globals.hpp revision 9283:f31349f1215e
1/* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26#define SHARE_VM_RUNTIME_GLOBALS_HPP 27 28#include <float.h> 29#include "utilities/debug.hpp" 30#include <float.h> // for DBL_MAX 31 32// use this for flags that are true per default in the tiered build 33// but false in non-tiered builds, and vice versa 34#ifdef TIERED 35#define trueInTiered true 36#define falseInTiered false 37#else 38#define trueInTiered false 39#define falseInTiered true 40#endif 41 42#ifdef TARGET_ARCH_x86 43# include "globals_x86.hpp" 44#endif 45#ifdef TARGET_ARCH_sparc 46# include "globals_sparc.hpp" 47#endif 48#ifdef TARGET_ARCH_zero 49# include "globals_zero.hpp" 50#endif 51#ifdef TARGET_ARCH_arm 52# include "globals_arm.hpp" 53#endif 54#ifdef TARGET_ARCH_ppc 55# include "globals_ppc.hpp" 56#endif 57#ifdef TARGET_ARCH_aarch64 58# include "globals_aarch64.hpp" 59#endif 60#ifdef TARGET_OS_FAMILY_linux 61# include "globals_linux.hpp" 62#endif 63#ifdef TARGET_OS_FAMILY_solaris 64# include "globals_solaris.hpp" 65#endif 66#ifdef TARGET_OS_FAMILY_windows 67# include "globals_windows.hpp" 68#endif 69#ifdef TARGET_OS_FAMILY_aix 70# include "globals_aix.hpp" 71#endif 72#ifdef TARGET_OS_FAMILY_bsd 73# include "globals_bsd.hpp" 74#endif 75#ifdef TARGET_OS_ARCH_linux_x86 76# include "globals_linux_x86.hpp" 77#endif 78#ifdef TARGET_OS_ARCH_linux_sparc 79# include "globals_linux_sparc.hpp" 80#endif 81#ifdef TARGET_OS_ARCH_linux_zero 82# include "globals_linux_zero.hpp" 83#endif 84#ifdef TARGET_OS_ARCH_solaris_x86 85# include "globals_solaris_x86.hpp" 86#endif 87#ifdef TARGET_OS_ARCH_solaris_sparc 88# include "globals_solaris_sparc.hpp" 89#endif 90#ifdef TARGET_OS_ARCH_windows_x86 91# include "globals_windows_x86.hpp" 92#endif 93#ifdef TARGET_OS_ARCH_linux_arm 94# include "globals_linux_arm.hpp" 95#endif 96#ifdef TARGET_OS_ARCH_linux_ppc 97# include "globals_linux_ppc.hpp" 98#endif 99#ifdef TARGET_OS_ARCH_linux_aarch64 100# include "globals_linux_aarch64.hpp" 101#endif 102#ifdef TARGET_OS_ARCH_aix_ppc 103# include "globals_aix_ppc.hpp" 104#endif 105#ifdef TARGET_OS_ARCH_bsd_x86 106# include "globals_bsd_x86.hpp" 107#endif 108#ifdef TARGET_OS_ARCH_bsd_zero 109# include "globals_bsd_zero.hpp" 110#endif 111#ifdef COMPILER1 112#ifdef TARGET_ARCH_x86 113# include "c1_globals_x86.hpp" 114#endif 115#ifdef TARGET_ARCH_sparc 116# include "c1_globals_sparc.hpp" 117#endif 118#ifdef TARGET_ARCH_arm 119# include "c1_globals_arm.hpp" 120#endif 121#ifdef TARGET_ARCH_aarch64 122# include "c1_globals_aarch64.hpp" 123#endif 124#ifdef TARGET_OS_FAMILY_linux 125# include "c1_globals_linux.hpp" 126#endif 127#ifdef TARGET_OS_FAMILY_solaris 128# include "c1_globals_solaris.hpp" 129#endif 130#ifdef TARGET_OS_FAMILY_windows 131# include "c1_globals_windows.hpp" 132#endif 133#ifdef TARGET_OS_FAMILY_aix 134# include "c1_globals_aix.hpp" 135#endif 136#ifdef TARGET_OS_FAMILY_bsd 137# include "c1_globals_bsd.hpp" 138#endif 139#ifdef TARGET_ARCH_ppc 140# include "c1_globals_ppc.hpp" 141#endif 142#endif 143#ifdef COMPILER2 144#ifdef TARGET_ARCH_x86 145# include "c2_globals_x86.hpp" 146#endif 147#ifdef TARGET_ARCH_sparc 148# include "c2_globals_sparc.hpp" 149#endif 150#ifdef TARGET_ARCH_arm 151# include "c2_globals_arm.hpp" 152#endif 153#ifdef TARGET_ARCH_ppc 154# include "c2_globals_ppc.hpp" 155#endif 156#ifdef TARGET_ARCH_aarch64 157# include "c2_globals_aarch64.hpp" 158#endif 159#ifdef TARGET_OS_FAMILY_linux 160# include "c2_globals_linux.hpp" 161#endif 162#ifdef TARGET_OS_FAMILY_solaris 163# include "c2_globals_solaris.hpp" 164#endif 165#ifdef TARGET_OS_FAMILY_windows 166# include "c2_globals_windows.hpp" 167#endif 168#ifdef TARGET_OS_FAMILY_aix 169# include "c2_globals_aix.hpp" 170#endif 171#ifdef TARGET_OS_FAMILY_bsd 172# include "c2_globals_bsd.hpp" 173#endif 174#endif 175#ifdef SHARK 176#ifdef TARGET_ARCH_zero 177# include "shark_globals_zero.hpp" 178#endif 179#endif 180 181#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) && !INCLUDE_JVMCI 182define_pd_global(bool, BackgroundCompilation, false); 183define_pd_global(bool, UseTLAB, false); 184define_pd_global(bool, CICompileOSR, false); 185define_pd_global(bool, UseTypeProfile, false); 186define_pd_global(bool, UseOnStackReplacement, false); 187define_pd_global(bool, InlineIntrinsics, false); 188define_pd_global(bool, PreferInterpreterNativeStubs, true); 189define_pd_global(bool, ProfileInterpreter, false); 190define_pd_global(bool, ProfileTraps, false); 191define_pd_global(bool, TieredCompilation, false); 192 193define_pd_global(intx, CompileThreshold, 0); 194 195define_pd_global(intx, OnStackReplacePercentage, 0); 196define_pd_global(bool, ResizeTLAB, false); 197define_pd_global(intx, FreqInlineSize, 0); 198define_pd_global(size_t, NewSizeThreadIncrease, 4*K); 199define_pd_global(intx, InlineClassNatives, true); 200define_pd_global(intx, InlineUnsafeOps, true); 201define_pd_global(intx, InitialCodeCacheSize, 160*K); 202define_pd_global(intx, ReservedCodeCacheSize, 32*M); 203define_pd_global(intx, NonProfiledCodeHeapSize, 0); 204define_pd_global(intx, ProfiledCodeHeapSize, 0); 205define_pd_global(intx, NonNMethodCodeHeapSize, 32*M); 206 207define_pd_global(intx, CodeCacheExpansionSize, 32*K); 208define_pd_global(intx, CodeCacheMinBlockLength, 1); 209define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 210define_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 211define_pd_global(bool, NeverActAsServerClassMachine, true); 212define_pd_global(uint64_t,MaxRAM, 1ULL*G); 213#define CI_COMPILER_COUNT 0 214#else 215 216#if defined(COMPILER2) || INCLUDE_JVMCI 217#define CI_COMPILER_COUNT 2 218#else 219#define CI_COMPILER_COUNT 1 220#endif // COMPILER2 || INCLUDE_JVMCI 221 222#endif // no compilers 223 224// string type aliases used only in this file 225typedef const char* ccstr; 226typedef const char* ccstrlist; // represents string arguments which accumulate 227 228struct Flag { 229 enum Flags { 230 // value origin 231 DEFAULT = 0, 232 COMMAND_LINE = 1, 233 ENVIRON_VAR = 2, 234 CONFIG_FILE = 3, 235 MANAGEMENT = 4, 236 ERGONOMIC = 5, 237 ATTACH_ON_DEMAND = 6, 238 INTERNAL = 7, 239 240 LAST_VALUE_ORIGIN = INTERNAL, 241 VALUE_ORIGIN_BITS = 4, 242 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS), 243 244 // flag kind 245 KIND_PRODUCT = 1 << 4, 246 KIND_MANAGEABLE = 1 << 5, 247 KIND_DIAGNOSTIC = 1 << 6, 248 KIND_EXPERIMENTAL = 1 << 7, 249 KIND_NOT_PRODUCT = 1 << 8, 250 KIND_DEVELOP = 1 << 9, 251 KIND_PLATFORM_DEPENDENT = 1 << 10, 252 KIND_READ_WRITE = 1 << 11, 253 KIND_C1 = 1 << 12, 254 KIND_C2 = 1 << 13, 255 KIND_ARCH = 1 << 14, 256 KIND_SHARK = 1 << 15, 257 KIND_LP64_PRODUCT = 1 << 16, 258 KIND_COMMERCIAL = 1 << 17, 259 KIND_JVMCI = 1 << 18, 260 261 KIND_MASK = ~VALUE_ORIGIN_MASK 262 }; 263 264 enum Error { 265 // no error 266 SUCCESS = 0, 267 // flag name is missing 268 MISSING_NAME, 269 // flag value is missing 270 MISSING_VALUE, 271 // error parsing the textual form of the value 272 WRONG_FORMAT, 273 // flag is not writeable 274 NON_WRITABLE, 275 // flag value is outside of its bounds 276 OUT_OF_BOUNDS, 277 // flag value violates its constraint 278 VIOLATES_CONSTRAINT, 279 // there is no flag with the given name 280 INVALID_FLAG, 281 // other, unspecified error related to setting the flag 282 ERR_OTHER 283 }; 284 285 const char* _type; 286 const char* _name; 287 void* _addr; 288 NOT_PRODUCT(const char* _doc;) 289 Flags _flags; 290 291 // points to all Flags static array 292 static Flag* flags; 293 294 // number of flags 295 static size_t numFlags; 296 297 static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); }; 298 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false); 299 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 300 301 void check_writable(); 302 303 bool is_bool() const; 304 bool get_bool() const; 305 void set_bool(bool value); 306 307 bool is_int() const; 308 int get_int() const; 309 void set_int(int value); 310 311 bool is_uint() const; 312 uint get_uint() const; 313 void set_uint(uint value); 314 315 bool is_intx() const; 316 intx get_intx() const; 317 void set_intx(intx value); 318 319 bool is_uintx() const; 320 uintx get_uintx() const; 321 void set_uintx(uintx value); 322 323 bool is_uint64_t() const; 324 uint64_t get_uint64_t() const; 325 void set_uint64_t(uint64_t value); 326 327 bool is_size_t() const; 328 size_t get_size_t() const; 329 void set_size_t(size_t value); 330 331 bool is_double() const; 332 double get_double() const; 333 void set_double(double value); 334 335 bool is_ccstr() const; 336 bool ccstr_accumulates() const; 337 ccstr get_ccstr() const; 338 void set_ccstr(ccstr value); 339 340 Flags get_origin(); 341 void set_origin(Flags origin); 342 343 bool is_default(); 344 bool is_ergonomic(); 345 bool is_command_line(); 346 347 bool is_product() const; 348 bool is_manageable() const; 349 bool is_diagnostic() const; 350 bool is_experimental() const; 351 bool is_notproduct() const; 352 bool is_develop() const; 353 bool is_read_write() const; 354 bool is_commercial() const; 355 356 bool is_constant_in_binary() const; 357 358 bool is_unlocker() const; 359 bool is_unlocked() const; 360 bool is_writeable() const; 361 bool is_external() const; 362 363 bool is_unlocker_ext() const; 364 bool is_unlocked_ext() const; 365 bool is_writeable_ext() const; 366 bool is_external_ext() const; 367 368 void unlock_diagnostic(); 369 370 void get_locked_message(char*, int) const; 371 void get_locked_message_ext(char*, int) const; 372 373 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 374 void print_on(outputStream* st, bool withComments = false, bool printRanges = false); 375 void print_kind(outputStream* st); 376 void print_as_flag(outputStream* st); 377 378 static const char* flag_error_str(Flag::Error error); 379}; 380 381// debug flags control various aspects of the VM and are global accessible 382 383// use FlagSetting to temporarily change some debug flag 384// e.g. FlagSetting fs(DebugThisAndThat, true); 385// restored to previous value upon leaving scope 386class FlagSetting { 387 bool val; 388 bool* flag; 389 public: 390 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 391 ~FlagSetting() { *flag = val; } 392}; 393 394 395class CounterSetting { 396 intx* counter; 397 public: 398 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 399 ~CounterSetting() { (*counter)--; } 400}; 401 402class IntFlagSetting { 403 int val; 404 int* flag; 405 public: 406 IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; } 407 ~IntFlagSetting() { *flag = val; } 408}; 409 410class UIntFlagSetting { 411 uint val; 412 uint* flag; 413 public: 414 UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; } 415 ~UIntFlagSetting() { *flag = val; } 416}; 417 418class UIntXFlagSetting { 419 uintx val; 420 uintx* flag; 421 public: 422 UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 423 ~UIntXFlagSetting() { *flag = val; } 424}; 425 426class DoubleFlagSetting { 427 double val; 428 double* flag; 429 public: 430 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 431 ~DoubleFlagSetting() { *flag = val; } 432}; 433 434class SizeTFlagSetting { 435 size_t val; 436 size_t* flag; 437 public: 438 SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; } 439 ~SizeTFlagSetting() { *flag = val; } 440}; 441 442 443class CommandLineFlags { 444public: 445 static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false); 446 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); } 447 static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin); 448 static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 449 450 static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false); 451 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); } 452 static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin); 453 static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); } 454 455 static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false); 456 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); } 457 static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin); 458 static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); } 459 460 static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false); 461 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); } 462 static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin); 463 static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 464 465 static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false); 466 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); } 467 static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin); 468 static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 469 470 static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false); 471 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); } 472 static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin); 473 static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); } 474 475 static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false); 476 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); } 477 static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin); 478 static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 479 480 static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false); 481 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); } 482 static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin); 483 static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 484 485 static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false); 486 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); } 487 // Contract: Flag will make private copy of the incoming value. 488 // Outgoing value is always malloc-ed, and caller MUST call free. 489 static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin); 490 static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 491 492 // Returns false if name is not a command line flag. 493 static bool wasSetOnCmdline(const char* name, bool* value); 494 static void printSetFlags(outputStream* out); 495 496 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 497 static void printFlags(outputStream* out, bool withComments, bool printRanges = false); 498 499 static void verify() PRODUCT_RETURN; 500}; 501 502// use this for flags that are true by default in the debug version but 503// false in the optimized version, and vice versa 504#ifdef ASSERT 505#define trueInDebug true 506#define falseInDebug false 507#else 508#define trueInDebug false 509#define falseInDebug true 510#endif 511 512// use this for flags that are true per default in the product build 513// but false in development builds, and vice versa 514#ifdef PRODUCT 515#define trueInProduct true 516#define falseInProduct false 517#else 518#define trueInProduct false 519#define falseInProduct true 520#endif 521 522#ifdef JAVASE_EMBEDDED 523#define falseInEmbedded false 524#else 525#define falseInEmbedded true 526#endif 527 528// develop flags are settable / visible only during development and are constant in the PRODUCT version 529// product flags are always settable / visible 530// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 531 532// A flag must be declared with one of the following types: 533// bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 534// The type "ccstr" is an alias for "const char*" and is used 535// only in this file, because the macrology requires single-token type names. 536 537// Note: Diagnostic options not meant for VM tuning or for product modes. 538// They are to be used for VM quality assurance or field diagnosis 539// of VM bugs. They are hidden so that users will not be encouraged to 540// try them as if they were VM ordinary execution options. However, they 541// are available in the product version of the VM. Under instruction 542// from support engineers, VM customers can turn them on to collect 543// diagnostic information about VM problems. To use a VM diagnostic 544// option, you must first specify +UnlockDiagnosticVMOptions. 545// (This master switch also affects the behavior of -Xprintflags.) 546// 547// experimental flags are in support of features that are not 548// part of the officially supported product, but are available 549// for experimenting with. They could, for example, be performance 550// features that may not have undergone full or rigorous QA, but which may 551// help performance in some cases and released for experimentation 552// by the community of users and developers. This flag also allows one to 553// be able to build a fully supported product that nonetheless also 554// ships with some unsupported, lightly tested, experimental features. 555// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 556// UnlockExperimentalVMOptions flag, which allows the control and 557// modification of the experimental flags. 558// 559// Nota bene: neither diagnostic nor experimental options should be used casually, 560// and they are not supported on production loads, except under explicit 561// direction from support engineers. 562// 563// manageable flags are writeable external product flags. 564// They are dynamically writeable through the JDK management interface 565// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 566// These flags are external exported interface (see CCC). The list of 567// manageable flags can be queried programmatically through the management 568// interface. 569// 570// A flag can be made as "manageable" only if 571// - the flag is defined in a CCC as an external exported interface. 572// - the VM implementation supports dynamic setting of the flag. 573// This implies that the VM must *always* query the flag variable 574// and not reuse state related to the flag state at any given time. 575// - you want the flag to be queried programmatically by the customers. 576// 577// product_rw flags are writeable internal product flags. 578// They are like "manageable" flags but for internal/private use. 579// The list of product_rw flags are internal/private flags which 580// may be changed/removed in a future release. It can be set 581// through the management interface to get/set value 582// when the name of flag is supplied. 583// 584// A flag can be made as "product_rw" only if 585// - the VM implementation supports dynamic setting of the flag. 586// This implies that the VM must *always* query the flag variable 587// and not reuse state related to the flag state at any given time. 588// 589// Note that when there is a need to support develop flags to be writeable, 590// it can be done in the same way as product_rw. 591// 592// range is a macro that will expand to min and max arguments for range 593// checking code if provided - see commandLineFlagRangeList.hpp 594// 595// constraint is a macro that will expand to custom function call 596// for constraint checking if provided - see commandLineFlagConstraintList.hpp 597// 598 599#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product, range, constraint) \ 600 \ 601 lp64_product(bool, UseCompressedOops, false, \ 602 "Use 32-bit object references in 64-bit VM. " \ 603 "lp64_product means flag is always constant in 32 bit VM") \ 604 \ 605 lp64_product(bool, UseCompressedClassPointers, false, \ 606 "Use 32-bit class pointers in 64-bit VM. " \ 607 "lp64_product means flag is always constant in 32 bit VM") \ 608 \ 609 notproduct(bool, CheckCompressedOops, true, \ 610 "Generate checks in encoding/decoding code in debug VM") \ 611 \ 612 product_pd(size_t, HeapBaseMinAddress, \ 613 "OS specific low limit for heap base address") \ 614 \ 615 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 616 "Heap allocation steps through preferred address regions to find" \ 617 " where it can allocate the heap. Number of steps to take per " \ 618 "region.") \ 619 range(1, max_uintx) \ 620 \ 621 diagnostic(bool, PrintCompressedOopsMode, false, \ 622 "Print compressed oops base address and encoding mode") \ 623 \ 624 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 625 "Default object alignment in bytes, 8 is minimum") \ 626 range(8, 256) \ 627 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 628 \ 629 product(bool, AssumeMP, false, \ 630 "Instruct the VM to assume multiple processors are available") \ 631 \ 632 /* UseMembar is theoretically a temp flag used for memory barrier */ \ 633 /* removal testing. It was supposed to be removed before FCS but has */ \ 634 /* been re-added (see 6401008) */ \ 635 product_pd(bool, UseMembar, \ 636 "(Unstable) Issues membars on thread state transitions") \ 637 \ 638 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 639 "Clean the chunk pool asynchronously") \ 640 \ 641 experimental(bool, AlwaysSafeConstructors, false, \ 642 "Force safe construction, as if all fields are final.") \ 643 \ 644 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 645 "Enable normal processing of flags relating to field diagnostics")\ 646 \ 647 experimental(bool, UnlockExperimentalVMOptions, false, \ 648 "Enable normal processing of flags relating to experimental " \ 649 "features") \ 650 \ 651 product(bool, JavaMonitorsInStackTrace, true, \ 652 "Print information about Java monitor locks when the stacks are" \ 653 "dumped") \ 654 \ 655 product_pd(bool, UseLargePages, \ 656 "Use large page memory") \ 657 \ 658 product_pd(bool, UseLargePagesIndividualAllocation, \ 659 "Allocate large pages individually for better affinity") \ 660 \ 661 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 662 "Fail large pages individual allocation") \ 663 \ 664 product(bool, UseLargePagesInMetaspace, false, \ 665 "Use large page memory in metaspace. " \ 666 "Only used if UseLargePages is enabled.") \ 667 \ 668 develop(bool, TracePageSizes, false, \ 669 "Trace page size selection and usage") \ 670 \ 671 product(bool, UseNUMA, false, \ 672 "Use NUMA if available") \ 673 \ 674 product(bool, UseNUMAInterleaving, false, \ 675 "Interleave memory across NUMA nodes if available") \ 676 \ 677 product(size_t, NUMAInterleaveGranularity, 2*M, \ 678 "Granularity to use for NUMA interleaving on Windows OS") \ 679 \ 680 product(bool, ForceNUMA, false, \ 681 "Force NUMA optimizations on single-node/UMA systems") \ 682 \ 683 product(uintx, NUMAChunkResizeWeight, 20, \ 684 "Percentage (0-100) used to weight the current sample when " \ 685 "computing exponentially decaying average for " \ 686 "AdaptiveNUMAChunkSizing") \ 687 range(0, 100) \ 688 \ 689 product(size_t, NUMASpaceResizeRate, 1*G, \ 690 "Do not reallocate more than this amount per collection") \ 691 \ 692 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 693 "Enable adaptive chunk sizing for NUMA") \ 694 \ 695 product(bool, NUMAStats, false, \ 696 "Print NUMA stats in detailed heap information") \ 697 \ 698 product(uintx, NUMAPageScanRate, 256, \ 699 "Maximum number of pages to include in the page scan procedure") \ 700 \ 701 product_pd(bool, NeedsDeoptSuspend, \ 702 "True for register window machines (sparc/ia64)") \ 703 \ 704 product(intx, UseSSE, 99, \ 705 "Highest supported SSE instructions set on x86/x64") \ 706 range(0, 99) \ 707 \ 708 product(bool, UseAES, false, \ 709 "Control whether AES instructions can be used on x86/x64") \ 710 \ 711 product(bool, UseSHA, false, \ 712 "Control whether SHA instructions can be used " \ 713 "on SPARC and on ARM") \ 714 \ 715 product(bool, UseGHASHIntrinsics, false, \ 716 "Use intrinsics for GHASH versions of crypto") \ 717 \ 718 product(size_t, LargePageSizeInBytes, 0, \ 719 "Large page size (0 to let VM choose the page size)") \ 720 \ 721 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 722 "Use large pages if maximum heap is at least this big") \ 723 \ 724 product(bool, ForceTimeHighResolution, false, \ 725 "Using high time resolution (for Win32 only)") \ 726 \ 727 develop(bool, TraceItables, false, \ 728 "Trace initialization and use of itables") \ 729 \ 730 develop(bool, TracePcPatching, false, \ 731 "Trace usage of frame::patch_pc") \ 732 \ 733 develop(bool, TraceJumps, false, \ 734 "Trace assembly jumps in thread ring buffer") \ 735 \ 736 develop(bool, TraceRelocator, false, \ 737 "Trace the bytecode relocator") \ 738 \ 739 develop(bool, TraceLongCompiles, false, \ 740 "Print out every time compilation is longer than " \ 741 "a given threshold") \ 742 \ 743 develop(bool, SafepointALot, false, \ 744 "Generate a lot of safepoints. This works with " \ 745 "GuaranteedSafepointInterval") \ 746 \ 747 product_pd(bool, BackgroundCompilation, \ 748 "A thread requesting compilation is not blocked during " \ 749 "compilation") \ 750 \ 751 product(bool, PrintVMQWaitTime, false, \ 752 "Print out the waiting time in VM operation queue") \ 753 \ 754 develop(bool, TraceOopMapGeneration, false, \ 755 "Show OopMapGeneration") \ 756 \ 757 product(bool, MethodFlushing, true, \ 758 "Reclamation of zombie and not-entrant methods") \ 759 \ 760 develop(bool, VerifyStack, false, \ 761 "Verify stack of each thread when it is entering a runtime call") \ 762 \ 763 diagnostic(bool, ForceUnreachable, false, \ 764 "Make all non code cache addresses to be unreachable by " \ 765 "forcing use of 64bit literal fixups") \ 766 \ 767 notproduct(bool, StressDerivedPointers, false, \ 768 "Force scavenge when a derived pointer is detected on stack " \ 769 "after rtm call") \ 770 \ 771 develop(bool, TraceDerivedPointers, false, \ 772 "Trace traversal of derived pointers on stack") \ 773 \ 774 notproduct(bool, TraceCodeBlobStacks, false, \ 775 "Trace stack-walk of codeblobs") \ 776 \ 777 product(bool, PrintJNIResolving, false, \ 778 "Used to implement -v:jni") \ 779 \ 780 notproduct(bool, PrintRewrites, false, \ 781 "Print methods that are being rewritten") \ 782 \ 783 product(bool, UseInlineCaches, true, \ 784 "Use Inline Caches for virtual calls ") \ 785 \ 786 develop(bool, InlineArrayCopy, true, \ 787 "Inline arraycopy native that is known to be part of " \ 788 "base library DLL") \ 789 \ 790 develop(bool, InlineObjectHash, true, \ 791 "Inline Object::hashCode() native that is known to be part " \ 792 "of base library DLL") \ 793 \ 794 develop(bool, InlineNatives, true, \ 795 "Inline natives that are known to be part of base library DLL") \ 796 \ 797 develop(bool, InlineMathNatives, true, \ 798 "Inline SinD, CosD, etc.") \ 799 \ 800 develop(bool, InlineClassNatives, true, \ 801 "Inline Class.isInstance, etc") \ 802 \ 803 develop(bool, InlineThreadNatives, true, \ 804 "Inline Thread.currentThread, etc") \ 805 \ 806 develop(bool, InlineUnsafeOps, true, \ 807 "Inline memory ops (native methods) from sun.misc.Unsafe") \ 808 \ 809 product(bool, CriticalJNINatives, true, \ 810 "Check for critical JNI entry points") \ 811 \ 812 notproduct(bool, StressCriticalJNINatives, false, \ 813 "Exercise register saving code in critical natives") \ 814 \ 815 product(bool, UseSSE42Intrinsics, false, \ 816 "SSE4.2 versions of intrinsics") \ 817 \ 818 product(bool, UseAESIntrinsics, false, \ 819 "Use intrinsics for AES versions of crypto") \ 820 \ 821 product(bool, UseSHA1Intrinsics, false, \ 822 "Use intrinsics for SHA-1 crypto hash function. " \ 823 "Requires that UseSHA is enabled.") \ 824 \ 825 product(bool, UseSHA256Intrinsics, false, \ 826 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 827 "Requires that UseSHA is enabled.") \ 828 \ 829 product(bool, UseSHA512Intrinsics, false, \ 830 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 831 "Requires that UseSHA is enabled.") \ 832 \ 833 product(bool, UseCRC32Intrinsics, false, \ 834 "use intrinsics for java.util.zip.CRC32") \ 835 \ 836 product(bool, UseCRC32CIntrinsics, false, \ 837 "use intrinsics for java.util.zip.CRC32C") \ 838 \ 839 product(bool, UseAdler32Intrinsics, false, \ 840 "use intrinsics for java.util.zip.Adler32") \ 841 \ 842 diagnostic(ccstrlist, DisableIntrinsic, "", \ 843 "do not expand intrinsics whose (internal) names appear here") \ 844 \ 845 develop(bool, TraceCallFixup, false, \ 846 "Trace all call fixups") \ 847 \ 848 develop(bool, DeoptimizeALot, false, \ 849 "Deoptimize at every exit from the runtime system") \ 850 \ 851 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 852 "A comma separated list of bcis to deoptimize at") \ 853 \ 854 product(bool, DeoptimizeRandom, false, \ 855 "Deoptimize random frames on random exit from the runtime system")\ 856 \ 857 notproduct(bool, ZombieALot, false, \ 858 "Create zombies (non-entrant) at exit from the runtime system") \ 859 \ 860 product(bool, UnlinkSymbolsALot, false, \ 861 "Unlink unreferenced symbols from the symbol table at safepoints")\ 862 \ 863 notproduct(bool, WalkStackALot, false, \ 864 "Trace stack (no print) at every exit from the runtime system") \ 865 \ 866 product(bool, Debugging, false, \ 867 "Set when executing debug methods in debug.cpp " \ 868 "(to prevent triggering assertions)") \ 869 \ 870 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 871 "Enable strict checks that safepoints cannot happen for threads " \ 872 "that use No_Safepoint_Verifier") \ 873 \ 874 notproduct(bool, VerifyLastFrame, false, \ 875 "Verify oops on last frame on entry to VM") \ 876 \ 877 develop(bool, TraceHandleAllocation, false, \ 878 "Print out warnings when suspiciously many handles are allocated")\ 879 \ 880 product(bool, FailOverToOldVerifier, true, \ 881 "Fail over to old verifier when split verifier fails") \ 882 \ 883 develop(bool, ShowSafepointMsgs, false, \ 884 "Show message about safepoint synchronization") \ 885 \ 886 product(bool, SafepointTimeout, false, \ 887 "Time out and warn or fail after SafepointTimeoutDelay " \ 888 "milliseconds if failed to reach safepoint") \ 889 \ 890 develop(bool, DieOnSafepointTimeout, false, \ 891 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 892 \ 893 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 894 /* typically, at most a few retries are needed */ \ 895 product(intx, SuspendRetryCount, 50, \ 896 "Maximum retry count for an external suspend request") \ 897 range(0, max_intx) \ 898 \ 899 product(intx, SuspendRetryDelay, 5, \ 900 "Milliseconds to delay per retry (* current_retry_count)") \ 901 range(0, max_intx) \ 902 \ 903 product(bool, AssertOnSuspendWaitFailure, false, \ 904 "Assert/Guarantee on external suspend wait failure") \ 905 \ 906 product(bool, TraceSuspendWaitFailures, false, \ 907 "Trace external suspend wait failures") \ 908 \ 909 product(bool, MaxFDLimit, true, \ 910 "Bump the number of file descriptors to maximum in Solaris") \ 911 \ 912 diagnostic(bool, LogEvents, true, \ 913 "Enable the various ring buffer event logs") \ 914 \ 915 diagnostic(uintx, LogEventsBufferEntries, 10, \ 916 "Number of ring buffer event logs") \ 917 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 918 \ 919 product(bool, BytecodeVerificationRemote, true, \ 920 "Enable the Java bytecode verifier for remote classes") \ 921 \ 922 product(bool, BytecodeVerificationLocal, false, \ 923 "Enable the Java bytecode verifier for local classes") \ 924 \ 925 develop(bool, ForceFloatExceptions, trueInDebug, \ 926 "Force exceptions on FP stack under/overflow") \ 927 \ 928 develop(bool, VerifyStackAtCalls, false, \ 929 "Verify that the stack pointer is unchanged after calls") \ 930 \ 931 develop(bool, TraceJavaAssertions, false, \ 932 "Trace java language assertions") \ 933 \ 934 notproduct(bool, CheckAssertionStatusDirectives, false, \ 935 "Temporary - see javaClasses.cpp") \ 936 \ 937 notproduct(bool, PrintMallocFree, false, \ 938 "Trace calls to C heap malloc/free allocation") \ 939 \ 940 product(bool, PrintOopAddress, false, \ 941 "Always print the location of the oop") \ 942 \ 943 notproduct(bool, VerifyCodeCache, false, \ 944 "Verify code cache on memory allocation/deallocation") \ 945 \ 946 develop(bool, UseMallocOnly, false, \ 947 "Use only malloc/free for allocation (no resource area/arena)") \ 948 \ 949 develop(bool, PrintMalloc, false, \ 950 "Print all malloc/free calls") \ 951 \ 952 develop(bool, PrintMallocStatistics, false, \ 953 "Print malloc/free statistics") \ 954 \ 955 develop(bool, ZapResourceArea, trueInDebug, \ 956 "Zap freed resource/arena space with 0xABABABAB") \ 957 \ 958 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 959 "Zap freed VM handle space with 0xBCBCBCBC") \ 960 \ 961 develop(bool, ZapJNIHandleArea, trueInDebug, \ 962 "Zap freed JNI handle space with 0xFEFEFEFE") \ 963 \ 964 notproduct(bool, ZapStackSegments, trueInDebug, \ 965 "Zap allocated/freed stack segments with 0xFADFADED") \ 966 \ 967 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 968 "Zap unused heap space with 0xBAADBABE") \ 969 \ 970 develop(bool, TraceZapUnusedHeapArea, false, \ 971 "Trace zapping of unused heap space") \ 972 \ 973 develop(bool, CheckZapUnusedHeapArea, false, \ 974 "Check zapping of unused heap space") \ 975 \ 976 develop(bool, ZapFillerObjects, trueInDebug, \ 977 "Zap filler objects with 0xDEAFBABE") \ 978 \ 979 develop(bool, PrintVMMessages, true, \ 980 "Print VM messages on console") \ 981 \ 982 product(bool, PrintGCApplicationConcurrentTime, false, \ 983 "Print the time the application has been running") \ 984 \ 985 product(bool, PrintGCApplicationStoppedTime, false, \ 986 "Print the time the application has been stopped") \ 987 \ 988 diagnostic(bool, VerboseVerification, false, \ 989 "Display detailed verification details") \ 990 \ 991 notproduct(uintx, ErrorHandlerTest, 0, \ 992 "If > 0, provokes an error after VM initialization; the value " \ 993 "determines which error to provoke. See test_error_handler() " \ 994 "in debug.cpp.") \ 995 \ 996 notproduct(uintx, TestCrashInErrorHandler, 0, \ 997 "If > 0, provokes an error inside VM error handler (a secondary " \ 998 "crash). see test_error_handler() in debug.cpp.") \ 999 \ 1000 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 1001 "If true, tests SafeFetch inside error handler.") \ 1002 \ 1003 develop(bool, Verbose, false, \ 1004 "Print additional debugging information from other modes") \ 1005 \ 1006 develop(bool, PrintMiscellaneous, false, \ 1007 "Print uncategorized debugging information (requires +Verbose)") \ 1008 \ 1009 develop(bool, WizardMode, false, \ 1010 "Print much more debugging information") \ 1011 \ 1012 product(bool, ShowMessageBoxOnError, false, \ 1013 "Keep process alive on VM fatal error") \ 1014 \ 1015 product(bool, CreateCoredumpOnCrash, true, \ 1016 "Create core/mini dump on VM fatal error") \ 1017 \ 1018 product(uintx, ErrorLogTimeout, 2 * 60, \ 1019 "Timeout, in seconds, to limit the time spent on writing an " \ 1020 "error log in case of a crash.") \ 1021 \ 1022 product_pd(bool, UseOSErrorReporting, \ 1023 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 1024 \ 1025 product(bool, SuppressFatalErrorMessage, false, \ 1026 "Report NO fatal error message (avoid deadlock)") \ 1027 \ 1028 product(ccstrlist, OnError, "", \ 1029 "Run user-defined commands on fatal error; see VMError.cpp " \ 1030 "for examples") \ 1031 \ 1032 product(ccstrlist, OnOutOfMemoryError, "", \ 1033 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 1034 \ 1035 manageable(bool, HeapDumpBeforeFullGC, false, \ 1036 "Dump heap to file before any major stop-the-world GC") \ 1037 \ 1038 manageable(bool, HeapDumpAfterFullGC, false, \ 1039 "Dump heap to file after any major stop-the-world GC") \ 1040 \ 1041 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 1042 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 1043 \ 1044 manageable(ccstr, HeapDumpPath, NULL, \ 1045 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 1046 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 1047 "in the working directory)") \ 1048 \ 1049 develop(size_t, SegmentedHeapDumpThreshold, 2*G, \ 1050 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 1051 "when the heap usage is larger than this") \ 1052 \ 1053 develop(size_t, HeapDumpSegmentSize, 1*G, \ 1054 "Approximate segment size when generating a segmented heap dump") \ 1055 \ 1056 develop(bool, BreakAtWarning, false, \ 1057 "Execute breakpoint upon encountering VM warning") \ 1058 \ 1059 develop(bool, TraceVMOperation, false, \ 1060 "Trace VM operations") \ 1061 \ 1062 develop(bool, UseFakeTimers, false, \ 1063 "Tell whether the VM should use system time or a fake timer") \ 1064 \ 1065 product(ccstr, NativeMemoryTracking, "off", \ 1066 "Native memory tracking options") \ 1067 \ 1068 diagnostic(bool, PrintNMTStatistics, false, \ 1069 "Print native memory tracking summary data if it is on") \ 1070 \ 1071 diagnostic(bool, LogCompilation, false, \ 1072 "Log compilation activity in detail to LogFile") \ 1073 \ 1074 product(bool, PrintCompilation, false, \ 1075 "Print compilations") \ 1076 \ 1077 diagnostic(bool, TraceNMethodInstalls, false, \ 1078 "Trace nmethod installation") \ 1079 \ 1080 diagnostic(intx, ScavengeRootsInCode, 2, \ 1081 "0: do not allow scavengable oops in the code cache; " \ 1082 "1: allow scavenging from the code cache; " \ 1083 "2: emit as many constants as the compiler can see") \ 1084 range(0, 2) \ 1085 \ 1086 product(bool, AlwaysRestoreFPU, false, \ 1087 "Restore the FPU control word after every JNI call (expensive)") \ 1088 \ 1089 diagnostic(bool, PrintCompilation2, false, \ 1090 "Print additional statistics per compilation") \ 1091 \ 1092 diagnostic(bool, PrintAdapterHandlers, false, \ 1093 "Print code generated for i2c/c2i adapters") \ 1094 \ 1095 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 1096 "Verify that i2c/c2i adapters are called properly") \ 1097 \ 1098 develop(bool, VerifyAdapterSharing, false, \ 1099 "Verify that the code for shared adapters is the equivalent") \ 1100 \ 1101 diagnostic(bool, PrintAssembly, false, \ 1102 "Print assembly code (using external disassembler.so)") \ 1103 \ 1104 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 1105 "Print options string passed to disassembler.so") \ 1106 \ 1107 notproduct(bool, PrintNMethodStatistics, false, \ 1108 "Print a summary statistic for the generated nmethods") \ 1109 \ 1110 diagnostic(bool, PrintNMethods, false, \ 1111 "Print assembly code for nmethods when generated") \ 1112 \ 1113 diagnostic(intx, PrintNMethodsAtLevel, -1, \ 1114 "Only print code for nmethods at the given compilation level") \ 1115 \ 1116 diagnostic(bool, PrintNativeNMethods, false, \ 1117 "Print assembly code for native nmethods when generated") \ 1118 \ 1119 develop(bool, PrintDebugInfo, false, \ 1120 "Print debug information for all nmethods when generated") \ 1121 \ 1122 develop(bool, PrintRelocations, false, \ 1123 "Print relocation information for all nmethods when generated") \ 1124 \ 1125 develop(bool, PrintDependencies, false, \ 1126 "Print dependency information for all nmethods when generated") \ 1127 \ 1128 develop(bool, PrintExceptionHandlers, false, \ 1129 "Print exception handler tables for all nmethods when generated") \ 1130 \ 1131 develop(bool, StressCompiledExceptionHandlers, false, \ 1132 "Exercise compiled exception handlers") \ 1133 \ 1134 develop(bool, InterceptOSException, false, \ 1135 "Start debugger when an implicit OS (e.g. NULL) " \ 1136 "exception happens") \ 1137 \ 1138 product(bool, PrintCodeCache, false, \ 1139 "Print the code cache memory usage when exiting") \ 1140 \ 1141 develop(bool, PrintCodeCache2, false, \ 1142 "Print detailed usage information on the code cache when exiting")\ 1143 \ 1144 product(bool, PrintCodeCacheOnCompilation, false, \ 1145 "Print the code cache memory usage each time a method is " \ 1146 "compiled") \ 1147 \ 1148 diagnostic(bool, PrintStubCode, false, \ 1149 "Print generated stub code") \ 1150 \ 1151 product(bool, StackTraceInThrowable, true, \ 1152 "Collect backtrace in throwable when exception happens") \ 1153 \ 1154 product(bool, OmitStackTraceInFastThrow, true, \ 1155 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1156 \ 1157 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1158 "Print bytecode statistics when dumping profiler output") \ 1159 \ 1160 product(bool, ProfilerRecordPC, false, \ 1161 "Collect ticks for each 16 byte interval of compiled code") \ 1162 \ 1163 product(bool, ProfileVM, false, \ 1164 "Profile ticks that fall within VM (either in the VM Thread " \ 1165 "or VM code called through stubs)") \ 1166 \ 1167 product(bool, ProfileIntervals, false, \ 1168 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1169 \ 1170 notproduct(bool, ProfilerCheckIntervals, false, \ 1171 "Collect and print information on spacing of profiler ticks") \ 1172 \ 1173 product(bool, PrintWarnings, true, \ 1174 "Print JVM warnings to output stream") \ 1175 \ 1176 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1177 "Print warnings for stalled SpinLocks") \ 1178 \ 1179 product(bool, RegisterFinalizersAtInit, true, \ 1180 "Register finalizable objects at end of Object.<init> or " \ 1181 "after allocation") \ 1182 \ 1183 develop(bool, RegisterReferences, true, \ 1184 "Tell whether the VM should register soft/weak/final/phantom " \ 1185 "references") \ 1186 \ 1187 develop(bool, IgnoreRewrites, false, \ 1188 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1189 "This is unsafe!") \ 1190 \ 1191 develop(bool, PrintCodeCacheExtension, false, \ 1192 "Print extension of code cache") \ 1193 \ 1194 develop(bool, UsePrivilegedStack, true, \ 1195 "Enable the security JVM functions") \ 1196 \ 1197 develop(bool, ProtectionDomainVerification, true, \ 1198 "Verify protection domain before resolution in system dictionary")\ 1199 \ 1200 product(bool, ClassUnloading, true, \ 1201 "Do unloading of classes") \ 1202 \ 1203 product(bool, ClassUnloadingWithConcurrentMark, true, \ 1204 "Do unloading of classes with a concurrent marking cycle") \ 1205 \ 1206 develop(bool, DisableStartThread, false, \ 1207 "Disable starting of additional Java threads " \ 1208 "(for debugging only)") \ 1209 \ 1210 develop(bool, MemProfiling, false, \ 1211 "Write memory usage profiling to log file") \ 1212 \ 1213 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1214 "Print the system dictionary at exit") \ 1215 \ 1216 experimental(intx, PredictedLoadedClassCount, 0, \ 1217 "Experimental: Tune loaded class cache starting size") \ 1218 \ 1219 diagnostic(bool, UnsyncloadClass, false, \ 1220 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1221 "class loader must call VM synchronized for findClass " \ 1222 "and defineClass.") \ 1223 \ 1224 product(bool, AlwaysLockClassLoader, false, \ 1225 "Require the VM to acquire the class loader lock before calling " \ 1226 "loadClass() even for class loaders registering " \ 1227 "as parallel capable") \ 1228 \ 1229 product(bool, AllowParallelDefineClass, false, \ 1230 "Allow parallel defineClass requests for class loaders " \ 1231 "registering as parallel capable") \ 1232 \ 1233 product(bool, MustCallLoadClassInternal, false, \ 1234 "Call loadClassInternal() rather than loadClass()") \ 1235 \ 1236 product_pd(bool, DontYieldALot, \ 1237 "Throw away obvious excess yield calls") \ 1238 \ 1239 product_pd(bool, ConvertSleepToYield, \ 1240 "Convert sleep(0) to thread yield " \ 1241 "(may be off for Solaris to improve GUI)") \ 1242 \ 1243 product(bool, ConvertYieldToSleep, false, \ 1244 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1245 "behavior") \ 1246 \ 1247 develop(bool, UseDetachedThreads, true, \ 1248 "Use detached threads that are recycled upon termination " \ 1249 "(for Solaris only)") \ 1250 \ 1251 product(bool, UseLWPSynchronization, true, \ 1252 "Use LWP-based instead of libthread-based synchronization " \ 1253 "(SPARC only)") \ 1254 \ 1255 experimental(ccstr, SyncKnobs, NULL, \ 1256 "(Unstable) Various monitor synchronization tunables") \ 1257 \ 1258 experimental(intx, EmitSync, 0, \ 1259 "(Unsafe, Unstable) " \ 1260 "Control emission of inline sync fast-path code") \ 1261 \ 1262 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1263 range(0, max_jint) \ 1264 \ 1265 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1266 \ 1267 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1268 "Experimental Sync flags") \ 1269 \ 1270 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1271 \ 1272 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \ 1273 \ 1274 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1275 \ 1276 experimental(intx, hashCode, 5, \ 1277 "(Unstable) select hashCode generation algorithm") \ 1278 \ 1279 experimental(intx, WorkAroundNPTLTimedWaitHang, 0, \ 1280 "(Unstable, Linux-specific) " \ 1281 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \ 1282 \ 1283 product(bool, FilterSpuriousWakeups, true, \ 1284 "When true prevents OS-level spurious, or premature, wakeups " \ 1285 "from Object.wait (Ignored for Windows)") \ 1286 \ 1287 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1288 \ 1289 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1290 \ 1291 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1292 \ 1293 develop(bool, UsePthreads, false, \ 1294 "Use pthread-based instead of libthread-based synchronization " \ 1295 "(SPARC only)") \ 1296 \ 1297 product(bool, ReduceSignalUsage, false, \ 1298 "Reduce the use of OS signals in Java and/or the VM") \ 1299 \ 1300 develop_pd(bool, ShareVtableStubs, \ 1301 "Share vtable stubs (smaller code but worse branch prediction") \ 1302 \ 1303 develop(bool, LoadLineNumberTables, true, \ 1304 "Tell whether the class file parser loads line number tables") \ 1305 \ 1306 develop(bool, LoadLocalVariableTables, true, \ 1307 "Tell whether the class file parser loads local variable tables") \ 1308 \ 1309 develop(bool, LoadLocalVariableTypeTables, true, \ 1310 "Tell whether the class file parser loads local variable type" \ 1311 "tables") \ 1312 \ 1313 product(bool, AllowUserSignalHandlers, false, \ 1314 "Do not complain if the application installs signal handlers " \ 1315 "(Solaris & Linux only)") \ 1316 \ 1317 product(bool, UseSignalChaining, true, \ 1318 "Use signal-chaining to invoke signal handlers installed " \ 1319 "by the application (Solaris & Linux only)") \ 1320 \ 1321 product(bool, UseAltSigs, false, \ 1322 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1323 "internal signals (Solaris only)") \ 1324 \ 1325 product(bool, AllowJNIEnvProxy, false, \ 1326 "Allow JNIEnv proxies for jdbx") \ 1327 \ 1328 product(bool, JNIDetachReleasesMonitors, true, \ 1329 "JNI DetachCurrentThread releases monitors owned by thread") \ 1330 \ 1331 product(bool, RestoreMXCSROnJNICalls, false, \ 1332 "Restore MXCSR when returning from JNI calls") \ 1333 \ 1334 product(bool, CheckJNICalls, false, \ 1335 "Verify all arguments to JNI calls") \ 1336 \ 1337 product(bool, CheckEndorsedAndExtDirs, false, \ 1338 "Verify the endorsed and extension directories are not used") \ 1339 \ 1340 product(bool, UseFastJNIAccessors, true, \ 1341 "Use optimized versions of Get<Primitive>Field") \ 1342 \ 1343 product(intx, MaxJNILocalCapacity, 65536, \ 1344 "Maximum allowable local JNI handle capacity to " \ 1345 "EnsureLocalCapacity() and PushLocalFrame(), " \ 1346 "where <= 0 is unlimited, default: 65536") \ 1347 range(min_intx, max_intx) \ 1348 \ 1349 product(bool, EagerXrunInit, false, \ 1350 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1351 "but not all -Xrun libraries may support the state of the VM " \ 1352 "at this time") \ 1353 \ 1354 product(bool, PreserveAllAnnotations, false, \ 1355 "Preserve RuntimeInvisibleAnnotations as well " \ 1356 "as RuntimeVisibleAnnotations") \ 1357 \ 1358 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1359 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1360 \ 1361 product(bool, UseXMMForArrayCopy, false, \ 1362 "Use SSE2 MOVQ instruction for Arraycopy") \ 1363 \ 1364 product(intx, FieldsAllocationStyle, 1, \ 1365 "0 - type based with oops first, " \ 1366 "1 - with oops last, " \ 1367 "2 - oops in super and sub classes are together") \ 1368 range(0, 2) \ 1369 \ 1370 product(bool, CompactFields, true, \ 1371 "Allocate nonstatic fields in gaps between previous fields") \ 1372 \ 1373 notproduct(bool, PrintFieldLayout, false, \ 1374 "Print field layout for each class") \ 1375 \ 1376 /* Need to limit the extent of the padding to reasonable size. */\ 1377 /* 8K is well beyond the reasonable HW cache line size, even with */\ 1378 /* aggressive prefetching, while still leaving the room for segregating */\ 1379 /* among the distinct pages. */\ 1380 product(intx, ContendedPaddingWidth, 128, \ 1381 "How many bytes to pad the fields/classes marked @Contended with")\ 1382 range(0, 8192) \ 1383 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 1384 \ 1385 product(bool, EnableContended, true, \ 1386 "Enable @Contended annotation support") \ 1387 \ 1388 product(bool, RestrictContended, true, \ 1389 "Restrict @Contended to trusted classes") \ 1390 \ 1391 product(bool, UseBiasedLocking, true, \ 1392 "Enable biased locking in JVM") \ 1393 \ 1394 product(intx, BiasedLockingStartupDelay, 4000, \ 1395 "Number of milliseconds to wait before enabling biased locking") \ 1396 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 1397 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 1398 \ 1399 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1400 "Print statistics of biased locking in JVM") \ 1401 \ 1402 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1403 "Threshold of number of revocations per type to try to " \ 1404 "rebias all objects in the heap of that type") \ 1405 range(0, max_intx) \ 1406 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 1407 \ 1408 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1409 "Threshold of number of revocations per type to permanently " \ 1410 "revoke biases of all objects in the heap of that type") \ 1411 range(0, max_intx) \ 1412 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 1413 \ 1414 product(intx, BiasedLockingDecayTime, 25000, \ 1415 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1416 "type after previous bulk rebias") \ 1417 range(500, max_intx) \ 1418 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 1419 \ 1420 /* tracing */ \ 1421 \ 1422 notproduct(bool, TraceRuntimeCalls, false, \ 1423 "Trace run-time calls") \ 1424 \ 1425 develop(bool, TraceJNICalls, false, \ 1426 "Trace JNI calls") \ 1427 \ 1428 develop(bool, StressRewriter, false, \ 1429 "Stress linktime bytecode rewriting") \ 1430 \ 1431 notproduct(bool, TraceJVMCalls, false, \ 1432 "Trace JVM calls") \ 1433 \ 1434 product(ccstr, TraceJVMTI, NULL, \ 1435 "Trace flags for JVMTI functions and events") \ 1436 \ 1437 /* This option can change an EMCP method into an obsolete method. */ \ 1438 /* This can affect tests that except specific methods to be EMCP. */ \ 1439 /* This option should be used with caution. */ \ 1440 product(bool, StressLdcRewrite, false, \ 1441 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1442 \ 1443 product(uintx, TraceRedefineClasses, 0, \ 1444 "Trace level for JVMTI RedefineClasses") \ 1445 range(0, 0xFFFFFFFF) \ 1446 \ 1447 /* change to false by default sometime after Mustang */ \ 1448 product(bool, VerifyMergedCPBytecodes, true, \ 1449 "Verify bytecodes after RedefineClasses constant pool merging") \ 1450 \ 1451 develop(bool, TraceJNIHandleAllocation, false, \ 1452 "Trace allocation/deallocation of JNI handle blocks") \ 1453 \ 1454 develop(bool, TraceBytecodes, false, \ 1455 "Trace bytecode execution") \ 1456 \ 1457 develop(bool, TraceClassInitialization, false, \ 1458 "Trace class initialization") \ 1459 \ 1460 product(bool, TraceExceptions, false, \ 1461 "Trace exceptions") \ 1462 \ 1463 develop(bool, TraceICs, false, \ 1464 "Trace inline cache changes") \ 1465 \ 1466 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1467 "Trace method invocation counter overflow") \ 1468 \ 1469 develop(bool, TraceInlineCacheClearing, false, \ 1470 "Trace clearing of inline caches in nmethods") \ 1471 \ 1472 develop(bool, TraceDependencies, false, \ 1473 "Trace dependencies") \ 1474 \ 1475 develop(bool, VerifyDependencies, trueInDebug, \ 1476 "Exercise and verify the compilation dependency mechanism") \ 1477 \ 1478 develop(bool, TraceNewOopMapGeneration, false, \ 1479 "Trace OopMapGeneration") \ 1480 \ 1481 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1482 "Trace OopMapGeneration: print detailed cell states") \ 1483 \ 1484 develop(bool, TimeOopMap, false, \ 1485 "Time calls to GenerateOopMap::compute_map() in sum") \ 1486 \ 1487 develop(bool, TimeOopMap2, false, \ 1488 "Time calls to GenerateOopMap::compute_map() individually") \ 1489 \ 1490 develop(bool, TraceMonitorMismatch, false, \ 1491 "Trace monitor matching failures during OopMapGeneration") \ 1492 \ 1493 develop(bool, TraceOopMapRewrites, false, \ 1494 "Trace rewriting of method oops during oop map generation") \ 1495 \ 1496 develop(bool, TraceSafepoint, false, \ 1497 "Trace safepoint operations") \ 1498 \ 1499 develop(bool, TraceICBuffer, false, \ 1500 "Trace usage of IC buffer") \ 1501 \ 1502 develop(bool, TraceCompiledIC, false, \ 1503 "Trace changes of compiled IC") \ 1504 \ 1505 develop(bool, TraceStartupTime, false, \ 1506 "Trace setup time") \ 1507 \ 1508 develop(bool, TraceProtectionDomainVerification, false, \ 1509 "Trace protection domain verification") \ 1510 \ 1511 develop(bool, TraceClearedExceptions, false, \ 1512 "Print when an exception is forcibly cleared") \ 1513 \ 1514 product(bool, TraceClassResolution, false, \ 1515 "Trace all constant pool resolutions (for debugging)") \ 1516 \ 1517 product(bool, TraceBiasedLocking, false, \ 1518 "Trace biased locking in JVM") \ 1519 \ 1520 product(bool, TraceMonitorInflation, false, \ 1521 "Trace monitor inflation in JVM") \ 1522 \ 1523 /* gc */ \ 1524 \ 1525 product(bool, UseSerialGC, false, \ 1526 "Use the Serial garbage collector") \ 1527 \ 1528 product(bool, UseG1GC, false, \ 1529 "Use the Garbage-First garbage collector") \ 1530 \ 1531 product(bool, UseParallelGC, false, \ 1532 "Use the Parallel Scavenge garbage collector") \ 1533 \ 1534 product(bool, UseParallelOldGC, false, \ 1535 "Use the Parallel Old garbage collector") \ 1536 \ 1537 product(uintx, HeapMaximumCompactionInterval, 20, \ 1538 "How often should we maximally compact the heap (not allowing " \ 1539 "any dead space)") \ 1540 \ 1541 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1542 "The collection count for the first maximum compaction") \ 1543 \ 1544 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1545 "Use maximum compaction in the Parallel Old garbage collector " \ 1546 "for a system GC") \ 1547 \ 1548 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1549 "The mean used by the parallel compact dead wood " \ 1550 "limiter (a number between 0-100)") \ 1551 range(0, 100) \ 1552 \ 1553 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1554 "The standard deviation used by the parallel compact dead wood " \ 1555 "limiter (a number between 0-100)") \ 1556 range(0, 100) \ 1557 \ 1558 product(uint, ParallelGCThreads, 0, \ 1559 "Number of parallel threads parallel gc will use") \ 1560 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \ 1561 \ 1562 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \ 1563 "Use semaphore synchronization for the GC Threads, " \ 1564 "instead of synchronization based on mutexes") \ 1565 \ 1566 product(bool, UseDynamicNumberOfGCThreads, false, \ 1567 "Dynamically choose the number of parallel threads " \ 1568 "parallel gc will use") \ 1569 \ 1570 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1571 "Force dynamic selection of the number of " \ 1572 "parallel threads parallel gc will use to aid debugging") \ 1573 \ 1574 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1575 "Size of heap (bytes) per GC thread used in calculating the " \ 1576 "number of GC threads") \ 1577 range((size_t)os::vm_page_size(), (size_t)max_uintx) \ 1578 \ 1579 product(bool, TraceDynamicGCThreads, false, \ 1580 "Trace the dynamic GC thread usage") \ 1581 \ 1582 product(uint, ConcGCThreads, 0, \ 1583 "Number of threads concurrent gc will use") \ 1584 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \ 1585 \ 1586 product(uintx, GCTaskTimeStampEntries, 200, \ 1587 "Number of time stamp entries per gc worker thread") \ 1588 range(1, max_uintx) \ 1589 \ 1590 product(bool, AlwaysTenure, false, \ 1591 "Always tenure objects in eden (ParallelGC only)") \ 1592 \ 1593 product(bool, NeverTenure, false, \ 1594 "Never tenure objects in eden, may tenure on overflow " \ 1595 "(ParallelGC only)") \ 1596 \ 1597 product(bool, ScavengeBeforeFullGC, true, \ 1598 "Scavenge youngest generation before each full GC.") \ 1599 \ 1600 product(bool, UseConcMarkSweepGC, false, \ 1601 "Use Concurrent Mark-Sweep GC in the old generation") \ 1602 \ 1603 product(bool, ExplicitGCInvokesConcurrent, false, \ 1604 "A System.gc() request invokes a concurrent collection; " \ 1605 "(effective only when using concurrent collectors)") \ 1606 \ 1607 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1608 "A System.gc() request invokes a concurrent collection and " \ 1609 "also unloads classes during such a concurrent gc cycle " \ 1610 "(effective only when UseConcMarkSweepGC)") \ 1611 \ 1612 product(bool, GCLockerInvokesConcurrent, false, \ 1613 "The exit of a JNI critical section necessitating a scavenge, " \ 1614 "also kicks off a background concurrent collection") \ 1615 \ 1616 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1617 "How much the GC can expand the eden by while the GC locker " \ 1618 "is active (as a percentage)") \ 1619 range(0, 100) \ 1620 \ 1621 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1622 "Number of times to retry allocations when " \ 1623 "blocked by the GC locker") \ 1624 \ 1625 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1626 "Use adaptive free lists in the CMS generation") \ 1627 \ 1628 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1629 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1630 \ 1631 product(bool, UseCMSBestFit, true, \ 1632 "Use CMS best fit allocation strategy") \ 1633 \ 1634 product(bool, UseParNewGC, false, \ 1635 "Use parallel threads in the new generation") \ 1636 \ 1637 product(bool, PrintTaskqueue, false, \ 1638 "Print taskqueue statistics for parallel collectors") \ 1639 \ 1640 product(bool, PrintTerminationStats, false, \ 1641 "Print termination statistics for parallel collectors") \ 1642 \ 1643 product(uintx, ParallelGCBufferWastePct, 10, \ 1644 "Wasted fraction of parallel allocation buffer") \ 1645 range(0, 100) \ 1646 \ 1647 product(uintx, TargetPLABWastePct, 10, \ 1648 "Target wasted space in last buffer as percent of overall " \ 1649 "allocation") \ 1650 range(1, 100) \ 1651 \ 1652 product(uintx, PLABWeight, 75, \ 1653 "Percentage (0-100) used to weight the current sample when " \ 1654 "computing exponentially decaying average for ResizePLAB") \ 1655 range(0, 100) \ 1656 \ 1657 product(bool, ResizePLAB, true, \ 1658 "Dynamically resize (survivor space) promotion LAB's") \ 1659 \ 1660 product(bool, PrintPLAB, false, \ 1661 "Print (survivor space) promotion LAB's sizing decisions") \ 1662 \ 1663 product(intx, ParGCArrayScanChunk, 50, \ 1664 "Scan a subset of object array and push remainder, if array is " \ 1665 "bigger than this") \ 1666 range(1, max_intx) \ 1667 \ 1668 product(bool, ParGCUseLocalOverflow, false, \ 1669 "Instead of a global overflow list, use local overflow stacks") \ 1670 \ 1671 product(bool, ParGCTrimOverflow, true, \ 1672 "Eagerly trim the local overflow lists " \ 1673 "(when ParGCUseLocalOverflow)") \ 1674 \ 1675 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1676 "Simulate work queue overflow in ParNew") \ 1677 \ 1678 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1679 "An `interval' counter that determines how frequently " \ 1680 "we simulate overflow; a smaller number increases frequency") \ 1681 \ 1682 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1683 "The desired number of objects to claim from the overflow list") \ 1684 \ 1685 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1686 "The number of strides per worker thread that we divide up the " \ 1687 "card table scanning work into") \ 1688 range(1, max_uintx) \ 1689 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \ 1690 \ 1691 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1692 "The number of cards in each chunk of the parallel chunks used " \ 1693 "during card table scanning") \ 1694 range(1, max_intx) \ 1695 \ 1696 product(uintx, OldPLABWeight, 50, \ 1697 "Percentage (0-100) used to weight the current sample when " \ 1698 "computing exponentially decaying average for resizing " \ 1699 "OldPLABSize") \ 1700 range(0, 100) \ 1701 \ 1702 product(bool, ResizeOldPLAB, true, \ 1703 "Dynamically resize (old gen) promotion LAB's") \ 1704 \ 1705 product(bool, PrintOldPLAB, false, \ 1706 "Print (old gen) promotion LAB's sizing decisions") \ 1707 \ 1708 product(size_t, CMSOldPLABMax, 1024, \ 1709 "Maximum size of CMS gen promotion LAB caches per worker " \ 1710 "per block size") \ 1711 range(1, max_uintx) \ 1712 constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \ 1713 \ 1714 product(size_t, CMSOldPLABMin, 16, \ 1715 "Minimum size of CMS gen promotion LAB caches per worker " \ 1716 "per block size") \ 1717 range(1, max_uintx) \ 1718 constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \ 1719 \ 1720 product(uintx, CMSOldPLABNumRefills, 4, \ 1721 "Nominal number of refills of CMS gen promotion LAB cache " \ 1722 "per worker per block size") \ 1723 range(1, max_uintx) \ 1724 \ 1725 product(bool, CMSOldPLABResizeQuicker, false, \ 1726 "React on-the-fly during a scavenge to a sudden " \ 1727 "change in block demand rate") \ 1728 \ 1729 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1730 "The tolerance of the phase-change detector for on-the-fly " \ 1731 "PLAB resizing during a scavenge") \ 1732 range(1, max_uintx) \ 1733 \ 1734 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1735 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1736 "during a scavenge") \ 1737 \ 1738 product(bool, AlwaysPreTouch, false, \ 1739 "Force all freshly committed pages to be pre-touched") \ 1740 \ 1741 product_pd(size_t, CMSYoungGenPerWorker, \ 1742 "The maximum size of young gen chosen by default per GC worker " \ 1743 "thread available") \ 1744 range(1, max_uintx) \ 1745 \ 1746 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1747 "Percentage (0-100) used to add conservatism when computing the " \ 1748 "duty cycle") \ 1749 range(0, 100) \ 1750 \ 1751 product(uintx, CMSExpAvgFactor, 50, \ 1752 "Percentage (0-100) used to weight the current sample when " \ 1753 "computing exponential averages for CMS statistics") \ 1754 range(0, 100) \ 1755 \ 1756 product(uintx, CMS_FLSWeight, 75, \ 1757 "Percentage (0-100) used to weight the current sample when " \ 1758 "computing exponentially decaying averages for CMS FLS " \ 1759 "statistics") \ 1760 range(0, 100) \ 1761 \ 1762 product(uintx, CMS_FLSPadding, 1, \ 1763 "The multiple of deviation from mean to use for buffering " \ 1764 "against volatility in free list demand") \ 1765 \ 1766 product(uintx, FLSCoalescePolicy, 2, \ 1767 "CMS: aggressiveness level for coalescing, increasing " \ 1768 "from 0 to 4") \ 1769 range(0, 4) \ 1770 \ 1771 product(bool, FLSAlwaysCoalesceLarge, false, \ 1772 "CMS: larger free blocks are always available for coalescing") \ 1773 \ 1774 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1775 "CMS: the smaller the percentage the greater the coalescing " \ 1776 "force") \ 1777 range(0.0, 1.0) \ 1778 \ 1779 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1780 "CMS: the factor by which to inflate estimated demand of small " \ 1781 "block sizes to prevent coalescing with an adjoining block") \ 1782 range(0.0, DBL_MAX) \ 1783 \ 1784 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1785 "CMS: the factor by which to inflate estimated demand of large " \ 1786 "block sizes to prevent coalescing with an adjoining block") \ 1787 range(0.0, DBL_MAX) \ 1788 \ 1789 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1790 "CMS: the factor by which to inflate estimated demand of small " \ 1791 "block sizes to prevent splitting to supply demand for smaller " \ 1792 "blocks") \ 1793 range(0.0, DBL_MAX) \ 1794 \ 1795 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1796 "CMS: the factor by which to inflate estimated demand of large " \ 1797 "block sizes to prevent splitting to supply demand for smaller " \ 1798 "blocks") \ 1799 range(0.0, DBL_MAX) \ 1800 \ 1801 product(bool, CMSExtrapolateSweep, false, \ 1802 "CMS: cushion for block demand during sweep") \ 1803 \ 1804 product(uintx, CMS_SweepWeight, 75, \ 1805 "Percentage (0-100) used to weight the current sample when " \ 1806 "computing exponentially decaying average for inter-sweep " \ 1807 "duration") \ 1808 range(0, 100) \ 1809 \ 1810 product(uintx, CMS_SweepPadding, 1, \ 1811 "The multiple of deviation from mean to use for buffering " \ 1812 "against volatility in inter-sweep duration") \ 1813 \ 1814 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1815 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1816 "duration exceeds this threshold in milliseconds") \ 1817 \ 1818 product(bool, CMSClassUnloadingEnabled, true, \ 1819 "Whether class unloading enabled when using CMS GC") \ 1820 \ 1821 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1822 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1823 "count for which classes may not be unloaded") \ 1824 \ 1825 develop(intx, CMSDictionaryChoice, 0, \ 1826 "Use BinaryTreeDictionary as default in the CMS generation") \ 1827 range(0, 2) \ 1828 \ 1829 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1830 "Replenish an indexed free list with this number of chunks") \ 1831 range(1, max_uintx) \ 1832 \ 1833 product(bool, CMSReplenishIntermediate, true, \ 1834 "Replenish all intermediate free-list caches") \ 1835 \ 1836 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1837 "When satisfying batched demand, split blocks from the " \ 1838 "IndexedFreeList whose size is a multiple of requested size") \ 1839 \ 1840 product(bool, CMSLoopWarn, false, \ 1841 "Warn in case of excessive CMS looping") \ 1842 \ 1843 develop(bool, CMSOverflowEarlyRestoration, false, \ 1844 "Restore preserved marks early") \ 1845 \ 1846 /* where does the range max value of (max_jint - 1) come from? */ \ 1847 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1848 "Maximum size of marking stack") \ 1849 range(1, (max_jint - 1)) \ 1850 \ 1851 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1852 "Size of marking stack") \ 1853 constraint(MarkStackSizeConstraintFunc,AfterErgo) \ 1854 \ 1855 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1856 "Simulate frequent marking stack / work queue overflow") \ 1857 \ 1858 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1859 "An \"interval\" counter that determines how frequently " \ 1860 "to simulate overflow; a smaller number increases frequency") \ 1861 \ 1862 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1863 "Maximum number of abortable preclean iterations, if > 0") \ 1864 \ 1865 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1866 "Maximum time in abortable preclean (in milliseconds)") \ 1867 range(0, max_intx) \ 1868 \ 1869 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1870 "Nominal minimum work per abortable preclean iteration") \ 1871 \ 1872 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1873 "Time that we sleep between iterations when not given " \ 1874 "enough work per iteration") \ 1875 range(0, max_intx) \ 1876 \ 1877 product(size_t, CMSRescanMultiple, 32, \ 1878 "Size (in cards) of CMS parallel rescan task") \ 1879 range(1, max_uintx) \ 1880 \ 1881 product(size_t, CMSConcMarkMultiple, 32, \ 1882 "Size (in cards) of CMS concurrent MT marking task") \ 1883 range(1, max_uintx) \ 1884 \ 1885 product(bool, CMSAbortSemantics, false, \ 1886 "Whether abort-on-overflow semantics is implemented") \ 1887 \ 1888 product(bool, CMSParallelInitialMarkEnabled, true, \ 1889 "Use the parallel initial mark.") \ 1890 \ 1891 product(bool, CMSParallelRemarkEnabled, true, \ 1892 "Whether parallel remark enabled (only if ParNewGC)") \ 1893 \ 1894 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1895 "Whether parallel remark of survivor space " \ 1896 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1897 \ 1898 product(bool, CMSPLABRecordAlways, true, \ 1899 "Always record survivor space PLAB boundaries (effective only " \ 1900 "if CMSParallelSurvivorRemarkEnabled)") \ 1901 \ 1902 product(bool, CMSEdenChunksRecordAlways, true, \ 1903 "Always record eden chunks used for the parallel initial mark " \ 1904 "or remark of eden") \ 1905 \ 1906 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1907 "Print the eden and the survivor chunks used for the parallel " \ 1908 "initial mark or remark of the eden/survivor spaces") \ 1909 \ 1910 product(bool, CMSConcurrentMTEnabled, true, \ 1911 "Whether multi-threaded concurrent work enabled " \ 1912 "(effective only if ParNewGC)") \ 1913 \ 1914 product(bool, CMSPrecleaningEnabled, true, \ 1915 "Whether concurrent precleaning enabled") \ 1916 \ 1917 product(uintx, CMSPrecleanIter, 3, \ 1918 "Maximum number of precleaning iteration passes") \ 1919 range(0, 9) \ 1920 \ 1921 product(uintx, CMSPrecleanDenominator, 3, \ 1922 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1923 "ratio") \ 1924 range(1, max_uintx) \ 1925 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \ 1926 \ 1927 product(uintx, CMSPrecleanNumerator, 2, \ 1928 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1929 "ratio") \ 1930 range(0, max_uintx-1) \ 1931 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \ 1932 \ 1933 product(bool, CMSPrecleanRefLists1, true, \ 1934 "Preclean ref lists during (initial) preclean phase") \ 1935 \ 1936 product(bool, CMSPrecleanRefLists2, false, \ 1937 "Preclean ref lists during abortable preclean phase") \ 1938 \ 1939 product(bool, CMSPrecleanSurvivors1, false, \ 1940 "Preclean survivors during (initial) preclean phase") \ 1941 \ 1942 product(bool, CMSPrecleanSurvivors2, true, \ 1943 "Preclean survivors during abortable preclean phase") \ 1944 \ 1945 product(uintx, CMSPrecleanThreshold, 1000, \ 1946 "Do not iterate again if number of dirty cards is less than this")\ 1947 range(100, max_uintx) \ 1948 \ 1949 product(bool, CMSCleanOnEnter, true, \ 1950 "Clean-on-enter optimization for reducing number of dirty cards") \ 1951 \ 1952 product(uintx, CMSRemarkVerifyVariant, 1, \ 1953 "Choose variant (1,2) of verification following remark") \ 1954 range(1, 2) \ 1955 \ 1956 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1957 "If Eden size is below this, do not try to schedule remark") \ 1958 \ 1959 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1960 "The Eden occupancy percentage (0-100) at which " \ 1961 "to try and schedule remark pause") \ 1962 range(0, 100) \ 1963 \ 1964 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1965 "Start sampling eden top at least before young gen " \ 1966 "occupancy reaches 1/<ratio> of the size at which " \ 1967 "we plan to schedule remark") \ 1968 range(1, max_uintx) \ 1969 \ 1970 product(uintx, CMSSamplingGrain, 16*K, \ 1971 "The minimum distance between eden samples for CMS (see above)") \ 1972 range(1, max_uintx) \ 1973 \ 1974 product(bool, CMSScavengeBeforeRemark, false, \ 1975 "Attempt scavenge before the CMS remark step") \ 1976 \ 1977 develop(bool, CMSTraceSweeper, false, \ 1978 "Trace some actions of the CMS sweeper") \ 1979 \ 1980 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1981 "Don't drain below this size per parallel worker/thief") \ 1982 range(1, max_juint) \ 1983 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \ 1984 \ 1985 manageable(intx, CMSWaitDuration, 2000, \ 1986 "Time in milliseconds that CMS thread waits for young GC") \ 1987 \ 1988 develop(uintx, CMSCheckInterval, 1000, \ 1989 "Interval in milliseconds that CMS thread checks if it " \ 1990 "should start a collection cycle") \ 1991 \ 1992 product(bool, CMSYield, true, \ 1993 "Yield between steps of CMS") \ 1994 \ 1995 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1996 "Bitmap operations should process at most this many bits " \ 1997 "between yields") \ 1998 range(1, max_uintx) \ 1999 \ 2000 product(bool, CMSDumpAtPromotionFailure, false, \ 2001 "Dump useful information about the state of the CMS old " \ 2002 "generation upon a promotion failure") \ 2003 \ 2004 product(bool, CMSPrintChunksInDump, false, \ 2005 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 2006 "more detailed information about the free chunks") \ 2007 \ 2008 product(bool, CMSPrintObjectsInDump, false, \ 2009 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 2010 "more detailed information about the allocated objects") \ 2011 \ 2012 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 2013 "Verify that all references across the FLS boundary " \ 2014 "are to valid objects") \ 2015 \ 2016 diagnostic(bool, FLSVerifyLists, false, \ 2017 "Do lots of (expensive) FreeListSpace verification") \ 2018 \ 2019 diagnostic(bool, FLSVerifyIndexTable, false, \ 2020 "Do lots of (expensive) FLS index table verification") \ 2021 \ 2022 develop(bool, FLSVerifyDictionary, false, \ 2023 "Do lots of (expensive) FLS dictionary verification") \ 2024 \ 2025 develop(bool, VerifyBlockOffsetArray, false, \ 2026 "Do (expensive) block offset array verification") \ 2027 \ 2028 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 2029 "Maintain _unallocated_block in BlockOffsetArray " \ 2030 "(currently applicable only to CMS collector)") \ 2031 \ 2032 develop(bool, TraceCMSState, false, \ 2033 "Trace the state of the CMS collection") \ 2034 \ 2035 product(intx, RefDiscoveryPolicy, 0, \ 2036 "Select type of reference discovery policy: " \ 2037 "reference-based(0) or referent-based(1)") \ 2038 range(ReferenceProcessor::DiscoveryPolicyMin, \ 2039 ReferenceProcessor::DiscoveryPolicyMax) \ 2040 \ 2041 product(bool, ParallelRefProcEnabled, false, \ 2042 "Enable parallel reference processing whenever possible") \ 2043 \ 2044 product(bool, ParallelRefProcBalancingEnabled, true, \ 2045 "Enable balancing of reference processing queues") \ 2046 \ 2047 product(uintx, CMSTriggerRatio, 80, \ 2048 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 2049 "allocated before a CMS collection cycle commences") \ 2050 range(0, 100) \ 2051 \ 2052 product(uintx, CMSBootstrapOccupancy, 50, \ 2053 "Percentage CMS generation occupancy at which to " \ 2054 "initiate CMS collection for bootstrapping collection stats") \ 2055 range(0, 100) \ 2056 \ 2057 product(intx, CMSInitiatingOccupancyFraction, -1, \ 2058 "Percentage CMS generation occupancy to start a CMS collection " \ 2059 "cycle. A negative value means that CMSTriggerRatio is used") \ 2060 range(min_intx, 100) \ 2061 \ 2062 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 2063 "Percentage of the (entire) heap occupancy to start a " \ 2064 "concurrent GC cycle. It is used by GCs that trigger a " \ 2065 "concurrent GC cycle based on the occupancy of the entire heap, " \ 2066 "not just one of the generations (e.g., G1). A value of 0 " \ 2067 "denotes 'do constant GC cycles'.") \ 2068 range(0, 100) \ 2069 \ 2070 manageable(intx, CMSTriggerInterval, -1, \ 2071 "Commence a CMS collection cycle (at least) every so many " \ 2072 "milliseconds (0 permanently, -1 disabled)") \ 2073 range(-1, max_intx) \ 2074 \ 2075 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2076 "Only use occupancy as a criterion for starting a CMS collection")\ 2077 \ 2078 product(uintx, CMSIsTooFullPercentage, 98, \ 2079 "An absolute ceiling above which CMS will always consider the " \ 2080 "unloading of classes when class unloading is enabled") \ 2081 range(0, 100) \ 2082 \ 2083 develop(bool, CMSTestInFreeList, false, \ 2084 "Check if the coalesced range is already in the " \ 2085 "free lists as claimed") \ 2086 \ 2087 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2088 "Check that all the garbage collected was returned to the " \ 2089 "free lists") \ 2090 \ 2091 notproduct(bool, ScavengeALot, false, \ 2092 "Force scavenge at every Nth exit from the runtime system " \ 2093 "(N=ScavengeALotInterval)") \ 2094 \ 2095 develop(bool, FullGCALot, false, \ 2096 "Force full gc at every Nth exit from the runtime system " \ 2097 "(N=FullGCALotInterval)") \ 2098 \ 2099 notproduct(bool, GCALotAtAllSafepoints, false, \ 2100 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2101 \ 2102 product(bool, PrintPromotionFailure, false, \ 2103 "Print additional diagnostic information following " \ 2104 "promotion failure") \ 2105 \ 2106 notproduct(bool, PromotionFailureALot, false, \ 2107 "Use promotion failure handling on every youngest generation " \ 2108 "collection") \ 2109 \ 2110 develop(uintx, PromotionFailureALotCount, 1000, \ 2111 "Number of promotion failures occurring at PLAB " \ 2112 "refill attempts (ParNew) or promotion attempts " \ 2113 "(other young collectors)") \ 2114 \ 2115 develop(uintx, PromotionFailureALotInterval, 5, \ 2116 "Total collections between promotion failures a lot") \ 2117 \ 2118 experimental(uintx, WorkStealingSleepMillis, 1, \ 2119 "Sleep time when sleep is used for yields") \ 2120 \ 2121 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2122 "Number of yields before a sleep is done during work stealing") \ 2123 \ 2124 experimental(uintx, WorkStealingHardSpins, 4096, \ 2125 "Number of iterations in a spin loop between checks on " \ 2126 "time out of hard spin") \ 2127 \ 2128 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2129 "Ratio of hard spins to calls to yield") \ 2130 \ 2131 develop(uintx, ObjArrayMarkingStride, 512, \ 2132 "Number of object array elements to push onto the marking stack " \ 2133 "before pushing a continuation entry") \ 2134 \ 2135 develop(bool, MetadataAllocationFailALot, false, \ 2136 "Fail metadata allocations at intervals controlled by " \ 2137 "MetadataAllocationFailALotInterval") \ 2138 \ 2139 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2140 "Metadata allocation failure a lot interval") \ 2141 \ 2142 develop(bool, TraceMetadataChunkAllocation, false, \ 2143 "Trace chunk metadata allocations") \ 2144 \ 2145 product(bool, TraceMetadataHumongousAllocation, false, \ 2146 "Trace humongous metadata allocations") \ 2147 \ 2148 develop(bool, TraceMetavirtualspaceAllocation, false, \ 2149 "Trace virtual space metadata allocations") \ 2150 \ 2151 notproduct(bool, ExecuteInternalVMTests, false, \ 2152 "Enable execution of internal VM tests") \ 2153 \ 2154 notproduct(bool, VerboseInternalVMTests, false, \ 2155 "Turn on logging for internal VM tests.") \ 2156 \ 2157 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2158 \ 2159 product_pd(bool, ResizeTLAB, \ 2160 "Dynamically resize TLAB size for threads") \ 2161 \ 2162 product(bool, ZeroTLAB, false, \ 2163 "Zero out the newly created TLAB") \ 2164 \ 2165 product(bool, FastTLABRefill, true, \ 2166 "Use fast TLAB refill code") \ 2167 \ 2168 product(bool, PrintTLAB, false, \ 2169 "Print various TLAB related information") \ 2170 \ 2171 product(bool, TLABStats, true, \ 2172 "Provide more detailed and expensive TLAB statistics " \ 2173 "(with PrintTLAB)") \ 2174 \ 2175 product_pd(bool, NeverActAsServerClassMachine, \ 2176 "Never act like a server-class machine") \ 2177 \ 2178 product(bool, AlwaysActAsServerClassMachine, false, \ 2179 "Always act like a server-class machine") \ 2180 \ 2181 product_pd(uint64_t, MaxRAM, \ 2182 "Real memory size (in bytes) used to set maximum heap size") \ 2183 range(0, 0XFFFFFFFFFFFFFFFF) \ 2184 \ 2185 product(size_t, ErgoHeapSizeLimit, 0, \ 2186 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2187 "MaxRAM / MaxRAMFraction") \ 2188 \ 2189 product(uintx, MaxRAMFraction, 4, \ 2190 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2191 "size") \ 2192 range(1, max_uintx) \ 2193 \ 2194 product(uintx, MinRAMFraction, 2, \ 2195 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2196 "size on systems with small physical memory size") \ 2197 range(1, max_uintx) \ 2198 \ 2199 product(uintx, InitialRAMFraction, 64, \ 2200 "Fraction (1/n) of real memory used for initial heap size") \ 2201 range(1, max_uintx) \ 2202 \ 2203 develop(uintx, MaxVirtMemFraction, 2, \ 2204 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2205 "determining maximum heap size") \ 2206 \ 2207 product(bool, UseAutoGCSelectPolicy, false, \ 2208 "Use automatic collection selection policy") \ 2209 \ 2210 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2211 "Automatic GC selection pause threshold in milliseconds") \ 2212 \ 2213 product(bool, UseAdaptiveSizePolicy, true, \ 2214 "Use adaptive generation sizing policies") \ 2215 \ 2216 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2217 "Use adaptive survivor sizing policies") \ 2218 \ 2219 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2220 "Use adaptive young-old sizing policies at minor collections") \ 2221 \ 2222 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2223 "Use adaptive young-old sizing policies at major collections") \ 2224 \ 2225 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2226 "Include statistics from System.gc() for adaptive size policy") \ 2227 \ 2228 product(bool, UseAdaptiveGCBoundary, false, \ 2229 "Allow young-old boundary to move") \ 2230 \ 2231 develop(bool, TraceAdaptiveGCBoundary, false, \ 2232 "Trace young-old boundary moves") \ 2233 \ 2234 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2235 "Resize the virtual spaces of the young or old generations") \ 2236 range(-1, 1) \ 2237 \ 2238 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2239 "Policy for changing generation size for throughput goals") \ 2240 range(0, 1) \ 2241 \ 2242 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2243 "Number of steps where heuristics is used before data is used") \ 2244 \ 2245 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2246 "Number of collections before the adaptive sizing is started") \ 2247 \ 2248 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2249 "Collection interval for printing information; zero means never") \ 2250 \ 2251 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2252 "Use adaptive minimum footprint as a goal") \ 2253 \ 2254 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2255 "Weight given to exponential resizing, between 0 and 100") \ 2256 range(0, 100) \ 2257 \ 2258 product(uintx, AdaptiveTimeWeight, 25, \ 2259 "Weight given to time in adaptive policy, between 0 and 100") \ 2260 range(0, 100) \ 2261 \ 2262 product(uintx, PausePadding, 1, \ 2263 "How much buffer to keep for pause time") \ 2264 \ 2265 product(uintx, PromotedPadding, 3, \ 2266 "How much buffer to keep for promotion failure") \ 2267 \ 2268 product(uintx, SurvivorPadding, 3, \ 2269 "How much buffer to keep for survivor overflow") \ 2270 \ 2271 product(uintx, ThresholdTolerance, 10, \ 2272 "Allowed collection cost difference between generations") \ 2273 range(0, 100) \ 2274 \ 2275 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2276 "If collection costs are within margin, reduce both by full " \ 2277 "delta") \ 2278 \ 2279 product(uintx, YoungGenerationSizeIncrement, 20, \ 2280 "Adaptive size percentage change in young generation") \ 2281 range(0, 100) \ 2282 \ 2283 product(uintx, YoungGenerationSizeSupplement, 80, \ 2284 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2285 range(0, 100) \ 2286 \ 2287 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2288 "Decay factor to YoungedGenerationSizeSupplement") \ 2289 range(1, max_uintx) \ 2290 \ 2291 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2292 "Adaptive size percentage change in tenured generation") \ 2293 range(0, 100) \ 2294 \ 2295 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2296 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2297 range(0, 100) \ 2298 \ 2299 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2300 "Decay factor to TenuredGenerationSizeIncrement") \ 2301 range(1, max_uintx) \ 2302 \ 2303 product(uintx, MaxGCPauseMillis, max_uintx, \ 2304 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2305 "or (G1 Only) the maximum GC time per MMU time slice") \ 2306 range(1, max_uintx) \ 2307 constraint(MaxGCPauseMillisConstraintFunc,AfterMemoryInit) \ 2308 \ 2309 product(uintx, GCPauseIntervalMillis, 0, \ 2310 "Time slice for MMU specification") \ 2311 constraint(GCPauseIntervalMillisConstraintFunc,AfterMemoryInit) \ 2312 \ 2313 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2314 "Adaptive size policy maximum GC minor pause time goal " \ 2315 "in millisecond") \ 2316 \ 2317 product(uintx, GCTimeRatio, 99, \ 2318 "Adaptive size policy application time to GC time ratio") \ 2319 \ 2320 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2321 "Adaptive size scale down factor for shrinking") \ 2322 range(1, max_uintx) \ 2323 \ 2324 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2325 "Adaptive size decays the major cost for long major intervals") \ 2326 \ 2327 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2328 "Time scale over which major costs decay") \ 2329 \ 2330 product(uintx, MinSurvivorRatio, 3, \ 2331 "Minimum ratio of young generation/survivor space size") \ 2332 range(3, max_uintx) \ 2333 \ 2334 product(uintx, InitialSurvivorRatio, 8, \ 2335 "Initial ratio of young generation/survivor space size") \ 2336 \ 2337 product(size_t, BaseFootPrintEstimate, 256*M, \ 2338 "Estimate of footprint other than Java Heap") \ 2339 \ 2340 product(bool, UseGCOverheadLimit, true, \ 2341 "Use policy to limit of proportion of time spent in GC " \ 2342 "before an OutOfMemory error is thrown") \ 2343 \ 2344 product(uintx, GCTimeLimit, 98, \ 2345 "Limit of the proportion of time spent in GC before " \ 2346 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2347 range(0, 100) \ 2348 \ 2349 product(uintx, GCHeapFreeLimit, 2, \ 2350 "Minimum percentage of free space after a full GC before an " \ 2351 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2352 range(0, 100) \ 2353 \ 2354 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2355 "Number of consecutive collections before gc time limit fires") \ 2356 range(1, max_uintx) \ 2357 \ 2358 product(bool, PrintAdaptiveSizePolicy, false, \ 2359 "Print information about AdaptiveSizePolicy") \ 2360 \ 2361 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2362 "How far ahead to prefetch destination area (<= 0 means off)") \ 2363 \ 2364 product(intx, PrefetchScanIntervalInBytes, -1, \ 2365 "How far ahead to prefetch scan area (<= 0 means off)") \ 2366 \ 2367 product(intx, PrefetchFieldsAhead, -1, \ 2368 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2369 \ 2370 diagnostic(bool, VerifySilently, false, \ 2371 "Do not print the verification progress") \ 2372 \ 2373 diagnostic(bool, VerifyDuringStartup, false, \ 2374 "Verify memory system before executing any Java code " \ 2375 "during VM initialization") \ 2376 \ 2377 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2378 "Verify system before exiting") \ 2379 \ 2380 diagnostic(bool, VerifyBeforeGC, false, \ 2381 "Verify memory system before GC") \ 2382 \ 2383 diagnostic(bool, VerifyAfterGC, false, \ 2384 "Verify memory system after GC") \ 2385 \ 2386 diagnostic(bool, VerifyDuringGC, false, \ 2387 "Verify memory system during GC (between phases)") \ 2388 \ 2389 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2390 "Enable parallel memory system verification") \ 2391 \ 2392 diagnostic(bool, DeferInitialCardMark, false, \ 2393 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2394 "may arise from new_pre_store_barrier") \ 2395 \ 2396 product(bool, UseCondCardMark, false, \ 2397 "Check for already marked card before updating card table") \ 2398 \ 2399 diagnostic(bool, VerifyRememberedSets, false, \ 2400 "Verify GC remembered sets") \ 2401 \ 2402 diagnostic(bool, VerifyObjectStartArray, true, \ 2403 "Verify GC object start array if verify before/after") \ 2404 \ 2405 product(bool, DisableExplicitGC, false, \ 2406 "Ignore calls to System.gc()") \ 2407 \ 2408 notproduct(bool, CheckMemoryInitialization, false, \ 2409 "Check memory initialization") \ 2410 \ 2411 diagnostic(bool, BindCMSThreadToCPU, false, \ 2412 "Bind CMS Thread to CPU if possible") \ 2413 \ 2414 diagnostic(uintx, CPUForCMSThread, 0, \ 2415 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2416 \ 2417 product(bool, BindGCTaskThreadsToCPUs, false, \ 2418 "Bind GCTaskThreads to CPUs if possible") \ 2419 \ 2420 product(bool, UseGCTaskAffinity, false, \ 2421 "Use worker affinity when asking for GCTasks") \ 2422 \ 2423 product(uintx, ProcessDistributionStride, 4, \ 2424 "Stride through processors when distributing processes") \ 2425 \ 2426 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2427 "Number of times the coordinator GC thread will sleep while " \ 2428 "yielding before giving up and resuming GC") \ 2429 \ 2430 product(uintx, CMSYieldSleepCount, 0, \ 2431 "Number of times a GC thread (minus the coordinator) " \ 2432 "will sleep while yielding before giving up and resuming GC") \ 2433 \ 2434 /* gc tracing */ \ 2435 manageable(bool, PrintGC, false, \ 2436 "Print message at garbage collection") \ 2437 \ 2438 manageable(bool, PrintGCDetails, false, \ 2439 "Print more details at garbage collection") \ 2440 \ 2441 manageable(bool, PrintGCDateStamps, false, \ 2442 "Print date stamps at garbage collection") \ 2443 \ 2444 manageable(bool, PrintGCTimeStamps, false, \ 2445 "Print timestamps at garbage collection") \ 2446 \ 2447 manageable(bool, PrintGCID, true, \ 2448 "Print an identifier for each garbage collection") \ 2449 \ 2450 product(bool, PrintGCTaskTimeStamps, false, \ 2451 "Print timestamps for individual gc worker thread tasks") \ 2452 \ 2453 develop(intx, ConcGCYieldTimeout, 0, \ 2454 "If non-zero, assert that GC threads yield within this " \ 2455 "number of milliseconds") \ 2456 range(0, max_intx) \ 2457 \ 2458 product(bool, PrintReferenceGC, false, \ 2459 "Print times spent handling reference objects during GC " \ 2460 "(enabled only when PrintGCDetails)") \ 2461 \ 2462 develop(bool, TraceReferenceGC, false, \ 2463 "Trace handling of soft/weak/final/phantom references") \ 2464 \ 2465 develop(bool, TraceFinalizerRegistration, false, \ 2466 "Trace registration of final references") \ 2467 \ 2468 notproduct(bool, TraceScavenge, false, \ 2469 "Trace scavenge") \ 2470 \ 2471 product(bool, IgnoreEmptyClassPaths, false, \ 2472 "Ignore empty path elements in -classpath") \ 2473 \ 2474 product(bool, TraceClassPaths, false, \ 2475 "Trace processing of class paths") \ 2476 \ 2477 product_rw(bool, TraceClassLoading, false, \ 2478 "Trace all classes loaded") \ 2479 \ 2480 product(bool, TraceClassLoadingPreorder, false, \ 2481 "Trace all classes loaded in order referenced (not loaded)") \ 2482 \ 2483 product_rw(bool, TraceClassUnloading, false, \ 2484 "Trace unloading of classes") \ 2485 \ 2486 product_rw(bool, TraceLoaderConstraints, false, \ 2487 "Trace loader constraints") \ 2488 \ 2489 develop(bool, TraceClassLoaderData, false, \ 2490 "Trace class loader loader_data lifetime") \ 2491 \ 2492 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2493 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2494 "Initial size of the boot class loader data metaspace") \ 2495 range(30*K, max_uintx/BytesPerWord) \ 2496 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 2497 \ 2498 product(bool, TraceYoungGenTime, false, \ 2499 "Trace accumulated time for young collection") \ 2500 \ 2501 product(bool, TraceOldGenTime, false, \ 2502 "Trace accumulated time for old collection") \ 2503 \ 2504 product(bool, PrintTenuringDistribution, false, \ 2505 "Print tenuring age information") \ 2506 \ 2507 product_rw(bool, PrintHeapAtGC, false, \ 2508 "Print heap layout before and after each GC") \ 2509 \ 2510 product_rw(bool, PrintHeapAtGCExtended, false, \ 2511 "Print extended information about the layout of the heap " \ 2512 "when -XX:+PrintHeapAtGC is set") \ 2513 \ 2514 product(bool, PrintHeapAtSIGBREAK, true, \ 2515 "Print heap layout in response to SIGBREAK") \ 2516 \ 2517 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2518 "Print a class histogram before any major stop-world GC") \ 2519 \ 2520 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2521 "Print a class histogram after any major stop-world GC") \ 2522 \ 2523 manageable(bool, PrintClassHistogram, false, \ 2524 "Print a histogram of class instances") \ 2525 \ 2526 develop(bool, TraceWorkGang, false, \ 2527 "Trace activities of work gangs") \ 2528 \ 2529 product(bool, TraceParallelOldGCTasks, false, \ 2530 "Trace multithreaded GC activity") \ 2531 \ 2532 develop(bool, TraceBlockOffsetTable, false, \ 2533 "Print BlockOffsetTable maps") \ 2534 \ 2535 develop(bool, TraceCardTableModRefBS, false, \ 2536 "Print CardTableModRefBS maps") \ 2537 \ 2538 develop(bool, TraceGCTaskManager, false, \ 2539 "Trace actions of the GC task manager") \ 2540 \ 2541 develop(bool, TraceGCTaskQueue, false, \ 2542 "Trace actions of the GC task queues") \ 2543 \ 2544 diagnostic(bool, TraceGCTaskThread, false, \ 2545 "Trace actions of the GC task threads") \ 2546 \ 2547 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2548 "Print the time taken by each phase in ParallelOldGC " \ 2549 "(PrintGCDetails must also be enabled)") \ 2550 \ 2551 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2552 "Trace marking phase in ParallelOldGC") \ 2553 \ 2554 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2555 "Trace summary phase in ParallelOldGC") \ 2556 \ 2557 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2558 "Trace compaction phase in ParallelOldGC") \ 2559 \ 2560 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2561 "Trace dense prefix computation for ParallelOldGC") \ 2562 \ 2563 develop(bool, IgnoreLibthreadGPFault, false, \ 2564 "Suppress workaround for libthread GP fault") \ 2565 \ 2566 product(bool, PrintJNIGCStalls, false, \ 2567 "Print diagnostic message when GC is stalled " \ 2568 "by JNI critical section") \ 2569 \ 2570 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2571 "The percentage of the used heap that the instances of a class " \ 2572 "must occupy for the class to generate a trace event") \ 2573 range(0.0, 100.0) \ 2574 \ 2575 /* GC log rotation setting */ \ 2576 \ 2577 product(bool, UseGCLogFileRotation, false, \ 2578 "Rotate gclog files (for long running applications). It requires "\ 2579 "-Xloggc:<filename>") \ 2580 \ 2581 product(uintx, NumberOfGCLogFiles, 0, \ 2582 "Number of gclog files in rotation " \ 2583 "(default: 0, no rotation)") \ 2584 \ 2585 product(size_t, GCLogFileSize, 8*K, \ 2586 "GC log file size, requires UseGCLogFileRotation. " \ 2587 "Set to 0 to only trigger rotation via jcmd") \ 2588 \ 2589 /* JVMTI heap profiling */ \ 2590 \ 2591 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2592 "Trace JVMTI object tagging calls") \ 2593 \ 2594 diagnostic(bool, VerifyBeforeIteration, false, \ 2595 "Verify memory system before JVMTI iteration") \ 2596 \ 2597 /* compiler interface */ \ 2598 \ 2599 develop(bool, CIPrintCompilerName, false, \ 2600 "when CIPrint is active, print the name of the active compiler") \ 2601 \ 2602 diagnostic(bool, CIPrintCompileQueue, false, \ 2603 "display the contents of the compile queue whenever a " \ 2604 "compilation is enqueued") \ 2605 \ 2606 develop(bool, CIPrintRequests, false, \ 2607 "display every request for compilation") \ 2608 \ 2609 product(bool, CITime, false, \ 2610 "collect timing information for compilation") \ 2611 \ 2612 develop(bool, CITimeVerbose, false, \ 2613 "be more verbose in compilation timings") \ 2614 \ 2615 develop(bool, CITimeEach, false, \ 2616 "display timing information after each successful compilation") \ 2617 \ 2618 develop(bool, CICountOSR, false, \ 2619 "use a separate counter when assigning ids to osr compilations") \ 2620 \ 2621 develop(bool, CICompileNatives, true, \ 2622 "compile native methods if supported by the compiler") \ 2623 \ 2624 develop_pd(bool, CICompileOSR, \ 2625 "compile on stack replacement methods if supported by the " \ 2626 "compiler") \ 2627 \ 2628 develop(bool, CIPrintMethodCodes, false, \ 2629 "print method bytecodes of the compiled code") \ 2630 \ 2631 develop(bool, CIPrintTypeFlow, false, \ 2632 "print the results of ciTypeFlow analysis") \ 2633 \ 2634 develop(bool, CITraceTypeFlow, false, \ 2635 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2636 \ 2637 develop(intx, OSROnlyBCI, -1, \ 2638 "OSR only at this bci. Negative values mean exclude that bci") \ 2639 \ 2640 /* compiler */ \ 2641 \ 2642 /* notice: the max range value here is max_jint, not max_intx */ \ 2643 /* because of overflow issue */ \ 2644 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2645 "Number of compiler threads to run") \ 2646 range(0, max_jint) \ 2647 constraint(CICompilerCountConstraintFunc, AtParse) \ 2648 \ 2649 product(intx, CompilationPolicyChoice, 0, \ 2650 "which compilation policy (0-3)") \ 2651 range(0, 3) \ 2652 \ 2653 develop(bool, UseStackBanging, true, \ 2654 "use stack banging for stack overflow checks (required for " \ 2655 "proper StackOverflow handling; disable only to measure cost " \ 2656 "of stackbanging)") \ 2657 \ 2658 develop(bool, UseStrictFP, true, \ 2659 "use strict fp if modifier strictfp is set") \ 2660 \ 2661 develop(bool, GenerateSynchronizationCode, true, \ 2662 "generate locking/unlocking code for synchronized methods and " \ 2663 "monitors") \ 2664 \ 2665 develop(bool, GenerateCompilerNullChecks, true, \ 2666 "Generate explicit null checks for loads/stores/calls") \ 2667 \ 2668 develop(bool, GenerateRangeChecks, true, \ 2669 "Generate range checks for array accesses") \ 2670 \ 2671 develop_pd(bool, ImplicitNullChecks, \ 2672 "Generate code for implicit null checks") \ 2673 \ 2674 product_pd(bool, TrapBasedNullChecks, \ 2675 "Generate code for null checks that uses a cmp and trap " \ 2676 "instruction raising SIGTRAP. This is only used if an access to" \ 2677 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2678 "ImplicitNullChecks don't work (PPC64).") \ 2679 \ 2680 product(bool, PrintSafepointStatistics, false, \ 2681 "Print statistics about safepoint synchronization") \ 2682 \ 2683 product(intx, PrintSafepointStatisticsCount, 300, \ 2684 "Total number of safepoint statistics collected " \ 2685 "before printing them out") \ 2686 range(1, max_intx) \ 2687 \ 2688 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2689 "Print safepoint statistics only when safepoint takes " \ 2690 "more than PrintSafepointSatisticsTimeout in millis") \ 2691 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 2692 NOT_LP64(range(-1, max_intx)) \ 2693 \ 2694 product(bool, TraceSafepointCleanupTime, false, \ 2695 "Print the break down of clean up tasks performed during " \ 2696 "safepoint") \ 2697 \ 2698 product(bool, Inline, true, \ 2699 "Enable inlining") \ 2700 \ 2701 product(bool, ClipInlining, true, \ 2702 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2703 \ 2704 develop(bool, UseCHA, true, \ 2705 "Enable CHA") \ 2706 \ 2707 product(bool, UseTypeProfile, true, \ 2708 "Check interpreter profile for historically monomorphic calls") \ 2709 \ 2710 diagnostic(bool, PrintInlining, false, \ 2711 "Print inlining optimizations") \ 2712 \ 2713 product(bool, UsePopCountInstruction, false, \ 2714 "Use population count instruction") \ 2715 \ 2716 develop(bool, EagerInitialization, false, \ 2717 "Eagerly initialize classes if possible") \ 2718 \ 2719 diagnostic(bool, LogTouchedMethods, false, \ 2720 "Log methods which have been ever touched in runtime") \ 2721 \ 2722 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 2723 "Print all methods that have been ever touched in runtime") \ 2724 \ 2725 develop(bool, TraceMethodReplacement, false, \ 2726 "Print when methods are replaced do to recompilation") \ 2727 \ 2728 develop(bool, PrintMethodFlushing, false, \ 2729 "Print the nmethods being flushed") \ 2730 \ 2731 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2732 "print statistics about method flushing") \ 2733 \ 2734 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2735 "Number of compiled code invocations after which " \ 2736 "the method is considered as hot by the flusher") \ 2737 range(1, max_jint) \ 2738 \ 2739 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2740 "Minimum number of sweeper passes before an nmethod " \ 2741 "can be flushed") \ 2742 range(0, max_intx) \ 2743 \ 2744 product(bool, UseCodeAging, true, \ 2745 "Insert counter to detect warm methods") \ 2746 \ 2747 diagnostic(bool, StressCodeAging, false, \ 2748 "Start with counters compiled in") \ 2749 \ 2750 develop(bool, UseRelocIndex, false, \ 2751 "Use an index to speed random access to relocations") \ 2752 \ 2753 develop(bool, StressCodeBuffers, false, \ 2754 "Exercise code buffer expansion and other rare state changes") \ 2755 \ 2756 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2757 "Generate extra debugging information for non-safepoints in " \ 2758 "nmethods") \ 2759 \ 2760 product(bool, PrintVMOptions, false, \ 2761 "Print flags that appeared on the command line") \ 2762 \ 2763 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2764 "Ignore unrecognized VM options") \ 2765 \ 2766 product(bool, PrintCommandLineFlags, false, \ 2767 "Print flags specified on command line or set by ergonomics") \ 2768 \ 2769 product(bool, PrintFlagsInitial, false, \ 2770 "Print all VM flags before argument processing and exit VM") \ 2771 \ 2772 product(bool, PrintFlagsFinal, false, \ 2773 "Print all VM flags after argument and ergonomic processing") \ 2774 \ 2775 notproduct(bool, PrintFlagsWithComments, false, \ 2776 "Print all VM flags with default values and descriptions and " \ 2777 "exit") \ 2778 \ 2779 product(bool, PrintFlagsRanges, false, \ 2780 "Print VM flags and their ranges and exit VM") \ 2781 \ 2782 diagnostic(bool, SerializeVMOutput, true, \ 2783 "Use a mutex to serialize output to tty and LogFile") \ 2784 \ 2785 diagnostic(bool, DisplayVMOutput, true, \ 2786 "Display all VM output on the tty, independently of LogVMOutput") \ 2787 \ 2788 diagnostic(bool, LogVMOutput, false, \ 2789 "Save VM output to LogFile") \ 2790 \ 2791 diagnostic(ccstr, LogFile, NULL, \ 2792 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2793 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2794 \ 2795 product(ccstr, ErrorFile, NULL, \ 2796 "If an error occurs, save the error data to this file " \ 2797 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2798 \ 2799 product(bool, DisplayVMOutputToStderr, false, \ 2800 "If DisplayVMOutput is true, display all VM output to stderr") \ 2801 \ 2802 product(bool, DisplayVMOutputToStdout, false, \ 2803 "If DisplayVMOutput is true, display all VM output to stdout") \ 2804 \ 2805 product(bool, UseHeavyMonitors, false, \ 2806 "use heavyweight instead of lightweight Java monitors") \ 2807 \ 2808 product(bool, PrintStringTableStatistics, false, \ 2809 "print statistics about the StringTable and SymbolTable") \ 2810 \ 2811 diagnostic(bool, VerifyStringTableAtExit, false, \ 2812 "verify StringTable contents at exit") \ 2813 \ 2814 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2815 "print histogram of the symbol table") \ 2816 \ 2817 notproduct(bool, ExitVMOnVerifyError, false, \ 2818 "standard exit from VM if bytecode verify error " \ 2819 "(only in debug mode)") \ 2820 \ 2821 diagnostic(ccstr, AbortVMOnException, NULL, \ 2822 "Call fatal if this exception is thrown. Example: " \ 2823 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2824 \ 2825 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 2826 "Call fatal if the exception pointed by AbortVMOnException " \ 2827 "has this message") \ 2828 \ 2829 develop(bool, DebugVtables, false, \ 2830 "add debugging code to vtable dispatch") \ 2831 \ 2832 develop(bool, PrintVtables, false, \ 2833 "print vtables when printing klass") \ 2834 \ 2835 notproduct(bool, PrintVtableStats, false, \ 2836 "print vtables stats at end of run") \ 2837 \ 2838 develop(bool, TraceCreateZombies, false, \ 2839 "trace creation of zombie nmethods") \ 2840 \ 2841 notproduct(bool, IgnoreLockingAssertions, false, \ 2842 "disable locking assertions (for speed)") \ 2843 \ 2844 product(bool, RangeCheckElimination, true, \ 2845 "Eliminate range checks") \ 2846 \ 2847 develop_pd(bool, UncommonNullCast, \ 2848 "track occurrences of null in casts; adjust compiler tactics") \ 2849 \ 2850 develop(bool, TypeProfileCasts, true, \ 2851 "treat casts like calls for purposes of type profiling") \ 2852 \ 2853 develop(bool, DelayCompilationDuringStartup, true, \ 2854 "Delay invoking the compiler until main application class is " \ 2855 "loaded") \ 2856 \ 2857 develop(bool, CompileTheWorld, false, \ 2858 "Compile all methods in all classes in bootstrap class path " \ 2859 "(stress test)") \ 2860 \ 2861 develop(bool, CompileTheWorldPreloadClasses, true, \ 2862 "Preload all classes used by a class before start loading") \ 2863 \ 2864 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2865 "Force a safepoint every n compiles so sweeper can keep up") \ 2866 \ 2867 develop(bool, FillDelaySlots, true, \ 2868 "Fill delay slots (on SPARC only)") \ 2869 \ 2870 develop(bool, TimeLivenessAnalysis, false, \ 2871 "Time computation of bytecode liveness analysis") \ 2872 \ 2873 develop(bool, TraceLivenessGen, false, \ 2874 "Trace the generation of liveness analysis information") \ 2875 \ 2876 notproduct(bool, TraceLivenessQuery, false, \ 2877 "Trace queries of liveness analysis information") \ 2878 \ 2879 notproduct(bool, CollectIndexSetStatistics, false, \ 2880 "Collect information about IndexSets") \ 2881 \ 2882 develop(bool, UseLoopSafepoints, true, \ 2883 "Generate Safepoint nodes in every loop") \ 2884 \ 2885 develop(intx, FastAllocateSizeLimit, 128*K, \ 2886 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2887 "Inline allocations larger than this in doublewords must go slow")\ 2888 \ 2889 product(bool, AggressiveOpts, false, \ 2890 "Enable aggressive optimizations - see arguments.cpp") \ 2891 \ 2892 product_pd(bool, CompactStrings, \ 2893 "Enable Strings to use single byte chars in backing store") \ 2894 \ 2895 product_pd(uintx, TypeProfileLevel, \ 2896 "=XYZ, with Z: Type profiling of arguments at call; " \ 2897 "Y: Type profiling of return value at call; " \ 2898 "X: Type profiling of parameters to methods; " \ 2899 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2900 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 2901 \ 2902 product(intx, TypeProfileArgsLimit, 2, \ 2903 "max number of call arguments to consider for type profiling") \ 2904 range(0, 16) \ 2905 \ 2906 product(intx, TypeProfileParmsLimit, 2, \ 2907 "max number of incoming parameters to consider for type profiling"\ 2908 ", -1 for all") \ 2909 range(-1, 64) \ 2910 \ 2911 /* statistics */ \ 2912 develop(bool, CountCompiledCalls, false, \ 2913 "Count method invocations") \ 2914 \ 2915 notproduct(bool, CountRuntimeCalls, false, \ 2916 "Count VM runtime calls") \ 2917 \ 2918 develop(bool, CountJNICalls, false, \ 2919 "Count jni method invocations") \ 2920 \ 2921 notproduct(bool, CountJVMCalls, false, \ 2922 "Count jvm method invocations") \ 2923 \ 2924 notproduct(bool, CountRemovableExceptions, false, \ 2925 "Count exceptions that could be replaced by branches due to " \ 2926 "inlining") \ 2927 \ 2928 notproduct(bool, ICMissHistogram, false, \ 2929 "Produce histogram of IC misses") \ 2930 \ 2931 /* interpreter */ \ 2932 develop(bool, ClearInterpreterLocals, false, \ 2933 "Always clear local variables of interpreter activations upon " \ 2934 "entry") \ 2935 \ 2936 product_pd(bool, RewriteBytecodes, \ 2937 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2938 \ 2939 product_pd(bool, RewriteFrequentPairs, \ 2940 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2941 \ 2942 diagnostic(bool, PrintInterpreter, false, \ 2943 "Print the generated interpreter code") \ 2944 \ 2945 product(bool, UseInterpreter, true, \ 2946 "Use interpreter for non-compiled methods") \ 2947 \ 2948 develop(bool, UseFastSignatureHandlers, true, \ 2949 "Use fast signature handlers for native calls") \ 2950 \ 2951 product(bool, UseLoopCounter, true, \ 2952 "Increment invocation counter on backward branch") \ 2953 \ 2954 product_pd(bool, UseOnStackReplacement, \ 2955 "Use on stack replacement, calls runtime if invoc. counter " \ 2956 "overflows in loop") \ 2957 \ 2958 notproduct(bool, TraceOnStackReplacement, false, \ 2959 "Trace on stack replacement") \ 2960 \ 2961 product_pd(bool, PreferInterpreterNativeStubs, \ 2962 "Use always interpreter stubs for native methods invoked via " \ 2963 "interpreter") \ 2964 \ 2965 develop(bool, CountBytecodes, false, \ 2966 "Count number of bytecodes executed") \ 2967 \ 2968 develop(bool, PrintBytecodeHistogram, false, \ 2969 "Print histogram of the executed bytecodes") \ 2970 \ 2971 develop(bool, PrintBytecodePairHistogram, false, \ 2972 "Print histogram of the executed bytecode pairs") \ 2973 \ 2974 diagnostic(bool, PrintSignatureHandlers, false, \ 2975 "Print code generated for native method signature handlers") \ 2976 \ 2977 develop(bool, VerifyOops, false, \ 2978 "Do plausibility checks for oops") \ 2979 \ 2980 develop(bool, CheckUnhandledOops, false, \ 2981 "Check for unhandled oops in VM code") \ 2982 \ 2983 develop(bool, VerifyJNIFields, trueInDebug, \ 2984 "Verify jfieldIDs for instance fields") \ 2985 \ 2986 notproduct(bool, VerifyJNIEnvThread, false, \ 2987 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2988 "from JNI") \ 2989 \ 2990 develop(bool, VerifyFPU, false, \ 2991 "Verify FPU state (check for NaN's, etc.)") \ 2992 \ 2993 develop(bool, VerifyThread, false, \ 2994 "Watch the thread register for corruption (SPARC only)") \ 2995 \ 2996 develop(bool, VerifyActivationFrameSize, false, \ 2997 "Verify that activation frame didn't become smaller than its " \ 2998 "minimal size") \ 2999 \ 3000 develop(bool, TraceFrequencyInlining, false, \ 3001 "Trace frequency based inlining") \ 3002 \ 3003 develop_pd(bool, InlineIntrinsics, \ 3004 "Inline intrinsics that can be statically resolved") \ 3005 \ 3006 product_pd(bool, ProfileInterpreter, \ 3007 "Profile at the bytecode level during interpretation") \ 3008 \ 3009 develop(bool, TraceProfileInterpreter, false, \ 3010 "Trace profiling at the bytecode level during interpretation. " \ 3011 "This outputs the profiling information collected to improve " \ 3012 "jit compilation.") \ 3013 \ 3014 develop_pd(bool, ProfileTraps, \ 3015 "Profile deoptimization traps at the bytecode level") \ 3016 \ 3017 product(intx, ProfileMaturityPercentage, 20, \ 3018 "number of method invocations/branches (expressed as % of " \ 3019 "CompileThreshold) before using the method's profile") \ 3020 range(0, 100) \ 3021 \ 3022 diagnostic(bool, PrintMethodData, false, \ 3023 "Print the results of +ProfileInterpreter at end of run") \ 3024 \ 3025 develop(bool, VerifyDataPointer, trueInDebug, \ 3026 "Verify the method data pointer during interpreter profiling") \ 3027 \ 3028 develop(bool, VerifyCompiledCode, false, \ 3029 "Include miscellaneous runtime verifications in nmethod code; " \ 3030 "default off because it disturbs nmethod size heuristics") \ 3031 \ 3032 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 3033 "Manually make GC thread crash then dump java stack trace; " \ 3034 "Test only") \ 3035 \ 3036 /* compilation */ \ 3037 product(bool, UseCompiler, true, \ 3038 "Use Just-In-Time compilation") \ 3039 \ 3040 develop(bool, TraceCompilationPolicy, false, \ 3041 "Trace compilation policy") \ 3042 \ 3043 develop(bool, TimeCompilationPolicy, false, \ 3044 "Time the compilation policy") \ 3045 \ 3046 product(bool, UseCounterDecay, true, \ 3047 "Adjust recompilation counters") \ 3048 \ 3049 develop(intx, CounterHalfLifeTime, 30, \ 3050 "Half-life time of invocation counters (in seconds)") \ 3051 \ 3052 develop(intx, CounterDecayMinIntervalLength, 500, \ 3053 "The minimum interval (in milliseconds) between invocation of " \ 3054 "CounterDecay") \ 3055 \ 3056 product(bool, AlwaysCompileLoopMethods, false, \ 3057 "When using recompilation, never interpret methods " \ 3058 "containing loops") \ 3059 \ 3060 product(bool, DontCompileHugeMethods, true, \ 3061 "Do not compile methods > HugeMethodLimit") \ 3062 \ 3063 /* Bytecode escape analysis estimation. */ \ 3064 product(bool, EstimateArgEscape, true, \ 3065 "Analyze bytecodes to estimate escape state of arguments") \ 3066 \ 3067 product(intx, BCEATraceLevel, 0, \ 3068 "How much tracing to do of bytecode escape analysis estimates " \ 3069 "(0-3)") \ 3070 range(0, 3) \ 3071 \ 3072 product(intx, MaxBCEAEstimateLevel, 5, \ 3073 "Maximum number of nested calls that are analyzed by BC EA") \ 3074 range(0, max_jint) \ 3075 \ 3076 product(intx, MaxBCEAEstimateSize, 150, \ 3077 "Maximum bytecode size of a method to be analyzed by BC EA") \ 3078 range(0, max_jint) \ 3079 \ 3080 product(intx, AllocatePrefetchStyle, 1, \ 3081 "0 = no prefetch, " \ 3082 "1 = prefetch instructions for each allocation, " \ 3083 "2 = use TLAB watermark to gate allocation prefetch, " \ 3084 "3 = use BIS instruction on Sparc for allocation prefetch") \ 3085 range(0, 3) \ 3086 \ 3087 product(intx, AllocatePrefetchDistance, -1, \ 3088 "Distance to prefetch ahead of allocation pointer. " \ 3089 "-1: use system-specific value (automatically determined") \ 3090 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 3091 \ 3092 product(intx, AllocatePrefetchLines, 3, \ 3093 "Number of lines to prefetch ahead of array allocation pointer") \ 3094 range(1, max_jint / 2) \ 3095 \ 3096 product(intx, AllocateInstancePrefetchLines, 1, \ 3097 "Number of lines to prefetch ahead of instance allocation " \ 3098 "pointer") \ 3099 range(1, max_jint / 2) \ 3100 \ 3101 product(intx, AllocatePrefetchStepSize, 16, \ 3102 "Step size in bytes of sequential prefetch instructions") \ 3103 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 3104 \ 3105 product(intx, AllocatePrefetchInstr, 0, \ 3106 "Prefetch instruction to prefetch ahead of allocation pointer") \ 3107 constraint(AllocatePrefetchInstrConstraintFunc, AfterErgo) \ 3108 \ 3109 /* deoptimization */ \ 3110 develop(bool, TraceDeoptimization, false, \ 3111 "Trace deoptimization") \ 3112 \ 3113 develop(bool, PrintDeoptimizationDetails, false, \ 3114 "Print more information about deoptimization") \ 3115 \ 3116 develop(bool, DebugDeoptimization, false, \ 3117 "Tracing various information while debugging deoptimization") \ 3118 \ 3119 product(intx, SelfDestructTimer, 0, \ 3120 "Will cause VM to terminate after a given time (in minutes) " \ 3121 "(0 means off)") \ 3122 range(0, max_intx) \ 3123 \ 3124 product(intx, MaxJavaStackTraceDepth, 1024, \ 3125 "The maximum number of lines in the stack trace for Java " \ 3126 "exceptions (0 means all)") \ 3127 range(0, max_jint/2) \ 3128 \ 3129 /* notice: the max range value here is max_jint, not max_intx */ \ 3130 /* because of overflow issue */ \ 3131 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 3132 "Guarantee a safepoint (at least) every so many milliseconds " \ 3133 "(0 means none)")) \ 3134 NOT_EMBEDDED(range(0, max_jint)) \ 3135 \ 3136 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 3137 "Guarantee a safepoint (at least) every so many milliseconds " \ 3138 "(0 means none)")) \ 3139 EMBEDDED_ONLY(range(0, max_jint)) \ 3140 \ 3141 product(intx, SafepointTimeoutDelay, 10000, \ 3142 "Delay in milliseconds for option SafepointTimeout") \ 3143 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 3144 NOT_LP64(range(0, max_intx)) \ 3145 \ 3146 product(intx, NmethodSweepActivity, 10, \ 3147 "Removes cold nmethods from code cache if > 0. Higher values " \ 3148 "result in more aggressive sweeping") \ 3149 range(0, 2000) \ 3150 \ 3151 notproduct(bool, LogSweeper, false, \ 3152 "Keep a ring buffer of sweeper activity") \ 3153 \ 3154 notproduct(intx, SweeperLogEntries, 1024, \ 3155 "Number of records in the ring buffer of sweeper activity") \ 3156 \ 3157 notproduct(intx, MemProfilingInterval, 500, \ 3158 "Time between each invocation of the MemProfiler") \ 3159 \ 3160 develop(intx, MallocCatchPtr, -1, \ 3161 "Hit breakpoint when mallocing/freeing this pointer") \ 3162 \ 3163 notproduct(ccstrlist, SuppressErrorAt, "", \ 3164 "List of assertions (file:line) to muzzle") \ 3165 \ 3166 notproduct(size_t, HandleAllocationLimit, 1024, \ 3167 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 3168 "is used") \ 3169 \ 3170 develop(size_t, TotalHandleAllocationLimit, 1024, \ 3171 "Threshold for total handle allocation when " \ 3172 "+TraceHandleAllocation is used") \ 3173 \ 3174 develop(intx, StackPrintLimit, 100, \ 3175 "number of stack frames to print in VM-level stack dump") \ 3176 \ 3177 notproduct(intx, MaxElementPrintSize, 256, \ 3178 "maximum number of elements to print") \ 3179 \ 3180 notproduct(intx, MaxSubklassPrintSize, 4, \ 3181 "maximum number of subklasses to print when printing klass") \ 3182 \ 3183 product(intx, MaxInlineLevel, 9, \ 3184 "maximum number of nested calls that are inlined") \ 3185 range(0, max_jint) \ 3186 \ 3187 product(intx, MaxRecursiveInlineLevel, 1, \ 3188 "maximum number of nested recursive calls that are inlined") \ 3189 range(0, max_jint) \ 3190 \ 3191 develop(intx, MaxForceInlineLevel, 100, \ 3192 "maximum number of nested calls that are forced for inlining " \ 3193 "(using CompileCommand or marked w/ @ForceInline)") \ 3194 range(0, max_jint) \ 3195 \ 3196 product_pd(intx, InlineSmallCode, \ 3197 "Only inline already compiled methods if their code size is " \ 3198 "less than this") \ 3199 range(0, max_jint) \ 3200 \ 3201 product(intx, MaxInlineSize, 35, \ 3202 "The maximum bytecode size of a method to be inlined") \ 3203 range(0, max_jint) \ 3204 \ 3205 product_pd(intx, FreqInlineSize, \ 3206 "The maximum bytecode size of a frequent method to be inlined") \ 3207 range(0, max_jint) \ 3208 \ 3209 product(intx, MaxTrivialSize, 6, \ 3210 "The maximum bytecode size of a trivial method to be inlined") \ 3211 range(0, max_jint) \ 3212 \ 3213 product(intx, MinInliningThreshold, 250, \ 3214 "The minimum invocation count a method needs to have to be " \ 3215 "inlined") \ 3216 range(0, max_jint) \ 3217 \ 3218 develop(intx, MethodHistogramCutoff, 100, \ 3219 "The cutoff value for method invocation histogram (+CountCalls)") \ 3220 \ 3221 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3222 "Number of interpreted methods to show in profile") \ 3223 \ 3224 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 3225 "Number of compiled methods to show in profile") \ 3226 \ 3227 develop(intx, ProfilerNumberOfStubMethods, 25, \ 3228 "Number of stub methods to show in profile") \ 3229 \ 3230 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3231 "Number of runtime stub nodes to show in profile") \ 3232 \ 3233 product(intx, ProfileIntervalsTicks, 100, \ 3234 "Number of ticks between printing of interval profile " \ 3235 "(+ProfileIntervals)") \ 3236 range(0, max_intx) \ 3237 \ 3238 notproduct(intx, ScavengeALotInterval, 1, \ 3239 "Interval between which scavenge will occur with +ScavengeALot") \ 3240 \ 3241 notproduct(intx, FullGCALotInterval, 1, \ 3242 "Interval between which full gc will occur with +FullGCALot") \ 3243 \ 3244 notproduct(intx, FullGCALotStart, 0, \ 3245 "For which invocation to start FullGCAlot") \ 3246 \ 3247 notproduct(intx, FullGCALotDummies, 32*K, \ 3248 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3249 "to move") \ 3250 \ 3251 develop(intx, DontYieldALotInterval, 10, \ 3252 "Interval between which yields will be dropped (milliseconds)") \ 3253 \ 3254 develop(intx, MinSleepInterval, 1, \ 3255 "Minimum sleep() interval (milliseconds) when " \ 3256 "ConvertSleepToYield is off (used for Solaris)") \ 3257 \ 3258 develop(intx, ProfilerPCTickThreshold, 15, \ 3259 "Number of ticks in a PC buckets to be a hotspot") \ 3260 \ 3261 notproduct(intx, DeoptimizeALotInterval, 5, \ 3262 "Number of exits until DeoptimizeALot kicks in") \ 3263 \ 3264 notproduct(intx, ZombieALotInterval, 5, \ 3265 "Number of exits until ZombieALot kicks in") \ 3266 \ 3267 diagnostic(intx, MallocVerifyInterval, 0, \ 3268 "If non-zero, verify C heap after every N calls to " \ 3269 "malloc/realloc/free") \ 3270 range(0, max_intx) \ 3271 \ 3272 diagnostic(intx, MallocVerifyStart, 0, \ 3273 "If non-zero, start verifying C heap after Nth call to " \ 3274 "malloc/realloc/free") \ 3275 range(0, max_intx) \ 3276 \ 3277 diagnostic(uintx, MallocMaxTestWords, 0, \ 3278 "If non-zero, maximum number of words that malloc/realloc can " \ 3279 "allocate (for testing only)") \ 3280 range(0, max_uintx) \ 3281 \ 3282 product(intx, TypeProfileWidth, 2, \ 3283 "Number of receiver types to record in call/cast profile") \ 3284 range(0, 8) \ 3285 \ 3286 experimental(intx, MethodProfileWidth, 0, \ 3287 "Number of methods to record in call profile") \ 3288 \ 3289 develop(intx, BciProfileWidth, 2, \ 3290 "Number of return bci's to record in ret profile") \ 3291 \ 3292 product(intx, PerMethodRecompilationCutoff, 400, \ 3293 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3294 range(-1, max_intx) \ 3295 \ 3296 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3297 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3298 range(-1, max_intx) \ 3299 \ 3300 product(intx, PerMethodTrapLimit, 100, \ 3301 "Limit on traps (of one kind) in a method (includes inlines)") \ 3302 range(0, max_jint) \ 3303 \ 3304 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3305 "Limit on speculative traps (of one kind) in a method " \ 3306 "(includes inlines)") \ 3307 range(0, max_jint) \ 3308 \ 3309 product(intx, PerBytecodeTrapLimit, 4, \ 3310 "Limit on traps (of one kind) at a particular BCI") \ 3311 range(0, max_jint) \ 3312 \ 3313 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3314 "Extra method data trap entries for speculation") \ 3315 \ 3316 develop(intx, InlineFrequencyRatio, 20, \ 3317 "Ratio of call site execution to caller method invocation") \ 3318 range(0, max_jint) \ 3319 \ 3320 develop_pd(intx, InlineFrequencyCount, \ 3321 "Count of call site execution necessary to trigger frequent " \ 3322 "inlining") \ 3323 range(0, max_jint) \ 3324 \ 3325 develop(intx, InlineThrowCount, 50, \ 3326 "Force inlining of interpreted methods that throw this often") \ 3327 range(0, max_jint) \ 3328 \ 3329 develop(intx, InlineThrowMaxSize, 200, \ 3330 "Force inlining of throwing methods smaller than this") \ 3331 range(0, max_jint) \ 3332 \ 3333 develop(intx, ProfilerNodeSize, 1024, \ 3334 "Size in K to allocate for the Profile Nodes of each thread") \ 3335 range(0, 1024) \ 3336 \ 3337 /* gc parameters */ \ 3338 product(size_t, InitialHeapSize, 0, \ 3339 "Initial heap size (in bytes); zero means use ergonomics") \ 3340 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \ 3341 \ 3342 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3343 "Maximum heap size (in bytes)") \ 3344 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \ 3345 \ 3346 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3347 "Initial tenured generation size (in bytes)") \ 3348 \ 3349 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3350 "Initial new generation size (in bytes)") \ 3351 constraint(NewSizeConstraintFunc,AfterErgo) \ 3352 \ 3353 product(size_t, MaxNewSize, max_uintx, \ 3354 "Maximum new generation size (in bytes), max_uintx means set " \ 3355 "ergonomically") \ 3356 \ 3357 product(size_t, PretenureSizeThreshold, 0, \ 3358 "Maximum size in bytes of objects allocated in DefNew " \ 3359 "generation; zero means no maximum") \ 3360 \ 3361 product(size_t, MinTLABSize, 2*K, \ 3362 "Minimum allowed TLAB size (in bytes)") \ 3363 range(1, max_uintx) \ 3364 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \ 3365 \ 3366 product(size_t, TLABSize, 0, \ 3367 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3368 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \ 3369 \ 3370 product(size_t, YoungPLABSize, 4096, \ 3371 "Size of young gen promotion LAB's (in HeapWords)") \ 3372 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \ 3373 \ 3374 product(size_t, OldPLABSize, 1024, \ 3375 "Size of old gen promotion LAB's (in HeapWords), or Number " \ 3376 "of blocks to attempt to claim when refilling CMS LAB's") \ 3377 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \ 3378 \ 3379 product(uintx, TLABAllocationWeight, 35, \ 3380 "Allocation averaging weight") \ 3381 range(0, 100) \ 3382 \ 3383 /* Limit the lower bound of this flag to 1 as it is used */ \ 3384 /* in a division expression. */ \ 3385 product(uintx, TLABWasteTargetPercent, 1, \ 3386 "Percentage of Eden that can be wasted") \ 3387 range(1, 100) \ 3388 \ 3389 product(uintx, TLABRefillWasteFraction, 64, \ 3390 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3391 range(1, max_uintx) \ 3392 \ 3393 product(uintx, TLABWasteIncrement, 4, \ 3394 "Increment allowed waste at slow allocation") \ 3395 \ 3396 product(uintx, SurvivorRatio, 8, \ 3397 "Ratio of eden/survivor space size") \ 3398 range(1, max_uintx-2) \ 3399 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \ 3400 \ 3401 product(uintx, NewRatio, 2, \ 3402 "Ratio of old/new generation sizes") \ 3403 range(0, max_uintx-1) \ 3404 \ 3405 product_pd(size_t, NewSizeThreadIncrease, \ 3406 "Additional size added to desired new generation size per " \ 3407 "non-daemon thread (in bytes)") \ 3408 \ 3409 product_pd(size_t, MetaspaceSize, \ 3410 "Initial size of Metaspaces (in bytes)") \ 3411 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 3412 \ 3413 product(size_t, MaxMetaspaceSize, max_uintx, \ 3414 "Maximum size of Metaspaces (in bytes)") \ 3415 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 3416 \ 3417 product(size_t, CompressedClassSpaceSize, 1*G, \ 3418 "Maximum size of class area in Metaspace when compressed " \ 3419 "class pointers are used") \ 3420 range(1*M, 3*G) \ 3421 \ 3422 manageable(uintx, MinHeapFreeRatio, 40, \ 3423 "The minimum percentage of heap free after GC to avoid expansion."\ 3424 " For most GCs this applies to the old generation. In G1 and" \ 3425 " ParallelGC it applies to the whole heap.") \ 3426 range(0, 100) \ 3427 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 3428 \ 3429 manageable(uintx, MaxHeapFreeRatio, 70, \ 3430 "The maximum percentage of heap free after GC to avoid shrinking."\ 3431 " For most GCs this applies to the old generation. In G1 and" \ 3432 " ParallelGC it applies to the whole heap.") \ 3433 range(0, 100) \ 3434 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 3435 \ 3436 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3437 "Number of milliseconds per MB of free space in the heap") \ 3438 range(0, max_intx) \ 3439 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 3440 \ 3441 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3442 "The minimum change in heap space due to GC (in bytes)") \ 3443 \ 3444 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3445 "The minimum expansion of Metaspace (in bytes)") \ 3446 \ 3447 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3448 "The maximum percentage of Metaspace free after GC to avoid " \ 3449 "shrinking") \ 3450 range(0, 100) \ 3451 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3452 \ 3453 product(uintx, MinMetaspaceFreeRatio, 40, \ 3454 "The minimum percentage of Metaspace free after GC to avoid " \ 3455 "expansion") \ 3456 range(0, 99) \ 3457 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3458 \ 3459 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3460 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3461 \ 3462 product(uintx, QueuedAllocationWarningCount, 0, \ 3463 "Number of times an allocation that queues behind a GC " \ 3464 "will retry before printing a warning") \ 3465 \ 3466 diagnostic(uintx, VerifyGCStartAt, 0, \ 3467 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3468 \ 3469 diagnostic(intx, VerifyGCLevel, 0, \ 3470 "Generation level at which to start +VerifyBefore/AfterGC") \ 3471 range(0, 1) \ 3472 \ 3473 product(uintx, MaxTenuringThreshold, 15, \ 3474 "Maximum value for tenuring threshold") \ 3475 range(0, markOopDesc::max_age + 1) \ 3476 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \ 3477 \ 3478 product(uintx, InitialTenuringThreshold, 7, \ 3479 "Initial value for tenuring threshold") \ 3480 range(0, markOopDesc::max_age + 1) \ 3481 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \ 3482 \ 3483 product(uintx, TargetSurvivorRatio, 50, \ 3484 "Desired percentage of survivor space used after scavenge") \ 3485 range(0, 100) \ 3486 \ 3487 product(uintx, MarkSweepDeadRatio, 5, \ 3488 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3489 "Serial mark sweep treats this as both the minimum and maximum " \ 3490 "value. " \ 3491 "CMS uses this value only if it falls back to mark sweep. " \ 3492 "Par compact uses a variable scale based on the density of the " \ 3493 "generation and treats this as the maximum value when the heap " \ 3494 "is either completely full or completely empty. Par compact " \ 3495 "also has a smaller default value; see arguments.cpp.") \ 3496 range(0, 100) \ 3497 \ 3498 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3499 "How often should we fully compact the heap (ignoring the dead " \ 3500 "space parameters)") \ 3501 range(1, max_uintx) \ 3502 \ 3503 product(intx, PrintCMSStatistics, 0, \ 3504 "Statistics for CMS") \ 3505 \ 3506 product(bool, PrintCMSInitiationStatistics, false, \ 3507 "Statistics for initiating a CMS collection") \ 3508 \ 3509 product(intx, PrintFLSStatistics, 0, \ 3510 "Statistics for CMS' FreeListSpace") \ 3511 \ 3512 product(intx, PrintFLSCensus, 0, \ 3513 "Census for CMS' FreeListSpace") \ 3514 \ 3515 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3516 "Delay between expansion and allocation (in milliseconds)") \ 3517 \ 3518 develop(uintx, GCWorkerDelayMillis, 0, \ 3519 "Delay in scheduling GC workers (in milliseconds)") \ 3520 \ 3521 product(intx, DeferThrSuspendLoopCount, 4000, \ 3522 "(Unstable) Number of times to iterate in safepoint loop " \ 3523 "before blocking VM threads ") \ 3524 range(-1, max_jint-1) \ 3525 \ 3526 product(intx, DeferPollingPageLoopCount, -1, \ 3527 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3528 "before changing safepoint polling page to RO ") \ 3529 range(-1, max_jint-1) \ 3530 \ 3531 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3532 range(0, max_intx) \ 3533 \ 3534 product(bool, PSChunkLargeArrays, true, \ 3535 "Process large arrays in chunks") \ 3536 \ 3537 product(uintx, GCDrainStackTargetSize, 64, \ 3538 "Number of entries we will try to leave on the stack " \ 3539 "during parallel gc") \ 3540 \ 3541 /* stack parameters */ \ 3542 product_pd(intx, StackYellowPages, \ 3543 "Number of yellow zone (recoverable overflows) pages") \ 3544 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 3545 \ 3546 product_pd(intx, StackRedPages, \ 3547 "Number of red zone (unrecoverable overflows) pages") \ 3548 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 3549 \ 3550 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3551 product_pd(intx, StackShadowPages, \ 3552 "Number of shadow zone (for overflow checking) pages " \ 3553 "this should exceed the depth of the VM and native call stack") \ 3554 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 3555 \ 3556 product_pd(intx, ThreadStackSize, \ 3557 "Thread Stack Size (in Kbytes)") \ 3558 range(0, max_intx-os::vm_page_size()) \ 3559 \ 3560 product_pd(intx, VMThreadStackSize, \ 3561 "Non-Java Thread Stack Size (in Kbytes)") \ 3562 range(0, max_intx/(1 * K)) \ 3563 \ 3564 product_pd(intx, CompilerThreadStackSize, \ 3565 "Compiler Thread Stack Size (in Kbytes)") \ 3566 range(0, max_intx) \ 3567 \ 3568 develop_pd(size_t, JVMInvokeMethodSlack, \ 3569 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3570 \ 3571 /* code cache parameters */ \ 3572 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3573 develop(uintx, CodeCacheSegmentSize, \ 3574 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)), \ 3575 "Code cache segment size (in bytes) - smallest unit of " \ 3576 "allocation") \ 3577 range(1, 1024) \ 3578 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 3579 \ 3580 develop_pd(intx, CodeEntryAlignment, \ 3581 "Code entry alignment for generated code (in bytes)") \ 3582 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 3583 \ 3584 product_pd(intx, OptoLoopAlignment, \ 3585 "Align inner loops to zero relative to this modulus") \ 3586 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 3587 \ 3588 product_pd(uintx, InitialCodeCacheSize, \ 3589 "Initial code cache size (in bytes)") \ 3590 range(0, max_uintx) \ 3591 \ 3592 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3593 "Minimum code cache size (in bytes) required to start VM.") \ 3594 range(0, max_uintx) \ 3595 \ 3596 product(bool, SegmentedCodeCache, false, \ 3597 "Use a segmented code cache") \ 3598 \ 3599 product_pd(uintx, ReservedCodeCacheSize, \ 3600 "Reserved code cache size (in bytes) - maximum code cache size") \ 3601 range(0, max_uintx) \ 3602 \ 3603 product_pd(uintx, NonProfiledCodeHeapSize, \ 3604 "Size of code heap with non-profiled methods (in bytes)") \ 3605 range(0, max_uintx) \ 3606 \ 3607 product_pd(uintx, ProfiledCodeHeapSize, \ 3608 "Size of code heap with profiled methods (in bytes)") \ 3609 range(0, max_uintx) \ 3610 \ 3611 product_pd(uintx, NonNMethodCodeHeapSize, \ 3612 "Size of code heap with non-nmethods (in bytes)") \ 3613 range(0, max_uintx) \ 3614 \ 3615 product_pd(uintx, CodeCacheExpansionSize, \ 3616 "Code cache expansion size (in bytes)") \ 3617 range(0, max_uintx) \ 3618 \ 3619 develop_pd(uintx, CodeCacheMinBlockLength, \ 3620 "Minimum number of segments in a code cache block") \ 3621 range(1, 100) \ 3622 \ 3623 notproduct(bool, ExitOnFullCodeCache, false, \ 3624 "Exit the VM if we fill the code cache") \ 3625 \ 3626 product(bool, UseCodeCacheFlushing, true, \ 3627 "Remove cold/old nmethods from the code cache") \ 3628 \ 3629 product(uintx, StartAggressiveSweepingAt, 10, \ 3630 "Start aggressive sweeping if X[%] of the code cache is free." \ 3631 "Segmented code cache: X[%] of the non-profiled heap." \ 3632 "Non-segmented code cache: X[%] of the total code cache") \ 3633 range(0, 100) \ 3634 \ 3635 /* interpreter debugging */ \ 3636 develop(intx, BinarySwitchThreshold, 5, \ 3637 "Minimal number of lookupswitch entries for rewriting to binary " \ 3638 "switch") \ 3639 \ 3640 develop(intx, StopInterpreterAt, 0, \ 3641 "Stop interpreter execution at specified bytecode number") \ 3642 \ 3643 develop(intx, TraceBytecodesAt, 0, \ 3644 "Trace bytecodes starting with specified bytecode number") \ 3645 \ 3646 /* compiler interface */ \ 3647 develop(intx, CIStart, 0, \ 3648 "The id of the first compilation to permit") \ 3649 \ 3650 develop(intx, CIStop, max_jint, \ 3651 "The id of the last compilation to permit") \ 3652 \ 3653 develop(intx, CIStartOSR, 0, \ 3654 "The id of the first osr compilation to permit " \ 3655 "(CICountOSR must be on)") \ 3656 \ 3657 develop(intx, CIStopOSR, max_jint, \ 3658 "The id of the last osr compilation to permit " \ 3659 "(CICountOSR must be on)") \ 3660 \ 3661 develop(intx, CIBreakAtOSR, -1, \ 3662 "The id of osr compilation to break at") \ 3663 \ 3664 develop(intx, CIBreakAt, -1, \ 3665 "The id of compilation to break at") \ 3666 \ 3667 product(ccstrlist, CompileOnly, "", \ 3668 "List of methods (pkg/class.name) to restrict compilation to") \ 3669 \ 3670 product(ccstr, CompileCommandFile, NULL, \ 3671 "Read compiler commands from this file [.hotspot_compiler]") \ 3672 \ 3673 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 3674 "Read compiler directives from this file") \ 3675 \ 3676 product(ccstrlist, CompileCommand, "", \ 3677 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3678 \ 3679 develop(bool, ReplayCompiles, false, \ 3680 "Enable replay of compilations from ReplayDataFile") \ 3681 \ 3682 product(ccstr, ReplayDataFile, NULL, \ 3683 "File containing compilation replay information" \ 3684 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3685 \ 3686 product(ccstr, InlineDataFile, NULL, \ 3687 "File containing inlining replay information" \ 3688 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3689 \ 3690 develop(intx, ReplaySuppressInitializers, 2, \ 3691 "Control handling of class initialization during replay: " \ 3692 "0 - don't do anything special; " \ 3693 "1 - treat all class initializers as empty; " \ 3694 "2 - treat class initializers for application classes as empty; " \ 3695 "3 - allow all class initializers to run during bootstrap but " \ 3696 " pretend they are empty after starting replay") \ 3697 range(0, 3) \ 3698 \ 3699 develop(bool, ReplayIgnoreInitErrors, false, \ 3700 "Ignore exceptions thrown during initialization for replay") \ 3701 \ 3702 product(bool, DumpReplayDataOnError, true, \ 3703 "Record replay data for crashing compiler threads") \ 3704 \ 3705 product(bool, CICompilerCountPerCPU, false, \ 3706 "1 compiler thread for log(N CPUs)") \ 3707 \ 3708 develop(intx, CIFireOOMAt, -1, \ 3709 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3710 "(non-negative value throws OOM after this many CI accesses " \ 3711 "in each compile)") \ 3712 notproduct(intx, CICrashAt, -1, \ 3713 "id of compilation to trigger assert in compiler thread for " \ 3714 "the purpose of testing, e.g. generation of replay data") \ 3715 notproduct(bool, CIObjectFactoryVerify, false, \ 3716 "enable potentially expensive verification in ciObjectFactory") \ 3717 \ 3718 /* Priorities */ \ 3719 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3720 \ 3721 product(intx, ThreadPriorityPolicy, 0, \ 3722 "0 : Normal. "\ 3723 " VM chooses priorities that are appropriate for normal "\ 3724 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3725 " to normal native priority. Java priorities below " \ 3726 " NORM_PRIORITY map to lower native priority values. On "\ 3727 " Windows applications are allowed to use higher native "\ 3728 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3729 " not use the highest possible native priority, "\ 3730 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3731 " system threads. On Linux thread priorities are ignored "\ 3732 " because the OS does not support static priority in "\ 3733 " SCHED_OTHER scheduling class which is the only choice for "\ 3734 " non-root, non-realtime applications. "\ 3735 "1 : Aggressive. "\ 3736 " Java thread priorities map over to the entire range of "\ 3737 " native thread priorities. Higher Java thread priorities map "\ 3738 " to higher native thread priorities. This policy should be "\ 3739 " used with care, as sometimes it can cause performance "\ 3740 " degradation in the application and/or the entire system. On "\ 3741 " Linux this policy requires root privilege.") \ 3742 range(0, 1) \ 3743 \ 3744 product(bool, ThreadPriorityVerbose, false, \ 3745 "Print priority changes") \ 3746 \ 3747 product(intx, CompilerThreadPriority, -1, \ 3748 "The native priority at which compiler threads should run " \ 3749 "(-1 means no change)") \ 3750 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 3751 \ 3752 product(intx, VMThreadPriority, -1, \ 3753 "The native priority at which the VM thread should run " \ 3754 "(-1 means no change)") \ 3755 range(-1, 127) \ 3756 \ 3757 product(bool, CompilerThreadHintNoPreempt, true, \ 3758 "(Solaris only) Give compiler threads an extra quanta") \ 3759 \ 3760 product(bool, VMThreadHintNoPreempt, false, \ 3761 "(Solaris only) Give VM thread an extra quanta") \ 3762 \ 3763 product(intx, JavaPriority1_To_OSPriority, -1, \ 3764 "Map Java priorities to OS priorities") \ 3765 range(-1, 127) \ 3766 \ 3767 product(intx, JavaPriority2_To_OSPriority, -1, \ 3768 "Map Java priorities to OS priorities") \ 3769 range(-1, 127) \ 3770 \ 3771 product(intx, JavaPriority3_To_OSPriority, -1, \ 3772 "Map Java priorities to OS priorities") \ 3773 range(-1, 127) \ 3774 \ 3775 product(intx, JavaPriority4_To_OSPriority, -1, \ 3776 "Map Java priorities to OS priorities") \ 3777 range(-1, 127) \ 3778 \ 3779 product(intx, JavaPriority5_To_OSPriority, -1, \ 3780 "Map Java priorities to OS priorities") \ 3781 range(-1, 127) \ 3782 \ 3783 product(intx, JavaPriority6_To_OSPriority, -1, \ 3784 "Map Java priorities to OS priorities") \ 3785 range(-1, 127) \ 3786 \ 3787 product(intx, JavaPriority7_To_OSPriority, -1, \ 3788 "Map Java priorities to OS priorities") \ 3789 range(-1, 127) \ 3790 \ 3791 product(intx, JavaPriority8_To_OSPriority, -1, \ 3792 "Map Java priorities to OS priorities") \ 3793 range(-1, 127) \ 3794 \ 3795 product(intx, JavaPriority9_To_OSPriority, -1, \ 3796 "Map Java priorities to OS priorities") \ 3797 range(-1, 127) \ 3798 \ 3799 product(intx, JavaPriority10_To_OSPriority,-1, \ 3800 "Map Java priorities to OS priorities") \ 3801 range(-1, 127) \ 3802 \ 3803 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3804 "Java thread priority 10 maps to critical scheduling priority") \ 3805 \ 3806 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3807 "Compiler thread(s) run at critical scheduling priority") \ 3808 \ 3809 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3810 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3811 \ 3812 /* compiler debugging */ \ 3813 notproduct(intx, CompileTheWorldStartAt, 1, \ 3814 "First class to consider when using +CompileTheWorld") \ 3815 \ 3816 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3817 "Last class to consider when using +CompileTheWorld") \ 3818 \ 3819 develop(intx, NewCodeParameter, 0, \ 3820 "Testing Only: Create a dedicated integer parameter before " \ 3821 "putback") \ 3822 \ 3823 /* new oopmap storage allocation */ \ 3824 develop(intx, MinOopMapAllocation, 8, \ 3825 "Minimum number of OopMap entries in an OopMapSet") \ 3826 \ 3827 /* Background Compilation */ \ 3828 develop(intx, LongCompileThreshold, 50, \ 3829 "Used with +TraceLongCompiles") \ 3830 \ 3831 /* recompilation */ \ 3832 product_pd(intx, CompileThreshold, \ 3833 "number of interpreted method invocations before (re-)compiling") \ 3834 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 3835 \ 3836 product(double, CompileThresholdScaling, 1.0, \ 3837 "Factor to control when first compilation happens " \ 3838 "(both with and without tiered compilation): " \ 3839 "values greater than 1.0 delay counter overflow, " \ 3840 "values between 0 and 1.0 rush counter overflow, " \ 3841 "value of 1.0 leaves compilation thresholds unchanged " \ 3842 "value of 0.0 is equivalent to -Xint. " \ 3843 "" \ 3844 "Flag can be set as per-method option. " \ 3845 "If a value is specified for a method, compilation thresholds " \ 3846 "for that method are scaled by both the value of the global flag "\ 3847 "and the value of the per-method flag.") \ 3848 range(0.0, DBL_MAX) \ 3849 \ 3850 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3851 "Interpreter (tier 0) invocation notification frequency") \ 3852 range(0, 30) \ 3853 \ 3854 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3855 "C1 without MDO (tier 2) invocation notification frequency") \ 3856 range(0, 30) \ 3857 \ 3858 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3859 "C1 with MDO profiling (tier 3) invocation notification " \ 3860 "frequency") \ 3861 range(0, 30) \ 3862 \ 3863 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3864 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3865 range(0, 30) \ 3866 \ 3867 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3868 "Interpreter (tier 0) invocation notification frequency") \ 3869 range(0, 30) \ 3870 \ 3871 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3872 "C1 without MDO (tier 2) invocation notification frequency") \ 3873 range(0, 30) \ 3874 \ 3875 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3876 "C1 with MDO profiling (tier 3) invocation notification " \ 3877 "frequency") \ 3878 range(0, 30) \ 3879 \ 3880 product(intx, Tier2CompileThreshold, 0, \ 3881 "threshold at which tier 2 compilation is invoked") \ 3882 range(0, max_jint) \ 3883 \ 3884 product(intx, Tier2BackEdgeThreshold, 0, \ 3885 "Back edge threshold at which tier 2 compilation is invoked") \ 3886 range(0, max_jint) \ 3887 \ 3888 product(intx, Tier3InvocationThreshold, 200, \ 3889 "Compile if number of method invocations crosses this " \ 3890 "threshold") \ 3891 range(0, max_jint) \ 3892 \ 3893 product(intx, Tier3MinInvocationThreshold, 100, \ 3894 "Minimum invocation to compile at tier 3") \ 3895 range(0, max_jint) \ 3896 \ 3897 product(intx, Tier3CompileThreshold, 2000, \ 3898 "Threshold at which tier 3 compilation is invoked (invocation " \ 3899 "minimum must be satisfied)") \ 3900 range(0, max_jint) \ 3901 \ 3902 product(intx, Tier3BackEdgeThreshold, 60000, \ 3903 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3904 range(0, max_jint) \ 3905 \ 3906 product(intx, Tier4InvocationThreshold, 5000, \ 3907 "Compile if number of method invocations crosses this " \ 3908 "threshold") \ 3909 range(0, max_jint) \ 3910 \ 3911 product(intx, Tier4MinInvocationThreshold, 600, \ 3912 "Minimum invocation to compile at tier 4") \ 3913 range(0, max_jint) \ 3914 \ 3915 product(intx, Tier4CompileThreshold, 15000, \ 3916 "Threshold at which tier 4 compilation is invoked (invocation " \ 3917 "minimum must be satisfied") \ 3918 range(0, max_jint) \ 3919 \ 3920 product(intx, Tier4BackEdgeThreshold, 40000, \ 3921 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3922 range(0, max_jint) \ 3923 \ 3924 product(intx, Tier3DelayOn, 5, \ 3925 "If C2 queue size grows over this amount per compiler thread " \ 3926 "stop compiling at tier 3 and start compiling at tier 2") \ 3927 range(0, max_jint) \ 3928 \ 3929 product(intx, Tier3DelayOff, 2, \ 3930 "If C2 queue size is less than this amount per compiler thread " \ 3931 "allow methods compiled at tier 2 transition to tier 3") \ 3932 range(0, max_jint) \ 3933 \ 3934 product(intx, Tier3LoadFeedback, 5, \ 3935 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3936 "reaches this amount per compiler thread") \ 3937 range(0, max_jint) \ 3938 \ 3939 product(intx, Tier4LoadFeedback, 3, \ 3940 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3941 "reaches this amount per compiler thread") \ 3942 range(0, max_jint) \ 3943 \ 3944 product(intx, TieredCompileTaskTimeout, 50, \ 3945 "Kill compile task if method was not used within " \ 3946 "given timeout in milliseconds") \ 3947 range(0, max_intx) \ 3948 \ 3949 product(intx, TieredStopAtLevel, 4, \ 3950 "Stop at given compilation level") \ 3951 range(0, 4) \ 3952 \ 3953 product(intx, Tier0ProfilingStartPercentage, 200, \ 3954 "Start profiling in interpreter if the counters exceed tier 3 " \ 3955 "thresholds by the specified percentage") \ 3956 range(0, max_jint) \ 3957 \ 3958 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3959 "Increase the compile threshold for C1 compilation if the code " \ 3960 "cache is filled by the specified percentage") \ 3961 range(0, 99) \ 3962 \ 3963 product(intx, TieredRateUpdateMinTime, 1, \ 3964 "Minimum rate sampling interval (in milliseconds)") \ 3965 range(0, max_intx) \ 3966 \ 3967 product(intx, TieredRateUpdateMaxTime, 25, \ 3968 "Maximum rate sampling interval (in milliseconds)") \ 3969 range(0, max_intx) \ 3970 \ 3971 product_pd(bool, TieredCompilation, \ 3972 "Enable tiered compilation") \ 3973 \ 3974 product(bool, PrintTieredEvents, false, \ 3975 "Print tiered events notifications") \ 3976 \ 3977 product_pd(intx, OnStackReplacePercentage, \ 3978 "NON_TIERED number of method invocations/branches (expressed as " \ 3979 "% of CompileThreshold) before (re-)compiling OSR code") \ 3980 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 3981 \ 3982 product(intx, InterpreterProfilePercentage, 33, \ 3983 "NON_TIERED number of method invocations/branches (expressed as " \ 3984 "% of CompileThreshold) before profiling in the interpreter") \ 3985 range(0, 100) \ 3986 \ 3987 develop(intx, MaxRecompilationSearchLength, 10, \ 3988 "The maximum number of frames to inspect when searching for " \ 3989 "recompilee") \ 3990 \ 3991 develop(intx, MaxInterpretedSearchLength, 3, \ 3992 "The maximum number of interpreted frames to skip when searching "\ 3993 "for recompilee") \ 3994 \ 3995 develop(intx, DesiredMethodLimit, 8000, \ 3996 "The desired maximum method size (in bytecodes) after inlining") \ 3997 \ 3998 develop(intx, HugeMethodLimit, 8000, \ 3999 "Don't compile methods larger than this if " \ 4000 "+DontCompileHugeMethods") \ 4001 \ 4002 /* New JDK 1.4 reflection implementation */ \ 4003 \ 4004 develop(intx, FastSuperclassLimit, 8, \ 4005 "Depth of hardwired instanceof accelerator array") \ 4006 \ 4007 /* Properties for Java libraries */ \ 4008 \ 4009 product(size_t, MaxDirectMemorySize, 0, \ 4010 "Maximum total size of NIO direct-buffer allocations") \ 4011 range(0, (size_t)SIZE_MAX) \ 4012 \ 4013 /* Flags used for temporary code during development */ \ 4014 \ 4015 diagnostic(bool, UseNewCode, false, \ 4016 "Testing Only: Use the new version while testing") \ 4017 \ 4018 diagnostic(bool, UseNewCode2, false, \ 4019 "Testing Only: Use the new version while testing") \ 4020 \ 4021 diagnostic(bool, UseNewCode3, false, \ 4022 "Testing Only: Use the new version while testing") \ 4023 \ 4024 /* flags for performance data collection */ \ 4025 \ 4026 product(bool, UsePerfData, falseInEmbedded, \ 4027 "Flag to disable jvmstat instrumentation for performance testing "\ 4028 "and problem isolation purposes") \ 4029 \ 4030 product(bool, PerfDataSaveToFile, false, \ 4031 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 4032 \ 4033 product(ccstr, PerfDataSaveFile, NULL, \ 4034 "Save PerfData memory to the specified absolute pathname. " \ 4035 "The string %p in the file name (if present) " \ 4036 "will be replaced by pid") \ 4037 \ 4038 product(intx, PerfDataSamplingInterval, 50, \ 4039 "Data sampling interval (in milliseconds)") \ 4040 range(PeriodicTask::min_interval, max_jint) \ 4041 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 4042 \ 4043 develop(bool, PerfTraceDataCreation, false, \ 4044 "Trace creation of Performance Data Entries") \ 4045 \ 4046 develop(bool, PerfTraceMemOps, false, \ 4047 "Trace PerfMemory create/attach/detach calls") \ 4048 \ 4049 product(bool, PerfDisableSharedMem, false, \ 4050 "Store performance data in standard memory") \ 4051 \ 4052 product(intx, PerfDataMemorySize, 64*K, \ 4053 "Size of performance data memory region. Will be rounded " \ 4054 "up to a multiple of the native os page size.") \ 4055 range(128, 32*64*K) \ 4056 \ 4057 product(intx, PerfMaxStringConstLength, 1024, \ 4058 "Maximum PerfStringConstant string length before truncation") \ 4059 range(32, 32*K) \ 4060 \ 4061 product(bool, PerfAllowAtExitRegistration, false, \ 4062 "Allow registration of atexit() methods") \ 4063 \ 4064 product(bool, PerfBypassFileSystemCheck, false, \ 4065 "Bypass Win32 file system criteria checks (Windows Only)") \ 4066 \ 4067 product(intx, UnguardOnExecutionViolation, 0, \ 4068 "Unguard page and retry on no-execute fault (Win32 only) " \ 4069 "0=off, 1=conservative, 2=aggressive") \ 4070 range(0, 2) \ 4071 \ 4072 /* Serviceability Support */ \ 4073 \ 4074 product(bool, ManagementServer, false, \ 4075 "Create JMX Management Server") \ 4076 \ 4077 product(bool, DisableAttachMechanism, false, \ 4078 "Disable mechanism that allows tools to attach to this VM") \ 4079 \ 4080 product(bool, StartAttachListener, false, \ 4081 "Always start Attach Listener at VM startup") \ 4082 \ 4083 manageable(bool, PrintConcurrentLocks, false, \ 4084 "Print java.util.concurrent locks in thread dump") \ 4085 \ 4086 product(bool, TransmitErrorReport, false, \ 4087 "Enable error report transmission on erroneous termination") \ 4088 \ 4089 product(ccstr, ErrorReportServer, NULL, \ 4090 "Override built-in error report server address") \ 4091 \ 4092 /* Shared spaces */ \ 4093 \ 4094 product(bool, UseSharedSpaces, true, \ 4095 "Use shared spaces for metadata") \ 4096 \ 4097 product(bool, VerifySharedSpaces, false, \ 4098 "Verify shared spaces (false for default archive, true for " \ 4099 "archive specified by -XX:SharedArchiveFile)") \ 4100 \ 4101 product(bool, RequireSharedSpaces, false, \ 4102 "Require shared spaces for metadata") \ 4103 \ 4104 product(bool, DumpSharedSpaces, false, \ 4105 "Special mode: JVM reads a class list, loads classes, builds " \ 4106 "shared spaces, and dumps the shared spaces to a file to be " \ 4107 "used in future JVM runs") \ 4108 \ 4109 product(bool, PrintSharedSpaces, false, \ 4110 "Print usage of shared spaces") \ 4111 \ 4112 product(bool, PrintSharedArchiveAndExit, false, \ 4113 "Print shared archive file contents") \ 4114 \ 4115 product(bool, PrintSharedDictionary, false, \ 4116 "If PrintSharedArchiveAndExit is true, also print the shared " \ 4117 "dictionary") \ 4118 \ 4119 product(size_t, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 4120 "Size of read-write space for metadata (in bytes)") \ 4121 \ 4122 product(size_t, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 4123 "Size of read-only space for metadata (in bytes)") \ 4124 \ 4125 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 4126 "Size of the shared miscellaneous data area (in bytes)") \ 4127 \ 4128 product(uintx, SharedMiscCodeSize, 120*K, \ 4129 "Size of the shared miscellaneous code area (in bytes)") \ 4130 \ 4131 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \ 4132 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 4133 "Address to allocate shared memory region for class data") \ 4134 \ 4135 product(uintx, SharedSymbolTableBucketSize, 4, \ 4136 "Average number of symbols per bucket in shared table") \ 4137 range(2, 246) \ 4138 \ 4139 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 4140 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 4141 "classes. Just exclude them from the shared dictionary.") \ 4142 \ 4143 diagnostic(bool, PrintMethodHandleStubs, false, \ 4144 "Print generated stub code for method handles") \ 4145 \ 4146 develop(bool, TraceMethodHandles, false, \ 4147 "trace internal method handle operations") \ 4148 \ 4149 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4150 "perform extra checks when constructing method handles") \ 4151 \ 4152 diagnostic(bool, ShowHiddenFrames, false, \ 4153 "show method handle implementation frames (usually hidden)") \ 4154 \ 4155 experimental(bool, TrustFinalNonStaticFields, false, \ 4156 "trust final non-static declarations for constant folding") \ 4157 \ 4158 diagnostic(bool, FoldStableValues, true, \ 4159 "Optimize loads from stable fields (marked w/ @Stable)") \ 4160 \ 4161 develop(bool, TraceInvokeDynamic, false, \ 4162 "trace internal invoke dynamic operations") \ 4163 \ 4164 diagnostic(bool, PauseAtStartup, false, \ 4165 "Causes the VM to pause at startup time and wait for the pause " \ 4166 "file to be removed (default: ./vm.paused.<pid>)") \ 4167 \ 4168 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4169 "The file to create and for whose removal to await when pausing " \ 4170 "at startup. (default: ./vm.paused.<pid>)") \ 4171 \ 4172 diagnostic(bool, PauseAtExit, false, \ 4173 "Pause and wait for keypress on exit if a debugger is attached") \ 4174 \ 4175 product(bool, ExtendedDTraceProbes, false, \ 4176 "Enable performance-impacting dtrace probes") \ 4177 \ 4178 product(bool, DTraceMethodProbes, false, \ 4179 "Enable dtrace probes for method-entry and method-exit") \ 4180 \ 4181 product(bool, DTraceAllocProbes, false, \ 4182 "Enable dtrace probes for object allocation") \ 4183 \ 4184 product(bool, DTraceMonitorProbes, false, \ 4185 "Enable dtrace probes for monitor events") \ 4186 \ 4187 product(bool, RelaxAccessControlCheck, false, \ 4188 "Relax the access control checks in the verifier") \ 4189 \ 4190 product(uintx, StringTableSize, defaultStringTableSize, \ 4191 "Number of buckets in the interned String table") \ 4192 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4193 \ 4194 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4195 "Number of buckets in the JVM internal Symbol table") \ 4196 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4197 \ 4198 product(bool, UseStringDeduplication, false, \ 4199 "Use string deduplication") \ 4200 \ 4201 product(bool, PrintStringDeduplicationStatistics, false, \ 4202 "Print string deduplication statistics") \ 4203 \ 4204 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4205 "A string must reach this age (or be promoted to an old region) " \ 4206 "to be considered for deduplication") \ 4207 range(1, markOopDesc::max_age) \ 4208 \ 4209 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4210 "Force table resize every time the table is scanned") \ 4211 \ 4212 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4213 "Force table rehash every time the table is scanned") \ 4214 \ 4215 develop(bool, TraceDefaultMethods, false, \ 4216 "Trace the default method processing steps") \ 4217 \ 4218 diagnostic(bool, WhiteBoxAPI, false, \ 4219 "Enable internal testing APIs") \ 4220 \ 4221 product(bool, PrintGCCause, true, \ 4222 "Include GC cause in GC logging") \ 4223 \ 4224 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4225 "Default survivor space alignment in bytes") \ 4226 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 4227 \ 4228 product(bool , AllowNonVirtualCalls, false, \ 4229 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4230 \ 4231 product(ccstr, DumpLoadedClassList, NULL, \ 4232 "Dump the names all loaded classes, that could be stored into " \ 4233 "the CDS archive, in the specified file") \ 4234 \ 4235 product(ccstr, SharedClassListFile, NULL, \ 4236 "Override the default CDS class list") \ 4237 \ 4238 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4239 "Override the default location of the CDS archive file") \ 4240 \ 4241 product(ccstr, ExtraSharedClassListFile, NULL, \ 4242 "Extra classlist for building the CDS archive file") \ 4243 \ 4244 experimental(size_t, ArrayAllocatorMallocLimit, \ 4245 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4246 "Allocation less than this value will be allocated " \ 4247 "using malloc. Larger allocations will use mmap.") \ 4248 \ 4249 experimental(bool, AlwaysAtomicAccesses, false, \ 4250 "Accesses to all variables should always be atomic") \ 4251 \ 4252 product(bool, EnableTracing, false, \ 4253 "Enable event-based tracing") \ 4254 \ 4255 product(bool, UseLockedTracing, false, \ 4256 "Use locked-tracing when doing event-based tracing") \ 4257 \ 4258 diagnostic(bool, UseUnalignedAccesses, false, \ 4259 "Use unaligned memory accesses in sun.misc.Unsafe") \ 4260 \ 4261 product_pd(bool, PreserveFramePointer, \ 4262 "Use the FP register for holding the frame pointer " \ 4263 "and not as a general purpose register.") \ 4264 \ 4265 diagnostic(bool, StringCharIntrinsics, true, \ 4266 "Inline String*.getChar/putChar intrinsics.") \ 4267 \ 4268 diagnostic(bool, CheckIntrinsics, true, \ 4269 "When a class C is loaded, check that " \ 4270 "(1) all intrinsics defined by the VM for class C are present "\ 4271 "in the loaded class file and are marked with the " \ 4272 "@HotSpotIntrinsicCandidate annotation, that " \ 4273 "(2) there is an intrinsic registered for all loaded methods " \ 4274 "that are annotated with the @HotSpotIntrinsicCandidate " \ 4275 "annotation, and that " \ 4276 "(3) no orphan methods exist for class C (i.e., methods for " \ 4277 "which the VM declares an intrinsic but that are not declared "\ 4278 "in the loaded class C. " \ 4279 "Check (3) is available only in debug builds.") \ 4280 \ 4281 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 4282 "Disable backwards compatibility for compile commands.") \ 4283 \ 4284 diagnostic(bool, PrintCompilerDirectives, false, \ 4285 "Print compiler directives on installation.") 4286 4287/* 4288 * Macros for factoring of globals 4289 */ 4290 4291// Interface macros 4292#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4293#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4294#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4295#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4296#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4297#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4298#ifdef PRODUCT 4299#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value; 4300#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name; 4301#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name; 4302#else 4303#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4304#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4305#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4306#endif // PRODUCT 4307// Special LP64 flags, product only needed for now. 4308#ifdef _LP64 4309#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4310#else 4311#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4312#endif // _LP64 4313 4314// Implementation macros 4315#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4316#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4317#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4318#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4319#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4320#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4321#ifdef PRODUCT 4322#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value; 4323#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name; 4324#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value; 4325#else 4326#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4327#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4328#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4329#endif // PRODUCT 4330#ifdef _LP64 4331#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4332#else 4333#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4334#endif // _LP64 4335 4336// Only materialize src code for range checking when required, ignore otherwise 4337#define IGNORE_RANGE(a, b) 4338// Only materialize src code for contraint checking when required, ignore otherwise 4339#define IGNORE_CONSTRAINT(func,type) 4340 4341RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4342 DECLARE_PD_DEVELOPER_FLAG, \ 4343 DECLARE_PRODUCT_FLAG, \ 4344 DECLARE_PD_PRODUCT_FLAG, \ 4345 DECLARE_DIAGNOSTIC_FLAG, \ 4346 DECLARE_EXPERIMENTAL_FLAG, \ 4347 DECLARE_NOTPRODUCT_FLAG, \ 4348 DECLARE_MANAGEABLE_FLAG, \ 4349 DECLARE_PRODUCT_RW_FLAG, \ 4350 DECLARE_LP64_PRODUCT_FLAG, \ 4351 IGNORE_RANGE, \ 4352 IGNORE_CONSTRAINT) 4353 4354RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4355 DECLARE_PD_DEVELOPER_FLAG, \ 4356 DECLARE_PRODUCT_FLAG, \ 4357 DECLARE_PD_PRODUCT_FLAG, \ 4358 DECLARE_DIAGNOSTIC_FLAG, \ 4359 DECLARE_NOTPRODUCT_FLAG, \ 4360 IGNORE_RANGE, \ 4361 IGNORE_CONSTRAINT) 4362 4363ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4364 DECLARE_PRODUCT_FLAG, \ 4365 DECLARE_DIAGNOSTIC_FLAG, \ 4366 DECLARE_EXPERIMENTAL_FLAG, \ 4367 DECLARE_NOTPRODUCT_FLAG, \ 4368 IGNORE_RANGE, \ 4369 IGNORE_CONSTRAINT) 4370 4371// Extensions 4372 4373#include "runtime/globals_ext.hpp" 4374 4375#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4376