globals.hpp revision 11390:9789c3ca3a3d
1/* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26#define SHARE_VM_RUNTIME_GLOBALS_HPP 27 28#include "utilities/debug.hpp" 29#include <float.h> // for DBL_MAX 30 31// use this for flags that are true per default in the tiered build 32// but false in non-tiered builds, and vice versa 33#ifdef TIERED 34#define trueInTiered true 35#define falseInTiered false 36#else 37#define trueInTiered false 38#define falseInTiered true 39#endif 40 41#ifdef TARGET_ARCH_x86 42# include "globals_x86.hpp" 43#endif 44#ifdef TARGET_ARCH_sparc 45# include "globals_sparc.hpp" 46#endif 47#ifdef TARGET_ARCH_zero 48# include "globals_zero.hpp" 49#endif 50#ifdef TARGET_ARCH_arm 51# include "globals_arm.hpp" 52#endif 53#ifdef TARGET_ARCH_ppc 54# include "globals_ppc.hpp" 55#endif 56#ifdef TARGET_ARCH_aarch64 57# include "globals_aarch64.hpp" 58#endif 59#ifdef TARGET_OS_FAMILY_linux 60# include "globals_linux.hpp" 61#endif 62#ifdef TARGET_OS_FAMILY_solaris 63# include "globals_solaris.hpp" 64#endif 65#ifdef TARGET_OS_FAMILY_windows 66# include "globals_windows.hpp" 67#endif 68#ifdef TARGET_OS_FAMILY_aix 69# include "globals_aix.hpp" 70#endif 71#ifdef TARGET_OS_FAMILY_bsd 72# include "globals_bsd.hpp" 73#endif 74#ifdef TARGET_OS_ARCH_linux_x86 75# include "globals_linux_x86.hpp" 76#endif 77#ifdef TARGET_OS_ARCH_linux_sparc 78# include "globals_linux_sparc.hpp" 79#endif 80#ifdef TARGET_OS_ARCH_linux_zero 81# include "globals_linux_zero.hpp" 82#endif 83#ifdef TARGET_OS_ARCH_solaris_x86 84# include "globals_solaris_x86.hpp" 85#endif 86#ifdef TARGET_OS_ARCH_solaris_sparc 87# include "globals_solaris_sparc.hpp" 88#endif 89#ifdef TARGET_OS_ARCH_windows_x86 90# include "globals_windows_x86.hpp" 91#endif 92#ifdef TARGET_OS_ARCH_linux_arm 93# include "globals_linux_arm.hpp" 94#endif 95#ifdef TARGET_OS_ARCH_linux_ppc 96# include "globals_linux_ppc.hpp" 97#endif 98#ifdef TARGET_OS_ARCH_linux_aarch64 99# include "globals_linux_aarch64.hpp" 100#endif 101#ifdef TARGET_OS_ARCH_aix_ppc 102# include "globals_aix_ppc.hpp" 103#endif 104#ifdef TARGET_OS_ARCH_bsd_x86 105# include "globals_bsd_x86.hpp" 106#endif 107#ifdef TARGET_OS_ARCH_bsd_zero 108# include "globals_bsd_zero.hpp" 109#endif 110#ifdef COMPILER1 111#ifdef TARGET_ARCH_x86 112# include "c1_globals_x86.hpp" 113#endif 114#ifdef TARGET_ARCH_sparc 115# include "c1_globals_sparc.hpp" 116#endif 117#ifdef TARGET_ARCH_arm 118# include "c1_globals_arm.hpp" 119#endif 120#ifdef TARGET_ARCH_aarch64 121# include "c1_globals_aarch64.hpp" 122#endif 123#ifdef TARGET_OS_FAMILY_linux 124# include "c1_globals_linux.hpp" 125#endif 126#ifdef TARGET_OS_FAMILY_solaris 127# include "c1_globals_solaris.hpp" 128#endif 129#ifdef TARGET_OS_FAMILY_windows 130# include "c1_globals_windows.hpp" 131#endif 132#ifdef TARGET_OS_FAMILY_aix 133# include "c1_globals_aix.hpp" 134#endif 135#ifdef TARGET_OS_FAMILY_bsd 136# include "c1_globals_bsd.hpp" 137#endif 138#ifdef TARGET_ARCH_ppc 139# include "c1_globals_ppc.hpp" 140#endif 141#endif 142#ifdef COMPILER2 143#ifdef TARGET_ARCH_x86 144# include "c2_globals_x86.hpp" 145#endif 146#ifdef TARGET_ARCH_sparc 147# include "c2_globals_sparc.hpp" 148#endif 149#ifdef TARGET_ARCH_arm 150# include "c2_globals_arm.hpp" 151#endif 152#ifdef TARGET_ARCH_ppc 153# include "c2_globals_ppc.hpp" 154#endif 155#ifdef TARGET_ARCH_aarch64 156# include "c2_globals_aarch64.hpp" 157#endif 158#ifdef TARGET_OS_FAMILY_linux 159# include "c2_globals_linux.hpp" 160#endif 161#ifdef TARGET_OS_FAMILY_solaris 162# include "c2_globals_solaris.hpp" 163#endif 164#ifdef TARGET_OS_FAMILY_windows 165# include "c2_globals_windows.hpp" 166#endif 167#ifdef TARGET_OS_FAMILY_aix 168# include "c2_globals_aix.hpp" 169#endif 170#ifdef TARGET_OS_FAMILY_bsd 171# include "c2_globals_bsd.hpp" 172#endif 173#endif 174#ifdef SHARK 175#ifdef TARGET_ARCH_zero 176# include "shark_globals_zero.hpp" 177#endif 178#endif 179 180#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) && !INCLUDE_JVMCI 181define_pd_global(bool, BackgroundCompilation, false); 182define_pd_global(bool, UseTLAB, false); 183define_pd_global(bool, CICompileOSR, false); 184define_pd_global(bool, UseTypeProfile, false); 185define_pd_global(bool, UseOnStackReplacement, false); 186define_pd_global(bool, InlineIntrinsics, false); 187define_pd_global(bool, PreferInterpreterNativeStubs, true); 188define_pd_global(bool, ProfileInterpreter, false); 189define_pd_global(bool, ProfileTraps, false); 190define_pd_global(bool, TieredCompilation, false); 191 192define_pd_global(intx, CompileThreshold, 0); 193 194define_pd_global(intx, OnStackReplacePercentage, 0); 195define_pd_global(bool, ResizeTLAB, false); 196define_pd_global(intx, FreqInlineSize, 0); 197define_pd_global(size_t, NewSizeThreadIncrease, 4*K); 198define_pd_global(intx, InlineClassNatives, true); 199define_pd_global(intx, InlineUnsafeOps, true); 200define_pd_global(intx, InitialCodeCacheSize, 160*K); 201define_pd_global(intx, ReservedCodeCacheSize, 32*M); 202define_pd_global(intx, NonProfiledCodeHeapSize, 0); 203define_pd_global(intx, ProfiledCodeHeapSize, 0); 204define_pd_global(intx, NonNMethodCodeHeapSize, 32*M); 205 206define_pd_global(intx, CodeCacheExpansionSize, 32*K); 207define_pd_global(intx, CodeCacheMinBlockLength, 1); 208define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 209define_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 210define_pd_global(bool, NeverActAsServerClassMachine, true); 211define_pd_global(uint64_t,MaxRAM, 1ULL*G); 212#define CI_COMPILER_COUNT 0 213#else 214 215#if defined(COMPILER2) || INCLUDE_JVMCI 216#define CI_COMPILER_COUNT 2 217#else 218#define CI_COMPILER_COUNT 1 219#endif // COMPILER2 || INCLUDE_JVMCI 220 221#endif // no compilers 222 223// string type aliases used only in this file 224typedef const char* ccstr; 225typedef const char* ccstrlist; // represents string arguments which accumulate 226 227// function type that will construct default range string 228typedef const char* (*RangeStrFunc)(void); 229 230struct Flag { 231 enum Flags { 232 // value origin 233 DEFAULT = 0, 234 COMMAND_LINE = 1, 235 ENVIRON_VAR = 2, 236 CONFIG_FILE = 3, 237 MANAGEMENT = 4, 238 ERGONOMIC = 5, 239 ATTACH_ON_DEMAND = 6, 240 INTERNAL = 7, 241 242 LAST_VALUE_ORIGIN = INTERNAL, 243 VALUE_ORIGIN_BITS = 4, 244 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS), 245 246 // flag kind 247 KIND_PRODUCT = 1 << 4, 248 KIND_MANAGEABLE = 1 << 5, 249 KIND_DIAGNOSTIC = 1 << 6, 250 KIND_EXPERIMENTAL = 1 << 7, 251 KIND_NOT_PRODUCT = 1 << 8, 252 KIND_DEVELOP = 1 << 9, 253 KIND_PLATFORM_DEPENDENT = 1 << 10, 254 KIND_READ_WRITE = 1 << 11, 255 KIND_C1 = 1 << 12, 256 KIND_C2 = 1 << 13, 257 KIND_ARCH = 1 << 14, 258 KIND_SHARK = 1 << 15, 259 KIND_LP64_PRODUCT = 1 << 16, 260 KIND_COMMERCIAL = 1 << 17, 261 KIND_JVMCI = 1 << 18, 262 263 KIND_MASK = ~VALUE_ORIGIN_MASK 264 }; 265 266 enum Error { 267 // no error 268 SUCCESS = 0, 269 // flag name is missing 270 MISSING_NAME, 271 // flag value is missing 272 MISSING_VALUE, 273 // error parsing the textual form of the value 274 WRONG_FORMAT, 275 // flag is not writeable 276 NON_WRITABLE, 277 // flag value is outside of its bounds 278 OUT_OF_BOUNDS, 279 // flag value violates its constraint 280 VIOLATES_CONSTRAINT, 281 // there is no flag with the given name 282 INVALID_FLAG, 283 // the flag can only be set only on command line during invocation of the VM 284 COMMAND_LINE_ONLY, 285 // the flag may only be set once 286 SET_ONLY_ONCE, 287 // the flag is not writable in this combination of product/debug build 288 CONSTANT, 289 // other, unspecified error related to setting the flag 290 ERR_OTHER 291 }; 292 293 enum MsgType { 294 NONE = 0, 295 DIAGNOSTIC_FLAG_BUT_LOCKED, 296 EXPERIMENTAL_FLAG_BUT_LOCKED, 297 DEVELOPER_FLAG_BUT_PRODUCT_BUILD, 298 NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD 299 }; 300 301 const char* _type; 302 const char* _name; 303 void* _addr; 304 NOT_PRODUCT(const char* _doc;) 305 Flags _flags; 306 307 // points to all Flags static array 308 static Flag* flags; 309 310 // number of flags 311 static size_t numFlags; 312 313 static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); }; 314 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false); 315 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 316 317 static const char* get_int_default_range_str(); 318 static const char* get_uint_default_range_str(); 319 static const char* get_intx_default_range_str(); 320 static const char* get_uintx_default_range_str(); 321 static const char* get_uint64_t_default_range_str(); 322 static const char* get_size_t_default_range_str(); 323 static const char* get_double_default_range_str(); 324 325 Flag::Error check_writable(bool changed); 326 327 bool is_bool() const; 328 bool get_bool() const; 329 Flag::Error set_bool(bool value); 330 331 bool is_int() const; 332 int get_int() const; 333 Flag::Error set_int(int value); 334 335 bool is_uint() const; 336 uint get_uint() const; 337 Flag::Error set_uint(uint value); 338 339 bool is_intx() const; 340 intx get_intx() const; 341 Flag::Error set_intx(intx value); 342 343 bool is_uintx() const; 344 uintx get_uintx() const; 345 Flag::Error set_uintx(uintx value); 346 347 bool is_uint64_t() const; 348 uint64_t get_uint64_t() const; 349 Flag::Error set_uint64_t(uint64_t value); 350 351 bool is_size_t() const; 352 size_t get_size_t() const; 353 Flag::Error set_size_t(size_t value); 354 355 bool is_double() const; 356 double get_double() const; 357 Flag::Error set_double(double value); 358 359 bool is_ccstr() const; 360 bool ccstr_accumulates() const; 361 ccstr get_ccstr() const; 362 Flag::Error set_ccstr(ccstr value); 363 364 Flags get_origin(); 365 void set_origin(Flags origin); 366 367 bool is_default(); 368 bool is_ergonomic(); 369 bool is_command_line(); 370 371 bool is_product() const; 372 bool is_manageable() const; 373 bool is_diagnostic() const; 374 bool is_experimental() const; 375 bool is_notproduct() const; 376 bool is_develop() const; 377 bool is_read_write() const; 378 bool is_commercial() const; 379 380 bool is_constant_in_binary() const; 381 382 bool is_unlocker() const; 383 bool is_unlocked() const; 384 bool is_writeable() const; 385 bool is_external() const; 386 387 bool is_unlocker_ext() const; 388 bool is_unlocked_ext() const; 389 bool is_writeable_ext() const; 390 bool is_external_ext() const; 391 392 void unlock_diagnostic(); 393 394 Flag::MsgType get_locked_message(char*, int) const; 395 void get_locked_message_ext(char*, int) const; 396 397 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 398 void print_on(outputStream* st, bool withComments = false, bool printRanges = false); 399 void print_kind(outputStream* st); 400 void print_as_flag(outputStream* st); 401 402 static const char* flag_error_str(Flag::Error error); 403}; 404 405// debug flags control various aspects of the VM and are global accessible 406 407// use FlagSetting to temporarily change some debug flag 408// e.g. FlagSetting fs(DebugThisAndThat, true); 409// restored to previous value upon leaving scope 410class FlagSetting { 411 bool val; 412 bool* flag; 413 public: 414 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 415 ~FlagSetting() { *flag = val; } 416}; 417 418 419class CounterSetting { 420 intx* counter; 421 public: 422 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 423 ~CounterSetting() { (*counter)--; } 424}; 425 426class IntFlagSetting { 427 int val; 428 int* flag; 429 public: 430 IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; } 431 ~IntFlagSetting() { *flag = val; } 432}; 433 434class UIntFlagSetting { 435 uint val; 436 uint* flag; 437 public: 438 UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; } 439 ~UIntFlagSetting() { *flag = val; } 440}; 441 442class UIntXFlagSetting { 443 uintx val; 444 uintx* flag; 445 public: 446 UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 447 ~UIntXFlagSetting() { *flag = val; } 448}; 449 450class DoubleFlagSetting { 451 double val; 452 double* flag; 453 public: 454 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 455 ~DoubleFlagSetting() { *flag = val; } 456}; 457 458class SizeTFlagSetting { 459 size_t val; 460 size_t* flag; 461 public: 462 SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; } 463 ~SizeTFlagSetting() { *flag = val; } 464}; 465 466 467class CommandLineFlags { 468public: 469 static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false); 470 static Flag::Error boolAt(const char* name, bool* value, bool allow_locked = false, bool return_flag = false) { return boolAt(name, strlen(name), value, allow_locked, return_flag); } 471 static Flag::Error boolAtPut(Flag* flag, bool* value, Flag::Flags origin); 472 static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin); 473 static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 474 475 static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false); 476 static Flag::Error intAt(const char* name, int* value, bool allow_locked = false, bool return_flag = false) { return intAt(name, strlen(name), value, allow_locked, return_flag); } 477 static Flag::Error intAtPut(Flag* flag, int* value, Flag::Flags origin); 478 static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin); 479 static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); } 480 481 static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false); 482 static Flag::Error uintAt(const char* name, uint* value, bool allow_locked = false, bool return_flag = false) { return uintAt(name, strlen(name), value, allow_locked, return_flag); } 483 static Flag::Error uintAtPut(Flag* flag, uint* value, Flag::Flags origin); 484 static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin); 485 static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); } 486 487 static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false); 488 static Flag::Error intxAt(const char* name, intx* value, bool allow_locked = false, bool return_flag = false) { return intxAt(name, strlen(name), value, allow_locked, return_flag); } 489 static Flag::Error intxAtPut(Flag* flag, intx* value, Flag::Flags origin); 490 static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin); 491 static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 492 493 static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false); 494 static Flag::Error uintxAt(const char* name, uintx* value, bool allow_locked = false, bool return_flag = false) { return uintxAt(name, strlen(name), value, allow_locked, return_flag); } 495 static Flag::Error uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin); 496 static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin); 497 static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 498 499 static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false); 500 static Flag::Error size_tAt(const char* name, size_t* value, bool allow_locked = false, bool return_flag = false) { return size_tAt(name, strlen(name), value, allow_locked, return_flag); } 501 static Flag::Error size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin); 502 static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin); 503 static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); } 504 505 static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false); 506 static Flag::Error uint64_tAt(const char* name, uint64_t* value, bool allow_locked = false, bool return_flag = false) { return uint64_tAt(name, strlen(name), value, allow_locked, return_flag); } 507 static Flag::Error uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin); 508 static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin); 509 static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 510 511 static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false); 512 static Flag::Error doubleAt(const char* name, double* value, bool allow_locked = false, bool return_flag = false) { return doubleAt(name, strlen(name), value, allow_locked, return_flag); } 513 static Flag::Error doubleAtPut(Flag* flag, double* value, Flag::Flags origin); 514 static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin); 515 static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 516 517 static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false); 518 static Flag::Error ccstrAt(const char* name, ccstr* value, bool allow_locked = false, bool return_flag = false) { return ccstrAt(name, strlen(name), value, allow_locked, return_flag); } 519 // Contract: Flag will make private copy of the incoming value. 520 // Outgoing value is always malloc-ed, and caller MUST call free. 521 static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin); 522 static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 523 524 // Returns false if name is not a command line flag. 525 static bool wasSetOnCmdline(const char* name, bool* value); 526 static void printSetFlags(outputStream* out); 527 528 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 529 static void printFlags(outputStream* out, bool withComments, bool printRanges = false); 530 531 static void verify() PRODUCT_RETURN; 532}; 533 534// use this for flags that are true by default in the debug version but 535// false in the optimized version, and vice versa 536#ifdef ASSERT 537#define trueInDebug true 538#define falseInDebug false 539#else 540#define trueInDebug false 541#define falseInDebug true 542#endif 543 544// use this for flags that are true per default in the product build 545// but false in development builds, and vice versa 546#ifdef PRODUCT 547#define trueInProduct true 548#define falseInProduct false 549#else 550#define trueInProduct false 551#define falseInProduct true 552#endif 553 554#ifdef JAVASE_EMBEDDED 555#define falseInEmbedded false 556#else 557#define falseInEmbedded true 558#endif 559 560// develop flags are settable / visible only during development and are constant in the PRODUCT version 561// product flags are always settable / visible 562// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 563 564// A flag must be declared with one of the following types: 565// bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 566// The type "ccstr" is an alias for "const char*" and is used 567// only in this file, because the macrology requires single-token type names. 568 569// Note: Diagnostic options not meant for VM tuning or for product modes. 570// They are to be used for VM quality assurance or field diagnosis 571// of VM bugs. They are hidden so that users will not be encouraged to 572// try them as if they were VM ordinary execution options. However, they 573// are available in the product version of the VM. Under instruction 574// from support engineers, VM customers can turn them on to collect 575// diagnostic information about VM problems. To use a VM diagnostic 576// option, you must first specify +UnlockDiagnosticVMOptions. 577// (This master switch also affects the behavior of -Xprintflags.) 578// 579// experimental flags are in support of features that are not 580// part of the officially supported product, but are available 581// for experimenting with. They could, for example, be performance 582// features that may not have undergone full or rigorous QA, but which may 583// help performance in some cases and released for experimentation 584// by the community of users and developers. This flag also allows one to 585// be able to build a fully supported product that nonetheless also 586// ships with some unsupported, lightly tested, experimental features. 587// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 588// UnlockExperimentalVMOptions flag, which allows the control and 589// modification of the experimental flags. 590// 591// Nota bene: neither diagnostic nor experimental options should be used casually, 592// and they are not supported on production loads, except under explicit 593// direction from support engineers. 594// 595// manageable flags are writeable external product flags. 596// They are dynamically writeable through the JDK management interface 597// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 598// These flags are external exported interface (see CCC). The list of 599// manageable flags can be queried programmatically through the management 600// interface. 601// 602// A flag can be made as "manageable" only if 603// - the flag is defined in a CCC as an external exported interface. 604// - the VM implementation supports dynamic setting of the flag. 605// This implies that the VM must *always* query the flag variable 606// and not reuse state related to the flag state at any given time. 607// - you want the flag to be queried programmatically by the customers. 608// 609// product_rw flags are writeable internal product flags. 610// They are like "manageable" flags but for internal/private use. 611// The list of product_rw flags are internal/private flags which 612// may be changed/removed in a future release. It can be set 613// through the management interface to get/set value 614// when the name of flag is supplied. 615// 616// A flag can be made as "product_rw" only if 617// - the VM implementation supports dynamic setting of the flag. 618// This implies that the VM must *always* query the flag variable 619// and not reuse state related to the flag state at any given time. 620// 621// Note that when there is a need to support develop flags to be writeable, 622// it can be done in the same way as product_rw. 623// 624// range is a macro that will expand to min and max arguments for range 625// checking code if provided - see commandLineFlagRangeList.hpp 626// 627// constraint is a macro that will expand to custom function call 628// for constraint checking if provided - see commandLineFlagConstraintList.hpp 629// 630// writeable is a macro that controls if and how the value can change during the runtime 631// 632// writeable(Always) is optional and allows the flag to have its value changed 633// without any limitations at any time 634// 635// writeable(Once) flag value's can be only set once during the lifetime of VM 636// 637// writeable(CommandLineOnly) flag value's can be only set from command line 638// (multiple times allowed) 639// 640 641 642#define RUNTIME_FLAGS(develop, \ 643 develop_pd, \ 644 product, \ 645 product_pd, \ 646 diagnostic, \ 647 diagnostic_pd, \ 648 experimental, \ 649 notproduct, \ 650 manageable, \ 651 product_rw, \ 652 lp64_product, \ 653 range, \ 654 constraint, \ 655 writeable) \ 656 \ 657 lp64_product(bool, UseCompressedOops, false, \ 658 "Use 32-bit object references in 64-bit VM. " \ 659 "lp64_product means flag is always constant in 32 bit VM") \ 660 \ 661 lp64_product(bool, UseCompressedClassPointers, false, \ 662 "Use 32-bit class pointers in 64-bit VM. " \ 663 "lp64_product means flag is always constant in 32 bit VM") \ 664 \ 665 notproduct(bool, CheckCompressedOops, true, \ 666 "Generate checks in encoding/decoding code in debug VM") \ 667 \ 668 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 669 "Heap allocation steps through preferred address regions to find" \ 670 " where it can allocate the heap. Number of steps to take per " \ 671 "region.") \ 672 range(1, max_uintx) \ 673 \ 674 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 675 "Default object alignment in bytes, 8 is minimum") \ 676 range(8, 256) \ 677 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 678 \ 679 product(bool, AssumeMP, false, \ 680 "Instruct the VM to assume multiple processors are available") \ 681 \ 682 /* UseMembar is theoretically a temp flag used for memory barrier */ \ 683 /* removal testing. It was supposed to be removed before FCS but has */ \ 684 /* been re-added (see 6401008) */ \ 685 product_pd(bool, UseMembar, \ 686 "(Unstable) Issues membars on thread state transitions") \ 687 \ 688 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 689 "Clean the chunk pool asynchronously") \ 690 \ 691 experimental(bool, AlwaysSafeConstructors, false, \ 692 "Force safe construction, as if all fields are final.") \ 693 \ 694 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 695 "Enable normal processing of flags relating to field diagnostics")\ 696 \ 697 experimental(bool, UnlockExperimentalVMOptions, false, \ 698 "Enable normal processing of flags relating to experimental " \ 699 "features") \ 700 \ 701 product(bool, JavaMonitorsInStackTrace, true, \ 702 "Print information about Java monitor locks when the stacks are" \ 703 "dumped") \ 704 \ 705 product_pd(bool, UseLargePages, \ 706 "Use large page memory") \ 707 \ 708 product_pd(bool, UseLargePagesIndividualAllocation, \ 709 "Allocate large pages individually for better affinity") \ 710 \ 711 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 712 "Fail large pages individual allocation") \ 713 \ 714 product(bool, UseLargePagesInMetaspace, false, \ 715 "Use large page memory in metaspace. " \ 716 "Only used if UseLargePages is enabled.") \ 717 \ 718 product(bool, UseNUMA, false, \ 719 "Use NUMA if available") \ 720 \ 721 product(bool, UseNUMAInterleaving, false, \ 722 "Interleave memory across NUMA nodes if available") \ 723 \ 724 product(size_t, NUMAInterleaveGranularity, 2*M, \ 725 "Granularity to use for NUMA interleaving on Windows OS") \ 726 range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \ 727 \ 728 product(bool, ForceNUMA, false, \ 729 "Force NUMA optimizations on single-node/UMA systems") \ 730 \ 731 product(uintx, NUMAChunkResizeWeight, 20, \ 732 "Percentage (0-100) used to weight the current sample when " \ 733 "computing exponentially decaying average for " \ 734 "AdaptiveNUMAChunkSizing") \ 735 range(0, 100) \ 736 \ 737 product(size_t, NUMASpaceResizeRate, 1*G, \ 738 "Do not reallocate more than this amount per collection") \ 739 range(0, max_uintx) \ 740 \ 741 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 742 "Enable adaptive chunk sizing for NUMA") \ 743 \ 744 product(bool, NUMAStats, false, \ 745 "Print NUMA stats in detailed heap information") \ 746 \ 747 product(uintx, NUMAPageScanRate, 256, \ 748 "Maximum number of pages to include in the page scan procedure") \ 749 range(0, max_uintx) \ 750 \ 751 product_pd(bool, NeedsDeoptSuspend, \ 752 "True for register window machines (sparc/ia64)") \ 753 \ 754 product(intx, UseSSE, 99, \ 755 "Highest supported SSE instructions set on x86/x64") \ 756 range(0, 99) \ 757 \ 758 product(bool, UseAES, false, \ 759 "Control whether AES instructions can be used on x86/x64") \ 760 \ 761 product(bool, UseSHA, false, \ 762 "Control whether SHA instructions can be used " \ 763 "on SPARC, on ARM and on x86") \ 764 \ 765 diagnostic(bool, UseGHASHIntrinsics, false, \ 766 "Use intrinsics for GHASH versions of crypto") \ 767 \ 768 product(size_t, LargePageSizeInBytes, 0, \ 769 "Large page size (0 to let VM choose the page size)") \ 770 range(0, max_uintx) \ 771 \ 772 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 773 "Use large pages if maximum heap is at least this big") \ 774 range(0, max_uintx) \ 775 \ 776 product(bool, ForceTimeHighResolution, false, \ 777 "Using high time resolution (for Win32 only)") \ 778 \ 779 develop(bool, TracePcPatching, false, \ 780 "Trace usage of frame::patch_pc") \ 781 \ 782 develop(bool, TraceJumps, false, \ 783 "Trace assembly jumps in thread ring buffer") \ 784 \ 785 develop(bool, TraceRelocator, false, \ 786 "Trace the bytecode relocator") \ 787 \ 788 develop(bool, TraceLongCompiles, false, \ 789 "Print out every time compilation is longer than " \ 790 "a given threshold") \ 791 \ 792 develop(bool, SafepointALot, false, \ 793 "Generate a lot of safepoints. This works with " \ 794 "GuaranteedSafepointInterval") \ 795 \ 796 product_pd(bool, BackgroundCompilation, \ 797 "A thread requesting compilation is not blocked during " \ 798 "compilation") \ 799 \ 800 product(bool, PrintVMQWaitTime, false, \ 801 "Print out the waiting time in VM operation queue") \ 802 \ 803 develop(bool, TraceOopMapGeneration, false, \ 804 "Show OopMapGeneration") \ 805 \ 806 product(bool, MethodFlushing, true, \ 807 "Reclamation of zombie and not-entrant methods") \ 808 \ 809 develop(bool, VerifyStack, false, \ 810 "Verify stack of each thread when it is entering a runtime call") \ 811 \ 812 diagnostic(bool, ForceUnreachable, false, \ 813 "Make all non code cache addresses to be unreachable by " \ 814 "forcing use of 64bit literal fixups") \ 815 \ 816 notproduct(bool, StressDerivedPointers, false, \ 817 "Force scavenge when a derived pointer is detected on stack " \ 818 "after rtm call") \ 819 \ 820 develop(bool, TraceDerivedPointers, false, \ 821 "Trace traversal of derived pointers on stack") \ 822 \ 823 notproduct(bool, TraceCodeBlobStacks, false, \ 824 "Trace stack-walk of codeblobs") \ 825 \ 826 product(bool, PrintJNIResolving, false, \ 827 "Used to implement -v:jni") \ 828 \ 829 notproduct(bool, PrintRewrites, false, \ 830 "Print methods that are being rewritten") \ 831 \ 832 product(bool, UseInlineCaches, true, \ 833 "Use Inline Caches for virtual calls ") \ 834 \ 835 diagnostic(bool, InlineArrayCopy, true, \ 836 "Inline arraycopy native that is known to be part of " \ 837 "base library DLL") \ 838 \ 839 diagnostic(bool, InlineObjectHash, true, \ 840 "Inline Object::hashCode() native that is known to be part " \ 841 "of base library DLL") \ 842 \ 843 diagnostic(bool, InlineNatives, true, \ 844 "Inline natives that are known to be part of base library DLL") \ 845 \ 846 diagnostic(bool, InlineMathNatives, true, \ 847 "Inline SinD, CosD, etc.") \ 848 \ 849 diagnostic(bool, InlineClassNatives, true, \ 850 "Inline Class.isInstance, etc") \ 851 \ 852 diagnostic(bool, InlineThreadNatives, true, \ 853 "Inline Thread.currentThread, etc") \ 854 \ 855 diagnostic(bool, InlineUnsafeOps, true, \ 856 "Inline memory ops (native methods) from Unsafe") \ 857 \ 858 product(bool, CriticalJNINatives, true, \ 859 "Check for critical JNI entry points") \ 860 \ 861 notproduct(bool, StressCriticalJNINatives, false, \ 862 "Exercise register saving code in critical natives") \ 863 \ 864 diagnostic(bool, UseAESIntrinsics, false, \ 865 "Use intrinsics for AES versions of crypto") \ 866 \ 867 diagnostic(bool, UseAESCTRIntrinsics, false, \ 868 "Use intrinsics for the paralleled version of AES/CTR crypto") \ 869 \ 870 diagnostic(bool, UseSHA1Intrinsics, false, \ 871 "Use intrinsics for SHA-1 crypto hash function. " \ 872 "Requires that UseSHA is enabled.") \ 873 \ 874 diagnostic(bool, UseSHA256Intrinsics, false, \ 875 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 876 "Requires that UseSHA is enabled.") \ 877 \ 878 diagnostic(bool, UseSHA512Intrinsics, false, \ 879 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 880 "Requires that UseSHA is enabled.") \ 881 \ 882 diagnostic(bool, UseCRC32Intrinsics, false, \ 883 "use intrinsics for java.util.zip.CRC32") \ 884 \ 885 diagnostic(bool, UseCRC32CIntrinsics, false, \ 886 "use intrinsics for java.util.zip.CRC32C") \ 887 \ 888 diagnostic(bool, UseAdler32Intrinsics, false, \ 889 "use intrinsics for java.util.zip.Adler32") \ 890 \ 891 diagnostic(bool, UseVectorizedMismatchIntrinsic, false, \ 892 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ 893 \ 894 diagnostic(ccstrlist, DisableIntrinsic, "", \ 895 "do not expand intrinsics whose (internal) names appear here") \ 896 \ 897 develop(bool, TraceCallFixup, false, \ 898 "Trace all call fixups") \ 899 \ 900 develop(bool, DeoptimizeALot, false, \ 901 "Deoptimize at every exit from the runtime system") \ 902 \ 903 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 904 "A comma separated list of bcis to deoptimize at") \ 905 \ 906 product(bool, DeoptimizeRandom, false, \ 907 "Deoptimize random frames on random exit from the runtime system")\ 908 \ 909 notproduct(bool, ZombieALot, false, \ 910 "Create zombies (non-entrant) at exit from the runtime system") \ 911 \ 912 product(bool, UnlinkSymbolsALot, false, \ 913 "Unlink unreferenced symbols from the symbol table at safepoints")\ 914 \ 915 notproduct(bool, WalkStackALot, false, \ 916 "Trace stack (no print) at every exit from the runtime system") \ 917 \ 918 product(bool, Debugging, false, \ 919 "Set when executing debug methods in debug.cpp " \ 920 "(to prevent triggering assertions)") \ 921 \ 922 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 923 "Enable strict checks that safepoints cannot happen for threads " \ 924 "that use NoSafepointVerifier") \ 925 \ 926 notproduct(bool, VerifyLastFrame, false, \ 927 "Verify oops on last frame on entry to VM") \ 928 \ 929 product(bool, FailOverToOldVerifier, true, \ 930 "Fail over to old verifier when split verifier fails") \ 931 \ 932 develop(bool, ShowSafepointMsgs, false, \ 933 "Show message about safepoint synchronization") \ 934 \ 935 product(bool, SafepointTimeout, false, \ 936 "Time out and warn or fail after SafepointTimeoutDelay " \ 937 "milliseconds if failed to reach safepoint") \ 938 \ 939 develop(bool, DieOnSafepointTimeout, false, \ 940 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 941 \ 942 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 943 /* typically, at most a few retries are needed */ \ 944 product(intx, SuspendRetryCount, 50, \ 945 "Maximum retry count for an external suspend request") \ 946 range(0, max_intx) \ 947 \ 948 product(intx, SuspendRetryDelay, 5, \ 949 "Milliseconds to delay per retry (* current_retry_count)") \ 950 range(0, max_intx) \ 951 \ 952 product(bool, AssertOnSuspendWaitFailure, false, \ 953 "Assert/Guarantee on external suspend wait failure") \ 954 \ 955 product(bool, TraceSuspendWaitFailures, false, \ 956 "Trace external suspend wait failures") \ 957 \ 958 product(bool, MaxFDLimit, true, \ 959 "Bump the number of file descriptors to maximum in Solaris") \ 960 \ 961 diagnostic(bool, LogEvents, true, \ 962 "Enable the various ring buffer event logs") \ 963 \ 964 diagnostic(uintx, LogEventsBufferEntries, 10, \ 965 "Number of ring buffer event logs") \ 966 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 967 \ 968 product(bool, BytecodeVerificationRemote, true, \ 969 "Enable the Java bytecode verifier for remote classes") \ 970 \ 971 product(bool, BytecodeVerificationLocal, false, \ 972 "Enable the Java bytecode verifier for local classes") \ 973 \ 974 develop(bool, ForceFloatExceptions, trueInDebug, \ 975 "Force exceptions on FP stack under/overflow") \ 976 \ 977 develop(bool, VerifyStackAtCalls, false, \ 978 "Verify that the stack pointer is unchanged after calls") \ 979 \ 980 develop(bool, TraceJavaAssertions, false, \ 981 "Trace java language assertions") \ 982 \ 983 notproduct(bool, CheckAssertionStatusDirectives, false, \ 984 "Temporary - see javaClasses.cpp") \ 985 \ 986 notproduct(bool, PrintMallocFree, false, \ 987 "Trace calls to C heap malloc/free allocation") \ 988 \ 989 notproduct(bool, VerifyCodeCache, false, \ 990 "Verify code cache on memory allocation/deallocation") \ 991 \ 992 develop(bool, UseMallocOnly, false, \ 993 "Use only malloc/free for allocation (no resource area/arena)") \ 994 \ 995 develop(bool, PrintMalloc, false, \ 996 "Print all malloc/free calls") \ 997 \ 998 develop(bool, PrintMallocStatistics, false, \ 999 "Print malloc/free statistics") \ 1000 \ 1001 develop(bool, ZapResourceArea, trueInDebug, \ 1002 "Zap freed resource/arena space with 0xABABABAB") \ 1003 \ 1004 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 1005 "Zap freed VM handle space with 0xBCBCBCBC") \ 1006 \ 1007 develop(bool, ZapJNIHandleArea, trueInDebug, \ 1008 "Zap freed JNI handle space with 0xFEFEFEFE") \ 1009 \ 1010 notproduct(bool, ZapStackSegments, trueInDebug, \ 1011 "Zap allocated/freed stack segments with 0xFADFADED") \ 1012 \ 1013 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 1014 "Zap unused heap space with 0xBAADBABE") \ 1015 \ 1016 develop(bool, CheckZapUnusedHeapArea, false, \ 1017 "Check zapping of unused heap space") \ 1018 \ 1019 develop(bool, ZapFillerObjects, trueInDebug, \ 1020 "Zap filler objects with 0xDEAFBABE") \ 1021 \ 1022 develop(bool, PrintVMMessages, true, \ 1023 "Print VM messages on console") \ 1024 \ 1025 notproduct(uintx, ErrorHandlerTest, 0, \ 1026 "If > 0, provokes an error after VM initialization; the value " \ 1027 "determines which error to provoke. See test_error_handler() " \ 1028 "in debug.cpp.") \ 1029 \ 1030 notproduct(uintx, TestCrashInErrorHandler, 0, \ 1031 "If > 0, provokes an error inside VM error handler (a secondary " \ 1032 "crash). see test_error_handler() in debug.cpp.") \ 1033 \ 1034 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 1035 "If true, tests SafeFetch inside error handler.") \ 1036 \ 1037 develop(bool, Verbose, false, \ 1038 "Print additional debugging information from other modes") \ 1039 \ 1040 develop(bool, PrintMiscellaneous, false, \ 1041 "Print uncategorized debugging information (requires +Verbose)") \ 1042 \ 1043 develop(bool, WizardMode, false, \ 1044 "Print much more debugging information") \ 1045 \ 1046 product(bool, ShowMessageBoxOnError, false, \ 1047 "Keep process alive on VM fatal error") \ 1048 \ 1049 product(bool, CreateCoredumpOnCrash, true, \ 1050 "Create core/mini dump on VM fatal error") \ 1051 \ 1052 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 1053 "Timeout, in seconds, to limit the time spent on writing an " \ 1054 "error log in case of a crash.") \ 1055 range(0, (uint64_t)max_jlong/1000) \ 1056 \ 1057 product_pd(bool, UseOSErrorReporting, \ 1058 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 1059 \ 1060 product(bool, SuppressFatalErrorMessage, false, \ 1061 "Report NO fatal error message (avoid deadlock)") \ 1062 \ 1063 product(ccstrlist, OnError, "", \ 1064 "Run user-defined commands on fatal error; see VMError.cpp " \ 1065 "for examples") \ 1066 \ 1067 product(ccstrlist, OnOutOfMemoryError, "", \ 1068 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 1069 \ 1070 manageable(bool, HeapDumpBeforeFullGC, false, \ 1071 "Dump heap to file before any major stop-the-world GC") \ 1072 \ 1073 manageable(bool, HeapDumpAfterFullGC, false, \ 1074 "Dump heap to file after any major stop-the-world GC") \ 1075 \ 1076 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 1077 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 1078 \ 1079 manageable(ccstr, HeapDumpPath, NULL, \ 1080 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 1081 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 1082 "in the working directory)") \ 1083 \ 1084 develop(bool, BreakAtWarning, false, \ 1085 "Execute breakpoint upon encountering VM warning") \ 1086 \ 1087 develop(bool, UseFakeTimers, false, \ 1088 "Tell whether the VM should use system time or a fake timer") \ 1089 \ 1090 product(ccstr, NativeMemoryTracking, "off", \ 1091 "Native memory tracking options") \ 1092 \ 1093 diagnostic(bool, PrintNMTStatistics, false, \ 1094 "Print native memory tracking summary data if it is on") \ 1095 \ 1096 diagnostic(bool, LogCompilation, false, \ 1097 "Log compilation activity in detail to LogFile") \ 1098 \ 1099 product(bool, PrintCompilation, false, \ 1100 "Print compilations") \ 1101 \ 1102 diagnostic(bool, TraceNMethodInstalls, false, \ 1103 "Trace nmethod installation") \ 1104 \ 1105 diagnostic(intx, ScavengeRootsInCode, 2, \ 1106 "0: do not allow scavengable oops in the code cache; " \ 1107 "1: allow scavenging from the code cache; " \ 1108 "2: emit as many constants as the compiler can see") \ 1109 range(0, 2) \ 1110 \ 1111 product(bool, AlwaysRestoreFPU, false, \ 1112 "Restore the FPU control word after every JNI call (expensive)") \ 1113 \ 1114 diagnostic(bool, PrintCompilation2, false, \ 1115 "Print additional statistics per compilation") \ 1116 \ 1117 diagnostic(bool, PrintAdapterHandlers, false, \ 1118 "Print code generated for i2c/c2i adapters") \ 1119 \ 1120 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 1121 "Verify that i2c/c2i adapters are called properly") \ 1122 \ 1123 develop(bool, VerifyAdapterSharing, false, \ 1124 "Verify that the code for shared adapters is the equivalent") \ 1125 \ 1126 diagnostic(bool, PrintAssembly, false, \ 1127 "Print assembly code (using external disassembler.so)") \ 1128 \ 1129 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 1130 "Print options string passed to disassembler.so") \ 1131 \ 1132 notproduct(bool, PrintNMethodStatistics, false, \ 1133 "Print a summary statistic for the generated nmethods") \ 1134 \ 1135 diagnostic(bool, PrintNMethods, false, \ 1136 "Print assembly code for nmethods when generated") \ 1137 \ 1138 diagnostic(bool, PrintNativeNMethods, false, \ 1139 "Print assembly code for native nmethods when generated") \ 1140 \ 1141 develop(bool, PrintDebugInfo, false, \ 1142 "Print debug information for all nmethods when generated") \ 1143 \ 1144 develop(bool, PrintRelocations, false, \ 1145 "Print relocation information for all nmethods when generated") \ 1146 \ 1147 develop(bool, PrintDependencies, false, \ 1148 "Print dependency information for all nmethods when generated") \ 1149 \ 1150 develop(bool, PrintExceptionHandlers, false, \ 1151 "Print exception handler tables for all nmethods when generated") \ 1152 \ 1153 develop(bool, StressCompiledExceptionHandlers, false, \ 1154 "Exercise compiled exception handlers") \ 1155 \ 1156 develop(bool, InterceptOSException, false, \ 1157 "Start debugger when an implicit OS (e.g. NULL) " \ 1158 "exception happens") \ 1159 \ 1160 product(bool, PrintCodeCache, false, \ 1161 "Print the code cache memory usage when exiting") \ 1162 \ 1163 develop(bool, PrintCodeCache2, false, \ 1164 "Print detailed usage information on the code cache when exiting")\ 1165 \ 1166 product(bool, PrintCodeCacheOnCompilation, false, \ 1167 "Print the code cache memory usage each time a method is " \ 1168 "compiled") \ 1169 \ 1170 diagnostic(bool, PrintStubCode, false, \ 1171 "Print generated stub code") \ 1172 \ 1173 product(bool, StackTraceInThrowable, true, \ 1174 "Collect backtrace in throwable when exception happens") \ 1175 \ 1176 product(bool, OmitStackTraceInFastThrow, true, \ 1177 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1178 \ 1179 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1180 "Print bytecode statistics when dumping profiler output") \ 1181 \ 1182 product(bool, ProfilerRecordPC, false, \ 1183 "Collect ticks for each 16 byte interval of compiled code") \ 1184 \ 1185 product(bool, ProfileVM, false, \ 1186 "Profile ticks that fall within VM (either in the VM Thread " \ 1187 "or VM code called through stubs)") \ 1188 \ 1189 product(bool, ProfileIntervals, false, \ 1190 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1191 \ 1192 notproduct(bool, ProfilerCheckIntervals, false, \ 1193 "Collect and print information on spacing of profiler ticks") \ 1194 \ 1195 product(bool, PrintWarnings, true, \ 1196 "Print JVM warnings to output stream") \ 1197 \ 1198 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1199 "Print warnings for stalled SpinLocks") \ 1200 \ 1201 product(bool, RegisterFinalizersAtInit, true, \ 1202 "Register finalizable objects at end of Object.