1 /* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26 #define SHARE_VM_RUNTIME_GLOBALS_HPP 27 28 #include "utilities/debug.hpp" 29 30 // use this for flags that are true per default in the tiered build 31 // but false in non-tiered builds, and vice versa 32 #ifdef TIERED 33 #define trueInTiered true 34 #define falseInTiered false 35 #else 36 #define trueInTiered false 37 #define falseInTiered true 38 #endif 39 40 #ifdef TARGET_ARCH_x86 41 # include "globals_x86.hpp" 42 #endif 43 #ifdef TARGET_ARCH_sparc 44 # include "globals_sparc.hpp" 45 #endif 46 #ifdef TARGET_ARCH_zero 47 # include "globals_zero.hpp" 48 #endif 49 #ifdef TARGET_ARCH_arm 50 # include "globals_arm.hpp" 51 #endif 52 #ifdef TARGET_ARCH_ppc 53 # include "globals_ppc.hpp" 54 #endif 55 #ifdef TARGET_OS_FAMILY_linux 56 # include "globals_linux.hpp" 57 #endif 58 #ifdef TARGET_OS_FAMILY_solaris 59 # include "globals_solaris.hpp" 60 #endif 61 #ifdef TARGET_OS_FAMILY_windows 62 # include "globals_windows.hpp" 63 #endif 64 #ifdef TARGET_OS_FAMILY_bsd 65 # include "globals_bsd.hpp" 66 #endif 67 #ifdef TARGET_OS_ARCH_linux_x86 68 # include "globals_linux_x86.hpp" 69 #endif 70 #ifdef TARGET_OS_ARCH_linux_sparc 71 # include "globals_linux_sparc.hpp" 72 #endif 73 #ifdef TARGET_OS_ARCH_linux_zero 74 # include "globals_linux_zero.hpp" 75 #endif 76 #ifdef TARGET_OS_ARCH_solaris_x86 77 # include "globals_solaris_x86.hpp" 78 #endif 79 #ifdef TARGET_OS_ARCH_solaris_sparc 80 # include "globals_solaris_sparc.hpp" 81 #endif 82 #ifdef TARGET_OS_ARCH_windows_x86 83 # include "globals_windows_x86.hpp" 84 #endif 85 #ifdef TARGET_OS_ARCH_linux_arm 86 # include "globals_linux_arm.hpp" 87 #endif 88 #ifdef TARGET_OS_ARCH_linux_ppc 89 # include "globals_linux_ppc.hpp" 90 #endif 91 #ifdef TARGET_OS_ARCH_bsd_x86 92 # include "globals_bsd_x86.hpp" 93 #endif 94 #ifdef TARGET_OS_ARCH_bsd_zero 95 # include "globals_bsd_zero.hpp" 96 #endif 97 #ifdef COMPILER1 98 #ifdef TARGET_ARCH_x86 99 # include "c1_globals_x86.hpp" 100 #endif 101 #ifdef TARGET_ARCH_sparc 102 # include "c1_globals_sparc.hpp" 103 #endif 104 #ifdef TARGET_ARCH_arm 105 # include "c1_globals_arm.hpp" 106 #endif 107 #ifdef TARGET_ARCH_ppc 108 # include "c1_globals_ppc.hpp" 109 #endif 110 #ifdef TARGET_OS_FAMILY_linux 111 # include "c1_globals_linux.hpp" 112 #endif 113 #ifdef TARGET_OS_FAMILY_solaris 114 # include "c1_globals_solaris.hpp" 115 #endif 116 #ifdef TARGET_OS_FAMILY_windows 117 # include "c1_globals_windows.hpp" 118 #endif 119 #ifdef TARGET_OS_FAMILY_bsd 120 # include "c1_globals_bsd.hpp" 121 #endif 122 #endif 123 #ifdef COMPILER2 124 #ifdef TARGET_ARCH_x86 125 # include "c2_globals_x86.hpp" 126 #endif 127 #ifdef TARGET_ARCH_sparc 128 # include "c2_globals_sparc.hpp" 129 #endif 130 #ifdef TARGET_ARCH_arm 131 # include "c2_globals_arm.hpp" 132 #endif 133 #ifdef TARGET_OS_FAMILY_linux 134 # include "c2_globals_linux.hpp" 135 #endif 136 #ifdef TARGET_OS_FAMILY_solaris 137 # include "c2_globals_solaris.hpp" 138 #endif 139 #ifdef TARGET_OS_FAMILY_windows 140 # include "c2_globals_windows.hpp" 141 #endif 142 #ifdef TARGET_OS_FAMILY_bsd 143 # include "c2_globals_bsd.hpp" 144 #endif 145 #endif 146 #ifdef SHARK 147 #ifdef TARGET_ARCH_zero 148 # include "shark_globals_zero.hpp" 149 #endif 150 #endif 151 152 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 153 define_pd_global(bool, BackgroundCompilation, false); 154 define_pd_global(bool, UseTLAB, false); 155 define_pd_global(bool, CICompileOSR, false); 156 define_pd_global(bool, UseTypeProfile, false); 157 define_pd_global(bool, UseOnStackReplacement, false); 158 define_pd_global(bool, InlineIntrinsics, false); 159 define_pd_global(bool, PreferInterpreterNativeStubs, true); 160 define_pd_global(bool, ProfileInterpreter, false); 161 define_pd_global(bool, ProfileTraps, false); 162 define_pd_global(bool, TieredCompilation, false); 163 164 define_pd_global(intx, CompileThreshold, 0); 165 define_pd_global(intx, BackEdgeThreshold, 0); 166 167 define_pd_global(intx, OnStackReplacePercentage, 0); 168 define_pd_global(bool, ResizeTLAB, false); 169 define_pd_global(intx, FreqInlineSize, 0); 170 define_pd_global(intx, InlineSmallCode, 0); 171 define_pd_global(intx, NewSizeThreadIncrease, 4*K); 172 define_pd_global(intx, InlineClassNatives, true); 173 define_pd_global(intx, InlineUnsafeOps, true); 174 define_pd_global(intx, InitialCodeCacheSize, 160*K); 175 define_pd_global(intx, ReservedCodeCacheSize, 32*M); 176 define_pd_global(intx, CodeCacheExpansionSize, 32*K); 177 define_pd_global(intx, CodeCacheMinBlockLength, 1); 178 define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 179 define_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M)); 180 define_pd_global(bool, NeverActAsServerClassMachine, true); 181 define_pd_global(uint64_t,MaxRAM, 1ULL*G); 182 #define CI_COMPILER_COUNT 0 183 #else 184 185 #ifdef COMPILER2 186 #define CI_COMPILER_COUNT 2 187 #else 188 #define CI_COMPILER_COUNT 1 189 #endif // COMPILER2 190 191 #endif // no compilers 192 193 // string type aliases used only in this file 194 typedef const char* ccstr; 195 typedef const char* ccstrlist; // represents string arguments which accumulate 196 197 enum FlagValueOrigin { 198 DEFAULT = 0, 199 COMMAND_LINE = 1, 200 ENVIRON_VAR = 2, 201 CONFIG_FILE = 3, 202 MANAGEMENT = 4, 203 ERGONOMIC = 5, 204 ATTACH_ON_DEMAND = 6, 205 INTERNAL = 99 206 }; 207 208 struct Flag { 209 const char *type; 210 const char *name; 211 void* addr; 212 213 NOT_PRODUCT(const char *doc;) 214 215 const char *kind; 216 FlagValueOrigin origin; 217 218 // points to all Flags static array 219 static Flag *flags; 220 221 // number of flags 222 static size_t numFlags; 223 224 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false); 225 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 226 227 bool is_bool() const { return strcmp(type, "bool") == 0; } 228 bool get_bool() const { return *((bool*) addr); } 229 void set_bool(bool value) { *((bool*) addr) = value; } 230 231 bool is_intx() const { return strcmp(type, "intx") == 0; } 232 intx get_intx() const { return *((intx*) addr); } 233 void set_intx(intx value) { *((intx*) addr) = value; } 234 235 bool is_uintx() const { return strcmp(type, "uintx") == 0; } 236 uintx get_uintx() const { return *((uintx*) addr); } 237 void set_uintx(uintx value) { *((uintx*) addr) = value; } 238 239 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 240 uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 241 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 242 243 bool is_double() const { return strcmp(type, "double") == 0; } 244 double get_double() const { return *((double*) addr); } 245 void set_double(double value) { *((double*) addr) = value; } 246 247 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 248 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 249 ccstr get_ccstr() const { return *((ccstr*) addr); } 250 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 251 252 bool is_unlocker() const; 253 bool is_unlocked() const; 254 bool is_writeable() const; 255 bool is_external() const; 256 257 bool is_unlocker_ext() const; 258 bool is_unlocked_ext() const; 259 bool is_writeable_ext() const; 260 bool is_external_ext() const; 261 262 void get_locked_message(char*, int) const; 263 void get_locked_message_ext(char*, int) const; 264 265 void print_on(outputStream* st, bool withComments = false ); 266 void print_as_flag(outputStream* st); 267 }; 268 269 // debug flags control various aspects of the VM and are global accessible 270 271 // use FlagSetting to temporarily change some debug flag 272 // e.g. FlagSetting fs(DebugThisAndThat, true); 273 // restored to previous value upon leaving scope 274 class FlagSetting { 275 bool val; 276 bool* flag; 277 public: 278 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 279 ~FlagSetting() { *flag = val; } 280 }; 281 282 283 class CounterSetting { 284 intx* counter; 285 public: 286 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 287 ~CounterSetting() { (*counter)--; } 288 }; 289 290 291 class UIntFlagSetting { 292 uintx val; 293 uintx* flag; 294 public: 295 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 296 ~UIntFlagSetting() { *flag = val; } 297 }; 298 299 300 class DoubleFlagSetting { 301 double val; 302 double* flag; 303 public: 304 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 305 ~DoubleFlagSetting() { *flag = val; } 306 }; 307 308 309 class CommandLineFlags { 310 public: 311 static bool boolAt(char* name, size_t len, bool* value); 312 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 313 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 314 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 315 316 static bool intxAt(char* name, size_t len, intx* value); 317 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 318 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 319 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 320 321 static bool uintxAt(char* name, size_t len, uintx* value); 322 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 323 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 324 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 325 326 static bool uint64_tAt(char* name, size_t len, uint64_t* value); 327 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 328 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); 329 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 330 331 static bool doubleAt(char* name, size_t len, double* value); 332 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 333 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 334 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 335 336 static bool ccstrAt(char* name, size_t len, ccstr* value); 337 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 338 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 339 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 340 341 // Returns false if name is not a command line flag. 342 static bool wasSetOnCmdline(const char* name, bool* value); 343 static void printSetFlags(outputStream* out); 344 345 static void printFlags(outputStream* out, bool withComments); 346 347 static void verify() PRODUCT_RETURN; 348 }; 349 350 // use this for flags that are true by default in the debug version but 351 // false in the optimized version, and vice versa 352 #ifdef ASSERT 353 #define trueInDebug true 354 #define falseInDebug false 355 #else 356 #define trueInDebug false 357 #define falseInDebug true 358 #endif 359 360 // use this for flags that are true per default in the product build 361 // but false in development builds, and vice versa 362 #ifdef PRODUCT 363 #define trueInProduct true 364 #define falseInProduct false 365 #else 366 #define trueInProduct false 367 #define falseInProduct true 368 #endif 369 370 #ifdef JAVASE_EMBEDDED 371 #define falseInEmbedded false 372 #else 373 #define falseInEmbedded true 374 #endif 375 376 // develop flags are settable / visible only during development and are constant in the PRODUCT version 377 // product flags are always settable / visible 378 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 379 380 // A flag must be declared with one of the following types: 381 // bool, intx, uintx, ccstr. 382 // The type "ccstr" is an alias for "const char*" and is used 383 // only in this file, because the macrology requires single-token type names. 384 385 // Note: Diagnostic options not meant for VM tuning or for product modes. 386 // They are to be used for VM quality assurance or field diagnosis 387 // of VM bugs. They are hidden so that users will not be encouraged to 388 // try them as if they were VM ordinary execution options. However, they 389 // are available in the product version of the VM. Under instruction 390 // from support engineers, VM customers can turn them on to collect 391 // diagnostic information about VM problems. To use a VM diagnostic 392 // option, you must first specify +UnlockDiagnosticVMOptions. 393 // (This master switch also affects the behavior of -Xprintflags.) 394 // 395 // experimental flags are in support of features that are not 396 // part of the officially supported product, but are available 397 // for experimenting with. They could, for example, be performance 398 // features that may not have undergone full or rigorous QA, but which may 399 // help performance in some cases and released for experimentation 400 // by the community of users and developers. This flag also allows one to 401 // be able to build a fully supported product that nonetheless also 402 // ships with some unsupported, lightly tested, experimental features. 403 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 404 // UnlockExperimentalVMOptions flag, which allows the control and 405 // modification of the experimental flags. 406 // 407 // Nota bene: neither diagnostic nor experimental options should be used casually, 408 // and they are not supported on production loads, except under explicit 409 // direction from support engineers. 410 // 411 // manageable flags are writeable external product flags. 412 // They are dynamically writeable through the JDK management interface 413 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 414 // These flags are external exported interface (see CCC). The list of 415 // manageable flags can be queried programmatically through the management 416 // interface. 417 // 418 // A flag can be made as "manageable" only if 419 // - the flag is defined in a CCC as an external exported interface. 420 // - the VM implementation supports dynamic setting of the flag. 421 // This implies that the VM must *always* query the flag variable 422 // and not reuse state related to the flag state at any given time. 423 // - you want the flag to be queried programmatically by the customers. 424 // 425 // product_rw flags are writeable internal product flags. 426 // They are like "manageable" flags but for internal/private use. 427 // The list of product_rw flags are internal/private flags which 428 // may be changed/removed in a future release. It can be set 429 // through the management interface to get/set value 430 // when the name of flag is supplied. 431 // 432 // A flag can be made as "product_rw" only if 433 // - the VM implementation supports dynamic setting of the flag. 434 // This implies that the VM must *always* query the flag variable 435 // and not reuse state related to the flag state at any given time. 436 // 437 // Note that when there is a need to support develop flags to be writeable, 438 // it can be done in the same way as product_rw. 439 440 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 441 \ 442 lp64_product(bool, UseCompressedOops, false, \ 443 "Use 32-bit object references in 64-bit VM " \ 444 "lp64_product means flag is always constant in 32 bit VM") \ 445 \ 446 lp64_product(bool, UseCompressedKlassPointers, false, \ 447 "Use 32-bit klass pointers in 64-bit VM " \ 448 "lp64_product means flag is always constant in 32 bit VM") \ 449 \ 450 notproduct(bool, CheckCompressedOops, true, \ 451 "generate checks in encoding/decoding code in debug VM") \ 452 \ 453 product_pd(uintx, HeapBaseMinAddress, \ 454 "OS specific low limit for heap base address") \ 455 \ 456 diagnostic(bool, PrintCompressedOopsMode, false, \ 457 "Print compressed oops base address and encoding mode") \ 458 \ 459 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 460 "Default object alignment in bytes, 8 is minimum") \ 461 \ 462 product(bool, AssumeMP, false, \ 463 "Instruct the VM to assume multiple processors are available") \ 464 \ 465 /* UseMembar is theoretically a temp flag used for memory barrier \ 466 * removal testing. It was supposed to be removed before FCS but has \ 467 * been re-added (see 6401008) */ \ 468 product_pd(bool, UseMembar, \ 469 "(Unstable) Issues membars on thread state transitions") \ 470 \ 471 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 472 * that don't support it. This will be replaced by processor detection \ 473 * logic. \ 474 */ \ 475 product(bool, UsePPCLWSYNC, true, \ 476 "Use lwsync instruction if true, else use slower sync") \ 477 \ 478 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 479 "Whether to clean the chunk pool asynchronously") \ 480 \ 481 /* Temporary: See 6948537 */ \ 482 experimental(bool, UseMemSetInBOT, true, \ 483 "(Unstable) uses memset in BOT updates in GC code") \ 484 \ 485 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 486 "Enable normal processing of flags relating to field diagnostics")\ 487 \ 488 experimental(bool, UnlockExperimentalVMOptions, false, \ 489 "Enable normal processing of flags relating to experimental features")\ 490 \ 491 product(bool, JavaMonitorsInStackTrace, true, \ 492 "Print info. about Java monitor locks when the stacks are dumped")\ 493 \ 494 product_pd(bool, UseLargePages, \ 495 "Use large page memory") \ 496 \ 497 product_pd(bool, UseLargePagesIndividualAllocation, \ 498 "Allocate large pages individually for better affinity") \ 499 \ 500 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 501 "Fail large pages individual allocation") \ 502 \ 503 develop(bool, TracePageSizes, false, \ 504 "Trace page size selection and usage.") \ 505 \ 506 product(bool, UseNUMA, false, \ 507 "Use NUMA if available") \ 508 \ 509 product(bool, UseNUMAInterleaving, false, \ 510 "Interleave memory across NUMA nodes if available") \ 511 \ 512 product(uintx, NUMAInterleaveGranularity, 2*M, \ 513 "Granularity to use for NUMA interleaving on Windows OS") \ 514 \ 515 product(bool, ForceNUMA, false, \ 516 "Force NUMA optimizations on single-node/UMA systems") \ 517 \ 518 product(uintx, NUMAChunkResizeWeight, 20, \ 519 "Percentage (0-100) used to weigh the current sample when " \ 520 "computing exponentially decaying average for " \ 521 "AdaptiveNUMAChunkSizing") \ 522 \ 523 product(uintx, NUMASpaceResizeRate, 1*G, \ 524 "Do not reallocate more that this amount per collection") \ 525 \ 526 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 527 "Enable adaptive chunk sizing for NUMA") \ 528 \ 529 product(bool, NUMAStats, false, \ 530 "Print NUMA stats in detailed heap information") \ 531 \ 532 product(uintx, NUMAPageScanRate, 256, \ 533 "Maximum number of pages to include in the page scan procedure") \ 534 \ 535 product_pd(bool, NeedsDeoptSuspend, \ 536 "True for register window machines (sparc/ia64)") \ 537 \ 538 product(intx, UseSSE, 99, \ 539 "Highest supported SSE instructions set on x86/x64") \ 540 \ 541 product(bool, UseAES, false, \ 542 "Control whether AES instructions can be used on x86/x64") \ 543 \ 544 product(uintx, LargePageSizeInBytes, 0, \ 545 "Large page size (0 to let VM choose the page size") \ 546 \ 547 product(uintx, LargePageHeapSizeThreshold, 128*M, \ 548 "Use large pages if max heap is at least this big") \ 549 \ 550 product(bool, ForceTimeHighResolution, false, \ 551 "Using high time resolution(For Win32 only)") \ 552 \ 553 develop(bool, TraceItables, false, \ 554 "Trace initialization and use of itables") \ 555 \ 556 develop(bool, TracePcPatching, false, \ 557 "Trace usage of frame::patch_pc") \ 558 \ 559 develop(bool, TraceJumps, false, \ 560 "Trace assembly jumps in thread ring buffer") \ 561 \ 562 develop(bool, TraceRelocator, false, \ 563 "Trace the bytecode relocator") \ 564 \ 565 develop(bool, TraceLongCompiles, false, \ 566 "Print out every time compilation is longer than " \ 567 "a given threashold") \ 568 \ 569 develop(bool, SafepointALot, false, \ 570 "Generates a lot of safepoints. Works with " \ 571 "GuaranteedSafepointInterval") \ 572 \ 573 product_pd(bool, BackgroundCompilation, \ 574 "A thread requesting compilation is not blocked during " \ 575 "compilation") \ 576 \ 577 product(bool, PrintVMQWaitTime, false, \ 578 "Prints out the waiting time in VM operation queue") \ 579 \ 580 develop(bool, NoYieldsInMicrolock, false, \ 581 "Disable yields in microlock") \ 582 \ 583 develop(bool, TraceOopMapGeneration, false, \ 584 "Shows oopmap generation") \ 585 \ 586 product(bool, MethodFlushing, true, \ 587 "Reclamation of zombie and not-entrant methods") \ 588 \ 589 develop(bool, VerifyStack, false, \ 590 "Verify stack of each thread when it is entering a runtime call") \ 591 \ 592 diagnostic(bool, ForceUnreachable, false, \ 593 "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \ 594 \ 595 notproduct(bool, StressDerivedPointers, false, \ 596 "Force scavenge when a derived pointers is detected on stack " \ 597 "after rtm call") \ 598 \ 599 develop(bool, TraceDerivedPointers, false, \ 600 "Trace traversal of derived pointers on stack") \ 601 \ 602 notproduct(bool, TraceCodeBlobStacks, false, \ 603 "Trace stack-walk of codeblobs") \ 604 \ 605 product(bool, PrintJNIResolving, false, \ 606 "Used to implement -v:jni") \ 607 \ 608 notproduct(bool, PrintRewrites, false, \ 609 "Print methods that are being rewritten") \ 610 \ 611 product(bool, UseInlineCaches, true, \ 612 "Use Inline Caches for virtual calls ") \ 613 \ 614 develop(bool, InlineArrayCopy, true, \ 615 "inline arraycopy native that is known to be part of " \ 616 "base library DLL") \ 617 \ 618 develop(bool, InlineObjectHash, true, \ 619 "inline Object::hashCode() native that is known to be part " \ 620 "of base library DLL") \ 621 \ 622 develop(bool, InlineNatives, true, \ 623 "inline natives that are known to be part of base library DLL") \ 624 \ 625 develop(bool, InlineMathNatives, true, \ 626 "inline SinD, CosD, etc.") \ 627 \ 628 develop(bool, InlineClassNatives, true, \ 629 "inline Class.isInstance, etc") \ 630 \ 631 develop(bool, InlineThreadNatives, true, \ 632 "inline Thread.currentThread, etc") \ 633 \ 634 develop(bool, InlineUnsafeOps, true, \ 635 "inline memory ops (native methods) from sun.misc.Unsafe") \ 636 \ 637 product(bool, CriticalJNINatives, true, \ 638 "check for critical JNI entry points") \ 639 \ 640 notproduct(bool, StressCriticalJNINatives, false, \ 641 "Exercise register saving code in critical natives") \ 642 \ 643 product(bool, UseSSE42Intrinsics, false, \ 644 "SSE4.2 versions of intrinsics") \ 645 \ 646 product(bool, UseAESIntrinsics, false, \ 647 "use intrinsics for AES versions of crypto") \ 648 \ 649 product(bool, UseCRC32Intrinsics, false, \ 650 "use intrinsics for java.util.zip.CRC32") \ 651 \ 652 develop(bool, TraceCallFixup, false, \ 653 "traces all call fixups") \ 654 \ 655 develop(bool, DeoptimizeALot, false, \ 656 "deoptimize at every exit from the runtime system") \ 657 \ 658 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 659 "a comma separated list of bcis to deoptimize at") \ 660 \ 661 product(bool, DeoptimizeRandom, false, \ 662 "deoptimize random frames on random exit from the runtime system")\ 663 \ 664 notproduct(bool, ZombieALot, false, \ 665 "creates zombies (non-entrant) at exit from the runt. system") \ 666 \ 667 product(bool, UnlinkSymbolsALot, false, \ 668 "unlink unreferenced symbols from the symbol table at safepoints")\ 669 \ 670 notproduct(bool, WalkStackALot, false, \ 671 "trace stack (no print) at every exit from the runtime system") \ 672 \ 673 product(bool, Debugging, false, \ 674 "set when executing debug methods in debug.ccp " \ 675 "(to prevent triggering assertions)") \ 676 \ 677 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 678 "Enable strict checks that safepoints cannot happen for threads " \ 679 "that used No_Safepoint_Verifier") \ 680 \ 681 notproduct(bool, VerifyLastFrame, false, \ 682 "Verify oops on last frame on entry to VM") \ 683 \ 684 develop(bool, TraceHandleAllocation, false, \ 685 "Prints out warnings when suspicious many handles are allocated") \ 686 \ 687 product(bool, UseCompilerSafepoints, true, \ 688 "Stop at safepoints in compiled code") \ 689 \ 690 product(bool, FailOverToOldVerifier, true, \ 691 "fail over to old verifier when split verifier fails") \ 692 \ 693 develop(bool, ShowSafepointMsgs, false, \ 694 "Show msg. about safepoint synch.") \ 695 \ 696 product(bool, SafepointTimeout, false, \ 697 "Time out and warn or fail after SafepointTimeoutDelay " \ 698 "milliseconds if failed to reach safepoint") \ 699 \ 700 develop(bool, DieOnSafepointTimeout, false, \ 701 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 702 \ 703 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 704 /* typically, at most a few retries are needed */ \ 705 product(intx, SuspendRetryCount, 50, \ 706 "Maximum retry count for an external suspend request") \ 707 \ 708 product(intx, SuspendRetryDelay, 5, \ 709 "Milliseconds to delay per retry (* current_retry_count)") \ 710 \ 711 product(bool, AssertOnSuspendWaitFailure, false, \ 712 "Assert/Guarantee on external suspend wait failure") \ 713 \ 714 product(bool, TraceSuspendWaitFailures, false, \ 715 "Trace external suspend wait failures") \ 716 \ 717 product(bool, MaxFDLimit, true, \ 718 "Bump the number of file descriptors to max in solaris.") \ 719 \ 720 diagnostic(bool, LogEvents, true, \ 721 "Enable the various ring buffer event logs") \ 722 \ 723 diagnostic(uintx, LogEventsBufferEntries, 10, \ 724 "Enable the various ring buffer event logs") \ 725 \ 726 product(bool, BytecodeVerificationRemote, true, \ 727 "Enables the Java bytecode verifier for remote classes") \ 728 \ 729 product(bool, BytecodeVerificationLocal, false, \ 730 "Enables the Java bytecode verifier for local classes") \ 731 \ 732 develop(bool, ForceFloatExceptions, trueInDebug, \ 733 "Force exceptions on FP stack under/overflow") \ 734 \ 735 develop(bool, VerifyStackAtCalls, false, \ 736 "Verify that the stack pointer is unchanged after calls") \ 737 \ 738 develop(bool, TraceJavaAssertions, false, \ 739 "Trace java language assertions") \ 740 \ 741 notproduct(bool, CheckAssertionStatusDirectives, false, \ 742 "temporary - see javaClasses.cpp") \ 743 \ 744 notproduct(bool, PrintMallocFree, false, \ 745 "Trace calls to C heap malloc/free allocation") \ 746 \ 747 product(bool, PrintOopAddress, false, \ 748 "Always print the location of the oop") \ 749 \ 750 notproduct(bool, VerifyCodeCacheOften, false, \ 751 "Verify compiled-code cache often") \ 752 \ 753 develop(bool, ZapDeadCompiledLocals, false, \ 754 "Zap dead locals in compiler frames") \ 755 \ 756 notproduct(bool, ZapDeadLocalsOld, false, \ 757 "Zap dead locals (old version, zaps all frames when " \ 758 "entering the VM") \ 759 \ 760 notproduct(bool, CheckOopishValues, false, \ 761 "Warn if value contains oop ( requires ZapDeadLocals)") \ 762 \ 763 develop(bool, UseMallocOnly, false, \ 764 "use only malloc/free for allocation (no resource area/arena)") \ 765 \ 766 develop(bool, PrintMalloc, false, \ 767 "print all malloc/free calls") \ 768 \ 769 develop(bool, PrintMallocStatistics, false, \ 770 "print malloc/free statistics") \ 771 \ 772 develop(bool, ZapResourceArea, trueInDebug, \ 773 "Zap freed resource/arena space with 0xABABABAB") \ 774 \ 775 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 776 "Zap freed VM handle space with 0xBCBCBCBC") \ 777 \ 778 develop(bool, ZapJNIHandleArea, trueInDebug, \ 779 "Zap freed JNI handle space with 0xFEFEFEFE") \ 780 \ 781 notproduct(bool, ZapStackSegments, trueInDebug, \ 782 "Zap allocated/freed Stack segments with 0xFADFADED") \ 783 \ 784 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 785 "Zap unused heap space with 0xBAADBABE") \ 786 \ 787 develop(bool, TraceZapUnusedHeapArea, false, \ 788 "Trace zapping of unused heap space") \ 789 \ 790 develop(bool, CheckZapUnusedHeapArea, false, \ 791 "Check zapping of unused heap space") \ 792 \ 793 develop(bool, ZapFillerObjects, trueInDebug, \ 794 "Zap filler objects with 0xDEAFBABE") \ 795 \ 796 develop(bool, PrintVMMessages, true, \ 797 "Print vm messages on console") \ 798 \ 799 product(bool, PrintGCApplicationConcurrentTime, false, \ 800 "Print the time the application has been running") \ 801 \ 802 product(bool, PrintGCApplicationStoppedTime, false, \ 803 "Print the time the application has been stopped") \ 804 \ 805 diagnostic(bool, VerboseVerification, false, \ 806 "Display detailed verification details") \ 807 \ 808 notproduct(uintx, ErrorHandlerTest, 0, \ 809 "If > 0, provokes an error after VM initialization; the value" \ 810 "determines which error to provoke. See test_error_handler()" \ 811 "in debug.cpp.") \ 812 \ 813 develop(bool, Verbose, false, \ 814 "Prints additional debugging information from other modes") \ 815 \ 816 develop(bool, PrintMiscellaneous, false, \ 817 "Prints uncategorized debugging information (requires +Verbose)") \ 818 \ 819 develop(bool, WizardMode, false, \ 820 "Prints much more debugging information") \ 821 \ 822 product(bool, ShowMessageBoxOnError, false, \ 823 "Keep process alive on VM fatal error") \ 824 \ 825 product(bool, CreateMinidumpOnCrash, false, \ 826 "Create minidump on VM fatal error") \ 827 \ 828 product_pd(bool, UseOSErrorReporting, \ 829 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 830 \ 831 product(bool, SuppressFatalErrorMessage, false, \ 832 "Do NO Fatal Error report [Avoid deadlock]") \ 833 \ 834 product(ccstrlist, OnError, "", \ 835 "Run user-defined commands on fatal error; see VMError.cpp " \ 836 "for examples") \ 837 \ 838 product(ccstrlist, OnOutOfMemoryError, "", \ 839 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 840 \ 841 manageable(bool, HeapDumpBeforeFullGC, false, \ 842 "Dump heap to file before any major stop-world GC") \ 843 \ 844 manageable(bool, HeapDumpAfterFullGC, false, \ 845 "Dump heap to file after any major stop-world GC") \ 846 \ 847 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 848 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 849 \ 850 manageable(ccstr, HeapDumpPath, NULL, \ 851 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 852 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 853 "in the working directory)") \ 854 \ 855 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 856 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 857 "when the heap usage is larger than this") \ 858 \ 859 develop(uintx, HeapDumpSegmentSize, 1*G, \ 860 "Approximate segment size when generating a segmented heap dump") \ 861 \ 862 develop(bool, BreakAtWarning, false, \ 863 "Execute breakpoint upon encountering VM warning") \ 864 \ 865 develop(bool, TraceVMOperation, false, \ 866 "Trace vm operations") \ 867 \ 868 develop(bool, UseFakeTimers, false, \ 869 "Tells whether the VM should use system time or a fake timer") \ 870 \ 871 product(ccstr, NativeMemoryTracking, "off", \ 872 "Native memory tracking options") \ 873 \ 874 diagnostic(bool, PrintNMTStatistics, false, \ 875 "Print native memory tracking summary data if it is on") \ 876 \ 877 diagnostic(bool, AutoShutdownNMT, true, \ 878 "Automatically shutdown native memory tracking under stress " \ 879 "situation. When set to false, native memory tracking tries to " \ 880 "stay alive at the expense of JVM performance") \ 881 \ 882 diagnostic(bool, LogCompilation, false, \ 883 "Log compilation activity in detail to hotspot.log or LogFile") \ 884 \ 885 product(bool, PrintCompilation, false, \ 886 "Print compilations") \ 887 \ 888 diagnostic(bool, TraceNMethodInstalls, false, \ 889 "Trace nmethod intallation") \ 890 \ 891 diagnostic(intx, ScavengeRootsInCode, 2, \ 892 "0: do not allow scavengable oops in the code cache; " \ 893 "1: allow scavenging from the code cache; " \ 894 "2: emit as many constants as the compiler can see") \ 895 \ 896 product(bool, AlwaysRestoreFPU, false, \ 897 "Restore the FPU control word after every JNI call (expensive)") \ 898 \ 899 diagnostic(bool, PrintCompilation2, false, \ 900 "Print additional statistics per compilation") \ 901 \ 902 diagnostic(bool, PrintAdapterHandlers, false, \ 903 "Print code generated for i2c/c2i adapters") \ 904 \ 905 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 906 "Verify that i2c/c2i adapters are called properly") \ 907 \ 908 develop(bool, VerifyAdapterSharing, false, \ 909 "Verify that the code for shared adapters is the equivalent") \ 910 \ 911 diagnostic(bool, PrintAssembly, false, \ 912 "Print assembly code (using external disassembler.so)") \ 913 \ 914 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 915 "Options string passed to disassembler.so") \ 916 \ 917 diagnostic(bool, PrintNMethods, false, \ 918 "Print assembly code for nmethods when generated") \ 919 \ 920 diagnostic(bool, PrintNativeNMethods, false, \ 921 "Print assembly code for native nmethods when generated") \ 922 \ 923 develop(bool, PrintDebugInfo, false, \ 924 "Print debug information for all nmethods when generated") \ 925 \ 926 develop(bool, PrintRelocations, false, \ 927 "Print relocation information for all nmethods when generated") \ 928 \ 929 develop(bool, PrintDependencies, false, \ 930 "Print dependency information for all nmethods when generated") \ 931 \ 932 develop(bool, PrintExceptionHandlers, false, \ 933 "Print exception handler tables for all nmethods when generated") \ 934 \ 935 develop(bool, StressCompiledExceptionHandlers, false, \ 936 "Exercise compiled exception handlers") \ 937 \ 938 develop(bool, InterceptOSException, false, \ 939 "Starts debugger when an implicit OS (e.g., NULL) " \ 940 "exception happens") \ 941 \ 942 product(bool, PrintCodeCache, false, \ 943 "Print the code cache memory usage when exiting") \ 944 \ 945 develop(ccstr, PrintCodeCacheDetails, "off", \ 946 "Code cache printing options:" \ 947 "off: print no additional code cache information" \ 948 "on: print detailed code cache information when exiting" \ 949 "content: print nmethod size distribution and names when exiting" \ 950 "oop_map: print oop map usage when exiting" \ 951 "dep_check_time: print nmethod dependency checking information when exiting"\ 952 "trace: print code cache actions during execution" \ 953 "all: print all of the above") \ 954 \ 955 product(bool, PrintCodeCacheOnCompilation, false, \ 956 "Print the code cache memory usage each time a method is compiled") \ 957 \ 958 diagnostic(bool, PrintStubCode, false, \ 959 "Print generated stub code") \ 960 \ 961 product(bool, StackTraceInThrowable, true, \ 962 "Collect backtrace in throwable when exception happens") \ 963 \ 964 product(bool, OmitStackTraceInFastThrow, true, \ 965 "Omit backtraces for some 'hot' exceptions in optimized code") \ 966 \ 967 product(bool, ProfilerPrintByteCodeStatistics, false, \ 968 "Prints byte code statictics when dumping profiler output") \ 969 \ 970 product(bool, ProfilerRecordPC, false, \ 971 "Collects tick for each 16 byte interval of compiled code") \ 972 \ 973 product(bool, ProfileVM, false, \ 974 "Profiles ticks that fall within VM (either in the VM Thread " \ 975 "or VM code called through stubs)") \ 976 \ 977 product(bool, ProfileIntervals, false, \ 978 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 979 \ 980 notproduct(bool, ProfilerCheckIntervals, false, \ 981 "Collect and print info on spacing of profiler ticks") \ 982 \ 983 develop(bool, PrintJVMWarnings, false, \ 984 "Prints warnings for unimplemented JVM functions") \ 985 \ 986 product(bool, PrintWarnings, true, \ 987 "Prints JVM warnings to output stream") \ 988 \ 989 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 990 "Prints warnings for stalled SpinLocks") \ 991 \ 992 product(bool, RegisterFinalizersAtInit, true, \ 993 "Register finalizable objects at end of Object.<init> or " \ 994 "after allocation") \ 995 \ 996 develop(bool, RegisterReferences, true, \ 997 "Tells whether the VM should register soft/weak/final/phantom " \ 998 "references") \ 999 \ 1000 develop(bool, IgnoreRewrites, false, \ 1001 "Supress rewrites of bytecodes in the oopmap generator. " \ 1002 "This is unsafe!") \ 1003 \ 1004 develop(bool, PrintCodeCacheExtension, false, \ 1005 "Print extension of code cache") \ 1006 \ 1007 develop(bool, UsePrivilegedStack, true, \ 1008 "Enable the security JVM functions") \ 1009 \ 1010 develop(bool, ProtectionDomainVerification, true, \ 1011 "Verifies protection domain before resolution in system " \ 1012 "dictionary") \ 1013 \ 1014 product(bool, ClassUnloading, true, \ 1015 "Do unloading of classes") \ 1016 \ 1017 develop(bool, DisableStartThread, false, \ 1018 "Disable starting of additional Java threads " \ 1019 "(for debugging only)") \ 1020 \ 1021 develop(bool, MemProfiling, false, \ 1022 "Write memory usage profiling to log file") \ 1023 \ 1024 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1025 "Prints the system dictionary at exit") \ 1026 \ 1027 experimental(intx, PredictedLoadedClassCount, 0, \ 1028 "Experimental: Tune loaded class cache starting size.") \ 1029 \ 1030 diagnostic(bool, UnsyncloadClass, false, \ 1031 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1032 "class loader must call VM synchronized for findClass " \ 1033 "and defineClass.") \ 1034 \ 1035 product(bool, AlwaysLockClassLoader, false, \ 1036 "Require the VM to acquire the class loader lock before calling " \ 1037 "loadClass() even for class loaders registering " \ 1038 "as parallel capable") \ 1039 \ 1040 product(bool, AllowParallelDefineClass, false, \ 1041 "Allow parallel defineClass requests for class loaders " \ 1042 "registering as parallel capable") \ 1043 \ 1044 product(bool, MustCallLoadClassInternal, false, \ 1045 "Call loadClassInternal() rather than loadClass()") \ 1046 \ 1047 product_pd(bool, DontYieldALot, \ 1048 "Throw away obvious excess yield calls (for SOLARIS only)") \ 1049 \ 1050 product_pd(bool, ConvertSleepToYield, \ 1051 "Converts sleep(0) to thread yield " \ 1052 "(may be off for SOLARIS to improve GUI)") \ 1053 \ 1054 product(bool, ConvertYieldToSleep, false, \ 1055 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 1056 "behavior (SOLARIS only)") \ 1057 \ 1058 product(bool, UseBoundThreads, true, \ 1059 "Bind user level threads to kernel threads (for SOLARIS only)") \ 1060 \ 1061 develop(bool, UseDetachedThreads, true, \ 1062 "Use detached threads that are recycled upon termination " \ 1063 "(for SOLARIS only)") \ 1064 \ 1065 product(bool, UseLWPSynchronization, true, \ 1066 "Use LWP-based instead of libthread-based synchronization " \ 1067 "(SPARC only)") \ 1068 \ 1069 product(ccstr, SyncKnobs, NULL, \ 1070 "(Unstable) Various monitor synchronization tunables") \ 1071 \ 1072 product(intx, EmitSync, 0, \ 1073 "(Unsafe,Unstable) " \ 1074 " Controls emission of inline sync fast-path code") \ 1075 \ 1076 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1077 \ 1078 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1079 \ 1080 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 1081 \ 1082 product(intx, SyncVerbose, 0, "(Unstable)" ) \ 1083 \ 1084 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 1085 \ 1086 product(intx, hashCode, 5, \ 1087 "(Unstable) select hashCode generation algorithm" ) \ 1088 \ 1089 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1090 "(Unstable, Linux-specific)" \ 1091 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 1092 \ 1093 product(bool, FilterSpuriousWakeups, true, \ 1094 "Prevent spurious or premature wakeups from object.wait " \ 1095 "(Solaris only)") \ 1096 \ 1097 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 1098 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 1099 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 1100 \ 1101 develop(bool, UsePthreads, false, \ 1102 "Use pthread-based instead of libthread-based synchronization " \ 1103 "(SPARC only)") \ 1104 \ 1105 product(bool, AdjustConcurrency, false, \ 1106 "call thr_setconcurrency at thread create time to avoid " \ 1107 "LWP starvation on MP systems (For Solaris Only)") \ 1108 \ 1109 product(bool, ReduceSignalUsage, false, \ 1110 "Reduce the use of OS signals in Java and/or the VM") \ 1111 \ 1112 develop_pd(bool, ShareVtableStubs, \ 1113 "Share vtable stubs (smaller code but worse branch prediction") \ 1114 \ 1115 develop(bool, LoadLineNumberTables, true, \ 1116 "Tells whether the class file parser loads line number tables") \ 1117 \ 1118 develop(bool, LoadLocalVariableTables, true, \ 1119 "Tells whether the class file parser loads local variable tables")\ 1120 \ 1121 develop(bool, LoadLocalVariableTypeTables, true, \ 1122 "Tells whether the class file parser loads local variable type tables")\ 1123 \ 1124 product(bool, AllowUserSignalHandlers, false, \ 1125 "Do not complain if the application installs signal handlers " \ 1126 "(Solaris & Linux only)") \ 1127 \ 1128 product(bool, UseSignalChaining, true, \ 1129 "Use signal-chaining to invoke signal handlers installed " \ 1130 "by the application (Solaris & Linux only)") \ 1131 \ 1132 product(bool, UseAltSigs, false, \ 1133 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1134 "internal signals (Solaris only)") \ 1135 \ 1136 product(bool, AllowJNIEnvProxy, false, \ 1137 "Allow JNIEnv proxies for jdbx") \ 1138 \ 1139 product(bool, JNIDetachReleasesMonitors, true, \ 1140 "JNI DetachCurrentThread releases monitors owned by thread") \ 1141 \ 1142 product(bool, RestoreMXCSROnJNICalls, false, \ 1143 "Restore MXCSR when returning from JNI calls") \ 1144 \ 1145 product(bool, CheckJNICalls, false, \ 1146 "Verify all arguments to JNI calls") \ 1147 \ 1148 product(bool, UseFastJNIAccessors, true, \ 1149 "Use optimized versions of Get<Primitive>Field") \ 1150 \ 1151 product(bool, EagerXrunInit, false, \ 1152 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1153 " but not all -Xrun libraries may support the state of the VM at this time") \ 1154 \ 1155 product(bool, PreserveAllAnnotations, false, \ 1156 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 1157 \ 1158 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1159 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1160 \ 1161 product(bool, LazyBootClassLoader, true, \ 1162 "Enable/disable lazy opening of boot class path entries") \ 1163 \ 1164 product(bool, UseXMMForArrayCopy, false, \ 1165 "Use SSE2 MOVQ instruction for Arraycopy") \ 1166 \ 1167 product(intx, FieldsAllocationStyle, 1, \ 1168 "0 - type based with oops first, 1 - with oops last, " \ 1169 "2 - oops in super and sub classes are together") \ 1170 \ 1171 product(bool, CompactFields, true, \ 1172 "Allocate nonstatic fields in gaps between previous fields") \ 1173 \ 1174 notproduct(bool, PrintFieldLayout, false, \ 1175 "Print field layout for each class") \ 1176 \ 1177 product(intx, ContendedPaddingWidth, 128, \ 1178 "How many bytes to pad the fields/classes marked @Contended with")\ 1179 \ 1180 product(bool, EnableContended, true, \ 1181 "Enable @Contended annotation support") \ 1182 \ 1183 product(bool, RestrictContended, true, \ 1184 "Restrict @Contended to trusted classes") \ 1185 \ 1186 product(bool, UseBiasedLocking, true, \ 1187 "Enable biased locking in JVM") \ 1188 \ 1189 product(intx, BiasedLockingStartupDelay, 4000, \ 1190 "Number of milliseconds to wait before enabling biased locking") \ 1191 \ 1192 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1193 "Print statistics of biased locking in JVM") \ 1194 \ 1195 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1196 "Threshold of number of revocations per type to try to " \ 1197 "rebias all objects in the heap of that type") \ 1198 \ 1199 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1200 "Threshold of number of revocations per type to permanently " \ 1201 "revoke biases of all objects in the heap of that type") \ 1202 \ 1203 product(intx, BiasedLockingDecayTime, 25000, \ 1204 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1205 "type after previous bulk rebias") \ 1206 \ 1207 /* tracing */ \ 1208 \ 1209 notproduct(bool, TraceRuntimeCalls, false, \ 1210 "Trace run-time calls") \ 1211 \ 1212 develop(bool, TraceJNICalls, false, \ 1213 "Trace JNI calls") \ 1214 \ 1215 notproduct(bool, TraceJVMCalls, false, \ 1216 "Trace JVM calls") \ 1217 \ 1218 product(ccstr, TraceJVMTI, NULL, \ 1219 "Trace flags for JVMTI functions and events") \ 1220 \ 1221 /* This option can change an EMCP method into an obsolete method. */ \ 1222 /* This can affect tests that except specific methods to be EMCP. */ \ 1223 /* This option should be used with caution. */ \ 1224 product(bool, StressLdcRewrite, false, \ 1225 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1226 \ 1227 product(intx, TraceRedefineClasses, 0, \ 1228 "Trace level for JVMTI RedefineClasses") \ 1229 \ 1230 develop(bool, StressMethodComparator, false, \ 1231 "run the MethodComparator on all loaded methods") \ 1232 \ 1233 /* change to false by default sometime after Mustang */ \ 1234 product(bool, VerifyMergedCPBytecodes, true, \ 1235 "Verify bytecodes after RedefineClasses constant pool merging") \ 1236 \ 1237 develop(bool, TraceJNIHandleAllocation, false, \ 1238 "Trace allocation/deallocation of JNI handle blocks") \ 1239 \ 1240 develop(bool, TraceThreadEvents, false, \ 1241 "Trace all thread events") \ 1242 \ 1243 develop(bool, TraceBytecodes, false, \ 1244 "Trace bytecode execution") \ 1245 \ 1246 develop(bool, TraceClassInitialization, false, \ 1247 "Trace class initialization") \ 1248 \ 1249 develop(bool, TraceExceptions, false, \ 1250 "Trace exceptions") \ 1251 \ 1252 develop(bool, TraceICs, false, \ 1253 "Trace inline cache changes") \ 1254 \ 1255 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1256 "Trace method invocation counter overflow") \ 1257 \ 1258 develop(bool, TraceInlineCacheClearing, false, \ 1259 "Trace clearing of inline caches in nmethods") \ 1260 \ 1261 develop(bool, TraceDependencies, false, \ 1262 "Trace dependencies") \ 1263 \ 1264 develop(bool, VerifyDependencies, trueInDebug, \ 1265 "Exercise and verify the compilation dependency mechanism") \ 1266 \ 1267 develop(bool, TraceNewOopMapGeneration, false, \ 1268 "Trace OopMapGeneration") \ 1269 \ 1270 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1271 "Trace OopMapGeneration: print detailed cell states") \ 1272 \ 1273 develop(bool, TimeOopMap, false, \ 1274 "Time calls to GenerateOopMap::compute_map() in sum") \ 1275 \ 1276 develop(bool, TimeOopMap2, false, \ 1277 "Time calls to GenerateOopMap::compute_map() individually") \ 1278 \ 1279 develop(bool, TraceMonitorMismatch, false, \ 1280 "Trace monitor matching failures during OopMapGeneration") \ 1281 \ 1282 develop(bool, TraceOopMapRewrites, false, \ 1283 "Trace rewritting of method oops during oop map generation") \ 1284 \ 1285 develop(bool, TraceSafepoint, false, \ 1286 "Trace safepoint operations") \ 1287 \ 1288 develop(bool, TraceICBuffer, false, \ 1289 "Trace usage of IC buffer") \ 1290 \ 1291 develop(bool, TraceCompiledIC, false, \ 1292 "Trace changes of compiled IC") \ 1293 \ 1294 notproduct(bool, TraceZapDeadLocals, false, \ 1295 "Trace zapping dead locals") \ 1296 \ 1297 develop(bool, TraceStartupTime, false, \ 1298 "Trace setup time") \ 1299 \ 1300 develop(bool, TraceProtectionDomainVerification, false, \ 1301 "Trace protection domain verifcation") \ 1302 \ 1303 develop(bool, TraceClearedExceptions, false, \ 1304 "Prints when an exception is forcibly cleared") \ 1305 \ 1306 product(bool, TraceClassResolution, false, \ 1307 "Trace all constant pool resolutions (for debugging)") \ 1308 \ 1309 product(bool, TraceBiasedLocking, false, \ 1310 "Trace biased locking in JVM") \ 1311 \ 1312 product(bool, TraceMonitorInflation, false, \ 1313 "Trace monitor inflation in JVM") \ 1314 \ 1315 /* gc */ \ 1316 \ 1317 product(bool, UseSerialGC, false, \ 1318 "Use the serial garbage collector") \ 1319 \ 1320 product(bool, UseG1GC, false, \ 1321 "Use the Garbage-First garbage collector") \ 1322 \ 1323 product(bool, UseParallelGC, false, \ 1324 "Use the Parallel Scavenge garbage collector") \ 1325 \ 1326 product(bool, UseParallelOldGC, false, \ 1327 "Use the Parallel Old garbage collector") \ 1328 \ 1329 product(uintx, HeapMaximumCompactionInterval, 20, \ 1330 "How often should we maximally compact the heap (not allowing " \ 1331 "any dead space)") \ 1332 \ 1333 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1334 "The collection count for the first maximum compaction") \ 1335 \ 1336 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1337 "In the Parallel Old garbage collector maximum compaction for " \ 1338 "a system GC") \ 1339 \ 1340 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1341 "The mean used by the par compact dead wood" \ 1342 "limiter (a number between 0-100).") \ 1343 \ 1344 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1345 "The standard deviation used by the par compact dead wood" \ 1346 "limiter (a number between 0-100).") \ 1347 \ 1348 product(uintx, ParallelGCThreads, 0, \ 1349 "Number of parallel threads parallel gc will use") \ 1350 \ 1351 product(bool, UseDynamicNumberOfGCThreads, false, \ 1352 "Dynamically choose the number of parallel threads " \ 1353 "parallel gc will use") \ 1354 \ 1355 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1356 "Force dynamic selection of the number of" \ 1357 "parallel threads parallel gc will use to aid debugging") \ 1358 \ 1359 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1360 "Size of heap (bytes) per GC thread used in calculating the " \ 1361 "number of GC threads") \ 1362 \ 1363 product(bool, TraceDynamicGCThreads, false, \ 1364 "Trace the dynamic GC thread usage") \ 1365 \ 1366 develop(bool, ParallelOldGCSplitALot, false, \ 1367 "Provoke splitting (copying data from a young gen space to" \ 1368 "multiple destination spaces)") \ 1369 \ 1370 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1371 "How often to provoke splitting a young gen space") \ 1372 \ 1373 product(uintx, ConcGCThreads, 0, \ 1374 "Number of threads concurrent gc will use") \ 1375 \ 1376 product(uintx, YoungPLABSize, 4096, \ 1377 "Size of young gen promotion labs (in HeapWords)") \ 1378 \ 1379 product(uintx, OldPLABSize, 1024, \ 1380 "Size of old gen promotion labs (in HeapWords)") \ 1381 \ 1382 product(uintx, GCTaskTimeStampEntries, 200, \ 1383 "Number of time stamp entries per gc worker thread") \ 1384 \ 1385 product(bool, AlwaysTenure, false, \ 1386 "Always tenure objects in eden. (ParallelGC only)") \ 1387 \ 1388 product(bool, NeverTenure, false, \ 1389 "Never tenure objects in eden, May tenure on overflow " \ 1390 "(ParallelGC only)") \ 1391 \ 1392 product(bool, ScavengeBeforeFullGC, true, \ 1393 "Scavenge youngest generation before each full GC, " \ 1394 "used with UseParallelGC") \ 1395 \ 1396 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1397 "Allow scavenges to occur when to_space contains objects.") \ 1398 \ 1399 product(bool, UseConcMarkSweepGC, false, \ 1400 "Use Concurrent Mark-Sweep GC in the old generation") \ 1401 \ 1402 product(bool, ExplicitGCInvokesConcurrent, false, \ 1403 "A System.gc() request invokes a concurrent collection;" \ 1404 " (effective only when UseConcMarkSweepGC)") \ 1405 \ 1406 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1407 "A System.gc() request invokes a concurrent collection and " \ 1408 "also unloads classes during such a concurrent gc cycle " \ 1409 "(effective only when UseConcMarkSweepGC)") \ 1410 \ 1411 product(bool, GCLockerInvokesConcurrent, false, \ 1412 "The exit of a JNI CS necessitating a scavenge also" \ 1413 " kicks off a bkgrd concurrent collection") \ 1414 \ 1415 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1416 "How much the GC can expand the eden by while the GC locker " \ 1417 "is active (as a percentage)") \ 1418 \ 1419 diagnostic(intx, GCLockerRetryAllocationCount, 2, \ 1420 "Number of times to retry allocations when" \ 1421 " blocked by the GC locker") \ 1422 \ 1423 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1424 "Use Adaptive Free Lists in the CMS generation") \ 1425 \ 1426 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1427 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1428 \ 1429 develop(bool, RotateCMSCollectionTypes, false, \ 1430 "Rotate the CMS collections among concurrent and STW") \ 1431 \ 1432 product(bool, UseCMSBestFit, true, \ 1433 "Use CMS best fit allocation strategy") \ 1434 \ 1435 product(bool, UseCMSCollectionPassing, true, \ 1436 "Use passing of collection from background to foreground") \ 1437 \ 1438 product(bool, UseParNewGC, false, \ 1439 "Use parallel threads in the new generation.") \ 1440 \ 1441 product(bool, ParallelGCVerbose, false, \ 1442 "Verbose output for parallel GC.") \ 1443 \ 1444 product(uintx, ParallelGCBufferWastePct, 10, \ 1445 "Wasted fraction of parallel allocation buffer.") \ 1446 \ 1447 diagnostic(bool, ParallelGCRetainPLAB, false, \ 1448 "Retain parallel allocation buffers across scavenges; " \ 1449 " -- disabled because this currently conflicts with " \ 1450 " parallel card scanning under certain conditions ") \ 1451 \ 1452 product(uintx, TargetPLABWastePct, 10, \ 1453 "Target wasted space in last buffer as percent of overall " \ 1454 "allocation") \ 1455 \ 1456 product(uintx, PLABWeight, 75, \ 1457 "Percentage (0-100) used to weight the current sample when" \ 1458 "computing exponentially decaying average for ResizePLAB.") \ 1459 \ 1460 product(bool, ResizePLAB, true, \ 1461 "Dynamically resize (survivor space) promotion labs") \ 1462 \ 1463 product(bool, PrintPLAB, false, \ 1464 "Print (survivor space) promotion labs sizing decisions") \ 1465 \ 1466 product(intx, ParGCArrayScanChunk, 50, \ 1467 "Scan a subset and push remainder, if array is bigger than this") \ 1468 \ 1469 product(bool, ParGCUseLocalOverflow, false, \ 1470 "Instead of a global overflow list, use local overflow stacks") \ 1471 \ 1472 product(bool, ParGCTrimOverflow, true, \ 1473 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 1474 \ 1475 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1476 "Whether we should simulate work queue overflow in ParNew") \ 1477 \ 1478 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1479 "An `interval' counter that determines how frequently " \ 1480 "we simulate overflow; a smaller number increases frequency") \ 1481 \ 1482 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1483 "The desired number of objects to claim from the overflow list") \ 1484 \ 1485 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1486 "The number of strides per worker thread that we divide up the " \ 1487 "card table scanning work into") \ 1488 \ 1489 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1490 "The number of cards in each chunk of the parallel chunks used " \ 1491 "during card table scanning") \ 1492 \ 1493 product(uintx, CMSParPromoteBlocksToClaim, 16, \ 1494 "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1495 "parallel GC.") \ 1496 \ 1497 product(uintx, OldPLABWeight, 50, \ 1498 "Percentage (0-100) used to weight the current sample when" \ 1499 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ 1500 \ 1501 product(bool, ResizeOldPLAB, true, \ 1502 "Dynamically resize (old gen) promotion labs") \ 1503 \ 1504 product(bool, PrintOldPLAB, false, \ 1505 "Print (old gen) promotion labs sizing decisions") \ 1506 \ 1507 product(uintx, CMSOldPLABMin, 16, \ 1508 "Min size of CMS gen promotion lab caches per worker per blksize")\ 1509 \ 1510 product(uintx, CMSOldPLABMax, 1024, \ 1511 "Max size of CMS gen promotion lab caches per worker per blksize")\ 1512 \ 1513 product(uintx, CMSOldPLABNumRefills, 4, \ 1514 "Nominal number of refills of CMS gen promotion lab cache" \ 1515 " per worker per block size") \ 1516 \ 1517 product(bool, CMSOldPLABResizeQuicker, false, \ 1518 "Whether to react on-the-fly during a scavenge to a sudden" \ 1519 " change in block demand rate") \ 1520 \ 1521 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1522 "The tolerance of the phase-change detector for on-the-fly" \ 1523 " PLAB resizing during a scavenge") \ 1524 \ 1525 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1526 "The gain in the feedback loop for on-the-fly PLAB resizing" \ 1527 " during a scavenge") \ 1528 \ 1529 product(bool, AlwaysPreTouch, false, \ 1530 "It forces all freshly committed pages to be pre-touched.") \ 1531 \ 1532 product_pd(uintx, CMSYoungGenPerWorker, \ 1533 "The maximum size of young gen chosen by default per GC worker " \ 1534 "thread available") \ 1535 \ 1536 product(bool, CMSIncrementalMode, false, \ 1537 "Whether CMS GC should operate in \"incremental\" mode") \ 1538 \ 1539 product(uintx, CMSIncrementalDutyCycle, 10, \ 1540 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1541 "CMSIncrementalPacing is enabled, then this is just the initial" \ 1542 "value") \ 1543 \ 1544 product(bool, CMSIncrementalPacing, true, \ 1545 "Whether the CMS incremental mode duty cycle should be " \ 1546 "automatically adjusted") \ 1547 \ 1548 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1549 "Lower bound on the duty cycle when CMSIncrementalPacing is " \ 1550 "enabled (a percentage, 0-100)") \ 1551 \ 1552 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1553 "Percentage (0-100) used to add conservatism when computing the " \ 1554 "duty cycle") \ 1555 \ 1556 product(uintx, CMSIncrementalOffset, 0, \ 1557 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1558 " is shifted to the right within the period between young GCs") \ 1559 \ 1560 product(uintx, CMSExpAvgFactor, 50, \ 1561 "Percentage (0-100) used to weight the current sample when" \ 1562 "computing exponential averages for CMS statistics.") \ 1563 \ 1564 product(uintx, CMS_FLSWeight, 75, \ 1565 "Percentage (0-100) used to weight the current sample when" \ 1566 "computing exponentially decating averages for CMS FLS statistics.") \ 1567 \ 1568 product(uintx, CMS_FLSPadding, 1, \ 1569 "The multiple of deviation from mean to use for buffering" \ 1570 "against volatility in free list demand.") \ 1571 \ 1572 product(uintx, FLSCoalescePolicy, 2, \ 1573 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1574 \ 1575 product(bool, FLSAlwaysCoalesceLarge, false, \ 1576 "CMS: Larger free blocks are always available for coalescing") \ 1577 \ 1578 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1579 "CMS: the smaller the percentage the greater the coalition force")\ 1580 \ 1581 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1582 "CMS: the factor by which to inflate estimated demand of small" \ 1583 " block sizes to prevent coalescing with an adjoining block") \ 1584 \ 1585 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1586 "CMS: the factor by which to inflate estimated demand of large" \ 1587 " block sizes to prevent coalescing with an adjoining block") \ 1588 \ 1589 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1590 "CMS: the factor by which to inflate estimated demand of small" \ 1591 " block sizes to prevent splitting to supply demand for smaller" \ 1592 " blocks") \ 1593 \ 1594 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1595 "CMS: the factor by which to inflate estimated demand of large" \ 1596 " block sizes to prevent splitting to supply demand for smaller" \ 1597 " blocks") \ 1598 \ 1599 product(bool, CMSExtrapolateSweep, false, \ 1600 "CMS: cushion for block demand during sweep") \ 1601 \ 1602 product(uintx, CMS_SweepWeight, 75, \ 1603 "Percentage (0-100) used to weight the current sample when " \ 1604 "computing exponentially decaying average for inter-sweep " \ 1605 "duration") \ 1606 \ 1607 product(uintx, CMS_SweepPadding, 1, \ 1608 "The multiple of deviation from mean to use for buffering " \ 1609 "against volatility in inter-sweep duration.") \ 1610 \ 1611 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1612 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1613 "duration exceeds this threhold in milliseconds") \ 1614 \ 1615 develop(bool, CMSTraceIncrementalMode, false, \ 1616 "Trace CMS incremental mode") \ 1617 \ 1618 develop(bool, CMSTraceIncrementalPacing, false, \ 1619 "Trace CMS incremental mode pacing computation") \ 1620 \ 1621 develop(bool, CMSTraceThreadState, false, \ 1622 "Trace the CMS thread state (enable the trace_state() method)") \ 1623 \ 1624 product(bool, CMSClassUnloadingEnabled, true, \ 1625 "Whether class unloading enabled when using CMS GC") \ 1626 \ 1627 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1628 "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1629 " for which classes may not be unloaded") \ 1630 \ 1631 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1632 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1633 \ 1634 product(bool, UseCMSCompactAtFullCollection, true, \ 1635 "Use mark sweep compact at full collections") \ 1636 \ 1637 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1638 "Number of CMS full collection done before compaction if > 0") \ 1639 \ 1640 develop(intx, CMSDictionaryChoice, 0, \ 1641 "Use BinaryTreeDictionary as default in the CMS generation") \ 1642 \ 1643 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1644 "Replenish an indexed free list with this number of chunks") \ 1645 \ 1646 product(bool, CMSReplenishIntermediate, true, \ 1647 "Replenish all intermediate free-list caches") \ 1648 \ 1649 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1650 "When satisfying batched demand, split blocks from the " \ 1651 "IndexedFreeList whose size is a multiple of requested size") \ 1652 \ 1653 product(bool, CMSLoopWarn, false, \ 1654 "Warn in case of excessive CMS looping") \ 1655 \ 1656 develop(bool, CMSOverflowEarlyRestoration, false, \ 1657 "Whether preserved marks should be restored early") \ 1658 \ 1659 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1660 "Size of marking stack") \ 1661 \ 1662 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1663 "Max size of marking stack") \ 1664 \ 1665 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1666 "Whether we should simulate frequent marking stack / work queue" \ 1667 " overflow") \ 1668 \ 1669 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1670 "An `interval' counter that determines how frequently" \ 1671 " we simulate overflow; a smaller number increases frequency") \ 1672 \ 1673 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1674 "(Temporary, subject to experimentation)" \ 1675 "Maximum number of abortable preclean iterations, if > 0") \ 1676 \ 1677 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1678 "(Temporary, subject to experimentation)" \ 1679 "Maximum time in abortable preclean in ms") \ 1680 \ 1681 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1682 "(Temporary, subject to experimentation)" \ 1683 "Nominal minimum work per abortable preclean iteration") \ 1684 \ 1685 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1686 "(Temporary, subject to experimentation)" \ 1687 " Time that we sleep between iterations when not given" \ 1688 " enough work per iteration") \ 1689 \ 1690 product(uintx, CMSRescanMultiple, 32, \ 1691 "Size (in cards) of CMS parallel rescan task") \ 1692 \ 1693 product(uintx, CMSConcMarkMultiple, 32, \ 1694 "Size (in cards) of CMS concurrent MT marking task") \ 1695 \ 1696 product(bool, CMSAbortSemantics, false, \ 1697 "Whether abort-on-overflow semantics is implemented") \ 1698 \ 1699 product(bool, CMSParallelInitialMarkEnabled, true, \ 1700 "Use the parallel initial mark.") \ 1701 \ 1702 product(bool, CMSParallelRemarkEnabled, true, \ 1703 "Whether parallel remark enabled (only if ParNewGC)") \ 1704 \ 1705 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1706 "Whether parallel remark of survivor space" \ 1707 " enabled (effective only if CMSParallelRemarkEnabled)") \ 1708 \ 1709 product(bool, CMSPLABRecordAlways, true, \ 1710 "Whether to always record survivor space PLAB bdries" \ 1711 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1712 \ 1713 product(bool, CMSEdenChunksRecordAlways, true, \ 1714 "Whether to always record eden chunks used for " \ 1715 "the parallel initial mark or remark of eden" ) \ 1716 \ 1717 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1718 "Print the eden and the survivor chunks used for the parallel " \ 1719 "initial mark or remark of the eden/survivor spaces") \ 1720 \ 1721 product(bool, CMSConcurrentMTEnabled, true, \ 1722 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1723 \ 1724 product(bool, CMSPrecleaningEnabled, true, \ 1725 "Whether concurrent precleaning enabled") \ 1726 \ 1727 product(uintx, CMSPrecleanIter, 3, \ 1728 "Maximum number of precleaning iteration passes") \ 1729 \ 1730 product(uintx, CMSPrecleanNumerator, 2, \ 1731 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1732 " ratio") \ 1733 \ 1734 product(uintx, CMSPrecleanDenominator, 3, \ 1735 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1736 " ratio") \ 1737 \ 1738 product(bool, CMSPrecleanRefLists1, true, \ 1739 "Preclean ref lists during (initial) preclean phase") \ 1740 \ 1741 product(bool, CMSPrecleanRefLists2, false, \ 1742 "Preclean ref lists during abortable preclean phase") \ 1743 \ 1744 product(bool, CMSPrecleanSurvivors1, false, \ 1745 "Preclean survivors during (initial) preclean phase") \ 1746 \ 1747 product(bool, CMSPrecleanSurvivors2, true, \ 1748 "Preclean survivors during abortable preclean phase") \ 1749 \ 1750 product(uintx, CMSPrecleanThreshold, 1000, \ 1751 "Don't re-iterate if #dirty cards less than this") \ 1752 \ 1753 product(bool, CMSCleanOnEnter, true, \ 1754 "Clean-on-enter optimization for reducing number of dirty cards") \ 1755 \ 1756 product(uintx, CMSRemarkVerifyVariant, 1, \ 1757 "Choose variant (1,2) of verification following remark") \ 1758 \ 1759 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1760 "If Eden used is below this value, don't try to schedule remark") \ 1761 \ 1762 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1763 "The Eden occupancy % at which to try and schedule remark pause") \ 1764 \ 1765 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1766 "Start sampling Eden top at least before yg occupancy reaches" \ 1767 " 1/<ratio> of the size at which we plan to schedule remark") \ 1768 \ 1769 product(uintx, CMSSamplingGrain, 16*K, \ 1770 "The minimum distance between eden samples for CMS (see above)") \ 1771 \ 1772 product(bool, CMSScavengeBeforeRemark, false, \ 1773 "Attempt scavenge before the CMS remark step") \ 1774 \ 1775 develop(bool, CMSTraceSweeper, false, \ 1776 "Trace some actions of the CMS sweeper") \ 1777 \ 1778 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1779 "Don't drain below this size per parallel worker/thief") \ 1780 \ 1781 manageable(intx, CMSWaitDuration, 2000, \ 1782 "Time in milliseconds that CMS thread waits for young GC") \ 1783 \ 1784 develop(uintx, CMSCheckInterval, 1000, \ 1785 "Interval in milliseconds that CMS thread checks if it " \ 1786 "should start a collection cycle") \ 1787 \ 1788 product(bool, CMSYield, true, \ 1789 "Yield between steps of concurrent mark & sweep") \ 1790 \ 1791 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1792 "Bitmap operations should process at most this many bits" \ 1793 "between yields") \ 1794 \ 1795 product(bool, CMSDumpAtPromotionFailure, false, \ 1796 "Dump useful information about the state of the CMS old " \ 1797 " generation upon a promotion failure.") \ 1798 \ 1799 product(bool, CMSPrintChunksInDump, false, \ 1800 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1801 " more detailed information about the free chunks.") \ 1802 \ 1803 product(bool, CMSPrintObjectsInDump, false, \ 1804 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1805 " more detailed information about the allocated objects.") \ 1806 \ 1807 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1808 "Verify that all refs across the FLS boundary " \ 1809 " are to valid objects") \ 1810 \ 1811 diagnostic(bool, FLSVerifyLists, false, \ 1812 "Do lots of (expensive) FreeListSpace verification") \ 1813 \ 1814 diagnostic(bool, FLSVerifyIndexTable, false, \ 1815 "Do lots of (expensive) FLS index table verification") \ 1816 \ 1817 develop(bool, FLSVerifyDictionary, false, \ 1818 "Do lots of (expensive) FLS dictionary verification") \ 1819 \ 1820 develop(bool, VerifyBlockOffsetArray, false, \ 1821 "Do (expensive!) block offset array verification") \ 1822 \ 1823 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1824 "Maintain _unallocated_block in BlockOffsetArray" \ 1825 " (currently applicable only to CMS collector)") \ 1826 \ 1827 develop(bool, TraceCMSState, false, \ 1828 "Trace the state of the CMS collection") \ 1829 \ 1830 product(intx, RefDiscoveryPolicy, 0, \ 1831 "Whether reference-based(0) or referent-based(1)") \ 1832 \ 1833 product(bool, ParallelRefProcEnabled, false, \ 1834 "Enable parallel reference processing whenever possible") \ 1835 \ 1836 product(bool, ParallelRefProcBalancingEnabled, true, \ 1837 "Enable balancing of reference processing queues") \ 1838 \ 1839 product(uintx, CMSTriggerRatio, 80, \ 1840 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1841 "allocated before a CMS collection cycle commences") \ 1842 \ 1843 product(uintx, CMSBootstrapOccupancy, 50, \ 1844 "Percentage CMS generation occupancy at which to " \ 1845 "initiate CMS collection for bootstrapping collection stats") \ 1846 \ 1847 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1848 "Percentage CMS generation occupancy to start a CMS collection " \ 1849 "cycle. A negative value means that CMSTriggerRatio is used") \ 1850 \ 1851 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1852 "Percentage of the (entire) heap occupancy to start a " \ 1853 "concurrent GC cycle. It is used by GCs that trigger a " \ 1854 "concurrent GC cycle based on the occupancy of the entire heap, " \ 1855 "not just one of the generations (e.g., G1). A value of 0 " \ 1856 "denotes 'do constant GC cycles'.") \ 1857 \ 1858 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1859 "Only use occupancy as a crierion for starting a CMS collection") \ 1860 \ 1861 product(uintx, CMSIsTooFullPercentage, 98, \ 1862 "An absolute ceiling above which CMS will always consider the " \ 1863 "unloading of classes when class unloading is enabled") \ 1864 \ 1865 develop(bool, CMSTestInFreeList, false, \ 1866 "Check if the coalesced range is already in the " \ 1867 "free lists as claimed") \ 1868 \ 1869 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1870 "Check that all the garbage collected was returned to the " \ 1871 "free lists.") \ 1872 \ 1873 notproduct(bool, ScavengeALot, false, \ 1874 "Force scavenge at every Nth exit from the runtime system " \ 1875 "(N=ScavengeALotInterval)") \ 1876 \ 1877 develop(bool, FullGCALot, false, \ 1878 "Force full gc at every Nth exit from the runtime system " \ 1879 "(N=FullGCALotInterval)") \ 1880 \ 1881 notproduct(bool, GCALotAtAllSafepoints, false, \ 1882 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1883 \ 1884 product(bool, PrintPromotionFailure, false, \ 1885 "Print additional diagnostic information following " \ 1886 " promotion failure") \ 1887 \ 1888 notproduct(bool, PromotionFailureALot, false, \ 1889 "Use promotion failure handling on every youngest generation " \ 1890 "collection") \ 1891 \ 1892 develop(uintx, PromotionFailureALotCount, 1000, \ 1893 "Number of promotion failures occurring at ParGCAllocBuffer" \ 1894 "refill attempts (ParNew) or promotion attempts " \ 1895 "(other young collectors) ") \ 1896 \ 1897 develop(uintx, PromotionFailureALotInterval, 5, \ 1898 "Total collections between promotion failures alot") \ 1899 \ 1900 experimental(uintx, WorkStealingSleepMillis, 1, \ 1901 "Sleep time when sleep is used for yields") \ 1902 \ 1903 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 1904 "Number of yields before a sleep is done during workstealing") \ 1905 \ 1906 experimental(uintx, WorkStealingHardSpins, 4096, \ 1907 "Number of iterations in a spin loop between checks on " \ 1908 "time out of hard spin") \ 1909 \ 1910 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 1911 "Ratio of hard spins to calls to yield") \ 1912 \ 1913 develop(uintx, ObjArrayMarkingStride, 512, \ 1914 "Number of ObjArray elements to push onto the marking stack" \ 1915 "before pushing a continuation entry") \ 1916 \ 1917 develop(bool, MetadataAllocationFailALot, false, \ 1918 "Fail metadata allocations at intervals controlled by " \ 1919 "MetadataAllocationFailALotInterval") \ 1920 \ 1921 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 1922 "metadata allocation failure alot interval") \ 1923 \ 1924 develop(bool, MetaDataDeallocateALot, false, \ 1925 "Deallocation bunches of metadata at intervals controlled by " \ 1926 "MetaDataAllocateALotInterval") \ 1927 \ 1928 develop(uintx, MetaDataDeallocateALotInterval, 100, \ 1929 "Metadata deallocation alot interval") \ 1930 \ 1931 develop(bool, TraceMetadataChunkAllocation, false, \ 1932 "Trace chunk metadata allocations") \ 1933 \ 1934 product(bool, TraceMetadataHumongousAllocation, false, \ 1935 "Trace humongous metadata allocations") \ 1936 \ 1937 develop(bool, TraceMetavirtualspaceAllocation, false, \ 1938 "Trace virtual space metadata allocations") \ 1939 \ 1940 notproduct(bool, ExecuteInternalVMTests, false, \ 1941 "Enable execution of internal VM tests.") \ 1942 \ 1943 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1944 \ 1945 product_pd(bool, ResizeTLAB, \ 1946 "Dynamically resize tlab size for threads") \ 1947 \ 1948 product(bool, ZeroTLAB, false, \ 1949 "Zero out the newly created TLAB") \ 1950 \ 1951 product(bool, FastTLABRefill, true, \ 1952 "Use fast TLAB refill code") \ 1953 \ 1954 product(bool, PrintTLAB, false, \ 1955 "Print various TLAB related information") \ 1956 \ 1957 product(bool, TLABStats, true, \ 1958 "Print various TLAB related information") \ 1959 \ 1960 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 1961 "Enable LowMemoryProtection")) \ 1962 \ 1963 product_pd(bool, NeverActAsServerClassMachine, \ 1964 "Never act like a server-class machine") \ 1965 \ 1966 product(bool, AlwaysActAsServerClassMachine, false, \ 1967 "Always act like a server-class machine") \ 1968 \ 1969 product_pd(uint64_t, MaxRAM, \ 1970 "Real memory size (in bytes) used to set maximum heap size") \ 1971 \ 1972 product(uintx, ErgoHeapSizeLimit, 0, \ 1973 "Maximum ergonomically set heap size (in bytes); zero means use " \ 1974 "MaxRAM / MaxRAMFraction") \ 1975 \ 1976 product(uintx, MaxRAMFraction, 4, \ 1977 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1978 "size") \ 1979 \ 1980 product(uintx, DefaultMaxRAMFraction, 4, \ 1981 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1982 "size; deprecated: to be renamed to MaxRAMFraction") \ 1983 \ 1984 product(uintx, MinRAMFraction, 2, \ 1985 "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 1986 "size on systems with small physical memory size") \ 1987 \ 1988 product(uintx, InitialRAMFraction, 64, \ 1989 "Fraction (1/n) of real memory used for initial heap size") \ 1990 \ 1991 develop(uintx, MaxVirtMemFraction, 2, \ 1992 "Maximum fraction (1/n) of virtual memory used for ergonomically" \ 1993 "determining maximum heap size") \ 1994 \ 1995 product(bool, UseAutoGCSelectPolicy, false, \ 1996 "Use automatic collection selection policy") \ 1997 \ 1998 product(uintx, AutoGCSelectPauseMillis, 5000, \ 1999 "Automatic GC selection pause threshhold in ms") \ 2000 \ 2001 product(bool, UseAdaptiveSizePolicy, true, \ 2002 "Use adaptive generation sizing policies") \ 2003 \ 2004 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2005 "Use adaptive survivor sizing policies") \ 2006 \ 2007 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2008 "Use adaptive young-old sizing policies at minor collections") \ 2009 \ 2010 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2011 "Use adaptive young-old sizing policies at major collections") \ 2012 \ 2013 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2014 "Use statistics from System.GC for adaptive size policy") \ 2015 \ 2016 product(bool, UseAdaptiveGCBoundary, false, \ 2017 "Allow young-old boundary to move") \ 2018 \ 2019 develop(bool, TraceAdaptiveGCBoundary, false, \ 2020 "Trace young-old boundary moves") \ 2021 \ 2022 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2023 "Resize the virtual spaces of the young or old generations") \ 2024 \ 2025 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2026 "Policy for changeing generation size for throughput goals") \ 2027 \ 2028 product(uintx, AdaptiveSizePausePolicy, 0, \ 2029 "Policy for changing generation size for pause goals") \ 2030 \ 2031 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 2032 "Adjust tenured generation to achive a minor pause goal") \ 2033 \ 2034 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2035 "Adjust young generation to achive a major pause goal") \ 2036 \ 2037 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2038 "Number of steps where heuristics is used before data is used") \ 2039 \ 2040 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2041 "Number of collections before the adaptive sizing is started") \ 2042 \ 2043 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2044 "Collection interval for printing information; zero means never") \ 2045 \ 2046 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2047 "Use adaptive minimum footprint as a goal") \ 2048 \ 2049 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2050 "Weight given to exponential resizing, between 0 and 100") \ 2051 \ 2052 product(uintx, AdaptiveTimeWeight, 25, \ 2053 "Weight given to time in adaptive policy, between 0 and 100") \ 2054 \ 2055 product(uintx, PausePadding, 1, \ 2056 "How much buffer to keep for pause time") \ 2057 \ 2058 product(uintx, PromotedPadding, 3, \ 2059 "How much buffer to keep for promotion failure") \ 2060 \ 2061 product(uintx, SurvivorPadding, 3, \ 2062 "How much buffer to keep for survivor overflow") \ 2063 \ 2064 product(uintx, ThresholdTolerance, 10, \ 2065 "Allowed collection cost difference between generations") \ 2066 \ 2067 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2068 "If collection costs are within margin, reduce both by full " \ 2069 "delta") \ 2070 \ 2071 product(uintx, YoungGenerationSizeIncrement, 20, \ 2072 "Adaptive size percentage change in young generation") \ 2073 \ 2074 product(uintx, YoungGenerationSizeSupplement, 80, \ 2075 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2076 \ 2077 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2078 "Decay factor to YoungedGenerationSizeSupplement") \ 2079 \ 2080 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2081 "Adaptive size percentage change in tenured generation") \ 2082 \ 2083 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2084 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2085 \ 2086 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2087 "Decay factor to TenuredGenerationSizeIncrement") \ 2088 \ 2089 product(uintx, MaxGCPauseMillis, max_uintx, \ 2090 "Adaptive size policy maximum GC pause time goal in msec, " \ 2091 "or (G1 Only) the max. GC time per MMU time slice") \ 2092 \ 2093 product(uintx, GCPauseIntervalMillis, 0, \ 2094 "Time slice for MMU specification") \ 2095 \ 2096 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2097 "Adaptive size policy maximum GC minor pause time goal in msec") \ 2098 \ 2099 product(uintx, GCTimeRatio, 99, \ 2100 "Adaptive size policy application time to GC time ratio") \ 2101 \ 2102 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2103 "Adaptive size scale down factor for shrinking") \ 2104 \ 2105 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2106 "Adaptive size decays the major cost for long major intervals") \ 2107 \ 2108 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2109 "Time scale over which major costs decay") \ 2110 \ 2111 product(uintx, MinSurvivorRatio, 3, \ 2112 "Minimum ratio of young generation/survivor space size") \ 2113 \ 2114 product(uintx, InitialSurvivorRatio, 8, \ 2115 "Initial ratio of eden/survivor space size") \ 2116 \ 2117 product(uintx, BaseFootPrintEstimate, 256*M, \ 2118 "Estimate of footprint other than Java Heap") \ 2119 \ 2120 product(bool, UseGCOverheadLimit, true, \ 2121 "Use policy to limit of proportion of time spent in GC " \ 2122 "before an OutOfMemory error is thrown") \ 2123 \ 2124 product(uintx, GCTimeLimit, 98, \ 2125 "Limit of proportion of time spent in GC before an OutOfMemory" \ 2126 "error is thrown (used with GCHeapFreeLimit)") \ 2127 \ 2128 product(uintx, GCHeapFreeLimit, 2, \ 2129 "Minimum percentage of free space after a full GC before an " \ 2130 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2131 \ 2132 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2133 "Number of consecutive collections before gc time limit fires") \ 2134 \ 2135 product(bool, PrintAdaptiveSizePolicy, false, \ 2136 "Print information about AdaptiveSizePolicy") \ 2137 \ 2138 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2139 "How far ahead to prefetch destination area (<= 0 means off)") \ 2140 \ 2141 product(intx, PrefetchScanIntervalInBytes, -1, \ 2142 "How far ahead to prefetch scan area (<= 0 means off)") \ 2143 \ 2144 product(intx, PrefetchFieldsAhead, -1, \ 2145 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2146 \ 2147 diagnostic(bool, VerifySilently, false, \ 2148 "Don't print print the verification progress") \ 2149 \ 2150 diagnostic(bool, VerifyDuringStartup, false, \ 2151 "Verify memory system before executing any Java code " \ 2152 "during VM initialization") \ 2153 \ 2154 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2155 "Verify system before exiting") \ 2156 \ 2157 diagnostic(bool, VerifyBeforeGC, false, \ 2158 "Verify memory system before GC") \ 2159 \ 2160 diagnostic(bool, VerifyAfterGC, false, \ 2161 "Verify memory system after GC") \ 2162 \ 2163 diagnostic(bool, VerifyDuringGC, false, \ 2164 "Verify memory system during GC (between phases)") \ 2165 \ 2166 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2167 "Enable parallel memory system verification") \ 2168 \ 2169 diagnostic(bool, DeferInitialCardMark, false, \ 2170 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2171 "may arise from new_pre_store_barrier") \ 2172 \ 2173 diagnostic(bool, VerifyRememberedSets, false, \ 2174 "Verify GC remembered sets") \ 2175 \ 2176 diagnostic(bool, VerifyObjectStartArray, true, \ 2177 "Verify GC object start array if verify before/after") \ 2178 \ 2179 product(bool, DisableExplicitGC, false, \ 2180 "Tells whether calling System.gc() does a full GC") \ 2181 \ 2182 notproduct(bool, CheckMemoryInitialization, false, \ 2183 "Checks memory initialization") \ 2184 \ 2185 product(bool, CollectGen0First, false, \ 2186 "Collect youngest generation before each full GC") \ 2187 \ 2188 diagnostic(bool, BindCMSThreadToCPU, false, \ 2189 "Bind CMS Thread to CPU if possible") \ 2190 \ 2191 diagnostic(uintx, CPUForCMSThread, 0, \ 2192 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2193 \ 2194 product(bool, BindGCTaskThreadsToCPUs, false, \ 2195 "Bind GCTaskThreads to CPUs if possible") \ 2196 \ 2197 product(bool, UseGCTaskAffinity, false, \ 2198 "Use worker affinity when asking for GCTasks") \ 2199 \ 2200 product(uintx, ProcessDistributionStride, 4, \ 2201 "Stride through processors when distributing processes") \ 2202 \ 2203 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2204 "number of times the coordinator GC thread will sleep while " \ 2205 "yielding before giving up and resuming GC") \ 2206 \ 2207 product(uintx, CMSYieldSleepCount, 0, \ 2208 "number of times a GC thread (minus the coordinator) " \ 2209 "will sleep while yielding before giving up and resuming GC") \ 2210 \ 2211 /* gc tracing */ \ 2212 manageable(bool, PrintGC, false, \ 2213 "Print message at garbage collect") \ 2214 \ 2215 manageable(bool, PrintGCDetails, false, \ 2216 "Print more details at garbage collect") \ 2217 \ 2218 manageable(bool, PrintGCDateStamps, false, \ 2219 "Print date stamps at garbage collect") \ 2220 \ 2221 manageable(bool, PrintGCTimeStamps, false, \ 2222 "Print timestamps at garbage collect") \ 2223 \ 2224 product(bool, PrintGCTaskTimeStamps, false, \ 2225 "Print timestamps for individual gc worker thread tasks") \ 2226 \ 2227 develop(intx, ConcGCYieldTimeout, 0, \ 2228 "If non-zero, assert that GC threads yield within this # of ms.") \ 2229 \ 2230 notproduct(bool, TraceMarkSweep, false, \ 2231 "Trace mark sweep") \ 2232 \ 2233 product(bool, PrintReferenceGC, false, \ 2234 "Print times spent handling reference objects during GC " \ 2235 " (enabled only when PrintGCDetails)") \ 2236 \ 2237 develop(bool, TraceReferenceGC, false, \ 2238 "Trace handling of soft/weak/final/phantom references") \ 2239 \ 2240 develop(bool, TraceFinalizerRegistration, false, \ 2241 "Trace registration of final references") \ 2242 \ 2243 notproduct(bool, TraceScavenge, false, \ 2244 "Trace scavenge") \ 2245 \ 2246 product_rw(bool, TraceClassLoading, false, \ 2247 "Trace all classes loaded") \ 2248 \ 2249 product(bool, TraceClassLoadingPreorder, false, \ 2250 "Trace all classes loaded in order referenced (not loaded)") \ 2251 \ 2252 product_rw(bool, TraceClassUnloading, false, \ 2253 "Trace unloading of classes") \ 2254 \ 2255 product_rw(bool, TraceLoaderConstraints, false, \ 2256 "Trace loader constraints") \ 2257 \ 2258 develop(bool, TraceClassLoaderData, false, \ 2259 "Trace class loader loader_data lifetime") \ 2260 \ 2261 product(uintx, InitialBootClassLoaderMetaspaceSize, \ 2262 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2263 "Initial size of the boot class loader data metaspace") \ 2264 \ 2265 product(bool, TraceGen0Time, false, \ 2266 "Trace accumulated time for Gen 0 collection") \ 2267 \ 2268 product(bool, TraceGen1Time, false, \ 2269 "Trace accumulated time for Gen 1 collection") \ 2270 \ 2271 product(bool, PrintTenuringDistribution, false, \ 2272 "Print tenuring age information") \ 2273 \ 2274 product_rw(bool, PrintHeapAtGC, false, \ 2275 "Print heap layout before and after each GC") \ 2276 \ 2277 product_rw(bool, PrintHeapAtGCExtended, false, \ 2278 "Prints extended information about the layout of the heap " \ 2279 "when -XX:+PrintHeapAtGC is set") \ 2280 \ 2281 product(bool, PrintHeapAtSIGBREAK, true, \ 2282 "Print heap layout in response to SIGBREAK") \ 2283 \ 2284 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2285 "Print a class histogram before any major stop-world GC") \ 2286 \ 2287 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2288 "Print a class histogram after any major stop-world GC") \ 2289 \ 2290 manageable(bool, PrintClassHistogram, false, \ 2291 "Print a histogram of class instances") \ 2292 \ 2293 develop(bool, TraceWorkGang, false, \ 2294 "Trace activities of work gangs") \ 2295 \ 2296 product(bool, TraceParallelOldGCTasks, false, \ 2297 "Trace multithreaded GC activity") \ 2298 \ 2299 develop(bool, TraceBlockOffsetTable, false, \ 2300 "Print BlockOffsetTable maps") \ 2301 \ 2302 develop(bool, TraceCardTableModRefBS, false, \ 2303 "Print CardTableModRefBS maps") \ 2304 \ 2305 develop(bool, TraceGCTaskManager, false, \ 2306 "Trace actions of the GC task manager") \ 2307 \ 2308 develop(bool, TraceGCTaskQueue, false, \ 2309 "Trace actions of the GC task queues") \ 2310 \ 2311 diagnostic(bool, TraceGCTaskThread, false, \ 2312 "Trace actions of the GC task threads") \ 2313 \ 2314 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2315 "Print the time taken by each parallel old gc phase." \ 2316 "PrintGCDetails must also be enabled.") \ 2317 \ 2318 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2319 "Trace parallel old gc marking phase") \ 2320 \ 2321 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2322 "Trace parallel old gc summary phase") \ 2323 \ 2324 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2325 "Trace parallel old gc compaction phase") \ 2326 \ 2327 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2328 "Trace parallel old gc dense prefix computation") \ 2329 \ 2330 develop(bool, IgnoreLibthreadGPFault, false, \ 2331 "Suppress workaround for libthread GP fault") \ 2332 \ 2333 product(bool, PrintJNIGCStalls, false, \ 2334 "Print diagnostic message when GC is stalled" \ 2335 "by JNI critical section") \ 2336 \ 2337 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2338 "The percentage of the used heap that the instances of a class " \ 2339 "must occupy for the class to generate a trace event.") \ 2340 \ 2341 /* GC log rotation setting */ \ 2342 \ 2343 product(bool, UseGCLogFileRotation, false, \ 2344 "Prevent large gclog file for long running app. " \ 2345 "Requires -Xloggc:<filename>") \ 2346 \ 2347 product(uintx, NumberOfGCLogFiles, 0, \ 2348 "Number of gclog files in rotation, " \ 2349 "Default: 0, no rotation") \ 2350 \ 2351 product(uintx, GCLogFileSize, 0, \ 2352 "GC log file size, Default: 0 bytes, no rotation " \ 2353 "Only valid with UseGCLogFileRotation") \ 2354 \ 2355 /* JVMTI heap profiling */ \ 2356 \ 2357 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2358 "Trace JVMTI object tagging calls") \ 2359 \ 2360 diagnostic(bool, VerifyBeforeIteration, false, \ 2361 "Verify memory system before JVMTI iteration") \ 2362 \ 2363 /* compiler interface */ \ 2364 \ 2365 develop(bool, CIPrintCompilerName, false, \ 2366 "when CIPrint is active, print the name of the active compiler") \ 2367 \ 2368 develop(bool, CIPrintCompileQueue, false, \ 2369 "display the contents of the compile queue whenever a " \ 2370 "compilation is enqueued") \ 2371 \ 2372 develop(bool, CIPrintRequests, false, \ 2373 "display every request for compilation") \ 2374 \ 2375 product(bool, CITime, false, \ 2376 "collect timing information for compilation") \ 2377 \ 2378 develop(bool, CITimeEach, false, \ 2379 "display timing information after each successful compilation") \ 2380 \ 2381 develop(bool, CICountOSR, false, \ 2382 "use a separate counter when assigning ids to osr compilations") \ 2383 \ 2384 develop(bool, CICompileNatives, true, \ 2385 "compile native methods if supported by the compiler") \ 2386 \ 2387 develop_pd(bool, CICompileOSR, \ 2388 "compile on stack replacement methods if supported by the " \ 2389 "compiler") \ 2390 \ 2391 develop(bool, CIPrintMethodCodes, false, \ 2392 "print method bytecodes of the compiled code") \ 2393 \ 2394 develop(bool, CIPrintTypeFlow, false, \ 2395 "print the results of ciTypeFlow analysis") \ 2396 \ 2397 develop(bool, CITraceTypeFlow, false, \ 2398 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2399 \ 2400 develop(intx, OSROnlyBCI, -1, \ 2401 "OSR only at this bci. Negative values mean exclude that bci") \ 2402 \ 2403 /* compiler */ \ 2404 \ 2405 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2406 "Number of compiler threads to run") \ 2407 \ 2408 product(intx, CompilationPolicyChoice, 0, \ 2409 "which compilation policy (0/1)") \ 2410 \ 2411 develop(bool, UseStackBanging, true, \ 2412 "use stack banging for stack overflow checks (required for " \ 2413 "proper StackOverflow handling; disable only to measure cost " \ 2414 "of stackbanging)") \ 2415 \ 2416 develop(bool, UseStrictFP, true, \ 2417 "use strict fp if modifier strictfp is set") \ 2418 \ 2419 develop(bool, GenerateSynchronizationCode, true, \ 2420 "generate locking/unlocking code for synchronized methods and " \ 2421 "monitors") \ 2422 \ 2423 develop(bool, GenerateCompilerNullChecks, true, \ 2424 "Generate explicit null checks for loads/stores/calls") \ 2425 \ 2426 develop(bool, GenerateRangeChecks, true, \ 2427 "Generate range checks for array accesses") \ 2428 \ 2429 develop_pd(bool, ImplicitNullChecks, \ 2430 "generate code for implicit null checks") \ 2431 \ 2432 product(bool, PrintSafepointStatistics, false, \ 2433 "print statistics about safepoint synchronization") \ 2434 \ 2435 product(intx, PrintSafepointStatisticsCount, 300, \ 2436 "total number of safepoint statistics collected " \ 2437 "before printing them out") \ 2438 \ 2439 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2440 "print safepoint statistics only when safepoint takes" \ 2441 " more than PrintSafepointSatisticsTimeout in millis") \ 2442 \ 2443 product(bool, TraceSafepointCleanupTime, false, \ 2444 "print the break down of clean up tasks performed during" \ 2445 " safepoint") \ 2446 \ 2447 product(bool, Inline, true, \ 2448 "enable inlining") \ 2449 \ 2450 product(bool, ClipInlining, true, \ 2451 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2452 \ 2453 develop(bool, UseCHA, true, \ 2454 "enable CHA") \ 2455 \ 2456 product(bool, UseTypeProfile, true, \ 2457 "Check interpreter profile for historically monomorphic calls") \ 2458 \ 2459 notproduct(bool, TimeCompiler, false, \ 2460 "time the compiler") \ 2461 \ 2462 diagnostic(bool, PrintInlining, false, \ 2463 "prints inlining optimizations") \ 2464 \ 2465 product(bool, UsePopCountInstruction, false, \ 2466 "Use population count instruction") \ 2467 \ 2468 develop(bool, EagerInitialization, false, \ 2469 "Eagerly initialize classes if possible") \ 2470 \ 2471 develop(bool, TraceMethodReplacement, false, \ 2472 "Print when methods are replaced do to recompilation") \ 2473 \ 2474 develop(bool, PrintMethodFlushing, false, \ 2475 "print the nmethods being flushed") \ 2476 \ 2477 develop(bool, UseRelocIndex, false, \ 2478 "use an index to speed random access to relocations") \ 2479 \ 2480 develop(bool, StressCodeBuffers, false, \ 2481 "Exercise code buffer expansion and other rare state changes") \ 2482 \ 2483 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2484 "Generate extra debugging info for non-safepoints in nmethods") \ 2485 \ 2486 product(bool, PrintVMOptions, false, \ 2487 "Print flags that appeared on the command line") \ 2488 \ 2489 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2490 "Ignore unrecognized VM options") \ 2491 \ 2492 product(bool, PrintCommandLineFlags, false, \ 2493 "Print flags specified on command line or set by ergonomics") \ 2494 \ 2495 product(bool, PrintFlagsInitial, false, \ 2496 "Print all VM flags before argument processing and exit VM") \ 2497 \ 2498 product(bool, PrintFlagsFinal, false, \ 2499 "Print all VM flags after argument and ergonomic processing") \ 2500 \ 2501 notproduct(bool, PrintFlagsWithComments, false, \ 2502 "Print all VM flags with default values and descriptions and exit")\ 2503 \ 2504 diagnostic(bool, SerializeVMOutput, true, \ 2505 "Use a mutex to serialize output to tty and hotspot.log") \ 2506 \ 2507 diagnostic(bool, DisplayVMOutput, true, \ 2508 "Display all VM output on the tty, independently of LogVMOutput") \ 2509 \ 2510 diagnostic(bool, LogVMOutput, trueInDebug, \ 2511 "Save VM output to hotspot.log, or to LogFile") \ 2512 \ 2513 diagnostic(ccstr, LogFile, NULL, \ 2514 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2515 \ 2516 product(ccstr, ErrorFile, NULL, \ 2517 "If an error occurs, save the error data to this file " \ 2518 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2519 \ 2520 product(bool, DisplayVMOutputToStderr, false, \ 2521 "If DisplayVMOutput is true, display all VM output to stderr") \ 2522 \ 2523 product(bool, DisplayVMOutputToStdout, false, \ 2524 "If DisplayVMOutput is true, display all VM output to stdout") \ 2525 \ 2526 product(bool, UseHeavyMonitors, false, \ 2527 "use heavyweight instead of lightweight Java monitors") \ 2528 \ 2529 product(bool, PrintStringTableStatistics, false, \ 2530 "print statistics about the StringTable and SymbolTable") \ 2531 \ 2532 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2533 "print histogram of the symbol table") \ 2534 \ 2535 notproduct(bool, ExitVMOnVerifyError, false, \ 2536 "standard exit from VM if bytecode verify error " \ 2537 "(only in debug mode)") \ 2538 \ 2539 notproduct(ccstr, AbortVMOnException, NULL, \ 2540 "Call fatal if this exception is thrown. Example: " \ 2541 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2542 \ 2543 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2544 "Call fatal if the exception pointed by AbortVMOnException " \ 2545 "has this message.") \ 2546 \ 2547 develop(bool, DebugVtables, false, \ 2548 "add debugging code to vtable dispatch") \ 2549 \ 2550 develop(bool, PrintVtables, false, \ 2551 "print vtables when printing klass") \ 2552 \ 2553 notproduct(bool, PrintVtableStats, false, \ 2554 "print vtables stats at end of run") \ 2555 \ 2556 develop(bool, TraceCreateZombies, false, \ 2557 "trace creation of zombie nmethods") \ 2558 \ 2559 notproduct(bool, IgnoreLockingAssertions, false, \ 2560 "disable locking assertions (for speed)") \ 2561 \ 2562 product(bool, RangeCheckElimination, true, \ 2563 "Eliminate range checks") \ 2564 \ 2565 develop_pd(bool, UncommonNullCast, \ 2566 "track occurrences of null in casts; adjust compiler tactics") \ 2567 \ 2568 develop(bool, TypeProfileCasts, true, \ 2569 "treat casts like calls for purposes of type profiling") \ 2570 \ 2571 develop(bool, DelayCompilationDuringStartup, true, \ 2572 "Delay invoking the compiler until main application class is " \ 2573 "loaded") \ 2574 \ 2575 develop(bool, CompileTheWorld, false, \ 2576 "Compile all methods in all classes in bootstrap class path " \ 2577 "(stress test)") \ 2578 \ 2579 develop(bool, CompileTheWorldPreloadClasses, true, \ 2580 "Preload all classes used by a class before start loading") \ 2581 \ 2582 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2583 "Force a safepoint every n compiles so sweeper can keep up") \ 2584 \ 2585 develop(bool, FillDelaySlots, true, \ 2586 "Fill delay slots (on SPARC only)") \ 2587 \ 2588 develop(bool, TimeLivenessAnalysis, false, \ 2589 "Time computation of bytecode liveness analysis") \ 2590 \ 2591 develop(bool, TraceLivenessGen, false, \ 2592 "Trace the generation of liveness analysis information") \ 2593 \ 2594 notproduct(bool, TraceLivenessQuery, false, \ 2595 "Trace queries of liveness analysis information") \ 2596 \ 2597 notproduct(bool, CollectIndexSetStatistics, false, \ 2598 "Collect information about IndexSets") \ 2599 \ 2600 develop(bool, UseLoopSafepoints, true, \ 2601 "Generate Safepoint nodes in every loop") \ 2602 \ 2603 develop(intx, FastAllocateSizeLimit, 128*K, \ 2604 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2605 "Inline allocations larger than this in doublewords must go slow")\ 2606 \ 2607 product(bool, AggressiveOpts, false, \ 2608 "Enable aggressive optimizations - see arguments.cpp") \ 2609 \ 2610 /* statistics */ \ 2611 develop(bool, CountCompiledCalls, false, \ 2612 "counts method invocations") \ 2613 \ 2614 notproduct(bool, CountRuntimeCalls, false, \ 2615 "counts VM runtime calls") \ 2616 \ 2617 develop(bool, CountJNICalls, false, \ 2618 "counts jni method invocations") \ 2619 \ 2620 notproduct(bool, CountJVMCalls, false, \ 2621 "counts jvm method invocations") \ 2622 \ 2623 notproduct(bool, CountRemovableExceptions, false, \ 2624 "count exceptions that could be replaced by branches due to " \ 2625 "inlining") \ 2626 \ 2627 notproduct(bool, ICMissHistogram, false, \ 2628 "produce histogram of IC misses") \ 2629 \ 2630 notproduct(bool, PrintClassStatistics, false, \ 2631 "prints class statistics at end of run") \ 2632 \ 2633 notproduct(bool, PrintMethodStatistics, false, \ 2634 "prints method statistics at end of run") \ 2635 \ 2636 /* interpreter */ \ 2637 develop(bool, ClearInterpreterLocals, false, \ 2638 "Always clear local variables of interpreter activations upon " \ 2639 "entry") \ 2640 \ 2641 product_pd(bool, RewriteBytecodes, \ 2642 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2643 \ 2644 product_pd(bool, RewriteFrequentPairs, \ 2645 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2646 \ 2647 diagnostic(bool, PrintInterpreter, false, \ 2648 "Prints the generated interpreter code") \ 2649 \ 2650 product(bool, UseInterpreter, true, \ 2651 "Use interpreter for non-compiled methods") \ 2652 \ 2653 develop(bool, UseFastSignatureHandlers, true, \ 2654 "Use fast signature handlers for native calls") \ 2655 \ 2656 product(bool, UseLoopCounter, true, \ 2657 "Increment invocation counter on backward branch") \ 2658 \ 2659 product(bool, UseFastEmptyMethods, true, \ 2660 "Use fast method entry code for empty methods") \ 2661 \ 2662 product(bool, UseFastAccessorMethods, true, \ 2663 "Use fast method entry code for accessor methods") \ 2664 \ 2665 product_pd(bool, UseOnStackReplacement, \ 2666 "Use on stack replacement, calls runtime if invoc. counter " \ 2667 "overflows in loop") \ 2668 \ 2669 notproduct(bool, TraceOnStackReplacement, false, \ 2670 "Trace on stack replacement") \ 2671 \ 2672 product_pd(bool, PreferInterpreterNativeStubs, \ 2673 "Use always interpreter stubs for native methods invoked via " \ 2674 "interpreter") \ 2675 \ 2676 develop(bool, CountBytecodes, false, \ 2677 "Count number of bytecodes executed") \ 2678 \ 2679 develop(bool, PrintBytecodeHistogram, false, \ 2680 "Print histogram of the executed bytecodes") \ 2681 \ 2682 develop(bool, PrintBytecodePairHistogram, false, \ 2683 "Print histogram of the executed bytecode pairs") \ 2684 \ 2685 diagnostic(bool, PrintSignatureHandlers, false, \ 2686 "Print code generated for native method signature handlers") \ 2687 \ 2688 develop(bool, VerifyOops, false, \ 2689 "Do plausibility checks for oops") \ 2690 \ 2691 develop(bool, CheckUnhandledOops, false, \ 2692 "Check for unhandled oops in VM code") \ 2693 \ 2694 develop(bool, VerifyJNIFields, trueInDebug, \ 2695 "Verify jfieldIDs for instance fields") \ 2696 \ 2697 notproduct(bool, VerifyJNIEnvThread, false, \ 2698 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2699 "from JNI") \ 2700 \ 2701 develop(bool, VerifyFPU, false, \ 2702 "Verify FPU state (check for NaN's, etc.)") \ 2703 \ 2704 develop(bool, VerifyThread, false, \ 2705 "Watch the thread register for corruption (SPARC only)") \ 2706 \ 2707 develop(bool, VerifyActivationFrameSize, false, \ 2708 "Verify that activation frame didn't become smaller than its " \ 2709 "minimal size") \ 2710 \ 2711 develop(bool, TraceFrequencyInlining, false, \ 2712 "Trace frequency based inlining") \ 2713 \ 2714 develop_pd(bool, InlineIntrinsics, \ 2715 "Inline intrinsics that can be statically resolved") \ 2716 \ 2717 product_pd(bool, ProfileInterpreter, \ 2718 "Profile at the bytecode level during interpretation") \ 2719 \ 2720 develop_pd(bool, ProfileTraps, \ 2721 "Profile deoptimization traps at the bytecode level") \ 2722 \ 2723 product(intx, ProfileMaturityPercentage, 20, \ 2724 "number of method invocations/branches (expressed as % of " \ 2725 "CompileThreshold) before using the method's profile") \ 2726 \ 2727 develop(bool, PrintMethodData, false, \ 2728 "Print the results of +ProfileInterpreter at end of run") \ 2729 \ 2730 develop(bool, VerifyDataPointer, trueInDebug, \ 2731 "Verify the method data pointer during interpreter profiling") \ 2732 \ 2733 develop(bool, VerifyCompiledCode, false, \ 2734 "Include miscellaneous runtime verifications in nmethod code; " \ 2735 "default off because it disturbs nmethod size heuristics") \ 2736 \ 2737 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2738 "Manually make GC thread crash then dump java stack trace; " \ 2739 "Test only") \ 2740 \ 2741 /* compilation */ \ 2742 product(bool, UseCompiler, true, \ 2743 "use compilation") \ 2744 \ 2745 develop(bool, TraceCompilationPolicy, false, \ 2746 "Trace compilation policy") \ 2747 \ 2748 develop(bool, TimeCompilationPolicy, false, \ 2749 "Time the compilation policy") \ 2750 \ 2751 product(bool, UseCounterDecay, true, \ 2752 "adjust recompilation counters") \ 2753 \ 2754 develop(intx, CounterHalfLifeTime, 30, \ 2755 "half-life time of invocation counters (in secs)") \ 2756 \ 2757 develop(intx, CounterDecayMinIntervalLength, 500, \ 2758 "Min. ms. between invocation of CounterDecay") \ 2759 \ 2760 product(bool, AlwaysCompileLoopMethods, false, \ 2761 "when using recompilation, never interpret methods " \ 2762 "containing loops") \ 2763 \ 2764 product(bool, DontCompileHugeMethods, true, \ 2765 "don't compile methods > HugeMethodLimit") \ 2766 \ 2767 /* Bytecode escape analysis estimation. */ \ 2768 product(bool, EstimateArgEscape, true, \ 2769 "Analyze bytecodes to estimate escape state of arguments") \ 2770 \ 2771 product(intx, BCEATraceLevel, 0, \ 2772 "How much tracing to do of bytecode escape analysis estimates") \ 2773 \ 2774 product(intx, MaxBCEAEstimateLevel, 5, \ 2775 "Maximum number of nested calls that are analyzed by BC EA.") \ 2776 \ 2777 product(intx, MaxBCEAEstimateSize, 150, \ 2778 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2779 \ 2780 product(intx, AllocatePrefetchStyle, 1, \ 2781 "0 = no prefetch, " \ 2782 "1 = prefetch instructions for each allocation, " \ 2783 "2 = use TLAB watermark to gate allocation prefetch, " \ 2784 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2785 \ 2786 product(intx, AllocatePrefetchDistance, -1, \ 2787 "Distance to prefetch ahead of allocation pointer") \ 2788 \ 2789 product(intx, AllocatePrefetchLines, 3, \ 2790 "Number of lines to prefetch ahead of array allocation pointer") \ 2791 \ 2792 product(intx, AllocateInstancePrefetchLines, 1, \ 2793 "Number of lines to prefetch ahead of instance allocation pointer") \ 2794 \ 2795 product(intx, AllocatePrefetchStepSize, 16, \ 2796 "Step size in bytes of sequential prefetch instructions") \ 2797 \ 2798 product(intx, AllocatePrefetchInstr, 0, \ 2799 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2800 \ 2801 /* deoptimization */ \ 2802 develop(bool, TraceDeoptimization, false, \ 2803 "Trace deoptimization") \ 2804 \ 2805 develop(bool, DebugDeoptimization, false, \ 2806 "Tracing various information while debugging deoptimization") \ 2807 \ 2808 product(intx, SelfDestructTimer, 0, \ 2809 "Will cause VM to terminate after a given time (in minutes) " \ 2810 "(0 means off)") \ 2811 \ 2812 product(intx, MaxJavaStackTraceDepth, 1024, \ 2813 "Max. no. of lines in the stack trace for Java exceptions " \ 2814 "(0 means all)") \ 2815 \ 2816 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2817 "Guarantee a safepoint (at least) every so many milliseconds " \ 2818 "(0 means none)")) \ 2819 \ 2820 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2821 "Guarantee a safepoint (at least) every so many milliseconds " \ 2822 "(0 means none)")) \ 2823 \ 2824 product(intx, SafepointTimeoutDelay, 10000, \ 2825 "Delay in milliseconds for option SafepointTimeout") \ 2826 \ 2827 product(intx, NmethodSweepFraction, 16, \ 2828 "Number of invocations of sweeper to cover all nmethods") \ 2829 \ 2830 product(intx, NmethodSweepCheckInterval, 5, \ 2831 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2832 \ 2833 notproduct(bool, LogSweeper, false, \ 2834 "Keep a ring buffer of sweeper activity") \ 2835 \ 2836 notproduct(intx, SweeperLogEntries, 1024, \ 2837 "Number of records in the ring buffer of sweeper activity") \ 2838 \ 2839 notproduct(intx, MemProfilingInterval, 500, \ 2840 "Time between each invocation of the MemProfiler") \ 2841 \ 2842 develop(intx, MallocCatchPtr, -1, \ 2843 "Hit breakpoint when mallocing/freeing this pointer") \ 2844 \ 2845 notproduct(intx, AssertRepeat, 1, \ 2846 "number of times to evaluate expression in assert " \ 2847 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2848 \ 2849 notproduct(ccstrlist, SuppressErrorAt, "", \ 2850 "List of assertions (file:line) to muzzle") \ 2851 \ 2852 notproduct(uintx, HandleAllocationLimit, 1024, \ 2853 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2854 "is used") \ 2855 \ 2856 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2857 "Threshold for total handle allocation when " \ 2858 "+TraceHandleAllocation is used") \ 2859 \ 2860 develop(intx, StackPrintLimit, 100, \ 2861 "number of stack frames to print in VM-level stack dump") \ 2862 \ 2863 notproduct(intx, MaxElementPrintSize, 256, \ 2864 "maximum number of elements to print") \ 2865 \ 2866 notproduct(intx, MaxSubklassPrintSize, 4, \ 2867 "maximum number of subklasses to print when printing klass") \ 2868 \ 2869 product(intx, MaxInlineLevel, 9, \ 2870 "maximum number of nested calls that are inlined") \ 2871 \ 2872 product(intx, MaxRecursiveInlineLevel, 1, \ 2873 "maximum number of nested recursive calls that are inlined") \ 2874 \ 2875 product_pd(intx, InlineSmallCode, \ 