| 1 | /* |
|---|---|
| 2 | * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 | * or visit www.oracle.com if you need additional information or have any |
| 21 | * questions. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #ifndef SHARE_RUNTIME_GLOBALS_HPP |
| 26 | #define SHARE_RUNTIME_GLOBALS_HPP |
| 27 | |
| 28 | #include "compiler/compiler_globals.hpp" |
| 29 | #include "gc/shared/gc_globals.hpp" |
| 30 | #include "runtime/globals_shared.hpp" |
| 31 | #include "utilities/align.hpp" |
| 32 | #include "utilities/globalDefinitions.hpp" |
| 33 | #include "utilities/macros.hpp" |
| 34 | #include CPU_HEADER(globals) |
| 35 | #include OS_HEADER(globals) |
| 36 | #include OS_CPU_HEADER(globals) |
| 37 | |
| 38 | // develop flags are settable / visible only during development and are constant in the PRODUCT version |
| 39 | // product flags are always settable / visible |
| 40 | // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version |
| 41 | |
| 42 | // A flag must be declared with one of the following types: |
| 43 | // bool, int, uint, intx, uintx, size_t, ccstr, ccstrlist, double, or uint64_t. |
| 44 | // The type "ccstr" and "ccstrlist" are an alias for "const char*" and is used |
| 45 | // only in this file, because the macrology requires single-token type names. |
| 46 | |
| 47 | // Note: Diagnostic options not meant for VM tuning or for product modes. |
| 48 | // They are to be used for VM quality assurance or field diagnosis |
| 49 | // of VM bugs. They are hidden so that users will not be encouraged to |
| 50 | // try them as if they were VM ordinary execution options. However, they |
| 51 | // are available in the product version of the VM. Under instruction |
| 52 | // from support engineers, VM customers can turn them on to collect |
| 53 | // diagnostic information about VM problems. To use a VM diagnostic |
| 54 | // option, you must first specify +UnlockDiagnosticVMOptions. |
| 55 | // (This master switch also affects the behavior of -Xprintflags.) |
| 56 | // |
| 57 | // experimental flags are in support of features that are not |
| 58 | // part of the officially supported product, but are available |
| 59 | // for experimenting with. They could, for example, be performance |
| 60 | // features that may not have undergone full or rigorous QA, but which may |
| 61 | // help performance in some cases and released for experimentation |
| 62 | // by the community of users and developers. This flag also allows one to |
| 63 | // be able to build a fully supported product that nonetheless also |
| 64 | // ships with some unsupported, lightly tested, experimental features. |
| 65 | // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding |
| 66 | // UnlockExperimentalVMOptions flag, which allows the control and |
| 67 | // modification of the experimental flags. |
| 68 | // |
| 69 | // Nota bene: neither diagnostic nor experimental options should be used casually, |
| 70 | // and they are not supported on production loads, except under explicit |
| 71 | // direction from support engineers. |
| 72 | // |
| 73 | // manageable flags are writeable external product flags. |
| 74 | // They are dynamically writeable through the JDK management interface |
| 75 | // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. |
| 76 | // These flags are external exported interface (see CCC). The list of |
| 77 | // manageable flags can be queried programmatically through the management |
| 78 | // interface. |
| 79 | // |
| 80 | // A flag can be made as "manageable" only if |
| 81 | // - the flag is defined in a CCC as an external exported interface. |
| 82 | // - the VM implementation supports dynamic setting of the flag. |
| 83 | // This implies that the VM must *always* query the flag variable |
| 84 | // and not reuse state related to the flag state at any given time. |
| 85 | // - you want the flag to be queried programmatically by the customers. |
| 86 | // |
| 87 | // product_rw flags are writeable internal product flags. |
| 88 | // They are like "manageable" flags but for internal/private use. |
| 89 | // The list of product_rw flags are internal/private flags which |
| 90 | // may be changed/removed in a future release. It can be set |
| 91 | // through the management interface to get/set value |
| 92 | // when the name of flag is supplied. |
| 93 | // |
| 94 | // A flag can be made as "product_rw" only if |
| 95 | // - the VM implementation supports dynamic setting of the flag. |
| 96 | // This implies that the VM must *always* query the flag variable |
| 97 | // and not reuse state related to the flag state at any given time. |
| 98 | // |
| 99 | // Note that when there is a need to support develop flags to be writeable, |
| 100 | // it can be done in the same way as product_rw. |
| 101 | // |
| 102 | // range is a macro that will expand to min and max arguments for range |
| 103 | // checking code if provided - see jvmFlagRangeList.hpp |
| 104 | // |
| 105 | // constraint is a macro that will expand to custom function call |
| 106 | // for constraint checking if provided - see jvmFlagConstraintList.hpp |
| 107 | // |
| 108 | // writeable is a macro that controls if and how the value can change during the runtime |
| 109 | // |
| 110 | // writeable(Always) is optional and allows the flag to have its value changed |
| 111 | // without any limitations at any time |
| 112 | // |
| 113 | // writeable(Once) flag value's can be only set once during the lifetime of VM |
| 114 | // |
| 115 | // writeable(CommandLineOnly) flag value's can be only set from command line |
| 116 | // (multiple times allowed) |
| 117 | // |
| 118 | |
| 119 | // Default and minimum StringTable and SymbolTable size values |
| 120 | // Must be powers of 2 |
| 121 | const size_t defaultStringTableSize = NOT_LP64(1024) LP64_ONLY(65536); |
| 122 | const size_t minimumStringTableSize = 128; |
| 123 | const size_t defaultSymbolTableSize = 32768; // 2^15 |
| 124 | const size_t minimumSymbolTableSize = 1024; |
| 125 | |
| 126 | #define RUNTIME_FLAGS(develop, \ |
| 127 | develop_pd, \ |
| 128 | product, \ |
| 129 | product_pd, \ |
| 130 | diagnostic, \ |
| 131 | diagnostic_pd, \ |
| 132 | experimental, \ |
| 133 | notproduct, \ |
| 134 | manageable, \ |
| 135 | product_rw, \ |
| 136 | lp64_product, \ |
| 137 | range, \ |
| 138 | constraint, \ |
| 139 | writeable) \ |
| 140 | \ |
| 141 | lp64_product(bool, UseCompressedOops, false, \ |
| 142 | "Use 32-bit object references in 64-bit VM. " \ |
| 143 | "lp64_product means flag is always constant in 32 bit VM") \ |
| 144 | \ |
| 145 | lp64_product(bool, UseCompressedClassPointers, false, \ |
| 146 | "Use 32-bit class pointers in 64-bit VM. " \ |
| 147 | "lp64_product means flag is always constant in 32 bit VM") \ |
| 148 | \ |
| 149 | notproduct(bool, CheckCompressedOops, true, \ |
| 150 | "Generate checks in encoding/decoding code in debug VM") \ |
| 151 | \ |
| 152 | product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ |
| 153 | "Heap allocation steps through preferred address regions to find" \ |
| 154 | " where it can allocate the heap. Number of steps to take per " \ |
| 155 | "region.") \ |
| 156 | range(1, max_uintx) \ |
| 157 | \ |
| 158 | lp64_product(intx, ObjectAlignmentInBytes, 8, \ |
| 159 | "Default object alignment in bytes, 8 is minimum") \ |
| 160 | range(8, 256) \ |
| 161 | constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ |
| 162 | \ |
| 163 | develop(bool, CleanChunkPoolAsync, true, \ |
| 164 | "Clean the chunk pool asynchronously") \ |
| 165 | \ |
| 166 | product_pd(bool, ThreadLocalHandshakes, \ |
| 167 | "Use thread-local polls instead of global poll for safepoints.") \ |
| 168 | constraint(ThreadLocalHandshakesConstraintFunc,AfterErgo) \ |
| 169 | \ |
| 170 | diagnostic(uint, HandshakeTimeout, 0, \ |
| 171 | "If nonzero set a timeout in milliseconds for handshakes") \ |
| 172 | \ |
| 173 | experimental(bool, AlwaysSafeConstructors, false, \ |
| 174 | "Force safe construction, as if all fields are final.") \ |
| 175 | \ |
| 176 | diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ |
| 177 | "Enable normal processing of flags relating to field diagnostics")\ |
| 178 | \ |
| 179 | experimental(bool, UnlockExperimentalVMOptions, false, \ |
| 180 | "Enable normal processing of flags relating to experimental " \ |
| 181 | "features") \ |
| 182 | \ |
| 183 | product(bool, JavaMonitorsInStackTrace, true, \ |
| 184 | "Print information about Java monitor locks when the stacks are" \ |
| 185 | "dumped") \ |
| 186 | \ |
| 187 | product_pd(bool, UseLargePages, \ |
| 188 | "Use large page memory") \ |
| 189 | \ |
| 190 | product_pd(bool, UseLargePagesIndividualAllocation, \ |
| 191 | "Allocate large pages individually for better affinity") \ |
| 192 | \ |
| 193 | develop(bool, LargePagesIndividualAllocationInjectError, false, \ |
| 194 | "Fail large pages individual allocation") \ |
| 195 | \ |
| 196 | product(bool, UseLargePagesInMetaspace, false, \ |
| 197 | "Use large page memory in metaspace. " \ |
| 198 | "Only used if UseLargePages is enabled.") \ |
| 199 | \ |
| 200 | product(bool, UseNUMA, false, \ |
| 201 | "Use NUMA if available") \ |
| 202 | \ |
| 203 | product(bool, UseNUMAInterleaving, false, \ |
| 204 | "Interleave memory across NUMA nodes if available") \ |
| 205 | \ |
| 206 | product(size_t, NUMAInterleaveGranularity, 2*M, \ |
| 207 | "Granularity to use for NUMA interleaving on Windows OS") \ |
| 208 | range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \ |
| 209 | \ |
| 210 | product(bool, ForceNUMA, false, \ |
| 211 | "Force NUMA optimizations on single-node/UMA systems") \ |
| 212 | \ |
| 213 | product(uintx, NUMAChunkResizeWeight, 20, \ |
| 214 | "Percentage (0-100) used to weight the current sample when " \ |
| 215 | "computing exponentially decaying average for " \ |
| 216 | "AdaptiveNUMAChunkSizing") \ |
| 217 | range(0, 100) \ |
| 218 | \ |
| 219 | product(size_t, NUMASpaceResizeRate, 1*G, \ |
| 220 | "Do not reallocate more than this amount per collection") \ |
| 221 | range(0, max_uintx) \ |
| 222 | \ |
| 223 | product(bool, UseAdaptiveNUMAChunkSizing, true, \ |
| 224 | "Enable adaptive chunk sizing for NUMA") \ |
| 225 | \ |
| 226 | product(bool, NUMAStats, false, \ |
| 227 | "Print NUMA stats in detailed heap information") \ |
| 228 | \ |
| 229 | product(uintx, NUMAPageScanRate, 256, \ |
| 230 | "Maximum number of pages to include in the page scan procedure") \ |
| 231 | range(0, max_uintx) \ |
| 232 | \ |
| 233 | product(intx, UseSSE, 99, \ |
| 234 | "Highest supported SSE instructions set on x86/x64") \ |
| 235 | range(0, 99) \ |
| 236 | \ |
| 237 | product(bool, UseAES, false, \ |
| 238 | "Control whether AES instructions are used when available") \ |
| 239 | \ |
| 240 | product(bool, UseFMA, false, \ |
| 241 | "Control whether FMA instructions are used when available") \ |
| 242 | \ |
| 243 | product(bool, UseSHA, false, \ |
| 244 | "Control whether SHA instructions are used when available") \ |
| 245 | \ |
| 246 | diagnostic(bool, UseGHASHIntrinsics, false, \ |
| 247 | "Use intrinsics for GHASH versions of crypto") \ |
| 248 | \ |
| 249 | product(bool, UseBASE64Intrinsics, false, \ |
| 250 | "Use intrinsics for java.util.Base64") \ |
| 251 | \ |
| 252 | product(size_t, LargePageSizeInBytes, 0, \ |
| 253 | "Large page size (0 to let VM choose the page size)") \ |
| 254 | range(0, max_uintx) \ |
| 255 | \ |
| 256 | product(size_t, LargePageHeapSizeThreshold, 128*M, \ |
| 257 | "Use large pages if maximum heap is at least this big") \ |
| 258 | range(0, max_uintx) \ |
| 259 | \ |
| 260 | product(bool, ForceTimeHighResolution, false, \ |
| 261 | "Using high time resolution (for Win32 only)") \ |
| 262 | \ |
| 263 | develop(bool, TracePcPatching, false, \ |
| 264 | "Trace usage of frame::patch_pc") \ |
| 265 | \ |
| 266 | develop(bool, TraceRelocator, false, \ |
| 267 | "Trace the bytecode relocator") \ |
| 268 | \ |
| 269 | develop(bool, TraceLongCompiles, false, \ |
| 270 | "Print out every time compilation is longer than " \ |
| 271 | "a given threshold") \ |
| 272 | \ |
| 273 | diagnostic(bool, SafepointALot, false, \ |
| 274 | "Generate a lot of safepoints. This works with " \ |
| 275 | "GuaranteedSafepointInterval") \ |
| 276 | \ |
| 277 | diagnostic(bool, HandshakeALot, false, \ |
| 278 | "Generate a lot of handshakes. This works with " \ |
| 279 | "GuaranteedSafepointInterval") \ |
| 280 | \ |
| 281 | product_pd(bool, BackgroundCompilation, \ |
| 282 | "A thread requesting compilation is not blocked during " \ |
| 283 | "compilation") \ |
| 284 | \ |
| 285 | product(bool, PrintVMQWaitTime, false, \ |
| 286 | "Print out the waiting time in VM operation queue") \ |
| 287 | \ |
| 288 | product(bool, MethodFlushing, true, \ |
| 289 | "Reclamation of zombie and not-entrant methods") \ |
| 290 | \ |
| 291 | develop(bool, VerifyStack, false, \ |
| 292 | "Verify stack of each thread when it is entering a runtime call") \ |
| 293 | \ |
| 294 | diagnostic(bool, ForceUnreachable, false, \ |
| 295 | "Make all non code cache addresses to be unreachable by " \ |
| 296 | "forcing use of 64bit literal fixups") \ |
| 297 | \ |
| 298 | notproduct(bool, StressDerivedPointers, false, \ |
| 299 | "Force scavenge when a derived pointer is detected on stack " \ |
| 300 | "after rtm call") \ |
| 301 | \ |
| 302 | develop(bool, TraceDerivedPointers, false, \ |
| 303 | "Trace traversal of derived pointers on stack") \ |
| 304 | \ |
| 305 | notproduct(bool, TraceCodeBlobStacks, false, \ |
| 306 | "Trace stack-walk of codeblobs") \ |
| 307 | \ |
| 308 | product(bool, PrintJNIResolving, false, \ |
| 309 | "Used to implement -v:jni") \ |
| 310 | \ |
| 311 | notproduct(bool, PrintRewrites, false, \ |
| 312 | "Print methods that are being rewritten") \ |
| 313 | \ |
| 314 | product(bool, UseInlineCaches, true, \ |
| 315 | "Use Inline Caches for virtual calls ") \ |
| 316 | \ |
| 317 | diagnostic(bool, InlineArrayCopy, true, \ |
| 318 | "Inline arraycopy native that is known to be part of " \ |
| 319 | "base library DLL") \ |
| 320 | \ |
| 321 | diagnostic(bool, InlineObjectHash, true, \ |
| 322 | "Inline Object::hashCode() native that is known to be part " \ |
| 323 | "of base library DLL") \ |
| 324 | \ |
| 325 | diagnostic(bool, InlineNatives, true, \ |
| 326 | "Inline natives that are known to be part of base library DLL") \ |
| 327 | \ |
| 328 | diagnostic(bool, InlineMathNatives, true, \ |
| 329 | "Inline SinD, CosD, etc.") \ |
| 330 | \ |
| 331 | diagnostic(bool, InlineClassNatives, true, \ |
| 332 | "Inline Class.isInstance, etc") \ |
| 333 | \ |
| 334 | diagnostic(bool, InlineThreadNatives, true, \ |
| 335 | "Inline Thread.currentThread, etc") \ |
| 336 | \ |
| 337 | diagnostic(bool, InlineUnsafeOps, true, \ |
| 338 | "Inline memory ops (native methods) from Unsafe") \ |
| 339 | \ |
| 340 | product(bool, CriticalJNINatives, true, \ |
| 341 | "Check for critical JNI entry points") \ |
| 342 | \ |
| 343 | notproduct(bool, StressCriticalJNINatives, false, \ |
| 344 | "Exercise register saving code in critical natives") \ |
| 345 | \ |
| 346 | diagnostic(bool, UseAESIntrinsics, false, \ |
| 347 | "Use intrinsics for AES versions of crypto") \ |
| 348 | \ |
| 349 | diagnostic(bool, UseAESCTRIntrinsics, false, \ |
| 350 | "Use intrinsics for the paralleled version of AES/CTR crypto") \ |
| 351 | \ |
| 352 | diagnostic(bool, UseSHA1Intrinsics, false, \ |
| 353 | "Use intrinsics for SHA-1 crypto hash function. " \ |
| 354 | "Requires that UseSHA is enabled.") \ |
| 355 | \ |
| 356 | diagnostic(bool, UseSHA256Intrinsics, false, \ |
| 357 | "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ |
| 358 | "Requires that UseSHA is enabled.") \ |
| 359 | \ |
| 360 | diagnostic(bool, UseSHA512Intrinsics, false, \ |
| 361 | "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ |
| 362 | "Requires that UseSHA is enabled.") \ |
| 363 | \ |
| 364 | diagnostic(bool, UseCRC32Intrinsics, false, \ |
| 365 | "use intrinsics for java.util.zip.CRC32") \ |
| 366 | \ |
| 367 | diagnostic(bool, UseCRC32CIntrinsics, false, \ |
| 368 | "use intrinsics for java.util.zip.CRC32C") \ |
| 369 | \ |
| 370 | diagnostic(bool, UseAdler32Intrinsics, false, \ |
| 371 | "use intrinsics for java.util.zip.Adler32") \ |
| 372 | \ |
| 373 | diagnostic(bool, UseVectorizedMismatchIntrinsic, false, \ |
| 374 | "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ |
| 375 | \ |
| 376 | diagnostic(ccstrlist, DisableIntrinsic, "", \ |
| 377 | "do not expand intrinsics whose (internal) names appear here") \ |
| 378 | \ |
| 379 | develop(bool, TraceCallFixup, false, \ |
| 380 | "Trace all call fixups") \ |
| 381 | \ |
| 382 | develop(bool, DeoptimizeALot, false, \ |
| 383 | "Deoptimize at every exit from the runtime system") \ |
| 384 | \ |
| 385 | notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ |
| 386 | "A comma separated list of bcis to deoptimize at") \ |
| 387 | \ |
| 388 | product(bool, DeoptimizeRandom, false, \ |
| 389 | "Deoptimize random frames on random exit from the runtime system")\ |
| 390 | \ |
| 391 | notproduct(bool, ZombieALot, false, \ |
| 392 | "Create zombies (non-entrant) at exit from the runtime system") \ |
| 393 | \ |
| 394 | notproduct(bool, WalkStackALot, false, \ |
| 395 | "Trace stack (no print) at every exit from the runtime system") \ |
| 396 | \ |
| 397 | product(bool, Debugging, false, \ |
| 398 | "Set when executing debug methods in debug.cpp " \ |
| 399 | "(to prevent triggering assertions)") \ |
| 400 | \ |
| 401 | notproduct(bool, StrictSafepointChecks, trueInDebug, \ |
| 402 | "Enable strict checks that safepoints cannot happen for threads " \ |
| 403 | "that use NoSafepointVerifier") \ |
| 404 | \ |
| 405 | notproduct(bool, VerifyLastFrame, false, \ |
| 406 | "Verify oops on last frame on entry to VM") \ |
| 407 | \ |
| 408 | product(bool, FailOverToOldVerifier, true, \ |
| 409 | "Fail over to old verifier when split verifier fails") \ |
| 410 | \ |
| 411 | product(bool, SafepointTimeout, false, \ |
| 412 | "Time out and warn or fail after SafepointTimeoutDelay " \ |
| 413 | "milliseconds if failed to reach safepoint") \ |
| 414 | \ |
| 415 | diagnostic(bool, AbortVMOnSafepointTimeout, false, \ |
| 416 | "Abort upon failure to reach safepoint (see SafepointTimeout)") \ |
| 417 | \ |
| 418 | diagnostic(bool, AbortVMOnVMOperationTimeout, false, \ |
| 419 | "Abort upon failure to complete VM operation promptly") \ |
| 420 | \ |
| 421 | diagnostic(intx, AbortVMOnVMOperationTimeoutDelay, 1000, \ |
| 422 | "Delay in milliseconds for option AbortVMOnVMOperationTimeout") \ |
| 423 | range(0, max_intx) \ |
| 424 | \ |
| 425 | /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ |
| 426 | /* typically, at most a few retries are needed */ \ |
| 427 | product(intx, SuspendRetryCount, 50, \ |
| 428 | "Maximum retry count for an external suspend request") \ |
| 429 | range(0, max_intx) \ |
| 430 | \ |
| 431 | product(intx, SuspendRetryDelay, 5, \ |
| 432 | "Milliseconds to delay per retry (* current_retry_count)") \ |
| 433 | range(0, max_intx) \ |
| 434 | \ |
| 435 | product(bool, AssertOnSuspendWaitFailure, false, \ |
| 436 | "Assert/Guarantee on external suspend wait failure") \ |
| 437 | \ |
| 438 | product(bool, TraceSuspendWaitFailures, false, \ |
| 439 | "Trace external suspend wait failures") \ |
| 440 | \ |
| 441 | product(bool, MaxFDLimit, true, \ |
| 442 | "Bump the number of file descriptors to maximum in Solaris") \ |
| 443 | \ |
| 444 | diagnostic(bool, LogEvents, true, \ |
| 445 | "Enable the various ring buffer event logs") \ |
| 446 | \ |
| 447 | diagnostic(uintx, LogEventsBufferEntries, 20, \ |
| 448 | "Number of ring buffer event logs") \ |
| 449 | range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ |
| 450 | \ |
| 451 | diagnostic(bool, BytecodeVerificationRemote, true, \ |
| 452 | "Enable the Java bytecode verifier for remote classes") \ |
| 453 | \ |
| 454 | diagnostic(bool, BytecodeVerificationLocal, false, \ |
| 455 | "Enable the Java bytecode verifier for local classes") \ |
| 456 | \ |
| 457 | develop(bool, ForceFloatExceptions, trueInDebug, \ |
| 458 | "Force exceptions on FP stack under/overflow") \ |
| 459 | \ |
| 460 | develop(bool, VerifyStackAtCalls, false, \ |
| 461 | "Verify that the stack pointer is unchanged after calls") \ |
| 462 | \ |
| 463 | develop(bool, TraceJavaAssertions, false, \ |
| 464 | "Trace java language assertions") \ |
| 465 | \ |
| 466 | notproduct(bool, VerifyCodeCache, false, \ |
| 467 | "Verify code cache on memory allocation/deallocation") \ |
| 468 | \ |
| 469 | develop(bool, UseMallocOnly, false, \ |
| 470 | "Use only malloc/free for allocation (no resource area/arena)") \ |
| 471 | \ |
| 472 | develop(bool, PrintMallocStatistics, false, \ |
| 473 | "Print malloc/free statistics") \ |
| 474 | \ |
| 475 | develop(bool, ZapResourceArea, trueInDebug, \ |
| 476 | "Zap freed resource/arena space with 0xABABABAB") \ |
| 477 | \ |
| 478 | notproduct(bool, ZapVMHandleArea, trueInDebug, \ |
| 479 | "Zap freed VM handle space with 0xBCBCBCBC") \ |
| 480 | \ |
| 481 | notproduct(bool, ZapStackSegments, trueInDebug, \ |
| 482 | "Zap allocated/freed stack segments with 0xFADFADED") \ |
| 483 | \ |
| 484 | develop(bool, ZapUnusedHeapArea, trueInDebug, \ |
| 485 | "Zap unused heap space with 0xBAADBABE") \ |
| 486 | \ |
| 487 | develop(bool, CheckZapUnusedHeapArea, false, \ |
| 488 | "Check zapping of unused heap space") \ |
| 489 | \ |
| 490 | develop(bool, ZapFillerObjects, trueInDebug, \ |
| 491 | "Zap filler objects with 0xDEAFBABE") \ |
| 492 | \ |
| 493 | develop(bool, PrintVMMessages, true, \ |
| 494 | "Print VM messages on console") \ |
| 495 | \ |
| 496 | notproduct(uintx, ErrorHandlerTest, 0, \ |
| 497 | "If > 0, provokes an error after VM initialization; the value " \ |
| 498 | "determines which error to provoke. See test_error_handler() " \ |
| 499 | "in vmError.cpp.") \ |
| 500 | \ |
| 501 | notproduct(uintx, TestCrashInErrorHandler, 0, \ |
| 502 | "If > 0, provokes an error inside VM error handler (a secondary " \ |
| 503 | "crash). see test_error_handler() in vmError.cpp") \ |
| 504 | \ |
| 505 | notproduct(bool, TestSafeFetchInErrorHandler, false, \ |
| 506 | "If true, tests SafeFetch inside error handler.") \ |
| 507 | \ |
| 508 | notproduct(bool, TestUnresponsiveErrorHandler, false, \ |
| 509 | "If true, simulates an unresponsive error handler.") \ |
| 510 | \ |
| 511 | develop(bool, Verbose, false, \ |
| 512 | "Print additional debugging information from other modes") \ |
| 513 | \ |
| 514 | develop(bool, PrintMiscellaneous, false, \ |
| 515 | "Print uncategorized debugging information (requires +Verbose)") \ |
| 516 | \ |
| 517 | develop(bool, WizardMode, false, \ |
| 518 | "Print much more debugging information") \ |
| 519 | \ |
| 520 | product(bool, ShowMessageBoxOnError, false, \ |
| 521 | "Keep process alive on VM fatal error") \ |
| 522 | \ |
| 523 | product(bool, CreateCoredumpOnCrash, true, \ |
| 524 | "Create core/mini dump on VM fatal error") \ |
| 525 | \ |
| 526 | product(uint64_t, ErrorLogTimeout, 2 * 60, \ |
| 527 | "Timeout, in seconds, to limit the time spent on writing an " \ |
| 528 | "error log in case of a crash.") \ |
| 529 | range(0, (uint64_t)max_jlong/1000) \ |
| 530 | \ |
| 531 | product_pd(bool, UseOSErrorReporting, \ |
| 532 | "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ |
| 533 | \ |
| 534 | product(bool, SuppressFatalErrorMessage, false, \ |
| 535 | "Report NO fatal error message (avoid deadlock)") \ |
| 536 | \ |
| 537 | product(ccstrlist, OnError, "", \ |
| 538 | "Run user-defined commands on fatal error; see VMError.cpp " \ |
| 539 | "for examples") \ |
| 540 | \ |
| 541 | product(ccstrlist, OnOutOfMemoryError, "", \ |
| 542 | "Run user-defined commands on first java.lang.OutOfMemoryError") \ |
| 543 | \ |
| 544 | manageable(bool, HeapDumpBeforeFullGC, false, \ |
| 545 | "Dump heap to file before any major stop-the-world GC") \ |
| 546 | \ |
| 547 | manageable(bool, HeapDumpAfterFullGC, false, \ |
| 548 | "Dump heap to file after any major stop-the-world GC") \ |
| 549 | \ |
| 550 | manageable(bool, HeapDumpOnOutOfMemoryError, false, \ |
| 551 | "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ |
| 552 | \ |
| 553 | manageable(ccstr, HeapDumpPath, NULL, \ |
| 554 | "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ |
| 555 | "directory) of the dump file (defaults to java_pid<pid>.hprof " \ |
| 556 | "in the working directory)") \ |
| 557 | \ |
| 558 | develop(bool, BreakAtWarning, false, \ |
| 559 | "Execute breakpoint upon encountering VM warning") \ |
| 560 | \ |
| 561 | product(ccstr, NativeMemoryTracking, "off", \ |
| 562 | "Native memory tracking options") \ |
| 563 | \ |
| 564 | diagnostic(bool, PrintNMTStatistics, false, \ |
| 565 | "Print native memory tracking summary data if it is on") \ |
| 566 | \ |
| 567 | diagnostic(bool, LogCompilation, false, \ |
| 568 | "Log compilation activity in detail to LogFile") \ |
| 569 | \ |
| 570 | product(bool, PrintCompilation, false, \ |
| 571 | "Print compilations") \ |
| 572 | \ |
| 573 | product(bool, PrintExtendedThreadInfo, false, \ |
| 574 | "Print more information in thread dump") \ |
| 575 | \ |
| 576 | diagnostic(bool, TraceNMethodInstalls, false, \ |
| 577 | "Trace nmethod installation") \ |
| 578 | \ |
| 579 | diagnostic(intx, ScavengeRootsInCode, 2, \ |
| 580 | "0: do not allow scavengable oops in the code cache; " \ |
| 581 | "1: allow scavenging from the code cache; " \ |
| 582 | "2: emit as many constants as the compiler can see") \ |
| 583 | range(0, 2) \ |
| 584 | \ |
| 585 | product(bool, AlwaysRestoreFPU, false, \ |
| 586 | "Restore the FPU control word after every JNI call (expensive)") \ |
| 587 | \ |
| 588 | diagnostic(bool, PrintCompilation2, false, \ |
| 589 | "Print additional statistics per compilation") \ |
| 590 | \ |
| 591 | diagnostic(bool, PrintAdapterHandlers, false, \ |
| 592 | "Print code generated for i2c/c2i adapters") \ |
| 593 | \ |
| 594 | diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ |
| 595 | "Verify that i2c/c2i adapters are called properly") \ |
| 596 | \ |
| 597 | develop(bool, VerifyAdapterSharing, false, \ |
| 598 | "Verify that the code for shared adapters is the equivalent") \ |
| 599 | \ |
| 600 | diagnostic(bool, PrintAssembly, false, \ |
| 601 | "Print assembly code (using external disassembler.so)") \ |
| 602 | \ |
| 603 | diagnostic(ccstr, PrintAssemblyOptions, NULL, \ |
| 604 | "Print options string passed to disassembler.so") \ |
| 605 | \ |
| 606 | notproduct(bool, PrintNMethodStatistics, false, \ |
| 607 | "Print a summary statistic for the generated nmethods") \ |
| 608 | \ |
| 609 | diagnostic(bool, PrintNMethods, false, \ |
| 610 | "Print assembly code for nmethods when generated") \ |
| 611 | \ |
| 612 | diagnostic(bool, PrintNativeNMethods, false, \ |
| 613 | "Print assembly code for native nmethods when generated") \ |
| 614 | \ |
| 615 | develop(bool, PrintDebugInfo, false, \ |
| 616 | "Print debug information for all nmethods when generated") \ |
| 617 | \ |
| 618 | develop(bool, PrintRelocations, false, \ |
| 619 | "Print relocation information for all nmethods when generated") \ |
| 620 | \ |
| 621 | develop(bool, PrintDependencies, false, \ |
| 622 | "Print dependency information for all nmethods when generated") \ |
| 623 | \ |
| 624 | develop(bool, PrintExceptionHandlers, false, \ |
| 625 | "Print exception handler tables for all nmethods when generated") \ |
| 626 | \ |
| 627 | develop(bool, StressCompiledExceptionHandlers, false, \ |
| 628 | "Exercise compiled exception handlers") \ |
| 629 | \ |
| 630 | develop(bool, InterceptOSException, false, \ |
| 631 | "Start debugger when an implicit OS (e.g. NULL) " \ |
| 632 | "exception happens") \ |
| 633 | \ |
| 634 | product(bool, PrintCodeCache, false, \ |
| 635 | "Print the code cache memory usage when exiting") \ |
| 636 | \ |
| 637 | develop(bool, PrintCodeCache2, false, \ |
| 638 | "Print detailed usage information on the code cache when exiting")\ |
| 639 | \ |
| 640 | product(bool, PrintCodeCacheOnCompilation, false, \ |
| 641 | "Print the code cache memory usage each time a method is " \ |
| 642 | "compiled") \ |
| 643 | \ |
| 644 | diagnostic(bool, PrintCodeHeapAnalytics, false, \ |
| 645 | "Print code heap usage statistics on exit and on full condition") \ |
| 646 | \ |
| 647 | diagnostic(bool, PrintStubCode, false, \ |
| 648 | "Print generated stub code") \ |
| 649 | \ |
| 650 | product(bool, StackTraceInThrowable, true, \ |
| 651 | "Collect backtrace in throwable when exception happens") \ |
| 652 | \ |
| 653 | product(bool, OmitStackTraceInFastThrow, true, \ |
| 654 | "Omit backtraces for some 'hot' exceptions in optimized code") \ |
| 655 | \ |
| 656 | product(bool, PrintWarnings, true, \ |
| 657 | "Print JVM warnings to output stream") \ |
| 658 | \ |
| 659 | notproduct(uintx, WarnOnStalledSpinLock, 0, \ |
| 660 | "Print warnings for stalled SpinLocks") \ |
| 661 | \ |
| 662 | product(bool, RegisterFinalizersAtInit, true, \ |
| 663 | "Register finalizable objects at end of Object.<init> or " \ |
| 664 | "after allocation") \ |
| 665 | \ |
| 666 | develop(bool, RegisterReferences, true, \ |
| 667 | "Tell whether the VM should register soft/weak/final/phantom " \ |
| 668 | "references") \ |
| 669 | \ |
| 670 | develop(bool, IgnoreRewrites, false, \ |
| 671 | "Suppress rewrites of bytecodes in the oopmap generator. " \ |
| 672 | "This is unsafe!") \ |
| 673 | \ |
| 674 | develop(bool, PrintCodeCacheExtension, false, \ |
| 675 | "Print extension of code cache") \ |
| 676 | \ |
| 677 | develop(bool, UsePrivilegedStack, true, \ |
| 678 | "Enable the security JVM functions") \ |
| 679 | \ |
| 680 | develop(bool, ProtectionDomainVerification, true, \ |
| 681 | "Verify protection domain before resolution in system dictionary")\ |
| 682 | \ |
| 683 | product(bool, ClassUnloading, true, \ |
| 684 | "Do unloading of classes") \ |
| 685 | \ |
| 686 | product(bool, ClassUnloadingWithConcurrentMark, true, \ |
| 687 | "Do unloading of classes with a concurrent marking cycle") \ |
| 688 | \ |
| 689 | develop(bool, DisableStartThread, false, \ |
| 690 | "Disable starting of additional Java threads " \ |
| 691 | "(for debugging only)") \ |
| 692 | \ |
| 693 | develop(bool, MemProfiling, false, \ |
| 694 | "Write memory usage profiling to log file") \ |
| 695 | \ |
| 696 | notproduct(bool, PrintSystemDictionaryAtExit, false, \ |
| 697 | "Print the system dictionary at exit") \ |
| 698 | \ |
| 699 | diagnostic(bool, DynamicallyResizeSystemDictionaries, true, \ |
| 700 | "Dynamically resize system dictionaries as needed") \ |
| 701 | \ |
| 702 | product(bool, AlwaysLockClassLoader, false, \ |
| 703 | "Require the VM to acquire the class loader lock before calling " \ |
| 704 | "loadClass() even for class loaders registering " \ |
| 705 | "as parallel capable") \ |
| 706 | \ |
| 707 | product(bool, AllowParallelDefineClass, false, \ |
| 708 | "Allow parallel defineClass requests for class loaders " \ |
| 709 | "registering as parallel capable") \ |
| 710 | \ |
| 711 | product_pd(bool, DontYieldALot, \ |
| 712 | "Throw away obvious excess yield calls") \ |
| 713 | \ |
| 714 | develop(bool, UseDetachedThreads, true, \ |
| 715 | "Use detached threads that are recycled upon termination " \ |
| 716 | "(for Solaris only)") \ |
| 717 | \ |
| 718 | experimental(bool, DisablePrimordialThreadGuardPages, false, \ |
| 719 | "Disable the use of stack guard pages if the JVM is loaded " \ |
| 720 | "on the primordial process thread") \ |
| 721 | \ |
| 722 | product(bool, UseLWPSynchronization, true, \ |
| 723 | "Use LWP-based instead of libthread-based synchronization " \ |
| 724 | "(SPARC only)") \ |
| 725 | \ |
| 726 | product(intx, MonitorBound, 0, "Bound Monitor population") \ |
| 727 | range(0, max_jint) \ |
| 728 | \ |
| 729 | experimental(intx, MonitorUsedDeflationThreshold, 90, \ |
| 730 | "Percentage of used monitors before triggering cleanup " \ |
| 731 | "safepoint which deflates monitors (0 is off). " \ |
| 732 | "The check is performed on GuaranteedSafepointInterval.") \ |
| 733 | range(0, 100) \ |
| 734 | \ |
| 735 | experimental(intx, hashCode, 5, \ |
| 736 | "(Unstable) select hashCode generation algorithm") \ |
| 737 | \ |
| 738 | product(bool, FilterSpuriousWakeups, true, \ |
| 739 | "When true prevents OS-level spurious, or premature, wakeups " \ |
| 740 | "from Object.wait (Ignored for Windows)") \ |
| 741 | \ |
| 742 | develop(bool, UsePthreads, false, \ |
| 743 | "Use pthread-based instead of libthread-based synchronization " \ |
| 744 | "(SPARC only)") \ |
| 745 | \ |
| 746 | product(bool, ReduceSignalUsage, false, \ |
| 747 | "Reduce the use of OS signals in Java and/or the VM") \ |
| 748 | \ |
| 749 | develop_pd(bool, ShareVtableStubs, \ |
| 750 | "Share vtable stubs (smaller code but worse branch prediction") \ |
| 751 | \ |
| 752 | develop(bool, LoadLineNumberTables, true, \ |
| 753 | "Tell whether the class file parser loads line number tables") \ |
| 754 | \ |
| 755 | develop(bool, LoadLocalVariableTables, true, \ |
| 756 | "Tell whether the class file parser loads local variable tables") \ |
| 757 | \ |
| 758 | develop(bool, LoadLocalVariableTypeTables, true, \ |
| 759 | "Tell whether the class file parser loads local variable type" \ |
| 760 | "tables") \ |
| 761 | \ |
| 762 | product(bool, AllowUserSignalHandlers, false, \ |
| 763 | "Do not complain if the application installs signal handlers " \ |
| 764 | "(Solaris & Linux only)") \ |
| 765 | \ |
| 766 | product(bool, UseSignalChaining, true, \ |
| 767 | "Use signal-chaining to invoke signal handlers installed " \ |
| 768 | "by the application (Solaris & Linux only)") \ |
| 769 | \ |
| 770 | product(bool, AllowJNIEnvProxy, false, \ |
| 771 | "(Deprecated) Allow JNIEnv proxies for jdbx") \ |
| 772 | \ |
| 773 | product(bool, RestoreMXCSROnJNICalls, false, \ |
| 774 | "Restore MXCSR when returning from JNI calls") \ |
| 775 | \ |
| 776 | product(bool, CheckJNICalls, false, \ |
| 777 | "Verify all arguments to JNI calls") \ |
| 778 | \ |
| 779 | product(bool, UseFastJNIAccessors, true, \ |
| 780 | "Use optimized versions of Get<Primitive>Field") \ |
| 781 | \ |
| 782 | product(intx, MaxJNILocalCapacity, 65536, \ |
| 783 | "Maximum allowable local JNI handle capacity to " \ |
| 784 | "EnsureLocalCapacity() and PushLocalFrame(), " \ |
| 785 | "where <= 0 is unlimited, default: 65536") \ |
| 786 | range(min_intx, max_intx) \ |
| 787 | \ |
| 788 | product(bool, EagerXrunInit, false, \ |
| 789 | "Eagerly initialize -Xrun libraries; allows startup profiling, " \ |
| 790 | "but not all -Xrun libraries may support the state of the VM " \ |
| 791 | "at this time") \ |
| 792 | \ |
| 793 | product(bool, PreserveAllAnnotations, false, \ |
| 794 | "Preserve RuntimeInvisibleAnnotations as well " \ |
| 795 | "as RuntimeVisibleAnnotations") \ |
| 796 | \ |
| 797 | develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ |
| 798 | "Number of OutOfMemoryErrors preallocated with backtrace") \ |
| 799 | \ |
| 800 | product(bool, UseXMMForArrayCopy, false, \ |
| 801 | "Use SSE2 MOVQ instruction for Arraycopy") \ |
| 802 | \ |
| 803 | product(intx, FieldsAllocationStyle, 1, \ |
| 804 | "0 - type based with oops first, " \ |
| 805 | "1 - with oops last, " \ |
| 806 | "2 - oops in super and sub classes are together") \ |
| 807 | range(0, 2) \ |
| 808 | \ |
| 809 | product(bool, CompactFields, true, \ |
| 810 | "Allocate nonstatic fields in gaps between previous fields") \ |
| 811 | \ |
| 812 | notproduct(bool, PrintFieldLayout, false, \ |
| 813 | "Print field layout for each class") \ |
| 814 | \ |
| 815 | /* Need to limit the extent of the padding to reasonable size. */\ |
| 816 | /* 8K is well beyond the reasonable HW cache line size, even with */\ |
| 817 | /* aggressive prefetching, while still leaving the room for segregating */\ |
| 818 | /* among the distinct pages. */\ |
| 819 | product(intx, ContendedPaddingWidth, 128, \ |
| 820 | "How many bytes to pad the fields/classes marked @Contended with")\ |
| 821 | range(0, 8192) \ |
| 822 | constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ |
| 823 | \ |
| 824 | product(bool, EnableContended, true, \ |
| 825 | "Enable @Contended annotation support") \ |
| 826 | \ |
| 827 | product(bool, RestrictContended, true, \ |
| 828 | "Restrict @Contended to trusted classes") \ |
| 829 | \ |
| 830 | product(bool, UseBiasedLocking, true, \ |
| 831 | "Enable biased locking in JVM") \ |
| 832 | \ |
| 833 | product(intx, BiasedLockingStartupDelay, 0, \ |
| 834 | "Number of milliseconds to wait before enabling biased locking") \ |
| 835 | range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ |
| 836 | constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ |
| 837 | \ |
| 838 | diagnostic(bool, PrintBiasedLockingStatistics, false, \ |
| 839 | "Print statistics of biased locking in JVM") \ |
| 840 | \ |
| 841 | product(intx, BiasedLockingBulkRebiasThreshold, 20, \ |
| 842 | "Threshold of number of revocations per type to try to " \ |
| 843 | "rebias all objects in the heap of that type") \ |
| 844 | range(0, max_intx) \ |
| 845 | constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ |
| 846 | \ |
| 847 | product(intx, BiasedLockingBulkRevokeThreshold, 40, \ |
| 848 | "Threshold of number of revocations per type to permanently " \ |
| 849 | "revoke biases of all objects in the heap of that type") \ |
| 850 | range(0, max_intx) \ |
| 851 | constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ |
| 852 | \ |
| 853 | product(intx, BiasedLockingDecayTime, 25000, \ |
| 854 | "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ |
| 855 | "type after previous bulk rebias") \ |
| 856 | range(500, max_intx) \ |
| 857 | constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ |
| 858 | \ |
| 859 | product(bool, ExitOnOutOfMemoryError, false, \ |
| 860 | "JVM exits on the first occurrence of an out-of-memory error") \ |
| 861 | \ |
| 862 | product(bool, CrashOnOutOfMemoryError, false, \ |
| 863 | "JVM aborts, producing an error log and core/mini dump, on the " \ |
| 864 | "first occurrence of an out-of-memory error") \ |
| 865 | \ |
| 866 | /* tracing */ \ |
| 867 | \ |
| 868 | develop(bool, StressRewriter, false, \ |
| 869 | "Stress linktime bytecode rewriting") \ |
| 870 | \ |
| 871 | product(ccstr, TraceJVMTI, NULL, \ |
| 872 | "Trace flags for JVMTI functions and events") \ |
| 873 | \ |
| 874 | /* This option can change an EMCP method into an obsolete method. */ \ |
| 875 | /* This can affect tests that except specific methods to be EMCP. */ \ |
| 876 | /* This option should be used with caution. */ \ |
| 877 | product(bool, StressLdcRewrite, false, \ |
| 878 | "Force ldc -> ldc_w rewrite during RedefineClasses") \ |
| 879 | \ |
| 880 | /* change to false by default sometime after Mustang */ \ |
| 881 | product(bool, VerifyMergedCPBytecodes, true, \ |
| 882 | "Verify bytecodes after RedefineClasses constant pool merging") \ |
| 883 | \ |
| 884 | product(bool, AllowRedefinitionToAddDeleteMethods, false, \ |
| 885 | "(Deprecated) Allow redefinition to add and delete private " \ |
| 886 | "static or final methods for compatibility with old releases") \ |
| 887 | \ |
| 888 | develop(bool, TraceBytecodes, false, \ |
| 889 | "Trace bytecode execution") \ |
| 890 | \ |
| 891 | develop(bool, TraceICs, false, \ |
| 892 | "Trace inline cache changes") \ |
| 893 | \ |
| 894 | notproduct(bool, TraceInvocationCounterOverflow, false, \ |
| 895 | "Trace method invocation counter overflow") \ |
| 896 | \ |
| 897 | develop(bool, TraceInlineCacheClearing, false, \ |
| 898 | "Trace clearing of inline caches in nmethods") \ |
| 899 | \ |
| 900 | develop(bool, TraceDependencies, false, \ |
| 901 | "Trace dependencies") \ |
| 902 | \ |
| 903 | develop(bool, VerifyDependencies, trueInDebug, \ |
| 904 | "Exercise and verify the compilation dependency mechanism") \ |
| 905 | \ |
| 906 | develop(bool, TraceNewOopMapGeneration, false, \ |
| 907 | "Trace OopMapGeneration") \ |
| 908 | \ |
| 909 | develop(bool, TraceNewOopMapGenerationDetailed, false, \ |
| 910 | "Trace OopMapGeneration: print detailed cell states") \ |
| 911 | \ |
| 912 | develop(bool, TimeOopMap, false, \ |
| 913 | "Time calls to GenerateOopMap::compute_map() in sum") \ |
| 914 | \ |
| 915 | develop(bool, TimeOopMap2, false, \ |
| 916 | "Time calls to GenerateOopMap::compute_map() individually") \ |
| 917 | \ |
| 918 | develop(bool, TraceOopMapRewrites, false, \ |
| 919 | "Trace rewriting of method oops during oop map generation") \ |
| 920 | \ |
| 921 | develop(bool, TraceICBuffer, false, \ |
| 922 | "Trace usage of IC buffer") \ |
| 923 | \ |
| 924 | develop(bool, TraceCompiledIC, false, \ |
| 925 | "Trace changes of compiled IC") \ |
| 926 | \ |
| 927 | develop(bool, FLSVerifyDictionary, false, \ |
| 928 | "Do lots of (expensive) FLS dictionary verification") \ |
| 929 | \ |
| 930 | \ |
| 931 | notproduct(bool, CheckMemoryInitialization, false, \ |
| 932 | "Check memory initialization") \ |
| 933 | \ |
| 934 | product(uintx, ProcessDistributionStride, 4, \ |
| 935 | "Stride through processors when distributing processes") \ |
| 936 | range(0, max_juint) \ |
| 937 | \ |
| 938 | develop(bool, TraceFinalizerRegistration, false, \ |
| 939 | "Trace registration of final references") \ |
| 940 | \ |
| 941 | product(bool, IgnoreEmptyClassPaths, false, \ |
| 942 | "Ignore empty path elements in -classpath") \ |
| 943 | \ |
| 944 | product(size_t, InitialBootClassLoaderMetaspaceSize, \ |
| 945 | NOT_LP64(2200*K) LP64_ONLY(4*M), \ |
| 946 | "Initial size of the boot class loader data metaspace") \ |
| 947 | range(30*K, max_uintx/BytesPerWord) \ |
| 948 | constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ |
| 949 | \ |
| 950 | product(bool, PrintHeapAtSIGBREAK, true, \ |
| 951 | "Print heap layout in response to SIGBREAK") \ |
| 952 | \ |
| 953 | manageable(bool, PrintClassHistogram, false, \ |
| 954 | "Print a histogram of class instances") \ |
| 955 | \ |
| 956 | experimental(double, ObjectCountCutOffPercent, 0.5, \ |
| 957 | "The percentage of the used heap that the instances of a class " \ |
| 958 | "must occupy for the class to generate a trace event") \ |
| 959 | range(0.0, 100.0) \ |
| 960 | \ |
| 961 | /* JVMTI heap profiling */ \ |
| 962 | \ |
| 963 | diagnostic(bool, TraceJVMTIObjectTagging, false, \ |
| 964 | "Trace JVMTI object tagging calls") \ |
| 965 | \ |
| 966 | diagnostic(bool, VerifyBeforeIteration, false, \ |
| 967 | "Verify memory system before JVMTI iteration") \ |
| 968 | \ |
| 969 | /* compiler interface */ \ |
| 970 | \ |
| 971 | develop(bool, CIPrintCompilerName, false, \ |
| 972 | "when CIPrint is active, print the name of the active compiler") \ |
| 973 | \ |
| 974 | diagnostic(bool, CIPrintCompileQueue, false, \ |
| 975 | "display the contents of the compile queue whenever a " \ |
| 976 | "compilation is enqueued") \ |
| 977 | \ |
| 978 | develop(bool, CIPrintRequests, false, \ |
| 979 | "display every request for compilation") \ |
| 980 | \ |
| 981 | product(bool, CITime, false, \ |
| 982 | "collect timing information for compilation") \ |
| 983 | \ |
| 984 | develop(bool, CITimeVerbose, false, \ |
| 985 | "be more verbose in compilation timings") \ |
| 986 | \ |
| 987 | develop(bool, CITimeEach, false, \ |
| 988 | "display timing information after each successful compilation") \ |
| 989 | \ |
| 990 | develop(bool, CICountOSR, false, \ |
| 991 | "use a separate counter when assigning ids to osr compilations") \ |
| 992 | \ |
| 993 | develop(bool, CICompileNatives, true, \ |
| 994 | "compile native methods if supported by the compiler") \ |
| 995 | \ |
| 996 | develop_pd(bool, CICompileOSR, \ |
| 997 | "compile on stack replacement methods if supported by the " \ |
| 998 | "compiler") \ |
| 999 | \ |
| 1000 | develop(bool, CIPrintMethodCodes, false, \ |
| 1001 | "print method bytecodes of the compiled code") \ |
| 1002 | \ |
| 1003 | develop(bool, CIPrintTypeFlow, false, \ |
| 1004 | "print the results of ciTypeFlow analysis") \ |
| 1005 | \ |
| 1006 | develop(bool, CITraceTypeFlow, false, \ |
| 1007 | "detailed per-bytecode tracing of ciTypeFlow analysis") \ |
| 1008 | \ |
| 1009 | develop(intx, OSROnlyBCI, -1, \ |
| 1010 | "OSR only at this bci. Negative values mean exclude that bci") \ |
| 1011 | \ |
| 1012 | /* compiler */ \ |
| 1013 | \ |
| 1014 | /* notice: the max range value here is max_jint, not max_intx */ \ |
| 1015 | /* because of overflow issue */ \ |
| 1016 | product(intx, CICompilerCount, CI_COMPILER_COUNT, \ |
| 1017 | "Number of compiler threads to run") \ |
| 1018 | range(0, max_jint) \ |
| 1019 | constraint(CICompilerCountConstraintFunc, AfterErgo) \ |
| 1020 | \ |
| 1021 | product(bool, UseDynamicNumberOfCompilerThreads, true, \ |
| 1022 | "Dynamically choose the number of parallel compiler threads") \ |
| 1023 | \ |
| 1024 | diagnostic(bool, ReduceNumberOfCompilerThreads, true, \ |
| 1025 | "Reduce the number of parallel compiler threads when they " \ |
| 1026 | "are not used") \ |
| 1027 | \ |
| 1028 | diagnostic(bool, TraceCompilerThreads, false, \ |
| 1029 | "Trace creation and removal of compiler threads") \ |
| 1030 | \ |
| 1031 | develop(bool, InjectCompilerCreationFailure, false, \ |
| 1032 | "Inject thread creation failures for " \ |
| 1033 | "UseDynamicNumberOfCompilerThreads") \ |
| 1034 | \ |
| 1035 | product(intx, CompilationPolicyChoice, 0, \ |
| 1036 | "which compilation policy (0-2)") \ |
| 1037 | range(0, 2) \ |
| 1038 | \ |
| 1039 | develop(bool, UseStackBanging, true, \ |
| 1040 | "use stack banging for stack overflow checks (required for " \ |
| 1041 | "proper StackOverflow handling; disable only to measure cost " \ |
| 1042 | "of stackbanging)") \ |
| 1043 | \ |
| 1044 | develop(bool, UseStrictFP, true, \ |
| 1045 | "use strict fp if modifier strictfp is set") \ |
| 1046 | \ |
| 1047 | develop(bool, GenerateSynchronizationCode, true, \ |
| 1048 | "generate locking/unlocking code for synchronized methods and " \ |
| 1049 | "monitors") \ |
| 1050 | \ |
| 1051 | develop(bool, GenerateRangeChecks, true, \ |
| 1052 | "Generate range checks for array accesses") \ |
| 1053 | \ |
| 1054 | diagnostic_pd(bool, ImplicitNullChecks, \ |
| 1055 | "Generate code for implicit null checks") \ |
| 1056 | \ |
| 1057 | product_pd(bool, TrapBasedNullChecks, \ |
| 1058 | "Generate code for null checks that uses a cmp and trap " \ |
| 1059 | "instruction raising SIGTRAP. This is only used if an access to" \ |
| 1060 | "null (+offset) will not raise a SIGSEGV, i.e.," \ |
| 1061 | "ImplicitNullChecks don't work (PPC64).") \ |
| 1062 | \ |
| 1063 | diagnostic(bool, EnableThreadSMRExtraValidityChecks, true, \ |
| 1064 | "Enable Thread SMR extra validity checks") \ |
| 1065 | \ |
| 1066 | diagnostic(bool, EnableThreadSMRStatistics, trueInDebug, \ |
| 1067 | "Enable Thread SMR Statistics") \ |
| 1068 | \ |
| 1069 | product(bool, Inline, true, \ |
| 1070 | "Enable inlining") \ |
| 1071 | \ |
| 1072 | product(bool, ClipInlining, true, \ |
| 1073 | "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ |
| 1074 | \ |
| 1075 | develop(bool, UseCHA, true, \ |
| 1076 | "Enable CHA") \ |
| 1077 | \ |
| 1078 | product(bool, UseTypeProfile, true, \ |
| 1079 | "Check interpreter profile for historically monomorphic calls") \ |
| 1080 | \ |
| 1081 | diagnostic(bool, PrintInlining, false, \ |
| 1082 | "Print inlining optimizations") \ |
| 1083 | \ |
| 1084 | product(bool, UsePopCountInstruction, false, \ |
| 1085 | "Use population count instruction") \ |
| 1086 | \ |
| 1087 | develop(bool, EagerInitialization, false, \ |
| 1088 | "Eagerly initialize classes if possible") \ |
| 1089 | \ |
| 1090 | diagnostic(bool, LogTouchedMethods, false, \ |
| 1091 | "Log methods which have been ever touched in runtime") \ |
| 1092 | \ |
| 1093 | diagnostic(bool, PrintTouchedMethodsAtExit, false, \ |
| 1094 | "Print all methods that have been ever touched in runtime") \ |
| 1095 | \ |
| 1096 | develop(bool, TraceMethodReplacement, false, \ |
| 1097 | "Print when methods are replaced do to recompilation") \ |
| 1098 | \ |
| 1099 | develop(bool, PrintMethodFlushing, false, \ |
| 1100 | "Print the nmethods being flushed") \ |
| 1101 | \ |
| 1102 | diagnostic(bool, PrintMethodFlushingStatistics, false, \ |
| 1103 | "print statistics about method flushing") \ |
| 1104 | \ |
| 1105 | diagnostic(intx, HotMethodDetectionLimit, 100000, \ |
| 1106 | "Number of compiled code invocations after which " \ |
| 1107 | "the method is considered as hot by the flusher") \ |
| 1108 | range(1, max_jint) \ |
| 1109 | \ |
| 1110 | diagnostic(intx, MinPassesBeforeFlush, 10, \ |
| 1111 | "Minimum number of sweeper passes before an nmethod " \ |
| 1112 | "can be flushed") \ |
| 1113 | range(0, max_intx) \ |
| 1114 | \ |
| 1115 | product(bool, UseCodeAging, true, \ |
| 1116 | "Insert counter to detect warm methods") \ |
| 1117 | \ |
| 1118 | diagnostic(bool, StressCodeAging, false, \ |
| 1119 | "Start with counters compiled in") \ |
| 1120 | \ |
| 1121 | develop(bool, StressCodeBuffers, false, \ |
| 1122 | "Exercise code buffer expansion and other rare state changes") \ |
| 1123 | \ |
| 1124 | diagnostic(bool, DebugNonSafepoints, trueInDebug, \ |
| 1125 | "Generate extra debugging information for non-safepoints in " \ |
| 1126 | "nmethods") \ |
| 1127 | \ |
| 1128 | product(bool, PrintVMOptions, false, \ |
| 1129 | "Print flags that appeared on the command line") \ |
| 1130 | \ |
| 1131 | product(bool, IgnoreUnrecognizedVMOptions, false, \ |
| 1132 | "Ignore unrecognized VM options") \ |
| 1133 | \ |
| 1134 | product(bool, PrintCommandLineFlags, false, \ |
| 1135 | "Print flags specified on command line or set by ergonomics") \ |
| 1136 | \ |
| 1137 | product(bool, PrintFlagsInitial, false, \ |
| 1138 | "Print all VM flags before argument processing and exit VM") \ |
| 1139 | \ |
| 1140 | product(bool, PrintFlagsFinal, false, \ |
| 1141 | "Print all VM flags after argument and ergonomic processing") \ |
| 1142 | \ |
| 1143 | notproduct(bool, PrintFlagsWithComments, false, \ |
| 1144 | "Print all VM flags with default values and descriptions and " \ |
| 1145 | "exit") \ |
| 1146 | \ |
| 1147 | product(bool, PrintFlagsRanges, false, \ |
| 1148 | "Print VM flags and their ranges") \ |
| 1149 | \ |
| 1150 | diagnostic(bool, SerializeVMOutput, true, \ |
| 1151 | "Use a mutex to serialize output to tty and LogFile") \ |
| 1152 | \ |
| 1153 | diagnostic(bool, DisplayVMOutput, true, \ |
| 1154 | "Display all VM output on the tty, independently of LogVMOutput") \ |
| 1155 | \ |
| 1156 | diagnostic(bool, LogVMOutput, false, \ |
| 1157 | "Save VM output to LogFile") \ |
| 1158 | \ |
| 1159 | diagnostic(ccstr, LogFile, NULL, \ |
| 1160 | "If LogVMOutput or LogCompilation is on, save VM output to " \ |
| 1161 | "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ |
| 1162 | \ |
| 1163 | product(ccstr, ErrorFile, NULL, \ |
| 1164 | "If an error occurs, save the error data to this file " \ |
| 1165 | "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ |
| 1166 | \ |
| 1167 | product(bool, ExtensiveErrorReports, \ |
| 1168 | PRODUCT_ONLY(false) NOT_PRODUCT(true), \ |
| 1169 | "Error reports are more extensive.") \ |
| 1170 | \ |
| 1171 | product(bool, DisplayVMOutputToStderr, false, \ |
| 1172 | "If DisplayVMOutput is true, display all VM output to stderr") \ |
| 1173 | \ |
| 1174 | product(bool, DisplayVMOutputToStdout, false, \ |
| 1175 | "If DisplayVMOutput is true, display all VM output to stdout") \ |
| 1176 | \ |
| 1177 | product(bool, ErrorFileToStderr, false, \ |
| 1178 | "If true, error data is printed to stderr instead of a file") \ |
| 1179 | \ |
| 1180 | product(bool, ErrorFileToStdout, false, \ |
| 1181 | "If true, error data is printed to stdout instead of a file") \ |
| 1182 | \ |
| 1183 | product(bool, UseHeavyMonitors, false, \ |
| 1184 | "use heavyweight instead of lightweight Java monitors") \ |
| 1185 | \ |
| 1186 | product(bool, PrintStringTableStatistics, false, \ |
| 1187 | "print statistics about the StringTable and SymbolTable") \ |
| 1188 | \ |
| 1189 | diagnostic(bool, VerifyStringTableAtExit, false, \ |
| 1190 | "verify StringTable contents at exit") \ |
| 1191 | \ |
| 1192 | notproduct(bool, PrintSymbolTableSizeHistogram, false, \ |
| 1193 | "print histogram of the symbol table") \ |
| 1194 | \ |
| 1195 | notproduct(bool, ExitVMOnVerifyError, false, \ |
| 1196 | "standard exit from VM if bytecode verify error " \ |
| 1197 | "(only in debug mode)") \ |
| 1198 | \ |
| 1199 | diagnostic(ccstr, AbortVMOnException, NULL, \ |
| 1200 | "Call fatal if this exception is thrown. Example: " \ |
| 1201 | "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ |
| 1202 | \ |
| 1203 | diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ |
| 1204 | "Call fatal if the exception pointed by AbortVMOnException " \ |
| 1205 | "has this message") \ |
| 1206 | \ |
| 1207 | develop(bool, DebugVtables, false, \ |
| 1208 | "add debugging code to vtable dispatch") \ |
| 1209 | \ |
| 1210 | notproduct(bool, PrintVtableStats, false, \ |
| 1211 | "print vtables stats at end of run") \ |
| 1212 | \ |
| 1213 | develop(bool, TraceCreateZombies, false, \ |
| 1214 | "trace creation of zombie nmethods") \ |
| 1215 | \ |
| 1216 | notproduct(bool, IgnoreLockingAssertions, false, \ |
| 1217 | "disable locking assertions (for speed)") \ |
| 1218 | \ |
| 1219 | product(bool, RangeCheckElimination, true, \ |
| 1220 | "Eliminate range checks") \ |
| 1221 | \ |
| 1222 | develop_pd(bool, UncommonNullCast, \ |
| 1223 | "track occurrences of null in casts; adjust compiler tactics") \ |
| 1224 | \ |
| 1225 | develop(bool, TypeProfileCasts, true, \ |
| 1226 | "treat casts like calls for purposes of type profiling") \ |
| 1227 | \ |
| 1228 | develop(bool, TraceLivenessGen, false, \ |
| 1229 | "Trace the generation of liveness analysis information") \ |
| 1230 | \ |
| 1231 | notproduct(bool, TraceLivenessQuery, false, \ |
| 1232 | "Trace queries of liveness analysis information") \ |
| 1233 | \ |
| 1234 | notproduct(bool, CollectIndexSetStatistics, false, \ |
| 1235 | "Collect information about IndexSets") \ |
| 1236 | \ |
| 1237 | develop(bool, UseLoopSafepoints, true, \ |
| 1238 | "Generate Safepoint nodes in every loop") \ |
| 1239 | \ |
| 1240 | develop(intx, FastAllocateSizeLimit, 128*K, \ |
| 1241 | /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ |
| 1242 | "Inline allocations larger than this in doublewords must go slow")\ |
| 1243 | \ |
| 1244 | product_pd(bool, CompactStrings, \ |
| 1245 | "Enable Strings to use single byte chars in backing store") \ |
| 1246 | \ |
| 1247 | product_pd(uintx, TypeProfileLevel, \ |
| 1248 | "=XYZ, with Z: Type profiling of arguments at call; " \ |
| 1249 | "Y: Type profiling of return value at call; " \ |
| 1250 | "X: Type profiling of parameters to methods; " \ |
| 1251 | "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ |
| 1252 | constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ |
| 1253 | \ |
| 1254 | product(intx, TypeProfileArgsLimit, 2, \ |
| 1255 | "max number of call arguments to consider for type profiling") \ |
| 1256 | range(0, 16) \ |
| 1257 | \ |
| 1258 | product(intx, TypeProfileParmsLimit, 2, \ |
| 1259 | "max number of incoming parameters to consider for type profiling"\ |
| 1260 | ", -1 for all") \ |
| 1261 | range(-1, 64) \ |
| 1262 | \ |
| 1263 | /* statistics */ \ |
| 1264 | develop(bool, CountCompiledCalls, false, \ |
| 1265 | "Count method invocations") \ |
| 1266 | \ |
| 1267 | notproduct(bool, CountRuntimeCalls, false, \ |
| 1268 | "Count VM runtime calls") \ |
| 1269 | \ |
| 1270 | develop(bool, CountJNICalls, false, \ |
| 1271 | "Count jni method invocations") \ |
| 1272 | \ |
| 1273 | notproduct(bool, CountJVMCalls, false, \ |
| 1274 | "Count jvm method invocations") \ |
| 1275 | \ |
| 1276 | notproduct(bool, CountRemovableExceptions, false, \ |
| 1277 | "Count exceptions that could be replaced by branches due to " \ |
| 1278 | "inlining") \ |
| 1279 | \ |
| 1280 | notproduct(bool, ICMissHistogram, false, \ |
| 1281 | "Produce histogram of IC misses") \ |
| 1282 | \ |
| 1283 | /* interpreter */ \ |
| 1284 | product_pd(bool, RewriteBytecodes, \ |
| 1285 | "Allow rewriting of bytecodes (bytecodes are not immutable)") \ |
| 1286 | \ |
| 1287 | product_pd(bool, RewriteFrequentPairs, \ |
| 1288 | "Rewrite frequently used bytecode pairs into a single bytecode") \ |
| 1289 | \ |
| 1290 | diagnostic(bool, PrintInterpreter, false, \ |
| 1291 | "Print the generated interpreter code") \ |
| 1292 | \ |
| 1293 | product(bool, UseInterpreter, true, \ |
| 1294 | "Use interpreter for non-compiled methods") \ |
| 1295 | \ |
| 1296 | develop(bool, UseFastSignatureHandlers, true, \ |
| 1297 | "Use fast signature handlers for native calls") \ |
| 1298 | \ |
| 1299 | product(bool, UseLoopCounter, true, \ |
| 1300 | "Increment invocation counter on backward branch") \ |
| 1301 | \ |
| 1302 | product_pd(bool, UseOnStackReplacement, \ |
| 1303 | "Use on stack replacement, calls runtime if invoc. counter " \ |
| 1304 | "overflows in loop") \ |
| 1305 | \ |
| 1306 | notproduct(bool, TraceOnStackReplacement, false, \ |
| 1307 | "Trace on stack replacement") \ |
| 1308 | \ |
| 1309 | product_pd(bool, PreferInterpreterNativeStubs, \ |
| 1310 | "Use always interpreter stubs for native methods invoked via " \ |
| 1311 | "interpreter") \ |
| 1312 | \ |
| 1313 | develop(bool, CountBytecodes, false, \ |
| 1314 | "Count number of bytecodes executed") \ |
| 1315 | \ |
| 1316 | develop(bool, PrintBytecodeHistogram, false, \ |
| 1317 | "Print histogram of the executed bytecodes") \ |
| 1318 | \ |
| 1319 | develop(bool, PrintBytecodePairHistogram, false, \ |
| 1320 | "Print histogram of the executed bytecode pairs") \ |
| 1321 | \ |
| 1322 | diagnostic(bool, PrintSignatureHandlers, false, \ |
| 1323 | "Print code generated for native method signature handlers") \ |
| 1324 | \ |
| 1325 | develop(bool, VerifyOops, false, \ |
| 1326 | "Do plausibility checks for oops") \ |
| 1327 | \ |
| 1328 | develop(bool, CheckUnhandledOops, false, \ |
| 1329 | "Check for unhandled oops in VM code") \ |
| 1330 | \ |
| 1331 | develop(bool, VerifyJNIFields, trueInDebug, \ |
| 1332 | "Verify jfieldIDs for instance fields") \ |
| 1333 | \ |
| 1334 | notproduct(bool, VerifyJNIEnvThread, false, \ |
| 1335 | "Verify JNIEnv.thread == Thread::current() when entering VM " \ |
| 1336 | "from JNI") \ |
| 1337 | \ |
| 1338 | develop(bool, VerifyFPU, false, \ |
| 1339 | "Verify FPU state (check for NaN's, etc.)") \ |
| 1340 | \ |
| 1341 | develop(bool, VerifyThread, false, \ |
| 1342 | "Watch the thread register for corruption (SPARC only)") \ |
| 1343 | \ |
| 1344 | develop(bool, VerifyActivationFrameSize, false, \ |
| 1345 | "Verify that activation frame didn't become smaller than its " \ |
| 1346 | "minimal size") \ |
| 1347 | \ |
| 1348 | develop(bool, TraceFrequencyInlining, false, \ |
| 1349 | "Trace frequency based inlining") \ |
| 1350 | \ |
| 1351 | develop_pd(bool, InlineIntrinsics, \ |
| 1352 | "Inline intrinsics that can be statically resolved") \ |
| 1353 | \ |
| 1354 | product_pd(bool, ProfileInterpreter, \ |
| 1355 | "Profile at the bytecode level during interpretation") \ |
| 1356 | \ |
| 1357 | develop(bool, TraceProfileInterpreter, false, \ |
| 1358 | "Trace profiling at the bytecode level during interpretation. " \ |
| 1359 | "This outputs the profiling information collected to improve " \ |
| 1360 | "jit compilation.") \ |
| 1361 | \ |
| 1362 | develop_pd(bool, ProfileTraps, \ |
| 1363 | "Profile deoptimization traps at the bytecode level") \ |
| 1364 | \ |
| 1365 | product(intx, ProfileMaturityPercentage, 20, \ |
| 1366 | "number of method invocations/branches (expressed as % of " \ |
| 1367 | "CompileThreshold) before using the method's profile") \ |
| 1368 | range(0, 100) \ |
| 1369 | \ |
| 1370 | diagnostic(bool, PrintMethodData, false, \ |
| 1371 | "Print the results of +ProfileInterpreter at end of run") \ |
| 1372 | \ |
| 1373 | develop(bool, VerifyDataPointer, trueInDebug, \ |
| 1374 | "Verify the method data pointer during interpreter profiling") \ |
| 1375 | \ |
| 1376 | develop(bool, VerifyCompiledCode, false, \ |
| 1377 | "Include miscellaneous runtime verifications in nmethod code; " \ |
| 1378 | "default off because it disturbs nmethod size heuristics") \ |
| 1379 | \ |
| 1380 | notproduct(bool, CrashGCForDumpingJavaThread, false, \ |
| 1381 | "Manually make GC thread crash then dump java stack trace; " \ |
| 1382 | "Test only") \ |
| 1383 | \ |
| 1384 | /* compilation */ \ |
| 1385 | product(bool, UseCompiler, true, \ |
| 1386 | "Use Just-In-Time compilation") \ |
| 1387 | \ |
| 1388 | product(bool, UseCounterDecay, true, \ |
| 1389 | "Adjust recompilation counters") \ |
| 1390 | \ |
| 1391 | develop(intx, CounterHalfLifeTime, 30, \ |
| 1392 | "Half-life time of invocation counters (in seconds)") \ |
| 1393 | \ |
| 1394 | develop(intx, CounterDecayMinIntervalLength, 500, \ |
| 1395 | "The minimum interval (in milliseconds) between invocation of " \ |
| 1396 | "CounterDecay") \ |
| 1397 | \ |
| 1398 | product(bool, AlwaysCompileLoopMethods, false, \ |
| 1399 | "When using recompilation, never interpret methods " \ |
| 1400 | "containing loops") \ |
| 1401 | \ |
| 1402 | product(bool, DontCompileHugeMethods, true, \ |
| 1403 | "Do not compile methods > HugeMethodLimit") \ |
| 1404 | \ |
| 1405 | /* Bytecode escape analysis estimation. */ \ |
| 1406 | product(bool, EstimateArgEscape, true, \ |
| 1407 | "Analyze bytecodes to estimate escape state of arguments") \ |
| 1408 | \ |
| 1409 | product(intx, BCEATraceLevel, 0, \ |
| 1410 | "How much tracing to do of bytecode escape analysis estimates " \ |
| 1411 | "(0-3)") \ |
| 1412 | range(0, 3) \ |
| 1413 | \ |
| 1414 | product(intx, MaxBCEAEstimateLevel, 5, \ |
| 1415 | "Maximum number of nested calls that are analyzed by BC EA") \ |
| 1416 | range(0, max_jint) \ |
| 1417 | \ |
| 1418 | product(intx, MaxBCEAEstimateSize, 150, \ |
| 1419 | "Maximum bytecode size of a method to be analyzed by BC EA") \ |
| 1420 | range(0, max_jint) \ |
| 1421 | \ |
| 1422 | product(intx, AllocatePrefetchStyle, 1, \ |
| 1423 | "0 = no prefetch, " \ |
| 1424 | "1 = generate prefetch instructions for each allocation, " \ |
| 1425 | "2 = use TLAB watermark to gate allocation prefetch, " \ |
| 1426 | "3 = generate one prefetch instruction per cache line") \ |
| 1427 | range(0, 3) \ |
| 1428 | \ |
| 1429 | product(intx, AllocatePrefetchDistance, -1, \ |
| 1430 | "Distance to prefetch ahead of allocation pointer. " \ |
| 1431 | "-1: use system-specific value (automatically determined") \ |
| 1432 | constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ |
| 1433 | \ |
| 1434 | product(intx, AllocatePrefetchLines, 3, \ |
| 1435 | "Number of lines to prefetch ahead of array allocation pointer") \ |
| 1436 | range(1, 64) \ |
| 1437 | \ |
| 1438 | product(intx, AllocateInstancePrefetchLines, 1, \ |
| 1439 | "Number of lines to prefetch ahead of instance allocation " \ |
| 1440 | "pointer") \ |
| 1441 | range(1, 64) \ |
| 1442 | \ |
| 1443 | product(intx, AllocatePrefetchStepSize, 16, \ |
| 1444 | "Step size in bytes of sequential prefetch instructions") \ |
| 1445 | range(1, 512) \ |
| 1446 | constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ |
| 1447 | \ |
| 1448 | product(intx, AllocatePrefetchInstr, 0, \ |
| 1449 | "Select instruction to prefetch ahead of allocation pointer") \ |
| 1450 | constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit) \ |
| 1451 | \ |
| 1452 | /* deoptimization */ \ |
| 1453 | develop(bool, TraceDeoptimization, false, \ |
| 1454 | "Trace deoptimization") \ |
| 1455 | \ |
| 1456 | develop(bool, PrintDeoptimizationDetails, false, \ |
| 1457 | "Print more information about deoptimization") \ |
| 1458 | \ |
| 1459 | develop(bool, DebugDeoptimization, false, \ |
| 1460 | "Tracing various information while debugging deoptimization") \ |
| 1461 | \ |
| 1462 | product(intx, SelfDestructTimer, 0, \ |
| 1463 | "Will cause VM to terminate after a given time (in minutes) " \ |
| 1464 | "(0 means off)") \ |
| 1465 | range(0, max_intx) \ |
| 1466 | \ |
| 1467 | product(intx, MaxJavaStackTraceDepth, 1024, \ |
| 1468 | "The maximum number of lines in the stack trace for Java " \ |
| 1469 | "exceptions (0 means all)") \ |
| 1470 | range(0, max_jint/2) \ |
| 1471 | \ |
| 1472 | /* notice: the max range value here is max_jint, not max_intx */ \ |
| 1473 | /* because of overflow issue */ \ |
| 1474 | diagnostic(intx, GuaranteedSafepointInterval, 1000, \ |
| 1475 | "Guarantee a safepoint (at least) every so many milliseconds " \ |
| 1476 | "(0 means none)") \ |
| 1477 | range(0, max_jint) \ |
| 1478 | \ |
| 1479 | product(intx, SafepointTimeoutDelay, 10000, \ |
| 1480 | "Delay in milliseconds for option SafepointTimeout") \ |
| 1481 | LP64_ONLY(range(0, max_intx/MICROUNITS)) \ |
| 1482 | NOT_LP64(range(0, max_intx)) \ |
| 1483 | \ |
| 1484 | product(intx, NmethodSweepActivity, 10, \ |
| 1485 | "Removes cold nmethods from code cache if > 0. Higher values " \ |
| 1486 | "result in more aggressive sweeping") \ |
| 1487 | range(0, 2000) \ |
| 1488 | \ |
| 1489 | notproduct(bool, LogSweeper, false, \ |
| 1490 | "Keep a ring buffer of sweeper activity") \ |
| 1491 | \ |
| 1492 | notproduct(intx, SweeperLogEntries, 1024, \ |
| 1493 | "Number of records in the ring buffer of sweeper activity") \ |
| 1494 | \ |
| 1495 | notproduct(intx, MemProfilingInterval, 500, \ |
| 1496 | "Time between each invocation of the MemProfiler") \ |
| 1497 | \ |
| 1498 | develop(intx, MallocCatchPtr, -1, \ |
| 1499 | "Hit breakpoint when mallocing/freeing this pointer") \ |
| 1500 | \ |
| 1501 | notproduct(ccstrlist, SuppressErrorAt, "", \ |
| 1502 | "List of assertions (file:line) to muzzle") \ |
| 1503 | \ |
| 1504 | develop(intx, StackPrintLimit, 100, \ |
| 1505 | "number of stack frames to print in VM-level stack dump") \ |
| 1506 | \ |
| 1507 | notproduct(intx, MaxElementPrintSize, 256, \ |
| 1508 | "maximum number of elements to print") \ |
| 1509 | \ |
| 1510 | notproduct(intx, MaxSubklassPrintSize, 4, \ |
| 1511 | "maximum number of subklasses to print when printing klass") \ |
| 1512 | \ |
| 1513 | product(intx, MaxInlineLevel, 9, \ |
| 1514 | "maximum number of nested calls that are inlined") \ |
| 1515 | range(0, max_jint) \ |
| 1516 | \ |
| 1517 | product(intx, MaxRecursiveInlineLevel, 1, \ |
| 1518 | "maximum number of nested recursive calls that are inlined") \ |
| 1519 | range(0, max_jint) \ |
| 1520 | \ |
| 1521 | develop(intx, MaxForceInlineLevel, 100, \ |
| 1522 | "maximum number of nested calls that are forced for inlining " \ |
| 1523 | "(using CompileCommand or marked w/ @ForceInline)") \ |
| 1524 | range(0, max_jint) \ |
| 1525 | \ |
| 1526 | product_pd(intx, InlineSmallCode, \ |
| 1527 | "Only inline already compiled methods if their code size is " \ |
| 1528 | "less than this") \ |
| 1529 | range(0, max_jint) \ |
| 1530 | \ |
| 1531 | product(intx, MaxInlineSize, 35, \ |
| 1532 | "The maximum bytecode size of a method to be inlined") \ |
| 1533 | range(0, max_jint) \ |
| 1534 | \ |
| 1535 | product_pd(intx, FreqInlineSize, \ |
| 1536 | "The maximum bytecode size of a frequent method to be inlined") \ |
| 1537 | range(0, max_jint) \ |
| 1538 | \ |
| 1539 | product(intx, MaxTrivialSize, 6, \ |
| 1540 | "The maximum bytecode size of a trivial method to be inlined") \ |
| 1541 | range(0, max_jint) \ |
| 1542 | \ |
| 1543 | product(intx, MinInliningThreshold, 250, \ |
| 1544 | "The minimum invocation count a method needs to have to be " \ |
| 1545 | "inlined") \ |
| 1546 | range(0, max_jint) \ |
| 1547 | \ |
| 1548 | develop(intx, MethodHistogramCutoff, 100, \ |
| 1549 | "The cutoff value for method invocation histogram (+CountCalls)") \ |
| 1550 | \ |
| 1551 | develop(intx, DontYieldALotInterval, 10, \ |
| 1552 | "Interval between which yields will be dropped (milliseconds)") \ |
| 1553 | \ |
| 1554 | notproduct(intx, DeoptimizeALotInterval, 5, \ |
| 1555 | "Number of exits until DeoptimizeALot kicks in") \ |
| 1556 | \ |
| 1557 | notproduct(intx, ZombieALotInterval, 5, \ |
| 1558 | "Number of exits until ZombieALot kicks in") \ |
| 1559 | \ |
| 1560 | diagnostic(uintx, MallocMaxTestWords, 0, \ |
| 1561 | "If non-zero, maximum number of words that malloc/realloc can " \ |
| 1562 | "allocate (for testing only)") \ |
| 1563 | range(0, max_uintx) \ |
| 1564 | \ |
| 1565 | product(intx, TypeProfileWidth, 2, \ |
| 1566 | "Number of receiver types to record in call/cast profile") \ |
| 1567 | range(0, 8) \ |
| 1568 | \ |
| 1569 | develop(intx, BciProfileWidth, 2, \ |
| 1570 | "Number of return bci's to record in ret profile") \ |
| 1571 | \ |
| 1572 | product(intx, PerMethodRecompilationCutoff, 400, \ |
| 1573 | "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ |
| 1574 | range(-1, max_intx) \ |
| 1575 | \ |
| 1576 | product(intx, PerBytecodeRecompilationCutoff, 200, \ |
| 1577 | "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ |
| 1578 | range(-1, max_intx) \ |
| 1579 | \ |
| 1580 | product(intx, PerMethodTrapLimit, 100, \ |
| 1581 | "Limit on traps (of one kind) in a method (includes inlines)") \ |
| 1582 | range(0, max_jint) \ |
| 1583 | \ |
| 1584 | experimental(intx, PerMethodSpecTrapLimit, 5000, \ |
| 1585 | "Limit on speculative traps (of one kind) in a method " \ |
| 1586 | "(includes inlines)") \ |
| 1587 | range(0, max_jint) \ |
| 1588 | \ |
| 1589 | product(intx, PerBytecodeTrapLimit, 4, \ |
| 1590 | "Limit on traps (of one kind) at a particular BCI") \ |
| 1591 | range(0, max_jint) \ |
| 1592 | \ |
| 1593 | experimental(intx, SpecTrapLimitExtraEntries, 3, \ |
| 1594 | "Extra method data trap entries for speculation") \ |
| 1595 | \ |
| 1596 | develop(intx, InlineFrequencyRatio, 20, \ |
| 1597 | "Ratio of call site execution to caller method invocation") \ |
| 1598 | range(0, max_jint) \ |
| 1599 | \ |
| 1600 | diagnostic_pd(intx, InlineFrequencyCount, \ |
| 1601 | "Count of call site execution necessary to trigger frequent " \ |
| 1602 | "inlining") \ |
| 1603 | range(0, max_jint) \ |
| 1604 | \ |
| 1605 | develop(intx, InlineThrowCount, 50, \ |
| 1606 | "Force inlining of interpreted methods that throw this often") \ |
| 1607 | range(0, max_jint) \ |
| 1608 | \ |
| 1609 | develop(intx, InlineThrowMaxSize, 200, \ |
| 1610 | "Force inlining of throwing methods smaller than this") \ |
| 1611 | range(0, max_jint) \ |
| 1612 | \ |
| 1613 | develop(intx, ProfilerNodeSize, 1024, \ |
| 1614 | "Size in K to allocate for the Profile Nodes of each thread") \ |
| 1615 | range(0, 1024) \ |
| 1616 | \ |
| 1617 | product_pd(size_t, MetaspaceSize, \ |
| 1618 | "Initial threshold (in bytes) at which a garbage collection " \ |
| 1619 | "is done to reduce Metaspace usage") \ |
| 1620 | constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ |
| 1621 | \ |
| 1622 | product(size_t, MaxMetaspaceSize, max_uintx, \ |
| 1623 | "Maximum size of Metaspaces (in bytes)") \ |
| 1624 | constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ |
| 1625 | \ |
| 1626 | product(size_t, CompressedClassSpaceSize, 1*G, \ |
| 1627 | "Maximum size of class area in Metaspace when compressed " \ |
| 1628 | "class pointers are used") \ |
| 1629 | range(1*M, 3*G) \ |
| 1630 | \ |
| 1631 | manageable(uintx, MinHeapFreeRatio, 40, \ |
| 1632 | "The minimum percentage of heap free after GC to avoid expansion."\ |
| 1633 | " For most GCs this applies to the old generation. In G1 and" \ |
| 1634 | " ParallelGC it applies to the whole heap.") \ |
| 1635 | range(0, 100) \ |
| 1636 | constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ |
| 1637 | \ |
| 1638 | manageable(uintx, MaxHeapFreeRatio, 70, \ |
| 1639 | "The maximum percentage of heap free after GC to avoid shrinking."\ |
| 1640 | " For most GCs this applies to the old generation. In G1 and" \ |
| 1641 | " ParallelGC it applies to the whole heap.") \ |
| 1642 | range(0, 100) \ |
| 1643 | constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ |
| 1644 | \ |
| 1645 | product(bool, ShrinkHeapInSteps, true, \ |
| 1646 | "When disabled, informs the GC to shrink the java heap directly" \ |
| 1647 | " to the target size at the next full GC rather than requiring" \ |
| 1648 | " smaller steps during multiple full GCs.") \ |
| 1649 | \ |
| 1650 | product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ |
| 1651 | "Number of milliseconds per MB of free space in the heap") \ |
| 1652 | range(0, max_intx) \ |
| 1653 | constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ |
| 1654 | \ |
| 1655 | product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ |
| 1656 | "The minimum change in heap space due to GC (in bytes)") \ |
| 1657 | range(0, max_uintx) \ |
| 1658 | \ |
| 1659 | product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ |
| 1660 | "The minimum expansion of Metaspace (in bytes)") \ |
| 1661 | range(0, max_uintx) \ |
| 1662 | \ |
| 1663 | product(uintx, MaxMetaspaceFreeRatio, 70, \ |
| 1664 | "The maximum percentage of Metaspace free after GC to avoid " \ |
| 1665 | "shrinking") \ |
| 1666 | range(0, 100) \ |
| 1667 | constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ |
| 1668 | \ |
| 1669 | product(uintx, MinMetaspaceFreeRatio, 40, \ |
| 1670 | "The minimum percentage of Metaspace free after GC to avoid " \ |
| 1671 | "expansion") \ |
| 1672 | range(0, 99) \ |
| 1673 | constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ |
| 1674 | \ |
| 1675 | product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ |
| 1676 | "The maximum expansion of Metaspace without full GC (in bytes)") \ |
| 1677 | range(0, max_uintx) \ |
| 1678 | \ |
| 1679 | /* stack parameters */ \ |
| 1680 | product_pd(intx, StackYellowPages, \ |
| 1681 | "Number of yellow zone (recoverable overflows) pages of size " \ |
| 1682 | "4KB. If pages are bigger yellow zone is aligned up.") \ |
| 1683 | range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ |
| 1684 | \ |
| 1685 | product_pd(intx, StackRedPages, \ |
| 1686 | "Number of red zone (unrecoverable overflows) pages of size " \ |
| 1687 | "4KB. If pages are bigger red zone is aligned up.") \ |
| 1688 | range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ |
| 1689 | \ |
| 1690 | product_pd(intx, StackReservedPages, \ |
| 1691 | "Number of reserved zone (reserved to annotated methods) pages" \ |
| 1692 | " of size 4KB. If pages are bigger reserved zone is aligned up.") \ |
| 1693 | range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ |
| 1694 | \ |
| 1695 | product(bool, RestrictReservedStack, true, \ |
| 1696 | "Restrict @ReservedStackAccess to trusted classes") \ |
| 1697 | \ |
| 1698 | /* greater stack shadow pages can't generate instruction to bang stack */ \ |
| 1699 | product_pd(intx, StackShadowPages, \ |
| 1700 | "Number of shadow zone (for overflow checking) pages of size " \ |
| 1701 | "4KB. If pages are bigger shadow zone is aligned up. " \ |
| 1702 | "This should exceed the depth of the VM and native call stack.") \ |
| 1703 | range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ |
| 1704 | \ |
| 1705 | product_pd(intx, ThreadStackSize, \ |
| 1706 | "Thread Stack Size (in Kbytes)") \ |
| 1707 | range(0, 1 * M) \ |
| 1708 | \ |
| 1709 | product_pd(intx, VMThreadStackSize, \ |
| 1710 | "Non-Java Thread Stack Size (in Kbytes)") \ |
| 1711 | range(0, max_intx/(1 * K)) \ |
| 1712 | \ |
| 1713 | product_pd(intx, CompilerThreadStackSize, \ |
| 1714 | "Compiler Thread Stack Size (in Kbytes)") \ |
| 1715 | range(0, max_intx/(1 * K)) \ |
| 1716 | \ |
| 1717 | develop_pd(size_t, JVMInvokeMethodSlack, \ |
| 1718 | "Stack space (bytes) required for JVM_InvokeMethod to complete") \ |
| 1719 | \ |
| 1720 | /* code cache parameters */ \ |
| 1721 | develop_pd(uintx, CodeCacheSegmentSize, \ |
| 1722 | "Code cache segment size (in bytes) - smallest unit of " \ |
| 1723 | "allocation") \ |
| 1724 | range(1, 1024) \ |
| 1725 | constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ |
| 1726 | \ |
| 1727 | develop_pd(intx, CodeEntryAlignment, \ |
| 1728 | "Code entry alignment for generated code (in bytes)") \ |
| 1729 | constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ |
| 1730 | \ |
| 1731 | product_pd(intx, OptoLoopAlignment, \ |
| 1732 | "Align inner loops to zero relative to this modulus") \ |
| 1733 | range(1, 16) \ |
| 1734 | constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ |
| 1735 | \ |
| 1736 | product_pd(uintx, InitialCodeCacheSize, \ |
| 1737 | "Initial code cache size (in bytes)") \ |
| 1738 | range(os::vm_page_size(), max_uintx) \ |
| 1739 | \ |
| 1740 | develop_pd(uintx, CodeCacheMinimumUseSpace, \ |
| 1741 | "Minimum code cache size (in bytes) required to start VM.") \ |
| 1742 | range(0, max_uintx) \ |
| 1743 | \ |
| 1744 | product(bool, SegmentedCodeCache, false, \ |
| 1745 | "Use a segmented code cache") \ |
| 1746 | \ |
| 1747 | product_pd(uintx, ReservedCodeCacheSize, \ |
| 1748 | "Reserved code cache size (in bytes) - maximum code cache size") \ |
| 1749 | range(os::vm_page_size(), max_uintx) \ |
| 1750 | \ |
| 1751 | product_pd(uintx, NonProfiledCodeHeapSize, \ |
| 1752 | "Size of code heap with non-profiled methods (in bytes)") \ |
| 1753 | range(0, max_uintx) \ |
| 1754 | \ |
| 1755 | product_pd(uintx, ProfiledCodeHeapSize, \ |
| 1756 | "Size of code heap with profiled methods (in bytes)") \ |
| 1757 | range(0, max_uintx) \ |
| 1758 | \ |
| 1759 | product_pd(uintx, NonNMethodCodeHeapSize, \ |
| 1760 | "Size of code heap with non-nmethods (in bytes)") \ |
| 1761 | range(os::vm_page_size(), max_uintx) \ |
| 1762 | \ |
| 1763 | product_pd(uintx, CodeCacheExpansionSize, \ |
| 1764 | "Code cache expansion size (in bytes)") \ |
| 1765 | range(32*K, max_uintx) \ |
| 1766 | \ |
| 1767 | diagnostic_pd(uintx, CodeCacheMinBlockLength, \ |
| 1768 | "Minimum number of segments in a code cache block") \ |
| 1769 | range(1, 100) \ |
| 1770 | \ |
| 1771 | notproduct(bool, ExitOnFullCodeCache, false, \ |
| 1772 | "Exit the VM if we fill the code cache") \ |
| 1773 | \ |
| 1774 | product(bool, UseCodeCacheFlushing, true, \ |
| 1775 | "Remove cold/old nmethods from the code cache") \ |
| 1776 | \ |
| 1777 | product(uintx, StartAggressiveSweepingAt, 10, \ |
| 1778 | "Start aggressive sweeping if X[%] of the code cache is free." \ |
| 1779 | "Segmented code cache: X[%] of the non-profiled heap." \ |
| 1780 | "Non-segmented code cache: X[%] of the total code cache") \ |
| 1781 | range(0, 100) \ |
| 1782 | \ |
| 1783 | /* AOT parameters */ \ |
| 1784 | product(bool, UseAOT, AOT_ONLY(true) NOT_AOT(false), \ |
| 1785 | "Use AOT compiled files") \ |
| 1786 | \ |
| 1787 | product(ccstrlist, AOTLibrary, NULL, \ |
| 1788 | "AOT library") \ |
| 1789 | \ |
| 1790 | product(bool, PrintAOT, false, \ |
| 1791 | "Print used AOT klasses and methods") \ |
| 1792 | \ |
| 1793 | notproduct(bool, PrintAOTStatistics, false, \ |
| 1794 | "Print AOT statistics") \ |
| 1795 | \ |
| 1796 | diagnostic(bool, UseAOTStrictLoading, false, \ |
| 1797 | "Exit the VM if any of the AOT libraries has invalid config") \ |
| 1798 | \ |
| 1799 | product(bool, CalculateClassFingerprint, false, \ |
| 1800 | "Calculate class fingerprint") \ |
| 1801 | \ |
| 1802 | /* interpreter debugging */ \ |
| 1803 | develop(intx, BinarySwitchThreshold, 5, \ |
| 1804 | "Minimal number of lookupswitch entries for rewriting to binary " \ |
| 1805 | "switch") \ |
| 1806 | \ |
| 1807 | develop(intx, StopInterpreterAt, 0, \ |
| 1808 | "Stop interpreter execution at specified bytecode number") \ |
| 1809 | \ |
| 1810 | develop(intx, TraceBytecodesAt, 0, \ |
| 1811 | "Trace bytecodes starting with specified bytecode number") \ |
| 1812 | \ |
| 1813 | /* compiler interface */ \ |
| 1814 | develop(intx, CIStart, 0, \ |
| 1815 | "The id of the first compilation to permit") \ |
| 1816 | \ |
| 1817 | develop(intx, CIStop, max_jint, \ |
| 1818 | "The id of the last compilation to permit") \ |
| 1819 | \ |
| 1820 | develop(intx, CIStartOSR, 0, \ |
| 1821 | "The id of the first osr compilation to permit " \ |
| 1822 | "(CICountOSR must be on)") \ |
| 1823 | \ |
| 1824 | develop(intx, CIStopOSR, max_jint, \ |
| 1825 | "The id of the last osr compilation to permit " \ |
| 1826 | "(CICountOSR must be on)") \ |
| 1827 | \ |
| 1828 | develop(intx, CIBreakAtOSR, -1, \ |
| 1829 | "The id of osr compilation to break at") \ |
| 1830 | \ |
| 1831 | develop(intx, CIBreakAt, -1, \ |
| 1832 | "The id of compilation to break at") \ |
| 1833 | \ |
| 1834 | product(ccstrlist, CompileOnly, "", \ |
| 1835 | "List of methods (pkg/class.name) to restrict compilation to") \ |
| 1836 | \ |
| 1837 | product(ccstr, CompileCommandFile, NULL, \ |
| 1838 | "Read compiler commands from this file [.hotspot_compiler]") \ |
| 1839 | \ |
| 1840 | diagnostic(ccstr, CompilerDirectivesFile, NULL, \ |
| 1841 | "Read compiler directives from this file") \ |
| 1842 | \ |
| 1843 | product(ccstrlist, CompileCommand, "", \ |
| 1844 | "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ |
| 1845 | \ |
| 1846 | develop(bool, ReplayCompiles, false, \ |
| 1847 | "Enable replay of compilations from ReplayDataFile") \ |
| 1848 | \ |
| 1849 | product(ccstr, ReplayDataFile, NULL, \ |
| 1850 | "File containing compilation replay information" \ |
| 1851 | "[default: ./replay_pid%p.log] (%p replaced with pid)") \ |
| 1852 | \ |
| 1853 | product(ccstr, InlineDataFile, NULL, \ |
| 1854 | "File containing inlining replay information" \ |
| 1855 | "[default: ./inline_pid%p.log] (%p replaced with pid)") \ |
| 1856 | \ |
| 1857 | develop(intx, ReplaySuppressInitializers, 2, \ |
| 1858 | "Control handling of class initialization during replay: " \ |
| 1859 | "0 - don't do anything special; " \ |
| 1860 | "1 - treat all class initializers as empty; " \ |
| 1861 | "2 - treat class initializers for application classes as empty; " \ |
| 1862 | "3 - allow all class initializers to run during bootstrap but " \ |
| 1863 | " pretend they are empty after starting replay") \ |
| 1864 | range(0, 3) \ |
| 1865 | \ |
| 1866 | develop(bool, ReplayIgnoreInitErrors, false, \ |
| 1867 | "Ignore exceptions thrown during initialization for replay") \ |
| 1868 | \ |
| 1869 | product(bool, DumpReplayDataOnError, true, \ |
| 1870 | "Record replay data for crashing compiler threads") \ |
| 1871 | \ |
| 1872 | product(bool, CICompilerCountPerCPU, false, \ |
| 1873 | "1 compiler thread for log(N CPUs)") \ |
| 1874 | \ |
| 1875 | notproduct(intx, CICrashAt, -1, \ |
| 1876 | "id of compilation to trigger assert in compiler thread for " \ |
| 1877 | "the purpose of testing, e.g. generation of replay data") \ |
| 1878 | notproduct(bool, CIObjectFactoryVerify, false, \ |
| 1879 | "enable potentially expensive verification in ciObjectFactory") \ |
| 1880 | \ |
| 1881 | diagnostic(bool, AbortVMOnCompilationFailure, false, \ |
| 1882 | "Abort VM when method had failed to compile.") \ |
| 1883 | \ |
| 1884 | /* Priorities */ \ |
| 1885 | product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ |
| 1886 | \ |
| 1887 | product(intx, ThreadPriorityPolicy, 0, \ |
| 1888 | "0 : Normal. "\ |
| 1889 | " VM chooses priorities that are appropriate for normal "\ |
| 1890 | " applications. On Solaris NORM_PRIORITY and above are mapped "\ |
| 1891 | " to normal native priority. Java priorities below " \ |
| 1892 | " NORM_PRIORITY map to lower native priority values. On "\ |
| 1893 | " Windows applications are allowed to use higher native "\ |
| 1894 | " priorities. However, with ThreadPriorityPolicy=0, VM will "\ |
| 1895 | " not use the highest possible native priority, "\ |
| 1896 | " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ |
| 1897 | " system threads. On Linux thread priorities are ignored "\ |
| 1898 | " because the OS does not support static priority in "\ |
| 1899 | " SCHED_OTHER scheduling class which is the only choice for "\ |
| 1900 | " non-root, non-realtime applications. "\ |
| 1901 | "1 : Aggressive. "\ |
| 1902 | " Java thread priorities map over to the entire range of "\ |
| 1903 | " native thread priorities. Higher Java thread priorities map "\ |
| 1904 | " to higher native thread priorities. This policy should be "\ |
| 1905 | " used with care, as sometimes it can cause performance "\ |
| 1906 | " degradation in the application and/or the entire system. On "\ |
| 1907 | " Linux/BSD/macOS this policy requires root privilege or an "\ |
| 1908 | " extended capability.") \ |
| 1909 | range(0, 1) \ |
| 1910 | \ |
| 1911 | product(bool, ThreadPriorityVerbose, false, \ |
| 1912 | "Print priority changes") \ |
| 1913 | \ |
| 1914 | product(intx, CompilerThreadPriority, -1, \ |
| 1915 | "The native priority at which compiler threads should run " \ |
| 1916 | "(-1 means no change)") \ |
| 1917 | range(min_jint, max_jint) \ |
| 1918 | constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ |
| 1919 | \ |
| 1920 | product(intx, VMThreadPriority, -1, \ |
| 1921 | "The native priority at which the VM thread should run " \ |
| 1922 | "(-1 means no change)") \ |
| 1923 | range(-1, 127) \ |
| 1924 | \ |
| 1925 | product(intx, JavaPriority1_To_OSPriority, -1, \ |
| 1926 | "Map Java priorities to OS priorities") \ |
| 1927 | range(-1, 127) \ |
| 1928 | \ |
| 1929 | product(intx, JavaPriority2_To_OSPriority, -1, \ |
| 1930 | "Map Java priorities to OS priorities") \ |
| 1931 | range(-1, 127) \ |
| 1932 | \ |
| 1933 | product(intx, JavaPriority3_To_OSPriority, -1, \ |
| 1934 | "Map Java priorities to OS priorities") \ |
| 1935 | range(-1, 127) \ |
| 1936 | \ |
| 1937 | product(intx, JavaPriority4_To_OSPriority, -1, \ |
| 1938 | "Map Java priorities to OS priorities") \ |
| 1939 | range(-1, 127) \ |
| 1940 | \ |
| 1941 | product(intx, JavaPriority5_To_OSPriority, -1, \ |
| 1942 | "Map Java priorities to OS priorities") \ |
| 1943 | range(-1, 127) \ |
| 1944 | \ |
| 1945 | product(intx, JavaPriority6_To_OSPriority, -1, \ |
| 1946 | "Map Java priorities to OS priorities") \ |
| 1947 | range(-1, 127) \ |
| 1948 | \ |
| 1949 | product(intx, JavaPriority7_To_OSPriority, -1, \ |
| 1950 | "Map Java priorities to OS priorities") \ |
| 1951 | range(-1, 127) \ |
| 1952 | \ |
| 1953 | product(intx, JavaPriority8_To_OSPriority, -1, \ |
| 1954 | "Map Java priorities to OS priorities") \ |
| 1955 | range(-1, 127) \ |
| 1956 | \ |
| 1957 | product(intx, JavaPriority9_To_OSPriority, -1, \ |
| 1958 | "Map Java priorities to OS priorities") \ |
| 1959 | range(-1, 127) \ |
| 1960 | \ |
| 1961 | product(intx, JavaPriority10_To_OSPriority,-1, \ |
| 1962 | "Map Java priorities to OS priorities") \ |
| 1963 | range(-1, 127) \ |
| 1964 | \ |
| 1965 | experimental(bool, UseCriticalJavaThreadPriority, false, \ |
| 1966 | "Java thread priority 10 maps to critical scheduling priority") \ |
| 1967 | \ |
| 1968 | experimental(bool, UseCriticalCompilerThreadPriority, false, \ |
| 1969 | "Compiler thread(s) run at critical scheduling priority") \ |
| 1970 | \ |
| 1971 | experimental(bool, UseCriticalCMSThreadPriority, false, \ |
| 1972 | "ConcurrentMarkSweep thread runs at critical scheduling priority")\ |
| 1973 | \ |
| 1974 | develop(intx, NewCodeParameter, 0, \ |
| 1975 | "Testing Only: Create a dedicated integer parameter before " \ |
| 1976 | "putback") \ |
| 1977 | \ |
| 1978 | /* new oopmap storage allocation */ \ |
| 1979 | develop(intx, MinOopMapAllocation, 8, \ |
| 1980 | "Minimum number of OopMap entries in an OopMapSet") \ |
| 1981 | \ |
| 1982 | /* Background Compilation */ \ |
| 1983 | develop(intx, LongCompileThreshold, 50, \ |
| 1984 | "Used with +TraceLongCompiles") \ |
| 1985 | \ |
| 1986 | /* recompilation */ \ |
| 1987 | product_pd(intx, CompileThreshold, \ |
| 1988 | "number of interpreted method invocations before (re-)compiling") \ |
| 1989 | constraint(CompileThresholdConstraintFunc, AfterErgo) \ |
| 1990 | \ |
| 1991 | product(double, CompileThresholdScaling, 1.0, \ |
| 1992 | "Factor to control when first compilation happens " \ |
| 1993 | "(both with and without tiered compilation): " \ |
| 1994 | "values greater than 1.0 delay counter overflow, " \ |
| 1995 | "values between 0 and 1.0 rush counter overflow, " \ |
| 1996 | "value of 1.0 leaves compilation thresholds unchanged " \ |
| 1997 | "value of 0.0 is equivalent to -Xint. " \ |
| 1998 | "" \ |
| 1999 | "Flag can be set as per-method option. " \ |
| 2000 | "If a value is specified for a method, compilation thresholds " \ |
| 2001 | "for that method are scaled by both the value of the global flag "\ |
| 2002 | "and the value of the per-method flag.") \ |
| 2003 | range(0.0, DBL_MAX) \ |
| 2004 | \ |
| 2005 | product(intx, Tier0InvokeNotifyFreqLog, 7, \ |
| 2006 | "Interpreter (tier 0) invocation notification frequency") \ |
| 2007 | range(0, 30) \ |
| 2008 | \ |
| 2009 | product(intx, Tier2InvokeNotifyFreqLog, 11, \ |
| 2010 | "C1 without MDO (tier 2) invocation notification frequency") \ |
| 2011 | range(0, 30) \ |
| 2012 | \ |
| 2013 | product(intx, Tier3InvokeNotifyFreqLog, 10, \ |
| 2014 | "C1 with MDO profiling (tier 3) invocation notification " \ |
| 2015 | "frequency") \ |
| 2016 | range(0, 30) \ |
| 2017 | \ |
| 2018 | product(intx, Tier23InlineeNotifyFreqLog, 20, \ |
| 2019 | "Inlinee invocation (tiers 2 and 3) notification frequency") \ |
| 2020 | range(0, 30) \ |
| 2021 | \ |
| 2022 | product(intx, Tier0BackedgeNotifyFreqLog, 10, \ |
| 2023 | "Interpreter (tier 0) invocation notification frequency") \ |
| 2024 | range(0, 30) \ |
| 2025 | \ |
| 2026 | product(intx, Tier2BackedgeNotifyFreqLog, 14, \ |
| 2027 | "C1 without MDO (tier 2) invocation notification frequency") \ |
| 2028 | range(0, 30) \ |
| 2029 | \ |
| 2030 | product(intx, Tier3BackedgeNotifyFreqLog, 13, \ |
| 2031 | "C1 with MDO profiling (tier 3) invocation notification " \ |
| 2032 | "frequency") \ |
| 2033 | range(0, 30) \ |
| 2034 | \ |
| 2035 | product(intx, Tier2CompileThreshold, 0, \ |
| 2036 | "threshold at which tier 2 compilation is invoked") \ |
| 2037 | range(0, max_jint) \ |
| 2038 | \ |
| 2039 | product(intx, Tier2BackEdgeThreshold, 0, \ |
| 2040 | "Back edge threshold at which tier 2 compilation is invoked") \ |
| 2041 | range(0, max_jint) \ |
| 2042 | \ |
| 2043 | product(intx, Tier3InvocationThreshold, 200, \ |
| 2044 | "Compile if number of method invocations crosses this " \ |
| 2045 | "threshold") \ |
| 2046 | range(0, max_jint) \ |
| 2047 | \ |
| 2048 | product(intx, Tier3MinInvocationThreshold, 100, \ |
| 2049 | "Minimum invocation to compile at tier 3") \ |
| 2050 | range(0, max_jint) \ |
| 2051 | \ |
| 2052 | product(intx, Tier3CompileThreshold, 2000, \ |
| 2053 | "Threshold at which tier 3 compilation is invoked (invocation " \ |
| 2054 | "minimum must be satisfied)") \ |
| 2055 | range(0, max_jint) \ |
| 2056 | \ |
| 2057 | product(intx, Tier3BackEdgeThreshold, 60000, \ |
| 2058 | "Back edge threshold at which tier 3 OSR compilation is invoked") \ |
| 2059 | range(0, max_jint) \ |
| 2060 | \ |
| 2061 | product(intx, Tier3AOTInvocationThreshold, 10000, \ |
| 2062 | "Compile if number of method invocations crosses this " \ |
| 2063 | "threshold if coming from AOT") \ |
| 2064 | range(0, max_jint) \ |
| 2065 | \ |
| 2066 | product(intx, Tier3AOTMinInvocationThreshold, 1000, \ |
| 2067 | "Minimum invocation to compile at tier 3 if coming from AOT") \ |
| 2068 | range(0, max_jint) \ |
| 2069 | \ |
| 2070 | product(intx, Tier3AOTCompileThreshold, 15000, \ |
| 2071 | "Threshold at which tier 3 compilation is invoked (invocation " \ |
| 2072 | "minimum must be satisfied) if coming from AOT") \ |
| 2073 | range(0, max_jint) \ |
| 2074 | \ |
| 2075 | product(intx, Tier3AOTBackEdgeThreshold, 120000, \ |
| 2076 | "Back edge threshold at which tier 3 OSR compilation is invoked " \ |
| 2077 | "if coming from AOT") \ |
| 2078 | range(0, max_jint) \ |
| 2079 | \ |
| 2080 | product(intx, Tier4InvocationThreshold, 5000, \ |
| 2081 | "Compile if number of method invocations crosses this " \ |
| 2082 | "threshold") \ |
| 2083 | range(0, max_jint) \ |
| 2084 | \ |
| 2085 | product(intx, Tier4MinInvocationThreshold, 600, \ |
| 2086 | "Minimum invocation to compile at tier 4") \ |
| 2087 | range(0, max_jint) \ |
| 2088 | \ |
| 2089 | product(intx, Tier4CompileThreshold, 15000, \ |
| 2090 | "Threshold at which tier 4 compilation is invoked (invocation " \ |
| 2091 | "minimum must be satisfied") \ |
| 2092 | range(0, max_jint) \ |
| 2093 | \ |
| 2094 | product(intx, Tier4BackEdgeThreshold, 40000, \ |
| 2095 | "Back edge threshold at which tier 4 OSR compilation is invoked") \ |
| 2096 | range(0, max_jint) \ |
| 2097 | \ |
| 2098 | product(intx, Tier3DelayOn, 5, \ |
| 2099 | "If C2 queue size grows over this amount per compiler thread " \ |
| 2100 | "stop compiling at tier 3 and start compiling at tier 2") \ |
| 2101 | range(0, max_jint) \ |
| 2102 | \ |
| 2103 | product(intx, Tier3DelayOff, 2, \ |
| 2104 | "If C2 queue size is less than this amount per compiler thread " \ |
| 2105 | "allow methods compiled at tier 2 transition to tier 3") \ |
| 2106 | range(0, max_jint) \ |
| 2107 | \ |
| 2108 | product(intx, Tier3LoadFeedback, 5, \ |
| 2109 | "Tier 3 thresholds will increase twofold when C1 queue size " \ |
| 2110 | "reaches this amount per compiler thread") \ |
| 2111 | range(0, max_jint) \ |
| 2112 | \ |
| 2113 | product(intx, Tier4LoadFeedback, 3, \ |
| 2114 | "Tier 4 thresholds will increase twofold when C2 queue size " \ |
| 2115 | "reaches this amount per compiler thread") \ |
| 2116 | range(0, max_jint) \ |
| 2117 | \ |
| 2118 | product(intx, TieredCompileTaskTimeout, 50, \ |
| 2119 | "Kill compile task if method was not used within " \ |
| 2120 | "given timeout in milliseconds") \ |
| 2121 | range(0, max_intx) \ |
| 2122 | \ |
| 2123 | product(intx, TieredStopAtLevel, 4, \ |
| 2124 | "Stop at given compilation level") \ |
| 2125 | range(0, 4) \ |
| 2126 | \ |
| 2127 | product(intx, Tier0ProfilingStartPercentage, 200, \ |
| 2128 | "Start profiling in interpreter if the counters exceed tier 3 " \ |
| 2129 | "thresholds by the specified percentage") \ |
| 2130 | range(0, max_jint) \ |
| 2131 | \ |
| 2132 | product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ |
| 2133 | "Increase the compile threshold for C1 compilation if the code " \ |
| 2134 | "cache is filled by the specified percentage") \ |
| 2135 | range(0, 99) \ |
| 2136 | \ |
| 2137 | product(intx, TieredRateUpdateMinTime, 1, \ |
| 2138 | "Minimum rate sampling interval (in milliseconds)") \ |
| 2139 | range(0, max_intx) \ |
| 2140 | \ |
| 2141 | product(intx, TieredRateUpdateMaxTime, 25, \ |
| 2142 | "Maximum rate sampling interval (in milliseconds)") \ |
| 2143 | range(0, max_intx) \ |
| 2144 | \ |
| 2145 | product_pd(bool, TieredCompilation, \ |
| 2146 | "Enable tiered compilation") \ |
| 2147 | \ |
| 2148 | product(bool, PrintTieredEvents, false, \ |
| 2149 | "Print tiered events notifications") \ |
| 2150 | \ |
| 2151 | product_pd(intx, OnStackReplacePercentage, \ |
| 2152 | "NON_TIERED number of method invocations/branches (expressed as " \ |
| 2153 | "% of CompileThreshold) before (re-)compiling OSR code") \ |
| 2154 | constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ |
| 2155 | \ |
| 2156 | product(intx, InterpreterProfilePercentage, 33, \ |
| 2157 | "NON_TIERED number of method invocations/branches (expressed as " \ |
| 2158 | "% of CompileThreshold) before profiling in the interpreter") \ |
| 2159 | range(0, 100) \ |
| 2160 | \ |
| 2161 | develop(intx, MaxRecompilationSearchLength, 10, \ |
| 2162 | "The maximum number of frames to inspect when searching for " \ |
| 2163 | "recompilee") \ |
| 2164 | \ |
| 2165 | develop(intx, MaxInterpretedSearchLength, 3, \ |
| 2166 | "The maximum number of interpreted frames to skip when searching "\ |
| 2167 | "for recompilee") \ |
| 2168 | \ |
| 2169 | develop(intx, DesiredMethodLimit, 8000, \ |
| 2170 | "The desired maximum method size (in bytecodes) after inlining") \ |
| 2171 | \ |
| 2172 | develop(intx, HugeMethodLimit, 8000, \ |
| 2173 | "Don't compile methods larger than this if " \ |
| 2174 | "+DontCompileHugeMethods") \ |
| 2175 | \ |
| 2176 | /* Properties for Java libraries */ \ |
| 2177 | \ |
| 2178 | product(uint64_t, MaxDirectMemorySize, 0, \ |
| 2179 | "Maximum total size of NIO direct-buffer allocations") \ |
| 2180 | range(0, max_jlong) \ |
| 2181 | \ |
| 2182 | /* Flags used for temporary code during development */ \ |
| 2183 | \ |
| 2184 | diagnostic(bool, UseNewCode, false, \ |
| 2185 | "Testing Only: Use the new version while testing") \ |
| 2186 | \ |
| 2187 | diagnostic(bool, UseNewCode2, false, \ |
| 2188 | "Testing Only: Use the new version while testing") \ |
| 2189 | \ |
| 2190 | diagnostic(bool, UseNewCode3, false, \ |
| 2191 | "Testing Only: Use the new version while testing") \ |
| 2192 | \ |
| 2193 | /* flags for performance data collection */ \ |
| 2194 | \ |
| 2195 | product(bool, UsePerfData, true, \ |
| 2196 | "Flag to disable jvmstat instrumentation for performance testing "\ |
| 2197 | "and problem isolation purposes") \ |
| 2198 | \ |
| 2199 | product(bool, PerfDataSaveToFile, false, \ |
| 2200 | "Save PerfData memory to hsperfdata_<pid> file on exit") \ |
| 2201 | \ |
| 2202 | product(ccstr, PerfDataSaveFile, NULL, \ |
| 2203 | "Save PerfData memory to the specified absolute pathname. " \ |
| 2204 | "The string %p in the file name (if present) " \ |
| 2205 | "will be replaced by pid") \ |
| 2206 | \ |
| 2207 | product(intx, PerfDataSamplingInterval, 50, \ |
| 2208 | "Data sampling interval (in milliseconds)") \ |
| 2209 | range(PeriodicTask::min_interval, max_jint) \ |
| 2210 | constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ |
| 2211 | \ |
| 2212 | product(bool, PerfDisableSharedMem, false, \ |
| 2213 | "Store performance data in standard memory") \ |
| 2214 | \ |
| 2215 | product(intx, PerfDataMemorySize, 32*K, \ |
| 2216 | "Size of performance data memory region. Will be rounded " \ |
| 2217 | "up to a multiple of the native os page size.") \ |
| 2218 | range(128, 32*64*K) \ |
| 2219 | \ |
| 2220 | product(intx, PerfMaxStringConstLength, 1024, \ |
| 2221 | "Maximum PerfStringConstant string length before truncation") \ |
| 2222 | range(32, 32*K) \ |
| 2223 | \ |
| 2224 | product(bool, PerfAllowAtExitRegistration, false, \ |
| 2225 | "Allow registration of atexit() methods") \ |
| 2226 | \ |
| 2227 | product(bool, PerfBypassFileSystemCheck, false, \ |
| 2228 | "Bypass Win32 file system criteria checks (Windows Only)") \ |
| 2229 | \ |
| 2230 | product(intx, UnguardOnExecutionViolation, 0, \ |
| 2231 | "Unguard page and retry on no-execute fault (Win32 only) " \ |
| 2232 | "0=off, 1=conservative, 2=aggressive") \ |
| 2233 | range(0, 2) \ |
| 2234 | \ |
| 2235 | /* Serviceability Support */ \ |
| 2236 | \ |
| 2237 | product(bool, ManagementServer, false, \ |
| 2238 | "Create JMX Management Server") \ |
| 2239 | \ |
| 2240 | product(bool, DisableAttachMechanism, false, \ |
| 2241 | "Disable mechanism that allows tools to attach to this VM") \ |
| 2242 | \ |
| 2243 | product(bool, StartAttachListener, false, \ |
| 2244 | "Always start Attach Listener at VM startup") \ |
| 2245 | \ |
| 2246 | product(bool, EnableDynamicAgentLoading, true, \ |
| 2247 | "Allow tools to load agents with the attach mechanism") \ |
| 2248 | \ |
| 2249 | manageable(bool, PrintConcurrentLocks, false, \ |
| 2250 | "Print java.util.concurrent locks in thread dump") \ |
| 2251 | \ |
| 2252 | /* Shared spaces */ \ |
| 2253 | \ |
| 2254 | product(bool, UseSharedSpaces, true, \ |
| 2255 | "Use shared spaces for metadata") \ |
| 2256 | \ |
| 2257 | product(bool, VerifySharedSpaces, false, \ |
| 2258 | "Verify integrity of shared spaces") \ |
| 2259 | \ |
| 2260 | product(bool, RequireSharedSpaces, false, \ |
| 2261 | "Require shared spaces for metadata") \ |
| 2262 | \ |
| 2263 | product(bool, DumpSharedSpaces, false, \ |
| 2264 | "Special mode: JVM reads a class list, loads classes, builds " \ |
| 2265 | "shared spaces, and dumps the shared spaces to a file to be " \ |
| 2266 | "used in future JVM runs") \ |
| 2267 | \ |
| 2268 | product(bool, DynamicDumpSharedSpaces, false, \ |
| 2269 | "Dynamic archive") \ |
| 2270 | \ |
| 2271 | product(bool, PrintSharedArchiveAndExit, false, \ |
| 2272 | "Print shared archive file contents") \ |
| 2273 | \ |
| 2274 | product(bool, PrintSharedDictionary, false, \ |
| 2275 | "If PrintSharedArchiveAndExit is true, also print the shared " \ |
| 2276 | "dictionary") \ |
| 2277 | \ |
| 2278 | product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ |
| 2279 | NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ |
| 2280 | "Address to allocate shared memory region for class data") \ |
| 2281 | range(0, SIZE_MAX) \ |
| 2282 | \ |
| 2283 | product(ccstr, SharedArchiveConfigFile, NULL, \ |
| 2284 | "Data to add to the CDS archive file") \ |
| 2285 | \ |
| 2286 | product(uintx, SharedSymbolTableBucketSize, 4, \ |
| 2287 | "Average number of symbols per bucket in shared table") \ |
| 2288 | range(2, 246) \ |
| 2289 | \ |
| 2290 | diagnostic(bool, AllowArchivingWithJavaAgent, false, \ |
| 2291 | "Allow Java agent to be run with CDS dumping") \ |
| 2292 | \ |
| 2293 | diagnostic(bool, PrintMethodHandleStubs, false, \ |
| 2294 | "Print generated stub code for method handles") \ |
| 2295 | \ |
| 2296 | develop(bool, TraceMethodHandles, false, \ |
| 2297 | "trace internal method handle operations") \ |
| 2298 | \ |
| 2299 | diagnostic(bool, VerifyMethodHandles, trueInDebug, \ |
| 2300 | "perform extra checks when constructing method handles") \ |
| 2301 | \ |
| 2302 | diagnostic(bool, ShowHiddenFrames, false, \ |
| 2303 | "show method handle implementation frames (usually hidden)") \ |
| 2304 | \ |
| 2305 | experimental(bool, TrustFinalNonStaticFields, false, \ |
| 2306 | "trust final non-static declarations for constant folding") \ |
| 2307 | \ |
| 2308 | diagnostic(bool, FoldStableValues, true, \ |
| 2309 | "Optimize loads from stable fields (marked w/ @Stable)") \ |
| 2310 | \ |
| 2311 | develop(bool, TraceInvokeDynamic, false, \ |
| 2312 | "trace internal invoke dynamic operations") \ |
| 2313 | \ |
| 2314 | diagnostic(int, UseBootstrapCallInfo, 1, \ |
| 2315 | "0: when resolving InDy or ConDy, force all BSM arguments to be " \ |
| 2316 | "resolved before the bootstrap method is called; 1: when a BSM " \ |
| 2317 | "that may accept a BootstrapCallInfo is detected, use that API " \ |
| 2318 | "to pass BSM arguments, which allows the BSM to delay their " \ |
| 2319 | "resolution; 2+: stress test the BCI API by calling more BSMs " \ |
| 2320 | "via that API, instead of with the eagerly-resolved array.") \ |
| 2321 | \ |
| 2322 | diagnostic(bool, PauseAtStartup, false, \ |
| 2323 | "Causes the VM to pause at startup time and wait for the pause " \ |
| 2324 | "file to be removed (default: ./vm.paused.<pid>)") \ |
| 2325 | \ |
| 2326 | diagnostic(ccstr, PauseAtStartupFile, NULL, \ |
| 2327 | "The file to create and for whose removal to await when pausing " \ |
| 2328 | "at startup. (default: ./vm.paused.<pid>)") \ |
| 2329 | \ |
| 2330 | diagnostic(bool, PauseAtExit, false, \ |
| 2331 | "Pause and wait for keypress on exit if a debugger is attached") \ |
| 2332 | \ |
| 2333 | product(bool, ExtendedDTraceProbes, false, \ |
| 2334 | "Enable performance-impacting dtrace probes") \ |
| 2335 | \ |
| 2336 | product(bool, DTraceMethodProbes, false, \ |
| 2337 | "Enable dtrace probes for method-entry and method-exit") \ |
| 2338 | \ |
| 2339 | product(bool, DTraceAllocProbes, false, \ |
| 2340 | "Enable dtrace probes for object allocation") \ |
| 2341 | \ |
| 2342 | product(bool, DTraceMonitorProbes, false, \ |
| 2343 | "Enable dtrace probes for monitor events") \ |
| 2344 | \ |
| 2345 | product(bool, RelaxAccessControlCheck, false, \ |
| 2346 | "Relax the access control checks in the verifier") \ |
| 2347 | \ |
| 2348 | product(uintx, StringTableSize, defaultStringTableSize, \ |
| 2349 | "Number of buckets in the interned String table " \ |
| 2350 | "(will be rounded to nearest higher power of 2)") \ |
| 2351 | range(minimumStringTableSize, 16777216ul) \ |
| 2352 | \ |
| 2353 | experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ |
| 2354 | "Number of buckets in the JVM internal Symbol table") \ |
| 2355 | range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ |
| 2356 | \ |
| 2357 | product(bool, UseStringDeduplication, false, \ |
| 2358 | "Use string deduplication") \ |
| 2359 | \ |
| 2360 | product(uintx, StringDeduplicationAgeThreshold, 3, \ |
| 2361 | "A string must reach this age (or be promoted to an old region) " \ |
| 2362 | "to be considered for deduplication") \ |
| 2363 | range(1, markOopDesc::max_age) \ |
| 2364 | \ |
| 2365 | diagnostic(bool, StringDeduplicationResizeALot, false, \ |
| 2366 | "Force table resize every time the table is scanned") \ |
| 2367 | \ |
| 2368 | diagnostic(bool, StringDeduplicationRehashALot, false, \ |
| 2369 | "Force table rehash every time the table is scanned") \ |
| 2370 | \ |
| 2371 | diagnostic(bool, WhiteBoxAPI, false, \ |
| 2372 | "Enable internal testing APIs") \ |
| 2373 | \ |
| 2374 | experimental(intx, SurvivorAlignmentInBytes, 0, \ |
| 2375 | "Default survivor space alignment in bytes") \ |
| 2376 | constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ |
| 2377 | \ |
| 2378 | product(ccstr, DumpLoadedClassList, NULL, \ |
| 2379 | "Dump the names all loaded classes, that could be stored into " \ |
| 2380 | "the CDS archive, in the specified file") \ |
| 2381 | \ |
| 2382 | product(ccstr, SharedClassListFile, NULL, \ |
| 2383 | "Override the default CDS class list") \ |
| 2384 | \ |
| 2385 | product(ccstr, SharedArchiveFile, NULL, \ |
| 2386 | "Override the default location of the CDS archive file") \ |
| 2387 | \ |
| 2388 | product(ccstr, ArchiveClassesAtExit, NULL, \ |
| 2389 | "The path and name of the dynamic archive file") \ |
| 2390 | \ |
| 2391 | product(ccstr, ExtraSharedClassListFile, NULL, \ |
| 2392 | "Extra classlist for building the CDS archive file") \ |
| 2393 | \ |
| 2394 | experimental(size_t, ArrayAllocatorMallocLimit, \ |
| 2395 | SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ |
| 2396 | "Allocation less than this value will be allocated " \ |
| 2397 | "using malloc. Larger allocations will use mmap.") \ |
| 2398 | \ |
| 2399 | experimental(bool, AlwaysAtomicAccesses, false, \ |
| 2400 | "Accesses to all variables should always be atomic") \ |
| 2401 | \ |
| 2402 | diagnostic(bool, UseUnalignedAccesses, false, \ |
| 2403 | "Use unaligned memory accesses in Unsafe") \ |
| 2404 | \ |
| 2405 | product_pd(bool, PreserveFramePointer, \ |
| 2406 | "Use the FP register for holding the frame pointer " \ |
| 2407 | "and not as a general purpose register.") \ |
| 2408 | \ |
| 2409 | diagnostic(bool, CheckIntrinsics, true, \ |
| 2410 | "When a class C is loaded, check that " \ |
| 2411 | "(1) all intrinsics defined by the VM for class C are present "\ |
| 2412 | "in the loaded class file and are marked with the " \ |
| 2413 | "@HotSpotIntrinsicCandidate annotation, that " \ |
| 2414 | "(2) there is an intrinsic registered for all loaded methods " \ |
| 2415 | "that are annotated with the @HotSpotIntrinsicCandidate " \ |
| 2416 | "annotation, and that " \ |
| 2417 | "(3) no orphan methods exist for class C (i.e., methods for " \ |
| 2418 | "which the VM declares an intrinsic but that are not declared "\ |
| 2419 | "in the loaded class C. " \ |
| 2420 | "Check (3) is available only in debug builds.") \ |
| 2421 | \ |
| 2422 | diagnostic_pd(intx, InitArrayShortSize, \ |
| 2423 | "Threshold small size (in bytes) for clearing arrays. " \ |
| 2424 | "Anything this size or smaller may get converted to discrete " \ |
| 2425 | "scalar stores.") \ |
| 2426 | range(0, max_intx) \ |
| 2427 | constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ |
| 2428 | \ |
| 2429 | diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ |
| 2430 | "Disable backwards compatibility for compile commands.") \ |
| 2431 | \ |
| 2432 | diagnostic(bool, CompilerDirectivesPrint, false, \ |
| 2433 | "Print compiler directives on installation.") \ |
| 2434 | diagnostic(int, CompilerDirectivesLimit, 50, \ |
| 2435 | "Limit on number of compiler directives.") \ |
| 2436 | \ |
| 2437 | product(ccstr, AllocateHeapAt, NULL, \ |
| 2438 | "Path to the directoy where a temporary file will be created " \ |
| 2439 | "to use as the backing store for Java Heap.") \ |
| 2440 | \ |
| 2441 | experimental(ccstr, AllocateOldGenAt, NULL, \ |
| 2442 | "Path to the directoy where a temporary file will be " \ |
| 2443 | "created to use as the backing store for old generation." \ |
| 2444 | "File of size Xmx is pre-allocated for performance reason, so" \ |
| 2445 | "we need that much space available") \ |
| 2446 | \ |
| 2447 | develop(int, VerifyMetaspaceInterval, DEBUG_ONLY(500) NOT_DEBUG(0), \ |
| 2448 | "Run periodic metaspace verifications (0 - none, " \ |
| 2449 | "1 - always, >1 every nth interval)") \ |
| 2450 | \ |
| 2451 | diagnostic(bool, ShowRegistersOnAssert, true, \ |
| 2452 | "On internal errors, include registers in error report.") \ |
| 2453 | \ |
| 2454 | experimental(bool, UseSwitchProfiling, true, \ |
| 2455 | "leverage profiling for table/lookup switch") \ |
| 2456 | \ |
| 2457 | JFR_ONLY(product(bool, FlightRecorder, false, \ |
| 2458 | "(Deprecated) Enable Flight Recorder")) \ |
| 2459 | \ |
| 2460 | JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL, \ |
| 2461 | "Flight Recorder options")) \ |
| 2462 | \ |
| 2463 | JFR_ONLY(product(ccstr, StartFlightRecording, NULL, \ |
| 2464 | "Start flight recording with options")) \ |
| 2465 | \ |
| 2466 | experimental(bool, UseFastUnorderedTimeStamps, false, \ |
| 2467 | "Use platform unstable time where supported for timestamps only") |
| 2468 | |
| 2469 | // Interface macros |
| 2470 | #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; |
| 2471 | #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; |
| 2472 | #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; |
| 2473 | #define DECLARE_PD_DIAGNOSTIC_FLAG(type, name, doc) extern "C" type name; |
| 2474 | #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; |
| 2475 | #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; |
| 2476 | #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; |
| 2477 | #ifdef PRODUCT |
| 2478 | #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; |
| 2479 | #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; |
| 2480 | #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; |
| 2481 | #else |
| 2482 | #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; |
| 2483 | #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; |
| 2484 | #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; |
| 2485 | #endif // PRODUCT |
| 2486 | // Special LP64 flags, product only needed for now. |
| 2487 | #ifdef _LP64 |
| 2488 | #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; |
| 2489 | #else |
| 2490 | #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; |
| 2491 | #endif // _LP64 |
| 2492 | |
| 2493 | ALL_FLAGS(DECLARE_DEVELOPER_FLAG, \ |
| 2494 | DECLARE_PD_DEVELOPER_FLAG, \ |
| 2495 | DECLARE_PRODUCT_FLAG, \ |
| 2496 | DECLARE_PD_PRODUCT_FLAG, \ |
| 2497 | DECLARE_DIAGNOSTIC_FLAG, \ |
| 2498 | DECLARE_PD_DIAGNOSTIC_FLAG, \ |
| 2499 | DECLARE_EXPERIMENTAL_FLAG, \ |
| 2500 | DECLARE_NOTPRODUCT_FLAG, \ |
| 2501 | DECLARE_MANAGEABLE_FLAG, \ |
| 2502 | DECLARE_PRODUCT_RW_FLAG, \ |
| 2503 | DECLARE_LP64_PRODUCT_FLAG, \ |
| 2504 | IGNORE_RANGE, \ |
| 2505 | IGNORE_CONSTRAINT, \ |
| 2506 | IGNORE_WRITEABLE) |
| 2507 | |
| 2508 | // Extensions |
| 2509 | |
| 2510 | #include "runtime/globals_ext.hpp" |
| 2511 | |
| 2512 | #endif // SHARE_RUNTIME_GLOBALS_HPP |
| 2513 |
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