StructureStubInfo.h [plain text]
#ifndef StructureStubInfo_h
#define StructureStubInfo_h
#if ENABLE(JIT)
#include "Instruction.h"
#include "MacroAssembler.h"
#include "Opcode.h"
#include "Structure.h"
namespace JSC {
enum AccessType {
access_get_by_id_self,
access_get_by_id_proto,
access_get_by_id_chain,
access_get_by_id_self_list,
access_get_by_id_proto_list,
access_put_by_id_transition,
access_put_by_id_replace,
access_get_by_id,
access_put_by_id,
access_get_by_id_generic,
access_put_by_id_generic,
access_get_array_length,
access_get_string_length,
};
struct StructureStubInfo {
StructureStubInfo(AccessType accessType)
: accessType(accessType)
, seen(false)
{
}
void initGetByIdSelf(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure)
{
accessType = access_get_by_id_self;
u.getByIdSelf.baseObjectStructure.set(globalData, owner, baseObjectStructure);
}
void initGetByIdProto(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure, Structure* prototypeStructure)
{
accessType = access_get_by_id_proto;
u.getByIdProto.baseObjectStructure.set(globalData, owner, baseObjectStructure);
u.getByIdProto.prototypeStructure.set(globalData, owner, prototypeStructure);
}
void initGetByIdChain(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure, StructureChain* chain)
{
accessType = access_get_by_id_chain;
u.getByIdChain.baseObjectStructure.set(globalData, owner, baseObjectStructure);
u.getByIdChain.chain.set(globalData, owner, chain);
}
void initGetByIdSelfList(PolymorphicAccessStructureList* structureList, int listSize)
{
accessType = access_get_by_id_self_list;
u.getByIdProtoList.structureList = structureList;
u.getByIdProtoList.listSize = listSize;
}
void initGetByIdProtoList(PolymorphicAccessStructureList* structureList, int listSize)
{
accessType = access_get_by_id_proto_list;
u.getByIdProtoList.structureList = structureList;
u.getByIdProtoList.listSize = listSize;
}
void initPutByIdTransition(JSGlobalData& globalData, JSCell* owner, Structure* previousStructure, Structure* structure, StructureChain* chain)
{
accessType = access_put_by_id_transition;
u.putByIdTransition.previousStructure.set(globalData, owner, previousStructure);
u.putByIdTransition.structure.set(globalData, owner, structure);
u.putByIdTransition.chain.set(globalData, owner, chain);
}
void initPutByIdReplace(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure)
{
accessType = access_put_by_id_replace;
u.putByIdReplace.baseObjectStructure.set(globalData, owner, baseObjectStructure);
}
void deref();
void visitAggregate(SlotVisitor&);
bool seenOnce()
{
return seen;
}
void setSeen()
{
seen = true;
}
int accessType : 31;
int seen : 1;
union {
struct {
WriteBarrierBase<Structure> baseObjectStructure;
} getByIdSelf;
struct {
WriteBarrierBase<Structure> baseObjectStructure;
WriteBarrierBase<Structure> prototypeStructure;
} getByIdProto;
struct {
WriteBarrierBase<Structure> baseObjectStructure;
WriteBarrierBase<StructureChain> chain;
} getByIdChain;
struct {
PolymorphicAccessStructureList* structureList;
int listSize;
} getByIdSelfList;
struct {
PolymorphicAccessStructureList* structureList;
int listSize;
} getByIdProtoList;
struct {
WriteBarrierBase<Structure> previousStructure;
WriteBarrierBase<Structure> structure;
WriteBarrierBase<StructureChain> chain;
} putByIdTransition;
struct {
WriteBarrierBase<Structure> baseObjectStructure;
} putByIdReplace;
} u;
CodeLocationLabel stubRoutine;
CodeLocationCall callReturnLocation;
CodeLocationLabel hotPathBegin;
};
}
#endif
#endif // StructureStubInfo_h