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(size_t, LargePageSizeInBytes, 0, \ 349 "Large page size (0 to let VM choose the page size)") \ 350 range(0, max_uintx) \ 351 \ 352 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 353 "Use large pages if maximum heap is at least this big") \ 354 range(0, max_uintx) \ 355 \ 356 product(bool, ForceTimeHighResolution, false, \ 357 "Using high time resolution (for Win32 only)") \ 358 \ 359 develop(bool, TracePcPatching, false, \ 360 "Trace usage of frame::patch_pc") \ 361 \ 362 develop(bool, TraceRelocator, false, \ 363 "Trace the bytecode relocator") \ 364 \ 365 develop(bool, TraceLongCompiles, false, \ 366 "Print out every time compilation is longer than " \ 367 "a given threshold") \ 368 \ 369 develop(bool, SafepointALot, false, \ 370 "Generate a lot of safepoints. This works with " \ 371 "GuaranteedSafepointInterval") \ 372 \ 373 product_pd(bool, BackgroundCompilation, \ 374 "A thread requesting compilation is not blocked during " \ 375 "compilation") \ 376 \ 377 product(bool, PrintVMQWaitTime, false, \ 378 "Print out the waiting time in VM operation queue") \ 379 \ 380 product(bool, MethodFlushing, true, \ 381 "Reclamation of zombie and not-entrant methods") \ 382 \ 383 develop(bool, VerifyStack, false, \ 384 "Verify stack of each thread when it is entering a runtime call") \ 385 \ 386 diagnostic(bool, ForceUnreachable, false, \ 387 "Make all non code cache addresses to be unreachable by " \ 388 "forcing use of 64bit literal fixups") \ 389 \ 390 notproduct(bool, StressDerivedPointers, false, \ 391 "Force scavenge when a derived pointer is detected on stack " \ 392 "after rtm call") \ 393 \ 394 develop(bool, TraceDerivedPointers, false, \ 395 "Trace traversal of derived pointers on stack") \ 396 \ 397 notproduct(bool, TraceCodeBlobStacks, false, \ 398 "Trace stack-walk of codeblobs") \ 399 \ 400 product(bool, PrintJNIResolving, false, \ 401 "Used to implement -v:jni") \ 402 \ 403 notproduct(bool, PrintRewrites, false, \ 404 "Print methods that are being rewritten") \ 405 \ 406 product(bool, UseInlineCaches, true, \ 407 "Use Inline Caches for virtual calls ") \ 408 \ 409 diagnostic(bool, InlineArrayCopy, true, \ 410 "Inline arraycopy native that is known to be part of " \ 411 "base library DLL") \ 412 \ 413 diagnostic(bool, InlineObjectHash, true, \ 414 "Inline Object::hashCode() native that is known to be part " \ 415 "of base library DLL") \ 416 \ 417 diagnostic(bool, InlineNatives, true, \ 418 "Inline natives that are known to be part of base library DLL") \ 419 \ 420 diagnostic(bool, InlineMathNatives, true, \ 421 "Inline SinD, CosD, etc.") \ 422 \ 423 diagnostic(bool, InlineClassNatives, true, \ 424 "Inline Class.isInstance, etc") \ 425 \ 426 diagnostic(bool, InlineThreadNatives, true, \ 427 "Inline Thread.currentThread, etc") \ 428 \ 429 diagnostic(bool, InlineUnsafeOps, true, \ 430 "Inline memory ops (native methods) from Unsafe") \ 431 \ 432 product(bool, CriticalJNINatives, true, \ 433 "Check for critical JNI entry points") \ 434 \ 435 notproduct(bool, StressCriticalJNINatives, false, \ 436 "Exercise register saving code in critical natives") \ 437 \ 438 diagnostic(bool, UseAESIntrinsics, false, \ 439 "Use intrinsics for AES versions of crypto") \ 440 \ 441 diagnostic(bool, UseAESCTRIntrinsics, false, \ 442 "Use intrinsics for the paralleled version of AES/CTR crypto") \ 443 \ 444 diagnostic(bool, UseSHA1Intrinsics, false, \ 445 "Use intrinsics for SHA-1 crypto hash function. " \ 446 "Requires that UseSHA is enabled.") \ 447 \ 448 diagnostic(bool, UseSHA256Intrinsics, false, \ 449 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 450 "Requires that UseSHA is enabled.") \ 451 \ 452 diagnostic(bool, UseSHA512Intrinsics, false, \ 453 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 454 "Requires that UseSHA is enabled.") \ 455 \ 456 diagnostic(bool, UseCRC32Intrinsics, false, \ 457 "use intrinsics for java.util.zip.CRC32") \ 458 \ 459 diagnostic(bool, UseCRC32CIntrinsics, false, \ 460 "use intrinsics for java.util.zip.CRC32C") \ 461 \ 462 diagnostic(bool, UseAdler32Intrinsics, false, \ 463 "use intrinsics for java.util.zip.Adler32") \ 464 \ 465 diagnostic(bool, UseVectorizedMismatchIntrinsic, false, \ 466 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ 467 \ 468 diagnostic(ccstrlist, DisableIntrinsic, "", \ 469 "do not expand intrinsics whose (internal) names appear here") \ 470 \ 471 develop(bool, TraceCallFixup, false, \ 472 "Trace all call fixups") \ 473 \ 474 develop(bool, DeoptimizeALot, false, \ 475 "Deoptimize at every exit from the runtime system") \ 476 \ 477 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 478 "A comma separated list of bcis to deoptimize at") \ 479 \ 480 product(bool, DeoptimizeRandom, false, \ 481 "Deoptimize random frames on random exit from the runtime system")\ 482 \ 483 notproduct(bool, ZombieALot, false, \ 484 "Create zombies (non-entrant) at exit from the runtime system") \ 485 \ 486 product(bool, UnlinkSymbolsALot, false, \ 487 "Unlink unreferenced symbols from the symbol table at safepoints")\ 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 experimental(ccstr, SyncKnobs, NULL, \ 831 "(Unstable) Various monitor synchronization tunables") \ 832 \ 833 experimental(intx, EmitSync, 0, \ 834 "(Unsafe, Unstable) " \ 835 "Control emission of inline sync fast-path code") \ 836 \ 837 product(intx, MonitorBound, 0, "Bound Monitor population") \ 838 range(0, max_jint) \ 839 \ 840 product(bool, MonitorInUseLists, true, "Track Monitors for Deflation") \ 841 \ 842 experimental(intx, MonitorUsedDeflationThreshold, 90, \ 843 "Percentage of used monitors before triggering cleanup " \ 844 "safepoint which deflates monitors (0 is off). " \ 845 "The check is performed on GuaranteedSafepointInterval.") \ 846 range(0, 100) \ 847 \ 848 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 849 "Experimental Sync flags") \ 850 \ 851 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 852 \ 853 experimental(intx, hashCode, 5, \ 854 "(Unstable) select hashCode generation algorithm") \ 855 \ 856 product(bool, FilterSpuriousWakeups, true, \ 857 "When true prevents OS-level spurious, or premature, wakeups " \ 858 "from Object.wait (Ignored for Windows)") \ 859 \ 860 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 861 \ 862 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 863 \ 864 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 865 \ 866 develop(bool, UsePthreads, false, \ 867 "Use pthread-based instead of libthread-based synchronization " \ 868 "(SPARC only)") \ 869 \ 870 product(bool, ReduceSignalUsage, false, \ 871 "Reduce the use of OS signals in Java and/or the VM") \ 872 \ 873 develop_pd(bool, ShareVtableStubs, \ 874 "Share vtable stubs (smaller code but worse branch prediction") \ 875 \ 876 develop(bool, LoadLineNumberTables, true, \ 877 "Tell whether the class file parser loads line number tables") \ 878 \ 879 develop(bool, LoadLocalVariableTables, true, \ 880 "Tell whether the class file parser loads local variable tables") \ 881 \ 882 develop(bool, LoadLocalVariableTypeTables, true, \ 883 "Tell whether the class file parser loads local variable type" \ 884 "tables") \ 885 \ 886 product(bool, AllowUserSignalHandlers, false, \ 887 "Do not complain if the application installs signal handlers " \ 888 "(Solaris & Linux only)") \ 889 \ 890 product(bool, UseSignalChaining, true, \ 891 "Use signal-chaining to invoke signal handlers installed " \ 892 "by the application (Solaris & Linux only)") \ 893 \ 894 product(bool, AllowJNIEnvProxy, false, \ 895 "Allow JNIEnv proxies for jdbx") \ 896 \ 897 product(bool, RestoreMXCSROnJNICalls, false, \ 898 "Restore MXCSR when returning from JNI calls") \ 899 \ 900 product(bool, CheckJNICalls, false, \ 901 "Verify all arguments to JNI calls") \ 902 \ 903 product(bool, UseFastJNIAccessors, true, \ 904 "Use optimized versions of Get<Primitive>Field") \ 905 \ 906 product(intx, MaxJNILocalCapacity, 65536, \ 907 "Maximum allowable local JNI handle capacity to " \ 908 "EnsureLocalCapacity() and PushLocalFrame(), " \ 909 "where <= 0 is unlimited, default: 65536") \ 910 range(min_intx, max_intx) \ 911 \ 912 product(bool, EagerXrunInit, false, \ 913 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 914 "but not all -Xrun libraries may support the state of the VM " \ 915 "at this time") \ 916 \ 917 product(bool, PreserveAllAnnotations, false, \ 918 "Preserve RuntimeInvisibleAnnotations as well " \ 919 "as RuntimeVisibleAnnotations") \ 920 \ 921 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 922 "Number of OutOfMemoryErrors preallocated with backtrace") \ 923 \ 924 product(bool, UseXMMForArrayCopy, false, \ 925 "Use SSE2 MOVQ instruction for Arraycopy") \ 926 \ 927 product(intx, FieldsAllocationStyle, 1, \ 928 "0 - type based with oops first, " \ 929 "1 - with oops last, " \ 930 "2 - oops in super and sub classes are together") \ 931 range(0, 2) \ 932 \ 933 product(bool, CompactFields, true, \ 934 "Allocate nonstatic fields in gaps between previous fields") \ 935 \ 936 notproduct(bool, PrintFieldLayout, false, \ 937 "Print field layout for each class") \ 938 \ 939 /* Need to limit the extent of the padding to reasonable size. */\ 940 /* 8K is well beyond the reasonable HW cache line size, even with */\ 941 /* aggressive prefetching, while still leaving the room for segregating */\ 942 /* among the distinct pages. */\ 943 product(intx, ContendedPaddingWidth, 128, \ 944 "How many bytes to pad the fields/classes marked @Contended with")\ 945 range(0, 8192) \ 946 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 947 \ 948 product(bool, EnableContended, true, \ 949 "Enable @Contended annotation support") \ 950 \ 951 product(bool, RestrictContended, true, \ 952 "Restrict @Contended to trusted classes") \ 953 \ 954 product(bool, UseBiasedLocking, true, \ 955 "Enable biased locking in JVM") \ 956 \ 957 product(intx, BiasedLockingStartupDelay, 0, \ 958 "Number of milliseconds to wait before enabling biased locking") \ 959 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 960 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 961 \ 962 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 963 "Print statistics of biased locking in JVM") \ 964 \ 965 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 966 "Threshold of number of revocations per type to try to " \ 967 "rebias all objects in the heap of that type") \ 968 range(0, max_intx) \ 969 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 970 \ 971 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 972 "Threshold of number of revocations per type to permanently " \ 973 "revoke biases of all objects in the heap of that type") \ 974 range(0, max_intx) \ 975 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 976 \ 977 product(intx, BiasedLockingDecayTime, 25000, \ 978 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 979 "type after previous bulk rebias") \ 980 range(500, max_intx) \ 981 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 982 \ 983 product(bool, ExitOnOutOfMemoryError, false, \ 984 "JVM exits on the first occurrence of an out-of-memory error") \ 985 \ 986 product(bool, CrashOnOutOfMemoryError, false, \ 987 "JVM aborts, producing an error log and core/mini dump, on the " \ 988 "first occurrence of an out-of-memory error") \ 989 \ 990 /* tracing */ \ 991 \ 992 develop(bool, StressRewriter, false, \ 993 "Stress linktime bytecode rewriting") \ 994 \ 995 product(ccstr, TraceJVMTI, NULL, \ 996 "Trace flags for JVMTI functions and events") \ 997 \ 998 /* This option can change an EMCP method into an obsolete method. */ \ 999 /* This can affect tests that except specific methods to be EMCP. */ \ 1000 /* This option should be used with caution. */ \ 1001 product(bool, StressLdcRewrite, false, \ 1002 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1003 \ 1004 /* change to false by default sometime after Mustang */ \ 1005 product(bool, VerifyMergedCPBytecodes, true, \ 1006 "Verify bytecodes after RedefineClasses constant pool merging") \ 1007 \ 1008 develop(bool, TraceBytecodes, false, \ 1009 "Trace bytecode execution") \ 1010 \ 1011 develop(bool, TraceICs, false, \ 1012 "Trace inline cache changes") \ 1013 \ 1014 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1015 "Trace method invocation counter overflow") \ 1016 \ 1017 develop(bool, TraceInlineCacheClearing, false, \ 1018 "Trace clearing of inline caches in nmethods") \ 1019 \ 1020 develop(bool, TraceDependencies, false, \ 1021 "Trace dependencies") \ 1022 \ 1023 develop(bool, VerifyDependencies, trueInDebug, \ 1024 "Exercise and verify the compilation dependency mechanism") \ 1025 \ 1026 develop(bool, TraceNewOopMapGeneration, false, \ 1027 "Trace OopMapGeneration") \ 1028 \ 1029 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1030 "Trace OopMapGeneration: print detailed cell states") \ 1031 \ 1032 develop(bool, TimeOopMap, false, \ 1033 "Time calls to GenerateOopMap::compute_map() in sum") \ 1034 \ 1035 develop(bool, TimeOopMap2, false, \ 1036 "Time calls to GenerateOopMap::compute_map() individually") \ 1037 \ 1038 develop(bool, TraceOopMapRewrites, false, \ 1039 "Trace rewriting of method oops during oop map generation") \ 1040 \ 1041 develop(bool, TraceICBuffer, false, \ 1042 "Trace usage of IC buffer") \ 1043 \ 1044 develop(bool, TraceCompiledIC, false, \ 1045 "Trace changes of compiled IC") \ 1046 \ 1047 develop(bool, FLSVerifyDictionary, false, \ 1048 "Do lots of (expensive) FLS dictionary verification") \ 1049 \ 1050 \ 1051 notproduct(bool, CheckMemoryInitialization, false, \ 1052 "Check memory initialization") \ 1053 \ 1054 product(uintx, ProcessDistributionStride, 4, \ 1055 "Stride through processors when distributing processes") \ 1056 range(0, max_juint) \ 1057 \ 1058 develop(bool, TraceFinalizerRegistration, false, \ 1059 "Trace registration of final references") \ 1060 \ 1061 product(bool, IgnoreEmptyClassPaths, false, \ 1062 "Ignore empty path elements in -classpath") \ 1063 \ 1064 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 1065 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 1066 "Initial size of the boot class loader data metaspace") \ 1067 range(30*K, max_uintx/BytesPerWord) \ 1068 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 1069 \ 1070 product(bool, PrintHeapAtSIGBREAK, true, \ 1071 "Print heap layout in response to SIGBREAK") \ 1072 \ 1073 manageable(bool, PrintClassHistogram, false, \ 1074 "Print a histogram of class instances") \ 1075 \ 1076 develop(bool, IgnoreLibthreadGPFault, false, \ 1077 "Suppress workaround for libthread GP fault") \ 1078 \ 1079 experimental(double, ObjectCountCutOffPercent, 0.5, \ 1080 "The percentage of the used heap that the instances of a class " \ 1081 "must occupy for the class to generate a trace event") \ 1082 range(0.0, 100.0) \ 1083 \ 1084 /* JVMTI heap profiling */ \ 1085 \ 1086 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 1087 "Trace JVMTI object tagging calls") \ 1088 \ 1089 diagnostic(bool, VerifyBeforeIteration, false, \ 1090 "Verify memory system before JVMTI iteration") \ 1091 \ 1092 /* compiler interface */ \ 1093 \ 1094 develop(bool, CIPrintCompilerName, false, \ 1095 "when CIPrint is active, print the name of the active compiler") \ 1096 \ 1097 diagnostic(bool, CIPrintCompileQueue, false, \ 1098 "display the contents of the compile queue whenever a " \ 1099 "compilation is enqueued") \ 1100 \ 1101 develop(bool, CIPrintRequests, false, \ 1102 "display every request for compilation") \ 1103 \ 1104 product(bool, CITime, false, \ 1105 "collect timing information for compilation") \ 1106 \ 1107 develop(bool, CITimeVerbose, false, \ 1108 "be more verbose in compilation timings") \ 1109 \ 1110 develop(bool, CITimeEach, false, \ 1111 "display timing information after each successful compilation") \ 1112 \ 1113 develop(bool, CICountOSR, false, \ 1114 "use a separate counter when assigning ids to osr compilations") \ 1115 \ 1116 develop(bool, CICompileNatives, true, \ 1117 "compile native methods if supported by the compiler") \ 1118 \ 1119 develop_pd(bool, CICompileOSR, \ 1120 "compile on stack replacement methods if supported by the " \ 1121 "compiler") \ 1122 \ 1123 develop(bool, CIPrintMethodCodes, false, \ 1124 "print method bytecodes of the compiled code") \ 1125 \ 1126 develop(bool, CIPrintTypeFlow, false, \ 1127 "print the results of ciTypeFlow analysis") \ 1128 \ 1129 develop(bool, CITraceTypeFlow, false, \ 1130 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 1131 \ 1132 develop(intx, OSROnlyBCI, -1, \ 1133 "OSR only at this bci. Negative values mean exclude that bci") \ 1134 \ 1135 /* compiler */ \ 1136 \ 1137 /* notice: the max range value here is max_jint, not max_intx */ \ 1138 /* because of overflow issue */ \ 1139 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 1140 "Number of compiler threads to run") \ 1141 range(0, max_jint) \ 1142 constraint(CICompilerCountConstraintFunc, AfterErgo) \ 1143 \ 1144 product(bool, UseDynamicNumberOfCompilerThreads, true, \ 1145 "Dynamically choose the number of parallel compiler threads") \ 1146 \ 1147 diagnostic(bool, ReduceNumberOfCompilerThreads, true, \ 1148 "Reduce the number of parallel compiler threads when they " \ 1149 "are not used") \ 1150 \ 1151 diagnostic(bool, TraceCompilerThreads, false, \ 1152 "Trace creation and removal of compiler threads") \ 1153 \ 1154 develop(bool, InjectCompilerCreationFailure, false, \ 1155 "Inject thread creation failures for " \ 1156 "UseDynamicNumberOfCompilerThreads") \ 1157 \ 1158 product(intx, CompilationPolicyChoice, 0, \ 1159 "which compilation policy (0-2)") \ 1160 range(0, 2) \ 1161 \ 1162 develop(bool, UseStackBanging, true, \ 1163 "use stack banging for stack overflow checks (required for " \ 1164 "proper StackOverflow handling; disable only to measure cost " \ 1165 "of stackbanging)") \ 1166 \ 1167 develop(bool, UseStrictFP, true, \ 1168 "use strict fp if modifier strictfp is set") \ 1169 \ 1170 develop(bool, GenerateSynchronizationCode, true, \ 1171 "generate locking/unlocking code for synchronized methods and " \ 1172 "monitors") \ 1173 \ 1174 develop(bool, GenerateRangeChecks, true, \ 1175 "Generate range checks for array accesses") \ 1176 \ 1177 diagnostic_pd(bool, ImplicitNullChecks, \ 1178 "Generate code for implicit null checks") \ 1179 \ 1180 product_pd(bool, TrapBasedNullChecks, \ 1181 "Generate code for null checks that uses a cmp and trap " \ 1182 "instruction raising SIGTRAP. This is only used if an access to" \ 1183 "null (+offset) will not raise a SIGSEGV, i.e.," \ 1184 "ImplicitNullChecks don't work (PPC64).") \ 1185 \ 1186 product(bool, PrintSafepointStatistics, false, \ 1187 "(Deprecated) Print statistics about safepoint synchronization") \ 1188 \ 1189 product(intx, PrintSafepointStatisticsCount, 300, \ 1190 "(Deprecated) Total number of safepoint statistics collected " \ 1191 "before printing them out") \ 1192 range(1, max_intx) \ 1193 \ 1194 product(intx, PrintSafepointStatisticsTimeout, -1, \ 1195 "(Deprecated) Print safepoint statistics only when safepoint takes " \ 1196 "more than PrintSafepointSatisticsTimeout in millis") \ 1197 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 1198 NOT_LP64(range(-1, max_intx)) \ 1199 \ 1200 diagnostic(bool, EnableThreadSMRExtraValidityChecks, true, \ 1201 "Enable Thread SMR extra validity checks") \ 1202 \ 1203 diagnostic(bool, EnableThreadSMRStatistics, trueInDebug, \ 1204 "Enable Thread SMR Statistics") \ 1205 \ 1206 product(bool, Inline, true, \ 1207 "Enable inlining") \ 1208 \ 1209 product(bool, ClipInlining, true, \ 1210 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 1211 \ 1212 develop(bool, UseCHA, true, \ 1213 "Enable CHA") \ 1214 \ 1215 product(bool, UseTypeProfile, true, \ 1216 "Check interpreter profile for historically monomorphic calls") \ 1217 \ 1218 diagnostic(bool, PrintInlining, false, \ 1219 "Print inlining optimizations") \ 1220 \ 1221 product(bool, UsePopCountInstruction, false, \ 1222 "Use population count instruction") \ 1223 \ 1224 develop(bool, EagerInitialization, false, \ 1225 "Eagerly initialize classes if possible") \ 1226 \ 1227 diagnostic(bool, LogTouchedMethods, false, \ 1228 "Log methods which have been ever touched in runtime") \ 1229 \ 1230 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 1231 "Print all methods that have been ever touched in runtime") \ 1232 \ 1233 develop(bool, TraceMethodReplacement, false, \ 1234 "Print when methods are replaced do to recompilation") \ 1235 \ 1236 develop(bool, PrintMethodFlushing, false, \ 1237 "Print the nmethods being flushed") \ 1238 \ 1239 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 1240 "print statistics about method flushing") \ 1241 \ 1242 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 1243 "Number of compiled code invocations after which " \ 1244 "the method is considered as hot by the flusher") \ 1245 range(1, max_jint) \ 1246 \ 1247 diagnostic(intx, MinPassesBeforeFlush, 10, \ 1248 "Minimum number of sweeper passes before an nmethod " \ 1249 "can be flushed") \ 1250 range(0, max_intx) \ 1251 \ 1252 product(bool, UseCodeAging, true, \ 1253 "Insert counter to detect warm methods") \ 1254 \ 1255 diagnostic(bool, StressCodeAging, false, \ 1256 "Start with counters compiled in") \ 1257 \ 1258 develop(bool, StressCodeBuffers, false, \ 1259 "Exercise code buffer expansion and other rare state changes") \ 1260 \ 1261 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 1262 "Generate extra debugging information for non-safepoints in " \ 1263 "nmethods") \ 1264 \ 1265 product(bool, PrintVMOptions, false, \ 1266 "Print flags that appeared on the command line") \ 1267 \ 1268 product(bool, IgnoreUnrecognizedVMOptions, false, \ 1269 "Ignore unrecognized VM options") \ 1270 \ 1271 product(bool, PrintCommandLineFlags, false, \ 1272 "Print flags specified on command line or set by ergonomics") \ 1273 \ 1274 product(bool, PrintFlagsInitial, false, \ 1275 "Print all VM flags before argument processing and exit VM") \ 1276 \ 1277 product(bool, PrintFlagsFinal, false, \ 1278 "Print all VM flags after argument and ergonomic processing") \ 1279 \ 1280 notproduct(bool, PrintFlagsWithComments, false, \ 1281 "Print all VM flags with default values and descriptions and " \ 1282 "exit") \ 1283 \ 1284 product(bool, PrintFlagsRanges, false, \ 1285 "Print VM flags and their ranges and exit VM") \ 1286 \ 1287 diagnostic(bool, SerializeVMOutput, true, \ 1288 "Use a mutex to serialize output to tty and LogFile") \ 1289 \ 1290 diagnostic(bool, DisplayVMOutput, true, \ 1291 "Display all VM output on the tty, independently of LogVMOutput") \ 1292 \ 1293 diagnostic(bool, LogVMOutput, false, \ 1294 "Save VM output to LogFile") \ 1295 \ 1296 diagnostic(ccstr, LogFile, NULL, \ 1297 "If LogVMOutput or LogCompilation is on, save VM output to " \ 1298 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 1299 \ 1300 product(ccstr, ErrorFile, NULL, \ 1301 "If an error occurs, save the error data to this file " \ 1302 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 1303 \ 1304 product(bool, DisplayVMOutputToStderr, false, \ 1305 "If DisplayVMOutput is true, display all VM output to stderr") \ 1306 \ 1307 product(bool, DisplayVMOutputToStdout, false, \ 1308 "If DisplayVMOutput is true, display all VM output to stdout") \ 1309 \ 1310 product(bool, UseHeavyMonitors, false, \ 1311 "use heavyweight instead of lightweight Java monitors") \ 1312 \ 1313 product(bool, PrintStringTableStatistics, false, \ 1314 "print statistics about the StringTable and SymbolTable") \ 1315 \ 1316 diagnostic(bool, VerifyStringTableAtExit, false, \ 1317 "verify StringTable contents at exit") \ 1318 \ 1319 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 1320 "print histogram of the symbol table") \ 1321 \ 1322 notproduct(bool, ExitVMOnVerifyError, false, \ 1323 "standard exit from VM if bytecode verify error " \ 1324 "(only in debug mode)") \ 1325 \ 1326 diagnostic(ccstr, AbortVMOnException, NULL, \ 1327 "Call fatal if this exception is thrown. Example: " \ 1328 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 1329 \ 1330 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 1331 "Call fatal if the exception pointed by AbortVMOnException " \ 1332 "has this message") \ 1333 \ 1334 develop(bool, DebugVtables, false, \ 1335 "add debugging code to vtable dispatch") \ 1336 \ 1337 notproduct(bool, PrintVtableStats, false, \ 1338 "print vtables stats at end of run") \ 1339 \ 1340 develop(bool, TraceCreateZombies, false, \ 1341 "trace creation of zombie nmethods") \ 1342 \ 1343 notproduct(bool, IgnoreLockingAssertions, false, \ 1344 "disable locking assertions (for speed)") \ 1345 \ 1346 product(bool, RangeCheckElimination, true, \ 1347 "Eliminate range checks") \ 1348 \ 1349 develop_pd(bool, UncommonNullCast, \ 1350 "track occurrences of null in casts; adjust compiler tactics") \ 1351 \ 1352 develop(bool, TypeProfileCasts, true, \ 1353 "treat casts like calls for purposes of type profiling") \ 1354 \ 1355 develop(bool, DelayCompilationDuringStartup, true, \ 1356 "Delay invoking the compiler until main application class is " \ 1357 "loaded") \ 1358 \ 1359 develop(bool, CompileTheWorld, false, \ 1360 "Compile all methods in all classes in bootstrap class path " \ 1361 "(stress test)") \ 1362 \ 1363 develop(bool, CompileTheWorldPreloadClasses, true, \ 1364 "Preload all classes used by a class before start loading") \ 1365 \ 1366 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 1367 "Force a safepoint every n compiles so sweeper can keep up") \ 1368 \ 1369 develop(bool, FillDelaySlots, true, \ 1370 "Fill delay slots (on SPARC only)") \ 1371 \ 1372 develop(bool, TimeLivenessAnalysis, false, \ 1373 "Time computation of bytecode liveness analysis") \ 1374 \ 1375 develop(bool, TraceLivenessGen, false, \ 1376 "Trace the generation of liveness analysis information") \ 1377 \ 1378 notproduct(bool, TraceLivenessQuery, false, \ 1379 "Trace queries of liveness analysis information") \ 1380 \ 1381 notproduct(bool, CollectIndexSetStatistics, false, \ 1382 "Collect information about IndexSets") \ 1383 \ 1384 develop(bool, UseLoopSafepoints, true, \ 1385 "Generate Safepoint nodes in every loop") \ 1386 \ 1387 develop(intx, FastAllocateSizeLimit, 128*K, \ 1388 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 1389 "Inline allocations larger than this in doublewords must go slow")\ 1390 \ 1391 product(bool, AggressiveOpts, false, \ 1392 "(Deprecated) Enable aggressive optimizations - see arguments.cpp") \ 1393 \ 1394 product_pd(bool, CompactStrings, \ 1395 "Enable Strings to use single byte chars in backing store") \ 1396 \ 1397 product_pd(uintx, TypeProfileLevel, \ 1398 "=XYZ, with Z: Type profiling of arguments at call; " \ 1399 "Y: Type profiling of return value at call; " \ 1400 "X: Type profiling of parameters to methods; " \ 1401 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 1402 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 1403 \ 1404 product(intx, TypeProfileArgsLimit, 2, \ 1405 "max number of call arguments to consider for type profiling") \ 1406 range(0, 16) \ 1407 \ 1408 product(intx, TypeProfileParmsLimit, 2, \ 1409 "max number of incoming parameters to consider for type profiling"\ 1410 ", -1 for all") \ 1411 range(-1, 64) \ 1412 \ 1413 /* statistics */ \ 1414 develop(bool, CountCompiledCalls, false, \ 1415 "Count method invocations") \ 1416 \ 1417 notproduct(bool, CountRuntimeCalls, false, \ 1418 "Count VM runtime calls") \ 1419 \ 1420 develop(bool, CountJNICalls, false, \ 1421 "Count jni method invocations") \ 1422 \ 1423 notproduct(bool, CountJVMCalls, false, \ 1424 "Count jvm method invocations") \ 1425 \ 1426 notproduct(bool, CountRemovableExceptions, false, \ 1427 "Count exceptions that could be replaced by branches due to " \ 1428 "inlining") \ 1429 \ 1430 notproduct(bool, ICMissHistogram, false, \ 1431 "Produce histogram of IC misses") \ 1432 \ 1433 /* interpreter */ \ 1434 product_pd(bool, RewriteBytecodes, \ 1435 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 1436 \ 1437 product_pd(bool, RewriteFrequentPairs, \ 1438 "Rewrite frequently used bytecode pairs into a single bytecode") \ 1439 \ 1440 diagnostic(bool, PrintInterpreter, false, \ 1441 "Print the generated interpreter code") \ 1442 \ 1443 product(bool, UseInterpreter, true, \ 1444 "Use interpreter for non-compiled methods") \ 1445 \ 1446 develop(bool, UseFastSignatureHandlers, true, \ 1447 "Use fast signature handlers for native calls") \ 1448 \ 1449 product(bool, UseLoopCounter, true, \ 1450 "Increment invocation counter on backward branch") \ 1451 \ 1452 product_pd(bool, UseOnStackReplacement, \ 1453 "Use on stack replacement, calls runtime if invoc. counter " \ 1454 "overflows in loop") \ 1455 \ 1456 notproduct(bool, TraceOnStackReplacement, false, \ 1457 "Trace on stack replacement") \ 1458 \ 1459 product_pd(bool, PreferInterpreterNativeStubs, \ 1460 "Use always interpreter stubs for native methods invoked via " \ 1461 "interpreter") \ 1462 \ 1463 develop(bool, CountBytecodes, false, \ 1464 "Count number of bytecodes executed") \ 1465 \ 1466 develop(bool, PrintBytecodeHistogram, false, \ 1467 "Print histogram of the executed bytecodes") \ 1468 \ 1469 develop(bool, PrintBytecodePairHistogram, false, \ 1470 "Print histogram of the executed bytecode pairs") \ 1471 \ 1472 diagnostic(bool, PrintSignatureHandlers, false, \ 1473 "Print code generated for native method signature handlers") \ 1474 \ 1475 develop(bool, VerifyOops, false, \ 1476 "Do plausibility checks for oops") \ 1477 \ 1478 develop(bool, CheckUnhandledOops, false, \ 1479 "Check for unhandled oops in VM code") \ 1480 \ 1481 develop(bool, VerifyJNIFields, trueInDebug, \ 1482 "Verify jfieldIDs for instance fields") \ 1483 \ 1484 notproduct(bool, VerifyJNIEnvThread, false, \ 1485 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 1486 "from JNI") \ 1487 \ 1488 develop(bool, VerifyFPU, false, \ 1489 "Verify FPU state (check for NaN's, etc.)") \ 1490 \ 1491 develop(bool, VerifyThread, false, \ 1492 "Watch the thread register for corruption (SPARC only)") \ 1493 \ 1494 develop(bool, VerifyActivationFrameSize, false, \ 1495 "Verify that activation frame didn't become smaller than its " \ 1496 "minimal size") \ 1497 \ 1498 develop(bool, TraceFrequencyInlining, false, \ 1499 "Trace frequency based inlining") \ 1500 \ 1501 develop_pd(bool, InlineIntrinsics, \ 1502 "Inline intrinsics that can be statically resolved") \ 1503 \ 1504 product_pd(bool, ProfileInterpreter, \ 1505 "Profile at the bytecode level during interpretation") \ 1506 \ 1507 develop(bool, TraceProfileInterpreter, false, \ 1508 "Trace profiling at the bytecode level during interpretation. " \ 1509 "This outputs the profiling information collected to improve " \ 1510 "jit compilation.") \ 1511 \ 1512 develop_pd(bool, ProfileTraps, \ 1513 "Profile deoptimization traps at the bytecode level") \ 1514 \ 1515 product(intx, ProfileMaturityPercentage, 20, \ 1516 "number of method invocations/branches (expressed as % of " \ 1517 "CompileThreshold) before using the method's profile") \ 1518 range(0, 100) \ 1519 \ 1520 diagnostic(bool, PrintMethodData, false, \ 1521 "Print the results of +ProfileInterpreter at end of run") \ 1522 \ 1523 develop(bool, VerifyDataPointer, trueInDebug, \ 1524 "Verify the method data pointer during interpreter profiling") \ 1525 \ 1526 develop(bool, VerifyCompiledCode, false, \ 1527 "Include miscellaneous runtime verifications in nmethod code; " \ 1528 "default off because it disturbs nmethod size heuristics") \ 1529 \ 1530 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 1531 "Manually make GC thread crash then dump java stack trace; " \ 1532 "Test only") \ 1533 \ 1534 /* compilation */ \ 1535 product(bool, UseCompiler, true, \ 1536 "Use Just-In-Time compilation") \ 1537 \ 1538 develop(bool, TraceCompilationPolicy, false, \ 1539 "Trace compilation policy") \ 1540 \ 1541 develop(bool, TimeCompilationPolicy, false, \ 1542 "Time the compilation policy") \ 1543 \ 1544 product(bool, UseCounterDecay, true, \ 1545 "Adjust recompilation counters") \ 1546 \ 1547 develop(intx, CounterHalfLifeTime, 30, \ 1548 "Half-life time of invocation counters (in seconds)") \ 1549 \ 1550 develop(intx, CounterDecayMinIntervalLength, 500, \ 1551 "The minimum interval (in milliseconds) between invocation of " \ 1552 "CounterDecay") \ 1553 \ 1554 product(bool, AlwaysCompileLoopMethods, false, \ 1555 "When using recompilation, never interpret methods " \ 1556 "containing loops") \ 1557 \ 1558 product(bool, DontCompileHugeMethods, true, \ 1559 "Do not compile methods > HugeMethodLimit") \ 1560 \ 1561 /* Bytecode escape analysis estimation. */ \ 1562 product(bool, EstimateArgEscape, true, \ 1563 "Analyze bytecodes to estimate escape state of arguments") \ 1564 \ 1565 product(intx, BCEATraceLevel, 0, \ 1566 "How much tracing to do of bytecode escape analysis estimates " \ 1567 "(0-3)") \ 1568 range(0, 3) \ 1569 \ 1570 product(intx, MaxBCEAEstimateLevel, 5, \ 1571 "Maximum number of nested calls that are analyzed by BC EA") \ 1572 range(0, max_jint) \ 1573 \ 1574 product(intx, MaxBCEAEstimateSize, 150, \ 1575 "Maximum bytecode size of a method to be analyzed by BC EA") \ 1576 range(0, max_jint) \ 1577 \ 1578 product(intx, AllocatePrefetchStyle, 1, \ 1579 "0 = no prefetch, " \ 1580 "1 = generate prefetch instructions for each allocation, " \ 1581 "2 = use TLAB watermark to gate allocation prefetch, " \ 1582 "3 = generate one prefetch instruction per cache line") \ 1583 range(0, 3) \ 1584 \ 1585 product(intx, AllocatePrefetchDistance, -1, \ 1586 "Distance to prefetch ahead of allocation pointer. " \ 1587 "-1: use system-specific value (automatically determined") \ 1588 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 1589 \ 1590 product(intx, AllocatePrefetchLines, 3, \ 1591 "Number of lines to prefetch ahead of array allocation pointer") \ 1592 range(1, 64) \ 1593 \ 1594 product(intx, AllocateInstancePrefetchLines, 1, \ 1595 "Number of lines to prefetch ahead of instance allocation " \ 1596 "pointer") \ 1597 range(1, 64) \ 1598 \ 1599 product(intx, AllocatePrefetchStepSize, 16, \ 1600 "Step size in bytes of sequential prefetch instructions") \ 1601 range(1, 512) \ 1602 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 1603 \ 1604 product(intx, AllocatePrefetchInstr, 0, \ 1605 "Select instruction to prefetch ahead of allocation pointer") \ 1606 constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit) \ 1607 \ 1608 /* deoptimization */ \ 1609 develop(bool, TraceDeoptimization, false, \ 1610 "Trace deoptimization") \ 1611 \ 1612 develop(bool, PrintDeoptimizationDetails, false, \ 1613 "Print more information about deoptimization") \ 1614 \ 1615 develop(bool, DebugDeoptimization, false, \ 1616 "Tracing various information while debugging deoptimization") \ 1617 \ 1618 product(intx, SelfDestructTimer, 0, \ 1619 "Will cause VM to terminate after a given time (in minutes) " \ 1620 "(0 means off)") \ 1621 range(0, max_intx) \ 1622 \ 1623 product(intx, MaxJavaStackTraceDepth, 1024, \ 1624 "The maximum number of lines in the stack trace for Java " \ 1625 "exceptions (0 means all)") \ 1626 range(0, max_jint/2) \ 1627 \ 1628 /* notice: the max range value here is max_jint, not max_intx */ \ 1629 /* because of overflow issue */ \ 1630 diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 1631 "Guarantee a safepoint (at least) every so many milliseconds " \ 1632 "(0 means none)") \ 1633 range(0, max_jint) \ 1634 \ 1635 product(intx, SafepointTimeoutDelay, 10000, \ 1636 "Delay in milliseconds for option SafepointTimeout") \ 1637 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 1638 NOT_LP64(range(0, max_intx)) \ 1639 \ 1640 product(intx, NmethodSweepActivity, 10, \ 1641 "Removes cold nmethods from code cache if > 0. Higher values " \ 1642 "result in more aggressive sweeping") \ 1643 range(0, 2000) \ 1644 \ 1645 notproduct(bool, LogSweeper, false, \ 1646 "Keep a ring buffer of sweeper activity") \ 1647 \ 1648 notproduct(intx, SweeperLogEntries, 1024, \ 1649 "Number of records in the ring buffer of sweeper activity") \ 1650 \ 1651 notproduct(intx, MemProfilingInterval, 500, \ 1652 "Time between each invocation of the MemProfiler") \ 1653 \ 1654 develop(intx, MallocCatchPtr, -1, \ 1655 "Hit breakpoint when mallocing/freeing this pointer") \ 1656 \ 1657 notproduct(ccstrlist, SuppressErrorAt, "", \ 1658 "List of assertions (file:line) to muzzle") \ 1659 \ 1660 develop(intx, StackPrintLimit, 100, \ 1661 "number of stack frames to print in VM-level stack dump") \ 1662 \ 1663 notproduct(intx, MaxElementPrintSize, 256, \ 1664 "maximum number of elements to print") \ 1665 \ 1666 notproduct(intx, MaxSubklassPrintSize, 4, \ 1667 "maximum number of subklasses to print when printing klass") \ 1668 \ 1669 product(intx, MaxInlineLevel, 9, \ 1670 "maximum number of nested calls that are inlined") \ 1671 range(0, max_jint) \ 1672 \ 1673 product(intx, MaxRecursiveInlineLevel, 1, \ 1674 "maximum number of nested recursive calls that are inlined") \ 1675 range(0, max_jint) \ 1676 \ 1677 develop(intx, MaxForceInlineLevel, 100, \ 1678 "maximum number of nested calls that are forced for inlining " \ 1679 "(using CompileCommand or marked w/ @ForceInline)") \ 1680 range(0, max_jint) \ 1681 \ 1682 product_pd(intx, InlineSmallCode, \ 1683 "Only inline already compiled methods if their code size is " \ 1684 "less than this") \ 1685 range(0, max_jint) \ 1686 \ 1687 product(intx, MaxInlineSize, 35, \ 1688 "The maximum bytecode size of a method to be inlined") \ 1689 range(0, max_jint) \ 1690 \ 1691 product_pd(intx, FreqInlineSize, \ 1692 "The maximum bytecode size of a frequent method to be inlined") \ 1693 range(0, max_jint) \ 1694 \ 1695 product(intx, MaxTrivialSize, 6, \ 1696 "The maximum bytecode size of a trivial method to be inlined") \ 1697 range(0, max_jint) \ 1698 \ 1699 product(intx, MinInliningThreshold, 250, \ 1700 "The minimum invocation count a method needs to have to be " \ 1701 "inlined") \ 1702 range(0, max_jint) \ 1703 \ 1704 develop(intx, MethodHistogramCutoff, 100, \ 1705 "The cutoff value for method invocation histogram (+CountCalls)") \ 1706 \ 1707 diagnostic(intx, ProfilerNumberOfInterpretedMethods, 25, \ 1708 "Number of interpreted methods to show in profile") \ 1709 \ 1710 diagnostic(intx, ProfilerNumberOfCompiledMethods, 25, \ 1711 "Number of compiled methods to show in profile") \ 1712 \ 1713 diagnostic(intx, ProfilerNumberOfStubMethods, 25, \ 1714 "Number of stub methods to show in profile") \ 1715 \ 1716 diagnostic(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 1717 "Number of runtime stub nodes to show in profile") \ 1718 \ 1719 product(intx, ProfileIntervalsTicks, 100, \ 1720 "Number of ticks between printing of interval profile " \ 1721 "(+ProfileIntervals)") \ 1722 range(0, max_intx) \ 1723 \ 1724 develop(intx, DontYieldALotInterval, 10, \ 1725 "Interval between which yields will be dropped (milliseconds)") \ 1726 \ 1727 develop(intx, ProfilerPCTickThreshold, 15, \ 1728 "Number of ticks in a PC buckets to be a hotspot") \ 1729 \ 1730 notproduct(intx, DeoptimizeALotInterval, 5, \ 1731 "Number of exits until DeoptimizeALot kicks in") \ 1732 \ 1733 notproduct(intx, ZombieALotInterval, 5, \ 1734 "Number of exits until ZombieALot kicks in") \ 1735 \ 1736 diagnostic(uintx, MallocMaxTestWords, 0, \ 1737 "If non-zero, maximum number of words that malloc/realloc can " \ 1738 "allocate (for testing only)") \ 1739 range(0, max_uintx) \ 1740 \ 1741 product(intx, TypeProfileWidth, 2, \ 1742 "Number of receiver types to record in call/cast profile") \ 1743 range(0, 8) \ 1744 \ 1745 develop(intx, BciProfileWidth, 2, \ 1746 "Number of return bci's to record in ret profile") \ 1747 \ 1748 product(intx, PerMethodRecompilationCutoff, 400, \ 1749 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 1750 range(-1, max_intx) \ 1751 \ 1752 product(intx, PerBytecodeRecompilationCutoff, 200, \ 1753 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 1754 range(-1, max_intx) \ 1755 \ 1756 product(intx, PerMethodTrapLimit, 100, \ 1757 "Limit on traps (of one kind) in a method (includes inlines)") \ 1758 range(0, max_jint) \ 1759 \ 1760 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 1761 "Limit on speculative traps (of one kind) in a method " \ 1762 "(includes inlines)") \ 1763 range(0, max_jint) \ 1764 \ 1765 product(intx, PerBytecodeTrapLimit, 4, \ 1766 "Limit on traps (of one kind) at a particular BCI") \ 1767 range(0, max_jint) \ 1768 \ 1769 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 1770 "Extra method data trap entries for speculation") \ 1771 \ 1772 develop(intx, InlineFrequencyRatio, 20, \ 1773 "Ratio of call site execution to caller method invocation") \ 1774 range(0, max_jint) \ 1775 \ 1776 diagnostic_pd(intx, InlineFrequencyCount, \ 1777 "Count of call site execution necessary to trigger frequent " \ 1778 "inlining") \ 1779 range(0, max_jint) \ 1780 \ 1781 develop(intx, InlineThrowCount, 50, \ 1782 "Force inlining of interpreted methods that throw this often") \ 1783 range(0, max_jint) \ 1784 \ 1785 develop(intx, InlineThrowMaxSize, 200, \ 1786 "Force inlining of throwing methods smaller than this") \ 1787 range(0, max_jint) \ 1788 \ 1789 develop(intx, ProfilerNodeSize, 1024, \ 1790 "Size in K to allocate for the Profile Nodes of each thread") \ 1791 range(0, 1024) \ 1792 \ 1793 product_pd(size_t, MetaspaceSize, \ 1794 "Initial threshold (in bytes) at which a garbage collection " \ 1795 "is done to reduce Metaspace usage") \ 1796 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 1797 \ 1798 product(size_t, MaxMetaspaceSize, max_uintx, \ 1799 "Maximum size of Metaspaces (in bytes)") \ 1800 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 1801 \ 1802 product(size_t, CompressedClassSpaceSize, 1*G, \ 1803 "Maximum size of class area in Metaspace when compressed " \ 1804 "class pointers are used") \ 1805 range(1*M, 3*G) \ 1806 \ 1807 manageable(uintx, MinHeapFreeRatio, 40, \ 1808 "The minimum percentage of heap free after GC to avoid expansion."\ 1809 " For most GCs this applies to the old generation. In G1 and" \ 1810 " ParallelGC it applies to the whole heap.") \ 1811 range(0, 100) \ 1812 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 1813 \ 1814 manageable(uintx, MaxHeapFreeRatio, 70, \ 1815 "The maximum percentage of heap free after GC to avoid shrinking."\ 1816 " For most GCs this applies to the old generation. In G1 and" \ 1817 " ParallelGC it applies to the whole heap.") \ 1818 range(0, 100) \ 1819 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 1820 \ 1821 product(bool, ShrinkHeapInSteps, true, \ 1822 "When disabled, informs the GC to shrink the java heap directly" \ 1823 " to the target size at the next full GC rather than requiring" \ 1824 " smaller steps during multiple full GCs.") \ 1825 \ 1826 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 1827 "Number of milliseconds per MB of free space in the heap") \ 1828 range(0, max_intx) \ 1829 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 1830 \ 1831 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 1832 "The minimum change in heap space due to GC (in bytes)") \ 1833 range(0, max_uintx) \ 1834 \ 1835 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 1836 "The minimum expansion of Metaspace (in bytes)") \ 1837 range(0, max_uintx) \ 1838 \ 1839 product(uintx, MaxMetaspaceFreeRatio, 70, \ 1840 "The maximum percentage of Metaspace free after GC to avoid " \ 1841 "shrinking") \ 1842 range(0, 100) \ 1843 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 1844 \ 1845 product(uintx, MinMetaspaceFreeRatio, 40, \ 1846 "The minimum percentage of Metaspace free after GC to avoid " \ 1847 "expansion") \ 1848 range(0, 99) \ 1849 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 1850 \ 1851 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 1852 "The maximum expansion of Metaspace without full GC (in bytes)") \ 1853 range(0, max_uintx) \ 1854 \ 1855 /* stack parameters */ \ 1856 product_pd(intx, StackYellowPages, \ 1857 "Number of yellow zone (recoverable overflows) pages of size " \ 1858 "4KB. If pages are bigger yellow zone is aligned up.") \ 1859 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 1860 \ 1861 product_pd(intx, StackRedPages, \ 1862 "Number of red zone (unrecoverable overflows) pages of size " \ 1863 "4KB. If pages are bigger red zone is aligned up.") \ 1864 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 1865 \ 1866 product_pd(intx, StackReservedPages, \ 1867 "Number of reserved zone (reserved to annotated methods) pages" \ 1868 " of size 4KB. If pages are bigger reserved zone is aligned up.") \ 1869 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ 1870 \ 1871 product(bool, RestrictReservedStack, true, \ 1872 "Restrict @ReservedStackAccess to trusted classes") \ 1873 \ 1874 /* greater stack shadow pages can't generate instruction to bang stack */ \ 1875 product_pd(intx, StackShadowPages, \ 1876 "Number of shadow zone (for overflow checking) pages of size " \ 1877 "4KB. If pages are bigger shadow zone is aligned up. " \ 1878 "This should exceed the depth of the VM and native call stack.") \ 1879 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 1880 \ 1881 product_pd(intx, ThreadStackSize, \ 1882 "Thread Stack Size (in Kbytes)") \ 1883 range(0, 1 * M) \ 1884 \ 1885 product_pd(intx, VMThreadStackSize, \ 1886 "Non-Java Thread Stack Size (in Kbytes)") \ 1887 range(0, max_intx/(1 * K)) \ 1888 \ 1889 product_pd(intx, CompilerThreadStackSize, \ 1890 "Compiler Thread Stack Size (in Kbytes)") \ 1891 range(0, max_intx/(1 * K)) \ 1892 \ 1893 develop_pd(size_t, JVMInvokeMethodSlack, \ 1894 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 1895 \ 1896 /* code cache parameters */ \ 1897 develop_pd(uintx, CodeCacheSegmentSize, \ 1898 "Code cache segment size (in bytes) - smallest unit of " \ 1899 "allocation") \ 1900 range(1, 1024) \ 1901 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 1902 \ 1903 develop_pd(intx, CodeEntryAlignment, \ 1904 "Code entry alignment for generated code (in bytes)") \ 1905 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 1906 \ 1907 product_pd(intx, OptoLoopAlignment, \ 1908 "Align inner loops to zero relative to this modulus") \ 1909 range(1, 16) \ 1910 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 1911 \ 1912 product_pd(uintx, InitialCodeCacheSize, \ 1913 "Initial code cache size (in bytes)") \ 1914 range(os::vm_page_size(), max_uintx) \ 1915 \ 1916 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 1917 "Minimum code cache size (in bytes) required to start VM.") \ 1918 range(0, max_uintx) \ 1919 \ 1920 product(bool, SegmentedCodeCache, false, \ 1921 "Use a segmented code cache") \ 1922 \ 1923 product_pd(uintx, ReservedCodeCacheSize, \ 1924 "Reserved code cache size (in bytes) - maximum code cache size") \ 1925 range(os::vm_page_size(), max_uintx) \ 1926 \ 1927 product_pd(uintx, NonProfiledCodeHeapSize, \ 1928 "Size of code heap with non-profiled methods (in bytes)") \ 1929 range(0, max_uintx) \ 1930 \ 1931 product_pd(uintx, ProfiledCodeHeapSize, \ 1932 "Size of code heap with profiled methods (in bytes)") \ 1933 range(0, max_uintx) \ 1934 \ 1935 product_pd(uintx, NonNMethodCodeHeapSize, \ 1936 "Size of code heap with non-nmethods (in bytes)") \ 1937 range(os::vm_page_size(), max_uintx) \ 1938 \ 1939 product_pd(uintx, CodeCacheExpansionSize, \ 1940 "Code cache expansion size (in bytes)") \ 1941 range(32*K, max_uintx) \ 1942 \ 1943 diagnostic_pd(uintx, CodeCacheMinBlockLength, \ 1944 "Minimum number of segments in a code cache block") \ 1945 range(1, 100) \ 1946 \ 1947 notproduct(bool, ExitOnFullCodeCache, false, \ 1948 "Exit the VM if we fill the code cache") \ 1949 \ 1950 product(bool, UseCodeCacheFlushing, true, \ 1951 "Remove cold/old nmethods from the code cache") \ 1952 \ 1953 product(uintx, StartAggressiveSweepingAt, 10, \ 1954 "Start aggressive sweeping if X[%] of the code cache is free." \ 1955 "Segmented code cache: X[%] of the non-profiled heap." \ 1956 "Non-segmented code cache: X[%] of the total code cache") \ 1957 range(0, 100) \ 1958 \ 1959 /* AOT parameters */ \ 1960 product(bool, UseAOT, AOT_ONLY(true) NOT_AOT(false), \ 1961 "Use AOT compiled files") \ 1962 \ 1963 product(ccstrlist, AOTLibrary, NULL, \ 1964 "AOT library") \ 1965 \ 1966 product(bool, PrintAOT, false, \ 1967 "Print used AOT klasses and methods") \ 1968 \ 1969 notproduct(bool, PrintAOTStatistics, false, \ 1970 "Print AOT statistics") \ 1971 \ 1972 diagnostic(bool, UseAOTStrictLoading, false, \ 1973 "Exit the VM if any of the AOT libraries has invalid config") \ 1974 \ 1975 product(bool, CalculateClassFingerprint, false, \ 1976 "Calculate class fingerprint") \ 1977 \ 1978 /* interpreter debugging */ \ 1979 develop(intx, BinarySwitchThreshold, 5, \ 1980 "Minimal number of lookupswitch entries for rewriting to binary " \ 1981 "switch") \ 1982 \ 1983 develop(intx, StopInterpreterAt, 0, \ 1984 "Stop interpreter execution at specified bytecode number") \ 1985 \ 1986 develop(intx, TraceBytecodesAt, 0, \ 1987 "Trace bytecodes starting with specified bytecode number") \ 1988 \ 1989 /* compiler interface */ \ 1990 develop(intx, CIStart, 0, \ 1991 "The id of the first compilation to permit") \ 1992 \ 1993 develop(intx, CIStop, max_jint, \ 1994 "The id of the last compilation to permit") \ 1995 \ 1996 develop(intx, CIStartOSR, 0, \ 1997 "The id of the first osr compilation to permit " \ 1998 "(CICountOSR must be on)") \ 1999 \ 2000 develop(intx, CIStopOSR, max_jint, \ 2001 "The id of the last osr compilation to permit " \ 2002 "(CICountOSR must be on)") \ 2003 \ 2004 develop(intx, CIBreakAtOSR, -1, \ 2005 "The id of osr compilation to break at") \ 2006 \ 2007 develop(intx, CIBreakAt, -1, \ 2008 "The id of compilation to break at") \ 2009 \ 2010 product(ccstrlist, CompileOnly, "", \ 2011 "List of methods (pkg/class.name) to restrict compilation to") \ 2012 \ 2013 product(ccstr, CompileCommandFile, NULL, \ 2014 "Read compiler commands from this file [.hotspot_compiler]") \ 2015 \ 2016 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 2017 "Read compiler directives from this file") \ 2018 \ 2019 product(ccstrlist, CompileCommand, "", \ 2020 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 2021 \ 2022 develop(bool, ReplayCompiles, false, \ 2023 "Enable replay of compilations from ReplayDataFile") \ 2024 \ 2025 product(ccstr, ReplayDataFile, NULL, \ 2026 "File containing compilation replay information" \ 2027 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 2028 \ 2029 product(ccstr, InlineDataFile, NULL, \ 2030 "File containing inlining replay information" \ 2031 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 2032 \ 2033 develop(intx, ReplaySuppressInitializers, 2, \ 2034 "Control handling of class initialization during replay: " \ 2035 "0 - don't do anything special; " \ 2036 "1 - treat all class initializers as empty; " \ 2037 "2 - treat class initializers for application classes as empty; " \ 2038 "3 - allow all class initializers to run during bootstrap but " \ 2039 " pretend they are empty after starting replay") \ 2040 range(0, 3) \ 2041 \ 2042 develop(bool, ReplayIgnoreInitErrors, false, \ 2043 "Ignore exceptions thrown during initialization for replay") \ 2044 \ 2045 product(bool, DumpReplayDataOnError, true, \ 2046 "Record replay data for crashing compiler threads") \ 2047 \ 2048 product(bool, CICompilerCountPerCPU, false, \ 2049 "1 compiler thread for log(N CPUs)") \ 2050 \ 2051 develop(intx, CIFireOOMAt, -1, \ 2052 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 2053 "(non-negative value throws OOM after this many CI accesses " \ 2054 "in each compile)") \ 2055 notproduct(intx, CICrashAt, -1, \ 2056 "id of compilation to trigger assert in compiler thread for " \ 2057 "the purpose of testing, e.g. generation of replay data") \ 2058 notproduct(bool, CIObjectFactoryVerify, false, \ 2059 "enable potentially expensive verification in ciObjectFactory") \ 2060 \ 2061 /* Priorities */ \ 2062 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 2063 \ 2064 product(intx, ThreadPriorityPolicy, 0, \ 2065 "0 : Normal. "\ 2066 " VM chooses priorities that are appropriate for normal "\ 2067 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 2068 " to normal native priority. Java priorities below " \ 2069 " NORM_PRIORITY map to lower native priority values. On "\ 2070 " Windows applications are allowed to use higher native "\ 2071 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 2072 " not use the highest possible native priority, "\ 2073 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 2074 " system threads. On Linux thread priorities are ignored "\ 2075 " because the OS does not support static priority in "\ 2076 " SCHED_OTHER scheduling class which is the only choice for "\ 2077 " non-root, non-realtime applications. "\ 2078 "1 : Aggressive. "\ 2079 " Java thread priorities map over to the entire range of "\ 2080 " native thread priorities. Higher Java thread priorities map "\ 2081 " to higher native thread priorities. This policy should be "\ 2082 " used with care, as sometimes it can cause performance "\ 2083 " degradation in the application and/or the entire system. On "\ 2084 " Linux this policy requires root privilege.") \ 2085 range(0, 1) \ 2086 \ 2087 product(bool, ThreadPriorityVerbose, false, \ 2088 "Print priority changes") \ 2089 \ 2090 product(intx, CompilerThreadPriority, -1, \ 2091 "The native priority at which compiler threads should run " \ 2092 "(-1 means no change)") \ 2093 range(min_jint, max_jint) \ 2094 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 2095 \ 2096 product(intx, VMThreadPriority, -1, \ 2097 "The native priority at which the VM thread should run " \ 2098 "(-1 means no change)") \ 2099 range(-1, 127) \ 2100 \ 2101 product(bool, CompilerThreadHintNoPreempt, false, \ 2102 "(Solaris only) Give compiler threads an extra quanta") \ 2103 \ 2104 product(bool, VMThreadHintNoPreempt, false, \ 2105 "(Solaris only) Give VM thread an extra quanta") \ 2106 \ 2107 product(intx, JavaPriority1_To_OSPriority, -1, \ 2108 "Map Java priorities to OS priorities") \ 2109 range(-1, 127) \ 2110 \ 2111 product(intx, JavaPriority2_To_OSPriority, -1, \ 2112 "Map Java priorities to OS priorities") \ 2113 range(-1, 127) \ 2114 \ 2115 product(intx, JavaPriority3_To_OSPriority, -1, \ 2116 "Map Java priorities to OS priorities") \ 2117 range(-1, 127) \ 2118 \ 2119 product(intx, JavaPriority4_To_OSPriority, -1, \ 2120 "Map Java priorities to OS priorities") \ 2121 range(-1, 127) \ 2122 \ 2123 product(intx, JavaPriority5_To_OSPriority, -1, \ 2124 "Map Java priorities to OS priorities") \ 2125 range(-1, 127) \ 2126 \ 2127 product(intx, JavaPriority6_To_OSPriority, -1, \ 2128 "Map Java priorities to OS priorities") \ 2129 range(-1, 127) \ 2130 \ 2131 product(intx, JavaPriority7_To_OSPriority, -1, \ 2132 "Map Java priorities to OS priorities") \ 2133 range(-1, 127) \ 2134 \ 2135 product(intx, JavaPriority8_To_OSPriority, -1, \ 2136 "Map Java priorities to OS priorities") \ 2137 range(-1, 127) \ 2138 \ 2139 product(intx, JavaPriority9_To_OSPriority, -1, \ 2140 "Map Java priorities to OS priorities") \ 2141 range(-1, 127) \ 2142 \ 2143 product(intx, JavaPriority10_To_OSPriority,-1, \ 2144 "Map Java priorities to OS priorities") \ 2145 range(-1, 127) \ 2146 \ 2147 experimental(bool, UseCriticalJavaThreadPriority, false, \ 2148 "Java thread priority 10 maps to critical scheduling priority") \ 2149 \ 2150 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 2151 "Compiler thread(s) run at critical scheduling priority") \ 2152 \ 2153 experimental(bool, UseCriticalCMSThreadPriority, false, \ 2154 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 2155 \ 2156 /* compiler debugging */ \ 2157 notproduct(intx, CompileTheWorldStartAt, 1, \ 2158 "First class to consider when using +CompileTheWorld") \ 2159 \ 2160 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 2161 "Last class to consider when using +CompileTheWorld") \ 2162 \ 2163 develop(intx, NewCodeParameter, 0, \ 2164 "Testing Only: Create a dedicated integer parameter before " \ 2165 "putback") \ 2166 \ 2167 /* new oopmap storage allocation */ \ 2168 develop(intx, MinOopMapAllocation, 8, \ 2169 "Minimum number of OopMap entries in an OopMapSet") \ 2170 \ 2171 /* Background Compilation */ \ 2172 develop(intx, LongCompileThreshold, 50, \ 2173 "Used with +TraceLongCompiles") \ 2174 \ 2175 /* recompilation */ \ 2176 product_pd(intx, CompileThreshold, \ 2177 "number of interpreted method invocations before (re-)compiling") \ 2178 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 2179 \ 2180 product(double, CompileThresholdScaling, 1.0, \ 2181 "Factor to control when first compilation happens " \ 2182 "(both with and without tiered compilation): " \ 2183 "values greater than 1.0 delay counter overflow, " \ 2184 "values between 0 and 1.0 rush counter overflow, " \ 2185 "value of 1.0 leaves compilation thresholds unchanged " \ 2186 "value of 0.0 is equivalent to -Xint. " \ 2187 "" \ 2188 "Flag can be set as per-method option. " \ 2189 "If a value is specified for a method, compilation thresholds " \ 2190 "for that method are scaled by both the value of the global flag "\ 2191 "and the value of the per-method flag.") \ 2192 range(0.0, DBL_MAX) \ 2193 \ 2194 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 2195 "Interpreter (tier 0) invocation notification frequency") \ 2196 range(0, 30) \ 2197 \ 2198 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 2199 "C1 without MDO (tier 2) invocation notification frequency") \ 2200 range(0, 30) \ 2201 \ 2202 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 2203 "C1 with MDO profiling (tier 3) invocation notification " \ 2204 "frequency") \ 2205 range(0, 30) \ 2206 \ 2207 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 2208 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 2209 range(0, 30) \ 2210 \ 2211 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 2212 "Interpreter (tier 0) invocation notification frequency") \ 2213 range(0, 30) \ 2214 \ 2215 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 2216 "C1 without MDO (tier 2) invocation notification frequency") \ 2217 range(0, 30) \ 2218 \ 2219 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 2220 "C1 with MDO profiling (tier 3) invocation notification " \ 2221 "frequency") \ 2222 range(0, 30) \ 2223 \ 2224 product(intx, Tier2CompileThreshold, 0, \ 2225 "threshold at which tier 2 compilation is invoked") \ 2226 range(0, max_jint) \ 2227 \ 2228 product(intx, Tier2BackEdgeThreshold, 0, \ 2229 "Back edge threshold at which tier 2 compilation is invoked") \ 2230 range(0, max_jint) \ 2231 \ 2232 product(intx, Tier3InvocationThreshold, 200, \ 2233 "Compile if number of method invocations crosses this " \ 2234 "threshold") \ 2235 range(0, max_jint) \ 2236 \ 2237 product(intx, Tier3MinInvocationThreshold, 100, \ 2238 "Minimum invocation to compile at tier 3") \ 2239 range(0, max_jint) \ 2240 \ 2241 product(intx, Tier3CompileThreshold, 2000, \ 2242 "Threshold at which tier 3 compilation is invoked (invocation " \ 2243 "minimum must be satisfied)") \ 2244 range(0, max_jint) \ 2245 \ 2246 product(intx, Tier3BackEdgeThreshold, 60000, \ 2247 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 2248 range(0, max_jint) \ 2249 \ 2250 product(intx, Tier3AOTInvocationThreshold, 10000, \ 2251 "Compile if number of method invocations crosses this " \ 2252 "threshold if coming from AOT") \ 2253 range(0, max_jint) \ 2254 \ 2255 product(intx, Tier3AOTMinInvocationThreshold, 1000, \ 2256 "Minimum invocation to compile at tier 3 if coming from AOT") \ 2257 range(0, max_jint) \ 2258 \ 2259 product(intx, Tier3AOTCompileThreshold, 15000, \ 2260 "Threshold at which tier 3 compilation is invoked (invocation " \ 2261 "minimum must be satisfied) if coming from AOT") \ 2262 range(0, max_jint) \ 2263 \ 2264 product(intx, Tier3AOTBackEdgeThreshold, 120000, \ 2265 "Back edge threshold at which tier 3 OSR compilation is invoked " \ 2266 "if coming from AOT") \ 2267 range(0, max_jint) \ 2268 \ 2269 product(intx, Tier4InvocationThreshold, 5000, \ 2270 "Compile if number of method invocations crosses this " \ 2271 "threshold") \ 2272 range(0, max_jint) \ 2273 \ 2274 product(intx, Tier4MinInvocationThreshold, 600, \ 2275 "Minimum invocation to compile at tier 4") \ 2276 range(0, max_jint) \ 2277 \ 2278 product(intx, Tier4CompileThreshold, 15000, \ 2279 "Threshold at which tier 4 compilation is invoked (invocation " \ 2280 "minimum must be satisfied") \ 2281 range(0, max_jint) \ 2282 \ 2283 product(intx, Tier4BackEdgeThreshold, 40000, \ 2284 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 2285 range(0, max_jint) \ 2286 \ 2287 product(intx, Tier3DelayOn, 5, \ 2288 "If C2 queue size grows over this amount per compiler thread " \ 2289 "stop compiling at tier 3 and start compiling at tier 2") \ 2290 range(0, max_jint) \ 2291 \ 2292 product(intx, Tier3DelayOff, 2, \ 2293 "If C2 queue size is less than this amount per compiler thread " \ 2294 "allow methods compiled at tier 2 transition to tier 3") \ 2295 range(0, max_jint) \ 2296 \ 2297 product(intx, Tier3LoadFeedback, 5, \ 2298 "Tier 3 thresholds will increase twofold when C1 queue size " \ 2299 "reaches this amount per compiler thread") \ 2300 range(0, max_jint) \ 2301 \ 2302 product(intx, Tier4LoadFeedback, 3, \ 2303 "Tier 4 thresholds will increase twofold when C2 queue size " \ 2304 "reaches this amount per compiler thread") \ 2305 range(0, max_jint) \ 2306 \ 2307 product(intx, TieredCompileTaskTimeout, 50, \ 2308 "Kill compile task if method was not used within " \ 2309 "given timeout in milliseconds") \ 2310 range(0, max_intx) \ 2311 \ 2312 product(intx, TieredStopAtLevel, 4, \ 2313 "Stop at given compilation level") \ 2314 range(0, 4) \ 2315 \ 2316 product(intx, Tier0ProfilingStartPercentage, 200, \ 2317 "Start profiling in interpreter if the counters exceed tier 3 " \ 2318 "thresholds by the specified percentage") \ 2319 range(0, max_jint) \ 2320 \ 2321 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 2322 "Increase the compile threshold for C1 compilation if the code " \ 2323 "cache is filled by the specified percentage") \ 2324 range(0, 99) \ 2325 \ 2326 product(intx, TieredRateUpdateMinTime, 1, \ 2327 "Minimum rate sampling interval (in milliseconds)") \ 2328 range(0, max_intx) \ 2329 \ 2330 product(intx, TieredRateUpdateMaxTime, 25, \ 2331 "Maximum rate sampling interval (in milliseconds)") \ 2332 range(0, max_intx) \ 2333 \ 2334 product_pd(bool, TieredCompilation, \ 2335 "Enable tiered compilation") \ 2336 \ 2337 product(bool, PrintTieredEvents, false, \ 2338 "Print tiered events notifications") \ 2339 \ 2340 product_pd(intx, OnStackReplacePercentage, \ 2341 "NON_TIERED number of method invocations/branches (expressed as " \ 2342 "% of CompileThreshold) before (re-)compiling OSR code") \ 2343 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 2344 \ 2345 product(intx, InterpreterProfilePercentage, 33, \ 2346 "NON_TIERED number of method invocations/branches (expressed as " \ 2347 "% of CompileThreshold) before profiling in the interpreter") \ 2348 range(0, 100) \ 2349 \ 2350 develop(intx, MaxRecompilationSearchLength, 10, \ 2351 "The maximum number of frames to inspect when searching for " \ 2352 "recompilee") \ 2353 \ 2354 develop(intx, MaxInterpretedSearchLength, 3, \ 2355 "The maximum number of interpreted frames to skip when searching "\ 2356 "for recompilee") \ 2357 \ 2358 develop(intx, DesiredMethodLimit, 8000, \ 2359 "The desired maximum method size (in bytecodes) after inlining") \ 2360 \ 2361 develop(intx, HugeMethodLimit, 8000, \ 2362 "Don't compile methods larger than this if " \ 2363 "+DontCompileHugeMethods") \ 2364 \ 2365 /* New JDK 1.4 reflection implementation */ \ 2366 \ 2367 develop(intx, FastSuperclassLimit, 8, \ 2368 "Depth of hardwired instanceof accelerator array") \ 2369 \ 2370 /* Properties for Java libraries */ \ 2371 \ 2372 product(uint64_t, MaxDirectMemorySize, 0, \ 2373 "Maximum total size of NIO direct-buffer allocations") \ 2374 range(0, max_jlong) \ 2375 \ 2376 /* Flags used for temporary code during development */ \ 2377 \ 2378 diagnostic(bool, UseNewCode, false, \ 2379 "Testing Only: Use the new version while testing") \ 2380 \ 2381 diagnostic(bool, UseNewCode2, false, \ 2382 "Testing Only: Use the new version while testing") \ 2383 \ 2384 diagnostic(bool, UseNewCode3, false, \ 2385 "Testing Only: Use the new version while testing") \ 2386 \ 2387 /* flags for performance data collection */ \ 2388 \ 2389 product(bool, UsePerfData, true, \ 2390 "Flag to disable jvmstat instrumentation for performance testing "\ 2391 "and problem isolation purposes") \ 2392 \ 2393 product(bool, PerfDataSaveToFile, false, \ 2394 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 2395 \ 2396 product(ccstr, PerfDataSaveFile, NULL, \ 2397 "Save PerfData memory to the specified absolute pathname. " \ 2398 "The string %p in the file name (if present) " \ 2399 "will be replaced by pid") \ 2400 \ 2401 product(intx, PerfDataSamplingInterval, 50, \ 2402 "Data sampling interval (in milliseconds)") \ 2403 range(PeriodicTask::min_interval, max_jint) \ 2404 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 2405 \ 2406 product(bool, PerfDisableSharedMem, false, \ 2407 "Store performance data in standard memory") \ 2408 \ 2409 product(intx, PerfDataMemorySize, 32*K, \ 2410 "Size of performance data memory region. Will be rounded " \ 2411 "up to a multiple of the native os page size.") \ 2412 range(128, 32*64*K) \ 2413 \ 2414 product(intx, PerfMaxStringConstLength, 1024, \ 2415 "Maximum PerfStringConstant string length before truncation") \ 2416 range(32, 32*K) \ 2417 \ 2418 product(bool, PerfAllowAtExitRegistration, false, \ 2419 "Allow registration of atexit() methods") \ 2420 \ 2421 product(bool, PerfBypassFileSystemCheck, false, \ 2422 "Bypass Win32 file system criteria checks (Windows Only)") \ 2423 \ 2424 product(intx, UnguardOnExecutionViolation, 0, \ 2425 "Unguard page and retry on no-execute fault (Win32 only) " \ 2426 "0=off, 1=conservative, 2=aggressive") \ 2427 range(0, 2) \ 2428 \ 2429 /* Serviceability Support */ \ 2430 \ 2431 product(bool, ManagementServer, false, \ 2432 "Create JMX Management Server") \ 2433 \ 2434 product(bool, DisableAttachMechanism, false, \ 2435 "Disable mechanism that allows tools to attach to this VM") \ 2436 \ 2437 product(bool, StartAttachListener, false, \ 2438 "Always start Attach Listener at VM startup") \ 2439 \ 2440 product(bool, EnableDynamicAgentLoading, true, \ 2441 "Allow tools to load agents with the attach mechanism") \ 2442 \ 2443 manageable(bool, PrintConcurrentLocks, false, \ 2444 "Print java.util.concurrent locks in thread dump") \ 2445 \ 2446 product(bool, TransmitErrorReport, false, \ 2447 "Enable error report transmission on erroneous termination") \ 2448 \ 2449 product(ccstr, ErrorReportServer, NULL, \ 2450 "Override built-in error report server address") \ 2451 \ 2452 /* Shared spaces */ \ 2453 \ 2454 product(bool, UseSharedSpaces, true, \ 2455 "Use shared spaces for metadata") \ 2456 \ 2457 product(bool, VerifySharedSpaces, false, \ 2458 "Verify shared spaces (false for default archive, true for " \ 2459 "archive specified by -XX:SharedArchiveFile)") \ 2460 \ 2461 product(bool, RequireSharedSpaces, false, \ 2462 "Require shared spaces for metadata") \ 2463 \ 2464 product(bool, DumpSharedSpaces, false, \ 2465 "Special mode: JVM reads a class list, loads classes, builds " \ 2466 "shared spaces, and dumps the shared spaces to a file to be " \ 2467 "used in future JVM runs") \ 2468 \ 2469 product(bool, PrintSharedArchiveAndExit, false, \ 2470 "Print shared archive file contents") \ 2471 \ 2472 product(bool, PrintSharedDictionary, false, \ 2473 "If PrintSharedArchiveAndExit is true, also print the shared " \ 2474 "dictionary") \ 2475 \ 2476 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 2477 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 2478 "Address to allocate shared memory region for class data") \ 2479 range(0, SIZE_MAX) \ 2480 \ 2481 product(ccstr, SharedArchiveConfigFile, NULL, \ 2482 "Data to add to the CDS archive file") \ 2483 \ 2484 product(uintx, SharedSymbolTableBucketSize, 4, \ 2485 "Average number of symbols per bucket in shared table") \ 2486 range(2, 246) \ 2487 \ 2488 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, true, \ 2489 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 2490 "classes. Just exclude them from the shared dictionary.") \ 2491 \ 2492 diagnostic(bool, PrintMethodHandleStubs, false, \ 2493 "Print generated stub code for method handles") \ 2494 \ 2495 develop(bool, TraceMethodHandles, false, \ 2496 "trace internal method handle operations") \ 2497 \ 2498 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 2499 "perform extra checks when constructing method handles") \ 2500 \ 2501 diagnostic(bool, ShowHiddenFrames, false, \ 2502 "show method handle implementation frames (usually hidden)") \ 2503 \ 2504 experimental(bool, TrustFinalNonStaticFields, false, \ 2505 "trust final non-static declarations for constant folding") \ 2506 \ 2507 diagnostic(bool, FoldStableValues, true, \ 2508 "Optimize loads from stable fields (marked w/ @Stable)") \ 2509 \ 2510 develop(bool, TraceInvokeDynamic, false, \ 2511 "trace internal invoke dynamic operations") \ 2512 \ 2513 diagnostic(int, UseBootstrapCallInfo, 1, \ 2514 "0: when resolving InDy or ConDy, force all BSM arguments to be " \ 2515 "resolved before the bootstrap method is called; 1: when a BSM " \ 2516 "that may accept a BootstrapCallInfo is detected, use that API " \ 2517 "to pass BSM arguments, which allows the BSM to delay their " \ 2518 "resolution; 2+: stress test the BCI API by calling more BSMs " \ 2519 "via that API, instead of with the eagerly-resolved array.") \ 2520 \ 2521 diagnostic(bool, PauseAtStartup, false, \ 2522 "Causes the VM to pause at startup time and wait for the pause " \ 2523 "file to be removed (default: ./vm.paused.<pid>)") \ 2524 \ 2525 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 2526 "The file to create and for whose removal to await when pausing " \ 2527 "at startup. (default: ./vm.paused.<pid>)") \ 2528 \ 2529 diagnostic(bool, PauseAtExit, false, \ 2530 "Pause and wait for keypress on exit if a debugger is attached") \ 2531 \ 2532 product(bool, ExtendedDTraceProbes, false, \ 2533 "Enable performance-impacting dtrace probes") \ 2534 \ 2535 product(bool, DTraceMethodProbes, false, \ 2536 "Enable dtrace probes for method-entry and method-exit") \ 2537 \ 2538 product(bool, DTraceAllocProbes, false, \ 2539 "Enable dtrace probes for object allocation") \ 2540 \ 2541 product(bool, DTraceMonitorProbes, false, \ 2542 "Enable dtrace probes for monitor events") \ 2543 \ 2544 product(bool, RelaxAccessControlCheck, false, \ 2545 "Relax the access control checks in the verifier") \ 2546 \ 2547 product(uintx, StringTableSize, defaultStringTableSize, \ 2548 "Number of buckets in the interned String table " \ 2549 "(will be rounded to nearest higher power of 2)") \ 2550 range(minimumStringTableSize, 16777216ul) \ 2551 \ 2552 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 2553 "Number of buckets in the JVM internal Symbol table") \ 2554 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 2555 \ 2556 product(bool, UseStringDeduplication, false, \ 2557 "Use string deduplication") \ 2558 \ 2559 product(uintx, StringDeduplicationAgeThreshold, 3, \ 2560 "A string must reach this age (or be promoted to an old region) " \ 2561 "to be considered for deduplication") \ 2562 range(1, markOopDesc::max_age) \ 2563 \ 2564 diagnostic(bool, StringDeduplicationResizeALot, false, \ 2565 "Force table resize every time the table is scanned") \ 2566 \ 2567 diagnostic(bool, StringDeduplicationRehashALot, false, \ 2568 "Force table rehash every time the table is scanned") \ 2569 \ 2570 diagnostic(bool, WhiteBoxAPI, false, \ 2571 "Enable internal testing APIs") \ 2572 \ 2573 experimental(intx, SurvivorAlignmentInBytes, 0, \ 2574 "Default survivor space alignment in bytes") \ 2575 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 2576 \ 2577 product(bool , AllowNonVirtualCalls, false, \ 2578 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 2579 \ 2580 product(ccstr, DumpLoadedClassList, NULL, \ 2581 "Dump the names all loaded classes, that could be stored into " \ 2582 "the CDS archive, in the specified file") \ 2583 \ 2584 product(ccstr, SharedClassListFile, NULL, \ 2585 "Override the default CDS class list") \ 2586 \ 2587 product(ccstr, SharedArchiveFile, NULL, \ 2588 "Override the default location of the CDS archive file") \ 2589 \ 2590 product(ccstr, ExtraSharedClassListFile, NULL, \ 2591 "Extra classlist for building the CDS archive file") \ 2592 \ 2593 experimental(size_t, ArrayAllocatorMallocLimit, \ 2594 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 2595 "Allocation less than this value will be allocated " \ 2596 "using malloc. Larger allocations will use mmap.") \ 2597 \ 2598 experimental(bool, AlwaysAtomicAccesses, false, \ 2599 "Accesses to all variables should always be atomic") \ 2600 \ 2601 diagnostic(bool, UseUnalignedAccesses, false, \ 2602 "Use unaligned memory accesses in Unsafe") \ 2603 \ 2604 product_pd(bool, PreserveFramePointer, \ 2605 "Use the FP register for holding the frame pointer " \ 2606 "and not as a general purpose register.") \ 2607 \ 2608 diagnostic(bool, CheckIntrinsics, true, \ 2609 "When a class C is loaded, check that " \ 2610 "(1) all intrinsics defined by the VM for class C are present "\ 2611 "in the loaded class file and are marked with the " \ 2612 "@HotSpotIntrinsicCandidate annotation, that " \ 2613 "(2) there is an intrinsic registered for all loaded methods " \ 2614 "that are annotated with the @HotSpotIntrinsicCandidate " \ 2615 "annotation, and that " \ 2616 "(3) no orphan methods exist for class C (i.e., methods for " \ 2617 "which the VM declares an intrinsic but that are not declared "\ 2618 "in the loaded class C. " \ 2619 "Check (3) is available only in debug builds.") \ 2620 \ 2621 diagnostic_pd(intx, InitArrayShortSize, \ 2622 "Threshold small size (in bytes) for clearing arrays. " \ 2623 "Anything this size or smaller may get converted to discrete " \ 2624 "scalar stores.") \ 2625 range(0, max_intx) \ 2626 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ 2627 \ 2628 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 2629 "Disable backwards compatibility for compile commands.") \ 2630 \ 2631 diagnostic(bool, CompilerDirectivesPrint, false, \ 2632 "Print compiler directives on installation.") \ 2633 diagnostic(int, CompilerDirectivesLimit, 50, \ 2634 "Limit on number of compiler directives.") \ 2635 \ 2636 product(ccstr, AllocateHeapAt, NULL, \ 2637 "Path to the directoy where a temporary file will be created " \ 2638 "to use as the backing store for Java Heap.") \ 2639 \ 2640 develop(bool, VerifyMetaspace, false, \ 2641 "Verify metaspace on chunk movements.") \ 2642 \ 2643 diagnostic(bool, ShowRegistersOnAssert, false, \ 2644 "On internal errors, include registers in error report.") \ 2645 \ 2646 experimental(bool, UseSwitchProfiling, true, \ 2647 "leverage profiling for table/lookup switch") \ 2648 \ 2649 JFR_ONLY(product(bool, FlightRecorder, false, \ 2650 "Enable Flight Recorder")) \ 2651 \ 2652 JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL, \ 2653 "Flight Recorder options")) \ 2654 \ 2655 JFR_ONLY(product(ccstr, StartFlightRecording, NULL, \ 2656 "Start flight recording with options")) \ 2657 \ 2658 experimental(bool, UseFastUnorderedTimeStamps, false, \ 2659 "Use platform unstable time where supported for timestamps only") 2660 2661 #define VM_FLAGS(develop, \ 2662 develop_pd, \ 2663 product, \ 2664 product_pd, \ 2665 diagnostic, \ 2666 diagnostic_pd, \ 2667 experimental, \ 2668 notproduct, \ 2669 manageable, \ 2670 product_rw, \ 2671 lp64_product, \ 2672 range, \ 2673 constraint, \ 2674 writeable) \ 2675 \ 2676 RUNTIME_FLAGS( \ 2677 develop, \ 2678 develop_pd, \ 2679 product, \ 2680 product_pd, \ 2681 diagnostic, \ 2682 diagnostic_pd, \ 2683 experimental, \ 2684 notproduct, \ 2685 manageable, \ 2686 product_rw, \ 2687 lp64_product, \ 2688 range, \ 2689 constraint, \ 2690 writeable) \ 2691 \ 2692 GC_FLAGS( \ 2693 develop, \ 2694 develop_pd, \ 2695 product, \ 2696 product_pd, \ 2697 diagnostic, \ 2698 diagnostic_pd, \ 2699 experimental, \ 2700 notproduct, \ 2701 manageable, \ 2702 product_rw, \ 2703 lp64_product, \ 2704 range, \ 2705 constraint, \ 2706 writeable) \ 2707 2708 /* 2709 * Macros for factoring of globals 2710 */ 2711 2712 // Interface macros 2713 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2714 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 2715 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 2716 #define DECLARE_PD_DIAGNOSTIC_FLAG(type, name, doc) extern "C" type name; 2717 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 2718 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 2719 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 2720 #ifdef PRODUCT 2721 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 2722 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 2723 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 2724 #else 2725 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 2726 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 2727 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2728 #endif // PRODUCT 2729 // Special LP64 flags, product only needed for now. 2730 #ifdef _LP64 2731 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2732 #else 2733 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 2734 #endif // _LP64 2735 2736 // Implementation macros 2737 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 2738 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 2739 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 2740 #define MATERIALIZE_PD_DIAGNOSTIC_FLAG(type, name, doc) type name = pd_##name; 2741 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 2742 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 2743 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 2744 #ifdef PRODUCT 2745 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 2746 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 2747 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 2748 #else 2749 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 2750 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 2751 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 2752 #endif // PRODUCT 2753 #ifdef _LP64 2754 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 2755 #else 2756 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 2757 #endif // _LP64 2758 2759 // Only materialize src code for range checking when required, ignore otherwise 2760 #define IGNORE_RANGE(a, b) 2761 // Only materialize src code for contraint checking when required, ignore otherwise 2762 #define IGNORE_CONSTRAINT(func,type) 2763 2764 #define IGNORE_WRITEABLE(type) 2765 2766 VM_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2767 DECLARE_PD_DEVELOPER_FLAG, \ 2768 DECLARE_PRODUCT_FLAG, \ 2769 DECLARE_PD_PRODUCT_FLAG, \ 2770 DECLARE_DIAGNOSTIC_FLAG, \ 2771 DECLARE_PD_DIAGNOSTIC_FLAG, \ 2772 DECLARE_EXPERIMENTAL_FLAG, \ 2773 DECLARE_NOTPRODUCT_FLAG, \ 2774 DECLARE_MANAGEABLE_FLAG, \ 2775 DECLARE_PRODUCT_RW_FLAG, \ 2776 DECLARE_LP64_PRODUCT_FLAG, \ 2777 IGNORE_RANGE, \ 2778 IGNORE_CONSTRAINT, \ 2779 IGNORE_WRITEABLE) 2780 2781 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2782 DECLARE_PD_DEVELOPER_FLAG, \ 2783 DECLARE_PRODUCT_FLAG, \ 2784 DECLARE_PD_PRODUCT_FLAG, \ 2785 DECLARE_DIAGNOSTIC_FLAG, \ 2786 DECLARE_PD_DIAGNOSTIC_FLAG, \ 2787 DECLARE_NOTPRODUCT_FLAG, \ 2788 IGNORE_RANGE, \ 2789 IGNORE_CONSTRAINT, \ 2790 IGNORE_WRITEABLE) 2791 2792 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2793 DECLARE_PRODUCT_FLAG, \ 2794 DECLARE_DIAGNOSTIC_FLAG, \ 2795 DECLARE_EXPERIMENTAL_FLAG, \ 2796 DECLARE_NOTPRODUCT_FLAG, \ 2797 IGNORE_RANGE, \ 2798 IGNORE_CONSTRAINT, \ 2799 IGNORE_WRITEABLE) 2800 2801 // Extensions 2802 2803 #include "runtime/globals_ext.hpp" 2804 2805 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP