globals.hpp revision 5428:85c1ca43713f
1/* 2 * Copyright (c) 1997, 2013, 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 30// use this for flags that are true per default in the tiered build 31// but false in non-tiered builds, and vice versa 32#ifdef TIERED 33#define trueInTiered true 34#define falseInTiered false 35#else 36#define trueInTiered false 37#define falseInTiered true 38#endif 39 40#ifdef TARGET_ARCH_x86 41# include "globals_x86.hpp" 42#endif 43#ifdef TARGET_ARCH_sparc 44# include "globals_sparc.hpp" 45#endif 46#ifdef TARGET_ARCH_zero 47# include "globals_zero.hpp" 48#endif 49#ifdef TARGET_ARCH_arm 50# include "globals_arm.hpp" 51#endif 52#ifdef TARGET_ARCH_ppc 53# include "globals_ppc.hpp" 54#endif 55#ifdef TARGET_OS_FAMILY_linux 56# include "globals_linux.hpp" 57#endif 58#ifdef TARGET_OS_FAMILY_solaris 59# include "globals_solaris.hpp" 60#endif 61#ifdef TARGET_OS_FAMILY_windows 62# include "globals_windows.hpp" 63#endif 64#ifdef TARGET_OS_FAMILY_bsd 65# include "globals_bsd.hpp" 66#endif 67#ifdef TARGET_OS_ARCH_linux_x86 68# include "globals_linux_x86.hpp" 69#endif 70#ifdef TARGET_OS_ARCH_linux_sparc 71# include "globals_linux_sparc.hpp" 72#endif 73#ifdef TARGET_OS_ARCH_linux_zero 74# include "globals_linux_zero.hpp" 75#endif 76#ifdef TARGET_OS_ARCH_solaris_x86 77# include "globals_solaris_x86.hpp" 78#endif 79#ifdef TARGET_OS_ARCH_solaris_sparc 80# include "globals_solaris_sparc.hpp" 81#endif 82#ifdef TARGET_OS_ARCH_windows_x86 83# include "globals_windows_x86.hpp" 84#endif 85#ifdef TARGET_OS_ARCH_linux_arm 86# include "globals_linux_arm.hpp" 87#endif 88#ifdef TARGET_OS_ARCH_linux_ppc 89# include "globals_linux_ppc.hpp" 90#endif 91#ifdef TARGET_OS_ARCH_bsd_x86 92# include "globals_bsd_x86.hpp" 93#endif 94#ifdef TARGET_OS_ARCH_bsd_zero 95# include "globals_bsd_zero.hpp" 96#endif 97#ifdef COMPILER1 98#ifdef TARGET_ARCH_x86 99# include "c1_globals_x86.hpp" 100#endif 101#ifdef TARGET_ARCH_sparc 102# include "c1_globals_sparc.hpp" 103#endif 104#ifdef TARGET_ARCH_arm 105# include "c1_globals_arm.hpp" 106#endif 107#ifdef TARGET_ARCH_ppc 108# include "c1_globals_ppc.hpp" 109#endif 110#ifdef TARGET_OS_FAMILY_linux 111# include "c1_globals_linux.hpp" 112#endif 113#ifdef TARGET_OS_FAMILY_solaris 114# include "c1_globals_solaris.hpp" 115#endif 116#ifdef TARGET_OS_FAMILY_windows 117# include "c1_globals_windows.hpp" 118#endif 119#ifdef TARGET_OS_FAMILY_bsd 120# include "c1_globals_bsd.hpp" 121#endif 122#endif 123#ifdef COMPILER2 124#ifdef TARGET_ARCH_x86 125# include "c2_globals_x86.hpp" 126#endif 127#ifdef TARGET_ARCH_sparc 128# include "c2_globals_sparc.hpp" 129#endif 130#ifdef TARGET_ARCH_arm 131# include "c2_globals_arm.hpp" 132#endif 133#ifdef TARGET_OS_FAMILY_linux 134# include "c2_globals_linux.hpp" 135#endif 136#ifdef TARGET_OS_FAMILY_solaris 137# include "c2_globals_solaris.hpp" 138#endif 139#ifdef TARGET_OS_FAMILY_windows 140# include "c2_globals_windows.hpp" 141#endif 142#ifdef TARGET_OS_FAMILY_bsd 143# include "c2_globals_bsd.hpp" 144#endif 145#endif 146#ifdef SHARK 147#ifdef TARGET_ARCH_zero 148# include "shark_globals_zero.hpp" 149#endif 150#endif 151 152#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 153define_pd_global(bool, BackgroundCompilation, false); 154define_pd_global(bool, UseTLAB, false); 155define_pd_global(bool, CICompileOSR, false); 156define_pd_global(bool, UseTypeProfile, false); 157define_pd_global(bool, UseOnStackReplacement, false); 158define_pd_global(bool, InlineIntrinsics, false); 159define_pd_global(bool, PreferInterpreterNativeStubs, true); 160define_pd_global(bool, ProfileInterpreter, false); 161define_pd_global(bool, ProfileTraps, false); 162define_pd_global(bool, TieredCompilation, false); 163 164define_pd_global(intx, CompileThreshold, 0); 165define_pd_global(intx, BackEdgeThreshold, 0); 166 167define_pd_global(intx, OnStackReplacePercentage, 0); 168define_pd_global(bool, ResizeTLAB, false); 169define_pd_global(intx, FreqInlineSize, 0); 170define_pd_global(intx, InlineSmallCode, 0); 171define_pd_global(intx, NewSizeThreadIncrease, 4*K); 172define_pd_global(intx, InlineClassNatives, true); 173define_pd_global(intx, InlineUnsafeOps, true); 174define_pd_global(intx, InitialCodeCacheSize, 160*K); 175define_pd_global(intx, ReservedCodeCacheSize, 32*M); 176define_pd_global(intx, CodeCacheExpansionSize, 32*K); 177define_pd_global(intx, CodeCacheMinBlockLength, 1); 178define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 179define_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M)); 180define_pd_global(bool, NeverActAsServerClassMachine, true); 181define_pd_global(uint64_t,MaxRAM, 1ULL*G); 182#define CI_COMPILER_COUNT 0 183#else 184 185#ifdef COMPILER2 186#define CI_COMPILER_COUNT 2 187#else 188#define CI_COMPILER_COUNT 1 189#endif // COMPILER2 190 191#endif // no compilers 192 193// string type aliases used only in this file 194typedef const char* ccstr; 195typedef const char* ccstrlist; // represents string arguments which accumulate 196 197enum FlagValueOrigin { 198 DEFAULT = 0, 199 COMMAND_LINE = 1, 200 ENVIRON_VAR = 2, 201 CONFIG_FILE = 3, 202 MANAGEMENT = 4, 203 ERGONOMIC = 5, 204 ATTACH_ON_DEMAND = 6, 205 INTERNAL = 99 206}; 207 208struct Flag { 209 const char *type; 210 const char *name; 211 void* addr; 212 213 NOT_PRODUCT(const char *doc;) 214 215 const char *kind; 216 FlagValueOrigin origin; 217 218 // points to all Flags static array 219 static Flag *flags; 220 221 // number of flags 222 static size_t numFlags; 223 224 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false); 225 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 226 227 bool is_bool() const { return strcmp(type, "bool") == 0; } 228 bool get_bool() const { return *((bool*) addr); } 229 void set_bool(bool value) { *((bool*) addr) = value; } 230 231 bool is_intx() const { return strcmp(type, "intx") == 0; } 232 intx get_intx() const { return *((intx*) addr); } 233 void set_intx(intx value) { *((intx*) addr) = value; } 234 235 bool is_uintx() const { return strcmp(type, "uintx") == 0; } 236 uintx get_uintx() const { return *((uintx*) addr); } 237 void set_uintx(uintx value) { *((uintx*) addr) = value; } 238 239 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 240 uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 241 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 242 243 bool is_double() const { return strcmp(type, "double") == 0; } 244 double get_double() const { return *((double*) addr); } 245 void set_double(double value) { *((double*) addr) = value; } 246 247 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 248 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 249 ccstr get_ccstr() const { return *((ccstr*) addr); } 250 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 251 252 bool is_unlocker() const; 253 bool is_unlocked() const; 254 bool is_writeable() const; 255 bool is_external() const; 256 257 bool is_unlocker_ext() const; 258 bool is_unlocked_ext() const; 259 bool is_writeable_ext() const; 260 bool is_external_ext() const; 261 262 void get_locked_message(char*, int) const; 263 void get_locked_message_ext(char*, int) const; 264 265 void print_on(outputStream* st, bool withComments = false ); 266 void print_as_flag(outputStream* st); 267}; 268 269// debug flags control various aspects of the VM and are global accessible 270 271// use FlagSetting to temporarily change some debug flag 272// e.g. FlagSetting fs(DebugThisAndThat, true); 273// restored to previous value upon leaving scope 274class FlagSetting { 275 bool val; 276 bool* flag; 277 public: 278 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 279 ~FlagSetting() { *flag = val; } 280}; 281 282 283class CounterSetting { 284 intx* counter; 285 public: 286 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 287 ~CounterSetting() { (*counter)--; } 288}; 289 290 291class UIntFlagSetting { 292 uintx val; 293 uintx* flag; 294 public: 295 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 296 ~UIntFlagSetting() { *flag = val; } 297}; 298 299 300class DoubleFlagSetting { 301 double val; 302 double* flag; 303 public: 304 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 305 ~DoubleFlagSetting() { *flag = val; } 306}; 307 308 309class CommandLineFlags { 310 public: 311 static bool boolAt(char* name, size_t len, bool* value); 312 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 313 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 314 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 315 316 static bool intxAt(char* name, size_t len, intx* value); 317 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 318 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 319 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 320 321 static bool uintxAt(char* name, size_t len, uintx* value); 322 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 323 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 324 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 325 326 static bool uint64_tAt(char* name, size_t len, uint64_t* value); 327 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 328 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); 329 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 330 331 static bool doubleAt(char* name, size_t len, double* value); 332 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 333 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 334 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 335 336 static bool ccstrAt(char* name, size_t len, ccstr* value); 337 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 338 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 339 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 340 341 // Returns false if name is not a command line flag. 342 static bool wasSetOnCmdline(const char* name, bool* value); 343 static void printSetFlags(outputStream* out); 344 345 static void printFlags(outputStream* out, bool withComments); 346 347 static void verify() PRODUCT_RETURN; 348}; 349 350// use this for flags that are true by default in the debug version but 351// false in the optimized version, and vice versa 352#ifdef ASSERT 353#define trueInDebug true 354#define falseInDebug false 355#else 356#define trueInDebug false 357#define falseInDebug true 358#endif 359 360// use this for flags that are true per default in the product build 361// but false in development builds, and vice versa 362#ifdef PRODUCT 363#define trueInProduct true 364#define falseInProduct false 365#else 366#define trueInProduct false 367#define falseInProduct true 368#endif 369 370#ifdef JAVASE_EMBEDDED 371#define falseInEmbedded false 372#else 373#define falseInEmbedded true 374#endif 375 376// develop flags are settable / visible only during development and are constant in the PRODUCT version 377// product flags are always settable / visible 378// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 379 380// A flag must be declared with one of the following types: 381// bool, intx, uintx, ccstr. 382// The type "ccstr" is an alias for "const char*" and is used 383// only in this file, because the macrology requires single-token type names. 384 385// Note: Diagnostic options not meant for VM tuning or for product modes. 386// They are to be used for VM quality assurance or field diagnosis 387// of VM bugs. They are hidden so that users will not be encouraged to 388// try them as if they were VM ordinary execution options. However, they 389// are available in the product version of the VM. Under instruction 390// from support engineers, VM customers can turn them on to collect 391// diagnostic information about VM problems. To use a VM diagnostic 392// option, you must first specify +UnlockDiagnosticVMOptions. 393// (This master switch also affects the behavior of -Xprintflags.) 394// 395// experimental flags are in support of features that are not 396// part of the officially supported product, but are available 397// for experimenting with. They could, for example, be performance 398// features that may not have undergone full or rigorous QA, but which may 399// help performance in some cases and released for experimentation 400// by the community of users and developers. This flag also allows one to 401// be able to build a fully supported product that nonetheless also 402// ships with some unsupported, lightly tested, experimental features. 403// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 404// UnlockExperimentalVMOptions flag, which allows the control and 405// modification of the experimental flags. 406// 407// Nota bene: neither diagnostic nor experimental options should be used casually, 408// and they are not supported on production loads, except under explicit 409// direction from support engineers. 410// 411// manageable flags are writeable external product flags. 412// They are dynamically writeable through the JDK management interface 413// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 414// These flags are external exported interface (see CCC). The list of 415// manageable flags can be queried programmatically through the management 416// interface. 417// 418// A flag can be made as "manageable" only if 419// - the flag is defined in a CCC as an external exported interface. 420// - the VM implementation supports dynamic setting of the flag. 421// This implies that the VM must *always* query the flag variable 422// and not reuse state related to the flag state at any given time. 423// - you want the flag to be queried programmatically by the customers. 424// 425// product_rw flags are writeable internal product flags. 426// They are like "manageable" flags but for internal/private use. 427// The list of product_rw flags are internal/private flags which 428// may be changed/removed in a future release. It can be set 429// through the management interface to get/set value 430// when the name of flag is supplied. 431// 432// A flag can be made as "product_rw" only if 433// - the VM implementation supports dynamic setting of the flag. 434// This implies that the VM must *always* query the flag variable 435// and not reuse state related to the flag state at any given time. 436// 437// Note that when there is a need to support develop flags to be writeable, 438// it can be done in the same way as product_rw. 439 440#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 441 \ 442 lp64_product(bool, UseCompressedOops, false, \ 443 "Use 32-bit object references in 64-bit VM. " \ 444 "lp64_product means flag is always constant in 32 bit VM") \ 445 \ 446 lp64_product(bool, UseCompressedClassPointers, false, \ 447 "Use 32-bit class pointers in 64-bit VM. " \ 448 "lp64_product means flag is always constant in 32 bit VM") \ 449 \ 450 notproduct(bool, CheckCompressedOops, true, \ 451 "Generate checks in encoding/decoding code in debug VM") \ 452 \ 453 product_pd(uintx, HeapBaseMinAddress, \ 454 "OS specific low limit for heap base address") \ 455 \ 456 diagnostic(bool, PrintCompressedOopsMode, false, \ 457 "Print compressed oops base address and encoding mode") \ 458 \ 459 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 460 "Default object alignment in bytes, 8 is minimum") \ 461 \ 462 product(bool, AssumeMP, false, \ 463 "Instruct the VM to assume multiple processors are available") \ 464 \ 465 /* UseMembar is theoretically a temp flag used for memory barrier \ 466 * removal testing. It was supposed to be removed before FCS but has \ 467 * been re-added (see 6401008) */ \ 468 product_pd(bool, UseMembar, \ 469 "(Unstable) Issues membars on thread state transitions") \ 470 \ 471 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 472 * that don't support it. This will be replaced by processor detection \ 473 * logic. \ 474 */ \ 475 product(bool, UsePPCLWSYNC, true, \ 476 "Use lwsync instruction if true, else use slower sync") \ 477 \ 478 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 479 "Clean the chunk pool asynchronously") \ 480 \ 481 /* Temporary: See 6948537 */ \ 482 experimental(bool, UseMemSetInBOT, true, \ 483 "(Unstable) uses memset in BOT updates in GC code") \ 484 \ 485 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 486 "Enable normal processing of flags relating to field diagnostics")\ 487 \ 488 experimental(bool, UnlockExperimentalVMOptions, false, \ 489 "Enable normal processing of flags relating to experimental " \ 490 "features") \ 491 \ 492 product(bool, JavaMonitorsInStackTrace, true, \ 493 "Print information about Java monitor locks when the stacks are" \ 494 "dumped") \ 495 \ 496 product_pd(bool, UseLargePages, \ 497 "Use large page memory") \ 498 \ 499 product_pd(bool, UseLargePagesIndividualAllocation, \ 500 "Allocate large pages individually for better affinity") \ 501 \ 502 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 503 "Fail large pages individual allocation") \ 504 \ 505 product(bool, UseLargePagesInMetaspace, false, \ 506 "Use large page memory in metaspace. " \ 507 "Only used if UseLargePages is enabled.") \ 508 \ 509 develop(bool, TracePageSizes, false, \ 510 "Trace page size selection and usage") \ 511 \ 512 product(bool, UseNUMA, false, \ 513 "Use NUMA if available") \ 514 \ 515 product(bool, UseNUMAInterleaving, false, \ 516 "Interleave memory across NUMA nodes if available") \ 517 \ 518 product(uintx, NUMAInterleaveGranularity, 2*M, \ 519 "Granularity to use for NUMA interleaving on Windows OS") \ 520 \ 521 product(bool, ForceNUMA, false, \ 522 "Force NUMA optimizations on single-node/UMA systems") \ 523 \ 524 product(uintx, NUMAChunkResizeWeight, 20, \ 525 "Percentage (0-100) used to weigh the current sample when " \ 526 "computing exponentially decaying average for " \ 527 "AdaptiveNUMAChunkSizing") \ 528 \ 529 product(uintx, NUMASpaceResizeRate, 1*G, \ 530 "Do not reallocate more than this amount per collection") \ 531 \ 532 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 533 "Enable adaptive chunk sizing for NUMA") \ 534 \ 535 product(bool, NUMAStats, false, \ 536 "Print NUMA stats in detailed heap information") \ 537 \ 538 product(uintx, NUMAPageScanRate, 256, \ 539 "Maximum number of pages to include in the page scan procedure") \ 540 \ 541 product_pd(bool, NeedsDeoptSuspend, \ 542 "True for register window machines (sparc/ia64)") \ 543 \ 544 product(intx, UseSSE, 99, \ 545 "Highest supported SSE instructions set on x86/x64") \ 546 \ 547 product(bool, UseAES, false, \ 548 "Control whether AES instructions can be used on x86/x64") \ 549 \ 550 product(uintx, LargePageSizeInBytes, 0, \ 551 "Large page size (0 to let VM choose the page size)") \ 552 \ 553 product(uintx, LargePageHeapSizeThreshold, 128*M, \ 554 "Use large pages if maximum heap is at least this big") \ 555 \ 556 product(bool, ForceTimeHighResolution, false, \ 557 "Using high time resolution (for Win32 only)") \ 558 \ 559 develop(bool, TraceItables, false, \ 560 "Trace initialization and use of itables") \ 561 \ 562 develop(bool, TracePcPatching, false, \ 563 "Trace usage of frame::patch_pc") \ 564 \ 565 develop(bool, TraceJumps, false, \ 566 "Trace assembly jumps in thread ring buffer") \ 567 \ 568 develop(bool, TraceRelocator, false, \ 569 "Trace the bytecode relocator") \ 570 \ 571 develop(bool, TraceLongCompiles, false, \ 572 "Print out every time compilation is longer than " \ 573 "a given threshold") \ 574 \ 575 develop(bool, SafepointALot, false, \ 576 "Generate a lot of safepoints. This works with " \ 577 "GuaranteedSafepointInterval") \ 578 \ 579 product_pd(bool, BackgroundCompilation, \ 580 "A thread requesting compilation is not blocked during " \ 581 "compilation") \ 582 \ 583 product(bool, PrintVMQWaitTime, false, \ 584 "Print out the waiting time in VM operation queue") \ 585 \ 586 develop(bool, NoYieldsInMicrolock, false, \ 587 "Disable yields in microlock") \ 588 \ 589 develop(bool, TraceOopMapGeneration, false, \ 590 "Show OopMapGeneration") \ 591 \ 592 product(bool, MethodFlushing, true, \ 593 "Reclamation of zombie and not-entrant methods") \ 594 \ 595 develop(bool, VerifyStack, false, \ 596 "Verify stack of each thread when it is entering a runtime call") \ 597 \ 598 diagnostic(bool, ForceUnreachable, false, \ 599 "Make all non code cache addresses to be unreachable by " \ 600 "forcing use of 64bit literal fixups") \ 601 \ 602 notproduct(bool, StressDerivedPointers, false, \ 603 "Force scavenge when a derived pointer is detected on stack " \ 604 "after rtm call") \ 605 \ 606 develop(bool, TraceDerivedPointers, false, \ 607 "Trace traversal of derived pointers on stack") \ 608 \ 609 notproduct(bool, TraceCodeBlobStacks, false, \ 610 "Trace stack-walk of codeblobs") \ 611 \ 612 product(bool, PrintJNIResolving, false, \ 613 "Used to implement -v:jni") \ 614 \ 615 notproduct(bool, PrintRewrites, false, \ 616 "Print methods that are being rewritten") \ 617 \ 618 product(bool, UseInlineCaches, true, \ 619 "Use Inline Caches for virtual calls ") \ 620 \ 621 develop(bool, InlineArrayCopy, true, \ 622 "Inline arraycopy native that is known to be part of " \ 623 "base library DLL") \ 624 \ 625 develop(bool, InlineObjectHash, true, \ 626 "Inline Object::hashCode() native that is known to be part " \ 627 "of base library DLL") \ 628 \ 629 develop(bool, InlineNatives, true, \ 630 "Inline natives that are known to be part of base library DLL") \ 631 \ 632 develop(bool, InlineMathNatives, true, \ 633 "Inline SinD, CosD, etc.") \ 634 \ 635 develop(bool, InlineClassNatives, true, \ 636 "Inline Class.isInstance, etc") \ 637 \ 638 develop(bool, InlineThreadNatives, true, \ 639 "Inline Thread.currentThread, etc") \ 640 \ 641 develop(bool, InlineUnsafeOps, true, \ 642 "Inline memory ops (native methods) from sun.misc.Unsafe") \ 643 \ 644 product(bool, CriticalJNINatives, true, \ 645 "Check for critical JNI entry points") \ 646 \ 647 notproduct(bool, StressCriticalJNINatives, false, \ 648 "Exercise register saving code in critical natives") \ 649 \ 650 product(bool, UseSSE42Intrinsics, false, \ 651 "SSE4.2 versions of intrinsics") \ 652 \ 653 product(bool, UseAESIntrinsics, false, \ 654 "Use intrinsics for AES versions of crypto") \ 655 \ 656 product(bool, UseCRC32Intrinsics, false, \ 657 "use intrinsics for java.util.zip.CRC32") \ 658 \ 659 develop(bool, TraceCallFixup, false, \ 660 "Trace all call fixups") \ 661 \ 662 develop(bool, DeoptimizeALot, false, \ 663 "Deoptimize at every exit from the runtime system") \ 664 \ 665 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 666 "A comma separated list of bcis to deoptimize at") \ 667 \ 668 product(bool, DeoptimizeRandom, false, \ 669 "Deoptimize random frames on random exit from the runtime system")\ 670 \ 671 notproduct(bool, ZombieALot, false, \ 672 "Create zombies (non-entrant) at exit from the runtime system") \ 673 \ 674 product(bool, UnlinkSymbolsALot, false, \ 675 "Unlink unreferenced symbols from the symbol table at safepoints")\ 676 \ 677 notproduct(bool, WalkStackALot, false, \ 678 "Trace stack (no print) at every exit from the runtime system") \ 679 \ 680 product(bool, Debugging, false, \ 681 "Set when executing debug methods in debug.cpp " \ 682 "(to prevent triggering assertions)") \ 683 \ 684 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 685 "Enable strict checks that safepoints cannot happen for threads " \ 686 "that use No_Safepoint_Verifier") \ 687 \ 688 notproduct(bool, VerifyLastFrame, false, \ 689 "Verify oops on last frame on entry to VM") \ 690 \ 691 develop(bool, TraceHandleAllocation, false, \ 692 "Print out warnings when suspiciously many handles are allocated")\ 693 \ 694 product(bool, UseCompilerSafepoints, true, \ 695 "Stop at safepoints in compiled code") \ 696 \ 697 product(bool, FailOverToOldVerifier, true, \ 698 "Fail over to old verifier when split verifier fails") \ 699 \ 700 develop(bool, ShowSafepointMsgs, false, \ 701 "Show message about safepoint synchronization") \ 702 \ 703 product(bool, SafepointTimeout, false, \ 704 "Time out and warn or fail after SafepointTimeoutDelay " \ 705 "milliseconds if failed to reach safepoint") \ 706 \ 707 develop(bool, DieOnSafepointTimeout, false, \ 708 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 709 \ 710 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 711 /* typically, at most a few retries are needed */ \ 712 product(intx, SuspendRetryCount, 50, \ 713 "Maximum retry count for an external suspend request") \ 714 \ 715 product(intx, SuspendRetryDelay, 5, \ 716 "Milliseconds to delay per retry (* current_retry_count)") \ 717 \ 718 product(bool, AssertOnSuspendWaitFailure, false, \ 719 "Assert/Guarantee on external suspend wait failure") \ 720 \ 721 product(bool, TraceSuspendWaitFailures, false, \ 722 "Trace external suspend wait failures") \ 723 \ 724 product(bool, MaxFDLimit, true, \ 725 "Bump the number of file descriptors to maximum in Solaris") \ 726 \ 727 diagnostic(bool, LogEvents, true, \ 728 "Enable the various ring buffer event logs") \ 729 \ 730 diagnostic(uintx, LogEventsBufferEntries, 10, \ 731 "Number of ring buffer event logs") \ 732 \ 733 product(bool, BytecodeVerificationRemote, true, \ 734 "Enable the Java bytecode verifier for remote classes") \ 735 \ 736 product(bool, BytecodeVerificationLocal, false, \ 737 "Enable the Java bytecode verifier for local classes") \ 738 \ 739 develop(bool, ForceFloatExceptions, trueInDebug, \ 740 "Force exceptions on FP stack under/overflow") \ 741 \ 742 develop(bool, VerifyStackAtCalls, false, \ 743 "Verify that the stack pointer is unchanged after calls") \ 744 \ 745 develop(bool, TraceJavaAssertions, false, \ 746 "Trace java language assertions") \ 747 \ 748 notproduct(bool, CheckAssertionStatusDirectives, false, \ 749 "Temporary - see javaClasses.cpp") \ 750 \ 751 notproduct(bool, PrintMallocFree, false, \ 752 "Trace calls to C heap malloc/free allocation") \ 753 \ 754 product(bool, PrintOopAddress, false, \ 755 "Always print the location of the oop") \ 756 \ 757 notproduct(bool, VerifyCodeCacheOften, false, \ 758 "Verify compiled-code cache often") \ 759 \ 760 develop(bool, ZapDeadCompiledLocals, false, \ 761 "Zap dead locals in compiler frames") \ 762 \ 763 notproduct(bool, ZapDeadLocalsOld, false, \ 764 "Zap dead locals (old version, zaps all frames when " \ 765 "entering the VM") \ 766 \ 767 notproduct(bool, CheckOopishValues, false, \ 768 "Warn if value contains oop (requires ZapDeadLocals)") \ 769 \ 770 develop(bool, UseMallocOnly, false, \ 771 "Use only malloc/free for allocation (no resource area/arena)") \ 772 \ 773 develop(bool, PrintMalloc, false, \ 774 "Print all malloc/free calls") \ 775 \ 776 develop(bool, PrintMallocStatistics, false, \ 777 "Print malloc/free statistics") \ 778 \ 779 develop(bool, ZapResourceArea, trueInDebug, \ 780 "Zap freed resource/arena space with 0xABABABAB") \ 781 \ 782 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 783 "Zap freed VM handle space with 0xBCBCBCBC") \ 784 \ 785 develop(bool, ZapJNIHandleArea, trueInDebug, \ 786 "Zap freed JNI handle space with 0xFEFEFEFE") \ 787 \ 788 notproduct(bool, ZapStackSegments, trueInDebug, \ 789 "Zap allocated/freed stack segments with 0xFADFADED") \ 790 \ 791 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 792 "Zap unused heap space with 0xBAADBABE") \ 793 \ 794 develop(bool, TraceZapUnusedHeapArea, false, \ 795 "Trace zapping of unused heap space") \ 796 \ 797 develop(bool, CheckZapUnusedHeapArea, false, \ 798 "Check zapping of unused heap space") \ 799 \ 800 develop(bool, ZapFillerObjects, trueInDebug, \ 801 "Zap filler objects with 0xDEAFBABE") \ 802 \ 803 develop(bool, PrintVMMessages, true, \ 804 "Print VM messages on console") \ 805 \ 806 product(bool, PrintGCApplicationConcurrentTime, false, \ 807 "Print the time the application has been running") \ 808 \ 809 product(bool, PrintGCApplicationStoppedTime, false, \ 810 "Print the time the application has been stopped") \ 811 \ 812 diagnostic(bool, VerboseVerification, false, \ 813 "Display detailed verification details") \ 814 \ 815 notproduct(uintx, ErrorHandlerTest, 0, \ 816 "If > 0, provokes an error after VM initialization; the value " \ 817 "determines which error to provoke. See test_error_handler() " \ 818 "in debug.cpp.") \ 819 \ 820 develop(bool, Verbose, false, \ 821 "Print additional debugging information from other modes") \ 822 \ 823 develop(bool, PrintMiscellaneous, false, \ 824 "Print uncategorized debugging information (requires +Verbose)") \ 825 \ 826 develop(bool, WizardMode, false, \ 827 "Print much more debugging information") \ 828 \ 829 product(bool, ShowMessageBoxOnError, false, \ 830 "Keep process alive on VM fatal error") \ 831 \ 832 product(bool, CreateMinidumpOnCrash, false, \ 833 "Create minidump on VM fatal error") \ 834 \ 835 product_pd(bool, UseOSErrorReporting, \ 836 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 837 \ 838 product(bool, SuppressFatalErrorMessage, false, \ 839 "Report NO fatal error message (avoid deadlock)") \ 840 \ 841 product(ccstrlist, OnError, "", \ 842 "Run user-defined commands on fatal error; see VMError.cpp " \ 843 "for examples") \ 844 \ 845 product(ccstrlist, OnOutOfMemoryError, "", \ 846 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 847 \ 848 manageable(bool, HeapDumpBeforeFullGC, false, \ 849 "Dump heap to file before any major stop-the-world GC") \ 850 \ 851 manageable(bool, HeapDumpAfterFullGC, false, \ 852 "Dump heap to file after any major stop-the-world GC") \ 853 \ 854 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 855 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 856 \ 857 manageable(ccstr, HeapDumpPath, NULL, \ 858 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 859 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 860 "in the working directory)") \ 861 \ 862 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 863 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 864 "when the heap usage is larger than this") \ 865 \ 866 develop(uintx, HeapDumpSegmentSize, 1*G, \ 867 "Approximate segment size when generating a segmented heap dump") \ 868 \ 869 develop(bool, BreakAtWarning, false, \ 870 "Execute breakpoint upon encountering VM warning") \ 871 \ 872 develop(bool, TraceVMOperation, false, \ 873 "Trace VM operations") \ 874 \ 875 develop(bool, UseFakeTimers, false, \ 876 "Tell whether the VM should use system time or a fake timer") \ 877 \ 878 product(ccstr, NativeMemoryTracking, "off", \ 879 "Native memory tracking options") \ 880 \ 881 diagnostic(bool, PrintNMTStatistics, false, \ 882 "Print native memory tracking summary data if it is on") \ 883 \ 884 diagnostic(bool, AutoShutdownNMT, true, \ 885 "Automatically shutdown native memory tracking under stress " \ 886 "situations. When set to false, native memory tracking tries to " \ 887 "stay alive at the expense of JVM performance") \ 888 \ 889 diagnostic(bool, LogCompilation, false, \ 890 "Log compilation activity in detail to LogFile") \ 891 \ 892 product(bool, PrintCompilation, false, \ 893 "Print compilations") \ 894 \ 895 diagnostic(bool, TraceNMethodInstalls, false, \ 896 "Trace nmethod installation") \ 897 \ 898 diagnostic(intx, ScavengeRootsInCode, 2, \ 899 "0: do not allow scavengable oops in the code cache; " \ 900 "1: allow scavenging from the code cache; " \ 901 "2: emit as many constants as the compiler can see") \ 902 \ 903 product(bool, AlwaysRestoreFPU, false, \ 904 "Restore the FPU control word after every JNI call (expensive)") \ 905 \ 906 diagnostic(bool, PrintCompilation2, false, \ 907 "Print additional statistics per compilation") \ 908 \ 909 diagnostic(bool, PrintAdapterHandlers, false, \ 910 "Print code generated for i2c/c2i adapters") \ 911 \ 912 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 913 "Verify that i2c/c2i adapters are called properly") \ 914 \ 915 develop(bool, VerifyAdapterSharing, false, \ 916 "Verify that the code for shared adapters is the equivalent") \ 917 \ 918 diagnostic(bool, PrintAssembly, false, \ 919 "Print assembly code (using external disassembler.so)") \ 920 \ 921 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 922 "Print options string passed to disassembler.so") \ 923 \ 924 diagnostic(bool, PrintNMethods, false, \ 925 "Print assembly code for nmethods when generated") \ 926 \ 927 diagnostic(bool, PrintNativeNMethods, false, \ 928 "Print assembly code for native nmethods when generated") \ 929 \ 930 develop(bool, PrintDebugInfo, false, \ 931 "Print debug information for all nmethods when generated") \ 932 \ 933 develop(bool, PrintRelocations, false, \ 934 "Print relocation information for all nmethods when generated") \ 935 \ 936 develop(bool, PrintDependencies, false, \ 937 "Print dependency information for all nmethods when generated") \ 938 \ 939 develop(bool, PrintExceptionHandlers, false, \ 940 "Print exception handler tables for all nmethods when generated") \ 941 \ 942 develop(bool, StressCompiledExceptionHandlers, false, \ 943 "Exercise compiled exception handlers") \ 944 \ 945 develop(bool, InterceptOSException, false, \ 946 "Start debugger when an implicit OS (e.g. NULL) " \ 947 "exception happens") \ 948 \ 949 product(bool, PrintCodeCache, false, \ 950 "Print the code cache memory usage when exiting") \ 951 \ 952 develop(bool, PrintCodeCache2, false, \ 953 "Print detailed usage information on the code cache when exiting")\ 954 \ 955 product(bool, PrintCodeCacheOnCompilation, false, \ 956 "Print the code cache memory usage each time a method is " \ 957 "compiled") \ 958 \ 959 diagnostic(bool, PrintStubCode, false, \ 960 "Print generated stub code") \ 961 \ 962 product(bool, StackTraceInThrowable, true, \ 963 "Collect backtrace in throwable when exception happens") \ 964 \ 965 product(bool, OmitStackTraceInFastThrow, true, \ 966 "Omit backtraces for some 'hot' exceptions in optimized code") \ 967 \ 968 product(bool, ProfilerPrintByteCodeStatistics, false, \ 969 "Print bytecode statistics when dumping profiler output") \ 970 \ 971 product(bool, ProfilerRecordPC, false, \ 972 "Collect ticks for each 16 byte interval of compiled code") \ 973 \ 974 product(bool, ProfileVM, false, \ 975 "Profile ticks that fall within VM (either in the VM Thread " \ 976 "or VM code called through stubs)") \ 977 \ 978 product(bool, ProfileIntervals, false, \ 979 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 980 \ 981 notproduct(bool, ProfilerCheckIntervals, false, \ 982 "Collect and print information on spacing of profiler ticks") \ 983 \ 984 develop(bool, PrintJVMWarnings, false, \ 985 "Print warnings for unimplemented JVM functions") \ 986 \ 987 product(bool, PrintWarnings, true, \ 988 "Print JVM warnings to output stream") \ 989 \ 990 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 991 "Print warnings for stalled SpinLocks") \ 992 \ 993 product(bool, RegisterFinalizersAtInit, true, \ 994 "Register finalizable objects at end of Object.<init> or " \ 995 "after allocation") \ 996 \ 997 develop(bool, RegisterReferences, true, \ 998 "Tell whether the VM should register soft/weak/final/phantom " \ 999 "references") \ 1000 \ 1001 develop(bool, IgnoreRewrites, false, \ 1002 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1003 "This is unsafe!") \ 1004 \ 1005 develop(bool, PrintCodeCacheExtension, false, \ 1006 "Print extension of code cache") \ 1007 \ 1008 develop(bool, UsePrivilegedStack, true, \ 1009 "Enable the security JVM functions") \ 1010 \ 1011 develop(bool, ProtectionDomainVerification, true, \ 1012 "Verify protection domain before resolution in system dictionary")\ 1013 \ 1014 product(bool, ClassUnloading, true, \ 1015 "Do unloading of classes") \ 1016 \ 1017 develop(bool, DisableStartThread, false, \ 1018 "Disable starting of additional Java threads " \ 1019 "(for debugging only)") \ 1020 \ 1021 develop(bool, MemProfiling, false, \ 1022 "Write memory usage profiling to log file") \ 1023 \ 1024 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1025 "Print the system dictionary at exit") \ 1026 \ 1027 experimental(intx, PredictedLoadedClassCount, 0, \ 1028 "Experimental: Tune loaded class cache starting size") \ 1029 \ 1030 diagnostic(bool, UnsyncloadClass, false, \ 1031 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1032 "class loader must call VM synchronized for findClass " \ 1033 "and defineClass.") \ 1034 \ 1035 product(bool, AlwaysLockClassLoader, false, \ 1036 "Require the VM to acquire the class loader lock before calling " \ 1037 "loadClass() even for class loaders registering " \ 1038 "as parallel capable") \ 1039 \ 1040 product(bool, AllowParallelDefineClass, false, \ 1041 "Allow parallel defineClass requests for class loaders " \ 1042 "registering as parallel capable") \ 1043 \ 1044 product(bool, MustCallLoadClassInternal, false, \ 1045 "Call loadClassInternal() rather than loadClass()") \ 1046 \ 1047 product_pd(bool, DontYieldALot, \ 1048 "Throw away obvious excess yield calls (for Solaris only)") \ 1049 \ 1050 product_pd(bool, ConvertSleepToYield, \ 1051 "Convert sleep(0) to thread yield " \ 1052 "(may be off for Solaris to improve GUI)") \ 1053 \ 1054 product(bool, ConvertYieldToSleep, false, \ 1055 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1056 "behavior (Solaris only)") \ 1057 \ 1058 product(bool, UseBoundThreads, true, \ 1059 "Bind user level threads to kernel threads (for Solaris only)") \ 1060 \ 1061 develop(bool, UseDetachedThreads, true, \ 1062 "Use detached threads that are recycled upon termination " \ 1063 "(for Solaris only)") \ 1064 \ 1065 product(bool, UseLWPSynchronization, true, \ 1066 "Use LWP-based instead of libthread-based synchronization " \ 1067 "(SPARC only)") \ 1068 \ 1069 product(ccstr, SyncKnobs, NULL, \ 1070 "(Unstable) Various monitor synchronization tunables") \ 1071 \ 1072 product(intx, EmitSync, 0, \ 1073 "(Unsafe, Unstable) " \ 1074 "Control emission of inline sync fast-path code") \ 1075 \ 1076 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1077 \ 1078 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1079 \ 1080 product(intx, SyncFlags, 0, "(Unsafe, Unstable) Experimental Sync flags") \ 1081 \ 1082 product(intx, SyncVerbose, 0, "(Unstable)") \ 1083 \ 1084 product(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1085 \ 1086 product(intx, hashCode, 5, \ 1087 "(Unstable) select hashCode generation algorithm") \ 1088 \ 1089 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1090 "(Unstable, Linux-specific) " \ 1091 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \ 1092 \ 1093 product(bool, FilterSpuriousWakeups, true, \ 1094 "Prevent spurious or premature wakeups from object.wait " \ 1095 "(Solaris only)") \ 1096 \ 1097 product(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1098 \ 1099 product(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1100 \ 1101 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1102 \ 1103 develop(bool, UsePthreads, false, \ 1104 "Use pthread-based instead of libthread-based synchronization " \ 1105 "(SPARC only)") \ 1106 \ 1107 product(bool, AdjustConcurrency, false, \ 1108 "Call thr_setconcurrency at thread creation time to avoid " \ 1109 "LWP starvation on MP systems (for Solaris Only)") \ 1110 \ 1111 product(bool, ReduceSignalUsage, false, \ 1112 "Reduce the use of OS signals in Java and/or the VM") \ 1113 \ 1114 develop_pd(bool, ShareVtableStubs, \ 1115 "Share vtable stubs (smaller code but worse branch prediction") \ 1116 \ 1117 develop(bool, LoadLineNumberTables, true, \ 1118 "Tell whether the class file parser loads line number tables") \ 1119 \ 1120 develop(bool, LoadLocalVariableTables, true, \ 1121 "Tell whether the class file parser loads local variable tables") \ 1122 \ 1123 develop(bool, LoadLocalVariableTypeTables, true, \ 1124 "Tell whether the class file parser loads local variable type" \ 1125 "tables") \ 1126 \ 1127 product(bool, AllowUserSignalHandlers, false, \ 1128 "Do not complain if the application installs signal handlers " \ 1129 "(Solaris & Linux only)") \ 1130 \ 1131 product(bool, UseSignalChaining, true, \ 1132 "Use signal-chaining to invoke signal handlers installed " \ 1133 "by the application (Solaris & Linux only)") \ 1134 \ 1135 product(bool, UseAltSigs, false, \ 1136 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1137 "internal signals (Solaris only)") \ 1138 \ 1139 product(bool, AllowJNIEnvProxy, false, \ 1140 "Allow JNIEnv proxies for jdbx") \ 1141 \ 1142 product(bool, JNIDetachReleasesMonitors, true, \ 1143 "JNI DetachCurrentThread releases monitors owned by thread") \ 1144 \ 1145 product(bool, RestoreMXCSROnJNICalls, false, \ 1146 "Restore MXCSR when returning from JNI calls") \ 1147 \ 1148 product(bool, CheckJNICalls, false, \ 1149 "Verify all arguments to JNI calls") \ 1150 \ 1151 product(bool, UseFastJNIAccessors, true, \ 1152 "Use optimized versions of Get<Primitive>Field") \ 1153 \ 1154 product(bool, EagerXrunInit, false, \ 1155 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1156 "but not all -Xrun libraries may support the state of the VM " \ 1157 "at this time") \ 1158 \ 1159 product(bool, PreserveAllAnnotations, false, \ 1160 "Preserve RuntimeInvisibleAnnotations as well " \ 1161 "as RuntimeVisibleAnnotations") \ 1162 \ 1163 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1164 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1165 \ 1166 product(bool, LazyBootClassLoader, true, \ 1167 "Enable/disable lazy opening of boot class path entries") \ 1168 \ 1169 product(bool, UseXMMForArrayCopy, false, \ 1170 "Use SSE2 MOVQ instruction for Arraycopy") \ 1171 \ 1172 product(intx, FieldsAllocationStyle, 1, \ 1173 "0 - type based with oops first, 1 - with oops last, " \ 1174 "2 - oops in super and sub classes are together") \ 1175 \ 1176 product(bool, CompactFields, true, \ 1177 "Allocate nonstatic fields in gaps between previous fields") \ 1178 \ 1179 notproduct(bool, PrintFieldLayout, false, \ 1180 "Print field layout for each class") \ 1181 \ 1182 product(intx, ContendedPaddingWidth, 128, \ 1183 "How many bytes to pad the fields/classes marked @Contended with")\ 1184 \ 1185 product(bool, EnableContended, true, \ 1186 "Enable @Contended annotation support") \ 1187 \ 1188 product(bool, RestrictContended, true, \ 1189 "Restrict @Contended to trusted classes") \ 1190 \ 1191 product(bool, UseBiasedLocking, true, \ 1192 "Enable biased locking in JVM") \ 1193 \ 1194 product(intx, BiasedLockingStartupDelay, 4000, \ 1195 "Number of milliseconds to wait before enabling biased locking") \ 1196 \ 1197 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1198 "Print statistics of biased locking in JVM") \ 1199 \ 1200 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1201 "Threshold of number of revocations per type to try to " \ 1202 "rebias all objects in the heap of that type") \ 1203 \ 1204 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1205 "Threshold of number of revocations per type to permanently " \ 1206 "revoke biases of all objects in the heap of that type") \ 1207 \ 1208 product(intx, BiasedLockingDecayTime, 25000, \ 1209 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1210 "type after previous bulk rebias") \ 1211 \ 1212 /* tracing */ \ 1213 \ 1214 notproduct(bool, TraceRuntimeCalls, false, \ 1215 "Trace run-time calls") \ 1216 \ 1217 develop(bool, TraceJNICalls, false, \ 1218 "Trace JNI calls") \ 1219 \ 1220 notproduct(bool, TraceJVMCalls, false, \ 1221 "Trace JVM calls") \ 1222 \ 1223 product(ccstr, TraceJVMTI, NULL, \ 1224 "Trace flags for JVMTI functions and events") \ 1225 \ 1226 /* This option can change an EMCP method into an obsolete method. */ \ 1227 /* This can affect tests that except specific methods to be EMCP. */ \ 1228 /* This option should be used with caution. */ \ 1229 product(bool, StressLdcRewrite, false, \ 1230 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1231 \ 1232 product(intx, TraceRedefineClasses, 0, \ 1233 "Trace level for JVMTI RedefineClasses") \ 1234 \ 1235 develop(bool, StressMethodComparator, false, \ 1236 "Run the MethodComparator on all loaded methods") \ 1237 \ 1238 /* change to false by default sometime after Mustang */ \ 1239 product(bool, VerifyMergedCPBytecodes, true, \ 1240 "Verify bytecodes after RedefineClasses constant pool merging") \ 1241 \ 1242 develop(bool, TraceJNIHandleAllocation, false, \ 1243 "Trace allocation/deallocation of JNI handle blocks") \ 1244 \ 1245 develop(bool, TraceThreadEvents, false, \ 1246 "Trace all thread events") \ 1247 \ 1248 develop(bool, TraceBytecodes, false, \ 1249 "Trace bytecode execution") \ 1250 \ 1251 develop(bool, TraceClassInitialization, false, \ 1252 "Trace class initialization") \ 1253 \ 1254 develop(bool, TraceExceptions, false, \ 1255 "Trace exceptions") \ 1256 \ 1257 develop(bool, TraceICs, false, \ 1258 "Trace inline cache changes") \ 1259 \ 1260 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1261 "Trace method invocation counter overflow") \ 1262 \ 1263 develop(bool, TraceInlineCacheClearing, false, \ 1264 "Trace clearing of inline caches in nmethods") \ 1265 \ 1266 develop(bool, TraceDependencies, false, \ 1267 "Trace dependencies") \ 1268 \ 1269 develop(bool, VerifyDependencies, trueInDebug, \ 1270 "Exercise and verify the compilation dependency mechanism") \ 1271 \ 1272 develop(bool, TraceNewOopMapGeneration, false, \ 1273 "Trace OopMapGeneration") \ 1274 \ 1275 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1276 "Trace OopMapGeneration: print detailed cell states") \ 1277 \ 1278 develop(bool, TimeOopMap, false, \ 1279 "Time calls to GenerateOopMap::compute_map() in sum") \ 1280 \ 1281 develop(bool, TimeOopMap2, false, \ 1282 "Time calls to GenerateOopMap::compute_map() individually") \ 1283 \ 1284 develop(bool, TraceMonitorMismatch, false, \ 1285 "Trace monitor matching failures during OopMapGeneration") \ 1286 \ 1287 develop(bool, TraceOopMapRewrites, false, \ 1288 "Trace rewriting of method oops during oop map generation") \ 1289 \ 1290 develop(bool, TraceSafepoint, false, \ 1291 "Trace safepoint operations") \ 1292 \ 1293 develop(bool, TraceICBuffer, false, \ 1294 "Trace usage of IC buffer") \ 1295 \ 1296 develop(bool, TraceCompiledIC, false, \ 1297 "Trace changes of compiled IC") \ 1298 \ 1299 notproduct(bool, TraceZapDeadLocals, false, \ 1300 "Trace zapping dead locals") \ 1301 \ 1302 develop(bool, TraceStartupTime, false, \ 1303 "Trace setup time") \ 1304 \ 1305 develop(bool, TraceProtectionDomainVerification, false, \ 1306 "Trace protection domain verification") \ 1307 \ 1308 develop(bool, TraceClearedExceptions, false, \ 1309 "Print when an exception is forcibly cleared") \ 1310 \ 1311 product(bool, TraceClassResolution, false, \ 1312 "Trace all constant pool resolutions (for debugging)") \ 1313 \ 1314 product(bool, TraceBiasedLocking, false, \ 1315 "Trace biased locking in JVM") \ 1316 \ 1317 product(bool, TraceMonitorInflation, false, \ 1318 "Trace monitor inflation in JVM") \ 1319 \ 1320 /* gc */ \ 1321 \ 1322 product(bool, UseSerialGC, false, \ 1323 "Use the Serial garbage collector") \ 1324 \ 1325 product(bool, UseG1GC, false, \ 1326 "Use the Garbage-First garbage collector") \ 1327 \ 1328 product(bool, UseParallelGC, false, \ 1329 "Use the Parallel Scavenge garbage collector") \ 1330 \ 1331 product(bool, UseParallelOldGC, false, \ 1332 "Use the Parallel Old garbage collector") \ 1333 \ 1334 product(uintx, HeapMaximumCompactionInterval, 20, \ 1335 "How often should we maximally compact the heap (not allowing " \ 1336 "any dead space)") \ 1337 \ 1338 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1339 "The collection count for the first maximum compaction") \ 1340 \ 1341 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1342 "Use maximum compaction in the Parallel Old garbage collector " \ 1343 "for a system GC") \ 1344 \ 1345 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1346 "The mean used by the parallel compact dead wood " \ 1347 "limiter (a number between 0-100)") \ 1348 \ 1349 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1350 "The standard deviation used by the parallel compact dead wood " \ 1351 "limiter (a number between 0-100)") \ 1352 \ 1353 product(uintx, ParallelGCThreads, 0, \ 1354 "Number of parallel threads parallel gc will use") \ 1355 \ 1356 product(bool, UseDynamicNumberOfGCThreads, false, \ 1357 "Dynamically choose the number of parallel threads " \ 1358 "parallel gc will use") \ 1359 \ 1360 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1361 "Force dynamic selection of the number of " \ 1362 "parallel threads parallel gc will use to aid debugging") \ 1363 \ 1364 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1365 "Size of heap (bytes) per GC thread used in calculating the " \ 1366 "number of GC threads") \ 1367 \ 1368 product(bool, TraceDynamicGCThreads, false, \ 1369 "Trace the dynamic GC thread usage") \ 1370 \ 1371 develop(bool, ParallelOldGCSplitALot, false, \ 1372 "Provoke splitting (copying data from a young gen space to " \ 1373 "multiple destination spaces)") \ 1374 \ 1375 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1376 "How often to provoke splitting a young gen space") \ 1377 \ 1378 product(uintx, ConcGCThreads, 0, \ 1379 "Number of threads concurrent gc will use") \ 1380 \ 1381 product(uintx, YoungPLABSize, 4096, \ 1382 "Size of young gen promotion LAB's (in HeapWords)") \ 1383 \ 1384 product(uintx, OldPLABSize, 1024, \ 1385 "Size of old gen promotion LAB's (in HeapWords)") \ 1386 \ 1387 product(uintx, GCTaskTimeStampEntries, 200, \ 1388 "Number of time stamp entries per gc worker thread") \ 1389 \ 1390 product(bool, AlwaysTenure, false, \ 1391 "Always tenure objects in eden (ParallelGC only)") \ 1392 \ 1393 product(bool, NeverTenure, false, \ 1394 "Never tenure objects in eden, may tenure on overflow " \ 1395 "(ParallelGC only)") \ 1396 \ 1397 product(bool, ScavengeBeforeFullGC, true, \ 1398 "Scavenge youngest generation before each full GC, " \ 1399 "used with UseParallelGC") \ 1400 \ 1401 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1402 "Allow scavenges to occur when to-space contains objects") \ 1403 \ 1404 product(bool, UseConcMarkSweepGC, false, \ 1405 "Use Concurrent Mark-Sweep GC in the old generation") \ 1406 \ 1407 product(bool, ExplicitGCInvokesConcurrent, false, \ 1408 "A System.gc() request invokes a concurrent collection; " \ 1409 "(effective only when UseConcMarkSweepGC)") \ 1410 \ 1411 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1412 "A System.gc() request invokes a concurrent collection and " \ 1413 "also unloads classes during such a concurrent gc cycle " \ 1414 "(effective only when UseConcMarkSweepGC)") \ 1415 \ 1416 product(bool, GCLockerInvokesConcurrent, false, \ 1417 "The exit of a JNI critical section necessitating a scavenge, " \ 1418 "also kicks off a background concurrent collection") \ 1419 \ 1420 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1421 "How much the GC can expand the eden by while the GC locker " \ 1422 "is active (as a percentage)") \ 1423 \ 1424 diagnostic(intx, GCLockerRetryAllocationCount, 2, \ 1425 "Number of times to retry allocations when " \ 1426 "blocked by the GC locker") \ 1427 \ 1428 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1429 "Use adaptive free lists in the CMS generation") \ 1430 \ 1431 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1432 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1433 \ 1434 develop(bool, RotateCMSCollectionTypes, false, \ 1435 "Rotate the CMS collections among concurrent and STW") \ 1436 \ 1437 product(bool, UseCMSBestFit, true, \ 1438 "Use CMS best fit allocation strategy") \ 1439 \ 1440 product(bool, UseCMSCollectionPassing, true, \ 1441 "Use passing of collection from background to foreground") \ 1442 \ 1443 product(bool, UseParNewGC, false, \ 1444 "Use parallel threads in the new generation") \ 1445 \ 1446 product(bool, ParallelGCVerbose, false, \ 1447 "Verbose output for parallel gc") \ 1448 \ 1449 product(uintx, ParallelGCBufferWastePct, 10, \ 1450 "Wasted fraction of parallel allocation buffer") \ 1451 \ 1452 diagnostic(bool, ParallelGCRetainPLAB, false, \ 1453 "Retain parallel allocation buffers across scavenges; " \ 1454 "it is disabled because this currently conflicts with " \ 1455 "parallel card scanning under certain conditions.") \ 1456 \ 1457 product(uintx, TargetPLABWastePct, 10, \ 1458 "Target wasted space in last buffer as percent of overall " \ 1459 "allocation") \ 1460 \ 1461 product(uintx, PLABWeight, 75, \ 1462 "Percentage (0-100) used to weigh the current sample when " \ 1463 "computing exponentially decaying average for ResizePLAB") \ 1464 \ 1465 product(bool, ResizePLAB, true, \ 1466 "Dynamically resize (survivor space) promotion LAB's") \ 1467 \ 1468 product(bool, PrintPLAB, false, \ 1469 "Print (survivor space) promotion LAB's sizing decisions") \ 1470 \ 1471 product(intx, ParGCArrayScanChunk, 50, \ 1472 "Scan a subset of object array and push remainder, if array is " \ 1473 "bigger than this") \ 1474 \ 1475 product(bool, ParGCUseLocalOverflow, false, \ 1476 "Instead of a global overflow list, use local overflow stacks") \ 1477 \ 1478 product(bool, ParGCTrimOverflow, true, \ 1479 "Eagerly trim the local overflow lists " \ 1480 "(when ParGCUseLocalOverflow)") \ 1481 \ 1482 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1483 "Simulate work queue overflow in ParNew") \ 1484 \ 1485 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1486 "An `interval' counter that determines how frequently " \ 1487 "we simulate overflow; a smaller number increases frequency") \ 1488 \ 1489 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1490 "The desired number of objects to claim from the overflow list") \ 1491 \ 1492 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1493 "The number of strides per worker thread that we divide up the " \ 1494 "card table scanning work into") \ 1495 \ 1496 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1497 "The number of cards in each chunk of the parallel chunks used " \ 1498 "during card table scanning") \ 1499 \ 1500 product(uintx, CMSParPromoteBlocksToClaim, 16, \ 1501 "Number of blocks to attempt to claim when refilling CMS LAB's " \ 1502 "for parallel GC") \ 1503 \ 1504 product(uintx, OldPLABWeight, 50, \ 1505 "Percentage (0-100) used to weight the current sample when " \ 1506 "computing exponentially decaying average for resizing " \ 1507 "CMSParPromoteBlocksToClaim") \ 1508 \ 1509 product(bool, ResizeOldPLAB, true, \ 1510 "Dynamically resize (old gen) promotion LAB's") \ 1511 \ 1512 product(bool, PrintOldPLAB, false, \ 1513 "Print (old gen) promotion LAB's sizing decisions") \ 1514 \ 1515 product(uintx, CMSOldPLABMin, 16, \ 1516 "Minimum size of CMS gen promotion LAB caches per worker " \ 1517 "per block size") \ 1518 \ 1519 product(uintx, CMSOldPLABMax, 1024, \ 1520 "Maximum size of CMS gen promotion LAB caches per worker " \ 1521 "per block size") \ 1522 \ 1523 product(uintx, CMSOldPLABNumRefills, 4, \ 1524 "Nominal number of refills of CMS gen promotion LAB cache " \ 1525 "per worker per block size") \ 1526 \ 1527 product(bool, CMSOldPLABResizeQuicker, false, \ 1528 "React on-the-fly during a scavenge to a sudden " \ 1529 "change in block demand rate") \ 1530 \ 1531 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1532 "The tolerance of the phase-change detector for on-the-fly " \ 1533 "PLAB resizing during a scavenge") \ 1534 \ 1535 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1536 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1537 "during a scavenge") \ 1538 \ 1539 product(bool, AlwaysPreTouch, false, \ 1540 "Force all freshly committed pages to be pre-touched") \ 1541 \ 1542 product_pd(uintx, CMSYoungGenPerWorker, \ 1543 "The maximum size of young gen chosen by default per GC worker " \ 1544 "thread available") \ 1545 \ 1546 product(bool, CMSIncrementalMode, false, \ 1547 "Whether CMS GC should operate in \"incremental\" mode") \ 1548 \ 1549 product(uintx, CMSIncrementalDutyCycle, 10, \ 1550 "Percentage (0-100) of CMS incremental mode duty cycle. If " \ 1551 "CMSIncrementalPacing is enabled, then this is just the initial " \ 1552 "value.") \ 1553 \ 1554 product(bool, CMSIncrementalPacing, true, \ 1555 "Whether the CMS incremental mode duty cycle should be " \ 1556 "automatically adjusted") \ 1557 \ 1558 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1559 "Minimum percentage (0-100) of the CMS incremental duty cycle " \ 1560 "used when CMSIncrementalPacing is enabled") \ 1561 \ 1562 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1563 "Percentage (0-100) used to add conservatism when computing the " \ 1564 "duty cycle") \ 1565 \ 1566 product(uintx, CMSIncrementalOffset, 0, \ 1567 "Percentage (0-100) by which the CMS incremental mode duty cycle "\ 1568 "is shifted to the right within the period between young GCs") \ 1569 \ 1570 product(uintx, CMSExpAvgFactor, 50, \ 1571 "Percentage (0-100) used to weigh the current sample when " \ 1572 "computing exponential averages for CMS statistics") \ 1573 \ 1574 product(uintx, CMS_FLSWeight, 75, \ 1575 "Percentage (0-100) used to weigh the current sample when " \ 1576 "computing exponentially decaying averages for CMS FLS " \ 1577 "statistics") \ 1578 \ 1579 product(uintx, CMS_FLSPadding, 1, \ 1580 "The multiple of deviation from mean to use for buffering " \ 1581 "against volatility in free list demand") \ 1582 \ 1583 product(uintx, FLSCoalescePolicy, 2, \ 1584 "CMS: aggressiveness level for coalescing, increasing " \ 1585 "from 0 to 4") \ 1586 \ 1587 product(bool, FLSAlwaysCoalesceLarge, false, \ 1588 "CMS: larger free blocks are always available for coalescing") \ 1589 \ 1590 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1591 "CMS: the smaller the percentage the greater the coalescing " \ 1592 "force") \ 1593 \ 1594 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1595 "CMS: the factor by which to inflate estimated demand of small " \ 1596 "block sizes to prevent coalescing with an adjoining block") \ 1597 \ 1598 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1599 "CMS: the factor by which to inflate estimated demand of large " \ 1600 "block sizes to prevent coalescing with an adjoining block") \ 1601 \ 1602 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1603 "CMS: the factor by which to inflate estimated demand of small " \ 1604 "block sizes to prevent splitting to supply demand for smaller " \ 1605 "blocks") \ 1606 \ 1607 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1608 "CMS: the factor by which to inflate estimated demand of large " \ 1609 "block sizes to prevent splitting to supply demand for smaller " \ 1610 "blocks") \ 1611 \ 1612 product(bool, CMSExtrapolateSweep, false, \ 1613 "CMS: cushion for block demand during sweep") \ 1614 \ 1615 product(uintx, CMS_SweepWeight, 75, \ 1616 "Percentage (0-100) used to weight the current sample when " \ 1617 "computing exponentially decaying average for inter-sweep " \ 1618 "duration") \ 1619 \ 1620 product(uintx, CMS_SweepPadding, 1, \ 1621 "The multiple of deviation from mean to use for buffering " \ 1622 "against volatility in inter-sweep duration") \ 1623 \ 1624 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1625 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1626 "duration exceeds this threshold in milliseconds") \ 1627 \ 1628 develop(bool, CMSTraceIncrementalMode, false, \ 1629 "Trace CMS incremental mode") \ 1630 \ 1631 develop(bool, CMSTraceIncrementalPacing, false, \ 1632 "Trace CMS incremental mode pacing computation") \ 1633 \ 1634 develop(bool, CMSTraceThreadState, false, \ 1635 "Trace the CMS thread state (enable the trace_state() method)") \ 1636 \ 1637 product(bool, CMSClassUnloadingEnabled, true, \ 1638 "Whether class unloading enabled when using CMS GC") \ 1639 \ 1640 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1641 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1642 "count for which classes may not be unloaded") \ 1643 \ 1644 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1645 "Compact when asked to collect CMS gen with " \ 1646 "clear_all_soft_refs()") \ 1647 \ 1648 product(bool, UseCMSCompactAtFullCollection, true, \ 1649 "Use Mark-Sweep-Compact algorithm at full collections") \ 1650 \ 1651 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1652 "Number of CMS full collection done before compaction if > 0") \ 1653 \ 1654 develop(intx, CMSDictionaryChoice, 0, \ 1655 "Use BinaryTreeDictionary as default in the CMS generation") \ 1656 \ 1657 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1658 "Replenish an indexed free list with this number of chunks") \ 1659 \ 1660 product(bool, CMSReplenishIntermediate, true, \ 1661 "Replenish all intermediate free-list caches") \ 1662 \ 1663 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1664 "When satisfying batched demand, split blocks from the " \ 1665 "IndexedFreeList whose size is a multiple of requested size") \ 1666 \ 1667 product(bool, CMSLoopWarn, false, \ 1668 "Warn in case of excessive CMS looping") \ 1669 \ 1670 develop(bool, CMSOverflowEarlyRestoration, false, \ 1671 "Restore preserved marks early") \ 1672 \ 1673 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1674 "Size of marking stack") \ 1675 \ 1676 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1677 "Maximum size of marking stack") \ 1678 \ 1679 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1680 "Simulate frequent marking stack / work queue overflow") \ 1681 \ 1682 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1683 "An \"interval\" counter that determines how frequently " \ 1684 "to simulate overflow; a smaller number increases frequency") \ 1685 \ 1686 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1687 "(Temporary, subject to experimentation) " \ 1688 "Maximum number of abortable preclean iterations, if > 0") \ 1689 \ 1690 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1691 "(Temporary, subject to experimentation) " \ 1692 "Maximum time in abortable preclean (in milliseconds)") \ 1693 \ 1694 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1695 "(Temporary, subject to experimentation) " \ 1696 "Nominal minimum work per abortable preclean iteration") \ 1697 \ 1698 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1699 "(Temporary, subject to experimentation) " \ 1700 "Time that we sleep between iterations when not given " \ 1701 "enough work per iteration") \ 1702 \ 1703 product(uintx, CMSRescanMultiple, 32, \ 1704 "Size (in cards) of CMS parallel rescan task") \ 1705 \ 1706 product(uintx, CMSConcMarkMultiple, 32, \ 1707 "Size (in cards) of CMS concurrent MT marking task") \ 1708 \ 1709 product(bool, CMSAbortSemantics, false, \ 1710 "Whether abort-on-overflow semantics is implemented") \ 1711 \ 1712 product(bool, CMSParallelInitialMarkEnabled, true, \ 1713 "Use the parallel initial mark.") \ 1714 \ 1715 product(bool, CMSParallelRemarkEnabled, true, \ 1716 "Whether parallel remark enabled (only if ParNewGC)") \ 1717 \ 1718 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1719 "Whether parallel remark of survivor space " \ 1720 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1721 \ 1722 product(bool, CMSPLABRecordAlways, true, \ 1723 "Always record survivor space PLAB boundaries (effective only " \ 1724 "if CMSParallelSurvivorRemarkEnabled)") \ 1725 \ 1726 product(bool, CMSEdenChunksRecordAlways, true, \ 1727 "Always record eden chunks used for the parallel initial mark " \ 1728 "or remark of eden") \ 1729 \ 1730 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1731 "Print the eden and the survivor chunks used for the parallel " \ 1732 "initial mark or remark of the eden/survivor spaces") \ 1733 \ 1734 product(bool, CMSConcurrentMTEnabled, true, \ 1735 "Whether multi-threaded concurrent work enabled " \ 1736 "(effective only if ParNewGC)") \ 1737 \ 1738 product(bool, CMSPrecleaningEnabled, true, \ 1739 "Whether concurrent precleaning enabled") \ 1740 \ 1741 product(uintx, CMSPrecleanIter, 3, \ 1742 "Maximum number of precleaning iteration passes") \ 1743 \ 1744 product(uintx, CMSPrecleanNumerator, 2, \ 1745 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1746 "ratio") \ 1747 \ 1748 product(uintx, CMSPrecleanDenominator, 3, \ 1749 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1750 "ratio") \ 1751 \ 1752 product(bool, CMSPrecleanRefLists1, true, \ 1753 "Preclean ref lists during (initial) preclean phase") \ 1754 \ 1755 product(bool, CMSPrecleanRefLists2, false, \ 1756 "Preclean ref lists during abortable preclean phase") \ 1757 \ 1758 product(bool, CMSPrecleanSurvivors1, false, \ 1759 "Preclean survivors during (initial) preclean phase") \ 1760 \ 1761 product(bool, CMSPrecleanSurvivors2, true, \ 1762 "Preclean survivors during abortable preclean phase") \ 1763 \ 1764 product(uintx, CMSPrecleanThreshold, 1000, \ 1765 "Do not iterate again if number of dirty cards is less than this")\ 1766 \ 1767 product(bool, CMSCleanOnEnter, true, \ 1768 "Clean-on-enter optimization for reducing number of dirty cards") \ 1769 \ 1770 product(uintx, CMSRemarkVerifyVariant, 1, \ 1771 "Choose variant (1,2) of verification following remark") \ 1772 \ 1773 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1774 "If Eden size is below this, do not try to schedule remark") \ 1775 \ 1776 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1777 "The Eden occupancy percentage (0-100) at which " \ 1778 "to try and schedule remark pause") \ 1779 \ 1780 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1781 "Start sampling eden top at least before young gen " \ 1782 "occupancy reaches 1/<ratio> of the size at which " \ 1783 "we plan to schedule remark") \ 1784 \ 1785 product(uintx, CMSSamplingGrain, 16*K, \ 1786 "The minimum distance between eden samples for CMS (see above)") \ 1787 \ 1788 product(bool, CMSScavengeBeforeRemark, false, \ 1789 "Attempt scavenge before the CMS remark step") \ 1790 \ 1791 develop(bool, CMSTraceSweeper, false, \ 1792 "Trace some actions of the CMS sweeper") \ 1793 \ 1794 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1795 "Don't drain below this size per parallel worker/thief") \ 1796 \ 1797 manageable(intx, CMSWaitDuration, 2000, \ 1798 "Time in milliseconds that CMS thread waits for young GC") \ 1799 \ 1800 develop(uintx, CMSCheckInterval, 1000, \ 1801 "Interval in milliseconds that CMS thread checks if it " \ 1802 "should start a collection cycle") \ 1803 \ 1804 product(bool, CMSYield, true, \ 1805 "Yield between steps of CMS") \ 1806 \ 1807 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1808 "Bitmap operations should process at most this many bits " \ 1809 "between yields") \ 1810 \ 1811 product(bool, CMSDumpAtPromotionFailure, false, \ 1812 "Dump useful information about the state of the CMS old " \ 1813 "generation upon a promotion failure") \ 1814 \ 1815 product(bool, CMSPrintChunksInDump, false, \ 1816 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1817 "more detailed information about the free chunks") \ 1818 \ 1819 product(bool, CMSPrintObjectsInDump, false, \ 1820 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1821 "more detailed information about the allocated objects") \ 1822 \ 1823 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1824 "Verify that all references across the FLS boundary " \ 1825 "are to valid objects") \ 1826 \ 1827 diagnostic(bool, FLSVerifyLists, false, \ 1828 "Do lots of (expensive) FreeListSpace verification") \ 1829 \ 1830 diagnostic(bool, FLSVerifyIndexTable, false, \ 1831 "Do lots of (expensive) FLS index table verification") \ 1832 \ 1833 develop(bool, FLSVerifyDictionary, false, \ 1834 "Do lots of (expensive) FLS dictionary verification") \ 1835 \ 1836 develop(bool, VerifyBlockOffsetArray, false, \ 1837 "Do (expensive) block offset array verification") \ 1838 \ 1839 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1840 "Maintain _unallocated_block in BlockOffsetArray " \ 1841 "(currently applicable only to CMS collector)") \ 1842 \ 1843 develop(bool, TraceCMSState, false, \ 1844 "Trace the state of the CMS collection") \ 1845 \ 1846 product(intx, RefDiscoveryPolicy, 0, \ 1847 "Select type of reference discovery policy: " \ 1848 "reference-based(0) or referent-based(1)") \ 1849 \ 1850 product(bool, ParallelRefProcEnabled, false, \ 1851 "Enable parallel reference processing whenever possible") \ 1852 \ 1853 product(bool, ParallelRefProcBalancingEnabled, true, \ 1854 "Enable balancing of reference processing queues") \ 1855 \ 1856 product(uintx, CMSTriggerRatio, 80, \ 1857 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1858 "allocated before a CMS collection cycle commences") \ 1859 \ 1860 product(uintx, CMSBootstrapOccupancy, 50, \ 1861 "Percentage CMS generation occupancy at which to " \ 1862 "initiate CMS collection for bootstrapping collection stats") \ 1863 \ 1864 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1865 "Percentage CMS generation occupancy to start a CMS collection " \ 1866 "cycle. A negative value means that CMSTriggerRatio is used") \ 1867 \ 1868 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1869 "Percentage of the (entire) heap occupancy to start a " \ 1870 "concurrent GC cycle. It is used by GCs that trigger a " \ 1871 "concurrent GC cycle based on the occupancy of the entire heap, " \ 1872 "not just one of the generations (e.g., G1). A value of 0 " \ 1873 "denotes 'do constant GC cycles'.") \ 1874 \ 1875 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1876 "Only use occupancy as a criterion for starting a CMS collection")\ 1877 \ 1878 product(uintx, CMSIsTooFullPercentage, 98, \ 1879 "An absolute ceiling above which CMS will always consider the " \ 1880 "unloading of classes when class unloading is enabled") \ 1881 \ 1882 develop(bool, CMSTestInFreeList, false, \ 1883 "Check if the coalesced range is already in the " \ 1884 "free lists as claimed") \ 1885 \ 1886 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1887 "Check that all the garbage collected was returned to the " \ 1888 "free lists") \ 1889 \ 1890 notproduct(bool, ScavengeALot, false, \ 1891 "Force scavenge at every Nth exit from the runtime system " \ 1892 "(N=ScavengeALotInterval)") \ 1893 \ 1894 develop(bool, FullGCALot, false, \ 1895 "Force full gc at every Nth exit from the runtime system " \ 1896 "(N=FullGCALotInterval)") \ 1897 \ 1898 notproduct(bool, GCALotAtAllSafepoints, false, \ 1899 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1900 \ 1901 product(bool, PrintPromotionFailure, false, \ 1902 "Print additional diagnostic information following " \ 1903 "promotion failure") \ 1904 \ 1905 notproduct(bool, PromotionFailureALot, false, \ 1906 "Use promotion failure handling on every youngest generation " \ 1907 "collection") \ 1908 \ 1909 develop(uintx, PromotionFailureALotCount, 1000, \ 1910 "Number of promotion failures occurring at ParGCAllocBuffer " \ 1911 "refill attempts (ParNew) or promotion attempts " \ 1912 "(other young collectors)") \ 1913 \ 1914 develop(uintx, PromotionFailureALotInterval, 5, \ 1915 "Total collections between promotion failures alot") \ 1916 \ 1917 experimental(uintx, WorkStealingSleepMillis, 1, \ 1918 "Sleep time when sleep is used for yields") \ 1919 \ 1920 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 1921 "Number of yields before a sleep is done during workstealing") \ 1922 \ 1923 experimental(uintx, WorkStealingHardSpins, 4096, \ 1924 "Number of iterations in a spin loop between checks on " \ 1925 "time out of hard spin") \ 1926 \ 1927 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 1928 "Ratio of hard spins to calls to yield") \ 1929 \ 1930 develop(uintx, ObjArrayMarkingStride, 512, \ 1931 "Number of object array elements to push onto the marking stack " \ 1932 "before pushing a continuation entry") \ 1933 \ 1934 develop(bool, MetadataAllocationFailALot, false, \ 1935 "Fail metadata allocations at intervals controlled by " \ 1936 "MetadataAllocationFailALotInterval") \ 1937 \ 1938 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 1939 "Metadata allocation failure a lot interval") \ 1940 \ 1941 develop(bool, MetaDataDeallocateALot, false, \ 1942 "Deallocation bunches of metadata at intervals controlled by " \ 1943 "MetaDataAllocateALotInterval") \ 1944 \ 1945 develop(uintx, MetaDataDeallocateALotInterval, 100, \ 1946 "Metadata deallocation alot interval") \ 1947 \ 1948 develop(bool, TraceMetadataChunkAllocation, false, \ 1949 "Trace chunk metadata allocations") \ 1950 \ 1951 product(bool, TraceMetadataHumongousAllocation, false, \ 1952 "Trace humongous metadata allocations") \ 1953 \ 1954 develop(bool, TraceMetavirtualspaceAllocation, false, \ 1955 "Trace virtual space metadata allocations") \ 1956 \ 1957 notproduct(bool, ExecuteInternalVMTests, false, \ 1958 "Enable execution of internal VM tests") \ 1959 \ 1960 notproduct(bool, VerboseInternalVMTests, false, \ 1961 "Turn on logging for internal VM tests.") \ 1962 \ 1963 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1964 \ 1965 product_pd(bool, ResizeTLAB, \ 1966 "Dynamically resize TLAB size for threads") \ 1967 \ 1968 product(bool, ZeroTLAB, false, \ 1969 "Zero out the newly created TLAB") \ 1970 \ 1971 product(bool, FastTLABRefill, true, \ 1972 "Use fast TLAB refill code") \ 1973 \ 1974 product(bool, PrintTLAB, false, \ 1975 "Print various TLAB related information") \ 1976 \ 1977 product(bool, TLABStats, true, \ 1978 "Provide more detailed and expensive TLAB statistics " \ 1979 "(with PrintTLAB)") \ 1980 \ 1981 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 1982 "Enable LowMemoryProtection")) \ 1983 \ 1984 product_pd(bool, NeverActAsServerClassMachine, \ 1985 "Never act like a server-class machine") \ 1986 \ 1987 product(bool, AlwaysActAsServerClassMachine, false, \ 1988 "Always act like a server-class machine") \ 1989 \ 1990 product_pd(uint64_t, MaxRAM, \ 1991 "Real memory size (in bytes) used to set maximum heap size") \ 1992 \ 1993 product(uintx, ErgoHeapSizeLimit, 0, \ 1994 "Maximum ergonomically set heap size (in bytes); zero means use " \ 1995 "MaxRAM / MaxRAMFraction") \ 1996 \ 1997 product(uintx, MaxRAMFraction, 4, \ 1998 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1999 "size") \ 2000 \ 2001 product(uintx, DefaultMaxRAMFraction, 4, \ 2002 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2003 "size; deprecated: to be renamed to MaxRAMFraction") \ 2004 \ 2005 product(uintx, MinRAMFraction, 2, \ 2006 "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 2007 "size on systems with small physical memory size") \ 2008 \ 2009 product(uintx, InitialRAMFraction, 64, \ 2010 "Fraction (1/n) of real memory used for initial heap size") \ 2011 \ 2012 develop(uintx, MaxVirtMemFraction, 2, \ 2013 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2014 "determining maximum heap size") \ 2015 \ 2016 product(bool, UseAutoGCSelectPolicy, false, \ 2017 "Use automatic collection selection policy") \ 2018 \ 2019 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2020 "Automatic GC selection pause threshold in milliseconds") \ 2021 \ 2022 product(bool, UseAdaptiveSizePolicy, true, \ 2023 "Use adaptive generation sizing policies") \ 2024 \ 2025 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2026 "Use adaptive survivor sizing policies") \ 2027 \ 2028 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2029 "Use adaptive young-old sizing policies at minor collections") \ 2030 \ 2031 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2032 "Use adaptive young-old sizing policies at major collections") \ 2033 \ 2034 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2035 "Include statistics from System.gc() for adaptive size policy") \ 2036 \ 2037 product(bool, UseAdaptiveGCBoundary, false, \ 2038 "Allow young-old boundary to move") \ 2039 \ 2040 develop(bool, TraceAdaptiveGCBoundary, false, \ 2041 "Trace young-old boundary moves") \ 2042 \ 2043 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2044 "Resize the virtual spaces of the young or old generations") \ 2045 \ 2046 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2047 "Policy for changing generation size for throughput goals") \ 2048 \ 2049 product(uintx, AdaptiveSizePausePolicy, 0, \ 2050 "Policy for changing generation size for pause goals") \ 2051 \ 2052 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 2053 "Adjust tenured generation to achieve a minor pause goal") \ 2054 \ 2055 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2056 "Adjust young generation to achieve a major pause goal") \ 2057 \ 2058 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2059 "Number of steps where heuristics is used before data is used") \ 2060 \ 2061 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2062 "Number of collections before the adaptive sizing is started") \ 2063 \ 2064 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2065 "Collection interval for printing information; zero means never") \ 2066 \ 2067 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2068 "Use adaptive minimum footprint as a goal") \ 2069 \ 2070 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2071 "Weight given to exponential resizing, between 0 and 100") \ 2072 \ 2073 product(uintx, AdaptiveTimeWeight, 25, \ 2074 "Weight given to time in adaptive policy, between 0 and 100") \ 2075 \ 2076 product(uintx, PausePadding, 1, \ 2077 "How much buffer to keep for pause time") \ 2078 \ 2079 product(uintx, PromotedPadding, 3, \ 2080 "How much buffer to keep for promotion failure") \ 2081 \ 2082 product(uintx, SurvivorPadding, 3, \ 2083 "How much buffer to keep for survivor overflow") \ 2084 \ 2085 product(uintx, ThresholdTolerance, 10, \ 2086 "Allowed collection cost difference between generations") \ 2087 \ 2088 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2089 "If collection costs are within margin, reduce both by full " \ 2090 "delta") \ 2091 \ 2092 product(uintx, YoungGenerationSizeIncrement, 20, \ 2093 "Adaptive size percentage change in young generation") \ 2094 \ 2095 product(uintx, YoungGenerationSizeSupplement, 80, \ 2096 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2097 \ 2098 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2099 "Decay factor to YoungedGenerationSizeSupplement") \ 2100 \ 2101 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2102 "Adaptive size percentage change in tenured generation") \ 2103 \ 2104 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2105 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2106 \ 2107 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2108 "Decay factor to TenuredGenerationSizeIncrement") \ 2109 \ 2110 product(uintx, MaxGCPauseMillis, max_uintx, \ 2111 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2112 "or (G1 Only) the maximum GC time per MMU time slice") \ 2113 \ 2114 product(uintx, GCPauseIntervalMillis, 0, \ 2115 "Time slice for MMU specification") \ 2116 \ 2117 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2118 "Adaptive size policy maximum GC minor pause time goal " \ 2119 "in millisecond") \ 2120 \ 2121 product(uintx, GCTimeRatio, 99, \ 2122 "Adaptive size policy application time to GC time ratio") \ 2123 \ 2124 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2125 "Adaptive size scale down factor for shrinking") \ 2126 \ 2127 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2128 "Adaptive size decays the major cost for long major intervals") \ 2129 \ 2130 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2131 "Time scale over which major costs decay") \ 2132 \ 2133 product(uintx, MinSurvivorRatio, 3, \ 2134 "Minimum ratio of young generation/survivor space size") \ 2135 \ 2136 product(uintx, InitialSurvivorRatio, 8, \ 2137 "Initial ratio of eden/survivor space size") \ 2138 \ 2139 product(uintx, BaseFootPrintEstimate, 256*M, \ 2140 "Estimate of footprint other than Java Heap") \ 2141 \ 2142 product(bool, UseGCOverheadLimit, true, \ 2143 "Use policy to limit of proportion of time spent in GC " \ 2144 "before an OutOfMemory error is thrown") \ 2145 \ 2146 product(uintx, GCTimeLimit, 98, \ 2147 "Limit of the proportion of time spent in GC before " \ 2148 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2149 \ 2150 product(uintx, GCHeapFreeLimit, 2, \ 2151 "Minimum percentage of free space after a full GC before an " \ 2152 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2153 \ 2154 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2155 "Number of consecutive collections before gc time limit fires") \ 2156 \ 2157 product(bool, PrintAdaptiveSizePolicy, false, \ 2158 "Print information about AdaptiveSizePolicy") \ 2159 \ 2160 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2161 "How far ahead to prefetch destination area (<= 0 means off)") \ 2162 \ 2163 product(intx, PrefetchScanIntervalInBytes, -1, \ 2164 "How far ahead to prefetch scan area (<= 0 means off)") \ 2165 \ 2166 product(intx, PrefetchFieldsAhead, -1, \ 2167 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2168 \ 2169 diagnostic(bool, VerifySilently, false, \ 2170 "Do not print the verification progress") \ 2171 \ 2172 diagnostic(bool, VerifyDuringStartup, false, \ 2173 "Verify memory system before executing any Java code " \ 2174 "during VM initialization") \ 2175 \ 2176 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2177 "Verify system before exiting") \ 2178 \ 2179 diagnostic(bool, VerifyBeforeGC, false, \ 2180 "Verify memory system before GC") \ 2181 \ 2182 diagnostic(bool, VerifyAfterGC, false, \ 2183 "Verify memory system after GC") \ 2184 \ 2185 diagnostic(bool, VerifyDuringGC, false, \ 2186 "Verify memory system during GC (between phases)") \ 2187 \ 2188 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2189 "Enable parallel memory system verification") \ 2190 \ 2191 diagnostic(bool, DeferInitialCardMark, false, \ 2192 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2193 "may arise from new_pre_store_barrier") \ 2194 \ 2195 diagnostic(bool, VerifyRememberedSets, false, \ 2196 "Verify GC remembered sets") \ 2197 \ 2198 diagnostic(bool, VerifyObjectStartArray, true, \ 2199 "Verify GC object start array if verify before/after") \ 2200 \ 2201 product(bool, DisableExplicitGC, false, \ 2202 "Ignore calls to System.gc()") \ 2203 \ 2204 notproduct(bool, CheckMemoryInitialization, false, \ 2205 "Check memory initialization") \ 2206 \ 2207 product(bool, CollectGen0First, false, \ 2208 "Collect youngest generation before each full GC") \ 2209 \ 2210 diagnostic(bool, BindCMSThreadToCPU, false, \ 2211 "Bind CMS Thread to CPU if possible") \ 2212 \ 2213 diagnostic(uintx, CPUForCMSThread, 0, \ 2214 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2215 \ 2216 product(bool, BindGCTaskThreadsToCPUs, false, \ 2217 "Bind GCTaskThreads to CPUs if possible") \ 2218 \ 2219 product(bool, UseGCTaskAffinity, false, \ 2220 "Use worker affinity when asking for GCTasks") \ 2221 \ 2222 product(uintx, ProcessDistributionStride, 4, \ 2223 "Stride through processors when distributing processes") \ 2224 \ 2225 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2226 "Number of times the coordinator GC thread will sleep while " \ 2227 "yielding before giving up and resuming GC") \ 2228 \ 2229 product(uintx, CMSYieldSleepCount, 0, \ 2230 "Number of times a GC thread (minus the coordinator) " \ 2231 "will sleep while yielding before giving up and resuming GC") \ 2232 \ 2233 /* gc tracing */ \ 2234 manageable(bool, PrintGC, false, \ 2235 "Print message at garbage collection") \ 2236 \ 2237 manageable(bool, PrintGCDetails, false, \ 2238 "Print more details at garbage collection") \ 2239 \ 2240 manageable(bool, PrintGCDateStamps, false, \ 2241 "Print date stamps at garbage collection") \ 2242 \ 2243 manageable(bool, PrintGCTimeStamps, false, \ 2244 "Print timestamps at garbage collection") \ 2245 \ 2246 product(bool, PrintGCTaskTimeStamps, false, \ 2247 "Print timestamps for individual gc worker thread tasks") \ 2248 \ 2249 develop(intx, ConcGCYieldTimeout, 0, \ 2250 "If non-zero, assert that GC threads yield within this " \ 2251 "number of milliseconds") \ 2252 \ 2253 notproduct(bool, TraceMarkSweep, false, \ 2254 "Trace mark sweep") \ 2255 \ 2256 product(bool, PrintReferenceGC, false, \ 2257 "Print times spent handling reference objects during GC " \ 2258 "(enabled only when PrintGCDetails)") \ 2259 \ 2260 develop(bool, TraceReferenceGC, false, \ 2261 "Trace handling of soft/weak/final/phantom references") \ 2262 \ 2263 develop(bool, TraceFinalizerRegistration, false, \ 2264 "Trace registration of final references") \ 2265 \ 2266 notproduct(bool, TraceScavenge, false, \ 2267 "Trace scavenge") \ 2268 \ 2269 product_rw(bool, TraceClassLoading, false, \ 2270 "Trace all classes loaded") \ 2271 \ 2272 product(bool, TraceClassLoadingPreorder, false, \ 2273 "Trace all classes loaded in order referenced (not loaded)") \ 2274 \ 2275 product_rw(bool, TraceClassUnloading, false, \ 2276 "Trace unloading of classes") \ 2277 \ 2278 product_rw(bool, TraceLoaderConstraints, false, \ 2279 "Trace loader constraints") \ 2280 \ 2281 develop(bool, TraceClassLoaderData, false, \ 2282 "Trace class loader loader_data lifetime") \ 2283 \ 2284 product(uintx, InitialBootClassLoaderMetaspaceSize, \ 2285 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2286 "Initial size of the boot class loader data metaspace") \ 2287 \ 2288 product(bool, TraceGen0Time, false, \ 2289 "Trace accumulated time for Gen 0 collection") \ 2290 \ 2291 product(bool, TraceGen1Time, false, \ 2292 "Trace accumulated time for Gen 1 collection") \ 2293 \ 2294 product(bool, PrintTenuringDistribution, false, \ 2295 "Print tenuring age information") \ 2296 \ 2297 product_rw(bool, PrintHeapAtGC, false, \ 2298 "Print heap layout before and after each GC") \ 2299 \ 2300 product_rw(bool, PrintHeapAtGCExtended, false, \ 2301 "Print extended information about the layout of the heap " \ 2302 "when -XX:+PrintHeapAtGC is set") \ 2303 \ 2304 product(bool, PrintHeapAtSIGBREAK, true, \ 2305 "Print heap layout in response to SIGBREAK") \ 2306 \ 2307 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2308 "Print a class histogram before any major stop-world GC") \ 2309 \ 2310 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2311 "Print a class histogram after any major stop-world GC") \ 2312 \ 2313 manageable(bool, PrintClassHistogram, false, \ 2314 "Print a histogram of class instances") \ 2315 \ 2316 develop(bool, TraceWorkGang, false, \ 2317 "Trace activities of work gangs") \ 2318 \ 2319 product(bool, TraceParallelOldGCTasks, false, \ 2320 "Trace multithreaded GC activity") \ 2321 \ 2322 develop(bool, TraceBlockOffsetTable, false, \ 2323 "Print BlockOffsetTable maps") \ 2324 \ 2325 develop(bool, TraceCardTableModRefBS, false, \ 2326 "Print CardTableModRefBS maps") \ 2327 \ 2328 develop(bool, TraceGCTaskManager, false, \ 2329 "Trace actions of the GC task manager") \ 2330 \ 2331 develop(bool, TraceGCTaskQueue, false, \ 2332 "Trace actions of the GC task queues") \ 2333 \ 2334 diagnostic(bool, TraceGCTaskThread, false, \ 2335 "Trace actions of the GC task threads") \ 2336 \ 2337 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2338 "Print the time taken by each phase in ParallelOldGC " \ 2339 "(PrintGCDetails must also be enabled)") \ 2340 \ 2341 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2342 "Trace marking phase in ParallelOldGC") \ 2343 \ 2344 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2345 "Trace summary phase in ParallelOldGC") \ 2346 \ 2347 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2348 "Trace compaction phase in ParallelOldGC") \ 2349 \ 2350 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2351 "Trace dense prefix computation for ParallelOldGC") \ 2352 \ 2353 develop(bool, IgnoreLibthreadGPFault, false, \ 2354 "Suppress workaround for libthread GP fault") \ 2355 \ 2356 product(bool, PrintJNIGCStalls, false, \ 2357 "Print diagnostic message when GC is stalled " \ 2358 "by JNI critical section") \ 2359 \ 2360 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2361 "The percentage of the used heap that the instances of a class " \ 2362 "must occupy for the class to generate a trace event") \ 2363 \ 2364 /* GC log rotation setting */ \ 2365 \ 2366 product(bool, UseGCLogFileRotation, false, \ 2367 "Rotate gclog files (for long running applications). It requires "\ 2368 "-Xloggc:<filename>") \ 2369 \ 2370 product(uintx, NumberOfGCLogFiles, 0, \ 2371 "Number of gclog files in rotation " \ 2372 "(default: 0, no rotation)") \ 2373 \ 2374 product(uintx, GCLogFileSize, 0, \ 2375 "GC log file size (default: 0 bytes, no rotation). " \ 2376 "It requires UseGCLogFileRotation") \ 2377 \ 2378 /* JVMTI heap profiling */ \ 2379 \ 2380 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2381 "Trace JVMTI object tagging calls") \ 2382 \ 2383 diagnostic(bool, VerifyBeforeIteration, false, \ 2384 "Verify memory system before JVMTI iteration") \ 2385 \ 2386 /* compiler interface */ \ 2387 \ 2388 develop(bool, CIPrintCompilerName, false, \ 2389 "when CIPrint is active, print the name of the active compiler") \ 2390 \ 2391 develop(bool, CIPrintCompileQueue, false, \ 2392 "display the contents of the compile queue whenever a " \ 2393 "compilation is enqueued") \ 2394 \ 2395 develop(bool, CIPrintRequests, false, \ 2396 "display every request for compilation") \ 2397 \ 2398 product(bool, CITime, false, \ 2399 "collect timing information for compilation") \ 2400 \ 2401 develop(bool, CITimeEach, false, \ 2402 "display timing information after each successful compilation") \ 2403 \ 2404 develop(bool, CICountOSR, false, \ 2405 "use a separate counter when assigning ids to osr compilations") \ 2406 \ 2407 develop(bool, CICompileNatives, true, \ 2408 "compile native methods if supported by the compiler") \ 2409 \ 2410 develop_pd(bool, CICompileOSR, \ 2411 "compile on stack replacement methods if supported by the " \ 2412 "compiler") \ 2413 \ 2414 develop(bool, CIPrintMethodCodes, false, \ 2415 "print method bytecodes of the compiled code") \ 2416 \ 2417 develop(bool, CIPrintTypeFlow, false, \ 2418 "print the results of ciTypeFlow analysis") \ 2419 \ 2420 develop(bool, CITraceTypeFlow, false, \ 2421 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2422 \ 2423 develop(intx, OSROnlyBCI, -1, \ 2424 "OSR only at this bci. Negative values mean exclude that bci") \ 2425 \ 2426 /* compiler */ \ 2427 \ 2428 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2429 "Number of compiler threads to run") \ 2430 \ 2431 product(intx, CompilationPolicyChoice, 0, \ 2432 "which compilation policy (0/1)") \ 2433 \ 2434 develop(bool, UseStackBanging, true, \ 2435 "use stack banging for stack overflow checks (required for " \ 2436 "proper StackOverflow handling; disable only to measure cost " \ 2437 "of stackbanging)") \ 2438 \ 2439 develop(bool, UseStrictFP, true, \ 2440 "use strict fp if modifier strictfp is set") \ 2441 \ 2442 develop(bool, GenerateSynchronizationCode, true, \ 2443 "generate locking/unlocking code for synchronized methods and " \ 2444 "monitors") \ 2445 \ 2446 develop(bool, GenerateCompilerNullChecks, true, \ 2447 "Generate explicit null checks for loads/stores/calls") \ 2448 \ 2449 develop(bool, GenerateRangeChecks, true, \ 2450 "Generate range checks for array accesses") \ 2451 \ 2452 develop_pd(bool, ImplicitNullChecks, \ 2453 "Generate code for implicit null checks") \ 2454 \ 2455 product(bool, PrintSafepointStatistics, false, \ 2456 "Print statistics about safepoint synchronization") \ 2457 \ 2458 product(intx, PrintSafepointStatisticsCount, 300, \ 2459 "Total number of safepoint statistics collected " \ 2460 "before printing them out") \ 2461 \ 2462 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2463 "Print safepoint statistics only when safepoint takes " \ 2464 "more than PrintSafepointSatisticsTimeout in millis") \ 2465 \ 2466 product(bool, TraceSafepointCleanupTime, false, \ 2467 "Print the break down of clean up tasks performed during " \ 2468 "safepoint") \ 2469 \ 2470 product(bool, Inline, true, \ 2471 "Enable inlining") \ 2472 \ 2473 product(bool, ClipInlining, true, \ 2474 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2475 \ 2476 develop(bool, UseCHA, true, \ 2477 "Enable CHA") \ 2478 \ 2479 product(bool, UseTypeProfile, true, \ 2480 "Check interpreter profile for historically monomorphic calls") \ 2481 \ 2482 notproduct(bool, TimeCompiler, false, \ 2483 "Time the compiler") \ 2484 \ 2485 diagnostic(bool, PrintInlining, false, \ 2486 "Print inlining optimizations") \ 2487 \ 2488 product(bool, UsePopCountInstruction, false, \ 2489 "Use population count instruction") \ 2490 \ 2491 develop(bool, EagerInitialization, false, \ 2492 "Eagerly initialize classes if possible") \ 2493 \ 2494 develop(bool, TraceMethodReplacement, false, \ 2495 "Print when methods are replaced do to recompilation") \ 2496 \ 2497 develop(bool, PrintMethodFlushing, false, \ 2498 "Print the nmethods being flushed") \ 2499 \ 2500 develop(bool, UseRelocIndex, false, \ 2501 "Use an index to speed random access to relocations") \ 2502 \ 2503 develop(bool, StressCodeBuffers, false, \ 2504 "Exercise code buffer expansion and other rare state changes") \ 2505 \ 2506 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2507 "Generate extra debugging information for non-safepoints in " \ 2508 "nmethods") \ 2509 \ 2510 product(bool, PrintVMOptions, false, \ 2511 "Print flags that appeared on the command line") \ 2512 \ 2513 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2514 "Ignore unrecognized VM options") \ 2515 \ 2516 product(bool, PrintCommandLineFlags, false, \ 2517 "Print flags specified on command line or set by ergonomics") \ 2518 \ 2519 product(bool, PrintFlagsInitial, false, \ 2520 "Print all VM flags before argument processing and exit VM") \ 2521 \ 2522 product(bool, PrintFlagsFinal, false, \ 2523 "Print all VM flags after argument and ergonomic processing") \ 2524 \ 2525 notproduct(bool, PrintFlagsWithComments, false, \ 2526 "Print all VM flags with default values and descriptions and " \ 2527 "exit") \ 2528 \ 2529 diagnostic(bool, SerializeVMOutput, true, \ 2530 "Use a mutex to serialize output to tty and LogFile") \ 2531 \ 2532 diagnostic(bool, DisplayVMOutput, true, \ 2533 "Display all VM output on the tty, independently of LogVMOutput") \ 2534 \ 2535 diagnostic(bool, LogVMOutput, false, \ 2536 "Save VM output to LogFile") \ 2537 \ 2538 diagnostic(ccstr, LogFile, NULL, \ 2539 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2540 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2541 \ 2542 product(ccstr, ErrorFile, NULL, \ 2543 "If an error occurs, save the error data to this file " \ 2544 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2545 \ 2546 product(bool, DisplayVMOutputToStderr, false, \ 2547 "If DisplayVMOutput is true, display all VM output to stderr") \ 2548 \ 2549 product(bool, DisplayVMOutputToStdout, false, \ 2550 "If DisplayVMOutput is true, display all VM output to stdout") \ 2551 \ 2552 product(bool, UseHeavyMonitors, false, \ 2553 "use heavyweight instead of lightweight Java monitors") \ 2554 \ 2555 product(bool, PrintStringTableStatistics, false, \ 2556 "print statistics about the StringTable and SymbolTable") \ 2557 \ 2558 diagnostic(bool, VerifyStringTableAtExit, false, \ 2559 "verify StringTable contents at exit") \ 2560 \ 2561 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2562 "print histogram of the symbol table") \ 2563 \ 2564 notproduct(bool, ExitVMOnVerifyError, false, \ 2565 "standard exit from VM if bytecode verify error " \ 2566 "(only in debug mode)") \ 2567 \ 2568 notproduct(ccstr, AbortVMOnException, NULL, \ 2569 "Call fatal if this exception is thrown. Example: " \ 2570 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2571 \ 2572 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2573 "Call fatal if the exception pointed by AbortVMOnException " \ 2574 "has this message") \ 2575 \ 2576 develop(bool, DebugVtables, false, \ 2577 "add debugging code to vtable dispatch") \ 2578 \ 2579 develop(bool, PrintVtables, false, \ 2580 "print vtables when printing klass") \ 2581 \ 2582 notproduct(bool, PrintVtableStats, false, \ 2583 "print vtables stats at end of run") \ 2584 \ 2585 develop(bool, TraceCreateZombies, false, \ 2586 "trace creation of zombie nmethods") \ 2587 \ 2588 notproduct(bool, IgnoreLockingAssertions, false, \ 2589 "disable locking assertions (for speed)") \ 2590 \ 2591 product(bool, RangeCheckElimination, true, \ 2592 "Eliminate range checks") \ 2593 \ 2594 develop_pd(bool, UncommonNullCast, \ 2595 "track occurrences of null in casts; adjust compiler tactics") \ 2596 \ 2597 develop(bool, TypeProfileCasts, true, \ 2598 "treat casts like calls for purposes of type profiling") \ 2599 \ 2600 develop(bool, DelayCompilationDuringStartup, true, \ 2601 "Delay invoking the compiler until main application class is " \ 2602 "loaded") \ 2603 \ 2604 develop(bool, CompileTheWorld, false, \ 2605 "Compile all methods in all classes in bootstrap class path " \ 2606 "(stress test)") \ 2607 \ 2608 develop(bool, CompileTheWorldPreloadClasses, true, \ 2609 "Preload all classes used by a class before start loading") \ 2610 \ 2611 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2612 "Force a safepoint every n compiles so sweeper can keep up") \ 2613 \ 2614 develop(bool, FillDelaySlots, true, \ 2615 "Fill delay slots (on SPARC only)") \ 2616 \ 2617 develop(bool, TimeLivenessAnalysis, false, \ 2618 "Time computation of bytecode liveness analysis") \ 2619 \ 2620 develop(bool, TraceLivenessGen, false, \ 2621 "Trace the generation of liveness analysis information") \ 2622 \ 2623 notproduct(bool, TraceLivenessQuery, false, \ 2624 "Trace queries of liveness analysis information") \ 2625 \ 2626 notproduct(bool, CollectIndexSetStatistics, false, \ 2627 "Collect information about IndexSets") \ 2628 \ 2629 develop(bool, UseLoopSafepoints, true, \ 2630 "Generate Safepoint nodes in every loop") \ 2631 \ 2632 develop(intx, FastAllocateSizeLimit, 128*K, \ 2633 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2634 "Inline allocations larger than this in doublewords must go slow")\ 2635 \ 2636 product(bool, AggressiveOpts, false, \ 2637 "Enable aggressive optimizations - see arguments.cpp") \ 2638 \ 2639 /* statistics */ \ 2640 develop(bool, CountCompiledCalls, false, \ 2641 "Count method invocations") \ 2642 \ 2643 notproduct(bool, CountRuntimeCalls, false, \ 2644 "Count VM runtime calls") \ 2645 \ 2646 develop(bool, CountJNICalls, false, \ 2647 "Count jni method invocations") \ 2648 \ 2649 notproduct(bool, CountJVMCalls, false, \ 2650 "Count jvm method invocations") \ 2651 \ 2652 notproduct(bool, CountRemovableExceptions, false, \ 2653 "Count exceptions that could be replaced by branches due to " \ 2654 "inlining") \ 2655 \ 2656 notproduct(bool, ICMissHistogram, false, \ 2657 "Produce histogram of IC misses") \ 2658 \ 2659 notproduct(bool, PrintClassStatistics, false, \ 2660 "Print class statistics at end of run") \ 2661 \ 2662 notproduct(bool, PrintMethodStatistics, false, \ 2663 "Print method statistics at end of run") \ 2664 \ 2665 /* interpreter */ \ 2666 develop(bool, ClearInterpreterLocals, false, \ 2667 "Always clear local variables of interpreter activations upon " \ 2668 "entry") \ 2669 \ 2670 product_pd(bool, RewriteBytecodes, \ 2671 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2672 \ 2673 product_pd(bool, RewriteFrequentPairs, \ 2674 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2675 \ 2676 diagnostic(bool, PrintInterpreter, false, \ 2677 "Print the generated interpreter code") \ 2678 \ 2679 product(bool, UseInterpreter, true, \ 2680 "Use interpreter for non-compiled methods") \ 2681 \ 2682 develop(bool, UseFastSignatureHandlers, true, \ 2683 "Use fast signature handlers for native calls") \ 2684 \ 2685 product(bool, UseLoopCounter, true, \ 2686 "Increment invocation counter on backward branch") \ 2687 \ 2688 product(bool, UseFastEmptyMethods, true, \ 2689 "Use fast method entry code for empty methods") \ 2690 \ 2691 product(bool, UseFastAccessorMethods, true, \ 2692 "Use fast method entry code for accessor methods") \ 2693 \ 2694 product_pd(bool, UseOnStackReplacement, \ 2695 "Use on stack replacement, calls runtime if invoc. counter " \ 2696 "overflows in loop") \ 2697 \ 2698 notproduct(bool, TraceOnStackReplacement, false, \ 2699 "Trace on stack replacement") \ 2700 \ 2701 product_pd(bool, PreferInterpreterNativeStubs, \ 2702 "Use always interpreter stubs for native methods invoked via " \ 2703 "interpreter") \ 2704 \ 2705 develop(bool, CountBytecodes, false, \ 2706 "Count number of bytecodes executed") \ 2707 \ 2708 develop(bool, PrintBytecodeHistogram, false, \ 2709 "Print histogram of the executed bytecodes") \ 2710 \ 2711 develop(bool, PrintBytecodePairHistogram, false, \ 2712 "Print histogram of the executed bytecode pairs") \ 2713 \ 2714 diagnostic(bool, PrintSignatureHandlers, false, \ 2715 "Print code generated for native method signature handlers") \ 2716 \ 2717 develop(bool, VerifyOops, false, \ 2718 "Do plausibility checks for oops") \ 2719 \ 2720 develop(bool, CheckUnhandledOops, false, \ 2721 "Check for unhandled oops in VM code") \ 2722 \ 2723 develop(bool, VerifyJNIFields, trueInDebug, \ 2724 "Verify jfieldIDs for instance fields") \ 2725 \ 2726 notproduct(bool, VerifyJNIEnvThread, false, \ 2727 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2728 "from JNI") \ 2729 \ 2730 develop(bool, VerifyFPU, false, \ 2731 "Verify FPU state (check for NaN's, etc.)") \ 2732 \ 2733 develop(bool, VerifyThread, false, \ 2734 "Watch the thread register for corruption (SPARC only)") \ 2735 \ 2736 develop(bool, VerifyActivationFrameSize, false, \ 2737 "Verify that activation frame didn't become smaller than its " \ 2738 "minimal size") \ 2739 \ 2740 develop(bool, TraceFrequencyInlining, false, \ 2741 "Trace frequency based inlining") \ 2742 \ 2743 develop_pd(bool, InlineIntrinsics, \ 2744 "Inline intrinsics that can be statically resolved") \ 2745 \ 2746 product_pd(bool, ProfileInterpreter, \ 2747 "Profile at the bytecode level during interpretation") \ 2748 \ 2749 develop_pd(bool, ProfileTraps, \ 2750 "Profile deoptimization traps at the bytecode level") \ 2751 \ 2752 product(intx, ProfileMaturityPercentage, 20, \ 2753 "number of method invocations/branches (expressed as % of " \ 2754 "CompileThreshold) before using the method's profile") \ 2755 \ 2756 develop(bool, PrintMethodData, false, \ 2757 "Print the results of +ProfileInterpreter at end of run") \ 2758 \ 2759 develop(bool, VerifyDataPointer, trueInDebug, \ 2760 "Verify the method data pointer during interpreter profiling") \ 2761 \ 2762 develop(bool, VerifyCompiledCode, false, \ 2763 "Include miscellaneous runtime verifications in nmethod code; " \ 2764 "default off because it disturbs nmethod size heuristics") \ 2765 \ 2766 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2767 "Manually make GC thread crash then dump java stack trace; " \ 2768 "Test only") \ 2769 \ 2770 /* compilation */ \ 2771 product(bool, UseCompiler, true, \ 2772 "Use Just-In-Time compilation") \ 2773 \ 2774 develop(bool, TraceCompilationPolicy, false, \ 2775 "Trace compilation policy") \ 2776 \ 2777 develop(bool, TimeCompilationPolicy, false, \ 2778 "Time the compilation policy") \ 2779 \ 2780 product(bool, UseCounterDecay, true, \ 2781 "Adjust recompilation counters") \ 2782 \ 2783 develop(intx, CounterHalfLifeTime, 30, \ 2784 "Half-life time of invocation counters (in seconds)") \ 2785 \ 2786 develop(intx, CounterDecayMinIntervalLength, 500, \ 2787 "The minimum interval (in milliseconds) between invocation of " \ 2788 "CounterDecay") \ 2789 \ 2790 product(bool, AlwaysCompileLoopMethods, false, \ 2791 "When using recompilation, never interpret methods " \ 2792 "containing loops") \ 2793 \ 2794 product(bool, DontCompileHugeMethods, true, \ 2795 "Do not compile methods > HugeMethodLimit") \ 2796 \ 2797 /* Bytecode escape analysis estimation. */ \ 2798 product(bool, EstimateArgEscape, true, \ 2799 "Analyze bytecodes to estimate escape state of arguments") \ 2800 \ 2801 product(intx, BCEATraceLevel, 0, \ 2802 "How much tracing to do of bytecode escape analysis estimates") \ 2803 \ 2804 product(intx, MaxBCEAEstimateLevel, 5, \ 2805 "Maximum number of nested calls that are analyzed by BC EA") \ 2806 \ 2807 product(intx, MaxBCEAEstimateSize, 150, \ 2808 "Maximum bytecode size of a method to be analyzed by BC EA") \ 2809 \ 2810 product(intx, AllocatePrefetchStyle, 1, \ 2811 "0 = no prefetch, " \ 2812 "1 = prefetch instructions for each allocation, " \ 2813 "2 = use TLAB watermark to gate allocation prefetch, " \ 2814 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2815 \ 2816 product(intx, AllocatePrefetchDistance, -1, \ 2817 "Distance to prefetch ahead of allocation pointer") \ 2818 \ 2819 product(intx, AllocatePrefetchLines, 3, \ 2820 "Number of lines to prefetch ahead of array allocation pointer") \ 2821 \ 2822 product(intx, AllocateInstancePrefetchLines, 1, \ 2823 "Number of lines to prefetch ahead of instance allocation " \ 2824 "pointer") \ 2825 \ 2826 product(intx, AllocatePrefetchStepSize, 16, \ 2827 "Step size in bytes of sequential prefetch instructions") \ 2828 \ 2829 product(intx, AllocatePrefetchInstr, 0, \ 2830 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2831 \ 2832 /* deoptimization */ \ 2833 develop(bool, TraceDeoptimization, false, \ 2834 "Trace deoptimization") \ 2835 \ 2836 develop(bool, DebugDeoptimization, false, \ 2837 "Tracing various information while debugging deoptimization") \ 2838 \ 2839 product(intx, SelfDestructTimer, 0, \ 2840 "Will cause VM to terminate after a given time (in minutes) " \ 2841 "(0 means off)") \ 2842 \ 2843 product(intx, MaxJavaStackTraceDepth, 1024, \ 2844 "The maximum number of lines in the stack trace for Java " \ 2845 "exceptions (0 means all)") \ 2846 \ 2847 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2848 "Guarantee a safepoint (at least) every so many milliseconds " \ 2849 "(0 means none)")) \ 2850 \ 2851 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2852 "Guarantee a safepoint (at least) every so many milliseconds " \ 2853 "(0 means none)")) \ 2854 \ 2855 product(intx, SafepointTimeoutDelay, 10000, \ 2856 "Delay in milliseconds for option SafepointTimeout") \ 2857 \ 2858 product(intx, NmethodSweepFraction, 16, \ 2859 "Number of invocations of sweeper to cover all nmethods") \ 2860 \ 2861 product(intx, NmethodSweepCheckInterval, 5, \ 2862 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2863 \ 2864 notproduct(bool, LogSweeper, false, \ 2865 "Keep a ring buffer of sweeper activity") \ 2866 \ 2867 notproduct(intx, SweeperLogEntries, 1024, \ 2868 "Number of records in the ring buffer of sweeper activity") \ 2869 \ 2870 notproduct(intx, MemProfilingInterval, 500, \ 2871 "Time between each invocation of the MemProfiler") \ 2872 \ 2873 develop(intx, MallocCatchPtr, -1, \ 2874 "Hit breakpoint when mallocing/freeing this pointer") \ 2875 \ 2876 notproduct(intx, AssertRepeat, 1, \ 2877 "number of times to evaluate expression in assert " \ 2878 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2879 \ 2880 notproduct(ccstrlist, SuppressErrorAt, "", \ 2881 "List of assertions (file:line) to muzzle") \ 2882 \ 2883 notproduct(uintx, HandleAllocationLimit, 1024, \ 2884 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2885 "is used") \ 2886 \ 2887 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2888 "Threshold for total handle allocation when " \ 2889 "+TraceHandleAllocation is used") \ 2890 \ 2891 develop(intx, StackPrintLimit, 100, \ 2892 "number of stack frames to print in VM-level stack dump") \ 2893 \ 2894 notproduct(intx, MaxElementPrintSize, 256, \ 2895 "maximum number of elements to print") \ 2896 \ 2897 notproduct(intx, MaxSubklassPrintSize, 4, \ 2898 "maximum number of subklasses to print when printing klass") \ 2899 \ 2900 product(intx, MaxInlineLevel, 9, \ 2901 "maximum number of nested calls that are inlined") \ 2902 \ 2903 product(intx, MaxRecursiveInlineLevel, 1, \ 2904 "maximum number of nested recursive calls that are inlined") \ 2905 \ 2906 product_pd(intx, InlineSmallCode, \ 2907 "Only inline already compiled methods if their code size is " \ 2908 "less than this") \ 2909 \ 2910 product(intx, MaxInlineSize, 35, \ 2911 "The maximum bytecode size of a method to be inlined") \ 2912 \ 2913 product_pd(intx, FreqInlineSize, \ 2914 "The maximum bytecode size of a frequent method to be inlined") \ 2915 \ 2916 product(intx, MaxTrivialSize, 6, \ 2917 "The maximum bytecode size of a trivial method to be inlined") \ 2918 \ 2919 product(intx, MinInliningThreshold, 250, \ 2920 "The minimum invocation count a method needs to have to be " \ 2921 "inlined") \ 2922 \ 2923 develop(intx, MethodHistogramCutoff, 100, \ 2924 "The cutoff value for method invocation histogram (+CountCalls)") \ 2925 \ 2926 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2927 "Number of interpreted methods to show in profile") \ 2928 \ 2929 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2930 "Number of compiled methods to show in profile") \ 2931 \ 2932 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2933 "Number of stub methods to show in profile") \ 2934 \ 2935 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2936 "Number of runtime stub nodes to show in profile") \ 2937 \ 2938 product(intx, ProfileIntervalsTicks, 100, \ 2939 "Number of ticks between printing of interval profile " \ 2940 "(+ProfileIntervals)") \ 2941 \ 2942 notproduct(intx, ScavengeALotInterval, 1, \ 2943 "Interval between which scavenge will occur with +ScavengeALot") \ 2944 \ 2945 notproduct(intx, FullGCALotInterval, 1, \ 2946 "Interval between which full gc will occur with +FullGCALot") \ 2947 \ 2948 notproduct(intx, FullGCALotStart, 0, \ 2949 "For which invocation to start FullGCAlot") \ 2950 \ 2951 notproduct(intx, FullGCALotDummies, 32*K, \ 2952 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2953 "to move") \ 2954 \ 2955 develop(intx, DontYieldALotInterval, 10, \ 2956 "Interval between which yields will be dropped (milliseconds)") \ 2957 \ 2958 develop(intx, MinSleepInterval, 1, \ 2959 "Minimum sleep() interval (milliseconds) when " \ 2960 "ConvertSleepToYield is off (used for Solaris)") \ 2961 \ 2962 develop(intx, ProfilerPCTickThreshold, 15, \ 2963 "Number of ticks in a PC buckets to be a hotspot") \ 2964 \ 2965 notproduct(intx, DeoptimizeALotInterval, 5, \ 2966 "Number of exits until DeoptimizeALot kicks in") \ 2967 \ 2968 notproduct(intx, ZombieALotInterval, 5, \ 2969 "Number of exits until ZombieALot kicks in") \ 2970 \ 2971 develop(bool, StressNonEntrant, false, \ 2972 "Mark nmethods non-entrant at registration") \ 2973 \ 2974 diagnostic(intx, MallocVerifyInterval, 0, \ 2975 "If non-zero, verify C heap after every N calls to " \ 2976 "malloc/realloc/free") \ 2977 \ 2978 diagnostic(intx, MallocVerifyStart, 0, \ 2979 "If non-zero, start verifying C heap after Nth call to " \ 2980 "malloc/realloc/free") \ 2981 \ 2982 diagnostic(uintx, MallocMaxTestWords, 0, \ 2983 "If non-zero, maximum number of words that malloc/realloc can " \ 2984 "allocate (for testing only)") \ 2985 \ 2986 product(intx, TypeProfileWidth, 2, \ 2987 "Number of receiver types to record in call/cast profile") \ 2988 \ 2989 develop(intx, BciProfileWidth, 2, \ 2990 "Number of return bci's to record in ret profile") \ 2991 \ 2992 product(intx, PerMethodRecompilationCutoff, 400, \ 2993 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2994 \ 2995 product(intx, PerBytecodeRecompilationCutoff, 200, \ 2996 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2997 \ 2998 product(intx, PerMethodTrapLimit, 100, \ 2999 "Limit on traps (of one kind) in a method (includes inlines)") \ 3000 \ 3001 product(intx, PerBytecodeTrapLimit, 4, \ 3002 "Limit on traps (of one kind) at a particular BCI") \ 3003 \ 3004 develop(intx, InlineFrequencyRatio, 20, \ 3005 "Ratio of call site execution to caller method invocation") \ 3006 \ 3007 develop_pd(intx, InlineFrequencyCount, \ 3008 "Count of call site execution necessary to trigger frequent " \ 3009 "inlining") \ 3010 \ 3011 develop(intx, InlineThrowCount, 50, \ 3012 "Force inlining of interpreted methods that throw this often") \ 3013 \ 3014 develop(intx, InlineThrowMaxSize, 200, \ 3015 "Force inlining of throwing methods smaller than this") \ 3016 \ 3017 develop(intx, ProfilerNodeSize, 1024, \ 3018 "Size in K to allocate for the Profile Nodes of each thread") \ 3019 \ 3020 product_pd(intx, PreInflateSpin, \ 3021 "Number of times to spin wait before inflation") \ 3022 \ 3023 /* gc parameters */ \ 3024 product(uintx, InitialHeapSize, 0, \ 3025 "Initial heap size (in bytes); zero means use ergonomics") \ 3026 \ 3027 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 3028 "Maximum heap size (in bytes)") \ 3029 \ 3030 product(uintx, OldSize, ScaleForWordSize(4*M), \ 3031 "Initial tenured generation size (in bytes)") \ 3032 \ 3033 product(uintx, NewSize, ScaleForWordSize(1*M), \ 3034 "Initial new generation size (in bytes)") \ 3035 \ 3036 product(uintx, MaxNewSize, max_uintx, \ 3037 "Maximum new generation size (in bytes), max_uintx means set " \ 3038 "ergonomically") \ 3039 \ 3040 product(uintx, PretenureSizeThreshold, 0, \ 3041 "Maximum size in bytes of objects allocated in DefNew " \ 3042 "generation; zero means no maximum") \ 3043 \ 3044 product(uintx, TLABSize, 0, \ 3045 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3046 \ 3047 product(uintx, MinTLABSize, 2*K, \ 3048 "Minimum allowed TLAB size (in bytes)") \ 3049 \ 3050 product(uintx, TLABAllocationWeight, 35, \ 3051 "Allocation averaging weight") \ 3052 \ 3053 product(uintx, TLABWasteTargetPercent, 1, \ 3054 "Percentage of Eden that can be wasted") \ 3055 \ 3056 product(uintx, TLABRefillWasteFraction, 64, \ 3057 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3058 \ 3059 product(uintx, TLABWasteIncrement, 4, \ 3060 "Increment allowed waste at slow allocation") \ 3061 \ 3062 product(uintx, SurvivorRatio, 8, \ 3063 "Ratio of eden/survivor space size") \ 3064 \ 3065 product(uintx, NewRatio, 2, \ 3066 "Ratio of old/new generation sizes") \ 3067 \ 3068 product_pd(uintx, NewSizeThreadIncrease, \ 3069 "Additional size added to desired new generation size per " \ 3070 "non-daemon thread (in bytes)") \ 3071 \ 3072 product_pd(uintx, MetaspaceSize, \ 3073 "Initial size of Metaspaces (in bytes)") \ 3074 \ 3075 product(uintx, MaxMetaspaceSize, max_uintx, \ 3076 "Maximum size of Metaspaces (in bytes)") \ 3077 \ 3078 product(uintx, CompressedClassSpaceSize, 1*G, \ 3079 "Maximum size of class area in Metaspace when compressed " \ 3080 "class pointers are used") \ 3081 \ 3082 product(uintx, MinHeapFreeRatio, 40, \ 3083 "The minimum percentage of heap free after GC to avoid expansion")\ 3084 \ 3085 product(uintx, MaxHeapFreeRatio, 70, \ 3086 "The maximum percentage of heap free after GC to avoid shrinking")\ 3087 \ 3088 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3089 "Number of milliseconds per MB of free space in the heap") \ 3090 \ 3091 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3092 "The minimum change in heap space due to GC (in bytes)") \ 3093 \ 3094 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3095 "The minimum expansion of Metaspace (in bytes)") \ 3096 \ 3097 product(uintx, MinMetaspaceFreeRatio, 40, \ 3098 "The minimum percentage of Metaspace free after GC to avoid " \ 3099 "expansion") \ 3100 \ 3101 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3102 "The maximum percentage of Metaspace free after GC to avoid " \ 3103 "shrinking") \ 3104 \ 3105 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3106 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3107 \ 3108 product(uintx, QueuedAllocationWarningCount, 0, \ 3109 "Number of times an allocation that queues behind a GC " \ 3110 "will retry before printing a warning") \ 3111 \ 3112 diagnostic(uintx, VerifyGCStartAt, 0, \ 3113 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3114 \ 3115 diagnostic(intx, VerifyGCLevel, 0, \ 3116 "Generation level at which to start +VerifyBefore/AfterGC") \ 3117 \ 3118 product(uintx, MaxTenuringThreshold, 15, \ 3119 "Maximum value for tenuring threshold") \ 3120 \ 3121 product(uintx, InitialTenuringThreshold, 7, \ 3122 "Initial value for tenuring threshold") \ 3123 \ 3124 product(uintx, TargetSurvivorRatio, 50, \ 3125 "Desired percentage of survivor space used after scavenge") \ 3126 \ 3127 product(uintx, MarkSweepDeadRatio, 5, \ 3128 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3129 "Serial mark sweep treats this as both the minimum and maximum " \ 3130 "value. " \ 3131 "CMS uses this value only if it falls back to mark sweep. " \ 3132 "Par compact uses a variable scale based on the density of the " \ 3133 "generation and treats this as the maximum value when the heap " \ 3134 "is either completely full or completely empty. Par compact " \ 3135 "also has a smaller default value; see arguments.cpp.") \ 3136 \ 3137 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3138 "How often should we fully compact the heap (ignoring the dead " \ 3139 "space parameters)") \ 3140 \ 3141 product(intx, PrintCMSStatistics, 0, \ 3142 "Statistics for CMS") \ 3143 \ 3144 product(bool, PrintCMSInitiationStatistics, false, \ 3145 "Statistics for initiating a CMS collection") \ 3146 \ 3147 product(intx, PrintFLSStatistics, 0, \ 3148 "Statistics for CMS' FreeListSpace") \ 3149 \ 3150 product(intx, PrintFLSCensus, 0, \ 3151 "Census for CMS' FreeListSpace") \ 3152 \ 3153 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3154 "Delay between expansion and allocation (in milliseconds)") \ 3155 \ 3156 develop(uintx, GCWorkerDelayMillis, 0, \ 3157 "Delay in scheduling GC workers (in milliseconds)") \ 3158 \ 3159 product(intx, DeferThrSuspendLoopCount, 4000, \ 3160 "(Unstable) Number of times to iterate in safepoint loop " \ 3161 "before blocking VM threads ") \ 3162 \ 3163 product(intx, DeferPollingPageLoopCount, -1, \ 3164 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3165 "before changing safepoint polling page to RO ") \ 3166 \ 3167 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3168 \ 3169 product(bool, PSChunkLargeArrays, true, \ 3170 "Process large arrays in chunks") \ 3171 \ 3172 product(uintx, GCDrainStackTargetSize, 64, \ 3173 "Number of entries we will try to leave on the stack " \ 3174 "during parallel gc") \ 3175 \ 3176 /* stack parameters */ \ 3177 product_pd(intx, StackYellowPages, \ 3178 "Number of yellow zone (recoverable overflows) pages") \ 3179 \ 3180 product_pd(intx, StackRedPages, \ 3181 "Number of red zone (unrecoverable overflows) pages") \ 3182 \ 3183 product_pd(intx, StackShadowPages, \ 3184 "Number of shadow zone (for overflow checking) pages " \ 3185 "this should exceed the depth of the VM and native call stack") \ 3186 \ 3187 product_pd(intx, ThreadStackSize, \ 3188 "Thread Stack Size (in Kbytes)") \ 3189 \ 3190 product_pd(intx, VMThreadStackSize, \ 3191 "Non-Java Thread Stack Size (in Kbytes)") \ 3192 \ 3193 product_pd(intx, CompilerThreadStackSize, \ 3194 "Compiler Thread Stack Size (in Kbytes)") \ 3195 \ 3196 develop_pd(uintx, JVMInvokeMethodSlack, \ 3197 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3198 \ 3199 product(uintx, ThreadSafetyMargin, 50*M, \ 3200 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3201 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3202 "disable this feature") \ 3203 \ 3204 /* code cache parameters */ \ 3205 develop(uintx, CodeCacheSegmentSize, 64, \ 3206 "Code cache segment size (in bytes) - smallest unit of " \ 3207 "allocation") \ 3208 \ 3209 develop_pd(intx, CodeEntryAlignment, \ 3210 "Code entry alignment for generated code (in bytes)") \ 3211 \ 3212 product_pd(intx, OptoLoopAlignment, \ 3213 "Align inner loops to zero relative to this modulus") \ 3214 \ 3215 product_pd(uintx, InitialCodeCacheSize, \ 3216 "Initial code cache size (in bytes)") \ 3217 \ 3218 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3219 "Minimum code cache size (in bytes) required to start VM.") \ 3220 \ 3221 product_pd(uintx, ReservedCodeCacheSize, \ 3222 "Reserved code cache size (in bytes) - maximum code cache size") \ 3223 \ 3224 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3225 "When less than X space left, we stop compiling") \ 3226 \ 3227 product_pd(uintx, CodeCacheExpansionSize, \ 3228 "Code cache expansion size (in bytes)") \ 3229 \ 3230 develop_pd(uintx, CodeCacheMinBlockLength, \ 3231 "Minimum number of segments in a code cache block") \ 3232 \ 3233 notproduct(bool, ExitOnFullCodeCache, false, \ 3234 "Exit the VM if we fill the code cache") \ 3235 \ 3236 product(bool, UseCodeCacheFlushing, true, \ 3237 "Attempt to clean the code cache before shutting off compiler") \ 3238 \ 3239 product(intx, MinCodeCacheFlushingInterval, 30, \ 3240 "Minimum number of seconds between code cache cleaning sessions") \ 3241 \ 3242 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3243 "When less than X space left, start code cache cleaning") \ 3244 \ 3245 product(uintx, CodeCacheFlushingFraction, 2, \ 3246 "Fraction of the code cache that is flushed when full") \ 3247 \ 3248 /* interpreter debugging */ \ 3249 develop(intx, BinarySwitchThreshold, 5, \ 3250 "Minimal number of lookupswitch entries for rewriting to binary " \ 3251 "switch") \ 3252 \ 3253 develop(intx, StopInterpreterAt, 0, \ 3254 "Stop interpreter execution at specified bytecode number") \ 3255 \ 3256 develop(intx, TraceBytecodesAt, 0, \ 3257 "Trace bytecodes starting with specified bytecode number") \ 3258 \ 3259 /* compiler interface */ \ 3260 develop(intx, CIStart, 0, \ 3261 "The id of the first compilation to permit") \ 3262 \ 3263 develop(intx, CIStop, -1, \ 3264 "The id of the last compilation to permit") \ 3265 \ 3266 develop(intx, CIStartOSR, 0, \ 3267 "The id of the first osr compilation to permit " \ 3268 "(CICountOSR must be on)") \ 3269 \ 3270 develop(intx, CIStopOSR, -1, \ 3271 "The id of the last osr compilation to permit " \ 3272 "(CICountOSR must be on)") \ 3273 \ 3274 develop(intx, CIBreakAtOSR, -1, \ 3275 "The id of osr compilation to break at") \ 3276 \ 3277 develop(intx, CIBreakAt, -1, \ 3278 "The id of compilation to break at") \ 3279 \ 3280 product(ccstrlist, CompileOnly, "", \ 3281 "List of methods (pkg/class.name) to restrict compilation to") \ 3282 \ 3283 product(ccstr, CompileCommandFile, NULL, \ 3284 "Read compiler commands from this file [.hotspot_compiler]") \ 3285 \ 3286 product(ccstrlist, CompileCommand, "", \ 3287 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3288 \ 3289 develop(bool, ReplayCompiles, false, \ 3290 "Enable replay of compilations from ReplayDataFile") \ 3291 \ 3292 product(ccstr, ReplayDataFile, NULL, \ 3293 "File containing compilation replay information" \ 3294 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3295 \ 3296 develop(intx, ReplaySuppressInitializers, 2, \ 3297 "Control handling of class initialization during replay: " \ 3298 "0 - don't do anything special; " \ 3299 "1 - treat all class initializers as empty; " \ 3300 "2 - treat class initializers for application classes as empty; " \ 3301 "3 - allow all class initializers to run during bootstrap but " \ 3302 " pretend they are empty after starting replay") \ 3303 \ 3304 develop(bool, ReplayIgnoreInitErrors, false, \ 3305 "Ignore exceptions thrown during initialization for replay") \ 3306 \ 3307 product(bool, DumpReplayDataOnError, true, \ 3308 "Record replay data for crashing compiler threads") \ 3309 \ 3310 product(bool, CICompilerCountPerCPU, false, \ 3311 "1 compiler thread for log(N CPUs)") \ 3312 \ 3313 develop(intx, CIFireOOMAt, -1, \ 3314 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3315 "(non-negative value throws OOM after this many CI accesses " \ 3316 "in each compile)") \ 3317 notproduct(intx, CICrashAt, -1, \ 3318 "id of compilation to trigger assert in compiler thread for " \ 3319 "the purpose of testing, e.g. generation of replay data") \ 3320 notproduct(bool, CIObjectFactoryVerify, false, \ 3321 "enable potentially expensive verification in ciObjectFactory") \ 3322 \ 3323 /* Priorities */ \ 3324 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3325 \ 3326 product(intx, ThreadPriorityPolicy, 0, \ 3327 "0 : Normal. "\ 3328 " VM chooses priorities that are appropriate for normal "\ 3329 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3330 " to normal native priority. Java priorities below " \ 3331 " NORM_PRIORITY map to lower native priority values. On "\ 3332 " Windows applications are allowed to use higher native "\ 3333 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3334 " not use the highest possible native priority, "\ 3335 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3336 " system threads. On Linux thread priorities are ignored "\ 3337 " because the OS does not support static priority in "\ 3338 " SCHED_OTHER scheduling class which is the only choice for "\ 3339 " non-root, non-realtime applications. "\ 3340 "1 : Aggressive. "\ 3341 " Java thread priorities map over to the entire range of "\ 3342 " native thread priorities. Higher Java thread priorities map "\ 3343 " to higher native thread priorities. This policy should be "\ 3344 " used with care, as sometimes it can cause performance "\ 3345 " degradation in the application and/or the entire system. On "\ 3346 " Linux this policy requires root privilege.") \ 3347 \ 3348 product(bool, ThreadPriorityVerbose, false, \ 3349 "Print priority changes") \ 3350 \ 3351 product(intx, DefaultThreadPriority, -1, \ 3352 "The native priority at which threads run if not elsewhere " \ 3353 "specified (-1 means no change)") \ 3354 \ 3355 product(intx, CompilerThreadPriority, -1, \ 3356 "The native priority at which compiler threads should run " \ 3357 "(-1 means no change)") \ 3358 \ 3359 product(intx, VMThreadPriority, -1, \ 3360 "The native priority at which the VM thread should run " \ 3361 "(-1 means no change)") \ 3362 \ 3363 product(bool, CompilerThreadHintNoPreempt, true, \ 3364 "(Solaris only) Give compiler threads an extra quanta") \ 3365 \ 3366 product(bool, VMThreadHintNoPreempt, false, \ 3367 "(Solaris only) Give VM thread an extra quanta") \ 3368 \ 3369 product(intx, JavaPriority1_To_OSPriority, -1, \ 3370 "Map Java priorities to OS priorities") \ 3371 \ 3372 product(intx, JavaPriority2_To_OSPriority, -1, \ 3373 "Map Java priorities to OS priorities") \ 3374 \ 3375 product(intx, JavaPriority3_To_OSPriority, -1, \ 3376 "Map Java priorities to OS priorities") \ 3377 \ 3378 product(intx, JavaPriority4_To_OSPriority, -1, \ 3379 "Map Java priorities to OS priorities") \ 3380 \ 3381 product(intx, JavaPriority5_To_OSPriority, -1, \ 3382 "Map Java priorities to OS priorities") \ 3383 \ 3384 product(intx, JavaPriority6_To_OSPriority, -1, \ 3385 "Map Java priorities to OS priorities") \ 3386 \ 3387 product(intx, JavaPriority7_To_OSPriority, -1, \ 3388 "Map Java priorities to OS priorities") \ 3389 \ 3390 product(intx, JavaPriority8_To_OSPriority, -1, \ 3391 "Map Java priorities to OS priorities") \ 3392 \ 3393 product(intx, JavaPriority9_To_OSPriority, -1, \ 3394 "Map Java priorities to OS priorities") \ 3395 \ 3396 product(intx, JavaPriority10_To_OSPriority,-1, \ 3397 "Map Java priorities to OS priorities") \ 3398 \ 3399 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3400 "Java thread priority 10 maps to critical scheduling priority") \ 3401 \ 3402 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3403 "Compiler thread(s) run at critical scheduling priority") \ 3404 \ 3405 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3406 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3407 \ 3408 /* compiler debugging */ \ 3409 notproduct(intx, CompileTheWorldStartAt, 1, \ 3410 "First class to consider when using +CompileTheWorld") \ 3411 \ 3412 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3413 "Last class to consider when using +CompileTheWorld") \ 3414 \ 3415 develop(intx, NewCodeParameter, 0, \ 3416 "Testing Only: Create a dedicated integer parameter before " \ 3417 "putback") \ 3418 \ 3419 /* new oopmap storage allocation */ \ 3420 develop(intx, MinOopMapAllocation, 8, \ 3421 "Minimum number of OopMap entries in an OopMapSet") \ 3422 \ 3423 /* Background Compilation */ \ 3424 develop(intx, LongCompileThreshold, 50, \ 3425 "Used with +TraceLongCompiles") \ 3426 \ 3427 product(intx, StarvationMonitorInterval, 200, \ 3428 "Pause between each check (in milliseconds)") \ 3429 \ 3430 /* recompilation */ \ 3431 product_pd(intx, CompileThreshold, \ 3432 "number of interpreted method invocations before (re-)compiling") \ 3433 \ 3434 product_pd(intx, BackEdgeThreshold, \ 3435 "Interpreter Back edge threshold at which an OSR compilation is " \ 3436 "invoked") \ 3437 \ 3438 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3439 "Interpreter (tier 0) invocation notification frequency") \ 3440 \ 3441 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3442 "C1 without MDO (tier 2) invocation notification frequency") \ 3443 \ 3444 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3445 "C1 with MDO profiling (tier 3) invocation notification " \ 3446 "frequency") \ 3447 \ 3448 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3449 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3450 \ 3451 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3452 "Interpreter (tier 0) invocation notification frequency") \ 3453 \ 3454 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3455 "C1 without MDO (tier 2) invocation notification frequency") \ 3456 \ 3457 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3458 "C1 with MDO profiling (tier 3) invocation notification " \ 3459 "frequency") \ 3460 \ 3461 product(intx, Tier2CompileThreshold, 0, \ 3462 "threshold at which tier 2 compilation is invoked") \ 3463 \ 3464 product(intx, Tier2BackEdgeThreshold, 0, \ 3465 "Back edge threshold at which tier 2 compilation is invoked") \ 3466 \ 3467 product(intx, Tier3InvocationThreshold, 200, \ 3468 "Compile if number of method invocations crosses this " \ 3469 "threshold") \ 3470 \ 3471 product(intx, Tier3MinInvocationThreshold, 100, \ 3472 "Minimum invocation to compile at tier 3") \ 3473 \ 3474 product(intx, Tier3CompileThreshold, 2000, \ 3475 "Threshold at which tier 3 compilation is invoked (invocation " \ 3476 "minimum must be satisfied") \ 3477 \ 3478 product(intx, Tier3BackEdgeThreshold, 60000, \ 3479 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3480 \ 3481 product(intx, Tier4InvocationThreshold, 5000, \ 3482 "Compile if number of method invocations crosses this " \ 3483 "threshold") \ 3484 \ 3485 product(intx, Tier4MinInvocationThreshold, 600, \ 3486 "Minimum invocation to compile at tier 4") \ 3487 \ 3488 product(intx, Tier4CompileThreshold, 15000, \ 3489 "Threshold at which tier 4 compilation is invoked (invocation " \ 3490 "minimum must be satisfied") \ 3491 \ 3492 product(intx, Tier4BackEdgeThreshold, 40000, \ 3493 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3494 \ 3495 product(intx, Tier3DelayOn, 5, \ 3496 "If C2 queue size grows over this amount per compiler thread " \ 3497 "stop compiling at tier 3 and start compiling at tier 2") \ 3498 \ 3499 product(intx, Tier3DelayOff, 2, \ 3500 "If C2 queue size is less than this amount per compiler thread " \ 3501 "allow methods compiled at tier 2 transition to tier 3") \ 3502 \ 3503 product(intx, Tier3LoadFeedback, 5, \ 3504 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3505 "reaches this amount per compiler thread") \ 3506 \ 3507 product(intx, Tier4LoadFeedback, 3, \ 3508 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3509 "reaches this amount per compiler thread") \ 3510 \ 3511 product(intx, TieredCompileTaskTimeout, 50, \ 3512 "Kill compile task if method was not used within " \ 3513 "given timeout in milliseconds") \ 3514 \ 3515 product(intx, TieredStopAtLevel, 4, \ 3516 "Stop at given compilation level") \ 3517 \ 3518 product(intx, Tier0ProfilingStartPercentage, 200, \ 3519 "Start profiling in interpreter if the counters exceed tier 3 " \ 3520 "thresholds by the specified percentage") \ 3521 \ 3522 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3523 "Increase the compile threshold for C1 compilation if the code " \ 3524 "cache is filled by the specified percentage") \ 3525 \ 3526 product(intx, TieredRateUpdateMinTime, 1, \ 3527 "Minimum rate sampling interval (in milliseconds)") \ 3528 \ 3529 product(intx, TieredRateUpdateMaxTime, 25, \ 3530 "Maximum rate sampling interval (in milliseconds)") \ 3531 \ 3532 product_pd(bool, TieredCompilation, \ 3533 "Enable tiered compilation") \ 3534 \ 3535 product(bool, PrintTieredEvents, false, \ 3536 "Print tiered events notifications") \ 3537 \ 3538 product_pd(intx, OnStackReplacePercentage, \ 3539 "NON_TIERED number of method invocations/branches (expressed as " \ 3540 "% of CompileThreshold) before (re-)compiling OSR code") \ 3541 \ 3542 product(intx, InterpreterProfilePercentage, 33, \ 3543 "NON_TIERED number of method invocations/branches (expressed as " \ 3544 "% of CompileThreshold) before profiling in the interpreter") \ 3545 \ 3546 develop(intx, MaxRecompilationSearchLength, 10, \ 3547 "The maximum number of frames to inspect when searching for " \ 3548 "recompilee") \ 3549 \ 3550 develop(intx, MaxInterpretedSearchLength, 3, \ 3551 "The maximum number of interpreted frames to skip when searching "\ 3552 "for recompilee") \ 3553 \ 3554 develop(intx, DesiredMethodLimit, 8000, \ 3555 "The desired maximum method size (in bytecodes) after inlining") \ 3556 \ 3557 develop(intx, HugeMethodLimit, 8000, \ 3558 "Don't compile methods larger than this if " \ 3559 "+DontCompileHugeMethods") \ 3560 \ 3561 /* New JDK 1.4 reflection implementation */ \ 3562 \ 3563 develop(bool, UseNewReflection, true, \ 3564 "Temporary flag for transition to reflection based on dynamic " \ 3565 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3566 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3567 "changes were needed") \ 3568 \ 3569 develop(bool, VerifyReflectionBytecodes, false, \ 3570 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3571 "in situations like that described in 4486457 or for " \ 3572 "constructors generated for serialization, so can not be enabled "\ 3573 "in product.") \ 3574 \ 3575 product(bool, ReflectionWrapResolutionErrors, true, \ 3576 "Temporary flag for transition to AbstractMethodError wrapped " \ 3577 "in InvocationTargetException. See 6531596") \ 3578 \ 3579 develop(bool, VerifyLambdaBytecodes, false, \ 3580 "Force verification of jdk 8 lambda metafactory bytecodes") \ 3581 \ 3582 develop(intx, FastSuperclassLimit, 8, \ 3583 "Depth of hardwired instanceof accelerator array") \ 3584 \ 3585 /* Properties for Java libraries */ \ 3586 \ 3587 product(uintx, MaxDirectMemorySize, 0, \ 3588 "Maximum total size of NIO direct-buffer allocations") \ 3589 \ 3590 /* temporary developer defined flags */ \ 3591 \ 3592 diagnostic(bool, UseNewCode, false, \ 3593 "Testing Only: Use the new version while testing") \ 3594 \ 3595 diagnostic(bool, UseNewCode2, false, \ 3596 "Testing Only: Use the new version while testing") \ 3597 \ 3598 diagnostic(bool, UseNewCode3, false, \ 3599 "Testing Only: Use the new version while testing") \ 3600 \ 3601 /* flags for performance data collection */ \ 3602 \ 3603 product(bool, UsePerfData, falseInEmbedded, \ 3604 "Flag to disable jvmstat instrumentation for performance testing "\ 3605 "and problem isolation purposes") \ 3606 \ 3607 product(bool, PerfDataSaveToFile, false, \ 3608 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3609 \ 3610 product(ccstr, PerfDataSaveFile, NULL, \ 3611 "Save PerfData memory to the specified absolute pathname. " \ 3612 "The string %p in the file name (if present) " \ 3613 "will be replaced by pid") \ 3614 \ 3615 product(intx, PerfDataSamplingInterval, 50, \ 3616 "Data sampling interval (in milliseconds)") \ 3617 \ 3618 develop(bool, PerfTraceDataCreation, false, \ 3619 "Trace creation of Performance Data Entries") \ 3620 \ 3621 develop(bool, PerfTraceMemOps, false, \ 3622 "Trace PerfMemory create/attach/detach calls") \ 3623 \ 3624 product(bool, PerfDisableSharedMem, false, \ 3625 "Store performance data in standard memory") \ 3626 \ 3627 product(intx, PerfDataMemorySize, 32*K, \ 3628 "Size of performance data memory region. Will be rounded " \ 3629 "up to a multiple of the native os page size.") \ 3630 \ 3631 product(intx, PerfMaxStringConstLength, 1024, \ 3632 "Maximum PerfStringConstant string length before truncation") \ 3633 \ 3634 product(bool, PerfAllowAtExitRegistration, false, \ 3635 "Allow registration of atexit() methods") \ 3636 \ 3637 product(bool, PerfBypassFileSystemCheck, false, \ 3638 "Bypass Win32 file system criteria checks (Windows Only)") \ 3639 \ 3640 product(intx, UnguardOnExecutionViolation, 0, \ 3641 "Unguard page and retry on no-execute fault (Win32 only) " \ 3642 "0=off, 1=conservative, 2=aggressive") \ 3643 \ 3644 /* Serviceability Support */ \ 3645 \ 3646 product(bool, ManagementServer, false, \ 3647 "Create JMX Management Server") \ 3648 \ 3649 product(bool, DisableAttachMechanism, false, \ 3650 "Disable mechanism that allows tools to attach to this VM") \ 3651 \ 3652 product(bool, StartAttachListener, false, \ 3653 "Always start Attach Listener at VM startup") \ 3654 \ 3655 manageable(bool, PrintConcurrentLocks, false, \ 3656 "Print java.util.concurrent locks in thread dump") \ 3657 \ 3658 product(bool, TransmitErrorReport, false, \ 3659 "Enable error report transmission on erroneous termination") \ 3660 \ 3661 product(ccstr, ErrorReportServer, NULL, \ 3662 "Override built-in error report server address") \ 3663 \ 3664 /* Shared spaces */ \ 3665 \ 3666 product(bool, UseSharedSpaces, true, \ 3667 "Use shared spaces for metadata") \ 3668 \ 3669 product(bool, RequireSharedSpaces, false, \ 3670 "Require shared spaces for metadata") \ 3671 \ 3672 product(bool, DumpSharedSpaces, false, \ 3673 "Special mode: JVM reads a class list, loads classes, builds " \ 3674 "shared spaces, and dumps the shared spaces to a file to be " \ 3675 "used in future JVM runs") \ 3676 \ 3677 product(bool, PrintSharedSpaces, false, \ 3678 "Print usage of shared spaces") \ 3679 \ 3680 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3681 "Size of read-write space for metadata (in bytes)") \ 3682 \ 3683 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3684 "Size of read-only space for metadata (in bytes)") \ 3685 \ 3686 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3687 "Size of the shared miscellaneous data area (in bytes)") \ 3688 \ 3689 product(uintx, SharedMiscCodeSize, 120*K, \ 3690 "Size of the shared miscellaneous code area (in bytes)") \ 3691 \ 3692 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \ 3693 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 3694 "Address to allocate shared memory region for class data") \ 3695 \ 3696 diagnostic(bool, EnableInvokeDynamic, true, \ 3697 "support JSR 292 (method handles, invokedynamic, " \ 3698 "anonymous classes") \ 3699 \ 3700 diagnostic(bool, PrintMethodHandleStubs, false, \ 3701 "Print generated stub code for method handles") \ 3702 \ 3703 develop(bool, TraceMethodHandles, false, \ 3704 "trace internal method handle operations") \ 3705 \ 3706 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3707 "perform extra checks when constructing method handles") \ 3708 \ 3709 diagnostic(bool, ShowHiddenFrames, false, \ 3710 "show method handle implementation frames (usually hidden)") \ 3711 \ 3712 experimental(bool, TrustFinalNonStaticFields, false, \ 3713 "trust final non-static declarations for constant folding") \ 3714 \ 3715 experimental(bool, FoldStableValues, false, \ 3716 "Private flag to control optimizations for stable variables") \ 3717 \ 3718 develop(bool, TraceInvokeDynamic, false, \ 3719 "trace internal invoke dynamic operations") \ 3720 \ 3721 diagnostic(bool, PauseAtStartup, false, \ 3722 "Causes the VM to pause at startup time and wait for the pause " \ 3723 "file to be removed (default: ./vm.paused.<pid>)") \ 3724 \ 3725 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3726 "The file to create and for whose removal to await when pausing " \ 3727 "at startup. (default: ./vm.paused.<pid>)") \ 3728 \ 3729 diagnostic(bool, PauseAtExit, false, \ 3730 "Pause and wait for keypress on exit if a debugger is attached") \ 3731 \ 3732 product(bool, ExtendedDTraceProbes, false, \ 3733 "Enable performance-impacting dtrace probes") \ 3734 \ 3735 product(bool, DTraceMethodProbes, false, \ 3736 "Enable dtrace probes for method-entry and method-exit") \ 3737 \ 3738 product(bool, DTraceAllocProbes, false, \ 3739 "Enable dtrace probes for object allocation") \ 3740 \ 3741 product(bool, DTraceMonitorProbes, false, \ 3742 "Enable dtrace probes for monitor events") \ 3743 \ 3744 product(bool, RelaxAccessControlCheck, false, \ 3745 "Relax the access control checks in the verifier") \ 3746 \ 3747 diagnostic(bool, PrintDTraceDOF, false, \ 3748 "Print the DTrace DOF passed to the system for JSDT probes") \ 3749 \ 3750 product(uintx, StringTableSize, defaultStringTableSize, \ 3751 "Number of buckets in the interned String table") \ 3752 \ 3753 develop(bool, TraceDefaultMethods, false, \ 3754 "Trace the default method processing steps") \ 3755 \ 3756 develop(bool, VerifyGenericSignatures, false, \ 3757 "Abort VM on erroneous or inconsistent generic signatures") \ 3758 \ 3759 product(bool, UseVMInterruptibleIO, false, \ 3760 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3761 "EINTR for I/O operations results in OS_INTRPT. The default " \ 3762 "value of this flag is true for JDK 6 and earlier") \ 3763 \ 3764 diagnostic(bool, WhiteBoxAPI, false, \ 3765 "Enable internal testing APIs") \ 3766 \ 3767 product(bool, PrintGCCause, true, \ 3768 "Include GC cause in GC logging") \ 3769 \ 3770 product(bool , AllowNonVirtualCalls, false, \ 3771 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 3772 \ 3773 diagnostic(ccstr, SharedArchiveFile, NULL, \ 3774 "Override the default location of the CDS archive file") \ 3775 \ 3776 experimental(uintx, ArrayAllocatorMallocLimit, \ 3777 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \ 3778 "Allocation less than this value will be allocated " \ 3779 "using malloc. Larger allocations will use mmap.") \ 3780 \ 3781 product(bool, EnableTracing, false, \ 3782 "Enable event-based tracing") \ 3783 \ 3784 product(bool, UseLockedTracing, false, \ 3785 "Use locked-tracing when doing event-based tracing") 3786 3787 3788/* 3789 * Macros for factoring of globals 3790 */ 3791 3792// Interface macros 3793#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3794#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3795#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3796#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3797#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3798#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3799#ifdef PRODUCT 3800#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3801#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3802#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3803#else 3804#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3805#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3806#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3807#endif 3808// Special LP64 flags, product only needed for now. 3809#ifdef _LP64 3810#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3811#else 3812#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3813#endif // _LP64 3814 3815// Implementation macros 3816#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3817#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3818#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3819#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3820#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3821#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3822#ifdef PRODUCT 3823#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3824#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3825#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3826#else 3827#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3828#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3829#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3830#endif 3831#ifdef _LP64 3832#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3833#else 3834#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3835#endif // _LP64 3836 3837RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG) 3838 3839RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3840 3841ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG) 3842 3843// Extensions 3844 3845#include "runtime/globals_ext.hpp" 3846 3847#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3848