/*
- * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2009, 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 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 Computer, Inc. ("Apple") nor the names of
+ * 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.
*
#define JSActivation_h
#include "CodeBlock.h"
+#include "CopiedSpaceInlines.h"
#include "JSVariableObject.h"
-#include "RegisterFile.h"
-#include "SymbolTable.h"
#include "Nodes.h"
+#include "SymbolTable.h"
namespace JSC {
- class Arguments;
- class Register;
+class Register;
- class JSActivation : public JSVariableObject {
- typedef JSVariableObject Base;
- public:
- JSActivation(CallFrame*, NonNullPassRefPtr<FunctionExecutable>);
- virtual ~JSActivation();
-
- virtual void markChildren(MarkStack&);
+class JSActivation : public JSVariableObject {
+private:
+ JSActivation(VM&, CallFrame*, Register*, SymbolTable*);
+
+public:
+ typedef JSVariableObject Base;
- virtual bool isDynamicScope() const;
+ static JSActivation* create(VM& vm, CallFrame* callFrame, Register* registers, CodeBlock* codeBlock)
+ {
+ SymbolTable* symbolTable = codeBlock->symbolTable();
+ ASSERT(codeBlock->codeType() == FunctionCode);
+ JSActivation* activation = new (
+ NotNull,
+ allocateCell<JSActivation>(
+ vm.heap,
+ allocationSize(symbolTable)
+ )
+ ) JSActivation(vm, callFrame, registers, symbolTable);
+ activation->finishCreation(vm);
+ return activation;
+ }
+
+ static JSActivation* create(VM& vm, CallFrame* callFrame, CodeBlock* codeBlock)
+ {
+ return create(vm, callFrame, callFrame->registers() + codeBlock->framePointerOffsetToGetActivationRegisters(), codeBlock);
+ }
- virtual bool isActivationObject() const { return true; }
+ static void visitChildren(JSCell*, SlotVisitor&);
- virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
+ static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
+ static void getOwnNonIndexPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
- virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
+ static void put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
- virtual void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes);
- virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+ static bool deleteProperty(JSCell*, ExecState*, PropertyName);
- virtual JSObject* toThisObject(ExecState*) const;
+ static JSValue toThis(JSCell*, ExecState*, ECMAMode);
- void copyRegisters(Arguments* arguments);
-
- virtual const ClassInfo* classInfo() const { return &info; }
- static const ClassInfo info;
-
- static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(proto, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount); }
-
- protected:
- static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
-
- private:
- struct JSActivationData : public JSVariableObjectData {
- JSActivationData(NonNullPassRefPtr<FunctionExecutable> _functionExecutable, Register* registers)
- : JSVariableObjectData(_functionExecutable->generatedBytecode().symbolTable(), registers)
- , functionExecutable(_functionExecutable)
- {
- // We have to manually ref and deref the symbol table as JSVariableObjectData
- // doesn't know about SharedSymbolTable
- functionExecutable->generatedBytecode().sharedSymbolTable()->ref();
- }
- ~JSActivationData()
- {
- static_cast<SharedSymbolTable*>(symbolTable)->deref();
- }
-
- RefPtr<FunctionExecutable> functionExecutable;
- };
+ void tearOff(VM&);
- static JSValue argumentsGetter(ExecState*, const Identifier&, const PropertySlot&);
- NEVER_INLINE PropertySlot::GetValueFunc getArgumentsGetter();
-
- JSActivationData* d() const { return static_cast<JSActivationData*>(JSVariableObject::d); }
- };
-
- JSActivation* asActivation(JSValue);
-
- inline JSActivation* asActivation(JSValue value)
- {
- ASSERT(asObject(value)->inherits(&JSActivation::info));
- return static_cast<JSActivation*>(asObject(value));
- }
+ DECLARE_INFO;
+
+ static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto) { return Structure::create(vm, globalObject, proto, TypeInfo(ActivationObjectType, StructureFlags), info()); }
+
+ WriteBarrierBase<Unknown>& registerAt(int) const;
+ bool isValidIndex(int) const;
+ bool isValid(const SymbolTableEntry&) const;
+ bool isTornOff();
+ int registersOffset();
+ static int registersOffset(SymbolTable*);
+
+protected:
+ static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesVisitChildren | OverridesGetPropertyNames | Base::StructureFlags;
+
+private:
+ bool symbolTableGet(PropertyName, PropertySlot&);
+ bool symbolTableGet(PropertyName, PropertyDescriptor&);
+ bool symbolTableGet(PropertyName, PropertySlot&, bool& slotIsWriteable);
+ bool symbolTablePut(ExecState*, PropertyName, JSValue, bool shouldThrow);
+ bool symbolTablePutWithAttributes(VM&, PropertyName, JSValue, unsigned attributes);
+
+ static EncodedJSValue argumentsGetter(ExecState*, JSObject*, EncodedJSValue, PropertyName);
+
+ static size_t allocationSize(SymbolTable*);
+ static size_t storageOffset();
+
+ WriteBarrier<Unknown>* storage(); // captureCount() number of registers.
+};
+
+extern int activationCount;
+extern int allTheThingsCount;
+
+inline JSActivation::JSActivation(VM& vm, CallFrame* callFrame, Register* registers, SymbolTable* symbolTable)
+ : Base(
+ vm,
+ callFrame->lexicalGlobalObject()->activationStructure(),
+ registers,
+ callFrame->scope(),
+ symbolTable)
+{
+ WriteBarrier<Unknown>* storage = this->storage();
+ size_t captureCount = symbolTable->captureCount();
+ for (size_t i = 0; i < captureCount; ++i)
+ new (NotNull, &storage[i]) WriteBarrier<Unknown>;
+}
+
+JSActivation* asActivation(JSValue);
+
+inline JSActivation* asActivation(JSValue value)
+{
+ ASSERT(asObject(value)->inherits(JSActivation::info()));
+ return jsCast<JSActivation*>(asObject(value));
+}
+
+ALWAYS_INLINE JSActivation* Register::activation() const
+{
+ return asActivation(jsValue());
+}
+
+inline int JSActivation::registersOffset(SymbolTable* symbolTable)
+{
+ return storageOffset() + ((symbolTable->captureCount() - symbolTable->captureStart() - 1) * sizeof(WriteBarrier<Unknown>));
+}
+
+inline void JSActivation::tearOff(VM& vm)
+{
+ ASSERT(!isTornOff());
+
+ WriteBarrierBase<Unknown>* dst = reinterpret_cast_ptr<WriteBarrierBase<Unknown>*>(
+ reinterpret_cast<char*>(this) + registersOffset(symbolTable()));
+ WriteBarrierBase<Unknown>* src = m_registers;
+
+ int captureEnd = symbolTable()->captureEnd();
+ for (int i = symbolTable()->captureStart(); i > captureEnd; --i)
+ dst[i].set(vm, this, src[i].get());
+
+ m_registers = dst;
+ ASSERT(isTornOff());
+}
+
+inline bool JSActivation::isTornOff()
+{
+ return m_registers == reinterpret_cast_ptr<WriteBarrierBase<Unknown>*>(
+ reinterpret_cast<char*>(this) + registersOffset(symbolTable()));
+}
+
+inline size_t JSActivation::storageOffset()
+{
+ return WTF::roundUpToMultipleOf<sizeof(WriteBarrier<Unknown>)>(sizeof(JSActivation));
+}
+
+inline WriteBarrier<Unknown>* JSActivation::storage()
+{
+ return reinterpret_cast_ptr<WriteBarrier<Unknown>*>(
+ reinterpret_cast<char*>(this) + storageOffset());
+}
+
+inline size_t JSActivation::allocationSize(SymbolTable* symbolTable)
+{
+ size_t objectSizeInBytes = WTF::roundUpToMultipleOf<sizeof(WriteBarrier<Unknown>)>(sizeof(JSActivation));
+ size_t storageSizeInBytes = symbolTable->captureCount() * sizeof(WriteBarrier<Unknown>);
+ return objectSizeInBytes + storageSizeInBytes;
+}
+
+inline bool JSActivation::isValidIndex(int index) const
+{
+ if (index > symbolTable()->captureStart())
+ return false;
+ if (index <= symbolTable()->captureEnd())
+ return false;
+ return true;
+}
+
+inline bool JSActivation::isValid(const SymbolTableEntry& entry) const
+{
+ return isValidIndex(entry.getIndex());
+}
+
+inline WriteBarrierBase<Unknown>& JSActivation::registerAt(int index) const
+{
+ ASSERT(isValidIndex(index));
+ return Base::registerAt(index);
+}
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff