1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26 #define SHARE_VM_RUNTIME_GLOBALS_HPP 27 28 #include "gc/shared/gc_globals.hpp" 29 #include "utilities/align.hpp" 30 #include "utilities/globalDefinitions.hpp" 31 #include "utilities/macros.hpp" 32 33 #include <float.h> // for DBL_MAX 34 35 // The larger HeapWordSize for 64bit requires larger heaps 36 // for the same application running in 64bit. See bug 4967770. 37 // The minimum alignment to a heap word size is done. Other 38 // parts of the memory system may require additional alignment 39 // and are responsible for those alignments. 40 #ifdef _LP64 41 #define ScaleForWordSize(x) align_down_((x) * 13 / 10, HeapWordSize) 42 #else 43 #define ScaleForWordSize(x) (x) 44 #endif 45 46 // use this for flags that are true per default in the tiered build 47 // but false in non-tiered builds, and vice versa 48 #ifdef TIERED 49 #define trueInTiered true 50 #define falseInTiered false 51 #else 52 #define trueInTiered false 53 #define falseInTiered true 54 #endif 55 56 #include CPU_HEADER(globals) 57 #include OS_HEADER(globals) 58 #include OS_CPU_HEADER(globals) 59 #ifdef COMPILER1 60 #include CPU_HEADER(c1_globals) 61 #include OS_HEADER(c1_globals) 62 #endif 63 #ifdef COMPILER2 64 #include CPU_HEADER(c2_globals) 65 #include OS_HEADER(c2_globals) 66 #endif 67 68 #if !defined(COMPILER1) && !defined(COMPILER2) && !INCLUDE_JVMCI 69 define_pd_global(bool, BackgroundCompilation, false); 70 define_pd_global(bool, UseTLAB, false); 71 define_pd_global(bool, CICompileOSR, false); 72 define_pd_global(bool, UseTypeProfile, false); 73 define_pd_global(bool, UseOnStackReplacement, false); 74 define_pd_global(bool, InlineIntrinsics, false); 75 define_pd_global(bool, PreferInterpreterNativeStubs, true); 76 define_pd_global(bool, ProfileInterpreter, false); 77 define_pd_global(bool, ProfileTraps, false); 78 define_pd_global(bool, TieredCompilation, false); 79 80 define_pd_global(intx, CompileThreshold, 0); 81 82 define_pd_global(intx, OnStackReplacePercentage, 0); 83 define_pd_global(bool, ResizeTLAB, false); 84 define_pd_global(intx, FreqInlineSize, 0); 85 define_pd_global(size_t, NewSizeThreadIncrease, 4*K); 86 define_pd_global(bool, InlineClassNatives, true); 87 define_pd_global(bool, InlineUnsafeOps, true); 88 define_pd_global(uintx, InitialCodeCacheSize, 160*K); 89 define_pd_global(uintx, ReservedCodeCacheSize, 32*M); 90 define_pd_global(uintx, NonProfiledCodeHeapSize, 0); 91 define_pd_global(uintx, ProfiledCodeHeapSize, 0); 92 define_pd_global(uintx, NonNMethodCodeHeapSize, 32*M); 93 94 define_pd_global(uintx, CodeCacheExpansionSize, 32*K); 95 define_pd_global(uintx, CodeCacheMinBlockLength, 1); 96 define_pd_global(uintx, CodeCacheMinimumUseSpace, 200*K); 97 define_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 98 define_pd_global(bool, NeverActAsServerClassMachine, true); 99 define_pd_global(uint64_t,MaxRAM, 1ULL*G); 100 #define CI_COMPILER_COUNT 0 101 #else 102 103 #if COMPILER2_OR_JVMCI 104 #define CI_COMPILER_COUNT 2 105 #else 106 #define CI_COMPILER_COUNT 1 107 #endif // COMPILER2_OR_JVMCI 108 109 #endif // no compilers 110 111 // use this for flags that are true by default in the debug version but 112 // false in the optimized version, and vice versa 113 #ifdef ASSERT 114 #define trueInDebug true 115 #define falseInDebug false 116 #else 117 #define trueInDebug false 118 #define falseInDebug true 119 #endif 120 121 // use this for flags that are true per default in the product build 122 // but false in development builds, and vice versa 123 #ifdef PRODUCT 124 #define trueInProduct true 125 #define falseInProduct false 126 #else 127 #define trueInProduct false 128 #define falseInProduct true 129 #endif 130 131 // develop flags are settable / visible only during development and are constant in the PRODUCT version 132 // product flags are always settable / visible 133 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 134 135 // A flag must be declared with one of the following types: 136 // bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 137 // The type "ccstr" is an alias for "const char*" and is used 138 // only in this file, because the macrology requires single-token type names. 139 140 // Note: Diagnostic options not meant for VM tuning or for product modes. 141 // They are to be used for VM quality assurance or field diagnosis 142 // of VM bugs. They are hidden so that users will not be encouraged to 143 // try them as if they were VM ordinary execution options. However, they 144 // are available in the product version of the VM. Under instruction 145 // from support engineers, VM customers can turn them on to collect 146 // diagnostic information about VM problems. To use a VM diagnostic 147 // option, you must first specify +UnlockDiagnosticVMOptions. 148 // (This master switch also affects the behavior of -Xprintflags.) 149 // 150 // experimental flags are in support of features that are not 151 // part of the officially supported product, but are available 152 // for experimenting with. They could, for example, be performance 153 // features that may not have undergone full or rigorous QA, but which may 154 // help performance in some cases and released for experimentation 155 // by the community of users and developers. This flag also allows one to 156 // be able to build a fully supported product that nonetheless also 157 // ships with some unsupported, lightly tested, experimental features. 158 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 159 // UnlockExperimentalVMOptions flag, which allows the control and 160 // modification of the experimental flags. 161 // 162 // Nota bene: neither diagnostic nor experimental options should be used casually, 163 // and they are not supported on production loads, except under explicit 164 // direction from support engineers. 165 // 166 // manageable flags are writeable external product flags. 167 // They are dynamically writeable through the JDK management interface 168 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 169 // These flags are external exported interface (see CCC). The list of 170 // manageable flags can be queried programmatically through the management 171 // interface. 172 // 173 // A flag can be made as "manageable" only if 174 // - the flag is defined in a CCC as an external exported interface. 175 // - the VM implementation supports dynamic setting of the flag. 176 // This implies that the VM must *always* query the flag variable 177 // and not reuse state related to the flag state at any given time. 178 // - you want the flag to be queried programmatically by the customers. 179 // 180 // product_rw flags are writeable internal product flags. 181 // They are like "manageable" flags but for internal/private use. 182 // The list of product_rw flags are internal/private flags which 183 // may be changed/removed in a future release. It can be set 184 // through the management interface to get/set value 185 // when the name of flag is supplied. 186 // 187 // A flag can be made as "product_rw" only if 188 // - the VM implementation supports dynamic setting of the flag. 189 // This implies that the VM must *always* query the flag variable 190 // and not reuse state related to the flag state at any given time. 191 // 192 // Note that when there is a need to support develop flags to be writeable, 193 // it can be done in the same way as product_rw. 194 // 195 // range is a macro that will expand to min and max arguments for range 196 // checking code if provided - see jvmFlagRangeList.hpp 197 // 198 // constraint is a macro that will expand to custom function call 199 // for constraint checking if provided - see jvmFlagConstraintList.hpp 200 // 201 // writeable is a macro that controls if and how the value can change during the runtime 202 // 203 // writeable(Always) is optional and allows the flag to have its value changed 204 // without any limitations at any time 205 // 206 // writeable(Once) flag value's can be only set once during the lifetime of VM 207 // 208 // writeable(CommandLineOnly) flag value's can be only set from command line 209 // (multiple times allowed) 210 // 211 212 213 #define RUNTIME_FLAGS(develop, \ 214 develop_pd, \ 215 product, \ 216 product_pd, \ 217 diagnostic, \ 218 diagnostic_pd, \ 219 experimental, \ 220 notproduct, \ 221 manageable, \ 222 product_rw, \ 223 lp64_product, \ 224 range, \ 225 constraint, \ 226 writeable) \ 227 \ 228 lp64_product(bool, UseCompressedOops, false, \ 229 "Use 32-bit object references in 64-bit VM. " \ 230 "lp64_product means flag is always constant in 32 bit VM") \ 231 \ 232 lp64_product(bool, UseCompressedClassPointers, false, \ 233 "Use 32-bit class pointers in 64-bit VM. " \ 234 "lp64_product means flag is always constant in 32 bit VM") \ 235 \ 236 notproduct(bool, CheckCompressedOops, true, \ 237 "Generate checks in encoding/decoding code in debug VM") \ 238 \ 239 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 240 "Heap allocation steps through preferred address regions to find" \ 241 " where it can allocate the heap. Number of steps to take per " \ 242 "region.") \ 243 range(1, max_uintx) \ 244 \ 245 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 246 "Default object alignment in bytes, 8 is minimum") \ 247 range(8, 256) \ 248 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 249 \ 250 product(bool, AssumeMP, true, \ 251 "(Deprecated) Instruct the VM to assume multiple processors are available")\ 252 \ 253 /* UseMembar is theoretically a temp flag used for memory barrier */ \ 254 /* removal testing. It was supposed to be removed before FCS but has */ \ 255 /* been re-added (see 6401008) */ \ 256 product_pd(bool, UseMembar, \ 257 "(Unstable) Issues membars on thread state transitions") \ 258 \ 259 develop(bool, CleanChunkPoolAsync, true, \ 260 "Clean the chunk pool asynchronously") \ 261 \ 262 product_pd(bool, ThreadLocalHandshakes, \ 263 "Use thread-local polls instead of global poll for safepoints.") \ 264 constraint(ThreadLocalHandshakesConstraintFunc,AfterErgo) \ 265 \ 266 diagnostic(uint, HandshakeTimeout, 0, \ 267 "If nonzero set a timeout in milliseconds for handshakes") \ 268 \ 269 experimental(bool, AlwaysSafeConstructors, false, \ 270 "Force safe construction, as if all fields are final.") \ 271 \ 272 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 273 "Enable normal processing of flags relating to field diagnostics")\ 274 \ 275 experimental(bool, UnlockExperimentalVMOptions, false, \ 276 "Enable normal processing of flags relating to experimental " \ 277 "features") \ 278 \ 279 product(bool, JavaMonitorsInStackTrace, true, \ 280 "Print information about Java monitor locks when the stacks are" \ 281 "dumped") \ 282 \ 283 product_pd(bool, UseLargePages, \ 284 "Use large page memory") \ 285 \ 286 product_pd(bool, UseLargePagesIndividualAllocation, \ 287 "Allocate large pages individually for better affinity") \ 288 \ 289 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 290 "Fail large pages individual allocation") \ 291 \ 292 product(bool, UseLargePagesInMetaspace, false, \ 293 "Use large page memory in metaspace. " \ 294 "Only used if UseLargePages is enabled.") \ 295 \ 296 product(bool, UseNUMA, false, \ 297 "Use NUMA if available") \ 298 \ 299 product(bool, UseNUMAInterleaving, false, \ 300 "Interleave memory across NUMA nodes if available") \ 301 \ 302 product(size_t, NUMAInterleaveGranularity, 2*M, \ 303 "Granularity to use for NUMA interleaving on Windows OS") \ 304 range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \ 305 \ 306 product(bool, ForceNUMA, false, \ 307 "Force NUMA optimizations on single-node/UMA systems") \ 308 \ 309 product(uintx, NUMAChunkResizeWeight, 20, \ 310 "Percentage (0-100) used to weight the current sample when " \ 311 "computing exponentially decaying average for " \ 312 "AdaptiveNUMAChunkSizing") \ 313 range(0, 100) \ 314 \ 315 product(size_t, NUMASpaceResizeRate, 1*G, \ 316 "Do not reallocate more than this amount per collection") \ 317 range(0, max_uintx) \ 318 \ 319 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 320 "Enable adaptive chunk sizing for NUMA") \ 321 \ 322 product(bool, NUMAStats, false, \ 323 "Print NUMA stats in detailed heap information") \ 324 \ 325 product(uintx, NUMAPageScanRate, 256, \ 326 "Maximum number of pages to include in the page scan procedure") \ 327 range(0, max_uintx) \ 328 \ 329 product_pd(bool, NeedsDeoptSuspend, \ 330 "True for register window machines (sparc/ia64)") \ 331 \ 332 product(intx, UseSSE, 99, \ 333 "Highest supported SSE instructions set on x86/x64") \ 334 range(0, 99) \ 335 \ 336 product(bool, UseAES, false, \ 337 "Control whether AES instructions are used when available") \ 338 \ 339 product(bool, UseFMA, false, \ 340 "Control whether FMA instructions are used when available") \ 341 \ 342 product(bool, UseSHA, false, \ 343 "Control whether SHA instructions are used when available") \ 344 \ 345 diagnostic(bool, UseGHASHIntrinsics, false, \ 346 "Use intrinsics for GHASH versions of crypto") \ 347 \ 348 product(bool, UseBASE64Intrinsics, false, \ 349 "Use intrinsics for java.util.Base64") \ 350 \ 351 product(size_t, LargePageSizeInBytes, 0, \ 352 "Large page size (0 to let VM choose the page size)") \ 353 range(0, max_uintx) \ 354 \ 355 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 356 "Use large pages if maximum heap is at least this big") \ 357 range(0, max_uintx) \ 358 \ 359 product(bool, ForceTimeHighResolution, false, \ 360 "Using high time resolution (for Win32 only)") \ 361 \ 362 develop(bool, TracePcPatching, false, \ 363 "Trace usage of frame::patch_pc") \ 364 \ 365 develop(bool, TraceRelocator, false, \ 366 "Trace the bytecode relocator") \ 367 \ 368 develop(bool, TraceLongCompiles, false, \ 369 "Print out every time compilation is longer than " \ 370 "a given threshold") \ 371 \ 372 develop(bool, SafepointALot, false, \ 373 "Generate a lot of safepoints. This works with " \ 374 "GuaranteedSafepointInterval") \ 375 \ 376 product_pd(bool, BackgroundCompilation, \ 377 "A thread requesting compilation is not blocked during " \ 378 "compilation") \ 379 \ 380 product(bool, PrintVMQWaitTime, false, \ 381 "Print out the waiting time in VM operation queue") \ 382 \ 383 product(bool, MethodFlushing, true, \ 384 "Reclamation of zombie and not-entrant methods") \ 385 \ 386 develop(bool, VerifyStack, false, \ 387 "Verify stack of each thread when it is entering a runtime call") \ 388 \ 389 diagnostic(bool, ForceUnreachable, false, \ 390 "Make all non code cache addresses to be unreachable by " \ 391 "forcing use of 64bit literal fixups") \ 392 \ 393 notproduct(bool, StressDerivedPointers, false, \ 394 "Force scavenge when a derived pointer is detected on stack " \ 395 "after rtm call") \ 396 \ 397 develop(bool, TraceDerivedPointers, false, \ 398 "Trace traversal of derived pointers on stack") \ 399 \ 400 notproduct(bool, TraceCodeBlobStacks, false, \ 401 "Trace stack-walk of codeblobs") \ 402 \ 403 product(bool, PrintJNIResolving, false, \ 404 "Used to implement -v:jni") \ 405 \ 406 notproduct(bool, PrintRewrites, false, \ 407 "Print methods that are being rewritten") \ 408 \ 409 product(bool, UseInlineCaches, true, \ 410 "Use Inline Caches for virtual calls ") \ 411 \ 412 diagnostic(bool, InlineArrayCopy, true, \ 413 "Inline arraycopy native that is known to be part of " \ 414 "base library DLL") \ 415 \ 416 diagnostic(bool, InlineObjectHash, true, \ 417 "Inline Object::hashCode() native that is known to be part " \ 418 "of base library DLL") \ 419 \ 420 diagnostic(bool, InlineNatives, true, \ 421 "Inline natives that are known to be part of base library DLL") \ 422 \ 423 diagnostic(bool, InlineMathNatives, true, \ 424 "Inline SinD, CosD, etc.") \ 425 \ 426 diagnostic(bool, InlineClassNatives, true, \ 427 "Inline Class.isInstance, etc") \ 428 \ 429 diagnostic(bool, InlineThreadNatives, true, \ 430 "Inline Thread.currentThread, etc") \ 431 \ 432 diagnostic(bool, InlineUnsafeOps, true, \ 433 "Inline memory ops (native methods) from Unsafe") \ 434 \ 435 product(bool, CriticalJNINatives, true, \ 436 "Check for critical JNI entry points") \ 437 \ 438 notproduct(bool, StressCriticalJNINatives, false, \ 439 "Exercise register saving code in critical natives") \ 440 \ 441 diagnostic(bool, UseAESIntrinsics, false, \ 442 "Use intrinsics for AES versions of crypto") \ 443 \ 444 diagnostic(bool, UseAESCTRIntrinsics, false, \ 445 "Use intrinsics for the paralleled version of AES/CTR crypto") \ 446 \ 447 diagnostic(bool, UseSHA1Intrinsics, false, \ 448 "Use intrinsics for SHA-1 crypto hash function. " \ 449 "Requires that UseSHA is enabled.") \ 450 \ 451 diagnostic(bool, UseSHA256Intrinsics, false, \ 452 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 453 "Requires that UseSHA is enabled.") \ 454 \ 455 diagnostic(bool, UseSHA512Intrinsics, false, \ 456 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 457 "Requires that UseSHA is enabled.") \ 458 \ 459 diagnostic(bool, UseCRC32Intrinsics, false, \ 460 "use intrinsics for java.util.zip.CRC32") \ 461 \ 462 diagnostic(bool, UseCRC32CIntrinsics, false, \ 463 "use intrinsics for java.util.zip.CRC32C") \ 464 \ 465 diagnostic(bool, UseAdler32Intrinsics, false, \ 466 "use intrinsics for java.util.zip.Adler32") \ 467 \ 468 diagnostic(bool, UseVectorizedMismatchIntrinsic, false, \ 469 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ 470 \ 471 diagnostic(ccstrlist, DisableIntrinsic, "", \ 472 "do not expand intrinsics whose (internal) names appear here") \ 473 \ 474 develop(bool, TraceCallFixup, false, \ 475 "Trace all call fixups") \ 476 \ 477 develop(bool, DeoptimizeALot, false, \ 478 "Deoptimize at every exit from the runtime system") \ 479 \ 480 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 481 "A comma separated list of bcis to deoptimize at") \ 482 \ 483 product(bool, DeoptimizeRandom, false, \ 484 "Deoptimize random frames on random exit from the runtime system")\ 485 \ 486 notproduct(bool, ZombieALot, false, \ 487 "Create zombies (non-entrant) at exit from the runtime system") \ 488 \ 489 notproduct(bool, WalkStackALot, false, \ 490 "Trace stack (no print) at every exit from the runtime system") \ 491 \ 492 product(bool, Debugging, false, \ 493 "Set when executing debug methods in debug.cpp " \ 494 "(to prevent triggering assertions)") \ 495 \ 496 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 497 "Enable strict checks that safepoints cannot happen for threads " \ 498 "that use NoSafepointVerifier") \ 499 \ 500 notproduct(bool, VerifyLastFrame, false, \ 501 "Verify oops on last frame on entry to VM") \ 502 \ 503 product(bool, FailOverToOldVerifier, true, \ 504 "Fail over to old verifier when split verifier fails") \ 505 \ 506 product(bool, SafepointTimeout, false, \ 507 "Time out and warn or fail after SafepointTimeoutDelay " \ 508 "milliseconds if failed to reach safepoint") \ 509 \ 510 develop(bool, DieOnSafepointTimeout, false, \ 511 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 512 \ 513 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 514 /* typically, at most a few retries are needed */ \ 515 product(intx, SuspendRetryCount, 50, \ 516 "Maximum retry count for an external suspend request") \ 517 range(0, max_intx) \ 518 \ 519 product(intx, SuspendRetryDelay, 5, \ 520 "Milliseconds to delay per retry (* current_retry_count)") \ 521 range(0, max_intx) \ 522 \ 523 product(bool, AssertOnSuspendWaitFailure, false, \ 524 "Assert/Guarantee on external suspend wait failure") \ 525 \ 526 product(bool, TraceSuspendWaitFailures, false, \ 527 "Trace external suspend wait failures") \ 528 \ 529 product(bool, MaxFDLimit, true, \ 530 "Bump the number of file descriptors to maximum in Solaris") \ 531 \ 532 diagnostic(bool, LogEvents, true, \ 533 "Enable the various ring buffer event logs") \ 534 \ 535 diagnostic(uintx, LogEventsBufferEntries, 10, \ 536 "Number of ring buffer event logs") \ 537 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 538 \ 539 product(bool, BytecodeVerificationRemote, true, \ 540 "Enable the Java bytecode verifier for remote classes") \ 541 \ 542 product(bool, BytecodeVerificationLocal, false, \ 543 "Enable the Java bytecode verifier for local classes") \ 544 \ 545 develop(bool, ForceFloatExceptions, trueInDebug, \ 546 "Force exceptions on FP stack under/overflow") \ 547 \ 548 develop(bool, VerifyStackAtCalls, false, \ 549 "Verify that the stack pointer is unchanged after calls") \ 550 \ 551 develop(bool, TraceJavaAssertions, false, \ 552 "Trace java language assertions") \ 553 \ 554 notproduct(bool, VerifyCodeCache, false, \ 555 "Verify code cache on memory allocation/deallocation") \ 556 \ 557 develop(bool, UseMallocOnly, false, \ 558 "Use only malloc/free for allocation (no resource area/arena)") \ 559 \ 560 develop(bool, PrintMallocStatistics, false, \ 561 "Print malloc/free statistics") \ 562 \ 563 develop(bool, ZapResourceArea, trueInDebug, \ 564 "Zap freed resource/arena space with 0xABABABAB") \ 565 \ 566 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 567 "Zap freed VM handle space with 0xBCBCBCBC") \ 568 \ 569 notproduct(bool, ZapStackSegments, trueInDebug, \ 570 "Zap allocated/freed stack segments with 0xFADFADED") \ 571 \ 572 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 573 "Zap unused heap space with 0xBAADBABE") \ 574 \ 575 develop(bool, CheckZapUnusedHeapArea, false, \ 576 "Check zapping of unused heap space") \ 577 \ 578 develop(bool, ZapFillerObjects, trueInDebug, \ 579 "Zap filler objects with 0xDEAFBABE") \ 580 \ 581 develop(bool, PrintVMMessages, true, \ 582 "Print VM messages on console") \ 583 \ 584 notproduct(uintx, ErrorHandlerTest, 0, \ 585 "If > 0, provokes an error after VM initialization; the value " \ 586 "determines which error to provoke. See test_error_handler() " \ 587 "in vmError.cpp.") \ 588 \ 589 notproduct(uintx, TestCrashInErrorHandler, 0, \ 590 "If > 0, provokes an error inside VM error handler (a secondary " \ 591 "crash). see test_error_handler() in vmError.cpp") \ 592 \ 593 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 594 "If true, tests SafeFetch inside error handler.") \ 595 \ 596 notproduct(bool, TestUnresponsiveErrorHandler, false, \ 597 "If true, simulates an unresponsive error handler.") \ 598 \ 599 develop(bool, Verbose, false, \ 600 "Print additional debugging information from other modes") \ 601 \ 602 develop(bool, PrintMiscellaneous, false, \ 603 "Print uncategorized debugging information (requires +Verbose)") \ 604 \ 605 develop(bool, WizardMode, false, \ 606 "Print much more debugging information") \ 607 \ 608 product(bool, ShowMessageBoxOnError, false, \ 609 "Keep process alive on VM fatal error") \ 610 \ 611 product(bool, CreateCoredumpOnCrash, true, \ 612 "Create core/mini dump on VM fatal error") \ 613 \ 614 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 615 "Timeout, in seconds, to limit the time spent on writing an " \ 616 "error log in case of a crash.") \ 617 range(0, (uint64_t)max_jlong/1000) \ 618 \ 619 product_pd(bool, UseOSErrorReporting, \ 620 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 621 \ 622 product(bool, SuppressFatalErrorMessage, false, \ 623 "Report NO fatal error message (avoid deadlock)") \ 624 \ 625 product(ccstrlist, OnError, "", \ 626 "Run user-defined commands on fatal error; see VMError.cpp " \ 627 "for examples") \ 628 \ 629 product(ccstrlist, OnOutOfMemoryError, "", \ 630 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 631 \ 632 manageable(bool, HeapDumpBeforeFullGC, false, \ 633 "Dump heap to file before any major stop-the-world GC") \ 634 \ 635 manageable(bool, HeapDumpAfterFullGC, false, \ 636 "Dump heap to file after any major stop-the-world GC") \ 637 \ 638 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 639 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 640 \ 641 manageable(ccstr, HeapDumpPath, NULL, \ 642 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 643 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 644 "in the working directory)") \ 645 \ 646 develop(bool, BreakAtWarning, false, \ 647 "Execute breakpoint upon encountering VM warning") \ 648 \ 649 develop(bool, UseFakeTimers, false, \ 650 "Tell whether the VM should use system time or a fake timer") \ 651 \ 652 product(ccstr, NativeMemoryTracking, "off", \ 653 "Native memory tracking options") \ 654 \ 655 diagnostic(bool, PrintNMTStatistics, false, \ 656 "Print native memory tracking summary data if it is on") \ 657 \ 658 diagnostic(bool, LogCompilation, false, \ 659 "Log compilation activity in detail to LogFile") \ 660 \ 661 product(bool, PrintCompilation, false, \ 662 "Print compilations") \ 663 \ 664 product(bool, PrintExtendedThreadInfo, false, \ 665 "Print more information in thread dump") \ 666 \ 667 diagnostic(bool, TraceNMethodInstalls, false, \ 668 "Trace nmethod installation") \ 669 \ 670 diagnostic(intx, ScavengeRootsInCode, 2, \ 671 "0: do not allow scavengable oops in the code cache; " \ 672 "1: allow scavenging from the code cache; " \ 673 "2: emit as many constants as the compiler can see") \ 674 range(0, 2) \ 675 \ 676 product(bool, AlwaysRestoreFPU, false, \ 677 "Restore the FPU control word after every JNI call (expensive)") \ 678 \ 679 diagnostic(bool, PrintCompilation2, false, \ 680 "Print additional statistics per compilation") \ 681 \ 682 diagnostic(bool, PrintAdapterHandlers, false, \ 683 "Print code generated for i2c/c2i adapters") \ 684 \ 685 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 686 "Verify that i2c/c2i adapters are called properly") \ 687 \ 688 develop(bool, VerifyAdapterSharing, false, \ 689 "Verify that the code for shared adapters is the equivalent") \ 690 \ 691 diagnostic(bool, PrintAssembly, false, \ 692 "Print assembly code (using external disassembler.so)") \ 693 \ 694 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 695 "Print options string passed to disassembler.so") \ 696 \ 697 notproduct(bool, PrintNMethodStatistics, false, \ 698 "Print a summary statistic for the generated nmethods") \ 699 \ 700 diagnostic(bool, PrintNMethods, false, \ 701 "Print assembly code for nmethods when generated") \ 702 \ 703 diagnostic(bool, PrintNativeNMethods, false, \ 704 "Print assembly code for native nmethods when generated") \ 705 \ 706 develop(bool, PrintDebugInfo, false, \ 707 "Print debug information for all nmethods when generated") \ 708 \ 709 develop(bool, PrintRelocations, false, \ 710 "Print relocation information for all nmethods when generated") \ 711 \ 712 develop(bool, PrintDependencies, false, \ 713 "Print dependency information for all nmethods when generated") \ 714 \ 715 develop(bool, PrintExceptionHandlers, false, \ 716 "Print exception handler tables for all nmethods when generated") \ 717 \ 718 develop(bool, StressCompiledExceptionHandlers, false, \ 719 "Exercise compiled exception handlers") \ 720 \ 721 develop(bool, InterceptOSException, false, \ 722 "Start debugger when an implicit OS (e.g. NULL) " \ 723 "exception happens") \ 724 \ 725 product(bool, PrintCodeCache, false, \ 726 "Print the code cache memory usage when exiting") \ 727 \ 728 develop(bool, PrintCodeCache2, false, \ 729 "Print detailed usage information on the code cache when exiting")\ 730 \ 731 product(bool, PrintCodeCacheOnCompilation, false, \ 732 "Print the code cache memory usage each time a method is " \ 733 "compiled") \ 734 \ 735 diagnostic(bool, PrintStubCode, false, \ 736 "Print generated stub code") \ 737 \ 738 product(bool, StackTraceInThrowable, true, \ 739 "Collect backtrace in throwable when exception happens") \ 740 \ 741 product(bool, OmitStackTraceInFastThrow, true, \ 742 "Omit backtraces for some 'hot' exceptions in optimized code") \ 743 \ 744 product(bool, ProfilerPrintByteCodeStatistics, false, \ 745 "Print bytecode statistics when dumping profiler output") \ 746 \ 747 product(bool, ProfilerRecordPC, false, \ 748 "Collect ticks for each 16 byte interval of compiled code") \ 749 \ 750 product(bool, ProfileVM, false, \ 751 "Profile ticks that fall within VM (either in the VM Thread " \ 752 "or VM code called through stubs)") \ 753 \ 754 product(bool, ProfileIntervals, false, \ 755 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 756 \ 757 notproduct(bool, ProfilerCheckIntervals, false, \ 758 "Collect and print information on spacing of profiler ticks") \ 759 \ 760 product(bool, PrintWarnings, true, \ 761 "Print JVM warnings to output stream") \ 762 \ 763 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 764 "Print warnings for stalled SpinLocks") \ 765 \ 766 product(bool, RegisterFinalizersAtInit, true, \ 767 "Register finalizable objects at end of Object.<init> or " \ 768 "after allocation") \ 769 \ 770 develop(bool, RegisterReferences, true, \ 771 "Tell whether the VM should register soft/weak/final/phantom " \ 772 "references") \ 773 \ 774 develop(bool, IgnoreRewrites, false, \ 775 "Suppress rewrites of bytecodes in the oopmap generator. " \ 776 "This is unsafe!") \ 777 \ 778 develop(bool, PrintCodeCacheExtension, false, \ 779 "Print extension of code cache") \ 780 \ 781 develop(bool, UsePrivilegedStack, true, \ 782 "Enable the security JVM functions") \ 783 \ 784 develop(bool, ProtectionDomainVerification, true, \ 785 "Verify protection domain before resolution in system dictionary")\ 786 \ 787 product(bool, ClassUnloading, true, \ 788 "Do unloading of classes") \ 789 \ 790 product(bool, ClassUnloadingWithConcurrentMark, true, \ 791 "Do unloading of classes with a concurrent marking cycle") \ 792 \ 793 develop(bool, DisableStartThread, false, \ 794 "Disable starting of additional Java threads " \ 795 "(for debugging only)") \ 796 \ 797 develop(bool, MemProfiling, false, \ 798 "Write memory usage profiling to log file") \ 799 \ 800 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 801 "Print the system dictionary at exit") \ 802 \ 803 diagnostic(bool, DynamicallyResizeSystemDictionaries, true, \ 804 "Dynamically resize system dictionaries as needed") \ 805 \ 806 product(bool, AlwaysLockClassLoader, false, \ 807 "Require the VM to acquire the class loader lock before calling " \ 808 "loadClass() even for class loaders registering " \ 809 "as parallel capable") \ 810 \ 811 product(bool, AllowParallelDefineClass, false, \ 812 "Allow parallel defineClass requests for class loaders " \ 813 "registering as parallel capable") \ 814 \ 815 product_pd(bool, DontYieldALot, \ 816 "Throw away obvious excess yield calls") \ 817 \ 818 develop(bool, UseDetachedThreads, true, \ 819 "Use detached threads that are recycled upon termination " \ 820 "(for Solaris only)") \ 821 \ 822 experimental(bool, DisablePrimordialThreadGuardPages, false, \ 823 "Disable the use of stack guard pages if the JVM is loaded " \ 824 "on the primordial process thread") \ 825 \ 826 product(bool, UseLWPSynchronization, true, \ 827 "Use LWP-based instead of libthread-based synchronization " \ 828 "(SPARC only)") \ 829 \ 830 experimental(ccstr, SyncKnobs, NULL, \ 831 "(Unstable) Various monitor synchronization tunables") \ 832 \ 833 experimental(intx, EmitSync, 0, \ 834 "(Unsafe, Unstable) " \ 835 "Control emission of inline sync fast-path code") \ 836 \ 837 product(intx, MonitorBound, 0, "Bound Monitor population") \ 838 range(0, max_jint) \ 839 \ 840 product(bool, MonitorInUseLists, true, "Track Monitors for Deflation") \ 841 \ 842 experimental(intx, MonitorUsedDeflationThreshold, 90, \ 843 "Percentage of used monitors before triggering cleanup " \ 844 "safepoint which deflates monitors (0 is off). " \ 845 "The check is performed on GuaranteedSafepointInterval.") \ 846 range(0, 100) \ 847 \ 848 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 849 "Experimental Sync flags") \ 850 \ 851 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 852 \ 853 experimental(intx, hashCode, 5, \ 854 "(Unstable) select hashCode generation algorithm") \ 855 \ 856 product(bool, FilterSpuriousWakeups, true, \ 857 "When true prevents OS-level spurious, or premature, wakeups " \ 858 "from Object.wait (Ignored for Windows)") \ 859 \ 860 develop(bool, UsePthreads, false, \ 861 "Use pthread-based instead of libthread-based synchronization " \ 862 "(SPARC only)") \ 863 \ 864 product(bool, ReduceSignalUsage, false, \ 865 "Reduce the use of OS signals in Java and/or the VM") \ 866 \ 867 develop_pd(bool, ShareVtableStubs, \ 868 "Share vtable stubs (smaller code but worse branch prediction") \ 869 \ 870 develop(bool, LoadLineNumberTables, true, \ 871 "Tell whether the class file parser loads line number tables") \ 872 \ 873 develop(bool, LoadLocalVariableTables, true, \ 874 "Tell whether the class file parser loads local variable tables") \ 875 \ 876 develop(bool, LoadLocalVariableTypeTables, true, \ 877 "Tell whether the class file parser loads local variable type" \ 878 "tables") \ 879 \ 880 product(bool, AllowUserSignalHandlers, false, \ 881 "Do not complain if the application installs signal handlers " \ 882 "(Solaris & Linux only)") \ 883 \ 884 product(bool, UseSignalChaining, true, \ 885 "Use signal-chaining to invoke signal handlers installed " \ 886 "by the application (Solaris & Linux only)") \ 887 \ 888 product(bool, AllowJNIEnvProxy, false, \ 889 "Allow JNIEnv proxies for jdbx") \ 890 \ 891 product(bool, RestoreMXCSROnJNICalls, false, \ 892 "Restore MXCSR when returning from JNI calls") \ 893 \ 894 product(bool, CheckJNICalls, false, \ 895 "Verify all arguments to JNI calls") \ 896 \ 897 product(bool, UseFastJNIAccessors, true, \ 898 "Use optimized versions of Get<Primitive>Field") \ 899 \ 900 product(intx, MaxJNILocalCapacity, 65536, \ 901 "Maximum allowable local JNI handle capacity to " \ 902 "EnsureLocalCapacity() and PushLocalFrame(), " \ 903 "where <= 0 is unlimited, default: 65536") \ 904 range(min_intx, max_intx) \ 905 \ 906 product(bool, EagerXrunInit, false, \ 907 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 908 "but not all -Xrun libraries may support the state of the VM " \ 909 "at this time") \ 910 \ 911 product(bool, PreserveAllAnnotations, false, \ 912 "Preserve RuntimeInvisibleAnnotations as well " \ 913 "as RuntimeVisibleAnnotations") \ 914 \ 915 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 916 "Number of OutOfMemoryErrors preallocated with backtrace") \ 917 \ 918 product(bool, UseXMMForArrayCopy, false, \ 919 "Use SSE2 MOVQ instruction for Arraycopy") \ 920 \ 921 product(intx, FieldsAllocationStyle, 1, \ 922 "0 - type based with oops first, " \ 923 "1 - with oops last, " \ 924 "2 - oops in super and sub classes are together") \ 925 range(0, 2) \ 926 \ 927 product(bool, CompactFields, true, \ 928 "Allocate nonstatic fields in gaps between previous fields") \ 929 \ 930 notproduct(bool, PrintFieldLayout, false, \ 931 "Print field layout for each class") \ 932 \ 933 notproduct(bool, PrintValueLayout, false, \ 934 "Print field layout for each value type") \ 935 \ 936 notproduct(bool, PrintValueArrayLayout, false, \ 937 "Print array layout for each value type array") \ 938 \ 939 product(bool, ValueArrayFlatten, true, \ 940 "Flatten value array elements, if possible") \ 941 \ 942 product(intx, ValueArrayElemMaxFlatSize, -1, \ 943 "Max size for flattening value array elements, <0 no limit") \ 944 \ 945 product(intx, ValueFieldMaxFlatSize, 128, \ 946 "Max size for flattening value type fields, <0 no limit") \ 947 \ 948 product(intx, ValueArrayElemMaxFlatOops, 4, \ 949 "Max nof embedded object references in a value type to flatten, <0 no limit") \ 950 \ 951 product(bool, ValueArrayAtomicAccess, false, \ 952 "Atomic value array accesses by-default, for all value arrays") \ 953 \ 954 /* Need to limit the extent of the padding to reasonable size. */\ 955 /* 8K is well beyond the reasonable HW cache line size, even with */\ 956 /* aggressive prefetching, while still leaving the room for segregating */\ 957 /* among the distinct pages. */\ 958 product(intx, ContendedPaddingWidth, 128, \ 959 "How many bytes to pad the fields/classes marked @Contended with")\ 960 range(0, 8192) \ 961 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 962 \ 963 product(bool, EnableContended, true, \ 964 "Enable @Contended annotation support") \ 965 \ 966 product(bool, RestrictContended, true, \ 967 "Restrict @Contended to trusted classes") \ 968 \ 969 product(bool, UseBiasedLocking, true, \ 970 "Enable biased locking in JVM") \ 971 \ 972 product(intx, BiasedLockingStartupDelay, 0, \ 973 "Number of milliseconds to wait before enabling biased locking") \ 974 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 975 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 976 \ 977 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 978 "Print statistics of biased locking in JVM") \ 979 \ 980 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 981 "Threshold of number of revocations per type to try to " \ 982 "rebias all objects in the heap of that type") \ 983 range(0, max_intx) \ 984 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 985 \ 986 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 987 "Threshold of number of revocations per type to permanently " \ 988 "revoke biases of all objects in the heap of that type") \ 989 range(0, max_intx) \ 990 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 991 \ 992 product(intx, BiasedLockingDecayTime, 25000, \ 993 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 994 "type after previous bulk rebias") \ 995 range(500, max_intx) \ 996 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 997 \ 998 product(bool, ExitOnOutOfMemoryError, false, \ 999 "JVM exits on the first occurrence of an out-of-memory error") \ 1000 \ 1001 product(bool, CrashOnOutOfMemoryError, false, \ 1002 "JVM aborts, producing an error log and core/mini dump, on the " \ 1003 "first occurrence of an out-of-memory error") \ 1004 \ 1005 /* tracing */ \ 1006 \ 1007 develop(bool, StressRewriter, false, \ 1008 "Stress linktime bytecode rewriting") \ 1009 \ 1010 product(ccstr, TraceJVMTI, NULL, \ 1011 "Trace flags for JVMTI functions and events") \ 1012 \ 1013 /* This option can change an EMCP method into an obsolete method. */ \ 1014 /* This can affect tests that except specific methods to be EMCP. */ \ 1015 /* This option should be used with caution. */ \ 1016 product(bool, StressLdcRewrite, false, \ 1017 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1018 \ 1019 /* change to false by default sometime after Mustang */ \ 1020 product(bool, VerifyMergedCPBytecodes, true, \ 1021 "Verify bytecodes after RedefineClasses constant pool merging") \ 1022 \ 1023 develop(bool, TraceBytecodes, false, \ 1024 "Trace bytecode execution") \ 1025 \ 1026 develop(bool, TraceICs, false, \ 1027 "Trace inline cache changes") \ 1028 \ 1029 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1030 "Trace method invocation counter overflow") \ 1031 \ 1032 develop(bool, TraceInlineCacheClearing, false, \ 1033 "Trace clearing of inline caches in nmethods") \ 1034 \ 1035 develop(bool, TraceDependencies, false, \ 1036 "Trace dependencies") \ 1037 \ 1038 develop(bool, VerifyDependencies, trueInDebug, \ 1039 "Exercise and verify the compilation dependency mechanism") \ 1040 \ 1041 develop(bool, TraceNewOopMapGeneration, false, \ 1042 "Trace OopMapGeneration") \ 1043 \ 1044 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1045 "Trace OopMapGeneration: print detailed cell states") \ 1046 \ 1047 develop(bool, TimeOopMap, false, \ 1048 "Time calls to GenerateOopMap::compute_map() in sum") \ 1049 \ 1050 develop(bool, TimeOopMap2, false, \ 1051 "Time calls to GenerateOopMap::compute_map() individually") \ 1052 \ 1053 develop(bool, TraceOopMapRewrites, false, \ 1054 "Trace rewriting of method oops during oop map generation") \ 1055 \ 1056 develop(bool, TraceICBuffer, false, \ 1057 "Trace usage of IC buffer") \ 1058 \ 1059 develop(bool, TraceCompiledIC, false, \ 1060 "Trace changes of compiled IC") \ 1061 \ 1062 develop(bool, FLSVerifyDictionary, false, \ 1063 "Do lots of (expensive) FLS dictionary verification") \ 1064 \ 1065 \ 1066 notproduct(bool, CheckMemoryInitialization, false, \ 1067 "Check memory initialization") \ 1068 \ 1069 product(uintx, ProcessDistributionStride, 4, \ 1070 "Stride through processors when distributing processes") \ 1071 range(0, max_juint) \ 1072 \ 1073 develop(bool, TraceFinalizerRegistration, false, \ 1074 "Trace registration of final references") \ 1075 \ 1076 product(bool, IgnoreEmptyClassPaths, false, \ 1077 "Ignore empty path elements in -classpath") \ 1078 \ 1079 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 1080 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 1081 "Initial size of the boot class loader data metaspace") \ 1082 range(30*K, max_uintx/BytesPerWord) \ 1083 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 1084 \ 1085 product(bool, PrintHeapAtSIGBREAK, true, \ 1086 "Print heap layout in response to SIGBREAK") \ 1087 \ 1088 manageable(bool, PrintClassHistogram, false, \ 1089 "Print a histogram of class instances") \ 1090 \ 1091 develop(bool, IgnoreLibthreadGPFault, false, \ 1092 "Suppress workaround for libthread GP fault") \ 1093 \ 1094 experimental(double, ObjectCountCutOffPercent, 0.5, \ 1095 "The percentage of the used heap that the instances of a class " \ 1096 "must occupy for the class to generate a trace event") \ 1097 range(0.0, 100.0) \ 1098 \ 1099 /* JVMTI heap profiling */ \ 1100 \ 1101 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 1102 "Trace JVMTI object tagging calls") \ 1103 \ 1104 diagnostic(bool, VerifyBeforeIteration, false, \ 1105 "Verify memory system before JVMTI iteration") \ 1106 \ 1107 /* compiler interface */ \ 1108 \ 1109 develop(bool, CIPrintCompilerName, false, \ 1110 "when CIPrint is active, print the name of the active compiler") \ 1111 \ 1112 diagnostic(bool, CIPrintCompileQueue, false, \ 1113 "display the contents of the compile queue whenever a " \ 1114 "compilation is enqueued") \ 1115 \ 1116 develop(bool, CIPrintRequests, false, \ 1117 "display every request for compilation") \ 1118 \ 1119 product(bool, CITime, false, \ 1120 "collect timing information for compilation") \ 1121 \ 1122 develop(bool, CITimeVerbose, false, \ 1123 "be more verbose in compilation timings") \ 1124 \ 1125 develop(bool, CITimeEach, false, \ 1126 "display timing information after each successful compilation") \ 1127 \ 1128 develop(bool, CICountOSR, false, \ 1129 "use a separate counter when assigning ids to osr compilations") \ 1130 \ 1131 develop(bool, CICompileNatives, true, \ 1132 "compile native methods if supported by the compiler") \ 1133 \ 1134 develop_pd(bool, CICompileOSR, \ 1135 "compile on stack replacement methods if supported by the " \ 1136 "compiler") \ 1137 \ 1138 develop(bool, CIPrintMethodCodes, false, \ 1139 "print method bytecodes of the compiled code") \ 1140 \ 1141 develop(bool, CIPrintTypeFlow, false, \ 1142 "print the results of ciTypeFlow analysis") \ 1143 \ 1144 develop(bool, CITraceTypeFlow, false, \ 1145 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 1146 \ 1147 develop(intx, OSROnlyBCI, -1, \ 1148 "OSR only at this bci. Negative values mean exclude that bci") \ 1149 \ 1150 /* compiler */ \ 1151 \ 1152 /* notice: the max range value here is max_jint, not max_intx */ \ 1153 /* because of overflow issue */ \ 1154 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 1155 "Number of compiler threads to run") \ 1156 range(0, max_jint) \ 1157 constraint(CICompilerCountConstraintFunc, AfterErgo) \ 1158 \ 1159 product(bool, UseDynamicNumberOfCompilerThreads, true, \ 1160 "Dynamically choose the number of parallel compiler threads") \ 1161 \ 1162 diagnostic(bool, ReduceNumberOfCompilerThreads, true, \ 1163 "Reduce the number of parallel compiler threads when they " \ 1164 "are not used") \ 1165 \ 1166 diagnostic(bool, TraceCompilerThreads, false, \ 1167 "Trace creation and removal of compiler threads") \ 1168 \ 1169 develop(bool, InjectCompilerCreationFailure, false, \ 1170 "Inject thread creation failures for " \ 1171 "UseDynamicNumberOfCompilerThreads") \ 1172 \ 1173 product(intx, CompilationPolicyChoice, 0, \ 1174 "which compilation policy (0-2)") \ 1175 range(0, 2) \ 1176 \ 1177 develop(bool, UseStackBanging, true, \ 1178 "use stack banging for stack overflow checks (required for " \ 1179 "proper StackOverflow handling; disable only to measure cost " \ 1180 "of stackbanging)") \ 1181 \ 1182 develop(bool, UseStrictFP, true, \ 1183 "use strict fp if modifier strictfp is set") \ 1184 \ 1185 develop(bool, GenerateSynchronizationCode, true, \ 1186 "generate locking/unlocking code for synchronized methods and " \ 1187 "monitors") \ 1188 \ 1189 develop(bool, GenerateRangeChecks, true, \ 1190 "Generate range checks for array accesses") \ 1191 \ 1192 diagnostic_pd(bool, ImplicitNullChecks, \ 1193 "Generate code for implicit null checks") \ 1194 \ 1195 product_pd(bool, TrapBasedNullChecks, \ 1196 "Generate code for null checks that uses a cmp and trap " \ 1197 "instruction raising SIGTRAP. This is only used if an access to" \ 1198 "null (+offset) will not raise a SIGSEGV, i.e.," \ 1199 "ImplicitNullChecks don't work (PPC64).") \ 1200 \ 1201 diagnostic(bool, EnableThreadSMRExtraValidityChecks, true, \ 1202 "Enable Thread SMR extra validity checks") \ 1203 \ 1204 diagnostic(bool, EnableThreadSMRStatistics, trueInDebug, \ 1205 "Enable Thread SMR Statistics") \ 1206 \ 1207 product(bool, Inline, true, \ 1208 "Enable inlining") \ 1209 \ 1210 product(bool, ClipInlining, true, \ 1211 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 1212 \ 1213 develop(bool, UseCHA, true, \ 1214 "Enable CHA") \ 1215 \ 1216 product(bool, UseTypeProfile, true, \ 1217 "Check interpreter profile for historically monomorphic calls") \ 1218 \ 1219 diagnostic(bool, PrintInlining, false, \ 1220 "Print inlining optimizations") \ 1221 \ 1222 product(bool, UsePopCountInstruction, false, \ 1223 "Use population count instruction") \ 1224 \ 1225 develop(bool, EagerInitialization, false, \ 1226 "Eagerly initialize classes if possible") \ 1227 \ 1228 diagnostic(bool, LogTouchedMethods, false, \ 1229 "Log methods which have been ever touched in runtime") \ 1230 \ 1231 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 1232 "Print all methods that have been ever touched in runtime") \ 1233 \ 1234 develop(bool, TraceMethodReplacement, false, \ 1235 "Print when methods are replaced do to recompilation") \ 1236 \ 1237 develop(bool, PrintMethodFlushing, false, \ 1238 "Print the nmethods being flushed") \ 1239 \ 1240 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 1241 "print statistics about method flushing") \ 1242 \ 1243 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 1244 "Number of compiled code invocations after which " \ 1245 "the method is considered as hot by the flusher") \ 1246 range(1, max_jint) \ 1247 \ 1248 diagnostic(intx, MinPassesBeforeFlush, 10, \ 1249 "Minimum number of sweeper passes before an nmethod " \ 1250 "can be flushed") \ 1251 range(0, max_intx) \ 1252 \ 1253 product(bool, UseCodeAging, true, \ 1254 "Insert counter to detect warm methods") \ 1255 \ 1256 diagnostic(bool, StressCodeAging, false, \ 1257 "Start with counters compiled in") \ 1258 \ 1259 develop(bool, StressCodeBuffers, false, \ 1260 "Exercise code buffer expansion and other rare state changes") \ 1261 \ 1262 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 1263 "Generate extra debugging information for non-safepoints in " \ 1264 "nmethods") \ 1265 \ 1266 product(bool, PrintVMOptions, false, \ 1267 "Print flags that appeared on the command line") \ 1268 \ 1269 product(bool, IgnoreUnrecognizedVMOptions, false, \ 1270 "Ignore unrecognized VM options") \ 1271 \ 1272 product(bool, PrintCommandLineFlags, false, \ 1273 "Print flags specified on command line or set by ergonomics") \ 1274 \ 1275 product(bool, PrintFlagsInitial, false, \ 1276 "Print all VM flags before argument processing and exit VM") \ 1277 \ 1278 product(bool, PrintFlagsFinal, false, \ 1279 "Print all VM flags after argument and ergonomic processing") \ 1280 \ 1281 notproduct(bool, PrintFlagsWithComments, false, \ 1282 "Print all VM flags with default values and descriptions and " \ 1283 "exit") \ 1284 \ 1285 product(bool, PrintFlagsRanges, false, \ 1286 "Print VM flags and their ranges and exit VM") \ 1287 \ 1288 diagnostic(bool, SerializeVMOutput, true, \ 1289 "Use a mutex to serialize output to tty and LogFile") \ 1290 \ 1291 diagnostic(bool, DisplayVMOutput, true, \ 1292 "Display all VM output on the tty, independently of LogVMOutput") \ 1293 \ 1294 diagnostic(bool, LogVMOutput, false, \ 1295 "Save VM output to LogFile") \ 1296 \ 1297 diagnostic(ccstr, LogFile, NULL, \ 1298 "If LogVMOutput or LogCompilation is on, save VM output to " \ 1299 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 1300 \ 1301 product(ccstr, ErrorFile, NULL, \ 1302 "If an error occurs, save the error data to this file " \ 1303 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 1304 \ 1305 product(bool, DisplayVMOutputToStderr, false, \ 1306 "If DisplayVMOutput is true, display all VM output to stderr") \ 1307 \ 1308 product(bool, DisplayVMOutputToStdout, false, \ 1309 "If DisplayVMOutput is true, display all VM output to stdout") \ 1310 \ 1311 product(bool, UseHeavyMonitors, false, \ 1312 "use heavyweight instead of lightweight Java monitors") \ 1313 \ 1314 product(bool, PrintStringTableStatistics, false, \ 1315 "print statistics about the StringTable and SymbolTable") \ 1316 \ 1317 diagnostic(bool, VerifyStringTableAtExit, false, \ 1318 "verify StringTable contents at exit") \ 1319 \ 1320 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 1321 "print histogram of the symbol table") \ 1322 \ 1323 notproduct(bool, ExitVMOnVerifyError, false, \ 1324 "standard exit from VM if bytecode verify error " \ 1325 "(only in debug mode)") \ 1326 \ 1327 diagnostic(ccstr, AbortVMOnException, NULL, \ 1328 "Call fatal if this exception is thrown. Example: " \ 1329 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 1330 \ 1331 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 1332 "Call fatal if the exception pointed by AbortVMOnException " \ 1333 "has this message") \ 1334 \ 1335 develop(bool, DebugVtables, false, \ 1336 "add debugging code to vtable dispatch") \ 1337 \ 1338 notproduct(bool, PrintVtableStats, false, \ 1339 "print vtables stats at end of run") \ 1340 \ 1341 develop(bool, TraceCreateZombies, false, \ 1342 "trace creation of zombie nmethods") \ 1343 \ 1344 notproduct(bool, IgnoreLockingAssertions, false, \ 1345 "disable locking assertions (for speed)") \ 1346 \ 1347 product(bool, RangeCheckElimination, true, \ 1348 "Eliminate range checks") \ 1349 \ 1350 develop_pd(bool, UncommonNullCast, \ 1351 "track occurrences of null in casts; adjust compiler tactics") \ 1352 \ 1353 develop(bool, TypeProfileCasts, true, \ 1354 "treat casts like calls for purposes of type profiling") \ 1355 \ 1356 develop(bool, DelayCompilationDuringStartup, true, \ 1357 "Delay invoking the compiler until main application class is " \ 1358 "loaded") \ 1359 \ 1360 develop(bool, CompileTheWorld, false, \ 1361 "Compile all methods in all classes in bootstrap class path " \ 1362 "(stress test)") \ 1363 \ 1364 develop(bool, CompileTheWorldPreloadClasses, true, \ 1365 "Preload all classes used by a class before start loading") \ 1366 \ 1367 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 1368 "Force a safepoint every n compiles so sweeper can keep up") \ 1369 \ 1370 develop(bool, FillDelaySlots, true, \ 1371 "Fill delay slots (on SPARC only)") \ 1372 \ 1373 develop(bool, TimeLivenessAnalysis, false, \ 1374 "Time computation of bytecode liveness analysis") \ 1375 \ 1376 develop(bool, TraceLivenessGen, false, \ 1377 "Trace the generation of liveness analysis information") \ 1378 \ 1379 notproduct(bool, TraceLivenessQuery, false, \ 1380 "Trace queries of liveness analysis information") \ 1381 \ 1382 notproduct(bool, CollectIndexSetStatistics, false, \ 1383 "Collect information about IndexSets") \ 1384 \ 1385 develop(bool, UseLoopSafepoints, true, \ 1386 "Generate Safepoint nodes in every loop") \ 1387 \ 1388 develop(intx, FastAllocateSizeLimit, 128*K, \ 1389 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 1390 "Inline allocations larger than this in doublewords must go slow")\ 1391 \ 1392 product(bool, AggressiveOpts, false, \ 1393 "(Deprecated) Enable aggressive optimizations - see arguments.cpp") \ 1394 \ 1395 product_pd(bool, CompactStrings, \ 1396 "Enable Strings to use single byte chars in backing store") \ 1397 \ 1398 product_pd(uintx, TypeProfileLevel, \ 1399 "=XYZ, with Z: Type profiling of arguments at call; " \ 1400 "Y: Type profiling of return value at call; " \ 1401 "X: Type profiling of parameters to methods; " \ 1402 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 1403 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 1404 \ 1405 product(intx, TypeProfileArgsLimit, 2, \ 1406 "max number of call arguments to consider for type profiling") \ 1407 range(0, 16) \ 1408 \ 1409 product(intx, TypeProfileParmsLimit, 2, \ 1410 "max number of incoming parameters to consider for type profiling"\ 1411 ", -1 for all") \ 1412 range(-1, 64) \ 1413 \ 1414 /* statistics */ \ 1415 develop(bool, CountCompiledCalls, false, \ 1416 "Count method invocations") \ 1417 \ 1418 notproduct(bool, CountRuntimeCalls, false, \ 1419 "Count VM runtime calls") \ 1420 \ 1421 develop(bool, CountJNICalls, false, \ 1422 "Count jni method invocations") \ 1423 \ 1424 notproduct(bool, CountJVMCalls, false, \ 1425 "Count jvm method invocations") \ 1426 \ 1427 notproduct(bool, CountRemovableExceptions, false, \ 1428 "Count exceptions that could be replaced by branches due to " \ 1429 "inlining") \ 1430 \ 1431 notproduct(bool, ICMissHistogram, false, \ 1432 "Produce histogram of IC misses") \ 1433 \ 1434 /* interpreter */ \ 1435 product_pd(bool, RewriteBytecodes, \ 1436 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 1437 \ 1438 product_pd(bool, RewriteFrequentPairs, \ 1439 "Rewrite frequently used bytecode pairs into a single bytecode") \ 1440 \ 1441 diagnostic(bool, PrintInterpreter, false, \ 1442 "Print the generated interpreter code") \ 1443 \ 1444 product(bool, UseInterpreter, true, \ 1445 "Use interpreter for non-compiled methods") \ 1446 \ 1447 develop(bool, UseFastSignatureHandlers, true, \ 1448 "Use fast signature handlers for native calls") \ 1449 \ 1450 product(bool, UseLoopCounter, true, \ 1451 "Increment invocation counter on backward branch") \ 1452 \ 1453 product_pd(bool, UseOnStackReplacement, \ 1454 "Use on stack replacement, calls runtime if invoc. counter " \ 1455 "overflows in loop") \ 1456 \ 1457 notproduct(bool, TraceOnStackReplacement, false, \ 1458 "Trace on stack replacement") \ 1459 \ 1460 product_pd(bool, PreferInterpreterNativeStubs, \ 1461 "Use always interpreter stubs for native methods invoked via " \ 1462 "interpreter") \ 1463 \ 1464 develop(bool, CountBytecodes, false, \ 1465 "Count number of bytecodes executed") \ 1466 \ 1467 develop(bool, PrintBytecodeHistogram, false, \ 1468 "Print histogram of the executed bytecodes") \ 1469 \ 1470 develop(bool, PrintBytecodePairHistogram, false, \ 1471 "Print histogram of the executed bytecode pairs") \ 1472 \ 1473 diagnostic(bool, PrintSignatureHandlers, false, \ 1474 "Print code generated for native method signature handlers") \ 1475 \ 1476 develop(bool, VerifyOops, false, \ 1477 "Do plausibility checks for oops") \ 1478 \ 1479 develop(bool, CheckUnhandledOops, false, \ 1480 "Check for unhandled oops in VM code") \ 1481 \ 1482 develop(bool, VerifyJNIFields, trueInDebug, \ 1483 "Verify jfieldIDs for instance fields") \ 1484 \ 1485 notproduct(bool, VerifyJNIEnvThread, false, \ 1486 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 1487 "from JNI") \ 1488 \ 1489 develop(bool, VerifyFPU, false, \ 1490 "Verify FPU state (check for NaN's, etc.)") \ 1491 \ 1492 develop(bool, VerifyThread, false, \ 1493 "Watch the thread register for corruption (SPARC only)") \ 1494 \ 1495 develop(bool, VerifyActivationFrameSize, false, \ 1496 "Verify that activation frame didn't become smaller than its " \ 1497 "minimal size") \ 1498 \ 1499 develop(bool, TraceFrequencyInlining, false, \ 1500 "Trace frequency based inlining") \ 1501 \ 1502 develop_pd(bool, InlineIntrinsics, \ 1503 "Inline intrinsics that can be statically resolved") \ 1504 \ 1505 product_pd(bool, ProfileInterpreter, \ 1506 "Profile at the bytecode level during interpretation") \ 1507 \ 1508 develop(bool, TraceProfileInterpreter, false, \ 1509 "Trace profiling at the bytecode level during interpretation. " \ 1510 "This outputs the profiling information collected to improve " \ 1511 "jit compilation.") \ 1512 \ 1513 develop_pd(bool, ProfileTraps, \ 1514 "Profile deoptimization traps at the bytecode level") \ 1515 \ 1516 product(intx, ProfileMaturityPercentage, 20, \ 1517 "number of method invocations/branches (expressed as % of " \ 1518 "CompileThreshold) before using the method's profile") \ 1519 range(0, 100) \ 1520 \ 1521 diagnostic(bool, PrintMethodData, false, \ 1522 "Print the results of +ProfileInterpreter at end of run") \ 1523 \ 1524 develop(bool, VerifyDataPointer, trueInDebug, \ 1525 "Verify the method data pointer during interpreter profiling") \ 1526 \ 1527 develop(bool, VerifyCompiledCode, false, \ 1528 "Include miscellaneous runtime verifications in nmethod code; " \ 1529 "default off because it disturbs nmethod size heuristics") \ 1530 \ 1531 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 1532 "Manually make GC thread crash then dump java stack trace; " \ 1533 "Test only") \ 1534 \ 1535 /* compilation */ \ 1536 product(bool, UseCompiler, true, \ 1537 "Use Just-In-Time compilation") \ 1538 \ 1539 develop(bool, TraceCompilationPolicy, false, \ 1540 "Trace compilation policy") \ 1541 \ 1542 develop(bool, TimeCompilationPolicy, false, \ 1543 "Time the compilation policy") \ 1544 \ 1545 product(bool, UseCounterDecay, true, \ 1546 "Adjust recompilation counters") \ 1547 \ 1548 develop(intx, CounterHalfLifeTime, 30, \ 1549 "Half-life time of invocation counters (in seconds)") \ 1550 \ 1551 develop(intx, CounterDecayMinIntervalLength, 500, \ 1552 "The minimum interval (in milliseconds) between invocation of " \ 1553 "CounterDecay") \ 1554 \ 1555 product(bool, AlwaysCompileLoopMethods, false, \ 1556 "When using recompilation, never interpret methods " \ 1557 "containing loops") \ 1558 \ 1559 product(bool, DontCompileHugeMethods, true, \ 1560 "Do not compile methods > HugeMethodLimit") \ 1561 \ 1562 /* Bytecode escape analysis estimation. */ \ 1563 product(bool, EstimateArgEscape, true, \ 1564 "Analyze bytecodes to estimate escape state of arguments") \ 1565 \ 1566 product(intx, BCEATraceLevel, 0, \ 1567 "How much tracing to do of bytecode escape analysis estimates " \ 1568 "(0-3)") \ 1569 range(0, 3) \ 1570 \ 1571 product(intx, MaxBCEAEstimateLevel, 5, \ 1572 "Maximum number of nested calls that are analyzed by BC EA") \ 1573 range(0, max_jint) \ 1574 \ 1575 product(intx, MaxBCEAEstimateSize, 150, \ 1576 "Maximum bytecode size of a method to be analyzed by BC EA") \ 1577 range(0, max_jint) \ 1578 \ 1579 product(intx, AllocatePrefetchStyle, 1, \ 1580 "0 = no prefetch, " \ 1581 "1 = generate prefetch instructions for each allocation, " \ 1582 "2 = use TLAB watermark to gate allocation prefetch, " \ 1583 "3 = generate one prefetch instruction per cache line") \ 1584 range(0, 3) \ 1585 \ 1586 product(intx, AllocatePrefetchDistance, -1, \ 1587 "Distance to prefetch ahead of allocation pointer. " \ 1588 "-1: use system-specific value (automatically determined") \ 1589 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 1590 \ 1591 product(intx, AllocatePrefetchLines, 3, \ 1592 "Number of lines to prefetch ahead of array allocation pointer") \ 1593 range(1, 64) \ 1594 \ 1595 product(intx, AllocateInstancePrefetchLines, 1, \ 1596 "Number of lines to prefetch ahead of instance allocation " \ 1597 "pointer") \ 1598 range(1, 64) \ 1599 \ 1600 product(intx, AllocatePrefetchStepSize, 16, \ 1601 "Step size in bytes of sequential prefetch instructions") \ 1602 range(1, 512) \ 1603 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 1604 \ 1605 product(intx, AllocatePrefetchInstr, 0, \ 1606 "Select instruction to prefetch ahead of allocation pointer") \ 1607 constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit) \ 1608 \ 1609 /* deoptimization */ \ 1610 develop(bool, TraceDeoptimization, false, \ 1611 "Trace deoptimization") \ 1612 \ 1613 develop(bool, PrintDeoptimizationDetails, false, \ 1614 "Print more information about deoptimization") \ 1615 \ 1616 develop(bool, DebugDeoptimization, false, \ 1617 "Tracing various information while debugging deoptimization") \ 1618 \ 1619 product(intx, SelfDestructTimer, 0, \ 1620 "Will cause VM to terminate after a given time (in minutes) " \ 1621 "(0 means off)") \ 1622 range(0, max_intx) \ 1623 \ 1624 product(intx, MaxJavaStackTraceDepth, 1024, \ 1625 "The maximum number of lines in the stack trace for Java " \ 1626 "exceptions (0 means all)") \ 1627 range(0, max_jint/2) \ 1628 \ 1629 /* notice: the max range value here is max_jint, not max_intx */ \ 1630 /* because of overflow issue */ \ 1631 diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 1632 "Guarantee a safepoint (at least) every so many milliseconds " \ 1633 "(0 means none)") \ 1634 range(0, max_jint) \ 1635 \ 1636 product(intx, SafepointTimeoutDelay, 10000, \ 1637 "Delay in milliseconds for option SafepointTimeout") \ 1638 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 1639 NOT_LP64(range(0, max_intx)) \ 1640 \ 1641 product(intx, NmethodSweepActivity, 10, \ 1642 "Removes cold nmethods from code cache if > 0. Higher values " \ 1643 "result in more aggressive sweeping") \ 1644 range(0, 2000) \ 1645 \ 1646 notproduct(bool, LogSweeper, false, \ 1647 "Keep a ring buffer of sweeper activity") \ 1648 \ 1649 notproduct(intx, SweeperLogEntries, 1024, \ 1650 "Number of records in the ring buffer of sweeper activity") \ 1651 \ 1652 notproduct(intx, MemProfilingInterval, 500, \ 1653 "Time between each invocation of the MemProfiler") \ 1654 \ 1655 develop(intx, MallocCatchPtr, -1, \ 1656 "Hit breakpoint when mallocing/freeing this pointer") \ 1657 \ 1658 notproduct(ccstrlist, SuppressErrorAt, "", \ 1659 "List of assertions (file:line) to muzzle") \ 1660 \ 1661 develop(intx, StackPrintLimit, 100, \ 1662 "number of stack frames to print in VM-level stack dump") \ 1663 \ 1664 notproduct(intx, MaxElementPrintSize, 256, \ 1665 "maximum number of elements to print") \ 1666 \ 1667 notproduct(intx, MaxSubklassPrintSize, 4, \ 1668 "maximum number of subklasses to print when printing klass") \ 1669 \ 1670 product(intx, MaxInlineLevel, 9, \ 1671 "maximum number of nested calls that are inlined") \ 1672 range(0, max_jint) \ 1673 \ 1674 product(intx, MaxRecursiveInlineLevel, 1, \ 1675 "maximum number of nested recursive calls that are inlined") \ 1676 range(0, max_jint) \ 1677 \ 1678 develop(intx, MaxForceInlineLevel, 100, \ 1679 "maximum number of nested calls that are forced for inlining " \ 1680 "(using CompileCommand or marked w/ @ForceInline)") \ 1681 range(0, max_jint) \ 1682 \ 1683 product_pd(intx, InlineSmallCode, \ 1684 "Only inline already compiled methods if their code size is " \ 1685 "less than this") \ 1686 range(0, max_jint) \ 1687 \ 1688 product(intx, MaxInlineSize, 35, \ 1689 "The maximum bytecode size of a method to be inlined") \ 1690 range(0, max_jint) \ 1691 \ 1692 product_pd(intx, FreqInlineSize, \ 1693 "The maximum bytecode size of a frequent method to be inlined") \ 1694 range(0, max_jint) \ 1695 \ 1696 product(intx, MaxTrivialSize, 6, \ 1697 "The maximum bytecode size of a trivial method to be inlined") \ 1698 range(0, max_jint) \ 1699 \ 1700 product(intx, MinInliningThreshold, 250, \ 1701 "The minimum invocation count a method needs to have to be " \ 1702 "inlined") \ 1703 range(0, max_jint) \ 1704 \ 1705 develop(intx, MethodHistogramCutoff, 100, \ 1706 "The cutoff value for method invocation histogram (+CountCalls)") \ 1707 \ 1708 diagnostic(intx, ProfilerNumberOfInterpretedMethods, 25, \ 1709 "Number of interpreted methods to show in profile") \ 1710 \ 1711 diagnostic(intx, ProfilerNumberOfCompiledMethods, 25, \ 1712 "Number of compiled methods to show in profile") \ 1713 \ 1714 diagnostic(intx, ProfilerNumberOfStubMethods, 25, \ 1715 "Number of stub methods to show in profile") \ 1716 \ 1717 diagnostic(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 1718 "Number of runtime stub nodes to show in profile") \ 1719 \ 1720 product(intx, ProfileIntervalsTicks, 100, \ 1721 "Number of ticks between printing of interval profile " \ 1722 "(+ProfileIntervals)") \ 1723 range(0, max_intx) \ 1724 \ 1725 develop(intx, DontYieldALotInterval, 10, \ 1726 "Interval between which yields will be dropped (milliseconds)") \ 1727 \ 1728 develop(intx, ProfilerPCTickThreshold, 15, \ 1729 "Number of ticks in a PC buckets to be a hotspot") \ 1730 \ 1731 notproduct(intx, DeoptimizeALotInterval, 5, \ 1732 "Number of exits until DeoptimizeALot kicks in") \ 1733 \ 1734 notproduct(intx, ZombieALotInterval, 5, \ 1735 "Number of exits until ZombieALot kicks in") \ 1736 \ 1737 diagnostic(uintx, MallocMaxTestWords, 0, \ 1738 "If non-zero, maximum number of words that malloc/realloc can " \ 1739 "allocate (for testing only)") \ 1740 range(0, max_uintx) \ 1741 \ 1742 product(intx, TypeProfileWidth, 2, \ 1743 "Number of receiver types to record in call/cast profile") \ 1744 range(0, 8) \ 1745 \ 1746 develop(intx, BciProfileWidth, 2, \ 1747 "Number of return bci's to record in ret profile") \ 1748 \ 1749 product(intx, PerMethodRecompilationCutoff, 400, \ 1750 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 1751 range(-1, max_intx) \ 1752 \ 1753 product(intx, PerBytecodeRecompilationCutoff, 200, \ 1754 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 1755 range(-1, max_intx) \ 1756 \ 1757 product(intx, PerMethodTrapLimit, 100, \ 1758 "Limit on traps (of one kind) in a method (includes inlines)") \ 1759 range(0, max_jint) \ 1760 \ 1761 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 1762 "Limit on speculative traps (of one kind) in a method " \ 1763 "(includes inlines)") \ 1764 range(0, max_jint) \ 1765 \ 1766 product(intx, PerBytecodeTrapLimit, 4, \ 1767 "Limit on traps (of one kind) at a particular BCI") \ 1768 range(0, max_jint) \ 1769 \ 1770 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 1771 "Extra method data trap entries for speculation") \ 1772 \ 1773 develop(intx, InlineFrequencyRatio, 20, \ 1774 "Ratio of call site execution to caller method invocation") \ 1775 range(0, max_jint) \ 1776 \ 1777 diagnostic_pd(intx, InlineFrequencyCount, \ 1778 "Count of call site execution necessary to trigger frequent " \ 1779 "inlining") \ 1780 range(0, max_jint) \ 1781 \ 1782 develop(intx, InlineThrowCount, 50, \ 1783 "Force inlining of interpreted methods that throw this often") \ 1784 range(0, max_jint) \ 1785 \ 1786 develop(intx, InlineThrowMaxSize, 200, \ 1787 "Force inlining of throwing methods smaller than this") \ 1788 range(0, max_jint) \ 1789 \ 1790 develop(intx, ProfilerNodeSize, 1024, \ 1791 "Size in K to allocate for the Profile Nodes of each thread") \ 1792 range(0, 1024) \ 1793 \ 1794 product_pd(size_t, MetaspaceSize, \ 1795 "Initial threshold (in bytes) at which a garbage collection " \ 1796 "is done to reduce Metaspace usage") \ 1797 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 1798 \ 1799 product(size_t, MaxMetaspaceSize, max_uintx, \ 1800 "Maximum size of Metaspaces (in bytes)") \ 1801 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 1802 \ 1803 product(size_t, CompressedClassSpaceSize, 1*G, \ 1804 "Maximum size of class area in Metaspace when compressed " \ 1805 "class pointers are used") \ 1806 range(1*M, 3*G) \ 1807 \ 1808 manageable(uintx, MinHeapFreeRatio, 40, \ 1809 "The minimum percentage of heap free after GC to avoid expansion."\ 1810 " For most GCs this applies to the old generation. In G1 and" \ 1811 " ParallelGC it applies to the whole heap.") \ 1812 range(0, 100) \ 1813 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 1814 \ 1815 manageable(uintx, MaxHeapFreeRatio, 70, \ 1816 "The maximum percentage of heap free after GC to avoid shrinking."\ 1817 " For most GCs this applies to the old generation. In G1 and" \ 1818 " ParallelGC it applies to the whole heap.") \ 1819 range(0, 100) \ 1820 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 1821 \ 1822 product(bool, ShrinkHeapInSteps, true, \ 1823 "When disabled, informs the GC to shrink the java heap directly" \ 1824 " to the target size at the next full GC rather than requiring" \ 1825 " smaller steps during multiple full GCs.") \ 1826 \ 1827 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 1828 "Number of milliseconds per MB of free space in the heap") \ 1829 range(0, max_intx) \ 1830 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 1831 \ 1832 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 1833 "The minimum change in heap space due to GC (in bytes)") \ 1834 range(0, max_uintx) \ 1835 \ 1836 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 1837 "The minimum expansion of Metaspace (in bytes)") \ 1838 range(0, max_uintx) \ 1839 \ 1840 product(uintx, MaxMetaspaceFreeRatio, 70, \ 1841 "The maximum percentage of Metaspace free after GC to avoid " \ 1842 "shrinking") \ 1843 range(0, 100) \ 1844 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 1845 \ 1846 product(uintx, MinMetaspaceFreeRatio, 40, \ 1847 "The minimum percentage of Metaspace free after GC to avoid " \ 1848 "expansion") \ 1849 range(0, 99) \ 1850 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 1851 \ 1852 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 1853 "The maximum expansion of Metaspace without full GC (in bytes)") \ 1854 range(0, max_uintx) \ 1855 \ 1856 /* stack parameters */ \ 1857 product_pd(intx, StackYellowPages, \ 1858 "Number of yellow zone (recoverable overflows) pages of size " \ 1859 "4KB. If pages are bigger yellow zone is aligned up.") \ 1860 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 1861 \ 1862 product_pd(intx, StackRedPages, \ 1863 "Number of red zone (unrecoverable overflows) pages of size " \ 1864 "4KB. If pages are bigger red zone is aligned up.") \ 1865 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 1866 \ 1867 product_pd(intx, StackReservedPages, \ 1868 "Number of reserved zone (reserved to annotated methods) pages" \ 1869 " of size 4KB. If pages are bigger reserved zone is aligned up.") \ 1870 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ 1871 \ 1872 product(bool, RestrictReservedStack, true, \ 1873 "Restrict @ReservedStackAccess to trusted classes") \ 1874 \ 1875 /* greater stack shadow pages can't generate instruction to bang stack */ \ 1876 product_pd(intx, StackShadowPages, \ 1877 "Number of shadow zone (for overflow checking) pages of size " \ 1878 "4KB. If pages are bigger shadow zone is aligned up. " \ 1879 "This should exceed the depth of the VM and native call stack.") \ 1880 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 1881 \ 1882 product_pd(intx, ThreadStackSize, \ 1883 "Thread Stack Size (in Kbytes)") \ 1884 range(0, 1 * M) \ 1885 \ 1886 product_pd(intx, VMThreadStackSize, \ 1887 "Non-Java Thread Stack Size (in Kbytes)") \ 1888 range(0, max_intx/(1 * K)) \ 1889 \ 1890 product_pd(intx, CompilerThreadStackSize, \ 1891 "Compiler Thread Stack Size (in Kbytes)") \ 1892 range(0, max_intx/(1 * K)) \ 1893 \ 1894 develop_pd(size_t, JVMInvokeMethodSlack, \ 1895 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 1896 \ 1897 /* code cache parameters */ \ 1898 develop_pd(uintx, CodeCacheSegmentSize, \ 1899 "Code cache segment size (in bytes) - smallest unit of " \ 1900 "allocation") \ 1901 range(1, 1024) \ 1902 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 1903 \ 1904 develop_pd(intx, CodeEntryAlignment, \ 1905 "Code entry alignment for generated code (in bytes)") \ 1906 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 1907 \ 1908 product_pd(intx, OptoLoopAlignment, \ 1909 "Align inner loops to zero relative to this modulus") \ 1910 range(1, 16) \ 1911 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 1912 \ 1913 product_pd(uintx, InitialCodeCacheSize, \ 1914 "Initial code cache size (in bytes)") \ 1915 range(os::vm_page_size(), max_uintx) \ 1916 \ 1917 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 1918 "Minimum code cache size (in bytes) required to start VM.") \ 1919 range(0, max_uintx) \ 1920 \ 1921 product(bool, SegmentedCodeCache, false, \ 1922 "Use a segmented code cache") \ 1923 \ 1924 product_pd(uintx, ReservedCodeCacheSize, \ 1925 "Reserved code cache size (in bytes) - maximum code cache size") \ 1926 range(os::vm_page_size(), max_uintx) \ 1927 \ 1928 product_pd(uintx, NonProfiledCodeHeapSize, \ 1929 "Size of code heap with non-profiled methods (in bytes)") \ 1930 range(0, max_uintx) \ 1931 \ 1932 product_pd(uintx, ProfiledCodeHeapSize, \ 1933 "Size of code heap with profiled methods (in bytes)") \ 1934 range(0, max_uintx) \ 1935 \ 1936 product_pd(uintx, NonNMethodCodeHeapSize, \ 1937 "Size of code heap with non-nmethods (in bytes)") \ 1938 range(os::vm_page_size(), max_uintx) \ 1939 \ 1940 product_pd(uintx, CodeCacheExpansionSize, \ 1941 "Code cache expansion size (in bytes)") \ 1942 range(32*K, max_uintx) \ 1943 \ 1944 diagnostic_pd(uintx, CodeCacheMinBlockLength, \ 1945 "Minimum number of segments in a code cache block") \ 1946 range(1, 100) \ 1947 \ 1948 notproduct(bool, ExitOnFullCodeCache, false, \ 1949 "Exit the VM if we fill the code cache") \ 1950 \ 1951 product(bool, UseCodeCacheFlushing, true, \ 1952 "Remove cold/old nmethods from the code cache") \ 1953 \ 1954 product(uintx, StartAggressiveSweepingAt, 10, \ 1955 "Start aggressive sweeping if X[%] of the code cache is free." \ 1956 "Segmented code cache: X[%] of the non-profiled heap." \ 1957 "Non-segmented code cache: X[%] of the total code cache") \ 1958 range(0, 100) \ 1959 \ 1960 /* AOT parameters */ \ 1961 product(bool, UseAOT, AOT_ONLY(true) NOT_AOT(false), \ 1962 "Use AOT compiled files") \ 1963 \ 1964 product(ccstrlist, AOTLibrary, NULL, \ 1965 "AOT library") \ 1966 \ 1967 product(bool, PrintAOT, false, \ 1968 "Print used AOT klasses and methods") \ 1969 \ 1970 notproduct(bool, PrintAOTStatistics, false, \ 1971 "Print AOT statistics") \ 1972 \ 1973 diagnostic(bool, UseAOTStrictLoading, false, \ 1974 "Exit the VM if any of the AOT libraries has invalid config") \ 1975 \ 1976 product(bool, CalculateClassFingerprint, false, \ 1977 "Calculate class fingerprint") \ 1978 \ 1979 /* interpreter debugging */ \ 1980 develop(intx, BinarySwitchThreshold, 5, \ 1981 "Minimal number of lookupswitch entries for rewriting to binary " \ 1982 "switch") \ 1983 \ 1984 develop(intx, StopInterpreterAt, 0, \ 1985 "Stop interpreter execution at specified bytecode number") \ 1986 \ 1987 develop(intx, TraceBytecodesAt, 0, \ 1988 "Trace bytecodes starting with specified bytecode number") \ 1989 \ 1990 /* compiler interface */ \ 1991 develop(intx, CIStart, 0, \ 1992 "The id of the first compilation to permit") \ 1993 \ 1994 develop(intx, CIStop, max_jint, \ 1995 "The id of the last compilation to permit") \ 1996 \ 1997 develop(intx, CIStartOSR, 0, \ 1998 "The id of the first osr compilation to permit " \ 1999 "(CICountOSR must be on)") \ 2000 \ 2001 develop(intx, CIStopOSR, max_jint, \ 2002 "The id of the last osr compilation to permit " \ 2003 "(CICountOSR must be on)") \ 2004 \ 2005 develop(intx, CIBreakAtOSR, -1, \ 2006 "The id of osr compilation to break at") \ 2007 \ 2008 develop(intx, CIBreakAt, -1, \ 2009 "The id of compilation to break at") \ 2010 \ 2011 product(ccstrlist, CompileOnly, "", \ 2012 "List of methods (pkg/class.name) to restrict compilation to") \ 2013 \ 2014 product(ccstr, CompileCommandFile, NULL, \ 2015 "Read compiler commands from this file [.hotspot_compiler]") \ 2016 \ 2017 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 2018 "Read compiler directives from this file") \ 2019 \ 2020 product(ccstrlist, CompileCommand, "", \ 2021 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 2022 \ 2023 develop(bool, ReplayCompiles, false, \ 2024 "Enable replay of compilations from ReplayDataFile") \ 2025 \ 2026 product(ccstr, ReplayDataFile, NULL, \ 2027 "File containing compilation replay information" \ 2028 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 2029 \ 2030 product(ccstr, InlineDataFile, NULL, \ 2031 "File containing inlining replay information" \ 2032 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 2033 \ 2034 develop(intx, ReplaySuppressInitializers, 2, \ 2035 "Control handling of class initialization during replay: " \ 2036 "0 - don't do anything special; " \ 2037 "1 - treat all class initializers as empty; " \ 2038 "2 - treat class initializers for application classes as empty; " \ 2039 "3 - allow all class initializers to run during bootstrap but " \ 2040 " pretend they are empty after starting replay") \ 2041 range(0, 3) \ 2042 \ 2043 develop(bool, ReplayIgnoreInitErrors, false, \ 2044 "Ignore exceptions thrown during initialization for replay") \ 2045 \ 2046 product(bool, DumpReplayDataOnError, true, \ 2047 "Record replay data for crashing compiler threads") \ 2048 \ 2049 product(bool, CICompilerCountPerCPU, false, \ 2050 "1 compiler thread for log(N CPUs)") \ 2051 \ 2052 develop(intx, CIFireOOMAt, -1, \ 2053 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 2054 "(non-negative value throws OOM after this many CI accesses " \ 2055 "in each compile)") \ 2056 notproduct(intx, CICrashAt, -1, \ 2057 "id of compilation to trigger assert in compiler thread for " \ 2058 "the purpose of testing, e.g. generation of replay data") \ 2059 notproduct(bool, CIObjectFactoryVerify, false, \ 2060 "enable potentially expensive verification in ciObjectFactory") \ 2061 \ 2062 /* Priorities */ \ 2063 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 2064 \ 2065 product(intx, ThreadPriorityPolicy, 0, \ 2066 "0 : Normal. "\ 2067 " VM chooses priorities that are appropriate for normal "\ 2068 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 2069 " to normal native priority. Java priorities below " \ 2070 " NORM_PRIORITY map to lower native priority values. On "\ 2071 " Windows applications are allowed to use higher native "\ 2072 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 2073 " not use the highest possible native priority, "\ 2074 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 2075 " system threads. On Linux thread priorities are ignored "\ 2076 " because the OS does not support static priority in "\ 2077 " SCHED_OTHER scheduling class which is the only choice for "\ 2078 " non-root, non-realtime applications. "\ 2079 "1 : Aggressive. "\ 2080 " Java thread priorities map over to the entire range of "\ 2081 " native thread priorities. Higher Java thread priorities map "\ 2082 " to higher native thread priorities. This policy should be "\ 2083 " used with care, as sometimes it can cause performance "\ 2084 " degradation in the application and/or the entire system. On "\ 2085 " Linux this policy requires root privilege.") \ 2086 range(0, 1) \ 2087 \ 2088 product(bool, ThreadPriorityVerbose, false, \ 2089 "Print priority changes") \ 2090 \ 2091 product(intx, CompilerThreadPriority, -1, \ 2092 "The native priority at which compiler threads should run " \ 2093 "(-1 means no change)") \ 2094 range(min_jint, max_jint) \ 2095 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 2096 \ 2097 product(intx, VMThreadPriority, -1, \ 2098 "The native priority at which the VM thread should run " \ 2099 "(-1 means no change)") \ 2100 range(-1, 127) \ 2101 \ 2102 product(intx, JavaPriority1_To_OSPriority, -1, \ 2103 "Map Java priorities to OS priorities") \ 2104 range(-1, 127) \ 2105 \ 2106 product(intx, JavaPriority2_To_OSPriority, -1, \ 2107 "Map Java priorities to OS priorities") \ 2108 range(-1, 127) \ 2109 \ 2110 product(intx, JavaPriority3_To_OSPriority, -1, \ 2111 "Map Java priorities to OS priorities") \ 2112 range(-1, 127) \ 2113 \ 2114 product(intx, JavaPriority4_To_OSPriority, -1, \ 2115 "Map Java priorities to OS priorities") \ 2116 range(-1, 127) \ 2117 \ 2118 product(intx, JavaPriority5_To_OSPriority, -1, \ 2119 "Map Java priorities to OS priorities") \ 2120 range(-1, 127) \ 2121 \ 2122 product(intx, JavaPriority6_To_OSPriority, -1, \ 2123 "Map Java priorities to OS priorities") \ 2124 range(-1, 127) \ 2125 \ 2126 product(intx, JavaPriority7_To_OSPriority, -1, \ 2127 "Map Java priorities to OS priorities") \ 2128 range(-1, 127) \ 2129 \ 2130 product(intx, JavaPriority8_To_OSPriority, -1, \ 2131 "Map Java priorities to OS priorities") \ 2132 range(-1, 127) \ 2133 \ 2134 product(intx, JavaPriority9_To_OSPriority, -1, \ 2135 "Map Java priorities to OS priorities") \ 2136 range(-1, 127) \ 2137 \ 2138 product(intx, JavaPriority10_To_OSPriority,-1, \ 2139 "Map Java priorities to OS priorities") \ 2140 range(-1, 127) \ 2141 \ 2142 experimental(bool, UseCriticalJavaThreadPriority, false, \ 2143 "Java thread priority 10 maps to critical scheduling priority") \ 2144 \ 2145 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 2146 "Compiler thread(s) run at critical scheduling priority") \ 2147 \ 2148 experimental(bool, UseCriticalCMSThreadPriority, false, \ 2149 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 2150 \ 2151 /* compiler debugging */ \ 2152 notproduct(intx, CompileTheWorldStartAt, 1, \ 2153 "First class to consider when using +CompileTheWorld") \ 2154 \ 2155 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 2156 "Last class to consider when using +CompileTheWorld") \ 2157 \ 2158 develop(intx, NewCodeParameter, 0, \ 2159 "Testing Only: Create a dedicated integer parameter before " \ 2160 "putback") \ 2161 \ 2162 /* new oopmap storage allocation */ \ 2163 develop(intx, MinOopMapAllocation, 8, \ 2164 "Minimum number of OopMap entries in an OopMapSet") \ 2165 \ 2166 /* Background Compilation */ \ 2167 develop(intx, LongCompileThreshold, 50, \ 2168 "Used with +TraceLongCompiles") \ 2169 \ 2170 /* recompilation */ \ 2171 product_pd(intx, CompileThreshold, \ 2172 "number of interpreted method invocations before (re-)compiling") \ 2173 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 2174 \ 2175 product(double, CompileThresholdScaling, 1.0, \ 2176 "Factor to control when first compilation happens " \ 2177 "(both with and without tiered compilation): " \ 2178 "values greater than 1.0 delay counter overflow, " \ 2179 "values between 0 and 1.0 rush counter overflow, " \ 2180 "value of 1.0 leaves compilation thresholds unchanged " \ 2181 "value of 0.0 is equivalent to -Xint. " \ 2182 "" \ 2183 "Flag can be set as per-method option. " \ 2184 "If a value is specified for a method, compilation thresholds " \ 2185 "for that method are scaled by both the value of the global flag "\ 2186 "and the value of the per-method flag.") \ 2187 range(0.0, DBL_MAX) \ 2188 \ 2189 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 2190 "Interpreter (tier 0) invocation notification frequency") \ 2191 range(0, 30) \ 2192 \ 2193 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 2194 "C1 without MDO (tier 2) invocation notification frequency") \ 2195 range(0, 30) \ 2196 \ 2197 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 2198 "C1 with MDO profiling (tier 3) invocation notification " \ 2199 "frequency") \ 2200 range(0, 30) \ 2201 \ 2202 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 2203 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 2204 range(0, 30) \ 2205 \ 2206 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 2207 "Interpreter (tier 0) invocation notification frequency") \ 2208 range(0, 30) \ 2209 \ 2210 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 2211 "C1 without MDO (tier 2) invocation notification frequency") \ 2212 range(0, 30) \ 2213 \ 2214 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 2215 "C1 with MDO profiling (tier 3) invocation notification " \ 2216 "frequency") \ 2217 range(0, 30) \ 2218 \ 2219 product(intx, Tier2CompileThreshold, 0, \ 2220 "threshold at which tier 2 compilation is invoked") \ 2221 range(0, max_jint) \ 2222 \ 2223 product(intx, Tier2BackEdgeThreshold, 0, \ 2224 "Back edge threshold at which tier 2 compilation is invoked") \ 2225 range(0, max_jint) \ 2226 \ 2227 product(intx, Tier3InvocationThreshold, 200, \ 2228 "Compile if number of method invocations crosses this " \ 2229 "threshold") \ 2230 range(0, max_jint) \ 2231 \ 2232 product(intx, Tier3MinInvocationThreshold, 100, \ 2233 "Minimum invocation to compile at tier 3") \ 2234 range(0, max_jint) \ 2235 \ 2236 product(intx, Tier3CompileThreshold, 2000, \ 2237 "Threshold at which tier 3 compilation is invoked (invocation " \ 2238 "minimum must be satisfied)") \ 2239 range(0, max_jint) \ 2240 \ 2241 product(intx, Tier3BackEdgeThreshold, 60000, \ 2242 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 2243 range(0, max_jint) \ 2244 \ 2245 product(intx, Tier3AOTInvocationThreshold, 10000, \ 2246 "Compile if number of method invocations crosses this " \ 2247 "threshold if coming from AOT") \ 2248 range(0, max_jint) \ 2249 \ 2250 product(intx, Tier3AOTMinInvocationThreshold, 1000, \ 2251 "Minimum invocation to compile at tier 3 if coming from AOT") \ 2252 range(0, max_jint) \ 2253 \ 2254 product(intx, Tier3AOTCompileThreshold, 15000, \ 2255 "Threshold at which tier 3 compilation is invoked (invocation " \ 2256 "minimum must be satisfied) if coming from AOT") \ 2257 range(0, max_jint) \ 2258 \ 2259 product(intx, Tier3AOTBackEdgeThreshold, 120000, \ 2260 "Back edge threshold at which tier 3 OSR compilation is invoked " \ 2261 "if coming from AOT") \ 2262 range(0, max_jint) \ 2263 \ 2264 product(intx, Tier4InvocationThreshold, 5000, \ 2265 "Compile if number of method invocations crosses this " \ 2266 "threshold") \ 2267 range(0, max_jint) \ 2268 \ 2269 product(intx, Tier4MinInvocationThreshold, 600, \ 2270 "Minimum invocation to compile at tier 4") \ 2271 range(0, max_jint) \ 2272 \ 2273 product(intx, Tier4CompileThreshold, 15000, \ 2274 "Threshold at which tier 4 compilation is invoked (invocation " \ 2275 "minimum must be satisfied") \ 2276 range(0, max_jint) \ 2277 \ 2278 product(intx, Tier4BackEdgeThreshold, 40000, \ 2279 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 2280 range(0, max_jint) \ 2281 \ 2282 product(intx, Tier3DelayOn, 5, \ 2283 "If C2 queue size grows over this amount per compiler thread " \ 2284 "stop compiling at tier 3 and start compiling at tier 2") \ 2285 range(0, max_jint) \ 2286 \ 2287 product(intx, Tier3DelayOff, 2, \ 2288 "If C2 queue size is less than this amount per compiler thread " \ 2289 "allow methods compiled at tier 2 transition to tier 3") \ 2290 range(0, max_jint) \ 2291 \ 2292 product(intx, Tier3LoadFeedback, 5, \ 2293 "Tier 3 thresholds will increase twofold when C1 queue size " \ 2294 "reaches this amount per compiler thread") \ 2295 range(0, max_jint) \ 2296 \ 2297 product(intx, Tier4LoadFeedback, 3, \ 2298 "Tier 4 thresholds will increase twofold when C2 queue size " \ 2299 "reaches this amount per compiler thread") \ 2300 range(0, max_jint) \ 2301 \ 2302 product(intx, TieredCompileTaskTimeout, 50, \ 2303 "Kill compile task if method was not used within " \ 2304 "given timeout in milliseconds") \ 2305 range(0, max_intx) \ 2306 \ 2307 product(intx, TieredStopAtLevel, 4, \ 2308 "Stop at given compilation level") \ 2309 range(0, 4) \ 2310 \ 2311 product(intx, Tier0ProfilingStartPercentage, 200, \ 2312 "Start profiling in interpreter if the counters exceed tier 3 " \ 2313 "thresholds by the specified percentage") \ 2314 range(0, max_jint) \ 2315 \ 2316 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 2317 "Increase the compile threshold for C1 compilation if the code " \ 2318 "cache is filled by the specified percentage") \ 2319 range(0, 99) \ 2320 \ 2321 product(intx, TieredRateUpdateMinTime, 1, \ 2322 "Minimum rate sampling interval (in milliseconds)") \ 2323 range(0, max_intx) \ 2324 \ 2325 product(intx, TieredRateUpdateMaxTime, 25, \ 2326 "Maximum rate sampling interval (in milliseconds)") \ 2327 range(0, max_intx) \ 2328 \ 2329 product_pd(bool, TieredCompilation, \ 2330 "Enable tiered compilation") \ 2331 \ 2332 product(bool, PrintTieredEvents, false, \ 2333 "Print tiered events notifications") \ 2334 \ 2335 product_pd(intx, OnStackReplacePercentage, \ 2336 "NON_TIERED number of method invocations/branches (expressed as " \ 2337 "% of CompileThreshold) before (re-)compiling OSR code") \ 2338 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 2339 \ 2340 product(intx, InterpreterProfilePercentage, 33, \ 2341 "NON_TIERED number of method invocations/branches (expressed as " \ 2342 "% of CompileThreshold) before profiling in the interpreter") \ 2343 range(0, 100) \ 2344 \ 2345 develop(intx, MaxRecompilationSearchLength, 10, \ 2346 "The maximum number of frames to inspect when searching for " \ 2347 "recompilee") \ 2348 \ 2349 develop(intx, MaxInterpretedSearchLength, 3, \ 2350 "The maximum number of interpreted frames to skip when searching "\ 2351 "for recompilee") \ 2352 \ 2353 develop(intx, DesiredMethodLimit, 8000, \ 2354 "The desired maximum method size (in bytecodes) after inlining") \ 2355 \ 2356 develop(intx, HugeMethodLimit, 8000, \ 2357 "Don't compile methods larger than this if " \ 2358 "+DontCompileHugeMethods") \ 2359 \ 2360 /* New JDK 1.4 reflection implementation */ \ 2361 \ 2362 develop(intx, FastSuperclassLimit, 8, \ 2363 "Depth of hardwired instanceof accelerator array") \ 2364 \ 2365 /* Properties for Java libraries */ \ 2366 \ 2367 product(uint64_t, MaxDirectMemorySize, 0, \ 2368 "Maximum total size of NIO direct-buffer allocations") \ 2369 range(0, max_jlong) \ 2370 \ 2371 /* Flags used for temporary code during development */ \ 2372 \ 2373 diagnostic(bool, UseNewCode, false, \ 2374 "Testing Only: Use the new version while testing") \ 2375 \ 2376 diagnostic(bool, UseNewCode2, false, \ 2377 "Testing Only: Use the new version while testing") \ 2378 \ 2379 diagnostic(bool, UseNewCode3, false, \ 2380 "Testing Only: Use the new version while testing") \ 2381 \ 2382 /* flags for performance data collection */ \ 2383 \ 2384 product(bool, UsePerfData, true, \ 2385 "Flag to disable jvmstat instrumentation for performance testing "\ 2386 "and problem isolation purposes") \ 2387 \ 2388 product(bool, PerfDataSaveToFile, false, \ 2389 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 2390 \ 2391 product(ccstr, PerfDataSaveFile, NULL, \ 2392 "Save PerfData memory to the specified absolute pathname. " \ 2393 "The string %p in the file name (if present) " \ 2394 "will be replaced by pid") \ 2395 \ 2396 product(intx, PerfDataSamplingInterval, 50, \ 2397 "Data sampling interval (in milliseconds)") \ 2398 range(PeriodicTask::min_interval, max_jint) \ 2399 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 2400 \ 2401 product(bool, PerfDisableSharedMem, false, \ 2402 "Store performance data in standard memory") \ 2403 \ 2404 product(intx, PerfDataMemorySize, 32*K, \ 2405 "Size of performance data memory region. Will be rounded " \ 2406 "up to a multiple of the native os page size.") \ 2407 range(128, 32*64*K) \ 2408 \ 2409 product(intx, PerfMaxStringConstLength, 1024, \ 2410 "Maximum PerfStringConstant string length before truncation") \ 2411 range(32, 32*K) \ 2412 \ 2413 product(bool, PerfAllowAtExitRegistration, false, \ 2414 "Allow registration of atexit() methods") \ 2415 \ 2416 product(bool, PerfBypassFileSystemCheck, false, \ 2417 "Bypass Win32 file system criteria checks (Windows Only)") \ 2418 \ 2419 product(intx, UnguardOnExecutionViolation, 0, \ 2420 "Unguard page and retry on no-execute fault (Win32 only) " \ 2421 "0=off, 1=conservative, 2=aggressive") \ 2422 range(0, 2) \ 2423 \ 2424 /* Serviceability Support */ \ 2425 \ 2426 product(bool, ManagementServer, false, \ 2427 "Create JMX Management Server") \ 2428 \ 2429 product(bool, DisableAttachMechanism, false, \ 2430 "Disable mechanism that allows tools to attach to this VM") \ 2431 \ 2432 product(bool, StartAttachListener, false, \ 2433 "Always start Attach Listener at VM startup") \ 2434 \ 2435 product(bool, EnableDynamicAgentLoading, true, \ 2436 "Allow tools to load agents with the attach mechanism") \ 2437 \ 2438 manageable(bool, PrintConcurrentLocks, false, \ 2439 "Print java.util.concurrent locks in thread dump") \ 2440 \ 2441 /* Shared spaces */ \ 2442 \ 2443 product(bool, UseSharedSpaces, true, \ 2444 "Use shared spaces for metadata") \ 2445 \ 2446 product(bool, VerifySharedSpaces, false, \ 2447 "Verify shared spaces (false for default archive, true for " \ 2448 "archive specified by -XX:SharedArchiveFile)") \ 2449 \ 2450 product(bool, RequireSharedSpaces, false, \ 2451 "Require shared spaces for metadata") \ 2452 \ 2453 product(bool, DumpSharedSpaces, false, \ 2454 "Special mode: JVM reads a class list, loads classes, builds " \ 2455 "shared spaces, and dumps the shared spaces to a file to be " \ 2456 "used in future JVM runs") \ 2457 \ 2458 product(bool, PrintSharedArchiveAndExit, false, \ 2459 "Print shared archive file contents") \ 2460 \ 2461 product(bool, PrintSharedDictionary, false, \ 2462 "If PrintSharedArchiveAndExit is true, also print the shared " \ 2463 "dictionary") \ 2464 \ 2465 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 2466 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 2467 "Address to allocate shared memory region for class data") \ 2468 range(0, SIZE_MAX) \ 2469 \ 2470 product(ccstr, SharedArchiveConfigFile, NULL, \ 2471 "Data to add to the CDS archive file") \ 2472 \ 2473 product(uintx, SharedSymbolTableBucketSize, 4, \ 2474 "Average number of symbols per bucket in shared table") \ 2475 range(2, 246) \ 2476 \ 2477 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, true, \ 2478 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 2479 "classes. Just exclude them from the shared dictionary.") \ 2480 \ 2481 diagnostic(bool, PrintMethodHandleStubs, false, \ 2482 "Print generated stub code for method handles") \ 2483 \ 2484 develop(bool, TraceMethodHandles, false, \ 2485 "trace internal method handle operations") \ 2486 \ 2487 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 2488 "perform extra checks when constructing method handles") \ 2489 \ 2490 diagnostic(bool, ShowHiddenFrames, false, \ 2491 "show method handle implementation frames (usually hidden)") \ 2492 \ 2493 experimental(bool, TrustFinalNonStaticFields, false, \ 2494 "trust final non-static declarations for constant folding") \ 2495 \ 2496 diagnostic(bool, FoldStableValues, true, \ 2497 "Optimize loads from stable fields (marked w/ @Stable)") \ 2498 \ 2499 develop(bool, TraceInvokeDynamic, false, \ 2500 "trace internal invoke dynamic operations") \ 2501 \ 2502 diagnostic(int, UseBootstrapCallInfo, 1, \ 2503 "0: when resolving InDy or ConDy, force all BSM arguments to be " \ 2504 "resolved before the bootstrap method is called; 1: when a BSM " \ 2505 "that may accept a BootstrapCallInfo is detected, use that API " \ 2506 "to pass BSM arguments, which allows the BSM to delay their " \ 2507 "resolution; 2+: stress test the BCI API by calling more BSMs " \ 2508 "via that API, instead of with the eagerly-resolved array.") \ 2509 \ 2510 diagnostic(bool, PauseAtStartup, false, \ 2511 "Causes the VM to pause at startup time and wait for the pause " \ 2512 "file to be removed (default: ./vm.paused.<pid>)") \ 2513 \ 2514 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 2515 "The file to create and for whose removal to await when pausing " \ 2516 "at startup. (default: ./vm.paused.<pid>)") \ 2517 \ 2518 diagnostic(bool, PauseAtExit, false, \ 2519 "Pause and wait for keypress on exit if a debugger is attached") \ 2520 \ 2521 product(bool, ExtendedDTraceProbes, false, \ 2522 "Enable performance-impacting dtrace probes") \ 2523 \ 2524 product(bool, DTraceMethodProbes, false, \ 2525 "Enable dtrace probes for method-entry and method-exit") \ 2526 \ 2527 product(bool, DTraceAllocProbes, false, \ 2528 "Enable dtrace probes for object allocation") \ 2529 \ 2530 product(bool, DTraceMonitorProbes, false, \ 2531 "Enable dtrace probes for monitor events") \ 2532 \ 2533 product(bool, RelaxAccessControlCheck, false, \ 2534 "Relax the access control checks in the verifier") \ 2535 \ 2536 product(uintx, StringTableSize, defaultStringTableSize, \ 2537 "Number of buckets in the interned String table " \ 2538 "(will be rounded to nearest higher power of 2)") \ 2539 range(minimumStringTableSize, 16777216ul) \ 2540 \ 2541 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 2542 "Number of buckets in the JVM internal Symbol table") \ 2543 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 2544 \ 2545 product(bool, UseStringDeduplication, false, \ 2546 "Use string deduplication") \ 2547 \ 2548 product(uintx, StringDeduplicationAgeThreshold, 3, \ 2549 "A string must reach this age (or be promoted to an old region) " \ 2550 "to be considered for deduplication") \ 2551 range(1, markOopDesc::max_age) \ 2552 \ 2553 diagnostic(bool, StringDeduplicationResizeALot, false, \ 2554 "Force table resize every time the table is scanned") \ 2555 \ 2556 diagnostic(bool, StringDeduplicationRehashALot, false, \ 2557 "Force table rehash every time the table is scanned") \ 2558 \ 2559 diagnostic(bool, WhiteBoxAPI, false, \ 2560 "Enable internal testing APIs") \ 2561 \ 2562 experimental(intx, SurvivorAlignmentInBytes, 0, \ 2563 "Default survivor space alignment in bytes") \ 2564 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 2565 \ 2566 product(ccstr, DumpLoadedClassList, NULL, \ 2567 "Dump the names all loaded classes, that could be stored into " \ 2568 "the CDS archive, in the specified file") \ 2569 \ 2570 product(ccstr, SharedClassListFile, NULL, \ 2571 "Override the default CDS class list") \ 2572 \ 2573 product(ccstr, SharedArchiveFile, NULL, \ 2574 "Override the default location of the CDS archive file") \ 2575 \ 2576 product(ccstr, ExtraSharedClassListFile, NULL, \ 2577 "Extra classlist for building the CDS archive file") \ 2578 \ 2579 experimental(size_t, ArrayAllocatorMallocLimit, \ 2580 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 2581 "Allocation less than this value will be allocated " \ 2582 "using malloc. Larger allocations will use mmap.") \ 2583 \ 2584 experimental(bool, AlwaysAtomicAccesses, false, \ 2585 "Accesses to all variables should always be atomic") \ 2586 \ 2587 diagnostic(bool, UseUnalignedAccesses, false, \ 2588 "Use unaligned memory accesses in Unsafe") \ 2589 \ 2590 product_pd(bool, PreserveFramePointer, \ 2591 "Use the FP register for holding the frame pointer " \ 2592 "and not as a general purpose register.") \ 2593 \ 2594 diagnostic(bool, CheckIntrinsics, true, \ 2595 "When a class C is loaded, check that " \ 2596 "(1) all intrinsics defined by the VM for class C are present "\ 2597 "in the loaded class file and are marked with the " \ 2598 "@HotSpotIntrinsicCandidate annotation, that " \ 2599 "(2) there is an intrinsic registered for all loaded methods " \ 2600 "that are annotated with the @HotSpotIntrinsicCandidate " \ 2601 "annotation, and that " \ 2602 "(3) no orphan methods exist for class C (i.e., methods for " \ 2603 "which the VM declares an intrinsic but that are not declared "\ 2604 "in the loaded class C. " \ 2605 "Check (3) is available only in debug builds.") \ 2606 \ 2607 diagnostic_pd(intx, InitArrayShortSize, \ 2608 "Threshold small size (in bytes) for clearing arrays. " \ 2609 "Anything this size or smaller may get converted to discrete " \ 2610 "scalar stores.") \ 2611 range(0, max_intx) \ 2612 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ 2613 \ 2614 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 2615 "Disable backwards compatibility for compile commands.") \ 2616 \ 2617 diagnostic(bool, CompilerDirectivesPrint, false, \ 2618 "Print compiler directives on installation.") \ 2619 diagnostic(int, CompilerDirectivesLimit, 50, \ 2620 "Limit on number of compiler directives.") \ 2621 \ 2622 product(ccstr, AllocateHeapAt, NULL, \ 2623 "Path to the directoy where a temporary file will be created " \ 2624 "to use as the backing store for Java Heap.") \ 2625 \ 2626 develop(bool, VerifyMetaspace, false, \ 2627 "Verify metaspace on chunk movements.") \ 2628 \ 2629 diagnostic(bool, ShowRegistersOnAssert, false, \ 2630 "On internal errors, include registers in error report.") \ 2631 \ 2632 experimental(bool, UseSwitchProfiling, true, \ 2633 "leverage profiling for table/lookup switch") \ 2634 \ 2635 JFR_ONLY(product(bool, FlightRecorder, false, \ 2636 "Enable Flight Recorder")) \ 2637 \ 2638 JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL, \ 2639 "Flight Recorder options")) \ 2640 \ 2641 JFR_ONLY(product(ccstr, StartFlightRecording, NULL, \ 2642 "Start flight recording with options")) \ 2643 \ 2644 experimental(bool, UseFastUnorderedTimeStamps, false, \ 2645 "Use platform unstable time where supported for timestamps only") \ 2646 \ 2647 product(bool, EnableValhalla, false, \ 2648 "Enable experimental Valhalla features") \ 2649 \ 2650 product_pd(bool, ValueTypePassFieldsAsArgs, \ 2651 "Pass each value type field as an argument at calls") \ 2652 \ 2653 product_pd(bool, ValueTypeReturnedAsFields, \ 2654 "return fields instead of a value type reference") \ 2655 \ 2656 develop(bool, StressValueTypeReturnedAsFields, false, \ 2657 "stress return of fields instead of a value type reference") \ 2658 \ 2659 develop(bool, ScalarizeValueTypes, true, \ 2660 "Scalarize value types in compiled code") \ 2661 \ 2662 product(bool, NullableValueTypes, false, \ 2663 "Treat all value types as nullable") \ 2664 \ 2665 experimental(bool, UsePointerPerturbation, false, \ 2666 "With value types, use the perturbation scheme for acmp") \ 2667 2668 2669 #define VM_FLAGS(develop, \ 2670 develop_pd, \ 2671 product, \ 2672 product_pd, \ 2673 diagnostic, \ 2674 diagnostic_pd, \ 2675 experimental, \ 2676 notproduct, \ 2677 manageable, \ 2678 product_rw, \ 2679 lp64_product, \ 2680 range, \ 2681 constraint, \ 2682 writeable) \ 2683 \ 2684 RUNTIME_FLAGS( \ 2685 develop, \ 2686 develop_pd, \ 2687 product, \ 2688 product_pd, \ 2689 diagnostic, \ 2690 diagnostic_pd, \ 2691 experimental, \ 2692 notproduct, \ 2693 manageable, \ 2694 product_rw, \ 2695 lp64_product, \ 2696 range, \ 2697 constraint, \ 2698 writeable) \ 2699 \ 2700 GC_FLAGS( \ 2701 develop, \ 2702 develop_pd, \ 2703 product, \ 2704 product_pd, \ 2705 diagnostic, \ 2706 diagnostic_pd, \ 2707 experimental, \ 2708 notproduct, \ 2709 manageable, \ 2710 product_rw, \ 2711 lp64_product, \ 2712 range, \ 2713 constraint, \ 2714 writeable) \ 2715 2716 /* 2717 * Macros for factoring of globals 2718 */ 2719 2720 // Interface macros 2721 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2722 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 2723 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 2724 #define DECLARE_PD_DIAGNOSTIC_FLAG(type, name, doc) extern "C" type name; 2725 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 2726 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 2727 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 2728 #ifdef PRODUCT 2729 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 2730 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 2731 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 2732 #else 2733 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 2734 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 2735 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2736 #endif // PRODUCT 2737 // Special LP64 flags, product only needed for now. 2738 #ifdef _LP64 2739 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2740 #else 2741 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 2742 #endif // _LP64 2743 2744 // Implementation macros 2745 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 2746 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 2747 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 2748 #define MATERIALIZE_PD_DIAGNOSTIC_FLAG(type, name, doc) type name = pd_##name; 2749 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 2750 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 2751 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 2752 #ifdef PRODUCT 2753 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 2754 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 2755 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 2756 #else 2757 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 2758 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 2759 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 2760 #endif // PRODUCT 2761 #ifdef _LP64 2762 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 2763 #else 2764 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 2765 #endif // _LP64 2766 2767 // Only materialize src code for range checking when required, ignore otherwise 2768 #define IGNORE_RANGE(a, b) 2769 // Only materialize src code for contraint checking when required, ignore otherwise 2770 #define IGNORE_CONSTRAINT(func,type) 2771 2772 #define IGNORE_WRITEABLE(type) 2773 2774 VM_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2775 DECLARE_PD_DEVELOPER_FLAG, \ 2776 DECLARE_PRODUCT_FLAG, \ 2777 DECLARE_PD_PRODUCT_FLAG, \ 2778 DECLARE_DIAGNOSTIC_FLAG, \ 2779 DECLARE_PD_DIAGNOSTIC_FLAG, \ 2780 DECLARE_EXPERIMENTAL_FLAG, \ 2781 DECLARE_NOTPRODUCT_FLAG, \ 2782 DECLARE_MANAGEABLE_FLAG, \ 2783 DECLARE_PRODUCT_RW_FLAG, \ 2784 DECLARE_LP64_PRODUCT_FLAG, \ 2785 IGNORE_RANGE, \ 2786 IGNORE_CONSTRAINT, \ 2787 IGNORE_WRITEABLE) 2788 2789 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2790 DECLARE_PD_DEVELOPER_FLAG, \ 2791 DECLARE_PRODUCT_FLAG, \ 2792 DECLARE_PD_PRODUCT_FLAG, \ 2793 DECLARE_DIAGNOSTIC_FLAG, \ 2794 DECLARE_PD_DIAGNOSTIC_FLAG, \ 2795 DECLARE_NOTPRODUCT_FLAG, \ 2796 IGNORE_RANGE, \ 2797 IGNORE_CONSTRAINT, \ 2798 IGNORE_WRITEABLE) 2799 2800 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2801 DECLARE_PRODUCT_FLAG, \ 2802 DECLARE_DIAGNOSTIC_FLAG, \ 2803 DECLARE_EXPERIMENTAL_FLAG, \ 2804 DECLARE_NOTPRODUCT_FLAG, \ 2805 IGNORE_RANGE, \ 2806 IGNORE_CONSTRAINT, \ 2807 IGNORE_WRITEABLE) 2808 2809 // Extensions 2810 2811 #include "runtime/globals_ext.hpp" 2812 2813 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP