globals.hpp revision 9679:9689c3d3e2f8
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 "utilities/debug.hpp" 29#include <float.h> // for DBL_MAX 30 31// use this for flags that are true per default in the tiered build 32// but false in non-tiered builds, and vice versa 33#ifdef TIERED 34#define trueInTiered true 35#define falseInTiered false 36#else 37#define trueInTiered false 38#define falseInTiered true 39#endif 40 41#ifdef TARGET_ARCH_x86 42# include "globals_x86.hpp" 43#endif 44#ifdef TARGET_ARCH_sparc 45# include "globals_sparc.hpp" 46#endif 47#ifdef TARGET_ARCH_zero 48# include "globals_zero.hpp" 49#endif 50#ifdef TARGET_ARCH_arm 51# include "globals_arm.hpp" 52#endif 53#ifdef TARGET_ARCH_ppc 54# include "globals_ppc.hpp" 55#endif 56#ifdef TARGET_ARCH_aarch64 57# include "globals_aarch64.hpp" 58#endif 59#ifdef TARGET_OS_FAMILY_linux 60# include "globals_linux.hpp" 61#endif 62#ifdef TARGET_OS_FAMILY_solaris 63# include "globals_solaris.hpp" 64#endif 65#ifdef TARGET_OS_FAMILY_windows 66# include "globals_windows.hpp" 67#endif 68#ifdef TARGET_OS_FAMILY_aix 69# include "globals_aix.hpp" 70#endif 71#ifdef TARGET_OS_FAMILY_bsd 72# include "globals_bsd.hpp" 73#endif 74#ifdef TARGET_OS_ARCH_linux_x86 75# include "globals_linux_x86.hpp" 76#endif 77#ifdef TARGET_OS_ARCH_linux_sparc 78# include "globals_linux_sparc.hpp" 79#endif 80#ifdef TARGET_OS_ARCH_linux_zero 81# include "globals_linux_zero.hpp" 82#endif 83#ifdef TARGET_OS_ARCH_solaris_x86 84# include "globals_solaris_x86.hpp" 85#endif 86#ifdef TARGET_OS_ARCH_solaris_sparc 87# include "globals_solaris_sparc.hpp" 88#endif 89#ifdef TARGET_OS_ARCH_windows_x86 90# include "globals_windows_x86.hpp" 91#endif 92#ifdef TARGET_OS_ARCH_linux_arm 93# include "globals_linux_arm.hpp" 94#endif 95#ifdef TARGET_OS_ARCH_linux_ppc 96# include "globals_linux_ppc.hpp" 97#endif 98#ifdef TARGET_OS_ARCH_linux_aarch64 99# include "globals_linux_aarch64.hpp" 100#endif 101#ifdef TARGET_OS_ARCH_aix_ppc 102# include "globals_aix_ppc.hpp" 103#endif 104#ifdef TARGET_OS_ARCH_bsd_x86 105# include "globals_bsd_x86.hpp" 106#endif 107#ifdef TARGET_OS_ARCH_bsd_zero 108# include "globals_bsd_zero.hpp" 109#endif 110#ifdef COMPILER1 111#ifdef TARGET_ARCH_x86 112# include "c1_globals_x86.hpp" 113#endif 114#ifdef TARGET_ARCH_sparc 115# include "c1_globals_sparc.hpp" 116#endif 117#ifdef TARGET_ARCH_arm 118# include "c1_globals_arm.hpp" 119#endif 120#ifdef TARGET_ARCH_aarch64 121# include "c1_globals_aarch64.hpp" 122#endif 123#ifdef TARGET_OS_FAMILY_linux 124# include "c1_globals_linux.hpp" 125#endif 126#ifdef TARGET_OS_FAMILY_solaris 127# include "c1_globals_solaris.hpp" 128#endif 129#ifdef TARGET_OS_FAMILY_windows 130# include "c1_globals_windows.hpp" 131#endif 132#ifdef TARGET_OS_FAMILY_aix 133# include "c1_globals_aix.hpp" 134#endif 135#ifdef TARGET_OS_FAMILY_bsd 136# include "c1_globals_bsd.hpp" 137#endif 138#ifdef TARGET_ARCH_ppc 139# include "c1_globals_ppc.hpp" 140#endif 141#endif 142#ifdef COMPILER2 143#ifdef TARGET_ARCH_x86 144# include "c2_globals_x86.hpp" 145#endif 146#ifdef TARGET_ARCH_sparc 147# include "c2_globals_sparc.hpp" 148#endif 149#ifdef TARGET_ARCH_arm 150# include "c2_globals_arm.hpp" 151#endif 152#ifdef TARGET_ARCH_ppc 153# include "c2_globals_ppc.hpp" 154#endif 155#ifdef TARGET_ARCH_aarch64 156# include "c2_globals_aarch64.hpp" 157#endif 158#ifdef TARGET_OS_FAMILY_linux 159# include "c2_globals_linux.hpp" 160#endif 161#ifdef TARGET_OS_FAMILY_solaris 162# include "c2_globals_solaris.hpp" 163#endif 164#ifdef TARGET_OS_FAMILY_windows 165# include "c2_globals_windows.hpp" 166#endif 167#ifdef TARGET_OS_FAMILY_aix 168# include "c2_globals_aix.hpp" 169#endif 170#ifdef TARGET_OS_FAMILY_bsd 171# include "c2_globals_bsd.hpp" 172#endif 173#endif 174#ifdef SHARK 175#ifdef TARGET_ARCH_zero 176# include "shark_globals_zero.hpp" 177#endif 178#endif 179 180#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) && !INCLUDE_JVMCI 181define_pd_global(bool, BackgroundCompilation, false); 182define_pd_global(bool, UseTLAB, false); 183define_pd_global(bool, CICompileOSR, false); 184define_pd_global(bool, UseTypeProfile, false); 185define_pd_global(bool, UseOnStackReplacement, false); 186define_pd_global(bool, InlineIntrinsics, false); 187define_pd_global(bool, PreferInterpreterNativeStubs, true); 188define_pd_global(bool, ProfileInterpreter, false); 189define_pd_global(bool, ProfileTraps, false); 190define_pd_global(bool, TieredCompilation, false); 191 192define_pd_global(intx, CompileThreshold, 0); 193 194define_pd_global(intx, OnStackReplacePercentage, 0); 195define_pd_global(bool, ResizeTLAB, false); 196define_pd_global(intx, FreqInlineSize, 0); 197define_pd_global(size_t, NewSizeThreadIncrease, 4*K); 198define_pd_global(intx, InlineClassNatives, true); 199define_pd_global(intx, InlineUnsafeOps, true); 200define_pd_global(intx, InitialCodeCacheSize, 160*K); 201define_pd_global(intx, ReservedCodeCacheSize, 32*M); 202define_pd_global(intx, NonProfiledCodeHeapSize, 0); 203define_pd_global(intx, ProfiledCodeHeapSize, 0); 204define_pd_global(intx, NonNMethodCodeHeapSize, 32*M); 205 206define_pd_global(intx, CodeCacheExpansionSize, 32*K); 207define_pd_global(intx, CodeCacheMinBlockLength, 1); 208define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 209define_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 210define_pd_global(bool, NeverActAsServerClassMachine, true); 211define_pd_global(uint64_t,MaxRAM, 1ULL*G); 212#define CI_COMPILER_COUNT 0 213#else 214 215#if defined(COMPILER2) || INCLUDE_JVMCI 216#define CI_COMPILER_COUNT 2 217#else 218#define CI_COMPILER_COUNT 1 219#endif // COMPILER2 || INCLUDE_JVMCI 220 221#endif // no compilers 222 223// string type aliases used only in this file 224typedef const char* ccstr; 225typedef const char* ccstrlist; // represents string arguments which accumulate 226 227struct Flag { 228 enum Flags { 229 // value origin 230 DEFAULT = 0, 231 COMMAND_LINE = 1, 232 ENVIRON_VAR = 2, 233 CONFIG_FILE = 3, 234 MANAGEMENT = 4, 235 ERGONOMIC = 5, 236 ATTACH_ON_DEMAND = 6, 237 INTERNAL = 7, 238 239 LAST_VALUE_ORIGIN = INTERNAL, 240 VALUE_ORIGIN_BITS = 4, 241 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS), 242 243 // flag kind 244 KIND_PRODUCT = 1 << 4, 245 KIND_MANAGEABLE = 1 << 5, 246 KIND_DIAGNOSTIC = 1 << 6, 247 KIND_EXPERIMENTAL = 1 << 7, 248 KIND_NOT_PRODUCT = 1 << 8, 249 KIND_DEVELOP = 1 << 9, 250 KIND_PLATFORM_DEPENDENT = 1 << 10, 251 KIND_READ_WRITE = 1 << 11, 252 KIND_C1 = 1 << 12, 253 KIND_C2 = 1 << 13, 254 KIND_ARCH = 1 << 14, 255 KIND_SHARK = 1 << 15, 256 KIND_LP64_PRODUCT = 1 << 16, 257 KIND_COMMERCIAL = 1 << 17, 258 KIND_JVMCI = 1 << 18, 259 260 KIND_MASK = ~VALUE_ORIGIN_MASK 261 }; 262 263 enum Error { 264 // no error 265 SUCCESS = 0, 266 // flag name is missing 267 MISSING_NAME, 268 // flag value is missing 269 MISSING_VALUE, 270 // error parsing the textual form of the value 271 WRONG_FORMAT, 272 // flag is not writeable 273 NON_WRITABLE, 274 // flag value is outside of its bounds 275 OUT_OF_BOUNDS, 276 // flag value violates its constraint 277 VIOLATES_CONSTRAINT, 278 // there is no flag with the given name 279 INVALID_FLAG, 280 // other, unspecified error related to setting the flag 281 ERR_OTHER 282 }; 283 284 enum MsgType { 285 NONE = 0, 286 DIAGNOSTIC_FLAG_BUT_LOCKED, 287 EXPERIMENTAL_FLAG_BUT_LOCKED, 288 DEVELOPER_FLAG_BUT_PRODUCT_BUILD, 289 NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD 290 }; 291 292 const char* _type; 293 const char* _name; 294 void* _addr; 295 NOT_PRODUCT(const char* _doc;) 296 Flags _flags; 297 298 // points to all Flags static array 299 static Flag* flags; 300 301 // number of flags 302 static size_t numFlags; 303 304 static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); }; 305 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false); 306 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 307 308 void check_writable(); 309 310 bool is_bool() const; 311 bool get_bool() const; 312 void set_bool(bool value); 313 314 bool is_int() const; 315 int get_int() const; 316 void set_int(int value); 317 318 bool is_uint() const; 319 uint get_uint() const; 320 void set_uint(uint value); 321 322 bool is_intx() const; 323 intx get_intx() const; 324 void set_intx(intx value); 325 326 bool is_uintx() const; 327 uintx get_uintx() const; 328 void set_uintx(uintx value); 329 330 bool is_uint64_t() const; 331 uint64_t get_uint64_t() const; 332 void set_uint64_t(uint64_t value); 333 334 bool is_size_t() const; 335 size_t get_size_t() const; 336 void set_size_t(size_t value); 337 338 bool is_double() const; 339 double get_double() const; 340 void set_double(double value); 341 342 bool is_ccstr() const; 343 bool ccstr_accumulates() const; 344 ccstr get_ccstr() const; 345 void set_ccstr(ccstr value); 346 347 Flags get_origin(); 348 void set_origin(Flags origin); 349 350 bool is_default(); 351 bool is_ergonomic(); 352 bool is_command_line(); 353 354 bool is_product() const; 355 bool is_manageable() const; 356 bool is_diagnostic() const; 357 bool is_experimental() const; 358 bool is_notproduct() const; 359 bool is_develop() const; 360 bool is_read_write() const; 361 bool is_commercial() const; 362 363 bool is_constant_in_binary() const; 364 365 bool is_unlocker() const; 366 bool is_unlocked() const; 367 bool is_writeable() const; 368 bool is_external() const; 369 370 bool is_unlocker_ext() const; 371 bool is_unlocked_ext() const; 372 bool is_writeable_ext() const; 373 bool is_external_ext() const; 374 375 void unlock_diagnostic(); 376 377 Flag::MsgType get_locked_message(char*, int) const; 378 void get_locked_message_ext(char*, int) const; 379 380 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 381 void print_on(outputStream* st, bool withComments = false, bool printRanges = false); 382 void print_kind(outputStream* st); 383 void print_as_flag(outputStream* st); 384 385 static const char* flag_error_str(Flag::Error error); 386}; 387 388// debug flags control various aspects of the VM and are global accessible 389 390// use FlagSetting to temporarily change some debug flag 391// e.g. FlagSetting fs(DebugThisAndThat, true); 392// restored to previous value upon leaving scope 393class FlagSetting { 394 bool val; 395 bool* flag; 396 public: 397 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 398 ~FlagSetting() { *flag = val; } 399}; 400 401 402class CounterSetting { 403 intx* counter; 404 public: 405 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 406 ~CounterSetting() { (*counter)--; } 407}; 408 409class IntFlagSetting { 410 int val; 411 int* flag; 412 public: 413 IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; } 414 ~IntFlagSetting() { *flag = val; } 415}; 416 417class UIntFlagSetting { 418 uint val; 419 uint* flag; 420 public: 421 UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; } 422 ~UIntFlagSetting() { *flag = val; } 423}; 424 425class UIntXFlagSetting { 426 uintx val; 427 uintx* flag; 428 public: 429 UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 430 ~UIntXFlagSetting() { *flag = val; } 431}; 432 433class DoubleFlagSetting { 434 double val; 435 double* flag; 436 public: 437 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 438 ~DoubleFlagSetting() { *flag = val; } 439}; 440 441class SizeTFlagSetting { 442 size_t val; 443 size_t* flag; 444 public: 445 SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; } 446 ~SizeTFlagSetting() { *flag = val; } 447}; 448 449 450class CommandLineFlags { 451public: 452 static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false); 453 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); } 454 static Flag::Error boolAtPut(Flag* flag, bool* value, Flag::Flags origin); 455 static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin); 456 static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 457 458 static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false); 459 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); } 460 static Flag::Error intAtPut(Flag* flag, int* value, Flag::Flags origin); 461 static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin); 462 static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); } 463 464 static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false); 465 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); } 466 static Flag::Error uintAtPut(Flag* flag, uint* value, Flag::Flags origin); 467 static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin); 468 static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); } 469 470 static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false); 471 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); } 472 static Flag::Error intxAtPut(Flag* flag, intx* value, Flag::Flags origin); 473 static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin); 474 static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 475 476 static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false); 477 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); } 478 static Flag::Error uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin); 479 static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin); 480 static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 481 482 static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false); 483 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); } 484 static Flag::Error size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin); 485 static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin); 486 static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); } 487 488 static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false); 489 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); } 490 static Flag::Error uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin); 491 static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin); 492 static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 493 494 static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false); 495 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); } 496 static Flag::Error doubleAtPut(Flag* flag, double* value, Flag::Flags origin); 497 static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin); 498 static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 499 500 static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false); 501 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); } 502 // Contract: Flag will make private copy of the incoming value. 503 // Outgoing value is always malloc-ed, and caller MUST call free. 504 static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin); 505 static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 506 507 // Returns false if name is not a command line flag. 508 static bool wasSetOnCmdline(const char* name, bool* value); 509 static void printSetFlags(outputStream* out); 510 511 // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 512 static void printFlags(outputStream* out, bool withComments, bool printRanges = false); 513 514 static void verify() PRODUCT_RETURN; 515}; 516 517// use this for flags that are true by default in the debug version but 518// false in the optimized version, and vice versa 519#ifdef ASSERT 520#define trueInDebug true 521#define falseInDebug false 522#else 523#define trueInDebug false 524#define falseInDebug true 525#endif 526 527// use this for flags that are true per default in the product build 528// but false in development builds, and vice versa 529#ifdef PRODUCT 530#define trueInProduct true 531#define falseInProduct false 532#else 533#define trueInProduct false 534#define falseInProduct true 535#endif 536 537#ifdef JAVASE_EMBEDDED 538#define falseInEmbedded false 539#else 540#define falseInEmbedded true 541#endif 542 543// develop flags are settable / visible only during development and are constant in the PRODUCT version 544// product flags are always settable / visible 545// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 546 547// A flag must be declared with one of the following types: 548// bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 549// The type "ccstr" is an alias for "const char*" and is used 550// only in this file, because the macrology requires single-token type names. 551 552// Note: Diagnostic options not meant for VM tuning or for product modes. 553// They are to be used for VM quality assurance or field diagnosis 554// of VM bugs. They are hidden so that users will not be encouraged to 555// try them as if they were VM ordinary execution options. However, they 556// are available in the product version of the VM. Under instruction 557// from support engineers, VM customers can turn them on to collect 558// diagnostic information about VM problems. To use a VM diagnostic 559// option, you must first specify +UnlockDiagnosticVMOptions. 560// (This master switch also affects the behavior of -Xprintflags.) 561// 562// experimental flags are in support of features that are not 563// part of the officially supported product, but are available 564// for experimenting with. They could, for example, be performance 565// features that may not have undergone full or rigorous QA, but which may 566// help performance in some cases and released for experimentation 567// by the community of users and developers. This flag also allows one to 568// be able to build a fully supported product that nonetheless also 569// ships with some unsupported, lightly tested, experimental features. 570// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 571// UnlockExperimentalVMOptions flag, which allows the control and 572// modification of the experimental flags. 573// 574// Nota bene: neither diagnostic nor experimental options should be used casually, 575// and they are not supported on production loads, except under explicit 576// direction from support engineers. 577// 578// manageable flags are writeable external product flags. 579// They are dynamically writeable through the JDK management interface 580// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 581// These flags are external exported interface (see CCC). The list of 582// manageable flags can be queried programmatically through the management 583// interface. 584// 585// A flag can be made as "manageable" only if 586// - the flag is defined in a CCC as an external exported interface. 587// - the VM implementation supports dynamic setting of the flag. 588// This implies that the VM must *always* query the flag variable 589// and not reuse state related to the flag state at any given time. 590// - you want the flag to be queried programmatically by the customers. 591// 592// product_rw flags are writeable internal product flags. 593// They are like "manageable" flags but for internal/private use. 594// The list of product_rw flags are internal/private flags which 595// may be changed/removed in a future release. It can be set 596// through the management interface to get/set value 597// when the name of flag is supplied. 598// 599// A flag can be made as "product_rw" only if 600// - the VM implementation supports dynamic setting of the flag. 601// This implies that the VM must *always* query the flag variable 602// and not reuse state related to the flag state at any given time. 603// 604// Note that when there is a need to support develop flags to be writeable, 605// it can be done in the same way as product_rw. 606// 607// range is a macro that will expand to min and max arguments for range 608// checking code if provided - see commandLineFlagRangeList.hpp 609// 610// constraint is a macro that will expand to custom function call 611// for constraint checking if provided - see commandLineFlagConstraintList.hpp 612// 613 614#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product, range, constraint) \ 615 \ 616 lp64_product(bool, UseCompressedOops, false, \ 617 "Use 32-bit object references in 64-bit VM. " \ 618 "lp64_product means flag is always constant in 32 bit VM") \ 619 \ 620 lp64_product(bool, UseCompressedClassPointers, false, \ 621 "Use 32-bit class pointers in 64-bit VM. " \ 622 "lp64_product means flag is always constant in 32 bit VM") \ 623 \ 624 notproduct(bool, CheckCompressedOops, true, \ 625 "Generate checks in encoding/decoding code in debug VM") \ 626 \ 627 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 628 "Heap allocation steps through preferred address regions to find" \ 629 " where it can allocate the heap. Number of steps to take per " \ 630 "region.") \ 631 range(1, max_uintx) \ 632 \ 633 diagnostic(bool, PrintCompressedOopsMode, false, \ 634 "Print compressed oops base address and encoding mode") \ 635 \ 636 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 637 "Default object alignment in bytes, 8 is minimum") \ 638 range(8, 256) \ 639 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 640 \ 641 product(bool, AssumeMP, false, \ 642 "Instruct the VM to assume multiple processors are available") \ 643 \ 644 /* UseMembar is theoretically a temp flag used for memory barrier */ \ 645 /* removal testing. It was supposed to be removed before FCS but has */ \ 646 /* been re-added (see 6401008) */ \ 647 product_pd(bool, UseMembar, \ 648 "(Unstable) Issues membars on thread state transitions") \ 649 \ 650 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 651 "Clean the chunk pool asynchronously") \ 652 \ 653 experimental(bool, AlwaysSafeConstructors, false, \ 654 "Force safe construction, as if all fields are final.") \ 655 \ 656 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 657 "Enable normal processing of flags relating to field diagnostics")\ 658 \ 659 experimental(bool, UnlockExperimentalVMOptions, false, \ 660 "Enable normal processing of flags relating to experimental " \ 661 "features") \ 662 \ 663 product(bool, JavaMonitorsInStackTrace, true, \ 664 "Print information about Java monitor locks when the stacks are" \ 665 "dumped") \ 666 \ 667 product_pd(bool, UseLargePages, \ 668 "Use large page memory") \ 669 \ 670 product_pd(bool, UseLargePagesIndividualAllocation, \ 671 "Allocate large pages individually for better affinity") \ 672 \ 673 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 674 "Fail large pages individual allocation") \ 675 \ 676 product(bool, UseLargePagesInMetaspace, false, \ 677 "Use large page memory in metaspace. " \ 678 "Only used if UseLargePages is enabled.") \ 679 \ 680 develop(bool, TracePageSizes, false, \ 681 "Trace page size selection and usage") \ 682 \ 683 product(bool, UseNUMA, false, \ 684 "Use NUMA if available") \ 685 \ 686 product(bool, UseNUMAInterleaving, false, \ 687 "Interleave memory across NUMA nodes if available") \ 688 \ 689 product(size_t, NUMAInterleaveGranularity, 2*M, \ 690 "Granularity to use for NUMA interleaving on Windows OS") \ 691 range(os::vm_allocation_granularity(), max_uintx) \ 692 constraint(NUMAInterleaveGranularityConstraintFunc,AfterErgo) \ 693 \ 694 product(bool, ForceNUMA, false, \ 695 "Force NUMA optimizations on single-node/UMA systems") \ 696 \ 697 product(uintx, NUMAChunkResizeWeight, 20, \ 698 "Percentage (0-100) used to weight the current sample when " \ 699 "computing exponentially decaying average for " \ 700 "AdaptiveNUMAChunkSizing") \ 701 range(0, 100) \ 702 \ 703 product(size_t, NUMASpaceResizeRate, 1*G, \ 704 "Do not reallocate more than this amount per collection") \ 705 range(0, max_uintx) \ 706 \ 707 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 708 "Enable adaptive chunk sizing for NUMA") \ 709 \ 710 product(bool, NUMAStats, false, \ 711 "Print NUMA stats in detailed heap information") \ 712 \ 713 product(uintx, NUMAPageScanRate, 256, \ 714 "Maximum number of pages to include in the page scan procedure") \ 715 range(0, max_uintx) \ 716 \ 717 product_pd(bool, NeedsDeoptSuspend, \ 718 "True for register window machines (sparc/ia64)") \ 719 \ 720 product(intx, UseSSE, 99, \ 721 "Highest supported SSE instructions set on x86/x64") \ 722 range(0, 99) \ 723 \ 724 product(bool, UseAES, false, \ 725 "Control whether AES instructions can be used on x86/x64") \ 726 \ 727 product(bool, UseSHA, false, \ 728 "Control whether SHA instructions can be used " \ 729 "on SPARC and on ARM") \ 730 \ 731 product(bool, UseGHASHIntrinsics, false, \ 732 "Use intrinsics for GHASH versions of crypto") \ 733 \ 734 product(size_t, LargePageSizeInBytes, 0, \ 735 "Large page size (0 to let VM choose the page size)") \ 736 range(0, max_uintx) \ 737 \ 738 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 739 "Use large pages if maximum heap is at least this big") \ 740 range(0, max_uintx) \ 741 \ 742 product(bool, ForceTimeHighResolution, false, \ 743 "Using high time resolution (for Win32 only)") \ 744 \ 745 develop(bool, TraceItables, false, \ 746 "Trace initialization and use of itables") \ 747 \ 748 develop(bool, TracePcPatching, false, \ 749 "Trace usage of frame::patch_pc") \ 750 \ 751 develop(bool, TraceJumps, false, \ 752 "Trace assembly jumps in thread ring buffer") \ 753 \ 754 develop(bool, TraceRelocator, false, \ 755 "Trace the bytecode relocator") \ 756 \ 757 develop(bool, TraceLongCompiles, false, \ 758 "Print out every time compilation is longer than " \ 759 "a given threshold") \ 760 \ 761 develop(bool, SafepointALot, false, \ 762 "Generate a lot of safepoints. This works with " \ 763 "GuaranteedSafepointInterval") \ 764 \ 765 product_pd(bool, BackgroundCompilation, \ 766 "A thread requesting compilation is not blocked during " \ 767 "compilation") \ 768 \ 769 product(bool, PrintVMQWaitTime, false, \ 770 "Print out the waiting time in VM operation queue") \ 771 \ 772 develop(bool, TraceOopMapGeneration, false, \ 773 "Show OopMapGeneration") \ 774 \ 775 product(bool, MethodFlushing, true, \ 776 "Reclamation of zombie and not-entrant methods") \ 777 \ 778 develop(bool, VerifyStack, false, \ 779 "Verify stack of each thread when it is entering a runtime call") \ 780 \ 781 diagnostic(bool, ForceUnreachable, false, \ 782 "Make all non code cache addresses to be unreachable by " \ 783 "forcing use of 64bit literal fixups") \ 784 \ 785 notproduct(bool, StressDerivedPointers, false, \ 786 "Force scavenge when a derived pointer is detected on stack " \ 787 "after rtm call") \ 788 \ 789 develop(bool, TraceDerivedPointers, false, \ 790 "Trace traversal of derived pointers on stack") \ 791 \ 792 notproduct(bool, TraceCodeBlobStacks, false, \ 793 "Trace stack-walk of codeblobs") \ 794 \ 795 product(bool, PrintJNIResolving, false, \ 796 "Used to implement -v:jni") \ 797 \ 798 notproduct(bool, PrintRewrites, false, \ 799 "Print methods that are being rewritten") \ 800 \ 801 product(bool, UseInlineCaches, true, \ 802 "Use Inline Caches for virtual calls ") \ 803 \ 804 develop(bool, InlineArrayCopy, true, \ 805 "Inline arraycopy native that is known to be part of " \ 806 "base library DLL") \ 807 \ 808 develop(bool, InlineObjectHash, true, \ 809 "Inline Object::hashCode() native that is known to be part " \ 810 "of base library DLL") \ 811 \ 812 develop(bool, InlineNatives, true, \ 813 "Inline natives that are known to be part of base library DLL") \ 814 \ 815 develop(bool, InlineMathNatives, true, \ 816 "Inline SinD, CosD, etc.") \ 817 \ 818 develop(bool, InlineClassNatives, true, \ 819 "Inline Class.isInstance, etc") \ 820 \ 821 develop(bool, InlineThreadNatives, true, \ 822 "Inline Thread.currentThread, etc") \ 823 \ 824 develop(bool, InlineUnsafeOps, true, \ 825 "Inline memory ops (native methods) from Unsafe") \ 826 \ 827 product(bool, CriticalJNINatives, true, \ 828 "Check for critical JNI entry points") \ 829 \ 830 notproduct(bool, StressCriticalJNINatives, false, \ 831 "Exercise register saving code in critical natives") \ 832 \ 833 product(bool, UseSSE42Intrinsics, false, \ 834 "SSE4.2 versions of intrinsics") \ 835 \ 836 product(bool, UseAESIntrinsics, false, \ 837 "Use intrinsics for AES versions of crypto") \ 838 \ 839 product(bool, UseSHA1Intrinsics, false, \ 840 "Use intrinsics for SHA-1 crypto hash function. " \ 841 "Requires that UseSHA is enabled.") \ 842 \ 843 product(bool, UseSHA256Intrinsics, false, \ 844 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 845 "Requires that UseSHA is enabled.") \ 846 \ 847 product(bool, UseSHA512Intrinsics, false, \ 848 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 849 "Requires that UseSHA is enabled.") \ 850 \ 851 product(bool, UseCRC32Intrinsics, false, \ 852 "use intrinsics for java.util.zip.CRC32") \ 853 \ 854 product(bool, UseCRC32CIntrinsics, false, \ 855 "use intrinsics for java.util.zip.CRC32C") \ 856 \ 857 product(bool, UseAdler32Intrinsics, false, \ 858 "use intrinsics for java.util.zip.Adler32") \ 859 \ 860 diagnostic(ccstrlist, DisableIntrinsic, "", \ 861 "do not expand intrinsics whose (internal) names appear here") \ 862 \ 863 develop(bool, TraceCallFixup, false, \ 864 "Trace all call fixups") \ 865 \ 866 develop(bool, DeoptimizeALot, false, \ 867 "Deoptimize at every exit from the runtime system") \ 868 \ 869 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 870 "A comma separated list of bcis to deoptimize at") \ 871 \ 872 product(bool, DeoptimizeRandom, false, \ 873 "Deoptimize random frames on random exit from the runtime system")\ 874 \ 875 notproduct(bool, ZombieALot, false, \ 876 "Create zombies (non-entrant) at exit from the runtime system") \ 877 \ 878 product(bool, UnlinkSymbolsALot, false, \ 879 "Unlink unreferenced symbols from the symbol table at safepoints")\ 880 \ 881 notproduct(bool, WalkStackALot, false, \ 882 "Trace stack (no print) at every exit from the runtime system") \ 883 \ 884 product(bool, Debugging, false, \ 885 "Set when executing debug methods in debug.cpp " \ 886 "(to prevent triggering assertions)") \ 887 \ 888 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 889 "Enable strict checks that safepoints cannot happen for threads " \ 890 "that use No_Safepoint_Verifier") \ 891 \ 892 notproduct(bool, VerifyLastFrame, false, \ 893 "Verify oops on last frame on entry to VM") \ 894 \ 895 develop(bool, TraceHandleAllocation, false, \ 896 "Print out warnings when suspiciously many handles are allocated")\ 897 \ 898 product(bool, FailOverToOldVerifier, true, \ 899 "Fail over to old verifier when split verifier fails") \ 900 \ 901 develop(bool, ShowSafepointMsgs, false, \ 902 "Show message about safepoint synchronization") \ 903 \ 904 product(bool, SafepointTimeout, false, \ 905 "Time out and warn or fail after SafepointTimeoutDelay " \ 906 "milliseconds if failed to reach safepoint") \ 907 \ 908 develop(bool, DieOnSafepointTimeout, false, \ 909 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 910 \ 911 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 912 /* typically, at most a few retries are needed */ \ 913 product(intx, SuspendRetryCount, 50, \ 914 "Maximum retry count for an external suspend request") \ 915 range(0, max_intx) \ 916 \ 917 product(intx, SuspendRetryDelay, 5, \ 918 "Milliseconds to delay per retry (* current_retry_count)") \ 919 range(0, max_intx) \ 920 \ 921 product(bool, AssertOnSuspendWaitFailure, false, \ 922 "Assert/Guarantee on external suspend wait failure") \ 923 \ 924 product(bool, TraceSuspendWaitFailures, false, \ 925 "Trace external suspend wait failures") \ 926 \ 927 product(bool, MaxFDLimit, true, \ 928 "Bump the number of file descriptors to maximum in Solaris") \ 929 \ 930 diagnostic(bool, LogEvents, true, \ 931 "Enable the various ring buffer event logs") \ 932 \ 933 diagnostic(uintx, LogEventsBufferEntries, 10, \ 934 "Number of ring buffer event logs") \ 935 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 936 \ 937 product(bool, BytecodeVerificationRemote, true, \ 938 "Enable the Java bytecode verifier for remote classes") \ 939 \ 940 product(bool, BytecodeVerificationLocal, false, \ 941 "Enable the Java bytecode verifier for local classes") \ 942 \ 943 develop(bool, ForceFloatExceptions, trueInDebug, \ 944 "Force exceptions on FP stack under/overflow") \ 945 \ 946 develop(bool, VerifyStackAtCalls, false, \ 947 "Verify that the stack pointer is unchanged after calls") \ 948 \ 949 develop(bool, TraceJavaAssertions, false, \ 950 "Trace java language assertions") \ 951 \ 952 notproduct(bool, CheckAssertionStatusDirectives, false, \ 953 "Temporary - see javaClasses.cpp") \ 954 \ 955 notproduct(bool, PrintMallocFree, false, \ 956 "Trace calls to C heap malloc/free allocation") \ 957 \ 958 product(bool, PrintOopAddress, false, \ 959 "Always print the location of the oop") \ 960 \ 961 notproduct(bool, VerifyCodeCache, false, \ 962 "Verify code cache on memory allocation/deallocation") \ 963 \ 964 develop(bool, UseMallocOnly, false, \ 965 "Use only malloc/free for allocation (no resource area/arena)") \ 966 \ 967 develop(bool, PrintMalloc, false, \ 968 "Print all malloc/free calls") \ 969 \ 970 develop(bool, PrintMallocStatistics, false, \ 971 "Print malloc/free statistics") \ 972 \ 973 develop(bool, ZapResourceArea, trueInDebug, \ 974 "Zap freed resource/arena space with 0xABABABAB") \ 975 \ 976 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 977 "Zap freed VM handle space with 0xBCBCBCBC") \ 978 \ 979 develop(bool, ZapJNIHandleArea, trueInDebug, \ 980 "Zap freed JNI handle space with 0xFEFEFEFE") \ 981 \ 982 notproduct(bool, ZapStackSegments, trueInDebug, \ 983 "Zap allocated/freed stack segments with 0xFADFADED") \ 984 \ 985 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 986 "Zap unused heap space with 0xBAADBABE") \ 987 \ 988 develop(bool, TraceZapUnusedHeapArea, false, \ 989 "Trace zapping of unused heap space") \ 990 \ 991 develop(bool, CheckZapUnusedHeapArea, false, \ 992 "Check zapping of unused heap space") \ 993 \ 994 develop(bool, ZapFillerObjects, trueInDebug, \ 995 "Zap filler objects with 0xDEAFBABE") \ 996 \ 997 develop(bool, PrintVMMessages, true, \ 998 "Print VM messages on console") \ 999 \ 1000 product(bool, PrintGCApplicationConcurrentTime, false, \ 1001 "Print the time the application has been running") \ 1002 \ 1003 product(bool, PrintGCApplicationStoppedTime, false, \ 1004 "Print the time the application has been stopped") \ 1005 \ 1006 diagnostic(bool, VerboseVerification, false, \ 1007 "Display detailed verification details") \ 1008 \ 1009 notproduct(uintx, ErrorHandlerTest, 0, \ 1010 "If > 0, provokes an error after VM initialization; the value " \ 1011 "determines which error to provoke. See test_error_handler() " \ 1012 "in debug.cpp.") \ 1013 \ 1014 notproduct(uintx, TestCrashInErrorHandler, 0, \ 1015 "If > 0, provokes an error inside VM error handler (a secondary " \ 1016 "crash). see test_error_handler() in debug.cpp.") \ 1017 \ 1018 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 1019 "If true, tests SafeFetch inside error handler.") \ 1020 \ 1021 develop(bool, Verbose, false, \ 1022 "Print additional debugging information from other modes") \ 1023 \ 1024 develop(bool, PrintMiscellaneous, false, \ 1025 "Print uncategorized debugging information (requires +Verbose)") \ 1026 \ 1027 develop(bool, WizardMode, false, \ 1028 "Print much more debugging information") \ 1029 \ 1030 product(bool, ShowMessageBoxOnError, false, \ 1031 "Keep process alive on VM fatal error") \ 1032 \ 1033 product(bool, CreateCoredumpOnCrash, true, \ 1034 "Create core/mini dump on VM fatal error") \ 1035 \ 1036 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 1037 "Timeout, in seconds, to limit the time spent on writing an " \ 1038 "error log in case of a crash.") \ 1039 range(0, (uint64_t)max_jlong/1000) \ 1040 \ 1041 product_pd(bool, UseOSErrorReporting, \ 1042 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 1043 \ 1044 product(bool, SuppressFatalErrorMessage, false, \ 1045 "Report NO fatal error message (avoid deadlock)") \ 1046 \ 1047 product(ccstrlist, OnError, "", \ 1048 "Run user-defined commands on fatal error; see VMError.cpp " \ 1049 "for examples") \ 1050 \ 1051 product(ccstrlist, OnOutOfMemoryError, "", \ 1052 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 1053 \ 1054 manageable(bool, HeapDumpBeforeFullGC, false, \ 1055 "Dump heap to file before any major stop-the-world GC") \ 1056 \ 1057 manageable(bool, HeapDumpAfterFullGC, false, \ 1058 "Dump heap to file after any major stop-the-world GC") \ 1059 \ 1060 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 1061 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 1062 \ 1063 manageable(ccstr, HeapDumpPath, NULL, \ 1064 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 1065 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 1066 "in the working directory)") \ 1067 \ 1068 develop(size_t, SegmentedHeapDumpThreshold, 2*G, \ 1069 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 1070 "when the heap usage is larger than this") \ 1071 \ 1072 develop(size_t, HeapDumpSegmentSize, 1*G, \ 1073 "Approximate segment size when generating a segmented heap dump") \ 1074 \ 1075 develop(bool, BreakAtWarning, false, \ 1076 "Execute breakpoint upon encountering VM warning") \ 1077 \ 1078 develop(bool, UseFakeTimers, false, \ 1079 "Tell whether the VM should use system time or a fake timer") \ 1080 \ 1081 product(ccstr, NativeMemoryTracking, "off", \ 1082 "Native memory tracking options") \ 1083 \ 1084 diagnostic(bool, PrintNMTStatistics, false, \ 1085 "Print native memory tracking summary data if it is on") \ 1086 \ 1087 diagnostic(bool, LogCompilation, false, \ 1088 "Log compilation activity in detail to LogFile") \ 1089 \ 1090 product(bool, PrintCompilation, false, \ 1091 "Print compilations") \ 1092 \ 1093 diagnostic(bool, TraceNMethodInstalls, false, \ 1094 "Trace nmethod installation") \ 1095 \ 1096 diagnostic(intx, ScavengeRootsInCode, 2, \ 1097 "0: do not allow scavengable oops in the code cache; " \ 1098 "1: allow scavenging from the code cache; " \ 1099 "2: emit as many constants as the compiler can see") \ 1100 range(0, 2) \ 1101 \ 1102 product(bool, AlwaysRestoreFPU, false, \ 1103 "Restore the FPU control word after every JNI call (expensive)") \ 1104 \ 1105 diagnostic(bool, PrintCompilation2, false, \ 1106 "Print additional statistics per compilation") \ 1107 \ 1108 diagnostic(bool, PrintAdapterHandlers, false, \ 1109 "Print code generated for i2c/c2i adapters") \ 1110 \ 1111 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 1112 "Verify that i2c/c2i adapters are called properly") \ 1113 \ 1114 develop(bool, VerifyAdapterSharing, false, \ 1115 "Verify that the code for shared adapters is the equivalent") \ 1116 \ 1117 diagnostic(bool, PrintAssembly, false, \ 1118 "Print assembly code (using external disassembler.so)") \ 1119 \ 1120 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 1121 "Print options string passed to disassembler.so") \ 1122 \ 1123 notproduct(bool, PrintNMethodStatistics, false, \ 1124 "Print a summary statistic for the generated nmethods") \ 1125 \ 1126 diagnostic(bool, PrintNMethods, false, \ 1127 "Print assembly code for nmethods when generated") \ 1128 \ 1129 diagnostic(bool, PrintNativeNMethods, false, \ 1130 "Print assembly code for native nmethods when generated") \ 1131 \ 1132 develop(bool, PrintDebugInfo, false, \ 1133 "Print debug information for all nmethods when generated") \ 1134 \ 1135 develop(bool, PrintRelocations, false, \ 1136 "Print relocation information for all nmethods when generated") \ 1137 \ 1138 develop(bool, PrintDependencies, false, \ 1139 "Print dependency information for all nmethods when generated") \ 1140 \ 1141 develop(bool, PrintExceptionHandlers, false, \ 1142 "Print exception handler tables for all nmethods when generated") \ 1143 \ 1144 develop(bool, StressCompiledExceptionHandlers, false, \ 1145 "Exercise compiled exception handlers") \ 1146 \ 1147 develop(bool, InterceptOSException, false, \ 1148 "Start debugger when an implicit OS (e.g. NULL) " \ 1149 "exception happens") \ 1150 \ 1151 product(bool, PrintCodeCache, false, \ 1152 "Print the code cache memory usage when exiting") \ 1153 \ 1154 develop(bool, PrintCodeCache2, false, \ 1155 "Print detailed usage information on the code cache when exiting")\ 1156 \ 1157 product(bool, PrintCodeCacheOnCompilation, false, \ 1158 "Print the code cache memory usage each time a method is " \ 1159 "compiled") \ 1160 \ 1161 diagnostic(bool, PrintStubCode, false, \ 1162 "Print generated stub code") \ 1163 \ 1164 product(bool, StackTraceInThrowable, true, \ 1165 "Collect backtrace in throwable when exception happens") \ 1166 \ 1167 product(bool, OmitStackTraceInFastThrow, true, \ 1168 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1169 \ 1170 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1171 "Print bytecode statistics when dumping profiler output") \ 1172 \ 1173 product(bool, ProfilerRecordPC, false, \ 1174 "Collect ticks for each 16 byte interval of compiled code") \ 1175 \ 1176 product(bool, ProfileVM, false, \ 1177 "Profile ticks that fall within VM (either in the VM Thread " \ 1178 "or VM code called through stubs)") \ 1179 \ 1180 product(bool, ProfileIntervals, false, \ 1181 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1182 \ 1183 notproduct(bool, ProfilerCheckIntervals, false, \ 1184 "Collect and print information on spacing of profiler ticks") \ 1185 \ 1186 product(bool, PrintWarnings, true, \ 1187 "Print JVM warnings to output stream") \ 1188 \ 1189 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1190 "Print warnings for stalled SpinLocks") \ 1191 \ 1192 product(bool, RegisterFinalizersAtInit, true, \ 1193 "Register finalizable objects at end of Object.<init> or " \ 1194 "after allocation") \ 1195 \ 1196 develop(bool, RegisterReferences, true, \ 1197 "Tell whether the VM should register soft/weak/final/phantom " \ 1198 "references") \ 1199 \ 1200 develop(bool, IgnoreRewrites, false, \ 1201 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1202 "This is unsafe!") \ 1203 \ 1204 develop(bool, PrintCodeCacheExtension, false, \ 1205 "Print extension of code cache") \ 1206 \ 1207 develop(bool, UsePrivilegedStack, true, \ 1208 "Enable the security JVM functions") \ 1209 \ 1210 develop(bool, ProtectionDomainVerification, true, \ 1211 "Verify protection domain before resolution in system dictionary")\ 1212 \ 1213 product(bool, ClassUnloading, true, \ 1214 "Do unloading of classes") \ 1215 \ 1216 product(bool, ClassUnloadingWithConcurrentMark, true, \ 1217 "Do unloading of classes with a concurrent marking cycle") \ 1218 \ 1219 develop(bool, DisableStartThread, false, \ 1220 "Disable starting of additional Java threads " \ 1221 "(for debugging only)") \ 1222 \ 1223 develop(bool, MemProfiling, false, \ 1224 "Write memory usage profiling to log file") \ 1225 \ 1226 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1227 "Print the system dictionary at exit") \ 1228 \ 1229 experimental(intx, PredictedLoadedClassCount, 0, \ 1230 "Experimental: Tune loaded class cache starting size") \ 1231 \ 1232 diagnostic(bool, UnsyncloadClass, false, \ 1233 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1234 "class loader must call VM synchronized for findClass " \ 1235 "and defineClass.") \ 1236 \ 1237 product(bool, AlwaysLockClassLoader, false, \ 1238 "Require the VM to acquire the class loader lock before calling " \ 1239 "loadClass() even for class loaders registering " \ 1240 "as parallel capable") \ 1241 \ 1242 product(bool, AllowParallelDefineClass, false, \ 1243 "Allow parallel defineClass requests for class loaders " \ 1244 "registering as parallel capable") \ 1245 \ 1246 product(bool, MustCallLoadClassInternal, false, \ 1247 "Call loadClassInternal() rather than loadClass()") \ 1248 \ 1249 product_pd(bool, DontYieldALot, \ 1250 "Throw away obvious excess yield calls") \ 1251 \ 1252 product_pd(bool, ConvertSleepToYield, \ 1253 "Convert sleep(0) to thread yield " \ 1254 "(may be off for Solaris to improve GUI)") \ 1255 \ 1256 product(bool, ConvertYieldToSleep, false, \ 1257 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1258 "behavior") \ 1259 \ 1260 develop(bool, UseDetachedThreads, true, \ 1261 "Use detached threads that are recycled upon termination " \ 1262 "(for Solaris only)") \ 1263 \ 1264 product(bool, UseLWPSynchronization, true, \ 1265 "Use LWP-based instead of libthread-based synchronization " \ 1266 "(SPARC only)") \ 1267 \ 1268 experimental(ccstr, SyncKnobs, NULL, \ 1269 "(Unstable) Various monitor synchronization tunables") \ 1270 \ 1271 experimental(intx, EmitSync, 0, \ 1272 "(Unsafe, Unstable) " \ 1273 "Control emission of inline sync fast-path code") \ 1274 \ 1275 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1276 range(0, max_jint) \ 1277 \ 1278 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1279 \ 1280 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1281 "Experimental Sync flags") \ 1282 \ 1283 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1284 \ 1285 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \ 1286 \ 1287 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1288 \ 1289 experimental(intx, hashCode, 5, \ 1290 "(Unstable) select hashCode generation algorithm") \ 1291 \ 1292 experimental(intx, WorkAroundNPTLTimedWaitHang, 0, \ 1293 "(Unstable, Linux-specific) " \ 1294 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \ 1295 \ 1296 product(bool, FilterSpuriousWakeups, true, \ 1297 "When true prevents OS-level spurious, or premature, wakeups " \ 1298 "from Object.wait (Ignored for Windows)") \ 1299 \ 1300 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1301 \ 1302 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1303 \ 1304 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1305 \ 1306 develop(bool, UsePthreads, false, \ 1307 "Use pthread-based instead of libthread-based synchronization " \ 1308 "(SPARC only)") \ 1309 \ 1310 product(bool, ReduceSignalUsage, false, \ 1311 "Reduce the use of OS signals in Java and/or the VM") \ 1312 \ 1313 develop_pd(bool, ShareVtableStubs, \ 1314 "Share vtable stubs (smaller code but worse branch prediction") \ 1315 \ 1316 develop(bool, LoadLineNumberTables, true, \ 1317 "Tell whether the class file parser loads line number tables") \ 1318 \ 1319 develop(bool, LoadLocalVariableTables, true, \ 1320 "Tell whether the class file parser loads local variable tables") \ 1321 \ 1322 develop(bool, LoadLocalVariableTypeTables, true, \ 1323 "Tell whether the class file parser loads local variable type" \ 1324 "tables") \ 1325 \ 1326 product(bool, AllowUserSignalHandlers, false, \ 1327 "Do not complain if the application installs signal handlers " \ 1328 "(Solaris & Linux only)") \ 1329 \ 1330 product(bool, UseSignalChaining, true, \ 1331 "Use signal-chaining to invoke signal handlers installed " \ 1332 "by the application (Solaris & Linux only)") \ 1333 \ 1334 product(bool, AllowJNIEnvProxy, false, \ 1335 "Allow JNIEnv proxies for jdbx") \ 1336 \ 1337 product(bool, RestoreMXCSROnJNICalls, false, \ 1338 "Restore MXCSR when returning from JNI calls") \ 1339 \ 1340 product(bool, CheckJNICalls, false, \ 1341 "Verify all arguments to JNI calls") \ 1342 \ 1343 product(bool, CheckEndorsedAndExtDirs, false, \ 1344 "Verify the endorsed and extension directories are not used") \ 1345 \ 1346 product(bool, UseFastJNIAccessors, true, \ 1347 "Use optimized versions of Get<Primitive>Field") \ 1348 \ 1349 product(intx, MaxJNILocalCapacity, 65536, \ 1350 "Maximum allowable local JNI handle capacity to " \ 1351 "EnsureLocalCapacity() and PushLocalFrame(), " \ 1352 "where <= 0 is unlimited, default: 65536") \ 1353 range(min_intx, max_intx) \ 1354 \ 1355 product(bool, EagerXrunInit, false, \ 1356 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1357 "but not all -Xrun libraries may support the state of the VM " \ 1358 "at this time") \ 1359 \ 1360 product(bool, PreserveAllAnnotations, false, \ 1361 "Preserve RuntimeInvisibleAnnotations as well " \ 1362 "as RuntimeVisibleAnnotations") \ 1363 \ 1364 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1365 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1366 \ 1367 product(bool, UseXMMForArrayCopy, false, \ 1368 "Use SSE2 MOVQ instruction for Arraycopy") \ 1369 \ 1370 product(intx, FieldsAllocationStyle, 1, \ 1371 "0 - type based with oops first, " \ 1372 "1 - with oops last, " \ 1373 "2 - oops in super and sub classes are together") \ 1374 range(0, 2) \ 1375 \ 1376 product(bool, CompactFields, true, \ 1377 "Allocate nonstatic fields in gaps between previous fields") \ 1378 \ 1379 notproduct(bool, PrintFieldLayout, false, \ 1380 "Print field layout for each class") \ 1381 \ 1382 /* Need to limit the extent of the padding to reasonable size. */\ 1383 /* 8K is well beyond the reasonable HW cache line size, even with */\ 1384 /* aggressive prefetching, while still leaving the room for segregating */\ 1385 /* among the distinct pages. */\ 1386 product(intx, ContendedPaddingWidth, 128, \ 1387 "How many bytes to pad the fields/classes marked @Contended with")\ 1388 range(0, 8192) \ 1389 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 1390 \ 1391 product(bool, EnableContended, true, \ 1392 "Enable @Contended annotation support") \ 1393 \ 1394 product(bool, RestrictContended, true, \ 1395 "Restrict @Contended to trusted classes") \ 1396 \ 1397 product(bool, UseBiasedLocking, true, \ 1398 "Enable biased locking in JVM") \ 1399 \ 1400 product(intx, BiasedLockingStartupDelay, 4000, \ 1401 "Number of milliseconds to wait before enabling biased locking") \ 1402 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 1403 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 1404 \ 1405 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1406 "Print statistics of biased locking in JVM") \ 1407 \ 1408 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1409 "Threshold of number of revocations per type to try to " \ 1410 "rebias all objects in the heap of that type") \ 1411 range(0, max_intx) \ 1412 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 1413 \ 1414 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1415 "Threshold of number of revocations per type to permanently " \ 1416 "revoke biases of all objects in the heap of that type") \ 1417 range(0, max_intx) \ 1418 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 1419 \ 1420 product(intx, BiasedLockingDecayTime, 25000, \ 1421 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1422 "type after previous bulk rebias") \ 1423 range(500, max_intx) \ 1424 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 1425 \ 1426 /* tracing */ \ 1427 \ 1428 develop(bool, StressRewriter, false, \ 1429 "Stress linktime bytecode rewriting") \ 1430 \ 1431 product(ccstr, TraceJVMTI, NULL, \ 1432 "Trace flags for JVMTI functions and events") \ 1433 \ 1434 /* This option can change an EMCP method into an obsolete method. */ \ 1435 /* This can affect tests that except specific methods to be EMCP. */ \ 1436 /* This option should be used with caution. */ \ 1437 product(bool, StressLdcRewrite, false, \ 1438 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1439 \ 1440 product(uintx, TraceRedefineClasses, 0, \ 1441 "Trace level for JVMTI RedefineClasses") \ 1442 range(0, 0xFFFFFFFF) \ 1443 \ 1444 /* change to false by default sometime after Mustang */ \ 1445 product(bool, VerifyMergedCPBytecodes, true, \ 1446 "Verify bytecodes after RedefineClasses constant pool merging") \ 1447 \ 1448 develop(bool, TraceJNIHandleAllocation, false, \ 1449 "Trace allocation/deallocation of JNI handle blocks") \ 1450 \ 1451 develop(bool, TraceBytecodes, false, \ 1452 "Trace bytecode execution") \ 1453 \ 1454 product(bool, TraceExceptions, false, \ 1455 "Trace exceptions") \ 1456 \ 1457 develop(bool, TraceICs, false, \ 1458 "Trace inline cache changes") \ 1459 \ 1460 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1461 "Trace method invocation counter overflow") \ 1462 \ 1463 develop(bool, TraceInlineCacheClearing, false, \ 1464 "Trace clearing of inline caches in nmethods") \ 1465 \ 1466 develop(bool, TraceDependencies, false, \ 1467 "Trace dependencies") \ 1468 \ 1469 develop(bool, VerifyDependencies, trueInDebug, \ 1470 "Exercise and verify the compilation dependency mechanism") \ 1471 \ 1472 develop(bool, TraceNewOopMapGeneration, false, \ 1473 "Trace OopMapGeneration") \ 1474 \ 1475 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1476 "Trace OopMapGeneration: print detailed cell states") \ 1477 \ 1478 develop(bool, TimeOopMap, false, \ 1479 "Time calls to GenerateOopMap::compute_map() in sum") \ 1480 \ 1481 develop(bool, TimeOopMap2, false, \ 1482 "Time calls to GenerateOopMap::compute_map() individually") \ 1483 \ 1484 develop(bool, TraceMonitorMismatch, false, \ 1485 "Trace monitor matching failures during OopMapGeneration") \ 1486 \ 1487 develop(bool, TraceOopMapRewrites, false, \ 1488 "Trace rewriting of method oops during oop map generation") \ 1489 \ 1490 develop(bool, TraceICBuffer, false, \ 1491 "Trace usage of IC buffer") \ 1492 \ 1493 develop(bool, TraceCompiledIC, false, \ 1494 "Trace changes of compiled IC") \ 1495 \ 1496 develop(bool, TraceStartupTime, false, \ 1497 "Trace setup time") \ 1498 \ 1499 develop(bool, TraceProtectionDomainVerification, false, \ 1500 "Trace protection domain verification") \ 1501 \ 1502 develop(bool, TraceClearedExceptions, false, \ 1503 "Print when an exception is forcibly cleared") \ 1504 \ 1505 product(bool, TraceClassResolution, false, \ 1506 "Trace all constant pool resolutions (for debugging)") \ 1507 \ 1508 product(bool, TraceBiasedLocking, false, \ 1509 "Trace biased locking in JVM") \ 1510 \ 1511 product(bool, TraceMonitorInflation, false, \ 1512 "Trace monitor inflation in JVM") \ 1513 \ 1514 /* gc */ \ 1515 \ 1516 product(bool, UseSerialGC, false, \ 1517 "Use the Serial garbage collector") \ 1518 \ 1519 product(bool, UseG1GC, false, \ 1520 "Use the Garbage-First garbage collector") \ 1521 \ 1522 product(bool, UseParallelGC, false, \ 1523 "Use the Parallel Scavenge garbage collector") \ 1524 \ 1525 product(bool, UseParallelOldGC, false, \ 1526 "Use the Parallel Old garbage collector") \ 1527 \ 1528 product(uintx, HeapMaximumCompactionInterval, 20, \ 1529 "How often should we maximally compact the heap (not allowing " \ 1530 "any dead space)") \ 1531 range(0, max_uintx) \ 1532 \ 1533 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1534 "The collection count for the first maximum compaction") \ 1535 range(0, max_uintx) \ 1536 \ 1537 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1538 "Use maximum compaction in the Parallel Old garbage collector " \ 1539 "for a system GC") \ 1540 \ 1541 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1542 "The mean used by the parallel compact dead wood " \ 1543 "limiter (a number between 0-100)") \ 1544 range(0, 100) \ 1545 \ 1546 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1547 "The standard deviation used by the parallel compact dead wood " \ 1548 "limiter (a number between 0-100)") \ 1549 range(0, 100) \ 1550 \ 1551 product(uint, ParallelGCThreads, 0, \ 1552 "Number of parallel threads parallel gc will use") \ 1553 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \ 1554 \ 1555 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \ 1556 "Use semaphore synchronization for the GC Threads, " \ 1557 "instead of synchronization based on mutexes") \ 1558 \ 1559 product(bool, UseDynamicNumberOfGCThreads, false, \ 1560 "Dynamically choose the number of parallel threads " \ 1561 "parallel gc will use") \ 1562 \ 1563 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1564 "Force dynamic selection of the number of " \ 1565 "parallel threads parallel gc will use to aid debugging") \ 1566 \ 1567 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1568 "Size of heap (bytes) per GC thread used in calculating the " \ 1569 "number of GC threads") \ 1570 range((size_t)os::vm_page_size(), (size_t)max_uintx) \ 1571 \ 1572 product(bool, TraceDynamicGCThreads, false, \ 1573 "Trace the dynamic GC thread usage") \ 1574 \ 1575 product(uint, ConcGCThreads, 0, \ 1576 "Number of threads concurrent gc will use") \ 1577 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \ 1578 \ 1579 product(uintx, GCTaskTimeStampEntries, 200, \ 1580 "Number of time stamp entries per gc worker thread") \ 1581 range(1, max_uintx) \ 1582 \ 1583 product(bool, AlwaysTenure, false, \ 1584 "Always tenure objects in eden (ParallelGC only)") \ 1585 \ 1586 product(bool, NeverTenure, false, \ 1587 "Never tenure objects in eden, may tenure on overflow " \ 1588 "(ParallelGC only)") \ 1589 \ 1590 product(bool, ScavengeBeforeFullGC, true, \ 1591 "Scavenge youngest generation before each full GC.") \ 1592 \ 1593 product(bool, UseConcMarkSweepGC, false, \ 1594 "Use Concurrent Mark-Sweep GC in the old generation") \ 1595 \ 1596 product(bool, ExplicitGCInvokesConcurrent, false, \ 1597 "A System.gc() request invokes a concurrent collection; " \ 1598 "(effective only when using concurrent collectors)") \ 1599 \ 1600 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1601 "A System.gc() request invokes a concurrent collection and " \ 1602 "also unloads classes during such a concurrent gc cycle " \ 1603 "(effective only when UseConcMarkSweepGC)") \ 1604 \ 1605 product(bool, GCLockerInvokesConcurrent, false, \ 1606 "The exit of a JNI critical section necessitating a scavenge, " \ 1607 "also kicks off a background concurrent collection") \ 1608 \ 1609 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1610 "How much the GC can expand the eden by while the GC locker " \ 1611 "is active (as a percentage)") \ 1612 range(0, 100) \ 1613 \ 1614 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1615 "Number of times to retry allocations when " \ 1616 "blocked by the GC locker") \ 1617 range(0, max_uintx) \ 1618 \ 1619 product(bool, UseCMSBestFit, true, \ 1620 "Use CMS best fit allocation strategy") \ 1621 \ 1622 product(bool, UseParNewGC, false, \ 1623 "Use parallel threads in the new generation") \ 1624 \ 1625 product(bool, PrintTaskqueue, false, \ 1626 "Print taskqueue statistics for parallel collectors") \ 1627 \ 1628 product(bool, PrintTerminationStats, false, \ 1629 "Print termination statistics for parallel collectors") \ 1630 \ 1631 product(uintx, ParallelGCBufferWastePct, 10, \ 1632 "Wasted fraction of parallel allocation buffer") \ 1633 range(0, 100) \ 1634 \ 1635 product(uintx, TargetPLABWastePct, 10, \ 1636 "Target wasted space in last buffer as percent of overall " \ 1637 "allocation") \ 1638 range(1, 100) \ 1639 \ 1640 product(uintx, PLABWeight, 75, \ 1641 "Percentage (0-100) used to weight the current sample when " \ 1642 "computing exponentially decaying average for ResizePLAB") \ 1643 range(0, 100) \ 1644 \ 1645 product(bool, ResizePLAB, true, \ 1646 "Dynamically resize (survivor space) promotion LAB's") \ 1647 \ 1648 product(bool, PrintPLAB, false, \ 1649 "Print (survivor space) promotion LAB's sizing decisions") \ 1650 \ 1651 product(intx, ParGCArrayScanChunk, 50, \ 1652 "Scan a subset of object array and push remainder, if array is " \ 1653 "bigger than this") \ 1654 range(1, max_intx) \ 1655 \ 1656 product(bool, ParGCUseLocalOverflow, false, \ 1657 "Instead of a global overflow list, use local overflow stacks") \ 1658 \ 1659 product(bool, ParGCTrimOverflow, true, \ 1660 "Eagerly trim the local overflow lists " \ 1661 "(when ParGCUseLocalOverflow)") \ 1662 \ 1663 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1664 "Simulate work queue overflow in ParNew") \ 1665 \ 1666 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1667 "An `interval' counter that determines how frequently " \ 1668 "we simulate overflow; a smaller number increases frequency") \ 1669 \ 1670 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1671 "The desired number of objects to claim from the overflow list") \ 1672 range(0, max_uintx) \ 1673 \ 1674 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1675 "The number of strides per worker thread that we divide up the " \ 1676 "card table scanning work into") \ 1677 range(1, max_uintx) \ 1678 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \ 1679 \ 1680 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1681 "The number of cards in each chunk of the parallel chunks used " \ 1682 "during card table scanning") \ 1683 range(1, max_intx) \ 1684 \ 1685 product(uintx, OldPLABWeight, 50, \ 1686 "Percentage (0-100) used to weight the current sample when " \ 1687 "computing exponentially decaying average for resizing " \ 1688 "OldPLABSize") \ 1689 range(0, 100) \ 1690 \ 1691 product(bool, ResizeOldPLAB, true, \ 1692 "Dynamically resize (old gen) promotion LAB's") \ 1693 \ 1694 product(bool, PrintOldPLAB, false, \ 1695 "Print (old gen) promotion LAB's sizing decisions") \ 1696 \ 1697 product(size_t, CMSOldPLABMax, 1024, \ 1698 "Maximum size of CMS gen promotion LAB caches per worker " \ 1699 "per block size") \ 1700 range(1, max_uintx) \ 1701 constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \ 1702 \ 1703 product(size_t, CMSOldPLABMin, 16, \ 1704 "Minimum size of CMS gen promotion LAB caches per worker " \ 1705 "per block size") \ 1706 range(1, max_uintx) \ 1707 constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \ 1708 \ 1709 product(uintx, CMSOldPLABNumRefills, 4, \ 1710 "Nominal number of refills of CMS gen promotion LAB cache " \ 1711 "per worker per block size") \ 1712 range(1, max_uintx) \ 1713 \ 1714 product(bool, CMSOldPLABResizeQuicker, false, \ 1715 "React on-the-fly during a scavenge to a sudden " \ 1716 "change in block demand rate") \ 1717 \ 1718 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1719 "The tolerance of the phase-change detector for on-the-fly " \ 1720 "PLAB resizing during a scavenge") \ 1721 range(1, max_uintx) \ 1722 \ 1723 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1724 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1725 "during a scavenge") \ 1726 range(1, max_uintx) \ 1727 \ 1728 product(bool, AlwaysPreTouch, false, \ 1729 "Force all freshly committed pages to be pre-touched") \ 1730 \ 1731 product_pd(size_t, CMSYoungGenPerWorker, \ 1732 "The maximum size of young gen chosen by default per GC worker " \ 1733 "thread available") \ 1734 range(1, max_uintx) \ 1735 \ 1736 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1737 "Percentage (0-100) used to add conservatism when computing the " \ 1738 "duty cycle") \ 1739 range(0, 100) \ 1740 \ 1741 product(uintx, CMSExpAvgFactor, 50, \ 1742 "Percentage (0-100) used to weight the current sample when " \ 1743 "computing exponential averages for CMS statistics") \ 1744 range(0, 100) \ 1745 \ 1746 product(uintx, CMS_FLSWeight, 75, \ 1747 "Percentage (0-100) used to weight the current sample when " \ 1748 "computing exponentially decaying averages for CMS FLS " \ 1749 "statistics") \ 1750 range(0, 100) \ 1751 \ 1752 product(uintx, CMS_FLSPadding, 1, \ 1753 "The multiple of deviation from mean to use for buffering " \ 1754 "against volatility in free list demand") \ 1755 range(0, max_juint) \ 1756 \ 1757 product(uintx, FLSCoalescePolicy, 2, \ 1758 "CMS: aggressiveness level for coalescing, increasing " \ 1759 "from 0 to 4") \ 1760 range(0, 4) \ 1761 \ 1762 product(bool, FLSAlwaysCoalesceLarge, false, \ 1763 "CMS: larger free blocks are always available for coalescing") \ 1764 \ 1765 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1766 "CMS: the smaller the percentage the greater the coalescing " \ 1767 "force") \ 1768 range(0.0, 1.0) \ 1769 \ 1770 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1771 "CMS: the factor by which to inflate estimated demand of small " \ 1772 "block sizes to prevent coalescing with an adjoining block") \ 1773 range(0.0, DBL_MAX) \ 1774 \ 1775 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1776 "CMS: the factor by which to inflate estimated demand of large " \ 1777 "block sizes to prevent coalescing with an adjoining block") \ 1778 range(0.0, DBL_MAX) \ 1779 \ 1780 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1781 "CMS: the factor by which to inflate estimated demand of small " \ 1782 "block sizes to prevent splitting to supply demand for smaller " \ 1783 "blocks") \ 1784 range(0.0, DBL_MAX) \ 1785 \ 1786 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1787 "CMS: the factor by which to inflate estimated demand of large " \ 1788 "block sizes to prevent splitting to supply demand for smaller " \ 1789 "blocks") \ 1790 range(0.0, DBL_MAX) \ 1791 \ 1792 product(bool, CMSExtrapolateSweep, false, \ 1793 "CMS: cushion for block demand during sweep") \ 1794 \ 1795 product(uintx, CMS_SweepWeight, 75, \ 1796 "Percentage (0-100) used to weight the current sample when " \ 1797 "computing exponentially decaying average for inter-sweep " \ 1798 "duration") \ 1799 range(0, 100) \ 1800 \ 1801 product(uintx, CMS_SweepPadding, 1, \ 1802 "The multiple of deviation from mean to use for buffering " \ 1803 "against volatility in inter-sweep duration") \ 1804 range(0, max_juint) \ 1805 \ 1806 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1807 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1808 "duration exceeds this threshold in milliseconds") \ 1809 range(0, max_uintx) \ 1810 \ 1811 product(bool, CMSClassUnloadingEnabled, true, \ 1812 "Whether class unloading enabled when using CMS GC") \ 1813 \ 1814 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1815 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1816 "count for which classes may not be unloaded") \ 1817 range(0, max_uintx) \ 1818 \ 1819 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1820 "Replenish an indexed free list with this number of chunks") \ 1821 range(1, max_uintx) \ 1822 \ 1823 product(bool, CMSReplenishIntermediate, true, \ 1824 "Replenish all intermediate free-list caches") \ 1825 \ 1826 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1827 "When satisfying batched demand, split blocks from the " \ 1828 "IndexedFreeList whose size is a multiple of requested size") \ 1829 \ 1830 product(bool, CMSLoopWarn, false, \ 1831 "Warn in case of excessive CMS looping") \ 1832 \ 1833 /* where does the range max value of (max_jint - 1) come from? */ \ 1834 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1835 "Maximum size of marking stack") \ 1836 range(1, (max_jint - 1)) \ 1837 \ 1838 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1839 "Size of marking stack") \ 1840 constraint(MarkStackSizeConstraintFunc,AfterErgo) \ 1841 \ 1842 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1843 "Simulate frequent marking stack / work queue overflow") \ 1844 \ 1845 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1846 "An \"interval\" counter that determines how frequently " \ 1847 "to simulate overflow; a smaller number increases frequency") \ 1848 \ 1849 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1850 "Maximum number of abortable preclean iterations, if > 0") \ 1851 range(0, max_uintx) \ 1852 \ 1853 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1854 "Maximum time in abortable preclean (in milliseconds)") \ 1855 range(0, max_intx) \ 1856 \ 1857 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1858 "Nominal minimum work per abortable preclean iteration") \ 1859 range(0, max_uintx) \ 1860 \ 1861 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1862 "Time that we sleep between iterations when not given " \ 1863 "enough work per iteration") \ 1864 range(0, max_intx) \ 1865 \ 1866 product(size_t, CMSRescanMultiple, 32, \ 1867 "Size (in cards) of CMS parallel rescan task") \ 1868 range(1, max_uintx) \ 1869 \ 1870 product(size_t, CMSConcMarkMultiple, 32, \ 1871 "Size (in cards) of CMS concurrent MT marking task") \ 1872 range(1, max_uintx) \ 1873 \ 1874 product(bool, CMSAbortSemantics, false, \ 1875 "Whether abort-on-overflow semantics is implemented") \ 1876 \ 1877 product(bool, CMSParallelInitialMarkEnabled, true, \ 1878 "Use the parallel initial mark.") \ 1879 \ 1880 product(bool, CMSParallelRemarkEnabled, true, \ 1881 "Whether parallel remark enabled (only if ParNewGC)") \ 1882 \ 1883 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1884 "Whether parallel remark of survivor space " \ 1885 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1886 \ 1887 product(bool, CMSPLABRecordAlways, true, \ 1888 "Always record survivor space PLAB boundaries (effective only " \ 1889 "if CMSParallelSurvivorRemarkEnabled)") \ 1890 \ 1891 product(bool, CMSEdenChunksRecordAlways, true, \ 1892 "Always record eden chunks used for the parallel initial mark " \ 1893 "or remark of eden") \ 1894 \ 1895 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1896 "Print the eden and the survivor chunks used for the parallel " \ 1897 "initial mark or remark of the eden/survivor spaces") \ 1898 \ 1899 product(bool, CMSConcurrentMTEnabled, true, \ 1900 "Whether multi-threaded concurrent work enabled " \ 1901 "(effective only if ParNewGC)") \ 1902 \ 1903 product(bool, CMSPrecleaningEnabled, true, \ 1904 "Whether concurrent precleaning enabled") \ 1905 \ 1906 product(uintx, CMSPrecleanIter, 3, \ 1907 "Maximum number of precleaning iteration passes") \ 1908 range(0, 9) \ 1909 \ 1910 product(uintx, CMSPrecleanDenominator, 3, \ 1911 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1912 "ratio") \ 1913 range(1, max_uintx) \ 1914 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \ 1915 \ 1916 product(uintx, CMSPrecleanNumerator, 2, \ 1917 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1918 "ratio") \ 1919 range(0, max_uintx-1) \ 1920 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \ 1921 \ 1922 product(bool, CMSPrecleanRefLists1, true, \ 1923 "Preclean ref lists during (initial) preclean phase") \ 1924 \ 1925 product(bool, CMSPrecleanRefLists2, false, \ 1926 "Preclean ref lists during abortable preclean phase") \ 1927 \ 1928 product(bool, CMSPrecleanSurvivors1, false, \ 1929 "Preclean survivors during (initial) preclean phase") \ 1930 \ 1931 product(bool, CMSPrecleanSurvivors2, true, \ 1932 "Preclean survivors during abortable preclean phase") \ 1933 \ 1934 product(uintx, CMSPrecleanThreshold, 1000, \ 1935 "Do not iterate again if number of dirty cards is less than this")\ 1936 range(100, max_uintx) \ 1937 \ 1938 product(bool, CMSCleanOnEnter, true, \ 1939 "Clean-on-enter optimization for reducing number of dirty cards") \ 1940 \ 1941 product(uintx, CMSRemarkVerifyVariant, 1, \ 1942 "Choose variant (1,2) of verification following remark") \ 1943 range(1, 2) \ 1944 \ 1945 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1946 "If Eden size is below this, do not try to schedule remark") \ 1947 range(0, max_uintx) \ 1948 \ 1949 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1950 "The Eden occupancy percentage (0-100) at which " \ 1951 "to try and schedule remark pause") \ 1952 range(0, 100) \ 1953 \ 1954 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1955 "Start sampling eden top at least before young gen " \ 1956 "occupancy reaches 1/<ratio> of the size at which " \ 1957 "we plan to schedule remark") \ 1958 range(1, max_uintx) \ 1959 \ 1960 product(uintx, CMSSamplingGrain, 16*K, \ 1961 "The minimum distance between eden samples for CMS (see above)") \ 1962 range(1, max_uintx) \ 1963 \ 1964 product(bool, CMSScavengeBeforeRemark, false, \ 1965 "Attempt scavenge before the CMS remark step") \ 1966 \ 1967 develop(bool, CMSTraceSweeper, false, \ 1968 "Trace some actions of the CMS sweeper") \ 1969 \ 1970 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1971 "Don't drain below this size per parallel worker/thief") \ 1972 range(1, max_juint) \ 1973 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \ 1974 \ 1975 manageable(intx, CMSWaitDuration, 2000, \ 1976 "Time in milliseconds that CMS thread waits for young GC") \ 1977 range(min_jint, max_jint) \ 1978 \ 1979 develop(uintx, CMSCheckInterval, 1000, \ 1980 "Interval in milliseconds that CMS thread checks if it " \ 1981 "should start a collection cycle") \ 1982 \ 1983 product(bool, CMSYield, true, \ 1984 "Yield between steps of CMS") \ 1985 \ 1986 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1987 "Bitmap operations should process at most this many bits " \ 1988 "between yields") \ 1989 range(1, max_uintx) \ 1990 \ 1991 product(bool, CMSDumpAtPromotionFailure, false, \ 1992 "Dump useful information about the state of the CMS old " \ 1993 "generation upon a promotion failure") \ 1994 \ 1995 product(bool, CMSPrintChunksInDump, false, \ 1996 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1997 "more detailed information about the free chunks") \ 1998 \ 1999 product(bool, CMSPrintObjectsInDump, false, \ 2000 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 2001 "more detailed information about the allocated objects") \ 2002 \ 2003 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 2004 "Verify that all references across the FLS boundary " \ 2005 "are to valid objects") \ 2006 \ 2007 diagnostic(bool, FLSVerifyLists, false, \ 2008 "Do lots of (expensive) FreeListSpace verification") \ 2009 \ 2010 diagnostic(bool, FLSVerifyIndexTable, false, \ 2011 "Do lots of (expensive) FLS index table verification") \ 2012 \ 2013 develop(bool, FLSVerifyDictionary, false, \ 2014 "Do lots of (expensive) FLS dictionary verification") \ 2015 \ 2016 develop(bool, VerifyBlockOffsetArray, false, \ 2017 "Do (expensive) block offset array verification") \ 2018 \ 2019 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 2020 "Maintain _unallocated_block in BlockOffsetArray " \ 2021 "(currently applicable only to CMS collector)") \ 2022 \ 2023 develop(bool, TraceCMSState, false, \ 2024 "Trace the state of the CMS collection") \ 2025 \ 2026 product(intx, RefDiscoveryPolicy, 0, \ 2027 "Select type of reference discovery policy: " \ 2028 "reference-based(0) or referent-based(1)") \ 2029 range(ReferenceProcessor::DiscoveryPolicyMin, \ 2030 ReferenceProcessor::DiscoveryPolicyMax) \ 2031 \ 2032 product(bool, ParallelRefProcEnabled, false, \ 2033 "Enable parallel reference processing whenever possible") \ 2034 \ 2035 product(bool, ParallelRefProcBalancingEnabled, true, \ 2036 "Enable balancing of reference processing queues") \ 2037 \ 2038 product(uintx, CMSTriggerRatio, 80, \ 2039 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 2040 "allocated before a CMS collection cycle commences") \ 2041 range(0, 100) \ 2042 \ 2043 product(uintx, CMSBootstrapOccupancy, 50, \ 2044 "Percentage CMS generation occupancy at which to " \ 2045 "initiate CMS collection for bootstrapping collection stats") \ 2046 range(0, 100) \ 2047 \ 2048 product(intx, CMSInitiatingOccupancyFraction, -1, \ 2049 "Percentage CMS generation occupancy to start a CMS collection " \ 2050 "cycle. A negative value means that CMSTriggerRatio is used") \ 2051 range(min_intx, 100) \ 2052 \ 2053 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 2054 "Percentage of the (entire) heap occupancy to start a " \ 2055 "concurrent GC cycle. It is used by GCs that trigger a " \ 2056 "concurrent GC cycle based on the occupancy of the entire heap, " \ 2057 "not just one of the generations (e.g., G1). A value of 0 " \ 2058 "denotes 'do constant GC cycles'.") \ 2059 range(0, 100) \ 2060 \ 2061 manageable(intx, CMSTriggerInterval, -1, \ 2062 "Commence a CMS collection cycle (at least) every so many " \ 2063 "milliseconds (0 permanently, -1 disabled)") \ 2064 range(-1, max_intx) \ 2065 \ 2066 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2067 "Only use occupancy as a criterion for starting a CMS collection")\ 2068 \ 2069 product(uintx, CMSIsTooFullPercentage, 98, \ 2070 "An absolute ceiling above which CMS will always consider the " \ 2071 "unloading of classes when class unloading is enabled") \ 2072 range(0, 100) \ 2073 \ 2074 develop(bool, CMSTestInFreeList, false, \ 2075 "Check if the coalesced range is already in the " \ 2076 "free lists as claimed") \ 2077 \ 2078 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2079 "Check that all the garbage collected was returned to the " \ 2080 "free lists") \ 2081 \ 2082 notproduct(bool, ScavengeALot, false, \ 2083 "Force scavenge at every Nth exit from the runtime system " \ 2084 "(N=ScavengeALotInterval)") \ 2085 \ 2086 develop(bool, FullGCALot, false, \ 2087 "Force full gc at every Nth exit from the runtime system " \ 2088 "(N=FullGCALotInterval)") \ 2089 \ 2090 notproduct(bool, GCALotAtAllSafepoints, false, \ 2091 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2092 \ 2093 product(bool, PrintPromotionFailure, false, \ 2094 "Print additional diagnostic information following " \ 2095 "promotion failure") \ 2096 \ 2097 notproduct(bool, PromotionFailureALot, false, \ 2098 "Use promotion failure handling on every youngest generation " \ 2099 "collection") \ 2100 \ 2101 develop(uintx, PromotionFailureALotCount, 1000, \ 2102 "Number of promotion failures occurring at PLAB " \ 2103 "refill attempts (ParNew) or promotion attempts " \ 2104 "(other young collectors)") \ 2105 \ 2106 develop(uintx, PromotionFailureALotInterval, 5, \ 2107 "Total collections between promotion failures a lot") \ 2108 \ 2109 experimental(uintx, WorkStealingSleepMillis, 1, \ 2110 "Sleep time when sleep is used for yields") \ 2111 \ 2112 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2113 "Number of yields before a sleep is done during work stealing") \ 2114 \ 2115 experimental(uintx, WorkStealingHardSpins, 4096, \ 2116 "Number of iterations in a spin loop between checks on " \ 2117 "time out of hard spin") \ 2118 \ 2119 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2120 "Ratio of hard spins to calls to yield") \ 2121 \ 2122 develop(uintx, ObjArrayMarkingStride, 512, \ 2123 "Number of object array elements to push onto the marking stack " \ 2124 "before pushing a continuation entry") \ 2125 \ 2126 develop(bool, MetadataAllocationFailALot, false, \ 2127 "Fail metadata allocations at intervals controlled by " \ 2128 "MetadataAllocationFailALotInterval") \ 2129 \ 2130 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2131 "Metadata allocation failure a lot interval") \ 2132 \ 2133 develop(bool, TraceMetadataChunkAllocation, false, \ 2134 "Trace chunk metadata allocations") \ 2135 \ 2136 product(bool, TraceMetadataHumongousAllocation, false, \ 2137 "Trace humongous metadata allocations") \ 2138 \ 2139 develop(bool, TraceMetavirtualspaceAllocation, false, \ 2140 "Trace virtual space metadata allocations") \ 2141 \ 2142 notproduct(bool, ExecuteInternalVMTests, false, \ 2143 "Enable execution of internal VM tests") \ 2144 \ 2145 notproduct(bool, VerboseInternalVMTests, false, \ 2146 "Turn on logging for internal VM tests.") \ 2147 \ 2148 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2149 \ 2150 product_pd(bool, ResizeTLAB, \ 2151 "Dynamically resize TLAB size for threads") \ 2152 \ 2153 product(bool, ZeroTLAB, false, \ 2154 "Zero out the newly created TLAB") \ 2155 \ 2156 product(bool, FastTLABRefill, true, \ 2157 "Use fast TLAB refill code") \ 2158 \ 2159 product(bool, PrintTLAB, false, \ 2160 "Print various TLAB related information") \ 2161 \ 2162 product(bool, TLABStats, true, \ 2163 "Provide more detailed and expensive TLAB statistics " \ 2164 "(with PrintTLAB)") \ 2165 \ 2166 product_pd(bool, NeverActAsServerClassMachine, \ 2167 "Never act like a server-class machine") \ 2168 \ 2169 product(bool, AlwaysActAsServerClassMachine, false, \ 2170 "Always act like a server-class machine") \ 2171 \ 2172 product_pd(uint64_t, MaxRAM, \ 2173 "Real memory size (in bytes) used to set maximum heap size") \ 2174 range(0, 0XFFFFFFFFFFFFFFFF) \ 2175 \ 2176 product(size_t, ErgoHeapSizeLimit, 0, \ 2177 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2178 "MaxRAM / MaxRAMFraction") \ 2179 range(0, max_uintx) \ 2180 \ 2181 product(uintx, MaxRAMFraction, 4, \ 2182 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2183 "size") \ 2184 range(1, max_uintx) \ 2185 \ 2186 product(uintx, MinRAMFraction, 2, \ 2187 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2188 "size on systems with small physical memory size") \ 2189 range(1, max_uintx) \ 2190 \ 2191 product(uintx, InitialRAMFraction, 64, \ 2192 "Fraction (1/n) of real memory used for initial heap size") \ 2193 range(1, max_uintx) \ 2194 \ 2195 develop(uintx, MaxVirtMemFraction, 2, \ 2196 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2197 "determining maximum heap size") \ 2198 \ 2199 product(bool, UseAutoGCSelectPolicy, false, \ 2200 "Use automatic collection selection policy") \ 2201 \ 2202 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2203 "Automatic GC selection pause threshold in milliseconds") \ 2204 range(0, max_uintx) \ 2205 \ 2206 product(bool, UseAdaptiveSizePolicy, true, \ 2207 "Use adaptive generation sizing policies") \ 2208 \ 2209 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2210 "Use adaptive survivor sizing policies") \ 2211 \ 2212 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2213 "Use adaptive young-old sizing policies at minor collections") \ 2214 \ 2215 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2216 "Use adaptive young-old sizing policies at major collections") \ 2217 \ 2218 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2219 "Include statistics from System.gc() for adaptive size policy") \ 2220 \ 2221 product(bool, UseAdaptiveGCBoundary, false, \ 2222 "Allow young-old boundary to move") \ 2223 \ 2224 develop(bool, TraceAdaptiveGCBoundary, false, \ 2225 "Trace young-old boundary moves") \ 2226 \ 2227 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2228 "Resize the virtual spaces of the young or old generations") \ 2229 range(-1, 1) \ 2230 \ 2231 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2232 "Policy for changing generation size for throughput goals") \ 2233 range(0, 1) \ 2234 \ 2235 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2236 "Number of steps where heuristics is used before data is used") \ 2237 range(0, max_uintx) \ 2238 \ 2239 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2240 "Number of collections before the adaptive sizing is started") \ 2241 \ 2242 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2243 "Collection interval for printing information; zero means never") \ 2244 range(0, max_uintx) \ 2245 \ 2246 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2247 "Use adaptive minimum footprint as a goal") \ 2248 \ 2249 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2250 "Weight given to exponential resizing, between 0 and 100") \ 2251 range(0, 100) \ 2252 \ 2253 product(uintx, AdaptiveTimeWeight, 25, \ 2254 "Weight given to time in adaptive policy, between 0 and 100") \ 2255 range(0, 100) \ 2256 \ 2257 product(uintx, PausePadding, 1, \ 2258 "How much buffer to keep for pause time") \ 2259 range(0, max_juint) \ 2260 \ 2261 product(uintx, PromotedPadding, 3, \ 2262 "How much buffer to keep for promotion failure") \ 2263 range(0, max_juint) \ 2264 \ 2265 product(uintx, SurvivorPadding, 3, \ 2266 "How much buffer to keep for survivor overflow") \ 2267 range(0, max_juint) \ 2268 \ 2269 product(uintx, ThresholdTolerance, 10, \ 2270 "Allowed collection cost difference between generations") \ 2271 range(0, 100) \ 2272 \ 2273 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2274 "If collection costs are within margin, reduce both by full " \ 2275 "delta") \ 2276 range(0, 100) \ 2277 \ 2278 product(uintx, YoungGenerationSizeIncrement, 20, \ 2279 "Adaptive size percentage change in young generation") \ 2280 range(0, 100) \ 2281 \ 2282 product(uintx, YoungGenerationSizeSupplement, 80, \ 2283 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2284 range(0, 100) \ 2285 \ 2286 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2287 "Decay factor to YoungedGenerationSizeSupplement") \ 2288 range(1, max_uintx) \ 2289 \ 2290 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2291 "Adaptive size percentage change in tenured generation") \ 2292 range(0, 100) \ 2293 \ 2294 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2295 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2296 range(0, 100) \ 2297 \ 2298 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2299 "Decay factor to TenuredGenerationSizeIncrement") \ 2300 range(1, max_uintx) \ 2301 \ 2302 product(uintx, MaxGCPauseMillis, max_uintx, \ 2303 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2304 "or (G1 Only) the maximum GC time per MMU time slice") \ 2305 range(1, max_uintx) \ 2306 constraint(MaxGCPauseMillisConstraintFunc,AfterMemoryInit) \ 2307 \ 2308 product(uintx, GCPauseIntervalMillis, 0, \ 2309 "Time slice for MMU specification") \ 2310 constraint(GCPauseIntervalMillisConstraintFunc,AfterMemoryInit) \ 2311 \ 2312 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2313 "Adaptive size policy maximum GC minor pause time goal " \ 2314 "in millisecond") \ 2315 range(0, max_uintx) \ 2316 \ 2317 product(uintx, GCTimeRatio, 99, \ 2318 "Adaptive size policy application time to GC time ratio") \ 2319 range(0, max_juint) \ 2320 \ 2321 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2322 "Adaptive size scale down factor for shrinking") \ 2323 range(1, max_uintx) \ 2324 \ 2325 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2326 "Adaptive size decays the major cost for long major intervals") \ 2327 \ 2328 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2329 "Time scale over which major costs decay") \ 2330 range(0, max_uintx) \ 2331 \ 2332 product(uintx, MinSurvivorRatio, 3, \ 2333 "Minimum ratio of young generation/survivor space size") \ 2334 range(3, max_uintx) \ 2335 \ 2336 product(uintx, InitialSurvivorRatio, 8, \ 2337 "Initial ratio of young generation/survivor space size") \ 2338 range(0, max_uintx) \ 2339 \ 2340 product(size_t, BaseFootPrintEstimate, 256*M, \ 2341 "Estimate of footprint other than Java Heap") \ 2342 range(0, max_uintx) \ 2343 \ 2344 product(bool, UseGCOverheadLimit, true, \ 2345 "Use policy to limit of proportion of time spent in GC " \ 2346 "before an OutOfMemory error is thrown") \ 2347 \ 2348 product(uintx, GCTimeLimit, 98, \ 2349 "Limit of the proportion of time spent in GC before " \ 2350 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2351 range(0, 100) \ 2352 \ 2353 product(uintx, GCHeapFreeLimit, 2, \ 2354 "Minimum percentage of free space after a full GC before an " \ 2355 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2356 range(0, 100) \ 2357 \ 2358 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2359 "Number of consecutive collections before gc time limit fires") \ 2360 range(1, max_uintx) \ 2361 \ 2362 product(bool, PrintAdaptiveSizePolicy, false, \ 2363 "Print information about AdaptiveSizePolicy") \ 2364 \ 2365 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2366 "How far ahead to prefetch destination area (<= 0 means off)") \ 2367 range(-1, max_jint) \ 2368 \ 2369 product(intx, PrefetchScanIntervalInBytes, -1, \ 2370 "How far ahead to prefetch scan area (<= 0 means off)") \ 2371 range(-1, max_jint) \ 2372 \ 2373 product(intx, PrefetchFieldsAhead, -1, \ 2374 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2375 range(-1, max_jint) \ 2376 \ 2377 diagnostic(bool, VerifySilently, false, \ 2378 "Do not print the verification progress") \ 2379 \ 2380 diagnostic(bool, VerifyDuringStartup, false, \ 2381 "Verify memory system before executing any Java code " \ 2382 "during VM initialization") \ 2383 \ 2384 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2385 "Verify system before exiting") \ 2386 \ 2387 diagnostic(bool, VerifyBeforeGC, false, \ 2388 "Verify memory system before GC") \ 2389 \ 2390 diagnostic(bool, VerifyAfterGC, false, \ 2391 "Verify memory system after GC") \ 2392 \ 2393 diagnostic(bool, VerifyDuringGC, false, \ 2394 "Verify memory system during GC (between phases)") \ 2395 \ 2396 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2397 "Enable parallel memory system verification") \ 2398 \ 2399 diagnostic(bool, DeferInitialCardMark, false, \ 2400 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2401 "may arise from new_pre_store_barrier") \ 2402 \ 2403 product(bool, UseCondCardMark, false, \ 2404 "Check for already marked card before updating card table") \ 2405 \ 2406 diagnostic(bool, VerifyRememberedSets, false, \ 2407 "Verify GC remembered sets") \ 2408 \ 2409 diagnostic(bool, VerifyObjectStartArray, true, \ 2410 "Verify GC object start array if verify before/after") \ 2411 \ 2412 product(bool, DisableExplicitGC, false, \ 2413 "Ignore calls to System.gc()") \ 2414 \ 2415 notproduct(bool, CheckMemoryInitialization, false, \ 2416 "Check memory initialization") \ 2417 \ 2418 diagnostic(bool, BindCMSThreadToCPU, false, \ 2419 "Bind CMS Thread to CPU if possible") \ 2420 \ 2421 diagnostic(uintx, CPUForCMSThread, 0, \ 2422 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2423 range(0, max_juint) \ 2424 \ 2425 product(bool, BindGCTaskThreadsToCPUs, false, \ 2426 "Bind GCTaskThreads to CPUs if possible") \ 2427 \ 2428 product(bool, UseGCTaskAffinity, false, \ 2429 "Use worker affinity when asking for GCTasks") \ 2430 \ 2431 product(uintx, ProcessDistributionStride, 4, \ 2432 "Stride through processors when distributing processes") \ 2433 range(0, max_juint) \ 2434 \ 2435 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2436 "Number of times the coordinator GC thread will sleep while " \ 2437 "yielding before giving up and resuming GC") \ 2438 range(0, max_juint) \ 2439 \ 2440 product(uintx, CMSYieldSleepCount, 0, \ 2441 "Number of times a GC thread (minus the coordinator) " \ 2442 "will sleep while yielding before giving up and resuming GC") \ 2443 range(0, max_juint) \ 2444 \ 2445 /* gc tracing */ \ 2446 manageable(bool, PrintGC, false, \ 2447 "Print message at garbage collection") \ 2448 \ 2449 manageable(bool, PrintGCDetails, false, \ 2450 "Print more details at garbage collection") \ 2451 \ 2452 manageable(bool, PrintGCDateStamps, false, \ 2453 "Print date stamps at garbage collection") \ 2454 \ 2455 manageable(bool, PrintGCTimeStamps, false, \ 2456 "Print timestamps at garbage collection") \ 2457 \ 2458 manageable(bool, PrintGCID, true, \ 2459 "Print an identifier for each garbage collection") \ 2460 \ 2461 product(bool, PrintGCTaskTimeStamps, false, \ 2462 "Print timestamps for individual gc worker thread tasks") \ 2463 \ 2464 develop(intx, ConcGCYieldTimeout, 0, \ 2465 "If non-zero, assert that GC threads yield within this " \ 2466 "number of milliseconds") \ 2467 range(0, max_intx) \ 2468 \ 2469 product(bool, PrintReferenceGC, false, \ 2470 "Print times spent handling reference objects during GC " \ 2471 "(enabled only when PrintGCDetails)") \ 2472 \ 2473 develop(bool, TraceReferenceGC, false, \ 2474 "Trace handling of soft/weak/final/phantom references") \ 2475 \ 2476 develop(bool, TraceFinalizerRegistration, false, \ 2477 "Trace registration of final references") \ 2478 \ 2479 notproduct(bool, TraceScavenge, false, \ 2480 "Trace scavenge") \ 2481 \ 2482 product(bool, IgnoreEmptyClassPaths, false, \ 2483 "Ignore empty path elements in -classpath") \ 2484 \ 2485 product(bool, TraceClassPaths, false, \ 2486 "Trace processing of class paths") \ 2487 \ 2488 product_rw(bool, TraceClassLoading, false, \ 2489 "Trace all classes loaded") \ 2490 \ 2491 product(bool, TraceClassLoadingPreorder, false, \ 2492 "Trace all classes loaded in order referenced (not loaded)") \ 2493 \ 2494 product_rw(bool, TraceClassUnloading, false, \ 2495 "Trace unloading of classes") \ 2496 \ 2497 product_rw(bool, TraceLoaderConstraints, false, \ 2498 "Trace loader constraints") \ 2499 \ 2500 develop(bool, TraceClassLoaderData, false, \ 2501 "Trace class loader loader_data lifetime") \ 2502 \ 2503 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2504 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2505 "Initial size of the boot class loader data metaspace") \ 2506 range(30*K, max_uintx/BytesPerWord) \ 2507 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 2508 \ 2509 product(bool, TraceYoungGenTime, false, \ 2510 "Trace accumulated time for young collection") \ 2511 \ 2512 product(bool, TraceOldGenTime, false, \ 2513 "Trace accumulated time for old collection") \ 2514 \ 2515 product(bool, PrintTenuringDistribution, false, \ 2516 "Print tenuring age information") \ 2517 \ 2518 product_rw(bool, PrintHeapAtGC, false, \ 2519 "Print heap layout before and after each GC") \ 2520 \ 2521 product_rw(bool, PrintHeapAtGCExtended, false, \ 2522 "Print extended information about the layout of the heap " \ 2523 "when -XX:+PrintHeapAtGC is set") \ 2524 \ 2525 product(bool, PrintHeapAtSIGBREAK, true, \ 2526 "Print heap layout in response to SIGBREAK") \ 2527 \ 2528 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2529 "Print a class histogram before any major stop-world GC") \ 2530 \ 2531 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2532 "Print a class histogram after any major stop-world GC") \ 2533 \ 2534 manageable(bool, PrintClassHistogram, false, \ 2535 "Print a histogram of class instances") \ 2536 \ 2537 develop(bool, TraceWorkGang, false, \ 2538 "Trace activities of work gangs") \ 2539 \ 2540 develop(bool, TraceBlockOffsetTable, false, \ 2541 "Print BlockOffsetTable maps") \ 2542 \ 2543 develop(bool, TraceCardTableModRefBS, false, \ 2544 "Print CardTableModRefBS maps") \ 2545 \ 2546 develop(bool, TraceGCTaskManager, false, \ 2547 "Trace actions of the GC task manager") \ 2548 \ 2549 develop(bool, TraceGCTaskQueue, false, \ 2550 "Trace actions of the GC task queues") \ 2551 \ 2552 diagnostic(bool, TraceGCTaskThread, false, \ 2553 "Trace actions of the GC task threads") \ 2554 \ 2555 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2556 "Print the time taken by each phase in ParallelOldGC " \ 2557 "(PrintGCDetails must also be enabled)") \ 2558 \ 2559 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2560 "Trace marking phase in ParallelOldGC") \ 2561 \ 2562 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2563 "Trace summary phase in ParallelOldGC") \ 2564 \ 2565 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2566 "Trace compaction phase in ParallelOldGC") \ 2567 \ 2568 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2569 "Trace dense prefix computation for ParallelOldGC") \ 2570 \ 2571 develop(bool, IgnoreLibthreadGPFault, false, \ 2572 "Suppress workaround for libthread GP fault") \ 2573 \ 2574 product(bool, PrintJNIGCStalls, false, \ 2575 "Print diagnostic message when GC is stalled " \ 2576 "by JNI critical section") \ 2577 \ 2578 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2579 "The percentage of the used heap that the instances of a class " \ 2580 "must occupy for the class to generate a trace event") \ 2581 range(0.0, 100.0) \ 2582 \ 2583 /* GC log rotation setting */ \ 2584 \ 2585 product(bool, UseGCLogFileRotation, false, \ 2586 "Rotate gclog files (for long running applications). It requires "\ 2587 "-Xloggc:<filename>") \ 2588 \ 2589 product(uintx, NumberOfGCLogFiles, 0, \ 2590 "Number of gclog files in rotation " \ 2591 "(default: 0, no rotation)") \ 2592 range(0, max_uintx) \ 2593 \ 2594 product(size_t, GCLogFileSize, 8*K, \ 2595 "GC log file size, requires UseGCLogFileRotation. " \ 2596 "Set to 0 to only trigger rotation via jcmd") \ 2597 range(0, max_uintx) \ 2598 \ 2599 /* JVMTI heap profiling */ \ 2600 \ 2601 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2602 "Trace JVMTI object tagging calls") \ 2603 \ 2604 diagnostic(bool, VerifyBeforeIteration, false, \ 2605 "Verify memory system before JVMTI iteration") \ 2606 \ 2607 /* compiler interface */ \ 2608 \ 2609 develop(bool, CIPrintCompilerName, false, \ 2610 "when CIPrint is active, print the name of the active compiler") \ 2611 \ 2612 diagnostic(bool, CIPrintCompileQueue, false, \ 2613 "display the contents of the compile queue whenever a " \ 2614 "compilation is enqueued") \ 2615 \ 2616 develop(bool, CIPrintRequests, false, \ 2617 "display every request for compilation") \ 2618 \ 2619 product(bool, CITime, false, \ 2620 "collect timing information for compilation") \ 2621 \ 2622 develop(bool, CITimeVerbose, false, \ 2623 "be more verbose in compilation timings") \ 2624 \ 2625 develop(bool, CITimeEach, false, \ 2626 "display timing information after each successful compilation") \ 2627 \ 2628 develop(bool, CICountOSR, false, \ 2629 "use a separate counter when assigning ids to osr compilations") \ 2630 \ 2631 develop(bool, CICompileNatives, true, \ 2632 "compile native methods if supported by the compiler") \ 2633 \ 2634 develop_pd(bool, CICompileOSR, \ 2635 "compile on stack replacement methods if supported by the " \ 2636 "compiler") \ 2637 \ 2638 develop(bool, CIPrintMethodCodes, false, \ 2639 "print method bytecodes of the compiled code") \ 2640 \ 2641 develop(bool, CIPrintTypeFlow, false, \ 2642 "print the results of ciTypeFlow analysis") \ 2643 \ 2644 develop(bool, CITraceTypeFlow, false, \ 2645 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2646 \ 2647 develop(intx, OSROnlyBCI, -1, \ 2648 "OSR only at this bci. Negative values mean exclude that bci") \ 2649 \ 2650 /* compiler */ \ 2651 \ 2652 /* notice: the max range value here is max_jint, not max_intx */ \ 2653 /* because of overflow issue */ \ 2654 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2655 "Number of compiler threads to run") \ 2656 range(0, max_jint) \ 2657 constraint(CICompilerCountConstraintFunc, AtParse) \ 2658 \ 2659 product(intx, CompilationPolicyChoice, 0, \ 2660 "which compilation policy (0-3)") \ 2661 range(0, 3) \ 2662 \ 2663 develop(bool, UseStackBanging, true, \ 2664 "use stack banging for stack overflow checks (required for " \ 2665 "proper StackOverflow handling; disable only to measure cost " \ 2666 "of stackbanging)") \ 2667 \ 2668 develop(bool, UseStrictFP, true, \ 2669 "use strict fp if modifier strictfp is set") \ 2670 \ 2671 develop(bool, GenerateSynchronizationCode, true, \ 2672 "generate locking/unlocking code for synchronized methods and " \ 2673 "monitors") \ 2674 \ 2675 develop(bool, GenerateCompilerNullChecks, true, \ 2676 "Generate explicit null checks for loads/stores/calls") \ 2677 \ 2678 develop(bool, GenerateRangeChecks, true, \ 2679 "Generate range checks for array accesses") \ 2680 \ 2681 develop_pd(bool, ImplicitNullChecks, \ 2682 "Generate code for implicit null checks") \ 2683 \ 2684 product_pd(bool, TrapBasedNullChecks, \ 2685 "Generate code for null checks that uses a cmp and trap " \ 2686 "instruction raising SIGTRAP. This is only used if an access to" \ 2687 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2688 "ImplicitNullChecks don't work (PPC64).") \ 2689 \ 2690 product(bool, PrintSafepointStatistics, false, \ 2691 "Print statistics about safepoint synchronization") \ 2692 \ 2693 product(intx, PrintSafepointStatisticsCount, 300, \ 2694 "Total number of safepoint statistics collected " \ 2695 "before printing them out") \ 2696 range(1, max_intx) \ 2697 \ 2698 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2699 "Print safepoint statistics only when safepoint takes " \ 2700 "more than PrintSafepointSatisticsTimeout in millis") \ 2701 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 2702 NOT_LP64(range(-1, max_intx)) \ 2703 \ 2704 product(bool, TraceSafepointCleanupTime, false, \ 2705 "Print the break down of clean up tasks performed during " \ 2706 "safepoint") \ 2707 \ 2708 product(bool, Inline, true, \ 2709 "Enable inlining") \ 2710 \ 2711 product(bool, ClipInlining, true, \ 2712 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2713 \ 2714 develop(bool, UseCHA, true, \ 2715 "Enable CHA") \ 2716 \ 2717 product(bool, UseTypeProfile, true, \ 2718 "Check interpreter profile for historically monomorphic calls") \ 2719 \ 2720 diagnostic(bool, PrintInlining, false, \ 2721 "Print inlining optimizations") \ 2722 \ 2723 product(bool, UsePopCountInstruction, false, \ 2724 "Use population count instruction") \ 2725 \ 2726 develop(bool, EagerInitialization, false, \ 2727 "Eagerly initialize classes if possible") \ 2728 \ 2729 diagnostic(bool, LogTouchedMethods, false, \ 2730 "Log methods which have been ever touched in runtime") \ 2731 \ 2732 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 2733 "Print all methods that have been ever touched in runtime") \ 2734 \ 2735 develop(bool, TraceMethodReplacement, false, \ 2736 "Print when methods are replaced do to recompilation") \ 2737 \ 2738 develop(bool, PrintMethodFlushing, false, \ 2739 "Print the nmethods being flushed") \ 2740 \ 2741 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2742 "print statistics about method flushing") \ 2743 \ 2744 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2745 "Number of compiled code invocations after which " \ 2746 "the method is considered as hot by the flusher") \ 2747 range(1, max_jint) \ 2748 \ 2749 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2750 "Minimum number of sweeper passes before an nmethod " \ 2751 "can be flushed") \ 2752 range(0, max_intx) \ 2753 \ 2754 product(bool, UseCodeAging, true, \ 2755 "Insert counter to detect warm methods") \ 2756 \ 2757 diagnostic(bool, StressCodeAging, false, \ 2758 "Start with counters compiled in") \ 2759 \ 2760 develop(bool, UseRelocIndex, false, \ 2761 "Use an index to speed random access to relocations") \ 2762 \ 2763 develop(bool, StressCodeBuffers, false, \ 2764 "Exercise code buffer expansion and other rare state changes") \ 2765 \ 2766 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2767 "Generate extra debugging information for non-safepoints in " \ 2768 "nmethods") \ 2769 \ 2770 product(bool, PrintVMOptions, false, \ 2771 "Print flags that appeared on the command line") \ 2772 \ 2773 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2774 "Ignore unrecognized VM options") \ 2775 \ 2776 product(bool, PrintCommandLineFlags, false, \ 2777 "Print flags specified on command line or set by ergonomics") \ 2778 \ 2779 product(bool, PrintFlagsInitial, false, \ 2780 "Print all VM flags before argument processing and exit VM") \ 2781 \ 2782 product(bool, PrintFlagsFinal, false, \ 2783 "Print all VM flags after argument and ergonomic processing") \ 2784 \ 2785 notproduct(bool, PrintFlagsWithComments, false, \ 2786 "Print all VM flags with default values and descriptions and " \ 2787 "exit") \ 2788 \ 2789 product(bool, PrintFlagsRanges, false, \ 2790 "Print VM flags and their ranges and exit VM") \ 2791 \ 2792 diagnostic(bool, SerializeVMOutput, true, \ 2793 "Use a mutex to serialize output to tty and LogFile") \ 2794 \ 2795 diagnostic(bool, DisplayVMOutput, true, \ 2796 "Display all VM output on the tty, independently of LogVMOutput") \ 2797 \ 2798 diagnostic(bool, LogVMOutput, false, \ 2799 "Save VM output to LogFile") \ 2800 \ 2801 diagnostic(ccstr, LogFile, NULL, \ 2802 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2803 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2804 \ 2805 product(ccstr, ErrorFile, NULL, \ 2806 "If an error occurs, save the error data to this file " \ 2807 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2808 \ 2809 product(bool, DisplayVMOutputToStderr, false, \ 2810 "If DisplayVMOutput is true, display all VM output to stderr") \ 2811 \ 2812 product(bool, DisplayVMOutputToStdout, false, \ 2813 "If DisplayVMOutput is true, display all VM output to stdout") \ 2814 \ 2815 product(bool, UseHeavyMonitors, false, \ 2816 "use heavyweight instead of lightweight Java monitors") \ 2817 \ 2818 product(bool, PrintStringTableStatistics, false, \ 2819 "print statistics about the StringTable and SymbolTable") \ 2820 \ 2821 diagnostic(bool, VerifyStringTableAtExit, false, \ 2822 "verify StringTable contents at exit") \ 2823 \ 2824 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2825 "print histogram of the symbol table") \ 2826 \ 2827 notproduct(bool, ExitVMOnVerifyError, false, \ 2828 "standard exit from VM if bytecode verify error " \ 2829 "(only in debug mode)") \ 2830 \ 2831 diagnostic(ccstr, AbortVMOnException, NULL, \ 2832 "Call fatal if this exception is thrown. Example: " \ 2833 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2834 \ 2835 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 2836 "Call fatal if the exception pointed by AbortVMOnException " \ 2837 "has this message") \ 2838 \ 2839 develop(bool, DebugVtables, false, \ 2840 "add debugging code to vtable dispatch") \ 2841 \ 2842 develop(bool, PrintVtables, false, \ 2843 "print vtables when printing klass") \ 2844 \ 2845 notproduct(bool, PrintVtableStats, false, \ 2846 "print vtables stats at end of run") \ 2847 \ 2848 develop(bool, TraceCreateZombies, false, \ 2849 "trace creation of zombie nmethods") \ 2850 \ 2851 notproduct(bool, IgnoreLockingAssertions, false, \ 2852 "disable locking assertions (for speed)") \ 2853 \ 2854 product(bool, RangeCheckElimination, true, \ 2855 "Eliminate range checks") \ 2856 \ 2857 develop_pd(bool, UncommonNullCast, \ 2858 "track occurrences of null in casts; adjust compiler tactics") \ 2859 \ 2860 develop(bool, TypeProfileCasts, true, \ 2861 "treat casts like calls for purposes of type profiling") \ 2862 \ 2863 develop(bool, DelayCompilationDuringStartup, true, \ 2864 "Delay invoking the compiler until main application class is " \ 2865 "loaded") \ 2866 \ 2867 develop(bool, CompileTheWorld, false, \ 2868 "Compile all methods in all classes in bootstrap class path " \ 2869 "(stress test)") \ 2870 \ 2871 develop(bool, CompileTheWorldPreloadClasses, true, \ 2872 "Preload all classes used by a class before start loading") \ 2873 \ 2874 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2875 "Force a safepoint every n compiles so sweeper can keep up") \ 2876 \ 2877 develop(bool, FillDelaySlots, true, \ 2878 "Fill delay slots (on SPARC only)") \ 2879 \ 2880 develop(bool, TimeLivenessAnalysis, false, \ 2881 "Time computation of bytecode liveness analysis") \ 2882 \ 2883 develop(bool, TraceLivenessGen, false, \ 2884 "Trace the generation of liveness analysis information") \ 2885 \ 2886 notproduct(bool, TraceLivenessQuery, false, \ 2887 "Trace queries of liveness analysis information") \ 2888 \ 2889 notproduct(bool, CollectIndexSetStatistics, false, \ 2890 "Collect information about IndexSets") \ 2891 \ 2892 develop(bool, UseLoopSafepoints, true, \ 2893 "Generate Safepoint nodes in every loop") \ 2894 \ 2895 develop(intx, FastAllocateSizeLimit, 128*K, \ 2896 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2897 "Inline allocations larger than this in doublewords must go slow")\ 2898 \ 2899 product(bool, AggressiveOpts, false, \ 2900 "Enable aggressive optimizations - see arguments.cpp") \ 2901 \ 2902 product_pd(bool, CompactStrings, \ 2903 "Enable Strings to use single byte chars in backing store") \ 2904 \ 2905 product_pd(uintx, TypeProfileLevel, \ 2906 "=XYZ, with Z: Type profiling of arguments at call; " \ 2907 "Y: Type profiling of return value at call; " \ 2908 "X: Type profiling of parameters to methods; " \ 2909 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2910 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 2911 \ 2912 product(intx, TypeProfileArgsLimit, 2, \ 2913 "max number of call arguments to consider for type profiling") \ 2914 range(0, 16) \ 2915 \ 2916 product(intx, TypeProfileParmsLimit, 2, \ 2917 "max number of incoming parameters to consider for type profiling"\ 2918 ", -1 for all") \ 2919 range(-1, 64) \ 2920 \ 2921 /* statistics */ \ 2922 develop(bool, CountCompiledCalls, false, \ 2923 "Count method invocations") \ 2924 \ 2925 notproduct(bool, CountRuntimeCalls, false, \ 2926 "Count VM runtime calls") \ 2927 \ 2928 develop(bool, CountJNICalls, false, \ 2929 "Count jni method invocations") \ 2930 \ 2931 notproduct(bool, CountJVMCalls, false, \ 2932 "Count jvm method invocations") \ 2933 \ 2934 notproduct(bool, CountRemovableExceptions, false, \ 2935 "Count exceptions that could be replaced by branches due to " \ 2936 "inlining") \ 2937 \ 2938 notproduct(bool, ICMissHistogram, false, \ 2939 "Produce histogram of IC misses") \ 2940 \ 2941 /* interpreter */ \ 2942 develop(bool, ClearInterpreterLocals, false, \ 2943 "Always clear local variables of interpreter activations upon " \ 2944 "entry") \ 2945 \ 2946 product_pd(bool, RewriteBytecodes, \ 2947 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2948 \ 2949 product_pd(bool, RewriteFrequentPairs, \ 2950 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2951 \ 2952 diagnostic(bool, PrintInterpreter, false, \ 2953 "Print the generated interpreter code") \ 2954 \ 2955 product(bool, UseInterpreter, true, \ 2956 "Use interpreter for non-compiled methods") \ 2957 \ 2958 develop(bool, UseFastSignatureHandlers, true, \ 2959 "Use fast signature handlers for native calls") \ 2960 \ 2961 product(bool, UseLoopCounter, true, \ 2962 "Increment invocation counter on backward branch") \ 2963 \ 2964 product_pd(bool, UseOnStackReplacement, \ 2965 "Use on stack replacement, calls runtime if invoc. counter " \ 2966 "overflows in loop") \ 2967 \ 2968 notproduct(bool, TraceOnStackReplacement, false, \ 2969 "Trace on stack replacement") \ 2970 \ 2971 product_pd(bool, PreferInterpreterNativeStubs, \ 2972 "Use always interpreter stubs for native methods invoked via " \ 2973 "interpreter") \ 2974 \ 2975 develop(bool, CountBytecodes, false, \ 2976 "Count number of bytecodes executed") \ 2977 \ 2978 develop(bool, PrintBytecodeHistogram, false, \ 2979 "Print histogram of the executed bytecodes") \ 2980 \ 2981 develop(bool, PrintBytecodePairHistogram, false, \ 2982 "Print histogram of the executed bytecode pairs") \ 2983 \ 2984 diagnostic(bool, PrintSignatureHandlers, false, \ 2985 "Print code generated for native method signature handlers") \ 2986 \ 2987 develop(bool, VerifyOops, false, \ 2988 "Do plausibility checks for oops") \ 2989 \ 2990 develop(bool, CheckUnhandledOops, false, \ 2991 "Check for unhandled oops in VM code") \ 2992 \ 2993 develop(bool, VerifyJNIFields, trueInDebug, \ 2994 "Verify jfieldIDs for instance fields") \ 2995 \ 2996 notproduct(bool, VerifyJNIEnvThread, false, \ 2997 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2998 "from JNI") \ 2999 \ 3000 develop(bool, VerifyFPU, false, \ 3001 "Verify FPU state (check for NaN's, etc.)") \ 3002 \ 3003 develop(bool, VerifyThread, false, \ 3004 "Watch the thread register for corruption (SPARC only)") \ 3005 \ 3006 develop(bool, VerifyActivationFrameSize, false, \ 3007 "Verify that activation frame didn't become smaller than its " \ 3008 "minimal size") \ 3009 \ 3010 develop(bool, TraceFrequencyInlining, false, \ 3011 "Trace frequency based inlining") \ 3012 \ 3013 develop_pd(bool, InlineIntrinsics, \ 3014 "Inline intrinsics that can be statically resolved") \ 3015 \ 3016 product_pd(bool, ProfileInterpreter, \ 3017 "Profile at the bytecode level during interpretation") \ 3018 \ 3019 develop(bool, TraceProfileInterpreter, false, \ 3020 "Trace profiling at the bytecode level during interpretation. " \ 3021 "This outputs the profiling information collected to improve " \ 3022 "jit compilation.") \ 3023 \ 3024 develop_pd(bool, ProfileTraps, \ 3025 "Profile deoptimization traps at the bytecode level") \ 3026 \ 3027 product(intx, ProfileMaturityPercentage, 20, \ 3028 "number of method invocations/branches (expressed as % of " \ 3029 "CompileThreshold) before using the method's profile") \ 3030 range(0, 100) \ 3031 \ 3032 diagnostic(bool, PrintMethodData, false, \ 3033 "Print the results of +ProfileInterpreter at end of run") \ 3034 \ 3035 develop(bool, VerifyDataPointer, trueInDebug, \ 3036 "Verify the method data pointer during interpreter profiling") \ 3037 \ 3038 develop(bool, VerifyCompiledCode, false, \ 3039 "Include miscellaneous runtime verifications in nmethod code; " \ 3040 "default off because it disturbs nmethod size heuristics") \ 3041 \ 3042 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 3043 "Manually make GC thread crash then dump java stack trace; " \ 3044 "Test only") \ 3045 \ 3046 /* compilation */ \ 3047 product(bool, UseCompiler, true, \ 3048 "Use Just-In-Time compilation") \ 3049 \ 3050 develop(bool, TraceCompilationPolicy, false, \ 3051 "Trace compilation policy") \ 3052 \ 3053 develop(bool, TimeCompilationPolicy, false, \ 3054 "Time the compilation policy") \ 3055 \ 3056 product(bool, UseCounterDecay, true, \ 3057 "Adjust recompilation counters") \ 3058 \ 3059 develop(intx, CounterHalfLifeTime, 30, \ 3060 "Half-life time of invocation counters (in seconds)") \ 3061 \ 3062 develop(intx, CounterDecayMinIntervalLength, 500, \ 3063 "The minimum interval (in milliseconds) between invocation of " \ 3064 "CounterDecay") \ 3065 \ 3066 product(bool, AlwaysCompileLoopMethods, false, \ 3067 "When using recompilation, never interpret methods " \ 3068 "containing loops") \ 3069 \ 3070 product(bool, DontCompileHugeMethods, true, \ 3071 "Do not compile methods > HugeMethodLimit") \ 3072 \ 3073 /* Bytecode escape analysis estimation. */ \ 3074 product(bool, EstimateArgEscape, true, \ 3075 "Analyze bytecodes to estimate escape state of arguments") \ 3076 \ 3077 product(intx, BCEATraceLevel, 0, \ 3078 "How much tracing to do of bytecode escape analysis estimates " \ 3079 "(0-3)") \ 3080 range(0, 3) \ 3081 \ 3082 product(intx, MaxBCEAEstimateLevel, 5, \ 3083 "Maximum number of nested calls that are analyzed by BC EA") \ 3084 range(0, max_jint) \ 3085 \ 3086 product(intx, MaxBCEAEstimateSize, 150, \ 3087 "Maximum bytecode size of a method to be analyzed by BC EA") \ 3088 range(0, max_jint) \ 3089 \ 3090 product(intx, AllocatePrefetchStyle, 1, \ 3091 "0 = no prefetch, " \ 3092 "1 = prefetch instructions for each allocation, " \ 3093 "2 = use TLAB watermark to gate allocation prefetch, " \ 3094 "3 = use BIS instruction on Sparc for allocation prefetch") \ 3095 range(0, 3) \ 3096 \ 3097 product(intx, AllocatePrefetchDistance, -1, \ 3098 "Distance to prefetch ahead of allocation pointer. " \ 3099 "-1: use system-specific value (automatically determined") \ 3100 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 3101 \ 3102 product(intx, AllocatePrefetchLines, 3, \ 3103 "Number of lines to prefetch ahead of array allocation pointer") \ 3104 range(1, max_jint / 2) \ 3105 \ 3106 product(intx, AllocateInstancePrefetchLines, 1, \ 3107 "Number of lines to prefetch ahead of instance allocation " \ 3108 "pointer") \ 3109 range(1, max_jint / 2) \ 3110 \ 3111 product(intx, AllocatePrefetchStepSize, 16, \ 3112 "Step size in bytes of sequential prefetch instructions") \ 3113 range(1, max_jint) \ 3114 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 3115 \ 3116 product(intx, AllocatePrefetchInstr, 0, \ 3117 "Prefetch instruction to prefetch ahead of allocation pointer") \ 3118 constraint(AllocatePrefetchInstrConstraintFunc, AfterErgo) \ 3119 \ 3120 /* deoptimization */ \ 3121 develop(bool, TraceDeoptimization, false, \ 3122 "Trace deoptimization") \ 3123 \ 3124 develop(bool, PrintDeoptimizationDetails, false, \ 3125 "Print more information about deoptimization") \ 3126 \ 3127 develop(bool, DebugDeoptimization, false, \ 3128 "Tracing various information while debugging deoptimization") \ 3129 \ 3130 product(intx, SelfDestructTimer, 0, \ 3131 "Will cause VM to terminate after a given time (in minutes) " \ 3132 "(0 means off)") \ 3133 range(0, max_intx) \ 3134 \ 3135 product(intx, MaxJavaStackTraceDepth, 1024, \ 3136 "The maximum number of lines in the stack trace for Java " \ 3137 "exceptions (0 means all)") \ 3138 range(0, max_jint/2) \ 3139 \ 3140 develop(bool, TraceStackWalk, false, \ 3141 "Trace stack walking") \ 3142 \ 3143 product(bool, MemberNameInStackFrame, true, \ 3144 "Use MemberName in StackFrame") \ 3145 \ 3146 /* notice: the max range value here is max_jint, not max_intx */ \ 3147 /* because of overflow issue */ \ 3148 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 3149 "Guarantee a safepoint (at least) every so many milliseconds " \ 3150 "(0 means none)")) \ 3151 NOT_EMBEDDED(range(0, max_jint)) \ 3152 \ 3153 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 3154 "Guarantee a safepoint (at least) every so many milliseconds " \ 3155 "(0 means none)")) \ 3156 EMBEDDED_ONLY(range(0, max_jint)) \ 3157 \ 3158 product(intx, SafepointTimeoutDelay, 10000, \ 3159 "Delay in milliseconds for option SafepointTimeout") \ 3160 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 3161 NOT_LP64(range(0, max_intx)) \ 3162 \ 3163 product(intx, NmethodSweepActivity, 10, \ 3164 "Removes cold nmethods from code cache if > 0. Higher values " \ 3165 "result in more aggressive sweeping") \ 3166 range(0, 2000) \ 3167 \ 3168 notproduct(bool, LogSweeper, false, \ 3169 "Keep a ring buffer of sweeper activity") \ 3170 \ 3171 notproduct(intx, SweeperLogEntries, 1024, \ 3172 "Number of records in the ring buffer of sweeper activity") \ 3173 \ 3174 notproduct(intx, MemProfilingInterval, 500, \ 3175 "Time between each invocation of the MemProfiler") \ 3176 \ 3177 develop(intx, MallocCatchPtr, -1, \ 3178 "Hit breakpoint when mallocing/freeing this pointer") \ 3179 \ 3180 notproduct(ccstrlist, SuppressErrorAt, "", \ 3181 "List of assertions (file:line) to muzzle") \ 3182 \ 3183 notproduct(size_t, HandleAllocationLimit, 1024, \ 3184 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 3185 "is used") \ 3186 \ 3187 develop(size_t, TotalHandleAllocationLimit, 1024, \ 3188 "Threshold for total handle allocation when " \ 3189 "+TraceHandleAllocation is used") \ 3190 \ 3191 develop(intx, StackPrintLimit, 100, \ 3192 "number of stack frames to print in VM-level stack dump") \ 3193 \ 3194 notproduct(intx, MaxElementPrintSize, 256, \ 3195 "maximum number of elements to print") \ 3196 \ 3197 notproduct(intx, MaxSubklassPrintSize, 4, \ 3198 "maximum number of subklasses to print when printing klass") \ 3199 \ 3200 product(intx, MaxInlineLevel, 9, \ 3201 "maximum number of nested calls that are inlined") \ 3202 range(0, max_jint) \ 3203 \ 3204 product(intx, MaxRecursiveInlineLevel, 1, \ 3205 "maximum number of nested recursive calls that are inlined") \ 3206 range(0, max_jint) \ 3207 \ 3208 develop(intx, MaxForceInlineLevel, 100, \ 3209 "maximum number of nested calls that are forced for inlining " \ 3210 "(using CompileCommand or marked w/ @ForceInline)") \ 3211 range(0, max_jint) \ 3212 \ 3213 product_pd(intx, InlineSmallCode, \ 3214 "Only inline already compiled methods if their code size is " \ 3215 "less than this") \ 3216 range(0, max_jint) \ 3217 \ 3218 product(intx, MaxInlineSize, 35, \ 3219 "The maximum bytecode size of a method to be inlined") \ 3220 range(0, max_jint) \ 3221 \ 3222 product_pd(intx, FreqInlineSize, \ 3223 "The maximum bytecode size of a frequent method to be inlined") \ 3224 range(0, max_jint) \ 3225 \ 3226 product(intx, MaxTrivialSize, 6, \ 3227 "The maximum bytecode size of a trivial method to be inlined") \ 3228 range(0, max_jint) \ 3229 \ 3230 product(intx, MinInliningThreshold, 250, \ 3231 "The minimum invocation count a method needs to have to be " \ 3232 "inlined") \ 3233 range(0, max_jint) \ 3234 \ 3235 develop(intx, MethodHistogramCutoff, 100, \ 3236 "The cutoff value for method invocation histogram (+CountCalls)") \ 3237 \ 3238 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3239 "Number of interpreted methods to show in profile") \ 3240 \ 3241 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 3242 "Number of compiled methods to show in profile") \ 3243 \ 3244 develop(intx, ProfilerNumberOfStubMethods, 25, \ 3245 "Number of stub methods to show in profile") \ 3246 \ 3247 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3248 "Number of runtime stub nodes to show in profile") \ 3249 \ 3250 product(intx, ProfileIntervalsTicks, 100, \ 3251 "Number of ticks between printing of interval profile " \ 3252 "(+ProfileIntervals)") \ 3253 range(0, max_intx) \ 3254 \ 3255 notproduct(intx, ScavengeALotInterval, 1, \ 3256 "Interval between which scavenge will occur with +ScavengeALot") \ 3257 \ 3258 notproduct(intx, FullGCALotInterval, 1, \ 3259 "Interval between which full gc will occur with +FullGCALot") \ 3260 \ 3261 notproduct(intx, FullGCALotStart, 0, \ 3262 "For which invocation to start FullGCAlot") \ 3263 \ 3264 notproduct(intx, FullGCALotDummies, 32*K, \ 3265 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3266 "to move") \ 3267 \ 3268 develop(intx, DontYieldALotInterval, 10, \ 3269 "Interval between which yields will be dropped (milliseconds)") \ 3270 \ 3271 develop(intx, MinSleepInterval, 1, \ 3272 "Minimum sleep() interval (milliseconds) when " \ 3273 "ConvertSleepToYield is off (used for Solaris)") \ 3274 \ 3275 develop(intx, ProfilerPCTickThreshold, 15, \ 3276 "Number of ticks in a PC buckets to be a hotspot") \ 3277 \ 3278 notproduct(intx, DeoptimizeALotInterval, 5, \ 3279 "Number of exits until DeoptimizeALot kicks in") \ 3280 \ 3281 notproduct(intx, ZombieALotInterval, 5, \ 3282 "Number of exits until ZombieALot kicks in") \ 3283 \ 3284 diagnostic(intx, MallocVerifyInterval, 0, \ 3285 "If non-zero, verify C heap after every N calls to " \ 3286 "malloc/realloc/free") \ 3287 range(0, max_intx) \ 3288 \ 3289 diagnostic(intx, MallocVerifyStart, 0, \ 3290 "If non-zero, start verifying C heap after Nth call to " \ 3291 "malloc/realloc/free") \ 3292 range(0, max_intx) \ 3293 \ 3294 diagnostic(uintx, MallocMaxTestWords, 0, \ 3295 "If non-zero, maximum number of words that malloc/realloc can " \ 3296 "allocate (for testing only)") \ 3297 range(0, max_uintx) \ 3298 \ 3299 product(intx, TypeProfileWidth, 2, \ 3300 "Number of receiver types to record in call/cast profile") \ 3301 range(0, 8) \ 3302 \ 3303 experimental(intx, MethodProfileWidth, 0, \ 3304 "Number of methods to record in call profile") \ 3305 \ 3306 develop(intx, BciProfileWidth, 2, \ 3307 "Number of return bci's to record in ret profile") \ 3308 \ 3309 product(intx, PerMethodRecompilationCutoff, 400, \ 3310 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3311 range(-1, max_intx) \ 3312 \ 3313 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3314 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3315 range(-1, max_intx) \ 3316 \ 3317 product(intx, PerMethodTrapLimit, 100, \ 3318 "Limit on traps (of one kind) in a method (includes inlines)") \ 3319 range(0, max_jint) \ 3320 \ 3321 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3322 "Limit on speculative traps (of one kind) in a method " \ 3323 "(includes inlines)") \ 3324 range(0, max_jint) \ 3325 \ 3326 product(intx, PerBytecodeTrapLimit, 4, \ 3327 "Limit on traps (of one kind) at a particular BCI") \ 3328 range(0, max_jint) \ 3329 \ 3330 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3331 "Extra method data trap entries for speculation") \ 3332 \ 3333 develop(intx, InlineFrequencyRatio, 20, \ 3334 "Ratio of call site execution to caller method invocation") \ 3335 range(0, max_jint) \ 3336 \ 3337 develop_pd(intx, InlineFrequencyCount, \ 3338 "Count of call site execution necessary to trigger frequent " \ 3339 "inlining") \ 3340 range(0, max_jint) \ 3341 \ 3342 develop(intx, InlineThrowCount, 50, \ 3343 "Force inlining of interpreted methods that throw this often") \ 3344 range(0, max_jint) \ 3345 \ 3346 develop(intx, InlineThrowMaxSize, 200, \ 3347 "Force inlining of throwing methods smaller than this") \ 3348 range(0, max_jint) \ 3349 \ 3350 develop(intx, ProfilerNodeSize, 1024, \ 3351 "Size in K to allocate for the Profile Nodes of each thread") \ 3352 range(0, 1024) \ 3353 \ 3354 /* gc parameters */ \ 3355 product(size_t, InitialHeapSize, 0, \ 3356 "Initial heap size (in bytes); zero means use ergonomics") \ 3357 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \ 3358 \ 3359 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3360 "Maximum heap size (in bytes)") \ 3361 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \ 3362 \ 3363 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3364 "Initial tenured generation size (in bytes)") \ 3365 range(0, max_uintx) \ 3366 \ 3367 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3368 "Initial new generation size (in bytes)") \ 3369 constraint(NewSizeConstraintFunc,AfterErgo) \ 3370 \ 3371 product(size_t, MaxNewSize, max_uintx, \ 3372 "Maximum new generation size (in bytes), max_uintx means set " \ 3373 "ergonomically") \ 3374 range(0, max_uintx) \ 3375 \ 3376 product_pd(size_t, HeapBaseMinAddress, \ 3377 "OS specific low limit for heap base address") \ 3378 constraint(HeapBaseMinAddressConstraintFunc,AfterErgo) \ 3379 \ 3380 product(size_t, PretenureSizeThreshold, 0, \ 3381 "Maximum size in bytes of objects allocated in DefNew " \ 3382 "generation; zero means no maximum") \ 3383 range(0, max_uintx) \ 3384 \ 3385 product(size_t, MinTLABSize, 2*K, \ 3386 "Minimum allowed TLAB size (in bytes)") \ 3387 range(1, max_uintx) \ 3388 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \ 3389 \ 3390 product(size_t, TLABSize, 0, \ 3391 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3392 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \ 3393 \ 3394 product(size_t, YoungPLABSize, 4096, \ 3395 "Size of young gen promotion LAB's (in HeapWords)") \ 3396 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \ 3397 \ 3398 product(size_t, OldPLABSize, 1024, \ 3399 "Size of old gen promotion LAB's (in HeapWords), or Number " \ 3400 "of blocks to attempt to claim when refilling CMS LAB's") \ 3401 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \ 3402 \ 3403 product(uintx, TLABAllocationWeight, 35, \ 3404 "Allocation averaging weight") \ 3405 range(0, 100) \ 3406 \ 3407 /* Limit the lower bound of this flag to 1 as it is used */ \ 3408 /* in a division expression. */ \ 3409 product(uintx, TLABWasteTargetPercent, 1, \ 3410 "Percentage of Eden that can be wasted") \ 3411 range(1, 100) \ 3412 \ 3413 product(uintx, TLABRefillWasteFraction, 64, \ 3414 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3415 range(1, max_juint) \ 3416 \ 3417 product(uintx, TLABWasteIncrement, 4, \ 3418 "Increment allowed waste at slow allocation") \ 3419 range(0, max_jint) \ 3420 constraint(TLABWasteIncrementConstraintFunc,AfterMemoryInit) \ 3421 \ 3422 product(uintx, SurvivorRatio, 8, \ 3423 "Ratio of eden/survivor space size") \ 3424 range(1, max_uintx-2) \ 3425 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \ 3426 \ 3427 product(uintx, NewRatio, 2, \ 3428 "Ratio of old/new generation sizes") \ 3429 range(0, max_uintx-1) \ 3430 \ 3431 product_pd(size_t, NewSizeThreadIncrease, \ 3432 "Additional size added to desired new generation size per " \ 3433 "non-daemon thread (in bytes)") \ 3434 range(0, max_uintx) \ 3435 \ 3436 product_pd(size_t, MetaspaceSize, \ 3437 "Initial size of Metaspaces (in bytes)") \ 3438 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 3439 \ 3440 product(size_t, MaxMetaspaceSize, max_uintx, \ 3441 "Maximum size of Metaspaces (in bytes)") \ 3442 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 3443 \ 3444 product(size_t, CompressedClassSpaceSize, 1*G, \ 3445 "Maximum size of class area in Metaspace when compressed " \ 3446 "class pointers are used") \ 3447 range(1*M, 3*G) \ 3448 \ 3449 manageable(uintx, MinHeapFreeRatio, 40, \ 3450 "The minimum percentage of heap free after GC to avoid expansion."\ 3451 " For most GCs this applies to the old generation. In G1 and" \ 3452 " ParallelGC it applies to the whole heap.") \ 3453 range(0, 100) \ 3454 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 3455 \ 3456 manageable(uintx, MaxHeapFreeRatio, 70, \ 3457 "The maximum percentage of heap free after GC to avoid shrinking."\ 3458 " For most GCs this applies to the old generation. In G1 and" \ 3459 " ParallelGC it applies to the whole heap.") \ 3460 range(0, 100) \ 3461 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 3462 \ 3463 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3464 "Number of milliseconds per MB of free space in the heap") \ 3465 range(0, max_intx) \ 3466 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 3467 \ 3468 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3469 "The minimum change in heap space due to GC (in bytes)") \ 3470 range(0, max_uintx) \ 3471 \ 3472 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3473 "The minimum expansion of Metaspace (in bytes)") \ 3474 range(0, max_uintx) \ 3475 \ 3476 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3477 "The maximum percentage of Metaspace free after GC to avoid " \ 3478 "shrinking") \ 3479 range(0, 100) \ 3480 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3481 \ 3482 product(uintx, MinMetaspaceFreeRatio, 40, \ 3483 "The minimum percentage of Metaspace free after GC to avoid " \ 3484 "expansion") \ 3485 range(0, 99) \ 3486 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3487 \ 3488 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3489 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3490 range(0, max_uintx) \ 3491 \ 3492 product(uintx, QueuedAllocationWarningCount, 0, \ 3493 "Number of times an allocation that queues behind a GC " \ 3494 "will retry before printing a warning") \ 3495 range(0, max_uintx) \ 3496 \ 3497 diagnostic(uintx, VerifyGCStartAt, 0, \ 3498 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3499 range(0, max_uintx) \ 3500 \ 3501 diagnostic(intx, VerifyGCLevel, 0, \ 3502 "Generation level at which to start +VerifyBefore/AfterGC") \ 3503 range(0, 1) \ 3504 \ 3505 product(uintx, MaxTenuringThreshold, 15, \ 3506 "Maximum value for tenuring threshold") \ 3507 range(0, markOopDesc::max_age + 1) \ 3508 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \ 3509 \ 3510 product(uintx, InitialTenuringThreshold, 7, \ 3511 "Initial value for tenuring threshold") \ 3512 range(0, markOopDesc::max_age + 1) \ 3513 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \ 3514 \ 3515 product(uintx, TargetSurvivorRatio, 50, \ 3516 "Desired percentage of survivor space used after scavenge") \ 3517 range(0, 100) \ 3518 \ 3519 product(uintx, MarkSweepDeadRatio, 5, \ 3520 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3521 "Serial mark sweep treats this as both the minimum and maximum " \ 3522 "value. " \ 3523 "CMS uses this value only if it falls back to mark sweep. " \ 3524 "Par compact uses a variable scale based on the density of the " \ 3525 "generation and treats this as the maximum value when the heap " \ 3526 "is either completely full or completely empty. Par compact " \ 3527 "also has a smaller default value; see arguments.cpp.") \ 3528 range(0, 100) \ 3529 \ 3530 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3531 "How often should we fully compact the heap (ignoring the dead " \ 3532 "space parameters)") \ 3533 range(1, max_uintx) \ 3534 \ 3535 product(intx, PrintCMSStatistics, 0, \ 3536 "Statistics for CMS") \ 3537 range(0, 2) \ 3538 \ 3539 product(bool, PrintCMSInitiationStatistics, false, \ 3540 "Statistics for initiating a CMS collection") \ 3541 \ 3542 product(intx, PrintFLSStatistics, 0, \ 3543 "Statistics for CMS' FreeListSpace") \ 3544 range(0, 2) \ 3545 \ 3546 product(intx, PrintFLSCensus, 0, \ 3547 "Census for CMS' FreeListSpace") \ 3548 range(0, 1) \ 3549 \ 3550 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3551 "Delay between expansion and allocation (in milliseconds)") \ 3552 \ 3553 develop(uintx, GCWorkerDelayMillis, 0, \ 3554 "Delay in scheduling GC workers (in milliseconds)") \ 3555 \ 3556 product(intx, DeferThrSuspendLoopCount, 4000, \ 3557 "(Unstable) Number of times to iterate in safepoint loop " \ 3558 "before blocking VM threads ") \ 3559 range(-1, max_jint-1) \ 3560 \ 3561 product(intx, DeferPollingPageLoopCount, -1, \ 3562 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3563 "before changing safepoint polling page to RO ") \ 3564 range(-1, max_jint-1) \ 3565 \ 3566 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3567 range(0, max_intx) \ 3568 \ 3569 product(bool, PSChunkLargeArrays, true, \ 3570 "Process large arrays in chunks") \ 3571 \ 3572 product(uintx, GCDrainStackTargetSize, 64, \ 3573 "Number of entries we will try to leave on the stack " \ 3574 "during parallel gc") \ 3575 range(0, max_juint) \ 3576 \ 3577 /* stack parameters */ \ 3578 product_pd(intx, StackYellowPages, \ 3579 "Number of yellow zone (recoverable overflows) pages") \ 3580 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 3581 \ 3582 product_pd(intx, StackRedPages, \ 3583 "Number of red zone (unrecoverable overflows) pages") \ 3584 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 3585 \ 3586 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3587 product_pd(intx, StackShadowPages, \ 3588 "Number of shadow zone (for overflow checking) pages " \ 3589 "this should exceed the depth of the VM and native call stack") \ 3590 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 3591 \ 3592 product_pd(intx, ThreadStackSize, \ 3593 "Thread Stack Size (in Kbytes)") \ 3594 range(0, max_intx-os::vm_page_size()) \ 3595 \ 3596 product_pd(intx, VMThreadStackSize, \ 3597 "Non-Java Thread Stack Size (in Kbytes)") \ 3598 range(0, max_intx/(1 * K)) \ 3599 \ 3600 product_pd(intx, CompilerThreadStackSize, \ 3601 "Compiler Thread Stack Size (in Kbytes)") \ 3602 range(0, max_intx /(1 * K)) \ 3603 \ 3604 develop_pd(size_t, JVMInvokeMethodSlack, \ 3605 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3606 \ 3607 /* code cache parameters */ \ 3608 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3609 develop(uintx, CodeCacheSegmentSize, \ 3610 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)), \ 3611 "Code cache segment size (in bytes) - smallest unit of " \ 3612 "allocation") \ 3613 range(1, 1024) \ 3614 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 3615 \ 3616 develop_pd(intx, CodeEntryAlignment, \ 3617 "Code entry alignment for generated code (in bytes)") \ 3618 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 3619 \ 3620 product_pd(intx, OptoLoopAlignment, \ 3621 "Align inner loops to zero relative to this modulus") \ 3622 range(1, 16) \ 3623 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 3624 \ 3625 product_pd(uintx, InitialCodeCacheSize, \ 3626 "Initial code cache size (in bytes)") \ 3627 range(0, max_uintx) \ 3628 \ 3629 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3630 "Minimum code cache size (in bytes) required to start VM.") \ 3631 range(0, max_uintx) \ 3632 \ 3633 product(bool, SegmentedCodeCache, false, \ 3634 "Use a segmented code cache") \ 3635 \ 3636 product_pd(uintx, ReservedCodeCacheSize, \ 3637 "Reserved code cache size (in bytes) - maximum code cache size") \ 3638 range(0, max_uintx) \ 3639 \ 3640 product_pd(uintx, NonProfiledCodeHeapSize, \ 3641 "Size of code heap with non-profiled methods (in bytes)") \ 3642 range(0, max_uintx) \ 3643 \ 3644 product_pd(uintx, ProfiledCodeHeapSize, \ 3645 "Size of code heap with profiled methods (in bytes)") \ 3646 range(0, max_uintx) \ 3647 \ 3648 product_pd(uintx, NonNMethodCodeHeapSize, \ 3649 "Size of code heap with non-nmethods (in bytes)") \ 3650 range(0, max_uintx) \ 3651 \ 3652 product_pd(uintx, CodeCacheExpansionSize, \ 3653 "Code cache expansion size (in bytes)") \ 3654 range(0, max_uintx) \ 3655 \ 3656 develop_pd(uintx, CodeCacheMinBlockLength, \ 3657 "Minimum number of segments in a code cache block") \ 3658 range(1, 100) \ 3659 \ 3660 notproduct(bool, ExitOnFullCodeCache, false, \ 3661 "Exit the VM if we fill the code cache") \ 3662 \ 3663 product(bool, UseCodeCacheFlushing, true, \ 3664 "Remove cold/old nmethods from the code cache") \ 3665 \ 3666 product(uintx, StartAggressiveSweepingAt, 10, \ 3667 "Start aggressive sweeping if X[%] of the code cache is free." \ 3668 "Segmented code cache: X[%] of the non-profiled heap." \ 3669 "Non-segmented code cache: X[%] of the total code cache") \ 3670 range(0, 100) \ 3671 \ 3672 /* interpreter debugging */ \ 3673 develop(intx, BinarySwitchThreshold, 5, \ 3674 "Minimal number of lookupswitch entries for rewriting to binary " \ 3675 "switch") \ 3676 \ 3677 develop(intx, StopInterpreterAt, 0, \ 3678 "Stop interpreter execution at specified bytecode number") \ 3679 \ 3680 develop(intx, TraceBytecodesAt, 0, \ 3681 "Trace bytecodes starting with specified bytecode number") \ 3682 \ 3683 /* compiler interface */ \ 3684 develop(intx, CIStart, 0, \ 3685 "The id of the first compilation to permit") \ 3686 \ 3687 develop(intx, CIStop, max_jint, \ 3688 "The id of the last compilation to permit") \ 3689 \ 3690 develop(intx, CIStartOSR, 0, \ 3691 "The id of the first osr compilation to permit " \ 3692 "(CICountOSR must be on)") \ 3693 \ 3694 develop(intx, CIStopOSR, max_jint, \ 3695 "The id of the last osr compilation to permit " \ 3696 "(CICountOSR must be on)") \ 3697 \ 3698 develop(intx, CIBreakAtOSR, -1, \ 3699 "The id of osr compilation to break at") \ 3700 \ 3701 develop(intx, CIBreakAt, -1, \ 3702 "The id of compilation to break at") \ 3703 \ 3704 product(ccstrlist, CompileOnly, "", \ 3705 "List of methods (pkg/class.name) to restrict compilation to") \ 3706 \ 3707 product(ccstr, CompileCommandFile, NULL, \ 3708 "Read compiler commands from this file [.hotspot_compiler]") \ 3709 \ 3710 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 3711 "Read compiler directives from this file") \ 3712 \ 3713 product(ccstrlist, CompileCommand, "", \ 3714 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3715 \ 3716 develop(bool, ReplayCompiles, false, \ 3717 "Enable replay of compilations from ReplayDataFile") \ 3718 \ 3719 product(ccstr, ReplayDataFile, NULL, \ 3720 "File containing compilation replay information" \ 3721 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3722 \ 3723 product(ccstr, InlineDataFile, NULL, \ 3724 "File containing inlining replay information" \ 3725 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3726 \ 3727 develop(intx, ReplaySuppressInitializers, 2, \ 3728 "Control handling of class initialization during replay: " \ 3729 "0 - don't do anything special; " \ 3730 "1 - treat all class initializers as empty; " \ 3731 "2 - treat class initializers for application classes as empty; " \ 3732 "3 - allow all class initializers to run during bootstrap but " \ 3733 " pretend they are empty after starting replay") \ 3734 range(0, 3) \ 3735 \ 3736 develop(bool, ReplayIgnoreInitErrors, false, \ 3737 "Ignore exceptions thrown during initialization for replay") \ 3738 \ 3739 product(bool, DumpReplayDataOnError, true, \ 3740 "Record replay data for crashing compiler threads") \ 3741 \ 3742 product(bool, CICompilerCountPerCPU, false, \ 3743 "1 compiler thread for log(N CPUs)") \ 3744 \ 3745 develop(intx, CIFireOOMAt, -1, \ 3746 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3747 "(non-negative value throws OOM after this many CI accesses " \ 3748 "in each compile)") \ 3749 notproduct(intx, CICrashAt, -1, \ 3750 "id of compilation to trigger assert in compiler thread for " \ 3751 "the purpose of testing, e.g. generation of replay data") \ 3752 notproduct(bool, CIObjectFactoryVerify, false, \ 3753 "enable potentially expensive verification in ciObjectFactory") \ 3754 \ 3755 /* Priorities */ \ 3756 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3757 \ 3758 product(intx, ThreadPriorityPolicy, 0, \ 3759 "0 : Normal. "\ 3760 " VM chooses priorities that are appropriate for normal "\ 3761 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3762 " to normal native priority. Java priorities below " \ 3763 " NORM_PRIORITY map to lower native priority values. On "\ 3764 " Windows applications are allowed to use higher native "\ 3765 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3766 " not use the highest possible native priority, "\ 3767 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3768 " system threads. On Linux thread priorities are ignored "\ 3769 " because the OS does not support static priority in "\ 3770 " SCHED_OTHER scheduling class which is the only choice for "\ 3771 " non-root, non-realtime applications. "\ 3772 "1 : Aggressive. "\ 3773 " Java thread priorities map over to the entire range of "\ 3774 " native thread priorities. Higher Java thread priorities map "\ 3775 " to higher native thread priorities. This policy should be "\ 3776 " used with care, as sometimes it can cause performance "\ 3777 " degradation in the application and/or the entire system. On "\ 3778 " Linux this policy requires root privilege.") \ 3779 range(0, 1) \ 3780 \ 3781 product(bool, ThreadPriorityVerbose, false, \ 3782 "Print priority changes") \ 3783 \ 3784 product(intx, CompilerThreadPriority, -1, \ 3785 "The native priority at which compiler threads should run " \ 3786 "(-1 means no change)") \ 3787 range(min_jint, max_jint) \ 3788 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 3789 \ 3790 product(intx, VMThreadPriority, -1, \ 3791 "The native priority at which the VM thread should run " \ 3792 "(-1 means no change)") \ 3793 range(-1, 127) \ 3794 \ 3795 product(bool, CompilerThreadHintNoPreempt, true, \ 3796 "(Solaris only) Give compiler threads an extra quanta") \ 3797 \ 3798 product(bool, VMThreadHintNoPreempt, false, \ 3799 "(Solaris only) Give VM thread an extra quanta") \ 3800 \ 3801 product(intx, JavaPriority1_To_OSPriority, -1, \ 3802 "Map Java priorities to OS priorities") \ 3803 range(-1, 127) \ 3804 \ 3805 product(intx, JavaPriority2_To_OSPriority, -1, \ 3806 "Map Java priorities to OS priorities") \ 3807 range(-1, 127) \ 3808 \ 3809 product(intx, JavaPriority3_To_OSPriority, -1, \ 3810 "Map Java priorities to OS priorities") \ 3811 range(-1, 127) \ 3812 \ 3813 product(intx, JavaPriority4_To_OSPriority, -1, \ 3814 "Map Java priorities to OS priorities") \ 3815 range(-1, 127) \ 3816 \ 3817 product(intx, JavaPriority5_To_OSPriority, -1, \ 3818 "Map Java priorities to OS priorities") \ 3819 range(-1, 127) \ 3820 \ 3821 product(intx, JavaPriority6_To_OSPriority, -1, \ 3822 "Map Java priorities to OS priorities") \ 3823 range(-1, 127) \ 3824 \ 3825 product(intx, JavaPriority7_To_OSPriority, -1, \ 3826 "Map Java priorities to OS priorities") \ 3827 range(-1, 127) \ 3828 \ 3829 product(intx, JavaPriority8_To_OSPriority, -1, \ 3830 "Map Java priorities to OS priorities") \ 3831 range(-1, 127) \ 3832 \ 3833 product(intx, JavaPriority9_To_OSPriority, -1, \ 3834 "Map Java priorities to OS priorities") \ 3835 range(-1, 127) \ 3836 \ 3837 product(intx, JavaPriority10_To_OSPriority,-1, \ 3838 "Map Java priorities to OS priorities") \ 3839 range(-1, 127) \ 3840 \ 3841 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3842 "Java thread priority 10 maps to critical scheduling priority") \ 3843 \ 3844 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3845 "Compiler thread(s) run at critical scheduling priority") \ 3846 \ 3847 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3848 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3849 \ 3850 /* compiler debugging */ \ 3851 notproduct(intx, CompileTheWorldStartAt, 1, \ 3852 "First class to consider when using +CompileTheWorld") \ 3853 \ 3854 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3855 "Last class to consider when using +CompileTheWorld") \ 3856 \ 3857 develop(intx, NewCodeParameter, 0, \ 3858 "Testing Only: Create a dedicated integer parameter before " \ 3859 "putback") \ 3860 \ 3861 /* new oopmap storage allocation */ \ 3862 develop(intx, MinOopMapAllocation, 8, \ 3863 "Minimum number of OopMap entries in an OopMapSet") \ 3864 \ 3865 /* Background Compilation */ \ 3866 develop(intx, LongCompileThreshold, 50, \ 3867 "Used with +TraceLongCompiles") \ 3868 \ 3869 /* recompilation */ \ 3870 product_pd(intx, CompileThreshold, \ 3871 "number of interpreted method invocations before (re-)compiling") \ 3872 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 3873 \ 3874 product(double, CompileThresholdScaling, 1.0, \ 3875 "Factor to control when first compilation happens " \ 3876 "(both with and without tiered compilation): " \ 3877 "values greater than 1.0 delay counter overflow, " \ 3878 "values between 0 and 1.0 rush counter overflow, " \ 3879 "value of 1.0 leaves compilation thresholds unchanged " \ 3880 "value of 0.0 is equivalent to -Xint. " \ 3881 "" \ 3882 "Flag can be set as per-method option. " \ 3883 "If a value is specified for a method, compilation thresholds " \ 3884 "for that method are scaled by both the value of the global flag "\ 3885 "and the value of the per-method flag.") \ 3886 range(0.0, DBL_MAX) \ 3887 \ 3888 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3889 "Interpreter (tier 0) invocation notification frequency") \ 3890 range(0, 30) \ 3891 \ 3892 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3893 "C1 without MDO (tier 2) invocation notification frequency") \ 3894 range(0, 30) \ 3895 \ 3896 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3897 "C1 with MDO profiling (tier 3) invocation notification " \ 3898 "frequency") \ 3899 range(0, 30) \ 3900 \ 3901 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3902 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3903 range(0, 30) \ 3904 \ 3905 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3906 "Interpreter (tier 0) invocation notification frequency") \ 3907 range(0, 30) \ 3908 \ 3909 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3910 "C1 without MDO (tier 2) invocation notification frequency") \ 3911 range(0, 30) \ 3912 \ 3913 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3914 "C1 with MDO profiling (tier 3) invocation notification " \ 3915 "frequency") \ 3916 range(0, 30) \ 3917 \ 3918 product(intx, Tier2CompileThreshold, 0, \ 3919 "threshold at which tier 2 compilation is invoked") \ 3920 range(0, max_jint) \ 3921 \ 3922 product(intx, Tier2BackEdgeThreshold, 0, \ 3923 "Back edge threshold at which tier 2 compilation is invoked") \ 3924 range(0, max_jint) \ 3925 \ 3926 product(intx, Tier3InvocationThreshold, 200, \ 3927 "Compile if number of method invocations crosses this " \ 3928 "threshold") \ 3929 range(0, max_jint) \ 3930 \ 3931 product(intx, Tier3MinInvocationThreshold, 100, \ 3932 "Minimum invocation to compile at tier 3") \ 3933 range(0, max_jint) \ 3934 \ 3935 product(intx, Tier3CompileThreshold, 2000, \ 3936 "Threshold at which tier 3 compilation is invoked (invocation " \ 3937 "minimum must be satisfied)") \ 3938 range(0, max_jint) \ 3939 \ 3940 product(intx, Tier3BackEdgeThreshold, 60000, \ 3941 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3942 range(0, max_jint) \ 3943 \ 3944 product(intx, Tier4InvocationThreshold, 5000, \ 3945 "Compile if number of method invocations crosses this " \ 3946 "threshold") \ 3947 range(0, max_jint) \ 3948 \ 3949 product(intx, Tier4MinInvocationThreshold, 600, \ 3950 "Minimum invocation to compile at tier 4") \ 3951 range(0, max_jint) \ 3952 \ 3953 product(intx, Tier4CompileThreshold, 15000, \ 3954 "Threshold at which tier 4 compilation is invoked (invocation " \ 3955 "minimum must be satisfied") \ 3956 range(0, max_jint) \ 3957 \ 3958 product(intx, Tier4BackEdgeThreshold, 40000, \ 3959 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3960 range(0, max_jint) \ 3961 \ 3962 product(intx, Tier3DelayOn, 5, \ 3963 "If C2 queue size grows over this amount per compiler thread " \ 3964 "stop compiling at tier 3 and start compiling at tier 2") \ 3965 range(0, max_jint) \ 3966 \ 3967 product(intx, Tier3DelayOff, 2, \ 3968 "If C2 queue size is less than this amount per compiler thread " \ 3969 "allow methods compiled at tier 2 transition to tier 3") \ 3970 range(0, max_jint) \ 3971 \ 3972 product(intx, Tier3LoadFeedback, 5, \ 3973 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3974 "reaches this amount per compiler thread") \ 3975 range(0, max_jint) \ 3976 \ 3977 product(intx, Tier4LoadFeedback, 3, \ 3978 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3979 "reaches this amount per compiler thread") \ 3980 range(0, max_jint) \ 3981 \ 3982 product(intx, TieredCompileTaskTimeout, 50, \ 3983 "Kill compile task if method was not used within " \ 3984 "given timeout in milliseconds") \ 3985 range(0, max_intx) \ 3986 \ 3987 product(intx, TieredStopAtLevel, 4, \ 3988 "Stop at given compilation level") \ 3989 range(0, 4) \ 3990 \ 3991 product(intx, Tier0ProfilingStartPercentage, 200, \ 3992 "Start profiling in interpreter if the counters exceed tier 3 " \ 3993 "thresholds by the specified percentage") \ 3994 range(0, max_jint) \ 3995 \ 3996 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3997 "Increase the compile threshold for C1 compilation if the code " \ 3998 "cache is filled by the specified percentage") \ 3999 range(0, 99) \ 4000 \ 4001 product(intx, TieredRateUpdateMinTime, 1, \ 4002 "Minimum rate sampling interval (in milliseconds)") \ 4003 range(0, max_intx) \ 4004 \ 4005 product(intx, TieredRateUpdateMaxTime, 25, \ 4006 "Maximum rate sampling interval (in milliseconds)") \ 4007 range(0, max_intx) \ 4008 \ 4009 product_pd(bool, TieredCompilation, \ 4010 "Enable tiered compilation") \ 4011 \ 4012 product(bool, PrintTieredEvents, false, \ 4013 "Print tiered events notifications") \ 4014 \ 4015 product_pd(intx, OnStackReplacePercentage, \ 4016 "NON_TIERED number of method invocations/branches (expressed as " \ 4017 "% of CompileThreshold) before (re-)compiling OSR code") \ 4018 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 4019 \ 4020 product(intx, InterpreterProfilePercentage, 33, \ 4021 "NON_TIERED number of method invocations/branches (expressed as " \ 4022 "% of CompileThreshold) before profiling in the interpreter") \ 4023 range(0, 100) \ 4024 \ 4025 develop(intx, MaxRecompilationSearchLength, 10, \ 4026 "The maximum number of frames to inspect when searching for " \ 4027 "recompilee") \ 4028 \ 4029 develop(intx, MaxInterpretedSearchLength, 3, \ 4030 "The maximum number of interpreted frames to skip when searching "\ 4031 "for recompilee") \ 4032 \ 4033 develop(intx, DesiredMethodLimit, 8000, \ 4034 "The desired maximum method size (in bytecodes) after inlining") \ 4035 \ 4036 develop(intx, HugeMethodLimit, 8000, \ 4037 "Don't compile methods larger than this if " \ 4038 "+DontCompileHugeMethods") \ 4039 \ 4040 /* New JDK 1.4 reflection implementation */ \ 4041 \ 4042 develop(intx, FastSuperclassLimit, 8, \ 4043 "Depth of hardwired instanceof accelerator array") \ 4044 \ 4045 /* Properties for Java libraries */ \ 4046 \ 4047 product(size_t, MaxDirectMemorySize, 0, \ 4048 "Maximum total size of NIO direct-buffer allocations") \ 4049 range(0, (size_t)SIZE_MAX) \ 4050 \ 4051 /* Flags used for temporary code during development */ \ 4052 \ 4053 diagnostic(bool, UseNewCode, false, \ 4054 "Testing Only: Use the new version while testing") \ 4055 \ 4056 diagnostic(bool, UseNewCode2, false, \ 4057 "Testing Only: Use the new version while testing") \ 4058 \ 4059 diagnostic(bool, UseNewCode3, false, \ 4060 "Testing Only: Use the new version while testing") \ 4061 \ 4062 /* flags for performance data collection */ \ 4063 \ 4064 product(bool, UsePerfData, falseInEmbedded, \ 4065 "Flag to disable jvmstat instrumentation for performance testing "\ 4066 "and problem isolation purposes") \ 4067 \ 4068 product(bool, PerfDataSaveToFile, false, \ 4069 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 4070 \ 4071 product(ccstr, PerfDataSaveFile, NULL, \ 4072 "Save PerfData memory to the specified absolute pathname. " \ 4073 "The string %p in the file name (if present) " \ 4074 "will be replaced by pid") \ 4075 \ 4076 product(intx, PerfDataSamplingInterval, 50, \ 4077 "Data sampling interval (in milliseconds)") \ 4078 range(PeriodicTask::min_interval, max_jint) \ 4079 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 4080 \ 4081 develop(bool, PerfTraceDataCreation, false, \ 4082 "Trace creation of Performance Data Entries") \ 4083 \ 4084 develop(bool, PerfTraceMemOps, false, \ 4085 "Trace PerfMemory create/attach/detach calls") \ 4086 \ 4087 product(bool, PerfDisableSharedMem, false, \ 4088 "Store performance data in standard memory") \ 4089 \ 4090 product(intx, PerfDataMemorySize, 64*K, \ 4091 "Size of performance data memory region. Will be rounded " \ 4092 "up to a multiple of the native os page size.") \ 4093 range(128, 32*64*K) \ 4094 \ 4095 product(intx, PerfMaxStringConstLength, 1024, \ 4096 "Maximum PerfStringConstant string length before truncation") \ 4097 range(32, 32*K) \ 4098 \ 4099 product(bool, PerfAllowAtExitRegistration, false, \ 4100 "Allow registration of atexit() methods") \ 4101 \ 4102 product(bool, PerfBypassFileSystemCheck, false, \ 4103 "Bypass Win32 file system criteria checks (Windows Only)") \ 4104 \ 4105 product(intx, UnguardOnExecutionViolation, 0, \ 4106 "Unguard page and retry on no-execute fault (Win32 only) " \ 4107 "0=off, 1=conservative, 2=aggressive") \ 4108 range(0, 2) \ 4109 \ 4110 /* Serviceability Support */ \ 4111 \ 4112 product(bool, ManagementServer, false, \ 4113 "Create JMX Management Server") \ 4114 \ 4115 product(bool, DisableAttachMechanism, false, \ 4116 "Disable mechanism that allows tools to attach to this VM") \ 4117 \ 4118 product(bool, StartAttachListener, false, \ 4119 "Always start Attach Listener at VM startup") \ 4120 \ 4121 manageable(bool, PrintConcurrentLocks, false, \ 4122 "Print java.util.concurrent locks in thread dump") \ 4123 \ 4124 product(bool, TransmitErrorReport, false, \ 4125 "Enable error report transmission on erroneous termination") \ 4126 \ 4127 product(ccstr, ErrorReportServer, NULL, \ 4128 "Override built-in error report server address") \ 4129 \ 4130 /* Shared spaces */ \ 4131 \ 4132 product(bool, UseSharedSpaces, true, \ 4133 "Use shared spaces for metadata") \ 4134 \ 4135 product(bool, VerifySharedSpaces, false, \ 4136 "Verify shared spaces (false for default archive, true for " \ 4137 "archive specified by -XX:SharedArchiveFile)") \ 4138 \ 4139 product(bool, RequireSharedSpaces, false, \ 4140 "Require shared spaces for metadata") \ 4141 \ 4142 product(bool, DumpSharedSpaces, false, \ 4143 "Special mode: JVM reads a class list, loads classes, builds " \ 4144 "shared spaces, and dumps the shared spaces to a file to be " \ 4145 "used in future JVM runs") \ 4146 \ 4147 product(bool, PrintSharedSpaces, false, \ 4148 "Print usage of shared spaces") \ 4149 \ 4150 product(bool, PrintSharedArchiveAndExit, false, \ 4151 "Print shared archive file contents") \ 4152 \ 4153 product(bool, PrintSharedDictionary, false, \ 4154 "If PrintSharedArchiveAndExit is true, also print the shared " \ 4155 "dictionary") \ 4156 \ 4157 product(size_t, SharedReadWriteSize, DEFAULT_SHARED_READ_WRITE_SIZE, \ 4158 "Size of read-write space for metadata (in bytes)") \ 4159 range(MIN_SHARED_READ_WRITE_SIZE, MAX_SHARED_READ_WRITE_SIZE) \ 4160 \ 4161 product(size_t, SharedReadOnlySize, DEFAULT_SHARED_READ_ONLY_SIZE, \ 4162 "Size of read-only space for metadata (in bytes)") \ 4163 range(MIN_SHARED_READ_ONLY_SIZE, MAX_SHARED_READ_ONLY_SIZE) \ 4164 \ 4165 product(size_t, SharedMiscDataSize, DEFAULT_SHARED_MISC_DATA_SIZE, \ 4166 "Size of the shared miscellaneous data area (in bytes)") \ 4167 range(MIN_SHARED_MISC_DATA_SIZE, MAX_SHARED_MISC_DATA_SIZE) \ 4168 \ 4169 product(size_t, SharedMiscCodeSize, DEFAULT_SHARED_MISC_CODE_SIZE, \ 4170 "Size of the shared miscellaneous code area (in bytes)") \ 4171 range(MIN_SHARED_MISC_CODE_SIZE, MAX_SHARED_MISC_CODE_SIZE) \ 4172 \ 4173 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 4174 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 4175 "Address to allocate shared memory region for class data") \ 4176 range(0, SIZE_MAX) \ 4177 \ 4178 product(uintx, SharedSymbolTableBucketSize, 4, \ 4179 "Average number of symbols per bucket in shared table") \ 4180 range(2, 246) \ 4181 \ 4182 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 4183 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 4184 "classes. Just exclude them from the shared dictionary.") \ 4185 \ 4186 diagnostic(bool, PrintMethodHandleStubs, false, \ 4187 "Print generated stub code for method handles") \ 4188 \ 4189 develop(bool, TraceMethodHandles, false, \ 4190 "trace internal method handle operations") \ 4191 \ 4192 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4193 "perform extra checks when constructing method handles") \ 4194 \ 4195 diagnostic(bool, ShowHiddenFrames, false, \ 4196 "show method handle implementation frames (usually hidden)") \ 4197 \ 4198 experimental(bool, TrustFinalNonStaticFields, false, \ 4199 "trust final non-static declarations for constant folding") \ 4200 \ 4201 diagnostic(bool, FoldStableValues, true, \ 4202 "Optimize loads from stable fields (marked w/ @Stable)") \ 4203 \ 4204 develop(bool, TraceInvokeDynamic, false, \ 4205 "trace internal invoke dynamic operations") \ 4206 \ 4207 diagnostic(bool, PauseAtStartup, false, \ 4208 "Causes the VM to pause at startup time and wait for the pause " \ 4209 "file to be removed (default: ./vm.paused.<pid>)") \ 4210 \ 4211 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4212 "The file to create and for whose removal to await when pausing " \ 4213 "at startup. (default: ./vm.paused.<pid>)") \ 4214 \ 4215 diagnostic(bool, PauseAtExit, false, \ 4216 "Pause and wait for keypress on exit if a debugger is attached") \ 4217 \ 4218 product(bool, ExtendedDTraceProbes, false, \ 4219 "Enable performance-impacting dtrace probes") \ 4220 \ 4221 product(bool, DTraceMethodProbes, false, \ 4222 "Enable dtrace probes for method-entry and method-exit") \ 4223 \ 4224 product(bool, DTraceAllocProbes, false, \ 4225 "Enable dtrace probes for object allocation") \ 4226 \ 4227 product(bool, DTraceMonitorProbes, false, \ 4228 "Enable dtrace probes for monitor events") \ 4229 \ 4230 product(bool, RelaxAccessControlCheck, false, \ 4231 "Relax the access control checks in the verifier") \ 4232 \ 4233 product(uintx, StringTableSize, defaultStringTableSize, \ 4234 "Number of buckets in the interned String table") \ 4235 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4236 \ 4237 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4238 "Number of buckets in the JVM internal Symbol table") \ 4239 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4240 \ 4241 product(bool, UseStringDeduplication, false, \ 4242 "Use string deduplication") \ 4243 \ 4244 product(bool, PrintStringDeduplicationStatistics, false, \ 4245 "Print string deduplication statistics") \ 4246 \ 4247 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4248 "A string must reach this age (or be promoted to an old region) " \ 4249 "to be considered for deduplication") \ 4250 range(1, markOopDesc::max_age) \ 4251 \ 4252 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4253 "Force table resize every time the table is scanned") \ 4254 \ 4255 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4256 "Force table rehash every time the table is scanned") \ 4257 \ 4258 diagnostic(bool, WhiteBoxAPI, false, \ 4259 "Enable internal testing APIs") \ 4260 \ 4261 product(bool, PrintGCCause, true, \ 4262 "Include GC cause in GC logging") \ 4263 \ 4264 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4265 "Default survivor space alignment in bytes") \ 4266 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 4267 \ 4268 product(bool , AllowNonVirtualCalls, false, \ 4269 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4270 \ 4271 product(ccstr, DumpLoadedClassList, NULL, \ 4272 "Dump the names all loaded classes, that could be stored into " \ 4273 "the CDS archive, in the specified file") \ 4274 \ 4275 product(ccstr, SharedClassListFile, NULL, \ 4276 "Override the default CDS class list") \ 4277 \ 4278 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4279 "Override the default location of the CDS archive file") \ 4280 \ 4281 product(ccstr, ExtraSharedClassListFile, NULL, \ 4282 "Extra classlist for building the CDS archive file") \ 4283 \ 4284 experimental(size_t, ArrayAllocatorMallocLimit, \ 4285 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4286 "Allocation less than this value will be allocated " \ 4287 "using malloc. Larger allocations will use mmap.") \ 4288 \ 4289 experimental(bool, AlwaysAtomicAccesses, false, \ 4290 "Accesses to all variables should always be atomic") \ 4291 \ 4292 product(bool, EnableTracing, false, \ 4293 "Enable event-based tracing") \ 4294 \ 4295 product(bool, UseLockedTracing, false, \ 4296 "Use locked-tracing when doing event-based tracing") \ 4297 \ 4298 diagnostic(bool, UseUnalignedAccesses, false, \ 4299 "Use unaligned memory accesses in Unsafe") \ 4300 \ 4301 product_pd(bool, PreserveFramePointer, \ 4302 "Use the FP register for holding the frame pointer " \ 4303 "and not as a general purpose register.") \ 4304 \ 4305 diagnostic(bool, CheckIntrinsics, true, \ 4306 "When a class C is loaded, check that " \ 4307 "(1) all intrinsics defined by the VM for class C are present "\ 4308 "in the loaded class file and are marked with the " \ 4309 "@HotSpotIntrinsicCandidate annotation, that " \ 4310 "(2) there is an intrinsic registered for all loaded methods " \ 4311 "that are annotated with the @HotSpotIntrinsicCandidate " \ 4312 "annotation, and that " \ 4313 "(3) no orphan methods exist for class C (i.e., methods for " \ 4314 "which the VM declares an intrinsic but that are not declared "\ 4315 "in the loaded class C. " \ 4316 "Check (3) is available only in debug builds.") \ 4317 \ 4318 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 4319 "Disable backwards compatibility for compile commands.") \ 4320 \ 4321 diagnostic(bool, PrintCompilerDirectives, false, \ 4322 "Print compiler directives on installation.") 4323 4324/* 4325 * Macros for factoring of globals 4326 */ 4327 4328// Interface macros 4329#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4330#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4331#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4332#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4333#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4334#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4335#ifdef PRODUCT 4336#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 4337#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 4338#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 4339#else 4340#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4341#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4342#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4343#endif // PRODUCT 4344// Special LP64 flags, product only needed for now. 4345#ifdef _LP64 4346#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4347#else 4348#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4349#endif // _LP64 4350 4351// Implementation macros 4352#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4353#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4354#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4355#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4356#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4357#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4358#ifdef PRODUCT 4359#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 4360#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 4361#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 4362#else 4363#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4364#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4365#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4366#endif // PRODUCT 4367#ifdef _LP64 4368#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4369#else 4370#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4371#endif // _LP64 4372 4373// Only materialize src code for range checking when required, ignore otherwise 4374#define IGNORE_RANGE(a, b) 4375// Only materialize src code for contraint checking when required, ignore otherwise 4376#define IGNORE_CONSTRAINT(func,type) 4377 4378RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4379 DECLARE_PD_DEVELOPER_FLAG, \ 4380 DECLARE_PRODUCT_FLAG, \ 4381 DECLARE_PD_PRODUCT_FLAG, \ 4382 DECLARE_DIAGNOSTIC_FLAG, \ 4383 DECLARE_EXPERIMENTAL_FLAG, \ 4384 DECLARE_NOTPRODUCT_FLAG, \ 4385 DECLARE_MANAGEABLE_FLAG, \ 4386 DECLARE_PRODUCT_RW_FLAG, \ 4387 DECLARE_LP64_PRODUCT_FLAG, \ 4388 IGNORE_RANGE, \ 4389 IGNORE_CONSTRAINT) 4390 4391RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4392 DECLARE_PD_DEVELOPER_FLAG, \ 4393 DECLARE_PRODUCT_FLAG, \ 4394 DECLARE_PD_PRODUCT_FLAG, \ 4395 DECLARE_DIAGNOSTIC_FLAG, \ 4396 DECLARE_NOTPRODUCT_FLAG, \ 4397 IGNORE_RANGE, \ 4398 IGNORE_CONSTRAINT) 4399 4400ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4401 DECLARE_PRODUCT_FLAG, \ 4402 DECLARE_DIAGNOSTIC_FLAG, \ 4403 DECLARE_EXPERIMENTAL_FLAG, \ 4404 DECLARE_NOTPRODUCT_FLAG, \ 4405 IGNORE_RANGE, \ 4406 IGNORE_CONSTRAINT) 4407 4408// Extensions 4409 4410#include "runtime/globals_ext.hpp" 4411 4412#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4413