globals.hpp revision 484:ffe19141e312
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 product_pd(bool, UseLargePagesIndividualAllocation, \ 334 "Allocate large pages individually for better affinity") \ 335 \ 336 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 337 "Fail large pages individual allocation") \ 338 \ 339 develop(bool, TracePageSizes, false, \ 340 "Trace page size selection and usage.") \ 341 \ 342 product(bool, UseNUMA, false, \ 343 "Use NUMA if available") \ 344 \ 345 product(bool, ForceNUMA, false, \ 346 "Force NUMA optimizations on single-node/UMA systems") \ 347 \ 348 product(intx, NUMAChunkResizeWeight, 20, \ 349 "Percentage (0-100) used to weight the current sample when " \ 350 "computing exponentially decaying average for " \ 351 "AdaptiveNUMAChunkSizing") \ 352 \ 353 product(intx, NUMASpaceResizeRate, 1*G, \ 354 "Do not reallocate more that this amount per collection") \ 355 \ 356 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 357 "Enable adaptive chunk sizing for NUMA") \ 358 \ 359 product(bool, NUMAStats, false, \ 360 "Print NUMA stats in detailed heap information") \ 361 \ 362 product(intx, NUMAPageScanRate, 256, \ 363 "Maximum number of pages to include in the page scan procedure") \ 364 \ 365 product_pd(bool, NeedsDeoptSuspend, \ 366 "True for register window machines (sparc/ia64)") \ 367 \ 368 product(intx, UseSSE, 99, \ 369 "Highest supported SSE instructions set on x86/x64") \ 370 \ 371 product(uintx, LargePageSizeInBytes, 0, \ 372 "Large page size (0 to let VM choose the page size") \ 373 \ 374 product(uintx, LargePageHeapSizeThreshold, 128*M, \ 375 "Use large pages if max heap is at least this big") \ 376 \ 377 product(bool, ForceTimeHighResolution, false, \ 378 "Using high time resolution(For Win32 only)") \ 379 \ 380 develop(bool, TraceItables, false, \ 381 "Trace initialization and use of itables") \ 382 \ 383 develop(bool, TracePcPatching, false, \ 384 "Trace usage of frame::patch_pc") \ 385 \ 386 develop(bool, TraceJumps, false, \ 387 "Trace assembly jumps in thread ring buffer") \ 388 \ 389 develop(bool, TraceRelocator, false, \ 390 "Trace the bytecode relocator") \ 391 \ 392 develop(bool, TraceLongCompiles, false, \ 393 "Print out every time compilation is longer than " \ 394 "a given threashold") \ 395 \ 396 develop(bool, SafepointALot, false, \ 397 "Generates a lot of safepoints. Works with " \ 398 "GuaranteedSafepointInterval") \ 399 \ 400 product_pd(bool, BackgroundCompilation, \ 401 "A thread requesting compilation is not blocked during " \ 402 "compilation") \ 403 \ 404 product(bool, PrintVMQWaitTime, false, \ 405 "Prints out the waiting time in VM operation queue") \ 406 \ 407 develop(bool, BailoutToInterpreterForThrows, false, \ 408 "Compiled methods which throws/catches exceptions will be " \ 409 "deopt and intp.") \ 410 \ 411 develop(bool, NoYieldsInMicrolock, false, \ 412 "Disable yields in microlock") \ 413 \ 414 develop(bool, TraceOopMapGeneration, false, \ 415 "Shows oopmap generation") \ 416 \ 417 product(bool, MethodFlushing, true, \ 418 "Reclamation of zombie and not-entrant methods") \ 419 \ 420 develop(bool, VerifyStack, false, \ 421 "Verify stack of each thread when it is entering a runtime call") \ 422 \ 423 develop(bool, ForceUnreachable, false, \ 424 "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \ 425 \ 426 notproduct(bool, StressDerivedPointers, false, \ 427 "Force scavenge when a derived pointers is detected on stack " \ 428 "after rtm call") \ 429 \ 430 develop(bool, TraceDerivedPointers, false, \ 431 "Trace traversal of derived pointers on stack") \ 432 \ 433 notproduct(bool, TraceCodeBlobStacks, false, \ 434 "Trace stack-walk of codeblobs") \ 435 \ 436 product(bool, PrintJNIResolving, false, \ 437 "Used to implement -v:jni") \ 438 \ 439 notproduct(bool, PrintRewrites, false, \ 440 "Print methods that are being rewritten") \ 441 \ 442 product(bool, UseInlineCaches, true, \ 443 "Use Inline Caches for virtual calls ") \ 444 \ 445 develop(bool, InlineArrayCopy, true, \ 446 "inline arraycopy native that is known to be part of " \ 447 "base library DLL") \ 448 \ 449 develop(bool, InlineObjectHash, true, \ 450 "inline Object::hashCode() native that is known to be part " \ 451 "of base library DLL") \ 452 \ 453 develop(bool, InlineObjectCopy, true, \ 454 "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ 455 \ 456 develop(bool, InlineNatives, true, \ 457 "inline natives that are known to be part of base library DLL") \ 458 \ 459 develop(bool, InlineMathNatives, true, \ 460 "inline SinD, CosD, etc.") \ 461 \ 462 develop(bool, InlineClassNatives, true, \ 463 "inline Class.isInstance, etc") \ 464 \ 465 develop(bool, InlineAtomicLong, true, \ 466 "inline sun.misc.AtomicLong") \ 467 \ 468 develop(bool, InlineThreadNatives, true, \ 469 "inline Thread.currentThread, etc") \ 470 \ 471 develop(bool, InlineReflectionGetCallerClass, true, \ 472 "inline sun.reflect.Reflection.getCallerClass(), known to be part "\ 473 "of base library DLL") \ 474 \ 475 develop(bool, InlineUnsafeOps, true, \ 476 "inline memory ops (native methods) from sun.misc.Unsafe") \ 477 \ 478 develop(bool, ConvertCmpD2CmpF, true, \ 479 "Convert cmpD to cmpF when one input is constant in float range") \ 480 \ 481 develop(bool, ConvertFloat2IntClipping, true, \ 482 "Convert float2int clipping idiom to integer clipping") \ 483 \ 484 develop(bool, SpecialStringCompareTo, true, \ 485 "special version of string compareTo") \ 486 \ 487 develop(bool, SpecialStringIndexOf, true, \ 488 "special version of string indexOf") \ 489 \ 490 product(bool, SpecialArraysEquals, false, \ 491 "special version of Arrays.equals(char[],char[])") \ 492 \ 493 develop(bool, TraceCallFixup, false, \ 494 "traces all call fixups") \ 495 \ 496 develop(bool, DeoptimizeALot, false, \ 497 "deoptimize at every exit from the runtime system") \ 498 \ 499 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 500 "a comma separated list of bcis to deoptimize at") \ 501 \ 502 product(bool, DeoptimizeRandom, false, \ 503 "deoptimize random frames on random exit from the runtime system")\ 504 \ 505 notproduct(bool, ZombieALot, false, \ 506 "creates zombies (non-entrant) at exit from the runt. system") \ 507 \ 508 notproduct(bool, WalkStackALot, false, \ 509 "trace stack (no print) at every exit from the runtime system") \ 510 \ 511 develop(bool, Debugging, false, \ 512 "set when executing debug methods in debug.ccp " \ 513 "(to prevent triggering assertions)") \ 514 \ 515 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 516 "Enable strict checks that safepoints cannot happen for threads " \ 517 "that used No_Safepoint_Verifier") \ 518 \ 519 notproduct(bool, VerifyLastFrame, false, \ 520 "Verify oops on last frame on entry to VM") \ 521 \ 522 develop(bool, TraceHandleAllocation, false, \ 523 "Prints out warnings when suspicious many handles are allocated") \ 524 \ 525 product(bool, UseCompilerSafepoints, true, \ 526 "Stop at safepoints in compiled code") \ 527 \ 528 product(bool, UseSplitVerifier, true, \ 529 "use split verifier with StackMapTable attributes") \ 530 \ 531 product(bool, FailOverToOldVerifier, true, \ 532 "fail over to old verifier when split verifier fails") \ 533 \ 534 develop(bool, ShowSafepointMsgs, false, \ 535 "Show msg. about safepoint synch.") \ 536 \ 537 product(bool, SafepointTimeout, false, \ 538 "Time out and warn or fail after SafepointTimeoutDelay " \ 539 "milliseconds if failed to reach safepoint") \ 540 \ 541 develop(bool, DieOnSafepointTimeout, false, \ 542 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 543 \ 544 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 545 /* typically, at most a few retries are needed */ \ 546 product(intx, SuspendRetryCount, 50, \ 547 "Maximum retry count for an external suspend request") \ 548 \ 549 product(intx, SuspendRetryDelay, 5, \ 550 "Milliseconds to delay per retry (* current_retry_count)") \ 551 \ 552 product(bool, AssertOnSuspendWaitFailure, false, \ 553 "Assert/Guarantee on external suspend wait failure") \ 554 \ 555 product(bool, TraceSuspendWaitFailures, false, \ 556 "Trace external suspend wait failures") \ 557 \ 558 product(bool, MaxFDLimit, true, \ 559 "Bump the number of file descriptors to max in solaris.") \ 560 \ 561 notproduct(bool, LogEvents, trueInDebug, \ 562 "Enable Event log") \ 563 \ 564 product(bool, BytecodeVerificationRemote, true, \ 565 "Enables the Java bytecode verifier for remote classes") \ 566 \ 567 product(bool, BytecodeVerificationLocal, false, \ 568 "Enables the Java bytecode verifier for local classes") \ 569 \ 570 develop(bool, ForceFloatExceptions, trueInDebug, \ 571 "Force exceptions on FP stack under/overflow") \ 572 \ 573 develop(bool, SoftMatchFailure, trueInProduct, \ 574 "If the DFA fails to match a node, print a message and bail out") \ 575 \ 576 develop(bool, VerifyStackAtCalls, false, \ 577 "Verify that the stack pointer is unchanged after calls") \ 578 \ 579 develop(bool, TraceJavaAssertions, false, \ 580 "Trace java language assertions") \ 581 \ 582 notproduct(bool, CheckAssertionStatusDirectives, false, \ 583 "temporary - see javaClasses.cpp") \ 584 \ 585 notproduct(bool, PrintMallocFree, false, \ 586 "Trace calls to C heap malloc/free allocation") \ 587 \ 588 notproduct(bool, PrintOopAddress, false, \ 589 "Always print the location of the oop") \ 590 \ 591 notproduct(bool, VerifyCodeCacheOften, false, \ 592 "Verify compiled-code cache often") \ 593 \ 594 develop(bool, ZapDeadCompiledLocals, false, \ 595 "Zap dead locals in compiler frames") \ 596 \ 597 notproduct(bool, ZapDeadLocalsOld, false, \ 598 "Zap dead locals (old version, zaps all frames when " \ 599 "entering the VM") \ 600 \ 601 notproduct(bool, CheckOopishValues, false, \ 602 "Warn if value contains oop ( requires ZapDeadLocals)") \ 603 \ 604 develop(bool, UseMallocOnly, false, \ 605 "use only malloc/free for allocation (no resource area/arena)") \ 606 \ 607 develop(bool, PrintMalloc, false, \ 608 "print all malloc/free calls") \ 609 \ 610 develop(bool, ZapResourceArea, trueInDebug, \ 611 "Zap freed resource/arena space with 0xABABABAB") \ 612 \ 613 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 614 "Zap freed VM handle space with 0xBCBCBCBC") \ 615 \ 616 develop(bool, ZapJNIHandleArea, trueInDebug, \ 617 "Zap freed JNI handle space with 0xFEFEFEFE") \ 618 \ 619 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 620 "Zap unused heap space with 0xBAADBABE") \ 621 \ 622 develop(bool, TraceZapUnusedHeapArea, false, \ 623 "Trace zapping of unused heap space") \ 624 \ 625 develop(bool, CheckZapUnusedHeapArea, false, \ 626 "Check zapping of unused heap space") \ 627 \ 628 develop(bool, ZapFillerObjects, trueInDebug, \ 629 "Zap filler objects with 0xDEAFBABE") \ 630 \ 631 develop(bool, PrintVMMessages, true, \ 632 "Print vm messages on console") \ 633 \ 634 product(bool, PrintGCApplicationConcurrentTime, false, \ 635 "Print the time the application has been running") \ 636 \ 637 product(bool, PrintGCApplicationStoppedTime, false, \ 638 "Print the time the application has been stopped") \ 639 \ 640 develop(bool, Verbose, false, \ 641 "Prints additional debugging information from other modes") \ 642 \ 643 develop(bool, PrintMiscellaneous, false, \ 644 "Prints uncategorized debugging information (requires +Verbose)") \ 645 \ 646 develop(bool, WizardMode, false, \ 647 "Prints much more debugging information") \ 648 \ 649 product(bool, ShowMessageBoxOnError, false, \ 650 "Keep process alive on VM fatal error") \ 651 \ 652 product_pd(bool, UseOSErrorReporting, \ 653 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 654 \ 655 product(bool, SuppressFatalErrorMessage, false, \ 656 "Do NO Fatal Error report [Avoid deadlock]") \ 657 \ 658 product(ccstrlist, OnError, "", \ 659 "Run user-defined commands on fatal error; see VMError.cpp " \ 660 "for examples") \ 661 \ 662 product(ccstrlist, OnOutOfMemoryError, "", \ 663 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 664 \ 665 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 666 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 667 \ 668 manageable(ccstr, HeapDumpPath, NULL, \ 669 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 670 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 671 "in the working directory)") \ 672 \ 673 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 674 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 675 "when the heap usage is larger than this") \ 676 \ 677 develop(uintx, HeapDumpSegmentSize, 1*G, \ 678 "Approximate segment size when generating a segmented heap dump") \ 679 \ 680 develop(bool, BreakAtWarning, false, \ 681 "Execute breakpoint upon encountering VM warning") \ 682 \ 683 product_pd(bool, UseVectoredExceptions, \ 684 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ 685 \ 686 develop(bool, TraceVMOperation, false, \ 687 "Trace vm operations") \ 688 \ 689 develop(bool, UseFakeTimers, false, \ 690 "Tells whether the VM should use system time or a fake timer") \ 691 \ 692 diagnostic(bool, LogCompilation, false, \ 693 "Log compilation activity in detail to hotspot.log or LogFile") \ 694 \ 695 product(bool, PrintCompilation, false, \ 696 "Print compilations") \ 697 \ 698 diagnostic(bool, TraceNMethodInstalls, false, \ 699 "Trace nmethod intallation") \ 700 \ 701 diagnostic(bool, TraceOSRBreakpoint, false, \ 702 "Trace OSR Breakpoint ") \ 703 \ 704 diagnostic(bool, TraceCompileTriggered, false, \ 705 "Trace compile triggered") \ 706 \ 707 diagnostic(bool, TraceTriggers, false, \ 708 "Trace triggers") \ 709 \ 710 product(bool, AlwaysRestoreFPU, false, \ 711 "Restore the FPU control word after every JNI call (expensive)") \ 712 \ 713 notproduct(bool, PrintCompilation2, false, \ 714 "Print additional statistics per compilation") \ 715 \ 716 diagnostic(bool, PrintAdapterHandlers, false, \ 717 "Print code generated for i2c/c2i adapters") \ 718 \ 719 diagnostic(bool, PrintAssembly, false, \ 720 "Print assembly code (using external disassembler.so)") \ 721 \ 722 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 723 "Options string passed to disassembler.so") \ 724 \ 725 diagnostic(bool, PrintNMethods, false, \ 726 "Print assembly code for nmethods when generated") \ 727 \ 728 diagnostic(bool, PrintNativeNMethods, false, \ 729 "Print assembly code for native nmethods when generated") \ 730 \ 731 develop(bool, PrintDebugInfo, false, \ 732 "Print debug information for all nmethods when generated") \ 733 \ 734 develop(bool, PrintRelocations, false, \ 735 "Print relocation information for all nmethods when generated") \ 736 \ 737 develop(bool, PrintDependencies, false, \ 738 "Print dependency information for all nmethods when generated") \ 739 \ 740 develop(bool, PrintExceptionHandlers, false, \ 741 "Print exception handler tables for all nmethods when generated") \ 742 \ 743 develop(bool, InterceptOSException, false, \ 744 "Starts debugger when an implicit OS (e.g., NULL) " \ 745 "exception happens") \ 746 \ 747 notproduct(bool, PrintCodeCache, false, \ 748 "Print the compiled_code cache when exiting") \ 749 \ 750 develop(bool, PrintCodeCache2, false, \ 751 "Print detailed info on the compiled_code cache when exiting") \ 752 \ 753 diagnostic(bool, PrintStubCode, false, \ 754 "Print generated stub code") \ 755 \ 756 product(bool, StackTraceInThrowable, true, \ 757 "Collect backtrace in throwable when exception happens") \ 758 \ 759 product(bool, OmitStackTraceInFastThrow, true, \ 760 "Omit backtraces for some 'hot' exceptions in optimized code") \ 761 \ 762 product(bool, ProfilerPrintByteCodeStatistics, false, \ 763 "Prints byte code statictics when dumping profiler output") \ 764 \ 765 product(bool, ProfilerRecordPC, false, \ 766 "Collects tick for each 16 byte interval of compiled code") \ 767 \ 768 product(bool, ProfileVM, false, \ 769 "Profiles ticks that fall within VM (either in the VM Thread " \ 770 "or VM code called through stubs)") \ 771 \ 772 product(bool, ProfileIntervals, false, \ 773 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 774 \ 775 notproduct(bool, ProfilerCheckIntervals, false, \ 776 "Collect and print info on spacing of profiler ticks") \ 777 \ 778 develop(bool, PrintJVMWarnings, false, \ 779 "Prints warnings for unimplemented JVM functions") \ 780 \ 781 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 782 "Prints warnings for stalled SpinLocks") \ 783 \ 784 develop(bool, InitializeJavaLangSystem, true, \ 785 "Initialize java.lang.System - turn off for individual " \ 786 "method debugging") \ 787 \ 788 develop(bool, InitializeJavaLangString, true, \ 789 "Initialize java.lang.String - turn off for individual " \ 790 "method debugging") \ 791 \ 792 develop(bool, InitializeJavaLangExceptionsErrors, true, \ 793 "Initialize various error and exception classes - turn off for " \ 794 "individual method debugging") \ 795 \ 796 product(bool, RegisterFinalizersAtInit, true, \ 797 "Register finalizable objects at end of Object.<init> or " \ 798 "after allocation.") \ 799 \ 800 develop(bool, RegisterReferences, true, \ 801 "Tells whether the VM should register soft/weak/final/phantom " \ 802 "references") \ 803 \ 804 develop(bool, IgnoreRewrites, false, \ 805 "Supress rewrites of bytecodes in the oopmap generator. " \ 806 "This is unsafe!") \ 807 \ 808 develop(bool, PrintCodeCacheExtension, false, \ 809 "Print extension of code cache") \ 810 \ 811 develop(bool, UsePrivilegedStack, true, \ 812 "Enable the security JVM functions") \ 813 \ 814 develop(bool, IEEEPrecision, true, \ 815 "Enables IEEE precision (for INTEL only)") \ 816 \ 817 develop(bool, ProtectionDomainVerification, true, \ 818 "Verifies protection domain before resolution in system " \ 819 "dictionary") \ 820 \ 821 product(bool, ClassUnloading, true, \ 822 "Do unloading of classes") \ 823 \ 824 diagnostic(bool, LinkWellKnownClasses, false, \ 825 "Resolve a well known class as soon as its name is seen") \ 826 \ 827 develop(bool, DisableStartThread, false, \ 828 "Disable starting of additional Java threads " \ 829 "(for debugging only)") \ 830 \ 831 develop(bool, MemProfiling, false, \ 832 "Write memory usage profiling to log file") \ 833 \ 834 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 835 "Prints the system dictionary at exit") \ 836 \ 837 diagnostic(bool, UnsyncloadClass, false, \ 838 "Unstable: VM calls loadClass unsynchronized. Custom classloader "\ 839 "must call VM synchronized for findClass & defineClass") \ 840 \ 841 product_pd(bool, DontYieldALot, \ 842 "Throw away obvious excess yield calls (for SOLARIS only)") \ 843 \ 844 product_pd(bool, ConvertSleepToYield, \ 845 "Converts sleep(0) to thread yield " \ 846 "(may be off for SOLARIS to improve GUI)") \ 847 \ 848 product(bool, ConvertYieldToSleep, false, \ 849 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 850 "behavior (SOLARIS only)") \ 851 \ 852 product(bool, UseBoundThreads, true, \ 853 "Bind user level threads to kernel threads (for SOLARIS only)") \ 854 \ 855 develop(bool, UseDetachedThreads, true, \ 856 "Use detached threads that are recycled upon termination " \ 857 "(for SOLARIS only)") \ 858 \ 859 product(bool, UseLWPSynchronization, true, \ 860 "Use LWP-based instead of libthread-based synchronization " \ 861 "(SPARC only)") \ 862 \ 863 product(ccstr, SyncKnobs, NULL, \ 864 "(Unstable) Various monitor synchronization tunables") \ 865 \ 866 product(intx, EmitSync, 0, \ 867 "(Unsafe,Unstable) " \ 868 " Controls emission of inline sync fast-path code") \ 869 \ 870 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ 871 \ 872 product(intx, Atomics, 0, \ 873 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ 874 \ 875 product(intx, FenceInstruction, 0, \ 876 "(Unsafe,Unstable) Experimental") \ 877 \ 878 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 879 \ 880 product(intx, SyncVerbose, 0, "(Unstable)" ) \ 881 \ 882 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 883 \ 884 product(intx, hashCode, 0, \ 885 "(Unstable) select hashCode generation algorithm" ) \ 886 \ 887 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 888 "(Unstable, Linux-specific)" \ 889 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 890 \ 891 product(bool, FilterSpuriousWakeups , true, \ 892 "Prevent spurious or premature wakeups from object.wait" \ 893 "(Solaris only)") \ 894 \ 895 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 896 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 897 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 898 \ 899 develop(bool, UsePthreads, false, \ 900 "Use pthread-based instead of libthread-based synchronization " \ 901 "(SPARC only)") \ 902 \ 903 product(bool, AdjustConcurrency, false, \ 904 "call thr_setconcurrency at thread create time to avoid " \ 905 "LWP starvation on MP systems (For Solaris Only)") \ 906 \ 907 develop(bool, UpdateHotSpotCompilerFileOnError, true, \ 908 "Should the system attempt to update the compiler file when " \ 909 "an error occurs?") \ 910 \ 911 product(bool, ReduceSignalUsage, false, \ 912 "Reduce the use of OS signals in Java and/or the VM") \ 913 \ 914 notproduct(bool, ValidateMarkSweep, false, \ 915 "Do extra validation during MarkSweep collection") \ 916 \ 917 notproduct(bool, RecordMarkSweepCompaction, false, \ 918 "Enable GC-to-GC recording and querying of compaction during " \ 919 "MarkSweep") \ 920 \ 921 develop_pd(bool, ShareVtableStubs, \ 922 "Share vtable stubs (smaller code but worse branch prediction") \ 923 \ 924 develop(bool, LoadLineNumberTables, true, \ 925 "Tells whether the class file parser loads line number tables") \ 926 \ 927 develop(bool, LoadLocalVariableTables, true, \ 928 "Tells whether the class file parser loads local variable tables")\ 929 \ 930 develop(bool, LoadLocalVariableTypeTables, true, \ 931 "Tells whether the class file parser loads local variable type tables")\ 932 \ 933 product(bool, AllowUserSignalHandlers, false, \ 934 "Do not complain if the application installs signal handlers " \ 935 "(Solaris & Linux only)") \ 936 \ 937 product(bool, UseSignalChaining, true, \ 938 "Use signal-chaining to invoke signal handlers installed " \ 939 "by the application (Solaris & Linux only)") \ 940 \ 941 product(bool, UseAltSigs, false, \ 942 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 943 "internal signals. (Solaris only)") \ 944 \ 945 product(bool, UseSpinning, false, \ 946 "Use spinning in monitor inflation and before entry") \ 947 \ 948 product(bool, PreSpinYield, false, \ 949 "Yield before inner spinning loop") \ 950 \ 951 product(bool, PostSpinYield, true, \ 952 "Yield after inner spinning loop") \ 953 \ 954 product(bool, AllowJNIEnvProxy, false, \ 955 "Allow JNIEnv proxies for jdbx") \ 956 \ 957 product(bool, JNIDetachReleasesMonitors, true, \ 958 "JNI DetachCurrentThread releases monitors owned by thread") \ 959 \ 960 product(bool, RestoreMXCSROnJNICalls, false, \ 961 "Restore MXCSR when returning from JNI calls") \ 962 \ 963 product(bool, CheckJNICalls, false, \ 964 "Verify all arguments to JNI calls") \ 965 \ 966 product(bool, UseFastJNIAccessors, true, \ 967 "Use optimized versions of Get<Primitive>Field") \ 968 \ 969 product(bool, EagerXrunInit, false, \ 970 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 971 " but not all -Xrun libraries may support the state of the VM at this time") \ 972 \ 973 product(bool, PreserveAllAnnotations, false, \ 974 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 975 \ 976 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 977 "Number of OutOfMemoryErrors preallocated with backtrace") \ 978 \ 979 product(bool, LazyBootClassLoader, true, \ 980 "Enable/disable lazy opening of boot class path entries") \ 981 \ 982 diagnostic(bool, UseIncDec, true, \ 983 "Use INC, DEC instructions on x86") \ 984 \ 985 product(bool, UseNewLongLShift, false, \ 986 "Use optimized bitwise shift left") \ 987 \ 988 product(bool, UseStoreImmI16, true, \ 989 "Use store immediate 16-bits value instruction on x86") \ 990 \ 991 product(bool, UseAddressNop, false, \ 992 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 993 \ 994 product(bool, UseXmmLoadAndClearUpper, true, \ 995 "Load low part of XMM register and clear upper part") \ 996 \ 997 product(bool, UseXmmRegToRegMoveAll, false, \ 998 "Copy all XMM register bits when moving value between registers") \ 999 \ 1000 product(bool, UseXmmI2D, false, \ 1001 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 1002 \ 1003 product(bool, UseXmmI2F, false, \ 1004 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 1005 \ 1006 product(bool, UseXMMForArrayCopy, false, \ 1007 "Use SSE2 MOVQ instruction for Arraycopy") \ 1008 \ 1009 product(bool, UseUnalignedLoadStores, false, \ 1010 "Use SSE2 MOVDQU instruction for Arraycopy") \ 1011 \ 1012 product(intx, FieldsAllocationStyle, 1, \ 1013 "0 - type based with oops first, 1 - with oops last") \ 1014 \ 1015 product(bool, CompactFields, true, \ 1016 "Allocate nonstatic fields in gaps between previous fields") \ 1017 \ 1018 notproduct(bool, PrintCompactFieldsSavings, false, \ 1019 "Print how many words were saved with CompactFields") \ 1020 \ 1021 product(bool, UseBiasedLocking, true, \ 1022 "Enable biased locking in JVM") \ 1023 \ 1024 product(intx, BiasedLockingStartupDelay, 4000, \ 1025 "Number of milliseconds to wait before enabling biased locking") \ 1026 \ 1027 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1028 "Print statistics of biased locking in JVM") \ 1029 \ 1030 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1031 "Threshold of number of revocations per type to try to " \ 1032 "rebias all objects in the heap of that type") \ 1033 \ 1034 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1035 "Threshold of number of revocations per type to permanently " \ 1036 "revoke biases of all objects in the heap of that type") \ 1037 \ 1038 product(intx, BiasedLockingDecayTime, 25000, \ 1039 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1040 "type after previous bulk rebias") \ 1041 \ 1042 /* tracing */ \ 1043 \ 1044 notproduct(bool, TraceRuntimeCalls, false, \ 1045 "Trace run-time calls") \ 1046 \ 1047 develop(bool, TraceJNICalls, false, \ 1048 "Trace JNI calls") \ 1049 \ 1050 notproduct(bool, TraceJVMCalls, false, \ 1051 "Trace JVM calls") \ 1052 \ 1053 product(ccstr, TraceJVMTI, NULL, \ 1054 "Trace flags for JVMTI functions and events") \ 1055 \ 1056 /* This option can change an EMCP method into an obsolete method. */ \ 1057 /* This can affect tests that except specific methods to be EMCP. */ \ 1058 /* This option should be used with caution. */ \ 1059 product(bool, StressLdcRewrite, false, \ 1060 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1061 \ 1062 product(intx, TraceRedefineClasses, 0, \ 1063 "Trace level for JVMTI RedefineClasses") \ 1064 \ 1065 /* change to false by default sometime after Mustang */ \ 1066 product(bool, VerifyMergedCPBytecodes, true, \ 1067 "Verify bytecodes after RedefineClasses constant pool merging") \ 1068 \ 1069 develop(bool, TraceJNIHandleAllocation, false, \ 1070 "Trace allocation/deallocation of JNI handle blocks") \ 1071 \ 1072 develop(bool, TraceThreadEvents, false, \ 1073 "Trace all thread events") \ 1074 \ 1075 develop(bool, TraceBytecodes, false, \ 1076 "Trace bytecode execution") \ 1077 \ 1078 develop(bool, TraceClassInitialization, false, \ 1079 "Trace class initialization") \ 1080 \ 1081 develop(bool, TraceExceptions, false, \ 1082 "Trace exceptions") \ 1083 \ 1084 develop(bool, TraceICs, false, \ 1085 "Trace inline cache changes") \ 1086 \ 1087 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1088 "Trace method invocation counter overflow") \ 1089 \ 1090 develop(bool, TraceInlineCacheClearing, false, \ 1091 "Trace clearing of inline caches in nmethods") \ 1092 \ 1093 develop(bool, TraceDependencies, false, \ 1094 "Trace dependencies") \ 1095 \ 1096 develop(bool, VerifyDependencies, trueInDebug, \ 1097 "Exercise and verify the compilation dependency mechanism") \ 1098 \ 1099 develop(bool, TraceNewOopMapGeneration, false, \ 1100 "Trace OopMapGeneration") \ 1101 \ 1102 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1103 "Trace OopMapGeneration: print detailed cell states") \ 1104 \ 1105 develop(bool, TimeOopMap, false, \ 1106 "Time calls to GenerateOopMap::compute_map() in sum") \ 1107 \ 1108 develop(bool, TimeOopMap2, false, \ 1109 "Time calls to GenerateOopMap::compute_map() individually") \ 1110 \ 1111 develop(bool, TraceMonitorMismatch, false, \ 