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* Copyright (C) 2019 Apple Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "GCLogging.h"
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using WTF::PrintStream;
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#if PLATFORM(IOS_FAMILY)
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#define MAXIMUM_NUMBER_OF_FTL_COMPILER_THREADS 2
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#define MAXIMUM_NUMBER_OF_FTL_COMPILER_THREADS 8
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#if ENABLE(WEBASSEMBLY_STREAMING_API)
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constexpr bool enableWebAssemblyStreamingApi = true;
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constexpr bool enableWebAssemblyStreamingApi = false;
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// How do JSC VM options work?
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// ===========================
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// The FOR_EACH_JSC_OPTION() macro below defines a list of all JSC options in use,
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// along with their types and default values. The options values are actually
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// realized as fields in OptionsStorage embedded in JSC::Config.
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// Options::initialize() will initialize the option values with the defaults
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// specified in FOR_EACH_JSC_OPTION() below. After that, the values can be
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// programmatically read and written to using an accessor method with the same
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// name as the option. For example, the option "useJIT" can be read and set like
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// bool jitIsOn = Options::useJIT(); // Get the option value.
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// Options::useJIT() = false; // Sets the option value.
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// If you want to tweak any of these values programmatically for testing
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// purposes, you can do so in Options::initialize() after the default values
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// Alternatively, you can override the default values by specifying
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// environment variables of the form: JSC_<name of JSC option>.
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// Note: Options::initialize() tries to ensure some sanity on the option values
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// which are set by doing some range checks, and value corrections. These
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// checks are done after the option values are set. If you alter the option
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// values after the sanity checks (for your own testing), then you're liable to
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// ensure that the new values set are sane and reasonable for your own run.
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// Any modifications to options must be done before the first VM is instantiated.
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// On instantiation of the first VM instance, the Options will be write protected
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// and cannot be modified thereafter.
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#define FOR_EACH_JSC_OPTION(v) \
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v(Bool, useKernTCSM, true, Normal, "Note: this needs to go before other options since they depend on this value.") \
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v(Bool, validateOptions, false, Normal, "crashes if mis-typed JSC options were passed to the VM") \
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v(Unsigned, dumpOptions, 0, Normal, "dumps JSC options (0 = None, 1 = Overridden only, 2 = All, 3 = Verbose)") \
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v(OptionString, configFile, nullptr, Normal, "file to configure JSC options and logging location") \
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v(Bool, useLLInt, true, Normal, "allows the LLINT to be used if true") \
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v(Bool, useJIT, jitEnabledByDefault(), Normal, "allows the executable pages to be allocated for JIT and thunks if true") \
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v(Bool, useBaselineJIT, true, Normal, "allows the baseline JIT to be used if true") \
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v(Bool, useDFGJIT, true, Normal, "allows the DFG JIT to be used if true") \
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v(Bool, useRegExpJIT, jitEnabledByDefault(), Normal, "allows the RegExp JIT to be used if true") \
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v(Bool, useDOMJIT, is64Bit(), Normal, "allows the DOMJIT to be used if true") \
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v(Bool, reportMustSucceedExecutableAllocations, false, Normal, nullptr) \
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v(Unsigned, maxPerThreadStackUsage, 5 * MB, Normal, "Max allowed stack usage by the VM") \
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v(Unsigned, softReservedZoneSize, 128 * KB, Normal, "A buffer greater than reservedZoneSize that reserves space for stringifying exceptions.") \
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v(Unsigned, reservedZoneSize, 64 * KB, Normal, "The amount of stack space we guarantee to our clients (and to interal VM code that does not call out to clients).") \
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v(Bool, crashIfCantAllocateJITMemory, false, Normal, nullptr) \
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v(Unsigned, jitMemoryReservationSize, 0, Normal, "Set this number to change the executable allocation size in ExecutableAllocatorFixedVMPool. (In bytes.)") \
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v(Bool, useSeparatedWXHeap, false, Normal, nullptr) \
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v(Bool, forceCodeBlockLiveness, false, Normal, nullptr) \
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v(Bool, forceICFailure, false, Normal, nullptr) \
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v(Unsigned, repatchCountForCoolDown, 8, Normal, nullptr) \
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v(Unsigned, initialCoolDownCount, 20, Normal, nullptr) \
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v(Unsigned, repatchBufferingCountdown, 8, Normal, nullptr) \
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v(Bool, dumpGeneratedBytecodes, false, Normal, nullptr) \
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v(Bool, dumpGeneratedWasmBytecodes, false, Normal, nullptr) \
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v(Bool, dumpBytecodeLivenessResults, false, Normal, nullptr) \
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v(Bool, validateBytecode, false, Normal, nullptr) \
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v(Bool, forceDebuggerBytecodeGeneration, false, Normal, nullptr) \
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v(Bool, dumpBytecodesBeforeGeneratorification, false, Normal, nullptr) \
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v(Bool, useFunctionDotArguments, true, Normal, nullptr) \
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v(Bool, useTailCalls, true, Normal, nullptr) \
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v(Bool, optimizeRecursiveTailCalls, true, Normal, nullptr) \
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v(Bool, alwaysUseShadowChicken, false, Normal, nullptr) \
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v(Unsigned, shadowChickenLogSize, 1000, Normal, nullptr) \
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v(Unsigned, shadowChickenMaxTailDeletedFramesSize, 128, Normal, nullptr) \
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/* dumpDisassembly implies dumpDFGDisassembly. */ \
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v(Bool, dumpDisassembly, false, Normal, "dumps disassembly of all JIT compiled code upon compilation") \
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v(Bool, asyncDisassembly, false, Normal, nullptr) \
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v(Bool, dumpDFGDisassembly, false, Normal, "dumps disassembly of DFG function upon compilation") \
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v(Bool, dumpFTLDisassembly, false, Normal, "dumps disassembly of FTL function upon compilation") \
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v(Bool, dumpRegExpDisassembly, false, Normal, "dumps disassembly of RegExp upon compilation") \
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v(Bool, dumpWasmDisassembly, false, Normal, "dumps disassembly of all Wasm code upon compilation") \
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v(Bool, dumpBBQDisassembly, false, Normal, "dumps disassembly of BBQ Wasm code upon compilation") \
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v(Bool, dumpOMGDisassembly, false, Normal, "dumps disassembly of OMG Wasm code upon compilation") \
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v(Bool, logJITCodeForPerf, false, Configurable, nullptr) \
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v(OptionRange, bytecodeRangeToJITCompile, 0, Normal, "bytecode size range to allow compilation on, e.g. 1:100") \
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v(OptionRange, bytecodeRangeToDFGCompile, 0, Normal, "bytecode size range to allow DFG compilation on, e.g. 1:100") \
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v(OptionRange, bytecodeRangeToFTLCompile, 0, Normal, "bytecode size range to allow FTL compilation on, e.g. 1:100") \
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v(OptionString, jitWhitelist, nullptr, Normal, "file with list of function signatures to allow compilation on") \
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v(OptionString, dfgWhitelist, nullptr, Normal, "file with list of function signatures to allow DFG compilation on") \
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v(OptionString, ftlWhitelist, nullptr, Normal, "file with list of function signatures to allow FTL compilation on") \
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v(Bool, dumpSourceAtDFGTime, false, Normal, "dumps source code of JS function being DFG compiled") \
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v(Bool, dumpBytecodeAtDFGTime, false, Normal, "dumps bytecode of JS function being DFG compiled") \
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v(Bool, dumpGraphAfterParsing, false, Normal, nullptr) \
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v(Bool, dumpGraphAtEachPhase, false, Normal, nullptr) \
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v(Bool, dumpDFGGraphAtEachPhase, false, Normal, "dumps the DFG graph at each phase of DFG compilation (note this excludes DFG graphs during FTL compilation)") \
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v(Bool, dumpDFGFTLGraphAtEachPhase, false, Normal, "dumps the DFG graph at each phase of DFG compilation when compiling FTL code") \
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v(Bool, dumpB3GraphAtEachPhase, false, Normal, "dumps the B3 graph at each phase of compilation") \
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v(Bool, dumpAirGraphAtEachPhase, false, Normal, "dumps the Air graph at each phase of compilation") \
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v(Bool, verboseDFGBytecodeParsing, false, Normal, nullptr) \
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v(Bool, safepointBeforeEachPhase, true, Normal, nullptr) \
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v(Bool, verboseCompilation, false, Normal, nullptr) \
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v(Bool, verboseFTLCompilation, false, Normal, nullptr) \
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v(Bool, logCompilationChanges, false, Normal, nullptr) \
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v(Bool, useProbeOSRExit, false, Normal, nullptr) \
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v(Bool, printEachOSRExit, false, Normal, nullptr) \
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v(Bool, validateGraph, false, Normal, nullptr) \
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v(Bool, validateGraphAtEachPhase, false, Normal, nullptr) \
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v(Bool, verboseValidationFailure, false, Normal, nullptr) \
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v(Bool, verboseOSR, false, Normal, nullptr) \
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v(Bool, verboseDFGOSRExit, false, Normal, nullptr) \
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v(Bool, verboseFTLOSRExit, false, Normal, nullptr) \
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v(Bool, verboseCallLink, false, Normal, nullptr) \
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v(Bool, verboseCompilationQueue, false, Normal, nullptr) \
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v(Bool, reportCompileTimes, false, Normal, "dumps JS function signature and the time it took to compile in all tiers") \
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v(Bool, reportBaselineCompileTimes, false, Normal, "dumps JS function signature and the time it took to BaselineJIT compile") \
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v(Bool, reportDFGCompileTimes, false, Normal, "dumps JS function signature and the time it took to DFG and FTL compile") \
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v(Bool, reportFTLCompileTimes, false, Normal, "dumps JS function signature and the time it took to FTL compile") \
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v(Bool, reportTotalCompileTimes, false, Normal, nullptr) \
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v(Bool, reportTotalPhaseTimes, false, Normal, "This prints phase times at the end of running script inside jsc.cpp") \
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v(Bool, reportParseTimes, false, Normal, "dumps JS function signature and the time it took to parse") \
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v(Bool, reportBytecodeCompileTimes, false, Normal, "dumps JS function signature and the time it took to bytecode compile") \
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v(Bool, countParseTimes, false, Normal, "counts parse times") \
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v(Bool, verboseExitProfile, false, Normal, nullptr) \
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v(Bool, verboseCFA, false, Normal, nullptr) \
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v(Bool, verboseDFGFailure, false, Normal, nullptr) \
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v(Bool, verboseFTLToJSThunk, false, Normal, nullptr) \
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v(Bool, verboseFTLFailure, false, Normal, nullptr) \
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v(Bool, alwaysComputeHash, false, Normal, nullptr) \
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v(Bool, testTheFTL, false, Normal, nullptr) \
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v(Bool, verboseSanitizeStack, false, Normal, nullptr) \
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v(Bool, useGenerationalGC, true, Normal, nullptr) \
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v(Bool, useConcurrentGC, true, Normal, nullptr) \
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v(Bool, collectContinuously, false, Normal, nullptr) \
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v(Double, collectContinuouslyPeriodMS, 1, Normal, nullptr) \
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v(Bool, forceFencedBarrier, false, Normal, nullptr) \
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v(Bool, verboseVisitRace, false, Normal, nullptr) \
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v(Bool, optimizeParallelSlotVisitorsForStoppedMutator, false, Normal, nullptr) \
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v(Unsigned, largeHeapSize, 32 * 1024 * 1024, Normal, nullptr) \
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v(Unsigned, smallHeapSize, 1 * 1024 * 1024, Normal, nullptr) \
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v(Double, smallHeapRAMFraction, 0.25, Normal, nullptr) \
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v(Double, smallHeapGrowthFactor, 2, Normal, nullptr) \
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v(Double, mediumHeapRAMFraction, 0.5, Normal, nullptr) \
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v(Double, mediumHeapGrowthFactor, 1.5, Normal, nullptr) \
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v(Double, largeHeapGrowthFactor, 1.24, Normal, nullptr) \
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v(Double, miniVMHeapGrowthFactor, 1.27, Normal, nullptr) \
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v(Double, criticalGCMemoryThreshold, 0.80, Normal, "percent memory in use the GC considers critical. The collector is much more aggressive above this threshold") \
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v(Double, minimumMutatorUtilization, 0, Normal, nullptr) \
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v(Double, maximumMutatorUtilization, 0.7, Normal, nullptr) \
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v(Double, epsilonMutatorUtilization, 0.01, Normal, nullptr) \
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v(Double, concurrentGCMaxHeadroom, 1.5, Normal, nullptr) \
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v(Double, concurrentGCPeriodMS, 2, Normal, nullptr) \
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v(Bool, useStochasticMutatorScheduler, true, Normal, nullptr) \
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v(Double, minimumGCPauseMS, 0.3, Normal, nullptr) \
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v(Double, gcPauseScale, 0.3, Normal, nullptr) \
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v(Double, gcIncrementBytes, 10000, Normal, nullptr) \
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v(Double, gcIncrementMaxBytes, 100000, Normal, nullptr) \
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v(Double, gcIncrementScale, 0, Normal, nullptr) \
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v(Bool, scribbleFreeCells, false, Normal, nullptr) \
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v(Double, sizeClassProgression, 1.4, Normal, nullptr) \
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v(Unsigned, preciseAllocationCutoff, 100000, Normal, nullptr) \
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v(Bool, dumpSizeClasses, false, Normal, nullptr) \
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v(Bool, useBumpAllocator, true, Normal, nullptr) \
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v(Bool, stealEmptyBlocksFromOtherAllocators, true, Normal, nullptr) \
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v(Bool, eagerlyUpdateTopCallFrame, false, Normal, nullptr) \
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v(Bool, dumpZappedCellCrashData, false, Normal, nullptr) \
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v(Bool, useOSREntryToDFG, true, Normal, nullptr) \
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v(Bool, useOSREntryToFTL, true, Normal, nullptr) \
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v(Bool, useFTLJIT, true, Normal, "allows the FTL JIT to be used if true") \
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v(Bool, validateFTLOSRExitLiveness, false, Normal, nullptr) \
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v(Unsigned, defaultB3OptLevel, 2, Normal, nullptr) \
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v(Bool, b3AlwaysFailsBeforeCompile, false, Normal, nullptr) \
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v(Bool, b3AlwaysFailsBeforeLink, false, Normal, nullptr) \
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v(Bool, ftlCrashes, false, Normal, nullptr) /* fool-proof way of checking that you ended up in the FTL. ;-) */\
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v(Bool, clobberAllRegsInFTLICSlowPath, ASSERT_ENABLED, Normal, nullptr) \
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v(Bool, enableJITDebugAssertions, ASSERT_ENABLED, Normal, nullptr) \
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v(Bool, useAccessInlining, true, Normal, nullptr) \
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v(Unsigned, maxAccessVariantListSize, 8, Normal, nullptr) \
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v(Bool, usePolyvariantDevirtualization, true, Normal, nullptr) \
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v(Bool, usePolymorphicAccessInlining, true, Normal, nullptr) \
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v(Unsigned, maxPolymorphicAccessInliningListSize, 8, Normal, nullptr) \
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v(Bool, usePolymorphicCallInlining, true, Normal, nullptr) \
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v(Bool, usePolymorphicCallInliningForNonStubStatus, false, Normal, nullptr) \
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v(Unsigned, maxPolymorphicCallVariantListSize, 15, Normal, nullptr) \
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v(Unsigned, maxPolymorphicCallVariantListSizeForTopTier, 5, Normal, nullptr) \
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v(Unsigned, maxPolymorphicCallVariantListSizeForWebAssemblyToJS, 5, Normal, nullptr) \
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v(Unsigned, maxPolymorphicCallVariantsForInlining, 5, Normal, nullptr) \
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v(Unsigned, frequentCallThreshold, 2, Normal, nullptr) \
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v(Double, minimumCallToKnownRate, 0.51, Normal, nullptr) \
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v(Bool, createPreHeaders, true, Normal, nullptr) \
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v(Bool, useMovHintRemoval, true, Normal, nullptr) \
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v(Bool, usePutStackSinking, true, Normal, nullptr) \
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v(Bool, useObjectAllocationSinking, true, Normal, nullptr) \
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v(Bool, useValueRepElimination, true, Normal, nullptr) \
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v(Bool, useArityFixupInlining, true, Normal, nullptr) \
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v(Bool, logExecutableAllocation, false, Normal, nullptr) \
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v(Unsigned, maxDFGNodesInBasicBlockForPreciseAnalysis, 20000, Normal, "Disable precise but costly analysis and give conservative results if the number of DFG nodes in a block exceeds this threshold") \
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v(Bool, useConcurrentJIT, true, Normal, "allows the DFG / FTL compilation in threads other than the executing JS thread") \
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v(Unsigned, numberOfDFGCompilerThreads, computeNumberOfWorkerThreads(3, 2) - 1, Normal, nullptr) \
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v(Unsigned, numberOfFTLCompilerThreads, computeNumberOfWorkerThreads(MAXIMUM_NUMBER_OF_FTL_COMPILER_THREADS, 2) - 1, Normal, nullptr) \
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v(Int32, priorityDeltaOfDFGCompilerThreads, computePriorityDeltaOfWorkerThreads(-1, 0), Normal, nullptr) \
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v(Int32, priorityDeltaOfFTLCompilerThreads, computePriorityDeltaOfWorkerThreads(-2, 0), Normal, nullptr) \
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v(Int32, priorityDeltaOfWasmCompilerThreads, computePriorityDeltaOfWorkerThreads(-1, 0), Normal, nullptr) \
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v(Bool, useProfiler, false, Normal, nullptr) \
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v(Bool, disassembleBaselineForProfiler, true, Normal, nullptr) \
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v(Bool, useArchitectureSpecificOptimizations, true, Normal, nullptr) \
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v(Bool, breakOnThrow, false, Normal, nullptr) \
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v(Unsigned, maximumOptimizationCandidateBytecodeCost, 100000, Normal, nullptr) \
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v(Unsigned, maximumFunctionForCallInlineCandidateBytecodeCost, 120, Normal, nullptr) \
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v(Unsigned, maximumFunctionForClosureCallInlineCandidateBytecodeCost, 100, Normal, nullptr) \
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v(Unsigned, maximumFunctionForConstructInlineCandidateBytecoodeCost, 100, Normal, nullptr) \
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v(Unsigned, maximumFTLCandidateBytecodeCost, 20000, Normal, nullptr) \
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/* Depth of inline stack, so 1 = no inlining, 2 = one level, etc. */ \
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v(Unsigned, maximumInliningDepth, 5, Normal, "maximum allowed inlining depth. Depth of 1 means no inlining") \
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v(Unsigned, maximumInliningRecursion, 2, Normal, nullptr) \
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/* Maximum size of a caller for enabling inlining. This is purely to protect us */\
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/* from super long compiles that take a lot of memory. */\
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v(Unsigned, maximumInliningCallerBytecodeCost, 10000, Normal, nullptr) \
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v(Unsigned, maximumVarargsForInlining, 100, Normal, nullptr) \
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v(Unsigned, maximumBinaryStringSwitchCaseLength, 50, Normal, nullptr) \
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v(Unsigned, maximumBinaryStringSwitchTotalLength, 2000, Normal, nullptr) \
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v(Double, jitPolicyScale, 1.0, Normal, "scale JIT thresholds to this specified ratio between 0.0 (compile ASAP) and 1.0 (compile like normal).") \
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v(Bool, forceEagerCompilation, false, Normal, nullptr) \
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v(Int32, thresholdForJITAfterWarmUp, 500, Normal, nullptr) \
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v(Int32, thresholdForJITSoon, 100, Normal, nullptr) \
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v(Int32, thresholdForOptimizeAfterWarmUp, 1000, Normal, nullptr) \
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v(Int32, thresholdForOptimizeAfterLongWarmUp, 1000, Normal, nullptr) \
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v(Int32, thresholdForOptimizeSoon, 1000, Normal, nullptr) \
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v(Int32, executionCounterIncrementForLoop, 1, Normal, nullptr) \
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v(Int32, executionCounterIncrementForEntry, 15, Normal, nullptr) \
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v(Int32, thresholdForFTLOptimizeAfterWarmUp, 100000, Normal, nullptr) \
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v(Int32, thresholdForFTLOptimizeSoon, 1000, Normal, nullptr) \
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v(Int32, ftlTierUpCounterIncrementForLoop, 1, Normal, nullptr) \
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v(Int32, ftlTierUpCounterIncrementForReturn, 15, Normal, nullptr) \
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v(Unsigned, ftlOSREntryFailureCountForReoptimization, 15, Normal, nullptr) \
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v(Unsigned, ftlOSREntryRetryThreshold, 100, Normal, nullptr) \
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v(Int32, evalThresholdMultiplier, 10, Normal, nullptr) \
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v(Unsigned, maximumEvalCacheableSourceLength, 256, Normal, nullptr) \
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v(Bool, randomizeExecutionCountsBetweenCheckpoints, false, Normal, nullptr) \
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v(Int32, maximumExecutionCountsBetweenCheckpointsForBaseline, 1000, Normal, nullptr) \
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v(Int32, maximumExecutionCountsBetweenCheckpointsForUpperTiers, 50000, Normal, nullptr) \
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v(Unsigned, likelyToTakeSlowCaseMinimumCount, 20, Normal, nullptr) \
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v(Unsigned, couldTakeSlowCaseMinimumCount, 10, Normal, nullptr) \
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v(Unsigned, osrExitCountForReoptimization, 100, Normal, nullptr) \
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v(Unsigned, osrExitCountForReoptimizationFromLoop, 5, Normal, nullptr) \
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v(Unsigned, reoptimizationRetryCounterMax, 0, Normal, nullptr) \
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v(Unsigned, minimumOptimizationDelay, 1, Normal, nullptr) \
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v(Unsigned, maximumOptimizationDelay, 5, Normal, nullptr) \
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v(Double, desiredProfileLivenessRate, 0.75, Normal, nullptr) \
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v(Double, desiredProfileFullnessRate, 0.35, Normal, nullptr) \
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v(Double, doubleVoteRatioForDoubleFormat, 2, Normal, nullptr) \
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v(Double, structureCheckVoteRatioForHoisting, 1, Normal, nullptr) \
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v(Double, checkArrayVoteRatioForHoisting, 1, Normal, nullptr) \
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v(Unsigned, maximumDirectCallStackSize, 200, Normal, nullptr) \
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v(Unsigned, minimumNumberOfScansBetweenRebalance, 100, Normal, nullptr) \
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v(Unsigned, numberOfGCMarkers, computeNumberOfGCMarkers(8), Normal, nullptr) \
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v(Bool, useParallelMarkingConstraintSolver, true, Normal, nullptr) \
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v(Unsigned, opaqueRootMergeThreshold, 1000, Normal, nullptr) \
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v(Double, minHeapUtilization, 0.8, Normal, nullptr) \
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v(Double, minMarkedBlockUtilization, 0.9, Normal, nullptr) \
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v(Unsigned, slowPathAllocsBetweenGCs, 0, Normal, "force a GC on every Nth slow path alloc, where N is specified by this option") \
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v(Double, percentCPUPerMBForFullTimer, 0.0003125, Normal, nullptr) \
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v(Double, percentCPUPerMBForEdenTimer, 0.0025, Normal, nullptr) \
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v(Double, collectionTimerMaxPercentCPU, 0.05, Normal, nullptr) \
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v(Bool, forceWeakRandomSeed, false, Normal, nullptr) \
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v(Unsigned, forcedWeakRandomSeed, 0, Normal, nullptr) \
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v(Bool, useZombieMode, false, Normal, "debugging option to scribble over dead objects with 0xbadbeef0") \
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v(Bool, useImmortalObjects, false, Normal, "debugging option to keep all objects alive forever") \
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v(Bool, sweepSynchronously, false, Normal, "debugging option to sweep all dead objects synchronously at GC end before resuming mutator") \
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v(Unsigned, maxSingleAllocationSize, 0, Configurable, "debugging option to limit individual allocations to a max size (0 = limit not set, N = limit size in bytes)") \
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v(GCLogLevel, logGC, GCLogging::None, Normal, "debugging option to log GC activity (0 = None, 1 = Basic, 2 = Verbose)") \
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v(Bool, useGC, true, Normal, nullptr) \
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v(Bool, gcAtEnd, false, Normal, "If true, the jsc CLI will do a GC before exiting") \
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v(Bool, forceGCSlowPaths, false, Normal, "If true, we will force all JIT fast allocations down their slow paths.") \
350
v(Bool, forceDidDeferGCWork, false, Normal, "If true, we will force all DeferGC destructions to perform a GC.") \
351
v(Unsigned, gcMaxHeapSize, 0, Normal, nullptr) \
352
v(Unsigned, forceRAMSize, 0, Normal, nullptr) \
353
v(Bool, recordGCPauseTimes, false, Normal, nullptr) \
354
v(Bool, dumpHeapStatisticsAtVMDestruction, false, Normal, nullptr) \
355
v(Bool, forceCodeBlockToJettisonDueToOldAge, false, Normal, "If true, this means that anytime we can jettison a CodeBlock due to old age, we do.") \
356
v(Bool, useEagerCodeBlockJettisonTiming, false, Normal, "If true, the time slices for jettisoning a CodeBlock due to old age are shrunk significantly.") \
358
v(Bool, useTypeProfiler, false, Normal, nullptr) \
359
v(Bool, useControlFlowProfiler, false, Normal, nullptr) \
361
v(Bool, useSamplingProfiler, false, Normal, nullptr) \
362
v(Unsigned, sampleInterval, 1000, Normal, "Time between stack traces in microseconds.") \
363
v(Bool, collectSamplingProfilerDataForJSCShell, false, Normal, "This corresponds to the JSC shell's --sample option.") \
364
v(Unsigned, samplingProfilerTopFunctionsCount, 12, Normal, "Number of top functions to report when using the command line interface.") \
365
v(Unsigned, samplingProfilerTopBytecodesCount, 40, Normal, "Number of top bytecodes to report when using the command line interface.") \
366
v(OptionString, samplingProfilerPath, nullptr, Normal, "The path to the directory to write sampiling profiler output to. This probably will not work with WK2 unless the path is in the whitelist.") \
367
v(Bool, sampleCCode, false, Normal, "Causes the sampling profiler to record profiling data for C frames.") \
369
v(Bool, alwaysGeneratePCToCodeOriginMap, false, Normal, "This will make sure we always generate a PCToCodeOriginMap for JITed code.") \
371
v(Double, randomIntegrityAuditRate, 0.05, Normal, "Probability of random integrity audits [0.0 - 1.0]") \
372
v(Bool, verifyHeap, false, Normal, nullptr) \
373
v(Unsigned, numberOfGCCyclesToRecordForVerification, 3, Normal, nullptr) \
375
v(Unsigned, exceptionStackTraceLimit, 100, Normal, "Stack trace limit for internal Exception object") \
376
v(Unsigned, defaultErrorStackTraceLimit, 100, Normal, "The default value for Error.stackTraceLimit") \
377
v(Bool, useExceptionFuzz, false, Normal, nullptr) \
378
v(Unsigned, fireExceptionFuzzAt, 0, Normal, nullptr) \
379
v(Bool, validateDFGExceptionHandling, false, Normal, "Causes the DFG to emit code validating exception handling for each node that can exit") /* This is true by default on Debug builds */\
380
v(Bool, dumpSimulatedThrows, false, Normal, "Dumps the call stack of the last simulated throw if exception scope verification fails") \
381
v(Bool, validateExceptionChecks, false, Normal, "Verifies that needed exception checks are performed.") \
382
v(Unsigned, unexpectedExceptionStackTraceLimit, 100, Normal, "Stack trace limit for debugging unexpected exceptions observed in the VM") \
384
v(Bool, useExecutableAllocationFuzz, false, Normal, nullptr) \
385
v(Unsigned, fireExecutableAllocationFuzzAt, 0, Normal, nullptr) \
386
v(Unsigned, fireExecutableAllocationFuzzAtOrAfter, 0, Normal, nullptr) \
387
v(Bool, verboseExecutableAllocationFuzz, false, Normal, nullptr) \
389
v(Bool, useOSRExitFuzz, false, Normal, nullptr) \
390
v(Unsigned, fireOSRExitFuzzAtStatic, 0, Normal, nullptr) \
391
v(Unsigned, fireOSRExitFuzzAt, 0, Normal, nullptr) \
392
v(Unsigned, fireOSRExitFuzzAtOrAfter, 0, Normal, nullptr) \
394
v(Unsigned, seedOfVMRandomForFuzzer, 0, Normal, "0 means not fuzzing this; use a cryptographically random seed") \
395
v(Bool, useRandomizingFuzzerAgent, false, Normal, nullptr) \
396
v(Unsigned, seedOfRandomizingFuzzerAgent, 1, Normal, nullptr) \
397
v(Bool, dumpFuzzerAgentPredictions, false, Normal, nullptr) \
398
v(Bool, useDoublePredictionFuzzerAgent, false, Normal, nullptr) \
399
v(Bool, useFileBasedFuzzerAgent, false, Normal, nullptr) \
400
v(Bool, usePredictionFileCreatingFuzzerAgent, false, Normal, nullptr) \
401
v(Bool, requirePredictionForFileBasedFuzzerAgent, false, Normal, nullptr) \
402
v(OptionString, fuzzerPredictionsFile, nullptr, Normal, "file with list of predictions for FileBasedFuzzerAgent") \
403
v(Bool, useNarrowingNumberPredictionFuzzerAgent, false, Normal, nullptr) \
404
v(Bool, useWideningNumberPredictionFuzzerAgent, false, Normal, nullptr) \
406
v(Bool, logPhaseTimes, false, Normal, nullptr) \
407
v(Double, rareBlockPenalty, 0.001, Normal, nullptr) \
408
v(Bool, airLinearScanVerbose, false, Normal, nullptr) \
409
v(Bool, airLinearScanSpillsEverything, false, Normal, nullptr) \
410
v(Bool, airForceBriggsAllocator, false, Normal, nullptr) \
411
v(Bool, airForceIRCAllocator, false, Normal, nullptr) \
412
v(Bool, airRandomizeRegs, false, Normal, nullptr) \
413
v(Unsigned, airRandomizeRegsSeed, 0, Normal, nullptr) \
414
v(Bool, coalesceSpillSlots, true, Normal, nullptr) \
415
v(Bool, logAirRegisterPressure, false, Normal, nullptr) \
416
v(Bool, useB3TailDup, true, Normal, nullptr) \
417
v(Unsigned, maxB3TailDupBlockSize, 3, Normal, nullptr) \
418
v(Unsigned, maxB3TailDupBlockSuccessors, 3, Normal, nullptr) \
420
v(Bool, useDollarVM, false, Restricted, "installs the $vm debugging tool in global objects") \
421
v(OptionString, functionOverrides, nullptr, Restricted, "file with debugging overrides for function bodies") \
422
v(Bool, useSigillCrashAnalyzer, false, Configurable, "logs data about SIGILL crashes") \
424
v(Unsigned, watchdog, 0, Normal, "watchdog timeout (0 = Disabled, N = a timeout period of N milliseconds)") \
425
v(Bool, usePollingTraps, false, Normal, "use polling (instead of signalling) VM traps") \
427
v(Bool, useMachForExceptions, true, Normal, "Use mach exceptions rather than signals to handle faults and pass thread messages. (This does nothing on platforms without mach)") \
429
v(Bool, useICStats, false, Normal, nullptr) \
431
v(Unsigned, prototypeHitCountForLLIntCaching, 2, Normal, "Number of prototype property hits before caching a prototype in the LLInt. A count of 0 means never cache.") \
433
v(Bool, dumpCompiledRegExpPatterns, false, Normal, nullptr) \
435
v(Bool, dumpModuleRecord, false, Normal, nullptr) \
436
v(Bool, dumpModuleLoadingState, false, Normal, nullptr) \
437
v(Bool, exposeInternalModuleLoader, false, Normal, "expose the internal module loader object to the global space for debugging") \
439
v(Bool, useSuperSampler, false, Normal, nullptr) \
441
v(Bool, useSourceProviderCache, true, Normal, "If false, the parser will not use the source provider cache. It's good to verify everything works when this is false. Because the cache is so successful, it can mask bugs.") \
442
v(Bool, useCodeCache, true, Normal, "If false, the unlinked byte code cache will not be used.") \
444
v(Bool, useWebAssembly, true, Normal, "Expose the WebAssembly global object.") \
446
v(Bool, failToCompileWebAssemblyCode, false, Normal, "If true, no Wasm::Plan will sucessfully compile a function.") \
447
v(Size, webAssemblyPartialCompileLimit, 5000, Normal, "Limit on the number of bytes a Wasm::Plan::compile should attempt before checking for other work.") \
448
v(Unsigned, webAssemblyBBQAirOptimizationLevel, 0, Normal, "Air Optimization level for BBQ Web Assembly module compilations.") \
449
v(Unsigned, webAssemblyBBQB3OptimizationLevel, 1, Normal, "B3 Optimization level for BBQ Web Assembly module compilations.") \
450
v(Unsigned, webAssemblyOMGOptimizationLevel, Options::defaultB3OptLevel(), Normal, "B3 Optimization level for OMG Web Assembly module compilations.") \
452
v(Bool, useBBQTierUpChecks, true, Normal, "Enables tier up checks for our BBQ code.") \
453
v(Bool, useWebAssemblyOSR, true, Normal, nullptr) \
454
v(Int32, thresholdForBBQOptimizeAfterWarmUp, 150, Normal, "The count before we tier up a function to BBQ.") \
455
v(Int32, thresholdForBBQOptimizeSoon, 50, Normal, nullptr) \
456
v(Int32, thresholdForOMGOptimizeAfterWarmUp, 50000, Normal, "The count before we tier up a function to OMG.") \
457
v(Int32, thresholdForOMGOptimizeSoon, 500, Normal, nullptr) \
458
v(Int32, omgTierUpCounterIncrementForLoop, 1, Normal, "The amount the tier up counter is incremented on each loop backedge.") \
459
v(Int32, omgTierUpCounterIncrementForEntry, 15, Normal, "The amount the tier up counter is incremented on each function entry.") \
460
/* FIXME: enable fast memories on iOS and pre-allocate them. https://bugs.webkit.org/show_bug.cgi?id=170774 */ \
461
v(Bool, useWebAssemblyFastMemory, OS_CONSTANT(EFFECTIVE_ADDRESS_WIDTH) >= 48, Normal, "If true, we will try to use a 32-bit address space with a signal handler to bounds check wasm memory.") \
462
v(Bool, logWebAssemblyMemory, false, Normal, nullptr) \
463
v(Unsigned, webAssemblyFastMemoryRedzonePages, 128, Normal, "WebAssembly fast memories use 4GiB virtual allocations, plus a redzone (counted as multiple of 64KiB WebAssembly pages) at the end to catch reg+imm accesses which exceed 32-bit, anything beyond the redzone is explicitly bounds-checked") \
464
v(Bool, crashIfWebAssemblyCantFastMemory, false, Normal, "If true, we will crash if we can't obtain fast memory for wasm.") \
465
v(Bool, crashOnFailedWebAssemblyValidate, false, Normal, "If true, we will crash if we can't validate a wasm module instead of throwing an exception.") \
466
v(Unsigned, maxNumWebAssemblyFastMemories, 4, Normal, nullptr) \
467
v(Bool, useFastTLSForWasmContext, true, Normal, "If true, we will store context in fast TLS. If false, we will pin it to a register.") \
468
v(Bool, wasmBBQUsesAir, true, Normal, nullptr) \
469
v(Bool, useWasmLLInt, true, Normal, nullptr) \
470
v(Bool, wasmLLIntTiersUpToBBQ, true, Normal, nullptr) \
471
v(Size, webAssemblyBBQAirModeThreshold, isIOS() ? (10 * MB) : 0, Normal, "If 0, we always use BBQ Air. If Wasm module code size hits this threshold, we compile Wasm module with B3 BBQ mode.") \
472
v(Bool, useWebAssemblyStreamingApi, enableWebAssemblyStreamingApi, Normal, "Allow to run WebAssembly's Streaming API") \
473
v(Bool, useEagerWebAssemblyModuleHashing, false, Normal, "Unnamed WebAssembly modules are identified in backtraces through their hash, if available.") \
474
v(Bool, useWebAssemblyReferences, true, Normal, "Allow types from the wasm references spec.") \
475
v(Bool, useWebAssemblyMultiValues, true, Normal, "Allow types from the wasm mulit-values spec.") \
476
v(Bool, useWeakRefs, false, Normal, "Expose the WeakRef constructor.") \
477
v(Bool, useBigInt, false, Normal, "If true, we will enable BigInt support.") \
478
v(Bool, useArrayAllocationProfiling, true, Normal, "If true, we will use our normal array allocation profiling. If false, the allocation profile will always claim to be undecided.") \
479
v(Bool, forcePolyProto, false, Normal, "If true, create_this will always create an object with a poly proto structure.") \
480
v(Bool, forceMiniVMMode, false, Normal, "If true, it will force mini VM mode on.") \
481
v(Bool, useTracePoints, false, Normal, nullptr) \
482
v(Bool, traceLLIntExecution, false, Configurable, nullptr) \
483
v(Bool, traceLLIntSlowPath, false, Configurable, nullptr) \
484
v(Bool, traceBaselineJITExecution, false, Normal, nullptr) \
485
v(Unsigned, thresholdForGlobalLexicalBindingEpoch, UINT_MAX, Normal, "Threshold for global lexical binding epoch. If the epoch reaches to this value, CodeBlock metadata for scope operations will be revised globally. It needs to be greater than 1.") \
486
v(OptionString, diskCachePath, nullptr, Restricted, nullptr) \
487
v(Bool, forceDiskCache, false, Restricted, nullptr) \
488
v(Bool, validateAbstractInterpreterState, false, Restricted, nullptr) \
489
v(Double, validateAbstractInterpreterStateProbability, 0.5, Normal, nullptr) \
490
v(OptionString, dumpJITMemoryPath, nullptr, Restricted, nullptr) \
491
v(Double, dumpJITMemoryFlushInterval, 10, Restricted, "Maximum time in between flushes of the JIT memory dump in seconds.") \
492
v(Bool, useUnlinkedCodeBlockJettisoning, false, Normal, "If true, UnlinkedCodeBlock can be jettisoned.") \
493
v(Bool, forceOSRExitToLLInt, false, Normal, "If true, we always exit to the LLInt. If false, we exit to whatever is most convenient.") \
494
v(Unsigned, getByValICMaxNumberOfIdentifiers, 4, Normal, "Number of identifiers we see in the LLInt that could cause us to bail on generating an IC for get_by_val.") \
495
v(Bool, useClassFields, false, Normal, "If true, the parser will understand data fields inside classes.") \
497
enum OptionEquivalence {
502
#define FOR_EACH_JSC_ALIASED_OPTION(v) \
503
v(enableFunctionDotArguments, useFunctionDotArguments, SameOption) \
504
v(enableTailCalls, useTailCalls, SameOption) \
505
v(showDisassembly, dumpDisassembly, SameOption) \
506
v(showDFGDisassembly, dumpDFGDisassembly, SameOption) \
507
v(showFTLDisassembly, dumpFTLDisassembly, SameOption) \
508
v(alwaysDoFullCollection, useGenerationalGC, InvertedOption) \
509
v(enableOSREntryToDFG, useOSREntryToDFG, SameOption) \
510
v(enableOSREntryToFTL, useOSREntryToFTL, SameOption) \
511
v(enableAccessInlining, useAccessInlining, SameOption) \
512
v(enablePolyvariantDevirtualization, usePolyvariantDevirtualization, SameOption) \
513
v(enablePolymorphicAccessInlining, usePolymorphicAccessInlining, SameOption) \
514
v(enablePolymorphicCallInlining, usePolymorphicCallInlining, SameOption) \
515
v(enableMovHintRemoval, useMovHintRemoval, SameOption) \
516
v(enableObjectAllocationSinking, useObjectAllocationSinking, SameOption) \
517
v(enableConcurrentJIT, useConcurrentJIT, SameOption) \
518
v(enableProfiler, useProfiler, SameOption) \
519
v(enableArchitectureSpecificOptimizations, useArchitectureSpecificOptimizations, SameOption) \
520
v(enablePolyvariantCallInlining, usePolyvariantCallInlining, SameOption) \
521
v(enablePolyvariantByIdInlining, usePolyvariantByIdInlining, SameOption) \
522
v(objectsAreImmortal, useImmortalObjects, SameOption) \
523
v(showObjectStatistics, dumpObjectStatistics, SameOption) \
524
v(disableGC, useGC, InvertedOption) \
525
v(enableTypeProfiler, useTypeProfiler, SameOption) \
526
v(enableControlFlowProfiler, useControlFlowProfiler, SameOption) \
527
v(enableExceptionFuzz, useExceptionFuzz, SameOption) \
528
v(enableExecutableAllocationFuzz, useExecutableAllocationFuzz, SameOption) \
529
v(enableOSRExitFuzz, useOSRExitFuzz, SameOption) \
530
v(enableDollarVM, useDollarVM, SameOption) \
531
v(enableWebAssembly, useWebAssembly, SameOption) \
532
v(verboseDFGByteCodeParsing, verboseDFGBytecodeParsing, SameOption) \
533
v(maximumOptimizationCandidateInstructionCount, maximumOptimizationCandidateBytecodeCost, SameOption) \
534
v(maximumFunctionForCallInlineCandidateInstructionCount, maximumFunctionForCallInlineCandidateBytecodeCost, SameOption) \
535
v(maximumFunctionForClosureCallInlineCandidateInstructionCount, maximumFunctionForClosureCallInlineCandidateBytecodeCost, SameOption) \
536
v(maximumFunctionForConstructInlineCandidateInstructionCount, maximumFunctionForConstructInlineCandidateBytecoodeCost, SameOption) \
537
v(maximumFTLCandidateInstructionCount, maximumFTLCandidateBytecodeCost, SameOption) \
538
v(maximumInliningCallerSize, maximumInliningCallerBytecodeCost, SameOption) \
541
constexpr size_t countNumberOfJSCOptions()
543
#define COUNT_OPTION(type_, name_, defaultValue_, availability_, description_) count++;
545
FOR_EACH_JSC_OPTION(COUNT_OPTION);
550
constexpr size_t NumberOfOptions = countNumberOfJSCOptions();
554
enum RangeState { Uninitialized, InitError, Normal, Inverted };
556
OptionRange& operator=(int value)
558
// Only used for initialization to state Uninitialized.
559
// OptionsList specifies OptionRange options with default value 0.
560
RELEASE_ASSERT(!value);
562
m_state = Uninitialized;
569
bool init(const char*);
570
bool isInRange(unsigned);
571
const char* rangeString() const { return (m_state > InitError) ? m_rangeString : s_nullRangeStr; }
573
void dump(PrintStream& out) const;
576
static const char* const s_nullRangeStr;
579
const char* m_rangeString;
581
unsigned m_highLimit;
584
struct OptionsStorage {
586
using Unsigned = unsigned;
587
using Double = double;
588
using Int32 = int32_t;
590
using OptionRange = JSC::OptionRange;
591
using OptionString = const char*;
592
using GCLogLevel = GCLogging::Level;
594
#define DECLARE_OPTION(type_, name_, defaultValue_, availability_, description_) \
596
type_ name_##Default;
597
FOR_EACH_JSC_OPTION(DECLARE_OPTION)
598
#undef DECLARE_OPTION
601
// Options::Metadata's offsetOfOption and offsetOfOptionDefault relies on this.
602
static_assert(sizeof(OptionsStorage) <= 16 * KB);
added
removed
Source/JavaScriptCore/runtime/OptionsList.h
