rev 54096 : 8214526: Change CodeHeap State Analytics control from UL to Print*
Reviewed-by: coleenp, kvn, stuefe, thartmann

   1 /*
   2  * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
  26 #define SHARE_VM_RUNTIME_GLOBALS_HPP
  27 
  28 #include "gc/shared/gc_globals.hpp"
  29 #include "utilities/align.hpp"
  30 #include "utilities/globalDefinitions.hpp"
  31 #include "utilities/macros.hpp"
  32 
  33 #include <float.h> // for DBL_MAX
  34 
  35 // The larger HeapWordSize for 64bit requires larger heaps
  36 // for the same application running in 64bit.  See bug 4967770.
  37 // The minimum alignment to a heap word size is done.  Other
  38 // parts of the memory system may require additional alignment
  39 // and are responsible for those alignments.
  40 #ifdef _LP64
  41 #define ScaleForWordSize(x) align_down_((x) * 13 / 10, HeapWordSize)
  42 #else
  43 #define ScaleForWordSize(x) (x)
  44 #endif
  45 
  46 // use this for flags that are true per default in the tiered build
  47 // but false in non-tiered builds, and vice versa
  48 #ifdef TIERED
  49 #define  trueInTiered true
  50 #define falseInTiered false
  51 #else
  52 #define  trueInTiered false
  53 #define falseInTiered true
  54 #endif
  55 
  56 #include CPU_HEADER(globals)
  57 #include OS_HEADER(globals)
  58 #include OS_CPU_HEADER(globals)
  59 #ifdef COMPILER1
  60 #include CPU_HEADER(c1_globals)
  61 #include OS_HEADER(c1_globals)
  62 #endif
  63 #ifdef COMPILER2
  64 #include CPU_HEADER(c2_globals)
  65 #include OS_HEADER(c2_globals)
  66 #endif
  67 
  68 #if !defined(COMPILER1) && !defined(COMPILER2) && !INCLUDE_JVMCI
  69 define_pd_global(bool, BackgroundCompilation,        false);
  70 define_pd_global(bool, UseTLAB,                      false);
  71 define_pd_global(bool, CICompileOSR,                 false);
  72 define_pd_global(bool, UseTypeProfile,               false);
  73 define_pd_global(bool, UseOnStackReplacement,        false);
  74 define_pd_global(bool, InlineIntrinsics,             false);
  75 define_pd_global(bool, PreferInterpreterNativeStubs, true);
  76 define_pd_global(bool, ProfileInterpreter,           false);
  77 define_pd_global(bool, ProfileTraps,                 false);
  78 define_pd_global(bool, TieredCompilation,            false);
  79 
  80 define_pd_global(intx, CompileThreshold,             0);
  81 
  82 define_pd_global(intx,   OnStackReplacePercentage,   0);
  83 define_pd_global(bool,   ResizeTLAB,                 false);
  84 define_pd_global(intx,   FreqInlineSize,             0);
  85 define_pd_global(size_t, NewSizeThreadIncrease,      4*K);
  86 define_pd_global(bool,   InlineClassNatives,         true);
  87 define_pd_global(bool,   InlineUnsafeOps,            true);
  88 define_pd_global(uintx,  InitialCodeCacheSize,       160*K);
  89 define_pd_global(uintx,  ReservedCodeCacheSize,      32*M);
  90 define_pd_global(uintx,  NonProfiledCodeHeapSize,    0);
  91 define_pd_global(uintx,  ProfiledCodeHeapSize,       0);
  92 define_pd_global(uintx,  NonNMethodCodeHeapSize,     32*M);
  93 
  94 define_pd_global(uintx,  CodeCacheExpansionSize,     32*K);
  95 define_pd_global(uintx,  CodeCacheMinBlockLength,    1);
  96 define_pd_global(uintx,  CodeCacheMinimumUseSpace,   200*K);
  97 define_pd_global(size_t, MetaspaceSize,              ScaleForWordSize(4*M));
  98 define_pd_global(bool, NeverActAsServerClassMachine, true);
  99 define_pd_global(uint64_t,MaxRAM,                    1ULL*G);
 100 #define CI_COMPILER_COUNT 0
 101 #else
 102 
 103 #if COMPILER2_OR_JVMCI
 104 #define CI_COMPILER_COUNT 2
 105 #else
 106 #define CI_COMPILER_COUNT 1
 107 #endif // COMPILER2_OR_JVMCI
 108 
 109 #endif // no compilers
 110 
 111 // use this for flags that are true by default in the debug version but
 112 // false in the optimized version, and vice versa
 113 #ifdef ASSERT
 114 #define trueInDebug  true
 115 #define falseInDebug false
 116 #else
 117 #define trueInDebug  false
 118 #define falseInDebug true
 119 #endif
 120 
 121 // use this for flags that are true per default in the product build
 122 // but false in development builds, and vice versa
 123 #ifdef PRODUCT
 124 #define trueInProduct  true
 125 #define falseInProduct false
 126 #else
 127 #define trueInProduct  false
 128 #define falseInProduct true
 129 #endif
 130 
 131 // develop flags are settable / visible only during development and are constant in the PRODUCT version
 132 // product flags are always settable / visible
 133 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
 134 
 135 // A flag must be declared with one of the following types:
 136 // bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t.
 137 // The type "ccstr" is an alias for "const char*" and is used
 138 // only in this file, because the macrology requires single-token type names.
 139 
 140 // Note: Diagnostic options not meant for VM tuning or for product modes.
 141 // They are to be used for VM quality assurance or field diagnosis
 142 // of VM bugs.  They are hidden so that users will not be encouraged to
 143 // try them as if they were VM ordinary execution options.  However, they
 144 // are available in the product version of the VM.  Under instruction
 145 // from support engineers, VM customers can turn them on to collect
 146 // diagnostic information about VM problems.  To use a VM diagnostic
 147 // option, you must first specify +UnlockDiagnosticVMOptions.
 148 // (This master switch also affects the behavior of -Xprintflags.)
 149 //
 150 // experimental flags are in support of features that are not
 151 //    part of the officially supported product, but are available
 152 //    for experimenting with. They could, for example, be performance
 153 //    features that may not have undergone full or rigorous QA, but which may
 154 //    help performance in some cases and released for experimentation
 155 //    by the community of users and developers. This flag also allows one to
 156 //    be able to build a fully supported product that nonetheless also
 157 //    ships with some unsupported, lightly tested, experimental features.
 158 //    Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
 159 //    UnlockExperimentalVMOptions flag, which allows the control and
 160 //    modification of the experimental flags.
 161 //
 162 // Nota bene: neither diagnostic nor experimental options should be used casually,
 163 //    and they are not supported on production loads, except under explicit
 164 //    direction from support engineers.
 165 //
 166 // manageable flags are writeable external product flags.
 167 //    They are dynamically writeable through the JDK management interface
 168 //    (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
 169 //    These flags are external exported interface (see CCC).  The list of
 170 //    manageable flags can be queried programmatically through the management
 171 //    interface.
 172 //
 173 //    A flag can be made as "manageable" only if
 174 //    - the flag is defined in a CCC as an external exported interface.
 175 //    - the VM implementation supports dynamic setting of the flag.
 176 //      This implies that the VM must *always* query the flag variable
 177 //      and not reuse state related to the flag state at any given time.
 178 //    - you want the flag to be queried programmatically by the customers.
 179 //
 180 // product_rw flags are writeable internal product flags.
 181 //    They are like "manageable" flags but for internal/private use.
 182 //    The list of product_rw flags are internal/private flags which
 183 //    may be changed/removed in a future release.  It can be set
 184 //    through the management interface to get/set value
 185 //    when the name of flag is supplied.
 186 //
 187 //    A flag can be made as "product_rw" only if
 188 //    - the VM implementation supports dynamic setting of the flag.
 189 //      This implies that the VM must *always* query the flag variable
 190 //      and not reuse state related to the flag state at any given time.
 191 //
 192 // Note that when there is a need to support develop flags to be writeable,
 193 // it can be done in the same way as product_rw.
 194 //
 195 // range is a macro that will expand to min and max arguments for range
 196 //    checking code if provided - see jvmFlagRangeList.hpp
 197 //
 198 // constraint is a macro that will expand to custom function call
 199 //    for constraint checking if provided - see jvmFlagConstraintList.hpp
 200 //
 201 // writeable is a macro that controls if and how the value can change during the runtime
 202 //
 203 // writeable(Always) is optional and allows the flag to have its value changed
 204 //    without any limitations at any time
 205 //
 206 // writeable(Once) flag value's can be only set once during the lifetime of VM
 207 //
 208 // writeable(CommandLineOnly) flag value's can be only set from command line
 209 //    (multiple times allowed)
 210 //
 211 
 212 
 213 #define RUNTIME_FLAGS(develop, \
 214                       develop_pd, \
 215                       product, \
 216                       product_pd, \
 217                       diagnostic, \
 218                       diagnostic_pd, \
 219                       experimental, \
 220                       notproduct, \
 221                       manageable, \
 222                       product_rw, \
 223                       lp64_product, \
 224                       range, \
 225                       constraint, \
 226                       writeable) \
 227                                                                             \
 228   lp64_product(bool, UseCompressedOops, false,                              \
 229           "Use 32-bit object references in 64-bit VM. "                     \
 230           "lp64_product means flag is always constant in 32 bit VM")        \
 231                                                                             \
 232   lp64_product(bool, UseCompressedClassPointers, false,                     \
 233           "Use 32-bit class pointers in 64-bit VM. "                        \
 234           "lp64_product means flag is always constant in 32 bit VM")        \
 235                                                                             \
 236   notproduct(bool, CheckCompressedOops, true,                               \
 237           "Generate checks in encoding/decoding code in debug VM")          \
 238                                                                             \
 239   product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17),                        \
 240           "Heap allocation steps through preferred address regions to find" \
 241           " where it can allocate the heap. Number of steps to take per "   \
 242           "region.")                                                        \
 243           range(1, max_uintx)                                               \
 244                                                                             \
 245   lp64_product(intx, ObjectAlignmentInBytes, 8,                             \
 246           "Default object alignment in bytes, 8 is minimum")                \
 247           range(8, 256)                                                     \
 248           constraint(ObjectAlignmentInBytesConstraintFunc,AtParse)          \
 249                                                                             \
 250   product(bool, AssumeMP, true,                                             \
 251           "(Deprecated) Instruct the VM to assume multiple processors are available")\
 252                                                                             \
 253   /* UseMembar is theoretically a temp flag used for memory barrier      */ \
 254   /* removal testing.  It was supposed to be removed before FCS but has  */ \
 255   /* been re-added (see 6401008)                                         */ \
 256   product_pd(bool, UseMembar,                                               \
 257           "(Unstable) Issues membars on thread state transitions")          \
 258                                                                             \
 259   develop(bool, CleanChunkPoolAsync, true,                                  \
 260           "Clean the chunk pool asynchronously")                            \
 261                                                                             \
 262   product_pd(bool, ThreadLocalHandshakes,                                   \
 263           "Use thread-local polls instead of global poll for safepoints.")  \
 264           constraint(ThreadLocalHandshakesConstraintFunc,AfterErgo)         \
 265                                                                             \
 266   diagnostic(uint, HandshakeTimeout, 0,                                     \
 267           "If nonzero set a timeout in milliseconds for handshakes")        \
 268                                                                             \
 269   experimental(bool, AlwaysSafeConstructors, false,                         \
 270           "Force safe construction, as if all fields are final.")           \
 271                                                                             \
 272   diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug,                  \
 273           "Enable normal processing of flags relating to field diagnostics")\
 274                                                                             \
 275   experimental(bool, UnlockExperimentalVMOptions, false,                    \
 276           "Enable normal processing of flags relating to experimental "     \
 277           "features")                                                       \
 278                                                                             \
 279   product(bool, JavaMonitorsInStackTrace, true,                             \
 280           "Print information about Java monitor locks when the stacks are"  \
 281           "dumped")                                                         \
 282                                                                             \
 283   product_pd(bool, UseLargePages,                                           \
 284           "Use large page memory")                                          \
 285                                                                             \
 286   product_pd(bool, UseLargePagesIndividualAllocation,                       \
 287           "Allocate large pages individually for better affinity")          \
 288                                                                             \
 289   develop(bool, LargePagesIndividualAllocationInjectError, false,           \
 290           "Fail large pages individual allocation")                         \
 291                                                                             \
 292   product(bool, UseLargePagesInMetaspace, false,                            \
 293           "Use large page memory in metaspace. "                            \
 294           "Only used if UseLargePages is enabled.")                         \
 295                                                                             \
 296   product(bool, UseNUMA, false,                                             \
 297           "Use NUMA if available")                                          \
 298                                                                             \
 299   product(bool, UseNUMAInterleaving, false,                                 \
 300           "Interleave memory across NUMA nodes if available")               \
 301                                                                             \
 302   product(size_t, NUMAInterleaveGranularity, 2*M,                           \
 303           "Granularity to use for NUMA interleaving on Windows OS")         \
 304           range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \
 305                                                                             \
 306   product(bool, ForceNUMA, false,                                           \
 307           "Force NUMA optimizations on single-node/UMA systems")            \
 308                                                                             \
 309   product(uintx, NUMAChunkResizeWeight, 20,                                 \
 310           "Percentage (0-100) used to weight the current sample when "      \
 311           "computing exponentially decaying average for "                   \
 312           "AdaptiveNUMAChunkSizing")                                        \
 313           range(0, 100)                                                     \
 314                                                                             \
 315   product(size_t, NUMASpaceResizeRate, 1*G,                                 \
 316           "Do not reallocate more than this amount per collection")         \
 317           range(0, max_uintx)                                               \
 318                                                                             \
 319   product(bool, UseAdaptiveNUMAChunkSizing, true,                           \
 320           "Enable adaptive chunk sizing for NUMA")                          \
 321                                                                             \
 322   product(bool, NUMAStats, false,                                           \
 323           "Print NUMA stats in detailed heap information")                  \
 324                                                                             \
 325   product(uintx, NUMAPageScanRate, 256,                                     \
 326           "Maximum number of pages to include in the page scan procedure")  \
 327           range(0, max_uintx)                                               \
 328                                                                             \
 329   product_pd(bool, NeedsDeoptSuspend,                                       \
 330           "True for register window machines (sparc/ia64)")                 \
 331                                                                             \
 332   product(intx, UseSSE, 99,                                                 \
 333           "Highest supported SSE instructions set on x86/x64")              \
 334           range(0, 99)                                                      \
 335                                                                             \
 336   product(bool, UseAES, false,                                              \
 337           "Control whether AES instructions are used when available")       \
 338                                                                             \
 339   product(bool, UseFMA, false,                                              \
 340           "Control whether FMA instructions are used when available")       \
 341                                                                             \
 342   product(bool, UseSHA, false,                                              \
 343           "Control whether SHA instructions are used when available")       \
 344                                                                             \
 345   diagnostic(bool, UseGHASHIntrinsics, false,                               \
 346           "Use intrinsics for GHASH versions of crypto")                    \
 347                                                                             \
 348   product(bool, UseBASE64Intrinsics, false,                                 \
 349           "Use intrinsics for java.util.Base64")                            \
 350                                                                             \
 351   product(size_t, LargePageSizeInBytes, 0,                                  \
 352           "Large page size (0 to let VM choose the page size)")             \
 353           range(0, max_uintx)                                               \
 354                                                                             \
 355   product(size_t, LargePageHeapSizeThreshold, 128*M,                        \
 356           "Use large pages if maximum heap is at least this big")           \
 357           range(0, max_uintx)                                               \
 358                                                                             \
 359   product(bool, ForceTimeHighResolution, false,                             \
 360           "Using high time resolution (for Win32 only)")                    \
 361                                                                             \
 362   develop(bool, TracePcPatching, false,                                     \
 363           "Trace usage of frame::patch_pc")                                 \
 364                                                                             \
 365   develop(bool, TraceRelocator, false,                                      \
 366           "Trace the bytecode relocator")                                   \
 367                                                                             \
 368   develop(bool, TraceLongCompiles, false,                                   \
 369           "Print out every time compilation is longer than "                \
 370           "a given threshold")                                              \
 371                                                                             \
 372   diagnostic(bool, SafepointALot, false,                                    \
 373           "Generate a lot of safepoints. This works with "                  \
 374           "GuaranteedSafepointInterval")                                    \
 375                                                                             \
 376   product_pd(bool, BackgroundCompilation,                                   \
 377           "A thread requesting compilation is not blocked during "          \
 378           "compilation")                                                    \
 379                                                                             \
 380   product(bool, PrintVMQWaitTime, false,                                    \
 381           "Print out the waiting time in VM operation queue")               \
 382                                                                             \
 383   product(bool, MethodFlushing, true,                                       \
 384           "Reclamation of zombie and not-entrant methods")                  \
 385                                                                             \
 386   develop(bool, VerifyStack, false,                                         \
 387           "Verify stack of each thread when it is entering a runtime call") \
 388                                                                             \
 389   diagnostic(bool, ForceUnreachable, false,                                 \
 390           "Make all non code cache addresses to be unreachable by "         \
 391           "forcing use of 64bit literal fixups")                            \
 392                                                                             \
 393   notproduct(bool, StressDerivedPointers, false,                            \
 394           "Force scavenge when a derived pointer is detected on stack "     \
 395           "after rtm call")                                                 \
 396                                                                             \
 397   develop(bool, TraceDerivedPointers, false,                                \
 398           "Trace traversal of derived pointers on stack")                   \
 399                                                                             \
 400   notproduct(bool, TraceCodeBlobStacks, false,                              \
 401           "Trace stack-walk of codeblobs")                                  \
 402                                                                             \
 403   product(bool, PrintJNIResolving, false,                                   \
 404           "Used to implement -v:jni")                                       \
 405                                                                             \
 406   notproduct(bool, PrintRewrites, false,                                    \
 407           "Print methods that are being rewritten")                         \
 408                                                                             \
 409   product(bool, UseInlineCaches, true,                                      \
 410           "Use Inline Caches for virtual calls ")                           \
 411                                                                             \
 412   diagnostic(bool, InlineArrayCopy, true,                                   \
 413           "Inline arraycopy native that is known to be part of "            \
 414           "base library DLL")                                               \
 415                                                                             \
 416   diagnostic(bool, InlineObjectHash, true,                                  \
 417           "Inline Object::hashCode() native that is known to be part "      \
 418           "of base library DLL")                                            \
 419                                                                             \
 420   diagnostic(bool, InlineNatives, true,                                     \
 421           "Inline natives that are known to be part of base library DLL")   \
 422                                                                             \
 423   diagnostic(bool, InlineMathNatives, true,                                 \
 424           "Inline SinD, CosD, etc.")                                        \
 425                                                                             \
 426   diagnostic(bool, InlineClassNatives, true,                                \
 427           "Inline Class.isInstance, etc")                                   \
 428                                                                             \
 429   diagnostic(bool, InlineThreadNatives, true,                               \
 430           "Inline Thread.currentThread, etc")                               \
 431                                                                             \
 432   diagnostic(bool, InlineUnsafeOps, true,                                   \
 433           "Inline memory ops (native methods) from Unsafe")                 \
 434                                                                             \
 435   product(bool, CriticalJNINatives, true,                                   \
 436           "Check for critical JNI entry points")                            \
 437                                                                             \
 438   product(bool, UseLegacyJNINameEscaping, false,                            \
 439           "Use the original JNI name escaping scheme")                      \
 440                                                                             \
 441   notproduct(bool, StressCriticalJNINatives, false,                         \
 442           "Exercise register saving code in critical natives")              \
 443                                                                             \
 444   diagnostic(bool, UseAESIntrinsics, false,                                 \
 445           "Use intrinsics for AES versions of crypto")                      \
 446                                                                             \
 447   diagnostic(bool, UseAESCTRIntrinsics, false,                              \
 448           "Use intrinsics for the paralleled version of AES/CTR crypto")    \
 449                                                                             \
 450   diagnostic(bool, UseSHA1Intrinsics, false,                                \
 451           "Use intrinsics for SHA-1 crypto hash function. "                 \
 452           "Requires that UseSHA is enabled.")                               \
 453                                                                             \
 454   diagnostic(bool, UseSHA256Intrinsics, false,                              \
 455           "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. "  \
 456           "Requires that UseSHA is enabled.")                               \
 457                                                                             \
 458   diagnostic(bool, UseSHA512Intrinsics, false,                              \
 459           "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. "  \
 460           "Requires that UseSHA is enabled.")                               \
 461                                                                             \
 462   diagnostic(bool, UseCRC32Intrinsics, false,                               \
 463           "use intrinsics for java.util.zip.CRC32")                         \
 464                                                                             \
 465   diagnostic(bool, UseCRC32CIntrinsics, false,                              \
 466           "use intrinsics for java.util.zip.CRC32C")                        \
 467                                                                             \
 468   diagnostic(bool, UseAdler32Intrinsics, false,                             \
 469           "use intrinsics for java.util.zip.Adler32")                       \
 470                                                                             \
 471   diagnostic(bool, UseVectorizedMismatchIntrinsic, false,                   \
 472           "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \
 473                                                                             \
 474   diagnostic(ccstrlist, DisableIntrinsic, "",                               \
 475          "do not expand intrinsics whose (internal) names appear here")     \
 476                                                                             \
 477   develop(bool, TraceCallFixup, false,                                      \
 478           "Trace all call fixups")                                          \
 479                                                                             \
 480   develop(bool, DeoptimizeALot, false,                                      \
 481           "Deoptimize at every exit from the runtime system")               \
 482                                                                             \
 483   notproduct(ccstrlist, DeoptimizeOnlyAt, "",                               \
 484           "A comma separated list of bcis to deoptimize at")                \
 485                                                                             \
 486   product(bool, DeoptimizeRandom, false,                                    \
 487           "Deoptimize random frames on random exit from the runtime system")\
 488                                                                             \
 489   notproduct(bool, ZombieALot, false,                                       \
 490           "Create zombies (non-entrant) at exit from the runtime system")   \
 491                                                                             \
 492   product(bool, UnlinkSymbolsALot, false,                                   \
 493           "Unlink unreferenced symbols from the symbol table at safepoints")\
 494                                                                             \
 495   notproduct(bool, WalkStackALot, false,                                    \
 496           "Trace stack (no print) at every exit from the runtime system")   \
 497                                                                             \
 498   product(bool, Debugging, false,                                           \
 499           "Set when executing debug methods in debug.cpp "                  \
 500           "(to prevent triggering assertions)")                             \
 501                                                                             \
 502   notproduct(bool, StrictSafepointChecks, trueInDebug,                      \
 503           "Enable strict checks that safepoints cannot happen for threads " \
 504           "that use NoSafepointVerifier")                                   \
 505                                                                             \
 506   notproduct(bool, VerifyLastFrame, false,                                  \
 507           "Verify oops on last frame on entry to VM")                       \
 508                                                                             \
 509   product(bool, FailOverToOldVerifier, true,                                \
 510           "Fail over to old verifier when split verifier fails")            \
 511                                                                             \
 512   product(bool, SafepointTimeout, false,                                    \
 513           "Time out and warn or fail after SafepointTimeoutDelay "          \
 514           "milliseconds if failed to reach safepoint")                      \
 515                                                                             \
 516   diagnostic(bool, AbortVMOnSafepointTimeout, false,                        \
 517           "Abort upon failure to reach safepoint (see SafepointTimeout)")   \
 518                                                                             \
 519   diagnostic(bool, AbortVMOnVMOperationTimeout, false,                      \
 520           "Abort upon failure to complete VM operation promptly")           \
 521                                                                             \
 522   diagnostic(intx, AbortVMOnVMOperationTimeoutDelay, 1000,                  \
 523           "Delay in milliseconds for option AbortVMOnVMOperationTimeout")   \
 524           range(0, max_intx)                                                \
 525                                                                             \
 526   /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */      \
 527   /* typically, at most a few retries are needed                    */      \
 528   product(intx, SuspendRetryCount, 50,                                      \
 529           "Maximum retry count for an external suspend request")            \
 530           range(0, max_intx)                                                \
 531                                                                             \
 532   product(intx, SuspendRetryDelay, 5,                                       \
 533           "Milliseconds to delay per retry (* current_retry_count)")        \
 534           range(0, max_intx)                                                \
 535                                                                             \
 536   product(bool, AssertOnSuspendWaitFailure, false,                          \
 537           "Assert/Guarantee on external suspend wait failure")              \
 538                                                                             \
 539   product(bool, TraceSuspendWaitFailures, false,                            \
 540           "Trace external suspend wait failures")                           \
 541                                                                             \
 542   product(bool, MaxFDLimit, true,                                           \
 543           "Bump the number of file descriptors to maximum in Solaris")      \
 544                                                                             \
 545   diagnostic(bool, LogEvents, true,                                         \
 546           "Enable the various ring buffer event logs")                      \
 547                                                                             \
 548   diagnostic(uintx, LogEventsBufferEntries, 20,                             \
 549           "Number of ring buffer event logs")                               \
 550           range(1, NOT_LP64(1*K) LP64_ONLY(1*M))                            \
 551                                                                             \
 552   product(bool, BytecodeVerificationRemote, true,                           \
 553           "Enable the Java bytecode verifier for remote classes")           \
 554                                                                             \
 555   product(bool, BytecodeVerificationLocal, false,                           \
 556           "Enable the Java bytecode verifier for local classes")            \
 557                                                                             \
 558   develop(bool, ForceFloatExceptions, trueInDebug,                          \
 559           "Force exceptions on FP stack under/overflow")                    \
 560                                                                             \
 561   develop(bool, VerifyStackAtCalls, false,                                  \
 562           "Verify that the stack pointer is unchanged after calls")         \
 563                                                                             \
 564   develop(bool, TraceJavaAssertions, false,                                 \
 565           "Trace java language assertions")                                 \
 566                                                                             \
 567   notproduct(bool, VerifyCodeCache, false,                                  \
 568           "Verify code cache on memory allocation/deallocation")            \
 569                                                                             \
 570   develop(bool, UseMallocOnly, false,                                       \
 571           "Use only malloc/free for allocation (no resource area/arena)")   \
 572                                                                             \
 573   develop(bool, PrintMallocStatistics, false,                               \
 574           "Print malloc/free statistics")                                   \
 575                                                                             \
 576   develop(bool, ZapResourceArea, trueInDebug,                               \
 577           "Zap freed resource/arena space with 0xABABABAB")                 \
 578                                                                             \
 579   notproduct(bool, ZapVMHandleArea, trueInDebug,                            \
 580           "Zap freed VM handle space with 0xBCBCBCBC")                      \
 581                                                                             \
 582   notproduct(bool, ZapStackSegments, trueInDebug,                           \
 583           "Zap allocated/freed stack segments with 0xFADFADED")             \
 584                                                                             \
 585   develop(bool, ZapUnusedHeapArea, trueInDebug,                             \
 586           "Zap unused heap space with 0xBAADBABE")                          \
 587                                                                             \
 588   develop(bool, CheckZapUnusedHeapArea, false,                              \
 589           "Check zapping of unused heap space")                             \
 590                                                                             \
 591   develop(bool, ZapFillerObjects, trueInDebug,                              \
 592           "Zap filler objects with 0xDEAFBABE")                             \
 593                                                                             \
 594   develop(bool, PrintVMMessages, true,                                      \
 595           "Print VM messages on console")                                   \
 596                                                                             \
 597   notproduct(uintx, ErrorHandlerTest, 0,                                    \
 598           "If > 0, provokes an error after VM initialization; the value "   \
 599           "determines which error to provoke. See test_error_handler() "    \
 600           "in vmError.cpp.")                                                \
 601                                                                             \
 602   notproduct(uintx, TestCrashInErrorHandler, 0,                             \
 603           "If > 0, provokes an error inside VM error handler (a secondary " \
 604           "crash). see test_error_handler() in vmError.cpp")                \
 605                                                                             \
 606   notproduct(bool, TestSafeFetchInErrorHandler, false,                      \
 607           "If true, tests SafeFetch inside error handler.")                 \
 608                                                                             \
 609   notproduct(bool, TestUnresponsiveErrorHandler, false,                     \
 610           "If true, simulates an unresponsive error handler.")              \
 611                                                                             \
 612   develop(bool, Verbose, false,                                             \
 613           "Print additional debugging information from other modes")        \
 614                                                                             \
 615   develop(bool, PrintMiscellaneous, false,                                  \
 616           "Print uncategorized debugging information (requires +Verbose)")  \
 617                                                                             \
 618   develop(bool, WizardMode, false,                                          \
 619           "Print much more debugging information")                          \
 620                                                                             \
 621   product(bool, ShowMessageBoxOnError, false,                               \
 622           "Keep process alive on VM fatal error")                           \
 623                                                                             \
 624   product(bool, CreateCoredumpOnCrash, true,                                \
 625           "Create core/mini dump on VM fatal error")                        \
 626                                                                             \
 627   product(uint64_t, ErrorLogTimeout, 2 * 60,                                \
 628           "Timeout, in seconds, to limit the time spent on writing an "     \
 629           "error log in case of a crash.")                                  \
 630           range(0, (uint64_t)max_jlong/1000)                                \
 631                                                                             \
 632   product_pd(bool, UseOSErrorReporting,                                     \
 633           "Let VM fatal error propagate to the OS (ie. WER on Windows)")    \
 634                                                                             \
 635   product(bool, SuppressFatalErrorMessage, false,                           \
 636           "Report NO fatal error message (avoid deadlock)")                 \
 637                                                                             \
 638   product(ccstrlist, OnError, "",                                           \
 639           "Run user-defined commands on fatal error; see VMError.cpp "      \
 640           "for examples")                                                   \
 641                                                                             \
 642   product(ccstrlist, OnOutOfMemoryError, "",                                \
 643           "Run user-defined commands on first java.lang.OutOfMemoryError")  \
 644                                                                             \
 645   manageable(bool, HeapDumpBeforeFullGC, false,                             \
 646           "Dump heap to file before any major stop-the-world GC")           \
 647                                                                             \
 648   manageable(bool, HeapDumpAfterFullGC, false,                              \
 649           "Dump heap to file after any major stop-the-world GC")            \
 650                                                                             \
 651   manageable(bool, HeapDumpOnOutOfMemoryError, false,                       \
 652           "Dump heap to file when java.lang.OutOfMemoryError is thrown")    \
 653                                                                             \
 654   manageable(ccstr, HeapDumpPath, NULL,                                     \
 655           "When HeapDumpOnOutOfMemoryError is on, the path (filename or "   \
 656           "directory) of the dump file (defaults to java_pid<pid>.hprof "   \
 657           "in the working directory)")                                      \
 658                                                                             \
 659   develop(bool, BreakAtWarning, false,                                      \
 660           "Execute breakpoint upon encountering VM warning")                \
 661                                                                             \
 662   develop(bool, UseFakeTimers, false,                                       \
 663           "Tell whether the VM should use system time or a fake timer")     \
 664                                                                             \
 665   product(ccstr, NativeMemoryTracking, "off",                               \
 666           "Native memory tracking options")                                 \
 667                                                                             \
 668   diagnostic(bool, PrintNMTStatistics, false,                               \
 669           "Print native memory tracking summary data if it is on")          \
 670                                                                             \
 671   diagnostic(bool, LogCompilation, false,                                   \
 672           "Log compilation activity in detail to LogFile")                  \
 673                                                                             \
 674   product(bool, PrintCompilation, false,                                    \
 675           "Print compilations")                                             \
 676                                                                             \
 677   product(bool, PrintExtendedThreadInfo, false,                             \
 678           "Print more information in thread dump")                          \
 679                                                                             \
 680   diagnostic(bool, TraceNMethodInstalls, false,                             \
 681           "Trace nmethod installation")                                     \
 682                                                                             \
 683   diagnostic(intx, ScavengeRootsInCode, 2,                                  \
 684           "0: do not allow scavengable oops in the code cache; "            \
 685           "1: allow scavenging from the code cache; "                       \
 686           "2: emit as many constants as the compiler can see")              \
 687           range(0, 2)                                                       \
 688                                                                             \
 689   product(bool, AlwaysRestoreFPU, false,                                    \
 690           "Restore the FPU control word after every JNI call (expensive)")  \
 691                                                                             \
 692   diagnostic(bool, PrintCompilation2, false,                                \
 693           "Print additional statistics per compilation")                    \
 694                                                                             \
 695   diagnostic(bool, PrintAdapterHandlers, false,                             \
 696           "Print code generated for i2c/c2i adapters")                      \
 697                                                                             \
 698   diagnostic(bool, VerifyAdapterCalls, trueInDebug,                         \
 699           "Verify that i2c/c2i adapters are called properly")               \
 700                                                                             \
 701   develop(bool, VerifyAdapterSharing, false,                                \
 702           "Verify that the code for shared adapters is the equivalent")     \
 703                                                                             \
 704   diagnostic(bool, PrintAssembly, false,                                    \
 705           "Print assembly code (using external disassembler.so)")           \
 706                                                                             \
 707   diagnostic(ccstr, PrintAssemblyOptions, NULL,                             \
 708           "Print options string passed to disassembler.so")                 \
 709                                                                             \
 710   notproduct(bool, PrintNMethodStatistics, false,                           \
 711           "Print a summary statistic for the generated nmethods")           \
 712                                                                             \
 713   diagnostic(bool, PrintNMethods, false,                                    \
 714           "Print assembly code for nmethods when generated")                \
 715                                                                             \
 716   diagnostic(bool, PrintNativeNMethods, false,                              \
 717           "Print assembly code for native nmethods when generated")         \
 718                                                                             \
 719   develop(bool, PrintDebugInfo, false,                                      \
 720           "Print debug information for all nmethods when generated")        \
 721                                                                             \
 722   develop(bool, PrintRelocations, false,                                    \
 723           "Print relocation information for all nmethods when generated")   \
 724                                                                             \
 725   develop(bool, PrintDependencies, false,                                   \
 726           "Print dependency information for all nmethods when generated")   \
 727                                                                             \
 728   develop(bool, PrintExceptionHandlers, false,                              \
 729           "Print exception handler tables for all nmethods when generated") \
 730                                                                             \
 731   develop(bool, StressCompiledExceptionHandlers, false,                     \
 732           "Exercise compiled exception handlers")                           \
 733                                                                             \
 734   develop(bool, InterceptOSException, false,                                \
 735           "Start debugger when an implicit OS (e.g. NULL) "                 \
 736           "exception happens")                                              \
 737                                                                             \
 738   product(bool, PrintCodeCache, false,                                      \
 739           "Print the code cache memory usage when exiting")                 \
 740                                                                             \
 741   develop(bool, PrintCodeCache2, false,                                     \
 742           "Print detailed usage information on the code cache when exiting")\
 743                                                                             \
 744   product(bool, PrintCodeCacheOnCompilation, false,                         \
 745           "Print the code cache memory usage each time a method is "        \
 746           "compiled")                                                       \
 747                                                                             \
 748   diagnostic(bool, PrintCodeHeapAnalytics, false,                           \
 749           "Print code heap usage statistics on exit and on full condition") \
 750                                                                             \
 751   diagnostic(bool, PrintStubCode, false,                                    \
 752           "Print generated stub code")                                      \
 753                                                                             \
 754   product(bool, StackTraceInThrowable, true,                                \
 755           "Collect backtrace in throwable when exception happens")          \
 756                                                                             \
 757   product(bool, OmitStackTraceInFastThrow, true,                            \
 758           "Omit backtraces for some 'hot' exceptions in optimized code")    \
 759                                                                             \
 760   product(bool, ProfilerPrintByteCodeStatistics, false,                     \
 761           "Print bytecode statistics when dumping profiler output")         \
 762                                                                             \
 763   product(bool, ProfilerRecordPC, false,                                    \
 764           "Collect ticks for each 16 byte interval of compiled code")       \
 765                                                                             \
 766   product(bool, ProfileVM, false,                                           \
 767           "Profile ticks that fall within VM (either in the VM Thread "     \
 768           "or VM code called through stubs)")                               \
 769                                                                             \
 770   product(bool, ProfileIntervals, false,                                    \
 771           "Print profiles for each interval (see ProfileIntervalsTicks)")   \
 772                                                                             \
 773   notproduct(bool, ProfilerCheckIntervals, false,                           \
 774           "Collect and print information on spacing of profiler ticks")     \
 775                                                                             \
 776   product(bool, PrintWarnings, true,                                        \
 777           "Print JVM warnings to output stream")                            \
 778                                                                             \
 779   notproduct(uintx, WarnOnStalledSpinLock, 0,                               \
 780           "Print warnings for stalled SpinLocks")                           \
 781                                                                             \
 782   product(bool, RegisterFinalizersAtInit, true,                             \
 783           "Register finalizable objects at end of Object.<init> or "        \
 784           "after allocation")                                               \
 785                                                                             \
 786   develop(bool, RegisterReferences, true,                                   \
 787           "Tell whether the VM should register soft/weak/final/phantom "    \
 788           "references")                                                     \
 789                                                                             \
 790   develop(bool, IgnoreRewrites, false,                                      \
 791           "Suppress rewrites of bytecodes in the oopmap generator. "        \
 792           "This is unsafe!")                                                \
 793                                                                             \
 794   develop(bool, PrintCodeCacheExtension, false,                             \
 795           "Print extension of code cache")                                  \
 796                                                                             \
 797   develop(bool, UsePrivilegedStack, true,                                   \
 798           "Enable the security JVM functions")                              \
 799                                                                             \
 800   develop(bool, ProtectionDomainVerification, true,                         \
 801           "Verify protection domain before resolution in system dictionary")\
 802                                                                             \
 803   product(bool, ClassUnloading, true,                                       \
 804           "Do unloading of classes")                                        \
 805                                                                             \
 806   product(bool, ClassUnloadingWithConcurrentMark, true,                     \
 807           "Do unloading of classes with a concurrent marking cycle")        \
 808                                                                             \
 809   develop(bool, DisableStartThread, false,                                  \
 810           "Disable starting of additional Java threads "                    \
 811           "(for debugging only)")                                           \
 812                                                                             \
 813   develop(bool, MemProfiling, false,                                        \
 814           "Write memory usage profiling to log file")                       \
 815                                                                             \
 816   notproduct(bool, PrintSystemDictionaryAtExit, false,                      \
 817           "Print the system dictionary at exit")                            \
 818                                                                             \
 819   diagnostic(bool, DynamicallyResizeSystemDictionaries, true,               \
 820           "Dynamically resize system dictionaries as needed")               \
 821                                                                             \
 822   product(bool, AlwaysLockClassLoader, false,                               \
 823           "Require the VM to acquire the class loader lock before calling " \
 824           "loadClass() even for class loaders registering "                 \
 825           "as parallel capable")                                            \
 826                                                                             \
 827   product(bool, AllowParallelDefineClass, false,                            \
 828           "Allow parallel defineClass requests for class loaders "          \
 829           "registering as parallel capable")                                \
 830                                                                             \
 831   product_pd(bool, DontYieldALot,                                           \
 832           "Throw away obvious excess yield calls")                          \
 833                                                                             \
 834   develop(bool, UseDetachedThreads, true,                                   \
 835           "Use detached threads that are recycled upon termination "        \
 836           "(for Solaris only)")                                             \
 837                                                                             \
 838   experimental(bool, DisablePrimordialThreadGuardPages, false,              \
 839                "Disable the use of stack guard pages if the JVM is loaded " \
 840                "on the primordial process thread")                          \
 841                                                                             \
 842   product(bool, UseLWPSynchronization, true,                                \
 843           "Use LWP-based instead of libthread-based synchronization "       \
 844           "(SPARC only)")                                                   \
 845                                                                             \
 846   experimental(ccstr, SyncKnobs, NULL,                                      \
 847                "(Unstable) Various monitor synchronization tunables")       \
 848                                                                             \
 849   experimental(intx, EmitSync, 0,                                           \
 850                "(Unsafe, Unstable) "                                        \
 851                "Control emission of inline sync fast-path code")            \
 852                                                                             \
 853   product(intx, MonitorBound, 0, "Bound Monitor population")                \
 854           range(0, max_jint)                                                \
 855                                                                             \
 856   product(bool, MonitorInUseLists, true, "Track Monitors for Deflation")    \
 857                                                                             \
 858   experimental(intx, MonitorUsedDeflationThreshold, 90,                     \
 859                 "Percentage of used monitors before triggering cleanup "    \
 860                 "safepoint which deflates monitors (0 is off). "            \
 861                 "The check is performed on GuaranteedSafepointInterval.")   \
 862                 range(0, 100)                                               \
 863                                                                             \
 864   experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) "                    \
 865                "Experimental Sync flags")                                   \
 866                                                                             \
 867   experimental(intx, SyncVerbose, 0, "(Unstable)")                          \
 868                                                                             \
 869   experimental(intx, hashCode, 5,                                           \
 870                "(Unstable) select hashCode generation algorithm")           \
 871                                                                             \
 872   product(bool, FilterSpuriousWakeups, true,                                \
 873           "When true prevents OS-level spurious, or premature, wakeups "    \
 874           "from Object.wait (Ignored for Windows)")                         \
 875                                                                             \
 876   develop(bool, UsePthreads, false,                                         \
 877           "Use pthread-based instead of libthread-based synchronization "   \
 878           "(SPARC only)")                                                   \
 879                                                                             \
 880   product(bool, ReduceSignalUsage, false,                                   \
 881           "Reduce the use of OS signals in Java and/or the VM")             \
 882                                                                             \
 883   develop(bool, LoadLineNumberTables, true,                                 \
 884           "Tell whether the class file parser loads line number tables")    \
 885                                                                             \
 886   develop(bool, LoadLocalVariableTables, true,                              \
 887           "Tell whether the class file parser loads local variable tables") \
 888                                                                             \
 889   develop(bool, LoadLocalVariableTypeTables, true,                          \
 890           "Tell whether the class file parser loads local variable type"    \
 891           "tables")                                                         \
 892                                                                             \
 893   product(bool, AllowUserSignalHandlers, false,                             \
 894           "Do not complain if the application installs signal handlers "    \
 895           "(Solaris & Linux only)")                                         \
 896                                                                             \
 897   product(bool, UseSignalChaining, true,                                    \
 898           "Use signal-chaining to invoke signal handlers installed "        \
 899           "by the application (Solaris & Linux only)")                      \
 900                                                                             \
 901   product(bool, AllowJNIEnvProxy, false,                                    \
 902           "Allow JNIEnv proxies for jdbx")                                  \
 903                                                                             \
 904   product(bool, RestoreMXCSROnJNICalls, false,                              \
 905           "Restore MXCSR when returning from JNI calls")                    \
 906                                                                             \
 907   product(bool, CheckJNICalls, false,                                       \
 908           "Verify all arguments to JNI calls")                              \
 909                                                                             \
 910   product(bool, UseFastJNIAccessors, true,                                  \
 911           "Use optimized versions of Get<Primitive>Field")                  \
 912                                                                             \
 913   product(intx, MaxJNILocalCapacity, 65536,                                 \
 914           "Maximum allowable local JNI handle capacity to "                 \
 915           "EnsureLocalCapacity() and PushLocalFrame(), "                    \
 916           "where <= 0 is unlimited, default: 65536")                        \
 917           range(min_intx, max_intx)                                         \
 918                                                                             \
 919   product(bool, EagerXrunInit, false,                                       \
 920           "Eagerly initialize -Xrun libraries; allows startup profiling, "  \
 921           "but not all -Xrun libraries may support the state of the VM "    \
 922           "at this time")                                                   \
 923                                                                             \
 924   product(bool, PreserveAllAnnotations, false,                              \
 925           "Preserve RuntimeInvisibleAnnotations as well "                   \
 926           "as RuntimeVisibleAnnotations")                                   \
 927                                                                             \
 928   develop(uintx, PreallocatedOutOfMemoryErrorCount, 4,                      \
 929           "Number of OutOfMemoryErrors preallocated with backtrace")        \
 930                                                                             \
 931   product(bool, UseXMMForArrayCopy, false,                                  \
 932           "Use SSE2 MOVQ instruction for Arraycopy")                        \
 933                                                                             \
 934   product(intx, FieldsAllocationStyle, 1,                                   \
 935           "0 - type based with oops first, "                                \
 936           "1 - with oops last, "                                            \
 937           "2 - oops in super and sub classes are together")                 \
 938           range(0, 2)                                                       \
 939                                                                             \
 940   product(bool, CompactFields, true,                                        \
 941           "Allocate nonstatic fields in gaps between previous fields")      \
 942                                                                             \
 943   notproduct(bool, PrintFieldLayout, false,                                 \
 944           "Print field layout for each class")                              \
 945                                                                             \
 946   /* Need to limit the extent of the padding to reasonable size.          */\
 947   /* 8K is well beyond the reasonable HW cache line size, even with       */\
 948   /* aggressive prefetching, while still leaving the room for segregating */\
 949   /* among the distinct pages.                                            */\
 950   product(intx, ContendedPaddingWidth, 128,                                 \
 951           "How many bytes to pad the fields/classes marked @Contended with")\
 952           range(0, 8192)                                                    \
 953           constraint(ContendedPaddingWidthConstraintFunc,AfterErgo)         \
 954                                                                             \
 955   product(bool, EnableContended, true,                                      \
 956           "Enable @Contended annotation support")                           \
 957                                                                             \
 958   product(bool, RestrictContended, true,                                    \
 959           "Restrict @Contended to trusted classes")                         \
 960                                                                             \
 961   product(bool, UseBiasedLocking, true,                                     \
 962           "Enable biased locking in JVM")                                   \
 963                                                                             \
 964   product(intx, BiasedLockingStartupDelay, 0,                               \
 965           "Number of milliseconds to wait before enabling biased locking")  \
 966           range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \
 967           constraint(BiasedLockingStartupDelayFunc,AfterErgo)               \
 968                                                                             \
 969   diagnostic(bool, PrintBiasedLockingStatistics, false,                     \
 970           "Print statistics of biased locking in JVM")                      \
 971                                                                             \
 972   product(intx, BiasedLockingBulkRebiasThreshold, 20,                       \
 973           "Threshold of number of revocations per type to try to "          \
 974           "rebias all objects in the heap of that type")                    \
 975           range(0, max_intx)                                                \
 976           constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo)        \
 977                                                                             \
 978   product(intx, BiasedLockingBulkRevokeThreshold, 40,                       \
 979           "Threshold of number of revocations per type to permanently "     \
 980           "revoke biases of all objects in the heap of that type")          \
 981           range(0, max_intx)                                                \
 982           constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo)        \
 983                                                                             \
 984   product(intx, BiasedLockingDecayTime, 25000,                              \
 985           "Decay time (in milliseconds) to re-enable bulk rebiasing of a "  \
 986           "type after previous bulk rebias")                                \
 987           range(500, max_intx)                                              \
 988           constraint(BiasedLockingDecayTimeFunc,AfterErgo)                  \
 989                                                                             \
 990   product(bool, ExitOnOutOfMemoryError, false,                              \
 991           "JVM exits on the first occurrence of an out-of-memory error")    \
 992                                                                             \
 993   product(bool, CrashOnOutOfMemoryError, false,                             \
 994           "JVM aborts, producing an error log and core/mini dump, on the "  \
 995           "first occurrence of an out-of-memory error")                     \
 996                                                                             \
 997   /* tracing */                                                             \
 998                                                                             \
 999   develop(bool, StressRewriter, false,                                      \
1000           "Stress linktime bytecode rewriting")                             \
1001                                                                             \
1002   product(ccstr, TraceJVMTI, NULL,                                          \
1003           "Trace flags for JVMTI functions and events")                     \
1004                                                                             \
1005   /* This option can change an EMCP method into an obsolete method. */      \
1006   /* This can affect tests that except specific methods to be EMCP. */      \
1007   /* This option should be used with caution.                       */      \
1008   product(bool, StressLdcRewrite, false,                                    \
1009           "Force ldc -> ldc_w rewrite during RedefineClasses")              \
1010                                                                             \
1011   /* change to false by default sometime after Mustang */                   \
1012   product(bool, VerifyMergedCPBytecodes, true,                              \
1013           "Verify bytecodes after RedefineClasses constant pool merging")   \
1014                                                                             \
1015   develop(bool, TraceBytecodes, false,                                      \
1016           "Trace bytecode execution")                                       \
1017                                                                             \
1018   develop(bool, TraceICs, false,                                            \
1019           "Trace inline cache changes")                                     \
1020                                                                             \
1021   notproduct(bool, TraceInvocationCounterOverflow, false,                   \
1022           "Trace method invocation counter overflow")                       \
1023                                                                             \
1024   develop(bool, TraceInlineCacheClearing, false,                            \
1025           "Trace clearing of inline caches in nmethods")                    \
1026                                                                             \
1027   develop(bool, TraceDependencies, false,                                   \
1028           "Trace dependencies")                                             \
1029                                                                             \
1030   develop(bool, VerifyDependencies, trueInDebug,                            \
1031           "Exercise and verify the compilation dependency mechanism")       \
1032                                                                             \
1033   develop(bool, TraceNewOopMapGeneration, false,                            \
1034           "Trace OopMapGeneration")                                         \
1035                                                                             \
1036   develop(bool, TraceNewOopMapGenerationDetailed, false,                    \
1037           "Trace OopMapGeneration: print detailed cell states")             \
1038                                                                             \
1039   develop(bool, TimeOopMap, false,                                          \
1040           "Time calls to GenerateOopMap::compute_map() in sum")             \
1041                                                                             \
1042   develop(bool, TimeOopMap2, false,                                         \
1043           "Time calls to GenerateOopMap::compute_map() individually")       \
1044                                                                             \
1045   develop(bool, TraceOopMapRewrites, false,                                 \
1046           "Trace rewriting of method oops during oop map generation")       \
1047                                                                             \
1048   develop(bool, TraceICBuffer, false,                                       \
1049           "Trace usage of IC buffer")                                       \
1050                                                                             \
1051   develop(bool, TraceCompiledIC, false,                                     \
1052           "Trace changes of compiled IC")                                   \
1053                                                                             \
1054   develop(bool, FLSVerifyDictionary, false,                                 \
1055           "Do lots of (expensive) FLS dictionary verification")             \
1056                                                                             \
1057                                                                             \
1058   notproduct(bool, CheckMemoryInitialization, false,                        \
1059           "Check memory initialization")                                    \
1060                                                                             \
1061   product(uintx, ProcessDistributionStride, 4,                              \
1062           "Stride through processors when distributing processes")          \
1063           range(0, max_juint)                                               \
1064                                                                             \
1065   develop(bool, TraceFinalizerRegistration, false,                          \
1066           "Trace registration of final references")                         \
1067                                                                             \
1068   product(bool, IgnoreEmptyClassPaths, false,                               \
1069           "Ignore empty path elements in -classpath")                       \
1070                                                                             \
1071   product(size_t, InitialBootClassLoaderMetaspaceSize,                      \
1072           NOT_LP64(2200*K) LP64_ONLY(4*M),                                  \
1073           "Initial size of the boot class loader data metaspace")           \
1074           range(30*K, max_uintx/BytesPerWord)                               \
1075           constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\
1076                                                                             \
1077   product(bool, PrintHeapAtSIGBREAK, true,                                  \
1078           "Print heap layout in response to SIGBREAK")                      \
1079                                                                             \
1080   manageable(bool, PrintClassHistogram, false,                              \
1081           "Print a histogram of class instances")                           \
1082                                                                             \
1083   develop(bool, IgnoreLibthreadGPFault, false,                              \
1084           "Suppress workaround for libthread GP fault")                     \
1085                                                                             \
1086   experimental(double, ObjectCountCutOffPercent, 0.5,                       \
1087           "The percentage of the used heap that the instances of a class "  \
1088           "must occupy for the class to generate a trace event")            \
1089           range(0.0, 100.0)                                                 \
1090                                                                             \
1091   /* JVMTI heap profiling */                                                \
1092                                                                             \
1093   diagnostic(bool, TraceJVMTIObjectTagging, false,                          \
1094           "Trace JVMTI object tagging calls")                               \
1095                                                                             \
1096   diagnostic(bool, VerifyBeforeIteration, false,                            \
1097           "Verify memory system before JVMTI iteration")                    \
1098                                                                             \
1099   /* compiler interface */                                                  \
1100                                                                             \
1101   develop(bool, CIPrintCompilerName, false,                                 \
1102           "when CIPrint is active, print the name of the active compiler")  \
1103                                                                             \
1104   diagnostic(bool, CIPrintCompileQueue, false,                              \
1105           "display the contents of the compile queue whenever a "           \
1106           "compilation is enqueued")                                        \
1107                                                                             \
1108   develop(bool, CIPrintRequests, false,                                     \
1109           "display every request for compilation")                          \
1110                                                                             \
1111   product(bool, CITime, false,                                              \
1112           "collect timing information for compilation")                     \
1113                                                                             \
1114   develop(bool, CITimeVerbose, false,                                       \
1115           "be more verbose in compilation timings")                         \
1116                                                                             \
1117   develop(bool, CITimeEach, false,                                          \
1118           "display timing information after each successful compilation")   \
1119                                                                             \
1120   develop(bool, CICountOSR, false,                                          \
1121           "use a separate counter when assigning ids to osr compilations")  \
1122                                                                             \
1123   develop(bool, CICompileNatives, true,                                     \
1124           "compile native methods if supported by the compiler")            \
1125                                                                             \
1126   develop_pd(bool, CICompileOSR,                                            \
1127           "compile on stack replacement methods if supported by the "       \
1128           "compiler")                                                       \
1129                                                                             \
1130   develop(bool, CIPrintMethodCodes, false,                                  \
1131           "print method bytecodes of the compiled code")                    \
1132                                                                             \
1133   develop(bool, CIPrintTypeFlow, false,                                     \
1134           "print the results of ciTypeFlow analysis")                       \
1135                                                                             \
1136   develop(bool, CITraceTypeFlow, false,                                     \
1137           "detailed per-bytecode tracing of ciTypeFlow analysis")           \
1138                                                                             \
1139   develop(intx, OSROnlyBCI, -1,                                             \
1140           "OSR only at this bci.  Negative values mean exclude that bci")   \
1141                                                                             \
1142   /* compiler */                                                            \
1143                                                                             \
1144   /* notice: the max range value here is max_jint, not max_intx  */         \
1145   /* because of overflow issue                                   */         \
1146   product(intx, CICompilerCount, CI_COMPILER_COUNT,                         \
1147           "Number of compiler threads to run")                              \
1148           range(0, max_jint)                                                \
1149           constraint(CICompilerCountConstraintFunc, AfterErgo)              \
1150                                                                             \
1151   product(bool, UseDynamicNumberOfCompilerThreads, true,                    \
1152           "Dynamically choose the number of parallel compiler threads")     \
1153                                                                             \
1154   diagnostic(bool, ReduceNumberOfCompilerThreads, true,                     \
1155              "Reduce the number of parallel compiler threads when they "    \
1156              "are not used")                                                \
1157                                                                             \
1158   diagnostic(bool, TraceCompilerThreads, false,                             \
1159              "Trace creation and removal of compiler threads")              \
1160                                                                             \
1161   develop(bool, InjectCompilerCreationFailure, false,                       \
1162           "Inject thread creation failures for "                            \
1163           "UseDynamicNumberOfCompilerThreads")                              \
1164                                                                             \
1165   product(intx, CompilationPolicyChoice, 0,                                 \
1166           "which compilation policy (0-2)")                                 \
1167           range(0, 2)                                                       \
1168                                                                             \
1169   develop(bool, UseStackBanging, true,                                      \
1170           "use stack banging for stack overflow checks (required for "      \
1171           "proper StackOverflow handling; disable only to measure cost "    \
1172           "of stackbanging)")                                               \
1173                                                                             \
1174   develop(bool, UseStrictFP, true,                                          \
1175           "use strict fp if modifier strictfp is set")                      \
1176                                                                             \
1177   develop(bool, GenerateSynchronizationCode, true,                          \
1178           "generate locking/unlocking code for synchronized methods and "   \
1179           "monitors")                                                       \
1180                                                                             \
1181   develop(bool, GenerateRangeChecks, true,                                  \
1182           "Generate range checks for array accesses")                       \
1183                                                                             \
1184   diagnostic_pd(bool, ImplicitNullChecks,                                   \
1185           "Generate code for implicit null checks")                         \
1186                                                                             \
1187   product_pd(bool, TrapBasedNullChecks,                                     \
1188           "Generate code for null checks that uses a cmp and trap "         \
1189           "instruction raising SIGTRAP.  This is only used if an access to" \
1190           "null (+offset) will not raise a SIGSEGV, i.e.,"                  \
1191           "ImplicitNullChecks don't work (PPC64).")                         \
1192                                                                             \
1193   product(bool, PrintSafepointStatistics, false,                            \
1194           "(Deprecated) Print statistics about safepoint synchronization")  \
1195                                                                             \
1196   product(intx, PrintSafepointStatisticsCount, 300,                         \
1197           "(Deprecated) Total number of safepoint statistics collected "    \
1198           "before printing them out")                                       \
1199           range(1, max_intx)                                                \
1200                                                                             \
1201   product(intx, PrintSafepointStatisticsTimeout,  -1,                       \
1202           "(Deprecated) Print safepoint statistics only when safepoint takes "  \
1203           "more than PrintSafepointSatisticsTimeout in millis")             \
1204   LP64_ONLY(range(-1, max_intx/MICROUNITS))                                 \
1205   NOT_LP64(range(-1, max_intx))                                             \
1206                                                                             \
1207   diagnostic(bool, EnableThreadSMRExtraValidityChecks, true,                \
1208              "Enable Thread SMR extra validity checks")                     \
1209                                                                             \
1210   diagnostic(bool, EnableThreadSMRStatistics, trueInDebug,                  \
1211              "Enable Thread SMR Statistics")                                \
1212                                                                             \
1213   product(bool, Inline, true,                                               \
1214           "Enable inlining")                                                \
1215                                                                             \
1216   product(bool, ClipInlining, true,                                         \
1217           "Clip inlining if aggregate method exceeds DesiredMethodLimit")   \
1218                                                                             \
1219   develop(bool, UseCHA, true,                                               \
1220           "Enable CHA")                                                     \
1221                                                                             \
1222   product(bool, UseTypeProfile, true,                                       \
1223           "Check interpreter profile for historically monomorphic calls")   \
1224                                                                             \
1225   diagnostic(bool, PrintInlining, false,                                    \
1226           "Print inlining optimizations")                                   \
1227                                                                             \
1228   product(bool, UsePopCountInstruction, false,                              \
1229           "Use population count instruction")                               \
1230                                                                             \
1231   develop(bool, EagerInitialization, false,                                 \
1232           "Eagerly initialize classes if possible")                         \
1233                                                                             \
1234   diagnostic(bool, LogTouchedMethods, false,                                \
1235           "Log methods which have been ever touched in runtime")            \
1236                                                                             \
1237   diagnostic(bool, PrintTouchedMethodsAtExit, false,                        \
1238           "Print all methods that have been ever touched in runtime")       \
1239                                                                             \
1240   develop(bool, TraceMethodReplacement, false,                              \
1241           "Print when methods are replaced do to recompilation")            \
1242                                                                             \
1243   develop(bool, PrintMethodFlushing, false,                                 \
1244           "Print the nmethods being flushed")                               \
1245                                                                             \
1246   diagnostic(bool, PrintMethodFlushingStatistics, false,                    \
1247           "print statistics about method flushing")                         \
1248                                                                             \
1249   diagnostic(intx, HotMethodDetectionLimit, 100000,                         \
1250           "Number of compiled code invocations after which "                \
1251           "the method is considered as hot by the flusher")                 \
1252           range(1, max_jint)                                                \
1253                                                                             \
1254   diagnostic(intx, MinPassesBeforeFlush, 10,                                \
1255           "Minimum number of sweeper passes before an nmethod "             \
1256           "can be flushed")                                                 \
1257           range(0, max_intx)                                                \
1258                                                                             \
1259   product(bool, UseCodeAging, true,                                         \
1260           "Insert counter to detect warm methods")                          \
1261                                                                             \
1262   diagnostic(bool, StressCodeAging, false,                                  \
1263           "Start with counters compiled in")                                \
1264                                                                             \
1265   develop(bool, StressCodeBuffers, false,                                   \
1266           "Exercise code buffer expansion and other rare state changes")    \
1267                                                                             \
1268   diagnostic(bool, DebugNonSafepoints, trueInDebug,                         \
1269           "Generate extra debugging information for non-safepoints in "     \
1270           "nmethods")                                                       \
1271                                                                             \
1272   product(bool, PrintVMOptions, false,                                      \
1273           "Print flags that appeared on the command line")                  \
1274                                                                             \
1275   product(bool, IgnoreUnrecognizedVMOptions, false,                         \
1276           "Ignore unrecognized VM options")                                 \
1277                                                                             \
1278   product(bool, PrintCommandLineFlags, false,                               \
1279           "Print flags specified on command line or set by ergonomics")     \
1280                                                                             \
1281   product(bool, PrintFlagsInitial, false,                                   \
1282           "Print all VM flags before argument processing and exit VM")      \
1283                                                                             \
1284   product(bool, PrintFlagsFinal, false,                                     \
1285           "Print all VM flags after argument and ergonomic processing")     \
1286                                                                             \
1287   notproduct(bool, PrintFlagsWithComments, false,                           \
1288           "Print all VM flags with default values and descriptions and "    \
1289           "exit")                                                           \
1290                                                                             \
1291   product(bool, PrintFlagsRanges, false,                                    \
1292           "Print VM flags and their ranges and exit VM")                    \
1293                                                                             \
1294   diagnostic(bool, SerializeVMOutput, true,                                 \
1295           "Use a mutex to serialize output to tty and LogFile")             \
1296                                                                             \
1297   diagnostic(bool, DisplayVMOutput, true,                                   \
1298           "Display all VM output on the tty, independently of LogVMOutput") \
1299                                                                             \
1300   diagnostic(bool, LogVMOutput, false,                                      \
1301           "Save VM output to LogFile")                                      \
1302                                                                             \
1303   diagnostic(ccstr, LogFile, NULL,                                          \
1304           "If LogVMOutput or LogCompilation is on, save VM output to "      \
1305           "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
1306                                                                             \
1307   product(ccstr, ErrorFile, NULL,                                           \
1308           "If an error occurs, save the error data to this file "           \
1309           "[default: ./hs_err_pid%p.log] (%p replaced with pid)")           \
1310                                                                             \
1311   product(bool, ExtensiveErrorReports,                                      \
1312                  PRODUCT_ONLY(false) NOT_PRODUCT(true),                     \
1313                  "Error reports are more extensive.")                       \
1314                                                                             \
1315   product(bool, DisplayVMOutputToStderr, false,                             \
1316           "If DisplayVMOutput is true, display all VM output to stderr")    \
1317                                                                             \
1318   product(bool, DisplayVMOutputToStdout, false,                             \
1319           "If DisplayVMOutput is true, display all VM output to stdout")    \
1320                                                                             \
1321   product(bool, ErrorFileToStderr, false,                                   \
1322           "If true, error data is printed to stderr instead of a file")     \
1323                                                                             \
1324   product(bool, ErrorFileToStdout, false,                                   \
1325           "If true, error data is printed to stdout instead of a file")     \
1326                                                                             \
1327   product(bool, UseHeavyMonitors, false,                                    \
1328           "use heavyweight instead of lightweight Java monitors")           \
1329                                                                             \
1330   product(bool, PrintStringTableStatistics, false,                          \
1331           "print statistics about the StringTable and SymbolTable")         \
1332                                                                             \
1333   diagnostic(bool, VerifyStringTableAtExit, false,                          \
1334           "verify StringTable contents at exit")                            \
1335                                                                             \
1336   notproduct(bool, PrintSymbolTableSizeHistogram, false,                    \
1337           "print histogram of the symbol table")                            \
1338                                                                             \
1339   notproduct(bool, ExitVMOnVerifyError, false,                              \
1340           "standard exit from VM if bytecode verify error "                 \
1341           "(only in debug mode)")                                           \
1342                                                                             \
1343   diagnostic(ccstr, AbortVMOnException, NULL,                               \
1344           "Call fatal if this exception is thrown.  Example: "              \
1345           "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
1346                                                                             \
1347   diagnostic(ccstr, AbortVMOnExceptionMessage, NULL,                        \
1348           "Call fatal if the exception pointed by AbortVMOnException "      \
1349           "has this message")                                               \
1350                                                                             \
1351   develop(bool, DebugVtables, false,                                        \
1352           "add debugging code to vtable dispatch")                          \
1353                                                                             \
1354   notproduct(bool, PrintVtableStats, false,                                 \
1355           "print vtables stats at end of run")                              \
1356                                                                             \
1357   develop(bool, TraceCreateZombies, false,                                  \
1358           "trace creation of zombie nmethods")                              \
1359                                                                             \
1360   notproduct(bool, IgnoreLockingAssertions, false,                          \
1361           "disable locking assertions (for speed)")                         \
1362                                                                             \
1363   product(bool, RangeCheckElimination, true,                                \
1364           "Eliminate range checks")                                         \
1365                                                                             \
1366   develop_pd(bool, UncommonNullCast,                                        \
1367           "track occurrences of null in casts; adjust compiler tactics")    \
1368                                                                             \
1369   develop(bool, TypeProfileCasts,  true,                                    \
1370           "treat casts like calls for purposes of type profiling")          \
1371                                                                             \
1372   develop(bool, DelayCompilationDuringStartup, true,                        \
1373           "Delay invoking the compiler until main application class is "    \
1374           "loaded")                                                         \
1375                                                                             \
1376   develop(bool, CompileTheWorld, false,                                     \
1377           "Compile all methods in all classes in bootstrap class path "     \
1378             "(stress test)")                                                \
1379                                                                             \
1380   develop(bool, CompileTheWorldPreloadClasses, true,                        \
1381           "Preload all classes used by a class before start loading")       \
1382                                                                             \
1383   notproduct(intx, CompileTheWorldSafepointInterval, 100,                   \
1384           "Force a safepoint every n compiles so sweeper can keep up")      \
1385                                                                             \
1386   develop(bool, FillDelaySlots, true,                                       \
1387           "Fill delay slots (on SPARC only)")                               \
1388                                                                             \
1389   develop(bool, TimeLivenessAnalysis, false,                                \
1390           "Time computation of bytecode liveness analysis")                 \
1391                                                                             \
1392   develop(bool, TraceLivenessGen, false,                                    \
1393           "Trace the generation of liveness analysis information")          \
1394                                                                             \
1395   notproduct(bool, TraceLivenessQuery, false,                               \
1396           "Trace queries of liveness analysis information")                 \
1397                                                                             \
1398   notproduct(bool, CollectIndexSetStatistics, false,                        \
1399           "Collect information about IndexSets")                            \
1400                                                                             \
1401   develop(bool, UseLoopSafepoints, true,                                    \
1402           "Generate Safepoint nodes in every loop")                         \
1403                                                                             \
1404   develop(intx, FastAllocateSizeLimit, 128*K,                               \
1405           /* Note:  This value is zero mod 1<<13 for a cheap sparc set. */  \
1406           "Inline allocations larger than this in doublewords must go slow")\
1407                                                                             \
1408   product(bool, AggressiveOpts, false,                                      \
1409           "(Deprecated) Enable aggressive optimizations - see arguments.cpp") \
1410                                                                             \
1411   product_pd(bool, CompactStrings,                                          \
1412           "Enable Strings to use single byte chars in backing store")       \
1413                                                                             \
1414   product_pd(uintx, TypeProfileLevel,                                       \
1415           "=XYZ, with Z: Type profiling of arguments at call; "             \
1416                      "Y: Type profiling of return value at call; "          \
1417                      "X: Type profiling of parameters to methods; "         \
1418           "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods")             \
1419           constraint(TypeProfileLevelConstraintFunc, AfterErgo)             \
1420                                                                             \
1421   product(intx, TypeProfileArgsLimit,     2,                                \
1422           "max number of call arguments to consider for type profiling")    \
1423           range(0, 16)                                                      \
1424                                                                             \
1425   product(intx, TypeProfileParmsLimit,    2,                                \
1426           "max number of incoming parameters to consider for type profiling"\
1427           ", -1 for all")                                                   \
1428           range(-1, 64)                                                     \
1429                                                                             \
1430   /* statistics */                                                          \
1431   develop(bool, CountCompiledCalls, false,                                  \
1432           "Count method invocations")                                       \
1433                                                                             \
1434   notproduct(bool, CountRuntimeCalls, false,                                \
1435           "Count VM runtime calls")                                         \
1436                                                                             \
1437   develop(bool, CountJNICalls, false,                                       \
1438           "Count jni method invocations")                                   \
1439                                                                             \
1440   notproduct(bool, CountJVMCalls, false,                                    \
1441           "Count jvm method invocations")                                   \
1442                                                                             \
1443   notproduct(bool, CountRemovableExceptions, false,                         \
1444           "Count exceptions that could be replaced by branches due to "     \
1445           "inlining")                                                       \
1446                                                                             \
1447   notproduct(bool, ICMissHistogram, false,                                  \
1448           "Produce histogram of IC misses")                                 \
1449                                                                             \
1450   /* interpreter */                                                         \
1451   product_pd(bool, RewriteBytecodes,                                        \
1452           "Allow rewriting of bytecodes (bytecodes are not immutable)")     \
1453                                                                             \
1454   product_pd(bool, RewriteFrequentPairs,                                    \
1455           "Rewrite frequently used bytecode pairs into a single bytecode")  \
1456                                                                             \
1457   diagnostic(bool, PrintInterpreter, false,                                 \
1458           "Print the generated interpreter code")                           \
1459                                                                             \
1460   product(bool, UseInterpreter, true,                                       \
1461           "Use interpreter for non-compiled methods")                       \
1462                                                                             \
1463   develop(bool, UseFastSignatureHandlers, true,                             \
1464           "Use fast signature handlers for native calls")                   \
1465                                                                             \
1466   product(bool, UseLoopCounter, true,                                       \
1467           "Increment invocation counter on backward branch")                \
1468                                                                             \
1469   product_pd(bool, UseOnStackReplacement,                                   \
1470           "Use on stack replacement, calls runtime if invoc. counter "      \
1471           "overflows in loop")                                              \
1472                                                                             \
1473   notproduct(bool, TraceOnStackReplacement, false,                          \
1474           "Trace on stack replacement")                                     \
1475                                                                             \
1476   product_pd(bool, PreferInterpreterNativeStubs,                            \
1477           "Use always interpreter stubs for native methods invoked via "    \
1478           "interpreter")                                                    \
1479                                                                             \
1480   develop(bool, CountBytecodes, false,                                      \
1481           "Count number of bytecodes executed")                             \
1482                                                                             \
1483   develop(bool, PrintBytecodeHistogram, false,                              \
1484           "Print histogram of the executed bytecodes")                      \
1485                                                                             \
1486   develop(bool, PrintBytecodePairHistogram, false,                          \
1487           "Print histogram of the executed bytecode pairs")                 \
1488                                                                             \
1489   diagnostic(bool, PrintSignatureHandlers, false,                           \
1490           "Print code generated for native method signature handlers")      \
1491                                                                             \
1492   develop(bool, VerifyOops, false,                                          \
1493           "Do plausibility checks for oops")                                \
1494                                                                             \
1495   develop(bool, CheckUnhandledOops, false,                                  \
1496           "Check for unhandled oops in VM code")                            \
1497                                                                             \
1498   develop(bool, VerifyJNIFields, trueInDebug,                               \
1499           "Verify jfieldIDs for instance fields")                           \
1500                                                                             \
1501   notproduct(bool, VerifyJNIEnvThread, false,                               \
1502           "Verify JNIEnv.thread == Thread::current() when entering VM "     \
1503           "from JNI")                                                       \
1504                                                                             \
1505   develop(bool, VerifyFPU, false,                                           \
1506           "Verify FPU state (check for NaN's, etc.)")                       \
1507                                                                             \
1508   develop(bool, VerifyThread, false,                                        \
1509           "Watch the thread register for corruption (SPARC only)")          \
1510                                                                             \
1511   develop(bool, VerifyActivationFrameSize, false,                           \
1512           "Verify that activation frame didn't become smaller than its "    \
1513           "minimal size")                                                   \
1514                                                                             \
1515   develop(bool, TraceFrequencyInlining, false,                              \
1516           "Trace frequency based inlining")                                 \
1517                                                                             \
1518   develop_pd(bool, InlineIntrinsics,                                        \
1519           "Inline intrinsics that can be statically resolved")              \
1520                                                                             \
1521   product_pd(bool, ProfileInterpreter,                                      \
1522           "Profile at the bytecode level during interpretation")            \
1523                                                                             \
1524   develop(bool, TraceProfileInterpreter, false,                             \
1525           "Trace profiling at the bytecode level during interpretation. "   \
1526           "This outputs the profiling information collected to improve "    \
1527           "jit compilation.")                                               \
1528                                                                             \
1529   develop_pd(bool, ProfileTraps,                                            \
1530           "Profile deoptimization traps at the bytecode level")             \
1531                                                                             \
1532   product(intx, ProfileMaturityPercentage, 20,                              \
1533           "number of method invocations/branches (expressed as % of "       \
1534           "CompileThreshold) before using the method's profile")            \
1535           range(0, 100)                                                     \
1536                                                                             \
1537   diagnostic(bool, PrintMethodData, false,                                  \
1538           "Print the results of +ProfileInterpreter at end of run")         \
1539                                                                             \
1540   develop(bool, VerifyDataPointer, trueInDebug,                             \
1541           "Verify the method data pointer during interpreter profiling")    \
1542                                                                             \
1543   develop(bool, VerifyCompiledCode, false,                                  \
1544           "Include miscellaneous runtime verifications in nmethod code; "   \
1545           "default off because it disturbs nmethod size heuristics")        \
1546                                                                             \
1547   notproduct(bool, CrashGCForDumpingJavaThread, false,                      \
1548           "Manually make GC thread crash then dump java stack trace;  "     \
1549           "Test only")                                                      \
1550                                                                             \
1551   /* compilation */                                                         \
1552   product(bool, UseCompiler, true,                                          \
1553           "Use Just-In-Time compilation")                                   \
1554                                                                             \
1555   develop(bool, TraceCompilationPolicy, false,                              \
1556           "Trace compilation policy")                                       \
1557                                                                             \
1558   develop(bool, TimeCompilationPolicy, false,                               \
1559           "Time the compilation policy")                                    \
1560                                                                             \
1561   product(bool, UseCounterDecay, true,                                      \
1562           "Adjust recompilation counters")                                  \
1563                                                                             \
1564   develop(intx, CounterHalfLifeTime,    30,                                 \
1565           "Half-life time of invocation counters (in seconds)")             \
1566                                                                             \
1567   develop(intx, CounterDecayMinIntervalLength,   500,                       \
1568           "The minimum interval (in milliseconds) between invocation of "   \
1569           "CounterDecay")                                                   \
1570                                                                             \
1571   product(bool, AlwaysCompileLoopMethods, false,                            \
1572           "When using recompilation, never interpret methods "              \
1573           "containing loops")                                               \
1574                                                                             \
1575   product(bool, DontCompileHugeMethods, true,                               \
1576           "Do not compile methods > HugeMethodLimit")                       \
1577                                                                             \
1578   /* Bytecode escape analysis estimation. */                                \
1579   product(bool, EstimateArgEscape, true,                                    \
1580           "Analyze bytecodes to estimate escape state of arguments")        \
1581                                                                             \
1582   product(intx, BCEATraceLevel, 0,                                          \
1583           "How much tracing to do of bytecode escape analysis estimates "   \
1584           "(0-3)")                                                          \
1585           range(0, 3)                                                       \
1586                                                                             \
1587   product(intx, MaxBCEAEstimateLevel, 5,                                    \
1588           "Maximum number of nested calls that are analyzed by BC EA")      \
1589           range(0, max_jint)                                                \
1590                                                                             \
1591   product(intx, MaxBCEAEstimateSize, 150,                                   \
1592           "Maximum bytecode size of a method to be analyzed by BC EA")      \
1593           range(0, max_jint)                                                \
1594                                                                             \
1595   product(intx,  AllocatePrefetchStyle, 1,                                  \
1596           "0 = no prefetch, "                                               \
1597           "1 = generate prefetch instructions for each allocation, "        \
1598           "2 = use TLAB watermark to gate allocation prefetch, "            \
1599           "3 = generate one prefetch instruction per cache line")           \
1600           range(0, 3)                                                       \
1601                                                                             \
1602   product(intx,  AllocatePrefetchDistance, -1,                              \
1603           "Distance to prefetch ahead of allocation pointer. "              \
1604           "-1: use system-specific value (automatically determined")        \
1605           constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\
1606                                                                             \
1607   product(intx,  AllocatePrefetchLines, 3,                                  \
1608           "Number of lines to prefetch ahead of array allocation pointer")  \
1609           range(1, 64)                                                      \
1610                                                                             \
1611   product(intx,  AllocateInstancePrefetchLines, 1,                          \
1612           "Number of lines to prefetch ahead of instance allocation "       \
1613           "pointer")                                                        \
1614           range(1, 64)                                                      \
1615                                                                             \
1616   product(intx,  AllocatePrefetchStepSize, 16,                              \
1617           "Step size in bytes of sequential prefetch instructions")         \
1618           range(1, 512)                                                     \
1619           constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\
1620                                                                             \
1621   product(intx,  AllocatePrefetchInstr, 0,                                  \
1622           "Select instruction to prefetch ahead of allocation pointer")     \
1623           constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit)  \
1624                                                                             \
1625   /* deoptimization */                                                      \
1626   develop(bool, TraceDeoptimization, false,                                 \
1627           "Trace deoptimization")                                           \
1628                                                                             \
1629   develop(bool, PrintDeoptimizationDetails, false,                          \
1630           "Print more information about deoptimization")                    \
1631                                                                             \
1632   develop(bool, DebugDeoptimization, false,                                 \
1633           "Tracing various information while debugging deoptimization")     \
1634                                                                             \
1635   product(intx, SelfDestructTimer, 0,                                       \
1636           "Will cause VM to terminate after a given time (in minutes) "     \
1637           "(0 means off)")                                                  \
1638           range(0, max_intx)                                                \
1639                                                                             \
1640   product(intx, MaxJavaStackTraceDepth, 1024,                               \
1641           "The maximum number of lines in the stack trace for Java "        \
1642           "exceptions (0 means all)")                                       \
1643           range(0, max_jint/2)                                              \
1644                                                                             \
1645   /* notice: the max range value here is max_jint, not max_intx  */         \
1646   /* because of overflow issue                                   */         \
1647   diagnostic(intx, GuaranteedSafepointInterval, 1000,                       \
1648           "Guarantee a safepoint (at least) every so many milliseconds "    \
1649           "(0 means none)")                                                 \
1650           range(0, max_jint)                                                \
1651                                                                             \
1652   product(intx, SafepointTimeoutDelay, 10000,                               \
1653           "Delay in milliseconds for option SafepointTimeout")              \
1654   LP64_ONLY(range(0, max_intx/MICROUNITS))                                  \
1655   NOT_LP64(range(0, max_intx))                                              \
1656                                                                             \
1657   product(intx, NmethodSweepActivity, 10,                                   \
1658           "Removes cold nmethods from code cache if > 0. Higher values "    \
1659           "result in more aggressive sweeping")                             \
1660           range(0, 2000)                                                    \
1661                                                                             \
1662   notproduct(bool, LogSweeper, false,                                       \
1663           "Keep a ring buffer of sweeper activity")                         \
1664                                                                             \
1665   notproduct(intx, SweeperLogEntries, 1024,                                 \
1666           "Number of records in the ring buffer of sweeper activity")       \
1667                                                                             \
1668   notproduct(intx, MemProfilingInterval, 500,                               \
1669           "Time between each invocation of the MemProfiler")                \
1670                                                                             \
1671   develop(intx, MallocCatchPtr, -1,                                         \
1672           "Hit breakpoint when mallocing/freeing this pointer")             \
1673                                                                             \
1674   notproduct(ccstrlist, SuppressErrorAt, "",                                \
1675           "List of assertions (file:line) to muzzle")                       \
1676                                                                             \
1677   develop(intx, StackPrintLimit, 100,                                       \
1678           "number of stack frames to print in VM-level stack dump")         \
1679                                                                             \
1680   notproduct(intx, MaxElementPrintSize, 256,                                \
1681           "maximum number of elements to print")                            \
1682                                                                             \
1683   notproduct(intx, MaxSubklassPrintSize, 4,                                 \
1684           "maximum number of subklasses to print when printing klass")      \
1685                                                                             \
1686   product(intx, MaxInlineLevel, 15,                                         \
1687           "maximum number of nested calls that are inlined")                \
1688           range(0, max_jint)                                                \
1689                                                                             \
1690   product(intx, MaxRecursiveInlineLevel, 1,                                 \
1691           "maximum number of nested recursive calls that are inlined")      \
1692           range(0, max_jint)                                                \
1693                                                                             \
1694   develop(intx, MaxForceInlineLevel, 100,                                   \
1695           "maximum number of nested calls that are forced for inlining "    \
1696           "(using CompileCommand or marked w/ @ForceInline)")               \
1697           range(0, max_jint)                                                \
1698                                                                             \
1699   product_pd(intx, InlineSmallCode,                                         \
1700           "Only inline already compiled methods if their code size is "     \
1701           "less than this")                                                 \
1702           range(0, max_jint)                                                \
1703                                                                             \
1704   product(intx, MaxInlineSize, 35,                                          \
1705           "The maximum bytecode size of a method to be inlined")            \
1706           range(0, max_jint)                                                \
1707                                                                             \
1708   product_pd(intx, FreqInlineSize,                                          \
1709           "The maximum bytecode size of a frequent method to be inlined")   \
1710           range(0, max_jint)                                                \
1711                                                                             \
1712   product(intx, MaxTrivialSize, 6,                                          \
1713           "The maximum bytecode size of a trivial method to be inlined")    \
1714           range(0, max_jint)                                                \
1715                                                                             \
1716   product(intx, MinInliningThreshold, 250,                                  \
1717           "The minimum invocation count a method needs to have to be "      \
1718           "inlined")                                                        \
1719           range(0, max_jint)                                                \
1720                                                                             \
1721   develop(intx, MethodHistogramCutoff, 100,                                 \
1722           "The cutoff value for method invocation histogram (+CountCalls)") \
1723                                                                             \
1724   diagnostic(intx, ProfilerNumberOfInterpretedMethods, 25,                  \
1725           "Number of interpreted methods to show in profile")               \
1726                                                                             \
1727   diagnostic(intx, ProfilerNumberOfCompiledMethods, 25,                     \
1728           "Number of compiled methods to show in profile")                  \
1729                                                                             \
1730   diagnostic(intx, ProfilerNumberOfStubMethods, 25,                         \
1731           "Number of stub methods to show in profile")                      \
1732                                                                             \
1733   diagnostic(intx, ProfilerNumberOfRuntimeStubNodes, 25,                    \
1734           "Number of runtime stub nodes to show in profile")                \
1735                                                                             \
1736   product(intx, ProfileIntervalsTicks, 100,                                 \
1737           "Number of ticks between printing of interval profile "           \
1738           "(+ProfileIntervals)")                                            \
1739           range(0, max_intx)                                                \
1740                                                                             \
1741   develop(intx, DontYieldALotInterval,    10,                               \
1742           "Interval between which yields will be dropped (milliseconds)")   \
1743                                                                             \
1744   develop(intx, ProfilerPCTickThreshold,    15,                             \
1745           "Number of ticks in a PC buckets to be a hotspot")                \
1746                                                                             \
1747   notproduct(intx, DeoptimizeALotInterval,     5,                           \
1748           "Number of exits until DeoptimizeALot kicks in")                  \
1749                                                                             \
1750   notproduct(intx, ZombieALotInterval,     5,                               \
1751           "Number of exits until ZombieALot kicks in")                      \
1752                                                                             \
1753   diagnostic(uintx, MallocMaxTestWords,     0,                              \
1754           "If non-zero, maximum number of words that malloc/realloc can "   \
1755           "allocate (for testing only)")                                    \
1756           range(0, max_uintx)                                               \
1757                                                                             \
1758   product(intx, TypeProfileWidth, 2,                                        \
1759           "Number of receiver types to record in call/cast profile")        \
1760           range(0, 8)                                                       \
1761                                                                             \
1762   develop(intx, BciProfileWidth,      2,                                    \
1763           "Number of return bci's to record in ret profile")                \
1764                                                                             \
1765   product(intx, PerMethodRecompilationCutoff, 400,                          \
1766           "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
1767           range(-1, max_intx)                                               \
1768                                                                             \
1769   product(intx, PerBytecodeRecompilationCutoff, 200,                        \
1770           "Per-BCI limit on repeated recompilation (-1=>'Inf')")            \
1771           range(-1, max_intx)                                               \
1772                                                                             \
1773   product(intx, PerMethodTrapLimit,  100,                                   \
1774           "Limit on traps (of one kind) in a method (includes inlines)")    \
1775           range(0, max_jint)                                                \
1776                                                                             \
1777   experimental(intx, PerMethodSpecTrapLimit,  5000,                         \
1778           "Limit on speculative traps (of one kind) in a method "           \
1779           "(includes inlines)")                                             \
1780           range(0, max_jint)                                                \
1781                                                                             \
1782   product(intx, PerBytecodeTrapLimit,  4,                                   \
1783           "Limit on traps (of one kind) at a particular BCI")               \
1784           range(0, max_jint)                                                \
1785                                                                             \
1786   experimental(intx, SpecTrapLimitExtraEntries,  3,                         \
1787           "Extra method data trap entries for speculation")                 \
1788                                                                             \
1789   develop(intx, InlineFrequencyRatio,    20,                                \
1790           "Ratio of call site execution to caller method invocation")       \
1791           range(0, max_jint)                                                \
1792                                                                             \
1793   diagnostic_pd(intx, InlineFrequencyCount,                                 \
1794           "Count of call site execution necessary to trigger frequent "     \
1795           "inlining")                                                       \
1796           range(0, max_jint)                                                \
1797                                                                             \
1798   develop(intx, InlineThrowCount,    50,                                    \
1799           "Force inlining of interpreted methods that throw this often")    \
1800           range(0, max_jint)                                                \
1801                                                                             \
1802   develop(intx, InlineThrowMaxSize,   200,                                  \
1803           "Force inlining of throwing methods smaller than this")           \
1804           range(0, max_jint)                                                \
1805                                                                             \
1806   develop(intx, ProfilerNodeSize,  1024,                                    \
1807           "Size in K to allocate for the Profile Nodes of each thread")     \
1808           range(0, 1024)                                                    \
1809                                                                             \
1810   product_pd(size_t, MetaspaceSize,                                         \
1811           "Initial threshold (in bytes) at which a garbage collection "     \
1812           "is done to reduce Metaspace usage")                              \
1813           constraint(MetaspaceSizeConstraintFunc,AfterErgo)                 \
1814                                                                             \
1815   product(size_t, MaxMetaspaceSize, max_uintx,                              \
1816           "Maximum size of Metaspaces (in bytes)")                          \
1817           constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo)              \
1818                                                                             \
1819   product(size_t, CompressedClassSpaceSize, 1*G,                            \
1820           "Maximum size of class area in Metaspace when compressed "        \
1821           "class pointers are used")                                        \
1822           range(1*M, 3*G)                                                   \
1823                                                                             \
1824   manageable(uintx, MinHeapFreeRatio, 40,                                   \
1825           "The minimum percentage of heap free after GC to avoid expansion."\
1826           " For most GCs this applies to the old generation. In G1 and"     \
1827           " ParallelGC it applies to the whole heap.")                      \
1828           range(0, 100)                                                     \
1829           constraint(MinHeapFreeRatioConstraintFunc,AfterErgo)              \
1830                                                                             \
1831   manageable(uintx, MaxHeapFreeRatio, 70,                                   \
1832           "The maximum percentage of heap free after GC to avoid shrinking."\
1833           " For most GCs this applies to the old generation. In G1 and"     \
1834           " ParallelGC it applies to the whole heap.")                      \
1835           range(0, 100)                                                     \
1836           constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo)              \
1837                                                                             \
1838   product(bool, ShrinkHeapInSteps, true,                                    \
1839           "When disabled, informs the GC to shrink the java heap directly"  \
1840           " to the target size at the next full GC rather than requiring"   \
1841           " smaller steps during multiple full GCs.")                       \
1842                                                                             \
1843   product(intx, SoftRefLRUPolicyMSPerMB, 1000,                              \
1844           "Number of milliseconds per MB of free space in the heap")        \
1845           range(0, max_intx)                                                \
1846           constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \
1847                                                                             \
1848   product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K),               \
1849           "The minimum change in heap space due to GC (in bytes)")          \
1850           range(0, max_uintx)                                               \
1851                                                                             \
1852   product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K),           \
1853           "The minimum expansion of Metaspace (in bytes)")                  \
1854           range(0, max_uintx)                                               \
1855                                                                             \
1856   product(uintx, MaxMetaspaceFreeRatio,    70,                              \
1857           "The maximum percentage of Metaspace free after GC to avoid "     \
1858           "shrinking")                                                      \
1859           range(0, 100)                                                     \
1860           constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo)         \
1861                                                                             \
1862   product(uintx, MinMetaspaceFreeRatio,    40,                              \
1863           "The minimum percentage of Metaspace free after GC to avoid "     \
1864           "expansion")                                                      \
1865           range(0, 99)                                                      \
1866           constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo)         \
1867                                                                             \
1868   product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M),             \
1869           "The maximum expansion of Metaspace without full GC (in bytes)")  \
1870           range(0, max_uintx)                                               \
1871                                                                             \
1872   /* stack parameters */                                                    \
1873   product_pd(intx, StackYellowPages,                                        \
1874           "Number of yellow zone (recoverable overflows) pages of size "    \
1875           "4KB. If pages are bigger yellow zone is aligned up.")            \
1876           range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5))     \
1877                                                                             \
1878   product_pd(intx, StackRedPages,                                           \
1879           "Number of red zone (unrecoverable overflows) pages of size "     \
1880           "4KB. If pages are bigger red zone is aligned up.")               \
1881           range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2))           \
1882                                                                             \
1883   product_pd(intx, StackReservedPages,                                      \
1884           "Number of reserved zone (reserved to annotated methods) pages"   \
1885           " of size 4KB. If pages are bigger reserved zone is aligned up.") \
1886           range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\
1887                                                                             \
1888   product(bool, RestrictReservedStack, true,                                \
1889           "Restrict @ReservedStackAccess to trusted classes")               \
1890                                                                             \
1891   /* greater stack shadow pages can't generate instruction to bang stack */ \
1892   product_pd(intx, StackShadowPages,                                        \
1893           "Number of shadow zone (for overflow checking) pages of size "    \
1894           "4KB. If pages are bigger shadow zone is aligned up. "            \
1895           "This should exceed the depth of the VM and native call stack.")  \
1896           range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30))    \
1897                                                                             \
1898   product_pd(intx, ThreadStackSize,                                         \
1899           "Thread Stack Size (in Kbytes)")                                  \
1900           range(0, 1 * M)                                                   \
1901                                                                             \
1902   product_pd(intx, VMThreadStackSize,                                       \
1903           "Non-Java Thread Stack Size (in Kbytes)")                         \
1904           range(0, max_intx/(1 * K))                                        \
1905                                                                             \
1906   product_pd(intx, CompilerThreadStackSize,                                 \
1907           "Compiler Thread Stack Size (in Kbytes)")                         \
1908           range(0, max_intx/(1 * K))                                        \
1909                                                                             \
1910   develop_pd(size_t, JVMInvokeMethodSlack,                                  \
1911           "Stack space (bytes) required for JVM_InvokeMethod to complete")  \
1912                                                                             \
1913   /* code cache parameters                                    */            \
1914   develop_pd(uintx, CodeCacheSegmentSize,                                   \
1915           "Code cache segment size (in bytes) - smallest unit of "          \
1916           "allocation")                                                     \
1917           range(1, 1024)                                                    \
1918           constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo)         \
1919                                                                             \
1920   develop_pd(intx, CodeEntryAlignment,                                      \
1921           "Code entry alignment for generated code (in bytes)")             \
1922           constraint(CodeEntryAlignmentConstraintFunc, AfterErgo)           \
1923                                                                             \
1924   product_pd(intx, OptoLoopAlignment,                                       \
1925           "Align inner loops to zero relative to this modulus")             \
1926           range(1, 16)                                                      \
1927           constraint(OptoLoopAlignmentConstraintFunc, AfterErgo)            \
1928                                                                             \
1929   product_pd(uintx, InitialCodeCacheSize,                                   \
1930           "Initial code cache size (in bytes)")                             \
1931           range(os::vm_page_size(), max_uintx)                              \
1932                                                                             \
1933   develop_pd(uintx, CodeCacheMinimumUseSpace,                               \
1934           "Minimum code cache size (in bytes) required to start VM.")       \
1935           range(0, max_uintx)                                               \
1936                                                                             \
1937   product(bool, SegmentedCodeCache, false,                                  \
1938           "Use a segmented code cache")                                     \
1939                                                                             \
1940   product_pd(uintx, ReservedCodeCacheSize,                                  \
1941           "Reserved code cache size (in bytes) - maximum code cache size")  \
1942           range(os::vm_page_size(), max_uintx)                              \
1943                                                                             \
1944   product_pd(uintx, NonProfiledCodeHeapSize,                                \
1945           "Size of code heap with non-profiled methods (in bytes)")         \
1946           range(0, max_uintx)                                               \
1947                                                                             \
1948   product_pd(uintx, ProfiledCodeHeapSize,                                   \
1949           "Size of code heap with profiled methods (in bytes)")             \
1950           range(0, max_uintx)                                               \
1951                                                                             \
1952   product_pd(uintx, NonNMethodCodeHeapSize,                                 \
1953           "Size of code heap with non-nmethods (in bytes)")                 \
1954           range(os::vm_page_size(), max_uintx)                              \
1955                                                                             \
1956   product_pd(uintx, CodeCacheExpansionSize,                                 \
1957           "Code cache expansion size (in bytes)")                           \
1958           range(32*K, max_uintx)                                            \
1959                                                                             \
1960   diagnostic_pd(uintx, CodeCacheMinBlockLength,                             \
1961           "Minimum number of segments in a code cache block")               \
1962           range(1, 100)                                                     \
1963                                                                             \
1964   notproduct(bool, ExitOnFullCodeCache, false,                              \
1965           "Exit the VM if we fill the code cache")                          \
1966                                                                             \
1967   product(bool, UseCodeCacheFlushing, true,                                 \
1968           "Remove cold/old nmethods from the code cache")                   \
1969                                                                             \
1970   product(uintx, StartAggressiveSweepingAt, 10,                             \
1971           "Start aggressive sweeping if X[%] of the code cache is free."    \
1972           "Segmented code cache: X[%] of the non-profiled heap."            \
1973           "Non-segmented code cache: X[%] of the total code cache")         \
1974           range(0, 100)                                                     \
1975                                                                             \
1976   /* AOT parameters */                                                      \
1977   experimental(bool, UseAOT, false,                                         \
1978           "Use AOT compiled files")                                         \
1979                                                                             \
1980   experimental(ccstrlist, AOTLibrary, NULL,                                 \
1981           "AOT library")                                                    \
1982                                                                             \
1983   experimental(bool, PrintAOT, false,                                       \
1984           "Print used AOT klasses and methods")                             \
1985                                                                             \
1986   notproduct(bool, PrintAOTStatistics, false,                               \
1987           "Print AOT statistics")                                           \
1988                                                                             \
1989   diagnostic(bool, UseAOTStrictLoading, false,                              \
1990           "Exit the VM if any of the AOT libraries has invalid config")     \
1991                                                                             \
1992   product(bool, CalculateClassFingerprint, false,                           \
1993           "Calculate class fingerprint")                                    \
1994                                                                             \
1995   /* interpreter debugging */                                               \
1996   develop(intx, BinarySwitchThreshold, 5,                                   \
1997           "Minimal number of lookupswitch entries for rewriting to binary " \
1998           "switch")                                                         \
1999                                                                             \
2000   develop(intx, StopInterpreterAt, 0,                                       \
2001           "Stop interpreter execution at specified bytecode number")        \
2002                                                                             \
2003   develop(intx, TraceBytecodesAt, 0,                                        \
2004           "Trace bytecodes starting with specified bytecode number")        \
2005                                                                             \
2006   /* compiler interface */                                                  \
2007   develop(intx, CIStart, 0,                                                 \
2008           "The id of the first compilation to permit")                      \
2009                                                                             \
2010   develop(intx, CIStop, max_jint,                                           \
2011           "The id of the last compilation to permit")                       \
2012                                                                             \
2013   develop(intx, CIStartOSR, 0,                                              \
2014           "The id of the first osr compilation to permit "                  \
2015           "(CICountOSR must be on)")                                        \
2016                                                                             \
2017   develop(intx, CIStopOSR, max_jint,                                        \
2018           "The id of the last osr compilation to permit "                   \
2019           "(CICountOSR must be on)")                                        \
2020                                                                             \
2021   develop(intx, CIBreakAtOSR, -1,                                           \
2022           "The id of osr compilation to break at")                          \
2023                                                                             \
2024   develop(intx, CIBreakAt, -1,                                              \
2025           "The id of compilation to break at")                              \
2026                                                                             \
2027   product(ccstrlist, CompileOnly, "",                                       \
2028           "List of methods (pkg/class.name) to restrict compilation to")    \
2029                                                                             \
2030   product(ccstr, CompileCommandFile, NULL,                                  \
2031           "Read compiler commands from this file [.hotspot_compiler]")      \
2032                                                                             \
2033   diagnostic(ccstr, CompilerDirectivesFile, NULL,                           \
2034           "Read compiler directives from this file")                        \
2035                                                                             \
2036   product(ccstrlist, CompileCommand, "",                                    \
2037           "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
2038                                                                             \
2039   develop(bool, ReplayCompiles, false,                                      \
2040           "Enable replay of compilations from ReplayDataFile")              \
2041                                                                             \
2042   product(ccstr, ReplayDataFile, NULL,                                      \
2043           "File containing compilation replay information"                  \
2044           "[default: ./replay_pid%p.log] (%p replaced with pid)")           \
2045                                                                             \
2046    product(ccstr, InlineDataFile, NULL,                                     \
2047           "File containing inlining replay information"                     \
2048           "[default: ./inline_pid%p.log] (%p replaced with pid)")           \
2049                                                                             \
2050   develop(intx, ReplaySuppressInitializers, 2,                              \
2051           "Control handling of class initialization during replay: "        \
2052           "0 - don't do anything special; "                                 \
2053           "1 - treat all class initializers as empty; "                     \
2054           "2 - treat class initializers for application classes as empty; " \
2055           "3 - allow all class initializers to run during bootstrap but "   \
2056           "    pretend they are empty after starting replay")               \
2057           range(0, 3)                                                       \
2058                                                                             \
2059   develop(bool, ReplayIgnoreInitErrors, false,                              \
2060           "Ignore exceptions thrown during initialization for replay")      \
2061                                                                             \
2062   product(bool, DumpReplayDataOnError, true,                                \
2063           "Record replay data for crashing compiler threads")               \
2064                                                                             \
2065   product(bool, CICompilerCountPerCPU, false,                               \
2066           "1 compiler thread for log(N CPUs)")                              \
2067                                                                             \
2068   develop(intx, CIFireOOMAt,    -1,                                         \
2069           "Fire OutOfMemoryErrors throughout CI for testing the compiler "  \
2070           "(non-negative value throws OOM after this many CI accesses "     \
2071           "in each compile)")                                               \
2072   notproduct(intx, CICrashAt, -1,                                           \
2073           "id of compilation to trigger assert in compiler thread for "     \
2074           "the purpose of testing, e.g. generation of replay data")         \
2075   notproduct(bool, CIObjectFactoryVerify, false,                            \
2076           "enable potentially expensive verification in ciObjectFactory")   \
2077                                                                             \
2078   diagnostic(bool, AbortVMOnCompilationFailure, false,                      \
2079           "Abort VM when method had failed to compile.")                    \
2080                                                                             \
2081   /* Priorities */                                                          \
2082   product_pd(bool, UseThreadPriorities,  "Use native thread priorities")    \
2083                                                                             \
2084   product(intx, ThreadPriorityPolicy, 0,                                    \
2085           "0 : Normal.                                                     "\
2086           "    VM chooses priorities that are appropriate for normal       "\
2087           "    applications. On Solaris NORM_PRIORITY and above are mapped "\
2088           "    to normal native priority. Java priorities below "           \
2089           "    NORM_PRIORITY map to lower native priority values. On       "\
2090           "    Windows applications are allowed to use higher native       "\
2091           "    priorities. However, with ThreadPriorityPolicy=0, VM will   "\
2092           "    not use the highest possible native priority,               "\
2093           "    THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with     "\
2094           "    system threads. On Linux thread priorities are ignored      "\
2095           "    because the OS does not support static priority in          "\
2096           "    SCHED_OTHER scheduling class which is the only choice for   "\
2097           "    non-root, non-realtime applications.                        "\
2098           "1 : Aggressive.                                                 "\
2099           "    Java thread priorities map over to the entire range of      "\
2100           "    native thread priorities. Higher Java thread priorities map "\
2101           "    to higher native thread priorities. This policy should be   "\
2102           "    used with care, as sometimes it can cause performance       "\
2103           "    degradation in the application and/or the entire system. On "\
2104           "    Linux/BSD/macOS this policy requires root privilege or an   "\
2105           "    extended capability.")                                       \
2106           range(0, 1)                                                       \
2107                                                                             \
2108   product(bool, ThreadPriorityVerbose, false,                               \
2109           "Print priority changes")                                         \
2110                                                                             \
2111   product(intx, CompilerThreadPriority, -1,                                 \
2112           "The native priority at which compiler threads should run "       \
2113           "(-1 means no change)")                                           \
2114           range(min_jint, max_jint)                                         \
2115           constraint(CompilerThreadPriorityConstraintFunc, AfterErgo)       \
2116                                                                             \
2117   product(intx, VMThreadPriority, -1,                                       \
2118           "The native priority at which the VM thread should run "          \
2119           "(-1 means no change)")                                           \
2120           range(-1, 127)                                                    \
2121                                                                             \
2122   product(bool, CompilerThreadHintNoPreempt, false,                         \
2123           "(Solaris only) Give compiler threads an extra quanta")           \
2124                                                                             \
2125   product(bool, VMThreadHintNoPreempt, false,                               \
2126           "(Solaris only) Give VM thread an extra quanta")                  \
2127                                                                             \
2128   product(intx, JavaPriority1_To_OSPriority, -1,                            \
2129           "Map Java priorities to OS priorities")                           \
2130           range(-1, 127)                                                    \
2131                                                                             \
2132   product(intx, JavaPriority2_To_OSPriority, -1,                            \
2133           "Map Java priorities to OS priorities")                           \
2134           range(-1, 127)                                                    \
2135                                                                             \
2136   product(intx, JavaPriority3_To_OSPriority, -1,                            \
2137           "Map Java priorities to OS priorities")                           \
2138           range(-1, 127)                                                    \
2139                                                                             \
2140   product(intx, JavaPriority4_To_OSPriority, -1,                            \
2141           "Map Java priorities to OS priorities")                           \
2142           range(-1, 127)                                                    \
2143                                                                             \
2144   product(intx, JavaPriority5_To_OSPriority, -1,                            \
2145           "Map Java priorities to OS priorities")                           \
2146           range(-1, 127)                                                    \
2147                                                                             \
2148   product(intx, JavaPriority6_To_OSPriority, -1,                            \
2149           "Map Java priorities to OS priorities")                           \
2150           range(-1, 127)                                                    \
2151                                                                             \
2152   product(intx, JavaPriority7_To_OSPriority, -1,                            \
2153           "Map Java priorities to OS priorities")                           \
2154           range(-1, 127)                                                    \
2155                                                                             \
2156   product(intx, JavaPriority8_To_OSPriority, -1,                            \
2157           "Map Java priorities to OS priorities")                           \
2158           range(-1, 127)                                                    \
2159                                                                             \
2160   product(intx, JavaPriority9_To_OSPriority, -1,                            \
2161           "Map Java priorities to OS priorities")                           \
2162           range(-1, 127)                                                    \
2163                                                                             \
2164   product(intx, JavaPriority10_To_OSPriority,-1,                            \
2165           "Map Java priorities to OS priorities")                           \
2166           range(-1, 127)                                                    \
2167                                                                             \
2168   experimental(bool, UseCriticalJavaThreadPriority, false,                  \
2169           "Java thread priority 10 maps to critical scheduling priority")   \
2170                                                                             \
2171   experimental(bool, UseCriticalCompilerThreadPriority, false,              \
2172           "Compiler thread(s) run at critical scheduling priority")         \
2173                                                                             \
2174   experimental(bool, UseCriticalCMSThreadPriority, false,                   \
2175           "ConcurrentMarkSweep thread runs at critical scheduling priority")\
2176                                                                             \
2177   /* compiler debugging */                                                  \
2178   notproduct(intx, CompileTheWorldStartAt,     1,                           \
2179           "First class to consider when using +CompileTheWorld")            \
2180                                                                             \
2181   notproduct(intx, CompileTheWorldStopAt, max_jint,                         \
2182           "Last class to consider when using +CompileTheWorld")             \
2183                                                                             \
2184   develop(intx, NewCodeParameter,      0,                                   \
2185           "Testing Only: Create a dedicated integer parameter before "      \
2186           "putback")                                                        \
2187                                                                             \
2188   /* new oopmap storage allocation */                                       \
2189   develop(intx, MinOopMapAllocation,     8,                                 \
2190           "Minimum number of OopMap entries in an OopMapSet")               \
2191                                                                             \
2192   /* Background Compilation */                                              \
2193   develop(intx, LongCompileThreshold,     50,                               \
2194           "Used with +TraceLongCompiles")                                   \
2195                                                                             \
2196   /* recompilation */                                                       \
2197   product_pd(intx, CompileThreshold,                                        \
2198           "number of interpreted method invocations before (re-)compiling") \
2199           constraint(CompileThresholdConstraintFunc, AfterErgo)             \
2200                                                                             \
2201   product(double, CompileThresholdScaling, 1.0,                             \
2202           "Factor to control when first compilation happens "               \
2203           "(both with and without tiered compilation): "                    \
2204           "values greater than 1.0 delay counter overflow, "                \
2205           "values between 0 and 1.0 rush counter overflow, "                \
2206           "value of 1.0 leaves compilation thresholds unchanged "           \
2207           "value of 0.0 is equivalent to -Xint. "                           \
2208           ""                                                                \
2209           "Flag can be set as per-method option. "                          \
2210           "If a value is specified for a method, compilation thresholds "   \
2211           "for that method are scaled by both the value of the global flag "\
2212           "and the value of the per-method flag.")                          \
2213           range(0.0, DBL_MAX)                                               \
2214                                                                             \
2215   product(intx, Tier0InvokeNotifyFreqLog, 7,                                \
2216           "Interpreter (tier 0) invocation notification frequency")         \
2217           range(0, 30)                                                      \
2218                                                                             \
2219   product(intx, Tier2InvokeNotifyFreqLog, 11,                               \
2220           "C1 without MDO (tier 2) invocation notification frequency")      \
2221           range(0, 30)                                                      \
2222                                                                             \
2223   product(intx, Tier3InvokeNotifyFreqLog, 10,                               \
2224           "C1 with MDO profiling (tier 3) invocation notification "         \
2225           "frequency")                                                      \
2226           range(0, 30)                                                      \
2227                                                                             \
2228   product(intx, Tier23InlineeNotifyFreqLog, 20,                             \
2229           "Inlinee invocation (tiers 2 and 3) notification frequency")      \
2230           range(0, 30)                                                      \
2231                                                                             \
2232   product(intx, Tier0BackedgeNotifyFreqLog, 10,                             \
2233           "Interpreter (tier 0) invocation notification frequency")         \
2234           range(0, 30)                                                      \
2235                                                                             \
2236   product(intx, Tier2BackedgeNotifyFreqLog, 14,                             \
2237           "C1 without MDO (tier 2) invocation notification frequency")      \
2238           range(0, 30)                                                      \
2239                                                                             \
2240   product(intx, Tier3BackedgeNotifyFreqLog, 13,                             \
2241           "C1 with MDO profiling (tier 3) invocation notification "         \
2242           "frequency")                                                      \
2243           range(0, 30)                                                      \
2244                                                                             \
2245   product(intx, Tier2CompileThreshold, 0,                                   \
2246           "threshold at which tier 2 compilation is invoked")               \
2247           range(0, max_jint)                                                \
2248                                                                             \
2249   product(intx, Tier2BackEdgeThreshold, 0,                                  \
2250           "Back edge threshold at which tier 2 compilation is invoked")     \
2251           range(0, max_jint)                                                \
2252                                                                             \
2253   product(intx, Tier3InvocationThreshold, 200,                              \
2254           "Compile if number of method invocations crosses this "           \
2255           "threshold")                                                      \
2256           range(0, max_jint)                                                \
2257                                                                             \
2258   product(intx, Tier3MinInvocationThreshold, 100,                           \
2259           "Minimum invocation to compile at tier 3")                        \
2260           range(0, max_jint)                                                \
2261                                                                             \
2262   product(intx, Tier3CompileThreshold, 2000,                                \
2263           "Threshold at which tier 3 compilation is invoked (invocation "   \
2264           "minimum must be satisfied)")                                     \
2265           range(0, max_jint)                                                \
2266                                                                             \
2267   product(intx, Tier3BackEdgeThreshold,  60000,                             \
2268           "Back edge threshold at which tier 3 OSR compilation is invoked") \
2269           range(0, max_jint)                                                \
2270                                                                             \
2271   product(intx, Tier3AOTInvocationThreshold, 10000,                         \
2272           "Compile if number of method invocations crosses this "           \
2273           "threshold if coming from AOT")                                   \
2274           range(0, max_jint)                                                \
2275                                                                             \
2276   product(intx, Tier3AOTMinInvocationThreshold, 1000,                       \
2277           "Minimum invocation to compile at tier 3 if coming from AOT")     \
2278           range(0, max_jint)                                                \
2279                                                                             \
2280   product(intx, Tier3AOTCompileThreshold, 15000,                            \
2281           "Threshold at which tier 3 compilation is invoked (invocation "   \
2282           "minimum must be satisfied) if coming from AOT")                  \
2283           range(0, max_jint)                                                \
2284                                                                             \
2285   product(intx, Tier3AOTBackEdgeThreshold,  120000,                         \
2286           "Back edge threshold at which tier 3 OSR compilation is invoked " \
2287           "if coming from AOT")                                             \
2288           range(0, max_jint)                                                \
2289                                                                             \
2290   product(intx, Tier4InvocationThreshold, 5000,                             \
2291           "Compile if number of method invocations crosses this "           \
2292           "threshold")                                                      \
2293           range(0, max_jint)                                                \
2294                                                                             \
2295   product(intx, Tier4MinInvocationThreshold, 600,                           \
2296           "Minimum invocation to compile at tier 4")                        \
2297           range(0, max_jint)                                                \
2298                                                                             \
2299   product(intx, Tier4CompileThreshold, 15000,                               \
2300           "Threshold at which tier 4 compilation is invoked (invocation "   \
2301           "minimum must be satisfied")                                      \
2302           range(0, max_jint)                                                \
2303                                                                             \
2304   product(intx, Tier4BackEdgeThreshold, 40000,                              \
2305           "Back edge threshold at which tier 4 OSR compilation is invoked") \
2306           range(0, max_jint)                                                \
2307                                                                             \
2308   product(intx, Tier3DelayOn, 5,                                            \
2309           "If C2 queue size grows over this amount per compiler thread "    \
2310           "stop compiling at tier 3 and start compiling at tier 2")         \
2311           range(0, max_jint)                                                \
2312                                                                             \
2313   product(intx, Tier3DelayOff, 2,                                           \
2314           "If C2 queue size is less than this amount per compiler thread "  \
2315           "allow methods compiled at tier 2 transition to tier 3")          \
2316           range(0, max_jint)                                                \
2317                                                                             \
2318   product(intx, Tier3LoadFeedback, 5,                                       \
2319           "Tier 3 thresholds will increase twofold when C1 queue size "     \
2320           "reaches this amount per compiler thread")                        \
2321           range(0, max_jint)                                                \
2322                                                                             \
2323   product(intx, Tier4LoadFeedback, 3,                                       \
2324           "Tier 4 thresholds will increase twofold when C2 queue size "     \
2325           "reaches this amount per compiler thread")                        \
2326           range(0, max_jint)                                                \
2327                                                                             \
2328   product(intx, TieredCompileTaskTimeout, 50,                               \
2329           "Kill compile task if method was not used within "                \
2330           "given timeout in milliseconds")                                  \
2331           range(0, max_intx)                                                \
2332                                                                             \
2333   product(intx, TieredStopAtLevel, 4,                                       \
2334           "Stop at given compilation level")                                \
2335           range(0, 4)                                                       \
2336                                                                             \
2337   product(intx, Tier0ProfilingStartPercentage, 200,                         \
2338           "Start profiling in interpreter if the counters exceed tier 3 "   \
2339           "thresholds by the specified percentage")                         \
2340           range(0, max_jint)                                                \
2341                                                                             \
2342   product(uintx, IncreaseFirstTierCompileThresholdAt, 50,                   \
2343           "Increase the compile threshold for C1 compilation if the code "  \
2344           "cache is filled by the specified percentage")                    \
2345           range(0, 99)                                                      \
2346                                                                             \
2347   product(intx, TieredRateUpdateMinTime, 1,                                 \
2348           "Minimum rate sampling interval (in milliseconds)")               \
2349           range(0, max_intx)                                                \
2350                                                                             \
2351   product(intx, TieredRateUpdateMaxTime, 25,                                \
2352           "Maximum rate sampling interval (in milliseconds)")               \
2353           range(0, max_intx)                                                \
2354                                                                             \
2355   product_pd(bool, TieredCompilation,                                       \
2356           "Enable tiered compilation")                                      \
2357                                                                             \
2358   product(bool, PrintTieredEvents, false,                                   \
2359           "Print tiered events notifications")                              \
2360                                                                             \
2361   product_pd(intx, OnStackReplacePercentage,                                \
2362           "NON_TIERED number of method invocations/branches (expressed as " \
2363           "% of CompileThreshold) before (re-)compiling OSR code")          \
2364           constraint(OnStackReplacePercentageConstraintFunc, AfterErgo)     \
2365                                                                             \
2366   product(intx, InterpreterProfilePercentage, 33,                           \
2367           "NON_TIERED number of method invocations/branches (expressed as " \
2368           "% of CompileThreshold) before profiling in the interpreter")     \
2369           range(0, 100)                                                     \
2370                                                                             \
2371   develop(intx, MaxRecompilationSearchLength,    10,                        \
2372           "The maximum number of frames to inspect when searching for "     \
2373           "recompilee")                                                     \
2374                                                                             \
2375   develop(intx, MaxInterpretedSearchLength,     3,                          \
2376           "The maximum number of interpreted frames to skip when searching "\
2377           "for recompilee")                                                 \
2378                                                                             \
2379   develop(intx, DesiredMethodLimit,  8000,                                  \
2380           "The desired maximum method size (in bytecodes) after inlining")  \
2381                                                                             \
2382   develop(intx, HugeMethodLimit,  8000,                                     \
2383           "Don't compile methods larger than this if "                      \
2384           "+DontCompileHugeMethods")                                        \
2385                                                                             \
2386   /* New JDK 1.4 reflection implementation */                               \
2387                                                                             \
2388   develop(intx, FastSuperclassLimit, 8,                                     \
2389           "Depth of hardwired instanceof accelerator array")                \
2390                                                                             \
2391   /* Properties for Java libraries  */                                      \
2392                                                                             \
2393   product(uint64_t, MaxDirectMemorySize, 0,                                 \
2394           "Maximum total size of NIO direct-buffer allocations")            \
2395           range(0, max_jlong)                                               \
2396                                                                             \
2397   /* Flags used for temporary code during development  */                   \
2398                                                                             \
2399   diagnostic(bool, UseNewCode, false,                                       \
2400           "Testing Only: Use the new version while testing")                \
2401                                                                             \
2402   diagnostic(bool, UseNewCode2, false,                                      \
2403           "Testing Only: Use the new version while testing")                \
2404                                                                             \
2405   diagnostic(bool, UseNewCode3, false,                                      \
2406           "Testing Only: Use the new version while testing")                \
2407                                                                             \
2408   /* flags for performance data collection */                               \
2409                                                                             \
2410   product(bool, UsePerfData, true,                                          \
2411           "Flag to disable jvmstat instrumentation for performance testing "\
2412           "and problem isolation purposes")                                 \
2413                                                                             \
2414   product(bool, PerfDataSaveToFile, false,                                  \
2415           "Save PerfData memory to hsperfdata_<pid> file on exit")          \
2416                                                                             \
2417   product(ccstr, PerfDataSaveFile, NULL,                                    \
2418           "Save PerfData memory to the specified absolute pathname. "       \
2419           "The string %p in the file name (if present) "                    \
2420           "will be replaced by pid")                                        \
2421                                                                             \
2422   product(intx, PerfDataSamplingInterval, 50,                               \
2423           "Data sampling interval (in milliseconds)")                       \
2424           range(PeriodicTask::min_interval, max_jint)                       \
2425           constraint(PerfDataSamplingIntervalFunc, AfterErgo)               \
2426                                                                             \
2427   product(bool, PerfDisableSharedMem, false,                                \
2428           "Store performance data in standard memory")                      \
2429                                                                             \
2430   product(intx, PerfDataMemorySize, 32*K,                                   \
2431           "Size of performance data memory region. Will be rounded "        \
2432           "up to a multiple of the native os page size.")                   \
2433           range(128, 32*64*K)                                               \
2434                                                                             \
2435   product(intx, PerfMaxStringConstLength, 1024,                             \
2436           "Maximum PerfStringConstant string length before truncation")     \
2437           range(32, 32*K)                                                   \
2438                                                                             \
2439   product(bool, PerfAllowAtExitRegistration, false,                         \
2440           "Allow registration of atexit() methods")                         \
2441                                                                             \
2442   product(bool, PerfBypassFileSystemCheck, false,                           \
2443           "Bypass Win32 file system criteria checks (Windows Only)")        \
2444                                                                             \
2445   product(intx, UnguardOnExecutionViolation, 0,                             \
2446           "Unguard page and retry on no-execute fault (Win32 only) "        \
2447           "0=off, 1=conservative, 2=aggressive")                            \
2448           range(0, 2)                                                       \
2449                                                                             \
2450   /* Serviceability Support */                                              \
2451                                                                             \
2452   product(bool, ManagementServer, false,                                    \
2453           "Create JMX Management Server")                                   \
2454                                                                             \
2455   product(bool, DisableAttachMechanism, false,                              \
2456           "Disable mechanism that allows tools to attach to this VM")       \
2457                                                                             \
2458   product(bool, StartAttachListener, false,                                 \
2459           "Always start Attach Listener at VM startup")                     \
2460                                                                             \
2461   product(bool, EnableDynamicAgentLoading, true,                            \
2462           "Allow tools to load agents with the attach mechanism")           \
2463                                                                             \
2464   manageable(bool, PrintConcurrentLocks, false,                             \
2465           "Print java.util.concurrent locks in thread dump")                \
2466                                                                             \
2467   product(bool, TransmitErrorReport, false,                                 \
2468           "Enable error report transmission on erroneous termination")      \
2469                                                                             \
2470   product(ccstr, ErrorReportServer, NULL,                                   \
2471           "Override built-in error report server address")                  \
2472                                                                             \
2473   /* Shared spaces */                                                       \
2474                                                                             \
2475   product(bool, UseSharedSpaces, true,                                      \
2476           "Use shared spaces for metadata")                                 \
2477                                                                             \
2478   product(bool, VerifySharedSpaces, false,                                  \
2479           "Verify shared spaces (false for default archive, true for "      \
2480           "archive specified by -XX:SharedArchiveFile)")                    \
2481                                                                             \
2482   product(bool, RequireSharedSpaces, false,                                 \
2483           "Require shared spaces for metadata")                             \
2484                                                                             \
2485   product(bool, DumpSharedSpaces, false,                                    \
2486           "Special mode: JVM reads a class list, loads classes, builds "    \
2487           "shared spaces, and dumps the shared spaces to a file to be "     \
2488           "used in future JVM runs")                                        \
2489                                                                             \
2490   product(bool, PrintSharedArchiveAndExit, false,                           \
2491           "Print shared archive file contents")                             \
2492                                                                             \
2493   product(bool, PrintSharedDictionary, false,                               \
2494           "If PrintSharedArchiveAndExit is true, also print the shared "    \
2495           "dictionary")                                                     \
2496                                                                             \
2497   product(size_t, SharedBaseAddress, LP64_ONLY(32*G)                        \
2498           NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)),                           \
2499           "Address to allocate shared memory region for class data")        \
2500           range(0, SIZE_MAX)                                                \
2501                                                                             \
2502   product(ccstr, SharedArchiveConfigFile, NULL,                             \
2503           "Data to add to the CDS archive file")                            \
2504                                                                             \
2505   product(uintx, SharedSymbolTableBucketSize, 4,                            \
2506           "Average number of symbols per bucket in shared table")           \
2507           range(2, 246)                                                     \
2508                                                                             \
2509   diagnostic(bool, IgnoreUnverifiableClassesDuringDump, true,              \
2510           "Do not quit -Xshare:dump even if we encounter unverifiable "     \
2511           "classes. Just exclude them from the shared dictionary.")         \
2512                                                                             \
2513   diagnostic(bool, PrintMethodHandleStubs, false,                           \
2514           "Print generated stub code for method handles")                   \
2515                                                                             \
2516   develop(bool, TraceMethodHandles, false,                                  \
2517           "trace internal method handle operations")                        \
2518                                                                             \
2519   diagnostic(bool, VerifyMethodHandles, trueInDebug,                        \
2520           "perform extra checks when constructing method handles")          \
2521                                                                             \
2522   diagnostic(bool, ShowHiddenFrames, false,                                 \
2523           "show method handle implementation frames (usually hidden)")      \
2524                                                                             \
2525   experimental(bool, TrustFinalNonStaticFields, false,                      \
2526           "trust final non-static declarations for constant folding")       \
2527                                                                             \
2528   diagnostic(bool, FoldStableValues, true,                                  \
2529           "Optimize loads from stable fields (marked w/ @Stable)")          \
2530                                                                             \
2531   develop(bool, TraceInvokeDynamic, false,                                  \
2532           "trace internal invoke dynamic operations")                       \
2533                                                                             \
2534   diagnostic(int, UseBootstrapCallInfo, 1,                                  \
2535           "0: when resolving InDy or ConDy, force all BSM arguments to be " \
2536           "resolved before the bootstrap method is called; 1: when a BSM "  \
2537           "that may accept a BootstrapCallInfo is detected, use that API "  \
2538           "to pass BSM arguments, which allows the BSM to delay their "     \
2539           "resolution; 2+: stress test the BCI API by calling more BSMs "   \
2540           "via that API, instead of with the eagerly-resolved array.")      \
2541                                                                             \
2542   diagnostic(bool, PauseAtStartup,      false,                              \
2543           "Causes the VM to pause at startup time and wait for the pause "  \
2544           "file to be removed (default: ./vm.paused.<pid>)")                \
2545                                                                             \
2546   diagnostic(ccstr, PauseAtStartupFile, NULL,                               \
2547           "The file to create and for whose removal to await when pausing " \
2548           "at startup. (default: ./vm.paused.<pid>)")                       \
2549                                                                             \
2550   diagnostic(bool, PauseAtExit, false,                                      \
2551           "Pause and wait for keypress on exit if a debugger is attached")  \
2552                                                                             \
2553   product(bool, ExtendedDTraceProbes,    false,                             \
2554           "Enable performance-impacting dtrace probes")                     \
2555                                                                             \
2556   product(bool, DTraceMethodProbes, false,                                  \
2557           "Enable dtrace probes for method-entry and method-exit")          \
2558                                                                             \
2559   product(bool, DTraceAllocProbes, false,                                   \
2560           "Enable dtrace probes for object allocation")                     \
2561                                                                             \
2562   product(bool, DTraceMonitorProbes, false,                                 \
2563           "Enable dtrace probes for monitor events")                        \
2564                                                                             \
2565   product(bool, RelaxAccessControlCheck, false,                             \
2566           "Relax the access control checks in the verifier")                \
2567                                                                             \
2568   product(uintx, StringTableSize, defaultStringTableSize,                   \
2569           "Number of buckets in the interned String table "                 \
2570           "(will be rounded to nearest higher power of 2)")                 \
2571           range(minimumStringTableSize, 16777216ul)                         \
2572                                                                             \
2573   experimental(uintx, SymbolTableSize, defaultSymbolTableSize,              \
2574           "Number of buckets in the JVM internal Symbol table")             \
2575           range(minimumSymbolTableSize, 111*defaultSymbolTableSize)         \
2576                                                                             \
2577   product(bool, UseStringDeduplication, false,                              \
2578           "Use string deduplication")                                       \
2579                                                                             \
2580   product(uintx, StringDeduplicationAgeThreshold, 3,                        \
2581           "A string must reach this age (or be promoted to an old region) " \
2582           "to be considered for deduplication")                             \
2583           range(1, markOopDesc::max_age)                                    \
2584                                                                             \
2585   diagnostic(bool, StringDeduplicationResizeALot, false,                    \
2586           "Force table resize every time the table is scanned")             \
2587                                                                             \
2588   diagnostic(bool, StringDeduplicationRehashALot, false,                    \
2589           "Force table rehash every time the table is scanned")             \
2590                                                                             \
2591   diagnostic(bool, WhiteBoxAPI, false,                                      \
2592           "Enable internal testing APIs")                                   \
2593                                                                             \
2594   experimental(intx, SurvivorAlignmentInBytes, 0,                           \
2595            "Default survivor space alignment in bytes")                     \
2596            constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo)     \
2597                                                                             \
2598   product(bool , AllowNonVirtualCalls, false,                               \
2599           "Obey the ACC_SUPER flag and allow invokenonvirtual calls")       \
2600                                                                             \
2601   product(ccstr, DumpLoadedClassList, NULL,                                 \
2602           "Dump the names all loaded classes, that could be stored into "   \
2603           "the CDS archive, in the specified file")                         \
2604                                                                             \
2605   product(ccstr, SharedClassListFile, NULL,                                 \
2606           "Override the default CDS class list")                            \
2607                                                                             \
2608   product(ccstr, SharedArchiveFile, NULL,                                   \
2609           "Override the default location of the CDS archive file")          \
2610                                                                             \
2611   product(ccstr, ExtraSharedClassListFile, NULL,                            \
2612           "Extra classlist for building the CDS archive file")              \
2613                                                                             \
2614   experimental(size_t, ArrayAllocatorMallocLimit,                           \
2615           SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1),                       \
2616           "Allocation less than this value will be allocated "              \
2617           "using malloc. Larger allocations will use mmap.")                \
2618                                                                             \
2619   experimental(bool, AlwaysAtomicAccesses, false,                           \
2620           "Accesses to all variables should always be atomic")              \
2621                                                                             \
2622   diagnostic(bool, UseUnalignedAccesses, false,                             \
2623           "Use unaligned memory accesses in Unsafe")                        \
2624                                                                             \
2625   product_pd(bool, PreserveFramePointer,                                    \
2626              "Use the FP register for holding the frame pointer "           \
2627              "and not as a general purpose register.")                      \
2628                                                                             \
2629   diagnostic(bool, CheckIntrinsics, true,                                   \
2630              "When a class C is loaded, check that "                        \
2631              "(1) all intrinsics defined by the VM for class C are present "\
2632              "in the loaded class file and are marked with the "            \
2633              "@HotSpotIntrinsicCandidate annotation, that "                 \
2634              "(2) there is an intrinsic registered for all loaded methods " \
2635              "that are annotated with the @HotSpotIntrinsicCandidate "      \
2636              "annotation, and that "                                        \
2637              "(3) no orphan methods exist for class C (i.e., methods for "  \
2638              "which the VM declares an intrinsic but that are not declared "\
2639              "in the loaded class C. "                                      \
2640              "Check (3) is available only in debug builds.")                \
2641                                                                             \
2642   diagnostic_pd(intx, InitArrayShortSize,                                   \
2643           "Threshold small size (in bytes) for clearing arrays. "           \
2644           "Anything this size or smaller may get converted to discrete "    \
2645           "scalar stores.")                                                 \
2646           range(0, max_intx)                                                \
2647           constraint(InitArrayShortSizeConstraintFunc, AfterErgo)           \
2648                                                                             \
2649   diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false,          \
2650              "Disable backwards compatibility for compile commands.")       \
2651                                                                             \
2652   diagnostic(bool, CompilerDirectivesPrint, false,                          \
2653              "Print compiler directives on installation.")                  \
2654   diagnostic(int,  CompilerDirectivesLimit, 50,                             \
2655              "Limit on number of compiler directives.")                     \
2656                                                                             \
2657   product(ccstr, AllocateHeapAt, NULL,                                      \
2658           "Path to the directoy where a temporary file will be created "    \
2659           "to use as the backing store for Java Heap.")                     \
2660                                                                             \
2661   develop(bool, VerifyMetaspace, false,                                     \
2662           "Verify metaspace on chunk movements.")                           \
2663                                                                             \
2664   diagnostic(bool, ShowRegistersOnAssert, false,                            \
2665           "On internal errors, include registers in error report.")         \
2666                                                                             \
2667   diagnostic(bool, UseSwitchProfiling, true,                                \
2668           "leverage profiling for table/lookup switch")                     \
2669                                                                             \
2670   JFR_ONLY(product(bool, FlightRecorder, false,                             \
2671           "Enable Flight Recorder"))                                        \
2672                                                                             \
2673   JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL,                      \
2674           "Flight Recorder options"))                                       \
2675                                                                             \
2676   JFR_ONLY(product(ccstr, StartFlightRecording, NULL,                       \
2677           "Start flight recording with options"))                           \
2678                                                                             \
2679   experimental(bool, UseFastUnorderedTimeStamps, false,                     \
2680           "Use platform unstable time where supported for timestamps only")
2681 
2682 #define VM_FLAGS(develop,                                                   \
2683                  develop_pd,                                                \
2684                  product,                                                   \
2685                  product_pd,                                                \
2686                  diagnostic,                                                \
2687                  diagnostic_pd,                                             \
2688                  experimental,                                              \
2689                  notproduct,                                                \
2690                  manageable,                                                \
2691                  product_rw,                                                \
2692                  lp64_product,                                              \
2693                  range,                                                     \
2694                  constraint,                                                \
2695                  writeable)                                                 \
2696                                                                             \
2697   RUNTIME_FLAGS(                                                            \
2698     develop,                                                                \
2699     develop_pd,                                                             \
2700     product,                                                                \
2701     product_pd,                                                             \
2702     diagnostic,                                                             \
2703     diagnostic_pd,                                                          \
2704     experimental,                                                           \
2705     notproduct,                                                             \
2706     manageable,                                                             \
2707     product_rw,                                                             \
2708     lp64_product,                                                           \
2709     range,                                                                  \
2710     constraint,                                                             \
2711     writeable)                                                              \
2712                                                                             \
2713   GC_FLAGS(                                                                 \
2714     develop,                                                                \
2715     develop_pd,                                                             \
2716     product,                                                                \
2717     product_pd,                                                             \
2718     diagnostic,                                                             \
2719     diagnostic_pd,                                                          \
2720     experimental,                                                           \
2721     notproduct,                                                             \
2722     manageable,                                                             \
2723     product_rw,                                                             \
2724     lp64_product,                                                           \
2725     range,                                                                  \
2726     constraint,                                                             \
2727     writeable)                                                              \
2728 
2729 /*
2730  *  Macros for factoring of globals
2731  */
2732 
2733 // Interface macros
2734 #define DECLARE_PRODUCT_FLAG(type, name, value, doc)      extern "C" type name;
2735 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc)          extern "C" type name;
2736 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc)   extern "C" type name;
2737 #define DECLARE_PD_DIAGNOSTIC_FLAG(type, name, doc)       extern "C" type name;
2738 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
2739 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc)   extern "C" type name;
2740 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc)   extern "C" type name;
2741 #ifdef PRODUCT
2742 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    const type name = value;
2743 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        const type name = pd_##name;
2744 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   const type name = value;
2745 #else
2746 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc)    extern "C" type name;
2747 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)        extern "C" type name;
2748 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)   extern "C" type name;
2749 #endif // PRODUCT
2750 // Special LP64 flags, product only needed for now.
2751 #ifdef _LP64
2752 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
2753 #else
2754 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
2755 #endif // _LP64
2756 
2757 // Implementation macros
2758 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc)      type name = value;
2759 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc)          type name = pd_##name;
2760 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc)   type name = value;
2761 #define MATERIALIZE_PD_DIAGNOSTIC_FLAG(type, name, doc)       type name = pd_##name;
2762 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
2763 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc)   type name = value;
2764 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc)   type name = value;
2765 #ifdef PRODUCT
2766 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)
2767 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)
2768 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
2769 #else
2770 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc)    type name = value;
2771 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)        type name = pd_##name;
2772 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)   type name = value;
2773 #endif // PRODUCT
2774 #ifdef _LP64
2775 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
2776 #else
2777 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
2778 #endif // _LP64
2779 
2780 // Only materialize src code for range checking when required, ignore otherwise
2781 #define IGNORE_RANGE(a, b)
2782 // Only materialize src code for contraint checking when required, ignore otherwise
2783 #define IGNORE_CONSTRAINT(func,type)
2784 
2785 #define IGNORE_WRITEABLE(type)
2786 
2787 VM_FLAGS(DECLARE_DEVELOPER_FLAG, \
2788          DECLARE_PD_DEVELOPER_FLAG, \
2789          DECLARE_PRODUCT_FLAG, \
2790          DECLARE_PD_PRODUCT_FLAG, \
2791          DECLARE_DIAGNOSTIC_FLAG, \
2792          DECLARE_PD_DIAGNOSTIC_FLAG, \
2793          DECLARE_EXPERIMENTAL_FLAG, \
2794          DECLARE_NOTPRODUCT_FLAG, \
2795          DECLARE_MANAGEABLE_FLAG, \
2796          DECLARE_PRODUCT_RW_FLAG, \
2797          DECLARE_LP64_PRODUCT_FLAG, \
2798          IGNORE_RANGE, \
2799          IGNORE_CONSTRAINT, \
2800          IGNORE_WRITEABLE)
2801 
2802 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \
2803                  DECLARE_PD_DEVELOPER_FLAG, \
2804                  DECLARE_PRODUCT_FLAG, \
2805                  DECLARE_PD_PRODUCT_FLAG, \
2806                  DECLARE_DIAGNOSTIC_FLAG, \
2807                  DECLARE_PD_DIAGNOSTIC_FLAG, \
2808                  DECLARE_NOTPRODUCT_FLAG, \
2809                  IGNORE_RANGE, \
2810                  IGNORE_CONSTRAINT, \
2811                  IGNORE_WRITEABLE)
2812 
2813 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \
2814            DECLARE_PRODUCT_FLAG, \
2815            DECLARE_DIAGNOSTIC_FLAG, \
2816            DECLARE_EXPERIMENTAL_FLAG, \
2817            DECLARE_NOTPRODUCT_FLAG, \
2818            IGNORE_RANGE, \
2819            IGNORE_CONSTRAINT, \
2820            IGNORE_WRITEABLE)
2821 
2822 // Extensions
2823 
2824 #include "runtime/globals_ext.hpp"
2825 
2826 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP
--- EOF ---