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) \ |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 24 | ICU(KeyedStoreIC_Miss) \ |
| 25 | ICU(KeyedStoreIC_Slow) \ |
| 26 | /* Utilities for IC stubs. */ \ |
| 27 | ICU(StoreCallbackProperty) \ |
| 28 | ICU(LoadPropertyWithInterceptorOnly) \ |
| 29 | ICU(LoadPropertyWithInterceptor) \ |
| 30 | ICU(LoadElementWithInterceptor) \ |
| 31 | ICU(StorePropertyWithInterceptor) \ |
| 32 | ICU(CompareIC_Miss) \ |
| 33 | ICU(BinaryOpIC_Miss) \ |
| 34 | ICU(CompareNilIC_Miss) \ |
| 35 | ICU(Unreachable) \ |
| 36 | ICU(ToBooleanIC_Miss) |
| 37 | // |
| 38 | // IC is the base class for LoadIC, StoreIC, KeyedLoadIC, and KeyedStoreIC. |
| 39 | // |
| 40 | class IC { |
| 41 | public: |
| 42 | // The ids for utility called from the generated code. |
| 43 | enum UtilityId { |
| 44 | #define CONST_NAME(name) k##name, |
| 45 | IC_UTIL_LIST(CONST_NAME) |
| 46 | #undef CONST_NAME |
| 47 | kUtilityCount |
| 48 | }; |
| 49 | |
| 50 | // Looks up the address of the named utility. |
| 51 | static Address AddressFromUtilityId(UtilityId id); |
| 52 | |
| 53 | // Alias the inline cache state type to make the IC code more readable. |
| 54 | typedef InlineCacheState State; |
| 55 | |
| 56 | // The IC code is either invoked with no extra frames on the stack |
| 57 | // or with a single extra frame for supporting calls. |
| 58 | enum FrameDepth { NO_EXTRA_FRAME = 0, EXTRA_CALL_FRAME = 1 }; |
| 59 | |
| 60 | // Construct the IC structure with the given number of extra |
| 61 | // JavaScript frames on the stack. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 62 | IC(FrameDepth depth, Isolate* isolate, FeedbackNexus* nexus = NULL, |
| 63 | bool for_queries_only = false); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 75 | old_state_ = state_; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 76 | state_ = PROTOTYPE_FAILURE; |
| 77 | } |
| 78 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 79 | // Clear the inline cache to initial state. |
| 80 | static void Clear(Isolate* isolate, Address address, |
| 81 | ConstantPoolArray* constant_pool); |
| 82 | |
| 83 | #ifdef DEBUG |
| 84 | bool IsLoadStub() const { |
| 85 | return target()->is_load_stub() || target()->is_keyed_load_stub(); |
| 86 | } |
| 87 | |
| 88 | bool IsStoreStub() const { |
| 89 | return target()->is_store_stub() || target()->is_keyed_store_stub(); |
| 90 | } |
| 91 | |
| 92 | bool IsCallStub() const { return target()->is_call_stub(); } |
| 93 | #endif |
| 94 | |
| 95 | template <class TypeClass> |
| 96 | static JSFunction* GetRootConstructor(TypeClass* type, |
| 97 | Context* native_context); |
| 98 | static inline Handle<Map> GetHandlerCacheHolder(HeapType* type, |
| 99 | bool receiver_is_holder, |
| 100 | Isolate* isolate, |
| 101 | CacheHolderFlag* flag); |
| 102 | static inline Handle<Map> GetICCacheHolder(HeapType* type, Isolate* isolate, |
| 103 | CacheHolderFlag* flag); |
| 104 | |
| 105 | static bool IsCleared(Code* code) { |
| 106 | InlineCacheState state = code->ic_state(); |
| 107 | return state == UNINITIALIZED || state == PREMONOMORPHIC; |
| 108 | } |
| 109 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 110 | static bool IsCleared(FeedbackNexus* nexus) { |
| 111 | InlineCacheState state = nexus->StateFromFeedback(); |
| 112 | return state == UNINITIALIZED || state == PREMONOMORPHIC; |
| 113 | } |
| 114 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 115 | // Utility functions to convert maps to types and back. There are two special |
| 116 | // cases: |
| 117 | // - The heap_number_map is used as a marker which includes heap numbers as |
| 118 | // well as smis. |
| 119 | // - The oddball map is only used for booleans. |
| 120 | static Handle<Map> TypeToMap(HeapType* type, Isolate* isolate); |
| 121 | template <class T> |
| 122 | static typename T::TypeHandle MapToType(Handle<Map> map, |
| 123 | typename T::Region* region); |
| 124 | |
| 125 | static Handle<HeapType> CurrentTypeOf(Handle<Object> object, |
| 126 | Isolate* isolate); |
| 127 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 128 | static bool ICUseVector(Code::Kind kind) { |
| 129 | return (FLAG_vector_ics && |
| 130 | (kind == Code::LOAD_IC || kind == Code::KEYED_LOAD_IC)) || |
| 131 | kind == Code::CALL_IC; |
| 132 | } |
| 133 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 134 | protected: |
| 135 | // Get the call-site target; used for determining the state. |
| 136 | Handle<Code> target() const { return target_; } |
| 137 | |
| 138 | Address fp() const { return fp_; } |
| 139 | Address pc() const { return *pc_address_; } |
| 140 | Isolate* isolate() const { return isolate_; } |
| 141 | |
| 142 | // Get the shared function info of the caller. |
| 143 | SharedFunctionInfo* GetSharedFunctionInfo() const; |
| 144 | // Get the code object of the caller. |
| 145 | Code* GetCode() const; |
| 146 | // Get the original (non-breakpointed) code object of the caller. |
| 147 | Code* GetOriginalCode() const; |
| 148 | |
| 149 | // Set the call-site target. |
| 150 | inline void set_target(Code* code); |
| 151 | bool is_target_set() { return target_set_; } |
| 152 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 153 | bool UseVector() const { |
| 154 | bool use = ICUseVector(kind()); |
| 155 | // If we are supposed to use the nexus, verify the nexus is non-null. |
| 156 | DCHECK(!use || nexus_ != NULL); |
| 157 | return use; |
| 158 | } |
| 159 | |
| 160 | // Configure for most states. |
| 161 | void ConfigureVectorState(IC::State new_state); |
| 162 | // Configure the vector for MONOMORPHIC. |
| 163 | void ConfigureVectorState(Handle<Name> name, Handle<HeapType> type, |
| 164 | Handle<Code> handler); |
| 165 | // Configure the vector for POLYMORPHIC. |
| 166 | void ConfigureVectorState(Handle<Name> name, TypeHandleList* types, |
| 167 | CodeHandleList* handlers); |
| 168 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 169 | char TransitionMarkFromState(IC::State state); |
| 170 | void TraceIC(const char* type, Handle<Object> name); |
| 171 | void TraceIC(const char* type, Handle<Object> name, State old_state, |
| 172 | State new_state); |
| 173 | |
| 174 | MaybeHandle<Object> TypeError(const char* type, Handle<Object> object, |
| 175 | Handle<Object> key); |
| 176 | MaybeHandle<Object> ReferenceError(const char* type, Handle<Name> name); |
| 177 | |
| 178 | // Access the target code for the given IC address. |
| 179 | static inline Code* GetTargetAtAddress(Address address, |
| 180 | ConstantPoolArray* constant_pool); |
| 181 | static inline void SetTargetAtAddress(Address address, Code* target, |
| 182 | ConstantPoolArray* constant_pool); |
| 183 | static void OnTypeFeedbackChanged(Isolate* isolate, Address address, |
| 184 | State old_state, State new_state, |
| 185 | bool target_remains_ic_stub); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 186 | // As a vector-based IC, type feedback must be updated differently. |
| 187 | static void OnTypeFeedbackChanged(Isolate* isolate, Code* host, |
| 188 | TypeFeedbackVector* vector, State old_state, |
| 189 | State new_state); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 190 | static void PostPatching(Address address, Code* target, Code* old_target); |
| 191 | |
| 192 | // Compute the handler either by compiling or by retrieving a cached version. |
| 193 | Handle<Code> ComputeHandler(LookupIterator* lookup, |
| 194 | Handle<Object> value = Handle<Code>::null()); |
| 195 | virtual Handle<Code> CompileHandler(LookupIterator* lookup, |
| 196 | Handle<Object> value, |
| 197 | CacheHolderFlag cache_holder) { |
| 198 | UNREACHABLE(); |
| 199 | return Handle<Code>::null(); |
| 200 | } |
| 201 | |
| 202 | void UpdateMonomorphicIC(Handle<Code> handler, Handle<Name> name); |
| 203 | bool UpdatePolymorphicIC(Handle<Name> name, Handle<Code> code); |
| 204 | void UpdateMegamorphicCache(HeapType* type, Name* name, Code* code); |
| 205 | |
| 206 | void CopyICToMegamorphicCache(Handle<Name> name); |
| 207 | bool IsTransitionOfMonomorphicTarget(Map* source_map, Map* target_map); |
| 208 | void PatchCache(Handle<Name> name, Handle<Code> code); |
| 209 | Code::Kind kind() const { return kind_; } |
| 210 | Code::Kind handler_kind() const { |
| 211 | if (kind_ == Code::KEYED_LOAD_IC) return Code::LOAD_IC; |
| 212 | DCHECK(kind_ == Code::LOAD_IC || kind_ == Code::STORE_IC || |
| 213 | kind_ == Code::KEYED_STORE_IC); |
| 214 | return kind_; |
| 215 | } |
| 216 | virtual Handle<Code> megamorphic_stub() { |
| 217 | UNREACHABLE(); |
| 218 | return Handle<Code>::null(); |
| 219 | } |
| 220 | |
| 221 | bool TryRemoveInvalidPrototypeDependentStub(Handle<Object> receiver, |
| 222 | Handle<String> name); |
| 223 | |
| 224 | ExtraICState extra_ic_state() const { return extra_ic_state_; } |
| 225 | void set_extra_ic_state(ExtraICState state) { extra_ic_state_ = state; } |
| 226 | |
| 227 | Handle<HeapType> receiver_type() { return receiver_type_; } |
| 228 | void update_receiver_type(Handle<Object> receiver) { |
| 229 | receiver_type_ = CurrentTypeOf(receiver, isolate_); |
| 230 | } |
| 231 | |
| 232 | void TargetMaps(MapHandleList* list) { |
| 233 | FindTargetMaps(); |
| 234 | for (int i = 0; i < target_maps_.length(); i++) { |
| 235 | list->Add(target_maps_.at(i)); |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | void TargetTypes(TypeHandleList* list) { |
| 240 | FindTargetMaps(); |
| 241 | for (int i = 0; i < target_maps_.length(); i++) { |
| 242 | list->Add(MapToType<HeapType>(target_maps_.at(i), isolate_)); |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | Map* FirstTargetMap() { |
| 247 | FindTargetMaps(); |
| 248 | return target_maps_.length() > 0 ? *target_maps_.at(0) : NULL; |
| 249 | } |
| 250 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 251 | inline void UpdateTarget(); |
| 252 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 253 | Handle<TypeFeedbackVector> vector() const { return nexus()->vector_handle(); } |
| 254 | FeedbackVectorICSlot slot() const { return nexus()->slot(); } |
| 255 | State saved_state() const { |
| 256 | return state() == PROTOTYPE_FAILURE ? old_state_ : state(); |
| 257 | } |
| 258 | |
| 259 | template <class NexusClass> |
| 260 | NexusClass* casted_nexus() { |
| 261 | return static_cast<NexusClass*>(nexus_); |
| 262 | } |
| 263 | FeedbackNexus* nexus() const { return nexus_; } |
| 264 | |
| 265 | inline Code* get_host(); |
| 266 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 267 | private: |
| 268 | inline Code* raw_target() const; |
| 269 | inline ConstantPoolArray* constant_pool() const; |
| 270 | inline ConstantPoolArray* raw_constant_pool() const; |
| 271 | |
| 272 | void FindTargetMaps() { |
| 273 | if (target_maps_set_) return; |
| 274 | target_maps_set_ = true; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 275 | if (UseVector()) { |
| 276 | nexus()->ExtractMaps(&target_maps_); |
| 277 | } else { |
| 278 | if (state_ == MONOMORPHIC) { |
| 279 | Map* map = target_->FindFirstMap(); |
| 280 | if (map != NULL) target_maps_.Add(handle(map)); |
| 281 | } else if (state_ != UNINITIALIZED && state_ != PREMONOMORPHIC) { |
| 282 | target_->FindAllMaps(&target_maps_); |
| 283 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 284 | } |
| 285 | } |
| 286 | |
| 287 | // Frame pointer for the frame that uses (calls) the IC. |
| 288 | Address fp_; |
| 289 | |
| 290 | // All access to the program counter of an IC structure is indirect |
| 291 | // to make the code GC safe. This feature is crucial since |
| 292 | // GetProperty and SetProperty are called and they in turn might |
| 293 | // invoke the garbage collector. |
| 294 | Address* pc_address_; |
| 295 | |
| 296 | Isolate* isolate_; |
| 297 | |
| 298 | // The constant pool of the code which originally called the IC (which might |
| 299 | // be for the breakpointed copy of the original code). |
| 300 | Handle<ConstantPoolArray> raw_constant_pool_; |
| 301 | |
| 302 | // The original code target that missed. |
| 303 | Handle<Code> target_; |
| 304 | bool target_set_; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 305 | State old_state_; // For saving if we marked as prototype failure. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 306 | State state_; |
| 307 | Code::Kind kind_; |
| 308 | Handle<HeapType> receiver_type_; |
| 309 | MaybeHandle<Code> maybe_handler_; |
| 310 | |
| 311 | ExtraICState extra_ic_state_; |
| 312 | MapHandleList target_maps_; |
| 313 | bool target_maps_set_; |
| 314 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 315 | FeedbackNexus* nexus_; |
| 316 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 317 | DISALLOW_IMPLICIT_CONSTRUCTORS(IC); |
| 318 | }; |
| 319 | |
| 320 | |
| 321 | // An IC_Utility encapsulates IC::UtilityId. It exists mainly because you |
| 322 | // cannot make forward declarations to an enum. |
| 323 | class IC_Utility { |
| 324 | public: |
| 325 | explicit IC_Utility(IC::UtilityId id) |
| 326 | : address_(IC::AddressFromUtilityId(id)), id_(id) {} |
| 327 | |
| 328 | Address address() const { return address_; } |
| 329 | |
| 330 | IC::UtilityId id() const { return id_; } |
| 331 | |
| 332 | private: |
| 333 | Address address_; |
| 334 | IC::UtilityId id_; |
| 335 | }; |
| 336 | |
| 337 | |
| 338 | class CallIC : public IC { |
| 339 | public: |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 340 | CallIC(Isolate* isolate, CallICNexus* nexus) |
| 341 | : IC(EXTRA_CALL_FRAME, isolate, nexus) { |
| 342 | DCHECK(nexus != NULL); |
| 343 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 344 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 345 | void PatchMegamorphic(Handle<Object> function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 346 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 347 | void HandleMiss(Handle<Object> receiver, Handle<Object> function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 348 | |
| 349 | // Returns true if a custom handler was installed. |
| 350 | bool DoCustomHandler(Handle<Object> receiver, Handle<Object> function, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 351 | const CallICState& callic_state); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 352 | |
| 353 | // Code generator routines. |
| 354 | static Handle<Code> initialize_stub(Isolate* isolate, int argc, |
| 355 | CallICState::CallType call_type); |
| 356 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 357 | static void Clear(Isolate* isolate, Code* host, CallICNexus* nexus); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 358 | }; |
| 359 | |
| 360 | |
| 361 | class LoadIC : public IC { |
| 362 | public: |
| 363 | static ExtraICState ComputeExtraICState(ContextualMode contextual_mode) { |
| 364 | return LoadICState(contextual_mode).GetExtraICState(); |
| 365 | } |
| 366 | |
| 367 | ContextualMode contextual_mode() const { |
| 368 | return LoadICState::GetContextualMode(extra_ic_state()); |
| 369 | } |
| 370 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 371 | LoadIC(FrameDepth depth, Isolate* isolate, FeedbackNexus* nexus = NULL) |
| 372 | : IC(depth, isolate, nexus) { |
| 373 | DCHECK(!FLAG_vector_ics || nexus != NULL); |
| 374 | DCHECK(IsLoadStub()); |
| 375 | } |
| 376 | |
| 377 | // TODO(mvstanton): The for_queries_only is because we have a case where we |
| 378 | // construct an IC only to gather the contextual mode, and we don't have |
| 379 | // vector/slot information. for_queries_only is a temporary hack to enable the |
| 380 | // strong DCHECK protection around vector/slot. |
| 381 | LoadIC(FrameDepth depth, Isolate* isolate, bool for_queries_only) |
| 382 | : IC(depth, isolate, NULL, for_queries_only) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 383 | DCHECK(IsLoadStub()); |
| 384 | } |
| 385 | |
| 386 | // Returns if this IC is for contextual (no explicit receiver) |
| 387 | // access to properties. |
| 388 | bool IsUndeclaredGlobal(Handle<Object> receiver) { |
| 389 | if (receiver->IsGlobalObject()) { |
| 390 | return contextual_mode() == CONTEXTUAL; |
| 391 | } else { |
| 392 | DCHECK(contextual_mode() != CONTEXTUAL); |
| 393 | return false; |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | // Code generator routines. |
| 398 | static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); } |
| 399 | static void GeneratePreMonomorphic(MacroAssembler* masm) { |
| 400 | GenerateMiss(masm); |
| 401 | } |
| 402 | static void GenerateMiss(MacroAssembler* masm); |
| 403 | static void GenerateNormal(MacroAssembler* masm); |
| 404 | static void GenerateRuntimeGetProperty(MacroAssembler* masm); |
| 405 | |
| 406 | static Handle<Code> initialize_stub(Isolate* isolate, |
| 407 | ExtraICState extra_state); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 408 | static Handle<Code> initialize_stub_in_optimized_code( |
| 409 | Isolate* isolate, ExtraICState extra_state); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 410 | |
| 411 | MUST_USE_RESULT MaybeHandle<Object> Load(Handle<Object> object, |
| 412 | Handle<Name> name); |
| 413 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 414 | static void Clear(Isolate* isolate, Code* host, LoadICNexus* nexus); |
| 415 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 416 | protected: |
| 417 | inline void set_target(Code* code); |
| 418 | |
| 419 | Handle<Code> slow_stub() const { |
| 420 | if (kind() == Code::LOAD_IC) { |
| 421 | return isolate()->builtins()->LoadIC_Slow(); |
| 422 | } else { |
| 423 | DCHECK_EQ(Code::KEYED_LOAD_IC, kind()); |
| 424 | return isolate()->builtins()->KeyedLoadIC_Slow(); |
| 425 | } |
| 426 | } |
| 427 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 428 | Handle<Code> megamorphic_stub() OVERRIDE; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 429 | |
| 430 | // Update the inline cache and the global stub cache based on the |
| 431 | // lookup result. |
| 432 | void UpdateCaches(LookupIterator* lookup); |
| 433 | |
| 434 | virtual Handle<Code> CompileHandler(LookupIterator* lookup, |
| 435 | Handle<Object> unused, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 436 | CacheHolderFlag cache_holder) OVERRIDE; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 437 | |
| 438 | private: |
| 439 | virtual Handle<Code> pre_monomorphic_stub() const; |
| 440 | static Handle<Code> pre_monomorphic_stub(Isolate* isolate, |
| 441 | ExtraICState extra_state); |
| 442 | |
| 443 | Handle<Code> SimpleFieldLoad(FieldIndex index); |
| 444 | |
| 445 | static void Clear(Isolate* isolate, Address address, Code* target, |
| 446 | ConstantPoolArray* constant_pool); |
| 447 | |
| 448 | friend class IC; |
| 449 | }; |
| 450 | |
| 451 | |
| 452 | class KeyedLoadIC : public LoadIC { |
| 453 | public: |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 454 | // ExtraICState bits (building on IC) |
| 455 | class IcCheckTypeField : public BitField<IcCheckType, 1, 1> {}; |
| 456 | |
| 457 | static ExtraICState ComputeExtraICState(ContextualMode contextual_mode, |
| 458 | IcCheckType key_type) { |
| 459 | return LoadICState(contextual_mode).GetExtraICState() | |
| 460 | IcCheckTypeField::encode(key_type); |
| 461 | } |
| 462 | |
| 463 | static IcCheckType GetKeyType(ExtraICState extra_state) { |
| 464 | return IcCheckTypeField::decode(extra_state); |
| 465 | } |
| 466 | |
| 467 | KeyedLoadIC(FrameDepth depth, Isolate* isolate, |
| 468 | KeyedLoadICNexus* nexus = NULL) |
| 469 | : LoadIC(depth, isolate, nexus) { |
| 470 | DCHECK(!FLAG_vector_ics || nexus != NULL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 471 | DCHECK(target()->is_keyed_load_stub()); |
| 472 | } |
| 473 | |
| 474 | MUST_USE_RESULT MaybeHandle<Object> Load(Handle<Object> object, |
| 475 | Handle<Object> key); |
| 476 | |
| 477 | // Code generator routines. |
| 478 | static void GenerateMiss(MacroAssembler* masm); |
| 479 | static void GenerateRuntimeGetProperty(MacroAssembler* masm); |
| 480 | static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); } |
| 481 | static void GeneratePreMonomorphic(MacroAssembler* masm) { |
| 482 | GenerateMiss(masm); |
| 483 | } |
| 484 | static void GenerateGeneric(MacroAssembler* masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 485 | |
| 486 | // Bit mask to be tested against bit field for the cases when |
| 487 | // generic stub should go into slow case. |
| 488 | // Access check is necessary explicitly since generic stub does not perform |
| 489 | // map checks. |
| 490 | static const int kSlowCaseBitFieldMask = |
| 491 | (1 << Map::kIsAccessCheckNeeded) | (1 << Map::kHasIndexedInterceptor); |
| 492 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 493 | static Handle<Code> initialize_stub(Isolate* isolate); |
| 494 | static Handle<Code> initialize_stub_in_optimized_code(Isolate* isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 495 | static Handle<Code> generic_stub(Isolate* isolate); |
| 496 | static Handle<Code> pre_monomorphic_stub(Isolate* isolate); |
| 497 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 498 | static void Clear(Isolate* isolate, Code* host, KeyedLoadICNexus* nexus); |
| 499 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 500 | protected: |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 501 | // receiver is HeapObject because it could be a String or a JSObject |
| 502 | Handle<Code> LoadElementStub(Handle<HeapObject> receiver); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 503 | virtual Handle<Code> pre_monomorphic_stub() const { |
| 504 | return pre_monomorphic_stub(isolate()); |
| 505 | } |
| 506 | |
| 507 | private: |
| 508 | Handle<Code> generic_stub() const { return generic_stub(isolate()); } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 509 | |
| 510 | static void Clear(Isolate* isolate, Address address, Code* target, |
| 511 | ConstantPoolArray* constant_pool); |
| 512 | |
| 513 | friend class IC; |
| 514 | }; |
| 515 | |
| 516 | |
| 517 | class StoreIC : public IC { |
| 518 | public: |
| 519 | class StrictModeState : public BitField<StrictMode, 1, 1> {}; |
| 520 | static ExtraICState ComputeExtraICState(StrictMode flag) { |
| 521 | return StrictModeState::encode(flag); |
| 522 | } |
| 523 | static StrictMode GetStrictMode(ExtraICState state) { |
| 524 | return StrictModeState::decode(state); |
| 525 | } |
| 526 | |
| 527 | // For convenience, a statically declared encoding of strict mode extra |
| 528 | // IC state. |
| 529 | static const ExtraICState kStrictModeState = 1 << StrictModeState::kShift; |
| 530 | |
| 531 | StoreIC(FrameDepth depth, Isolate* isolate) : IC(depth, isolate) { |
| 532 | DCHECK(IsStoreStub()); |
| 533 | } |
| 534 | |
| 535 | StrictMode strict_mode() const { |
| 536 | return StrictModeState::decode(extra_ic_state()); |
| 537 | } |
| 538 | |
| 539 | // Code generators for stub routines. Only called once at startup. |
| 540 | static void GenerateSlow(MacroAssembler* masm); |
| 541 | static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); } |
| 542 | static void GeneratePreMonomorphic(MacroAssembler* masm) { |
| 543 | GenerateMiss(masm); |
| 544 | } |
| 545 | static void GenerateMiss(MacroAssembler* masm); |
| 546 | static void GenerateMegamorphic(MacroAssembler* masm); |
| 547 | static void GenerateNormal(MacroAssembler* masm); |
| 548 | static void GenerateRuntimeSetProperty(MacroAssembler* masm, |
| 549 | StrictMode strict_mode); |
| 550 | |
| 551 | static Handle<Code> initialize_stub(Isolate* isolate, StrictMode strict_mode); |
| 552 | |
| 553 | MUST_USE_RESULT MaybeHandle<Object> Store( |
| 554 | Handle<Object> object, Handle<Name> name, Handle<Object> value, |
| 555 | JSReceiver::StoreFromKeyed store_mode = |
| 556 | JSReceiver::CERTAINLY_NOT_STORE_FROM_KEYED); |
| 557 | |
| 558 | bool LookupForWrite(LookupIterator* it, Handle<Object> value, |
| 559 | JSReceiver::StoreFromKeyed store_mode); |
| 560 | |
| 561 | protected: |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 562 | Handle<Code> megamorphic_stub() OVERRIDE; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 563 | |
| 564 | // Stub accessors. |
| 565 | Handle<Code> generic_stub() const; |
| 566 | |
| 567 | Handle<Code> slow_stub() const; |
| 568 | |
| 569 | virtual Handle<Code> pre_monomorphic_stub() const { |
| 570 | return pre_monomorphic_stub(isolate(), strict_mode()); |
| 571 | } |
| 572 | |
| 573 | static Handle<Code> pre_monomorphic_stub(Isolate* isolate, |
| 574 | StrictMode strict_mode); |
| 575 | |
| 576 | // Update the inline cache and the global stub cache based on the |
| 577 | // lookup result. |
| 578 | void UpdateCaches(LookupIterator* lookup, Handle<Object> value, |
| 579 | JSReceiver::StoreFromKeyed store_mode); |
| 580 | virtual Handle<Code> CompileHandler(LookupIterator* lookup, |
| 581 | Handle<Object> value, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 582 | CacheHolderFlag cache_holder) OVERRIDE; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 583 | |
| 584 | private: |
| 585 | inline void set_target(Code* code); |
| 586 | |
| 587 | static void Clear(Isolate* isolate, Address address, Code* target, |
| 588 | ConstantPoolArray* constant_pool); |
| 589 | |
| 590 | friend class IC; |
| 591 | }; |
| 592 | |
| 593 | |
| 594 | enum KeyedStoreCheckMap { kDontCheckMap, kCheckMap }; |
| 595 | |
| 596 | |
| 597 | enum KeyedStoreIncrementLength { kDontIncrementLength, kIncrementLength }; |
| 598 | |
| 599 | |
| 600 | class KeyedStoreIC : public StoreIC { |
| 601 | public: |
| 602 | // ExtraICState bits (building on IC) |
| 603 | // ExtraICState bits |
| 604 | class ExtraICStateKeyedAccessStoreMode |
| 605 | : public BitField<KeyedAccessStoreMode, 2, 4> {}; // NOLINT |
| 606 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 607 | class IcCheckTypeField : public BitField<IcCheckType, 6, 1> {}; |
| 608 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 609 | static ExtraICState ComputeExtraICState(StrictMode flag, |
| 610 | KeyedAccessStoreMode mode) { |
| 611 | return StrictModeState::encode(flag) | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 612 | ExtraICStateKeyedAccessStoreMode::encode(mode) | |
| 613 | IcCheckTypeField::encode(ELEMENT); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 614 | } |
| 615 | |
| 616 | static KeyedAccessStoreMode GetKeyedAccessStoreMode( |
| 617 | ExtraICState extra_state) { |
| 618 | return ExtraICStateKeyedAccessStoreMode::decode(extra_state); |
| 619 | } |
| 620 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 621 | static IcCheckType GetKeyType(ExtraICState extra_state) { |
| 622 | return IcCheckTypeField::decode(extra_state); |
| 623 | } |
| 624 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 625 | KeyedStoreIC(FrameDepth depth, Isolate* isolate) : StoreIC(depth, isolate) { |
| 626 | DCHECK(target()->is_keyed_store_stub()); |
| 627 | } |
| 628 | |
| 629 | MUST_USE_RESULT MaybeHandle<Object> Store(Handle<Object> object, |
| 630 | Handle<Object> name, |
| 631 | Handle<Object> value); |
| 632 | |
| 633 | // Code generators for stub routines. Only called once at startup. |
| 634 | static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); } |
| 635 | static void GeneratePreMonomorphic(MacroAssembler* masm) { |
| 636 | GenerateMiss(masm); |
| 637 | } |
| 638 | static void GenerateMiss(MacroAssembler* masm); |
| 639 | static void GenerateSlow(MacroAssembler* masm); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 640 | static void GenerateMegamorphic(MacroAssembler* masm, StrictMode strict_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 641 | static void GenerateGeneric(MacroAssembler* masm, StrictMode strict_mode); |
| 642 | static void GenerateSloppyArguments(MacroAssembler* masm); |
| 643 | |
| 644 | protected: |
| 645 | virtual Handle<Code> pre_monomorphic_stub() const { |
| 646 | return pre_monomorphic_stub(isolate(), strict_mode()); |
| 647 | } |
| 648 | static Handle<Code> pre_monomorphic_stub(Isolate* isolate, |
| 649 | StrictMode strict_mode) { |
| 650 | if (strict_mode == STRICT) { |
| 651 | return isolate->builtins()->KeyedStoreIC_PreMonomorphic_Strict(); |
| 652 | } else { |
| 653 | return isolate->builtins()->KeyedStoreIC_PreMonomorphic(); |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | Handle<Code> StoreElementStub(Handle<JSObject> receiver, |
| 658 | KeyedAccessStoreMode store_mode); |
| 659 | |
| 660 | private: |
| 661 | inline void set_target(Code* code); |
| 662 | |
| 663 | // Stub accessors. |
| 664 | Handle<Code> sloppy_arguments_stub() { |
| 665 | return isolate()->builtins()->KeyedStoreIC_SloppyArguments(); |
| 666 | } |
| 667 | |
| 668 | static void Clear(Isolate* isolate, Address address, Code* target, |
| 669 | ConstantPoolArray* constant_pool); |
| 670 | |
| 671 | KeyedAccessStoreMode GetStoreMode(Handle<JSObject> receiver, |
| 672 | Handle<Object> key, Handle<Object> value); |
| 673 | |
| 674 | Handle<Map> ComputeTransitionedMap(Handle<Map> map, |
| 675 | KeyedAccessStoreMode store_mode); |
| 676 | |
| 677 | friend class IC; |
| 678 | }; |
| 679 | |
| 680 | |
| 681 | // Type Recording BinaryOpIC, that records the types of the inputs and outputs. |
| 682 | class BinaryOpIC : public IC { |
| 683 | public: |
| 684 | explicit BinaryOpIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {} |
| 685 | |
| 686 | static Builtins::JavaScript TokenToJSBuiltin(Token::Value op); |
| 687 | |
| 688 | MaybeHandle<Object> Transition(Handle<AllocationSite> allocation_site, |
| 689 | Handle<Object> left, |
| 690 | Handle<Object> right) WARN_UNUSED_RESULT; |
| 691 | }; |
| 692 | |
| 693 | |
| 694 | class CompareIC : public IC { |
| 695 | public: |
| 696 | CompareIC(Isolate* isolate, Token::Value op) |
| 697 | : IC(EXTRA_CALL_FRAME, isolate), op_(op) {} |
| 698 | |
| 699 | // Update the inline cache for the given operands. |
| 700 | Code* UpdateCaches(Handle<Object> x, Handle<Object> y); |
| 701 | |
| 702 | // Helper function for computing the condition for a compare operation. |
| 703 | static Condition ComputeCondition(Token::Value op); |
| 704 | |
| 705 | // Factory method for getting an uninitialized compare stub. |
| 706 | static Handle<Code> GetUninitialized(Isolate* isolate, Token::Value op); |
| 707 | |
| 708 | private: |
| 709 | static bool HasInlinedSmiCode(Address address); |
| 710 | |
| 711 | bool strict() const { return op_ == Token::EQ_STRICT; } |
| 712 | Condition GetCondition() const { return ComputeCondition(op_); } |
| 713 | |
| 714 | static Code* GetRawUninitialized(Isolate* isolate, Token::Value op); |
| 715 | |
| 716 | static void Clear(Isolate* isolate, Address address, Code* target, |
| 717 | ConstantPoolArray* constant_pool); |
| 718 | |
| 719 | Token::Value op_; |
| 720 | |
| 721 | friend class IC; |
| 722 | }; |
| 723 | |
| 724 | |
| 725 | class CompareNilIC : public IC { |
| 726 | public: |
| 727 | explicit CompareNilIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {} |
| 728 | |
| 729 | Handle<Object> CompareNil(Handle<Object> object); |
| 730 | |
| 731 | static Handle<Code> GetUninitialized(); |
| 732 | |
| 733 | static void Clear(Address address, Code* target, |
| 734 | ConstantPoolArray* constant_pool); |
| 735 | |
| 736 | static Handle<Object> DoCompareNilSlow(Isolate* isolate, NilValue nil, |
| 737 | Handle<Object> object); |
| 738 | }; |
| 739 | |
| 740 | |
| 741 | class ToBooleanIC : public IC { |
| 742 | public: |
| 743 | explicit ToBooleanIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {} |
| 744 | |
| 745 | Handle<Object> ToBoolean(Handle<Object> object); |
| 746 | }; |
| 747 | |
| 748 | |
| 749 | // Helper for BinaryOpIC and CompareIC. |
| 750 | enum InlinedSmiCheck { ENABLE_INLINED_SMI_CHECK, DISABLE_INLINED_SMI_CHECK }; |
| 751 | void PatchInlinedSmiCode(Address address, InlinedSmiCheck check); |
| 752 | |
| 753 | DECLARE_RUNTIME_FUNCTION(KeyedLoadIC_MissFromStubFailure); |
| 754 | DECLARE_RUNTIME_FUNCTION(KeyedStoreIC_MissFromStubFailure); |
| 755 | DECLARE_RUNTIME_FUNCTION(UnaryOpIC_Miss); |
| 756 | DECLARE_RUNTIME_FUNCTION(StoreIC_MissFromStubFailure); |
| 757 | DECLARE_RUNTIME_FUNCTION(ElementsTransitionAndStoreIC_Miss); |
| 758 | DECLARE_RUNTIME_FUNCTION(BinaryOpIC_Miss); |
| 759 | DECLARE_RUNTIME_FUNCTION(BinaryOpIC_MissWithAllocationSite); |
| 760 | DECLARE_RUNTIME_FUNCTION(CompareNilIC_Miss); |
| 761 | DECLARE_RUNTIME_FUNCTION(ToBooleanIC_Miss); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 762 | DECLARE_RUNTIME_FUNCTION(LoadIC_MissFromStubFailure); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 763 | |
| 764 | // Support functions for callbacks handlers. |
| 765 | DECLARE_RUNTIME_FUNCTION(StoreCallbackProperty); |
| 766 | |
| 767 | // Support functions for interceptor handlers. |
| 768 | DECLARE_RUNTIME_FUNCTION(LoadPropertyWithInterceptorOnly); |
| 769 | DECLARE_RUNTIME_FUNCTION(LoadPropertyWithInterceptor); |
| 770 | DECLARE_RUNTIME_FUNCTION(LoadElementWithInterceptor); |
| 771 | DECLARE_RUNTIME_FUNCTION(StorePropertyWithInterceptor); |
| 772 | } |
| 773 | } // namespace v8::internal |
| 774 | |
| 775 | #endif // V8_IC_H_ |