globals.hpp revision 9776:661e290d36f1
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 product(bool, UseVectorizedMismatchIntrinsic, false, \ 859 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ 860 \ 861 diagnostic(ccstrlist, DisableIntrinsic, "", \ 862 "do not expand intrinsics whose (internal) names appear here") \ 863 \ 864 develop(bool, TraceCallFixup, false, \ 865 "Trace all call fixups") \ 866 \ 867 develop(bool, DeoptimizeALot, false, \ 868 "Deoptimize at every exit from the runtime system") \ 869 \ 870 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 871 "A comma separated list of bcis to deoptimize at") \ 872 \ 873 product(bool, DeoptimizeRandom, false, \ 874 "Deoptimize random frames on random exit from the runtime system")\ 875 \ 876 notproduct(bool, ZombieALot, false, \ 877 "Create zombies (non-entrant) at exit from the runtime system") \ 878 \ 879 product(bool, UnlinkSymbolsALot, false, \ 880 "Unlink unreferenced symbols from the symbol table at safepoints")\ 881 \ 882 notproduct(bool, WalkStackALot, false, \ 883 "Trace stack (no print) at every exit from the runtime system") \ 884 \ 885 product(bool, Debugging, false, \ 886 "Set when executing debug methods in debug.cpp " \ 887 "(to prevent triggering assertions)") \ 888 \ 889 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 890 "Enable strict checks that safepoints cannot happen for threads " \ 891 "that use No_Safepoint_Verifier") \ 892 \ 893 notproduct(bool, VerifyLastFrame, false, \ 894 "Verify oops on last frame on entry to VM") \ 895 \ 896 develop(bool, TraceHandleAllocation, false, \ 897 "Print out warnings when suspiciously many handles are allocated")\ 898 \ 899 product(bool, FailOverToOldVerifier, true, \ 900 "Fail over to old verifier when split verifier fails") \ 901 \ 902 develop(bool, ShowSafepointMsgs, false, \ 903 "Show message about safepoint synchronization") \ 904 \ 905 product(bool, SafepointTimeout, false, \ 906 "Time out and warn or fail after SafepointTimeoutDelay " \ 907 "milliseconds if failed to reach safepoint") \ 908 \ 909 develop(bool, DieOnSafepointTimeout, false, \ 910 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 911 \ 912 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 913 /* typically, at most a few retries are needed */ \ 914 product(intx, SuspendRetryCount, 50, \ 915 "Maximum retry count for an external suspend request") \ 916 range(0, max_intx) \ 917 \ 918 product(intx, SuspendRetryDelay, 5, \ 919 "Milliseconds to delay per retry (* current_retry_count)") \ 920 range(0, max_intx) \ 921 \ 922 product(bool, AssertOnSuspendWaitFailure, false, \ 923 "Assert/Guarantee on external suspend wait failure") \ 924 \ 925 product(bool, TraceSuspendWaitFailures, false, \ 926 "Trace external suspend wait failures") \ 927 \ 928 product(bool, MaxFDLimit, true, \ 929 "Bump the number of file descriptors to maximum in Solaris") \ 930 \ 931 diagnostic(bool, LogEvents, true, \ 932 "Enable the various ring buffer event logs") \ 933 \ 934 diagnostic(uintx, LogEventsBufferEntries, 10, \ 935 "Number of ring buffer event logs") \ 936 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 937 \ 938 product(bool, BytecodeVerificationRemote, true, \ 939 "Enable the Java bytecode verifier for remote classes") \ 940 \ 941 product(bool, BytecodeVerificationLocal, false, \ 942 "Enable the Java bytecode verifier for local classes") \ 943 \ 944 develop(bool, ForceFloatExceptions, trueInDebug, \ 945 "Force exceptions on FP stack under/overflow") \ 946 \ 947 develop(bool, VerifyStackAtCalls, false, \ 948 "Verify that the stack pointer is unchanged after calls") \ 949 \ 950 develop(bool, TraceJavaAssertions, false, \ 951 "Trace java language assertions") \ 952 \ 953 notproduct(bool, CheckAssertionStatusDirectives, false, \ 954 "Temporary - see javaClasses.cpp") \ 955 \ 956 notproduct(bool, PrintMallocFree, false, \ 957 "Trace calls to C heap malloc/free allocation") \ 958 \ 959 product(bool, PrintOopAddress, false, \ 960 "Always print the location of the oop") \ 961 \ 962 notproduct(bool, VerifyCodeCache, false, \ 963 "Verify code cache on memory allocation/deallocation") \ 964 \ 965 develop(bool, UseMallocOnly, false, \ 966 "Use only malloc/free for allocation (no resource area/arena)") \ 967 \ 968 develop(bool, PrintMalloc, false, \ 969 "Print all malloc/free calls") \ 970 \ 971 develop(bool, PrintMallocStatistics, false, \ 972 "Print malloc/free statistics") \ 973 \ 974 develop(bool, ZapResourceArea, trueInDebug, \ 975 "Zap freed resource/arena space with 0xABABABAB") \ 976 \ 977 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 978 "Zap freed VM handle space with 0xBCBCBCBC") \ 979 \ 980 develop(bool, ZapJNIHandleArea, trueInDebug, \ 981 "Zap freed JNI handle space with 0xFEFEFEFE") \ 982 \ 983 notproduct(bool, ZapStackSegments, trueInDebug, \ 984 "Zap allocated/freed stack segments with 0xFADFADED") \ 985 \ 986 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 987 "Zap unused heap space with 0xBAADBABE") \ 988 \ 989 develop(bool, TraceZapUnusedHeapArea, false, \ 990 "Trace zapping of unused heap space") \ 991 \ 992 develop(bool, CheckZapUnusedHeapArea, false, \ 993 "Check zapping of unused heap space") \ 994 \ 995 develop(bool, ZapFillerObjects, trueInDebug, \ 996 "Zap filler objects with 0xDEAFBABE") \ 997 \ 998 develop(bool, PrintVMMessages, true, \ 999 "Print VM messages on console") \ 1000 \ 1001 product(bool, PrintGCApplicationConcurrentTime, false, \ 1002 "Print the time the application has been running") \ 1003 \ 1004 product(bool, PrintGCApplicationStoppedTime, false, \ 1005 "Print the time the application has been stopped") \ 1006 \ 1007 diagnostic(bool, VerboseVerification, false, \ 1008 "Display detailed verification details") \ 1009 \ 1010 notproduct(uintx, ErrorHandlerTest, 0, \ 1011 "If > 0, provokes an error after VM initialization; the value " \ 1012 "determines which error to provoke. See test_error_handler() " \ 1013 "in debug.cpp.") \ 1014 \ 1015 notproduct(uintx, TestCrashInErrorHandler, 0, \ 1016 "If > 0, provokes an error inside VM error handler (a secondary " \ 1017 "crash). see test_error_handler() in debug.cpp.") \ 1018 \ 1019 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 1020 "If true, tests SafeFetch inside error handler.") \ 1021 \ 1022 develop(bool, Verbose, false, \ 1023 "Print additional debugging information from other modes") \ 1024 \ 1025 develop(bool, PrintMiscellaneous, false, \ 1026 "Print uncategorized debugging information (requires +Verbose)") \ 1027 \ 1028 develop(bool, WizardMode, false, \ 1029 "Print much more debugging information") \ 1030 \ 1031 product(bool, ShowMessageBoxOnError, false, \ 1032 "Keep process alive on VM fatal error") \ 1033 \ 1034 product(bool, CreateCoredumpOnCrash, true, \ 1035 "Create core/mini dump on VM fatal error") \ 1036 \ 1037 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 1038 "Timeout, in seconds, to limit the time spent on writing an " \ 1039 "error log in case of a crash.") \ 1040 range(0, (uint64_t)max_jlong/1000) \ 1041 \ 1042 product_pd(bool, UseOSErrorReporting, \ 1043 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 1044 \ 1045 product(bool, SuppressFatalErrorMessage, false, \ 1046 "Report NO fatal error message (avoid deadlock)") \ 1047 \ 1048 product(ccstrlist, OnError, "", \ 1049 "Run user-defined commands on fatal error; see VMError.cpp " \ 1050 "for examples") \ 1051 \ 1052 product(ccstrlist, OnOutOfMemoryError, "", \ 1053 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 1054 \ 1055 manageable(bool, HeapDumpBeforeFullGC, false, \ 1056 "Dump heap to file before any major stop-the-world GC") \ 1057 \ 1058 manageable(bool, HeapDumpAfterFullGC, false, \ 1059 "Dump heap to file after any major stop-the-world GC") \ 1060 \ 1061 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 1062 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 1063 \ 1064 manageable(ccstr, HeapDumpPath, NULL, \ 1065 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 1066 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 1067 "in the working directory)") \ 1068 \ 1069 develop(size_t, SegmentedHeapDumpThreshold, 2*G, \ 1070 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 1071 "when the heap usage is larger than this") \ 1072 \ 1073 develop(size_t, HeapDumpSegmentSize, 1*G, \ 1074 "Approximate segment size when generating a segmented heap dump") \ 1075 \ 1076 develop(bool, BreakAtWarning, false, \ 1077 "Execute breakpoint upon encountering VM warning") \ 1078 \ 1079 develop(bool, UseFakeTimers, false, \ 1080 "Tell whether the VM should use system time or a fake timer") \ 1081 \ 1082 product(ccstr, NativeMemoryTracking, "off", \ 1083 "Native memory tracking options") \ 1084 \ 1085 diagnostic(bool, PrintNMTStatistics, false, \ 1086 "Print native memory tracking summary data if it is on") \ 1087 \ 1088 diagnostic(bool, LogCompilation, false, \ 1089 "Log compilation activity in detail to LogFile") \ 1090 \ 1091 product(bool, PrintCompilation, false, \ 1092 "Print compilations") \ 1093 \ 1094 diagnostic(bool, TraceNMethodInstalls, false, \ 1095 "Trace nmethod installation") \ 1096 \ 1097 diagnostic(intx, ScavengeRootsInCode, 2, \ 1098 "0: do not allow scavengable oops in the code cache; " \ 1099 "1: allow scavenging from the code cache; " \ 1100 "2: emit as many constants as the compiler can see") \ 1101 range(0, 2) \ 1102 \ 1103 product(bool, AlwaysRestoreFPU, false, \ 1104 "Restore the FPU control word after every JNI call (expensive)") \ 1105 \ 1106 diagnostic(bool, PrintCompilation2, false, \ 1107 "Print additional statistics per compilation") \ 1108 \ 1109 diagnostic(bool, PrintAdapterHandlers, false, \ 1110 "Print code generated for i2c/c2i adapters") \ 1111 \ 1112 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 1113 "Verify that i2c/c2i adapters are called properly") \ 1114 \ 1115 develop(bool, VerifyAdapterSharing, false, \ 1116 "Verify that the code for shared adapters is the equivalent") \ 1117 \ 1118 diagnostic(bool, PrintAssembly, false, \ 1119 "Print assembly code (using external disassembler.so)") \ 1120 \ 1121 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 1122 "Print options string passed to disassembler.so") \ 1123 \ 1124 notproduct(bool, PrintNMethodStatistics, false, \ 1125 "Print a summary statistic for the generated nmethods") \ 1126 \ 1127 diagnostic(bool, PrintNMethods, false, \ 1128 "Print assembly code for nmethods when generated") \ 1129 \ 1130 diagnostic(bool, PrintNativeNMethods, false, \ 1131 "Print assembly code for native nmethods when generated") \ 1132 \ 1133 develop(bool, PrintDebugInfo, false, \ 1134 "Print debug information for all nmethods when generated") \ 1135 \ 1136 develop(bool, PrintRelocations, false, \ 1137 "Print relocation information for all nmethods when generated") \ 1138 \ 1139 develop(bool, PrintDependencies, false, \ 1140 "Print dependency information for all nmethods when generated") \ 1141 \ 1142 develop(bool, PrintExceptionHandlers, false, \ 1143 "Print exception handler tables for all nmethods when generated") \ 1144 \ 1145 develop(bool, StressCompiledExceptionHandlers, false, \ 1146 "Exercise compiled exception handlers") \ 1147 \ 1148 develop(bool, InterceptOSException, false, \ 1149 "Start debugger when an implicit OS (e.g. NULL) " \ 1150 "exception happens") \ 1151 \ 1152 product(bool, PrintCodeCache, false, \ 1153 "Print the code cache memory usage when exiting") \ 1154 \ 1155 develop(bool, PrintCodeCache2, false, \ 1156 "Print detailed usage information on the code cache when exiting")\ 1157 \ 1158 product(bool, PrintCodeCacheOnCompilation, false, \ 1159 "Print the code cache memory usage each time a method is " \ 1160 "compiled") \ 1161 \ 1162 diagnostic(bool, PrintStubCode, false, \ 1163 "Print generated stub code") \ 1164 \ 1165 product(bool, StackTraceInThrowable, true, \ 1166 "Collect backtrace in throwable when exception happens") \ 1167 \ 1168 product(bool, OmitStackTraceInFastThrow, true, \ 1169 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1170 \ 1171 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1172 "Print bytecode statistics when dumping profiler output") \ 1173 \ 1174 product(bool, ProfilerRecordPC, false, \ 1175 "Collect ticks for each 16 byte interval of compiled code") \ 1176 \ 1177 product(bool, ProfileVM, false, \ 1178 "Profile ticks that fall within VM (either in the VM Thread " \ 1179 "or VM code called through stubs)") \ 1180 \ 1181 product(bool, ProfileIntervals, false, \ 1182 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1183 \ 1184 notproduct(bool, ProfilerCheckIntervals, false, \ 1185 "Collect and print information on spacing of profiler ticks") \ 1186 \ 1187 product(bool, PrintWarnings, true, \ 1188 "Print JVM warnings to output stream") \ 1189 \ 1190 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1191 "Print warnings for stalled SpinLocks") \ 1192 \ 1193 product(bool, RegisterFinalizersAtInit, true, \ 1194 "Register finalizable objects at end of Object.<init> or " \ 1195 "after allocation") \ 1196 \ 1197 develop(bool, RegisterReferences, true, \ 1198 "Tell whether the VM should register soft/weak/final/phantom " \ 1199 "references") \ 1200 \ 1201 develop(bool, IgnoreRewrites, false, \ 1202 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1203 "This is unsafe!") \ 1204 \ 1205 develop(bool, PrintCodeCacheExtension, false, \ 1206 "Print extension of code cache") \ 1207 \ 1208 develop(bool, UsePrivilegedStack, true, \ 1209 "Enable the security JVM functions") \ 1210 \ 1211 develop(bool, ProtectionDomainVerification, true, \ 1212 "Verify protection domain before resolution in system dictionary")\ 1213 \ 1214 product(bool, ClassUnloading, true, \ 1215 "Do unloading of classes") \ 1216 \ 1217 product(bool, ClassUnloadingWithConcurrentMark, true, \ 1218 "Do unloading of classes with a concurrent marking cycle") \ 1219 \ 1220 develop(bool, DisableStartThread, false, \ 1221 "Disable starting of additional Java threads " \ 1222 "(for debugging only)") \ 1223 \ 1224 develop(bool, MemProfiling, false, \ 1225 "Write memory usage profiling to log file") \ 1226 \ 1227 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1228 "Print the system dictionary at exit") \ 1229 \ 1230 experimental(intx, PredictedLoadedClassCount, 0, \ 1231 "Experimental: Tune loaded class cache starting size") \ 1232 \ 1233 diagnostic(bool, UnsyncloadClass, false, \ 1234 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1235 "class loader must call VM synchronized for findClass " \ 1236 "and defineClass.") \ 1237 \ 1238 product(bool, AlwaysLockClassLoader, false, \ 1239 "Require the VM to acquire the class loader lock before calling " \ 1240 "loadClass() even for class loaders registering " \ 1241 "as parallel capable") \ 1242 \ 1243 product(bool, AllowParallelDefineClass, false, \ 1244 "Allow parallel defineClass requests for class loaders " \ 1245 "registering as parallel capable") \ 1246 \ 1247 product(bool, MustCallLoadClassInternal, false, \ 1248 "Call loadClassInternal() rather than loadClass()") \ 1249 \ 1250 product_pd(bool, DontYieldALot, \ 1251 "Throw away obvious excess yield calls") \ 1252 \ 1253 product_pd(bool, ConvertSleepToYield, \ 1254 "Convert sleep(0) to thread yield " \ 1255 "(may be off for Solaris to improve GUI)") \ 1256 \ 1257 product(bool, ConvertYieldToSleep, false, \ 1258 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1259 "behavior") \ 1260 \ 1261 develop(bool, UseDetachedThreads, true, \ 1262 "Use detached threads that are recycled upon termination " \ 1263 "(for Solaris only)") \ 1264 \ 1265 product(bool, UseLWPSynchronization, true, \ 1266 "Use LWP-based instead of libthread-based synchronization " \ 1267 "(SPARC only)") \ 1268 \ 1269 experimental(ccstr, SyncKnobs, NULL, \ 1270 "(Unstable) Various monitor synchronization tunables") \ 1271 \ 1272 experimental(intx, EmitSync, 0, \ 1273 "(Unsafe, Unstable) " \ 1274 "Control emission of inline sync fast-path code") \ 1275 \ 1276 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1277 range(0, max_jint) \ 1278 \ 1279 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1280 \ 1281 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1282 "Experimental Sync flags") \ 1283 \ 1284 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1285 \ 1286 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \ 1287 \ 1288 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1289 \ 1290 experimental(intx, hashCode, 5, \ 1291 "(Unstable) select hashCode generation algorithm") \ 1292 \ 1293 experimental(intx, WorkAroundNPTLTimedWaitHang, 0, \ 1294 "(Unstable, Linux-specific) " \ 1295 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \ 1296 \ 1297 product(bool, FilterSpuriousWakeups, true, \ 1298 "When true prevents OS-level spurious, or