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 diagnostic(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 product(bool, UseLegacyJNINameEscaping, false, \ 439 "Use the original JNI name escaping scheme") \ 440 \ 441 notproduct(bool, StressCriticalJNINatives, false, \ 442 "Exercise register saving code in critical natives") \ 443 \ 444 diagnostic(bool, UseAESIntrinsics, false, \ 445 "Use intrinsics for AES versions of crypto") \ 446 \ 447 diagnostic(bool, UseAESCTRIntrinsics, false, \ 448 "Use intrinsics for the paralleled version of AES/CTR crypto") \ 449 \ 450 diagnostic(bool, UseSHA1Intrinsics, false, \ 451 "Use intrinsics for SHA-1 crypto hash function. " \ 452 "Requires that UseSHA is enabled.") \ 453 \ 454 diagnostic(bool, UseSHA256Intrinsics, false, \ 455 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 456 "Requires that UseSHA is enabled.") \ 457 \ 458 diagnostic(bool, UseSHA512Intrinsics, false, \ 459 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 460 "Requires that UseSHA is enabled.") \ 461 \ 462 diagnostic(bool, UseCRC32Intrinsics, false, \ 463 "use intrinsics for java.util.zip.CRC32") \ 464 \ 465 diagnostic(bool, UseCRC32CIntrinsics, false, \ 466 "use intrinsics for java.util.zip.CRC32C") \ 467 \ 468 diagnostic(bool, UseAdler32Intrinsics, false, \ 469 "use intrinsics for java.util.zip.Adler32") \ 470 \ 471 diagnostic(bool, UseVectorizedMismatchIntrinsic, false, \ 472 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ 473 \ 474 diagnostic(ccstrlist, DisableIntrinsic, "", \ 475 "do not expand intrinsics whose (internal) names appear here") \ 476 \ 477 develop(bool, TraceCallFixup, false, \ 478 "Trace all call fixups") \ 479 \ 480 develop(bool, DeoptimizeALot, false, \ 481 "Deoptimize at every exit from the runtime system") \ 482 \ 483 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 484 "A comma separated list of bcis to deoptimize at") \ 485 \ 486 product(bool, DeoptimizeRandom, false, \ 487 "Deoptimize random frames on random exit from the runtime system")\ 488 \ 489 notproduct(bool, ZombieALot, false, \ 490 "Create zombies (non-entrant) at exit from the runtime system") \ 491 \ 492 product(bool, UnlinkSymbolsALot, false, \ 493 "Unlink unreferenced symbols from the symbol table at safepoints")\ 494 \ 495 notproduct(bool, WalkStackALot, false, \ 496 "Trace stack (no print) at every exit from the runtime system") \ 497 \ 498 product(bool, Debugging, false, \ 499 "Set when executing debug methods in debug.cpp " \ 500 "(to prevent triggering assertions)") \ 501 \ 502 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 503 "Enable strict checks that safepoints cannot happen for threads " \ 504 "that use NoSafepointVerifier") \ 505 \ 506 notproduct(bool, VerifyLastFrame, false, \ 507 "Verify oops on last frame on entry to VM") \ 508 \ 509 product(bool, FailOverToOldVerifier, true, \ 510 "Fail over to old verifier when split verifier fails") \ 511 \ 512 product(bool, SafepointTimeout, false, \ 513 "Time out and warn or fail after SafepointTimeoutDelay " \ 514 "milliseconds if failed to reach safepoint") \ 515 \ 516 diagnostic(bool, AbortVMOnSafepointTimeout, false, \ 517 "Abort upon failure to reach safepoint (see SafepointTimeout)") \ 518 \ 519 diagnostic(bool, AbortVMOnVMOperationTimeout, false, \ 520 "Abort upon failure to complete VM operation promptly") \ 521 \ 522 diagnostic(intx, AbortVMOnVMOperationTimeoutDelay, 1000, \ 523 "Delay in milliseconds for option AbortVMOnVMOperationTimeout") \ 524 range(0, max_intx) \ 525 \ 526 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 527 /* typically, at most a few retries are needed */ \ 528 product(intx, SuspendRetryCount, 50, \ 529 "Maximum retry count for an external suspend request") \ 530 range(0, max_intx) \ 531 \ 532 product(intx, SuspendRetryDelay, 5, \ 533 "Milliseconds to delay per retry (* current_retry_count)") \ 534 range(0, max_intx) \ 535 \ 536 product(bool, AssertOnSuspendWaitFailure, false, \ 537 "Assert/Guarantee on external suspend wait failure") \ 538 \ 539 product(bool, TraceSuspendWaitFailures, false, \ 540 "Trace external suspend wait failures") \ 541 \ 542 product(bool, MaxFDLimit, true, \ 543 "Bump the number of file descriptors to maximum in Solaris") \ 544 \ 545 diagnostic(bool, LogEvents, true, \ 546 "Enable the various ring buffer event logs") \ 547 \ 548 diagnostic(uintx, LogEventsBufferEntries, 20, \ 549 "Number of ring buffer event logs") \ 550 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 551 \ 552 product(bool, BytecodeVerificationRemote, true, \ 553 "Enable the Java bytecode verifier for remote classes") \ 554 \ 555 product(bool, BytecodeVerificationLocal, false, \ 556 "Enable the Java bytecode verifier for local classes") \ 557 \ 558 develop(bool, ForceFloatExceptions, trueInDebug, \ 559 "Force exceptions on FP stack under/overflow") \ 560 \ 561 develop(bool, VerifyStackAtCalls, false, \ 562 "Verify that the stack pointer is unchanged after calls") \ 563 \ 564 develop(bool, TraceJavaAssertions, false, \ 565 "Trace java language assertions") \ 566 \ 567 notproduct(bool, VerifyCodeCache, false, \ 568 "Verify code cache on memory allocation/deallocation") \ 569 \ 570 develop(bool, UseMallocOnly, false, \ 571 "Use only malloc/free for allocation (no resource area/arena)") \ 572 \ 573 develop(bool, PrintMallocStatistics, false, \ 574 "Print malloc/free statistics") \ 575 \ 576 develop(bool, ZapResourceArea, trueInDebug, \ 577 "Zap freed resource/arena space with 0xABABABAB") \ 578 \ 579 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 580 "Zap freed VM handle space with 0xBCBCBCBC") \ 581 \ 582 notproduct(bool, ZapStackSegments, trueInDebug, \ 583 "Zap allocated/freed stack segments with 0xFADFADED") \ 584 \ 585 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 586 "Zap unused heap space with 0xBAADBABE") \ 587 \ 588 develop(bool, CheckZapUnusedHeapArea, false, \ 589 "Check zapping of unused heap space") \ 590 \ 591 develop(bool, ZapFillerObjects, trueInDebug, \ 592 "Zap filler objects with 0xDEAFBABE") \ 593 \ 594 develop(bool, PrintVMMessages, true, \ 595 "Print VM messages on console") \ 596 \ 597 notproduct(uintx, ErrorHandlerTest, 0, \ 598 "If > 0, provokes an error after VM initialization; the value " \ 599 "determines which error to provoke. See test_error_handler() " \ 600 "in vmError.cpp.") \ 601 \ 602 notproduct(uintx, TestCrashInErrorHandler, 0, \ 603 "If > 0, provokes an error inside VM error handler (a secondary " \ 604 "crash). see test_error_handler() in vmError.cpp") \ 605 \ 606 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 607 "If true, tests SafeFetch inside error handler.") \ 608 \ 609 notproduct(bool, TestUnresponsiveErrorHandler, false, \ 610 "If true, simulates an unresponsive error handler.") \ 611 \ 612 develop(bool, Verbose, false, \ 613 "Print additional debugging information from other modes") \ 614 \ 615 develop(bool, PrintMiscellaneous, false, \ 616 "Print uncategorized debugging information (requires +Verbose)") \ 617 \ 618 develop(bool, WizardMode, false, \ 619 "Print much more debugging information") \ 620 \ 621 product(bool, ShowMessageBoxOnError, false, \ 622 "Keep process alive on VM fatal error") \ 623 \ 624 product(bool, CreateCoredumpOnCrash, true, \ 625 "Create core/mini dump on VM fatal error") \ 626 \ 627 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 628 "Timeout, in seconds, to limit the time spent on writing an " \ 629 "error log in case of a crash.") \ 630 range(0, (uint64_t)max_jlong/1000) \ 631 \ 632 product_pd(bool, UseOSErrorReporting, \ 633 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 634 \ 635 product(bool, SuppressFatalErrorMessage, false, \ 636 "Report NO fatal error message (avoid deadlock)") \ 637 \ 638 product(ccstrlist, OnError, "", \ 639 "Run user-defined commands on fatal error; see VMError.cpp " \ 640 "for examples") \ 641 \ 642 product(ccstrlist, OnOutOfMemoryError, "", \ 643 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 644 \ 645 manageable(bool, HeapDumpBeforeFullGC, false, \ 646 "Dump heap to file before any major stop-the-world GC") \ 647 \ 648 manageable(bool, HeapDumpAfterFullGC, false, \ 649 "Dump heap to file after any major stop-the-world GC") \ 650 \ 651 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 652 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 653 \ 654 manageable(ccstr, HeapDumpPath, NULL, \ 655 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 656 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 657 "in the working directory)") \ 658 \ 659 develop(bool, BreakAtWarning, false, \ 660 "Execute breakpoint upon encountering VM warning") \ 661 \ 662 develop(bool, UseFakeTimers, false, \ 663 "Tell whether the VM should use system time or a fake timer") \ 664 \ 665 product(ccstr, NativeMemoryTracking, "off", \ 666 "Native memory tracking options") \ 667 \ 668 diagnostic(bool, PrintNMTStatistics, false, \ 669 "Print native memory tracking summary data if it is on") \ 670 \ 671 diagnostic(bool, LogCompilation, false, \ 672 "Log compilation activity in detail to LogFile") \ 673 \ 674 product(bool, PrintCompilation, false, \ 675 "Print compilations") \ 676 \ 677 product(bool, PrintExtendedThreadInfo, false, \ 678 "Print more information in thread dump") \ 679 \ 680 diagnostic(bool, TraceNMethodInstalls, false, \ 681 "Trace nmethod installation") \ 682 \ 683 diagnostic(intx, ScavengeRootsInCode, 2, \ 684 "0: do not allow scavengable oops in the code cache; " \ 685 "1: allow scavenging from the code cache; " \ 686 "2: emit as many constants as the compiler can see") \ 687 range(0, 2) \ 688 \ 689 product(bool, AlwaysRestoreFPU, false, \ 690 "Restore the FPU control word after every JNI call (expensive)") \ 691 \ 692 diagnostic(bool, PrintCompilation2, false, \ 693 "Print additional statistics per compilation") \ 694 \ 695 diagnostic(bool, PrintAdapterHandlers, false, \ 696 "Print code generated for i2c/c2i adapters") \ 697 \ 698 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 699 "Verify that i2c/c2i adapters are called properly") \ 700 \ 701 develop(bool, VerifyAdapterSharing, false, \ 702 "Verify that the code for shared adapters is the equivalent") \ 703 \ 704 diagnostic(bool, PrintAssembly, false, \ 705 "Print assembly code (using external disassembler.so)") \ 706 \ 707 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 708 "Print options string passed to disassembler.so") \ 709 \ 710 notproduct(bool, PrintNMethodStatistics, false, \ 711 "Print a summary statistic for the generated nmethods") \ 712 \ 713 diagnostic(bool, PrintNMethods, false, \ 714 "Print assembly code for nmethods when generated") \ 715 \ 716 diagnostic(bool, PrintNativeNMethods, false, \ 717 "Print assembly code for native nmethods when generated") \ 718 \ 719 develop(bool, PrintDebugInfo, false, \ 720 "Print debug information for all nmethods when generated") \ 721 \ 722 develop(bool, PrintRelocations, false, \ 723 "Print relocation information for all nmethods when generated") \ 724 \ 725 develop(bool, PrintDependencies, false, \ 726 "Print dependency information for all nmethods when generated") \ 727 \ 728 develop(bool, PrintExceptionHandlers, false, \ 729 "Print exception handler tables for all nmethods when generated") \ 730 \ 731 develop(bool, StressCompiledExceptionHandlers, false, \ 732 "Exercise compiled exception handlers") \ 733 \ 734 develop(bool, InterceptOSException, false, \ 735 "Start debugger when an implicit OS (e.g. NULL) " \ 736 "exception happens") \ 737 \ 738 product(bool, PrintCodeCache, false, \ 739 "Print the code cache memory usage when exiting") \ 740 \ 741 develop(bool, PrintCodeCache2, false, \ 742 "Print detailed usage information on the code cache when exiting")\ 743 \ 744 product(bool, PrintCodeCacheOnCompilation, false, \ 745 "Print the code cache memory usage each time a method is " \ 746 "compiled") \ 747 \ 748 diagnostic(bool, PrintStubCode, false, \ 749 "Print generated stub code") \ 750 \ 751 product(bool, StackTraceInThrowable, true, \ 752 "Collect backtrace in throwable when exception happens") \ 753 \ 754 product(bool, OmitStackTraceInFastThrow, true, \ 755 "Omit backtraces for some 'hot' exceptions in optimized code") \ 756 \ 757 product(bool, ProfilerPrintByteCodeStatistics, false, \ 758 "Print bytecode statistics when dumping profiler output") \ 759 \ 760 product(bool, ProfilerRecordPC, false, \ 761 "Collect ticks for each 16 byte interval of compiled code") \ 762 \ 763 product(bool, ProfileVM, false, \ 764 "Profile ticks that fall within VM (either in the VM Thread " \ 765 "or VM code called through stubs)") \ 766 \ 767 product(bool, ProfileIntervals, false, \ 768 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 769 \ 770 notproduct(bool, ProfilerCheckIntervals, false, \ 771 "Collect and print information on spacing of profiler ticks") \ 772 \ 773 product(bool, PrintWarnings, true, \ 774 "Print JVM warnings to output stream") \ 775 \ 776 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 777 "Print warnings for stalled SpinLocks") \ 778 \ 779 product(bool, RegisterFinalizersAtInit, true, \ 780 "Register finalizable objects at end of Object.<init> or " \ 781 "after allocation") \ 782 \ 783 develop(bool, RegisterReferences, true, \ 784 "Tell whether the VM should register soft/weak/final/phantom " \ 785 "references") \ 786 \ 787 develop(bool, IgnoreRewrites, false, \ 788 "Suppress rewrites of bytecodes in the oopmap generator. " \ 789 "This is unsafe!") \ 790 \ 791 develop(bool, PrintCodeCacheExtension, false, \ 792 "Print extension of code cache") \ 793 \ 794 develop(bool, UsePrivilegedStack, true, \ 795 "Enable the security JVM functions") \ 796 \ 797 develop(bool, ProtectionDomainVerification, true, \ 798 "Verify protection domain before resolution in system dictionary")\ 799 \ 800 product(bool, ClassUnloading, true, \ 801 "Do unloading of classes") \ 802 \ 803 product(bool, ClassUnloadingWithConcurrentMark, true, \ 804 "Do unloading of classes with a concurrent marking cycle") \ 805 \ 806 develop(bool, DisableStartThread, false, \ 807 "Disable starting of additional Java threads " \ 808 "(for debugging only)") \ 809 \ 810 develop(bool, MemProfiling, false, \ 811 "Write memory usage profiling to log file") \ 812 \ 813 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 814 "Print the system dictionary at exit") \ 815 \ 816 diagnostic(bool, DynamicallyResizeSystemDictionaries, true, \ 817 "Dynamically resize system dictionaries as needed") \ 818 \ 819 product(bool, AlwaysLockClassLoader, false, \ 820 "Require the VM to acquire the class loader lock before calling " \ 821 "loadClass() even for class loaders registering " \ 822 "as parallel capable") \ 823 \ 824 product(bool, AllowParallelDefineClass, false, \ 825 "Allow parallel defineClass requests for class loaders " \ 826 "registering as parallel capable") \ 827 \ 828 product_pd(bool, DontYieldALot, \ 829 "Throw away obvious excess yield calls") \ 830 \ 831 develop(bool, UseDetachedThreads, true, \ 832 "Use detached threads that are recycled upon termination " \ 833 "(for Solaris only)") \ 834 \ 835 experimental(bool, DisablePrimordialThreadGuardPages, false, \ 836 "Disable the use of stack guard pages if the JVM is loaded " \ 837 "on the primordial process thread") \ 838 \ 839 product(bool, UseLWPSynchronization, true, \ 840 "Use LWP-based instead of libthread-based synchronization " \ 841 "(SPARC only)") \ 842 \ 843 experimental(ccstr, SyncKnobs, NULL, \ 844 "(Unstable) Various monitor synchronization tunables") \ 845 \ 846 experimental(intx, EmitSync, 0, \ 847 "(Unsafe, Unstable) " \ 848 "Control emission of inline sync fast-path code") \ 849 \ 850 product(intx, MonitorBound, 0, "Bound Monitor population") \ 851 range(0, max_jint) \ 852 \ 853 product(bool, MonitorInUseLists, true, "Track Monitors for Deflation") \ 854 \ 855 experimental(intx, MonitorUsedDeflationThreshold, 90, \ 856 "Percentage of used monitors before triggering cleanup " \ 857 "safepoint which deflates monitors (0 is off). " \ 858 "The check is performed on GuaranteedSafepointInterval.") \ 859 range(0, 100) \ 860 \ 861 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 862 "Experimental Sync flags") \ 863 \ 864 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 865 \ 866 experimental(intx, hashCode, 5, \ 867 "(Unstable) select hashCode generation algorithm") \ 868 \ 869 product(bool, FilterSpuriousWakeups, true, \ 870 "When true prevents OS-level spurious, or premature, wakeups " \ 871 "from Object.wait (Ignored for Windows)") \ 872 \ 873 develop(bool, UsePthreads, false, \ 874 "Use pthread-based instead of libthread-based synchronization " \ 875 "(SPARC only)") \ 876 \ 877 product(bool, ReduceSignalUsage, false, \ 878 "Reduce the use of OS signals in Java and/or the VM") \ 879 \ 880 develop(bool, LoadLineNumberTables, true, \ 881 "Tell whether the class file parser loads line number tables") \ 882 \ 883 develop(bool, LoadLocalVariableTables, true, \ 884 "Tell whether the class file parser loads local variable tables") \ 885 \ 886 develop(bool, LoadLocalVariableTypeTables, true, \ 887 "Tell whether the class file parser loads local variable type" \ 888 "tables") \ 889 \ 890 product(bool, AllowUserSignalHandlers, false, \ 891 "Do not complain if the application installs signal handlers " \ 892 "(Solaris & Linux only)") \ 893 \ 894 product(bool, UseSignalChaining, true, \ 895 "Use signal-chaining to invoke signal handlers installed " \ 896 "by the application (Solaris & Linux only)") \ 897 \ 898 product(bool, AllowJNIEnvProxy, false, \ 899 "Allow JNIEnv proxies for jdbx") \ 900 \ 901 product(bool, RestoreMXCSROnJNICalls, false, \ 902 "Restore MXCSR when returning from JNI calls") \ 903 \ 904 product(bool, CheckJNICalls, false, \ 905 "Verify all arguments to JNI calls") \ 906 \ 907 product(bool, UseFastJNIAccessors, true, \ 908 "Use optimized versions of Get<Primitive>Field") \ 909 \ 910 product(intx, MaxJNILocalCapacity, 65536, \ 911 "Maximum allowable local JNI handle capacity to " \ 912 "EnsureLocalCapacity() and PushLocalFrame(), " \ 913 "where <= 0 is unlimited, default: 65536") \ 914 range(min_intx, max_intx) \ 915 \ 916 product(bool, EagerXrunInit, false, \ 917 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 918 "but not all -Xrun libraries may support the state of the VM " \ 919 "at this time") \ 920 \ 921 product(bool, PreserveAllAnnotations, false, \ 922 "Preserve RuntimeInvisibleAnnotations as well " \ 923 "as RuntimeVisibleAnnotations") \ 924 \ 925 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 926 "Number of OutOfMemoryErrors preallocated with backtrace") \ 927 \ 928 product(bool, UseXMMForArrayCopy, false, \ 929 "Use SSE2 MOVQ instruction for Arraycopy") \ 930 \ 931 product(intx, FieldsAllocationStyle, 1, \ 932 "0 - type based with oops first, " \ 933 "1 - with oops last, " \ 934 "2 - oops in super and sub classes are together") \ 935 range(0, 2) \ 936 \ 937 product(bool, CompactFields, true, \ 938 "Allocate nonstatic fields in gaps between previous fields") \ 939 \ 940 notproduct(bool, PrintFieldLayout, false, \ 941 "Print field layout for each class") \ 942 \ 943 /* Need to limit the extent of the padding to reasonable size. */\ 944 /* 8K is well beyond the reasonable HW cache line size, even with */\ 945 /* aggressive prefetching, while still leaving the room for segregating */\ 946 /* among the distinct pages. */\ 947 product(intx, ContendedPaddingWidth, 128, \ 948 "How many bytes to pad the fields/classes marked @Contended with")\ 949 range(0, 8192) \ 950 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 951 \ 952 product(bool, EnableContended, true, \ 953 "Enable @Contended annotation support") \ 954 \ 955 product(bool, RestrictContended, true, \ 956 "Restrict @Contended to trusted classes") \ 957 \ 958 product(bool, UseBiasedLocking, true, \ 959 "Enable biased locking in JVM") \ 960 \ 961 product(intx, BiasedLockingStartupDelay, 0, \ 962 "Number of milliseconds to wait before enabling biased locking") \ 963 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 964 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 965 \ 966 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 967 "Print statistics of biased locking in JVM") \ 968 \ 969 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 970 "Threshold of number of revocations per type to try to " \ 971 "rebias all objects in the heap of that type") \ 972 range(0, max_intx) \ 973 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 974 \ 975 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 976 "Threshold of number of revocations per type to permanently " \ 977 "revoke biases of all objects in the heap of that type") \ 978 range(0, max_intx) \ 979 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 980 \ 981 product(intx, BiasedLockingDecayTime, 25000, \ 982 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 983 "type after previous bulk rebias") \ 984 range(500, max_intx) \ 985 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 986 \ 987 product(bool, ExitOnOutOfMemoryError, false, \ 988 "JVM exits on the first occurrence of an out-of-memory error") \ 989 \ 990 product(bool, CrashOnOutOfMemoryError, false, \ 991 "JVM aborts, producing an error log and core/mini dump, on the " \ 992 "first occurrence of an out-of-memory error") \ 993 \ 994 /* tracing */ \ 995 \ 996 develop(bool, StressRewriter, false, \ 997 "Stress linktime bytecode rewriting") \ 998 \ 999 product(ccstr, TraceJVMTI, NULL, \ 1000 "Trace flags for JVMTI functions and events") \ 1001 \ 1002 /* This option can change an EMCP method into an obsolete method. */ \ 1003 /* This can affect tests that except specific methods to be EMCP. */ \ 1004 /* This option should be used with caution. */ \ 1005 product(bool, StressLdcRewrite, false, \ 1006 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1007 \ 1008 /* change to false by default sometime after Mustang */ \ 1009 product(bool, VerifyMergedCPBytecodes, true, \ 1010 "Verify bytecodes after RedefineClasses constant pool merging") \ 1011 \ 1012 develop(bool, TraceBytecodes, false, \ 1013 "Trace bytecode execution") \ 1014 \ 1015 develop(bool, TraceICs, false, \ 1016 "Trace inline cache changes") \ 1017 \ 1018 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1019 "Trace method invocation counter overflow") \ 1020 \ 1021 develop(bool, TraceInlineCacheClearing, false, \ 1022 "Trace clearing of inline caches in nmethods") \ 1023 \ 1024 develop(bool, TraceDependencies, false, \ 1025 "Trace dependencies") \ 1026 \ 1027 develop(bool, VerifyDependencies, trueInDebug, \ 1028 "Exercise and verify the compilation dependency mechanism") \ 1029 \ 1030 develop(bool, TraceNewOopMapGeneration, false, \ 1031 "Trace OopMapGeneration") \ 1032 \ 1033 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1034 "Trace OopMapGeneration: print detailed cell states") \ 1035 \ 1036 develop(bool, TimeOopMap, false, \ 1037 "Time calls to GenerateOopMap::compute_map() in sum") \ 1038 \ 1039 develop(bool, TimeOopMap2, false, \ 1040 "Time calls to GenerateOopMap::compute_map() individually") \ 1041 \ 1042 develop(bool, TraceOopMapRewrites, false, \ 1043 "Trace rewriting of method oops during oop map generation") \ 1044 \ 1045 develop(bool, TraceICBuffer, false, \ 1046 "Trace usage of IC buffer") \ 1047 \ 1048 develop(bool, TraceCompiledIC, false, \ 1049 "Trace changes of compiled IC") \ 1050 \ 1051 develop(bool, FLSVerifyDictionary, false, \ 1052 "Do lots of (expensive) FLS dictionary verification") \ 1053 \ 1054 \ 1055 notproduct(bool, CheckMemoryInitialization, false, \ 1056 "Check memory initialization") \ 1057 \ 1058 product(uintx, ProcessDistributionStride, 4, \ 1059 "Stride through processors when distributing processes") \ 1060 range(0, max_juint) \ 1061 \ 1062 develop(bool, TraceFinalizerRegistration, false, \ 1063 "Trace registration of final references") \ 1064 \ 1065 product(bool, IgnoreEmptyClassPaths, false, \ 1066 "Ignore empty path elements in -classpath") \ 1067 \ 1068 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 1069 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 1070 "Initial size of the boot class loader data metaspace") \ 1071 range(30*K, max_uintx/BytesPerWord) \ 1072 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 1073 \ 1074 product(bool, PrintHeapAtSIGBREAK, true, \ 1075 "Print heap layout in response to SIGBREAK") \ 1076 \ 1077 manageable(bool, PrintClassHistogram, false, \ 1078 "Print a histogram of class instances") \ 1079 \ 1080 develop(bool, IgnoreLibthreadGPFault, false, \ 1081 "Suppress workaround for libthread GP fault") \ 1082 \ 1083 experimental(double, ObjectCountCutOffPercent, 0.5, \ 1084 "The percentage of the used heap that the instances of a class " \ 1085 "must occupy for the class to generate a trace event") \ 1086 range(0.0, 100.0) \ 1087 \ 1088 /* JVMTI heap profiling */ \ 1089 \ 1090 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 1091 "Trace JVMTI object tagging calls") \ 1092 \ 1093 diagnostic(bool, VerifyBeforeIteration, false, \ 1094 "Verify memory system before JVMTI iteration") \ 1095 \ 1096 /* compiler interface */ \ 1097 \ 1098 develop(bool, CIPrintCompilerName, false, \ 1099 "when CIPrint is active, print the name of the active compiler") \ 1100 \ 1101 diagnostic(bool, CIPrintCompileQueue, false, \ 1102 "display the contents of the compile queue whenever a " \ 1103 "compilation is enqueued") \ 1104 \ 1105 develop(bool, CIPrintRequests, false, \ 1106 "display every request for compilation") \ 1107 \ 1108 product(bool, CITime, false, \ 1109 "collect timing information for compilation") \ 1110 \ 1111 develop(bool, CITimeVerbose, false, \ 1112 "be more verbose in compilation timings") \ 1113 \ 1114 develop(bool, CITimeEach, false, \ 1115 "display timing information after each successful compilation") \ 1116 \ 1117 develop(bool, CICountOSR, false, \ 1118 "use a separate counter when assigning ids to osr compilations") \ 1119 \ 1120 develop(bool, CICompileNatives, true, \ 1121 "compile native methods if supported by the compiler") \ 1122 \ 1123 develop_pd(bool, CICompileOSR, \ 1124 "compile on stack replacement methods if supported by the " \ 1125 "compiler") \ 1126 \ 1127 develop(bool, CIPrintMethodCodes, false, \ 1128 "print method bytecodes of the compiled code") \ 1129 \ 1130 develop(bool, CIPrintTypeFlow, false, \ 1131 "print the results of ciTypeFlow analysis") \ 1132 \ 1133 develop(bool, CITraceTypeFlow, false, \ 1134 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 1135 \ 1136 develop(intx, OSROnlyBCI, -1, \ 1137 "OSR only at this bci. Negative values mean exclude that bci") \ 1138 \ 1139 /* compiler */ \ 1140 \ 1141 /* notice: the max range value here is max_jint, not max_intx */ \ 1142 /* because of overflow issue */ \ 1143 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 1144 "Number of compiler threads to run") \ 1145 range(0, max_jint) \ 1146 constraint(CICompilerCountConstraintFunc, AfterErgo) \ 1147 \ 1148 product(bool, UseDynamicNumberOfCompilerThreads, true, \ 1149 "Dynamically choose the number of parallel compiler threads") \ 1150 \ 1151 diagnostic(bool, ReduceNumberOfCompilerThreads, true, \ 1152 "Reduce the number of parallel compiler threads when they " \ 1153 "are not used") \ 1154 \ 1155 diagnostic(bool, TraceCompilerThreads, false, \ 1156 "Trace creation and removal of compiler threads") \ 1157 \ 1158 develop(bool, InjectCompilerCreationFailure, false, \ 1159 "Inject thread creation failures for " \ 1160 "UseDynamicNumberOfCompilerThreads") \ 1161 \ 1162 product(intx, CompilationPolicyChoice, 0, \ 1163 "which compilation policy (0-2)") \ 1164 range(0, 2) \ 1165 \ 1166 develop(bool, UseStackBanging, true, \ 1167 "use stack banging for stack overflow checks (required for " \ 1168 "proper StackOverflow handling; disable only to measure cost " \ 1169 "of stackbanging)") \ 1170 \ 1171 develop(bool, UseStrictFP, true, \ 1172 "use strict fp if modifier strictfp is set") \ 1173 \ 1174 develop(bool, GenerateSynchronizationCode, true, \ 1175 "generate locking/unlocking code for synchronized methods and " \ 1176 "monitors") \ 1177 \ 1178 develop(bool, GenerateRangeChecks, true, \ 1179 "Generate range checks for array accesses") \ 1180 \ 1181 diagnostic_pd(bool, ImplicitNullChecks, \ 1182 "Generate code for implicit null checks") \ 1183 \ 1184 product_pd(bool, TrapBasedNullChecks, \ 1185 "Generate code for null checks that uses a cmp and trap " \ 1186 "instruction raising SIGTRAP. This is only used if an access to" \ 1187 "null (+offset) will not raise a SIGSEGV, i.e.," \ 1188 "ImplicitNullChecks don't work (PPC64).") \ 1189 \ 1190 product(bool, PrintSafepointStatistics, false, \ 1191 "(Deprecated) Print statistics about safepoint synchronization") \ 1192 \ 1193 product(intx, PrintSafepointStatisticsCount, 300, \ 1194 "(Deprecated) Total number of safepoint statistics collected " \ 1195 "before printing them out") \ 1196 range(1, max_intx) \ 1197 \ 1198 product(intx, PrintSafepointStatisticsTimeout, -1, \ 1199 "(Deprecated) Print safepoint statistics only when safepoint takes " \ 1200 "more than PrintSafepointSatisticsTimeout in millis") \ 1201 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 1202 NOT_LP64(range(-1, max_intx)) \ 1203 \ 1204 diagnostic(bool, EnableThreadSMRExtraValidityChecks, true, \ 1205 "Enable Thread SMR extra validity checks") \ 1206 \ 1207 diagnostic(bool, EnableThreadSMRStatistics, trueInDebug, \ 1208 "Enable Thread SMR Statistics") \ 1209 \ 1210 product(bool, Inline, true, \ 1211 "Enable inlining") \ 1212 \ 1213 product(bool, ClipInlining, true, \ 1214 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 1215 \ 1216 develop(bool, UseCHA, true, \ 1217 "Enable CHA") \ 1218 \ 1219 product(bool, UseTypeProfile, true, \ 1220 "Check interpreter profile for historically monomorphic calls") \ 1221 \ 1222 diagnostic(bool, PrintInlining, false, \ 1223 "Print inlining optimizations") \ 1224 \ 1225 product(bool, UsePopCountInstruction, false, \ 1226 "Use population count instruction") \ 1227 \ 1228 develop(bool, EagerInitialization, false, \ 1229 "Eagerly initialize classes if possible") \ 1230 \ 1231 diagnostic(bool, LogTouchedMethods, false, \ 1232 "Log methods which have been ever touched in runtime") \ 1233 \ 1234 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 1235 "Print all methods that have been ever touched in runtime") \ 1236 \ 1237 develop(bool, TraceMethodReplacement, false, \ 1238 "Print when methods are replaced do to recompilation") \ 1239 \ 1240 develop(bool, PrintMethodFlushing, false, \ 1241 "Print the nmethods being flushed") \ 1242 \ 1243 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 1244 "print statistics about method flushing") \ 1245 \ 1246 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 1247 "Number of compiled code invocations after which " \ 1248 "the method is considered as hot by the flusher") \ 1249 range(1, max_jint) \ 1250 \ 1251 diagnostic(intx, MinPassesBeforeFlush, 10, \ 1252 "Minimum number of sweeper passes before an nmethod " \ 1253 "can be flushed") \ 1254 range(0, max_intx) \ 1255 \ 1256 product(bool, UseCodeAging, true, \ 1257 "Insert counter to detect warm methods") \ 1258 \ 1259 diagnostic(bool, StressCodeAging, false, \ 1260 "Start with counters compiled in") \ 1261 \ 1262 develop(bool, StressCodeBuffers, false, \ 1263 "Exercise code buffer expansion and other rare state changes") \ 1264 \ 1265 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 1266 "Generate extra debugging information for non-safepoints in " \ 1267 "nmethods") \ 1268 \ 1269 product(bool, PrintVMOptions, false, \ 1270 "Print flags that appeared on the command line") \ 1271 \ 1272 product(bool, IgnoreUnrecognizedVMOptions, false, \ 1273 "Ignore unrecognized VM options") \ 1274 \ 1275 product(bool, PrintCommandLineFlags, false, \ 1276 "Print flags specified on command line or set by ergonomics") \ 1277 \ 1278 product(bool, PrintFlagsInitial, false, \ 1279 "Print all VM flags before argument processing and exit VM") \ 1280 \ 1281 product(bool, PrintFlagsFinal, false, \ 1282 "Print all VM flags after argument and ergonomic processing") \ 1283 \ 1284 notproduct(bool, PrintFlagsWithComments, false, \ 1285 "Print all VM flags with default values and descriptions and " \ 1286 "exit") \ 1287 \ 1288 product(bool, PrintFlagsRanges, false, \ 1289 "Print VM flags and their ranges and exit VM") \ 1290 \ 1291 diagnostic(bool, SerializeVMOutput, true, \ 1292 "Use a mutex to serialize output to tty and LogFile") \ 1293 \ 1294 diagnostic(bool, DisplayVMOutput, true, \ 1295 "Display all VM output on the tty, independently of LogVMOutput") \ 1296 \ 1297 diagnostic(bool, LogVMOutput, false, \ 1298 "Save VM output to LogFile") \ 1299 \ 1300 diagnostic(ccstr, LogFile, NULL, \ 1301 "If LogVMOutput or LogCompilation is on, save VM output to " \ 1302 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 1303 \ 1304 product(ccstr, ErrorFile, NULL, \ 1305 "If an error occurs, save the error data to this file " \ 1306 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 1307 \ 1308 product(bool, ExtensiveErrorReports, \ 1309 PRODUCT_ONLY(false) NOT_PRODUCT(true), \ 1310 "Error reports are more extensive.") \ 1311 \ 1312 product(bool, DisplayVMOutputToStderr, false, \ 1313 "If DisplayVMOutput is true, display all VM output to stderr") \ 1314 \ 1315 product(bool, DisplayVMOutputToStdout, false, \ 1316 "If DisplayVMOutput is true, display all VM output to stdout") \ 1317 \ 1318 product(bool, ErrorFileToStderr, false, \ 1319 "If true, error data is printed to stderr instead of a file") \ 1320 \ 1321 product(bool, ErrorFileToStdout, false, \ 1322 "If true, error data is printed to stdout instead of a file") \ 1323 \ 1324 product(bool, UseHeavyMonitors, false, \ 1325 "use heavyweight instead of lightweight Java monitors") \ 1326 \ 1327 product(bool, PrintStringTableStatistics, false, \ 1328 "print statistics about the StringTable and SymbolTable") \ 1329 \ 1330 diagnostic(bool, VerifyStringTableAtExit, false, \ 1331 "verify StringTable contents at exit") \ 1332 \ 1333 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 1334 "print histogram of the symbol table") \ 1335 \ 1336 notproduct(bool, ExitVMOnVerifyError, false, \ 1337 "standard exit from VM if bytecode verify error " \ 1338 "(only in debug mode)") \ 1339 \ 1340 diagnostic(ccstr, AbortVMOnException, NULL, \ 1341 "Call fatal if this exception is thrown. Example: " \ 1342 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 1343 \ 1344 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 1345 "Call fatal if the exception pointed by AbortVMOnException " \ 1346 "has this message") \ 1347 \ 1348 develop(bool, DebugVtables, false, \ 1349 "add debugging code to vtable dispatch") \ 1350 \ 1351 notproduct(bool, PrintVtableStats, false, \ 1352 "print vtables stats at end of run") \ 1353 \ 1354 develop(bool, TraceCreateZombies, false, \ 1355 "trace creation of zombie nmethods") \ 1356 \ 1357 notproduct(bool, IgnoreLockingAssertions, false, \ 1358 "disable locking assertions (for speed)") \ 1359 \ 1360 product(bool, RangeCheckElimination, true, \ 1361 "Eliminate range checks") \ 1362 \ 1363 develop_pd(bool, UncommonNullCast, \ 1364 "track occurrences of null in casts; adjust compiler tactics") \ 1365 \ 1366 develop(bool, TypeProfileCasts, true, \ 1367 "treat casts like calls for purposes of type profiling") \ 1368 \ 1369 develop(bool, DelayCompilationDuringStartup, true, \ 1370 "Delay invoking the compiler until main application class is " \ 1371 "loaded") \ 1372 \ 1373 develop(bool, CompileTheWorld, false, \ 1374 "Compile all methods in all classes in bootstrap class path " \ 1375 "(stress test)") \ 1376 \ 1377 develop(bool, CompileTheWorldPreloadClasses, true, \ 1378 "Preload all classes used by a class before start loading") \ 1379 \ 1380 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 1381 "Force a safepoint every n compiles so sweeper can keep up") \ 1382 \ 1383 develop(bool, FillDelaySlots, true, \ 1384 "Fill delay slots (on SPARC only)") \ 1385 \ 1386 develop(bool, TimeLivenessAnalysis, false, \ 1387 "Time computation of bytecode liveness analysis") \ 1388 \ 1389 develop(bool, TraceLivenessGen, false, \ 1390 "Trace the generation of liveness analysis information") \ 1391 \ 1392 notproduct(bool, TraceLivenessQuery, false, \ 1393 "Trace queries of liveness analysis information") \ 1394 \ 1395 notproduct(bool, CollectIndexSetStatistics, false, \ 1396 "Collect information about IndexSets") \ 1397 \ 1398 develop(bool, UseLoopSafepoints, true, \ 1399 "Generate Safepoint nodes in every loop") \ 1400 \ 1401 develop(intx, FastAllocateSizeLimit, 128*K, \ 1402 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 1403 "Inline allocations larger than this in doublewords must go slow")\ 1404 \ 1405 product(bool, AggressiveOpts, false, \ 1406 "(Deprecated) Enable aggressive optimizations - see arguments.cpp") \ 1407 \ 1408 product_pd(bool, CompactStrings, \ 1409 "Enable Strings to use single byte chars in backing store") \ 1410 \ 1411 product_pd(uintx, TypeProfileLevel, \ 1412 "=XYZ, with Z: Type profiling of arguments at call; " \ 1413 "Y: Type profiling of return value at call; " \ 1414 "X: Type profiling of parameters to methods; " \ 1415 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 1416 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 1417 \ 1418 product(intx, TypeProfileArgsLimit, 2, \ 1419 "max number of call arguments to consider for type profiling") \ 1420 range(0, 16) \ 1421 \ 1422 product(intx, TypeProfileParmsLimit, 2, \ 1423 "max number of incoming parameters to consider for type profiling"\ 1424 ", -1 for all") \ 1425 range(-1, 64) \ 1426 \ 1427 /* statistics */ \ 1428 develop(bool, CountCompiledCalls, false, \ 1429 "Count method invocations") \ 1430 \ 1431 notproduct(bool, CountRuntimeCalls, false, \ 1432 "Count VM runtime calls") \ 1433 \ 1434 develop(bool, CountJNICalls, false, \ 1435 "Count jni method invocations") \ 1436 \ 1437 notproduct(bool, CountJVMCalls, false, \ 1438 "Count jvm method invocations") \ 1439 \ 1440 notproduct(bool, CountRemovableExceptions, false, \ 1441 "Count exceptions that could be replaced by branches due to " \ 1442 "inlining") \ 1443 \ 1444 notproduct(bool, ICMissHistogram, false, \ 1445 "Produce histogram of IC misses") \ 1446 \ 1447 /* interpreter */ \ 1448 product_pd(bool, RewriteBytecodes, \ 1449 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 1450 \ 1451 product_pd(bool, RewriteFrequentPairs, \ 1452 "Rewrite frequently used bytecode pairs into a single bytecode") \ 1453 \ 1454 diagnostic(bool, PrintInterpreter, false, \ 1455 "Print the generated interpreter code") \ 1456 \ 1457 product(bool, UseInterpreter, true, \ 1458 "Use interpreter for non-compiled methods") \ 1459 \ 1460 develop(bool, UseFastSignatureHandlers, true, \ 1461 "Use fast signature handlers for native calls") \ 1462 \ 1463 product(bool, UseLoopCounter, true, \ 1464 "Increment invocation counter on backward branch") \ 1465 \ 1466 product_pd(bool, UseOnStackReplacement, \ 1467 "Use on stack replacement, calls runtime if invoc. counter " \ 1468 "overflows in loop") \ 1469 \ 1470 notproduct(bool, TraceOnStackReplacement, false, \ 1471 "Trace on stack replacement") \ 1472 \ 1473 product_pd(bool, PreferInterpreterNativeStubs, \ 1474 "Use always interpreter stubs for native methods invoked via " \ 1475 "interpreter") \ 1476 \ 1477 develop(bool, CountBytecodes, false, \ 1478 "Count number of bytecodes executed") \ 1479 \ 1480 develop(bool, PrintBytecodeHistogram, false, \ 1481 "Print histogram of the executed bytecodes") \ 1482 \ 1483 develop(bool, PrintBytecodePairHistogram, false, \ 1484 "Print histogram of the executed bytecode pairs") \ 1485 \ 1486 diagnostic(bool, PrintSignatureHandlers, false, \ 1487 "Print code generated for native method signature handlers") \ 1488 \ 1489 develop(bool, VerifyOops, false, \ 1490 "Do plausibility checks for oops") \ 1491 \ 1492 develop(bool, CheckUnhandledOops, false, \ 1493 "Check for unhandled oops in VM code") \ 1494 \ 1495 develop(bool, VerifyJNIFields, trueInDebug, \ 1496 "Verify jfieldIDs for instance fields") \ 1497 \ 1498 notproduct(bool, VerifyJNIEnvThread, false, \ 1499 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 1500 "from JNI") \ 1501 \ 1502 develop(bool, VerifyFPU, false, \ 1503 "Verify FPU state (check for NaN's, etc.)") \ 1504 \ 1505 develop(bool, VerifyThread, false, \ 1506 "Watch the thread register for corruption (SPARC only)") \ 1507 \ 1508 develop(bool, VerifyActivationFrameSize, false, \ 1509 "Verify that activation frame didn't become smaller than its " \ 1510 "minimal size") \ 1511 \ 1512 develop(bool, TraceFrequencyInlining, false, \ 1513 "Trace frequency based inlining") \ 1514 \ 1515 develop_pd(bool, InlineIntrinsics, \ 1516 "Inline intrinsics that can be statically resolved") \ 1517 \ 1518 product_pd(bool, ProfileInterpreter, \ 1519 "Profile at the bytecode level during interpretation") \ 1520 \ 1521 develop(bool, TraceProfileInterpreter, false, \ 1522 "Trace profiling at the bytecode level during interpretation. " \ 1523 "This outputs the profiling information collected to improve " \ 1524 "jit compilation.") \ 1525 \ 1526 develop_pd(bool, ProfileTraps, \ 1527 "Profile deoptimization traps at the bytecode level") \ 1528 \ 1529 product(intx, ProfileMaturityPercentage, 20, \ 1530 "number of method invocations/branches (expressed as % of " \ 1531 "CompileThreshold) before using the method's profile") \ 1532 range(0, 100) \ 1533 \ 1534 diagnostic(bool, PrintMethodData, false, \ 1535 "Print the results of +ProfileInterpreter at end of run") \ 1536 \ 1537 develop(bool, VerifyDataPointer, trueInDebug, \ 1538 "Verify the method data pointer during interpreter profiling") \ 1539 \ 1540 develop(bool, VerifyCompiledCode, false, \ 1541 "Include miscellaneous runtime verifications in nmethod code; " \ 1542 "default off because it disturbs nmethod size heuristics") \ 1543 \ 1544 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 1545 "Manually make GC thread crash then dump java stack trace; " \ 1546 "Test only") \ 1547 \ 1548 /* compilation */ \ 1549 product(bool, UseCompiler, true, \ 1550 "Use Just-In-Time compilation") \ 1551 \ 1552 develop(bool, TraceCompilationPolicy, false, \ 1553 "Trace compilation policy") \ 1554 \ 1555 develop(bool, TimeCompilationPolicy, false, \ 1556 "Time the compilation policy") \ 1557 \ 1558 product(bool, UseCounterDecay, true, \ 1559 "Adjust recompilation counters") \ 1560 \ 1561 develop(intx, CounterHalfLifeTime, 30, \ 1562 "Half-life time of invocation counters (in seconds)") \ 1563 \ 1564 develop(intx, CounterDecayMinIntervalLength, 500, \ 1565 "The minimum interval (in milliseconds) between invocation of " \ 1566 "CounterDecay") \ 1567 \ 1568 product(bool, AlwaysCompileLoopMethods, false, \ 1569 "When using recompilation, never interpret methods " \ 1570 "containing loops") \ 1571 \ 1572 product(bool, DontCompileHugeMethods, true, \ 1573 "Do not compile methods > HugeMethodLimit") \ 1574 \ 1575 /* Bytecode escape analysis estimation. */ \ 1576 product(bool, EstimateArgEscape, true, \ 1577 "Analyze bytecodes to estimate escape state of arguments") \ 1578 \ 1579 product(intx, BCEATraceLevel, 0, \ 1580 "How much tracing to do of bytecode escape analysis estimates " \ 1581 "(0-3)") \ 1582 range(0, 3) \ 1583 \ 1584 product(intx, MaxBCEAEstimateLevel, 5, \ 1585 "Maximum number of nested calls that are analyzed by BC EA") \ 1586 range(0, max_jint) \ 1587 \ 1588 product(intx, MaxBCEAEstimateSize, 150, \ 1589 "Maximum bytecode size of a method to be analyzed by BC EA") \ 1590 range(0, max_jint) \ 1591 \ 1592 product(intx, AllocatePrefetchStyle, 1, \ 1593 "0 = no prefetch, " \ 1594 "1 = generate prefetch instructions for each allocation, " \ 1595 "2 = use TLAB watermark to gate allocation prefetch, " \ 1596 "3 = generate one prefetch instruction per cache line") \ 1597 range(0, 3) \ 1598 \ 1599 product(intx, AllocatePrefetchDistance, -1, \ 1600 "Distance to prefetch ahead of allocation pointer. " \ 1601 "-1: use system-specific value (automatically determined") \ 1602 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 1603 \ 1604 product(intx, AllocatePrefetchLines, 3, \ 1605 "Number of lines to prefetch ahead of array allocation pointer") \ 1606 range(1, 64) \ 1607 \ 1608 product(intx, AllocateInstancePrefetchLines, 1, \ 1609 "Number of lines to prefetch ahead of instance allocation " \ 1610 "pointer") \ 1611 range(1, 64) \ 1612 \ 1613 product(intx, AllocatePrefetchStepSize, 16, \ 1614 "Step size in bytes of sequential prefetch instructions") \ 1615 range(1, 512) \ 1616 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 1617 \ 1618 product(intx, AllocatePrefetchInstr, 0, \ 1619 "Select instruction to prefetch ahead of allocation pointer") \ 1620 constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit) \ 1621 \ 1622 /* deoptimization */ \ 1623 develop(bool, TraceDeoptimization, false, \ 1624 "Trace deoptimization") \ 1625 \ 1626 develop(bool, PrintDeoptimizationDetails, false, \ 1627 "Print more information about deoptimization") \ 1628 \ 1629 develop(bool, DebugDeoptimization, false, \ 1630 "Tracing various information while debugging deoptimization") \ 1631 \ 1632 product(intx, SelfDestructTimer, 0, \ 1633 "Will cause VM to terminate after a given time (in minutes) " \ 1634 "(0 means off)") \ 1635 range(0, max_intx) \ 1636 \ 1637 product(intx, MaxJavaStackTraceDepth, 1024, \ 1638 "The maximum number of lines in the stack trace for Java " \ 1639 "exceptions (0 means all)") \ 1640 range(0, max_jint/2) \ 1641 \ 1642 /* notice: the max range value here is max_jint, not max_intx */ \ 1643 /* because of overflow issue */ \ 1644 diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 1645 "Guarantee a safepoint (at least) every so many milliseconds " \ 1646 "(0 means none)") \ 1647 range(0, max_jint) \ 1648 \ 1649 product(intx, SafepointTimeoutDelay, 10000, \ 1650 "Delay in milliseconds for option SafepointTimeout") \ 1651 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 1652 NOT_LP64(range(0, max_intx)) \ 1653 \ 1654 product(intx, NmethodSweepActivity, 10, \ 1655 "Removes cold nmethods from code cache if > 0. Higher values " \ 1656 "result in more aggressive sweeping") \ 1657 range(0, 2000) \ 1658 \ 1659 notproduct(bool, LogSweeper, false, \ 1660 "Keep a ring buffer of sweeper activity") \ 1661 \ 1662 notproduct(intx, SweeperLogEntries, 1024, \ 1663 "Number of records in the ring buffer of sweeper activity") \ 1664 \ 1665 notproduct(intx, MemProfilingInterval, 500, \ 1666 "Time between each invocation of the MemProfiler") \ 1667 \ 1668 develop(intx, MallocCatchPtr, -1, \ 1669 "Hit breakpoint when mallocing/freeing this pointer") \ 1670 \ 1671 notproduct(ccstrlist, SuppressErrorAt, "", \ 1672 "List of assertions (file:line) to muzzle") \ 1673 \ 1674 develop(intx, StackPrintLimit, 100, \ 1675 "number of stack frames to print in VM-level stack dump") \ 1676 \ 1677 notproduct(intx, MaxElementPrintSize, 256, \ 1678 "maximum number of elements to print") \ 1679 \ 1680 notproduct(intx, MaxSubklassPrintSize, 4, \ 1681 "maximum number of subklasses to print when printing klass") \ 1682 \ 1683 product(intx, MaxInlineLevel, 15, \ 1684 "maximum number of nested calls that are inlined") \ 1685 range(0, max_jint) \ 1686 \ 1687 product(intx, MaxRecursiveInlineLevel, 1, \ 1688 "maximum number of nested recursive calls that are inlined") \ 1689 range(0, max_jint) \ 1690 \ 1691 develop(intx, MaxForceInlineLevel, 100, \ 1692 "maximum number of nested calls that are forced for inlining " \ 1693 "(using CompileCommand or marked w/ @ForceInline)") \ 1694 range(0, max_jint) \ 1695 \ 1696 product_pd(intx, InlineSmallCode, \ 1697 "Only inline already compiled methods if their code size is " \ 1698 "less than this") \ 1699 range(0, max_jint) \ 1700 \ 1701 product(intx, MaxInlineSize, 35, \ 1702 "The maximum bytecode size of a method to be inlined") \ 1703 range(0, max_jint) \ 1704 \ 1705 product_pd(intx, FreqInlineSize, \ 1706 "The maximum bytecode size of a frequent method to be inlined") \ 1707 range(0, max_jint) \ 1708 \ 1709 product(intx, MaxTrivialSize, 6, \ 1710 "The maximum bytecode size of a trivial method to be inlined") \ 1711 range(0, max_jint) \ 1712 \ 1713 product(intx, MinInliningThreshold, 250, \ 1714 "The minimum invocation count a method needs to have to be " \ 1715 "inlined") \ 1716 range(0, max_jint) \ 1717 \ 1718 develop(intx, MethodHistogramCutoff, 100, \ 1719 "The cutoff value for method invocation histogram (+CountCalls)") \ 1720 \ 1721 diagnostic(intx, ProfilerNumberOfInterpretedMethods, 25, \ 1722 "Number of interpreted methods to show in profile") \ 1723 \ 1724 diagnostic(intx, ProfilerNumberOfCompiledMethods, 25, \ 1725 "Number of compiled methods to show in profile") \ 1726 \ 1727 diagnostic(intx, ProfilerNumberOfStubMethods, 25, \ 1728 "Number of stub methods to show in profile") \ 1729 \ 1730 diagnostic(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 1731 "Number of runtime stub nodes to show in profile") \ 1732 \ 1733 product(intx, ProfileIntervalsTicks, 100, \ 1734 "Number of ticks between printing of interval profile " \ 1735 "(+ProfileIntervals)") \ 1736 range(0, max_intx) \ 1737 \ 1738 develop(intx, DontYieldALotInterval, 10, \ 1739 "Interval between which yields will be dropped (milliseconds)") \ 1740 \ 1741 develop(intx, ProfilerPCTickThreshold, 15, \ 1742 "Number of ticks in a PC buckets to be a hotspot") \ 1743 \ 1744 notproduct(intx, DeoptimizeALotInterval, 5, \ 1745 "Number of exits until DeoptimizeALot kicks in") \ 1746 \ 1747 notproduct(intx, ZombieALotInterval, 5, \ 1748 "Number of exits until ZombieALot kicks in") \ 1749 \ 1750 diagnostic(uintx, MallocMaxTestWords, 0, \ 1751 "If non-zero, maximum number of words that malloc/realloc can " \ 1752 "allocate (for testing only)") \ 1753 range(0, max_uintx) \ 1754 \ 1755 product(intx, TypeProfileWidth, 2, \ 1756 "Number of receiver types to record in call/cast profile") \ 1757 range(0, 8) \ 1758 \ 1759 develop(intx, BciProfileWidth, 2, \ 1760 "Number of return bci's to record in ret profile") \ 1761 \ 1762 product(intx, PerMethodRecompilationCutoff, 400, \ 1763 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 1764 range(-1, max_intx) \ 1765 \ 1766 product(intx, PerBytecodeRecompilationCutoff, 200, \ 1767 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 1768 range(-1, max_intx) \ 1769 \ 1770 product(intx, PerMethodTrapLimit, 100, \ 1771 "Limit on traps (of one kind) in a method (includes inlines)") \ 1772 range(0, max_jint) \ 1773 \ 1774 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 1775 "Limit on speculative traps (of one kind) in a method " \ 1776 "(includes inlines)") \ 1777 range(0, max_jint) \ 1778 \ 1779 product(intx, PerBytecodeTrapLimit, 4, \ 1780 "Limit on traps (of one kind) at a particular BCI") \ 1781 range(0, max_jint) \ 1782 \ 1783 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 1784 "Extra method data trap entries for speculation") \ 1785 \ 1786 develop(intx, InlineFrequencyRatio, 20, \ 1787 "Ratio of call site execution to caller method invocation") \ 1788 range(0, max_jint) \ 1789 \ 1790 diagnostic_pd(intx, InlineFrequencyCount, \ 1791 "Count of call site execution necessary to trigger frequent " \ 1792 "inlining") \ 1793 range(0, max_jint) \ 1794 \ 1795 develop(intx, InlineThrowCount, 50, \ 1796 "Force inlining of interpreted methods that throw this often") \ 1797 range(0, max_jint) \ 1798 \ 1799 develop(intx, InlineThrowMaxSize, 200, \ 1800 "Force inlining of throwing methods smaller than this") \ 1801 range(0, max_jint) \ 1802 \ 1803 develop(intx, ProfilerNodeSize, 1024, \ 1804 "Size in K to allocate for the Profile Nodes of each thread") \ 1805 range(0, 1024) \ 1806 \ 1807 product_pd(size_t, MetaspaceSize, \ 1808 "Initial threshold (in bytes) at which a garbage collection " \ 1809 "is done to reduce Metaspace usage") \ 1810 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 1811 \ 1812 product(size_t, MaxMetaspaceSize, max_uintx, \ 1813 "Maximum size of Metaspaces (in bytes)") \ 1814 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 1815 \ 1816 product(size_t, CompressedClassSpaceSize, 1*G, \ 1817 "Maximum size of class area in Metaspace when compressed " \ 1818 "class pointers are used") \ 1819 range(1*M, 3*G) \ 1820 \ 1821 manageable(uintx, MinHeapFreeRatio, 40, \ 1822 "The minimum percentage of heap free after GC to avoid expansion."\ 1823 " For most GCs this applies to the old generation. In G1 and" \ 1824 " ParallelGC it applies to the whole heap.") \ 1825 range(0, 100) \ 1826 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 1827 \ 1828 manageable(uintx, MaxHeapFreeRatio, 70, \ 1829 "The maximum percentage of heap free after GC to avoid shrinking."\ 1830 " For most GCs this applies to the old generation. In G1 and" \ 1831 " ParallelGC it applies to the whole heap.") \ 1832 range(0, 100) \ 1833 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 1834 \ 1835 product(bool, ShrinkHeapInSteps, true, \ 1836 "When disabled, informs the GC to shrink the java heap directly" \ 1837 " to the target size at the next full GC rather than requiring" \ 1838 " smaller steps during multiple full GCs.") \ 1839 \ 1840 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 1841 "Number of milliseconds per MB of free space in the heap") \ 1842 range(0, max_intx) \ 1843 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 1844 \ 1845 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 1846 "The minimum change in heap space due to GC (in bytes)") \ 1847 range(0, max_uintx) \ 1848 \ 1849 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 1850 "The minimum expansion of Metaspace (in bytes)") \ 1851 range(0, max_uintx) \ 1852 \ 1853 product(uintx, MaxMetaspaceFreeRatio, 70, \ 1854 "The maximum percentage of Metaspace free after GC to avoid " \ 1855 "shrinking") \ 1856 range(0, 100) \ 1857 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 1858 \ 1859 product(uintx, MinMetaspaceFreeRatio, 40, \ 1860 "The minimum percentage of Metaspace free after GC to avoid " \ 1861 "expansion") \ 1862 range(0, 99) \ 1863 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 1864 \ 1865 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 1866 "The maximum expansion of Metaspace without full GC (in bytes)") \ 1867 range(0, max_uintx) \ 1868 \ 1869 /* stack parameters */ \ 1870 product_pd(intx, StackYellowPages, \ 1871 "Number of yellow zone (recoverable overflows) pages of size " \ 1872 "4KB. If pages are bigger yellow zone is aligned up.") \ 1873 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 1874 \ 1875 product_pd(intx, StackRedPages, \ 1876 "Number of red zone (unrecoverable overflows) pages of size " \ 1877 "4KB. If pages are bigger red zone is aligned up.") \ 1878 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 1879 \ 1880 product_pd(intx, StackReservedPages, \ 1881 "Number of reserved zone (reserved to annotated methods) pages" \ 1882 " of size 4KB. If pages are bigger reserved zone is aligned up.") \ 1883 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ 1884 \ 1885 product(bool, RestrictReservedStack, true, \ 1886 "Restrict @ReservedStackAccess to trusted classes") \ 1887 \ 1888 /* greater stack shadow pages can't generate instruction to bang stack */ \ 1889 product_pd(intx, StackShadowPages, \ 1890 "Number of shadow zone (for overflow checking) pages of size " \ 1891 "4KB. If pages are bigger shadow zone is aligned up. " \ 1892 "This should exceed the depth of the VM and native call stack.") \ 1893 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 1894 \ 1895 product_pd(intx, ThreadStackSize, \ 1896 "Thread Stack Size (in Kbytes)") \ 1897 range(0, 1 * M) \ 1898 \ 1899 product_pd(intx, VMThreadStackSize, \ 1900 "Non-Java Thread Stack Size (in Kbytes)") \ 1901 range(0, max_intx/(1 * K)) \ 1902 \ 1903 product_pd(intx, CompilerThreadStackSize, \ 1904 "Compiler Thread Stack Size (in Kbytes)") \ 1905 range(0, max_intx/(1 * K)) \ 1906 \ 1907 develop_pd(size_t, JVMInvokeMethodSlack, \ 1908 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 1909 \ 1910 /* code cache parameters */ \ 1911 develop_pd(uintx, CodeCacheSegmentSize, \ 1912 "Code cache segment size (in bytes) - smallest unit of " \ 1913 "allocation") \ 1914 range(1, 1024) \ 1915 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 1916 \ 1917 develop_pd(intx, CodeEntryAlignment, \ 1918 "Code entry alignment for generated code (in bytes)") \ 1919 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 1920 \ 1921 product_pd(intx, OptoLoopAlignment, \ 1922 "Align inner loops to zero relative to this modulus") \ 1923 range(1, 16) \ 1924 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 1925 \ 1926 product_pd(uintx, InitialCodeCacheSize, \ 1927 "Initial code cache size (in bytes)") \ 1928 range(os::vm_page_size(), max_uintx) \ 1929 \ 1930 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 1931 "Minimum code cache size (in bytes) required to start VM.") \ 1932 range(0, max_uintx) \ 1933 \ 1934 product(bool, SegmentedCodeCache, false, \ 1935 "Use a segmented code cache") \ 1936 \ 1937 product_pd(uintx, ReservedCodeCacheSize, \ 1938 "Reserved code cache size (in bytes) - maximum code cache size") \ 1939 range(os::vm_page_size(), max_uintx) \ 1940 \ 1941 product_pd(uintx, NonProfiledCodeHeapSize, \ 1942 "Size of code heap with non-profiled methods (in bytes)") \ 1943 range(0, max_uintx) \ 1944 \ 1945 product_pd(uintx, ProfiledCodeHeapSize, \ 1946 "Size of code heap with profiled methods (in bytes)") \ 1947 range(0, max_uintx) \ 1948 \ 1949 product_pd(uintx, NonNMethodCodeHeapSize, \ 1950 "Size of code heap with non-nmethods (in bytes)") \ 1951 range(os::vm_page_size(), max_uintx) \ 1952 \ 1953 product_pd(uintx, CodeCacheExpansionSize, \ 1954 "Code cache expansion size (in bytes)") \ 1955 range(32*K, max_uintx) \ 1956 \ 1957 diagnostic_pd(uintx, CodeCacheMinBlockLength, \ 1958 "Minimum number of segments in a code cache block") \ 1959 range(1, 100) \ 1960 \ 1961 notproduct(bool, ExitOnFullCodeCache, false, \ 1962 "Exit the VM if we fill the code cache") \ 1963 \ 1964 product(bool, UseCodeCacheFlushing, true, \ 1965 "Remove cold/old nmethods from the code cache") \ 1966 \ 1967 product(uintx, StartAggressiveSweepingAt, 10, \ 1968 "Start aggressive sweeping if X[%] of the code cache is free." \ 1969 "Segmented code cache: X[%] of the non-profiled heap." \ 1970 "Non-segmented code cache: X[%] of the total code cache") \ 1971 range(0, 100) \ 1972 \ 1973 /* AOT parameters */ \ 1974 experimental(bool, UseAOT, false, \ 1975 "Use AOT compiled files") \ 1976 \ 1977 experimental(ccstrlist, AOTLibrary, NULL, \ 1978 "AOT library") \ 1979 \ 1980 experimental(bool, PrintAOT, false, \ 1981 "Print used AOT klasses and methods") \ 1982 \ 1983 notproduct(bool, PrintAOTStatistics, false, \ 1984 "Print AOT statistics") \ 1985 \ 1986 diagnostic(bool, UseAOTStrictLoading, false, \ 1987 "Exit the VM if any of the AOT libraries has invalid config") \ 1988 \ 1989 product(bool, CalculateClassFingerprint, false, \ 1990 "Calculate class fingerprint") \ 1991 \ 1992 /* interpreter debugging */ \ 1993 develop(intx, BinarySwitchThreshold, 5, \ 1994 "Minimal number of lookupswitch entries for rewriting to binary " \ 1995 "switch") \ 1996 \ 1997 develop(intx, StopInterpreterAt, 0, \ 1998 "Stop interpreter execution at specified bytecode number") \ 1999 \ 2000 develop(intx, TraceBytecodesAt, 0, \ 2001 "Trace bytecodes starting with specified bytecode number") \ 2002 \ 2003 /* compiler interface */ \ 2004 develop(intx, CIStart, 0, \ 2005 "The id of the first compilation to permit") \ 2006 \ 2007 develop(intx, CIStop, max_jint, \ 2008 "The id of the last compilation to permit") \ 2009 \ 2010 develop(intx, CIStartOSR, 0, \ 2011 "The id of the first osr compilation to permit " \ 2012 "(CICountOSR must be on)") \ 2013 \ 2014 develop(intx, CIStopOSR, max_jint, \ 2015 "The id of the last osr compilation to permit " \ 2016 "(CICountOSR must be on)") \ 2017 \ 2018 develop(intx, CIBreakAtOSR, -1, \ 2019 "The id of osr compilation to break at") \ 2020 \ 2021 develop(intx, CIBreakAt, -1, \ 2022 "The id of compilation to break at") \ 2023 \ 2024 product(ccstrlist, CompileOnly, "", \ 2025 "List of methods (pkg/class.name) to restrict compilation to") \ 2026 \ 2027 product(ccstr, CompileCommandFile, NULL, \ 2028 "Read compiler commands from this file [.hotspot_compiler]") \ 2029 \ 2030 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 2031 "Read compiler directives from this file") \ 2032 \ 2033 product(ccstrlist, CompileCommand, "", \ 2034 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 2035 \ 2036 develop(bool, ReplayCompiles, false, \ 2037 "Enable replay of compilations from ReplayDataFile") \ 2038 \ 2039 product(ccstr, ReplayDataFile, NULL, \ 2040 "File containing compilation replay information" \ 2041 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 2042 \ 2043 product(ccstr, InlineDataFile, NULL, \ 2044 "File containing inlining replay information" \ 2045 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 2046 \ 2047 develop(intx, ReplaySuppressInitializers, 2, \ 2048 "Control handling of class initialization during replay: " \ 2049 "0 - don't do anything special; " \ 2050 "1 - treat all class initializers as empty; " \ 2051 "2 - treat class initializers for application classes as empty; " \ 2052 "3 - allow all class initializers to run during bootstrap but " \ 2053 " pretend they are empty after starting replay") \ 2054 range(0, 3) \ 2055 \ 2056 develop(bool, ReplayIgnoreInitErrors, false, \ 2057 "Ignore exceptions thrown during initialization for replay") \ 2058 \ 2059 product(bool, DumpReplayDataOnError, true, \ 2060 "Record replay data for crashing compiler threads") \ 2061 \ 2062 product(bool, CICompilerCountPerCPU, false, \ 2063 "1 compiler thread for log(N CPUs)") \ 2064 \ 2065 develop(intx, CIFireOOMAt, -1, \ 2066 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 2067 "(non-negative value throws OOM after this many CI accesses " \ 2068 "in each compile)") \ 2069 notproduct(intx, CICrashAt, -1, \ 2070 "id of compilation to trigger assert in compiler thread for " \ 2071 "the purpose of testing, e.g. generation of replay data") \ 2072 notproduct(bool, CIObjectFactoryVerify, false, \ 2073 "enable potentially expensive verification in ciObjectFactory") \ 2074 \ 2075 diagnostic(bool, AbortVMOnCompilationFailure, false, \ 2076 "Abort VM when method had failed to compile.") \ 2077 \ 2078 /* Priorities */ \ 2079 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 2080 \ 2081 product(intx, ThreadPriorityPolicy, 0, \ 2082 "0 : Normal. "\ 2083 " VM chooses priorities that are appropriate for normal "\ 2084 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 2085 " to normal native priority. Java priorities below " \ 2086 " NORM_PRIORITY map to lower native priority values. On "\ 2087 " Windows applications are allowed to use higher native "\ 2088 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 2089 " not use the highest possible native priority, "\ 2090 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 2091 " system threads. On Linux thread priorities are ignored "\ 2092 " because the OS does not support static priority in "\ 2093 " SCHED_OTHER scheduling class which is the only choice for "\ 2094 " non-root, non-realtime applications. "\ 2095 "1 : Aggressive. "\ 2096 " Java thread priorities map over to the entire range of "\ 2097 " native thread priorities. Higher Java thread priorities map "\ 2098 " to higher native thread priorities. This policy should be "\ 2099 " used with care, as sometimes it can cause performance "\ 2100 " degradation in the application and/or the entire system. On "\ 2101 " Linux/BSD/macOS this policy requires root privilege or an "\ 2102 " extended capability.") \ 2103 range(0, 1) \ 2104 \ 2105 product(bool, ThreadPriorityVerbose, false, \ 2106 "Print priority changes") \ 2107 \ 2108 product(intx, CompilerThreadPriority, -1, \ 2109 "The native priority at which compiler threads should run " \ 2110 "(-1 means no change)") \ 2111 range(min_jint, max_jint) \ 2112 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 2113 \ 2114 product(intx, VMThreadPriority, -1, \ 2115 "The native priority at which the VM thread should run " \ 2116 "(-1 means no change)") \ 2117 range(-1, 127) \ 2118 \ 2119 product(bool, CompilerThreadHintNoPreempt, false, \ 2120 "(Solaris only) Give compiler threads an extra quanta") \ 2121 \ 2122 product(bool, VMThreadHintNoPreempt, false, \ 2123 "(Solaris only) Give VM thread an extra quanta") \ 2124 \ 2125 product(intx, JavaPriority1_To_OSPriority, -1, \ 2126 "Map Java priorities to OS priorities") \ 2127 range(-1, 127) \ 2128 \ 2129 product(intx, JavaPriority2_To_OSPriority, -1, \ 2130 "Map Java priorities to OS priorities") \ 2131 range(-1, 127) \ 2132 \ 2133 product(intx, JavaPriority3_To_OSPriority, -1, \ 2134 "Map Java priorities to OS priorities") \ 2135 range(-1, 127) \ 2136 \ 2137 product(intx, JavaPriority4_To_OSPriority, -1, \ 2138 "Map Java priorities to OS priorities") \ 2139 range(-1, 127) \ 2140 \ 2141 product(intx, JavaPriority5_To_OSPriority, -1, \ 2142 "Map Java priorities to OS priorities") \ 2143 range(-1, 127) \ 2144 \ 2145 product(intx, JavaPriority6_To_OSPriority, -1, \ 2146 "Map Java priorities to OS priorities") \ 2147 range(-1, 127) \ 2148 \ 2149 product(intx, JavaPriority7_To_OSPriority, -1, \ 2150 "Map Java priorities to OS priorities") \ 2151 range(-1, 127) \ 2152 \ 2153 product(intx, JavaPriority8_To_OSPriority, -1, \ 2154 "Map Java priorities to OS priorities") \ 2155 range(-1, 127) \ 2156 \ 2157 product(intx, JavaPriority9_To_OSPriority, -1, \ 2158 "Map Java priorities to OS priorities") \ 2159 range(-1, 127) \ 2160 \ 2161 product(intx, JavaPriority10_To_OSPriority,-1, \ 2162 "Map Java priorities to OS priorities") \ 2163 range(-1, 127) \ 2164 \ 2165 experimental(bool, UseCriticalJavaThreadPriority, false, \ 2166 "Java thread priority 10 maps to critical scheduling priority") \ 2167 \ 2168 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 2169 "Compiler thread(s) run at critical scheduling priority") \ 2170 \ 2171 experimental(bool, UseCriticalCMSThreadPriority, false, \ 2172 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 2173 \ 2174 /* compiler debugging */ \ 2175 notproduct(intx, CompileTheWorldStartAt, 1, \ 2176 "First class to consider when using +CompileTheWorld") \ 2177 \ 2178 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 2179 "Last class to consider when using +CompileTheWorld") \ 2180 \ 2181 develop(intx, NewCodeParameter, 0, \ 2182 "Testing Only: Create a dedicated integer parameter before " \ 2183 "putback") \ 2184 \ 2185 /* new oopmap storage allocation */ \ 2186 develop(intx, MinOopMapAllocation, 8, \ 2187 "Minimum number of OopMap entries in an OopMapSet") \ 2188 \ 2189 /* Background Compilation */ \ 2190 develop(intx, LongCompileThreshold, 50, \ 2191 "Used with +TraceLongCompiles") \ 2192 \ 2193 /* recompilation */ \ 2194 product_pd(intx, CompileThreshold, \ 2195 "number of interpreted method invocations before (re-)compiling") \ 2196 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 2197 \ 2198 product(double, CompileThresholdScaling, 1.0, \ 2199 "Factor to control when first compilation happens " \ 2200 "(both with and without tiered compilation): " \ 2201 "values greater than 1.0 delay counter overflow, " \ 2202 "values between 0 and 1.0 rush counter overflow, " \ 2203 "value of 1.0 leaves compilation thresholds unchanged " \ 2204 "value of 0.0 is equivalent to -Xint. " \ 2205 "" \ 2206 "Flag can be set as per-method option. " \ 2207 "If a value is specified for a method, compilation thresholds " \ 2208 "for that method are scaled by both the value of the global flag "\ 2209 "and the value of the per-method flag.") \ 2210 range(0.0, DBL_MAX) \ 2211 \ 2212 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 2213 "Interpreter (tier 0) invocation notification frequency") \ 2214 range(0, 30) \ 2215 \ 2216 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 2217 "C1 without MDO (tier 2) invocation notification frequency") \ 2218 range(0, 30) \ 2219 \ 2220 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 2221 "C1 with MDO profiling (tier 3) invocation notification " \ 2222 "frequency") \ 2223 range(0, 30) \ 2224 \ 2225 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 2226 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 2227 range(0, 30) \ 2228 \ 2229 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 2230 "Interpreter (tier 0) invocation notification frequency") \ 2231 range(0, 30) \ 2232 \ 2233 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 2234 "C1 without MDO (tier 2) invocation notification frequency") \ 2235 range(0, 30) \ 2236 \ 2237 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 2238 "C1 with MDO profiling (tier 3) invocation notification " \ 2239 "frequency") \ 2240 range(0, 30) \ 2241 \ 2242 product(intx, Tier2CompileThreshold, 0, \ 2243 "threshold at which tier 2 compilation is invoked") \ 2244 range(0, max_jint) \ 2245 \ 2246 product(intx, Tier2BackEdgeThreshold, 0, \ 2247 "Back edge threshold at which tier 2 compilation is invoked") \ 2248 range(0, max_jint) \ 2249 \ 2250 product(intx, Tier3InvocationThreshold, 200, \ 2251 "Compile if number of method invocations crosses this " \ 2252 "threshold") \ 2253 range(0, max_jint) \ 2254 \ 2255 product(intx, Tier3MinInvocationThreshold, 100, \ 2256 "Minimum invocation to compile at tier 3") \ 2257 range(0, max_jint) \ 2258 \ 2259 product(intx, Tier3CompileThreshold, 2000, \ 2260 "Threshold at which tier 3 compilation is invoked (invocation " \ 2261 "minimum must be satisfied)") \ 2262 range(0, max_jint) \ 2263 \ 2264 product(intx, Tier3BackEdgeThreshold, 60000, \ 2265 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 2266 range(0, max_jint) \ 2267 \ 2268 product(intx, Tier3AOTInvocationThreshold, 10000, \ 2269 "Compile if number of method invocations crosses this " \ 2270 "threshold if coming from AOT") \ 2271 range(0, max_jint) \ 2272 \ 2273 product(intx, Tier3AOTMinInvocationThreshold, 1000, \ 2274 "Minimum invocation to compile at tier 3 if coming from AOT") \ 2275 range(0, max_jint) \ 2276 \ 2277 product(intx, Tier3AOTCompileThreshold, 15000, \ 2278 "Threshold at which tier 3 compilation is invoked (invocation " \ 2279 "minimum must be satisfied) if coming from AOT") \ 2280 range(0, max_jint) \ 2281 \ 2282 product(intx, Tier3AOTBackEdgeThreshold, 120000, \ 2283 "Back edge threshold at which tier 3 OSR compilation is invoked " \ 2284 "if coming from AOT") \ 2285 range(0, max_jint) \ 2286 \ 2287 product(intx, Tier4InvocationThreshold, 5000, \ 2288 "Compile if number of method invocations crosses this " \ 2289 "threshold") \ 2290 range(0, max_jint) \ 2291 \ 2292 product(intx, Tier4MinInvocationThreshold, 600, \ 2293 "Minimum invocation to compile at tier 4") \ 2294 range(0, max_jint) \ 2295 \ 2296 product(intx, Tier4CompileThreshold, 15000, \ 2297 "Threshold at which tier 4 compilation is invoked (invocation " \ 2298 "minimum must be satisfied") \ 2299 range(0, max_jint) \ 2300 \ 2301 product(intx, Tier4BackEdgeThreshold, 40000, \ 2302 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 2303 range(0, max_jint) \ 2304 \ 2305 product(intx, Tier3DelayOn, 5, \ 2306 "If C2 queue size grows over this amount per compiler thread " \ 2307 "stop compiling at tier 3 and start compiling at tier 2") \ 2308 range(0, max_jint) \ 2309 \ 2310 product(intx, Tier3DelayOff, 2, \ 2311 "If C2 queue size is less than this amount per compiler thread " \ 2312 "allow methods compiled at tier 2 transition to tier 3") \ 2313 range(0, max_jint) \ 2314 \ 2315 product(intx, Tier3LoadFeedback, 5, \ 2316 "Tier 3 thresholds will increase twofold when C1 queue size " \ 2317 "reaches this amount per compiler thread") \ 2318 range(0, max_jint) \ 2319 \ 2320 product(intx, Tier4LoadFeedback, 3, \ 2321 "Tier 4 thresholds will increase twofold when C2 queue size " \ 2322 "reaches this amount per compiler thread") \ 2323 range(0, max_jint) \ 2324 \ 2325 product(intx, TieredCompileTaskTimeout, 50, \ 2326 "Kill compile task if method was not used within " \ 2327 "given timeout in milliseconds") \ 2328 range(0, max_intx) \ 2329 \ 2330 product(intx, TieredStopAtLevel, 4, \ 2331 "Stop at given compilation level") \ 2332 range(0, 4) \ 2333 \ 2334 product(intx, Tier0ProfilingStartPercentage, 200, \ 2335 "Start profiling in interpreter if the counters exceed tier 3 " \ 2336 "thresholds by the specified percentage") \ 2337 range(0, max_jint) \ 2338 \ 2339 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 2340 "Increase the compile threshold for C1 compilation if the code " \ 2341 "cache is filled by the specified percentage") \ 2342 range(0, 99) \ 2343 \ 2344 product(intx, TieredRateUpdateMinTime, 1, \ 2345 "Minimum rate sampling interval (in milliseconds)") \ 2346 range(0, max_intx) \ 2347 \ 2348 product(intx, TieredRateUpdateMaxTime, 25, \ 2349 "Maximum rate sampling interval (in milliseconds)") \ 2350 range(0, max_intx) \ 2351 \ 2352 product_pd(bool, TieredCompilation, \ 2353 "Enable tiered compilation") \ 2354 \ 2355 product(bool, PrintTieredEvents, false, \ 2356 "Print tiered events notifications") \ 2357 \ 2358 product_pd(intx, OnStackReplacePercentage, \ 2359 "NON_TIERED number of method invocations/branches (expressed as " \ 2360 "% of CompileThreshold) before (re-)compiling OSR code") \ 2361 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 2362 \ 2363 product(intx, InterpreterProfilePercentage, 33, \ 2364 "NON_TIERED number of method invocations/branches (expressed as " \ 2365 "% of CompileThreshold) before profiling in the interpreter") \ 2366 range(0, 100) \ 2367 \ 2368 develop(intx, MaxRecompilationSearchLength, 10, \ 2369 "The maximum number of frames to inspect when searching for " \ 2370 "recompilee") \ 2371 \ 2372 develop(intx, MaxInterpretedSearchLength, 3, \ 2373 "The maximum number of interpreted frames to skip when searching "\ 2374 "for recompilee") \ 2375 \ 2376 develop(intx, DesiredMethodLimit, 8000, \ 2377 "The desired maximum method size (in bytecodes) after inlining") \ 2378 \ 2379 develop(intx, HugeMethodLimit, 8000, \ 2380 "Don't compile methods larger than this if " \ 2381 "+DontCompileHugeMethods") \ 2382 \ 2383 /* New JDK 1.4 reflection implementation */ \ 2384 \ 2385 develop(intx, FastSuperclassLimit, 8, \ 2386 "Depth of hardwired instanceof accelerator array") \ 2387 \ 2388 /* Properties for Java libraries */ \ 2389 \ 2390 product(uint64_t, MaxDirectMemorySize, 0, \ 2391 "Maximum total size of NIO direct-buffer allocations") \ 2392 range(0, max_jlong) \ 2393 \ 2394 /* Flags used for temporary code during development */ \ 2395 \ 2396 diagnostic(bool, UseNewCode, false, \ 2397 "Testing Only: Use the new version while testing") \ 2398 \ 2399 diagnostic(bool, UseNewCode2, false, \ 2400 "Testing Only: Use the new version while testing") \ 2401 \ 2402 diagnostic(bool, UseNewCode3, false, \ 2403 "Testing Only: Use the new version while testing") \ 2404 \ 2405 /* flags for performance data collection */ \ 2406 \ 2407 product(bool, UsePerfData, true, \ 2408 "Flag to disable jvmstat instrumentation for performance testing "\ 2409 "and problem isolation purposes") \ 2410 \ 2411 product(bool, PerfDataSaveToFile, false, \ 2412 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 2413 \ 2414 product(ccstr, PerfDataSaveFile, NULL, \ 2415 "Save PerfData memory to the specified absolute pathname. " \ 2416 "The string %p in the file name (if present) " \ 2417 "will be replaced by pid") \ 2418 \ 2419 product(intx, PerfDataSamplingInterval, 50, \ 2420 "Data sampling interval (in milliseconds)") \ 2421 range(PeriodicTask::min_interval, max_jint) \ 2422 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 2423 \ 2424 product(bool, PerfDisableSharedMem, false, \ 2425 "Store performance data in standard memory") \ 2426 \ 2427 product(intx, PerfDataMemorySize, 32*K, \ 2428 "Size of performance data memory region. Will be rounded " \ 2429 "up to a multiple of the native os page size.") \ 2430 range(128, 32*64*K) \ 2431 \ 2432 product(intx, PerfMaxStringConstLength, 1024, \ 2433 "Maximum PerfStringConstant string length before truncation") \ 2434 range(32, 32*K) \ 2435 \ 2436 product(bool, PerfAllowAtExitRegistration, false, \ 2437 "Allow registration of atexit() methods") \ 2438 \ 2439 product(bool, PerfBypassFileSystemCheck, false, \ 2440 "Bypass Win32 file system criteria checks (Windows Only)") \ 2441 \ 2442 product(intx, UnguardOnExecutionViolation, 0, \ 2443 "Unguard page and retry on no-execute fault (Win32 only) " \ 2444 "0=off, 1=conservative, 2=aggressive") \ 2445 range(0, 2) \ 2446 \ 2447 /* Serviceability Support */ \ 2448 \ 2449 product(bool, ManagementServer, false, \ 2450 "Create JMX Management Server") \ 2451 \ 2452 product(bool, DisableAttachMechanism, false, \ 2453 "Disable mechanism that allows tools to attach to this VM") \ 2454 \ 2455 product(bool, StartAttachListener, false, \ 2456 "Always start Attach Listener at VM startup") \ 2457 \ 2458 product(bool, EnableDynamicAgentLoading, true, \ 2459 "Allow tools to load agents with the attach mechanism") \ 2460 \ 2461 manageable(bool, PrintConcurrentLocks, false, \ 2462 "Print java.util.concurrent locks in thread dump") \ 2463 \ 2464 product(bool, TransmitErrorReport, false, \ 2465 "Enable error report transmission on erroneous termination") \ 2466 \ 2467 product(ccstr, ErrorReportServer, NULL, \ 2468 "Override built-in error report server address") \ 2469 \ 2470 /* Shared spaces */ \ 2471 \ 2472 product(bool, UseSharedSpaces, true, \ 2473 "Use shared spaces for metadata") \ 2474 \ 2475 product(bool, VerifySharedSpaces, false, \ 2476 "Verify shared spaces (false for default archive, true for " \ 2477 "archive specified by -XX:SharedArchiveFile)") \ 2478 \ 2479 product(bool, RequireSharedSpaces, false, \ 2480 "Require shared spaces for metadata") \ 2481 \ 2482 product(bool, DumpSharedSpaces, false, \ 2483 "Special mode: JVM reads a class list, loads classes, builds " \ 2484 "shared spaces, and dumps the shared spaces to a file to be " \ 2485 "used in future JVM runs") \ 2486 \ 2487 product(bool, PrintSharedArchiveAndExit, false, \ 2488 "Print shared archive file contents") \ 2489 \ 2490 product(bool, PrintSharedDictionary, false, \ 2491 "If PrintSharedArchiveAndExit is true, also print the shared " \ 2492 "dictionary") \ 2493 \ 2494 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 2495 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 2496 "Address to allocate shared memory region for class data") \ 2497 range(0, SIZE_MAX) \ 2498 \ 2499 product(ccstr, SharedArchiveConfigFile, NULL, \ 2500 "Data to add to the CDS archive file") \ 2501 \ 2502 product(uintx, SharedSymbolTableBucketSize, 4, \ 2503 "Average number of symbols per bucket in shared table") \ 2504 range(2, 246) \ 2505 \ 2506 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, true, \ 2507 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 2508 "classes. Just exclude them from the shared dictionary.") \ 2509 \ 2510 diagnostic(bool, PrintMethodHandleStubs, false, \ 2511 "Print generated stub code for method handles") \ 2512 \ 2513 develop(bool, TraceMethodHandles, false, \ 2514 "trace internal method handle operations") \ 2515 \ 2516 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 2517 "perform extra checks when constructing method handles") \ 2518 \ 2519 diagnostic(bool, ShowHiddenFrames, false, \ 2520 "show method handle implementation frames (usually hidden)") \ 2521 \ 2522 experimental(bool, TrustFinalNonStaticFields, false, \ 2523 "trust final non-static declarations for constant folding") \ 2524 \ 2525 diagnostic(bool, FoldStableValues, true, \ 2526 "Optimize loads from stable fields (marked w/ @Stable)") \ 2527 \ 2528 develop(bool, TraceInvokeDynamic, false, \ 2529 "trace internal invoke dynamic operations") \ 2530 \ 2531 diagnostic(int, UseBootstrapCallInfo, 1, \ 2532 "0: when resolving InDy or ConDy, force all BSM arguments to be " \ 2533 "resolved before the bootstrap method is called; 1: when a BSM " \ 2534 "that may accept a BootstrapCallInfo is detected, use that API " \ 2535 "to pass BSM arguments, which allows the BSM to delay their " \ 2536 "resolution; 2+: stress test the BCI API by calling more BSMs " \ 2537 "via that API, instead of with the eagerly-resolved array.") \ 2538 \ 2539 diagnostic(bool, PauseAtStartup, false, \ 2540 "Causes the VM to pause at startup time and wait for the pause " \ 2541 "file to be removed (default: ./vm.paused.<pid>)") \ 2542 \ 2543 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 2544 "The file to create and for whose removal to await when pausing " \ 2545 "at startup. (default: ./vm.paused.<pid>)") \ 2546 \ 2547 diagnostic(bool, PauseAtExit, false, \ 2548 "Pause and wait for keypress on exit if a debugger is attached") \ 2549 \ 2550 product(bool, ExtendedDTraceProbes, false, \ 2551 "Enable performance-impacting dtrace probes") \ 2552 \ 2553 product(bool, DTraceMethodProbes, false, \ 2554 "Enable dtrace probes for method-entry and method-exit") \ 2555 \ 2556 product(bool, DTraceAllocProbes, false, \ 2557 "Enable dtrace probes for object allocation") \ 2558 \ 2559 product(bool, DTraceMonitorProbes, false, \ 2560 "Enable dtrace probes for monitor events") \ 2561 \ 2562 product(bool, RelaxAccessControlCheck, false, \ 2563 "Relax the access control checks in the verifier") \ 2564 \ 2565 product(uintx, StringTableSize, defaultStringTableSize, \ 2566 "Number of buckets in the interned String table " \ 2567 "(will be rounded to nearest higher power of 2)") \ 2568 range(minimumStringTableSize, 16777216ul) \ 2569 \ 2570 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 2571 "Number of buckets in the JVM internal Symbol table") \ 2572 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 2573 \ 2574 product(bool, UseStringDeduplication, false, \ 2575 "Use string deduplication") \ 2576 \ 2577 product(uintx, StringDeduplicationAgeThreshold, 3, \ 2578 "A string must reach this age (or be promoted to an old region) " \ 2579 "to be considered for deduplication") \ 2580 range(1, markOopDesc::max_age) \ 2581 \ 2582 diagnostic(bool, StringDeduplicationResizeALot, false, \ 2583 "Force table resize every time the table is scanned") \ 2584 \ 2585 diagnostic(bool, StringDeduplicationRehashALot, false, \ 2586 "Force table rehash every time the table is scanned") \ 2587 \ 2588 diagnostic(bool, WhiteBoxAPI, false, \ 2589 "Enable internal testing APIs") \ 2590 \ 2591 experimental(intx, SurvivorAlignmentInBytes, 0, \ 2592 "Default survivor space alignment in bytes") \ 2593 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 2594 \ 2595 product(bool , AllowNonVirtualCalls, false, \ 2596 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 2597 \ 2598 product(ccstr, DumpLoadedClassList, NULL, \ 2599 "Dump the names all loaded classes, that could be stored into " \ 2600 "the CDS archive, in the specified file") \ 2601 \ 2602 product(ccstr, SharedClassListFile, NULL, \ 2603 "Override the default CDS class list") \ 2604 \ 2605 product(ccstr, SharedArchiveFile, NULL, \ 2606 "Override the default location of the CDS archive file") \ 2607 \ 2608 product(ccstr, ExtraSharedClassListFile, NULL, \ 2609 "Extra classlist for building the CDS archive file") \ 2610 \ 2611 experimental(size_t, ArrayAllocatorMallocLimit, \ 2612 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 2613 "Allocation less than this value will be allocated " \ 2614 "using malloc. Larger allocations will use mmap.") \ 2615 \ 2616 experimental(bool, AlwaysAtomicAccesses, false, \ 2617 "Accesses to all variables should always be atomic") \ 2618 \ 2619 diagnostic(bool, UseUnalignedAccesses, false, \ 2620 "Use unaligned memory accesses in Unsafe") \ 2621 \ 2622 product_pd(bool, PreserveFramePointer, \ 2623 "Use the FP register for holding the frame pointer " \ 2624 "and not as a general purpose register.") \ 2625 \ 2626 diagnostic(bool, CheckIntrinsics, true, \ 2627 "When a class C is loaded, check that " \ 2628 "(1) all intrinsics defined by the VM for class C are present "\ 2629 "in the loaded class file and are marked with the " \ 2630 "@HotSpotIntrinsicCandidate annotation, that " \ 2631 "(2) there is an intrinsic registered for all loaded methods " \ 2632 "that are annotated with the @HotSpotIntrinsicCandidate " \ 2633 "annotation, and that " \ 2634 "(3) no orphan methods exist for class C (i.e., methods for " \ 2635 "which the VM declares an intrinsic but that are not declared "\ 2636 "in the loaded class C. " \ 2637 "Check (3) is available only in debug builds.") \ 2638 \ 2639 diagnostic_pd(intx, InitArrayShortSize, \ 2640 "Threshold small size (in bytes) for clearing arrays. " \ 2641 "Anything this size or smaller may get converted to discrete " \ 2642 "scalar stores.") \ 2643 range(0, max_intx) \ 2644 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ 2645 \ 2646 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 2647 "Disable backwards compatibility for compile commands.") \ 2648 \ 2649 diagnostic(bool, CompilerDirectivesPrint, false, \ 2650 "Print compiler directives on installation.") \ 2651 diagnostic(int, CompilerDirectivesLimit, 50, \ 2652 "Limit on number of compiler directives.") \ 2653 \ 2654 product(ccstr, AllocateHeapAt, NULL, \ 2655 "Path to the directoy where a temporary file will be created " \ 2656 "to use as the backing store for Java Heap.") \ 2657 \ 2658 develop(bool, VerifyMetaspace, false, \ 2659 "Verify metaspace on chunk movements.") \ 2660 \ 2661 diagnostic(bool, ShowRegistersOnAssert, false, \ 2662 "On internal errors, include registers in error report.") \ 2663 \ 2664 diagnostic(bool, UseSwitchProfiling, true, \ 2665 "leverage profiling for table/lookup switch") \ 2666 \ 2667 JFR_ONLY(product(bool, FlightRecorder, false, \ 2668 "Enable Flight Recorder")) \ 2669 \ 2670 JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL, \ 2671 "Flight Recorder options")) \ 2672 \ 2673 JFR_ONLY(product(ccstr, StartFlightRecording, NULL, \ 2674 "Start flight recording with options")) \ 2675 \ 2676 experimental(bool, UseFastUnorderedTimeStamps, false, \ 2677 "Use platform unstable time where supported for timestamps only") 2678 2679 #define VM_FLAGS(develop, \ 2680 develop_pd, \ 2681 product, \ 2682 product_pd, \ 2683 diagnostic, \ 2684 diagnostic_pd, \ 2685 experimental, \ 2686 notproduct, \ 2687 manageable, \ 2688 product_rw, \ 2689 lp64_product, \ 2690 range, \ 2691 constraint, \ 2692 writeable) \ 2693 \ 2694 RUNTIME_FLAGS( \ 2695 develop, \ 2696 develop_pd, \ 2697 product, \ 2698 product_pd, \ 2699 diagnostic, \ 2700 diagnostic_pd, \ 2701 experimental, \ 2702 notproduct, \ 2703 manageable, \ 2704 product_rw, \ 2705 lp64_product, \ 2706 range, \ 2707 constraint, \ 2708 writeable) \ 2709 \ 2710 GC_FLAGS( \ 2711 develop, \ 2712 develop_pd, \ 2713 product, \ 2714 product_pd, \ 2715 diagnostic, \ 2716 diagnostic_pd, \ 2717 experimental, \ 2718 notproduct, \ 2719 manageable, \ 2720 product_rw, \ 2721 lp64_product, \ 2722 range, \ 2723 constraint, \ 2724 writeable) \ 2725 2726 /* 2727 * Macros for factoring of globals 2728 */ 2729 2730 // Interface macros 2731 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2732 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 2733 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 2734 #define DECLARE_PD_DIAGNOSTIC_FLAG(type, name, doc) extern "C" type name; 2735 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 2736 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 2737 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 2738 #ifdef PRODUCT 2739 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 2740 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 2741 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 2742 #else 2743 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 2744 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 2745 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2746 #endif // PRODUCT 2747 // Special LP64 flags, product only needed for now. 2748 #ifdef _LP64 2749 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 2750 #else 2751 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 2752 #endif // _LP64 2753 2754 // Implementation macros 2755 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 2756 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 2757 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 2758 #define MATERIALIZE_PD_DIAGNOSTIC_FLAG(type, name, doc) type name = pd_##name; 2759 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 2760 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 2761 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 2762 #ifdef PRODUCT 2763 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 2764 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 2765 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 2766 #else 2767 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 2768 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 2769 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 2770 #endif // PRODUCT 2771 #ifdef _LP64 2772 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 2773 #else 2774 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 2775 #endif // _LP64 2776 2777 // Only materialize src code for range checking when required, ignore otherwise 2778 #define IGNORE_RANGE(a, b) 2779 // Only materialize src code for contraint checking when required, ignore otherwise 2780 #define IGNORE_CONSTRAINT(func,type) 2781 2782 #define IGNORE_WRITEABLE(type) 2783 2784 VM_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2785 DECLARE_PD_DEVELOPER_FLAG, \ 2786 DECLARE_PRODUCT_FLAG, \ 2787 DECLARE_PD_PRODUCT_FLAG, \ 2788 DECLARE_DIAGNOSTIC_FLAG, \ 2789 DECLARE_PD_DIAGNOSTIC_FLAG, \ 2790 DECLARE_EXPERIMENTAL_FLAG, \ 2791 DECLARE_NOTPRODUCT_FLAG, \ 2792 DECLARE_MANAGEABLE_FLAG, \ 2793 DECLARE_PRODUCT_RW_FLAG, \ 2794 DECLARE_LP64_PRODUCT_FLAG, \ 2795 IGNORE_RANGE, \ 2796 IGNORE_CONSTRAINT, \ 2797 IGNORE_WRITEABLE) 2798 2799 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2800 DECLARE_PD_DEVELOPER_FLAG, \ 2801 DECLARE_PRODUCT_FLAG, \ 2802 DECLARE_PD_PRODUCT_FLAG, \ 2803 DECLARE_DIAGNOSTIC_FLAG, \ 2804 DECLARE_PD_DIAGNOSTIC_FLAG, \ 2805 DECLARE_NOTPRODUCT_FLAG, \ 2806 IGNORE_RANGE, \ 2807 IGNORE_CONSTRAINT, \ 2808 IGNORE_WRITEABLE) 2809 2810 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 2811 DECLARE_PRODUCT_FLAG, \ 2812 DECLARE_DIAGNOSTIC_FLAG, \ 2813 DECLARE_EXPERIMENTAL_FLAG, \ 2814 DECLARE_NOTPRODUCT_FLAG, \ 2815 IGNORE_RANGE, \ 2816 IGNORE_CONSTRAINT, \ 2817 IGNORE_WRITEABLE) 2818 2819 // Extensions 2820 2821 #include "runtime/globals_ext.hpp" 2822 2823 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP