card table scanning work into") \ 1671 range(1, max_uintx) \ 1672 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \ 1673 \ 1674 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1675 "The number of cards in each chunk of the parallel chunks used " \ 1676 "during card table scanning") \ 1677 range(1, max_intx) \ 1678 \ 1679 product(uintx, OldPLABWeight, 50, \ 1680 "Percentage (0-100) used to weight the current sample when " \ 1681 "computing exponentially decaying average for resizing " \ 1682 "OldPLABSize") \ 1683 range(0, 100) \ 1684 \ 1685 product(bool, ResizeOldPLAB, true, \ 1686 "Dynamically resize (old gen) promotion LAB's") \ 1687 \ 1688 product(bool, PrintOldPLAB, false, \ 1689 "Print (old gen) promotion LAB's sizing decisions") \ 1690 \ 1691 product(size_t, CMSOldPLABMax, 1024, \ 1692 "Maximum size of CMS gen promotion LAB caches per worker " \ 1693 "per block size") \ 1694 range(1, max_uintx) \ 1695 constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \ 1696 \ 1697 product(size_t, CMSOldPLABMin, 16, \ 1698 "Minimum size of CMS gen promotion LAB caches per worker " \ 1699 "per block size") \ 1700 range(1, max_uintx) \ 1701 constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \ 1702 \ 1703 product(uintx, CMSOldPLABNumRefills, 4, \ 1704 "Nominal number of refills of CMS gen promotion LAB cache " \ 1705 "per worker per block size") \ 1706 range(1, max_uintx) \ 1707 \ 1708 product(bool, CMSOldPLABResizeQuicker, false, \ 1709 "React on-the-fly during a scavenge to a sudden " \ 1710 "change in block demand rate") \ 1711 \ 1712 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1713 "The tolerance of the phase-change detector for on-the-fly " \ 1714 "PLAB resizing during a scavenge") \ 1715 range(1, max_uintx) \ 1716 \ 1717 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1718 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1719 "during a scavenge") \ 1720 \ 1721 product(bool, AlwaysPreTouch, false, \ 1722 "Force all freshly committed pages to be pre-touched") \ 1723 \ 1724 product_pd(size_t, CMSYoungGenPerWorker, \ 1725 "The maximum size of young gen chosen by default per GC worker " \ 1726 "thread available") \ 1727 range(1, max_uintx) \ 1728 \ 1729 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1730 "Percentage (0-100) used to add conservatism when computing the " \ 1731 "duty cycle") \ 1732 range(0, 100) \ 1733 \ 1734 product(uintx, CMSExpAvgFactor, 50, \ 1735 "Percentage (0-100) used to weight the current sample when " \ 1736 "computing exponential averages for CMS statistics") \ 1737 range(0, 100) \ 1738 \ 1739 product(uintx, CMS_FLSWeight, 75, \ 1740 "Percentage (0-100) used to weight the current sample when " \ 1741 "computing exponentially decaying averages for CMS FLS " \ 1742 "statistics") \ 1743 range(0, 100) \ 1744 \ 1745 product(uintx, CMS_FLSPadding, 1, \ 1746 "The multiple of deviation from mean to use for buffering " \ 1747 "against volatility in free list demand") \ 1748 \ 1749 product(uintx, FLSCoalescePolicy, 2, \ 1750 "CMS: aggressiveness level for coalescing, increasing " \ 1751 "from 0 to 4") \ 1752 range(0, 4) \ 1753 \ 1754 product(bool, FLSAlwaysCoalesceLarge, false, \ 1755 "CMS: larger free blocks are always available for coalescing") \ 1756 \ 1757 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1758 "CMS: the smaller the percentage the greater the coalescing " \ 1759 "force") \ 1760 range(0.0, 1.0) \ 1761 \ 1762 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1763 "CMS: the factor by which to inflate estimated demand of small " \ 1764 "block sizes to prevent coalescing with an adjoining block") \ 1765 range(0.0, DBL_MAX) \ 1766 \ 1767 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1768 "CMS: the factor by which to inflate estimated demand of large " \ 1769 "block sizes to prevent coalescing with an adjoining block") \ 1770 range(0.0, DBL_MAX) \ 1771 \ 1772 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1773 "CMS: the factor by which to inflate estimated demand of small " \ 1774 "block sizes to prevent splitting to supply demand for smaller " \ 1775 "blocks") \ 1776 range(0.0, DBL_MAX) \ 1777 \ 1778 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1779 "CMS: the factor by which to inflate estimated demand of large " \ 1780 "block sizes to prevent splitting to supply demand for smaller " \ 1781 "blocks") \ 1782 range(0.0, DBL_MAX) \ 1783 \ 1784 product(bool, CMSExtrapolateSweep, false, \ 1785 "CMS: cushion for block demand during sweep") \ 1786 \ 1787 product(uintx, CMS_SweepWeight, 75, \ 1788 "Percentage (0-100) used to weight the current sample when " \ 1789 "computing exponentially decaying average for inter-sweep " \ 1790 "duration") \ 1791 range(0, 100) \ 1792 \ 1793 product(uintx, CMS_SweepPadding, 1, \ 1794 "The multiple of deviation from mean to use for buffering " \ 1795 "against volatility in inter-sweep duration") \ 1796 \ 1797 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1798 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1799 "duration exceeds this threshold in milliseconds") \ 1800 \ 1801 product(bool, CMSClassUnloadingEnabled, true, \ 1802 "Whether class unloading enabled when using CMS GC") \ 1803 \ 1804 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1805 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1806 "count for which classes may not be unloaded") \ 1807 \ 1808 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1809 "Replenish an indexed free list with this number of chunks") \ 1810 range(1, max_uintx) \ 1811 \ 1812 product(bool, CMSReplenishIntermediate, true, \ 1813 "Replenish all intermediate free-list caches") \ 1814 \ 1815 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1816 "When satisfying batched demand, split blocks from the " \ 1817 "IndexedFreeList whose size is a multiple of requested size") \ 1818 \ 1819 product(bool, CMSLoopWarn, false, \ 1820 "Warn in case of excessive CMS looping") \ 1821 \ 1822 /* where does the range max value of (max_jint - 1) come from? */ \ 1823 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1824 "Maximum size of marking stack") \ 1825 range(1, (max_jint - 1)) \ 1826 \ 1827 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1828 "Size of marking stack") \ 1829 constraint(MarkStackSizeConstraintFunc,AfterErgo) \ 1830 \ 1831 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1832 "Simulate frequent marking stack / work queue overflow") \ 1833 \ 1834 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1835 "An \"interval\" counter that determines how frequently " \ 1836 "to simulate overflow; a smaller number increases frequency") \ 1837 \ 1838 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1839 "Maximum number of abortable preclean iterations, if > 0") \ 1840 \ 1841 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1842 "Maximum time in abortable preclean (in milliseconds)") \ 1843 range(0, max_intx) \ 1844 \ 1845 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1846 "Nominal minimum work per abortable preclean iteration") \ 1847 \ 1848 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1849 "Time that we sleep between iterations when not given " \ 1850 "enough work per iteration") \ 1851 range(0, max_intx) \ 1852 \ 1853 product(size_t, CMSRescanMultiple, 32, \ 1854 "Size (in cards) of CMS parallel rescan task") \ 1855 range(1, max_uintx) \ 1856 \ 1857 product(size_t, CMSConcMarkMultiple, 32, \ 1858 "Size (in cards) of CMS concurrent MT marking task") \ 1859 range(1, max_uintx) \ 1860 \ 1861 product(bool, CMSAbortSemantics, false, \ 1862 "Whether abort-on-overflow semantics is implemented") \ 1863 \ 1864 product(bool, CMSParallelInitialMarkEnabled, true, \ 1865 "Use the parallel initial mark.") \ 1866 \ 1867 product(bool, CMSParallelRemarkEnabled, true, \ 1868 "Whether parallel remark enabled (only if ParNewGC)") \ 1869 \ 1870 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1871 "Whether parallel remark of survivor space " \ 1872 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1873 \ 1874 product(bool, CMSPLABRecordAlways, true, \ 1875 "Always record survivor space PLAB boundaries (effective only " \ 1876 "if CMSParallelSurvivorRemarkEnabled)") \ 1877 \ 1878 product(bool, CMSEdenChunksRecordAlways, true, \ 1879 "Always record eden chunks used for the parallel initial mark " \ 1880 "or remark of eden") \ 1881 \ 1882 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1883 "Print the eden and the survivor chunks used for the parallel " \ 1884 "initial mark or remark of the eden/survivor spaces") \ 1885 \ 1886 product(bool, CMSConcurrentMTEnabled, true, \ 1887 "Whether multi-threaded concurrent work enabled " \ 1888 "(effective only if ParNewGC)") \ 1889 \ 1890 product(bool, CMSPrecleaningEnabled, true, \ 1891 "Whether concurrent precleaning enabled") \ 1892 \ 1893 product(uintx, CMSPrecleanIter, 3, \ 1894 "Maximum number of precleaning iteration passes") \ 1895 range(0, 9) \ 1896 \ 1897 product(uintx, CMSPrecleanDenominator, 3, \ 1898 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1899 "ratio") \ 1900 range(1, max_uintx) \ 1901 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \ 1902 \ 1903 product(uintx, CMSPrecleanNumerator, 2, \ 1904 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1905 "ratio") \ 1906 range(0, max_uintx-1) \ 1907 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \ 1908 \ 1909 product(bool, CMSPrecleanRefLists1, true, \ 1910 "Preclean ref lists during (initial) preclean phase") \ 1911 \ 1912 product(bool, CMSPrecleanRefLists2, false, \ 1913 "Preclean ref lists during abortable preclean phase") \ 1914 \ 1915 product(bool, CMSPrecleanSurvivors1, false, \ 1916 "Preclean survivors during (initial) preclean phase") \ 1917 \ 1918 product(bool, CMSPrecleanSurvivors2, true, \ 1919 "Preclean survivors during abortable preclean phase") \ 1920 \ 1921 product(uintx, CMSPrecleanThreshold, 1000, \ 1922 "Do not iterate again if number of dirty cards is less than this")\ 1923 range(100, max_uintx) \ 1924 \ 1925 product(bool, CMSCleanOnEnter, true, \ 1926 "Clean-on-enter optimization for reducing number of dirty cards") \ 1927 \ 1928 product(uintx, CMSRemarkVerifyVariant, 1, \ 1929 "Choose variant (1,2) of verification following remark") \ 1930 range(1, 2) \ 1931 \ 1932 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1933 "If Eden size is below this, do not try to schedule remark") \ 1934 \ 1935 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1936 "The Eden occupancy percentage (0-100) at which " \ 1937 "to try and schedule remark pause") \ 1938 range(0, 100) \ 1939 \ 1940 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1941 "Start sampling eden top at least before young gen " \ 1942 "occupancy reaches 1/<ratio> of the size at which " \ 1943 "we plan to schedule remark") \ 1944 range(1, max_uintx) \ 1945 \ 1946 product(uintx, CMSSamplingGrain, 16*K, \ 1947 "The minimum distance between eden samples for CMS (see above)") \ 1948 range(1, max_uintx) \ 1949 \ 1950 product(bool, CMSScavengeBeforeRemark, false, \ 1951 "Attempt scavenge before the CMS remark step") \ 1952 \ 1953 develop(bool, CMSTraceSweeper, false, \ 1954 "Trace some actions of the CMS sweeper") \ 1955 \ 1956 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1957 "Don't drain below this size per parallel worker/thief") \ 1958 range(1, max_juint) \ 1959 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \ 1960 \ 1961 manageable(intx, CMSWaitDuration, 2000, \ 1962 "Time in milliseconds that CMS thread waits for young GC") \ 1963 \ 1964 develop(uintx, CMSCheckInterval, 1000, \ 1965 "Interval in milliseconds that CMS thread checks if it " \ 1966 "should start a collection cycle") \ 1967 \ 1968 product(bool, CMSYield, true, \ 1969 "Yield between steps of CMS") \ 1970 \ 1971 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1972 "Bitmap operations should process at most this many bits " \ 1973 "between yields") \ 1974 range(1, max_uintx) \ 1975 \ 1976 product(bool, CMSDumpAtPromotionFailure, false, \ 1977 "Dump useful information about the state of the CMS old " \ 1978 "generation upon a promotion failure") \ 1979 \ 1980 product(bool, CMSPrintChunksInDump, false, \ 1981 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1982 "more detailed information about the free chunks") \ 1983 \ 1984 product(bool, CMSPrintObjectsInDump, false, \ 1985 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1986 "more detailed information about the allocated objects") \ 1987 \ 1988 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1989 "Verify that all references across the FLS boundary " \ 1990 "are to valid objects") \ 1991 \ 1992 diagnostic(bool, FLSVerifyLists, false, \ 1993 "Do lots of (expensive) FreeListSpace verification") \ 1994 \ 1995 diagnostic(bool, FLSVerifyIndexTable, false, \ 1996 "Do lots of (expensive) FLS index table verification") \ 1997 \ 1998 develop(bool, FLSVerifyDictionary, false, \ 1999 "Do lots of (expensive) FLS dictionary verification") \ 2000 \ 2001 develop(bool, VerifyBlockOffsetArray, false, \ 2002 "Do (expensive) block offset array verification") \ 2003 \ 2004 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 2005 "Maintain _unallocated_block in BlockOffsetArray " \ 2006 "(currently applicable only to CMS collector)") \ 2007 \ 2008 develop(bool, TraceCMSState, false, \ 2009 "Trace the state of the CMS collection") \ 2010 \ 2011 product(intx, RefDiscoveryPolicy, 0, \ 2012 "Select type of reference discovery policy: " \ 2013 "reference-based(0) or referent-based(1)") \ 2014 range(ReferenceProcessor::DiscoveryPolicyMin, \ 2015 ReferenceProcessor::DiscoveryPolicyMax) \ 2016 \ 2017 product(bool, ParallelRefProcEnabled, false, \ 2018 "Enable parallel reference processing whenever possible") \ 2019 \ 2020 product(bool, ParallelRefProcBalancingEnabled, true, \ 2021 "Enable balancing of reference processing queues") \ 2022 \ 2023 product(uintx, CMSTriggerRatio, 80, \ 2024 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 2025 "allocated before a CMS collection cycle commences") \ 2026 range(0, 100) \ 2027 \ 2028 product(uintx, CMSBootstrapOccupancy, 50, \ 2029 "Percentage CMS generation occupancy at which to " \ 2030 "initiate CMS collection for bootstrapping collection stats") \ 2031 range(0, 100) \ 2032 \ 2033 product(intx, CMSInitiatingOccupancyFraction, -1, \ 2034 "Percentage CMS generation occupancy to start a CMS collection " \ 2035 "cycle. A negative value means that CMSTriggerRatio is used") \ 2036 range(min_intx, 100) \ 2037 \ 2038 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 2039 "Percentage of the (entire) heap occupancy to start a " \ 2040 "concurrent GC cycle. It is used by GCs that trigger a " \ 2041 "concurrent GC cycle based on the occupancy of the entire heap, " \ 2042 "not just one of the generations (e.g., G1). A value of 0 " \ 2043 "denotes 'do constant GC cycles'.") \ 2044 range(0, 100) \ 2045 \ 2046 manageable(intx, CMSTriggerInterval, -1, \ 2047 "Commence a CMS collection cycle (at least) every so many " \ 2048 "milliseconds (0 permanently, -1 disabled)") \ 2049 range(-1, max_intx) \ 2050 \ 2051 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2052 "Only use occupancy as a criterion for starting a CMS collection")\ 2053 \ 2054 product(uintx, CMSIsTooFullPercentage, 98, \ 2055 "An absolute ceiling above which CMS will always consider the " \ 2056 "unloading of classes when class unloading is enabled") \ 2057 range(0, 100) \ 2058 \ 2059 develop(bool, CMSTestInFreeList, false, \ 2060 "Check if the coalesced range is already in the " \ 2061 "free lists as claimed") \ 2062 \ 2063 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2064 "Check that all the garbage collected was returned to the " \ 2065 "free lists") \ 2066 \ 2067 notproduct(bool, ScavengeALot, false, \ 2068 "Force scavenge at every Nth exit from the runtime system " \ 2069 "(N=ScavengeALotInterval)") \ 2070 \ 2071 develop(bool, FullGCALot, false, \ 2072 "Force full gc at every Nth exit from the runtime system " \ 2073 "(N=FullGCALotInterval)") \ 2074 \ 2075 notproduct(bool, GCALotAtAllSafepoints, false, \ 2076 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2077 \ 2078 product(bool, PrintPromotionFailure, false, \ 2079 "Print additional diagnostic information following " \ 2080 "promotion failure") \ 2081 \ 2082 notproduct(bool, PromotionFailureALot, false, \ 2083 "Use promotion failure handling on every youngest generation " \ 2084 "collection") \ 2085 \ 2086 develop(uintx, PromotionFailureALotCount, 1000, \ 2087 "Number of promotion failures occurring at PLAB " \ 2088 "refill attempts (ParNew) or promotion attempts " \ 2089 "(other young collectors)") \ 2090 \ 2091 develop(uintx, PromotionFailureALotInterval, 5, \ 2092 "Total collections between promotion failures a lot") \ 2093 \ 2094 experimental(uintx, WorkStealingSleepMillis, 1, \ 2095 "Sleep time when sleep is used for yields") \ 2096 \ 2097 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2098 "Number of yields before a sleep is done during work stealing") \ 2099 \ 2100 experimental(uintx, WorkStealingHardSpins, 4096, \ 2101 "Number of iterations in a spin loop between checks on " \ 2102 "time out of hard spin") \ 2103 \ 2104 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2105 "Ratio of hard spins to calls to yield") \ 2106 \ 2107 develop(uintx, ObjArrayMarkingStride, 512, \ 2108 "Number of object array elements to push onto the marking stack " \ 2109 "before pushing a continuation entry") \ 2110 \ 2111 develop(bool, MetadataAllocationFailALot, false, \ 2112 "Fail metadata allocations at intervals controlled by " \ 2113 "MetadataAllocationFailALotInterval") \ 2114 \ 2115 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2116 "Metadata allocation failure a lot interval") \ 2117 \ 2118 develop(bool, TraceMetadataChunkAllocation, false, \ 2119 "Trace chunk metadata allocations") \ 2120 \ 2121 product(bool, TraceMetadataHumongousAllocation, false, \ 2122 "Trace humongous metadata allocations") \ 2123 \ 2124 develop(bool, TraceMetavirtualspaceAllocation, false, \ 2125 "Trace virtual space metadata allocations") \ 2126 \ 2127 notproduct(bool, ExecuteInternalVMTests, false, \ 2128 "Enable execution of internal VM tests") \ 2129 \ 2130 notproduct(bool, VerboseInternalVMTests, false, \ 2131 "Turn on logging for internal VM tests.") \ 2132 \ 2133 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2134 \ 2135 product_pd(bool, ResizeTLAB, \ 2136 "Dynamically resize TLAB size for threads") \ 2137 \ 2138 product(bool, ZeroTLAB, false, \ 2139 "Zero out the newly created TLAB") \ 2140 \ 2141 product(bool, FastTLABRefill, true, \ 2142 "Use fast TLAB refill code") \ 2143 \ 2144 product(bool, PrintTLAB, false, \ 2145 "Print various TLAB related information") \ 2146 \ 2147 product(bool, TLABStats, true, \ 2148 "Provide more detailed and expensive TLAB statistics " \ 2149 "(with PrintTLAB)") \ 2150 \ 2151 product_pd(bool, NeverActAsServerClassMachine, \ 2152 "Never act like a server-class machine") \ 2153 \ 2154 product(bool, AlwaysActAsServerClassMachine, false, \ 2155 "Always act like a server-class machine") \ 2156 \ 2157 product_pd(uint64_t, MaxRAM, \ 2158 "Real memory size (in bytes) used to set maximum heap size") \ 2159 range(0, 0XFFFFFFFFFFFFFFFF) \ 2160 \ 2161 product(size_t, ErgoHeapSizeLimit, 0, \ 2162 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2163 "MaxRAM / MaxRAMFraction") \ 2164 \ 2165 product(uintx, MaxRAMFraction, 4, \ 2166 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2167 "size") \ 2168 range(1, max_uintx) \ 2169 \ 2170 product(uintx, MinRAMFraction, 2, \ 2171 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2172 "size on systems with small physical memory size") \ 2173 range(1, max_uintx) \ 2174 \ 2175 product(uintx, InitialRAMFraction, 64, \ 2176 "Fraction (1/n) of real memory used for initial heap size") \ 2177 range(1, max_uintx) \ 2178 \ 2179 develop(uintx, MaxVirtMemFraction, 2, \ 2180 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2181 "determining maximum heap size") \ 2182 \ 2183 product(bool, UseAutoGCSelectPolicy, false, \ 2184 "Use automatic collection selection policy") \ 2185 \ 2186 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2187 "Automatic GC selection pause threshold in milliseconds") \ 2188 \ 2189 product(bool, UseAdaptiveSizePolicy, true, \ 2190 "Use adaptive generation sizing policies") \ 2191 \ 2192 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2193 "Use adaptive survivor sizing policies") \ 2194 \ 2195 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2196 "Use adaptive young-old sizing policies at minor collections") \ 2197 \ 2198 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2199 "Use adaptive young-old sizing policies at major collections") \ 2200 \ 2201 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2202 "Include statistics from System.gc() for adaptive size policy") \ 2203 \ 2204 product(bool, UseAdaptiveGCBoundary, false, \ 2205 "Allow young-old boundary to move") \ 2206 \ 2207 develop(bool, TraceAdaptiveGCBoundary, false, \ 2208 "Trace young-old boundary moves") \ 2209 \ 2210 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2211 "Resize the virtual spaces of the young or old generations") \ 2212 range(-1, 1) \ 2213 \ 2214 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2215 "Policy for changing generation size for throughput goals") \ 2216 range(0, 1) \ 2217 \ 2218 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2219 "Number of steps where heuristics is used before data is used") \ 2220 \ 2221 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2222 "Number of collections before the adaptive sizing is started") \ 2223 \ 2224 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2225 "Collection interval for printing information; zero means never") \ 2226 \ 2227 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2228 "Use adaptive minimum footprint as a goal") \ 2229 \ 2230 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2231 "Weight given to exponential resizing, between 0 and 100") \ 2232 range(0, 100) \ 2233 \ 2234 product(uintx, AdaptiveTimeWeight, 25, \ 2235 "Weight given to time in adaptive policy, between 0 and 100") \ 2236 range(0, 100) \ 2237 \ 2238 product(uintx, PausePadding, 1, \ 2239 "How much buffer to keep for pause time") \ 2240 \ 2241 product(uintx, PromotedPadding, 3, \ 2242 "How much buffer to keep for promotion failure") \ 2243 \ 2244 product(uintx, SurvivorPadding, 3, \ 2245 "How much buffer to keep for survivor overflow") \ 2246 \ 2247 product(uintx, ThresholdTolerance, 10, \ 2248 "Allowed collection cost difference between generations") \ 2249 range(0, 100) \ 2250 \ 2251 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2252 "If collection costs are within margin, reduce both by full " \ 2253 "delta") \ 2254 \ 2255 product(uintx, YoungGenerationSizeIncrement, 20, \ 2256 "Adaptive size percentage change in young generation") \ 2257 range(0, 100) \ 2258 \ 2259 product(uintx, YoungGenerationSizeSupplement, 80, \ 2260 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2261 range(0, 100) \ 2262 \ 2263 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2264 "Decay factor to YoungedGenerationSizeSupplement") \ 2265 range(1, max_uintx) \ 2266 \ 2267 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2268 "Adaptive size percentage change in tenured generation") \ 2269 range(0, 100) \ 2270 \ 2271 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2272 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2273 range(0, 100) \ 2274 \ 2275 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2276 "Decay factor to TenuredGenerationSizeIncrement") \ 2277 range(1, max_uintx) \ 2278 \ 2279 product(uintx, MaxGCPauseMillis, max_uintx, \ 2280 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2281 "or (G1 Only) the maximum GC time per MMU time slice") \ 2282 range(1, max_uintx) \ 2283 constraint(MaxGCPauseMillisConstraintFunc,AfterMemoryInit) \ 2284 \ 2285 product(uintx, GCPauseIntervalMillis, 0, \ 2286 "Time slice for MMU specification") \ 2287 constraint(GCPauseIntervalMillisConstraintFunc,AfterMemoryInit) \ 2288 \ 2289 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2290 "Adaptive size policy maximum GC minor pause time goal " \ 2291 "in millisecond") \ 2292 \ 2293 product(uintx, GCTimeRatio, 99, \ 2294 "Adaptive size policy application time to GC time ratio") \ 2295 \ 2296 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2297 "Adaptive size scale down factor for shrinking") \ 2298 range(1, max_uintx) \ 2299 \ 2300 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2301 "Adaptive size decays the major cost for long major intervals") \ 2302 \ 2303 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2304 "Time scale over which major costs decay") \ 2305 \ 2306 product(uintx, MinSurvivorRatio, 3, \ 2307 "Minimum ratio of young generation/survivor space size") \ 2308 range(3, max_uintx) \ 2309 \ 2310 product(uintx, InitialSurvivorRatio, 8, \ 2311 "Initial ratio of young generation/survivor space size") \ 2312 \ 2313 product(size_t, BaseFootPrintEstimate, 256*M, \ 2314 "Estimate of footprint other than Java Heap") \ 2315 \ 2316 product(bool, UseGCOverheadLimit, true, \ 2317 "Use policy to limit of proportion of time spent in GC " \ 2318 "before an OutOfMemory error is thrown") \ 2319 \ 2320 product(uintx, GCTimeLimit, 98, \ 2321 "Limit of the proportion of time spent in GC before " \ 2322 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2323 range(0, 100) \ 2324 \ 2325 product(uintx, GCHeapFreeLimit, 2, \ 2326 "Minimum percentage of free space after a full GC before an " \ 2327 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2328 range(0, 100) \ 2329 \ 2330 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2331 "Number of consecutive collections before gc time limit fires") \ 2332 range(1, max_uintx) \ 2333 \ 2334 product(bool, PrintAdaptiveSizePolicy, false, \ 2335 "Print information about AdaptiveSizePolicy") \ 2336 \ 2337 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2338 "How far ahead to prefetch destination area (<= 0 means off)") \ 2339 \ 2340 product(intx, PrefetchScanIntervalInBytes, -1, \ 2341 "How far ahead to prefetch scan area (<= 0 means off)") \ 2342 \ 2343 product(intx, PrefetchFieldsAhead, -1, \ 2344 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2345 \ 2346 diagnostic(bool, VerifySilently, false, \ 2347 "Do not print the verification progress") \ 2348 \ 2349 diagnostic(bool, VerifyDuringStartup, false, \ 2350 "Verify memory system before executing any Java code " \ 2351 "during VM initialization") \ 2352 \ 2353 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2354 "Verify system before exiting") \ 2355 \ 2356 diagnostic(bool, VerifyBeforeGC, false, \ 2357 "Verify memory system before GC") \ 2358 \ 2359 diagnostic(bool, VerifyAfterGC, false, \ 2360 "Verify memory system after GC") \ 2361 \ 2362 diagnostic(bool, VerifyDuringGC, false, \ 2363 "Verify memory system during GC (between phases)") \ 2364 \ 2365 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2366 "Enable parallel memory system verification") \ 2367 \ 2368 diagnostic(bool, DeferInitialCardMark, false, \ 2369 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2370 "may arise from new_pre_store_barrier") \ 2371 \ 2372 product(bool, UseCondCardMark, false, \ 2373 "Check for already marked card before updating card table") \ 2374 \ 2375 diagnostic(bool, VerifyRememberedSets, false, \ 2376 "Verify GC remembered sets") \ 2377 \ 2378 diagnostic(bool, VerifyObjectStartArray, true, \ 2379 "Verify GC object start array if verify before/after") \ 2380 \ 2381 product(bool, DisableExplicitGC, false, \ 2382 "Ignore calls to System.gc()") \ 2383 \ 2384 notproduct(bool, CheckMemoryInitialization, false, \ 2385 "Check memory initialization") \ 2386 \ 2387 diagnostic(bool, BindCMSThreadToCPU, false, \ 2388 "Bind CMS Thread to CPU if possible") \ 2389 \ 2390 diagnostic(uintx, CPUForCMSThread, 0, \ 2391 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2392 \ 2393 product(bool, BindGCTaskThreadsToCPUs, false, \ 2394 "Bind GCTaskThreads to CPUs if possible") \ 2395 \ 2396 product(bool, UseGCTaskAffinity, false, \ 2397 "Use worker affinity when asking for GCTasks") \ 2398 \ 2399 product(uintx, ProcessDistributionStride, 4, \ 2400 "Stride through processors when distributing processes") \ 2401 \ 2402 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2403 "Number of times the coordinator GC thread will sleep while " \ 2404 "yielding before giving up and resuming GC") \ 2405 \ 2406 product(uintx, CMSYieldSleepCount, 0, \ 2407 "Number of times a GC thread (minus the coordinator) " \ 2408 "will sleep while yielding before giving up and resuming GC") \ 2409 \ 2410 /* gc tracing */ \ 2411 manageable(bool, PrintGC, false, \ 2412 "Print message at garbage collection") \ 2413 \ 2414 manageable(bool, PrintGCDetails, false, \ 2415 "Print more details at garbage collection") \ 2416 \ 2417 manageable(bool, PrintGCDateStamps, false, \ 2418 "Print date stamps at garbage collection") \ 2419 \ 2420 manageable(bool, PrintGCTimeStamps, false, \ 2421 "Print timestamps at garbage collection") \ 2422 \ 2423 manageable(bool, PrintGCID, true, \ 2424 "Print an identifier for each garbage collection") \ 2425 \ 2426 product(bool, PrintGCTaskTimeStamps, false, \ 2427 "Print timestamps for individual gc worker thread tasks") \ 2428 \ 2429 develop(intx, ConcGCYieldTimeout, 0, \ 2430 "If non-zero, assert that GC threads yield within this " \ 2431 "number of milliseconds") \ 2432 range(0, max_intx) \ 2433 \ 2434 product(bool, PrintReferenceGC, false, \ 2435 "Print times spent handling reference objects during GC " \ 2436 "(enabled only when PrintGCDetails)") \ 2437 \ 2438 develop(bool, TraceReferenceGC, false, \ 2439 "Trace handling of soft/weak/final/phantom references") \ 2440 \ 2441 develop(bool, TraceFinalizerRegistration, false, \ 2442 "Trace registration of final references") \ 2443 \ 2444 notproduct(bool, TraceScavenge, false, \ 2445 "Trace scavenge") \ 2446 \ 2447 product(bool, IgnoreEmptyClassPaths, false, \ 2448 "Ignore empty path elements in -classpath") \ 2449 \ 2450 product(bool, TraceClassPaths, false, \ 2451 "Trace processing of class paths") \ 2452 \ 2453 product_rw(bool, TraceClassLoading, false, \ 2454 "Trace all classes loaded") \ 2455 \ 2456 product(bool, TraceClassLoadingPreorder, false, \ 2457 "Trace all classes loaded in order referenced (not loaded)") \ 2458 \ 2459 product_rw(bool, TraceClassUnloading, false, \ 2460 "Trace unloading of classes") \ 2461 \ 2462 product_rw(bool, TraceLoaderConstraints, false, \ 2463 "Trace loader constraints") \ 2464 \ 2465 develop(bool, TraceClassLoaderData, false, \ 2466 "Trace class loader loader_data lifetime") \ 2467 \ 2468 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2469 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2470 "Initial size of the boot class loader data metaspace") \ 2471 range(30*K, max_uintx/BytesPerWord) \ 2472 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 2473 \ 2474 product(bool, TraceYoungGenTime, false, \ 2475 "Trace accumulated time for young collection") \ 2476 \ 2477 product(bool, TraceOldGenTime, false, \ 2478 "Trace accumulated time for old collection") \ 2479 \ 2480 product(bool, PrintTenuringDistribution, false, \ 2481 "Print tenuring age information") \ 2482 \ 2483 product_rw(bool, PrintHeapAtGC, false, \ 2484 "Print heap layout before and after each GC") \ 2485 \ 2486 product_rw(bool, PrintHeapAtGCExtended, false, \ 2487 "Print extended information about the layout of the heap " \ 2488 "when -XX:+PrintHeapAtGC is set") \ 2489 \ 2490 product(bool, PrintHeapAtSIGBREAK, true, \ 2491 "Print heap layout in response to SIGBREAK") \ 2492 \ 2493 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2494 "Print a class histogram before any major stop-world GC") \ 2495 \ 2496 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2497 "Print a class histogram after any major stop-world GC") \ 2498 \ 2499 manageable(bool, PrintClassHistogram, false, \ 2500 "Print a histogram of class instances") \ 2501 \ 2502 develop(bool, TraceWorkGang, false, \ 2503 "Trace activities of work gangs") \ 2504 \ 2505 develop(bool, TraceBlockOffsetTable, false, \ 2506 "Print BlockOffsetTable maps") \ 2507 \ 2508 develop(bool, TraceCardTableModRefBS, false, \ 2509 "Print CardTableModRefBS maps") \ 2510 \ 2511 develop(bool, TraceGCTaskManager, false, \ 2512 "Trace actions of the GC task manager") \ 2513 \ 2514 develop(bool, TraceGCTaskQueue, false, \ 2515 "Trace actions of the GC task queues") \ 2516 \ 2517 diagnostic(bool, TraceGCTaskThread, false, \ 2518 "Trace actions of the GC task threads") \ 2519 \ 2520 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2521 "Print the time taken by each phase in ParallelOldGC " \ 2522 "(PrintGCDetails must also be enabled)") \ 2523 \ 2524 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2525 "Trace marking phase in ParallelOldGC") \ 2526 \ 2527 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2528 "Trace summary phase in ParallelOldGC") \ 2529 \ 2530 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2531 "Trace compaction phase in ParallelOldGC") \ 2532 \ 2533 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2534 "Trace dense prefix computation for ParallelOldGC") \ 2535 \ 2536 develop(bool, IgnoreLibthreadGPFault, false, \ 2537 "Suppress workaround for libthread GP fault") \ 2538 \ 2539 product(bool, PrintJNIGCStalls, false, \ 2540 "Print diagnostic message when GC is stalled " \ 2541 "by JNI critical section") \ 2542 \ 2543 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2544 "The percentage of the used heap that the instances of a class " \ 2545 "must occupy for the class to generate a trace event") \ 2546 range(0.0, 100.0) \ 2547 \ 2548 /* GC log rotation setting */ \ 2549 \ 2550 product(bool, UseGCLogFileRotation, false, \ 2551 "Rotate gclog files (for long running applications). It requires "\ 2552 "-Xloggc:<filename>") \ 2553 \ 2554 product(uintx, NumberOfGCLogFiles, 0, \ 2555 "Number of gclog files in rotation " \ 2556 "(default: 0, no rotation)") \ 2557 \ 2558 product(size_t, GCLogFileSize, 8*K, \ 2559 "GC log file size, requires UseGCLogFileRotation. " \ 2560 "Set to 0 to only trigger rotation via jcmd") \ 2561 \ 2562 /* JVMTI heap profiling */ \ 2563 \ 2564 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2565 "Trace JVMTI object tagging calls") \ 2566 \ 2567 diagnostic(bool, VerifyBeforeIteration, false, \ 2568 "Verify memory system before JVMTI iteration") \ 2569 \ 2570 /* compiler interface */ \ 2571 \ 2572 develop(bool, CIPrintCompilerName, false, \ 2573 "when CIPrint is active, print the name of the active compiler") \ 2574 \ 2575 diagnostic(bool, CIPrintCompileQueue, false, \ 2576 "display the contents of the compile queue whenever a " \ 2577 "compilation is enqueued") \ 2578 \ 2579 develop(bool, CIPrintRequests, false, \ 2580 "display every request for compilation") \ 2581 \ 2582 product(bool, CITime, false, \ 2583 "collect timing information for compilation") \ 2584 \ 2585 develop(bool, CITimeVerbose, false, \ 2586 "be more verbose in compilation timings") \ 2587 \ 2588 develop(bool, CITimeEach, false, \ 2589 "display timing information after each successful compilation") \ 2590 \ 2591 develop(bool, CICountOSR, false, \ 2592 "use a separate counter when assigning ids to osr compilations") \ 2593 \ 2594 develop(bool, CICompileNatives, true, \ 2595 "compile native methods if supported by the compiler") \ 2596 \ 2597 develop_pd(bool, CICompileOSR, \ 2598 "compile on stack replacement methods if supported by the " \ 2599 "compiler") \ 2600 \ 2601 develop(bool, CIPrintMethodCodes, false, \ 2602 "print method bytecodes of the compiled code") \ 2603 \ 2604 develop(bool, CIPrintTypeFlow, false, \ 2605 "print the results of ciTypeFlow analysis") \ 2606 \ 2607 develop(bool, CITraceTypeFlow, false, \ 2608 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2609 \ 2610 develop(intx, OSROnlyBCI, -1, \ 2611 "OSR only at this bci. Negative values mean exclude that bci") \ 2612 \ 2613 /* compiler */ \ 2614 \ 2615 /* notice: the max range value here is max_jint, not max_intx */ \ 2616 /* because of overflow issue */ \ 2617 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2618 "Number of compiler threads to run") \ 2619 range(0, max_jint) \ 2620 constraint(CICompilerCountConstraintFunc, AtParse) \ 2621 \ 2622 product(intx, CompilationPolicyChoice, 0, \ 2623 "which compilation policy (0-3)") \ 2624 range(0, 3) \ 2625 \ 2626 develop(bool, UseStackBanging, true, \ 2627 "use stack banging for stack overflow checks (required for " \ 2628 "proper StackOverflow handling; disable only to measure cost " \ 2629 "of stackbanging)") \ 2630 \ 2631 develop(bool, UseStrictFP, true, \ 2632 "use strict fp if modifier strictfp is set") \ 2633 \ 2634 develop(bool, GenerateSynchronizationCode, true, \ 2635 "generate locking/unlocking code for synchronized methods and " \ 2636 "monitors") \ 2637 \ 2638 develop(bool, GenerateCompilerNullChecks, true, \ 2639 "Generate explicit null checks for loads/stores/calls") \ 2640 \ 2641 develop(bool, GenerateRangeChecks, true, \ 2642 "Generate range checks for array accesses") \ 2643 \ 2644 develop_pd(bool, ImplicitNullChecks, \ 2645 "Generate code for implicit null checks") \ 2646 \ 2647 product_pd(bool, TrapBasedNullChecks, \ 2648 "Generate code for null checks that uses a cmp and trap " \ 2649 "instruction raising SIGTRAP. This is only used if an access to" \ 2650 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2651 "ImplicitNullChecks don't work (PPC64).") \ 2652 \ 2653 product(bool, PrintSafepointStatistics, false, \ 2654 "Print statistics about safepoint synchronization") \ 2655 \ 2656 product(intx, PrintSafepointStatisticsCount, 300, \ 2657 "Total number of safepoint statistics collected " \ 2658 "before printing them out") \ 2659 range(1, max_intx) \ 2660 \ 2661 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2662 "Print safepoint statistics only when safepoint takes " \ 2663 "more than PrintSafepointSatisticsTimeout in millis") \ 2664 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 2665 NOT_LP64(range(-1, max_intx)) \ 2666 \ 2667 product(bool, TraceSafepointCleanupTime, false, \ 2668 "Print the break down of clean up tasks performed during " \ 2669 "safepoint") \ 2670 \ 2671 product(bool, Inline, true, \ 2672 "Enable inlining") \ 2673 \ 2674 product(bool, ClipInlining, true, \ 2675 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2676 \ 2677 develop(bool, UseCHA, true, \ 2678 "Enable CHA") \ 2679 \ 2680 product(bool, UseTypeProfile, true, \ 2681 "Check interpreter profile for historically monomorphic calls") \ 2682 \ 2683 diagnostic(bool, PrintInlining, false, \ 2684 "Print inlining optimizations") \ 2685 \ 2686 product(bool, UsePopCountInstruction, false, \ 2687 "Use population count instruction") \ 2688 \ 2689 develop(bool, EagerInitialization, false, \ 2690 "Eagerly initialize classes if possible") \ 2691 \ 2692 diagnostic(bool, LogTouchedMethods, false, \ 2693 "Log methods which have been ever touched in runtime") \ 2694 \ 2695 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 2696 "Print all methods that have been ever touched in runtime") \ 2697 \ 2698 develop(bool, TraceMethodReplacement, false, \ 2699 "Print when methods are replaced do to recompilation") \ 2700 \ 2701 develop(bool, PrintMethodFlushing, false, \ 2702 "Print the nmethods being flushed") \ 2703 \ 2704 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2705 "print statistics about method flushing") \ 2706 \ 2707 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2708 "Number of compiled code invocations after which " \ 2709 "the method is considered as hot by the flusher") \ 2710 range(1, max_jint) \ 2711 \ 2712 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2713 "Minimum number of sweeper passes before an nmethod " \ 2714 "can be flushed") \ 2715 range(0, max_intx) \ 2716 \ 2717 product(bool, UseCodeAging, true, \ 2718 "Insert counter to detect warm methods") \ 2719 \ 2720 diagnostic(bool, StressCodeAging, false, \ 2721 "Start with counters compiled in") \ 2722 \ 2723 develop(bool, UseRelocIndex, false, \ 2724 "Use an index to speed random access to relocations") \ 2725 \ 2726 develop(bool, StressCodeBuffers, false, \ 2727 "Exercise code buffer expansion and other rare state changes") \ 2728 \ 2729 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2730 "Generate extra debugging information for non-safepoints in " \ 2731 "nmethods") \ 2732 \ 2733 product(bool, PrintVMOptions, false, \ 2734 "Print flags that appeared on the command line") \ 2735 \ 2736 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2737 "Ignore unrecognized VM options") \ 2738 \ 2739 product(bool, PrintCommandLineFlags, false, \ 2740 "Print flags specified on command line or set by ergonomics") \ 2741 \ 2742 product(bool, PrintFlagsInitial, false, \ 2743 "Print all VM flags before argument processing and exit VM") \ 2744 \ 2745 product(bool, PrintFlagsFinal, false, \ 2746 "Print all VM flags after argument and ergonomic processing") \ 2747 \ 2748 notproduct(bool, PrintFlagsWithComments, false, \ 2749 "Print all VM flags with default values and descriptions and " \ 2750 "exit") \ 2751 \ 2752 product(bool, PrintFlagsRanges, false, \ 2753 "Print VM flags and their ranges and exit VM") \ 2754 \ 2755 diagnostic(bool, SerializeVMOutput, true, \ 2756 "Use a mutex to serialize output to tty and LogFile") \ 2757 \ 2758 diagnostic(bool, DisplayVMOutput, true, \ 2759 "Display all VM output on the tty, independently of LogVMOutput") \ 2760 \ 2761 diagnostic(bool, LogVMOutput, false, \ 2762 "Save VM output to LogFile") \ 2763 \ 2764 diagnostic(ccstr, LogFile, NULL, \ 2765 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2766 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2767 \ 2768 product(ccstr, ErrorFile, NULL, \ 2769 "If an error occurs, save the error data to this file " \ 2770 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2771 \ 2772 product(bool, DisplayVMOutputToStderr, false, \ 2773 "If DisplayVMOutput is true, display all VM output to stderr") \ 2774 \ 2775 product(bool, DisplayVMOutputToStdout, false, \ 2776 "If DisplayVMOutput is true, display all VM output to stdout") \ 2777 \ 2778 product(bool, UseHeavyMonitors, false, \ 2779 "use heavyweight instead of lightweight Java monitors") \ 2780 \ 2781 product(bool, PrintStringTableStatistics, false, \ 2782 "print statistics about the StringTable and SymbolTable") \ 2783 \ 2784 diagnostic(bool, VerifyStringTableAtExit, false, \ 2785 "verify StringTable contents at exit") \ 2786 \ 2787 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2788 "print histogram of the symbol table") \ 2789 \ 2790 notproduct(bool, ExitVMOnVerifyError, false, \ 2791 "standard exit from VM if bytecode verify error " \ 2792 "(only in debug mode)") \ 2793 \ 2794 diagnostic(ccstr, AbortVMOnException, NULL, \ 2795 "Call fatal if this exception is thrown. Example: " \ 2796 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2797 \ 2798 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 2799 "Call fatal if the exception pointed by AbortVMOnException " \ 2800 "has this message") \ 2801 \ 2802 develop(bool, DebugVtables, false, \ 2803 "add debugging code to vtable dispatch") \ 2804 \ 2805 develop(bool, PrintVtables, false, \ 2806 "print vtables when printing klass") \ 2807 \ 2808 notproduct(bool, PrintVtableStats, false, \ 2809 "print vtables stats at end of run") \ 2810 \ 2811 develop(bool, TraceCreateZombies, false, \ 2812 "trace creation of zombie nmethods") \ 2813 \ 2814 notproduct(bool, IgnoreLockingAssertions, false, \ 2815 "disable locking assertions (for speed)") \ 2816 \ 2817 product(bool, RangeCheckElimination, true, \ 2818 "Eliminate range checks") \ 2819 \ 2820 develop_pd(bool, UncommonNullCast, \ 2821 "track occurrences of null in casts; adjust compiler tactics") \ 2822 \ 2823 develop(bool, TypeProfileCasts, true, \ 2824 "treat casts like calls for purposes of type profiling") \ 2825 \ 2826 develop(bool, DelayCompilationDuringStartup, true, \ 2827 "Delay invoking the compiler until main application class is " \ 2828 "loaded") \ 2829 \ 2830 develop(bool, CompileTheWorld, false, \ 2831 "Compile all methods in all classes in bootstrap class path " \ 2832 "(stress test)") \ 2833 \ 2834 develop(bool, CompileTheWorldPreloadClasses, true, \ 2835 "Preload all classes used by a class before start loading") \ 2836 \ 2837 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2838 "Force a safepoint every n compiles so sweeper can keep up") \ 2839 \ 2840 develop(bool, FillDelaySlots, true, \ 2841 "Fill delay slots (on SPARC only)") \ 2842 \ 2843 develop(bool, TimeLivenessAnalysis, false, \ 2844 "Time computation of bytecode liveness analysis") \ 2845 \ 2846 develop(bool, TraceLivenessGen, false, \ 2847 "Trace the generation of liveness analysis information") \ 2848 \ 2849 notproduct(bool, TraceLivenessQuery, false, \ 2850 "Trace queries of liveness analysis information") \ 2851 \ 2852 notproduct(bool, CollectIndexSetStatistics, false, \ 2853 "Collect information about IndexSets") \ 2854 \ 2855 develop(bool, UseLoopSafepoints, true, \ 2856 "Generate Safepoint nodes in every loop") \ 2857 \ 2858 develop(intx, FastAllocateSizeLimit, 128*K, \ 2859 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2860 "Inline allocations larger than this in doublewords must go slow")\ 2861 \ 2862 product(bool, AggressiveOpts, false, \ 2863 "Enable aggressive optimizations - see arguments.cpp") \ 2864 \ 2865 product_pd(bool, CompactStrings, \ 2866 "Enable Strings to use single byte chars in backing store") \ 2867 \ 2868 product_pd(uintx, TypeProfileLevel, \ 2869 "=XYZ, with Z: Type profiling of arguments at call; " \ 2870 "Y: Type profiling of return value at call; " \ 2871 "X: Type profiling of parameters to methods; " \ 2872 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2873 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 2874 \ 2875 product(intx, TypeProfileArgsLimit, 2, \ 2876 "max number of call arguments to consider for type profiling") \ 2877 range(0, 16) \ 2878 \ 2879 product(intx, TypeProfileParmsLimit, 2, \ 2880 "max number of incoming parameters to consider for type profiling"\ 2881 ", -1 for all") \ 2882 range(-1, 64) \ 2883 \ 2884 /* statistics */ \ 2885 develop(bool, CountCompiledCalls, false, \ 2886 "Count method invocations") \ 2887 \ 2888 notproduct(bool, CountRuntimeCalls, false, \ 2889 "Count VM runtime calls") \ 2890 \ 2891 develop(bool, CountJNICalls, false, \ 2892 "Count jni method invocations") \ 2893 \ 2894 notproduct(bool, CountJVMCalls, false, \ 2895 "Count jvm method invocations") \ 2896 \ 2897 notproduct(bool, CountRemovableExceptions, false, \ 2898 "Count exceptions that could be replaced by branches due to " \ 2899 "inlining") \ 2900 \ 2901 notproduct(bool, ICMissHistogram, false, \ 2902 "Produce histogram of IC misses") \ 2903 \ 2904 /* interpreter */ \ 2905 develop(bool, ClearInterpreterLocals, false, \ 2906 "Always clear local variables of interpreter activations upon " \ 2907 "entry") \ 2908 \ 2909 product_pd(bool, RewriteBytecodes, \ 2910 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2911 \ 2912 product_pd(bool, RewriteFrequentPairs, \ 2913 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2914 \ 2915 diagnostic(bool, PrintInterpreter, false, \ 2916 "Print the generated interpreter code") \ 2917 \ 2918 product(bool, UseInterpreter, true, \ 2919 "Use interpreter for non-compiled methods") \ 2920 \ 2921 develop(bool, UseFastSignatureHandlers, true, \ 2922 "Use fast signature handlers for native calls") \ 2923 \ 2924 product(bool, UseLoopCounter, true, \ 2925 "Increment invocation counter on backward branch") \ 2926 \ 2927 product_pd(bool, UseOnStackReplacement, \ 2928 "Use on stack replacement, calls runtime if invoc. counter " \ 2929 "overflows in loop") \ 2930 \ 2931 notproduct(bool, TraceOnStackReplacement, false, \ 2932 "Trace on stack replacement") \ 2933 \ 2934 product_pd(bool, PreferInterpreterNativeStubs, \ 2935 "Use always interpreter stubs for native methods invoked via " \ 2936 "interpreter") \ 2937 \ 2938 develop(bool, CountBytecodes, false, \ 2939 "Count number of bytecodes executed") \ 2940 \ 2941 develop(bool, PrintBytecodeHistogram, false, \ 2942 "Print histogram of the executed bytecodes") \ 2943 \ 2944 develop(bool, PrintBytecodePairHistogram, false, \ 2945 "Print histogram of the executed bytecode pairs") \ 2946 \ 2947 diagnostic(bool, PrintSignatureHandlers, false, \ 2948 "Print code generated for native method signature handlers") \ 2949 \ 2950 develop(bool, VerifyOops, false, \ 2951 "Do plausibility checks for oops") \ 2952 \ 2953 develop(bool, CheckUnhandledOops, false, \ 2954 "Check for unhandled oops in VM code") \ 2955 \ 2956 develop(bool, VerifyJNIFields, trueInDebug, \ 2957 "Verify jfieldIDs for instance fields") \ 2958 \ 2959 notproduct(bool, VerifyJNIEnvThread, false, \ 2960 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2961 "from JNI") \ 2962 \ 2963 develop(bool, VerifyFPU, false, \ 2964 "Verify FPU state (check for NaN's, etc.)") \ 2965 \ 2966 develop(bool, VerifyThread, false, \ 2967 "Watch the thread register for corruption (SPARC only)") \ 2968 \ 2969 develop(bool, VerifyActivationFrameSize, false, \ 2970 "Verify that activation frame didn't become smaller than its " \ 2971 "minimal size") \ 2972 \ 2973 develop(bool, TraceFrequencyInlining, false, \ 2974 "Trace frequency based inlining") \ 2975 \ 2976 develop_pd(bool, InlineIntrinsics, \ 2977 "Inline intrinsics that can be statically resolved") \ 2978 \ 2979 product_pd(bool, ProfileInterpreter, \ 2980 "Profile at the bytecode level during interpretation") \ 2981 \ 2982 develop(bool, TraceProfileInterpreter, false, \ 2983 "Trace profiling at the bytecode level during interpretation. " \ 2984 "This outputs the profiling information collected to improve " \ 2985 "jit compilation.") \ 2986 \ 2987 develop_pd(bool, ProfileTraps, \ 2988 "Profile deoptimization traps at the bytecode level") \ 2989 \ 2990 product(intx, ProfileMaturityPercentage, 20, \ 2991 "number of method invocations/branches (expressed as % of " \ 2992 "CompileThreshold) before using the method's profile") \ 2993 range(0, 100) \ 2994 \ 2995 diagnostic(bool, PrintMethodData, false, \ 2996 "Print the results of +ProfileInterpreter at end of run") \ 2997 \ 2998 develop(bool, VerifyDataPointer, trueInDebug, \ 2999 "Verify the method data pointer during interpreter profiling") \ 3000 \ 3001 develop(bool, VerifyCompiledCode, false, \ 3002 "Include miscellaneous runtime verifications in nmethod code; " \ 3003 "default off because it disturbs nmethod size heuristics") \ 3004 \ 3005 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 3006 "Manually make GC thread crash then dump java stack trace; " \ 3007 "Test only") \ 3008 \ 3009 /* compilation */ \ 3010 product(bool, UseCompiler, true, \ 3011 "Use Just-In-Time compilation") \ 3012 \ 3013 develop(bool, TraceCompilationPolicy, false, \ 3014 "Trace compilation policy") \ 3015 \ 3016 develop(bool, TimeCompilationPolicy, false, \ 3017 "Time the compilation policy") \ 3018 \ 3019 product(bool, UseCounterDecay, true, \ 3020 "Adjust recompilation counters") \ 3021 \ 3022 develop(intx, CounterHalfLifeTime, 30, \ 3023 "Half-life time of invocation counters (in seconds)") \ 3024 \ 3025 develop(intx, CounterDecayMinIntervalLength, 