<init> or " \ 1203 "after allocation") \ 1204 \ 1205 develop(bool, RegisterReferences, true, \ 1206 "Tell whether the VM should register soft/weak/final/phantom " \ 1207 "references") \ 1208 \ 1209 develop(bool, IgnoreRewrites, false, \ 1210 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1211 "This is unsafe!") \ 1212 \ 1213 develop(bool, PrintCodeCacheExtension, false, \ 1214 "Print extension of code cache") \ 1215 \ 1216 develop(bool, UsePrivilegedStack, true, \ 1217 "Enable the security JVM functions") \ 1218 \ 1219 develop(bool, ProtectionDomainVerification, true, \ 1220 "Verify protection domain before resolution in system dictionary")\ 1221 \ 1222 product(bool, ClassUnloading, true, \ 1223 "Do unloading of classes") \ 1224 \ 1225 product(bool, ClassUnloadingWithConcurrentMark, true, \ 1226 "Do unloading of classes with a concurrent marking cycle") \ 1227 \ 1228 develop(bool, DisableStartThread, false, \ 1229 "Disable starting of additional Java threads " \ 1230 "(for debugging only)") \ 1231 \ 1232 develop(bool, MemProfiling, false, \ 1233 "Write memory usage profiling to log file") \ 1234 \ 1235 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1236 "Print the system dictionary at exit") \ 1237 \ 1238 experimental(intx, PredictedLoadedClassCount, 0, \ 1239 "Experimental: Tune loaded class cache starting size") \ 1240 \ 1241 diagnostic(bool, UnsyncloadClass, false, \ 1242 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1243 "class loader must call VM synchronized for findClass " \ 1244 "and defineClass.") \ 1245 \ 1246 product(bool, AlwaysLockClassLoader, false, \ 1247 "Require the VM to acquire the class loader lock before calling " \ 1248 "loadClass() even for class loaders registering " \ 1249 "as parallel capable") \ 1250 \ 1251 product(bool, AllowParallelDefineClass, false, \ 1252 "Allow parallel defineClass requests for class loaders " \ 1253 "registering as parallel capable") \ 1254 \ 1255 product(bool, MustCallLoadClassInternal, false, \ 1256 "Call loadClassInternal() rather than loadClass()") \ 1257 \ 1258 product_pd(bool, DontYieldALot, \ 1259 "Throw away obvious excess yield calls") \ 1260 \ 1261 product(bool, ConvertSleepToYield, true, \ 1262 "Convert sleep(0) to thread yield ") \ 1263 \ 1264 product(bool, ConvertYieldToSleep, false, \ 1265 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1266 "behavior") \ 1267 \ 1268 develop(bool, UseDetachedThreads, true, \ 1269 "Use detached threads that are recycled upon termination " \ 1270 "(for Solaris only)") \ 1271 \ 1272 product(bool, UseLWPSynchronization, true, \ 1273 "Use LWP-based instead of libthread-based synchronization " \ 1274 "(SPARC only)") \ 1275 \ 1276 experimental(ccstr, SyncKnobs, NULL, \ 1277 "(Unstable) Various monitor synchronization tunables") \ 1278 \ 1279 experimental(intx, EmitSync, 0, \ 1280 "(Unsafe, Unstable) " \ 1281 "Control emission of inline sync fast-path code") \ 1282 \ 1283 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1284 range(0, max_jint) \ 1285 \ 1286 product(bool, MonitorInUseLists, true, "Track Monitors for Deflation") \ 1287 \ 1288 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1289 "Experimental Sync flags") \ 1290 \ 1291 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1292 \ 1293 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \ 1294 \ 1295 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1296 \ 1297 experimental(intx, hashCode, 5, \ 1298 "(Unstable) select hashCode generation algorithm") \ 1299 \ 1300 product(bool, FilterSpuriousWakeups, true, \ 1301 "When true prevents OS-level spurious, or premature, wakeups " \ 1302 "from Object.wait (Ignored for Windows)") \ 1303 \ 1304 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1305 \ 1306 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1307 \ 1308 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1309 \ 1310 develop(bool, UsePthreads, false, \ 1311 "Use pthread-based instead of libthread-based synchronization " \ 1312 "(SPARC only)") \ 1313 \ 1314 product(bool, ReduceSignalUsage, false, \ 1315 "Reduce the use of OS signals in Java and/or the VM") \ 1316 \ 1317 develop_pd(bool, ShareVtableStubs, \ 1318 "Share vtable stubs (smaller code but worse branch prediction") \ 1319 \ 1320 develop(bool, LoadLineNumberTables, true, \ 1321 "Tell whether the class file parser loads line number tables") \ 1322 \ 1323 develop(bool, LoadLocalVariableTables, true, \ 1324 "Tell whether the class file parser loads local variable tables") \ 1325 \ 1326 develop(bool, LoadLocalVariableTypeTables, true, \ 1327 "Tell whether the class file parser loads local variable type" \ 1328 "tables") \ 1329 \ 1330 product(bool, AllowUserSignalHandlers, false, \ 1331 "Do not complain if the application installs signal handlers " \ 1332 "(Solaris & Linux only)") \ 1333 \ 1334 product(bool, UseSignalChaining, true, \ 1335 "Use signal-chaining to invoke signal handlers installed " \ 1336 "by the application (Solaris & Linux only)") \ 1337 \ 1338 product(bool, AllowJNIEnvProxy, false, \ 1339 "Allow JNIEnv proxies for jdbx") \ 1340 \ 1341 product(bool, RestoreMXCSROnJNICalls, false, \ 1342 "Restore MXCSR when returning from JNI calls") \ 1343 \ 1344 product(bool, CheckJNICalls, false, \ 1345 "Verify all arguments to JNI calls") \ 1346 \ 1347 product(bool, CheckEndorsedAndExtDirs, false, \ 1348 "Verify the endorsed and extension directories are not used") \ 1349 \ 1350 product(bool, UseFastJNIAccessors, true, \ 1351 "Use optimized versions of Get<Primitive>Field") \ 1352 \ 1353 product(intx, MaxJNILocalCapacity, 65536, \ 1354 "Maximum allowable local JNI handle capacity to " \ 1355 "EnsureLocalCapacity() and PushLocalFrame(), " \ 1356 "where <= 0 is unlimited, default: 65536") \ 1357 range(min_intx, max_intx) \ 1358 \ 1359 product(bool, EagerXrunInit, false, \ 1360 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1361 "but not all -Xrun libraries may support the state of the VM " \ 1362 "at this time") \ 1363 \ 1364 product(bool, PreserveAllAnnotations, false, \ 1365 "Preserve RuntimeInvisibleAnnotations as well " \ 1366 "as RuntimeVisibleAnnotations") \ 1367 \ 1368 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1369 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1370 \ 1371 product(bool, UseXMMForArrayCopy, false, \ 1372 "Use SSE2 MOVQ instruction for Arraycopy") \ 1373 \ 1374 product(intx, FieldsAllocationStyle, 1, \ 1375 "0 - type based with oops first, " \ 1376 "1 - with oops last, " \ 1377 "2 - oops in super and sub classes are together") \ 1378 range(0, 2) \ 1379 \ 1380 product(bool, CompactFields, true, \ 1381 "Allocate nonstatic fields in gaps between previous fields") \ 1382 \ 1383 notproduct(bool, PrintFieldLayout, false, \ 1384 "Print field layout for each class") \ 1385 \ 1386 /* Need to limit the extent of the padding to reasonable size. */\ 1387 /* 8K is well beyond the reasonable HW cache line size, even with */\ 1388 /* aggressive prefetching, while still leaving the room for segregating */\ 1389 /* among the distinct pages. */\ 1390 product(intx, ContendedPaddingWidth, 128, \ 1391 "How many bytes to pad the fields/classes marked @Contended with")\ 1392 range(0, 8192) \ 1393 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 1394 \ 1395 product(bool, EnableContended, true, \ 1396 "Enable @Contended annotation support") \ 1397 \ 1398 product(bool, RestrictContended, true, \ 1399 "Restrict @Contended to trusted classes") \ 1400 \ 1401 product(bool, UseBiasedLocking, true, \ 1402 "Enable biased locking in JVM") \ 1403 \ 1404 product(intx, BiasedLockingStartupDelay, 4000, \ 1405 "Number of milliseconds to wait before enabling biased locking") \ 1406 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 1407 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 1408 \ 1409 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1410 "Print statistics of biased locking in JVM") \ 1411 \ 1412 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1413 "Threshold of number of revocations per type to try to " \ 1414 "rebias all objects in the heap of that type") \ 1415 range(0, max_intx) \ 1416 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 1417 \ 1418 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1419 "Threshold of number of revocations per type to permanently " \ 1420 "revoke biases of all objects in the heap of that type") \ 1421 range(0, max_intx) \ 1422 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 1423 \ 1424 product(intx, BiasedLockingDecayTime, 25000, \ 1425 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1426 "type after previous bulk rebias") \ 1427 range(500, max_intx) \ 1428 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 1429 \ 1430 product(bool, ExitOnOutOfMemoryError, false, \ 1431 "JVM exits on the first occurrence of an out-of-memory error") \ 1432 \ 1433 product(bool, CrashOnOutOfMemoryError, false, \ 1434 "JVM aborts, producing an error log and core/mini dump, on the " \ 1435 "first occurrence of an out-of-memory error") \ 1436 \ 1437 /* tracing */ \ 1438 \ 1439 develop(bool, StressRewriter, false, \ 1440 "Stress linktime bytecode rewriting") \ 1441 \ 1442 product(ccstr, TraceJVMTI, NULL, \ 1443 "Trace flags for JVMTI functions and events") \ 1444 \ 1445 /* This option can change an EMCP method into an obsolete method. */ \ 1446 /* This can affect tests that except specific methods to be EMCP. */ \ 1447 /* This option should be used with caution. */ \ 1448 product(bool, StressLdcRewrite, false, \ 1449 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1450 \ 1451 /* change to false by default sometime after Mustang */ \ 1452 product(bool, VerifyMergedCPBytecodes, true, \ 1453 "Verify bytecodes after RedefineClasses constant pool merging") \ 1454 \ 1455 develop(bool, TraceBytecodes, false, \ 1456 "Trace bytecode execution") \ 1457 \ 1458 develop(bool, TraceICs, false, \ 1459 "Trace inline cache changes") \ 1460 \ 1461 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1462 "Trace method invocation counter overflow") \ 1463 \ 1464 develop(bool, TraceInlineCacheClearing, false, \ 1465 "Trace clearing of inline caches in nmethods") \ 1466 \ 1467 develop(bool, TraceDependencies, false, \ 1468 "Trace dependencies") \ 1469 \ 1470 develop(bool, VerifyDependencies, trueInDebug, \ 1471 "Exercise and verify the compilation dependency mechanism") \ 1472 \ 1473 develop(bool, TraceNewOopMapGeneration, false, \ 1474 "Trace OopMapGeneration") \ 1475 \ 1476 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1477 "Trace OopMapGeneration: print detailed cell states") \ 1478 \ 1479 develop(bool, TimeOopMap, false, \ 1480 "Time calls to GenerateOopMap::compute_map() in sum") \ 1481 \ 1482 develop(bool, TimeOopMap2, false, \ 1483 "Time calls to GenerateOopMap::compute_map() individually") \ 1484 \ 1485 develop(bool, TraceOopMapRewrites, false, \ 1486 "Trace rewriting of method oops during oop map generation") \ 1487 \ 1488 develop(bool, TraceICBuffer, false, \ 1489 "Trace usage of IC buffer") \ 1490 \ 1491 develop(bool, TraceCompiledIC, false, \ 1492 "Trace changes of compiled IC") \ 1493 \ 1494 /* gc */ \ 1495 \ 1496 product(bool, UseSerialGC, false, \ 1497 "Use the Serial garbage collector") \ 1498 \ 1499 product(bool, UseG1GC, false, \ 1500 "Use the Garbage-First garbage collector") \ 1501 \ 1502 product(bool, UseParallelGC, false, \ 1503 "Use the Parallel Scavenge garbage collector") \ 1504 \ 1505 product(bool, UseParallelOldGC, false, \ 1506 "Use the Parallel Old garbage collector") \ 1507 \ 1508 product(uintx, HeapMaximumCompactionInterval, 20, \ 1509 "How often should we maximally compact the heap (not allowing " \ 1510 "any dead space)") \ 1511 range(0, max_uintx) \ 1512 \ 1513 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1514 "The collection count for the first maximum compaction") \ 1515 range(0, max_uintx) \ 1516 \ 1517 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1518 "Use maximum compaction in the Parallel Old garbage collector " \ 1519 "for a system GC") \ 1520 \ 1521 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1522 "The mean used by the parallel compact dead wood " \ 1523 "limiter (a number between 0-100)") \ 1524 range(0, 100) \ 1525 \ 1526 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1527 "The standard deviation used by the parallel compact dead wood " \ 1528 "limiter (a number between 0-100)") \ 1529 range(0, 100) \ 1530 \ 1531 product(uint, ParallelGCThreads, 0, \ 1532 "Number of parallel threads parallel gc will use") \ 1533 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \ 1534 \ 1535 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \ 1536 "Use semaphore synchronization for the GC Threads, " \ 1537 "instead of synchronization based on mutexes") \ 1538 \ 1539 product(bool, UseDynamicNumberOfGCThreads, false, \ 1540 "Dynamically choose the number of parallel threads " \ 1541 "parallel gc will use") \ 1542 \ 1543 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1544 "Force dynamic selection of the number of " \ 1545 "parallel threads parallel gc will use to aid debugging") \ 1546 \ 1547 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1548 "Size of heap (bytes) per GC thread used in calculating the " \ 1549 "number of GC threads") \ 1550 range((size_t)os::vm_page_size(), (size_t)max_uintx) \ 1551 \ 1552 product(uint, ConcGCThreads, 0, \ 1553 "Number of threads concurrent gc will use") \ 1554 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \ 1555 \ 1556 product(uintx, GCTaskTimeStampEntries, 200, \ 1557 "Number of time stamp entries per gc worker thread") \ 1558 range(1, max_uintx) \ 1559 \ 1560 product(bool, AlwaysTenure, false, \ 1561 "Always tenure objects in eden (ParallelGC only)") \ 1562 \ 1563 product(bool, NeverTenure, false, \ 1564 "Never tenure objects in eden, may tenure on overflow " \ 1565 "(ParallelGC only)") \ 1566 \ 1567 product(bool, ScavengeBeforeFullGC, true, \ 1568 "Scavenge youngest generation before each full GC.") \ 1569 \ 1570 product(bool, UseConcMarkSweepGC, false, \ 1571 "Use Concurrent Mark-Sweep GC in the old generation") \ 1572 \ 1573 product(bool, ExplicitGCInvokesConcurrent, false, \ 1574 "A System.gc() request invokes a concurrent collection; " \ 1575 "(effective only when using concurrent collectors)") \ 1576 \ 1577 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1578 "A System.gc() request invokes a concurrent collection and " \ 1579 "also unloads classes during such a concurrent gc cycle " \ 1580 "(effective only when UseConcMarkSweepGC)") \ 1581 \ 1582 product(bool, GCLockerInvokesConcurrent, false, \ 1583 "The exit of a JNI critical section necessitating a scavenge, " \ 1584 "also kicks off a background concurrent collection") \ 1585 \ 1586 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1587 "How much the GC can expand the eden by while the GC locker " \ 1588 "is active (as a percentage)") \ 1589 range(0, 100) \ 1590 \ 1591 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1592 "Number of times to retry allocations when " \ 1593 "blocked by the GC locker") \ 1594 range(0, max_uintx) \ 1595 \ 1596 product(bool, UseCMSBestFit, true, \ 1597 "Use CMS best fit allocation strategy") \ 1598 \ 1599 product(bool, UseParNewGC, false, \ 1600 "Use parallel threads in the new generation") \ 1601 \ 1602 product(uintx, ParallelGCBufferWastePct, 10, \ 1603 "Wasted fraction of parallel allocation buffer") \ 1604 range(0, 100) \ 1605 \ 1606 product(uintx, TargetPLABWastePct, 10, \ 1607 "Target wasted space in last buffer as percent of overall " \ 1608 "allocation") \ 1609 range(1, 100) \ 1610 \ 1611 product(uintx, PLABWeight, 75, \ 1612 "Percentage (0-100) used to weight the current sample when " \ 1613 "computing exponentially decaying average for ResizePLAB") \ 1614 range(0, 100) \ 1615 \ 1616 product(bool, ResizePLAB, true, \ 1617 "Dynamically resize (survivor space) promotion LAB's") \ 1618 \ 1619 product(int, ParGCArrayScanChunk, 50, \ 1620 "Scan a subset of object array and push remainder, if array is " \ 1621 "bigger than this") \ 1622 range(1, max_jint/3) \ 1623 \ 1624 product(bool, ParGCUseLocalOverflow, false, \ 1625 "Instead of a global overflow list, use local overflow stacks") \ 1626 \ 1627 product(bool, ParGCTrimOverflow, true, \ 1628 "Eagerly trim the local overflow lists " \ 1629 "(when ParGCUseLocalOverflow)") \ 1630 \ 1631 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1632 "Simulate work queue overflow in ParNew") \ 1633 \ 1634 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1635 "An `interval' counter that determines how frequently " \ 1636 "we simulate overflow; a smaller number increases frequency") \ 1637 \ 1638 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1639 "The desired number of objects to claim from the overflow list") \ 1640 range(0, max_uintx) \ 1641 \ 1642 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1643 "The number of strides per worker thread that we divide up the " \ 1644 "card table scanning work into") \ 1645 range(1, max_uintx) \ 1646 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \ 1647 \ 1648 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1649 "The number of cards in each chunk of the parallel chunks used " \ 1650 "during card table scanning") \ 1651 range(1, max_intx) \ 1652 constraint(ParGCCardsPerStrideChunkConstraintFunc,AfterMemoryInit)\ 1653 \ 1654 product(uintx, OldPLABWeight, 50, \ 1655 "Percentage (0-100) used to weight the current sample when " \ 1656 "computing exponentially decaying average for resizing " \ 1657 "OldPLABSize") \ 1658 range(0, 100) \ 1659 \ 1660 product(bool, ResizeOldPLAB, true, \ 1661 "Dynamically resize (old gen) promotion LAB's") \ 1662 \ 1663 product(size_t, CMSOldPLABMax, 1024, \ 1664 "Maximum size of CMS gen promotion LAB caches per worker " \ 1665 "per block size") \ 1666 range(1, max_uintx) \ 1667 constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \ 1668 \ 1669 product(size_t, CMSOldPLABMin, 16, \ 1670 "Minimum size of CMS gen promotion LAB caches per worker " \ 1671 "per block size") \ 1672 range(1, max_uintx) \ 1673 constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \ 1674 \ 1675 product(uintx, CMSOldPLABNumRefills, 4, \ 1676 "Nominal number of refills of CMS gen promotion LAB cache " \ 1677 "per worker per block size") \ 1678 range(1, max_uintx) \ 1679 \ 1680 product(bool, CMSOldPLABResizeQuicker, false, \ 1681 "React on-the-fly during a scavenge to a sudden " \ 1682 "change in block demand rate") \ 1683 \ 1684 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1685 "The tolerance of the phase-change detector for on-the-fly " \ 1686 "PLAB resizing during a scavenge") \ 1687 range(1, max_uintx) \ 1688 \ 1689 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1690 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1691 "during a scavenge") \ 1692 range(1, max_uintx) \ 1693 \ 1694 product(bool, AlwaysPreTouch, false, \ 1695 "Force all freshly committed pages to be pre-touched") \ 1696 \ 1697 product_pd(size_t, CMSYoungGenPerWorker, \ 1698 "The maximum size of young gen chosen by default per GC worker " \ 1699 "thread available") \ 1700 range(1, max_uintx) \ 1701 \ 1702 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1703 "Percentage (0-100) used to add conservatism when computing the " \ 1704 "duty cycle") \ 1705 range(0, 100) \ 1706 \ 1707 product(uintx, CMSExpAvgFactor, 50, \ 1708 "Percentage (0-100) used to weight the current sample when " \ 1709 "computing exponential averages for CMS statistics") \ 1710 range(0, 100) \ 1711 \ 1712 product(uintx, CMS_FLSWeight, 75, \ 1713 "Percentage (0-100) used to weight the current sample when " \ 1714 "computing exponentially decaying averages for CMS FLS " \ 1715 "statistics") \ 1716 range(0, 100) \ 1717 \ 1718 product(uintx, CMS_FLSPadding, 1, \ 1719 "The multiple of deviation from mean to use for buffering " \ 1720 "against volatility in free list demand") \ 1721 range(0, max_juint) \ 1722 \ 1723 product(uintx, FLSCoalescePolicy, 2, \ 1724 "CMS: aggressiveness level for coalescing, increasing " \ 1725 "from 0 to 4") \ 1726 range(0, 4) \ 1727 \ 1728 product(bool, FLSAlwaysCoalesceLarge, false, \ 1729 "CMS: larger free blocks are always available for coalescing") \ 1730 \ 1731 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1732 "CMS: the smaller the percentage the greater the coalescing " \ 1733 "force") \ 1734 range(0.0, 1.0) \ 1735 \ 1736 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1737 "CMS: the factor by which to inflate estimated demand of small " \ 1738 "block sizes to prevent coalescing with an adjoining block") \ 1739 range(0.0, DBL_MAX) \ 1740 \ 1741 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1742 "CMS: the factor by which to inflate estimated demand of large " \ 1743 "block sizes to prevent coalescing with an adjoining block") \ 1744 range(0.0, DBL_MAX) \ 1745 \ 1746 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1747 "CMS: the factor by which to inflate estimated demand of small " \ 1748 "block sizes to prevent splitting to supply demand for smaller " \ 1749 "blocks") \ 1750 range(0.0, DBL_MAX) \ 1751 \ 1752 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1753 "CMS: the factor by which to inflate estimated demand of large " \ 1754 "block sizes to prevent splitting to supply demand for smaller " \ 1755 "blocks") \ 1756 range(0.0, DBL_MAX) \ 1757 \ 1758 product(bool, CMSExtrapolateSweep, false, \ 1759 "CMS: cushion for block demand during sweep") \ 1760 \ 1761 product(uintx, CMS_SweepWeight, 75, \ 1762 "Percentage (0-100) used to weight the current sample when " \ 1763 "computing exponentially decaying average for inter-sweep " \ 1764 "duration") \ 1765 range(0, 100) \ 1766 \ 1767 product(uintx, CMS_SweepPadding, 1, \ 1768 "The multiple of deviation from mean to use for buffering " \ 1769 "against volatility in inter-sweep duration") \ 1770 range(0, max_juint) \ 1771 \ 1772 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1773 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1774 "duration exceeds this threshold in milliseconds") \ 1775 range(0, max_uintx) \ 1776 \ 1777 product(bool, CMSClassUnloadingEnabled, true, \ 1778 "Whether class unloading enabled when using CMS GC") \ 1779 \ 1780 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1781 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1782 "count for which classes may not be unloaded") \ 1783 range(0, max_uintx) \ 1784 \ 1785 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1786 "Replenish an indexed free list with this number of chunks") \ 1787 range(1, max_uintx) \ 1788 \ 1789 product(bool, CMSReplenishIntermediate, true, \ 1790 "Replenish all intermediate free-list caches") \ 1791 \ 1792 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1793 "When satisfying batched demand, split blocks from the " \ 1794 "IndexedFreeList whose size is a multiple of requested size") \ 1795 \ 1796 product(bool, CMSLoopWarn, false, \ 1797 "Warn in case of excessive CMS looping") \ 1798 \ 1799 /* where does the range max value of (max_jint - 1) come from? */ \ 1800 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1801 "Maximum size of marking stack") \ 1802 range(1, (max_jint - 1)) \ 1803 \ 1804 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1805 "Size of marking stack") \ 1806 constraint(MarkStackSizeConstraintFunc,AfterErgo) \ 1807 \ 1808 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1809 "Simulate frequent marking stack / work queue overflow") \ 1810 \ 1811 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1812 "An \"interval\" counter that determines how frequently " \ 1813 "to simulate overflow; a smaller number increases frequency") \ 1814 \ 1815 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1816 "Maximum number of abortable preclean iterations, if > 0") \ 1817 range(0, max_uintx) \ 1818 \ 1819 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1820 "Maximum time in abortable preclean (in milliseconds)") \ 1821 range(0, max_intx) \ 1822 \ 1823 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1824 "Nominal minimum work per abortable preclean iteration") \ 1825 range(0, max_uintx) \ 1826 \ 1827 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1828 "Time that we sleep between iterations when not given " \ 1829 "enough work per iteration") \ 1830 range(0, max_intx) \ 1831 \ 1832 /* 4096 = CardTableModRefBS::card_size_in_words * BitsPerWord */ \ 1833 product(size_t, CMSRescanMultiple, 32, \ 1834 "Size (in cards) of CMS parallel rescan task") \ 1835 range(1, SIZE_MAX / 4096) \ 1836 constraint(CMSRescanMultipleConstraintFunc,AfterMemoryInit) \ 1837 \ 1838 /* 4096 = CardTableModRefBS::card_size_in_words * BitsPerWord */ \ 1839 product(size_t, CMSConcMarkMultiple, 32, \ 1840 "Size (in cards) of CMS concurrent MT marking task") \ 1841 range(1, SIZE_MAX / 4096) \ 1842 constraint(CMSConcMarkMultipleConstraintFunc,AfterMemoryInit) \ 1843 \ 1844 product(bool, CMSAbortSemantics, false, \ 1845 "Whether abort-on-overflow semantics is implemented") \ 1846 \ 1847 product(bool, CMSParallelInitialMarkEnabled, true, \ 1848 "Use the parallel initial mark.") \ 1849 \ 1850 product(bool, CMSParallelRemarkEnabled, true, \ 1851 "Whether parallel remark enabled (only if ParNewGC)") \ 1852 \ 1853 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1854 "Whether parallel remark of survivor space " \ 1855 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1856 \ 1857 product(bool, CMSPLABRecordAlways, true, \ 1858 "Always record survivor space PLAB boundaries (effective only " \ 1859 "if CMSParallelSurvivorRemarkEnabled)") \ 1860 \ 1861 product(bool, CMSEdenChunksRecordAlways, true, \ 1862 "Always record eden chunks used for the parallel initial mark " \ 1863 "or remark of eden") \ 1864 \ 1865 product(bool, CMSConcurrentMTEnabled, true, \ 1866 "Whether multi-threaded concurrent work enabled " \ 1867 "(effective only if ParNewGC)") \ 1868 \ 1869 product(bool, CMSPrecleaningEnabled, true, \ 1870 "Whether concurrent precleaning enabled") \ 1871 \ 1872 product(uintx, CMSPrecleanIter, 3, \ 1873 "Maximum number of precleaning iteration passes") \ 1874 range(0, 9) \ 1875 \ 1876 product(uintx, CMSPrecleanDenominator, 3, \ 1877 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1878 "ratio") \ 1879 range(1, max_uintx) \ 1880 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \ 1881 \ 1882 product(uintx, CMSPrecleanNumerator, 2, \ 1883 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1884 "ratio") \ 1885 range(0, max_uintx-1) \ 1886 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \ 1887 \ 1888 product(bool, CMSPrecleanRefLists1, true, \ 1889 "Preclean ref lists during (initial) preclean phase") \ 1890 \ 1891 product(bool, CMSPrecleanRefLists2, false, \ 1892 "Preclean ref lists during abortable preclean phase") \ 1893 \ 1894 product(bool, CMSPrecleanSurvivors1, false, \ 1895 "Preclean survivors during (initial) preclean phase") \ 1896 \ 1897 product(bool, CMSPrecleanSurvivors2, true, \ 1898 "Preclean survivors during abortable preclean phase") \ 1899 \ 1900 product(uintx, CMSPrecleanThreshold, 1000, \ 1901 "Do not iterate again if number of dirty cards is less than this")\ 1902 range(100, max_uintx) \ 1903 \ 1904 product(bool, CMSCleanOnEnter, true, \ 1905 "Clean-on-enter optimization for reducing number of dirty cards") \ 1906 \ 1907 product(uintx, CMSRemarkVerifyVariant, 1, \ 1908 "Choose variant (1,2) of verification following remark") \ 1909 range(1, 2) \ 1910 \ 1911 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1912 "If Eden size is below this, do not try to schedule remark") \ 1913 range(0, max_uintx) \ 1914 \ 1915 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1916 "The Eden occupancy percentage (0-100) at which " \ 1917 "to try and schedule remark pause") \ 1918 range(0, 100) \ 1919 \ 1920 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1921 "Start sampling eden top at least before young gen " \ 1922 "occupancy reaches 1/<ratio> of the size at which " \ 1923 "we plan to schedule remark") \ 1924 range(1, max_uintx) \ 1925 \ 1926 product(uintx, CMSSamplingGrain, 16*K, \ 1927 "The minimum distance between eden samples for CMS (see above)") \ 1928 range(ObjectAlignmentInBytes, max_uintx) \ 1929 constraint(CMSSamplingGrainConstraintFunc,AfterMemoryInit) \ 1930 \ 1931 product(bool, CMSScavengeBeforeRemark, false, \ 1932 "Attempt scavenge before the CMS remark step") \ 1933 \ 1934 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1935 "Don't drain below this size per parallel worker/thief") \ 1936 range(1, max_juint) \ 1937 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \ 1938 \ 1939 manageable(intx, CMSWaitDuration, 2000, \ 1940 "Time in milliseconds that CMS thread waits for young GC") \ 1941 range(min_jint, max_jint) \ 1942 \ 1943 develop(uintx, CMSCheckInterval, 1000, \ 1944 "Interval in milliseconds that CMS thread checks if it " \ 1945 "should start a collection cycle") \ 1946 \ 1947 product(bool, CMSYield, true, \ 1948 "Yield between steps of CMS") \ 1949 \ 1950 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1951 "Bitmap operations should process at most this many bits " \ 1952 "between yields") \ 1953 range(1, max_uintx) \ 1954 constraint(CMSBitMapYieldQuantumConstraintFunc,AfterMemoryInit) \ 1955 \ 1956 product(bool, CMSPrintChunksInDump, false, \ 1957 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \ 1958 "trace level include more detailed information about the" \ 1959 "free chunks") \ 1960 \ 1961 product(bool, CMSPrintObjectsInDump, false, \ 1962 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \ 1963 "trace level include more detailed information about the" \ 1964 "allocated objects") \ 1965 \ 1966 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1967 "Verify that all references across the FLS boundary " \ 1968 "are to valid objects") \ 1969 \ 1970 diagnostic(bool, FLSVerifyLists, false, \ 1971 "Do lots of (expensive) FreeListSpace verification") \ 1972 \ 1973 diagnostic(bool, FLSVerifyIndexTable, false, \ 1974 "Do lots of (expensive) FLS index table verification") \ 1975 \ 1976 develop(bool, FLSVerifyDictionary, false, \ 1977 "Do lots of (expensive) FLS dictionary verification") \ 1978 \ 1979 develop(bool, VerifyBlockOffsetArray, false, \ 1980 "Do (expensive) block offset array verification") \ 1981 \ 1982 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1983 "Maintain _unallocated_block in BlockOffsetArray " \ 1984 "(currently applicable only to CMS collector)") \ 1985 \ 1986 product(intx, RefDiscoveryPolicy, 0, \ 1987 "Select type of reference discovery policy: " \ 1988 "reference-based(0) or referent-based(1)") \ 1989 range(ReferenceProcessor::DiscoveryPolicyMin, \ 1990 ReferenceProcessor::DiscoveryPolicyMax) \ 1991 \ 1992 product(bool, ParallelRefProcEnabled, false, \ 1993 "Enable parallel reference processing whenever possible") \ 1994 \ 1995 product(bool, ParallelRefProcBalancingEnabled, true, \ 1996 "Enable balancing of reference processing queues") \ 1997 \ 1998 product(uintx, CMSTriggerRatio, 80, \ 1999 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 2000 "allocated before a CMS collection cycle commences") \ 2001 range(0, 100) \ 2002 \ 2003 product(uintx, CMSBootstrapOccupancy, 50, \ 2004 "Percentage CMS generation occupancy at which to " \ 2005 "initiate CMS collection for bootstrapping collection stats") \ 2006 range(0, 100) \ 2007 \ 2008 product(intx, CMSInitiatingOccupancyFraction, -1, \ 2009 "Percentage CMS generation occupancy to start a CMS collection " \ 2010 "cycle. A negative value means that CMSTriggerRatio is used") \ 2011 range(min_intx, 100) \ 2012 \ 2013 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 2014 "The percent occupancy (IHOP) of the current old generation " \ 2015 "capacity above which a concurrent mark cycle will be initiated " \ 2016 "Its value may change over time if adaptive IHOP is enabled, " \ 2017 "otherwise the value remains constant. " \ 2018 "In the latter case a value of 0 will result as frequent as " \ 2019 "possible concurrent marking cycles. A value of 100 disables " \ 2020 "concurrent marking. " \ 2021 "Fragmentation waste in the old generation is not considered " \ 2022 "free space in this calculation. (G1 collector only)") \ 2023 range(0, 100) \ 2024 \ 2025 manageable(intx, CMSTriggerInterval, -1, \ 2026 "Commence a CMS collection cycle (at least) every so many " \ 2027 "milliseconds (0 permanently, -1 disabled)") \ 2028 range(-1, max_intx) \ 2029 \ 2030 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2031 "Only use occupancy as a criterion for starting a CMS collection")\ 2032 \ 2033 product(uintx, CMSIsTooFullPercentage, 98, \ 2034 "An absolute ceiling above which CMS will always consider the " \ 2035 "unloading of classes when class unloading is enabled") \ 2036 range(0, 100) \ 2037 \ 2038 develop(bool, CMSTestInFreeList, false, \ 2039 "Check if the coalesced range is already in the " \ 2040 "free lists as claimed") \ 2041 \ 2042 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2043 "Check that all the garbage collected was returned to the " \ 2044 "free lists") \ 2045 \ 2046 notproduct(bool, ScavengeALot, false, \ 2047 "Force scavenge at every Nth exit from the runtime system " \ 2048 "(N=ScavengeALotInterval)") \ 2049 \ 2050 develop(bool, FullGCALot, false, \ 2051 "Force full gc at every Nth exit from the runtime system " \ 2052 "(N=FullGCALotInterval)") \ 2053 \ 2054 notproduct(bool, GCALotAtAllSafepoints, false, \ 2055 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2056 \ 2057 notproduct(bool, PromotionFailureALot, false, \ 2058 "Use promotion failure handling on every youngest generation " \ 2059 "collection") \ 2060 \ 2061 develop(uintx, PromotionFailureALotCount, 1000, \ 2062 "Number of promotion failures occurring at PLAB " \ 2063 "refill attempts (ParNew) or promotion attempts " \ 2064 "(other young collectors)") \ 2065 \ 2066 develop(uintx, PromotionFailureALotInterval, 5, \ 2067 "Total collections between promotion failures a lot") \ 2068 \ 2069 experimental(uintx, WorkStealingSleepMillis, 1, \ 2070 "Sleep time when sleep is used for yields") \ 2071 \ 2072 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2073 "Number of yields before a sleep is done during work stealing") \ 2074 \ 2075 experimental(uintx, WorkStealingHardSpins, 4096, \ 2076 "Number of iterations in a spin loop between checks on " \ 2077 "time out of hard spin") \ 2078 \ 2079 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2080 "Ratio of hard spins to calls to yield") \ 2081 \ 2082 develop(uintx, ObjArrayMarkingStride, 512, \ 2083 "Number of object array elements to push onto the marking stack " \ 2084 "before pushing a continuation entry") \ 2085 \ 2086 develop(bool, MetadataAllocationFailALot, false, \ 2087 "Fail metadata allocations at intervals controlled by " \ 2088 "MetadataAllocationFailALotInterval") \ 2089 \ 2090 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2091 "Metadata allocation failure a lot interval") \ 2092 \ 2093 notproduct(bool, ExecuteInternalVMTests, false, \ 2094 "Enable execution of internal VM tests") \ 2095 \ 2096 notproduct(bool, VerboseInternalVMTests, false, \ 2097 "Turn on logging for internal VM tests.") \ 2098 \ 2099 product(bool, ExecutingUnitTests, false, \ 2100 "Whether the JVM is running unit tests or not") \ 2101 \ 2102 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2103 \ 2104 product_pd(bool, ResizeTLAB, \ 2105 "Dynamically resize TLAB size for threads") \ 2106 \ 2107 product(bool, ZeroTLAB, false, \ 2108 "Zero out the newly created TLAB") \ 2109 \ 2110 product(bool, FastTLABRefill, true, \ 2111 "Use fast TLAB refill code") \ 2112 \ 2113 product(bool, TLABStats, true, \ 2114 "Provide more detailed and expensive TLAB statistics.") \ 2115 \ 2116 product_pd(bool, NeverActAsServerClassMachine, \ 2117 "Never act like a server-class machine") \ 2118 \ 2119 product(bool, AlwaysActAsServerClassMachine, false, \ 2120 "Always act like a server-class machine") \ 2121 \ 2122 product_pd(uint64_t, MaxRAM, \ 2123 "Real memory size (in bytes) used to set maximum heap size") \ 2124 range(0, 0XFFFFFFFFFFFFFFFF) \ 2125 \ 2126 product(size_t, ErgoHeapSizeLimit, 0, \ 2127 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2128 "MaxRAM / MaxRAMFraction") \ 2129 range(0, max_uintx) \ 2130 \ 2131 product(uintx, MaxRAMFraction, 4, \ 2132 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2133 "size") \ 2134 range(1, max_uintx) \ 2135 \ 2136 product(uintx, MinRAMFraction, 2, \ 2137 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2138 "size on systems with small physical memory size") \ 2139 range(1, max_uintx) \ 2140 \ 2141 product(uintx, InitialRAMFraction, 64, \ 2142 "Fraction (1/n) of real memory used for initial heap size") \ 2143 range(1, max_uintx) \ 2144 \ 2145 develop(uintx, MaxVirtMemFraction, 2, \ 2146 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2147 "determining maximum heap size") \ 2148 \ 2149 product(bool, UseAutoGCSelectPolicy, false, \ 2150 "Use automatic collection selection policy") \ 2151 \ 2152 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2153 "Automatic GC selection pause threshold in milliseconds") \ 2154 range(0, max_uintx) \ 2155 \ 2156 product(bool, UseAdaptiveSizePolicy, true, \ 2157 "Use adaptive generation sizing policies") \ 2158 \ 2159 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2160 "Use adaptive survivor sizing policies") \ 2161 \ 2162 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2163 "Use adaptive young-old sizing policies at minor collections") \ 2164 \ 2165 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2166 "Use adaptive young-old sizing policies at major collections") \ 2167 \ 2168 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2169 "Include statistics from System.gc() for adaptive size policy") \ 2170 \ 2171 product(bool, UseAdaptiveGCBoundary, false, \ 2172 "Allow young-old boundary to move") \ 2173 \ 2174 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2175 "Resize the virtual spaces of the young or old generations") \ 2176 range(-1, 1) \ 2177 \ 2178 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2179 "Policy for changing generation size for throughput goals") \ 2180 range(0, 1) \ 2181 \ 2182 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2183 "Number of steps where heuristics is used before data is used") \ 2184 range(0, max_uintx) \ 2185 \ 2186 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2187 "Number of collections before the adaptive sizing is started") \ 2188 \ 2189 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2190 "Collection interval for printing information; zero means never") \ 2191 range(0, max_uintx) \ 2192 \ 2193 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2194 "Use adaptive minimum footprint as a goal") \ 2195 \ 2196 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2197 "Weight given to exponential resizing, between 0 and 100") \ 2198 range(0, 100) \ 2199 \ 2200 product(uintx, AdaptiveTimeWeight, 25, \ 2201 "Weight given to time in adaptive policy, between 0 and 100") \ 2202 range(0, 100) \ 2203 \ 2204 product(uintx, PausePadding, 1, \ 2205 "How much buffer to keep for pause time") \ 2206 range(0, max_juint) \ 2207 \ 2208 product(uintx, PromotedPadding, 3, \ 2209 "How much buffer to keep for promotion failure") \ 2210 range(0, max_juint) \ 2211 \ 2212 product(uintx, SurvivorPadding, 3, \ 2213 "How much buffer to keep for survivor overflow") \ 2214 range(0, max_juint) \ 2215 \ 2216 product(uintx, ThresholdTolerance, 10, \ 2217 "Allowed collection cost difference between generations") \ 2218 range(0, 100) \ 2219 \ 2220 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2221 "If collection costs are within margin, reduce both by full " \ 2222 "delta") \ 2223 range(0, 100) \ 2224 \ 2225 product(uintx, YoungGenerationSizeIncrement, 20, \ 2226 "Adaptive size percentage change in young generation") \ 2227 range(0, 100) \ 2228 \ 2229 product(uintx, YoungGenerationSizeSupplement, 80, \ 2230 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2231 range(0, 100) \ 2232 \ 2233 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2234 "Decay factor to YoungedGenerationSizeSupplement") \ 2235 range(1, max_uintx) \ 2236 \ 2237 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2238 "Adaptive size percentage change in tenured generation") \ 2239 range(0, 100) \ 2240 \ 2241 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2242 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2243 range(0, 100) \ 2244 \ 2245 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2246 "Decay factor to TenuredGenerationSizeIncrement") \ 2247 range(1, max_uintx) \ 2248 \ 2249 product(uintx, MaxGCPauseMillis, max_uintx - 1, \ 2250 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2251 "or (G1 Only) the maximum GC time per MMU time slice") \ 2252 range(1, max_uintx - 1) \ 2253 constraint(MaxGCPauseMillisConstraintFunc,AfterErgo) \ 2254 \ 2255 product(uintx, GCPauseIntervalMillis, 0, \ 2256 "Time slice for MMU specification") \ 2257 constraint(GCPauseIntervalMillisConstraintFunc,AfterErgo) \ 2258 \ 2259 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2260 "Adaptive size policy maximum GC minor pause time goal " \ 2261 "in millisecond") \ 2262 range(0, max_uintx) \ 2263 \ 2264 product(uintx, GCTimeRatio, 99, \ 2265 "Adaptive size policy application time to GC time ratio") \ 2266 range(0, max_juint) \ 2267 \ 2268 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2269 "Adaptive size scale down factor for shrinking") \ 2270 range(1, max_uintx) \ 2271 \ 2272 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2273 "Adaptive size decays the major cost for long major intervals") \ 2274 \ 2275 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2276 "Time scale over which major costs decay") \ 2277 range(0, max_uintx) \ 2278 \ 2279 product(uintx, MinSurvivorRatio, 3, \ 2280 "Minimum ratio of young generation/survivor space size") \ 2281 range(3, max_uintx) \ 2282 \ 2283 product(uintx, InitialSurvivorRatio, 8, \ 2284 "Initial ratio of young generation/survivor space size") \ 2285 range(0, max_uintx) \ 2286 \ 2287 product(size_t, BaseFootPrintEstimate, 256*M, \ 2288 "Estimate of footprint other than Java Heap") \ 2289 range(0, max_uintx) \ 2290 \ 2291 product(bool, UseGCOverheadLimit, true, \ 2292 "Use policy to limit of proportion of time spent in GC " \ 2293 "before an OutOfMemory error is thrown") \ 2294 \ 2295 product(uintx, GCTimeLimit, 98, \ 2296 "Limit of the proportion of time spent in GC before " \ 2297 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2298 range(0, 100) \ 2299 \ 2300 product(uintx, GCHeapFreeLimit, 2, \ 2301 "Minimum percentage of free space after a full GC before an " \ 2302 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2303 range(0, 100) \ 2304 \ 2305 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2306 "Number of consecutive collections before gc time limit fires") \ 2307 range(1, max_uintx) \ 2308 \ 2309 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2310 "How far ahead to prefetch destination area (<= 0 means off)") \ 2311 range(-1, max_jint) \ 2312 \ 2313 product(intx, PrefetchScanIntervalInBytes, -1, \ 2314 "How far ahead to prefetch scan area (<= 0 means off)") \ 2315 range(-1, max_jint) \ 2316 \ 2317 product(intx, PrefetchFieldsAhead, -1, \ 2318 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2319 range(-1, max_jint) \ 2320 \ 2321 diagnostic(bool, VerifyDuringStartup, false, \ 2322 "Verify memory system before executing any Java code " \ 2323 "during VM initialization") \ 2324 \ 2325 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2326 "Verify system before exiting") \ 2327 \ 2328 diagnostic(bool, VerifyBeforeGC, false, \ 2329 "Verify memory system before GC") \ 2330 \ 2331 diagnostic(bool, VerifyAfterGC, false, \ 2332 "Verify memory system after GC") \ 2333 \ 2334 diagnostic(bool, VerifyDuringGC, false, \ 2335 "Verify memory system during GC (between phases)") \ 2336 \ 2337 diagnostic(ccstrlist, VerifySubSet, "", \ 2338 "Memory sub-systems to verify when Verify*GC flag(s) " \ 2339 "are enabled. One or more sub-systems can be specified " \ 2340 "in a comma separated string. Sub-systems are: " \ 2341 "threads, heap, symbol_table, string_table, codecache, " \ 2342 "dictionary, classloader_data_graph, metaspace, jni_handles, " \ 2343 "c-heap, codecache_oops") \ 2344 \ 2345 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2346 "Enable parallel memory system verification") \ 2347 \ 2348 diagnostic(bool, DeferInitialCardMark, false, \ 2349 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2350 "may arise from new_pre_store_barrier") \ 2351 \ 2352 product(bool, UseCondCardMark, false, \ 2353 "Check for already marked card before updating card table") \ 2354 \ 2355 diagnostic(bool, VerifyRememberedSets, false, \ 2356 "Verify GC remembered sets") \ 2357 \ 2358 diagnostic(bool, VerifyObjectStartArray, true, \ 2359 "Verify GC object start array if verify before/after") \ 2360 \ 2361 product(bool, DisableExplicitGC, false, \ 2362 "Ignore calls to System.gc()") \ 2363 \ 2364 notproduct(bool, CheckMemoryInitialization, false, \ 2365 "Check memory initialization") \ 2366 \ 2367 diagnostic(bool, BindCMSThreadToCPU, false, \ 2368 "Bind CMS Thread to CPU if possible") \ 2369 \ 2370 diagnostic(uintx, CPUForCMSThread, 0, \ 2371 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2372 range(0, max_juint) \ 2373 \ 2374 product(bool, BindGCTaskThreadsToCPUs, false, \ 2375 "Bind GCTaskThreads to CPUs if possible") \ 2376 \ 2377 product(bool, UseGCTaskAffinity, false, \ 2378 "Use worker affinity when asking for GCTasks") \ 2379 \ 2380 product(uintx, ProcessDistributionStride, 4, \ 2381 "Stride through processors when distributing processes") \ 2382 range(0, max_juint) \ 2383 \ 2384 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2385 "Number of times the coordinator GC thread will sleep while " \ 2386 "yielding before giving up and resuming GC") \ 2387 range(0, max_juint) \ 2388 \ 2389 product(uintx, CMSYieldSleepCount, 0, \ 2390 "Number of times a GC thread (minus the coordinator) " \ 2391 "will sleep while yielding before giving up and resuming GC") \ 2392 range(0, max_juint) \ 2393 \ 2394 product(bool, PrintGC, false, \ 2395 "Print message at garbage collection. " \ 2396 "Deprecated, use -Xlog:gc instead.") \ 2397 \ 2398 product(bool, PrintGCDetails, false, \ 2399 "Print more details at garbage collection. " \ 2400 "Deprecated, use -Xlog:gc* instead.") \ 2401 \ 2402 develop(intx, ConcGCYieldTimeout, 0, \ 2403 "If non-zero, assert that GC threads yield within this " \ 2404 "number of milliseconds") \ 2405 range(0, max_intx) \ 2406 \ 2407 develop(bool, TraceFinalizerRegistration, false, \ 2408 "Trace registration of final references") \ 2409 \ 2410 notproduct(bool, TraceScavenge, false, \ 2411 "Trace scavenge") \ 2412 \ 2413 product(bool, IgnoreEmptyClassPaths, false, \ 2414 "Ignore empty path elements in -classpath") \ 2415 \ 2416 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2417 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2418 "Initial size of the boot class loader data metaspace") \ 2419 range(30*K, max_uintx/BytesPerWord) \ 2420 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 2421 \ 2422 product(bool, TraceYoungGenTime, false, \ 2423 "Trace accumulated time for young collection") \ 2424 \ 2425 product(bool, TraceOldGenTime, false, \ 2426 "Trace accumulated time for old collection") \ 2427 \ 2428 product(bool, PrintHeapAtSIGBREAK, true, \ 2429 "Print heap layout in response to SIGBREAK") \ 2430 \ 2431 manageable(bool, PrintClassHistogram, false, \ 2432 "Print a histogram of class instances") \ 2433 \ 2434 develop(bool, TraceGCTaskManager, false, \ 2435 "Trace actions of the GC task manager") \ 2436 \ 2437 develop(bool, TraceGCTaskQueue, false, \ 2438 "Trace actions of the GC task queues") \ 2439 \ 2440 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2441 "Trace marking phase in ParallelOldGC") \ 2442 \ 2443 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2444 "Trace dense prefix computation for ParallelOldGC") \ 2445 \ 2446 develop(bool, IgnoreLibthreadGPFault, false, \ 2447 "Suppress workaround for libthread GP fault") \ 2448 \ 2449 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2450 "The percentage of the used heap that the instances of a class " \ 2451 "must occupy for the class to generate a trace event") \ 2452 range(0.0, 100.0) \ 2453 \ 2454 /* JVMTI heap profiling */ \ 2455 \ 2456 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2457 "Trace JVMTI object tagging calls") \ 2458 \ 2459 diagnostic(bool, VerifyBeforeIteration, false, \ 2460 "Verify memory system before JVMTI iteration") \ 2461 \ 2462 /* compiler interface */ \ 2463 \ 2464 develop(bool, CIPrintCompilerName, false, \ 2465 "when CIPrint is active, print the name of the active compiler") \ 2466 \ 2467 diagnostic(bool, CIPrintCompileQueue, false, \ 2468 "display the contents of the compile queue whenever a " \ 2469 "compilation is enqueued") \ 2470 \ 2471 develop(bool, CIPrintRequests, false, \ 2472 "display every request for compilation") \ 2473 \ 2474 product(bool, CITime, false, \ 2475 "collect timing information for compilation") \ 2476 \ 2477 develop(bool, CITimeVerbose, false, \ 2478 "be more verbose in compilation timings") \ 2479 \ 2480 develop(bool, CITimeEach, false, \ 2481 "display timing information after each successful compilation") \ 2482 \ 2483 develop(bool, CICountOSR, false, \ 2484 "use a separate counter when assigning ids to osr compilations") \ 2485 \ 2486 develop(bool, CICompileNatives, true, \ 2487 "compile native methods if supported by the compiler") \ 2488 \ 2489 develop_pd(bool, CICompileOSR, \ 2490 "compile on stack replacement methods if supported by the " \ 2491 "compiler") \ 2492 \ 2493 develop(bool, CIPrintMethodCodes, false, \ 2494 "print method bytecodes of the compiled code") \ 2495 \ 2496 develop(bool, CIPrintTypeFlow, false, \ 2497 "print the results of ciTypeFlow analysis") \ 2498 \ 2499 develop(bool, CITraceTypeFlow, false, \ 2500 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2501 \ 2502 develop(intx, OSROnlyBCI, -1, \ 2503 "OSR only at this bci. Negative values mean exclude that bci") \ 2504 \ 2505 /* compiler */ \ 2506 \ 2507 /* notice: the max range value here is max_jint, not max_intx */ \ 2508 /* because of overflow issue */ \ 2509 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2510 "Number of compiler threads to run") \ 2511 range(0, max_jint) \ 2512 constraint(CICompilerCountConstraintFunc, AtParse) \ 2513 \ 2514 product(intx, CompilationPolicyChoice, 0, \ 2515 "which compilation policy (0-3)") \ 2516 range(0, 3) \ 2517 \ 2518 develop(bool, UseStackBanging, true, \ 2519 "use stack banging for stack overflow checks (required for " \ 2520 "proper StackOverflow handling; disable only to measure cost " \ 2521 "of stackbanging)") \ 2522 \ 2523 develop(bool, UseStrictFP, true, \ 2524 "use strict fp if modifier strictfp is set") \ 2525 \ 2526 develop(bool, GenerateSynchronizationCode, true, \ 2527 "generate locking/unlocking code for synchronized methods and " \ 2528 "monitors") \ 2529 \ 2530 develop(bool, GenerateRangeChecks, true, \ 2531 "Generate range checks for array accesses") \ 2532 \ 2533 diagnostic_pd(bool, ImplicitNullChecks, \ 2534 "Generate code for implicit null checks") \ 2535 \ 2536 product_pd(bool, TrapBasedNullChecks, \ 2537 "Generate code for null checks that uses a cmp and trap " \ 2538 "instruction raising SIGTRAP. This is only used if an access to" \ 2539 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2540 "ImplicitNullChecks don't work (PPC64).") \ 2541 \ 2542 product(bool, PrintSafepointStatistics, false, \ 2543 "Print statistics about safepoint synchronization") \ 2544 \ 2545 product(intx, PrintSafepointStatisticsCount, 300, \ 2546 "Total number of safepoint statistics collected " \ 2547 "before printing them out") \ 2548 range(1, max_intx) \ 2549 \ 2550 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2551 "Print safepoint statistics only when safepoint takes " \ 2552 "more than PrintSafepointSatisticsTimeout in millis") \ 2553 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 2554 NOT_LP64(range(-1, max_intx)) \ 2555 \ 2556 product(bool, Inline, true, \ 2557 "Enable inlining") \ 2558 \ 2559 product(bool, ClipInlining, true, \ 2560 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2561 \ 2562 develop(bool, UseCHA, true, \ 2563 "Enable CHA") \ 2564 \ 2565 product(bool, UseTypeProfile, true, \ 2566 "Check interpreter profile for historically monomorphic calls") \ 2567 \ 2568 diagnostic(bool, PrintInlining, false, \ 2569 "Print inlining optimizations") \ 2570 \ 2571 product(bool, UsePopCountInstruction, false, \ 2572 "Use population count instruction") \ 2573 \ 2574 develop(bool, EagerInitialization, false, \ 2575 "Eagerly initialize classes if possible") \ 2576 \ 2577 diagnostic(bool, LogTouchedMethods, false, \ 2578 "Log methods which have been ever touched in runtime") \ 2579 \ 2580 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 2581 "Print all methods that have been ever touched in runtime") \ 2582 \ 2583 develop(bool, TraceMethodReplacement, false, \ 2584 "Print when methods are replaced do to recompilation") \ 2585 \ 2586 develop(bool, PrintMethodFlushing, false, \ 2587 "Print the nmethods being flushed") \ 2588 \ 2589 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2590 "print statistics about method flushing") \ 2591 \ 2592 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2593 "Number of compiled code invocations after which " \ 2594 "the method is considered as hot by the flusher") \ 2595 range(1, max_jint) \ 2596 \ 2597 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2598 "Minimum number of sweeper passes before an nmethod " \ 2599 "can be flushed") \ 2600 range(0, max_intx) \ 2601 \ 2602 product(bool, UseCodeAging, true, \ 2603 "Insert counter to detect warm methods") \ 2604 \ 2605 diagnostic(bool, StressCodeAging, false, \ 2606 "Start with counters compiled in") \ 2607 \ 2608 develop(bool, UseRelocIndex, false, \ 2609 "Use an index to speed random access to relocations") \ 2610 \ 2611 develop(bool, StressCodeBuffers, false, \ 2612 "Exercise code buffer expansion and other rare state changes") \ 2613 \ 2614 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2615 "Generate extra debugging information for non-safepoints in " \ 2616 "nmethods") \ 2617 \ 2618 product(bool, PrintVMOptions, false, \ 2619 "Print flags that appeared on the command line") \ 2620 \ 2621 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2622 "Ignore unrecognized VM options") \ 2623 \ 2624 product(bool, PrintCommandLineFlags, false, \ 2625 "Print flags specified on command line or set by ergonomics") \ 2626 \ 2627 product(bool, PrintFlagsInitial, false, \ 2628 "Print all VM flags before argument processing and exit VM") \ 2629 \ 2630 product(bool, PrintFlagsFinal, false, \ 2631 "Print all VM flags after argument and ergonomic processing") \ 2632 \ 2633 notproduct(bool, PrintFlagsWithComments, false, \ 2634 "Print all VM flags with default values and descriptions and " \ 2635 "exit") \ 2636 \ 2637 product(bool, PrintFlagsRanges, false, \ 2638 "Print VM flags and their ranges and exit VM") \ 2639 \ 2640 diagnostic(bool, SerializeVMOutput, true, \ 2641 "Use a mutex to serialize output to tty and LogFile") \ 2642 \ 2643 diagnostic(bool, DisplayVMOutput, true, \ 2644 "Display all VM output on the tty, independently of LogVMOutput") \ 2645 \ 2646 diagnostic(bool, LogVMOutput, false, \ 2647 "Save VM output to LogFile") \ 2648 \ 2649 diagnostic(ccstr, LogFile, NULL, \ 2650 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2651 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2652 \ 2653 product(ccstr, ErrorFile, NULL, \ 2654 "If an error occurs, save the error data to this file " \ 2655 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2656 \ 2657 product(bool, DisplayVMOutputToStderr, false, \ 2658 "If DisplayVMOutput is true, display all VM output to stderr") \ 2659 \ 2660 product(bool, DisplayVMOutputToStdout, false, \ 2661 "If DisplayVMOutput is true, display all VM output to stdout") \ 2662 \ 2663 product(bool, UseHeavyMonitors, false, \ 2664 "use heavyweight instead of lightweight Java monitors") \ 2665 \ 2666 product(bool, PrintStringTableStatistics, false, \ 2667 "print statistics about the StringTable and SymbolTable") \ 2668 \ 2669 diagnostic(bool, VerifyStringTableAtExit, false, \ 2670 "verify StringTable contents at exit") \ 2671 \ 2672 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2673 "print histogram of the symbol table") \ 2674 \ 2675 notproduct(bool, ExitVMOnVerifyError, false, \ 2676 "standard exit from VM if bytecode verify error " \ 2677 "(only in debug mode)") \ 2678 \ 2679 diagnostic(ccstr, AbortVMOnException, NULL, \ 2680 "Call fatal if this exception is thrown. Example: " \ 2681 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2682 \ 2683 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 2684 "Call fatal if the exception pointed by AbortVMOnException " \ 2685 "has this message") \ 2686 \ 2687 develop(bool, DebugVtables, false, \ 2688 "add debugging code to vtable dispatch") \ 2689 \ 2690 notproduct(bool, PrintVtableStats, false, \ 2691 "print vtables stats at end of run") \ 2692 \ 2693 develop(bool, TraceCreateZombies, false, \ 2694 "trace creation of zombie nmethods") \ 2695 \ 2696 notproduct(bool, IgnoreLockingAssertions, false, \ 2697 "disable locking assertions (for speed)") \ 2698 \ 2699 product(bool, RangeCheckElimination, true, \ 2700 "Eliminate range checks") \ 2701 \ 2702 develop_pd(bool, UncommonNullCast, \ 2703 "track occurrences of null in casts; adjust compiler tactics") \ 2704 \ 2705 develop(bool, TypeProfileCasts, true, \ 2706 "treat casts like calls for purposes of type profiling") \ 2707 \ 2708 develop(bool, DelayCompilationDuringStartup, true, \ 2709 "Delay invoking the compiler until main application class is " \ 2710 "loaded") \ 2711 \ 2712 develop(bool, CompileTheWorld, false, \ 2713 "Compile all methods in all classes in bootstrap class path " \ 2714 "(stress test)") \ 2715 \ 2716 develop(bool, CompileTheWorldPreloadClasses, true, \ 2717 "Preload all classes used by a class before start loading") \ 2718 \ 2719 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2720 "Force a safepoint every n compiles so sweeper can keep up") \ 2721 \ 2722 develop(bool, FillDelaySlots, true, \ 2723 "Fill delay slots (on SPARC only)") \ 2724 \ 2725 develop(bool, TimeLivenessAnalysis, false, \ 2726 "Time computation of bytecode liveness analysis") \ 2727 \ 2728 develop(bool, TraceLivenessGen, false, \ 2729 "Trace the generation of liveness analysis information") \ 2730 \ 2731 notproduct(bool, TraceLivenessQuery, false, \ 2732 "Trace queries of liveness analysis information") \ 2733 \ 2734 notproduct(bool, CollectIndexSetStatistics, false, \ 2735 "Collect information about IndexSets") \ 2736 \ 2737 develop(bool, UseLoopSafepoints, true, \ 2738 "Generate Safepoint nodes in every loop") \ 2739 \ 2740 develop(intx, FastAllocateSizeLimit, 128*K, \ 2741 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2742 "Inline allocations larger than this in doublewords must go slow")\ 2743 \ 2744 product(bool, AggressiveOpts, false, \ 2745 "Enable aggressive optimizations - see arguments.cpp") \ 2746 \ 2747 product_pd(bool, CompactStrings, \ 2748 "Enable Strings to use single byte chars in backing store") \ 2749 \ 2750 product_pd(uintx, TypeProfileLevel, \ 2751 "=XYZ, with Z: Type profiling of arguments at call; " \ 2752 "Y: Type profiling of return value at call; " \ 2753 "X: Type profiling of parameters to methods; " \ 2754 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2755 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 2756 \ 2757 product(intx, TypeProfileArgsLimit, 2, \ 2758 "max number of call arguments to consider for type profiling") \ 2759 range(0, 16) \ 2760 \ 2761 product(intx, TypeProfileParmsLimit, 2, \ 2762 "max number of incoming parameters to consider for type profiling"\ 2763 ", -1 for all") \ 2764 range(-1, 64) \ 2765 \ 2766 /* statistics */ \ 2767 develop(bool, CountCompiledCalls, false, \ 2768 "Count method invocations") \ 2769 \ 2770 notproduct(bool, CountRuntimeCalls, false, \ 2771 "Count VM runtime calls") \ 2772 \ 2773 develop(bool, CountJNICalls, false, \ 2774 "Count jni method invocations") \ 2775 \ 2776 notproduct(bool, CountJVMCalls, false, \ 2777 "Count jvm method invocations") \ 2778 \ 2779 notproduct(bool, CountRemovableExceptions, false, \ 2780 "Count exceptions that could be replaced by branches due to " \ 2781 "inlining") \ 2782 \ 2783 notproduct(bool, ICMissHistogram, false, \ 2784 "Produce histogram of IC misses") \ 2785 \ 2786 /* interpreter */ \ 2787 product_pd(bool, RewriteBytecodes, \ 2788 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2789 \ 2790 product_pd(bool, RewriteFrequentPairs, \ 2791 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2792 \ 2793 diagnostic(bool, PrintInterpreter, false, \ 2794 "Print the generated interpreter code") \ 2795 \ 2796 product(bool, UseInterpreter, true, \ 2797 "Use interpreter for non-compiled methods") \ 2798 \ 2799 develop(bool, UseFastSignatureHandlers, true, \ 2800 "Use fast signature handlers for native calls") \ 2801 \ 2802 product(bool, UseLoopCounter, true, \ 2803 "Increment invocation counter on backward branch") \ 2804 \ 2805 product_pd(bool, UseOnStackReplacement, \ 2806 "Use on stack replacement, calls runtime if invoc. counter " \ 2807 "overflows in loop") \ 2808 \ 2809 notproduct(bool, TraceOnStackReplacement, false, \ 2810 "Trace on stack replacement") \ 2811 \ 2812 product_pd(bool, PreferInterpreterNativeStubs, \ 2813 "Use always interpreter stubs for native methods invoked via " \ 2814 "interpreter") \ 2815 \ 2816 develop(bool, CountBytecodes, false, \ 2817 "Count number of bytecodes executed") \ 2818 \ 2819 develop(bool, PrintBytecodeHistogram, false, \ 2820 "Print histogram of the executed bytecodes") \ 2821 \ 2822 develop(bool, PrintBytecodePairHistogram, false, \ 2823 "Print histogram of the executed bytecode pairs") \ 2824 \ 2825 diagnostic(bool, PrintSignatureHandlers, false, \ 2826 "Print code generated for native method signature handlers") \ 2827 \ 2828 develop(bool, VerifyOops, false, \ 2829 "Do plausibility checks for oops") \ 2830 \ 2831 develop(bool, CheckUnhandledOops, false, \ 2832 "Check for unhandled oops in VM code") \ 2833 \ 2834 develop(bool, VerifyJNIFields, trueInDebug, \ 2835 "Verify jfieldIDs for instance fields") \ 2836 \ 2837 notproduct(bool, VerifyJNIEnvThread, false, \ 2838 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2839 "from JNI") \ 2840 \ 2841 develop(bool, VerifyFPU, false, \ 2842 "Verify FPU state (check for NaN's, etc.)") \ 2843 \ 2844 develop(bool, VerifyThread, false, \ 2845 "Watch the thread register for corruption (SPARC only)") \ 2846 \ 2847 develop(bool, VerifyActivationFrameSize, false, \ 2848 "Verify that activation frame didn't become smaller than its " \ 2849 "minimal size") \ 2850 \ 2851 develop(bool, TraceFrequencyInlining, false, \ 2852 "Trace frequency based inlining") \ 2853 \ 2854 develop_pd(bool, InlineIntrinsics, \ 2855 "Inline intrinsics that can be statically resolved") \ 2856 \ 2857 product_pd(bool, ProfileInterpreter, \ 2858 "Profile at the bytecode level during interpretation") \ 2859 \ 2860 develop(bool, TraceProfileInterpreter, false, \ 2861 "Trace profiling at the bytecode level during interpretation. " \ 2862 "This outputs the profiling information collected to improve " \ 2863 "jit compilation.") \ 2864 \ 2865 develop_pd(bool, ProfileTraps, \ 2866 "Profile deoptimization traps at the bytecode level") \ 2867 \ 2868 product(intx, ProfileMaturityPercentage, 20, \ 2869 "number of method invocations/branches (expressed as % of " \ 2870 "CompileThreshold) before using the method's profile") \ 2871 range(0, 100) \ 2872 \ 2873 diagnostic(bool, PrintMethodData, false, \ 2874 "Print the results of +ProfileInterpreter at end of run") \ 2875 \ 2876 develop(bool, VerifyDataPointer, trueInDebug, \ 2877 "Verify the method data pointer during interpreter profiling") \ 2878 \ 2879 develop(bool, VerifyCompiledCode, false, \ 2880 "Include miscellaneous runtime verifications in nmethod code; " \ 2881 "default off because it disturbs nmethod size heuristics") \ 2882 \ 2883 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2884 "Manually make GC thread crash then dump java stack trace; " \ 2885 "Test only") \ 2886 \ 2887 /* compilation */ \ 2888 product(bool, UseCompiler, true, \ 2889 "Use Just-In-Time compilation") \ 2890 \ 2891 develop(bool, TraceCompilationPolicy, false, \ 2892 "Trace compilation policy") \ 2893 \ 2894 develop(bool, TimeCompilationPolicy, false, \ 2895 "Time the compilation policy") \ 2896 \ 2897 product(bool, UseCounterDecay, true, \ 2898 "Adjust recompilation counters") \ 2899 \ 2900 develop(intx, CounterHalfLifeTime, 30, \ 2901 "Half-life time of invocation counters (in seconds)") \ 2902 \ 2903 develop(intx, CounterDecayMinIntervalLength, 500, \ 2904 "The minimum interval (in milliseconds) between invocation of " \ 2905 "CounterDecay") \ 2906 \ 2907 product(bool, AlwaysCompileLoopMethods, false, \ 2908 "When using recompilation, never interpret methods " \ 2909 "containing loops") \ 2910 \ 2911 product(bool, DontCompileHugeMethods, true, \ 2912 "Do not compile methods > HugeMethodLimit") \ 2913 \ 2914 /* Bytecode escape analysis estimation. */ \ 2915 product(bool, EstimateArgEscape, true, \ 2916 "Analyze bytecodes to estimate escape state of arguments") \ 2917 \ 2918 product(intx, BCEATraceLevel, 0, \ 2919 "How much tracing to do of bytecode escape analysis estimates " \ 2920 "(0-3)") \ 2921 range(0, 3) \ 2922 \ 2923 product(intx, MaxBCEAEstimateLevel, 5, \ 2924 "Maximum number of nested calls that are analyzed by BC EA") \ 2925 range(0, max_jint) \ 2926 \ 2927 product(intx, MaxBCEAEstimateSize, 150, \ 2928 "Maximum bytecode size of a method to be analyzed by BC EA") \ 2929 range(0, max_jint) \ 2930 \ 2931 product(intx, AllocatePrefetchStyle, 1, \ 2932 "0 = no prefetch, " \ 2933 "1 = generate prefetch instructions for each allocation, " \ 2934 "2 = use TLAB watermark to gate allocation prefetch, " \ 2935 "3 = generate one prefetch instruction per cache line") \ 2936 range(0, 3) \ 2937 \ 2938 product(intx, AllocatePrefetchDistance, -1, \ 2939 "Distance to prefetch ahead of allocation pointer. " \ 2940 "-1: use system-specific value (automatically determined") \ 2941 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 2942 \ 2943 product(intx, AllocatePrefetchLines, 3, \ 2944 "Number of lines to prefetch ahead of array allocation pointer") \ 2945 range(1, 64) \ 2946 \ 2947 product(intx, AllocateInstancePrefetchLines, 1, \ 2948 "Number of lines to prefetch ahead of instance allocation " \ 2949 "pointer") \ 2950 range(1, 64) \ 2951 \ 2952 product(intx, AllocatePrefetchStepSize, 16, \ 2953 "Step size in bytes of sequential prefetch instructions") \ 2954 range(1, 512) \ 2955 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 2956 \ 2957 product(intx, AllocatePrefetchInstr, 0, \ 2958 "Select instruction to prefetch ahead of allocation pointer") \ 2959 constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit) \ 2960 \ 2961 /* deoptimization */ \ 2962 develop(bool, TraceDeoptimization, false, \ 2963 "Trace deoptimization") \ 2964 \ 2965 develop(bool, PrintDeoptimizationDetails, false, \ 2966 "Print more information about deoptimization") \ 2967 \ 2968 develop(bool, DebugDeoptimization, false, \ 2969 "Tracing various information while debugging deoptimization") \ 2970 \ 2971 product(intx, SelfDestructTimer, 0, \ 2972 "Will cause VM to terminate after a given time (in minutes) " \ 2973 "(0 means off)") \ 2974 range(0, max_intx) \ 2975 \ 2976 product(intx, MaxJavaStackTraceDepth, 1024, \ 2977 "The maximum number of lines in the stack trace for Java " \ 2978 "exceptions (0 means all)") \ 2979 range(0, max_jint/2) \ 2980 \ 2981 develop(bool, TraceStackWalk, false, \ 2982 "Trace stack walking") \ 2983 \ 2984 /* notice: the max range value here is max_jint, not max_intx */ \ 2985 /* because of overflow issue */ \ 2986 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2987 "Guarantee a safepoint (at least) every so many milliseconds " \ 2988 "(0 means none)")) \ 2989 NOT_EMBEDDED(range(0, max_jint)) \ 2990 \ 2991 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2992 "Guarantee a safepoint (at least) every so many milliseconds " \ 2993 "(0 means none)")) \ 2994 EMBEDDED_ONLY(range(0, max_jint)) \ 2995 \ 2996 product(intx, SafepointTimeoutDelay, 10000, \ 2997 "Delay in milliseconds for option SafepointTimeout") \ 2998 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 2999 NOT_LP64(range(0, max_intx)) \ 3000 \ 3001 product(intx, NmethodSweepActivity, 10, \ 3002 "Removes cold nmethods from code cache if > 0. Higher values " \ 3003 "result in more aggressive sweeping") \ 3004 range(0, 2000) \ 3005 \ 3006 notproduct(bool, LogSweeper, false, \ 3007 "Keep a ring buffer of sweeper activity") \ 3008 \ 3009 notproduct(intx, SweeperLogEntries, 1024, \ 3010 "Number of records in the ring buffer of sweeper activity") \ 3011 \ 3012 notproduct(intx, MemProfilingInterval, 500, \ 3013 "Time between each invocation of the MemProfiler") \ 3014 \ 3015 develop(intx, MallocCatchPtr, -1, \ 3016 "Hit breakpoint when mallocing/freeing this pointer") \ 3017 \ 3018 notproduct(ccstrlist, SuppressErrorAt, "", \ 3019 "List of assertions (file:line) to muzzle") \ 3020 \ 3021 develop(intx, StackPrintLimit, 100, \ 3022 "number of stack frames to print in VM-level stack dump") \ 3023 \ 3024 notproduct(intx, MaxElementPrintSize, 256, \ 3025 "maximum number of elements to print") \ 3026 \ 3027 notproduct(intx, MaxSubklassPrintSize, 4, \ 3028 "maximum number of subklasses to print when printing klass") \ 3029 \ 3030 product(intx, MaxInlineLevel, 9, \ 3031 "maximum number of nested calls that are inlined") \ 3032 range(0, max_jint) \ 3033 \ 3034 product(intx, MaxRecursiveInlineLevel, 1, \ 3035 "maximum number of nested recursive calls that are inlined") \ 3036 range(0, max_jint) \ 3037 \ 3038 develop(intx, MaxForceInlineLevel, 100, \ 3039 "maximum number of nested calls that are forced for inlining " \ 3040 "(using CompileCommand or marked w/ @ForceInline)") \ 3041 range(0, max_jint) \ 3042 \ 3043 product_pd(intx, InlineSmallCode, \ 3044 "Only inline already compiled methods if their code size is " \ 3045 "less than this") \ 3046 range(0, max_jint) \ 3047 \ 3048 product(intx, MaxInlineSize, 35, \ 3049 "The maximum bytecode size of a method to be inlined") \ 3050 range(0, max_jint) \ 3051 \ 3052 product_pd(intx, FreqInlineSize, \ 3053 "The maximum bytecode size of a frequent method to be inlined") \ 3054 range(0, max_jint) \ 3055 \ 3056 product(intx, MaxTrivialSize, 6, \ 3057 "The maximum bytecode size of a trivial method to be inlined") \ 3058 range(0, max_jint) \ 3059 \ 3060 product(intx, MinInliningThreshold, 250, \ 3061 "The minimum invocation count a method needs to have to be " \ 3062 "inlined") \ 3063 range(0, max_jint) \ 3064 \ 3065 develop(intx, MethodHistogramCutoff, 100, \ 3066 "The cutoff value for method invocation histogram (+CountCalls)") \ 3067 \ 3068 diagnostic(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3069 "Number of interpreted methods to show in profile") \ 3070 \ 3071 diagnostic(intx, ProfilerNumberOfCompiledMethods, 25, \ 3072 "Number of compiled methods to show in profile") \ 3073 \ 3074 diagnostic(intx, ProfilerNumberOfStubMethods, 25, \ 3075 "Number of stub methods to show in profile") \ 3076 \ 3077 diagnostic(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3078 "Number of runtime stub nodes to show in profile") \ 3079 \ 3080 product(intx, ProfileIntervalsTicks, 100, \ 3081 "Number of ticks between printing of interval profile " \ 3082 "(+ProfileIntervals)") \ 3083 range(0, max_intx) \ 3084 \ 3085 notproduct(intx, ScavengeALotInterval, 1, \ 3086 "Interval between which scavenge will occur with +ScavengeALot") \ 3087 \ 3088 notproduct(intx, FullGCALotInterval, 1, \ 3089 "Interval between which full gc will occur with +FullGCALot") \ 3090 \ 3091 notproduct(intx, FullGCALotStart, 0, \ 3092 "For which invocation to start FullGCAlot") \ 3093 \ 3094 notproduct(intx, FullGCALotDummies, 32*K, \ 3095 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3096 "to move") \ 3097 \ 3098 develop(intx, DontYieldALotInterval, 10, \ 3099 "Interval between which yields will be dropped (milliseconds)") \ 3100 \ 3101 develop(intx, MinSleepInterval, 1, \ 3102 "Minimum sleep() interval (milliseconds) when " \ 3103 "ConvertSleepToYield is off (used for Solaris)") \ 3104 \ 3105 develop(intx, ProfilerPCTickThreshold, 15, \ 3106 "Number of ticks in a PC buckets to be a hotspot") \ 3107 \ 3108 notproduct(intx, DeoptimizeALotInterval, 5, \ 3109 "Number of exits until DeoptimizeALot kicks in") \ 3110 \ 3111 notproduct(intx, ZombieALotInterval, 5, \ 3112 "Number of exits until ZombieALot kicks in") \ 3113 \ 3114 diagnostic(intx, MallocVerifyInterval, 0, \ 3115 "If non-zero, verify C heap after every N calls to " \ 3116 "malloc/realloc/free") \ 3117 range(0, max_intx) \ 3118 \ 3119 diagnostic(intx, MallocVerifyStart, 0, \ 3120 "If non-zero, start verifying C heap after Nth call to " \ 3121 "malloc/realloc/free") \ 3122 range(0, max_intx) \ 3123 \ 3124 diagnostic(uintx, MallocMaxTestWords, 0, \ 3125 "If non-zero, maximum number of words that malloc/realloc can " \ 3126 "allocate (for testing only)") \ 3127 range(0, max_uintx) \ 3128 \ 3129 product(intx, TypeProfileWidth, 2, \ 3130 "Number of receiver types to record in call/cast profile") \ 3131 range(0, 8) \ 3132 \ 3133 experimental(intx, MethodProfileWidth, 0, \ 3134 "Number of methods to record in call profile") \ 3135 \ 3136 develop(intx, BciProfileWidth, 2, \ 3137 "Number of return bci's to record in ret profile") \ 3138 \ 3139 product(intx, PerMethodRecompilationCutoff, 400, \ 3140 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3141 range(-1, max_intx) \ 3142 \ 3143 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3144 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3145 range(-1, max_intx) \ 3146 \ 3147 product(intx, PerMethodTrapLimit, 100, \ 3148 "Limit on traps (of one kind) in a method (includes inlines)") \ 3149 range(0, max_jint) \ 3150 \ 3151 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3152 "Limit on speculative traps (of one kind) in a method " \ 3153 "(includes inlines)") \ 3154 range(0, max_jint) \ 3155 \ 3156 product(intx, PerBytecodeTrapLimit, 4, \ 3157 "Limit on traps (of one kind) at a particular BCI") \ 3158 range(0, max_jint) \ 3159 \ 3160 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3161 "Extra method data trap entries for speculation") \ 3162 \ 3163 develop(intx, InlineFrequencyRatio, 20, \ 3164 "Ratio of call site execution to caller method invocation") \ 3165 range(0, max_jint) \ 3166 \ 3167 diagnostic_pd(intx, InlineFrequencyCount, \ 3168 "Count of call site execution necessary to trigger frequent " \ 3169 "inlining") \ 3170 range(0, max_jint) \ 3171 \ 3172 develop(intx, InlineThrowCount, 50, \ 3173 "Force inlining of interpreted methods that throw this often") \ 3174 range(0, max_jint) \ 3175 \ 3176 develop(intx, InlineThrowMaxSize, 200, \ 3177 "Force inlining of throwing methods smaller than this") \ 3178 range(0, max_jint) \ 3179 \ 3180 develop(intx, ProfilerNodeSize, 1024, \ 3181 "Size in K to allocate for the Profile Nodes of each thread") \ 3182 range(0, 1024) \ 3183 \ 3184 /* gc parameters */ \ 3185 product(size_t, InitialHeapSize, 0, \ 3186 "Initial heap size (in bytes); zero means use ergonomics") \ 3187 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \ 3188 \ 3189 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3190 "Maximum heap size (in bytes)") \ 3191 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \ 3192 \ 3193 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3194 "Initial tenured generation size (in bytes)") \ 3195 range(0, max_uintx) \ 3196 \ 3197 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3198 "Initial new generation size (in bytes)") \ 3199 constraint(NewSizeConstraintFunc,AfterErgo) \ 3200 \ 3201 product(size_t, MaxNewSize, max_uintx, \ 3202 "Maximum new generation size (in bytes), max_uintx means set " \ 3203 "ergonomically") \ 3204 range(0, max_uintx) \ 3205 \ 3206 product_pd(size_t, HeapBaseMinAddress, \ 3207 "OS specific low limit for heap base address") \ 3208 constraint(HeapBaseMinAddressConstraintFunc,AfterErgo) \ 3209 \ 3210 product(size_t, PretenureSizeThreshold, 0, \ 3211 "Maximum size in bytes of objects allocated in DefNew " \ 3212 "generation; zero means no maximum") \ 3213 range(0, max_uintx) \ 3214 \ 3215 product(size_t, MinTLABSize, 2*K, \ 3216 "Minimum allowed TLAB size (in bytes)") \ 3217 range(1, max_uintx/2) \ 3218 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \ 3219 \ 3220 product(size_t, TLABSize, 0, \ 3221 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3222 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \ 3223 \ 3224 product(size_t, YoungPLABSize, 4096, \ 3225 "Size of young gen promotion LAB's (in HeapWords)") \ 3226 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \ 3227 \ 3228 product(size_t, OldPLABSize, 1024, \ 3229 "Size of old gen promotion LAB's (in HeapWords), or Number " \ 3230 "of blocks to attempt to claim when refilling CMS LAB's") \ 3231 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \ 3232 \ 3233 product(uintx, TLABAllocationWeight, 35, \ 3234 "Allocation averaging weight") \ 3235 range(0, 100) \ 3236 \ 3237 /* Limit the lower bound of this flag to 1 as it is used */ \ 3238 /* in a division expression. */ \ 3239 product(uintx, TLABWasteTargetPercent, 1, \ 3240 "Percentage of Eden that can be wasted") \ 3241 range(1, 100) \ 3242 \ 3243 product(uintx, TLABRefillWasteFraction, 64, \ 3244 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3245 range(1, max_juint) \ 3246 \ 3247 product(uintx, TLABWasteIncrement, 4, \ 3248 "Increment allowed waste at slow allocation") \ 3249 range(0, max_jint) \ 3250 constraint(TLABWasteIncrementConstraintFunc,AfterMemoryInit) \ 3251 \ 3252 product(uintx, SurvivorRatio, 8, \ 3253 "Ratio of eden/survivor space size") \ 3254 range(1, max_uintx-2) \ 3255 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \ 3256 \ 3257 product(uintx, NewRatio, 2, \ 3258 "Ratio of old/new generation sizes") \ 3259 range(0, max_uintx-1) \ 3260 \ 3261 product_pd(size_t, NewSizeThreadIncrease, \ 3262 "Additional size added to desired new generation size per " \ 3263 "non-daemon thread (in bytes)") \ 3264 range(0, max_uintx) \ 3265 \ 3266 product_pd(size_t, MetaspaceSize, \ 3267 "Initial threshold (in bytes) at which a garbage collection " \ 3268 "is done to reduce Metaspace usage") \ 3269 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 3270 \ 3271 product(size_t, MaxMetaspaceSize, max_uintx, \ 3272 "Maximum size of Metaspaces (in bytes)") \ 3273 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 3274 \ 3275 product(size_t, CompressedClassSpaceSize, 1*G, \ 3276 "Maximum size of class area in Metaspace when compressed " \ 3277 "class pointers are used") \ 3278 range(1*M, 3*G) \ 3279 \ 3280 manageable(uintx, MinHeapFreeRatio, 40, \ 3281 "The minimum percentage of heap free after GC to avoid expansion."\ 3282 " For most GCs this applies to the old generation. In G1 and" \ 3283 " ParallelGC it applies to the whole heap.") \ 3284 range(0, 100) \ 3285 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 3286 \ 3287 manageable(uintx, MaxHeapFreeRatio, 70, \ 3288 "The maximum percentage of heap free after GC to avoid shrinking."\ 3289 " For most GCs this applies to the old generation. In G1 and" \ 3290 " ParallelGC it applies to the whole heap.") \ 3291 range(0, 100) \ 3292 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 3293 \ 3294 product(bool, ShrinkHeapInSteps, true, \ 3295 "When disabled, informs the GC to shrink the java heap directly" \ 3296 " to the target size at the next full GC rather than requiring" \ 3297 " smaller steps during multiple full GCs.") \ 3298 \ 3299 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3300 "Number of milliseconds per MB of free space in the heap") \ 3301 range(0, max_intx) \ 3302 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 3303 \ 3304 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3305 "The minimum change in heap space due to GC (in bytes)") \ 3306 range(0, max_uintx) \ 3307 \ 3308 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3309 "The minimum expansion of Metaspace (in bytes)") \ 3310 range(0, max_uintx) \ 3311 \ 3312 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3313 "The maximum percentage of Metaspace free after GC to avoid " \ 3314 "shrinking") \ 3315 range(0, 100) \ 3316 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3317 \ 3318 product(uintx, MinMetaspaceFreeRatio, 40, \ 3319 "The minimum percentage of Metaspace free after GC to avoid " \ 3320 "expansion") \ 3321 range(0, 99) \ 3322 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3323 \ 3324 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3325 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3326 range(0, max_uintx) \ 3327 \ 3328 product(uintx, QueuedAllocationWarningCount, 0, \ 3329 "Number of times an allocation that queues behind a GC " \ 3330 "will retry before printing a warning") \ 3331 range(0, max_uintx) \ 3332 \ 3333 diagnostic(uintx, VerifyGCStartAt, 0, \ 3334 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3335 range(0, max_uintx) \ 3336 \ 3337 diagnostic(intx, VerifyGCLevel, 0, \ 3338 "Generation level at which to start +VerifyBefore/AfterGC") \ 3339 range(0, 1) \ 3340 \ 3341 product(uintx, MaxTenuringThreshold, 15, \ 3342 "Maximum value for tenuring threshold") \ 3343 range(0, markOopDesc::max_age + 1) \ 3344 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \ 3345 \ 3346 product(uintx, InitialTenuringThreshold, 7, \ 3347 "Initial value for tenuring threshold") \ 3348 range(0, markOopDesc::max_age + 1) \ 3349 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \ 3350 \ 3351 product(uintx, TargetSurvivorRatio, 50, \ 3352 "Desired percentage of survivor space used after scavenge") \ 3353 range(0, 100) \ 3354 \ 3355 product(uintx, MarkSweepDeadRatio, 5, \ 3356 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3357 "Serial mark sweep treats this as both the minimum and maximum " \ 3358 "value. " \ 3359 "CMS uses this value only if it falls back to mark sweep. " \ 3360 "Par compact uses a variable scale based on the density of the " \ 3361 "generation and treats this as the maximum value when the heap " \ 3362 "is either completely full or completely empty. Par compact " \ 3363 "also has a smaller default value; see arguments.cpp.") \ 3364 range(0, 100) \ 3365 \ 3366 product(uint, MarkSweepAlwaysCompactCount, 4, \ 3367 "How often should we fully compact the heap (ignoring the dead " \ 3368 "space parameters)") \ 3369 range(1, max_juint) \ 3370 \ 3371 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3372 "Delay between expansion and allocation (in milliseconds)") \ 3373 \ 3374 develop(uintx, GCWorkerDelayMillis, 0, \ 3375 "Delay in scheduling GC workers (in milliseconds)") \ 3376 \ 3377 product(intx, DeferThrSuspendLoopCount, 4000, \ 3378 "(Unstable) Number of times to iterate in safepoint loop " \ 3379 "before blocking VM threads ") \ 3380 range(-1, max_jint-1) \ 3381 \ 3382 product(intx, DeferPollingPageLoopCount, -1, \ 3383 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3384 "before changing safepoint polling page to RO ") \ 3385 range(-1, max_jint-1) \ 3386 \ 3387 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3388 range(0, max_intx) \ 3389 \ 3390 product(bool, PSChunkLargeArrays, true, \ 3391 "Process large arrays in chunks") \ 3392 \ 3393 product(uintx, GCDrainStackTargetSize, 64, \ 3394 "Number of entries we will try to leave on the stack " \ 3395 "during parallel gc") \ 3396 range(0, max_juint) \ 3397 \ 3398 /* stack parameters */ \ 3399 product_pd(intx, StackYellowPages, \ 3400 "Number of yellow zone (recoverable overflows) pages of size " \ 3401 "4KB. If pages are bigger yellow zone is aligned up.") \ 3402 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 3403 \ 3404 product_pd(intx, StackRedPages, \ 3405 "Number of red zone (unrecoverable overflows) pages of size " \ 3406 "4KB. If pages are bigger red zone is aligned up.") \ 3407 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 3408 \ 3409 product_pd(intx, StackReservedPages, \ 3410 "Number of reserved zone (reserved to annotated methods) pages" \ 3411 " of size 4KB. If pages are bigger reserved zone is aligned up.") \ 3412 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ 3413 \ 3414 product(bool, RestrictReservedStack, true, \ 3415 "Restrict @ReservedStackAccess to trusted classes") \ 3416 \ 3417 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3418 product_pd(intx, StackShadowPages, \ 3419 "Number of shadow zone (for overflow checking) pages of size " \ 3420 "4KB. If pages are bigger shadow zone is aligned up. " \ 3421 "This should exceed the depth of the VM and native call stack.") \ 3422 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 3423 \ 3424 product_pd(intx, ThreadStackSize, \ 3425 "Thread Stack Size (in Kbytes)") \ 3426 range(0, (max_intx-os::vm_page_size())/(1 * K)) \ 3427 \ 3428 product_pd(intx, VMThreadStackSize, \ 3429 "Non-Java Thread Stack Size (in Kbytes)") \ 3430 range(0, max_intx/(1 * K)) \ 3431 \ 3432 product_pd(intx, CompilerThreadStackSize, \ 3433 "Compiler Thread Stack Size (in Kbytes)") \ 3434 range(0, max_intx/(1 * K)) \ 3435 \ 3436 develop_pd(size_t, JVMInvokeMethodSlack, \ 3437 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3438 \ 3439 /* code cache parameters */ \ 3440 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3441 develop(uintx, CodeCacheSegmentSize, \ 3442 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)), \ 3443 "Code cache segment size (in bytes) - smallest unit of " \ 3444 "allocation") \ 3445 range(1, 1024) \ 3446 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 3447 \ 3448 develop_pd(intx, CodeEntryAlignment, \ 3449 "Code entry alignment for generated code (in bytes)") \ 3450 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 3451 \ 3452 product_pd(intx, OptoLoopAlignment, \ 3453 "Align inner loops to zero relative to this modulus") \ 3454 range(1, 16) \ 3455 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 3456 \ 3457 product_pd(uintx, InitialCodeCacheSize, \ 3458 "Initial code cache size (in bytes)") \ 3459 range(0, max_uintx) \ 3460 \ 3461 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3462 "Minimum code cache size (in bytes) required to start VM.") \ 3463 range(0, max_uintx) \ 3464 \ 3465 product(bool, SegmentedCodeCache, false, \ 3466 "Use a segmented code cache") \ 3467 \ 3468 product_pd(uintx, ReservedCodeCacheSize, \ 3469 "Reserved code cache size (in bytes) - maximum code cache size") \ 3470 range(0, max_uintx) \ 3471 \ 3472 product_pd(uintx, NonProfiledCodeHeapSize, \ 3473 "Size of code heap with non-profiled methods (in bytes)") \ 3474 range(0, max_uintx) \ 3475 \ 3476 product_pd(uintx, ProfiledCodeHeapSize, \ 3477 "Size of code heap with profiled methods (in bytes)") \ 3478 range(0, max_uintx) \ 3479 \ 3480 product_pd(uintx, NonNMethodCodeHeapSize, \ 3481 "Size of code heap with non-nmethods (in bytes)") \ 3482 range(0, max_uintx) \ 3483 \ 3484 product_pd(uintx, CodeCacheExpansionSize, \ 3485 "Code cache expansion size (in bytes)") \ 3486 range(0, max_uintx) \ 3487 \ 3488 develop_pd(uintx, CodeCacheMinBlockLength, \ 3489 "Minimum number of segments in a code cache block") \ 3490 range(1, 100) \ 3491 \ 3492 notproduct(bool, ExitOnFullCodeCache, false, \ 3493 "Exit the VM if we fill the code cache") \ 3494 \ 3495 product(bool, UseCodeCacheFlushing, true, \ 3496 "Remove cold/old nmethods from the code cache") \ 3497 \ 3498 product(uintx, StartAggressiveSweepingAt, 10, \ 3499 "Start aggressive sweeping if X[%] of the code cache is free." \ 3500 "Segmented code cache: X[%] of the non-profiled heap." \ 3501 "Non-segmented code cache: X[%] of the total code cache") \ 3502 range(0, 100) \ 3503 \ 3504 /* interpreter debugging */ \ 3505 develop(intx, BinarySwitchThreshold, 5, \ 3506 "Minimal number of lookupswitch entries for rewriting to binary " \ 3507 "switch") \ 3508 \ 3509 develop(intx, StopInterpreterAt, 0, \ 3510 "Stop interpreter execution at specified bytecode number") \ 3511 \ 3512 develop(intx, TraceBytecodesAt, 0, \ 3513 "Trace bytecodes starting with specified bytecode number") \ 3514 \ 3515 /* compiler interface */ \ 3516 develop(intx, CIStart, 0, \ 3517 "The id of the first compilation to permit") \ 3518 \ 3519 develop(intx, CIStop, max_jint, \ 3520 "The id of the last compilation to permit") \ 3521 \ 3522 develop(intx, CIStartOSR, 0, \ 3523 "The id of the first osr compilation to permit " \ 3524 "(CICountOSR must be on)") \ 3525 \ 3526 develop(intx, CIStopOSR, max_jint, \ 3527 "The id of the last osr compilation to permit " \ 3528 "(CICountOSR must be on)") \ 3529 \ 3530 develop(intx, CIBreakAtOSR, -1, \ 3531 "The id of osr compilation to break at") \ 3532 \ 3533 develop(intx, CIBreakAt, -1, \ 3534 "The id of compilation to break at") \ 3535 \ 3536 product(ccstrlist, CompileOnly, "", \ 3537 "List of methods (pkg/class.name) to restrict compilation to") \ 3538 \ 3539 product(ccstr, CompileCommandFile, NULL, \ 3540 "Read compiler commands from this file [.hotspot_compiler]") \ 3541 \ 3542 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 3543 "Read compiler directives from this file") \ 3544 \ 3545 product(ccstrlist, CompileCommand, "", \ 3546 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3547 \ 3548 develop(bool, ReplayCompiles, false, \ 3549 "Enable replay of compilations from ReplayDataFile") \ 3550 \ 3551 product(ccstr, ReplayDataFile, NULL, \ 3552 "File containing compilation replay information" \ 3553 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3554 \ 3555 product(ccstr, InlineDataFile, NULL, \ 3556 "File containing inlining replay information" \ 3557 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3558 \ 3559 develop(intx, ReplaySuppressInitializers, 2, \ 3560 "Control handling of class initialization during replay: " \ 3561 "0 - don't do anything special; " \ 3562 "1 - treat all class initializers as empty; " \ 3563 "2 - treat class initializers for application classes as empty; " \ 3564 "3 - allow all class initializers to run during bootstrap but " \ 3565 " pretend they are empty after starting replay") \ 3566 range(0, 3) \ 3567 \ 3568 develop(bool, ReplayIgnoreInitErrors, false, \ 3569 "Ignore exceptions thrown during initialization for replay") \ 3570 \ 3571 product(bool, DumpReplayDataOnError, true, \ 3572 "Record replay data for crashing compiler threads") \ 3573 \ 3574 product(bool, CICompilerCountPerCPU, false, \ 3575 "1 compiler thread for log(N CPUs)") \ 3576 \ 3577 develop(intx, CIFireOOMAt, -1, \ 3578 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3579 "(non-negative value throws OOM after this many CI accesses " \ 3580 "in each compile)") \ 3581 notproduct(intx, CICrashAt, -1, \ 3582 "id of compilation to trigger assert in compiler thread for " \ 3583 "the purpose of testing, e.g. generation of replay data") \ 3584 notproduct(bool, CIObjectFactoryVerify, false, \ 3585 "enable potentially expensive verification in ciObjectFactory") \ 3586 \ 3587 /* Priorities */ \ 3588 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3589 \ 3590 product(intx, ThreadPriorityPolicy, 0, \ 3591 "0 : Normal. "\ 3592 " VM chooses priorities that are appropriate for normal "\ 3593 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3594 " to normal native priority. Java priorities below " \ 3595 " NORM_PRIORITY map to lower native priority values. On "\ 3596 " Windows applications are allowed to use higher native "\ 3597 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3598 " not use the highest possible native priority, "\ 3599 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3600 " system threads. On Linux thread priorities are ignored "\ 3601 " because the OS does not support static priority in "\ 3602 " SCHED_OTHER scheduling class which is the only choice for "\ 3603 " non-root, non-realtime applications. "\ 3604 "1 : Aggressive. "\ 3605 " Java thread priorities map over to the entire range of "\ 3606 " native thread priorities. Higher Java thread priorities map "\ 3607 " to higher native thread priorities. This policy should be "\ 3608 " used with care, as sometimes it can cause performance "\ 3609 " degradation in the application and/or the entire system. On "\ 3610 " Linux this policy requires root privilege.") \ 3611 range(0, 1) \ 3612 \ 3613 product(bool, ThreadPriorityVerbose, false, \ 3614 "Print priority changes") \ 3615 \ 3616 product(intx, CompilerThreadPriority, -1, \ 3617 "The native priority at which compiler threads should run " \ 3618 "(-1 means no change)") \ 3619 range(min_jint, max_jint) \ 3620 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 3621 \ 3622 product(intx, VMThreadPriority, -1, \ 3623 "The native priority at which the VM thread should run " \ 3624 "(-1 means no change)") \ 3625 range(-1, 127) \ 3626 \ 3627 product(bool, CompilerThreadHintNoPreempt, true, \ 3628 "(Solaris only) Give compiler threads an extra quanta") \ 3629 \ 3630 product(bool, VMThreadHintNoPreempt, false, \ 3631 "(Solaris only) Give VM thread an extra quanta") \ 3632 \ 3633 product(intx, JavaPriority1_To_OSPriority, -1, \ 3634 "Map Java priorities to OS priorities") \ 3635 range(-1, 127) \ 3636 \ 3637 product(intx, JavaPriority2_To_OSPriority, -1, \ 3638 "Map Java priorities to OS priorities") \ 3639 range(-1, 127) \ 3640 \ 3641 product(intx, JavaPriority3_To_OSPriority, -1, \ 3642 "Map Java priorities to OS priorities") \ 3643 range(-1, 127) \ 3644 \ 3645 product(intx, JavaPriority4_To_OSPriority, -1, \ 3646 "Map Java priorities to OS priorities") \ 3647 range(-1, 127) \ 3648 \ 3649 product(intx, JavaPriority5_To_OSPriority, -1, \ 3650 "Map Java priorities to OS priorities") \ 3651 range(-1, 127) \ 3652 \ 3653 product(intx, JavaPriority6_To_OSPriority, -1, \ 3654 "Map Java priorities to OS priorities") \ 3655 range(-1, 127) \ 3656 \ 3657 product(intx, JavaPriority7_To_OSPriority, -1, \ 3658 "Map Java priorities to OS priorities") \ 3659 range(-1, 127) \ 3660 \ 3661 product(intx, JavaPriority8_To_OSPriority, -1, \ 3662 "Map Java priorities to OS priorities") \ 3663 range(-1, 127) \ 3664 \ 3665 product(intx, JavaPriority9_To_OSPriority, -1, \ 3666 "Map Java priorities to OS priorities") \ 3667 range(-1, 127) \ 3668 \ 3669 product(intx, JavaPriority10_To_OSPriority,-1, \ 3670 "Map Java priorities to OS priorities") \ 3671 range(-1, 127) \ 3672 \ 3673 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3674 "Java thread priority 10 maps to critical scheduling priority") \ 3675 \ 3676 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3677 "Compiler thread(s) run at critical scheduling priority") \ 3678 \ 3679 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3680 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3681 \ 3682 /* compiler debugging */ \ 3683 notproduct(intx, CompileTheWorldStartAt, 1, \ 3684 "First class to consider when using +CompileTheWorld") \ 3685 \ 3686 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3687 "Last class to consider when using +CompileTheWorld") \ 3688 \ 3689 develop(intx, NewCodeParameter, 0, \ 3690 "Testing Only: Create a dedicated integer parameter before " \ 3691 "putback") \ 3692 \ 3693 /* new oopmap storage allocation */ \ 3694 develop(intx, MinOopMapAllocation, 8, \ 3695 "Minimum number of OopMap entries in an OopMapSet") \ 3696 \ 3697 /* Background Compilation */ \ 3698 develop(intx, LongCompileThreshold, 50, \ 3699 "Used with +TraceLongCompiles") \ 3700 \ 3701 /* recompilation */ \ 3702 product_pd(intx, CompileThreshold, \ 3703 "number of interpreted method invocations before (re-)compiling") \ 3704 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 3705 \ 3706 product(double, CompileThresholdScaling, 1.0, \ 3707 "Factor to control when first compilation happens " \ 3708 "(both with and without tiered compilation): " \ 3709 "values greater than 1.0 delay counter overflow, " \ 3710 "values between 0 and 1.0 rush counter overflow, " \ 3711 "value of 1.0 leaves compilation thresholds unchanged " \ 3712 "value of 0.0 is equivalent to -Xint. " \ 3713 "" \ 3714 "Flag can be set as per-method option. " \ 3715 "If a value is specified for a method, compilation thresholds " \ 3716 "for that method are scaled by both the value of the global flag "\ 3717 "and the value of the per-method flag.") \ 3718 range(0.0, DBL_MAX) \ 3719 \ 3720 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3721 "Interpreter (tier 0) invocation notification frequency") \ 3722 range(0, 30) \ 3723 \ 3724 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3725 "C1 without MDO (tier 2) invocation notification frequency") \ 3726 range(0, 30) \ 3727 \ 3728 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3729 "C1 with MDO profiling (tier 3) invocation notification " \ 3730 "frequency") \ 3731 range(0, 30) \ 3732 \ 3733 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3734 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3735 range(0, 30) \ 3736 \ 3737 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3738 "Interpreter (tier 0) invocation notification frequency") \ 3739 range(0, 30) \ 3740 \ 3741 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3742 "C1 without MDO (tier 2) invocation notification frequency") \ 3743 range(0, 30) \ 3744 \ 3745 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3746 "C1 with MDO profiling (tier 3) invocation notification " \ 3747 "frequency") \ 3748 range(0, 30) \ 3749 \ 3750 product(intx, Tier2CompileThreshold, 0, \ 3751 "threshold at which tier 2 compilation is invoked") \ 3752 range(0, max_jint) \ 3753 \ 3754 product(intx, Tier2BackEdgeThreshold, 0, \ 3755 "Back edge threshold at which tier 2 compilation is invoked") \ 3756 range(0, max_jint) \ 3757 \ 3758 product(intx, Tier3InvocationThreshold, 200, \ 3759 "Compile if number of method invocations crosses this " \ 3760 "threshold") \ 3761 range(0, max_jint) \ 3762 \ 3763 product(intx, Tier3MinInvocationThreshold, 100, \ 3764 "Minimum invocation to compile at tier 3") \ 3765 range(0, max_jint) \ 3766 \ 3767 product(intx, Tier3CompileThreshold, 2000, \ 3768 "Threshold at which tier 3 compilation is invoked (invocation " \ 3769 "minimum must be satisfied)") \ 3770 range(0, max_jint) \ 3771 \ 3772 product(intx, Tier3BackEdgeThreshold, 60000, \ 3773 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3774 range(0, max_jint) \ 3775 \ 3776 product(intx, Tier4InvocationThreshold, 5000, \ 3777 "Compile if number of method invocations crosses this " \ 3778 "threshold") \ 3779 range(0, max_jint) \ 3780 \ 3781 product(intx, Tier4MinInvocationThreshold, 600, \ 3782 "Minimum invocation to compile at tier 4") \ 3783 range(0, max_jint) \ 3784 \ 3785 product(intx, Tier4CompileThreshold, 15000, \ 3786 "Threshold at which tier 4 compilation is invoked (invocation " \ 3787 "minimum must be satisfied") \ 3788 range(0, max_jint) \ 3789 \ 3790 product(intx, Tier4BackEdgeThreshold, 40000, \ 3791 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3792 range(0, max_jint) \ 3793 \ 3794 product(intx, Tier3DelayOn, 5, \ 3795 "If C2 queue size grows over this amount per compiler thread " \ 3796 "stop compiling at tier 3 and start compiling at tier 2") \ 3797 range(0, max_jint) \ 3798 \ 3799 product(intx, Tier3DelayOff, 2, \ 3800 "If C2 queue size is less than this amount per compiler thread " \ 3801 "allow methods compiled at tier 2 transition to tier 3") \ 3802 range(0, max_jint) \ 3803 \ 3804 product(intx, Tier3LoadFeedback, 5, \ 3805 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3806 "reaches this amount per compiler thread") \ 3807 range(0, max_jint) \ 3808 \ 3809 product(intx, Tier4LoadFeedback, 3, \ 3810 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3811 "reaches this amount per compiler thread") \ 3812 range(0, max_jint) \ 3813 \ 3814 product(intx, TieredCompileTaskTimeout, 50, \ 3815 "Kill compile task if method was not used within " \ 3816 "given timeout in milliseconds") \ 3817 range(0, max_intx) \ 3818 \ 3819 product(intx, TieredStopAtLevel, 4, \ 3820 "Stop at given compilation level") \ 3821 range(0, 4) \ 3822 \ 3823 product(intx, Tier0ProfilingStartPercentage, 200, \ 3824 "Start profiling in interpreter if the counters exceed tier 3 " \ 3825 "thresholds by the specified percentage") \ 3826 range(0, max_jint) \ 3827 \ 3828 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3829 "Increase the compile threshold for C1 compilation if the code " \ 3830 "cache is filled by the specified percentage") \ 3831 range(0, 99) \ 3832 \ 3833 product(intx, TieredRateUpdateMinTime, 1, \ 3834 "Minimum rate sampling interval (in milliseconds)") \ 3835 range(0, max_intx) \ 3836 \ 3837 product(intx, TieredRateUpdateMaxTime, 25, \ 3838 "Maximum rate sampling interval (in milliseconds)") \ 3839 range(0, max_intx) \ 3840 \ 3841 product_pd(bool, TieredCompilation, \ 3842 "Enable tiered compilation") \ 3843 \ 3844 product(bool, PrintTieredEvents, false, \ 3845 "Print tiered events notifications") \ 3846 \ 3847 product_pd(intx, OnStackReplacePercentage, \ 3848 "NON_TIERED number of method invocations/branches (expressed as " \ 3849 "% of CompileThreshold) before (re-)compiling OSR code") \ 3850 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 3851 \ 3852 product(intx, InterpreterProfilePercentage, 33, \ 3853 "NON_TIERED number of method invocations/branches (expressed as " \ 3854 "% of CompileThreshold) before profiling in the interpreter") \ 3855 range(0, 100) \ 3856 \ 3857 develop(intx, MaxRecompilationSearchLength, 10, \ 3858 "The maximum number of frames to inspect when searching for " \ 3859 "recompilee") \ 3860 \ 3861 develop(intx, MaxInterpretedSearchLength, 3, \ 3862 "The maximum number of interpreted frames to skip when searching "\ 3863 "for recompilee") \ 3864 \ 3865 develop(intx, DesiredMethodLimit, 8000, \ 3866 "The desired maximum method size (in bytecodes) after inlining") \ 3867 \ 3868 develop(intx, HugeMethodLimit, 8000, \ 3869 "Don't compile methods larger than this if " \ 3870 "+DontCompileHugeMethods") \ 3871 \ 3872 /* New JDK 1.4 reflection implementation */ \ 3873 \ 3874 develop(intx, FastSuperclassLimit, 8, \ 3875 "Depth of hardwired instanceof accelerator array") \ 3876 \ 3877 /* Properties for Java libraries */ \ 3878 \ 3879 product(uint64_t, MaxDirectMemorySize, 0, \ 3880 "Maximum total size of NIO direct-buffer allocations") \ 3881 range(0, max_jlong) \ 3882 \ 3883 /* Flags used for temporary code during development */ \ 3884 \ 3885 diagnostic(bool, UseNewCode, false, \ 3886 "Testing Only: Use the new version while testing") \ 3887 \ 3888 diagnostic(bool, UseNewCode2, false, \ 3889 "Testing Only: Use the new version while testing") \ 3890 \ 3891 diagnostic(bool, UseNewCode3, false, \ 3892 "Testing Only: Use the new version while testing") \ 3893 \ 3894 /* flags for performance data collection */ \ 3895 \ 3896 product(bool, UsePerfData, falseInEmbedded, \ 3897 "Flag to disable jvmstat instrumentation for performance testing "\ 3898 "and problem isolation purposes") \ 3899 \ 3900 product(bool, PerfDataSaveToFile, false, \ 3901 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3902 \ 3903 product(ccstr, PerfDataSaveFile, NULL, \ 3904 "Save PerfData memory to the specified absolute pathname. " \ 3905 "The string %p in the file name (if present) " \ 3906 "will be replaced by pid") \ 3907 \ 3908 product(intx, PerfDataSamplingInterval, 50, \ 3909 "Data sampling interval (in milliseconds)") \ 3910 range(PeriodicTask::min_interval, max_jint) \ 3911 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 3912 \ 3913 develop(bool, PerfTraceDataCreation, false, \ 3914 "Trace creation of Performance Data Entries") \ 3915 \ 3916 develop(bool, PerfTraceMemOps, false, \ 3917 "Trace PerfMemory create/attach/detach calls") \ 3918 \ 3919 product(bool, PerfDisableSharedMem, false, \ 3920 "Store performance data in standard memory") \ 3921 \ 3922 product(intx, PerfDataMemorySize, 32*K, \ 3923 "Size of performance data memory region. Will be rounded " \ 3924 "up to a multiple of the native os page size.") \ 3925 range(128, 32*64*K) \ 3926 \ 3927 product(intx, PerfMaxStringConstLength, 1024, \ 3928 "Maximum PerfStringConstant string length before truncation") \ 3929 range(32, 32*K) \ 3930 \ 3931 product(bool, PerfAllowAtExitRegistration, false, \ 3932 "Allow registration of atexit() methods") \ 3933 \ 3934 product(bool, PerfBypassFileSystemCheck, false, \ 3935 "Bypass Win32 file system criteria checks (Windows Only)") \ 3936 \ 3937 product(intx, UnguardOnExecutionViolation, 0, \ 3938 "Unguard page and retry on no-execute fault (Win32 only) " \ 3939 "0=off, 1=conservative, 2=aggressive") \ 3940 range(0, 2) \ 3941 \ 3942 /* Serviceability Support */ \ 3943 \ 3944 product(bool, ManagementServer, false, \ 3945 "Create JMX Management Server") \ 3946 \ 3947 product(bool, DisableAttachMechanism, false, \ 3948 "Disable mechanism that allows tools to attach to this VM") \ 3949 \ 3950 product(bool, StartAttachListener, false, \ 3951 "Always start Attach Listener at VM startup") \ 3952 \ 3953 manageable(bool, PrintConcurrentLocks, false, \ 3954 "Print java.util.concurrent locks in thread dump") \ 3955 \ 3956 product(bool, TransmitErrorReport, false, \ 3957 "Enable error report transmission on erroneous termination") \ 3958 \ 3959 product(ccstr, ErrorReportServer, NULL, \ 3960 "Override built-in error report server address") \ 3961 \ 3962 /* Shared spaces */ \ 3963 \ 3964 product(bool, UseSharedSpaces, true, \ 3965 "Use shared spaces for metadata") \ 3966 \ 3967 product(bool, VerifySharedSpaces, false, \ 3968 "Verify shared spaces (false for default archive, true for " \ 3969 "archive specified by -XX:SharedArchiveFile)") \ 3970 \ 3971 product(bool, RequireSharedSpaces, false, \ 3972 "Require shared spaces for metadata") \ 3973 \ 3974 product(bool, DumpSharedSpaces, false, \ 3975 "Special mode: JVM reads a class list, loads classes, builds " \ 3976 "shared spaces, and dumps the shared spaces to a file to be " \ 3977 "used in future JVM runs") \ 3978 \ 3979 product(bool, PrintSharedSpaces, false, \ 3980 "Print usage of shared spaces") \ 3981 \ 3982 product(bool, PrintSharedArchiveAndExit, false, \ 3983 "Print shared archive file contents") \ 3984 \ 3985 product(bool, PrintSharedDictionary, false, \ 3986 "If PrintSharedArchiveAndExit is true, also print the shared " \ 3987 "dictionary") \ 3988 \ 3989 product(size_t, SharedReadWriteSize, DEFAULT_SHARED_READ_WRITE_SIZE, \ 3990 "Size of read-write space for metadata (in bytes)") \ 3991 range(MIN_SHARED_READ_WRITE_SIZE, MAX_SHARED_READ_WRITE_SIZE) \ 3992 constraint(SharedReadWriteSizeConstraintFunc,AfterErgo) \ 3993 \ 3994 product(size_t, SharedReadOnlySize, DEFAULT_SHARED_READ_ONLY_SIZE, \ 3995 "Size of read-only space for metadata (in bytes)") \ 3996 range(MIN_SHARED_READ_ONLY_SIZE, MAX_SHARED_READ_ONLY_SIZE) \ 3997 constraint(SharedReadOnlySizeConstraintFunc,AfterErgo) \ 3998 \ 3999 product(size_t, SharedMiscDataSize, DEFAULT_SHARED_MISC_DATA_SIZE, \ 4000 "Size of the shared miscellaneous data area (in bytes)") \ 4001 range(MIN_SHARED_MISC_DATA_SIZE, MAX_SHARED_MISC_DATA_SIZE) \ 4002 constraint(SharedMiscDataSizeConstraintFunc,AfterErgo) \ 4003 \ 4004 product(size_t, SharedMiscCodeSize, DEFAULT_SHARED_MISC_CODE_SIZE, \ 4005 "Size of the shared miscellaneous code area (in bytes)") \ 4006 range(MIN_SHARED_MISC_CODE_SIZE, MAX_SHARED_MISC_CODE_SIZE) \ 4007 constraint(SharedMiscCodeSizeConstraintFunc,AfterErgo) \ 4008 \ 4009 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 4010 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 4011 "Address to allocate shared memory region for class data") \ 4012 range(0, SIZE_MAX) \ 4013 \ 4014 product(uintx, SharedSymbolTableBucketSize, 4, \ 4015 "Average number of symbols per bucket in shared table") \ 4016 range(2, 246) \ 4017 \ 4018 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 4019 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 4020 "classes. Just exclude them from the shared dictionary.") \ 4021 \ 4022 diagnostic(bool, PrintMethodHandleStubs, false, \ 4023 "Print generated stub code for method handles") \ 4024 \ 4025 develop(bool, TraceMethodHandles, false, \ 4026 "trace internal method handle operations") \ 4027 \ 4028 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4029 "perform extra checks when constructing method handles") \ 4030 \ 4031 diagnostic(bool, ShowHiddenFrames, false, \ 4032 "show method handle implementation frames (usually hidden)") \ 4033 \ 4034 experimental(bool, TrustFinalNonStaticFields, false, \ 4035 "trust final non-static declarations for constant folding") \ 4036 \ 4037 diagnostic(bool, FoldStableValues, true, \ 4038 "Optimize loads from stable fields (marked w/ @Stable)") \ 4039 \ 4040 develop(bool, TraceInvokeDynamic, false, \ 4041 "trace internal invoke dynamic operations") \ 4042 \ 4043 diagnostic(bool, PauseAtStartup, false, \ 4044 "Causes the VM to pause at startup time and wait for the pause " \ 4045 "file to be removed (default: ./vm.paused.<pid>)") \ 4046 \ 4047 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4048 "The file to create and for whose removal to await when pausing " \ 4049 "at startup. (default: ./vm.paused.<pid>)") \ 4050 \ 4051 diagnostic(bool, PauseAtExit, false, \ 4052 "Pause and wait for keypress on exit if a debugger is attached") \ 4053 \ 4054 product(bool, ExtendedDTraceProbes, false, \ 4055 "Enable performance-impacting dtrace probes") \ 4056 \ 4057 product(bool, DTraceMethodProbes, false, \ 4058 "Enable dtrace probes for method-entry and method-exit") \ 4059 \ 4060 product(bool, DTraceAllocProbes, false, \ 4061 "Enable dtrace probes for object allocation") \ 4062 \ 4063 product(bool, DTraceMonitorProbes, false, \ 4064 "Enable dtrace probes for monitor events") \ 4065 \ 4066 product(bool, RelaxAccessControlCheck, false, \ 4067 "Relax the access control checks in the verifier") \ 4068 \ 4069 product(uintx, StringTableSize, defaultStringTableSize, \ 4070 "Number of buckets in the interned String table") \ 4071 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4072 \ 4073 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4074 "Number of buckets in the JVM internal Symbol table") \ 4075 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4076 \ 4077 product(bool, UseStringDeduplication, false, \ 4078 "Use string deduplication") \ 4079 \ 4080 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4081 "A string must reach this age (or be promoted to an old region) " \ 4082 "to be considered for deduplication") \ 4083 range(1, markOopDesc::max_age) \ 4084 \ 4085 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4086 "Force table resize every time the table is scanned") \ 4087 \ 4088 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4089 "Force table rehash every time the table is scanned") \ 4090 \ 4091 diagnostic(bool, WhiteBoxAPI, false, \ 4092 "Enable internal testing APIs") \ 4093 \ 4094 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4095 "Default survivor space alignment in bytes") \ 4096 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 4097 \ 4098 product(bool , AllowNonVirtualCalls, false, \ 4099 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4100 \ 4101 product(ccstr, DumpLoadedClassList, NULL, \ 4102 "Dump the names all loaded classes, that could be stored into " \ 4103 "the CDS archive, in the specified file") \ 4104 \ 4105 product(ccstr, SharedClassListFile, NULL, \ 4106 "Override the default CDS class list") \ 4107 \ 4108 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4109 "Override the default location of the CDS archive file") \ 4110 \ 4111 product(ccstr, ExtraSharedClassListFile, NULL, \ 4112 "Extra classlist for building the CDS archive file") \ 4113 \ 4114 experimental(size_t, ArrayAllocatorMallocLimit, \ 4115 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4116 "Allocation less than this value will be allocated " \ 4117 "using malloc. Larger allocations will use mmap.") \ 4118 \ 4119 experimental(bool, AlwaysAtomicAccesses, false, \ 4120 "Accesses to all variables should always be atomic") \ 4121 \ 4122 product(bool, EnableTracing, false, \ 4123 "Enable event-based tracing") \ 4124 \ 4125 product(bool, UseLockedTracing, false, \ 4126 "Use locked-tracing when doing event-based tracing") \ 4127 \ 4128 diagnostic(bool, UseUnalignedAccesses, false, \ 4129 "Use unaligned memory accesses in Unsafe") \ 4130 \ 4131 product_pd(bool, PreserveFramePointer, \ 4132 "Use the FP register for holding the frame pointer " \ 4133 "and not as a general purpose register.") \ 4134 \ 4135 diagnostic(bool, CheckIntrinsics, true, \ 4136 "When a class C is loaded, check that " \ 4137 "(1) all intrinsics defined by the VM for class C are present "\ 4138 "in the loaded class file and are marked with the " \ 4139 "@HotSpotIntrinsicCandidate annotation, that " \ 4140 "(2) there is an intrinsic registered for all loaded methods " \ 4141 "that are annotated with the @HotSpotIntrinsicCandidate " \ 4142 "annotation, and that " \ 4143 "(3) no orphan methods exist for class C (i.e., methods for " \ 4144 "which the VM declares an intrinsic but that are not declared "\ 4145 "in the loaded class C. " \ 4146 "Check (3) is available only in debug builds.") \ 4147 \ 4148 diagnostic_pd(intx, InitArrayShortSize, \ 4149 "Threshold small size (in bytes) for clearing arrays. " \ 4150 "Anything this size or smaller may get converted to discrete " \ 4151 "scalar stores.") \ 4152 range(0, max_intx) \ 4153 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ 4154 \ 4155 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 4156 "Disable backwards compatibility for compile commands.") \ 4157 \ 4158 diagnostic(bool, CompilerDirectivesPrint, false, \ 4159 "Print compiler directives on installation.") \ 4160 diagnostic(int, CompilerDirectivesLimit, 50, \ 4161 "Limit on number of compiler directives.") 4162 4163 4164/* 4165 * Macros for factoring of globals 4166 */ 4167 4168// Interface macros 4169#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4170#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4171#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4172#define DECLARE_PD_DIAGNOSTIC_FLAG(type, name, doc) extern "C" type name; 4173#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4174#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4175#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4176#ifdef PRODUCT 4177#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 4178#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 4179#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 4180#else 4181#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4182#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4183#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4184#endif // PRODUCT 4185// Special LP64 flags, product only needed for now. 4186#ifdef _LP64 4187#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4188#else 4189#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4190#endif // _LP64 4191 4192// Implementation macros 4193#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4194#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4195#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4196#define MATERIALIZE_PD_DIAGNOSTIC_FLAG(type, name, doc) type name = pd_##name; 4197#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4198#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4199#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4200#ifdef PRODUCT 4201#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 4202#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 4203#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 4204#else 4205#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4206#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4207#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4208#endif // PRODUCT 4209#ifdef _LP64 4210#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4211#else 4212#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4213#endif // _LP64 4214 4215// Only materialize src code for range checking when required, ignore otherwise 4216#define IGNORE_RANGE(a, b) 4217// Only materialize src code for contraint checking when required, ignore otherwise 4218#define IGNORE_CONSTRAINT(func,type) 4219 4220#define IGNORE_WRITEABLE(type) 4221 4222RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4223 DECLARE_PD_DEVELOPER_FLAG, \ 4224 DECLARE_PRODUCT_FLAG, \ 4225 DECLARE_PD_PRODUCT_FLAG, \ 4226 DECLARE_DIAGNOSTIC_FLAG, \ 4227 DECLARE_PD_DIAGNOSTIC_FLAG, \ 4228 DECLARE_EXPERIMENTAL_FLAG, \ 4229 DECLARE_NOTPRODUCT_FLAG, \ 4230 DECLARE_MANAGEABLE_FLAG, \ 4231 DECLARE_PRODUCT_RW_FLAG, \ 4232 DECLARE_LP64_PRODUCT_FLAG, \ 4233 IGNORE_RANGE, \ 4234 IGNORE_CONSTRAINT, \ 4235 IGNORE_WRITEABLE) 4236 4237RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4238 DECLARE_PD_DEVELOPER_FLAG, \ 4239 DECLARE_PRODUCT_FLAG, \ 4240 DECLARE_PD_PRODUCT_FLAG, \ 4241 DECLARE_DIAGNOSTIC_FLAG, \ 4242 DECLARE_PD_DIAGNOSTIC_FLAG, \ 4243 DECLARE_NOTPRODUCT_FLAG, \ 4244 IGNORE_RANGE, \ 4245 IGNORE_CONSTRAINT, \ 4246 IGNORE_WRITEABLE) 4247 4248ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4249 DECLARE_PRODUCT_FLAG, \ 4250 DECLARE_DIAGNOSTIC_FLAG, \ 4251 DECLARE_EXPERIMENTAL_FLAG, \ 4252 DECLARE_NOTPRODUCT_FLAG, \ 4253 IGNORE_RANGE, \ 4254 IGNORE_CONSTRAINT, \ 4255 IGNORE_WRITEABLE) 4256 4257// Extensions 4258 4259#include "runtime/globals_ext.hpp" 4260 4261#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4262