--- old/src/hotspot/share/runtime/globals.hpp 2020-04-05 21:35:24.399191937 -0700 +++ new/src/hotspot/share/runtime/globals.hpp 2020-04-05 21:35:24.051178837 -0700 @@ -27,6 +27,8 @@ #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" @@ -35,16 +37,81 @@ #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. +// 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 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 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 @@ -54,7 +121,7 @@ // 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 +// 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 @@ -70,7 +137,7 @@ // and they are not supported on production loads, except under explicit // direction from support engineers. // -// manageable flags are writeable external product flags. +// 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 @@ -83,27 +150,24 @@ // 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 // -// 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. +// 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. // -// range is a macro that will expand to min and max arguments for range -// checking code if provided - see jvmFlagRangeList.hpp +// JVMFlag::PLATFORM_DEPENDENT +// JVMFlag::C1 +// JVMFlag::C2 +// JVMFlag::ARCH +// JVMFlag::JVMCI // -// constraint is a macro that will expand to custom function call -// for constraint checking if provided - see jvmFlagConstraintList.hpp +// 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 @@ -112,2421 +176,2399 @@ 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.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. 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 GetField") \ - \ - 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.") \ - \ - 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_ 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.)") \ - \ - diagnostic(ccstr, PauseAtStartupFile, NULL, \ - "The file to create and for whose removal to await when pausing " \ - "at startup. (default: ./vm.paused.)") \ - \ - 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 +#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.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. 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 GetField"); + +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"); -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) +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."); + +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_ 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.)"); + +PRODUCT_FLAG(ccstr, PauseAtStartupFile, NULL, JVMFlag::DIAGNOSTIC, + "The file to create and for whose removal to await when pausing " + "at startup. (default: ./vm.paused.)"); + +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