500, \ 3026 "The minimum interval (in milliseconds) between invocation of " \ 3027 "CounterDecay") \ 3028 \ 3029 product(bool, AlwaysCompileLoopMethods, false, \ 3030 "When using recompilation, never interpret methods " \ 3031 "containing loops") \ 3032 \ 3033 product(bool, DontCompileHugeMethods, true, \ 3034 "Do not compile methods > HugeMethodLimit") \ 3035 \ 3036 /* Bytecode escape analysis estimation. */ \ 3037 product(bool, EstimateArgEscape, true, \ 3038 "Analyze bytecodes to estimate escape state of arguments") \ 3039 \ 3040 product(intx, BCEATraceLevel, 0, \ 3041 "How much tracing to do of bytecode escape analysis estimates " \ 3042 "(0-3)") \ 3043 range(0, 3) \ 3044 \ 3045 product(intx, MaxBCEAEstimateLevel, 5, \ 3046 "Maximum number of nested calls that are analyzed by BC EA") \ 3047 range(0, max_jint) \ 3048 \ 3049 product(intx, MaxBCEAEstimateSize, 150, \ 3050 "Maximum bytecode size of a method to be analyzed by BC EA") \ 3051 range(0, max_jint) \ 3052 \ 3053 product(intx, AllocatePrefetchStyle, 1, \ 3054 "0 = no prefetch, " \ 3055 "1 = prefetch instructions for each allocation, " \ 3056 "2 = use TLAB watermark to gate allocation prefetch, " \ 3057 "3 = use BIS instruction on Sparc for allocation prefetch") \ 3058 range(0, 3) \ 3059 \ 3060 product(intx, AllocatePrefetchDistance, -1, \ 3061 "Distance to prefetch ahead of allocation pointer. " \ 3062 "-1: use system-specific value (automatically determined") \ 3063 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 3064 \ 3065 product(intx, AllocatePrefetchLines, 3, \ 3066 "Number of lines to prefetch ahead of array allocation pointer") \ 3067 range(1, max_jint / 2) \ 3068 \ 3069 product(intx, AllocateInstancePrefetchLines, 1, \ 3070 "Number of lines to prefetch ahead of instance allocation " \ 3071 "pointer") \ 3072 range(1, max_jint / 2) \ 3073 \ 3074 product(intx, AllocatePrefetchStepSize, 16, \ 3075 "Step size in bytes of sequential prefetch instructions") \ 3076 range(1, max_jint) \ 3077 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 3078 \ 3079 product(intx, AllocatePrefetchInstr, 0, \ 3080 "Prefetch instruction to prefetch ahead of allocation pointer") \ 3081 constraint(AllocatePrefetchInstrConstraintFunc, AfterErgo) \ 3082 \ 3083 /* deoptimization */ \ 3084 develop(bool, TraceDeoptimization, false, \ 3085 "Trace deoptimization") \ 3086 \ 3087 develop(bool, PrintDeoptimizationDetails, false, \ 3088 "Print more information about deoptimization") \ 3089 \ 3090 develop(bool, DebugDeoptimization, false, \ 3091 "Tracing various information while debugging deoptimization") \ 3092 \ 3093 product(intx, SelfDestructTimer, 0, \ 3094 "Will cause VM to terminate after a given time (in minutes) " \ 3095 "(0 means off)") \ 3096 range(0, max_intx) \ 3097 \ 3098 product(intx, MaxJavaStackTraceDepth, 1024, \ 3099 "The maximum number of lines in the stack trace for Java " \ 3100 "exceptions (0 means all)") \ 3101 range(0, max_jint/2) \ 3102 \ 3103 develop(bool, TraceStackWalk, false, \ 3104 "Trace stack walking") \ 3105 \ 3106 product(bool, MemberNameInStackFrame, true, \ 3107 "Use MemberName in StackFrame") \ 3108 \ 3109 /* notice: the max range value here is max_jint, not max_intx */ \ 3110 /* because of overflow issue */ \ 3111 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 3112 "Guarantee a safepoint (at least) every so many milliseconds " \ 3113 "(0 means none)")) \ 3114 NOT_EMBEDDED(range(0, max_jint)) \ 3115 \ 3116 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 3117 "Guarantee a safepoint (at least) every so many milliseconds " \ 3118 "(0 means none)")) \ 3119 EMBEDDED_ONLY(range(0, max_jint)) \ 3120 \ 3121 product(intx, SafepointTimeoutDelay, 10000, \ 3122 "Delay in milliseconds for option SafepointTimeout") \ 3123 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 3124 NOT_LP64(range(0, max_intx)) \ 3125 \ 3126 product(intx, NmethodSweepActivity, 10, \ 3127 "Removes cold nmethods from code cache if > 0. Higher values " \ 3128 "result in more aggressive sweeping") \ 3129 range(0, 2000) \ 3130 \ 3131 notproduct(bool, LogSweeper, false, \ 3132 "Keep a ring buffer of sweeper activity") \ 3133 \ 3134 notproduct(intx, SweeperLogEntries, 1024, \ 3135 "Number of records in the ring buffer of sweeper activity") \ 3136 \ 3137 notproduct(intx, MemProfilingInterval, 500, \ 3138 "Time between each invocation of the MemProfiler") \ 3139 \ 3140 develop(intx, MallocCatchPtr, -1, \ 3141 "Hit breakpoint when mallocing/freeing this pointer") \ 3142 \ 3143 notproduct(ccstrlist, SuppressErrorAt, "", \ 3144 "List of assertions (file:line) to muzzle") \ 3145 \ 3146 notproduct(size_t, HandleAllocationLimit, 1024, \ 3147 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 3148 "is used") \ 3149 \ 3150 develop(size_t, TotalHandleAllocationLimit, 1024, \ 3151 "Threshold for total handle allocation when " \ 3152 "+TraceHandleAllocation is used") \ 3153 \ 3154 develop(intx, StackPrintLimit, 100, \ 3155 "number of stack frames to print in VM-level stack dump") \ 3156 \ 3157 notproduct(intx, MaxElementPrintSize, 256, \ 3158 "maximum number of elements to print") \ 3159 \ 3160 notproduct(intx, MaxSubklassPrintSize, 4, \ 3161 "maximum number of subklasses to print when printing klass") \ 3162 \ 3163 product(intx, MaxInlineLevel, 9, \ 3164 "maximum number of nested calls that are inlined") \ 3165 range(0, max_jint) \ 3166 \ 3167 product(intx, MaxRecursiveInlineLevel, 1, \ 3168 "maximum number of nested recursive calls that are inlined") \ 3169 range(0, max_jint) \ 3170 \ 3171 develop(intx, MaxForceInlineLevel, 100, \ 3172 "maximum number of nested calls that are forced for inlining " \ 3173 "(using CompileCommand or marked w/ @ForceInline)") \ 3174 range(0, max_jint) \ 3175 \ 3176 product_pd(intx, InlineSmallCode, \ 3177 "Only inline already compiled methods if their code size is " \ 3178 "less than this") \ 3179 range(0, max_jint) \ 3180 \ 3181 product(intx, MaxInlineSize, 35, \ 3182 "The maximum bytecode size of a method to be inlined") \ 3183 range(0, max_jint) \ 3184 \ 3185 product_pd(intx, FreqInlineSize, \ 3186 "The maximum bytecode size of a frequent method to be inlined") \ 3187 range(0, max_jint) \ 3188 \ 3189 product(intx, MaxTrivialSize, 6, \ 3190 "The maximum bytecode size of a trivial method to be inlined") \ 3191 range(0, max_jint) \ 3192 \ 3193 product(intx, MinInliningThreshold, 250, \ 3194 "The minimum invocation count a method needs to have to be " \ 3195 "inlined") \ 3196 range(0, max_jint) \ 3197 \ 3198 develop(intx, MethodHistogramCutoff, 100, \ 3199 "The cutoff value for method invocation histogram (+CountCalls)") \ 3200 \ 3201 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3202 "Number of interpreted methods to show in profile") \ 3203 \ 3204 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 3205 "Number of compiled methods to show in profile") \ 3206 \ 3207 develop(intx, ProfilerNumberOfStubMethods, 25, \ 3208 "Number of stub methods to show in profile") \ 3209 \ 3210 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3211 "Number of runtime stub nodes to show in profile") \ 3212 \ 3213 product(intx, ProfileIntervalsTicks, 100, \ 3214 "Number of ticks between printing of interval profile " \ 3215 "(+ProfileIntervals)") \ 3216 range(0, max_intx) \ 3217 \ 3218 notproduct(intx, ScavengeALotInterval, 1, \ 3219 "Interval between which scavenge will occur with +ScavengeALot") \ 3220 \ 3221 notproduct(intx, FullGCALotInterval, 1, \ 3222 "Interval between which full gc will occur with +FullGCALot") \ 3223 \ 3224 notproduct(intx, FullGCALotStart, 0, \ 3225 "For which invocation to start FullGCAlot") \ 3226 \ 3227 notproduct(intx, FullGCALotDummies, 32*K, \ 3228 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3229 "to move") \ 3230 \ 3231 develop(intx, DontYieldALotInterval, 10, \ 3232 "Interval between which yields will be dropped (milliseconds)") \ 3233 \ 3234 develop(intx, MinSleepInterval, 1, \ 3235 "Minimum sleep() interval (milliseconds) when " \ 3236 "ConvertSleepToYield is off (used for Solaris)") \ 3237 \ 3238 develop(intx, ProfilerPCTickThreshold, 15, \ 3239 "Number of ticks in a PC buckets to be a hotspot") \ 3240 \ 3241 notproduct(intx, DeoptimizeALotInterval, 5, \ 3242 "Number of exits until DeoptimizeALot kicks in") \ 3243 \ 3244 notproduct(intx, ZombieALotInterval, 5, \ 3245 "Number of exits until ZombieALot kicks in") \ 3246 \ 3247 diagnostic(intx, MallocVerifyInterval, 0, \ 3248 "If non-zero, verify C heap after every N calls to " \ 3249 "malloc/realloc/free") \ 3250 range(0, max_intx) \ 3251 \ 3252 diagnostic(intx, MallocVerifyStart, 0, \ 3253 "If non-zero, start verifying C heap after Nth call to " \ 3254 "malloc/realloc/free") \ 3255 range(0, max_intx) \ 3256 \ 3257 diagnostic(uintx, MallocMaxTestWords, 0, \ 3258 "If non-zero, maximum number of words that malloc/realloc can " \ 3259 "allocate (for testing only)") \ 3260 range(0, max_uintx) \ 3261 \ 3262 product(intx, TypeProfileWidth, 2, \ 3263 "Number of receiver types to record in call/cast profile") \ 3264 range(0, 8) \ 3265 \ 3266 experimental(intx, MethodProfileWidth, 0, \ 3267 "Number of methods to record in call profile") \ 3268 \ 3269 develop(intx, BciProfileWidth, 2, \ 3270 "Number of return bci's to record in ret profile") \ 3271 \ 3272 product(intx, PerMethodRecompilationCutoff, 400, \ 3273 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3274 range(-1, max_intx) \ 3275 \ 3276 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3277 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3278 range(-1, max_intx) \ 3279 \ 3280 product(intx, PerMethodTrapLimit, 100, \ 3281 "Limit on traps (of one kind) in a method (includes inlines)") \ 3282 range(0, max_jint) \ 3283 \ 3284 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3285 "Limit on speculative traps (of one kind) in a method " \ 3286 "(includes inlines)") \ 3287 range(0, max_jint) \ 3288 \ 3289 product(intx, PerBytecodeTrapLimit, 4, \ 3290 "Limit on traps (of one kind) at a particular BCI") \ 3291 range(0, max_jint) \ 3292 \ 3293 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3294 "Extra method data trap entries for speculation") \ 3295 \ 3296 develop(intx, InlineFrequencyRatio, 20, \ 3297 "Ratio of call site execution to caller method invocation") \ 3298 range(0, max_jint) \ 3299 \ 3300 develop_pd(intx, InlineFrequencyCount, \ 3301 "Count of call site execution necessary to trigger frequent " \ 3302 "inlining") \ 3303 range(0, max_jint) \ 3304 \ 3305 develop(intx, InlineThrowCount, 50, \ 3306 "Force inlining of interpreted methods that throw this often") \ 3307 range(0, max_jint) \ 3308 \ 3309 develop(intx, InlineThrowMaxSize, 200, \ 3310 "Force inlining of throwing methods smaller than this") \ 3311 range(0, max_jint) \ 3312 \ 3313 develop(intx, ProfilerNodeSize, 1024, \ 3314 "Size in K to allocate for the Profile Nodes of each thread") \ 3315 range(0, 1024) \ 3316 \ 3317 /* gc parameters */ \ 3318 product(size_t, InitialHeapSize, 0, \ 3319 "Initial heap size (in bytes); zero means use ergonomics") \ 3320 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \ 3321 \ 3322 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3323 "Maximum heap size (in bytes)") \ 3324 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \ 3325 \ 3326 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3327 "Initial tenured generation size (in bytes)") \ 3328 \ 3329 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3330 "Initial new generation size (in bytes)") \ 3331 constraint(NewSizeConstraintFunc,AfterErgo) \ 3332 \ 3333 product(size_t, MaxNewSize, max_uintx, \ 3334 "Maximum new generation size (in bytes), max_uintx means set " \ 3335 "ergonomically") \ 3336 \ 3337 product(size_t, PretenureSizeThreshold, 0, \ 3338 "Maximum size in bytes of objects allocated in DefNew " \ 3339 "generation; zero means no maximum") \ 3340 \ 3341 product(size_t, MinTLABSize, 2*K, \ 3342 "Minimum allowed TLAB size (in bytes)") \ 3343 range(1, max_uintx) \ 3344 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \ 3345 \ 3346 product(size_t, TLABSize, 0, \ 3347 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3348 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \ 3349 \ 3350 product(size_t, YoungPLABSize, 4096, \ 3351 "Size of young gen promotion LAB's (in HeapWords)") \ 3352 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \ 3353 \ 3354 product(size_t, OldPLABSize, 1024, \ 3355 "Size of old gen promotion LAB's (in HeapWords), or Number " \ 3356 "of blocks to attempt to claim when refilling CMS LAB's") \ 3357 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \ 3358 \ 3359 product(uintx, TLABAllocationWeight, 35, \ 3360 "Allocation averaging weight") \ 3361 range(0, 100) \ 3362 \ 3363 /* Limit the lower bound of this flag to 1 as it is used */ \ 3364 /* in a division expression. */ \ 3365 product(uintx, TLABWasteTargetPercent, 1, \ 3366 "Percentage of Eden that can be wasted") \ 3367 range(1, 100) \ 3368 \ 3369 product(uintx, TLABRefillWasteFraction, 64, \ 3370 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3371 range(1, max_uintx) \ 3372 \ 3373 product(uintx, TLABWasteIncrement, 4, \ 3374 "Increment allowed waste at slow allocation") \ 3375 \ 3376 product(uintx, SurvivorRatio, 8, \ 3377 "Ratio of eden/survivor space size") \ 3378 range(1, max_uintx-2) \ 3379 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \ 3380 \ 3381 product(uintx, NewRatio, 2, \ 3382 "Ratio of old/new generation sizes") \ 3383 range(0, max_uintx-1) \ 3384 \ 3385 product_pd(size_t, NewSizeThreadIncrease, \ 3386 "Additional size added to desired new generation size per " \ 3387 "non-daemon thread (in bytes)") \ 3388 \ 3389 product_pd(size_t, MetaspaceSize, \ 3390 "Initial size of Metaspaces (in bytes)") \ 3391 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 3392 \ 3393 product(size_t, MaxMetaspaceSize, max_uintx, \ 3394 "Maximum size of Metaspaces (in bytes)") \ 3395 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 3396 \ 3397 product(size_t, CompressedClassSpaceSize, 1*G, \ 3398 "Maximum size of class area in Metaspace when compressed " \ 3399 "class pointers are used") \ 3400 range(1*M, 3*G) \ 3401 \ 3402 manageable(uintx, MinHeapFreeRatio, 40, \ 3403 "The minimum percentage of heap free after GC to avoid expansion."\ 3404 " For most GCs this applies to the old generation. In G1 and" \ 3405 " ParallelGC it applies to the whole heap.") \ 3406 range(0, 100) \ 3407 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 3408 \ 3409 manageable(uintx, MaxHeapFreeRatio, 70, \ 3410 "The maximum percentage of heap free after GC to avoid shrinking."\ 3411 " For most GCs this applies to the old generation. In G1 and" \ 3412 " ParallelGC it applies to the whole heap.") \ 3413 range(0, 100) \ 3414 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 3415 \ 3416 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3417 "Number of milliseconds per MB of free space in the heap") \ 3418 range(0, max_intx) \ 3419 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 3420 \ 3421 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3422 "The minimum change in heap space due to GC (in bytes)") \ 3423 \ 3424 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3425 "The minimum expansion of Metaspace (in bytes)") \ 3426 \ 3427 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3428 "The maximum percentage of Metaspace free after GC to avoid " \ 3429 "shrinking") \ 3430 range(0, 100) \ 3431 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3432 \ 3433 product(uintx, MinMetaspaceFreeRatio, 40, \ 3434 "The minimum percentage of Metaspace free after GC to avoid " \ 3435 "expansion") \ 3436 range(0, 99) \ 3437 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3438 \ 3439 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3440 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3441 \ 3442 product(uintx, QueuedAllocationWarningCount, 0, \ 3443 "Number of times an allocation that queues behind a GC " \ 3444 "will retry before printing a warning") \ 3445 \ 3446 diagnostic(uintx, VerifyGCStartAt, 0, \ 3447 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3448 \ 3449 diagnostic(intx, VerifyGCLevel, 0, \ 3450 "Generation level at which to start +VerifyBefore/AfterGC") \ 3451 range(0, 1) \ 3452 \ 3453 product(uintx, MaxTenuringThreshold, 15, \ 3454 "Maximum value for tenuring threshold") \ 3455 range(0, markOopDesc::max_age + 1) \ 3456 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \ 3457 \ 3458 product(uintx, InitialTenuringThreshold, 7, \ 3459 "Initial value for tenuring threshold") \ 3460 range(0, markOopDesc::max_age + 1) \ 3461 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \ 3462 \ 3463 product(uintx, TargetSurvivorRatio, 50, \ 3464 "Desired percentage of survivor space used after scavenge") \ 3465 range(0, 100) \ 3466 \ 3467 product(uintx, MarkSweepDeadRatio, 5, \ 3468 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3469 "Serial mark sweep treats this as both the minimum and maximum " \ 3470 "value. " \ 3471 "CMS uses this value only if it falls back to mark sweep. " \ 3472 "Par compact uses a variable scale based on the density of the " \ 3473 "generation and treats this as the maximum value when the heap " \ 3474 "is either completely full or completely empty. Par compact " \ 3475 "also has a smaller default value; see arguments.cpp.") \ 3476 range(0, 100) \ 3477 \ 3478 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3479 "How often should we fully compact the heap (ignoring the dead " \ 3480 "space parameters)") \ 3481 range(1, max_uintx) \ 3482 \ 3483 product(intx, PrintCMSStatistics, 0, \ 3484 "Statistics for CMS") \ 3485 \ 3486 product(bool, PrintCMSInitiationStatistics, false, \ 3487 "Statistics for initiating a CMS collection") \ 3488 \ 3489 product(intx, PrintFLSStatistics, 0, \ 3490 "Statistics for CMS' FreeListSpace") \ 3491 \ 3492 product(intx, PrintFLSCensus, 0, \ 3493 "Census for CMS' FreeListSpace") \ 3494 \ 3495 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3496 "Delay between expansion and allocation (in milliseconds)") \ 3497 \ 3498 develop(uintx, GCWorkerDelayMillis, 0, \ 3499 "Delay in scheduling GC workers (in milliseconds)") \ 3500 \ 3501 product(intx, DeferThrSuspendLoopCount, 4000, \ 3502 "(Unstable) Number of times to iterate in safepoint loop " \ 3503 "before blocking VM threads ") \ 3504 range(-1, max_jint-1) \ 3505 \ 3506 product(intx, DeferPollingPageLoopCount, -1, \ 3507 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3508 "before changing safepoint polling page to RO ") \ 3509 range(-1, max_jint-1) \ 3510 \ 3511 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3512 range(0, max_intx) \ 3513 \ 3514 product(bool, PSChunkLargeArrays, true, \ 3515 "Process large arrays in chunks") \ 3516 \ 3517 product(uintx, GCDrainStackTargetSize, 64, \ 3518 "Number of entries we will try to leave on the stack " \ 3519 "during parallel gc") \ 3520 \ 3521 /* stack parameters */ \ 3522 product_pd(intx, StackYellowPages, \ 3523 "Number of yellow zone (recoverable overflows) pages") \ 3524 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 3525 \ 3526 product_pd(intx, StackRedPages, \ 3527 "Number of red zone (unrecoverable overflows) pages") \ 3528 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 3529 \ 3530 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3531 product_pd(intx, StackShadowPages, \ 3532 "Number of shadow zone (for overflow checking) pages " \ 3533 "this should exceed the depth of the VM and native call stack") \ 3534 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 3535 \ 3536 product_pd(intx, ThreadStackSize, \ 3537 "Thread Stack Size (in Kbytes)") \ 3538 range(0, max_intx-os::vm_page_size()) \ 3539 \ 3540 product_pd(intx, VMThreadStackSize, \ 3541 "Non-Java Thread Stack Size (in Kbytes)") \ 3542 range(0, max_intx/(1 * K)) \ 3543 \ 3544 product_pd(intx, CompilerThreadStackSize, \ 3545 "Compiler Thread Stack Size (in Kbytes)") \ 3546 range(0, max_intx /(1 * K)) \ 3547 \ 3548 develop_pd(size_t, JVMInvokeMethodSlack, \ 3549 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3550 \ 3551 /* code cache parameters */ \ 3552 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3553 develop(uintx, CodeCacheSegmentSize, \ 3554 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)), \ 3555 "Code cache segment size (in bytes) - smallest unit of " \ 3556 "allocation") \ 3557 range(1, 1024) \ 3558 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 3559 \ 3560 develop_pd(intx, CodeEntryAlignment, \ 3561 "Code entry alignment for generated code (in bytes)") \ 3562 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 3563 \ 3564 product_pd(intx, OptoLoopAlignment, \ 3565 "Align inner loops to zero relative to this modulus") \ 3566 range(1, 16) \ 3567 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 3568 \ 3569 product_pd(uintx, InitialCodeCacheSize, \ 3570 "Initial code cache size (in bytes)") \ 3571 range(0, max_uintx) \ 3572 \ 3573 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3574 "Minimum code cache size (in bytes) required to start VM.") \ 3575 range(0, max_uintx) \ 3576 \ 3577 product(bool, SegmentedCodeCache, false, \ 3578 "Use a segmented code cache") \ 3579 \ 3580 product_pd(uintx, ReservedCodeCacheSize, \ 3581 "Reserved code cache size (in bytes) - maximum code cache size") \ 3582 range(0, max_uintx) \ 3583 \ 3584 product_pd(uintx, NonProfiledCodeHeapSize, \ 3585 "Size of code heap with non-profiled methods (in bytes)") \ 3586 range(0, max_uintx) \ 3587 \ 3588 product_pd(uintx, ProfiledCodeHeapSize, \ 3589 "Size of code heap with profiled methods (in bytes)") \ 3590 range(0, max_uintx) \ 3591 \ 3592 product_pd(uintx, NonNMethodCodeHeapSize, \ 3593 "Size of code heap with non-nmethods (in bytes)") \ 3594 range(0, max_uintx) \ 3595 \ 3596 product_pd(uintx, CodeCacheExpansionSize, \ 3597 "Code cache expansion size (in bytes)") \ 3598 range(0, max_uintx) \ 3599 \ 3600 develop_pd(uintx, CodeCacheMinBlockLength, \ 3601 "Minimum number of segments in a code cache block") \ 3602 range(1, 100) \ 3603 \ 3604 notproduct(bool, ExitOnFullCodeCache, false, \ 3605 "Exit the VM if we fill the code cache") \ 3606 \ 3607 product(bool, UseCodeCacheFlushing, true, \ 3608 "Remove cold/old nmethods from the code cache") \ 3609 \ 3610 product(uintx, StartAggressiveSweepingAt, 10, \ 3611 "Start aggressive sweeping if X[%] of the code cache is free." \ 3612 "Segmented code cache: X[%] of the non-profiled heap." \ 3613 "Non-segmented code cache: X[%] of the total code cache") \ 3614 range(0, 100) \ 3615 \ 3616 /* interpreter debugging */ \ 3617 develop(intx, BinarySwitchThreshold, 5, \ 3618 "Minimal number of lookupswitch entries for rewriting to binary " \ 3619 "switch") \ 3620 \ 3621 develop(intx, StopInterpreterAt, 0, \ 3622 "Stop interpreter execution at specified bytecode number") \ 3623 \ 3624 develop(intx, TraceBytecodesAt, 0, \ 3625 "Trace bytecodes starting with specified bytecode number") \ 3626 \ 3627 /* compiler interface */ \ 3628 develop(intx, CIStart, 0, \ 3629 "The id of the first compilation to permit") \ 3630 \ 3631 develop(intx, CIStop, max_jint, \ 3632 "The id of the last compilation to permit") \ 3633 \ 3634 develop(intx, CIStartOSR, 0, \ 3635 "The id of the first osr compilation to permit " \ 3636 "(CICountOSR must be on)") \ 3637 \ 3638 develop(intx, CIStopOSR, max_jint, \ 3639 "The id of the last osr compilation to permit " \ 3640 "(CICountOSR must be on)") \ 3641 \ 3642 develop(intx, CIBreakAtOSR, -1, \ 3643 "The id of osr compilation to break at") \ 3644 \ 3645 develop(intx, CIBreakAt, -1, \ 3646 "The id of compilation to break at") \ 3647 \ 3648 product(ccstrlist, CompileOnly, "", \ 3649 "List of methods (pkg/class.name) to restrict compilation to") \ 3650 \ 3651 product(ccstr, CompileCommandFile, NULL, \ 3652 "Read compiler commands from this file [.hotspot_compiler]") \ 3653 \ 3654 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 3655 "Read compiler directives from this file") \ 3656 \ 3657 product(ccstrlist, CompileCommand, "", \ 3658 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3659 \ 3660 develop(bool, ReplayCompiles, false, \ 3661 "Enable replay of compilations from ReplayDataFile") \ 3662 \ 3663 product(ccstr, ReplayDataFile, NULL, \ 3664 "File containing compilation replay information" \ 3665 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3666 \ 3667 product(ccstr, InlineDataFile, NULL, \ 3668 "File containing inlining replay information" \ 3669 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3670 \ 3671 develop(intx, ReplaySuppressInitializers, 2, \ 3672 "Control handling of class initialization during replay: " \ 3673 "0 - don't do anything special; " \ 3674 "1 - treat all class initializers as empty; " \ 3675 "2 - treat class initializers for application classes as empty; " \ 3676 "3 - allow all class initializers to run during bootstrap but " \ 3677 " pretend they are empty after starting replay") \ 3678 range(0, 3) \ 3679 \ 3680 develop(bool, ReplayIgnoreInitErrors, false, \ 3681 "Ignore exceptions thrown during initialization for replay") \ 3682 \ 3683 product(bool, DumpReplayDataOnError, true, \ 3684 "Record replay data for crashing compiler threads") \ 3685 \ 3686 product(bool, CICompilerCountPerCPU, false, \ 3687 "1 compiler thread for log(N CPUs)") \ 3688 \ 3689 develop(intx, CIFireOOMAt, -1, \ 3690 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3691 "(non-negative value throws OOM after this many CI accesses " \ 3692 "in each compile)") \ 3693 notproduct(intx, CICrashAt, -1, \ 3694 "id of compilation to trigger assert in compiler thread for " \ 3695 "the purpose of testing, e.g. generation of replay data") \ 3696 notproduct(bool, CIObjectFactoryVerify, false, \ 3697 "enable potentially expensive verification in ciObjectFactory") \ 3698 \ 3699 /* Priorities */ \ 3700 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3701 \ 3702 product(intx, ThreadPriorityPolicy, 0, \ 3703 "0 : Normal. "\ 3704 " VM chooses priorities that are appropriate for normal "\ 3705 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3706 " to normal native priority. Java priorities below " \ 3707 " NORM_PRIORITY map to lower native priority values. On "\ 3708 " Windows applications are allowed to use higher native "\ 3709 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3710 " not use the highest possible native priority, "\ 3711 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3712 " system threads. On Linux thread priorities are ignored "\ 3713 " because the OS does not support static priority in "\ 3714 " SCHED_OTHER scheduling class which is the only choice for "\ 3715 " non-root, non-realtime applications. "\ 3716 "1 : Aggressive. "\ 3717 " Java thread priorities map over to the entire range of "\ 3718 " native thread priorities. Higher Java thread priorities map "\ 3719 " to higher native thread priorities. This policy should be "\ 3720 " used with care, as sometimes it can cause performance "\ 3721 " degradation in the application and/or the entire system. On "\ 3722 " Linux this policy requires root privilege.") \ 3723 range(0, 1) \ 3724 \ 3725 product(bool, ThreadPriorityVerbose, false, \ 3726 "Print priority changes") \ 3727 \ 3728 product(intx, CompilerThreadPriority, -1, \ 3729 "The native priority at which compiler threads should run " \ 3730 "(-1 means no change)") \ 3731 range(min_jint, max_jint) \ 3732 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 3733 \ 3734 product(intx, VMThreadPriority, -1, \ 3735 "The native priority at which the VM thread should run " \ 3736 "(-1 means no change)") \ 3737 range(-1, 127) \ 3738 \ 3739 product(bool, CompilerThreadHintNoPreempt, true, \ 3740 "(Solaris only) Give compiler threads an extra quanta") \ 3741 \ 3742 product(bool, VMThreadHintNoPreempt, false, \ 3743 "(Solaris only) Give VM thread an extra quanta") \ 3744 \ 3745 product(intx, JavaPriority1_To_OSPriority, -1, \ 3746 "Map Java priorities to OS priorities") \ 3747 range(-1, 127) \ 3748 \ 3749 product(intx, JavaPriority2_To_OSPriority, -1, \ 3750 "Map Java priorities to OS priorities") \ 3751 range(-1, 127) \ 3752 \ 3753 product(intx, JavaPriority3_To_OSPriority, -1, \ 3754 "Map Java priorities to OS priorities") \ 3755 range(-1, 127) \ 3756 \ 3757 product(intx, JavaPriority4_To_OSPriority, -1, \ 3758 "Map Java priorities to OS priorities") \ 3759 range(-1, 127) \ 3760 \ 3761 product(intx, JavaPriority5_To_OSPriority, -1, \ 3762 "Map Java priorities to OS priorities") \ 3763 range(-1, 127) \ 3764 \ 3765 product(intx, JavaPriority6_To_OSPriority, -1, \ 3766 "Map Java priorities to OS priorities") \ 3767 range(-1, 127) \ 3768 \ 3769 product(intx, JavaPriority7_To_OSPriority, -1, \ 3770 "Map Java priorities to OS priorities") \ 3771 range(-1, 127) \ 3772 \ 3773 product(intx, JavaPriority8_To_OSPriority, -1, \ 3774 "Map Java priorities to OS priorities") \ 3775 range(-1, 127) \ 3776 \ 3777 product(intx, JavaPriority9_To_OSPriority, -1, \ 3778 "Map Java priorities to OS priorities") \ 3779 range(-1, 127) \ 3780 \ 3781 product(intx, JavaPriority10_To_OSPriority,-1, \ 3782 "Map Java priorities to OS priorities") \ 3783 range(-1, 127) \ 3784 \ 3785 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3786 "Java thread priority 10 maps to critical scheduling priority") \ 3787 \ 3788 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3789 "Compiler thread(s) run at critical scheduling priority") \ 3790 \ 3791 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3792 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3793 \ 3794 /* compiler debugging */ \ 3795 notproduct(intx, CompileTheWorldStartAt, 1, \ 3796 "First class to consider when using +CompileTheWorld") \ 3797 \ 3798 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3799 "Last class to consider when using +CompileTheWorld") \ 3800 \ 3801 develop(intx, NewCodeParameter, 0, \ 3802 "Testing Only: Create a dedicated integer parameter before " \ 3803 "putback") \ 3804 \ 3805 /* new oopmap storage allocation */ \ 3806 develop(intx, MinOopMapAllocation, 8, \ 3807 "Minimum number of OopMap entries in an OopMapSet") \ 3808 \ 3809 /* Background Compilation */ \ 3810 develop(intx, LongCompileThreshold, 50, \ 3811 "Used with +TraceLongCompiles") \ 3812 \ 3813 /* recompilation */ \ 3814 product_pd(intx, CompileThreshold, \ 3815 "number of interpreted method invocations before (re-)compiling") \ 3816 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 3817 \ 3818 product(double, CompileThresholdScaling, 1.0, \ 3819 "Factor to control when first compilation happens " \ 3820 "(both with and without tiered compilation): " \ 3821 "values greater than 1.0 delay counter overflow, " \ 3822 "values between 0 and 1.0 rush counter overflow, " \ 3823 "value of 1.0 leaves compilation thresholds unchanged " \ 3824 "value of 0.0 is equivalent to -Xint. " \ 3825 "" \ 3826 "Flag can be set as per-method option. " \ 3827 "If a value is specified for a method, compilation thresholds " \ 3828 "for that method are scaled by both the value of the global flag "\ 3829 "and the value of the per-method flag.") \ 3830 range(0.0, DBL_MAX) \ 3831 \ 3832 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3833 "Interpreter (tier 0) invocation notification frequency") \ 3834 range(0, 30) \ 3835 \ 3836 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3837 "C1 without MDO (tier 2) invocation notification frequency") \ 3838 range(0, 30) \ 3839 \ 3840 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3841 "C1 with MDO profiling (tier 3) invocation notification " \ 3842 "frequency") \ 3843 range(0, 30) \ 3844 \ 3845 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3846 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3847 range(0, 30) \ 3848 \ 3849 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3850 "Interpreter (tier 0) invocation notification frequency") \ 3851 range(0, 30) \ 3852 \ 3853 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3854 "C1 without MDO (tier 2) invocation notification frequency") \ 3855 range(0, 30) \ 3856 \ 3857 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3858 "C1 with MDO profiling (tier 3) invocation notification " \ 3859 "frequency") \ 3860 range(0, 30) \ 3861 \ 3862 product(intx, Tier2CompileThreshold, 0, \ 3863 "threshold at which tier 2 compilation is invoked") \ 3864 range(0, max_jint) \ 3865 \ 3866 product(intx, Tier2BackEdgeThreshold, 0, \ 3867 "Back edge threshold at which tier 2 compilation is invoked") \ 3868 range(0, max_jint) \ 3869 \ 3870 product(intx, Tier3InvocationThreshold, 200, \ 3871 "Compile if number of method invocations crosses this " \ 3872 "threshold") \ 3873 range(0, max_jint) \ 3874 \ 3875 product(intx, Tier3MinInvocationThreshold, 100, \ 3876 "Minimum invocation to compile at tier 3") \ 3877 range(0, max_jint) \ 3878 \ 3879 product(intx, Tier3CompileThreshold, 2000, \ 3880 "Threshold at which tier 3 compilation is invoked (invocation " \ 3881 "minimum must be satisfied)") \ 3882 range(0, max_jint) \ 3883 \ 3884 product(intx, Tier3BackEdgeThreshold, 60000, \ 3885 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3886 range(0, max_jint) \ 3887 \ 3888 product(intx, Tier4InvocationThreshold, 5000, \ 3889 "Compile if number of method invocations crosses this " \ 3890 "threshold") \ 3891 range(0, max_jint) \ 3892 \ 3893 product(intx, Tier4MinInvocationThreshold, 600, \ 3894 "Minimum invocation to compile at tier 4") \ 3895 range(0, max_jint) \ 3896 \ 3897 product(intx, Tier4CompileThreshold, 15000, \ 3898 "Threshold at which tier 4 compilation is invoked (invocation " \ 3899 "minimum must be satisfied") \ 3900 range(0, max_jint) \ 3901 \ 3902 product(intx, Tier4BackEdgeThreshold, 40000, \ 3903 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3904 range(0, max_jint) \ 3905 \ 3906 product(intx, Tier3DelayOn, 5, \ 3907 "If C2 queue size grows over this amount per compiler thread " \ 3908 "stop compiling at tier 3 and start compiling at tier 2") \ 3909 range(0, max_jint) \ 3910 \ 3911 product(intx, Tier3DelayOff, 2, \ 3912 "If C2 queue size is less than this amount per compiler thread " \ 3913 "allow methods compiled at tier 2 transition to tier 3") \ 3914 range(0, max_jint) \ 3915 \ 3916 product(intx, Tier3LoadFeedback, 5, \ 3917 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3918 "reaches this amount per compiler thread") \ 3919 range(0, max_jint) \ 3920 \ 3921 product(intx, Tier4LoadFeedback, 3, \ 3922 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3923 "reaches this amount per compiler thread") \ 3924 range(0, max_jint) \ 3925 \ 3926 product(intx, TieredCompileTaskTimeout, 50, \ 3927 "Kill compile task if method was not used within " \ 3928 "given timeout in milliseconds") \ 3929 range(0, max_intx) \ 3930 \ 3931 product(intx, TieredStopAtLevel, 4, \ 3932 "Stop at given compilation level") \ 3933 range(0, 4) \ 3934 \ 3935 product(intx, Tier0ProfilingStartPercentage, 200, \ 3936 "Start profiling in interpreter if the counters exceed tier 3 " \ 3937 "thresholds by the specified percentage") \ 3938 range(0, max_jint) \ 3939 \ 3940 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3941 "Increase the compile threshold for C1 compilation if the code " \ 3942 "cache is filled by the specified percentage") \ 3943 range(0, 99) \ 3944 \ 3945 product(intx, TieredRateUpdateMinTime, 1, \ 3946 "Minimum rate sampling interval (in milliseconds)") \ 3947 range(0, max_intx) \ 3948 \ 3949 product(intx, TieredRateUpdateMaxTime, 25, \ 3950 "Maximum rate sampling interval (in milliseconds)") \ 3951 range(0, max_intx) \ 3952 \ 3953 product_pd(bool, TieredCompilation, \ 3954 "Enable tiered compilation") \ 3955 \ 3956 product(bool, PrintTieredEvents, false, \ 3957 "Print tiered events notifications") \ 3958 \ 3959 product_pd(intx, OnStackReplacePercentage, \ 3960 "NON_TIERED number of method invocations/branches (expressed as " \ 3961 "% of CompileThreshold) before (re-)compiling OSR code") \ 3962 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 3963 \ 3964 product(intx, InterpreterProfilePercentage, 33, \ 3965 "NON_TIERED number of method invocations/branches (expressed as " \ 3966 "% of CompileThreshold) before profiling in the interpreter") \ 3967 range(0, 100) \ 3968 \ 3969 develop(intx, MaxRecompilationSearchLength, 10, \ 3970 "The maximum number of frames to inspect when searching for " \ 3971 "recompilee") \ 3972 \ 3973 develop(intx, MaxInterpretedSearchLength, 3, \ 3974 "The maximum number of interpreted frames to skip when searching "\ 3975 "for recompilee") \ 3976 \ 3977 develop(intx, DesiredMethodLimit, 8000, \ 3978 "The desired maximum method size (in bytecodes) after inlining") \ 3979 \ 3980 develop(intx, HugeMethodLimit, 8000, \ 3981 "Don't compile methods larger than this if " \ 3982 "+DontCompileHugeMethods") \ 3983 \ 3984 /* New JDK 1.4 reflection implementation */ \ 3985 \ 3986 develop(intx, FastSuperclassLimit, 8, \ 3987 "Depth of hardwired instanceof accelerator array") \ 3988 \ 3989 /* Properties for Java libraries */ \ 3990 \ 3991 product(size_t, MaxDirectMemorySize, 0, \ 3992 "Maximum total size of NIO direct-buffer allocations") \ 3993 range(0, (size_t)SIZE_MAX) \ 3994 \ 3995 /* Flags used for temporary code during development */ \ 3996 \ 3997 diagnostic(bool, UseNewCode, false, \ 3998 "Testing Only: Use the new version while testing") \ 3999 \ 4000 diagnostic(bool, UseNewCode2, false, \ 4001 "Testing Only: Use the new version while testing") \ 4002 \ 4003 diagnostic(bool, UseNewCode3, false, \ 4004 "Testing Only: Use the new version while testing") \ 4005 \ 4006 /* flags for performance data collection */ \ 4007 \ 4008 product(bool, UsePerfData, falseInEmbedded, \ 4009 "Flag to disable jvmstat instrumentation for performance testing "\ 4010 "and problem isolation purposes") \ 4011 \ 4012 product(bool, PerfDataSaveToFile, false, \ 4013 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 4014 \ 4015 product(ccstr, PerfDataSaveFile, NULL, \ 4016 "Save PerfData memory to the specified absolute pathname. " \ 4017 "The string %p in the file name (if present) " \ 4018 "will be replaced by pid") \ 4019 \ 4020 product(intx, PerfDataSamplingInterval, 50, \ 4021 "Data sampling interval (in milliseconds)") \ 4022 range(PeriodicTask::min_interval, max_jint) \ 4023 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 4024 \ 4025 develop(bool, PerfTraceDataCreation, false, \ 4026 "Trace creation of Performance Data Entries") \ 4027 \ 4028 develop(bool, PerfTraceMemOps, false, \ 4029 "Trace PerfMemory create/attach/detach calls") \ 4030 \ 4031 product(bool, PerfDisableSharedMem, false, \ 4032 "Store performance data in standard memory") \ 4033 \ 4034 product(intx, PerfDataMemorySize, 64*K, \ 4035 "Size of performance data memory region. Will be rounded " \ 4036 "up to a multiple of the native os page size.") \ 4037 range(128, 32*64*K) \ 4038 \ 4039 product(intx, PerfMaxStringConstLength, 1024, \ 4040 "Maximum PerfStringConstant string length before truncation") \ 4041 range(32, 32*K) \ 4042 \ 4043 product(bool, PerfAllowAtExitRegistration, false, \ 4044 "Allow registration of atexit() methods") \ 4045 \ 4046 product(bool, PerfBypassFileSystemCheck, false, \ 4047 "Bypass Win32 file system criteria checks (Windows Only)") \ 4048 \ 4049 product(intx, UnguardOnExecutionViolation, 0, \ 4050 "Unguard page and retry on no-execute fault (Win32 only) " \ 4051 "0=off, 1=conservative, 2=aggressive") \ 4052 range(0, 2) \ 4053 \ 4054 /* Serviceability Support */ \ 4055 \ 4056 product(bool, ManagementServer, false, \ 4057 "Create JMX Management Server") \ 4058 \ 4059 product(bool, DisableAttachMechanism, false, \ 4060 "Disable mechanism that allows tools to attach to this VM") \ 4061 \ 4062 product(bool, StartAttachListener, false, \ 4063 "Always start Attach Listener at VM startup") \ 4064 \ 4065 manageable(bool, PrintConcurrentLocks, false, \ 4066 "Print java.util.concurrent locks in thread dump") \ 4067 \ 4068 product(bool, TransmitErrorReport, false, \ 4069 "Enable error report transmission on erroneous termination") \ 4070 \ 4071 product(ccstr, ErrorReportServer, NULL, \ 4072 "Override built-in error report server address") \ 4073 \ 4074 /* Shared spaces */ \ 4075 \ 4076 product(bool, UseSharedSpaces, true, \ 4077 "Use shared spaces for metadata") \ 4078 \ 4079 product(bool, VerifySharedSpaces, false, \ 4080 "Verify shared spaces (false for default archive, true for " \ 4081 "archive specified by -XX:SharedArchiveFile)") \ 4082 \ 4083 product(bool, RequireSharedSpaces, false, \ 4084 "Require shared spaces for metadata") \ 4085 \ 4086 product(bool, DumpSharedSpaces, false, \ 4087 "Special mode: JVM reads a class list, loads classes, builds " \ 4088 "shared spaces, and dumps the shared spaces to a file to be " \ 4089 "used in future JVM runs") \ 4090 \ 4091 product(bool, PrintSharedSpaces, false, \ 4092 "Print usage of shared spaces") \ 4093 \ 4094 product(bool, PrintSharedArchiveAndExit, false, \ 4095 "Print shared archive file contents") \ 4096 \ 4097 product(bool, PrintSharedDictionary, false, \ 4098 "If PrintSharedArchiveAndExit is true, also print the shared " \ 4099 "dictionary") \ 4100 \ 4101 product(size_t, SharedReadWriteSize, DEFAULT_SHARED_READ_WRITE_SIZE, \ 4102 "Size of read-write space for metadata (in bytes)") \ 4103 range(MIN_SHARED_READ_WRITE_SIZE, MAX_SHARED_READ_WRITE_SIZE) \ 4104 \ 4105 product(size_t, SharedReadOnlySize, DEFAULT_SHARED_READ_ONLY_SIZE, \ 4106 "Size of read-only space for metadata (in bytes)") \ 4107 range(MIN_SHARED_READ_ONLY_SIZE, MAX_SHARED_READ_ONLY_SIZE) \ 4108 \ 4109 product(size_t, SharedMiscDataSize, DEFAULT_SHARED_MISC_DATA_SIZE, \ 4110 "Size of the shared miscellaneous data area (in bytes)") \ 4111 range(MIN_SHARED_MISC_DATA_SIZE, MAX_SHARED_MISC_DATA_SIZE) \ 4112 \ 4113 product(size_t, SharedMiscCodeSize, DEFAULT_SHARED_MISC_CODE_SIZE, \ 4114 "Size of the shared miscellaneous code area (in bytes)") \ 4115 range(MIN_SHARED_MISC_CODE_SIZE, MAX_SHARED_MISC_CODE_SIZE) \ 4116 \ 4117 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 4118 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 4119 "Address to allocate shared memory region for class data") \ 4120 range(0, SIZE_MAX) \ 4121 \ 4122 product(uintx, SharedSymbolTableBucketSize, 4, \ 4123 "Average number of symbols per bucket in shared table") \ 4124 range(2, 246) \ 4125 \ 4126 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 4127 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 4128 "classes. Just exclude them from the shared dictionary.") \ 4129 \ 4130 diagnostic(bool, PrintMethodHandleStubs, false, \ 4131 "Print generated stub code for method handles") \ 4132 \ 4133 develop(bool, TraceMethodHandles, false, \ 4134 "trace internal method handle operations") \ 4135 \ 4136 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4137 "perform extra checks when constructing method handles") \ 4138 \ 4139 diagnostic(bool, ShowHiddenFrames, false, \ 4140 "show method handle implementation frames (usually hidden)") \ 4141 \ 4142 experimental(bool, TrustFinalNonStaticFields, false, \ 4143 "trust final non-static declarations for constant folding") \ 4144 \ 4145 diagnostic(bool, FoldStableValues, true, \ 4146 "Optimize loads from stable fields (marked w/ @Stable)") \ 4147 \ 4148 develop(bool, TraceInvokeDynamic, false, \ 4149 "trace internal invoke dynamic operations") \ 4150 \ 4151 diagnostic(bool, PauseAtStartup, false, \ 4152 "Causes the VM to pause at startup time and wait for the pause " \ 4153 "file to be removed (default: ./vm.paused.<pid>)") \ 4154 \ 4155 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4156 "The file to create and for whose removal to await when pausing " \ 4157 "at startup. (default: ./vm.paused.<pid>)") \ 4158 \ 4159 diagnostic(bool, PauseAtExit, false, \ 4160 "Pause and wait for keypress on exit if a debugger is attached") \ 4161 \ 4162 product(bool, ExtendedDTraceProbes, false, \ 4163 "Enable performance-impacting dtrace probes") \ 4164 \ 4165 product(bool, DTraceMethodProbes, false, \ 4166 "Enable dtrace probes for method-entry and method-exit") \ 4167 \ 4168 product(bool, DTraceAllocProbes, false, \ 4169 "Enable dtrace probes for object allocation") \ 4170 \ 4171 product(bool, DTraceMonitorProbes, false, \ 4172 "Enable dtrace probes for monitor events") \ 4173 \ 4174 product(bool, RelaxAccessControlCheck, false, \ 4175 "Relax the access control checks in the verifier") \ 4176 \ 4177 product(uintx, StringTableSize, defaultStringTableSize, \ 4178 "Number of buckets in the interned String table") \ 4179 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4180 \ 4181 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4182 "Number of buckets in the JVM internal Symbol table") \ 4183 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4184 \ 4185 product(bool, UseStringDeduplication, false, \ 4186 "Use string deduplication") \ 4187 \ 4188 product(bool, PrintStringDeduplicationStatistics, false, \ 4189 "Print string deduplication statistics") \ 4190 \ 4191 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4192 "A string must reach this age (or be promoted to an old region) " \ 4193 "to be considered for deduplication") \ 4194 range(1, markOopDesc::max_age) \ 4195 \ 4196 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4197 "Force table resize every time the table is scanned") \ 4198 \ 4199 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4200 "Force table rehash every time the table is scanned") \ 4201 \ 4202 diagnostic(bool, WhiteBoxAPI, false, \ 4203 "Enable internal testing APIs") \ 4204 \ 4205 product(bool, PrintGCCause, true, \ 4206 "Include GC cause in GC logging") \ 4207 \ 4208 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4209 "Default survivor space alignment in bytes") \ 4210 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 4211 \ 4212 product(bool , AllowNonVirtualCalls, false, \ 4213 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4214 \ 4215 product(ccstr, DumpLoadedClassList, NULL, \ 4216 "Dump the names all loaded classes, that could be stored into " \ 4217 "the CDS archive, in the specified file") \ 4218 \ 4219 product(ccstr, SharedClassListFile, NULL, \ 4220 "Override the default CDS class list") \ 4221 \ 4222 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4223 "Override the default location of the CDS archive file") \ 4224 \ 4225 product(ccstr, ExtraSharedClassListFile, NULL, \ 4226 "Extra classlist for building the CDS archive file") \ 4227 \ 4228 experimental(size_t, ArrayAllocatorMallocLimit, \ 4229 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4230 "Allocation less than this value will be allocated " \ 4231 "using malloc. Larger allocations will use mmap.") \ 4232 \ 4233 experimental(bool, AlwaysAtomicAccesses, false, \ 4234 "Accesses to all variables should always be atomic") \ 4235 \ 4236 product(bool, EnableTracing, false, \ 4237 "Enable event-based tracing") \ 4238 \ 4239 product(bool, UseLockedTracing, false, \ 4240 "Use locked-tracing when doing event-based tracing") \ 4241 \ 4242 diagnostic(bool, UseUnalignedAccesses, false, \ 4243 "Use unaligned memory accesses in Unsafe") \ 4244 \ 4245 product_pd(bool, PreserveFramePointer, \ 4246 "Use the FP register for holding the frame pointer " \ 4247 "and not as a general purpose register.") \ 4248 \ 4249 diagnostic(bool, CheckIntrinsics, true, \ 4250 "When a class C is loaded, check that " \ 4251 "(1) all intrinsics defined by the VM for class C are present "\ 4252 "in the loaded class file and are marked with the " \ 4253 "@HotSpotIntrinsicCandidate annotation, that " \ 4254 "(2) there is an intrinsic registered for all loaded methods " \ 4255 "that are annotated with the @HotSpotIntrinsicCandidate " \ 4256 "annotation, and that " \ 4257 "(3) no orphan methods exist for class C (i.e., methods for " \ 4258 "which the VM declares an intrinsic but that are not declared "\ 4259 "in the loaded class C. " \ 4260 "Check (3) is available only in debug builds.") \ 4261 \ 4262 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 4263 "Disable backwards compatibility for compile commands.") \ 4264 \ 4265 diagnostic(bool, PrintCompilerDirectives, false, \ 4266 "Print compiler directives on installation.") 4267 4268/* 4269 * Macros for factoring of globals 4270 */ 4271 4272// Interface macros 4273#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4274#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4275#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4276#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4277#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4278#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4279#ifdef PRODUCT 4280#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 4281#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 4282#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 4283#else 4284#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4285#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4286#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4287#endif // PRODUCT 4288// Special LP64 flags, product only needed for now. 4289#ifdef _LP64 4290#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4291#else 4292#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4293#endif // _LP64 4294 4295// Implementation macros 4296#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4297#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4298#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4299#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4300#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4301#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4302#ifdef PRODUCT 4303#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 4304#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 4305#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 4306#else 4307#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4308#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4309#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4310#endif // PRODUCT 4311#ifdef _LP64 4312#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4313#else 4314#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4315#endif // _LP64 4316 4317// Only materialize src code for range checking when required, ignore otherwise 4318#define IGNORE_RANGE(a, b) 4319// Only materialize src code for contraint checking when required, ignore otherwise 4320#define IGNORE_CONSTRAINT(func,type) 4321 4322RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4323 DECLARE_PD_DEVELOPER_FLAG, \ 4324 DECLARE_PRODUCT_FLAG, \ 4325 DECLARE_PD_PRODUCT_FLAG, \ 4326 DECLARE_DIAGNOSTIC_FLAG, \ 4327 DECLARE_EXPERIMENTAL_FLAG, \ 4328 DECLARE_NOTPRODUCT_FLAG, \ 4329 DECLARE_MANAGEABLE_FLAG, \ 4330 DECLARE_PRODUCT_RW_FLAG, \ 4331 DECLARE_LP64_PRODUCT_FLAG, \ 4332 IGNORE_RANGE, \ 4333 IGNORE_CONSTRAINT) 4334 4335RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4336 DECLARE_PD_DEVELOPER_FLAG, \ 4337 DECLARE_PRODUCT_FLAG, \ 4338 DECLARE_PD_PRODUCT_FLAG, \ 4339 DECLARE_DIAGNOSTIC_FLAG, \ 4340 DECLARE_NOTPRODUCT_FLAG, \ 4341 IGNORE_RANGE, \ 4342 IGNORE_CONSTRAINT) 4343 4344ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4345 DECLARE_PRODUCT_FLAG, \ 4346 DECLARE_DIAGNOSTIC_FLAG, \ 4347 DECLARE_EXPERIMENTAL_FLAG, \ 4348 DECLARE_NOTPRODUCT_FLAG, \ 4349 IGNORE_RANGE, \ 4350 IGNORE_CONSTRAINT) 4351 4352// Extensions 4353 4354#include "runtime/globals_ext.hpp" 4355 4356#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4357