1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26 #define SHARE_VM_RUNTIME_GLOBALS_HPP 27 28 #include "gc/shared/gc_globals.hpp" 29 #include "utilities/align.hpp" 30 #include "utilities/globalDefinitions.hpp" 31 #include "utilities/macros.hpp" 32 33 #include <float.h> // for DBL_MAX 34 35 // The larger HeapWordSize for 64bit requires larger heaps 36 // for the same application running in 64bit. See bug 4967770. 37 // The minimum alignment to a heap word size is done. Other 38 // parts of the memory system may require additional alignment 39 // and are responsible for those alignments. 40 #ifdef _LP64 41 #define ScaleForWordSize(x) align_down_((x) * 13 / 10, HeapWordSize) 42 #else 43 #define ScaleForWordSize(x) (x) 44 #endif 45 46 // use this for flags that are true per default in the tiered build 47 // but false in non-tiered builds, and vice versa 48 #ifdef TIERED 49 #define trueInTiered true 50 #define falseInTiered false 51 #else 52 #define trueInTiered false 53 #define falseInTiered true 54 #endif 55 56 #include CPU_HEADER(globals) 57 #include OS_HEADER(globals) 58 #include OS_CPU_HEADER(globals) 59 #ifdef COMPILER1 60 #include CPU_HEADER(c1_globals) 61 #include OS_HEADER(c1_globals) 62 #endif 63 #ifdef COMPILER2 64 #include CPU_HEADER(c2_globals) 65 #include OS_HEADER(c2_globals) 66 #endif 67 68 #if !defined(COMPILER1) && !defined(COMPILER2) && !INCLUDE_JVMCI 69 define_pd_global(bool, BackgroundCompilation, false); 70 define_pd_global(bool, UseTLAB, false); 71 define_pd_global(bool, CICompileOSR, false); 72 define_pd_global(bool, UseTypeProfile, false); 73 define_pd_global(bool, UseOnStackReplacement, false); 74 define_pd_global(bool, InlineIntrinsics, false); 75 define_pd_global(bool, PreferInterpreterNativeStubs, true); 76 define_pd_global(bool, ProfileInterpreter, false); 77 define_pd_global(bool, ProfileTraps, false); 78 define_pd_global(bool, TieredCompilation, false); 79 80 define_pd_global(intx, CompileThreshold, 0); 81 82 define_pd_global(intx, OnStackReplacePercentage, 0); 83 define_pd_global(bool, ResizeTLAB, false); 84 define_pd_global(intx, FreqInlineSize, 0); 85 define_pd_global(size_t, NewSizeThreadIncrease, 4*K); 86 define_pd_global(bool, InlineClassNatives, true); 87 define_pd_global(bool, InlineUnsafeOps, true); 88 define_pd_global(uintx, InitialCodeCacheSize, 160*K); 89 define_pd_global(uintx, ReservedCodeCacheSize, 32*M); 90 define_pd_global(uintx, NonProfiledCodeHeapSize, 0); 91 define_pd_global(uintx, ProfiledCodeHeapSize, 0); 92 define_pd_global(uintx, NonNMethodCodeHeapSize, 32*M); 93 94 define_pd_global(uintx, CodeCacheExpansionSize, 32*K); 95 define_pd_global(uintx, CodeCacheMinBlockLength, 1); 96 define_pd_global(uintx, CodeCacheMinimumUseSpace, 200*K); 97 define_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 98 define_pd_global(bool, NeverActAsServerClassMachine, true); 99 define_pd_global(uint64_t,MaxRAM, 1ULL*G); 100 #define CI_COMPILER_COUNT 0 101 #else 102 103 #if COMPILER2_OR_JVMCI 104 #define CI_COMPILER_COUNT 2 105 #else 106 #define CI_COMPILER_COUNT 1 107 #endif // COMPILER2_OR_JVMCI 108 109 #endif // no compilers 110 111 // use this for flags that are true by default in the debug version but 112 // false in the optimized version, and vice versa 113 #ifdef ASSERT 114 #define trueInDebug true 115 #define falseInDebug false 116 #else 117 #define trueInDebug false 118 #define falseInDebug true 119 #endif 120 121 // use this for flags that are true per default in the product build 122 // but false in development builds, and vice versa 123 #ifdef PRODUCT 124 #define trueInProduct true 125 #define falseInProduct false 126 #else 127 #define trueInProduct false 128 #define falseInProduct true 129 #endif 130 131 // develop flags are settable / visible only during development and are constant in the PRODUCT version 132 // product flags are always settable / visible 133 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 134 135 // A flag must be declared with one of the following types: 136 // bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 137 // The type "ccstr" is an alias for "const char*" and is used 138 // only in this file, because the macrology requires single-token type names. 139 140 // Note: Diagnostic options not meant for VM tuning or for product modes. 141 // They are to be used for VM quality assurance or field diagnosis 142 // of VM bugs. They are hidden so that users will not be encouraged to 143 // try them as if they were VM ordinary execution options. However, they 144 // are available in the product version of the VM. Under instruction 145 // from support engineers, VM customers can turn them on to collect 146 // diagnostic information about VM problems. To use a VM diagnostic 147 // option, you must first specify +UnlockDiagnosticVMOptions. 148 // (This master switch also affects the behavior of -Xprintflags.) 149 // 150 // experimental flags are in support of features that are not 151 // part of the officially supported product, but are available 152 // for experimenting with. They could, for example, be performance 153 // features that may not have undergone full or rigorous QA, but which may 154 // help performance in some cases and released for experimentation 155 // by the community of users and developers. This flag also allows one to 156 // be able to build a fully supported product that nonetheless also 157 // ships with some unsupported, lightly tested, experimental features. 158 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 159 // UnlockExperimentalVMOptions flag, which allows the control and 160 // modification of the experimental flags. 161 // 162 // Nota bene: neither diagnostic nor experimental options should be used casually, 163 // and they are not supported on production loads, except under explicit 164 // direction from support engineers. 165 // 166 // manageable flags are writeable external product flags. 167 // They are dynamically writeable through the JDK management interface 168 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 169 // These flags are external exported interface (see CCC). The list of 170 // manageable flags can be queried programmatically through the management 171 // interface. 172 // 173 // A flag can be made as "manageable" only if 174 // - the flag is defined in a CCC as an external exported interface. 175 // - the VM implementation supports dynamic setting of the flag. 176 // This implies that the VM must *always* query the flag variable 177 // and not reuse state related to the flag state at any given time. 178 // - you want the flag to be queried programmatically by the customers. 179 // 180 // product_rw flags are writeable internal product flags. 181 // They are like "manageable" flags but for internal/private use. 182 // The list of product_rw flags are internal/private flags which 183 // may be changed/removed in a future release. It can be set 184 // through the management interface to get/set value 185 // when the name of flag is supplied. 186 // 187 // A flag can be made as "product_rw" only if 188 // - the VM implementation supports dynamic setting of the flag. 189 // This implies that the VM must *always* query the flag variable 190 // and not reuse state related to the flag state at any given time. 191 // 192 // Note that when there is a need to support develop flags to be writeable, 193 // it can be done in the same way as product_rw. 194 // 195 // range is a macro that will expand to min and max arguments for range 196 // checking code if provided - see jvmFlagRangeList.hpp 197 // 198 // constraint is a macro that will expand to custom function call 199 // for constraint checking if provided - see jvmFlagConstraintList.hpp 200 // 201 // writeable is a macro that controls if and how the value can change during the runtime 202 // 203 // writeable(Always) is optional and allows the flag to have its value changed 204 // without any limitations at any time 205 // 206 // writeable(Once) flag value's can be only set once during the lifetime of VM 207 // 208 // writeable(CommandLineOnly) flag value's can be only set from command line 209 // (multiple times allowed) 210 // 211 212 213 #define RUNTIME_FLAGS(develop, \ 214 develop_pd, \ 215 product, \ 216 product_pd, \ 217 diagnostic, \ 218 diagnostic_pd, \ 219 experimental, \ 220 notproduct, \ 221 manageable, \ 222 product_rw, \ 223 lp64_product, \ 224 range, \ 225 constraint, \ 226 writeable) \ 227 \ 228 lp64_product(bool, UseCompressedOops, false, \ 229 "Use 32-bit object references in 64-bit VM. " \ 230 "lp64_product means flag is always constant in 32 bit VM") \ 231 \ 232 lp64_product(bool, UseCompressedClassPointers, false, \ 233 "Use 32-bit class pointers in 64-bit VM. " \ 234 "lp64_product means flag is always constant in 32 bit VM") \ 235 \ 236 notproduct(bool, CheckCompressedOops, true, \ 237 "Generate checks in encoding/decoding code in debug VM") \ 238 \ 239 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 240 "Heap allocation steps through preferred address regions to find" \ 241 " where it can allocate the heap. Number of steps to take per " \ 242 "region.") \ 243 range(1, max_uintx) \ 244 \ 245 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 246 "Default object alignment in bytes, 8 is minimum") \ 247 range(8, 256) \ 248 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 249 \ 250 product(bool, AssumeMP, true, \ 251 "(Deprecated) Instruct the VM to assume multiple processors are available")\ 252 \ 253 /* UseMembar is theoretically a temp flag used for memory barrier */ \ 254 /* removal testing. It was supposed to be removed before FCS but has */ \ 255 /* been re-added (see 6401008) */ \ 256 product_pd(bool, UseMembar, \ 257 "(Unstable) Issues membars on thread state transitions") \ 258 \ 259 develop(bool, CleanChunkPoolAsync, true, \ 260 "Clean the chunk pool asynchronously") \ 261 \ 262 product_pd(bool, ThreadLocalHandshakes, \ 263 "Use thread-local polls instead of global poll for safepoints.") \ 264 constraint(ThreadLocalHandshakesConstraintFunc,AfterErgo) \ 265 \ 266 diagnostic(uint, HandshakeTimeout, 0, \ 267 "If nonzero set a timeout in milliseconds for handshakes") \ 268 \ 269 experimental(bool, AlwaysSafeConstructors, false, \ 270 "Force safe construction, as if all fields are final.") \ 271 \ 272 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 273 "Enable normal processing of flags relating to field diagnostics")\ 274 \ 275 experimental(bool, UnlockExperimentalVMOptions, false, \ 276 "Enable normal processing of flags relating to experimental " \ 277 "features") \ 278 \ 279 product(bool, JavaMonitorsInStackTrace, true, \ 280 "Print information about Java monitor locks when the stacks are" \ 281 "dumped") \ 282 \ 283 product_pd(bool, UseLargePages, \ 284 "Use large page memory") \ 285 \ 286 product_pd(bool, UseLargePagesIndividualAllocation, \ 287 "Allocate large pages individually for better affinity") \ 288 \ 289 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 290 "Fail large pages individual allocation") \ 291 \ 292 product(bool, UseLargePagesInMetaspace, false, \ 293 "Use large page memory in metaspace. " \ 294 "Only used if UseLargePages is enabled.") \ 295 \ 296 product(bool, UseNUMA, false, \ 297 "Use NUMA if available") \ 298 \ 299 product(bool, UseNUMAInterleaving, false, \ 300 "Interleave memory across NUMA nodes if available") \ 301 \ 302 product(size_t, NUMAInterleaveGranularity, 2*M, \ 303 "Granularity to use for NUMA interleaving on Windows OS") \ 304 range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \ 305 \ 306 product(bool, ForceNUMA, false, \ 307 "Force NUMA optimizations on single-node/UMA systems") \ 308 \ 309 product(uintx, NUMAChunkResizeWeight, 20, \ 310 "Percentage (0-100) used to weight the current sample when " \ 311 "computing exponentially decaying average for " \ 312 "AdaptiveNUMAChunkSizing") \ 313 range(0, 100) \ 314 \ 315 product(size_t, NUMASpaceResizeRate, 1*G, \ 316 "Do not reallocate more than this amount per collection") \ 317 range(0, max_uintx) \ 318 \ 319 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 320 "Enable adaptive chunk sizing for NUMA") \ 321 \ 322 product(bool, NUMAStats, false, \ 323 "Print NUMA stats in detailed heap information") \ 324 \ 325 product(uintx, NUMAPageScanRate, 256, \ 326 "Maximum number of pages to include in the page scan procedure") \ 327 range(0, max_uintx) \ 328 \ 329 product_pd(bool, NeedsDeoptSuspend, \ 330 "True for register window machines (sparc/ia64)") \ 331 \ 332 product(intx, UseSSE, 99, \ 333 "Highest supported SSE instructions set on x86/x64") \ 334 range(0, 99) \ 335 \ 336 product(bool, UseAES, false, \ 337 "Control whether AES instructions are used when available") \ 338 \ 339 product(bool, UseFMA, false, \ 340 "Control whether FMA instructions are used when available") \ 341 \ 342 product(bool, UseSHA, false, \ 343 "Control whether SHA instructions are used when available") \ 344 \ 345 diagnostic(bool, UseGHASHIntrinsics, false, \ 346 "Use intrinsics for GHASH versions of crypto") \ 