+++ /dev/null
-/*
- * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Apple Inc. ("Apple") nor the names of
- * its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "JSActivation.h"
-
-#include "Arguments.h"
-#include "Interpreter.h"
-#include "JSFunction.h"
-#include "JSCInlines.h"
-
-using namespace std;
-
-namespace JSC {
-
-const ClassInfo JSActivation::s_info = { "JSActivation", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSActivation) };
-
-void JSActivation::visitChildren(JSCell* cell, SlotVisitor& visitor)
-{
- JSActivation* thisObject = jsCast<JSActivation*>(cell);
- ASSERT_GC_OBJECT_INHERITS(thisObject, info());
- COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
- ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
- Base::visitChildren(thisObject, visitor);
-
- // No need to mark our registers if they're still in the JSStack.
- if (!thisObject->isTornOff())
- return;
-
- for (int i = 0; i < thisObject->symbolTable()->captureCount(); ++i)
- visitor.append(&thisObject->storage()[i]);
-}
-
-inline bool JSActivation::symbolTableGet(PropertyName propertyName, PropertySlot& slot)
-{
- SymbolTableEntry entry = symbolTable()->inlineGet(propertyName.uid());
- if (entry.isNull())
- return false;
-
- // Defend against the inspector asking for a var after it has been optimized out.
- if (isTornOff() && !isValid(entry))
- return false;
-
- slot.setValue(this, DontEnum, registerAt(entry.getIndex()).get());
- return true;
-}
-
-inline bool JSActivation::symbolTableGet(PropertyName propertyName, PropertyDescriptor& descriptor)
-{
- SymbolTableEntry entry = symbolTable()->inlineGet(propertyName.uid());
- if (entry.isNull())
- return false;
-
- // Defend against the inspector asking for a var after it has been optimized out.
- if (isTornOff() && !isValid(entry))
- return false;
-
- descriptor.setDescriptor(registerAt(entry.getIndex()).get(), entry.getAttributes());
- return true;
-}
-
-inline bool JSActivation::symbolTablePut(ExecState* exec, PropertyName propertyName, JSValue value, bool shouldThrow)
-{
- VM& vm = exec->vm();
- ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
-
- WriteBarrierBase<Unknown>* reg;
- {
- GCSafeConcurrentJITLocker locker(symbolTable()->m_lock, exec->vm().heap);
- SymbolTable::Map::iterator iter = symbolTable()->find(locker, propertyName.uid());
- if (iter == symbolTable()->end(locker))
- return false;
- ASSERT(!iter->value.isNull());
- if (iter->value.isReadOnly()) {
- if (shouldThrow)
- throwTypeError(exec, StrictModeReadonlyPropertyWriteError);
- return true;
- }
- // Defend against the inspector asking for a var after it has been optimized out.
- if (isTornOff() && !isValid(iter->value))
- return false;
- if (VariableWatchpointSet* set = iter->value.watchpointSet())
- set->invalidate(); // Don't mess around - if we had found this statically, we would have invcalidated it.
- reg = ®isterAt(iter->value.getIndex());
- }
- reg->set(vm, this, value);
- return true;
-}
-
-void JSActivation::getOwnNonIndexPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
-{
- JSActivation* thisObject = jsCast<JSActivation*>(object);
-
- CallFrame* callFrame = CallFrame::create(reinterpret_cast<Register*>(thisObject->m_registers));
- if (mode == IncludeDontEnumProperties && !thisObject->isTornOff() && (callFrame->codeBlock()->usesArguments() || callFrame->codeBlock()->usesEval()))
- propertyNames.add(exec->propertyNames().arguments);
-
- {
- ConcurrentJITLocker locker(thisObject->symbolTable()->m_lock);
- SymbolTable::Map::iterator end = thisObject->symbolTable()->end(locker);
- for (SymbolTable::Map::iterator it = thisObject->symbolTable()->begin(locker); it != end; ++it) {
- if (it->value.getAttributes() & DontEnum && mode != IncludeDontEnumProperties)
- continue;
- if (!thisObject->isValid(it->value))
- continue;
- propertyNames.add(Identifier(exec, it->key.get()));
- }
- }
- // Skip the JSVariableObject implementation of getOwnNonIndexPropertyNames
- JSObject::getOwnNonIndexPropertyNames(thisObject, exec, propertyNames, mode);
-}
-
-inline bool JSActivation::symbolTablePutWithAttributes(VM& vm, PropertyName propertyName, JSValue value, unsigned attributes)
-{
- ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
-
- WriteBarrierBase<Unknown>* reg;
- {
- ConcurrentJITLocker locker(symbolTable()->m_lock);
- SymbolTable::Map::iterator iter = symbolTable()->find(locker, propertyName.uid());
- if (iter == symbolTable()->end(locker))
- return false;
- SymbolTableEntry& entry = iter->value;
- ASSERT(!entry.isNull());
- if (!isValid(entry))
- return false;
-
- entry.setAttributes(attributes);
- reg = ®isterAt(entry.getIndex());
- }
- reg->set(vm, this, value);
- return true;
-}
-
-bool JSActivation::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
-{
- JSActivation* thisObject = jsCast<JSActivation*>(object);
-
- if (propertyName == exec->propertyNames().arguments) {
- // Defend against the inspector asking for the arguments object after it has been optimized out.
- CallFrame* callFrame = CallFrame::create(reinterpret_cast<Register*>(thisObject->m_registers));
- if (!thisObject->isTornOff() && (callFrame->codeBlock()->usesArguments() || callFrame->codeBlock()->usesEval())) {
- slot.setCustom(thisObject, DontEnum, argumentsGetter);
- return true;
- }
- }
-
- if (thisObject->symbolTableGet(propertyName, slot))
- return true;
-
- unsigned attributes;
- if (JSValue value = thisObject->getDirect(exec->vm(), propertyName, attributes)) {
- slot.setValue(thisObject, attributes, value);
- return true;
- }
-
- // We don't call through to JSObject because there's no way to give an
- // activation object getter properties or a prototype.
- ASSERT(!thisObject->hasGetterSetterProperties());
- ASSERT(thisObject->prototype().isNull());
- return false;
-}
-
-void JSActivation::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
-{
- JSActivation* thisObject = jsCast<JSActivation*>(cell);
- ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(thisObject));
-
- if (thisObject->symbolTablePut(exec, propertyName, value, slot.isStrictMode()))
- return;
-
- // We don't call through to JSObject because __proto__ and getter/setter
- // properties are non-standard extensions that other implementations do not
- // expose in the activation object.
- ASSERT(!thisObject->hasGetterSetterProperties());
- thisObject->putOwnDataProperty(exec->vm(), propertyName, value, slot);
-}
-
-bool JSActivation::deleteProperty(JSCell* cell, ExecState* exec, PropertyName propertyName)
-{
- if (propertyName == exec->propertyNames().arguments)
- return false;
-
- return Base::deleteProperty(cell, exec, propertyName);
-}
-
-JSValue JSActivation::toThis(JSCell*, ExecState* exec, ECMAMode ecmaMode)
-{
- if (ecmaMode == StrictMode)
- return jsUndefined();
- return exec->globalThisValue();
-}
-
-EncodedJSValue JSActivation::argumentsGetter(ExecState*, JSObject* slotBase, EncodedJSValue, PropertyName)
-{
- JSActivation* activation = jsCast<JSActivation*>(slotBase);
- CallFrame* callFrame = CallFrame::create(reinterpret_cast<Register*>(activation->m_registers));
- ASSERT(!activation->isTornOff() && (callFrame->codeBlock()->usesArguments() || callFrame->codeBlock()->usesEval()));
- if (activation->isTornOff() || !(callFrame->codeBlock()->usesArguments() || callFrame->codeBlock()->usesEval()))
- return JSValue::encode(jsUndefined());
-
- VirtualRegister argumentsRegister = callFrame->codeBlock()->argumentsRegister();
- if (JSValue arguments = callFrame->uncheckedR(argumentsRegister.offset()).jsValue())
- return JSValue::encode(arguments);
- int realArgumentsRegister = unmodifiedArgumentsRegister(argumentsRegister).offset();
-
- JSValue arguments = JSValue(Arguments::create(callFrame->vm(), callFrame));
- callFrame->uncheckedR(argumentsRegister.offset()) = arguments;
- callFrame->uncheckedR(realArgumentsRegister) = arguments;
-
- ASSERT(callFrame->uncheckedR(realArgumentsRegister).jsValue().inherits(Arguments::info()));
- return JSValue::encode(callFrame->uncheckedR(realArgumentsRegister).jsValue());
-}
-
-} // namespace JSC
projects / apple / javascriptcore.git / blobdiff