#ifndef JSCell_h
#define JSCell_h
-#include "Collector.h"
-#include "JSImmediate.h"
-#include "JSValue.h"
+#include "CallData.h"
+#include "CallFrame.h"
+#include "ConstructData.h"
+#include "Heap.h"
+#include "JSLock.h"
+#include "JSValueInlineMethods.h"
#include "MarkStack.h"
-#include "Structure.h"
+#include "WriteBarrier.h"
#include <wtf/Noncopyable.h>
namespace JSC {
- class JSCell : public NoncopyableCustomAllocated {
+ class JSGlobalObject;
+ class Structure;
+
+#if COMPILER(MSVC)
+ // If WTF_MAKE_NONCOPYABLE is applied to JSCell we end up with a bunch of
+ // undefined references to the JSCell copy constructor and assignment operator
+ // when linking JavaScriptCore.
+ class MSVCBugWorkaround {
+ WTF_MAKE_NONCOPYABLE(MSVCBugWorkaround);
+
+ protected:
+ MSVCBugWorkaround() { }
+ ~MSVCBugWorkaround() { }
+ };
+
+ class JSCell : MSVCBugWorkaround {
+#else
+ class JSCell {
+ WTF_MAKE_NONCOPYABLE(JSCell);
+#endif
+
+ friend class ExecutableBase;
friend class GetterSetter;
friend class Heap;
- friend class JIT;
- friend class JSNumberCell;
friend class JSObject;
friend class JSPropertyNameIterator;
friend class JSString;
friend class JSAPIValueWrapper;
friend class JSZombie;
friend class JSGlobalData;
+ friend class MarkedSpace;
+ friend class MarkedBlock;
+ friend class ScopeChainNode;
+ friend class Structure;
+ friend class StructureChain;
+ friend class RegExp;
+ enum CreatingEarlyCellTag { CreatingEarlyCell };
+
+ protected:
+ enum VPtrStealingHackType { VPtrStealingHack };
private:
- explicit JSCell(Structure*);
+ explicit JSCell(VPtrStealingHackType) { }
+ JSCell(JSGlobalData&, Structure*);
+ JSCell(JSGlobalData&, Structure*, CreatingEarlyCellTag);
virtual ~JSCell();
+ static const ClassInfo s_dummyCellInfo;
public:
- static PassRefPtr<Structure> createDummyStructure()
- {
- return Structure::create(jsNull(), TypeInfo(UnspecifiedType), AnonymousSlotCount);
- }
+ static Structure* createDummyStructure(JSGlobalData&);
// Querying the type.
-#if USE(JSVALUE32)
- bool isNumber() const;
-#endif
bool isString() const;
bool isObject() const;
virtual bool isGetterSetter() const;
virtual bool toBoolean(ExecState*) const;
virtual double toNumber(ExecState*) const;
virtual UString toString(ExecState*) const;
- virtual JSObject* toObject(ExecState*) const;
+ virtual JSObject* toObject(ExecState*, JSGlobalObject*) const;
// Garbage collection.
void* operator new(size_t, ExecState*);
void* operator new(size_t, JSGlobalData*);
void* operator new(size_t, void* placementNewDestination) { return placementNewDestination; }
- virtual void markChildren(MarkStack&);
+ virtual void visitChildren(SlotVisitor&);
#if ENABLE(JSC_ZOMBIES)
virtual bool isZombie() const { return false; }
#endif
// Object operations, with the toObject operation included.
- virtual const ClassInfo* classInfo() const;
+ const ClassInfo* classInfo() const;
virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
virtual void put(ExecState*, unsigned propertyName, JSValue);
virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
// property names, we want a similar interface with appropriate optimizations.)
bool fastGetOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
+ static ptrdiff_t structureOffset()
+ {
+ return OBJECT_OFFSETOF(JSCell, m_structure);
+ }
+
+#if ENABLE(GC_VALIDATION)
+ Structure* unvalidatedStructure() { return m_structure.unvalidatedGet(); }
+#endif
+
protected:
static const unsigned AnonymousSlotCount = 0;
virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&);
- Structure* m_structure;
+ WriteBarrier<Structure> m_structure;
};
- inline JSCell::JSCell(Structure* structure)
- : m_structure(structure)
- {
- }
-
- inline JSCell::~JSCell()
+ inline JSCell::JSCell(JSGlobalData& globalData, Structure* structure)
+ : m_structure(globalData, this, structure)
{
+ ASSERT(m_structure);
}
-#if USE(JSVALUE32)
- inline bool JSCell::isNumber() const
+ inline JSCell::JSCell(JSGlobalData& globalData, Structure* structure, CreatingEarlyCellTag)
{
- return m_structure->typeInfo().type() == NumberType;
- }
+#if ENABLE(GC_VALIDATION)
+ if (structure)
#endif
-
- inline bool JSCell::isObject() const
- {
- return m_structure->typeInfo().type() == ObjectType;
+ m_structure.setEarlyValue(globalData, this, structure);
+ // Very first set of allocations won't have a real structure.
+ ASSERT(m_structure || !globalData.dummyMarkableCellStructure);
}
- inline bool JSCell::isString() const
+ inline JSCell::~JSCell()
{
- return m_structure->typeInfo().type() == StringType;
+#if ENABLE(GC_VALIDATION)
+ m_structure.clear();
+#endif
}
inline Structure* JSCell::structure() const
{
- return m_structure;
+ return m_structure.get();
}
- inline void JSCell::markChildren(MarkStack&)
+ inline void JSCell::visitChildren(SlotVisitor& visitor)
{
- }
-
- inline void* JSCell::operator new(size_t size, JSGlobalData* globalData)
- {
- return globalData->heap.allocate(size);
- }
-
- inline void* JSCell::operator new(size_t size, ExecState* exec)
- {
- return exec->heap()->allocate(size);
+ visitor.append(&m_structure);
}
// --- JSValue inlines ----------------------------
return isCell() ? asCell()->getString(exec) : UString();
}
+ template <typename Base> UString HandleConverter<Base, Unknown>::getString(ExecState* exec) const
+ {
+ return jsValue().getString(exec);
+ }
+
inline JSObject* JSValue::getObject() const
{
return isCell() ? asCell()->getObject() : 0;
}
- inline CallType JSValue::getCallData(CallData& callData)
+ inline CallType getCallData(JSValue value, CallData& callData)
{
- return isCell() ? asCell()->getCallData(callData) : CallTypeNone;
+ CallType result = value.isCell() ? value.asCell()->getCallData(callData) : CallTypeNone;
+ ASSERT(result == CallTypeNone || value.isValidCallee());
+ return result;
}
- inline ConstructType JSValue::getConstructData(ConstructData& constructData)
+ inline ConstructType getConstructData(JSValue value, ConstructData& constructData)
{
- return isCell() ? asCell()->getConstructData(constructData) : ConstructTypeNone;
+ ConstructType result = value.isCell() ? value.asCell()->getConstructData(constructData) : ConstructTypeNone;
+ ASSERT(result == ConstructTypeNone || value.isValidCallee());
+ return result;
}
ALWAYS_INLINE bool JSValue::getUInt32(uint32_t& v) const
return false;
}
-#if !USE(JSVALUE32_64)
- ALWAYS_INLINE JSCell* JSValue::asCell() const
- {
- ASSERT(isCell());
- return m_ptr;
- }
-#endif // !USE(JSVALUE32_64)
-
inline JSValue JSValue::toPrimitive(ExecState* exec, PreferredPrimitiveType preferredType) const
{
return isCell() ? asCell()->toPrimitive(exec, preferredType) : asValue();
return isUndefined() ? nonInlineNaN() : 0; // null and false both convert to 0.
}
- inline bool JSValue::needsThisConversion() const
- {
- if (UNLIKELY(!isCell()))
- return true;
- return asCell()->structure()->typeInfo().needsThisConversion();
- }
-
inline JSValue JSValue::getJSNumber()
{
if (isInt32() || isDouble())
inline JSObject* JSValue::toObject(ExecState* exec) const
{
- return isCell() ? asCell()->toObject(exec) : toObjectSlowCase(exec);
+ return isCell() ? asCell()->toObject(exec, exec->lexicalGlobalObject()) : toObjectSlowCase(exec, exec->lexicalGlobalObject());
}
- inline JSObject* JSValue::toThisObject(ExecState* exec) const
+ inline JSObject* JSValue::toObject(ExecState* exec, JSGlobalObject* globalObject) const
{
- return isCell() ? asCell()->toThisObject(exec) : toThisObjectSlowCase(exec);
+ return isCell() ? asCell()->toObject(exec, globalObject) : toObjectSlowCase(exec, globalObject);
}
- ALWAYS_INLINE void MarkStack::append(JSCell* cell)
- {
- ASSERT(!m_isCheckingForDefaultMarkViolation);
- ASSERT(cell);
- if (Heap::isCellMarked(cell))
- return;
- Heap::markCell(cell);
- if (cell->structure()->typeInfo().type() >= CompoundType)
- m_values.append(cell);
- }
-
- ALWAYS_INLINE void MarkStack::append(JSValue value)
+ inline JSObject* JSValue::toThisObject(ExecState* exec) const
{
- ASSERT(value);
- if (value.isCell())
- append(value.asCell());
+ return isCell() ? asCell()->toThisObject(exec) : toThisObjectSlowCase(exec);
}
inline Heap* Heap::heap(JSValue v)
inline Heap* Heap::heap(JSCell* c)
{
- return cellBlock(c)->heap;
+ return MarkedSpace::heap(c);
}
#if ENABLE(JSC_ZOMBIES)
inline bool JSValue::isZombie() const
{
- return isCell() && asCell() && asCell()->isZombie();
+ return isCell() && asCell() > (JSCell*)0x1ffffffffL && asCell()->isZombie();
}
#endif
+
+ inline void* MarkedBlock::allocate()
+ {
+ while (m_nextAtom < m_endAtom) {
+ if (!m_marks.testAndSet(m_nextAtom)) {
+ JSCell* cell = reinterpret_cast<JSCell*>(&atoms()[m_nextAtom]);
+ m_nextAtom += m_atomsPerCell;
+ cell->~JSCell();
+ return cell;
+ }
+ m_nextAtom += m_atomsPerCell;
+ }
+
+ return 0;
+ }
+
+ inline MarkedSpace::SizeClass& MarkedSpace::sizeClassFor(size_t bytes)
+ {
+ ASSERT(bytes && bytes < maxCellSize);
+ if (bytes < preciseCutoff)
+ return m_preciseSizeClasses[(bytes - 1) / preciseStep];
+ return m_impreciseSizeClasses[(bytes - 1) / impreciseStep];
+ }
+
+ inline void* MarkedSpace::allocate(size_t bytes)
+ {
+ SizeClass& sizeClass = sizeClassFor(bytes);
+ return allocateFromSizeClass(sizeClass);
+ }
+
+ inline void* Heap::allocate(size_t bytes)
+ {
+ ASSERT(globalData()->identifierTable == wtfThreadData().currentIdentifierTable());
+ ASSERT(JSLock::lockCount() > 0);
+ ASSERT(JSLock::currentThreadIsHoldingLock());
+ ASSERT(bytes <= MarkedSpace::maxCellSize);
+ ASSERT(m_operationInProgress == NoOperation);
+
+ m_operationInProgress = Allocation;
+ void* result = m_markedSpace.allocate(bytes);
+ m_operationInProgress = NoOperation;
+ if (result)
+ return result;
+
+ return allocateSlowCase(bytes);
+ }
+
+ inline void* JSCell::operator new(size_t size, JSGlobalData* globalData)
+ {
+ JSCell* result = static_cast<JSCell*>(globalData->heap.allocate(size));
+ result->m_structure.clear();
+ return result;
+ }
+
+ inline void* JSCell::operator new(size_t size, ExecState* exec)
+ {
+ JSCell* result = static_cast<JSCell*>(exec->heap()->allocate(size));
+ result->m_structure.clear();
+ return result;
+ }
+
} // namespace JSC
#endif // JSCell_h
projects / apple / javascriptcore.git / blobdiff