Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_IC_H_ |
| 6 | #define V8_IC_H_ |
| 7 | |
| 8 | #include "src/ic/ic-state.h" |
| 9 | #include "src/macro-assembler.h" |
| 10 | |
| 11 | namespace v8 { |
| 12 | namespace internal { |
| 13 | |
| 14 | |
| 15 | // IC_UTIL_LIST defines all utility functions called from generated |
| 16 | // inline caching code. The argument for the macro, ICU, is the function name. |
| 17 | #define IC_UTIL_LIST(ICU) \ |
| 18 | ICU(LoadIC_Miss) \ |
| 19 | ICU(KeyedLoadIC_Miss) \ |
| 20 | ICU(CallIC_Miss) \ |
| 21 | ICU(CallIC_Customization_Miss) \ |
| 22 | ICU(StoreIC_Miss) \ |
| 23 | ICU(StoreIC_Slow) \ |
| 24 | ICU(SharedStoreIC_ExtendStorage) \ |
| 25 | ICU(KeyedStoreIC_Miss) \ |
| 26 | ICU(KeyedStoreIC_Slow) \ |
| 27 | /* Utilities for IC stubs. */ \ |
| 28 | ICU(StoreCallbackProperty) \ |
| 29 | ICU(LoadPropertyWithInterceptorOnly) \ |
| 30 | ICU(LoadPropertyWithInterceptor) \ |
| 31 | ICU(LoadElementWithInterceptor) \ |
| 32 | ICU(StorePropertyWithInterceptor) \ |
| 33 | ICU(CompareIC_Miss) \ |
| 34 | ICU(BinaryOpIC_Miss) \ |
| 35 | ICU(CompareNilIC_Miss) \ |
| 36 | ICU(Unreachable) \ |
| 37 | ICU(ToBooleanIC_Miss) |
| 38 | // |
| 39 | // IC is the base class for LoadIC, StoreIC, KeyedLoadIC, and KeyedStoreIC. |
| 40 | // |
| 41 | class IC { |
| 42 | public: |
| 43 | // The ids for utility called from the generated code. |
| 44 | enum UtilityId { |
| 45 | #define CONST_NAME(name) k##name, |
| 46 | IC_UTIL_LIST(CONST_NAME) |
| 47 | #undef CONST_NAME |
| 48 | kUtilityCount |
| 49 | }; |
| 50 | |
| 51 | // Looks up the address of the named utility. |
| 52 | static Address AddressFromUtilityId(UtilityId id); |
| 53 | |
| 54 | // Alias the inline cache state type to make the IC code more readable. |
| 55 | typedef InlineCacheState State; |
| 56 | |
| 57 | // The IC code is either invoked with no extra frames on the stack |
| 58 | // or with a single extra frame for supporting calls. |
| 59 | enum FrameDepth { NO_EXTRA_FRAME = 0, EXTRA_CALL_FRAME = 1 }; |
| 60 | |
| 61 | // Construct the IC structure with the given number of extra |
| 62 | // JavaScript frames on the stack. |
| 63 | IC(FrameDepth depth, Isolate* isolate); |
| 64 | virtual ~IC() {} |
| 65 | |
| 66 | State state() const { return state_; } |
| 67 | inline Address address() const; |
| 68 | |
| 69 | // Compute the current IC state based on the target stub, receiver and name. |
| 70 | void UpdateState(Handle<Object> receiver, Handle<Object> name); |
| 71 | |
| 72 | bool IsNameCompatibleWithPrototypeFailure(Handle<Object> name); |
| 73 | void MarkPrototypeFailure(Handle<Object> name) { |
| 74 | DCHECK(IsNameCompatibleWithPrototypeFailure(name)); |
| 75 | state_ = PROTOTYPE_FAILURE; |
| 76 | } |
| 77 | |
| 78 | // If the stub contains weak maps then this function adds the stub to |
| 79 | // the dependent code array of each weak map. |
| 80 | static void RegisterWeakMapDependency(Handle<Code> stub); |
| 81 | |
| 82 | // This function is called when a weak map in the stub is dying, |
| 83 | // invalidates the stub by setting maps in it to undefined. |
| 84 | static void InvalidateMaps(Code* stub); |
| 85 | |
| 86 | // Clear the inline cache to initial state. |
| 87 | static void Clear(Isolate* isolate, Address address, |
| 88 | ConstantPoolArray* constant_pool); |
| 89 | |
| 90 | #ifdef DEBUG |
| 91 | bool IsLoadStub() const { |
| 92 | return target()->is_load_stub() || target()->is_keyed_load_stub(); |
| 93 | } |
| 94 | |
| 95 | bool IsStoreStub() const { |
| 96 | return target()->is_store_stub() || target()->is_keyed_store_stub(); |
| 97 | } |
| 98 | |
| 99 | bool IsCallStub() const { return target()->is_call_stub(); } |
| 100 | #endif |
| 101 | |
| 102 | template <class TypeClass> |
| 103 | static JSFunction* GetRootConstructor(TypeClass* type, |
| 104 | Context* native_context); |
| 105 | static inline Handle<Map> GetHandlerCacheHolder(HeapType* type, |
| 106 | bool receiver_is_holder, |
| 107 | Isolate* isolate, |
| 108 | CacheHolderFlag* flag); |
| 109 | static inline Handle<Map> GetICCacheHolder(HeapType* type, Isolate* isolate, |
| 110 | CacheHolderFlag* flag); |
| 111 | |
| 112 | static bool IsCleared(Code* code) { |
| 113 | InlineCacheState state = code->ic_state(); |
| 114 | return state == UNINITIALIZED || state == PREMONOMORPHIC; |
| 115 | } |
| 116 | |
| 117 | // Utility functions to convert maps to types and back. There are two special |
| 118 | // cases: |
| 119 | // - The heap_number_map is used as a marker which includes heap numbers as |
| 120 | // well as smis. |
| 121 | // - The oddball map is only used for booleans. |
| 122 | static Handle<Map> TypeToMap(HeapType* type, Isolate* isolate); |
| 123 | template <class T> |
| 124 | static typename T::TypeHandle MapToType(Handle<Map> map, |
| 125 | typename T::Region* region); |
| 126 | |
| 127 | static Handle<HeapType> CurrentTypeOf(Handle<Object> object, |
| 128 | Isolate* isolate); |
| 129 | |
| 130 | protected: |
| 131 | // Get the call-site target; used for determining the state. |
| 132 | Handle<Code> target() const { return target_; } |
| 133 | |
| 134 | Address fp() const { return fp_; } |
| 135 | Address pc() const { return *pc_address_; } |
| 136 | Isolate* isolate() const { return isolate_; } |
| 137 | |
| 138 | // Get the shared function info of the caller. |
| 139 | SharedFunctionInfo* GetSharedFunctionInfo() const; |
| 140 | // Get the code object of the caller. |
| 141 | Code* GetCode() const; |
| 142 | // Get the original (non-breakpointed) code object of the caller. |
| 143 | Code* GetOriginalCode() const; |
| 144 | |
| 145 | // Set the call-site target. |
| 146 | inline void set_target(Code* code); |
| 147 | bool is_target_set() { return target_set_; } |
| 148 | |
| 149 | char TransitionMarkFromState(IC::State state); |
| 150 | void TraceIC(const char* type, Handle<Object> name); |
| 151 | void TraceIC(const char* type, Handle<Object> name, State old_state, |
| 152 | State new_state); |
| 153 | |
| 154 | MaybeHandle<Object> TypeError(const char* type, Handle<Object> object, |
| 155 | Handle<Object> key); |
| 156 | MaybeHandle<Object> ReferenceError(const char* type, Handle<Name> name); |
| 157 | |
| 158 | // Access the target code for the given IC address. |
| 159 | static inline Code* GetTargetAtAddress(Address address, |
| 160 | ConstantPoolArray* constant_pool); |
| 161 | static inline void SetTargetAtAddress(Address address, Code* target, |
| 162 | ConstantPoolArray* constant_pool); |
| 163 | static void OnTypeFeedbackChanged(Isolate* isolate, Address address, |
| 164 | State old_state, State new_state, |
| 165 | bool target_remains_ic_stub); |
| 166 | static void PostPatching(Address address, Code* target, Code* old_target); |
| 167 | |
| 168 | // Compute the handler either by compiling or by retrieving a cached version. |
| 169 | Handle<Code> ComputeHandler(LookupIterator* lookup, |
| 170 | Handle<Object> value = Handle<Code>::null()); |
| 171 | virtual Handle<Code> CompileHandler(LookupIterator* lookup, |
| 172 | Handle<Object> value, |
| 173 | CacheHolderFlag cache_holder) { |
| 174 | UNREACHABLE(); |
| 175 | return Handle<Code>::null(); |
| 176 | } |
| 177 | |
| 178 | void UpdateMonomorphicIC(Handle<Code> handler, Handle<Name> name); |
| 179 | bool UpdatePolymorphicIC(Handle<Name> name, Handle<Code> code); |
| 180 | void UpdateMegamorphicCache(HeapType* type, Name* name, Code* code); |
| 181 | |
| 182 | void CopyICToMegamorphicCache(Handle<Name> name); |
| 183 | bool IsTransitionOfMonomorphicTarget(Map* source_map, Map* target_map); |
| 184 | void PatchCache(Handle<Name> name, Handle<Code> code); |
| 185 | Code::Kind kind() const { return kind_; } |
| 186 | Code::Kind handler_kind() const { |
| 187 | if (kind_ == Code::KEYED_LOAD_IC) return Code::LOAD_IC; |
| 188 | DCHECK(kind_ == Code::LOAD_IC || kind_ == Code::STORE_IC || |
| 189 | kind_ == Code::KEYED_STORE_IC); |
| 190 | return kind_; |
| 191 | } |
| 192 | virtual Handle<Code> megamorphic_stub() { |
| 193 | UNREACHABLE(); |
| 194 | return Handle<Code>::null(); |
| 195 | } |
| 196 | |
| 197 | bool TryRemoveInvalidPrototypeDependentStub(Handle<Object> receiver, |
| 198 | Handle<String> name); |
| 199 | |
| 200 | ExtraICState extra_ic_state() const { return extra_ic_state_; } |
| 201 | void set_extra_ic_state(ExtraICState state) { extra_ic_state_ = state; } |
| 202 | |
| 203 | Handle<HeapType> receiver_type() { return receiver_type_; } |
| 204 | void update_receiver_type(Handle<Object> receiver) { |
| 205 | receiver_type_ = CurrentTypeOf(receiver, isolate_); |
| 206 | } |
| 207 | |
| 208 | void TargetMaps(MapHandleList* list) { |
| 209 | FindTargetMaps(); |
| 210 | for (int i = 0; i < target_maps_.length(); i++) { |
| 211 | list->Add(target_maps_.at(i)); |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | void TargetTypes(TypeHandleList* list) { |
| 216 | FindTargetMaps(); |
| 217 | for (int i = 0; i < target_maps_.length(); i++) { |
| 218 | list->Add(MapToType<HeapType>(target_maps_.at(i), isolate_)); |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | Map* FirstTargetMap() { |
| 223 | FindTargetMaps(); |
| 224 | return target_maps_.length() > 0 ? *target_maps_.at(0) : NULL; |
| 225 | } |
| 226 | |
| 227 | protected: |
| 228 | inline void UpdateTarget(); |
| 229 | |
| 230 | private: |
| 231 | inline Code* raw_target() const; |
| 232 | inline ConstantPoolArray* constant_pool() const; |
| 233 | inline ConstantPoolArray* raw_constant_pool() const; |
| 234 | |
| 235 | void FindTargetMaps() { |
| 236 | if (target_maps_set_) return; |
| 237 | target_maps_set_ = true; |
| 238 | if (state_ == MONOMORPHIC) { |
| 239 | Map* map = target_->FindFirstMap(); |
| 240 | if (map != NULL) target_maps_.Add(handle(map)); |
| 241 | } else if (state_ != UNINITIALIZED && state_ != PREMONOMORPHIC) { |
| 242 | target_->FindAllMaps(&target_maps_); |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | // Frame pointer for the frame that uses (calls) the IC. |
| 247 | Address fp_; |
| 248 | |
| 249 | // All access to the program counter of an IC structure is indirect |
| 250 | // to make the code GC safe. This feature is crucial since |
| 251 | // GetProperty and SetProperty are called and they in turn might |
| 252 | // invoke the garbage collector. |
| 253 | Address* pc_address_; |
| 254 | |
| 255 | Isolate* isolate_; |
| 256 | |
| 257 | // The constant pool of the code which originally called the IC (which might |
| 258 | // be for the breakpointed copy of the original code). |
| 259 | Handle<ConstantPoolArray> raw_constant_pool_; |
| 260 | |
| 261 | // The original code target that missed. |
| 262 | Handle<Code> target_; |
| 263 | bool target_set_; |
| 264 | State state_; |
| 265 | Code::Kind kind_; |
| 266 | Handle<HeapType> receiver_type_; |
| 267 | MaybeHandle<Code> maybe_handler_; |
| 268 | |
| 269 | ExtraICState extra_ic_state_; |
| 270 | MapHandleList target_maps_; |
| 271 | bool target_maps_set_; |
| 272 | |
| 273 | DISALLOW_IMPLICIT_CONSTRUCTORS(IC); |
| 274 | }; |
| 275 | |
| 276 | |
| 277 | // An IC_Utility encapsulates IC::UtilityId. It exists mainly because you |
| 278 | // cannot make forward declarations to an enum. |
| 279 | class IC_Utility { |
| 280 | public: |
| 281 | explicit IC_Utility(IC::UtilityId id) |
| 282 | : address_(IC::AddressFromUtilityId(id)), id_(id) {} |
| 283 | |
| 284 | Address address() const { return address_; } |
| 285 | |
| 286 | IC::UtilityId id() const { return id_; } |
| 287 | |
| 288 | private: |
| 289 | Address address_; |
| 290 | IC::UtilityId id_; |
| 291 | }; |
| 292 | |
| 293 | |
| 294 | class CallIC : public IC { |
| 295 | public: |
| 296 | explicit CallIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {} |
| 297 | |
| 298 | void PatchMegamorphic(Handle<Object> function, |
| 299 | Handle<TypeFeedbackVector> vector, Handle<Smi> slot); |
| 300 | |
| 301 | void HandleMiss(Handle<Object> receiver, Handle<Object> function, |
| 302 | Handle<TypeFeedbackVector> vector, Handle<Smi> slot); |
| 303 | |
| 304 | // Returns true if a custom handler was installed. |
| 305 | bool DoCustomHandler(Handle<Object> receiver, Handle<Object> function, |
| 306 | Handle<TypeFeedbackVector> vector, Handle<Smi> slot, |
| 307 | const CallICState& state); |
| 308 | |
| 309 | // Code generator routines. |
| 310 | static Handle<Code> initialize_stub(Isolate* isolate, int argc, |
| 311 | CallICState::CallType call_type); |
| 312 | |
| 313 | static void Clear(Isolate* isolate, Address address, Code* target, |
| 314 | ConstantPoolArray* constant_pool); |
| 315 | |
| 316 | private: |
| 317 | inline IC::State FeedbackToState(Handle<TypeFeedbackVector> vector, |
| 318 | Handle<Smi> slot) const; |
| 319 | }; |
| 320 | |
| 321 | |
| 322 | class LoadIC : public IC { |
| 323 | public: |
| 324 | static ExtraICState ComputeExtraICState(ContextualMode contextual_mode) { |
| 325 | return LoadICState(contextual_mode).GetExtraICState(); |
| 326 | } |
| 327 | |
| 328 | ContextualMode contextual_mode() const { |
| 329 | return LoadICState::GetContextualMode(extra_ic_state()); |
| 330 | } |
| 331 | |
| 332 | explicit LoadIC(FrameDepth depth, Isolate* isolate) : IC(depth, isolate) { |
| 333 | DCHECK(IsLoadStub()); |
| 334 | } |
| 335 | |
| 336 | // Returns if this IC is for contextual (no explicit receiver) |
| 337 | // access to properties. |
| 338 | bool IsUndeclaredGlobal(Handle<Object> receiver) { |
| 339 | if (receiver->IsGlobalObject()) { |
| 340 | return contextual_mode() == CONTEXTUAL; |
| 341 | } else { |
| 342 | DCHECK(contextual_mode() != CONTEXTUAL); |
| 343 | return false; |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | // Code generator routines. |
| 348 | static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); } |
| 349 | static void GeneratePreMonomorphic(MacroAssembler* masm) { |
| 350 | GenerateMiss(masm); |
| 351 | } |
| 352 | static void GenerateMiss(MacroAssembler* masm); |
| 353 | static void GenerateNormal(MacroAssembler* masm); |
| 354 | static void GenerateRuntimeGetProperty(MacroAssembler* masm); |
| 355 | |
| 356 | static Handle<Code> initialize_stub(Isolate* isolate, |
| 357 | ExtraICState extra_state); |
| 358 | |
| 359 | MUST_USE_RESULT MaybeHandle<Object> Load(Handle<Object> object, |
| 360 | Handle<Name> name); |
| 361 | |
| 362 | protected: |
| 363 | inline void set_target(Code* code); |
| 364 | |
| 365 | Handle<Code> slow_stub() const { |
| 366 | if (kind() == Code::LOAD_IC) { |
| 367 | return isolate()->builtins()->LoadIC_Slow(); |
| 368 | } else { |
| 369 | DCHECK_EQ(Code::KEYED_LOAD_IC, kind()); |
| 370 | return isolate()->builtins()->KeyedLoadIC_Slow(); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | virtual Handle<Code> megamorphic_stub() OVERRIDE; |
| 375 | |
| 376 | // Update the inline cache and the global stub cache based on the |
| 377 | // lookup result. |
| 378 | void UpdateCaches(LookupIterator* lookup); |
| 379 | |
| 380 | virtual Handle<Code> CompileHandler(LookupIterator* lookup, |
| 381 | Handle<Object> unused, |
| 382 | CacheHolderFlag cache_holder); |
| 383 | |
| 384 | private: |
| 385 | virtual Handle<Code> pre_monomorphic_stub() const; |
| 386 | static Handle<Code> pre_monomorphic_stub(Isolate* isolate, |
| 387 | ExtraICState extra_state); |
| 388 | |
| 389 | Handle<Code> SimpleFieldLoad(FieldIndex index); |
| 390 | |
| 391 | static void Clear(Isolate* isolate, Address address, Code* target, |
| 392 | ConstantPoolArray* constant_pool); |
| 393 | |
| 394 | friend class IC; |
| 395 | }; |
| 396 | |
| 397 | |
| 398 | class KeyedLoadIC : public LoadIC { |
| 399 | public: |
| 400 | explicit KeyedLoadIC(FrameDepth depth, Isolate* isolate) |
| 401 | : LoadIC(depth, isolate) { |
| 402 | DCHECK(target()->is_keyed_load_stub()); |
| 403 | } |
| 404 | |
| 405 | MUST_USE_RESULT MaybeHandle<Object> Load(Handle<Object> object, |
| 406 | Handle<Object> key); |
| 407 | |
| 408 | // Code generator routines. |
| 409 | static void GenerateMiss(MacroAssembler* masm); |
| 410 | static void GenerateRuntimeGetProperty(MacroAssembler* masm); |
| 411 | static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); } |
| 412 | static void GeneratePreMonomorphic(MacroAssembler* masm) { |
| 413 | GenerateMiss(masm); |
| 414 | } |
| 415 | static void GenerateGeneric(MacroAssembler* masm); |
| 416 | static void GenerateString(MacroAssembler* masm); |
| 417 | |
| 418 | // Bit mask to be tested against bit field for the cases when |
| 419 | // generic stub should go into slow case. |
| 420 | // Access check is necessary explicitly since generic stub does not perform |
| 421 | // map checks. |
| 422 | static const int kSlowCaseBitFieldMask = |
| 423 | (1 << Map::kIsAccessCheckNeeded) | (1 << Map::kHasIndexedInterceptor); |
| 424 | |
| 425 | static Handle<Code> generic_stub(Isolate* isolate); |
| 426 | static Handle<Code> pre_monomorphic_stub(Isolate* isolate); |
| 427 | |
| 428 | protected: |
| 429 | Handle<Code> LoadElementStub(Handle<JSObject> receiver); |
| 430 | virtual Handle<Code> pre_monomorphic_stub() const { |
| 431 | return pre_monomorphic_stub(isolate()); |
| 432 | } |
| 433 | |
| 434 | private: |
| 435 | Handle<Code> generic_stub() const { return generic_stub(isolate()); } |
| 436 | Handle<Code> string_stub() { |
| 437 | return isolate()->builtins()->KeyedLoadIC_String(); |
| 438 | } |
| 439 | |
| 440 | static void Clear(Isolate* isolate, Address address, Code* target, |
| 441 | ConstantPoolArray* constant_pool); |
| 442 | |
| 443 | friend class IC; |
| 444 | }; |
| 445 | |
| 446 | |
| 447 | class StoreIC : public IC { |
| 448 | public: |
| 449 | class StrictModeState : public BitField<StrictMode, 1, 1> {}; |
| 450 | static ExtraICState ComputeExtraICState(StrictMode flag) { |
| 451 | return StrictModeState::encode(flag); |
| 452 | } |
| 453 | static StrictMode GetStrictMode(ExtraICState state) { |
| 454 | return StrictModeState::decode(state); |
| 455 | } |
| 456 | |
| 457 | // For convenience, a statically declared encoding of strict mode extra |
| 458 | // IC state. |
| 459 | static const ExtraICState kStrictModeState = 1 << StrictModeState::kShift; |
| 460 | |
| 461 | StoreIC(FrameDepth depth, Isolate* isolate) : IC(depth, isolate) { |
| 462 | DCHECK(IsStoreStub()); |
| 463 | } |
| 464 | |
| 465 | StrictMode strict_mode() const { |
| 466 | return StrictModeState::decode(extra_ic_state()); |
| 467 | } |
| 468 | |
| 469 | // Code generators for stub routines. Only called once at startup. |
| 470 | static void GenerateSlow(MacroAssembler* masm); |
| 471 | static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); } |
| 472 | static void GeneratePreMonomorphic(MacroAssembler* masm) { |
| 473 | GenerateMiss(masm); |
| 474 | } |
| 475 | static void GenerateMiss(MacroAssembler* masm); |
| 476 | static void GenerateMegamorphic(MacroAssembler* masm); |
| 477 | static void GenerateNormal(MacroAssembler* masm); |
| 478 | static void GenerateRuntimeSetProperty(MacroAssembler* masm, |
| 479 | StrictMode strict_mode); |
| 480 | |
| 481 | static Handle<Code> initialize_stub(Isolate* isolate, StrictMode strict_mode); |
| 482 | |
| 483 | MUST_USE_RESULT MaybeHandle<Object> Store( |
| 484 | Handle<Object> object, Handle<Name> name, Handle<Object> value, |
| 485 | JSReceiver::StoreFromKeyed store_mode = |
| 486 | JSReceiver::CERTAINLY_NOT_STORE_FROM_KEYED); |
| 487 | |
| 488 | bool LookupForWrite(LookupIterator* it, Handle<Object> value, |
| 489 | JSReceiver::StoreFromKeyed store_mode); |
| 490 | |
| 491 | protected: |
| 492 | virtual Handle<Code> megamorphic_stub() OVERRIDE; |
| 493 | |
| 494 | // Stub accessors. |
| 495 | Handle<Code> generic_stub() const; |
| 496 | |
| 497 | Handle<Code> slow_stub() const; |
| 498 | |
| 499 | virtual Handle<Code> pre_monomorphic_stub() const { |
| 500 | return pre_monomorphic_stub(isolate(), strict_mode()); |
| 501 | } |
| 502 | |
| 503 | static Handle<Code> pre_monomorphic_stub(Isolate* isolate, |
| 504 | StrictMode strict_mode); |
| 505 | |
| 506 | // Update the inline cache and the global stub cache based on the |
| 507 | // lookup result. |
| 508 | void UpdateCaches(LookupIterator* lookup, Handle<Object> value, |
| 509 | JSReceiver::StoreFromKeyed store_mode); |
| 510 | virtual Handle<Code> CompileHandler(LookupIterator* lookup, |
| 511 | Handle<Object> value, |
| 512 | CacheHolderFlag cache_holder); |
| 513 | |
| 514 | private: |
| 515 | inline void set_target(Code* code); |
| 516 | |
| 517 | static void Clear(Isolate* isolate, Address address, Code* target, |
| 518 | ConstantPoolArray* constant_pool); |
| 519 | |
| 520 | friend class IC; |
| 521 | }; |
| 522 | |
| 523 | |
| 524 | enum KeyedStoreCheckMap { kDontCheckMap, kCheckMap }; |
| 525 | |
| 526 | |
| 527 | enum KeyedStoreIncrementLength { kDontIncrementLength, kIncrementLength }; |
| 528 | |
| 529 | |
| 530 | class KeyedStoreIC : public StoreIC { |
| 531 | public: |
| 532 | // ExtraICState bits (building on IC) |
| 533 | // ExtraICState bits |
| 534 | class ExtraICStateKeyedAccessStoreMode |
| 535 | : public BitField<KeyedAccessStoreMode, 2, 4> {}; // NOLINT |
| 536 | |
| 537 | static ExtraICState ComputeExtraICState(StrictMode flag, |
| 538 | KeyedAccessStoreMode mode) { |
| 539 | return StrictModeState::encode(flag) | |
| 540 | ExtraICStateKeyedAccessStoreMode::encode(mode); |
| 541 | } |
| 542 | |
| 543 | static KeyedAccessStoreMode GetKeyedAccessStoreMode( |
| 544 | ExtraICState extra_state) { |
| 545 | return ExtraICStateKeyedAccessStoreMode::decode(extra_state); |
| 546 | } |
| 547 | |
| 548 | KeyedStoreIC(FrameDepth depth, Isolate* isolate) : StoreIC(depth, isolate) { |
| 549 | DCHECK(target()->is_keyed_store_stub()); |
| 550 | } |
| 551 | |
| 552 | MUST_USE_RESULT MaybeHandle<Object> Store(Handle<Object> object, |
| 553 | Handle<Object> name, |
| 554 | Handle<Object> value); |
| 555 | |
| 556 | // Code generators for stub routines. Only called once at startup. |
| 557 | static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); } |
| 558 | static void GeneratePreMonomorphic(MacroAssembler* masm) { |
| 559 | GenerateMiss(masm); |
| 560 | } |
| 561 | static void GenerateMiss(MacroAssembler* masm); |
| 562 | static void GenerateSlow(MacroAssembler* masm); |
| 563 | static void GenerateGeneric(MacroAssembler* masm, StrictMode strict_mode); |
| 564 | static void GenerateSloppyArguments(MacroAssembler* masm); |
| 565 | |
| 566 | protected: |
| 567 | virtual Handle<Code> pre_monomorphic_stub() const { |
| 568 | return pre_monomorphic_stub(isolate(), strict_mode()); |
| 569 | } |
| 570 | static Handle<Code> pre_monomorphic_stub(Isolate* isolate, |
| 571 | StrictMode strict_mode) { |
| 572 | if (strict_mode == STRICT) { |
| 573 | return isolate->builtins()->KeyedStoreIC_PreMonomorphic_Strict(); |
| 574 | } else { |
| 575 | return isolate->builtins()->KeyedStoreIC_PreMonomorphic(); |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | Handle<Code> StoreElementStub(Handle<JSObject> receiver, |
| 580 | KeyedAccessStoreMode store_mode); |
| 581 | |
| 582 | private: |
| 583 | inline void set_target(Code* code); |
| 584 | |
| 585 | // Stub accessors. |
| 586 | Handle<Code> sloppy_arguments_stub() { |
| 587 | return isolate()->builtins()->KeyedStoreIC_SloppyArguments(); |
| 588 | } |
| 589 | |
| 590 | static void Clear(Isolate* isolate, Address address, Code* target, |
| 591 | ConstantPoolArray* constant_pool); |
| 592 | |
| 593 | KeyedAccessStoreMode GetStoreMode(Handle<JSObject> receiver, |
| 594 | Handle<Object> key, Handle<Object> value); |
| 595 | |
| 596 | Handle<Map> ComputeTransitionedMap(Handle<Map> map, |
| 597 | KeyedAccessStoreMode store_mode); |
| 598 | |
| 599 | friend class IC; |
| 600 | }; |
| 601 | |
| 602 | |
| 603 | // Type Recording BinaryOpIC, that records the types of the inputs and outputs. |
| 604 | class BinaryOpIC : public IC { |
| 605 | public: |
| 606 | explicit BinaryOpIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {} |
| 607 | |
| 608 | static Builtins::JavaScript TokenToJSBuiltin(Token::Value op); |
| 609 | |
| 610 | MaybeHandle<Object> Transition(Handle<AllocationSite> allocation_site, |
| 611 | Handle<Object> left, |
| 612 | Handle<Object> right) WARN_UNUSED_RESULT; |
| 613 | }; |
| 614 | |
| 615 | |
| 616 | class CompareIC : public IC { |
| 617 | public: |
| 618 | CompareIC(Isolate* isolate, Token::Value op) |
| 619 | : IC(EXTRA_CALL_FRAME, isolate), op_(op) {} |
| 620 | |
| 621 | // Update the inline cache for the given operands. |
| 622 | Code* UpdateCaches(Handle<Object> x, Handle<Object> y); |
| 623 | |
| 624 | // Helper function for computing the condition for a compare operation. |
| 625 | static Condition ComputeCondition(Token::Value op); |
| 626 | |
| 627 | // Factory method for getting an uninitialized compare stub. |
| 628 | static Handle<Code> GetUninitialized(Isolate* isolate, Token::Value op); |
| 629 | |
| 630 | private: |
| 631 | static bool HasInlinedSmiCode(Address address); |
| 632 | |
| 633 | bool strict() const { return op_ == Token::EQ_STRICT; } |
| 634 | Condition GetCondition() const { return ComputeCondition(op_); } |
| 635 | |
| 636 | static Code* GetRawUninitialized(Isolate* isolate, Token::Value op); |
| 637 | |
| 638 | static void Clear(Isolate* isolate, Address address, Code* target, |
| 639 | ConstantPoolArray* constant_pool); |
| 640 | |
| 641 | Token::Value op_; |
| 642 | |
| 643 | friend class IC; |
| 644 | }; |
| 645 | |
| 646 | |
| 647 | class CompareNilIC : public IC { |
| 648 | public: |
| 649 | explicit CompareNilIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {} |
| 650 | |
| 651 | Handle<Object> CompareNil(Handle<Object> object); |
| 652 | |
| 653 | static Handle<Code> GetUninitialized(); |
| 654 | |
| 655 | static void Clear(Address address, Code* target, |
| 656 | ConstantPoolArray* constant_pool); |
| 657 | |
| 658 | static Handle<Object> DoCompareNilSlow(Isolate* isolate, NilValue nil, |
| 659 | Handle<Object> object); |
| 660 | }; |
| 661 | |
| 662 | |
| 663 | class ToBooleanIC : public IC { |
| 664 | public: |
| 665 | explicit ToBooleanIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {} |
| 666 | |
| 667 | Handle<Object> ToBoolean(Handle<Object> object); |
| 668 | }; |
| 669 | |
| 670 | |
| 671 | // Helper for BinaryOpIC and CompareIC. |
| 672 | enum InlinedSmiCheck { ENABLE_INLINED_SMI_CHECK, DISABLE_INLINED_SMI_CHECK }; |
| 673 | void PatchInlinedSmiCode(Address address, InlinedSmiCheck check); |
| 674 | |
| 675 | DECLARE_RUNTIME_FUNCTION(KeyedLoadIC_MissFromStubFailure); |
| 676 | DECLARE_RUNTIME_FUNCTION(KeyedStoreIC_MissFromStubFailure); |
| 677 | DECLARE_RUNTIME_FUNCTION(UnaryOpIC_Miss); |
| 678 | DECLARE_RUNTIME_FUNCTION(StoreIC_MissFromStubFailure); |
| 679 | DECLARE_RUNTIME_FUNCTION(ElementsTransitionAndStoreIC_Miss); |
| 680 | DECLARE_RUNTIME_FUNCTION(BinaryOpIC_Miss); |
| 681 | DECLARE_RUNTIME_FUNCTION(BinaryOpIC_MissWithAllocationSite); |
| 682 | DECLARE_RUNTIME_FUNCTION(CompareNilIC_Miss); |
| 683 | DECLARE_RUNTIME_FUNCTION(ToBooleanIC_Miss); |
| 684 | DECLARE_RUNTIME_FUNCTION(VectorLoadIC_MissFromStubFailure); |
| 685 | DECLARE_RUNTIME_FUNCTION(VectorKeyedLoadIC_MissFromStubFailure); |
| 686 | |
| 687 | // Support functions for callbacks handlers. |
| 688 | DECLARE_RUNTIME_FUNCTION(StoreCallbackProperty); |
| 689 | |
| 690 | // Support functions for interceptor handlers. |
| 691 | DECLARE_RUNTIME_FUNCTION(LoadPropertyWithInterceptorOnly); |
| 692 | DECLARE_RUNTIME_FUNCTION(LoadPropertyWithInterceptor); |
| 693 | DECLARE_RUNTIME_FUNCTION(LoadElementWithInterceptor); |
| 694 | DECLARE_RUNTIME_FUNCTION(StorePropertyWithInterceptor); |
| 695 | } |
| 696 | } // namespace v8::internal |
| 697 | |
| 698 | #endif // V8_IC_H_ |