2876 "Only inline already compiled methods if their code size is " \ 2877 "less than this") \ 2878 \ 2879 product(intx, MaxInlineSize, 35, \ 2880 "maximum bytecode size of a method to be inlined") \ 2881 \ 2882 product_pd(intx, FreqInlineSize, \ 2883 "maximum bytecode size of a frequent method to be inlined") \ 2884 \ 2885 product(intx, MaxTrivialSize, 6, \ 2886 "maximum bytecode size of a trivial method to be inlined") \ 2887 \ 2888 product(intx, MinInliningThreshold, 250, \ 2889 "min. invocation count a method needs to have to be inlined") \ 2890 \ 2891 develop(intx, MethodHistogramCutoff, 100, \ 2892 "cutoff value for method invoc. histogram (+CountCalls)") \ 2893 \ 2894 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2895 "# of interpreted methods to show in profile") \ 2896 \ 2897 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2898 "# of compiled methods to show in profile") \ 2899 \ 2900 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2901 "# of stub methods to show in profile") \ 2902 \ 2903 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2904 "# of runtime stub nodes to show in profile") \ 2905 \ 2906 product(intx, ProfileIntervalsTicks, 100, \ 2907 "# of ticks between printing of interval profile " \ 2908 "(+ProfileIntervals)") \ 2909 \ 2910 notproduct(intx, ScavengeALotInterval, 1, \ 2911 "Interval between which scavenge will occur with +ScavengeALot") \ 2912 \ 2913 notproduct(intx, FullGCALotInterval, 1, \ 2914 "Interval between which full gc will occur with +FullGCALot") \ 2915 \ 2916 notproduct(intx, FullGCALotStart, 0, \ 2917 "For which invocation to start FullGCAlot") \ 2918 \ 2919 notproduct(intx, FullGCALotDummies, 32*K, \ 2920 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2921 "to move") \ 2922 \ 2923 develop(intx, DontYieldALotInterval, 10, \ 2924 "Interval between which yields will be dropped (milliseconds)") \ 2925 \ 2926 develop(intx, MinSleepInterval, 1, \ 2927 "Minimum sleep() interval (milliseconds) when " \ 2928 "ConvertSleepToYield is off (used for SOLARIS)") \ 2929 \ 2930 develop(intx, ProfilerPCTickThreshold, 15, \ 2931 "Number of ticks in a PC buckets to be a hotspot") \ 2932 \ 2933 notproduct(intx, DeoptimizeALotInterval, 5, \ 2934 "Number of exits until DeoptimizeALot kicks in") \ 2935 \ 2936 notproduct(intx, ZombieALotInterval, 5, \ 2937 "Number of exits until ZombieALot kicks in") \ 2938 \ 2939 develop(bool, StressNonEntrant, false, \ 2940 "Mark nmethods non-entrant at registration") \ 2941 \ 2942 diagnostic(intx, MallocVerifyInterval, 0, \ 2943 "if non-zero, verify C heap after every N calls to " \ 2944 "malloc/realloc/free") \ 2945 \ 2946 diagnostic(intx, MallocVerifyStart, 0, \ 2947 "if non-zero, start verifying C heap after Nth call to " \ 2948 "malloc/realloc/free") \ 2949 \ 2950 diagnostic(uintx, MallocMaxTestWords, 0, \ 2951 "if non-zero, max # of Words that malloc/realloc can allocate " \ 2952 "(for testing only)") \ 2953 \ 2954 product(intx, TypeProfileWidth, 2, \ 2955 "number of receiver types to record in call/cast profile") \ 2956 \ 2957 develop(intx, BciProfileWidth, 2, \ 2958 "number of return bci's to record in ret profile") \ 2959 \ 2960 product(intx, PerMethodRecompilationCutoff, 400, \ 2961 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2962 \ 2963 product(intx, PerBytecodeRecompilationCutoff, 200, \ 2964 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2965 \ 2966 product(intx, PerMethodTrapLimit, 100, \ 2967 "Limit on traps (of one kind) in a method (includes inlines)") \ 2968 \ 2969 product(intx, PerBytecodeTrapLimit, 4, \ 2970 "Limit on traps (of one kind) at a particular BCI") \ 2971 \ 2972 develop(intx, InlineFrequencyRatio, 20, \ 2973 "Ratio of call site execution to caller method invocation") \ 2974 \ 2975 develop_pd(intx, InlineFrequencyCount, \ 2976 "Count of call site execution necessary to trigger frequent " \ 2977 "inlining") \ 2978 \ 2979 develop(intx, InlineThrowCount, 50, \ 2980 "Force inlining of interpreted methods that throw this often") \ 2981 \ 2982 develop(intx, InlineThrowMaxSize, 200, \ 2983 "Force inlining of throwing methods smaller than this") \ 2984 \ 2985 develop(intx, ProfilerNodeSize, 1024, \ 2986 "Size in K to allocate for the Profile Nodes of each thread") \ 2987 \ 2988 product_pd(intx, PreInflateSpin, \ 2989 "Number of times to spin wait before inflation") \ 2990 \ 2991 /* gc parameters */ \ 2992 product(uintx, InitialHeapSize, 0, \ 2993 "Initial heap size (in bytes); zero means use ergonomics") \ 2994 \ 2995 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 2996 "Maximum heap size (in bytes)") \ 2997 \ 2998 product(uintx, OldSize, ScaleForWordSize(4*M), \ 2999 "Initial tenured generation size (in bytes)") \ 3000 \ 3001 product(uintx, NewSize, ScaleForWordSize(1*M), \ 3002 "Initial new generation size (in bytes)") \ 3003 \ 3004 product(uintx, MaxNewSize, max_uintx, \ 3005 "Maximum new generation size (in bytes), max_uintx means set " \ 3006 "ergonomically") \ 3007 \ 3008 product(uintx, PretenureSizeThreshold, 0, \ 3009 "Maximum size in bytes of objects allocated in DefNew " \ 3010 "generation; zero means no maximum") \ 3011 \ 3012 product(uintx, TLABSize, 0, \ 3013 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3014 \ 3015 product(uintx, MinTLABSize, 2*K, \ 3016 "Minimum allowed TLAB size (in bytes)") \ 3017 \ 3018 product(uintx, TLABAllocationWeight, 35, \ 3019 "Allocation averaging weight") \ 3020 \ 3021 product(uintx, TLABWasteTargetPercent, 1, \ 3022 "Percentage of Eden that can be wasted") \ 3023 \ 3024 product(uintx, TLABRefillWasteFraction, 64, \ 3025 "Max TLAB waste at a refill (internal fragmentation)") \ 3026 \ 3027 product(uintx, TLABWasteIncrement, 4, \ 3028 "Increment allowed waste at slow allocation") \ 3029 \ 3030 product(uintx, SurvivorRatio, 8, \ 3031 "Ratio of eden/survivor space size") \ 3032 \ 3033 product(uintx, NewRatio, 2, \ 3034 "Ratio of new/old generation sizes") \ 3035 \ 3036 product_pd(uintx, NewSizeThreadIncrease, \ 3037 "Additional size added to desired new generation size per " \ 3038 "non-daemon thread (in bytes)") \ 3039 \ 3040 product_pd(uintx, MetaspaceSize, \ 3041 "Initial size of Metaspaces (in bytes)") \ 3042 \ 3043 product(uintx, MaxMetaspaceSize, max_uintx, \ 3044 "Maximum size of Metaspaces (in bytes)") \ 3045 \ 3046 product(uintx, ClassMetaspaceSize, 2*M, \ 3047 "Maximum size of InstanceKlass area in Metaspace used for " \ 3048 "UseCompressedKlassPointers") \ 3049 \ 3050 product(uintx, MinHeapFreeRatio, 40, \ 3051 "Min percentage of heap free after GC to avoid expansion") \ 3052 \ 3053 product(uintx, MaxHeapFreeRatio, 70, \ 3054 "Max percentage of heap free after GC to avoid shrinking") \ 3055 \ 3056 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3057 "Number of milliseconds per MB of free space in the heap") \ 3058 \ 3059 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3060 "Min change in heap space due to GC (in bytes)") \ 3061 \ 3062 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3063 "Min expansion of Metaspace (in bytes)") \ 3064 \ 3065 product(uintx, MinMetaspaceFreeRatio, 40, \ 3066 "Min percentage of Metaspace free after GC to avoid expansion") \ 3067 \ 3068 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3069 "Max percentage of Metaspace free after GC to avoid shrinking") \ 3070 \ 3071 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3072 "Max expansion of Metaspace without full GC (in bytes)") \ 3073 \ 3074 product(uintx, QueuedAllocationWarningCount, 0, \ 3075 "Number of times an allocation that queues behind a GC " \ 3076 "will retry before printing a warning") \ 3077 \ 3078 diagnostic(uintx, VerifyGCStartAt, 0, \ 3079 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3080 \ 3081 diagnostic(intx, VerifyGCLevel, 0, \ 3082 "Generation level at which to start +VerifyBefore/AfterGC") \ 3083 \ 3084 product(uintx, MaxTenuringThreshold, 15, \ 3085 "Maximum value for tenuring threshold") \ 3086 \ 3087 product(uintx, InitialTenuringThreshold, 7, \ 3088 "Initial value for tenuring threshold") \ 3089 \ 3090 product(uintx, TargetSurvivorRatio, 50, \ 3091 "Desired percentage of survivor space used after scavenge") \ 3092 \ 3093 product(uintx, MarkSweepDeadRatio, 5, \ 3094 "Percentage (0-100) of the old gen allowed as dead wood." \ 3095 "Serial mark sweep treats this as both the min and max value." \ 3096 "CMS uses this value only if it falls back to mark sweep." \ 3097 "Par compact uses a variable scale based on the density of the" \ 3098 "generation and treats this as the max value when the heap is" \ 3099 "either completely full or completely empty. Par compact also" \ 3100 "has a smaller default value; see arguments.cpp.") \ 3101 \ 3102 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3103 "How often should we fully compact the heap (ignoring the dead " \ 3104 "space parameters)") \ 3105 \ 3106 product(intx, PrintCMSStatistics, 0, \ 3107 "Statistics for CMS") \ 3108 \ 3109 product(bool, PrintCMSInitiationStatistics, false, \ 3110 "Statistics for initiating a CMS collection") \ 3111 \ 3112 product(intx, PrintFLSStatistics, 0, \ 3113 "Statistics for CMS' FreeListSpace") \ 3114 \ 3115 product(intx, PrintFLSCensus, 0, \ 3116 "Census for CMS' FreeListSpace") \ 3117 \ 3118 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3119 "Delay in ms between expansion and allocation") \ 3120 \ 3121 develop(uintx, GCWorkerDelayMillis, 0, \ 3122 "Delay in ms in scheduling GC workers") \ 3123 \ 3124 product(intx, DeferThrSuspendLoopCount, 4000, \ 3125 "(Unstable) Number of times to iterate in safepoint loop " \ 3126 " before blocking VM threads ") \ 3127 \ 3128 product(intx, DeferPollingPageLoopCount, -1, \ 3129 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3130 "before changing safepoint polling page to RO ") \ 3131 \ 3132 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3133 \ 3134 product(bool, PSChunkLargeArrays, true, \ 3135 "true: process large arrays in chunks") \ 3136 \ 3137 product(uintx, GCDrainStackTargetSize, 64, \ 3138 "how many entries we'll try to leave on the stack during " \ 3139 "parallel GC") \ 3140 \ 3141 /* stack parameters */ \ 3142 product_pd(intx, StackYellowPages, \ 3143 "Number of yellow zone (recoverable overflows) pages") \ 3144 \ 3145 product_pd(intx, StackRedPages, \ 3146 "Number of red zone (unrecoverable overflows) pages") \ 3147 \ 3148 product_pd(intx, StackShadowPages, \ 3149 "Number of shadow zone (for overflow checking) pages" \ 3150 " this should exceed the depth of the VM and native call stack") \ 3151 \ 3152 product_pd(intx, ThreadStackSize, \ 3153 "Thread Stack Size (in Kbytes)") \ 3154 \ 3155 product_pd(intx, VMThreadStackSize, \ 3156 "Non-Java Thread Stack Size (in Kbytes)") \ 3157 \ 3158 product_pd(intx, CompilerThreadStackSize, \ 3159 "Compiler Thread Stack Size (in Kbytes)") \ 3160 \ 3161 develop_pd(uintx, JVMInvokeMethodSlack, \ 3162 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3163 \ 3164 product(uintx, ThreadSafetyMargin, 50*M, \ 3165 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3166 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3167 "disable this feature") \ 3168 \ 3169 /* code cache parameters */ \ 3170 develop(uintx, CodeCacheSegmentSize, 64, \ 3171 "Code cache segment size (in bytes) - smallest unit of " \ 3172 "allocation") \ 3173 \ 3174 develop_pd(intx, CodeEntryAlignment, \ 3175 "Code entry alignment for generated code (in bytes)") \ 3176 \ 3177 product_pd(intx, OptoLoopAlignment, \ 3178 "Align inner loops to zero relative to this modulus") \ 3179 \ 3180 product_pd(uintx, InitialCodeCacheSize, \ 3181 "Initial code cache size (in bytes)") \ 3182 \ 3183 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3184 "Minimum code cache size (in bytes) required to start VM.") \ 3185 \ 3186 product_pd(uintx, ReservedCodeCacheSize, \ 3187 "Reserved code cache size (in bytes) - maximum code cache size") \ 3188 \ 3189 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3190 "When less than X space left, we stop compiling.") \ 3191 \ 3192 product_pd(uintx, CodeCacheExpansionSize, \ 3193 "Code cache expansion size (in bytes)") \ 3194 \ 3195 develop_pd(uintx, CodeCacheMinBlockLength, \ 3196 "Minimum number of segments in a code cache block.") \ 3197 \ 3198 notproduct(bool, ExitOnFullCodeCache, false, \ 3199 "Exit the VM if we fill the code cache.") \ 3200 \ 3201 product(bool, UseCodeCacheFlushing, true, \ 3202 "Attempt to clean the code cache before shutting off compiler") \ 3203 \ 3204 product(intx, MinCodeCacheFlushingInterval, 30, \ 3205 "Min number of seconds between code cache cleaning sessions") \ 3206 \ 3207 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3208 "When less than X space left, start code cache cleaning") \ 3209 \ 3210 product(uintx, CodeCacheFlushingFraction, 2, \ 3211 "Fraction of the code cache that is flushed when full") \ 3212 \ 3213 /* interpreter debugging */ \ 3214 develop(intx, BinarySwitchThreshold, 5, \ 3215 "Minimal number of lookupswitch entries for rewriting to binary " \ 3216 "switch") \ 3217 \ 3218 develop(intx, StopInterpreterAt, 0, \ 3219 "Stops interpreter execution at specified bytecode number") \ 3220 \ 3221 develop(intx, TraceBytecodesAt, 0, \ 3222 "Traces bytecodes starting with specified bytecode number") \ 3223 \ 3224 /* compiler interface */ \ 3225 develop(intx, CIStart, 0, \ 3226 "the id of the first compilation to permit") \ 3227 \ 3228 develop(intx, CIStop, -1, \ 3229 "the id of the last compilation to permit") \ 3230 \ 3231 develop(intx, CIStartOSR, 0, \ 3232 "the id of the first osr compilation to permit " \ 3233 "(CICountOSR must be on)") \ 3234 \ 3235 develop(intx, CIStopOSR, -1, \ 3236 "the id of the last osr compilation to permit " \ 3237 "(CICountOSR must be on)") \ 3238 \ 3239 develop(intx, CIBreakAtOSR, -1, \ 3240 "id of osr compilation to break at") \ 3241 \ 3242 develop(intx, CIBreakAt, -1, \ 3243 "id of compilation to break at") \ 3244 \ 3245 product(ccstrlist, CompileOnly, "", \ 3246 "List of methods (pkg/class.name) to restrict compilation to") \ 3247 \ 3248 product(ccstr, CompileCommandFile, NULL, \ 3249 "Read compiler commands from this file [.hotspot_compiler]") \ 3250 \ 3251 product(ccstrlist, CompileCommand, "", \ 3252 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3253 \ 3254 develop(bool, ReplayCompiles, false, \ 3255 "Enable replay of compilations from ReplayDataFile") \ 3256 \ 3257 product(ccstr, ReplayDataFile, NULL, \ 3258 "File containing compilation replay information" \ 3259 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3260 \ 3261 develop(intx, ReplaySuppressInitializers, 2, \ 3262 "Controls handling of class initialization during replay" \ 3263 "0 - don't do anything special" \ 3264 "1 - treat all class initializers as empty" \ 3265 "2 - treat class initializers for application classes as empty" \ 3266 "3 - allow all class initializers to run during bootstrap but" \ 3267 " pretend they are empty after starting replay") \ 3268 \ 3269 develop(bool, ReplayIgnoreInitErrors, false, \ 3270 "Ignore exceptions thrown during initialization for replay") \ 3271 \ 3272 product(bool, DumpReplayDataOnError, true, \ 3273 "Record replay data for crashing compiler threads") \ 3274 \ 3275 product(bool, CICompilerCountPerCPU, false, \ 3276 "1 compiler thread for log(N CPUs)") \ 3277 \ 3278 develop(intx, CIFireOOMAt, -1, \ 3279 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3280 "(non-negative value throws OOM after this many CI accesses " \ 3281 "in each compile)") \ 3282 notproduct(intx, CICrashAt, -1, \ 3283 "id of compilation to trigger assert in compiler thread for " \ 3284 "the purpose of testing, e.g. generation of replay data") \ 3285 notproduct(bool, CIObjectFactoryVerify, false, \ 3286 "enable potentially expensive verification in ciObjectFactory") \ 3287 \ 3288 /* Priorities */ \ 3289 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3290 \ 3291 product(intx, ThreadPriorityPolicy, 0, \ 3292 "0 : Normal. "\ 3293 " VM chooses priorities that are appropriate for normal "\ 3294 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3295 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3296 " map to lower native priority values. On Windows applications"\ 3297 " are allowed to use higher native priorities. However, with "\ 3298 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3299 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3300 " interfere with system threads. On Linux thread priorities "\ 3301 " are ignored because the OS does not support static priority "\ 3302 " in SCHED_OTHER scheduling class which is the only choice for"\ 3303 " non-root, non-realtime applications. "\ 3304 "1 : Aggressive. "\ 3305 " Java thread priorities map over to the entire range of "\ 3306 " native thread priorities. Higher Java thread priorities map "\ 3307 " to higher native thread priorities. This policy should be "\ 3308 " used with care, as sometimes it can cause performance "\ 3309 " degradation in the application and/or the entire system. On "\ 3310 " Linux this policy requires root privilege.") \ 3311 \ 3312 product(bool, ThreadPriorityVerbose, false, \ 3313 "Print priority changes") \ 3314 \ 3315 product(intx, DefaultThreadPriority, -1, \ 3316 "The native priority at which threads run if not elsewhere " \ 3317 "specified (-1 means no change)") \ 3318 \ 3319 product(intx, CompilerThreadPriority, -1, \ 3320 "The native priority at which compiler threads should run " \ 3321 "(-1 means no change)") \ 3322 \ 3323 product(intx, VMThreadPriority, -1, \ 3324 "The native priority at which the VM thread should run " \ 3325 "(-1 means no change)") \ 3326 \ 3327 product(bool, CompilerThreadHintNoPreempt, true, \ 3328 "(Solaris only) Give compiler threads an extra quanta") \ 3329 \ 3330 product(bool, VMThreadHintNoPreempt, false, \ 3331 "(Solaris only) Give VM thread an extra quanta") \ 3332 \ 3333 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3334 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3335 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3336 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3337 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3338 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3339 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3340 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3341 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3342 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3343 \ 3344 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3345 "Java thread priority 10 maps to critical scheduling priority") \ 3346 \ 3347 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3348 "Compiler thread(s) run at critical scheduling priority") \ 3349 \ 3350 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3351 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3352 \ 3353 /* compiler debugging */ \ 3354 notproduct(intx, CompileTheWorldStartAt, 1, \ 3355 "First class to consider when using +CompileTheWorld") \ 3356 \ 3357 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3358 "Last class to consider when using +CompileTheWorld") \ 3359 \ 3360 develop(intx, NewCodeParameter, 0, \ 3361 "Testing Only: Create a dedicated integer parameter before " \ 3362 "putback") \ 3363 \ 3364 /* new oopmap storage allocation */ \ 3365 develop(intx, MinOopMapAllocation, 8, \ 3366 "Minimum number of OopMap entries in an OopMapSet") \ 3367 \ 3368 /* Background Compilation */ \ 3369 develop(intx, LongCompileThreshold, 50, \ 3370 "Used with +TraceLongCompiles") \ 3371 \ 3372 product(intx, StarvationMonitorInterval, 200, \ 3373 "Pause between each check in ms") \ 3374 \ 3375 /* recompilation */ \ 3376 product_pd(intx, CompileThreshold, \ 3377 "number of interpreted method invocations before (re-)compiling") \ 3378 \ 3379 product_pd(intx, BackEdgeThreshold, \ 3380 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3381 \ 3382 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3383 "Interpreter (tier 0) invocation notification frequency.") \ 3384 \ 3385 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3386 "C1 without MDO (tier 2) invocation notification frequency.") \ 3387 \ 3388 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3389 "C1 with MDO profiling (tier 3) invocation notification " \ 3390 "frequency.") \ 3391 \ 3392 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3393 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3394 \ 3395 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3396 "Interpreter (tier 0) invocation notification frequency.") \ 3397 \ 3398 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3399 "C1 without MDO (tier 2) invocation notification frequency.") \ 3400 \ 3401 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3402 "C1 with MDO profiling (tier 3) invocation notification " \ 3403 "frequency.") \ 3404 \ 3405 product(intx, Tier2CompileThreshold, 0, \ 3406 "threshold at which tier 2 compilation is invoked") \ 3407 \ 3408 product(intx, Tier2BackEdgeThreshold, 0, \ 3409 "Back edge threshold at which tier 2 compilation is invoked") \ 3410 \ 3411 product(intx, Tier3InvocationThreshold, 200, \ 3412 "Compile if number of method invocations crosses this " \ 3413 "threshold") \ 3414 \ 3415 product(intx, Tier3MinInvocationThreshold, 100, \ 3416 "Minimum invocation to compile at tier 3") \ 3417 \ 3418 product(intx, Tier3CompileThreshold, 2000, \ 3419 "Threshold at which tier 3 compilation is invoked (invocation " \ 3420 "minimum must be satisfied.") \ 3421 \ 3422 product(intx, Tier3BackEdgeThreshold, 60000, \ 3423 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3424 \ 3425 product(intx, Tier4InvocationThreshold, 5000, \ 3426 "Compile if number of method invocations crosses this " \ 3427 "threshold") \ 3428 \ 3429 product(intx, Tier4MinInvocationThreshold, 600, \ 3430 "Minimum invocation to compile at tier 4") \ 3431 \ 3432 product(intx, Tier4CompileThreshold, 15000, \ 3433 "Threshold at which tier 4 compilation is invoked (invocation " \ 3434 "minimum must be satisfied.") \ 3435 \ 3436 product(intx, Tier4BackEdgeThreshold, 40000, \ 3437 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3438 \ 3439 product(intx, Tier3DelayOn, 5, \ 3440 "If C2 queue size grows over this amount per compiler thread " \ 3441 "stop compiling at tier 3 and start compiling at tier 2") \ 3442 \ 3443 product(intx, Tier3DelayOff, 2, \ 3444 "If C2 queue size is less than this amount per compiler thread " \ 3445 "allow methods compiled at tier 2 transition to tier 3") \ 3446 \ 3447 product(intx, Tier3LoadFeedback, 5, \ 3448 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3449 "reaches this amount per compiler thread") \ 3450 \ 3451 product(intx, Tier4LoadFeedback, 3, \ 3452 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3453 "reaches this amount per compiler thread") \ 3454 \ 3455 product(intx, TieredCompileTaskTimeout, 50, \ 3456 "Kill compile task if method was not used within " \ 3457 "given timeout in milliseconds") \ 3458 \ 3459 product(intx, TieredStopAtLevel, 4, \ 3460 "Stop at given compilation level") \ 3461 \ 3462 product(intx, Tier0ProfilingStartPercentage, 200, \ 3463 "Start profiling in interpreter if the counters exceed tier 3" \ 3464 "thresholds by the specified percentage") \ 3465 \ 3466 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3467 "Increase the compile threshold for C1 compilation if the code" \ 3468 "cache is filled by the specified percentage.") \ 3469 \ 3470 product(intx, TieredRateUpdateMinTime, 1, \ 3471 "Minimum rate sampling interval (in milliseconds)") \ 3472 \ 3473 product(intx, TieredRateUpdateMaxTime, 25, \ 3474 "Maximum rate sampling interval (in milliseconds)") \ 3475 \ 3476 product_pd(bool, TieredCompilation, \ 3477 "Enable tiered compilation") \ 3478 \ 3479 product(bool, PrintTieredEvents, false, \ 3480 "Print tiered events notifications") \ 3481 \ 3482 product_pd(intx, OnStackReplacePercentage, \ 3483 "NON_TIERED number of method invocations/branches (expressed as %"\ 3484 "of CompileThreshold) before (re-)compiling OSR code") \ 3485 \ 3486 product(intx, InterpreterProfilePercentage, 33, \ 3487 "NON_TIERED number of method invocations/branches (expressed as %"\ 3488 "of CompileThreshold) before profiling in the interpreter") \ 3489 \ 3490 develop(intx, MaxRecompilationSearchLength, 10, \ 3491 "max. # frames to inspect searching for recompilee") \ 3492 \ 3493 develop(intx, MaxInterpretedSearchLength, 3, \ 3494 "max. # interp. frames to skip when searching for recompilee") \ 3495 \ 3496 develop(intx, DesiredMethodLimit, 8000, \ 3497 "desired max. method size (in bytecodes) after inlining") \ 3498 \ 3499 develop(intx, HugeMethodLimit, 8000, \ 3500 "don't compile methods larger than this if " \ 3501 "+DontCompileHugeMethods") \ 3502 \ 3503 /* New JDK 1.4 reflection implementation */ \ 3504 \ 3505 develop(bool, UseNewReflection, true, \ 3506 "Temporary flag for transition to reflection based on dynamic " \ 3507 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3508 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3509 "changes were needed") \ 3510 \ 3511 develop(bool, VerifyReflectionBytecodes, false, \ 3512 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3513 "in situations like that described in 4486457 or for " \ 3514 "constructors generated for serialization, so can not be enabled "\ 3515 "in product.") \ 3516 \ 3517 product(bool, ReflectionWrapResolutionErrors, true, \ 3518 "Temporary flag for transition to AbstractMethodError wrapped " \ 3519 "in InvocationTargetException. See 6531596") \ 3520 \ 3521 \ 3522 develop(intx, FastSuperclassLimit, 8, \ 3523 "Depth of hardwired instanceof accelerator array") \ 3524 \ 3525 /* Properties for Java libraries */ \ 3526 \ 3527 product(uintx, MaxDirectMemorySize, 0, \ 3528 "Maximum total size of NIO direct-buffer allocations") \ 3529 \ 3530 /* temporary developer defined flags */ \ 3531 \ 3532 diagnostic(bool, UseNewCode, false, \ 3533 "Testing Only: Use the new version while testing") \ 3534 \ 3535 diagnostic(bool, UseNewCode2, false, \ 3536 "Testing Only: Use the new version while testing") \ 3537 \ 3538 diagnostic(bool, UseNewCode3, false, \ 3539 "Testing Only: Use the new version while testing") \ 3540 \ 3541 /* flags for performance data collection */ \ 3542 \ 3543 product(bool, UsePerfData, falseInEmbedded, \ 3544 "Flag to disable jvmstat instrumentation for performance testing" \ 3545 "and problem isolation purposes.") \ 3546 \ 3547 product(bool, PerfDataSaveToFile, false, \ 3548 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3549 \ 3550 product(ccstr, PerfDataSaveFile, NULL, \ 3551 "Save PerfData memory to the specified absolute pathname," \ 3552 "%p in the file name if present will be replaced by pid") \ 3553 \ 3554 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3555 "Data sampling interval in milliseconds") \ 3556 \ 3557 develop(bool, PerfTraceDataCreation, false, \ 3558 "Trace creation of Performance Data Entries") \ 3559 \ 3560 develop(bool, PerfTraceMemOps, false, \ 3561 "Trace PerfMemory create/attach/detach calls") \ 3562 \ 3563 product(bool, PerfDisableSharedMem, false, \ 3564 "Store performance data in standard memory") \ 3565 \ 3566 product(intx, PerfDataMemorySize, 32*K, \ 3567 "Size of performance data memory region. Will be rounded " \ 3568 "up to a multiple of the native os page size.") \ 3569 \ 3570 product(intx, PerfMaxStringConstLength, 1024, \ 3571 "Maximum PerfStringConstant string length before truncation") \ 3572 \ 3573 product(bool, PerfAllowAtExitRegistration, false, \ 3574 "Allow registration of atexit() methods") \ 3575 \ 3576 product(bool, PerfBypassFileSystemCheck, false, \ 3577 "Bypass Win32 file system criteria checks (Windows Only)") \ 3578 \ 3579 product(intx, UnguardOnExecutionViolation, 0, \ 3580 "Unguard page and retry on no-execute fault (Win32 only)" \ 3581 "0=off, 1=conservative, 2=aggressive") \ 3582 \ 3583 /* Serviceability Support */ \ 3584 \ 3585 product(bool, ManagementServer, false, \ 3586 "Create JMX Management Server") \ 3587 \ 3588 product(bool, DisableAttachMechanism, false, \ 3589 "Disable mechanism that allows tools to attach to this VM") \ 3590 \ 3591 product(bool, StartAttachListener, false, \ 3592 "Always start Attach Listener at VM startup") \ 3593 \ 3594 manageable(bool, PrintConcurrentLocks, false, \ 3595 "Print java.util.concurrent locks in thread dump") \ 3596 \ 3597 product(bool, TransmitErrorReport, false, \ 3598 "Enable error report transmission on erroneous termination") \ 3599 \ 3600 product(ccstr, ErrorReportServer, NULL, \ 3601 "Override built-in error report server address") \ 3602 \ 3603 /* Shared spaces */ \ 3604 \ 3605 product(bool, UseSharedSpaces, true, \ 3606 "Use shared spaces for metadata") \ 3607 \ 3608 product(bool, RequireSharedSpaces, false, \ 3609 "Require shared spaces for metadata") \ 3610 \ 3611 product(bool, DumpSharedSpaces, false, \ 3612 "Special mode: JVM reads a class list, loads classes, builds " \ 3613 "shared spaces, and dumps the shared spaces to a file to be " \ 3614 "used in future JVM runs.") \ 3615 \ 3616 product(bool, PrintSharedSpaces, false, \ 3617 "Print usage of shared spaces") \ 3618 \ 3619 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3620 "Size of read-write space for metadata (in bytes)") \ 3621 \ 3622 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3623 "Size of read-only space for metadata (in bytes)") \ 3624 \ 3625 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3626 "Size of the shared miscellaneous data area (in bytes)") \ 3627 \ 3628 product(uintx, SharedMiscCodeSize, 120*K, \ 3629 "Size of the shared miscellaneous code area (in bytes)") \ 3630 \ 3631 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \ 3632 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 3633 "Address to allocate shared memory region for class data") \ 3634 \ 3635 diagnostic(bool, EnableInvokeDynamic, true, \ 3636 "support JSR 292 (method handles, invokedynamic, " \ 3637 "anonymous classes") \ 3638 \ 3639 diagnostic(bool, PrintMethodHandleStubs, false, \ 3640 "Print generated stub code for method handles") \ 3641 \ 3642 develop(bool, TraceMethodHandles, false, \ 3643 "trace internal method handle operations") \ 3644 \ 3645 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3646 "perform extra checks when constructing method handles") \ 3647 \ 3648 diagnostic(bool, ShowHiddenFrames, false, \ 3649 "show method handle implementation frames (usually hidden)") \ 3650 \ 3651 experimental(bool, TrustFinalNonStaticFields, false, \ 3652 "trust final non-static declarations for constant folding") \ 3653 \ 3654 develop(bool, TraceInvokeDynamic, false, \ 3655 "trace internal invoke dynamic operations") \ 3656 \ 3657 diagnostic(bool, PauseAtStartup, false, \ 3658 "Causes the VM to pause at startup time and wait for the pause " \ 3659 "file to be removed (default: ./vm.paused.<pid>)") \ 3660 \ 3661 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3662 "The file to create and for whose removal to await when pausing " \ 3663 "at startup. (default: ./vm.paused.<pid>)") \ 3664 \ 3665 diagnostic(bool, PauseAtExit, false, \ 3666 "Pause and wait for keypress on exit if a debugger is attached") \ 3667 \ 3668 product(bool, ExtendedDTraceProbes, false, \ 3669 "Enable performance-impacting dtrace probes") \ 3670 \ 3671 product(bool, DTraceMethodProbes, false, \ 3672 "Enable dtrace probes for method-entry and method-exit") \ 3673 \ 3674 product(bool, DTraceAllocProbes, false, \ 3675 "Enable dtrace probes for object allocation") \ 3676 \ 3677 product(bool, DTraceMonitorProbes, false, \ 3678 "Enable dtrace probes for monitor events") \ 3679 \ 3680 product(bool, RelaxAccessControlCheck, false, \ 3681 "Relax the access control checks in the verifier") \ 3682 \ 3683 diagnostic(bool, PrintDTraceDOF, false, \ 3684 "Print the DTrace DOF passed to the system for JSDT probes") \ 3685 \ 3686 product(uintx, StringTableSize, defaultStringTableSize, \ 3687 "Number of buckets in the interned String table") \ 3688 \ 3689 develop(bool, TraceDefaultMethods, false, \ 3690 "Trace the default method processing steps") \ 3691 \ 3692 develop(bool, ParseAllGenericSignatures, false, \ 3693 "Parse all generic signatures while classloading") \ 3694 \ 3695 develop(bool, VerifyGenericSignatures, false, \ 3696 "Abort VM on erroneous or inconsistent generic signatures") \ 3697 \ 3698 product(bool, ParseGenericDefaults, false, \ 3699 "Parse generic signatures for default method handling") \ 3700 \ 3701 product(bool, UseVMInterruptibleIO, false, \ 3702 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3703 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3704 " of this flag is true for JDK 6 and earlier") \ 3705 \ 3706 diagnostic(bool, WhiteBoxAPI, false, \ 3707 "Enable internal testing APIs") \ 3708 \ 3709 product(bool, PrintGCCause, true, \ 3710 "Include GC cause in GC logging") \ 3711 \ 3712 product(bool , AllowNonVirtualCalls, false, \ 3713 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 3714 \ 3715 diagnostic(ccstr, SharedArchiveFile, NULL, \ 3716 "Override the default location of the CDS archive file") \ 3717 \ 3718 experimental(uintx, ArrayAllocatorMallocLimit, \ 3719 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \ 3720 "Allocation less than this value will be allocated " \ 3721 "using malloc. Larger allocations will use mmap.") \ 3722 \ 3723 product(bool, EnableTracing, false, \ 3724 "Enable event-based tracing") \ 3725 product(bool, UseLockedTracing, false, \ 3726 "Use locked-tracing when doing event-based tracing") 3727 3728 3729 /* 3730 * Macros for factoring of globals 3731 */ 3732 3733 // Interface macros 3734 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3735 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3736 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3737 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3738 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3739 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3740 #ifdef PRODUCT 3741 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3742 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3743 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3744 #else 3745 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3746 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3747 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3748 #endif 3749 // Special LP64 flags, product only needed for now. 3750 #ifdef _LP64 3751 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3752 #else 3753 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3754 #endif // _LP64 3755 3756 // Implementation macros 3757 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3758 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3759 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3760 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3761 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3762 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3763 #ifdef PRODUCT 3764 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3765 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3766 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3767 #else 3768 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3769 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3770 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3771 #endif 3772 #ifdef _LP64 3773 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3774 #else 3775 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3776 #endif // _LP64 3777 3778 RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG) 3779 3780 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3781 3782 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG) 3783 3784 // Extensions 3785 3786 #include "runtime/globals_ext.hpp" 3787 3788 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP