globals.hpp revision 363:032ddb9432ad
1/* 2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25#if !defined(COMPILER1) && !defined(COMPILER2) 26define_pd_global(bool, BackgroundCompilation, false); 27define_pd_global(bool, UseTLAB, false); 28define_pd_global(bool, CICompileOSR, false); 29define_pd_global(bool, UseTypeProfile, false); 30define_pd_global(bool, UseOnStackReplacement, false); 31define_pd_global(bool, InlineIntrinsics, false); 32define_pd_global(bool, PreferInterpreterNativeStubs, true); 33define_pd_global(bool, ProfileInterpreter, false); 34define_pd_global(bool, ProfileTraps, false); 35define_pd_global(bool, TieredCompilation, false); 36 37define_pd_global(intx, CompileThreshold, 0); 38define_pd_global(intx, Tier2CompileThreshold, 0); 39define_pd_global(intx, Tier3CompileThreshold, 0); 40define_pd_global(intx, Tier4CompileThreshold, 0); 41 42define_pd_global(intx, BackEdgeThreshold, 0); 43define_pd_global(intx, Tier2BackEdgeThreshold, 0); 44define_pd_global(intx, Tier3BackEdgeThreshold, 0); 45define_pd_global(intx, Tier4BackEdgeThreshold, 0); 46 47define_pd_global(intx, OnStackReplacePercentage, 0); 48define_pd_global(bool, ResizeTLAB, false); 49define_pd_global(intx, FreqInlineSize, 0); 50define_pd_global(intx, NewSizeThreadIncrease, 4*K); 51define_pd_global(intx, NewRatio, 4); 52define_pd_global(intx, InlineClassNatives, true); 53define_pd_global(intx, InlineUnsafeOps, true); 54define_pd_global(intx, InitialCodeCacheSize, 160*K); 55define_pd_global(intx, ReservedCodeCacheSize, 32*M); 56define_pd_global(intx, CodeCacheExpansionSize, 32*K); 57define_pd_global(intx, CodeCacheMinBlockLength, 1); 58define_pd_global(uintx,PermSize, ScaleForWordSize(4*M)); 59define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M)); 60define_pd_global(bool, NeverActAsServerClassMachine, true); 61define_pd_global(uintx, DefaultMaxRAM, 1*G); 62#define CI_COMPILER_COUNT 0 63#else 64 65#ifdef COMPILER2 66#define CI_COMPILER_COUNT 2 67#else 68#define CI_COMPILER_COUNT 1 69#endif // COMPILER2 70 71#endif // no compilers 72 73 74// string type aliases used only in this file 75typedef const char* ccstr; 76typedef const char* ccstrlist; // represents string arguments which accumulate 77 78enum FlagValueOrigin { 79 DEFAULT = 0, 80 COMMAND_LINE = 1, 81 ENVIRON_VAR = 2, 82 CONFIG_FILE = 3, 83 MANAGEMENT = 4, 84 ERGONOMIC = 5, 85 ATTACH_ON_DEMAND = 6, 86 INTERNAL = 99 87}; 88 89struct Flag { 90 const char *type; 91 const char *name; 92 void* addr; 93 const char *kind; 94 FlagValueOrigin origin; 95 96 // points to all Flags static array 97 static Flag *flags; 98 99 // number of flags 100 static size_t numFlags; 101 102 static Flag* find_flag(char* name, size_t length); 103 104 bool is_bool() const { return strcmp(type, "bool") == 0; } 105 bool get_bool() const { return *((bool*) addr); } 106 void set_bool(bool value) { *((bool*) addr) = value; } 107 108 bool is_intx() const { return strcmp(type, "intx") == 0; } 109 intx get_intx() const { return *((intx*) addr); } 110 void set_intx(intx value) { *((intx*) addr) = value; } 111 112 bool is_uintx() const { return strcmp(type, "uintx") == 0; } 113 uintx get_uintx() const { return *((uintx*) addr); } 114 void set_uintx(uintx value) { *((uintx*) addr) = value; } 115 116 bool is_double() const { return strcmp(type, "double") == 0; } 117 double get_double() const { return *((double*) addr); } 118 void set_double(double value) { *((double*) addr) = value; } 119 120 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 121 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 122 ccstr get_ccstr() const { return *((ccstr*) addr); } 123 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 124 125 bool is_unlocker() const; 126 bool is_unlocked() const; 127 bool is_writeable() const; 128 bool is_external() const; 129 130 void print_on(outputStream* st); 131 void print_as_flag(outputStream* st); 132}; 133 134// debug flags control various aspects of the VM and are global accessible 135 136// use FlagSetting to temporarily change some debug flag 137// e.g. FlagSetting fs(DebugThisAndThat, true); 138// restored to previous value upon leaving scope 139class FlagSetting { 140 bool val; 141 bool* flag; 142 public: 143 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 144 ~FlagSetting() { *flag = val; } 145}; 146 147 148class CounterSetting { 149 intx* counter; 150 public: 151 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 152 ~CounterSetting() { (*counter)--; } 153}; 154 155 156class IntFlagSetting { 157 intx val; 158 intx* flag; 159 public: 160 IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } 161 ~IntFlagSetting() { *flag = val; } 162}; 163 164 165class DoubleFlagSetting { 166 double val; 167 double* flag; 168 public: 169 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 170 ~DoubleFlagSetting() { *flag = val; } 171}; 172 173 174class CommandLineFlags { 175 public: 176 static bool boolAt(char* name, size_t len, bool* value); 177 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 178 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 179 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 180 181 static bool intxAt(char* name, size_t len, intx* value); 182 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 183 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 184 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 185 186 static bool uintxAt(char* name, size_t len, uintx* value); 187 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 188 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 189 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 190 191 static bool doubleAt(char* name, size_t len, double* value); 192 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 193 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 194 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 195 196 static bool ccstrAt(char* name, size_t len, ccstr* value); 197 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 198 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 199 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 200 201 // Returns false if name is not a command line flag. 202 static bool wasSetOnCmdline(const char* name, bool* value); 203 static void printSetFlags(); 204 205 static void printFlags() PRODUCT_RETURN; 206 207 static void verify() PRODUCT_RETURN; 208}; 209 210// use this for flags that are true by default in the debug version but 211// false in the optimized version, and vice versa 212#ifdef ASSERT 213#define trueInDebug true 214#define falseInDebug false 215#else 216#define trueInDebug false 217#define falseInDebug true 218#endif 219 220// use this for flags that are true per default in the product build 221// but false in development builds, and vice versa 222#ifdef PRODUCT 223#define trueInProduct true 224#define falseInProduct false 225#else 226#define trueInProduct false 227#define falseInProduct true 228#endif 229 230// use this for flags that are true per default in the tiered build 231// but false in non-tiered builds, and vice versa 232#ifdef TIERED 233#define trueInTiered true 234#define falseInTiered false 235#else 236#define trueInTiered false 237#define falseInTiered true 238#endif 239 240// develop flags are settable / visible only during development and are constant in the PRODUCT version 241// product flags are always settable / visible 242// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 243 244// A flag must be declared with one of the following types: 245// bool, intx, uintx, ccstr. 246// The type "ccstr" is an alias for "const char*" and is used 247// only in this file, because the macrology requires single-token type names. 248 249// Note: Diagnostic options not meant for VM tuning or for product modes. 250// They are to be used for VM quality assurance or field diagnosis 251// of VM bugs. They are hidden so that users will not be encouraged to 252// try them as if they were VM ordinary execution options. However, they 253// are available in the product version of the VM. Under instruction 254// from support engineers, VM customers can turn them on to collect 255// diagnostic information about VM problems. To use a VM diagnostic 256// option, you must first specify +UnlockDiagnosticVMOptions. 257// (This master switch also affects the behavior of -Xprintflags.) 258// 259// experimental flags are in support of features that are not 260// part of the officially supported product, but are available 261// for experimenting with. They could, for example, be performance 262// features that may not have undergone full or rigorous QA, but which may 263// help performance in some cases and released for experimentation 264// by the community of users and developers. This flag also allows one to 265// be able to build a fully supported product that nonetheless also 266// ships with some unsupported, lightly tested, experimental features. 267// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 268// UnlockExperimentalVMOptions flag, which allows the control and 269// modification of the experimental flags. 270// 271// manageable flags are writeable external product flags. 272// They are dynamically writeable through the JDK management interface 273// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 274// These flags are external exported interface (see CCC). The list of 275// manageable flags can be queried programmatically through the management 276// interface. 277// 278// A flag can be made as "manageable" only if 279// - the flag is defined in a CCC as an external exported interface. 280// - the VM implementation supports dynamic setting of the flag. 281// This implies that the VM must *always* query the flag variable 282// and not reuse state related to the flag state at any given time. 283// - you want the flag to be queried programmatically by the customers. 284// 285// product_rw flags are writeable internal product flags. 286// They are like "manageable" flags but for internal/private use. 287// The list of product_rw flags are internal/private flags which 288// may be changed/removed in a future release. It can be set 289// through the management interface to get/set value 290// when the name of flag is supplied. 291// 292// A flag can be made as "product_rw" only if 293// - the VM implementation supports dynamic setting of the flag. 294// This implies that the VM must *always* query the flag variable 295// and not reuse state related to the flag state at any given time. 296// 297// Note that when there is a need to support develop flags to be writeable, 298// it can be done in the same way as product_rw. 299 300#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 301 \ 302 lp64_product(bool, UseCompressedOops, false, \ 303 "Use 32-bit object references in 64-bit VM. " \ 304 "lp64_product means flag is always constant in 32 bit VM") \ 305 \ 306 lp64_product(bool, CheckCompressedOops, trueInDebug, \ 307 "generate checks in encoding/decoding code") \ 308 \ 309 product(bool, UseImplicitNullCheckForNarrowOop, true, \ 310 "generate implicit null check in indexed addressing mode.") \ 311 \ 312 /* UseMembar is theoretically a temp flag used for memory barrier \ 313 * removal testing. It was supposed to be removed before FCS but has \ 314 * been re-added (see 6401008) */ \ 315 product(bool, UseMembar, false, \ 316 "(Unstable) Issues membars on thread state transitions") \ 317 \ 318 product(bool, PrintCommandLineFlags, false, \ 319 "Prints flags that appeared on the command line") \ 320 \ 321 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 322 "Enable normal processing of flags relating to field diagnostics")\ 323 \ 324 experimental(bool, UnlockExperimentalVMOptions, false, \ 325 "Enable normal processing of flags relating to experimental features")\ 326 \ 327 product(bool, JavaMonitorsInStackTrace, true, \ 328 "Print info. about Java monitor locks when the stacks are dumped")\ 329 \ 330 product_pd(bool, UseLargePages, \ 331 "Use large page memory") \ 332 \ 333 develop(bool, TracePageSizes, false, \ 334 "Trace page size selection and usage.") \ 335 \ 336 product(bool, UseNUMA, false, \ 337 "Use NUMA if available") \ 338 \ 339 product(intx, NUMAChunkResizeWeight, 20, \ 340 "Percentage (0-100) used to weight the current sample when " \ 341 "computing exponentially decaying average for " \ 342 "AdaptiveNUMAChunkSizing") \ 343 \ 344 product(intx, NUMASpaceResizeRate, 1*G, \ 345 "Do not reallocate more that this amount per collection") \ 346 \ 347 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 348 "Enable adaptive chunk sizing for NUMA") \ 349 \ 350 product(bool, NUMAStats, false, \ 351 "Print NUMA stats in detailed heap information") \ 352 \ 353 product(intx, NUMAPageScanRate, 256, \ 354 "Maximum number of pages to include in the page scan procedure") \ 355 \ 356 product_pd(bool, NeedsDeoptSuspend, \ 357 "True for register window machines (sparc/ia64)") \ 358 \ 359 product(intx, UseSSE, 99, \ 360 "Highest supported SSE instructions set on x86/x64") \ 361 \ 362 product(uintx, LargePageSizeInBytes, 0, \ 363 "Large page size (0 to let VM choose the page size") \ 364 \ 365 product(uintx, LargePageHeapSizeThreshold, 128*M, \ 366 "Use large pages if max heap is at least this big") \ 367 \ 368 product(bool, ForceTimeHighResolution, false, \ 369 "Using high time resolution(For Win32 only)") \ 370 \ 371 develop(bool, TraceItables, false, \ 372 "Trace initialization and use of itables") \ 373 \ 374 develop(bool, TracePcPatching, false, \ 375 "Trace usage of frame::patch_pc") \ 376 \ 377 develop(bool, TraceJumps, false, \ 378 "Trace assembly jumps in thread ring buffer") \ 379 \ 380 develop(bool, TraceRelocator, false, \ 381 "Trace the bytecode relocator") \ 382 \ 383 develop(bool, TraceLongCompiles, false, \ 384 "Print out every time compilation is longer than " \ 385 "a given threashold") \ 386 \ 387 develop(bool, SafepointALot, false, \ 388 "Generates a lot of safepoints. Works with " \ 389 "GuaranteedSafepointInterval") \ 390 \ 391 product_pd(bool, BackgroundCompilation, \ 392 "A thread requesting compilation is not blocked during " \ 393 "compilation") \ 394 \ 395 product(bool, PrintVMQWaitTime, false, \ 396 "Prints out the waiting time in VM operation queue") \ 397 \ 398 develop(bool, BailoutToInterpreterForThrows, false, \ 399 "Compiled methods which throws/catches exceptions will be " \ 400 "deopt and intp.") \ 401 \ 402 develop(bool, NoYieldsInMicrolock, false, \ 403 "Disable yields in microlock") \ 404 \ 405 develop(bool, TraceOopMapGeneration, false, \ 406 "Shows oopmap generation") \ 407 \ 408 product(bool, MethodFlushing, true, \ 409 "Reclamation of zombie and not-entrant methods") \ 410 \ 411 develop(bool, VerifyStack, false, \ 412 "Verify stack of each thread when it is entering a runtime call") \ 413 \ 414 develop(bool, ForceUnreachable, false, \ 415 "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \ 416 \ 417 notproduct(bool, StressDerivedPointers, false, \ 418 "Force scavenge when a derived pointers is detected on stack " \ 419 "after rtm call") \ 420 \ 421 develop(bool, TraceDerivedPointers, false, \ 422 "Trace traversal of derived pointers on stack") \ 423 \ 424 notproduct(bool, TraceCodeBlobStacks, false, \ 425 "Trace stack-walk of codeblobs") \ 426 \ 427 product(bool, PrintJNIResolving, false, \ 428 "Used to implement -v:jni") \ 429 \ 430 notproduct(bool, PrintRewrites, false, \ 431 "Print methods that are being rewritten") \ 432 \ 433 product(bool, UseInlineCaches, true, \ 434 "Use Inline Caches for virtual calls ") \ 435 \ 436 develop(bool, InlineArrayCopy, true, \ 437 "inline arraycopy native that is known to be part of " \ 438 "base library DLL") \ 439 \ 440 develop(bool, InlineObjectHash, true, \ 441 "inline Object::hashCode() native that is known to be part " \ 442 "of base library DLL") \ 443 \ 444 develop(bool, InlineObjectCopy, true, \ 445 "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ 446 \ 447 develop(bool, InlineNatives, true, \ 448 "inline natives that are known to be part of base library DLL") \ 449 \ 450 develop(bool, InlineMathNatives, true, \ 451 "inline SinD, CosD, etc.") \ 452 \ 453 develop(bool, InlineClassNatives, true, \ 454 "inline Class.isInstance, etc") \ 455 \ 456 develop(bool, InlineAtomicLong, true, \ 457 "inline sun.misc.AtomicLong") \ 458 \ 459 develop(bool, InlineThreadNatives, true, \ 460 "inline Thread.currentThread, etc") \ 461 \ 462 develop(bool, InlineReflectionGetCallerClass, true, \ 463 "inline sun.reflect.Reflection.getCallerClass(), known to be part "\ 464 "of base library DLL") \ 465 \ 466 develop(bool, InlineUnsafeOps, true, \ 467 "inline memory ops (native methods) from sun.misc.Unsafe") \ 468 \ 469 develop(bool, ConvertCmpD2CmpF, true, \ 470 "Convert cmpD to cmpF when one input is constant in float range") \ 471 \ 472 develop(bool, ConvertFloat2IntClipping, true, \ 473 "Convert float2int clipping idiom to integer clipping") \ 474 \ 475 develop(bool, SpecialStringCompareTo, true, \ 476 "special version of string compareTo") \ 477 \ 478 develop(bool, SpecialStringIndexOf, true, \ 479 "special version of string indexOf") \ 480 \ 481 product(bool, SpecialArraysEquals, false, \ 482 "special version of Arrays.equals(char[],char[])") \ 483 \ 484 develop(bool, TraceCallFixup, false, \ 485 "traces all call fixups") \ 486 \ 487 develop(bool, DeoptimizeALot, false, \ 488 "deoptimize at every exit from the runtime system") \ 489 \ 490 develop(ccstrlist, DeoptimizeOnlyAt, "", \ 491 "a comma separated list of bcis to deoptimize at") \ 492 \ 493 product(bool, DeoptimizeRandom, false, \ 494 "deoptimize random frames on random exit from the runtime system")\ 495 \ 496 notproduct(bool, ZombieALot, false, \ 497 "creates zombies (non-entrant) at exit from the runt. system") \ 498 \ 499 notproduct(bool, WalkStackALot, false, \ 500 "trace stack (no print) at every exit from the runtime system") \ 501 \ 502 develop(bool, Debugging, false, \ 503 "set when executing debug methods in debug.ccp " \ 504 "(to prevent triggering assertions)") \ 505 \ 506 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 507 "Enable strict checks that safepoints cannot happen for threads " \ 508 "that used No_Safepoint_Verifier") \ 509 \ 510 notproduct(bool, VerifyLastFrame, false, \ 511 "Verify oops on last frame on entry to VM") \ 512 \ 513 develop(bool, TraceHandleAllocation, false, \ 514 "Prints out warnings when suspicious many handles are allocated") \ 515 \ 516 product(bool, UseCompilerSafepoints, true, \ 517 "Stop at safepoints in compiled code") \ 518 \ 519 product(bool, UseSplitVerifier, true, \ 520 "use split verifier with StackMapTable attributes") \ 521 \ 522 product(bool, FailOverToOldVerifier, true, \ 523 "fail over to old verifier when split verifier fails") \ 524 \ 525 develop(bool, ShowSafepointMsgs, false, \ 526 "Show msg. about safepoint synch.") \ 527 \ 528 product(bool, SafepointTimeout, false, \ 529 "Time out and warn or fail after SafepointTimeoutDelay " \ 530 "milliseconds if failed to reach safepoint") \ 531 \ 532 develop(bool, DieOnSafepointTimeout, false, \ 533 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 534 \ 535 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 536 /* typically, at most a few retries are needed */ \ 537 product(intx, SuspendRetryCount, 50, \ 538 "Maximum retry count for an external suspend request") \ 539 \ 540 product(intx, SuspendRetryDelay, 5, \ 541 "Milliseconds to delay per retry (* current_retry_count)") \ 542 \ 543 product(bool, AssertOnSuspendWaitFailure, false, \ 544 "Assert/Guarantee on external suspend wait failure") \ 545 \ 546 product(bool, TraceSuspendWaitFailures, false, \ 547 "Trace external suspend wait failures") \ 548 \ 549 product(bool, MaxFDLimit, true, \ 550 "Bump the number of file descriptors to max in solaris.") \ 551 \ 552 notproduct(bool, LogEvents, trueInDebug, \ 553 "Enable Event log") \ 554 \ 555 product(bool, BytecodeVerificationRemote, true, \ 556 "Enables the Java bytecode verifier for remote classes") \ 557 \ 558 product(bool, BytecodeVerificationLocal, false, \ 559 "Enables the Java bytecode verifier for local classes") \ 560 \ 561 develop(bool, ForceFloatExceptions, trueInDebug, \ 562 "Force exceptions on FP stack under/overflow") \ 563 \ 564 develop(bool, SoftMatchFailure, trueInProduct, \ 565 "If the DFA fails to match a node, print a message and bail out") \ 566 \ 567 develop(bool, VerifyStackAtCalls, false, \ 568 "Verify that the stack pointer is unchanged after calls") \ 569 \ 570 develop(bool, TraceJavaAssertions, false, \ 571 "Trace java language assertions") \ 572 \ 573 notproduct(bool, CheckAssertionStatusDirectives, false, \ 574 "temporary - see javaClasses.cpp") \ 575 \ 576 notproduct(bool, PrintMallocFree, false, \ 577 "Trace calls to C heap malloc/free allocation") \ 578 \ 579 notproduct(bool, PrintOopAddress, false, \ 580 "Always print the location of the oop") \ 581 \ 582 notproduct(bool, VerifyCodeCacheOften, false, \ 583 "Verify compiled-code cache often") \ 584 \ 585 develop(bool, ZapDeadCompiledLocals, false, \ 586 "Zap dead locals in compiler frames") \ 587 \ 588 notproduct(bool, ZapDeadLocalsOld, false, \ 589 "Zap dead locals (old version, zaps all frames when " \ 590 "entering the VM") \ 591 \ 592 notproduct(bool, CheckOopishValues, false, \ 593 "Warn if value contains oop ( requires ZapDeadLocals)") \ 594 \ 595 develop(bool, UseMallocOnly, false, \ 596 "use only malloc/free for allocation (no resource area/arena)") \ 597 \ 598 develop(bool, PrintMalloc, false, \ 599 "print all malloc/free calls") \ 600 \ 601 develop(bool, ZapResourceArea, trueInDebug, \ 602 "Zap freed resource/arena space with 0xABABABAB") \ 603 \ 604 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 605 "Zap freed VM handle space with 0xBCBCBCBC") \ 606 \ 607 develop(bool, ZapJNIHandleArea, trueInDebug, \ 608 "Zap freed JNI handle space with 0xFEFEFEFE") \ 609 \ 610 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 611 "Zap unused heap space with 0xBAADBABE") \ 612 \ 613 develop(bool, TraceZapUnusedHeapArea, false, \ 614 "Trace zapping of unused heap space") \ 615 \ 616 develop(bool, CheckZapUnusedHeapArea, false, \ 617 "Check zapping of unused heap space") \ 618 \ 619 develop(bool, PrintVMMessages, true, \ 620 "Print vm messages on console") \ 621 \ 622 product(bool, PrintGCApplicationConcurrentTime, false, \ 623 "Print the time the application has been running") \ 624 \ 625 product(bool, PrintGCApplicationStoppedTime, false, \ 626 "Print the time the application has been stopped") \ 627 \ 628 develop(bool, Verbose, false, \ 629 "Prints additional debugging information from other modes") \ 630 \ 631 develop(bool, PrintMiscellaneous, false, \ 632 "Prints uncategorized debugging information (requires +Verbose)") \ 633 \ 634 develop(bool, WizardMode, false, \ 635 "Prints much more debugging information") \ 636 \ 637 product(bool, ShowMessageBoxOnError, false, \ 638 "Keep process alive on VM fatal error") \ 639 \ 640 product_pd(bool, UseOSErrorReporting, \ 641 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 642 \ 643 product(bool, SuppressFatalErrorMessage, false, \ 644 "Do NO Fatal Error report [Avoid deadlock]") \ 645 \ 646 product(ccstrlist, OnError, "", \ 647 "Run user-defined commands on fatal error; see VMError.cpp " \ 648 "for examples") \ 649 \ 650 product(ccstrlist, OnOutOfMemoryError, "", \ 651 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 652 \ 653 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 654 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 655 \ 656 manageable(ccstr, HeapDumpPath, NULL, \ 657 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 658 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 659 "in the working directory)") \ 660 \ 661 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 662 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 663 "when the heap usage is larger than this") \ 664 \ 665 develop(uintx, HeapDumpSegmentSize, 1*G, \ 666 "Approximate segment size when generating a segmented heap dump") \ 667 \ 668 develop(bool, BreakAtWarning, false, \ 669 "Execute breakpoint upon encountering VM warning") \ 670 \ 671 product_pd(bool, UseVectoredExceptions, \ 672 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ 673 \ 674 develop(bool, TraceVMOperation, false, \ 675 "Trace vm operations") \ 676 \ 677 develop(bool, UseFakeTimers, false, \ 678 "Tells whether the VM should use system time or a fake timer") \ 679 \ 680 diagnostic(bool, LogCompilation, false, \ 681 "Log compilation activity in detail to hotspot.log or LogFile") \ 682 \ 683 product(bool, PrintCompilation, false, \ 684 "Print compilations") \ 685 \ 686 diagnostic(bool, TraceNMethodInstalls, false, \ 687 "Trace nmethod intallation") \ 688 \ 689 diagnostic(bool, TraceOSRBreakpoint, false, \ 690 "Trace OSR Breakpoint ") \ 691 \ 692 diagnostic(bool, TraceCompileTriggered, false, \ 693 "Trace compile triggered") \ 694 \ 695 diagnostic(bool, TraceTriggers, false, \ 696 "Trace triggers") \ 697 \ 698 product(bool, AlwaysRestoreFPU, false, \ 699 "Restore the FPU control word after every JNI call (expensive)") \ 700 \ 701 notproduct(bool, PrintCompilation2, false, \ 702 "Print additional statistics per compilation") \ 703 \ 704 diagnostic(bool, PrintAdapterHandlers, false, \ 705 "Print code generated for i2c/c2i adapters") \ 706 \ 707 diagnostic(bool, PrintAssembly, false, \ 708 "Print assembly code (using external disassembler.so)") \ 709 \ 710 diagnostic(ccstr, PrintAssemblyOptions, false, \ 711 "Options string passed to disassembler.so") \ 712 \ 713 diagnostic(bool, PrintNMethods, false, \ 714 "Print assembly code for nmethods when generated") \ 715 \ 716 diagnostic(bool, PrintNativeNMethods, false, \ 717 "Print assembly code for native nmethods when generated") \ 718 \ 719 develop(bool, PrintDebugInfo, false, \ 720 "Print debug information for all nmethods when generated") \ 721 \ 722 develop(bool, PrintRelocations, false, \ 723 "Print relocation information for all nmethods when generated") \ 724 \ 725 develop(bool, PrintDependencies, false, \ 726 "Print dependency information for all nmethods when generated") \ 727 \ 728 develop(bool, PrintExceptionHandlers, false, \ 729 "Print exception handler tables for all nmethods when generated") \ 730 \ 731 develop(bool, InterceptOSException, false, \ 732 "Starts debugger when an implicit OS (e.g., NULL) " \ 733 "exception happens") \ 734 \ 735 notproduct(bool, PrintCodeCache, false, \ 736 "Print the compiled_code cache when exiting") \ 737 \ 738 develop(bool, PrintCodeCache2, false, \ 739 "Print detailed info on the compiled_code cache when exiting") \ 740 \ 741 diagnostic(bool, PrintStubCode, false, \ 742 "Print generated stub code") \ 743 \ 744 product(bool, StackTraceInThrowable, true, \ 745 "Collect backtrace in throwable when exception happens") \ 746 \ 747 product(bool, OmitStackTraceInFastThrow, true, \ 748 "Omit backtraces for some 'hot' exceptions in optimized code") \ 749 \ 750 product(bool, ProfilerPrintByteCodeStatistics, false, \ 751 "Prints byte code statictics when dumping profiler output") \ 752 \ 753 product(bool, ProfilerRecordPC, false, \ 754 "Collects tick for each 16 byte interval of compiled code") \ 755 \ 756 product(bool, ProfileVM, false, \ 757 "Profiles ticks that fall within VM (either in the VM Thread " \ 758 "or VM code called through stubs)") \ 759 \ 760 product(bool, ProfileIntervals, false, \ 761 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 762 \ 763 notproduct(bool, ProfilerCheckIntervals, false, \ 764 "Collect and print info on spacing of profiler ticks") \ 765 \ 766 develop(bool, PrintJVMWarnings, false, \ 767 "Prints warnings for unimplemented JVM functions") \ 768 \ 769 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 770 "Prints warnings for stalled SpinLocks") \ 771 \ 772 develop(bool, InitializeJavaLangSystem, true, \ 773 "Initialize java.lang.System - turn off for individual " \ 774 "method debugging") \ 775 \ 776 develop(bool, InitializeJavaLangString, true, \ 777 "Initialize java.lang.String - turn off for individual " \ 778 "method debugging") \ 779 \ 780 develop(bool, InitializeJavaLangExceptionsErrors, true, \ 781 "Initialize various error and exception classes - turn off for " \ 782 "individual method debugging") \ 783 \ 784 product(bool, RegisterFinalizersAtInit, true, \ 785 "Register finalizable objects at end of Object.<init> or " \ 786 "after allocation.") \ 787 \ 788 develop(bool, RegisterReferences, true, \ 789 "Tells whether the VM should register soft/weak/final/phantom " \ 790 "references") \ 791 \ 792 develop(bool, IgnoreRewrites, false, \ 793 "Supress rewrites of bytecodes in the oopmap generator. " \ 794 "This is unsafe!") \ 795 \ 796 develop(bool, PrintCodeCacheExtension, false, \ 797 "Print extension of code cache") \ 798 \ 799 develop(bool, UsePrivilegedStack, true, \ 800 "Enable the security JVM functions") \ 801 \ 802 develop(bool, IEEEPrecision, true, \ 803 "Enables IEEE precision (for INTEL only)") \ 804 \ 805 develop(bool, ProtectionDomainVerification, true, \ 806 "Verifies protection domain before resolution in system " \ 807 "dictionary") \ 808 \ 809 product(bool, ClassUnloading, true, \ 810 "Do unloading of classes") \ 811 \ 812 diagnostic(bool, LinkWellKnownClasses, true, \ 813 "Resolve a well known class as soon as its name is seen") \ 814 \ 815 develop(bool, DisableStartThread, false, \ 816 "Disable starting of additional Java threads " \ 817 "(for debugging only)") \ 818 \ 819 develop(bool, MemProfiling, false, \ 820 "Write memory usage profiling to log file") \ 821 \ 822 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 823 "Prints the system dictionary at exit") \ 824 \ 825 diagnostic(bool, UnsyncloadClass, false, \ 826 "Unstable: VM calls loadClass unsynchronized. Custom classloader "\ 827 "must call VM synchronized for findClass & defineClass") \ 828 \ 829 product_pd(bool, DontYieldALot, \ 830 "Throw away obvious excess yield calls (for SOLARIS only)") \ 831 \ 832 product_pd(bool, ConvertSleepToYield, \ 833 "Converts sleep(0) to thread yield " \ 834 "(may be off for SOLARIS to improve GUI)") \ 835 \ 836 product(bool, ConvertYieldToSleep, false, \ 837 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 838 "behavior (SOLARIS only)") \ 839 \ 840 product(bool, UseBoundThreads, true, \ 841 "Bind user level threads to kernel threads (for SOLARIS only)") \ 842 \ 843 develop(bool, UseDetachedThreads, true, \ 844 "Use detached threads that are recycled upon termination " \ 845 "(for SOLARIS only)") \ 846 \ 847 product(bool, UseLWPSynchronization, true, \ 848 "Use LWP-based instead of libthread-based synchronization " \ 849 "(SPARC only)") \ 850 \ 851 product(ccstr, SyncKnobs, "", \ 852 "(Unstable) Various monitor synchronization tunables") \ 853 \ 854 product(intx, EmitSync, 0, \ 855 "(Unsafe,Unstable) " \ 856 " Controls emission of inline sync fast-path code") \ 857 \ 858 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ 859 \ 860 product(intx, Atomics, 0, \ 861 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ 862 \ 863 product(intx, FenceInstruction, 0, \ 864 "(Unsafe,Unstable) Experimental") \ 865 \ 866 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 867 \ 868 product(intx, SyncVerbose, 0, "(Unstable)" ) \ 869 \ 870 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 871 \ 872 product(intx, hashCode, 0, \ 873 "(Unstable) select hashCode generation algorithm" ) \ 874 \ 875 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 876 "(Unstable, Linux-specific)" \ 877 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 878 \ 879 product(bool, FilterSpuriousWakeups , true, \ 880 "Prevent spurious or premature wakeups from object.wait" \ 881 "(Solaris only)") \ 882 \ 883 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 884 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 885 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 886 \ 887 develop(bool, UsePthreads, false, \ 888 "Use pthread-based instead of libthread-based synchronization " \ 889 "(SPARC only)") \ 890 \ 891 product(bool, AdjustConcurrency, false, \ 892 "call thr_setconcurrency at thread create time to avoid " \ 893 "LWP starvation on MP systems (For Solaris Only)") \ 894 \ 895 develop(bool, UpdateHotSpotCompilerFileOnError, true, \ 896 "Should the system attempt to update the compiler file when " \ 897 "an error occurs?") \ 898 \ 899 product(bool, ReduceSignalUsage, false, \ 900 "Reduce the use of OS signals in Java and/or the VM") \ 901 \ 902 notproduct(bool, ValidateMarkSweep, false, \ 903 "Do extra validation during MarkSweep collection") \ 904 \ 905 notproduct(bool, RecordMarkSweepCompaction, false, \ 906 "Enable GC-to-GC recording and querying of compaction during " \ 907 "MarkSweep") \ 908 \ 909 develop_pd(bool, ShareVtableStubs, \ 910 "Share vtable stubs (smaller code but worse branch prediction") \ 911 \ 912 develop(bool, LoadLineNumberTables, true, \ 913 "Tells whether the class file parser loads line number tables") \ 914 \ 915 develop(bool, LoadLocalVariableTables, true, \ 916 "Tells whether the class file parser loads local variable tables")\ 917 \ 918 develop(bool, LoadLocalVariableTypeTables, true, \ 919 "Tells whether the class file parser loads local variable type tables")\ 920 \ 921 product(bool, AllowUserSignalHandlers, false, \ 922 "Do not complain if the application installs signal handlers " \ 923 "(Solaris & Linux only)") \ 924 \ 925 product(bool, UseSignalChaining, true, \ 926 "Use signal-chaining to invoke signal handlers installed " \ 927 "by the application (Solaris & Linux only)") \ 928 \ 929 product(bool, UseAltSigs, false, \ 930 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 931 "internal signals. (Solaris only)") \ 932 \ 933 product(bool, UseSpinning, false, \ 934 "Use spinning in monitor inflation and before entry") \ 935 \ 936 product(bool, PreSpinYield, false, \ 937 "Yield before inner spinning loop") \ 938 \ 939 product(bool, PostSpinYield, true, \ 940 "Yield after inner spinning loop") \ 941 \ 942 product(bool, AllowJNIEnvProxy, false, \ 943 "Allow JNIEnv proxies for jdbx") \ 944 \ 945 product(bool, JNIDetachReleasesMonitors, true, \ 946 "JNI DetachCurrentThread releases monitors owned by thread") \ 947 \ 948 product(bool, RestoreMXCSROnJNICalls, false, \ 949 "Restore MXCSR when returning from JNI calls") \ 950 \ 951 product(bool, CheckJNICalls, false, \ 952 "Verify all arguments to JNI calls") \ 953 \ 954 product(bool, UseFastJNIAccessors, true, \ 955 "Use optimized versions of Get<Primitive>Field") \ 956 \ 957 product(bool, EagerXrunInit, false, \ 958 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 959 " but not all -Xrun libraries may support the state of the VM at this time") \ 960 \ 961 product(bool, PreserveAllAnnotations, false, \ 962 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 963 \ 964 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 965 "Number of OutOfMemoryErrors preallocated with backtrace") \ 966 \ 967 product(bool, LazyBootClassLoader, true, \ 968 "Enable/disable lazy opening of boot class path entries") \ 969 \ 970 diagnostic(bool, UseIncDec, true, \ 971 "Use INC, DEC instructions on x86") \ 972 \ 973 product(bool, UseNewLongLShift, false, \ 974 "Use optimized bitwise shift left") \ 975 \ 976 product(bool, UseStoreImmI16, true, \ 977 "Use store immediate 16-bits value instruction on x86") \ 978 \ 979 product(bool, UseAddressNop, false, \ 980 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 981 \ 982 product(bool, UseXmmLoadAndClearUpper, true, \ 983 "Load low part of XMM register and clear upper part") \ 984 \ 985 product(bool, UseXmmRegToRegMoveAll, false, \ 986 "Copy all XMM register bits when moving value between registers") \ 987 \ 988 product(bool, UseXmmI2D, false, \ 989 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 990 \ 991 product(bool, UseXmmI2F, false, \ 992 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 993 \ 994 product(intx, FieldsAllocationStyle, 1, \ 995 "0 - type based with oops first, 1 - with oops last") \ 996 \ 997 product(bool, CompactFields, true, \ 998 "Allocate nonstatic fields in gaps between previous fields") \ 999 \ 1000 notproduct(bool, PrintCompactFieldsSavings, false, \ 1001 "Print how many words were saved with CompactFields") \ 1002 \ 1003 product(bool, UseBiasedLocking, true, \ 1004 "Enable biased locking in JVM") \ 1005 \ 1006 product(intx, BiasedLockingStartupDelay, 4000, \ 1007 "Number of milliseconds to wait before enabling biased locking") \ 1008 \ 1009 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1010 "Print statistics of biased locking in JVM") \ 1011 \ 1012 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1013 "Threshold of number of revocations per type to try to " \ 1014 "rebias all objects in the heap of that type") \ 1015 \ 1016 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1017 "Threshold of number of revocations per type to permanently " \ 1018 "revoke biases of all objects in the heap of that type") \ 1019 \ 1020 product(intx, BiasedLockingDecayTime, 25000, \ 1021 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1022 "type after previous bulk rebias") \ 1023 \ 1024 /* tracing */ \ 1025 \ 1026 notproduct(bool, TraceRuntimeCalls, false, \ 1027 "Trace run-time calls") \ 1028 \ 1029 develop(bool, TraceJNICalls, false, \ 1030 "Trace JNI calls") \ 1031 \ 1032 notproduct(bool, TraceJVMCalls, false, \ 1033 "Trace JVM calls") \ 1034 \ 1035 product(ccstr, TraceJVMTI, "", \ 1036 "Trace flags for JVMTI functions and events") \ 1037 \ 1038 /* This option can change an EMCP method into an obsolete method. */ \ 1039 /* This can affect tests that except specific methods to be EMCP. */ \ 1040 /* This option should be used with caution. */ \ 1041 product(bool, StressLdcRewrite, false, \ 1042 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1043 \ 1044 product(intx, TraceRedefineClasses, 0, \ 1045 "Trace level for JVMTI RedefineClasses") \ 1046 \ 1047 /* change to false by default sometime after Mustang */ \ 1048 product(bool, VerifyMergedCPBytecodes, true, \ 1049 "Verify bytecodes after RedefineClasses constant pool merging") \ 1050 \ 1051 develop(bool, TraceJNIHandleAllocation, false, \ 1052 "Trace allocation/deallocation of JNI handle blocks") \ 1053 \ 1054 develop(bool, TraceThreadEvents, false, \ 1055 "Trace all thread events") \ 1056 \ 1057 develop(bool, TraceBytecodes, false, \ 1058 "Trace bytecode execution") \ 1059 \ 1060 develop(bool, TraceClassInitialization, false, \ 1061 "Trace class initialization") \ 1062 \ 1063 develop(bool, TraceExceptions, false, \ 1064 "Trace exceptions") \ 1065 \ 1066 develop(bool, TraceICs, false, \ 1067 "Trace inline cache changes") \ 1068 \ 1069 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1070 "Trace method invocation counter overflow") \ 1071 \ 1072 develop(bool, TraceInlineCacheClearing, false, \ 1073 "Trace clearing of inline caches in nmethods") \ 1074 \ 1075 develop(bool, TraceDependencies, false, \ 1076 "Trace dependencies") \ 1077 \ 1078 develop(bool, VerifyDependencies, trueInDebug, \ 1079 "Exercise and verify the compilation dependency mechanism") \ 1080 \ 1081 develop(bool, TraceNewOopMapGeneration, false, \ 1082 "Trace OopMapGeneration") \ 1083 \ 1084 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1085 "Trace OopMapGeneration: print detailed cell states") \ 1086 \ 1087 develop(bool, TimeOopMap, false, \ 1088 "Time calls to GenerateOopMap::compute_map() in sum") \ 1089 \ 1090 develop(bool, TimeOopMap2, false, \ 1091 "Time calls to GenerateOopMap::compute_map() individually") \ 1092 \ 1093 develop(bool, TraceMonitorMismatch, false, \ 1094 "Trace monitor matching failures during OopMapGeneration") \ 1095 \ 1096 develop(bool, TraceOopMapRewrites, false, \ 1097 "Trace rewritting of method oops during oop map generation") \ 1098 \ 1099 develop(bool, TraceSafepoint, false, \ 1100 "Trace safepoint operations") \ 1101 \ 1102 develop(bool, TraceICBuffer, false, \ 1103 "Trace usage of IC buffer") \ 1104 \ 1105 develop(bool, TraceCompiledIC, false, \ 1106 "Trace changes of compiled IC") \ 1107 \ 1108 notproduct(bool, TraceZapDeadLocals, false, \ 1109 "Trace zapping dead locals") \ 1110 \ 1111 develop(bool, TraceStartupTime, false, \ 1112 "Trace setup time") \ 1113 \ 1114 develop(bool, TraceHPI, false, \ 1115 "Trace Host Porting Interface (HPI)") \ 1116 \ 1117 product(ccstr, HPILibPath, NULL, \ 1118 "Specify alternate path to HPI library") \ 1119 \ 1120 develop(bool, TraceProtectionDomainVerification, false, \ 1121 "Trace protection domain verifcation") \ 1122 \ 1123 develop(bool, TraceClearedExceptions, false, \ 1124 "Prints when an exception is forcibly cleared") \ 1125 \ 1126 product(bool, TraceClassResolution, false, \ 1127 "Trace all constant pool resolutions (for debugging)") \ 1128 \ 1129 product(bool, TraceBiasedLocking, false, \ 1130 "Trace biased locking in JVM") \ 1131 \ 1132 product(bool, TraceMonitorInflation, false, \ 1133 "Trace monitor inflation in JVM") \ 1134 \ 1135 /* assembler */ \ 1136 product(bool, Use486InstrsOnly, false, \ 1137 "Use 80486 Compliant instruction subset") \ 1138 \ 1139 /* gc */ \ 1140 \ 1141 product(bool, UseSerialGC, false, \ 1142 "Use the serial garbage collector") \ 1143 \ 1144 experimental(bool, UseG1GC, false, \ 1145 "Use the Garbage-First garbage collector") \ 1146 \ 1147 product(bool, UseParallelGC, false, \ 1148 "Use the Parallel Scavenge garbage collector") \ 1149 \ 1150 product(bool, UseParallelOldGC, false, \ 1151 "Use the Parallel Old garbage collector") \ 1152 \ 1153 product(bool, UseParallelOldGCCompacting, true, \ 1154 "In the Parallel Old garbage collector use parallel compaction") \ 1155 \ 1156 product(bool, UseParallelDensePrefixUpdate, true, \ 1157 "In the Parallel Old garbage collector use parallel dense" \ 1158 " prefix update") \ 1159 \ 1160 develop(bool, UseParallelOldGCChunkPointerCalc, true, \ 1161 "In the Parallel Old garbage collector use chucks to calculate" \ 1162 " new object locations") \ 1163 \ 1164 product(uintx, HeapMaximumCompactionInterval, 20, \ 1165 "How often should we maximally compact the heap (not allowing " \ 1166 "any dead space)") \ 1167 \ 1168 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1169 "The collection count for the first maximum compaction") \ 1170 \ 1171 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1172 "In the Parallel Old garbage collector maximum compaction for " \ 1173 "a system GC") \ 1174 \ 1175 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1176 "The mean used by the par compact dead wood" \ 1177 "limiter (a number between 0-100).") \ 1178 \ 1179 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1180 "The standard deviation used by the par compact dead wood" \ 1181 "limiter (a number between 0-100).") \ 1182 \ 1183 product(bool, UseParallelOldGCDensePrefix, true, \ 1184 "Use a dense prefix with the Parallel Old garbage collector") \ 1185 \ 1186 product(uintx, ParallelGCThreads, 0, \ 1187 "Number of parallel threads parallel gc will use") \ 1188 \ 1189 product(uintx, ParallelCMSThreads, 0, \ 1190 "Max number of threads CMS will use for concurrent work") \ 1191 \ 1192 develop(bool, VerifyParallelOldWithMarkSweep, false, \ 1193 "Use the MarkSweep code to verify phases of Parallel Old") \ 1194 \ 1195 develop(uintx, VerifyParallelOldWithMarkSweepInterval, 1, \ 1196 "Interval at which the MarkSweep code is used to verify " \ 1197 "phases of Parallel Old") \ 1198 \ 1199 develop(bool, ParallelOldMTUnsafeMarkBitMap, false, \ 1200 "Use the Parallel Old MT unsafe in marking the bitmap") \ 1201 \ 1202 develop(bool, ParallelOldMTUnsafeUpdateLiveData, false, \ 1203 "Use the Parallel Old MT unsafe in update of live size") \ 1204 \ 1205 develop(bool, TraceChunkTasksQueuing, false, \ 1206 "Trace the queuing of the chunk tasks") \ 1207 \ 1208 product(uintx, ParallelMarkingThreads, 0, \ 1209 "Number of marking threads concurrent gc will use") \ 1210 \ 1211 product(uintx, YoungPLABSize, 4096, \ 1212 "Size of young gen promotion labs (in HeapWords)") \ 1213 \ 1214 product(uintx, OldPLABSize, 1024, \ 1215 "Size of old gen promotion labs (in HeapWords)") \ 1216 \ 1217 product(uintx, GCTaskTimeStampEntries, 200, \ 1218 "Number of time stamp entries per gc worker thread") \ 1219 \ 1220 product(bool, AlwaysTenure, false, \ 1221 "Always tenure objects in eden. (ParallelGC only)") \ 1222 \ 1223 product(bool, NeverTenure, false, \ 1224 "Never tenure objects in eden, May tenure on overflow" \ 1225 " (ParallelGC only)") \ 1226 \ 1227 product(bool, ScavengeBeforeFullGC, true, \ 1228 "Scavenge youngest generation before each full GC," \ 1229 " used with UseParallelGC") \ 1230 \ 1231 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1232 "Allow scavenges to occur when to_space contains objects.") \ 1233 \ 1234 product(bool, UseConcMarkSweepGC, false, \ 1235 "Use Concurrent Mark-Sweep GC in the old generation") \ 1236 \ 1237 product(bool, ExplicitGCInvokesConcurrent, false, \ 1238 "A System.gc() request invokes a concurrent collection;" \ 1239 " (effective only when UseConcMarkSweepGC)") \ 1240 \ 1241 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1242 "A System.gc() request invokes a concurrent collection and" \ 1243 " also unloads classes during such a concurrent gc cycle " \ 1244 " (effective only when UseConcMarkSweepGC)") \ 1245 \ 1246 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1247 "Use Adaptive Free Lists in the CMS generation") \ 1248 \ 1249 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1250 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1251 \ 1252 develop(bool, RotateCMSCollectionTypes, false, \ 1253 "Rotate the CMS collections among concurrent and STW") \ 1254 \ 1255 product(bool, UseCMSBestFit, true, \ 1256 "Use CMS best fit allocation strategy") \ 1257 \ 1258 product(bool, UseCMSCollectionPassing, true, \ 1259 "Use passing of collection from background to foreground") \ 1260 \ 1261 product(bool, UseParNewGC, false, \ 1262 "Use parallel threads in the new generation.") \ 1263 \ 1264 product(bool, ParallelGCVerbose, false, \ 1265 "Verbose output for parallel GC.") \ 1266 \ 1267 product(intx, ParallelGCBufferWastePct, 10, \ 1268 "wasted fraction of parallel allocation buffer.") \ 1269 \ 1270 product(bool, ParallelGCRetainPLAB, true, \ 1271 "Retain parallel allocation buffers across scavenges.") \ 1272 \ 1273 product(intx, TargetPLABWastePct, 10, \ 1274 "target wasted space in last buffer as pct of overall allocation")\ 1275 \ 1276 product(uintx, PLABWeight, 75, \ 1277 "Percentage (0-100) used to weight the current sample when" \ 1278 "computing exponentially decaying average for ResizePLAB.") \ 1279 \ 1280 product(bool, ResizePLAB, true, \ 1281 "Dynamically resize (survivor space) promotion labs") \ 1282 \ 1283 product(bool, PrintPLAB, false, \ 1284 "Print (survivor space) promotion labs sizing decisions") \ 1285 \ 1286 product(intx, ParGCArrayScanChunk, 50, \ 1287 "Scan a subset and push remainder, if array is bigger than this") \ 1288 \ 1289 product(intx, ParGCDesiredObjsFromOverflowList, 20, \ 1290 "The desired number of objects to claim from the overflow list") \ 1291 \ 1292 product(uintx, CMSParPromoteBlocksToClaim, 50, \ 1293 "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1294 "parallel GC.") \ 1295 \ 1296 product(bool, AlwaysPreTouch, false, \ 1297 "It forces all freshly committed pages to be pre-touched.") \ 1298 \ 1299 product(bool, CMSUseOldDefaults, false, \ 1300 "A flag temporarily introduced to allow reverting to some older" \ 1301 "default settings; older as of 6.0 ") \ 1302 \ 1303 product(intx, CMSYoungGenPerWorker, 16*M, \ 1304 "The amount of young gen chosen by default per GC worker " \ 1305 "thread available ") \ 1306 \ 1307 product(bool, GCOverheadReporting, false, \ 1308 "Enables the GC overhead reporting facility") \ 1309 \ 1310 product(intx, GCOverheadReportingPeriodMS, 100, \ 1311 "Reporting period for conc GC overhead reporting, in ms ") \ 1312 \ 1313 product(bool, CMSIncrementalMode, false, \ 1314 "Whether CMS GC should operate in \"incremental\" mode") \ 1315 \ 1316 product(uintx, CMSIncrementalDutyCycle, 10, \ 1317 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1318 "CMSIncrementalPacing is enabled, then this is just the initial" \ 1319 "value") \ 1320 \ 1321 product(bool, CMSIncrementalPacing, true, \ 1322 "Whether the CMS incremental mode duty cycle should be " \ 1323 "automatically adjusted") \ 1324 \ 1325 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1326 "Lower bound on the duty cycle when CMSIncrementalPacing is" \ 1327 "enabled (a percentage, 0-100).") \ 1328 \ 1329 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1330 "Percentage (0-100) used to add conservatism when computing the" \ 1331 "duty cycle.") \ 1332 \ 1333 product(uintx, CMSIncrementalOffset, 0, \ 1334 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1335 "is shifted to the right within the period between young GCs") \ 1336 \ 1337 product(uintx, CMSExpAvgFactor, 25, \ 1338 "Percentage (0-100) used to weight the current sample when" \ 1339 "computing exponential averages for CMS statistics.") \ 1340 \ 1341 product(uintx, CMS_FLSWeight, 50, \ 1342 "Percentage (0-100) used to weight the current sample when" \ 1343 "computing exponentially decating averages for CMS FLS statistics.") \ 1344 \ 1345 product(uintx, CMS_FLSPadding, 2, \ 1346 "The multiple of deviation from mean to use for buffering" \ 1347 "against volatility in free list demand.") \ 1348 \ 1349 product(uintx, FLSCoalescePolicy, 2, \ 1350 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1351 \ 1352 product(uintx, CMS_SweepWeight, 50, \ 1353 "Percentage (0-100) used to weight the current sample when" \ 1354 "computing exponentially decaying average for inter-sweep duration.") \ 1355 \ 1356 product(uintx, CMS_SweepPadding, 2, \ 1357 "The multiple of deviation from mean to use for buffering" \ 1358 "against volatility in inter-sweep duration.") \ 1359 \ 1360 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1361 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1362 " duration exceeds this threhold in milliseconds") \ 1363 \ 1364 develop(bool, CMSTraceIncrementalMode, false, \ 1365 "Trace CMS incremental mode") \ 1366 \ 1367 develop(bool, CMSTraceIncrementalPacing, false, \ 1368 "Trace CMS incremental mode pacing computation") \ 1369 \ 1370 develop(bool, CMSTraceThreadState, false, \ 1371 "Trace the CMS thread state (enable the trace_state() method)") \ 1372 \ 1373 product(bool, CMSClassUnloadingEnabled, false, \ 1374 "Whether class unloading enabled when using CMS GC") \ 1375 \ 1376 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1377 "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1378 " for which classes may not be unloaded") \ 1379 \ 1380 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1381 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1382 \ 1383 product(bool, UseCMSCompactAtFullCollection, true, \ 1384 "Use mark sweep compact at full collections") \ 1385 \ 1386 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1387 "Number of CMS full collection done before compaction if > 0") \ 1388 \ 1389 develop(intx, CMSDictionaryChoice, 0, \ 1390 "Use BinaryTreeDictionary as default in the CMS generation") \ 1391 \ 1392 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1393 "Replenish and indexed free list with this number of chunks") \ 1394 \ 1395 product(bool, CMSLoopWarn, false, \ 1396 "Warn in case of excessive CMS looping") \ 1397 \ 1398 develop(bool, CMSOverflowEarlyRestoration, false, \ 1399 "Whether preserved marks should be restored early") \ 1400 \ 1401 product(uintx, CMSMarkStackSize, 32*K, \ 1402 "Size of CMS marking stack") \ 1403 \ 1404 product(uintx, CMSMarkStackSizeMax, 4*M, \ 1405 "Max size of CMS marking stack") \ 1406 \ 1407 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1408 "Whether we should simulate frequent marking stack / work queue" \ 1409 " overflow") \ 1410 \ 1411 notproduct(intx, CMSMarkStackOverflowInterval, 1000, \ 1412 "A per-thread `interval' counter that determines how frequently" \ 1413 " we simulate overflow; a smaller number increases frequency") \ 1414 \ 1415 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1416 "(Temporary, subject to experimentation)" \ 1417 "Maximum number of abortable preclean iterations, if > 0") \ 1418 \ 1419 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1420 "(Temporary, subject to experimentation)" \ 1421 "Maximum time in abortable preclean in ms") \ 1422 \ 1423 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1424 "(Temporary, subject to experimentation)" \ 1425 "Nominal minimum work per abortable preclean iteration") \ 1426 \ 1427 product(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1428 "(Temporary, subject to experimentation)" \ 1429 " Time that we sleep between iterations when not given" \ 1430 " enough work per iteration") \ 1431 \ 1432 product(uintx, CMSRescanMultiple, 32, \ 1433 "Size (in cards) of CMS parallel rescan task") \ 1434 \ 1435 product(uintx, CMSConcMarkMultiple, 32, \ 1436 "Size (in cards) of CMS concurrent MT marking task") \ 1437 \ 1438 product(uintx, CMSRevisitStackSize, 1*M, \ 1439 "Size of CMS KlassKlass revisit stack") \ 1440 \ 1441 product(bool, CMSAbortSemantics, false, \ 1442 "Whether abort-on-overflow semantics is implemented") \ 1443 \ 1444 product(bool, CMSParallelRemarkEnabled, true, \ 1445 "Whether parallel remark enabled (only if ParNewGC)") \ 1446 \ 1447 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1448 "Whether parallel remark of survivor space" \ 1449 " enabled (effective only if CMSParallelRemarkEnabled)") \ 1450 \ 1451 product(bool, CMSPLABRecordAlways, true, \ 1452 "Whether to always record survivor space PLAB bdries" \ 1453 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1454 \ 1455 product(bool, CMSConcurrentMTEnabled, true, \ 1456 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1457 \ 1458 product(bool, CMSPermGenPrecleaningEnabled, true, \ 1459 "Whether concurrent precleaning enabled in perm gen" \ 1460 " (effective only when CMSPrecleaningEnabled is true)") \ 1461 \ 1462 product(bool, CMSPrecleaningEnabled, true, \ 1463 "Whether concurrent precleaning enabled") \ 1464 \ 1465 product(uintx, CMSPrecleanIter, 3, \ 1466 "Maximum number of precleaning iteration passes") \ 1467 \ 1468 product(uintx, CMSPrecleanNumerator, 2, \ 1469 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1470 " ratio") \ 1471 \ 1472 product(uintx, CMSPrecleanDenominator, 3, \ 1473 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1474 " ratio") \ 1475 \ 1476 product(bool, CMSPrecleanRefLists1, false, \ 1477 "Preclean ref lists during (initial) preclean phase") \ 1478 \ 1479 product(bool, CMSPrecleanRefLists2, false, \ 1480 "Preclean ref lists during abortable preclean phase") \ 1481 \ 1482 product(bool, CMSPrecleanSurvivors1, false, \ 1483 "Preclean survivors during (initial) preclean phase") \ 1484 \ 1485 product(bool, CMSPrecleanSurvivors2, true, \ 1486 "Preclean survivors during abortable preclean phase") \ 1487 \ 1488 product(uintx, CMSPrecleanThreshold, 1000, \ 1489 "Don't re-iterate if #dirty cards less than this") \ 1490 \ 1491 product(bool, CMSCleanOnEnter, true, \ 1492 "Clean-on-enter optimization for reducing number of dirty cards") \ 1493 \ 1494 product(uintx, CMSRemarkVerifyVariant, 1, \ 1495 "Choose variant (1,2) of verification following remark") \ 1496 \ 1497 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1498 "If Eden used is below this value, don't try to schedule remark") \ 1499 \ 1500 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1501 "The Eden occupancy % at which to try and schedule remark pause") \ 1502 \ 1503 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1504 "Start sampling Eden top at least before yg occupancy reaches" \ 1505 " 1/<ratio> of the size at which we plan to schedule remark") \ 1506 \ 1507 product(uintx, CMSSamplingGrain, 16*K, \ 1508 "The minimum distance between eden samples for CMS (see above)") \ 1509 \ 1510 product(bool, CMSScavengeBeforeRemark, false, \ 1511 "Attempt scavenge before the CMS remark step") \ 1512 \ 1513 develop(bool, CMSTraceSweeper, false, \ 1514 "Trace some actions of the CMS sweeper") \ 1515 \ 1516 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1517 "Don't drain below this size per parallel worker/thief") \ 1518 \ 1519 product(intx, CMSWaitDuration, 2000, \ 1520 "Time in milliseconds that CMS thread waits for young GC") \ 1521 \ 1522 product(bool, CMSYield, true, \ 1523 "Yield between steps of concurrent mark & sweep") \ 1524 \ 1525 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1526 "Bitmap operations should process at most this many bits" \ 1527 "between yields") \ 1528 \ 1529 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1530 "Verify that all refs across the FLS boundary " \ 1531 " are to valid objects") \ 1532 \ 1533 diagnostic(bool, FLSVerifyLists, false, \ 1534 "Do lots of (expensive) FreeListSpace verification") \ 1535 \ 1536 diagnostic(bool, FLSVerifyIndexTable, false, \ 1537 "Do lots of (expensive) FLS index table verification") \ 1538 \ 1539 develop(bool, FLSVerifyDictionary, false, \ 1540 "Do lots of (expensive) FLS dictionary verification") \ 1541 \ 1542 develop(bool, VerifyBlockOffsetArray, false, \ 1543 "Do (expensive!) block offset array verification") \ 1544 \ 1545 product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \ 1546 "Maintain _unallocated_block in BlockOffsetArray" \ 1547 " (currently applicable only to CMS collector)") \ 1548 \ 1549 develop(bool, TraceCMSState, false, \ 1550 "Trace the state of the CMS collection") \ 1551 \ 1552 product(intx, RefDiscoveryPolicy, 0, \ 1553 "Whether reference-based(0) or referent-based(1)") \ 1554 \ 1555 product(bool, ParallelRefProcEnabled, false, \ 1556 "Enable parallel reference processing whenever possible") \ 1557 \ 1558 product(bool, ParallelRefProcBalancingEnabled, true, \ 1559 "Enable balancing of reference processing queues") \ 1560 \ 1561 product(intx, CMSTriggerRatio, 80, \ 1562 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1563 " allocated before a CMS collection cycle commences") \ 1564 \ 1565 product(intx, CMSTriggerPermRatio, 80, \ 1566 "Percentage of MinHeapFreeRatio in the CMS perm generation that" \ 1567 " is allocated before a CMS collection cycle commences, that " \ 1568 " also collects the perm generation") \ 1569 \ 1570 product(uintx, CMSBootstrapOccupancy, 50, \ 1571 "Percentage CMS generation occupancy at which to " \ 1572 " initiate CMS collection for bootstrapping collection stats") \ 1573 \ 1574 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1575 "Percentage CMS generation occupancy to start a CMS collection " \ 1576 " cycle (A negative value means that CMSTriggerRatio is used)") \ 1577 \ 1578 product(intx, CMSInitiatingPermOccupancyFraction, -1, \ 1579 "Percentage CMS perm generation occupancy to start a CMScollection"\ 1580 " cycle (A negative value means that CMSTriggerPermRatio is used)")\ 1581 \ 1582 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1583 "Only use occupancy as a crierion for starting a CMS collection") \ 1584 \ 1585 product(intx, CMSIsTooFullPercentage, 98, \ 1586 "An absolute ceiling above which CMS will always consider the" \ 1587 " perm gen ripe for collection") \ 1588 \ 1589 develop(bool, CMSTestInFreeList, false, \ 1590 "Check if the coalesced range is already in the " \ 1591 "free lists as claimed.") \ 1592 \ 1593 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1594 "Check that all the garbage collected was returned to the " \ 1595 "free lists.") \ 1596 \ 1597 notproduct(bool, ScavengeALot, false, \ 1598 "Force scavenge at every Nth exit from the runtime system " \ 1599 "(N=ScavengeALotInterval)") \ 1600 \ 1601 develop(bool, FullGCALot, false, \ 1602 "Force full gc at every Nth exit from the runtime system " \ 1603 "(N=FullGCALotInterval)") \ 1604 \ 1605 notproduct(bool, GCALotAtAllSafepoints, false, \ 1606 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1607 \ 1608 product(bool, HandlePromotionFailure, true, \ 1609 "The youngest generation collection does not require" \ 1610 " a guarantee of full promotion of all live objects.") \ 1611 \ 1612 notproduct(bool, PromotionFailureALot, false, \ 1613 "Use promotion failure handling on every youngest generation " \ 1614 "collection") \ 1615 \ 1616 develop(uintx, PromotionFailureALotCount, 1000, \ 1617 "Number of promotion failures occurring at ParGCAllocBuffer" \ 1618 "refill attempts (ParNew) or promotion attempts " \ 1619 "(other young collectors) ") \ 1620 \ 1621 develop(uintx, PromotionFailureALotInterval, 5, \ 1622 "Total collections between promotion failures alot") \ 1623 \ 1624 develop(intx, WorkStealingSleepMillis, 1, \ 1625 "Sleep time when sleep is used for yields") \ 1626 \ 1627 develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \ 1628 "Number of yields before a sleep is done during workstealing") \ 1629 \ 1630 product(uintx, PreserveMarkStackSize, 40, \ 1631 "Size for stack used in promotion failure handling") \ 1632 \ 1633 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1634 \ 1635 product_pd(bool, ResizeTLAB, \ 1636 "Dynamically resize tlab size for threads") \ 1637 \ 1638 product(bool, ZeroTLAB, false, \ 1639 "Zero out the newly created TLAB") \ 1640 \ 1641 product(bool, FastTLABRefill, true, \ 1642 "Use fast TLAB refill code") \ 1643 \ 1644 product(bool, PrintTLAB, false, \ 1645 "Print various TLAB related information") \ 1646 \ 1647 product(bool, TLABStats, true, \ 1648 "Print various TLAB related information") \ 1649 \ 1650 product_pd(bool, NeverActAsServerClassMachine, \ 1651 "Never act like a server-class machine") \ 1652 \ 1653 product(bool, AlwaysActAsServerClassMachine, false, \ 1654 "Always act like a server-class machine") \ 1655 \ 1656 product_pd(uintx, DefaultMaxRAM, \ 1657 "Maximum real memory size for setting server class heap size") \ 1658 \ 1659 product(uintx, DefaultMaxRAMFraction, 4, \ 1660 "Fraction (1/n) of real memory used for server class max heap") \ 1661 \ 1662 product(uintx, DefaultInitialRAMFraction, 64, \ 1663 "Fraction (1/n) of real memory used for server class initial heap") \ 1664 \ 1665 product(bool, UseAutoGCSelectPolicy, false, \ 1666 "Use automatic collection selection policy") \ 1667 \ 1668 product(uintx, AutoGCSelectPauseMillis, 5000, \ 1669 "Automatic GC selection pause threshhold in ms") \ 1670 \ 1671 product(bool, UseAdaptiveSizePolicy, true, \ 1672 "Use adaptive generation sizing policies") \ 1673 \ 1674 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 1675 "Use adaptive survivor sizing policies") \ 1676 \ 1677 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 1678 "Use adaptive young-old sizing policies at minor collections") \ 1679 \ 1680 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 1681 "Use adaptive young-old sizing policies at major collections") \ 1682 \ 1683 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 1684 "Use statistics from System.GC for adaptive size policy") \ 1685 \ 1686 product(bool, UseAdaptiveGCBoundary, false, \ 1687 "Allow young-old boundary to move") \ 1688 \ 1689 develop(bool, TraceAdaptiveGCBoundary, false, \ 1690 "Trace young-old boundary moves") \ 1691 \ 1692 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 1693 "Resize the virtual spaces of the young or old generations") \ 1694 \ 1695 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 1696 "Policy for changeing generation size for throughput goals") \ 1697 \ 1698 product(uintx, AdaptiveSizePausePolicy, 0, \ 1699 "Policy for changing generation size for pause goals") \ 1700 \ 1701 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 1702 "Adjust tenured generation to achive a minor pause goal") \ 1703 \ 1704 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 1705 "Adjust young generation to achive a major pause goal") \ 1706 \ 1707 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 1708 "Number of steps where heuristics is used before data is used") \ 1709 \ 1710 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 1711 "Number of collections before the adaptive sizing is started") \ 1712 \ 1713 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 1714 "Collecton interval for printing information, zero => never") \ 1715 \ 1716 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 1717 "Use adaptive minimum footprint as a goal") \ 1718 \ 1719 product(uintx, AdaptiveSizePolicyWeight, 10, \ 1720 "Weight given to exponential resizing, between 0 and 100") \ 1721 \ 1722 product(uintx, AdaptiveTimeWeight, 25, \ 1723 "Weight given to time in adaptive policy, between 0 and 100") \ 1724 \ 1725 product(uintx, PausePadding, 1, \ 1726 "How much buffer to keep for pause time") \ 1727 \ 1728 product(uintx, PromotedPadding, 3, \ 1729 "How much buffer to keep for promotion failure") \ 1730 \ 1731 product(uintx, SurvivorPadding, 3, \ 1732 "How much buffer to keep for survivor overflow") \ 1733 \ 1734 product(uintx, AdaptivePermSizeWeight, 20, \ 1735 "Weight for perm gen exponential resizing, between 0 and 100") \ 1736 \ 1737 product(uintx, PermGenPadding, 3, \ 1738 "How much buffer to keep for perm gen sizing") \ 1739 \ 1740 product(uintx, ThresholdTolerance, 10, \ 1741 "Allowed collection cost difference between generations") \ 1742 \ 1743 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 1744 "If collection costs are within margin, reduce both by full delta") \ 1745 \ 1746 product(uintx, YoungGenerationSizeIncrement, 20, \ 1747 "Adaptive size percentage change in young generation") \ 1748 \ 1749 product(uintx, YoungGenerationSizeSupplement, 80, \ 1750 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 1751 \ 1752 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 1753 "Decay factor to YoungedGenerationSizeSupplement") \ 1754 \ 1755 product(uintx, TenuredGenerationSizeIncrement, 20, \ 1756 "Adaptive size percentage change in tenured generation") \ 1757 \ 1758 product(uintx, TenuredGenerationSizeSupplement, 80, \ 1759 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 1760 \ 1761 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 1762 "Decay factor to TenuredGenerationSizeIncrement") \ 1763 \ 1764 product(uintx, MaxGCPauseMillis, max_uintx, \ 1765 "Adaptive size policy maximum GC pause time goal in msec") \ 1766 \ 1767 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 1768 "Adaptive size policy maximum GC minor pause time goal in msec") \ 1769 \ 1770 product(uintx, GCTimeRatio, 99, \ 1771 "Adaptive size policy application time to GC time ratio") \ 1772 \ 1773 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 1774 "Adaptive size scale down factor for shrinking") \ 1775 \ 1776 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 1777 "Adaptive size decays the major cost for long major intervals") \ 1778 \ 1779 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 1780 "Time scale over which major costs decay") \ 1781 \ 1782 product(uintx, MinSurvivorRatio, 3, \ 1783 "Minimum ratio of young generation/survivor space size") \ 1784 \ 1785 product(uintx, InitialSurvivorRatio, 8, \ 1786 "Initial ratio of eden/survivor space size") \ 1787 \ 1788 product(uintx, BaseFootPrintEstimate, 256*M, \ 1789 "Estimate of footprint other than Java Heap") \ 1790 \ 1791 product(bool, UseGCOverheadLimit, true, \ 1792 "Use policy to limit of proportion of time spent in GC " \ 1793 "before an OutOfMemory error is thrown") \ 1794 \ 1795 product(uintx, GCTimeLimit, 98, \ 1796 "Limit of proportion of time spent in GC before an OutOfMemory" \ 1797 "error is thrown (used with GCHeapFreeLimit)") \ 1798 \ 1799 product(uintx, GCHeapFreeLimit, 2, \ 1800 "Minimum percentage of free space after a full GC before an " \ 1801 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 1802 \ 1803 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 1804 "Number of consecutive collections before gc time limit fires") \ 1805 \ 1806 product(bool, PrintAdaptiveSizePolicy, false, \ 1807 "Print information about AdaptiveSizePolicy") \ 1808 \ 1809 product(intx, PrefetchCopyIntervalInBytes, -1, \ 1810 "How far ahead to prefetch destination area (<= 0 means off)") \ 1811 \ 1812 product(intx, PrefetchScanIntervalInBytes, -1, \ 1813 "How far ahead to prefetch scan area (<= 0 means off)") \ 1814 \ 1815 product(intx, PrefetchFieldsAhead, -1, \ 1816 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 1817 \ 1818 develop(bool, UsePrefetchQueue, true, \ 1819 "Use the prefetch queue during PS promotion") \ 1820 \ 1821 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 1822 "Verify system before exiting") \ 1823 \ 1824 diagnostic(bool, VerifyBeforeGC, false, \ 1825 "Verify memory system before GC") \ 1826 \ 1827 diagnostic(bool, VerifyAfterGC, false, \ 1828 "Verify memory system after GC") \ 1829 \ 1830 diagnostic(bool, VerifyDuringGC, false, \ 1831 "Verify memory system during GC (between phases)") \ 1832 \ 1833 diagnostic(bool, VerifyRememberedSets, false, \ 1834 "Verify GC remembered sets") \ 1835 \ 1836 diagnostic(bool, VerifyObjectStartArray, true, \ 1837 "Verify GC object start array if verify before/after") \ 1838 \ 1839 product(bool, DisableExplicitGC, false, \ 1840 "Tells whether calling System.gc() does a full GC") \ 1841 \ 1842 notproduct(bool, CheckMemoryInitialization, false, \ 1843 "Checks memory initialization") \ 1844 \ 1845 product(bool, CollectGen0First, false, \ 1846 "Collect youngest generation before each full GC") \ 1847 \ 1848 diagnostic(bool, BindCMSThreadToCPU, false, \ 1849 "Bind CMS Thread to CPU if possible") \ 1850 \ 1851 diagnostic(uintx, CPUForCMSThread, 0, \ 1852 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 1853 \ 1854 product(bool, BindGCTaskThreadsToCPUs, false, \ 1855 "Bind GCTaskThreads to CPUs if possible") \ 1856 \ 1857 product(bool, UseGCTaskAffinity, false, \ 1858 "Use worker affinity when asking for GCTasks") \ 1859 \ 1860 product(uintx, ProcessDistributionStride, 4, \ 1861 "Stride through processors when distributing processes") \ 1862 \ 1863 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 1864 "number of times the coordinator GC thread will sleep while " \ 1865 "yielding before giving up and resuming GC") \ 1866 \ 1867 product(uintx, CMSYieldSleepCount, 0, \ 1868 "number of times a GC thread (minus the coordinator) " \ 1869 "will sleep while yielding before giving up and resuming GC") \ 1870 \ 1871 notproduct(bool, PrintFlagsFinal, false, \ 1872 "Print all command line flags after argument processing") \ 1873 \ 1874 /* gc tracing */ \ 1875 manageable(bool, PrintGC, false, \ 1876 "Print message at garbage collect") \ 1877 \ 1878 manageable(bool, PrintGCDetails, false, \ 1879 "Print more details at garbage collect") \ 1880 \ 1881 manageable(bool, PrintGCDateStamps, false, \ 1882 "Print date stamps at garbage collect") \ 1883 \ 1884 manageable(bool, PrintGCTimeStamps, false, \ 1885 "Print timestamps at garbage collect") \ 1886 \ 1887 product(bool, PrintGCTaskTimeStamps, false, \ 1888 "Print timestamps for individual gc worker thread tasks") \ 1889 \ 1890 develop(intx, ConcGCYieldTimeout, 0, \ 1891 "If non-zero, assert that GC threads yield within this # of ms.") \ 1892 \ 1893 notproduct(bool, TraceMarkSweep, false, \ 1894 "Trace mark sweep") \ 1895 \ 1896 product(bool, PrintReferenceGC, false, \ 1897 "Print times spent handling reference objects during GC " \ 1898 " (enabled only when PrintGCDetails)") \ 1899 \ 1900 develop(bool, TraceReferenceGC, false, \ 1901 "Trace handling of soft/weak/final/phantom references") \ 1902 \ 1903 develop(bool, TraceFinalizerRegistration, false, \ 1904 "Trace registration of final references") \ 1905 \ 1906 notproduct(bool, TraceScavenge, false, \ 1907 "Trace scavenge") \ 1908 \ 1909 product_rw(bool, TraceClassLoading, false, \ 1910 "Trace all classes loaded") \ 1911 \ 1912 product(bool, TraceClassLoadingPreorder, false, \ 1913 "Trace all classes loaded in order referenced (not loaded)") \ 1914 \ 1915 product_rw(bool, TraceClassUnloading, false, \ 1916 "Trace unloading of classes") \ 1917 \ 1918 product_rw(bool, TraceLoaderConstraints, false, \ 1919 "Trace loader constraints") \ 1920 \ 1921 product(bool, TraceGen0Time, false, \ 1922 "Trace accumulated time for Gen 0 collection") \ 1923 \ 1924 product(bool, TraceGen1Time, false, \ 1925 "Trace accumulated time for Gen 1 collection") \ 1926 \ 1927 product(bool, PrintTenuringDistribution, false, \ 1928 "Print tenuring age information") \ 1929 \ 1930 product_rw(bool, PrintHeapAtGC, false, \ 1931 "Print heap layout before and after each GC") \ 1932 \ 1933 product(bool, PrintHeapAtSIGBREAK, true, \ 1934 "Print heap layout in response to SIGBREAK") \ 1935 \ 1936 manageable(bool, PrintClassHistogram, false, \ 1937 "Print a histogram of class instances") \ 1938 \ 1939 develop(bool, TraceWorkGang, false, \ 1940 "Trace activities of work gangs") \ 1941 \ 1942 product(bool, TraceParallelOldGCTasks, false, \ 1943 "Trace multithreaded GC activity") \ 1944 \ 1945 develop(bool, TraceBlockOffsetTable, false, \ 1946 "Print BlockOffsetTable maps") \ 1947 \ 1948 develop(bool, TraceCardTableModRefBS, false, \ 1949 "Print CardTableModRefBS maps") \ 1950 \ 1951 develop(bool, TraceGCTaskManager, false, \ 1952 "Trace actions of the GC task manager") \ 1953 \ 1954 develop(bool, TraceGCTaskQueue, false, \ 1955 "Trace actions of the GC task queues") \ 1956 \ 1957 develop(bool, TraceGCTaskThread, false, \ 1958 "Trace actions of the GC task threads") \ 1959 \ 1960 product(bool, PrintParallelOldGCPhaseTimes, false, \ 1961 "Print the time taken by each parallel old gc phase." \ 1962 "PrintGCDetails must also be enabled.") \ 1963 \ 1964 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 1965 "Trace parallel old gc marking phase") \ 1966 \ 1967 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 1968 "Trace parallel old gc summary phase") \ 1969 \ 1970 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 1971 "Trace parallel old gc compaction phase") \ 1972 \ 1973 develop(bool, TraceParallelOldGCDensePrefix, false, \ 1974 "Trace parallel old gc dense prefix computation") \ 1975 \ 1976 develop(bool, IgnoreLibthreadGPFault, false, \ 1977 "Suppress workaround for libthread GP fault") \ 1978 \ 1979 product(bool, PrintJNIGCStalls, false, \ 1980 "Print diagnostic message when GC is stalled" \ 1981 "by JNI critical section") \ 1982 \ 1983 /* JVMTI heap profiling */ \ 1984 \ 1985 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 1986 "Trace JVMTI object tagging calls") \ 1987 \ 1988 diagnostic(bool, VerifyBeforeIteration, false, \ 1989 "Verify memory system before JVMTI iteration") \ 1990 \ 1991 /* compiler interface */ \ 1992 \ 1993 develop(bool, CIPrintCompilerName, false, \ 1994 "when CIPrint is active, print the name of the active compiler") \ 1995 \ 1996 develop(bool, CIPrintCompileQueue, false, \ 1997 "display the contents of the compile queue whenever a " \ 1998 "compilation is enqueued") \ 1999 \ 2000 develop(bool, CIPrintRequests, false, \ 2001 "display every request for compilation") \ 2002 \ 2003 product(bool, CITime, false, \ 2004 "collect timing information for compilation") \ 2005 \ 2006 develop(bool, CITimeEach, false, \ 2007 "display timing information after each successful compilation") \ 2008 \ 2009 develop(bool, CICountOSR, true, \ 2010 "use a separate counter when assigning ids to osr compilations") \ 2011 \ 2012 develop(bool, CICompileNatives, true, \ 2013 "compile native methods if supported by the compiler") \ 2014 \ 2015 develop_pd(bool, CICompileOSR, \ 2016 "compile on stack replacement methods if supported by the " \ 2017 "compiler") \ 2018 \ 2019 develop(bool, CIPrintMethodCodes, false, \ 2020 "print method bytecodes of the compiled code") \ 2021 \ 2022 develop(bool, CIPrintTypeFlow, false, \ 2023 "print the results of ciTypeFlow analysis") \ 2024 \ 2025 develop(bool, CITraceTypeFlow, false, \ 2026 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2027 \ 2028 develop(intx, CICloneLoopTestLimit, 100, \ 2029 "size limit for blocks heuristically cloned in ciTypeFlow") \ 2030 \ 2031 /* temp diagnostics */ \ 2032 \ 2033 diagnostic(bool, TraceRedundantCompiles, false, \ 2034 "Have compile broker print when a request already in the queue is"\ 2035 " requested again") \ 2036 \ 2037 diagnostic(bool, InitialCompileFast, false, \ 2038 "Initial compile at CompLevel_fast_compile") \ 2039 \ 2040 diagnostic(bool, InitialCompileReallyFast, false, \ 2041 "Initial compile at CompLevel_really_fast_compile (no profile)") \ 2042 \ 2043 diagnostic(bool, FullProfileOnReInterpret, true, \ 2044 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ 2045 \ 2046 /* compiler */ \ 2047 \ 2048 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2049 "Number of compiler threads to run") \ 2050 \ 2051 product(intx, CompilationPolicyChoice, 0, \ 2052 "which compilation policy (0/1)") \ 2053 \ 2054 develop(bool, UseStackBanging, true, \ 2055 "use stack banging for stack overflow checks (required for " \ 2056 "proper StackOverflow handling; disable only to measure cost " \ 2057 "of stackbanging)") \ 2058 \ 2059 develop(bool, Use24BitFPMode, true, \ 2060 "Set 24-bit FPU mode on a per-compile basis ") \ 2061 \ 2062 develop(bool, Use24BitFP, true, \ 2063 "use FP instructions that produce 24-bit precise results") \ 2064 \ 2065 develop(bool, UseStrictFP, true, \ 2066 "use strict fp if modifier strictfp is set") \ 2067 \ 2068 develop(bool, GenerateSynchronizationCode, true, \ 2069 "generate locking/unlocking code for synchronized methods and " \ 2070 "monitors") \ 2071 \ 2072 develop(bool, GenerateCompilerNullChecks, true, \ 2073 "Generate explicit null checks for loads/stores/calls") \ 2074 \ 2075 develop(bool, GenerateRangeChecks, true, \ 2076 "Generate range checks for array accesses") \ 2077 \ 2078 develop_pd(bool, ImplicitNullChecks, \ 2079 "generate code for implicit null checks") \ 2080 \ 2081 product(bool, PrintSafepointStatistics, false, \ 2082 "print statistics about safepoint synchronization") \ 2083 \ 2084 product(intx, PrintSafepointStatisticsCount, 300, \ 2085 "total number of safepoint statistics collected " \ 2086 "before printing them out") \ 2087 \ 2088 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2089 "print safepoint statistics only when safepoint takes" \ 2090 " more than PrintSafepointSatisticsTimeout in millis") \ 2091 \ 2092 develop(bool, InlineAccessors, true, \ 2093 "inline accessor methods (get/set)") \ 2094 \ 2095 product(bool, Inline, true, \ 2096 "enable inlining") \ 2097 \ 2098 product(bool, ClipInlining, true, \ 2099 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2100 \ 2101 develop(bool, UseCHA, true, \ 2102 "enable CHA") \ 2103 \ 2104 product(bool, UseTypeProfile, true, \ 2105 "Check interpreter profile for historically monomorphic calls") \ 2106 \ 2107 product(intx, TypeProfileMajorReceiverPercent, 90, \ 2108 "% of major receiver type to all profiled receivers") \ 2109 \ 2110 notproduct(bool, TimeCompiler, false, \ 2111 "time the compiler") \ 2112 \ 2113 notproduct(bool, TimeCompiler2, false, \ 2114 "detailed time the compiler (requires +TimeCompiler)") \ 2115 \ 2116 diagnostic(bool, PrintInlining, false, \ 2117 "prints inlining optimizations") \ 2118 \ 2119 diagnostic(bool, PrintIntrinsics, false, \ 2120 "prints attempted and successful inlining of intrinsics") \ 2121 \ 2122 diagnostic(ccstrlist, DisableIntrinsic, "", \ 2123 "do not expand intrinsics whose (internal) names appear here") \ 2124 \ 2125 develop(bool, StressReflectiveCode, false, \ 2126 "Use inexact types at allocations, etc., to test reflection") \ 2127 \ 2128 develop(bool, EagerInitialization, false, \ 2129 "Eagerly initialize classes if possible") \ 2130 \ 2131 product(bool, Tier1UpdateMethodData, trueInTiered, \ 2132 "Update methodDataOops in Tier1-generated code") \ 2133 \ 2134 develop(bool, TraceMethodReplacement, false, \ 2135 "Print when methods are replaced do to recompilation") \ 2136 \ 2137 develop(bool, PrintMethodFlushing, false, \ 2138 "print the nmethods being flushed") \ 2139 \ 2140 notproduct(bool, LogMultipleMutexLocking, false, \ 2141 "log locking and unlocking of mutexes (only if multiple locks " \ 2142 "are held)") \ 2143 \ 2144 develop(bool, UseRelocIndex, false, \ 2145 "use an index to speed random access to relocations") \ 2146 \ 2147 develop(bool, StressCodeBuffers, false, \ 2148 "Exercise code buffer expansion and other rare state changes") \ 2149 \ 2150 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2151 "Generate extra debugging info for non-safepoints in nmethods") \ 2152 \ 2153 diagnostic(bool, DebugInlinedCalls, true, \ 2154 "If false, restricts profiled locations to the root method only") \ 2155 \ 2156 product(bool, PrintVMOptions, trueInDebug, \ 2157 "print VM flag settings") \ 2158 \ 2159 diagnostic(bool, SerializeVMOutput, true, \ 2160 "Use a mutex to serialize output to tty and hotspot.log") \ 2161 \ 2162 diagnostic(bool, DisplayVMOutput, true, \ 2163 "Display all VM output on the tty, independently of LogVMOutput") \ 2164 \ 2165 diagnostic(bool, LogVMOutput, trueInDebug, \ 2166 "Save VM output to hotspot.log, or to LogFile") \ 2167 \ 2168 diagnostic(ccstr, LogFile, NULL, \ 2169 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2170 \ 2171 product(ccstr, ErrorFile, NULL, \ 2172 "If an error occurs, save the error data to this file " \ 2173 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2174 \ 2175 product(bool, DisplayVMOutputToStderr, false, \ 2176 "If DisplayVMOutput is true, display all VM output to stderr") \ 2177 \ 2178 product(bool, DisplayVMOutputToStdout, false, \ 2179 "If DisplayVMOutput is true, display all VM output to stdout") \ 2180 \ 2181 product(bool, UseHeavyMonitors, false, \ 2182 "use heavyweight instead of lightweight Java monitors") \ 2183 \ 2184 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2185 "print histogram of the symbol table") \ 2186 \ 2187 notproduct(bool, ExitVMOnVerifyError, false, \ 2188 "standard exit from VM if bytecode verify error " \ 2189 "(only in debug mode)") \ 2190 \ 2191 notproduct(ccstr, AbortVMOnException, NULL, \ 2192 "Call fatal if this exception is thrown. Example: " \ 2193 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2194 \ 2195 develop(bool, DebugVtables, false, \ 2196 "add debugging code to vtable dispatch") \ 2197 \ 2198 develop(bool, PrintVtables, false, \ 2199 "print vtables when printing klass") \ 2200 \ 2201 notproduct(bool, PrintVtableStats, false, \ 2202 "print vtables stats at end of run") \ 2203 \ 2204 develop(bool, TraceCreateZombies, false, \ 2205 "trace creation of zombie nmethods") \ 2206 \ 2207 notproduct(bool, IgnoreLockingAssertions, false, \ 2208 "disable locking assertions (for speed)") \ 2209 \ 2210 notproduct(bool, VerifyLoopOptimizations, false, \ 2211 "verify major loop optimizations") \ 2212 \ 2213 product(bool, RangeCheckElimination, true, \ 2214 "Split loop iterations to eliminate range checks") \ 2215 \ 2216 develop_pd(bool, UncommonNullCast, \ 2217 "track occurrences of null in casts; adjust compiler tactics") \ 2218 \ 2219 develop(bool, TypeProfileCasts, true, \ 2220 "treat casts like calls for purposes of type profiling") \ 2221 \ 2222 develop(bool, MonomorphicArrayCheck, true, \ 2223 "Uncommon-trap array store checks that require full type check") \ 2224 \ 2225 develop(bool, DelayCompilationDuringStartup, true, \ 2226 "Delay invoking the compiler until main application class is " \ 2227 "loaded") \ 2228 \ 2229 develop(bool, CompileTheWorld, false, \ 2230 "Compile all methods in all classes in bootstrap class path " \ 2231 "(stress test)") \ 2232 \ 2233 develop(bool, CompileTheWorldPreloadClasses, true, \ 2234 "Preload all classes used by a class before start loading") \ 2235 \ 2236 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \ 2237 "Compile all methods although class initializer failed") \ 2238 \ 2239 develop(bool, TraceIterativeGVN, false, \ 2240 "Print progress during Iterative Global Value Numbering") \ 2241 \ 2242 develop(bool, FillDelaySlots, true, \ 2243 "Fill delay slots (on SPARC only)") \ 2244 \ 2245 develop(bool, VerifyIterativeGVN, false, \ 2246 "Verify Def-Use modifications during sparse Iterative Global " \ 2247 "Value Numbering") \ 2248 \ 2249 notproduct(bool, TracePhaseCCP, false, \ 2250 "Print progress during Conditional Constant Propagation") \ 2251 \ 2252 develop(bool, TimeLivenessAnalysis, false, \ 2253 "Time computation of bytecode liveness analysis") \ 2254 \ 2255 develop(bool, TraceLivenessGen, false, \ 2256 "Trace the generation of liveness analysis information") \ 2257 \ 2258 notproduct(bool, TraceLivenessQuery, false, \ 2259 "Trace queries of liveness analysis information") \ 2260 \ 2261 notproduct(bool, CollectIndexSetStatistics, false, \ 2262 "Collect information about IndexSets") \ 2263 \ 2264 develop(bool, PrintDominators, false, \ 2265 "Print out dominator trees for GVN") \ 2266 \ 2267 develop(bool, UseLoopSafepoints, true, \ 2268 "Generate Safepoint nodes in every loop") \ 2269 \ 2270 notproduct(bool, TraceCISCSpill, false, \ 2271 "Trace allocators use of cisc spillable instructions") \ 2272 \ 2273 notproduct(bool, TraceSpilling, false, \ 2274 "Trace spilling") \ 2275 \ 2276 develop(bool, DeutschShiffmanExceptions, true, \ 2277 "Fast check to find exception handler for precisely typed " \ 2278 "exceptions") \ 2279 \ 2280 product(bool, SplitIfBlocks, true, \ 2281 "Clone compares and control flow through merge points to fold " \ 2282 "some branches") \ 2283 \ 2284 develop(intx, FastAllocateSizeLimit, 128*K, \ 2285 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2286 "Inline allocations larger than this in doublewords must go slow")\ 2287 \ 2288 product(bool, AggressiveOpts, false, \ 2289 "Enable aggressive optimizations - see arguments.cpp") \ 2290 \ 2291 product(bool, UseStringCache, false, \ 2292 "Enable String cache capabilities on String.java") \ 2293 \ 2294 /* statistics */ \ 2295 develop(bool, UseVTune, false, \ 2296 "enable support for Intel's VTune profiler") \ 2297 \ 2298 develop(bool, CountCompiledCalls, false, \ 2299 "counts method invocations") \ 2300 \ 2301 notproduct(bool, CountRuntimeCalls, false, \ 2302 "counts VM runtime calls") \ 2303 \ 2304 develop(bool, CountJNICalls, false, \ 2305 "counts jni method invocations") \ 2306 \ 2307 notproduct(bool, CountJVMCalls, false, \ 2308 "counts jvm method invocations") \ 2309 \ 2310 notproduct(bool, CountRemovableExceptions, false, \ 2311 "count exceptions that could be replaced by branches due to " \ 2312 "inlining") \ 2313 \ 2314 notproduct(bool, ICMissHistogram, false, \ 2315 "produce histogram of IC misses") \ 2316 \ 2317 notproduct(bool, PrintClassStatistics, false, \ 2318 "prints class statistics at end of run") \ 2319 \ 2320 notproduct(bool, PrintMethodStatistics, false, \ 2321 "prints method statistics at end of run") \ 2322 \ 2323 /* interpreter */ \ 2324 develop(bool, ClearInterpreterLocals, false, \ 2325 "Always clear local variables of interpreter activations upon " \ 2326 "entry") \ 2327 \ 2328 product_pd(bool, RewriteBytecodes, \ 2329 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2330 \ 2331 product_pd(bool, RewriteFrequentPairs, \ 2332 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2333 \ 2334 diagnostic(bool, PrintInterpreter, false, \ 2335 "Prints the generated interpreter code") \ 2336 \ 2337 product(bool, UseInterpreter, true, \ 2338 "Use interpreter for non-compiled methods") \ 2339 \ 2340 develop(bool, UseFastSignatureHandlers, true, \ 2341 "Use fast signature handlers for native calls") \ 2342 \ 2343 develop(bool, UseV8InstrsOnly, false, \ 2344 "Use SPARC-V8 Compliant instruction subset") \ 2345 \ 2346 product(bool, UseNiagaraInstrs, false, \ 2347 "Use Niagara-efficient instruction subset") \ 2348 \ 2349 develop(bool, UseCASForSwap, false, \ 2350 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 2351 \ 2352 product(bool, UseLoopCounter, true, \ 2353 "Increment invocation counter on backward branch") \ 2354 \ 2355 product(bool, UseFastEmptyMethods, true, \ 2356 "Use fast method entry code for empty methods") \ 2357 \ 2358 product(bool, UseFastAccessorMethods, true, \ 2359 "Use fast method entry code for accessor methods") \ 2360 \ 2361 product_pd(bool, UseOnStackReplacement, \ 2362 "Use on stack replacement, calls runtime if invoc. counter " \ 2363 "overflows in loop") \ 2364 \ 2365 notproduct(bool, TraceOnStackReplacement, false, \ 2366 "Trace on stack replacement") \ 2367 \ 2368 develop(bool, PoisonOSREntry, true, \ 2369 "Detect abnormal calls to OSR code") \ 2370 \ 2371 product_pd(bool, PreferInterpreterNativeStubs, \ 2372 "Use always interpreter stubs for native methods invoked via " \ 2373 "interpreter") \ 2374 \ 2375 develop(bool, CountBytecodes, false, \ 2376 "Count number of bytecodes executed") \ 2377 \ 2378 develop(bool, PrintBytecodeHistogram, false, \ 2379 "Print histogram of the executed bytecodes") \ 2380 \ 2381 develop(bool, PrintBytecodePairHistogram, false, \ 2382 "Print histogram of the executed bytecode pairs") \ 2383 \ 2384 diagnostic(bool, PrintSignatureHandlers, false, \ 2385 "Print code generated for native method signature handlers") \ 2386 \ 2387 develop(bool, VerifyOops, false, \ 2388 "Do plausibility checks for oops") \ 2389 \ 2390 develop(bool, CheckUnhandledOops, false, \ 2391 "Check for unhandled oops in VM code") \ 2392 \ 2393 develop(bool, VerifyJNIFields, trueInDebug, \ 2394 "Verify jfieldIDs for instance fields") \ 2395 \ 2396 notproduct(bool, VerifyJNIEnvThread, false, \ 2397 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2398 "from JNI") \ 2399 \ 2400 develop(bool, VerifyFPU, false, \ 2401 "Verify FPU state (check for NaN's, etc.)") \ 2402 \ 2403 develop(bool, VerifyThread, false, \ 2404 "Watch the thread register for corruption (SPARC only)") \ 2405 \ 2406 develop(bool, VerifyActivationFrameSize, false, \ 2407 "Verify that activation frame didn't become smaller than its " \ 2408 "minimal size") \ 2409 \ 2410 develop(bool, TraceFrequencyInlining, false, \ 2411 "Trace frequency based inlining") \ 2412 \ 2413 notproduct(bool, TraceTypeProfile, false, \ 2414 "Trace type profile") \ 2415 \ 2416 develop_pd(bool, InlineIntrinsics, \ 2417 "Inline intrinsics that can be statically resolved") \ 2418 \ 2419 product_pd(bool, ProfileInterpreter, \ 2420 "Profile at the bytecode level during interpretation") \ 2421 \ 2422 develop_pd(bool, ProfileTraps, \ 2423 "Profile deoptimization traps at the bytecode level") \ 2424 \ 2425 product(intx, ProfileMaturityPercentage, 20, \ 2426 "number of method invocations/branches (expressed as % of " \ 2427 "CompileThreshold) before using the method's profile") \ 2428 \ 2429 develop(bool, PrintMethodData, false, \ 2430 "Print the results of +ProfileInterpreter at end of run") \ 2431 \ 2432 develop(bool, VerifyDataPointer, trueInDebug, \ 2433 "Verify the method data pointer during interpreter profiling") \ 2434 \ 2435 develop(bool, VerifyCompiledCode, false, \ 2436 "Include miscellaneous runtime verifications in nmethod code; " \ 2437 "off by default because it disturbs nmethod size heuristics.") \ 2438 \ 2439 \ 2440 /* compilation */ \ 2441 product(bool, UseCompiler, true, \ 2442 "use compilation") \ 2443 \ 2444 develop(bool, TraceCompilationPolicy, false, \ 2445 "Trace compilation policy") \ 2446 \ 2447 develop(bool, TimeCompilationPolicy, false, \ 2448 "Time the compilation policy") \ 2449 \ 2450 product(bool, UseCounterDecay, true, \ 2451 "adjust recompilation counters") \ 2452 \ 2453 develop(intx, CounterHalfLifeTime, 30, \ 2454 "half-life time of invocation counters (in secs)") \ 2455 \ 2456 develop(intx, CounterDecayMinIntervalLength, 500, \ 2457 "Min. ms. between invocation of CounterDecay") \ 2458 \ 2459 product(bool, AlwaysCompileLoopMethods, false, \ 2460 "when using recompilation, never interpret methods " \ 2461 "containing loops") \ 2462 \ 2463 product(bool, DontCompileHugeMethods, true, \ 2464 "don't compile methods > HugeMethodLimit") \ 2465 \ 2466 /* Bytecode escape analysis estimation. */ \ 2467 product(bool, EstimateArgEscape, true, \ 2468 "Analyze bytecodes to estimate escape state of arguments") \ 2469 \ 2470 product(intx, BCEATraceLevel, 0, \ 2471 "How much tracing to do of bytecode escape analysis estimates") \ 2472 \ 2473 product(intx, MaxBCEAEstimateLevel, 5, \ 2474 "Maximum number of nested calls that are analyzed by BC EA.") \ 2475 \ 2476 product(intx, MaxBCEAEstimateSize, 150, \ 2477 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2478 \ 2479 product(intx, AllocatePrefetchStyle, 1, \ 2480 "0 = no prefetch, " \ 2481 "1 = prefetch instructions for each allocation, " \ 2482 "2 = use TLAB watermark to gate allocation prefetch") \ 2483 \ 2484 product(intx, AllocatePrefetchDistance, -1, \ 2485 "Distance to prefetch ahead of allocation pointer") \ 2486 \ 2487 product(intx, AllocatePrefetchLines, 1, \ 2488 "Number of lines to prefetch ahead of allocation pointer") \ 2489 \ 2490 product(intx, AllocatePrefetchStepSize, 16, \ 2491 "Step size in bytes of sequential prefetch instructions") \ 2492 \ 2493 product(intx, AllocatePrefetchInstr, 0, \ 2494 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2495 \ 2496 product(intx, ReadPrefetchInstr, 0, \ 2497 "Prefetch instruction to prefetch ahead") \ 2498 \ 2499 /* deoptimization */ \ 2500 develop(bool, TraceDeoptimization, false, \ 2501 "Trace deoptimization") \ 2502 \ 2503 develop(bool, DebugDeoptimization, false, \ 2504 "Tracing various information while debugging deoptimization") \ 2505 \ 2506 product(intx, SelfDestructTimer, 0, \ 2507 "Will cause VM to terminate after a given time (in minutes) " \ 2508 "(0 means off)") \ 2509 \ 2510 product(intx, MaxJavaStackTraceDepth, 1024, \ 2511 "Max. no. of lines in the stack trace for Java exceptions " \ 2512 "(0 means all)") \ 2513 \ 2514 develop(intx, GuaranteedSafepointInterval, 1000, \ 2515 "Guarantee a safepoint (at least) every so many milliseconds " \ 2516 "(0 means none)") \ 2517 \ 2518 product(intx, SafepointTimeoutDelay, 10000, \ 2519 "Delay in milliseconds for option SafepointTimeout") \ 2520 \ 2521 product(intx, NmethodSweepFraction, 4, \ 2522 "Number of invocations of sweeper to cover all nmethods") \ 2523 \ 2524 notproduct(intx, MemProfilingInterval, 500, \ 2525 "Time between each invocation of the MemProfiler") \ 2526 \ 2527 develop(intx, MallocCatchPtr, -1, \ 2528 "Hit breakpoint when mallocing/freeing this pointer") \ 2529 \ 2530 notproduct(intx, AssertRepeat, 1, \ 2531 "number of times to evaluate expression in assert " \ 2532 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2533 \ 2534 notproduct(ccstrlist, SuppressErrorAt, "", \ 2535 "List of assertions (file:line) to muzzle") \ 2536 \ 2537 notproduct(uintx, HandleAllocationLimit, 1024, \ 2538 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2539 "is used") \ 2540 \ 2541 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2542 "Threshold for total handle allocation when " \ 2543 "+TraceHandleAllocation is used") \ 2544 \ 2545 develop(intx, StackPrintLimit, 100, \ 2546 "number of stack frames to print in VM-level stack dump") \ 2547 \ 2548 notproduct(intx, MaxElementPrintSize, 256, \ 2549 "maximum number of elements to print") \ 2550 \ 2551 notproduct(intx, MaxSubklassPrintSize, 4, \ 2552 "maximum number of subklasses to print when printing klass") \ 2553 \ 2554 develop(intx, MaxInlineLevel, 9, \ 2555 "maximum number of nested calls that are inlined") \ 2556 \ 2557 develop(intx, MaxRecursiveInlineLevel, 1, \ 2558 "maximum number of nested recursive calls that are inlined") \ 2559 \ 2560 develop(intx, InlineSmallCode, 1000, \ 2561 "Only inline already compiled methods if their code size is " \ 2562 "less than this") \ 2563 \ 2564 product(intx, MaxInlineSize, 35, \ 2565 "maximum bytecode size of a method to be inlined") \ 2566 \ 2567 product_pd(intx, FreqInlineSize, \ 2568 "maximum bytecode size of a frequent method to be inlined") \ 2569 \ 2570 develop(intx, MaxTrivialSize, 6, \ 2571 "maximum bytecode size of a trivial method to be inlined") \ 2572 \ 2573 develop(intx, MinInliningThreshold, 250, \ 2574 "min. invocation count a method needs to have to be inlined") \ 2575 \ 2576 develop(intx, AlignEntryCode, 4, \ 2577 "aligns entry code to specified value (in bytes)") \ 2578 \ 2579 develop(intx, MethodHistogramCutoff, 100, \ 2580 "cutoff value for method invoc. histogram (+CountCalls)") \ 2581 \ 2582 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2583 "# of interpreted methods to show in profile") \ 2584 \ 2585 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2586 "# of compiled methods to show in profile") \ 2587 \ 2588 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2589 "# of stub methods to show in profile") \ 2590 \ 2591 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2592 "# of runtime stub nodes to show in profile") \ 2593 \ 2594 product(intx, ProfileIntervalsTicks, 100, \ 2595 "# of ticks between printing of interval profile " \ 2596 "(+ProfileIntervals)") \ 2597 \ 2598 notproduct(intx, ScavengeALotInterval, 1, \ 2599 "Interval between which scavenge will occur with +ScavengeALot") \ 2600 \ 2601 notproduct(intx, FullGCALotInterval, 1, \ 2602 "Interval between which full gc will occur with +FullGCALot") \ 2603 \ 2604 notproduct(intx, FullGCALotStart, 0, \ 2605 "For which invocation to start FullGCAlot") \ 2606 \ 2607 notproduct(intx, FullGCALotDummies, 32*K, \ 2608 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2609 "to move") \ 2610 \ 2611 develop(intx, DontYieldALotInterval, 10, \ 2612 "Interval between which yields will be dropped (milliseconds)") \ 2613 \ 2614 develop(intx, MinSleepInterval, 1, \ 2615 "Minimum sleep() interval (milliseconds) when " \ 2616 "ConvertSleepToYield is off (used for SOLARIS)") \ 2617 \ 2618 product(intx, EventLogLength, 2000, \ 2619 "maximum nof events in event log") \ 2620 \ 2621 develop(intx, ProfilerPCTickThreshold, 15, \ 2622 "Number of ticks in a PC buckets to be a hotspot") \ 2623 \ 2624 notproduct(intx, DeoptimizeALotInterval, 5, \ 2625 "Number of exits until DeoptimizeALot kicks in") \ 2626 \ 2627 notproduct(intx, ZombieALotInterval, 5, \ 2628 "Number of exits until ZombieALot kicks in") \ 2629 \ 2630 develop(bool, StressNonEntrant, false, \ 2631 "Mark nmethods non-entrant at registration") \ 2632 \ 2633 diagnostic(intx, MallocVerifyInterval, 0, \ 2634 "if non-zero, verify C heap after every N calls to " \ 2635 "malloc/realloc/free") \ 2636 \ 2637 diagnostic(intx, MallocVerifyStart, 0, \ 2638 "if non-zero, start verifying C heap after Nth call to " \ 2639 "malloc/realloc/free") \ 2640 \ 2641 product(intx, TypeProfileWidth, 2, \ 2642 "number of receiver types to record in call/cast profile") \ 2643 \ 2644 develop(intx, BciProfileWidth, 2, \ 2645 "number of return bci's to record in ret profile") \ 2646 \ 2647 product(intx, PerMethodRecompilationCutoff, 400, \ 2648 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2649 \ 2650 product(intx, PerBytecodeRecompilationCutoff, 100, \ 2651 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2652 \ 2653 product(intx, PerMethodTrapLimit, 100, \ 2654 "Limit on traps (of one kind) in a method (includes inlines)") \ 2655 \ 2656 product(intx, PerBytecodeTrapLimit, 4, \ 2657 "Limit on traps (of one kind) at a particular BCI") \ 2658 \ 2659 develop(intx, FreqCountInvocations, 1, \ 2660 "Scaling factor for branch frequencies (deprecated)") \ 2661 \ 2662 develop(intx, InlineFrequencyRatio, 20, \ 2663 "Ratio of call site execution to caller method invocation") \ 2664 \ 2665 develop_pd(intx, InlineFrequencyCount, \ 2666 "Count of call site execution necessary to trigger frequent " \ 2667 "inlining") \ 2668 \ 2669 develop(intx, InlineThrowCount, 50, \ 2670 "Force inlining of interpreted methods that throw this often") \ 2671 \ 2672 develop(intx, InlineThrowMaxSize, 200, \ 2673 "Force inlining of throwing methods smaller than this") \ 2674 \ 2675 product(intx, AliasLevel, 3, \ 2676 "0 for no aliasing, 1 for oop/field/static/array split, " \ 2677 "2 for class split, 3 for unique instances") \ 2678 \ 2679 develop(bool, VerifyAliases, false, \ 2680 "perform extra checks on the results of alias analysis") \ 2681 \ 2682 develop(intx, ProfilerNodeSize, 1024, \ 2683 "Size in K to allocate for the Profile Nodes of each thread") \ 2684 \ 2685 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ 2686 "Number of times to spin wait on a v8 atomic operation lock") \ 2687 \ 2688 product(intx, ReadSpinIterations, 100, \ 2689 "Number of read attempts before a yield (spin inner loop)") \ 2690 \ 2691 product_pd(intx, PreInflateSpin, \ 2692 "Number of times to spin wait before inflation") \ 2693 \ 2694 product(intx, PreBlockSpin, 10, \ 2695 "Number of times to spin in an inflated lock before going to " \ 2696 "an OS lock") \ 2697 \ 2698 /* gc parameters */ \ 2699 product(uintx, MaxHeapSize, ScaleForWordSize(64*M), \ 2700 "Default maximum size for object heap (in bytes)") \ 2701 \ 2702 product_pd(uintx, NewSize, \ 2703 "Default size of new generation (in bytes)") \ 2704 \ 2705 product(uintx, MaxNewSize, max_uintx, \ 2706 "Maximum size of new generation (in bytes)") \ 2707 \ 2708 product(uintx, PretenureSizeThreshold, 0, \ 2709 "Max size in bytes of objects allocated in DefNew generation") \ 2710 \ 2711 product_pd(uintx, TLABSize, \ 2712 "Default (or starting) size of TLAB (in bytes)") \ 2713 \ 2714 product(uintx, MinTLABSize, 2*K, \ 2715 "Minimum allowed TLAB size (in bytes)") \ 2716 \ 2717 product(uintx, TLABAllocationWeight, 35, \ 2718 "Allocation averaging weight") \ 2719 \ 2720 product(uintx, TLABWasteTargetPercent, 1, \ 2721 "Percentage of Eden that can be wasted") \ 2722 \ 2723 product(uintx, TLABRefillWasteFraction, 64, \ 2724 "Max TLAB waste at a refill (internal fragmentation)") \ 2725 \ 2726 product(uintx, TLABWasteIncrement, 4, \ 2727 "Increment allowed waste at slow allocation") \ 2728 \ 2729 product_pd(intx, SurvivorRatio, \ 2730 "Ratio of eden/survivor space size") \ 2731 \ 2732 product_pd(intx, NewRatio, \ 2733 "Ratio of new/old generation sizes") \ 2734 \ 2735 product(uintx, MaxLiveObjectEvacuationRatio, 100, \ 2736 "Max percent of eden objects that will be live at scavenge") \ 2737 \ 2738 product_pd(uintx, NewSizeThreadIncrease, \ 2739 "Additional size added to desired new generation size per " \ 2740 "non-daemon thread (in bytes)") \ 2741 \ 2742 product(uintx, OldSize, ScaleForWordSize(4096*K), \ 2743 "Default size of tenured generation (in bytes)") \ 2744 \ 2745 product_pd(uintx, PermSize, \ 2746 "Default size of permanent generation (in bytes)") \ 2747 \ 2748 product_pd(uintx, MaxPermSize, \ 2749 "Maximum size of permanent generation (in bytes)") \ 2750 \ 2751 product(uintx, MinHeapFreeRatio, 40, \ 2752 "Min percentage of heap free after GC to avoid expansion") \ 2753 \ 2754 product(uintx, MaxHeapFreeRatio, 70, \ 2755 "Max percentage of heap free after GC to avoid shrinking") \ 2756 \ 2757 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 2758 "Number of milliseconds per MB of free space in the heap") \ 2759 \ 2760 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 2761 "Min change in heap space due to GC (in bytes)") \ 2762 \ 2763 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ 2764 "Min expansion of permanent heap (in bytes)") \ 2765 \ 2766 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ 2767 "Max expansion of permanent heap without full GC (in bytes)") \ 2768 \ 2769 product(intx, QueuedAllocationWarningCount, 0, \ 2770 "Number of times an allocation that queues behind a GC " \ 2771 "will retry before printing a warning") \ 2772 \ 2773 diagnostic(uintx, VerifyGCStartAt, 0, \ 2774 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 2775 \ 2776 diagnostic(intx, VerifyGCLevel, 0, \ 2777 "Generation level at which to start +VerifyBefore/AfterGC") \ 2778 \ 2779 develop(uintx, ExitAfterGCNum, 0, \ 2780 "If non-zero, exit after this GC.") \ 2781 \ 2782 product(intx, MaxTenuringThreshold, 15, \ 2783 "Maximum value for tenuring threshold") \ 2784 \ 2785 product(intx, InitialTenuringThreshold, 7, \ 2786 "Initial value for tenuring threshold") \ 2787 \ 2788 product(intx, TargetSurvivorRatio, 50, \ 2789 "Desired percentage of survivor space used after scavenge") \ 2790 \ 2791 product(intx, MarkSweepDeadRatio, 5, \ 2792 "Percentage (0-100) of the old gen allowed as dead wood." \ 2793 "Serial mark sweep treats this as both the min and max value." \ 2794 "CMS uses this value only if it falls back to mark sweep." \ 2795 "Par compact uses a variable scale based on the density of the" \ 2796 "generation and treats this as the max value when the heap is" \ 2797 "either completely full or completely empty. Par compact also" \ 2798 "has a smaller default value; see arguments.cpp.") \ 2799 \ 2800 product(intx, PermMarkSweepDeadRatio, 20, \ 2801 "Percentage (0-100) of the perm gen allowed as dead wood." \ 2802 "See MarkSweepDeadRatio for collector-specific comments.") \ 2803 \ 2804 product(intx, MarkSweepAlwaysCompactCount, 4, \ 2805 "How often should we fully compact the heap (ignoring the dead " \ 2806 "space parameters)") \ 2807 \ 2808 product(intx, PrintCMSStatistics, 0, \ 2809 "Statistics for CMS") \ 2810 \ 2811 product(bool, PrintCMSInitiationStatistics, false, \ 2812 "Statistics for initiating a CMS collection") \ 2813 \ 2814 product(intx, PrintFLSStatistics, 0, \ 2815 "Statistics for CMS' FreeListSpace") \ 2816 \ 2817 product(intx, PrintFLSCensus, 0, \ 2818 "Census for CMS' FreeListSpace") \ 2819 \ 2820 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 2821 "Delay in ms between expansion and allocation") \ 2822 \ 2823 product(intx, DeferThrSuspendLoopCount, 4000, \ 2824 "(Unstable) Number of times to iterate in safepoint loop " \ 2825 " before blocking VM threads ") \ 2826 \ 2827 product(intx, DeferPollingPageLoopCount, -1, \ 2828 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 2829 "before changing safepoint polling page to RO ") \ 2830 \ 2831 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 2832 \ 2833 product(bool, UseDepthFirstScavengeOrder, true, \ 2834 "true: the scavenge order will be depth-first, " \ 2835 "false: the scavenge order will be breadth-first") \ 2836 \ 2837 product(bool, PSChunkLargeArrays, true, \ 2838 "true: process large arrays in chunks") \ 2839 \ 2840 product(uintx, GCDrainStackTargetSize, 64, \ 2841 "how many entries we'll try to leave on the stack during " \ 2842 "parallel GC") \ 2843 \ 2844 product(intx, DCQBarrierQueueBufferSize, 256, \ 2845 "Number of elements in a dirty card queue buffer") \ 2846 \ 2847 product(intx, DCQBarrierProcessCompletedThreshold, 5, \ 2848 "Number of completed dirty card buffers to trigger processing.") \ 2849 \ 2850 /* stack parameters */ \ 2851 product_pd(intx, StackYellowPages, \ 2852 "Number of yellow zone (recoverable overflows) pages") \ 2853 \ 2854 product_pd(intx, StackRedPages, \ 2855 "Number of red zone (unrecoverable overflows) pages") \ 2856 \ 2857 product_pd(intx, StackShadowPages, \ 2858 "Number of shadow zone (for overflow checking) pages" \ 2859 " this should exceed the depth of the VM and native call stack") \ 2860 \ 2861 product_pd(intx, ThreadStackSize, \ 2862 "Thread Stack Size (in Kbytes)") \ 2863 \ 2864 product_pd(intx, VMThreadStackSize, \ 2865 "Non-Java Thread Stack Size (in Kbytes)") \ 2866 \ 2867 product_pd(intx, CompilerThreadStackSize, \ 2868 "Compiler Thread Stack Size (in Kbytes)") \ 2869 \ 2870 develop_pd(uintx, JVMInvokeMethodSlack, \ 2871 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 2872 \ 2873 product(uintx, ThreadSafetyMargin, 50*M, \ 2874 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 2875 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 2876 "disable this feature") \ 2877 \ 2878 /* code cache parameters */ \ 2879 develop(uintx, CodeCacheSegmentSize, 64, \ 2880 "Code cache segment size (in bytes) - smallest unit of " \ 2881 "allocation") \ 2882 \ 2883 develop_pd(intx, CodeEntryAlignment, \ 2884 "Code entry alignment for generated code (in bytes)") \ 2885 \ 2886 product_pd(uintx, InitialCodeCacheSize, \ 2887 "Initial code cache size (in bytes)") \ 2888 \ 2889 product_pd(uintx, ReservedCodeCacheSize, \ 2890 "Reserved code cache size (in bytes) - maximum code cache size") \ 2891 \ 2892 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 2893 "When less than X space left, we stop compiling.") \ 2894 \ 2895 product_pd(uintx, CodeCacheExpansionSize, \ 2896 "Code cache expansion size (in bytes)") \ 2897 \ 2898 develop_pd(uintx, CodeCacheMinBlockLength, \ 2899 "Minimum number of segments in a code cache block.") \ 2900 \ 2901 notproduct(bool, ExitOnFullCodeCache, false, \ 2902 "Exit the VM if we fill the code cache.") \ 2903 \ 2904 /* interpreter debugging */ \ 2905 develop(intx, BinarySwitchThreshold, 5, \ 2906 "Minimal number of lookupswitch entries for rewriting to binary " \ 2907 "switch") \ 2908 \ 2909 develop(intx, StopInterpreterAt, 0, \ 2910 "Stops interpreter execution at specified bytecode number") \ 2911 \ 2912 develop(intx, TraceBytecodesAt, 0, \ 2913 "Traces bytecodes starting with specified bytecode number") \ 2914 \ 2915 /* compiler interface */ \ 2916 develop(intx, CIStart, 0, \ 2917 "the id of the first compilation to permit") \ 2918 \ 2919 develop(intx, CIStop, -1, \ 2920 "the id of the last compilation to permit") \ 2921 \ 2922 develop(intx, CIStartOSR, 0, \ 2923 "the id of the first osr compilation to permit " \ 2924 "(CICountOSR must be on)") \ 2925 \ 2926 develop(intx, CIStopOSR, -1, \ 2927 "the id of the last osr compilation to permit " \ 2928 "(CICountOSR must be on)") \ 2929 \ 2930 develop(intx, CIBreakAtOSR, -1, \ 2931 "id of osr compilation to break at") \ 2932 \ 2933 develop(intx, CIBreakAt, -1, \ 2934 "id of compilation to break at") \ 2935 \ 2936 product(ccstrlist, CompileOnly, "", \ 2937 "List of methods (pkg/class.name) to restrict compilation to") \ 2938 \ 2939 product(ccstr, CompileCommandFile, NULL, \ 2940 "Read compiler commands from this file [.hotspot_compiler]") \ 2941 \ 2942 product(ccstrlist, CompileCommand, "", \ 2943 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 2944 \ 2945 product(bool, CICompilerCountPerCPU, false, \ 2946 "1 compiler thread for log(N CPUs)") \ 2947 \ 2948 develop(intx, CIFireOOMAt, -1, \ 2949 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 2950 "(non-negative value throws OOM after this many CI accesses " \ 2951 "in each compile)") \ 2952 \ 2953 develop(intx, CIFireOOMAtDelay, -1, \ 2954 "Wait for this many CI accesses to occur in all compiles before " \ 2955 "beginning to throw OutOfMemoryErrors in each compile") \ 2956 \ 2957 /* Priorities */ \ 2958 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 2959 \ 2960 product(intx, ThreadPriorityPolicy, 0, \ 2961 "0 : Normal. "\ 2962 " VM chooses priorities that are appropriate for normal "\ 2963 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 2964 " to normal native priority. Java priorities below NORM_PRIORITY"\ 2965 " map to lower native priority values. On Windows applications"\ 2966 " are allowed to use higher native priorities. However, with "\ 2967 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 2968 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 2969 " interfere with system threads. On Linux thread priorities "\ 2970 " are ignored because the OS does not support static priority "\ 2971 " in SCHED_OTHER scheduling class which is the only choice for"\ 2972 " non-root, non-realtime applications. "\ 2973 "1 : Aggressive. "\ 2974 " Java thread priorities map over to the entire range of "\ 2975 " native thread priorities. Higher Java thread priorities map "\ 2976 " to higher native thread priorities. This policy should be "\ 2977 " used with care, as sometimes it can cause performance "\ 2978 " degradation in the application and/or the entire system. On "\ 2979 " Linux this policy requires root privilege.") \ 2980 \ 2981 product(bool, ThreadPriorityVerbose, false, \ 2982 "print priority changes") \ 2983 \ 2984 product(intx, DefaultThreadPriority, -1, \ 2985 "what native priority threads run at if not specified elsewhere (-1 means no change)") \ 2986 \ 2987 product(intx, CompilerThreadPriority, -1, \ 2988 "what priority should compiler threads run at (-1 means no change)") \ 2989 \ 2990 product(intx, VMThreadPriority, -1, \ 2991 "what priority should VM threads run at (-1 means no change)") \ 2992 \ 2993 product(bool, CompilerThreadHintNoPreempt, true, \ 2994 "(Solaris only) Give compiler threads an extra quanta") \ 2995 \ 2996 product(bool, VMThreadHintNoPreempt, false, \ 2997 "(Solaris only) Give VM thread an extra quanta") \ 2998 \ 2999 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3000 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3001 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3002 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3003 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3004 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3005 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3006 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3007 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3008 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3009 \ 3010 /* compiler debugging */ \ 3011 notproduct(intx, CompileTheWorldStartAt, 1, \ 3012 "First class to consider when using +CompileTheWorld") \ 3013 \ 3014 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3015 "Last class to consider when using +CompileTheWorld") \ 3016 \ 3017 develop(intx, NewCodeParameter, 0, \ 3018 "Testing Only: Create a dedicated integer parameter before " \ 3019 "putback") \ 3020 \ 3021 /* new oopmap storage allocation */ \ 3022 develop(intx, MinOopMapAllocation, 8, \ 3023 "Minimum number of OopMap entries in an OopMapSet") \ 3024 \ 3025 /* Background Compilation */ \ 3026 develop(intx, LongCompileThreshold, 50, \ 3027 "Used with +TraceLongCompiles") \ 3028 \ 3029 product(intx, StarvationMonitorInterval, 200, \ 3030 "Pause between each check in ms") \ 3031 \ 3032 /* recompilation */ \ 3033 product_pd(intx, CompileThreshold, \ 3034 "number of interpreted method invocations before (re-)compiling") \ 3035 \ 3036 product_pd(intx, BackEdgeThreshold, \ 3037 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3038 \ 3039 product(intx, Tier1BytecodeLimit, 10, \ 3040 "Must have at least this many bytecodes before tier1" \ 3041 "invocation counters are used") \ 3042 \ 3043 product_pd(intx, Tier2CompileThreshold, \ 3044 "threshold at which a tier 2 compilation is invoked") \ 3045 \ 3046 product_pd(intx, Tier2BackEdgeThreshold, \ 3047 "Back edge threshold at which a tier 2 compilation is invoked") \ 3048 \ 3049 product_pd(intx, Tier3CompileThreshold, \ 3050 "threshold at which a tier 3 compilation is invoked") \ 3051 \ 3052 product_pd(intx, Tier3BackEdgeThreshold, \ 3053 "Back edge threshold at which a tier 3 compilation is invoked") \ 3054 \ 3055 product_pd(intx, Tier4CompileThreshold, \ 3056 "threshold at which a tier 4 compilation is invoked") \ 3057 \ 3058 product_pd(intx, Tier4BackEdgeThreshold, \ 3059 "Back edge threshold at which a tier 4 compilation is invoked") \ 3060 \ 3061 product_pd(bool, TieredCompilation, \ 3062 "Enable two-tier compilation") \ 3063 \ 3064 product(bool, StressTieredRuntime, false, \ 3065 "Alternate client and server compiler on compile requests") \ 3066 \ 3067 product_pd(intx, OnStackReplacePercentage, \ 3068 "NON_TIERED number of method invocations/branches (expressed as %"\ 3069 "of CompileThreshold) before (re-)compiling OSR code") \ 3070 \ 3071 product(intx, InterpreterProfilePercentage, 33, \ 3072 "NON_TIERED number of method invocations/branches (expressed as %"\ 3073 "of CompileThreshold) before profiling in the interpreter") \ 3074 \ 3075 develop(intx, MaxRecompilationSearchLength, 10, \ 3076 "max. # frames to inspect searching for recompilee") \ 3077 \ 3078 develop(intx, MaxInterpretedSearchLength, 3, \ 3079 "max. # interp. frames to skip when searching for recompilee") \ 3080 \ 3081 develop(intx, DesiredMethodLimit, 8000, \ 3082 "desired max. method size (in bytecodes) after inlining") \ 3083 \ 3084 develop(intx, HugeMethodLimit, 8000, \ 3085 "don't compile methods larger than this if " \ 3086 "+DontCompileHugeMethods") \ 3087 \ 3088 /* New JDK 1.4 reflection implementation */ \ 3089 \ 3090 develop(bool, UseNewReflection, true, \ 3091 "Temporary flag for transition to reflection based on dynamic " \ 3092 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3093 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3094 "changes were needed") \ 3095 \ 3096 develop(bool, VerifyReflectionBytecodes, false, \ 3097 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3098 "in situations like that described in 4486457 or for " \ 3099 "constructors generated for serialization, so can not be enabled "\ 3100 "in product.") \ 3101 \ 3102 product(bool, ReflectionWrapResolutionErrors, true, \ 3103 "Temporary flag for transition to AbstractMethodError wrapped " \ 3104 "in InvocationTargetException. See 6531596") \ 3105 \ 3106 \ 3107 develop(intx, FastSuperclassLimit, 8, \ 3108 "Depth of hardwired instanceof accelerator array") \ 3109 \ 3110 /* Properties for Java libraries */ \ 3111 \ 3112 product(intx, MaxDirectMemorySize, -1, \ 3113 "Maximum total size of NIO direct-buffer allocations") \ 3114 \ 3115 /* temporary developer defined flags */ \ 3116 \ 3117 diagnostic(bool, UseNewCode, false, \ 3118 "Testing Only: Use the new version while testing") \ 3119 \ 3120 diagnostic(bool, UseNewCode2, false, \ 3121 "Testing Only: Use the new version while testing") \ 3122 \ 3123 diagnostic(bool, UseNewCode3, false, \ 3124 "Testing Only: Use the new version while testing") \ 3125 \ 3126 /* flags for performance data collection */ \ 3127 \ 3128 product(bool, UsePerfData, true, \ 3129 "Flag to disable jvmstat instrumentation for performance testing" \ 3130 "and problem isolation purposes.") \ 3131 \ 3132 product(bool, PerfDataSaveToFile, false, \ 3133 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3134 \ 3135 product(ccstr, PerfDataSaveFile, NULL, \ 3136 "Save PerfData memory to the specified absolute pathname," \ 3137 "%p in the file name if present will be replaced by pid") \ 3138 \ 3139 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3140 "Data sampling interval in milliseconds") \ 3141 \ 3142 develop(bool, PerfTraceDataCreation, false, \ 3143 "Trace creation of Performance Data Entries") \ 3144 \ 3145 develop(bool, PerfTraceMemOps, false, \ 3146 "Trace PerfMemory create/attach/detach calls") \ 3147 \ 3148 product(bool, PerfDisableSharedMem, false, \ 3149 "Store performance data in standard memory") \ 3150 \ 3151 product(intx, PerfDataMemorySize, 32*K, \ 3152 "Size of performance data memory region. Will be rounded " \ 3153 "up to a multiple of the native os page size.") \ 3154 \ 3155 product(intx, PerfMaxStringConstLength, 1024, \ 3156 "Maximum PerfStringConstant string length before truncation") \ 3157 \ 3158 product(bool, PerfAllowAtExitRegistration, false, \ 3159 "Allow registration of atexit() methods") \ 3160 \ 3161 product(bool, PerfBypassFileSystemCheck, false, \ 3162 "Bypass Win32 file system criteria checks (Windows Only)") \ 3163 \ 3164 product(intx, UnguardOnExecutionViolation, 0, \ 3165 "Unguard page and retry on no-execute fault (Win32 only)" \ 3166 "0=off, 1=conservative, 2=aggressive") \ 3167 \ 3168 /* Serviceability Support */ \ 3169 \ 3170 product(bool, ManagementServer, false, \ 3171 "Create JMX Management Server") \ 3172 \ 3173 product(bool, DisableAttachMechanism, false, \ 3174 "Disable mechanism that allows tools to attach to this VM") \ 3175 \ 3176 product(bool, StartAttachListener, false, \ 3177 "Always start Attach Listener at VM startup") \ 3178 \ 3179 manageable(bool, PrintConcurrentLocks, false, \ 3180 "Print java.util.concurrent locks in thread dump") \ 3181 \ 3182 /* Shared spaces */ \ 3183 \ 3184 product(bool, UseSharedSpaces, true, \ 3185 "Use shared spaces in the permanent generation") \ 3186 \ 3187 product(bool, RequireSharedSpaces, false, \ 3188 "Require shared spaces in the permanent generation") \ 3189 \ 3190 product(bool, ForceSharedSpaces, false, \ 3191 "Require shared spaces in the permanent generation") \ 3192 \ 3193 product(bool, DumpSharedSpaces, false, \ 3194 "Special mode: JVM reads a class list, loads classes, builds " \ 3195 "shared spaces, and dumps the shared spaces to a file to be " \ 3196 "used in future JVM runs.") \ 3197 \ 3198 product(bool, PrintSharedSpaces, false, \ 3199 "Print usage of shared spaces") \ 3200 \ 3201 product(uintx, SharedDummyBlockSize, 512*M, \ 3202 "Size of dummy block used to shift heap addresses (in bytes)") \ 3203 \ 3204 product(uintx, SharedReadWriteSize, 12*M, \ 3205 "Size of read-write space in permanent generation (in bytes)") \ 3206 \ 3207 product(uintx, SharedReadOnlySize, 8*M, \ 3208 "Size of read-only space in permanent generation (in bytes)") \ 3209 \ 3210 product(uintx, SharedMiscDataSize, 4*M, \ 3211 "Size of the shared data area adjacent to the heap (in bytes)") \ 3212 \ 3213 product(uintx, SharedMiscCodeSize, 4*M, \ 3214 "Size of the shared code area adjacent to the heap (in bytes)") \ 3215 \ 3216 diagnostic(bool, SharedOptimizeColdStart, true, \ 3217 "At dump time, order shared objects to achieve better " \ 3218 "cold startup time.") \ 3219 \ 3220 develop(intx, SharedOptimizeColdStartPolicy, 2, \ 3221 "Reordering policy for SharedOptimizeColdStart " \ 3222 "0=favor classload-time locality, 1=balanced, " \ 3223 "2=favor runtime locality") \ 3224 \ 3225 diagnostic(bool, SharedSkipVerify, false, \ 3226 "Skip assert() and verify() which page-in unwanted shared " \ 3227 "objects. ") \ 3228 \ 3229 product(bool, TaggedStackInterpreter, false, \ 3230 "Insert tags in interpreter execution stack for oopmap generaion")\ 3231 \ 3232 diagnostic(bool, PauseAtStartup, false, \ 3233 "Causes the VM to pause at startup time and wait for the pause " \ 3234 "file to be removed (default: ./vm.paused.<pid>)") \ 3235 \ 3236 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3237 "The file to create and for whose removal to await when pausing " \ 3238 "at startup. (default: ./vm.paused.<pid>)") \ 3239 \ 3240 product(bool, ExtendedDTraceProbes, false, \ 3241 "Enable performance-impacting dtrace probes") \ 3242 \ 3243 product(bool, DTraceMethodProbes, false, \ 3244 "Enable dtrace probes for method-entry and method-exit") \ 3245 \ 3246 product(bool, DTraceAllocProbes, false, \ 3247 "Enable dtrace probes for object allocation") \ 3248 \ 3249 product(bool, DTraceMonitorProbes, false, \ 3250 "Enable dtrace probes for monitor events") \ 3251 \ 3252 product(bool, RelaxAccessControlCheck, false, \ 3253 "Relax the access control checks in the verifier") \ 3254 \ 3255 diagnostic(bool, PrintDTraceDOF, false, \ 3256 "Print the DTrace DOF passed to the system for JSDT probes") \ 3257 \ 3258 product(bool, UseVMInterruptibleIO, true, \ 3259 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3260 "EINTR for I/O operations results in OS_INTRPT") 3261 3262 3263/* 3264 * Macros for factoring of globals 3265 */ 3266 3267// Interface macros 3268#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3269#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3270#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3271#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3272#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3273#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3274#ifdef PRODUCT 3275#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3276#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3277#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3278#else 3279#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3280#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3281#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3282#endif 3283// Special LP64 flags, product only needed for now. 3284#ifdef _LP64 3285#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3286#else 3287#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3288#endif // _LP64 3289 3290// Implementation macros 3291#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3292#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3293#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3294#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3295#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3296#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3297#ifdef PRODUCT 3298#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3299#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3300#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3301#else 3302#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3303#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3304#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3305#endif 3306#ifdef _LP64 3307#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3308#else 3309#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3310#endif // _LP64 3311 3312RUNTIME_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) 3313 3314RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3315