| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #include "bootstrapper.h" |
| #include "code-stubs.h" |
| #include "cpu-profiler.h" |
| #include "stub-cache.h" |
| #include "factory.h" |
| #include "gdb-jit.h" |
| #include "macro-assembler.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| CodeStubInterfaceDescriptor::CodeStubInterfaceDescriptor() |
| : register_param_count_(-1), |
| stack_parameter_count_(no_reg), |
| hint_stack_parameter_count_(-1), |
| function_mode_(NOT_JS_FUNCTION_STUB_MODE), |
| register_params_(NULL), |
| deoptimization_handler_(NULL), |
| handler_arguments_mode_(DONT_PASS_ARGUMENTS), |
| miss_handler_(), |
| has_miss_handler_(false) { } |
| |
| |
| bool CodeStub::FindCodeInCache(Code** code_out, Isolate* isolate) { |
| UnseededNumberDictionary* stubs = isolate->heap()->code_stubs(); |
| int index = stubs->FindEntry(GetKey()); |
| if (index != UnseededNumberDictionary::kNotFound) { |
| *code_out = Code::cast(stubs->ValueAt(index)); |
| return true; |
| } |
| return false; |
| } |
| |
| |
| SmartArrayPointer<const char> CodeStub::GetName() { |
| char buffer[100]; |
| NoAllocationStringAllocator allocator(buffer, |
| static_cast<unsigned>(sizeof(buffer))); |
| StringStream stream(&allocator); |
| PrintName(&stream); |
| return stream.ToCString(); |
| } |
| |
| |
| void CodeStub::RecordCodeGeneration(Handle<Code> code, Isolate* isolate) { |
| IC::RegisterWeakMapDependency(code); |
| SmartArrayPointer<const char> name = GetName(); |
| PROFILE(isolate, CodeCreateEvent(Logger::STUB_TAG, *code, name.get())); |
| GDBJIT(AddCode(GDBJITInterface::STUB, name.get(), *code)); |
| Counters* counters = isolate->counters(); |
| counters->total_stubs_code_size()->Increment(code->instruction_size()); |
| } |
| |
| |
| Code::Kind CodeStub::GetCodeKind() const { |
| return Code::STUB; |
| } |
| |
| |
| Handle<Code> CodeStub::GetCodeCopy(Isolate* isolate, |
| const Code::FindAndReplacePattern& pattern) { |
| Handle<Code> ic = GetCode(isolate); |
| ic = isolate->factory()->CopyCode(ic); |
| ic->FindAndReplace(pattern); |
| RecordCodeGeneration(ic, isolate); |
| return ic; |
| } |
| |
| |
| Handle<Code> PlatformCodeStub::GenerateCode(Isolate* isolate) { |
| Factory* factory = isolate->factory(); |
| |
| // Generate the new code. |
| MacroAssembler masm(isolate, NULL, 256); |
| |
| { |
| // Update the static counter each time a new code stub is generated. |
| isolate->counters()->code_stubs()->Increment(); |
| |
| // Generate the code for the stub. |
| masm.set_generating_stub(true); |
| NoCurrentFrameScope scope(&masm); |
| Generate(&masm); |
| } |
| |
| // Create the code object. |
| CodeDesc desc; |
| masm.GetCode(&desc); |
| |
| // Copy the generated code into a heap object. |
| Code::Flags flags = Code::ComputeFlags( |
| GetCodeKind(), |
| GetICState(), |
| GetExtraICState(), |
| GetStubType()); |
| Handle<Code> new_object = factory->NewCode( |
| desc, flags, masm.CodeObject(), NeedsImmovableCode()); |
| return new_object; |
| } |
| |
| |
| void CodeStub::VerifyPlatformFeatures(Isolate* isolate) { |
| ASSERT(CpuFeatures::VerifyCrossCompiling()); |
| } |
| |
| |
| Handle<Code> CodeStub::GetCode(Isolate* isolate) { |
| Factory* factory = isolate->factory(); |
| Heap* heap = isolate->heap(); |
| Code* code; |
| if (UseSpecialCache() |
| ? FindCodeInSpecialCache(&code, isolate) |
| : FindCodeInCache(&code, isolate)) { |
| ASSERT(GetCodeKind() == code->kind()); |
| return Handle<Code>(code); |
| } |
| |
| #ifdef DEBUG |
| VerifyPlatformFeatures(isolate); |
| #endif |
| |
| { |
| HandleScope scope(isolate); |
| |
| Handle<Code> new_object = GenerateCode(isolate); |
| new_object->set_major_key(MajorKey()); |
| FinishCode(new_object); |
| RecordCodeGeneration(new_object, isolate); |
| |
| #ifdef ENABLE_DISASSEMBLER |
| if (FLAG_print_code_stubs) { |
| CodeTracer::Scope trace_scope(isolate->GetCodeTracer()); |
| new_object->Disassemble(GetName().get(), trace_scope.file()); |
| PrintF(trace_scope.file(), "\n"); |
| } |
| #endif |
| |
| if (UseSpecialCache()) { |
| AddToSpecialCache(new_object); |
| } else { |
| // Update the dictionary and the root in Heap. |
| Handle<UnseededNumberDictionary> dict = |
| factory->DictionaryAtNumberPut( |
| Handle<UnseededNumberDictionary>(heap->code_stubs()), |
| GetKey(), |
| new_object); |
| heap->public_set_code_stubs(*dict); |
| } |
| code = *new_object; |
| } |
| |
| Activate(code); |
| ASSERT(!NeedsImmovableCode() || |
| heap->lo_space()->Contains(code) || |
| heap->code_space()->FirstPage()->Contains(code->address())); |
| return Handle<Code>(code, isolate); |
| } |
| |
| |
| const char* CodeStub::MajorName(CodeStub::Major major_key, |
| bool allow_unknown_keys) { |
| switch (major_key) { |
| #define DEF_CASE(name) case name: return #name "Stub"; |
| CODE_STUB_LIST(DEF_CASE) |
| #undef DEF_CASE |
| case UninitializedMajorKey: return "<UninitializedMajorKey>Stub"; |
| default: |
| if (!allow_unknown_keys) { |
| UNREACHABLE(); |
| } |
| return NULL; |
| } |
| } |
| |
| |
| void CodeStub::PrintBaseName(StringStream* stream) { |
| stream->Add("%s", MajorName(MajorKey(), false)); |
| } |
| |
| |
| void CodeStub::PrintName(StringStream* stream) { |
| PrintBaseName(stream); |
| PrintState(stream); |
| } |
| |
| |
| // static |
| void BinaryOpICStub::GenerateAheadOfTime(Isolate* isolate) { |
| // Generate the uninitialized versions of the stub. |
| for (int op = Token::BIT_OR; op <= Token::MOD; ++op) { |
| for (int mode = NO_OVERWRITE; mode <= OVERWRITE_RIGHT; ++mode) { |
| BinaryOpICStub stub(static_cast<Token::Value>(op), |
| static_cast<OverwriteMode>(mode)); |
| stub.GetCode(isolate); |
| } |
| } |
| |
| // Generate special versions of the stub. |
| BinaryOpIC::State::GenerateAheadOfTime(isolate, &GenerateAheadOfTime); |
| } |
| |
| |
| void BinaryOpICStub::PrintState(StringStream* stream) { |
| state_.Print(stream); |
| } |
| |
| |
| // static |
| void BinaryOpICStub::GenerateAheadOfTime(Isolate* isolate, |
| const BinaryOpIC::State& state) { |
| BinaryOpICStub stub(state); |
| stub.GetCode(isolate); |
| } |
| |
| |
| // static |
| void BinaryOpICWithAllocationSiteStub::GenerateAheadOfTime(Isolate* isolate) { |
| // Generate special versions of the stub. |
| BinaryOpIC::State::GenerateAheadOfTime(isolate, &GenerateAheadOfTime); |
| } |
| |
| |
| void BinaryOpICWithAllocationSiteStub::PrintState(StringStream* stream) { |
| state_.Print(stream); |
| } |
| |
| |
| // static |
| void BinaryOpICWithAllocationSiteStub::GenerateAheadOfTime( |
| Isolate* isolate, const BinaryOpIC::State& state) { |
| if (state.CouldCreateAllocationMementos()) { |
| BinaryOpICWithAllocationSiteStub stub(state); |
| stub.GetCode(isolate); |
| } |
| } |
| |
| |
| void StringAddStub::PrintBaseName(StringStream* stream) { |
| stream->Add("StringAddStub"); |
| if ((flags() & STRING_ADD_CHECK_BOTH) == STRING_ADD_CHECK_BOTH) { |
| stream->Add("_CheckBoth"); |
| } else if ((flags() & STRING_ADD_CHECK_LEFT) == STRING_ADD_CHECK_LEFT) { |
| stream->Add("_CheckLeft"); |
| } else if ((flags() & STRING_ADD_CHECK_RIGHT) == STRING_ADD_CHECK_RIGHT) { |
| stream->Add("_CheckRight"); |
| } |
| if (pretenure_flag() == TENURED) { |
| stream->Add("_Tenured"); |
| } |
| } |
| |
| |
| InlineCacheState ICCompareStub::GetICState() { |
| CompareIC::State state = Max(left_, right_); |
| switch (state) { |
| case CompareIC::UNINITIALIZED: |
| return ::v8::internal::UNINITIALIZED; |
| case CompareIC::SMI: |
| case CompareIC::NUMBER: |
| case CompareIC::INTERNALIZED_STRING: |
| case CompareIC::STRING: |
| case CompareIC::UNIQUE_NAME: |
| case CompareIC::OBJECT: |
| case CompareIC::KNOWN_OBJECT: |
| return MONOMORPHIC; |
| case CompareIC::GENERIC: |
| return ::v8::internal::GENERIC; |
| } |
| UNREACHABLE(); |
| return ::v8::internal::UNINITIALIZED; |
| } |
| |
| |
| void ICCompareStub::AddToSpecialCache(Handle<Code> new_object) { |
| ASSERT(*known_map_ != NULL); |
| Isolate* isolate = new_object->GetIsolate(); |
| Factory* factory = isolate->factory(); |
| return Map::UpdateCodeCache(known_map_, |
| strict() ? |
| factory->strict_compare_ic_string() : |
| factory->compare_ic_string(), |
| new_object); |
| } |
| |
| |
| bool ICCompareStub::FindCodeInSpecialCache(Code** code_out, Isolate* isolate) { |
| Factory* factory = isolate->factory(); |
| Code::Flags flags = Code::ComputeFlags( |
| GetCodeKind(), |
| UNINITIALIZED); |
| ASSERT(op_ == Token::EQ || op_ == Token::EQ_STRICT); |
| Handle<Object> probe( |
| known_map_->FindInCodeCache( |
| strict() ? |
| *factory->strict_compare_ic_string() : |
| *factory->compare_ic_string(), |
| flags), |
| isolate); |
| if (probe->IsCode()) { |
| *code_out = Code::cast(*probe); |
| #ifdef DEBUG |
| Token::Value cached_op; |
| ICCompareStub::DecodeMinorKey((*code_out)->stub_info(), NULL, NULL, NULL, |
| &cached_op); |
| ASSERT(op_ == cached_op); |
| #endif |
| return true; |
| } |
| return false; |
| } |
| |
| |
| int ICCompareStub::MinorKey() { |
| return OpField::encode(op_ - Token::EQ) | |
| LeftStateField::encode(left_) | |
| RightStateField::encode(right_) | |
| HandlerStateField::encode(state_); |
| } |
| |
| |
| void ICCompareStub::DecodeMinorKey(int minor_key, |
| CompareIC::State* left_state, |
| CompareIC::State* right_state, |
| CompareIC::State* handler_state, |
| Token::Value* op) { |
| if (left_state) { |
| *left_state = |
| static_cast<CompareIC::State>(LeftStateField::decode(minor_key)); |
| } |
| if (right_state) { |
| *right_state = |
| static_cast<CompareIC::State>(RightStateField::decode(minor_key)); |
| } |
| if (handler_state) { |
| *handler_state = |
| static_cast<CompareIC::State>(HandlerStateField::decode(minor_key)); |
| } |
| if (op) { |
| *op = static_cast<Token::Value>(OpField::decode(minor_key) + Token::EQ); |
| } |
| } |
| |
| |
| void ICCompareStub::Generate(MacroAssembler* masm) { |
| switch (state_) { |
| case CompareIC::UNINITIALIZED: |
| GenerateMiss(masm); |
| break; |
| case CompareIC::SMI: |
| GenerateSmis(masm); |
| break; |
| case CompareIC::NUMBER: |
| GenerateNumbers(masm); |
| break; |
| case CompareIC::STRING: |
| GenerateStrings(masm); |
| break; |
| case CompareIC::INTERNALIZED_STRING: |
| GenerateInternalizedStrings(masm); |
| break; |
| case CompareIC::UNIQUE_NAME: |
| GenerateUniqueNames(masm); |
| break; |
| case CompareIC::OBJECT: |
| GenerateObjects(masm); |
| break; |
| case CompareIC::KNOWN_OBJECT: |
| ASSERT(*known_map_ != NULL); |
| GenerateKnownObjects(masm); |
| break; |
| case CompareIC::GENERIC: |
| GenerateGeneric(masm); |
| break; |
| } |
| } |
| |
| |
| void CompareNilICStub::UpdateStatus(Handle<Object> object) { |
| ASSERT(!state_.Contains(GENERIC)); |
| State old_state(state_); |
| if (object->IsNull()) { |
| state_.Add(NULL_TYPE); |
| } else if (object->IsUndefined()) { |
| state_.Add(UNDEFINED); |
| } else if (object->IsUndetectableObject() || |
| object->IsOddball() || |
| !object->IsHeapObject()) { |
| state_.RemoveAll(); |
| state_.Add(GENERIC); |
| } else if (IsMonomorphic()) { |
| state_.RemoveAll(); |
| state_.Add(GENERIC); |
| } else { |
| state_.Add(MONOMORPHIC_MAP); |
| } |
| TraceTransition(old_state, state_); |
| } |
| |
| |
| template<class StateType> |
| void HydrogenCodeStub::TraceTransition(StateType from, StateType to) { |
| // Note: Although a no-op transition is semantically OK, it is hinting at a |
| // bug somewhere in our state transition machinery. |
| ASSERT(from != to); |
| if (!FLAG_trace_ic) return; |
| char buffer[100]; |
| NoAllocationStringAllocator allocator(buffer, |
| static_cast<unsigned>(sizeof(buffer))); |
| StringStream stream(&allocator); |
| stream.Add("["); |
| PrintBaseName(&stream); |
| stream.Add(": "); |
| from.Print(&stream); |
| stream.Add("=>"); |
| to.Print(&stream); |
| stream.Add("]\n"); |
| stream.OutputToStdOut(); |
| } |
| |
| |
| void CompareNilICStub::PrintBaseName(StringStream* stream) { |
| CodeStub::PrintBaseName(stream); |
| stream->Add((nil_value_ == kNullValue) ? "(NullValue)": |
| "(UndefinedValue)"); |
| } |
| |
| |
| void CompareNilICStub::PrintState(StringStream* stream) { |
| state_.Print(stream); |
| } |
| |
| |
| void CompareNilICStub::State::Print(StringStream* stream) const { |
| stream->Add("("); |
| SimpleListPrinter printer(stream); |
| if (IsEmpty()) printer.Add("None"); |
| if (Contains(UNDEFINED)) printer.Add("Undefined"); |
| if (Contains(NULL_TYPE)) printer.Add("Null"); |
| if (Contains(MONOMORPHIC_MAP)) printer.Add("MonomorphicMap"); |
| if (Contains(GENERIC)) printer.Add("Generic"); |
| stream->Add(")"); |
| } |
| |
| |
| Type* CompareNilICStub::GetType(Zone* zone, Handle<Map> map) { |
| if (state_.Contains(CompareNilICStub::GENERIC)) { |
| return Type::Any(zone); |
| } |
| |
| Type* result = Type::None(zone); |
| if (state_.Contains(CompareNilICStub::UNDEFINED)) { |
| result = Type::Union(result, Type::Undefined(zone), zone); |
| } |
| if (state_.Contains(CompareNilICStub::NULL_TYPE)) { |
| result = Type::Union(result, Type::Null(zone), zone); |
| } |
| if (state_.Contains(CompareNilICStub::MONOMORPHIC_MAP)) { |
| Type* type = |
| map.is_null() ? Type::Detectable(zone) : Type::Class(map, zone); |
| result = Type::Union(result, type, zone); |
| } |
| |
| return result; |
| } |
| |
| |
| Type* CompareNilICStub::GetInputType(Zone* zone, Handle<Map> map) { |
| Type* output_type = GetType(zone, map); |
| Type* nil_type = |
| nil_value_ == kNullValue ? Type::Null(zone) : Type::Undefined(zone); |
| return Type::Union(output_type, nil_type, zone); |
| } |
| |
| |
| void InstanceofStub::PrintName(StringStream* stream) { |
| const char* args = ""; |
| if (HasArgsInRegisters()) { |
| args = "_REGS"; |
| } |
| |
| const char* inline_check = ""; |
| if (HasCallSiteInlineCheck()) { |
| inline_check = "_INLINE"; |
| } |
| |
| const char* return_true_false_object = ""; |
| if (ReturnTrueFalseObject()) { |
| return_true_false_object = "_TRUEFALSE"; |
| } |
| |
| stream->Add("InstanceofStub%s%s%s", |
| args, |
| inline_check, |
| return_true_false_object); |
| } |
| |
| |
| void JSEntryStub::FinishCode(Handle<Code> code) { |
| Handle<FixedArray> handler_table = |
| code->GetIsolate()->factory()->NewFixedArray(1, TENURED); |
| handler_table->set(0, Smi::FromInt(handler_offset_)); |
| code->set_handler_table(*handler_table); |
| } |
| |
| |
| void KeyedLoadDictionaryElementPlatformStub::Generate( |
| MacroAssembler* masm) { |
| KeyedLoadStubCompiler::GenerateLoadDictionaryElement(masm); |
| } |
| |
| |
| void CreateAllocationSiteStub::GenerateAheadOfTime(Isolate* isolate) { |
| CreateAllocationSiteStub stub; |
| stub.GetCode(isolate); |
| } |
| |
| |
| void KeyedStoreElementStub::Generate(MacroAssembler* masm) { |
| switch (elements_kind_) { |
| case FAST_ELEMENTS: |
| case FAST_HOLEY_ELEMENTS: |
| case FAST_SMI_ELEMENTS: |
| case FAST_HOLEY_SMI_ELEMENTS: |
| case FAST_DOUBLE_ELEMENTS: |
| case FAST_HOLEY_DOUBLE_ELEMENTS: |
| #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \ |
| case EXTERNAL_##TYPE##_ELEMENTS: \ |
| case TYPE##_ELEMENTS: |
| |
| TYPED_ARRAYS(TYPED_ARRAY_CASE) |
| #undef TYPED_ARRAY_CASE |
| UNREACHABLE(); |
| break; |
| case DICTIONARY_ELEMENTS: |
| KeyedStoreStubCompiler::GenerateStoreDictionaryElement(masm); |
| break; |
| case SLOPPY_ARGUMENTS_ELEMENTS: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| |
| |
| void ArgumentsAccessStub::PrintName(StringStream* stream) { |
| stream->Add("ArgumentsAccessStub_"); |
| switch (type_) { |
| case READ_ELEMENT: stream->Add("ReadElement"); break; |
| case NEW_SLOPPY_FAST: stream->Add("NewSloppyFast"); break; |
| case NEW_SLOPPY_SLOW: stream->Add("NewSloppySlow"); break; |
| case NEW_STRICT: stream->Add("NewStrict"); break; |
| } |
| } |
| |
| |
| void CallFunctionStub::PrintName(StringStream* stream) { |
| stream->Add("CallFunctionStub_Args%d", argc_); |
| if (RecordCallTarget()) stream->Add("_Recording"); |
| } |
| |
| |
| void CallConstructStub::PrintName(StringStream* stream) { |
| stream->Add("CallConstructStub"); |
| if (RecordCallTarget()) stream->Add("_Recording"); |
| } |
| |
| |
| void ArrayConstructorStub::PrintName(StringStream* stream) { |
| stream->Add("ArrayConstructorStub"); |
| switch (argument_count_) { |
| case ANY: stream->Add("_Any"); break; |
| case NONE: stream->Add("_None"); break; |
| case ONE: stream->Add("_One"); break; |
| case MORE_THAN_ONE: stream->Add("_More_Than_One"); break; |
| } |
| } |
| |
| |
| void ArrayConstructorStubBase::BasePrintName(const char* name, |
| StringStream* stream) { |
| stream->Add(name); |
| stream->Add("_"); |
| stream->Add(ElementsKindToString(elements_kind())); |
| if (override_mode() == DISABLE_ALLOCATION_SITES) { |
| stream->Add("_DISABLE_ALLOCATION_SITES"); |
| } |
| } |
| |
| |
| bool ToBooleanStub::UpdateStatus(Handle<Object> object) { |
| Types old_types(types_); |
| bool to_boolean_value = types_.UpdateStatus(object); |
| TraceTransition(old_types, types_); |
| return to_boolean_value; |
| } |
| |
| |
| void ToBooleanStub::PrintState(StringStream* stream) { |
| types_.Print(stream); |
| } |
| |
| |
| void ToBooleanStub::Types::Print(StringStream* stream) const { |
| stream->Add("("); |
| SimpleListPrinter printer(stream); |
| if (IsEmpty()) printer.Add("None"); |
| if (Contains(UNDEFINED)) printer.Add("Undefined"); |
| if (Contains(BOOLEAN)) printer.Add("Bool"); |
| if (Contains(NULL_TYPE)) printer.Add("Null"); |
| if (Contains(SMI)) printer.Add("Smi"); |
| if (Contains(SPEC_OBJECT)) printer.Add("SpecObject"); |
| if (Contains(STRING)) printer.Add("String"); |
| if (Contains(SYMBOL)) printer.Add("Symbol"); |
| if (Contains(HEAP_NUMBER)) printer.Add("HeapNumber"); |
| stream->Add(")"); |
| } |
| |
| |
| bool ToBooleanStub::Types::UpdateStatus(Handle<Object> object) { |
| if (object->IsUndefined()) { |
| Add(UNDEFINED); |
| return false; |
| } else if (object->IsBoolean()) { |
| Add(BOOLEAN); |
| return object->IsTrue(); |
| } else if (object->IsNull()) { |
| Add(NULL_TYPE); |
| return false; |
| } else if (object->IsSmi()) { |
| Add(SMI); |
| return Smi::cast(*object)->value() != 0; |
| } else if (object->IsSpecObject()) { |
| Add(SPEC_OBJECT); |
| return !object->IsUndetectableObject(); |
| } else if (object->IsString()) { |
| Add(STRING); |
| return !object->IsUndetectableObject() && |
| String::cast(*object)->length() != 0; |
| } else if (object->IsSymbol()) { |
| Add(SYMBOL); |
| return true; |
| } else if (object->IsHeapNumber()) { |
| ASSERT(!object->IsUndetectableObject()); |
| Add(HEAP_NUMBER); |
| double value = HeapNumber::cast(*object)->value(); |
| return value != 0 && !std::isnan(value); |
| } else { |
| // We should never see an internal object at runtime here! |
| UNREACHABLE(); |
| return true; |
| } |
| } |
| |
| |
| bool ToBooleanStub::Types::NeedsMap() const { |
| return Contains(ToBooleanStub::SPEC_OBJECT) |
| || Contains(ToBooleanStub::STRING) |
| || Contains(ToBooleanStub::SYMBOL) |
| || Contains(ToBooleanStub::HEAP_NUMBER); |
| } |
| |
| |
| bool ToBooleanStub::Types::CanBeUndetectable() const { |
| return Contains(ToBooleanStub::SPEC_OBJECT) |
| || Contains(ToBooleanStub::STRING); |
| } |
| |
| |
| void StubFailureTrampolineStub::GenerateAheadOfTime(Isolate* isolate) { |
| StubFailureTrampolineStub stub1(NOT_JS_FUNCTION_STUB_MODE); |
| StubFailureTrampolineStub stub2(JS_FUNCTION_STUB_MODE); |
| stub1.GetCode(isolate); |
| stub2.GetCode(isolate); |
| } |
| |
| |
| void ProfileEntryHookStub::EntryHookTrampoline(intptr_t function, |
| intptr_t stack_pointer, |
| Isolate* isolate) { |
| FunctionEntryHook entry_hook = isolate->function_entry_hook(); |
| ASSERT(entry_hook != NULL); |
| entry_hook(function, stack_pointer); |
| } |
| |
| |
| static void InstallDescriptor(Isolate* isolate, HydrogenCodeStub* stub) { |
| int major_key = stub->MajorKey(); |
| CodeStubInterfaceDescriptor* descriptor = |
| isolate->code_stub_interface_descriptor(major_key); |
| if (!descriptor->initialized()) { |
| stub->InitializeInterfaceDescriptor(isolate, descriptor); |
| } |
| } |
| |
| |
| void ArrayConstructorStubBase::InstallDescriptors(Isolate* isolate) { |
| ArrayNoArgumentConstructorStub stub1(GetInitialFastElementsKind()); |
| InstallDescriptor(isolate, &stub1); |
| ArraySingleArgumentConstructorStub stub2(GetInitialFastElementsKind()); |
| InstallDescriptor(isolate, &stub2); |
| ArrayNArgumentsConstructorStub stub3(GetInitialFastElementsKind()); |
| InstallDescriptor(isolate, &stub3); |
| } |
| |
| |
| void NumberToStringStub::InstallDescriptors(Isolate* isolate) { |
| NumberToStringStub stub; |
| InstallDescriptor(isolate, &stub); |
| } |
| |
| |
| void FastNewClosureStub::InstallDescriptors(Isolate* isolate) { |
| FastNewClosureStub stub(STRICT, false); |
| InstallDescriptor(isolate, &stub); |
| } |
| |
| |
| void FastNewContextStub::InstallDescriptors(Isolate* isolate) { |
| FastNewContextStub stub(FastNewContextStub::kMaximumSlots); |
| InstallDescriptor(isolate, &stub); |
| } |
| |
| |
| // static |
| void FastCloneShallowArrayStub::InstallDescriptors(Isolate* isolate) { |
| FastCloneShallowArrayStub stub(FastCloneShallowArrayStub::CLONE_ELEMENTS, |
| DONT_TRACK_ALLOCATION_SITE, 0); |
| InstallDescriptor(isolate, &stub); |
| } |
| |
| |
| // static |
| void BinaryOpICStub::InstallDescriptors(Isolate* isolate) { |
| BinaryOpICStub stub(Token::ADD, NO_OVERWRITE); |
| InstallDescriptor(isolate, &stub); |
| } |
| |
| |
| // static |
| void BinaryOpWithAllocationSiteStub::InstallDescriptors(Isolate* isolate) { |
| BinaryOpWithAllocationSiteStub stub(Token::ADD, NO_OVERWRITE); |
| InstallDescriptor(isolate, &stub); |
| } |
| |
| |
| // static |
| void StringAddStub::InstallDescriptors(Isolate* isolate) { |
| StringAddStub stub(STRING_ADD_CHECK_NONE, NOT_TENURED); |
| InstallDescriptor(isolate, &stub); |
| } |
| |
| |
| // static |
| void RegExpConstructResultStub::InstallDescriptors(Isolate* isolate) { |
| RegExpConstructResultStub stub; |
| InstallDescriptor(isolate, &stub); |
| } |
| |
| |
| ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate) |
| : argument_count_(ANY) { |
| ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate); |
| } |
| |
| |
| ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate, |
| int argument_count) { |
| if (argument_count == 0) { |
| argument_count_ = NONE; |
| } else if (argument_count == 1) { |
| argument_count_ = ONE; |
| } else if (argument_count >= 2) { |
| argument_count_ = MORE_THAN_ONE; |
| } else { |
| UNREACHABLE(); |
| } |
| ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate); |
| } |
| |
| |
| void InternalArrayConstructorStubBase::InstallDescriptors(Isolate* isolate) { |
| InternalArrayNoArgumentConstructorStub stub1(FAST_ELEMENTS); |
| InstallDescriptor(isolate, &stub1); |
| InternalArraySingleArgumentConstructorStub stub2(FAST_ELEMENTS); |
| InstallDescriptor(isolate, &stub2); |
| InternalArrayNArgumentsConstructorStub stub3(FAST_ELEMENTS); |
| InstallDescriptor(isolate, &stub3); |
| } |
| |
| InternalArrayConstructorStub::InternalArrayConstructorStub( |
| Isolate* isolate) { |
| InternalArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate); |
| } |
| |
| |
| } } // namespace v8::internal |