JSValue JSFunction::callerGetter(ExecState* exec, JSValue slotBase, PropertyName) { JSFunction* thisObj = jsCast<JSFunction*>(slotBase); ASSERT(!thisObj->isHostFunction()); JSValue caller = exec->interpreter()->retrieveCallerFromVMCode(exec, thisObj); // See ES5.1 15.3.5.4 - Function.caller may not be used to retrieve a strict caller. if (!caller.isObject() || !asObject(caller)->inherits(&JSFunction::s_info)) return caller; JSFunction* function = jsCast<JSFunction*>(caller); if (function->isHostFunction() || !function->jsExecutable()->isStrictMode()) return caller; return throwTypeError(exec, ASCIILiteral("Function.caller used to retrieve strict caller")); }
bool JSFunction::getOwnPropertySlot(JSCell* cell, ExecState* exec, PropertyName propertyName, PropertySlot& slot) { JSFunction* thisObject = jsCast<JSFunction*>(cell); if (thisObject->isHostFunction()) return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (propertyName == exec->propertyNames().prototype) { JSGlobalData& globalData = exec->globalData(); PropertyOffset offset = thisObject->getDirectOffset(globalData, propertyName); if (!isValidOffset(offset)) { JSObject* prototype = constructEmptyObject(exec); prototype->putDirect(globalData, exec->propertyNames().constructor, thisObject, DontEnum); thisObject->putDirect(globalData, exec->propertyNames().prototype, prototype, DontDelete | DontEnum); offset = thisObject->getDirectOffset(globalData, exec->propertyNames().prototype); ASSERT(isValidOffset(offset)); } slot.setValue(thisObject, thisObject->getDirect(offset), offset); } if (propertyName == exec->propertyNames().arguments) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (!result) { thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); ASSERT(result); } return result; } slot.setCacheableCustom(thisObject, argumentsGetter); return true; } if (propertyName == exec->propertyNames().length) { slot.setCacheableCustom(thisObject, lengthGetter); return true; } if (propertyName == exec->propertyNames().name) { slot.setCacheableCustom(thisObject, nameGetter); return true; } if (propertyName == exec->propertyNames().caller) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (!result) { thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); ASSERT(result); } return result; } slot.setCacheableCustom(thisObject, callerGetter); return true; } return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); }
void VM::releaseExecutableMemory() { prepareToDiscardCode(); if (entryScope) { StackPreservingRecompiler recompiler; HeapIterationScope iterationScope(heap); HashSet<JSCell*> roots; heap.getConservativeRegisterRoots(roots); HashSet<JSCell*>::iterator end = roots.end(); for (HashSet<JSCell*>::iterator ptr = roots.begin(); ptr != end; ++ptr) { ScriptExecutable* executable = 0; JSCell* cell = *ptr; if (cell->inherits(ScriptExecutable::info())) executable = static_cast<ScriptExecutable*>(*ptr); else if (cell->inherits(JSFunction::info())) { JSFunction* function = jsCast<JSFunction*>(*ptr); if (function->isHostFunction()) continue; executable = function->jsExecutable(); } else continue; ASSERT(executable->inherits(ScriptExecutable::info())); executable->unlinkCalls(); if (executable->inherits(FunctionExecutable::info())) recompiler.currentlyExecutingFunctions.add(static_cast<FunctionExecutable*>(executable)); } heap.objectSpace().forEachLiveCell<StackPreservingRecompiler>(iterationScope, recompiler); } m_regExpCache->invalidateCode(); heap.collectAllGarbage(); }
JSValue JSFunction::argumentsGetter(ExecState* exec, JSValue slotBase, PropertyName) { JSFunction* thisObj = jsCast<JSFunction*>(slotBase); ASSERT(!thisObj->isHostFunction()); return retrieveArguments(exec, thisObj); }
void JSFunction::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot) { JSFunction* thisObject = jsCast<JSFunction*>(cell); if (thisObject->isHostFunction()) { Base::put(thisObject, exec, propertyName, value, slot); return; } if (propertyName == exec->propertyNames().prototype) { // Make sure prototype has been reified, such that it can only be overwritten // following the rules set out in ECMA-262 8.12.9. PropertySlot slot; thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, propertyName, slot); thisObject->m_allocationProfile.clear(); thisObject->m_allocationProfileWatchpoint.notifyWrite(); // Don't allow this to be cached, since a [[Put]] must clear m_allocationProfile. PutPropertySlot dontCache; Base::put(thisObject, exec, propertyName, value, dontCache); return; } if (thisObject->jsExecutable()->isStrictMode() && (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().caller)) { // This will trigger the property to be reified, if this is not already the case! bool okay = thisObject->hasProperty(exec, propertyName); ASSERT_UNUSED(okay, okay); Base::put(thisObject, exec, propertyName, value, slot); return; } if (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length || propertyName == exec->propertyNames().name || propertyName == exec->propertyNames().caller) { if (slot.isStrictMode()) throwTypeError(exec, StrictModeReadonlyPropertyWriteError); return; } Base::put(thisObject, exec, propertyName, value, slot); }
static CodeBlock* codeBlockFromArg(ExecState* exec) { VM& vm = exec->vm(); if (exec->argumentCount() < 1) return nullptr; JSValue value = exec->uncheckedArgument(0); CodeBlock* candidateCodeBlock = nullptr; if (value.isCell()) { JSFunction* func = jsDynamicCast<JSFunction*>(vm, value.asCell()); if (func) { if (func->isHostFunction()) candidateCodeBlock = nullptr; else candidateCodeBlock = func->jsExecutable()->eitherCodeBlock(); } } else if (value.isDouble()) { // If the value is a double, it may be an encoded CodeBlock* that came from // $vm.codeBlockForFrame(). We'll treat it as a candidate codeBlock and check if it's // valid below before using. candidateCodeBlock = reinterpret_cast<CodeBlock*>(bitwise_cast<uint64_t>(value.asDouble())); } if (candidateCodeBlock && JSDollarVMPrototype::isValidCodeBlock(exec, candidateCodeBlock)) return candidateCodeBlock; if (candidateCodeBlock) dataLog("Invalid codeBlock: ", RawPointer(candidateCodeBlock), " ", value, "\n"); else dataLog("Invalid codeBlock: ", value, "\n"); return nullptr; }
void JSGlobalData::releaseExecutableMemory() { if (dynamicGlobalObject) { StackPreservingRecompiler recompiler; HashSet<JSCell*> roots; heap.getConservativeRegisterRoots(roots); HashSet<JSCell*>::iterator end = roots.end(); for (HashSet<JSCell*>::iterator ptr = roots.begin(); ptr != end; ++ptr) { ScriptExecutable* executable = 0; JSCell* cell = *ptr; if (cell->inherits(&ScriptExecutable::s_info)) executable = static_cast<ScriptExecutable*>(*ptr); else if (cell->inherits(&JSFunction::s_info)) { JSFunction* function = jsCast<JSFunction*>(*ptr); if (function->isHostFunction()) continue; executable = function->jsExecutable(); } else continue; ASSERT(executable->inherits(&ScriptExecutable::s_info)); executable->unlinkCalls(); if (executable->inherits(&FunctionExecutable::s_info)) recompiler.currentlyExecutingFunctions.add(static_cast<FunctionExecutable*>(executable)); } heap.objectSpace().forEachCell<StackPreservingRecompiler>(recompiler); } m_regExpCache->invalidateCode(); heap.collectAllGarbage(); }
CallIdentifier createCallIdentifierFromFunctionImp(ExecState* exec, JSObject* function, const String& defaultSourceURL, int defaultLineNumber) { const String& name = getCalculatedDisplayName(exec, function); JSFunction* jsFunction = jsDynamicCast<JSFunction*>(function); if (jsFunction && !jsFunction->isHostFunction()) return CallIdentifier(name.isEmpty() ? AnonymousFunction : name, jsFunction->jsExecutable()->sourceURL(), jsFunction->jsExecutable()->lineNo()); return CallIdentifier(name.isEmpty() ? AnonymousFunction : name, defaultSourceURL, defaultLineNumber); }
bool JSFunction::deleteProperty(JSCell* cell, ExecState* exec, const Identifier& propertyName) { JSFunction* thisObject = jsCast<JSFunction*>(cell); if (thisObject->isHostFunction()) return Base::deleteProperty(thisObject, exec, propertyName); if (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length || propertyName == exec->propertyNames().prototype || propertyName == exec->propertyNames().caller) return false; return Base::deleteProperty(thisObject, exec, propertyName); }
BaseSamplerNode* SamplerApollo::willExecute(ExecState* exec, JSValue function, int32_t& lineNo) { ASSERT(lineNo == 0); if (!seenByProfiler(function)) return 0; JSObject* object = asObject(function); if (object->inherits(&JSFunction::info)) { JSFunction* jsFunction = asFunction(function); // we should take lineno only for non host functions // otherwise we end up with wrong line numbers for functions like // DOM functions, which should have 0 as line number // see bug 2587164 if (!jsFunction->isHostFunction()) lineNo = jsFunction->jsExecutable()->lineNo(); } BaseSamplerNode* samplerNode = getSamplerNodeFor(static_cast<JSCell*>(object)); if (!samplerNode) { // try to inject the object now // as it might have been created while sampling was disabled // this can happen when the sample buffer runs out of space ASSERT(exec->dynamicGlobalObject()); uint64_t globalObjectIdentifier = 0; JSGlobalObject* globalObject = exec->dynamicGlobalObject(); BaseSamplerNode* globalObjectSample = getSamplerNodeFor(globalObject); if (globalObjectSample) globalObjectIdentifier = globalObjectSample->identifier(); PassRefPtr<SamplerJSCellNode> samplerNodeRef = adoptRef(new SamplerJSCellNode(globalObjectIdentifier, static_cast<JSCell*>(object), sizeof(JSObject))); samplerNode = samplerNodeRef.get(); // the sampler might be stopped by the time we get here // and register node will not give an id // in this cases we just fail here if (!registerNode(samplerNodeRef)) return 0; } samplerDidEnterFunction(samplerNode->identifier(), lineNo); // do not increment invocationCount if sampling is paused // however, we called samplerDidEnterFunction because we need to keep the callstack in sync if (UNLIKELY(!samplingNow)) return samplerNode; samplerNode->willExecute(); return samplerNode; }
bool JSFunction::getOwnPropertySlot(JSCell* cell, ExecState* exec, const Identifier& propertyName, PropertySlot& slot) { JSFunction* thisObject = static_cast<JSFunction*>(cell); if (thisObject->isHostFunction()) return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (propertyName == exec->propertyNames().prototype) { WriteBarrierBase<Unknown>* location = thisObject->getDirectLocation(exec->globalData(), propertyName); if (!location) { JSObject* prototype = constructEmptyObject(exec, thisObject->globalObject()->emptyObjectStructure()); prototype->putDirect(exec->globalData(), exec->propertyNames().constructor, thisObject, DontEnum); PutPropertySlot slot; thisObject->putDirect(exec->globalData(), exec->propertyNames().prototype, prototype, DontDelete | DontEnum, false, slot); location = thisObject->getDirectLocation(exec->globalData(), exec->propertyNames().prototype); } slot.setValue(thisObject, location->get(), thisObject->offsetForLocation(location)); } if (propertyName == exec->propertyNames().arguments) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (!result) { thisObject->initializeGetterSetterProperty(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Getter | Setter); result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); ASSERT(result); } return result; } slot.setCacheableCustom(thisObject, argumentsGetter); return true; } if (propertyName == exec->propertyNames().length) { slot.setCacheableCustom(thisObject, lengthGetter); return true; } if (propertyName == exec->propertyNames().caller) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (!result) { thisObject->initializeGetterSetterProperty(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Getter | Setter); result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); ASSERT(result); } return result; } slot.setCacheableCustom(thisObject, callerGetter); return true; } return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); }
// ECMA 13.2.2 [[Construct]] ConstructType JSFunction::getConstructData(JSCell* cell, ConstructData& constructData) { JSFunction* thisObject = jsCast<JSFunction*>(cell); if (thisObject->isHostFunction()) { constructData.native.function = thisObject->nativeConstructor(); return ConstructTypeHost; } constructData.js.functionExecutable = thisObject->jsExecutable(); constructData.js.scope = thisObject->scope(); return ConstructTypeJS; }
CallType JSFunction::getCallData(JSCell* cell, CallData& callData) { JSFunction* thisObject = jsCast<JSFunction*>(cell); if (thisObject->isHostFunction()) { callData.native.function = thisObject->nativeFunction(); return CallTypeHost; } callData.js.functionExecutable = thisObject->jsExecutable(); callData.js.scope = thisObject->scope(); return CallTypeJS; }
bool JSFunction::deleteProperty(JSCell* cell, ExecState* exec, const Identifier& propertyName) { JSFunction* thisObject = jsCast<JSFunction*>(cell); // For non-host functions, don't let these properties by deleted - except by DefineOwnProperty. if (!thisObject->isHostFunction() && !exec->globalData().isInDefineOwnProperty() && (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length || propertyName == exec->propertyNames().prototype || propertyName == exec->propertyNames().caller)) return false; return Base::deleteProperty(thisObject, exec, propertyName); }
bool JSFunction::defineOwnProperty(JSObject* object, ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor, bool throwException) { JSFunction* thisObject = jsCast<JSFunction*>(object); if (thisObject->isHostFunction()) return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); if (propertyName == exec->propertyNames().prototype) { // Make sure prototype has been reified, such that it can only be overwritten // following the rules set out in ECMA-262 8.12.9. PropertySlot slot; thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, propertyName, slot); } else if (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length || propertyName == exec->propertyNames().caller) { if (!object->isExtensible()) { if (throwException) throwError(exec, createTypeError(exec, "Attempting to define property on object that is not extensible.")); return false; } if (descriptor.configurablePresent() && descriptor.configurable()) { if (throwException) throwError(exec, createTypeError(exec, "Attempting to configurable attribute of unconfigurable property.")); return false; } if (descriptor.enumerablePresent() && descriptor.enumerable()) { if (throwException) throwError(exec, createTypeError(exec, "Attempting to change enumerable attribute of unconfigurable property.")); return false; } if (descriptor.isAccessorDescriptor()) { if (throwException) throwError(exec, createTypeError(exec, "Attempting to change access mechanism for an unconfigurable property.")); return false; } if (descriptor.writablePresent() && descriptor.writable()) { if (throwException) throwError(exec, createTypeError(exec, "Attempting to change writable attribute of unconfigurable property.")); return false; } if (!descriptor.value()) return true; if (propertyName == exec->propertyNames().arguments && sameValue(exec, descriptor.value(), exec->interpreter()->retrieveArgumentsFromVMCode(exec, thisObject))) return true; if (propertyName == exec->propertyNames().length && sameValue(exec, descriptor.value(), jsNumber(thisObject->jsExecutable()->parameterCount()))) return true; if (propertyName == exec->propertyNames().caller && sameValue(exec, descriptor.value(), exec->interpreter()->retrieveCallerFromVMCode(exec, thisObject))) return true; if (throwException) throwError(exec, createTypeError(exec, "Attempting to change value of a readonly property.")); return false; } return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); }
bool JSFunction::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor) { JSFunction* thisObject = jsCast<JSFunction*>(object); if (thisObject->isHostFunction()) return Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); if (propertyName == exec->propertyNames().prototype) { PropertySlot slot; thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, propertyName, slot); return Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); } if (propertyName == exec->propertyNames().arguments) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); if (!result) { thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); result = Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); ASSERT(result); } return result; } descriptor.setDescriptor(exec->interpreter()->retrieveArgumentsFromVMCode(exec, thisObject), ReadOnly | DontEnum | DontDelete); return true; } if (propertyName == exec->propertyNames().length) { descriptor.setDescriptor(jsNumber(thisObject->jsExecutable()->parameterCount()), ReadOnly | DontEnum | DontDelete); return true; } if (propertyName == exec->propertyNames().name) { descriptor.setDescriptor(thisObject->jsExecutable()->nameValue(), ReadOnly | DontEnum | DontDelete); return true; } if (propertyName == exec->propertyNames().caller) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); if (!result) { thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); result = Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); ASSERT(result); } return result; } descriptor.setDescriptor(exec->interpreter()->retrieveCallerFromVMCode(exec, thisObject), ReadOnly | DontEnum | DontDelete); return true; } return Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); }
void JSFunction::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode) { JSFunction* thisObject = jsCast<JSFunction*>(object); if (!thisObject->isHostFunction() && (mode == IncludeDontEnumProperties)) { // Make sure prototype has been reified. PropertySlot slot; thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, exec->propertyNames().prototype, slot); propertyNames.add(exec->propertyNames().arguments); propertyNames.add(exec->propertyNames().caller); propertyNames.add(exec->propertyNames().length); } Base::getOwnPropertyNames(thisObject, exec, propertyNames, mode); }
EncodedJSValue JSFunction::callerGetter(ExecState* exec, JSObject* slotBase, EncodedJSValue, PropertyName) { JSFunction* thisObj = jsCast<JSFunction*>(slotBase); ASSERT(!thisObj->isHostFunction()); JSValue caller = retrieveCallerFunction(exec, thisObj); // See ES5.1 15.3.5.4 - Function.caller may not be used to retrieve a strict caller. if (!caller.isObject() || !asObject(caller)->inherits(JSFunction::info())) return JSValue::encode(caller); JSFunction* function = jsCast<JSFunction*>(caller); if (function->isHostOrBuiltinFunction() || !function->jsExecutable()->isStrictMode()) return JSValue::encode(caller); return JSValue::encode(throwTypeError(exec, ASCIILiteral("Function.caller used to retrieve strict caller"))); }
EncodedJSValue JSC_HOST_CALL functionProtoFuncToString(ExecState* exec) { JSValue thisValue = exec->hostThisValue(); if (thisValue.inherits(&JSFunction::info)) { JSFunction* function = asFunction(thisValue); if (function->isHostFunction()) return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "() {\n [native code]\n}")); FunctionExecutable* executable = function->jsExecutable(); UString sourceString = executable->source().toString(); insertSemicolonIfNeeded(sourceString); return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "(", executable->paramString(), ") ", sourceString)); } if (thisValue.inherits(&InternalFunction::info)) { InternalFunction* function = asInternalFunction(thisValue); return JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(exec), "() {\n [native code]\n}")); } return throwVMTypeError(exec); }
JSValue JSC_HOST_CALL functionProtoFuncToString(ExecState* exec, JSObject*, JSValue thisValue, const ArgList&) { if (thisValue.inherits(&JSFunction::info)) { JSFunction* function = asFunction(thisValue); if (!function->isHostFunction()) { FunctionExecutable* executable = function->jsExecutable(); UString sourceString = executable->source().toString(); insertSemicolonIfNeeded(sourceString); return jsString(exec, makeString("function ", function->name(exec), "(", executable->paramString(), ") ", sourceString)); } } if (thisValue.inherits(&InternalFunction::info)) { InternalFunction* function = asInternalFunction(thisValue); return jsString(exec, makeString("function ", function->name(exec), "() {\n [native code]\n}")); } #ifdef QT_BUILD_SCRIPT_LIB //same error message as in the old engine, and in mozilla return throwError(exec, TypeError, "Function.prototype.toString called on incompatible object"); #else return throwError(exec, TypeError); #endif }
void JSFunction::put(JSCell* cell, ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot) { JSFunction* thisObject = jsCast<JSFunction*>(cell); if (thisObject->isHostFunction()) { Base::put(thisObject, exec, propertyName, value, slot); return; } if (propertyName == exec->propertyNames().prototype) { // Make sure prototype has been reified, such that it can only be overwritten // following the rules set out in ECMA-262 8.12.9. PropertySlot slot; thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, propertyName, slot); } if (thisObject->jsExecutable()->isStrictMode() && (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().caller)) { // This will trigger the property to be reified, if this is not already the case! bool okay = thisObject->hasProperty(exec, propertyName); ASSERT_UNUSED(okay, okay); Base::put(thisObject, exec, propertyName, value, slot); return; } if (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length) return; Base::put(thisObject, exec, propertyName, value, slot); }
JSValue JSFunction::callerGetter(ExecState* exec, const Identifier&, const PropertySlot& slot) { JSFunction* thisObj = asFunction(slot.slotBase()); ASSERT(!thisObj->isHostFunction()); return exec->interpreter()->retrieveCaller(exec, thisObj); }
bool JSFunction::defineOwnProperty(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor, bool throwException) { JSFunction* thisObject = jsCast<JSFunction*>(object); if (thisObject->isHostFunction()) return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); if (propertyName == exec->propertyNames().prototype) { // Make sure prototype has been reified, such that it can only be overwritten // following the rules set out in ECMA-262 8.12.9. PropertySlot slot; thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, propertyName, slot); thisObject->m_allocationProfile.clear(); thisObject->m_allocationProfileWatchpoint.notifyWrite(); return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); } bool valueCheck; if (propertyName == exec->propertyNames().arguments) { if (thisObject->jsExecutable()->isStrictMode()) { if (!Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor)) thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); } valueCheck = !descriptor.value() || sameValue(exec, descriptor.value(), exec->interpreter()->retrieveArgumentsFromVMCode(exec, thisObject)); } else if (propertyName == exec->propertyNames().caller) { if (thisObject->jsExecutable()->isStrictMode()) { if (!Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor)) thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); } valueCheck = !descriptor.value() || sameValue(exec, descriptor.value(), exec->interpreter()->retrieveCallerFromVMCode(exec, thisObject)); } else if (propertyName == exec->propertyNames().length) valueCheck = !descriptor.value() || sameValue(exec, descriptor.value(), jsNumber(thisObject->jsExecutable()->parameterCount())); else if (propertyName == exec->propertyNames().name) valueCheck = !descriptor.value() || sameValue(exec, descriptor.value(), thisObject->jsExecutable()->nameValue()); else return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); if (descriptor.configurablePresent() && descriptor.configurable()) { if (throwException) throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to configurable attribute of unconfigurable property."))); return false; } if (descriptor.enumerablePresent() && descriptor.enumerable()) { if (throwException) throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change enumerable attribute of unconfigurable property."))); return false; } if (descriptor.isAccessorDescriptor()) { if (throwException) throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change access mechanism for an unconfigurable property."))); return false; } if (descriptor.writablePresent() && descriptor.writable()) { if (throwException) throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change writable attribute of unconfigurable property."))); return false; } if (!valueCheck) { if (throwException) throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change value of a readonly property."))); return false; } return true; }
JSValue JSFunction::argumentsGetter(ExecState* exec, JSValue slotBase, const Identifier&) { JSFunction* thisObj = asFunction(slotBase); ASSERT(!thisObj->isHostFunction()); return exec->interpreter()->retrieveArgumentsFromVMCode(exec, thisObj); }
JSValue JSFunction::nameGetter(ExecState*, JSValue slotBase, PropertyName) { JSFunction* thisObj = jsCast<JSFunction*>(slotBase); ASSERT(!thisObj->isHostFunction()); return thisObj->jsExecutable()->nameValue(); }
JSValue JSFunction::lengthGetter(ExecState*, JSValue slotBase, PropertyName) { JSFunction* thisObj = jsCast<JSFunction*>(slotBase); ASSERT(!thisObj->isHostFunction()); return jsNumber(thisObj->jsExecutable()->parameterCount()); }
JSValue JSFunction::lengthGetter(ExecState*, JSValue slotBase, const Identifier&) { JSFunction* thisObj = asFunction(slotBase); ASSERT(!thisObj->isHostFunction()); return jsNumber(thisObj->jsExecutable()->parameterCount()); }
JSValue JSFunction::lengthGetter(ExecState* exec, const Identifier&, const PropertySlot& slot) { JSFunction* thisObj = asFunction(slot.slotBase()); ASSERT(!thisObj->isHostFunction()); return jsNumber(exec, thisObj->jsExecutable()->parameterCount()); }