--- /dev/null
+/*
+ * Copyright (C) 2008, 2009, 2014, 2015 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 "JSLexicalEnvironment.h"
+
+#include "Interpreter.h"
+#include "JSFunction.h"
+#include "JSCInlines.h"
+
+using namespace std;
+
+namespace JSC {
+
+const ClassInfo JSLexicalEnvironment::s_info = { "JSLexicalEnvironment", &Base::s_info, 0, CREATE_METHOD_TABLE(JSLexicalEnvironment) };
+
+inline bool JSLexicalEnvironment::symbolTableGet(PropertyName propertyName, PropertySlot& slot)
+{
+ SymbolTableEntry entry = symbolTable()->inlineGet(propertyName.uid());
+ if (entry.isNull())
+ return false;
+
+ ScopeOffset offset = entry.scopeOffset();
+
+ // Defend against the inspector asking for a var after it has been optimized out.
+ if (!isValid(offset))
+ return false;
+
+ slot.setValue(this, DontEnum, variableAt(offset).get());
+ return true;
+}
+
+inline bool JSLexicalEnvironment::symbolTableGet(PropertyName propertyName, PropertyDescriptor& descriptor)
+{
+ SymbolTableEntry entry = symbolTable()->inlineGet(propertyName.uid());
+ if (entry.isNull())
+ return false;
+
+ ScopeOffset offset = entry.scopeOffset();
+
+ // Defend against the inspector asking for a var after it has been optimized out.
+ if (!isValid(offset))
+ return false;
+
+ descriptor.setDescriptor(variableAt(offset).get(), entry.getAttributes());
+ return true;
+}
+
+inline bool JSLexicalEnvironment::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;
+ WatchpointSet* set;
+ {
+ 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;
+ }
+ ScopeOffset offset = iter->value.scopeOffset();
+ // Defend against the inspector asking for a var after it has been optimized out.
+ if (!isValid(offset))
+ return false;
+ set = iter->value.watchpointSet();
+ reg = &variableAt(offset);
+ }
+ reg->set(vm, this, value);
+ if (set)
+ set->invalidate(VariableWriteFireDetail(this, propertyName)); // Don't mess around - if we had found this statically, we would have invalidated it.
+ return true;
+}
+
+void JSLexicalEnvironment::getOwnNonIndexPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
+{
+ JSLexicalEnvironment* thisObject = jsCast<JSLexicalEnvironment*>(object);
+
+ {
+ 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.scopeOffset()))
+ continue;
+ if (it->key->isSymbol() && !mode.includeSymbolProperties())
+ continue;
+ propertyNames.add(Identifier::fromUid(exec, it->key.get()));
+ }
+ }
+ // Skip the JSEnvironmentRecord implementation of getOwnNonIndexPropertyNames
+ JSObject::getOwnNonIndexPropertyNames(thisObject, exec, propertyNames, mode);
+}
+
+inline bool JSLexicalEnvironment::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());
+
+ ScopeOffset offset = entry.scopeOffset();
+ if (!isValid(offset))
+ return false;
+
+ entry.setAttributes(attributes);
+ reg = &variableAt(offset);
+ }
+ reg->set(vm, this, value);
+ return true;
+}
+
+bool JSLexicalEnvironment::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
+{
+ JSLexicalEnvironment* thisObject = jsCast<JSLexicalEnvironment*>(object);
+
+ 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 a
+ // lexical environment object getter properties or a prototype.
+ ASSERT(!thisObject->hasGetterSetterProperties());
+ ASSERT(thisObject->prototype().isNull());
+ return false;
+}
+
+void JSLexicalEnvironment::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
+{
+ JSLexicalEnvironment* thisObject = jsCast<JSLexicalEnvironment*>(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 lexicalEnvironment object.
+ ASSERT(!thisObject->hasGetterSetterProperties());
+ thisObject->putOwnDataProperty(exec->vm(), propertyName, value, slot);
+}
+
+bool JSLexicalEnvironment::deleteProperty(JSCell* cell, ExecState* exec, PropertyName propertyName)
+{
+ if (propertyName == exec->propertyNames().arguments)
+ return false;
+
+ return Base::deleteProperty(cell, exec, propertyName);
+}
+
+JSValue JSLexicalEnvironment::toThis(JSCell*, ExecState* exec, ECMAMode ecmaMode)
+{
+ if (ecmaMode == StrictMode)
+ return jsUndefined();
+ return exec->globalThisValue();
+}
+
+} // namespace JSC
projects / apple / javascriptcore.git / blobdiff