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jsc.cpp
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/*
* Copyright (C) 1999-2000 Harri Porten ([email protected])
* Copyright (C) 2004-2023 Apple Inc. All rights reserved.
* Copyright (C) 2006 Bjoern Graf ([email protected])
*
* 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 "APICast.h"
#include "ArrayBuffer.h"
#include "AtomicsObject.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 "DeferTermination.h"
#include "DeferredWorkTimer.h"
#include "Disassembler.h"
#include "Exception.h"
#include "ExceptionHelpers.h"
#include "GlobalObjectMethodTable.h"
#include "HeapSnapshotBuilder.h"
#include "InitializeThreading.h"
#include "Interpreter.h"
#include "JIT.h"
#include "JITOperationList.h"
#include "JITSizeStatistics.h"
#include "JSArray.h"
#include "JSArrayBuffer.h"
#include "JSBasePrivate.h"
#include "JSBigInt.h"
#include "JSFinalizationRegistry.h"
#include "JSFunction.h"
#include "JSFunctionInlines.h"
#include "JSInternalPromise.h"
#include "JSLock.h"
#include "JSNativeStdFunction.h"
#include "JSONObject.h"
#include "JSObjectInlines.h"
#include "JSScriptFetchParameters.h"
#include "JSSourceCode.h"
#include "JSString.h"
#include "JSTypedArrays.h"
#include "JSWebAssemblyInstance.h"
#include "JSWebAssemblyMemory.h"
#include "LLIntThunks.h"
#include "LinkBuffer.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 "VMTrapsInlines.h"
#include "WasmCapabilities.h"
#include "WasmFaultSignalHandler.h"
#include "WasmMemory.h"
#include <span>
#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/SafeStrerror.h>
#include <wtf/Scope.h>
#include <wtf/StringPrintStream.h>
#include <wtf/URL.h>
#include <wtf/WTFProcess.h>
#include <wtf/WallTime.h>
#include <wtf/text/Base64.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/threads/BinarySemaphore.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>
#include <wtf/OSObjectPtr.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)
exitProcess(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 = std::variant<ArrayBufferContents, RefPtr<SharedArrayBufferContents>>;
#else
using Content = std::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&, bool isMain);
~Worker();
void enqueue(const AbstractLocker&, RefPtr<Message>);
RefPtr<Message> dequeue();
bool isMain() const { return m_isMain; }
static Worker& current();
private:
static ThreadSpecific<Worker*>& currentWorker();
Workers& m_workers;
Deque<RefPtr<Message>> m_messages;
const bool m_isMain;
};
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(functionAtob);
static JSC_DECLARE_HOST_FUNCTION(functionBtoa);
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(functionCreateNonRopeNonAtomString);
static JSC_DECLARE_HOST_FUNCTION(functionPrintStdOut);
static JSC_DECLARE_HOST_FUNCTION(functionPrintStdErr);
static JSC_DECLARE_HOST_FUNCTION(functionPrettyPrint);
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(functionMemoryUsageStatistics);
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(functionWriteFile);
static JSC_DECLARE_HOST_FUNCTION(functionCheckSyntax);
static JSC_DECLARE_HOST_FUNCTION(functionOpenFile);
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(functionCallerIsBBQOrOMGCompiled);
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(functionCheckScriptSyntax);
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(functionDollarGC);
static JSC_DECLARE_HOST_FUNCTION(functionDollarClearKeptObjects);
static JSC_DECLARE_HOST_FUNCTION(functionDollarGlobalObjectFor);
static JSC_DECLARE_HOST_FUNCTION(functionDollarIsRemoteFunction);
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(functionWaiterListSize);
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 };
explicit 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_treatWatchdogExceptionAsSuccess { false };
bool m_alwaysDumpUncaughtException { false };
bool m_dumpMemoryFootprint { false };
bool m_dumpLinkBufferStats { false };
bool m_dumpSamplingProfilerData { false };
bool m_inspectable { false };
bool m_canBlockIsFalse { false };
void parseArguments(int, char**);
};
static LazyNeverDestroyed<CommandLine> mainCommandLine;
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)) 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, "atob"_s, functionAtob, 1);
addFunction(vm, "btoa"_s, functionBtoa, 1);
addFunction(vm, "debug"_s, functionDebug, 1);
addFunction(vm, "describe"_s, functionDescribe, 1);
addFunction(vm, "describeArray"_s, functionDescribeArray, 1);
addFunction(vm, "print"_s, functionPrintStdOut, 1);
addFunction(vm, "printErr"_s, functionPrintStdErr, 1);
addFunction(vm, "prettyPrint"_s, functionPrettyPrint, 1);
addFunction(vm, "quit"_s, functionQuit, 0);
addFunction(vm, "gc"_s, functionGCAndSweep, 0);
addFunction(vm, "fullGC"_s, functionFullGC, 0);
addFunction(vm, "edenGC"_s, functionEdenGC, 0);
addFunction(vm, "gcHeapSize"_s, functionHeapSize, 0);
addFunction(vm, "memoryUsageStatistics"_s, functionMemoryUsageStatistics, 0);
addFunction(vm, "MemoryFootprint"_s, functionCreateMemoryFootprint, 0);
addFunction(vm, "resetMemoryPeak"_s, functionResetMemoryPeak, 0);
addFunction(vm, "addressOf"_s, functionAddressOf, 1);
addFunction(vm, "version"_s, functionVersion, 1);
addFunction(vm, "run"_s, functionRun, 1);
addFunction(vm, "runString"_s, functionRunString, 1);
addFunction(vm, "load"_s, functionLoad, 1);
addFunction(vm, "loadString"_s, functionLoadString, 1);
addFunction(vm, "readFile"_s, functionReadFile, 2);
addFunction(vm, "read"_s, functionReadFile, 2);
addFunction(vm, "writeFile"_s, functionWriteFile, 2);
addFunction(vm, "write"_s, functionWriteFile, 2);
addFunction(vm, "checkSyntax"_s, functionCheckSyntax, 1);
addFunction(vm, "sleepSeconds"_s, functionSleepSeconds, 1);
addFunction(vm, "jscStack"_s, functionJSCStack, 1);
addFunction(vm, "openFile"_s, functionOpenFile, 1);
addFunction(vm, "readline"_s, functionReadline, 0);
addFunction(vm, "preciseTime"_s, functionPreciseTime, 0);
addFunction(vm, "neverInlineFunction"_s, functionNeverInlineFunction, 1);
addFunction(vm, "noInline"_s, functionNeverInlineFunction, 1);
addFunction(vm, "noDFG"_s, functionNoDFG, 1);
addFunction(vm, "noFTL"_s, functionNoFTL, 1);
addFunction(vm, "noOSRExitFuzzing"_s, functionNoOSRExitFuzzing, 1);
addFunction(vm, "numberOfDFGCompiles"_s, functionNumberOfDFGCompiles, 1);
addFunction(vm, "callerIsBBQOrOMGCompiled"_s, functionCallerIsBBQOrOMGCompiled, 0);
addFunction(vm, "jscOptions"_s, functionJSCOptions, 0);
addFunction(vm, "optimizeNextInvocation"_s, functionOptimizeNextInvocation, 1);
addFunction(vm, "reoptimizationRetryCount"_s, functionReoptimizationRetryCount, 1);
addFunction(vm, "transferArrayBuffer"_s, functionTransferArrayBuffer, 1);
addFunction(vm, "failNextNewCodeBlock"_s, functionFailNextNewCodeBlock, 1);
#if ENABLE(SAMPLING_FLAGS)
addFunction(vm, "setSamplingFlags"_s, functionSetSamplingFlags, 1);
addFunction(vm, "clearSamplingFlags"_s, functionClearSamplingFlags, 1);
#endif
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "OSRExit"_s), 0, functionUndefined1, ImplementationVisibility::Public, OSRExitIntrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "isFinalTier"_s), 0, functionFalse, ImplementationVisibility::Public, IsFinalTierIntrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "predictInt32"_s), 0, functionUndefined2, ImplementationVisibility::Public, SetInt32HeapPredictionIntrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "isInt32"_s), 0, functionIsInt32, ImplementationVisibility::Public, CheckInt32Intrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "isPureNaN"_s), 0, functionIsPureNaN, ImplementationVisibility::Public, CheckInt32Intrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(vm, "fiatInt52"_s), 0, functionIdentity, ImplementationVisibility::Public, FiatInt52Intrinsic, DontEnum);
addFunction(vm, "effectful42"_s, functionEffectful42, 0);
addFunction(vm, "makeMasquerader"_s, functionMakeMasquerader, 0);
addFunction(vm, "hasCustomProperties"_s, functionHasCustomProperties, 0);
addFunction(vm, "createGlobalObject"_s, functionCreateGlobalObject, 0);
addFunction(vm, "createHeapBigInt"_s, functionCreateHeapBigInt, 1);
#if USE(BIGINT32)
addFunction(vm, "createBigInt32"_s, functionCreateBigInt32, 1);
#endif
addFunction(vm, "useBigInt32"_s, functionUseBigInt32, 0);
addFunction(vm, "isBigInt32"_s, functionIsBigInt32, 1);
addFunction(vm, "isHeapBigInt"_s, functionIsHeapBigInt, 1);
addFunction(vm, "createNonRopeNonAtomString"_s, functionCreateNonRopeNonAtomString, 1);
addFunction(vm, "dumpTypesForAllVariables"_s, functionDumpTypesForAllVariables , 0);
addFunction(vm, "drainMicrotasks"_s, functionDrainMicrotasks, 0);
addFunction(vm, "setTimeout"_s, functionSetTimeout, 2);
addFunction(vm, "releaseWeakRefs"_s, functionReleaseWeakRefs, 0);
addFunction(vm, "finalizationRegistryLiveCount"_s, functionFinalizationRegistryLiveCount, 0);
addFunction(vm, "finalizationRegistryDeadCount"_s, functionFinalizationRegistryDeadCount, 0);
addFunction(vm, "getRandomSeed"_s, functionGetRandomSeed, 0);
addFunction(vm, "setRandomSeed"_s, functionSetRandomSeed, 1);
addFunction(vm, "isRope"_s, functionIsRope, 1);
addFunction(vm, "callerSourceOrigin"_s, functionCallerSourceOrigin, 0);
addFunction(vm, "is32BitPlatform"_s, functionIs32BitPlatform, 0);
addFunction(vm, "checkModuleSyntax"_s, functionCheckModuleSyntax, 1);
addFunction(vm, "checkScriptSyntax"_s, functionCheckScriptSyntax, 1);
addFunction(vm, "platformSupportsSamplingProfiler"_s, functionPlatformSupportsSamplingProfiler, 0);
addFunction(vm, "generateHeapSnapshot"_s, functionGenerateHeapSnapshot, 0);
addFunction(vm, "generateHeapSnapshotForGCDebugging"_s, functionGenerateHeapSnapshotForGCDebugging, 0);
addFunction(vm, "resetSuperSamplerState"_s, functionResetSuperSamplerState, 0);
addFunction(vm, "ensureArrayStorage"_s, functionEnsureArrayStorage, 0);
#if ENABLE(SAMPLING_PROFILER)
addFunction(vm, "startSamplingProfiler"_s, functionStartSamplingProfiler, 0);
addFunction(vm, "samplingProfilerStackTraces"_s, functionSamplingProfilerStackTraces, 0);
#endif
addFunction(vm, "maxArguments"_s, functionMaxArguments, 0);
addFunction(vm, "asyncTestStart"_s, functionAsyncTestStart, 1);
addFunction(vm, "asyncTestPassed"_s, functionAsyncTestPassed, 1);
#if ENABLE(WEBASSEMBLY)
addFunction(vm, "WebAssemblyMemoryMode"_s, 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"_s), array, DontEnum);
}
putDirect(vm, Identifier::fromString(vm, "console"_s), jsUndefined(), DontEnum);
Structure* plainObjectStructure = JSFinalObject::createStructure(vm, this, objectPrototype(), 0);
JSObject* dollar = JSFinalObject::create(vm, plainObjectStructure);
putDirect(vm, Identifier::fromString(vm, "$"_s), dollar, DontEnum);
putDirect(vm, Identifier::fromString(vm, "$262"_s), dollar, DontEnum);
addFunction(vm, dollar, "createRealm"_s, functionDollarCreateRealm, 0, static_cast<unsigned>(PropertyAttribute::None));
addFunction(vm, dollar, "detachArrayBuffer"_s, functionTransferArrayBuffer, 1, static_cast<unsigned>(PropertyAttribute::None));
addFunction(vm, dollar, "evalScript"_s, functionDollarEvalScript, 1, static_cast<unsigned>(PropertyAttribute::None));
addFunction(vm, dollar, "gc"_s, functionDollarGC, 0, static_cast<unsigned>(PropertyAttribute::None));
addFunction(vm, dollar, "clearKeptObjects"_s, functionDollarClearKeptObjects, 0, static_cast<unsigned>(PropertyAttribute::None));
addFunction(vm, dollar, "globalObjectFor"_s, functionDollarGlobalObjectFor, 1, static_cast<unsigned>(PropertyAttribute::None));
addFunction(vm, dollar, "isRemoteFunction"_s, functionDollarIsRemoteFunction, 1, static_cast<unsigned>(PropertyAttribute::None));
dollar->putDirect(vm, Identifier::fromString(vm, "global"_s), globalThis());
dollar->putDirectCustomAccessor(vm, Identifier::fromString(vm, "IsHTMLDDA"_s),
CustomGetterSetter::create(vm, accessorMakeMasquerader, nullptr),
static_cast<unsigned>(PropertyAttribute::CustomValue)
);
JSObject* agent = JSFinalObject::create(vm, plainObjectStructure);
dollar->putDirect(vm, Identifier::fromString(vm, "agent"_s), agent);
// 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"_s, functionDollarAgentStart, 1);
addFunction(vm, agent, "receiveBroadcast"_s, functionDollarAgentReceiveBroadcast, 1);
addFunction(vm, agent, "report"_s, functionDollarAgentReport, 1);
addFunction(vm, agent, "sleep"_s, functionDollarAgentSleep, 1);
addFunction(vm, agent, "broadcast"_s, functionDollarAgentBroadcast, 1);
addFunction(vm, agent, "getReport"_s, functionDollarAgentGetReport, 0);
addFunction(vm, agent, "leaving"_s, functionDollarAgentLeaving, 0);
addFunction(vm, agent, "monotonicNow"_s, functionDollarAgentMonotonicNow, 0);
addFunction(vm, "waiterListSize"_s, functionWaiterListSize, 2);
addFunction(vm, "waitForReport"_s, functionWaitForReport, 0);
addFunction(vm, "heapCapacity"_s, functionHeapCapacity, 0);
addFunction(vm, "flashHeapAccess"_s, functionFlashHeapAccess, 0);
addFunction(vm, "disableRichSourceInfo"_s, functionDisableRichSourceInfo, 0);
addFunction(vm, "mallocInALoop"_s, functionMallocInALoop, 0);
addFunction(vm, "totalCompileTime"_s, functionTotalCompileTime, 0);
addFunction(vm, "setUnhandledRejectionCallback"_s, functionSetUnhandledRejectionCallback, 1);
addFunction(vm, "asDoubleNumber"_s, functionAsDoubleNumber, 1);
addFunction(vm, "dropAllLocks"_s, functionDropAllLocks, 1);
if (Options::exposeCustomSettersOnGlobalObjectForTesting()) {
{
CustomGetterSetter* custom = CustomGetterSetter::create(vm, nullptr, testCustomAccessorSetter);
Identifier identifier = Identifier::fromString(vm, "testCustomAccessorSetter"_s);
this->putDirectCustomAccessor(vm, identifier, custom, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::CustomAccessor);
}
{
CustomGetterSetter* custom = CustomGetterSetter::create(vm, nullptr, testCustomValueSetter);
Identifier identifier = Identifier::fromString(vm, "testCustomValueSetter"_s);
this->putDirectCustomAccessor(vm, identifier, custom, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::CustomValue);
}
}
}
public:
static bool testCustomSetterImpl(JSGlobalObject* lexicalGlobalObject, GlobalObject* thisObject, EncodedJSValue encodedValue, ASCIILiteral 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, ASCIILiteral name, NativeFunction function, unsigned arguments, unsigned attributes = static_cast<unsigned>(PropertyAttribute::DontEnum))
{
Identifier identifier = Identifier::fromString(vm, name);
object->putDirect(vm, identifier, JSFunction::create(vm, this, arguments, identifier.string(), function, ImplementationVisibility::Public), attributes);
}
void addFunction(VM& vm, ASCIILiteral name, NativeFunction function, unsigned arguments, unsigned attributes = static_cast<unsigned>(PropertyAttribute::DontEnum))
{
addFunction(vm, this, name, function, arguments, attributes);
}
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"_s, &JSGlobalObject::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(GlobalObject) };
const GlobalObjectMethodTable GlobalObject::s_globalObjectMethodTable = {
&shellSupportsRichSourceInfo,
&shouldInterruptScript,
&javaScriptRuntimeFlags,
nullptr, // queueMicrotaskToEventLoop
&shouldInterruptScriptBeforeTimeout,
&moduleLoaderImportModule,
&moduleLoaderResolve,
&moduleLoaderFetch,
&moduleLoaderCreateImportMetaProperties,
nullptr, // moduleLoaderEvaluate
nullptr, // promiseRejectionTracker
&reportUncaughtExceptionAtEventLoop,
¤tScriptExecutionOwner,
&scriptExecutionStatus,
&reportViolationForUnsafeEval,
nullptr, // defaultLanguage
nullptr, // compileStreaming
nullptr, // instantinateStreaming
&deriveShadowRealmGlobalObject
};
GlobalObject::GlobalObject(VM& vm, Structure* structure)
: JSGlobalObject(vm, structure, &s_globalObjectMethodTable)
{
}
JSC_DEFINE_CUSTOM_SETTER(testCustomAccessorSetter, (JSGlobalObject* lexicalGlobalObject, EncodedJSValue thisValue, EncodedJSValue encodedValue, PropertyName))
{
RELEASE_ASSERT(JSValue::decode(thisValue).isCell());
JSCell* thisCell = JSValue::decode(thisValue).asCell();
RELEASE_ASSERT(thisCell->type() == GlobalProxyType);
GlobalObject* thisObject = jsDynamicCast<GlobalObject*>(jsCast<JSGlobalProxy*>(thisCell)->target());
RELEASE_ASSERT(thisObject);
return GlobalObject::testCustomSetterImpl(lexicalGlobalObject, thisObject, encodedValue, "_testCustomAccessorSetter"_s);
}
JSC_DEFINE_CUSTOM_SETTER(testCustomValueSetter, (JSGlobalObject* lexicalGlobalObject, EncodedJSValue thisValue, EncodedJSValue encodedValue, PropertyName))
{
RELEASE_ASSERT(JSValue::decode(thisValue).isCell());
JSCell* thisCell = JSValue::decode(thisValue).asCell();
GlobalObject* thisObject = jsDynamicCast<GlobalObject*>(thisCell);
RELEASE_ASSERT(thisObject);
return GlobalObject::testCustomSetterImpl(lexicalGlobalObject, thisObject, encodedValue, "_testCustomValueSetter"_s);
}
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("\\\\"_s))
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);
}
// FIXME: We may wish to support module specifiers beginning with a (back)slash on Windows. We could either:
// - align with V8 and SM: treat '/foo' as './foo'
// - align with PowerShell: treat '/foo' as 'C:/foo'
static bool isAbsolutePath(StringView path)
{
#if OS(WINDOWS)
// Just look for local drives like C:\.
return path.length() > 2 && isASCIIAlpha(path[0]) && path[1] == ':' && (path[2] == '\\' || path[2] == '/');
#else
return path.startsWith('/');
#endif
}
static bool isDottedRelativePath(StringView path)
{
#if OS(WINDOWS)
auto length = path.length();
if (length < 2 || path[0] != '.')
return false;
if (path[1] == '/' || path[1] == '\\')
return true;
return length > 2 && path[1] == '.' && (path[2] == '/' || path[2] == '\\');
#else
return path.startsWith("./"_s) || path.startsWith("../"_s);
#endif
}
static URL absoluteFileURL(const String& fileName)
{
if (isAbsolutePath(fileName))
return URL::fileURLWithFileSystemPath(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 scope = DECLARE_THROW_SCOPE(vm);
auto* promise = JSInternalPromise::create(vm, globalObject->internalPromiseStructure());
auto rejectWithError = [&](JSValue error) {
promise->reject(globalObject, error);
return promise;
};
auto referrer = sourceOrigin.url();
auto specifier = moduleNameValue->value(globalObject);
RETURN_IF_EXCEPTION(scope, promise->rejectWithCaughtException(globalObject, scope));
if (!referrer.protocolIsFile())
RELEASE_AND_RETURN(scope, rejectWithError(createError(globalObject, makeString("Could not resolve the referrer's path '"_s, referrer.string(), "', while trying to resolve module '"_s, specifier, "'."_s))));
auto assertions = JSC::retrieveAssertionsFromDynamicImportOptions(globalObject, parameters, { vm.propertyNames->type.impl() });
RETURN_IF_EXCEPTION(scope, promise->rejectWithCaughtException(globalObject, scope));
auto type = JSC::retrieveTypeAssertion(globalObject, assertions);
RETURN_IF_EXCEPTION(scope, promise->rejectWithCaughtException(globalObject, scope));
parameters = jsUndefined();
if (type)
parameters = JSScriptFetchParameters::create(vm, ScriptFetchParameters::create(type.value()));
auto result = JSC::importModule(globalObject, Identifier::fromString(vm, specifier), jsString(vm, referrer.string()), parameters, jsUndefined());
RETURN_IF_EXCEPTION(scope, promise->rejectWithCaughtException(globalObject, scope));
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();
bool specifierIsAbsolute = isAbsolutePath(specifier);
if (!specifierIsAbsolute && !isDottedRelativePath(specifier)) {
throwTypeError(globalObject, scope, makeString("Module specifier, '"_s, specifier, "' is not absolute and does not start with \"./\" or \"../\". Referenced from: "_s, directoryURL.fileSystemPath()));
return { };
}
if (!directoryURL.protocolIsFile()) {
throwException(globalObject, scope, createError(globalObject, makeString("Could not resolve the referrer's path: "_s, directoryURL.string())));
return { };
}
auto resolvedURL = specifierIsAbsolute ? URL::fileURLWithFileSystemPath(specifier) : URL(directoryURL, specifier);
if (!resolvedURL.isValid()) {
throwException(globalObject, scope, createError(globalObject, makeString("Resolved module url is not valid: "_s, resolvedURL.string())));
return { };
}
ASSERT(resolvedURL.protocolIsFile());
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.protocolIsFile());
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)
{