#ifndef JSActivation_h
#define JSActivation_h
#include "CodeBlock.h"
#include "JSVariableObject.h"
#include "SymbolTable.h"
#include "Nodes.h"
namespace JSC {
class Arguments;
class Register;
class JSActivation : public JSVariableObject {
private:
JSActivation(CallFrame*, FunctionExecutable*);
public:
typedef JSVariableObject Base;
static JSActivation* create(JSGlobalData& globalData, CallFrame* callFrame, FunctionExecutable* funcExec)
{
JSActivation* activation = new (NotNull, allocateCell<JSActivation>(globalData.heap)) JSActivation(callFrame, funcExec);
activation->finishCreation(callFrame);
return activation;
}
static void finalize(JSCell*);
static void visitChildren(JSCell*, SlotVisitor&);
bool isDynamicScope(bool& requiresDynamicChecks) const;
static bool getOwnPropertySlot(JSCell*, ExecState*, const Identifier&, PropertySlot&);
static void getOwnPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
static void put(JSCell*, ExecState*, const Identifier&, JSValue, PutPropertySlot&);
static void putDirectVirtual(JSObject*, ExecState*, const Identifier&, JSValue, unsigned attributes);
static bool deleteProperty(JSCell*, ExecState*, const Identifier& propertyName);
static JSObject* toThisObject(JSCell*, ExecState*);
void tearOff(JSGlobalData&);
static const ClassInfo s_info;
static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue proto) { return Structure::create(globalData, globalObject, proto, TypeInfo(ActivationObjectType, StructureFlags), &s_info); }
bool isValidScopedLookup(int index) { return index < m_numCapturedVars; }
protected:
void finishCreation(CallFrame*);
static const unsigned StructureFlags = IsEnvironmentRecord | OverridesGetOwnPropertySlot | OverridesVisitChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
private:
bool symbolTableGet(const Identifier&, PropertySlot&);
bool symbolTableGet(const Identifier&, PropertyDescriptor&);
bool symbolTableGet(const Identifier&, PropertySlot&, bool& slotIsWriteable);
bool symbolTablePut(ExecState*, const Identifier&, JSValue, bool shouldThrow);
bool symbolTablePutWithAttributes(JSGlobalData&, const Identifier&, JSValue, unsigned attributes);
static JSValue argumentsGetter(ExecState*, JSValue, const Identifier&);
NEVER_INLINE PropertySlot::GetValueFunc getArgumentsGetter();
int m_numCapturedArgs;
int m_numCapturedVars : 30;
bool m_isTornOff : 1;
bool m_requiresDynamicChecks : 1;
int m_argumentsRegister;
};
JSActivation* asActivation(JSValue);
inline JSActivation* asActivation(JSValue value)
{
ASSERT(asObject(value)->inherits(&JSActivation::s_info));
return jsCast<JSActivation*>(asObject(value));
}
ALWAYS_INLINE JSActivation* Register::activation() const
{
return asActivation(jsValue());
}
inline bool JSActivation::isDynamicScope(bool& requiresDynamicChecks) const
{
requiresDynamicChecks = m_requiresDynamicChecks;
return false;
}
inline void JSActivation::tearOff(JSGlobalData& globalData)
{
ASSERT(!m_registerArray);
ASSERT(m_numCapturedVars + m_numCapturedArgs);
int registerOffset = CallFrame::offsetFor(m_numCapturedArgs + 1);
size_t registerArraySize = registerOffset + m_numCapturedVars;
OwnArrayPtr<WriteBarrier<Unknown> > registerArray = adoptArrayPtr(new WriteBarrier<Unknown>[registerArraySize]);
WriteBarrier<Unknown>* registers = registerArray.get() + registerOffset;
int from = CallFrame::argumentOffset(m_numCapturedArgs - 1);
int to = m_numCapturedVars;
for (int i = from; i < to; ++i)
registers[i].set(globalData, this, m_registers[i].get());
setRegisters(registers, registerArray.release());
m_isTornOff = true;
}
}
#endif // JSActivation_h