347 \ 348 product(bool, UseBASE64Intrinsics, false, \ 349 "Use intrinsics for java.util.Base64") \ 350 \ 351 product(size_t, LargePageSizeInBytes, 0, \ 352 "Large page size (0 to let VM choose the page size)") \ 353 range(0, max_uintx) \ 354 \ 355 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 356 "Use large pages if maximum heap is at least this big") \ 357 range(0, max_uintx) \ 358 \ 359 product(bool, ForceTimeHighResolution, false, \ 360 "Using high time resolution (for Win32 only)") \ 361 \ 362 develop(bool, TracePcPatching, false, \ 363 "Trace usage of frame::patch_pc") \ 364 \ 365 develop(bool, TraceRelocator, false, \ 366 "Trace the bytecode relocator") \ 367 \ 368 develop(bool, TraceLongCompiles, false, \ 369 "Print out every time compilation is longer than " \ 370 "a given threshold") \ 371 \ 372 develop(bool, SafepointALot, false, \ 373 "Generate a lot of safepoints. This works with " \ 374 "GuaranteedSafepointInterval") \ 375 \ 376 product_pd(bool, BackgroundCompilation, \ 377 "A thread requesting compilation is not blocked during " \ 378 "compilation") \ 379 \ 380 product(bool, PrintVMQWaitTime, false, \ 381 "Print out the waiting time in VM operation queue") \ 382 \ 383 product(bool, MethodFlushing, true, \ 384 "Reclamation of zombie and not-entrant methods") \ 385 \ 386 develop(bool, VerifyStack, false, \ 387 "Verify stack of each thread when it is entering a runtime call") \ 388 \ 389 diagnostic(bool, ForceUnreachable, false, \ 390 "Make all non code cache addresses to be unreachable by " \ 391 "forcing use of 64bit literal fixups") \ 392 \ 393 notproduct(bool, StressDerivedPointers, false, \ 394 "Force scavenge when a derived pointer is detected on stack " \ 395 "after rtm call") \ 396 \ 397 develop(bool, TraceDerivedPointers, false, \ 398 "Trace traversal of derived pointers on stack") \ 399 \ 400 notproduct(bool, TraceCodeBlobStacks, false, \ 401 "Trace stack-walk of codeblobs") \ 402 \ 403 product(bool, PrintJNIResolving, false, \ 404 "Used to implement -v:jni") \ 405 \ 406 notproduct(bool, PrintRewrites, false, \ 407 "Print methods that are being rewritten") \ 408 \ 409 product(bool, UseInlineCaches, true, \ 410 "Use Inline Caches for virtual calls ") \ 411 \ 412 diagnostic(bool, InlineArrayCopy, true, \ 413 "Inline arraycopy native that is known to be part of " \ 414 "base library DLL") \ 415 \ 416 diagnostic(bool, InlineObjectHash, true, \ 417 "Inline Object::hashCode() native that is known to be part " \ 418 "of base library DLL") \ 419 \ 420 diagnostic(bool, InlineNatives, true, \ 421 "Inline natives that are known to be part of base library DLL") \ 422 \ 423 diagnostic(bool, InlineMathNatives, true, \ 424 "Inline SinD, CosD, etc.") \ 425 \ 426 diagnostic(bool, InlineClassNatives, true, \ 427 "Inline Class.isInstance, etc") \ 428 \ 429 diagnostic(bool, InlineThreadNatives, true, \ 430 "Inline Thread.currentThread, etc") \ 431 \ 432 diagnostic(bool, InlineUnsafeOps, true, \ 433 "Inline memory ops (native methods) from Unsafe") \ 434 \ 435 product(bool, CriticalJNINatives, true, \ 436 "Check for critical JNI entry points") \ 437 \ 438 notproduct(bool, StressCriticalJNINatives, false, \ 439 "Exercise register saving code in critical natives") \ 440 \ 441 diagnostic(bool, UseAESIntrinsics, false, \ 442 "Use intrinsics for AES versions of crypto") \ 443 \ 444 diagnostic(bool, UseAESCTRIntrinsics, false, \ 445 "Use intrinsics for the paralleled version of AES/CTR crypto") \ 446 \ 447 diagnostic(bool, UseSHA1Intrinsics, false, \ 448 "Use intrinsics for SHA-1 crypto hash function. " \ 449 "Requires that UseSHA is enabled.") \ 450 \ 451 diagnostic(bool, UseSHA256Intrinsics, false, \ 452 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 453 "Requires that UseSHA is enabled.") \ 454 \ 455 diagnostic(bool, UseSHA512Intrinsics, false, \ 456 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 457 "Requires that UseSHA is enabled.") \ 458 \ 459 diagnostic(bool, UseCRC32Intrinsics, false, \ 460 "use intrinsics for java.util.zip.CRC32") \ 461 \ 462 diagnostic(bool, UseCRC32CIntrinsics, false, \ 463 "use intrinsics for java.util.zip.CRC32C") \ 464 \ 465 diagnostic(bool, UseAdler32Intrinsics, false, \ 466 "use intrinsics for java.util.zip.Adler32") \ 467 \ 468 diagnostic(bool, UseVectorizedMismatchIntrinsic, false, \ 469 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ 470 \ 471 diagnostic(ccstrlist, DisableIntrinsic, "", \ 472 "do not expand intrinsics whose (internal) names appear here") \ 473 \ 474 develop(bool, TraceCallFixup, false, \ 475 "Trace all call fixups") \ 476 \ 477 develop(bool, DeoptimizeALot, false, \ 478 "Deoptimize at every exit from the runtime system") \ 479 \ 480 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 481 "A comma separated list of bcis to deoptimize at") \ 482 \ 483 product(bool, DeoptimizeRandom, false, \ 484 "Deoptimize random frames on random exit from the runtime system")\ 485 \ 486 notproduct(bool, ZombieALot, false, \ 487 "Create zombies (non-entrant) at exit from the runtime system") \ 488 \ 489 notproduct(bool, WalkStackALot, false, \ 490 "Trace stack (no print) at every exit from the runtime system") \ 491 \ 492 product(bool, Debugging, false, \ 493 "Set when executing debug methods in debug.cpp " \ 494 "(to prevent triggering assertions)") \ 495 \ 496 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 497 "Enable strict checks that safepoints cannot happen for threads " \ 498 "that use NoSafepointVerifier") \ 499 \ 500 notproduct(bool, VerifyLastFrame, false, \ 501 "Verify oops on last frame on entry to VM") \ 502 \ 503 product(bool, FailOverToOldVerifier, true, \ 504 "Fail over to old verifier when split verifier fails") \ 505 \ 506 product(bool, SafepointTimeout, false, \ 507 "Time out and warn or fail after SafepointTimeoutDelay " \ 508 "milliseconds if failed to reach safepoint") \ 509 \ 510 develop(bool, DieOnSafepointTimeout, false, \ 511 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 512 \ 513 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 514 /* typically, at most a few retries are needed */ \ 515 product(intx, SuspendRetryCount, 50, \ 516 "Maximum retry count for an external suspend request") \ 517 range(0, max_intx) \ 518 \ 519 product(intx, SuspendRetryDelay, 5, \ 520 "Milliseconds to delay per retry (* current_retry_count)") \ 521 range(0, max_intx) \ 522 \ 523 product(bool, AssertOnSuspendWaitFailure, false, \ 524 "Assert/Guarantee on external suspend wait failure") \ 525 \ 526 product(bool, TraceSuspendWaitFailures, false, \ 527 "Trace external suspend wait failures") \ 528 \ 529 product(bool, MaxFDLimit, true, \ 530 "Bump the number of file descriptors to maximum in Solaris") \ 531 \ 532 diagnostic(bool, LogEvents, true, \ 533 "Enable the various ring buffer event logs") \ 534 \ 535 diagnostic(uintx, LogEventsBufferEntries, 10, \ 536 "Number of ring buffer event logs") \ 537 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 538 \ 539 product(bool, BytecodeVerificationRemote, true, \ 540 "Enable the Java bytecode verifier for remote classes") \ 541 \ 542 product(bool, BytecodeVerificationLocal, false, \ 543 "Enable the Java bytecode verifier for local classes") \ 544 \ 545 develop(bool, ForceFloatExceptions, trueInDebug, \ 546 "Force exceptions on FP stack under/overflow") \ 547 \ 548 develop(bool, VerifyStackAtCalls, false, \ 549 "Verify that the stack pointer is unchanged after calls") \ 550 \ 551 develop(bool, TraceJavaAssertions, false, \ 552 "Trace java language assertions") \ 553 \ 554 notproduct(bool, VerifyCodeCache, false, \ 555 "Verify code cache on memory allocation/deallocation") \ 556 \ 557 develop(bool, UseMallocOnly, false, \ 558 "Use only malloc/free for allocation (no resource area/arena)") \ 559 \ 560 develop(bool, PrintMallocStatistics, false, \ 561 "Print malloc/free statistics") \ 562 \ 563 develop(bool, ZapResourceArea, trueInDebug, \ 564 "Zap freed resource/arena space with 0xABABABAB") \ 565 \ 566 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 567 "Zap freed VM handle space with 0xBCBCBCBC") \ 568 \ 569 notproduct(bool, ZapStackSegments, trueInDebug, \ 570 "Zap allocated/freed stack segments with 0xFADFADED") \ 571 \ 572 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 573 "Zap unused heap space with 0xBAADBABE") \ 574 \ 575 develop(bool, CheckZapUnusedHeapArea, false, \ 576 "Check zapping of unused heap space") \ 577 \ 578 develop(bool, ZapFillerObjects, trueInDebug, \ 579 "Zap filler objects with 0xDEAFBABE") \ 580 \ 581 develop(bool, PrintVMMessages, true, \ 582 "Print VM messages on console") \ 583 \ 584 notproduct(uintx, ErrorHandlerTest, 0, \ 585 "If > 0, provokes an error after VM initialization; the value " \ 586 "determines which error to provoke. See test_error_handler() " \ 587 "in vmError.cpp.") \ 588 \ 589 notproduct(uintx, TestCrashInErrorHandler, 0, \ 590 "If > 0, provokes an error inside VM error handler (a secondary " \ 591 "crash). see test_error_handler() in vmError.cpp") \ 592 \ 593 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 594 "If true, tests SafeFetch inside error handler.") \ 595 \ 596 notproduct(bool, TestUnresponsiveErrorHandler, false, \ 597 "If true, simulates an unresponsive error handler.") \ 598 \ 599 develop(bool, Verbose, false, \ 600 "Print additional debugging information from other modes") \ 601 \ 602 develop(bool, PrintMiscellaneous, false, \ 603 "Print uncategorized debugging information (requires +Verbose)") \ 604 \ 605 develop(bool, WizardMode, false, \ 606 "Print much more debugging information") \ 607 \ 608 product(bool, ShowMessageBoxOnError, false, \ 609 "Keep process alive on VM fatal error") \ 610 \ 611 product(bool, CreateCoredumpOnCrash, true, \ 612 "Create core/mini dump on VM fatal error") \ 613 \ 614 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 615 "Timeout, in seconds, to limit the time spent on writing an " \ 616 "error log in case of a crash.") \ 617 range(0, (uint64_t)max_jlong/1000) \ 618 \ 619 product_pd(bool, UseOSErrorReporting, \ 620 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 621 \ 622 product(bool, SuppressFatalErrorMessage, false, \ 623 "Report NO fatal error message (avoid deadlock)") \ 624 \ 625 product(ccstrlist, OnError, "", \ 626 "Run user-defined commands on fatal error; see VMError.cpp " \ 627 "for examples") \ 628 \ 629 product(ccstrlist, OnOutOfMemoryError, "", \ 630 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 631 \ 632 manageable(bool, HeapDumpBeforeFullGC, false, \ 633 "Dump heap to file before any major stop-the-world GC") \ 634 \ 635 manageable(bool, HeapDumpAfterFullGC, false, \ 636 "Dump heap to file after any major stop-the-world GC") \ 637 \ 638 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 639 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 640 \ 641 manageable(ccstr, HeapDumpPath, NULL, \ 642 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 643 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 644 "in the working directory)") \ 645 \ 646 develop(bool, BreakAtWarning, false, \ 647 "Execute breakpoint upon encountering VM warning") \ 648 \ 649 develop(bool, UseFakeTimers, false, \ 650 "Tell whether the VM should use system time or a fake timer") \ 651 \ 652 product(ccstr, NativeMemoryTracking, "off", \ 653 "Native memory tracking options") \ 654 \ 655 diagnostic(bool, PrintNMTStatistics, false, \ 656 "Print native memory tracking summary data if it is on") \ 657 \ 658 diagnostic(bool, LogCompilation, false, \ 659 "Log compilation activity in detail to LogFile") \ 660 \ 661 product(bool, PrintCompilation, false, \ 662 "Print compilations") \ 663 \ 664 product(bool, PrintExtendedThreadInfo, false, \ 665 "Print more information in thread dump") \ 666 \ 667 diagnostic(bool, TraceNMethodInstalls, false, \ 668 "Trace nmethod installation") \ 669 \ 670 diagnostic(intx, ScavengeRootsInCode, 2, \ 671 "0: do not allow scavengable oops in the code cache; " \ 672 "1: allow scavenging from the code cache; " \ 673 "2: emit as many constants as the compiler can see") \ 674 range(0, 2) \ 675 \ 676 product(bool, AlwaysRestoreFPU, false, \ 677 "Restore the FPU control word after every JNI call (expensive)") \ 678 \ 679 diagnostic(bool, PrintCompilation2, false, \ 680 "Print additional statistics per compilation") \ 681 \ 682 diagnostic(bool, PrintAdapterHandlers, false, \ 683 "Print code generated for i2c/c2i adapters") \ 684 \ 685 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 686 "Verify that i2c/c2i adapters are called properly") \ 687 \ 688 develop(bool, VerifyAdapterSharing, false, \ 689 "Verify that the code for shared adapters is the equivalent") \ 690 \ 691 diagnostic(bool, PrintAssembly, false, \ 692 "Print assembly code (using external disassembler.so)") \ 693 \ 694 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 695 "Print options string passed to disassembler.so") \ 696 \ 697 notproduct(bool, PrintNMethodStatistics, false, \ 698 "Print a summary statistic for the generated nmethods") \ 699 \ 700 diagnostic(bool, PrintNMethods, false, \ 