globals.hpp revision 11720:f8e096377840
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 // latest 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 // set this bit if the flag was set on the command line 264 ORIG_COMMAND_LINE = 1 << 19, 265 266 KIND_MASK = ~(VALUE_ORIGIN_MASK | ORIG_COMMAND_LINE) 267 }; 268 269 enum Error { 270 // no error 271 SUCCESS = 0, 272 // flag name is missing 273 MISSING_NAME, 274 // flag value is missing 275 MISSING_VALUE, 276 // error parsing the textual form of the value 277 WRONG_FORMAT, 278 // flag is not writable 279 NON_WRITABLE, 280 // flag value is outside of its bounds 281 OUT_OF_BOUNDS, 282 // flag value violates its constraint 283 VIOLATES_CONSTRAINT, 284 // there is no flag with the given name 285 INVALID_FLAG, 286 // the flag can only be set only on command line during invocation of the VM 287 COMMAND_LINE_ONLY, 288 // the flag may only be set once 289 SET_ONLY_ONCE, 290 // the flag is not writable in this combination of product/debug build 291 CONSTANT, 292 // other, unspecified error related to setting the flag 293 ERR_OTHER 294 }; 295 296 enum MsgType { 297 NONE = 0, 298 DIAGNOSTIC_FLAG_BUT_LOCKED, 299 EXPERIMENTAL_FLAG_BUT_LOCKED, 300 DEVELOPER_FLAG_BUT_PRODUCT_BUILD, 301 NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD 302 }; 303 304 const char* _type; 305 const char* _name; 306 void* _addr; 307 NOT_PRODUCT(const char* _doc;) 308 Flags _flags; 309 310 // points to all Flags static array 311 static Flag* flags; 312 313 // number of flags 314 static size_t numFlags; 315 316 static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); }; 317 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false); 318 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 319 320 static const char* get_int_default_range_str(); 321 static const char* get_uint_default_range_str(); 322 static const char* get_intx_default_range_str(); 323 static const char* get_uintx_default_range_str(); 324 static const char* get_uint64_t_default_range_str(); 325 static const char* get_size_t_default_range_str(); 326 static const char* get_double_default_range_str(); 327 328 Flag::Error check_writable(bool changed); 329 330 bool is_bool() const; 331 bool get_bool() const; 332 Flag::Error set_bool(bool value); 333 334 bool is_int() const; 335 int get_int() const; 336 Flag::Error set_int(int value); 337 338 bool is_uint() const; 339 uint get_uint() const; 340 Flag::Error set_uint(uint value); 341 342 bool is_intx() const; 343 intx get_intx() const; 344 Flag::Error set_intx(intx value); 345 346 bool is_uintx() const; 347 uintx get_uintx() const; 348 Flag::Error set_uintx(uintx value); 349 350 bool is_uint64_t() const; 351 uint64_t get_uint64_t() const; 352 Flag::Error set_uint64_t(uint64_t value); 353 354 bool is_size_t() const; 355 size_t get_size_t() const; 356 Flag::Error set_size_t(size_t value); 357 358 bool is_double() const; 359 double get_double() const; 360 Flag::Error set_double(double value); 361 362 bool is_ccstr() const; 363 bool ccstr_accumulates() const; 364 ccstr get_ccstr() const; 365 Flag::Error set_ccstr(ccstr value); 366 367 Flags get_origin(); 368 void set_origin(Flags origin); 369 370 bool is_default(); 371 bool is_ergonomic(); 372 bool is_command_line(); 373 void set_command_line(); 374 375 bool is_product() const; 376 bool is_manageable() const; 377 bool is_diagnostic() const; 378 bool is_experimental() const; 379 bool is_notproduct() const; 380 bool is_develop() const; 381 bool is_read_write() const; 382 bool is_commercial() const; 383 384 bool is_constant_in_binary() const; 385 386 bool is_unlocker() const; 387 bool is_unlocked() const; 388 bool is_writeable() const; 389 bool is_external() const; 390 391 bool is_unlocker_ext() const; 392 bool is_unlocked_ext() const; 393 bool is_writeable_ext() const; 394 bool is_external_ext() const; 395 396 void unlock_diagnostic(); 397 398 Flag::MsgType get_locked_message(char*, int) const; 399 void get_locked_message_ext(char*, int) const; 400 401 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 402 void print_on(outputStream* st, bool withComments = false, bool printRanges = false); 403 void print_kind_and_origin(outputStream* st); 404 void print_as_flag(outputStream* st); 405 406 static const char* flag_error_str(Flag::Error error); 407}; 408 409// debug flags control various aspects of the VM and are global accessible 410 411// use FlagSetting to temporarily change some debug flag 412// e.g. FlagSetting fs(DebugThisAndThat, true); 413// restored to previous value upon leaving scope 414class FlagSetting { 415 bool val; 416 bool* flag; 417 public: 418 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 419 ~FlagSetting() { *flag = val; } 420}; 421 422 423class CounterSetting { 424 intx* counter; 425 public: 426 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 427 ~CounterSetting() { (*counter)--; } 428}; 429 430class IntFlagSetting { 431 int val; 432 int* flag; 433 public: 434 IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; } 435 ~IntFlagSetting() { *flag = val; } 436}; 437 438class UIntFlagSetting { 439 uint val; 440 uint* flag; 441 public: 442 UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; } 443 ~UIntFlagSetting() { *flag = val; } 444}; 445 446class UIntXFlagSetting { 447 uintx val; 448 uintx* flag; 449 public: 450 UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 451 ~UIntXFlagSetting() { *flag = val; } 452}; 453 454class DoubleFlagSetting { 455 double val; 456 double* flag; 457 public: 458 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 459 ~DoubleFlagSetting() { *flag = val; } 460}; 461 462class SizeTFlagSetting { 463 size_t val; 464 size_t* flag; 465 public: 466 SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; } 467 ~SizeTFlagSetting() { *flag = val; } 468}; 469 470// Helper class for temporarily saving the value of a flag during a scope. 471template <size_t SIZE> 472class FlagGuard { 473 unsigned char _value[SIZE]; 474 void* const _addr; 475 476 // Hide operator new, this class should only be allocated on the stack. 477 // NOTE: Cannot include memory/allocation.hpp here due to circular 478 // dependencies. 479 void* operator new(size_t size) throw(); 480 void* operator new [](size_t size) throw(); 481 482 public: 483 FlagGuard(void* flag_addr) : _addr(flag_addr) { 484 memcpy(_value, _addr, SIZE); 485 } 486 487 ~FlagGuard() { 488 memcpy(_addr, _value, SIZE); 489 } 490}; 491 492#define FLAG_GUARD(f) FlagGuard<sizeof(f)> f ## _guard(&f) 493 494class CommandLineFlags { 495public: 496 static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false); 497 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); } 498 static Flag::Error boolAtPut(Flag* flag, bool* value, Flag::Flags origin); 499 static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin); 500 static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 501 502 static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false); 503 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); } 504 static Flag::Error intAtPut(Flag* flag, int* value, Flag::Flags origin); 505 static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin); 506 static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); } 507 508 static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false); 509 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); } 510 static Flag::Error uintAtPut(Flag* flag, uint* value, Flag::Flags origin); 511 static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin); 512 static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); } 513 514 static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false); 515 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); } 516 static Flag::Error intxAtPut(Flag* flag, intx* value, Flag::Flags origin); 517 static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin); 518 static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 519 520 static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false); 521 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); } 522 static Flag::Error uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin); 523 static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin); 524 static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 525 526 static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false); 527 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); } 528 static Flag::Error size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin); 529 static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin); 530 static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); } 531 532 static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false); 533 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); } 534 static Flag::Error uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin); 535 static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin); 536 static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 537 538 static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false); 539 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); } 540 static Flag::Error doubleAtPut(Flag* flag, double* value, Flag::Flags origin); 541 static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin); 542 static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 543 544 static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false); 545 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); } 546 // Contract: Flag will make private copy of the incoming value. 547 // Outgoing value is always malloc-ed, and caller MUST call free. 548 static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin); 549 static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 550 551 // Returns false if name is not a command line flag. 552 static bool wasSetOnCmdline(const char* name, bool* value); 553 static void printSetFlags(outputStream* out); 554 555 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 556 static void printFlags(outputStream* out, bool withComments, bool printRanges = false); 557 558 static void verify() PRODUCT_RETURN; 559}; 560 561// use this for flags that are true by default in the debug version but 562// false in the optimized version, and vice versa 563#ifdef ASSERT 564#define trueInDebug true 565#define falseInDebug false 566#else 567#define trueInDebug false 568#define falseInDebug true 569#endif 570 571// use this for flags that are true per default in the product build 572// but false in development builds, and vice versa 573#ifdef PRODUCT 574#define trueInProduct true 575#define falseInProduct false 576#else 577#define trueInProduct false 578#define falseInProduct true 579#endif 580 581#ifdef JAVASE_EMBEDDED 582#define falseInEmbedded false 583#else 584#define falseInEmbedded true 585#endif 586 587// develop flags are settable / visible only during development and are constant in the PRODUCT version 588// product flags are always settable / visible 589// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 590 591// A flag must be declared with one of the following types: 592// bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 593// The type "ccstr" is an alias for "const char*" and is used 594// only in this file, because the macrology requires single-token type names. 595 596// Note: Diagnostic options not meant for VM tuning or for product modes. 597// They are to be used for VM quality assurance or field diagnosis 598// of VM bugs. They are hidden so that users will not be encouraged to 599// try them as if they were VM ordinary execution options. However, they 600// are available in the product version of the VM. Under instruction 601// from support engineers, VM customers can turn them on to collect 602// diagnostic information about VM problems. To use a VM diagnostic 603// option, you must first specify +UnlockDiagnosticVMOptions. 604// (This master switch also affects the behavior of -Xprintflags.) 605// 606// experimental flags are in support of features that are not 607// part of the officially supported product, but are available 608// for experimenting with. They could, for example, be performance 609// features that may not have undergone full or rigorous QA, but which may 610// help performance in some cases and released for experimentation 611// by the community of users and developers. This flag also allows one to 612// be able to build a fully supported product that nonetheless also 613// ships with some unsupported, lightly tested, experimental features. 614// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 615// UnlockExperimentalVMOptions flag, which allows the control and 616// modification of the experimental flags. 617// 618// Nota bene: neither diagnostic nor experimental options should be used casually, 619// and they are not supported on production loads, except under explicit 620// direction from support engineers. 621// 622// manageable flags are writeable external product flags. 623// They are dynamically writeable through the JDK management interface 624// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 625// These flags are external exported interface (see CCC). The list of 626// manageable flags can be queried programmatically through the management 627// interface. 628// 629// A flag can be made as "manageable" only if 630// - the flag is defined in a CCC as an external exported interface. 631// - the VM implementation supports dynamic setting of the flag. 632// This implies that the VM must *always* query the flag variable 633// and not reuse state related to the flag state at any given time. 634// - you want the flag to be queried programmatically by the customers. 635// 636// product_rw flags are writeable internal product flags. 637// They are like "manageable" flags but for internal/private use. 638// The list of product_rw flags are internal/private flags which 639// may be changed/removed in a future release. It can be set 640// through the management interface to get/set value 641// when the name of flag is supplied. 642// 643// A flag can be made as "product_rw" only if 644// - the VM implementation supports dynamic setting of the flag. 645// This implies that the VM must *always* query the flag variable 646// and not reuse state related to the flag state at any given time. 647// 648// Note that when there is a need to support develop flags to be writeable, 649// it can be done in the same way as product_rw. 650// 651// range is a macro that will expand to min and max arguments for range 652// checking code if provided - see commandLineFlagRangeList.hpp 653// 654// constraint is a macro that will expand to custom function call 655// for constraint checking if provided - see commandLineFlagConstraintList.hpp 656// 657// writeable is a macro that controls if and how the value can change during the runtime 658// 659// writeable(Always) is optional and allows the flag to have its value changed 660// without any limitations at any time 661// 662// writeable(Once) flag value's can be only set once during the lifetime of VM 663// 664// writeable(CommandLineOnly) flag value's can be only set from command line 665// (multiple times allowed) 666// 667 668 669#define RUNTIME_FLAGS(develop, \ 670 develop_pd, \ 671 product, \ 672 product_pd, \ 673 diagnostic, \ 674 diagnostic_pd, \ 675 experimental, \ 676 notproduct, \ 677 manageable, \ 678 product_rw, \ 679 lp64_product, \ 680 range, \ 681 constraint, \ 682 writeable) \ 683 \ 684 lp64_product(bool, UseCompressedOops, false, \ 685 "Use 32-bit object references in 64-bit VM. " \ 686 "lp64_product means flag is always constant in 32 bit VM") \ 687 \ 688 lp64_product(bool, UseCompressedClassPointers, false, \ 689 "Use 32-bit class pointers in 64-bit VM. " \ 690 "lp64_product means flag is always constant in 32 bit VM") \ 691 \ 692 notproduct(bool, CheckCompressedOops, true, \ 693 "Generate checks in encoding/decoding code in debug VM") \ 694 \ 695 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 696 "Heap allocation steps through preferred address regions to find" \ 697 " where it can allocate the heap. Number of steps to take per " \ 698 "region.") \ 699 range(1, max_uintx) \ 700 \ 701 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 702 "Default object alignment in bytes, 8 is minimum") \ 703 range(8, 256) \ 704 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 705 \ 706 product(bool, AssumeMP, false, \ 707 "Instruct the VM to assume multiple processors are available") \ 708 \ 709 /* UseMembar is theoretically a temp flag used for memory barrier */ \ 710 /* removal testing. It was supposed to be removed before FCS but has */ \ 711 /* been re-added (see 6401008) */ \ 712 product_pd(bool, UseMembar, \ 713 "(Unstable) Issues membars on thread state transitions") \ 714 \ 715 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 716 "Clean the chunk pool asynchronously") \ 717 \ 718 experimental(bool, AlwaysSafeConstructors, false, \ 719 "Force safe construction, as if all fields are final.") \ 720 \ 721 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 722 "Enable normal processing of flags relating to field diagnostics")\ 723 \ 724 experimental(bool, UnlockExperimentalVMOptions, false, \ 725 "Enable normal processing of flags relating to experimental " \ 726 "features") \ 727 \ 728 product(bool, JavaMonitorsInStackTrace, true, \ 729 "Print information about Java monitor locks when the stacks are" \ 730 "dumped") \ 731 \ 732 product_pd(bool, UseLargePages, \ 733 "Use large page memory") \ 734 \ 735 product_pd(bool, UseLargePagesIndividualAllocation, \ 736 "Allocate large pages individually for better affinity") \ 737 \ 738 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 739 "Fail large pages individual allocation") \ 740 \ 741 product(bool, UseLargePagesInMetaspace, false, \ 742 "Use large page memory in metaspace. " \ 743 "Only used if UseLargePages is enabled.") \ 744 \ 745 product(bool, UseNUMA, false, \ 746 "Use NUMA if available") \ 747 \ 748 product(bool, UseNUMAInterleaving, false, \ 749 "Interleave memory across NUMA nodes if available") \ 750 \ 751 product(size_t, NUMAInterleaveGranularity, 2*M, \ 752 "Granularity to use for NUMA interleaving on Windows OS") \ 753 range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \ 754 \ 755 product(bool, ForceNUMA, false, \ 756 "Force NUMA optimizations on single-node/UMA systems") \ 757 \ 758 product(uintx, NUMAChunkResizeWeight, 20, \ 759 "Percentage (0-100) used to weight the current sample when " \ 760 "computing exponentially decaying average for " \ 761 "AdaptiveNUMAChunkSizing") \ 762 range(0, 100) \ 763 \ 764 product(size_t, NUMASpaceResizeRate, 1*G, \ 765 "Do not reallocate more than this amount per collection") \ 766 range(0, max_uintx) \ 767 \ 768 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 769 "Enable adaptive chunk sizing for NUMA") \ 770 \ 771 product(bool, NUMAStats, false, \ 772 "Print NUMA stats in detailed heap information") \ 773 \ 774 product(uintx, NUMAPageScanRate, 256, \ 775 "Maximum number of pages to include in the page scan procedure") \ 776 range(0, max_uintx) \ 777 \ 778 product_pd(bool, NeedsDeoptSuspend, \ 779 "True for register window machines (sparc/ia64)") \ 780 \ 781 product(intx, UseSSE, 99, \ 782 "Highest supported SSE instructions set on x86/x64") \ 783 range(0, 99) \ 784 \ 785 product(bool, UseAES, false, \ 786 "Control whether AES instructions can be used on x86/x64") \ 787 \ 788 product(bool, UseSHA, false, \ 789 "Control whether SHA instructions can be used " \ 790 "on SPARC, on ARM and on x86") \ 791 \ 792 diagnostic(bool, UseGHASHIntrinsics, false, \ 793 "Use intrinsics for GHASH versions of crypto") \ 794 \ 795 product(size_t, LargePageSizeInBytes, 0, \ 796 "Large page size (0 to let VM choose the page size)") \ 797 range(0, max_uintx) \ 798 \ 799 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 800 "Use large pages if maximum heap is at least this big") \ 801 range(0, max_uintx) \ 802 \ 803 product(bool, ForceTimeHighResolution, false, \ 804 "Using high time resolution (for Win32 only)") \ 805 \ 806 develop(bool, TracePcPatching, false, \ 807 "Trace usage of frame::patch_pc") \ 808 \ 809 develop(bool, TraceRelocator, false, \ 810 "Trace the bytecode relocator") \ 811 \ 812 develop(bool, TraceLongCompiles, false, \ 813 "Print out every time compilation is longer than " \ 814 "a given threshold") \ 815 \ 816 develop(bool, SafepointALot, false, \ 817 "Generate a lot of safepoints. This works with " \ 818 "GuaranteedSafepointInterval") \ 819 \ 820 product_pd(bool, BackgroundCompilation, \ 821 "A thread requesting compilation is not blocked during " \ 822 "compilation") \ 823 \ 824 product(bool, PrintVMQWaitTime, false, \ 825 "Print out the waiting time in VM operation queue") \ 826 \ 827 develop(bool, TraceOopMapGeneration, false, \ 828 "Show OopMapGeneration") \ 829 \ 830 product(bool, MethodFlushing, true, \ 831 "Reclamation of zombie and not-entrant methods") \ 832 \ 833 develop(bool, VerifyStack, false, \ 834 "Verify stack of each thread when it is entering a runtime call") \ 835 \ 836 diagnostic(bool, ForceUnreachable, false, \ 837 "Make all non code cache addresses to be unreachable by " \ 838 "forcing use of 64bit literal fixups") \ 839 \ 840 notproduct(bool, StressDerivedPointers, false, \ 841 "Force scavenge when a derived pointer is detected on stack " \ 842 "after rtm call") \ 843 \ 844 develop(bool, TraceDerivedPointers, false, \ 845 "Trace traversal of derived pointers on stack") \ 846 \ 847 notproduct(bool, TraceCodeBlobStacks, false, \ 848 "Trace stack-walk of codeblobs") \ 849 \ 850 product(bool, PrintJNIResolving, false, \ 851 "Used to implement -v:jni") \ 852 \ 853 notproduct(bool, PrintRewrites, false, \ 854 "Print methods that are being rewritten") \ 855 \ 856 product(bool, UseInlineCaches, true, \ 857 "Use Inline Caches for virtual calls ") \ 858 \ 859 diagnostic(bool, InlineArrayCopy, true, \ 860 "Inline arraycopy native that is known to be part of " \ 861 "base library DLL") \ 862 \ 863 diagnostic(bool, InlineObjectHash, true, \ 864 "Inline Object::hashCode() native that is known to be part " \ 865 "of base library DLL") \ 866 \ 867 diagnostic(bool, InlineNatives, true, \ 868 "Inline natives that are known to be part of base library DLL") \ 869 \ 870 diagnostic(bool, InlineMathNatives, true, \ 871 "Inline SinD, CosD, etc.") \ 872 \ 873 diagnostic(bool, InlineClassNatives, true, \ 874 "Inline Class.isInstance, etc") \ 875 \ 876 diagnostic(bool, InlineThreadNatives, true, \ 877 "Inline Thread.currentThread, etc") \ 878 \ 879 diagnostic(bool, InlineUnsafeOps, true, \ 880 "Inline memory ops (native methods) from Unsafe") \ 881 \ 882 product(bool, CriticalJNINatives, true, \ 883 "Check for critical JNI entry points") \ 884 \ 885 notproduct(bool, StressCriticalJNINatives, false, \ 886 "Exercise register saving code in critical natives") \ 887 \ 888 diagnostic(bool, UseAESIntrinsics, false, \ 889 "Use intrinsics for AES versions of crypto") \ 890 \ 891 diagnostic(bool, UseAESCTRIntrinsics, false, \ 892 "Use intrinsics for the paralleled version of AES/CTR crypto") \ 893 \ 894 diagnostic(bool, UseSHA1Intrinsics, false, \ 895 "Use intrinsics for SHA-1 crypto hash function. " \ 896 "Requires that UseSHA is enabled.") \ 897 \ 898 diagnostic(bool, UseSHA256Intrinsics, false, \ 899 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 900 "Requires that UseSHA is enabled.") \ 901 \ 902 diagnostic(bool, UseSHA512Intrinsics, false, \ 903 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 904 "Requires that UseSHA is enabled.") \ 905 \ 906 diagnostic(bool, UseCRC32Intrinsics, false, \ 907 "use intrinsics for java.util.zip.CRC32") \ 908 \ 909 diagnostic(bool, UseCRC32CIntrinsics, false, \ 910 "use intrinsics for java.util.zip.CRC32C") \ 911 \ 912 diagnostic(bool, UseAdler32Intrinsics, false, \ 913 "use intrinsics for java.util.zip.Adler32") \ 914 \ 915 diagnostic(bool, UseVectorizedMismatchIntrinsic, false, \ 916 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ 917 \ 918 diagnostic(ccstrlist, DisableIntrinsic, "", \ 919 "do not expand intrinsics whose (internal) names appear here") \ 920 \ 921 develop(bool, TraceCallFixup, false, \ 922 "Trace all call fixups") \ 923 \ 924 develop(bool, DeoptimizeALot, false, \ 925 "Deoptimize at every exit from the runtime system") \ 926 \ 927 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 928 "A comma separated list of bcis to deoptimize at") \ 929 \ 930 product(bool, DeoptimizeRandom, false, \ 931 "Deoptimize random frames on random exit from the runtime system")\ 932 \ 933 notproduct(bool, ZombieALot, false, \ 934 "Create zombies (non-entrant) at exit from the runtime system") \ 935 \ 936 product(bool, UnlinkSymbolsALot, false, \ 937 "Unlink unreferenced symbols from the symbol table at safepoints")\ 938 \ 939 notproduct(bool, WalkStackALot, false, \ 940 "Trace stack (no print) at every exit from the runtime system") \ 941 \ 942 product(bool, Debugging, false, \ 943 "Set when executing debug methods in debug.cpp " \ 944 "(to prevent triggering assertions)") \ 945 \ 946 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 947 "Enable strict checks that safepoints cannot happen for threads " \ 948 "that use NoSafepointVerifier") \ 949 \ 950 notproduct(bool, VerifyLastFrame, false, \ 951 "Verify oops on last frame on entry to VM") \ 952 \ 953 product(bool, FailOverToOldVerifier, true, \ 954 "Fail over to old verifier when split verifier fails") \ 955 \ 956 develop(bool, ShowSafepointMsgs, false, \ 957 "Show message about safepoint synchronization") \ 958 \ 959 product(bool, SafepointTimeout, false, \ 960 "Time out and warn or fail after SafepointTimeoutDelay " \ 961 "milliseconds if failed to reach safepoint") \ 962 \ 963 develop(bool, DieOnSafepointTimeout, false, \ 964 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 965 \ 966 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 967 /* typically, at most a few retries are needed */ \ 968 product(intx, SuspendRetryCount, 50, \ 969 "Maximum retry count for an external suspend request") \ 970 range(0, max_intx) \ 971 \ 972 product(intx, SuspendRetryDelay, 5, \ 973 "Milliseconds to delay per retry (* current_retry_count)") \ 974 range(0, max_intx) \ 975 \ 976 product(bool, AssertOnSuspendWaitFailure, false, \ 977 "Assert/Guarantee on external suspend wait failure") \ 978 \ 979 product(bool, TraceSuspendWaitFailures, false, \ 980 "Trace external suspend wait failures") \ 981 \ 982 product(bool, MaxFDLimit, true, \ 983 "Bump the number of file descriptors to maximum in Solaris") \ 984 \ 985 diagnostic(bool, LogEvents, true, \ 986 "Enable the various ring buffer event logs") \ 987 \ 988 diagnostic(uintx, LogEventsBufferEntries, 10, \ 989 "Number of ring buffer event logs") \ 990 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 991 \ 992 product(bool, BytecodeVerificationRemote, true, \ 993 "Enable the Java bytecode verifier for remote classes") \ 994 \ 995 product(bool, BytecodeVerificationLocal, false, \ 996 "Enable the Java bytecode verifier for local classes") \ 997 \ 998 develop(bool, ForceFloatExceptions, trueInDebug, \ 999 "Force exceptions on FP stack under/overflow") \ 1000 \ 1001 develop(bool, VerifyStackAtCalls, false, \ 1002 "Verify that the stack pointer is unchanged after calls") \ 1003 \ 1004 develop(bool, TraceJavaAssertions, false, \ 1005 "Trace java language assertions") \ 1006 \ 1007 notproduct(bool, CheckAssertionStatusDirectives, false, \ 1008 "Temporary - see javaClasses.cpp") \ 1009 \ 1010 notproduct(bool, PrintMallocFree, false, \ 1011 "Trace calls to C heap malloc/free allocation") \ 1012 \ 1013 notproduct(bool, VerifyCodeCache, false, \ 1014 "Verify code cache on memory allocation/deallocation") \ 1015 \ 1016 develop(bool, UseMallocOnly, false, \ 1017 "Use only malloc/free for allocation (no resource area/arena)") \ 1018 \ 1019 develop(bool, PrintMalloc, false, \ 1020 "Print all malloc/free calls") \ 1021 \ 1022 develop(bool, PrintMallocStatistics, false, \ 1023 "Print malloc/free statistics") \ 1024 \ 1025 develop(bool, ZapResourceArea, trueInDebug, \ 1026 "Zap freed resource/arena space with 0xABABABAB") \ 1027 \ 1028 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 1029 "Zap freed VM handle space with 0xBCBCBCBC") \ 1030 \ 1031 develop(bool, ZapJNIHandleArea, trueInDebug, \ 1032 "Zap freed JNI handle space with 0xFEFEFEFE") \ 1033 \ 1034 notproduct(bool, ZapStackSegments, trueInDebug, \ 1035 "Zap allocated/freed stack segments with 0xFADFADED") \ 1036 \ 1037 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 1038 "Zap unused heap space with 0xBAADBABE") \ 1039 \ 1040 develop(bool, CheckZapUnusedHeapArea, false, \ 1041 "Check zapping of unused heap space") \ 1042 \ 1043 develop(bool, ZapFillerObjects, trueInDebug, \ 1044 "Zap filler objects with 0xDEAFBABE") \ 1045 \ 1046 develop(bool, PrintVMMessages, true, \ 1047 "Print VM messages on console") \ 1048 \ 1049 notproduct(uintx, ErrorHandlerTest, 0, \ 1050 "If > 0, provokes an error after VM initialization; the value " \ 1051 "determines which error to provoke. See test_error_handler() " \ 1052 "in debug.cpp.") \ 1053 \ 1054 notproduct(uintx, TestCrashInErrorHandler, 0, \ 1055 "If > 0, provokes an error inside VM error handler (a secondary " \ 1056 "crash). see test_error_handler() in debug.cpp.") \ 1057 \ 1058 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 1059 "If true, tests SafeFetch inside error handler.") \ 1060 \ 1061 develop(bool, Verbose, false, \ 1062 "Print additional debugging information from other modes") \ 1063 \ 1064 develop(bool, PrintMiscellaneous, false, \ 1065 "Print uncategorized debugging information (requires +Verbose)") \ 1066 \ 1067 develop(bool, WizardMode, false, \ 1068 "Print much more debugging information") \ 1069 \ 1070 product(bool, ShowMessageBoxOnError, false, \ 1071 "Keep process alive on VM fatal error") \ 1072 \ 1073 product(bool, CreateCoredumpOnCrash, true, \ 1074 "Create core/mini dump on VM fatal error") \ 1075 \ 1076 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 1077 "Timeout, in seconds, to limit the time spent on writing an " \ 1078 "error log in case of a crash.") \ 1079 range(0, (uint64_t)max_jlong/1000) \ 1080 \ 1081 product_pd(bool, UseOSErrorReporting, \ 1082 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 1083 \ 1084 product(bool, SuppressFatalErrorMessage, false, \ 1085 "Report NO fatal error message (avoid deadlock)") \ 1086 \ 1087 product(ccstrlist, OnError, "", \ 1088 "Run user-defined commands on fatal error; see VMError.cpp " \ 1089 "for examples") \ 1090 \ 1091 product(ccstrlist, OnOutOfMemoryError, "", \ 1092 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 1093 \ 1094 manageable(bool, HeapDumpBeforeFullGC, false, \ 1095 "Dump heap to file before any major stop-the-world GC") \ 1096 \ 1097 manageable(bool, HeapDumpAfterFullGC, false, \ 1098 "Dump heap to file after any major stop-the-world GC") \ 1099 \ 1100 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 1101 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 1102 \ 1103 manageable(ccstr, HeapDumpPath, NULL, \ 1104 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 1105 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 1106 "in the working directory)") \ 1107 \ 1108 develop(bool, BreakAtWarning, false, \ 1109 "Execute breakpoint upon encountering VM warning") \ 1110 \ 1111 develop(bool, UseFakeTimers, false, \ 1112 "Tell whether the VM should use system time or a fake timer") \ 1113 \ 1114 product(ccstr, NativeMemoryTracking, "off", \ 1115 "Native memory tracking options") \ 1116 \ 1117 diagnostic(bool, PrintNMTStatistics, false, \ 1118 "Print native memory tracking summary data if it is on") \ 1119 \ 1120 diagnostic(bool, LogCompilation, false, \ 1121 "Log compilation activity in detail to LogFile") \ 1122 \ 1123 product(bool, PrintCompilation, false, \ 1124 "Print compilations") \ 1125 \ 1126 diagnostic(bool, TraceNMethodInstalls, false, \ 1127 "Trace nmethod installation") \ 1128 \ 1129 diagnostic(intx, ScavengeRootsInCode, 2, \ 1130 "0: do not allow scavengable oops in the code cache; " \ 1131 "1: allow scavenging from the code cache; " \ 1132 "2: emit as many constants as the compiler can see") \ 1133 range(0, 2) \ 1134 \ 1135 product(bool, AlwaysRestoreFPU, false, \ 1136 "Restore the FPU control word after every JNI call (expensive)") \ 1137 \ 1138 diagnostic(bool, PrintCompilation2, false, \ 1139 "Print additional statistics per compilation") \ 1140 \ 1141 diagnostic(bool, PrintAdapterHandlers, false, \ 1142 "Print code generated for i2c/c2i adapters") \ 1143 \ 1144 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 1145 "Verify that i2c/c2i adapters are called properly") \ 1146 \ 1147 develop(bool, VerifyAdapterSharing, false, \ 1148 "Verify that the code for shared adapters is the equivalent") \ 1149 \ 1150 diagnostic(bool, PrintAssembly, false, \ 1151 "Print assembly code (using external disassembler.so)") \ 1152 \ 1153 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 1154 "Print options string passed to disassembler.so") \ 1155 \ 1156 notproduct(bool, PrintNMethodStatistics, false, \ 1157 "Print a summary statistic for the generated nmethods") \ 1158 \ 1159 diagnostic(bool, PrintNMethods, false, \ 1160 "Print assembly code for nmethods when generated") \ 1161 \ 1162 diagnostic(bool, PrintNativeNMethods, false, \ 1163 "Print assembly code for native nmethods when generated") \ 1164 \ 1165 develop(bool, PrintDebugInfo, false, \ 1166 "Print debug information for all nmethods when generated") \ 1167 \ 1168 develop(bool, PrintRelocations, false, \ 1169 "Print relocation information for all nmethods when generated") \ 1170 \ 1171 develop(bool, PrintDependencies, false, \ 1172 "Print dependency information for all nmethods when generated") \ 1173 \ 1174 develop(bool, PrintExceptionHandlers, false, \ 1175 "Print exception handler tables for all nmethods when generated") \ 1176 \ 1177 develop(bool, StressCompiledExceptionHandlers, false, \ 1178 "Exercise compiled exception handlers") \ 1179 \ 1180 develop(bool, InterceptOSException, false, \ 1181 "Start debugger when an implicit OS (e.g. NULL) " \ 1182 "exception happens") \ 1183 \ 1184 product(bool, PrintCodeCache, false, \ 1185 "Print the code cache memory usage when exiting") \ 1186 \ 1187 develop(bool, PrintCodeCache2, false, \ 1188 "Print detailed usage information on the code cache when exiting")\ 1189 \ 1190 product(bool, PrintCodeCacheOnCompilation, false, \ 1191 "Print the code cache memory usage each time a method is " \ 1192 "compiled") \ 1193 \ 1194 diagnostic(bool, PrintStubCode, false, \ 1195 "Print generated stub code") \ 1196 \ 1197 product(bool, StackTraceInThrowable, true, \ 1198 "Collect backtrace in throwable when exception happens") \ 1199 \ 1200 product(bool, OmitStackTraceInFastThrow, true, \ 1201 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1202 \ 1203 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1204 "Print bytecode statistics when dumping profiler output") \ 1205 \ 1206 product(bool, ProfilerRecordPC, false, \ 1207 "Collect ticks for each 16 byte interval of compiled code") \ 1208 \ 1209 product(bool, ProfileVM, false, \ 1210 "Profile ticks that fall within VM (either in the VM Thread " \ 1211 "or VM code called through stubs)") \ 1212 \ 1213 product(bool, ProfileIntervals, false, \ 1214 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1215 \ 1216 notproduct(bool, ProfilerCheckIntervals, false, \ 1217 "Collect and print information on spacing of profiler ticks") \ 1218 \ 1219 product(bool, PrintWarnings, true, \ 1220 "Print JVM warnings to output stream") \ 1221 \ 1222 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1223 "Print warnings for stalled SpinLocks") \ 1224 \ 1225 product(bool, RegisterFinalizersAtInit, true, \ 1226 "Register finalizable objects at end of Object.<init> or " \ 1227 "after allocation") \ 1228 \ 1229 develop(bool, RegisterReferences, true, \ 1230 "Tell whether the VM should register soft/weak/final/phantom " \ 1231 "references") \ 1232 \ 1233 develop(bool, IgnoreRewrites, false, \ 1234 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1235 "This is unsafe!") \ 1236 \ 1237 develop(bool, PrintCodeCacheExtension, false, \ 1238 "Print extension of code cache") \ 1239 \ 1240 develop(bool, UsePrivilegedStack, true, \ 1241 "Enable the security JVM functions") \ 1242 \ 1243 develop(bool, ProtectionDomainVerification, true, \ 1244 "Verify protection domain before resolution in system dictionary")\ 1245 \ 1246 product(bool, ClassUnloading, true, \ 1247 "Do unloading of classes") \ 1248 \ 1249 product(bool, ClassUnloadingWithConcurrentMark, true, \ 1250 "Do unloading of classes with a concurrent marking cycle") \ 1251 \ 1252 develop(bool, DisableStartThread, false, \ 1253 "Disable starting of additional Java threads " \ 1254 "(for debugging only)") \ 1255 \ 1256 develop(bool, MemProfiling, false, \ 1257 "Write memory usage profiling to log file") \ 1258 \ 1259 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1260 "Print the system dictionary at exit") \ 1261 \ 1262 experimental(intx, PredictedLoadedClassCount, 0, \ 1263 "Experimental: Tune loaded class cache starting size") \ 1264 \ 1265 diagnostic(bool, UnsyncloadClass, false, \ 1266 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1267 "class loader must call VM synchronized for findClass " \ 1268 "and defineClass.") \ 1269 \ 1270 product(bool, AlwaysLockClassLoader, false, \ 1271 "Require the VM to acquire the class loader lock before calling " \ 1272 "loadClass() even for class loaders registering " \ 1273 "as parallel capable") \ 1274 \ 1275 product(bool, AllowParallelDefineClass, false, \ 1276 "Allow parallel defineClass requests for class loaders " \ 1277 "registering as parallel capable") \ 1278 \ 1279 product(bool, MustCallLoadClassInternal, false, \ 1280 "Call loadClassInternal() rather than loadClass()") \ 1281 \ 1282 product_pd(bool, DontYieldALot, \ 1283 "Throw away obvious excess yield calls") \ 1284 \ 1285 product(bool, ConvertSleepToYield, true, \ 1286 "Convert sleep(0) to thread yield ") \ 1287 \ 1288 product(bool, ConvertYieldToSleep, false, \ 1289 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1290 "behavior") \ 1291 \ 1292 develop(bool, UseDetachedThreads, true, \ 1293 "Use detached threads that are recycled upon termination " \ 1294 "(for Solaris only)") \ 1295 \ 1296 product(bool, UseLWPSynchronization, true, \ 1297 "Use LWP-based instead of libthread-based synchronization " \ 1298 "(SPARC only)") \ 1299 \ 1300 experimental(ccstr, SyncKnobs, NULL, \ 1301 "(Unstable) Various monitor synchronization tunables") \ 1302 \ 1303 experimental(intx, EmitSync, 0, \ 1304 "(Unsafe, Unstable) " \ 1305 "Control emission of inline sync fast-path code") \ 1306 \ 1307 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1308 range(0, max_jint) \ 1309 \ 1310 product(bool, MonitorInUseLists, true, "Track Monitors for Deflation") \ 1311 \ 1312 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1313 "Experimental Sync flags") \ 1314 \ 1315 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1316 \ 1317 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \ 1318 \ 1319 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1320 \ 1321 experimental(intx, hashCode, 5, \ 1322 "(Unstable) select hashCode generation algorithm") \ 1323 \ 1324 product(bool, FilterSpuriousWakeups, true, \ 1325 "When true prevents OS-level spurious, or premature, wakeups " \ 1326 "from Object.wait (Ignored for Windows)") \ 1327 \ 1328 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1329 \ 1330 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1331 \ 1332 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1333 \ 1334 develop(bool, UsePthreads, false, \ 1335 "Use pthread-based instead of libthread-based synchronization " \ 1336 "(SPARC only)") \ 1337 \ 1338 product(bool, ReduceSignalUsage, false, \ 1339 "Reduce the use of OS signals in Java and/or the VM") \ 1340 \ 1341 develop_pd(bool, ShareVtableStubs, \ 1342 "Share vtable stubs (smaller code but worse branch prediction") \ 1343 \ 1344 develop(bool, LoadLineNumberTables, true, \ 1345 "Tell whether the class file parser loads line number tables") \ 1346 \ 1347 develop(bool, LoadLocalVariableTables, true, \ 1348 "Tell whether the class file parser loads local variable tables") \ 1349 \ 1350 develop(bool, LoadLocalVariableTypeTables, true, \ 1351 "Tell whether the class file parser loads local variable type" \ 1352 "tables") \ 1353 \ 1354 product(bool, AllowUserSignalHandlers, false, \ 1355 "Do not complain if the application installs signal handlers " \ 1356 "(Solaris & Linux only)") \ 1357 \ 1358 product(bool, UseSignalChaining, true, \ 1359 "Use signal-chaining to invoke signal handlers installed " \ 1360 "by the application (Solaris & Linux only)") \ 1361 \ 1362 product(bool, AllowJNIEnvProxy, false, \ 1363 "Allow JNIEnv proxies for jdbx") \ 1364 \ 1365 product(bool, RestoreMXCSROnJNICalls, false, \ 1366 "Restore MXCSR when returning from JNI calls") \ 1367 \ 1368 product(bool, CheckJNICalls, false, \ 1369 "Verify all arguments to JNI calls") \ 1370 \ 1371 product(bool, CheckEndorsedAndExtDirs, false, \ 1372 "Verify the endorsed and extension directories are not used") \ 1373 \ 1374 product(bool, UseFastJNIAccessors, true, \ 1375 "Use optimized versions of Get<Primitive>Field") \ 1376 \ 1377 product(intx, MaxJNILocalCapacity, 65536, \ 1378 "Maximum allowable local JNI handle capacity to " \ 1379 "EnsureLocalCapacity() and PushLocalFrame(), " \ 1380 "where <= 0 is unlimited, default: 65536") \ 1381 range(min_intx, max_intx) \ 1382 \ 1383 product(bool, EagerXrunInit, false, \ 1384 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1385 "but not all -Xrun libraries may support the state of the VM " \ 1386 "at this time") \ 1387 \ 1388 product(bool, PreserveAllAnnotations, false, \ 1389 "Preserve RuntimeInvisibleAnnotations as well " \ 1390 "as RuntimeVisibleAnnotations") \ 1391 \ 1392 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1393 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1394 \ 1395 product(bool, UseXMMForArrayCopy, false, \ 1396 "Use SSE2 MOVQ instruction for Arraycopy") \ 1397 \ 1398 product(intx, FieldsAllocationStyle, 1, \ 1399 "0 - type based with oops first, " \ 1400 "1 - with oops last, " \ 1401 "2 - oops in super and sub classes are together") \ 1402 range(0, 2) \ 1403 \ 1404 product(bool, CompactFields, true, \ 1405 "Allocate nonstatic fields in gaps between previous fields") \ 1406 \ 1407 notproduct(bool, PrintFieldLayout, false, \ 1408 "Print field layout for each class") \ 1409 \ 1410 /* Need to limit the extent of the padding to reasonable size. */\ 1411 /* 8K is well beyond the reasonable HW cache line size, even with */\ 1412 /* aggressive prefetching, while still leaving the room for segregating */\ 1413 /* among the distinct pages. */\ 1414 product(intx, ContendedPaddingWidth, 128, \ 1415 "How many bytes to pad the fields/classes marked @Contended with")\ 1416 range(0, 8192) \ 1417 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 1418 \ 1419 product(bool, EnableContended, true, \ 1420 "Enable @Contended annotation support") \ 1421 \ 1422 product(bool, RestrictContended, true, \ 1423 "Restrict @Contended to trusted classes") \ 1424 \ 1425 product(bool, UseBiasedLocking, true, \ 1426 "Enable biased locking in JVM") \ 1427 \ 1428 product(intx, BiasedLockingStartupDelay, 4000, \ 1429 "Number of milliseconds to wait before enabling biased locking") \ 1430 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 1431 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 1432 \ 1433 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1434 "Print statistics of biased locking in JVM") \ 1435 \ 1436 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1437 "Threshold of number of revocations per type to try to " \ 1438 "rebias all objects in the heap of that type") \ 1439 range(0, max_intx) \ 1440 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 1441 \ 1442 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1443 "Threshold of number of revocations per type to permanently " \ 1444 "revoke biases of all objects in the heap of that type") \ 1445 range(0, max_intx) \ 1446 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 1447 \ 1448 product(intx, BiasedLockingDecayTime, 25000, \ 1449 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1450 "type after previous bulk rebias") \ 1451 range(500, max_intx) \ 1452 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 1453 \ 1454 product(bool, ExitOnOutOfMemoryError, false, \ 1455 "JVM exits on the first occurrence of an out-of-memory error") \ 1456 \ 1457 product(bool, CrashOnOutOfMemoryError, false, \ 1458 "JVM aborts, producing an error log and core/mini dump, on the " \ 1459 "first occurrence of an out-of-memory error") \ 1460 \ 1461 /* tracing */ \ 1462 \ 1463 develop(bool, StressRewriter, false, \ 1464 "Stress linktime bytecode rewriting") \ 1465 \ 1466 product(ccstr, TraceJVMTI, NULL, \ 1467 "Trace flags for JVMTI functions and events") \ 1468 \ 1469 /* This option can change an EMCP method into an obsolete method. */ \ 1470 /* This can affect tests that except specific methods to be EMCP. */ \ 1471 /* This option should be used with caution. */ \ 1472 product(bool, StressLdcRewrite, false, \ 1473 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1474 \ 1475 /* change to false by default sometime after Mustang */ \ 1476 product(bool, VerifyMergedCPBytecodes, true, \ 1477 "Verify bytecodes after RedefineClasses constant pool merging") \ 1478 \ 1479 develop(bool, TraceBytecodes, false, \ 1480 "Trace bytecode execution") \ 1481 \ 1482 develop(bool, TraceICs, false, \ 1483 "Trace inline cache changes") \ 1484 \ 1485 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1486 "Trace method invocation counter overflow") \ 1487 \ 1488 develop(bool, TraceInlineCacheClearing, false, \ 1489 "Trace clearing of inline caches in nmethods") \ 1490 \ 1491 develop(bool, TraceDependencies, false, \ 1492 "Trace dependencies") \ 1493 \ 1494 develop(bool, VerifyDependencies, trueInDebug, \ 1495 "Exercise and verify the compilation dependency mechanism") \ 1496 \ 1497 develop(bool, TraceNewOopMapGeneration, false, \ 1498 "Trace OopMapGeneration") \ 1499 \ 1500 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1501 "Trace OopMapGeneration: print detailed cell states") \ 1502 \ 1503 develop(bool, TimeOopMap, false, \ 1504 "Time calls to GenerateOopMap::compute_map() in sum") \ 1505 \ 1506 develop(bool, TimeOopMap2, false, \ 1507 "Time calls to GenerateOopMap::compute_map() individually") \ 1508 \ 1509 develop(bool, TraceOopMapRewrites, false, \ 1510 "Trace rewriting of method oops during oop map generation") \ 1511 \ 1512 develop(bool, TraceICBuffer, false, \ 1513 "Trace usage of IC buffer") \ 1514 \ 1515 develop(bool, TraceCompiledIC, false, \ 1516 "Trace changes of compiled IC") \ 1517 \ 1518 /* gc */ \ 1519 \ 1520 product(bool, UseSerialGC, false, \ 1521 "Use the Serial garbage collector") \ 1522 \ 1523 product(bool, UseG1GC, false, \ 1524 "Use the Garbage-First garbage collector") \ 1525 \ 1526 product(bool, UseParallelGC, false, \ 1527 "Use the Parallel Scavenge garbage collector") \ 1528 \ 1529 product(bool, UseParallelOldGC, false, \ 1530 "Use the Parallel Old garbage collector") \ 1531 \ 1532 product(uintx, HeapMaximumCompactionInterval, 20, \ 1533 "How often should we maximally compact the heap (not allowing " \ 1534 "any dead space)") \ 1535 range(0, max_uintx) \ 1536 \ 1537 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1538 "The collection count for the first maximum compaction") \ 1539 range(0, max_uintx) \ 1540 \ 1541 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1542 "Use maximum compaction in the Parallel Old garbage collector " \ 1543 "for a system GC") \ 1544 \ 1545 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1546 "The mean used by the parallel compact dead wood " \ 1547 "limiter (a number between 0-100)") \ 1548 range(0, 100) \ 1549 \ 1550 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1551 "The standard deviation used by the parallel compact dead wood " \ 1552 "limiter (a number between 0-100)") \ 1553 range(0, 100) \ 1554 \ 1555 product(uint, ParallelGCThreads, 0, \ 1556 "Number of parallel threads parallel gc will use") \ 1557 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \ 1558 \ 1559 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \ 1560 "Use semaphore synchronization for the GC Threads, " \ 1561 "instead of synchronization based on mutexes") \ 1562 \ 1563 product(bool, UseDynamicNumberOfGCThreads, false, \ 1564 "Dynamically choose the number of parallel threads " \ 1565 "parallel gc will use") \ 1566 \ 1567 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1568 "Force dynamic selection of the number of " \ 1569 "parallel threads parallel gc will use to aid debugging") \ 1570 \ 1571 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1572 "Size of heap (bytes) per GC thread used in calculating the " \ 1573 "number of GC threads") \ 1574 range((size_t)os::vm_page_size(), (size_t)max_uintx) \ 1575 \ 1576 product(uint, ConcGCThreads, 0, \ 1577 "Number of threads concurrent gc will use") \ 1578 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \ 1579 \ 1580 product(uintx, GCTaskTimeStampEntries, 200, \ 1581 "Number of time stamp entries per gc worker thread") \ 1582 range(1, max_uintx) \ 1583 \ 1584 product(bool, AlwaysTenure, false, \ 1585 "Always tenure objects in eden (ParallelGC only)") \ 1586 \ 1587 product(bool, NeverTenure, false, \ 1588 "Never tenure objects in eden, may tenure on overflow " \ 1589 "(ParallelGC only)") \ 1590 \ 1591 product(bool, ScavengeBeforeFullGC, true, \ 1592 "Scavenge youngest generation before each full GC.") \ 1593 \ 1594 product(bool, UseConcMarkSweepGC, false, \ 1595 "Use Concurrent Mark-Sweep GC in the old generation") \ 1596 \ 1597 product(bool, ExplicitGCInvokesConcurrent, false, \ 1598 "A System.gc() request invokes a concurrent collection; " \ 1599 "(effective only when using concurrent collectors)") \ 1600 \ 1601 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1602 "A System.gc() request invokes a concurrent collection and " \ 1603 "also unloads classes during such a concurrent gc cycle " \ 1604 "(effective only when UseConcMarkSweepGC)") \ 1605 \ 1606 product(bool, GCLockerInvokesConcurrent, false, \ 1607 "The exit of a JNI critical section necessitating a scavenge, " \ 1608 "also kicks off a background concurrent collection") \ 1609 \ 1610 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1611 "How much the GC can expand the eden by while the GC locker " \ 1612 "is active (as a percentage)") \ 1613 range(0, 100) \ 1614 \ 1615 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1616 "Number of times to retry allocations when " \ 1617 "blocked by the GC locker") \ 1618 range(0, max_uintx) \ 1619 \ 1620 product(bool, UseCMSBestFit, true, \ 1621 "Use CMS best fit allocation strategy") \ 1622 \ 1623 product(bool, UseParNewGC, false, \ 1624 "Use parallel threads in the new generation") \ 1625 \ 1626 product(uintx, ParallelGCBufferWastePct, 10, \ 1627 "Wasted fraction of parallel allocation buffer") \ 1628 range(0, 100) \ 1629 \ 1630 product(uintx, TargetPLABWastePct, 10, \ 1631 "Target wasted space in last buffer as percent of overall " \ 1632 "allocation") \ 1633 range(1, 100) \ 1634 \ 1635 product(uintx, PLABWeight, 75, \ 1636 "Percentage (0-100) used to weight the current sample when " \ 1637 "computing exponentially decaying average for ResizePLAB") \ 1638 range(0, 100) \ 1639 \ 1640 product(bool, ResizePLAB, true, \ 1641 "Dynamically resize (survivor space) promotion LAB's") \ 1642 \ 1643 product(int, ParGCArrayScanChunk, 50, \ 1644 "Scan a subset of object array and push remainder, if array is " \ 1645 "bigger than this") \ 1646 range(1, max_jint/3) \ 1647 \ 1648 product(bool, ParGCUseLocalOverflow, false, \ 1649 "Instead of a global overflow list, use local overflow stacks") \ 1650 \ 1651 product(bool, ParGCTrimOverflow, true, \ 1652 "Eagerly trim the local overflow lists " \ 1653 "(when ParGCUseLocalOverflow)") \ 1654 \ 1655 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1656 "Simulate work queue overflow in ParNew") \ 1657 \ 1658 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1659 "An `interval' counter that determines how frequently " \ 1660 "we simulate overflow; a smaller number increases frequency") \ 1661 \ 1662 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1663 "The desired number of objects to claim from the overflow list") \ 1664 range(0, max_uintx) \ 1665 \ 1666 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1667 "The number of strides per worker thread that we divide up the " \ 1668 "card table scanning work into") \ 1669 range(1, max_uintx) \ 1670 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \ 1671 \ 1672 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1673 "The number of cards in each chunk of the parallel chunks used " \ 1674 "during card table scanning") \ 1675 range(1, max_intx) \ 1676 constraint(ParGCCardsPerStrideChunkConstraintFunc,AfterMemoryInit)\ 1677 \ 1678 product(uintx, OldPLABWeight, 50, \ 1679 "Percentage (0-100) used to weight the current sample when " \ 1680 "computing exponentially decaying average for resizing " \ 1681 "OldPLABSize") \ 1682 range(0, 100) \ 1683 \ 1684 product(bool, ResizeOldPLAB, true, \ 1685 "Dynamically resize (old gen) promotion LAB's") \ 1686 \ 1687 product(size_t, CMSOldPLABMax, 1024, \ 1688 "Maximum size of CMS gen promotion LAB caches per worker " \ 1689 "per block size") \ 1690 range(1, max_uintx) \ 1691 constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \ 1692 \ 1693 product(size_t, CMSOldPLABMin, 16, \ 1694 "Minimum size of CMS gen promotion LAB caches per worker " \ 1695 "per block size") \ 1696 range(1, max_uintx) \ 1697 constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \ 1698 \ 1699 product(uintx, CMSOldPLABNumRefills, 4, \ 1700 "Nominal number of refills of CMS gen promotion LAB cache " \ 1701 "per worker per block size") \ 1702 range(1, max_uintx) \ 1703 \ 1704 product(bool, CMSOldPLABResizeQuicker, false, \ 1705 "React on-the-fly during a scavenge to a sudden " \ 1706 "change in block demand rate") \ 1707 \ 1708 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1709 "The tolerance of the phase-change detector for on-the-fly " \ 1710 "PLAB resizing during a scavenge") \ 1711 range(1, max_uintx) \ 1712 \ 1713 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1714 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1715 "during a scavenge") \ 1716 range(1, max_uintx) \ 1717 \ 1718 product(bool, AlwaysPreTouch, false, \ 1719 "Force all freshly committed pages to be pre-touched") \ 1720 \ 1721 product_pd(size_t, CMSYoungGenPerWorker, \ 1722 "The maximum size of young gen chosen by default per GC worker " \ 1723 "thread available") \ 1724 range(1, max_uintx) \ 1725 \ 1726 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1727 "Percentage (0-100) used to add conservatism when computing the " \ 1728 "duty cycle") \ 1729 range(0, 100) \ 1730 \ 1731 product(uintx, CMSExpAvgFactor, 50, \ 1732 "Percentage (0-100) used to weight the current sample when " \ 1733 "computing exponential averages for CMS statistics") \ 1734 range(0, 100) \ 1735 \ 1736 product(uintx, CMS_FLSWeight, 75, \ 1737 "Percentage (0-100) used to weight the current sample when " \ 1738 "computing exponentially decaying averages for CMS FLS " \ 1739 "statistics") \ 1740 range(0, 100) \ 1741 \ 1742 product(uintx, CMS_FLSPadding, 1, \ 1743 "The multiple of deviation from mean to use for buffering " \ 1744 "against volatility in free list demand") \ 1745 range(0, max_juint) \ 1746 \ 1747 product(uintx, FLSCoalescePolicy, 2, \ 1748 "CMS: aggressiveness level for coalescing, increasing " \ 1749 "from 0 to 4") \ 1750 range(0, 4) \ 1751 \ 1752 product(bool, FLSAlwaysCoalesceLarge, false, \ 1753 "CMS: larger free blocks are always available for coalescing") \ 1754 \ 1755 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1756 "CMS: the smaller the percentage the greater the coalescing " \ 1757 "force") \ 1758 range(0.0, 1.0) \ 1759 \ 1760 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1761 "CMS: the factor by which to inflate estimated demand of small " \ 1762 "block sizes to prevent coalescing with an adjoining block") \ 1763 range(0.0, DBL_MAX) \ 1764 \ 1765 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1766 "CMS: the factor by which to inflate estimated demand of large " \ 1767 "block sizes to prevent coalescing with an adjoining block") \ 1768 range(0.0, DBL_MAX) \ 1769 \ 1770 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1771 "CMS: the factor by which to inflate estimated demand of small " \ 1772 "block sizes to prevent splitting to supply demand for smaller " \ 1773 "blocks") \ 1774 range(0.0, DBL_MAX) \ 1775 \ 1776 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1777 "CMS: the factor by which to inflate estimated demand of large " \ 1778 "block sizes to prevent splitting to supply demand for smaller " \ 1779 "blocks") \ 1780 range(0.0, DBL_MAX) \ 1781 \ 1782 product(bool, CMSExtrapolateSweep, false, \ 1783 "CMS: cushion for block demand during sweep") \ 1784 \ 1785 product(uintx, CMS_SweepWeight, 75, \ 1786 "Percentage (0-100) used to weight the current sample when " \ 1787 "computing exponentially decaying average for inter-sweep " \ 1788 "duration") \ 1789 range(0, 100) \ 1790 \ 1791 product(uintx, CMS_SweepPadding, 1, \ 1792 "The multiple of deviation from mean to use for buffering " \ 1793 "against volatility in inter-sweep duration") \ 1794 range(0, max_juint) \ 1795 \ 1796 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1797 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1798 "duration exceeds this threshold in milliseconds") \ 1799 range(0, max_uintx) \ 1800 \ 1801 product(bool, CMSClassUnloadingEnabled, true, \ 1802 "Whether class unloading enabled when using CMS GC") \ 1803 \ 1804 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1805 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1806 "count for which classes may not be unloaded") \ 1807 range(0, max_uintx) \ 1808 \ 1809 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1810 "Replenish an indexed free list with this number of chunks") \ 1811 range(1, max_uintx) \ 1812 \ 1813 product(bool, CMSReplenishIntermediate, true, \ 1814 "Replenish all intermediate free-list caches") \ 1815 \ 1816 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1817 "When satisfying batched demand, split blocks from the " \ 1818 "IndexedFreeList whose size is a multiple of requested size") \ 1819 \ 1820 product(bool, CMSLoopWarn, false, \ 1821 "Warn in case of excessive CMS looping") \ 1822 \ 1823 /* where does the range max value of (max_jint - 1) come from? */ \ 1824 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1825 "Maximum size of marking stack") \ 1826 range(1, (max_jint - 1)) \ 1827 \ 1828 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1829 "Size of marking stack") \ 1830 constraint(MarkStackSizeConstraintFunc,AfterErgo) \ 1831 \ 1832 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1833 "Simulate frequent marking stack / work queue overflow") \ 1834 \ 1835 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1836 "An \"interval\" counter that determines how frequently " \ 1837 "to simulate overflow; a smaller number increases frequency") \ 1838 \ 1839 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1840 "Maximum number of abortable preclean iterations, if > 0") \ 1841 range(0, max_uintx) \ 1842 \ 1843 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1844 "Maximum time in abortable preclean (in milliseconds)") \ 1845 range(0, max_intx) \ 1846 \ 1847 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1848 "Nominal minimum work per abortable preclean iteration") \ 1849 range(0, max_uintx) \ 1850 \ 1851 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1852 "Time that we sleep between iterations when not given " \ 1853 "enough work per iteration") \ 1854 range(0, max_intx) \ 1855 \ 1856 /* 4096 = CardTableModRefBS::card_size_in_words * BitsPerWord */ \ 1857 product(size_t, CMSRescanMultiple, 32, \ 1858 "Size (in cards) of CMS parallel rescan task") \ 1859 range(1, SIZE_MAX / 4096) \ 1860 constraint(CMSRescanMultipleConstraintFunc,AfterMemoryInit) \ 1861 \ 1862 /* 4096 = CardTableModRefBS::card_size_in_words * BitsPerWord */ \ 1863 product(size_t, CMSConcMarkMultiple, 32, \ 1864 "Size (in cards) of CMS concurrent MT marking task") \ 1865 range(1, SIZE_MAX / 4096) \ 1866 constraint(CMSConcMarkMultipleConstraintFunc,AfterMemoryInit) \ 1867 \ 1868 product(bool, CMSAbortSemantics, false, \ 1869 "Whether abort-on-overflow semantics is implemented") \ 1870 \ 1871 product(bool, CMSParallelInitialMarkEnabled, true, \ 1872 "Use the parallel initial mark.") \ 1873 \ 1874 product(bool, CMSParallelRemarkEnabled, true, \ 1875 "Whether parallel remark enabled (only if ParNewGC)") \ 1876 \ 1877 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1878 "Whether parallel remark of survivor space " \ 1879 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1880 \ 1881 product(bool, CMSPLABRecordAlways, true, \ 1882 "Always record survivor space PLAB boundaries (effective only " \ 1883 "if CMSParallelSurvivorRemarkEnabled)") \ 1884 \ 1885 product(bool, CMSEdenChunksRecordAlways, true, \ 1886 "Always record eden chunks used for the parallel initial mark " \ 1887 "or remark of eden") \ 1888 \ 1889 product(bool, CMSConcurrentMTEnabled, true, \ 1890 "Whether multi-threaded concurrent work enabled " \ 1891 "(effective only if ParNewGC)") \ 1892 \ 1893 product(bool, CMSPrecleaningEnabled, true, \ 1894 "Whether concurrent precleaning enabled") \ 1895 \ 1896 product(uintx, CMSPrecleanIter, 3, \ 1897 "Maximum number of precleaning iteration passes") \ 1898 range(0, 9) \ 1899 \ 1900 product(uintx, CMSPrecleanDenominator, 3, \ 1901 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1902 "ratio") \ 1903 range(1, max_uintx) \ 1904 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \ 1905 \ 1906 product(uintx, CMSPrecleanNumerator, 2, \ 1907 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1908 "ratio") \ 1909 range(0, max_uintx-1) \ 1910 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \ 1911 \ 1912 product(bool, CMSPrecleanRefLists1, true, \ 1913 "Preclean ref lists during (initial) preclean phase") \ 1914 \ 1915 product(bool, CMSPrecleanRefLists2, false, \ 1916 "Preclean ref lists during abortable preclean phase") \ 1917 \ 1918 product(bool, CMSPrecleanSurvivors1, false, \ 1919 "Preclean survivors during (initial) preclean phase") \ 1920 \ 1921 product(bool, CMSPrecleanSurvivors2, true, \ 1922 "Preclean survivors during abortable preclean phase") \ 1923 \ 1924 product(uintx, CMSPrecleanThreshold, 1000, \ 1925 "Do not iterate again if number of dirty cards is less than this")\ 1926 range(100, max_uintx) \ 1927 \ 1928 product(bool, CMSCleanOnEnter, true, \ 1929 "Clean-on-enter optimization for reducing number of dirty cards") \ 1930 \ 1931 product(uintx, CMSRemarkVerifyVariant, 1, \ 1932 "Choose variant (1,2) of verification following remark") \ 1933 range(1, 2) \ 1934 \ 1935 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1936 "If Eden size is below this, do not try to schedule remark") \ 1937 range(0, max_uintx) \ 1938 \ 1939 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1940 "The Eden occupancy percentage (0-100) at which " \ 1941 "to try and schedule remark pause") \ 1942 range(0, 100) \ 1943 \ 1944 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1945 "Start sampling eden top at least before young gen " \ 1946 "occupancy reaches 1/<ratio> of the size at which " \ 1947 "we plan to schedule remark") \ 1948 range(1, max_uintx) \ 1949 \ 1950 product(uintx, CMSSamplingGrain, 16*K, \ 1951 "The minimum distance between eden samples for CMS (see above)") \ 1952 range(ObjectAlignmentInBytes, max_uintx) \ 1953 constraint(CMSSamplingGrainConstraintFunc,AfterMemoryInit) \ 1954 \ 1955 product(bool, CMSScavengeBeforeRemark, false, \ 1956 "Attempt scavenge before the CMS remark step") \ 1957 \ 1958 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1959 "Don't drain below this size per parallel worker/thief") \ 1960 range(1, max_juint) \ 1961 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \ 1962 \ 1963 manageable(intx, CMSWaitDuration, 2000, \ 1964 "Time in milliseconds that CMS thread waits for young GC") \ 1965 range(min_jint, max_jint) \ 1966 \ 1967 develop(uintx, CMSCheckInterval, 1000, \ 1968 "Interval in milliseconds that CMS thread checks if it " \ 1969 "should start a collection cycle") \ 1970 \ 1971 product(bool, CMSYield, true, \ 1972 "Yield between steps of CMS") \ 1973 \ 1974 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1975 "Bitmap operations should process at most this many bits " \ 1976 "between yields") \ 1977 range(1, max_uintx) \ 1978 constraint(CMSBitMapYieldQuantumConstraintFunc,AfterMemoryInit) \ 1979 \ 1980 product(bool, CMSPrintChunksInDump, false, \ 1981 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \ 1982 "trace level include more detailed information about the" \ 1983 "free chunks") \ 1984 \ 1985 product(bool, CMSPrintObjectsInDump, false, \ 1986 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \ 1987 "trace level include more detailed information about the" \ 1988 "allocated objects") \ 1989 \ 1990 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1991 "Verify that all references across the FLS boundary " \ 1992 "are to valid objects") \ 1993 \ 1994 diagnostic(bool, FLSVerifyLists, false, \ 1995 "Do lots of (expensive) FreeListSpace verification") \ 1996 \ 1997 diagnostic(bool, FLSVerifyIndexTable, false, \ 1998 "Do lots of (expensive) FLS index table verification") \ 1999 \ 2000 develop(bool, FLSVerifyDictionary, false, \ 2001 "Do lots of (expensive) FLS dictionary verification") \ 2002 \ 2003 develop(bool, VerifyBlockOffsetArray, false, \ 2004 "Do (expensive) block offset array verification") \ 2005 \ 2006 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 2007 "Maintain _unallocated_block in BlockOffsetArray " \ 2008 "(currently applicable only to CMS collector)") \ 2009 \ 2010 product(intx, RefDiscoveryPolicy, 0, \ 2011 "Select type of reference discovery policy: " \ 2012 "reference-based(0) or referent-based(1)") \ 2013 range(ReferenceProcessor::DiscoveryPolicyMin, \ 2014 ReferenceProcessor::DiscoveryPolicyMax) \ 2015 \ 2016 product(bool, ParallelRefProcEnabled, false, \ 2017 "Enable parallel reference processing whenever possible") \ 2018 \ 2019 product(bool, ParallelRefProcBalancingEnabled, true, \ 2020 "Enable balancing of reference processing queues") \ 2021 \ 2022 product(uintx, CMSTriggerRatio, 80, \ 2023 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 2024 "allocated before a CMS collection cycle commences") \ 2025 range(0, 100) \ 2026 \ 2027 product(uintx, CMSBootstrapOccupancy, 50, \ 2028 "Percentage CMS generation occupancy at which to " \ 2029 "initiate CMS collection for bootstrapping collection stats") \ 2030 range(0, 100) \ 2031 \ 2032 product(intx, CMSInitiatingOccupancyFraction, -1, \ 2033 "Percentage CMS generation occupancy to start a CMS collection " \ 2034 "cycle. A negative value means that CMSTriggerRatio is used") \ 2035 range(min_intx, 100) \ 2036 \ 2037 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 2038 "The percent occupancy (IHOP) of the current old generation " \ 2039 "capacity above which a concurrent mark cycle will be initiated " \ 2040 "Its value may change over time if adaptive IHOP is enabled, " \ 2041 "otherwise the value remains constant. " \ 2042 "In the latter case a value of 0 will result as frequent as " \ 2043 "possible concurrent marking cycles. A value of 100 disables " \ 2044 "concurrent marking. " \ 2045 "Fragmentation waste in the old generation is not considered " \ 2046 "free space in this calculation. (G1 collector only)") \ 2047 range(0, 100) \ 2048 \ 2049 manageable(intx, CMSTriggerInterval, -1, \ 2050 "Commence a CMS collection cycle (at least) every so many " \ 2051 "milliseconds (0 permanently, -1 disabled)") \ 2052 range(-1, max_intx) \ 2053 \ 2054 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2055 "Only use occupancy as a criterion for starting a CMS collection")\ 2056 \ 2057 product(uintx, CMSIsTooFullPercentage, 98, \ 2058 "An absolute ceiling above which CMS will always consider the " \ 2059 "unloading of classes when class unloading is enabled") \ 2060 range(0, 100) \ 2061 \ 2062 develop(bool, CMSTestInFreeList, false, \ 2063 "Check if the coalesced range is already in the " \ 2064 "free lists as claimed") \ 2065 \ 2066 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2067 "Check that all the garbage collected was returned to the " \ 2068 "free lists") \ 2069 \ 2070 notproduct(bool, ScavengeALot, false, \ 2071 "Force scavenge at every Nth exit from the runtime system " \ 2072 "(N=ScavengeALotInterval)") \ 2073 \ 2074 develop(bool, FullGCALot, false, \ 2075 "Force full gc at every Nth exit from the runtime system " \ 2076 "(N=FullGCALotInterval)") \ 2077 \ 2078 notproduct(bool, GCALotAtAllSafepoints, false, \ 2079 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2080 \ 2081 notproduct(bool, PromotionFailureALot, false, \ 2082 "Use promotion failure handling on every youngest generation " \ 2083 "collection") \ 2084 \ 2085 develop(uintx, PromotionFailureALotCount, 1000, \ 2086 "Number of promotion failures occurring at PLAB " \ 2087 "refill attempts (ParNew) or promotion attempts " \ 2088 "(other young collectors)") \ 2089 \ 2090 develop(uintx, PromotionFailureALotInterval, 5, \ 2091 "Total collections between promotion failures a lot") \ 2092 \ 2093 experimental(uintx, WorkStealingSleepMillis, 1, \ 2094 "Sleep time when sleep is used for yields") \ 2095 \ 2096 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2097 "Number of yields before a sleep is done during work stealing") \ 2098 \ 2099 experimental(uintx, WorkStealingHardSpins, 4096, \ 2100 "Number of iterations in a spin loop between checks on " \ 2101 "time out of hard spin") \ 2102 \ 2103 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2104 "Ratio of hard spins to calls to yield") \ 2105 \ 2106 develop(uintx, ObjArrayMarkingStride, 512, \ 2107 "Number of object array elements to push onto the marking stack " \ 2108 "before pushing a continuation entry") \ 2109 \ 2110 develop(bool, MetadataAllocationFailALot, false, \ 2111 "Fail metadata allocations at intervals controlled by " \ 2112 "MetadataAllocationFailALotInterval") \ 2113 \ 2114 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2115 "Metadata allocation failure a lot interval") \ 2116 \ 2117 notproduct(bool, ExecuteInternalVMTests, false, \ 2118 "Enable execution of internal VM tests") \ 2119 \ 2120 notproduct(bool, VerboseInternalVMTests, false, \ 2121 "Turn on logging for internal VM tests.") \ 2122 \ 2123 product(bool, ExecutingUnitTests, false, \ 2124 "Whether the JVM is running unit tests or not") \ 2125 \ 2126 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2127 \ 2128 product_pd(bool, ResizeTLAB, \ 2129 "Dynamically resize TLAB size for threads") \ 2130 \ 2131 product(bool, ZeroTLAB, false, \ 2132 "Zero out the newly created TLAB") \ 2133 \ 2134 product(bool, FastTLABRefill, true, \ 2135 "Use fast TLAB refill code") \ 2136 \ 2137 product(bool, TLABStats, true, \ 2138 "Provide more detailed and expensive TLAB statistics.") \ 2139 \ 2140 product_pd(bool, NeverActAsServerClassMachine, \ 2141 "Never act like a server-class machine") \ 2142 \ 2143 product(bool, AlwaysActAsServerClassMachine, false, \ 2144 "Always act like a server-class machine") \ 2145 \ 2146 product_pd(uint64_t, MaxRAM, \ 2147 "Real memory size (in bytes) used to set maximum heap size") \ 2148 range(0, 0XFFFFFFFFFFFFFFFF) \ 2149 \ 2150 product(size_t, ErgoHeapSizeLimit, 0, \ 2151 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2152 "MaxRAM / MaxRAMFraction") \ 2153 range(0, max_uintx) \ 2154 \ 2155 product(uintx, MaxRAMFraction, 4, \ 2156 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2157 "size") \ 2158 range(1, max_uintx) \ 2159 \ 2160 product(uintx, MinRAMFraction, 2, \ 2161 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2162 "size on systems with small physical memory size") \ 2163 range(1, max_uintx) \ 2164 \ 2165 product(uintx, InitialRAMFraction, 64, \ 2166 "Fraction (1/n) of real memory used for initial heap size") \ 2167 range(1, max_uintx) \ 2168 \ 2169 develop(uintx, MaxVirtMemFraction, 2, \ 2170 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2171 "determining maximum heap size") \ 2172 \ 2173 product(bool, UseAutoGCSelectPolicy, false, \ 2174 "Use automatic collection selection policy") \ 2175 \ 2176 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2177 "Automatic GC selection pause threshold in milliseconds") \ 2178 range(0, max_uintx) \ 2179 \ 2180 product(bool, UseAdaptiveSizePolicy, true, \ 2181 "Use adaptive generation sizing policies") \ 2182 \ 2183 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2184 "Use adaptive survivor sizing policies") \ 2185 \ 2186 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2187 "Use adaptive young-old sizing policies at minor collections") \ 2188 \ 2189 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2190 "Use adaptive young-old sizing policies at major collections") \ 2191 \ 2192 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2193 "Include statistics from System.gc() for adaptive size policy") \ 2194 \ 2195 product(bool, UseAdaptiveGCBoundary, false, \ 2196 "Allow young-old boundary to move") \ 2197 \ 2198 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2199 "Resize the virtual spaces of the young or old generations") \ 2200 range(-1, 1) \ 2201 \ 2202 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2203 "Policy for changing generation size for throughput goals") \ 2204 range(0, 1) \ 2205 \ 2206 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2207 "Number of steps where heuristics is used before data is used") \ 2208 range(0, max_uintx) \ 2209 \ 2210 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2211 "Number of collections before the adaptive sizing is started") \ 2212 \ 2213 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2214 "Collection interval for printing information; zero means never") \ 2215 range(0, max_uintx) \ 2216 \ 2217 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2218 "Use adaptive minimum footprint as a goal") \ 2219 \ 2220 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2221 "Weight given to exponential resizing, between 0 and 100") \ 2222 range(0, 100) \ 2223 \ 2224 product(uintx, AdaptiveTimeWeight, 25, \ 2225 "Weight given to time in adaptive policy, between 0 and 100") \ 2226 range(0, 100) \ 2227 \ 2228 product(uintx, PausePadding, 1, \ 2229 "How much buffer to keep for pause time") \ 2230 range(0, max_juint) \ 2231 \ 2232 product(uintx, PromotedPadding, 3, \ 2233 "How much buffer to keep for promotion failure") \ 2234 range(0, max_juint) \ 2235 \ 2236 product(uintx, SurvivorPadding, 3, \ 2237 "How much buffer to keep for survivor overflow") \ 2238 range(0, max_juint) \ 2239 \ 2240 product(uintx, ThresholdTolerance, 10, \ 2241 "Allowed collection cost difference between generations") \ 2242 range(0, 100) \ 2243 \ 2244 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2245 "If collection costs are within margin, reduce both by full " \ 2246 "delta") \ 2247 range(0, 100) \ 2248 \ 2249 product(uintx, YoungGenerationSizeIncrement, 20, \ 2250 "Adaptive size percentage change in young generation") \ 2251 range(0, 100) \ 2252 \ 2253 product(uintx, YoungGenerationSizeSupplement, 80, \ 2254 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2255 range(0, 100) \ 2256 \ 2257 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2258 "Decay factor to YoungedGenerationSizeSupplement") \ 2259 range(1, max_uintx) \ 2260 \ 2261 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2262 "Adaptive size percentage change in tenured generation") \ 2263 range(0, 100) \ 2264 \ 2265 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2266 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2267 range(0, 100) \ 2268 \ 2269 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2270 "Decay factor to TenuredGenerationSizeIncrement") \ 2271 range(1, max_uintx) \ 2272 \ 2273 product(uintx, MaxGCPauseMillis, max_uintx - 1, \ 2274 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2275 "or (G1 Only) the maximum GC time per MMU time slice") \ 2276 range(1, max_uintx - 1) \ 2277 constraint(MaxGCPauseMillisConstraintFunc,AfterErgo) \ 2278 \ 2279 product(uintx, GCPauseIntervalMillis, 0, \ 2280 "Time slice for MMU specification") \ 2281 constraint(GCPauseIntervalMillisConstraintFunc,AfterErgo) \ 2282 \ 2283 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2284 "Adaptive size policy maximum GC minor pause time goal " \ 2285 "in millisecond") \ 2286 range(0, max_uintx) \ 2287 \ 2288 product(uintx, GCTimeRatio, 99, \ 2289 "Adaptive size policy application time to GC time ratio") \ 2290 range(0, max_juint) \ 2291 \ 2292 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2293 "Adaptive size scale down factor for shrinking") \ 2294 range(1, max_uintx) \ 2295 \ 2296 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2297 "Adaptive size decays the major cost for long major intervals") \ 2298 \ 2299 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2300 "Time scale over which major costs decay") \ 2301 range(0, max_uintx) \ 2302 \ 2303 product(uintx, MinSurvivorRatio, 3, \ 2304 "Minimum ratio of young generation/survivor space size") \ 2305 range(3, max_uintx) \ 2306 \ 2307 product(uintx, InitialSurvivorRatio, 8, \ 2308 "Initial ratio of young generation/survivor space size") \ 2309 range(0, max_uintx) \ 2310 \ 2311 product(size_t, BaseFootPrintEstimate, 256*M, \ 2312 "Estimate of footprint other than Java Heap") \ 2313 range(0, max_uintx) \ 2314 \ 2315 product(bool, UseGCOverheadLimit, true, \ 2316 "Use policy to limit of proportion of time spent in GC " \ 2317 "before an OutOfMemory error is thrown") \ 2318 \ 2319 product(uintx, GCTimeLimit, 98, \ 2320 "Limit of the proportion of time spent in GC before " \ 2321 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2322 range(0, 100) \ 2323 \ 2324 product(uintx, GCHeapFreeLimit, 2, \ 2325 "Minimum percentage of free space after a full GC before an " \ 2326 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2327 range(0, 100) \ 2328 \ 2329 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2330 "Number of consecutive collections before gc time limit fires") \ 2331 range(1, max_uintx) \ 2332 \ 2333 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2334 "How far ahead to prefetch destination area (<= 0 means off)") \ 2335 range(-1, max_jint) \ 2336 \ 2337 product(intx, PrefetchScanIntervalInBytes, -1, \ 2338 "How far ahead to prefetch scan area (<= 0 means off)") \ 2339 range(-1, max_jint) \ 2340 \ 2341 product(intx, PrefetchFieldsAhead, -1, \ 2342 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2343 range(-1, max_jint) \ 2344 \ 2345 diagnostic(bool, VerifyDuringStartup, false, \ 2346 "Verify memory system before executing any Java code " \ 2347 "during VM initialization") \ 2348 \ 2349 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2350 "Verify system before exiting") \ 2351 \ 2352 diagnostic(bool, VerifyBeforeGC, false, \ 2353 "Verify memory system before GC") \ 2354 \ 2355 diagnostic(bool, VerifyAfterGC, false, \ 2356 "Verify memory system after GC") \ 2357 \ 2358 diagnostic(bool, VerifyDuringGC, false, \ 2359 "Verify memory system during GC (between phases)") \ 2360 \ 2361 diagnostic(ccstrlist, VerifySubSet, "", \ 2362 "Memory sub-systems to verify when Verify*GC flag(s) " \ 2363 "are enabled. One or more sub-systems can be specified " \ 2364 "in a comma separated string. Sub-systems are: " \ 2365 "threads, heap, symbol_table, string_table, codecache, " \ 2366 "dictionary, classloader_data_graph, metaspace, jni_handles, " \ 2367 "c-heap, codecache_oops") \ 2368 \ 2369 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2370 "Enable parallel memory system verification") \ 2371 \ 2372 diagnostic(bool, DeferInitialCardMark, false, \ 2373 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2374 "may arise from new_pre_store_barrier") \ 2375 \ 2376 product(bool, UseCondCardMark, false, \ 2377 "Check for already marked card before updating card table") \ 2378 \ 2379 diagnostic(bool, VerifyRememberedSets, false, \ 2380 "Verify GC remembered sets") \ 2381 \ 2382 diagnostic(bool, VerifyObjectStartArray, true, \ 2383 "Verify GC object start array if verify before/after") \ 2384 \ 2385 product(bool, DisableExplicitGC, false, \ 2386 "Ignore calls to System.gc()") \ 2387 \ 2388 notproduct(bool, CheckMemoryInitialization, false, \ 2389 "Check memory initialization") \ 2390 \ 2391 diagnostic(bool, BindCMSThreadToCPU, false, \ 2392 "Bind CMS Thread to CPU if possible") \ 2393 \ 2394 diagnostic(uintx, CPUForCMSThread, 0, \ 2395 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2396 range(0, max_juint) \ 2397 \ 2398 product(bool, BindGCTaskThreadsToCPUs, false, \ 2399 "Bind GCTaskThreads to CPUs if possible") \ 2400 \ 2401 product(bool, UseGCTaskAffinity, false, \ 2402 "Use worker affinity when asking for GCTasks") \ 2403 \ 2404 product(uintx, ProcessDistributionStride, 4, \ 2405 "Stride through processors when distributing processes") \ 2406 range(0, max_juint) \ 2407 \ 2408 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2409 "Number of times the coordinator GC thread will sleep while " \ 2410 "yielding before giving up and resuming GC") \ 2411 range(0, max_juint) \ 2412 \ 2413 product(uintx, CMSYieldSleepCount, 0, \ 2414 "Number of times a GC thread (minus the coordinator) " \ 2415 "will sleep while yielding before giving up and resuming GC") \ 2416 range(0, max_juint) \ 2417 \ 2418 product(bool, PrintGC, false, \ 2419 "Print message at garbage collection. " \ 2420 "Deprecated, use -Xlog:gc instead.") \ 2421 \ 2422 product(bool, PrintGCDetails, false, \ 2423 "Print more details at garbage collection. " \ 2424 "Deprecated, use -Xlog:gc* instead.") \ 2425 \ 2426 develop(intx, ConcGCYieldTimeout, 0, \ 2427 "If non-zero, assert that GC threads yield within this " \ 2428 "number of milliseconds") \ 2429 range(0, max_intx) \ 2430 \ 2431 develop(bool, TraceFinalizerRegistration, false, \ 2432 "Trace registration of final references") \ 2433 \ 2434 notproduct(bool, TraceScavenge, false, \ 2435 "Trace scavenge") \ 2436 \ 2437 product(bool, IgnoreEmptyClassPaths, false, \ 2438 "Ignore empty path elements in -classpath") \ 2439 \ 2440 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2441 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2442 "Initial size of the boot class loader data metaspace") \ 2443 range(30*K, max_uintx/BytesPerWord) \ 2444 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 2445 \ 2446 product(bool, TraceYoungGenTime, false, \ 2447 "Trace accumulated time for young collection") \ 2448 \ 2449 product(bool, TraceOldGenTime, false, \ 2450 "Trace accumulated time for old collection") \ 2451 \ 2452 product(bool, PrintHeapAtSIGBREAK, true, \ 2453 "Print heap layout in response to SIGBREAK") \ 2454 \ 2455 manageable(bool, PrintClassHistogram, false, \ 2456 "Print a histogram of class instances") \ 2457 \ 2458 develop(bool, TraceGCTaskManager, false, \ 2459 "Trace actions of the GC task manager") \ 2460 \ 2461 develop(bool, TraceGCTaskQueue, false, \ 2462 "Trace actions of the GC task queues") \ 2463 \ 2464 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2465 "Trace marking phase in ParallelOldGC") \ 2466 \ 2467 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2468 "Trace dense prefix computation for ParallelOldGC") \ 2469 \ 2470 develop(bool, IgnoreLibthreadGPFault, false, \ 2471 "Suppress workaround for libthread GP fault") \ 2472 \ 2473 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2474 "The percentage of the used heap that the instances of a class " \ 2475 "must occupy for the class to generate a trace event") \ 2476 range(0.0, 100.0) \ 2477 \ 2478 /* JVMTI heap profiling */ \ 2479 \ 2480 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2481 "Trace JVMTI object tagging calls") \ 2482 \ 2483 diagnostic(bool, VerifyBeforeIteration, false, \ 2484 "Verify memory system before JVMTI iteration") \ 2485 \ 2486 /* compiler interface */ \ 2487 \ 2488 develop(bool, CIPrintCompilerName, false, \ 2489 "when CIPrint is active, print the name of the active compiler") \ 2490 \ 2491 diagnostic(bool, CIPrintCompileQueue, false, \ 2492 "display the contents of the compile queue whenever a " \ 2493 "compilation is enqueued") \ 2494 \ 2495 develop(bool, CIPrintRequests, false, \ 2496 "display every request for compilation") \ 2497 \ 2498 product(bool, CITime, false, \ 2499 "collect timing information for compilation") \ 2500 \ 2501 develop(bool, CITimeVerbose, false, \ 2502 "be more verbose in compilation timings") \ 2503 \ 2504 develop(bool, CITimeEach, false, \ 2505 "display timing information after each successful compilation") \ 2506 \ 2507 develop(bool, CICountOSR, false, \ 2508 "use a separate counter when assigning ids to osr compilations") \ 2509 \ 2510 develop(bool, CICompileNatives, true, \ 2511 "compile native methods if supported by the compiler") \ 2512 \ 2513 develop_pd(bool, CICompileOSR, \ 2514 "compile on stack replacement methods if supported by the " \ 2515 "compiler") \ 2516 \ 2517 develop(bool, CIPrintMethodCodes, false, \ 2518 "print method bytecodes of the compiled code") \ 2519 \ 2520 develop(bool, CIPrintTypeFlow, false, \ 2521 "print the results of ciTypeFlow analysis") \ 2522 \ 2523 develop(bool, CITraceTypeFlow, false, \ 2524 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2525 \ 2526 develop(intx, OSROnlyBCI, -1, \ 2527 "OSR only at this bci. Negative values mean exclude that bci") \ 2528 \ 2529 /* compiler */ \ 2530 \ 2531 /* notice: the max range value here is max_jint, not max_intx */ \ 2532 /* because of overflow issue */ \ 2533 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2534 "Number of compiler threads to run") \ 2535 range(0, max_jint) \ 2536 constraint(CICompilerCountConstraintFunc, AtParse) \ 2537 \ 2538 product(intx, CompilationPolicyChoice, 0, \ 2539 "which compilation policy (0-3)") \ 2540 range(0, 3) \ 2541 \ 2542 develop(bool, UseStackBanging, true, \ 2543 "use stack banging for stack overflow checks (required for " \ 2544 "proper StackOverflow handling; disable only to measure cost " \ 2545 "of stackbanging)") \ 2546 \ 2547 develop(bool, UseStrictFP, true, \ 2548 "use strict fp if modifier strictfp is set") \ 2549 \ 2550 develop(bool, GenerateSynchronizationCode, true, \ 2551 "generate locking/unlocking code for synchronized methods and " \ 2552 "monitors") \ 2553 \ 2554 develop(bool, GenerateRangeChecks, true, \ 2555 "Generate range checks for array accesses") \ 2556 \ 2557 diagnostic_pd(bool, ImplicitNullChecks, \ 2558 "Generate code for implicit null checks") \ 2559 \ 2560 product_pd(bool, TrapBasedNullChecks, \ 2561 "Generate code for null checks that uses a cmp and trap " \ 2562 "instruction raising SIGTRAP. This is only used if an access to" \ 2563 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2564 "ImplicitNullChecks don't work (PPC64).") \ 2565 \ 2566 product(bool, PrintSafepointStatistics, false, \ 2567 "Print statistics about safepoint synchronization") \ 2568 \ 2569 product(intx, PrintSafepointStatisticsCount, 300, \ 2570 "Total number of safepoint statistics collected " \ 2571 "before printing them out") \ 2572 range(1, max_intx) \ 2573 \ 2574 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2575 "Print safepoint statistics only when safepoint takes " \ 2576 "more than PrintSafepointSatisticsTimeout in millis") \ 2577 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 2578 NOT_LP64(range(-1, max_intx)) \ 2579 \ 2580 product(bool, Inline, true, \ 2581 "Enable inlining") \ 2582 \ 2583 product(bool, ClipInlining, true, \ 2584 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2585 \ 2586 develop(bool, UseCHA, true, \ 2587 "Enable CHA") \ 2588 \ 2589 product(bool, UseTypeProfile, true, \ 2590 "Check interpreter profile for historically monomorphic calls") \ 2591 \ 2592 diagnostic(bool, PrintInlining, false, \ 2593 "Print inlining optimizations") \ 2594 \ 2595 product(bool, UsePopCountInstruction, false, \ 2596 "Use population count instruction") \ 2597 \ 2598 develop(bool, EagerInitialization, false, \ 2599 "Eagerly initialize classes if possible") \ 2600 \ 2601 diagnostic(bool, LogTouchedMethods, false, \ 2602 "Log methods which have been ever touched in runtime") \ 2603 \ 2604 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 2605 "Print all methods that have been ever touched in runtime") \ 2606 \ 2607 develop(bool, TraceMethodReplacement, false, \ 2608 "Print when methods are replaced do to recompilation") \ 2609 \ 2610 develop(bool, PrintMethodFlushing, false, \ 2611 "Print the nmethods being flushed") \ 2612 \ 2613 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2614 "print statistics about method flushing") \ 2615 \ 2616 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2617 "Number of compiled code invocations after which " \ 2618 "the method is considered as hot by the flusher") \ 2619 range(1, max_jint) \ 2620 \ 2621 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2622 "Minimum number of sweeper passes before an nmethod " \ 2623 "can be flushed") \ 2624 range(0, max_intx) \ 2625 \ 2626 product(bool, UseCodeAging, true, \ 2627 "Insert counter to detect warm methods") \ 2628 \ 2629 diagnostic(bool, StressCodeAging, false, \ 2630 "Start with counters compiled in") \ 2631 \ 2632 develop(bool, UseRelocIndex, false, \ 2633 "Use an index to speed random access to relocations") \ 2634 \ 2635 develop(bool, StressCodeBuffers, false, \ 2636 "Exercise code buffer expansion and other rare state changes") \ 2637 \ 2638 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2639 "Generate extra debugging information for non-safepoints in " \ 2640 "nmethods") \ 2641 \ 2642 product(bool, PrintVMOptions, false, \ 2643 "Print flags that appeared on the command line") \ 2644 \ 2645 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2646 "Ignore unrecognized VM options") \ 2647 \ 2648 product(bool, PrintCommandLineFlags, false, \ 2649 "Print flags specified on command line or set by ergonomics") \ 2650 \ 2651 product(bool, PrintFlagsInitial, false, \ 2652 "Print all VM flags before argument processing and exit VM") \ 2653 \ 2654 product(bool, PrintFlagsFinal, false, \ 2655 "Print all VM flags after argument and ergonomic processing") \ 2656 \ 2657 notproduct(bool, PrintFlagsWithComments, false, \ 2658 "Print all VM flags with default values and descriptions and " \ 2659 "exit") \ 2660 \ 2661 product(bool, PrintFlagsRanges, false, \ 2662 "Print VM flags and their ranges and exit VM") \ 2663 \ 2664 diagnostic(bool, SerializeVMOutput, true, \ 2665 "Use a mutex to serialize output to tty and LogFile") \ 2666 \ 2667 diagnostic(bool, DisplayVMOutput, true, \ 2668 "Display all VM output on the tty, independently of LogVMOutput") \ 2669 \ 2670 diagnostic(bool, LogVMOutput, false, \ 2671 "Save VM output to LogFile") \ 2672 \ 2673 diagnostic(ccstr, LogFile, NULL, \ 2674 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2675 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2676 \ 2677 product(ccstr, ErrorFile, NULL, \ 2678 "If an error occurs, save the error data to this file " \ 2679 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2680 \ 2681 product(bool, DisplayVMOutputToStderr, false, \ 2682 "If DisplayVMOutput is true, display all VM output to stderr") \ 2683 \ 2684 product(bool, DisplayVMOutputToStdout, false, \ 2685 "If DisplayVMOutput is true, display all VM output to stdout") \ 2686 \ 2687 product(bool, UseHeavyMonitors, false, \ 2688 "use heavyweight instead of lightweight Java monitors") \ 2689 \ 2690 product(bool, PrintStringTableStatistics, false, \ 2691 "print statistics about the StringTable and SymbolTable") \ 2692 \ 2693 diagnostic(bool, VerifyStringTableAtExit, false, \ 2694 "verify StringTable contents at exit") \ 2695 \ 2696 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2697 "print histogram of the symbol table") \ 2698 \ 2699 notproduct(bool, ExitVMOnVerifyError, false, \ 2700 "standard exit from VM if bytecode verify error " \ 2701 "(only in debug mode)") \ 2702 \ 2703 diagnostic(ccstr, AbortVMOnException, NULL, \ 2704 "Call fatal if this exception is thrown. Example: " \ 2705 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2706 \ 2707 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 2708 "Call fatal if the exception pointed by AbortVMOnException " \ 2709 "has this message") \ 2710 \ 2711 develop(bool, DebugVtables, false, \ 2712 "add debugging code to vtable dispatch") \ 2713 \ 2714 notproduct(bool, PrintVtableStats, false, \ 2715 "print vtables stats at end of run") \ 2716 \ 2717 develop(bool, TraceCreateZombies, false, \ 2718 "trace creation of zombie nmethods") \ 2719 \ 2720 notproduct(bool, IgnoreLockingAssertions, false, \ 2721 "disable locking assertions (for speed)") \ 2722 \ 2723 product(bool, RangeCheckElimination, true, \ 2724 "Eliminate range checks") \ 2725 \ 2726 develop_pd(bool, UncommonNullCast, \ 2727 "track occurrences of null in casts; adjust compiler tactics") \ 2728 \ 2729 develop(bool, TypeProfileCasts, true, \ 2730 "treat casts like calls for purposes of type profiling") \ 2731 \ 2732 develop(bool, DelayCompilationDuringStartup, true, \ 2733 "Delay invoking the compiler until main application class is " \ 2734 "loaded") \ 2735 \ 2736 develop(bool, CompileTheWorld, false, \ 2737 "Compile all methods in all classes in bootstrap class path " \ 2738 "(stress test)") \ 2739 \ 2740 develop(bool, CompileTheWorldPreloadClasses, true, \ 2741 "Preload all classes used by a class before start loading") \ 2742 \ 2743 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2744 "Force a safepoint every n compiles so sweeper can keep up") \ 2745 \ 2746 develop(bool, FillDelaySlots, true, \ 2747 "Fill delay slots (on SPARC only)") \ 2748 \ 2749 develop(bool, TimeLivenessAnalysis, false, \ 2750 "Time computation of bytecode liveness analysis") \ 2751 \ 2752 develop(bool, TraceLivenessGen, false, \ 2753 "Trace the generation of liveness analysis information") \ 2754 \ 2755 notproduct(bool, TraceLivenessQuery, false, \ 2756 "Trace queries of liveness analysis information") \ 2757 \ 2758 notproduct(bool, CollectIndexSetStatistics, false, \ 2759 "Collect information about IndexSets") \ 2760 \ 2761 develop(bool, UseLoopSafepoints, true, \ 2762 "Generate Safepoint nodes in every loop") \ 2763 \ 2764 develop(intx, FastAllocateSizeLimit, 128*K, \ 2765 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2766 "Inline allocations larger than this in doublewords must go slow")\ 2767 \ 2768 product(bool, AggressiveOpts, false, \ 2769 "Enable aggressive optimizations - see arguments.cpp") \ 2770 \ 2771 product_pd(bool, CompactStrings, \ 2772 "Enable Strings to use single byte chars in backing store") \ 2773 \ 2774 product_pd(uintx, TypeProfileLevel, \ 2775 "=XYZ, with Z: Type profiling of arguments at call; " \ 2776 "Y: Type profiling of return value at call; " \ 2777 "X: Type profiling of parameters to methods; " \ 2778 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2779 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 2780 \ 2781 product(intx, TypeProfileArgsLimit, 2, \ 2782 "max number of call arguments to consider for type profiling") \ 2783 range(0, 16) \ 2784 \ 2785 product(intx, TypeProfileParmsLimit, 2, \ 2786 "max number of incoming parameters to consider for type profiling"\ 2787 ", -1 for all") \ 2788 range(-1, 64) \ 2789 \ 2790 /* statistics */ \ 2791 develop(bool, CountCompiledCalls, false, \ 2792 "Count method invocations") \ 2793 \ 2794 notproduct(bool, CountRuntimeCalls, false, \ 2795 "Count VM runtime calls") \ 2796 \ 2797 develop(bool, CountJNICalls, false, \ 2798 "Count jni method invocations") \ 2799 \ 2800 notproduct(bool, CountJVMCalls, false, \ 2801 "Count jvm method invocations") \ 2802 \ 2803 notproduct(bool, CountRemovableExceptions, false, \ 2804 "Count exceptions that could be replaced by branches due to " \ 2805 "inlining") \ 2806 \ 2807 notproduct(bool, ICMissHistogram, false, \ 2808 "Produce histogram of IC misses") \ 2809 \ 2810 /* interpreter */ \ 2811 product_pd(bool, RewriteBytecodes, \ 2812 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2813 \ 2814 product_pd(bool, RewriteFrequentPairs, \ 2815 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2816 \ 2817 diagnostic(bool, PrintInterpreter, false, \ 2818 "Print the generated interpreter code") \ 2819 \ 2820 product(bool, UseInterpreter, true, \ 2821 "Use interpreter for non-compiled methods") \ 2822 \ 2823 develop(bool, UseFastSignatureHandlers, true, \ 2824 "Use fast signature handlers for native calls") \ 2825 \ 2826 product(bool, UseLoopCounter, true, \ 2827 "Increment invocation counter on backward branch") \ 2828 \ 2829 product_pd(bool, UseOnStackReplacement, \ 2830 "Use on stack replacement, calls runtime if invoc. counter " \ 2831 "overflows in loop") \ 2832 \ 2833 notproduct(bool, TraceOnStackReplacement, false, \ 2834 "Trace on stack replacement") \ 2835 \ 2836 product_pd(bool, PreferInterpreterNativeStubs, \ 2837 "Use always interpreter stubs for native methods invoked via " \ 2838 "interpreter") \ 2839 \ 2840 develop(bool, CountBytecodes, false, \ 2841 "Count number of bytecodes executed") \ 2842 \ 2843 develop(bool, PrintBytecodeHistogram, false, \ 2844 "Print histogram of the executed bytecodes") \ 2845 \ 2846 develop(bool, PrintBytecodePairHistogram, false, \ 2847 "Print histogram of the executed bytecode pairs") \ 2848 \ 2849 diagnostic(bool, PrintSignatureHandlers, false, \ 2850 "Print code generated for native method signature handlers") \ 2851 \ 2852 develop(bool, VerifyOops, false, \ 2853 "Do plausibility checks for oops") \ 2854 \ 2855 develop(bool, CheckUnhandledOops, false, \ 2856 "Check for unhandled oops in VM code") \ 2857 \ 2858 develop(bool, VerifyJNIFields, trueInDebug, \ 2859 "Verify jfieldIDs for instance fields") \ 2860 \ 2861 notproduct(bool, VerifyJNIEnvThread, false, \ 2862 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2863 "from JNI") \ 2864 \ 2865 develop(bool, VerifyFPU, false, \ 2866 "Verify FPU state (check for NaN's, etc.)") \ 2867 \ 2868 develop(bool, VerifyThread, false, \ 2869 "Watch the thread register for corruption (SPARC only)") \ 2870 \ 2871 develop(bool, VerifyActivationFrameSize, false, \ 2872 "Verify that activation frame didn't become smaller than its " \ 2873 "minimal size") \ 2874 \ 2875 develop(bool, TraceFrequencyInlining, false, \ 2876 "Trace frequency based inlining") \ 2877 \ 2878 develop_pd(bool, InlineIntrinsics, \ 2879 "Inline intrinsics that can be statically resolved") \ 2880 \ 2881 product_pd(bool, ProfileInterpreter, \ 2882 "Profile at the bytecode level during interpretation") \ 2883 \ 2884 develop(bool, TraceProfileInterpreter, false, \ 2885 "Trace profiling at the bytecode level during interpretation. " \ 2886 "This outputs the profiling information collected to improve " \ 2887 "jit compilation.") \ 2888 \ 2889 develop_pd(bool, ProfileTraps, \ 2890 "Profile deoptimization traps at the bytecode level") \ 2891 \ 2892 product(intx, ProfileMaturityPercentage, 20, \ 2893 "number of method invocations/branches (expressed as % of " \ 2894 "CompileThreshold) before using the method's profile") \ 2895 range(0, 100) \ 2896 \ 2897 diagnostic(bool, PrintMethodData, false, \ 2898 "Print the results of +ProfileInterpreter at end of run") \ 2899 \ 2900 develop(bool, VerifyDataPointer, trueInDebug, \ 2901 "Verify the method data pointer during interpreter profiling") \ 2902 \ 2903 develop(bool, VerifyCompiledCode, false, \ 2904 "Include miscellaneous runtime verifications in nmethod code; " \ 2905 "default off because it disturbs nmethod size heuristics") \ 2906 \ 2907 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2908 "Manually make GC thread crash then dump java stack trace; " \ 2909 "Test only") \ 2910 \ 2911 /* compilation */ \ 2912 product(bool, UseCompiler, true, \ 2913 "Use Just-In-Time compilation") \ 2914 \ 2915 develop(bool, TraceCompilationPolicy, false, \ 2916 "Trace compilation policy") \ 2917 \ 2918 develop(bool, TimeCompilationPolicy, false, \ 2919 "Time the compilation policy") \ 2920 \ 2921 product(bool, UseCounterDecay, true, \ 2922 "Adjust recompilation counters") \ 2923 \ 2924 develop(intx, CounterHalfLifeTime, 30, \ 2925 "Half-life time of invocation counters (in seconds)") \ 2926 \ 2927 develop(intx, CounterDecayMinIntervalLength, 500, \ 2928 "The minimum interval (in milliseconds) between invocation of " \ 2929 "CounterDecay") \ 2930 \ 2931 product(bool, AlwaysCompileLoopMethods, false, \ 2932 "When using recompilation, never interpret methods " \ 2933 "containing loops") \ 2934 \ 2935 product(bool, DontCompileHugeMethods, true, \ 2936 "Do not compile methods > HugeMethodLimit") \ 2937 \ 2938 /* Bytecode escape analysis estimation. */ \ 2939 product(bool, EstimateArgEscape, true, \ 2940 "Analyze bytecodes to estimate escape state of arguments") \ 2941 \ 2942 product(intx, BCEATraceLevel, 0, \ 2943 "How much tracing to do of bytecode escape analysis estimates " \ 2944 "(0-3)") \ 2945 range(0, 3) \ 2946 \ 2947 product(intx, MaxBCEAEstimateLevel, 5, \ 2948 "Maximum number of nested calls that are analyzed by BC EA") \ 2949 range(0, max_jint) \ 2950 \ 2951 product(intx, MaxBCEAEstimateSize, 150, \ 2952 "Maximum bytecode size of a method to be analyzed by BC EA") \ 2953 range(0, max_jint) \ 2954 \ 2955 product(intx, AllocatePrefetchStyle, 1, \ 2956 "0 = no prefetch, " \ 2957 "1 = generate prefetch instructions for each allocation, " \ 2958 "2 = use TLAB watermark to gate allocation prefetch, " \ 2959 "3 = generate one prefetch instruction per cache line") \ 2960 range(0, 3) \ 2961 \ 2962 product(intx, AllocatePrefetchDistance, -1, \ 2963 "Distance to prefetch ahead of allocation pointer. " \ 2964 "-1: use system-specific value (automatically determined") \ 2965 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 2966 \ 2967 product(intx, AllocatePrefetchLines, 3, \ 2968 "Number of lines to prefetch ahead of array allocation pointer") \ 2969 range(1, 64) \ 2970 \ 2971 product(intx, AllocateInstancePrefetchLines, 1, \ 2972 "Number of lines to prefetch ahead of instance allocation " \ 2973 "pointer") \ 2974 range(1, 64) \ 2975 \ 2976 product(intx, AllocatePrefetchStepSize, 16, \ 2977 "Step size in bytes of sequential prefetch instructions") \ 2978 range(1, 512) \ 2979 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 2980 \ 2981 product(intx, AllocatePrefetchInstr, 0, \ 2982 "Select instruction to prefetch ahead of allocation pointer") \ 2983 constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit) \ 2984 \ 2985 /* deoptimization */ \ 2986 develop(bool, TraceDeoptimization, false, \ 2987 "Trace deoptimization") \ 2988 \ 2989 develop(bool, PrintDeoptimizationDetails, false, \ 2990 "Print more information about deoptimization") \ 2991 \ 2992 develop(bool, DebugDeoptimization, false, \ 2993 "Tracing various information while debugging deoptimization") \ 2994 \ 2995 product(intx, SelfDestructTimer, 0, \ 2996 "Will cause VM to terminate after a given time (in minutes) " \ 2997 "(0 means off)") \ 2998 range(0, max_intx) \ 2999 \ 3000 product(intx, MaxJavaStackTraceDepth, 1024, \ 3001 "The maximum number of lines in the stack trace for Java " \ 3002 "exceptions (0 means all)") \ 3003 range(0, max_jint/2) \ 3004 \ 3005 develop(bool, TraceStackWalk, false, \ 3006 "Trace stack walking") \ 3007 \ 3008 /* notice: the max range value here is max_jint, not max_intx */ \ 3009 /* because of overflow issue */ \ 3010 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 3011 "Guarantee a safepoint (at least) every so many milliseconds " \ 3012 "(0 means none)")) \ 3013 NOT_EMBEDDED(range(0, max_jint)) \ 3014 \ 3015 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 3016 "Guarantee a safepoint (at least) every so many milliseconds " \ 3017 "(0 means none)")) \ 3018 EMBEDDED_ONLY(range(0, max_jint)) \ 3019 \ 3020 product(intx, SafepointTimeoutDelay, 10000, \ 3021 "Delay in milliseconds for option SafepointTimeout") \ 3022 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 3023 NOT_LP64(range(0, max_intx)) \ 3024 \ 3025 product(intx, NmethodSweepActivity, 10, \ 3026 "Removes cold nmethods from code cache if > 0. Higher values " \ 3027 "result in more aggressive sweeping") \ 3028 range(0, 2000) \ 3029 \ 3030 notproduct(bool, LogSweeper, false, \ 3031 "Keep a ring buffer of sweeper activity") \ 3032 \ 3033 notproduct(intx, SweeperLogEntries, 1024, \ 3034 "Number of records in the ring buffer of sweeper activity") \ 3035 \ 3036 notproduct(intx, MemProfilingInterval, 500, \ 3037 "Time between each invocation of the MemProfiler") \ 3038 \ 3039 develop(intx, MallocCatchPtr, -1, \ 3040 "Hit breakpoint when mallocing/freeing this pointer") \ 3041 \ 3042 notproduct(ccstrlist, SuppressErrorAt, "", \ 3043 "List of assertions (file:line) to muzzle") \ 3044 \ 3045 develop(intx, StackPrintLimit, 100, \ 3046 "number of stack frames to print in VM-level stack dump") \ 3047 \ 3048 notproduct(intx, MaxElementPrintSize, 256, \ 3049 "maximum number of elements to print") \ 3050 \ 3051 notproduct(intx, MaxSubklassPrintSize, 4, \ 3052 "maximum number of subklasses to print when printing klass") \ 3053 \ 3054 product(intx, MaxInlineLevel, 9, \ 3055 "maximum number of nested calls that are inlined") \ 3056 range(0, max_jint) \ 3057 \ 3058 product(intx, MaxRecursiveInlineLevel, 1, \ 3059 "maximum number of nested recursive calls that are inlined") \ 3060 range(0, max_jint) \ 3061 \ 3062 develop(intx, MaxForceInlineLevel, 100, \ 3063 "maximum number of nested calls that are forced for inlining " \ 3064 "(using CompileCommand or marked w/ @ForceInline)") \ 3065 range(0, max_jint) \ 3066 \ 3067 product_pd(intx, InlineSmallCode, \ 3068 "Only inline already compiled methods if their code size is " \ 3069 "less than this") \ 3070 range(0, max_jint) \ 3071 \ 3072 product(intx, MaxInlineSize, 35, \ 3073 "The maximum bytecode size of a method to be inlined") \ 3074 range(0, max_jint) \ 3075 \ 3076 product_pd(intx, FreqInlineSize, \ 3077 "The maximum bytecode size of a frequent method to be inlined") \ 3078 range(0, max_jint) \ 3079 \ 3080 product(intx, MaxTrivialSize, 6, \ 3081 "The maximum bytecode size of a trivial method to be inlined") \ 3082 range(0, max_jint) \ 3083 \ 3084 product(intx, MinInliningThreshold, 250, \ 3085 "The minimum invocation count a method needs to have to be " \ 3086 "inlined") \ 3087 range(0, max_jint) \ 3088 \ 3089 develop(intx, MethodHistogramCutoff, 100, \ 3090 "The cutoff value for method invocation histogram (+CountCalls)") \ 3091 \ 3092 diagnostic(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3093 "Number of interpreted methods to show in profile") \ 3094 \ 3095 diagnostic(intx, ProfilerNumberOfCompiledMethods, 25, \ 3096 "Number of compiled methods to show in profile") \ 3097 \ 3098 diagnostic(intx, ProfilerNumberOfStubMethods, 25, \ 3099 "Number of stub methods to show in profile") \ 3100 \ 3101 diagnostic(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3102 "Number of runtime stub nodes to show in profile") \ 3103 \ 3104 product(intx, ProfileIntervalsTicks, 100, \ 3105 "Number of ticks between printing of interval profile " \ 3106 "(+ProfileIntervals)") \ 3107 range(0, max_intx) \ 3108 \ 3109 notproduct(intx, ScavengeALotInterval, 1, \ 3110 "Interval between which scavenge will occur with +ScavengeALot") \ 3111 \ 3112 notproduct(intx, FullGCALotInterval, 1, \ 3113 "Interval between which full gc will occur with +FullGCALot") \ 3114 \ 3115 notproduct(intx, FullGCALotStart, 0, \ 3116 "For which invocation to start FullGCAlot") \ 3117 \ 3118 notproduct(intx, FullGCALotDummies, 32*K, \ 3119 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3120 "to move") \ 3121 \ 3122 develop(intx, DontYieldALotInterval, 10, \ 3123 "Interval between which yields will be dropped (milliseconds)") \ 3124 \ 3125 develop(intx, MinSleepInterval, 1, \ 3126 "Minimum sleep() interval (milliseconds) when " \ 3127 "ConvertSleepToYield is off (used for Solaris)") \ 3128 \ 3129 develop(intx, ProfilerPCTickThreshold, 15, \ 3130 "Number of ticks in a PC buckets to be a hotspot") \ 3131 \ 3132 notproduct(intx, DeoptimizeALotInterval, 5, \ 3133 "Number of exits until DeoptimizeALot kicks in") \ 3134 \ 3135 notproduct(intx, ZombieALotInterval, 5, \ 3136 "Number of exits until ZombieALot kicks in") \ 3137 \ 3138 diagnostic(intx, MallocVerifyInterval, 0, \ 3139 "If non-zero, verify C heap after every N calls to " \ 3140 "malloc/realloc/free") \ 3141 range(0, max_intx) \ 3142 \ 3143 diagnostic(intx, MallocVerifyStart, 0, \ 3144 "If non-zero, start verifying C heap after Nth call to " \ 3145 "malloc/realloc/free") \ 3146 range(0, max_intx) \ 3147 \ 3148 diagnostic(uintx, MallocMaxTestWords, 0, \ 3149 "If non-zero, maximum number of words that malloc/realloc can " \ 3150 "allocate (for testing only)") \ 3151 range(0, max_uintx) \ 3152 \ 3153 product(intx, TypeProfileWidth, 2, \ 3154 "Number of receiver types to record in call/cast profile") \ 3155 range(0, 8) \ 3156 \ 3157 experimental(intx, MethodProfileWidth, 0, \ 3158 "Number of methods to record in call profile") \ 3159 \ 3160 develop(intx, BciProfileWidth, 2, \ 3161 "Number of return bci's to record in ret profile") \ 3162 \ 3163 product(intx, PerMethodRecompilationCutoff, 400, \ 3164 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3165 range(-1, max_intx) \ 3166 \ 3167 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3168 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3169 range(-1, max_intx) \ 3170 \ 3171 product(intx, PerMethodTrapLimit, 100, \ 3172 "Limit on traps (of one kind) in a method (includes inlines)") \ 3173 range(0, max_jint) \ 3174 \ 3175 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3176 "Limit on speculative traps (of one kind) in a method " \ 3177 "(includes inlines)") \ 3178 range(0, max_jint) \ 3179 \ 3180 product(intx, PerBytecodeTrapLimit, 4, \ 3181 "Limit on traps (of one kind) at a particular BCI") \ 3182 range(0, max_jint) \ 3183 \ 3184 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3185 "Extra method data trap entries for speculation") \ 3186 \ 3187 develop(intx, InlineFrequencyRatio, 20, \ 3188 "Ratio of call site execution to caller method invocation") \ 3189 range(0, max_jint) \ 3190 \ 3191 diagnostic_pd(intx, InlineFrequencyCount, \ 3192 "Count of call site execution necessary to trigger frequent " \ 3193 "inlining") \ 3194 range(0, max_jint) \ 3195 \ 3196 develop(intx, InlineThrowCount, 50, \ 3197 "Force inlining of interpreted methods that throw this often") \ 3198 range(0, max_jint) \ 3199 \ 3200 develop(intx, InlineThrowMaxSize, 200, \ 3201 "Force inlining of throwing methods smaller than this") \ 3202 range(0, max_jint) \ 3203 \ 3204 develop(intx, ProfilerNodeSize, 1024, \ 3205 "Size in K to allocate for the Profile Nodes of each thread") \ 3206 range(0, 1024) \ 3207 \ 3208 /* gc parameters */ \ 3209 product(size_t, InitialHeapSize, 0, \ 3210 "Initial heap size (in bytes); zero means use ergonomics") \ 3211 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \ 3212 \ 3213 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3214 "Maximum heap size (in bytes)") \ 3215 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \ 3216 \ 3217 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3218 "Initial tenured generation size (in bytes)") \ 3219 range(0, max_uintx) \ 3220 \ 3221 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3222 "Initial new generation size (in bytes)") \ 3223 constraint(NewSizeConstraintFunc,AfterErgo) \ 3224 \ 3225 product(size_t, MaxNewSize, max_uintx, \ 3226 "Maximum new generation size (in bytes), max_uintx means set " \ 3227 "ergonomically") \ 3228 range(0, max_uintx) \ 3229 \ 3230 product_pd(size_t, HeapBaseMinAddress, \ 3231 "OS specific low limit for heap base address") \ 3232 constraint(HeapBaseMinAddressConstraintFunc,AfterErgo) \ 3233 \ 3234 product(size_t, PretenureSizeThreshold, 0, \ 3235 "Maximum size in bytes of objects allocated in DefNew " \ 3236 "generation; zero means no maximum") \ 3237 range(0, max_uintx) \ 3238 \ 3239 product(size_t, MinTLABSize, 2*K, \ 3240 "Minimum allowed TLAB size (in bytes)") \ 3241 range(1, max_uintx/2) \ 3242 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \ 3243 \ 3244 product(size_t, TLABSize, 0, \ 3245 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3246 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \ 3247 \ 3248 product(size_t, YoungPLABSize, 4096, \ 3249 "Size of young gen promotion LAB's (in HeapWords)") \ 3250 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \ 3251 \ 3252 product(size_t, OldPLABSize, 1024, \ 3253 "Size of old gen promotion LAB's (in HeapWords), or Number " \ 3254 "of blocks to attempt to claim when refilling CMS LAB's") \ 3255 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \ 3256 \ 3257 product(uintx, TLABAllocationWeight, 35, \ 3258 "Allocation averaging weight") \ 3259 range(0, 100) \ 3260 \ 3261 /* Limit the lower bound of this flag to 1 as it is used */ \ 3262 /* in a division expression. */ \ 3263 product(uintx, TLABWasteTargetPercent, 1, \ 3264 "Percentage of Eden that can be wasted") \ 3265 range(1, 100) \ 3266 \ 3267 product(uintx, TLABRefillWasteFraction, 64, \ 3268 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3269 range(1, max_juint) \ 3270 \ 3271 product(uintx, TLABWasteIncrement, 4, \ 3272 "Increment allowed waste at slow allocation") \ 3273 range(0, max_jint) \ 3274 constraint(TLABWasteIncrementConstraintFunc,AfterMemoryInit) \ 3275 \ 3276 product(uintx, SurvivorRatio, 8, \ 3277 "Ratio of eden/survivor space size") \ 3278 range(1, max_uintx-2) \ 3279 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \ 3280 \ 3281 product(uintx, NewRatio, 2, \ 3282 "Ratio of old/new generation sizes") \ 3283 range(0, max_uintx-1) \ 3284 \ 3285 product_pd(size_t, NewSizeThreadIncrease, \ 3286 "Additional size added to desired new generation size per " \ 3287 "non-daemon thread (in bytes)") \ 3288 range(0, max_uintx) \ 3289 \ 3290 product_pd(size_t, MetaspaceSize, \ 3291 "Initial threshold (in bytes) at which a garbage collection " \ 3292 "is done to reduce Metaspace usage") \ 3293 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 3294 \ 3295 product(size_t, MaxMetaspaceSize, max_uintx, \ 3296 "Maximum size of Metaspaces (in bytes)") \ 3297 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 3298 \ 3299 product(size_t, CompressedClassSpaceSize, 1*G, \ 3300 "Maximum size of class area in Metaspace when compressed " \ 3301 "class pointers are used") \ 3302 range(1*M, 3*G) \ 3303 \ 3304 manageable(uintx, MinHeapFreeRatio, 40, \ 3305 "The minimum percentage of heap free after GC to avoid expansion."\ 3306 " For most GCs this applies to the old generation. In G1 and" \ 3307 " ParallelGC it applies to the whole heap.") \ 3308 range(0, 100) \ 3309 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 3310 \ 3311 manageable(uintx, MaxHeapFreeRatio, 70, \ 3312 "The maximum percentage of heap free after GC to avoid shrinking."\ 3313 " For most GCs this applies to the old generation. In G1 and" \ 3314 " ParallelGC it applies to the whole heap.") \ 3315 range(0, 100) \ 3316 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 3317 \ 3318 product(bool, ShrinkHeapInSteps, true, \ 3319 "When disabled, informs the GC to shrink the java heap directly" \ 3320 " to the target size at the next full GC rather than requiring" \ 3321 " smaller steps during multiple full GCs.") \ 3322 \ 3323 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3324 "Number of milliseconds per MB of free space in the heap") \ 3325 range(0, max_intx) \ 3326 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 3327 \ 3328 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3329 "The minimum change in heap space due to GC (in bytes)") \ 3330 range(0, max_uintx) \ 3331 \ 3332 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3333 "The minimum expansion of Metaspace (in bytes)") \ 3334 range(0, max_uintx) \ 3335 \ 3336 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3337 "The maximum percentage of Metaspace free after GC to avoid " \ 3338 "shrinking") \ 3339 range(0, 100) \ 3340 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3341 \ 3342 product(uintx, MinMetaspaceFreeRatio, 40, \ 3343 "The minimum percentage of Metaspace free after GC to avoid " \ 3344 "expansion") \ 3345 range(0, 99) \ 3346 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3347 \ 3348 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3349 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3350 range(0, max_uintx) \ 3351 \ 3352 product(uintx, QueuedAllocationWarningCount, 0, \ 3353 "Number of times an allocation that queues behind a GC " \ 3354 "will retry before printing a warning") \ 3355 range(0, max_uintx) \ 3356 \ 3357 diagnostic(uintx, VerifyGCStartAt, 0, \ 3358 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3359 range(0, max_uintx) \ 3360 \ 3361 diagnostic(intx, VerifyGCLevel, 0, \ 3362 "Generation level at which to start +VerifyBefore/AfterGC") \ 3363 range(0, 1) \ 3364 \ 3365 product(uintx, MaxTenuringThreshold, 15, \ 3366 "Maximum value for tenuring threshold") \ 3367 range(0, markOopDesc::max_age + 1) \ 3368 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \ 3369 \ 3370 product(uintx, InitialTenuringThreshold, 7, \ 3371 "Initial value for tenuring threshold") \ 3372 range(0, markOopDesc::max_age + 1) \ 3373 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \ 3374 \ 3375 product(uintx, TargetSurvivorRatio, 50, \ 3376 "Desired percentage of survivor space used after scavenge") \ 3377 range(0, 100) \ 3378 \ 3379 product(uintx, MarkSweepDeadRatio, 5, \ 3380 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3381 "Serial mark sweep treats this as both the minimum and maximum " \ 3382 "value. " \ 3383 "CMS uses this value only if it falls back to mark sweep. " \ 3384 "Par compact uses a variable scale based on the density of the " \ 3385 "generation and treats this as the maximum value when the heap " \ 3386 "is either completely full or completely empty. Par compact " \ 3387 "also has a smaller default value; see arguments.cpp.") \ 3388 range(0, 100) \ 3389 \ 3390 product(uint, MarkSweepAlwaysCompactCount, 4, \ 3391 "How often should we fully compact the heap (ignoring the dead " \ 3392 "space parameters)") \ 3393 range(1, max_juint) \ 3394 \ 3395 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3396 "Delay between expansion and allocation (in milliseconds)") \ 3397 \ 3398 develop(uintx, GCWorkerDelayMillis, 0, \ 3399 "Delay in scheduling GC workers (in milliseconds)") \ 3400 \ 3401 product(intx, DeferThrSuspendLoopCount, 4000, \ 3402 "(Unstable) Number of times to iterate in safepoint loop " \ 3403 "before blocking VM threads ") \ 3404 range(-1, max_jint-1) \ 3405 \ 3406 product(intx, DeferPollingPageLoopCount, -1, \ 3407 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3408 "before changing safepoint polling page to RO ") \ 3409 range(-1, max_jint-1) \ 3410 \ 3411 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3412 range(0, max_intx) \ 3413 \ 3414 product(bool, PSChunkLargeArrays, true, \ 3415 "Process large arrays in chunks") \ 3416 \ 3417 product(uintx, GCDrainStackTargetSize, 64, \ 3418 "Number of entries we will try to leave on the stack " \ 3419 "during parallel gc") \ 3420 range(0, max_juint) \ 3421 \ 3422 /* stack parameters */ \ 3423 product_pd(intx, StackYellowPages, \ 3424 "Number of yellow zone (recoverable overflows) pages of size " \ 3425 "4KB. If pages are bigger yellow zone is aligned up.") \ 3426 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 3427 \ 3428 product_pd(intx, StackRedPages, \ 3429 "Number of red zone (unrecoverable overflows) pages of size " \ 3430 "4KB. If pages are bigger red zone is aligned up.") \ 3431 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 3432 \ 3433 product_pd(intx, StackReservedPages, \ 3434 "Number of reserved zone (reserved to annotated methods) pages" \ 3435 " of size 4KB. If pages are bigger reserved zone is aligned up.") \ 3436 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ 3437 \ 3438 product(bool, RestrictReservedStack, true, \ 3439 "Restrict @ReservedStackAccess to trusted classes") \ 3440 \ 3441 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3442 product_pd(intx, StackShadowPages, \ 3443 "Number of shadow zone (for overflow checking) pages of size " \ 3444 "4KB. If pages are bigger shadow zone is aligned up. " \ 3445 "This should exceed the depth of the VM and native call stack.") \ 3446 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 3447 \ 3448 product_pd(intx, ThreadStackSize, \ 3449 "Thread Stack Size (in Kbytes)") \ 3450 range(0, (max_intx-os::vm_page_size())/(1 * K)) \ 3451 \ 3452 product_pd(intx, VMThreadStackSize, \ 3453 "Non-Java Thread Stack Size (in Kbytes)") \ 3454 range(0, max_intx/(1 * K)) \ 3455 \ 3456 product_pd(intx, CompilerThreadStackSize, \ 3457 "Compiler Thread Stack Size (in Kbytes)") \ 3458 range(0, max_intx/(1 * K)) \ 3459 \ 3460 develop_pd(size_t, JVMInvokeMethodSlack, \ 3461 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3462 \ 3463 /* code cache parameters */ \ 3464 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3465 develop(uintx, CodeCacheSegmentSize, \ 3466 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)), \ 3467 "Code cache segment size (in bytes) - smallest unit of " \ 3468 "allocation") \ 3469 range(1, 1024) \ 3470 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 3471 \ 3472 develop_pd(intx, CodeEntryAlignment, \ 3473 "Code entry alignment for generated code (in bytes)") \ 3474 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 3475 \ 3476 product_pd(intx, OptoLoopAlignment, \ 3477 "Align inner loops to zero relative to this modulus") \ 3478 range(1, 16) \ 3479 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 3480 \ 3481 product_pd(uintx, InitialCodeCacheSize, \ 3482 "Initial code cache size (in bytes)") \ 3483 range(0, max_uintx) \ 3484 \ 3485 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3486 "Minimum code cache size (in bytes) required to start VM.") \ 3487 range(0, max_uintx) \ 3488 \ 3489 product(bool, SegmentedCodeCache, false, \ 3490 "Use a segmented code cache") \ 3491 \ 3492 product_pd(uintx, ReservedCodeCacheSize, \ 3493 "Reserved code cache size (in bytes) - maximum code cache size") \ 3494 range(0, max_uintx) \ 3495 \ 3496 product_pd(uintx, NonProfiledCodeHeapSize, \ 3497 "Size of code heap with non-profiled methods (in bytes)") \ 3498 range(0, max_uintx) \ 3499 \ 3500 product_pd(uintx, ProfiledCodeHeapSize, \ 3501 "Size of code heap with profiled methods (in bytes)") \ 3502 range(0, max_uintx) \ 3503 \ 3504 product_pd(uintx, NonNMethodCodeHeapSize, \ 3505 "Size of code heap with non-nmethods (in bytes)") \ 3506 range(0, max_uintx) \ 3507 \ 3508 product_pd(uintx, CodeCacheExpansionSize, \ 3509 "Code cache expansion size (in bytes)") \ 3510 range(0, max_uintx) \ 3511 \ 3512 develop_pd(uintx, CodeCacheMinBlockLength, \ 3513 "Minimum number of segments in a code cache block") \ 3514 range(1, 100) \ 3515 \ 3516 notproduct(bool, ExitOnFullCodeCache, false, \ 3517 "Exit the VM if we fill the code cache") \ 3518 \ 3519 product(bool, UseCodeCacheFlushing, true, \ 3520 "Remove cold/old nmethods from the code cache") \ 3521 \ 3522 product(uintx, StartAggressiveSweepingAt, 10, \ 3523 "Start aggressive sweeping if X[%] of the code cache is free." \ 3524 "Segmented code cache: X[%] of the non-profiled heap." \ 3525 "Non-segmented code cache: X[%] of the total code cache") \ 3526 range(0, 100) \ 3527 \ 3528 /* interpreter debugging */ \ 3529 develop(intx, BinarySwitchThreshold, 5, \ 3530 "Minimal number of lookupswitch entries for rewriting to binary " \ 3531 "switch") \ 3532 \ 3533 develop(intx, StopInterpreterAt, 0, \ 3534 "Stop interpreter execution at specified bytecode number") \ 3535 \ 3536 develop(intx, TraceBytecodesAt, 0, \ 3537 "Trace bytecodes starting with specified bytecode number") \ 3538 \ 3539 /* compiler interface */ \ 3540 develop(intx, CIStart, 0, \ 3541 "The id of the first compilation to permit") \ 3542 \ 3543 develop(intx, CIStop, max_jint, \ 3544 "The id of the last compilation to permit") \ 3545 \ 3546 develop(intx, CIStartOSR, 0, \ 3547 "The id of the first osr compilation to permit " \ 3548 "(CICountOSR must be on)") \ 3549 \ 3550 develop(intx, CIStopOSR, max_jint, \ 3551 "The id of the last osr compilation to permit " \ 3552 "(CICountOSR must be on)") \ 3553 \ 3554 develop(intx, CIBreakAtOSR, -1, \ 3555 "The id of osr compilation to break at") \ 3556 \ 3557 develop(intx, CIBreakAt, -1, \ 3558 "The id of compilation to break at") \ 3559 \ 3560 product(ccstrlist, CompileOnly, "", \ 3561 "List of methods (pkg/class.name) to restrict compilation to") \ 3562 \ 3563 product(ccstr, CompileCommandFile, NULL, \ 3564 "Read compiler commands from this file [.hotspot_compiler]") \ 3565 \ 3566 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 3567 "Read compiler directives from this file") \ 3568 \ 3569 product(ccstrlist, CompileCommand, "", \ 3570 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3571 \ 3572 develop(bool, ReplayCompiles, false, \ 3573 "Enable replay of compilations from ReplayDataFile") \ 3574 \ 3575 product(ccstr, ReplayDataFile, NULL, \ 3576 "File containing compilation replay information" \ 3577 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3578 \ 3579 product(ccstr, InlineDataFile, NULL, \ 3580 "File containing inlining replay information" \ 3581 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3582 \ 3583 develop(intx, ReplaySuppressInitializers, 2, \ 3584 "Control handling of class initialization during replay: " \ 3585 "0 - don't do anything special; " \ 3586 "1 - treat all class initializers as empty; " \ 3587 "2 - treat class initializers for application classes as empty; " \ 3588 "3 - allow all class initializers to run during bootstrap but " \ 3589 " pretend they are empty after starting replay") \ 3590 range(0, 3) \ 3591 \ 3592 develop(bool, ReplayIgnoreInitErrors, false, \ 3593 "Ignore exceptions thrown during initialization for replay") \ 3594 \ 3595 product(bool, DumpReplayDataOnError, true, \ 3596 "Record replay data for crashing compiler threads") \ 3597 \ 3598 product(bool, CICompilerCountPerCPU, false, \ 3599 "1 compiler thread for log(N CPUs)") \ 3600 \ 3601 develop(intx, CIFireOOMAt, -1, \ 3602 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3603 "(non-negative value throws OOM after this many CI accesses " \ 3604 "in each compile)") \ 3605 notproduct(intx, CICrashAt, -1, \ 3606 "id of compilation to trigger assert in compiler thread for " \ 3607 "the purpose of testing, e.g. generation of replay data") \ 3608 notproduct(bool, CIObjectFactoryVerify, false, \ 3609 "enable potentially expensive verification in ciObjectFactory") \ 3610 \ 3611 /* Priorities */ \ 3612 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3613 \ 3614 product(intx, ThreadPriorityPolicy, 0, \ 3615 "0 : Normal. "\ 3616 " VM chooses priorities that are appropriate for normal "\ 3617 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3618 " to normal native priority. Java priorities below " \ 3619 " NORM_PRIORITY map to lower native priority values. On "\ 3620 " Windows applications are allowed to use higher native "\ 3621 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3622 " not use the highest possible native priority, "\ 3623 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3624 " system threads. On Linux thread priorities are ignored "\ 3625 " because the OS does not support static priority in "\ 3626 " SCHED_OTHER scheduling class which is the only choice for "\ 3627 " non-root, non-realtime applications. "\ 3628 "1 : Aggressive. "\ 3629 " Java thread priorities map over to the entire range of "\ 3630 " native thread priorities. Higher Java thread priorities map "\ 3631 " to higher native thread priorities. This policy should be "\ 3632 " used with care, as sometimes it can cause performance "\ 3633 " degradation in the application and/or the entire system. On "\ 3634 " Linux this policy requires root privilege.") \ 3635 range(0, 1) \ 3636 \ 3637 product(bool, ThreadPriorityVerbose, false, \ 3638 "Print priority changes") \ 3639 \ 3640 product(intx, CompilerThreadPriority, -1, \ 3641 "The native priority at which compiler threads should run " \ 3642 "(-1 means no change)") \ 3643 range(min_jint, max_jint) \ 3644 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 3645 \ 3646 product(intx, VMThreadPriority, -1, \ 3647 "The native priority at which the VM thread should run " \ 3648 "(-1 means no change)") \ 3649 range(-1, 127) \ 3650 \ 3651 product(bool, CompilerThreadHintNoPreempt, true, \ 3652 "(Solaris only) Give compiler threads an extra quanta") \ 3653 \ 3654 product(bool, VMThreadHintNoPreempt, false, \ 3655 "(Solaris only) Give VM thread an extra quanta") \ 3656 \ 3657 product(intx, JavaPriority1_To_OSPriority, -1, \ 3658 "Map Java priorities to OS priorities") \ 3659 range(-1, 127) \ 3660 \ 3661 product(intx, JavaPriority2_To_OSPriority, -1, \ 3662 "Map Java priorities to OS priorities") \ 3663 range(-1, 127) \ 3664 \ 3665 product(intx, JavaPriority3_To_OSPriority, -1, \ 3666 "Map Java priorities to OS priorities") \ 3667 range(-1, 127) \ 3668 \ 3669 product(intx, JavaPriority4_To_OSPriority, -1, \ 3670 "Map Java priorities to OS priorities") \ 3671 range(-1, 127) \ 3672 \ 3673 product(intx, JavaPriority5_To_OSPriority, -1, \ 3674 "Map Java priorities to OS priorities") \ 3675 range(-1, 127) \ 3676 \ 3677 product(intx, JavaPriority6_To_OSPriority, -1, \ 3678 "Map Java priorities to OS priorities") \ 3679 range(-1, 127) \ 3680 \ 3681 product(intx, JavaPriority7_To_OSPriority, -1, \ 3682 "Map Java priorities to OS priorities") \ 3683 range(-1, 127) \ 3684 \ 3685 product(intx, JavaPriority8_To_OSPriority, -1, \ 3686 "Map Java priorities to OS priorities") \ 3687 range(-1, 127) \ 3688 \ 3689 product(intx, JavaPriority9_To_OSPriority, -1, \ 3690 "Map Java priorities to OS priorities") \ 3691 range(-1, 127) \ 3692 \ 3693 product(intx, JavaPriority10_To_OSPriority,-1, \ 3694 "Map Java priorities to OS priorities") \ 3695 range(-1, 127) \ 3696 \ 3697 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3698 "Java thread priority 10 maps to critical scheduling priority") \ 3699 \ 3700 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3701 "Compiler thread(s) run at critical scheduling priority") \ 3702 \ 3703 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3704 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3705 \ 3706 /* compiler debugging */ \ 3707 notproduct(intx, CompileTheWorldStartAt, 1, \ 3708 "First class to consider when using +CompileTheWorld") \ 3709 \ 3710 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3711 "Last class to consider when using +CompileTheWorld") \ 3712 \ 3713 develop(intx, NewCodeParameter, 0, \ 3714 "Testing Only: Create a dedicated integer parameter before " \ 3715 "putback") \ 3716 \ 3717 /* new oopmap storage allocation */ \ 3718 develop(intx, MinOopMapAllocation, 8, \ 3719 "Minimum number of OopMap entries in an OopMapSet") \ 3720 \ 3721 /* Background Compilation */ \ 3722 develop(intx, LongCompileThreshold, 50, \ 3723 "Used with +TraceLongCompiles") \ 3724 \ 3725 /* recompilation */ \ 3726 product_pd(intx, CompileThreshold, \ 3727 "number of interpreted method invocations before (re-)compiling") \ 3728 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 3729 \ 3730 product(double, CompileThresholdScaling, 1.0, \ 3731 "Factor to control when first compilation happens " \ 3732 "(both with and without tiered compilation): " \ 3733 "values greater than 1.0 delay counter overflow, " \ 3734 "values between 0 and 1.0 rush counter overflow, " \ 3735 "value of 1.0 leaves compilation thresholds unchanged " \ 3736 "value of 0.0 is equivalent to -Xint. " \ 3737 "" \ 3738 "Flag can be set as per-method option. " \ 3739 "If a value is specified for a method, compilation thresholds " \ 3740 "for that method are scaled by both the value of the global flag "\ 3741 "and the value of the per-method flag.") \ 3742 range(0.0, DBL_MAX) \ 3743 \ 3744 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3745 "Interpreter (tier 0) invocation notification frequency") \ 3746 range(0, 30) \ 3747 \ 3748 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3749 "C1 without MDO (tier 2) invocation notification frequency") \ 3750 range(0, 30) \ 3751 \ 3752 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3753 "C1 with MDO profiling (tier 3) invocation notification " \ 3754 "frequency") \ 3755 range(0, 30) \ 3756 \ 3757 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3758 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3759 range(0, 30) \ 3760 \ 3761 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3762 "Interpreter (tier 0) invocation notification frequency") \ 3763 range(0, 30) \ 3764 \ 3765 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3766 "C1 without MDO (tier 2) invocation notification frequency") \ 3767 range(0, 30) \ 3768 \ 3769 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3770 "C1 with MDO profiling (tier 3) invocation notification " \ 3771 "frequency") \ 3772 range(0, 30) \ 3773 \ 3774 product(intx, Tier2CompileThreshold, 0, \ 3775 "threshold at which tier 2 compilation is invoked") \ 3776 range(0, max_jint) \ 3777 \ 3778 product(intx, Tier2BackEdgeThreshold, 0, \ 3779 "Back edge threshold at which tier 2 compilation is invoked") \ 3780 range(0, max_jint) \ 3781 \ 3782 product(intx, Tier3InvocationThreshold, 200, \ 3783 "Compile if number of method invocations crosses this " \ 3784 "threshold") \ 3785 range(0, max_jint) \ 3786 \ 3787 product(intx, Tier3MinInvocationThreshold, 100, \ 3788 "Minimum invocation to compile at tier 3") \ 3789 range(0, max_jint) \ 3790 \ 3791 product(intx, Tier3CompileThreshold, 2000, \ 3792 "Threshold at which tier 3 compilation is invoked (invocation " \ 3793 "minimum must be satisfied)") \ 3794 range(0, max_jint) \ 3795 \ 3796 product(intx, Tier3BackEdgeThreshold, 60000, \ 3797 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3798 range(0, max_jint) \ 3799 \ 3800 product(intx, Tier4InvocationThreshold, 5000, \ 3801 "Compile if number of method invocations crosses this " \ 3802 "threshold") \ 3803 range(0, max_jint) \ 3804 \ 3805 product(intx, Tier4MinInvocationThreshold, 600, \ 3806 "Minimum invocation to compile at tier 4") \ 3807 range(0, max_jint) \ 3808 \ 3809 product(intx, Tier4CompileThreshold, 15000, \ 3810 "Threshold at which tier 4 compilation is invoked (invocation " \ 3811 "minimum must be satisfied") \ 3812 range(0, max_jint) \ 3813 \ 3814 product(intx, Tier4BackEdgeThreshold, 40000, \ 3815 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3816 range(0, max_jint) \ 3817 \ 3818 product(intx, Tier3DelayOn, 5, \ 3819 "If C2 queue size grows over this amount per compiler thread " \ 3820 "stop compiling at tier 3 and start compiling at tier 2") \ 3821 range(0, max_jint) \ 3822 \ 3823 product(intx, Tier3DelayOff, 2, \ 3824 "If C2 queue size is less than this amount per compiler thread " \ 3825 "allow methods compiled at tier 2 transition to tier 3") \ 3826 range(0, max_jint) \ 3827 \ 3828 product(intx, Tier3LoadFeedback, 5, \ 3829 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3830 "reaches this amount per compiler thread") \ 3831 range(0, max_jint) \ 3832 \ 3833 product(intx, Tier4LoadFeedback, 3, \ 3834 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3835 "reaches this amount per compiler thread") \ 3836 range(0, max_jint) \ 3837 \ 3838 product(intx, TieredCompileTaskTimeout, 50, \ 3839 "Kill compile task if method was not used within " \ 3840 "given timeout in milliseconds") \ 3841 range(0, max_intx) \ 3842 \ 3843 product(intx, TieredStopAtLevel, 4, \ 3844 "Stop at given compilation level") \ 3845 range(0, 4) \ 3846 \ 3847 product(intx, Tier0ProfilingStartPercentage, 200, \ 3848 "Start profiling in interpreter if the counters exceed tier 3 " \ 3849 "thresholds by the specified percentage") \ 3850 range(0, max_jint) \ 3851 \ 3852 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3853 "Increase the compile threshold for C1 compilation if the code " \ 3854 "cache is filled by the specified percentage") \ 3855 range(0, 99) \ 3856 \ 3857 product(intx, TieredRateUpdateMinTime, 1, \ 3858 "Minimum rate sampling interval (in milliseconds)") \ 3859 range(0, max_intx) \ 3860 \ 3861 product(intx, TieredRateUpdateMaxTime, 25, \ 3862 "Maximum rate sampling interval (in milliseconds)") \ 3863 range(0, max_intx) \ 3864 \ 3865 product_pd(bool, TieredCompilation, \ 3866 "Enable tiered compilation") \ 3867 \ 3868 product(bool, PrintTieredEvents, false, \ 3869 "Print tiered events notifications") \ 3870 \ 3871 product_pd(intx, OnStackReplacePercentage, \ 3872 "NON_TIERED number of method invocations/branches (expressed as " \ 3873 "% of CompileThreshold) before (re-)compiling OSR code") \ 3874 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 3875 \ 3876 product(intx, InterpreterProfilePercentage, 33, \ 3877 "NON_TIERED number of method invocations/branches (expressed as " \ 3878 "% of CompileThreshold) before profiling in the interpreter") \ 3879 range(0, 100) \ 3880 \ 3881 develop(intx, MaxRecompilationSearchLength, 10, \ 3882 "The maximum number of frames to inspect when searching for " \ 3883 "recompilee") \ 3884 \ 3885 develop(intx, MaxInterpretedSearchLength, 3, \ 3886 "The maximum number of interpreted frames to skip when searching "\ 3887 "for recompilee") \ 3888 \ 3889 develop(intx, DesiredMethodLimit, 8000, \ 3890 "The desired maximum method size (in bytecodes) after inlining") \ 3891 \ 3892 develop(intx, HugeMethodLimit, 8000, \ 3893 "Don't compile methods larger than this if " \ 3894 "+DontCompileHugeMethods") \ 3895 \ 3896 /* New JDK 1.4 reflection implementation */ \ 3897 \ 3898 develop(intx, FastSuperclassLimit, 8, \ 3899 "Depth of hardwired instanceof accelerator array") \ 3900 \ 3901 /* Properties for Java libraries */ \ 3902 \ 3903 product(uint64_t, MaxDirectMemorySize, 0, \ 3904 "Maximum total size of NIO direct-buffer allocations") \ 3905 range(0, max_jlong) \ 3906 \ 3907 /* Flags used for temporary code during development */ \ 3908 \ 3909 diagnostic(bool, UseNewCode, false, \ 3910 "Testing Only: Use the new version while testing") \ 3911 \ 3912 diagnostic(bool, UseNewCode2, false, \ 3913 "Testing Only: Use the new version while testing") \ 3914 \ 3915 diagnostic(bool, UseNewCode3, false, \ 3916 "Testing Only: Use the new version while testing") \ 3917 \ 3918 /* flags for performance data collection */ \ 3919 \ 3920 product(bool, UsePerfData, falseInEmbedded, \ 3921 "Flag to disable jvmstat instrumentation for performance testing "\ 3922 "and problem isolation purposes") \ 3923 \ 3924 product(bool, PerfDataSaveToFile, false, \ 3925 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3926 \ 3927 product(ccstr, PerfDataSaveFile, NULL, \ 3928 "Save PerfData memory to the specified absolute pathname. " \ 3929 "The string %p in the file name (if present) " \ 3930 "will be replaced by pid") \ 3931 \ 3932 product(intx, PerfDataSamplingInterval, 50, \ 3933 "Data sampling interval (in milliseconds)") \ 3934 range(PeriodicTask::min_interval, max_jint) \ 3935 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 3936 \ 3937 develop(bool, PerfTraceDataCreation, false, \ 3938 "Trace creation of Performance Data Entries") \ 3939 \ 3940 develop(bool, PerfTraceMemOps, false, \ 3941 "Trace PerfMemory create/attach/detach calls") \ 3942 \ 3943 product(bool, PerfDisableSharedMem, false, \ 3944 "Store performance data in standard memory") \ 3945 \ 3946 product(intx, PerfDataMemorySize, 32*K, \ 3947 "Size of performance data memory region. Will be rounded " \ 3948 "up to a multiple of the native os page size.") \ 3949 range(128, 32*64*K) \ 3950 \ 3951 product(intx, PerfMaxStringConstLength, 1024, \ 3952 "Maximum PerfStringConstant string length before truncation") \ 3953 range(32, 32*K) \ 3954 \ 3955 product(bool, PerfAllowAtExitRegistration, false, \ 3956 "Allow registration of atexit() methods") \ 3957 \ 3958 product(bool, PerfBypassFileSystemCheck, false, \ 3959 "Bypass Win32 file system criteria checks (Windows Only)") \ 3960 \ 3961 product(intx, UnguardOnExecutionViolation, 0, \ 3962 "Unguard page and retry on no-execute fault (Win32 only) " \ 3963 "0=off, 1=conservative, 2=aggressive") \ 3964 range(0, 2) \ 3965 \ 3966 /* Serviceability Support */ \ 3967 \ 3968 product(bool, ManagementServer, false, \ 3969 "Create JMX Management Server") \ 3970 \ 3971 product(bool, DisableAttachMechanism, false, \ 3972 "Disable mechanism that allows tools to attach to this VM") \ 3973 \ 3974 product(bool, StartAttachListener, false, \ 3975 "Always start Attach Listener at VM startup") \ 3976 \ 3977 manageable(bool, PrintConcurrentLocks, false, \ 3978 "Print java.util.concurrent locks in thread dump") \ 3979 \ 3980 product(bool, TransmitErrorReport, false, \ 3981 "Enable error report transmission on erroneous termination") \ 3982 \ 3983 product(ccstr, ErrorReportServer, NULL, \ 3984 "Override built-in error report server address") \ 3985 \ 3986 /* Shared spaces */ \ 3987 \ 3988 product(bool, UseSharedSpaces, true, \ 3989 "Use shared spaces for metadata") \ 3990 \ 3991 product(bool, VerifySharedSpaces, false, \ 3992 "Verify shared spaces (false for default archive, true for " \ 3993 "archive specified by -XX:SharedArchiveFile)") \ 3994 \ 3995 product(bool, RequireSharedSpaces, false, \ 3996 "Require shared spaces for metadata") \ 3997 \ 3998 product(bool, DumpSharedSpaces, false, \ 3999 "Special mode: JVM reads a class list, loads classes, builds " \ 4000 "shared spaces, and dumps the shared spaces to a file to be " \ 4001 "used in future JVM runs") \ 4002 \ 4003 product(bool, PrintSharedSpaces, false, \ 4004 "Print usage of shared spaces") \ 4005 \ 4006 product(bool, PrintSharedArchiveAndExit, false, \ 4007 "Print shared archive file contents") \ 4008 \ 4009 product(bool, PrintSharedDictionary, false, \ 4010 "If PrintSharedArchiveAndExit is true, also print the shared " \ 4011 "dictionary") \ 4012 \ 4013 product(size_t, SharedReadWriteSize, DEFAULT_SHARED_READ_WRITE_SIZE, \ 4014 "Size of read-write space for metadata (in bytes)") \ 4015 range(MIN_SHARED_READ_WRITE_SIZE, MAX_SHARED_READ_WRITE_SIZE) \ 4016 constraint(SharedReadWriteSizeConstraintFunc,AfterErgo) \ 4017 \ 4018 product(size_t, SharedReadOnlySize, DEFAULT_SHARED_READ_ONLY_SIZE, \ 4019 "Size of read-only space for metadata (in bytes)") \ 4020 range(MIN_SHARED_READ_ONLY_SIZE, MAX_SHARED_READ_ONLY_SIZE) \ 4021 constraint(SharedReadOnlySizeConstraintFunc,AfterErgo) \ 4022 \ 4023 product(size_t, SharedMiscDataSize, DEFAULT_SHARED_MISC_DATA_SIZE, \ 4024 "Size of the shared miscellaneous data area (in bytes)") \ 4025 range(MIN_SHARED_MISC_DATA_SIZE, MAX_SHARED_MISC_DATA_SIZE) \ 4026 constraint(SharedMiscDataSizeConstraintFunc,AfterErgo) \ 4027 \ 4028 product(size_t, SharedMiscCodeSize, DEFAULT_SHARED_MISC_CODE_SIZE, \ 4029 "Size of the shared miscellaneous code area (in bytes)") \ 4030 range(MIN_SHARED_MISC_CODE_SIZE, MAX_SHARED_MISC_CODE_SIZE) \ 4031 constraint(SharedMiscCodeSizeConstraintFunc,AfterErgo) \ 4032 \ 4033 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 4034 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 4035 "Address to allocate shared memory region for class data") \ 4036 range(0, SIZE_MAX) \ 4037 \ 4038 product(uintx, SharedSymbolTableBucketSize, 4, \ 4039 "Average number of symbols per bucket in shared table") \ 4040 range(2, 246) \ 4041 \ 4042 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 4043 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 4044 "classes. Just exclude them from the shared dictionary.") \ 4045 \ 4046 diagnostic(bool, PrintMethodHandleStubs, false, \ 4047 "Print generated stub code for method handles") \ 4048 \ 4049 develop(bool, TraceMethodHandles, false, \ 4050 "trace internal method handle operations") \ 4051 \ 4052 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4053 "perform extra checks when constructing method handles") \ 4054 \ 4055 diagnostic(bool, ShowHiddenFrames, false, \ 4056 "show method handle implementation frames (usually hidden)") \ 4057 \ 4058 experimental(bool, TrustFinalNonStaticFields, false, \ 4059 "trust final non-static declarations for constant folding") \ 4060 \ 4061 diagnostic(bool, FoldStableValues, true, \ 4062 "Optimize loads from stable fields (marked w/ @Stable)") \ 4063 \ 4064 develop(bool, TraceInvokeDynamic, false, \ 4065 "trace internal invoke dynamic operations") \ 4066 \ 4067 diagnostic(bool, PauseAtStartup, false, \ 4068 "Causes the VM to pause at startup time and wait for the pause " \ 4069 "file to be removed (default: ./vm.paused.<pid>)") \ 4070 \ 4071 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4072 "The file to create and for whose removal to await when pausing " \ 4073 "at startup. (default: ./vm.paused.<pid>)") \ 4074 \ 4075 diagnostic(bool, PauseAtExit, false, \ 4076 "Pause and wait for keypress on exit if a debugger is attached") \ 4077 \ 4078 product(bool, ExtendedDTraceProbes, false, \ 4079 "Enable performance-impacting dtrace probes") \ 4080 \ 4081 product(bool, DTraceMethodProbes, false, \ 4082 "Enable dtrace probes for method-entry and method-exit") \ 4083 \ 4084 product(bool, DTraceAllocProbes, false, \ 4085 "Enable dtrace probes for object allocation") \ 4086 \ 4087 product(bool, DTraceMonitorProbes, false, \ 4088 "Enable dtrace probes for monitor events") \ 4089 \ 4090 product(bool, RelaxAccessControlCheck, false, \ 4091 "Relax the access control checks in the verifier") \ 4092 \ 4093 product(uintx, StringTableSize, defaultStringTableSize, \ 4094 "Number of buckets in the interned String table") \ 4095 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4096 \ 4097 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4098 "Number of buckets in the JVM internal Symbol table") \ 4099 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4100 \ 4101 product(bool, UseStringDeduplication, false, \ 4102 "Use string deduplication") \ 4103 \ 4104 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4105 "A string must reach this age (or be promoted to an old region) " \ 4106 "to be considered for deduplication") \ 4107 range(1, markOopDesc::max_age) \ 4108 \ 4109 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4110 "Force table resize every time the table is scanned") \ 4111 \ 4112 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4113 "Force table rehash every time the table is scanned") \ 4114 \ 4115 diagnostic(bool, WhiteBoxAPI, false, \ 4116 "Enable internal testing APIs") \ 4117 \ 4118 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4119 "Default survivor space alignment in bytes") \ 4120 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 4121 \ 4122 product(bool , AllowNonVirtualCalls, false, \ 4123 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4124 \ 4125 product(ccstr, DumpLoadedClassList, NULL, \ 4126 "Dump the names all loaded classes, that could be stored into " \ 4127 "the CDS archive, in the specified file") \ 4128 \ 4129 product(ccstr, SharedClassListFile, NULL, \ 4130 "Override the default CDS class list") \ 4131 \ 4132 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4133 "Override the default location of the CDS archive file") \ 4134 \ 4135 product(ccstr, ExtraSharedClassListFile, NULL, \ 4136 "Extra classlist for building the CDS archive file") \ 4137 \ 4138 experimental(size_t, ArrayAllocatorMallocLimit, \ 4139 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4140 "Allocation less than this value will be allocated " \ 4141 "using malloc. Larger allocations will use mmap.") \ 4142 \ 4143 experimental(bool, AlwaysAtomicAccesses, false, \ 4144 "Accesses to all variables should always be atomic") \ 4145 \ 4146 product(bool, EnableTracing, false, \ 4147 "Enable event-based tracing") \ 4148 \ 4149 product(bool, UseLockedTracing, false, \ 4150 "Use locked-tracing when doing event-based tracing") \ 4151 \ 4152 diagnostic(bool, UseUnalignedAccesses, false, \ 4153 "Use unaligned memory accesses in Unsafe") \ 4154 \ 4155 product_pd(bool, PreserveFramePointer, \ 4156 "Use the FP register for holding the frame pointer " \ 4157 "and not as a general purpose register.") \ 4158 \ 4159 diagnostic(bool, CheckIntrinsics, true, \ 4160 "When a class C is loaded, check that " \ 4161 "(1) all intrinsics defined by the VM for class C are present "\ 4162 "in the loaded class file and are marked with the " \ 4163 "@HotSpotIntrinsicCandidate annotation, that " \ 4164 "(2) there is an intrinsic registered for all loaded methods " \ 4165 "that are annotated with the @HotSpotIntrinsicCandidate " \ 4166 "annotation, and that " \ 4167 "(3) no orphan methods exist for class C (i.e., methods for " \ 4168 "which the VM declares an intrinsic but that are not declared "\ 4169 "in the loaded class C. " \ 4170 "Check (3) is available only in debug builds.") \ 4171 \ 4172 diagnostic_pd(intx, InitArrayShortSize, \ 4173 "Threshold small size (in bytes) for clearing arrays. " \ 4174 "Anything this size or smaller may get converted to discrete " \ 4175 "scalar stores.") \ 4176 range(0, max_intx) \ 4177 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ 4178 \ 4179 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 4180 "Disable backwards compatibility for compile commands.") \ 4181 \ 4182 diagnostic(bool, CompilerDirectivesPrint, false, \ 4183 "Print compiler directives on installation.") \ 4184 diagnostic(int, CompilerDirectivesLimit, 50, \ 4185 "Limit on number of compiler directives.") 4186 4187 4188/* 4189 * Macros for factoring of globals 4190 */ 4191 4192// Interface macros 4193#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4194#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4195#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4196#define DECLARE_PD_DIAGNOSTIC_FLAG(type, name, doc) extern "C" type name; 4197#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4198#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4199#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4200#ifdef PRODUCT 4201#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 4202#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 4203#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 4204#else 4205#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4206#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4207#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4208#endif // PRODUCT 4209// Special LP64 flags, product only needed for now. 4210#ifdef _LP64 4211#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4212#else 4213#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4214#endif // _LP64 4215 4216// Implementation macros 4217#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4218#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4219#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4220#define MATERIALIZE_PD_DIAGNOSTIC_FLAG(type, name, doc) type name = pd_##name; 4221#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4222#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4223#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4224#ifdef PRODUCT 4225#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 4226#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 4227#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 4228#else 4229#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4230#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4231#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4232#endif // PRODUCT 4233#ifdef _LP64 4234#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4235#else 4236#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4237#endif // _LP64 4238 4239// Only materialize src code for range checking when required, ignore otherwise 4240#define IGNORE_RANGE(a, b) 4241// Only materialize src code for contraint checking when required, ignore otherwise 4242#define IGNORE_CONSTRAINT(func,type) 4243 4244#define IGNORE_WRITEABLE(type) 4245 4246RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4247 DECLARE_PD_DEVELOPER_FLAG, \ 4248 DECLARE_PRODUCT_FLAG, \ 4249 DECLARE_PD_PRODUCT_FLAG, \ 4250 DECLARE_DIAGNOSTIC_FLAG, \ 4251 DECLARE_PD_DIAGNOSTIC_FLAG, \ 4252 DECLARE_EXPERIMENTAL_FLAG, \ 4253 DECLARE_NOTPRODUCT_FLAG, \ 4254 DECLARE_MANAGEABLE_FLAG, \ 4255 DECLARE_PRODUCT_RW_FLAG, \ 4256 DECLARE_LP64_PRODUCT_FLAG, \ 4257 IGNORE_RANGE, \ 4258 IGNORE_CONSTRAINT, \ 4259 IGNORE_WRITEABLE) 4260 4261RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4262 DECLARE_PD_DEVELOPER_FLAG, \ 4263 DECLARE_PRODUCT_FLAG, \ 4264 DECLARE_PD_PRODUCT_FLAG, \ 4265 DECLARE_DIAGNOSTIC_FLAG, \ 4266 DECLARE_PD_DIAGNOSTIC_FLAG, \ 4267 DECLARE_NOTPRODUCT_FLAG, \ 4268 IGNORE_RANGE, \ 4269 IGNORE_CONSTRAINT, \ 4270 IGNORE_WRITEABLE) 4271 4272ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4273 DECLARE_PRODUCT_FLAG, \ 4274 DECLARE_DIAGNOSTIC_FLAG, \ 4275 DECLARE_EXPERIMENTAL_FLAG, \ 4276 DECLARE_NOTPRODUCT_FLAG, \ 4277 IGNORE_RANGE, \ 4278 IGNORE_CONSTRAINT, \ 4279 IGNORE_WRITEABLE) 4280 4281// Extensions 4282 4283#include "runtime/globals_ext.hpp" 4284 4285#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4286