| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/ic/ic.h" |
| |
| #include "src/accessors.h" |
| #include "src/api-arguments-inl.h" |
| #include "src/api.h" |
| #include "src/arguments.h" |
| #include "src/base/bits.h" |
| #include "src/codegen.h" |
| #include "src/conversions.h" |
| #include "src/execution.h" |
| #include "src/field-type.h" |
| #include "src/frames-inl.h" |
| #include "src/ic/call-optimization.h" |
| #include "src/ic/handler-compiler.h" |
| #include "src/ic/ic-compiler.h" |
| #include "src/ic/ic-inl.h" |
| #include "src/ic/stub-cache.h" |
| #include "src/isolate-inl.h" |
| #include "src/macro-assembler.h" |
| #include "src/prototype.h" |
| #include "src/runtime/runtime-utils.h" |
| #include "src/runtime/runtime.h" |
| #include "src/tracing/trace-event.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| char IC::TransitionMarkFromState(IC::State state) { |
| switch (state) { |
| case UNINITIALIZED: |
| return '0'; |
| case PREMONOMORPHIC: |
| return '.'; |
| case MONOMORPHIC: |
| return '1'; |
| case RECOMPUTE_HANDLER: |
| return '^'; |
| case POLYMORPHIC: |
| return 'P'; |
| case MEGAMORPHIC: |
| return 'N'; |
| case GENERIC: |
| return 'G'; |
| } |
| UNREACHABLE(); |
| return 0; |
| } |
| |
| |
| const char* GetTransitionMarkModifier(KeyedAccessStoreMode mode) { |
| if (mode == STORE_NO_TRANSITION_HANDLE_COW) return ".COW"; |
| if (mode == STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS) { |
| return ".IGNORE_OOB"; |
| } |
| if (IsGrowStoreMode(mode)) return ".GROW"; |
| return ""; |
| } |
| |
| |
| #ifdef DEBUG |
| |
| #define TRACE_GENERIC_IC(isolate, type, reason) \ |
| do { \ |
| if (FLAG_trace_ic) { \ |
| PrintF("[%s patching generic stub in ", type); \ |
| JavaScriptFrame::PrintTop(isolate, stdout, false, true); \ |
| PrintF(" (%s)]\n", reason); \ |
| } \ |
| } while (false) |
| |
| #else |
| |
| #define TRACE_GENERIC_IC(isolate, type, reason) \ |
| do { \ |
| if (FLAG_trace_ic) { \ |
| PrintF("[%s patching generic stub in ", type); \ |
| PrintF("(see below) (%s)]\n", reason); \ |
| } \ |
| } while (false) |
| |
| #endif // DEBUG |
| |
| |
| void IC::TraceIC(const char* type, Handle<Object> name) { |
| if (FLAG_trace_ic) { |
| if (AddressIsDeoptimizedCode()) return; |
| DCHECK(UseVector()); |
| State new_state = nexus()->StateFromFeedback(); |
| TraceIC(type, name, state(), new_state); |
| } |
| } |
| |
| |
| void IC::TraceIC(const char* type, Handle<Object> name, State old_state, |
| State new_state) { |
| if (FLAG_trace_ic) { |
| PrintF("[%s%s in ", is_keyed() ? "Keyed" : "", type); |
| |
| // TODO(jkummerow): Add support for "apply". The logic is roughly: |
| // marker = [fp_ + kMarkerOffset]; |
| // if marker is smi and marker.value == INTERNAL and |
| // the frame's code == builtin(Builtins::kFunctionApply): |
| // then print "apply from" and advance one frame |
| |
| Object* maybe_function = |
| Memory::Object_at(fp_ + JavaScriptFrameConstants::kFunctionOffset); |
| if (maybe_function->IsJSFunction()) { |
| JSFunction* function = JSFunction::cast(maybe_function); |
| JavaScriptFrame::PrintFunctionAndOffset(function, function->code(), pc(), |
| stdout, true); |
| } |
| |
| const char* modifier = ""; |
| if (kind() == Code::KEYED_STORE_IC) { |
| KeyedAccessStoreMode mode = |
| casted_nexus<KeyedStoreICNexus>()->GetKeyedAccessStoreMode(); |
| modifier = GetTransitionMarkModifier(mode); |
| } |
| void* map = nullptr; |
| if (!receiver_map().is_null()) { |
| map = reinterpret_cast<void*>(*receiver_map()); |
| } |
| PrintF(" (%c->%c%s) map=%p ", TransitionMarkFromState(old_state), |
| TransitionMarkFromState(new_state), modifier, map); |
| name->ShortPrint(stdout); |
| PrintF("]\n"); |
| } |
| } |
| |
| |
| #define TRACE_IC(type, name) TraceIC(type, name) |
| |
| |
| IC::IC(FrameDepth depth, Isolate* isolate, FeedbackNexus* nexus) |
| : isolate_(isolate), |
| vector_set_(false), |
| target_maps_set_(false), |
| nexus_(nexus) { |
| // To improve the performance of the (much used) IC code, we unfold a few |
| // levels of the stack frame iteration code. This yields a ~35% speedup when |
| // running DeltaBlue and a ~25% speedup of gbemu with the '--nouse-ic' flag. |
| const Address entry = Isolate::c_entry_fp(isolate->thread_local_top()); |
| Address* constant_pool = NULL; |
| if (FLAG_enable_embedded_constant_pool) { |
| constant_pool = reinterpret_cast<Address*>( |
| entry + ExitFrameConstants::kConstantPoolOffset); |
| } |
| Address* pc_address = |
| reinterpret_cast<Address*>(entry + ExitFrameConstants::kCallerPCOffset); |
| Address fp = Memory::Address_at(entry + ExitFrameConstants::kCallerFPOffset); |
| // If there's another JavaScript frame on the stack or a |
| // StubFailureTrampoline, we need to look one frame further down the stack to |
| // find the frame pointer and the return address stack slot. |
| if (depth == EXTRA_CALL_FRAME) { |
| if (FLAG_enable_embedded_constant_pool) { |
| constant_pool = reinterpret_cast<Address*>( |
| fp + StandardFrameConstants::kConstantPoolOffset); |
| } |
| const int kCallerPCOffset = StandardFrameConstants::kCallerPCOffset; |
| pc_address = reinterpret_cast<Address*>(fp + kCallerPCOffset); |
| fp = Memory::Address_at(fp + StandardFrameConstants::kCallerFPOffset); |
| } |
| #ifdef DEBUG |
| StackFrameIterator it(isolate); |
| for (int i = 0; i < depth + 1; i++) it.Advance(); |
| StackFrame* frame = it.frame(); |
| DCHECK(fp == frame->fp() && pc_address == frame->pc_address()); |
| #endif |
| fp_ = fp; |
| if (FLAG_enable_embedded_constant_pool) { |
| constant_pool_address_ = constant_pool; |
| } |
| pc_address_ = StackFrame::ResolveReturnAddressLocation(pc_address); |
| Code* target = this->target(); |
| kind_ = target->kind(); |
| state_ = UseVector() ? nexus->StateFromFeedback() : StateFromCode(target); |
| old_state_ = state_; |
| extra_ic_state_ = target->extra_ic_state(); |
| } |
| |
| InlineCacheState IC::StateFromCode(Code* code) { |
| Isolate* isolate = code->GetIsolate(); |
| switch (code->kind()) { |
| case Code::BINARY_OP_IC: { |
| BinaryOpICState state(isolate, code->extra_ic_state()); |
| return state.GetICState(); |
| } |
| case Code::COMPARE_IC: { |
| CompareICStub stub(isolate, code->extra_ic_state()); |
| return stub.GetICState(); |
| } |
| case Code::TO_BOOLEAN_IC: { |
| ToBooleanICStub stub(isolate, code->extra_ic_state()); |
| return stub.GetICState(); |
| } |
| default: |
| if (code->is_debug_stub()) return UNINITIALIZED; |
| UNREACHABLE(); |
| return UNINITIALIZED; |
| } |
| } |
| |
| SharedFunctionInfo* IC::GetSharedFunctionInfo() const { |
| // Compute the JavaScript frame for the frame pointer of this IC |
| // structure. We need this to be able to find the function |
| // corresponding to the frame. |
| StackFrameIterator it(isolate()); |
| while (it.frame()->fp() != this->fp()) it.Advance(); |
| if (FLAG_ignition && it.frame()->type() == StackFrame::STUB) { |
| // Advance over bytecode handler frame. |
| // TODO(rmcilroy): Remove this once bytecode handlers don't need a frame. |
| it.Advance(); |
| } |
| JavaScriptFrame* frame = JavaScriptFrame::cast(it.frame()); |
| // Find the function on the stack and both the active code for the |
| // function and the original code. |
| JSFunction* function = frame->function(); |
| return function->shared(); |
| } |
| |
| |
| Code* IC::GetCode() const { |
| HandleScope scope(isolate()); |
| Handle<SharedFunctionInfo> shared(GetSharedFunctionInfo(), isolate()); |
| Code* code = shared->code(); |
| return code; |
| } |
| |
| |
| bool IC::AddressIsOptimizedCode() const { |
| Code* host = |
| isolate()->inner_pointer_to_code_cache()->GetCacheEntry(address())->code; |
| return host->kind() == Code::OPTIMIZED_FUNCTION; |
| } |
| |
| static void LookupForRead(LookupIterator* it) { |
| for (; it->IsFound(); it->Next()) { |
| switch (it->state()) { |
| case LookupIterator::NOT_FOUND: |
| case LookupIterator::TRANSITION: |
| UNREACHABLE(); |
| case LookupIterator::JSPROXY: |
| return; |
| case LookupIterator::INTERCEPTOR: { |
| // If there is a getter, return; otherwise loop to perform the lookup. |
| Handle<JSObject> holder = it->GetHolder<JSObject>(); |
| if (!holder->GetNamedInterceptor()->getter()->IsUndefined( |
| it->isolate())) { |
| return; |
| } |
| break; |
| } |
| case LookupIterator::ACCESS_CHECK: |
| // PropertyHandlerCompiler::CheckPrototypes() knows how to emit |
| // access checks for global proxies. |
| if (it->GetHolder<JSObject>()->IsJSGlobalProxy() && it->HasAccess()) { |
| break; |
| } |
| return; |
| case LookupIterator::ACCESSOR: |
| case LookupIterator::INTEGER_INDEXED_EXOTIC: |
| case LookupIterator::DATA: |
| return; |
| } |
| } |
| } |
| |
| bool IC::ShouldRecomputeHandler(Handle<Object> receiver, Handle<String> name) { |
| if (!RecomputeHandlerForName(name)) return false; |
| |
| DCHECK(UseVector()); |
| maybe_handler_ = nexus()->FindHandlerForMap(receiver_map()); |
| |
| // This is a contextual access, always just update the handler and stay |
| // monomorphic. |
| if (kind() == Code::LOAD_GLOBAL_IC) return true; |
| |
| // The current map wasn't handled yet. There's no reason to stay monomorphic, |
| // *unless* we're moving from a deprecated map to its replacement, or |
| // to a more general elements kind. |
| // TODO(verwaest): Check if the current map is actually what the old map |
| // would transition to. |
| if (maybe_handler_.is_null()) { |
| if (!receiver_map()->IsJSObjectMap()) return false; |
| Map* first_map = FirstTargetMap(); |
| if (first_map == NULL) return false; |
| Handle<Map> old_map(first_map); |
| if (old_map->is_deprecated()) return true; |
| return IsMoreGeneralElementsKindTransition(old_map->elements_kind(), |
| receiver_map()->elements_kind()); |
| } |
| |
| return true; |
| } |
| |
| bool IC::RecomputeHandlerForName(Handle<Object> name) { |
| if (is_keyed()) { |
| // Determine whether the failure is due to a name failure. |
| if (!name->IsName()) return false; |
| DCHECK(UseVector()); |
| Name* stub_name = nexus()->FindFirstName(); |
| if (*name != stub_name) return false; |
| } |
| |
| return true; |
| } |
| |
| |
| void IC::UpdateState(Handle<Object> receiver, Handle<Object> name) { |
| update_receiver_map(receiver); |
| if (!name->IsString()) return; |
| if (state() != MONOMORPHIC && state() != POLYMORPHIC) return; |
| if (receiver->IsUndefined(isolate()) || receiver->IsNull(isolate())) return; |
| |
| // Remove the target from the code cache if it became invalid |
| // because of changes in the prototype chain to avoid hitting it |
| // again. |
| if (ShouldRecomputeHandler(receiver, Handle<String>::cast(name))) { |
| MarkRecomputeHandler(name); |
| } |
| } |
| |
| |
| MaybeHandle<Object> IC::TypeError(MessageTemplate::Template index, |
| Handle<Object> object, Handle<Object> key) { |
| HandleScope scope(isolate()); |
| THROW_NEW_ERROR(isolate(), NewTypeError(index, key, object), Object); |
| } |
| |
| |
| MaybeHandle<Object> IC::ReferenceError(Handle<Name> name) { |
| HandleScope scope(isolate()); |
| THROW_NEW_ERROR( |
| isolate(), NewReferenceError(MessageTemplate::kNotDefined, name), Object); |
| } |
| |
| |
| static void ComputeTypeInfoCountDelta(IC::State old_state, IC::State new_state, |
| int* polymorphic_delta, |
| int* generic_delta) { |
| switch (old_state) { |
| case UNINITIALIZED: |
| case PREMONOMORPHIC: |
| if (new_state == UNINITIALIZED || new_state == PREMONOMORPHIC) break; |
| if (new_state == MONOMORPHIC || new_state == POLYMORPHIC) { |
| *polymorphic_delta = 1; |
| } else if (new_state == MEGAMORPHIC || new_state == GENERIC) { |
| *generic_delta = 1; |
| } |
| break; |
| case MONOMORPHIC: |
| case POLYMORPHIC: |
| if (new_state == MONOMORPHIC || new_state == POLYMORPHIC) break; |
| *polymorphic_delta = -1; |
| if (new_state == MEGAMORPHIC || new_state == GENERIC) { |
| *generic_delta = 1; |
| } |
| break; |
| case MEGAMORPHIC: |
| case GENERIC: |
| if (new_state == MEGAMORPHIC || new_state == GENERIC) break; |
| *generic_delta = -1; |
| if (new_state == MONOMORPHIC || new_state == POLYMORPHIC) { |
| *polymorphic_delta = 1; |
| } |
| break; |
| case RECOMPUTE_HANDLER: |
| UNREACHABLE(); |
| } |
| } |
| |
| // static |
| void IC::OnTypeFeedbackChanged(Isolate* isolate, Code* host) { |
| if (host->kind() != Code::FUNCTION) return; |
| |
| TypeFeedbackInfo* info = TypeFeedbackInfo::cast(host->type_feedback_info()); |
| info->change_own_type_change_checksum(); |
| host->set_profiler_ticks(0); |
| isolate->runtime_profiler()->NotifyICChanged(); |
| // TODO(2029): When an optimized function is patched, it would |
| // be nice to propagate the corresponding type information to its |
| // unoptimized version for the benefit of later inlining. |
| } |
| |
| void IC::PostPatching(Address address, Code* target, Code* old_target) { |
| // Type vector based ICs update these statistics at a different time because |
| // they don't always patch on state change. |
| if (ICUseVector(target->kind())) return; |
| |
| DCHECK(old_target->is_inline_cache_stub()); |
| DCHECK(target->is_inline_cache_stub()); |
| State old_state = StateFromCode(old_target); |
| State new_state = StateFromCode(target); |
| |
| Isolate* isolate = target->GetIsolate(); |
| Code* host = |
| isolate->inner_pointer_to_code_cache()->GetCacheEntry(address)->code; |
| if (host->kind() != Code::FUNCTION) return; |
| |
| // Not all Code objects have TypeFeedbackInfo. |
| if (host->type_feedback_info()->IsTypeFeedbackInfo()) { |
| if (FLAG_type_info_threshold > 0) { |
| int polymorphic_delta = 0; // "Polymorphic" here includes monomorphic. |
| int generic_delta = 0; // "Generic" here includes megamorphic. |
| ComputeTypeInfoCountDelta(old_state, new_state, &polymorphic_delta, |
| &generic_delta); |
| TypeFeedbackInfo* info = |
| TypeFeedbackInfo::cast(host->type_feedback_info()); |
| info->change_ic_with_type_info_count(polymorphic_delta); |
| info->change_ic_generic_count(generic_delta); |
| } |
| TypeFeedbackInfo* info = TypeFeedbackInfo::cast(host->type_feedback_info()); |
| info->change_own_type_change_checksum(); |
| } |
| host->set_profiler_ticks(0); |
| isolate->runtime_profiler()->NotifyICChanged(); |
| // TODO(2029): When an optimized function is patched, it would |
| // be nice to propagate the corresponding type information to its |
| // unoptimized version for the benefit of later inlining. |
| } |
| |
| void IC::Clear(Isolate* isolate, Address address, Address constant_pool) { |
| Code* target = GetTargetAtAddress(address, constant_pool); |
| |
| // Don't clear debug break inline cache as it will remove the break point. |
| if (target->is_debug_stub()) return; |
| |
| if (target->kind() == Code::COMPARE_IC) { |
| CompareIC::Clear(isolate, address, target, constant_pool); |
| } |
| } |
| |
| |
| void KeyedLoadIC::Clear(Isolate* isolate, Code* host, KeyedLoadICNexus* nexus) { |
| if (IsCleared(nexus)) return; |
| // Make sure to also clear the map used in inline fast cases. If we |
| // do not clear these maps, cached code can keep objects alive |
| // through the embedded maps. |
| nexus->ConfigurePremonomorphic(); |
| OnTypeFeedbackChanged(isolate, host); |
| } |
| |
| |
| void CallIC::Clear(Isolate* isolate, Code* host, CallICNexus* nexus) { |
| // Determine our state. |
| Object* feedback = nexus->vector()->Get(nexus->slot()); |
| State state = nexus->StateFromFeedback(); |
| |
| if (state != UNINITIALIZED && !feedback->IsAllocationSite()) { |
| nexus->ConfigureUninitialized(); |
| // The change in state must be processed. |
| OnTypeFeedbackChanged(isolate, host); |
| } |
| } |
| |
| |
| void LoadIC::Clear(Isolate* isolate, Code* host, LoadICNexus* nexus) { |
| if (IsCleared(nexus)) return; |
| nexus->ConfigurePremonomorphic(); |
| OnTypeFeedbackChanged(isolate, host); |
| } |
| |
| void LoadGlobalIC::Clear(Isolate* isolate, Code* host, |
| LoadGlobalICNexus* nexus) { |
| if (IsCleared(nexus)) return; |
| nexus->ConfigureUninitialized(); |
| OnTypeFeedbackChanged(isolate, host); |
| } |
| |
| void StoreIC::Clear(Isolate* isolate, Code* host, StoreICNexus* nexus) { |
| if (IsCleared(nexus)) return; |
| nexus->ConfigurePremonomorphic(); |
| OnTypeFeedbackChanged(isolate, host); |
| } |
| |
| |
| void KeyedStoreIC::Clear(Isolate* isolate, Code* host, |
| KeyedStoreICNexus* nexus) { |
| if (IsCleared(nexus)) return; |
| nexus->ConfigurePremonomorphic(); |
| OnTypeFeedbackChanged(isolate, host); |
| } |
| |
| |
| void CompareIC::Clear(Isolate* isolate, Address address, Code* target, |
| Address constant_pool) { |
| DCHECK(CodeStub::GetMajorKey(target) == CodeStub::CompareIC); |
| CompareICStub stub(target->stub_key(), isolate); |
| // Only clear CompareICs that can retain objects. |
| if (stub.state() != CompareICState::KNOWN_RECEIVER) return; |
| SetTargetAtAddress(address, GetRawUninitialized(isolate, stub.op()), |
| constant_pool); |
| PatchInlinedSmiCode(isolate, address, DISABLE_INLINED_SMI_CHECK); |
| } |
| |
| |
| // static |
| Handle<Code> KeyedLoadIC::ChooseMegamorphicStub(Isolate* isolate, |
| ExtraICState extra_state) { |
| // TODO(ishell): remove extra_ic_state |
| if (FLAG_compiled_keyed_generic_loads) { |
| return KeyedLoadGenericStub(isolate).GetCode(); |
| } else { |
| return isolate->builtins()->KeyedLoadIC_Megamorphic(); |
| } |
| } |
| |
| |
| static bool MigrateDeprecated(Handle<Object> object) { |
| if (!object->IsJSObject()) return false; |
| Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| if (!receiver->map()->is_deprecated()) return false; |
| JSObject::MigrateInstance(Handle<JSObject>::cast(object)); |
| return true; |
| } |
| |
| void IC::ConfigureVectorState(IC::State new_state, Handle<Object> key) { |
| DCHECK(UseVector()); |
| if (new_state == PREMONOMORPHIC) { |
| nexus()->ConfigurePremonomorphic(); |
| } else if (new_state == MEGAMORPHIC) { |
| if (kind() == Code::LOAD_IC || kind() == Code::STORE_IC) { |
| nexus()->ConfigureMegamorphic(); |
| } else if (kind() == Code::KEYED_LOAD_IC) { |
| KeyedLoadICNexus* nexus = casted_nexus<KeyedLoadICNexus>(); |
| nexus->ConfigureMegamorphicKeyed(key->IsName() ? PROPERTY : ELEMENT); |
| } else { |
| DCHECK(kind() == Code::KEYED_STORE_IC); |
| KeyedStoreICNexus* nexus = casted_nexus<KeyedStoreICNexus>(); |
| nexus->ConfigureMegamorphicKeyed(key->IsName() ? PROPERTY : ELEMENT); |
| } |
| } else { |
| UNREACHABLE(); |
| } |
| |
| vector_set_ = true; |
| OnTypeFeedbackChanged(isolate(), get_host()); |
| } |
| |
| |
| void IC::ConfigureVectorState(Handle<Name> name, Handle<Map> map, |
| Handle<Code> handler) { |
| DCHECK(UseVector()); |
| if (kind() == Code::LOAD_IC) { |
| LoadICNexus* nexus = casted_nexus<LoadICNexus>(); |
| nexus->ConfigureMonomorphic(map, handler); |
| } else if (kind() == Code::LOAD_GLOBAL_IC) { |
| LoadGlobalICNexus* nexus = casted_nexus<LoadGlobalICNexus>(); |
| nexus->ConfigureHandlerMode(handler); |
| } else if (kind() == Code::KEYED_LOAD_IC) { |
| KeyedLoadICNexus* nexus = casted_nexus<KeyedLoadICNexus>(); |
| nexus->ConfigureMonomorphic(name, map, handler); |
| } else if (kind() == Code::STORE_IC) { |
| StoreICNexus* nexus = casted_nexus<StoreICNexus>(); |
| nexus->ConfigureMonomorphic(map, handler); |
| } else { |
| DCHECK(kind() == Code::KEYED_STORE_IC); |
| KeyedStoreICNexus* nexus = casted_nexus<KeyedStoreICNexus>(); |
| nexus->ConfigureMonomorphic(name, map, handler); |
| } |
| |
| vector_set_ = true; |
| OnTypeFeedbackChanged(isolate(), get_host()); |
| } |
| |
| |
| void IC::ConfigureVectorState(Handle<Name> name, MapHandleList* maps, |
| CodeHandleList* handlers) { |
| DCHECK(UseVector()); |
| if (kind() == Code::LOAD_IC) { |
| LoadICNexus* nexus = casted_nexus<LoadICNexus>(); |
| nexus->ConfigurePolymorphic(maps, handlers); |
| } else if (kind() == Code::KEYED_LOAD_IC) { |
| KeyedLoadICNexus* nexus = casted_nexus<KeyedLoadICNexus>(); |
| nexus->ConfigurePolymorphic(name, maps, handlers); |
| } else if (kind() == Code::STORE_IC) { |
| StoreICNexus* nexus = casted_nexus<StoreICNexus>(); |
| nexus->ConfigurePolymorphic(maps, handlers); |
| } else { |
| DCHECK(kind() == Code::KEYED_STORE_IC); |
| KeyedStoreICNexus* nexus = casted_nexus<KeyedStoreICNexus>(); |
| nexus->ConfigurePolymorphic(name, maps, handlers); |
| } |
| |
| vector_set_ = true; |
| OnTypeFeedbackChanged(isolate(), get_host()); |
| } |
| |
| |
| void IC::ConfigureVectorState(MapHandleList* maps, |
| MapHandleList* transitioned_maps, |
| CodeHandleList* handlers) { |
| DCHECK(UseVector()); |
| DCHECK(kind() == Code::KEYED_STORE_IC); |
| KeyedStoreICNexus* nexus = casted_nexus<KeyedStoreICNexus>(); |
| nexus->ConfigurePolymorphic(maps, transitioned_maps, handlers); |
| |
| vector_set_ = true; |
| OnTypeFeedbackChanged(isolate(), get_host()); |
| } |
| |
| |
| MaybeHandle<Object> LoadIC::Load(Handle<Object> object, Handle<Name> name) { |
| // If the object is undefined or null it's illegal to try to get any |
| // of its properties; throw a TypeError in that case. |
| if (object->IsUndefined(isolate()) || object->IsNull(isolate())) { |
| return TypeError(MessageTemplate::kNonObjectPropertyLoad, object, name); |
| } |
| |
| bool use_ic = MigrateDeprecated(object) ? false : FLAG_use_ic; |
| |
| if (state() != UNINITIALIZED) { |
| JSObject::MakePrototypesFast(object, kStartAtReceiver, isolate()); |
| update_receiver_map(object); |
| } |
| // Named lookup in the object. |
| LookupIterator it(object, name); |
| LookupForRead(&it); |
| |
| if (it.IsFound() || !ShouldThrowReferenceError()) { |
| // Update inline cache and stub cache. |
| if (use_ic) UpdateCaches(&it); |
| |
| // Get the property. |
| Handle<Object> result; |
| |
| ASSIGN_RETURN_ON_EXCEPTION(isolate(), result, Object::GetProperty(&it), |
| Object); |
| if (it.IsFound()) { |
| return result; |
| } else if (!ShouldThrowReferenceError()) { |
| LOG(isolate(), SuspectReadEvent(*name, *object)); |
| return result; |
| } |
| } |
| return ReferenceError(name); |
| } |
| |
| MaybeHandle<Object> LoadGlobalIC::Load(Handle<Name> name) { |
| Handle<JSGlobalObject> global = isolate()->global_object(); |
| |
| if (name->IsString()) { |
| // Look up in script context table. |
| Handle<String> str_name = Handle<String>::cast(name); |
| Handle<ScriptContextTable> script_contexts( |
| global->native_context()->script_context_table()); |
| |
| ScriptContextTable::LookupResult lookup_result; |
| if (ScriptContextTable::Lookup(script_contexts, str_name, &lookup_result)) { |
| Handle<Object> result = |
| FixedArray::get(*ScriptContextTable::GetContext( |
| script_contexts, lookup_result.context_index), |
| lookup_result.slot_index, isolate()); |
| if (result->IsTheHole(isolate())) { |
| // Do not install stubs and stay pre-monomorphic for |
| // uninitialized accesses. |
| return ReferenceError(name); |
| } |
| |
| if (FLAG_use_ic && LoadScriptContextFieldStub::Accepted(&lookup_result)) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadScriptContextFieldStub); |
| LoadScriptContextFieldStub stub(isolate(), &lookup_result); |
| PatchCache(name, stub.GetCode()); |
| TRACE_IC("LoadGlobalIC", name); |
| } |
| return result; |
| } |
| } |
| return LoadIC::Load(global, name); |
| } |
| |
| static bool AddOneReceiverMapIfMissing(MapHandleList* receiver_maps, |
| Handle<Map> new_receiver_map) { |
| DCHECK(!new_receiver_map.is_null()); |
| for (int current = 0; current < receiver_maps->length(); ++current) { |
| if (!receiver_maps->at(current).is_null() && |
| receiver_maps->at(current).is_identical_to(new_receiver_map)) { |
| return false; |
| } |
| } |
| receiver_maps->Add(new_receiver_map); |
| return true; |
| } |
| |
| |
| bool IC::UpdatePolymorphicIC(Handle<Name> name, Handle<Code> code) { |
| if (!code->is_handler()) return false; |
| if (is_keyed() && state() != RECOMPUTE_HANDLER) return false; |
| Handle<Map> map = receiver_map(); |
| MapHandleList maps; |
| CodeHandleList handlers; |
| |
| TargetMaps(&maps); |
| int number_of_maps = maps.length(); |
| int deprecated_maps = 0; |
| int handler_to_overwrite = -1; |
| |
| for (int i = 0; i < number_of_maps; i++) { |
| Handle<Map> current_map = maps.at(i); |
| if (current_map->is_deprecated()) { |
| // Filter out deprecated maps to ensure their instances get migrated. |
| ++deprecated_maps; |
| } else if (map.is_identical_to(current_map)) { |
| // If the receiver type is already in the polymorphic IC, this indicates |
| // there was a prototoype chain failure. In that case, just overwrite the |
| // handler. |
| handler_to_overwrite = i; |
| } else if (handler_to_overwrite == -1 && |
| IsTransitionOfMonomorphicTarget(*current_map, *map)) { |
| handler_to_overwrite = i; |
| } |
| } |
| |
| int number_of_valid_maps = |
| number_of_maps - deprecated_maps - (handler_to_overwrite != -1); |
| |
| if (number_of_valid_maps >= 4) return false; |
| if (number_of_maps == 0 && state() != MONOMORPHIC && state() != POLYMORPHIC) { |
| return false; |
| } |
| DCHECK(UseVector()); |
| if (!nexus()->FindHandlers(&handlers, maps.length())) return false; |
| |
| number_of_valid_maps++; |
| if (number_of_valid_maps > 1 && is_keyed()) return false; |
| Handle<Code> ic; |
| if (number_of_valid_maps == 1) { |
| ConfigureVectorState(name, receiver_map(), code); |
| } else { |
| if (handler_to_overwrite >= 0) { |
| handlers.Set(handler_to_overwrite, code); |
| if (!map.is_identical_to(maps.at(handler_to_overwrite))) { |
| maps.Set(handler_to_overwrite, map); |
| } |
| } else { |
| maps.Add(map); |
| handlers.Add(code); |
| } |
| |
| ConfigureVectorState(name, &maps, &handlers); |
| } |
| |
| return true; |
| } |
| |
| |
| void IC::UpdateMonomorphicIC(Handle<Code> handler, Handle<Name> name) { |
| DCHECK(handler->is_handler()); |
| ConfigureVectorState(name, receiver_map(), handler); |
| } |
| |
| |
| void IC::CopyICToMegamorphicCache(Handle<Name> name) { |
| MapHandleList maps; |
| CodeHandleList handlers; |
| TargetMaps(&maps); |
| if (!nexus()->FindHandlers(&handlers, maps.length())) return; |
| for (int i = 0; i < maps.length(); i++) { |
| UpdateMegamorphicCache(*maps.at(i), *name, *handlers.at(i)); |
| } |
| } |
| |
| |
| bool IC::IsTransitionOfMonomorphicTarget(Map* source_map, Map* target_map) { |
| if (source_map == NULL) return true; |
| if (target_map == NULL) return false; |
| ElementsKind target_elements_kind = target_map->elements_kind(); |
| bool more_general_transition = IsMoreGeneralElementsKindTransition( |
| source_map->elements_kind(), target_elements_kind); |
| Map* transitioned_map = nullptr; |
| if (more_general_transition) { |
| MapHandleList map_list; |
| map_list.Add(handle(target_map)); |
| transitioned_map = source_map->FindElementsKindTransitionedMap(&map_list); |
| } |
| return transitioned_map == target_map; |
| } |
| |
| |
| void IC::PatchCache(Handle<Name> name, Handle<Code> code) { |
| switch (state()) { |
| case UNINITIALIZED: |
| case PREMONOMORPHIC: |
| UpdateMonomorphicIC(code, name); |
| break; |
| case RECOMPUTE_HANDLER: |
| case MONOMORPHIC: |
| if (kind() == Code::LOAD_GLOBAL_IC) { |
| UpdateMonomorphicIC(code, name); |
| break; |
| } |
| // Fall through. |
| case POLYMORPHIC: |
| if (!is_keyed() || state() == RECOMPUTE_HANDLER) { |
| if (UpdatePolymorphicIC(name, code)) break; |
| // For keyed stubs, we can't know whether old handlers were for the |
| // same key. |
| CopyICToMegamorphicCache(name); |
| } |
| DCHECK(UseVector()); |
| ConfigureVectorState(MEGAMORPHIC, name); |
| // Fall through. |
| case MEGAMORPHIC: |
| UpdateMegamorphicCache(*receiver_map(), *name, *code); |
| // Indicate that we've handled this case. |
| DCHECK(UseVector()); |
| vector_set_ = true; |
| break; |
| case GENERIC: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| |
| Handle<Code> LoadIC::initialize_stub_in_optimized_code(Isolate* isolate) { |
| if (FLAG_tf_load_ic_stub) { |
| return LoadICTFStub(isolate).GetCode(); |
| } |
| return LoadICStub(isolate).GetCode(); |
| } |
| |
| Handle<Code> LoadGlobalIC::initialize_stub_in_optimized_code( |
| Isolate* isolate, ExtraICState extra_state) { |
| return LoadGlobalICStub(isolate, LoadGlobalICState(extra_state)).GetCode(); |
| } |
| |
| Handle<Code> KeyedLoadIC::initialize_stub_in_optimized_code( |
| Isolate* isolate, ExtraICState extra_state) { |
| // TODO(ishell): remove extra_ic_state |
| return KeyedLoadICStub(isolate).GetCode(); |
| } |
| |
| Handle<Code> KeyedStoreIC::initialize_stub_in_optimized_code( |
| Isolate* isolate, LanguageMode language_mode) { |
| StoreICState state = StoreICState(language_mode); |
| return VectorKeyedStoreICStub(isolate, state).GetCode(); |
| } |
| |
| |
| Handle<Code> KeyedStoreIC::ChooseMegamorphicStub(Isolate* isolate, |
| ExtraICState extra_state) { |
| LanguageMode mode = StoreICState::GetLanguageMode(extra_state); |
| return is_strict(mode) |
| ? isolate->builtins()->KeyedStoreIC_Megamorphic_Strict() |
| : isolate->builtins()->KeyedStoreIC_Megamorphic(); |
| } |
| |
| |
| Handle<Code> LoadIC::SimpleFieldLoad(FieldIndex index) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadFieldStub); |
| LoadFieldStub stub(isolate(), index); |
| return stub.GetCode(); |
| } |
| |
| |
| bool IsCompatibleReceiver(LookupIterator* lookup, Handle<Map> receiver_map) { |
| DCHECK(lookup->state() == LookupIterator::ACCESSOR); |
| Isolate* isolate = lookup->isolate(); |
| Handle<Object> accessors = lookup->GetAccessors(); |
| if (accessors->IsAccessorInfo()) { |
| Handle<AccessorInfo> info = Handle<AccessorInfo>::cast(accessors); |
| if (info->getter() != NULL && |
| !AccessorInfo::IsCompatibleReceiverMap(isolate, info, receiver_map)) { |
| return false; |
| } |
| } else if (accessors->IsAccessorPair()) { |
| Handle<Object> getter(Handle<AccessorPair>::cast(accessors)->getter(), |
| isolate); |
| if (!getter->IsJSFunction() && !getter->IsFunctionTemplateInfo()) { |
| return false; |
| } |
| Handle<JSObject> holder = lookup->GetHolder<JSObject>(); |
| Handle<Object> receiver = lookup->GetReceiver(); |
| if (holder->HasFastProperties()) { |
| if (getter->IsJSFunction()) { |
| Handle<JSFunction> function = Handle<JSFunction>::cast(getter); |
| if (!receiver->IsJSObject() && !function->shared()->IsBuiltin() && |
| is_sloppy(function->shared()->language_mode())) { |
| // Calling sloppy non-builtins with a value as the receiver |
| // requires boxing. |
| return false; |
| } |
| } |
| CallOptimization call_optimization(getter); |
| if (call_optimization.is_simple_api_call() && |
| !call_optimization.IsCompatibleReceiverMap(receiver_map, holder)) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| |
| void LoadIC::UpdateCaches(LookupIterator* lookup) { |
| if (state() == UNINITIALIZED && kind() != Code::LOAD_GLOBAL_IC) { |
| // This is the first time we execute this inline cache. Set the target to |
| // the pre monomorphic stub to delay setting the monomorphic state. |
| ConfigureVectorState(PREMONOMORPHIC, Handle<Object>()); |
| TRACE_IC("LoadIC", lookup->name()); |
| return; |
| } |
| |
| Handle<Code> code; |
| if (lookup->state() == LookupIterator::JSPROXY || |
| lookup->state() == LookupIterator::ACCESS_CHECK) { |
| code = slow_stub(); |
| } else if (!lookup->IsFound()) { |
| if (kind() == Code::LOAD_IC || kind() == Code::LOAD_GLOBAL_IC) { |
| code = NamedLoadHandlerCompiler::ComputeLoadNonexistent(lookup->name(), |
| receiver_map()); |
| // TODO(jkummerow/verwaest): Introduce a builtin that handles this case. |
| if (code.is_null()) code = slow_stub(); |
| } else { |
| code = slow_stub(); |
| } |
| } else { |
| if (kind() == Code::LOAD_GLOBAL_IC && |
| lookup->state() == LookupIterator::DATA && |
| lookup->GetHolder<Object>()->IsJSGlobalObject()) { |
| #if DEBUG |
| Handle<Object> holder = lookup->GetHolder<Object>(); |
| Handle<Object> receiver = lookup->GetReceiver(); |
| DCHECK_EQ(*receiver, *holder); |
| #endif |
| // Now update the cell in the feedback vector. |
| LoadGlobalICNexus* nexus = casted_nexus<LoadGlobalICNexus>(); |
| nexus->ConfigurePropertyCellMode(lookup->GetPropertyCell()); |
| TRACE_IC("LoadGlobalIC", lookup->name()); |
| return; |
| } else if (lookup->state() == LookupIterator::ACCESSOR) { |
| if (!IsCompatibleReceiver(lookup, receiver_map())) { |
| TRACE_GENERIC_IC(isolate(), "LoadIC", "incompatible receiver type"); |
| code = slow_stub(); |
| } |
| } else if (lookup->state() == LookupIterator::INTERCEPTOR) { |
| if (kind() == Code::LOAD_GLOBAL_IC) { |
| // The interceptor handler requires name but it is not passed explicitly |
| // to LoadGlobalIC and the LoadGlobalIC dispatcher also does not load |
| // it so we will just use slow stub. |
| code = slow_stub(); |
| } else { |
| // Perform a lookup behind the interceptor. Copy the LookupIterator |
| // since the original iterator will be used to fetch the value. |
| LookupIterator it = *lookup; |
| it.Next(); |
| LookupForRead(&it); |
| if (it.state() == LookupIterator::ACCESSOR && |
| !IsCompatibleReceiver(&it, receiver_map())) { |
| TRACE_GENERIC_IC(isolate(), "LoadIC", "incompatible receiver type"); |
| code = slow_stub(); |
| } |
| } |
| } |
| if (code.is_null()) code = ComputeHandler(lookup); |
| } |
| |
| PatchCache(lookup->name(), code); |
| TRACE_IC("LoadIC", lookup->name()); |
| } |
| |
| |
| void IC::UpdateMegamorphicCache(Map* map, Name* name, Code* code) { |
| isolate()->stub_cache()->Set(name, map, code); |
| } |
| |
| |
| Handle<Code> IC::ComputeHandler(LookupIterator* lookup, Handle<Object> value) { |
| // Try to find a globally shared handler stub. |
| Handle<Code> code = GetMapIndependentHandler(lookup); |
| if (!code.is_null()) return code; |
| |
| // Otherwise check the map's handler cache for a map-specific handler, and |
| // compile one if the cache comes up empty. |
| bool receiver_is_holder = |
| lookup->GetReceiver().is_identical_to(lookup->GetHolder<JSObject>()); |
| CacheHolderFlag flag; |
| Handle<Map> stub_holder_map; |
| if (kind() == Code::LOAD_IC || kind() == Code::LOAD_GLOBAL_IC || |
| kind() == Code::KEYED_LOAD_IC) { |
| stub_holder_map = IC::GetHandlerCacheHolder( |
| receiver_map(), receiver_is_holder, isolate(), &flag); |
| } else { |
| DCHECK(kind() == Code::STORE_IC || kind() == Code::KEYED_STORE_IC); |
| // Store handlers cannot be cached on prototypes. |
| flag = kCacheOnReceiver; |
| stub_holder_map = receiver_map(); |
| } |
| |
| code = PropertyHandlerCompiler::Find(lookup->name(), stub_holder_map, kind(), |
| flag); |
| // Use the cached value if it exists, and if it is different from the |
| // handler that just missed. |
| if (!code.is_null()) { |
| Handle<Code> handler; |
| if (maybe_handler_.ToHandle(&handler)) { |
| if (!handler.is_identical_to(code)) { |
| TRACE_HANDLER_STATS(isolate(), IC_HandlerCacheHit); |
| return code; |
| } |
| } else { |
| // maybe_handler_ is only populated for MONOMORPHIC and POLYMORPHIC ICs. |
| // In MEGAMORPHIC case, check if the handler in the megamorphic stub |
| // cache (which just missed) is different from the cached handler. |
| if (state() == MEGAMORPHIC && lookup->GetReceiver()->IsHeapObject()) { |
| Map* map = Handle<HeapObject>::cast(lookup->GetReceiver())->map(); |
| Code* megamorphic_cached_code = |
| isolate()->stub_cache()->Get(*lookup->name(), map, code->flags()); |
| if (megamorphic_cached_code != *code) { |
| TRACE_HANDLER_STATS(isolate(), IC_HandlerCacheHit); |
| return code; |
| } |
| } else { |
| TRACE_HANDLER_STATS(isolate(), IC_HandlerCacheHit); |
| return code; |
| } |
| } |
| } |
| |
| code = CompileHandler(lookup, value, flag); |
| DCHECK(code->is_handler()); |
| DCHECK(Code::ExtractCacheHolderFromFlags(code->flags()) == flag); |
| Map::UpdateCodeCache(stub_holder_map, lookup->name(), code); |
| |
| return code; |
| } |
| |
| Handle<Code> LoadIC::GetMapIndependentHandler(LookupIterator* lookup) { |
| Handle<Object> receiver = lookup->GetReceiver(); |
| if (receiver->IsString() && |
| Name::Equals(isolate()->factory()->length_string(), lookup->name())) { |
| FieldIndex index = FieldIndex::ForInObjectOffset(String::kLengthOffset); |
| return SimpleFieldLoad(index); |
| } |
| |
| if (receiver->IsStringWrapper() && |
| Name::Equals(isolate()->factory()->length_string(), lookup->name())) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_StringLengthStub); |
| StringLengthStub string_length_stub(isolate()); |
| return string_length_stub.GetCode(); |
| } |
| |
| // Use specialized code for getting prototype of functions. |
| if (receiver->IsJSFunction() && |
| Name::Equals(isolate()->factory()->prototype_string(), lookup->name()) && |
| receiver->IsConstructor() && |
| !Handle<JSFunction>::cast(receiver) |
| ->map() |
| ->has_non_instance_prototype()) { |
| Handle<Code> stub; |
| TRACE_HANDLER_STATS(isolate(), LoadIC_FunctionPrototypeStub); |
| FunctionPrototypeStub function_prototype_stub(isolate()); |
| return function_prototype_stub.GetCode(); |
| } |
| |
| Handle<Map> map = receiver_map(); |
| Handle<JSObject> holder = lookup->GetHolder<JSObject>(); |
| bool receiver_is_holder = receiver.is_identical_to(holder); |
| switch (lookup->state()) { |
| case LookupIterator::INTERCEPTOR: |
| break; // Custom-compiled handler. |
| |
| case LookupIterator::ACCESSOR: { |
| // Use simple field loads for some well-known callback properties. |
| // The method will only return true for absolute truths based on the |
| // receiver maps. |
| int object_offset; |
| if (Accessors::IsJSObjectFieldAccessor(map, lookup->name(), |
| &object_offset)) { |
| FieldIndex index = FieldIndex::ForInObjectOffset(object_offset, *map); |
| return SimpleFieldLoad(index); |
| } |
| |
| if (IsCompatibleReceiver(lookup, map)) { |
| Handle<Object> accessors = lookup->GetAccessors(); |
| if (accessors->IsAccessorPair()) { |
| if (!holder->HasFastProperties()) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_SlowStub); |
| return slow_stub(); |
| } |
| // When debugging we need to go the slow path to flood the accessor. |
| if (GetSharedFunctionInfo()->HasDebugInfo()) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_SlowStub); |
| return slow_stub(); |
| } |
| break; // Custom-compiled handler. |
| } else if (accessors->IsAccessorInfo()) { |
| Handle<AccessorInfo> info = Handle<AccessorInfo>::cast(accessors); |
| if (v8::ToCData<Address>(info->getter()) == nullptr) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_SlowStub); |
| return slow_stub(); |
| } |
| // Ruled out by IsCompatibleReceiver() above. |
| DCHECK(AccessorInfo::IsCompatibleReceiverMap(isolate(), info, map)); |
| if (!holder->HasFastProperties()) return slow_stub(); |
| if (receiver_is_holder) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadApiGetterStub); |
| int index = lookup->GetAccessorIndex(); |
| LoadApiGetterStub stub(isolate(), true, index); |
| return stub.GetCode(); |
| } |
| if (info->is_sloppy() && !receiver->IsJSReceiver()) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_SlowStub); |
| return slow_stub(); |
| } |
| break; // Custom-compiled handler. |
| } |
| } |
| TRACE_HANDLER_STATS(isolate(), LoadIC_SlowStub); |
| return slow_stub(); |
| } |
| |
| case LookupIterator::DATA: { |
| if (lookup->is_dictionary_holder()) { |
| if (kind() != Code::LOAD_IC && kind() != Code::LOAD_GLOBAL_IC) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_SlowStub); |
| return slow_stub(); |
| } |
| if (holder->IsJSGlobalObject()) { |
| break; // Custom-compiled handler. |
| } |
| // There is only one shared stub for loading normalized |
| // properties. It does not traverse the prototype chain, so the |
| // property must be found in the object for the stub to be |
| // applicable. |
| if (!receiver_is_holder) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_SlowStub); |
| return slow_stub(); |
| } |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadNormal); |
| return isolate()->builtins()->LoadIC_Normal(); |
| } |
| |
| // -------------- Fields -------------- |
| if (lookup->property_details().type() == DATA) { |
| FieldIndex field = lookup->GetFieldIndex(); |
| if (receiver_is_holder) { |
| return SimpleFieldLoad(field); |
| } |
| break; // Custom-compiled handler. |
| } |
| |
| // -------------- Constant properties -------------- |
| DCHECK(lookup->property_details().type() == DATA_CONSTANT); |
| if (receiver_is_holder) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadConstantStub); |
| LoadConstantStub stub(isolate(), lookup->GetConstantIndex()); |
| return stub.GetCode(); |
| } |
| break; // Custom-compiled handler. |
| } |
| |
| case LookupIterator::INTEGER_INDEXED_EXOTIC: |
| TRACE_HANDLER_STATS(isolate(), LoadIC_SlowStub); |
| return slow_stub(); |
| case LookupIterator::ACCESS_CHECK: |
| case LookupIterator::JSPROXY: |
| case LookupIterator::NOT_FOUND: |
| case LookupIterator::TRANSITION: |
| UNREACHABLE(); |
| } |
| |
| return Handle<Code>::null(); |
| } |
| |
| Handle<Code> LoadIC::CompileHandler(LookupIterator* lookup, |
| Handle<Object> unused, |
| CacheHolderFlag cache_holder) { |
| Handle<JSObject> holder = lookup->GetHolder<JSObject>(); |
| #ifdef DEBUG |
| // Only used by DCHECKs below. |
| Handle<Object> receiver = lookup->GetReceiver(); |
| bool receiver_is_holder = receiver.is_identical_to(holder); |
| #endif |
| // Non-map-specific handler stubs have already been selected. |
| DCHECK(!receiver->IsString() || |
| !Name::Equals(isolate()->factory()->length_string(), lookup->name())); |
| DCHECK(!receiver->IsStringWrapper() || |
| !Name::Equals(isolate()->factory()->length_string(), lookup->name())); |
| |
| DCHECK(!( |
| receiver->IsJSFunction() && |
| Name::Equals(isolate()->factory()->prototype_string(), lookup->name()) && |
| receiver->IsConstructor() && |
| !Handle<JSFunction>::cast(receiver) |
| ->map() |
| ->has_non_instance_prototype())); |
| |
| Handle<Map> map = receiver_map(); |
| switch (lookup->state()) { |
| case LookupIterator::INTERCEPTOR: { |
| DCHECK(!holder->GetNamedInterceptor()->getter()->IsUndefined(isolate())); |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadInterceptor); |
| NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder); |
| // Perform a lookup behind the interceptor. Copy the LookupIterator since |
| // the original iterator will be used to fetch the value. |
| LookupIterator it = *lookup; |
| it.Next(); |
| LookupForRead(&it); |
| return compiler.CompileLoadInterceptor(&it); |
| } |
| |
| case LookupIterator::ACCESSOR: { |
| #ifdef DEBUG |
| int object_offset; |
| DCHECK(!Accessors::IsJSObjectFieldAccessor(map, lookup->name(), |
| &object_offset)); |
| #endif |
| |
| DCHECK(IsCompatibleReceiver(lookup, map)); |
| Handle<Object> accessors = lookup->GetAccessors(); |
| if (accessors->IsAccessorPair()) { |
| DCHECK(holder->HasFastProperties()); |
| DCHECK(!GetSharedFunctionInfo()->HasDebugInfo()); |
| Handle<Object> getter(Handle<AccessorPair>::cast(accessors)->getter(), |
| isolate()); |
| CallOptimization call_optimization(getter); |
| NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder); |
| if (call_optimization.is_simple_api_call()) { |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadCallback); |
| int index = lookup->GetAccessorIndex(); |
| Handle<Code> code = compiler.CompileLoadCallback( |
| lookup->name(), call_optimization, index); |
| return code; |
| } |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadViaGetter); |
| int expected_arguments = Handle<JSFunction>::cast(getter) |
| ->shared() |
| ->internal_formal_parameter_count(); |
| return compiler.CompileLoadViaGetter( |
| lookup->name(), lookup->GetAccessorIndex(), expected_arguments); |
| } else { |
| DCHECK(accessors->IsAccessorInfo()); |
| Handle<AccessorInfo> info = Handle<AccessorInfo>::cast(accessors); |
| DCHECK(v8::ToCData<Address>(info->getter()) != nullptr); |
| DCHECK(AccessorInfo::IsCompatibleReceiverMap(isolate(), info, map)); |
| DCHECK(holder->HasFastProperties()); |
| DCHECK(!receiver_is_holder); |
| DCHECK(!info->is_sloppy() || receiver->IsJSReceiver()); |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadCallback); |
| NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder); |
| Handle<Code> code = compiler.CompileLoadCallback(lookup->name(), info); |
| return code; |
| } |
| UNREACHABLE(); |
| } |
| |
| case LookupIterator::DATA: { |
| if (lookup->is_dictionary_holder()) { |
| DCHECK(kind() == Code::LOAD_IC || kind() == Code::LOAD_GLOBAL_IC); |
| DCHECK(holder->IsJSGlobalObject()); |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadGlobal); |
| NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder); |
| Handle<PropertyCell> cell = lookup->GetPropertyCell(); |
| Handle<Code> code = compiler.CompileLoadGlobal( |
| cell, lookup->name(), lookup->IsConfigurable()); |
| return code; |
| } |
| |
| // -------------- Fields -------------- |
| if (lookup->property_details().type() == DATA) { |
| FieldIndex field = lookup->GetFieldIndex(); |
| DCHECK(!receiver_is_holder); |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadField); |
| NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder); |
| return compiler.CompileLoadField(lookup->name(), field); |
| } |
| |
| // -------------- Constant properties -------------- |
| DCHECK(lookup->property_details().type() == DATA_CONSTANT); |
| DCHECK(!receiver_is_holder); |
| TRACE_HANDLER_STATS(isolate(), LoadIC_LoadConstant); |
| NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder); |
| return compiler.CompileLoadConstant(lookup->name(), |
| lookup->GetConstantIndex()); |
| } |
| |
| case LookupIterator::INTEGER_INDEXED_EXOTIC: |
| case LookupIterator::ACCESS_CHECK: |
| case LookupIterator::JSPROXY: |
| case LookupIterator::NOT_FOUND: |
| case LookupIterator::TRANSITION: |
| UNREACHABLE(); |
| } |
| UNREACHABLE(); |
| return slow_stub(); |
| } |
| |
| |
| static Handle<Object> TryConvertKey(Handle<Object> key, Isolate* isolate) { |
| // This helper implements a few common fast cases for converting |
| // non-smi keys of keyed loads/stores to a smi or a string. |
| if (key->IsHeapNumber()) { |
| double value = Handle<HeapNumber>::cast(key)->value(); |
| if (std::isnan(value)) { |
| key = isolate->factory()->nan_string(); |
| } else { |
| int int_value = FastD2I(value); |
| if (value == int_value && Smi::IsValid(int_value)) { |
| key = handle(Smi::FromInt(int_value), isolate); |
| } |
| } |
| } else if (key->IsUndefined(isolate)) { |
| key = isolate->factory()->undefined_string(); |
| } |
| return key; |
| } |
| |
| void KeyedLoadIC::UpdateLoadElement(Handle<HeapObject> receiver) { |
| Handle<Map> receiver_map(receiver->map(), isolate()); |
| DCHECK(receiver_map->instance_type() != JS_VALUE_TYPE && |
| receiver_map->instance_type() != JS_PROXY_TYPE); // Checked by caller. |
| MapHandleList target_receiver_maps; |
| TargetMaps(&target_receiver_maps); |
| |
| if (target_receiver_maps.length() == 0) { |
| Handle<Code> handler = |
| PropertyICCompiler::ComputeKeyedLoadMonomorphicHandler( |
| receiver_map, extra_ic_state()); |
| return ConfigureVectorState(Handle<Name>(), receiver_map, handler); |
| } |
| |
| for (int i = 0; i < target_receiver_maps.length(); i++) { |
| Handle<Map> map = target_receiver_maps.at(i); |
| if (map.is_null()) continue; |
| if (map->instance_type() == JS_VALUE_TYPE) { |
| TRACE_GENERIC_IC(isolate(), "KeyedLoadIC", "JSValue"); |
| return; |
| } |
| if (map->instance_type() == JS_PROXY_TYPE) { |
| TRACE_GENERIC_IC(isolate(), "KeyedLoadIC", "JSProxy"); |
| return; |
| } |
| } |
| |
| // The first time a receiver is seen that is a transitioned version of the |
| // previous monomorphic receiver type, assume the new ElementsKind is the |
| // monomorphic type. This benefits global arrays that only transition |
| // once, and all call sites accessing them are faster if they remain |
| // monomorphic. If this optimistic assumption is not true, the IC will |
| // miss again and it will become polymorphic and support both the |
| // untransitioned and transitioned maps. |
| if (state() == MONOMORPHIC && !receiver->IsString() && |
| IsMoreGeneralElementsKindTransition( |
| target_receiver_maps.at(0)->elements_kind(), |
| Handle<JSObject>::cast(receiver)->GetElementsKind())) { |
| Handle<Code> handler = |
| PropertyICCompiler::ComputeKeyedLoadMonomorphicHandler( |
| receiver_map, extra_ic_state()); |
| return ConfigureVectorState(Handle<Name>(), receiver_map, handler); |
| } |
| |
| DCHECK(state() != GENERIC); |
| |
| // Determine the list of receiver maps that this call site has seen, |
| // adding the map that was just encountered. |
| if (!AddOneReceiverMapIfMissing(&target_receiver_maps, receiver_map)) { |
| // If the miss wasn't due to an unseen map, a polymorphic stub |
| // won't help, use the generic stub. |
| TRACE_GENERIC_IC(isolate(), "KeyedLoadIC", "same map added twice"); |
| return; |
| } |
| |
| // If the maximum number of receiver maps has been exceeded, use the generic |
| // version of the IC. |
| if (target_receiver_maps.length() > kMaxKeyedPolymorphism) { |
| TRACE_GENERIC_IC(isolate(), "KeyedLoadIC", "max polymorph exceeded"); |
| return; |
| } |
| |
| CodeHandleList handlers(target_receiver_maps.length()); |
| TRACE_HANDLER_STATS(isolate(), KeyedLoadIC_PolymorphicElement); |
| ElementHandlerCompiler compiler(isolate()); |
| compiler.CompileElementHandlers(&target_receiver_maps, &handlers); |
| ConfigureVectorState(Handle<Name>(), &target_receiver_maps, &handlers); |
| } |
| |
| |
| MaybeHandle<Object> KeyedLoadIC::Load(Handle<Object> object, |
| Handle<Object> key) { |
| if (MigrateDeprecated(object)) { |
| Handle<Object> result; |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate(), result, Runtime::GetObjectProperty(isolate(), object, key), |
| Object); |
| return result; |
| } |
| |
| Handle<Object> load_handle; |
| |
| // Check for non-string values that can be converted into an |
| // internalized string directly or is representable as a smi. |
| key = TryConvertKey(key, isolate()); |
| |
| uint32_t index; |
| if ((key->IsInternalizedString() && |
| !String::cast(*key)->AsArrayIndex(&index)) || |
| key->IsSymbol()) { |
| ASSIGN_RETURN_ON_EXCEPTION(isolate(), load_handle, |
| LoadIC::Load(object, Handle<Name>::cast(key)), |
| Object); |
| } else if (FLAG_use_ic && !object->IsAccessCheckNeeded() && |
| !object->IsJSValue()) { |
| if (object->IsJSObject() || (object->IsString() && key->IsNumber())) { |
| Handle<HeapObject> receiver = Handle<HeapObject>::cast(object); |
| if (object->IsString() || key->IsSmi()) UpdateLoadElement(receiver); |
| } |
| } |
| |
| if (!is_vector_set()) { |
| ConfigureVectorState(MEGAMORPHIC, key); |
| TRACE_GENERIC_IC(isolate(), "KeyedLoadIC", "set generic"); |
| } |
| TRACE_IC("LoadIC", key); |
| |
| if (!load_handle.is_null()) return load_handle; |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate(), result, |
| Runtime::GetObjectProperty(isolate(), object, key), |
| Object); |
| return result; |
| } |
| |
| |
| bool StoreIC::LookupForWrite(LookupIterator* it, Handle<Object> value, |
| JSReceiver::StoreFromKeyed store_mode) { |
| // Disable ICs for non-JSObjects for now. |
| Handle<Object> object = it->GetReceiver(); |
| if (!object->IsJSObject()) return false; |
| Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| DCHECK(!receiver->map()->is_deprecated()); |
| |
| for (; it->IsFound(); it->Next()) { |
| switch (it->state()) { |
| case LookupIterator::NOT_FOUND: |
| case LookupIterator::TRANSITION: |
| UNREACHABLE(); |
| case LookupIterator::JSPROXY: |
| return false; |
| case LookupIterator::INTERCEPTOR: { |
| Handle<JSObject> holder = it->GetHolder<JSObject>(); |
| InterceptorInfo* info = holder->GetNamedInterceptor(); |
| if (it->HolderIsReceiverOrHiddenPrototype()) { |
| return !info->non_masking() && receiver.is_identical_to(holder) && |
| !info->setter()->IsUndefined(it->isolate()); |
| } else if (!info->getter()->IsUndefined(it->isolate()) || |
| !info->query()->IsUndefined(it->isolate())) { |
| return false; |
| } |
| break; |
| } |
| case LookupIterator::ACCESS_CHECK: |
| if (it->GetHolder<JSObject>()->IsAccessCheckNeeded()) return false; |
| break; |
| case LookupIterator::ACCESSOR: |
| return !it->IsReadOnly(); |
| case LookupIterator::INTEGER_INDEXED_EXOTIC: |
| return false; |
| case LookupIterator::DATA: { |
| if (it->IsReadOnly()) return false; |
| Handle<JSObject> holder = it->GetHolder<JSObject>(); |
| if (receiver.is_identical_to(holder)) { |
| it->PrepareForDataProperty(value); |
| // The previous receiver map might just have been deprecated, |
| // so reload it. |
| update_receiver_map(receiver); |
| return true; |
| } |
| |
| // Receiver != holder. |
| if (receiver->IsJSGlobalProxy()) { |
| PrototypeIterator iter(it->isolate(), receiver); |
| return it->GetHolder<Object>().is_identical_to( |
| PrototypeIterator::GetCurrent(iter)); |
| } |
| |
| if (it->HolderIsReceiverOrHiddenPrototype()) return false; |
| |
| if (it->ExtendingNonExtensible(receiver)) return false; |
| it->PrepareTransitionToDataProperty(receiver, value, NONE, store_mode); |
| return it->IsCacheableTransition(); |
| } |
| } |
| } |
| |
| receiver = it->GetStoreTarget(); |
| if (it->ExtendingNonExtensible(receiver)) return false; |
| it->PrepareTransitionToDataProperty(receiver, value, NONE, store_mode); |
| return it->IsCacheableTransition(); |
| } |
| |
| |
| MaybeHandle<Object> StoreIC::Store(Handle<Object> object, Handle<Name> name, |
| Handle<Object> value, |
| JSReceiver::StoreFromKeyed store_mode) { |
| if (object->IsJSGlobalObject() && name->IsString()) { |
| // Look up in script context table. |
| Handle<String> str_name = Handle<String>::cast(name); |
| Handle<JSGlobalObject> global = Handle<JSGlobalObject>::cast(object); |
| Handle<ScriptContextTable> script_contexts( |
| global->native_context()->script_context_table()); |
| |
| ScriptContextTable::LookupResult lookup_result; |
| if (ScriptContextTable::Lookup(script_contexts, str_name, &lookup_result)) { |
| Handle<Context> script_context = ScriptContextTable::GetContext( |
| script_contexts, lookup_result.context_index); |
| if (lookup_result.mode == CONST) { |
| return TypeError(MessageTemplate::kConstAssign, object, name); |
| } |
| |
| Handle<Object> previous_value = |
| FixedArray::get(*script_context, lookup_result.slot_index, isolate()); |
| |
| if (previous_value->IsTheHole(isolate())) { |
| // Do not install stubs and stay pre-monomorphic for |
| // uninitialized accesses. |
| return ReferenceError(name); |
| } |
| |
| if (FLAG_use_ic && |
| StoreScriptContextFieldStub::Accepted(&lookup_result)) { |
| TRACE_HANDLER_STATS(isolate(), StoreIC_StoreScriptContextFieldStub); |
| StoreScriptContextFieldStub stub(isolate(), &lookup_result); |
| PatchCache(name, stub.GetCode()); |
| } |
| |
| script_context->set(lookup_result.slot_index, *value); |
| return value; |
| } |
| } |
| |
| // TODO(verwaest): Let SetProperty do the migration, since storing a property |
| // might deprecate the current map again, if value does not fit. |
| if (MigrateDeprecated(object) || object->IsJSProxy()) { |
| Handle<Object> result; |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate(), result, |
| Object::SetProperty(object, name, value, language_mode()), Object); |
| return result; |
| } |
| |
| // If the object is undefined or null it's illegal to try to set any |
| // properties on it; throw a TypeError in that case. |
| if (object->IsUndefined(isolate()) || object->IsNull(isolate())) { |
| return TypeError(MessageTemplate::kNonObjectPropertyStore, object, name); |
| } |
| |
| if (state() != UNINITIALIZED) { |
| JSObject::MakePrototypesFast(object, kStartAtPrototype, isolate()); |
| } |
| LookupIterator it(object, name); |
| if (FLAG_use_ic) UpdateCaches(&it, value, store_mode); |
| |
| MAYBE_RETURN_NULL( |
| Object::SetProperty(&it, value, language_mode(), store_mode)); |
| return value; |
| } |
| |
| Handle<Code> CallIC::initialize_stub_in_optimized_code( |
| Isolate* isolate, int argc, ConvertReceiverMode mode, |
| TailCallMode tail_call_mode) { |
| CallICStub stub(isolate, CallICState(argc, mode, tail_call_mode)); |
| Handle<Code> code = stub.GetCode(); |
| return code; |
| } |
| |
| Handle<Code> StoreIC::initialize_stub_in_optimized_code( |
| Isolate* isolate, LanguageMode language_mode) { |
| VectorStoreICStub stub(isolate, StoreICState(language_mode)); |
| return stub.GetCode(); |
| } |
| |
| void StoreIC::UpdateCaches(LookupIterator* lookup, Handle<Object> value, |
| JSReceiver::StoreFromKeyed store_mode) { |
| if (state() == UNINITIALIZED) { |
| // This is the first time we execute this inline cache. Set the target to |
| // the pre monomorphic stub to delay setting the monomorphic state. |
| ConfigureVectorState(PREMONOMORPHIC, Handle<Object>()); |
| TRACE_IC("StoreIC", lookup->name()); |
| return; |
| } |
| |
| bool use_ic = LookupForWrite(lookup, value, store_mode); |
| if (!use_ic) { |
| TRACE_GENERIC_IC(isolate(), "StoreIC", "LookupForWrite said 'false'"); |
| } |
| Handle<Code> code = use_ic ? ComputeHandler(lookup, value) : slow_stub(); |
| |
| PatchCache(lookup->name(), code); |
| TRACE_IC("StoreIC", lookup->name()); |
| } |
| |
| |
| static Handle<Code> PropertyCellStoreHandler( |
| Isolate* isolate, Handle<JSObject> receiver, Handle<JSGlobalObject> holder, |
| Handle<Name> name, Handle<PropertyCell> cell, PropertyCellType type) { |
| auto constant_type = Nothing<PropertyCellConstantType>(); |
| if (type == PropertyCellType::kConstantType) { |
| constant_type = Just(cell->GetConstantType()); |
| } |
| StoreGlobalStub stub(isolate, type, constant_type, |
| receiver->IsJSGlobalProxy()); |
| auto code = stub.GetCodeCopyFromTemplate(holder, cell); |
| // TODO(verwaest): Move caching of these NORMAL stubs outside as well. |
| HeapObject::UpdateMapCodeCache(receiver, name, code); |
| return code; |
| } |
| |
| Handle<Code> StoreIC::GetMapIndependentHandler(LookupIterator* lookup) { |
| DCHECK_NE(LookupIterator::JSPROXY, lookup->state()); |
| |
| // This is currently guaranteed by checks in StoreIC::Store. |
| Handle<JSObject> receiver = Handle<JSObject>::cast(lookup->GetReceiver()); |
| Handle<JSObject> holder = lookup->GetHolder<JSObject>(); |
| DCHECK(!receiver->IsAccessCheckNeeded() || lookup->name()->IsPrivate()); |
| |
| switch (lookup->state()) { |
| case LookupIterator::TRANSITION: { |
| auto store_target = lookup->GetStoreTarget(); |
| if (store_target->IsJSGlobalObject()) { |
| break; // Custom-compiled handler. |
| } |
| // Currently not handled by CompileStoreTransition. |
| if (!holder->HasFastProperties()) { |
| TRACE_GENERIC_IC(isolate(), "StoreIC", "transition from slow"); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_SlowStub); |
| return slow_stub(); |
| } |
| |
| DCHECK(lookup->IsCacheableTransition()); |
| break; // Custom-compiled handler. |
| } |
| |
| case LookupIterator::INTERCEPTOR: { |
| DCHECK(!holder->GetNamedInterceptor()->setter()->IsUndefined(isolate())); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_StoreInterceptorStub); |
| StoreInterceptorStub stub(isolate()); |
| return stub.GetCode(); |
| } |
| |
| case LookupIterator::ACCESSOR: { |
| if (!holder->HasFastProperties()) { |
| TRACE_GENERIC_IC(isolate(), "StoreIC", "accessor on slow map"); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_SlowStub); |
| return slow_stub(); |
| } |
| Handle<Object> accessors = lookup->GetAccessors(); |
| if (accessors->IsAccessorInfo()) { |
| Handle<AccessorInfo> info = Handle<AccessorInfo>::cast(accessors); |
| if (v8::ToCData<Address>(info->setter()) == nullptr) { |
| TRACE_GENERIC_IC(isolate(), "StoreIC", "setter == nullptr"); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_SlowStub); |
| return slow_stub(); |
| } |
| if (AccessorInfo::cast(*accessors)->is_special_data_property() && |
| !lookup->HolderIsReceiverOrHiddenPrototype()) { |
| TRACE_GENERIC_IC(isolate(), "StoreIC", |
| "special data property in prototype chain"); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_SlowStub); |
| return slow_stub(); |
| } |
| if (!AccessorInfo::IsCompatibleReceiverMap(isolate(), info, |
| receiver_map())) { |
| TRACE_GENERIC_IC(isolate(), "StoreIC", "incompatible receiver type"); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_SlowStub); |
| return slow_stub(); |
| } |
| if (info->is_sloppy() && !receiver->IsJSReceiver()) { |
| TRACE_HANDLER_STATS(isolate(), StoreIC_SlowStub); |
| return slow_stub(); |
| } |
| break; // Custom-compiled handler. |
| } else if (accessors->IsAccessorPair()) { |
| Handle<Object> setter(Handle<AccessorPair>::cast(accessors)->setter(), |
| isolate()); |
| if (!setter->IsJSFunction() && !setter->IsFunctionTemplateInfo()) { |
| TRACE_GENERIC_IC(isolate(), "StoreIC", "setter not a function"); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_SlowStub); |
| return slow_stub(); |
| } |
| CallOptimization call_optimization(setter); |
| if (call_optimization.is_simple_api_call()) { |
| if (call_optimization.IsCompatibleReceiver(receiver, holder)) { |
| break; // Custom-compiled handler. |
| } |
| TRACE_GENERIC_IC(isolate(), "StoreIC", "incompatible receiver"); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_SlowStub); |
| return slow_stub(); |
| } |
| break; // Custom-compiled handler. |
| } |
| TRACE_HANDLER_STATS(isolate(), StoreIC_SlowStub); |
| return slow_stub(); |
| } |
| |
| case LookupIterator::DATA: { |
| if (lookup->is_dictionary_holder()) { |
| if (holder->IsJSGlobalObject()) { |
| break; // Custom-compiled handler. |
| } |
| TRACE_HANDLER_STATS(isolate(), StoreIC_StoreNormal); |
| DCHECK(holder.is_identical_to(receiver)); |
| return isolate()->builtins()->StoreIC_Normal(); |
| } |
| |
| // -------------- Fields -------------- |
| if (lookup->property_details().type() == DATA) { |
| bool use_stub = true; |
| if (lookup->representation().IsHeapObject()) { |
| // Only use a generic stub if no types need to be tracked. |
| Handle<FieldType> field_type = lookup->GetFieldType(); |
| use_stub = !field_type->IsClass(); |
| } |
| if (use_stub) { |
| TRACE_HANDLER_STATS(isolate(), StoreIC_StoreFieldStub); |
| StoreFieldStub stub(isolate(), lookup->GetFieldIndex(), |
| lookup->representation()); |
| return stub.GetCode(); |
| } |
| break; // Custom-compiled handler. |
| } |
| |
| // -------------- Constant properties -------------- |
| DCHECK(lookup->property_details().type() == DATA_CONSTANT); |
| TRACE_GENERIC_IC(isolate(), "StoreIC", "constant property"); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_SlowStub); |
| return slow_stub(); |
| } |
| |
| case LookupIterator::INTEGER_INDEXED_EXOTIC: |
| case LookupIterator::ACCESS_CHECK: |
| case LookupIterator::JSPROXY: |
| case LookupIterator::NOT_FOUND: |
| UNREACHABLE(); |
| } |
| return Handle<Code>::null(); |
| } |
| |
| Handle<Code> StoreIC::CompileHandler(LookupIterator* lookup, |
| Handle<Object> value, |
| CacheHolderFlag cache_holder) { |
| DCHECK_NE(LookupIterator::JSPROXY, lookup->state()); |
| |
| // This is currently guaranteed by checks in StoreIC::Store. |
| Handle<JSObject> receiver = Handle<JSObject>::cast(lookup->GetReceiver()); |
| Handle<JSObject> holder = lookup->GetHolder<JSObject>(); |
| DCHECK(!receiver->IsAccessCheckNeeded() || lookup->name()->IsPrivate()); |
| |
| switch (lookup->state()) { |
| case LookupIterator::TRANSITION: { |
| auto store_target = lookup->GetStoreTarget(); |
| if (store_target->IsJSGlobalObject()) { |
| // TODO(dcarney): this currently just deopts. Use the transition cell. |
| TRACE_HANDLER_STATS(isolate(), StoreIC_StoreGlobalTransition); |
| auto cell = isolate()->factory()->NewPropertyCell(); |
| cell->set_value(*value); |
| auto code = PropertyCellStoreHandler( |
| isolate(), store_target, Handle<JSGlobalObject>::cast(store_target), |
| lookup->name(), cell, PropertyCellType::kConstant); |
| cell->set_value(isolate()->heap()->the_hole_value()); |
| return code; |
| } |
| Handle<Map> transition = lookup->transition_map(); |
| // Currently not handled by CompileStoreTransition. |
| DCHECK(holder->HasFastProperties()); |
| |
| DCHECK(lookup->IsCacheableTransition()); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_StoreTransition); |
| NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder); |
| return compiler.CompileStoreTransition(transition, lookup->name()); |
| } |
| |
| case LookupIterator::INTERCEPTOR: |
| UNREACHABLE(); |
| |
| case LookupIterator::ACCESSOR: { |
| DCHECK(holder->HasFastProperties()); |
| Handle<Object> accessors = lookup->GetAccessors(); |
| if (accessors->IsAccessorInfo()) { |
| Handle<AccessorInfo> info = Handle<AccessorInfo>::cast(accessors); |
| DCHECK(v8::ToCData<Address>(info->setter()) != 0); |
| DCHECK(!AccessorInfo::cast(*accessors)->is_special_data_property() || |
| lookup->HolderIsReceiverOrHiddenPrototype()); |
| DCHECK(AccessorInfo::IsCompatibleReceiverMap(isolate(), info, |
| receiver_map())); |
| DCHECK(!info->is_sloppy() || receiver->IsJSReceiver()); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_StoreCallback); |
| NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder); |
| Handle<Code> code = compiler.CompileStoreCallback( |
| receiver, lookup->name(), info, language_mode()); |
| return code; |
| } else { |
| DCHECK(accessors->IsAccessorPair()); |
| Handle<Object> setter(Handle<AccessorPair>::cast(accessors)->setter(), |
| isolate()); |
| DCHECK(setter->IsJSFunction() || setter->IsFunctionTemplateInfo()); |
| CallOptimization call_optimization(setter); |
| NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder); |
| if (call_optimization.is_simple_api_call()) { |
| DCHECK(call_optimization.IsCompatibleReceiver(receiver, holder)); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_StoreCallback); |
| Handle<Code> code = compiler.CompileStoreCallback( |
| receiver, lookup->name(), call_optimization, |
| lookup->GetAccessorIndex()); |
| return code; |
| } |
| TRACE_HANDLER_STATS(isolate(), StoreIC_StoreViaSetter); |
| int expected_arguments = JSFunction::cast(*setter) |
| ->shared() |
| ->internal_formal_parameter_count(); |
| return compiler.CompileStoreViaSetter(receiver, lookup->name(), |
| lookup->GetAccessorIndex(), |
| expected_arguments); |
| } |
| } |
| |
| case LookupIterator::DATA: { |
| if (lookup->is_dictionary_holder()) { |
| DCHECK(holder->IsJSGlobalObject()); |
| TRACE_HANDLER_STATS(isolate(), StoreIC_StoreGlobal); |
| DCHECK(holder.is_identical_to(receiver) || |
| receiver->map()->prototype() == *holder); |
| auto cell = lookup->GetPropertyCell(); |
| auto updated_type = |
| PropertyCell::UpdatedType(cell, value, lookup->property_details()); |
| auto code = PropertyCellStoreHandler( |
| isolate(), receiver, Handle<JSGlobalObject>::cast(holder), |
| lookup->name(), cell, updated_type); |
| return code; |
| } |
| |
| // -------------- Fields -------------- |
| if (lookup->property_details().type() == DATA) { |
| #ifdef DEBUG |
| bool use_stub = true; |
| if (lookup->representation().IsHeapObject()) { |
| // Only use a generic stub if no types need to be tracked. |
| Handle<FieldType> field_type = lookup->GetFieldType(); |
| use_stub = !field_type->IsClass(); |
| } |
| DCHECK(!use_stub); |
| #endif |
| TRACE_HANDLER_STATS(isolate(), StoreIC_StoreField); |
| NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder); |
| return compiler.CompileStoreField(lookup); |
| } |
| |
| // -------------- Constant properties -------------- |
| DCHECK(lookup->property_details().type() == DATA_CONSTANT); |
| UNREACHABLE(); |
| } |
| |
| case LookupIterator::INTEGER_INDEXED_EXOTIC: |
| case LookupIterator::ACCESS_CHECK: |
| case LookupIterator::JSPROXY: |
| case LookupIterator::NOT_FOUND: |
| UNREACHABLE(); |
| } |
| UNREACHABLE(); |
| return slow_stub(); |
| } |
| |
| void KeyedStoreIC::UpdateStoreElement(Handle<Map> receiver_map, |
| KeyedAccessStoreMode store_mode) { |
| MapHandleList target_receiver_maps; |
| TargetMaps(&target_receiver_maps); |
| if (target_receiver_maps.length() == 0) { |
| Handle<Map> monomorphic_map = |
| ComputeTransitionedMap(receiver_map, store_mode); |
| store_mode = GetNonTransitioningStoreMode(store_mode); |
| Handle<Code> handler = |
| PropertyICCompiler::ComputeKeyedStoreMonomorphicHandler(monomorphic_map, |
| store_mode); |
| return ConfigureVectorState(Handle<Name>(), monomorphic_map, handler); |
| } |
| |
| for (int i = 0; i < target_receiver_maps.length(); i++) { |
| if (!target_receiver_maps.at(i).is_null() && |
| target_receiver_maps.at(i)->instance_type() == JS_VALUE_TYPE) { |
| TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "JSValue"); |
| return; |
| } |
| } |
| |
| // There are several special cases where an IC that is MONOMORPHIC can still |
| // transition to a different GetNonTransitioningStoreMode IC that handles a |
| // superset of the original IC. Handle those here if the receiver map hasn't |
| // changed or it has transitioned to a more general kind. |
| KeyedAccessStoreMode old_store_mode = GetKeyedAccessStoreMode(); |
| Handle<Map> previous_receiver_map = target_receiver_maps.at(0); |
| if (state() == MONOMORPHIC) { |
| Handle<Map> transitioned_receiver_map = receiver_map; |
| if (IsTransitionStoreMode(store_mode)) { |
| transitioned_receiver_map = |
| ComputeTransitionedMap(receiver_map, store_mode); |
| } |
| if ((receiver_map.is_identical_to(previous_receiver_map) && |
| IsTransitionStoreMode(store_mode)) || |
| IsTransitionOfMonomorphicTarget(*previous_receiver_map, |
| *transitioned_receiver_map)) { |
| // If the "old" and "new" maps are in the same elements map family, or |
| // if they at least come from the same origin for a transitioning store, |
| // stay MONOMORPHIC and use the map for the most generic ElementsKind. |
| store_mode = GetNonTransitioningStoreMode(store_mode); |
| Handle<Code> handler = |
| PropertyICCompiler::ComputeKeyedStoreMonomorphicHandler( |
| transitioned_receiver_map, store_mode); |
| ConfigureVectorState(Handle<Name>(), transitioned_receiver_map, handler); |
| return; |
| } |
| if (receiver_map.is_identical_to(previous_receiver_map) && |
| old_store_mode == STANDARD_STORE && |
| (store_mode == STORE_AND_GROW_NO_TRANSITION || |
| store_mode == STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS || |
| store_mode == STORE_NO_TRANSITION_HANDLE_COW)) { |
| // A "normal" IC that handles stores can switch to a version that can |
| // grow at the end of the array, handle OOB accesses or copy COW arrays |
| // and still stay MONOMORPHIC. |
| Handle<Code> handler = |
| PropertyICCompiler::ComputeKeyedStoreMonomorphicHandler(receiver_map, |
| store_mode); |
| return ConfigureVectorState(Handle<Name>(), receiver_map, handler); |
| } |
| } |
| |
| DCHECK(state() != GENERIC); |
| |
| bool map_added = |
| AddOneReceiverMapIfMissing(&target_receiver_maps, receiver_map); |
| |
| if (IsTransitionStoreMode(store_mode)) { |
| Handle<Map> transitioned_receiver_map = |
| ComputeTransitionedMap(receiver_map, store_mode); |
| map_added |= AddOneReceiverMapIfMissing(&target_receiver_maps, |
| transitioned_receiver_map); |
| } |
| |
| if (!map_added) { |
| // If the miss wasn't due to an unseen map, a polymorphic stub |
| // won't help, use the megamorphic stub which can handle everything. |
| TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "same map added twice"); |
| return; |
| } |
| |
| // If the maximum number of receiver maps has been exceeded, use the |
| // megamorphic version of the IC. |
| if (target_receiver_maps.length() > kMaxKeyedPolymorphism) return; |
| |
| // Make sure all polymorphic handlers have the same store mode, otherwise the |
| // megamorphic stub must be used. |
| store_mode = GetNonTransitioningStoreMode(store_mode); |
| if (old_store_mode != STANDARD_STORE) { |
| if (store_mode == STANDARD_STORE) { |
| store_mode = old_store_mode; |
| } else if (store_mode != old_store_mode) { |
| TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "store mode mismatch"); |
| return; |
| } |
| } |
| |
| // If the store mode isn't the standard mode, make sure that all polymorphic |
| // receivers are either external arrays, or all "normal" arrays. Otherwise, |
| // use the megamorphic stub. |
| if (store_mode != STANDARD_STORE) { |
| int external_arrays = 0; |
| for (int i = 0; i < target_receiver_maps.length(); ++i) { |
| if (target_receiver_maps[i]->has_fixed_typed_array_elements()) { |
| external_arrays++; |
| } |
| } |
| if (external_arrays != 0 && |
| external_arrays != target_receiver_maps.length()) { |
| TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", |
| "unsupported combination of external and normal arrays"); |
| return; |
| } |
| } |
| |
| TRACE_HANDLER_STATS(isolate(), KeyedStoreIC_Polymorphic); |
| MapHandleList transitioned_maps(target_receiver_maps.length()); |
| CodeHandleList handlers(target_receiver_maps.length()); |
| PropertyICCompiler::ComputeKeyedStorePolymorphicHandlers( |
| &target_receiver_maps, &transitioned_maps, &handlers, store_mode); |
| ConfigureVectorState(&target_receiver_maps, &transitioned_maps, &handlers); |
| } |
| |
| |
| Handle<Map> KeyedStoreIC::ComputeTransitionedMap( |
| Handle<Map> map, KeyedAccessStoreMode store_mode) { |
| switch (store_mode) { |
| case STORE_TRANSITION_TO_OBJECT: |
| case STORE_AND_GROW_TRANSITION_TO_OBJECT: { |
| ElementsKind kind = IsFastHoleyElementsKind(map->elements_kind()) |
| ? FAST_HOLEY_ELEMENTS |
| : FAST_ELEMENTS; |
| return Map::TransitionElementsTo(map, kind); |
| } |
| case STORE_TRANSITION_TO_DOUBLE: |
| case STORE_AND_GROW_TRANSITION_TO_DOUBLE: { |
| ElementsKind kind = IsFastHoleyElementsKind(map->elements_kind()) |
| ? FAST_HOLEY_DOUBLE_ELEMENTS |
| : FAST_DOUBLE_ELEMENTS; |
| return Map::TransitionElementsTo(map, kind); |
| } |
| case STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS: |
| DCHECK(map->has_fixed_typed_array_elements()); |
| // Fall through |
| case STORE_NO_TRANSITION_HANDLE_COW: |
| case STANDARD_STORE: |
| case STORE_AND_GROW_NO_TRANSITION: |
| return map; |
| } |
| UNREACHABLE(); |
| return MaybeHandle<Map>().ToHandleChecked(); |
| } |
| |
| |
| bool IsOutOfBoundsAccess(Handle<JSObject> receiver, uint32_t index) { |
| uint32_t length = 0; |
| if (receiver->IsJSArray()) { |
| JSArray::cast(*receiver)->length()->ToArrayLength(&length); |
| } else { |
| length = static_cast<uint32_t>(receiver->elements()->length()); |
| } |
| return index >= length; |
| } |
| |
| |
| static KeyedAccessStoreMode GetStoreMode(Handle<JSObject> receiver, |
| uint32_t index, Handle<Object> value) { |
| bool oob_access = IsOutOfBoundsAccess(receiver, index); |
| // Don't consider this a growing store if the store would send the receiver to |
| // dictionary mode. |
| bool allow_growth = receiver->IsJSArray() && oob_access && |
| !receiver->WouldConvertToSlowElements(index); |
| if (allow_growth) { |
| // Handle growing array in stub if necessary. |
| if (receiver->HasFastSmiElements()) { |
| if (value->IsHeapNumber()) { |
| return STORE_AND_GROW_TRANSITION_TO_DOUBLE; |
| } |
| if (value->IsHeapObject()) { |
| return STORE_AND_GROW_TRANSITION_TO_OBJECT; |
| } |
| } else if (receiver->HasFastDoubleElements()) { |
| if (!value->IsSmi() && !value->IsHeapNumber()) { |
| return STORE_AND_GROW_TRANSITION_TO_OBJECT; |
| } |
| } |
| return STORE_AND_GROW_NO_TRANSITION; |
| } else { |
| // Handle only in-bounds elements accesses. |
| if (receiver->HasFastSmiElements()) { |
| if (value->IsHeapNumber()) { |
| return STORE_TRANSITION_TO_DOUBLE; |
| } else if (value->IsHeapObject()) { |
| return STORE_TRANSITION_TO_OBJECT; |
| } |
| } else if (receiver->HasFastDoubleElements()) { |
| if (!value->IsSmi() && !value->IsHeapNumber()) { |
| return STORE_TRANSITION_TO_OBJECT; |
| } |
| } |
| if (!FLAG_trace_external_array_abuse && |
| receiver->map()->has_fixed_typed_array_elements() && oob_access) { |
| return STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS; |
| } |
| Heap* heap = receiver->GetHeap(); |
| if (receiver->elements()->map() == heap->fixed_cow_array_map()) { |
| return STORE_NO_TRANSITION_HANDLE_COW; |
| } else { |
| return STANDARD_STORE; |
| } |
| } |
| } |
| |
| |
| MaybeHandle<Object> KeyedStoreIC::Store(Handle<Object> object, |
| Handle<Object> key, |
| Handle<Object> value) { |
| // TODO(verwaest): Let SetProperty do the migration, since storing a property |
| // might deprecate the current map again, if value does not fit. |
| if (MigrateDeprecated(object)) { |
| Handle<Object> result; |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate(), result, Runtime::SetObjectProperty(isolate(), object, key, |
| value, language_mode()), |
| Object); |
| return result; |
| } |
| |
| // Check for non-string values that can be converted into an |
| // internalized string directly or is representable as a smi. |
| key = TryConvertKey(key, isolate()); |
| |
| Handle<Object> store_handle; |
| |
| uint32_t index; |
| if ((key->IsInternalizedString() && |
| !String::cast(*key)->AsArrayIndex(&index)) || |
| key->IsSymbol()) { |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate(), store_handle, |
| StoreIC::Store(object, Handle<Name>::cast(key), value, |
| JSReceiver::MAY_BE_STORE_FROM_KEYED), |
| Object); |
| if (!is_vector_set()) { |
| ConfigureVectorState(MEGAMORPHIC, key); |
| TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", |
| "unhandled internalized string key"); |
| TRACE_IC("StoreIC", key); |
| } |
| return store_handle; |
| } |
| |
| bool use_ic = FLAG_use_ic && !object->IsStringWrapper() && |
| !object->IsAccessCheckNeeded() && !object->IsJSGlobalProxy(); |
| if (use_ic && !object->IsSmi()) { |
| // Don't use ICs for maps of the objects in Array's prototype chain. We |
| // expect to be able to trap element sets to objects with those maps in |
| // the runtime to enable optimization of element hole access. |
| Handle<HeapObject> heap_object = Handle<HeapObject>::cast(object); |
| if (heap_object->map()->IsMapInArrayPrototypeChain()) { |
| TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "map in array prototype"); |
| use_ic = false; |
| } |
| } |
| |
| Handle<Map> old_receiver_map; |
| bool sloppy_arguments_elements = false; |
| bool key_is_valid_index = false; |
| KeyedAccessStoreMode store_mode = STANDARD_STORE; |
| if (use_ic && object->IsJSObject()) { |
| Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| old_receiver_map = handle(receiver->map(), isolate()); |
| sloppy_arguments_elements = |
| !is_sloppy(language_mode()) && |
| receiver->elements()->map() == |
| isolate()->heap()->sloppy_arguments_elements_map(); |
| if (!sloppy_arguments_elements) { |
| key_is_valid_index = key->IsSmi() && Smi::cast(*key)->value() >= 0; |
| if (key_is_valid_index) { |
| uint32_t index = static_cast<uint32_t>(Smi::cast(*key)->value()); |
| store_mode = GetStoreMode(receiver, index, value); |
| } |
| } |
| } |
| |
| DCHECK(store_handle.is_null()); |
| ASSIGN_RETURN_ON_EXCEPTION(isolate(), store_handle, |
| Runtime::SetObjectProperty(isolate(), object, key, |
| value, language_mode()), |
| Object); |
| |
| if (use_ic) { |
| if (!old_receiver_map.is_null()) { |
| if (sloppy_arguments_elements) { |
| TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "arguments receiver"); |
| } else if (key_is_valid_index) { |
| // We should go generic if receiver isn't a dictionary, but our |
| // prototype chain does have dictionary elements. This ensures that |
| // other non-dictionary receivers in the polymorphic case benefit |
| // from fast path keyed stores. |
| if (!old_receiver_map->DictionaryElementsInPrototypeChainOnly()) { |
| UpdateStoreElement(old_receiver_map, store_mode); |
| } else { |
| TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", |
| "dictionary or proxy prototype"); |
| } |
| } else { |
| TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "non-smi-like key"); |
| } |
| } else { |
| TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "non-JSObject receiver"); |
| } |
| } |
| |
| if (!is_vector_set()) { |
| ConfigureVectorState(MEGAMORPHIC, key); |
| TRACE_GENERIC_IC(isolate(), "KeyedStoreIC", "set generic"); |
| } |
| TRACE_IC("StoreIC", key); |
| |
| return store_handle; |
| } |
| |
| |
| void CallIC::HandleMiss(Handle<Object> function) { |
| Handle<Object> name = isolate()->factory()->empty_string(); |
| CallICNexus* nexus = casted_nexus<CallICNexus>(); |
| Object* feedback = nexus->GetFeedback(); |
| |
| // Hand-coded MISS handling is easier if CallIC slots don't contain smis. |
| DCHECK(!feedback->IsSmi()); |
| |
| if (feedback->IsWeakCell() || !function->IsJSFunction() || |
| feedback->IsAllocationSite()) { |
| // We are going generic. |
| nexus->ConfigureMegamorphic(); |
| } else { |
| DCHECK(feedback == *TypeFeedbackVector::UninitializedSentinel(isolate())); |
| Handle<JSFunction> js_function = Handle<JSFunction>::cast(function); |
| |
| Handle<JSFunction> array_function = |
| Handle<JSFunction>(isolate()->native_context()->array_function()); |
| if (array_function.is_identical_to(js_function)) { |
| // Alter the slot. |
| nexus->ConfigureMonomorphicArray(); |
| } else if (js_function->context()->native_context() != |
| *isolate()->native_context()) { |
| // Don't collect cross-native context feedback for the CallIC. |
| // TODO(bmeurer): We should collect the SharedFunctionInfo as |
| // feedback in this case instead. |
| nexus->ConfigureMegamorphic(); |
| } else { |
| nexus->ConfigureMonomorphic(js_function); |
| } |
| } |
| |
| if (function->IsJSFunction()) { |
| Handle<JSFunction> js_function = Handle<JSFunction>::cast(function); |
| name = handle(js_function->shared()->name(), isolate()); |
| } |
| |
| OnTypeFeedbackChanged(isolate(), get_host()); |
| TRACE_IC("CallIC", name); |
| } |
| |
| |
| #undef TRACE_IC |
| |
| |
| // ---------------------------------------------------------------------------- |
| // Static IC stub generators. |
| // |
| |
| // Used from ic-<arch>.cc. |
| RUNTIME_FUNCTION(Runtime_CallIC_Miss) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 3); |
| Handle<Object> function = args.at<Object>(0); |
| Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(1); |
| Handle<Smi> slot = args.at<Smi>(2); |
| FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| CallICNexus nexus(vector, vector_slot); |
| CallIC ic(isolate, &nexus); |
| ic.HandleMiss(function); |
| return *function; |
| } |
| |
| |
| // Used from ic-<arch>.cc. |
| RUNTIME_FUNCTION(Runtime_LoadIC_Miss) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| Handle<Object> receiver = args.at<Object>(0); |
| |
| DCHECK_EQ(4, args.length()); |
| Handle<Smi> slot = args.at<Smi>(2); |
| Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(3); |
| FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| // A monomorphic or polymorphic KeyedLoadIC with a string key can call the |
| // LoadIC miss handler if the handler misses. Since the vector Nexus is |
| // set up outside the IC, handle that here. |
| FeedbackVectorSlotKind kind = vector->GetKind(vector_slot); |
| if (kind == FeedbackVectorSlotKind::LOAD_IC) { |
| Handle<Name> key = args.at<Name>(1); |
| LoadICNexus nexus(vector, vector_slot); |
| LoadIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Load(receiver, key)); |
| |
| } else if (kind == FeedbackVectorSlotKind::LOAD_GLOBAL_IC) { |
| Handle<Name> key(vector->GetName(vector_slot), isolate); |
| DCHECK_NE(*key, *isolate->factory()->empty_string()); |
| DCHECK_EQ(*isolate->global_object(), *receiver); |
| LoadGlobalICNexus nexus(vector, vector_slot); |
| LoadGlobalIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Load(key)); |
| |
| } else { |
| Handle<Name> key = args.at<Name>(1); |
| DCHECK_EQ(FeedbackVectorSlotKind::KEYED_LOAD_IC, kind); |
| KeyedLoadICNexus nexus(vector, vector_slot); |
| KeyedLoadIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Load(receiver, key)); |
| } |
| } |
| |
| // Used from ic-<arch>.cc. |
| RUNTIME_FUNCTION(Runtime_LoadGlobalIC_Miss) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| Handle<JSGlobalObject> global = isolate->global_object(); |
| Handle<Smi> slot = args.at<Smi>(0); |
| Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(1); |
| FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| DCHECK_EQ(FeedbackVectorSlotKind::LOAD_GLOBAL_IC, |
| vector->GetKind(vector_slot)); |
| Handle<String> name(vector->GetName(vector_slot), isolate); |
| DCHECK_NE(*name, *isolate->factory()->empty_string()); |
| |
| LoadGlobalICNexus nexus(vector, vector_slot); |
| LoadGlobalIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| ic.UpdateState(global, name); |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, ic.Load(name)); |
| return *result; |
| } |
| |
| RUNTIME_FUNCTION(Runtime_LoadGlobalIC_Slow) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_SMI_ARG_CHECKED(slot, 0); |
| CONVERT_ARG_HANDLE_CHECKED(TypeFeedbackVector, vector, 1); |
| |
| FeedbackVectorSlot vector_slot = vector->ToSlot(slot); |
| DCHECK_EQ(FeedbackVectorSlotKind::LOAD_GLOBAL_IC, |
| vector->GetKind(vector_slot)); |
| Handle<String> name(vector->GetName(vector_slot), isolate); |
| DCHECK_NE(*name, *isolate->factory()->empty_string()); |
| |
| Handle<JSGlobalObject> global = isolate->global_object(); |
| |
| Handle<ScriptContextTable> script_contexts( |
| global->native_context()->script_context_table()); |
| |
| ScriptContextTable::LookupResult lookup_result; |
| if (ScriptContextTable::Lookup(script_contexts, name, &lookup_result)) { |
| Handle<Context> script_context = ScriptContextTable::GetContext( |
| script_contexts, lookup_result.context_index); |
| Handle<Object> result = |
| FixedArray::get(*script_context, lookup_result.slot_index, isolate); |
| if (*result == *isolate->factory()->the_hole_value()) { |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, NewReferenceError(MessageTemplate::kNotDefined, name)); |
| } |
| return *result; |
| } |
| |
| Handle<Object> result; |
| bool is_found = false; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, |
| Runtime::GetObjectProperty(isolate, global, name, &is_found)); |
| if (!is_found) { |
| LoadICNexus nexus(isolate); |
| LoadIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| // It is actually a LoadGlobalICs here but the predicate handles this case |
| // properly. |
| if (ic.ShouldThrowReferenceError()) { |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, NewReferenceError(MessageTemplate::kNotDefined, name)); |
| } |
| } |
| return *result; |
| } |
| |
| // Used from ic-<arch>.cc |
| RUNTIME_FUNCTION(Runtime_KeyedLoadIC_Miss) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| Handle<Object> receiver = args.at<Object>(0); |
| Handle<Object> key = args.at<Object>(1); |
| |
| DCHECK(args.length() == 4); |
| Handle<Smi> slot = args.at<Smi>(2); |
| Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(3); |
| FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| KeyedLoadICNexus nexus(vector, vector_slot); |
| KeyedLoadIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Load(receiver, key)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_KeyedLoadIC_MissFromStubFailure) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| Handle<Object> receiver = args.at<Object>(0); |
| Handle<Object> key = args.at<Object>(1); |
| |
| DCHECK(args.length() == 4); |
| Handle<Smi> slot = args.at<Smi>(2); |
| Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(3); |
| FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| KeyedLoadICNexus nexus(vector, vector_slot); |
| KeyedLoadIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Load(receiver, key)); |
| } |
| |
| |
| // Used from ic-<arch>.cc. |
| RUNTIME_FUNCTION(Runtime_StoreIC_Miss) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| Handle<Object> receiver = args.at<Object>(0); |
| Handle<Name> key = args.at<Name>(1); |
| Handle<Object> value = args.at<Object>(2); |
| |
| DCHECK(args.length() == 5 || args.length() == 6); |
| Handle<Smi> slot = args.at<Smi>(3); |
| Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(4); |
| FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| if (vector->GetKind(vector_slot) == FeedbackVectorSlotKind::STORE_IC) { |
| StoreICNexus nexus(vector, vector_slot); |
| StoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Store(receiver, key, value)); |
| } else { |
| DCHECK_EQ(FeedbackVectorSlotKind::KEYED_STORE_IC, |
| vector->GetKind(vector_slot)); |
| KeyedStoreICNexus nexus(vector, vector_slot); |
| KeyedStoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Store(receiver, key, value)); |
| } |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_StoreIC_MissFromStubFailure) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| Handle<Object> receiver = args.at<Object>(0); |
| Handle<Name> key = args.at<Name>(1); |
| Handle<Object> value = args.at<Object>(2); |
| |
| int length = args.length(); |
| DCHECK(length == 5 || length == 6); |
| // We might have slot and vector, for a normal miss (slot(3), vector(4)). |
| // Or, map and vector for a transitioning store miss (map(3), vector(4)). |
| // In this case, we need to recover the slot from a virtual register. |
| // If length == 6, then a map is included (map(3), slot(4), vector(5)). |
| Handle<Smi> slot; |
| Handle<TypeFeedbackVector> vector; |
| if (length == 5) { |
| if (args.at<Object>(3)->IsMap()) { |
| vector = args.at<TypeFeedbackVector>(4); |
| slot = handle( |
| *reinterpret_cast<Smi**>(isolate->virtual_slot_register_address()), |
| isolate); |
| } else { |
| vector = args.at<TypeFeedbackVector>(4); |
| slot = args.at<Smi>(3); |
| } |
| } else { |
| vector = args.at<TypeFeedbackVector>(5); |
| slot = args.at<Smi>(4); |
| } |
| |
| FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| if (vector->GetKind(vector_slot) == FeedbackVectorSlotKind::STORE_IC) { |
| StoreICNexus nexus(vector, vector_slot); |
| StoreIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Store(receiver, key, value)); |
| } else { |
| DCHECK_EQ(FeedbackVectorSlotKind::KEYED_STORE_IC, |
| vector->GetKind(vector_slot)); |
| KeyedStoreICNexus nexus(vector, vector_slot); |
| KeyedStoreIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Store(receiver, key, value)); |
| } |
| } |
| |
| |
| // Used from ic-<arch>.cc. |
| RUNTIME_FUNCTION(Runtime_KeyedStoreIC_Miss) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| Handle<Object> receiver = args.at<Object>(0); |
| Handle<Object> key = args.at<Object>(1); |
| Handle<Object> value = args.at<Object>(2); |
| |
| DCHECK(args.length() == 5); |
| Handle<Smi> slot = args.at<Smi>(3); |
| Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(4); |
| FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| KeyedStoreICNexus nexus(vector, vector_slot); |
| KeyedStoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Store(receiver, key, value)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_KeyedStoreIC_MissFromStubFailure) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| Handle<Object> receiver = args.at<Object>(0); |
| Handle<Object> key = args.at<Object>(1); |
| Handle<Object> value = args.at<Object>(2); |
| |
| DCHECK(args.length() == 5); |
| Handle<Smi> slot = args.at<Smi>(3); |
| Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(4); |
| FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| KeyedStoreICNexus nexus(vector, vector_slot); |
| KeyedStoreIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Store(receiver, key, value)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_StoreIC_Slow) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 5); |
| Handle<Object> object = args.at<Object>(0); |
| Handle<Object> key = args.at<Object>(1); |
| Handle<Object> value = args.at<Object>(2); |
| LanguageMode language_mode; |
| StoreICNexus nexus(isolate); |
| StoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| language_mode = ic.language_mode(); |
| RETURN_RESULT_OR_FAILURE( |
| isolate, |
| Runtime::SetObjectProperty(isolate, object, key, value, language_mode)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_KeyedStoreIC_Slow) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 5); |
| Handle<Object> object = args.at<Object>(0); |
| Handle<Object> key = args.at<Object>(1); |
| Handle<Object> value = args.at<Object>(2); |
| LanguageMode language_mode; |
| KeyedStoreICNexus nexus(isolate); |
| KeyedStoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| language_mode = ic.language_mode(); |
| RETURN_RESULT_OR_FAILURE( |
| isolate, |
| Runtime::SetObjectProperty(isolate, object, key, value, language_mode)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ElementsTransitionAndStoreIC_Miss) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| // Length == 5 or 6, depending on whether the vector slot |
| // is passed in a virtual register or not. |
| DCHECK(args.length() == 5 || args.length() == 6); |
| Handle<Object> object = args.at<Object>(0); |
| Handle<Object> key = args.at<Object>(1); |
| Handle<Object> value = args.at<Object>(2); |
| Handle<Map> map = args.at<Map>(3); |
| LanguageMode language_mode; |
| KeyedStoreICNexus nexus(isolate); |
| KeyedStoreIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| language_mode = ic.language_mode(); |
| if (object->IsJSObject()) { |
| JSObject::TransitionElementsKind(Handle<JSObject>::cast(object), |
| map->elements_kind()); |
| } |
| RETURN_RESULT_OR_FAILURE( |
| isolate, |
| Runtime::SetObjectProperty(isolate, object, key, value, language_mode)); |
| } |
| |
| |
| MaybeHandle<Object> BinaryOpIC::Transition( |
| Handle<AllocationSite> allocation_site, Handle<Object> left, |
| Handle<Object> right) { |
| BinaryOpICState state(isolate(), extra_ic_state()); |
| |
| // Compute the actual result using the builtin for the binary operation. |
| Handle<Object> result; |
| switch (state.op()) { |
| default: |
| UNREACHABLE(); |
| case Token::ADD: |
| ASSIGN_RETURN_ON_EXCEPTION(isolate(), result, |
| Object::Add(isolate(), left, right), Object); |
| break; |
| case Token::SUB: |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate(), result, Object::Subtract(isolate(), left, right), Object); |
| break; |
| case Token::MUL: |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate(), result, Object::Multiply(isolate(), left, right), Object); |
| break; |
| case Token::DIV: |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate(), result, Object::Divide(isolate(), left, right), Object); |
| break; |
| case Token::MOD: |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate(), result, Object::Modulus(isolate(), left, right), Object); |
| break; |
| case Token::BIT_OR: |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate(), result, Object::BitwiseOr(isolate(), left, right), Object); |
| break; |
| case Token::BIT_AND: |
| ASSIGN_RETURN_ON_EXCEPTION(isolate(), result, |
| Object::BitwiseAnd(isolate(), left, right), |
| Object); |
| break; |
| case Token::BIT_XOR: |
| ASSIGN_RETURN_ON_EXCEPTION(isolate(), result, |
| Object::BitwiseXor(isolate(), left, right), |
| Object); |
| break; |
| case Token::SAR: |
| ASSIGN_RETURN_ON_EXCEPTION(isolate(), result, |
| Object::ShiftRight(isolate(), left, right), |
| Object); |
| break; |
| case Token::SHR: |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate(), result, Object::ShiftRightLogical(isolate(), left, right), |
| Object); |
| break; |
| case Token::SHL: |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate(), result, Object::ShiftLeft(isolate(), left, right), Object); |
| break; |
| } |
| |
| // Do not try to update the target if the code was marked for lazy |
| // deoptimization. (Since we do not relocate addresses in these |
| // code objects, an attempt to access the target could fail.) |
| if (AddressIsDeoptimizedCode()) { |
| return result; |
| } |
| |
| // Compute the new state. |
| BinaryOpICState old_state(isolate(), target()->extra_ic_state()); |
| state.Update(left, right, result); |
| |
| // Check if we have a string operation here. |
| Handle<Code> new_target; |
| if (!allocation_site.is_null() || state.ShouldCreateAllocationMementos()) { |
| // Setup the allocation site on-demand. |
| if (allocation_site.is_null()) { |
| allocation_site = isolate()->factory()->NewAllocationSite(); |
| } |
| |
| // Install the stub with an allocation site. |
| BinaryOpICWithAllocationSiteStub stub(isolate(), state); |
| new_target = stub.GetCodeCopyFromTemplate(allocation_site); |
| |
| // Sanity check the trampoline stub. |
| DCHECK_EQ(*allocation_site, new_target->FindFirstAllocationSite()); |
| } else { |
| // Install the generic stub. |
| BinaryOpICStub stub(isolate(), state); |
| new_target = stub.GetCode(); |
| |
| // Sanity check the generic stub. |
| DCHECK_NULL(new_target->FindFirstAllocationSite()); |
| } |
| set_target(*new_target); |
| |
| if (FLAG_trace_ic) { |
| OFStream os(stdout); |
| os << "[BinaryOpIC" << old_state << " => " << state << " @ " |
| << static_cast<void*>(*new_target) << " <- "; |
| JavaScriptFrame::PrintTop(isolate(), stdout, false, true); |
| if (!allocation_site.is_null()) { |
| os << " using allocation site " << static_cast<void*>(*allocation_site); |
| } |
| os << "]" << std::endl; |
| } |
| |
| // Patch the inlined smi code as necessary. |
| if (!old_state.UseInlinedSmiCode() && state.UseInlinedSmiCode()) { |
| PatchInlinedSmiCode(isolate(), address(), ENABLE_INLINED_SMI_CHECK); |
| } else if (old_state.UseInlinedSmiCode() && !state.UseInlinedSmiCode()) { |
| PatchInlinedSmiCode(isolate(), address(), DISABLE_INLINED_SMI_CHECK); |
| } |
| |
| return result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_BinaryOpIC_Miss) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| Handle<Object> left = args.at<Object>(BinaryOpICStub::kLeft); |
| Handle<Object> right = args.at<Object>(BinaryOpICStub::kRight); |
| BinaryOpIC ic(isolate); |
| RETURN_RESULT_OR_FAILURE( |
| isolate, ic.Transition(Handle<AllocationSite>::null(), left, right)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_BinaryOpIC_MissWithAllocationSite) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| DCHECK_EQ(3, args.length()); |
| Handle<AllocationSite> allocation_site = |
| args.at<AllocationSite>(BinaryOpWithAllocationSiteStub::kAllocationSite); |
| Handle<Object> left = args.at<Object>(BinaryOpWithAllocationSiteStub::kLeft); |
| Handle<Object> right = |
| args.at<Object>(BinaryOpWithAllocationSiteStub::kRight); |
| BinaryOpIC ic(isolate); |
| RETURN_RESULT_OR_FAILURE(isolate, |
| ic.Transition(allocation_site, left, right)); |
| } |
| |
| Code* CompareIC::GetRawUninitialized(Isolate* isolate, Token::Value op) { |
| CompareICStub stub(isolate, op, CompareICState::UNINITIALIZED, |
| CompareICState::UNINITIALIZED, |
| CompareICState::UNINITIALIZED); |
| Code* code = NULL; |
| CHECK(stub.FindCodeInCache(&code)); |
| return code; |
| } |
| |
| Handle<Code> CompareIC::GetUninitialized(Isolate* isolate, Token::Value op) { |
| CompareICStub stub(isolate, op, CompareICState::UNINITIALIZED, |
| CompareICState::UNINITIALIZED, |
| CompareICState::UNINITIALIZED); |
| return stub.GetCode(); |
| } |
| |
| |
| Code* CompareIC::UpdateCaches(Handle<Object> x, Handle<Object> y) { |
| HandleScope scope(isolate()); |
| CompareICStub old_stub(target()->stub_key(), isolate()); |
| CompareICState::State new_left = |
| CompareICState::NewInputState(old_stub.left(), x); |
| CompareICState::State new_right = |
| CompareICState::NewInputState(old_stub.right(), y); |
| CompareICState::State state = CompareICState::TargetState( |
| isolate(), old_stub.state(), old_stub.left(), old_stub.right(), op_, |
| HasInlinedSmiCode(address()), x, y); |
| CompareICStub stub(isolate(), op_, new_left, new_right, state); |
| if (state == CompareICState::KNOWN_RECEIVER) { |
| stub.set_known_map( |
| Handle<Map>(Handle<JSReceiver>::cast(x)->map(), isolate())); |
| } |
| Handle<Code> new_target = stub.GetCode(); |
| set_target(*new_target); |
| |
| if (FLAG_trace_ic) { |
| PrintF("[CompareIC in "); |
| JavaScriptFrame::PrintTop(isolate(), stdout, false, true); |
| PrintF(" ((%s+%s=%s)->(%s+%s=%s))#%s @ %p]\n", |
| CompareICState::GetStateName(old_stub.left()), |
| CompareICState::GetStateName(old_stub.right()), |
| CompareICState::GetStateName(old_stub.state()), |
| CompareICState::GetStateName(new_left), |
| CompareICState::GetStateName(new_right), |
| CompareICState::GetStateName(state), Token::Name(op_), |
| static_cast<void*>(*stub.GetCode())); |
| } |
| |
| // Activate inlined smi code. |
| if (old_stub.state() == CompareICState::UNINITIALIZED) { |
| PatchInlinedSmiCode(isolate(), address(), ENABLE_INLINED_SMI_CHECK); |
| } |
| |
| return *new_target; |
| } |
| |
| |
| // Used from CompareICStub::GenerateMiss in code-stubs-<arch>.cc. |
| RUNTIME_FUNCTION(Runtime_CompareIC_Miss) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 3); |
| CompareIC ic(isolate, static_cast<Token::Value>(args.smi_at(2))); |
| return ic.UpdateCaches(args.at<Object>(0), args.at<Object>(1)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_Unreachable) { |
| UNREACHABLE(); |
| CHECK(false); |
| return isolate->heap()->undefined_value(); |
| } |
| |
| |
| Handle<Object> ToBooleanIC::ToBoolean(Handle<Object> object) { |
| ToBooleanICStub stub(isolate(), extra_ic_state()); |
| bool to_boolean_value = stub.UpdateStatus(object); |
| Handle<Code> code = stub.GetCode(); |
| set_target(*code); |
| return isolate()->factory()->ToBoolean(to_boolean_value); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ToBooleanIC_Miss) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| DCHECK(args.length() == 1); |
| HandleScope scope(isolate); |
| Handle<Object> object = args.at<Object>(0); |
| ToBooleanIC ic(isolate); |
| return *ic.ToBoolean(object); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_StoreCallbackProperty) { |
| Handle<JSObject> receiver = args.at<JSObject>(0); |
| Handle<JSObject> holder = args.at<JSObject>(1); |
| Handle<HeapObject> callback_or_cell = args.at<HeapObject>(2); |
| Handle<Name> name = args.at<Name>(3); |
| Handle<Object> value = args.at<Object>(4); |
| CONVERT_LANGUAGE_MODE_ARG_CHECKED(language_mode, 5); |
| HandleScope scope(isolate); |
| |
| if (FLAG_runtime_call_stats) { |
| RETURN_RESULT_OR_FAILURE( |
| isolate, Runtime::SetObjectProperty(isolate, receiver, name, value, |
| language_mode)); |
| } |
| |
| Handle<AccessorInfo> callback( |
| callback_or_cell->IsWeakCell() |
| ? AccessorInfo::cast(WeakCell::cast(*callback_or_cell)->value()) |
| : AccessorInfo::cast(*callback_or_cell)); |
| |
| DCHECK(callback->IsCompatibleReceiver(*receiver)); |
| |
| Address setter_address = v8::ToCData<Address>(callback->setter()); |
| v8::AccessorNameSetterCallback fun = |
| FUNCTION_CAST<v8::AccessorNameSetterCallback>(setter_address); |
| DCHECK(fun != NULL); |
| |
| Object::ShouldThrow should_throw = |
| is_sloppy(language_mode) ? Object::DONT_THROW : Object::THROW_ON_ERROR; |
| PropertyCallbackArguments custom_args(isolate, callback->data(), *receiver, |
| *holder, should_throw); |
| custom_args.Call(fun, name, value); |
| RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate); |
| return *value; |
| } |
| |
| |
| /** |
| * Attempts to load a property with an interceptor (which must be present), |
| * but doesn't search the prototype chain. |
| * |
| * Returns |Heap::no_interceptor_result_sentinel()| if interceptor doesn't |
| * provide any value for the given name. |
| */ |
| RUNTIME_FUNCTION(Runtime_LoadPropertyWithInterceptorOnly) { |
| DCHECK(args.length() == NamedLoadHandlerCompiler::kInterceptorArgsLength); |
| Handle<Name> name = |
| args.at<Name>(NamedLoadHandlerCompiler::kInterceptorArgsNameIndex); |
| Handle<Object> receiver = |
| args.at<Object>(NamedLoadHandlerCompiler::kInterceptorArgsThisIndex); |
| Handle<JSObject> holder = |
| args.at<JSObject>(NamedLoadHandlerCompiler::kInterceptorArgsHolderIndex); |
| HandleScope scope(isolate); |
| |
| if (!receiver->IsJSReceiver()) { |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, receiver, Object::ConvertReceiver(isolate, receiver)); |
| } |
| |
| InterceptorInfo* interceptor = holder->GetNamedInterceptor(); |
| PropertyCallbackArguments arguments(isolate, interceptor->data(), *receiver, |
| *holder, Object::DONT_THROW); |
| |
| v8::GenericNamedPropertyGetterCallback getter = |
| v8::ToCData<v8::GenericNamedPropertyGetterCallback>( |
| interceptor->getter()); |
| Handle<Object> result = arguments.Call(getter, name); |
| |
| RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate); |
| |
| if (!result.is_null()) return *result; |
| return isolate->heap()->no_interceptor_result_sentinel(); |
| } |
| |
| |
| /** |
| * Loads a property with an interceptor performing post interceptor |
| * lookup if interceptor failed. |
| */ |
| RUNTIME_FUNCTION(Runtime_LoadPropertyWithInterceptor) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == NamedLoadHandlerCompiler::kInterceptorArgsLength); |
| Handle<Name> name = |
| args.at<Name>(NamedLoadHandlerCompiler::kInterceptorArgsNameIndex); |
| Handle<Object> receiver = |
| args.at<Object>(NamedLoadHandlerCompiler::kInterceptorArgsThisIndex); |
| Handle<JSObject> holder = |
| args.at<JSObject>(NamedLoadHandlerCompiler::kInterceptorArgsHolderIndex); |
| |
| if (!receiver->IsJSReceiver()) { |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, receiver, Object::ConvertReceiver(isolate, receiver)); |
| } |
| |
| InterceptorInfo* interceptor = holder->GetNamedInterceptor(); |
| PropertyCallbackArguments arguments(isolate, interceptor->data(), *receiver, |
| *holder, Object::DONT_THROW); |
| |
| v8::GenericNamedPropertyGetterCallback getter = |
| v8::ToCData<v8::GenericNamedPropertyGetterCallback>( |
| interceptor->getter()); |
| Handle<Object> result = arguments.Call(getter, name); |
| |
| RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate); |
| |
| if (!result.is_null()) return *result; |
| |
| LookupIterator it(receiver, name, holder); |
| // Skip any lookup work until we hit the (possibly non-masking) interceptor. |
| while (it.state() != LookupIterator::INTERCEPTOR || |
| !it.GetHolder<JSObject>().is_identical_to(holder)) { |
| DCHECK(it.state() != LookupIterator::ACCESS_CHECK || it.HasAccess()); |
| it.Next(); |
| } |
| // Skip past the interceptor. |
| it.Next(); |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, Object::GetProperty(&it)); |
| |
| if (it.IsFound()) return *result; |
| |
| #ifdef DEBUG |
| LoadICNexus nexus(isolate); |
| LoadIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| // It could actually be any kind of LoadICs here but the predicate handles |
| // all the cases properly. |
| DCHECK(!ic.ShouldThrowReferenceError()); |
| #endif |
| |
| return isolate->heap()->undefined_value(); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_StorePropertyWithInterceptor) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 3); |
| StoreICNexus nexus(isolate); |
| StoreIC ic(IC::NO_EXTRA_FRAME, isolate, &nexus); |
| Handle<JSObject> receiver = args.at<JSObject>(0); |
| Handle<Name> name = args.at<Name>(1); |
| Handle<Object> value = args.at<Object>(2); |
| |
| DCHECK(receiver->HasNamedInterceptor()); |
| InterceptorInfo* interceptor = receiver->GetNamedInterceptor(); |
| DCHECK(!interceptor->non_masking()); |
| PropertyCallbackArguments arguments(isolate, interceptor->data(), *receiver, |
| *receiver, Object::DONT_THROW); |
| |
| v8::GenericNamedPropertySetterCallback setter = |
| v8::ToCData<v8::GenericNamedPropertySetterCallback>( |
| interceptor->setter()); |
| Handle<Object> result = arguments.Call(setter, name, value); |
| RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate); |
| if (!result.is_null()) return *value; |
| |
| LookupIterator it(receiver, name, receiver); |
| // Skip past any access check on the receiver. |
| if (it.state() == LookupIterator::ACCESS_CHECK) { |
| DCHECK(it.HasAccess()); |
| it.Next(); |
| } |
| // Skip past the interceptor on the receiver. |
| DCHECK_EQ(LookupIterator::INTERCEPTOR, it.state()); |
| it.Next(); |
| |
| MAYBE_RETURN(Object::SetProperty(&it, value, ic.language_mode(), |
| JSReceiver::CERTAINLY_NOT_STORE_FROM_KEYED), |
| isolate->heap()->exception()); |
| return *value; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_LoadElementWithInterceptor) { |
| // TODO(verwaest): This should probably get the holder and receiver as input. |
| HandleScope scope(isolate); |
| Handle<JSObject> receiver = args.at<JSObject>(0); |
| DCHECK(args.smi_at(1) >= 0); |
| uint32_t index = args.smi_at(1); |
| |
| InterceptorInfo* interceptor = receiver->GetIndexedInterceptor(); |
| PropertyCallbackArguments arguments(isolate, interceptor->data(), *receiver, |
| *receiver, Object::DONT_THROW); |
| |
| v8::IndexedPropertyGetterCallback getter = |
| v8::ToCData<v8::IndexedPropertyGetterCallback>(interceptor->getter()); |
| Handle<Object> result = arguments.Call(getter, index); |
| |
| RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate); |
| |
| if (result.is_null()) { |
| LookupIterator it(isolate, receiver, index, receiver); |
| DCHECK_EQ(LookupIterator::INTERCEPTOR, it.state()); |
| it.Next(); |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| Object::GetProperty(&it)); |
| } |
| |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_LoadIC_MissFromStubFailure) { |
| TimerEventScope<TimerEventIcMiss> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8"), "V8.IcMiss"); |
| HandleScope scope(isolate); |
| Handle<Object> receiver = args.at<Object>(0); |
| Handle<Name> key = args.at<Name>(1); |
| |
| DCHECK(args.length() == 4); |
| Handle<Smi> slot = args.at<Smi>(2); |
| Handle<TypeFeedbackVector> vector = args.at<TypeFeedbackVector>(3); |
| FeedbackVectorSlot vector_slot = vector->ToSlot(slot->value()); |
| // A monomorphic or polymorphic KeyedLoadIC with a string key can call the |
| // LoadIC miss handler if the handler misses. Since the vector Nexus is |
| // set up outside the IC, handle that here. |
| if (vector->GetKind(vector_slot) == FeedbackVectorSlotKind::LOAD_IC) { |
| LoadICNexus nexus(vector, vector_slot); |
| LoadIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Load(receiver, key)); |
| } else { |
| DCHECK_EQ(FeedbackVectorSlotKind::KEYED_LOAD_IC, |
| vector->GetKind(vector_slot)); |
| KeyedLoadICNexus nexus(vector, vector_slot); |
| KeyedLoadIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus); |
| ic.UpdateState(receiver, key); |
| RETURN_RESULT_OR_FAILURE(isolate, ic.Load(receiver, key)); |
| } |
| } |
| } // namespace internal |
| } // namespace v8 |