701 "Print assembly code for nmethods when generated") \ 702 \ 703 diagnostic(bool, PrintNativeNMethods, false, \ 704 "Print assembly code for native nmethods when generated") \ 705 \ 706 develop(bool, PrintDebugInfo, false, \ 707 "Print debug information for all nmethods when generated") \ 708 \ 709 develop(bool, PrintRelocations, false, \ 710 "Print relocation information for all nmethods when generated") \ 711 \ 712 develop(bool, PrintDependencies, false, \ 713 "Print dependency information for all nmethods when generated") \ 714 \ 715 develop(bool, PrintExceptionHandlers, false, \ 716 "Print exception handler tables for all nmethods when generated") \ 717 \ 718 develop(bool, StressCompiledExceptionHandlers, false, \ 719 "Exercise compiled exception handlers") \ 720 \ 721 develop(bool, InterceptOSException, false, \ 722 "Start debugger when an implicit OS (e.g. NULL) " \ 723 "exception happens") \ 724 \ 725 product(bool, PrintCodeCache, false, \ 726 "Print the code cache memory usage when exiting") \ 727 \ 728 develop(bool, PrintCodeCache2, false, \ 729 "Print detailed usage information on the code cache when exiting")\ 730 \ 731 product(bool, PrintCodeCacheOnCompilation, false, \ 732 "Print the code cache memory usage each time a method is " \ 733 "compiled") \ 734 \ 735 diagnostic(bool, PrintStubCode, false, \ 736 "Print generated stub code") \ 737 \ 738 product(bool, StackTraceInThrowable, true, \ 739 "Collect backtrace in throwable when exception happens") \ 740 \ 741 product(bool, OmitStackTraceInFastThrow, true, \ 742 "Omit backtraces for some 'hot' exceptions in optimized code") \ 743 \ 744 product(bool, ProfilerPrintByteCodeStatistics, false, \ 745 "Print bytecode statistics when dumping profiler output") \ 746 \ 747 product(bool, ProfilerRecordPC, false, \ 748 "Collect ticks for each 16 byte interval of compiled code") \ 749 \ 750 product(bool, ProfileVM, false, \ 751 "Profile ticks that fall within VM (either in the VM Thread " \ 752 "or VM code called through stubs)") \ 753 \ 754 product(bool, ProfileIntervals, false, \ 755 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 756 \ 757 notproduct(bool, ProfilerCheckIntervals, false, \ 758 "Collect and print information on spacing of profiler ticks") \ 759 \ 760 product(bool, PrintWarnings, true, \ 761 "Print JVM warnings to output stream") \ 762 \ 763 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 764 "Print warnings for stalled SpinLocks") \ 765 \ 766 product(bool, RegisterFinalizersAtInit, true, \ 767 "Register finalizable objects at end of Object.<init> or " \ 768 "after allocation") \ 769 \ 770 develop(bool, RegisterReferences, true, \ 771 "Tell whether the VM should register soft/weak/final/phantom " \ 772 "references") \ 773 \ 774 develop(bool, IgnoreRewrites, false, \ 775 "Suppress rewrites of bytecodes in the oopmap generator. " \ 776 "This is unsafe!") \ 777 \ 778 develop(bool, PrintCodeCacheExtension, false, \ 779 "Print extension of code cache") \ 780 \ 781 develop(bool, UsePrivilegedStack, true, \ 782 "Enable the security JVM functions") \ 783 \ 784 develop(bool, ProtectionDomainVerification, true, \ 785 "Verify protection domain before resolution in system dictionary")\ 786 \ 787 product(bool, ClassUnloading, true, \ 788 "Do unloading of classes") \ 789 \ 790 product(bool, ClassUnloadingWithConcurrentMark, true, \ 791 "Do unloading of classes with a concurrent marking cycle") \ 792 \ 793 develop(bool, DisableStartThread, false, \ 794 "Disable starting of additional Java threads " \ 795 "(for debugging only)") \ 796 \ 797 develop(bool, MemProfiling, false, \ 798 "Write memory usage profiling to log file") \ 799 \ 800 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 801 "Print the system dictionary at exit") \ 802 \ 803 diagnostic(bool, DynamicallyResizeSystemDictionaries, true, \ 804 "Dynamically resize system dictionaries as needed") \ 805 \ 806 product(bool, AlwaysLockClassLoader, false, \ 807 "Require the VM to acquire the class loader lock before calling " \ 808 "loadClass() even for class loaders registering " \ 809 "as parallel capable") \ 810 \ 811 product(bool, AllowParallelDefineClass, false, \ 812 "Allow parallel defineClass requests for class loaders " \ 813 "registering as parallel capable") \ 814 \ 815 product_pd(bool, DontYieldALot, \ 816 "Throw away obvious excess yield calls") \ 817 \ 818 develop(bool, UseDetachedThreads, true, \ 819 "Use detached threads that are recycled upon termination " \ 820 "(for Solaris only)") \ 821 \ 822 experimental(bool, DisablePrimordialThreadGuardPages, false, \ 823 "Disable the use of stack guard pages if the JVM is loaded " \ 824 "on the primordial process thread") \ 825 \ 826 product(bool, UseLWPSynchronization, true, \ 827 "Use LWP-based instead of libthread-based synchronization " \ 828 "(SPARC only)") \ 829 \ 830 product(intx, MonitorBound, 0, "Bound Monitor population") \ 831 range(0, max_jint) \ 832 \ 833 product(bool, MonitorInUseLists, true, "Track Monitors for Deflation") \ 834 \ 835 experimental(intx, MonitorUsedDeflationThreshold, 90, \ 836 "Percentage of used monitors before triggering cleanup " \ 837 "safepoint which deflates monitors (0 is off). " \ 838 "The check is performed on GuaranteedSafepointInterval.") \ 839 range(0, 100) \ 840 \ 841 experimental(intx, hashCode, 5, \ 842 "(Unstable) select hashCode generation algorithm") \ 843 \ 844 product(bool, FilterSpuriousWakeups, true, \ 845 "When true prevents OS-level spurious, or premature, wakeups " \ 846 "from Object.wait (Ignored for Windows)") \ 847 \ 848 develop(bool, UsePthreads, false, \ 849 "Use pthread-based instead of libthread-based synchronization " \ 850 "(SPARC only)") \ 851 \ 852 product(bool, ReduceSignalUsage, false, \ 853 "Reduce the use of OS signals in Java and/or the VM") \ 854 \ 855 develop_pd(bool, ShareVtableStubs, \ 856 "Share vtable stubs (smaller code but worse branch prediction") \ 857 \ 858 develop(bool, LoadLineNumberTables, true, \ 859 "Tell whether the class file parser loads line number tables") \ 860 \ 861 develop(bool, LoadLocalVariableTables, true, \ 862 "Tell whether the class file parser loads local variable tables") \ 863 \ 864 develop(bool, LoadLocalVariableTypeTables, true, \ 865 "Tell whether the class file parser loads local variable type" \ 866 "tables") \ 867 \ 868 product(bool, AllowUserSignalHandlers, false, \ 869 "Do not complain if the application installs signal handlers " \ 870 "(Solaris & Linux only)") \ 871 \ 872 product(bool, UseSignalChaining, true, \ 873 "Use signal-chaining to invoke signal handlers installed " \ 874 "by the application (Solaris & Linux only)") \ 875 \ 876 product(bool, AllowJNIEnvProxy, false, \ 877 "Allow JNIEnv proxies for jdbx") \ 878 \ 879 product(bool, RestoreMXCSROnJNICalls, false, \ 880 "Restore MXCSR when returning from JNI calls") \ 881 \ 882 product(bool, CheckJNICalls, false, \ 883 "Verify all arguments to JNI calls") \ 884 \ 885 product(bool, UseFastJNIAccessors, true, \ 886 "Use optimized versions of Get<Primitive>Field") \ 887 \ 888 product(intx, MaxJNILocalCapacity, 65536, \ 889 "Maximum allowable local JNI handle capacity to " \ 890 "EnsureLocalCapacity() and PushLocalFrame(), " \ 891 "where <= 0 is unlimited, default: 65536") \ 892 range(min_intx, max_intx) \ 893 \ 894 product(bool, EagerXrunInit, false, \ 895 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 896 "but not all -Xrun libraries may support the state of the VM " \ 897 "at this time") \ 898 \ 899 product(bool, PreserveAllAnnotations, false, \ 900 "Preserve RuntimeInvisibleAnnotations as well " \ 901 "as RuntimeVisibleAnnotations") \ 902 \ 903 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 904 "Number of OutOfMemoryErrors preallocated with backtrace") \ 905 \ 906 product(bool, UseXMMForArrayCopy, false, \ 907 "Use SSE2 MOVQ instruction for Arraycopy") \ 908 \ 909 product(intx, FieldsAllocationStyle, 1, \ 910 "0 - type based with oops first, " \ 911 "1 - with oops last, " \ 912 "2 - oops in super and sub classes are together") \ 913 range(0, 2) \ 914 \ 915 product(bool, CompactFields, true, \ 916 "Allocate nonstatic fields in gaps between previous fields") \ 917 \ 918 notproduct(bool, PrintFieldLayout, false, \ 919 "Print field layout for each class") \ 920 \ 921 /* Need to limit the extent of the padding to reasonable size. */\ 922 /* 8K is well beyond the reasonable HW cache line size, even with */\ 923 /* aggressive prefetching, while still leaving the room for segregating */\ 924 /* among the distinct pages. */\ 925 product(intx, ContendedPaddingWidth, 128, \ 926 "How many bytes to pad the fields/classes marked @Contended with")\ 927 range(0, 8192) \ 928 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 929 \ 930 product(bool, EnableContended, true, \ 931 "Enable @Contended annotation support") \ 932 \ 933 product(bool, RestrictContended, true, \ 934 "Restrict @Contended to trusted classes") \ 935 \ 936 product(bool, UseBiasedLocking, true, \ 937 "Enable biased locking in JVM") \ 938 \ 939 product(intx, BiasedLockingStartupDelay, 0, \ 940 "Number of milliseconds to wait before enabling biased locking") \ 941 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 942 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 943 \ 944 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 945 "Print statistics of biased locking in JVM") \ 946 \ 947 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 948 "Threshold of number of revocations per type to try to " \ 949 "rebias all objects in the heap of that type") \ 950 range(0, max_intx) \ 951 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 952 \ 953 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 954 "Threshold of number of revocations per type to permanently " \ 955 "revoke biases of all objects in the heap of that type") \ 956 range(0, max_intx) \ 957 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 958 \ 959 product(intx, BiasedLockingDecayTime, 25000, \ 960 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 961 "type after previous bulk rebias") \ 962 range(500, max_intx) \ 963 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 964 \ 965 product(bool, ExitOnOutOfMemoryError, false, \ 966 "JVM exits on the first occurrence of an out-of-memory error") \ 967 \ 968 product(bool, CrashOnOutOfMemoryError, false, \ 969 "JVM aborts, producing an error log and core/mini dump, on the " \ 970 "first occurrence of an out-of-memory error") \ 971 \ 972 /* tracing */ \ 973 \ 974 develop(bool, StressRewriter, false, \ 975 "Stress linktime bytecode rewriting") \ 976 \ 977 product(ccstr, TraceJVMTI, NULL, \ 978 "Trace flags for JVMTI functions and events") \ 979 \ 980 /* This option can change an EMCP method into an obsolete method. */ \ 981 /* This can affect tests that except specific methods to be EMCP. */ \ 982 /* This option should be used with caution. */ \ 983 product(bool, StressLdcRewrite, false, \ 984 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 985 \ 986 /* change to false by default sometime after Mustang */ \ 987 product(bool, VerifyMergedCPBytecodes, true, \ 988 "Verify bytecodes after RedefineClasses constant pool merging") \ 989 \ 990 develop(bool, TraceBytecodes, false, \ 991 "Trace bytecode execution") \ 992 \ 993 develop(bool, TraceICs, false, \ 994 "Trace inline cache changes") \ 995 \ 996 notproduct(bool, TraceInvocationCounterOverflow, false, \ 997 "Trace method invocation counter overflow") \ 998 \ 999 develop(bool, TraceInlineCacheClearing, false, \ 1000 "Trace clearing of inline caches in nmethods") \ 1001 \ 1002 develop(bool, TraceDependencies, false, \ 1003 "Trace dependencies") \ 1004 \ 1005 develop(bool, VerifyDependencies, trueInDebug, \ 1006 "Exercise and verify the compilation dependency mechanism") \ 1007 \ 1008 develop(bool, TraceNewOopMapGeneration, false, \ 1009 "Trace OopMapGeneration") \ 1010 \ 1011 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1012 "Trace OopMapGeneration: print detailed cell states") \ 1013 \ 1014 develop(bool, TimeOopMap, false, \ 1015 "Time calls to GenerateOopMap::compute_map() in sum") \ 1016 \ 1017 develop(bool, TimeOopMap2, false, \ 1018 "Time calls to GenerateOopMap::compute_map() individually") \ 1019 \ 1020 develop(bool, TraceOopMapRewrites, false, \ 1021 "Trace rewriting of method oops during oop map generation") \ 1022 \ 1023 develop(bool, TraceICBuffer, false, \ 1024 "Trace usage of IC buffer") \ 1025 \ 1026 develop(bool, TraceCompiledIC, false, \ 1027 "Trace changes of compiled IC") \ 1028 \ 1029 develop(bool, FLSVerifyDictionary, false, \ 1030 "Do lots of (expensive) FLS dictionary verification") \ 1031 \ 1032 \ 1033 notproduct(bool, CheckMemoryInitialization, false, \ 1034 "Check memory initialization") \ 1035 \ 1036 product(uintx, ProcessDistributionStride, 4, \ 1037 "Stride through processors when distributing processes") \ 1038 range(0, max_juint) \ 1039 \ 1040 develop(bool, TraceFinalizerRegistration, false, \ 1041 "Trace registration of final references") \ 1042 \ 1043 product(bool, IgnoreEmptyClassPaths, false, \ 1044 "Ignore empty path elements in -classpath") \ 1045 \ 1046 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 1047 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 1048 "Initial size of the boot class loader data metaspace") \ 1049 range(30*K, max_uintx/BytesPerWord) \ 1050 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 1051 \ 1052 product(bool, PrintHeapAtSIGBREAK, true, \ 1053 "Print heap layout in response to SIGBREAK") \ 1054 \ 1055 manageable(bool, PrintClassHistogram, false, \ 1056 "Print a histogram of class instances") \ 1057 \ 1058 develop(bool, IgnoreLibthreadGPFault, false, \ 1059 "Suppress workaround for libthread GP fault") \ 1060 \ 1061 experimental(double, ObjectCountCutOffPercent, 0.5, \ 1062 "The percentage of the used heap that the instances of a class " \ 1063 "must occupy for the class to generate a trace event") \ 1064 range(0.0, 100.0) \ 1065 \ 1066 /* JVMTI heap profiling */ \ 1067 \ 1068 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 1069 "Trace JVMTI object tagging calls") \ 1070 \ 1071 diagnostic(bool, VerifyBeforeIteration, false, \ 1072 "Verify memory system before JVMTI iteration") \ 1073 \ 1074 /* compiler interface */ \ 1075 \ 1076 develop(bool, CIPrintCompilerName, false, \ 1077 "when CIPrint is active, print the name of the active compiler") \ 1078 \ 1079 diagnostic(bool, CIPrintCompileQueue, false, \ 1080 "display the contents of the compile queue whenever a " \ 1081 "compilation is enqueued") \ 1082 \ 1083 develop(bool, CIPrintRequests, false, \ 1084 "display every request for compilation") \ 1085 \ 1086 product(bool, CITime, false, \ 1087 "collect timing information for compilation") \ 1088 \ 1089 develop(bool, CITimeVerbose, false, \ 1090 "be more verbose in compilation timings") \ 1091 \ 1092 develop(bool, CITimeEach, false, \ 1093 "display timing information after each successful compilation") \ 1094 \ 1095 develop(bool, CICountOSR, false, \ 1096 "use a separate counter when assigning ids to osr compilations") \ 1097 \ 1098 develop(bool, CICompileNatives, true, \ 1099 "compile native methods if supported by the compiler") \ 1100 \ 1101 develop_pd(bool, CICompileOSR, \ 1102 "compile on stack replacement methods if supported by the " \ 1103 "compiler") \ 1104 \ 1105 develop(bool, CIPrintMethodCodes, false, \ 1106 "print method bytecodes of the compiled code") \ 1107 \ 1108 develop(bool, CIPrintTypeFlow, false, \ 1109 "print the results of ciTypeFlow analysis") \ 1110 \ 1111 develop(bool, CITraceTypeFlow, false, \ 1112 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 1113 \ 1114 develop(intx, OSROnlyBCI, -1, \ 1115 "OSR only at this bci. Negative values mean exclude that bci") \ 1116 \ 1117 /* compiler */ \ 1118 \ 1119 /* notice: the max range value here is max_jint, not max_intx */ \ 1120 /* because of overflow issue */ \ 1121 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 1122 "Number of compiler threads to run") \ 1123 range(0, max_jint) \ 1124 constraint(CICompilerCountConstraintFunc, AfterErgo) \ 1125 \ 1126 product(bool, UseDynamicNumberOfCompilerThreads, true, \ 1127 "Dynamically choose the number of parallel compiler threads") \ 1128 \ 1129 diagnostic(bool, ReduceNumberOfCompilerThreads, true, \ 1130 "Reduce the number of parallel compiler threads when they " \ 1131 "are not used") \ 1132 \ 1133 diagnostic(bool, TraceCompilerThreads, false, \ 1134 "Trace creation and removal of compiler threads") \ 1135 \ 1136 develop(bool, InjectCompilerCreationFailure, false, \ 1137 "Inject thread creation failures for " \ 1138 "UseDynamicNumberOfCompilerThreads") \ 1139 \ 1140 product(intx, CompilationPolicyChoice, 0, \ 1141 "which compilation policy (0-2)") \ 1142 range(0, 2) \ 1143 \ 1144 develop(bool, UseStackBanging, true, \ 1145 "use stack banging for stack overflow checks (required for " \ 1146 "proper StackOverflow handling; disable only to measure cost " \ 1147 "of stackbanging)") \ 1148 \ 1149 develop(bool, UseStrictFP, true, \ 1150 "use strict fp if modifier strictfp is set") \ 1151 \ 1152 develop(bool, GenerateSynchronizationCode, true, \ 1153 "generate locking/unlocking code for synchronized methods and " \ 1154 "monitors") \ 1155 \ 1156 develop(bool, GenerateRangeChecks, true, \ 1157 "Generate range checks for array accesses") \ 1158 \ 1159 diagnostic_pd(bool, ImplicitNullChecks, \ 1160 "Generate code for implicit null checks") \ 1161 \ 1162 product_pd(bool, TrapBasedNullChecks, \ 1163 "Generate code for null checks that uses a cmp and trap " \ 1164 "instruction raising SIGTRAP. This is only used if an access to" \ 1165 "null (+offset) will not raise a SIGSEGV, i.e.," \ 1166 "ImplicitNullChecks don't work (PPC64).") \ 1167 \ 1168 diagnostic(bool, EnableThreadSMRExtraValidityChecks, true, \ 1169 "Enable Thread SMR extra validity checks") \ 1170 \ 1171 diagnostic(bool, EnableThreadSMRStatistics, trueInDebug, \ 1172 "Enable Thread SMR Statistics") \ 1173 \ 1174 product(bool, Inline, true, \ 1175 "Enable inlining") \ 1176 \ 1177 product(bool, ClipInlining, true, \ 1178 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 1179 \ 1180 develop(bool, UseCHA, true, \ 1181 "Enable CHA") \ 1182 \ 1183 product(bool, UseTypeProfile, true, \ 1184 "Check interpreter profile for historically monomorphic calls") \ 1185 \ 1186 diagnostic(bool, PrintInlining, false, \ 1187 "Print inlining optimizations") \ 1188 \ 1189 product(bool, UsePopCountInstruction, false, \ 1190 "Use population count instruction") \ 1191 \ 1192 develop(bool, EagerInitialization, false, \ 1193 "Eagerly initialize classes if possible") \ 1194 \ 1195 diagnostic(bool, LogTouchedMethods, false, \ 1196 "Log methods which have been ever touched in runtime") \ 1197 \ 1198 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 1199 "Print all methods that have been ever touched in runtime") \ 1200 \ 1201 develop(bool, TraceMethodReplacement, false, \ 1202 "Print when methods are replaced do to recompilation") \ 1203 \ 1204 develop(bool, PrintMethodFlushing, false, \ 1205 "Print the nmethods being flushed") \ 1206 \ 1207 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 1208 "print statistics about method flushing") \ 1209 \ 1210 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 1211 "Number of compiled code invocations after which " \ 1212 "the method is considered as hot by the flusher") \ 1213 range(1, max_jint) \ 1214 \ 1215 diagnostic(intx, MinPassesBeforeFlush, 10, \ 1216 "Minimum number of sweeper passes before an nmethod " \ 1217 "can be flushed") \ 1218 range(0, max_intx) \ 1219 \ 1220 product(bool, UseCodeAging, true, \ 1221 "Insert counter to detect warm methods") \ 1222 \ 1223 diagnostic(bool, StressCodeAging, false, \ 1224 "Start with counters compiled in") \ 1225 \ 1226 develop(bool, StressCodeBuffers, false, \ 1227 "Exercise code buffer expansion and other rare state changes") \ 1228 \ 1229 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 1230 "Generate extra debugging information for non-safepoints in " \ 1231 "nmethods") \ 1232 \ 1233 product(bool, PrintVMOptions, false, \ 1234 "Print flags that appeared on the command line") \ 1235 \ 1236 product(bool, IgnoreUnrecognizedVMOptions, false, \ 1237 "Ignore unrecognized VM options") \ 1238 \ 1239 product(bool, PrintCommandLineFlags, false, \ 1240 "Print flags specified on command line or set by ergonomics") \ 1241 \ 1242 product(bool, PrintFlagsInitial, false, \ 1243 "Print all VM flags before argument processing and exit VM") \ 1244 \ 1245 product(bool, PrintFlagsFinal, false, \ 1246 "Print all VM flags after argument and ergonomic processing") \ 1247 \ 1248 notproduct(bool, PrintFlagsWithComments, false, \ 1249 "Print all VM flags with default values and descriptions and " \ 1250 "exit") \ 1251 \ 1252 product(bool, PrintFlagsRanges, false, \ 1253 "Print VM flags and their ranges and exit VM") \ 1254 \ 1255 diagnostic(bool, SerializeVMOutput, true, \ 1256 "Use a mutex to serialize output to tty and LogFile") \ 1257 \ 1258 diagnostic(bool, DisplayVMOutput, true, \ 1259 "Display all VM output on the tty, independently of LogVMOutput") \ 1260 \ 1261 diagnostic(bool, LogVMOutput, false, \ 1262 "Save VM output to LogFile") \ 1263 \ 1264 diagnostic(ccstr, LogFile, NULL, \ 1265 "If LogVMOutput or LogCompilation is on, save VM output to " \ 1266 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 1267 \ 1268 product(ccstr, ErrorFile, NULL, \ 1269 "If an error occurs, save the error data to this file " \ 1270 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 1271 \ 1272 product(bool, DisplayVMOutputToStderr, false, \ 1273 "If DisplayVMOutput is true, display all VM output to stderr") \ 1274 \ 1275 product(bool, DisplayVMOutputToStdout, false, \ 1276 "If DisplayVMOutput is true, display all VM output to stdout") \ 1277 \ 1278 product(bool, UseHeavyMonitors, false, \ 1279 "use heavyweight instead of lightweight Java monitors") \ 1280 \ 1281 product(bool, PrintStringTableStatistics, false, \ 1282 "print statistics about the StringTable and SymbolTable") \ 1283 \ 1284 diagnostic(bool, VerifyStringTableAtExit, false, \ 1285 "verify StringTable contents at exit") \ 1286 \ 1287 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 1288 "print histogram of the symbol table") \ 1289 \ 1290 notproduct(bool, ExitVMOnVerifyError, false, \ 1291 "standard exit from VM if bytecode verify error " \ 1292 "(only in debug mode)") \ 1293 \ 1294 diagnostic(ccstr, AbortVMOnException, NULL, \ 1295 "Call fatal if this exception is thrown. Example: " \ 1296 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 1297 \ 1298 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 1299 "Call fatal if the exception pointed by AbortVMOnException " \ 1300 "has this message") \ 1301 \ 1302 develop(bool, DebugVtables, false, \ 1303 "add debugging code to vtable dispatch") \ 1304 \ 1305 notproduct(bool, PrintVtableStats, false, \ 1306 "print vtables stats at end of run") \ 1307 \ 1308 develop(bool, TraceCreateZombies, false, \ 1309 "trace creation of zombie nmethods") \ 1310 \ 1311 notproduct(bool, IgnoreLockingAssertions, false, \ 1312 "disable locking assertions (for speed)") \ 1313 \ 1314 product(bool, RangeCheckElimination, true, \ 1315 "Eliminate range checks") \ 1316 \ 1317 develop_pd(bool, UncommonNullCast, \ 1318 "track occurrences of null in casts; adjust compiler tactics") \ 1319 \ 1320 develop(bool, TypeProfileCasts, true, \ 1321 "treat casts like calls for purposes of type profiling") \ 1322 \ 1323 develop(bool, DelayCompilationDuringStartup, true, \ 1324 "Delay invoking the compiler until main application class is " \ 1325 "loaded") \ 1326 \ 1327 develop(bool, CompileTheWorld, false, \ 1328 "Compile all methods in all classes in bootstrap class path " \ 1329 "(stress test)") \ 1330 \ 1331 develop(bool, CompileTheWorldPreloadClasses, true, \ 1332 "Preload all classes used by a class before start loading") \ 1333 \ 1334 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 1335 "Force a safepoint every n compiles so sweeper can keep up") \ 1336 \ 1337 develop(bool, FillDelaySlots, true, \ 1338 "Fill delay slots (on SPARC only)") \ 1339 \ 1340 develop(bool, TimeLivenessAnalysis, false, \ 1341 "Time computation of bytecode liveness analysis") \ 1342 \ 1343 develop(bool, TraceLivenessGen, false, \ 1344 "Trace the generation of liveness analysis information") \ 1345 \ 1346 notproduct(bool, TraceLivenessQuery, false, \ 1347 "Trace queries of liveness analysis information") \ 1348 \ 1349 notproduct(bool, CollectIndexSetStatistics, false, \ 1350 "Collect information about IndexSets") \ 1351 \ 1352 develop(bool, UseLoopSafepoints, true, \ 1353 "Generate Safepoint nodes in every loop") \ 1354 \ 1355 develop(intx, FastAllocateSizeLimit, 128*K, \ 1356 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 1357 "Inline allocations larger than this in doublewords must go slow")\ 1358 \ 1359 product(bool, AggressiveOpts, false, \ 1360 "(Deprecated) Enable aggressive optimizations - see arguments.cpp") \ 1361 \ 1362 product_pd(bool, CompactStrings, \ 1363 "Enable Strings to use single byte chars in backing store") \ 1364 \ 1365 product_pd(uintx, TypeProfileLevel, \ 1366 "=XYZ, with Z: Type profiling of arguments at call; " \ 1367 "Y: Type profiling of return value at call; " \ 1368 "X: Type profiling of parameters to methods; " \ 1369 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 1370 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 1371 \ 1372 product(intx, TypeProfileArgsLimit, 2, \ 1373 "max number of call arguments to consider for type profiling") \ 1374 range(0, 16) \ 1375 \ 1376 product(intx, TypeProfileParmsLimit, 2, \ 1377 "max number of incoming parameters to consider for type profiling"\ 1378 ", -1 for all") \ 1379 range(-1, 64) \ 1380 \ 1381 /* statistics */ \ 1382 develop(bool, CountCompiledCalls, false, \ 1383 "Count method invocations") \ 1384 \ 1385 notproduct(bool, CountRuntimeCalls, false, \ 1386 "Count VM runtime calls") \ 1387 \ 1388 develop(bool, CountJNICalls, false, \ 1389 "Count jni method invocations") \ 1390 \ 1391 notproduct(bool, CountJVMCalls, false, \ 1392 "Count jvm method invocations") \ 1393 \ 1394 notproduct(bool, CountRemovableExceptions, false, \ 1395 "Count exceptions that could be replaced by branches due to " \ 1396 "inlining") \ 1397 \ 1398 notproduct(bool, ICMissHistogram, false, \ 1399 "Produce histogram of IC misses") \ 1400 \ 1401 /* interpreter */ \ 1402 product_pd(bool, RewriteBytecodes, \ 1403 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 1404 \ 1405 product_pd(bool, RewriteFrequentPairs, \ 1406 "Rewrite frequently used bytecode pairs into a single bytecode") \ 1407 \ 1408 diagnostic(bool, PrintInterpreter, false, \ 1409 "Print the generated interpreter code") \ 1410 \ 1411 product(bool, UseInterpreter, true, \ 1412 "Use interpreter for non-compiled methods") \ 1413 \ 1414 develop(bool, UseFastSignatureHandlers, true, \ 1415 "Use fast signature handlers for native calls") \ 1416 \ 1417 product(bool, UseLoopCounter, true, \ 1418 "Increment invocation counter on backward branch") \ 1419 \ 1420 product_pd(bool, UseOnStackReplacement, \ 1421 "Use on stack replacement, calls runtime if invoc. counter " \ 1422 "overflows in loop") \ 1423 \ 1424 notproduct(bool, TraceOnStackReplacement, false, \ 1425 "Trace on stack replacement") \ 1426 \ 1427 product_pd(bool, PreferInterpreterNativeStubs, \ 1428 "Use always interpreter stubs for native methods invoked via " \ 1429 "interpreter") \ 1430 \ 1431 develop(bool, CountBytecodes, false, \ 1432 "Count number of bytecodes executed") \ 1433 \ 1434 develop(bool, PrintBytecodeHistogram, false, \ 1435 "Print histogram of the executed bytecodes") \ 1436 \ 1437 develop(bool, PrintBytecodePairHistogram, false, \ 1438 "Print histogram of the executed bytecode pairs") \ 1439 \ 1440 diagnostic(bool, PrintSignatureHandlers, false, \ 1441 "Print code generated for native method signature handlers") \ 1442 \ 1443 develop(bool, VerifyOops, false, \ 1444 "Do plausibility checks for oops") \ 1445 \ 1446 develop(bool, CheckUnhandledOops, false, \ 1447 "Check for unhandled oops in VM code") \ 1448 \ 1449 develop(bool, VerifyJNIFields, trueInDebug, \ 1450 "Verify jfieldIDs for instance fields") \ 1451 \ 1452 notproduct(bool, VerifyJNIEnvThread, false, \ 1453 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 1454 "from JNI") \ 1455 \ 1456 develop(bool, VerifyFPU, false, \ 1457 "Verify FPU state (check for NaN's, etc.)") \ 1458 \ 1459 develop(bool, VerifyThread, false, \ 1460 "Watch the thread register for corruption (SPARC only)") \ 1461 \ 1462 develop(bool, VerifyActivationFrameSize, false, \ 1463 "Verify that activation frame didn't become smaller than its " \ 1464 "minimal size") \ 1465 \ 1466 develop(bool, TraceFrequencyInlining, false, \ 1467 "Trace frequency based inlining") \ 1468 \ 1469 develop_pd(bool, InlineIntrinsics, \ 1470 "Inline intrinsics that can be statically resolved") \ 1471 \ 1472 product_pd(bool, ProfileInterpreter, \ 1473 "Profile at the bytecode level during interpretation") \ 1474 \ 1475 develop(bool, TraceProfileInterpreter, false, \ 1476 "Trace profiling at the bytecode level during interpretation. " \ 1477 "This outputs the profiling information collected to improve " \ 1478 "jit compilation.") \ 1479 \ 1480 develop_pd(bool, ProfileTraps, \ 1481 "Profile deoptimization traps at the bytecode level") \ 1482 \ 1483 product(intx, ProfileMaturityPercentage, 20, \ 1484 "number of method invocations/branches (expressed as % of " \ 1485 "CompileThreshold) before using the method's profile") \ 1486 range(0, 100) \ 1487 \ 1488 diagnostic(bool, PrintMethodData, false, \ 1489 "Print the results of +ProfileInterpreter at end of run") \ 1490 \ 1491 develop(bool, VerifyDataPointer, trueInDebug, \ 1492 "Verify the method data pointer during interpreter profiling") \ 1493 \ 1494 develop(bool, VerifyCompiledCode, false, \ 1495 "Include miscellaneous runtime verifications in nmethod code; " \ 1496 "default off because it disturbs nmethod size heuristics") \ 1497 \ 1498 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 1499 "Manually make GC thread crash then dump java stack trace; " \ 1500 "Test only") \ 1501 \ 1502 /* compilation */ \ 1503 product(bool, UseCompiler, true, \ 1504 "Use Just-In-Time compilation") \ 1505 \ 1506 develop(bool, TraceCompilationPolicy, false, \ 1507 "Trace compilation policy") \ 1508 \ 1509 develop(bool, TimeCompilationPolicy, false, \ 1510 "Time the compilation policy") \ 1511 \ 1512 product(bool, UseCounterDecay, true, \ 1513 "Adjust recompilation counters") \ 1514 \ 1515 develop(intx, CounterHalfLifeTime, 30, \ 1516 "Half-life time of invocation counters (in seconds)") \ 1517 \ 1518 develop(intx, CounterDecayMinIntervalLength, 500, \ 1519 "The minimum interval (in milliseconds) between invocation of " \ 1520 "CounterDecay") \ 1521 \ 1522 product(bool, AlwaysCompileLoopMethods, false, \ 1523 "When using recompilation, never interpret methods " \ 1524 "containing loops") \ 1525 \ 1526 product(bool, DontCompileHugeMethods, true, \ 1527 "Do not compile methods > HugeMethodLimit") \ 1528 \ 1529 /* Bytecode escape analysis estimation. */ \ 1530 product(bool, EstimateArgEscape, true, \ 1531 "Analyze bytecodes to estimate escape state of arguments") \ 1532 \ 1533 product(intx, BCEATraceLevel, 0, \ 1534 "How much tracing to do of bytecode escape analysis estimates " \ 1535 "(0-3)") \ 1536 range(0, 3) \ 1537 \ 1538 product(intx, MaxBCEAEstimateLevel, 5, \ 1539 "Maximum number of nested calls that are analyzed by BC EA") \ 1540 range(0, max_jint) \ 1541 \ 1542 product(intx, MaxBCEAEstimateSize, 150, \ 1543 "Maximum bytecode size of a method to be analyzed by BC EA") \ 1544 range(0, max_jint) \ 1545 \ 1546 product(intx, AllocatePrefetchStyle, 1, \ 1547 "0 = no prefetch, " \ 1548 "1 = generate prefetch instructions for each allocation, " \ 1549 "2 = use TLAB watermark to gate allocation prefetch, " \ 1550 "3 = generate one prefetch instruction per cache line") \ 1551 range(0, 3) \ 1552 \ 1553 product(intx, AllocatePrefetchDistance, -1, \ 1554 "Distance to prefetch ahead of allocation pointer. " \ 1555 "-1: use system-specific value (automatically determined") \ 1556 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 1557 \ 1558 product(intx, AllocatePrefetchLines, 3, \ 1559 "Number of lines to prefetch ahead of array allocation pointer") \ 1560 range(1, 64) \ 1561 \ 1562 product(intx, AllocateInstancePrefetchLines, 1, \ 1563 "Number of lines to prefetch ahead of instance allocation " \ 1564 "pointer") \ 1565 range(1, 64) \ 1566 \ 1567 product(intx, AllocatePrefetchStepSize, 16, \ 1568 "Step size in bytes of sequential prefetch instructions") \ 1569 range(1, 512) \ 1570 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 1571 \ 1572 product(intx, AllocatePrefetchInstr, 0, \ 1573 "Select instruction to prefetch ahead of allocation pointer") \ 1574 constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit) \ 1575 \ 1576 /* deoptimization */ \ 1577 develop(bool, TraceDeoptimization, false, \ 1578 "Trace deoptimization") \ 1579 \ 1580 develop(bool, PrintDeoptimizationDetails, false, \ 1581 "Print more information about deoptimization") \ 1582 \ 1583 develop(bool, DebugDeoptimization, false, \ 1584 "Tracing various information while debugging deoptimization") \ 1585 \ 1586 product(intx, SelfDestructTimer, 0, \ 1587 "Will cause VM to terminate after a given time (in minutes) " \ 1588 "(0 means off)") \ 1589 range(0, max_intx) \ 1590 \ 1591 product(intx, MaxJavaStackTraceDepth, 1024, \ 1592 "The maximum number of lines in the stack trace for Java " \ 1593 "exceptions (0 means all)") \ 1594 range(0, max_jint/2) \ 1595 \ 1596 /* notice: the max range value here is max_jint, not max_intx */ \ 1597 /* because of overflow issue */ \ 1598 diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 1599 "Guarantee a safepoint (at least) every so many milliseconds " \ 1600 "(0 means none)") \ 1601 range(0, max_jint) \ 1602 \ 1603 product(intx, SafepointTimeoutDelay, 10000, \ 1604 "Delay in milliseconds for option SafepointTimeout") \ 1605 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 1606 NOT_LP64(range(0, max_intx)) \ 1607 \ 1608 product(intx, NmethodSweepActivity, 10, \ 1609 "Removes cold nmethods from code cache if > 0. Higher values " \ 1610 "result in more aggressive sweeping") \ 1611 range(0, 2000) \ 1612 \ 1613 notproduct(bool, LogSweeper, false, \ 1614 "Keep a ring buffer of sweeper activity") \ 1615 \ 1616 notproduct(intx, SweeperLogEntries, 1024, \ 1617 "Number of records in the ring buffer of sweeper activity") \ 1618 \ 1619 notproduct(intx, MemProfilingInterval, 500, \ 1620 "Time between each invocation of the MemProfiler") \ 1621 \ 1622 develop(intx, MallocCatchPtr, -1, \ 1623 "Hit breakpoint when mallocing/freeing this pointer") \ 1624 \ 1625 notproduct(ccstrlist, SuppressErrorAt, "", \ 1626 "List of assertions (file:line) to muzzle") \ 1627 \ 1628 develop(intx, StackPrintLimit, 100, \ 1629 "number of stack frames to print in VM-level stack dump") \ 1630 \ 1631 notproduct(intx, MaxElementPrintSize, 256, \ 1632 "maximum number of elements to print") \ 1633 \ 1634 notproduct(intx, MaxSubklassPrintSize, 4, \ 1635 "maximum number of subklasses to print when printing klass") \ 1636 \ 1637 product(intx, MaxInlineLevel, 9, \ 1638 "maximum number of nested calls that are inlined") \ 1639 range(0, max_jint) \ 1640 \ 1641 product(intx, MaxRecursiveInlineLevel, 1, \ 1642 "maximum number of nested recursive calls that are inlined") \ 1643 range(0, max_jint) \ 1644 \ 1645 develop(intx, MaxForceInlineLevel, 100, \ 1646 "maximum number of nested calls that are forced for inlining " \ 1647 "(using CompileCommand or marked w/ @ForceInline)") \ 1648 range(0, max_jint) \ 1649 \ 1650 product_pd(intx, InlineSmallCode, \ 1651 "Only inline already compiled methods if their code size is " \ 1652 "less than this") \ 1653 range(0, max_jint) \ 1654 \ 1655 product(intx, MaxInlineSize, 35, \ 1656 "The maximum bytecode size of a method to be inlined") \ 1657 range(0, max_jint) \ 1658 \ 1659 product_pd(intx, FreqInlineSize, \ 1660 "The maximum bytecode size of a frequent method to be inlined") \ 1661 range(0, max_jint) \ 1662 \ 1663 product(intx, MaxTrivialSize, 6, \ 1664 "The maximum bytecode size of a trivial method to be inlined") \ 1665 range(0, max_jint) \ 1666 \ 1667 product(intx, MinInliningThreshold, 250, \ 1668 "The minimum invocation count a method needs to have to be " \ 1669 "inlined") \ 1670 range(0, max_jint) \ 1671 \ 1672 develop(intx, MethodHistogramCutoff, 100, \ 1673 "The cutoff value for method invocation histogram (+CountCalls)") \ 1674 \ 1675 diagnostic(intx, ProfilerNumberOfInterpretedMethods, 25, \ 1676 "Number of interpreted methods to show in profile") \ 1677 \ 1678 diagnostic(intx, ProfilerNumberOfCompiledMethods, 25, \ 1679 "Number of compiled methods to show in profile") \ 1680 \ 1681 diagnostic(intx, ProfilerNumberOfStubMethods, 25, \ 1682 "Number of stub methods to show in profile") \ 1683 \ 1684 diagnostic(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 1685 "Number of runtime stub nodes to show in profile") \ 1686 \ 1687 product(intx, ProfileIntervalsTicks, 100, \ 1688 "Number of ticks between printing of interval profile " \ 1689 "(+ProfileIntervals)") \ 1690 range(0, max_intx) \ 1691 \ 1692 develop(intx, DontYieldALotInterval, 10, \ 1693 "Interval between which yields will be dropped (milliseconds)") \ 1694 \ 1695 develop(intx, ProfilerPCTickThreshold, 15, \ 1696 "Number of ticks in a PC buckets to be a hotspot") \ 1697 \ 1698 notproduct(intx, DeoptimizeALotInterval, 5, \ 1699 "Number of exits until DeoptimizeALot kicks in") \ 1700 \ 1701 notproduct(intx, ZombieALotInterval, 5, \ 1702 "Number of exits until ZombieALot kicks in") \ 1703 \ 1704 diagnostic(uintx, MallocMaxTestWords, 0, \ 1705 "If non-zero, maximum number of words that malloc/realloc can " \ 1706 "allocate (for testing only)") \ 1707 range(0, max_uintx) \ 1708 \ 1709 product(intx, TypeProfileWidth, 2, \ 1710 "Number of receiver types to record in call/cast profile") \ 1711 range(0, 8) \ 1712 \ 1713 develop(intx, BciProfileWidth, 2, \ 1714 "Number of return bci's to record in ret profile") \ 1715 \ 1716 product(intx, PerMethodRecompilationCutoff, 400, \ 1717 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 1718 range(-1, max_intx) \ 1719 \ 1720 product(intx, PerBytecodeRecompilationCutoff, 200, \ 1721 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 1722 range(-1, max_intx) \ 1723 \ 1724 product(intx, PerMethodTrapLimit, 100, \ 1725 "Limit on traps (of one kind) in a method (includes inlines)") \ 1726 range(0, max_jint) \ 1727 \ 1728 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 1729 "Limit on speculative traps (of one kind) in a method " \ 1730 "(includes inlines)") \ 1731 range(0, max_jint) \ 1732 \ 1733 product(intx, PerBytecodeTrapLimit, 4, \ 1734 "Limit on traps (of one kind) at a particular BCI") \ 1735 range(0, max_jint) \ 1736 \ 1737 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 1738 "Extra method data trap entries for speculation") \ 1739 \ 1740 develop(intx, InlineFrequencyRatio, 20, \ 1741 "Ratio of call site execution to caller method invocation") \ 1742 range(0, max_jint) \ 1743 \ 1744 diagnostic_pd(intx, InlineFrequencyCount, \ 1745 "Count of call site execution necessary to trigger frequent " \ 1746 "inlining") \ 1747 range(0, max_jint) \ 1748 \ 1749 develop(intx, InlineThrowCount, 50, \ 1750 "Force inlining of interpreted methods that throw this often") \ 1751 range(0, max_jint) \ 1752 \ 1753 develop(intx, InlineThrowMaxSize, 200, \ 1754 "Force inlining of throwing methods smaller than this") \ 1755 range(0, max_jint) \ 1756 \ 1757 develop(intx, ProfilerNodeSize, 1024, \ 1758 "Size in K to allocate for the Profile Nodes of each thread") \ 1759 range(0, 1024) \ 1760 \ 1761 product_pd(size_t, MetaspaceSize, \ 1762 "Initial threshold (in bytes) at which a garbage collection " \ 1763 "is done to reduce Metaspace usage") \ 1764 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 1765 \ 1766 product(size_t, MaxMetaspaceSize, max_uintx, \ 1767 "Maximum size of Metaspaces (in bytes)") \ 1768 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 1769 \ 1770 product(size_t, CompressedClassSpaceSize, 1*G, \ 1771 "Maximum size of class area in Metaspace when compressed " \ 1772 "class pointers are used") \ 1773 range(1*M, 3*G) \ 1774 \ 1775 manageable(uintx, MinHeapFreeRatio, 40, \ 1776 "The minimum percentage of heap free after GC to avoid expansion."\ 1777 " For most GCs this applies to the old generation. In G1 and" \ 1778 " ParallelGC it applies to the whole heap.") \ 1779 range(0, 100) \ 1780 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 1781 \ 1782 manageable(uintx, MaxHeapFreeRatio, 70, \ 1783 "The maximum percentage of heap free after GC to avoid shrinking."\ 1784 " For most GCs this applies to the old generation. In G1 and" \ 1785 " ParallelGC it applies to the whole heap.") \ 1786 range(0, 100) \ 1787 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 1788 \ 1789 product(bool, ShrinkHeapInSteps, true, \ 1790 "When disabled, informs the GC to shrink the java heap directly" \ 1791 " to the target size at the next full GC rather than requiring" \ 1792 " smaller steps during multiple full GCs.") \ 1793 \ 1794 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 1795 "Number of milliseconds per MB of free space in the heap") \ 1796 range(0, max_intx) \ 1797 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 1798 \ 1799 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 1800 "The minimum change in heap space due to GC (in bytes)") \ 1801 range(0, max_uintx) \ 1802 \ 1803 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 1804 "The minimum expansion of Metaspace (in bytes)") \ 1805 range(0, max_uintx) \ 1806 \ 1807 product(uintx, MaxMetaspaceFreeRatio, 70, \ 1808 "The maximum percentage of Metaspace free after GC to avoid " \ 1809 "shrinking") \ 1810 range(0, 100) \ 1811 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 1812 \ 1813 product(uintx, MinMetaspaceFreeRatio, 40, \ 1814 "The minimum percentage of Metaspace free after GC to avoid " \ 1815 "expansion") \ 1816 range(0, 99) \ 1817 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 1818 \ 1819 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 1820 "The maximum expansion of Metaspace without full GC (in bytes)") \ 1821 range(0, max_uintx) \ 1822 \ 1823 /* stack parameters */ \ 1824 product_pd(intx, StackYellowPages, \ 1825 "Number of yellow zone (recoverable overflows) pages of size " \ 1826 "4KB. If pages are bigger yellow zone is aligned up.") \ 1827 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 1828 \ 1829 product_pd(intx, StackRedPages, \ 1830 "Number of red zone (unrecoverable overflows) pages of size " \ 1831 "4KB. If pages are bigger red zone is aligned up.") \ 1832 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 1833 \ 1834 product_pd(intx, StackReservedPages, \ 1835 "Number of reserved zone (reserved to annotated methods) pages" \ 1836 " of size 4KB. If pages are bigger reserved zone is aligned up.") \ 1837 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ 1838 \ 1839 product(bool, RestrictReservedStack, true, \ 1840 "Restrict @ReservedStackAccess to trusted classes") \ 1841 \ 1842 /* greater stack shadow pages can't generate instruction to bang stack */ \ 1843 product_pd(intx, StackShadowPages, \ 1844 "Number of shadow zone (for overflow checking) pages of size " \ 1845 "4KB. If pages are bigger shadow zone is aligned up. " \ 1846 "This should exceed the depth of the VM and native call stack.") \ 1847 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 1848 \ 1849 product_pd(intx, ThreadStackSize, \ 1850 "Thread Stack Size (in Kbytes)") \ 1851 range(0, 1 * M) \ 1852 \ 1853 product_pd(intx, VMThreadStackSize, \ 1854 "Non-Java Thread Stack Size (in Kbytes)") \ 1855 range(0, max_intx/(1 * K)) \ 1856 \ 1857 product_pd(intx, CompilerThreadStackSize, \ 1858 "Compiler Thread Stack Size (in Kbytes)") \ 1859 range(0, max_intx/(1 * K)) \ 1860 \ 1861 develop_pd(size_t, JVMInvokeMethodSlack, \ 1862 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 1863 \ 1864 /* code cache parameters */ \ 1865 develop_pd(uintx, CodeCacheSegmentSize, \ 1866 "Code cache segment size (in bytes) - smallest unit of " \ 1867 "allocation") \ 1868 range(1, 1024) \ 1869 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 1870 \ 1871 develop_pd(intx, CodeEntryAlignment, \ 1872 "Code entry alignment for generated code (in bytes)") \ 1873 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 1874 \ 1875 product_pd(intx, OptoLoopAlignment, \ 1876 "Align inner loops to zero relative to this modulus") \ 1877 range(1, 16) \ 1878 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 1879 \ 1880 product_pd(uintx, InitialCodeCacheSize, \ 1881 "Initial code cache size (in bytes)") \ 1882 range(os::vm_page_size(), max_uintx) \ 1883 \ 1884 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 1885 "Minimum code cache size (in bytes) required to start VM.") \ 1886 range(0, max_uintx) \ 1887 \ 1888 product(bool, SegmentedCodeCache, false, \ 1889 "Use a segmented code cache") \ 1890 \ 1891 product_pd(uintx, ReservedCodeCacheSize, \ 1892 "Reserved code cache size (in bytes) - maximum code cache size") \ 1893 range(os::vm_page_size(), max_uintx) \ 1894 \ 1895 product_pd(uintx, NonProfiledCodeHeapSize, \ 1896 "Size of code heap with non-profiled methods (in bytes)") \ 1897 range(0, max_uintx) \ 1898 \ 1899 product_pd(uintx, ProfiledCodeHeapSize, \ 1900 "Size of code heap with profiled methods (in bytes)") \ 1901 range(0, max_uintx) \ 1902 \ 1903 product_pd(uintx, NonNMethodCodeHeapSize, \ 1904 "Size of code heap with non-nmethods (in bytes)") \ 1905 range(os::vm_page_size(), max_uintx) \ 1906 \ 1907 product_pd(uintx, CodeCacheExpansionSize, \ 1908 "Code cache expansion size (in bytes)") \ 1909 range(32*K, max_uintx) \ 1910 \ 1911 diagnostic_pd(uintx, CodeCacheMinBlockLength, \ 1912 "Minimum number of segments in a code cache block") \ 1913 range(1, 100) \ 1914 \ 1915 notproduct(bool, ExitOnFullCodeCache, false, \ 1916 "Exit the VM if we fill the code cache") \ 1917 \ 1918 product(bool, UseCodeCacheFlushing, true, \ 1919 "Remove cold/old nmethods from the code cache") \ 1920 \ 1921 product(uintx, StartAggressiveSweepingAt, 10, \ 1922 "Start aggressive sweeping if X[%] of the code cache is free." \ 1923 "Segmented code cache: X[%] of the non-profiled heap." \ 1924 "Non-segmented code cache: X[%] of the total code cache") \ 1925 range(0, 100) \ 1926 \ 1927 /* AOT parameters */ \ 1928 product(bool, UseAOT, AOT_ONLY(true) NOT_AOT(false), \ 1929 "Use AOT compiled files") \ 1930 \ 1931 product(ccstrlist, AOTLibrary, NULL, \ 1932 "AOT library") \ 1933 \ 1934 product(bool, PrintAOT, false, \ 1935 "Print used AOT klasses and methods") \ 1936 \ 1937 notproduct(bool, PrintAOTStatistics, false, \ 1938 "Print AOT statistics") \ 1939 \ 1940 diagnostic(bool, UseAOTStrictLoading, false, \ 1941 "Exit the VM if any of the AOT libraries has invalid config") \ 1942 \ 1943 product(bool, CalculateClassFingerprint, false, \ 1944 "Calculate class fingerprint") \ 1945 \ 1946 /* interpreter debugging */ \ 1947 develop(intx, BinarySwitchThreshold, 5, \ 1948 "Minimal number of lookupswitch entries for rewriting to binary " \ 1949 "switch") \ 1950 \ 1951 develop(intx, StopInterpreterAt, 0, \ 1952 "Stop interpreter execution at specified bytecode number") \ 1953 \ 1954 develop(intx, TraceBytecodesAt, 0, \ 1955 "Trace bytecodes starting with specified bytecode number") \ 1956 \ 1957 /* compiler interface */ \ 1958 develop(intx, CIStart, 0, \ 1959 "The id of the first compilation to permit") \ 1960 \ 1961 develop(intx, CIStop, max_jint, \ 1962 "The id of the last compilation to permit") \ 1963 \ 1964 develop(intx, CIStartOSR, 0, \ 1965 "The id of the first osr compilation to permit " \ 1966 "(CICountOSR must be on)") \ 1967 \ 1968 develop(intx, CIStopOSR, max_jint, \ 1969 "The id of the last osr compilation to permit " \ 1970 "(CICountOSR must be on)") \ 1971 \ 1972 develop(intx, CIBreakAtOSR, -1, \ 1973 "The id of osr compilation to break at") \ 1974 \ 1975 develop(intx, CIBreakAt, -1, \ 1976 "The id of compilation to break at") \ 1977 \ 1978 product(ccstrlist, CompileOnly, "", \ 1979 "List of methods (pkg/class.name) to restrict compilation to") \ 1980 \ 1981 product(ccstr, CompileCommandFile, NULL, \ 1982 "Read compiler commands from this file [.hotspot_compiler]") \ 1983 \ 1984 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 1985 "Read compiler directives from this file") \ 1986 \ 1987 product(ccstrlist, CompileCommand, "", \ 1988 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 1989 \ 1990 develop(bool, ReplayCompiles, false, \ 1991 "Enable replay of compilations from ReplayDataFile") \ 1992 \ 1993 product(ccstr, ReplayDataFile, NULL, \ 1994 "File containing compilation replay information" \ 1995 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 1996 \ 1997 product(ccstr, InlineDataFile, NULL, \ 1998 "File containing inlining replay information" \ 1999 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 2000 \ 2001 develop(intx, ReplaySuppressInitializers, 2, \ 2002 "Control handling of class initialization during replay: " \ 2003 "0 - don't do anything special; " \ 2004 "1 - treat all class initializers as empty; " \ 2005 "2 - treat class initializers for application classes as empty; " \ 2006 "3 - allow all class initializers to run during bootstrap but " \ 2007 " pretend they are empty after starting replay") \ 2008 range(0, 3) \ 2009 \ 2010 develop(bool, ReplayIgnoreInitErrors, false, \ 2011 "Ignore exceptions thrown during initialization for replay") \ 2012 \ 2013 product(bool, DumpReplayDataOnError, true, \ 2014 "Record replay data for crashing compiler threads") \ 2015 \ 2016 product(bool, CICompilerCountPerCPU, false, \ 2017 "1 compiler thread for log(N CPUs)") \ 2018 \ 2019 develop(intx, CIFireOOMAt, -1, \ 2020 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 2021 "(non-negative value throws OOM after this many CI accesses " \ 2022 "in each compile)") \ 2023 notproduct(intx, CICrashAt, -1, \ 2024 "id of compilation to trigger assert in compiler thread for " \ 2025 "the purpose of testing, e.g. generation of replay data") \ 2026 notproduct(bool, CIObjectFactoryVerify, false, \ 2027 "enable potentially expensive verification in ciObjectFactory") \ 2028 \ 2029 /* Priorities */ \ 2030 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 2031 \ 2032 product(intx, ThreadPriorityPolicy, 0, \ 2033 "0 : Normal. "\ 2034 " VM chooses priorities that are appropriate for normal "\ 2035 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 2036 " to normal native priority. Java priorities below " \ 2037 " NORM_PRIORITY map to lower native priority values. On "\ 2038 " Windows applications are allowed to use higher native "\ 2039 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 2040 " not use the highest possible native priority, "\ 2041 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 2042 " system threads. On Linux thread priorities are ignored "\ 2043 " because the OS does not support static priority in "\ 2044 " SCHED_OTHER scheduling class which is the only choice for "\ 2045 " non-root, non-realtime applications. "\ 2046 "1 : Aggressive. "\ 2047 " Java thread priorities map over to the entire range of "\ 2048 " native thread priorities. Higher Java thread priorities map "\ 2049 " to higher native thread priorities. This policy should be "\ 2050 " used with care, as sometimes it can cause performance "\ 2051 " degradation in the application and/or the entire system. On "\ 2052 " Linux this policy requires root privilege.") \ 2053 range(0, 1) \ 2054 \ 2055 product(bool, ThreadPriorityVerbose, false, \ 2056 "Print priority changes") \ 2057 \ 2058 product(intx, CompilerThreadPriority, -1, \ 2059 "The native priority at which compiler threads should run " \ 2060 "(-1 means no change)") \ 2061 range(min_jint, max_jint) \ 2062 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 2063 \ 2064 product(intx, VMThreadPriority, -1, \ 2065 "The native priority at which the VM thread should run " \ 2066 "(-1 means no change)") \ 2067 range(-1, 127) \ 2068 \ 2069 product(intx, JavaPriority1_To_OSPriority, -1, \ 2070 "Map Java priorities to OS priorities") \ 2071 range(-1, 127) \ 2072 \ 2073 product(intx, JavaPriority2_To_OSPriority, -1, \ 2074 "Map Java priorities to OS priorities") \ 2075 range(-1, 127) \ 2076 \ 2077 product(intx, JavaPriority3_To_OSPriority, -1, \ 2078 "Map Java priorities to OS priorities") \ 2079 range(-1, 127) \ 2080 \ 2081 product(intx, JavaPriority4_To_OSPriority, -1, \ 2082 "Map Java priorities to OS priorities") \ 2083 range(-1, 127) \ 2084 \ 2085 product(intx, JavaPriority5_To_OSPriority, -1, \ 2086 "Map Java priorities to OS priorities") \ 2087 range(-1, 127) \ 2088 \ 2089 product(intx, JavaPriority6_To_OSPriority, -1, \ 2090 "Map Java priorities to OS priorities") \ 2091 range(-1, 127) \ 2092 \ 2093 product(intx, JavaPriority7_To_OSPriority, -1, \ 2094 "Map Java priorities to OS priorities") \ 2095 range(-1, 127) \ 2096 \ 2097 product(intx, JavaPriority8_To_OSPriority, -1, \ 2098 "Map Java priorities to OS priorities") \ 2099 range(-1, 127) \ 2100 \ 2101 product(intx, JavaPriority9_To_OSPriority, -1, \ 2102 "Map Java priorities to OS priorities") \ 2103 range(-1, 127) \ 2104 \ 2105 product(intx, JavaPriority10_To_OSPriority,-1, \ 2106 "Map Java priorities to OS priorities") \ 2107 range(-1, 127) \ 2108 \ 2109 experimental(bool, UseCriticalJavaThreadPriority, false, \ 2110 "Java thread priority 10 maps to critical scheduling priority") \ 2111 \ 2112 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 2113 "Compiler thread(s) run at critical scheduling priority") \ 2114 \ 2115 experimental(bool, UseCriticalCMSThreadPriority, false, \ 2116 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 2117 \ 2118 /* compiler debugging */ \ 2119 notproduct(intx, CompileTheWorldStartAt, 1, \ 2120 "First class to consider when using +CompileTheWorld") \ 2121 \ 2122 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 2123 "Last class to consider when using +CompileTheWorld") \ 2124 \ 2125 develop(intx, NewCodeParameter, 0, \ 2126 "Testing Only: Create a dedicated integer parameter before " \ 2127 "putback") \ 2128 \ 2129 /* new oopmap storage allocation */ \ 2130 develop(intx, MinOopMapAllocation, 8, \ 2131 "Minimum number of OopMap entries in an OopMapSet") \ 2132 \ 2133 /* Background Compilation */ \ 2134 develop(intx, LongCompileThreshold, 50, \ 2135 "Used with +TraceLongCompiles") \ 2136 \ 2137 /* recompilation */ \ 2138 product_pd(intx, CompileThreshold, \ 2139 "number of interpreted method invocations before (re-)compiling") \ 2140 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 2141 \ 2142 product(double, CompileThresholdScaling, 1.0, \ 2143 "Factor to control when first compilation happens " \ 2144 "(both with and without tiered compilation): " \ 2145 "values greater than 1.0 delay counter overflow, " \ 2146 "values between 0 and 1.0 rush counter overflow, " \ 2147 "value of 1.0 leaves compilation thresholds unchanged " \ 2148 "value of 0.0 is equivalent to -Xint. " \ 2149 "" \ 2150 "Flag can be set as per-method option. " \ 2151 "If a value is specified for a method, compilation thresholds " \ 2152 "for that method are scaled by both the value of the global flag "\ 2153 "and the value of the per-method flag.") \ 2154 range(0.0, DBL_MAX) \ 2155 \ 2156 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 2157 "Interpreter (tier 0) invocation notification frequency") \ 2158 range(0, 30) \ 2159 \ 2160 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 2161 "C1 without MDO (tier 2) invocation notification frequency") \ 2162 range(0, 30) \ 2163 \ 2164 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 2165 "C1 with MDO profiling (tier 3) invocation notification " \ 2166 "frequency") \ 2167 range(0, 30) \ 2168 \ 2169 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 2170 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 2171 range(0, 30) \ 2172 \ 2173 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 2174 "Interpreter (tier 0) invocation notification frequency") \ 2175 range(0, 30) \ 2176 \ 2177 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 2178 "C1 without MDO (tier 2) invocation notification frequency") \ 2179 range(0, 30) \ 2180 \ 2181 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 2182 "C1 with MDO profiling (tier 3) invocation notification " \ 2183 "frequency") \ 2184 range(0, 30) \ 2185 \ 2186 product(intx, Tier2CompileThreshold, 0, \ 2187 "threshold at which tier 2 compilation is invoked") \ 2188 range(0, max_jint) \ 2189 \ 2190 product(intx, Tier2BackEdgeThreshold, 0, \ 2191 "Back edge threshold at which tier 2 compilation is invoked") \ 2192 range(0, max_jint) \ 2193 \ 2194 product(intx, Tier3InvocationThreshold, 200, \ 2195 "Compile if number of method invocations crosses this " \ 2196 "threshold") \ 2197 range(0, max_jint) \ 2198 \ 2199 product(intx, Tier3MinInvocationThreshold, 100, \ 2200 "Minimum invocation to compile at tier 3") \ 2201 range(0, max_jint) \ 2202 \ 2203 product(intx, Tier3CompileThreshold, 2000, \ 2204 "Threshold at which tier 3 compilation is invoked (invocation " \ 2205 "minimum must be satisfied)") \ 2206 range(0, max_jint) \ 2207 \ 2208 product(intx, Tier3BackEdgeThreshold, 60000, \ 2209 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 2210 range(0, max_jint) \ 2211 \ 2212 product(intx, Tier3AOTInvocationThreshold, 10000, \ 2213 "Compile if number of method invocations crosses this " \ 2214 "threshold if coming from AOT") \ 2215 range(0, max_jint) \ 2216 \ 2217 product(intx, Tier3AOTMinInvocationThreshold, 1000, \ 2218 "Minimum invocation to compile at tier 3 if coming from AOT") \ 2219 range(0, max_jint) \ 2220 \ 2221 product(intx, Tier3AOTCompileThreshold, 15000, \ 2222 "Threshold at which tier 3 compilation is invoked (invocation " \ 2223 "minimum must be satisfied) if coming from AOT") \ 2224 range(0, max_jint) \ 2225 \ 2226 product(intx, Tier3AOTBackEdgeThreshold, 120000, \ 2227 "Back edge threshold at which tier 3 OSR compilation is invoked " \ 2228 "if coming from AOT") \ 2229 range(0, max_jint) \ 2230 \ 2231 product(intx, Tier4InvocationThreshold, 5000, \ 2232 "Compile if number of method invocations crosses this " \ 2233 "threshold") \ 2234 range(0, max_jint) \ 2235 \ 2236 product(intx, Tier4MinInvocationThreshold, 600, \ 2237 "Minimum invocation to compile at tier 4") \ 2238 range(0, max_jint) \ 2239 \ 2240 product(intx, Tier4CompileThreshold, 15000, \ 2241 "Threshold at which tier 4 compilation is invoked (invocation " \ 2242 "minimum must be satisfied") \ 2243 range(0, max_jint) \ 2244 \ 2245 product(intx, Tier4BackEdgeThreshold, 40000, \ 2246 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 2247 range(0, max_jint) \ 2248 \ 2249 product(intx, Tier3DelayOn, 5, \ 2250 "If C2 queue size grows over this amount per compiler thread " \ 2251 "stop compiling at tier 3 and start compiling at tier 2") \ 2252 range(0, max_jint) \ 2253 \ 2254 product(intx, Tier3DelayOff, 2, \ 2255 "If C2 queue size is less than this amount per compiler thread " \ 2256 "allow methods compiled at tier 2 transition to tier 3") \ 2257 range(0, max_jint) \ 2258 \ 2259 product(intx, Tier3LoadFeedback, 5, \ 2260 "Tier 3 thresholds will increase twofold when C1 queue size " \ 2261 "reaches this amount per compiler thread") \ 2262 range(0, max_jint) \ 2263 \ 2264 product(intx, Tier4LoadFeedback, 3, \ 2265 "Tier 4 thresholds will increase twofold when C2 queue size " \ 2266 "reaches this amount per compiler thread") \ 2267 range(0, max_jint) \ 2268 \ 2269 product(intx, TieredCompileTaskTimeout, 50, \ 2270 "Kill compile task if method was not used within " \ 2271 "given timeout in milliseconds") \ 2272 range(0, max_intx) \ 2273 \ 2274 product(intx, TieredStopAtLevel, 4, \ 2275 "Stop at given compilation level") \ 2276 range(0, 4) \ 2277 \ 2278 product(intx, Tier0ProfilingStartPercentage, 200, \ 2279 "Start profiling in interpreter if the counters exceed tier 3 " \ 2280 "thresholds by the specified percentage") \ 2281 range(0, max_jint) \ 2282 \ 2283 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 2284 "Increase the compile threshold for C1 compilation if the code " \ 2285 "cache is filled by the specified percentage") \ 2286 range(0, 99) \ 2287 \ 2288 product(intx, TieredRateUpdateMinTime, 1, \ 2289 "Minimum rate sampling interval (in milliseconds)") \ 2290 range(0, max_intx) \ 2291 \ 2292 product(intx, TieredRateUpdateMaxTime, 25, \ 2293 "Maximum rate sampling interval (in milliseconds)") \ 2294 range(0, max_intx) \ 2295 \ 2296 product_pd(bool, TieredCompilation, \ 2297 "Enable tiered compilation") \ 2298 \ 2299 product(bool, PrintTieredEvents, false, \ 2300 "Print tiered events notifications") \ 2301 \ 2302 product_pd(intx, OnStackReplacePercentage, \ 2303 "NON_TIERED number of method invocations/branches (expressed as " \ 2304 "% of CompileThreshold) before (re-)compiling OSR code") \ 2305 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 2306 \ 2307 product(intx, InterpreterProfilePercentage, 33, \ 2308 "NON_TIERED number of method invocations/branches (expressed as " \ 2309 "% of CompileThreshold) before profiling in the interpreter") \ 2310 range(0, 100) \ 2311 \ 2312 develop(intx, MaxRecompilationSearchLength, 10, \ 2313 "The maximum number of frames to inspect when searching for " \ 2314 "recompilee") \ 2315 \ 2316 develop(intx, MaxInterpretedSearchLength, 3, \ 2317 "The maximum number of interpreted frames to skip when searching "\ 2318 "for recompilee") \ 2319 \ 2320 develop(intx, DesiredMethodLimit, 8000, \ 2321 "The desired maximum method size (in bytecodes) after inlining") \ 2322 \ 2323 develop(intx, HugeMethodLimit, 8000, \ 2324 "Don't compile methods larger than this if " \ 2325 "+DontCompileHugeMethods") \ 2326 \ 2327 /* New JDK 1.4 reflection implementation */ \ 2328 \ 2329 develop(intx, FastSuperclassLimit, 8, \ 2330 "Depth of hardwired instanceof accelerator array") \ 2331 \ 2332 /* Properties for Java libraries */ \ 2333 \ 2334 product(uint64_t, MaxDirectMemorySize, 0, \ 2335 "Maximum total size of NIO direct-buffer allocations") \ 2336 range(0, max_jlong) \ 2337 \ 2338 /* Flags used for temporary code during development */ \ 2339 \ 2340 diagnostic(bool, UseNewCode, false, \ 2341 "Testing Only: Use the new version while testing") \ 2342 \ 2343 diagnostic(bool, UseNewCode2, false, \ 2344 "Testing Only: Use the new version while testing") \ 2345 \ 2346 diagnostic(bool, UseNewCode3, false, \ 2347 "Testing Only: Use the new version while testing") \ 2348 \ 2349 /* flags for performance data collection */ \ 2350 \ 2351 product(bool, UsePerfData, true, \ 2352 "Flag to disable jvmstat instrumentation for performance testing "\ 2353 "and problem isolation purposes") \ 2354 \ 2355 product(bool, PerfDataSaveToFile, false, \ 2356 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 2357 \ 2358 product(ccstr, PerfDataSaveFile, NULL, \ 2359 "Save PerfData memory to the specified absolute pathname. " \ 2360 "The string %p in the file name (if present) " \ 2361 "will be replaced by pid") \ 2362 \ 2363 product(intx, PerfDataSamplingInterval, 50, \ 2364 "Data sampling interval (in milliseconds)") \ 2365 range(PeriodicTask::min_interval, max_jint) \ 2366 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 2367 \ 2368 product(bool, PerfDisableSharedMem, false, \ 2369 "Store performance data in standard memory") \ 2370 \ 2371 product(intx, PerfDataMemorySize, 32*K, \ 2372 "Size of performance data memory region. Will be rounded " \ 2373 "up to a multiple of the native os page size.") \ 2374 range(128, 32*64*K) \ 2375 \ 2376 product(intx, PerfMaxStringConstLength, 1024, \ 2377 "Maximum PerfStringConstant string length before truncation") \ 2378 range(32, 32*K) \ 2379 \ 2380 product(bool, PerfAllowAtExitRegistration, false, \ 2381 "Allow registration of atexit() methods") \ 2382 \ 2383 product(bool, PerfBypassFileSystemCheck, false, \ 2384 "Bypass Win32 file system criteria checks (Windows Only)") \ 2385 \ 2386 product(intx, UnguardOnExecutionViolation, 0, \ 2387 "Unguard page and retry on no-execute fault (Win32 only) " \ 2388 "0=off, 1=conservative, 2=aggressive") \ 2389 range(0, 2) \ 2390 \ 2391 /* Serviceability Support */ \ 2392 \ 2393 product(bool, ManagementServer, false, \ 2394 "Create JMX Management Server") \ 2395 \ 2396 product(bool, DisableAttachMechanism, false, \ 2397 "Disable mechanism that allows tools to attach to this VM") \ 2398 \ 2399 product(bool, StartAttachListener, false, \ 2400 "Always start Attach Listener at VM startup") \ 2401 \ 2402 product(bool, EnableDynamicAgentLoading, true, \ 2403 "Allow tools to load agents with the attach mechanism") \ 2404 \ 2405 manageable(bool, PrintConcurrentLocks, false, \ 2406 "Print java.util.concurrent locks in thread dump") \ 2407 \ 2408 /* Shared spaces */ \ 2409 \ 2410 product(bool, UseSharedSpaces, true, \ 2411 "Use shared spaces for metadata") \ 2412 \ 2413 product(bool, VerifySharedSpaces, false, \ 2414 "Verify shared spaces (false for default archive, true for " \ 2415 "archive specified by -XX:SharedArchiveFile)") \ 2416 \ 2417 product(bool, RequireSharedSpaces, false, \ 2418 "Require shared spaces for metadata") \ 2419 \ 2420 product(bool, DumpSharedSpaces, false, \ 2421 "Special mode: JVM reads a class list, loads classes, builds " \ 2422 "shared spaces, and dumps the shared spaces to a file to be " \ 2423 "used in future JVM runs") \ 2424 \ 2425 product(bool, PrintSharedArchiveAndExit, false, \ 2426 "Print shared archive file contents") \ 2427 \ 2428 product(bool, PrintSharedDictionary, false, \ 2429 "If PrintSharedArchiveAndExit is true, also print the shared " \ 2430 "dictionary") \ 2431 \ 2432 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 2433 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 2434 "Address to allocate shared memory region for class data") \ 2435 range(0, SIZE_MAX) \ 2436 \ 2437 product(ccstr, SharedArchiveConfigFile, NULL, \ 2438 "Data to add to the CDS archive file") \ 2439 \ 2440 product(uintx, SharedSymbolTableBucketSize, 4, \ 2441 "Average number of symbols per bucket in shared table") \ 2442 range(2, 246) \ 2443 \ 2444 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, true, \ 2445 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 2446 "classes. Just exclude them from the shared dictionary.") \ 2447 \ 2448 diagnostic(bool, PrintMethodHandleStubs, false, \ 2449 "Print generated stub code for method handles") \ 2450 \ 2451 develop(bool, TraceMethodHandles, false, \ 2452 "trace internal method handle operations") \ 2453 \ 2454 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 2455 "perform extra checks when constructing method handles") \ 2456 \ 2457 diagnostic(bool, ShowHiddenFrames, false, \ 2458 "show method handle implementation frames (usually hidden)") \ 2459 \ 2460 experimental(bool, TrustFinalNonStaticFields, false, \ 2461 "trust final non-static declarations for constant folding") \ 2462 \ 2463 diagnostic(bool, FoldStableValues, true, \ 2464 "Optimize loads from stable fields (marked w/ @Stable)") \ 2465 \ 2466 develop(bool, TraceInvokeDynamic, false, \ 2467 "trace internal invoke dynamic operations") \ 2468 \ 2469 diagnostic(int, UseBootstrapCallInfo, 1, \ 2470 "0: when resolving InDy or ConDy, force all BSM arguments to be " \ 2471 "resolved before the bootstrap method is called; 1: when a BSM " \ 2472 "that may accept a BootstrapCallInfo is detected, use that API " \ 2473 "to pass BSM arguments, which allows the BSM to delay their " \ 2474 "resolution; 2+: stress test the BCI API by calling more BSMs " \ 2475 "via that API, instead of with the eagerly-resolved array.") \ 2476 \ 2477 diagnostic(bool, PauseAtStartup, false, \ 2478 "Causes the VM to pause at startup time and wait for the pause " \ 2479 "file to be removed (default: ./vm.paused.<pid>)") \ 2480 \ 2481 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 2482 "The file to create and for whose removal to await when pausing " \ 2483 "at startup. (default: ./vm.paused.<pid>)") \ 2484 \ 2485 diagnostic(bool, PauseAtExit, false, \ 2486 "Pause and wait for keypress on exit if a debugger is attached") \ 2487 \ 2488 product(bool, ExtendedDTraceProbes, false, \ 2489 "Enable performance-impacting dtrace probes") \ 2490 \ 2491 product(bool, DTraceMethodProbes, false, \ 2492 "Enable dtrace probes for method-entry and method-exit") \ 2493 \ 2494 product(bool, DTraceAllocProbes, false, \ 2495 "Enable dtrace probes for object allocation") \ 2496 \ 2497 product(bool, DTraceMonitorProbes, false, \ 2498 "Enable dtrace probes for monitor events") \ 2499 \ 2500 product(bool, RelaxAccessControlCheck, false, \ 2501 "Relax the access control checks in the verifier") \ 2502 \ 2503 product(uintx, StringTableSize, defaultStringTableSize, \ 2504 "Number of buckets in the interned String table " \ 2505 "(will be rounded to nearest higher power of 2)") \ 2506 range(minimumStringTableSize, 16777216ul) \ 2507 \ 2508 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 2509 "Number of buckets in the JVM internal Symbol table") \ 2510 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 2511 \ 2512 product(bool, UseStringDeduplication, false, \ 2513 "Use string deduplication") \ 2514 \ 2515 product(uintx, StringDeduplicationAgeThreshold, 3, \ 2516 "A string must reach this age (or be promoted to an old region) " \ 2517 "to be considered for deduplication") \ 2518 range(1, markOopDesc::max_age) \ 2519 \ 2520 diagnostic(bool, StringDeduplicationResizeALot, false, \ 2521 "Force table resize every time the table is scanned") \ 2522 \ 2523 diagnostic(bool, StringDeduplicationRehashALot, false, \ 2524 "Force table rehash every time the table is scanned") \ 2525 \ 2526 diagnostic(bool, WhiteBoxAPI, false, \ 2527 "Enable internal testing APIs") \ 2528 \ 2529 experimental(intx, SurvivorAlignmentInBytes, 0, \ 2530 "Default survivor space alignment in bytes") \ 2531 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 2532 \ 2533 product(ccstr, DumpLoadedClassList, NULL, \ 2534 "Dump the names all loaded classes, that could be stored into " \ 2535 "the CDS archive, in the specified file") \ 2536 \ 2537 product(ccstr, SharedClassListFile, NULL, \ 2538 "Override the default CDS class list") \ 2539 \ 2540 product(ccstr, SharedArchiveFile, NULL, \ 2541 "Override the default location of the CDS archive file") \ 2542 \ 2543 product(ccstr, ExtraSharedClassListFile, NULL, \ 2544 "Extra classlist for building the CDS archive file") \ 2545 \ 2546 experimental(size_t, ArrayAllocatorMallocLimit, \ 2547 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 2548 "Allocation less than this value will be allocated " \ 2549 "using malloc. Larger allocations will use mmap.") \ 2550 \ 2551 experimental(bool, AlwaysAtomicAccesses, false, \ 2552 "Accesses to all variables should always be atomic") \ 2553 \ 2554 diagnostic(bool, UseUnalignedAccesses, false, \ 2555 "Use unaligned memory accesses in Unsafe") \ 2556 \ 2557 product_pd(bool, PreserveFramePointer, \ 2558 "Use the FP register for holding the frame pointer " \ 2559 "and not as a general purpose register.") \ 2560 \ 2561 diagnostic(bool, CheckIntrinsics, true, \ 2562 "When a class C is loaded, check that " \ 2563 "(1) all intrinsics defined by the VM for class C are present "\ 2564 "in the loaded class file and are marked with the " \ 2565 "@HotSpotIntrinsicCandidate annotation, that " \ 2566 "(2) there is an intrinsic registered for all loaded methods " \ 2567 "that are annotated with the @HotSpotIntrinsicCandidate " \ 2568 "annotation, and that " \ 2569 "(3) no orphan methods exist for class C (i.e., methods for " \ 2570 "which the VM declares an intrinsic but that are not declared "\ 2571 "in the loaded class C. " \ 2572 "Check (3) is available only in debug builds.") \ 2573 \ 2574 diagnostic_pd(intx, InitArrayShortSize, \ 2575 "Threshold small size (in bytes) for clearing arrays. " \ 2576 "Anything this size or smaller may get converted to discrete " \ 2577 "scalar stores.") \ 2578 range(0, max_intx) \ 2579 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ 2580 \ 2581 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 2582 "Disable backwards compatibility for compile commands.") \ 2583 \ 2584 diagnostic(bool, CompilerDirectivesPrint, false, \ 2585 "Print compiler directives on installation.") \ 2586 diagnostic(int, CompilerDirectivesLimit, 50, \ 2587 "Limit on number of compiler directives.") \ 2588 \ 2589 product(ccstr, AllocateHeapAt, NULL, \ 2590 "Path to the directoy where a temporary file will be created " \ 2591 "to use as the backing store for Java Heap.") \ 2592 \ 2593 develop(bool, VerifyMetaspace, false, \ 2594 "Verify metaspace on chunk movements.") \ 2595 \ 2596 diagnostic(bool, ShowRegistersOnAssert, false, \ 2597 "On internal errors, include registers in error report.") \ 2598 \ 2599 experimental(bool, UseSwitchProfiling, true, \ 2600 "leverage profiling for table/lookup switch") \ 2601 \ 2602 JFR_ONLY(product(bool, FlightRecorder, false, \ 2603 "Enable Flight Recorder")) \ 2604 \ 2605 JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL, \ 2606 "Flight Recorder options")) \ 2607 \ 2608 JFR_ONLY(product(ccstr, StartFlightRecording, NULL, \ 2609 "Start flight recording with options")) \ 2610 \ 2611 experimental(bool, UseFastUnorderedTimeStamps, false, \ 2612 "Use platform unstable time where supported for timestamps only") 2613 2614 #define VM_FLAGS(develop, \ 2615 develop_pd, \ 2616 product, \ 2617 product_pd, \ 2618 diagnostic, \ 2619 diagnostic_pd, \ 2620 experimental, \ 2621 notproduct, \ 2622 manageable, \ 2623 product_rw, \ 2624 lp64_product, \ 2625 range, \ 2626 constraint, \ 2627 writeable) \ 2628 \ 2629 RUNTIME_FLAGS( \ 2630 develop, \ 2631 develop_pd, \ 2632 product, \ 2633 product_pd, \ 2634 diagnostic, \ 2635 diagnostic_pd, \ 2636 experimental, \ 2637 notproduct, \ 2638 manageable, \ 2639 product_rw, \ 2640 lp64_product, \ 2641 range, \ 2642 constraint, \ 2643 writeable) \ 2644 \ 2645 GC_FLAGS( \ 2646 develop, \ 2647 develop_pd, \ 2648 product, \ 2649 product_pd, \ 2650 diagnostic, \ 2651 diagnostic_pd, \ 2652 experimental, \ 2653 notproduct, \ 2654 manageable, \ 2655 product_rw, \ 2656 lp64_product, \ 2657 range, \ 2658 constraint, \ 2659 writeable) \ 2660 2661 /* 2662 * Macros for factoring of globals 2663 */ 2664 2665 // Interface macros 2666 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2667 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 2668 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 2669 #define DECLARE_PD_DIAGNOSTIC_FLAG(type, name, doc) extern "C" type name; 2670 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 2671 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 2672 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 2673 #ifdef PRODUCT 2674 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 2675 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 2676 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 2677 #else 2678 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 2679 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 2680 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2681 #endif // PRODUCT 2682 // Special LP64 flags, product only needed for now. 2683 #ifdef _LP64 2684 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2685 #else 2686 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 2687 #endif // _LP64 2688 2689 // Implementation macros 2690 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 2691 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 2692 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 2693 #define MATERIALIZE_PD_DIAGNOSTIC_FLAG(type, name, doc) type name = pd_##name; 2694 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 2695 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 2696 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 2697 #ifdef PRODUCT 2698 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 2699 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 2700 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 2701 #else 2702 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 2703 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 2704 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 2705 #endif // PRODUCT 2706 #ifdef _LP64 2707 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 2708 #else 2709 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 2710 #endif // _LP64 2711 2712 // Only materialize src code for range checking when required, ignore otherwise 2713 #define IGNORE_RANGE(a, b) 2714 // Only materialize src code for contraint checking when required, ignore otherwise 2715 #define IGNORE_CONSTRAINT(func,type) 2716 2717 #define IGNORE_WRITEABLE(type) 2718 2719 VM_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2720 DECLARE_PD_DEVELOPER_FLAG, \ 2721 DECLARE_PRODUCT_FLAG, \ 2722 DECLARE_PD_PRODUCT_FLAG, \ 2723 DECLARE_DIAGNOSTIC_FLAG, \ 2724 DECLARE_PD_DIAGNOSTIC_FLAG, \ 2725 DECLARE_EXPERIMENTAL_FLAG, \ 2726 DECLARE_NOTPRODUCT_FLAG, \ 2727 DECLARE_MANAGEABLE_FLAG, \ 2728 DECLARE_PRODUCT_RW_FLAG, \ 2729 DECLARE_LP64_PRODUCT_FLAG, \ 2730 IGNORE_RANGE, \ 2731 IGNORE_CONSTRAINT, \ 2732 IGNORE_WRITEABLE) 2733 2734 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2735 DECLARE_PD_DEVELOPER_FLAG, \ 2736 DECLARE_PRODUCT_FLAG, \ 2737 DECLARE_PD_PRODUCT_FLAG, \ 2738 DECLARE_DIAGNOSTIC_FLAG, \ 2739 DECLARE_PD_DIAGNOSTIC_FLAG, \ 2740 DECLARE_NOTPRODUCT_FLAG, \ 2741 IGNORE_RANGE, \ 2742 IGNORE_CONSTRAINT, \ 2743 IGNORE_WRITEABLE) 2744 2745 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2746 DECLARE_PRODUCT_FLAG, \ 2747 DECLARE_DIAGNOSTIC_FLAG, \ 2748 DECLARE_EXPERIMENTAL_FLAG, \ 2749 DECLARE_NOTPRODUCT_FLAG, \ 2750 IGNORE_RANGE, \ 2751 IGNORE_CONSTRAINT, \ 2752 IGNORE_WRITEABLE) 2753 2754 // Extensions 2755 2756 #include "runtime/globals_ext.hpp" 2757 2758 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP