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jsc.cpp
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/*
* Copyright (C) 1999-2000 Harri Porten ([email protected])
* Copyright (C) 2004-2021 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 "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 "DeferTermination.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 "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 <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>
#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)
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;
UncheckedLock m_lock;
UncheckedCondition 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(functionDollarGC);
static JSC_DECLARE_HOST_FUNCTION(functionDollarClearKeptObjects);
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 };
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_profile { false };
bool m_treatWatchdogExceptionAsSuccess { false };
bool m_alwaysDumpUncaughtException { false };
bool m_dumpMemoryFootprint { false };
bool m_dumpLinkBufferStats { false };
bool m_dumpSamplingProfilerData { false };
bool m_enableRemoteDebugging { 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.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);
addFunction(vm, dollar, "gc", functionDollarGC, 0);
addFunction(vm, dollar, "clearKeptObjects", functionDollarClearKeptObjects, 0);
dollar->putDirect(vm, Identifier::fromString(vm, "global"), globalThis(), 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,
¤tScriptExecutionOwner,
&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, PropertyName))
{
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, PropertyName))
{
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 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.isLocalFile())
RELEASE_AND_RETURN(scope, 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("../"))
RELEASE_AND_RETURN(scope, 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())
RELEASE_AND_RETURN(scope, 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());
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();
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));
}