premature, wakeups " \ 1299 "from Object.wait (Ignored for Windows)") \ 1300 \ 1301 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1302 \ 1303 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1304 \ 1305 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1306 \ 1307 develop(bool, UsePthreads, false, \ 1308 "Use pthread-based instead of libthread-based synchronization " \ 1309 "(SPARC only)") \ 1310 \ 1311 product(bool, ReduceSignalUsage, false, \ 1312 "Reduce the use of OS signals in Java and/or the VM") \ 1313 \ 1314 develop_pd(bool, ShareVtableStubs, \ 1315 "Share vtable stubs (smaller code but worse branch prediction") \ 1316 \ 1317 develop(bool, LoadLineNumberTables, true, \ 1318 "Tell whether the class file parser loads line number tables") \ 1319 \ 1320 develop(bool, LoadLocalVariableTables, true, \ 1321 "Tell whether the class file parser loads local variable tables") \ 1322 \ 1323 develop(bool, LoadLocalVariableTypeTables, true, \ 1324 "Tell whether the class file parser loads local variable type" \ 1325 "tables") \ 1326 \ 1327 product(bool, AllowUserSignalHandlers, false, \ 1328 "Do not complain if the application installs signal handlers " \ 1329 "(Solaris & Linux only)") \ 1330 \ 1331 product(bool, UseSignalChaining, true, \ 1332 "Use signal-chaining to invoke signal handlers installed " \ 1333 "by the application (Solaris & Linux only)") \ 1334 \ 1335 product(bool, AllowJNIEnvProxy, false, \ 1336 "Allow JNIEnv proxies for jdbx") \ 1337 \ 1338 product(bool, RestoreMXCSROnJNICalls, false, \ 1339 "Restore MXCSR when returning from JNI calls") \ 1340 \ 1341 product(bool, CheckJNICalls, false, \ 1342 "Verify all arguments to JNI calls") \ 1343 \ 1344 product(bool, CheckEndorsedAndExtDirs, false, \ 1345 "Verify the endorsed and extension directories are not used") \ 1346 \ 1347 product(bool, UseFastJNIAccessors, true, \ 1348 "Use optimized versions of Get<Primitive>Field") \ 1349 \ 1350 product(intx, MaxJNILocalCapacity, 65536, \ 1351 "Maximum allowable local JNI handle capacity to " \ 1352 "EnsureLocalCapacity() and PushLocalFrame(), " \ 1353 "where <= 0 is unlimited, default: 65536") \ 1354 range(min_intx, max_intx) \ 1355 \ 1356 product(bool, EagerXrunInit, false, \ 1357 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1358 "but not all -Xrun libraries may support the state of the VM " \ 1359 "at this time") \ 1360 \ 1361 product(bool, PreserveAllAnnotations, false, \ 1362 "Preserve RuntimeInvisibleAnnotations as well " \ 1363 "as RuntimeVisibleAnnotations") \ 1364 \ 1365 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1366 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1367 \ 1368 product(bool, UseXMMForArrayCopy, false, \ 1369 "Use SSE2 MOVQ instruction for Arraycopy") \ 1370 \ 1371 product(intx, FieldsAllocationStyle, 1, \ 1372 "0 - type based with oops first, " \ 1373 "1 - with oops last, " \ 1374 "2 - oops in super and sub classes are together") \ 1375 range(0, 2) \ 1376 \ 1377 product(bool, CompactFields, true, \ 1378 "Allocate nonstatic fields in gaps between previous fields") \ 1379 \ 1380 notproduct(bool, PrintFieldLayout, false, \ 1381 "Print field layout for each class") \ 1382 \ 1383 /* Need to limit the extent of the padding to reasonable size. */\ 1384 /* 8K is well beyond the reasonable HW cache line size, even with */\ 1385 /* aggressive prefetching, while still leaving the room for segregating */\ 1386 /* among the distinct pages. */\ 1387 product(intx, ContendedPaddingWidth, 128, \ 1388 "How many bytes to pad the fields/classes marked @Contended with")\ 1389 range(0, 8192) \ 1390 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 1391 \ 1392 product(bool, EnableContended, true, \ 1393 "Enable @Contended annotation support") \ 1394 \ 1395 product(bool, RestrictContended, true, \ 1396 "Restrict @Contended to trusted classes") \ 1397 \ 1398 product(bool, UseBiasedLocking, true, \ 1399 "Enable biased locking in JVM") \ 1400 \ 1401 product(intx, BiasedLockingStartupDelay, 4000, \ 1402 "Number of milliseconds to wait before enabling biased locking") \ 1403 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 1404 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 1405 \ 1406 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1407 "Print statistics of biased locking in JVM") \ 1408 \ 1409 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1410 "Threshold of number of revocations per type to try to " \ 1411 "rebias all objects in the heap of that type") \ 1412 range(0, max_intx) \ 1413 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 1414 \ 1415 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1416 "Threshold of number of revocations per type to permanently " \ 1417 "revoke biases of all objects in the heap of that type") \ 1418 range(0, max_intx) \ 1419 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 1420 \ 1421 product(intx, BiasedLockingDecayTime, 25000, \ 1422 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1423 "type after previous bulk rebias") \ 1424 range(500, max_intx) \ 1425 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 1426 \ 1427 /* tracing */ \ 1428 \ 1429 develop(bool, StressRewriter, false, \ 1430 "Stress linktime bytecode rewriting") \ 1431 \ 1432 product(ccstr, TraceJVMTI, NULL, \ 1433 "Trace flags for JVMTI functions and events") \ 1434 \ 1435 /* This option can change an EMCP method into an obsolete method. */ \ 1436 /* This can affect tests that except specific methods to be EMCP. */ \ 1437 /* This option should be used with caution. */ \ 1438 product(bool, StressLdcRewrite, false, \ 1439 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1440 \ 1441 product(uintx, TraceRedefineClasses, 0, \ 1442 "Trace level for JVMTI RedefineClasses") \ 1443 range(0, 0xFFFFFFFF) \ 1444 \ 1445 /* change to false by default sometime after Mustang */ \ 1446 product(bool, VerifyMergedCPBytecodes, true, \ 1447 "Verify bytecodes after RedefineClasses constant pool merging") \ 1448 \ 1449 develop(bool, TraceJNIHandleAllocation, false, \ 1450 "Trace allocation/deallocation of JNI handle blocks") \ 1451 \ 1452 develop(bool, TraceBytecodes, false, \ 1453 "Trace bytecode execution") \ 1454 \ 1455 develop(bool, TraceClassInitialization, false, \ 1456 "Trace class initialization") \ 1457 \ 1458 product(bool, TraceExceptions, false, \ 1459 "Trace exceptions") \ 1460 \ 1461 develop(bool, TraceICs, false, \ 1462 "Trace inline cache changes") \ 1463 \ 1464 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1465 "Trace method invocation counter overflow") \ 1466 \ 1467 develop(bool, TraceInlineCacheClearing, false, \ 1468 "Trace clearing of inline caches in nmethods") \ 1469 \ 1470 develop(bool, TraceDependencies, false, \ 1471 "Trace dependencies") \ 1472 \ 1473 develop(bool, VerifyDependencies, trueInDebug, \ 1474 "Exercise and verify the compilation dependency mechanism") \ 1475 \ 1476 develop(bool, TraceNewOopMapGeneration, false, \ 1477 "Trace OopMapGeneration") \ 1478 \ 1479 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1480 "Trace OopMapGeneration: print detailed cell states") \ 1481 \ 1482 develop(bool, TimeOopMap, false, \ 1483 "Time calls to GenerateOopMap::compute_map() in sum") \ 1484 \ 1485 develop(bool, TimeOopMap2, false, \ 1486 "Time calls to GenerateOopMap::compute_map() individually") \ 1487 \ 1488 develop(bool, TraceMonitorMismatch, false, \ 1489 "Trace monitor matching failures during OopMapGeneration") \ 1490 \ 1491 develop(bool, TraceOopMapRewrites, false, \ 1492 "Trace rewriting of method oops during oop map generation") \ 1493 \ 1494 develop(bool, TraceICBuffer, false, \ 1495 "Trace usage of IC buffer") \ 1496 \ 1497 develop(bool, TraceCompiledIC, false, \ 1498 "Trace changes of compiled IC") \ 1499 \ 1500 develop(bool, TraceStartupTime, false, \ 1501 "Trace setup time") \ 1502 \ 1503 develop(bool, TraceProtectionDomainVerification, false, \ 1504 "Trace protection domain verification") \ 1505 \ 1506 develop(bool, TraceClearedExceptions, false, \ 1507 "Print when an exception is forcibly cleared") \ 1508 \ 1509 product(bool, TraceClassResolution, false, \ 1510 "Trace all constant pool resolutions (for debugging)") \ 1511 \ 1512 product(bool, TraceBiasedLocking, false, \ 1513 "Trace biased locking in JVM") \ 1514 \ 1515 product(bool, TraceMonitorInflation, false, \ 1516 "Trace monitor inflation in JVM") \ 1517 \ 1518 /* gc */ \ 1519 \ 1520 product(bool, UseSerialGC, false, \ 1521 "Use the Serial garbage collector") \ 1522 \ 1523 product(bool, UseG1GC, false, \ 1524 "Use the Garbage-First garbage collector") \ 1525 \ 1526 product(bool, UseParallelGC, false, \ 1527 "Use the Parallel Scavenge garbage collector") \ 1528 \ 1529 product(bool, UseParallelOldGC, false, \ 1530 "Use the Parallel Old garbage collector") \ 1531 \ 1532 product(uintx, HeapMaximumCompactionInterval, 20, \ 1533 "How often should we maximally compact the heap (not allowing " \ 1534 "any dead space)") \ 1535 \ 1536 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1537 "The collection count for the first maximum compaction") \ 1538 \ 1539 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1540 "Use maximum compaction in the Parallel Old garbage collector " \ 1541 "for a system GC") \ 1542 \ 1543 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1544 "The mean used by the parallel compact dead wood " \ 1545 "limiter (a number between 0-100)") \ 1546 range(0, 100) \ 1547 \ 1548 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1549 "The standard deviation used by the parallel compact dead wood " \ 1550 "limiter (a number between 0-100)") \ 1551 range(0, 100) \ 1552 \ 1553 product(uint, ParallelGCThreads, 0, \ 1554 "Number of parallel threads parallel gc will use") \ 1555 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \ 1556 \ 1557 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \ 1558 "Use semaphore synchronization for the GC Threads, " \ 1559 "instead of synchronization based on mutexes") \ 1560 \ 1561 product(bool, UseDynamicNumberOfGCThreads, false, \ 1562 "Dynamically choose the number of parallel threads " \ 1563 "parallel gc will use") \ 1564 \ 1565 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1566 "Force dynamic selection of the number of " \ 1567 "parallel threads parallel gc will use to aid debugging") \ 1568 \ 1569 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1570 "Size of heap (bytes) per GC thread used in calculating the " \ 1571 "number of GC threads") \ 1572 range((size_t)os::vm_page_size(), (size_t)max_uintx) \ 1573 \ 1574 product(bool, TraceDynamicGCThreads, false, \ 1575 "Trace the dynamic GC thread usage") \ 1576 \ 1577 product(uint, ConcGCThreads, 0, \ 1578 "Number of threads concurrent gc will use") \ 1579 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \ 1580 \ 1581 product(uintx, GCTaskTimeStampEntries, 200, \ 1582 "Number of time stamp entries per gc worker thread") \ 1583 range(1, max_uintx) \ 1584 \ 1585 product(bool, AlwaysTenure, false, \ 1586 "Always tenure objects in eden (ParallelGC only)") \ 1587 \ 1588 product(bool, NeverTenure, false, \ 1589 "Never tenure objects in eden, may tenure on overflow " \ 1590 "(ParallelGC only)") \ 1591 \ 1592 product(bool, ScavengeBeforeFullGC, true, \ 1593 "Scavenge youngest generation before each full GC.") \ 1594 \ 1595 product(bool, UseConcMarkSweepGC, false, \ 1596 "Use Concurrent Mark-Sweep GC in the old generation") \ 1597 \ 1598 product(bool, ExplicitGCInvokesConcurrent, false, \ 1599 "A System.gc() request invokes a concurrent collection; " \ 1600 "(effective only when using concurrent collectors)") \ 1601 \ 1602 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1603 "A System.gc() request invokes a concurrent collection and " \ 1604 "also unloads classes during such a concurrent gc cycle " \ 1605 "(effective only when UseConcMarkSweepGC)") \ 1606 \ 1607 product(bool, GCLockerInvokesConcurrent, false, \ 1608 "The exit of a JNI critical section necessitating a scavenge, " \ 1609 "also kicks off a background concurrent collection") \ 1610 \ 1611 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1612 "How much the GC can expand the eden by while the GC locker " \ 1613 "is active (as a percentage)") \ 1614 range(0, 100) \ 1615 \ 1616 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1617 "Number of times to retry allocations when " \ 1618 "blocked by the GC locker") \ 1619 \ 1620 product(bool, UseCMSBestFit, true, \ 1621 "Use CMS best fit allocation strategy") \ 1622 \ 1623 product(bool, UseParNewGC, false, \ 1624 "Use parallel threads in the new generation") \ 1625 \ 1626 product(bool, PrintTaskqueue, false, \ 1627 "Print taskqueue statistics for parallel collectors") \ 1628 \ 1629 product(bool, PrintTerminationStats, false, \ 1630 "Print termination statistics for parallel collectors") \ 1631 \ 1632 product(uintx, ParallelGCBufferWastePct, 10, \ 1633 "Wasted fraction of parallel allocation buffer") \ 1634 range(0, 100) \ 1635 \ 1636 product(uintx, TargetPLABWastePct, 10, \ 1637 "Target wasted space in last buffer as percent of overall " \ 1638 "allocation") \ 1639 range(1, 100) \ 1640 \ 1641 product(uintx, PLABWeight, 75, \ 1642 "Percentage (0-100) used to weight the current sample when " \ 1643 "computing exponentially decaying average for ResizePLAB") \ 1644 range(0, 100) \ 1645 \ 1646 product(bool, ResizePLAB, true, \ 1647 "Dynamically resize (survivor space) promotion LAB's") \ 1648 \ 1649 product(bool, PrintPLAB, false, \ 1650 "Print (survivor space) promotion LAB's sizing decisions") \ 1651 \ 1652 product(intx, ParGCArrayScanChunk, 50, \ 1653 "Scan a subset of object array and push remainder, if array is " \ 1654 "bigger than this") \ 1655 range(1, max_intx) \ 1656 \ 1657 product(bool, ParGCUseLocalOverflow, false, \ 1658 "Instead of a global overflow list, use local overflow stacks") \ 1659 \ 1660 product(bool, ParGCTrimOverflow, true, \ 1661 "Eagerly trim the local overflow lists " \ 1662 "(when ParGCUseLocalOverflow)") \ 1663 \ 1664 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1665 "Simulate work queue overflow in ParNew") \ 1666 \ 1667 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1668 "An `interval' counter that determines how frequently " \ 1669 "we simulate overflow; a smaller number increases frequency") \ 1670 \ 1671 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1672 "The desired number of objects to claim from the overflow list") \ 1673 \ 1674 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1675 "The number of strides per worker thread that we divide up the " \ 1676 "card table scanning work into") \ 1677 range(1, max_uintx) \ 1678 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \ 1679 \ 1680 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1681 "The number of cards in each chunk of the parallel chunks used " \ 1682 "during card table scanning") \ 1683 range(1, max_intx) \ 1684 \ 1685 product(uintx, OldPLABWeight, 50, \ 1686 "Percentage (0-100) used to weight the current sample when " \ 1687 "computing exponentially decaying average for resizing " \ 1688 "OldPLABSize") \ 1689 range(0, 100) \ 1690 \ 1691 product(bool, ResizeOldPLAB, true, \ 1692 "Dynamically resize (old gen) promotion LAB's") \ 1693 \ 1694 product(bool, PrintOldPLAB, false, \ 1695 "Print (old gen) promotion LAB's sizing decisions") \ 1696 \ 1697 product(size_t, CMSOldPLABMax, 1024, \ 1698 "Maximum size of CMS gen promotion LAB caches per worker " \ 1699 "per block size") \ 1700 range(1, max_uintx) \ 1701 constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \ 1702 \ 1703 product(size_t, CMSOldPLABMin, 16, \ 1704 "Minimum size of CMS gen promotion LAB caches per worker " \ 1705 "per block size") \ 1706 range(1, max_uintx) \ 1707 constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \ 1708 \ 1709 product(uintx, CMSOldPLABNumRefills, 4, \ 1710 "Nominal number of refills of CMS gen promotion LAB cache " \ 1711 "per worker per block size") \ 1712 range(1, max_uintx) \ 1713 \ 1714 product(bool, CMSOldPLABResizeQuicker, false, \ 1715 "React on-the-fly during a scavenge to a sudden " \ 1716 "change in block demand rate") \ 1717 \ 1718 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1719 "The tolerance of the phase-change detector for on-the-fly " \ 1720 "PLAB resizing during a scavenge") \ 1721 range(1, max_uintx) \ 1722 \ 1723 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1724 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1725 "during a scavenge") \ 1726 \ 1727 product(bool, AlwaysPreTouch, false, \ 1728 "Force all freshly committed pages to be pre-touched") \ 1729 \ 1730 product_pd(size_t, CMSYoungGenPerWorker, \ 1731 "The maximum size of young gen chosen by default per GC worker " \ 1732 "thread available") \ 1733 range(1, max_uintx) \ 1734 \ 1735 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1736 "Percentage (0-100) used to add conservatism when computing the " \ 1737 "duty cycle") \ 1738 range(0, 100) \ 1739 \ 1740 product(uintx, CMSExpAvgFactor, 50, \ 1741 "Percentage (0-100) used to weight the current sample when " \ 1742 "computing exponential averages for CMS statistics") \ 1743 range(0, 100) \ 1744 \ 1745 product(uintx, CMS_FLSWeight, 75, \ 1746 "Percentage (0-100) used to weight the current sample when " \ 1747 "computing exponentially decaying averages for CMS FLS " \ 1748 "statistics") \ 1749 range(0, 100) \ 1750 \ 1751 product(uintx, CMS_FLSPadding, 1, \ 1752 "The multiple of deviation from mean to use for buffering " \ 1753 "against volatility in free list demand") \ 1754 \ 1755 product(uintx, FLSCoalescePolicy, 2, \ 1756 "CMS: aggressiveness level for coalescing, increasing " \ 1757 "from 0 to 4") \ 1758 range(0, 4) \ 1759 \ 1760 product(bool, FLSAlwaysCoalesceLarge, false, \ 1761 "CMS: larger free blocks are always available for coalescing") \ 1762 \ 1763 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1764 "CMS: the smaller the percentage the greater the coalescing " \ 1765 "force") \ 1766 range(0.0, 1.0) \ 1767 \ 1768 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1769 "CMS: the factor by which to inflate estimated demand of small " \ 1770 "block sizes to prevent coalescing with an adjoining block") \ 1771 range(0.0, DBL_MAX) \ 1772 \ 1773 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1774 "CMS: the factor by which to inflate estimated demand of large " \ 1775 "block sizes to prevent coalescing with an adjoining block") \ 1776 range(0.0, DBL_MAX) \ 1777 \ 1778 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1779 "CMS: the factor by which to inflate estimated demand of small " \ 1780 "block sizes to prevent splitting to supply demand for smaller " \ 1781 "blocks") \ 1782 range(0.0, DBL_MAX) \ 1783 \ 1784 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1785 "CMS: the factor by which to inflate estimated demand of large " \ 1786 "block sizes to prevent splitting to supply demand for smaller " \ 1787 "blocks") \ 1788 range(0.0, DBL_MAX) \ 1789 \ 1790 product(bool, CMSExtrapolateSweep, false, \ 1791 "CMS: cushion for block demand during sweep") \ 1792 \ 1793 product(uintx, CMS_SweepWeight, 75, \ 1794 "Percentage (0-100) used to weight the current sample when " \ 1795 "computing exponentially decaying average for inter-sweep " \ 1796 "duration") \ 1797 range(0, 100) \ 1798 \ 1799 product(uintx, CMS_SweepPadding, 1, \ 1800 "The multiple of deviation from mean to use for buffering " \ 1801 "against volatility in inter-sweep duration") \ 1802 \ 1803 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1804 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1805 "duration exceeds this threshold in milliseconds") \ 1806 \ 1807 product(bool, CMSClassUnloadingEnabled, true, \ 1808 "Whether class unloading enabled when using CMS GC") \ 1809 \ 1810 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1811 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1812 "count for which classes may not be unloaded") \ 1813 \ 1814 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1815 "Replenish an indexed free list with this number of chunks") \ 1816 range(1, max_uintx) \ 1817 \ 1818 product(bool, CMSReplenishIntermediate, true, \ 1819 "Replenish all intermediate free-list caches") \ 1820 \ 1821 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1822 "When satisfying batched demand, split blocks from the " \ 1823 "IndexedFreeList whose size is a multiple of requested size") \ 1824 \ 1825 product(bool, CMSLoopWarn, false, \ 1826 "Warn in case of excessive CMS looping") \ 1827 \ 1828 /* where does the range max value of (max_jint - 1) come from? */ \ 1829 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1830 "Maximum size of marking stack") \ 1831 range(1, (max_jint - 1)) \ 1832 \ 1833 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1834 "Size of marking stack") \ 1835 constraint(MarkStackSizeConstraintFunc,AfterErgo) \ 1836 \ 1837 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1838 "Simulate frequent marking stack / work queue overflow") \ 1839 \ 1840 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1841 "An \"interval\" counter that determines how frequently " \ 1842 "to simulate overflow; a smaller number increases frequency") \ 1843 \ 1844 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1845 "Maximum number of abortable preclean iterations, if > 0") \ 1846 \ 1847 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1848 "Maximum time in abortable preclean (in milliseconds)") \ 1849 range(0, max_intx) \ 1850 \ 1851 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1852 "Nominal minimum work per abortable preclean iteration") \ 1853 \ 1854 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1855 "Time that we sleep between iterations when not given " \ 1856 "enough work per iteration") \ 1857 range(0, max_intx) \ 1858 \ 1859 product(size_t, CMSRescanMultiple, 32, \ 1860 "Size (in cards) of CMS parallel rescan task") \ 1861 range(1, max_uintx) \ 1862 \ 1863 product(size_t, CMSConcMarkMultiple, 32, \ 1864 "Size (in cards) of CMS concurrent MT marking task") \ 1865 range(1, max_uintx) \ 1866 \ 1867 product(bool, CMSAbortSemantics, false, \ 1868 "Whether abort-on-overflow semantics is implemented") \ 1869 \ 1870 product(bool, CMSParallelInitialMarkEnabled, true, \ 1871 "Use the parallel initial mark.") \ 1872 \ 1873 product(bool, CMSParallelRemarkEnabled, true, \ 1874 "Whether parallel remark enabled (only if ParNewGC)") \ 1875 \ 1876 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1877 "Whether parallel remark of survivor space " \ 1878 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1879 \ 1880 product(bool, CMSPLABRecordAlways, true, \ 1881 "Always record survivor space PLAB boundaries (effective only " \ 1882 "if CMSParallelSurvivorRemarkEnabled)") \ 1883 \ 1884 product(bool, CMSEdenChunksRecordAlways, true, \ 1885 "Always record eden chunks used for the parallel initial mark " \ 1886 "or remark of eden") \ 1887 \ 1888 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1889 "Print the eden and the survivor chunks used for the parallel " \ 1890 "initial mark or remark of the eden/survivor spaces") \ 1891 \ 1892 product(bool, CMSConcurrentMTEnabled, true, \ 1893 "Whether multi-threaded concurrent work enabled " \ 1894 "(effective only if ParNewGC)") \ 1895 \ 1896 product(bool, CMSPrecleaningEnabled, true, \ 1897 "Whether concurrent precleaning enabled") \ 1898 \ 1899 product(uintx, CMSPrecleanIter, 3, \ 1900 "Maximum number of precleaning iteration passes") \ 1901 range(0, 9) \ 1902 \ 1903 product(uintx, CMSPrecleanDenominator, 3, \ 1904 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1905 "ratio") \ 1906 range(1, max_uintx) \ 1907 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \ 1908 \ 1909 product(uintx, CMSPrecleanNumerator, 2, \ 1910 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1911 "ratio") \ 1912 range(0, max_uintx-1) \ 1913 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \ 1914 \ 1915 product(bool, CMSPrecleanRefLists1, true, \ 1916 "Preclean ref lists during (initial) preclean phase") \ 1917 \ 1918 product(bool, CMSPrecleanRefLists2, false, \ 1919 "Preclean ref lists during abortable preclean phase") \ 1920 \ 1921 product(bool, CMSPrecleanSurvivors1, false, \ 1922 "Preclean survivors during (initial) preclean phase") \ 1923 \ 1924 product(bool, CMSPrecleanSurvivors2, true, \ 1925 "Preclean survivors during abortable preclean phase") \ 1926 \ 1927 product(uintx, CMSPrecleanThreshold, 1000, \ 1928 "Do not iterate again if number of dirty cards is less than this")\ 1929 range(100, max_uintx) \ 1930 \ 1931 product(bool, CMSCleanOnEnter, true, \ 1932 "Clean-on-enter optimization for reducing number of dirty cards") \ 1933 \ 1934 product(uintx, CMSRemarkVerifyVariant, 1, \ 1935 "Choose variant (1,2) of verification following remark") \ 1936 range(1, 2) \ 1937 \ 1938 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1939 "If Eden size is below this, do not try to schedule remark") \ 1940 \ 1941 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1942 "The Eden occupancy percentage (0-100) at which " \ 1943 "to try and schedule remark pause") \ 1944 range(0, 100) \ 1945 \ 1946 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1947 "Start sampling eden top at least before young gen " \ 1948 "occupancy reaches 1/<ratio> of the size at which " \ 1949 "we plan to schedule remark") \ 1950 range(1, max_uintx) \ 1951 \ 1952 product(uintx, CMSSamplingGrain, 16*K, \ 1953 "The minimum distance between eden samples for CMS (see above)") \ 1954 range(1, max_uintx) \ 1955 \ 1956 product(bool, CMSScavengeBeforeRemark, false, \ 1957 "Attempt scavenge before the CMS remark step") \ 1958 \ 1959 develop(bool, CMSTraceSweeper, false, \ 1960 "Trace some actions of the CMS sweeper") \ 1961 \ 1962 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1963 "Don't drain below this size per parallel worker/thief") \ 1964 range(1, max_juint) \ 1965 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \ 1966 \ 1967 manageable(intx, CMSWaitDuration, 2000, \ 1968 "Time in milliseconds that CMS thread waits for young GC") \ 1969 \ 1970 develop(uintx, CMSCheckInterval, 1000, \ 1971 "Interval in milliseconds that CMS thread checks if it " \ 1972 "should start a collection cycle") \ 1973 \ 1974 product(bool, CMSYield, true, \ 1975 "Yield between steps of CMS") \ 1976 \ 1977 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1978 "Bitmap operations should process at most this many bits " \ 1979 "between yields") \ 1980 range(1, max_uintx) \ 1981 \ 1982 product(bool, CMSDumpAtPromotionFailure, false, \ 1983 "Dump useful information about the state of the CMS old " \ 1984 "generation upon a promotion failure") \ 1985 \ 1986 product(bool, CMSPrintChunksInDump, false, \ 1987 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1988 "more detailed information about the free chunks") \ 1989 \ 1990 product(bool, CMSPrintObjectsInDump, false, \ 1991 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1992 "more detailed information about the allocated objects") \ 1993 \ 1994 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1995 "Verify that all references across the FLS boundary " \ 1996 "are to valid objects") \ 1997 \ 1998 diagnostic(bool, FLSVerifyLists, false, \ 1999 "Do lots of (expensive) FreeListSpace verification") \ 2000 \ 2001 diagnostic(bool, FLSVerifyIndexTable, false, \ 2002 "Do lots of (expensive) FLS index table verification") \ 2003 \ 2004 develop(bool, FLSVerifyDictionary, false, \ 2005 "Do lots of (expensive) FLS dictionary verification") \ 2006 \ 2007 develop(bool, VerifyBlockOffsetArray, false, \ 2008 "Do (expensive) block offset array verification") \ 2009 \ 2010 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 2011 "Maintain _unallocated_block in BlockOffsetArray " \ 2012 "(currently applicable only to CMS collector)") \ 2013 \ 2014 develop(bool, TraceCMSState, false, \ 2015 "Trace the state of the CMS collection") \ 2016 \ 2017 product(intx, RefDiscoveryPolicy, 0, \ 2018 "Select type of reference discovery policy: " \ 2019 "reference-based(0) or referent-based(1)") \ 2020 range(ReferenceProcessor::DiscoveryPolicyMin, \ 2021 ReferenceProcessor::DiscoveryPolicyMax) \ 2022 \ 2023 product(bool, ParallelRefProcEnabled, false, \ 2024 "Enable parallel reference processing whenever possible") \ 2025 \ 2026 product(bool, ParallelRefProcBalancingEnabled, true, \ 2027 "Enable balancing of reference processing queues") \ 2028 \ 2029 product(uintx, CMSTriggerRatio, 80, \ 2030 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 2031 "allocated before a CMS collection cycle commences") \ 2032 range(0, 100) \ 2033 \ 2034 product(uintx, CMSBootstrapOccupancy, 50, \ 2035 "Percentage CMS generation occupancy at which to " \ 2036 "initiate CMS collection for bootstrapping collection stats") \ 2037 range(0, 100) \ 2038 \ 2039 product(intx, CMSInitiatingOccupancyFraction, -1, \ 2040 "Percentage CMS generation occupancy to start a CMS collection " \ 2041 "cycle. A negative value means that CMSTriggerRatio is used") \ 2042 range(min_intx, 100) \ 2043 \ 2044 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 2045 "Percentage of the (entire) heap occupancy to start a " \ 2046 "concurrent GC cycle. It is used by GCs that trigger a " \ 2047 "concurrent GC cycle based on the occupancy of the entire heap, " \ 2048 "not just one of the generations (e.g., G1). A value of 0 " \ 2049 "denotes 'do constant GC cycles'.") \ 2050 range(0, 100) \ 2051 \ 2052 manageable(intx, CMSTriggerInterval, -1, \ 2053 "Commence a CMS collection cycle (at least) every so many " \ 2054 "milliseconds (0 permanently, -1 disabled)") \ 2055 range(-1, max_intx) \ 2056 \ 2057 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2058 "Only use occupancy as a criterion for starting a CMS collection")\ 2059 \ 2060 product(uintx, CMSIsTooFullPercentage, 98, \ 2061 "An absolute ceiling above which CMS will always consider the " \ 2062 "unloading of classes when class unloading is enabled") \ 2063 range(0, 100) \ 2064 \ 2065 develop(bool, CMSTestInFreeList, false, \ 2066 "Check if the coalesced range is already in the " \ 2067 "free lists as claimed") \ 2068 \ 2069 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2070 "Check that all the garbage collected was returned to the " \ 2071 "free lists") \ 2072 \ 2073 notproduct(bool, ScavengeALot, false, \ 2074 "Force scavenge at every Nth exit from the runtime system " \ 2075 "(N=ScavengeALotInterval)") \ 2076 \ 2077 develop(bool, FullGCALot, false, \ 2078 "Force full gc at every Nth exit from the runtime system " \ 2079 "(N=FullGCALotInterval)") \ 2080 \ 2081 notproduct(bool, GCALotAtAllSafepoints, false, \ 2082 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2083 \ 2084 product(bool, PrintPromotionFailure, false, \ 2085 "Print additional diagnostic information following " \ 2086 "promotion failure") \ 2087 \ 2088 notproduct(bool, PromotionFailureALot, false, \ 2089 "Use promotion failure handling on every youngest generation " \ 2090 "collection") \ 2091 \ 2092 develop(uintx, PromotionFailureALotCount, 1000, \ 2093 "Number of promotion failures occurring at PLAB " \ 2094 "refill attempts (ParNew) or promotion attempts " \ 2095 "(other young collectors)") \ 2096 \ 2097 develop(uintx, PromotionFailureALotInterval, 5, \ 2098 "Total collections between promotion failures a lot") \ 2099 \ 2100 experimental(uintx, WorkStealingSleepMillis, 1, \ 2101 "Sleep time when sleep is used for yields") \ 2102 \ 2103 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2104 "Number of yields before a sleep is done during work stealing") \ 2105 \ 2106 experimental(uintx, WorkStealingHardSpins, 4096, \ 2107 "Number of iterations in a spin loop between checks on " \ 2108 "time out of hard spin") \ 2109 \ 2110 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2111 "Ratio of hard spins to calls to yield") \ 2112 \ 2113 develop(uintx, ObjArrayMarkingStride, 512, \ 2114 "Number of object array elements to push onto the marking stack " \ 2115 "before pushing a continuation entry") \ 2116 \ 2117 develop(bool, MetadataAllocationFailALot, false, \ 2118 "Fail metadata allocations at intervals controlled by " \ 2119 "MetadataAllocationFailALotInterval") \ 2120 \ 2121 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2122 "Metadata allocation failure a lot interval") \ 2123 \ 2124 develop(bool, TraceMetadataChunkAllocation, false, \ 2125 "Trace chunk metadata allocations") \ 2126 \ 2127 product(bool, TraceMetadataHumongousAllocation, false, \ 2128 "Trace humongous metadata allocations") \ 2129 \ 2130 develop(bool, TraceMetavirtualspaceAllocation, false, \ 2131 "Trace virtual space metadata allocations") \ 2132 \ 2133 notproduct(bool, ExecuteInternalVMTests, false, \ 2134 "Enable execution of internal VM tests") \ 2135 \ 2136 notproduct(bool, VerboseInternalVMTests, false, \ 2137 "Turn on logging for internal VM tests.") \ 2138 \ 2139 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2140 \ 2141 product_pd(bool, ResizeTLAB, \ 2142 "Dynamically resize TLAB size for threads") \ 2143 \ 2144 product(bool, ZeroTLAB, false, \ 2145 "Zero out the newly created TLAB") \ 2146 \ 2147 product(bool, FastTLABRefill, true, \ 2148 "Use fast TLAB refill code") \ 2149 \ 2150 product(bool, PrintTLAB, false, \ 2151 "Print various TLAB related information") \ 2152 \ 2153 product(bool, TLABStats, true, \ 2154 "Provide more detailed and expensive TLAB statistics " \ 2155 "(with PrintTLAB)") \ 2156 \ 2157 product_pd(bool, NeverActAsServerClassMachine, \ 2158 "Never act like a server-class machine") \ 2159 \ 2160 product(bool, AlwaysActAsServerClassMachine, false, \ 2161 "Always act like a server-class machine") \ 2162 \ 2163 product_pd(uint64_t, MaxRAM, \ 2164 "Real memory size (in bytes) used to set maximum heap size") \ 2165 range(0, 0XFFFFFFFFFFFFFFFF) \ 2166 \ 2167 product(size_t, ErgoHeapSizeLimit, 0, \ 2168 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2169 "MaxRAM / MaxRAMFraction") \ 2170 \ 2171 product(uintx, MaxRAMFraction, 4, \ 2172 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2173 "size") \ 2174 range(1, max_uintx) \ 2175 \ 2176 product(uintx, MinRAMFraction, 2, \ 2177 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2178 "size on systems with small physical memory size") \ 2179 range(1, max_uintx) \ 2180 \ 2181 product(uintx, InitialRAMFraction, 64, \ 2182 "Fraction (1/n) of real memory used for initial heap size") \ 2183 range(1, max_uintx) \ 2184 \ 2185 develop(uintx, MaxVirtMemFraction, 2, \ 2186 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2187 "determining maximum heap size") \ 2188 \ 2189 product(bool, UseAutoGCSelectPolicy, false, \ 2190 "Use automatic collection selection policy") \ 2191 \ 2192 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2193 "Automatic GC selection pause threshold in milliseconds") \ 2194 \ 2195 product(bool, UseAdaptiveSizePolicy, true, \ 2196 "Use adaptive generation sizing policies") \ 2197 \ 2198 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2199 "Use adaptive survivor sizing policies") \ 2200 \ 2201 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2202 "Use adaptive young-old sizing policies at minor collections") \ 2203 \ 2204 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2205 "Use adaptive young-old sizing policies at major collections") \ 2206 \ 2207 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2208 "Include statistics from System.gc() for adaptive size policy") \ 2209 \ 2210 product(bool, UseAdaptiveGCBoundary, false, \ 2211 "Allow young-old boundary to move") \ 2212 \ 2213 develop(bool, TraceAdaptiveGCBoundary, false, \ 2214 "Trace young-old boundary moves") \ 2215 \ 2216 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2217 "Resize the virtual spaces of the young or old generations") \ 2218 range(-1, 1) \ 2219 \ 2220 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2221 "Policy for changing generation size for throughput goals") \ 2222 range(0, 1) \ 2223 \ 2224 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2225 "Number of steps where heuristics is used before data is used") \ 2226 \ 2227 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2228 "Number of collections before the adaptive sizing is started") \ 2229 \ 2230 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2231 "Collection interval for printing information; zero means never") \ 2232 \ 2233 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2234 "Use adaptive minimum footprint as a goal") \ 2235 \ 2236 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2237 "Weight given to exponential resizing, between 0 and 100") \ 2238 range(0, 100) \ 2239 \ 2240 product(uintx, AdaptiveTimeWeight, 25, \ 2241 "Weight given to time in adaptive policy, between 0 and 100") \ 2242 range(0, 100) \ 2243 \ 2244 product(uintx, PausePadding, 1, \ 2245 "How much buffer to keep for pause time") \ 2246 \ 2247 product(uintx, PromotedPadding, 3, \ 2248 "How much buffer to keep for promotion failure") \ 2249 \ 2250 product(uintx, SurvivorPadding, 3, \ 2251 "How much buffer to keep for survivor overflow") \ 2252 \ 2253 product(uintx, ThresholdTolerance, 10, \ 2254 "Allowed collection cost difference between generations") \ 2255 range(0, 100) \ 2256 \ 2257 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2258 "If collection costs are within margin, reduce both by full " \ 2259 "delta") \ 2260 \ 2261 product(uintx, YoungGenerationSizeIncrement, 20, \ 2262 "Adaptive size percentage change in young generation") \ 2263 range(0, 100) \ 2264 \ 2265 product(uintx, YoungGenerationSizeSupplement, 80, \ 2266 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2267 range(0, 100) \ 2268 \ 2269 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2270 "Decay factor to YoungedGenerationSizeSupplement") \ 2271 range(1, max_uintx) \ 2272 \ 2273 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2274 "Adaptive size percentage change in tenured generation") \ 2275 range(0, 100) \ 2276 \ 2277 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2278 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2279 range(0, 100) \ 2280 \ 2281 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2282 "Decay factor to TenuredGenerationSizeIncrement") \ 2283 range(1, max_uintx) \ 2284 \ 2285 product(uintx, MaxGCPauseMillis, max_uintx, \ 2286 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2287 "or (G1 Only) the maximum GC time per MMU time slice") \ 2288 range(1, max_uintx) \ 2289 constraint(MaxGCPauseMillisConstraintFunc,AfterMemoryInit) \ 2290 \ 2291 product(uintx, GCPauseIntervalMillis, 0, \ 2292 "Time slice for MMU specification") \ 2293 constraint(GCPauseIntervalMillisConstraintFunc,AfterMemoryInit) \ 2294 \ 2295 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2296 "Adaptive size policy maximum GC minor pause time goal " \ 2297 "in millisecond") \ 2298 \ 2299 product(uintx, GCTimeRatio, 99, \ 2300 "Adaptive size policy application time to GC time ratio") \ 2301 \ 2302 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2303 "Adaptive size scale down factor for shrinking") \ 2304 range(1, max_uintx) \ 2305 \ 2306 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2307 "Adaptive size decays the major cost for long major intervals") \ 2308 \ 2309 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2310 "Time scale over which major costs decay") \ 2311 \ 2312 product(uintx, MinSurvivorRatio, 3, \ 2313 "Minimum ratio of young generation/survivor space size") \ 2314 range(3, max_uintx) \ 2315 \ 2316 product(uintx, InitialSurvivorRatio, 8, \ 2317 "Initial ratio of young generation/survivor space size") \ 2318 \ 2319 product(size_t, BaseFootPrintEstimate, 256*M, \ 2320 "Estimate of footprint other than Java Heap") \ 2321 \ 2322 product(bool, UseGCOverheadLimit, true, \ 2323 "Use policy to limit of proportion of time spent in GC " \ 2324 "before an OutOfMemory error is thrown") \ 2325 \ 2326 product(uintx, GCTimeLimit, 98, \ 2327 "Limit of the proportion of time spent in GC before " \ 2328 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2329 range(0, 100) \ 2330 \ 2331 product(uintx, GCHeapFreeLimit, 2, \ 2332 "Minimum percentage of free space after a full GC before an " \ 2333 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2334 range(0, 100) \ 2335 \ 2336 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2337 "Number of consecutive collections before gc time limit fires") \ 2338 range(1, max_uintx) \ 2339 \ 2340 product(bool, PrintAdaptiveSizePolicy, false, \ 2341 "Print information about AdaptiveSizePolicy") \ 2342 \ 2343 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2344 "How far ahead to prefetch destination area (<= 0 means off)") \ 2345 \ 2346 product(intx, PrefetchScanIntervalInBytes, -1, \ 2347 "How far ahead to prefetch scan area (<= 0 means off)") \ 2348 \ 2349 product(intx, PrefetchFieldsAhead, -1, \ 2350 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2351 \ 2352 diagnostic(bool, VerifySilently, false, \ 2353 "Do not print the verification progress") \ 2354 \ 2355 diagnostic(bool, VerifyDuringStartup, false, \ 2356 "Verify memory system before executing any Java code " \ 2357 "during VM initialization") \ 2358 \ 2359 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2360 "Verify system before exiting") \ 2361 \ 2362 diagnostic(bool, VerifyBeforeGC, false, \ 2363 "Verify memory system before GC") \ 2364 \ 2365 diagnostic(bool, VerifyAfterGC, false, \ 2366 "Verify memory system after GC") \ 2367 \ 2368 diagnostic(bool, VerifyDuringGC, false, \ 2369 "Verify memory system during GC (between phases)") \ 2370 \ 2371 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2372 "Enable parallel memory system verification") \ 2373 \ 2374 diagnostic(bool, DeferInitialCardMark, false, \ 2375 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2376 "may arise from new_pre_store_barrier") \ 2377 \ 2378 product(bool, UseCondCardMark, false, \ 2379 "Check for already marked card before updating card table") \ 2380 \ 2381 diagnostic(bool, VerifyRememberedSets, false, \ 2382 "Verify GC remembered sets") \ 2383 \ 2384 diagnostic(bool, VerifyObjectStartArray, true, \ 2385 "Verify GC object start array if verify before/after") \ 2386 \ 2387 product(bool, DisableExplicitGC, false, \ 2388 "Ignore calls to System.gc()") \ 2389 \ 2390 notproduct(bool, CheckMemoryInitialization, false, \ 2391 "Check memory initialization") \ 2392 \ 2393 diagnostic(bool, BindCMSThreadToCPU, false, \ 2394 "Bind CMS Thread to CPU if possible") \ 2395 \ 2396 diagnostic(uintx, CPUForCMSThread, 0, \ 2397 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2398 \ 2399 product(bool, BindGCTaskThreadsToCPUs, false, \ 2400 "Bind GCTaskThreads to CPUs if possible") \ 2401 \ 2402 product(bool, UseGCTaskAffinity, false, \ 2403 "Use worker affinity when asking for GCTasks") \ 2404 \ 2405 product(uintx, ProcessDistributionStride, 4, \ 2406 "Stride through processors when distributing processes") \ 2407 \ 2408 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2409 "Number of times the coordinator GC thread will sleep while " \ 2410 "yielding before giving up and resuming GC") \ 2411 \ 2412 product(uintx, CMSYieldSleepCount, 0, \ 2413 "Number of times a GC thread (minus the coordinator) " \ 2414 "will sleep while yielding before giving up and resuming GC") \ 2415 \ 2416 /* gc tracing */ \ 2417 manageable(bool, PrintGC, false, \ 2418 "Print message at garbage collection") \ 2419 \ 2420 manageable(bool, PrintGCDetails, false, \ 2421 "Print more details at garbage collection") \ 2422 \ 2423 manageable(bool, PrintGCDateStamps, false, \ 2424 "Print date stamps at garbage collection") \ 2425 \ 2426 manageable(bool, PrintGCTimeStamps, false, \ 2427 "Print timestamps at garbage collection") \ 2428 \ 2429 manageable(bool, PrintGCID, true, \ 2430 "Print an identifier for each garbage collection") \ 2431 \ 2432 product(bool, PrintGCTaskTimeStamps, false, \ 2433 "Print timestamps for individual gc worker thread tasks") \ 2434 \ 2435 develop(intx, ConcGCYieldTimeout, 0, \ 2436 "If non-zero, assert that GC threads yield within this " \ 2437 "number of milliseconds") \ 2438 range(0, max_intx) \ 2439 \ 2440 product(bool, PrintReferenceGC, false, \ 2441 "Print times spent handling reference objects during GC " \ 2442 "(enabled only when PrintGCDetails)") \ 2443 \ 2444 develop(bool, TraceReferenceGC, false, \ 2445 "Trace handling of soft/weak/final/phantom references") \ 2446 \ 2447 develop(bool, TraceFinalizerRegistration, false, \ 2448 "Trace registration of final references") \ 2449 \ 2450 notproduct(bool, TraceScavenge, false, \ 2451 "Trace scavenge") \ 2452 \ 2453 product(bool, IgnoreEmptyClassPaths, false, \ 2454 "Ignore empty path elements in -classpath") \ 2455 \ 2456 product(bool, TraceClassPaths, false, \ 2457 "Trace processing of class paths") \ 2458 \ 2459 product_rw(bool, TraceClassLoading, false, \ 2460 "Trace all classes loaded") \ 2461 \ 2462 product(bool, TraceClassLoadingPreorder, false, \ 2463 "Trace all classes loaded in order referenced (not loaded)") \ 2464 \ 2465 product_rw(bool, TraceClassUnloading, false, \ 2466 "Trace unloading of classes") \ 2467 \ 2468 product_rw(bool, TraceLoaderConstraints, false, \ 2469 "Trace loader constraints") \ 2470 \ 2471 develop(bool, TraceClassLoaderData, false, \ 2472 "Trace class loader loader_data lifetime") \ 2473 \ 2474 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2475 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2476 "Initial size of the boot class loader data metaspace") \ 2477 range(30*K, max_uintx/BytesPerWord) \ 2478 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 2479 \ 2480 product(bool, TraceYoungGenTime, false, \ 2481 "Trace accumulated time for young collection") \ 2482 \ 2483 product(bool, TraceOldGenTime, false, \ 2484 "Trace accumulated time for old collection") \ 2485 \ 2486 product(bool, PrintTenuringDistribution, false, \ 2487 "Print tenuring age information") \ 2488 \ 2489 product_rw(bool, PrintHeapAtGC, false, \ 2490 "Print heap layout before and after each GC") \ 2491 \ 2492 product_rw(bool, PrintHeapAtGCExtended, false, \ 2493 "Print extended information about the layout of the heap " \ 2494 "when -XX:+PrintHeapAtGC is set") \ 2495 \ 2496 product(bool, PrintHeapAtSIGBREAK, true, \ 2497 "Print heap layout in response to SIGBREAK") \ 2498 \ 2499 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2500 "Print a class histogram before any major stop-world GC") \ 2501 \ 2502 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2503 "Print a class histogram after any major stop-world GC") \ 2504 \ 2505 manageable(bool, PrintClassHistogram, false, \ 2506 "Print a histogram of class instances") \ 2507 \ 2508 develop(bool, TraceWorkGang, false, \ 2509 "Trace activities of work gangs") \ 2510 \ 2511 develop(bool, TraceBlockOffsetTable, false, \ 2512 "Print BlockOffsetTable maps") \ 2513 \ 2514 develop(bool, TraceCardTableModRefBS, false, \ 2515 "Print CardTableModRefBS maps") \ 2516 \ 2517 develop(bool, TraceGCTaskManager, false, \ 2518 "Trace actions of the GC task manager") \ 2519 \ 2520 develop(bool, TraceGCTaskQueue, false, \ 2521 "Trace actions of the GC task queues") \ 2522 \ 2523 diagnostic(bool, TraceGCTaskThread, false, \ 2524 "Trace actions of the GC task threads") \ 2525 \ 2526 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2527 "Print the time taken by each phase in ParallelOldGC " \ 2528 "(PrintGCDetails must also be enabled)") \ 2529 \ 2530 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2531 "Trace marking phase in ParallelOldGC") \ 2532 \ 2533 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2534 "Trace summary phase in ParallelOldGC") \ 2535 \ 2536 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2537 "Trace compaction phase in ParallelOldGC") \ 2538 \ 2539 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2540 "Trace dense prefix computation for ParallelOldGC") \ 2541 \ 2542 develop(bool, IgnoreLibthreadGPFault, false, \ 2543 "Suppress workaround for libthread GP fault") \ 2544 \ 2545 product(bool, PrintJNIGCStalls, false, \ 2546 "Print diagnostic message when GC is stalled " \ 2547 "by JNI critical section") \ 2548 \ 2549 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2550 "The percentage of the used heap that the instances of a class " \ 2551 "must occupy for the class to generate a trace event") \ 2552 range(0.0, 100.0) \ 2553 \ 2554 /* GC log rotation setting */ \ 2555 \ 2556 product(bool, UseGCLogFileRotation, false, \ 2557 "Rotate gclog files (for long running applications). It requires "\ 2558 "-Xloggc:<filename>") \ 2559 \ 2560 product(uintx, NumberOfGCLogFiles, 0, \ 2561 "Number of gclog files in rotation " \ 2562 "(default: 0, no rotation)") \ 2563 \ 2564 product(size_t, GCLogFileSize, 8*K, \ 2565 "GC log file size, requires UseGCLogFileRotation. " \ 2566 "Set to 0 to only trigger rotation via jcmd") \ 2567 \ 2568 /* JVMTI heap profiling */ \ 2569 \ 2570 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2571 "Trace JVMTI object tagging calls") \ 2572 \ 2573 diagnostic(bool, VerifyBeforeIteration, false, \ 2574 "Verify memory system before JVMTI iteration") \ 2575 \ 2576 /* compiler interface */ \ 2577 \ 2578 develop(bool, CIPrintCompilerName, false, \ 2579 "when CIPrint is active, print the name of the active compiler") \ 2580 \ 2581 diagnostic(bool, CIPrintCompileQueue, false, \ 2582 "display the contents of the compile queue whenever a " \ 2583 "compilation is enqueued") \ 2584 \ 2585 develop(bool, CIPrintRequests, false, \ 2586 "display every request for compilation") \ 2587 \ 2588 product(bool, CITime, false, \ 2589 "collect timing information for compilation") \ 2590 \ 2591 develop(bool, CITimeVerbose, false, \ 2592 "be more verbose in compilation timings") \ 2593 \ 2594 develop(bool, CITimeEach, false, \ 2595 "display timing information after each successful compilation") \ 2596 \ 2597 develop(bool, CICountOSR, false, \ 2598 "use a separate counter when assigning ids to osr compilations") \ 2599 \ 2600 develop(bool, CICompileNatives, true, \ 2601 "compile native methods if supported by the compiler") \ 2602 \ 2603 develop_pd(bool, CICompileOSR, \ 2604 "compile on stack replacement methods if supported by the " \ 2605 "compiler") \ 2606 \ 2607 develop(bool, CIPrintMethodCodes, false, \ 2608 "print method bytecodes of the compiled code") \ 2609 \ 2610 develop(bool, CIPrintTypeFlow, false, \ 2611 "print the results of ciTypeFlow analysis") \ 2612 \ 2613 develop(bool, CITraceTypeFlow, false, \ 2614 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2615 \ 2616 develop(intx, OSROnlyBCI, -1, \ 2617 "OSR only at this bci. Negative values mean exclude that bci") \ 2618 \ 2619 /* compiler */ \ 2620 \ 2621 /* notice: the max range value here is max_jint, not max_intx */ \ 2622 /* because of overflow issue */ \ 2623 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2624 "Number of compiler threads to run") \ 2625 range(0, max_jint) \ 2626 constraint(CICompilerCountConstraintFunc, AtParse) \ 2627 \ 2628 product(intx, CompilationPolicyChoice, 0, \ 2629 "which compilation policy (0-3)") \ 2630 range(0, 3) \ 2631 \ 2632 develop(bool, UseStackBanging, true, \ 2633 "use stack banging for stack overflow checks (required for " \ 2634 "proper StackOverflow handling; disable only to measure cost " \ 2635 "of stackbanging)") \ 2636 \ 2637 develop(bool, UseStrictFP, true, \ 2638 "use strict fp if modifier strictfp is set") \ 2639 \ 2640 develop(bool, GenerateSynchronizationCode, true, \ 2641 "generate locking/unlocking code for synchronized methods and " \ 2642 "monitors") \ 2643 \ 2644 develop(bool, GenerateCompilerNullChecks, true, \ 2645 "Generate explicit null checks for loads/stores/calls") \ 2646 \ 2647 develop(bool, GenerateRangeChecks, true, \ 2648 "Generate range checks for array accesses") \ 2649 \ 2650 develop_pd(bool, ImplicitNullChecks, \ 2651 "Generate code for implicit null checks") \ 2652 \ 2653 product_pd(bool, TrapBasedNullChecks, \ 2654 "Generate code for null checks that uses a cmp and trap " \ 2655 "instruction raising SIGTRAP. This is only used if an access to" \ 2656 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2657 "ImplicitNullChecks don't work (PPC64).") \ 2658 \ 2659 product(bool, PrintSafepointStatistics, false, \ 2660 "Print statistics about safepoint synchronization") \ 2661 \ 2662 product(intx, PrintSafepointStatisticsCount, 300, \ 2663 "Total number of safepoint statistics collected " \ 2664 "before printing them out") \ 2665 range(1, max_intx) \ 2666 \ 2667 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2668 "Print safepoint statistics only when safepoint takes " \ 2669 "more than PrintSafepointSatisticsTimeout in millis") \ 2670 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 2671 NOT_LP64(range(-1, max_intx)) \ 2672 \ 2673 product(bool, TraceSafepointCleanupTime, false, \ 2674 "Print the break down of clean up tasks performed during " \ 2675 "safepoint") \ 2676 \ 2677 product(bool, Inline, true, \ 2678 "Enable inlining") \ 2679 \ 2680 product(bool, ClipInlining, true, \ 2681 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2682 \ 2683 develop(bool, UseCHA, true, \ 2684 "Enable CHA") \ 2685 \ 2686 product(bool, UseTypeProfile, true, \ 2687 "Check interpreter profile for historically monomorphic calls") \ 2688 \ 2689 diagnostic(bool, PrintInlining, false, \ 2690 "Print inlining optimizations") \ 2691 \ 2692 product(bool, UsePopCountInstruction, false, \ 2693 "Use population count instruction") \ 2694 \ 2695 develop(bool, EagerInitialization, false, \ 2696 "Eagerly initialize classes if possible") \ 2697 \ 2698 diagnostic(bool, LogTouchedMethods, false, \ 2699 "Log methods which have been ever touched in runtime") \ 2700 \ 2701 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 2702 "Print all methods that have been ever touched in runtime") \ 2703 \ 2704 develop(bool, TraceMethodReplacement, false, \ 2705 "Print when methods are replaced do to recompilation") \ 2706 \ 2707 develop(bool, PrintMethodFlushing, false, \ 2708 "Print the nmethods being flushed") \ 2709 \ 2710 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2711 "print statistics about method flushing") \ 2712 \ 2713 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2714 "Number of compiled code invocations after which " \ 2715 "the method is considered as hot by the flusher") \ 2716 range(1, max_jint) \ 2717 \ 2718 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2719 "Minimum number of sweeper passes before an nmethod " \ 2720 "can be flushed") \ 2721 range(0, max_intx) \ 2722 \ 2723 product(bool, UseCodeAging, true, \ 2724 "Insert counter to detect warm methods") \ 2725 \ 2726 diagnostic(bool, StressCodeAging, false, \ 2727 "Start with counters compiled in") \ 2728 \ 2729 develop(bool, UseRelocIndex, false, \ 2730 "Use an index to speed random access to relocations") \ 2731 \ 2732 develop(bool, StressCodeBuffers, false, \ 2733 "Exercise code buffer expansion and other rare state changes") \ 2734 \ 2735 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2736 "Generate extra debugging information for non-safepoints in " \ 2737 "nmethods") \ 2738 \ 2739 product(bool, PrintVMOptions, false, \ 2740 "Print flags that appeared on the command line") \ 2741 \ 2742 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2743 "Ignore unrecognized VM options") \ 2744 \ 2745 product(bool, PrintCommandLineFlags, false, \ 2746 "Print flags specified on command line or set by ergonomics") \ 2747 \ 2748 product(bool, PrintFlagsInitial, false, \ 2749 "Print all VM flags before argument processing and exit VM") \ 2750 \ 2751 product(bool, PrintFlagsFinal, false, \ 2752 "Print all VM flags after argument and ergonomic processing") \ 2753 \ 2754 notproduct(bool, PrintFlagsWithComments, false, \ 2755 "Print all VM flags with default values and descriptions and " \ 2756 "exit") \ 2757 \ 2758 product(bool, PrintFlagsRanges, false, \ 2759 "Print VM flags and their ranges and exit VM") \ 2760 \ 2761 diagnostic(bool, SerializeVMOutput, true, \ 2762 "Use a mutex to serialize output to tty and LogFile") \ 2763 \ 2764 diagnostic(bool, DisplayVMOutput, true, \ 2765 "Display all VM output on the tty, independently of LogVMOutput") \ 2766 \ 2767 diagnostic(bool, LogVMOutput, false, \ 2768 "Save VM output to LogFile") \ 2769 \ 2770 diagnostic(ccstr, LogFile, NULL, \ 2771 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2772 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2773 \ 2774 product(ccstr, ErrorFile, NULL, \ 2775 "If an error occurs, save the error data to this file " \ 2776 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2777 \ 2778 product(bool, DisplayVMOutputToStderr, false, \ 2779 "If DisplayVMOutput is true, display all VM output to stderr") \ 2780 \ 2781 product(bool, DisplayVMOutputToStdout, false, \ 2782 "If DisplayVMOutput is true, display all VM output to stdout") \ 2783 \ 2784 product(bool, UseHeavyMonitors, false, \ 2785 "use heavyweight instead of lightweight Java monitors") \ 2786 \ 2787 product(bool, PrintStringTableStatistics, false, \ 2788 "print statistics about the StringTable and SymbolTable") \ 2789 \ 2790 diagnostic(bool, VerifyStringTableAtExit, false, \ 2791 "verify StringTable contents at exit") \ 2792 \ 2793 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2794 "print histogram of the symbol table") \ 2795 \ 2796 notproduct(bool, ExitVMOnVerifyError, false, \ 2797 "standard exit from VM if bytecode verify error " \ 2798 "(only in debug mode)") \ 2799 \ 2800 diagnostic(ccstr, AbortVMOnException, NULL, \ 2801 "Call fatal if this exception is thrown. Example: " \ 2802 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2803 \ 2804 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 2805 "Call fatal if the exception pointed by AbortVMOnException " \ 2806 "has this message") \ 2807 \ 2808 develop(bool, DebugVtables, false, \ 2809 "add debugging code to vtable dispatch") \ 2810 \ 2811 develop(bool, PrintVtables, false, \ 2812 "print vtables when printing klass") \ 2813 \ 2814 notproduct(bool, PrintVtableStats, false, \ 2815 "print vtables stats at end of run") \ 2816 \ 2817 develop(bool, TraceCreateZombies, false, \ 2818 "trace creation of zombie nmethods") \ 2819 \ 2820 notproduct(bool, IgnoreLockingAssertions, false, \ 2821 "disable locking assertions (for speed)") \ 2822 \ 2823 product(bool, RangeCheckElimination, true, \ 2824 "Eliminate range checks") \ 2825 \ 2826 develop_pd(bool, UncommonNullCast, \ 2827 "track occurrences of null in casts; adjust compiler tactics") \ 2828 \ 2829 develop(bool, TypeProfileCasts, true, \ 2830 "treat casts like calls for purposes of type profiling") \ 2831 \ 2832 develop(bool, DelayCompilationDuringStartup, true, \ 2833 "Delay invoking the compiler until main application class is " \ 2834 "loaded") \ 2835 \ 2836 develop(bool, CompileTheWorld, false, \ 2837 "Compile all methods in all classes in bootstrap class path " \ 2838 "(stress test)") \ 2839 \ 2840 develop(bool, CompileTheWorldPreloadClasses, true, \ 2841 "Preload all classes used by a class before start loading") \ 2842 \ 2843 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2844 "Force a safepoint every n compiles so sweeper can keep up") \ 2845 \ 2846 develop(bool, FillDelaySlots, true, \ 2847 "Fill delay slots (on SPARC only)") \ 2848 \ 2849 develop(bool, TimeLivenessAnalysis, false, \ 2850 "Time computation of bytecode liveness analysis") \ 2851 \ 2852 develop(bool, TraceLivenessGen, false, \ 2853 "Trace the generation of liveness analysis information") \ 2854 \ 2855 notproduct(bool, TraceLivenessQuery, false, \ 2856 "Trace queries of liveness analysis information") \ 2857 \ 2858 notproduct(bool, CollectIndexSetStatistics, false, \ 2859 "Collect information about IndexSets") \ 2860 \ 2861 develop(bool, UseLoopSafepoints, true, \ 2862 "Generate Safepoint nodes in every loop") \ 2863 \ 2864 develop(intx, FastAllocateSizeLimit, 128*K, \ 2865 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2866 "Inline allocations larger than this in doublewords must go slow")\ 2867 \ 2868 product(bool, AggressiveOpts, false, \ 2869 "Enable aggressive optimizations - see arguments.cpp") \ 2870 \ 2871 product_pd(bool, CompactStrings, \ 2872 "Enable Strings to use single byte chars in backing store") \ 2873 \ 2874 product_pd(uintx, TypeProfileLevel, \ 2875 "=XYZ, with Z: Type profiling of arguments at call; " \ 2876 "Y: Type profiling of return value at call; " \ 2877 "X: Type profiling of parameters to methods; " \ 2878 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2879 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 2880 \ 2881 product(intx, TypeProfileArgsLimit, 2, \ 2882 "max number of call arguments to consider for type profiling") \ 2883 range(0, 16) \ 2884 \ 2885 product(intx, TypeProfileParmsLimit, 2, \ 2886 "max number of incoming parameters to consider for type profiling"\ 2887 ", -1 for all") \ 2888 range(-1, 64) \ 2889 \ 2890 /* statistics */ \ 2891 develop(bool, CountCompiledCalls, false, \ 2892 "Count method invocations") \ 2893 \ 2894 notproduct(bool, CountRuntimeCalls, false, \ 2895 "Count VM runtime calls") \ 2896 \ 2897 develop(bool, CountJNICalls, false, \ 2898 "Count jni method invocations") \ 2899 \ 2900 notproduct(bool, CountJVMCalls, false, \ 2901 "Count jvm method invocations") \ 2902 \ 2903 notproduct(bool, CountRemovableExceptions, false, \ 2904 "Count exceptions that could be replaced by branches due to " \ 2905 "inlining") \ 2906 \ 2907 notproduct(bool, ICMissHistogram, false, \ 2908 "Produce histogram of IC misses") \ 2909 \ 2910 /* interpreter */ \ 2911 develop(bool, ClearInterpreterLocals, false, \ 2912 "Always clear local variables of interpreter activations upon " \ 2913 "entry") \ 2914 \ 2915 product_pd(bool, RewriteBytecodes, \ 2916 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2917 \ 2918 product_pd(bool, RewriteFrequentPairs, \ 2919 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2920 \ 2921 diagnostic(bool, PrintInterpreter, false, \ 2922 "Print the generated interpreter code") \ 2923 \ 2924 product(bool, UseInterpreter, true, \ 2925 "Use interpreter for non-compiled methods") \ 2926 \ 2927 develop(bool, UseFastSignatureHandlers, true, \ 2928 "Use fast signature handlers for native calls") \ 2929 \ 2930 product(bool, UseLoopCounter, true, \ 2931 "Increment invocation counter on backward branch") \ 2932 \ 2933 product_pd(bool, UseOnStackReplacement, \ 2934 "Use on stack replacement, calls runtime if invoc. counter " \ 2935 "overflows in loop") \ 2936 \ 2937 notproduct(bool, TraceOnStackReplacement, false, \ 2938 "Trace on stack replacement") \ 2939 \ 2940 product_pd(bool, PreferInterpreterNativeStubs, \ 2941 "Use always interpreter stubs for native methods invoked via " \ 2942 "interpreter") \ 2943 \ 2944 develop(bool, CountBytecodes, false, \ 2945 "Count number of bytecodes executed") \ 2946 \ 2947 develop(bool, PrintBytecodeHistogram, false, \ 2948 "Print histogram of the executed bytecodes") \ 2949 \ 2950 develop(bool, PrintBytecodePairHistogram, false, \ 2951 "Print histogram of the executed bytecode pairs") \ 2952 \ 2953 diagnostic(bool, PrintSignatureHandlers, false, \ 2954 "Print code generated for native method signature handlers") \ 2955 \ 2956 develop(bool, VerifyOops, false, \ 2957 "Do plausibility checks for oops") \ 2958 \ 2959 develop(bool, CheckUnhandledOops, false, \ 2960 "Check for unhandled oops in VM code") \ 2961 \ 2962 develop(bool, VerifyJNIFields, trueInDebug, \ 2963 "Verify jfieldIDs for instance fields") \ 2964 \ 2965 notproduct(bool, VerifyJNIEnvThread, false, \ 2966 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2967 "from JNI") \ 2968 \ 2969 develop(bool, VerifyFPU, false, \ 2970 "Verify FPU state (check for NaN's, etc.)") \ 2971 \ 2972 develop(bool, VerifyThread, false, \ 2973 "Watch the thread register for corruption (SPARC only)") \ 2974 \ 2975 develop(bool, VerifyActivationFrameSize, false, \ 2976 "Verify that activation frame didn't become smaller than its " \ 2977 "minimal size") \ 2978 \ 2979 develop(bool, TraceFrequencyInlining, false, \ 2980 "Trace frequency based inlining") \ 2981 \ 2982 develop_pd(bool, InlineIntrinsics, \ 2983 "Inline intrinsics that can be statically resolved") \ 2984 \ 2985 product_pd(bool, ProfileInterpreter, \ 2986 "Profile at the bytecode level during interpretation") \ 2987 \ 2988 develop(bool, TraceProfileInterpreter, false, \ 2989 "Trace profiling at the bytecode level during interpretation. " \ 2990 "This outputs the profiling information collected to improve " \ 2991 "jit compilation.") \ 2992 \ 2993 develop_pd(bool, ProfileTraps, \ 2994 "Profile deoptimization traps at the bytecode level") \ 2995 \ 2996 product(intx, ProfileMaturityPercentage, 20, \ 2997 "number of method invocations/branches (expressed as % of " \ 2998 "CompileThreshold) before using the method's profile") \ 2999 range(0, 100) \ 3000 \ 3001 diagnostic(bool, PrintMethodData, false, \ 3002 "Print the results of +ProfileInterpreter at end of run") \ 3003 \ 3004 develop(bool, VerifyDataPointer, trueInDebug, \ 3005 "Verify the method data pointer during interpreter profiling") \ 3006 \ 3007 develop(bool, VerifyCompiledCode, false, \ 3008 "Include miscellaneous runtime verifications in nmethod code; " \ 3009 "default off because it disturbs nmethod size heuristics") \ 3010 \ 3011 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 3012 "Manually make GC thread crash then dump java stack trace; " \ 3013 "Test only") \ 3014 \ 3015 /* compilation */ \ 3016 product(bool, UseCompiler, true, \ 3017 "Use Just-In-Time compilation") \ 3018 \ 3019 develop(bool, TraceCompilationPolicy, false, \ 3020 "Trace compilation policy") \ 3021 \ 3022 develop(bool, TimeCompilationPolicy, false, \ 3023 "Time the compilation policy") \ 3024 \ 3025 product(bool, UseCounterDecay, true, \ 3026 "Adjust recompilation counters") \ 3027 \ 3028 develop(intx, CounterHalfLifeTime, 30, \ 3029 "Half-life time of invocation counters (in seconds)") \ 3030 \ 3031 develop(intx, CounterDecayMinIntervalLength, 500, \ 3032 "The minimum interval (in milliseconds) between invocation of " \ 3033 "CounterDecay") \ 3034 \ 3035 product(bool, AlwaysCompileLoopMethods, false, \ 3036 "When using recompilation, never interpret methods " \ 3037 "containing loops") \ 3038 \ 3039 product(bool, DontCompileHugeMethods, true, \ 3040 "Do not compile methods > HugeMethodLimit") \ 3041 \ 3042 /* Bytecode escape analysis estimation. */ \ 3043 product(bool, EstimateArgEscape, true, \ 3044 "Analyze bytecodes to estimate escape state of arguments") \ 3045 \ 3046 product(intx, BCEATraceLevel, 0, \ 3047 "How much tracing to do of bytecode escape analysis estimates " \ 3048 "(0-3)") \ 3049 range(0, 3) \ 3050 \ 3051 product(intx, MaxBCEAEstimateLevel, 5, \ 3052 "Maximum number of nested calls that are analyzed by BC EA") \ 3053 range(0, max_jint) \ 3054 \ 3055 product(intx, MaxBCEAEstimateSize, 150, \ 3056 "Maximum bytecode size of a method to be analyzed by BC EA") \ 3057 range(0, max_jint) \ 3058 \ 3059 product(intx, AllocatePrefetchStyle, 1, \ 3060 "0 = no prefetch, " \ 3061 "1 = prefetch instructions for each allocation, " \ 3062 "2 = use TLAB watermark to gate allocation prefetch, " \ 3063 "3 = use BIS instruction on Sparc for allocation prefetch") \ 3064 range(0, 3) \ 3065 \ 3066 product(intx, AllocatePrefetchDistance, -1, \ 3067 "Distance to prefetch ahead of allocation pointer. " \ 3068 "-1: use system-specific value (automatically determined") \ 3069 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 3070 \ 3071 product(intx, AllocatePrefetchLines, 3, \ 3072 "Number of lines to prefetch ahead of array allocation pointer") \ 3073 range(1, max_jint / 2) \ 3074 \ 3075 product(intx, AllocateInstancePrefetchLines, 1, \ 3076 "Number of lines to prefetch ahead of instance allocation " \ 3077 "pointer") \ 3078 range(1, max_jint / 2) \ 3079 \ 3080 product(intx, AllocatePrefetchStepSize, 16, \ 3081 "Step size in bytes of sequential prefetch instructions") \ 3082 range(1, max_jint) \ 3083 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 3084 \ 3085 product(intx, AllocatePrefetchInstr, 0, \ 3086 "Prefetch instruction to prefetch ahead of allocation pointer") \ 3087 constraint(AllocatePrefetchInstrConstraintFunc, AfterErgo) \ 3088 \ 3089 /* deoptimization */ \ 3090 develop(bool, TraceDeoptimization, false, \ 3091 "Trace deoptimization") \ 3092 \ 3093 develop(bool, PrintDeoptimizationDetails, false, \ 3094 "Print more information about deoptimization") \ 3095 \ 3096 develop(bool, DebugDeoptimization, false, \ 3097 "Tracing various information while debugging deoptimization") \ 3098 \ 3099 product(intx, SelfDestructTimer, 0, \ 3100 "Will cause VM to terminate after a given time (in minutes) " \ 3101 "(0 means off)") \ 3102 range(0, max_intx) \ 3103 \ 3104 product(intx, MaxJavaStackTraceDepth, 1024, \ 3105 "The maximum number of lines in the stack trace for Java " \ 3106 "exceptions (0 means all)") \ 3107 range(0, max_jint/2) \ 3108 \ 3109 develop(bool, TraceStackWalk, false, \ 3110 "Trace stack walking") \ 3111 \ 3112 product(bool, MemberNameInStackFrame, true, \ 3113 "Use MemberName in StackFrame") \ 3114 \ 3115 /* notice: the max range value here is max_jint, not max_intx */ \ 3116 /* because of overflow issue */ \ 3117 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 3118 "Guarantee a safepoint (at least) every so many milliseconds " \ 3119 "(0 means none)")) \ 3120 NOT_EMBEDDED(range(0, max_jint)) \ 3121 \ 3122 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 3123 "Guarantee a safepoint (at least) every so many milliseconds " \ 3124 "(0 means none)")) \ 3125 EMBEDDED_ONLY(range(0, max_jint)) \ 3126 \ 3127 product(intx, SafepointTimeoutDelay, 10000, \ 3128 "Delay in milliseconds for option SafepointTimeout") \ 3129 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 3130 NOT_LP64(range(0, max_intx)) \ 3131 \ 3132 product(intx, NmethodSweepActivity, 10, \ 3133 "Removes cold nmethods from code cache if > 0. Higher values " \ 3134 "result in more aggressive sweeping") \ 3135 range(0, 2000) \ 3136 \ 3137 notproduct(bool, LogSweeper, false, \ 3138 "Keep a ring buffer of sweeper activity") \ 3139 \ 3140 notproduct(intx, SweeperLogEntries, 1024, \ 3141 "Number of records in the ring buffer of sweeper activity") \ 3142 \ 3143 notproduct(intx, MemProfilingInterval, 500, \ 3144 "Time between each invocation of the MemProfiler") \ 3145 \ 3146 develop(intx, MallocCatchPtr, -1, \ 3147 "Hit breakpoint when mallocing/freeing this pointer") \ 3148 \ 3149 notproduct(ccstrlist, SuppressErrorAt, "", \ 3150 "List of assertions (file:line) to muzzle") \ 3151 \ 3152 notproduct(size_t, HandleAllocationLimit, 1024, \ 3153 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 3154 "is used") \ 3155 \ 3156 develop(size_t, TotalHandleAllocationLimit, 1024, \ 3157 "Threshold for total handle allocation when " \ 3158 "+TraceHandleAllocation is used") \ 3159 \ 3160 develop(intx, StackPrintLimit, 100, \ 3161 "number of stack frames to print in VM-level stack dump") \ 3162 \ 3163 notproduct(intx, MaxElementPrintSize, 256, \ 3164 "maximum number of elements to print") \ 3165 \ 3166 notproduct(intx, MaxSubklassPrintSize, 4, \ 3167 "maximum number of subklasses to print when printing klass") \ 3168 \ 3169 product(intx, MaxInlineLevel, 9, \ 3170 "maximum number of nested calls that are inlined") \ 3171 range(0, max_jint) \ 3172 \ 3173 product(intx, MaxRecursiveInlineLevel, 1, \ 3174 "maximum number of nested recursive calls that are inlined") \ 3175 range(0, max_jint) \ 3176 \ 3177 develop(intx, MaxForceInlineLevel, 100, \ 3178 "maximum number of nested calls that are forced for inlining " \ 3179 "(using CompileCommand or marked w/ @ForceInline)") \ 3180 range(0, max_jint) \ 3181 \ 3182 product_pd(intx, InlineSmallCode, \ 3183 "Only inline already compiled methods if their code size is " \ 3184 "less than this") \ 3185 range(0, max_jint) \ 3186 \ 3187 product(intx, MaxInlineSize, 35, \ 3188 "The maximum bytecode size of a method to be inlined") \ 3189 range(0, max_jint) \ 3190 \ 3191 product_pd(intx, FreqInlineSize, \ 3192 "The maximum bytecode size of a frequent method to be inlined") \ 3193 range(0, max_jint) \ 3194 \ 3195 product(intx, MaxTrivialSize, 6, \ 3196 "The maximum bytecode size of a trivial method to be inlined") \ 3197 range(0, max_jint) \ 3198 \ 3199 product(intx, MinInliningThreshold, 250, \ 3200 "The minimum invocation count a method needs to have to be " \ 3201 "inlined") \ 3202 range(0, max_jint) \ 3203 \ 3204 develop(intx, MethodHistogramCutoff, 100, \ 3205 "The cutoff value for method invocation histogram (+CountCalls)") \ 3206 \ 3207 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3208 "Number of interpreted methods to show in profile") \ 3209 \ 3210 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 3211 "Number of compiled methods to show in profile") \ 3212 \ 3213 develop(intx, ProfilerNumberOfStubMethods, 25, \ 3214 "Number of stub methods to show in profile") \ 3215 \ 3216 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3217 "Number of runtime stub nodes to show in profile") \ 3218 \ 3219 product(intx, ProfileIntervalsTicks, 100, \ 3220 "Number of ticks between printing of interval profile " \ 3221 "(+ProfileIntervals)") \ 3222 range(0, max_intx) \ 3223 \ 3224 notproduct(intx, ScavengeALotInterval, 1, \ 3225 "Interval between which scavenge will occur with +ScavengeALot") \ 3226 \ 3227 notproduct(intx, FullGCALotInterval, 1, \ 3228 "Interval between which full gc will occur with +FullGCALot") \ 3229 \ 3230 notproduct(intx, FullGCALotStart, 0, \ 3231 "For which invocation to start FullGCAlot") \ 3232 \ 3233 notproduct(intx, FullGCALotDummies, 32*K, \ 3234 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3235 "to move") \ 3236 \ 3237 develop(intx, DontYieldALotInterval, 10, \ 3238 "Interval between which yields will be dropped (milliseconds)") \ 3239 \ 3240 develop(intx, MinSleepInterval, 1, \ 3241 "Minimum sleep() interval (milliseconds) when " \ 3242 "ConvertSleepToYield is off (used for Solaris)") \ 3243 \ 3244 develop(intx, ProfilerPCTickThreshold, 15, \ 3245 "Number of ticks in a PC buckets to be a hotspot") \ 3246 \ 3247 notproduct(intx, DeoptimizeALotInterval, 5, \ 3248 "Number of exits until DeoptimizeALot kicks in") \ 3249 \ 3250 notproduct(intx, ZombieALotInterval, 5, \ 3251 "Number of exits until ZombieALot kicks in") \ 3252 \ 3253 diagnostic(intx, MallocVerifyInterval, 0, \ 3254 "If non-zero, verify C heap after every N calls to " \ 3255 "malloc/realloc/free") \ 3256 range(0, max_intx) \ 3257 \ 3258 diagnostic(intx, MallocVerifyStart, 0, \ 3259 "If non-zero, start verifying C heap after Nth call to " \ 3260 "malloc/realloc/free") \ 3261 range(0, max_intx) \ 3262 \ 3263 diagnostic(uintx, MallocMaxTestWords, 0, \ 3264 "If non-zero, maximum number of words that malloc/realloc can " \ 3265 "allocate (for testing only)") \ 3266 range(0, max_uintx) \ 3267 \ 3268 product(intx, TypeProfileWidth, 2, \ 3269 "Number of receiver types to record in call/cast profile") \ 3270 range(0, 8) \ 3271 \ 3272 experimental(intx, MethodProfileWidth, 0, \ 3273 "Number of methods to record in call profile") \ 3274 \ 3275 develop(intx, BciProfileWidth, 2, \ 3276 "Number of return bci's to record in ret profile") \ 3277 \ 3278 product(intx, PerMethodRecompilationCutoff, 400, \ 3279 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3280 range(-1, max_intx) \ 3281 \ 3282 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3283 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3284 range(-1, max_intx) \ 3285 \ 3286 product(intx, PerMethodTrapLimit, 100, \ 3287 "Limit on traps (of one kind) in a method (includes inlines)") \ 3288 range(0, max_jint) \ 3289 \ 3290 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3291 "Limit on speculative traps (of one kind) in a method " \ 3292 "(includes inlines)") \ 3293 range(0, max_jint) \ 3294 \ 3295 product(intx, PerBytecodeTrapLimit, 4, \ 3296 "Limit on traps (of one kind) at a particular BCI") \ 3297 range(0, max_jint) \ 3298 \ 3299 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3300 "Extra method data trap entries for speculation") \ 3301 \ 3302 develop(intx, InlineFrequencyRatio, 20, \ 3303 "Ratio of call site execution to caller method invocation") \ 3304 range(0, max_jint) \ 3305 \ 3306 develop_pd(intx, InlineFrequencyCount, \ 3307 "Count of call site execution necessary to trigger frequent " \ 3308 "inlining") \ 3309 range(0, max_jint) \ 3310 \ 3311 develop(intx, InlineThrowCount, 50, \ 3312 "Force inlining of interpreted methods that throw this often") \ 3313 range(0, max_jint) \ 3314 \ 3315 develop(intx, InlineThrowMaxSize, 200, \ 3316 "Force inlining of throwing methods smaller than this") \ 3317 range(0, max_jint) \ 3318 \ 3319 develop(intx, ProfilerNodeSize, 1024, \ 3320 "Size in K to allocate for the Profile Nodes of each thread") \ 3321 range(0, 1024) \ 3322 \ 3323 /* gc parameters */ \ 3324 product(size_t, InitialHeapSize, 0, \ 3325 "Initial heap size (in bytes); zero means use ergonomics") \ 3326 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \ 3327 \ 3328 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3329 "Maximum heap size (in bytes)") \ 3330 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \ 3331 \ 3332 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3333 "Initial tenured generation size (in bytes)") \ 3334 \ 3335 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3336 "Initial new generation size (in bytes)") \ 3337 constraint(NewSizeConstraintFunc,AfterErgo) \ 3338 \ 3339 product(size_t, MaxNewSize, max_uintx, \ 3340 "Maximum new generation size (in bytes), max_uintx means set " \ 3341 "ergonomically") \ 3342 \ 3343 product(size_t, PretenureSizeThreshold, 0, \ 3344 "Maximum size in bytes of objects allocated in DefNew " \ 3345 "generation; zero means no maximum") \ 3346 \ 3347 product(size_t, MinTLABSize, 2*K, \ 3348 "Minimum allowed TLAB size (in bytes)") \ 3349 range(1, max_uintx) \ 3350 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \ 3351 \ 3352 product(size_t, TLABSize, 0, \ 3353 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3354 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \ 3355 \ 3356 product(size_t, YoungPLABSize, 4096, \ 3357 "Size of young gen promotion LAB's (in HeapWords)") \ 3358 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \ 3359 \ 3360 product(size_t, OldPLABSize, 1024, \ 3361 "Size of old gen promotion LAB's (in HeapWords), or Number " \ 3362 "of blocks to attempt to claim when refilling CMS LAB's") \ 3363 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \ 3364 \ 3365 product(uintx, TLABAllocationWeight, 35, \ 3366 "Allocation averaging weight") \ 3367 range(0, 100) \ 3368 \ 3369 /* Limit the lower bound of this flag to 1 as it is used */ \ 3370 /* in a division expression. */ \ 3371 product(uintx, TLABWasteTargetPercent, 1, \ 3372 "Percentage of Eden that can be wasted") \ 3373 range(1, 100) \ 3374 \ 3375 product(uintx, TLABRefillWasteFraction, 64, \ 3376 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3377 range(1, max_uintx) \ 3378 \ 3379 product(uintx, TLABWasteIncrement, 4, \ 3380 "Increment allowed waste at slow allocation") \ 3381 \ 3382 product(uintx, SurvivorRatio, 8, \ 3383 "Ratio of eden/survivor space size") \ 3384 range(1, max_uintx-2) \ 3385 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \ 3386 \ 3387 product(uintx, NewRatio, 2, \ 3388 "Ratio of old/new generation sizes") \ 3389 range(0, max_uintx-1) \ 3390 \ 3391 product_pd(size_t, NewSizeThreadIncrease, \ 3392 "Additional size added to desired new generation size per " \ 3393 "non-daemon thread (in bytes)") \ 3394 \ 3395 product_pd(size_t, MetaspaceSize, \ 3396 "Initial size of Metaspaces (in bytes)") \ 3397 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 3398 \ 3399 product(size_t, MaxMetaspaceSize, max_uintx, \ 3400 "Maximum size of Metaspaces (in bytes)") \ 3401 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 3402 \ 3403 product(size_t, CompressedClassSpaceSize, 1*G, \ 3404 "Maximum size of class area in Metaspace when compressed " \ 3405 "class pointers are used") \ 3406 range(1*M, 3*G) \ 3407 \ 3408 manageable(uintx, MinHeapFreeRatio, 40, \ 3409 "The minimum percentage of heap free after GC to avoid expansion."\ 3410 " For most GCs this applies to the old generation. In G1 and" \ 3411 " ParallelGC it applies to the whole heap.") \ 3412 range(0, 100) \ 3413 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 3414 \ 3415 manageable(uintx, MaxHeapFreeRatio, 70, \ 3416 "The maximum percentage of heap free after GC to avoid shrinking."\ 3417 " For most GCs this applies to the old generation. In G1 and" \ 3418 " ParallelGC it applies to the whole heap.") \ 3419 range(0, 100) \ 3420 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 3421 \ 3422 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3423 "Number of milliseconds per MB of free space in the heap") \ 3424 range(0, max_intx) \ 3425 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 3426 \ 3427 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3428 "The minimum change in heap space due to GC (in bytes)") \ 3429 \ 3430 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3431 "The minimum expansion of Metaspace (in bytes)") \ 3432 \ 3433 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3434 "The maximum percentage of Metaspace free after GC to avoid " \ 3435 "shrinking") \ 3436 range(0, 100) \ 3437 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3438 \ 3439 product(uintx, MinMetaspaceFreeRatio, 40, \ 3440 "The minimum percentage of Metaspace free after GC to avoid " \ 3441 "expansion") \ 3442 range(0, 99) \ 3443 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3444 \ 3445 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3446 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3447 \ 3448 product(uintx, QueuedAllocationWarningCount, 0, \ 3449 "Number of times an allocation that queues behind a GC " \ 3450 "will retry before printing a warning") \ 3451 \ 3452 diagnostic(uintx, VerifyGCStartAt, 0, \ 3453 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3454 \ 3455 diagnostic(intx, VerifyGCLevel, 0, \ 3456 "Generation level at which to start +VerifyBefore/AfterGC") \ 3457 range(0, 1) \ 3458 \ 3459 product(uintx, MaxTenuringThreshold, 15, \ 3460 "Maximum value for tenuring threshold") \ 3461 range(0, markOopDesc::max_age + 1) \ 3462 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \ 3463 \ 3464 product(uintx, InitialTenuringThreshold, 7, \ 3465 "Initial value for tenuring threshold") \ 3466 range(0, markOopDesc::max_age + 1) \ 3467 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \ 3468 \ 3469 product(uintx, TargetSurvivorRatio, 50, \ 3470 "Desired percentage of survivor space used after scavenge") \ 3471 range(0, 100) \ 3472 \ 3473 product(uintx, MarkSweepDeadRatio, 5, \ 3474 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3475 "Serial mark sweep treats this as both the minimum and maximum " \ 3476 "value. " \ 3477 "CMS uses this value only if it falls back to mark sweep. " \ 3478 "Par compact uses a variable scale based on the density of the " \ 3479 "generation and treats this as the maximum value when the heap " \ 3480 "is either completely full or completely empty. Par compact " \ 3481 "also has a smaller default value; see arguments.cpp.") \ 3482 range(0, 100) \ 3483 \ 3484 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3485 "How often should we fully compact the heap (ignoring the dead " \ 3486 "space parameters)") \ 3487 range(1, max_uintx) \ 3488 \ 3489 product(intx, PrintCMSStatistics, 0, \ 3490 "Statistics for CMS") \ 3491 \ 3492 product(bool, PrintCMSInitiationStatistics, false, \ 3493 "Statistics for initiating a CMS collection") \ 3494 \ 3495 product(intx, PrintFLSStatistics, 0, \ 3496 "Statistics for CMS' FreeListSpace") \ 3497 \ 3498 product(intx, PrintFLSCensus, 0, \ 3499 "Census for CMS' FreeListSpace") \ 3500 \ 3501 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3502 "Delay between expansion and allocation (in milliseconds)") \ 3503 \ 3504 develop(uintx, GCWorkerDelayMillis, 0, \ 3505 "Delay in scheduling GC workers (in milliseconds)") \ 3506 \ 3507 product(intx, DeferThrSuspendLoopCount, 4000, \ 3508 "(Unstable) Number of times to iterate in safepoint loop " \ 3509 "before blocking VM threads ") \ 3510 range(-1, max_jint-1) \ 3511 \ 3512 product(intx, DeferPollingPageLoopCount, -1, \ 3513 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3514 "before changing safepoint polling page to RO ") \ 3515 range(-1, max_jint-1) \ 3516 \ 3517 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3518 range(0, max_intx) \ 3519 \ 3520 product(bool, PSChunkLargeArrays, true, \ 3521 "Process large arrays in chunks") \ 3522 \ 3523 product(uintx, GCDrainStackTargetSize, 64, \ 3524 "Number of entries we will try to leave on the stack " \ 3525 "during parallel gc") \ 3526 \ 3527 /* stack parameters */ \ 3528 product_pd(intx, StackYellowPages, \ 3529 "Number of yellow zone (recoverable overflows) pages") \ 3530 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 3531 \ 3532 product_pd(intx, StackRedPages, \ 3533 "Number of red zone (unrecoverable overflows) pages") \ 3534 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 3535 \ 3536 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3537 product_pd(intx, StackShadowPages, \ 3538 "Number of shadow zone (for overflow checking) pages " \ 3539 "this should exceed the depth of the VM and native call stack") \ 3540 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 3541 \ 3542 product_pd(intx, ThreadStackSize, \ 3543 "Thread Stack Size (in Kbytes)") \ 3544 range(0, max_intx-os::vm_page_size()) \ 3545 \ 3546 product_pd(intx, VMThreadStackSize, \ 3547 "Non-Java Thread Stack Size (in Kbytes)") \ 3548 range(0, max_intx/(1 * K)) \ 3549 \ 3550 product_pd(intx, CompilerThreadStackSize, \ 3551 "Compiler Thread Stack Size (in Kbytes)") \ 3552 range(0, max_intx /(1 * K)) \ 3553 \ 3554 develop_pd(size_t, JVMInvokeMethodSlack, \ 3555 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3556 \ 3557 /* code cache parameters */ \ 3558 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3559 develop(uintx, CodeCacheSegmentSize, \ 3560 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)), \ 3561 "Code cache segment size (in bytes) - smallest unit of " \ 3562 "allocation") \ 3563 range(1, 1024) \ 3564 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 3565 \ 3566 develop_pd(intx, CodeEntryAlignment, \ 3567 "Code entry alignment for generated code (in bytes)") \ 3568 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 3569 \ 3570 product_pd(intx, OptoLoopAlignment, \ 3571 "Align inner loops to zero relative to this modulus") \ 3572 range(1, 16) \ 3573 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 3574 \ 3575 product_pd(uintx, InitialCodeCacheSize, \ 3576 "Initial code cache size (in bytes)") \ 3577 range(0, max_uintx) \ 3578 \ 3579 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3580 "Minimum code cache size (in bytes) required to start VM.") \ 3581 range(0, max_uintx) \ 3582 \ 3583 product(bool, SegmentedCodeCache, false, \ 3584 "Use a segmented code cache") \ 3585 \ 3586 product_pd(uintx, ReservedCodeCacheSize, \ 3587 "Reserved code cache size (in bytes) - maximum code cache size") \ 3588 range(0, max_uintx) \ 3589 \ 3590 product_pd(uintx, NonProfiledCodeHeapSize, \ 3591 "Size of code heap with non-profiled methods (in bytes)") \ 3592 range(0, max_uintx) \ 3593 \ 3594 product_pd(uintx, ProfiledCodeHeapSize, \ 3595 "Size of code heap with profiled methods (in bytes)") \ 3596 range(0, max_uintx) \ 3597 \ 3598 product_pd(uintx, NonNMethodCodeHeapSize, \ 3599 "Size of code heap with non-nmethods (in bytes)") \ 3600 range(0, max_uintx) \ 3601 \ 3602 product_pd(uintx, CodeCacheExpansionSize, \ 3603 "Code cache expansion size (in bytes)") \ 3604 range(0, max_uintx) \ 3605 \ 3606 develop_pd(uintx, CodeCacheMinBlockLength, \ 3607 "Minimum number of segments in a code cache block") \ 3608 range(1, 100) \ 3609 \ 3610 notproduct(bool, ExitOnFullCodeCache, false, \ 3611 "Exit the VM if we fill the code cache") \ 3612 \ 3613 product(bool, UseCodeCacheFlushing, true, \ 3614 "Remove cold/old nmethods from the code cache") \ 3615 \ 3616 product(uintx, StartAggressiveSweepingAt, 10, \ 3617 "Start aggressive sweeping if X[%] of the code cache is free." \ 3618 "Segmented code cache: X[%] of the non-profiled heap." \ 3619 "Non-segmented code cache: X[%] of the total code cache") \ 3620 range(0, 100) \ 3621 \ 3622 /* interpreter debugging */ \ 3623 develop(intx, BinarySwitchThreshold, 5, \ 3624 "Minimal number of lookupswitch entries for rewriting to binary " \ 3625 "switch") \ 3626 \ 3627 develop(intx, StopInterpreterAt, 0, \ 3628 "Stop interpreter execution at specified bytecode number") \ 3629 \ 3630 develop(intx, TraceBytecodesAt, 0, \ 3631 "Trace bytecodes starting with specified bytecode number") \ 3632 \ 3633 /* compiler interface */ \ 3634 develop(intx, CIStart, 0, \ 3635 "The id of the first compilation to permit") \ 3636 \ 3637 develop(intx, CIStop, max_jint, \ 3638 "The id of the last compilation to permit") \ 3639 \ 3640 develop(intx, CIStartOSR, 0, \ 3641 "The id of the first osr compilation to permit " \ 3642 "(CICountOSR must be on)") \ 3643 \ 3644 develop(intx, CIStopOSR, max_jint, \ 3645 "The id of the last osr compilation to permit " \ 3646 "(CICountOSR must be on)") \ 3647 \ 3648 develop(intx, CIBreakAtOSR, -1, \ 3649 "The id of osr compilation to break at") \ 3650 \ 3651 develop(intx, CIBreakAt, -1, \ 3652 "The id of compilation to break at") \ 3653 \ 3654 product(ccstrlist, CompileOnly, "", \ 3655 "List of methods (pkg/class.name) to restrict compilation to") \ 3656 \ 3657 product(ccstr, CompileCommandFile, NULL, \ 3658 "Read compiler commands from this file [.hotspot_compiler]") \ 3659 \ 3660 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 3661 "Read compiler directives from this file") \ 3662 \ 3663 product(ccstrlist, CompileCommand, "", \ 3664 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3665 \ 3666 develop(bool, ReplayCompiles, false, \ 3667 "Enable replay of compilations from ReplayDataFile") \ 3668 \ 3669 product(ccstr, ReplayDataFile, NULL, \ 3670 "File containing compilation replay information" \ 3671 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3672 \ 3673 product(ccstr, InlineDataFile, NULL, \ 3674 "File containing inlining replay information" \ 3675 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3676 \ 3677 develop(intx, ReplaySuppressInitializers, 2, \ 3678 "Control handling of class initialization during replay: " \ 3679 "0 - don't do anything special; " \ 3680 "1 - treat all class initializers as empty; " \ 3681 "2 - treat class initializers for application classes as empty; " \ 3682 "3 - allow all class initializers to run during bootstrap but " \ 3683 " pretend they are empty after starting replay") \ 3684 range(0, 3) \ 3685 \ 3686 develop(bool, ReplayIgnoreInitErrors, false, \ 3687 "Ignore exceptions thrown during initialization for replay") \ 3688 \ 3689 product(bool, DumpReplayDataOnError, true, \ 3690 "Record replay data for crashing compiler threads") \ 3691 \ 3692 product(bool, CICompilerCountPerCPU, false, \ 3693 "1 compiler thread for log(N CPUs)") \ 3694 \ 3695 develop(intx, CIFireOOMAt, -1, \ 3696 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3697 "(non-negative value throws OOM after this many CI accesses " \ 3698 "in each compile)") \ 3699 notproduct(intx, CICrashAt, -1, \ 3700 "id of compilation to trigger assert in compiler thread for " \ 3701 "the purpose of testing, e.g. generation of replay data") \ 3702 notproduct(bool, CIObjectFactoryVerify, false, \ 3703 "enable potentially expensive verification in ciObjectFactory") \ 3704 \ 3705 /* Priorities */ \ 3706 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3707 \ 3708 product(intx, ThreadPriorityPolicy, 0, \ 3709 "0 : Normal. "\ 3710 " VM chooses priorities that are appropriate for normal "\ 3711 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3712 " to normal native priority. Java priorities below " \ 3713 " NORM_PRIORITY map to lower native priority values. On "\ 3714 " Windows applications are allowed to use higher native "\ 3715 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3716 " not use the highest possible native priority, "\ 3717 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3718 " system threads. On Linux thread priorities are ignored "\ 3719 " because the OS does not support static priority in "\ 3720 " SCHED_OTHER scheduling class which is the only choice for "\ 3721 " non-root, non-realtime applications. "\ 3722 "1 : Aggressive. "\ 3723 " Java thread priorities map over to the entire range of "\ 3724 " native thread priorities. Higher Java thread priorities map "\ 3725 " to higher native thread priorities. This policy should be "\ 3726 " used with care, as sometimes it can cause performance "\ 3727 " degradation in the application and/or the entire system. On "\ 3728 " Linux this policy requires root privilege.") \ 3729 range(0, 1) \ 3730 \ 3731 product(bool, ThreadPriorityVerbose, false, \ 3732 "Print priority changes") \ 3733 \ 3734 product(intx, CompilerThreadPriority, -1, \ 3735 "The native priority at which compiler threads should run " \ 3736 "(-1 means no change)") \ 3737 range(min_jint, max_jint) \ 3738 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 3739 \ 3740 product(intx, VMThreadPriority, -1, \ 3741 "The native priority at which the VM thread should run " \ 3742 "(-1 means no change)") \ 3743 range(-1, 127) \ 3744 \ 3745 product(bool, CompilerThreadHintNoPreempt, true, \ 3746 "(Solaris only) Give compiler threads an extra quanta") \ 3747 \ 3748 product(bool, VMThreadHintNoPreempt, false, \ 3749 "(Solaris only) Give VM thread an extra quanta") \ 3750 \ 3751 product(intx, JavaPriority1_To_OSPriority, -1, \ 3752 "Map Java priorities to OS priorities") \ 3753 range(-1, 127) \ 3754 \ 3755 product(intx, JavaPriority2_To_OSPriority, -1, \ 3756 "Map Java priorities to OS priorities") \ 3757 range(-1, 127) \ 3758 \ 3759 product(intx, JavaPriority3_To_OSPriority, -1, \ 3760 "Map Java priorities to OS priorities") \ 3761 range(-1, 127) \ 3762 \ 3763 product(intx, JavaPriority4_To_OSPriority, -1, \ 3764 "Map Java priorities to OS priorities") \ 3765 range(-1, 127) \ 3766 \ 3767 product(intx, JavaPriority5_To_OSPriority, -1, \ 3768 "Map Java priorities to OS priorities") \ 3769 range(-1, 127) \ 3770 \ 3771 product(intx, JavaPriority6_To_OSPriority, -1, \ 3772 "Map Java priorities to OS priorities") \ 3773 range(-1, 127) \ 3774 \ 3775 product(intx, JavaPriority7_To_OSPriority, -1, \ 3776 "Map Java priorities to OS priorities") \ 3777 range(-1, 127) \ 3778 \ 3779 product(intx, JavaPriority8_To_OSPriority, -1, \ 3780 "Map Java priorities to OS priorities") \ 3781 range(-1, 127) \ 3782 \ 3783 product(intx, JavaPriority9_To_OSPriority, -1, \ 3784 "Map Java priorities to OS priorities") \ 3785 range(-1, 127) \ 3786 \ 3787 product(intx, JavaPriority10_To_OSPriority,-1, \ 3788 "Map Java priorities to OS priorities") \ 3789 range(-1, 127) \ 3790 \ 3791 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3792 "Java thread priority 10 maps to critical scheduling priority") \ 3793 \ 3794 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3795 "Compiler thread(s) run at critical scheduling priority") \ 3796 \ 3797 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3798 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3799 \ 3800 /* compiler debugging */ \ 3801 notproduct(intx, CompileTheWorldStartAt, 1, \ 3802 "First class to consider when using +CompileTheWorld") \ 3803 \ 3804 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3805 "Last class to consider when using +CompileTheWorld") \ 3806 \ 3807 develop(intx, NewCodeParameter, 0, \ 3808 "Testing Only: Create a dedicated integer parameter before " \ 3809 "putback") \ 3810 \ 3811 /* new oopmap storage allocation */ \ 3812 develop(intx, MinOopMapAllocation, 8, \ 3813 "Minimum number of OopMap entries in an OopMapSet") \ 3814 \ 3815 /* Background Compilation */ \ 3816 develop(intx, LongCompileThreshold, 50, \ 3817 "Used with +TraceLongCompiles") \ 3818 \ 3819 /* recompilation */ \ 3820 product_pd(intx, CompileThreshold, \ 3821 "number of interpreted method invocations before (re-)compiling") \ 3822 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 3823 \ 3824 product(double, CompileThresholdScaling, 1.0, \ 3825 "Factor to control when first compilation happens " \ 3826 "(both with and without tiered compilation): " \ 3827 "values greater than 1.0 delay counter overflow, " \ 3828 "values between 0 and 1.0 rush counter overflow, " \ 3829 "value of 1.0 leaves compilation thresholds unchanged " \ 3830 "value of 0.0 is equivalent to -Xint. " \ 3831 "" \ 3832 "Flag can be set as per-method option. " \ 3833 "If a value is specified for a method, compilation thresholds " \ 3834 "for that method are scaled by both the value of the global flag "\ 3835 "and the value of the per-method flag.") \ 3836 range(0.0, DBL_MAX) \ 3837 \ 3838 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3839 "Interpreter (tier 0) invocation notification frequency") \ 3840 range(0, 30) \ 3841 \ 3842 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3843 "C1 without MDO (tier 2) invocation notification frequency") \ 3844 range(0, 30) \ 3845 \ 3846 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3847 "C1 with MDO profiling (tier 3) invocation notification " \ 3848 "frequency") \ 3849 range(0, 30) \ 3850 \ 3851 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3852 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3853 range(0, 30) \ 3854 \ 3855 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3856 "Interpreter (tier 0) invocation notification frequency") \ 3857 range(0, 30) \ 3858 \ 3859 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3860 "C1 without MDO (tier 2) invocation notification frequency") \ 3861 range(0, 30) \ 3862 \ 3863 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3864 "C1 with MDO profiling (tier 3) invocation notification " \ 3865 "frequency") \ 3866 range(0, 30) \ 3867 \ 3868 product(intx, Tier2CompileThreshold, 0, \ 3869 "threshold at which tier 2 compilation is invoked") \ 3870 range(0, max_jint) \ 3871 \ 3872 product(intx, Tier2BackEdgeThreshold, 0, \ 3873 "Back edge threshold at which tier 2 compilation is invoked") \ 3874 range(0, max_jint) \ 3875 \ 3876 product(intx, Tier3InvocationThreshold, 200, \ 3877 "Compile if number of method invocations crosses this " \ 3878 "threshold") \ 3879 range(0, max_jint) \ 3880 \ 3881 product(intx, Tier3MinInvocationThreshold, 100, \ 3882 "Minimum invocation to compile at tier 3") \ 3883 range(0, max_jint) \ 3884 \ 3885 product(intx, Tier3CompileThreshold, 2000, \ 3886 "Threshold at which tier 3 compilation is invoked (invocation " \ 3887 "minimum must be satisfied)") \ 3888 range(0, max_jint) \ 3889 \ 3890 product(intx, Tier3BackEdgeThreshold, 60000, \ 3891 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3892 range(0, max_jint) \ 3893 \ 3894 product(intx, Tier4InvocationThreshold, 5000, \ 3895 "Compile if number of method invocations crosses this " \ 3896 "threshold") \ 3897 range(0, max_jint) \ 3898 \ 3899 product(intx, Tier4MinInvocationThreshold, 600, \ 3900 "Minimum invocation to compile at tier 4") \ 3901 range(0, max_jint) \ 3902 \ 3903 product(intx, Tier4CompileThreshold, 15000, \ 3904 "Threshold at which tier 4 compilation is invoked (invocation " \ 3905 "minimum must be satisfied") \ 3906 range(0, max_jint) \ 3907 \ 3908 product(intx, Tier4BackEdgeThreshold, 40000, \ 3909 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3910 range(0, max_jint) \ 3911 \ 3912 product(intx, Tier3DelayOn, 5, \ 3913 "If C2 queue size grows over this amount per compiler thread " \ 3914 "stop compiling at tier 3 and start compiling at tier 2") \ 3915 range(0, max_jint) \ 3916 \ 3917 product(intx, Tier3DelayOff, 2, \ 3918 "If C2 queue size is less than this amount per compiler thread " \ 3919 "allow methods compiled at tier 2 transition to tier 3") \ 3920 range(0, max_jint) \ 3921 \ 3922 product(intx, Tier3LoadFeedback, 5, \ 3923 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3924 "reaches this amount per compiler thread") \ 3925 range(0, max_jint) \ 3926 \ 3927 product(intx, Tier4LoadFeedback, 3, \ 3928 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3929 "reaches this amount per compiler thread") \ 3930 range(0, max_jint) \ 3931 \ 3932 product(intx, TieredCompileTaskTimeout, 50, \ 3933 "Kill compile task if method was not used within " \ 3934 "given timeout in milliseconds") \ 3935 range(0, max_intx) \ 3936 \ 3937 product(intx, TieredStopAtLevel, 4, \ 3938 "Stop at given compilation level") \ 3939 range(0, 4) \ 3940 \ 3941 product(intx, Tier0ProfilingStartPercentage, 200, \ 3942 "Start profiling in interpreter if the counters exceed tier 3 " \ 3943 "thresholds by the specified percentage") \ 3944 range(0, max_jint) \ 3945 \ 3946 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3947 "Increase the compile threshold for C1 compilation if the code " \ 3948 "cache is filled by the specified percentage") \ 3949 range(0, 99) \ 3950 \ 3951 product(intx, TieredRateUpdateMinTime, 1, \ 3952 "Minimum rate sampling interval (in milliseconds)") \ 3953 range(0, max_intx) \ 3954 \ 3955 product(intx, TieredRateUpdateMaxTime, 25, \ 3956 "Maximum rate sampling interval (in milliseconds)") \ 3957 range(0, max_intx) \ 3958 \ 3959 product_pd(bool, TieredCompilation, \ 3960 "Enable tiered compilation") \ 3961 \ 3962 product(bool, PrintTieredEvents, false, \ 3963 "Print tiered events notifications") \ 3964 \ 3965 product_pd(intx, OnStackReplacePercentage, \ 3966 "NON_TIERED number of method invocations/branches (expressed as " \ 3967 "% of CompileThreshold) before (re-)compiling OSR code") \ 3968 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 3969 \ 3970 product(intx, InterpreterProfilePercentage, 33, \ 3971 "NON_TIERED number of method invocations/branches (expressed as " \ 3972 "% of CompileThreshold) before profiling in the interpreter") \ 3973 range(0, 100) \ 3974 \ 3975 develop(intx, MaxRecompilationSearchLength, 10, \ 3976 "The maximum number of frames to inspect when searching for " \ 3977 "recompilee") \ 3978 \ 3979 develop(intx, MaxInterpretedSearchLength, 3, \ 3980 "The maximum number of interpreted frames to skip when searching "\ 3981 "for recompilee") \ 3982 \ 3983 develop(intx, DesiredMethodLimit, 8000, \ 3984 "The desired maximum method size (in bytecodes) after inlining") \ 3985 \ 3986 develop(intx, HugeMethodLimit, 8000, \ 3987 "Don't compile methods larger than this if " \ 3988 "+DontCompileHugeMethods") \ 3989 \ 3990 /* New JDK 1.4 reflection implementation */ \ 3991 \ 3992 develop(intx, FastSuperclassLimit, 8, \ 3993 "Depth of hardwired instanceof accelerator array") \ 3994 \ 3995 /* Properties for Java libraries */ \ 3996 \ 3997 product(size_t, MaxDirectMemorySize, 0, \ 3998 "Maximum total size of NIO direct-buffer allocations") \ 3999 range(0, (size_t)SIZE_MAX) \ 4000 \ 4001 /* Flags used for temporary code during development */ \ 4002 \ 4003 diagnostic(bool, UseNewCode, false, \ 4004 "Testing Only: Use the new version while testing") \ 4005 \ 4006 diagnostic(bool, UseNewCode2, false, \ 4007 "Testing Only: Use the new version while testing") \ 4008 \ 4009 diagnostic(bool, UseNewCode3, false, \ 4010 "Testing Only: Use the new version while testing") \ 4011 \ 4012 /* flags for performance data collection */ \ 4013 \ 4014 product(bool, UsePerfData, falseInEmbedded, \ 4015 "Flag to disable jvmstat instrumentation for performance testing "\ 4016 "and problem isolation purposes") \ 4017 \ 4018 product(bool, PerfDataSaveToFile, false, \ 4019 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 4020 \ 4021 product(ccstr, PerfDataSaveFile, NULL, \ 4022 "Save PerfData memory to the specified absolute pathname. " \ 4023 "The string %p in the file name (if present) " \ 4024 "will be replaced by pid") \ 4025 \ 4026 product(intx, PerfDataSamplingInterval, 50, \ 4027 "Data sampling interval (in milliseconds)") \ 4028 range(PeriodicTask::min_interval, max_jint) \ 4029 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 4030 \ 4031 develop(bool, PerfTraceDataCreation, false, \ 4032 "Trace creation of Performance Data Entries") \ 4033 \ 4034 develop(bool, PerfTraceMemOps, false, \ 4035 "Trace PerfMemory create/attach/detach calls") \ 4036 \ 4037 product(bool, PerfDisableSharedMem, false, \ 4038 "Store performance data in standard memory") \ 4039 \ 4040 product(intx, PerfDataMemorySize, 64*K, \ 4041 "Size of performance data memory region. Will be rounded " \ 4042 "up to a multiple of the native os page size.") \ 4043 range(128, 32*64*K) \ 4044 \ 4045 product(intx, PerfMaxStringConstLength, 1024, \ 4046 "Maximum PerfStringConstant string length before truncation") \ 4047 range(32, 32*K) \ 4048 \ 4049 product(bool, PerfAllowAtExitRegistration, false, \ 4050 "Allow registration of atexit() methods") \ 4051 \ 4052 product(bool, PerfBypassFileSystemCheck, false, \ 4053 "Bypass Win32 file system criteria checks (Windows Only)") \ 4054 \ 4055 product(intx, UnguardOnExecutionViolation, 0, \ 4056 "Unguard page and retry on no-execute fault (Win32 only) " \ 4057 "0=off, 1=conservative, 2=aggressive") \ 4058 range(0, 2) \ 4059 \ 4060 /* Serviceability Support */ \ 4061 \ 4062 product(bool, ManagementServer, false, \ 4063 "Create JMX Management Server") \ 4064 \ 4065 product(bool, DisableAttachMechanism, false, \ 4066 "Disable mechanism that allows tools to attach to this VM") \ 4067 \ 4068 product(bool, StartAttachListener, false, \ 4069 "Always start Attach Listener at VM startup") \ 4070 \ 4071 manageable(bool, PrintConcurrentLocks, false, \ 4072 "Print java.util.concurrent locks in thread dump") \ 4073 \ 4074 product(bool, TransmitErrorReport, false, \ 4075 "Enable error report transmission on erroneous termination") \ 4076 \ 4077 product(ccstr, ErrorReportServer, NULL, \ 4078 "Override built-in error report server address") \ 4079 \ 4080 /* Shared spaces */ \ 4081 \ 4082 product(bool, UseSharedSpaces, true, \ 4083 "Use shared spaces for metadata") \ 4084 \ 4085 product(bool, VerifySharedSpaces, false, \ 4086 "Verify shared spaces (false for default archive, true for " \ 4087 "archive specified by -XX:SharedArchiveFile)") \ 4088 \ 4089 product(bool, RequireSharedSpaces, false, \ 4090 "Require shared spaces for metadata") \ 4091 \ 4092 product(bool, DumpSharedSpaces, false, \ 4093 "Special mode: JVM reads a class list, loads classes, builds " \ 4094 "shared spaces, and dumps the shared spaces to a file to be " \ 4095 "used in future JVM runs") \ 4096 \ 4097 product(bool, PrintSharedSpaces, false, \ 4098 "Print usage of shared spaces") \ 4099 \ 4100 product(bool, PrintSharedArchiveAndExit, false, \ 4101 "Print shared archive file contents") \ 4102 \ 4103 product(bool, PrintSharedDictionary, false, \ 4104 "If PrintSharedArchiveAndExit is true, also print the shared " \ 4105 "dictionary") \ 4106 \ 4107 product(size_t, SharedReadWriteSize, DEFAULT_SHARED_READ_WRITE_SIZE, \ 4108 "Size of read-write space for metadata (in bytes)") \ 4109 range(MIN_SHARED_READ_WRITE_SIZE, MAX_SHARED_READ_WRITE_SIZE) \ 4110 \ 4111 product(size_t, SharedReadOnlySize, DEFAULT_SHARED_READ_ONLY_SIZE, \ 4112 "Size of read-only space for metadata (in bytes)") \ 4113 range(MIN_SHARED_READ_ONLY_SIZE, MAX_SHARED_READ_ONLY_SIZE) \ 4114 \ 4115 product(size_t, SharedMiscDataSize, DEFAULT_SHARED_MISC_DATA_SIZE, \ 4116 "Size of the shared miscellaneous data area (in bytes)") \ 4117 range(MIN_SHARED_MISC_DATA_SIZE, MAX_SHARED_MISC_DATA_SIZE) \ 4118 \ 4119 product(size_t, SharedMiscCodeSize, DEFAULT_SHARED_MISC_CODE_SIZE, \ 4120 "Size of the shared miscellaneous code area (in bytes)") \ 4121 range(MIN_SHARED_MISC_CODE_SIZE, MAX_SHARED_MISC_CODE_SIZE) \ 4122 \ 4123 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 4124 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 4125 "Address to allocate shared memory region for class data") \ 4126 range(0, SIZE_MAX) \ 4127 \ 4128 product(uintx, SharedSymbolTableBucketSize, 4, \ 4129 "Average number of symbols per bucket in shared table") \ 4130 range(2, 246) \ 4131 \ 4132 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 4133 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 4134 "classes. Just exclude them from the shared dictionary.") \ 4135 \ 4136 diagnostic(bool, PrintMethodHandleStubs, false, \ 4137 "Print generated stub code for method handles") \ 4138 \ 4139 develop(bool, TraceMethodHandles, false, \ 4140 "trace internal method handle operations") \ 4141 \ 4142 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4143 "perform extra checks when constructing method handles") \ 4144 \ 4145 diagnostic(bool, ShowHiddenFrames, false, \ 4146 "show method handle implementation frames (usually hidden)") \ 4147 \ 4148 experimental(bool, TrustFinalNonStaticFields, false, \ 4149 "trust final non-static declarations for constant folding") \ 4150 \ 4151 diagnostic(bool, FoldStableValues, true, \ 4152 "Optimize loads from stable fields (marked w/ @Stable)") \ 4153 \ 4154 develop(bool, TraceInvokeDynamic, false, \ 4155 "trace internal invoke dynamic operations") \ 4156 \ 4157 diagnostic(bool, PauseAtStartup, false, \ 4158 "Causes the VM to pause at startup time and wait for the pause " \ 4159 "file to be removed (default: ./vm.paused.<pid>)") \ 4160 \ 4161 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4162 "The file to create and for whose removal to await when pausing " \ 4163 "at startup. (default: ./vm.paused.<pid>)") \ 4164 \ 4165 diagnostic(bool, PauseAtExit, false, \ 4166 "Pause and wait for keypress on exit if a debugger is attached") \ 4167 \ 4168 product(bool, ExtendedDTraceProbes, false, \ 4169 "Enable performance-impacting dtrace probes") \ 4170 \ 4171 product(bool, DTraceMethodProbes, false, \ 4172 "Enable dtrace probes for method-entry and method-exit") \ 4173 \ 4174 product(bool, DTraceAllocProbes, false, \ 4175 "Enable dtrace probes for object allocation") \ 4176 \ 4177 product(bool, DTraceMonitorProbes, false, \ 4178 "Enable dtrace probes for monitor events") \ 4179 \ 4180 product(bool, RelaxAccessControlCheck, false, \ 4181 "Relax the access control checks in the verifier") \ 4182 \ 4183 product(uintx, StringTableSize, defaultStringTableSize, \ 4184 "Number of buckets in the interned String table") \ 4185 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4186 \ 4187 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4188 "Number of buckets in the JVM internal Symbol table") \ 4189 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4190 \ 4191 product(bool, UseStringDeduplication, false, \ 4192 "Use string deduplication") \ 4193 \ 4194 product(bool, PrintStringDeduplicationStatistics, false, \ 4195 "Print string deduplication statistics") \ 4196 \ 4197 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4198 "A string must reach this age (or be promoted to an old region) " \ 4199 "to be considered for deduplication") \ 4200 range(1, markOopDesc::max_age) \ 4201 \ 4202 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4203 "Force table resize every time the table is scanned") \ 4204 \ 4205 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4206 "Force table rehash every time the table is scanned") \ 4207 \ 4208 diagnostic(bool, WhiteBoxAPI, false, \ 4209 "Enable internal testing APIs") \ 4210 \ 4211 product(bool, PrintGCCause, true, \ 4212 "Include GC cause in GC logging") \ 4213 \ 4214 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4215 "Default survivor space alignment in bytes") \ 4216 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 4217 \ 4218 product(bool , AllowNonVirtualCalls, false, \ 4219 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4220 \ 4221 product(ccstr, DumpLoadedClassList, NULL, \ 4222 "Dump the names all loaded classes, that could be stored into " \ 4223 "the CDS archive, in the specified file") \ 4224 \ 4225 product(ccstr, SharedClassListFile, NULL, \ 4226 "Override the default CDS class list") \ 4227 \ 4228 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4229 "Override the default location of the CDS archive file") \ 4230 \ 4231 product(ccstr, ExtraSharedClassListFile, NULL, \ 4232 "Extra classlist for building the CDS archive file") \ 4233 \ 4234 experimental(size_t, ArrayAllocatorMallocLimit, \ 4235 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4236 "Allocation less than this value will be allocated " \ 4237 "using malloc. Larger allocations will use mmap.") \ 4238 \ 4239 experimental(bool, AlwaysAtomicAccesses, false, \ 4240 "Accesses to all variables should always be atomic") \ 4241 \ 4242 product(bool, EnableTracing, false, \ 4243 "Enable event-based tracing") \ 4244 \ 4245 product(bool, UseLockedTracing, false, \ 4246 "Use locked-tracing when doing event-based tracing") \ 4247 \ 4248 diagnostic(bool, UseUnalignedAccesses, false, \ 4249 "Use unaligned memory accesses in Unsafe") \ 4250 \ 4251 product_pd(bool, PreserveFramePointer, \ 4252 "Use the FP register for holding the frame pointer " \ 4253 "and not as a general purpose register.") \ 4254 \ 4255 diagnostic(bool, CheckIntrinsics, true, \ 4256 "When a class C is loaded, check that " \ 4257 "(1) all intrinsics defined by the VM for class C are present "\ 4258 "in the loaded class file and are marked with the " \ 4259 "@HotSpotIntrinsicCandidate annotation, that " \ 4260 "(2) there is an intrinsic registered for all loaded methods " \ 4261 "that are annotated with the @HotSpotIntrinsicCandidate " \ 4262 "annotation, and that " \ 4263 "(3) no orphan methods exist for class C (i.e., methods for " \ 4264 "which the VM declares an intrinsic but that are not declared "\ 4265 "in the loaded class C. " \ 4266 "Check (3) is available only in debug builds.") \ 4267 \ 4268 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 4269 "Disable backwards compatibility for compile commands.") \ 4270 \ 4271 diagnostic(bool, PrintCompilerDirectives, false, \ 4272 "Print compiler directives on installation.") 4273 4274/* 4275 * Macros for factoring of globals 4276 */ 4277 4278// Interface macros 4279#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4280#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4281#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4282#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4283#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4284#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4285#ifdef PRODUCT 4286#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 4287#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 4288#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 4289#else 4290#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4291#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4292#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4293#endif // PRODUCT 4294// Special LP64 flags, product only needed for now. 4295#ifdef _LP64 4296#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4297#else 4298#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4299#endif // _LP64 4300 4301// Implementation macros 4302#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4303#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4304#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4305#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4306#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4307#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4308#ifdef PRODUCT 4309#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 4310#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 4311#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 4312#else 4313#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4314#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4315#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4316#endif // PRODUCT 4317#ifdef _LP64 4318#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4319#else 4320#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4321#endif // _LP64 4322 4323// Only materialize src code for range checking when required, ignore otherwise 4324#define IGNORE_RANGE(a, b) 4325// Only materialize src code for contraint checking when required, ignore otherwise 4326#define IGNORE_CONSTRAINT(func,type) 4327 4328RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4329 DECLARE_PD_DEVELOPER_FLAG, \ 4330 DECLARE_PRODUCT_FLAG, \ 4331 DECLARE_PD_PRODUCT_FLAG, \ 4332 DECLARE_DIAGNOSTIC_FLAG, \ 4333 DECLARE_EXPERIMENTAL_FLAG, \ 4334 DECLARE_NOTPRODUCT_FLAG, \ 4335 DECLARE_MANAGEABLE_FLAG, \ 4336 DECLARE_PRODUCT_RW_FLAG, \ 4337 DECLARE_LP64_PRODUCT_FLAG, \ 4338 IGNORE_RANGE, \ 4339 IGNORE_CONSTRAINT) 4340 4341RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4342 DECLARE_PD_DEVELOPER_FLAG, \ 4343 DECLARE_PRODUCT_FLAG, \ 4344 DECLARE_PD_PRODUCT_FLAG, \ 4345 DECLARE_DIAGNOSTIC_FLAG, \ 4346 DECLARE_NOTPRODUCT_FLAG, \ 4347 IGNORE_RANGE, \ 4348 IGNORE_CONSTRAINT) 4349 4350ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4351 DECLARE_PRODUCT_FLAG, \ 4352 DECLARE_DIAGNOSTIC_FLAG, \ 4353 DECLARE_EXPERIMENTAL_FLAG, \ 4354 DECLARE_NOTPRODUCT_FLAG, \ 4355 IGNORE_RANGE, \ 4356 IGNORE_CONSTRAINT) 4357 4358// Extensions 4359 4360#include "runtime/globals_ext.hpp" 4361 4362#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4363