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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2004-2008, 2012-2013, 2015 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 "ArrayPrototype.h"
#include "ButterflyInlines.h"
#include "BytecodeGenerator.h"
#include "CodeBlock.h"
#include "Completion.h"
#include "CopiedSpaceInlines.h"
#include "DFGPlan.h"
#include "Disassembler.h"
#include "Exception.h"
#include "ExceptionHelpers.h"
#include "HeapStatistics.h"
#include "InitializeThreading.h"
#include "Interpreter.h"
#include "JSArray.h"
#include "JSArrayBuffer.h"
#include "JSCInlines.h"
#include "JSFunction.h"
#include "JSInternalPromise.h"
#include "JSInternalPromiseDeferred.h"
#include "JSLock.h"
#include "JSNativeStdFunction.h"
#include "JSONObject.h"
#include "JSProxy.h"
#include "JSString.h"
#include "JSWASMModule.h"
#include "ProfilerDatabase.h"
#include "SamplingProfiler.h"
#include "SamplingTool.h"
#include "StackVisitor.h"
#include "StructureInlines.h"
#include "StructureRareDataInlines.h"
#include "TestRunnerUtils.h"
#include "TypeProfilerLog.h"
#include "WASMModuleParser.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <thread>
#include <wtf/CurrentTime.h>
#include <wtf/MainThread.h>
#include <wtf/StringPrintStream.h>
#include <wtf/text/StringBuilder.h>
#if OS(WINDOWS)
#include <direct.h>
#include <wtf/text/win/WCharStringExtras.h>
#else
#include <unistd.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 HAVE(SYS_TIME_H)
#include <sys/time.h>
#endif
#if HAVE(SIGNAL_H)
#include <signal.h>
#endif
#if COMPILER(MSVC)
#include <crtdbg.h>
#include <mmsystem.h>
#include <windows.h>
#endif
#if PLATFORM(IOS) && CPU(ARM_THUMB2)
#include <fenv.h>
#include <arm/arch.h>
#endif
#if PLATFORM(QT)
#include <QCoreApplication>
#include <QDateTime>
#endif
#if PLATFORM(EFL)
#include <Ecore.h>
#endif
#if !defined(PATH_MAX)
#define PATH_MAX 4096
#endif
using namespace JSC;
using namespace WTF;
namespace {
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);
}
class Element;
class ElementHandleOwner;
class Masuqerader;
class Root;
class RuntimeArray;
class Element : public JSNonFinalObject {
public:
Element(VM& vm, Structure* structure)
: Base(vm, structure)
{
}
typedef JSNonFinalObject Base;
static const bool needsDestruction = false;
Root* root() const { return m_root.get(); }
void setRoot(VM& vm, Root* root) { m_root.set(vm, this, root); }
static Element* create(VM& vm, JSGlobalObject* globalObject, Root* root)
{
Structure* structure = createStructure(vm, globalObject, jsNull());
Element* element = new (NotNull, allocateCell<Element>(vm.heap, sizeof(Element))) Element(vm, structure);
element->finishCreation(vm, root);
return element;
}
void finishCreation(VM&, Root*);
static void visitChildren(JSCell* cell, SlotVisitor& visitor)
{
Element* thisObject = jsCast<Element*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
visitor.append(&thisObject->m_root);
}
static ElementHandleOwner* handleOwner();
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
DECLARE_INFO;
private:
WriteBarrier<Root> m_root;
};
class ElementHandleOwner : public WeakHandleOwner {
public:
bool isReachableFromOpaqueRoots(Handle<JSC::Unknown> handle, void*, SlotVisitor& visitor) override
{
Element* element = jsCast<Element*>(handle.slot()->asCell());
return visitor.containsOpaqueRoot(element->root());
}
};
class Masquerader : public JSNonFinalObject {
public:
Masquerader(VM& vm, Structure* structure)
: Base(vm, structure)
{
}
typedef JSNonFinalObject Base;
static const unsigned StructureFlags = Base::StructureFlags | JSC::MasqueradesAsUndefined;
static Masquerader* create(VM& vm, JSGlobalObject* globalObject)
{
globalObject->masqueradesAsUndefinedWatchpoint()->fireAll("Masquerading object allocated");
Structure* structure = createStructure(vm, globalObject, jsNull());
Masquerader* result = new (NotNull, allocateCell<Masquerader>(vm.heap, sizeof(Masquerader))) Masquerader(vm, structure);
result->finishCreation(vm);
return result;
}
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
DECLARE_INFO;
};
class Root : public JSDestructibleObject {
public:
Root(VM& vm, Structure* structure)
: Base(vm, structure)
{
}
Element* element()
{
return m_element.get();
}
void setElement(Element* element)
{
Weak<Element> newElement(element, Element::handleOwner());
m_element.swap(newElement);
}
static Root* create(VM& vm, JSGlobalObject* globalObject)
{
Structure* structure = createStructure(vm, globalObject, jsNull());
Root* root = new (NotNull, allocateCell<Root>(vm.heap, sizeof(Root))) Root(vm, structure);
root->finishCreation(vm);
return root;
}
typedef JSDestructibleObject Base;
DECLARE_INFO;
static const bool needsDestruction = true;
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
static void visitChildren(JSCell* thisObject, SlotVisitor& visitor)
{
Base::visitChildren(thisObject, visitor);
visitor.addOpaqueRoot(thisObject);
}
private:
Weak<Element> m_element;
};
class ImpureGetter : public JSNonFinalObject {
public:
ImpureGetter(VM& vm, Structure* structure)
: Base(vm, structure)
{
}
DECLARE_INFO;
typedef JSNonFinalObject Base;
static const unsigned StructureFlags = Base::StructureFlags | JSC::GetOwnPropertySlotIsImpure | JSC::OverridesGetOwnPropertySlot;
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
static ImpureGetter* create(VM& vm, Structure* structure, JSObject* delegate)
{
ImpureGetter* getter = new (NotNull, allocateCell<ImpureGetter>(vm.heap, sizeof(ImpureGetter))) ImpureGetter(vm, structure);
getter->finishCreation(vm, delegate);
return getter;
}
void finishCreation(VM& vm, JSObject* delegate)
{
Base::finishCreation(vm);
if (delegate)
m_delegate.set(vm, this, delegate);
}
static bool getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName name, PropertySlot& slot)
{
ImpureGetter* thisObject = jsCast<ImpureGetter*>(object);
if (thisObject->m_delegate && thisObject->m_delegate->getPropertySlot(exec, name, slot))
return true;
return Base::getOwnPropertySlot(object, exec, name, slot);
}
static void visitChildren(JSCell* cell, SlotVisitor& visitor)
{
Base::visitChildren(cell, visitor);
ImpureGetter* thisObject = jsCast<ImpureGetter*>(cell);
visitor.append(&thisObject->m_delegate);
}
void setDelegate(VM& vm, JSObject* delegate)
{
m_delegate.set(vm, this, delegate);
}
private:
WriteBarrier<JSObject> m_delegate;
};
class CustomGetter : public JSNonFinalObject {
public:
CustomGetter(VM& vm, Structure* structure)
: Base(vm, structure)
{
}
DECLARE_INFO;
typedef JSNonFinalObject Base;
static const unsigned StructureFlags = Base::StructureFlags | JSC::OverridesGetOwnPropertySlot;
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
static CustomGetter* create(VM& vm, Structure* structure)
{
CustomGetter* getter = new (NotNull, allocateCell<CustomGetter>(vm.heap, sizeof(CustomGetter))) CustomGetter(vm, structure);
getter->finishCreation(vm);
return getter;
}
static bool getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
{
CustomGetter* thisObject = jsCast<CustomGetter*>(object);
if (propertyName == PropertyName(Identifier::fromString(exec, "customGetter"))) {
slot.setCacheableCustom(thisObject, DontDelete | ReadOnly | DontEnum, thisObject->customGetter);
return true;
}
return JSObject::getOwnPropertySlot(thisObject, exec, propertyName, slot);
}
private:
static EncodedJSValue customGetter(ExecState* exec, EncodedJSValue thisValue, PropertyName)
{
CustomGetter* thisObject = jsDynamicCast<CustomGetter*>(JSValue::decode(thisValue));
if (!thisObject)
return throwVMTypeError(exec);
bool shouldThrow = thisObject->get(exec, PropertyName(Identifier::fromString(exec, "shouldThrow"))).toBoolean(exec);
if (shouldThrow)
return throwVMTypeError(exec);
return JSValue::encode(jsNumber(100));
}
};
class RuntimeArray : public JSArray {
public:
typedef JSArray Base;
static const unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero | OverridesGetPropertyNames;
static RuntimeArray* create(ExecState* exec)
{
VM& vm = exec->vm();
JSGlobalObject* globalObject = exec->lexicalGlobalObject();
Structure* structure = createStructure(vm, globalObject, createPrototype(vm, globalObject));
RuntimeArray* runtimeArray = new (NotNull, allocateCell<RuntimeArray>(*exec->heap())) RuntimeArray(exec, structure);
runtimeArray->finishCreation(exec);
vm.heap.addFinalizer(runtimeArray, destroy);
return runtimeArray;
}
~RuntimeArray() { }
static void destroy(JSCell* cell)
{
static_cast<RuntimeArray*>(cell)->RuntimeArray::~RuntimeArray();
}
static const bool needsDestruction = false;
static bool getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
{
RuntimeArray* thisObject = jsCast<RuntimeArray*>(object);
if (propertyName == exec->propertyNames().length) {
slot.setCacheableCustom(thisObject, DontDelete | ReadOnly | DontEnum, thisObject->lengthGetter);
return true;
}
Optional<uint32_t> index = parseIndex(propertyName);
if (index && index.value() < thisObject->getLength()) {
slot.setValue(thisObject, DontDelete | DontEnum, jsNumber(thisObject->m_vector[index.value()]));
return true;
}
return JSObject::getOwnPropertySlot(thisObject, exec, propertyName, slot);
}
static bool getOwnPropertySlotByIndex(JSObject* object, ExecState* exec, unsigned index, PropertySlot& slot)
{
RuntimeArray* thisObject = jsCast<RuntimeArray*>(object);
if (index < thisObject->getLength()) {
slot.setValue(thisObject, DontDelete | DontEnum, jsNumber(thisObject->m_vector[index]));
return true;
}
return JSObject::getOwnPropertySlotByIndex(thisObject, exec, index, slot);
}
static NO_RETURN_DUE_TO_CRASH void put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&)
{
RELEASE_ASSERT_NOT_REACHED();
}
static NO_RETURN_DUE_TO_CRASH bool deleteProperty(JSCell*, ExecState*, PropertyName)
{
RELEASE_ASSERT_NOT_REACHED();
}
unsigned getLength() const { return m_vector.size(); }
DECLARE_INFO;
static ArrayPrototype* createPrototype(VM&, JSGlobalObject* globalObject)
{
return globalObject->arrayPrototype();
}
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info(), ArrayClass);
}
protected:
void finishCreation(ExecState* exec)
{
Base::finishCreation(exec->vm());
ASSERT(inherits(info()));
for (size_t i = 0; i < exec->argumentCount(); i++)
m_vector.append(exec->argument(i).toInt32(exec));
}
private:
RuntimeArray(ExecState* exec, Structure* structure)
: JSArray(exec->vm(), structure, 0)
{
}
static EncodedJSValue lengthGetter(ExecState* exec, EncodedJSValue thisValue, PropertyName)
{
RuntimeArray* thisObject = jsDynamicCast<RuntimeArray*>(JSValue::decode(thisValue));
if (!thisObject)
return throwVMTypeError(exec);
return JSValue::encode(jsNumber(thisObject->getLength()));
}
Vector<int> m_vector;
};
const ClassInfo Element::s_info = { "Element", &Base::s_info, 0, CREATE_METHOD_TABLE(Element) };
const ClassInfo Masquerader::s_info = { "Masquerader", &Base::s_info, 0, CREATE_METHOD_TABLE(Masquerader) };
const ClassInfo Root::s_info = { "Root", &Base::s_info, 0, CREATE_METHOD_TABLE(Root) };
const ClassInfo ImpureGetter::s_info = { "ImpureGetter", &Base::s_info, 0, CREATE_METHOD_TABLE(ImpureGetter) };
const ClassInfo CustomGetter::s_info = { "CustomGetter", &Base::s_info, 0, CREATE_METHOD_TABLE(CustomGetter) };
const ClassInfo RuntimeArray::s_info = { "RuntimeArray", &Base::s_info, 0, CREATE_METHOD_TABLE(RuntimeArray) };
ElementHandleOwner* Element::handleOwner()
{
static ElementHandleOwner* owner = 0;
if (!owner)
owner = new ElementHandleOwner();
return owner;
}
void Element::finishCreation(VM& vm, Root* root)
{
Base::finishCreation(vm);
setRoot(vm, root);
m_root->setElement(this);
}
}
static bool fillBufferWithContentsOfFile(const String& fileName, Vector<char>& buffer);
static EncodedJSValue JSC_HOST_CALL functionCreateProxy(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionCreateRuntimeArray(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionCreateImpureGetter(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionCreateCustomGetterObject(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionSetImpureGetterDelegate(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionSetElementRoot(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionCreateRoot(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionCreateElement(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionGetElement(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionPrint(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionDebug(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionDescribe(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionDescribeArray(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionJSCStack(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionGCAndSweep(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionFullGC(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionEdenGC(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionForceGCSlowPaths(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionHeapSize(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionAddressOf(ExecState*);
#ifndef NDEBUG
static EncodedJSValue JSC_HOST_CALL functionDumpCallFrame(ExecState*);
#endif
static EncodedJSValue JSC_HOST_CALL functionVersion(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionRun(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionLoad(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionReadFile(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionCheckSyntax(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionReadline(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionPreciseTime(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionNeverInlineFunction(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionNoDFG(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionOptimizeNextInvocation(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionNumberOfDFGCompiles(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionReoptimizationRetryCount(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionTransferArrayBuffer(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionFailNextNewCodeBlock(ExecState*);
static NO_RETURN_WITH_VALUE EncodedJSValue JSC_HOST_CALL functionQuit(ExecState*);
static NO_RETURN_DUE_TO_CRASH EncodedJSValue JSC_HOST_CALL functionAbort(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionFalse1(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionFalse2(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionUndefined1(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionUndefined2(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionIsInt32(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionEffectful42(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionIdentity(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionMakeMasquerader(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionHasCustomProperties(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionDumpTypesForAllVariables(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionFindTypeForExpression(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionReturnTypeFor(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionDumpBasicBlockExecutionRanges(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionHasBasicBlockExecuted(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionBasicBlockExecutionCount(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionEnableExceptionFuzz(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionDrainMicrotasks(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionIs32BitPlatform(ExecState*);
#if ENABLE(WEBASSEMBLY)
static EncodedJSValue JSC_HOST_CALL functionLoadWebAssembly(ExecState*);
#endif
static EncodedJSValue JSC_HOST_CALL functionLoadModule(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionCheckModuleSyntax(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionPlatformSupportsSamplingProfiler(ExecState*);
#if ENABLE(SAMPLING_PROFILER)
static EncodedJSValue JSC_HOST_CALL functionStartSamplingProfiler(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionSamplingProfilerStackTraces(ExecState*);
#endif
#if ENABLE(SAMPLING_FLAGS)
static EncodedJSValue JSC_HOST_CALL functionSetSamplingFlags(ExecState*);
static EncodedJSValue JSC_HOST_CALL functionClearSamplingFlags(ExecState*);
#endif
struct Script {
bool isFile;
char* argument;
Script(bool isFile, char *argument)
: isFile(isFile)
, argument(argument)
{
}
};
class CommandLine {
public:
CommandLine(int argc, char** argv)
{
parseArguments(argc, argv);
}
bool m_interactive { false };
bool m_dump { false };
bool m_module { false };
bool m_exitCode { false };
Vector<Script> m_scripts;
Vector<String> m_arguments;
bool m_profile { false };
String m_profilerOutput;
void parseArguments(int, char**);
};
static const char interactivePrompt[] = ">>> ";
class StopWatch {
public:
void start();
void stop();
long getElapsedMS(); // call stop() first
private:
double m_startTime;
double m_stopTime;
};
void StopWatch::start()
{
m_startTime = monotonicallyIncreasingTime();
}
void StopWatch::stop()
{
m_stopTime = monotonicallyIncreasingTime();
}
long StopWatch::getElapsedMS()
{
return static_cast<long>((m_stopTime - m_startTime) * 1000);
}
template<typename Vector>
static inline String stringFromUTF(const Vector& utf8)
{
return String::fromUTF8WithLatin1Fallback(utf8.data(), utf8.size());
}
template<typename Vector>
static inline SourceCode jscSource(const Vector& utf8, const String& filename)
{
String str = stringFromUTF(utf8);
return makeSource(str, filename);
}
class GlobalObject : public JSGlobalObject {
private:
GlobalObject(VM&, Structure*);
public:
typedef JSGlobalObject Base;
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);
vm.heap.addFinalizer(object, destroy);
return object;
}
static const bool needsDestruction = false;
DECLARE_INFO;
static const GlobalObjectMethodTable s_globalObjectMethodTable;
static Structure* createStructure(VM& vm, JSValue prototype)
{
return Structure::create(vm, 0, prototype, TypeInfo(GlobalObjectType, StructureFlags), info());
}
static RuntimeFlags javaScriptRuntimeFlags(const JSGlobalObject*) { return RuntimeFlags::createAllEnabled(); }
protected:
void finishCreation(VM& vm, const Vector<String>& arguments)
{
Base::finishCreation(vm);
addFunction(vm, "debug", functionDebug, 1);
addFunction(vm, "describe", functionDescribe, 1);
addFunction(vm, "describeArray", functionDescribeArray, 1);
addFunction(vm, "print", functionPrint, 1);
addFunction(vm, "quit", functionQuit, 0);
addFunction(vm, "abort", functionAbort, 0);
addFunction(vm, "gc", functionGCAndSweep, 0);
addFunction(vm, "fullGC", functionFullGC, 0);
addFunction(vm, "edenGC", functionEdenGC, 0);
addFunction(vm, "forceGCSlowPaths", functionForceGCSlowPaths, 0);
addFunction(vm, "gcHeapSize", functionHeapSize, 0);
addFunction(vm, "addressOf", functionAddressOf, 1);
#ifndef NDEBUG
addFunction(vm, "dumpCallFrame", functionDumpCallFrame, 0);
#endif
addFunction(vm, "version", functionVersion, 1);
addFunction(vm, "run", functionRun, 1);
addFunction(vm, "load", functionLoad, 1);
addFunction(vm, "readFile", functionReadFile, 1);
addFunction(vm, "checkSyntax", functionCheckSyntax, 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, "numberOfDFGCompiles", functionNumberOfDFGCompiles, 1);
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
addConstructableFunction(vm, "Root", functionCreateRoot, 0);
addConstructableFunction(vm, "Element", functionCreateElement, 1);
addFunction(vm, "getElement", functionGetElement, 1);
addFunction(vm, "setElementRoot", functionSetElementRoot, 2);
putDirectNativeFunction(vm, this, Identifier::fromString(&vm, "DFGTrue"), 0, functionFalse1, DFGTrueIntrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(&vm, "OSRExit"), 0, functionUndefined1, OSRExitIntrinsic, DontEnum);
putDirectNativeFunction(vm, this, Identifier::fromString(&vm, "isFinalTier"), 0, functionFalse2, 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, "fiatInt52"), 0, functionIdentity, FiatInt52Intrinsic, DontEnum);
addFunction(vm, "effectful42", functionEffectful42, 0);
addFunction(vm, "makeMasquerader", functionMakeMasquerader, 0);
addFunction(vm, "hasCustomProperties", functionHasCustomProperties, 0);
addFunction(vm, "createProxy", functionCreateProxy, 1);
addFunction(vm, "createRuntimeArray", functionCreateRuntimeArray, 0);
addFunction(vm, "createImpureGetter", functionCreateImpureGetter, 1);
addFunction(vm, "createCustomGetterObject", functionCreateCustomGetterObject, 0);
addFunction(vm, "setImpureGetterDelegate", functionSetImpureGetterDelegate, 2);
addFunction(vm, "dumpTypesForAllVariables", functionDumpTypesForAllVariables , 0);
addFunction(vm, "findTypeForExpression", functionFindTypeForExpression, 2);
addFunction(vm, "returnTypeFor", functionReturnTypeFor, 1);
addFunction(vm, "dumpBasicBlockExecutionRanges", functionDumpBasicBlockExecutionRanges , 0);
addFunction(vm, "hasBasicBlockExecuted", functionHasBasicBlockExecuted, 2);
addFunction(vm, "basicBlockExecutionCount", functionBasicBlockExecutionCount, 2);
addFunction(vm, "enableExceptionFuzz", functionEnableExceptionFuzz, 0);
addFunction(vm, "drainMicrotasks", functionDrainMicrotasks, 0);
addFunction(vm, "is32BitPlatform", functionIs32BitPlatform, 0);
#if ENABLE(WEBASSEMBLY)
addFunction(vm, "loadWebAssembly", functionLoadWebAssembly, 3);
#endif
addFunction(vm, "loadModule", functionLoadModule, 1);
addFunction(vm, "checkModuleSyntax", functionCheckModuleSyntax, 1);
addFunction(vm, "platformSupportsSamplingProfiler", functionPlatformSupportsSamplingProfiler, 0);
#if ENABLE(SAMPLING_PROFILER)
addFunction(vm, "startSamplingProfiler", functionStartSamplingProfiler, 0);
addFunction(vm, "samplingProfilerStackTraces", functionSamplingProfilerStackTraces, 0);
#endif
if (!arguments.isEmpty()) {
JSArray* array = constructEmptyArray(globalExec(), 0);
for (size_t i = 0; i < arguments.size(); ++i)
array->putDirectIndex(globalExec(), i, jsString(globalExec(), arguments[i]));
putDirect(vm, Identifier::fromString(globalExec(), "arguments"), array);
}
putDirect(vm, Identifier::fromString(globalExec(), "console"), jsUndefined());
}
void addFunction(VM& vm, const char* name, NativeFunction function, unsigned arguments)
{
Identifier identifier = Identifier::fromString(&vm, name);
putDirect(vm, identifier, JSFunction::create(vm, this, arguments, identifier.string(), function));
}
void addConstructableFunction(VM& vm, const char* name, NativeFunction function, unsigned arguments)
{
Identifier identifier = Identifier::fromString(&vm, name);
putDirect(vm, identifier, JSFunction::create(vm, this, arguments, identifier.string(), function, NoIntrinsic, function));
}
static JSInternalPromise* moduleLoaderResolve(JSGlobalObject*, ExecState*, JSValue, JSValue);
static JSInternalPromise* moduleLoaderFetch(JSGlobalObject*, ExecState*, JSValue);
};
const ClassInfo GlobalObject::s_info = { "global", &JSGlobalObject::s_info, nullptr, CREATE_METHOD_TABLE(GlobalObject) };
const GlobalObjectMethodTable GlobalObject::s_globalObjectMethodTable = { &allowsAccessFrom, &supportsLegacyProfiling, &supportsRichSourceInfo, &shouldInterruptScript, &javaScriptRuntimeFlags, 0, &shouldInterruptScriptBeforeTimeout, &moduleLoaderResolve, &moduleLoaderFetch, nullptr, nullptr, nullptr };
GlobalObject::GlobalObject(VM& vm, Structure* structure)
: JSGlobalObject(vm, structure, &s_globalObjectMethodTable)
{
}
static UChar pathSeparator()
{
#if OS(WINDOWS)
return '\\';
#else
return '/';
#endif
}
struct DirectoryName {
// In unix, it is "/". In Windows, it becomes a drive letter like "C:\"
String rootName;
// If the directory name is "/home/WebKit", this becomes "home/WebKit". If the directory name is "/", this becomes "".
String queryName;
};
struct ModuleName {
ModuleName(const String& moduleName);
bool startsWithRoot() const
{
return !queries.isEmpty() && queries[0].isEmpty();
}
Vector<String> queries;
};
ModuleName::ModuleName(const String& moduleName)
{
// A module name given from code is represented as the UNIX style path. Like, `./A/B.js`.
moduleName.split('/', true, queries);
}
static bool extractDirectoryName(const String& absolutePathToFile, DirectoryName& directoryName)
{
size_t firstSeparatorPosition = absolutePathToFile.find(pathSeparator());
if (firstSeparatorPosition == notFound)
return false;
directoryName.rootName = absolutePathToFile.substring(0, firstSeparatorPosition + 1); // Include the separator.
size_t lastSeparatorPosition = absolutePathToFile.reverseFind(pathSeparator());
ASSERT_WITH_MESSAGE(lastSeparatorPosition != notFound, "If the separator is not found, this function already returns when performing the forward search.");
if (firstSeparatorPosition == lastSeparatorPosition)
directoryName.queryName = StringImpl::empty();
else {
size_t queryStartPosition = firstSeparatorPosition + 1;
size_t queryLength = lastSeparatorPosition - queryStartPosition; // Not include the last separator.
directoryName.queryName = absolutePathToFile.substring(queryStartPosition, queryLength);
}
return true;
}
static bool currentWorkingDirectory(DirectoryName& directoryName)
{
#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 false;
// 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
auto buffer = std::make_unique<wchar_t[]>(bufferLength);
DWORD lengthNotIncludingNull = ::GetCurrentDirectoryW(bufferLength, buffer.get());
String directoryString = wcharToString(buffer.get(), lengthNotIncludingNull);
// We don't support network path like \\host\share\<path name>.
if (directoryString.startsWith("\\\\"))
return false;
#else
auto buffer = std::make_unique<char[]>(PATH_MAX);
if (!getcwd(buffer.get(), PATH_MAX))
return false;
String directoryString = String::fromUTF8(buffer.get());
#endif
if (directoryString.isEmpty())
return false;
if (directoryString[directoryString.length() - 1] == pathSeparator())
return extractDirectoryName(directoryString, directoryName);
// Append the seperator to represents the file name. extractDirectoryName only accepts the absolute file name.
return extractDirectoryName(makeString(directoryString, pathSeparator()), directoryName);
}
static String resolvePath(const DirectoryName& directoryName, const ModuleName& moduleName)
{
Vector<String> directoryPieces;
directoryName.queryName.split(pathSeparator(), false, directoryPieces);
// Only first '/' is recognized as the path from the root.
if (moduleName.startsWithRoot())
directoryPieces.clear();
for (const auto& query : moduleName.queries) {
if (query == String(ASCIILiteral(".."))) {
if (!directoryPieces.isEmpty())
directoryPieces.removeLast();
} else if (!query.isEmpty() && query != String(ASCIILiteral(".")))
directoryPieces.append(query);
}
StringBuilder builder;
builder.append(directoryName.rootName);
for (size_t i = 0; i < directoryPieces.size(); ++i) {
builder.append(directoryPieces[i]);
if (i + 1 != directoryPieces.size())
builder.append(pathSeparator());
}
return builder.toString();
}
JSInternalPromise* GlobalObject::moduleLoaderResolve(JSGlobalObject* globalObject, ExecState* exec, JSValue keyValue, JSValue referrerValue)
{
JSInternalPromiseDeferred* deferred = JSInternalPromiseDeferred::create(exec, globalObject);
const Identifier key = keyValue.toPropertyKey(exec);
if (exec->hadException()) {
JSValue exception = exec->exception();
exec->clearException();
return deferred->reject(exec, exception);
}
if (key.isSymbol())
return deferred->resolve(exec, keyValue);
DirectoryName directoryName;
if (referrerValue.isUndefined()) {
if (!currentWorkingDirectory(directoryName))
return deferred->reject(exec, createError(exec, ASCIILiteral("Could not resolve the current working directory.")));
} else {
const Identifier referrer = referrerValue.toPropertyKey(exec);
if (exec->hadException()) {
JSValue exception = exec->exception();
exec->clearException();
return deferred->reject(exec, exception);
}
if (referrer.isSymbol()) {
if (!currentWorkingDirectory(directoryName))
return deferred->reject(exec, createError(exec, ASCIILiteral("Could not resolve the current working directory.")));
} else {
// If the referrer exists, we assume that the referrer is the correct absolute path.
if (!extractDirectoryName(referrer.impl(), directoryName))
return deferred->reject(exec, createError(exec, makeString("Could not resolve the referrer name '", String(referrer.impl()), "'.")));
}
}
return deferred->resolve(exec, jsString(exec, resolvePath(directoryName, ModuleName(key.impl()))));
}
static void convertShebangToJSComment(Vector<char>& buffer)
{
if (buffer.size() >= 2) {
if (buffer[0] == '#' && buffer[1] == '!')
buffer[0] = buffer[1] = '/';
}
}
static bool fillBufferWithContentsOfFile(FILE* file, Vector<char>& buffer)
{
fseek(file, 0, SEEK_END);
size_t bufferCapacity = ftell(file);
fseek(file, 0, SEEK_SET);
buffer.resize(bufferCapacity);
size_t readSize = fread(buffer.data(), 1, buffer.size(), file);
return readSize == buffer.size();
}
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;
}
static bool fetchModuleFromLocalFileSystem(const String& fileName, Vector<char>& buffer)
{
// We assume that fileName is always an absolute path.
#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.