1 /* 2 * Copyright (c) 1997, 2019, 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_RUNTIME_GLOBALS_HPP 26 #define SHARE_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 // Default and minimum StringTable and SymbolTable size values 57 // Must be powers of 2 58 const size_t defaultStringTableSize = NOT_LP64(1024) LP64_ONLY(65536); 59 const size_t minimumStringTableSize = 128; 60 const size_t defaultSymbolTableSize = 32768; // 2^15 61 const size_t minimumSymbolTableSize = 1024; 62 63 #include CPU_HEADER(globals) 64 #include OS_HEADER(globals) 65 #include OS_CPU_HEADER(globals) 66 #ifdef COMPILER1 67 #include CPU_HEADER(c1_globals) 68 #include OS_HEADER(c1_globals) 69 #endif 70 #ifdef COMPILER2 71 #include CPU_HEADER(c2_globals) 72 #include OS_HEADER(c2_globals) 73 #endif 74 75 #if !defined(COMPILER1) && !defined(COMPILER2) && !INCLUDE_JVMCI 76 define_pd_global(bool, BackgroundCompilation, false); 77 define_pd_global(bool, UseTLAB, false); 78 define_pd_global(bool, CICompileOSR, false); 79 define_pd_global(bool, UseTypeProfile, false); 80 define_pd_global(bool, UseOnStackReplacement, false); 81 define_pd_global(bool, InlineIntrinsics, false); 82 define_pd_global(bool, PreferInterpreterNativeStubs, true); 83 define_pd_global(bool, ProfileInterpreter, false); 84 define_pd_global(bool, ProfileTraps, false); 85 define_pd_global(bool, TieredCompilation, false); 86 87 define_pd_global(intx, CompileThreshold, 0); 88 89 define_pd_global(intx, OnStackReplacePercentage, 0); 90 define_pd_global(bool, ResizeTLAB, false); 91 define_pd_global(intx, FreqInlineSize, 0); 92 define_pd_global(size_t, NewSizeThreadIncrease, 4*K); 93 define_pd_global(bool, InlineClassNatives, true); 94 define_pd_global(bool, InlineUnsafeOps, true); 95 define_pd_global(uintx, InitialCodeCacheSize, 160*K); 96 define_pd_global(uintx, ReservedCodeCacheSize, 32*M); 97 define_pd_global(uintx, NonProfiledCodeHeapSize, 0); 98 define_pd_global(uintx, ProfiledCodeHeapSize, 0); 99 define_pd_global(uintx, NonNMethodCodeHeapSize, 32*M); 100 101 define_pd_global(uintx, CodeCacheExpansionSize, 32*K); 102 define_pd_global(uintx, CodeCacheMinBlockLength, 1); 103 define_pd_global(uintx, CodeCacheMinimumUseSpace, 200*K); 104 define_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 105 define_pd_global(bool, NeverActAsServerClassMachine, true); 106 define_pd_global(uint64_t,MaxRAM, 1ULL*G); 107 #define CI_COMPILER_COUNT 0 108 #else 109 110 #if COMPILER2_OR_JVMCI 111 #define CI_COMPILER_COUNT 2 112 #else 113 #define CI_COMPILER_COUNT 1 114 #endif // COMPILER2_OR_JVMCI 115 116 #endif // no compilers 117 118 // use this for flags that are true by default in the debug version but 119 // false in the optimized version, and vice versa 120 #ifdef ASSERT 121 #define trueInDebug true 122 #define falseInDebug false 123 #else 124 #define trueInDebug false 125 #define falseInDebug true 126 #endif 127 128 // use this for flags that are true per default in the product build 129 // but false in development builds, and vice versa 130 #ifdef PRODUCT 131 #define trueInProduct true 132 #define falseInProduct false 133 #else 134 #define trueInProduct false 135 #define falseInProduct true 136 #endif 137 138 // develop flags are settable / visible only during development and are constant in the PRODUCT version 139 // product flags are always settable / visible 140 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 141 142 // A flag must be declared with one of the following types: 143 // bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 144 // The type "ccstr" is an alias for "const char*" and is used 145 // only in this file, because the macrology requires single-token type names. 146 147 // Note: Diagnostic options not meant for VM tuning or for product modes. 148 // They are to be used for VM quality assurance or field diagnosis 149 // of VM bugs. They are hidden so that users will not be encouraged to 150 // try them as if they were VM ordinary execution options. However, they 151 // are available in the product version of the VM. Under instruction 152 // from support engineers, VM customers can turn them on to collect 153 // diagnostic information about VM problems. To use a VM diagnostic 154 // option, you must first specify +UnlockDiagnosticVMOptions. 155 // (This master switch also affects the behavior of -Xprintflags.) 156 // 157 // experimental flags are in support of features that are not 158 // part of the officially supported product, but are available 159 // for experimenting with. They could, for example, be performance 160 // features that may not have undergone full or rigorous QA, but which may 161 // help performance in some cases and released for experimentation 162 // by the community of users and developers. This flag also allows one to 163 // be able to build a fully supported product that nonetheless also 164 // ships with some unsupported, lightly tested, experimental features. 165 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 166 // UnlockExperimentalVMOptions flag, which allows the control and 167 // modification of the experimental flags. 168 // 169 // Nota bene: neither diagnostic nor experimental options should be used casually, 170 // and they are not supported on production loads, except under explicit 171 // direction from support engineers. 172 // 173 // manageable flags are writeable external product flags. 174 // They are dynamically writeable through the JDK management interface 175 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 176 // These flags are external exported interface (see CCC). The list of 177 // manageable flags can be queried programmatically through the management 178 // interface. 179 // 180 // A flag can be made as "manageable" only if 181 // - the flag is defined in a CCC as an external exported interface. 182 // - the VM implementation supports dynamic setting of the flag. 183 // This implies that the VM must *always* query the flag variable 184 // and not reuse state related to the flag state at any given time. 185 // - you want the flag to be queried programmatically by the customers. 186 // 187 // product_rw flags are writeable internal product flags. 188 // They are like "manageable" flags but for internal/private use. 189 // The list of product_rw flags are internal/private flags which 190 // may be changed/removed in a future release. It can be set 191 // through the management interface to get/set value 192 // when the name of flag is supplied. 193 // 194 // A flag can be made as "product_rw" only if 195 // - the VM implementation supports dynamic setting of the flag. 196 // This implies that the VM must *always* query the flag variable 197 // and not reuse state related to the flag state at any given time. 198 // 199 // Note that when there is a need to support develop flags to be writeable, 200 // it can be done in the same way as product_rw. 201 // 202 // range is a macro that will expand to min and max arguments for range 203 // checking code if provided - see jvmFlagRangeList.hpp 204 // 205 // constraint is a macro that will expand to custom function call 206 // for constraint checking if provided - see jvmFlagConstraintList.hpp 207 // 208 // writeable is a macro that controls if and how the value can change during the runtime 209 // 210 // writeable(Always) is optional and allows the flag to have its value changed 211 // without any limitations at any time 212 // 213 // writeable(Once) flag value's can be only set once during the lifetime of VM 214 // 215 // writeable(CommandLineOnly) flag value's can be only set from command line 216 // (multiple times allowed) 217 // 218 219 220 #define RUNTIME_FLAGS(develop, \ 221 develop_pd, \ 222 product, \ 223 product_pd, \ 224 diagnostic, \ 225 diagnostic_pd, \ 226 experimental, \ 227 notproduct, \ 228 manageable, \ 229 product_rw, \ 230 lp64_product, \ 231 range, \ 232 constraint, \ 233 writeable) \ 234 \ 235 lp64_product(bool, UseCompressedOops, false, \ 236 "Use 32-bit object references in 64-bit VM. " \ 237 "lp64_product means flag is always constant in 32 bit VM") \ 238 \ 239 lp64_product(bool, UseCompressedClassPointers, false, \ 240 "Use 32-bit class pointers in 64-bit VM. " \ 241 "lp64_product means flag is always constant in 32 bit VM") \ 242 \ 243 notproduct(bool, CheckCompressedOops, true, \ 244 "Generate checks in encoding/decoding code in debug VM") \ 245 \ 246 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 247 "Heap allocation steps through preferred address regions to find" \ 248 " where it can allocate the heap. Number of steps to take per " \ 249 "region.") \ 250 range(1, max_uintx) \ 251 \ 252 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 253 "Default object alignment in bytes, 8 is minimum") \ 254 range(8, 256) \ 255 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 256 \ 257 develop(bool, CleanChunkPoolAsync, true, \ 258 "Clean the chunk pool asynchronously") \ 259 \ 260 product_pd(bool, ThreadLocalHandshakes, \ 261 "Use thread-local polls instead of global poll for safepoints.") \ 262 constraint(ThreadLocalHandshakesConstraintFunc,AfterErgo) \ 263 \ 264 diagnostic(uint, HandshakeTimeout, 0, \ 265 "If nonzero set a timeout in milliseconds for handshakes") \ 266 \ 267 experimental(bool, AlwaysSafeConstructors, false, \ 268 "Force safe construction, as if all fields are final.") \ 269 \ 270 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 271 "Enable normal processing of flags relating to field diagnostics")\ 272 \ 273 experimental(bool, UnlockExperimentalVMOptions, false, \ 274 "Enable normal processing of flags relating to experimental " \ 275 "features") \ 276 \ 277 product(bool, JavaMonitorsInStackTrace, true, \ 278 "Print information about Java monitor locks when the stacks are" \ 279 "dumped") \ 280 \ 281 product_pd(bool, UseLargePages, \ 282 "Use large page memory") \ 283 \ 284 product_pd(bool, UseLargePagesIndividualAllocation, \ 285 "Allocate large pages individually for better affinity") \ 286 \ 287 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 288 "Fail large pages individual allocation") \ 289 \ 290 product(bool, UseLargePagesInMetaspace, false, \ 291 "Use large page memory in metaspace. " \ 292 "Only used if UseLargePages is enabled.") \ 293 \ 294 product(bool, UseNUMA, false, \ 295 "Use NUMA if available") \ 296 \ 297 product(bool, UseNUMAInterleaving, false, \ 298 "Interleave memory across NUMA nodes if available") \ 299 \ 300 product(size_t, NUMAInterleaveGranularity, 2*M, \ 301 "Granularity to use for NUMA interleaving on Windows OS") \ 302 range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \ 303 \ 304 product(bool, ForceNUMA, false, \ 305 "Force NUMA optimizations on single-node/UMA systems") \ 306 \ 307 product(uintx, NUMAChunkResizeWeight, 20, \ 308 "Percentage (0-100) used to weight the current sample when " \ 309 "computing exponentially decaying average for " \ 310 "AdaptiveNUMAChunkSizing") \ 311 range(0, 100) \ 312 \ 313 product(size_t, NUMASpaceResizeRate, 1*G, \ 314 "Do not reallocate more than this amount per collection") \ 315 range(0, max_uintx) \ 316 \ 317 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 318 "Enable adaptive chunk sizing for NUMA") \ 319 \ 320 product(bool, NUMAStats, false, \ 321 "Print NUMA stats in detailed heap information") \ 322 \ 323 product(uintx, NUMAPageScanRate, 256, \ 324 "Maximum number of pages to include in the page scan procedure") \ 325 range(0, max_uintx) \ 326 \ 327 product_pd(bool, NeedsDeoptSuspend, \ 328 "True for register window machines (sparc/ia64)") \ 329 \ 330 product(intx, UseSSE, 99, \ 331 "Highest supported SSE instructions set on x86/x64") \ 332 range(0, 99) \ 333 \ 334 product(bool, UseAES, false, \ 335 "Control whether AES instructions are used when available") \ 336 \ 337 product(bool, UseFMA, false, \ 338 "Control whether FMA instructions are used when available") \ 339 \ 340 product(bool, UseSHA, false, \ 341 "Control whether SHA instructions are used when available") \ 342 \ 343 diagnostic(bool, UseGHASHIntrinsics, false, \ 344 "Use intrinsics for GHASH versions of crypto") \ 345 \ 346 product(bool, UseBASE64Intrinsics, false, \ 347 "Use intrinsics for java.util.Base64") \ 348 \ 349 product(size_t, LargePageSizeInBytes, 0, \ 350 "Large page size (0 to let VM choose the page size)") \ 351 range(0, max_uintx) \ 352 \ 353 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 354 "Use large pages if maximum heap is at least this big") \ 355 range(0, max_uintx) \ 356 \ 357 product(bool, ForceTimeHighResolution, false, \ 358 "Using high time resolution (for Win32 only)") \ 359 \ 360 develop(bool, TracePcPatching, false, \ 361 "Trace usage of frame::patch_pc") \ 362 \ 363 develop(bool, TraceRelocator, false, \ 364 "Trace the bytecode relocator") \ 365 \ 366 develop(bool, TraceLongCompiles, false, \ 367 "Print out every time compilation is longer than " \ 368 "a given threshold") \ 369 \ 370 develop(bool, SafepointALot, false, \ 371 "Generate a lot of safepoints. This works with " \ 372 "GuaranteedSafepointInterval") \ 373 \ 374 product_pd(bool, BackgroundCompilation, \ 375 "A thread requesting compilation is not blocked during " \ 376 "compilation") \ 377 \ 378 product(bool, PrintVMQWaitTime, false, \ 379 "Print out the waiting time in VM operation queue") \ 380 \ 381 product(bool, MethodFlushing, true, \ 382 "Reclamation of zombie and not-entrant methods") \ 383 \ 384 develop(bool, VerifyStack, false, \ 385 "Verify stack of each thread when it is entering a runtime call") \ 386 \ 387 diagnostic(bool, ForceUnreachable, false, \ 388 "Make all non code cache addresses to be unreachable by " \ 389 "forcing use of 64bit literal fixups") \ 390 \ 391 notproduct(bool, StressDerivedPointers, false, \ 392 "Force scavenge when a derived pointer is detected on stack " \ 393 "after rtm call") \ 394 \ 395 develop(bool, TraceDerivedPointers, false, \ 396 "Trace traversal of derived pointers on stack") \ 397 \ 398 notproduct(bool, TraceCodeBlobStacks, false, \ 399 "Trace stack-walk of codeblobs") \ 400 \ 401 product(bool, PrintJNIResolving, false, \ 402 "Used to implement -v:jni") \ 403 \ 404 notproduct(bool, PrintRewrites, false, \ 405 "Print methods that are being rewritten") \ 406 \ 407 product(bool, UseInlineCaches, true, \ 408 "Use Inline Caches for virtual calls ") \ 409 \ 410 diagnostic(bool, InlineArrayCopy, true, \ 411 "Inline arraycopy native that is known to be part of " \ 412 "base library DLL") \ 413 \ 414 diagnostic(bool, InlineObjectHash, true, \ 415 "Inline Object::hashCode() native that is known to be part " \ 416 "of base library DLL") \ 417 \ 418 diagnostic(bool, InlineNatives, true, \ 419 "Inline natives that are known to be part of base library DLL") \ 420 \ 421 diagnostic(bool, InlineMathNatives, true, \ 422 "Inline SinD, CosD, etc.") \ 423 \ 424 diagnostic(bool, InlineClassNatives, true, \ 425 "Inline Class.isInstance, etc") \ 426 \ 427 diagnostic(bool, InlineThreadNatives, true, \ 428 "Inline Thread.currentThread, etc") \ 429 \ 430 diagnostic(bool, InlineUnsafeOps, true, \ 431 "Inline memory ops (native methods) from Unsafe") \ 432 \ 433 product(bool, CriticalJNINatives, true, \ 434 "Check for critical JNI entry points") \ 435 \ 436 notproduct(bool, StressCriticalJNINatives, false, \ 437 "Exercise register saving code in critical natives") \ 438 \ 439 diagnostic(bool, UseAESIntrinsics, false, \ 440 "Use intrinsics for AES versions of crypto") \ 441 \ 442 diagnostic(bool, UseAESCTRIntrinsics, false, \ 443 "Use intrinsics for the paralleled version of AES/CTR crypto") \ 444 \ 445 diagnostic(bool, UseSHA1Intrinsics, false, \ 446 "Use intrinsics for SHA-1 crypto hash function. " \ 447 "Requires that UseSHA is enabled.") \ 448 \ 449 diagnostic(bool, UseSHA256Intrinsics, false, \ 450 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 451 "Requires that UseSHA is enabled.") \ 452 \ 453 diagnostic(bool, UseSHA512Intrinsics, false, \ 454 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 455 "Requires that UseSHA is enabled.") \ 456 \ 457 diagnostic(bool, UseCRC32Intrinsics, false, \ 458 "use intrinsics for java.util.zip.CRC32") \ 459 \ 460 diagnostic(bool, UseCRC32CIntrinsics, false, \ 461 "use intrinsics for java.util.zip.CRC32C") \ 462 \ 463 diagnostic(bool, UseAdler32Intrinsics, false, \ 464 "use intrinsics for java.util.zip.Adler32") \ 465 \ 466 diagnostic(bool, UseVectorizedMismatchIntrinsic, false, \ 467 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ 468 \ 469 diagnostic(ccstrlist, DisableIntrinsic, "", \ 470 "do not expand intrinsics whose (internal) names appear here") \ 471 \ 472 develop(bool, TraceCallFixup, false, \ 473 "Trace all call fixups") \ 474 \ 475 develop(bool, DeoptimizeALot, false, \ 476 "Deoptimize at every exit from the runtime system") \ 477 \ 478 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 479 "A comma separated list of bcis to deoptimize at") \ 480 \ 481 product(bool, DeoptimizeRandom, false, \ 482 "Deoptimize random frames on random exit from the runtime system")\ 483 \ 484 notproduct(bool, ZombieALot, false, \ 485 "Create zombies (non-entrant) at exit from the runtime system") \ 486 \ 487 notproduct(bool, WalkStackALot, false, \ 488 "Trace stack (no print) at every exit from the runtime system") \ 489 \ 490 product(bool, Debugging, false, \ 491 "Set when executing debug methods in debug.cpp " \ 492 "(to prevent triggering assertions)") \ 493 \ 494 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 495 "Enable strict checks that safepoints cannot happen for threads " \ 496 "that use NoSafepointVerifier") \ 497 \ 498 notproduct(bool, VerifyLastFrame, false, \ 499 "Verify oops on last frame on entry to VM") \ 500 \ 501 product(bool, FailOverToOldVerifier, true, \ 502 "Fail over to old verifier when split verifier fails") \ 503 \ 504 product(bool, SafepointTimeout, false, \ 505 "Time out and warn or fail after SafepointTimeoutDelay " \ 506 "milliseconds if failed to reach safepoint") \ 507 \ 508 diagnostic(bool, AbortVMOnSafepointTimeout, false, \ 509 "Abort upon failure to reach safepoint (see SafepointTimeout)") \ 510 \ 511 diagnostic(bool, AbortVMOnVMOperationTimeout, false, \ 512 "Abort upon failure to complete VM operation promptly") \ 513 \ 514 diagnostic(intx, AbortVMOnVMOperationTimeoutDelay, 1000, \ 515 "Delay in milliseconds for option AbortVMOnVMOperationTimeout") \ 516 range(0, max_intx) \ 517 \ 518 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 519 /* typically, at most a few retries are needed */ \ 520 product(intx, SuspendRetryCount, 50, \ 521 "Maximum retry count for an external suspend request") \ 522 range(0, max_intx) \ 523 \ 524 product(intx, SuspendRetryDelay, 5, \ 525 "Milliseconds to delay per retry (* current_retry_count)") \ 526 range(0, max_intx) \ 527 \ 528 product(bool, AssertOnSuspendWaitFailure, false, \ 529 "Assert/Guarantee on external suspend wait failure") \ 530 \ 531 product(bool, TraceSuspendWaitFailures, false, \ 532 "Trace external suspend wait failures") \ 533 \ 534 product(bool, MaxFDLimit, true, \ 535 "Bump the number of file descriptors to maximum in Solaris") \ 536 \ 537 diagnostic(bool, LogEvents, true, \ 538 "Enable the various ring buffer event logs") \ 539 \ 540 diagnostic(uintx, LogEventsBufferEntries, 10, \ 541 "Number of ring buffer event logs") \ 542 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 543 \ 544 product(bool, BytecodeVerificationRemote, true, \ 545 "Enable the Java bytecode verifier for remote classes") \ 546 \ 547 product(bool, BytecodeVerificationLocal, false, \ 548 "Enable the Java bytecode verifier for local classes") \ 549 \ 550 develop(bool, ForceFloatExceptions, trueInDebug, \ 551 "Force exceptions on FP stack under/overflow") \ 552 \ 553 develop(bool, VerifyStackAtCalls, false, \ 554 "Verify that the stack pointer is unchanged after calls") \ 555 \ 556 develop(bool, TraceJavaAssertions, false, \ 557 "Trace java language assertions") \ 558 \ 559 notproduct(bool, VerifyCodeCache, false, \ 560 "Verify code cache on memory allocation/deallocation") \ 561 \ 562 develop(bool, UseMallocOnly, false, \ 563 "Use only malloc/free for allocation (no resource area/arena)") \ 564 \ 565 develop(bool, PrintMallocStatistics, false, \ 566 "Print malloc/free statistics") \ 567 \ 568 develop(bool, ZapResourceArea, trueInDebug, \ 569 "Zap freed resource/arena space with 0xABABABAB") \ 570 \ 571 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 572 "Zap freed VM handle space with 0xBCBCBCBC") \ 573 \ 574 notproduct(bool, ZapStackSegments, trueInDebug, \ 575 "Zap allocated/freed stack segments with 0xFADFADED") \ 576 \ 577 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 578 "Zap unused heap space with 0xBAADBABE") \ 579 \ 580 develop(bool, CheckZapUnusedHeapArea, false, \ 581 "Check zapping of unused heap space") \ 582 \ 583 develop(bool, ZapFillerObjects, trueInDebug, \ 584 "Zap filler objects with 0xDEAFBABE") \ 585 \ 586 develop(bool, PrintVMMessages, true, \ 587 "Print VM messages on console") \ 588 \ 589 notproduct(uintx, ErrorHandlerTest, 0, \ 590 "If > 0, provokes an error after VM initialization; the value " \ 591 "determines which error to provoke. See test_error_handler() " \ 592 "in vmError.cpp.") \ 593 \ 594 notproduct(uintx, TestCrashInErrorHandler, 0, \ 595 "If > 0, provokes an error inside VM error handler (a secondary " \ 596 "crash). see test_error_handler() in vmError.cpp") \ 597 \ 598 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 599 "If true, tests SafeFetch inside error handler.") \ 600 \ 601 notproduct(bool, TestUnresponsiveErrorHandler, false, \ 602 "If true, simulates an unresponsive error handler.") \ 603 \ 604 develop(bool, Verbose, false, \ 605 "Print additional debugging information from other modes") \ 606 \ 607 develop(bool, PrintMiscellaneous, false, \ 608 "Print uncategorized debugging information (requires +Verbose)") \ 609 \ 610 develop(bool, WizardMode, false, \ 611 "Print much more debugging information") \ 612 \ 613 product(bool, ShowMessageBoxOnError, false, \ 614 "Keep process alive on VM fatal error") \ 615 \ 616 product(bool, CreateCoredumpOnCrash, true, \ 617 "Create core/mini dump on VM fatal error") \ 618 \ 619 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 620 "Timeout, in seconds, to limit the time spent on writing an " \ 621 "error log in case of a crash.") \ 622 range(0, (uint64_t)max_jlong/1000) \ 623 \ 624 product_pd(bool, UseOSErrorReporting, \ 625 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 626 \ 627 product(bool, SuppressFatalErrorMessage, false, \ 628 "Report NO fatal error message (avoid deadlock)") \ 629 \ 630 product(ccstrlist, OnError, "", \ 631 "Run user-defined commands on fatal error; see VMError.cpp " \ 632 "for examples") \ 633 \ 634 product(ccstrlist, OnOutOfMemoryError, "", \ 635 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 636 \ 637 manageable(bool, HeapDumpBeforeFullGC, false, \ 638 "Dump heap to file before any major stop-the-world GC") \ 639 \ 640 manageable(bool, HeapDumpAfterFullGC, false, \ 641 "Dump heap to file after any major stop-the-world GC") \ 642 \ 643 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 644 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 645 \ 646 manageable(ccstr, HeapDumpPath, NULL, \ 647 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 648 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 649 "in the working directory)") \ 650 \ 651 develop(bool, BreakAtWarning, false, \ 652 "Execute breakpoint upon encountering VM warning") \ 653 \ 654 develop(bool, UseFakeTimers, false, \ 655 "Tell whether the VM should use system time or a fake timer") \ 656 \ 657 product(ccstr, NativeMemoryTracking, "off", \ 658 "Native memory tracking options") \ 659 \ 660 diagnostic(bool, PrintNMTStatistics, false, \ 661 "Print native memory tracking summary data if it is on") \ 662 \ 663 diagnostic(bool, LogCompilation, false, \ 664 "Log compilation activity in detail to LogFile") \ 665 \ 666 product(bool, PrintCompilation, false, \ 667 "Print compilations") \ 668 \ 669 product(bool, PrintExtendedThreadInfo, false, \ 670 "Print more information in thread dump") \ 671 \ 672 diagnostic(bool, TraceNMethodInstalls, false, \ 673 "Trace nmethod installation") \ 674 \ 675 diagnostic(intx, ScavengeRootsInCode, 2, \ 676 "0: do not allow scavengable oops in the code cache; " \ 677 "1: allow scavenging from the code cache; " \ 678 "2: emit as many constants as the compiler can see") \ 679 range(0, 2) \ 680 \ 681 product(bool, AlwaysRestoreFPU, false, \ 682 "Restore the FPU control word after every JNI call (expensive)") \ 683 \ 684 diagnostic(bool, PrintCompilation2, false, \ 685 "Print additional statistics per compilation") \ 686 \ 687 diagnostic(bool, PrintAdapterHandlers, false, \ 688 "Print code generated for i2c/c2i adapters") \ 689 \ 690 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 691 "Verify that i2c/c2i adapters are called properly") \ 692 \ 693 develop(bool, VerifyAdapterSharing, false, \ 694 "Verify that the code for shared adapters is the equivalent") \ 695 \ 696 diagnostic(bool, PrintAssembly, false, \ 697 "Print assembly code (using external disassembler.so)") \ 698 \ 699 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 700 "Print options string passed to disassembler.so") \ 701 \ 702 notproduct(bool, PrintNMethodStatistics, false, \ 703 "Print a summary statistic for the generated nmethods") \ 704 \ 705 diagnostic(bool, PrintNMethods, false, \ 706 "Print assembly code for nmethods when generated") \ 707 \ 708 diagnostic(bool, PrintNativeNMethods, false, \ 709 "Print assembly code for native nmethods when generated") \ 710 \ 711 develop(bool, PrintDebugInfo, false, \ 712 "Print debug information for all nmethods when generated") \ 713 \ 714 develop(bool, PrintRelocations, false, \ 715 "Print relocation information for all nmethods when generated") \ 716 \ 717 develop(bool, PrintDependencies, false, \ 718 "Print dependency information for all nmethods when generated") \ 719 \ 720 develop(bool, PrintExceptionHandlers, false, \ 721 "Print exception handler tables for all nmethods when generated") \ 722 \ 723 develop(bool, StressCompiledExceptionHandlers, false, \ 724 "Exercise compiled exception handlers") \ 725 \ 726 develop(bool, InterceptOSException, false, \ 727 "Start debugger when an implicit OS (e.g. NULL) " \ 728 "exception happens") \ 729 \ 730 product(bool, PrintCodeCache, false, \ 731 "Print the code cache memory usage when exiting") \ 732 \ 733 develop(bool, PrintCodeCache2, false, \ 734 "Print detailed usage information on the code cache when exiting")\ 735 \ 736 product(bool, PrintCodeCacheOnCompilation, false, \ 737 "Print the code cache memory usage each time a method is " \ 738 "compiled") \ 739 \ 740 diagnostic(bool, PrintCodeHeapAnalytics, false, \ 741 "Print code heap usage statistics on exit and on full condition") \ 742 \ 743 diagnostic(bool, PrintStubCode, false, \ 744 "Print generated stub code") \ 745 \ 746 product(bool, StackTraceInThrowable, true, \ 747 "Collect backtrace in throwable when exception happens") \ 748 \ 749 product(bool, OmitStackTraceInFastThrow, true, \ 750 "Omit backtraces for some 'hot' exceptions in optimized code") \ 751 \ 752 product(bool, ProfilerPrintByteCodeStatistics, false, \ 753 "Print bytecode statistics when dumping profiler output") \ 754 \ 755 product(bool, ProfilerRecordPC, false, \ 756 "Collect ticks for each 16 byte interval of compiled code") \ 757 \ 758 product(bool, ProfileVM, false, \ 759 "Profile ticks that fall within VM (either in the VM Thread " \ 760 "or VM code called through stubs)") \ 761 \ 762 product(bool, ProfileIntervals, false, \ 763 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 764 \ 765 notproduct(bool, ProfilerCheckIntervals, false, \ 766 "Collect and print information on spacing of profiler ticks") \ 767 \ 768 product(bool, PrintWarnings, true, \ 769 "Print JVM warnings to output stream") \ 770 \ 771 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 772 "Print warnings for stalled SpinLocks") \ 773 \ 774 product(bool, RegisterFinalizersAtInit, true, \ 775 "Register finalizable objects at end of Object.<init> or " \ 776 "after allocation") \ 777 \ 778 develop(bool, RegisterReferences, true, \ 779 "Tell whether the VM should register soft/weak/final/phantom " \ 780 "references") \ 781 \ 782 develop(bool, IgnoreRewrites, false, \ 783 "Suppress rewrites of bytecodes in the oopmap generator. " \ 784 "This is unsafe!") \ 785 \ 786 develop(bool, PrintCodeCacheExtension, false, \ 787 "Print extension of code cache") \ 788 \ 789 develop(bool, UsePrivilegedStack, true, \ 790 "Enable the security JVM functions") \ 791 \ 792 develop(bool, ProtectionDomainVerification, true, \ 793 "Verify protection domain before resolution in system dictionary")\ 794 \ 795 product(bool, ClassUnloading, true, \ 796 "Do unloading of classes") \ 797 \ 798 product(bool, ClassUnloadingWithConcurrentMark, true, \ 799 "Do unloading of classes with a concurrent marking cycle") \ 800 \ 801 develop(bool, DisableStartThread, false, \ 802 "Disable starting of additional Java threads " \ 803 "(for debugging only)") \ 804 \ 805 develop(bool, MemProfiling, false, \ 806 "Write memory usage profiling to log file") \ 807 \ 808 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 809 "Print the system dictionary at exit") \ 810 \ 811 diagnostic(bool, DynamicallyResizeSystemDictionaries, true, \ 812 "Dynamically resize system dictionaries as needed") \ 813 \ 814 product(bool, AlwaysLockClassLoader, false, \ 815 "Require the VM to acquire the class loader lock before calling " \ 816 "loadClass() even for class loaders registering " \ 817 "as parallel capable") \ 818 \ 819 product(bool, AllowParallelDefineClass, false, \ 820 "Allow parallel defineClass requests for class loaders " \ 821 "registering as parallel capable") \ 822 \ 823 product_pd(bool, DontYieldALot, \ 824 "Throw away obvious excess yield calls") \ 825 \ 826 develop(bool, UseDetachedThreads, true, \ 827 "Use detached threads that are recycled upon termination " \ 828 "(for Solaris only)") \ 829 \ 830 experimental(bool, DisablePrimordialThreadGuardPages, false, \ 831 "Disable the use of stack guard pages if the JVM is loaded " \ 832 "on the primordial process thread") \ 833 \ 834 product(bool, UseLWPSynchronization, true, \ 835 "Use LWP-based instead of libthread-based synchronization " \ 836 "(SPARC only)") \ 837 \ 838 product(intx, MonitorBound, 0, "Bound Monitor population") \ 839 range(0, max_jint) \ 840 \ 841 experimental(intx, MonitorUsedDeflationThreshold, 90, \ 842 "Percentage of used monitors before triggering cleanup " \ 843 "safepoint which deflates monitors (0 is off). " \ 844 "The check is performed on GuaranteedSafepointInterval.") \ 845 range(0, 100) \ 846 \ 847 experimental(intx, hashCode, 5, \ 848 "(Unstable) select hashCode generation algorithm") \ 849 \ 850 product(bool, FilterSpuriousWakeups, true, \ 851 "When true prevents OS-level spurious, or premature, wakeups " \ 852 "from Object.wait (Ignored for Windows)") \ 853 \ 854 develop(bool, UsePthreads, false, \ 855 "Use pthread-based instead of libthread-based synchronization " \ 856 "(SPARC only)") \ 857 \ 858 product(bool, ReduceSignalUsage, false, \ 859 "Reduce the use of OS signals in Java and/or the VM") \ 860 \ 861 develop_pd(bool, ShareVtableStubs, \ 862 "Share vtable stubs (smaller code but worse branch prediction") \ 863 \ 864 develop(bool, LoadLineNumberTables, true, \ 865 "Tell whether the class file parser loads line number tables") \ 866 \ 867 develop(bool, LoadLocalVariableTables, true, \ 868 "Tell whether the class file parser loads local variable tables") \ 869 \ 870 develop(bool, LoadLocalVariableTypeTables, true, \ 871 "Tell whether the class file parser loads local variable type" \ 872 "tables") \ 873 \ 874 product(bool, AllowUserSignalHandlers, false, \ 875 "Do not complain if the application installs signal handlers " \ 876 "(Solaris & Linux only)") \ 877 \ 878 product(bool, UseSignalChaining, true, \ 879 "Use signal-chaining to invoke signal handlers installed " \ 880 "by the application (Solaris & Linux only)") \ 881 \ 882 product(bool, AllowJNIEnvProxy, false, \ 883 "Allow JNIEnv proxies for jdbx") \ 884 \ 885 product(bool, RestoreMXCSROnJNICalls, false, \ 886 "Restore MXCSR when returning from JNI calls") \ 887 \ 888 product(bool, CheckJNICalls, false, \ 889 "Verify all arguments to JNI calls") \ 890 \ 891 product(bool, UseFastJNIAccessors, true, \ 892 "Use optimized versions of Get<Primitive>Field") \ 893 \ 894 product(intx, MaxJNILocalCapacity, 65536, \ 895 "Maximum allowable local JNI handle capacity to " \ 896 "EnsureLocalCapacity() and PushLocalFrame(), " \ 897 "where <= 0 is unlimited, default: 65536") \ 898 range(min_intx, max_intx) \ 899 \ 900 product(bool, EagerXrunInit, false, \ 901 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 902 "but not all -Xrun libraries may support the state of the VM " \ 903 "at this time") \ 904 \ 905 product(bool, PreserveAllAnnotations, false, \ 906 "Preserve RuntimeInvisibleAnnotations as well " \ 907 "as RuntimeVisibleAnnotations") \ 908 \ 909 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 910 "Number of OutOfMemoryErrors preallocated with backtrace") \ 911 \ 912 product(bool, UseXMMForArrayCopy, false, \ 913 "Use SSE2 MOVQ instruction for Arraycopy") \ 914 \ 915 product(intx, FieldsAllocationStyle, 1, \ 916 "0 - type based with oops first, " \ 917 "1 - with oops last, " \ 918 "2 - oops in super and sub classes are together") \ 919 range(0, 2) \ 920 \ 921 product(bool, CompactFields, true, \ 922 "Allocate nonstatic fields in gaps between previous fields") \ 923 \ 924 notproduct(bool, PrintFieldLayout, false, \ 925 "Print field layout for each class") \ 926 \ 927 notproduct(bool, PrintValueLayout, false, \ 928 "Print field layout for each value type") \ 929 \ 930 notproduct(bool, PrintValueArrayLayout, false, \ 931 "Print array layout for each value type array") \ 932 \ 933 product(bool, ValueArrayFlatten, true, \ 934 "Flatten value array elements, if possible") \ 935 \ 936 product(intx, ValueArrayElemMaxFlatSize, -1, \ 937 "Max size for flattening value array elements, <0 no limit") \ 938 \ 939 product(intx, ValueFieldMaxFlatSize, 128, \ 940 "Max size for flattening value type fields, <0 no limit") \ 941 \ 942 product(intx, ValueArrayElemMaxFlatOops, 4, \ 943 "Max nof embedded object references in a value type to flatten, <0 no limit") \ 944 \ 945 product(bool, ValueArrayAtomicAccess, false, \ 946 "Atomic value array accesses by-default, for all value arrays") \ 947 \ 948 /* Need to limit the extent of the padding to reasonable size. */\ 949 /* 8K is well beyond the reasonable HW cache line size, even with */\ 950 /* aggressive prefetching, while still leaving the room for segregating */\ 951 /* among the distinct pages. */\ 952 product(intx, ContendedPaddingWidth, 128, \ 953 "How many bytes to pad the fields/classes marked @Contended with")\ 954 range(0, 8192) \ 955 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 956 \ 957 product(bool, EnableContended, true, \ 958 "Enable @Contended annotation support") \ 959 \ 960 product(bool, RestrictContended, true, \ 961 "Restrict @Contended to trusted classes") \ 962 \ 963 product(bool, UseBiasedLocking, true, \ 964 "Enable biased locking in JVM") \ 965 \ 966 product(intx, BiasedLockingStartupDelay, 0, \ 967 "Number of milliseconds to wait before enabling biased locking") \ 968 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 969 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 970 \ 971 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 972 "Print statistics of biased locking in JVM") \ 973 \ 974 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 975 "Threshold of number of revocations per type to try to " \ 976 "rebias all objects in the heap of that type") \ 977 range(0, max_intx) \ 978 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 979 \ 980 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 981 "Threshold of number of revocations per type to permanently " \ 982 "revoke biases of all objects in the heap of that type") \ 983 range(0, max_intx) \ 984 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 985 \ 986 product(intx, BiasedLockingDecayTime, 25000, \ 987 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 988 "type after previous bulk rebias") \ 989 range(500, max_intx) \ 990 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 991 \ 992 product(bool, ExitOnOutOfMemoryError, false, \ 993 "JVM exits on the first occurrence of an out-of-memory error") \ 994 \ 995 product(bool, CrashOnOutOfMemoryError, false, \ 996 "JVM aborts, producing an error log and core/mini dump, on the " \ 997 "first occurrence of an out-of-memory error") \ 998 \ 999 /* tracing */ \ 1000 \ 1001 develop(bool, StressRewriter, false, \ 1002 "Stress linktime bytecode rewriting") \ 1003 \ 1004 product(ccstr, TraceJVMTI, NULL, \ 1005 "Trace flags for JVMTI functions and events") \ 1006 \ 1007 /* This option can change an EMCP method into an obsolete method. */ \ 1008 /* This can affect tests that except specific methods to be EMCP. */ \ 1009 /* This option should be used with caution. */ \ 1010 product(bool, StressLdcRewrite, false, \ 1011 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1012 \ 1013 /* change to false by default sometime after Mustang */ \ 1014 product(bool, VerifyMergedCPBytecodes, true, \ 1015 "Verify bytecodes after RedefineClasses constant pool merging") \ 1016 \ 1017 develop(bool, TraceBytecodes, false, \ 1018 "Trace bytecode execution") \ 1019 \ 1020 develop(bool, TraceICs, false, \ 1021 "Trace inline cache changes") \ 1022 \ 1023 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1024 "Trace method invocation counter overflow") \ 1025 \ 1026 develop(bool, TraceInlineCacheClearing, false, \ 1027 "Trace clearing of inline caches in nmethods") \ 1028 \ 1029 develop(bool, TraceDependencies, false, \ 1030 "Trace dependencies") \ 1031 \ 1032 develop(bool, VerifyDependencies, trueInDebug, \ 1033 "Exercise and verify the compilation dependency mechanism") \ 1034 \ 1035 develop(bool, TraceNewOopMapGeneration, false, \ 1036 "Trace OopMapGeneration") \ 1037 \ 1038 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1039 "Trace OopMapGeneration: print detailed cell states") \ 1040 \ 1041 develop(bool, TimeOopMap, false, \ 1042 "Time calls to GenerateOopMap::compute_map() in sum") \ 1043 \ 1044 develop(bool, TimeOopMap2, false, \ 1045 "Time calls to GenerateOopMap::compute_map() individually") \ 1046 \ 1047 develop(bool, TraceOopMapRewrites, false, \ 1048 "Trace rewriting of method oops during oop map generation") \ 1049 \ 1050 develop(bool, TraceICBuffer, false, \ 1051 "Trace usage of IC buffer") \ 1052 \ 1053 develop(bool, TraceCompiledIC, false, \ 1054 "Trace changes of compiled IC") \ 1055 \ 1056 develop(bool, FLSVerifyDictionary, false, \ 1057 "Do lots of (expensive) FLS dictionary verification") \ 1058 \ 1059 \ 1060 notproduct(bool, CheckMemoryInitialization, false, \ 1061 "Check memory initialization") \ 1062 \ 1063 product(uintx, ProcessDistributionStride, 4, \ 1064 "Stride through processors when distributing processes") \ 1065 range(0, max_juint) \ 1066 \ 1067 develop(bool, TraceFinalizerRegistration, false, \ 1068 "Trace registration of final references") \ 1069 \ 1070 product(bool, IgnoreEmptyClassPaths, false, \ 1071 "Ignore empty path elements in -classpath") \ 1072 \ 1073 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 1074 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 1075 "Initial size of the boot class loader data metaspace") \ 1076 range(30*K, max_uintx/BytesPerWord) \ 1077 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 1078 \ 1079 product(bool, PrintHeapAtSIGBREAK, true, \ 1080 "Print heap layout in response to SIGBREAK") \ 1081 \ 1082 manageable(bool, PrintClassHistogram, false, \ 1083 "Print a histogram of class instances") \ 1084 \ 1085 experimental(double, ObjectCountCutOffPercent, 0.5, \ 1086 "The percentage of the used heap that the instances of a class " \ 1087 "must occupy for the class to generate a trace event") \ 1088 range(0.0, 100.0) \ 1089 \ 1090 /* JVMTI heap profiling */ \ 1091 \ 1092 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 1093 "Trace JVMTI object tagging calls") \ 1094 \ 1095 diagnostic(bool, VerifyBeforeIteration, false, \ 1096 "Verify memory system before JVMTI iteration") \ 1097 \ 1098 /* compiler interface */ \ 1099 \ 1100 develop(bool, CIPrintCompilerName, false, \ 1101 "when CIPrint is active, print the name of the active compiler") \ 1102 \ 1103 diagnostic(bool, CIPrintCompileQueue, false, \ 1104 "display the contents of the compile queue whenever a " \ 1105 "compilation is enqueued") \ 1106 \ 1107 develop(bool, CIPrintRequests, false, \ 1108 "display every request for compilation") \ 1109 \ 1110 product(bool, CITime, false, \ 1111 "collect timing information for compilation") \ 1112 \ 1113 develop(bool, CITimeVerbose, false, \ 1114 "be more verbose in compilation timings") \ 1115 \ 1116 develop(bool, CITimeEach, false, \ 1117 "display timing information after each successful compilation") \ 1118 \ 1119 develop(bool, CICountOSR, false, \ 1120 "use a separate counter when assigning ids to osr compilations") \ 1121 \ 1122 develop(bool, CICompileNatives, true, \ 1123 "compile native methods if supported by the compiler") \ 1124 \ 1125 develop_pd(bool, CICompileOSR, \ 1126 "compile on stack replacement methods if supported by the " \ 1127 "compiler") \ 1128 \ 1129 develop(bool, CIPrintMethodCodes, false, \ 1130 "print method bytecodes of the compiled code") \ 1131 \ 1132 develop(bool, CIPrintTypeFlow, false, \ 1133 "print the results of ciTypeFlow analysis") \ 1134 \ 1135 develop(bool, CITraceTypeFlow, false, \ 1136 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 1137 \ 1138 develop(intx, OSROnlyBCI, -1, \ 1139 "OSR only at this bci. Negative values mean exclude that bci") \ 1140 \ 1141 /* compiler */ \ 1142 \ 1143 /* notice: the max range value here is max_jint, not max_intx */ \ 1144 /* because of overflow issue */ \ 1145 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 1146 "Number of compiler threads to run") \ 1147 range(0, max_jint) \ 1148 constraint(CICompilerCountConstraintFunc, AfterErgo) \ 1149 \ 1150 product(bool, UseDynamicNumberOfCompilerThreads, true, \ 1151 "Dynamically choose the number of parallel compiler threads") \ 1152 \ 1153 diagnostic(bool, ReduceNumberOfCompilerThreads, true, \ 1154 "Reduce the number of parallel compiler threads when they " \ 1155 "are not used") \ 1156 \ 1157 diagnostic(bool, TraceCompilerThreads, false, \ 1158 "Trace creation and removal of compiler threads") \ 1159 \ 1160 develop(bool, InjectCompilerCreationFailure, false, \ 1161 "Inject thread creation failures for " \ 1162 "UseDynamicNumberOfCompilerThreads") \ 1163 \ 1164 product(intx, CompilationPolicyChoice, 0, \ 1165 "which compilation policy (0-2)") \ 1166 range(0, 2) \ 1167 \ 1168 develop(bool, UseStackBanging, true, \ 1169 "use stack banging for stack overflow checks (required for " \ 1170 "proper StackOverflow handling; disable only to measure cost " \ 1171 "of stackbanging)") \ 1172 \ 1173 develop(bool, UseStrictFP, true, \ 1174 "use strict fp if modifier strictfp is set") \ 1175 \ 1176 develop(bool, GenerateSynchronizationCode, true, \ 1177 "generate locking/unlocking code for synchronized methods and " \ 1178 "monitors") \ 1179 \ 1180 develop(bool, GenerateRangeChecks, true, \ 1181 "Generate range checks for array accesses") \ 1182 \ 1183 diagnostic_pd(bool, ImplicitNullChecks, \ 1184 "Generate code for implicit null checks") \ 1185 \ 1186 product_pd(bool, TrapBasedNullChecks, \ 1187 "Generate code for null checks that uses a cmp and trap " \ 1188 "instruction raising SIGTRAP. This is only used if an access to" \ 1189 "null (+offset) will not raise a SIGSEGV, i.e.," \ 1190 "ImplicitNullChecks don't work (PPC64).") \ 1191 \ 1192 diagnostic(bool, EnableThreadSMRExtraValidityChecks, true, \ 1193 "Enable Thread SMR extra validity checks") \ 1194 \ 1195 diagnostic(bool, EnableThreadSMRStatistics, trueInDebug, \ 1196 "Enable Thread SMR Statistics") \ 1197 \ 1198 product(bool, Inline, true, \ 1199 "Enable inlining") \ 1200 \ 1201 product(bool, ClipInlining, true, \ 1202 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 1203 \ 1204 develop(bool, UseCHA, true, \ 1205 "Enable CHA") \ 1206 \ 1207 product(bool, UseTypeProfile, true, \ 1208 "Check interpreter profile for historically monomorphic calls") \ 1209 \ 1210 diagnostic(bool, PrintInlining, false, \ 1211 "Print inlining optimizations") \ 1212 \ 1213 product(bool, UsePopCountInstruction, false, \ 1214 "Use population count instruction") \ 1215 \ 1216 develop(bool, EagerInitialization, false, \ 1217 "Eagerly initialize classes if possible") \ 1218 \ 1219 diagnostic(bool, LogTouchedMethods, false, \ 1220 "Log methods which have been ever touched in runtime") \ 1221 \ 1222 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 1223 "Print all methods that have been ever touched in runtime") \ 1224 \ 1225 develop(bool, TraceMethodReplacement, false, \ 1226 "Print when methods are replaced do to recompilation") \ 1227 \ 1228 develop(bool, PrintMethodFlushing, false, \ 1229 "Print the nmethods being flushed") \ 1230 \ 1231 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 1232 "print statistics about method flushing") \ 1233 \ 1234 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 1235 "Number of compiled code invocations after which " \ 1236 "the method is considered as hot by the flusher") \ 1237 range(1, max_jint) \ 1238 \ 1239 diagnostic(intx, MinPassesBeforeFlush, 10, \ 1240 "Minimum number of sweeper passes before an nmethod " \ 1241 "can be flushed") \ 1242 range(0, max_intx) \ 1243 \ 1244 product(bool, UseCodeAging, true, \ 1245 "Insert counter to detect warm methods") \ 1246 \ 1247 diagnostic(bool, StressCodeAging, false, \ 1248 "Start with counters compiled in") \ 1249 \ 1250 develop(bool, StressCodeBuffers, false, \ 1251 "Exercise code buffer expansion and other rare state changes") \ 1252 \ 1253 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 1254 "Generate extra debugging information for non-safepoints in " \ 1255 "nmethods") \ 1256 \ 1257 product(bool, PrintVMOptions, false, \ 1258 "Print flags that appeared on the command line") \ 1259 \ 1260 product(bool, IgnoreUnrecognizedVMOptions, false, \ 1261 "Ignore unrecognized VM options") \ 1262 \ 1263 product(bool, PrintCommandLineFlags, false, \ 1264 "Print flags specified on command line or set by ergonomics") \ 1265 \ 1266 product(bool, PrintFlagsInitial, false, \ 1267 "Print all VM flags before argument processing and exit VM") \ 1268 \ 1269 product(bool, PrintFlagsFinal, false, \ 1270 "Print all VM flags after argument and ergonomic processing") \ 1271 \ 1272 notproduct(bool, PrintFlagsWithComments, false, \ 1273 "Print all VM flags with default values and descriptions and " \ 1274 "exit") \ 1275 \ 1276 product(bool, PrintFlagsRanges, false, \ 1277 "Print VM flags and their ranges and exit VM") \ 1278 \ 1279 diagnostic(bool, SerializeVMOutput, true, \ 1280 "Use a mutex to serialize output to tty and LogFile") \ 1281 \ 1282 diagnostic(bool, DisplayVMOutput, true, \ 1283 "Display all VM output on the tty, independently of LogVMOutput") \ 1284 \ 1285 diagnostic(bool, LogVMOutput, false, \ 1286 "Save VM output to LogFile") \ 1287 \ 1288 diagnostic(ccstr, LogFile, NULL, \ 1289 "If LogVMOutput or LogCompilation is on, save VM output to " \ 1290 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 1291 \ 1292 product(ccstr, ErrorFile, NULL, \ 1293 "If an error occurs, save the error data to this file " \ 1294 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 1295 \ 1296 product(bool, ExtensiveErrorReports, \ 1297 PRODUCT_ONLY(false) NOT_PRODUCT(true), \ 1298 "Error reports are more extensive.") \ 1299 \ 1300 product(bool, DisplayVMOutputToStderr, false, \ 1301 "If DisplayVMOutput is true, display all VM output to stderr") \ 1302 \ 1303 product(bool, DisplayVMOutputToStdout, false, \ 1304 "If DisplayVMOutput is true, display all VM output to stdout") \ 1305 \ 1306 product(bool, UseHeavyMonitors, false, \ 1307 "use heavyweight instead of lightweight Java monitors") \ 1308 \ 1309 product(bool, PrintStringTableStatistics, false, \ 1310 "print statistics about the StringTable and SymbolTable") \ 1311 \ 1312 diagnostic(bool, VerifyStringTableAtExit, false, \ 1313 "verify StringTable contents at exit") \ 1314 \ 1315 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 1316 "print histogram of the symbol table") \ 1317 \ 1318 notproduct(bool, ExitVMOnVerifyError, false, \ 1319 "standard exit from VM if bytecode verify error " \ 1320 "(only in debug mode)") \ 1321 \ 1322 diagnostic(ccstr, AbortVMOnException, NULL, \ 1323 "Call fatal if this exception is thrown. Example: " \ 1324 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 1325 \ 1326 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 1327 "Call fatal if the exception pointed by AbortVMOnException " \ 1328 "has this message") \ 1329 \ 1330 develop(bool, DebugVtables, false, \ 1331 "add debugging code to vtable dispatch") \ 1332 \ 1333 notproduct(bool, PrintVtableStats, false, \ 1334 "print vtables stats at end of run") \ 1335 \ 1336 develop(bool, TraceCreateZombies, false, \ 1337 "trace creation of zombie nmethods") \ 1338 \ 1339 notproduct(bool, IgnoreLockingAssertions, false, \ 1340 "disable locking assertions (for speed)") \ 1341 \ 1342 product(bool, RangeCheckElimination, true, \ 1343 "Eliminate range checks") \ 1344 \ 1345 develop_pd(bool, UncommonNullCast, \ 1346 "track occurrences of null in casts; adjust compiler tactics") \ 1347 \ 1348 develop(bool, TypeProfileCasts, true, \ 1349 "treat casts like calls for purposes of type profiling") \ 1350 \ 1351 develop(bool, TraceLivenessGen, false, \ 1352 "Trace the generation of liveness analysis information") \ 1353 \ 1354 notproduct(bool, TraceLivenessQuery, false, \ 1355 "Trace queries of liveness analysis information") \ 1356 \ 1357 notproduct(bool, CollectIndexSetStatistics, false, \ 1358 "Collect information about IndexSets") \ 1359 \ 1360 develop(bool, UseLoopSafepoints, true, \ 1361 "Generate Safepoint nodes in every loop") \ 1362 \ 1363 develop(intx, FastAllocateSizeLimit, 128*K, \ 1364 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 1365 "Inline allocations larger than this in doublewords must go slow")\ 1366 \ 1367 product_pd(bool, CompactStrings, \ 1368 "Enable Strings to use single byte chars in backing store") \ 1369 \ 1370 product_pd(uintx, TypeProfileLevel, \ 1371 "=XYZ, with Z: Type profiling of arguments at call; " \ 1372 "Y: Type profiling of return value at call; " \ 1373 "X: Type profiling of parameters to methods; " \ 1374 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 1375 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 1376 \ 1377 product(intx, TypeProfileArgsLimit, 2, \ 1378 "max number of call arguments to consider for type profiling") \ 1379 range(0, 16) \ 1380 \ 1381 product(intx, TypeProfileParmsLimit, 2, \ 1382 "max number of incoming parameters to consider for type profiling"\ 1383 ", -1 for all") \ 1384 range(-1, 64) \ 1385 \ 1386 /* statistics */ \ 1387 develop(bool, CountCompiledCalls, false, \ 1388 "Count method invocations") \ 1389 \ 1390 notproduct(bool, CountRuntimeCalls, false, \ 1391 "Count VM runtime calls") \ 1392 \ 1393 develop(bool, CountJNICalls, false, \ 1394 "Count jni method invocations") \ 1395 \ 1396 notproduct(bool, CountJVMCalls, false, \ 1397 "Count jvm method invocations") \ 1398 \ 1399 notproduct(bool, CountRemovableExceptions, false, \ 1400 "Count exceptions that could be replaced by branches due to " \ 1401 "inlining") \ 1402 \ 1403 notproduct(bool, ICMissHistogram, false, \ 1404 "Produce histogram of IC misses") \ 1405 \ 1406 /* interpreter */ \ 1407 product_pd(bool, RewriteBytecodes, \ 1408 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 1409 \ 1410 product_pd(bool, RewriteFrequentPairs, \ 1411 "Rewrite frequently used bytecode pairs into a single bytecode") \ 1412 \ 1413 diagnostic(bool, PrintInterpreter, false, \ 1414 "Print the generated interpreter code") \ 1415 \ 1416 product(bool, UseInterpreter, true, \ 1417 "Use interpreter for non-compiled methods") \ 1418 \ 1419 develop(bool, UseFastSignatureHandlers, true, \ 1420 "Use fast signature handlers for native calls") \ 1421 \ 1422 product(bool, UseLoopCounter, true, \ 1423 "Increment invocation counter on backward branch") \ 1424 \ 1425 product_pd(bool, UseOnStackReplacement, \ 1426 "Use on stack replacement, calls runtime if invoc. counter " \ 1427 "overflows in loop") \ 1428 \ 1429 notproduct(bool, TraceOnStackReplacement, false, \ 1430 "Trace on stack replacement") \ 1431 \ 1432 product_pd(bool, PreferInterpreterNativeStubs, \ 1433 "Use always interpreter stubs for native methods invoked via " \ 1434 "interpreter") \ 1435 \ 1436 develop(bool, CountBytecodes, false, \ 1437 "Count number of bytecodes executed") \ 1438 \ 1439 develop(bool, PrintBytecodeHistogram, false, \ 1440 "Print histogram of the executed bytecodes") \ 1441 \ 1442 develop(bool, PrintBytecodePairHistogram, false, \ 1443 "Print histogram of the executed bytecode pairs") \ 1444 \ 1445 diagnostic(bool, PrintSignatureHandlers, false, \ 1446 "Print code generated for native method signature handlers") \ 1447 \ 1448 develop(bool, VerifyOops, false, \ 1449 "Do plausibility checks for oops") \ 1450 \ 1451 develop(bool, CheckUnhandledOops, false, \ 1452 "Check for unhandled oops in VM code") \ 1453 \ 1454 develop(bool, VerifyJNIFields, trueInDebug, \ 1455 "Verify jfieldIDs for instance fields") \ 1456 \ 1457 notproduct(bool, VerifyJNIEnvThread, false, \ 1458 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 1459 "from JNI") \ 1460 \ 1461 develop(bool, VerifyFPU, false, \ 1462 "Verify FPU state (check for NaN's, etc.)") \ 1463 \ 1464 develop(bool, VerifyThread, false, \ 1465 "Watch the thread register for corruption (SPARC only)") \ 1466 \ 1467 develop(bool, VerifyActivationFrameSize, false, \ 1468 "Verify that activation frame didn't become smaller than its " \ 1469 "minimal size") \ 1470 \ 1471 develop(bool, TraceFrequencyInlining, false, \ 1472 "Trace frequency based inlining") \ 1473 \ 1474 develop_pd(bool, InlineIntrinsics, \ 1475 "Inline intrinsics that can be statically resolved") \ 1476 \ 1477 product_pd(bool, ProfileInterpreter, \ 1478 "Profile at the bytecode level during interpretation") \ 1479 \ 1480 develop(bool, TraceProfileInterpreter, false, \ 1481 "Trace profiling at the bytecode level during interpretation. " \ 1482 "This outputs the profiling information collected to improve " \ 1483 "jit compilation.") \ 1484 \ 1485 develop_pd(bool, ProfileTraps, \ 1486 "Profile deoptimization traps at the bytecode level") \ 1487 \ 1488 product(intx, ProfileMaturityPercentage, 20, \ 1489 "number of method invocations/branches (expressed as % of " \ 1490 "CompileThreshold) before using the method's profile") \ 1491 range(0, 100) \ 1492 \ 1493 diagnostic(bool, PrintMethodData, false, \ 1494 "Print the results of +ProfileInterpreter at end of run") \ 1495 \ 1496 develop(bool, VerifyDataPointer, trueInDebug, \ 1497 "Verify the method data pointer during interpreter profiling") \ 1498 \ 1499 develop(bool, VerifyCompiledCode, false, \ 1500 "Include miscellaneous runtime verifications in nmethod code; " \ 1501 "default off because it disturbs nmethod size heuristics") \ 1502 \ 1503 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 1504 "Manually make GC thread crash then dump java stack trace; " \ 1505 "Test only") \ 1506 \ 1507 /* compilation */ \ 1508 product(bool, UseCompiler, true, \ 1509 "Use Just-In-Time compilation") \ 1510 \ 1511 product(bool, UseCounterDecay, true, \ 1512 "Adjust recompilation counters") \ 1513 \ 1514 develop(intx, CounterHalfLifeTime, 30, \ 1515 "Half-life time of invocation counters (in seconds)") \ 1516 \ 1517 develop(intx, CounterDecayMinIntervalLength, 500, \ 1518 "The minimum interval (in milliseconds) between invocation of " \ 1519 "CounterDecay") \ 1520 \ 1521 product(bool, AlwaysCompileLoopMethods, false, \ 1522 "When using recompilation, never interpret methods " \ 1523 "containing loops") \ 1524 \ 1525 product(bool, DontCompileHugeMethods, true, \ 1526 "Do not compile methods > HugeMethodLimit") \ 1527 \ 1528 /* Bytecode escape analysis estimation. */ \ 1529 product(bool, EstimateArgEscape, true, \ 1530 "Analyze bytecodes to estimate escape state of arguments") \ 1531 \ 1532 product(intx, BCEATraceLevel, 0, \ 1533 "How much tracing to do of bytecode escape analysis estimates " \ 1534 "(0-3)") \ 1535 range(0, 3) \ 1536 \ 1537 product(intx, MaxBCEAEstimateLevel, 5, \ 1538 "Maximum number of nested calls that are analyzed by BC EA") \ 1539 range(0, max_jint) \ 1540 \ 1541 product(intx, MaxBCEAEstimateSize, 150, \ 1542 "Maximum bytecode size of a method to be analyzed by BC EA") \ 1543 range(0, max_jint) \ 1544 \ 1545 product(intx, AllocatePrefetchStyle, 1, \ 1546 "0 = no prefetch, " \ 1547 "1 = generate prefetch instructions for each allocation, " \ 1548 "2 = use TLAB watermark to gate allocation prefetch, " \ 1549 "3 = generate one prefetch instruction per cache line") \ 1550 range(0, 3) \ 1551 \ 1552 product(intx, AllocatePrefetchDistance, -1, \ 1553 "Distance to prefetch ahead of allocation pointer. " \ 1554 "-1: use system-specific value (automatically determined") \ 1555 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 1556 \ 1557 product(intx, AllocatePrefetchLines, 3, \ 1558 "Number of lines to prefetch ahead of array allocation pointer") \ 1559 range(1, 64) \ 1560 \ 1561 product(intx, AllocateInstancePrefetchLines, 1, \ 1562 "Number of lines to prefetch ahead of instance allocation " \ 1563 "pointer") \ 1564 range(1, 64) \ 1565 \ 1566 product(intx, AllocatePrefetchStepSize, 16, \ 1567 "Step size in bytes of sequential prefetch instructions") \ 1568 range(1, 512) \ 1569 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 1570 \ 1571 product(intx, AllocatePrefetchInstr, 0, \ 1572 "Select instruction to prefetch ahead of allocation pointer") \ 1573 constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit) \ 1574 \ 1575 /* deoptimization */ \ 1576 develop(bool, TraceDeoptimization, false, \ 1577 "Trace deoptimization") \ 1578 \ 1579 develop(bool, PrintDeoptimizationDetails, false, \ 1580 "Print more information about deoptimization") \ 1581 \ 1582 develop(bool, DebugDeoptimization, false, \ 1583 "Tracing various information while debugging deoptimization") \ 1584 \ 1585 product(intx, SelfDestructTimer, 0, \ 1586 "Will cause VM to terminate after a given time (in minutes) " \ 1587 "(0 means off)") \ 1588 range(0, max_intx) \ 1589 \ 1590 product(intx, MaxJavaStackTraceDepth, 1024, \ 1591 "The maximum number of lines in the stack trace for Java " \ 1592 "exceptions (0 means all)") \ 1593 range(0, max_jint/2) \ 1594 \ 1595 /* notice: the max range value here is max_jint, not max_intx */ \ 1596 /* because of overflow issue */ \ 1597 diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 1598 "Guarantee a safepoint (at least) every so many milliseconds " \ 1599 "(0 means none)") \ 1600 range(0, max_jint) \ 1601 \ 1602 product(intx, SafepointTimeoutDelay, 10000, \ 1603 "Delay in milliseconds for option SafepointTimeout") \ 1604 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 1605 NOT_LP64(range(0, max_intx)) \ 1606 \ 1607 product(intx, NmethodSweepActivity, 10, \ 1608 "Removes cold nmethods from code cache if > 0. Higher values " \ 1609 "result in more aggressive sweeping") \ 1610 range(0, 2000) \ 1611 \ 1612 notproduct(bool, LogSweeper, false, \ 1613 "Keep a ring buffer of sweeper activity") \ 1614 \ 1615 notproduct(intx, SweeperLogEntries, 1024, \ 1616 "Number of records in the ring buffer of sweeper activity") \ 1617 \ 1618 notproduct(intx, MemProfilingInterval, 500, \ 1619 "Time between each invocation of the MemProfiler") \ 1620 \ 1621 develop(intx, MallocCatchPtr, -1, \ 1622 "Hit breakpoint when mallocing/freeing this pointer") \ 1623 \ 1624 notproduct(ccstrlist, SuppressErrorAt, "", \ 1625 "List of assertions (file:line) to muzzle") \ 1626 \ 1627 develop(intx, StackPrintLimit, 100, \ 1628 "number of stack frames to print in VM-level stack dump") \ 1629 \ 1630 notproduct(intx, MaxElementPrintSize, 256, \ 1631 "maximum number of elements to print") \ 1632 \ 1633 notproduct(intx, MaxSubklassPrintSize, 4, \ 1634 "maximum number of subklasses to print when printing klass") \ 1635 \ 1636 product(intx, MaxInlineLevel, 9, \ 1637 "maximum number of nested calls that are inlined") \ 1638 range(0, max_jint) \ 1639 \ 1640 product(intx, MaxRecursiveInlineLevel, 1, \ 1641 "maximum number of nested recursive calls that are inlined") \ 1642 range(0, max_jint) \ 1643 \ 1644 develop(intx, MaxForceInlineLevel, 100, \ 1645 "maximum number of nested calls that are forced for inlining " \ 1646 "(using CompileCommand or marked w/ @ForceInline)") \ 1647 range(0, max_jint) \ 1648 \ 1649 product_pd(intx, InlineSmallCode, \ 1650 "Only inline already compiled methods if their code size is " \ 1651 "less than this") \ 1652 range(0, max_jint) \ 1653 \ 1654 product(intx, MaxInlineSize, 35, \ 1655 "The maximum bytecode size of a method to be inlined") \ 1656 range(0, max_jint) \ 1657 \ 1658 product_pd(intx, FreqInlineSize, \ 1659 "The maximum bytecode size of a frequent method to be inlined") \ 1660 range(0, max_jint) \ 1661 \ 1662 product(intx, MaxTrivialSize, 6, \ 1663 "The maximum bytecode size of a trivial method to be inlined") \ 1664 range(0, max_jint) \ 1665 \ 1666 product(intx, MinInliningThreshold, 250, \ 1667 "The minimum invocation count a method needs to have to be " \ 1668 "inlined") \ 1669 range(0, max_jint) \ 1670 \ 1671 develop(intx, MethodHistogramCutoff, 100, \ 1672 "The cutoff value for method invocation histogram (+CountCalls)") \ 1673 \ 1674 diagnostic(intx, ProfilerNumberOfInterpretedMethods, 25, \ 1675 "Number of interpreted methods to show in profile") \ 1676 \ 1677 diagnostic(intx, ProfilerNumberOfCompiledMethods, 25, \ 1678 "Number of compiled methods to show in profile") \ 1679 \ 1680 diagnostic(intx, ProfilerNumberOfStubMethods, 25, \ 1681 "Number of stub methods to show in profile") \ 1682 \ 1683 diagnostic(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 1684 "Number of runtime stub nodes to show in profile") \ 1685 \ 1686 product(intx, ProfileIntervalsTicks, 100, \ 1687 "Number of ticks between printing of interval profile " \ 1688 "(+ProfileIntervals)") \ 1689 range(0, max_intx) \ 1690 \ 1691 develop(intx, DontYieldALotInterval, 10, \ 1692 "Interval between which yields will be dropped (milliseconds)") \ 1693 \ 1694 develop(intx, ProfilerPCTickThreshold, 15, \ 1695 "Number of ticks in a PC buckets to be a hotspot") \ 1696 \ 1697 notproduct(intx, DeoptimizeALotInterval, 5, \ 1698 "Number of exits until DeoptimizeALot kicks in") \ 1699 \ 1700 notproduct(intx, ZombieALotInterval, 5, \ 1701 "Number of exits until ZombieALot kicks in") \ 1702 \ 1703 diagnostic(uintx, MallocMaxTestWords, 0, \ 1704 "If non-zero, maximum number of words that malloc/realloc can " \ 1705 "allocate (for testing only)") \ 1706 range(0, max_uintx) \ 1707 \ 1708 product(intx, TypeProfileWidth, 2, \ 1709 "Number of receiver types to record in call/cast profile") \ 1710 range(0, 8) \ 1711 \ 1712 develop(intx, BciProfileWidth, 2, \ 1713 "Number of return bci's to record in ret profile") \ 1714 \ 1715 product(intx, PerMethodRecompilationCutoff, 400, \ 1716 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 1717 range(-1, max_intx) \ 1718 \ 1719 product(intx, PerBytecodeRecompilationCutoff, 200, \ 1720 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 1721 range(-1, max_intx) \ 1722 \ 1723 product(intx, PerMethodTrapLimit, 100, \ 1724 "Limit on traps (of one kind) in a method (includes inlines)") \ 1725 range(0, max_jint) \ 1726 \ 1727 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 1728 "Limit on speculative traps (of one kind) in a method " \ 1729 "(includes inlines)") \ 1730 range(0, max_jint) \ 1731 \ 1732 product(intx, PerBytecodeTrapLimit, 4, \ 1733 "Limit on traps (of one kind) at a particular BCI") \ 1734 range(0, max_jint) \ 1735 \ 1736 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 1737 "Extra method data trap entries for speculation") \ 1738 \ 1739 develop(intx, InlineFrequencyRatio, 20, \ 1740 "Ratio of call site execution to caller method invocation") \ 1741 range(0, max_jint) \ 1742 \ 1743 diagnostic_pd(intx, InlineFrequencyCount, \ 1744 "Count of call site execution necessary to trigger frequent " \ 1745 "inlining") \ 1746 range(0, max_jint) \ 1747 \ 1748 develop(intx, InlineThrowCount, 50, \ 1749 "Force inlining of interpreted methods that throw this often") \ 1750 range(0, max_jint) \ 1751 \ 1752 develop(intx, InlineThrowMaxSize, 200, \ 1753 "Force inlining of throwing methods smaller than this") \ 1754 range(0, max_jint) \ 1755 \ 1756 develop(intx, ProfilerNodeSize, 1024, \ 1757 "Size in K to allocate for the Profile Nodes of each thread") \ 1758 range(0, 1024) \ 1759 \ 1760 product_pd(size_t, MetaspaceSize, \ 1761 "Initial threshold (in bytes) at which a garbage collection " \ 1762 "is done to reduce Metaspace usage") \ 1763 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 1764 \ 1765 product(size_t, MaxMetaspaceSize, max_uintx, \ 1766 "Maximum size of Metaspaces (in bytes)") \ 1767 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 1768 \ 1769 product(size_t, CompressedClassSpaceSize, 1*G, \ 1770 "Maximum size of class area in Metaspace when compressed " \ 1771 "class pointers are used") \ 1772 range(1*M, 3*G) \ 1773 \ 1774 manageable(uintx, MinHeapFreeRatio, 40, \ 1775 "The minimum percentage of heap free after GC to avoid expansion."\ 1776 " For most GCs this applies to the old generation. In G1 and" \ 1777 " ParallelGC it applies to the whole heap.") \ 1778 range(0, 100) \ 1779 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 1780 \ 1781 manageable(uintx, MaxHeapFreeRatio, 70, \ 1782 "The maximum percentage of heap free after GC to avoid shrinking."\ 1783 " For most GCs this applies to the old generation. In G1 and" \ 1784 " ParallelGC it applies to the whole heap.") \ 1785 range(0, 100) \ 1786 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 1787 \ 1788 product(bool, ShrinkHeapInSteps, true, \ 1789 "When disabled, informs the GC to shrink the java heap directly" \ 1790 " to the target size at the next full GC rather than requiring" \ 1791 " smaller steps during multiple full GCs.") \ 1792 \ 1793 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 1794 "Number of milliseconds per MB of free space in the heap") \ 1795 range(0, max_intx) \ 1796 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 1797 \ 1798 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 1799 "The minimum change in heap space due to GC (in bytes)") \ 1800 range(0, max_uintx) \ 1801 \ 1802 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 1803 "The minimum expansion of Metaspace (in bytes)") \ 1804 range(0, max_uintx) \ 1805 \ 1806 product(uintx, MaxMetaspaceFreeRatio, 70, \ 1807 "The maximum percentage of Metaspace free after GC to avoid " \ 1808 "shrinking") \ 1809 range(0, 100) \ 1810 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 1811 \ 1812 product(uintx, MinMetaspaceFreeRatio, 40, \ 1813 "The minimum percentage of Metaspace free after GC to avoid " \ 1814 "expansion") \ 1815 range(0, 99) \ 1816 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 1817 \ 1818 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 1819 "The maximum expansion of Metaspace without full GC (in bytes)") \ 1820 range(0, max_uintx) \ 1821 \ 1822 /* stack parameters */ \ 1823 product_pd(intx, StackYellowPages, \ 1824 "Number of yellow zone (recoverable overflows) pages of size " \ 1825 "4KB. If pages are bigger yellow zone is aligned up.") \ 1826 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 1827 \ 1828 product_pd(intx, StackRedPages, \ 1829 "Number of red zone (unrecoverable overflows) pages of size " \ 1830 "4KB. If pages are bigger red zone is aligned up.") \ 1831 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 1832 \ 1833 product_pd(intx, StackReservedPages, \ 1834 "Number of reserved zone (reserved to annotated methods) pages" \ 1835 " of size 4KB. If pages are bigger reserved zone is aligned up.") \ 1836 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ 1837 \ 1838 product(bool, RestrictReservedStack, true, \ 1839 "Restrict @ReservedStackAccess to trusted classes") \ 1840 \ 1841 /* greater stack shadow pages can't generate instruction to bang stack */ \ 1842 product_pd(intx, StackShadowPages, \ 1843 "Number of shadow zone (for overflow checking) pages of size " \ 1844 "4KB. If pages are bigger shadow zone is aligned up. " \ 1845 "This should exceed the depth of the VM and native call stack.") \ 1846 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 1847 \ 1848 product_pd(intx, ThreadStackSize, \ 1849 "Thread Stack Size (in Kbytes)") \ 1850 range(0, 1 * M) \ 1851 \ 1852 product_pd(intx, VMThreadStackSize, \ 1853 "Non-Java Thread Stack Size (in Kbytes)") \ 1854 range(0, max_intx/(1 * K)) \ 1855 \ 1856 product_pd(intx, CompilerThreadStackSize, \ 1857 "Compiler Thread Stack Size (in Kbytes)") \ 1858 range(0, max_intx/(1 * K)) \ 1859 \ 1860 develop_pd(size_t, JVMInvokeMethodSlack, \ 1861 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 1862 \ 1863 /* code cache parameters */ \ 1864 develop_pd(uintx, CodeCacheSegmentSize, \ 1865 "Code cache segment size (in bytes) - smallest unit of " \ 1866 "allocation") \ 1867 range(1, 1024) \ 1868 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 1869 \ 1870 develop_pd(intx, CodeEntryAlignment, \ 1871 "Code entry alignment for generated code (in bytes)") \ 1872 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 1873 \ 1874 product_pd(intx, OptoLoopAlignment, \ 1875 "Align inner loops to zero relative to this modulus") \ 1876 range(1, 16) \ 1877 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 1878 \ 1879 product_pd(uintx, InitialCodeCacheSize, \ 1880 "Initial code cache size (in bytes)") \ 1881 range(os::vm_page_size(), max_uintx) \ 1882 \ 1883 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 1884 "Minimum code cache size (in bytes) required to start VM.") \ 1885 range(0, max_uintx) \ 1886 \ 1887 product(bool, SegmentedCodeCache, false, \ 1888 "Use a segmented code cache") \ 1889 \ 1890 product_pd(uintx, ReservedCodeCacheSize, \ 1891 "Reserved code cache size (in bytes) - maximum code cache size") \ 1892 range(os::vm_page_size(), max_uintx) \ 1893 \ 1894 product_pd(uintx, NonProfiledCodeHeapSize, \ 1895 "Size of code heap with non-profiled methods (in bytes)") \ 1896 range(0, max_uintx) \ 1897 \ 1898 product_pd(uintx, ProfiledCodeHeapSize, \ 1899 "Size of code heap with profiled methods (in bytes)") \ 1900 range(0, max_uintx) \ 1901 \ 1902 product_pd(uintx, NonNMethodCodeHeapSize, \ 1903 "Size of code heap with non-nmethods (in bytes)") \ 1904 range(os::vm_page_size(), max_uintx) \ 1905 \ 1906 product_pd(uintx, CodeCacheExpansionSize, \ 1907 "Code cache expansion size (in bytes)") \ 1908 range(32*K, max_uintx) \ 1909 \ 1910 diagnostic_pd(uintx, CodeCacheMinBlockLength, \ 1911 "Minimum number of segments in a code cache block") \ 1912 range(1, 100) \ 1913 \ 1914 notproduct(bool, ExitOnFullCodeCache, false, \ 1915 "Exit the VM if we fill the code cache") \ 1916 \ 1917 product(bool, UseCodeCacheFlushing, true, \ 1918 "Remove cold/old nmethods from the code cache") \ 1919 \ 1920 product(uintx, StartAggressiveSweepingAt, 10, \ 1921 "Start aggressive sweeping if X[%] of the code cache is free." \ 1922 "Segmented code cache: X[%] of the non-profiled heap." \ 1923 "Non-segmented code cache: X[%] of the total code cache") \ 1924 range(0, 100) \ 1925 \ 1926 /* AOT parameters */ \ 1927 product(bool, UseAOT, AOT_ONLY(true) NOT_AOT(false), \ 1928 "Use AOT compiled files") \ 1929 \ 1930 product(ccstrlist, AOTLibrary, NULL, \ 1931 "AOT library") \ 1932 \ 1933 product(bool, PrintAOT, false, \ 1934 "Print used AOT klasses and methods") \ 1935 \ 1936 notproduct(bool, PrintAOTStatistics, false, \ 1937 "Print AOT statistics") \ 1938 \ 1939 diagnostic(bool, UseAOTStrictLoading, false, \ 1940 "Exit the VM if any of the AOT libraries has invalid config") \ 1941 \ 1942 product(bool, CalculateClassFingerprint, false, \ 1943 "Calculate class fingerprint") \ 1944 \ 1945 /* interpreter debugging */ \ 1946 develop(intx, BinarySwitchThreshold, 5, \ 1947 "Minimal number of lookupswitch entries for rewriting to binary " \ 1948 "switch") \ 1949 \ 1950 develop(intx, StopInterpreterAt, 0, \ 1951 "Stop interpreter execution at specified bytecode number") \ 1952 \ 1953 develop(intx, TraceBytecodesAt, 0, \ 1954 "Trace bytecodes starting with specified bytecode number") \ 1955 \ 1956 /* compiler interface */ \ 1957 develop(intx, CIStart, 0, \ 1958 "The id of the first compilation to permit") \ 1959 \ 1960 develop(intx, CIStop, max_jint, \ 1961 "The id of the last compilation to permit") \ 1962 \ 1963 develop(intx, CIStartOSR, 0, \ 1964 "The id of the first osr compilation to permit " \ 1965 "(CICountOSR must be on)") \ 1966 \ 1967 develop(intx, CIStopOSR, max_jint, \ 1968 "The id of the last osr compilation to permit " \ 1969 "(CICountOSR must be on)") \ 1970 \ 1971 develop(intx, CIBreakAtOSR, -1, \ 1972 "The id of osr compilation to break at") \ 1973 \ 1974 develop(intx, CIBreakAt, -1, \ 1975 "The id of compilation to break at") \ 1976 \ 1977 product(ccstrlist, CompileOnly, "", \ 1978 "List of methods (pkg/class.name) to restrict compilation to") \ 1979 \ 1980 product(ccstr, CompileCommandFile, NULL, \ 1981 "Read compiler commands from this file [.hotspot_compiler]") \ 1982 \ 1983 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 1984 "Read compiler directives from this file") \ 1985 \ 1986 product(ccstrlist, CompileCommand, "", \ 1987 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 1988 \ 1989 develop(bool, ReplayCompiles, false, \ 1990 "Enable replay of compilations from ReplayDataFile") \ 1991 \ 1992 product(ccstr, ReplayDataFile, NULL, \ 1993 "File containing compilation replay information" \ 1994 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 1995 \ 1996 product(ccstr, InlineDataFile, NULL, \ 1997 "File containing inlining replay information" \ 1998 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 1999 \ 2000 develop(intx, ReplaySuppressInitializers, 2, \ 2001 "Control handling of class initialization during replay: " \ 2002 "0 - don't do anything special; " \ 2003 "1 - treat all class initializers as empty; " \ 2004 "2 - treat class initializers for application classes as empty; " \ 2005 "3 - allow all class initializers to run during bootstrap but " \ 2006 " pretend they are empty after starting replay") \ 2007 range(0, 3) \ 2008 \ 2009 develop(bool, ReplayIgnoreInitErrors, false, \ 2010 "Ignore exceptions thrown during initialization for replay") \ 2011 \ 2012 product(bool, DumpReplayDataOnError, true, \ 2013 "Record replay data for crashing compiler threads") \ 2014 \ 2015 product(bool, CICompilerCountPerCPU, false, \ 2016 "1 compiler thread for log(N CPUs)") \ 2017 \ 2018 develop(intx, CIFireOOMAt, -1, \ 2019 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 2020 "(non-negative value throws OOM after this many CI accesses " \ 2021 "in each compile)") \ 2022 notproduct(intx, CICrashAt, -1, \ 2023 "id of compilation to trigger assert in compiler thread for " \ 2024 "the purpose of testing, e.g. generation of replay data") \ 2025 notproduct(bool, CIObjectFactoryVerify, false, \ 2026 "enable potentially expensive verification in ciObjectFactory") \ 2027 \ 2028 diagnostic(bool, AbortVMOnCompilationFailure, false, \ 2029 "Abort VM when method had failed to compile.") \ 2030 \ 2031 /* Priorities */ \ 2032 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 2033 \ 2034 product(intx, ThreadPriorityPolicy, 0, \ 2035 "0 : Normal. "\ 2036 " VM chooses priorities that are appropriate for normal "\ 2037 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 2038 " to normal native priority. Java priorities below " \ 2039 " NORM_PRIORITY map to lower native priority values. On "\ 2040 " Windows applications are allowed to use higher native "\ 2041 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 2042 " not use the highest possible native priority, "\ 2043 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 2044 " system threads. On Linux thread priorities are ignored "\ 2045 " because the OS does not support static priority in "\ 2046 " SCHED_OTHER scheduling class which is the only choice for "\ 2047 " non-root, non-realtime applications. "\ 2048 "1 : Aggressive. "\ 2049 " Java thread priorities map over to the entire range of "\ 2050 " native thread priorities. Higher Java thread priorities map "\ 2051 " to higher native thread priorities. This policy should be "\ 2052 " used with care, as sometimes it can cause performance "\ 2053 " degradation in the application and/or the entire system. On "\ 2054 " Linux/BSD/macOS this policy requires root privilege or an "\ 2055 " extended capability.") \ 2056 range(0, 1) \ 2057 \ 2058 product(bool, ThreadPriorityVerbose, false, \ 2059 "Print priority changes") \ 2060 \ 2061 product(intx, CompilerThreadPriority, -1, \ 2062 "The native priority at which compiler threads should run " \ 2063 "(-1 means no change)") \ 2064 range(min_jint, max_jint) \ 2065 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 2066 \ 2067 product(intx, VMThreadPriority, -1, \ 2068 "The native priority at which the VM thread should run " \ 2069 "(-1 means no change)") \ 2070 range(-1, 127) \ 2071 \ 2072 product(intx, JavaPriority1_To_OSPriority, -1, \ 2073 "Map Java priorities to OS priorities") \ 2074 range(-1, 127) \ 2075 \ 2076 product(intx, JavaPriority2_To_OSPriority, -1, \ 2077 "Map Java priorities to OS priorities") \ 2078 range(-1, 127) \ 2079 \ 2080 product(intx, JavaPriority3_To_OSPriority, -1, \ 2081 "Map Java priorities to OS priorities") \ 2082 range(-1, 127) \ 2083 \ 2084 product(intx, JavaPriority4_To_OSPriority, -1, \ 2085 "Map Java priorities to OS priorities") \ 2086 range(-1, 127) \ 2087 \ 2088 product(intx, JavaPriority5_To_OSPriority, -1, \ 2089 "Map Java priorities to OS priorities") \ 2090 range(-1, 127) \ 2091 \ 2092 product(intx, JavaPriority6_To_OSPriority, -1, \ 2093 "Map Java priorities to OS priorities") \ 2094 range(-1, 127) \ 2095 \ 2096 product(intx, JavaPriority7_To_OSPriority, -1, \ 2097 "Map Java priorities to OS priorities") \ 2098 range(-1, 127) \ 2099 \ 2100 product(intx, JavaPriority8_To_OSPriority, -1, \ 2101 "Map Java priorities to OS priorities") \ 2102 range(-1, 127) \ 2103 \ 2104 product(intx, JavaPriority9_To_OSPriority, -1, \ 2105 "Map Java priorities to OS priorities") \ 2106 range(-1, 127) \ 2107 \ 2108 product(intx, JavaPriority10_To_OSPriority,-1, \ 2109 "Map Java priorities to OS priorities") \ 2110 range(-1, 127) \ 2111 \ 2112 experimental(bool, UseCriticalJavaThreadPriority, false, \ 2113 "Java thread priority 10 maps to critical scheduling priority") \ 2114 \ 2115 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 2116 "Compiler thread(s) run at critical scheduling priority") \ 2117 \ 2118 experimental(bool, UseCriticalCMSThreadPriority, false, \ 2119 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 2120 \ 2121 develop(intx, NewCodeParameter, 0, \ 2122 "Testing Only: Create a dedicated integer parameter before " \ 2123 "putback") \ 2124 \ 2125 /* new oopmap storage allocation */ \ 2126 develop(intx, MinOopMapAllocation, 8, \ 2127 "Minimum number of OopMap entries in an OopMapSet") \ 2128 \ 2129 /* Background Compilation */ \ 2130 develop(intx, LongCompileThreshold, 50, \ 2131 "Used with +TraceLongCompiles") \ 2132 \ 2133 /* recompilation */ \ 2134 product_pd(intx, CompileThreshold, \ 2135 "number of interpreted method invocations before (re-)compiling") \ 2136 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 2137 \ 2138 product(double, CompileThresholdScaling, 1.0, \ 2139 "Factor to control when first compilation happens " \ 2140 "(both with and without tiered compilation): " \ 2141 "values greater than 1.0 delay counter overflow, " \ 2142 "values between 0 and 1.0 rush counter overflow, " \ 2143 "value of 1.0 leaves compilation thresholds unchanged " \ 2144 "value of 0.0 is equivalent to -Xint. " \ 2145 "" \ 2146 "Flag can be set as per-method option. " \ 2147 "If a value is specified for a method, compilation thresholds " \ 2148 "for that method are scaled by both the value of the global flag "\ 2149 "and the value of the per-method flag.") \ 2150 range(0.0, DBL_MAX) \ 2151 \ 2152 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 2153 "Interpreter (tier 0) invocation notification frequency") \ 2154 range(0, 30) \ 2155 \ 2156 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 2157 "C1 without MDO (tier 2) invocation notification frequency") \ 2158 range(0, 30) \ 2159 \ 2160 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 2161 "C1 with MDO profiling (tier 3) invocation notification " \ 2162 "frequency") \ 2163 range(0, 30) \ 2164 \ 2165 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 2166 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 2167 range(0, 30) \ 2168 \ 2169 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 2170 "Interpreter (tier 0) invocation notification frequency") \ 2171 range(0, 30) \ 2172 \ 2173 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 2174 "C1 without MDO (tier 2) invocation notification frequency") \ 2175 range(0, 30) \ 2176 \ 2177 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 2178 "C1 with MDO profiling (tier 3) invocation notification " \ 2179 "frequency") \ 2180 range(0, 30) \ 2181 \ 2182 product(intx, Tier2CompileThreshold, 0, \ 2183 "threshold at which tier 2 compilation is invoked") \ 2184 range(0, max_jint) \ 2185 \ 2186 product(intx, Tier2BackEdgeThreshold, 0, \ 2187 "Back edge threshold at which tier 2 compilation is invoked") \ 2188 range(0, max_jint) \ 2189 \ 2190 product(intx, Tier3InvocationThreshold, 200, \ 2191 "Compile if number of method invocations crosses this " \ 2192 "threshold") \ 2193 range(0, max_jint) \ 2194 \ 2195 product(intx, Tier3MinInvocationThreshold, 100, \ 2196 "Minimum invocation to compile at tier 3") \ 2197 range(0, max_jint) \ 2198 \ 2199 product(intx, Tier3CompileThreshold, 2000, \ 2200 "Threshold at which tier 3 compilation is invoked (invocation " \ 2201 "minimum must be satisfied)") \ 2202 range(0, max_jint) \ 2203 \ 2204 product(intx, Tier3BackEdgeThreshold, 60000, \ 2205 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 2206 range(0, max_jint) \ 2207 \ 2208 product(intx, Tier3AOTInvocationThreshold, 10000, \ 2209 "Compile if number of method invocations crosses this " \ 2210 "threshold if coming from AOT") \ 2211 range(0, max_jint) \ 2212 \ 2213 product(intx, Tier3AOTMinInvocationThreshold, 1000, \ 2214 "Minimum invocation to compile at tier 3 if coming from AOT") \ 2215 range(0, max_jint) \ 2216 \ 2217 product(intx, Tier3AOTCompileThreshold, 15000, \ 2218 "Threshold at which tier 3 compilation is invoked (invocation " \ 2219 "minimum must be satisfied) if coming from AOT") \ 2220 range(0, max_jint) \ 2221 \ 2222 product(intx, Tier3AOTBackEdgeThreshold, 120000, \ 2223 "Back edge threshold at which tier 3 OSR compilation is invoked " \ 2224 "if coming from AOT") \ 2225 range(0, max_jint) \ 2226 \ 2227 product(intx, Tier4InvocationThreshold, 5000, \ 2228 "Compile if number of method invocations crosses this " \ 2229 "threshold") \ 2230 range(0, max_jint) \ 2231 \ 2232 product(intx, Tier4MinInvocationThreshold, 600, \ 2233 "Minimum invocation to compile at tier 4") \ 2234 range(0, max_jint) \ 2235 \ 2236 product(intx, Tier4CompileThreshold, 15000, \ 2237 "Threshold at which tier 4 compilation is invoked (invocation " \ 2238 "minimum must be satisfied") \ 2239 range(0, max_jint) \ 2240 \ 2241 product(intx, Tier4BackEdgeThreshold, 40000, \ 2242 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 2243 range(0, max_jint) \ 2244 \ 2245 product(intx, Tier3DelayOn, 5, \ 2246 "If C2 queue size grows over this amount per compiler thread " \ 2247 "stop compiling at tier 3 and start compiling at tier 2") \ 2248 range(0, max_jint) \ 2249 \ 2250 product(intx, Tier3DelayOff, 2, \ 2251 "If C2 queue size is less than this amount per compiler thread " \ 2252 "allow methods compiled at tier 2 transition to tier 3") \ 2253 range(0, max_jint) \ 2254 \ 2255 product(intx, Tier3LoadFeedback, 5, \ 2256 "Tier 3 thresholds will increase twofold when C1 queue size " \ 2257 "reaches this amount per compiler thread") \ 2258 range(0, max_jint) \ 2259 \ 2260 product(intx, Tier4LoadFeedback, 3, \ 2261 "Tier 4 thresholds will increase twofold when C2 queue size " \ 2262 "reaches this amount per compiler thread") \ 2263 range(0, max_jint) \ 2264 \ 2265 product(intx, TieredCompileTaskTimeout, 50, \ 2266 "Kill compile task if method was not used within " \ 2267 "given timeout in milliseconds") \ 2268 range(0, max_intx) \ 2269 \ 2270 product(intx, TieredStopAtLevel, 4, \ 2271 "Stop at given compilation level") \ 2272 range(0, 4) \ 2273 \ 2274 product(intx, Tier0ProfilingStartPercentage, 200, \ 2275 "Start profiling in interpreter if the counters exceed tier 3 " \ 2276 "thresholds by the specified percentage") \ 2277 range(0, max_jint) \ 2278 \ 2279 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 2280 "Increase the compile threshold for C1 compilation if the code " \ 2281 "cache is filled by the specified percentage") \ 2282 range(0, 99) \ 2283 \ 2284 product(intx, TieredRateUpdateMinTime, 1, \ 2285 "Minimum rate sampling interval (in milliseconds)") \ 2286 range(0, max_intx) \ 2287 \ 2288 product(intx, TieredRateUpdateMaxTime, 25, \ 2289 "Maximum rate sampling interval (in milliseconds)") \ 2290 range(0, max_intx) \ 2291 \ 2292 product_pd(bool, TieredCompilation, \ 2293 "Enable tiered compilation") \ 2294 \ 2295 product(bool, PrintTieredEvents, false, \ 2296 "Print tiered events notifications") \ 2297 \ 2298 product_pd(intx, OnStackReplacePercentage, \ 2299 "NON_TIERED number of method invocations/branches (expressed as " \ 2300 "% of CompileThreshold) before (re-)compiling OSR code") \ 2301 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 2302 \ 2303 product(intx, InterpreterProfilePercentage, 33, \ 2304 "NON_TIERED number of method invocations/branches (expressed as " \ 2305 "% of CompileThreshold) before profiling in the interpreter") \ 2306 range(0, 100) \ 2307 \ 2308 develop(intx, MaxRecompilationSearchLength, 10, \ 2309 "The maximum number of frames to inspect when searching for " \ 2310 "recompilee") \ 2311 \ 2312 develop(intx, MaxInterpretedSearchLength, 3, \ 2313 "The maximum number of interpreted frames to skip when searching "\ 2314 "for recompilee") \ 2315 \ 2316 develop(intx, DesiredMethodLimit, 8000, \ 2317 "The desired maximum method size (in bytecodes) after inlining") \ 2318 \ 2319 develop(intx, HugeMethodLimit, 8000, \ 2320 "Don't compile methods larger than this if " \ 2321 "+DontCompileHugeMethods") \ 2322 \ 2323 /* Properties for Java libraries */ \ 2324 \ 2325 product(uint64_t, MaxDirectMemorySize, 0, \ 2326 "Maximum total size of NIO direct-buffer allocations") \ 2327 range(0, max_jlong) \ 2328 \ 2329 /* Flags used for temporary code during development */ \ 2330 \ 2331 diagnostic(bool, UseNewCode, false, \ 2332 "Testing Only: Use the new version while testing") \ 2333 \ 2334 diagnostic(bool, UseNewCode2, false, \ 2335 "Testing Only: Use the new version while testing") \ 2336 \ 2337 diagnostic(bool, UseNewCode3, false, \ 2338 "Testing Only: Use the new version while testing") \ 2339 \ 2340 /* flags for performance data collection */ \ 2341 \ 2342 product(bool, UsePerfData, true, \ 2343 "Flag to disable jvmstat instrumentation for performance testing "\ 2344 "and problem isolation purposes") \ 2345 \ 2346 product(bool, PerfDataSaveToFile, false, \ 2347 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 2348 \ 2349 product(ccstr, PerfDataSaveFile, NULL, \ 2350 "Save PerfData memory to the specified absolute pathname. " \ 2351 "The string %p in the file name (if present) " \ 2352 "will be replaced by pid") \ 2353 \ 2354 product(intx, PerfDataSamplingInterval, 50, \ 2355 "Data sampling interval (in milliseconds)") \ 2356 range(PeriodicTask::min_interval, max_jint) \ 2357 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 2358 \ 2359 product(bool, PerfDisableSharedMem, false, \ 2360 "Store performance data in standard memory") \ 2361 \ 2362 product(intx, PerfDataMemorySize, 32*K, \ 2363 "Size of performance data memory region. Will be rounded " \ 2364 "up to a multiple of the native os page size.") \ 2365 range(128, 32*64*K) \ 2366 \ 2367 product(intx, PerfMaxStringConstLength, 1024, \ 2368 "Maximum PerfStringConstant string length before truncation") \ 2369 range(32, 32*K) \ 2370 \ 2371 product(bool, PerfAllowAtExitRegistration, false, \ 2372 "Allow registration of atexit() methods") \ 2373 \ 2374 product(bool, PerfBypassFileSystemCheck, false, \ 2375 "Bypass Win32 file system criteria checks (Windows Only)") \ 2376 \ 2377 product(intx, UnguardOnExecutionViolation, 0, \ 2378 "Unguard page and retry on no-execute fault (Win32 only) " \ 2379 "0=off, 1=conservative, 2=aggressive") \ 2380 range(0, 2) \ 2381 \ 2382 /* Serviceability Support */ \ 2383 \ 2384 product(bool, ManagementServer, false, \ 2385 "Create JMX Management Server") \ 2386 \ 2387 product(bool, DisableAttachMechanism, false, \ 2388 "Disable mechanism that allows tools to attach to this VM") \ 2389 \ 2390 product(bool, StartAttachListener, false, \ 2391 "Always start Attach Listener at VM startup") \ 2392 \ 2393 product(bool, EnableDynamicAgentLoading, true, \ 2394 "Allow tools to load agents with the attach mechanism") \ 2395 \ 2396 manageable(bool, PrintConcurrentLocks, false, \ 2397 "Print java.util.concurrent locks in thread dump") \ 2398 \ 2399 /* Shared spaces */ \ 2400 \ 2401 product(bool, UseSharedSpaces, true, \ 2402 "Use shared spaces for metadata") \ 2403 \ 2404 product(bool, VerifySharedSpaces, false, \ 2405 "Verify shared spaces (false for default archive, true for " \ 2406 "archive specified by -XX:SharedArchiveFile)") \ 2407 \ 2408 product(bool, RequireSharedSpaces, false, \ 2409 "Require shared spaces for metadata") \ 2410 \ 2411 product(bool, DumpSharedSpaces, false, \ 2412 "Special mode: JVM reads a class list, loads classes, builds " \ 2413 "shared spaces, and dumps the shared spaces to a file to be " \ 2414 "used in future JVM runs") \ 2415 \ 2416 product(bool, PrintSharedArchiveAndExit, false, \ 2417 "Print shared archive file contents") \ 2418 \ 2419 product(bool, PrintSharedDictionary, false, \ 2420 "If PrintSharedArchiveAndExit is true, also print the shared " \ 2421 "dictionary") \ 2422 \ 2423 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 2424 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 2425 "Address to allocate shared memory region for class data") \ 2426 range(0, SIZE_MAX) \ 2427 \ 2428 product(ccstr, SharedArchiveConfigFile, NULL, \ 2429 "Data to add to the CDS archive file") \ 2430 \ 2431 product(uintx, SharedSymbolTableBucketSize, 4, \ 2432 "Average number of symbols per bucket in shared table") \ 2433 range(2, 246) \ 2434 \ 2435 diagnostic(bool, AllowArchivingWithJavaAgent, false, \ 2436 "Allow Java agent to be run with CDS dumping") \ 2437 \ 2438 diagnostic(bool, PrintMethodHandleStubs, false, \ 2439 "Print generated stub code for method handles") \ 2440 \ 2441 develop(bool, TraceMethodHandles, false, \ 2442 "trace internal method handle operations") \ 2443 \ 2444 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 2445 "perform extra checks when constructing method handles") \ 2446 \ 2447 diagnostic(bool, ShowHiddenFrames, false, \ 2448 "show method handle implementation frames (usually hidden)") \ 2449 \ 2450 experimental(bool, TrustFinalNonStaticFields, false, \ 2451 "trust final non-static declarations for constant folding") \ 2452 \ 2453 diagnostic(bool, FoldStableValues, true, \ 2454 "Optimize loads from stable fields (marked w/ @Stable)") \ 2455 \ 2456 develop(bool, TraceInvokeDynamic, false, \ 2457 "trace internal invoke dynamic operations") \ 2458 \ 2459 diagnostic(int, UseBootstrapCallInfo, 1, \ 2460 "0: when resolving InDy or ConDy, force all BSM arguments to be " \ 2461 "resolved before the bootstrap method is called; 1: when a BSM " \ 2462 "that may accept a BootstrapCallInfo is detected, use that API " \ 2463 "to pass BSM arguments, which allows the BSM to delay their " \ 2464 "resolution; 2+: stress test the BCI API by calling more BSMs " \ 2465 "via that API, instead of with the eagerly-resolved array.") \ 2466 \ 2467 diagnostic(bool, PauseAtStartup, false, \ 2468 "Causes the VM to pause at startup time and wait for the pause " \ 2469 "file to be removed (default: ./vm.paused.<pid>)") \ 2470 \ 2471 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 2472 "The file to create and for whose removal to await when pausing " \ 2473 "at startup. (default: ./vm.paused.<pid>)") \ 2474 \ 2475 diagnostic(bool, PauseAtExit, false, \ 2476 "Pause and wait for keypress on exit if a debugger is attached") \ 2477 \ 2478 product(bool, ExtendedDTraceProbes, false, \ 2479 "Enable performance-impacting dtrace probes") \ 2480 \ 2481 product(bool, DTraceMethodProbes, false, \ 2482 "Enable dtrace probes for method-entry and method-exit") \ 2483 \ 2484 product(bool, DTraceAllocProbes, false, \ 2485 "Enable dtrace probes for object allocation") \ 2486 \ 2487 product(bool, DTraceMonitorProbes, false, \ 2488 "Enable dtrace probes for monitor events") \ 2489 \ 2490 product(bool, RelaxAccessControlCheck, false, \ 2491 "Relax the access control checks in the verifier") \ 2492 \ 2493 product(uintx, StringTableSize, defaultStringTableSize, \ 2494 "Number of buckets in the interned String table " \ 2495 "(will be rounded to nearest higher power of 2)") \ 2496 range(minimumStringTableSize, 16777216ul) \ 2497 \ 2498 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 2499 "Number of buckets in the JVM internal Symbol table") \ 2500 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 2501 \ 2502 product(bool, UseStringDeduplication, false, \ 2503 "Use string deduplication") \ 2504 \ 2505 product(uintx, StringDeduplicationAgeThreshold, 3, \ 2506 "A string must reach this age (or be promoted to an old region) " \ 2507 "to be considered for deduplication") \ 2508 range(1, markOopDesc::max_age) \ 2509 \ 2510 diagnostic(bool, StringDeduplicationResizeALot, false, \ 2511 "Force table resize every time the table is scanned") \ 2512 \ 2513 diagnostic(bool, StringDeduplicationRehashALot, false, \ 2514 "Force table rehash every time the table is scanned") \ 2515 \ 2516 diagnostic(bool, WhiteBoxAPI, false, \ 2517 "Enable internal testing APIs") \ 2518 \ 2519 experimental(intx, SurvivorAlignmentInBytes, 0, \ 2520 "Default survivor space alignment in bytes") \ 2521 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 2522 \ 2523 product(ccstr, DumpLoadedClassList, NULL, \ 2524 "Dump the names all loaded classes, that could be stored into " \ 2525 "the CDS archive, in the specified file") \ 2526 \ 2527 product(ccstr, SharedClassListFile, NULL, \ 2528 "Override the default CDS class list") \ 2529 \ 2530 product(ccstr, SharedArchiveFile, NULL, \ 2531 "Override the default location of the CDS archive file") \ 2532 \ 2533 product(ccstr, ExtraSharedClassListFile, NULL, \ 2534 "Extra classlist for building the CDS archive file") \ 2535 \ 2536 experimental(size_t, ArrayAllocatorMallocLimit, \ 2537 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 2538 "Allocation less than this value will be allocated " \ 2539 "using malloc. Larger allocations will use mmap.") \ 2540 \ 2541 experimental(bool, AlwaysAtomicAccesses, false, \ 2542 "Accesses to all variables should always be atomic") \ 2543 \ 2544 diagnostic(bool, UseUnalignedAccesses, false, \ 2545 "Use unaligned memory accesses in Unsafe") \ 2546 \ 2547 product_pd(bool, PreserveFramePointer, \ 2548 "Use the FP register for holding the frame pointer " \ 2549 "and not as a general purpose register.") \ 2550 \ 2551 diagnostic(bool, CheckIntrinsics, true, \ 2552 "When a class C is loaded, check that " \ 2553 "(1) all intrinsics defined by the VM for class C are present "\ 2554 "in the loaded class file and are marked with the " \ 2555 "@HotSpotIntrinsicCandidate annotation, that " \ 2556 "(2) there is an intrinsic registered for all loaded methods " \ 2557 "that are annotated with the @HotSpotIntrinsicCandidate " \ 2558 "annotation, and that " \ 2559 "(3) no orphan methods exist for class C (i.e., methods for " \ 2560 "which the VM declares an intrinsic but that are not declared "\ 2561 "in the loaded class C. " \ 2562 "Check (3) is available only in debug builds.") \ 2563 \ 2564 diagnostic_pd(intx, InitArrayShortSize, \ 2565 "Threshold small size (in bytes) for clearing arrays. " \ 2566 "Anything this size or smaller may get converted to discrete " \ 2567 "scalar stores.") \ 2568 range(0, max_intx) \ 2569 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ 2570 \ 2571 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 2572 "Disable backwards compatibility for compile commands.") \ 2573 \ 2574 diagnostic(bool, CompilerDirectivesPrint, false, \ 2575 "Print compiler directives on installation.") \ 2576 diagnostic(int, CompilerDirectivesLimit, 50, \ 2577 "Limit on number of compiler directives.") \ 2578 \ 2579 product(ccstr, AllocateHeapAt, NULL, \ 2580 "Path to the directoy where a temporary file will be created " \ 2581 "to use as the backing store for Java Heap.") \ 2582 \ 2583 experimental(ccstr, AllocateOldGenAt, NULL, \ 2584 "Path to the directoy where a temporary file will be " \ 2585 "created to use as the backing store for old generation." \ 2586 "File of size Xmx is pre-allocated for performance reason, so" \ 2587 "we need that much space available") \ 2588 \ 2589 develop(bool, VerifyMetaspace, false, \ 2590 "Verify metaspace on chunk movements.") \ 2591 \ 2592 diagnostic(bool, ShowRegistersOnAssert, true, \ 2593 "On internal errors, include registers in error report.") \ 2594 \ 2595 experimental(bool, UseSwitchProfiling, true, \ 2596 "leverage profiling for table/lookup switch") \ 2597 \ 2598 JFR_ONLY(product(bool, FlightRecorder, false, \ 2599 "Enable Flight Recorder")) \ 2600 \ 2601 JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL, \ 2602 "Flight Recorder options")) \ 2603 \ 2604 JFR_ONLY(product(ccstr, StartFlightRecording, NULL, \ 2605 "Start flight recording with options")) \ 2606 \ 2607 experimental(bool, UseFastUnorderedTimeStamps, false, \ 2608 "Use platform unstable time where supported for timestamps only") \ 2609 \ 2610 product(bool, EnableValhalla, false, \ 2611 "Enable experimental Valhalla features") \ 2612 \ 2613 product(bool, EnableValhallaC1, false, \ 2614 "Enable C1 compiler for Valhalla") \ 2615 \ 2616 product_pd(bool, ValueTypePassFieldsAsArgs, \ 2617 "Pass each value type field as an argument at calls") \ 2618 \ 2619 product_pd(bool, ValueTypeReturnedAsFields, \ 2620 "Return fields instead of a value type reference") \ 2621 \ 2622 develop(bool, StressValueTypePassFieldsAsArgs, false, \ 2623 "Stress passing each value type field as an argument at calls") \ 2624 \ 2625 develop(bool, StressValueTypeReturnedAsFields, false, \ 2626 "Stress return of fields instead of a value type reference") \ 2627 \ 2628 develop(bool, ScalarizeValueTypes, true, \ 2629 "Scalarize value types in compiled code") \ 2630 \ 2631 experimental(bool, UsePointerPerturbation, false, \ 2632 "With value types, use the perturbation scheme for acmp") \ 2633 2634 2635 2636 #define VM_FLAGS(develop, \ 2637 develop_pd, \ 2638 product, \ 2639 product_pd, \ 2640 diagnostic, \ 2641 diagnostic_pd, \ 2642 experimental, \ 2643 notproduct, \ 2644 manageable, \ 2645 product_rw, \ 2646 lp64_product, \ 2647 range, \ 2648 constraint, \ 2649 writeable) \ 2650 \ 2651 RUNTIME_FLAGS( \ 2652 develop, \ 2653 develop_pd, \ 2654 product, \ 2655 product_pd, \ 2656 diagnostic, \ 2657 diagnostic_pd, \ 2658 experimental, \ 2659 notproduct, \ 2660 manageable, \ 2661 product_rw, \ 2662 lp64_product, \ 2663 range, \ 2664 constraint, \ 2665 writeable) \ 2666 \ 2667 GC_FLAGS( \ 2668 develop, \ 2669 develop_pd, \ 2670 product, \ 2671 product_pd, \ 2672 diagnostic, \ 2673 diagnostic_pd, \ 2674 experimental, \ 2675 notproduct, \ 2676 manageable, \ 2677 product_rw, \ 2678 lp64_product, \ 2679 range, \ 2680 constraint, \ 2681 writeable) \ 2682 2683 /* 2684 * Macros for factoring of globals 2685 */ 2686 2687 // Interface macros 2688 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2689 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 2690 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 2691 #define DECLARE_PD_DIAGNOSTIC_FLAG(type, name, doc) extern "C" type name; 2692 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 2693 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 2694 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 2695 #ifdef PRODUCT 2696 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 2697 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 2698 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 2699 #else 2700 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 2701 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 2702 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2703 #endif // PRODUCT 2704 // Special LP64 flags, product only needed for now. 2705 #ifdef _LP64 2706 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2707 #else 2708 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 2709 #endif // _LP64 2710 2711 // Implementation macros 2712 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 2713 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 2714 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 2715 #define MATERIALIZE_PD_DIAGNOSTIC_FLAG(type, name, doc) type name = pd_##name; 2716 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 2717 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 2718 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 2719 #ifdef PRODUCT 2720 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 2721 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 2722 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 2723 #else 2724 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 2725 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 2726 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 2727 #endif // PRODUCT 2728 #ifdef _LP64 2729 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 2730 #else 2731 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 2732 #endif // _LP64 2733 2734 // Only materialize src code for range checking when required, ignore otherwise 2735 #define IGNORE_RANGE(a, b) 2736 // Only materialize src code for contraint checking when required, ignore otherwise 2737 #define IGNORE_CONSTRAINT(func,type) 2738 2739 #define IGNORE_WRITEABLE(type) 2740 2741 VM_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2742 DECLARE_PD_DEVELOPER_FLAG, \ 2743 DECLARE_PRODUCT_FLAG, \ 2744 DECLARE_PD_PRODUCT_FLAG, \ 2745 DECLARE_DIAGNOSTIC_FLAG, \ 2746 DECLARE_PD_DIAGNOSTIC_FLAG, \ 2747 DECLARE_EXPERIMENTAL_FLAG, \ 2748 DECLARE_NOTPRODUCT_FLAG, \ 2749 DECLARE_MANAGEABLE_FLAG, \ 2750 DECLARE_PRODUCT_RW_FLAG, \ 2751 DECLARE_LP64_PRODUCT_FLAG, \ 2752 IGNORE_RANGE, \ 2753 IGNORE_CONSTRAINT, \ 2754 IGNORE_WRITEABLE) 2755 2756 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2757 DECLARE_PD_DEVELOPER_FLAG, \ 2758 DECLARE_PRODUCT_FLAG, \ 2759 DECLARE_PD_PRODUCT_FLAG, \ 2760 DECLARE_DIAGNOSTIC_FLAG, \ 2761 DECLARE_PD_DIAGNOSTIC_FLAG, \ 2762 DECLARE_NOTPRODUCT_FLAG, \ 2763 IGNORE_RANGE, \ 2764 IGNORE_CONSTRAINT, \ 2765 IGNORE_WRITEABLE) 2766 2767 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2768 DECLARE_PRODUCT_FLAG, \ 2769 DECLARE_DIAGNOSTIC_FLAG, \ 2770 DECLARE_EXPERIMENTAL_FLAG, \ 2771 DECLARE_NOTPRODUCT_FLAG, \ 2772 IGNORE_RANGE, \ 2773 IGNORE_CONSTRAINT, \ 2774 IGNORE_WRITEABLE) 2775 2776 // Extensions 2777 2778 #include "runtime/globals_ext.hpp" 2779 2780 #endif // SHARE_RUNTIME_GLOBALS_HPP