globals.hpp revision 5426:b4d8a3d4db73
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 develop(bool, TracePageSizes, false, \ 506 "Trace page size selection and usage") \ 507 \ 508 product(bool, UseNUMA, false, \ 509 "Use NUMA if available") \ 510 \ 511 product(bool, UseNUMAInterleaving, false, \ 512 "Interleave memory across NUMA nodes if available") \ 513 \ 514 product(uintx, NUMAInterleaveGranularity, 2*M, \ 515 "Granularity to use for NUMA interleaving on Windows OS") \ 516 \ 517 product(bool, ForceNUMA, false, \ 518 "Force NUMA optimizations on single-node/UMA systems") \ 519 \ 520 product(uintx, NUMAChunkResizeWeight, 20, \ 521 "Percentage (0-100) used to weigh the current sample when " \ 522 "computing exponentially decaying average for " \ 523 "AdaptiveNUMAChunkSizing") \ 524 \ 525 product(uintx, NUMASpaceResizeRate, 1*G, \ 526 "Do not reallocate more than this amount per collection") \ 527 \ 528 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 529 "Enable adaptive chunk sizing for NUMA") \ 530 \ 531 product(bool, NUMAStats, false, \ 532 "Print NUMA stats in detailed heap information") \ 533 \ 534 product(uintx, NUMAPageScanRate, 256, \ 535 "Maximum number of pages to include in the page scan procedure") \ 536 \ 537 product_pd(bool, NeedsDeoptSuspend, \ 538 "True for register window machines (sparc/ia64)") \ 539 \ 540 product(intx, UseSSE, 99, \ 541 "Highest supported SSE instructions set on x86/x64") \ 542 \ 543 product(bool, UseAES, false, \ 544 "Control whether AES instructions can be used on x86/x64") \ 545 \ 546 product(uintx, LargePageSizeInBytes, 0, \ 547 "Large page size (0 to let VM choose the page size)") \ 548 \ 549 product(uintx, LargePageHeapSizeThreshold, 128*M, \ 550 "Use large pages if maximum heap is at least this big") \ 551 \ 552 product(bool, ForceTimeHighResolution, false, \ 553 "Using high time resolution (for Win32 only)") \ 554 \ 555 develop(bool, TraceItables, false, \ 556 "Trace initialization and use of itables") \ 557 \ 558 develop(bool, TracePcPatching, false, \ 559 "Trace usage of frame::patch_pc") \ 560 \ 561 develop(bool, TraceJumps, false, \ 562 "Trace assembly jumps in thread ring buffer") \ 563 \ 564 develop(bool, TraceRelocator, false, \ 565 "Trace the bytecode relocator") \ 566 \ 567 develop(bool, TraceLongCompiles, false, \ 568 "Print out every time compilation is longer than " \ 569 "a given threshold") \ 570 \ 571 develop(bool, SafepointALot, false, \ 572 "Generate a lot of safepoints. This works with " \ 573 "GuaranteedSafepointInterval") \ 574 \ 575 product_pd(bool, BackgroundCompilation, \ 576 "A thread requesting compilation is not blocked during " \ 577 "compilation") \ 578 \ 579 product(bool, PrintVMQWaitTime, false, \ 580 "Print out the waiting time in VM operation queue") \ 581 \ 582 develop(bool, NoYieldsInMicrolock, false, \ 583 "Disable yields in microlock") \ 584 \ 585 develop(bool, TraceOopMapGeneration, false, \ 586 "Show OopMapGeneration") \ 587 \ 588 product(bool, MethodFlushing, true, \ 589 "Reclamation of zombie and not-entrant methods") \ 590 \ 591 develop(bool, VerifyStack, false, \ 592 "Verify stack of each thread when it is entering a runtime call") \ 593 \ 594 diagnostic(bool, ForceUnreachable, false, \ 595 "Make all non code cache addresses to be unreachable by " \ 596 "forcing use of 64bit literal fixups") \ 597 \ 598 notproduct(bool, StressDerivedPointers, false, \ 599 "Force scavenge when a derived pointer is detected on stack " \ 600 "after rtm call") \ 601 \ 602 develop(bool, TraceDerivedPointers, false, \ 603 "Trace traversal of derived pointers on stack") \ 604 \ 605 notproduct(bool, TraceCodeBlobStacks, false, \ 606 "Trace stack-walk of codeblobs") \ 607 \ 608 product(bool, PrintJNIResolving, false, \ 609 "Used to implement -v:jni") \ 610 \ 611 notproduct(bool, PrintRewrites, false, \ 612 "Print methods that are being rewritten") \ 613 \ 614 product(bool, UseInlineCaches, true, \ 615 "Use Inline Caches for virtual calls ") \ 616 \ 617 develop(bool, InlineArrayCopy, true, \ 618 "Inline arraycopy native that is known to be part of " \ 619 "base library DLL") \ 620 \ 621 develop(bool, InlineObjectHash, true, \ 622 "Inline Object::hashCode() native that is known to be part " \ 623 "of base library DLL") \ 624 \ 625 develop(bool, InlineNatives, true, \ 626 "Inline natives that are known to be part of base library DLL") \ 627 \ 628 develop(bool, InlineMathNatives, true, \ 629 "Inline SinD, CosD, etc.") \ 630 \ 631 develop(bool, InlineClassNatives, true, \ 632 "Inline Class.isInstance, etc") \ 633 \ 634 develop(bool, InlineThreadNatives, true, \ 635 "Inline Thread.currentThread, etc") \ 636 \ 637 develop(bool, InlineUnsafeOps, true, \ 638 "Inline memory ops (native methods) from sun.misc.Unsafe") \ 639 \ 640 product(bool, CriticalJNINatives, true, \ 641 "Check for critical JNI entry points") \ 642 \ 643 notproduct(bool, StressCriticalJNINatives, false, \ 644 "Exercise register saving code in critical natives") \ 645 \ 646 product(bool, UseSSE42Intrinsics, false, \ 647 "SSE4.2 versions of intrinsics") \ 648 \ 649 product(bool, UseAESIntrinsics, false, \ 650 "Use intrinsics for AES versions of crypto") \ 651 \ 652 product(bool, UseCRC32Intrinsics, false, \ 653 "use intrinsics for java.util.zip.CRC32") \ 654 \ 655 develop(bool, TraceCallFixup, false, \ 656 "Trace all call fixups") \ 657 \ 658 develop(bool, DeoptimizeALot, false, \ 659 "Deoptimize at every exit from the runtime system") \ 660 \ 661 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 662 "A comma separated list of bcis to deoptimize at") \ 663 \ 664 product(bool, DeoptimizeRandom, false, \ 665 "Deoptimize random frames on random exit from the runtime system")\ 666 \ 667 notproduct(bool, ZombieALot, false, \ 668 "Create zombies (non-entrant) at exit from the runtime system") \ 669 \ 670 product(bool, UnlinkSymbolsALot, false, \ 671 "Unlink unreferenced symbols from the symbol table at safepoints")\ 672 \ 673 notproduct(bool, WalkStackALot, false, \ 674 "Trace stack (no print) at every exit from the runtime system") \ 675 \ 676 product(bool, Debugging, false, \ 677 "Set when executing debug methods in debug.cpp " \ 678 "(to prevent triggering assertions)") \ 679 \ 680 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 681 "Enable strict checks that safepoints cannot happen for threads " \ 682 "that use No_Safepoint_Verifier") \ 683 \ 684 notproduct(bool, VerifyLastFrame, false, \ 685 "Verify oops on last frame on entry to VM") \ 686 \ 687 develop(bool, TraceHandleAllocation, false, \ 688 "Print out warnings when suspiciously many handles are allocated")\ 689 \ 690 product(bool, UseCompilerSafepoints, true, \ 691 "Stop at safepoints in compiled code") \ 692 \ 693 product(bool, FailOverToOldVerifier, true, \ 694 "Fail over to old verifier when split verifier fails") \ 695 \ 696 develop(bool, ShowSafepointMsgs, false, \ 697 "Show message about safepoint synchronization") \ 698 \ 699 product(bool, SafepointTimeout, false, \ 700 "Time out and warn or fail after SafepointTimeoutDelay " \ 701 "milliseconds if failed to reach safepoint") \ 702 \ 703 develop(bool, DieOnSafepointTimeout, false, \ 704 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 705 \ 706 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 707 /* typically, at most a few retries are needed */ \ 708 product(intx, SuspendRetryCount, 50, \ 709 "Maximum retry count for an external suspend request") \ 710 \ 711 product(intx, SuspendRetryDelay, 5, \ 712 "Milliseconds to delay per retry (* current_retry_count)") \ 713 \ 714 product(bool, AssertOnSuspendWaitFailure, false, \ 715 "Assert/Guarantee on external suspend wait failure") \ 716 \ 717 product(bool, TraceSuspendWaitFailures, false, \ 718 "Trace external suspend wait failures") \ 719 \ 720 product(bool, MaxFDLimit, true, \ 721 "Bump the number of file descriptors to maximum in Solaris") \ 722 \ 723 diagnostic(bool, LogEvents, true, \ 724 "Enable the various ring buffer event logs") \ 725 \ 726 diagnostic(uintx, LogEventsBufferEntries, 10, \ 727 "Number of ring buffer event logs") \ 728 \ 729 product(bool, BytecodeVerificationRemote, true, \ 730 "Enable the Java bytecode verifier for remote classes") \ 731 \ 732 product(bool, BytecodeVerificationLocal, false, \ 733 "Enable the Java bytecode verifier for local classes") \ 734 \ 735 develop(bool, ForceFloatExceptions, trueInDebug, \ 736 "Force exceptions on FP stack under/overflow") \ 737 \ 738 develop(bool, VerifyStackAtCalls, false, \ 739 "Verify that the stack pointer is unchanged after calls") \ 740 \ 741 develop(bool, TraceJavaAssertions, false, \ 742 "Trace java language assertions") \ 743 \ 744 notproduct(bool, CheckAssertionStatusDirectives, false, \ 745 "Temporary - see javaClasses.cpp") \ 746 \ 747 notproduct(bool, PrintMallocFree, false, \ 748 "Trace calls to C heap malloc/free allocation") \ 749 \ 750 product(bool, PrintOopAddress, false, \ 751 "Always print the location of the oop") \ 752 \ 753 notproduct(bool, VerifyCodeCacheOften, false, \ 754 "Verify compiled-code cache often") \ 755 \ 756 develop(bool, ZapDeadCompiledLocals, false, \ 757 "Zap dead locals in compiler frames") \ 758 \ 759 notproduct(bool, ZapDeadLocalsOld, false, \ 760 "Zap dead locals (old version, zaps all frames when " \ 761 "entering the VM") \ 762 \ 763 notproduct(bool, CheckOopishValues, false, \ 764 "Warn if value contains oop (requires ZapDeadLocals)") \ 765 \ 766 develop(bool, UseMallocOnly, false, \ 767 "Use only malloc/free for allocation (no resource area/arena)") \ 768 \ 769 develop(bool, PrintMalloc, false, \ 770 "Print all malloc/free calls") \ 771 \ 772 develop(bool, PrintMallocStatistics, false, \ 773 "Print malloc/free statistics") \ 774 \ 775 develop(bool, ZapResourceArea, trueInDebug, \ 776 "Zap freed resource/arena space with 0xABABABAB") \ 777 \ 778 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 779 "Zap freed VM handle space with 0xBCBCBCBC") \ 780 \ 781 develop(bool, ZapJNIHandleArea, trueInDebug, \ 782 "Zap freed JNI handle space with 0xFEFEFEFE") \ 783 \ 784 notproduct(bool, ZapStackSegments, trueInDebug, \ 785 "Zap allocated/freed stack segments with 0xFADFADED") \ 786 \ 787 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 788 "Zap unused heap space with 0xBAADBABE") \ 789 \ 790 develop(bool, TraceZapUnusedHeapArea, false, \ 791 "Trace zapping of unused heap space") \ 792 \ 793 develop(bool, CheckZapUnusedHeapArea, false, \ 794 "Check zapping of unused heap space") \ 795 \ 796 develop(bool, ZapFillerObjects, trueInDebug, \ 797 "Zap filler objects with 0xDEAFBABE") \ 798 \ 799 develop(bool, PrintVMMessages, true, \ 800 "Print VM messages on console") \ 801 \ 802 product(bool, PrintGCApplicationConcurrentTime, false, \ 803 "Print the time the application has been running") \ 804 \ 805 product(bool, PrintGCApplicationStoppedTime, false, \ 806 "Print the time the application has been stopped") \ 807 \ 808 diagnostic(bool, VerboseVerification, false, \ 809 "Display detailed verification details") \ 810 \ 811 notproduct(uintx, ErrorHandlerTest, 0, \ 812 "If > 0, provokes an error after VM initialization; the value " \ 813 "determines which error to provoke. See test_error_handler() " \ 814 "in debug.cpp.") \ 815 \ 816 develop(bool, Verbose, false, \ 817 "Print additional debugging information from other modes") \ 818 \ 819 develop(bool, PrintMiscellaneous, false, \ 820 "Print uncategorized debugging information (requires +Verbose)") \ 821 \ 822 develop(bool, WizardMode, false, \ 823 "Print much more debugging information") \ 824 \ 825 product(bool, ShowMessageBoxOnError, false, \ 826 "Keep process alive on VM fatal error") \ 827 \ 828 product(bool, CreateMinidumpOnCrash, false, \ 829 "Create minidump on VM fatal error") \ 830 \ 831 product_pd(bool, UseOSErrorReporting, \ 832 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 833 \ 834 product(bool, SuppressFatalErrorMessage, false, \ 835 "Report NO fatal error message (avoid deadlock)") \ 836 \ 837 product(ccstrlist, OnError, "", \ 838 "Run user-defined commands on fatal error; see VMError.cpp " \ 839 "for examples") \ 840 \ 841 product(ccstrlist, OnOutOfMemoryError, "", \ 842 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 843 \ 844 manageable(bool, HeapDumpBeforeFullGC, false, \ 845 "Dump heap to file before any major stop-the-world GC") \ 846 \ 847 manageable(bool, HeapDumpAfterFullGC, false, \ 848 "Dump heap to file after any major stop-the-world GC") \ 849 \ 850 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 851 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 852 \ 853 manageable(ccstr, HeapDumpPath, NULL, \ 854 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 855 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 856 "in the working directory)") \ 857 \ 858 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 859 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 860 "when the heap usage is larger than this") \ 861 \ 862 develop(uintx, HeapDumpSegmentSize, 1*G, \ 863 "Approximate segment size when generating a segmented heap dump") \ 864 \ 865 develop(bool, BreakAtWarning, false, \ 866 "Execute breakpoint upon encountering VM warning") \ 867 \ 868 develop(bool, TraceVMOperation, false, \ 869 "Trace VM operations") \ 870 \ 871 develop(bool, UseFakeTimers, false, \ 872 "Tell whether the VM should use system time or a fake timer") \ 873 \ 874 product(ccstr, NativeMemoryTracking, "off", \ 875 "Native memory tracking options") \ 876 \ 877 diagnostic(bool, PrintNMTStatistics, false, \ 878 "Print native memory tracking summary data if it is on") \ 879 \ 880 diagnostic(bool, AutoShutdownNMT, true, \ 881 "Automatically shutdown native memory tracking under stress " \ 882 "situations. When set to false, native memory tracking tries to " \ 883 "stay alive at the expense of JVM performance") \ 884 \ 885 diagnostic(bool, LogCompilation, false, \ 886 "Log compilation activity in detail to LogFile") \ 887 \ 888 product(bool, PrintCompilation, false, \ 889 "Print compilations") \ 890 \ 891 diagnostic(bool, TraceNMethodInstalls, false, \ 892 "Trace nmethod installation") \ 893 \ 894 diagnostic(intx, ScavengeRootsInCode, 2, \ 895 "0: do not allow scavengable oops in the code cache; " \ 896 "1: allow scavenging from the code cache; " \ 897 "2: emit as many constants as the compiler can see") \ 898 \ 899 product(bool, AlwaysRestoreFPU, false, \ 900 "Restore the FPU control word after every JNI call (expensive)") \ 901 \ 902 diagnostic(bool, PrintCompilation2, false, \ 903 "Print additional statistics per compilation") \ 904 \ 905 diagnostic(bool, PrintAdapterHandlers, false, \ 906 "Print code generated for i2c/c2i adapters") \ 907 \ 908 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 909 "Verify that i2c/c2i adapters are called properly") \ 910 \ 911 develop(bool, VerifyAdapterSharing, false, \ 912 "Verify that the code for shared adapters is the equivalent") \ 913 \ 914 diagnostic(bool, PrintAssembly, false, \ 915 "Print assembly code (using external disassembler.so)") \ 916 \ 917 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 918 "Print options string passed to disassembler.so") \ 919 \ 920 diagnostic(bool, PrintNMethods, false, \ 921 "Print assembly code for nmethods when generated") \ 922 \ 923 diagnostic(bool, PrintNativeNMethods, false, \ 924 "Print assembly code for native nmethods when generated") \ 925 \ 926 develop(bool, PrintDebugInfo, false, \ 927 "Print debug information for all nmethods when generated") \ 928 \ 929 develop(bool, PrintRelocations, false, \ 930 "Print relocation information for all nmethods when generated") \ 931 \ 932 develop(bool, PrintDependencies, false, \ 933 "Print dependency information for all nmethods when generated") \ 934 \ 935 develop(bool, PrintExceptionHandlers, false, \ 936 "Print exception handler tables for all nmethods when generated") \ 937 \ 938 develop(bool, StressCompiledExceptionHandlers, false, \ 939 "Exercise compiled exception handlers") \ 940 \ 941 develop(bool, InterceptOSException, false, \ 942 "Start debugger when an implicit OS (e.g. NULL) " \ 943 "exception happens") \ 944 \ 945 product(bool, PrintCodeCache, false, \ 946 "Print the code cache memory usage when exiting") \ 947 \ 948 develop(bool, PrintCodeCache2, false, \ 949 "Print detailed usage information on the code cache when exiting")\ 950 \ 951 product(bool, PrintCodeCacheOnCompilation, false, \ 952 "Print the code cache memory usage each time a method is " \ 953 "compiled") \ 954 \ 955 diagnostic(bool, PrintStubCode, false, \ 956 "Print generated stub code") \ 957 \ 958 product(bool, StackTraceInThrowable, true, \ 959 "Collect backtrace in throwable when exception happens") \ 960 \ 961 product(bool, OmitStackTraceInFastThrow, true, \ 962 "Omit backtraces for some 'hot' exceptions in optimized code") \ 963 \ 964 product(bool, ProfilerPrintByteCodeStatistics, false, \ 965 "Print bytecode statistics when dumping profiler output") \ 966 \ 967 product(bool, ProfilerRecordPC, false, \ 968 "Collect ticks for each 16 byte interval of compiled code") \ 969 \ 970 product(bool, ProfileVM, false, \ 971 "Profile ticks that fall within VM (either in the VM Thread " \ 972 "or VM code called through stubs)") \ 973 \ 974 product(bool, ProfileIntervals, false, \ 975 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 976 \ 977 notproduct(bool, ProfilerCheckIntervals, false, \ 978 "Collect and print information on spacing of profiler ticks") \ 979 \ 980 develop(bool, PrintJVMWarnings, false, \ 981 "Print warnings for unimplemented JVM functions") \ 982 \ 983 product(bool, PrintWarnings, true, \ 984 "Print JVM warnings to output stream") \ 985 \ 986 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 987 "Print warnings for stalled SpinLocks") \ 988 \ 989 product(bool, RegisterFinalizersAtInit, true, \ 990 "Register finalizable objects at end of Object.<init> or " \ 991 "after allocation") \ 992 \ 993 develop(bool, RegisterReferences, true, \ 994 "Tell whether the VM should register soft/weak/final/phantom " \ 995 "references") \ 996 \ 997 develop(bool, IgnoreRewrites, false, \ 998 "Suppress rewrites of bytecodes in the oopmap generator. " \ 999 "This is unsafe!") \ 1000 \ 1001 develop(bool, PrintCodeCacheExtension, false, \ 1002 "Print extension of code cache") \ 1003 \ 1004 develop(bool, UsePrivilegedStack, true, \ 1005 "Enable the security JVM functions") \ 1006 \ 1007 develop(bool, ProtectionDomainVerification, true, \ 1008 "Verify protection domain before resolution in system dictionary")\ 1009 \ 1010 product(bool, ClassUnloading, true, \ 1011 "Do unloading of classes") \ 1012 \ 1013 develop(bool, DisableStartThread, false, \ 1014 "Disable starting of additional Java threads " \ 1015 "(for debugging only)") \ 1016 \ 1017 develop(bool, MemProfiling, false, \ 1018 "Write memory usage profiling to log file") \ 1019 \ 1020 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1021 "Print the system dictionary at exit") \ 1022 \ 1023 experimental(intx, PredictedLoadedClassCount, 0, \ 1024 "Experimental: Tune loaded class cache starting size") \ 1025 \ 1026 diagnostic(bool, UnsyncloadClass, false, \ 1027 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1028 "class loader must call VM synchronized for findClass " \ 1029 "and defineClass.") \ 1030 \ 1031 product(bool, AlwaysLockClassLoader, false, \ 1032 "Require the VM to acquire the class loader lock before calling " \ 1033 "loadClass() even for class loaders registering " \ 1034 "as parallel capable") \ 1035 \ 1036 product(bool, AllowParallelDefineClass, false, \ 1037 "Allow parallel defineClass requests for class loaders " \ 1038 "registering as parallel capable") \ 1039 \ 1040 product(bool, MustCallLoadClassInternal, false, \ 1041 "Call loadClassInternal() rather than loadClass()") \ 1042 \ 1043 product_pd(bool, DontYieldALot, \ 1044 "Throw away obvious excess yield calls (for Solaris only)") \ 1045 \ 1046 product_pd(bool, ConvertSleepToYield, \ 1047 "Convert sleep(0) to thread yield " \ 1048 "(may be off for Solaris to improve GUI)") \ 1049 \ 1050 product(bool, ConvertYieldToSleep, false, \ 1051 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1052 "behavior (Solaris only)") \ 1053 \ 1054 product(bool, UseBoundThreads, true, \ 1055 "Bind user level threads to kernel threads (for Solaris only)") \ 1056 \ 1057 develop(bool, UseDetachedThreads, true, \ 1058 "Use detached threads that are recycled upon termination " \ 1059 "(for Solaris only)") \ 1060 \ 1061 product(bool, UseLWPSynchronization, true, \ 1062 "Use LWP-based instead of libthread-based synchronization " \ 1063 "(SPARC only)") \ 1064 \ 1065 product(ccstr, SyncKnobs, NULL, \ 1066 "(Unstable) Various monitor synchronization tunables") \ 1067 \ 1068 product(intx, EmitSync, 0, \ 1069 "(Unsafe, Unstable) " \ 1070 "Control emission of inline sync fast-path code") \ 1071 \ 1072 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1073 \ 1074 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1075 \ 1076 product(intx, SyncFlags, 0, "(Unsafe, Unstable) Experimental Sync flags") \ 1077 \ 1078 product(intx, SyncVerbose, 0, "(Unstable)") \ 1079 \ 1080 product(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1081 \ 1082 product(intx, hashCode, 5, \ 1083 "(Unstable) select hashCode generation algorithm") \ 1084 \ 1085 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1086 "(Unstable, Linux-specific) " \ 1087 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \ 1088 \ 1089 product(bool, FilterSpuriousWakeups, true, \ 1090 "Prevent spurious or premature wakeups from object.wait " \ 1091 "(Solaris only)") \ 1092 \ 1093 product(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1094 \ 1095 product(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1096 \ 1097 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1098 \ 1099 develop(bool, UsePthreads, false, \ 1100 "Use pthread-based instead of libthread-based synchronization " \ 1101 "(SPARC only)") \ 1102 \ 1103 product(bool, AdjustConcurrency, false, \ 1104 "Call thr_setconcurrency at thread creation time to avoid " \ 1105 "LWP starvation on MP systems (for Solaris Only)") \ 1106 \ 1107 product(bool, ReduceSignalUsage, false, \ 1108 "Reduce the use of OS signals in Java and/or the VM") \ 1109 \ 1110 develop_pd(bool, ShareVtableStubs, \ 1111 "Share vtable stubs (smaller code but worse branch prediction") \ 1112 \ 1113 develop(bool, LoadLineNumberTables, true, \ 1114 "Tell whether the class file parser loads line number tables") \ 1115 \ 1116 develop(bool, LoadLocalVariableTables, true, \ 1117 "Tell whether the class file parser loads local variable tables") \ 1118 \ 1119 develop(bool, LoadLocalVariableTypeTables, true, \ 1120 "Tell whether the class file parser loads local variable type" \ 1121 "tables") \ 1122 \ 1123 product(bool, AllowUserSignalHandlers, false, \ 1124 "Do not complain if the application installs signal handlers " \ 1125 "(Solaris & Linux only)") \ 1126 \ 1127 product(bool, UseSignalChaining, true, \ 1128 "Use signal-chaining to invoke signal handlers installed " \ 1129 "by the application (Solaris & Linux only)") \ 1130 \ 1131 product(bool, UseAltSigs, false, \ 1132 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1133 "internal signals (Solaris only)") \ 1134 \ 1135 product(bool, AllowJNIEnvProxy, false, \ 1136 "Allow JNIEnv proxies for jdbx") \ 1137 \ 1138 product(bool, JNIDetachReleasesMonitors, true, \ 1139 "JNI DetachCurrentThread releases monitors owned by thread") \ 1140 \ 1141 product(bool, RestoreMXCSROnJNICalls, false, \ 1142 "Restore MXCSR when returning from JNI calls") \ 1143 \ 1144 product(bool, CheckJNICalls, false, \ 1145 "Verify all arguments to JNI calls") \ 1146 \ 1147 product(bool, UseFastJNIAccessors, true, \ 1148 "Use optimized versions of Get<Primitive>Field") \ 1149 \ 1150 product(bool, EagerXrunInit, false, \ 1151 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1152 "but not all -Xrun libraries may support the state of the VM " \ 1153 "at this time") \ 1154 \ 1155 product(bool, PreserveAllAnnotations, false, \ 1156 "Preserve RuntimeInvisibleAnnotations as well " \ 1157 "as RuntimeVisibleAnnotations") \ 1158 \ 1159 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1160 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1161 \ 1162 product(bool, LazyBootClassLoader, true, \ 1163 "Enable/disable lazy opening of boot class path entries") \ 1164 \ 1165 product(bool, UseXMMForArrayCopy, false, \ 1166 "Use SSE2 MOVQ instruction for Arraycopy") \ 1167 \ 1168 product(intx, FieldsAllocationStyle, 1, \ 1169 "0 - type based with oops first, 1 - with oops last, " \ 1170 "2 - oops in super and sub classes are together") \ 1171 \ 1172 product(bool, CompactFields, true, \ 1173 "Allocate nonstatic fields in gaps between previous fields") \ 1174 \ 1175 notproduct(bool, PrintFieldLayout, false, \ 1176 "Print field layout for each class") \ 1177 \ 1178 product(intx, ContendedPaddingWidth, 128, \ 1179 "How many bytes to pad the fields/classes marked @Contended with")\ 1180 \ 1181 product(bool, EnableContended, true, \ 1182 "Enable @Contended annotation support") \ 1183 \ 1184 product(bool, RestrictContended, true, \ 1185 "Restrict @Contended to trusted classes") \ 1186 \ 1187 product(bool, UseBiasedLocking, true, \ 1188 "Enable biased locking in JVM") \ 1189 \ 1190 product(intx, BiasedLockingStartupDelay, 4000, \ 1191 "Number of milliseconds to wait before enabling biased locking") \ 1192 \ 1193 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1194 "Print statistics of biased locking in JVM") \ 1195 \ 1196 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1197 "Threshold of number of revocations per type to try to " \ 1198 "rebias all objects in the heap of that type") \ 1199 \ 1200 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1201 "Threshold of number of revocations per type to permanently " \ 1202 "revoke biases of all objects in the heap of that type") \ 1203 \ 1204 product(intx, BiasedLockingDecayTime, 25000, \ 1205 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1206 "type after previous bulk rebias") \ 1207 \ 1208 /* tracing */ \ 1209 \ 1210 notproduct(bool, TraceRuntimeCalls, false, \ 1211 "Trace run-time calls") \ 1212 \ 1213 develop(bool, TraceJNICalls, false, \ 1214 "Trace JNI calls") \ 1215 \ 1216 notproduct(bool, TraceJVMCalls, false, \ 1217 "Trace JVM calls") \ 1218 \ 1219 product(ccstr, TraceJVMTI, NULL, \ 1220 "Trace flags for JVMTI functions and events") \ 1221 \ 1222 /* This option can change an EMCP method into an obsolete method. */ \ 1223 /* This can affect tests that except specific methods to be EMCP. */ \ 1224 /* This option should be used with caution. */ \ 1225 product(bool, StressLdcRewrite, false, \ 1226 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1227 \ 1228 product(intx, TraceRedefineClasses, 0, \ 1229 "Trace level for JVMTI RedefineClasses") \ 1230 \ 1231 develop(bool, StressMethodComparator, false, \ 1232 "Run the MethodComparator on all loaded methods") \ 1233 \ 1234 /* change to false by default sometime after Mustang */ \ 1235 product(bool, VerifyMergedCPBytecodes, true, \ 1236 "Verify bytecodes after RedefineClasses constant pool merging") \ 1237 \ 1238 develop(bool, TraceJNIHandleAllocation, false, \ 1239 "Trace allocation/deallocation of JNI handle blocks") \ 1240 \ 1241 develop(bool, TraceThreadEvents, false, \ 1242 "Trace all thread events") \ 1243 \ 1244 develop(bool, TraceBytecodes, false, \ 1245 "Trace bytecode execution") \ 1246 \ 1247 develop(bool, TraceClassInitialization, false, \ 1248 "Trace class initialization") \ 1249 \ 1250 develop(bool, TraceExceptions, false, \ 1251 "Trace exceptions") \ 1252 \ 1253 develop(bool, TraceICs, false, \ 1254 "Trace inline cache changes") \ 1255 \ 1256 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1257 "Trace method invocation counter overflow") \ 1258 \ 1259 develop(bool, TraceInlineCacheClearing, false, \ 1260 "Trace clearing of inline caches in nmethods") \ 1261 \ 1262 develop(bool, TraceDependencies, false, \ 1263 "Trace dependencies") \ 1264 \ 1265 develop(bool, VerifyDependencies, trueInDebug, \ 1266 "Exercise and verify the compilation dependency mechanism") \ 1267 \ 1268 develop(bool, TraceNewOopMapGeneration, false, \ 1269 "Trace OopMapGeneration") \ 1270 \ 1271 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1272 "Trace OopMapGeneration: print detailed cell states") \ 1273 \ 1274 develop(bool, TimeOopMap, false, \ 1275 "Time calls to GenerateOopMap::compute_map() in sum") \ 1276 \ 1277 develop(bool, TimeOopMap2, false, \ 1278 "Time calls to GenerateOopMap::compute_map() individually") \ 1279 \ 1280 develop(bool, TraceMonitorMismatch, false, \ 1281 "Trace monitor matching failures during OopMapGeneration") \ 1282 \ 1283 develop(bool, TraceOopMapRewrites, false, \ 1284 "Trace rewriting of method oops during oop map generation") \ 1285 \ 1286 develop(bool, TraceSafepoint, false, \ 1287 "Trace safepoint operations") \ 1288 \ 1289 develop(bool, TraceICBuffer, false, \ 1290 "Trace usage of IC buffer") \ 1291 \ 1292 develop(bool, TraceCompiledIC, false, \ 1293 "Trace changes of compiled IC") \ 1294 \ 1295 notproduct(bool, TraceZapDeadLocals, false, \ 1296 "Trace zapping dead locals") \ 1297 \ 1298 develop(bool, TraceStartupTime, false, \ 1299 "Trace setup time") \ 1300 \ 1301 develop(bool, TraceProtectionDomainVerification, false, \ 1302 "Trace protection domain verification") \ 1303 \ 1304 develop(bool, TraceClearedExceptions, false, \ 1305 "Print when an exception is forcibly cleared") \ 1306 \ 1307 product(bool, TraceClassResolution, false, \ 1308 "Trace all constant pool resolutions (for debugging)") \ 1309 \ 1310 product(bool, TraceBiasedLocking, false, \ 1311 "Trace biased locking in JVM") \ 1312 \ 1313 product(bool, TraceMonitorInflation, false, \ 1314 "Trace monitor inflation in JVM") \ 1315 \ 1316 /* gc */ \ 1317 \ 1318 product(bool, UseSerialGC, false, \ 1319 "Use the Serial garbage collector") \ 1320 \ 1321 product(bool, UseG1GC, false, \ 1322 "Use the Garbage-First garbage collector") \ 1323 \ 1324 product(bool, UseParallelGC, false, \ 1325 "Use the Parallel Scavenge garbage collector") \ 1326 \ 1327 product(bool, UseParallelOldGC, false, \ 1328 "Use the Parallel Old garbage collector") \ 1329 \ 1330 product(uintx, HeapMaximumCompactionInterval, 20, \ 1331 "How often should we maximally compact the heap (not allowing " \ 1332 "any dead space)") \ 1333 \ 1334 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1335 "The collection count for the first maximum compaction") \ 1336 \ 1337 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1338 "Use maximum compaction in the Parallel Old garbage collector " \ 1339 "for a system GC") \ 1340 \ 1341 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1342 "The mean used by the parallel compact dead wood " \ 1343 "limiter (a number between 0-100)") \ 1344 \ 1345 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1346 "The standard deviation used by the parallel compact dead wood " \ 1347 "limiter (a number between 0-100)") \ 1348 \ 1349 product(uintx, ParallelGCThreads, 0, \ 1350 "Number of parallel threads parallel gc will use") \ 1351 \ 1352 product(bool, UseDynamicNumberOfGCThreads, false, \ 1353 "Dynamically choose the number of parallel threads " \ 1354 "parallel gc will use") \ 1355 \ 1356 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1357 "Force dynamic selection of the number of " \ 1358 "parallel threads parallel gc will use to aid debugging") \ 1359 \ 1360 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1361 "Size of heap (bytes) per GC thread used in calculating the " \ 1362 "number of GC threads") \ 1363 \ 1364 product(bool, TraceDynamicGCThreads, false, \ 1365 "Trace the dynamic GC thread usage") \ 1366 \ 1367 develop(bool, ParallelOldGCSplitALot, false, \ 1368 "Provoke splitting (copying data from a young gen space to " \ 1369 "multiple destination spaces)") \ 1370 \ 1371 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1372 "How often to provoke splitting a young gen space") \ 1373 \ 1374 product(uintx, ConcGCThreads, 0, \ 1375 "Number of threads concurrent gc will use") \ 1376 \ 1377 product(uintx, YoungPLABSize, 4096, \ 1378 "Size of young gen promotion LAB's (in HeapWords)") \ 1379 \ 1380 product(uintx, OldPLABSize, 1024, \ 1381 "Size of old gen promotion LAB's (in HeapWords)") \ 1382 \ 1383 product(uintx, GCTaskTimeStampEntries, 200, \ 1384 "Number of time stamp entries per gc worker thread") \ 1385 \ 1386 product(bool, AlwaysTenure, false, \ 1387 "Always tenure objects in eden (ParallelGC only)") \ 1388 \ 1389 product(bool, NeverTenure, false, \ 1390 "Never tenure objects in eden, may tenure on overflow " \ 1391 "(ParallelGC only)") \ 1392 \ 1393 product(bool, ScavengeBeforeFullGC, true, \ 1394 "Scavenge youngest generation before each full GC, " \ 1395 "used with UseParallelGC") \ 1396 \ 1397 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1398 "Allow scavenges to occur when to-space contains objects") \ 1399 \ 1400 product(bool, UseConcMarkSweepGC, false, \ 1401 "Use Concurrent Mark-Sweep GC in the old generation") \ 1402 \ 1403 product(bool, ExplicitGCInvokesConcurrent, false, \ 1404 "A System.gc() request invokes a concurrent collection; " \ 1405 "(effective only when UseConcMarkSweepGC)") \ 1406 \ 1407 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1408 "A System.gc() request invokes a concurrent collection and " \ 1409 "also unloads classes during such a concurrent gc cycle " \ 1410 "(effective only when UseConcMarkSweepGC)") \ 1411 \ 1412 product(bool, GCLockerInvokesConcurrent, false, \ 1413 "The exit of a JNI critical section necessitating a scavenge, " \ 1414 "also kicks off a background concurrent collection") \ 1415 \ 1416 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1417 "How much the GC can expand the eden by while the GC locker " \ 1418 "is active (as a percentage)") \ 1419 \ 1420 diagnostic(intx, GCLockerRetryAllocationCount, 2, \ 1421 "Number of times to retry allocations when " \ 1422 "blocked by the GC locker") \ 1423 \ 1424 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1425 "Use adaptive free lists in the CMS generation") \ 1426 \ 1427 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1428 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1429 \ 1430 develop(bool, RotateCMSCollectionTypes, false, \ 1431 "Rotate the CMS collections among concurrent and STW") \ 1432 \ 1433 product(bool, UseCMSBestFit, true, \ 1434 "Use CMS best fit allocation strategy") \ 1435 \ 1436 product(bool, UseCMSCollectionPassing, true, \ 1437 "Use passing of collection from background to foreground") \ 1438 \ 1439 product(bool, UseParNewGC, false, \ 1440 "Use parallel threads in the new generation") \ 1441 \ 1442 product(bool, ParallelGCVerbose, false, \ 1443 "Verbose output for parallel gc") \ 1444 \ 1445 product(uintx, ParallelGCBufferWastePct, 10, \ 1446 "Wasted fraction of parallel allocation buffer") \ 1447 \ 1448 diagnostic(bool, ParallelGCRetainPLAB, false, \ 1449 "Retain parallel allocation buffers across scavenges; " \ 1450 "it is disabled because this currently conflicts with " \ 1451 "parallel card scanning under certain conditions.") \ 1452 \ 1453 product(uintx, TargetPLABWastePct, 10, \ 1454 "Target wasted space in last buffer as percent of overall " \ 1455 "allocation") \ 1456 \ 1457 product(uintx, PLABWeight, 75, \ 1458 "Percentage (0-100) used to weigh the current sample when " \ 1459 "computing exponentially decaying average for ResizePLAB") \ 1460 \ 1461 product(bool, ResizePLAB, true, \ 1462 "Dynamically resize (survivor space) promotion LAB's") \ 1463 \ 1464 product(bool, PrintPLAB, false, \ 1465 "Print (survivor space) promotion LAB's sizing decisions") \ 1466 \ 1467 product(intx, ParGCArrayScanChunk, 50, \ 1468 "Scan a subset of object array and push remainder, if array is " \ 1469 "bigger than this") \ 1470 \ 1471 product(bool, ParGCUseLocalOverflow, false, \ 1472 "Instead of a global overflow list, use local overflow stacks") \ 1473 \ 1474 product(bool, ParGCTrimOverflow, true, \ 1475 "Eagerly trim the local overflow lists " \ 1476 "(when ParGCUseLocalOverflow)") \ 1477 \ 1478 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1479 "Simulate work queue overflow in ParNew") \ 1480 \ 1481 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1482 "An `interval' counter that determines how frequently " \ 1483 "we simulate overflow; a smaller number increases frequency") \ 1484 \ 1485 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1486 "The desired number of objects to claim from the overflow list") \ 1487 \ 1488 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1489 "The number of strides per worker thread that we divide up the " \ 1490 "card table scanning work into") \ 1491 \ 1492 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1493 "The number of cards in each chunk of the parallel chunks used " \ 1494 "during card table scanning") \ 1495 \ 1496 product(uintx, CMSParPromoteBlocksToClaim, 16, \ 1497 "Number of blocks to attempt to claim when refilling CMS LAB's " \ 1498 "for parallel GC") \ 1499 \ 1500 product(uintx, OldPLABWeight, 50, \ 1501 "Percentage (0-100) used to weight the current sample when " \ 1502 "computing exponentially decaying average for resizing " \ 1503 "CMSParPromoteBlocksToClaim") \ 1504 \ 1505 product(bool, ResizeOldPLAB, true, \ 1506 "Dynamically resize (old gen) promotion LAB's") \ 1507 \ 1508 product(bool, PrintOldPLAB, false, \ 1509 "Print (old gen) promotion LAB's sizing decisions") \ 1510 \ 1511 product(uintx, CMSOldPLABMin, 16, \ 1512 "Minimum size of CMS gen promotion LAB caches per worker " \ 1513 "per block size") \ 1514 \ 1515 product(uintx, CMSOldPLABMax, 1024, \ 1516 "Maximum size of CMS gen promotion LAB caches per worker " \ 1517 "per block size") \ 1518 \ 1519 product(uintx, CMSOldPLABNumRefills, 4, \ 1520 "Nominal number of refills of CMS gen promotion LAB cache " \ 1521 "per worker per block size") \ 1522 \ 1523 product(bool, CMSOldPLABResizeQuicker, false, \ 1524 "React on-the-fly during a scavenge to a sudden " \ 1525 "change in block demand rate") \ 1526 \ 1527 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1528 "The tolerance of the phase-change detector for on-the-fly " \ 1529 "PLAB resizing during a scavenge") \ 1530 \ 1531 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1532 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1533 "during a scavenge") \ 1534 \ 1535 product(bool, AlwaysPreTouch, false, \ 1536 "Force all freshly committed pages to be pre-touched") \ 1537 \ 1538 product_pd(uintx, CMSYoungGenPerWorker, \ 1539 "The maximum size of young gen chosen by default per GC worker " \ 1540 "thread available") \ 1541 \ 1542 product(bool, CMSIncrementalMode, false, \ 1543 "Whether CMS GC should operate in \"incremental\" mode") \ 1544 \ 1545 product(uintx, CMSIncrementalDutyCycle, 10, \ 1546 "Percentage (0-100) of CMS incremental mode duty cycle. If " \ 1547 "CMSIncrementalPacing is enabled, then this is just the initial " \ 1548 "value.") \ 1549 \ 1550 product(bool, CMSIncrementalPacing, true, \ 1551 "Whether the CMS incremental mode duty cycle should be " \ 1552 "automatically adjusted") \ 1553 \ 1554 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1555 "Minimum percentage (0-100) of the CMS incremental duty cycle " \ 1556 "used when CMSIncrementalPacing is enabled") \ 1557 \ 1558 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1559 "Percentage (0-100) used to add conservatism when computing the " \ 1560 "duty cycle") \ 1561 \ 1562 product(uintx, CMSIncrementalOffset, 0, \ 1563 "Percentage (0-100) by which the CMS incremental mode duty cycle "\ 1564 "is shifted to the right within the period between young GCs") \ 1565 \ 1566 product(uintx, CMSExpAvgFactor, 50, \ 1567 "Percentage (0-100) used to weigh the current sample when " \ 1568 "computing exponential averages for CMS statistics") \ 1569 \ 1570 product(uintx, CMS_FLSWeight, 75, \ 1571 "Percentage (0-100) used to weigh the current sample when " \ 1572 "computing exponentially decaying averages for CMS FLS " \ 1573 "statistics") \ 1574 \ 1575 product(uintx, CMS_FLSPadding, 1, \ 1576 "The multiple of deviation from mean to use for buffering " \ 1577 "against volatility in free list demand") \ 1578 \ 1579 product(uintx, FLSCoalescePolicy, 2, \ 1580 "CMS: aggressiveness level for coalescing, increasing " \ 1581 "from 0 to 4") \ 1582 \ 1583 product(bool, FLSAlwaysCoalesceLarge, false, \ 1584 "CMS: larger free blocks are always available for coalescing") \ 1585 \ 1586 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1587 "CMS: the smaller the percentage the greater the coalescing " \ 1588 "force") \ 1589 \ 1590 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1591 "CMS: the factor by which to inflate estimated demand of small " \ 1592 "block sizes to prevent coalescing with an adjoining block") \ 1593 \ 1594 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1595 "CMS: the factor by which to inflate estimated demand of large " \ 1596 "block sizes to prevent coalescing with an adjoining block") \ 1597 \ 1598 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1599 "CMS: the factor by which to inflate estimated demand of small " \ 1600 "block sizes to prevent splitting to supply demand for smaller " \ 1601 "blocks") \ 1602 \ 1603 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1604 "CMS: the factor by which to inflate estimated demand of large " \ 1605 "block sizes to prevent splitting to supply demand for smaller " \ 1606 "blocks") \ 1607 \ 1608 product(bool, CMSExtrapolateSweep, false, \ 1609 "CMS: cushion for block demand during sweep") \ 1610 \ 1611 product(uintx, CMS_SweepWeight, 75, \ 1612 "Percentage (0-100) used to weight the current sample when " \ 1613 "computing exponentially decaying average for inter-sweep " \ 1614 "duration") \ 1615 \ 1616 product(uintx, CMS_SweepPadding, 1, \ 1617 "The multiple of deviation from mean to use for buffering " \ 1618 "against volatility in inter-sweep duration") \ 1619 \ 1620 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1621 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1622 "duration exceeds this threshold in milliseconds") \ 1623 \ 1624 develop(bool, CMSTraceIncrementalMode, false, \ 1625 "Trace CMS incremental mode") \ 1626 \ 1627 develop(bool, CMSTraceIncrementalPacing, false, \ 1628 "Trace CMS incremental mode pacing computation") \ 1629 \ 1630 develop(bool, CMSTraceThreadState, false, \ 1631 "Trace the CMS thread state (enable the trace_state() method)") \ 1632 \ 1633 product(bool, CMSClassUnloadingEnabled, true, \ 1634 "Whether class unloading enabled when using CMS GC") \ 1635 \ 1636 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1637 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1638 "count for which classes may not be unloaded") \ 1639 \ 1640 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1641 "Compact when asked to collect CMS gen with " \ 1642 "clear_all_soft_refs()") \ 1643 \ 1644 product(bool, UseCMSCompactAtFullCollection, true, \ 1645 "Use Mark-Sweep-Compact algorithm at full collections") \ 1646 \ 1647 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1648 "Number of CMS full collection done before compaction if > 0") \ 1649 \ 1650 develop(intx, CMSDictionaryChoice, 0, \ 1651 "Use BinaryTreeDictionary as default in the CMS generation") \ 1652 \ 1653 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1654 "Replenish an indexed free list with this number of chunks") \ 1655 \ 1656 product(bool, CMSReplenishIntermediate, true, \ 1657 "Replenish all intermediate free-list caches") \ 1658 \ 1659 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1660 "When satisfying batched demand, split blocks from the " \ 1661 "IndexedFreeList whose size is a multiple of requested size") \ 1662 \ 1663 product(bool, CMSLoopWarn, false, \ 1664 "Warn in case of excessive CMS looping") \ 1665 \ 1666 develop(bool, CMSOverflowEarlyRestoration, false, \ 1667 "Restore preserved marks early") \ 1668 \ 1669 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1670 "Size of marking stack") \ 1671 \ 1672 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1673 "Maximum size of marking stack") \ 1674 \ 1675 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1676 "Simulate frequent marking stack / work queue overflow") \ 1677 \ 1678 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1679 "An \"interval\" counter that determines how frequently " \ 1680 "to simulate overflow; a smaller number increases frequency") \ 1681 \ 1682 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1683 "(Temporary, subject to experimentation) " \ 1684 "Maximum number of abortable preclean iterations, if > 0") \ 1685 \ 1686 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1687 "(Temporary, subject to experimentation) " \ 1688 "Maximum time in abortable preclean (in milliseconds)") \ 1689 \ 1690 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1691 "(Temporary, subject to experimentation) " \ 1692 "Nominal minimum work per abortable preclean iteration") \ 1693 \ 1694 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1695 "(Temporary, subject to experimentation) " \ 1696 "Time that we sleep between iterations when not given " \ 1697 "enough work per iteration") \ 1698 \ 1699 product(uintx, CMSRescanMultiple, 32, \ 1700 "Size (in cards) of CMS parallel rescan task") \ 1701 \ 1702 product(uintx, CMSConcMarkMultiple, 32, \ 1703 "Size (in cards) of CMS concurrent MT marking task") \ 1704 \ 1705 product(bool, CMSAbortSemantics, false, \ 1706 "Whether abort-on-overflow semantics is implemented") \ 1707 \ 1708 product(bool, CMSParallelInitialMarkEnabled, true, \ 1709 "Use the parallel initial mark.") \ 1710 \ 1711 product(bool, CMSParallelRemarkEnabled, true, \ 1712 "Whether parallel remark enabled (only if ParNewGC)") \ 1713 \ 1714 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1715 "Whether parallel remark of survivor space " \ 1716 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1717 \ 1718 product(bool, CMSPLABRecordAlways, true, \ 1719 "Always record survivor space PLAB boundaries (effective only " \ 1720 "if CMSParallelSurvivorRemarkEnabled)") \ 1721 \ 1722 product(bool, CMSEdenChunksRecordAlways, true, \ 1723 "Always record eden chunks used for the parallel initial mark " \ 1724 "or remark of eden") \ 1725 \ 1726 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1727 "Print the eden and the survivor chunks used for the parallel " \ 1728 "initial mark or remark of the eden/survivor spaces") \ 1729 \ 1730 product(bool, CMSConcurrentMTEnabled, true, \ 1731 "Whether multi-threaded concurrent work enabled " \ 1732 "(effective only if ParNewGC)") \ 1733 \ 1734 product(bool, CMSPrecleaningEnabled, true, \ 1735 "Whether concurrent precleaning enabled") \ 1736 \ 1737 product(uintx, CMSPrecleanIter, 3, \ 1738 "Maximum number of precleaning iteration passes") \ 1739 \ 1740 product(uintx, CMSPrecleanNumerator, 2, \ 1741 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1742 "ratio") \ 1743 \ 1744 product(uintx, CMSPrecleanDenominator, 3, \ 1745 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1746 "ratio") \ 1747 \ 1748 product(bool, CMSPrecleanRefLists1, true, \ 1749 "Preclean ref lists during (initial) preclean phase") \ 1750 \ 1751 product(bool, CMSPrecleanRefLists2, false, \ 1752 "Preclean ref lists during abortable preclean phase") \ 1753 \ 1754 product(bool, CMSPrecleanSurvivors1, false, \ 1755 "Preclean survivors during (initial) preclean phase") \ 1756 \ 1757 product(bool, CMSPrecleanSurvivors2, true, \ 1758 "Preclean survivors during abortable preclean phase") \ 1759 \ 1760 product(uintx, CMSPrecleanThreshold, 1000, \ 1761 "Do not iterate again if number of dirty cards is less than this")\ 1762 \ 1763 product(bool, CMSCleanOnEnter, true, \ 1764 "Clean-on-enter optimization for reducing number of dirty cards") \ 1765 \ 1766 product(uintx, CMSRemarkVerifyVariant, 1, \ 1767 "Choose variant (1,2) of verification following remark") \ 1768 \ 1769 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1770 "If Eden size is below this, do not try to schedule remark") \ 1771 \ 1772 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1773 "The Eden occupancy percentage (0-100) at which " \ 1774 "to try and schedule remark pause") \ 1775 \ 1776 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1777 "Start sampling eden top at least before young gen " \ 1778 "occupancy reaches 1/<ratio> of the size at which " \ 1779 "we plan to schedule remark") \ 1780 \ 1781 product(uintx, CMSSamplingGrain, 16*K, \ 1782 "The minimum distance between eden samples for CMS (see above)") \ 1783 \ 1784 product(bool, CMSScavengeBeforeRemark, false, \ 1785 "Attempt scavenge before the CMS remark step") \ 1786 \ 1787 develop(bool, CMSTraceSweeper, false, \ 1788 "Trace some actions of the CMS sweeper") \ 1789 \ 1790 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1791 "Don't drain below this size per parallel worker/thief") \ 1792 \ 1793 manageable(intx, CMSWaitDuration, 2000, \ 1794 "Time in milliseconds that CMS thread waits for young GC") \ 1795 \ 1796 develop(uintx, CMSCheckInterval, 1000, \ 1797 "Interval in milliseconds that CMS thread checks if it " \ 1798 "should start a collection cycle") \ 1799 \ 1800 product(bool, CMSYield, true, \ 1801 "Yield between steps of CMS") \ 1802 \ 1803 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1804 "Bitmap operations should process at most this many bits " \ 1805 "between yields") \ 1806 \ 1807 product(bool, CMSDumpAtPromotionFailure, false, \ 1808 "Dump useful information about the state of the CMS old " \ 1809 "generation upon a promotion failure") \ 1810 \ 1811 product(bool, CMSPrintChunksInDump, false, \ 1812 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1813 "more detailed information about the free chunks") \ 1814 \ 1815 product(bool, CMSPrintObjectsInDump, false, \ 1816 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1817 "more detailed information about the allocated objects") \ 1818 \ 1819 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1820 "Verify that all references across the FLS boundary " \ 1821 "are to valid objects") \ 1822 \ 1823 diagnostic(bool, FLSVerifyLists, false, \ 1824 "Do lots of (expensive) FreeListSpace verification") \ 1825 \ 1826 diagnostic(bool, FLSVerifyIndexTable, false, \ 1827 "Do lots of (expensive) FLS index table verification") \ 1828 \ 1829 develop(bool, FLSVerifyDictionary, false, \ 1830 "Do lots of (expensive) FLS dictionary verification") \ 1831 \ 1832 develop(bool, VerifyBlockOffsetArray, false, \ 1833 "Do (expensive) block offset array verification") \ 1834 \ 1835 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1836 "Maintain _unallocated_block in BlockOffsetArray " \ 1837 "(currently applicable only to CMS collector)") \ 1838 \ 1839 develop(bool, TraceCMSState, false, \ 1840 "Trace the state of the CMS collection") \ 1841 \ 1842 product(intx, RefDiscoveryPolicy, 0, \ 1843 "Select type of reference discovery policy: " \ 1844 "reference-based(0) or referent-based(1)") \ 1845 \ 1846 product(bool, ParallelRefProcEnabled, false, \ 1847 "Enable parallel reference processing whenever possible") \ 1848 \ 1849 product(bool, ParallelRefProcBalancingEnabled, true, \ 1850 "Enable balancing of reference processing queues") \ 1851 \ 1852 product(uintx, CMSTriggerRatio, 80, \ 1853 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1854 "allocated before a CMS collection cycle commences") \ 1855 \ 1856 product(uintx, CMSBootstrapOccupancy, 50, \ 1857 "Percentage CMS generation occupancy at which to " \ 1858 "initiate CMS collection for bootstrapping collection stats") \ 1859 \ 1860 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1861 "Percentage CMS generation occupancy to start a CMS collection " \ 1862 "cycle. A negative value means that CMSTriggerRatio is used") \ 1863 \ 1864 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1865 "Percentage of the (entire) heap occupancy to start a " \ 1866 "concurrent GC cycle. It is used by GCs that trigger a " \ 1867 "concurrent GC cycle based on the occupancy of the entire heap, " \ 1868 "not just one of the generations (e.g., G1). A value of 0 " \ 1869 "denotes 'do constant GC cycles'.") \ 1870 \ 1871 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1872 "Only use occupancy as a criterion for starting a CMS collection")\ 1873 \ 1874 product(uintx, CMSIsTooFullPercentage, 98, \ 1875 "An absolute ceiling above which CMS will always consider the " \ 1876 "unloading of classes when class unloading is enabled") \ 1877 \ 1878 develop(bool, CMSTestInFreeList, false, \ 1879 "Check if the coalesced range is already in the " \ 1880 "free lists as claimed") \ 1881 \ 1882 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1883 "Check that all the garbage collected was returned to the " \ 1884 "free lists") \ 1885 \ 1886 notproduct(bool, ScavengeALot, false, \ 1887 "Force scavenge at every Nth exit from the runtime system " \ 1888 "(N=ScavengeALotInterval)") \ 1889 \ 1890 develop(bool, FullGCALot, false, \ 1891 "Force full gc at every Nth exit from the runtime system " \ 1892 "(N=FullGCALotInterval)") \ 1893 \ 1894 notproduct(bool, GCALotAtAllSafepoints, false, \ 1895 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1896 \ 1897 product(bool, PrintPromotionFailure, false, \ 1898 "Print additional diagnostic information following " \ 1899 "promotion failure") \ 1900 \ 1901 notproduct(bool, PromotionFailureALot, false, \ 1902 "Use promotion failure handling on every youngest generation " \ 1903 "collection") \ 1904 \ 1905 develop(uintx, PromotionFailureALotCount, 1000, \ 1906 "Number of promotion failures occurring at ParGCAllocBuffer " \ 1907 "refill attempts (ParNew) or promotion attempts " \ 1908 "(other young collectors)") \ 1909 \ 1910 develop(uintx, PromotionFailureALotInterval, 5, \ 1911 "Total collections between promotion failures alot") \ 1912 \ 1913 experimental(uintx, WorkStealingSleepMillis, 1, \ 1914 "Sleep time when sleep is used for yields") \ 1915 \ 1916 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 1917 "Number of yields before a sleep is done during workstealing") \ 1918 \ 1919 experimental(uintx, WorkStealingHardSpins, 4096, \ 1920 "Number of iterations in a spin loop between checks on " \ 1921 "time out of hard spin") \ 1922 \ 1923 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 1924 "Ratio of hard spins to calls to yield") \ 1925 \ 1926 develop(uintx, ObjArrayMarkingStride, 512, \ 1927 "Number of object array elements to push onto the marking stack " \ 1928 "before pushing a continuation entry") \ 1929 \ 1930 develop(bool, MetadataAllocationFailALot, false, \ 1931 "Fail metadata allocations at intervals controlled by " \ 1932 "MetadataAllocationFailALotInterval") \ 1933 \ 1934 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 1935 "Metadata allocation failure a lot interval") \ 1936 \ 1937 develop(bool, MetaDataDeallocateALot, false, \ 1938 "Deallocation bunches of metadata at intervals controlled by " \ 1939 "MetaDataAllocateALotInterval") \ 1940 \ 1941 develop(uintx, MetaDataDeallocateALotInterval, 100, \ 1942 "Metadata deallocation alot interval") \ 1943 \ 1944 develop(bool, TraceMetadataChunkAllocation, false, \ 1945 "Trace chunk metadata allocations") \ 1946 \ 1947 product(bool, TraceMetadataHumongousAllocation, false, \ 1948 "Trace humongous metadata allocations") \ 1949 \ 1950 develop(bool, TraceMetavirtualspaceAllocation, false, \ 1951 "Trace virtual space metadata allocations") \ 1952 \ 1953 notproduct(bool, ExecuteInternalVMTests, false, \ 1954 "Enable execution of internal VM tests") \ 1955 \ 1956 notproduct(bool, VerboseInternalVMTests, false, \ 1957 "Turn on logging for internal VM tests.") \ 1958 \ 1959 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1960 \ 1961 product_pd(bool, ResizeTLAB, \ 1962 "Dynamically resize TLAB size for threads") \ 1963 \ 1964 product(bool, ZeroTLAB, false, \ 1965 "Zero out the newly created TLAB") \ 1966 \ 1967 product(bool, FastTLABRefill, true, \ 1968 "Use fast TLAB refill code") \ 1969 \ 1970 product(bool, PrintTLAB, false, \ 1971 "Print various TLAB related information") \ 1972 \ 1973 product(bool, TLABStats, true, \ 1974 "Provide more detailed and expensive TLAB statistics " \ 1975 "(with PrintTLAB)") \ 1976 \ 1977 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 1978 "Enable LowMemoryProtection")) \ 1979 \ 1980 product_pd(bool, NeverActAsServerClassMachine, \ 1981 "Never act like a server-class machine") \ 1982 \ 1983 product(bool, AlwaysActAsServerClassMachine, false, \ 1984 "Always act like a server-class machine") \ 1985 \ 1986 product_pd(uint64_t, MaxRAM, \ 1987 "Real memory size (in bytes) used to set maximum heap size") \ 1988 \ 1989 product(uintx, ErgoHeapSizeLimit, 0, \ 1990 "Maximum ergonomically set heap size (in bytes); zero means use " \ 1991 "MaxRAM / MaxRAMFraction") \ 1992 \ 1993 product(uintx, MaxRAMFraction, 4, \ 1994 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1995 "size") \ 1996 \ 1997 product(uintx, DefaultMaxRAMFraction, 4, \ 1998 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1999 "size; deprecated: to be renamed to MaxRAMFraction") \ 2000 \ 2001 product(uintx, MinRAMFraction, 2, \ 2002 "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 2003 "size on systems with small physical memory size") \ 2004 \ 2005 product(uintx, InitialRAMFraction, 64, \ 2006 "Fraction (1/n) of real memory used for initial heap size") \ 2007 \ 2008 develop(uintx, MaxVirtMemFraction, 2, \ 2009 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2010 "determining maximum heap size") \ 2011 \ 2012 product(bool, UseAutoGCSelectPolicy, false, \ 2013 "Use automatic collection selection policy") \ 2014 \ 2015 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2016 "Automatic GC selection pause threshold in milliseconds") \ 2017 \ 2018 product(bool, UseAdaptiveSizePolicy, true, \ 2019 "Use adaptive generation sizing policies") \ 2020 \ 2021 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2022 "Use adaptive survivor sizing policies") \ 2023 \ 2024 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2025 "Use adaptive young-old sizing policies at minor collections") \ 2026 \ 2027 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2028 "Use adaptive young-old sizing policies at major collections") \ 2029 \ 2030 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2031 "Include statistics from System.gc() for adaptive size policy") \ 2032 \ 2033 product(bool, UseAdaptiveGCBoundary, false, \ 2034 "Allow young-old boundary to move") \ 2035 \ 2036 develop(bool, TraceAdaptiveGCBoundary, false, \ 2037 "Trace young-old boundary moves") \ 2038 \ 2039 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2040 "Resize the virtual spaces of the young or old generations") \ 2041 \ 2042 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2043 "Policy for changing generation size for throughput goals") \ 2044 \ 2045 product(uintx, AdaptiveSizePausePolicy, 0, \ 2046 "Policy for changing generation size for pause goals") \ 2047 \ 2048 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 2049 "Adjust tenured generation to achieve a minor pause goal") \ 2050 \ 2051 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2052 "Adjust young generation to achieve a major pause goal") \ 2053 \ 2054 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2055 "Number of steps where heuristics is used before data is used") \ 2056 \ 2057 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2058 "Number of collections before the adaptive sizing is started") \ 2059 \ 2060 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2061 "Collection interval for printing information; zero means never") \ 2062 \ 2063 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2064 "Use adaptive minimum footprint as a goal") \ 2065 \ 2066 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2067 "Weight given to exponential resizing, between 0 and 100") \ 2068 \ 2069 product(uintx, AdaptiveTimeWeight, 25, \ 2070 "Weight given to time in adaptive policy, between 0 and 100") \ 2071 \ 2072 product(uintx, PausePadding, 1, \ 2073 "How much buffer to keep for pause time") \ 2074 \ 2075 product(uintx, PromotedPadding, 3, \ 2076 "How much buffer to keep for promotion failure") \ 2077 \ 2078 product(uintx, SurvivorPadding, 3, \ 2079 "How much buffer to keep for survivor overflow") \ 2080 \ 2081 product(uintx, ThresholdTolerance, 10, \ 2082 "Allowed collection cost difference between generations") \ 2083 \ 2084 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2085 "If collection costs are within margin, reduce both by full " \ 2086 "delta") \ 2087 \ 2088 product(uintx, YoungGenerationSizeIncrement, 20, \ 2089 "Adaptive size percentage change in young generation") \ 2090 \ 2091 product(uintx, YoungGenerationSizeSupplement, 80, \ 2092 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2093 \ 2094 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2095 "Decay factor to YoungedGenerationSizeSupplement") \ 2096 \ 2097 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2098 "Adaptive size percentage change in tenured generation") \ 2099 \ 2100 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2101 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2102 \ 2103 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2104 "Decay factor to TenuredGenerationSizeIncrement") \ 2105 \ 2106 product(uintx, MaxGCPauseMillis, max_uintx, \ 2107 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2108 "or (G1 Only) the maximum GC time per MMU time slice") \ 2109 \ 2110 product(uintx, GCPauseIntervalMillis, 0, \ 2111 "Time slice for MMU specification") \ 2112 \ 2113 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2114 "Adaptive size policy maximum GC minor pause time goal " \ 2115 "in millisecond") \ 2116 \ 2117 product(uintx, GCTimeRatio, 99, \ 2118 "Adaptive size policy application time to GC time ratio") \ 2119 \ 2120 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2121 "Adaptive size scale down factor for shrinking") \ 2122 \ 2123 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2124 "Adaptive size decays the major cost for long major intervals") \ 2125 \ 2126 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2127 "Time scale over which major costs decay") \ 2128 \ 2129 product(uintx, MinSurvivorRatio, 3, \ 2130 "Minimum ratio of young generation/survivor space size") \ 2131 \ 2132 product(uintx, InitialSurvivorRatio, 8, \ 2133 "Initial ratio of eden/survivor space size") \ 2134 \ 2135 product(uintx, BaseFootPrintEstimate, 256*M, \ 2136 "Estimate of footprint other than Java Heap") \ 2137 \ 2138 product(bool, UseGCOverheadLimit, true, \ 2139 "Use policy to limit of proportion of time spent in GC " \ 2140 "before an OutOfMemory error is thrown") \ 2141 \ 2142 product(uintx, GCTimeLimit, 98, \ 2143 "Limit of the proportion of time spent in GC before " \ 2144 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2145 \ 2146 product(uintx, GCHeapFreeLimit, 2, \ 2147 "Minimum percentage of free space after a full GC before an " \ 2148 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2149 \ 2150 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2151 "Number of consecutive collections before gc time limit fires") \ 2152 \ 2153 product(bool, PrintAdaptiveSizePolicy, false, \ 2154 "Print information about AdaptiveSizePolicy") \ 2155 \ 2156 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2157 "How far ahead to prefetch destination area (<= 0 means off)") \ 2158 \ 2159 product(intx, PrefetchScanIntervalInBytes, -1, \ 2160 "How far ahead to prefetch scan area (<= 0 means off)") \ 2161 \ 2162 product(intx, PrefetchFieldsAhead, -1, \ 2163 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2164 \ 2165 diagnostic(bool, VerifySilently, false, \ 2166 "Do not print the verification progress") \ 2167 \ 2168 diagnostic(bool, VerifyDuringStartup, false, \ 2169 "Verify memory system before executing any Java code " \ 2170 "during VM initialization") \ 2171 \ 2172 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2173 "Verify system before exiting") \ 2174 \ 2175 diagnostic(bool, VerifyBeforeGC, false, \ 2176 "Verify memory system before GC") \ 2177 \ 2178 diagnostic(bool, VerifyAfterGC, false, \ 2179 "Verify memory system after GC") \ 2180 \ 2181 diagnostic(bool, VerifyDuringGC, false, \ 2182 "Verify memory system during GC (between phases)") \ 2183 \ 2184 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2185 "Enable parallel memory system verification") \ 2186 \ 2187 diagnostic(bool, DeferInitialCardMark, false, \ 2188 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2189 "may arise from new_pre_store_barrier") \ 2190 \ 2191 diagnostic(bool, VerifyRememberedSets, false, \ 2192 "Verify GC remembered sets") \ 2193 \ 2194 diagnostic(bool, VerifyObjectStartArray, true, \ 2195 "Verify GC object start array if verify before/after") \ 2196 \ 2197 product(bool, DisableExplicitGC, false, \ 2198 "Ignore calls to System.gc()") \ 2199 \ 2200 notproduct(bool, CheckMemoryInitialization, false, \ 2201 "Check memory initialization") \ 2202 \ 2203 product(bool, CollectGen0First, false, \ 2204 "Collect youngest generation before each full GC") \ 2205 \ 2206 diagnostic(bool, BindCMSThreadToCPU, false, \ 2207 "Bind CMS Thread to CPU if possible") \ 2208 \ 2209 diagnostic(uintx, CPUForCMSThread, 0, \ 2210 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2211 \ 2212 product(bool, BindGCTaskThreadsToCPUs, false, \ 2213 "Bind GCTaskThreads to CPUs if possible") \ 2214 \ 2215 product(bool, UseGCTaskAffinity, false, \ 2216 "Use worker affinity when asking for GCTasks") \ 2217 \ 2218 product(uintx, ProcessDistributionStride, 4, \ 2219 "Stride through processors when distributing processes") \ 2220 \ 2221 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2222 "Number of times the coordinator GC thread will sleep while " \ 2223 "yielding before giving up and resuming GC") \ 2224 \ 2225 product(uintx, CMSYieldSleepCount, 0, \ 2226 "Number of times a GC thread (minus the coordinator) " \ 2227 "will sleep while yielding before giving up and resuming GC") \ 2228 \ 2229 /* gc tracing */ \ 2230 manageable(bool, PrintGC, false, \ 2231 "Print message at garbage collection") \ 2232 \ 2233 manageable(bool, PrintGCDetails, false, \ 2234 "Print more details at garbage collection") \ 2235 \ 2236 manageable(bool, PrintGCDateStamps, false, \ 2237 "Print date stamps at garbage collection") \ 2238 \ 2239 manageable(bool, PrintGCTimeStamps, false, \ 2240 "Print timestamps at garbage collection") \ 2241 \ 2242 product(bool, PrintGCTaskTimeStamps, false, \ 2243 "Print timestamps for individual gc worker thread tasks") \ 2244 \ 2245 develop(intx, ConcGCYieldTimeout, 0, \ 2246 "If non-zero, assert that GC threads yield within this " \ 2247 "number of milliseconds") \ 2248 \ 2249 notproduct(bool, TraceMarkSweep, false, \ 2250 "Trace mark sweep") \ 2251 \ 2252 product(bool, PrintReferenceGC, false, \ 2253 "Print times spent handling reference objects during GC " \ 2254 "(enabled only when PrintGCDetails)") \ 2255 \ 2256 develop(bool, TraceReferenceGC, false, \ 2257 "Trace handling of soft/weak/final/phantom references") \ 2258 \ 2259 develop(bool, TraceFinalizerRegistration, false, \ 2260 "Trace registration of final references") \ 2261 \ 2262 notproduct(bool, TraceScavenge, false, \ 2263 "Trace scavenge") \ 2264 \ 2265 product_rw(bool, TraceClassLoading, false, \ 2266 "Trace all classes loaded") \ 2267 \ 2268 product(bool, TraceClassLoadingPreorder, false, \ 2269 "Trace all classes loaded in order referenced (not loaded)") \ 2270 \ 2271 product_rw(bool, TraceClassUnloading, false, \ 2272 "Trace unloading of classes") \ 2273 \ 2274 product_rw(bool, TraceLoaderConstraints, false, \ 2275 "Trace loader constraints") \ 2276 \ 2277 develop(bool, TraceClassLoaderData, false, \ 2278 "Trace class loader loader_data lifetime") \ 2279 \ 2280 product(uintx, InitialBootClassLoaderMetaspaceSize, \ 2281 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2282 "Initial size of the boot class loader data metaspace") \ 2283 \ 2284 product(bool, TraceGen0Time, false, \ 2285 "Trace accumulated time for Gen 0 collection") \ 2286 \ 2287 product(bool, TraceGen1Time, false, \ 2288 "Trace accumulated time for Gen 1 collection") \ 2289 \ 2290 product(bool, PrintTenuringDistribution, false, \ 2291 "Print tenuring age information") \ 2292 \ 2293 product_rw(bool, PrintHeapAtGC, false, \ 2294 "Print heap layout before and after each GC") \ 2295 \ 2296 product_rw(bool, PrintHeapAtGCExtended, false, \ 2297 "Print extended information about the layout of the heap " \ 2298 "when -XX:+PrintHeapAtGC is set") \ 2299 \ 2300 product(bool, PrintHeapAtSIGBREAK, true, \ 2301 "Print heap layout in response to SIGBREAK") \ 2302 \ 2303 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2304 "Print a class histogram before any major stop-world GC") \ 2305 \ 2306 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2307 "Print a class histogram after any major stop-world GC") \ 2308 \ 2309 manageable(bool, PrintClassHistogram, false, \ 2310 "Print a histogram of class instances") \ 2311 \ 2312 develop(bool, TraceWorkGang, false, \ 2313 "Trace activities of work gangs") \ 2314 \ 2315 product(bool, TraceParallelOldGCTasks, false, \ 2316 "Trace multithreaded GC activity") \ 2317 \ 2318 develop(bool, TraceBlockOffsetTable, false, \ 2319 "Print BlockOffsetTable maps") \ 2320 \ 2321 develop(bool, TraceCardTableModRefBS, false, \ 2322 "Print CardTableModRefBS maps") \ 2323 \ 2324 develop(bool, TraceGCTaskManager, false, \ 2325 "Trace actions of the GC task manager") \ 2326 \ 2327 develop(bool, TraceGCTaskQueue, false, \ 2328 "Trace actions of the GC task queues") \ 2329 \ 2330 diagnostic(bool, TraceGCTaskThread, false, \ 2331 "Trace actions of the GC task threads") \ 2332 \ 2333 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2334 "Print the time taken by each phase in ParallelOldGC " \ 2335 "(PrintGCDetails must also be enabled)") \ 2336 \ 2337 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2338 "Trace marking phase in ParallelOldGC") \ 2339 \ 2340 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2341 "Trace summary phase in ParallelOldGC") \ 2342 \ 2343 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2344 "Trace compaction phase in ParallelOldGC") \ 2345 \ 2346 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2347 "Trace dense prefix computation for ParallelOldGC") \ 2348 \ 2349 develop(bool, IgnoreLibthreadGPFault, false, \ 2350 "Suppress workaround for libthread GP fault") \ 2351 \ 2352 product(bool, PrintJNIGCStalls, false, \ 2353 "Print diagnostic message when GC is stalled " \ 2354 "by JNI critical section") \ 2355 \ 2356 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2357 "The percentage of the used heap that the instances of a class " \ 2358 "must occupy for the class to generate a trace event") \ 2359 \ 2360 /* GC log rotation setting */ \ 2361 \ 2362 product(bool, UseGCLogFileRotation, false, \ 2363 "Rotate gclog files (for long running applications). It requires "\ 2364 "-Xloggc:<filename>") \ 2365 \ 2366 product(uintx, NumberOfGCLogFiles, 0, \ 2367 "Number of gclog files in rotation " \ 2368 "(default: 0, no rotation)") \ 2369 \ 2370 product(uintx, GCLogFileSize, 0, \ 2371 "GC log file size (default: 0 bytes, no rotation). " \ 2372 "It requires UseGCLogFileRotation") \ 2373 \ 2374 /* JVMTI heap profiling */ \ 2375 \ 2376 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2377 "Trace JVMTI object tagging calls") \ 2378 \ 2379 diagnostic(bool, VerifyBeforeIteration, false, \ 2380 "Verify memory system before JVMTI iteration") \ 2381 \ 2382 /* compiler interface */ \ 2383 \ 2384 develop(bool, CIPrintCompilerName, false, \ 2385 "when CIPrint is active, print the name of the active compiler") \ 2386 \ 2387 develop(bool, CIPrintCompileQueue, false, \ 2388 "display the contents of the compile queue whenever a " \ 2389 "compilation is enqueued") \ 2390 \ 2391 develop(bool, CIPrintRequests, false, \ 2392 "display every request for compilation") \ 2393 \ 2394 product(bool, CITime, false, \ 2395 "collect timing information for compilation") \ 2396 \ 2397 develop(bool, CITimeEach, false, \ 2398 "display timing information after each successful compilation") \ 2399 \ 2400 develop(bool, CICountOSR, false, \ 2401 "use a separate counter when assigning ids to osr compilations") \ 2402 \ 2403 develop(bool, CICompileNatives, true, \ 2404 "compile native methods if supported by the compiler") \ 2405 \ 2406 develop_pd(bool, CICompileOSR, \ 2407 "compile on stack replacement methods if supported by the " \ 2408 "compiler") \ 2409 \ 2410 develop(bool, CIPrintMethodCodes, false, \ 2411 "print method bytecodes of the compiled code") \ 2412 \ 2413 develop(bool, CIPrintTypeFlow, false, \ 2414 "print the results of ciTypeFlow analysis") \ 2415 \ 2416 develop(bool, CITraceTypeFlow, false, \ 2417 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2418 \ 2419 develop(intx, OSROnlyBCI, -1, \ 2420 "OSR only at this bci. Negative values mean exclude that bci") \ 2421 \ 2422 /* compiler */ \ 2423 \ 2424 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2425 "Number of compiler threads to run") \ 2426 \ 2427 product(intx, CompilationPolicyChoice, 0, \ 2428 "which compilation policy (0/1)") \ 2429 \ 2430 develop(bool, UseStackBanging, true, \ 2431 "use stack banging for stack overflow checks (required for " \ 2432 "proper StackOverflow handling; disable only to measure cost " \ 2433 "of stackbanging)") \ 2434 \ 2435 develop(bool, UseStrictFP, true, \ 2436 "use strict fp if modifier strictfp is set") \ 2437 \ 2438 develop(bool, GenerateSynchronizationCode, true, \ 2439 "generate locking/unlocking code for synchronized methods and " \ 2440 "monitors") \ 2441 \ 2442 develop(bool, GenerateCompilerNullChecks, true, \ 2443 "Generate explicit null checks for loads/stores/calls") \ 2444 \ 2445 develop(bool, GenerateRangeChecks, true, \ 2446 "Generate range checks for array accesses") \ 2447 \ 2448 develop_pd(bool, ImplicitNullChecks, \ 2449 "Generate code for implicit null checks") \ 2450 \ 2451 product(bool, PrintSafepointStatistics, false, \ 2452 "Print statistics about safepoint synchronization") \ 2453 \ 2454 product(intx, PrintSafepointStatisticsCount, 300, \ 2455 "Total number of safepoint statistics collected " \ 2456 "before printing them out") \ 2457 \ 2458 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2459 "Print safepoint statistics only when safepoint takes " \ 2460 "more than PrintSafepointSatisticsTimeout in millis") \ 2461 \ 2462 product(bool, TraceSafepointCleanupTime, false, \ 2463 "Print the break down of clean up tasks performed during " \ 2464 "safepoint") \ 2465 \ 2466 product(bool, Inline, true, \ 2467 "Enable inlining") \ 2468 \ 2469 product(bool, ClipInlining, true, \ 2470 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2471 \ 2472 develop(bool, UseCHA, true, \ 2473 "Enable CHA") \ 2474 \ 2475 product(bool, UseTypeProfile, true, \ 2476 "Check interpreter profile for historically monomorphic calls") \ 2477 \ 2478 notproduct(bool, TimeCompiler, false, \ 2479 "Time the compiler") \ 2480 \ 2481 diagnostic(bool, PrintInlining, false, \ 2482 "Print inlining optimizations") \ 2483 \ 2484 product(bool, UsePopCountInstruction, false, \ 2485 "Use population count instruction") \ 2486 \ 2487 develop(bool, EagerInitialization, false, \ 2488 "Eagerly initialize classes if possible") \ 2489 \ 2490 develop(bool, TraceMethodReplacement, false, \ 2491 "Print when methods are replaced do to recompilation") \ 2492 \ 2493 develop(bool, PrintMethodFlushing, false, \ 2494 "Print the nmethods being flushed") \ 2495 \ 2496 develop(bool, UseRelocIndex, false, \ 2497 "Use an index to speed random access to relocations") \ 2498 \ 2499 develop(bool, StressCodeBuffers, false, \ 2500 "Exercise code buffer expansion and other rare state changes") \ 2501 \ 2502 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2503 "Generate extra debugging information for non-safepoints in " \ 2504 "nmethods") \ 2505 \ 2506 product(bool, PrintVMOptions, false, \ 2507 "Print flags that appeared on the command line") \ 2508 \ 2509 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2510 "Ignore unrecognized VM options") \ 2511 \ 2512 product(bool, PrintCommandLineFlags, false, \ 2513 "Print flags specified on command line or set by ergonomics") \ 2514 \ 2515 product(bool, PrintFlagsInitial, false, \ 2516 "Print all VM flags before argument processing and exit VM") \ 2517 \ 2518 product(bool, PrintFlagsFinal, false, \ 2519 "Print all VM flags after argument and ergonomic processing") \ 2520 \ 2521 notproduct(bool, PrintFlagsWithComments, false, \ 2522 "Print all VM flags with default values and descriptions and " \ 2523 "exit") \ 2524 \ 2525 diagnostic(bool, SerializeVMOutput, true, \ 2526 "Use a mutex to serialize output to tty and LogFile") \ 2527 \ 2528 diagnostic(bool, DisplayVMOutput, true, \ 2529 "Display all VM output on the tty, independently of LogVMOutput") \ 2530 \ 2531 diagnostic(bool, LogVMOutput, false, \ 2532 "Save VM output to LogFile") \ 2533 \ 2534 diagnostic(ccstr, LogFile, NULL, \ 2535 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2536 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2537 \ 2538 product(ccstr, ErrorFile, NULL, \ 2539 "If an error occurs, save the error data to this file " \ 2540 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2541 \ 2542 product(bool, DisplayVMOutputToStderr, false, \ 2543 "If DisplayVMOutput is true, display all VM output to stderr") \ 2544 \ 2545 product(bool, DisplayVMOutputToStdout, false, \ 2546 "If DisplayVMOutput is true, display all VM output to stdout") \ 2547 \ 2548 product(bool, UseHeavyMonitors, false, \ 2549 "use heavyweight instead of lightweight Java monitors") \ 2550 \ 2551 product(bool, PrintStringTableStatistics, false, \ 2552 "print statistics about the StringTable and SymbolTable") \ 2553 \ 2554 diagnostic(bool, VerifyStringTableAtExit, false, \ 2555 "verify StringTable contents at exit") \ 2556 \ 2557 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2558 "print histogram of the symbol table") \ 2559 \ 2560 notproduct(bool, ExitVMOnVerifyError, false, \ 2561 "standard exit from VM if bytecode verify error " \ 2562 "(only in debug mode)") \ 2563 \ 2564 notproduct(ccstr, AbortVMOnException, NULL, \ 2565 "Call fatal if this exception is thrown. Example: " \ 2566 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2567 \ 2568 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2569 "Call fatal if the exception pointed by AbortVMOnException " \ 2570 "has this message") \ 2571 \ 2572 develop(bool, DebugVtables, false, \ 2573 "add debugging code to vtable dispatch") \ 2574 \ 2575 develop(bool, PrintVtables, false, \ 2576 "print vtables when printing klass") \ 2577 \ 2578 notproduct(bool, PrintVtableStats, false, \ 2579 "print vtables stats at end of run") \ 2580 \ 2581 develop(bool, TraceCreateZombies, false, \ 2582 "trace creation of zombie nmethods") \ 2583 \ 2584 notproduct(bool, IgnoreLockingAssertions, false, \ 2585 "disable locking assertions (for speed)") \ 2586 \ 2587 product(bool, RangeCheckElimination, true, \ 2588 "Eliminate range checks") \ 2589 \ 2590 develop_pd(bool, UncommonNullCast, \ 2591 "track occurrences of null in casts; adjust compiler tactics") \ 2592 \ 2593 develop(bool, TypeProfileCasts, true, \ 2594 "treat casts like calls for purposes of type profiling") \ 2595 \ 2596 develop(bool, DelayCompilationDuringStartup, true, \ 2597 "Delay invoking the compiler until main application class is " \ 2598 "loaded") \ 2599 \ 2600 develop(bool, CompileTheWorld, false, \ 2601 "Compile all methods in all classes in bootstrap class path " \ 2602 "(stress test)") \ 2603 \ 2604 develop(bool, CompileTheWorldPreloadClasses, true, \ 2605 "Preload all classes used by a class before start loading") \ 2606 \ 2607 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2608 "Force a safepoint every n compiles so sweeper can keep up") \ 2609 \ 2610 develop(bool, FillDelaySlots, true, \ 2611 "Fill delay slots (on SPARC only)") \ 2612 \ 2613 develop(bool, TimeLivenessAnalysis, false, \ 2614 "Time computation of bytecode liveness analysis") \ 2615 \ 2616 develop(bool, TraceLivenessGen, false, \ 2617 "Trace the generation of liveness analysis information") \ 2618 \ 2619 notproduct(bool, TraceLivenessQuery, false, \ 2620 "Trace queries of liveness analysis information") \ 2621 \ 2622 notproduct(bool, CollectIndexSetStatistics, false, \ 2623 "Collect information about IndexSets") \ 2624 \ 2625 develop(bool, UseLoopSafepoints, true, \ 2626 "Generate Safepoint nodes in every loop") \ 2627 \ 2628 develop(intx, FastAllocateSizeLimit, 128*K, \ 2629 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2630 "Inline allocations larger than this in doublewords must go slow")\ 2631 \ 2632 product(bool, AggressiveOpts, false, \ 2633 "Enable aggressive optimizations - see arguments.cpp") \ 2634 \ 2635 /* statistics */ \ 2636 develop(bool, CountCompiledCalls, false, \ 2637 "Count method invocations") \ 2638 \ 2639 notproduct(bool, CountRuntimeCalls, false, \ 2640 "Count VM runtime calls") \ 2641 \ 2642 develop(bool, CountJNICalls, false, \ 2643 "Count jni method invocations") \ 2644 \ 2645 notproduct(bool, CountJVMCalls, false, \ 2646 "Count jvm method invocations") \ 2647 \ 2648 notproduct(bool, CountRemovableExceptions, false, \ 2649 "Count exceptions that could be replaced by branches due to " \ 2650 "inlining") \ 2651 \ 2652 notproduct(bool, ICMissHistogram, false, \ 2653 "Produce histogram of IC misses") \ 2654 \ 2655 notproduct(bool, PrintClassStatistics, false, \ 2656 "Print class statistics at end of run") \ 2657 \ 2658 notproduct(bool, PrintMethodStatistics, false, \ 2659 "Print method statistics at end of run") \ 2660 \ 2661 /* interpreter */ \ 2662 develop(bool, ClearInterpreterLocals, false, \ 2663 "Always clear local variables of interpreter activations upon " \ 2664 "entry") \ 2665 \ 2666 product_pd(bool, RewriteBytecodes, \ 2667 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2668 \ 2669 product_pd(bool, RewriteFrequentPairs, \ 2670 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2671 \ 2672 diagnostic(bool, PrintInterpreter, false, \ 2673 "Print the generated interpreter code") \ 2674 \ 2675 product(bool, UseInterpreter, true, \ 2676 "Use interpreter for non-compiled methods") \ 2677 \ 2678 develop(bool, UseFastSignatureHandlers, true, \ 2679 "Use fast signature handlers for native calls") \ 2680 \ 2681 product(bool, UseLoopCounter, true, \ 2682 "Increment invocation counter on backward branch") \ 2683 \ 2684 product(bool, UseFastEmptyMethods, true, \ 2685 "Use fast method entry code for empty methods") \ 2686 \ 2687 product(bool, UseFastAccessorMethods, true, \ 2688 "Use fast method entry code for accessor methods") \ 2689 \ 2690 product_pd(bool, UseOnStackReplacement, \ 2691 "Use on stack replacement, calls runtime if invoc. counter " \ 2692 "overflows in loop") \ 2693 \ 2694 notproduct(bool, TraceOnStackReplacement, false, \ 2695 "Trace on stack replacement") \ 2696 \ 2697 product_pd(bool, PreferInterpreterNativeStubs, \ 2698 "Use always interpreter stubs for native methods invoked via " \ 2699 "interpreter") \ 2700 \ 2701 develop(bool, CountBytecodes, false, \ 2702 "Count number of bytecodes executed") \ 2703 \ 2704 develop(bool, PrintBytecodeHistogram, false, \ 2705 "Print histogram of the executed bytecodes") \ 2706 \ 2707 develop(bool, PrintBytecodePairHistogram, false, \ 2708 "Print histogram of the executed bytecode pairs") \ 2709 \ 2710 diagnostic(bool, PrintSignatureHandlers, false, \ 2711 "Print code generated for native method signature handlers") \ 2712 \ 2713 develop(bool, VerifyOops, false, \ 2714 "Do plausibility checks for oops") \ 2715 \ 2716 develop(bool, CheckUnhandledOops, false, \ 2717 "Check for unhandled oops in VM code") \ 2718 \ 2719 develop(bool, VerifyJNIFields, trueInDebug, \ 2720 "Verify jfieldIDs for instance fields") \ 2721 \ 2722 notproduct(bool, VerifyJNIEnvThread, false, \ 2723 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2724 "from JNI") \ 2725 \ 2726 develop(bool, VerifyFPU, false, \ 2727 "Verify FPU state (check for NaN's, etc.)") \ 2728 \ 2729 develop(bool, VerifyThread, false, \ 2730 "Watch the thread register for corruption (SPARC only)") \ 2731 \ 2732 develop(bool, VerifyActivationFrameSize, false, \ 2733 "Verify that activation frame didn't become smaller than its " \ 2734 "minimal size") \ 2735 \ 2736 develop(bool, TraceFrequencyInlining, false, \ 2737 "Trace frequency based inlining") \ 2738 \ 2739 develop_pd(bool, InlineIntrinsics, \ 2740 "Inline intrinsics that can be statically resolved") \ 2741 \ 2742 product_pd(bool, ProfileInterpreter, \ 2743 "Profile at the bytecode level during interpretation") \ 2744 \ 2745 develop_pd(bool, ProfileTraps, \ 2746 "Profile deoptimization traps at the bytecode level") \ 2747 \ 2748 product(intx, ProfileMaturityPercentage, 20, \ 2749 "number of method invocations/branches (expressed as % of " \ 2750 "CompileThreshold) before using the method's profile") \ 2751 \ 2752 develop(bool, PrintMethodData, false, \ 2753 "Print the results of +ProfileInterpreter at end of run") \ 2754 \ 2755 develop(bool, VerifyDataPointer, trueInDebug, \ 2756 "Verify the method data pointer during interpreter profiling") \ 2757 \ 2758 develop(bool, VerifyCompiledCode, false, \ 2759 "Include miscellaneous runtime verifications in nmethod code; " \ 2760 "default off because it disturbs nmethod size heuristics") \ 2761 \ 2762 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2763 "Manually make GC thread crash then dump java stack trace; " \ 2764 "Test only") \ 2765 \ 2766 /* compilation */ \ 2767 product(bool, UseCompiler, true, \ 2768 "Use Just-In-Time compilation") \ 2769 \ 2770 develop(bool, TraceCompilationPolicy, false, \ 2771 "Trace compilation policy") \ 2772 \ 2773 develop(bool, TimeCompilationPolicy, false, \ 2774 "Time the compilation policy") \ 2775 \ 2776 product(bool, UseCounterDecay, true, \ 2777 "Adjust recompilation counters") \ 2778 \ 2779 develop(intx, CounterHalfLifeTime, 30, \ 2780 "Half-life time of invocation counters (in seconds)") \ 2781 \ 2782 develop(intx, CounterDecayMinIntervalLength, 500, \ 2783 "The minimum interval (in milliseconds) between invocation of " \ 2784 "CounterDecay") \ 2785 \ 2786 product(bool, AlwaysCompileLoopMethods, false, \ 2787 "When using recompilation, never interpret methods " \ 2788 "containing loops") \ 2789 \ 2790 product(bool, DontCompileHugeMethods, true, \ 2791 "Do not compile methods > HugeMethodLimit") \ 2792 \ 2793 /* Bytecode escape analysis estimation. */ \ 2794 product(bool, EstimateArgEscape, true, \ 2795 "Analyze bytecodes to estimate escape state of arguments") \ 2796 \ 2797 product(intx, BCEATraceLevel, 0, \ 2798 "How much tracing to do of bytecode escape analysis estimates") \ 2799 \ 2800 product(intx, MaxBCEAEstimateLevel, 5, \ 2801 "Maximum number of nested calls that are analyzed by BC EA") \ 2802 \ 2803 product(intx, MaxBCEAEstimateSize, 150, \ 2804 "Maximum bytecode size of a method to be analyzed by BC EA") \ 2805 \ 2806 product(intx, AllocatePrefetchStyle, 1, \ 2807 "0 = no prefetch, " \ 2808 "1 = prefetch instructions for each allocation, " \ 2809 "2 = use TLAB watermark to gate allocation prefetch, " \ 2810 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2811 \ 2812 product(intx, AllocatePrefetchDistance, -1, \ 2813 "Distance to prefetch ahead of allocation pointer") \ 2814 \ 2815 product(intx, AllocatePrefetchLines, 3, \ 2816 "Number of lines to prefetch ahead of array allocation pointer") \ 2817 \ 2818 product(intx, AllocateInstancePrefetchLines, 1, \ 2819 "Number of lines to prefetch ahead of instance allocation " \ 2820 "pointer") \ 2821 \ 2822 product(intx, AllocatePrefetchStepSize, 16, \ 2823 "Step size in bytes of sequential prefetch instructions") \ 2824 \ 2825 product(intx, AllocatePrefetchInstr, 0, \ 2826 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2827 \ 2828 /* deoptimization */ \ 2829 develop(bool, TraceDeoptimization, false, \ 2830 "Trace deoptimization") \ 2831 \ 2832 develop(bool, DebugDeoptimization, false, \ 2833 "Tracing various information while debugging deoptimization") \ 2834 \ 2835 product(intx, SelfDestructTimer, 0, \ 2836 "Will cause VM to terminate after a given time (in minutes) " \ 2837 "(0 means off)") \ 2838 \ 2839 product(intx, MaxJavaStackTraceDepth, 1024, \ 2840 "The maximum number of lines in the stack trace for Java " \ 2841 "exceptions (0 means all)") \ 2842 \ 2843 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2844 "Guarantee a safepoint (at least) every so many milliseconds " \ 2845 "(0 means none)")) \ 2846 \ 2847 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2848 "Guarantee a safepoint (at least) every so many milliseconds " \ 2849 "(0 means none)")) \ 2850 \ 2851 product(intx, SafepointTimeoutDelay, 10000, \ 2852 "Delay in milliseconds for option SafepointTimeout") \ 2853 \ 2854 product(intx, NmethodSweepFraction, 16, \ 2855 "Number of invocations of sweeper to cover all nmethods") \ 2856 \ 2857 product(intx, NmethodSweepCheckInterval, 5, \ 2858 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2859 \ 2860 notproduct(bool, LogSweeper, false, \ 2861 "Keep a ring buffer of sweeper activity") \ 2862 \ 2863 notproduct(intx, SweeperLogEntries, 1024, \ 2864 "Number of records in the ring buffer of sweeper activity") \ 2865 \ 2866 notproduct(intx, MemProfilingInterval, 500, \ 2867 "Time between each invocation of the MemProfiler") \ 2868 \ 2869 develop(intx, MallocCatchPtr, -1, \ 2870 "Hit breakpoint when mallocing/freeing this pointer") \ 2871 \ 2872 notproduct(intx, AssertRepeat, 1, \ 2873 "number of times to evaluate expression in assert " \ 2874 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2875 \ 2876 notproduct(ccstrlist, SuppressErrorAt, "", \ 2877 "List of assertions (file:line) to muzzle") \ 2878 \ 2879 notproduct(uintx, HandleAllocationLimit, 1024, \ 2880 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2881 "is used") \ 2882 \ 2883 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2884 "Threshold for total handle allocation when " \ 2885 "+TraceHandleAllocation is used") \ 2886 \ 2887 develop(intx, StackPrintLimit, 100, \ 2888 "number of stack frames to print in VM-level stack dump") \ 2889 \ 2890 notproduct(intx, MaxElementPrintSize, 256, \ 2891 "maximum number of elements to print") \ 2892 \ 2893 notproduct(intx, MaxSubklassPrintSize, 4, \ 2894 "maximum number of subklasses to print when printing klass") \ 2895 \ 2896 product(intx, MaxInlineLevel, 9, \ 2897 "maximum number of nested calls that are inlined") \ 2898 \ 2899 product(intx, MaxRecursiveInlineLevel, 1, \ 2900 "maximum number of nested recursive calls that are inlined") \ 2901 \ 2902 product_pd(intx, InlineSmallCode, \ 2903 "Only inline already compiled methods if their code size is " \ 2904 "less than this") \ 2905 \ 2906 product(intx, MaxInlineSize, 35, \ 2907 "The maximum bytecode size of a method to be inlined") \ 2908 \ 2909 product_pd(intx, FreqInlineSize, \ 2910 "The maximum bytecode size of a frequent method to be inlined") \ 2911 \ 2912 product(intx, MaxTrivialSize, 6, \ 2913 "The maximum bytecode size of a trivial method to be inlined") \ 2914 \ 2915 product(intx, MinInliningThreshold, 250, \ 2916 "The minimum invocation count a method needs to have to be " \ 2917 "inlined") \ 2918 \ 2919 develop(intx, MethodHistogramCutoff, 100, \ 2920 "The cutoff value for method invocation histogram (+CountCalls)") \ 2921 \ 2922 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2923 "Number of interpreted methods to show in profile") \ 2924 \ 2925 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2926 "Number of compiled methods to show in profile") \ 2927 \ 2928 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2929 "Number of stub methods to show in profile") \ 2930 \ 2931 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2932 "Number of runtime stub nodes to show in profile") \ 2933 \ 2934 product(intx, ProfileIntervalsTicks, 100, \ 2935 "Number of ticks between printing of interval profile " \ 2936 "(+ProfileIntervals)") \ 2937 \ 2938 notproduct(intx, ScavengeALotInterval, 1, \ 2939 "Interval between which scavenge will occur with +ScavengeALot") \ 2940 \ 2941 notproduct(intx, FullGCALotInterval, 1, \ 2942 "Interval between which full gc will occur with +FullGCALot") \ 2943 \ 2944 notproduct(intx, FullGCALotStart, 0, \ 2945 "For which invocation to start FullGCAlot") \ 2946 \ 2947 notproduct(intx, FullGCALotDummies, 32*K, \ 2948 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2949 "to move") \ 2950 \ 2951 develop(intx, DontYieldALotInterval, 10, \ 2952 "Interval between which yields will be dropped (milliseconds)") \ 2953 \ 2954 develop(intx, MinSleepInterval, 1, \ 2955 "Minimum sleep() interval (milliseconds) when " \ 2956 "ConvertSleepToYield is off (used for Solaris)") \ 2957 \ 2958 develop(intx, ProfilerPCTickThreshold, 15, \ 2959 "Number of ticks in a PC buckets to be a hotspot") \ 2960 \ 2961 notproduct(intx, DeoptimizeALotInterval, 5, \ 2962 "Number of exits until DeoptimizeALot kicks in") \ 2963 \ 2964 notproduct(intx, ZombieALotInterval, 5, \ 2965 "Number of exits until ZombieALot kicks in") \ 2966 \ 2967 develop(bool, StressNonEntrant, false, \ 2968 "Mark nmethods non-entrant at registration") \ 2969 \ 2970 diagnostic(intx, MallocVerifyInterval, 0, \ 2971 "If non-zero, verify C heap after every N calls to " \ 2972 "malloc/realloc/free") \ 2973 \ 2974 diagnostic(intx, MallocVerifyStart, 0, \ 2975 "If non-zero, start verifying C heap after Nth call to " \ 2976 "malloc/realloc/free") \ 2977 \ 2978 diagnostic(uintx, MallocMaxTestWords, 0, \ 2979 "If non-zero, maximum number of words that malloc/realloc can " \ 2980 "allocate (for testing only)") \ 2981 \ 2982 product(intx, TypeProfileWidth, 2, \ 2983 "Number of receiver types to record in call/cast profile") \ 2984 \ 2985 develop(intx, BciProfileWidth, 2, \ 2986 "Number of return bci's to record in ret profile") \ 2987 \ 2988 product(intx, PerMethodRecompilationCutoff, 400, \ 2989 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2990 \ 2991 product(intx, PerBytecodeRecompilationCutoff, 200, \ 2992 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2993 \ 2994 product(intx, PerMethodTrapLimit, 100, \ 2995 "Limit on traps (of one kind) in a method (includes inlines)") \ 2996 \ 2997 product(intx, PerBytecodeTrapLimit, 4, \ 2998 "Limit on traps (of one kind) at a particular BCI") \ 2999 \ 3000 develop(intx, InlineFrequencyRatio, 20, \ 3001 "Ratio of call site execution to caller method invocation") \ 3002 \ 3003 develop_pd(intx, InlineFrequencyCount, \ 3004 "Count of call site execution necessary to trigger frequent " \ 3005 "inlining") \ 3006 \ 3007 develop(intx, InlineThrowCount, 50, \ 3008 "Force inlining of interpreted methods that throw this often") \ 3009 \ 3010 develop(intx, InlineThrowMaxSize, 200, \ 3011 "Force inlining of throwing methods smaller than this") \ 3012 \ 3013 develop(intx, ProfilerNodeSize, 1024, \ 3014 "Size in K to allocate for the Profile Nodes of each thread") \ 3015 \ 3016 product_pd(intx, PreInflateSpin, \ 3017 "Number of times to spin wait before inflation") \ 3018 \ 3019 /* gc parameters */ \ 3020 product(uintx, InitialHeapSize, 0, \ 3021 "Initial heap size (in bytes); zero means use ergonomics") \ 3022 \ 3023 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 3024 "Maximum heap size (in bytes)") \ 3025 \ 3026 product(uintx, OldSize, ScaleForWordSize(4*M), \ 3027 "Initial tenured generation size (in bytes)") \ 3028 \ 3029 product(uintx, NewSize, ScaleForWordSize(1*M), \ 3030 "Initial new generation size (in bytes)") \ 3031 \ 3032 product(uintx, MaxNewSize, max_uintx, \ 3033 "Maximum new generation size (in bytes), max_uintx means set " \ 3034 "ergonomically") \ 3035 \ 3036 product(uintx, PretenureSizeThreshold, 0, \ 3037 "Maximum size in bytes of objects allocated in DefNew " \ 3038 "generation; zero means no maximum") \ 3039 \ 3040 product(uintx, TLABSize, 0, \ 3041 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3042 \ 3043 product(uintx, MinTLABSize, 2*K, \ 3044 "Minimum allowed TLAB size (in bytes)") \ 3045 \ 3046 product(uintx, TLABAllocationWeight, 35, \ 3047 "Allocation averaging weight") \ 3048 \ 3049 product(uintx, TLABWasteTargetPercent, 1, \ 3050 "Percentage of Eden that can be wasted") \ 3051 \ 3052 product(uintx, TLABRefillWasteFraction, 64, \ 3053 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3054 \ 3055 product(uintx, TLABWasteIncrement, 4, \ 3056 "Increment allowed waste at slow allocation") \ 3057 \ 3058 product(uintx, SurvivorRatio, 8, \ 3059 "Ratio of eden/survivor space size") \ 3060 \ 3061 product(uintx, NewRatio, 2, \ 3062 "Ratio of old/new generation sizes") \ 3063 \ 3064 product_pd(uintx, NewSizeThreadIncrease, \ 3065 "Additional size added to desired new generation size per " \ 3066 "non-daemon thread (in bytes)") \ 3067 \ 3068 product_pd(uintx, MetaspaceSize, \ 3069 "Initial size of Metaspaces (in bytes)") \ 3070 \ 3071 product(uintx, MaxMetaspaceSize, max_uintx, \ 3072 "Maximum size of Metaspaces (in bytes)") \ 3073 \ 3074 product(uintx, CompressedClassSpaceSize, 1*G, \ 3075 "Maximum size of class area in Metaspace when compressed " \ 3076 "class pointers are used") \ 3077 \ 3078 product(uintx, MinHeapFreeRatio, 40, \ 3079 "The minimum percentage of heap free after GC to avoid expansion")\ 3080 \ 3081 product(uintx, MaxHeapFreeRatio, 70, \ 3082 "The maximum percentage of heap free after GC to avoid shrinking")\ 3083 \ 3084 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3085 "Number of milliseconds per MB of free space in the heap") \ 3086 \ 3087 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3088 "The minimum change in heap space due to GC (in bytes)") \ 3089 \ 3090 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3091 "The minimum expansion of Metaspace (in bytes)") \ 3092 \ 3093 product(uintx, MinMetaspaceFreeRatio, 40, \ 3094 "The minimum percentage of Metaspace free after GC to avoid " \ 3095 "expansion") \ 3096 \ 3097 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3098 "The maximum percentage of Metaspace free after GC to avoid " \ 3099 "shrinking") \ 3100 \ 3101 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3102 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3103 \ 3104 product(uintx, QueuedAllocationWarningCount, 0, \ 3105 "Number of times an allocation that queues behind a GC " \ 3106 "will retry before printing a warning") \ 3107 \ 3108 diagnostic(uintx, VerifyGCStartAt, 0, \ 3109 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3110 \ 3111 diagnostic(intx, VerifyGCLevel, 0, \ 3112 "Generation level at which to start +VerifyBefore/AfterGC") \ 3113 \ 3114 product(uintx, MaxTenuringThreshold, 15, \ 3115 "Maximum value for tenuring threshold") \ 3116 \ 3117 product(uintx, InitialTenuringThreshold, 7, \ 3118 "Initial value for tenuring threshold") \ 3119 \ 3120 product(uintx, TargetSurvivorRatio, 50, \ 3121 "Desired percentage of survivor space used after scavenge") \ 3122 \ 3123 product(uintx, MarkSweepDeadRatio, 5, \ 3124 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3125 "Serial mark sweep treats this as both the minimum and maximum " \ 3126 "value. " \ 3127 "CMS uses this value only if it falls back to mark sweep. " \ 3128 "Par compact uses a variable scale based on the density of the " \ 3129 "generation and treats this as the maximum value when the heap " \ 3130 "is either completely full or completely empty. Par compact " \ 3131 "also has a smaller default value; see arguments.cpp.") \ 3132 \ 3133 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3134 "How often should we fully compact the heap (ignoring the dead " \ 3135 "space parameters)") \ 3136 \ 3137 product(intx, PrintCMSStatistics, 0, \ 3138 "Statistics for CMS") \ 3139 \ 3140 product(bool, PrintCMSInitiationStatistics, false, \ 3141 "Statistics for initiating a CMS collection") \ 3142 \ 3143 product(intx, PrintFLSStatistics, 0, \ 3144 "Statistics for CMS' FreeListSpace") \ 3145 \ 3146 product(intx, PrintFLSCensus, 0, \ 3147 "Census for CMS' FreeListSpace") \ 3148 \ 3149 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3150 "Delay between expansion and allocation (in milliseconds)") \ 3151 \ 3152 develop(uintx, GCWorkerDelayMillis, 0, \ 3153 "Delay in scheduling GC workers (in milliseconds)") \ 3154 \ 3155 product(intx, DeferThrSuspendLoopCount, 4000, \ 3156 "(Unstable) Number of times to iterate in safepoint loop " \ 3157 "before blocking VM threads ") \ 3158 \ 3159 product(intx, DeferPollingPageLoopCount, -1, \ 3160 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3161 "before changing safepoint polling page to RO ") \ 3162 \ 3163 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3164 \ 3165 product(bool, PSChunkLargeArrays, true, \ 3166 "Process large arrays in chunks") \ 3167 \ 3168 product(uintx, GCDrainStackTargetSize, 64, \ 3169 "Number of entries we will try to leave on the stack " \ 3170 "during parallel gc") \ 3171 \ 3172 /* stack parameters */ \ 3173 product_pd(intx, StackYellowPages, \ 3174 "Number of yellow zone (recoverable overflows) pages") \ 3175 \ 3176 product_pd(intx, StackRedPages, \ 3177 "Number of red zone (unrecoverable overflows) pages") \ 3178 \ 3179 product_pd(intx, StackShadowPages, \ 3180 "Number of shadow zone (for overflow checking) pages " \ 3181 "this should exceed the depth of the VM and native call stack") \ 3182 \ 3183 product_pd(intx, ThreadStackSize, \ 3184 "Thread Stack Size (in Kbytes)") \ 3185 \ 3186 product_pd(intx, VMThreadStackSize, \ 3187 "Non-Java Thread Stack Size (in Kbytes)") \ 3188 \ 3189 product_pd(intx, CompilerThreadStackSize, \ 3190 "Compiler Thread Stack Size (in Kbytes)") \ 3191 \ 3192 develop_pd(uintx, JVMInvokeMethodSlack, \ 3193 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3194 \ 3195 product(uintx, ThreadSafetyMargin, 50*M, \ 3196 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3197 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3198 "disable this feature") \ 3199 \ 3200 /* code cache parameters */ \ 3201 develop(uintx, CodeCacheSegmentSize, 64, \ 3202 "Code cache segment size (in bytes) - smallest unit of " \ 3203 "allocation") \ 3204 \ 3205 develop_pd(intx, CodeEntryAlignment, \ 3206 "Code entry alignment for generated code (in bytes)") \ 3207 \ 3208 product_pd(intx, OptoLoopAlignment, \ 3209 "Align inner loops to zero relative to this modulus") \ 3210 \ 3211 product_pd(uintx, InitialCodeCacheSize, \ 3212 "Initial code cache size (in bytes)") \ 3213 \ 3214 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3215 "Minimum code cache size (in bytes) required to start VM.") \ 3216 \ 3217 product_pd(uintx, ReservedCodeCacheSize, \ 3218 "Reserved code cache size (in bytes) - maximum code cache size") \ 3219 \ 3220 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3221 "When less than X space left, we stop compiling") \ 3222 \ 3223 product_pd(uintx, CodeCacheExpansionSize, \ 3224 "Code cache expansion size (in bytes)") \ 3225 \ 3226 develop_pd(uintx, CodeCacheMinBlockLength, \ 3227 "Minimum number of segments in a code cache block") \ 3228 \ 3229 notproduct(bool, ExitOnFullCodeCache, false, \ 3230 "Exit the VM if we fill the code cache") \ 3231 \ 3232 product(bool, UseCodeCacheFlushing, true, \ 3233 "Attempt to clean the code cache before shutting off compiler") \ 3234 \ 3235 product(intx, MinCodeCacheFlushingInterval, 30, \ 3236 "Minimum number of seconds between code cache cleaning sessions") \ 3237 \ 3238 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3239 "When less than X space left, start code cache cleaning") \ 3240 \ 3241 product(uintx, CodeCacheFlushingFraction, 2, \ 3242 "Fraction of the code cache that is flushed when full") \ 3243 \ 3244 /* interpreter debugging */ \ 3245 develop(intx, BinarySwitchThreshold, 5, \ 3246 "Minimal number of lookupswitch entries for rewriting to binary " \ 3247 "switch") \ 3248 \ 3249 develop(intx, StopInterpreterAt, 0, \ 3250 "Stop interpreter execution at specified bytecode number") \ 3251 \ 3252 develop(intx, TraceBytecodesAt, 0, \ 3253 "Trace bytecodes starting with specified bytecode number") \ 3254 \ 3255 /* compiler interface */ \ 3256 develop(intx, CIStart, 0, \ 3257 "The id of the first compilation to permit") \ 3258 \ 3259 develop(intx, CIStop, -1, \ 3260 "The id of the last compilation to permit") \ 3261 \ 3262 develop(intx, CIStartOSR, 0, \ 3263 "The id of the first osr compilation to permit " \ 3264 "(CICountOSR must be on)") \ 3265 \ 3266 develop(intx, CIStopOSR, -1, \ 3267 "The id of the last osr compilation to permit " \ 3268 "(CICountOSR must be on)") \ 3269 \ 3270 develop(intx, CIBreakAtOSR, -1, \ 3271 "The id of osr compilation to break at") \ 3272 \ 3273 develop(intx, CIBreakAt, -1, \ 3274 "The id of compilation to break at") \ 3275 \ 3276 product(ccstrlist, CompileOnly, "", \ 3277 "List of methods (pkg/class.name) to restrict compilation to") \ 3278 \ 3279 product(ccstr, CompileCommandFile, NULL, \ 3280 "Read compiler commands from this file [.hotspot_compiler]") \ 3281 \ 3282 product(ccstrlist, CompileCommand, "", \ 3283 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3284 \ 3285 develop(bool, ReplayCompiles, false, \ 3286 "Enable replay of compilations from ReplayDataFile") \ 3287 \ 3288 product(ccstr, ReplayDataFile, NULL, \ 3289 "File containing compilation replay information" \ 3290 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3291 \ 3292 develop(intx, ReplaySuppressInitializers, 2, \ 3293 "Control handling of class initialization during replay: " \ 3294 "0 - don't do anything special; " \ 3295 "1 - treat all class initializers as empty; " \ 3296 "2 - treat class initializers for application classes as empty; " \ 3297 "3 - allow all class initializers to run during bootstrap but " \ 3298 " pretend they are empty after starting replay") \ 3299 \ 3300 develop(bool, ReplayIgnoreInitErrors, false, \ 3301 "Ignore exceptions thrown during initialization for replay") \ 3302 \ 3303 product(bool, DumpReplayDataOnError, true, \ 3304 "Record replay data for crashing compiler threads") \ 3305 \ 3306 product(bool, CICompilerCountPerCPU, false, \ 3307 "1 compiler thread for log(N CPUs)") \ 3308 \ 3309 develop(intx, CIFireOOMAt, -1, \ 3310 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3311 "(non-negative value throws OOM after this many CI accesses " \ 3312 "in each compile)") \ 3313 notproduct(intx, CICrashAt, -1, \ 3314 "id of compilation to trigger assert in compiler thread for " \ 3315 "the purpose of testing, e.g. generation of replay data") \ 3316 notproduct(bool, CIObjectFactoryVerify, false, \ 3317 "enable potentially expensive verification in ciObjectFactory") \ 3318 \ 3319 /* Priorities */ \ 3320 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3321 \ 3322 product(intx, ThreadPriorityPolicy, 0, \ 3323 "0 : Normal. "\ 3324 " VM chooses priorities that are appropriate for normal "\ 3325 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3326 " to normal native priority. Java priorities below " \ 3327 " NORM_PRIORITY map to lower native priority values. On "\ 3328 " Windows applications are allowed to use higher native "\ 3329 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3330 " not use the highest possible native priority, "\ 3331 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3332 " system threads. On Linux thread priorities are ignored "\ 3333 " because the OS does not support static priority in "\ 3334 " SCHED_OTHER scheduling class which is the only choice for "\ 3335 " non-root, non-realtime applications. "\ 3336 "1 : Aggressive. "\ 3337 " Java thread priorities map over to the entire range of "\ 3338 " native thread priorities. Higher Java thread priorities map "\ 3339 " to higher native thread priorities. This policy should be "\ 3340 " used with care, as sometimes it can cause performance "\ 3341 " degradation in the application and/or the entire system. On "\ 3342 " Linux this policy requires root privilege.") \ 3343 \ 3344 product(bool, ThreadPriorityVerbose, false, \ 3345 "Print priority changes") \ 3346 \ 3347 product(intx, DefaultThreadPriority, -1, \ 3348 "The native priority at which threads run if not elsewhere " \ 3349 "specified (-1 means no change)") \ 3350 \ 3351 product(intx, CompilerThreadPriority, -1, \ 3352 "The native priority at which compiler threads should run " \ 3353 "(-1 means no change)") \ 3354 \ 3355 product(intx, VMThreadPriority, -1, \ 3356 "The native priority at which the VM thread should run " \ 3357 "(-1 means no change)") \ 3358 \ 3359 product(bool, CompilerThreadHintNoPreempt, true, \ 3360 "(Solaris only) Give compiler threads an extra quanta") \ 3361 \ 3362 product(bool, VMThreadHintNoPreempt, false, \ 3363 "(Solaris only) Give VM thread an extra quanta") \ 3364 \ 3365 product(intx, JavaPriority1_To_OSPriority, -1, \ 3366 "Map Java priorities to OS priorities") \ 3367 \ 3368 product(intx, JavaPriority2_To_OSPriority, -1, \ 3369 "Map Java priorities to OS priorities") \ 3370 \ 3371 product(intx, JavaPriority3_To_OSPriority, -1, \ 3372 "Map Java priorities to OS priorities") \ 3373 \ 3374 product(intx, JavaPriority4_To_OSPriority, -1, \ 3375 "Map Java priorities to OS priorities") \ 3376 \ 3377 product(intx, JavaPriority5_To_OSPriority, -1, \ 3378 "Map Java priorities to OS priorities") \ 3379 \ 3380 product(intx, JavaPriority6_To_OSPriority, -1, \ 3381 "Map Java priorities to OS priorities") \ 3382 \ 3383 product(intx, JavaPriority7_To_OSPriority, -1, \ 3384 "Map Java priorities to OS priorities") \ 3385 \ 3386 product(intx, JavaPriority8_To_OSPriority, -1, \ 3387 "Map Java priorities to OS priorities") \ 3388 \ 3389 product(intx, JavaPriority9_To_OSPriority, -1, \ 3390 "Map Java priorities to OS priorities") \ 3391 \ 3392 product(intx, JavaPriority10_To_OSPriority,-1, \ 3393 "Map Java priorities to OS priorities") \ 3394 \ 3395 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3396 "Java thread priority 10 maps to critical scheduling priority") \ 3397 \ 3398 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3399 "Compiler thread(s) run at critical scheduling priority") \ 3400 \ 3401 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3402 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3403 \ 3404 /* compiler debugging */ \ 3405 notproduct(intx, CompileTheWorldStartAt, 1, \ 3406 "First class to consider when using +CompileTheWorld") \ 3407 \ 3408 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3409 "Last class to consider when using +CompileTheWorld") \ 3410 \ 3411 develop(intx, NewCodeParameter, 0, \ 3412 "Testing Only: Create a dedicated integer parameter before " \ 3413 "putback") \ 3414 \ 3415 /* new oopmap storage allocation */ \ 3416 develop(intx, MinOopMapAllocation, 8, \ 3417 "Minimum number of OopMap entries in an OopMapSet") \ 3418 \ 3419 /* Background Compilation */ \ 3420 develop(intx, LongCompileThreshold, 50, \ 3421 "Used with +TraceLongCompiles") \ 3422 \ 3423 product(intx, StarvationMonitorInterval, 200, \ 3424 "Pause between each check (in milliseconds)") \ 3425 \ 3426 /* recompilation */ \ 3427 product_pd(intx, CompileThreshold, \ 3428 "number of interpreted method invocations before (re-)compiling") \ 3429 \ 3430 product_pd(intx, BackEdgeThreshold, \ 3431 "Interpreter Back edge threshold at which an OSR compilation is " \ 3432 "invoked") \ 3433 \ 3434 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3435 "Interpreter (tier 0) invocation notification frequency") \ 3436 \ 3437 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3438 "C1 without MDO (tier 2) invocation notification frequency") \ 3439 \ 3440 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3441 "C1 with MDO profiling (tier 3) invocation notification " \ 3442 "frequency") \ 3443 \ 3444 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3445 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3446 \ 3447 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3448 "Interpreter (tier 0) invocation notification frequency") \ 3449 \ 3450 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3451 "C1 without MDO (tier 2) invocation notification frequency") \ 3452 \ 3453 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3454 "C1 with MDO profiling (tier 3) invocation notification " \ 3455 "frequency") \ 3456 \ 3457 product(intx, Tier2CompileThreshold, 0, \ 3458 "threshold at which tier 2 compilation is invoked") \ 3459 \ 3460 product(intx, Tier2BackEdgeThreshold, 0, \ 3461 "Back edge threshold at which tier 2 compilation is invoked") \ 3462 \ 3463 product(intx, Tier3InvocationThreshold, 200, \ 3464 "Compile if number of method invocations crosses this " \ 3465 "threshold") \ 3466 \ 3467 product(intx, Tier3MinInvocationThreshold, 100, \ 3468 "Minimum invocation to compile at tier 3") \ 3469 \ 3470 product(intx, Tier3CompileThreshold, 2000, \ 3471 "Threshold at which tier 3 compilation is invoked (invocation " \ 3472 "minimum must be satisfied") \ 3473 \ 3474 product(intx, Tier3BackEdgeThreshold, 60000, \ 3475 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3476 \ 3477 product(intx, Tier4InvocationThreshold, 5000, \ 3478 "Compile if number of method invocations crosses this " \ 3479 "threshold") \ 3480 \ 3481 product(intx, Tier4MinInvocationThreshold, 600, \ 3482 "Minimum invocation to compile at tier 4") \ 3483 \ 3484 product(intx, Tier4CompileThreshold, 15000, \ 3485 "Threshold at which tier 4 compilation is invoked (invocation " \ 3486 "minimum must be satisfied") \ 3487 \ 3488 product(intx, Tier4BackEdgeThreshold, 40000, \ 3489 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3490 \ 3491 product(intx, Tier3DelayOn, 5, \ 3492 "If C2 queue size grows over this amount per compiler thread " \ 3493 "stop compiling at tier 3 and start compiling at tier 2") \ 3494 \ 3495 product(intx, Tier3DelayOff, 2, \ 3496 "If C2 queue size is less than this amount per compiler thread " \ 3497 "allow methods compiled at tier 2 transition to tier 3") \ 3498 \ 3499 product(intx, Tier3LoadFeedback, 5, \ 3500 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3501 "reaches this amount per compiler thread") \ 3502 \ 3503 product(intx, Tier4LoadFeedback, 3, \ 3504 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3505 "reaches this amount per compiler thread") \ 3506 \ 3507 product(intx, TieredCompileTaskTimeout, 50, \ 3508 "Kill compile task if method was not used within " \ 3509 "given timeout in milliseconds") \ 3510 \ 3511 product(intx, TieredStopAtLevel, 4, \ 3512 "Stop at given compilation level") \ 3513 \ 3514 product(intx, Tier0ProfilingStartPercentage, 200, \ 3515 "Start profiling in interpreter if the counters exceed tier 3 " \ 3516 "thresholds by the specified percentage") \ 3517 \ 3518 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3519 "Increase the compile threshold for C1 compilation if the code " \ 3520 "cache is filled by the specified percentage") \ 3521 \ 3522 product(intx, TieredRateUpdateMinTime, 1, \ 3523 "Minimum rate sampling interval (in milliseconds)") \ 3524 \ 3525 product(intx, TieredRateUpdateMaxTime, 25, \ 3526 "Maximum rate sampling interval (in milliseconds)") \ 3527 \ 3528 product_pd(bool, TieredCompilation, \ 3529 "Enable tiered compilation") \ 3530 \ 3531 product(bool, PrintTieredEvents, false, \ 3532 "Print tiered events notifications") \ 3533 \ 3534 product_pd(intx, OnStackReplacePercentage, \ 3535 "NON_TIERED number of method invocations/branches (expressed as " \ 3536 "% of CompileThreshold) before (re-)compiling OSR code") \ 3537 \ 3538 product(intx, InterpreterProfilePercentage, 33, \ 3539 "NON_TIERED number of method invocations/branches (expressed as " \ 3540 "% of CompileThreshold) before profiling in the interpreter") \ 3541 \ 3542 develop(intx, MaxRecompilationSearchLength, 10, \ 3543 "The maximum number of frames to inspect when searching for " \ 3544 "recompilee") \ 3545 \ 3546 develop(intx, MaxInterpretedSearchLength, 3, \ 3547 "The maximum number of interpreted frames to skip when searching "\ 3548 "for recompilee") \ 3549 \ 3550 develop(intx, DesiredMethodLimit, 8000, \ 3551 "The desired maximum method size (in bytecodes) after inlining") \ 3552 \ 3553 develop(intx, HugeMethodLimit, 8000, \ 3554 "Don't compile methods larger than this if " \ 3555 "+DontCompileHugeMethods") \ 3556 \ 3557 /* New JDK 1.4 reflection implementation */ \ 3558 \ 3559 develop(bool, UseNewReflection, true, \ 3560 "Temporary flag for transition to reflection based on dynamic " \ 3561 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3562 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3563 "changes were needed") \ 3564 \ 3565 develop(bool, VerifyReflectionBytecodes, false, \ 3566 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3567 "in situations like that described in 4486457 or for " \ 3568 "constructors generated for serialization, so can not be enabled "\ 3569 "in product.") \ 3570 \ 3571 product(bool, ReflectionWrapResolutionErrors, true, \ 3572 "Temporary flag for transition to AbstractMethodError wrapped " \ 3573 "in InvocationTargetException. See 6531596") \ 3574 \ 3575 develop(bool, VerifyLambdaBytecodes, false, \ 3576 "Force verification of jdk 8 lambda metafactory bytecodes") \ 3577 \ 3578 develop(intx, FastSuperclassLimit, 8, \ 3579 "Depth of hardwired instanceof accelerator array") \ 3580 \ 3581 /* Properties for Java libraries */ \ 3582 \ 3583 product(uintx, MaxDirectMemorySize, 0, \ 3584 "Maximum total size of NIO direct-buffer allocations") \ 3585 \ 3586 /* temporary developer defined flags */ \ 3587 \ 3588 diagnostic(bool, UseNewCode, false, \ 3589 "Testing Only: Use the new version while testing") \ 3590 \ 3591 diagnostic(bool, UseNewCode2, false, \ 3592 "Testing Only: Use the new version while testing") \ 3593 \ 3594 diagnostic(bool, UseNewCode3, false, \ 3595 "Testing Only: Use the new version while testing") \ 3596 \ 3597 /* flags for performance data collection */ \ 3598 \ 3599 product(bool, UsePerfData, falseInEmbedded, \ 3600 "Flag to disable jvmstat instrumentation for performance testing "\ 3601 "and problem isolation purposes") \ 3602 \ 3603 product(bool, PerfDataSaveToFile, false, \ 3604 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3605 \ 3606 product(ccstr, PerfDataSaveFile, NULL, \ 3607 "Save PerfData memory to the specified absolute pathname. " \ 3608 "The string %p in the file name (if present) " \ 3609 "will be replaced by pid") \ 3610 \ 3611 product(intx, PerfDataSamplingInterval, 50, \ 3612 "Data sampling interval (in milliseconds)") \ 3613 \ 3614 develop(bool, PerfTraceDataCreation, false, \ 3615 "Trace creation of Performance Data Entries") \ 3616 \ 3617 develop(bool, PerfTraceMemOps, false, \ 3618 "Trace PerfMemory create/attach/detach calls") \ 3619 \ 3620 product(bool, PerfDisableSharedMem, false, \ 3621 "Store performance data in standard memory") \ 3622 \ 3623 product(intx, PerfDataMemorySize, 32*K, \ 3624 "Size of performance data memory region. Will be rounded " \ 3625 "up to a multiple of the native os page size.") \ 3626 \ 3627 product(intx, PerfMaxStringConstLength, 1024, \ 3628 "Maximum PerfStringConstant string length before truncation") \ 3629 \ 3630 product(bool, PerfAllowAtExitRegistration, false, \ 3631 "Allow registration of atexit() methods") \ 3632 \ 3633 product(bool, PerfBypassFileSystemCheck, false, \ 3634 "Bypass Win32 file system criteria checks (Windows Only)") \ 3635 \ 3636 product(intx, UnguardOnExecutionViolation, 0, \ 3637 "Unguard page and retry on no-execute fault (Win32 only) " \ 3638 "0=off, 1=conservative, 2=aggressive") \ 3639 \ 3640 /* Serviceability Support */ \ 3641 \ 3642 product(bool, ManagementServer, false, \ 3643 "Create JMX Management Server") \ 3644 \ 3645 product(bool, DisableAttachMechanism, false, \ 3646 "Disable mechanism that allows tools to attach to this VM") \ 3647 \ 3648 product(bool, StartAttachListener, false, \ 3649 "Always start Attach Listener at VM startup") \ 3650 \ 3651 manageable(bool, PrintConcurrentLocks, false, \ 3652 "Print java.util.concurrent locks in thread dump") \ 3653 \ 3654 product(bool, TransmitErrorReport, false, \ 3655 "Enable error report transmission on erroneous termination") \ 3656 \ 3657 product(ccstr, ErrorReportServer, NULL, \ 3658 "Override built-in error report server address") \ 3659 \ 3660 /* Shared spaces */ \ 3661 \ 3662 product(bool, UseSharedSpaces, true, \ 3663 "Use shared spaces for metadata") \ 3664 \ 3665 product(bool, RequireSharedSpaces, false, \ 3666 "Require shared spaces for metadata") \ 3667 \ 3668 product(bool, DumpSharedSpaces, false, \ 3669 "Special mode: JVM reads a class list, loads classes, builds " \ 3670 "shared spaces, and dumps the shared spaces to a file to be " \ 3671 "used in future JVM runs") \ 3672 \ 3673 product(bool, PrintSharedSpaces, false, \ 3674 "Print usage of shared spaces") \ 3675 \ 3676 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3677 "Size of read-write space for metadata (in bytes)") \ 3678 \ 3679 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3680 "Size of read-only space for metadata (in bytes)") \ 3681 \ 3682 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3683 "Size of the shared miscellaneous data area (in bytes)") \ 3684 \ 3685 product(uintx, SharedMiscCodeSize, 120*K, \ 3686 "Size of the shared miscellaneous code area (in bytes)") \ 3687 \ 3688 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \ 3689 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 3690 "Address to allocate shared memory region for class data") \ 3691 \ 3692 diagnostic(bool, EnableInvokeDynamic, true, \ 3693 "support JSR 292 (method handles, invokedynamic, " \ 3694 "anonymous classes") \ 3695 \ 3696 diagnostic(bool, PrintMethodHandleStubs, false, \ 3697 "Print generated stub code for method handles") \ 3698 \ 3699 develop(bool, TraceMethodHandles, false, \ 3700 "trace internal method handle operations") \ 3701 \ 3702 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3703 "perform extra checks when constructing method handles") \ 3704 \ 3705 diagnostic(bool, ShowHiddenFrames, false, \ 3706 "show method handle implementation frames (usually hidden)") \ 3707 \ 3708 experimental(bool, TrustFinalNonStaticFields, false, \ 3709 "trust final non-static declarations for constant folding") \ 3710 \ 3711 experimental(bool, FoldStableValues, false, \ 3712 "Private flag to control optimizations for stable variables") \ 3713 \ 3714 develop(bool, TraceInvokeDynamic, false, \ 3715 "trace internal invoke dynamic operations") \ 3716 \ 3717 diagnostic(bool, PauseAtStartup, false, \ 3718 "Causes the VM to pause at startup time and wait for the pause " \ 3719 "file to be removed (default: ./vm.paused.<pid>)") \ 3720 \ 3721 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3722 "The file to create and for whose removal to await when pausing " \ 3723 "at startup. (default: ./vm.paused.<pid>)") \ 3724 \ 3725 diagnostic(bool, PauseAtExit, false, \ 3726 "Pause and wait for keypress on exit if a debugger is attached") \ 3727 \ 3728 product(bool, ExtendedDTraceProbes, false, \ 3729 "Enable performance-impacting dtrace probes") \ 3730 \ 3731 product(bool, DTraceMethodProbes, false, \ 3732 "Enable dtrace probes for method-entry and method-exit") \ 3733 \ 3734 product(bool, DTraceAllocProbes, false, \ 3735 "Enable dtrace probes for object allocation") \ 3736 \ 3737 product(bool, DTraceMonitorProbes, false, \ 3738 "Enable dtrace probes for monitor events") \ 3739 \ 3740 product(bool, RelaxAccessControlCheck, false, \ 3741 "Relax the access control checks in the verifier") \ 3742 \ 3743 diagnostic(bool, PrintDTraceDOF, false, \ 3744 "Print the DTrace DOF passed to the system for JSDT probes") \ 3745 \ 3746 product(uintx, StringTableSize, defaultStringTableSize, \ 3747 "Number of buckets in the interned String table") \ 3748 \ 3749 develop(bool, TraceDefaultMethods, false, \ 3750 "Trace the default method processing steps") \ 3751 \ 3752 develop(bool, VerifyGenericSignatures, false, \ 3753 "Abort VM on erroneous or inconsistent generic signatures") \ 3754 \ 3755 product(bool, UseVMInterruptibleIO, false, \ 3756 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3757 "EINTR for I/O operations results in OS_INTRPT. The default " \ 3758 "value of this flag is true for JDK 6 and earlier") \ 3759 \ 3760 diagnostic(bool, WhiteBoxAPI, false, \ 3761 "Enable internal testing APIs") \ 3762 \ 3763 product(bool, PrintGCCause, true, \ 3764 "Include GC cause in GC logging") \ 3765 \ 3766 product(bool , AllowNonVirtualCalls, false, \ 3767 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 3768 \ 3769 diagnostic(ccstr, SharedArchiveFile, NULL, \ 3770 "Override the default location of the CDS archive file") \ 3771 \ 3772 experimental(uintx, ArrayAllocatorMallocLimit, \ 3773 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \ 3774 "Allocation less than this value will be allocated " \ 3775 "using malloc. Larger allocations will use mmap.") \ 3776 \ 3777 product(bool, EnableTracing, false, \ 3778 "Enable event-based tracing") \ 3779 \ 3780 product(bool, UseLockedTracing, false, \ 3781 "Use locked-tracing when doing event-based tracing") 3782 3783 3784/* 3785 * Macros for factoring of globals 3786 */ 3787 3788// Interface macros 3789#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3790#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3791#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3792#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3793#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3794#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3795#ifdef PRODUCT 3796#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3797#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3798#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3799#else 3800#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3801#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3802#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3803#endif 3804// Special LP64 flags, product only needed for now. 3805#ifdef _LP64 3806#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3807#else 3808#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3809#endif // _LP64 3810 3811// Implementation macros 3812#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3813#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3814#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3815#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3816#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3817#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3818#ifdef PRODUCT 3819#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3820#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3821#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3822#else 3823#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3824#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3825#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3826#endif 3827#ifdef _LP64 3828#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3829#else 3830#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3831#endif // _LP64 3832 3833RUNTIME_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) 3834 3835RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3836 3837ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG) 3838 3839// Extensions 3840 3841#include "runtime/globals_ext.hpp" 3842 3843#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3844