1112 "Trace monitor matching failures during OopMapGeneration") \ 1113 \ 1114 develop(bool, TraceOopMapRewrites, false, \ 1115 "Trace rewritting of method oops during oop map generation") \ 1116 \ 1117 develop(bool, TraceSafepoint, false, \ 1118 "Trace safepoint operations") \ 1119 \ 1120 develop(bool, TraceICBuffer, false, \ 1121 "Trace usage of IC buffer") \ 1122 \ 1123 develop(bool, TraceCompiledIC, false, \ 1124 "Trace changes of compiled IC") \ 1125 \ 1126 notproduct(bool, TraceZapDeadLocals, false, \ 1127 "Trace zapping dead locals") \ 1128 \ 1129 develop(bool, TraceStartupTime, false, \ 1130 "Trace setup time") \ 1131 \ 1132 develop(bool, TraceHPI, false, \ 1133 "Trace Host Porting Interface (HPI)") \ 1134 \ 1135 product(ccstr, HPILibPath, NULL, \ 1136 "Specify alternate path to HPI library") \ 1137 \ 1138 develop(bool, TraceProtectionDomainVerification, false, \ 1139 "Trace protection domain verifcation") \ 1140 \ 1141 develop(bool, TraceClearedExceptions, false, \ 1142 "Prints when an exception is forcibly cleared") \ 1143 \ 1144 product(bool, TraceClassResolution, false, \ 1145 "Trace all constant pool resolutions (for debugging)") \ 1146 \ 1147 product(bool, TraceBiasedLocking, false, \ 1148 "Trace biased locking in JVM") \ 1149 \ 1150 product(bool, TraceMonitorInflation, false, \ 1151 "Trace monitor inflation in JVM") \ 1152 \ 1153 /* assembler */ \ 1154 product(bool, Use486InstrsOnly, false, \ 1155 "Use 80486 Compliant instruction subset") \ 1156 \ 1157 /* gc */ \ 1158 \ 1159 product(bool, UseSerialGC, false, \ 1160 "Use the serial garbage collector") \ 1161 \ 1162 experimental(bool, UseG1GC, false, \ 1163 "Use the Garbage-First garbage collector") \ 1164 \ 1165 product(bool, UseParallelGC, false, \ 1166 "Use the Parallel Scavenge garbage collector") \ 1167 \ 1168 product(bool, UseParallelOldGC, false, \ 1169 "Use the Parallel Old garbage collector") \ 1170 \ 1171 product(bool, UseParallelOldGCCompacting, true, \ 1172 "In the Parallel Old garbage collector use parallel compaction") \ 1173 \ 1174 product(bool, UseParallelDensePrefixUpdate, true, \ 1175 "In the Parallel Old garbage collector use parallel dense" \ 1176 " prefix update") \ 1177 \ 1178 product(uintx, HeapMaximumCompactionInterval, 20, \ 1179 "How often should we maximally compact the heap (not allowing " \ 1180 "any dead space)") \ 1181 \ 1182 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1183 "The collection count for the first maximum compaction") \ 1184 \ 1185 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1186 "In the Parallel Old garbage collector maximum compaction for " \ 1187 "a system GC") \ 1188 \ 1189 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1190 "The mean used by the par compact dead wood" \ 1191 "limiter (a number between 0-100).") \ 1192 \ 1193 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1194 "The standard deviation used by the par compact dead wood" \ 1195 "limiter (a number between 0-100).") \ 1196 \ 1197 product(bool, UseParallelOldGCDensePrefix, true, \ 1198 "Use a dense prefix with the Parallel Old garbage collector") \ 1199 \ 1200 product(uintx, ParallelGCThreads, 0, \ 1201 "Number of parallel threads parallel gc will use") \ 1202 \ 1203 product(uintx, ParallelCMSThreads, 0, \ 1204 "Max number of threads CMS will use for concurrent work") \ 1205 \ 1206 develop(bool, ParallelOldGCSplitALot, false, \ 1207 "Provoke splitting (copying data from a young gen space to" \ 1208 "multiple destination spaces)") \ 1209 \ 1210 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1211 "How often to provoke splitting a young gen space") \ 1212 \ 1213 develop(bool, TraceRegionTasksQueuing, false, \ 1214 "Trace the queuing of the region tasks") \ 1215 \ 1216 product(uintx, ParallelMarkingThreads, 0, \ 1217 "Number of marking threads concurrent gc will use") \ 1218 \ 1219 product(uintx, YoungPLABSize, 4096, \ 1220 "Size of young gen promotion labs (in HeapWords)") \ 1221 \ 1222 product(uintx, OldPLABSize, 1024, \ 1223 "Size of old gen promotion labs (in HeapWords)") \ 1224 \ 1225 product(uintx, GCTaskTimeStampEntries, 200, \ 1226 "Number of time stamp entries per gc worker thread") \ 1227 \ 1228 product(bool, AlwaysTenure, false, \ 1229 "Always tenure objects in eden. (ParallelGC only)") \ 1230 \ 1231 product(bool, NeverTenure, false, \ 1232 "Never tenure objects in eden, May tenure on overflow" \ 1233 " (ParallelGC only)") \ 1234 \ 1235 product(bool, ScavengeBeforeFullGC, true, \ 1236 "Scavenge youngest generation before each full GC," \ 1237 " used with UseParallelGC") \ 1238 \ 1239 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1240 "Allow scavenges to occur when to_space contains objects.") \ 1241 \ 1242 product(bool, UseConcMarkSweepGC, false, \ 1243 "Use Concurrent Mark-Sweep GC in the old generation") \ 1244 \ 1245 product(bool, ExplicitGCInvokesConcurrent, false, \ 1246 "A System.gc() request invokes a concurrent collection;" \ 1247 " (effective only when UseConcMarkSweepGC)") \ 1248 \ 1249 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1250 "A System.gc() request invokes a concurrent collection and" \ 1251 " also unloads classes during such a concurrent gc cycle " \ 1252 " (effective only when UseConcMarkSweepGC)") \ 1253 \ 1254 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1255 "Use Adaptive Free Lists in the CMS generation") \ 1256 \ 1257 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1258 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1259 \ 1260 develop(bool, RotateCMSCollectionTypes, false, \ 1261 "Rotate the CMS collections among concurrent and STW") \ 1262 \ 1263 product(bool, UseCMSBestFit, true, \ 1264 "Use CMS best fit allocation strategy") \ 1265 \ 1266 product(bool, UseCMSCollectionPassing, true, \ 1267 "Use passing of collection from background to foreground") \ 1268 \ 1269 product(bool, UseParNewGC, false, \ 1270 "Use parallel threads in the new generation.") \ 1271 \ 1272 product(bool, ParallelGCVerbose, false, \ 1273 "Verbose output for parallel GC.") \ 1274 \ 1275 product(intx, ParallelGCBufferWastePct, 10, \ 1276 "wasted fraction of parallel allocation buffer.") \ 1277 \ 1278 product(bool, ParallelGCRetainPLAB, true, \ 1279 "Retain parallel allocation buffers across scavenges.") \ 1280 \ 1281 product(intx, TargetPLABWastePct, 10, \ 1282 "target wasted space in last buffer as pct of overall allocation")\ 1283 \ 1284 product(uintx, PLABWeight, 75, \ 1285 "Percentage (0-100) used to weight the current sample when" \ 1286 "computing exponentially decaying average for ResizePLAB.") \ 1287 \ 1288 product(bool, ResizePLAB, true, \ 1289 "Dynamically resize (survivor space) promotion labs") \ 1290 \ 1291 product(bool, PrintPLAB, false, \ 1292 "Print (survivor space) promotion labs sizing decisions") \ 1293 \ 1294 product(intx, ParGCArrayScanChunk, 50, \ 1295 "Scan a subset and push remainder, if array is bigger than this") \ 1296 \ 1297 product(intx, ParGCDesiredObjsFromOverflowList, 20, \ 1298 "The desired number of objects to claim from the overflow list") \ 1299 \ 1300 product(uintx, CMSParPromoteBlocksToClaim, 50, \ 1301 "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1302 "parallel GC.") \ 1303 \ 1304 product(bool, AlwaysPreTouch, false, \ 1305 "It forces all freshly committed pages to be pre-touched.") \ 1306 \ 1307 product(bool, CMSUseOldDefaults, false, \ 1308 "A flag temporarily introduced to allow reverting to some older" \ 1309 "default settings; older as of 6.0 ") \ 1310 \ 1311 product(intx, CMSYoungGenPerWorker, 16*M, \ 1312 "The amount of young gen chosen by default per GC worker " \ 1313 "thread available ") \ 1314 \ 1315 product(bool, GCOverheadReporting, false, \ 1316 "Enables the GC overhead reporting facility") \ 1317 \ 1318 product(intx, GCOverheadReportingPeriodMS, 100, \ 1319 "Reporting period for conc GC overhead reporting, in ms ") \ 1320 \ 1321 product(bool, CMSIncrementalMode, false, \ 1322 "Whether CMS GC should operate in \"incremental\" mode") \ 1323 \ 1324 product(uintx, CMSIncrementalDutyCycle, 10, \ 1325 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1326 "CMSIncrementalPacing is enabled, then this is just the initial" \ 1327 "value") \ 1328 \ 1329 product(bool, CMSIncrementalPacing, true, \ 1330 "Whether the CMS incremental mode duty cycle should be " \ 1331 "automatically adjusted") \ 1332 \ 1333 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1334 "Lower bound on the duty cycle when CMSIncrementalPacing is" \ 1335 "enabled (a percentage, 0-100).") \ 1336 \ 1337 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1338 "Percentage (0-100) used to add conservatism when computing the" \ 1339 "duty cycle.") \ 1340 \ 1341 product(uintx, CMSIncrementalOffset, 0, \ 1342 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1343 "is shifted to the right within the period between young GCs") \ 1344 \ 1345 product(uintx, CMSExpAvgFactor, 25, \ 1346 "Percentage (0-100) used to weight the current sample when" \ 1347 "computing exponential averages for CMS statistics.") \ 1348 \ 1349 product(uintx, CMS_FLSWeight, 50, \ 1350 "Percentage (0-100) used to weight the current sample when" \ 1351 "computing exponentially decating averages for CMS FLS statistics.") \ 1352 \ 1353 product(uintx, CMS_FLSPadding, 2, \ 1354 "The multiple of deviation from mean to use for buffering" \ 1355 "against volatility in free list demand.") \ 1356 \ 1357 product(uintx, FLSCoalescePolicy, 2, \ 1358 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1359 \ 1360 product(uintx, CMS_SweepWeight, 50, \ 1361 "Percentage (0-100) used to weight the current sample when" \ 1362 "computing exponentially decaying average for inter-sweep duration.") \ 1363 \ 1364 product(uintx, CMS_SweepPadding, 2, \ 1365 "The multiple of deviation from mean to use for buffering" \ 1366 "against volatility in inter-sweep duration.") \ 1367 \ 1368 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1369 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1370 " duration exceeds this threhold in milliseconds") \ 1371 \ 1372 develop(bool, CMSTraceIncrementalMode, false, \ 1373 "Trace CMS incremental mode") \ 1374 \ 1375 develop(bool, CMSTraceIncrementalPacing, false, \ 1376 "Trace CMS incremental mode pacing computation") \ 1377 \ 1378 develop(bool, CMSTraceThreadState, false, \ 1379 "Trace the CMS thread state (enable the trace_state() method)") \ 1380 \ 1381 product(bool, CMSClassUnloadingEnabled, false, \ 1382 "Whether class unloading enabled when using CMS GC") \ 1383 \ 1384 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1385 "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1386 " for which classes may not be unloaded") \ 1387 \ 1388 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1389 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1390 \ 1391 product(bool, UseCMSCompactAtFullCollection, true, \ 1392 "Use mark sweep compact at full collections") \ 1393 \ 1394 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1395 "Number of CMS full collection done before compaction if > 0") \ 1396 \ 1397 develop(intx, CMSDictionaryChoice, 0, \ 1398 "Use BinaryTreeDictionary as default in the CMS generation") \ 1399 \ 1400 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1401 "Replenish and indexed free list with this number of chunks") \ 1402 \ 1403 product(bool, CMSLoopWarn, false, \ 1404 "Warn in case of excessive CMS looping") \ 1405 \ 1406 develop(bool, CMSOverflowEarlyRestoration, false, \ 1407 "Whether preserved marks should be restored early") \ 1408 \ 1409 product(uintx, CMSMarkStackSize, 32*K, \ 1410 "Size of CMS marking stack") \ 1411 \ 1412 product(uintx, CMSMarkStackSizeMax, 4*M, \ 1413 "Max size of CMS marking stack") \ 1414 \ 1415 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1416 "Whether we should simulate frequent marking stack / work queue" \ 1417 " overflow") \ 1418 \ 1419 notproduct(intx, CMSMarkStackOverflowInterval, 1000, \ 1420 "A per-thread `interval' counter that determines how frequently" \ 1421 " we simulate overflow; a smaller number increases frequency") \ 1422 \ 1423 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1424 "(Temporary, subject to experimentation)" \ 1425 "Maximum number of abortable preclean iterations, if > 0") \ 1426 \ 1427 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1428 "(Temporary, subject to experimentation)" \ 1429 "Maximum time in abortable preclean in ms") \ 1430 \ 1431 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1432 "(Temporary, subject to experimentation)" \ 1433 "Nominal minimum work per abortable preclean iteration") \ 1434 \ 1435 product(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1436 "(Temporary, subject to experimentation)" \ 1437 " Time that we sleep between iterations when not given" \ 1438 " enough work per iteration") \ 1439 \ 1440 product(uintx, CMSRescanMultiple, 32, \ 1441 "Size (in cards) of CMS parallel rescan task") \ 1442 \ 1443 product(uintx, CMSConcMarkMultiple, 32, \ 1444 "Size (in cards) of CMS concurrent MT marking task") \ 1445 \ 1446 product(uintx, CMSRevisitStackSize, 1*M, \ 1447 "Size of CMS KlassKlass revisit stack") \ 1448 \ 1449 product(bool, CMSAbortSemantics, false, \ 1450 "Whether abort-on-overflow semantics is implemented") \ 1451 \ 1452 product(bool, CMSParallelRemarkEnabled, true, \ 1453 "Whether parallel remark enabled (only if ParNewGC)") \ 1454 \ 1455 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1456 "Whether parallel remark of survivor space" \ 1457 " enabled (effective only if CMSParallelRemarkEnabled)") \ 1458 \ 1459 product(bool, CMSPLABRecordAlways, true, \ 1460 "Whether to always record survivor space PLAB bdries" \ 1461 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1462 \ 1463 product(bool, CMSConcurrentMTEnabled, true, \ 1464 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1465 \ 1466 product(bool, CMSPermGenPrecleaningEnabled, true, \ 1467 "Whether concurrent precleaning enabled in perm gen" \ 1468 " (effective only when CMSPrecleaningEnabled is true)") \ 1469 \ 1470 product(bool, CMSPrecleaningEnabled, true, \ 1471 "Whether concurrent precleaning enabled") \ 1472 \ 1473 product(uintx, CMSPrecleanIter, 3, \ 1474 "Maximum number of precleaning iteration passes") \ 1475 \ 1476 product(uintx, CMSPrecleanNumerator, 2, \ 1477 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1478 " ratio") \ 1479 \ 1480 product(uintx, CMSPrecleanDenominator, 3, \ 1481 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1482 " ratio") \ 1483 \ 1484 product(bool, CMSPrecleanRefLists1, true, \ 1485 "Preclean ref lists during (initial) preclean phase") \ 1486 \ 1487 product(bool, CMSPrecleanRefLists2, false, \ 1488 "Preclean ref lists during abortable preclean phase") \ 1489 \ 1490 product(bool, CMSPrecleanSurvivors1, false, \ 1491 "Preclean survivors during (initial) preclean phase") \ 1492 \ 1493 product(bool, CMSPrecleanSurvivors2, true, \ 1494 "Preclean survivors during abortable preclean phase") \ 1495 \ 1496 product(uintx, CMSPrecleanThreshold, 1000, \ 1497 "Don't re-iterate if #dirty cards less than this") \ 1498 \ 1499 product(bool, CMSCleanOnEnter, true, \ 1500 "Clean-on-enter optimization for reducing number of dirty cards") \ 1501 \ 1502 product(uintx, CMSRemarkVerifyVariant, 1, \ 1503 "Choose variant (1,2) of verification following remark") \ 1504 \ 1505 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1506 "If Eden used is below this value, don't try to schedule remark") \ 1507 \ 1508 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1509 "The Eden occupancy % at which to try and schedule remark pause") \ 1510 \ 1511 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1512 "Start sampling Eden top at least before yg occupancy reaches" \ 1513 " 1/<ratio> of the size at which we plan to schedule remark") \ 1514 \ 1515 product(uintx, CMSSamplingGrain, 16*K, \ 1516 "The minimum distance between eden samples for CMS (see above)") \ 1517 \ 1518 product(bool, CMSScavengeBeforeRemark, false, \ 1519 "Attempt scavenge before the CMS remark step") \ 1520 \ 1521 develop(bool, CMSTraceSweeper, false, \ 1522 "Trace some actions of the CMS sweeper") \ 1523 \ 1524 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1525 "Don't drain below this size per parallel worker/thief") \ 1526 \ 1527 product(intx, CMSWaitDuration, 2000, \ 1528 "Time in milliseconds that CMS thread waits for young GC") \ 1529 \ 1530 product(bool, CMSYield, true, \ 1531 "Yield between steps of concurrent mark & sweep") \ 1532 \ 1533 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1534 "Bitmap operations should process at most this many bits" \ 1535 "between yields") \ 1536 \ 1537 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1538 "Verify that all refs across the FLS boundary " \ 1539 " are to valid objects") \ 1540 \ 1541 diagnostic(bool, FLSVerifyLists, false, \ 1542 "Do lots of (expensive) FreeListSpace verification") \ 1543 \ 1544 diagnostic(bool, FLSVerifyIndexTable, false, \ 1545 "Do lots of (expensive) FLS index table verification") \ 1546 \ 1547 develop(bool, FLSVerifyDictionary, false, \ 1548 "Do lots of (expensive) FLS dictionary verification") \ 1549 \ 1550 develop(bool, VerifyBlockOffsetArray, false, \ 1551 "Do (expensive!) block offset array verification") \ 1552 \ 1553 product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \ 1554 "Maintain _unallocated_block in BlockOffsetArray" \ 1555 " (currently applicable only to CMS collector)") \ 1556 \ 1557 develop(bool, TraceCMSState, false, \ 1558 "Trace the state of the CMS collection") \ 1559 \ 1560 product(intx, RefDiscoveryPolicy, 0, \ 1561 "Whether reference-based(0) or referent-based(1)") \ 1562 \ 1563 product(bool, ParallelRefProcEnabled, false, \ 1564 "Enable parallel reference processing whenever possible") \ 1565 \ 1566 product(bool, ParallelRefProcBalancingEnabled, true, \ 1567 "Enable balancing of reference processing queues") \ 1568 \ 1569 product(intx, CMSTriggerRatio, 80, \ 1570 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1571 " allocated before a CMS collection cycle commences") \ 1572 \ 1573 product(intx, CMSTriggerPermRatio, 80, \ 1574 "Percentage of MinHeapFreeRatio in the CMS perm generation that" \ 1575 " is allocated before a CMS collection cycle commences, that " \ 1576 " also collects the perm generation") \ 1577 \ 1578 product(uintx, CMSBootstrapOccupancy, 50, \ 1579 "Percentage CMS generation occupancy at which to " \ 1580 " initiate CMS collection for bootstrapping collection stats") \ 1581 \ 1582 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1583 "Percentage CMS generation occupancy to start a CMS collection " \ 1584 " cycle (A negative value means that CMSTriggerRatio is used)") \ 1585 \ 1586 product(intx, CMSInitiatingPermOccupancyFraction, -1, \ 1587 "Percentage CMS perm generation occupancy to start a CMScollection"\ 1588 " cycle (A negative value means that CMSTriggerPermRatio is used)")\ 1589 \ 1590 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1591 "Only use occupancy as a crierion for starting a CMS collection") \ 1592 \ 1593 product(intx, CMSIsTooFullPercentage, 98, \ 1594 "An absolute ceiling above which CMS will always consider the" \ 1595 " perm gen ripe for collection") \ 1596 \ 1597 develop(bool, CMSTestInFreeList, false, \ 1598 "Check if the coalesced range is already in the " \ 1599 "free lists as claimed.") \ 1600 \ 1601 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1602 "Check that all the garbage collected was returned to the " \ 1603 "free lists.") \ 1604 \ 1605 notproduct(bool, ScavengeALot, false, \ 1606 "Force scavenge at every Nth exit from the runtime system " \ 1607 "(N=ScavengeALotInterval)") \ 1608 \ 1609 develop(bool, FullGCALot, false, \ 1610 "Force full gc at every Nth exit from the runtime system " \ 1611 "(N=FullGCALotInterval)") \ 1612 \ 1613 notproduct(bool, GCALotAtAllSafepoints, false, \ 1614 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1615 \ 1616 product(bool, HandlePromotionFailure, true, \ 1617 "The youngest generation collection does not require" \ 1618 " a guarantee of full promotion of all live objects.") \ 1619 \ 1620 notproduct(bool, PromotionFailureALot, false, \ 1621 "Use promotion failure handling on every youngest generation " \ 1622 "collection") \ 1623 \ 1624 develop(uintx, PromotionFailureALotCount, 1000, \ 1625 "Number of promotion failures occurring at ParGCAllocBuffer" \ 1626 "refill attempts (ParNew) or promotion attempts " \ 1627 "(other young collectors) ") \ 1628 \ 1629 develop(uintx, PromotionFailureALotInterval, 5, \ 1630 "Total collections between promotion failures alot") \ 1631 \ 1632 develop(intx, WorkStealingSleepMillis, 1, \ 1633 "Sleep time when sleep is used for yields") \ 1634 \ 1635 develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \ 1636 "Number of yields before a sleep is done during workstealing") \ 1637 \ 1638 product(uintx, PreserveMarkStackSize, 40, \ 1639 "Size for stack used in promotion failure handling") \ 1640 \ 1641 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1642 \ 1643 product_pd(bool, ResizeTLAB, \ 1644 "Dynamically resize tlab size for threads") \ 1645 \ 1646 product(bool, ZeroTLAB, false, \ 1647 "Zero out the newly created TLAB") \ 1648 \ 1649 product(bool, FastTLABRefill, true, \ 1650 "Use fast TLAB refill code") \ 1651 \ 1652 product(bool, PrintTLAB, false, \ 1653 "Print various TLAB related information") \ 1654 \ 1655 product(bool, TLABStats, true, \ 1656 "Print various TLAB related information") \ 1657 \ 1658 product_pd(bool, NeverActAsServerClassMachine, \ 1659 "Never act like a server-class machine") \ 1660 \ 1661 product(bool, AlwaysActAsServerClassMachine, false, \ 1662 "Always act like a server-class machine") \ 1663 \ 1664 product_pd(uintx, DefaultMaxRAM, \ 1665 "Maximum real memory size for setting server class heap size") \ 1666 \ 1667 product(uintx, DefaultMaxRAMFraction, 4, \ 1668 "Fraction (1/n) of real memory used for server class max heap") \ 1669 \ 1670 product(uintx, DefaultInitialRAMFraction, 64, \ 1671 "Fraction (1/n) of real memory used for server class initial heap") \ 1672 \ 1673 product(bool, UseAutoGCSelectPolicy, false, \ 1674 "Use automatic collection selection policy") \ 1675 \ 1676 product(uintx, AutoGCSelectPauseMillis, 5000, \ 1677 "Automatic GC selection pause threshhold in ms") \ 1678 \ 1679 product(bool, UseAdaptiveSizePolicy, true, \ 1680 "Use adaptive generation sizing policies") \ 1681 \ 1682 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 1683 "Use adaptive survivor sizing policies") \ 1684 \ 1685 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 1686 "Use adaptive young-old sizing policies at minor collections") \ 1687 \ 1688 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 1689 "Use adaptive young-old sizing policies at major collections") \ 1690 \ 1691 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 1692 "Use statistics from System.GC for adaptive size policy") \ 1693 \ 1694 product(bool, UseAdaptiveGCBoundary, false, \ 1695 "Allow young-old boundary to move") \ 1696 \ 1697 develop(bool, TraceAdaptiveGCBoundary, false, \ 1698 "Trace young-old boundary moves") \ 1699 \ 1700 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 1701 "Resize the virtual spaces of the young or old generations") \ 1702 \ 1703 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 1704 "Policy for changeing generation size for throughput goals") \ 1705 \ 1706 product(uintx, AdaptiveSizePausePolicy, 0, \ 1707 "Policy for changing generation size for pause goals") \ 1708 \ 1709 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 1710 "Adjust tenured generation to achive a minor pause goal") \ 1711 \ 1712 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 1713 "Adjust young generation to achive a major pause goal") \ 1714 \ 1715 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 1716 "Number of steps where heuristics is used before data is used") \ 1717 \ 1718 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 1719 "Number of collections before the adaptive sizing is started") \ 1720 \ 1721 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 1722 "Collecton interval for printing information, zero => never") \ 1723 \ 1724 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 1725 "Use adaptive minimum footprint as a goal") \ 1726 \ 1727 product(uintx, AdaptiveSizePolicyWeight, 10, \ 1728 "Weight given to exponential resizing, between 0 and 100") \ 1729 \ 1730 product(uintx, AdaptiveTimeWeight, 25, \ 1731 "Weight given to time in adaptive policy, between 0 and 100") \ 1732 \ 1733 product(uintx, PausePadding, 1, \ 1734 "How much buffer to keep for pause time") \ 1735 \ 1736 product(uintx, PromotedPadding, 3, \ 1737 "How much buffer to keep for promotion failure") \ 1738 \ 1739 product(uintx, SurvivorPadding, 3, \ 1740 "How much buffer to keep for survivor overflow") \ 1741 \ 1742 product(uintx, AdaptivePermSizeWeight, 20, \ 1743 "Weight for perm gen exponential resizing, between 0 and 100") \ 1744 \ 1745 product(uintx, PermGenPadding, 3, \ 1746 "How much buffer to keep for perm gen sizing") \ 1747 \ 1748 product(uintx, ThresholdTolerance, 10, \ 1749 "Allowed collection cost difference between generations") \ 1750 \ 1751 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 1752 "If collection costs are within margin, reduce both by full delta") \ 1753 \ 1754 product(uintx, YoungGenerationSizeIncrement, 20, \ 1755 "Adaptive size percentage change in young generation") \ 1756 \ 1757 product(uintx, YoungGenerationSizeSupplement, 80, \ 1758 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 1759 \ 1760 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 1761 "Decay factor to YoungedGenerationSizeSupplement") \ 1762 \ 1763 product(uintx, TenuredGenerationSizeIncrement, 20, \ 1764 "Adaptive size percentage change in tenured generation") \ 1765 \ 1766 product(uintx, TenuredGenerationSizeSupplement, 80, \ 1767 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 1768 \ 1769 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 1770 "Decay factor to TenuredGenerationSizeIncrement") \ 1771 \ 1772 product(uintx, MaxGCPauseMillis, max_uintx, \ 1773 "Adaptive size policy maximum GC pause time goal in msec") \ 1774 \ 1775 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 1776 "Adaptive size policy maximum GC minor pause time goal in msec") \ 1777 \ 1778 product(uintx, GCTimeRatio, 99, \ 1779 "Adaptive size policy application time to GC time ratio") \ 1780 \ 1781 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 1782 "Adaptive size scale down factor for shrinking") \ 1783 \ 1784 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 1785 "Adaptive size decays the major cost for long major intervals") \ 1786 \ 1787 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 1788 "Time scale over which major costs decay") \ 1789 \ 1790 product(uintx, MinSurvivorRatio, 3, \ 1791 "Minimum ratio of young generation/survivor space size") \ 1792 \ 1793 product(uintx, InitialSurvivorRatio, 8, \ 1794 "Initial ratio of eden/survivor space size") \ 1795 \ 1796 product(uintx, BaseFootPrintEstimate, 256*M, \ 1797 "Estimate of footprint other than Java Heap") \ 1798 \ 1799 product(bool, UseGCOverheadLimit, true, \ 1800 "Use policy to limit of proportion of time spent in GC " \ 1801 "before an OutOfMemory error is thrown") \ 1802 \ 1803 product(uintx, GCTimeLimit, 98, \ 1804 "Limit of proportion of time spent in GC before an OutOfMemory" \ 1805 "error is thrown (used with GCHeapFreeLimit)") \ 1806 \ 1807 product(uintx, GCHeapFreeLimit, 2, \ 1808 "Minimum percentage of free space after a full GC before an " \ 1809 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 1810 \ 1811 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 1812 "Number of consecutive collections before gc time limit fires") \ 1813 \ 1814 product(bool, PrintAdaptiveSizePolicy, false, \ 1815 "Print information about AdaptiveSizePolicy") \ 1816 \ 1817 product(intx, PrefetchCopyIntervalInBytes, -1, \ 1818 "How far ahead to prefetch destination area (<= 0 means off)") \ 1819 \ 1820 product(intx, PrefetchScanIntervalInBytes, -1, \ 1821 "How far ahead to prefetch scan area (<= 0 means off)") \ 1822 \ 1823 product(intx, PrefetchFieldsAhead, -1, \ 1824 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 1825 \ 1826 develop(bool, UsePrefetchQueue, true, \ 1827 "Use the prefetch queue during PS promotion") \ 1828 \ 1829 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 1830 "Verify system before exiting") \ 1831 \ 1832 diagnostic(bool, VerifyBeforeGC, false, \ 1833 "Verify memory system before GC") \ 1834 \ 1835 diagnostic(bool, VerifyAfterGC, false, \ 1836 "Verify memory system after GC") \ 1837 \ 1838 diagnostic(bool, VerifyDuringGC, false, \ 1839 "Verify memory system during GC (between phases)") \ 1840 \ 1841 diagnostic(bool, GCParallelVerificationEnabled, true, \ 1842 "Enable parallel memory system verification") \ 1843 \ 1844 diagnostic(bool, VerifyRememberedSets, false, \ 1845 "Verify GC remembered sets") \ 1846 \ 1847 diagnostic(bool, VerifyObjectStartArray, true, \ 1848 "Verify GC object start array if verify before/after") \ 1849 \ 1850 product(bool, DisableExplicitGC, false, \ 1851 "Tells whether calling System.gc() does a full GC") \ 1852 \ 1853 notproduct(bool, CheckMemoryInitialization, false, \ 1854 "Checks memory initialization") \ 1855 \ 1856 product(bool, CollectGen0First, false, \ 1857 "Collect youngest generation before each full GC") \ 1858 \ 1859 diagnostic(bool, BindCMSThreadToCPU, false, \ 1860 "Bind CMS Thread to CPU if possible") \ 1861 \ 1862 diagnostic(uintx, CPUForCMSThread, 0, \ 1863 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 1864 \ 1865 product(bool, BindGCTaskThreadsToCPUs, false, \ 1866 "Bind GCTaskThreads to CPUs if possible") \ 1867 \ 1868 product(bool, UseGCTaskAffinity, false, \ 1869 "Use worker affinity when asking for GCTasks") \ 1870 \ 1871 product(uintx, ProcessDistributionStride, 4, \ 1872 "Stride through processors when distributing processes") \ 1873 \ 1874 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 1875 "number of times the coordinator GC thread will sleep while " \ 1876 "yielding before giving up and resuming GC") \ 1877 \ 1878 product(uintx, CMSYieldSleepCount, 0, \ 1879 "number of times a GC thread (minus the coordinator) " \ 1880 "will sleep while yielding before giving up and resuming GC") \ 1881 \ 1882 notproduct(bool, PrintFlagsFinal, false, \ 1883 "Print all command line flags after argument processing") \ 1884 \ 1885 /* gc tracing */ \ 1886 manageable(bool, PrintGC, false, \ 1887 "Print message at garbage collect") \ 1888 \ 1889 manageable(bool, PrintGCDetails, false, \ 1890 "Print more details at garbage collect") \ 1891 \ 1892 manageable(bool, PrintGCDateStamps, false, \ 1893 "Print date stamps at garbage collect") \ 1894 \ 1895 manageable(bool, PrintGCTimeStamps, false, \ 1896 "Print timestamps at garbage collect") \ 1897 \ 1898 product(bool, PrintGCTaskTimeStamps, false, \ 1899 "Print timestamps for individual gc worker thread tasks") \ 1900 \ 1901 develop(intx, ConcGCYieldTimeout, 0, \ 1902 "If non-zero, assert that GC threads yield within this # of ms.") \ 1903 \ 1904 notproduct(bool, TraceMarkSweep, false, \ 1905 "Trace mark sweep") \ 1906 \ 1907 product(bool, PrintReferenceGC, false, \ 1908 "Print times spent handling reference objects during GC " \ 1909 " (enabled only when PrintGCDetails)") \ 1910 \ 1911 develop(bool, TraceReferenceGC, false, \ 1912 "Trace handling of soft/weak/final/phantom references") \ 1913 \ 1914 develop(bool, TraceFinalizerRegistration, false, \ 1915 "Trace registration of final references") \ 1916 \ 1917 notproduct(bool, TraceScavenge, false, \ 1918 "Trace scavenge") \ 1919 \ 1920 product_rw(bool, TraceClassLoading, false, \ 1921 "Trace all classes loaded") \ 1922 \ 1923 product(bool, TraceClassLoadingPreorder, false, \ 1924 "Trace all classes loaded in order referenced (not loaded)") \ 1925 \ 1926 product_rw(bool, TraceClassUnloading, false, \ 1927 "Trace unloading of classes") \ 1928 \ 1929 product_rw(bool, TraceLoaderConstraints, false, \ 1930 "Trace loader constraints") \ 1931 \ 1932 product(bool, TraceGen0Time, false, \ 1933 "Trace accumulated time for Gen 0 collection") \ 1934 \ 1935 product(bool, TraceGen1Time, false, \ 1936 "Trace accumulated time for Gen 1 collection") \ 1937 \ 1938 product(bool, PrintTenuringDistribution, false, \ 1939 "Print tenuring age information") \ 1940 \ 1941 product_rw(bool, PrintHeapAtGC, false, \ 1942 "Print heap layout before and after each GC") \ 1943 \ 1944 product(bool, PrintHeapAtSIGBREAK, true, \ 1945 "Print heap layout in response to SIGBREAK") \ 1946 \ 1947 manageable(bool, PrintClassHistogram, false, \ 1948 "Print a histogram of class instances") \ 1949 \ 1950 develop(bool, TraceWorkGang, false, \ 1951 "Trace activities of work gangs") \ 1952 \ 1953 product(bool, TraceParallelOldGCTasks, false, \ 1954 "Trace multithreaded GC activity") \ 1955 \ 1956 develop(bool, TraceBlockOffsetTable, false, \ 1957 "Print BlockOffsetTable maps") \ 1958 \ 1959 develop(bool, TraceCardTableModRefBS, false, \ 1960 "Print CardTableModRefBS maps") \ 1961 \ 1962 develop(bool, TraceGCTaskManager, false, \ 1963 "Trace actions of the GC task manager") \ 1964 \ 1965 develop(bool, TraceGCTaskQueue, false, \ 1966 "Trace actions of the GC task queues") \ 1967 \ 1968 develop(bool, TraceGCTaskThread, false, \ 1969 "Trace actions of the GC task threads") \ 1970 \ 1971 product(bool, PrintParallelOldGCPhaseTimes, false, \ 1972 "Print the time taken by each parallel old gc phase." \ 1973 "PrintGCDetails must also be enabled.") \ 1974 \ 1975 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 1976 "Trace parallel old gc marking phase") \ 1977 \ 1978 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 1979 "Trace parallel old gc summary phase") \ 1980 \ 1981 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 1982 "Trace parallel old gc compaction phase") \ 1983 \ 1984 develop(bool, TraceParallelOldGCDensePrefix, false, \ 1985 "Trace parallel old gc dense prefix computation") \ 1986 \ 1987 develop(bool, IgnoreLibthreadGPFault, false, \ 1988 "Suppress workaround for libthread GP fault") \ 1989 \ 1990 product(bool, PrintJNIGCStalls, false, \ 1991 "Print diagnostic message when GC is stalled" \ 1992 "by JNI critical section") \ 1993 \ 1994 /* JVMTI heap profiling */ \ 1995 \ 1996 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 1997 "Trace JVMTI object tagging calls") \ 1998 \ 1999 diagnostic(bool, VerifyBeforeIteration, false, \ 2000 "Verify memory system before JVMTI iteration") \ 2001 \ 2002 /* compiler interface */ \ 2003 \ 2004 develop(bool, CIPrintCompilerName, false, \ 2005 "when CIPrint is active, print the name of the active compiler") \ 2006 \ 2007 develop(bool, CIPrintCompileQueue, false, \ 2008 "display the contents of the compile queue whenever a " \ 2009 "compilation is enqueued") \ 2010 \ 2011 develop(bool, CIPrintRequests, false, \ 2012 "display every request for compilation") \ 2013 \ 2014 product(bool, CITime, false, \ 2015 "collect timing information for compilation") \ 2016 \ 2017 develop(bool, CITimeEach, false, \ 2018 "display timing information after each successful compilation") \ 2019 \ 2020 develop(bool, CICountOSR, true, \ 2021 "use a separate counter when assigning ids to osr compilations") \ 2022 \ 2023 develop(bool, CICompileNatives, true, \ 2024 "compile native methods if supported by the compiler") \ 2025 \ 2026 develop_pd(bool, CICompileOSR, \ 2027 "compile on stack replacement methods if supported by the " \ 2028 "compiler") \ 2029 \ 2030 develop(bool, CIPrintMethodCodes, false, \ 2031 "print method bytecodes of the compiled code") \ 2032 \ 2033 develop(bool, CIPrintTypeFlow, false, \ 2034 "print the results of ciTypeFlow analysis") \ 2035 \ 2036 develop(bool, CITraceTypeFlow, false, \ 2037 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2038 \ 2039 develop(intx, CICloneLoopTestLimit, 100, \ 2040 "size limit for blocks heuristically cloned in ciTypeFlow") \ 2041 \ 2042 /* temp diagnostics */ \ 2043 \ 2044 diagnostic(bool, TraceRedundantCompiles, false, \ 2045 "Have compile broker print when a request already in the queue is"\ 2046 " requested again") \ 2047 \ 2048 diagnostic(bool, InitialCompileFast, false, \ 2049 "Initial compile at CompLevel_fast_compile") \ 2050 \ 2051 diagnostic(bool, InitialCompileReallyFast, false, \ 2052 "Initial compile at CompLevel_really_fast_compile (no profile)") \ 2053 \ 2054 diagnostic(bool, FullProfileOnReInterpret, true, \ 2055 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ 2056 \ 2057 /* compiler */ \ 2058 \ 2059 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2060 "Number of compiler threads to run") \ 2061 \ 2062 product(intx, CompilationPolicyChoice, 0, \ 2063 "which compilation policy (0/1)") \ 2064 \ 2065 develop(bool, UseStackBanging, true, \ 2066 "use stack banging for stack overflow checks (required for " \ 2067 "proper StackOverflow handling; disable only to measure cost " \ 2068 "of stackbanging)") \ 2069 \ 2070 develop(bool, Use24BitFPMode, true, \ 2071 "Set 24-bit FPU mode on a per-compile basis ") \ 2072 \ 2073 develop(bool, Use24BitFP, true, \ 2074 "use FP instructions that produce 24-bit precise results") \ 2075 \ 2076 develop(bool, UseStrictFP, true, \ 2077 "use strict fp if modifier strictfp is set") \ 2078 \ 2079 develop(bool, GenerateSynchronizationCode, true, \ 2080 "generate locking/unlocking code for synchronized methods and " \ 2081 "monitors") \ 2082 \ 2083 develop(bool, GenerateCompilerNullChecks, true, \ 2084 "Generate explicit null checks for loads/stores/calls") \ 2085 \ 2086 develop(bool, GenerateRangeChecks, true, \ 2087 "Generate range checks for array accesses") \ 2088 \ 2089 develop_pd(bool, ImplicitNullChecks, \ 2090 "generate code for implicit null checks") \ 2091 \ 2092 product(bool, PrintSafepointStatistics, false, \ 2093 "print statistics about safepoint synchronization") \ 2094 \ 2095 product(intx, PrintSafepointStatisticsCount, 300, \ 2096 "total number of safepoint statistics collected " \ 2097 "before printing them out") \ 2098 \ 2099 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2100 "print safepoint statistics only when safepoint takes" \ 2101 " more than PrintSafepointSatisticsTimeout in millis") \ 2102 \ 2103 develop(bool, InlineAccessors, true, \ 2104 "inline accessor methods (get/set)") \ 2105 \ 2106 product(bool, Inline, true, \ 2107 "enable inlining") \ 2108 \ 2109 product(bool, ClipInlining, true, \ 2110 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2111 \ 2112 develop(bool, UseCHA, true, \ 2113 "enable CHA") \ 2114 \ 2115 product(bool, UseTypeProfile, true, \ 2116 "Check interpreter profile for historically monomorphic calls") \ 2117 \ 2118 product(intx, TypeProfileMajorReceiverPercent, 90, \ 2119 "% of major receiver type to all profiled receivers") \ 2120 \ 2121 notproduct(bool, TimeCompiler, false, \ 2122 "time the compiler") \ 2123 \ 2124 notproduct(bool, TimeCompiler2, false, \ 2125 "detailed time the compiler (requires +TimeCompiler)") \ 2126 \ 2127 diagnostic(bool, PrintInlining, false, \ 2128 "prints inlining optimizations") \ 2129 \ 2130 diagnostic(bool, PrintIntrinsics, false, \ 2131 "prints attempted and successful inlining of intrinsics") \ 2132 \ 2133 diagnostic(ccstrlist, DisableIntrinsic, "", \ 2134 "do not expand intrinsics whose (internal) names appear here") \ 2135 \ 2136 develop(bool, StressReflectiveCode, false, \ 2137 "Use inexact types at allocations, etc., to test reflection") \ 2138 \ 2139 develop(bool, EagerInitialization, false, \ 2140 "Eagerly initialize classes if possible") \ 2141 \ 2142 product(bool, Tier1UpdateMethodData, trueInTiered, \ 2143 "Update methodDataOops in Tier1-generated code") \ 2144 \ 2145 develop(bool, TraceMethodReplacement, false, \ 2146 "Print when methods are replaced do to recompilation") \ 2147 \ 2148 develop(bool, PrintMethodFlushing, false, \ 2149 "print the nmethods being flushed") \ 2150 \ 2151 notproduct(bool, LogMultipleMutexLocking, false, \ 2152 "log locking and unlocking of mutexes (only if multiple locks " \ 2153 "are held)") \ 2154 \ 2155 develop(bool, UseRelocIndex, false, \ 2156 "use an index to speed random access to relocations") \ 2157 \ 2158 develop(bool, StressCodeBuffers, false, \ 2159 "Exercise code buffer expansion and other rare state changes") \ 2160 \ 2161 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2162 "Generate extra debugging info for non-safepoints in nmethods") \ 2163 \ 2164 diagnostic(bool, DebugInlinedCalls, true, \ 2165 "If false, restricts profiled locations to the root method only") \ 2166 \ 2167 product(bool, PrintVMOptions, trueInDebug, \ 2168 "print VM flag settings") \ 2169 \ 2170 diagnostic(bool, SerializeVMOutput, true, \ 2171 "Use a mutex to serialize output to tty and hotspot.log") \ 2172 \ 2173 diagnostic(bool, DisplayVMOutput, true, \ 2174 "Display all VM output on the tty, independently of LogVMOutput") \ 2175 \ 2176 diagnostic(bool, LogVMOutput, trueInDebug, \ 2177 "Save VM output to hotspot.log, or to LogFile") \ 2178 \ 2179 diagnostic(ccstr, LogFile, NULL, \ 2180 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2181 \ 2182 product(ccstr, ErrorFile, NULL, \ 2183 "If an error occurs, save the error data to this file " \ 2184 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2185 \ 2186 product(bool, DisplayVMOutputToStderr, false, \ 2187 "If DisplayVMOutput is true, display all VM output to stderr") \ 2188 \ 2189 product(bool, DisplayVMOutputToStdout, false, \ 2190 "If DisplayVMOutput is true, display all VM output to stdout") \ 2191 \ 2192 product(bool, UseHeavyMonitors, false, \ 2193 "use heavyweight instead of lightweight Java monitors") \ 2194 \ 2195 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2196 "print histogram of the symbol table") \ 2197 \ 2198 notproduct(bool, ExitVMOnVerifyError, false, \ 2199 "standard exit from VM if bytecode verify error " \ 2200 "(only in debug mode)") \ 2201 \ 2202 notproduct(ccstr, AbortVMOnException, NULL, \ 2203 "Call fatal if this exception is thrown. Example: " \ 2204 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2205 \ 2206 develop(bool, DebugVtables, false, \ 2207 "add debugging code to vtable dispatch") \ 2208 \ 2209 develop(bool, PrintVtables, false, \ 2210 "print vtables when printing klass") \ 2211 \ 2212 notproduct(bool, PrintVtableStats, false, \ 2213 "print vtables stats at end of run") \ 2214 \ 2215 develop(bool, TraceCreateZombies, false, \ 2216 "trace creation of zombie nmethods") \ 2217 \ 2218 notproduct(bool, IgnoreLockingAssertions, false, \ 2219 "disable locking assertions (for speed)") \ 2220 \ 2221 notproduct(bool, VerifyLoopOptimizations, false, \ 2222 "verify major loop optimizations") \ 2223 \ 2224 product(bool, RangeCheckElimination, true, \ 2225 "Split loop iterations to eliminate range checks") \ 2226 \ 2227 develop_pd(bool, UncommonNullCast, \ 2228 "track occurrences of null in casts; adjust compiler tactics") \ 2229 \ 2230 develop(bool, TypeProfileCasts, true, \ 2231 "treat casts like calls for purposes of type profiling") \ 2232 \ 2233 develop(bool, MonomorphicArrayCheck, true, \ 2234 "Uncommon-trap array store checks that require full type check") \ 2235 \ 2236 develop(bool, DelayCompilationDuringStartup, true, \ 2237 "Delay invoking the compiler until main application class is " \ 2238 "loaded") \ 2239 \ 2240 develop(bool, CompileTheWorld, false, \ 2241 "Compile all methods in all classes in bootstrap class path " \ 2242 "(stress test)") \ 2243 \ 2244 develop(bool, CompileTheWorldPreloadClasses, true, \ 2245 "Preload all classes used by a class before start loading") \ 2246 \ 2247 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \ 2248 "Compile all methods although class initializer failed") \ 2249 \ 2250 develop(bool, TraceIterativeGVN, false, \ 2251 "Print progress during Iterative Global Value Numbering") \ 2252 \ 2253 develop(bool, FillDelaySlots, true, \ 2254 "Fill delay slots (on SPARC only)") \ 2255 \ 2256 develop(bool, VerifyIterativeGVN, false, \ 2257 "Verify Def-Use modifications during sparse Iterative Global " \ 2258 "Value Numbering") \ 2259 \ 2260 notproduct(bool, TracePhaseCCP, false, \ 2261 "Print progress during Conditional Constant Propagation") \ 2262 \ 2263 develop(bool, TimeLivenessAnalysis, false, \ 2264 "Time computation of bytecode liveness analysis") \ 2265 \ 2266 develop(bool, TraceLivenessGen, false, \ 2267 "Trace the generation of liveness analysis information") \ 2268 \ 2269 notproduct(bool, TraceLivenessQuery, false, \ 2270 "Trace queries of liveness analysis information") \ 2271 \ 2272 notproduct(bool, CollectIndexSetStatistics, false, \ 2273 "Collect information about IndexSets") \ 2274 \ 2275 develop(bool, PrintDominators, false, \ 2276 "Print out dominator trees for GVN") \ 2277 \ 2278 develop(bool, UseLoopSafepoints, true, \ 2279 "Generate Safepoint nodes in every loop") \ 2280 \ 2281 notproduct(bool, TraceCISCSpill, false, \ 2282 "Trace allocators use of cisc spillable instructions") \ 2283 \ 2284 notproduct(bool, TraceSpilling, false, \ 2285 "Trace spilling") \ 2286 \ 2287 develop(bool, DeutschShiffmanExceptions, true, \ 2288 "Fast check to find exception handler for precisely typed " \ 2289 "exceptions") \ 2290 \ 2291 product(bool, SplitIfBlocks, true, \ 2292 "Clone compares and control flow through merge points to fold " \ 2293 "some branches") \ 2294 \ 2295 develop(intx, FastAllocateSizeLimit, 128*K, \ 2296 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2297 "Inline allocations larger than this in doublewords must go slow")\ 2298 \ 2299 product(bool, AggressiveOpts, false, \ 2300 "Enable aggressive optimizations - see arguments.cpp") \ 2301 \ 2302 product(bool, UseStringCache, false, \ 2303 "Enable String cache capabilities on String.java") \ 2304 \ 2305 /* statistics */ \ 2306 develop(bool, UseVTune, false, \ 2307 "enable support for Intel's VTune profiler") \ 2308 \ 2309 develop(bool, CountCompiledCalls, false, \ 2310 "counts method invocations") \ 2311 \ 2312 notproduct(bool, CountRuntimeCalls, false, \ 2313 "counts VM runtime calls") \ 2314 \ 2315 develop(bool, CountJNICalls, false, \ 2316 "counts jni method invocations") \ 2317 \ 2318 notproduct(bool, CountJVMCalls, false, \ 2319 "counts jvm method invocations") \ 2320 \ 2321 notproduct(bool, CountRemovableExceptions, false, \ 2322 "count exceptions that could be replaced by branches due to " \ 2323 "inlining") \ 2324 \ 2325 notproduct(bool, ICMissHistogram, false, \ 2326 "produce histogram of IC misses") \ 2327 \ 2328 notproduct(bool, PrintClassStatistics, false, \ 2329 "prints class statistics at end of run") \ 2330 \ 2331 notproduct(bool, PrintMethodStatistics, false, \ 2332 "prints method statistics at end of run") \ 2333 \ 2334 /* interpreter */ \ 2335 develop(bool, ClearInterpreterLocals, false, \ 2336 "Always clear local variables of interpreter activations upon " \ 2337 "entry") \ 2338 \ 2339 product_pd(bool, RewriteBytecodes, \ 2340 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2341 \ 2342 product_pd(bool, RewriteFrequentPairs, \ 2343 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2344 \ 2345 diagnostic(bool, PrintInterpreter, false, \ 2346 "Prints the generated interpreter code") \ 2347 \ 2348 product(bool, UseInterpreter, true, \ 2349 "Use interpreter for non-compiled methods") \ 2350 \ 2351 develop(bool, UseFastSignatureHandlers, true, \ 2352 "Use fast signature handlers for native calls") \ 2353 \ 2354 develop(bool, UseV8InstrsOnly, false, \ 2355 "Use SPARC-V8 Compliant instruction subset") \ 2356 \ 2357 product(bool, UseNiagaraInstrs, false, \ 2358 "Use Niagara-efficient instruction subset") \ 2359 \ 2360 develop(bool, UseCASForSwap, false, \ 2361 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 2362 \ 2363 product(bool, UseLoopCounter, true, \ 2364 "Increment invocation counter on backward branch") \ 2365 \ 2366 product(bool, UseFastEmptyMethods, true, \ 2367 "Use fast method entry code for empty methods") \ 2368 \ 2369 product(bool, UseFastAccessorMethods, true, \ 2370 "Use fast method entry code for accessor methods") \ 2371 \ 2372 product_pd(bool, UseOnStackReplacement, \ 2373 "Use on stack replacement, calls runtime if invoc. counter " \ 2374 "overflows in loop") \ 2375 \ 2376 notproduct(bool, TraceOnStackReplacement, false, \ 2377 "Trace on stack replacement") \ 2378 \ 2379 develop(bool, PoisonOSREntry, true, \ 2380 "Detect abnormal calls to OSR code") \ 2381 \ 2382 product_pd(bool, PreferInterpreterNativeStubs, \ 2383 "Use always interpreter stubs for native methods invoked via " \ 2384 "interpreter") \ 2385 \ 2386 develop(bool, CountBytecodes, false, \ 2387 "Count number of bytecodes executed") \ 2388 \ 2389 develop(bool, PrintBytecodeHistogram, false, \ 2390 "Print histogram of the executed bytecodes") \ 2391 \ 2392 develop(bool, PrintBytecodePairHistogram, false, \ 2393 "Print histogram of the executed bytecode pairs") \ 2394 \ 2395 diagnostic(bool, PrintSignatureHandlers, false, \ 2396 "Print code generated for native method signature handlers") \ 2397 \ 2398 develop(bool, VerifyOops, false, \ 2399 "Do plausibility checks for oops") \ 2400 \ 2401 develop(bool, CheckUnhandledOops, false, \ 2402 "Check for unhandled oops in VM code") \ 2403 \ 2404 develop(bool, VerifyJNIFields, trueInDebug, \ 2405 "Verify jfieldIDs for instance fields") \ 2406 \ 2407 notproduct(bool, VerifyJNIEnvThread, false, \ 2408 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2409 "from JNI") \ 2410 \ 2411 develop(bool, VerifyFPU, false, \ 2412 "Verify FPU state (check for NaN's, etc.)") \ 2413 \ 2414 develop(bool, VerifyThread, false, \ 2415 "Watch the thread register for corruption (SPARC only)") \ 2416 \ 2417 develop(bool, VerifyActivationFrameSize, false, \ 2418 "Verify that activation frame didn't become smaller than its " \ 2419 "minimal size") \ 2420 \ 2421 develop(bool, TraceFrequencyInlining, false, \ 2422 "Trace frequency based inlining") \ 2423 \ 2424 notproduct(bool, TraceTypeProfile, false, \ 2425 "Trace type profile") \ 2426 \ 2427 develop_pd(bool, InlineIntrinsics, \ 2428 "Inline intrinsics that can be statically resolved") \ 2429 \ 2430 product_pd(bool, ProfileInterpreter, \ 2431 "Profile at the bytecode level during interpretation") \ 2432 \ 2433 develop_pd(bool, ProfileTraps, \ 2434 "Profile deoptimization traps at the bytecode level") \ 2435 \ 2436 product(intx, ProfileMaturityPercentage, 20, \ 2437 "number of method invocations/branches (expressed as % of " \ 2438 "CompileThreshold) before using the method's profile") \ 2439 \ 2440 develop(bool, PrintMethodData, false, \ 2441 "Print the results of +ProfileInterpreter at end of run") \ 2442 \ 2443 develop(bool, VerifyDataPointer, trueInDebug, \ 2444 "Verify the method data pointer during interpreter profiling") \ 2445 \ 2446 develop(bool, VerifyCompiledCode, false, \ 2447 "Include miscellaneous runtime verifications in nmethod code; " \ 2448 "off by default because it disturbs nmethod size heuristics.") \ 2449 \ 2450 \ 2451 /* compilation */ \ 2452 product(bool, UseCompiler, true, \ 2453 "use compilation") \ 2454 \ 2455 develop(bool, TraceCompilationPolicy, false, \ 2456 "Trace compilation policy") \ 2457 \ 2458 develop(bool, TimeCompilationPolicy, false, \ 2459 "Time the compilation policy") \ 2460 \ 2461 product(bool, UseCounterDecay, true, \ 2462 "adjust recompilation counters") \ 2463 \ 2464 develop(intx, CounterHalfLifeTime, 30, \ 2465 "half-life time of invocation counters (in secs)") \ 2466 \ 2467 develop(intx, CounterDecayMinIntervalLength, 500, \ 2468 "Min. ms. between invocation of CounterDecay") \ 2469 \ 2470 product(bool, AlwaysCompileLoopMethods, false, \ 2471 "when using recompilation, never interpret methods " \ 2472 "containing loops") \ 2473 \ 2474 product(bool, DontCompileHugeMethods, true, \ 2475 "don't compile methods > HugeMethodLimit") \ 2476 \ 2477 /* Bytecode escape analysis estimation. */ \ 2478 product(bool, EstimateArgEscape, true, \ 2479 "Analyze bytecodes to estimate escape state of arguments") \ 2480 \ 2481 product(intx, BCEATraceLevel, 0, \ 2482 "How much tracing to do of bytecode escape analysis estimates") \ 2483 \ 2484 product(intx, MaxBCEAEstimateLevel, 5, \ 2485 "Maximum number of nested calls that are analyzed by BC EA.") \ 2486 \ 2487 product(intx, MaxBCEAEstimateSize, 150, \ 2488 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2489 \ 2490 product(intx, AllocatePrefetchStyle, 1, \ 2491 "0 = no prefetch, " \ 2492 "1 = prefetch instructions for each allocation, " \ 2493 "2 = use TLAB watermark to gate allocation prefetch") \ 2494 \ 2495 product(intx, AllocatePrefetchDistance, -1, \ 2496 "Distance to prefetch ahead of allocation pointer") \ 2497 \ 2498 product(intx, AllocatePrefetchLines, 1, \ 2499 "Number of lines to prefetch ahead of allocation pointer") \ 2500 \ 2501 product(intx, AllocatePrefetchStepSize, 16, \ 2502 "Step size in bytes of sequential prefetch instructions") \ 2503 \ 2504 product(intx, AllocatePrefetchInstr, 0, \ 2505 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2506 \ 2507 product(intx, ReadPrefetchInstr, 0, \ 2508 "Prefetch instruction to prefetch ahead") \ 2509 \ 2510 /* deoptimization */ \ 2511 develop(bool, TraceDeoptimization, false, \ 2512 "Trace deoptimization") \ 2513 \ 2514 develop(bool, DebugDeoptimization, false, \ 2515 "Tracing various information while debugging deoptimization") \ 2516 \ 2517 product(intx, SelfDestructTimer, 0, \ 2518 "Will cause VM to terminate after a given time (in minutes) " \ 2519 "(0 means off)") \ 2520 \ 2521 product(intx, MaxJavaStackTraceDepth, 1024, \ 2522 "Max. no. of lines in the stack trace for Java exceptions " \ 2523 "(0 means all)") \ 2524 \ 2525 develop(intx, GuaranteedSafepointInterval, 1000, \ 2526 "Guarantee a safepoint (at least) every so many milliseconds " \ 2527 "(0 means none)") \ 2528 \ 2529 product(intx, SafepointTimeoutDelay, 10000, \ 2530 "Delay in milliseconds for option SafepointTimeout") \ 2531 \ 2532 product(intx, NmethodSweepFraction, 4, \ 2533 "Number of invocations of sweeper to cover all nmethods") \ 2534 \ 2535 notproduct(intx, MemProfilingInterval, 500, \ 2536 "Time between each invocation of the MemProfiler") \ 2537 \ 2538 develop(intx, MallocCatchPtr, -1, \ 2539 "Hit breakpoint when mallocing/freeing this pointer") \ 2540 \ 2541 notproduct(intx, AssertRepeat, 1, \ 2542 "number of times to evaluate expression in assert " \ 2543 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2544 \ 2545 notproduct(ccstrlist, SuppressErrorAt, "", \ 2546 "List of assertions (file:line) to muzzle") \ 2547 \ 2548 notproduct(uintx, HandleAllocationLimit, 1024, \ 2549 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2550 "is used") \ 2551 \ 2552 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2553 "Threshold for total handle allocation when " \ 2554 "+TraceHandleAllocation is used") \ 2555 \ 2556 develop(intx, StackPrintLimit, 100, \ 2557 "number of stack frames to print in VM-level stack dump") \ 2558 \ 2559 notproduct(intx, MaxElementPrintSize, 256, \ 2560 "maximum number of elements to print") \ 2561 \ 2562 notproduct(intx, MaxSubklassPrintSize, 4, \ 2563 "maximum number of subklasses to print when printing klass") \ 2564 \ 2565 develop(intx, MaxInlineLevel, 9, \ 2566 "maximum number of nested calls that are inlined") \ 2567 \ 2568 develop(intx, MaxRecursiveInlineLevel, 1, \ 2569 "maximum number of nested recursive calls that are inlined") \ 2570 \ 2571 product(intx, InlineSmallCode, 1000, \ 2572 "Only inline already compiled methods if their code size is " \ 2573 "less than this") \ 2574 \ 2575 product(intx, MaxInlineSize, 35, \ 2576 "maximum bytecode size of a method to be inlined") \ 2577 \ 2578 product_pd(intx, FreqInlineSize, \ 2579 "maximum bytecode size of a frequent method to be inlined") \ 2580 \ 2581 develop(intx, MaxTrivialSize, 6, \ 2582 "maximum bytecode size of a trivial method to be inlined") \ 2583 \ 2584 develop(intx, MinInliningThreshold, 250, \ 2585 "min. invocation count a method needs to have to be inlined") \ 2586 \ 2587 develop(intx, AlignEntryCode, 4, \ 2588 "aligns entry code to specified value (in bytes)") \ 2589 \ 2590 develop(intx, MethodHistogramCutoff, 100, \ 2591 "cutoff value for method invoc. histogram (+CountCalls)") \ 2592 \ 2593 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2594 "# of interpreted methods to show in profile") \ 2595 \ 2596 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2597 "# of compiled methods to show in profile") \ 2598 \ 2599 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2600 "# of stub methods to show in profile") \ 2601 \ 2602 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2603 "# of runtime stub nodes to show in profile") \ 2604 \ 2605 product(intx, ProfileIntervalsTicks, 100, \ 2606 "# of ticks between printing of interval profile " \ 2607 "(+ProfileIntervals)") \ 2608 \ 2609 notproduct(intx, ScavengeALotInterval, 1, \ 2610 "Interval between which scavenge will occur with +ScavengeALot") \ 2611 \ 2612 notproduct(intx, FullGCALotInterval, 1, \ 2613 "Interval between which full gc will occur with +FullGCALot") \ 2614 \ 2615 notproduct(intx, FullGCALotStart, 0, \ 2616 "For which invocation to start FullGCAlot") \ 2617 \ 2618 notproduct(intx, FullGCALotDummies, 32*K, \ 2619 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2620 "to move") \ 2621 \ 2622 develop(intx, DontYieldALotInterval, 10, \ 2623 "Interval between which yields will be dropped (milliseconds)") \ 2624 \ 2625 develop(intx, MinSleepInterval, 1, \ 2626 "Minimum sleep() interval (milliseconds) when " \ 2627 "ConvertSleepToYield is off (used for SOLARIS)") \ 2628 \ 2629 product(intx, EventLogLength, 2000, \ 2630 "maximum nof events in event log") \ 2631 \ 2632 develop(intx, ProfilerPCTickThreshold, 15, \ 2633 "Number of ticks in a PC buckets to be a hotspot") \ 2634 \ 2635 notproduct(intx, DeoptimizeALotInterval, 5, \ 2636 "Number of exits until DeoptimizeALot kicks in") \ 2637 \ 2638 notproduct(intx, ZombieALotInterval, 5, \ 2639 "Number of exits until ZombieALot kicks in") \ 2640 \ 2641 develop(bool, StressNonEntrant, false, \ 2642 "Mark nmethods non-entrant at registration") \ 2643 \ 2644 diagnostic(intx, MallocVerifyInterval, 0, \ 2645 "if non-zero, verify C heap after every N calls to " \ 2646 "malloc/realloc/free") \ 2647 \ 2648 diagnostic(intx, MallocVerifyStart, 0, \ 2649 "if non-zero, start verifying C heap after Nth call to " \ 2650 "malloc/realloc/free") \ 2651 \ 2652 product(intx, TypeProfileWidth, 2, \ 2653 "number of receiver types to record in call/cast profile") \ 2654 \ 2655 develop(intx, BciProfileWidth, 2, \ 2656 "number of return bci's to record in ret profile") \ 2657 \ 2658 product(intx, PerMethodRecompilationCutoff, 400, \ 2659 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2660 \ 2661 product(intx, PerBytecodeRecompilationCutoff, 100, \ 2662 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2663 \ 2664 product(intx, PerMethodTrapLimit, 100, \ 2665 "Limit on traps (of one kind) in a method (includes inlines)") \ 2666 \ 2667 product(intx, PerBytecodeTrapLimit, 4, \ 2668 "Limit on traps (of one kind) at a particular BCI") \ 2669 \ 2670 develop(intx, FreqCountInvocations, 1, \ 2671 "Scaling factor for branch frequencies (deprecated)") \ 2672 \ 2673 develop(intx, InlineFrequencyRatio, 20, \ 2674 "Ratio of call site execution to caller method invocation") \ 2675 \ 2676 develop_pd(intx, InlineFrequencyCount, \ 2677 "Count of call site execution necessary to trigger frequent " \ 2678 "inlining") \ 2679 \ 2680 develop(intx, InlineThrowCount, 50, \ 2681 "Force inlining of interpreted methods that throw this often") \ 2682 \ 2683 develop(intx, InlineThrowMaxSize, 200, \ 2684 "Force inlining of throwing methods smaller than this") \ 2685 \ 2686 product(intx, AliasLevel, 3, \ 2687 "0 for no aliasing, 1 for oop/field/static/array split, " \ 2688 "2 for class split, 3 for unique instances") \ 2689 \ 2690 develop(bool, VerifyAliases, false, \ 2691 "perform extra checks on the results of alias analysis") \ 2692 \ 2693 develop(intx, ProfilerNodeSize, 1024, \ 2694 "Size in K to allocate for the Profile Nodes of each thread") \ 2695 \ 2696 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ 2697 "Number of times to spin wait on a v8 atomic operation lock") \ 2698 \ 2699 product(intx, ReadSpinIterations, 100, \ 2700 "Number of read attempts before a yield (spin inner loop)") \ 2701 \ 2702 product_pd(intx, PreInflateSpin, \ 2703 "Number of times to spin wait before inflation") \ 2704 \ 2705 product(intx, PreBlockSpin, 10, \ 2706 "Number of times to spin in an inflated lock before going to " \ 2707 "an OS lock") \ 2708 \ 2709 /* gc parameters */ \ 2710 product(uintx, MaxHeapSize, ScaleForWordSize(64*M), \ 2711 "Default maximum size for object heap (in bytes)") \ 2712 \ 2713 product_pd(uintx, NewSize, \ 2714 "Default size of new generation (in bytes)") \ 2715 \ 2716 product(uintx, MaxNewSize, max_uintx, \ 2717 "Maximum size of new generation (in bytes)") \ 2718 \ 2719 product(uintx, PretenureSizeThreshold, 0, \ 2720 "Max size in bytes of objects allocated in DefNew generation") \ 2721 \ 2722 product_pd(uintx, TLABSize, \ 2723 "Default (or starting) size of TLAB (in bytes)") \ 2724 \ 2725 product(uintx, MinTLABSize, 2*K, \ 2726 "Minimum allowed TLAB size (in bytes)") \ 2727 \ 2728 product(uintx, TLABAllocationWeight, 35, \ 2729 "Allocation averaging weight") \ 2730 \ 2731 product(uintx, TLABWasteTargetPercent, 1, \ 2732 "Percentage of Eden that can be wasted") \ 2733 \ 2734 product(uintx, TLABRefillWasteFraction, 64, \ 2735 "Max TLAB waste at a refill (internal fragmentation)") \ 2736 \ 2737 product(uintx, TLABWasteIncrement, 4, \ 2738 "Increment allowed waste at slow allocation") \ 2739 \ 2740 product_pd(intx, SurvivorRatio, \ 2741 "Ratio of eden/survivor space size") \ 2742 \ 2743 product_pd(intx, NewRatio, \ 2744 "Ratio of new/old generation sizes") \ 2745 \ 2746 product(uintx, MaxLiveObjectEvacuationRatio, 100, \ 2747 "Max percent of eden objects that will be live at scavenge") \ 2748 \ 2749 product_pd(uintx, NewSizeThreadIncrease, \ 2750 "Additional size added to desired new generation size per " \ 2751 "non-daemon thread (in bytes)") \ 2752 \ 2753 product(uintx, OldSize, ScaleForWordSize(4096*K), \ 2754 "Default size of tenured generation (in bytes)") \ 2755 \ 2756 product_pd(uintx, PermSize, \ 2757 "Default size of permanent generation (in bytes)") \ 2758 \ 2759 product_pd(uintx, MaxPermSize, \ 2760 "Maximum size of permanent generation (in bytes)") \ 2761 \ 2762 product(uintx, MinHeapFreeRatio, 40, \ 2763 "Min percentage of heap free after GC to avoid expansion") \ 2764 \ 2765 product(uintx, MaxHeapFreeRatio, 70, \ 2766 "Max percentage of heap free after GC to avoid shrinking") \ 2767 \ 2768 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 2769 "Number of milliseconds per MB of free space in the heap") \ 2770 \ 2771 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 2772 "Min change in heap space due to GC (in bytes)") \ 2773 \ 2774 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ 2775 "Min expansion of permanent heap (in bytes)") \ 2776 \ 2777 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ 2778 "Max expansion of permanent heap without full GC (in bytes)") \ 2779 \ 2780 product(intx, QueuedAllocationWarningCount, 0, \ 2781 "Number of times an allocation that queues behind a GC " \ 2782 "will retry before printing a warning") \ 2783 \ 2784 diagnostic(uintx, VerifyGCStartAt, 0, \ 2785 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 2786 \ 2787 diagnostic(intx, VerifyGCLevel, 0, \ 2788 "Generation level at which to start +VerifyBefore/AfterGC") \ 2789 \ 2790 develop(uintx, ExitAfterGCNum, 0, \ 2791 "If non-zero, exit after this GC.") \ 2792 \ 2793 product(intx, MaxTenuringThreshold, 15, \ 2794 "Maximum value for tenuring threshold") \ 2795 \ 2796 product(intx, InitialTenuringThreshold, 7, \ 2797 "Initial value for tenuring threshold") \ 2798 \ 2799 product(intx, TargetSurvivorRatio, 50, \ 2800 "Desired percentage of survivor space used after scavenge") \ 2801 \ 2802 product(uintx, MarkSweepDeadRatio, 5, \ 2803 "Percentage (0-100) of the old gen allowed as dead wood." \ 2804 "Serial mark sweep treats this as both the min and max value." \ 2805 "CMS uses this value only if it falls back to mark sweep." \ 2806 "Par compact uses a variable scale based on the density of the" \ 2807 "generation and treats this as the max value when the heap is" \ 2808 "either completely full or completely empty. Par compact also" \ 2809 "has a smaller default value; see arguments.cpp.") \ 2810 \ 2811 product(uintx, PermMarkSweepDeadRatio, 20, \ 2812 "Percentage (0-100) of the perm gen allowed as dead wood." \ 2813 "See MarkSweepDeadRatio for collector-specific comments.") \ 2814 \ 2815 product(intx, MarkSweepAlwaysCompactCount, 4, \ 2816 "How often should we fully compact the heap (ignoring the dead " \ 2817 "space parameters)") \ 2818 \ 2819 product(intx, PrintCMSStatistics, 0, \ 2820 "Statistics for CMS") \ 2821 \ 2822 product(bool, PrintCMSInitiationStatistics, false, \ 2823 "Statistics for initiating a CMS collection") \ 2824 \ 2825 product(intx, PrintFLSStatistics, 0, \ 2826 "Statistics for CMS' FreeListSpace") \ 2827 \ 2828 product(intx, PrintFLSCensus, 0, \ 2829 "Census for CMS' FreeListSpace") \ 2830 \ 2831 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 2832 "Delay in ms between expansion and allocation") \ 2833 \ 2834 product(intx, DeferThrSuspendLoopCount, 4000, \ 2835 "(Unstable) Number of times to iterate in safepoint loop " \ 2836 " before blocking VM threads ") \ 2837 \ 2838 product(intx, DeferPollingPageLoopCount, -1, \ 2839 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 2840 "before changing safepoint polling page to RO ") \ 2841 \ 2842 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 2843 \ 2844 product(bool, UseDepthFirstScavengeOrder, true, \ 2845 "true: the scavenge order will be depth-first, " \ 2846 "false: the scavenge order will be breadth-first") \ 2847 \ 2848 product(bool, PSChunkLargeArrays, true, \ 2849 "true: process large arrays in chunks") \ 2850 \ 2851 product(uintx, GCDrainStackTargetSize, 64, \ 2852 "how many entries we'll try to leave on the stack during " \ 2853 "parallel GC") \ 2854 \ 2855 product(intx, DCQBarrierQueueBufferSize, 256, \ 2856 "Number of elements in a dirty card queue buffer") \ 2857 \ 2858 product(intx, DCQBarrierProcessCompletedThreshold, 5, \ 2859 "Number of completed dirty card buffers to trigger processing.") \ 2860 \ 2861 /* stack parameters */ \ 2862 product_pd(intx, StackYellowPages, \ 2863 "Number of yellow zone (recoverable overflows) pages") \ 2864 \ 2865 product_pd(intx, StackRedPages, \ 2866 "Number of red zone (unrecoverable overflows) pages") \ 2867 \ 2868 product_pd(intx, StackShadowPages, \ 2869 "Number of shadow zone (for overflow checking) pages" \ 2870 " this should exceed the depth of the VM and native call stack") \ 2871 \ 2872 product_pd(intx, ThreadStackSize, \ 2873 "Thread Stack Size (in Kbytes)") \ 2874 \ 2875 product_pd(intx, VMThreadStackSize, \ 2876 "Non-Java Thread Stack Size (in Kbytes)") \ 2877 \ 2878 product_pd(intx, CompilerThreadStackSize, \ 2879 "Compiler Thread Stack Size (in Kbytes)") \ 2880 \ 2881 develop_pd(uintx, JVMInvokeMethodSlack, \ 2882 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 2883 \ 2884 product(uintx, ThreadSafetyMargin, 50*M, \ 2885 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 2886 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 2887 "disable this feature") \ 2888 \ 2889 /* code cache parameters */ \ 2890 develop(uintx, CodeCacheSegmentSize, 64, \ 2891 "Code cache segment size (in bytes) - smallest unit of " \ 2892 "allocation") \ 2893 \ 2894 develop_pd(intx, CodeEntryAlignment, \ 2895 "Code entry alignment for generated code (in bytes)") \ 2896 \ 2897 product_pd(uintx, InitialCodeCacheSize, \ 2898 "Initial code cache size (in bytes)") \ 2899 \ 2900 product_pd(uintx, ReservedCodeCacheSize, \ 2901 "Reserved code cache size (in bytes) - maximum code cache size") \ 2902 \ 2903 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 2904 "When less than X space left, we stop compiling.") \ 2905 \ 2906 product_pd(uintx, CodeCacheExpansionSize, \ 2907 "Code cache expansion size (in bytes)") \ 2908 \ 2909 develop_pd(uintx, CodeCacheMinBlockLength, \ 2910 "Minimum number of segments in a code cache block.") \ 2911 \ 2912 notproduct(bool, ExitOnFullCodeCache, false, \ 2913 "Exit the VM if we fill the code cache.") \ 2914 \ 2915 /* interpreter debugging */ \ 2916 develop(intx, BinarySwitchThreshold, 5, \ 2917 "Minimal number of lookupswitch entries for rewriting to binary " \ 2918 "switch") \ 2919 \ 2920 develop(intx, StopInterpreterAt, 0, \ 2921 "Stops interpreter execution at specified bytecode number") \ 2922 \ 2923 develop(intx, TraceBytecodesAt, 0, \ 2924 "Traces bytecodes starting with specified bytecode number") \ 2925 \ 2926 /* compiler interface */ \ 2927 develop(intx, CIStart, 0, \ 2928 "the id of the first compilation to permit") \ 2929 \ 2930 develop(intx, CIStop, -1, \ 2931 "the id of the last compilation to permit") \ 2932 \ 2933 develop(intx, CIStartOSR, 0, \ 2934 "the id of the first osr compilation to permit " \ 2935 "(CICountOSR must be on)") \ 2936 \ 2937 develop(intx, CIStopOSR, -1, \ 2938 "the id of the last osr compilation to permit " \ 2939 "(CICountOSR must be on)") \ 2940 \ 2941 develop(intx, CIBreakAtOSR, -1, \ 2942 "id of osr compilation to break at") \ 2943 \ 2944 develop(intx, CIBreakAt, -1, \ 2945 "id of compilation to break at") \ 2946 \ 2947 product(ccstrlist, CompileOnly, "", \ 2948 "List of methods (pkg/class.name) to restrict compilation to") \ 2949 \ 2950 product(ccstr, CompileCommandFile, NULL, \ 2951 "Read compiler commands from this file [.hotspot_compiler]") \ 2952 \ 2953 product(ccstrlist, CompileCommand, "", \ 2954 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 2955 \ 2956 product(bool, CICompilerCountPerCPU, false, \ 2957 "1 compiler thread for log(N CPUs)") \ 2958 \ 2959 develop(intx, CIFireOOMAt, -1, \ 2960 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 2961 "(non-negative value throws OOM after this many CI accesses " \ 2962 "in each compile)") \ 2963 \ 2964 develop(intx, CIFireOOMAtDelay, -1, \ 2965 "Wait for this many CI accesses to occur in all compiles before " \ 2966 "beginning to throw OutOfMemoryErrors in each compile") \ 2967 \ 2968 /* Priorities */ \ 2969 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 2970 \ 2971 product(intx, ThreadPriorityPolicy, 0, \ 2972 "0 : Normal. "\ 2973 " VM chooses priorities that are appropriate for normal "\ 2974 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 2975 " to normal native priority. Java priorities below NORM_PRIORITY"\ 2976 " map to lower native priority values. On Windows applications"\ 2977 " are allowed to use higher native priorities. However, with "\ 2978 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 2979 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 2980 " interfere with system threads. On Linux thread priorities "\ 2981 " are ignored because the OS does not support static priority "\ 2982 " in SCHED_OTHER scheduling class which is the only choice for"\ 2983 " non-root, non-realtime applications. "\ 2984 "1 : Aggressive. "\ 2985 " Java thread priorities map over to the entire range of "\ 2986 " native thread priorities. Higher Java thread priorities map "\ 2987 " to higher native thread priorities. This policy should be "\ 2988 " used with care, as sometimes it can cause performance "\ 2989 " degradation in the application and/or the entire system. On "\ 2990 " Linux this policy requires root privilege.") \ 2991 \ 2992 product(bool, ThreadPriorityVerbose, false, \ 2993 "print priority changes") \ 2994 \ 2995 product(intx, DefaultThreadPriority, -1, \ 2996 "what native priority threads run at if not specified elsewhere (-1 means no change)") \ 2997 \ 2998 product(intx, CompilerThreadPriority, -1, \ 2999 "what priority should compiler threads run at (-1 means no change)") \ 3000 \ 3001 product(intx, VMThreadPriority, -1, \ 3002 "what priority should VM threads run at (-1 means no change)") \ 3003 \ 3004 product(bool, CompilerThreadHintNoPreempt, true, \ 3005 "(Solaris only) Give compiler threads an extra quanta") \ 3006 \ 3007 product(bool, VMThreadHintNoPreempt, false, \ 3008 "(Solaris only) Give VM thread an extra quanta") \ 3009 \ 3010 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3011 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3012 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3013 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3014 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3015 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3016 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3017 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3018 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3019 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3020 \ 3021 /* compiler debugging */ \ 3022 notproduct(intx, CompileTheWorldStartAt, 1, \ 3023 "First class to consider when using +CompileTheWorld") \ 3024 \ 3025 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3026 "Last class to consider when using +CompileTheWorld") \ 3027 \ 3028 develop(intx, NewCodeParameter, 0, \ 3029 "Testing Only: Create a dedicated integer parameter before " \ 3030 "putback") \ 3031 \ 3032 /* new oopmap storage allocation */ \ 3033 develop(intx, MinOopMapAllocation, 8, \ 3034 "Minimum number of OopMap entries in an OopMapSet") \ 3035 \ 3036 /* Background Compilation */ \ 3037 develop(intx, LongCompileThreshold, 50, \ 3038 "Used with +TraceLongCompiles") \ 3039 \ 3040 product(intx, StarvationMonitorInterval, 200, \ 3041 "Pause between each check in ms") \ 3042 \ 3043 /* recompilation */ \ 3044 product_pd(intx, CompileThreshold, \ 3045 "number of interpreted method invocations before (re-)compiling") \ 3046 \ 3047 product_pd(intx, BackEdgeThreshold, \ 3048 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3049 \ 3050 product(intx, Tier1BytecodeLimit, 10, \ 3051 "Must have at least this many bytecodes before tier1" \ 3052 "invocation counters are used") \ 3053 \ 3054 product_pd(intx, Tier2CompileThreshold, \ 3055 "threshold at which a tier 2 compilation is invoked") \ 3056 \ 3057 product_pd(intx, Tier2BackEdgeThreshold, \ 3058 "Back edge threshold at which a tier 2 compilation is invoked") \ 3059 \ 3060 product_pd(intx, Tier3CompileThreshold, \ 3061 "threshold at which a tier 3 compilation is invoked") \ 3062 \ 3063 product_pd(intx, Tier3BackEdgeThreshold, \ 3064 "Back edge threshold at which a tier 3 compilation is invoked") \ 3065 \ 3066 product_pd(intx, Tier4CompileThreshold, \ 3067 "threshold at which a tier 4 compilation is invoked") \ 3068 \ 3069 product_pd(intx, Tier4BackEdgeThreshold, \ 3070 "Back edge threshold at which a tier 4 compilation is invoked") \ 3071 \ 3072 product_pd(bool, TieredCompilation, \ 3073 "Enable two-tier compilation") \ 3074 \ 3075 product(bool, StressTieredRuntime, false, \ 3076 "Alternate client and server compiler on compile requests") \ 3077 \ 3078 product_pd(intx, OnStackReplacePercentage, \ 3079 "NON_TIERED number of method invocations/branches (expressed as %"\ 3080 "of CompileThreshold) before (re-)compiling OSR code") \ 3081 \ 3082 product(intx, InterpreterProfilePercentage, 33, \ 3083 "NON_TIERED number of method invocations/branches (expressed as %"\ 3084 "of CompileThreshold) before profiling in the interpreter") \ 3085 \ 3086 develop(intx, MaxRecompilationSearchLength, 10, \ 3087 "max. # frames to inspect searching for recompilee") \ 3088 \ 3089 develop(intx, MaxInterpretedSearchLength, 3, \ 3090 "max. # interp. frames to skip when searching for recompilee") \ 3091 \ 3092 develop(intx, DesiredMethodLimit, 8000, \ 3093 "desired max. method size (in bytecodes) after inlining") \ 3094 \ 3095 develop(intx, HugeMethodLimit, 8000, \ 3096 "don't compile methods larger than this if " \ 3097 "+DontCompileHugeMethods") \ 3098 \ 3099 /* New JDK 1.4 reflection implementation */ \ 3100 \ 3101 develop(bool, UseNewReflection, true, \ 3102 "Temporary flag for transition to reflection based on dynamic " \ 3103 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3104 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3105 "changes were needed") \ 3106 \ 3107 develop(bool, VerifyReflectionBytecodes, false, \ 3108 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3109 "in situations like that described in 4486457 or for " \ 3110 "constructors generated for serialization, so can not be enabled "\ 3111 "in product.") \ 3112 \ 3113 product(bool, ReflectionWrapResolutionErrors, true, \ 3114 "Temporary flag for transition to AbstractMethodError wrapped " \ 3115 "in InvocationTargetException. See 6531596") \ 3116 \ 3117 \ 3118 develop(intx, FastSuperclassLimit, 8, \ 3119 "Depth of hardwired instanceof accelerator array") \ 3120 \ 3121 /* Properties for Java libraries */ \ 3122 \ 3123 product(intx, MaxDirectMemorySize, -1, \ 3124 "Maximum total size of NIO direct-buffer allocations") \ 3125 \ 3126 /* temporary developer defined flags */ \ 3127 \ 3128 diagnostic(bool, UseNewCode, false, \ 3129 "Testing Only: Use the new version while testing") \ 3130 \ 3131 diagnostic(bool, UseNewCode2, false, \ 3132 "Testing Only: Use the new version while testing") \ 3133 \ 3134 diagnostic(bool, UseNewCode3, false, \ 3135 "Testing Only: Use the new version while testing") \ 3136 \ 3137 /* flags for performance data collection */ \ 3138 \ 3139 product(bool, UsePerfData, true, \ 3140 "Flag to disable jvmstat instrumentation for performance testing" \ 3141 "and problem isolation purposes.") \ 3142 \ 3143 product(bool, PerfDataSaveToFile, false, \ 3144 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3145 \ 3146 product(ccstr, PerfDataSaveFile, NULL, \ 3147 "Save PerfData memory to the specified absolute pathname," \ 3148 "%p in the file name if present will be replaced by pid") \ 3149 \ 3150 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3151 "Data sampling interval in milliseconds") \ 3152 \ 3153 develop(bool, PerfTraceDataCreation, false, \ 3154 "Trace creation of Performance Data Entries") \ 3155 \ 3156 develop(bool, PerfTraceMemOps, false, \ 3157 "Trace PerfMemory create/attach/detach calls") \ 3158 \ 3159 product(bool, PerfDisableSharedMem, false, \ 3160 "Store performance data in standard memory") \ 3161 \ 3162 product(intx, PerfDataMemorySize, 32*K, \ 3163 "Size of performance data memory region. Will be rounded " \ 3164 "up to a multiple of the native os page size.") \ 3165 \ 3166 product(intx, PerfMaxStringConstLength, 1024, \ 3167 "Maximum PerfStringConstant string length before truncation") \ 3168 \ 3169 product(bool, PerfAllowAtExitRegistration, false, \ 3170 "Allow registration of atexit() methods") \ 3171 \ 3172 product(bool, PerfBypassFileSystemCheck, false, \ 3173 "Bypass Win32 file system criteria checks (Windows Only)") \ 3174 \ 3175 product(intx, UnguardOnExecutionViolation, 0, \ 3176 "Unguard page and retry on no-execute fault (Win32 only)" \ 3177 "0=off, 1=conservative, 2=aggressive") \ 3178 \ 3179 /* Serviceability Support */ \ 3180 \ 3181 product(bool, ManagementServer, false, \ 3182 "Create JMX Management Server") \ 3183 \ 3184 product(bool, DisableAttachMechanism, false, \ 3185 "Disable mechanism that allows tools to attach to this VM") \ 3186 \ 3187 product(bool, StartAttachListener, false, \ 3188 "Always start Attach Listener at VM startup") \ 3189 \ 3190 manageable(bool, PrintConcurrentLocks, false, \ 3191 "Print java.util.concurrent locks in thread dump") \ 3192 \ 3193 /* Shared spaces */ \ 3194 \ 3195 product(bool, UseSharedSpaces, true, \ 3196 "Use shared spaces in the permanent generation") \ 3197 \ 3198 product(bool, RequireSharedSpaces, false, \ 3199 "Require shared spaces in the permanent generation") \ 3200 \ 3201 product(bool, ForceSharedSpaces, false, \ 3202 "Require shared spaces in the permanent generation") \ 3203 \ 3204 product(bool, DumpSharedSpaces, false, \ 3205 "Special mode: JVM reads a class list, loads classes, builds " \ 3206 "shared spaces, and dumps the shared spaces to a file to be " \ 3207 "used in future JVM runs.") \ 3208 \ 3209 product(bool, PrintSharedSpaces, false, \ 3210 "Print usage of shared spaces") \ 3211 \ 3212 product(uintx, SharedDummyBlockSize, 512*M, \ 3213 "Size of dummy block used to shift heap addresses (in bytes)") \ 3214 \ 3215 product(uintx, SharedReadWriteSize, 12*M, \ 3216 "Size of read-write space in permanent generation (in bytes)") \ 3217 \ 3218 product(uintx, SharedReadOnlySize, 8*M, \ 3219 "Size of read-only space in permanent generation (in bytes)") \ 3220 \ 3221 product(uintx, SharedMiscDataSize, 4*M, \ 3222 "Size of the shared data area adjacent to the heap (in bytes)") \ 3223 \ 3224 product(uintx, SharedMiscCodeSize, 4*M, \ 3225 "Size of the shared code area adjacent to the heap (in bytes)") \ 3226 \ 3227 diagnostic(bool, SharedOptimizeColdStart, true, \ 3228 "At dump time, order shared objects to achieve better " \ 3229 "cold startup time.") \ 3230 \ 3231 develop(intx, SharedOptimizeColdStartPolicy, 2, \ 3232 "Reordering policy for SharedOptimizeColdStart " \ 3233 "0=favor classload-time locality, 1=balanced, " \ 3234 "2=favor runtime locality") \ 3235 \ 3236 diagnostic(bool, SharedSkipVerify, false, \ 3237 "Skip assert() and verify() which page-in unwanted shared " \ 3238 "objects. ") \ 3239 \ 3240 product(bool, AnonymousClasses, false, \ 3241 "support sun.misc.Unsafe.defineAnonymousClass") \ 3242 \ 3243 product(bool, TaggedStackInterpreter, false, \ 3244 "Insert tags in interpreter execution stack for oopmap generaion")\ 3245 \ 3246 diagnostic(bool, PauseAtStartup, false, \ 3247 "Causes the VM to pause at startup time and wait for the pause " \ 3248 "file to be removed (default: ./vm.paused.<pid>)") \ 3249 \ 3250 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3251 "The file to create and for whose removal to await when pausing " \ 3252 "at startup. (default: ./vm.paused.<pid>)") \ 3253 \ 3254 product(bool, ExtendedDTraceProbes, false, \ 3255 "Enable performance-impacting dtrace probes") \ 3256 \ 3257 product(bool, DTraceMethodProbes, false, \ 3258 "Enable dtrace probes for method-entry and method-exit") \ 3259 \ 3260 product(bool, DTraceAllocProbes, false, \ 3261 "Enable dtrace probes for object allocation") \ 3262 \ 3263 product(bool, DTraceMonitorProbes, false, \ 3264 "Enable dtrace probes for monitor events") \ 3265 \ 3266 product(bool, RelaxAccessControlCheck, false, \ 3267 "Relax the access control checks in the verifier") \ 3268 \ 3269 diagnostic(bool, PrintDTraceDOF, false, \ 3270 "Print the DTrace DOF passed to the system for JSDT probes") \ 3271 \ 3272 product(bool, UseVMInterruptibleIO, false, \ 3273 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3274 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3275 " of this flag is true for JDK 6 and earliers") 3276 3277 3278/* 3279 * Macros for factoring of globals 3280 */ 3281 3282// Interface macros 3283#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3284#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3285#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3286#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3287#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3288#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3289#ifdef PRODUCT 3290#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3291#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3292#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3293#else 3294#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3295#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3296#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3297#endif 3298// Special LP64 flags, product only needed for now. 3299#ifdef _LP64 3300#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3301#else 3302#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3303#endif // _LP64 3304 3305// Implementation macros 3306#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3307#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3308#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3309#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3310#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3311#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3312#ifdef PRODUCT 3313#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3314#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3315#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3316#else 3317#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3318#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3319#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3320#endif 3321#ifdef _LP64 3322#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3323#else 3324#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3325#endif // _LP64 3326 3327RUNTIME_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) 3328 3329RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3330