/*
- * Copyright (C) 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2012, 2013, 2014 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
#ifndef StructureStubInfo_h
#define StructureStubInfo_h
+#include "CodeOrigin.h"
#include "Instruction.h"
+#include "JITStubRoutine.h"
+#include "MacroAssembler.h"
#include "Opcode.h"
+#include "PolymorphicAccessStructureList.h"
+#include "RegisterSet.h"
+#include "SpillRegistersMode.h"
#include "Structure.h"
+#include "StructureStubClearingWatchpoint.h"
+#include <wtf/OwnPtr.h>
namespace JSC {
#if ENABLE(JIT)
- struct StructureStubInfo {
- StructureStubInfo(OpcodeID opcodeID)
- : opcodeID(opcodeID)
- , stubRoutine(0)
- , callReturnLocation(0)
- , hotPathBegin(0)
- {
- }
- void initGetByIdSelf(Structure* baseObjectStructure)
- {
- opcodeID = op_get_by_id_self;
+class PolymorphicGetByIdList;
+class PolymorphicPutByIdList;
- u.getByIdSelf.baseObjectStructure = baseObjectStructure;
- baseObjectStructure->ref();
- }
+enum AccessType {
+ access_get_by_id_self,
+ access_get_by_id_chain,
+ access_get_by_id_list,
+ access_put_by_id_transition_normal,
+ access_put_by_id_transition_direct,
+ access_put_by_id_replace,
+ access_put_by_id_list,
+ access_unset,
+ access_in_list
+};
- void initGetByIdProto(Structure* baseObjectStructure, Structure* prototypeStructure)
- {
- opcodeID = op_get_by_id_proto;
-
- u.getByIdProto.baseObjectStructure = baseObjectStructure;
- baseObjectStructure->ref();
+inline bool isGetByIdAccess(AccessType accessType)
+{
+ switch (accessType) {
+ case access_get_by_id_self:
+ case access_get_by_id_chain:
+ case access_get_by_id_list:
+ return true;
+ default:
+ return false;
+ }
+}
+
+inline bool isPutByIdAccess(AccessType accessType)
+{
+ switch (accessType) {
+ case access_put_by_id_transition_normal:
+ case access_put_by_id_transition_direct:
+ case access_put_by_id_replace:
+ case access_put_by_id_list:
+ return true;
+ default:
+ return false;
+ }
+}
- u.getByIdProto.prototypeStructure = prototypeStructure;
- prototypeStructure->ref();
- }
+inline bool isInAccess(AccessType accessType)
+{
+ switch (accessType) {
+ case access_in_list:
+ return true;
+ default:
+ return false;
+ }
+}
- void initGetByIdChain(Structure* baseObjectStructure, StructureChain* chain)
- {
- opcodeID = op_get_by_id_chain;
+struct StructureStubInfo {
+ StructureStubInfo()
+ : accessType(access_unset)
+ , seen(false)
+ , resetByGC(false)
+ {
+ }
- u.getByIdChain.baseObjectStructure = baseObjectStructure;
- baseObjectStructure->ref();
+ void initGetByIdSelf(VM& vm, JSCell* owner, Structure* baseObjectStructure)
+ {
+ accessType = access_get_by_id_self;
- u.getByIdChain.chain = chain;
- chain->ref();
- }
+ u.getByIdSelf.baseObjectStructure.set(vm, owner, baseObjectStructure);
+ }
- void initGetByIdSelfList(PolymorphicAccessStructureList* structureList, int listSize)
- {
- opcodeID = op_get_by_id_self_list;
+ void initGetByIdChain(VM& vm, JSCell* owner, Structure* baseObjectStructure, StructureChain* chain, unsigned count, bool isDirect)
+ {
+ accessType = access_get_by_id_chain;
- u.getByIdProtoList.structureList = structureList;
- u.getByIdProtoList.listSize = listSize;
- }
+ u.getByIdChain.baseObjectStructure.set(vm, owner, baseObjectStructure);
+ u.getByIdChain.chain.set(vm, owner, chain);
+ u.getByIdChain.count = count;
+ u.getByIdChain.isDirect = isDirect;
+ }
- void initGetByIdProtoList(PolymorphicAccessStructureList* structureList, int listSize)
- {
- opcodeID = op_get_by_id_proto_list;
+ void initGetByIdList(PolymorphicGetByIdList* list)
+ {
+ accessType = access_get_by_id_list;
+ u.getByIdList.list = list;
+ }
- u.getByIdProtoList.structureList = structureList;
- u.getByIdProtoList.listSize = listSize;
- }
+ // PutById*
- // PutById*
+ void initPutByIdTransition(VM& vm, JSCell* owner, Structure* previousStructure, Structure* structure, StructureChain* chain, bool isDirect)
+ {
+ if (isDirect)
+ accessType = access_put_by_id_transition_direct;
+ else
+ accessType = access_put_by_id_transition_normal;
- void initPutByIdTransition(Structure* previousStructure, Structure* structure, StructureChain* chain)
- {
- opcodeID = op_put_by_id_transition;
+ u.putByIdTransition.previousStructure.set(vm, owner, previousStructure);
+ u.putByIdTransition.structure.set(vm, owner, structure);
+ u.putByIdTransition.chain.set(vm, owner, chain);
+ }
- u.putByIdTransition.previousStructure = previousStructure;
- previousStructure->ref();
+ void initPutByIdReplace(VM& vm, JSCell* owner, Structure* baseObjectStructure)
+ {
+ accessType = access_put_by_id_replace;
+
+ u.putByIdReplace.baseObjectStructure.set(vm, owner, baseObjectStructure);
+ }
+
+ void initPutByIdList(PolymorphicPutByIdList* list)
+ {
+ accessType = access_put_by_id_list;
+ u.putByIdList.list = list;
+ }
+
+ void initInList(PolymorphicAccessStructureList* list, int listSize)
+ {
+ accessType = access_in_list;
+ u.inList.structureList = list;
+ u.inList.listSize = listSize;
+ }
+
+ void reset()
+ {
+ deref();
+ accessType = access_unset;
+ stubRoutine.clear();
+ watchpoints.clear();
+ }
- u.putByIdTransition.structure = structure;
- structure->ref();
+ void deref();
- u.putByIdTransition.chain = chain;
- chain->ref();
- }
+ // Check if the stub has weak references that are dead. If there are dead ones that imply
+ // that the stub should be entirely reset, this should return false. If there are dead ones
+ // that can be handled internally by the stub and don't require a full reset, then this
+ // should reset them and return true. If there are no dead weak references, return true.
+ // If this method returns true it means that it has left the stub in a state where all
+ // outgoing GC pointers are known to point to currently marked objects; this method is
+ // allowed to accomplish this by either clearing those pointers somehow or by proving that
+ // they have already been marked. It is not allowed to mark new objects.
+ bool visitWeakReferences(RepatchBuffer&);
+
+ bool seenOnce()
+ {
+ return seen;
+ }
- void initPutByIdReplace(Structure* baseObjectStructure)
- {
- opcodeID = op_put_by_id_replace;
+ void setSeen()
+ {
+ seen = true;
+ }
+
+ StructureStubClearingWatchpoint* addWatchpoint(CodeBlock* codeBlock)
+ {
+ return WatchpointsOnStructureStubInfo::ensureReferenceAndAddWatchpoint(
+ watchpoints, codeBlock, this);
+ }
- u.putByIdReplace.baseObjectStructure = baseObjectStructure;
- baseObjectStructure->ref();
- }
-
- void deref();
-
- OpcodeID opcodeID;
- union {
- struct {
- Structure* baseObjectStructure;
- } getByIdSelf;
- struct {
- Structure* baseObjectStructure;
- Structure* prototypeStructure;
- } getByIdProto;
- struct {
- Structure* baseObjectStructure;
- StructureChain* chain;
- } getByIdChain;
- struct {
- PolymorphicAccessStructureList* structureList;
- int listSize;
- } getByIdSelfList;
- struct {
- PolymorphicAccessStructureList* structureList;
- int listSize;
- } getByIdProtoList;
- struct {
- Structure* previousStructure;
- Structure* structure;
- StructureChain* chain;
- } putByIdTransition;
- struct {
- Structure* baseObjectStructure;
- } putByIdReplace;
- } u;
-
- void* stubRoutine;
- void* callReturnLocation;
- void* hotPathBegin;
- };
+ int8_t accessType;
+ bool seen : 1;
+ bool resetByGC : 1;
+
+ CodeOrigin codeOrigin;
+
+ struct {
+ unsigned spillMode : 8;
+ int8_t baseGPR;
+#if USE(JSVALUE32_64)
+ int8_t valueTagGPR;
+#endif
+ int8_t valueGPR;
+ RegisterSet usedRegisters;
+ int32_t deltaCallToDone;
+ int32_t deltaCallToStorageLoad;
+ int32_t deltaCallToJump;
+ int32_t deltaCallToSlowCase;
+ int32_t deltaCheckImmToCall;
+#if USE(JSVALUE64)
+ int32_t deltaCallToLoadOrStore;
+#else
+ int32_t deltaCallToTagLoadOrStore;
+ int32_t deltaCallToPayloadLoadOrStore;
#endif
+ } patch;
+
+ union {
+ struct {
+ // It would be unwise to put anything here, as it will surely be overwritten.
+ } unset;
+ struct {
+ WriteBarrierBase<Structure> baseObjectStructure;
+ } getByIdSelf;
+ struct {
+ WriteBarrierBase<Structure> baseObjectStructure;
+ WriteBarrierBase<Structure> prototypeStructure;
+ bool isDirect;
+ } getByIdProto;
+ struct {
+ WriteBarrierBase<Structure> baseObjectStructure;
+ WriteBarrierBase<StructureChain> chain;
+ unsigned count : 31;
+ bool isDirect : 1;
+ } getByIdChain;
+ struct {
+ PolymorphicGetByIdList* list;
+ } getByIdList;
+ struct {
+ WriteBarrierBase<Structure> previousStructure;
+ WriteBarrierBase<Structure> structure;
+ WriteBarrierBase<StructureChain> chain;
+ } putByIdTransition;
+ struct {
+ WriteBarrierBase<Structure> baseObjectStructure;
+ } putByIdReplace;
+ struct {
+ PolymorphicPutByIdList* list;
+ } putByIdList;
+ struct {
+ PolymorphicAccessStructureList* structureList;
+ int listSize;
+ } inList;
+ } u;
+
+ RefPtr<JITStubRoutine> stubRoutine;
+ CodeLocationCall callReturnLocation;
+ RefPtr<WatchpointsOnStructureStubInfo> watchpoints;
+};
+
+inline CodeOrigin getStructureStubInfoCodeOrigin(StructureStubInfo& structureStubInfo)
+{
+ return structureStubInfo.codeOrigin;
+}
+
+typedef HashMap<CodeOrigin, StructureStubInfo*, CodeOriginApproximateHash> StubInfoMap;
+
+#else
+
+typedef HashMap<int, void*> StubInfoMap;
+
+#endif // ENABLE(JIT)
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff