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src/hotspot/share/runtime/globals.hpp

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*** 25,62 **** #ifndef SHARE_RUNTIME_GLOBALS_HPP #define SHARE_RUNTIME_GLOBALS_HPP #include "compiler/compiler_globals.hpp" #include "gc/shared/gc_globals.hpp" #include "runtime/globals_shared.hpp" #include "utilities/align.hpp" #include "utilities/globalDefinitions.hpp" #include "utilities/macros.hpp" #include CPU_HEADER(globals) #include OS_HEADER(globals) #include OS_CPU_HEADER(globals) ! // develop flags are settable / visible only during development and are constant in the PRODUCT version ! // product flags are always settable / visible ! // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version ! ! // A flag must be declared with one of the following types: ! // bool, int, uint, intx, uintx, size_t, ccstr, ccstrlist, double, or uint64_t. ! // The type "ccstr" and "ccstrlist" are an alias for "const char*" and is used ! // only in this file, because the macrology requires single-token type names. ! ! // Note: Diagnostic options not meant for VM tuning or for product modes. // They are to be used for VM quality assurance or field diagnosis // of VM bugs. They are hidden so that users will not be encouraged to // try them as if they were VM ordinary execution options. However, they // are available in the product version of the VM. Under instruction // from support engineers, VM customers can turn them on to collect // diagnostic information about VM problems. To use a VM diagnostic // option, you must first specify +UnlockDiagnosticVMOptions. // (This master switch also affects the behavior of -Xprintflags.) // ! // experimental flags are in support of features that are not // part of the officially supported product, but are available // for experimenting with. They could, for example, be performance // features that may not have undergone full or rigorous QA, but which may // help performance in some cases and released for experimentation // by the community of users and developers. This flag also allows one to --- 25,129 ---- #ifndef SHARE_RUNTIME_GLOBALS_HPP #define SHARE_RUNTIME_GLOBALS_HPP #include "compiler/compiler_globals.hpp" #include "gc/shared/gc_globals.hpp" + #include "runtime/flags/jvmFlagConstraintsCompiler.hpp" + #include "runtime/flags/jvmFlagConstraintsRuntime.hpp" #include "runtime/globals_shared.hpp" #include "utilities/align.hpp" #include "utilities/globalDefinitions.hpp" #include "utilities/macros.hpp" #include CPU_HEADER(globals) #include OS_HEADER(globals) #include OS_CPU_HEADER(globals) ! // Command-line flag specification in HotSpot is divided into individual modules. ! // Each module should have 2 files in the module's directory. For example, C2 has the ! // following 2 files: ! // ! // c2_globals.hpp - specification of all flags for C2, including meta-information ! // such as docs, range and constraints. ! // c2_globals.cpp - definitions of the C++ variables that implements these flags. ! // ! // ! // In the xxx_globals.hpp file, each flag must be specified with one of the ! // following 5 macros. ! // ! // Platform-Independent Flags -- each flag has 5 arguments: (type, name, default_value, attr, docs) ! // ! // PRODUCT_FLAG -- always settable ! // DEVELOP_FLAG -- settable only during development and are constant in the PRODUCT version ! // NOTPROD_FLAG -- settable only during development and are *not* declared in the PRODUCT version ! // ! // Platform-Dependent Flags -- each flag has 4 arguments: (type, name, attr, docs) ! // ! // PRODUCT_FLAG_PD ! // DEVELOP_FLAG_PD ! // ! // type: A flag must be declared with one of the following types: ! // bool, int, uint, intx, uintx, size_t, ccstr, ccstr, double, or uint64_t. ! // ! // The type "ccstr" is an alias for "const char*" because the macrology ! // requires single-token type names. For this type, you can optionally ! // set the JVMFlag::STRINGLIST bit in the <attr> argument. This allows you ! // to specify the flag multiple times on the command-line to build ! // a string list. These flags are printed as "ccstrlist" by -XX:PrintFlagsFinal. ! // ! // name: The name of the flag. ! // ! // default_value: The default value of the flag. ! // Note that the default values for the _PD flags are declared in ! // platform-dependent header files such as cpu/x86/c2_globals_x86.hpp ! // ! // attr: See discussion below on flag attributes ! // ! // docs: Description of the flag. This is mostly for the benefits of HotSpot ! // developers, and is excluded from PRODUCT builds. ! // ! // ! // Optionally, a flag can be given a range and/or constraint by using the following ! // macros: ! // ! // FLAG_RANGE(name, min, max) ! // FLAG_CONSTRAINT(name, func, phase) ! // ! // When a range is specified, the flag's attr must include JVMFlag::RANGE. ! // When a constraint is specified, the flag's attr must include JVMFlag::CONSTRAINT. ! // ! // For example: ! // ! // PRODUCT_FLAG(size_t, LargePageSizeInBytes, 0, JVMFlag::RANGE, ! // "Large page size (0 to let VM choose the page size)"); ! // FLAG_RANGE( LargePageSizeInBytes, 0, max_uintx); ! // ! // PRODUCT_FLAG_PD(size_t,MetaspaceSize, JVMFlag::CONSTRAINT, ! // "Initial threshold (in bytes) at which a garbage collection " ! // "is done to reduce Metaspace usage"); ! // FLAG_CONSTRAINT( MetaspaceSize, (void*)MetaspaceSizeConstraintFunc, JVMFlag::AfterErgo); ! // ! // ! // Command-line Flag Attributes ! // ! // The <attr> argument for each flag may be any combination of the following ! // bits. ! // ! // JVMFlag::MANAGEABLE ! // JVMFlag::DIAGNOSTIC ! // JVMFlag::EXPERIMENTAL ! // ! // DIAGNOSTIC options are not meant for VM tuning or for product modes. // They are to be used for VM quality assurance or field diagnosis // of VM bugs. They are hidden so that users will not be encouraged to // try them as if they were VM ordinary execution options. However, they // are available in the product version of the VM. Under instruction // from support engineers, VM customers can turn them on to collect // diagnostic information about VM problems. To use a VM diagnostic // option, you must first specify +UnlockDiagnosticVMOptions. // (This master switch also affects the behavior of -Xprintflags.) // ! // EXPERIMENTAL flags are in support of features that are not // part of the officially supported product, but are available // for experimenting with. They could, for example, be performance // features that may not have undergone full or rigorous QA, but which may // help performance in some cases and released for experimentation // by the community of users and developers. This flag also allows one to
*** 68,78 **** // // Nota bene: neither diagnostic nor experimental options should be used casually, // and they are not supported on production loads, except under explicit // direction from support engineers. // ! // manageable flags are writeable external product flags. // They are dynamically writeable through the JDK management interface // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. // These flags are external exported interface (see CCC). The list of // manageable flags can be queried programmatically through the management // interface. --- 135,145 ---- // // Nota bene: neither diagnostic nor experimental options should be used casually, // and they are not supported on production loads, except under explicit // direction from support engineers. // ! // MANAGEABLE flags are writeable external product flags. // They are dynamically writeable through the JDK management interface // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. // These flags are external exported interface (see CCC). The list of // manageable flags can be queried programmatically through the management // interface.
*** 81,2532 **** // - the flag is defined in a CCC as an external exported interface. // - the VM implementation supports dynamic setting of the flag. // This implies that the VM must *always* query the flag variable // and not reuse state related to the flag state at any given time. // - you want the flag to be queried programmatically by the customers. // ! // product_rw flags are writeable internal product flags. ! // They are like "manageable" flags but for internal/private use. ! // The list of product_rw flags are internal/private flags which ! // may be changed/removed in a future release. It can be set ! // through the management interface to get/set value ! // when the name of flag is supplied. ! // ! // A flag can be made as "product_rw" only if ! // - the VM implementation supports dynamic setting of the flag. ! // This implies that the VM must *always* query the flag variable ! // and not reuse state related to the flag state at any given time. ! // ! // Note that when there is a need to support develop flags to be writeable, ! // it can be done in the same way as product_rw. // ! // range is a macro that will expand to min and max arguments for range ! // checking code if provided - see jvmFlagRangeList.hpp // ! // constraint is a macro that will expand to custom function call ! // for constraint checking if provided - see jvmFlagConstraintList.hpp // Default and minimum StringTable and SymbolTable size values // Must be powers of 2 const size_t defaultStringTableSize = NOT_LP64(1024) LP64_ONLY(65536); const size_t minimumStringTableSize = 128; const size_t defaultSymbolTableSize = 32768; // 2^15 const size_t minimumSymbolTableSize = 1024; ! #define RUNTIME_FLAGS(develop, \ ! develop_pd, \ ! product, \ ! product_pd, \ ! diagnostic, \ ! diagnostic_pd, \ ! experimental, \ ! notproduct, \ ! manageable, \ ! product_rw, \ ! lp64_product, \ ! range, \ ! constraint) \ ! \ ! lp64_product(bool, UseCompressedOops, false, \ ! "Use 32-bit object references in 64-bit VM. " \ ! "lp64_product means flag is always constant in 32 bit VM") \ ! \ ! lp64_product(bool, UseCompressedClassPointers, false, \ ! "Use 32-bit class pointers in 64-bit VM. " \ ! "lp64_product means flag is always constant in 32 bit VM") \ ! \ ! notproduct(bool, CheckCompressedOops, true, \ ! "Generate checks in encoding/decoding code in debug VM") \ ! \ ! product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ ! "Heap allocation steps through preferred address regions to find" \ ! " where it can allocate the heap. Number of steps to take per " \ ! "region.") \ ! range(1, max_uintx) \ ! \ ! lp64_product(intx, ObjectAlignmentInBytes, 8, \ ! "Default object alignment in bytes, 8 is minimum") \ ! range(8, 256) \ ! constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ ! \ ! develop(bool, CleanChunkPoolAsync, true, \ ! "Clean the chunk pool asynchronously") \ ! \ ! diagnostic(uint, HandshakeTimeout, 0, \ ! "If nonzero set a timeout in milliseconds for handshakes") \ ! \ ! experimental(bool, AlwaysSafeConstructors, false, \ ! "Force safe construction, as if all fields are final.") \ ! \ ! diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ ! "Enable normal processing of flags relating to field diagnostics")\ ! \ ! experimental(bool, UnlockExperimentalVMOptions, false, \ ! "Enable normal processing of flags relating to experimental " \ ! "features") \ ! \ ! product(bool, JavaMonitorsInStackTrace, true, \ ! "Print information about Java monitor locks when the stacks are" \ ! "dumped") \ ! \ ! product_pd(bool, UseLargePages, \ ! "Use large page memory") \ ! \ ! product_pd(bool, UseLargePagesIndividualAllocation, \ ! "Allocate large pages individually for better affinity") \ ! \ ! develop(bool, LargePagesIndividualAllocationInjectError, false, \ ! "Fail large pages individual allocation") \ ! \ ! product(bool, UseLargePagesInMetaspace, false, \ ! "Use large page memory in metaspace. " \ ! "Only used if UseLargePages is enabled.") \ ! \ ! product(bool, UseNUMA, false, \ ! "Use NUMA if available") \ ! \ ! product(bool, UseNUMAInterleaving, false, \ ! "Interleave memory across NUMA nodes if available") \ ! \ ! product(size_t, NUMAInterleaveGranularity, 2*M, \ ! "Granularity to use for NUMA interleaving on Windows OS") \ ! range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \ ! \ ! product(bool, ForceNUMA, false, \ ! "Force NUMA optimizations on single-node/UMA systems") \ ! \ ! product(uintx, NUMAChunkResizeWeight, 20, \ ! "Percentage (0-100) used to weight the current sample when " \ ! "computing exponentially decaying average for " \ ! "AdaptiveNUMAChunkSizing") \ ! range(0, 100) \ ! \ ! product(size_t, NUMASpaceResizeRate, 1*G, \ ! "Do not reallocate more than this amount per collection") \ ! range(0, max_uintx) \ ! \ ! product(bool, UseAdaptiveNUMAChunkSizing, true, \ ! "Enable adaptive chunk sizing for NUMA") \ ! \ ! product(bool, NUMAStats, false, \ ! "Print NUMA stats in detailed heap information") \ ! \ ! product(uintx, NUMAPageScanRate, 256, \ ! "Maximum number of pages to include in the page scan procedure") \ ! range(0, max_uintx) \ ! \ ! product(bool, UseAES, false, \ ! "Control whether AES instructions are used when available") \ ! \ ! product(bool, UseFMA, false, \ ! "Control whether FMA instructions are used when available") \ ! \ ! product(bool, UseSHA, false, \ ! "Control whether SHA instructions are used when available") \ ! \ ! diagnostic(bool, UseGHASHIntrinsics, false, \ ! "Use intrinsics for GHASH versions of crypto") \ ! \ ! product(bool, UseBASE64Intrinsics, false, \ ! "Use intrinsics for java.util.Base64") \ ! \ ! product(size_t, LargePageSizeInBytes, 0, \ ! "Large page size (0 to let VM choose the page size)") \ ! range(0, max_uintx) \ ! \ ! product(size_t, LargePageHeapSizeThreshold, 128*M, \ ! "Use large pages if maximum heap is at least this big") \ ! range(0, max_uintx) \ ! \ ! product(bool, ForceTimeHighResolution, false, \ ! "Using high time resolution (for Win32 only)") \ ! \ ! develop(bool, TracePcPatching, false, \ ! "Trace usage of frame::patch_pc") \ ! \ ! develop(bool, TraceRelocator, false, \ ! "Trace the bytecode relocator") \ ! \ ! develop(bool, TraceLongCompiles, false, \ ! "Print out every time compilation is longer than " \ ! "a given threshold") \ ! \ ! diagnostic(bool, SafepointALot, false, \ ! "Generate a lot of safepoints. This works with " \ ! "GuaranteedSafepointInterval") \ ! \ ! diagnostic(bool, HandshakeALot, false, \ ! "Generate a lot of handshakes. This works with " \ ! "GuaranteedSafepointInterval") \ ! \ ! product_pd(bool, BackgroundCompilation, \ ! "A thread requesting compilation is not blocked during " \ ! "compilation") \ ! \ ! product(bool, PrintVMQWaitTime, false, \ ! "(Deprecated) Print out the waiting time in VM operation queue") \ ! \ ! product(bool, MethodFlushing, true, \ ! "Reclamation of zombie and not-entrant methods") \ ! \ ! develop(bool, VerifyStack, false, \ ! "Verify stack of each thread when it is entering a runtime call") \ ! \ ! diagnostic(bool, ForceUnreachable, false, \ ! "Make all non code cache addresses to be unreachable by " \ ! "forcing use of 64bit literal fixups") \ ! \ ! notproduct(bool, StressDerivedPointers, false, \ ! "Force scavenge when a derived pointer is detected on stack " \ ! "after rtm call") \ ! \ ! develop(bool, TraceDerivedPointers, false, \ ! "Trace traversal of derived pointers on stack") \ ! \ ! notproduct(bool, TraceCodeBlobStacks, false, \ ! "Trace stack-walk of codeblobs") \ ! \ ! notproduct(bool, PrintRewrites, false, \ ! "Print methods that are being rewritten") \ ! \ ! product(bool, UseInlineCaches, true, \ ! "Use Inline Caches for virtual calls ") \ ! \ ! diagnostic(bool, InlineArrayCopy, true, \ ! "Inline arraycopy native that is known to be part of " \ ! "base library DLL") \ ! \ ! diagnostic(bool, InlineObjectHash, true, \ ! "Inline Object::hashCode() native that is known to be part " \ ! "of base library DLL") \ ! \ ! diagnostic(bool, InlineNatives, true, \ ! "Inline natives that are known to be part of base library DLL") \ ! \ ! diagnostic(bool, InlineMathNatives, true, \ ! "Inline SinD, CosD, etc.") \ ! \ ! diagnostic(bool, InlineClassNatives, true, \ ! "Inline Class.isInstance, etc") \ ! \ ! diagnostic(bool, InlineThreadNatives, true, \ ! "Inline Thread.currentThread, etc") \ ! \ ! diagnostic(bool, InlineUnsafeOps, true, \ ! "Inline memory ops (native methods) from Unsafe") \ ! \ ! product(bool, CriticalJNINatives, true, \ ! "Check for critical JNI entry points") \ ! \ ! notproduct(bool, StressCriticalJNINatives, false, \ ! "Exercise register saving code in critical natives") \ ! \ ! diagnostic(bool, UseAESIntrinsics, false, \ ! "Use intrinsics for AES versions of crypto") \ ! \ ! diagnostic(bool, UseAESCTRIntrinsics, false, \ ! "Use intrinsics for the paralleled version of AES/CTR crypto") \ ! \ ! diagnostic(bool, UseSHA1Intrinsics, false, \ ! "Use intrinsics for SHA-1 crypto hash function. " \ ! "Requires that UseSHA is enabled.") \ ! \ ! diagnostic(bool, UseSHA256Intrinsics, false, \ ! "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ ! "Requires that UseSHA is enabled.") \ ! \ ! diagnostic(bool, UseSHA512Intrinsics, false, \ ! "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ ! "Requires that UseSHA is enabled.") \ ! \ ! diagnostic(bool, UseCRC32Intrinsics, false, \ ! "use intrinsics for java.util.zip.CRC32") \ ! \ ! diagnostic(bool, UseCRC32CIntrinsics, false, \ ! "use intrinsics for java.util.zip.CRC32C") \ ! \ ! diagnostic(bool, UseAdler32Intrinsics, false, \ ! "use intrinsics for java.util.zip.Adler32") \ ! \ ! diagnostic(bool, UseVectorizedMismatchIntrinsic, false, \ ! "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ ! \ ! diagnostic(ccstrlist, DisableIntrinsic, "", \ ! "do not expand intrinsics whose (internal) names appear here") \ ! \ ! develop(bool, TraceCallFixup, false, \ ! "Trace all call fixups") \ ! \ ! develop(bool, DeoptimizeALot, false, \ ! "Deoptimize at every exit from the runtime system") \ ! \ ! notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ ! "A comma separated list of bcis to deoptimize at") \ ! \ ! develop(bool, DeoptimizeRandom, false, \ ! "Deoptimize random frames on random exit from the runtime system")\ ! \ ! notproduct(bool, ZombieALot, false, \ ! "Create zombies (non-entrant) at exit from the runtime system") \ ! \ ! notproduct(bool, WalkStackALot, false, \ ! "Trace stack (no print) at every exit from the runtime system") \ ! \ ! product(bool, Debugging, false, \ ! "Set when executing debug methods in debug.cpp " \ ! "(to prevent triggering assertions)") \ ! \ ! notproduct(bool, VerifyLastFrame, false, \ ! "Verify oops on last frame on entry to VM") \ ! \ ! product(bool, SafepointTimeout, false, \ ! "Time out and warn or fail after SafepointTimeoutDelay " \ ! "milliseconds if failed to reach safepoint") \ ! \ ! diagnostic(bool, AbortVMOnSafepointTimeout, false, \ ! "Abort upon failure to reach safepoint (see SafepointTimeout)") \ ! \ ! diagnostic(bool, AbortVMOnVMOperationTimeout, false, \ ! "Abort upon failure to complete VM operation promptly") \ ! \ ! diagnostic(intx, AbortVMOnVMOperationTimeoutDelay, 1000, \ ! "Delay in milliseconds for option AbortVMOnVMOperationTimeout") \ ! range(0, max_intx) \ ! \ ! /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ ! /* typically, at most a few retries are needed */ \ ! product(intx, SuspendRetryCount, 50, \ ! "Maximum retry count for an external suspend request") \ ! range(0, max_intx) \ ! \ ! product(intx, SuspendRetryDelay, 5, \ ! "Milliseconds to delay per retry (* current_retry_count)") \ ! range(0, max_intx) \ ! \ ! product(bool, AssertOnSuspendWaitFailure, false, \ ! "Assert/Guarantee on external suspend wait failure") \ ! \ ! product(bool, TraceSuspendWaitFailures, false, \ ! "Trace external suspend wait failures") \ ! \ ! product(bool, MaxFDLimit, true, \ ! "Bump the number of file descriptors to maximum in Solaris") \ ! \ ! diagnostic(bool, LogEvents, true, \ ! "Enable the various ring buffer event logs") \ ! \ ! diagnostic(uintx, LogEventsBufferEntries, 20, \ ! "Number of ring buffer event logs") \ ! range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ ! \ ! diagnostic(bool, BytecodeVerificationRemote, true, \ ! "Enable the Java bytecode verifier for remote classes") \ ! \ ! diagnostic(bool, BytecodeVerificationLocal, false, \ ! "Enable the Java bytecode verifier for local classes") \ ! \ ! develop(bool, ForceFloatExceptions, trueInDebug, \ ! "Force exceptions on FP stack under/overflow") \ ! \ ! develop(bool, VerifyStackAtCalls, false, \ ! "Verify that the stack pointer is unchanged after calls") \ ! \ ! develop(bool, TraceJavaAssertions, false, \ ! "Trace java language assertions") \ ! \ ! notproduct(bool, VerifyCodeCache, false, \ ! "Verify code cache on memory allocation/deallocation") \ ! \ ! develop(bool, UseMallocOnly, false, \ ! "Use only malloc/free for allocation (no resource area/arena)") \ ! \ ! develop(bool, ZapResourceArea, trueInDebug, \ ! "Zap freed resource/arena space with 0xABABABAB") \ ! \ ! notproduct(bool, ZapVMHandleArea, trueInDebug, \ ! "Zap freed VM handle space with 0xBCBCBCBC") \ ! \ ! notproduct(bool, ZapStackSegments, trueInDebug, \ ! "Zap allocated/freed stack segments with 0xFADFADED") \ ! \ ! develop(bool, ZapUnusedHeapArea, trueInDebug, \ ! "Zap unused heap space with 0xBAADBABE") \ ! \ ! develop(bool, CheckZapUnusedHeapArea, false, \ ! "Check zapping of unused heap space") \ ! \ ! develop(bool, ZapFillerObjects, trueInDebug, \ ! "Zap filler objects with 0xDEAFBABE") \ ! \ ! develop(bool, PrintVMMessages, true, \ ! "Print VM messages on console") \ ! \ ! notproduct(uintx, ErrorHandlerTest, 0, \ ! "If > 0, provokes an error after VM initialization; the value " \ ! "determines which error to provoke. See test_error_handler() " \ ! "in vmError.cpp.") \ ! \ ! notproduct(uintx, TestCrashInErrorHandler, 0, \ ! "If > 0, provokes an error inside VM error handler (a secondary " \ ! "crash). see test_error_handler() in vmError.cpp") \ ! \ ! notproduct(bool, TestSafeFetchInErrorHandler, false, \ ! "If true, tests SafeFetch inside error handler.") \ ! \ ! notproduct(bool, TestUnresponsiveErrorHandler, false, \ ! "If true, simulates an unresponsive error handler.") \ ! \ ! develop(bool, Verbose, false, \ ! "Print additional debugging information from other modes") \ ! \ ! develop(bool, PrintMiscellaneous, false, \ ! "Print uncategorized debugging information (requires +Verbose)") \ ! \ ! develop(bool, WizardMode, false, \ ! "Print much more debugging information") \ ! \ ! product(bool, ShowMessageBoxOnError, false, \ ! "Keep process alive on VM fatal error") \ ! \ ! product(bool, CreateCoredumpOnCrash, true, \ ! "Create core/mini dump on VM fatal error") \ ! \ ! product(uint64_t, ErrorLogTimeout, 2 * 60, \ ! "Timeout, in seconds, to limit the time spent on writing an " \ ! "error log in case of a crash.") \ ! range(0, (uint64_t)max_jlong/1000) \ ! \ ! product_pd(bool, UseOSErrorReporting, \ ! "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ ! \ ! product(bool, SuppressFatalErrorMessage, false, \ ! "Report NO fatal error message (avoid deadlock)") \ ! \ ! product(ccstrlist, OnError, "", \ ! "Run user-defined commands on fatal error; see VMError.cpp " \ ! "for examples") \ ! \ ! product(ccstrlist, OnOutOfMemoryError, "", \ ! "Run user-defined commands on first java.lang.OutOfMemoryError") \ ! \ ! manageable(bool, HeapDumpBeforeFullGC, false, \ ! "Dump heap to file before any major stop-the-world GC") \ ! \ ! manageable(bool, HeapDumpAfterFullGC, false, \ ! "Dump heap to file after any major stop-the-world GC") \ ! \ ! manageable(bool, HeapDumpOnOutOfMemoryError, false, \ ! "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ ! \ ! manageable(ccstr, HeapDumpPath, NULL, \ ! "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ ! "directory) of the dump file (defaults to java_pid<pid>.hprof " \ ! "in the working directory)") \ ! \ ! develop(bool, BreakAtWarning, false, \ ! "Execute breakpoint upon encountering VM warning") \ ! \ ! product(ccstr, NativeMemoryTracking, "off", \ ! "Native memory tracking options") \ ! \ ! diagnostic(bool, PrintNMTStatistics, false, \ ! "Print native memory tracking summary data if it is on") \ ! \ ! diagnostic(bool, LogCompilation, false, \ ! "Log compilation activity in detail to LogFile") \ ! \ ! product(bool, PrintCompilation, false, \ ! "Print compilations") \ ! \ ! product(bool, PrintExtendedThreadInfo, false, \ ! "Print more information in thread dump") \ ! \ ! diagnostic(intx, ScavengeRootsInCode, 2, \ ! "0: do not allow scavengable oops in the code cache; " \ ! "1: allow scavenging from the code cache; " \ ! "2: emit as many constants as the compiler can see") \ ! range(0, 2) \ ! \ ! product(bool, AlwaysRestoreFPU, false, \ ! "Restore the FPU control word after every JNI call (expensive)") \ ! \ ! diagnostic(bool, PrintCompilation2, false, \ ! "Print additional statistics per compilation") \ ! \ ! diagnostic(bool, PrintAdapterHandlers, false, \ ! "Print code generated for i2c/c2i adapters") \ ! \ ! diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ ! "Verify that i2c/c2i adapters are called properly") \ ! \ ! develop(bool, VerifyAdapterSharing, false, \ ! "Verify that the code for shared adapters is the equivalent") \ ! \ ! diagnostic(bool, PrintAssembly, false, \ ! "Print assembly code (using external disassembler.so)") \ ! \ ! diagnostic(ccstr, PrintAssemblyOptions, NULL, \ ! "Print options string passed to disassembler.so") \ ! \ ! notproduct(bool, PrintNMethodStatistics, false, \ ! "Print a summary statistic for the generated nmethods") \ ! \ ! diagnostic(bool, PrintNMethods, false, \ ! "Print assembly code for nmethods when generated") \ ! \ ! diagnostic(bool, PrintNativeNMethods, false, \ ! "Print assembly code for native nmethods when generated") \ ! \ ! develop(bool, PrintDebugInfo, false, \ ! "Print debug information for all nmethods when generated") \ ! \ ! develop(bool, PrintRelocations, false, \ ! "Print relocation information for all nmethods when generated") \ ! \ ! develop(bool, PrintDependencies, false, \ ! "Print dependency information for all nmethods when generated") \ ! \ ! develop(bool, PrintExceptionHandlers, false, \ ! "Print exception handler tables for all nmethods when generated") \ ! \ ! develop(bool, StressCompiledExceptionHandlers, false, \ ! "Exercise compiled exception handlers") \ ! \ ! develop(bool, InterceptOSException, false, \ ! "Start debugger when an implicit OS (e.g. NULL) " \ ! "exception happens") \ ! \ ! product(bool, PrintCodeCache, false, \ ! "Print the code cache memory usage when exiting") \ ! \ ! develop(bool, PrintCodeCache2, false, \ ! "Print detailed usage information on the code cache when exiting")\ ! \ ! product(bool, PrintCodeCacheOnCompilation, false, \ ! "Print the code cache memory usage each time a method is " \ ! "compiled") \ ! \ ! diagnostic(bool, PrintCodeHeapAnalytics, false, \ ! "Print code heap usage statistics on exit and on full condition") \ ! \ ! diagnostic(bool, PrintStubCode, false, \ ! "Print generated stub code") \ ! \ ! product(bool, StackTraceInThrowable, true, \ ! "Collect backtrace in throwable when exception happens") \ ! \ ! product(bool, OmitStackTraceInFastThrow, true, \ ! "Omit backtraces for some 'hot' exceptions in optimized code") \ ! \ ! manageable(bool, ShowCodeDetailsInExceptionMessages, false, \ ! "Show exception messages from RuntimeExceptions that contain " \ ! "snippets of the failing code. Disable this to improve privacy.") \ ! \ ! product(bool, PrintWarnings, true, \ ! "Print JVM warnings to output stream") \ ! \ ! notproduct(uintx, WarnOnStalledSpinLock, 0, \ ! "Print warnings for stalled SpinLocks") \ ! \ ! product(bool, RegisterFinalizersAtInit, true, \ ! "Register finalizable objects at end of Object.<init> or " \ ! "after allocation") \ ! \ ! develop(bool, RegisterReferences, true, \ ! "Tell whether the VM should register soft/weak/final/phantom " \ ! "references") \ ! \ ! develop(bool, IgnoreRewrites, false, \ ! "Suppress rewrites of bytecodes in the oopmap generator. " \ ! "This is unsafe!") \ ! \ ! develop(bool, PrintCodeCacheExtension, false, \ ! "Print extension of code cache") \ ! \ ! develop(bool, UsePrivilegedStack, true, \ ! "Enable the security JVM functions") \ ! \ ! develop(bool, ProtectionDomainVerification, true, \ ! "Verify protection domain before resolution in system dictionary")\ ! \ ! product(bool, ClassUnloading, true, \ ! "Do unloading of classes") \ ! \ ! product(bool, ClassUnloadingWithConcurrentMark, true, \ ! "Do unloading of classes with a concurrent marking cycle") \ ! \ ! develop(bool, DisableStartThread, false, \ ! "Disable starting of additional Java threads " \ ! "(for debugging only)") \ ! \ ! develop(bool, MemProfiling, false, \ ! "Write memory usage profiling to log file") \ ! \ ! notproduct(bool, PrintSystemDictionaryAtExit, false, \ ! "Print the system dictionary at exit") \ ! \ ! diagnostic(bool, DynamicallyResizeSystemDictionaries, true, \ ! "Dynamically resize system dictionaries as needed") \ ! \ ! product(bool, AlwaysLockClassLoader, false, \ ! "Require the VM to acquire the class loader lock before calling " \ ! "loadClass() even for class loaders registering " \ ! "as parallel capable") \ ! \ ! product(bool, AllowParallelDefineClass, false, \ ! "Allow parallel defineClass requests for class loaders " \ ! "registering as parallel capable") \ ! \ ! product_pd(bool, DontYieldALot, \ ! "Throw away obvious excess yield calls") \ ! \ ! develop(bool, UseDetachedThreads, true, \ ! "Use detached threads that are recycled upon termination " \ ! "(for Solaris only)") \ ! \ ! experimental(bool, DisablePrimordialThreadGuardPages, false, \ ! "Disable the use of stack guard pages if the JVM is loaded " \ ! "on the primordial process thread") \ ! \ ! product(bool, UseLWPSynchronization, true, \ ! "Use LWP-based instead of libthread-based synchronization " \ ! "(SPARC only)") \ ! \ ! product(intx, MonitorBound, 0, "(Deprecated) Bound Monitor population") \ ! range(0, max_jint) \ ! \ ! experimental(intx, MonitorUsedDeflationThreshold, 90, \ ! "Percentage of used monitors before triggering cleanup " \ ! "safepoint which deflates monitors (0 is off). " \ ! "The check is performed on GuaranteedSafepointInterval.") \ ! range(0, 100) \ ! \ ! experimental(intx, hashCode, 5, \ ! "(Unstable) select hashCode generation algorithm") \ ! \ ! product(bool, FilterSpuriousWakeups, true, \ ! "When true prevents OS-level spurious, or premature, wakeups " \ ! "from Object.wait (Ignored for Windows)") \ ! \ ! develop(bool, UsePthreads, false, \ ! "Use pthread-based instead of libthread-based synchronization " \ ! "(SPARC only)") \ ! \ ! product(bool, ReduceSignalUsage, false, \ ! "Reduce the use of OS signals in Java and/or the VM") \ ! \ ! develop(bool, LoadLineNumberTables, true, \ ! "Tell whether the class file parser loads line number tables") \ ! \ ! develop(bool, LoadLocalVariableTables, true, \ ! "Tell whether the class file parser loads local variable tables") \ ! \ ! develop(bool, LoadLocalVariableTypeTables, true, \ ! "Tell whether the class file parser loads local variable type" \ ! "tables") \ ! \ ! product(bool, AllowUserSignalHandlers, false, \ ! "Do not complain if the application installs signal handlers " \ ! "(Solaris & Linux only)") \ ! \ ! product(bool, UseSignalChaining, true, \ ! "Use signal-chaining to invoke signal handlers installed " \ ! "by the application (Solaris & Linux only)") \ ! \ ! product(bool, RestoreMXCSROnJNICalls, false, \ ! "Restore MXCSR when returning from JNI calls") \ ! \ ! product(bool, CheckJNICalls, false, \ ! "Verify all arguments to JNI calls") \ ! \ ! product(bool, UseFastJNIAccessors, true, \ ! "Use optimized versions of Get<Primitive>Field") \ ! \ ! product(intx, MaxJNILocalCapacity, 65536, \ ! "Maximum allowable local JNI handle capacity to " \ ! "EnsureLocalCapacity() and PushLocalFrame(), " \ ! "where <= 0 is unlimited, default: 65536") \ ! range(min_intx, max_intx) \ ! \ ! product(bool, EagerXrunInit, false, \ ! "Eagerly initialize -Xrun libraries; allows startup profiling, " \ ! "but not all -Xrun libraries may support the state of the VM " \ ! "at this time") \ ! \ ! product(bool, PreserveAllAnnotations, false, \ ! "Preserve RuntimeInvisibleAnnotations as well " \ ! "as RuntimeVisibleAnnotations") \ ! \ ! develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ ! "Number of OutOfMemoryErrors preallocated with backtrace") \ ! \ ! product(bool, UseXMMForArrayCopy, false, \ ! "Use SSE2 MOVQ instruction for Arraycopy") \ ! \ ! notproduct(bool, PrintFieldLayout, false, \ ! "Print field layout for each class") \ ! \ ! /* Need to limit the extent of the padding to reasonable size. */\ ! /* 8K is well beyond the reasonable HW cache line size, even with */\ ! /* aggressive prefetching, while still leaving the room for segregating */\ ! /* among the distinct pages. */\ ! product(intx, ContendedPaddingWidth, 128, \ ! "How many bytes to pad the fields/classes marked @Contended with")\ ! range(0, 8192) \ ! constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ ! \ ! product(bool, EnableContended, true, \ ! "Enable @Contended annotation support") \ ! \ ! product(bool, RestrictContended, true, \ ! "Restrict @Contended to trusted classes") \ ! \ ! product(bool, UseBiasedLocking, true, \ ! "Enable biased locking in JVM") \ ! \ ! product(intx, BiasedLockingStartupDelay, 0, \ ! "Number of milliseconds to wait before enabling biased locking") \ ! range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ ! constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ ! \ ! diagnostic(bool, PrintBiasedLockingStatistics, false, \ ! "Print statistics of biased locking in JVM") \ ! \ ! product(intx, BiasedLockingBulkRebiasThreshold, 20, \ ! "Threshold of number of revocations per type to try to " \ ! "rebias all objects in the heap of that type") \ ! range(0, max_intx) \ ! constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ ! \ ! product(intx, BiasedLockingBulkRevokeThreshold, 40, \ ! "Threshold of number of revocations per type to permanently " \ ! "revoke biases of all objects in the heap of that type") \ ! range(0, max_intx) \ ! constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ ! \ ! product(intx, BiasedLockingDecayTime, 25000, \ ! "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ ! "type after previous bulk rebias") \ ! range(500, max_intx) \ ! constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ ! \ ! product(bool, ExitOnOutOfMemoryError, false, \ ! "JVM exits on the first occurrence of an out-of-memory error") \ ! \ ! product(bool, CrashOnOutOfMemoryError, false, \ ! "JVM aborts, producing an error log and core/mini dump, on the " \ ! "first occurrence of an out-of-memory error") \ ! \ ! /* tracing */ \ ! \ ! develop(bool, StressRewriter, false, \ ! "Stress linktime bytecode rewriting") \ ! \ ! product(ccstr, TraceJVMTI, NULL, \ ! "Trace flags for JVMTI functions and events") \ ! \ ! /* This option can change an EMCP method into an obsolete method. */ \ ! /* This can affect tests that except specific methods to be EMCP. */ \ ! /* This option should be used with caution. */ \ ! product(bool, StressLdcRewrite, false, \ ! "Force ldc -> ldc_w rewrite during RedefineClasses") \ ! \ ! /* change to false by default sometime after Mustang */ \ ! product(bool, VerifyMergedCPBytecodes, true, \ ! "Verify bytecodes after RedefineClasses constant pool merging") \ ! \ ! product(bool, AllowRedefinitionToAddDeleteMethods, false, \ ! "(Deprecated) Allow redefinition to add and delete private " \ ! "static or final methods for compatibility with old releases") \ ! \ ! develop(bool, TraceBytecodes, false, \ ! "Trace bytecode execution") \ ! \ ! develop(bool, TraceICs, false, \ ! "Trace inline cache changes") \ ! \ ! notproduct(bool, TraceInvocationCounterOverflow, false, \ ! "Trace method invocation counter overflow") \ ! \ ! develop(bool, TraceInlineCacheClearing, false, \ ! "Trace clearing of inline caches in nmethods") \ ! \ ! develop(bool, TraceDependencies, false, \ ! "Trace dependencies") \ ! \ ! develop(bool, VerifyDependencies, trueInDebug, \ ! "Exercise and verify the compilation dependency mechanism") \ ! \ ! develop(bool, TraceNewOopMapGeneration, false, \ ! "Trace OopMapGeneration") \ ! \ ! develop(bool, TraceNewOopMapGenerationDetailed, false, \ ! "Trace OopMapGeneration: print detailed cell states") \ ! \ ! develop(bool, TimeOopMap, false, \ ! "Time calls to GenerateOopMap::compute_map() in sum") \ ! \ ! develop(bool, TimeOopMap2, false, \ ! "Time calls to GenerateOopMap::compute_map() individually") \ ! \ ! develop(bool, TraceOopMapRewrites, false, \ ! "Trace rewriting of method oops during oop map generation") \ ! \ ! develop(bool, TraceICBuffer, false, \ ! "Trace usage of IC buffer") \ ! \ ! develop(bool, TraceCompiledIC, false, \ ! "Trace changes of compiled IC") \ ! \ ! develop(bool, FLSVerifyDictionary, false, \ ! "Do lots of (expensive) FLS dictionary verification") \ ! \ ! \ ! notproduct(bool, CheckMemoryInitialization, false, \ ! "Check memory initialization") \ ! \ ! product(uintx, ProcessDistributionStride, 4, \ ! "Stride through processors when distributing processes") \ ! range(0, max_juint) \ ! \ ! develop(bool, TraceFinalizerRegistration, false, \ ! "Trace registration of final references") \ ! \ ! product(bool, IgnoreEmptyClassPaths, false, \ ! "Ignore empty path elements in -classpath") \ ! \ ! product(size_t, InitialBootClassLoaderMetaspaceSize, \ ! NOT_LP64(2200*K) LP64_ONLY(4*M), \ ! "Initial size of the boot class loader data metaspace") \ ! range(30*K, max_uintx/BytesPerWord) \ ! constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ ! \ ! product(bool, PrintHeapAtSIGBREAK, true, \ ! "Print heap layout in response to SIGBREAK") \ ! \ ! manageable(bool, PrintClassHistogram, false, \ ! "Print a histogram of class instances") \ ! \ ! experimental(double, ObjectCountCutOffPercent, 0.5, \ ! "The percentage of the used heap that the instances of a class " \ ! "must occupy for the class to generate a trace event") \ ! range(0.0, 100.0) \ ! \ ! /* JVMTI heap profiling */ \ ! \ ! diagnostic(bool, TraceJVMTIObjectTagging, false, \ ! "Trace JVMTI object tagging calls") \ ! \ ! diagnostic(bool, VerifyBeforeIteration, false, \ ! "Verify memory system before JVMTI iteration") \ ! \ ! /* compiler interface */ \ ! \ ! develop(bool, CIPrintCompilerName, false, \ ! "when CIPrint is active, print the name of the active compiler") \ ! \ ! diagnostic(bool, CIPrintCompileQueue, false, \ ! "display the contents of the compile queue whenever a " \ ! "compilation is enqueued") \ ! \ ! develop(bool, CIPrintRequests, false, \ ! "display every request for compilation") \ ! \ ! product(bool, CITime, false, \ ! "collect timing information for compilation") \ ! \ ! develop(bool, CITimeVerbose, false, \ ! "be more verbose in compilation timings") \ ! \ ! develop(bool, CITimeEach, false, \ ! "display timing information after each successful compilation") \ ! \ ! develop(bool, CICountOSR, false, \ ! "use a separate counter when assigning ids to osr compilations") \ ! \ ! develop(bool, CICompileNatives, true, \ ! "compile native methods if supported by the compiler") \ ! \ ! develop_pd(bool, CICompileOSR, \ ! "compile on stack replacement methods if supported by the " \ ! "compiler") \ ! \ ! develop(bool, CIPrintMethodCodes, false, \ ! "print method bytecodes of the compiled code") \ ! \ ! develop(bool, CIPrintTypeFlow, false, \ ! "print the results of ciTypeFlow analysis") \ ! \ ! develop(bool, CITraceTypeFlow, false, \ ! "detailed per-bytecode tracing of ciTypeFlow analysis") \ ! \ ! develop(intx, OSROnlyBCI, -1, \ ! "OSR only at this bci. Negative values mean exclude that bci") \ ! \ ! /* compiler */ \ ! \ ! /* notice: the max range value here is max_jint, not max_intx */ \ ! /* because of overflow issue */ \ ! product(intx, CICompilerCount, CI_COMPILER_COUNT, \ ! "Number of compiler threads to run") \ ! range(0, max_jint) \ ! constraint(CICompilerCountConstraintFunc, AfterErgo) \ ! \ ! product(bool, UseDynamicNumberOfCompilerThreads, true, \ ! "Dynamically choose the number of parallel compiler threads") \ ! \ ! diagnostic(bool, ReduceNumberOfCompilerThreads, true, \ ! "Reduce the number of parallel compiler threads when they " \ ! "are not used") \ ! \ ! diagnostic(bool, TraceCompilerThreads, false, \ ! "Trace creation and removal of compiler threads") \ ! \ ! develop(bool, InjectCompilerCreationFailure, false, \ ! "Inject thread creation failures for " \ ! "UseDynamicNumberOfCompilerThreads") \ ! \ ! develop(bool, UseStackBanging, true, \ ! "use stack banging for stack overflow checks (required for " \ ! "proper StackOverflow handling; disable only to measure cost " \ ! "of stackbanging)") \ ! \ ! develop(bool, GenerateSynchronizationCode, true, \ ! "generate locking/unlocking code for synchronized methods and " \ ! "monitors") \ ! \ ! develop(bool, GenerateRangeChecks, true, \ ! "Generate range checks for array accesses") \ ! \ ! diagnostic_pd(bool, ImplicitNullChecks, \ ! "Generate code for implicit null checks") \ ! \ ! product_pd(bool, TrapBasedNullChecks, \ ! "Generate code for null checks that uses a cmp and trap " \ ! "instruction raising SIGTRAP. This is only used if an access to" \ ! "null (+offset) will not raise a SIGSEGV, i.e.," \ ! "ImplicitNullChecks don't work (PPC64).") \ ! \ ! diagnostic(bool, EnableThreadSMRExtraValidityChecks, true, \ ! "Enable Thread SMR extra validity checks") \ ! \ ! diagnostic(bool, EnableThreadSMRStatistics, trueInDebug, \ ! "Enable Thread SMR Statistics") \ ! \ ! product(bool, UseNotificationThread, true, \ ! "Use Notification Thread") \ ! \ ! product(bool, Inline, true, \ ! "Enable inlining") \ ! \ ! product(bool, ClipInlining, true, \ ! "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ ! \ ! develop(bool, UseCHA, true, \ ! "Enable CHA") \ ! \ ! product(bool, UseTypeProfile, true, \ ! "Check interpreter profile for historically monomorphic calls") \ ! \ ! diagnostic(bool, PrintInlining, false, \ ! "Print inlining optimizations") \ ! \ ! product(bool, UsePopCountInstruction, false, \ ! "Use population count instruction") \ ! \ ! develop(bool, EagerInitialization, false, \ ! "Eagerly initialize classes if possible") \ ! \ ! diagnostic(bool, LogTouchedMethods, false, \ ! "Log methods which have been ever touched in runtime") \ ! \ ! diagnostic(bool, PrintTouchedMethodsAtExit, false, \ ! "Print all methods that have been ever touched in runtime") \ ! \ ! develop(bool, TraceMethodReplacement, false, \ ! "Print when methods are replaced do to recompilation") \ ! \ ! develop(bool, PrintMethodFlushing, false, \ ! "Print the nmethods being flushed") \ ! \ ! diagnostic(bool, PrintMethodFlushingStatistics, false, \ ! "print statistics about method flushing") \ ! \ ! diagnostic(intx, HotMethodDetectionLimit, 100000, \ ! "Number of compiled code invocations after which " \ ! "the method is considered as hot by the flusher") \ ! range(1, max_jint) \ ! \ ! diagnostic(intx, MinPassesBeforeFlush, 10, \ ! "Minimum number of sweeper passes before an nmethod " \ ! "can be flushed") \ ! range(0, max_intx) \ ! \ ! product(bool, UseCodeAging, true, \ ! "Insert counter to detect warm methods") \ ! \ ! diagnostic(bool, StressCodeAging, false, \ ! "Start with counters compiled in") \ ! \ ! develop(bool, StressCodeBuffers, false, \ ! "Exercise code buffer expansion and other rare state changes") \ ! \ ! diagnostic(bool, DebugNonSafepoints, trueInDebug, \ ! "Generate extra debugging information for non-safepoints in " \ ! "nmethods") \ ! \ ! product(bool, PrintVMOptions, false, \ ! "Print flags that appeared on the command line") \ ! \ ! product(bool, IgnoreUnrecognizedVMOptions, false, \ ! "Ignore unrecognized VM options") \ ! \ ! product(bool, PrintCommandLineFlags, false, \ ! "Print flags specified on command line or set by ergonomics") \ ! \ ! product(bool, PrintFlagsInitial, false, \ ! "Print all VM flags before argument processing and exit VM") \ ! \ ! product(bool, PrintFlagsFinal, false, \ ! "Print all VM flags after argument and ergonomic processing") \ ! \ ! notproduct(bool, PrintFlagsWithComments, false, \ ! "Print all VM flags with default values and descriptions and " \ ! "exit") \ ! \ ! product(bool, PrintFlagsRanges, false, \ ! "Print VM flags and their ranges") \ ! \ ! diagnostic(bool, SerializeVMOutput, true, \ ! "Use a mutex to serialize output to tty and LogFile") \ ! \ ! diagnostic(bool, DisplayVMOutput, true, \ ! "Display all VM output on the tty, independently of LogVMOutput") \ ! \ ! diagnostic(bool, LogVMOutput, false, \ ! "Save VM output to LogFile") \ ! \ ! diagnostic(ccstr, LogFile, NULL, \ ! "If LogVMOutput or LogCompilation is on, save VM output to " \ ! "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ ! \ ! product(ccstr, ErrorFile, NULL, \ ! "If an error occurs, save the error data to this file " \ ! "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ ! \ ! product(bool, ExtensiveErrorReports, \ ! PRODUCT_ONLY(false) NOT_PRODUCT(true), \ ! "Error reports are more extensive.") \ ! \ ! product(bool, DisplayVMOutputToStderr, false, \ ! "If DisplayVMOutput is true, display all VM output to stderr") \ ! \ ! product(bool, DisplayVMOutputToStdout, false, \ ! "If DisplayVMOutput is true, display all VM output to stdout") \ ! \ ! product(bool, ErrorFileToStderr, false, \ ! "If true, error data is printed to stderr instead of a file") \ ! \ ! product(bool, ErrorFileToStdout, false, \ ! "If true, error data is printed to stdout instead of a file") \ ! \ ! product(bool, UseHeavyMonitors, false, \ ! "use heavyweight instead of lightweight Java monitors") \ ! \ ! product(bool, PrintStringTableStatistics, false, \ ! "print statistics about the StringTable and SymbolTable") \ ! \ ! diagnostic(bool, VerifyStringTableAtExit, false, \ ! "verify StringTable contents at exit") \ ! \ ! notproduct(bool, PrintSymbolTableSizeHistogram, false, \ ! "print histogram of the symbol table") \ ! \ ! notproduct(bool, ExitVMOnVerifyError, false, \ ! "standard exit from VM if bytecode verify error " \ ! "(only in debug mode)") \ ! \ ! diagnostic(ccstr, AbortVMOnException, NULL, \ ! "Call fatal if this exception is thrown. Example: " \ ! "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ ! \ ! diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ ! "Call fatal if the exception pointed by AbortVMOnException " \ ! "has this message") \ ! \ ! develop(bool, DebugVtables, false, \ ! "add debugging code to vtable dispatch") \ ! \ ! notproduct(bool, PrintVtableStats, false, \ ! "print vtables stats at end of run") \ ! \ ! develop(bool, TraceCreateZombies, false, \ ! "trace creation of zombie nmethods") \ ! \ ! product(bool, RangeCheckElimination, true, \ ! "Eliminate range checks") \ ! \ ! develop_pd(bool, UncommonNullCast, \ ! "track occurrences of null in casts; adjust compiler tactics") \ ! \ ! develop(bool, TypeProfileCasts, true, \ ! "treat casts like calls for purposes of type profiling") \ ! \ ! develop(bool, TraceLivenessGen, false, \ ! "Trace the generation of liveness analysis information") \ ! \ ! notproduct(bool, TraceLivenessQuery, false, \ ! "Trace queries of liveness analysis information") \ ! \ ! notproduct(bool, CollectIndexSetStatistics, false, \ ! "Collect information about IndexSets") \ ! \ ! develop(bool, UseLoopSafepoints, true, \ ! "Generate Safepoint nodes in every loop") \ ! \ ! develop(intx, FastAllocateSizeLimit, 128*K, \ ! /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ ! "Inline allocations larger than this in doublewords must go slow")\ ! \ ! product_pd(bool, CompactStrings, \ ! "Enable Strings to use single byte chars in backing store") \ ! \ ! product_pd(uintx, TypeProfileLevel, \ ! "=XYZ, with Z: Type profiling of arguments at call; " \ ! "Y: Type profiling of return value at call; " \ ! "X: Type profiling of parameters to methods; " \ ! "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ ! constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ ! \ ! product(intx, TypeProfileArgsLimit, 2, \ ! "max number of call arguments to consider for type profiling") \ ! range(0, 16) \ ! \ ! product(intx, TypeProfileParmsLimit, 2, \ ! "max number of incoming parameters to consider for type profiling"\ ! ", -1 for all") \ ! range(-1, 64) \ ! \ ! /* statistics */ \ ! develop(bool, CountCompiledCalls, false, \ ! "Count method invocations") \ ! \ ! notproduct(bool, CountRuntimeCalls, false, \ ! "Count VM runtime calls") \ ! \ ! develop(bool, CountJNICalls, false, \ ! "Count jni method invocations") \ ! \ ! notproduct(bool, CountJVMCalls, false, \ ! "Count jvm method invocations") \ ! \ ! notproduct(bool, CountRemovableExceptions, false, \ ! "Count exceptions that could be replaced by branches due to " \ ! "inlining") \ ! \ ! notproduct(bool, ICMissHistogram, false, \ ! "Produce histogram of IC misses") \ ! \ ! /* interpreter */ \ ! product_pd(bool, RewriteBytecodes, \ ! "Allow rewriting of bytecodes (bytecodes are not immutable)") \ ! \ ! product_pd(bool, RewriteFrequentPairs, \ ! "Rewrite frequently used bytecode pairs into a single bytecode") \ ! \ ! diagnostic(bool, PrintInterpreter, false, \ ! "Print the generated interpreter code") \ ! \ ! product(bool, UseInterpreter, true, \ ! "Use interpreter for non-compiled methods") \ ! \ ! develop(bool, UseFastSignatureHandlers, true, \ ! "Use fast signature handlers for native calls") \ ! \ ! product(bool, UseLoopCounter, true, \ ! "Increment invocation counter on backward branch") \ ! \ ! product_pd(bool, UseOnStackReplacement, \ ! "Use on stack replacement, calls runtime if invoc. counter " \ ! "overflows in loop") \ ! \ ! notproduct(bool, TraceOnStackReplacement, false, \ ! "Trace on stack replacement") \ ! \ ! product_pd(bool, PreferInterpreterNativeStubs, \ ! "Use always interpreter stubs for native methods invoked via " \ ! "interpreter") \ ! \ ! develop(bool, CountBytecodes, false, \ ! "Count number of bytecodes executed") \ ! \ ! develop(bool, PrintBytecodeHistogram, false, \ ! "Print histogram of the executed bytecodes") \ ! \ ! develop(bool, PrintBytecodePairHistogram, false, \ ! "Print histogram of the executed bytecode pairs") \ ! \ ! diagnostic(bool, PrintSignatureHandlers, false, \ ! "Print code generated for native method signature handlers") \ ! \ ! develop(bool, VerifyOops, false, \ ! "Do plausibility checks for oops") \ ! \ ! develop(bool, CheckUnhandledOops, false, \ ! "Check for unhandled oops in VM code") \ ! \ ! develop(bool, VerifyJNIFields, trueInDebug, \ ! "Verify jfieldIDs for instance fields") \ ! \ ! notproduct(bool, VerifyJNIEnvThread, false, \ ! "Verify JNIEnv.thread == Thread::current() when entering VM " \ ! "from JNI") \ ! \ ! develop(bool, VerifyFPU, false, \ ! "Verify FPU state (check for NaN's, etc.)") \ ! \ ! develop(bool, VerifyThread, false, \ ! "Watch the thread register for corruption (SPARC only)") \ ! \ ! develop(bool, VerifyActivationFrameSize, false, \ ! "Verify that activation frame didn't become smaller than its " \ ! "minimal size") \ ! \ ! develop(bool, TraceFrequencyInlining, false, \ ! "Trace frequency based inlining") \ ! \ ! develop_pd(bool, InlineIntrinsics, \ ! "Inline intrinsics that can be statically resolved") \ ! \ ! product_pd(bool, ProfileInterpreter, \ ! "Profile at the bytecode level during interpretation") \ ! \ ! develop(bool, TraceProfileInterpreter, false, \ ! "Trace profiling at the bytecode level during interpretation. " \ ! "This outputs the profiling information collected to improve " \ ! "jit compilation.") \ ! \ ! develop_pd(bool, ProfileTraps, \ ! "Profile deoptimization traps at the bytecode level") \ ! \ ! product(intx, ProfileMaturityPercentage, 20, \ ! "number of method invocations/branches (expressed as % of " \ ! "CompileThreshold) before using the method's profile") \ ! range(0, 100) \ ! \ ! diagnostic(bool, PrintMethodData, false, \ ! "Print the results of +ProfileInterpreter at end of run") \ ! \ ! develop(bool, VerifyDataPointer, trueInDebug, \ ! "Verify the method data pointer during interpreter profiling") \ ! \ ! develop(bool, VerifyCompiledCode, false, \ ! "Include miscellaneous runtime verifications in nmethod code; " \ ! "default off because it disturbs nmethod size heuristics") \ ! \ ! notproduct(bool, CrashGCForDumpingJavaThread, false, \ ! "Manually make GC thread crash then dump java stack trace; " \ ! "Test only") \ ! \ ! /* compilation */ \ ! product(bool, UseCompiler, true, \ ! "Use Just-In-Time compilation") \ ! \ ! product(bool, UseCounterDecay, true, \ ! "Adjust recompilation counters") \ ! \ ! develop(intx, CounterHalfLifeTime, 30, \ ! "Half-life time of invocation counters (in seconds)") \ ! \ ! develop(intx, CounterDecayMinIntervalLength, 500, \ ! "The minimum interval (in milliseconds) between invocation of " \ ! "CounterDecay") \ ! \ ! product(bool, AlwaysCompileLoopMethods, false, \ ! "When using recompilation, never interpret methods " \ ! "containing loops") \ ! \ ! product(bool, DontCompileHugeMethods, true, \ ! "Do not compile methods > HugeMethodLimit") \ ! \ ! /* Bytecode escape analysis estimation. */ \ ! product(bool, EstimateArgEscape, true, \ ! "Analyze bytecodes to estimate escape state of arguments") \ ! \ ! product(intx, BCEATraceLevel, 0, \ ! "How much tracing to do of bytecode escape analysis estimates " \ ! "(0-3)") \ ! range(0, 3) \ ! \ ! product(intx, MaxBCEAEstimateLevel, 5, \ ! "Maximum number of nested calls that are analyzed by BC EA") \ ! range(0, max_jint) \ ! \ ! product(intx, MaxBCEAEstimateSize, 150, \ ! "Maximum bytecode size of a method to be analyzed by BC EA") \ ! range(0, max_jint) \ ! \ ! product(intx, AllocatePrefetchStyle, 1, \ ! "0 = no prefetch, " \ ! "1 = generate prefetch instructions for each allocation, " \ ! "2 = use TLAB watermark to gate allocation prefetch, " \ ! "3 = generate one prefetch instruction per cache line") \ ! range(0, 3) \ ! \ ! product(intx, AllocatePrefetchDistance, -1, \ ! "Distance to prefetch ahead of allocation pointer. " \ ! "-1: use system-specific value (automatically determined") \ ! constraint(AllocatePrefetchDistanceConstraintFunc,AfterMemoryInit)\ ! \ ! product(intx, AllocatePrefetchLines, 3, \ ! "Number of lines to prefetch ahead of array allocation pointer") \ ! range(1, 64) \ ! \ ! product(intx, AllocateInstancePrefetchLines, 1, \ ! "Number of lines to prefetch ahead of instance allocation " \ ! "pointer") \ ! range(1, 64) \ ! \ ! product(intx, AllocatePrefetchStepSize, 16, \ ! "Step size in bytes of sequential prefetch instructions") \ ! range(1, 512) \ ! constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ ! \ ! product(intx, AllocatePrefetchInstr, 0, \ ! "Select instruction to prefetch ahead of allocation pointer") \ ! constraint(AllocatePrefetchInstrConstraintFunc, AfterMemoryInit) \ ! \ ! /* deoptimization */ \ ! develop(bool, TraceDeoptimization, false, \ ! "Trace deoptimization") \ ! \ ! develop(bool, PrintDeoptimizationDetails, false, \ ! "Print more information about deoptimization") \ ! \ ! develop(bool, DebugDeoptimization, false, \ ! "Tracing various information while debugging deoptimization") \ ! \ ! product(intx, SelfDestructTimer, 0, \ ! "Will cause VM to terminate after a given time (in minutes) " \ ! "(0 means off)") \ ! range(0, max_intx) \ ! \ ! product(intx, MaxJavaStackTraceDepth, 1024, \ ! "The maximum number of lines in the stack trace for Java " \ ! "exceptions (0 means all)") \ ! range(0, max_jint/2) \ ! \ ! /* notice: the max range value here is max_jint, not max_intx */ \ ! /* because of overflow issue */ \ ! diagnostic(intx, GuaranteedSafepointInterval, 1000, \ ! "Guarantee a safepoint (at least) every so many milliseconds " \ ! "(0 means none)") \ ! range(0, max_jint) \ ! \ ! product(intx, SafepointTimeoutDelay, 10000, \ ! "Delay in milliseconds for option SafepointTimeout") \ ! LP64_ONLY(range(0, max_intx/MICROUNITS)) \ ! NOT_LP64(range(0, max_intx)) \ ! \ ! product(intx, NmethodSweepActivity, 10, \ ! "Removes cold nmethods from code cache if > 0. Higher values " \ ! "result in more aggressive sweeping") \ ! range(0, 2000) \ ! \ ! notproduct(bool, LogSweeper, false, \ ! "Keep a ring buffer of sweeper activity") \ ! \ ! notproduct(intx, SweeperLogEntries, 1024, \ ! "Number of records in the ring buffer of sweeper activity") \ ! \ ! notproduct(intx, MemProfilingInterval, 500, \ ! "Time between each invocation of the MemProfiler") \ ! \ ! develop(intx, MallocCatchPtr, -1, \ ! "Hit breakpoint when mallocing/freeing this pointer") \ ! \ ! notproduct(ccstrlist, SuppressErrorAt, "", \ ! "List of assertions (file:line) to muzzle") \ ! \ ! develop(intx, StackPrintLimit, 100, \ ! "number of stack frames to print in VM-level stack dump") \ ! \ ! notproduct(intx, MaxElementPrintSize, 256, \ ! "maximum number of elements to print") \ ! \ ! notproduct(intx, MaxSubklassPrintSize, 4, \ ! "maximum number of subklasses to print when printing klass") \ ! \ ! product(intx, MaxInlineLevel, 15, \ ! "maximum number of nested calls that are inlined") \ ! range(0, max_jint) \ ! \ ! product(intx, MaxRecursiveInlineLevel, 1, \ ! "maximum number of nested recursive calls that are inlined") \ ! range(0, max_jint) \ ! \ ! develop(intx, MaxForceInlineLevel, 100, \ ! "maximum number of nested calls that are forced for inlining " \ ! "(using CompileCommand or marked w/ @ForceInline)") \ ! range(0, max_jint) \ ! \ ! product_pd(intx, InlineSmallCode, \ ! "Only inline already compiled methods if their code size is " \ ! "less than this") \ ! range(0, max_jint) \ ! \ ! product(intx, MaxInlineSize, 35, \ ! "The maximum bytecode size of a method to be inlined") \ ! range(0, max_jint) \ ! \ ! product_pd(intx, FreqInlineSize, \ ! "The maximum bytecode size of a frequent method to be inlined") \ ! range(0, max_jint) \ ! \ ! product(intx, MaxTrivialSize, 6, \ ! "The maximum bytecode size of a trivial method to be inlined") \ ! range(0, max_jint) \ ! \ ! product(intx, MinInliningThreshold, 250, \ ! "The minimum invocation count a method needs to have to be " \ ! "inlined") \ ! range(0, max_jint) \ ! \ ! develop(intx, MethodHistogramCutoff, 100, \ ! "The cutoff value for method invocation histogram (+CountCalls)") \ ! \ ! develop(intx, DontYieldALotInterval, 10, \ ! "Interval between which yields will be dropped (milliseconds)") \ ! \ ! notproduct(intx, DeoptimizeALotInterval, 5, \ ! "Number of exits until DeoptimizeALot kicks in") \ ! \ ! notproduct(intx, ZombieALotInterval, 5, \ ! "Number of exits until ZombieALot kicks in") \ ! \ ! diagnostic(uintx, MallocMaxTestWords, 0, \ ! "If non-zero, maximum number of words that malloc/realloc can " \ ! "allocate (for testing only)") \ ! range(0, max_uintx) \ ! \ ! product(intx, TypeProfileWidth, 2, \ ! "Number of receiver types to record in call/cast profile") \ ! range(0, 8) \ ! \ ! develop(intx, BciProfileWidth, 2, \ ! "Number of return bci's to record in ret profile") \ ! \ ! product(intx, PerMethodRecompilationCutoff, 400, \ ! "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ ! range(-1, max_intx) \ ! \ ! product(intx, PerBytecodeRecompilationCutoff, 200, \ ! "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ ! range(-1, max_intx) \ ! \ ! product(intx, PerMethodTrapLimit, 100, \ ! "Limit on traps (of one kind) in a method (includes inlines)") \ ! range(0, max_jint) \ ! \ ! experimental(intx, PerMethodSpecTrapLimit, 5000, \ ! "Limit on speculative traps (of one kind) in a method " \ ! "(includes inlines)") \ ! range(0, max_jint) \ ! \ ! product(intx, PerBytecodeTrapLimit, 4, \ ! "Limit on traps (of one kind) at a particular BCI") \ ! range(0, max_jint) \ ! \ ! experimental(intx, SpecTrapLimitExtraEntries, 3, \ ! "Extra method data trap entries for speculation") \ ! \ ! develop(intx, InlineFrequencyRatio, 20, \ ! "Ratio of call site execution to caller method invocation") \ ! range(0, max_jint) \ ! \ ! diagnostic_pd(intx, InlineFrequencyCount, \ ! "Count of call site execution necessary to trigger frequent " \ ! "inlining") \ ! range(0, max_jint) \ ! \ ! develop(intx, InlineThrowCount, 50, \ ! "Force inlining of interpreted methods that throw this often") \ ! range(0, max_jint) \ ! \ ! develop(intx, InlineThrowMaxSize, 200, \ ! "Force inlining of throwing methods smaller than this") \ ! range(0, max_jint) \ ! \ ! develop(intx, ProfilerNodeSize, 1024, \ ! "Size in K to allocate for the Profile Nodes of each thread") \ ! range(0, 1024) \ ! \ ! product_pd(size_t, MetaspaceSize, \ ! "Initial threshold (in bytes) at which a garbage collection " \ ! "is done to reduce Metaspace usage") \ ! constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ ! \ ! product(size_t, MaxMetaspaceSize, max_uintx, \ ! "Maximum size of Metaspaces (in bytes)") \ ! constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ ! \ ! product(size_t, CompressedClassSpaceSize, 1*G, \ ! "Maximum size of class area in Metaspace when compressed " \ ! "class pointers are used") \ ! range(1*M, 3*G) \ ! \ ! manageable(uintx, MinHeapFreeRatio, 40, \ ! "The minimum percentage of heap free after GC to avoid expansion."\ ! " For most GCs this applies to the old generation. In G1 and" \ ! " ParallelGC it applies to the whole heap.") \ ! range(0, 100) \ ! constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ ! \ ! manageable(uintx, MaxHeapFreeRatio, 70, \ ! "The maximum percentage of heap free after GC to avoid shrinking."\ ! " For most GCs this applies to the old generation. In G1 and" \ ! " ParallelGC it applies to the whole heap.") \ ! range(0, 100) \ ! constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ ! \ ! product(bool, ShrinkHeapInSteps, true, \ ! "When disabled, informs the GC to shrink the java heap directly" \ ! " to the target size at the next full GC rather than requiring" \ ! " smaller steps during multiple full GCs.") \ ! \ ! product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ ! "Number of milliseconds per MB of free space in the heap") \ ! range(0, max_intx) \ ! constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ ! \ ! product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ ! "The minimum change in heap space due to GC (in bytes)") \ ! range(0, max_uintx) \ ! \ ! product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ ! "The minimum expansion of Metaspace (in bytes)") \ ! range(0, max_uintx) \ ! \ ! product(uintx, MaxMetaspaceFreeRatio, 70, \ ! "The maximum percentage of Metaspace free after GC to avoid " \ ! "shrinking") \ ! range(0, 100) \ ! constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ ! \ ! product(uintx, MinMetaspaceFreeRatio, 40, \ ! "The minimum percentage of Metaspace free after GC to avoid " \ ! "expansion") \ ! range(0, 99) \ ! constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ ! \ ! product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ ! "The maximum expansion of Metaspace without full GC (in bytes)") \ ! range(0, max_uintx) \ ! \ ! /* stack parameters */ \ ! product_pd(intx, StackYellowPages, \ ! "Number of yellow zone (recoverable overflows) pages of size " \ ! "4KB. If pages are bigger yellow zone is aligned up.") \ ! range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ ! \ ! product_pd(intx, StackRedPages, \ ! "Number of red zone (unrecoverable overflows) pages of size " \ ! "4KB. If pages are bigger red zone is aligned up.") \ ! range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ ! \ ! product_pd(intx, StackReservedPages, \ ! "Number of reserved zone (reserved to annotated methods) pages" \ ! " of size 4KB. If pages are bigger reserved zone is aligned up.") \ ! range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ ! \ ! product(bool, RestrictReservedStack, true, \ ! "Restrict @ReservedStackAccess to trusted classes") \ ! \ ! /* greater stack shadow pages can't generate instruction to bang stack */ \ ! product_pd(intx, StackShadowPages, \ ! "Number of shadow zone (for overflow checking) pages of size " \ ! "4KB. If pages are bigger shadow zone is aligned up. " \ ! "This should exceed the depth of the VM and native call stack.") \ ! range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ ! \ ! product_pd(intx, ThreadStackSize, \ ! "Thread Stack Size (in Kbytes)") \ ! range(0, 1 * M) \ ! \ ! product_pd(intx, VMThreadStackSize, \ ! "Non-Java Thread Stack Size (in Kbytes)") \ ! range(0, max_intx/(1 * K)) \ ! \ ! product_pd(intx, CompilerThreadStackSize, \ ! "Compiler Thread Stack Size (in Kbytes)") \ ! range(0, max_intx/(1 * K)) \ ! \ ! develop_pd(size_t, JVMInvokeMethodSlack, \ ! "Stack space (bytes) required for JVM_InvokeMethod to complete") \ ! \ ! /* code cache parameters */ \ ! develop_pd(uintx, CodeCacheSegmentSize, \ ! "Code cache segment size (in bytes) - smallest unit of " \ ! "allocation") \ ! range(1, 1024) \ ! constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ ! \ ! develop_pd(intx, CodeEntryAlignment, \ ! "Code entry alignment for generated code (in bytes)") \ ! constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ ! \ ! product_pd(intx, OptoLoopAlignment, \ ! "Align inner loops to zero relative to this modulus") \ ! range(1, 16) \ ! constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ ! \ ! product_pd(uintx, InitialCodeCacheSize, \ ! "Initial code cache size (in bytes)") \ ! range(os::vm_page_size(), max_uintx) \ ! \ ! develop_pd(uintx, CodeCacheMinimumUseSpace, \ ! "Minimum code cache size (in bytes) required to start VM.") \ ! range(0, max_uintx) \ ! \ ! product(bool, SegmentedCodeCache, false, \ ! "Use a segmented code cache") \ ! \ ! product_pd(uintx, ReservedCodeCacheSize, \ ! "Reserved code cache size (in bytes) - maximum code cache size") \ ! range(os::vm_page_size(), max_uintx) \ ! \ ! product_pd(uintx, NonProfiledCodeHeapSize, \ ! "Size of code heap with non-profiled methods (in bytes)") \ ! range(0, max_uintx) \ ! \ ! product_pd(uintx, ProfiledCodeHeapSize, \ ! "Size of code heap with profiled methods (in bytes)") \ ! range(0, max_uintx) \ ! \ ! product_pd(uintx, NonNMethodCodeHeapSize, \ ! "Size of code heap with non-nmethods (in bytes)") \ ! range(os::vm_page_size(), max_uintx) \ ! \ ! product_pd(uintx, CodeCacheExpansionSize, \ ! "Code cache expansion size (in bytes)") \ ! range(32*K, max_uintx) \ ! \ ! diagnostic_pd(uintx, CodeCacheMinBlockLength, \ ! "Minimum number of segments in a code cache block") \ ! range(1, 100) \ ! \ ! notproduct(bool, ExitOnFullCodeCache, false, \ ! "Exit the VM if we fill the code cache") \ ! \ ! product(bool, UseCodeCacheFlushing, true, \ ! "Remove cold/old nmethods from the code cache") \ ! \ ! product(uintx, StartAggressiveSweepingAt, 10, \ ! "Start aggressive sweeping if X[%] of the code cache is free." \ ! "Segmented code cache: X[%] of the non-profiled heap." \ ! "Non-segmented code cache: X[%] of the total code cache") \ ! range(0, 100) \ ! \ ! /* AOT parameters */ \ ! experimental(bool, UseAOT, false, \ ! "Use AOT compiled files") \ ! \ ! experimental(ccstrlist, AOTLibrary, NULL, \ ! "AOT library") \ ! \ ! experimental(bool, PrintAOT, false, \ ! "Print used AOT klasses and methods") \ ! \ ! notproduct(bool, PrintAOTStatistics, false, \ ! "Print AOT statistics") \ ! \ ! diagnostic(bool, UseAOTStrictLoading, false, \ ! "Exit the VM if any of the AOT libraries has invalid config") \ ! \ ! product(bool, CalculateClassFingerprint, false, \ ! "Calculate class fingerprint") \ ! \ ! /* interpreter debugging */ \ ! develop(intx, BinarySwitchThreshold, 5, \ ! "Minimal number of lookupswitch entries for rewriting to binary " \ ! "switch") \ ! \ ! develop(intx, StopInterpreterAt, 0, \ ! "Stop interpreter execution at specified bytecode number") \ ! \ ! develop(intx, TraceBytecodesAt, 0, \ ! "Trace bytecodes starting with specified bytecode number") \ ! \ ! /* compiler interface */ \ ! develop(intx, CIStart, 0, \ ! "The id of the first compilation to permit") \ ! \ ! develop(intx, CIStop, max_jint, \ ! "The id of the last compilation to permit") \ ! \ ! develop(intx, CIStartOSR, 0, \ ! "The id of the first osr compilation to permit " \ ! "(CICountOSR must be on)") \ ! \ ! develop(intx, CIStopOSR, max_jint, \ ! "The id of the last osr compilation to permit " \ ! "(CICountOSR must be on)") \ ! \ ! develop(intx, CIBreakAtOSR, -1, \ ! "The id of osr compilation to break at") \ ! \ ! develop(intx, CIBreakAt, -1, \ ! "The id of compilation to break at") \ ! \ ! product(ccstrlist, CompileOnly, "", \ ! "List of methods (pkg/class.name) to restrict compilation to") \ ! \ ! product(ccstr, CompileCommandFile, NULL, \ ! "Read compiler commands from this file [.hotspot_compiler]") \ ! \ ! diagnostic(ccstr, CompilerDirectivesFile, NULL, \ ! "Read compiler directives from this file") \ ! \ ! product(ccstrlist, CompileCommand, "", \ ! "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ ! \ ! develop(bool, ReplayCompiles, false, \ ! "Enable replay of compilations from ReplayDataFile") \ ! \ ! product(ccstr, ReplayDataFile, NULL, \ ! "File containing compilation replay information" \ ! "[default: ./replay_pid%p.log] (%p replaced with pid)") \ ! \ ! product(ccstr, InlineDataFile, NULL, \ ! "File containing inlining replay information" \ ! "[default: ./inline_pid%p.log] (%p replaced with pid)") \ ! \ ! develop(intx, ReplaySuppressInitializers, 2, \ ! "Control handling of class initialization during replay: " \ ! "0 - don't do anything special; " \ ! "1 - treat all class initializers as empty; " \ ! "2 - treat class initializers for application classes as empty; " \ ! "3 - allow all class initializers to run during bootstrap but " \ ! " pretend they are empty after starting replay") \ ! range(0, 3) \ ! \ ! develop(bool, ReplayIgnoreInitErrors, false, \ ! "Ignore exceptions thrown during initialization for replay") \ ! \ ! product(bool, DumpReplayDataOnError, true, \ ! "Record replay data for crashing compiler threads") \ ! \ ! product(bool, CICompilerCountPerCPU, false, \ ! "1 compiler thread for log(N CPUs)") \ ! \ ! notproduct(intx, CICrashAt, -1, \ ! "id of compilation to trigger assert in compiler thread for " \ ! "the purpose of testing, e.g. generation of replay data") \ ! notproduct(bool, CIObjectFactoryVerify, false, \ ! "enable potentially expensive verification in ciObjectFactory") \ ! \ ! diagnostic(bool, AbortVMOnCompilationFailure, false, \ ! "Abort VM when method had failed to compile.") \ ! \ ! /* Priorities */ \ ! product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ ! \ ! product(intx, ThreadPriorityPolicy, 0, \ ! "0 : Normal. "\ ! " VM chooses priorities that are appropriate for normal "\ ! " applications. On Solaris NORM_PRIORITY and above are mapped "\ ! " to normal native priority. Java priorities below " \ ! " NORM_PRIORITY map to lower native priority values. On "\ ! " Windows applications are allowed to use higher native "\ ! " priorities. However, with ThreadPriorityPolicy=0, VM will "\ ! " not use the highest possible native priority, "\ ! " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ ! " system threads. On Linux thread priorities are ignored "\ ! " because the OS does not support static priority in "\ ! " SCHED_OTHER scheduling class which is the only choice for "\ ! " non-root, non-realtime applications. "\ ! "1 : Aggressive. "\ ! " Java thread priorities map over to the entire range of "\ ! " native thread priorities. Higher Java thread priorities map "\ ! " to higher native thread priorities. This policy should be "\ ! " used with care, as sometimes it can cause performance "\ ! " degradation in the application and/or the entire system. On "\ ! " Linux/BSD/macOS this policy requires root privilege or an "\ ! " extended capability.") \ ! range(0, 1) \ ! \ ! product(bool, ThreadPriorityVerbose, false, \ ! "Print priority changes") \ ! \ ! product(intx, CompilerThreadPriority, -1, \ ! "The native priority at which compiler threads should run " \ ! "(-1 means no change)") \ ! range(min_jint, max_jint) \ ! constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ ! \ ! product(intx, VMThreadPriority, -1, \ ! "The native priority at which the VM thread should run " \ ! "(-1 means no change)") \ ! range(-1, 127) \ ! \ ! product(intx, JavaPriority1_To_OSPriority, -1, \ ! "Map Java priorities to OS priorities") \ ! range(-1, 127) \ ! \ ! product(intx, JavaPriority2_To_OSPriority, -1, \ ! "Map Java priorities to OS priorities") \ ! range(-1, 127) \ ! \ ! product(intx, JavaPriority3_To_OSPriority, -1, \ ! "Map Java priorities to OS priorities") \ ! range(-1, 127) \ ! \ ! product(intx, JavaPriority4_To_OSPriority, -1, \ ! "Map Java priorities to OS priorities") \ ! range(-1, 127) \ ! \ ! product(intx, JavaPriority5_To_OSPriority, -1, \ ! "Map Java priorities to OS priorities") \ ! range(-1, 127) \ ! \ ! product(intx, JavaPriority6_To_OSPriority, -1, \ ! "Map Java priorities to OS priorities") \ ! range(-1, 127) \ ! \ ! product(intx, JavaPriority7_To_OSPriority, -1, \ ! "Map Java priorities to OS priorities") \ ! range(-1, 127) \ ! \ ! product(intx, JavaPriority8_To_OSPriority, -1, \ ! "Map Java priorities to OS priorities") \ ! range(-1, 127) \ ! \ ! product(intx, JavaPriority9_To_OSPriority, -1, \ ! "Map Java priorities to OS priorities") \ ! range(-1, 127) \ ! \ ! product(intx, JavaPriority10_To_OSPriority,-1, \ ! "Map Java priorities to OS priorities") \ ! range(-1, 127) \ ! \ ! experimental(bool, UseCriticalJavaThreadPriority, false, \ ! "Java thread priority 10 maps to critical scheduling priority") \ ! \ ! experimental(bool, UseCriticalCompilerThreadPriority, false, \ ! "Compiler thread(s) run at critical scheduling priority") \ ! \ ! develop(intx, NewCodeParameter, 0, \ ! "Testing Only: Create a dedicated integer parameter before " \ ! "putback") \ ! \ ! /* new oopmap storage allocation */ \ ! develop(intx, MinOopMapAllocation, 8, \ ! "Minimum number of OopMap entries in an OopMapSet") \ ! \ ! /* Background Compilation */ \ ! develop(intx, LongCompileThreshold, 50, \ ! "Used with +TraceLongCompiles") \ ! \ ! /* recompilation */ \ ! product_pd(intx, CompileThreshold, \ ! "number of interpreted method invocations before (re-)compiling") \ ! constraint(CompileThresholdConstraintFunc, AfterErgo) \ ! \ ! product(double, CompileThresholdScaling, 1.0, \ ! "Factor to control when first compilation happens " \ ! "(both with and without tiered compilation): " \ ! "values greater than 1.0 delay counter overflow, " \ ! "values between 0 and 1.0 rush counter overflow, " \ ! "value of 1.0 leaves compilation thresholds unchanged " \ ! "value of 0.0 is equivalent to -Xint. " \ ! "" \ ! "Flag can be set as per-method option. " \ ! "If a value is specified for a method, compilation thresholds " \ ! "for that method are scaled by both the value of the global flag "\ ! "and the value of the per-method flag.") \ ! range(0.0, DBL_MAX) \ ! \ ! product(intx, Tier0InvokeNotifyFreqLog, 7, \ ! "Interpreter (tier 0) invocation notification frequency") \ ! range(0, 30) \ ! \ ! product(intx, Tier2InvokeNotifyFreqLog, 11, \ ! "C1 without MDO (tier 2) invocation notification frequency") \ ! range(0, 30) \ ! \ ! product(intx, Tier3InvokeNotifyFreqLog, 10, \ ! "C1 with MDO profiling (tier 3) invocation notification " \ ! "frequency") \ ! range(0, 30) \ ! \ ! product(intx, Tier23InlineeNotifyFreqLog, 20, \ ! "Inlinee invocation (tiers 2 and 3) notification frequency") \ ! range(0, 30) \ ! \ ! product(intx, Tier0BackedgeNotifyFreqLog, 10, \ ! "Interpreter (tier 0) invocation notification frequency") \ ! range(0, 30) \ ! \ ! product(intx, Tier2BackedgeNotifyFreqLog, 14, \ ! "C1 without MDO (tier 2) invocation notification frequency") \ ! range(0, 30) \ ! \ ! product(intx, Tier3BackedgeNotifyFreqLog, 13, \ ! "C1 with MDO profiling (tier 3) invocation notification " \ ! "frequency") \ ! range(0, 30) \ ! \ ! product(intx, Tier2CompileThreshold, 0, \ ! "threshold at which tier 2 compilation is invoked") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier2BackEdgeThreshold, 0, \ ! "Back edge threshold at which tier 2 compilation is invoked") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier3InvocationThreshold, 200, \ ! "Compile if number of method invocations crosses this " \ ! "threshold") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier3MinInvocationThreshold, 100, \ ! "Minimum invocation to compile at tier 3") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier3CompileThreshold, 2000, \ ! "Threshold at which tier 3 compilation is invoked (invocation " \ ! "minimum must be satisfied)") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier3BackEdgeThreshold, 60000, \ ! "Back edge threshold at which tier 3 OSR compilation is invoked") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier3AOTInvocationThreshold, 10000, \ ! "Compile if number of method invocations crosses this " \ ! "threshold if coming from AOT") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier3AOTMinInvocationThreshold, 1000, \ ! "Minimum invocation to compile at tier 3 if coming from AOT") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier3AOTCompileThreshold, 15000, \ ! "Threshold at which tier 3 compilation is invoked (invocation " \ ! "minimum must be satisfied) if coming from AOT") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier3AOTBackEdgeThreshold, 120000, \ ! "Back edge threshold at which tier 3 OSR compilation is invoked " \ ! "if coming from AOT") \ ! range(0, max_jint) \ ! \ ! diagnostic(intx, Tier0AOTInvocationThreshold, 200, \ ! "Switch to interpreter to profile if the number of method " \ ! "invocations crosses this threshold if coming from AOT " \ ! "(applicable only with " \ ! "CompilationMode=high-only|high-only-quick-internal)") \ ! range(0, max_jint) \ ! \ ! diagnostic(intx, Tier0AOTMinInvocationThreshold, 100, \ ! "Minimum number of invocations to switch to interpreter " \ ! "to profile if coming from AOT " \ ! "(applicable only with " \ ! "CompilationMode=high-only|high-only-quick-internal)") \ ! range(0, max_jint) \ ! \ ! diagnostic(intx, Tier0AOTCompileThreshold, 2000, \ ! "Threshold at which to switch to interpreter to profile " \ ! "if coming from AOT " \ ! "(invocation minimum must be satisfied, " \ ! "applicable only with " \ ! "CompilationMode=high-only|high-only-quick-internal)") \ ! range(0, max_jint) \ ! \ ! diagnostic(intx, Tier0AOTBackEdgeThreshold, 60000, \ ! "Back edge threshold at which to switch to interpreter " \ ! "to profile if coming from AOT " \ ! "(applicable only with " \ ! "CompilationMode=high-only|high-only-quick-internal)") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier4InvocationThreshold, 5000, \ ! "Compile if number of method invocations crosses this " \ ! "threshold") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier4MinInvocationThreshold, 600, \ ! "Minimum invocation to compile at tier 4") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier4CompileThreshold, 15000, \ ! "Threshold at which tier 4 compilation is invoked (invocation " \ ! "minimum must be satisfied)") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier4BackEdgeThreshold, 40000, \ ! "Back edge threshold at which tier 4 OSR compilation is invoked") \ ! range(0, max_jint) \ ! \ ! diagnostic(intx, Tier40InvocationThreshold, 5000, \ ! "Compile if number of method invocations crosses this " \ ! "threshold (applicable only with " \ ! "CompilationMode=high-only|high-only-quick-internal)") \ ! range(0, max_jint) \ ! \ ! diagnostic(intx, Tier40MinInvocationThreshold, 600, \ ! "Minimum number of invocations to compile at tier 4 " \ ! "(applicable only with " \ ! "CompilationMode=high-only|high-only-quick-internal)") \ ! range(0, max_jint) \ ! \ ! diagnostic(intx, Tier40CompileThreshold, 10000, \ ! "Threshold at which tier 4 compilation is invoked (invocation " \ ! "minimum must be satisfied, applicable only with " \ ! "CompilationMode=high-only|high-only-quick-internal)") \ ! range(0, max_jint) \ ! \ ! diagnostic(intx, Tier40BackEdgeThreshold, 15000, \ ! "Back edge threshold at which tier 4 OSR compilation is invoked " \ ! "(applicable only with " \ ! "CompilationMode=high-only|high-only-quick-internal)") \ ! range(0, max_jint) \ ! \ ! diagnostic(intx, Tier0Delay, 5, \ ! "If C2 queue size grows over this amount per compiler thread " \ ! "do not start profiling in the interpreter " \ ! "(applicable only with " \ ! "CompilationMode=high-only|high-only-quick-internal)") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier3DelayOn, 5, \ ! "If C2 queue size grows over this amount per compiler thread " \ ! "stop compiling at tier 3 and start compiling at tier 2") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier3DelayOff, 2, \ ! "If C2 queue size is less than this amount per compiler thread " \ ! "allow methods compiled at tier 2 transition to tier 3") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier3LoadFeedback, 5, \ ! "Tier 3 thresholds will increase twofold when C1 queue size " \ ! "reaches this amount per compiler thread") \ ! range(0, max_jint) \ ! \ ! product(intx, Tier4LoadFeedback, 3, \ ! "Tier 4 thresholds will increase twofold when C2 queue size " \ ! "reaches this amount per compiler thread") \ ! range(0, max_jint) \ ! \ ! product(intx, TieredCompileTaskTimeout, 50, \ ! "Kill compile task if method was not used within " \ ! "given timeout in milliseconds") \ ! range(0, max_intx) \ ! \ ! product(intx, TieredStopAtLevel, 4, \ ! "Stop at given compilation level") \ ! range(0, 4) \ ! \ ! product(intx, Tier0ProfilingStartPercentage, 200, \ ! "Start profiling in interpreter if the counters exceed tier 3 " \ ! "thresholds (tier 4 thresholds with " \ ! "CompilationMode=high-only|high-only-quick-internal)" \ ! "by the specified percentage") \ ! range(0, max_jint) \ ! \ ! product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ ! "Increase the compile threshold for C1 compilation if the code " \ ! "cache is filled by the specified percentage") \ ! range(0, 99) \ ! \ ! product(intx, TieredRateUpdateMinTime, 1, \ ! "Minimum rate sampling interval (in milliseconds)") \ ! range(0, max_intx) \ ! \ ! product(intx, TieredRateUpdateMaxTime, 25, \ ! "Maximum rate sampling interval (in milliseconds)") \ ! range(0, max_intx) \ ! \ ! product(ccstr, CompilationMode, "default", \ ! "Compilation modes: " \ ! "default: normal tiered compilation; " \ ! "quick-only: C1-only mode; " \ ! "high-only: C2/JVMCI-only mode; " \ ! "high-only-quick-internal: C2/JVMCI-only mode, " \ ! "with JVMCI compiler compiled with C1.") \ ! \ ! product_pd(bool, TieredCompilation, \ ! "Enable tiered compilation") \ ! \ ! product(bool, PrintTieredEvents, false, \ ! "Print tiered events notifications") \ ! \ ! product_pd(intx, OnStackReplacePercentage, \ ! "NON_TIERED number of method invocations/branches (expressed as " \ ! "% of CompileThreshold) before (re-)compiling OSR code") \ ! constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ ! \ ! product(intx, InterpreterProfilePercentage, 33, \ ! "NON_TIERED number of method invocations/branches (expressed as " \ ! "% of CompileThreshold) before profiling in the interpreter") \ ! range(0, 100) \ ! \ ! develop(intx, DesiredMethodLimit, 8000, \ ! "The desired maximum method size (in bytecodes) after inlining") \ ! \ ! develop(intx, HugeMethodLimit, 8000, \ ! "Don't compile methods larger than this if " \ ! "+DontCompileHugeMethods") \ ! \ ! /* Properties for Java libraries */ \ ! \ ! product(uint64_t, MaxDirectMemorySize, 0, \ ! "Maximum total size of NIO direct-buffer allocations") \ ! range(0, max_jlong) \ ! \ ! /* Flags used for temporary code during development */ \ ! \ ! diagnostic(bool, UseNewCode, false, \ ! "Testing Only: Use the new version while testing") \ ! \ ! diagnostic(bool, UseNewCode2, false, \ ! "Testing Only: Use the new version while testing") \ ! \ ! diagnostic(bool, UseNewCode3, false, \ ! "Testing Only: Use the new version while testing") \ ! \ ! /* flags for performance data collection */ \ ! \ ! product(bool, UsePerfData, true, \ ! "Flag to disable jvmstat instrumentation for performance testing "\ ! "and problem isolation purposes") \ ! \ ! product(bool, PerfDataSaveToFile, false, \ ! "Save PerfData memory to hsperfdata_<pid> file on exit") \ ! \ ! product(ccstr, PerfDataSaveFile, NULL, \ ! "Save PerfData memory to the specified absolute pathname. " \ ! "The string %p in the file name (if present) " \ ! "will be replaced by pid") \ ! \ ! product(intx, PerfDataSamplingInterval, 50, \ ! "Data sampling interval (in milliseconds)") \ ! range(PeriodicTask::min_interval, max_jint) \ ! constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ ! \ ! product(bool, PerfDisableSharedMem, false, \ ! "Store performance data in standard memory") \ ! \ ! product(intx, PerfDataMemorySize, 32*K, \ ! "Size of performance data memory region. Will be rounded " \ ! "up to a multiple of the native os page size.") \ ! range(128, 32*64*K) \ ! \ ! product(intx, PerfMaxStringConstLength, 1024, \ ! "Maximum PerfStringConstant string length before truncation") \ ! range(32, 32*K) \ ! \ ! product(bool, PerfAllowAtExitRegistration, false, \ ! "Allow registration of atexit() methods") \ ! \ ! product(bool, PerfBypassFileSystemCheck, false, \ ! "Bypass Win32 file system criteria checks (Windows Only)") \ ! \ ! product(intx, UnguardOnExecutionViolation, 0, \ ! "Unguard page and retry on no-execute fault (Win32 only) " \ ! "0=off, 1=conservative, 2=aggressive") \ ! range(0, 2) \ ! \ ! /* Serviceability Support */ \ ! \ ! product(bool, ManagementServer, false, \ ! "Create JMX Management Server") \ ! \ ! product(bool, DisableAttachMechanism, false, \ ! "Disable mechanism that allows tools to attach to this VM") \ ! \ ! product(bool, StartAttachListener, false, \ ! "Always start Attach Listener at VM startup") \ ! \ ! product(bool, EnableDynamicAgentLoading, true, \ ! "Allow tools to load agents with the attach mechanism") \ ! \ ! manageable(bool, PrintConcurrentLocks, false, \ ! "Print java.util.concurrent locks in thread dump") \ ! \ ! /* Shared spaces */ \ ! \ ! product(bool, UseSharedSpaces, true, \ ! "Use shared spaces for metadata") \ ! \ ! product(bool, VerifySharedSpaces, false, \ ! "Verify integrity of shared spaces") \ ! \ ! product(bool, RequireSharedSpaces, false, \ ! "Require shared spaces for metadata") \ ! \ ! product(bool, DumpSharedSpaces, false, \ ! "Special mode: JVM reads a class list, loads classes, builds " \ ! "shared spaces, and dumps the shared spaces to a file to be " \ ! "used in future JVM runs") \ ! \ ! product(bool, DynamicDumpSharedSpaces, false, \ ! "Dynamic archive") \ ! \ ! product(bool, PrintSharedArchiveAndExit, false, \ ! "Print shared archive file contents") \ ! \ ! product(bool, PrintSharedDictionary, false, \ ! "If PrintSharedArchiveAndExit is true, also print the shared " \ ! "dictionary") \ ! \ ! product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ ! NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ ! "Address to allocate shared memory region for class data") \ ! range(0, SIZE_MAX) \ ! \ ! product(ccstr, SharedArchiveConfigFile, NULL, \ ! "Data to add to the CDS archive file") \ ! \ ! product(uintx, SharedSymbolTableBucketSize, 4, \ ! "Average number of symbols per bucket in shared table") \ ! range(2, 246) \ ! \ ! diagnostic(bool, AllowArchivingWithJavaAgent, false, \ ! "Allow Java agent to be run with CDS dumping") \ ! \ ! diagnostic(bool, PrintMethodHandleStubs, false, \ ! "Print generated stub code for method handles") \ ! \ ! develop(bool, TraceMethodHandles, false, \ ! "trace internal method handle operations") \ ! \ ! diagnostic(bool, VerifyMethodHandles, trueInDebug, \ ! "perform extra checks when constructing method handles") \ ! \ ! diagnostic(bool, ShowHiddenFrames, false, \ ! "show method handle implementation frames (usually hidden)") \ ! \ ! experimental(bool, TrustFinalNonStaticFields, false, \ ! "trust final non-static declarations for constant folding") \ ! \ ! diagnostic(bool, FoldStableValues, true, \ ! "Optimize loads from stable fields (marked w/ @Stable)") \ ! \ ! develop(bool, TraceInvokeDynamic, false, \ ! "trace internal invoke dynamic operations") \ ! \ ! diagnostic(int, UseBootstrapCallInfo, 1, \ ! "0: when resolving InDy or ConDy, force all BSM arguments to be " \ ! "resolved before the bootstrap method is called; 1: when a BSM " \ ! "that may accept a BootstrapCallInfo is detected, use that API " \ ! "to pass BSM arguments, which allows the BSM to delay their " \ ! "resolution; 2+: stress test the BCI API by calling more BSMs " \ ! "via that API, instead of with the eagerly-resolved array.") \ ! \ ! diagnostic(bool, PauseAtStartup, false, \ ! "Causes the VM to pause at startup time and wait for the pause " \ ! "file to be removed (default: ./vm.paused.<pid>)") \ ! \ ! diagnostic(ccstr, PauseAtStartupFile, NULL, \ ! "The file to create and for whose removal to await when pausing " \ ! "at startup. (default: ./vm.paused.<pid>)") \ ! \ ! diagnostic(bool, PauseAtExit, false, \ ! "Pause and wait for keypress on exit if a debugger is attached") \ ! \ ! product(bool, ExtendedDTraceProbes, false, \ ! "Enable performance-impacting dtrace probes") \ ! \ ! product(bool, DTraceMethodProbes, false, \ ! "Enable dtrace probes for method-entry and method-exit") \ ! \ ! product(bool, DTraceAllocProbes, false, \ ! "Enable dtrace probes for object allocation") \ ! \ ! product(bool, DTraceMonitorProbes, false, \ ! "Enable dtrace probes for monitor events") \ ! \ ! product(bool, RelaxAccessControlCheck, false, \ ! "Relax the access control checks in the verifier") \ ! \ ! product(uintx, StringTableSize, defaultStringTableSize, \ ! "Number of buckets in the interned String table " \ ! "(will be rounded to nearest higher power of 2)") \ ! range(minimumStringTableSize, 16777216ul /* 2^24 */) \ ! \ ! experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ ! "Number of buckets in the JVM internal Symbol table") \ ! range(minimumSymbolTableSize, 16777216ul /* 2^24 */) \ ! \ ! product(bool, UseStringDeduplication, false, \ ! "Use string deduplication") \ ! \ ! product(uintx, StringDeduplicationAgeThreshold, 3, \ ! "A string must reach this age (or be promoted to an old region) " \ ! "to be considered for deduplication") \ ! range(1, markWord::max_age) \ ! \ ! diagnostic(bool, StringDeduplicationResizeALot, false, \ ! "Force table resize every time the table is scanned") \ ! \ ! diagnostic(bool, StringDeduplicationRehashALot, false, \ ! "Force table rehash every time the table is scanned") \ ! \ ! diagnostic(bool, WhiteBoxAPI, false, \ ! "Enable internal testing APIs") \ ! \ ! experimental(intx, SurvivorAlignmentInBytes, 0, \ ! "Default survivor space alignment in bytes") \ ! range(8, 256) \ ! constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ ! \ ! product(ccstr, DumpLoadedClassList, NULL, \ ! "Dump the names all loaded classes, that could be stored into " \ ! "the CDS archive, in the specified file") \ ! \ ! product(ccstr, SharedClassListFile, NULL, \ ! "Override the default CDS class list") \ ! \ ! product(ccstr, SharedArchiveFile, NULL, \ ! "Override the default location of the CDS archive file") \ ! \ ! product(ccstr, ArchiveClassesAtExit, NULL, \ ! "The path and name of the dynamic archive file") \ ! \ ! product(ccstr, ExtraSharedClassListFile, NULL, \ ! "Extra classlist for building the CDS archive file") \ ! \ ! diagnostic(intx, ArchiveRelocationMode, 0, \ ! "(0) first map at preferred address, and if " \ ! "unsuccessful, map at alternative address (default); " \ ! "(1) always map at alternative address; " \ ! "(2) always map at preferred address, and if unsuccessful, " \ ! "do not map the archive") \ ! range(0, 2) \ ! \ ! experimental(size_t, ArrayAllocatorMallocLimit, \ ! SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ ! "Allocation less than this value will be allocated " \ ! "using malloc. Larger allocations will use mmap.") \ ! \ ! experimental(bool, AlwaysAtomicAccesses, false, \ ! "Accesses to all variables should always be atomic") \ ! \ ! diagnostic(bool, UseUnalignedAccesses, false, \ ! "Use unaligned memory accesses in Unsafe") \ ! \ ! product_pd(bool, PreserveFramePointer, \ ! "Use the FP register for holding the frame pointer " \ ! "and not as a general purpose register.") \ ! \ ! diagnostic(bool, CheckIntrinsics, true, \ ! "When a class C is loaded, check that " \ ! "(1) all intrinsics defined by the VM for class C are present "\ ! "in the loaded class file and are marked with the " \ ! "@HotSpotIntrinsicCandidate annotation, that " \ ! "(2) there is an intrinsic registered for all loaded methods " \ ! "that are annotated with the @HotSpotIntrinsicCandidate " \ ! "annotation, and that " \ ! "(3) no orphan methods exist for class C (i.e., methods for " \ ! "which the VM declares an intrinsic but that are not declared "\ ! "in the loaded class C. " \ ! "Check (3) is available only in debug builds.") \ ! \ ! diagnostic_pd(intx, InitArrayShortSize, \ ! "Threshold small size (in bytes) for clearing arrays. " \ ! "Anything this size or smaller may get converted to discrete " \ ! "scalar stores.") \ ! range(0, max_intx) \ ! constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ ! \ ! diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ ! "Disable backwards compatibility for compile commands.") \ ! \ ! diagnostic(bool, CompilerDirectivesPrint, false, \ ! "Print compiler directives on installation.") \ ! diagnostic(int, CompilerDirectivesLimit, 50, \ ! "Limit on number of compiler directives.") \ ! \ ! product(ccstr, AllocateHeapAt, NULL, \ ! "Path to the directoy where a temporary file will be created " \ ! "to use as the backing store for Java Heap.") \ ! \ ! experimental(ccstr, AllocateOldGenAt, NULL, \ ! "Path to the directoy where a temporary file will be " \ ! "created to use as the backing store for old generation." \ ! "File of size Xmx is pre-allocated for performance reason, so" \ ! "we need that much space available") \ ! \ ! develop(int, VerifyMetaspaceInterval, DEBUG_ONLY(500) NOT_DEBUG(0), \ ! "Run periodic metaspace verifications (0 - none, " \ ! "1 - always, >1 every nth interval)") \ ! \ ! diagnostic(bool, ShowRegistersOnAssert, true, \ ! "On internal errors, include registers in error report.") \ ! \ ! diagnostic(bool, UseSwitchProfiling, true, \ ! "leverage profiling for table/lookup switch") \ ! \ ! develop(bool, TraceMemoryWriteback, false, \ ! "Trace memory writeback operations") \ ! \ ! JFR_ONLY(product(bool, FlightRecorder, false, \ ! "(Deprecated) Enable Flight Recorder")) \ ! \ ! JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL, \ ! "Flight Recorder options")) \ ! \ ! JFR_ONLY(product(ccstr, StartFlightRecording, NULL, \ ! "Start flight recording with options")) \ ! \ ! experimental(bool, UseFastUnorderedTimeStamps, false, \ ! "Use platform unstable time where supported for timestamps only") \ ! \ ! product(bool, UseNewFieldLayout, true, \ ! "(Deprecated) Use new algorithm to compute field layouts") \ ! \ ! product(bool, UseEmptySlotsInSupers, true, \ ! "Allow allocating fields in empty slots of super-classes") \ ! \ ! ! ! // Interface macros ! #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; ! #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; ! #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; ! #define DECLARE_PD_DIAGNOSTIC_FLAG(type, name, doc) extern "C" type name; ! #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; ! #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; ! #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; ! #ifdef PRODUCT ! #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; ! #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; ! #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; ! #else ! #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; ! #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; ! #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; ! #endif // PRODUCT ! // Special LP64 flags, product only needed for now. ! #ifdef _LP64 ! #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; ! #else ! #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; ! #endif // _LP64 ! ALL_FLAGS(DECLARE_DEVELOPER_FLAG, \ ! DECLARE_PD_DEVELOPER_FLAG, \ ! DECLARE_PRODUCT_FLAG, \ ! DECLARE_PD_PRODUCT_FLAG, \ ! DECLARE_DIAGNOSTIC_FLAG, \ ! DECLARE_PD_DIAGNOSTIC_FLAG, \ ! DECLARE_EXPERIMENTAL_FLAG, \ ! DECLARE_NOTPRODUCT_FLAG, \ ! DECLARE_MANAGEABLE_FLAG, \ ! DECLARE_PRODUCT_RW_FLAG, \ ! DECLARE_LP64_PRODUCT_FLAG, \ ! IGNORE_RANGE, \ ! IGNORE_CONSTRAINT) #endif // SHARE_RUNTIME_GLOBALS_HPP --- 148,2574 ---- // - the flag is defined in a CCC as an external exported interface. // - the VM implementation supports dynamic setting of the flag. // This implies that the VM must *always* query the flag variable // and not reuse state related to the flag state at any given time. // - you want the flag to be queried programmatically by the customers. + + + // Additional flag attributes // ! // In addition to the 3 bits described above, more can be specified. These ! // usually only affects the printing of the flag (see java -XX:PrintFlagsFinal). ! // However, you can also write code to process a certain group of ! // flags. See JVMCIGlobals::check_jvmci_flags_are_consistent() for an example. // ! // JVMFlag::PLATFORM_DEPENDENT ! // JVMFlag::C1 ! // JVMFlag::C2 ! // JVMFlag::ARCH ! // JVMFlag::JVMCI // ! // To add these extra bits to a group of flags, you can use the FLAG_COMMON_ATTRS ! // macro. See c2_globals.cpp for an example. ! // Default and minimum StringTable and SymbolTable size values // Must be powers of 2 const size_t defaultStringTableSize = NOT_LP64(1024) LP64_ONLY(65536); const size_t minimumStringTableSize = 128; const size_t defaultSymbolTableSize = 32768; // 2^15 const size_t minimumSymbolTableSize = 1024; ! #include "runtime/flags/jvmFlag.hpp" ! NOTPROD_FLAG(bool, CheckCompressedOops, true, JVMFlag::DEFAULT, ! "Generate checks in encoding/decoding code in debug VM"); ! ! PRODUCT_FLAG(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), JVMFlag::RANGE, ! "Heap allocation steps through preferred address regions to find" ! " where it can allocate the heap. Number of steps to take per " ! "region."); ! FLAG_RANGE( HeapSearchSteps, 1, max_uintx); ! ! DEVELOP_FLAG(bool, CleanChunkPoolAsync, true, JVMFlag::DEFAULT, ! "Clean the chunk pool asynchronously"); ! ! PRODUCT_FLAG(uint, HandshakeTimeout, 0, JVMFlag::DIAGNOSTIC, ! "If nonzero set a timeout in milliseconds for handshakes"); ! ! PRODUCT_FLAG(bool, AlwaysSafeConstructors, false, JVMFlag::EXPERIMENTAL, ! "Force safe construction, as if all fields are final."); ! ! PRODUCT_FLAG(bool, UnlockDiagnosticVMOptions, trueInDebug, JVMFlag::DIAGNOSTIC, ! "Enable normal processing of flags relating to field diagnostics"); ! ! PRODUCT_FLAG(bool, UnlockExperimentalVMOptions, false, JVMFlag::EXPERIMENTAL, ! "Enable normal processing of flags relating to experimental " ! "features"); ! ! PRODUCT_FLAG(bool, JavaMonitorsInStackTrace, true, JVMFlag::DEFAULT, ! "Print information about Java monitor locks when the stacks are" ! "dumped"); ! ! PRODUCT_FLAG_PD(bool, UseLargePages, JVMFlag::DEFAULT, ! "Use large page memory"); ! ! PRODUCT_FLAG_PD(bool, UseLargePagesIndividualAllocation, JVMFlag::DEFAULT, ! "Allocate large pages individually for better affinity"); ! ! DEVELOP_FLAG(bool, LargePagesIndividualAllocationInjectError, false, JVMFlag::DEFAULT, ! "Fail large pages individual allocation"); ! ! PRODUCT_FLAG(bool, UseLargePagesInMetaspace, false, JVMFlag::DEFAULT, ! "Use large page memory in metaspace. " ! "Only used if UseLargePages is enabled."); ! ! PRODUCT_FLAG(bool, UseNUMA, false, JVMFlag::DEFAULT, ! "Use NUMA if available"); ! ! PRODUCT_FLAG(bool, UseNUMAInterleaving, false, JVMFlag::DEFAULT, ! "Interleave memory across NUMA nodes if available"); ! ! PRODUCT_FLAG(size_t, NUMAInterleaveGranularity, 2*M, JVMFlag::RANGE, ! "Granularity to use for NUMA interleaving on Windows OS"); ! FLAG_CUSTOM_RANGE( NUMAInterleaveGranularity, VMAllocationGranularity); ! ! PRODUCT_FLAG(bool, ForceNUMA, false, JVMFlag::DEFAULT, ! "Force NUMA optimizations on single-node/UMA systems"); ! ! PRODUCT_FLAG(uintx, NUMAChunkResizeWeight, 20, JVMFlag::RANGE, ! "Percentage (0-100) used to weight the current sample when " ! "computing exponentially decaying average for " ! "AdaptiveNUMAChunkSizing"); ! FLAG_RANGE( NUMAChunkResizeWeight, 0, 100); ! ! PRODUCT_FLAG(size_t, NUMASpaceResizeRate, 1*G, JVMFlag::RANGE, ! "Do not reallocate more than this amount per collection"); ! FLAG_RANGE( NUMASpaceResizeRate, 0, max_uintx); ! ! PRODUCT_FLAG(bool, UseAdaptiveNUMAChunkSizing, true, JVMFlag::DEFAULT, ! "Enable adaptive chunk sizing for NUMA"); ! ! PRODUCT_FLAG(bool, NUMAStats, false, JVMFlag::DEFAULT, ! "Print NUMA stats in detailed heap information"); ! ! PRODUCT_FLAG(uintx, NUMAPageScanRate, 256, JVMFlag::RANGE, ! "Maximum number of pages to include in the page scan procedure"); ! FLAG_RANGE( NUMAPageScanRate, 0, max_uintx); ! ! PRODUCT_FLAG(bool, UseAES, false, JVMFlag::DEFAULT, ! "Control whether AES instructions are used when available"); ! ! PRODUCT_FLAG(bool, UseFMA, false, JVMFlag::DEFAULT, ! "Control whether FMA instructions are used when available"); ! ! PRODUCT_FLAG(bool, UseSHA, false, JVMFlag::DEFAULT, ! "Control whether SHA instructions are used when available"); ! ! PRODUCT_FLAG(bool, UseGHASHIntrinsics, false, JVMFlag::DIAGNOSTIC, ! "Use intrinsics for GHASH versions of crypto"); ! ! PRODUCT_FLAG(bool, UseBASE64Intrinsics, false, JVMFlag::DEFAULT, ! "Use intrinsics for java.util.Base64"); ! ! PRODUCT_FLAG(size_t, LargePageSizeInBytes, 0, JVMFlag::RANGE, ! "Large page size (0 to let VM choose the page size)"); ! FLAG_RANGE( LargePageSizeInBytes, 0, max_uintx); ! ! PRODUCT_FLAG(size_t, LargePageHeapSizeThreshold, 128*M, JVMFlag::RANGE, ! "Use large pages if maximum heap is at least this big"); ! FLAG_RANGE( LargePageHeapSizeThreshold, 0, max_uintx); ! ! PRODUCT_FLAG(bool, ForceTimeHighResolution, false, JVMFlag::DEFAULT, ! "Using high time resolution (for Win32 only)"); ! ! DEVELOP_FLAG(bool, TracePcPatching, false, JVMFlag::DEFAULT, ! "Trace usage of frame::patch_pc"); ! ! DEVELOP_FLAG(bool, TraceRelocator, false, JVMFlag::DEFAULT, ! "Trace the bytecode relocator"); ! ! DEVELOP_FLAG(bool, TraceLongCompiles, false, JVMFlag::DEFAULT, ! "Print out every time compilation is longer than " ! "a given threshold"); ! ! PRODUCT_FLAG(bool, SafepointALot, false, JVMFlag::DIAGNOSTIC, ! "Generate a lot of safepoints. This works with " ! "GuaranteedSafepointInterval"); ! ! PRODUCT_FLAG(bool, HandshakeALot, false, JVMFlag::DIAGNOSTIC, ! "Generate a lot of handshakes. This works with " ! "GuaranteedSafepointInterval"); ! ! PRODUCT_FLAG_PD(bool, BackgroundCompilation, JVMFlag::DEFAULT, ! "A thread requesting compilation is not blocked during " ! "compilation"); ! ! PRODUCT_FLAG(bool, PrintVMQWaitTime, false, JVMFlag::DEFAULT, ! "(Deprecated) Print out the waiting time in VM operation queue"); ! ! PRODUCT_FLAG(bool, MethodFlushing, true, JVMFlag::DEFAULT, ! "Reclamation of zombie and not-entrant methods"); ! ! DEVELOP_FLAG(bool, VerifyStack, false, JVMFlag::DEFAULT, ! "Verify stack of each thread when it is entering a runtime call"); ! ! PRODUCT_FLAG(bool, ForceUnreachable, false, JVMFlag::DIAGNOSTIC, ! "Make all non code cache addresses to be unreachable by " ! "forcing use of 64bit literal fixups"); ! ! NOTPROD_FLAG(bool, StressDerivedPointers, false, JVMFlag::DEFAULT, ! "Force scavenge when a derived pointer is detected on stack " ! "after rtm call"); ! ! DEVELOP_FLAG(bool, TraceDerivedPointers, false, JVMFlag::DEFAULT, ! "Trace traversal of derived pointers on stack"); ! ! NOTPROD_FLAG(bool, TraceCodeBlobStacks, false, JVMFlag::DEFAULT, ! "Trace stack-walk of codeblobs"); ! ! NOTPROD_FLAG(bool, PrintRewrites, false, JVMFlag::DEFAULT, ! "Print methods that are being rewritten"); ! ! PRODUCT_FLAG(bool, UseInlineCaches, true, JVMFlag::DEFAULT, ! "Use Inline Caches for virtual calls "); ! ! PRODUCT_FLAG(bool, InlineArrayCopy, true, JVMFlag::DIAGNOSTIC, ! "Inline arraycopy native that is known to be part of " ! "base library DLL"); ! ! PRODUCT_FLAG(bool, InlineObjectHash, true, JVMFlag::DIAGNOSTIC, ! "Inline Object::hashCode() native that is known to be part " ! "of base library DLL"); ! ! PRODUCT_FLAG(bool, InlineNatives, true, JVMFlag::DIAGNOSTIC, ! "Inline natives that are known to be part of base library DLL"); ! ! PRODUCT_FLAG(bool, InlineMathNatives, true, JVMFlag::DIAGNOSTIC, ! "Inline SinD, CosD, etc."); ! ! PRODUCT_FLAG(bool, InlineClassNatives, true, JVMFlag::DIAGNOSTIC, ! "Inline Class.isInstance, etc"); ! ! PRODUCT_FLAG(bool, InlineThreadNatives, true, JVMFlag::DIAGNOSTIC, ! "Inline Thread.currentThread, etc"); ! ! PRODUCT_FLAG(bool, InlineUnsafeOps, true, JVMFlag::DIAGNOSTIC, ! "Inline memory ops (native methods) from Unsafe"); ! ! PRODUCT_FLAG(bool, CriticalJNINatives, true, JVMFlag::DEFAULT, ! "Check for critical JNI entry points"); ! ! NOTPROD_FLAG(bool, StressCriticalJNINatives, false, JVMFlag::DEFAULT, ! "Exercise register saving code in critical natives"); ! ! PRODUCT_FLAG(bool, UseAESIntrinsics, false, JVMFlag::DIAGNOSTIC, ! "Use intrinsics for AES versions of crypto"); ! ! PRODUCT_FLAG(bool, UseAESCTRIntrinsics, false, JVMFlag::DIAGNOSTIC, ! "Use intrinsics for the paralleled version of AES/CTR crypto"); ! ! PRODUCT_FLAG(bool, UseSHA1Intrinsics, false, JVMFlag::DIAGNOSTIC, ! "Use intrinsics for SHA-1 crypto hash function. " ! "Requires that UseSHA is enabled."); ! ! PRODUCT_FLAG(bool, UseSHA256Intrinsics, false, JVMFlag::DIAGNOSTIC, ! "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " ! "Requires that UseSHA is enabled."); ! ! PRODUCT_FLAG(bool, UseSHA512Intrinsics, false, JVMFlag::DIAGNOSTIC, ! "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " ! "Requires that UseSHA is enabled."); ! ! PRODUCT_FLAG(bool, UseCRC32Intrinsics, false, JVMFlag::DIAGNOSTIC, ! "use intrinsics for java.util.zip.CRC32"); ! ! PRODUCT_FLAG(bool, UseCRC32CIntrinsics, false, JVMFlag::DIAGNOSTIC, ! "use intrinsics for java.util.zip.CRC32C"); ! ! PRODUCT_FLAG(bool, UseAdler32Intrinsics, false, JVMFlag::DIAGNOSTIC, ! "use intrinsics for java.util.zip.Adler32"); ! ! PRODUCT_FLAG(bool, UseVectorizedMismatchIntrinsic, false, JVMFlag::DIAGNOSTIC, ! "Enables intrinsification of ArraysSupport.vectorizedMismatch()"); ! ! PRODUCT_FLAG(ccstr, DisableIntrinsic, "", JVMFlag::DIAGNOSTIC | JVMFlag::STRINGLIST, ! "do not expand intrinsics whose (internal) names appear here"); ! ! DEVELOP_FLAG(bool, TraceCallFixup, false, JVMFlag::DEFAULT, ! "Trace all call fixups"); ! ! DEVELOP_FLAG(bool, DeoptimizeALot, false, JVMFlag::DEFAULT, ! "Deoptimize at every exit from the runtime system"); ! ! NOTPROD_FLAG(ccstr, DeoptimizeOnlyAt, "", JVMFlag::STRINGLIST, ! "A comma separated list of bcis to deoptimize at"); ! ! DEVELOP_FLAG(bool, DeoptimizeRandom, false, JVMFlag::DEFAULT, ! "Deoptimize random frames on random exit from the runtime system"); ! ! NOTPROD_FLAG(bool, ZombieALot, false, JVMFlag::DEFAULT, ! "Create zombies (non-entrant) at exit from the runtime system"); ! ! NOTPROD_FLAG(bool, WalkStackALot, false, JVMFlag::DEFAULT, ! "Trace stack (no print) at every exit from the runtime system"); ! ! PRODUCT_FLAG(bool, Debugging, false, JVMFlag::DEFAULT, ! "Set when executing debug methods in debug.cpp " ! "(to prevent triggering assertions)"); ! ! NOTPROD_FLAG(bool, VerifyLastFrame, false, JVMFlag::DEFAULT, ! "Verify oops on last frame on entry to VM"); ! ! PRODUCT_FLAG(bool, SafepointTimeout, false, JVMFlag::DEFAULT, ! "Time out and warn or fail after SafepointTimeoutDelay " ! "milliseconds if failed to reach safepoint"); ! ! PRODUCT_FLAG(bool, AbortVMOnSafepointTimeout, false, JVMFlag::DIAGNOSTIC, ! "Abort upon failure to reach safepoint (see SafepointTimeout)"); ! ! PRODUCT_FLAG(bool, AbortVMOnVMOperationTimeout, false, JVMFlag::DIAGNOSTIC, ! "Abort upon failure to complete VM operation promptly"); ! ! PRODUCT_FLAG(intx, AbortVMOnVMOperationTimeoutDelay, 1000, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Delay in milliseconds for option AbortVMOnVMOperationTimeout"); ! FLAG_RANGE( AbortVMOnVMOperationTimeoutDelay, 0, max_intx); ! ! ! // 50 retries * (5 * current_retry_count) millis = ~6.375 seconds ! // typically, at most a few retries are needed ! PRODUCT_FLAG(intx, SuspendRetryCount, 50, JVMFlag::RANGE, ! "Maximum retry count for an external suspend request"); ! FLAG_RANGE( SuspendRetryCount, 0, max_intx); ! ! PRODUCT_FLAG(intx, SuspendRetryDelay, 5, JVMFlag::RANGE, ! "Milliseconds to delay per retry (* current_retry_count)"); ! FLAG_RANGE( SuspendRetryDelay, 0, max_intx); ! ! PRODUCT_FLAG(bool, AssertOnSuspendWaitFailure, false, JVMFlag::DEFAULT, ! "Assert/Guarantee on external suspend wait failure"); ! ! PRODUCT_FLAG(bool, TraceSuspendWaitFailures, false, JVMFlag::DEFAULT, ! "Trace external suspend wait failures"); ! ! PRODUCT_FLAG(bool, MaxFDLimit, true, JVMFlag::DEFAULT, ! "Bump the number of file descriptors to maximum in Solaris"); ! ! PRODUCT_FLAG(bool, LogEvents, true, JVMFlag::DIAGNOSTIC, ! "Enable the various ring buffer event logs"); ! ! PRODUCT_FLAG(uintx, LogEventsBufferEntries, 20, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Number of ring buffer event logs"); ! FLAG_RANGE( LogEventsBufferEntries, 1, NOT_LP64(1*K) LP64_ONLY(1*M)); ! ! PRODUCT_FLAG(bool, BytecodeVerificationRemote, true, JVMFlag::DIAGNOSTIC, ! "Enable the Java bytecode verifier for remote classes"); ! ! PRODUCT_FLAG(bool, BytecodeVerificationLocal, false, JVMFlag::DIAGNOSTIC, ! "Enable the Java bytecode verifier for local classes"); ! ! DEVELOP_FLAG(bool, ForceFloatExceptions, trueInDebug, JVMFlag::DEFAULT, ! "Force exceptions on FP stack under/overflow"); ! ! DEVELOP_FLAG(bool, VerifyStackAtCalls, false, JVMFlag::DEFAULT, ! "Verify that the stack pointer is unchanged after calls"); ! ! DEVELOP_FLAG(bool, TraceJavaAssertions, false, JVMFlag::DEFAULT, ! "Trace java language assertions"); ! ! NOTPROD_FLAG(bool, VerifyCodeCache, false, JVMFlag::DEFAULT, ! "Verify code cache on memory allocation/deallocation"); ! ! DEVELOP_FLAG(bool, UseMallocOnly, false, JVMFlag::DEFAULT, ! "Use only malloc/free for allocation (no resource area/arena)"); ! ! DEVELOP_FLAG(bool, ZapResourceArea, trueInDebug, JVMFlag::DEFAULT, ! "Zap freed resource/arena space with 0xABABABAB"); ! ! NOTPROD_FLAG(bool, ZapVMHandleArea, trueInDebug, JVMFlag::DEFAULT, ! "Zap freed VM handle space with 0xBCBCBCBC"); ! ! NOTPROD_FLAG(bool, ZapStackSegments, trueInDebug, JVMFlag::DEFAULT, ! "Zap allocated/freed stack segments with 0xFADFADED"); ! ! DEVELOP_FLAG(bool, ZapUnusedHeapArea, trueInDebug, JVMFlag::DEFAULT, ! "Zap unused heap space with 0xBAADBABE"); ! ! DEVELOP_FLAG(bool, CheckZapUnusedHeapArea, false, JVMFlag::DEFAULT, ! "Check zapping of unused heap space"); ! ! DEVELOP_FLAG(bool, ZapFillerObjects, trueInDebug, JVMFlag::DEFAULT, ! "Zap filler objects with 0xDEAFBABE"); ! ! DEVELOP_FLAG(bool, PrintVMMessages, true, JVMFlag::DEFAULT, ! "Print VM messages on console"); ! ! NOTPROD_FLAG(uintx, ErrorHandlerTest, 0, JVMFlag::DEFAULT, ! "If > 0, provokes an error after VM initialization; the value " ! "determines which error to provoke. See test_error_handler() " ! "in vmError.cpp."); ! ! NOTPROD_FLAG(uintx, TestCrashInErrorHandler, 0, JVMFlag::DEFAULT, ! "If > 0, provokes an error inside VM error handler (a secondary " ! "crash). see test_error_handler() in vmError.cpp"); ! ! NOTPROD_FLAG(bool, TestSafeFetchInErrorHandler, false, JVMFlag::DEFAULT, ! "If true, tests SafeFetch inside error handler."); ! ! DEVELOP_FLAG(bool, TestUnresponsiveErrorHandler, false, JVMFlag::DEFAULT, ! "If true, simulates an unresponsive error handler."); ! ! DEVELOP_FLAG(bool, Verbose, false, JVMFlag::DEFAULT, ! "Print additional debugging information from other modes"); ! ! DEVELOP_FLAG(bool, PrintMiscellaneous, false, JVMFlag::DEFAULT, ! "Print uncategorized debugging information (requires +Verbose)"); ! ! DEVELOP_FLAG(bool, WizardMode, false, JVMFlag::DEFAULT, ! "Print much more debugging information"); ! ! PRODUCT_FLAG(bool, ShowMessageBoxOnError, false, JVMFlag::DEFAULT, ! "Keep process alive on VM fatal error"); ! ! PRODUCT_FLAG(bool, CreateCoredumpOnCrash, true, JVMFlag::DEFAULT, ! "Create core/mini dump on VM fatal error"); ! ! PRODUCT_FLAG(uint64_t, ErrorLogTimeout, 2 * 60, JVMFlag::RANGE, ! "Timeout, in seconds, to limit the time spent on writing an " ! "error log in case of a crash."); ! FLAG_RANGE( ErrorLogTimeout, 0, (uint64_t)max_jlong/1000); ! ! PRODUCT_FLAG_PD(bool, UseOSErrorReporting, JVMFlag::DEFAULT, ! "Let VM fatal error propagate to the OS (ie. WER on Windows)"); ! ! PRODUCT_FLAG(bool, SuppressFatalErrorMessage, false, JVMFlag::DEFAULT, ! "Report NO fatal error message (avoid deadlock)"); ! ! PRODUCT_FLAG(ccstr, OnError, "", JVMFlag::STRINGLIST, ! "Run user-defined commands on fatal error; see VMError.cpp " ! "for examples"); ! ! PRODUCT_FLAG(ccstr, OnOutOfMemoryError, "", JVMFlag::STRINGLIST, ! "Run user-defined commands on first java.lang.OutOfMemoryError"); ! ! PRODUCT_FLAG(bool, HeapDumpBeforeFullGC, false, JVMFlag::MANAGEABLE, ! "Dump heap to file before any major stop-the-world GC"); ! ! PRODUCT_FLAG(bool, HeapDumpAfterFullGC, false, JVMFlag::MANAGEABLE, ! "Dump heap to file after any major stop-the-world GC"); ! ! PRODUCT_FLAG(bool, HeapDumpOnOutOfMemoryError, false, JVMFlag::MANAGEABLE, ! "Dump heap to file when java.lang.OutOfMemoryError is thrown"); ! ! PRODUCT_FLAG(ccstr, HeapDumpPath, NULL, JVMFlag::MANAGEABLE, ! "When HeapDumpOnOutOfMemoryError is on, the path (filename or " ! "directory) of the dump file (defaults to java_pid<pid>.hprof " ! "in the working directory)"); ! ! DEVELOP_FLAG(bool, BreakAtWarning, false, JVMFlag::DEFAULT, ! "Execute breakpoint upon encountering VM warning"); ! ! PRODUCT_FLAG(ccstr, NativeMemoryTracking, "off", JVMFlag::DEFAULT, ! "Native memory tracking options"); ! ! PRODUCT_FLAG(bool, PrintNMTStatistics, false, JVMFlag::DIAGNOSTIC, ! "Print native memory tracking summary data if it is on"); ! ! PRODUCT_FLAG(bool, LogCompilation, false, JVMFlag::DIAGNOSTIC, ! "Log compilation activity in detail to LogFile"); ! ! PRODUCT_FLAG(bool, PrintCompilation, false, JVMFlag::DEFAULT, ! "Print compilations"); ! ! PRODUCT_FLAG(bool, PrintExtendedThreadInfo, false, JVMFlag::DEFAULT, ! "Print more information in thread dump"); ! ! PRODUCT_FLAG(intx, ScavengeRootsInCode, 2, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "0: do not allow scavengable oops in the code cache; " ! "1: allow scavenging from the code cache; " ! "2: emit as many constants as the compiler can see"); ! FLAG_RANGE( ScavengeRootsInCode, 0, 2); ! ! PRODUCT_FLAG(bool, AlwaysRestoreFPU, false, JVMFlag::DEFAULT, ! "Restore the FPU control word after every JNI call (expensive)"); ! ! PRODUCT_FLAG(bool, PrintCompilation2, false, JVMFlag::DIAGNOSTIC, ! "Print additional statistics per compilation"); ! ! PRODUCT_FLAG(bool, PrintAdapterHandlers, false, JVMFlag::DIAGNOSTIC, ! "Print code generated for i2c/c2i adapters"); ! ! PRODUCT_FLAG(bool, VerifyAdapterCalls, trueInDebug, JVMFlag::DIAGNOSTIC, ! "Verify that i2c/c2i adapters are called properly"); ! ! DEVELOP_FLAG(bool, VerifyAdapterSharing, false, JVMFlag::DEFAULT, ! "Verify that the code for shared adapters is the equivalent"); ! ! PRODUCT_FLAG(bool, PrintAssembly, false, JVMFlag::DIAGNOSTIC, ! "Print assembly code (using external disassembler.so)"); ! ! PRODUCT_FLAG(ccstr, PrintAssemblyOptions, NULL, JVMFlag::DIAGNOSTIC, ! "Print options string passed to disassembler.so"); ! ! NOTPROD_FLAG(bool, PrintNMethodStatistics, false, JVMFlag::DEFAULT, ! "Print a summary statistic for the generated nmethods"); ! ! PRODUCT_FLAG(bool, PrintNMethods, false, JVMFlag::DIAGNOSTIC, ! "Print assembly code for nmethods when generated"); ! ! PRODUCT_FLAG(bool, PrintNativeNMethods, false, JVMFlag::DIAGNOSTIC, ! "Print assembly code for native nmethods when generated"); ! ! DEVELOP_FLAG(bool, PrintDebugInfo, false, JVMFlag::DEFAULT, ! "Print debug information for all nmethods when generated"); ! ! DEVELOP_FLAG(bool, PrintRelocations, false, JVMFlag::DEFAULT, ! "Print relocation information for all nmethods when generated"); ! ! DEVELOP_FLAG(bool, PrintDependencies, false, JVMFlag::DEFAULT, ! "Print dependency information for all nmethods when generated"); ! ! DEVELOP_FLAG(bool, PrintExceptionHandlers, false, JVMFlag::DEFAULT, ! "Print exception handler tables for all nmethods when generated"); ! ! DEVELOP_FLAG(bool, StressCompiledExceptionHandlers, false, JVMFlag::DEFAULT, ! "Exercise compiled exception handlers"); ! ! DEVELOP_FLAG(bool, InterceptOSException, false, JVMFlag::DEFAULT, ! "Start debugger when an implicit OS (e.g. NULL) " ! "exception happens"); ! ! PRODUCT_FLAG(bool, PrintCodeCache, false, JVMFlag::DEFAULT, ! "Print the code cache memory usage when exiting"); ! ! DEVELOP_FLAG(bool, PrintCodeCache2, false, JVMFlag::DEFAULT, ! "Print detailed usage information on the code cache when exiting"); ! ! PRODUCT_FLAG(bool, PrintCodeCacheOnCompilation, false, JVMFlag::DEFAULT, ! "Print the code cache memory usage each time a method is " ! "compiled"); ! ! PRODUCT_FLAG(bool, PrintCodeHeapAnalytics, false, JVMFlag::DIAGNOSTIC, ! "Print code heap usage statistics on exit and on full condition"); ! ! PRODUCT_FLAG(bool, PrintStubCode, false, JVMFlag::DIAGNOSTIC, ! "Print generated stub code"); ! ! PRODUCT_FLAG(bool, StackTraceInThrowable, true, JVMFlag::DEFAULT, ! "Collect backtrace in throwable when exception happens"); ! ! PRODUCT_FLAG(bool, OmitStackTraceInFastThrow, true, JVMFlag::DEFAULT, ! "Omit backtraces for some 'hot' exceptions in optimized code"); ! ! PRODUCT_FLAG(bool, ShowCodeDetailsInExceptionMessages, false, JVMFlag::MANAGEABLE, ! "Show exception messages from RuntimeExceptions that contain " ! "snippets of the failing code. Disable this to improve privacy."); ! ! PRODUCT_FLAG(bool, PrintWarnings, true, JVMFlag::DEFAULT, ! "Print JVM warnings to output stream"); ! ! NOTPROD_FLAG(uintx, WarnOnStalledSpinLock, 0, JVMFlag::DEFAULT, ! "Print warnings for stalled SpinLocks"); ! ! PRODUCT_FLAG(bool, RegisterFinalizersAtInit, true, JVMFlag::DEFAULT, ! "Register finalizable objects at end of Object.<init> or " ! "after allocation"); ! ! DEVELOP_FLAG(bool, RegisterReferences, true, JVMFlag::DEFAULT, ! "Tell whether the VM should register soft/weak/final/phantom " ! "references"); ! ! DEVELOP_FLAG(bool, IgnoreRewrites, false, JVMFlag::DEFAULT, ! "Suppress rewrites of bytecodes in the oopmap generator. " ! "This is unsafe!"); ! ! DEVELOP_FLAG(bool, PrintCodeCacheExtension, false, JVMFlag::DEFAULT, ! "Print extension of code cache"); ! ! DEVELOP_FLAG(bool, UsePrivilegedStack, true, JVMFlag::DEFAULT, ! "Enable the security JVM functions"); ! ! DEVELOP_FLAG(bool, ProtectionDomainVerification, true, JVMFlag::DEFAULT, ! "Verify protection domain before resolution in system dictionary"); ! ! PRODUCT_FLAG(bool, ClassUnloading, true, JVMFlag::DEFAULT, ! "Do unloading of classes"); ! ! PRODUCT_FLAG(bool, ClassUnloadingWithConcurrentMark, true, JVMFlag::DEFAULT, ! "Do unloading of classes with a concurrent marking cycle"); ! ! DEVELOP_FLAG(bool, DisableStartThread, false, JVMFlag::DEFAULT, ! "Disable starting of additional Java threads " ! "(for debugging only)"); ! ! DEVELOP_FLAG(bool, MemProfiling, false, JVMFlag::DEFAULT, ! "Write memory usage profiling to log file"); ! ! DEVELOP_FLAG(bool, PrintSystemDictionaryAtExit, false, JVMFlag::DEFAULT, ! "Print the system dictionary at exit"); ! ! PRODUCT_FLAG(bool, DynamicallyResizeSystemDictionaries, true, JVMFlag::DIAGNOSTIC, ! "Dynamically resize system dictionaries as needed"); ! ! PRODUCT_FLAG(bool, AlwaysLockClassLoader, false, JVMFlag::DEFAULT, ! "Require the VM to acquire the class loader lock before calling " ! "loadClass() even for class loaders registering " ! "as parallel capable"); ! ! PRODUCT_FLAG(bool, AllowParallelDefineClass, false, JVMFlag::DEFAULT, ! "Allow parallel defineClass requests for class loaders " ! "registering as parallel capable"); ! ! PRODUCT_FLAG_PD(bool, DontYieldALot, JVMFlag::DEFAULT, ! "Throw away obvious excess yield calls"); ! ! DEVELOP_FLAG(bool, UseDetachedThreads, true, JVMFlag::DEFAULT, ! "Use detached threads that are recycled upon termination " ! "(for Solaris only)"); ! ! PRODUCT_FLAG(bool, DisablePrimordialThreadGuardPages, false, JVMFlag::EXPERIMENTAL, ! "Disable the use of stack guard pages if the JVM is loaded " ! "on the primordial process thread"); ! ! PRODUCT_FLAG(bool, UseLWPSynchronization, true, JVMFlag::DEFAULT, ! "Use LWP-based instead of libthread-based synchronization " ! "(SPARC only)"); ! ! PRODUCT_FLAG(intx, MonitorBound, 0, JVMFlag::RANGE, ! "(Deprecated) Bound Monitor population"); ! FLAG_RANGE( MonitorBound, 0, max_jint); ! ! PRODUCT_FLAG(intx, MonitorUsedDeflationThreshold, 90, JVMFlag::EXPERIMENTAL | JVMFlag::RANGE, ! "Percentage of used monitors before triggering cleanup " ! "safepoint which deflates monitors (0 is off). " ! "The check is performed on GuaranteedSafepointInterval."); ! FLAG_RANGE( MonitorUsedDeflationThreshold, 0, 100); ! ! PRODUCT_FLAG(intx, hashCode, 5, JVMFlag::EXPERIMENTAL, ! "(Unstable) select hashCode generation algorithm"); ! ! PRODUCT_FLAG(bool, FilterSpuriousWakeups, true, JVMFlag::DEFAULT, ! "When true prevents OS-level spurious, or premature, wakeups " ! "from Object.wait (Ignored for Windows)"); ! ! DEVELOP_FLAG(bool, UsePthreads, false, JVMFlag::DEFAULT, ! "Use pthread-based instead of libthread-based synchronization " ! "(SPARC only)"); ! ! PRODUCT_FLAG(bool, ReduceSignalUsage, false, JVMFlag::DEFAULT, ! "Reduce the use of OS signals in Java and/or the VM"); ! ! DEVELOP_FLAG(bool, LoadLineNumberTables, true, JVMFlag::DEFAULT, ! "Tell whether the class file parser loads line number tables"); ! ! DEVELOP_FLAG(bool, LoadLocalVariableTables, true, JVMFlag::DEFAULT, ! "Tell whether the class file parser loads local variable tables"); ! ! DEVELOP_FLAG(bool, LoadLocalVariableTypeTables, true, JVMFlag::DEFAULT, ! "Tell whether the class file parser loads local variable type" ! "tables"); ! ! PRODUCT_FLAG(bool, AllowUserSignalHandlers, false, JVMFlag::DEFAULT, ! "Do not complain if the application installs signal handlers " ! "(Solaris & Linux only)"); ! ! PRODUCT_FLAG(bool, UseSignalChaining, true, JVMFlag::DEFAULT, ! "Use signal-chaining to invoke signal handlers installed " ! "by the application (Solaris & Linux only)"); ! ! PRODUCT_FLAG(bool, RestoreMXCSROnJNICalls, false, JVMFlag::DEFAULT, ! "Restore MXCSR when returning from JNI calls"); ! ! PRODUCT_FLAG(bool, CheckJNICalls, false, JVMFlag::DEFAULT, ! "Verify all arguments to JNI calls"); ! ! PRODUCT_FLAG(bool, UseFastJNIAccessors, true, JVMFlag::DEFAULT, ! "Use optimized versions of Get<Primitive>Field"); ! ! PRODUCT_FLAG(intx, MaxJNILocalCapacity, 65536, JVMFlag::RANGE, ! "Maximum allowable local JNI handle capacity to " ! "EnsureLocalCapacity() and PushLocalFrame(), " ! "where <= 0 is unlimited, default: 65536"); ! FLAG_RANGE( MaxJNILocalCapacity, min_intx, max_intx); ! ! PRODUCT_FLAG(bool, EagerXrunInit, false, JVMFlag::DEFAULT, ! "Eagerly initialize -Xrun libraries; allows startup profiling, " ! "but not all -Xrun libraries may support the state of the VM " ! "at this time"); ! ! PRODUCT_FLAG(bool, PreserveAllAnnotations, false, JVMFlag::DEFAULT, ! "Preserve RuntimeInvisibleAnnotations as well " ! "as RuntimeVisibleAnnotations"); ! ! DEVELOP_FLAG(uintx, PreallocatedOutOfMemoryErrorCount, 4, JVMFlag::DEFAULT, ! "Number of OutOfMemoryErrors preallocated with backtrace"); ! ! PRODUCT_FLAG(bool, UseXMMForArrayCopy, false, JVMFlag::DEFAULT, ! "Use SSE2 MOVQ instruction for Arraycopy"); ! ! NOTPROD_FLAG(bool, PrintFieldLayout, false, JVMFlag::DEFAULT, ! "Print field layout for each class"); ! ! ! // Need to limit the extent of the padding to reasonable size. ! // 8K is well beyond the reasonable HW cache line size, even with ! // aggressive prefetching, while still leaving the room for segregating ! // among the distinct pages. ! PRODUCT_FLAG(intx, ContendedPaddingWidth, 128, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "How many bytes to pad the fields/classes marked @Contended with"); ! FLAG_RANGE( ContendedPaddingWidth, 0, 8192); ! FLAG_CONSTRAINT( ContendedPaddingWidth, (void*)ContendedPaddingWidthConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(bool, EnableContended, true, JVMFlag::DEFAULT, ! "Enable @Contended annotation support"); ! ! PRODUCT_FLAG(bool, RestrictContended, true, JVMFlag::DEFAULT, ! "Restrict @Contended to trusted classes"); ! ! PRODUCT_FLAG(bool, UseBiasedLocking, true, JVMFlag::DEFAULT, ! "Enable biased locking in JVM"); ! ! PRODUCT_FLAG(intx, BiasedLockingStartupDelay, 0, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Number of milliseconds to wait before enabling biased locking"); ! //TODO: to avoid circular dependency, the min/max cannot be declared in header file ! //FLAG_RANGE( BiasedLockingStartupDelay, 0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))); ! FLAG_CONSTRAINT( BiasedLockingStartupDelay, (void*)BiasedLockingStartupDelayFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(bool, PrintBiasedLockingStatistics, false, JVMFlag::DIAGNOSTIC, ! "Print statistics of biased locking in JVM"); ! ! PRODUCT_FLAG(intx, BiasedLockingBulkRebiasThreshold, 20, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Threshold of number of revocations per type to try to " ! "rebias all objects in the heap of that type"); ! FLAG_RANGE( BiasedLockingBulkRebiasThreshold, 0, max_intx); ! FLAG_CONSTRAINT( BiasedLockingBulkRebiasThreshold, (void*)BiasedLockingBulkRebiasThresholdFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(intx, BiasedLockingBulkRevokeThreshold, 40, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Threshold of number of revocations per type to permanently " ! "revoke biases of all objects in the heap of that type"); ! FLAG_RANGE( BiasedLockingBulkRevokeThreshold, 0, max_intx); ! FLAG_CONSTRAINT( BiasedLockingBulkRevokeThreshold, (void*)BiasedLockingBulkRevokeThresholdFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(intx, BiasedLockingDecayTime, 25000, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Decay time (in milliseconds) to re-enable bulk rebiasing of a " ! "type after previous bulk rebias"); ! FLAG_RANGE( BiasedLockingDecayTime, 500, max_intx); ! FLAG_CONSTRAINT( BiasedLockingDecayTime, (void*)BiasedLockingDecayTimeFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(bool, ExitOnOutOfMemoryError, false, JVMFlag::DEFAULT, ! "JVM exits on the first occurrence of an out-of-memory error"); ! ! PRODUCT_FLAG(bool, CrashOnOutOfMemoryError, false, JVMFlag::DEFAULT, ! "JVM aborts, producing an error log and core/mini dump, on the " ! "first occurrence of an out-of-memory error"); ! ! ! // tracing ! DEVELOP_FLAG(bool, StressRewriter, false, JVMFlag::DEFAULT, ! "Stress linktime bytecode rewriting"); ! ! PRODUCT_FLAG(ccstr, TraceJVMTI, NULL, JVMFlag::DEFAULT, ! "Trace flags for JVMTI functions and events"); ! ! ! // This option can change an EMCP method into an obsolete method. ! // This can affect tests that except specific methods to be EMCP. ! // This option should be used with caution. ! PRODUCT_FLAG(bool, StressLdcRewrite, false, JVMFlag::DEFAULT, ! "Force ldc -> ldc_w rewrite during RedefineClasses"); ! ! ! // change to false by default sometime after Mustang ! PRODUCT_FLAG(bool, VerifyMergedCPBytecodes, true, JVMFlag::DEFAULT, ! "Verify bytecodes after RedefineClasses constant pool merging"); ! ! PRODUCT_FLAG(bool, AllowRedefinitionToAddDeleteMethods, false, JVMFlag::DEFAULT, ! "(Deprecated) Allow redefinition to add and delete private " ! "static or final methods for compatibility with old releases"); ! ! DEVELOP_FLAG(bool, TraceBytecodes, false, JVMFlag::DEFAULT, ! "Trace bytecode execution"); ! ! DEVELOP_FLAG(bool, TraceICs, false, JVMFlag::DEFAULT, ! "Trace inline cache changes"); ! ! NOTPROD_FLAG(bool, TraceInvocationCounterOverflow, false, JVMFlag::DEFAULT, ! "Trace method invocation counter overflow"); ! ! DEVELOP_FLAG(bool, TraceInlineCacheClearing, false, JVMFlag::DEFAULT, ! "Trace clearing of inline caches in nmethods"); ! ! DEVELOP_FLAG(bool, TraceDependencies, false, JVMFlag::DEFAULT, ! "Trace dependencies"); ! ! DEVELOP_FLAG(bool, VerifyDependencies, trueInDebug, JVMFlag::DEFAULT, ! "Exercise and verify the compilation dependency mechanism"); ! ! DEVELOP_FLAG(bool, TraceNewOopMapGeneration, false, JVMFlag::DEFAULT, ! "Trace OopMapGeneration"); ! ! DEVELOP_FLAG(bool, TraceNewOopMapGenerationDetailed, false, JVMFlag::DEFAULT, ! "Trace OopMapGeneration: print detailed cell states"); ! ! DEVELOP_FLAG(bool, TimeOopMap, false, JVMFlag::DEFAULT, ! "Time calls to GenerateOopMap::compute_map() in sum"); ! ! DEVELOP_FLAG(bool, TimeOopMap2, false, JVMFlag::DEFAULT, ! "Time calls to GenerateOopMap::compute_map() individually"); ! ! DEVELOP_FLAG(bool, TraceOopMapRewrites, false, JVMFlag::DEFAULT, ! "Trace rewriting of method oops during oop map generation"); ! ! DEVELOP_FLAG(bool, TraceICBuffer, false, JVMFlag::DEFAULT, ! "Trace usage of IC buffer"); ! ! DEVELOP_FLAG(bool, TraceCompiledIC, false, JVMFlag::DEFAULT, ! "Trace changes of compiled IC"); ! ! DEVELOP_FLAG(bool, FLSVerifyDictionary, false, JVMFlag::DEFAULT, ! "Do lots of (expensive) FLS dictionary verification"); ! ! DEVELOP_FLAG(bool, CheckMemoryInitialization, false, JVMFlag::DEFAULT, ! "Check memory initialization"); ! PRODUCT_FLAG(uintx, ProcessDistributionStride, 4, JVMFlag::RANGE, ! "Stride through processors when distributing processes"); ! FLAG_RANGE( ProcessDistributionStride, 0, max_juint); ! ! DEVELOP_FLAG(bool, TraceFinalizerRegistration, false, JVMFlag::DEFAULT, ! "Trace registration of final references"); ! ! PRODUCT_FLAG(bool, IgnoreEmptyClassPaths, false, JVMFlag::DEFAULT, ! "Ignore empty path elements in -classpath"); ! ! PRODUCT_FLAG(size_t, InitialBootClassLoaderMetaspaceSize, NOT_LP64(2200*K) LP64_ONLY(4*M), JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Initial size of the boot class loader data metaspace"); ! FLAG_RANGE( InitialBootClassLoaderMetaspaceSize, 30*K, max_uintx/BytesPerWord); ! FLAG_CONSTRAINT( InitialBootClassLoaderMetaspaceSize, (void*)InitialBootClassLoaderMetaspaceSizeConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(bool, PrintHeapAtSIGBREAK, true, JVMFlag::DEFAULT, ! "Print heap layout in response to SIGBREAK"); ! ! PRODUCT_FLAG(bool, PrintClassHistogram, false, JVMFlag::MANAGEABLE, ! "Print a histogram of class instances"); ! ! PRODUCT_FLAG(double, ObjectCountCutOffPercent, 0.5, JVMFlag::EXPERIMENTAL | JVMFlag::RANGE, ! "The percentage of the used heap that the instances of a class " ! "must occupy for the class to generate a trace event"); ! FLAG_RANGE( ObjectCountCutOffPercent, 0.0, 100.0); ! ! ! // JVMTI heap profiling ! PRODUCT_FLAG(bool, TraceJVMTIObjectTagging, false, JVMFlag::DIAGNOSTIC, ! "Trace JVMTI object tagging calls"); ! ! PRODUCT_FLAG(bool, VerifyBeforeIteration, false, JVMFlag::DIAGNOSTIC, ! "Verify memory system before JVMTI iteration"); ! ! ! // compiler interface ! DEVELOP_FLAG(bool, CIPrintCompilerName, false, JVMFlag::DEFAULT, ! "when CIPrint is active, print the name of the active compiler"); ! ! PRODUCT_FLAG(bool, CIPrintCompileQueue, false, JVMFlag::DIAGNOSTIC, ! "display the contents of the compile queue whenever a " ! "compilation is enqueued"); ! ! DEVELOP_FLAG(bool, CIPrintRequests, false, JVMFlag::DEFAULT, ! "display every request for compilation"); ! ! PRODUCT_FLAG(bool, CITime, false, JVMFlag::DEFAULT, ! "collect timing information for compilation"); ! ! DEVELOP_FLAG(bool, CITimeVerbose, false, JVMFlag::DEFAULT, ! "be more verbose in compilation timings"); ! ! DEVELOP_FLAG(bool, CITimeEach, false, JVMFlag::DEFAULT, ! "display timing information after each successful compilation"); ! ! DEVELOP_FLAG(bool, CICountOSR, false, JVMFlag::DEFAULT, ! "use a separate counter when assigning ids to osr compilations"); ! ! DEVELOP_FLAG(bool, CICompileNatives, true, JVMFlag::DEFAULT, ! "compile native methods if supported by the compiler"); ! ! DEVELOP_FLAG_PD(bool, CICompileOSR, JVMFlag::DEFAULT, ! "compile on stack replacement methods if supported by the " ! "compiler"); ! ! DEVELOP_FLAG(bool, CIPrintMethodCodes, false, JVMFlag::DEFAULT, ! "print method bytecodes of the compiled code"); ! ! DEVELOP_FLAG(bool, CIPrintTypeFlow, false, JVMFlag::DEFAULT, ! "print the results of ciTypeFlow analysis"); ! ! DEVELOP_FLAG(bool, CITraceTypeFlow, false, JVMFlag::DEFAULT, ! "detailed per-bytecode tracing of ciTypeFlow analysis"); ! ! DEVELOP_FLAG(intx, OSROnlyBCI, -1, JVMFlag::DEFAULT, ! "OSR only at this bci. Negative values mean exclude that bci"); ! ! ! // compiler ! // notice: the max range value here is max_jint, not max_intx ! // because of overflow issue ! PRODUCT_FLAG(intx, CICompilerCount, CI_COMPILER_COUNT, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Number of compiler threads to run"); ! FLAG_RANGE( CICompilerCount, 0, max_jint); ! FLAG_CONSTRAINT( CICompilerCount, (void*)CICompilerCountConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(bool, UseDynamicNumberOfCompilerThreads, true, JVMFlag::DEFAULT, ! "Dynamically choose the number of parallel compiler threads"); ! ! PRODUCT_FLAG(bool, ReduceNumberOfCompilerThreads, true, JVMFlag::DIAGNOSTIC, ! "Reduce the number of parallel compiler threads when they " ! "are not used"); ! ! PRODUCT_FLAG(bool, TraceCompilerThreads, false, JVMFlag::DIAGNOSTIC, ! "Trace creation and removal of compiler threads"); ! ! DEVELOP_FLAG(bool, InjectCompilerCreationFailure, false, JVMFlag::DEFAULT, ! "Inject thread creation failures for " ! "UseDynamicNumberOfCompilerThreads"); ! ! DEVELOP_FLAG(bool, UseStackBanging, true, JVMFlag::DEFAULT, ! "use stack banging for stack overflow checks (required for " ! "proper StackOverflow handling; disable only to measure cost " ! "of stackbanging)"); ! ! DEVELOP_FLAG(bool, GenerateSynchronizationCode, true, JVMFlag::DEFAULT, ! "generate locking/unlocking code for synchronized methods and " ! "monitors"); ! ! DEVELOP_FLAG(bool, GenerateRangeChecks, true, JVMFlag::DEFAULT, ! "Generate range checks for array accesses"); ! ! PRODUCT_FLAG_PD(bool, ImplicitNullChecks, JVMFlag::DIAGNOSTIC, ! "Generate code for implicit null checks"); ! ! PRODUCT_FLAG_PD(bool, TrapBasedNullChecks, JVMFlag::DEFAULT, ! "Generate code for null checks that uses a cmp and trap " ! "instruction raising SIGTRAP. This is only used if an access to" ! "null (+offset) will not raise a SIGSEGV, i.e.," ! "ImplicitNullChecks don't work (PPC64)."); ! ! PRODUCT_FLAG(bool, EnableThreadSMRExtraValidityChecks, true, JVMFlag::DIAGNOSTIC, ! "Enable Thread SMR extra validity checks"); ! ! PRODUCT_FLAG(bool, EnableThreadSMRStatistics, trueInDebug, JVMFlag::DIAGNOSTIC, ! "Enable Thread SMR Statistics"); ! ! PRODUCT_FLAG(bool, UseNotificationThread, true, JVMFlag::DEFAULT, ! "Use Notification Thread"); ! ! PRODUCT_FLAG(bool, Inline, true, JVMFlag::DEFAULT, ! "Enable inlining"); ! ! PRODUCT_FLAG(bool, ClipInlining, true, JVMFlag::DEFAULT, ! "Clip inlining if aggregate method exceeds DesiredMethodLimit"); ! ! DEVELOP_FLAG(bool, UseCHA, true, JVMFlag::DEFAULT, ! "Enable CHA"); ! ! PRODUCT_FLAG(bool, UseTypeProfile, true, JVMFlag::DEFAULT, ! "Check interpreter profile for historically monomorphic calls"); ! ! PRODUCT_FLAG(bool, PrintInlining, false, JVMFlag::DIAGNOSTIC, ! "Print inlining optimizations"); ! ! PRODUCT_FLAG(bool, UsePopCountInstruction, false, JVMFlag::DEFAULT, ! "Use population count instruction"); ! ! DEVELOP_FLAG(bool, EagerInitialization, false, JVMFlag::DEFAULT, ! "Eagerly initialize classes if possible"); ! ! PRODUCT_FLAG(bool, LogTouchedMethods, false, JVMFlag::DIAGNOSTIC, ! "Log methods which have been ever touched in runtime"); ! ! PRODUCT_FLAG(bool, PrintTouchedMethodsAtExit, false, JVMFlag::DIAGNOSTIC, ! "Print all methods that have been ever touched in runtime"); ! ! DEVELOP_FLAG(bool, TraceMethodReplacement, false, JVMFlag::DEFAULT, ! "Print when methods are replaced do to recompilation"); ! ! DEVELOP_FLAG(bool, PrintMethodFlushing, false, JVMFlag::DEFAULT, ! "Print the nmethods being flushed"); ! ! PRODUCT_FLAG(bool, PrintMethodFlushingStatistics, false, JVMFlag::DIAGNOSTIC, ! "print statistics about method flushing"); ! ! PRODUCT_FLAG(intx, HotMethodDetectionLimit, 100000, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Number of compiled code invocations after which " ! "the method is considered as hot by the flusher"); ! FLAG_RANGE( HotMethodDetectionLimit, 1, max_jint); ! ! PRODUCT_FLAG(intx, MinPassesBeforeFlush, 10, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Minimum number of sweeper passes before an nmethod " ! "can be flushed"); ! FLAG_RANGE( MinPassesBeforeFlush, 0, max_intx); ! ! PRODUCT_FLAG(bool, UseCodeAging, true, JVMFlag::DEFAULT, ! "Insert counter to detect warm methods"); ! ! PRODUCT_FLAG(bool, StressCodeAging, false, JVMFlag::DIAGNOSTIC, ! "Start with counters compiled in"); ! ! DEVELOP_FLAG(bool, StressCodeBuffers, false, JVMFlag::DEFAULT, ! "Exercise code buffer expansion and other rare state changes"); ! ! PRODUCT_FLAG(bool, DebugNonSafepoints, trueInDebug, JVMFlag::DIAGNOSTIC, ! "Generate extra debugging information for non-safepoints in " ! "nmethods"); ! ! PRODUCT_FLAG(bool, PrintVMOptions, false, JVMFlag::DEFAULT, ! "Print flags that appeared on the command line"); ! ! PRODUCT_FLAG(bool, IgnoreUnrecognizedVMOptions, false, JVMFlag::DEFAULT, ! "Ignore unrecognized VM options"); ! ! PRODUCT_FLAG(bool, PrintCommandLineFlags, false, JVMFlag::DEFAULT, ! "Print flags specified on command line or set by ergonomics"); ! ! PRODUCT_FLAG(bool, PrintFlagsInitial, false, JVMFlag::DEFAULT, ! "Print all VM flags before argument processing and exit VM"); ! ! PRODUCT_FLAG(bool, PrintFlagsFinal, false, JVMFlag::DEFAULT, ! "Print all VM flags after argument and ergonomic processing"); ! ! NOTPROD_FLAG(bool, PrintFlagsWithComments, false, JVMFlag::DEFAULT, ! "Print all VM flags with default values and descriptions and " ! "exit"); ! ! PRODUCT_FLAG(bool, PrintFlagsRanges, false, JVMFlag::DEFAULT, ! "Print VM flags and their ranges"); ! ! PRODUCT_FLAG(bool, SerializeVMOutput, true, JVMFlag::DIAGNOSTIC, ! "Use a mutex to serialize output to tty and LogFile"); ! ! PRODUCT_FLAG(bool, DisplayVMOutput, true, JVMFlag::DIAGNOSTIC, ! "Display all VM output on the tty, independently of LogVMOutput"); ! ! PRODUCT_FLAG(bool, LogVMOutput, false, JVMFlag::DIAGNOSTIC, ! "Save VM output to LogFile"); ! ! PRODUCT_FLAG(ccstr, LogFile, NULL, JVMFlag::DIAGNOSTIC, ! "If LogVMOutput or LogCompilation is on, save VM output to " ! "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)"); ! ! PRODUCT_FLAG(ccstr, ErrorFile, NULL, JVMFlag::DEFAULT, ! "If an error occurs, save the error data to this file " ! "[default: ./hs_err_pid%p.log] (%p replaced with pid)"); ! ! PRODUCT_FLAG(bool, ExtensiveErrorReports, PRODUCT_ONLY(false) NOT_PRODUCT(true), JVMFlag::DEFAULT, ! "Error reports are more extensive."); ! ! PRODUCT_FLAG(bool, DisplayVMOutputToStderr, false, JVMFlag::DEFAULT, ! "If DisplayVMOutput is true, display all VM output to stderr"); ! ! PRODUCT_FLAG(bool, DisplayVMOutputToStdout, false, JVMFlag::DEFAULT, ! "If DisplayVMOutput is true, display all VM output to stdout"); ! ! PRODUCT_FLAG(bool, ErrorFileToStderr, false, JVMFlag::DEFAULT, ! "If true, error data is printed to stderr instead of a file"); ! ! PRODUCT_FLAG(bool, ErrorFileToStdout, false, JVMFlag::DEFAULT, ! "If true, error data is printed to stdout instead of a file"); ! ! PRODUCT_FLAG(bool, UseHeavyMonitors, false, JVMFlag::DEFAULT, ! "use heavyweight instead of lightweight Java monitors"); ! ! PRODUCT_FLAG(bool, PrintStringTableStatistics, false, JVMFlag::DEFAULT, ! "print statistics about the StringTable and SymbolTable"); ! ! PRODUCT_FLAG(bool, VerifyStringTableAtExit, false, JVMFlag::DIAGNOSTIC, ! "verify StringTable contents at exit"); ! ! NOTPROD_FLAG(bool, PrintSymbolTableSizeHistogram, false, JVMFlag::DEFAULT, ! "print histogram of the symbol table"); ! ! NOTPROD_FLAG(bool, ExitVMOnVerifyError, false, JVMFlag::DEFAULT, ! "standard exit from VM if bytecode verify error " ! "(only in debug mode)"); ! ! PRODUCT_FLAG(ccstr, AbortVMOnException, NULL, JVMFlag::DIAGNOSTIC, ! "Call fatal if this exception is thrown. Example: " ! "java -XX:AbortVMOnException=java.lang.NullPointerException Foo"); ! ! PRODUCT_FLAG(ccstr, AbortVMOnExceptionMessage, NULL, JVMFlag::DIAGNOSTIC, ! "Call fatal if the exception pointed by AbortVMOnException " ! "has this message"); ! ! DEVELOP_FLAG(bool, DebugVtables, false, JVMFlag::DEFAULT, ! "add debugging code to vtable dispatch"); ! ! NOTPROD_FLAG(bool, PrintVtableStats, false, JVMFlag::DEFAULT, ! "print vtables stats at end of run"); ! ! DEVELOP_FLAG(bool, TraceCreateZombies, false, JVMFlag::DEFAULT, ! "trace creation of zombie nmethods"); ! ! PRODUCT_FLAG(bool, RangeCheckElimination, true, JVMFlag::DEFAULT, ! "Eliminate range checks"); ! ! DEVELOP_FLAG_PD(bool, UncommonNullCast, JVMFlag::DEFAULT, ! "track occurrences of null in casts; adjust compiler tactics"); ! ! DEVELOP_FLAG(bool, TypeProfileCasts, true, JVMFlag::DEFAULT, ! "treat casts like calls for purposes of type profiling"); ! ! DEVELOP_FLAG(bool, TraceLivenessGen, false, JVMFlag::DEFAULT, ! "Trace the generation of liveness analysis information"); ! ! NOTPROD_FLAG(bool, TraceLivenessQuery, false, JVMFlag::DEFAULT, ! "Trace queries of liveness analysis information"); ! ! NOTPROD_FLAG(bool, CollectIndexSetStatistics, false, JVMFlag::DEFAULT, ! "Collect information about IndexSets"); ! ! DEVELOP_FLAG(bool, UseLoopSafepoints, true, JVMFlag::DEFAULT, ! "Generate Safepoint nodes in every loop"); ! ! DEVELOP_FLAG(intx, FastAllocateSizeLimit, 128*K, JVMFlag::DEFAULT, ! /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ ! "Inline allocations larger than this in doublewords must go slow"); ! ! ! // Note: This value is zero mod 1<<13 for a cheap sparc set. ! PRODUCT_FLAG_PD(bool, CompactStrings, JVMFlag::DEFAULT, ! "Enable Strings to use single byte chars in backing store"); ! ! PRODUCT_FLAG_PD(uintx, TypeProfileLevel, JVMFlag::CONSTRAINT, ! "=XYZ, with Z: Type profiling of arguments at call; " ! "Y: Type profiling of return value at call; " ! "X: Type profiling of parameters to methods; " ! "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods"); ! FLAG_CONSTRAINT( TypeProfileLevel, (void*)TypeProfileLevelConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(intx, TypeProfileArgsLimit, 2, JVMFlag::RANGE, ! "max number of call arguments to consider for type profiling"); ! FLAG_RANGE( TypeProfileArgsLimit, 0, 16); ! ! PRODUCT_FLAG(intx, TypeProfileParmsLimit, 2, JVMFlag::RANGE, ! "max number of incoming parameters to consider for type profiling" ! ", -1 for all"); ! FLAG_RANGE( TypeProfileParmsLimit, -1, 64); ! ! ! // statistics ! DEVELOP_FLAG(bool, CountCompiledCalls, false, JVMFlag::DEFAULT, ! "Count method invocations"); ! ! NOTPROD_FLAG(bool, CountRuntimeCalls, false, JVMFlag::DEFAULT, ! "Count VM runtime calls"); ! ! DEVELOP_FLAG(bool, CountJNICalls, false, JVMFlag::DEFAULT, ! "Count jni method invocations"); ! ! NOTPROD_FLAG(bool, CountJVMCalls, false, JVMFlag::DEFAULT, ! "Count jvm method invocations"); ! ! NOTPROD_FLAG(bool, CountRemovableExceptions, false, JVMFlag::DEFAULT, ! "Count exceptions that could be replaced by branches due to " ! "inlining"); ! ! NOTPROD_FLAG(bool, ICMissHistogram, false, JVMFlag::DEFAULT, ! "Produce histogram of IC misses"); ! ! ! // interpreter ! PRODUCT_FLAG_PD(bool, RewriteBytecodes, JVMFlag::DEFAULT, ! "Allow rewriting of bytecodes (bytecodes are not immutable)"); ! ! PRODUCT_FLAG_PD(bool, RewriteFrequentPairs, JVMFlag::DEFAULT, ! "Rewrite frequently used bytecode pairs into a single bytecode"); ! ! PRODUCT_FLAG(bool, PrintInterpreter, false, JVMFlag::DIAGNOSTIC, ! "Print the generated interpreter code"); ! ! PRODUCT_FLAG(bool, UseInterpreter, true, JVMFlag::DEFAULT, ! "Use interpreter for non-compiled methods"); ! ! DEVELOP_FLAG(bool, UseFastSignatureHandlers, true, JVMFlag::DEFAULT, ! "Use fast signature handlers for native calls"); ! ! PRODUCT_FLAG(bool, UseLoopCounter, true, JVMFlag::DEFAULT, ! "Increment invocation counter on backward branch"); ! ! PRODUCT_FLAG_PD(bool, UseOnStackReplacement, JVMFlag::DEFAULT, ! "Use on stack replacement, calls runtime if invoc. counter " ! "overflows in loop"); ! ! NOTPROD_FLAG(bool, TraceOnStackReplacement, false, JVMFlag::DEFAULT, ! "Trace on stack replacement"); ! ! PRODUCT_FLAG_PD(bool, PreferInterpreterNativeStubs, JVMFlag::DEFAULT, ! "Use always interpreter stubs for native methods invoked via " ! "interpreter"); ! ! DEVELOP_FLAG(bool, CountBytecodes, false, JVMFlag::DEFAULT, ! "Count number of bytecodes executed"); ! ! DEVELOP_FLAG(bool, PrintBytecodeHistogram, false, JVMFlag::DEFAULT, ! "Print histogram of the executed bytecodes"); ! ! DEVELOP_FLAG(bool, PrintBytecodePairHistogram, false, JVMFlag::DEFAULT, ! "Print histogram of the executed bytecode pairs"); ! ! PRODUCT_FLAG(bool, PrintSignatureHandlers, false, JVMFlag::DIAGNOSTIC, ! "Print code generated for native method signature handlers"); ! ! DEVELOP_FLAG(bool, VerifyOops, false, JVMFlag::DEFAULT, ! "Do plausibility checks for oops"); ! ! DEVELOP_FLAG(bool, CheckUnhandledOops, false, JVMFlag::DEFAULT, ! "Check for unhandled oops in VM code"); ! ! DEVELOP_FLAG(bool, VerifyJNIFields, trueInDebug, JVMFlag::DEFAULT, ! "Verify jfieldIDs for instance fields"); ! ! NOTPROD_FLAG(bool, VerifyJNIEnvThread, false, JVMFlag::DEFAULT, ! "Verify JNIEnv.thread == Thread::current() when entering VM " ! "from JNI"); ! ! DEVELOP_FLAG(bool, VerifyFPU, false, JVMFlag::DEFAULT, ! "Verify FPU state (check for NaN's, etc.)"); ! ! DEVELOP_FLAG(bool, VerifyThread, false, JVMFlag::DEFAULT, ! "Watch the thread register for corruption (SPARC only)"); ! ! DEVELOP_FLAG(bool, VerifyActivationFrameSize, false, JVMFlag::DEFAULT, ! "Verify that activation frame didn't become smaller than its " ! "minimal size"); ! ! DEVELOP_FLAG(bool, TraceFrequencyInlining, false, JVMFlag::DEFAULT, ! "Trace frequency based inlining"); ! ! DEVELOP_FLAG_PD(bool, InlineIntrinsics, JVMFlag::DEFAULT, ! "Inline intrinsics that can be statically resolved"); ! ! PRODUCT_FLAG_PD(bool, ProfileInterpreter, JVMFlag::DEFAULT, ! "Profile at the bytecode level during interpretation"); ! ! DEVELOP_FLAG(bool, TraceProfileInterpreter, false, JVMFlag::DEFAULT, ! "Trace profiling at the bytecode level during interpretation. " ! "This outputs the profiling information collected to improve " ! "jit compilation."); ! ! DEVELOP_FLAG_PD(bool, ProfileTraps, JVMFlag::DEFAULT, ! "Profile deoptimization traps at the bytecode level"); ! ! PRODUCT_FLAG(intx, ProfileMaturityPercentage, 20, JVMFlag::RANGE, ! "number of method invocations/branches (expressed as % of " ! "CompileThreshold) before using the method's profile"); ! FLAG_RANGE( ProfileMaturityPercentage, 0, 100); ! ! PRODUCT_FLAG(bool, PrintMethodData, false, JVMFlag::DIAGNOSTIC, ! "Print the results of +ProfileInterpreter at end of run"); ! ! DEVELOP_FLAG(bool, VerifyDataPointer, trueInDebug, JVMFlag::DEFAULT, ! "Verify the method data pointer during interpreter profiling"); ! ! DEVELOP_FLAG(bool, VerifyCompiledCode, false, JVMFlag::DEFAULT, ! "Include miscellaneous runtime verifications in nmethod code; " ! "default off because it disturbs nmethod size heuristics"); ! ! NOTPROD_FLAG(bool, CrashGCForDumpingJavaThread, false, JVMFlag::DEFAULT, ! "Manually make GC thread crash then dump java stack trace; " ! "Test only"); ! ! ! // compilation ! PRODUCT_FLAG(bool, UseCompiler, true, JVMFlag::DEFAULT, ! "Use Just-In-Time compilation"); ! ! PRODUCT_FLAG(bool, UseCounterDecay, true, JVMFlag::DEFAULT, ! "Adjust recompilation counters"); ! ! DEVELOP_FLAG(intx, CounterHalfLifeTime, 30, JVMFlag::DEFAULT, ! "Half-life time of invocation counters (in seconds)"); ! ! DEVELOP_FLAG(intx, CounterDecayMinIntervalLength, 500, JVMFlag::DEFAULT, ! "The minimum interval (in milliseconds) between invocation of " ! "CounterDecay"); ! ! PRODUCT_FLAG(bool, AlwaysCompileLoopMethods, false, JVMFlag::DEFAULT, ! "When using recompilation, never interpret methods " ! "containing loops"); ! ! PRODUCT_FLAG(bool, DontCompileHugeMethods, true, JVMFlag::DEFAULT, ! "Do not compile methods > HugeMethodLimit"); ! ! ! // Bytecode escape analysis estimation. ! PRODUCT_FLAG(bool, EstimateArgEscape, true, JVMFlag::DEFAULT, ! "Analyze bytecodes to estimate escape state of arguments"); ! ! PRODUCT_FLAG(intx, BCEATraceLevel, 0, JVMFlag::RANGE, ! "How much tracing to do of bytecode escape analysis estimates " ! "(0-3)"); ! FLAG_RANGE( BCEATraceLevel, 0, 3); ! ! PRODUCT_FLAG(intx, MaxBCEAEstimateLevel, 5, JVMFlag::RANGE, ! "Maximum number of nested calls that are analyzed by BC EA"); ! FLAG_RANGE( MaxBCEAEstimateLevel, 0, max_jint); ! ! PRODUCT_FLAG(intx, MaxBCEAEstimateSize, 150, JVMFlag::RANGE, ! "Maximum bytecode size of a method to be analyzed by BC EA"); ! FLAG_RANGE( MaxBCEAEstimateSize, 0, max_jint); ! ! PRODUCT_FLAG(intx, AllocatePrefetchStyle, 1, JVMFlag::RANGE, ! "0 = no prefetch, " ! "1 = generate prefetch instructions for each allocation, " ! "2 = use TLAB watermark to gate allocation prefetch, " ! "3 = generate one prefetch instruction per cache line"); ! FLAG_RANGE( AllocatePrefetchStyle, 0, 3); ! ! PRODUCT_FLAG(intx, AllocatePrefetchDistance, -1, JVMFlag::CONSTRAINT, ! "Distance to prefetch ahead of allocation pointer. " ! "-1: use system-specific value (automatically determined"); ! FLAG_CONSTRAINT( AllocatePrefetchDistance, (void*)AllocatePrefetchDistanceConstraintFunc, JVMFlag::AfterMemoryInit); ! ! PRODUCT_FLAG(intx, AllocatePrefetchLines, 3, JVMFlag::RANGE, ! "Number of lines to prefetch ahead of array allocation pointer"); ! FLAG_RANGE( AllocatePrefetchLines, 1, 64); ! ! PRODUCT_FLAG(intx, AllocateInstancePrefetchLines, 1, JVMFlag::RANGE, ! "Number of lines to prefetch ahead of instance allocation " ! "pointer"); ! FLAG_RANGE( AllocateInstancePrefetchLines, 1, 64); ! ! PRODUCT_FLAG(intx, AllocatePrefetchStepSize, 16, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Step size in bytes of sequential prefetch instructions"); ! FLAG_RANGE( AllocatePrefetchStepSize, 1, 512); ! FLAG_CONSTRAINT( AllocatePrefetchStepSize, (void*)AllocatePrefetchStepSizeConstraintFunc, JVMFlag::AfterMemoryInit); ! ! PRODUCT_FLAG(intx, AllocatePrefetchInstr, 0, JVMFlag::CONSTRAINT, ! "Select instruction to prefetch ahead of allocation pointer"); ! FLAG_CONSTRAINT( AllocatePrefetchInstr, (void*)AllocatePrefetchInstrConstraintFunc, JVMFlag::AfterMemoryInit); ! ! ! // deoptimization ! DEVELOP_FLAG(bool, TraceDeoptimization, false, JVMFlag::DEFAULT, ! "Trace deoptimization"); ! ! DEVELOP_FLAG(bool, PrintDeoptimizationDetails, false, JVMFlag::DEFAULT, ! "Print more information about deoptimization"); ! ! DEVELOP_FLAG(bool, DebugDeoptimization, false, JVMFlag::DEFAULT, ! "Tracing various information while debugging deoptimization"); ! ! PRODUCT_FLAG(intx, SelfDestructTimer, 0, JVMFlag::RANGE, ! "Will cause VM to terminate after a given time (in minutes) " ! "(0 means off)"); ! FLAG_RANGE( SelfDestructTimer, 0, max_intx); ! ! PRODUCT_FLAG(intx, MaxJavaStackTraceDepth, 1024, JVMFlag::RANGE, ! "The maximum number of lines in the stack trace for Java " ! "exceptions (0 means all)"); ! FLAG_RANGE( MaxJavaStackTraceDepth, 0, max_jint/2); ! ! ! // notice: the max range value here is max_jint, not max_intx ! // because of overflow issue ! PRODUCT_FLAG(intx, GuaranteedSafepointInterval, 1000, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Guarantee a safepoint (at least) every so many milliseconds " ! "(0 means none)"); ! FLAG_RANGE( GuaranteedSafepointInterval, 0, max_jint); ! ! PRODUCT_FLAG(intx, SafepointTimeoutDelay, 10000, JVMFlag::RANGE, ! "Delay in milliseconds for option SafepointTimeout"); ! FLAG_RANGE( SafepointTimeoutDelay, 0, max_intx LP64_ONLY(/MICROUNITS)); ! ! PRODUCT_FLAG(intx, NmethodSweepActivity, 10, JVMFlag::RANGE, ! "Removes cold nmethods from code cache if > 0. Higher values " ! "result in more aggressive sweeping"); ! FLAG_RANGE( NmethodSweepActivity, 0, 2000); ! ! NOTPROD_FLAG(bool, LogSweeper, false, JVMFlag::DEFAULT, ! "Keep a ring buffer of sweeper activity"); ! ! NOTPROD_FLAG(intx, SweeperLogEntries, 1024, JVMFlag::DEFAULT, ! "Number of records in the ring buffer of sweeper activity"); ! ! NOTPROD_FLAG(intx, MemProfilingInterval, 500, JVMFlag::DEFAULT, ! "Time between each invocation of the MemProfiler"); ! ! DEVELOP_FLAG(intx, MallocCatchPtr, -1, JVMFlag::DEFAULT, ! "Hit breakpoint when mallocing/freeing this pointer"); ! ! NOTPROD_FLAG(ccstr, SuppressErrorAt, "", JVMFlag::STRINGLIST, ! "List of assertions (file:line) to muzzle"); ! ! DEVELOP_FLAG(intx, StackPrintLimit, 100, JVMFlag::DEFAULT, ! "number of stack frames to print in VM-level stack dump"); ! ! NOTPROD_FLAG(intx, MaxElementPrintSize, 256, JVMFlag::DEFAULT, ! "maximum number of elements to print"); ! ! NOTPROD_FLAG(intx, MaxSubklassPrintSize, 4, JVMFlag::DEFAULT, ! "maximum number of subklasses to print when printing klass"); ! ! PRODUCT_FLAG(intx, MaxInlineLevel, 15, JVMFlag::RANGE, ! "maximum number of nested calls that are inlined"); ! FLAG_RANGE( MaxInlineLevel, 0, max_jint); ! ! PRODUCT_FLAG(intx, MaxRecursiveInlineLevel, 1, JVMFlag::RANGE, ! "maximum number of nested recursive calls that are inlined"); ! FLAG_RANGE( MaxRecursiveInlineLevel, 0, max_jint); ! ! DEVELOP_FLAG(intx, MaxForceInlineLevel, 100, JVMFlag::RANGE, ! "maximum number of nested calls that are forced for inlining " ! "(using CompileCommand or marked w/ @ForceInline)"); ! FLAG_RANGE( MaxForceInlineLevel, 0, max_jint); ! ! PRODUCT_FLAG_PD(intx, InlineSmallCode, JVMFlag::RANGE, ! "Only inline already compiled methods if their code size is " ! "less than this"); ! FLAG_RANGE( InlineSmallCode, 0, max_jint); ! ! PRODUCT_FLAG(intx, MaxInlineSize, 35, JVMFlag::RANGE, ! "The maximum bytecode size of a method to be inlined"); ! FLAG_RANGE( MaxInlineSize, 0, max_jint); ! ! PRODUCT_FLAG_PD(intx, FreqInlineSize, JVMFlag::RANGE, ! "The maximum bytecode size of a frequent method to be inlined"); ! FLAG_RANGE( FreqInlineSize, 0, max_jint); ! ! PRODUCT_FLAG(intx, MaxTrivialSize, 6, JVMFlag::RANGE, ! "The maximum bytecode size of a trivial method to be inlined"); ! FLAG_RANGE( MaxTrivialSize, 0, max_jint); ! ! PRODUCT_FLAG(intx, MinInliningThreshold, 250, JVMFlag::RANGE, ! "The minimum invocation count a method needs to have to be " ! "inlined"); ! FLAG_RANGE( MinInliningThreshold, 0, max_jint); ! ! DEVELOP_FLAG(intx, MethodHistogramCutoff, 100, JVMFlag::DEFAULT, ! "The cutoff value for method invocation histogram (+CountCalls)"); ! ! DEVELOP_FLAG(intx, DontYieldALotInterval, 10, JVMFlag::DEFAULT, ! "Interval between which yields will be dropped (milliseconds)"); ! ! NOTPROD_FLAG(intx, DeoptimizeALotInterval, 5, JVMFlag::DEFAULT, ! "Number of exits until DeoptimizeALot kicks in"); ! ! NOTPROD_FLAG(intx, ZombieALotInterval, 5, JVMFlag::DEFAULT, ! "Number of exits until ZombieALot kicks in"); ! ! PRODUCT_FLAG(uintx, MallocMaxTestWords, 0, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "If non-zero, maximum number of words that malloc/realloc can " ! "allocate (for testing only)"); ! FLAG_RANGE( MallocMaxTestWords, 0, max_uintx); ! ! PRODUCT_FLAG(intx, TypeProfileWidth, 2, JVMFlag::RANGE, ! "Number of receiver types to record in call/cast profile"); ! FLAG_RANGE( TypeProfileWidth, 0, 8); ! ! DEVELOP_FLAG(intx, BciProfileWidth, 2, JVMFlag::DEFAULT, ! "Number of return bci's to record in ret profile"); ! ! PRODUCT_FLAG(intx, PerMethodRecompilationCutoff, 400, JVMFlag::RANGE, ! "After recompiling N times, stay in the interpreter (-1=>'Inf')"); ! FLAG_RANGE( PerMethodRecompilationCutoff, -1, max_intx); ! ! PRODUCT_FLAG(intx, PerBytecodeRecompilationCutoff, 200, JVMFlag::RANGE, ! "Per-BCI limit on repeated recompilation (-1=>'Inf')"); ! FLAG_RANGE( PerBytecodeRecompilationCutoff, -1, max_intx); ! ! PRODUCT_FLAG(intx, PerMethodTrapLimit, 100, JVMFlag::RANGE, ! "Limit on traps (of one kind) in a method (includes inlines)"); ! FLAG_RANGE( PerMethodTrapLimit, 0, max_jint); ! ! PRODUCT_FLAG(intx, PerMethodSpecTrapLimit, 5000, JVMFlag::EXPERIMENTAL | JVMFlag::RANGE, ! "Limit on speculative traps (of one kind) in a method " ! "(includes inlines)"); ! FLAG_RANGE( PerMethodSpecTrapLimit, 0, max_jint); ! ! PRODUCT_FLAG(intx, PerBytecodeTrapLimit, 4, JVMFlag::RANGE, ! "Limit on traps (of one kind) at a particular BCI"); ! FLAG_RANGE( PerBytecodeTrapLimit, 0, max_jint); ! ! PRODUCT_FLAG(intx, SpecTrapLimitExtraEntries, 3, JVMFlag::EXPERIMENTAL, ! "Extra method data trap entries for speculation"); ! ! DEVELOP_FLAG(intx, InlineFrequencyRatio, 20, JVMFlag::RANGE, ! "Ratio of call site execution to caller method invocation"); ! FLAG_RANGE( InlineFrequencyRatio, 0, max_jint); ! ! PRODUCT_FLAG_PD(intx, InlineFrequencyCount, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Count of call site execution necessary to trigger frequent " ! "inlining"); ! FLAG_RANGE( InlineFrequencyCount, 0, max_jint); ! ! DEVELOP_FLAG(intx, InlineThrowCount, 50, JVMFlag::RANGE, ! "Force inlining of interpreted methods that throw this often"); ! FLAG_RANGE( InlineThrowCount, 0, max_jint); ! ! DEVELOP_FLAG(intx, InlineThrowMaxSize, 200, JVMFlag::RANGE, ! "Force inlining of throwing methods smaller than this"); ! FLAG_RANGE( InlineThrowMaxSize, 0, max_jint); ! ! DEVELOP_FLAG(intx, ProfilerNodeSize, 1024, JVMFlag::RANGE, ! "Size in K to allocate for the Profile Nodes of each thread"); ! FLAG_RANGE( ProfilerNodeSize, 0, 1024); ! ! PRODUCT_FLAG_PD(size_t, MetaspaceSize, JVMFlag::CONSTRAINT, ! "Initial threshold (in bytes) at which a garbage collection " ! "is done to reduce Metaspace usage"); ! FLAG_CONSTRAINT( MetaspaceSize, (void*)MetaspaceSizeConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(size_t, MaxMetaspaceSize, max_uintx, JVMFlag::CONSTRAINT, ! "Maximum size of Metaspaces (in bytes)"); ! FLAG_CONSTRAINT( MaxMetaspaceSize, (void*)MaxMetaspaceSizeConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(size_t, CompressedClassSpaceSize, 1*G, JVMFlag::RANGE, ! "Maximum size of class area in Metaspace when compressed " ! "class pointers are used"); ! FLAG_RANGE( CompressedClassSpaceSize, 1*M, 3*G); ! ! PRODUCT_FLAG(uintx, MinHeapFreeRatio, 40, JVMFlag::MANAGEABLE | JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "The minimum percentage of heap free after GC to avoid expansion." ! " For most GCs this applies to the old generation. In G1 and" ! " ParallelGC it applies to the whole heap."); ! FLAG_RANGE( MinHeapFreeRatio, 0, 100); ! FLAG_CONSTRAINT( MinHeapFreeRatio, (void*)MinHeapFreeRatioConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(uintx, MaxHeapFreeRatio, 70, JVMFlag::MANAGEABLE | JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "The maximum percentage of heap free after GC to avoid shrinking." ! " For most GCs this applies to the old generation. In G1 and" ! " ParallelGC it applies to the whole heap."); ! FLAG_RANGE( MaxHeapFreeRatio, 0, 100); ! FLAG_CONSTRAINT( MaxHeapFreeRatio, (void*)MaxHeapFreeRatioConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(bool, ShrinkHeapInSteps, true, JVMFlag::DEFAULT, ! "When disabled, informs the GC to shrink the java heap directly" ! " to the target size at the next full GC rather than requiring" ! " smaller steps during multiple full GCs."); ! ! PRODUCT_FLAG(intx, SoftRefLRUPolicyMSPerMB, 1000, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Number of milliseconds per MB of free space in the heap"); ! FLAG_RANGE( SoftRefLRUPolicyMSPerMB, 0, max_intx); ! FLAG_CONSTRAINT( SoftRefLRUPolicyMSPerMB, (void*)SoftRefLRUPolicyMSPerMBConstraintFunc, JVMFlag::AfterMemoryInit); ! ! PRODUCT_FLAG(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), JVMFlag::RANGE, ! "The minimum change in heap space due to GC (in bytes)"); ! FLAG_RANGE( MinHeapDeltaBytes, 0, max_uintx); ! ! PRODUCT_FLAG(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), JVMFlag::RANGE, ! "The minimum expansion of Metaspace (in bytes)"); ! FLAG_RANGE( MinMetaspaceExpansion, 0, max_uintx); ! ! PRODUCT_FLAG(uintx, MaxMetaspaceFreeRatio, 70, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "The maximum percentage of Metaspace free after GC to avoid " ! "shrinking"); ! FLAG_RANGE( MaxMetaspaceFreeRatio, 0, 100); ! FLAG_CONSTRAINT( MaxMetaspaceFreeRatio, (void*)MaxMetaspaceFreeRatioConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(uintx, MinMetaspaceFreeRatio, 40, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "The minimum percentage of Metaspace free after GC to avoid " ! "expansion"); ! FLAG_RANGE( MinMetaspaceFreeRatio, 0, 99); ! FLAG_CONSTRAINT( MinMetaspaceFreeRatio, (void*)MinMetaspaceFreeRatioConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), JVMFlag::RANGE, ! "The maximum expansion of Metaspace without full GC (in bytes)"); ! FLAG_RANGE( MaxMetaspaceExpansion, 0, max_uintx); ! ! ! // stack parameters ! PRODUCT_FLAG_PD(intx, StackYellowPages, JVMFlag::RANGE, ! "Number of yellow zone (recoverable overflows) pages of size " ! "4KB. If pages are bigger yellow zone is aligned up."); ! FLAG_RANGE( StackYellowPages, MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)); ! ! PRODUCT_FLAG_PD(intx, StackRedPages, JVMFlag::RANGE, ! "Number of red zone (unrecoverable overflows) pages of size " ! "4KB. If pages are bigger red zone is aligned up."); ! FLAG_RANGE( StackRedPages, MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)); ! ! PRODUCT_FLAG_PD(intx, StackReservedPages, JVMFlag::RANGE, ! "Number of reserved zone (reserved to annotated methods) pages" ! " of size 4KB. If pages are bigger reserved zone is aligned up."); ! FLAG_RANGE( StackReservedPages, MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10)); ! ! PRODUCT_FLAG(bool, RestrictReservedStack, true, JVMFlag::DEFAULT, ! "Restrict @ReservedStackAccess to trusted classes"); ! ! ! // greater stack shadow pages can't generate instruction to bang stack ! PRODUCT_FLAG_PD(intx, StackShadowPages, JVMFlag::RANGE, ! "Number of shadow zone (for overflow checking) pages of size " ! "4KB. If pages are bigger shadow zone is aligned up. " ! "This should exceed the depth of the VM and native call stack."); ! FLAG_RANGE( StackShadowPages, MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)); ! ! PRODUCT_FLAG_PD(intx, ThreadStackSize, JVMFlag::RANGE, ! "Thread Stack Size (in Kbytes)"); ! FLAG_RANGE( ThreadStackSize, 0, 1 * M); ! ! PRODUCT_FLAG_PD(intx, VMThreadStackSize, JVMFlag::RANGE, ! "Non-Java Thread Stack Size (in Kbytes)"); ! FLAG_RANGE( VMThreadStackSize, 0, max_intx/(1 * K)); ! ! PRODUCT_FLAG_PD(intx, CompilerThreadStackSize, JVMFlag::RANGE, ! "Compiler Thread Stack Size (in Kbytes)"); ! FLAG_RANGE( CompilerThreadStackSize, 0, max_intx/(1 * K)); ! ! DEVELOP_FLAG_PD(size_t, JVMInvokeMethodSlack, JVMFlag::DEFAULT, ! "Stack space (bytes) required for JVM_InvokeMethod to complete"); ! ! ! // code cache parameters ! DEVELOP_FLAG_PD(uintx, CodeCacheSegmentSize, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Code cache segment size (in bytes) - smallest unit of " ! "allocation"); ! FLAG_RANGE( CodeCacheSegmentSize, 1, 1024); ! FLAG_CONSTRAINT( CodeCacheSegmentSize, (void*)CodeCacheSegmentSizeConstraintFunc, JVMFlag::AfterErgo); ! ! DEVELOP_FLAG_PD(intx, CodeEntryAlignment, JVMFlag::CONSTRAINT, ! "Code entry alignment for generated code (in bytes)"); ! FLAG_CONSTRAINT( CodeEntryAlignment, (void*)CodeEntryAlignmentConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG_PD(intx, OptoLoopAlignment, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Align inner loops to zero relative to this modulus"); ! FLAG_RANGE( OptoLoopAlignment, 1, 16); ! FLAG_CONSTRAINT( OptoLoopAlignment, (void*)OptoLoopAlignmentConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG_PD(uintx, InitialCodeCacheSize, JVMFlag::RANGE, ! "Initial code cache size (in bytes)"); ! FLAG_CUSTOM_RANGE( InitialCodeCacheSize, VMPageSize); ! ! DEVELOP_FLAG_PD(uintx, CodeCacheMinimumUseSpace, JVMFlag::RANGE, ! "Minimum code cache size (in bytes) required to start VM."); ! FLAG_RANGE( CodeCacheMinimumUseSpace, 0, max_uintx); ! ! PRODUCT_FLAG(bool, SegmentedCodeCache, false, JVMFlag::DEFAULT, ! "Use a segmented code cache"); ! ! PRODUCT_FLAG_PD(uintx, ReservedCodeCacheSize, JVMFlag::RANGE, ! "Reserved code cache size (in bytes) - maximum code cache size"); ! FLAG_CUSTOM_RANGE( ReservedCodeCacheSize, VMPageSize); ! ! PRODUCT_FLAG_PD(uintx, NonProfiledCodeHeapSize, JVMFlag::RANGE, ! "Size of code heap with non-profiled methods (in bytes)"); ! FLAG_RANGE( NonProfiledCodeHeapSize, 0, max_uintx); ! ! PRODUCT_FLAG_PD(uintx, ProfiledCodeHeapSize, JVMFlag::RANGE, ! "Size of code heap with profiled methods (in bytes)"); ! FLAG_RANGE( ProfiledCodeHeapSize, 0, max_uintx); ! ! PRODUCT_FLAG_PD(uintx, NonNMethodCodeHeapSize, JVMFlag::RANGE, ! "Size of code heap with non-nmethods (in bytes)"); ! FLAG_CUSTOM_RANGE( NonNMethodCodeHeapSize, VMPageSize); ! ! PRODUCT_FLAG_PD(uintx, CodeCacheExpansionSize, JVMFlag::RANGE, ! "Code cache expansion size (in bytes)"); ! FLAG_RANGE( CodeCacheExpansionSize, 32*K, max_uintx); ! ! PRODUCT_FLAG_PD(uintx, CodeCacheMinBlockLength, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Minimum number of segments in a code cache block"); ! FLAG_RANGE( CodeCacheMinBlockLength, 1, 100); ! ! NOTPROD_FLAG(bool, ExitOnFullCodeCache, false, JVMFlag::DEFAULT, ! "Exit the VM if we fill the code cache"); ! ! PRODUCT_FLAG(bool, UseCodeCacheFlushing, true, JVMFlag::DEFAULT, ! "Remove cold/old nmethods from the code cache"); ! ! PRODUCT_FLAG(uintx, StartAggressiveSweepingAt, 10, JVMFlag::RANGE, ! "Start aggressive sweeping if X[%] of the code cache is free." ! "Segmented code cache: X[%] of the non-profiled heap." ! "Non-segmented code cache: X[%] of the total code cache"); ! FLAG_RANGE( StartAggressiveSweepingAt, 0, 100); ! ! ! // AOT parameters ! PRODUCT_FLAG(bool, UseAOT, false, JVMFlag::EXPERIMENTAL, ! "Use AOT compiled files"); ! ! PRODUCT_FLAG(ccstr, AOTLibrary, NULL, JVMFlag::EXPERIMENTAL | JVMFlag::STRINGLIST, ! "AOT library"); ! ! PRODUCT_FLAG(bool, PrintAOT, false, JVMFlag::EXPERIMENTAL, ! "Print used AOT klasses and methods"); ! ! NOTPROD_FLAG(bool, PrintAOTStatistics, false, JVMFlag::DEFAULT, ! "Print AOT statistics"); ! ! PRODUCT_FLAG(bool, UseAOTStrictLoading, false, JVMFlag::DIAGNOSTIC, ! "Exit the VM if any of the AOT libraries has invalid config"); ! ! PRODUCT_FLAG(bool, CalculateClassFingerprint, false, JVMFlag::DEFAULT, ! "Calculate class fingerprint"); ! ! ! // interpreter debugging ! DEVELOP_FLAG(intx, BinarySwitchThreshold, 5, JVMFlag::DEFAULT, ! "Minimal number of lookupswitch entries for rewriting to binary " ! "switch"); ! ! DEVELOP_FLAG(intx, StopInterpreterAt, 0, JVMFlag::DEFAULT, ! "Stop interpreter execution at specified bytecode number"); ! ! DEVELOP_FLAG(intx, TraceBytecodesAt, 0, JVMFlag::DEFAULT, ! "Trace bytecodes starting with specified bytecode number"); ! ! ! // compiler interface ! DEVELOP_FLAG(intx, CIStart, 0, JVMFlag::DEFAULT, ! "The id of the first compilation to permit"); ! ! DEVELOP_FLAG(intx, CIStop, max_jint, JVMFlag::DEFAULT, ! "The id of the last compilation to permit"); ! ! DEVELOP_FLAG(intx, CIStartOSR, 0, JVMFlag::DEFAULT, ! "The id of the first osr compilation to permit " ! "(CICountOSR must be on)"); ! ! DEVELOP_FLAG(intx, CIStopOSR, max_jint, JVMFlag::DEFAULT, ! "The id of the last osr compilation to permit " ! "(CICountOSR must be on)"); ! ! DEVELOP_FLAG(intx, CIBreakAtOSR, -1, JVMFlag::DEFAULT, ! "The id of osr compilation to break at"); ! ! DEVELOP_FLAG(intx, CIBreakAt, -1, JVMFlag::DEFAULT, ! "The id of compilation to break at"); ! ! PRODUCT_FLAG(ccstr, CompileOnly, "", JVMFlag::STRINGLIST, ! "List of methods (pkg/class.name) to restrict compilation to"); ! ! PRODUCT_FLAG(ccstr, CompileCommandFile, NULL, JVMFlag::DEFAULT, ! "Read compiler commands from this file [.hotspot_compiler]"); ! ! PRODUCT_FLAG(ccstr, CompilerDirectivesFile, NULL, JVMFlag::DIAGNOSTIC, ! "Read compiler directives from this file"); ! ! PRODUCT_FLAG(ccstr, CompileCommand, "", JVMFlag::STRINGLIST, ! "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>"); ! ! DEVELOP_FLAG(bool, ReplayCompiles, false, JVMFlag::DEFAULT, ! "Enable replay of compilations from ReplayDataFile"); ! ! PRODUCT_FLAG(ccstr, ReplayDataFile, NULL, JVMFlag::DEFAULT, ! "File containing compilation replay information" ! "[default: ./replay_pid%p.log] (%p replaced with pid)"); ! ! PRODUCT_FLAG(ccstr, InlineDataFile, NULL, JVMFlag::DEFAULT, ! "File containing inlining replay information" ! "[default: ./inline_pid%p.log] (%p replaced with pid)"); ! ! DEVELOP_FLAG(intx, ReplaySuppressInitializers, 2, JVMFlag::RANGE, ! "Control handling of class initialization during replay: " ! "0 - don't do anything special; " ! "1 - treat all class initializers as empty; " ! "2 - treat class initializers for application classes as empty; " ! "3 - allow all class initializers to run during bootstrap but " ! " pretend they are empty after starting replay"); ! FLAG_RANGE( ReplaySuppressInitializers, 0, 3); ! ! DEVELOP_FLAG(bool, ReplayIgnoreInitErrors, false, JVMFlag::DEFAULT, ! "Ignore exceptions thrown during initialization for replay"); ! ! PRODUCT_FLAG(bool, DumpReplayDataOnError, true, JVMFlag::DEFAULT, ! "Record replay data for crashing compiler threads"); ! ! PRODUCT_FLAG(bool, CICompilerCountPerCPU, false, JVMFlag::DEFAULT, ! "1 compiler thread for log(N CPUs)"); ! ! NOTPROD_FLAG(intx, CICrashAt, -1, JVMFlag::DEFAULT, ! "id of compilation to trigger assert in compiler thread for " ! "the purpose of testing, e.g. generation of replay data"); ! ! NOTPROD_FLAG(bool, CIObjectFactoryVerify, false, JVMFlag::DEFAULT, ! "enable potentially expensive verification in ciObjectFactory"); ! ! PRODUCT_FLAG(bool, AbortVMOnCompilationFailure, false, JVMFlag::DIAGNOSTIC, ! "Abort VM when method had failed to compile."); ! ! ! // Priorities ! PRODUCT_FLAG_PD(bool, UseThreadPriorities, JVMFlag::DEFAULT, ! "Use native thread priorities"); ! ! PRODUCT_FLAG(intx, ThreadPriorityPolicy, 0, JVMFlag::RANGE, ! "0 : Normal. " ! " VM chooses priorities that are appropriate for normal " ! " applications. On Solaris NORM_PRIORITY and above are mapped " ! " to normal native priority. Java priorities below " ! " NORM_PRIORITY map to lower native priority values. On " ! " Windows applications are allowed to use higher native " ! " priorities. However, with ThreadPriorityPolicy=0, VM will " ! " not use the highest possible native priority, " ! " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with " ! " system threads. On Linux thread priorities are ignored " ! " because the OS does not support static priority in " ! " SCHED_OTHER scheduling class which is the only choice for " ! " non-root, non-realtime applications. " ! "1 : Aggressive. " ! " Java thread priorities map over to the entire range of " ! " native thread priorities. Higher Java thread priorities map " ! " to higher native thread priorities. This policy should be " ! " used with care, as sometimes it can cause performance " ! " degradation in the application and/or the entire system. On " ! " Linux/BSD/macOS this policy requires root privilege or an " ! " extended capability."); ! FLAG_RANGE( ThreadPriorityPolicy, 0, 1); ! ! PRODUCT_FLAG(bool, ThreadPriorityVerbose, false, JVMFlag::DEFAULT, ! "Print priority changes"); ! ! PRODUCT_FLAG(intx, CompilerThreadPriority, -1, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "The native priority at which compiler threads should run " ! "(-1 means no change)"); ! FLAG_RANGE( CompilerThreadPriority, min_jint, max_jint); ! FLAG_CONSTRAINT( CompilerThreadPriority, (void*)CompilerThreadPriorityConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(intx, VMThreadPriority, -1, JVMFlag::RANGE, ! "The native priority at which the VM thread should run " ! "(-1 means no change)"); ! FLAG_RANGE( VMThreadPriority, -1, 127); ! ! PRODUCT_FLAG(intx, JavaPriority1_To_OSPriority, -1, JVMFlag::RANGE, ! "Map Java priorities to OS priorities"); ! FLAG_RANGE( JavaPriority1_To_OSPriority, -1, 127); ! ! PRODUCT_FLAG(intx, JavaPriority2_To_OSPriority, -1, JVMFlag::RANGE, ! "Map Java priorities to OS priorities"); ! FLAG_RANGE( JavaPriority2_To_OSPriority, -1, 127); ! ! PRODUCT_FLAG(intx, JavaPriority3_To_OSPriority, -1, JVMFlag::RANGE, ! "Map Java priorities to OS priorities"); ! FLAG_RANGE( JavaPriority3_To_OSPriority, -1, 127); ! ! PRODUCT_FLAG(intx, JavaPriority4_To_OSPriority, -1, JVMFlag::RANGE, ! "Map Java priorities to OS priorities"); ! FLAG_RANGE( JavaPriority4_To_OSPriority, -1, 127); ! ! PRODUCT_FLAG(intx, JavaPriority5_To_OSPriority, -1, JVMFlag::RANGE, ! "Map Java priorities to OS priorities"); ! FLAG_RANGE( JavaPriority5_To_OSPriority, -1, 127); ! ! PRODUCT_FLAG(intx, JavaPriority6_To_OSPriority, -1, JVMFlag::RANGE, ! "Map Java priorities to OS priorities"); ! FLAG_RANGE( JavaPriority6_To_OSPriority, -1, 127); ! ! PRODUCT_FLAG(intx, JavaPriority7_To_OSPriority, -1, JVMFlag::RANGE, ! "Map Java priorities to OS priorities"); ! FLAG_RANGE( JavaPriority7_To_OSPriority, -1, 127); ! ! PRODUCT_FLAG(intx, JavaPriority8_To_OSPriority, -1, JVMFlag::RANGE, ! "Map Java priorities to OS priorities"); ! FLAG_RANGE( JavaPriority8_To_OSPriority, -1, 127); ! ! PRODUCT_FLAG(intx, JavaPriority9_To_OSPriority, -1, JVMFlag::RANGE, ! "Map Java priorities to OS priorities"); ! FLAG_RANGE( JavaPriority9_To_OSPriority, -1, 127); ! ! PRODUCT_FLAG(intx, JavaPriority10_To_OSPriority, -1, JVMFlag::RANGE, ! "Map Java priorities to OS priorities"); ! FLAG_RANGE( JavaPriority10_To_OSPriority, -1, 127); ! ! PRODUCT_FLAG(bool, UseCriticalJavaThreadPriority, false, JVMFlag::EXPERIMENTAL, ! "Java thread priority 10 maps to critical scheduling priority"); ! ! PRODUCT_FLAG(bool, UseCriticalCompilerThreadPriority, false, JVMFlag::EXPERIMENTAL, ! "Compiler thread(s) run at critical scheduling priority"); ! ! DEVELOP_FLAG(intx, NewCodeParameter, 0, JVMFlag::DEFAULT, ! "Testing Only: Create a dedicated integer parameter before " ! "putback"); ! ! ! // new oopmap storage allocation ! DEVELOP_FLAG(intx, MinOopMapAllocation, 8, JVMFlag::DEFAULT, ! "Minimum number of OopMap entries in an OopMapSet"); ! ! ! // Background Compilation ! DEVELOP_FLAG(intx, LongCompileThreshold, 50, JVMFlag::DEFAULT, ! "Used with +TraceLongCompiles"); ! ! ! // recompilation ! PRODUCT_FLAG_PD(intx, CompileThreshold, JVMFlag::CONSTRAINT, ! "number of interpreted method invocations before (re-)compiling"); ! FLAG_CONSTRAINT( CompileThreshold, (void*)CompileThresholdConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(double, CompileThresholdScaling, 1.0, JVMFlag::RANGE, ! "Factor to control when first compilation happens " ! "(both with and without tiered compilation): " ! "values greater than 1.0 delay counter overflow, " ! "values between 0 and 1.0 rush counter overflow, " ! "value of 1.0 leaves compilation thresholds unchanged " ! "value of 0.0 is equivalent to -Xint. " ! "" ! "Flag can be set as per-method option. " ! "If a value is specified for a method, compilation thresholds " ! "for that method are scaled by both the value of the global flag " ! "and the value of the per-method flag."); ! FLAG_RANGE( CompileThresholdScaling, 0.0, DBL_MAX); ! ! PRODUCT_FLAG(intx, Tier0InvokeNotifyFreqLog, 7, JVMFlag::RANGE, ! "Interpreter (tier 0) invocation notification frequency"); ! FLAG_RANGE( Tier0InvokeNotifyFreqLog, 0, 30); ! ! PRODUCT_FLAG(intx, Tier2InvokeNotifyFreqLog, 11, JVMFlag::RANGE, ! "C1 without MDO (tier 2) invocation notification frequency"); ! FLAG_RANGE( Tier2InvokeNotifyFreqLog, 0, 30); ! ! PRODUCT_FLAG(intx, Tier3InvokeNotifyFreqLog, 10, JVMFlag::RANGE, ! "C1 with MDO profiling (tier 3) invocation notification " ! "frequency"); ! FLAG_RANGE( Tier3InvokeNotifyFreqLog, 0, 30); ! ! PRODUCT_FLAG(intx, Tier23InlineeNotifyFreqLog, 20, JVMFlag::RANGE, ! "Inlinee invocation (tiers 2 and 3) notification frequency"); ! FLAG_RANGE( Tier23InlineeNotifyFreqLog, 0, 30); ! ! PRODUCT_FLAG(intx, Tier0BackedgeNotifyFreqLog, 10, JVMFlag::RANGE, ! "Interpreter (tier 0) invocation notification frequency"); ! FLAG_RANGE( Tier0BackedgeNotifyFreqLog, 0, 30); ! ! PRODUCT_FLAG(intx, Tier2BackedgeNotifyFreqLog, 14, JVMFlag::RANGE, ! "C1 without MDO (tier 2) invocation notification frequency"); ! FLAG_RANGE( Tier2BackedgeNotifyFreqLog, 0, 30); ! ! PRODUCT_FLAG(intx, Tier3BackedgeNotifyFreqLog, 13, JVMFlag::RANGE, ! "C1 with MDO profiling (tier 3) invocation notification " ! "frequency"); ! FLAG_RANGE( Tier3BackedgeNotifyFreqLog, 0, 30); ! ! PRODUCT_FLAG(intx, Tier2CompileThreshold, 0, JVMFlag::RANGE, ! "threshold at which tier 2 compilation is invoked"); ! FLAG_RANGE( Tier2CompileThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier2BackEdgeThreshold, 0, JVMFlag::RANGE, ! "Back edge threshold at which tier 2 compilation is invoked"); ! FLAG_RANGE( Tier2BackEdgeThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier3InvocationThreshold, 200, JVMFlag::RANGE, ! "Compile if number of method invocations crosses this " ! "threshold"); ! FLAG_RANGE( Tier3InvocationThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier3MinInvocationThreshold, 100, JVMFlag::RANGE, ! "Minimum invocation to compile at tier 3"); ! FLAG_RANGE( Tier3MinInvocationThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier3CompileThreshold, 2000, JVMFlag::RANGE, ! "Threshold at which tier 3 compilation is invoked (invocation " ! "minimum must be satisfied)"); ! FLAG_RANGE( Tier3CompileThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier3BackEdgeThreshold, 60000, JVMFlag::RANGE, ! "Back edge threshold at which tier 3 OSR compilation is invoked"); ! FLAG_RANGE( Tier3BackEdgeThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier3AOTInvocationThreshold, 10000, JVMFlag::RANGE, ! "Compile if number of method invocations crosses this " ! "threshold if coming from AOT"); ! FLAG_RANGE( Tier3AOTInvocationThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier3AOTMinInvocationThreshold, 1000, JVMFlag::RANGE, ! "Minimum invocation to compile at tier 3 if coming from AOT"); ! FLAG_RANGE( Tier3AOTMinInvocationThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier3AOTCompileThreshold, 15000, JVMFlag::RANGE, ! "Threshold at which tier 3 compilation is invoked (invocation " ! "minimum must be satisfied) if coming from AOT"); ! FLAG_RANGE( Tier3AOTCompileThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier3AOTBackEdgeThreshold, 120000, JVMFlag::RANGE, ! "Back edge threshold at which tier 3 OSR compilation is invoked " ! "if coming from AOT"); ! FLAG_RANGE( Tier3AOTBackEdgeThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier0AOTInvocationThreshold, 200, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Switch to interpreter to profile if the number of method " ! "invocations crosses this threshold if coming from AOT " ! "(applicable only with " ! "CompilationMode=high-only|high-only-quick-internal)"); ! FLAG_RANGE( Tier0AOTInvocationThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier0AOTMinInvocationThreshold, 100, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Minimum number of invocations to switch to interpreter " ! "to profile if coming from AOT " ! "(applicable only with " ! "CompilationMode=high-only|high-only-quick-internal)"); ! FLAG_RANGE( Tier0AOTMinInvocationThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier0AOTCompileThreshold, 2000, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Threshold at which to switch to interpreter to profile " ! "if coming from AOT " ! "(invocation minimum must be satisfied, " ! "applicable only with " ! "CompilationMode=high-only|high-only-quick-internal)"); ! FLAG_RANGE( Tier0AOTCompileThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier0AOTBackEdgeThreshold, 60000, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Back edge threshold at which to switch to interpreter " ! "to profile if coming from AOT " ! "(applicable only with " ! "CompilationMode=high-only|high-only-quick-internal)"); ! FLAG_RANGE( Tier0AOTBackEdgeThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier4InvocationThreshold, 5000, JVMFlag::RANGE, ! "Compile if number of method invocations crosses this " ! "threshold"); ! FLAG_RANGE( Tier4InvocationThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier4MinInvocationThreshold, 600, JVMFlag::RANGE, ! "Minimum invocation to compile at tier 4"); ! FLAG_RANGE( Tier4MinInvocationThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier4CompileThreshold, 15000, JVMFlag::RANGE, ! "Threshold at which tier 4 compilation is invoked (invocation " ! "minimum must be satisfied)"); ! FLAG_RANGE( Tier4CompileThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier4BackEdgeThreshold, 40000, JVMFlag::RANGE, ! "Back edge threshold at which tier 4 OSR compilation is invoked"); ! FLAG_RANGE( Tier4BackEdgeThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier40InvocationThreshold, 5000, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Compile if number of method invocations crosses this " ! "threshold (applicable only with " ! "CompilationMode=high-only|high-only-quick-internal)"); ! FLAG_RANGE( Tier40InvocationThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier40MinInvocationThreshold, 600, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Minimum number of invocations to compile at tier 4 " ! "(applicable only with " ! "CompilationMode=high-only|high-only-quick-internal)"); ! FLAG_RANGE( Tier40MinInvocationThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier40CompileThreshold, 10000, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Threshold at which tier 4 compilation is invoked (invocation " ! "minimum must be satisfied, applicable only with " ! "CompilationMode=high-only|high-only-quick-internal)"); ! FLAG_RANGE( Tier40CompileThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier40BackEdgeThreshold, 15000, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "Back edge threshold at which tier 4 OSR compilation is invoked " ! "(applicable only with " ! "CompilationMode=high-only|high-only-quick-internal)"); ! FLAG_RANGE( Tier40BackEdgeThreshold, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier0Delay, 5, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "If C2 queue size grows over this amount per compiler thread " ! "do not start profiling in the interpreter " ! "(applicable only with " ! "CompilationMode=high-only|high-only-quick-internal)"); ! FLAG_RANGE( Tier0Delay, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier3DelayOn, 5, JVMFlag::RANGE, ! "If C2 queue size grows over this amount per compiler thread " ! "stop compiling at tier 3 and start compiling at tier 2"); ! FLAG_RANGE( Tier3DelayOn, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier3DelayOff, 2, JVMFlag::RANGE, ! "If C2 queue size is less than this amount per compiler thread " ! "allow methods compiled at tier 2 transition to tier 3"); ! FLAG_RANGE( Tier3DelayOff, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier3LoadFeedback, 5, JVMFlag::RANGE, ! "Tier 3 thresholds will increase twofold when C1 queue size " ! "reaches this amount per compiler thread"); ! FLAG_RANGE( Tier3LoadFeedback, 0, max_jint); ! ! PRODUCT_FLAG(intx, Tier4LoadFeedback, 3, JVMFlag::RANGE, ! "Tier 4 thresholds will increase twofold when C2 queue size " ! "reaches this amount per compiler thread"); ! FLAG_RANGE( Tier4LoadFeedback, 0, max_jint); ! ! PRODUCT_FLAG(intx, TieredCompileTaskTimeout, 50, JVMFlag::RANGE, ! "Kill compile task if method was not used within " ! "given timeout in milliseconds"); ! FLAG_RANGE( TieredCompileTaskTimeout, 0, max_intx); ! ! PRODUCT_FLAG(intx, TieredStopAtLevel, 4, JVMFlag::RANGE, ! "Stop at given compilation level"); ! FLAG_RANGE( TieredStopAtLevel, 0, 4); ! ! PRODUCT_FLAG(intx, Tier0ProfilingStartPercentage, 200, JVMFlag::RANGE, ! "Start profiling in interpreter if the counters exceed tier 3 " ! "thresholds (tier 4 thresholds with " ! "CompilationMode=high-only|high-only-quick-internal)" ! "by the specified percentage"); ! FLAG_RANGE( Tier0ProfilingStartPercentage, 0, max_jint); ! ! PRODUCT_FLAG(uintx, IncreaseFirstTierCompileThresholdAt, 50, JVMFlag::RANGE, ! "Increase the compile threshold for C1 compilation if the code " ! "cache is filled by the specified percentage"); ! FLAG_RANGE( IncreaseFirstTierCompileThresholdAt, 0, 99); ! ! PRODUCT_FLAG(intx, TieredRateUpdateMinTime, 1, JVMFlag::RANGE, ! "Minimum rate sampling interval (in milliseconds)"); ! FLAG_RANGE( TieredRateUpdateMinTime, 0, max_intx); ! ! PRODUCT_FLAG(intx, TieredRateUpdateMaxTime, 25, JVMFlag::RANGE, ! "Maximum rate sampling interval (in milliseconds)"); ! FLAG_RANGE( TieredRateUpdateMaxTime, 0, max_intx); ! ! PRODUCT_FLAG(ccstr, CompilationMode, "default", JVMFlag::DEFAULT, ! "Compilation modes: " ! "default: normal tiered compilation; " ! "quick-only: C1-only mode; " ! "high-only: C2/JVMCI-only mode; " ! "high-only-quick-internal: C2/JVMCI-only mode, " ! "with JVMCI compiler compiled with C1."); ! ! PRODUCT_FLAG_PD(bool, TieredCompilation, JVMFlag::DEFAULT, ! "Enable tiered compilation"); ! ! PRODUCT_FLAG(bool, PrintTieredEvents, false, JVMFlag::DEFAULT, ! "Print tiered events notifications"); ! ! PRODUCT_FLAG_PD(intx, OnStackReplacePercentage, JVMFlag::CONSTRAINT, ! "NON_TIERED number of method invocations/branches (expressed as " ! "% of CompileThreshold) before (re-)compiling OSR code"); ! FLAG_CONSTRAINT( OnStackReplacePercentage, (void*)OnStackReplacePercentageConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(intx, InterpreterProfilePercentage, 33, JVMFlag::RANGE, ! "NON_TIERED number of method invocations/branches (expressed as " ! "% of CompileThreshold) before profiling in the interpreter"); ! FLAG_RANGE( InterpreterProfilePercentage, 0, 100); ! ! DEVELOP_FLAG(intx, DesiredMethodLimit, 8000, JVMFlag::DEFAULT, ! "The desired maximum method size (in bytecodes) after inlining"); ! ! DEVELOP_FLAG(intx, HugeMethodLimit, 8000, JVMFlag::DEFAULT, ! "Don't compile methods larger than this if " ! "+DontCompileHugeMethods"); ! ! ! // Properties for Java libraries ! PRODUCT_FLAG(uint64_t, MaxDirectMemorySize, 0, JVMFlag::RANGE, ! "Maximum total size of NIO direct-buffer allocations"); ! FLAG_RANGE( MaxDirectMemorySize, 0, max_jlong); ! ! ! // Flags used for temporary code during development ! PRODUCT_FLAG(bool, UseNewCode, false, JVMFlag::DIAGNOSTIC, ! "Testing Only: Use the new version while testing"); ! ! PRODUCT_FLAG(bool, UseNewCode2, false, JVMFlag::DIAGNOSTIC, ! "Testing Only: Use the new version while testing"); ! ! PRODUCT_FLAG(bool, UseNewCode3, false, JVMFlag::DIAGNOSTIC, ! "Testing Only: Use the new version while testing"); ! ! ! // flags for performance data collection ! PRODUCT_FLAG(bool, UsePerfData, true, JVMFlag::DEFAULT, ! "Flag to disable jvmstat instrumentation for performance testing " ! "and problem isolation purposes"); ! ! PRODUCT_FLAG(bool, PerfDataSaveToFile, false, JVMFlag::DEFAULT, ! "Save PerfData memory to hsperfdata_<pid> file on exit"); ! ! PRODUCT_FLAG(ccstr, PerfDataSaveFile, NULL, JVMFlag::DEFAULT, ! "Save PerfData memory to the specified absolute pathname. " ! "The string %p in the file name (if present) " ! "will be replaced by pid"); ! ! PRODUCT_FLAG(intx, PerfDataSamplingInterval, 50, JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Data sampling interval (in milliseconds)"); ! //TODO: to avoid circular dependency, the min/max cannot be declared in header file ! //FLAG_RANGE( PerfDataSamplingInterval, PeriodicTask::min_interval, max_jint); ! FLAG_CONSTRAINT( PerfDataSamplingInterval, (void*)PerfDataSamplingIntervalFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(bool, PerfDisableSharedMem, false, JVMFlag::DEFAULT, ! "Store performance data in standard memory"); ! ! PRODUCT_FLAG(intx, PerfDataMemorySize, 32*K, JVMFlag::RANGE, ! "Size of performance data memory region. Will be rounded " ! "up to a multiple of the native os page size."); ! FLAG_RANGE( PerfDataMemorySize, 128, 32*64*K); ! ! PRODUCT_FLAG(intx, PerfMaxStringConstLength, 1024, JVMFlag::RANGE, ! "Maximum PerfStringConstant string length before truncation"); ! FLAG_RANGE( PerfMaxStringConstLength, 32, 32*K); ! ! PRODUCT_FLAG(bool, PerfAllowAtExitRegistration, false, JVMFlag::DEFAULT, ! "Allow registration of atexit() methods"); ! ! PRODUCT_FLAG(bool, PerfBypassFileSystemCheck, false, JVMFlag::DEFAULT, ! "Bypass Win32 file system criteria checks (Windows Only)"); ! ! PRODUCT_FLAG(intx, UnguardOnExecutionViolation, 0, JVMFlag::RANGE, ! "Unguard page and retry on no-execute fault (Win32 only) " ! "0=off, 1=conservative, 2=aggressive"); ! FLAG_RANGE( UnguardOnExecutionViolation, 0, 2); ! ! ! // Serviceability Support ! PRODUCT_FLAG(bool, ManagementServer, false, JVMFlag::DEFAULT, ! "Create JMX Management Server"); ! ! PRODUCT_FLAG(bool, DisableAttachMechanism, false, JVMFlag::DEFAULT, ! "Disable mechanism that allows tools to attach to this VM"); ! ! PRODUCT_FLAG(bool, StartAttachListener, false, JVMFlag::DEFAULT, ! "Always start Attach Listener at VM startup"); ! ! PRODUCT_FLAG(bool, EnableDynamicAgentLoading, true, JVMFlag::DEFAULT, ! "Allow tools to load agents with the attach mechanism"); ! ! PRODUCT_FLAG(bool, PrintConcurrentLocks, false, JVMFlag::MANAGEABLE, ! "Print java.util.concurrent locks in thread dump"); ! ! ! // Shared spaces ! PRODUCT_FLAG(bool, UseSharedSpaces, true, JVMFlag::DEFAULT, ! "Use shared spaces for metadata"); ! ! PRODUCT_FLAG(bool, VerifySharedSpaces, false, JVMFlag::DEFAULT, ! "Verify integrity of shared spaces"); ! ! PRODUCT_FLAG(bool, RequireSharedSpaces, false, JVMFlag::DEFAULT, ! "Require shared spaces for metadata"); ! ! PRODUCT_FLAG(bool, DumpSharedSpaces, false, JVMFlag::DEFAULT, ! "Special mode: JVM reads a class list, loads classes, builds " ! "shared spaces, and dumps the shared spaces to a file to be " ! "used in future JVM runs"); ! ! PRODUCT_FLAG(bool, DynamicDumpSharedSpaces, false, JVMFlag::DEFAULT, ! "Dynamic archive"); ! ! PRODUCT_FLAG(bool, PrintSharedArchiveAndExit, false, JVMFlag::DEFAULT, ! "Print shared archive file contents"); ! ! PRODUCT_FLAG(bool, PrintSharedDictionary, false, JVMFlag::DEFAULT, ! "If PrintSharedArchiveAndExit is true, also print the shared " ! "dictionary"); ! ! PRODUCT_FLAG(size_t, SharedBaseAddress, LP64_ONLY(32*G)NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), JVMFlag::RANGE, ! "Address to allocate shared memory region for class data"); ! FLAG_RANGE( SharedBaseAddress, 0, SIZE_MAX); ! ! PRODUCT_FLAG(ccstr, SharedArchiveConfigFile, NULL, JVMFlag::DEFAULT, ! "Data to add to the CDS archive file"); ! ! PRODUCT_FLAG(uintx, SharedSymbolTableBucketSize, 4, JVMFlag::RANGE, ! "Average number of symbols per bucket in shared table"); ! FLAG_RANGE( SharedSymbolTableBucketSize, 2, 246); ! ! PRODUCT_FLAG(bool, AllowArchivingWithJavaAgent, false, JVMFlag::DIAGNOSTIC, ! "Allow Java agent to be run with CDS dumping"); ! ! PRODUCT_FLAG(bool, PrintMethodHandleStubs, false, JVMFlag::DIAGNOSTIC, ! "Print generated stub code for method handles"); ! ! DEVELOP_FLAG(bool, TraceMethodHandles, false, JVMFlag::DEFAULT, ! "trace internal method handle operations"); ! ! PRODUCT_FLAG(bool, VerifyMethodHandles, trueInDebug, JVMFlag::DIAGNOSTIC, ! "perform extra checks when constructing method handles"); ! ! PRODUCT_FLAG(bool, ShowHiddenFrames, false, JVMFlag::DIAGNOSTIC, ! "show method handle implementation frames (usually hidden)"); ! ! PRODUCT_FLAG(bool, TrustFinalNonStaticFields, false, JVMFlag::EXPERIMENTAL, ! "trust final non-static declarations for constant folding"); ! ! PRODUCT_FLAG(bool, FoldStableValues, true, JVMFlag::DIAGNOSTIC, ! "Optimize loads from stable fields (marked w/ @Stable)"); ! ! DEVELOP_FLAG(bool, TraceInvokeDynamic, false, JVMFlag::DEFAULT, ! "trace internal invoke dynamic operations"); ! ! PRODUCT_FLAG(int, UseBootstrapCallInfo, 1, JVMFlag::DIAGNOSTIC, ! "0: when resolving InDy or ConDy, force all BSM arguments to be " ! "resolved before the bootstrap method is called; 1: when a BSM " ! "that may accept a BootstrapCallInfo is detected, use that API " ! "to pass BSM arguments, which allows the BSM to delay their " ! "resolution; 2+: stress test the BCI API by calling more BSMs " ! "via that API, instead of with the eagerly-resolved array."); ! ! PRODUCT_FLAG(bool, PauseAtStartup, false, JVMFlag::DIAGNOSTIC, ! "Causes the VM to pause at startup time and wait for the pause " ! "file to be removed (default: ./vm.paused.<pid>)"); ! ! PRODUCT_FLAG(ccstr, PauseAtStartupFile, NULL, JVMFlag::DIAGNOSTIC, ! "The file to create and for whose removal to await when pausing " ! "at startup. (default: ./vm.paused.<pid>)"); ! ! PRODUCT_FLAG(bool, PauseAtExit, false, JVMFlag::DIAGNOSTIC, ! "Pause and wait for keypress on exit if a debugger is attached"); ! ! PRODUCT_FLAG(bool, ExtendedDTraceProbes, false, JVMFlag::DEFAULT, ! "Enable performance-impacting dtrace probes"); ! ! PRODUCT_FLAG(bool, DTraceMethodProbes, false, JVMFlag::DEFAULT, ! "Enable dtrace probes for method-entry and method-exit"); ! ! PRODUCT_FLAG(bool, DTraceAllocProbes, false, JVMFlag::DEFAULT, ! "Enable dtrace probes for object allocation"); ! ! PRODUCT_FLAG(bool, DTraceMonitorProbes, false, JVMFlag::DEFAULT, ! "Enable dtrace probes for monitor events"); ! ! PRODUCT_FLAG(bool, RelaxAccessControlCheck, false, JVMFlag::DEFAULT, ! "Relax the access control checks in the verifier"); ! ! PRODUCT_FLAG(uintx, StringTableSize, defaultStringTableSize, JVMFlag::RANGE, ! "Number of buckets in the interned String table " ! "(will be rounded to nearest higher power of 2)"); ! FLAG_RANGE( StringTableSize, minimumStringTableSize, 16777216ul); ! ! PRODUCT_FLAG(uintx, SymbolTableSize, defaultSymbolTableSize, JVMFlag::EXPERIMENTAL | JVMFlag::RANGE, ! "Number of buckets in the JVM internal Symbol table"); ! FLAG_RANGE( SymbolTableSize, minimumSymbolTableSize, 16777216ul); ! ! PRODUCT_FLAG(bool, UseStringDeduplication, false, JVMFlag::DEFAULT, ! "Use string deduplication"); ! ! PRODUCT_FLAG(uintx, StringDeduplicationAgeThreshold, 3, JVMFlag::RANGE, ! "A string must reach this age (or be promoted to an old region) " ! "to be considered for deduplication"); ! //TODO: to avoid circular dependency, the min/max cannot be declared in header file ! //FLAG_RANGE( StringDeduplicationAgeThreshold, 1, markWord::max_age); ! ! PRODUCT_FLAG(bool, StringDeduplicationResizeALot, false, JVMFlag::DIAGNOSTIC, ! "Force table resize every time the table is scanned"); ! ! PRODUCT_FLAG(bool, StringDeduplicationRehashALot, false, JVMFlag::DIAGNOSTIC, ! "Force table rehash every time the table is scanned"); ! ! PRODUCT_FLAG(bool, WhiteBoxAPI, false, JVMFlag::DIAGNOSTIC, ! "Enable internal testing APIs"); ! ! PRODUCT_FLAG(intx, SurvivorAlignmentInBytes, 0, JVMFlag::EXPERIMENTAL | JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Default survivor space alignment in bytes"); ! FLAG_RANGE( SurvivorAlignmentInBytes, 8, 256); ! FLAG_CONSTRAINT( SurvivorAlignmentInBytes, (void*)SurvivorAlignmentInBytesConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(ccstr, DumpLoadedClassList, NULL, JVMFlag::DEFAULT, ! "Dump the names all loaded classes, that could be stored into " ! "the CDS archive, in the specified file"); ! ! PRODUCT_FLAG(ccstr, SharedClassListFile, NULL, JVMFlag::DEFAULT, ! "Override the default CDS class list"); ! ! PRODUCT_FLAG(ccstr, SharedArchiveFile, NULL, JVMFlag::DEFAULT, ! "Override the default location of the CDS archive file"); ! ! PRODUCT_FLAG(ccstr, ArchiveClassesAtExit, NULL, JVMFlag::DEFAULT, ! "The path and name of the dynamic archive file"); ! ! PRODUCT_FLAG(ccstr, ExtraSharedClassListFile, NULL, JVMFlag::DEFAULT, ! "Extra classlist for building the CDS archive file"); ! ! PRODUCT_FLAG(intx, ArchiveRelocationMode, 0, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE, ! "(0) first map at preferred address, and if " ! "unsuccessful, map at alternative address (default); " ! "(1) always map at alternative address; " ! "(2) always map at preferred address, and if unsuccessful, " ! "do not map the archive"); ! FLAG_RANGE( ArchiveRelocationMode, 0, 2); ! ! PRODUCT_FLAG(size_t, ArrayAllocatorMallocLimit, SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), JVMFlag::EXPERIMENTAL, ! "Allocation less than this value will be allocated " ! "using malloc. Larger allocations will use mmap."); ! ! PRODUCT_FLAG(bool, AlwaysAtomicAccesses, false, JVMFlag::EXPERIMENTAL, ! "Accesses to all variables should always be atomic"); ! ! PRODUCT_FLAG(bool, UseUnalignedAccesses, false, JVMFlag::DIAGNOSTIC, ! "Use unaligned memory accesses in Unsafe"); ! ! PRODUCT_FLAG_PD(bool, PreserveFramePointer, JVMFlag::DEFAULT, ! "Use the FP register for holding the frame pointer " ! "and not as a general purpose register."); ! ! PRODUCT_FLAG(bool, CheckIntrinsics, true, JVMFlag::DIAGNOSTIC, ! "When a class C is loaded, check that " ! "(1) all intrinsics defined by the VM for class C are present " ! "in the loaded class file and are marked with the " ! "@HotSpotIntrinsicCandidate annotation, that " ! "(2) there is an intrinsic registered for all loaded methods " ! "that are annotated with the @HotSpotIntrinsicCandidate " ! "annotation, and that " ! "(3) no orphan methods exist for class C (i.e., methods for " ! "which the VM declares an intrinsic but that are not declared " ! "in the loaded class C. " ! "Check (3) is available only in debug builds."); ! ! PRODUCT_FLAG_PD(intx, InitArrayShortSize, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Threshold small size (in bytes) for clearing arrays. " ! "Anything this size or smaller may get converted to discrete " ! "scalar stores."); ! FLAG_RANGE( InitArrayShortSize, 0, max_intx); ! FLAG_CONSTRAINT( InitArrayShortSize, (void*)InitArrayShortSizeConstraintFunc, JVMFlag::AfterErgo); ! ! PRODUCT_FLAG(bool, CompilerDirectivesIgnoreCompileCommands, false, JVMFlag::DIAGNOSTIC, ! "Disable backwards compatibility for compile commands."); ! ! PRODUCT_FLAG(bool, CompilerDirectivesPrint, false, JVMFlag::DIAGNOSTIC, ! "Print compiler directives on installation."); ! ! PRODUCT_FLAG(int, CompilerDirectivesLimit, 50, JVMFlag::DIAGNOSTIC, ! "Limit on number of compiler directives."); ! ! PRODUCT_FLAG(ccstr, AllocateHeapAt, NULL, JVMFlag::DEFAULT, ! "Path to the directoy where a temporary file will be created " ! "to use as the backing store for Java Heap."); ! ! PRODUCT_FLAG(ccstr, AllocateOldGenAt, NULL, JVMFlag::EXPERIMENTAL, ! "Path to the directoy where a temporary file will be " ! "created to use as the backing store for old generation." ! "File of size Xmx is pre-allocated for performance reason, so" ! "we need that much space available"); ! ! DEVELOP_FLAG(int, VerifyMetaspaceInterval, DEBUG_ONLY(500) NOT_DEBUG(0), JVMFlag::DEFAULT, ! "Run periodic metaspace verifications (0 - none, " ! "1 - always, >1 every nth interval)"); ! ! PRODUCT_FLAG(bool, ShowRegistersOnAssert, true, JVMFlag::DIAGNOSTIC, ! "On internal errors, include registers in error report."); ! ! PRODUCT_FLAG(bool, UseSwitchProfiling, true, JVMFlag::DIAGNOSTIC, ! "leverage profiling for table/lookup switch"); ! ! DEVELOP_FLAG(bool, TraceMemoryWriteback, false, JVMFlag::DEFAULT, ! "Trace memory writeback operations"); ! ! JFR_ONLY(PRODUCT_FLAG(bool, FlightRecorder, false, JVMFlag::DEFAULT, ! "(Deprecated) Enable Flight Recorder");) ! ! JFR_ONLY(PRODUCT_FLAG(ccstr, FlightRecorderOptions, NULL, JVMFlag::DEFAULT, ! "Flight Recorder options");) ! ! JFR_ONLY(PRODUCT_FLAG(ccstr, StartFlightRecording, NULL, JVMFlag::DEFAULT, ! "Start flight recording with options");) ! ! PRODUCT_FLAG(bool, UseFastUnorderedTimeStamps, false, JVMFlag::EXPERIMENTAL, ! "Use platform unstable time where supported for timestamps only"); ! ! PRODUCT_FLAG(bool, UseNewFieldLayout, true, JVMFlag::DEFAULT, ! "(Deprecated) Use new algorithm to compute field layouts"); ! ! PRODUCT_FLAG(bool, UseEmptySlotsInSupers, true, JVMFlag::DEFAULT, ! "Allow allocating fields in empty slots of super-classes"); ! ! ! #ifdef _LP64 ! PRODUCT_FLAG(bool, UseCompressedOops, false, JVMFlag::LP64, ! "Use 32-bit object references in 64-bit VM. " ! "lp64_product means flag is always constant in 32 bit VM"); ! ! PRODUCT_FLAG(bool, UseCompressedClassPointers, false, JVMFlag::LP64, ! "Use 32-bit class pointers in 64-bit VM. " ! "lp64_product means flag is always constant in 32 bit VM"); ! ! PRODUCT_FLAG(intx, ObjectAlignmentInBytes, 8, JVMFlag::LP64 | JVMFlag::RANGE | JVMFlag::CONSTRAINT, ! "Default object alignment in bytes, 8 is minimum"); ! FLAG_RANGE( ObjectAlignmentInBytes, 8, 256); ! FLAG_CONSTRAINT( ObjectAlignmentInBytes, (void*)ObjectAlignmentInBytesConstraintFunc, JVMFlag::AtParse); ! ! #elif defined(IS_DECLARING_FLAG) ! const bool UseCompressedOops = false; // !JVMFlag::LP64 ! const bool UseCompressedClassPointers = false; // !JVMFlag::LP64 ! const intx ObjectAlignmentInBytes = 8; // !JVMFlag::LP64 ! #endif // _LP64 #endif // SHARE_RUNTIME_GLOBALS_HPP
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