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darling-JavaScriptCore/jsc.cpp

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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2004-2021 Apple Inc. All rights reserved.
* Copyright (C) 2006 Bjoern Graf (bjoern.graf@gmail.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "ArrayBuffer.h"
#include "BigIntConstructor.h"
#include "BytecodeCacheError.h"
#include "CatchScope.h"
#include "CodeBlock.h"
#include "CodeCache.h"
#include "CompilerTimingScope.h"
#include "Completion.h"
#include "ConfigFile.h"
#include "DeferredWorkTimer.h"
#include "Disassembler.h"
#include "Exception.h"
#include "ExceptionHelpers.h"
#include "HeapSnapshotBuilder.h"
#include "InitializeThreading.h"
#include "Interpreter.h"
#include "JIT.h"
#include "JITOperationList.h"
#include "JSArray.h"
#include "JSArrayBuffer.h"
#include "JSBigInt.h"
#include "JSFinalizationRegistry.h"
#include "JSFunction.h"
#include "JSInternalPromise.h"
#include "JSLock.h"
#include "JSNativeStdFunction.h"
#include "JSONObject.h"
#include "JSObjectInlines.h"
#include "JSSourceCode.h"
#include "JSString.h"
#include "JSTypedArrays.h"
#include "JSWebAssemblyInstance.h"
#include "JSWebAssemblyMemory.h"
#include "LLIntThunks.h"
#include "ObjectConstructor.h"
#include "ParserError.h"
#include "ProfilerDatabase.h"
#include "ReleaseHeapAccessScope.h"
#include "SamplingProfiler.h"
#include "SimpleTypedArrayController.h"
#include "StackVisitor.h"
#include "StructureInlines.h"
#include "SuperSampler.h"
#include "TestRunnerUtils.h"
#include "TypedArrayInlines.h"
#include "VMInspector.h"
#include "WasmCapabilities.h"
#include "WasmFaultSignalHandler.h"
#include "WasmMemory.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <type_traits>
#include <wtf/CPUTime.h>
#include <wtf/FileSystem.h>
#include <wtf/MainThread.h>
#include <wtf/MemoryPressureHandler.h>
#include <wtf/MonotonicTime.h>
#include <wtf/Scope.h>
#include <wtf/StringPrintStream.h>
#include <wtf/URL.h>
#include <wtf/WallTime.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/threads/Signals.h>
#if OS(WINDOWS)
#include <direct.h>
#include <fcntl.h>
#include <io.h>
#else
#include <unistd.h>
#endif
#if PLATFORM(COCOA)
#include <crt_externs.h>
#endif
#if PLATFORM(GTK)
#include <locale.h>
#endif
#if HAVE(READLINE)
// readline/history.h has a Function typedef which conflicts with the WTF::Function template from WTF/Forward.h
// We #define it to something else to avoid this conflict.
#define Function ReadlineFunction
#include <readline/history.h>
#include <readline/readline.h>
#undef Function
#endif
#if COMPILER(MSVC)
#include <crtdbg.h>
#include <mmsystem.h>
#include <windows.h>
#endif
#if OS(DARWIN) && CPU(ARM_THUMB2)
#include <fenv.h>
#include <arm/arch.h>
#endif
#if OS(DARWIN)
#include <wtf/spi/darwin/ProcessMemoryFootprint.h>
#elif OS(LINUX)
#include <wtf/linux/ProcessMemoryFootprint.h>
#endif
#if OS(DARWIN) || OS(LINUX)
struct MemoryFootprint : ProcessMemoryFootprint {
MemoryFootprint(const ProcessMemoryFootprint& src)
: ProcessMemoryFootprint(src)
{
}
};
#else
struct MemoryFootprint {
uint64_t current;
uint64_t peak;
static MemoryFootprint now()
{
return { 0L, 0L };
}
static void resetPeak()
{
}
};
#endif
#if !defined(PATH_MAX)
#define PATH_MAX 4096
#endif
using namespace JSC;
namespace {
#define EXIT_EXCEPTION 3
NO_RETURN_WITH_VALUE static void jscExit(int status)
{
waitForAsynchronousDisassembly();
#if ENABLE(DFG_JIT)
if (DFG::isCrashing()) {
for (;;) {
#if OS(WINDOWS)
Sleep(1000);
#else
pause();
#endif
}
}
#endif // ENABLE(DFG_JIT)
exit(status);
}
static unsigned asyncTestPasses { 0 };
static unsigned asyncTestExpectedPasses { 0 };
}
template<typename Vector>
static bool fillBufferWithContentsOfFile(const String& fileName, Vector& buffer);
static RefPtr<Uint8Array> fillBufferWithContentsOfFile(const String& fileName);
class CommandLine;
class GlobalObject;
class Workers;
template<typename Func>
int runJSC(const CommandLine&, bool isWorker, const Func&);
static void checkException(GlobalObject*, bool isLastFile, bool hasException, JSValue, const CommandLine&, bool& success);
class Message : public ThreadSafeRefCounted<Message> {
public:
#if ENABLE(WEBASSEMBLY)
using Content = Variant<ArrayBufferContents, Ref<Wasm::MemoryHandle>>;
#else
using Content = Variant<ArrayBufferContents>;
#endif
Message(Content&&, int32_t);
~Message();
Content&& releaseContents() { return WTFMove(m_contents); }
int32_t index() const { return m_index; }
private:
Content m_contents;
int32_t m_index { 0 };
};
class Worker : public BasicRawSentinelNode<Worker> {
public:
Worker(Workers&);
~Worker();
void enqueue(const AbstractLocker&, RefPtr<Message>);
RefPtr<Message> dequeue();
static Worker& current();
private:
static ThreadSpecific<Worker*>& currentWorker();
Workers& m_workers;
Deque<RefPtr<Message>> m_messages;
};
class Workers {
WTF_MAKE_FAST_ALLOCATED;
WTF_MAKE_NONCOPYABLE(Workers);
public:
Workers();
~Workers();
template<typename Func>
void broadcast(const Func&);
void report(const String&);
String tryGetReport();
String getReport();
static Workers& singleton();
private:
friend class Worker;
Lock m_lock;
Condition m_condition;
SentinelLinkedList<Worker, BasicRawSentinelNode<Worker>> m_workers;
Deque<String> m_reports;
};
static JSC_DECLARE_HOST_FUNCTION(functionCreateGlobalObject);
static JSC_DECLARE_HOST_FUNCTION(functionCreateHeapBigInt);
#if USE(BIGINT32)
static JSC_DECLARE_HOST_FUNCTION(functionCreateBigInt32);
#endif
static JSC_DECLARE_HOST_FUNCTION(functionUseBigInt32);
static JSC_DECLARE_HOST_FUNCTION(functionIsBigInt32);
static JSC_DECLARE_HOST_FUNCTION(functionIsHeapBigInt);
static JSC_DECLARE_HOST_FUNCTION(functionPrintStdOut);
static JSC_DECLARE_HOST_FUNCTION(functionPrintStdErr);
static JSC_DECLARE_HOST_FUNCTION(functionDebug);
static JSC_DECLARE_HOST_FUNCTION(functionDescribe);
static JSC_DECLARE_HOST_FUNCTION(functionDescribeArray);
static JSC_DECLARE_HOST_FUNCTION(functionSleepSeconds);
static JSC_DECLARE_HOST_FUNCTION(functionJSCStack);
static JSC_DECLARE_HOST_FUNCTION(functionGCAndSweep);
static JSC_DECLARE_HOST_FUNCTION(functionFullGC);
static JSC_DECLARE_HOST_FUNCTION(functionEdenGC);
static JSC_DECLARE_HOST_FUNCTION(functionHeapSize);
static JSC_DECLARE_HOST_FUNCTION(functionCreateMemoryFootprint);
static JSC_DECLARE_HOST_FUNCTION(functionResetMemoryPeak);
static JSC_DECLARE_HOST_FUNCTION(functionAddressOf);
static JSC_DECLARE_HOST_FUNCTION(functionVersion);
static JSC_DECLARE_HOST_FUNCTION(functionRun);
static JSC_DECLARE_HOST_FUNCTION(functionRunString);
static JSC_DECLARE_HOST_FUNCTION(functionLoad);
static JSC_DECLARE_HOST_FUNCTION(functionLoadString);
static JSC_DECLARE_HOST_FUNCTION(functionReadFile);
static JSC_DECLARE_HOST_FUNCTION(functionCheckSyntax);
static JSC_DECLARE_HOST_FUNCTION(functionReadline);
static JSC_DECLARE_HOST_FUNCTION(functionPreciseTime);
static JSC_DECLARE_HOST_FUNCTION(functionNeverInlineFunction);
static JSC_DECLARE_HOST_FUNCTION(functionNoDFG);
static JSC_DECLARE_HOST_FUNCTION(functionNoFTL);
static JSC_DECLARE_HOST_FUNCTION(functionNoOSRExitFuzzing);
static JSC_DECLARE_HOST_FUNCTION(functionOptimizeNextInvocation);
static JSC_DECLARE_HOST_FUNCTION(functionNumberOfDFGCompiles);
static JSC_DECLARE_HOST_FUNCTION(functionCallerIsOMGCompiled);
static JSC_DECLARE_HOST_FUNCTION(functionJSCOptions);
static JSC_DECLARE_HOST_FUNCTION(functionReoptimizationRetryCount);
static JSC_DECLARE_HOST_FUNCTION(functionTransferArrayBuffer);
static JSC_DECLARE_HOST_FUNCTION(functionFailNextNewCodeBlock);
static NO_RETURN_WITH_VALUE JSC_DECLARE_HOST_FUNCTION(functionQuit);
static JSC_DECLARE_HOST_FUNCTION(functionFalse);
static JSC_DECLARE_HOST_FUNCTION(functionUndefined1);
static JSC_DECLARE_HOST_FUNCTION(functionUndefined2);
static JSC_DECLARE_HOST_FUNCTION(functionIsInt32);
static JSC_DECLARE_HOST_FUNCTION(functionIsPureNaN);
static JSC_DECLARE_HOST_FUNCTION(functionEffectful42);
static JSC_DECLARE_HOST_FUNCTION(functionIdentity);
static JSC_DECLARE_HOST_FUNCTION(functionMakeMasquerader);
static JSC_DECLARE_HOST_FUNCTION(functionCallMasquerader);
static JSC_DECLARE_HOST_FUNCTION(functionHasCustomProperties);
static JSC_DECLARE_HOST_FUNCTION(functionDumpTypesForAllVariables);
static JSC_DECLARE_HOST_FUNCTION(functionDrainMicrotasks);
static JSC_DECLARE_HOST_FUNCTION(functionSetTimeout);
static JSC_DECLARE_HOST_FUNCTION(functionReleaseWeakRefs);
static JSC_DECLARE_HOST_FUNCTION(functionFinalizationRegistryLiveCount);
static JSC_DECLARE_HOST_FUNCTION(functionFinalizationRegistryDeadCount);
static JSC_DECLARE_HOST_FUNCTION(functionIs32BitPlatform);
static JSC_DECLARE_HOST_FUNCTION(functionCheckModuleSyntax);
static JSC_DECLARE_HOST_FUNCTION(functionPlatformSupportsSamplingProfiler);
static JSC_DECLARE_HOST_FUNCTION(functionGenerateHeapSnapshot);
static JSC_DECLARE_HOST_FUNCTION(functionGenerateHeapSnapshotForGCDebugging);
static JSC_DECLARE_HOST_FUNCTION(functionResetSuperSamplerState);
static JSC_DECLARE_HOST_FUNCTION(functionEnsureArrayStorage);
#if ENABLE(SAMPLING_PROFILER)
static JSC_DECLARE_HOST_FUNCTION(functionStartSamplingProfiler);
static JSC_DECLARE_HOST_FUNCTION(functionSamplingProfilerStackTraces);
#endif
static JSC_DECLARE_HOST_FUNCTION(functionMaxArguments);
static JSC_DECLARE_HOST_FUNCTION(functionAsyncTestStart);
static JSC_DECLARE_HOST_FUNCTION(functionAsyncTestPassed);
#if ENABLE(WEBASSEMBLY)
static JSC_DECLARE_HOST_FUNCTION(functionWebAssemblyMemoryMode);
#endif
#if ENABLE(SAMPLING_FLAGS)
static JSC_DECLARE_HOST_FUNCTION(functionSetSamplingFlags);
static JSC_DECLARE_HOST_FUNCTION(functionClearSamplingFlags);
#endif
static JSC_DECLARE_HOST_FUNCTION(functionGetRandomSeed);
static JSC_DECLARE_HOST_FUNCTION(functionSetRandomSeed);
static JSC_DECLARE_HOST_FUNCTION(functionIsRope);
static JSC_DECLARE_HOST_FUNCTION(functionCallerSourceOrigin);
static JSC_DECLARE_HOST_FUNCTION(functionDollarCreateRealm);
static JSC_DECLARE_HOST_FUNCTION(functionDollarEvalScript);
static JSC_DECLARE_HOST_FUNCTION(functionDollarAgentStart);
static JSC_DECLARE_HOST_FUNCTION(functionDollarAgentReceiveBroadcast);
static JSC_DECLARE_HOST_FUNCTION(functionDollarAgentReport);
static JSC_DECLARE_HOST_FUNCTION(functionDollarAgentSleep);
static JSC_DECLARE_HOST_FUNCTION(functionDollarAgentBroadcast);
static JSC_DECLARE_HOST_FUNCTION(functionDollarAgentGetReport);
static JSC_DECLARE_HOST_FUNCTION(functionDollarAgentLeaving);
static JSC_DECLARE_HOST_FUNCTION(functionDollarAgentMonotonicNow);
static JSC_DECLARE_HOST_FUNCTION(functionWaitForReport);
static JSC_DECLARE_HOST_FUNCTION(functionHeapCapacity);
static JSC_DECLARE_HOST_FUNCTION(functionFlashHeapAccess);
static JSC_DECLARE_HOST_FUNCTION(functionDisableRichSourceInfo);
static JSC_DECLARE_HOST_FUNCTION(functionMallocInALoop);
static JSC_DECLARE_HOST_FUNCTION(functionTotalCompileTime);
static JSC_DECLARE_HOST_FUNCTION(functionSetUnhandledRejectionCallback);
static JSC_DECLARE_HOST_FUNCTION(functionAsDoubleNumber);
static JSC_DECLARE_HOST_FUNCTION(functionDropAllLocks);
struct Script {
enum class StrictMode {
Strict,
Sloppy
};
enum class ScriptType {
Script,
Module
};
enum class CodeSource {
File,
CommandLine
};
StrictMode strictMode;
CodeSource codeSource;
ScriptType scriptType;
char* argument;
Script(StrictMode strictMode, CodeSource codeSource, ScriptType scriptType, char *argument)
: strictMode(strictMode)
, codeSource(codeSource)
, scriptType(scriptType)
, argument(argument)
{
if (strictMode == StrictMode::Strict)
ASSERT(codeSource == CodeSource::File);
}
};
class CommandLine {
public:
CommandLine(int argc, char** argv)
{
parseArguments(argc, argv);
}
enum CommandLineForWorkersTag { CommandLineForWorkers };
CommandLine(CommandLineForWorkersTag)
{
}
Vector<Script> m_scripts;
Vector<String> m_arguments;
String m_profilerOutput;
String m_uncaughtExceptionName;
bool m_interactive { false };
bool m_dump { false };
bool m_module { false };
bool m_exitCode { false };
bool m_destroyVM { false };
bool m_profile { false };
bool m_treatWatchdogExceptionAsSuccess { false };
bool m_alwaysDumpUncaughtException { false };
bool m_dumpMemoryFootprint { false };
bool m_dumpSamplingProfilerData { false };
bool m_enableRemoteDebugging { false };
bool m_canBlockIsFalse { false };
void parseArguments(int, char**);
};
static const char interactivePrompt[] = ">>> ";
class StopWatch {
public:
void start();
void stop();
long getElapsedMS(); // call stop() first
private:
MonotonicTime m_startTime;
MonotonicTime m_stopTime;
};
void StopWatch::start()
{
m_startTime = MonotonicTime::now();
}
void StopWatch::stop()
{
m_stopTime = MonotonicTime::now();
}
long StopWatch::getElapsedMS()
{
return (m_stopTime - m_startTime).millisecondsAs<long>();
}
template<typename Vector>
static inline String stringFromUTF(const Vector& utf8)
{
return String::fromUTF8WithLatin1Fallback(utf8.data(), utf8.size());
}
static JSC_DECLARE_CUSTOM_GETTER(accessorMakeMasquerader);
static JSC_DECLARE_CUSTOM_SETTER(testCustomAccessorSetter);
static JSC_DECLARE_CUSTOM_SETTER(testCustomValueSetter);
JSC_DEFINE_CUSTOM_GETTER(accessorMakeMasquerader, (JSGlobalObject* globalObject, EncodedJSValue, PropertyName))
{
VM& vm = globalObject->vm();
return JSValue::encode(InternalFunction::createFunctionThatMasqueradesAsUndefined(vm, globalObject, 0, "IsHTMLDDA"_s, functionCallMasquerader));
}
class GlobalObject final : public JSGlobalObject {
public:
using Base = JSGlobalObject;
static GlobalObject* create(VM& vm, Structure* structure, const Vector<String>& arguments)
{
GlobalObject* object = new (NotNull, allocateCell<GlobalObject>(vm.heap)) GlobalObject(vm, structure);
object->finishCreation(vm, arguments);
return object;
}
DECLARE_INFO;
static const GlobalObjectMethodTable s_globalObjectMethodTable;
static Structure* createStructure(VM& vm, JSValue prototype)
{
return Structure::create(vm, nullptr, prototype, TypeInfo(GlobalObjectType, StructureFlags), info());
}
static RuntimeFlags javaScriptRuntimeFlags(const JSGlobalObject*) { return RuntimeFlags::createAllEnabled(); }
private:
GlobalObject(VM&, Structure*);
static constexpr unsigned DontEnum = 0 | PropertyAttribute::DontEnum;
void finishCreation(VM& vm, const Vector<String>& arguments)
{
Base::finishCreation(vm);
JSC_TO_STRING_TAG_WITHOUT_TRANSITION();
addFunction(vm, "debug", functionDebug, 1);
addFunction(vm, "describe", functionDescribe, 1);
addFunction(vm, "describeArray", functionDescribeArray, 1);
addFunction(vm, "print", functionPrintStdOut, 1);
addFunction(vm, "printErr", functionPrintStdErr, 1);
addFunction(vm, "quit", functionQuit, 0);
addFunction(vm, "gc", functionGCAndSweep, 0);
addFunction(vm, "fullGC", functionFullGC, 0);
addFunction(vm, "edenGC", functionEdenGC, 0);
addFunction(vm, "gcHeapSize", functionHeapSize, 0);
addFunction(vm, "MemoryFootprint", functionCreateMemoryFootprint, 0);
addFunction(vm, "resetMemoryPeak", functionResetMemoryPeak, 0);
addFunction(vm, "addressOf", functionAddressOf, 1);
addFunction(vm, "version", functionVersion, 1);
addFunction(vm, "run", functionRun, 1);
addFunction(vm, "runString", functionRunString, 1);
addFunction(vm, "load", functionLoad, 1);
addFunction(vm, "loadString", functionLoadString, 1);
addFunction(vm, "readFile", functionReadFile, 2);
addFunction(vm, "read", functionReadFile, 2);
addFunction(vm, "checkSyntax", functionCheckSyntax, 1);
addFunction(vm, "sleepSeconds", functionSleepSeconds, 1);
addFunction(vm, "jscStack", functionJSCStack, 1);
addFunction(vm, "readline", functionReadline, 0);
addFunction(vm, "preciseTime", functionPreciseTime, 0);
addFunction(vm, "neverInlineFunction", functionNeverInlineFunction, 1);
addFunction(vm, "noInline", functionNeverInlineFunction, 1);
addFunction(vm, "noDFG", functionNoDFG, 1);
addFunction(vm, "noFTL", functionNoFTL, 1);
addFunction(vm, "noOSRExitFuzzing", functionNoOSRExitFuzzing, 1);
addFunction(vm, "numberOfDFGCompiles", functionNumberOfDFGCompiles, 1);
addFunction(vm, "callerIsOMGCompiled", functionCallerIsOMGCompiled, 0);
addFunction(vm, "jscOptions", functionJSCOptions, 0);
addFunction(vm, "optimizeNextInvocation", functionOptimizeNextInvocation, 1);
addFunction(vm, "reoptimizationRetryCount", functionReoptimizationRetryCount, 1);
addFunction(vm, "transferArrayBuffer", functionTransferArrayBuffer, 1);
addFunction(vm, "failNextNewCodeBlock", functionFailNextNewCodeBlock, 1);
#if ENABLE(SAMPLING_FLAGS)
addFunction(vm, "setSamplingFlags", functionSetSamplingFlags, 1);
addFunction(vm, "clearSamplingFlags", functionClearSamplingFlags, 1);
#endif
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "OSRExit"), 0, functionUndefined1, OSRExitIntrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "isFinalTier"), 0, functionFalse, IsFinalTierIntrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "predictInt32"), 0, functionUndefined2, SetInt32HeapPredictionIntrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "isInt32"), 0, functionIsInt32, CheckInt32Intrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "isPureNaN"), 0, functionIsPureNaN, CheckInt32Intrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "fiatInt52"), 0, functionIdentity, FiatInt52Intrinsic, DontEnum);
addFunction(vm, "effectful42", functionEffectful42, 0);
addFunction(vm, "makeMasquerader", functionMakeMasquerader, 0);
addFunction(vm, "hasCustomProperties", functionHasCustomProperties, 0);
addFunction(vm, "createGlobalObject", functionCreateGlobalObject, 0);
addFunction(vm, "createHeapBigInt", functionCreateHeapBigInt, 1);
#if USE(BIGINT32)
addFunction(vm, "createBigInt32", functionCreateBigInt32, 1);
#endif
addFunction(vm, "useBigInt32", functionUseBigInt32, 0);
addFunction(vm, "isBigInt32", functionIsBigInt32, 1);
addFunction(vm, "isHeapBigInt", functionIsHeapBigInt, 1);
addFunction(vm, "dumpTypesForAllVariables", functionDumpTypesForAllVariables , 0);
addFunction(vm, "drainMicrotasks", functionDrainMicrotasks, 0);
addFunction(vm, "setTimeout", functionSetTimeout, 2);
addFunction(vm, "releaseWeakRefs", functionReleaseWeakRefs, 0);
addFunction(vm, "finalizationRegistryLiveCount", functionFinalizationRegistryLiveCount, 0);
addFunction(vm, "finalizationRegistryDeadCount", functionFinalizationRegistryDeadCount, 0);
addFunction(vm, "getRandomSeed", functionGetRandomSeed, 0);
addFunction(vm, "setRandomSeed", functionSetRandomSeed, 1);
addFunction(vm, "isRope", functionIsRope, 1);
addFunction(vm, "callerSourceOrigin", functionCallerSourceOrigin, 0);
addFunction(vm, "is32BitPlatform", functionIs32BitPlatform, 0);
addFunction(vm, "checkModuleSyntax", functionCheckModuleSyntax, 1);
addFunction(vm, "platformSupportsSamplingProfiler", functionPlatformSupportsSamplingProfiler, 0);
addFunction(vm, "generateHeapSnapshot", functionGenerateHeapSnapshot, 0);
addFunction(vm, "generateHeapSnapshotForGCDebugging", functionGenerateHeapSnapshotForGCDebugging, 0);
addFunction(vm, "resetSuperSamplerState", functionResetSuperSamplerState, 0);
addFunction(vm, "ensureArrayStorage", functionEnsureArrayStorage, 0);
#if ENABLE(SAMPLING_PROFILER)
addFunction(vm, "startSamplingProfiler", functionStartSamplingProfiler, 0);
addFunction(vm, "samplingProfilerStackTraces", functionSamplingProfilerStackTraces, 0);
#endif
addFunction(vm, "maxArguments", functionMaxArguments, 0);
addFunction(vm, "asyncTestStart", functionAsyncTestStart, 1);
addFunction(vm, "asyncTestPassed", functionAsyncTestPassed, 1);
#if ENABLE(WEBASSEMBLY)
addFunction(vm, "WebAssemblyMemoryMode", functionWebAssemblyMemoryMode, 1);
#endif
if (!arguments.isEmpty()) {
JSArray* array = constructEmptyArray(this, nullptr);
for (size_t i = 0; i < arguments.size(); ++i)
array->putDirectIndex(this, i, jsString(vm, arguments[i]));
putDirect(vm, Identifier::fromString(vm, "arguments"), array, DontEnum);
}
putDirect(vm, Identifier::fromString(vm, "console"), jsUndefined(), DontEnum);
Structure* plainObjectStructure = JSFinalObject::createStructure(vm, this, objectPrototype(), 0);
JSObject* dollar = JSFinalObject::create(vm, plainObjectStructure);
putDirect(vm, Identifier::fromString(vm, "$"), dollar, DontEnum);
putDirect(vm, Identifier::fromString(vm, "$262"), dollar, DontEnum);
addFunction(vm, dollar, "createRealm", functionDollarCreateRealm, 0);
addFunction(vm, dollar, "detachArrayBuffer", functionTransferArrayBuffer, 1);
addFunction(vm, dollar, "evalScript", functionDollarEvalScript, 1);
dollar->putDirect(vm, Identifier::fromString(vm, "global"), this, DontEnum);
dollar->putDirectCustomAccessor(vm, Identifier::fromString(vm, "IsHTMLDDA"),
CustomGetterSetter::create(vm, accessorMakeMasquerader, nullptr),
static_cast<unsigned>(PropertyAttribute::CustomValue)
);
JSObject* agent = JSFinalObject::create(vm, plainObjectStructure);
dollar->putDirect(vm, Identifier::fromString(vm, "agent"), agent, DontEnum);
// The test262 INTERPRETING.md document says that some of these functions are just in the main
// thread and some are in the other threads. We just put them in all threads.
addFunction(vm, agent, "start", functionDollarAgentStart, 1);
addFunction(vm, agent, "receiveBroadcast", functionDollarAgentReceiveBroadcast, 1);
addFunction(vm, agent, "report", functionDollarAgentReport, 1);
addFunction(vm, agent, "sleep", functionDollarAgentSleep, 1);
addFunction(vm, agent, "broadcast", functionDollarAgentBroadcast, 1);
addFunction(vm, agent, "getReport", functionDollarAgentGetReport, 0);
addFunction(vm, agent, "leaving", functionDollarAgentLeaving, 0);
addFunction(vm, agent, "monotonicNow", functionDollarAgentMonotonicNow, 0);
addFunction(vm, "waitForReport", functionWaitForReport, 0);
addFunction(vm, "heapCapacity", functionHeapCapacity, 0);
addFunction(vm, "flashHeapAccess", functionFlashHeapAccess, 0);
addFunction(vm, "disableRichSourceInfo", functionDisableRichSourceInfo, 0);
addFunction(vm, "mallocInALoop", functionMallocInALoop, 0);
addFunction(vm, "totalCompileTime", functionTotalCompileTime, 0);
addFunction(vm, "setUnhandledRejectionCallback", functionSetUnhandledRejectionCallback, 1);
addFunction(vm, "asDoubleNumber", functionAsDoubleNumber, 1);
addFunction(vm, "dropAllLocks", functionDropAllLocks, 1);
if (Options::exposeCustomSettersOnGlobalObjectForTesting()) {
{
CustomGetterSetter* custom = CustomGetterSetter::create(vm, nullptr, testCustomAccessorSetter);
Identifier identifier = Identifier::fromString(vm, "testCustomAccessorSetter");
this->putDirectCustomAccessor(vm, identifier, custom, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::CustomAccessor);
}
{
CustomGetterSetter* custom = CustomGetterSetter::create(vm, nullptr, testCustomValueSetter);
Identifier identifier = Identifier::fromString(vm, "testCustomValueSetter");
this->putDirectCustomAccessor(vm, identifier, custom, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::CustomValue);
}
}
}
public:
static bool testCustomSetterImpl(JSGlobalObject* lexicalGlobalObject, GlobalObject* thisObject, EncodedJSValue encodedValue, const char* propertyName)
{
VM& vm = lexicalGlobalObject->vm();
Identifier identifier = Identifier::fromString(vm, propertyName);
thisObject->putDirect(vm, identifier, JSValue::decode(encodedValue), DontEnum);
return true;
}
private:
void addFunction(VM& vm, JSObject* object, const char* name, NativeFunction function, unsigned arguments)
{
Identifier identifier = Identifier::fromString(vm, name);
object->putDirect(vm, identifier, JSFunction::create(vm, this, arguments, identifier.string(), function), DontEnum);
}
void addFunction(VM& vm, const char* name, NativeFunction function, unsigned arguments)
{
addFunction(vm, this, name, function, arguments);
}
static JSInternalPromise* moduleLoaderImportModule(JSGlobalObject*, JSModuleLoader*, JSString*, JSValue, const SourceOrigin&);
static Identifier moduleLoaderResolve(JSGlobalObject*, JSModuleLoader*, JSValue, JSValue, JSValue);
static JSInternalPromise* moduleLoaderFetch(JSGlobalObject*, JSModuleLoader*, JSValue, JSValue, JSValue);
static JSObject* moduleLoaderCreateImportMetaProperties(JSGlobalObject*, JSModuleLoader*, JSValue, JSModuleRecord*, JSValue);
static void reportUncaughtExceptionAtEventLoop(JSGlobalObject*, Exception*);
};
STATIC_ASSERT_ISO_SUBSPACE_SHARABLE(GlobalObject, JSGlobalObject);
static bool supportsRichSourceInfo = true;
static bool shellSupportsRichSourceInfo(const JSGlobalObject*)
{
return supportsRichSourceInfo;
}
const ClassInfo GlobalObject::s_info = { "global", &JSGlobalObject::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(GlobalObject) };
const GlobalObjectMethodTable GlobalObject::s_globalObjectMethodTable = {
&shellSupportsRichSourceInfo,
&shouldInterruptScript,
&javaScriptRuntimeFlags,
nullptr, // queueTaskToEventLoop
&shouldInterruptScriptBeforeTimeout,
&moduleLoaderImportModule,
&moduleLoaderResolve,
&moduleLoaderFetch,
&moduleLoaderCreateImportMetaProperties,
nullptr, // moduleLoaderEvaluate
nullptr, // promiseRejectionTracker
&reportUncaughtExceptionAtEventLoop,
&currentScriptExecutionOwner,
&scriptExecutionStatus,
nullptr, // defaultLanguage
nullptr, // compileStreaming
nullptr, // instantinateStreaming
};
GlobalObject::GlobalObject(VM& vm, Structure* structure)
: JSGlobalObject(vm, structure, &s_globalObjectMethodTable)
{
}
JSC_DEFINE_CUSTOM_SETTER(testCustomAccessorSetter, (JSGlobalObject* lexicalGlobalObject, EncodedJSValue thisValue, EncodedJSValue encodedValue))
{
VM& vm = lexicalGlobalObject->vm();
RELEASE_ASSERT(JSValue::decode(thisValue).isCell());
JSCell* thisCell = JSValue::decode(thisValue).asCell();
RELEASE_ASSERT(thisCell->type() == PureForwardingProxyType);
GlobalObject* thisObject = jsDynamicCast<GlobalObject*>(vm, jsCast<JSProxy*>(thisCell)->target());
RELEASE_ASSERT(thisObject);
return GlobalObject::testCustomSetterImpl(lexicalGlobalObject, thisObject, encodedValue, "_testCustomAccessorSetter");
}
JSC_DEFINE_CUSTOM_SETTER(testCustomValueSetter, (JSGlobalObject* lexicalGlobalObject, EncodedJSValue thisValue, EncodedJSValue encodedValue))
{
VM& vm = lexicalGlobalObject->vm();
RELEASE_ASSERT(JSValue::decode(thisValue).isCell());
JSCell* thisCell = JSValue::decode(thisValue).asCell();
GlobalObject* thisObject = jsDynamicCast<GlobalObject*>(vm, thisCell);
RELEASE_ASSERT(thisObject);
return GlobalObject::testCustomSetterImpl(lexicalGlobalObject, thisObject, encodedValue, "_testCustomValueSetter");
}
static UChar pathSeparator()
{
#if OS(WINDOWS)
return '\\';
#else
return '/';
#endif
}
static URL currentWorkingDirectory()
{
#if OS(WINDOWS)
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364934.aspx
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247.aspx#maxpath
// The _MAX_PATH in Windows is 260. If the path of the current working directory is longer than that, _getcwd truncates the result.
// And other I/O functions taking a path name also truncate it. To avoid this situation,
//
// (1). When opening the file in Windows for modules, we always use the abosolute path and add "\\?\" prefix to the path name.
// (2). When retrieving the current working directory, use GetCurrentDirectory instead of _getcwd.
//
// In the path utility functions inside the JSC shell, we does not handle the UNC and UNCW including the network host name.
DWORD bufferLength = ::GetCurrentDirectoryW(0, nullptr);
if (!bufferLength)
return { };
// In Windows, wchar_t is the UTF-16LE.
// https://msdn.microsoft.com/en-us/library/dd374081.aspx
// https://msdn.microsoft.com/en-us/library/windows/desktop/ff381407.aspx
Vector<wchar_t> buffer(bufferLength);
DWORD lengthNotIncludingNull = ::GetCurrentDirectoryW(bufferLength, buffer.data());
String directoryString(buffer.data(), lengthNotIncludingNull);
// We don't support network path like \\host\share\<path name>.
if (directoryString.startsWith("\\\\"))
return { };
#else
Vector<char> buffer(PATH_MAX);
if (!getcwd(buffer.data(), PATH_MAX))
return { };
String directoryString = String::fromUTF8(buffer.data());
#endif
if (directoryString.isEmpty())
return { };
// Add a trailing slash if needed so the URL resolves to a directory and not a file.
if (directoryString[directoryString.length() - 1] != pathSeparator())
directoryString = makeString(directoryString, pathSeparator());
return URL::fileURLWithFileSystemPath(directoryString);
}
static URL absolutePath(const String& fileName)
{
auto directoryName = currentWorkingDirectory();
if (!directoryName.isValid())
return URL::fileURLWithFileSystemPath(fileName);
return URL(directoryName, fileName);
}
JSInternalPromise* GlobalObject::moduleLoaderImportModule(JSGlobalObject* globalObject, JSModuleLoader*, JSString* moduleNameValue, JSValue parameters, const SourceOrigin& sourceOrigin)
{
VM& vm = globalObject->vm();
auto throwScope = DECLARE_THROW_SCOPE(vm);
auto* promise = JSInternalPromise::create(vm, globalObject->internalPromiseStructure());
auto catchScope = DECLARE_CATCH_SCOPE(vm);
auto rejectWithError = [&](JSValue error) {
promise->reject(globalObject, error);
return promise;
};
auto reject = [&](Exception* exception) {
if (UNLIKELY(isTerminatedExecutionException(vm, exception)))
return promise;
JSValue error = exception->value();
catchScope.clearException();
return rejectWithError(error);
};
auto referrer = sourceOrigin.url();
auto specifier = moduleNameValue->value(globalObject);
RETURN_IF_EXCEPTION(throwScope, nullptr);
if (UNLIKELY(catchScope.exception()))
return reject(catchScope.exception());
if (!referrer.isLocalFile())
return rejectWithError(createError(globalObject, makeString("Could not resolve the referrer's path '", referrer.string(), "', while trying to resolve module '", specifier, "'.")));
if (!specifier.startsWith('/') && !specifier.startsWith("./") && !specifier.startsWith("../"))
return rejectWithError(createTypeError(globalObject, makeString("Module specifier, '"_s, specifier, "' does not start with \"/\", \"./\", or \"../\". Referenced from: "_s, referrer.fileSystemPath())));
URL moduleURL(referrer, specifier);
if (!moduleURL.isLocalFile())
return rejectWithError(createError(globalObject, makeString("Module url, '", moduleURL.string(), "' does not map to a local file.")));
auto result = JSC::importModule(globalObject, Identifier::fromString(vm, moduleURL.string()), parameters, jsUndefined());
if (UNLIKELY(catchScope.exception()))
return reject(catchScope.exception());
return result;
}
Identifier GlobalObject::moduleLoaderResolve(JSGlobalObject* globalObject, JSModuleLoader*, JSValue keyValue, JSValue referrerValue, JSValue)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
scope.releaseAssertNoException();
const Identifier key = keyValue.toPropertyKey(globalObject);
RETURN_IF_EXCEPTION(scope, { });
if (key.isSymbol())
return key;
auto resolvePath = [&] (const URL& directoryURL) -> Identifier {
String specifier = key.impl();
if (!specifier.startsWith('/') && !specifier.startsWith("./") && !specifier.startsWith("../")) {
throwTypeError(globalObject, scope, makeString("Module specifier, '"_s, specifier, "' does not start with \"/\", \"./\", or \"../\". Referenced from: "_s, directoryURL.fileSystemPath()));
return { };
}
if (!directoryURL.isLocalFile()) {
throwException(globalObject, scope, createError(globalObject, makeString("Could not resolve the referrer's path: ", directoryURL.string())));
return { };
}
URL resolvedURL(directoryURL, specifier);
if (!resolvedURL.isValid()) {
throwException(globalObject, scope, createError(globalObject, makeString("Resolved module url is not valid: ", resolvedURL.string())));
return { };
}
ASSERT(resolvedURL.isLocalFile());
return Identifier::fromString(vm, resolvedURL.string());
};
if (referrerValue.isUndefined())
return resolvePath(currentWorkingDirectory());
const Identifier referrer = referrerValue.toPropertyKey(globalObject);
RETURN_IF_EXCEPTION(scope, { });
if (referrer.isSymbol())
return resolvePath(currentWorkingDirectory());
// If the referrer exists, we assume that the referrer is the correct file url.
URL url = URL({ }, referrer.impl());
ASSERT(url.isLocalFile());
return resolvePath(url);
}
template<typename Vector>
static void convertShebangToJSComment(Vector& buffer)
{
if (buffer.size() >= 2) {
if (buffer[0] == '#' && buffer[1] == '!')
buffer[0] = buffer[1] = '/';
}
}
static RefPtr<Uint8Array> fillBufferWithContentsOfFile(FILE* file)
{
if (fseek(file, 0, SEEK_END) == -1)
return nullptr;
long bufferCapacity = ftell(file);
if (bufferCapacity == -1)
return nullptr;
if (fseek(file, 0, SEEK_SET) == -1)
return nullptr;
auto result = Uint8Array::tryCreate(bufferCapacity);
if (!result)
return nullptr;
size_t readSize = fread(result->data(), 1, bufferCapacity, file);
if (readSize != static_cast<size_t>(bufferCapacity))
return nullptr;
return result;
}
static RefPtr<Uint8Array> fillBufferWithContentsOfFile(const String& fileName)
{
FILE* f = fopen(fileName.utf8().data(), "rb");
if (!f) {
fprintf(stderr, "Could not open file: %s\n", fileName.utf8().data());
return nullptr;
}
RefPtr<Uint8Array> result = fillBufferWithContentsOfFile(f);
fclose(f);
return result;
}
template<typename Vector>
static bool fillBufferWithContentsOfFile(FILE* file, Vector& buffer)
{
// We might have injected "use strict"; at the top.
size_t initialSize = buffer.size();
if (fseek(file, 0, SEEK_END) == -1)
return false;
long bufferCapacity = ftell(file);
if (bufferCapacity == -1)
return false;
if (fseek(file, 0, SEEK_SET) == -1)
return false;
buffer.resize(bufferCapacity + initialSize);
size_t readSize = fread(buffer.data() + initialSize, 1, buffer.size(), file);
return readSize == buffer.size() - initialSize;
}
static bool fillBufferWithContentsOfFile(const String& fileName, Vector<char>& buffer)
{
FILE* f = fopen(fileName.utf8().data(), "rb");
if (!f) {
fprintf(stderr, "Could not open file: %s\n", fileName.utf8().data());
return false;
}
bool result = fillBufferWithContentsOfFile(f, buffer);
fclose(f);
return result;
}
static bool fetchScriptFromLocalFileSystem(const String& fileName, Vector<char>& buffer)
{
if (!fillBufferWithContentsOfFile(fileName, buffer))
return false;
convertShebangToJSComment(buffer);
return true;
}
class ShellSourceProvider final : public StringSourceProvider {
public:
static Ref<ShellSourceProvider> create(const String& source, const SourceOrigin& sourceOrigin, String&& sourceURL, const TextPosition& startPosition, SourceProviderSourceType sourceType)
{
return adoptRef(*new ShellSourceProvider(source, sourceOrigin, WTFMove(sourceURL), startPosition, sourceType));
}
~ShellSourceProvider() final
{
commitCachedBytecode();
}
RefPtr<CachedBytecode> cachedBytecode() const final
{
if (!m_cachedBytecode)
loadBytecode();
return m_cachedBytecode.copyRef();
}
void updateCache(const UnlinkedFunctionExecutable* executable, const SourceCode&, CodeSpecializationKind kind, const UnlinkedFunctionCodeBlock* codeBlock) const final
{
if (!cacheEnabled() || !m_cachedBytecode)
return;
BytecodeCacheError error;
RefPtr<CachedBytecode> cachedBytecode = encodeFunctionCodeBlock(executable->vm(), codeBlock, error);
if (cachedBytecode && !error.isValid())
m_cachedBytecode->addFunctionUpdate(executable, kind, *cachedBytecode);
}
void cacheBytecode(const BytecodeCacheGenerator& generator) const final
{
if (!cacheEnabled())
return;
if (!m_cachedBytecode)
m_cachedBytecode = CachedBytecode::create();
auto update = generator();
if (update)
m_cachedBytecode->addGlobalUpdate(*update);
}
void commitCachedBytecode() const final
{
if (!cacheEnabled() || !m_cachedBytecode || !m_cachedBytecode->hasUpdates())
return;
auto clearBytecode = makeScopeExit([&] {
m_cachedBytecode = nullptr;
});
String filename = cachePath();
auto fd = FileSystem::openAndLockFile(filename, FileSystem::FileOpenMode::Write, {FileSystem::FileLockMode::Exclusive, FileSystem::FileLockMode::Nonblocking});
if (!FileSystem::isHandleValid(fd))
return;
auto closeFD = makeScopeExit([&] {
FileSystem::unlockAndCloseFile(fd);
});
long long fileSize;
if (!FileSystem::getFileSize(fd, fileSize))
return;
size_t cacheFileSize;
if (!WTF::convertSafely(fileSize, cacheFileSize) || cacheFileSize != m_cachedBytecode->size()) {
// The bytecode cache has already been updated
return;
}
if (!FileSystem::truncateFile(fd, m_cachedBytecode->sizeForUpdate()))
return;
m_cachedBytecode->commitUpdates([&] (off_t offset, const void* data, size_t size) {
long long result = FileSystem::seekFile(fd, offset, FileSystem::FileSeekOrigin::Beginning);
ASSERT_UNUSED(result, result != -1);
size_t bytesWritten = static_cast<size_t>(FileSystem::writeToFile(fd, static_cast<const char*>(data), size));
ASSERT_UNUSED(bytesWritten, bytesWritten == size);
});
}
private:
String cachePath() const
{
if (!cacheEnabled())
return static_cast<const char*>(nullptr);
const char* cachePath = Options::diskCachePath();
String filename = FileSystem::encodeForFileName(FileSystem::lastComponentOfPathIgnoringTrailingSlash(sourceOrigin().url().fileSystemPath()));
return FileSystem::pathByAppendingComponent(cachePath, makeString(source().toString().hash(), '-', filename, ".bytecode-cache"));
}
void loadBytecode() const
{
if (!cacheEnabled())
return;
String filename = cachePath();
if (filename.isNull())
return;
auto fd = FileSystem::openAndLockFile(filename, FileSystem::FileOpenMode::Read, {FileSystem::FileLockMode::Shared, FileSystem::FileLockMode::Nonblocking});
if (!FileSystem::isHandleValid(fd))
return;
auto closeFD = makeScopeExit([&] {
FileSystem::unlockAndCloseFile(fd);
});
bool success;
FileSystem::MappedFileData mappedFileData(fd, FileSystem::MappedFileMode::Private, success);
if (!success)
return;
m_cachedBytecode = CachedBytecode::create(WTFMove(mappedFileData));
}
ShellSourceProvider(const String& source, const SourceOrigin& sourceOrigin, String&& sourceURL, const TextPosition& startPosition, SourceProviderSourceType sourceType)
: StringSourceProvider(source, sourceOrigin, WTFMove(sourceURL), startPosition, sourceType)
{
}
static bool cacheEnabled()
{
static bool enabled = !!Options::diskCachePath();
return enabled;
}
mutable RefPtr<CachedBytecode> m_cachedBytecode;
};
static inline SourceCode jscSource(const String& source, const SourceOrigin& sourceOrigin, String sourceURL = String(), const TextPosition& startPosition = TextPosition(), SourceProviderSourceType sourceType = SourceProviderSourceType::Program)
{
return SourceCode(ShellSourceProvider::create(source, sourceOrigin, WTFMove(sourceURL), startPosition, sourceType), startPosition.m_line.oneBasedInt(), startPosition.m_column.oneBasedInt());
}
template<typename Vector>
static inline SourceCode jscSource(const Vector& utf8, const SourceOrigin& sourceOrigin, const String& filename)
{
// FIXME: This should use an absolute file URL https://bugs.webkit.org/show_bug.cgi?id=193077
String str = stringFromUTF(utf8);
return jscSource(str, sourceOrigin, filename);
}
template<typename Vector>
static bool fetchModuleFromLocalFileSystem(const URL& fileURL, Vector& buffer)
{
String fileName = fileURL.fileSystemPath();
#if OS(WINDOWS)
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247.aspx#maxpath
// Use long UNC to pass the long path name to the Windows APIs.
auto pathName = makeString("\\\\?\\", fileName).wideCharacters();
struct _stat status { };
if (_wstat(pathName.data(), &status))
return false;
if ((status.st_mode & S_IFMT) != S_IFREG)
return false;
FILE* f = _wfopen(pathName.data(), L"rb");
#else
auto pathName = fileName.utf8();
struct stat status { };
if (stat(pathName.data(), &status))
return false;
if ((status.st_mode & S_IFMT) != S_IFREG)
return false;
FILE* f = fopen(pathName.data(), "r");
#endif
if (!f) {
fprintf(stderr, "Could not open file: %s\n", fileName.utf8().data());
return false;
}
bool result = fillBufferWithContentsOfFile(f, buffer);
if (result)
convertShebangToJSComment(buffer);
fclose(f);
return result;
}
JSInternalPromise* GlobalObject::moduleLoaderFetch(JSGlobalObject* globalObject, JSModuleLoader*, JSValue key, JSValue, JSValue)
{
VM& vm = globalObject->vm();
JSInternalPromise* promise = JSInternalPromise::create(vm, globalObject->internalPromiseStructure());
auto catchScope = DECLARE_CATCH_SCOPE(vm);
auto rejectWithError = [&](JSValue error) {
promise->reject(globalObject, error);
return promise;
};
auto reject = [&](Exception* exception) {
if (UNLIKELY(isTerminatedExecutionException(vm, exception)))
return promise;
JSValue error = exception->value();
catchScope.clearException();
return rejectWithError(error);
};
String moduleKey = key.toWTFString(globalObject);
if (UNLIKELY(catchScope.exception()))
return reject(catchScope.exception());
URL moduleURL({ }, moduleKey);
ASSERT(moduleURL.isLocalFile());
// Strip the URI from our key so Errors print canonical system paths.
moduleKey = moduleURL.fileSystemPath();
Vector<uint8_t> buffer;
if (!fetchModuleFromLocalFileSystem(moduleURL, buffer))
return rejectWithError(createError(globalObject, makeString("Could not open file '", moduleKey, "'.")));
#if ENABLE(WEBASSEMBLY)
// FileSystem does not have mime-type header. The JSC shell recognizes WebAssembly's magic header.
if (buffer.size() >= 4) {
if (buffer[0] == '\0' && buffer[1] == 'a' && buffer[2] == 's' && buffer[3] == 'm') {
auto source = SourceCode(WebAssemblySourceProvider::create(WTFMove(buffer), SourceOrigin { moduleURL }, WTFMove(moduleKey)));
catchScope.releaseAssertNoException();
auto sourceCode = JSSourceCode::create(vm, WTFMove(source));
catchScope.releaseAssertNoException();
promise->resolve(globalObject, sourceCode);
return promise;
}
}
#endif
auto sourceCode = JSSourceCode::create(vm, jscSource(stringFromUTF(buffer), SourceOrigin { moduleURL }, WTFMove(moduleKey), TextPosition(), SourceProviderSourceType::Module));
catchScope.releaseAssertNoException();
promise->resolve(globalObject, sourceCode);
return promise;
}
JSObject* GlobalObject::moduleLoaderCreateImportMetaProperties(JSGlobalObject* globalObject, JSModuleLoader*, JSValue key, JSModuleRecord*, JSValue)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSObject* metaProperties = constructEmptyObject(vm, globalObject->nullPrototypeObjectStructure());
RETURN_IF_EXCEPTION(scope, nullptr);
metaProperties->putDirect(vm, Identifier::fromString(vm, "filename"), key);
RETURN_IF_EXCEPTION(scope, nullptr);
return metaProperties;
}
static CString cStringFromViewWithString(JSGlobalObject* globalObject, ThrowScope& scope, StringViewWithUnderlyingString& viewWithString)
{
Expected<CString, UTF8ConversionError> expectedString = viewWithString.view.tryGetUtf8();
if (expectedString)
return expectedString.value();
switch (expectedString.error()) {
case UTF8ConversionError::OutOfMemory:
throwOutOfMemoryError(globalObject, scope);
break;
case UTF8ConversionError::IllegalSource:
scope.throwException(globalObject, createError(globalObject, "Illegal source encountered during UTF8 conversion"));
break;
case UTF8ConversionError::SourceExhausted:
scope.throwException(globalObject, createError(globalObject, "Source exhausted during UTF8 conversion"));
break;
default:
RELEASE_ASSERT_NOT_REACHED();
}
return { };
}
static EncodedJSValue printInternal(JSGlobalObject* globalObject, CallFrame* callFrame, FILE* out)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (asyncTestExpectedPasses) {
JSValue value = callFrame->argument(0);
if (value.isString() && WTF::equal(asString(value)->value(globalObject).impl(), "Test262:AsyncTestComplete")) {
asyncTestPasses++;
return JSValue::encode(jsUndefined());
}
}
for (unsigned i = 0; i < callFrame->argumentCount(); ++i) {
if (i)
if (EOF == fputc(' ', out))
goto fail;
auto* jsString = callFrame->uncheckedArgument(i).toString(globalObject);
RETURN_IF_EXCEPTION(scope, { });
auto viewWithString = jsString->viewWithUnderlyingString(globalObject);
RETURN_IF_EXCEPTION(scope, { });
auto string = cStringFromViewWithString(globalObject, scope, viewWithString);
RETURN_IF_EXCEPTION(scope, { });
fwrite(string.data(), sizeof(char), string.length(), out);
if (ferror(out))
goto fail;
}
fputc('\n', out);
fail:
fflush(out);
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionPrintStdOut, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return printInternal(globalObject, callFrame, stdout);
}
JSC_DEFINE_HOST_FUNCTION(functionPrintStdErr, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return printInternal(globalObject, callFrame, stderr);
}
JSC_DEFINE_HOST_FUNCTION(functionDebug, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* jsString = callFrame->argument(0).toString(globalObject);
RETURN_IF_EXCEPTION(scope, { });
auto viewWithString = jsString->viewWithUnderlyingString(globalObject);
RETURN_IF_EXCEPTION(scope, { });
auto string = cStringFromViewWithString(globalObject, scope, viewWithString);
RETURN_IF_EXCEPTION(scope, { });
fputs("--> ", stderr);
fwrite(string.data(), sizeof(char), string.length(), stderr);
fputc('\n', stderr);
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionDescribe, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
if (callFrame->argumentCount() < 1)
return JSValue::encode(jsUndefined());
return JSValue::encode(jsString(vm, toString(callFrame->argument(0))));
}
JSC_DEFINE_HOST_FUNCTION(functionDescribeArray, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
if (callFrame->argumentCount() < 1)
return JSValue::encode(jsUndefined());
VM& vm = globalObject->vm();
JSObject* object = jsDynamicCast<JSObject*>(vm, callFrame->argument(0));
if (!object)
return JSValue::encode(jsNontrivialString(vm, "<not object>"_s));
return JSValue::encode(jsNontrivialString(vm, toString("<Butterfly: ", RawPointer(object->butterfly()), "; public length: ", object->getArrayLength(), "; vector length: ", object->getVectorLength(), ">")));
}
JSC_DEFINE_HOST_FUNCTION(functionSleepSeconds, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (callFrame->argumentCount() >= 1) {
Seconds seconds = Seconds(callFrame->argument(0).toNumber(globalObject));
RETURN_IF_EXCEPTION(scope, encodedJSValue());
sleep(seconds);
}
return JSValue::encode(jsUndefined());
}
class FunctionJSCStackFunctor {
public:
FunctionJSCStackFunctor(StringBuilder& trace)
: m_trace(trace)
{
}
StackVisitor::Status operator()(StackVisitor& visitor) const
{
m_trace.append(makeString(" ", visitor->index(), " ", visitor->toString(), '\n'));
return StackVisitor::Continue;
}
private:
StringBuilder& m_trace;
};
JSC_DEFINE_HOST_FUNCTION(functionJSCStack, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
StringBuilder trace;
trace.appendLiteral("--> Stack trace:\n");
FunctionJSCStackFunctor functor(trace);
callFrame->iterate(vm, functor);
fprintf(stderr, "%s", trace.toString().utf8().data());
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionGCAndSweep, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
JSLockHolder lock(vm);
vm.heap.collectNow(Sync, CollectionScope::Full);
return JSValue::encode(jsNumber(vm.heap.sizeAfterLastFullCollection()));
}
JSC_DEFINE_HOST_FUNCTION(functionFullGC, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
JSLockHolder lock(vm);
vm.heap.collectSync(CollectionScope::Full);
return JSValue::encode(jsNumber(vm.heap.sizeAfterLastFullCollection()));
}
JSC_DEFINE_HOST_FUNCTION(functionEdenGC, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
JSLockHolder lock(vm);
vm.heap.collectSync(CollectionScope::Eden);
return JSValue::encode(jsNumber(vm.heap.sizeAfterLastEdenCollection()));
}
JSC_DEFINE_HOST_FUNCTION(functionHeapSize, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
JSLockHolder lock(vm);
return JSValue::encode(jsNumber(vm.heap.size()));
}
class JSCMemoryFootprint : public JSDestructibleObject {
using Base = JSDestructibleObject;
public:
template<typename CellType, SubspaceAccess>
static CompleteSubspace* subspaceFor(VM& vm)
{
return &vm.destructibleObjectSpace;
}
JSCMemoryFootprint(VM& vm, Structure* structure)
: Base(vm, structure)
{ }
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
static JSCMemoryFootprint* create(VM& vm, JSGlobalObject* globalObject)
{
Structure* structure = createStructure(vm, globalObject, jsNull());
JSCMemoryFootprint* footprint = new (NotNull, allocateCell<JSCMemoryFootprint>(vm.heap)) JSCMemoryFootprint(vm, structure);
footprint->finishCreation(vm);
return footprint;
}
void finishCreation(VM& vm)
{
Base::finishCreation(vm);
auto addProperty = [&] (VM& vm, const char* name, JSValue value) {
JSCMemoryFootprint::addProperty(vm, name, value);
};
MemoryFootprint footprint = MemoryFootprint::now();
addProperty(vm, "current", jsNumber(footprint.current));
addProperty(vm, "peak", jsNumber(footprint.peak));
}
DECLARE_INFO;
private:
void addProperty(VM& vm, const char* name, JSValue value)
{
Identifier identifier = Identifier::fromString(vm, name);
putDirect(vm, identifier, value);
}
};
const ClassInfo JSCMemoryFootprint::s_info = { "MemoryFootprint", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSCMemoryFootprint) };
JSC_DEFINE_HOST_FUNCTION(functionCreateMemoryFootprint, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
JSLockHolder lock(vm);
return JSValue::encode(JSCMemoryFootprint::create(vm, globalObject));
}
JSC_DEFINE_HOST_FUNCTION(functionResetMemoryPeak, (JSGlobalObject*, CallFrame*))
{
MemoryFootprint::resetPeak();
return JSValue::encode(jsUndefined());
}
// This function is not generally very helpful in 64-bit code as the tag and payload
// share a register. But in 32-bit JITed code the tag may not be checked if an
// optimization removes type checking requirements, such as in ===.
JSC_DEFINE_HOST_FUNCTION(functionAddressOf, (JSGlobalObject*, CallFrame* callFrame))
{
JSValue value = callFrame->argument(0);
if (!value.isCell())
return JSValue::encode(jsUndefined());
// Need to cast to uint64_t so bitwise_cast will play along.
uint64_t asNumber = reinterpret_cast<uint64_t>(value.asCell());
EncodedJSValue returnValue = JSValue::encode(jsNumber(bitwise_cast<double>(asNumber)));
return returnValue;
}
JSC_DEFINE_HOST_FUNCTION(functionVersion, (JSGlobalObject*, CallFrame*))
{
// We need this function for compatibility with the Mozilla JS tests but for now
// we don't actually do any version-specific handling
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionRun, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
String fileName = callFrame->argument(0).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
Vector<char> script;
if (!fetchScriptFromLocalFileSystem(fileName, script))
return JSValue::encode(throwException(globalObject, scope, createError(globalObject, "Could not open file."_s)));
GlobalObject* realm = GlobalObject::create(vm, GlobalObject::createStructure(vm, jsNull()), Vector<String>());
JSArray* array = constructEmptyArray(realm, nullptr);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
for (unsigned i = 1; i < callFrame->argumentCount(); ++i) {
array->putDirectIndex(realm, i - 1, callFrame->uncheckedArgument(i));
RETURN_IF_EXCEPTION(scope, encodedJSValue());
}
realm->putDirect(vm, Identifier::fromString(vm, "arguments"), array);
NakedPtr<Exception> exception;
StopWatch stopWatch;
stopWatch.start();
evaluate(realm, jscSource(script, SourceOrigin { absolutePath(fileName) }, fileName), JSValue(), exception);
stopWatch.stop();
if (exception) {
throwException(realm, scope, exception);
return JSValue::encode(jsUndefined());
}
return JSValue::encode(jsNumber(stopWatch.getElapsedMS()));
}
JSC_DEFINE_HOST_FUNCTION(functionRunString, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
String source = callFrame->argument(0).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
GlobalObject* realm = GlobalObject::create(vm, GlobalObject::createStructure(vm, jsNull()), Vector<String>());
JSArray* array = constructEmptyArray(realm, nullptr);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
for (unsigned i = 1; i < callFrame->argumentCount(); ++i) {
array->putDirectIndex(realm, i - 1, callFrame->uncheckedArgument(i));
RETURN_IF_EXCEPTION(scope, encodedJSValue());
}
realm->putDirect(vm, Identifier::fromString(vm, "arguments"), array);
NakedPtr<Exception> exception;
evaluate(realm, jscSource(source, callFrame->callerSourceOrigin(vm)), JSValue(), exception);
if (exception) {
scope.throwException(realm, exception);
return JSValue::encode(jsUndefined());
}
return JSValue::encode(realm);
}
JSC_DEFINE_HOST_FUNCTION(functionLoad, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
bool callerRelative = callFrame->argument(1).getString(globalObject) == "caller relative"_s;
RETURN_IF_EXCEPTION(scope, encodedJSValue());
String fileName = callFrame->argument(0).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
URL path;
if (callerRelative) {
path = URL(callFrame->callerSourceOrigin(vm).url(), fileName);
if (!path.isLocalFile())
return throwVMException(globalObject, scope, createURIError(globalObject, makeString("caller relative URL path is not a local file: ", path.string())));
} else
path = absolutePath(fileName);
Vector<char> script;
if (!fetchScriptFromLocalFileSystem(path.fileSystemPath(), script))
return JSValue::encode(throwException(globalObject, scope, createError(globalObject, "Could not open file."_s)));
NakedPtr<Exception> evaluationException;
JSValue result = evaluate(globalObject, jscSource(script, SourceOrigin { path }, fileName), JSValue(), evaluationException);
if (evaluationException)
throwException(globalObject, scope, evaluationException);
return JSValue::encode(result);
}
JSC_DEFINE_HOST_FUNCTION(functionLoadString, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
String sourceCode = callFrame->argument(0).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
NakedPtr<Exception> evaluationException;
JSValue result = evaluate(globalObject, jscSource(sourceCode, callFrame->callerSourceOrigin(vm)), JSValue(), evaluationException);
if (evaluationException)
throwException(globalObject, scope, evaluationException);
return JSValue::encode(result);
}
JSC_DEFINE_HOST_FUNCTION(functionReadFile, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
String fileName = callFrame->argument(0).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
bool isBinary = false;
if (callFrame->argumentCount() > 1) {
String type = callFrame->argument(1).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
if (type != "binary")
return throwVMError(globalObject, scope, "Expected 'binary' as second argument.");
isBinary = true;
}
RefPtr<Uint8Array> content = fillBufferWithContentsOfFile(fileName);
if (!content)
return throwVMError(globalObject, scope, "Could not open file.");
if (!isBinary)
return JSValue::encode(jsString(vm, String::fromUTF8WithLatin1Fallback(content->data(), content->length())));
Structure* structure = globalObject->typedArrayStructure(TypeUint8);
JSObject* result = JSUint8Array::create(vm, structure, WTFMove(content));
RETURN_IF_EXCEPTION(scope, encodedJSValue());
return JSValue::encode(result);
}
JSC_DEFINE_HOST_FUNCTION(functionCheckSyntax, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
String fileName = callFrame->argument(0).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
Vector<char> script;
if (!fetchScriptFromLocalFileSystem(fileName, script))
return JSValue::encode(throwException(globalObject, scope, createError(globalObject, "Could not open file."_s)));
StopWatch stopWatch;
stopWatch.start();
JSValue syntaxException;
bool validSyntax = checkSyntax(globalObject, jscSource(script, SourceOrigin { absolutePath(fileName) }, fileName), &syntaxException);
stopWatch.stop();
if (!validSyntax)
throwException(globalObject, scope, syntaxException);
return JSValue::encode(jsNumber(stopWatch.getElapsedMS()));
}
#if ENABLE(SAMPLING_FLAGS)
JSC_DEFINE_HOST_FUNCTION(functionSetSamplingFlags, (JSGlobalObject*, CallFrame* callFrame))
{
for (unsigned i = 0; i < callFrame->argumentCount(); ++i) {
unsigned flag = static_cast<unsigned>(callFrame->uncheckedArgument(i).toNumber(globalObject));
if ((flag >= 1) && (flag <= 32))
SamplingFlags::setFlag(flag);
}
return JSValue::encode(jsNull());
}
JSC_DEFINE_HOST_FUNCTION(functionClearSamplingFlags, (JSGlobalObject*, CallFrame* callFrame))
{
for (unsigned i = 0; i < callFrame->argumentCount(); ++i) {
unsigned flag = static_cast<unsigned>(callFrame->uncheckedArgument(i).toNumber(globalObject));
if ((flag >= 1) && (flag <= 32))
SamplingFlags::clearFlag(flag);
}
return JSValue::encode(jsNull());
}
#endif
JSC_DEFINE_HOST_FUNCTION(functionGetRandomSeed, (JSGlobalObject* globalObject, CallFrame*))
{
return JSValue::encode(jsNumber(globalObject->weakRandom().seed()));
}
JSC_DEFINE_HOST_FUNCTION(functionSetRandomSeed, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
unsigned seed = callFrame->argument(0).toUInt32(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
globalObject->weakRandom().setSeed(seed);
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionIsRope, (JSGlobalObject*, CallFrame* callFrame))
{
JSValue argument = callFrame->argument(0);
if (!argument.isString())
return JSValue::encode(jsBoolean(false));
const StringImpl* impl = asString(argument)->tryGetValueImpl();
return JSValue::encode(jsBoolean(!impl));
}
JSC_DEFINE_HOST_FUNCTION(functionCallerSourceOrigin, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
SourceOrigin sourceOrigin = callFrame->callerSourceOrigin(vm);
if (sourceOrigin.url().isNull())
return JSValue::encode(jsNull());
return JSValue::encode(jsString(vm, sourceOrigin.string()));
}
JSC_DEFINE_HOST_FUNCTION(functionReadline, (JSGlobalObject* globalObject, CallFrame*))
{
Vector<char, 256> line;
int c;
while ((c = getchar()) != EOF) {
// FIXME: Should we also break on \r?
if (c == '\n')
break;
line.append(c);
}
line.append('\0');
return JSValue::encode(jsString(globalObject->vm(), line.data()));
}
JSC_DEFINE_HOST_FUNCTION(functionPreciseTime, (JSGlobalObject*, CallFrame*))
{
return JSValue::encode(jsNumber(WallTime::now().secondsSinceEpoch().value()));
}
JSC_DEFINE_HOST_FUNCTION(functionNeverInlineFunction, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return JSValue::encode(setNeverInline(globalObject, callFrame));
}
JSC_DEFINE_HOST_FUNCTION(functionNoDFG, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return JSValue::encode(setNeverOptimize(globalObject, callFrame));
}
JSC_DEFINE_HOST_FUNCTION(functionNoFTL, (JSGlobalObject*, CallFrame* callFrame))
{
if (callFrame->argumentCount()) {
FunctionExecutable* executable = getExecutableForFunction(callFrame->argument(0));
if (executable)
executable->setNeverFTLOptimize(true);
}
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionNoOSRExitFuzzing, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return JSValue::encode(setCannotUseOSRExitFuzzing(globalObject, callFrame));
}
JSC_DEFINE_HOST_FUNCTION(functionOptimizeNextInvocation, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return JSValue::encode(optimizeNextInvocation(globalObject, callFrame));
}
JSC_DEFINE_HOST_FUNCTION(functionNumberOfDFGCompiles, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return JSValue::encode(numberOfDFGCompiles(globalObject, callFrame));
}
JSC_DEFINE_HOST_FUNCTION(functionCallerIsOMGCompiled, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (!Options::useBBQTierUpChecks())
return JSValue::encode(jsBoolean(true));
CallerFunctor wasmToJSFrame;
StackVisitor::visit(callFrame, vm, wasmToJSFrame);
if (!wasmToJSFrame.callerFrame()->isAnyWasmCallee())
return throwVMError(globalObject, scope, "caller is not a wasm->js import function");
// We have a wrapper frame that we generate for imports. If we ever can direct call from wasm we would need to change this.
ASSERT(!wasmToJSFrame.callerFrame()->callee().isWasm());
CallerFunctor wasmFrame;
StackVisitor::visit(wasmToJSFrame.callerFrame(), vm, wasmFrame);
ASSERT(wasmFrame.callerFrame()->callee().isWasm());
#if ENABLE(WEBASSEMBLY)
auto mode = wasmFrame.callerFrame()->callee().asWasmCallee()->compilationMode();
return JSValue::encode(jsBoolean(mode == Wasm::CompilationMode::OMGMode || mode == Wasm::CompilationMode::OMGForOSREntryMode));
#endif
RELEASE_ASSERT_NOT_REACHED();
}
Message::Message(Content&& contents, int32_t index)
: m_contents(WTFMove(contents))
, m_index(index)
{
}
Message::~Message()
{
}
Worker::Worker(Workers& workers)
: m_workers(workers)
{
auto locker = holdLock(m_workers.m_lock);
m_workers.m_workers.append(this);
*currentWorker() = this;
}
Worker::~Worker()
{
auto locker = holdLock(m_workers.m_lock);
RELEASE_ASSERT(isOnList());
remove();
}
void Worker::enqueue(const AbstractLocker&, RefPtr<Message> message)
{
m_messages.append(message);
}
RefPtr<Message> Worker::dequeue()
{
auto locker = holdLock(m_workers.m_lock);
while (m_messages.isEmpty())
m_workers.m_condition.wait(m_workers.m_lock);
return m_messages.takeFirst();
}
Worker& Worker::current()
{
return **currentWorker();
}
ThreadSpecific<Worker*>& Worker::currentWorker()
{
static ThreadSpecific<Worker*>* result;
static std::once_flag flag;
std::call_once(
flag,
[] () {
result = new ThreadSpecific<Worker*>();
});
return *result;
}
Workers::Workers()
{
}
Workers::~Workers()
{
UNREACHABLE_FOR_PLATFORM();
}
template<typename Func>
void Workers::broadcast(const Func& func)
{
auto locker = holdLock(m_lock);
for (Worker* worker = m_workers.begin(); worker != m_workers.end(); worker = worker->next()) {
if (worker != &Worker::current())
func(locker, *worker);
}
m_condition.notifyAll();
}
void Workers::report(const String& string)
{
auto locker = holdLock(m_lock);
m_reports.append(string.isolatedCopy());
m_condition.notifyAll();
}
String Workers::tryGetReport()
{
auto locker = holdLock(m_lock);
if (m_reports.isEmpty())
return String();
return m_reports.takeFirst();
}
String Workers::getReport()
{
auto locker = holdLock(m_lock);
while (m_reports.isEmpty())
m_condition.wait(m_lock);
return m_reports.takeFirst();
}
Workers& Workers::singleton()
{
static Workers* result;
static std::once_flag flag;
std::call_once(
flag,
[] {
result = new Workers();
});
return *result;
}
JSC_DEFINE_HOST_FUNCTION(functionDollarCreateRealm, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
GlobalObject* result = GlobalObject::create(vm, GlobalObject::createStructure(vm, jsNull()), Vector<String>());
return JSValue::encode(result->getDirect(vm, Identifier::fromString(vm, "$")));
}
JSC_DEFINE_HOST_FUNCTION(functionDollarEvalScript, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
String sourceCode = callFrame->argument(0).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
JSValue global = callFrame->thisValue().get(globalObject, Identifier::fromString(vm, "global"));
RETURN_IF_EXCEPTION(scope, encodedJSValue());
GlobalObject* realm = jsDynamicCast<GlobalObject*>(vm, global);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
if (!realm)
return JSValue::encode(throwException(globalObject, scope, createError(globalObject, "Expected global to point to a global object"_s)));
NakedPtr<Exception> evaluationException;
JSValue result = evaluate(realm, jscSource(sourceCode, callFrame->callerSourceOrigin(vm)), JSValue(), evaluationException);
if (evaluationException)
throwException(globalObject, scope, evaluationException);
return JSValue::encode(result);
}
JSC_DEFINE_HOST_FUNCTION(functionDollarAgentStart, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
String sourceCode = callFrame->argument(0).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
Lock didStartLock;
Condition didStartCondition;
bool didStart = false;
auto isGigacageMemoryExhausted = [&](Gigacage::Kind kind) {
if (!Gigacage::isEnabled(kind))
return false;
if (Gigacage::footprint(kind) < Gigacage::size(kind) * 0.8)
return false;
return true;
};
if (isGigacageMemoryExhausted(Gigacage::JSValue) || isGigacageMemoryExhausted(Gigacage::Primitive))
return JSValue::encode(throwOutOfMemoryError(globalObject, scope, "Gigacage is exhausted"_s));
String workerPath = "worker"_s;
if (!callFrame->argument(1).isUndefined()) {
workerPath = callFrame->argument(1).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
}
Thread::create(
"JSC Agent",
[sourceCode = sourceCode.isolatedCopy(), workerPath = workerPath.isolatedCopy(), &didStartLock, &didStartCondition, &didStart] () {
CommandLine commandLine(CommandLine::CommandLineForWorkers);
commandLine.m_interactive = false;
runJSC(
commandLine, true,
[&] (VM&, GlobalObject* globalObject, bool& success) {
// Notify the thread that started us that we have registered a worker.
{
auto locker = holdLock(didStartLock);
didStart = true;
didStartCondition.notifyOne();
}
NakedPtr<Exception> evaluationException;
JSValue result;
result = evaluate(globalObject, jscSource(sourceCode, SourceOrigin(URL({ }, workerPath))), JSValue(), evaluationException);
if (evaluationException)
result = evaluationException->value();
checkException(globalObject, true, evaluationException, result, commandLine, success);
if (!success)
exit(1);
});
})->detach();
{
auto locker = holdLock(didStartLock);
while (!didStart)
didStartCondition.wait(didStartLock);
}
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionDollarAgentReceiveBroadcast, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue callback = callFrame->argument(0);
auto callData = getCallData(vm, callback);
if (callData.type == CallData::Type::None)
return JSValue::encode(throwException(globalObject, scope, createError(globalObject, "Expected callback"_s)));
RefPtr<Message> message;
{
ReleaseHeapAccessScope releaseAccess(vm.heap);
message = Worker::current().dequeue();
}
auto content = message->releaseContents();
JSValue result = ([&]() -> JSValue {
if (WTF::holds_alternative<ArrayBufferContents>(content)) {
auto nativeBuffer = ArrayBuffer::create(WTF::get<ArrayBufferContents>(WTFMove(content)));
ArrayBufferSharingMode sharingMode = nativeBuffer->sharingMode();
return JSArrayBuffer::create(vm, globalObject->arrayBufferStructure(sharingMode), WTFMove(nativeBuffer));
}
#if ENABLE(WEBASSEMBLY)
if (WTF::holds_alternative<Ref<Wasm::MemoryHandle>>(content)) {
JSWebAssemblyMemory* jsMemory = JSC::JSWebAssemblyMemory::tryCreate(globalObject, vm, globalObject->webAssemblyMemoryStructure());
scope.releaseAssertNoException();
Ref<Wasm::Memory> memory = Wasm::Memory::create(WTF::get<Ref<Wasm::MemoryHandle>>(WTFMove(content)),
[&vm] (Wasm::Memory::NotifyPressure) { vm.heap.collectAsync(CollectionScope::Full); },
[&vm] (Wasm::Memory::SyncTryToReclaim) { vm.heap.collectSync(CollectionScope::Full); },
[&vm, jsMemory] (Wasm::Memory::GrowSuccess, Wasm::PageCount oldPageCount, Wasm::PageCount newPageCount) { jsMemory->growSuccessCallback(vm, oldPageCount, newPageCount); });
jsMemory->adopt(WTFMove(memory));
return jsMemory;
}
#endif
return jsUndefined();
})();
MarkedArgumentBuffer args;
args.append(result);
args.append(jsNumber(message->index()));
if (UNLIKELY(args.hasOverflowed()))
return JSValue::encode(throwOutOfMemoryError(globalObject, scope));
RELEASE_AND_RETURN(scope, JSValue::encode(call(globalObject, callback, callData, jsNull(), args)));
}
JSC_DEFINE_HOST_FUNCTION(functionDollarAgentReport, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
String report = callFrame->argument(0).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
Workers::singleton().report(report);
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionDollarAgentSleep, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (callFrame->argumentCount() >= 1) {
Seconds seconds = Seconds::fromMilliseconds(callFrame->argument(0).toNumber(globalObject));
RETURN_IF_EXCEPTION(scope, encodedJSValue());
sleep(seconds);
}
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionDollarAgentBroadcast, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
int32_t index = callFrame->argument(1).toInt32(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
JSArrayBuffer* jsBuffer = jsDynamicCast<JSArrayBuffer*>(vm, callFrame->argument(0));
if (jsBuffer && jsBuffer->isShared()) {
Workers::singleton().broadcast(
[&] (const AbstractLocker& locker, Worker& worker) {
ArrayBuffer* nativeBuffer = jsBuffer->impl();
ArrayBufferContents contents;
nativeBuffer->transferTo(vm, contents); // "transferTo" means "share" if the buffer is shared.
RefPtr<Message> message = adoptRef(new Message(WTFMove(contents), index));
worker.enqueue(locker, message);
});
return JSValue::encode(jsUndefined());
}
#if ENABLE(WEBASSEMBLY)
JSWebAssemblyMemory* memory = jsDynamicCast<JSWebAssemblyMemory*>(vm, callFrame->argument(0));
if (memory && memory->memory().sharingMode() == Wasm::MemorySharingMode::Shared) {
Workers::singleton().broadcast(
[&] (const AbstractLocker& locker, Worker& worker) {
Ref<Wasm::MemoryHandle> handle { memory->memory().handle() };
RefPtr<Message> message = adoptRef(new Message(WTFMove(handle), index));
worker.enqueue(locker, message);
});
return JSValue::encode(jsUndefined());
}
#endif
return JSValue::encode(throwException(globalObject, scope, createError(globalObject, "Not supported object"_s)));
}
JSC_DEFINE_HOST_FUNCTION(functionDollarAgentGetReport, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
String string = Workers::singleton().tryGetReport();
if (!string)
return JSValue::encode(jsNull());
return JSValue::encode(jsString(vm, string));
}
JSC_DEFINE_HOST_FUNCTION(functionDollarAgentLeaving, (JSGlobalObject*, CallFrame*))
{
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionDollarAgentMonotonicNow, (JSGlobalObject*, CallFrame*))
{
return JSValue::encode(jsNumber(MonotonicTime::now().secondsSinceEpoch().milliseconds()));
}
JSC_DEFINE_HOST_FUNCTION(functionWaitForReport, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
String string;
{
ReleaseHeapAccessScope releaseAccess(vm.heap);
string = Workers::singleton().getReport();
}
if (!string)
return JSValue::encode(jsNull());
return JSValue::encode(jsString(vm, string));
}
JSC_DEFINE_HOST_FUNCTION(functionHeapCapacity, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
return JSValue::encode(jsNumber(vm.heap.capacity()));
}
JSC_DEFINE_HOST_FUNCTION(functionFlashHeapAccess, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
double sleepTimeMs = 0;
if (callFrame->argumentCount() >= 1) {
sleepTimeMs = callFrame->argument(0).toNumber(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
}
vm.heap.releaseAccess();
if (sleepTimeMs)
sleep(Seconds::fromMilliseconds(sleepTimeMs));
vm.heap.acquireAccess();
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionDisableRichSourceInfo, (JSGlobalObject*, CallFrame*))
{
supportsRichSourceInfo = false;
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionMallocInALoop, (JSGlobalObject*, CallFrame*))
{
Vector<void*> ptrs;
for (unsigned i = 0; i < 5000; ++i)
ptrs.append(fastMalloc(1024 * 2));
for (void* ptr : ptrs)
fastFree(ptr);
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionTotalCompileTime, (JSGlobalObject*, CallFrame*))
{
#if ENABLE(JIT)
return JSValue::encode(jsNumber(JIT::totalCompileTime().milliseconds()));
#else
return JSValue::encode(jsNumber(0));
#endif
}
template<typename ValueType>
typename std::enable_if<!std::is_fundamental<ValueType>::value>::type addOption(VM&, JSObject*, const Identifier&, ValueType) { }
template<typename ValueType>
typename std::enable_if<std::is_fundamental<ValueType>::value>::type addOption(VM& vm, JSObject* optionsObject, const Identifier& identifier, ValueType value)
{
optionsObject->putDirect(vm, identifier, JSValue(value));
}
JSC_DEFINE_HOST_FUNCTION(functionJSCOptions, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
JSObject* optionsObject = constructEmptyObject(globalObject);
#define READ_OPTION(type_, name_, defaultValue_, availability_, description_) \
addOption(vm, optionsObject, Identifier::fromString(vm, #name_), Options::name_());
FOR_EACH_JSC_OPTION(READ_OPTION)
#undef READ_OPTION
return JSValue::encode(optionsObject);
}
JSC_DEFINE_HOST_FUNCTION(functionReoptimizationRetryCount, (JSGlobalObject*, CallFrame* callFrame))
{
if (callFrame->argumentCount() < 1)
return JSValue::encode(jsUndefined());
CodeBlock* block = getSomeBaselineCodeBlockForFunction(callFrame->argument(0));
if (!block)
return JSValue::encode(jsNumber(0));
return JSValue::encode(jsNumber(block->reoptimizationRetryCounter()));
}
JSC_DEFINE_HOST_FUNCTION(functionTransferArrayBuffer, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (callFrame->argumentCount() < 1)
return JSValue::encode(throwException(globalObject, scope, createError(globalObject, "Not enough arguments"_s)));
JSArrayBuffer* buffer = jsDynamicCast<JSArrayBuffer*>(vm, callFrame->argument(0));
if (!buffer)
return JSValue::encode(throwException(globalObject, scope, createError(globalObject, "Expected an array buffer"_s)));
ArrayBufferContents dummyContents;
buffer->impl()->transferTo(vm, dummyContents);
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionFailNextNewCodeBlock, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
vm.setFailNextNewCodeBlock();
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionQuit, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
vm.codeCache()->write(vm);
jscExit(EXIT_SUCCESS);
#if COMPILER(MSVC)
// Without this, Visual Studio will complain that this method does not return a value.
return JSValue::encode(jsUndefined());
#endif
}
JSC_DEFINE_HOST_FUNCTION(functionFalse, (JSGlobalObject*, CallFrame*))
{
return JSValue::encode(jsBoolean(false));
}
JSC_DEFINE_HOST_FUNCTION(functionUndefined1, (JSGlobalObject*, CallFrame*))
{
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionUndefined2, (JSGlobalObject*, CallFrame*))
{
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionIsInt32, (JSGlobalObject*, CallFrame* callFrame))
{
for (size_t i = 0; i < callFrame->argumentCount(); ++i) {
if (!callFrame->argument(i).isInt32())
return JSValue::encode(jsBoolean(false));
}
return JSValue::encode(jsBoolean(true));
}
JSC_DEFINE_HOST_FUNCTION(functionIsPureNaN, (JSGlobalObject*, CallFrame* callFrame))
{
for (size_t i = 0; i < callFrame->argumentCount(); ++i) {
JSValue value = callFrame->argument(i);
if (!value.isNumber())
return JSValue::encode(jsBoolean(false));
double number = value.asNumber();
if (!std::isnan(number))
return JSValue::encode(jsBoolean(false));
if (isImpureNaN(number))
return JSValue::encode(jsBoolean(false));
}
return JSValue::encode(jsBoolean(true));
}
JSC_DEFINE_HOST_FUNCTION(functionIdentity, (JSGlobalObject*, CallFrame* callFrame))
{
return JSValue::encode(callFrame->argument(0));
}
JSC_DEFINE_HOST_FUNCTION(functionEffectful42, (JSGlobalObject*, CallFrame*))
{
return JSValue::encode(jsNumber(42));
}
JSC_DEFINE_HOST_FUNCTION(functionMakeMasquerader, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
return JSValue::encode(InternalFunction::createFunctionThatMasqueradesAsUndefined(vm, globalObject, 0, "IsHTMLDDA"_s, functionCallMasquerader));
}
JSC_DEFINE_HOST_FUNCTION(functionCallMasquerader, (JSGlobalObject*, CallFrame*))
{
return JSValue::encode(jsNull());
}
JSC_DEFINE_HOST_FUNCTION(functionHasCustomProperties, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
JSValue value = callFrame->argument(0);
if (value.isObject())
return JSValue::encode(jsBoolean(asObject(value)->hasCustomProperties(globalObject->vm())));
return JSValue::encode(jsBoolean(false));
}
JSC_DEFINE_HOST_FUNCTION(functionDumpTypesForAllVariables, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
vm.dumpTypeProfilerData();
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionDrainMicrotasks, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
vm.drainMicrotasks();
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionSetTimeout, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
// FIXME: This means we can't pass any internal function but I don't think that's common for testing.
auto callback = jsDynamicCast<JSFunction*>(vm, callFrame->argument(0));
if (!callback)
return throwVMTypeError(globalObject, scope, "First argument is not a JS function"_s);
// FIXME: We don't look at the timeout parameter because we don't have a schedule work later API.
vm.deferredWorkTimer->addPendingWork(vm, callback, { });
vm.deferredWorkTimer->scheduleWorkSoon(callback, [callback] {
JSGlobalObject* globalObject = callback->globalObject();
VM& vm = globalObject->vm();
MarkedArgumentBuffer args;
call(globalObject, callback, jsUndefined(), args, "You shouldn't see this...");
vm.deferredWorkTimer->cancelPendingWork(callback);
});
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionReleaseWeakRefs, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
vm.finalizeSynchronousJSExecution();
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionFinalizationRegistryLiveCount, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* finalizationRegistry = jsDynamicCast<JSFinalizationRegistry*>(vm, callFrame->argument(0));
if (!finalizationRegistry)
return throwVMTypeError(globalObject, scope, "first argument is not a finalizationRegistry"_s);
auto locker = holdLock(finalizationRegistry->cellLock());
return JSValue::encode(jsNumber(finalizationRegistry->liveCount(locker)));
}
JSC_DEFINE_HOST_FUNCTION(functionFinalizationRegistryDeadCount, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* finalizationRegistry = jsDynamicCast<JSFinalizationRegistry*>(vm, callFrame->argument(0));
if (!finalizationRegistry)
return throwVMTypeError(globalObject, scope, "first argument is not a finalizationRegistry"_s);
auto locker = holdLock(finalizationRegistry->cellLock());
return JSValue::encode(jsNumber(finalizationRegistry->deadCount(locker)));
}
JSC_DEFINE_HOST_FUNCTION(functionIs32BitPlatform, (JSGlobalObject*, CallFrame*))
{
#if USE(JSVALUE64)
return JSValue::encode(JSValue(JSC::JSValue::JSFalse));
#else
return JSValue::encode(JSValue(JSC::JSValue::JSTrue));
#endif
}
JSC_DEFINE_HOST_FUNCTION(functionCreateGlobalObject, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
return JSValue::encode(GlobalObject::create(vm, GlobalObject::createStructure(vm, jsNull()), Vector<String>()));
}
JSC_DEFINE_HOST_FUNCTION(functionCreateHeapBigInt, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue argument = callFrame->argument(0);
JSValue bigInt = argument.toBigInt(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
#if USE(BIGINT32)
if (bigInt.isHeapBigInt())
return JSValue::encode(bigInt);
ASSERT(bigInt.isBigInt32());
int32_t value = bigInt.bigInt32AsInt32();
RELEASE_AND_RETURN(scope, JSValue::encode(JSBigInt::createFrom(globalObject, value)));
#else
return JSValue::encode(bigInt);
#endif
}
#if USE(BIGINT32)
JSC_DEFINE_HOST_FUNCTION(functionCreateBigInt32, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue argument = callFrame->argument(0);
JSValue bigIntValue = argument.toBigInt(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
if (bigIntValue.isBigInt32())
return JSValue::encode(bigIntValue);
ASSERT(bigIntValue.isHeapBigInt());
JSBigInt* bigInt = jsCast<JSBigInt*>(bigIntValue);
if (!bigInt->length())
return JSValue::encode(jsBigInt32(0));
if (bigInt->length() == 1) {
JSBigInt::Digit digit = bigInt->digit(0);
if (bigInt->sign()) {
if (digit <= static_cast<uint64_t>(-static_cast<int64_t>(INT32_MIN)))
return JSValue::encode(jsBigInt32(static_cast<int32_t>(-static_cast<int64_t>(digit))));
} else {
if (digit <= INT32_MAX)
return JSValue::encode(jsBigInt32(static_cast<int32_t>(digit)));
}
}
throwTypeError(globalObject, scope, "Out of range of BigInt32"_s);
return { };
}
#endif
JSC_DEFINE_HOST_FUNCTION(functionUseBigInt32, (JSGlobalObject*, CallFrame*))
{
#if USE(BIGINT32)
return JSValue::encode(jsBoolean(true));
#else
return JSValue::encode(jsBoolean(false));
#endif
}
JSC_DEFINE_HOST_FUNCTION(functionIsBigInt32, (JSGlobalObject*, CallFrame* callFrame))
{
#if USE(BIGINT32)
return JSValue::encode(jsBoolean(callFrame->argument(0).isBigInt32()));
#else
UNUSED_PARAM(callFrame);
return JSValue::encode(jsBoolean(false));
#endif
}
JSC_DEFINE_HOST_FUNCTION(functionIsHeapBigInt, (JSGlobalObject*, CallFrame* callFrame))
{
return JSValue::encode(jsBoolean(callFrame->argument(0).isHeapBigInt()));
}
JSC_DEFINE_HOST_FUNCTION(functionCheckModuleSyntax, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
String source = callFrame->argument(0).toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
StopWatch stopWatch;
stopWatch.start();
ParserError error;
bool validSyntax = checkModuleSyntax(globalObject, jscSource(source, { }, String(), TextPosition(), SourceProviderSourceType::Module), error);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
stopWatch.stop();
if (!validSyntax)
throwException(globalObject, scope, jsNontrivialString(vm, toString("SyntaxError: ", error.message(), ":", error.line())));
return JSValue::encode(jsNumber(stopWatch.getElapsedMS()));
}
JSC_DEFINE_HOST_FUNCTION(functionPlatformSupportsSamplingProfiler, (JSGlobalObject*, CallFrame*))
{
#if ENABLE(SAMPLING_PROFILER)
return JSValue::encode(JSValue(JSC::JSValue::JSTrue));
#else
return JSValue::encode(JSValue(JSC::JSValue::JSFalse));
#endif
}
JSC_DEFINE_HOST_FUNCTION(functionGenerateHeapSnapshot, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
JSLockHolder lock(vm);
auto scope = DECLARE_THROW_SCOPE(vm);
HeapSnapshotBuilder snapshotBuilder(vm.ensureHeapProfiler());
snapshotBuilder.buildSnapshot();
String jsonString = snapshotBuilder.json();
EncodedJSValue result = JSValue::encode(JSONParse(globalObject, jsonString));
scope.releaseAssertNoException();
return result;
}
JSC_DEFINE_HOST_FUNCTION(functionGenerateHeapSnapshotForGCDebugging, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
JSLockHolder lock(vm);
auto scope = DECLARE_THROW_SCOPE(vm);
String jsonString;
{
DeferGCForAWhile deferGC(vm.heap); // Prevent concurrent GC from interfering with the full GC that the snapshot does.
HeapSnapshotBuilder snapshotBuilder(vm.ensureHeapProfiler(), HeapSnapshotBuilder::SnapshotType::GCDebuggingSnapshot);
snapshotBuilder.buildSnapshot();
jsonString = snapshotBuilder.json();
}
scope.releaseAssertNoException();
return JSValue::encode(jsString(vm, jsonString));
}
JSC_DEFINE_HOST_FUNCTION(functionResetSuperSamplerState, (JSGlobalObject*, CallFrame*))
{
resetSuperSamplerState();
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionEnsureArrayStorage, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
for (unsigned i = 0; i < callFrame->argumentCount(); ++i) {
if (JSObject* object = jsDynamicCast<JSObject*>(vm, callFrame->argument(i)))
object->ensureArrayStorage(vm);
}
return JSValue::encode(jsUndefined());
}
#if ENABLE(SAMPLING_PROFILER)
JSC_DEFINE_HOST_FUNCTION(functionStartSamplingProfiler, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
SamplingProfiler& samplingProfiler = vm.ensureSamplingProfiler(WTF::Stopwatch::create());
samplingProfiler.noticeCurrentThreadAsJSCExecutionThread();
samplingProfiler.start();
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionSamplingProfilerStackTraces, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (!vm.samplingProfiler())
return JSValue::encode(throwException(globalObject, scope, createError(globalObject, "Sampling profiler was never started"_s)));
String jsonString = vm.samplingProfiler()->stackTracesAsJSON();
EncodedJSValue result = JSValue::encode(JSONParse(globalObject, jsonString));
scope.releaseAssertNoException();
return result;
}
#endif // ENABLE(SAMPLING_PROFILER)
JSC_DEFINE_HOST_FUNCTION(functionMaxArguments, (JSGlobalObject*, CallFrame*))
{
return JSValue::encode(jsNumber(JSC::maxArguments));
}
JSC_DEFINE_HOST_FUNCTION(functionAsyncTestStart, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue numberOfAsyncPasses = callFrame->argument(0);
if (!numberOfAsyncPasses.isUInt32())
return throwVMError(globalObject, scope, "Expected first argument to be a uint32"_s);
asyncTestExpectedPasses += numberOfAsyncPasses.asUInt32();
return encodedJSUndefined();
}
JSC_DEFINE_HOST_FUNCTION(functionAsyncTestPassed, (JSGlobalObject*, CallFrame*))
{
asyncTestPasses++;
return encodedJSUndefined();
}
#if ENABLE(WEBASSEMBLY)
JSC_DEFINE_HOST_FUNCTION(functionWebAssemblyMemoryMode, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (!Wasm::isSupported())
return throwVMTypeError(globalObject, scope, "WebAssemblyMemoryMode should only be called if the useWebAssembly option is set"_s);
if (JSObject* object = callFrame->argument(0).getObject()) {
if (auto* memory = jsDynamicCast<JSWebAssemblyMemory*>(vm, object))
return JSValue::encode(jsString(vm, makeString(memory->memory().mode())));
if (auto* instance = jsDynamicCast<JSWebAssemblyInstance*>(vm, object))
return JSValue::encode(jsString(vm, makeString(instance->memoryMode())));
}
return throwVMTypeError(globalObject, scope, "WebAssemblyMemoryMode expects either a WebAssembly.Memory or WebAssembly.Instance"_s);
}
#endif // ENABLE(WEBASSEMBLY)
JSC_DEFINE_HOST_FUNCTION(functionSetUnhandledRejectionCallback, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
JSObject* object = callFrame->argument(0).getObject();
auto scope = DECLARE_THROW_SCOPE(vm);
if (!object || !object->isCallable(vm))
return throwVMTypeError(globalObject, scope);
globalObject->setUnhandledRejectionCallback(vm, object);
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(functionAsDoubleNumber, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
double num = callFrame->argument(0).toNumber(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
return JSValue::encode(jsDoubleNumber(num));
}
JSC_DEFINE_HOST_FUNCTION(functionDropAllLocks, (JSGlobalObject* globalObject, CallFrame*))
{
JSLock::DropAllLocks dropAllLocks(globalObject);
return JSValue::encode(jsUndefined());
}
// Use SEH for Release builds only to get rid of the crash report dialog
// (luckily the same tests fail in Release and Debug builds so far). Need to
// be in a separate main function because the jscmain function requires object
// unwinding.
#if COMPILER(MSVC) && !defined(_DEBUG)
#define TRY __try {
#define EXCEPT(x) } __except (EXCEPTION_EXECUTE_HANDLER) { x; }
#else
#define TRY
#define EXCEPT(x)
#endif
int jscmain(int argc, char** argv);
#if OS(DARWIN) || OS(LINUX)
static size_t memoryLimit;
static void crashIfExceedingMemoryLimit()
{
if (!memoryLimit)
return;
MemoryFootprint footprint = MemoryFootprint::now();
if (footprint.current > memoryLimit) {
dataLogLn("Crashing because current footprint: ", footprint.current, " exceeds limit: ", memoryLimit);
CRASH();
}
}
static void startMemoryMonitoringThreadIfNeeded()
{
char* memoryLimitString = getenv("JSCTEST_memoryLimit");
if (!memoryLimitString)
return;
if (sscanf(memoryLimitString, "%zu", &memoryLimit) != 1) {
dataLogLn("WARNING: malformed JSCTEST_memoryLimit environment variable");
return;
}
if (!memoryLimit)
return;
Thread::create("jsc Memory Monitor", [=] {
while (true) {
sleep(Seconds::fromMilliseconds(5));
crashIfExceedingMemoryLimit();
}
});
}
#endif // OS(DARWIN) || OS(LINUX)
static double s_desiredTimeout;
static double s_timeoutMultiplier = 1.0;
static Seconds s_timeoutDuration;
static Seconds s_maxAllowedCPUTime;
static VM* s_vm;
static void startTimeoutTimer(Seconds duration)
{
Thread::create("jsc Timeout Thread", [=] () {
sleep(duration);
VMInspector::forEachVM([&] (VM& vm) -> VMInspector::FunctorStatus {
if (&vm != s_vm)
return VMInspector::FunctorStatus::Continue;
vm.notifyNeedShellTimeoutCheck();
return VMInspector::FunctorStatus::Done;
});
if (const char* timeoutString = getenv("JSCTEST_hardTimeout")) {
double hardTimeoutInDouble = 0;
if (sscanf(timeoutString, "%lf", &hardTimeoutInDouble) != 1)
dataLog("WARNING: hardTimeout string is malformed, got ", timeoutString, " but expected a number. Not using a timeout.\n");
else {
Seconds hardTimeout { hardTimeoutInDouble };
sleep(hardTimeout);
dataLogLn("HARD TIMEOUT after ", hardTimeout);
exit(EXIT_FAILURE);
}
}
});
}
static void timeoutCheckCallback(VM& vm)
{
RELEASE_ASSERT(&vm == s_vm);
auto cpuTime = CPUTime::forCurrentThread();
if (cpuTime >= s_maxAllowedCPUTime) {
dataLog("Timed out after ", s_timeoutDuration, " seconds!\n");
CRASH();
}
auto remainingTime = s_maxAllowedCPUTime - cpuTime;
startTimeoutTimer(remainingTime);
}
static void initializeTimeoutIfNeeded()
{
if (char* timeoutString = getenv("JSCTEST_timeout")) {
if (sscanf(timeoutString, "%lf", &s_desiredTimeout) != 1) {
dataLog("WARNING: timeout string is malformed, got ", timeoutString,
" but expected a number. Not using a timeout.\n");
} else
g_jscConfig.shellTimeoutCheckCallback = timeoutCheckCallback;
}
}
static void startTimeoutThreadIfNeeded(VM& vm)
{
if (!g_jscConfig.shellTimeoutCheckCallback)
return;
s_vm = &vm;
s_timeoutDuration = Seconds(s_desiredTimeout * s_timeoutMultiplier);
s_maxAllowedCPUTime = CPUTime::forCurrentThread() + s_timeoutDuration;
Seconds timeoutDuration(s_desiredTimeout * s_timeoutMultiplier);
startTimeoutTimer(timeoutDuration);
}
int main(int argc, char** argv)
{
#if OS(DARWIN) && CPU(ARM_THUMB2)
// Enabled IEEE754 denormal support.
fenv_t env;
fegetenv( &env );
env.__fpscr &= ~0x01000000u;
fesetenv( &env );
#endif
#if OS(WINDOWS)
// Cygwin calls ::SetErrorMode(SEM_FAILCRITICALERRORS), which we will inherit. This is bad for
// testing/debugging, as it causes the post-mortem debugger not to be invoked. We reset the
// error mode here to work around Cygwin's behavior. See <http://webkit.org/b/55222>.
::SetErrorMode(0);
_setmode(_fileno(stdout), _O_BINARY);
_setmode(_fileno(stderr), _O_BINARY);
#if defined(_DEBUG)
_CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
_CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
_CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
_CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_FILE);
_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE);
#endif
timeBeginPeriod(1);
#endif
#if PLATFORM(GTK)
if (!setlocale(LC_ALL, ""))
WTFLogAlways("Locale not supported by C library.\n\tUsing the fallback 'C' locale.");
#endif
// Need to initialize WTF before we start any threads. Cannot initialize JSC
// yet, since that would do somethings that we'd like to defer until after we
// have a chance to parse options.
WTF::initialize();
// We can't use destructors in the following code because it uses Windows
// Structured Exception Handling
int res = EXIT_SUCCESS;
TRY
res = jscmain(argc, argv);
EXCEPT(res = EXIT_EXCEPTION)
finalizeStatsAtEndOfTesting();
if (getenv("JS_SHELL_WAIT_FOR_INPUT_TO_EXIT")) {
WTF::fastDisableScavenger();
fprintf(stdout, "\njs shell waiting for input to exit\n");
fflush(stdout);
getc(stdin);
}
jscExit(res);
}
static void dumpException(GlobalObject* globalObject, JSValue exception)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_CATCH_SCOPE(vm);
#define CHECK_EXCEPTION() do { \
if (scope.exception()) { \
scope.clearException(); \
return; \
} \
} while (false)
auto exceptionString = exception.toWTFString(globalObject);
CHECK_EXCEPTION();
Expected<CString, UTF8ConversionError> expectedCString = exceptionString.tryGetUtf8();
if (expectedCString)
printf("Exception: %s\n", expectedCString.value().data());
else
printf("Exception: <out of memory while extracting exception string>\n");
Identifier nameID = Identifier::fromString(vm, "name");
CHECK_EXCEPTION();
Identifier fileNameID = Identifier::fromString(vm, "sourceURL");
CHECK_EXCEPTION();
Identifier lineNumberID = Identifier::fromString(vm, "line");
CHECK_EXCEPTION();
Identifier stackID = Identifier::fromString(vm, "stack");
CHECK_EXCEPTION();
JSValue nameValue = exception.get(globalObject, nameID);
CHECK_EXCEPTION();
JSValue fileNameValue = exception.get(globalObject, fileNameID);
CHECK_EXCEPTION();
JSValue lineNumberValue = exception.get(globalObject, lineNumberID);
CHECK_EXCEPTION();
JSValue stackValue = exception.get(globalObject, stackID);
CHECK_EXCEPTION();
auto nameString = nameValue.toWTFString(globalObject);
CHECK_EXCEPTION();
if (nameString == "SyntaxError" && (!fileNameValue.isUndefinedOrNull() || !lineNumberValue.isUndefinedOrNull())) {
auto fileNameString = fileNameValue.toWTFString(globalObject);
CHECK_EXCEPTION();
auto lineNumberString = lineNumberValue.toWTFString(globalObject);
CHECK_EXCEPTION();
printf("at %s:%s\n", fileNameString.utf8().data(), lineNumberString.utf8().data());
}
if (!stackValue.isUndefinedOrNull()) {
auto stackString = stackValue.toWTFString(globalObject);
CHECK_EXCEPTION();
if (stackString.length())
printf("%s\n", stackString.utf8().data());
}
#undef CHECK_EXCEPTION
}
static bool checkUncaughtException(VM& vm, GlobalObject* globalObject, JSValue exception, const CommandLine& options)
{
const String& expectedExceptionName = options.m_uncaughtExceptionName;
auto scope = DECLARE_CATCH_SCOPE(vm);
scope.clearException();
if (!exception) {
printf("Expected uncaught exception with name '%s' but none was thrown\n", expectedExceptionName.utf8().data());
return false;
}
JSValue exceptionClass = globalObject->get(globalObject, Identifier::fromString(vm, expectedExceptionName));
if (!exceptionClass.isObject() || scope.exception()) {
printf("Expected uncaught exception with name '%s' but given exception class is not defined\n", expectedExceptionName.utf8().data());
return false;
}
bool isInstanceOfExpectedException = jsCast<JSObject*>(exceptionClass)->hasInstance(globalObject, exception);
if (scope.exception()) {
printf("Expected uncaught exception with name '%s' but given exception class fails performing hasInstance\n", expectedExceptionName.utf8().data());
return false;
}
if (isInstanceOfExpectedException) {
if (options.m_alwaysDumpUncaughtException)
dumpException(globalObject, exception);
return true;
}
printf("Expected uncaught exception with name '%s' but exception value is not instance of this exception class\n", expectedExceptionName.utf8().data());
dumpException(globalObject, exception);
return false;
}
static void checkException(GlobalObject* globalObject, bool isLastFile, bool hasException, JSValue value, const CommandLine& options, bool& success)
{
VM& vm = globalObject->vm();
if (options.m_treatWatchdogExceptionAsSuccess && value.inherits<TerminatedExecutionError>(vm)) {
ASSERT(hasException);
return;
}
if (!options.m_uncaughtExceptionName || !isLastFile) {
success = success && !hasException;
if (options.m_dump && !hasException)
printf("End: %s\n", value.toWTFString(globalObject).utf8().data());
if (hasException)
dumpException(globalObject, value);
} else
success = success && checkUncaughtException(vm, globalObject, (hasException) ? value : JSValue(), options);
}
void GlobalObject::reportUncaughtExceptionAtEventLoop(JSGlobalObject* globalObject, Exception* exception)
{
auto* global = jsCast<GlobalObject*>(globalObject);
dumpException(global, exception->value());
bool hideNoReturn = true;
if (hideNoReturn)
jscExit(EXIT_EXCEPTION);
}
static void runWithOptions(GlobalObject* globalObject, CommandLine& options, bool& success)
{
Vector<Script>& scripts = options.m_scripts;
String fileName;
Vector<char> scriptBuffer;
VM& vm = globalObject->vm();
auto scope = DECLARE_CATCH_SCOPE(vm);
#if ENABLE(SAMPLING_FLAGS)
SamplingFlags::start();
#endif
for (size_t i = 0; i < scripts.size(); i++) {
JSInternalPromise* promise = nullptr;
bool isModule = options.m_module || scripts[i].scriptType == Script::ScriptType::Module;
if (scripts[i].codeSource == Script::CodeSource::File) {
fileName = scripts[i].argument;
if (scripts[i].strictMode == Script::StrictMode::Strict)
scriptBuffer.append("\"use strict\";\n", strlen("\"use strict\";\n"));
if (isModule) {
// If the passed file isn't an absolute path append "./" so the module loader doesn't think this is a bare-name specifier.
fileName = fileName.startsWith('/') ? fileName : makeString("./", fileName);
promise = loadAndEvaluateModule(globalObject, fileName, jsUndefined(), jsUndefined());
scope.releaseAssertNoException();
} else {
if (!fetchScriptFromLocalFileSystem(fileName, scriptBuffer)) {
success = false; // fail early so we can catch missing files
return;
}
}
} else {
size_t commandLineLength = strlen(scripts[i].argument);
scriptBuffer.resize(commandLineLength);
std::copy(scripts[i].argument, scripts[i].argument + commandLineLength, scriptBuffer.begin());
fileName = "[Command Line]"_s;
}
bool isLastFile = i == scripts.size() - 1;
SourceOrigin sourceOrigin { absolutePath(fileName) };
if (isModule) {
if (!promise) {
// FIXME: This should use an absolute file URL https://bugs.webkit.org/show_bug.cgi?id=193077
promise = loadAndEvaluateModule(globalObject, jscSource(stringFromUTF(scriptBuffer), sourceOrigin, fileName, TextPosition(), SourceProviderSourceType::Module), jsUndefined());
RETURN_IF_EXCEPTION(scope, void());
}
JSFunction* fulfillHandler = JSNativeStdFunction::create(vm, globalObject, 1, String(), [&success, &options, isLastFile](JSGlobalObject* globalObject, CallFrame* callFrame) {
checkException(jsCast<GlobalObject*>(globalObject), isLastFile, false, callFrame->argument(0), options, success);
return JSValue::encode(jsUndefined());
});
JSFunction* rejectHandler = JSNativeStdFunction::create(vm, globalObject, 1, String(), [&success, &options, isLastFile](JSGlobalObject* globalObject, CallFrame* callFrame) {
checkException(jsCast<GlobalObject*>(globalObject), isLastFile, true, callFrame->argument(0), options, success);
return JSValue::encode(jsUndefined());
});
promise->then(globalObject, fulfillHandler, rejectHandler);
scope.releaseAssertNoException();
vm.drainMicrotasks();
} else {
NakedPtr<Exception> evaluationException;
JSValue returnValue = evaluate(globalObject, jscSource(scriptBuffer, sourceOrigin , fileName), JSValue(), evaluationException);
scope.assertNoException();
if (evaluationException)
returnValue = evaluationException->value();
checkException(globalObject, isLastFile, evaluationException, returnValue, options, success);
}
scriptBuffer.clear();
scope.clearException();
}
#if ENABLE(REGEXP_TRACING)
vm.dumpRegExpTrace();
#endif
}
#define RUNNING_FROM_XCODE 0
static void runInteractive(GlobalObject* globalObject)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_CATCH_SCOPE(vm);
URL directoryName = currentWorkingDirectory();
if (!directoryName.isValid())
return;
SourceOrigin sourceOrigin(URL(directoryName, "./interpreter"_s));
bool shouldQuit = false;
while (!shouldQuit) {
#if HAVE(READLINE) && !RUNNING_FROM_XCODE
ParserError error;
String source;
do {
error = ParserError();
char* line = readline(source.isEmpty() ? interactivePrompt : "... ");
shouldQuit = !line;
if (!line)
break;
source = source + String::fromUTF8(line);
source = source + '\n';
checkSyntax(vm, jscSource(source, sourceOrigin), error);
if (!line[0]) {
free(line);
break;
}
add_history(line);
free(line);
} while (error.syntaxErrorType() == ParserError::SyntaxErrorRecoverable);
if (error.isValid()) {
printf("%s:%d\n", error.message().utf8().data(), error.line());
continue;
}
NakedPtr<Exception> evaluationException;
JSValue returnValue = evaluate(globalObject, jscSource(source, sourceOrigin), JSValue(), evaluationException);
#else
printf("%s", interactivePrompt);
Vector<char, 256> line;
int c;
while ((c = getchar()) != EOF) {
// FIXME: Should we also break on \r?
if (c == '\n')
break;
line.append(c);
}
if (line.isEmpty())
break;
NakedPtr<Exception> evaluationException;
JSValue returnValue = evaluate(globalObject, jscSource(line, sourceOrigin, sourceOrigin.string()), JSValue(), evaluationException);
#endif
Expected<CString, UTF8ConversionError> utf8;
if (evaluationException) {
fputs("Exception: ", stdout);
utf8 = evaluationException->value().toWTFString(globalObject).tryGetUtf8();
} else
utf8 = returnValue.toWTFString(globalObject).tryGetUtf8();
CString result;
if (utf8)
result = utf8.value();
else if (utf8.error() == UTF8ConversionError::OutOfMemory)
result = "OutOfMemory while processing string";
else
result = "Error while processing string";
fwrite(result.data(), sizeof(char), result.length(), stdout);
putchar('\n');
scope.clearException();
vm.drainMicrotasks();
}
printf("\n");
}
static NO_RETURN void printUsageStatement(bool help = false)
{
fprintf(stderr, "Usage: jsc [options] [files] [-- arguments]\n");
fprintf(stderr, " -d Dumps bytecode (debug builds only)\n");
fprintf(stderr, " -e Evaluate argument as script code\n");
fprintf(stderr, " -f Specifies a source file (deprecated)\n");
fprintf(stderr, " -h|--help Prints this help message\n");
fprintf(stderr, " -i Enables interactive mode (default if no files are specified)\n");
fprintf(stderr, " -m Execute as a module\n");
#if OS(UNIX)
fprintf(stderr, " -s Installs signal handlers that exit on a crash (Unix platforms only, lldb will not work with this option) \n");
#endif
fprintf(stderr, " -p <file> Outputs profiling data to a file\n");
fprintf(stderr, " -x Output exit code before terminating\n");
fprintf(stderr, "\n");
fprintf(stderr, " --sample Collects and outputs sampling profiler data\n");
fprintf(stderr, " --test262-async Check that some script calls the print function with the string 'Test262:AsyncTestComplete'\n");
fprintf(stderr, " --strict-file=<file> Parse the given file as if it were in strict mode (this option may be passed more than once)\n");
fprintf(stderr, " --module-file=<file> Parse and evaluate the given file as module (this option may be passed more than once)\n");
fprintf(stderr, " --exception=<name> Check the last script exits with an uncaught exception with the specified name\n");
fprintf(stderr, " --watchdog-exception-ok Uncaught watchdog exceptions exit with success\n");
fprintf(stderr, " --dumpException Dump uncaught exception text\n");
fprintf(stderr, " --footprint Dump memory footprint after done executing\n");
fprintf(stderr, " --options Dumps all JSC VM options and exits\n");
fprintf(stderr, " --dumpOptions Dumps all non-default JSC VM options before continuing\n");
fprintf(stderr, " --<jsc VM option>=<value> Sets the specified JSC VM option\n");
fprintf(stderr, " --destroy-vm Destroy VM before exiting\n");
fprintf(stderr, " --can-block-is-false Make main thread's Atomics.wait throw\n");
fprintf(stderr, "\n");
fprintf(stderr, "Files with a .mjs extension will always be evaluated as modules.\n");
fprintf(stderr, "\n");
jscExit(help ? EXIT_SUCCESS : EXIT_FAILURE);
}
static bool isMJSFile(char *filename)
{
filename = strrchr(filename, '.');
if (filename)
return !strcmp(filename, ".mjs");
return false;
}
void CommandLine::parseArguments(int argc, char** argv)
{
Options::AllowUnfinalizedAccessScope scope;
Options::initialize();
Options::useSharedArrayBuffer() = true;
Options::useAtMethod() = true;
#if PLATFORM(IOS_FAMILY)
Options::crashIfCantAllocateJITMemory() = true;
#endif
if (Options::dumpOptions()) {
printf("Command line:");
#if PLATFORM(COCOA)
for (char** envp = *_NSGetEnviron(); *envp; envp++) {
const char* env = *envp;
if (!strncmp("JSC_", env, 4))
printf(" %s", env);
}
#endif // PLATFORM(COCOA)
for (int i = 0; i < argc; ++i)
printf(" %s", argv[i]);
printf("\n");
}
int i = 1;
JSC::Options::DumpLevel dumpOptionsLevel = JSC::Options::DumpLevel::None;
bool needToExit = false;
bool hasBadJSCOptions = false;
for (; i < argc; ++i) {
const char* arg = argv[i];
if (!strcmp(arg, "-f")) {
if (++i == argc)
printUsageStatement();
m_scripts.append(Script(Script::StrictMode::Sloppy, Script::CodeSource::File, Script::ScriptType::Script, argv[i]));
continue;
}
if (!strcmp(arg, "-e")) {
if (++i == argc)
printUsageStatement();
m_scripts.append(Script(Script::StrictMode::Sloppy, Script::CodeSource::CommandLine, Script::ScriptType::Script, argv[i]));
continue;
}
if (!strcmp(arg, "-i")) {
m_interactive = true;
continue;
}
if (!strcmp(arg, "-d")) {
m_dump = true;
continue;
}
if (!strcmp(arg, "-p")) {
if (++i == argc)
printUsageStatement();
m_profile = true;
m_profilerOutput = argv[i];
continue;
}
if (!strcmp(arg, "-m")) {
m_module = true;
continue;
}
if (!strcmp(arg, "-s")) {
#if OS(UNIX)
SignalAction (*exit)(Signal, SigInfo&, PlatformRegisters&) = [] (Signal, SigInfo&, PlatformRegisters&) {
dataLogLn("Signal handler hit. Exiting with status 0");
_exit(0);
return SignalAction::ForceDefault;
};
addSignalHandler(Signal::IllegalInstruction, SignalHandler(exit));
addSignalHandler(Signal::AccessFault, SignalHandler(exit));
addSignalHandler(Signal::FloatingPoint, SignalHandler(exit));
// once we do this lldb won't work anymore because we will exit on any breakpoints it sets.
addSignalHandler(Signal::Breakpoint, SignalHandler(exit));
activateSignalHandlersFor(Signal::IllegalInstruction);
activateSignalHandlersFor(Signal::AccessFault);
activateSignalHandlersFor(Signal::FloatingPoint);
activateSignalHandlersFor(Signal::Breakpoint);
#if !OS(DARWIN)
addSignalHandler(Signal::Abort, SignalHandler(exit));
activateSignalHandlersFor(Signal::Abort);
#endif
#endif
continue;
}
if (!strcmp(arg, "-x")) {
m_exitCode = true;
continue;
}
if (!strcmp(arg, "--")) {
++i;
break;
}
if (!strcmp(arg, "-h") || !strcmp(arg, "--help"))
printUsageStatement(true);
if (!strcmp(arg, "--options")) {
dumpOptionsLevel = JSC::Options::DumpLevel::Verbose;
needToExit = true;
continue;
}
if (!strcmp(arg, "--dumpOptions")) {
dumpOptionsLevel = JSC::Options::DumpLevel::Overridden;
continue;
}
if (!strcmp(arg, "--sample")) {
JSC::Options::useSamplingProfiler() = true;
JSC::Options::collectSamplingProfilerDataForJSCShell() = true;
m_dumpSamplingProfilerData = true;
continue;
}
if (!strcmp(arg, "--destroy-vm")) {
m_destroyVM = true;
continue;
}
if (!strcmp(arg, "--can-block-is-false")) {
m_canBlockIsFalse = true;
continue;
}
if (!strcmp(arg, "--disableOptionsFreezingForTesting")) {
Config::disableFreezingForTesting();
continue;
}
static const char* timeoutMultiplierOptStr = "--timeoutMultiplier=";
static const unsigned timeoutMultiplierOptStrLength = strlen(timeoutMultiplierOptStr);
if (!strncmp(arg, timeoutMultiplierOptStr, timeoutMultiplierOptStrLength)) {
const char* valueStr = &arg[timeoutMultiplierOptStrLength];
if (sscanf(valueStr, "%lf", &s_timeoutMultiplier) != 1)
dataLog("WARNING: --timeoutMultiplier=", valueStr, " is invalid. Expects a numeric ratio.\n");
continue;
}
if (!strcmp(arg, "--test262-async")) {
asyncTestExpectedPasses++;
continue;
}
if (!strcmp(arg, "--remote-debug")) {
m_enableRemoteDebugging = true;
continue;
}
static const unsigned strictFileStrLength = strlen("--strict-file=");
if (!strncmp(arg, "--strict-file=", strictFileStrLength)) {
m_scripts.append(Script(Script::StrictMode::Strict, Script::CodeSource::File, Script::ScriptType::Script, argv[i] + strictFileStrLength));
continue;
}
static const unsigned moduleFileStrLength = strlen("--module-file=");
if (!strncmp(arg, "--module-file=", moduleFileStrLength)) {
m_scripts.append(Script(Script::StrictMode::Sloppy, Script::CodeSource::File, Script::ScriptType::Module, argv[i] + moduleFileStrLength));
continue;
}
if (!strcmp(arg, "--dumpException")) {
m_alwaysDumpUncaughtException = true;
continue;
}
if (!strcmp(arg, "--footprint")) {
m_dumpMemoryFootprint = true;
continue;
}
static const unsigned exceptionStrLength = strlen("--exception=");
if (!strncmp(arg, "--exception=", exceptionStrLength)) {
m_uncaughtExceptionName = String(arg + exceptionStrLength);
continue;
}
if (!strcmp(arg, "--watchdog-exception-ok")) {
m_treatWatchdogExceptionAsSuccess = true;
continue;
}
// See if the -- option is a JSC VM option.
if (strstr(arg, "--") == arg) {
if (!JSC::Options::setOption(&arg[2])) {
hasBadJSCOptions = true;
dataLog("ERROR: invalid option: ", arg, "\n");
}
continue;
}
// This arg is not recognized by the VM nor by jsc. Pass it on to the
// script.
Script::ScriptType scriptType = isMJSFile(argv[i]) ? Script::ScriptType::Module : Script::ScriptType::Script;
m_scripts.append(Script(Script::StrictMode::Sloppy, Script::CodeSource::File, scriptType, argv[i]));
}
if (hasBadJSCOptions && JSC::Options::validateOptions())
CRASH();
if (m_scripts.isEmpty())
m_interactive = true;
for (; i < argc; ++i)
m_arguments.append(argv[i]);
if (dumpOptionsLevel != JSC::Options::DumpLevel::None) {
const char* optionsTitle = (dumpOptionsLevel == JSC::Options::DumpLevel::Overridden)
? "Modified JSC runtime options:"
: "All JSC runtime options:";
JSC::Options::dumpAllOptions(stderr, dumpOptionsLevel, optionsTitle);
}
JSC::Options::ensureOptionsAreCoherent();
if (needToExit)
jscExit(EXIT_SUCCESS);
}
template<typename Func>
int runJSC(const CommandLine& options, bool isWorker, const Func& func)
{
Worker worker(Workers::singleton());
VM& vm = VM::create(LargeHeap).leakRef();
if (!isWorker && options.m_canBlockIsFalse)
vm.m_typedArrayController = adoptRef(new JSC::SimpleTypedArrayController(false));
#if ENABLE(WEBASSEMBLY)
Wasm::enableFastMemory();
#endif
int result;
bool success = true;
GlobalObject* globalObject = nullptr;
{
JSLockHolder locker(vm);
startTimeoutThreadIfNeeded(vm);
if (options.m_profile && !vm.m_perBytecodeProfiler)
vm.m_perBytecodeProfiler = makeUnique<Profiler::Database>(vm);
globalObject = GlobalObject::create(vm, GlobalObject::createStructure(vm, jsNull()), options.m_arguments);
globalObject->setRemoteDebuggingEnabled(options.m_enableRemoteDebugging);
func(vm, globalObject, success);
vm.drainMicrotasks();
}
vm.deferredWorkTimer->runRunLoop();
{
JSLockHolder locker(vm);
if (options.m_interactive && success)
runInteractive(globalObject);
}
result = success && (asyncTestExpectedPasses == asyncTestPasses) ? 0 : 3;
if (options.m_exitCode) {
printf("jsc exiting %d", result);
if (asyncTestExpectedPasses != asyncTestPasses)
printf(" because expected: %d async test passes but got: %d async test passes", asyncTestExpectedPasses, asyncTestPasses);
printf("\n");
}
if (options.m_profile) {
JSLockHolder locker(vm);
if (!vm.m_perBytecodeProfiler->save(options.m_profilerOutput.utf8().data()))
fprintf(stderr, "could not save profiler output.\n");
}
#if ENABLE(JIT)
{
JSLockHolder locker(vm);
if (Options::useExceptionFuzz())
printf("JSC EXCEPTION FUZZ: encountered %u checks.\n", numberOfExceptionFuzzChecks());
bool fireAtEnabled =
Options::fireExecutableAllocationFuzzAt() || Options::fireExecutableAllocationFuzzAtOrAfter();
if (Options::useExecutableAllocationFuzz() && (!fireAtEnabled || Options::verboseExecutableAllocationFuzz()))
printf("JSC EXECUTABLE ALLOCATION FUZZ: encountered %u checks.\n", numberOfExecutableAllocationFuzzChecks());
if (Options::useOSRExitFuzz() && Options::verboseOSRExitFuzz()) {
printf("JSC OSR EXIT FUZZ: encountered %u static checks.\n", numberOfStaticOSRExitFuzzChecks());
printf("JSC OSR EXIT FUZZ: encountered %u dynamic checks.\n", numberOfOSRExitFuzzChecks());
}
auto compileTimeStats = JIT::compileTimeStats();
Vector<CString> compileTimeKeys;
for (auto& entry : compileTimeStats)
compileTimeKeys.append(entry.key);
std::sort(compileTimeKeys.begin(), compileTimeKeys.end());
for (const CString& key : compileTimeKeys) {
if (key.data())
printf("%40s: %.3lf ms\n", key.data(), compileTimeStats.get(key).milliseconds());
}
if (Options::reportTotalPhaseTimes())
logTotalPhaseTimes();
}
#endif
if (Options::gcAtEnd()) {
// We need to hold the API lock to do a GC.
JSLockHolder locker(&vm);
vm.heap.collectNow(Sync, CollectionScope::Full);
}
if (options.m_dumpSamplingProfilerData) {
#if ENABLE(SAMPLING_PROFILER)
JSLockHolder locker(&vm);
vm.samplingProfiler()->reportTopFunctions();
vm.samplingProfiler()->reportTopBytecodes();
#else
dataLog("Sampling profiler is not enabled on this platform\n");
#endif
}
vm.codeCache()->write(vm);
if (options.m_destroyVM || isWorker) {
JSLockHolder locker(vm);
// This is needed because we don't want the worker's main
// thread to die before its compilation threads finish.
vm.deref();
}
return result;
}
#if ENABLE(JIT_OPERATION_VALIDATION)
extern const uintptr_t startOfJITOperationsInShell __asm("section$start$__DATA_CONST$__jsc_ops");
extern const uintptr_t endOfJITOperationsInShell __asm("section$end$__DATA_CONST$__jsc_ops");
#endif
int jscmain(int argc, char** argv)
{
// Need to override and enable restricted options before we start parsing options below.
Config::enableRestrictedOptions();
WTF::initializeMainThread();
// Note that the options parsing can affect VM creation, and thus
// comes first.
CommandLine options(argc, argv);
{
Options::AllowUnfinalizedAccessScope scope;
processConfigFile(Options::configFile(), "jsc");
if (options.m_dump)
Options::dumpGeneratedBytecodes() = true;
}
JSC::initialize();
#if ENABLE(JIT_OPERATION_VALIDATION)
JSC::JITOperationList::populatePointersInEmbedder(&startOfJITOperationsInShell, &endOfJITOperationsInShell);
#endif
initializeTimeoutIfNeeded();
#if OS(DARWIN) || OS(LINUX)
startMemoryMonitoringThreadIfNeeded();
#endif
if (Options::useSuperSampler())
enableSuperSampler();
bool gigacageDisableRequested = false;
#if GIGACAGE_ENABLED && !COMPILER(MSVC)
if (char* gigacageEnabled = getenv("GIGACAGE_ENABLED")) {
if (!strcasecmp(gigacageEnabled, "no") || !strcasecmp(gigacageEnabled, "false") || !strcasecmp(gigacageEnabled, "0"))
gigacageDisableRequested = true;
}
#endif
if (!gigacageDisableRequested)
Gigacage::forbidDisablingPrimitiveGigacage();
#if PLATFORM(COCOA)
auto& memoryPressureHandler = MemoryPressureHandler::singleton();
{
dispatch_queue_t queue = dispatch_queue_create("jsc shell memory pressure handler", DISPATCH_QUEUE_SERIAL);
memoryPressureHandler.setDispatchQueue(queue);
dispatch_release(queue);
}
Box<Critical> memoryPressureCriticalState = Box<Critical>::create(Critical::No);
Box<Synchronous> memoryPressureSynchronousState = Box<Synchronous>::create(Synchronous::No);
memoryPressureHandler.setLowMemoryHandler([=] (Critical critical, Synchronous synchronous) {
crashIfExceedingMemoryLimit();
// We set these racily with respect to reading them from the JS execution thread.
*memoryPressureCriticalState = critical;
*memoryPressureSynchronousState = synchronous;
});
memoryPressureHandler.setShouldLogMemoryMemoryPressureEvents(false);
memoryPressureHandler.install();
auto onEachMicrotaskTick = [&] (VM& vm) {
if (*memoryPressureCriticalState == Critical::No)
return;
*memoryPressureCriticalState = Critical::No;
bool isSynchronous = *memoryPressureSynchronousState == Synchronous::Yes;
WTF::releaseFastMallocFreeMemory();
vm.deleteAllCode(DeleteAllCodeIfNotCollecting);
if (!vm.heap.isCurrentThreadBusy()) {
if (isSynchronous) {
vm.heap.collectNow(Sync, CollectionScope::Full);
WTF::releaseFastMallocFreeMemory();
} else
vm.heap.collectNowFullIfNotDoneRecently(Async);
}
};
#endif
int result = runJSC(
options, false,
[&] (VM& vm, GlobalObject* globalObject, bool& success) {
UNUSED_PARAM(vm);
#if PLATFORM(COCOA)
vm.setOnEachMicrotaskTick(WTFMove(onEachMicrotaskTick));
#endif
runWithOptions(globalObject, options, success);
});
printSuperSamplerState();
if (options.m_dumpMemoryFootprint) {
MemoryFootprint footprint = MemoryFootprint::now();
printf("Memory Footprint:\n Current Footprint: %" PRIu64 "\n Peak Footprint: %" PRIu64 "\n", footprint.current, footprint.peak);
}
return result;
}
#if OS(WINDOWS)
extern "C" __declspec(dllexport) int WINAPI dllLauncherEntryPoint(int argc, const char* argv[])
{
return main(argc, const_cast<char**>(argv));
}
#endif
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