| // 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/compiler.h" |
| |
| #include <algorithm> |
| #include <memory> |
| |
| #include "src/asmjs/asm-js.h" |
| #include "src/asmjs/asm-typer.h" |
| #include "src/ast/ast-numbering.h" |
| #include "src/ast/prettyprinter.h" |
| #include "src/ast/scopes.h" |
| #include "src/bootstrapper.h" |
| #include "src/codegen.h" |
| #include "src/compilation-cache.h" |
| #include "src/compiler-dispatcher/optimizing-compile-dispatcher.h" |
| #include "src/compiler/pipeline.h" |
| #include "src/crankshaft/hydrogen.h" |
| #include "src/debug/debug.h" |
| #include "src/debug/liveedit.h" |
| #include "src/frames-inl.h" |
| #include "src/full-codegen/full-codegen.h" |
| #include "src/globals.h" |
| #include "src/heap/heap.h" |
| #include "src/interpreter/interpreter.h" |
| #include "src/isolate-inl.h" |
| #include "src/log-inl.h" |
| #include "src/messages.h" |
| #include "src/parsing/parsing.h" |
| #include "src/parsing/rewriter.h" |
| #include "src/parsing/scanner-character-streams.h" |
| #include "src/runtime-profiler.h" |
| #include "src/snapshot/code-serializer.h" |
| #include "src/vm-state-inl.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // A wrapper around a CompilationInfo that detaches the Handles from |
| // the underlying DeferredHandleScope and stores them in info_ on |
| // destruction. |
| class CompilationHandleScope final { |
| public: |
| explicit CompilationHandleScope(CompilationInfo* info) |
| : deferred_(info->isolate()), info_(info) {} |
| ~CompilationHandleScope() { info_->set_deferred_handles(deferred_.Detach()); } |
| |
| private: |
| DeferredHandleScope deferred_; |
| CompilationInfo* info_; |
| }; |
| |
| // Helper that times a scoped region and records the elapsed time. |
| struct ScopedTimer { |
| explicit ScopedTimer(base::TimeDelta* location) : location_(location) { |
| DCHECK(location_ != NULL); |
| timer_.Start(); |
| } |
| |
| ~ScopedTimer() { *location_ += timer_.Elapsed(); } |
| |
| base::ElapsedTimer timer_; |
| base::TimeDelta* location_; |
| }; |
| |
| // ---------------------------------------------------------------------------- |
| // Implementation of CompilationJob |
| |
| CompilationJob::CompilationJob(Isolate* isolate, CompilationInfo* info, |
| const char* compiler_name, State initial_state) |
| : info_(info), |
| isolate_thread_id_(isolate->thread_id()), |
| compiler_name_(compiler_name), |
| state_(initial_state), |
| stack_limit_(isolate->stack_guard()->real_climit()), |
| executed_on_background_thread_(false) {} |
| |
| CompilationJob::Status CompilationJob::PrepareJob() { |
| DCHECK(ThreadId::Current().Equals(info()->isolate()->thread_id())); |
| DisallowJavascriptExecution no_js(isolate()); |
| |
| if (FLAG_trace_opt && info()->IsOptimizing()) { |
| OFStream os(stdout); |
| os << "[compiling method " << Brief(*info()->closure()) << " using " |
| << compiler_name_; |
| if (info()->is_osr()) os << " OSR"; |
| os << "]" << std::endl; |
| } |
| |
| // Delegate to the underlying implementation. |
| DCHECK(state() == State::kReadyToPrepare); |
| ScopedTimer t(&time_taken_to_prepare_); |
| return UpdateState(PrepareJobImpl(), State::kReadyToExecute); |
| } |
| |
| CompilationJob::Status CompilationJob::ExecuteJob() { |
| std::unique_ptr<DisallowHeapAllocation> no_allocation; |
| std::unique_ptr<DisallowHandleAllocation> no_handles; |
| std::unique_ptr<DisallowHandleDereference> no_deref; |
| std::unique_ptr<DisallowCodeDependencyChange> no_dependency_change; |
| if (can_execute_on_background_thread()) { |
| no_allocation.reset(new DisallowHeapAllocation()); |
| no_handles.reset(new DisallowHandleAllocation()); |
| no_deref.reset(new DisallowHandleDereference()); |
| no_dependency_change.reset(new DisallowCodeDependencyChange()); |
| executed_on_background_thread_ = |
| !ThreadId::Current().Equals(isolate_thread_id_); |
| } else { |
| DCHECK(ThreadId::Current().Equals(isolate_thread_id_)); |
| } |
| |
| // Delegate to the underlying implementation. |
| DCHECK(state() == State::kReadyToExecute); |
| ScopedTimer t(&time_taken_to_execute_); |
| return UpdateState(ExecuteJobImpl(), State::kReadyToFinalize); |
| } |
| |
| CompilationJob::Status CompilationJob::FinalizeJob() { |
| DCHECK(ThreadId::Current().Equals(info()->isolate()->thread_id())); |
| DisallowCodeDependencyChange no_dependency_change; |
| DisallowJavascriptExecution no_js(isolate()); |
| DCHECK(!info()->dependencies()->HasAborted()); |
| |
| // Delegate to the underlying implementation. |
| DCHECK(state() == State::kReadyToFinalize); |
| ScopedTimer t(&time_taken_to_finalize_); |
| return UpdateState(FinalizeJobImpl(), State::kSucceeded); |
| } |
| |
| CompilationJob::Status CompilationJob::RetryOptimization(BailoutReason reason) { |
| DCHECK(info_->IsOptimizing()); |
| info_->RetryOptimization(reason); |
| state_ = State::kFailed; |
| return FAILED; |
| } |
| |
| CompilationJob::Status CompilationJob::AbortOptimization(BailoutReason reason) { |
| DCHECK(info_->IsOptimizing()); |
| info_->AbortOptimization(reason); |
| state_ = State::kFailed; |
| return FAILED; |
| } |
| |
| void CompilationJob::RecordUnoptimizedCompilationStats() const { |
| int code_size; |
| if (info()->has_bytecode_array()) { |
| code_size = info()->bytecode_array()->SizeIncludingMetadata(); |
| } else { |
| code_size = info()->code()->SizeIncludingMetadata(); |
| } |
| |
| Counters* counters = isolate()->counters(); |
| // TODO(4280): Rename counters from "baseline" to "unoptimized" eventually. |
| counters->total_baseline_code_size()->Increment(code_size); |
| counters->total_baseline_compile_count()->Increment(1); |
| |
| // TODO(5203): Add timers for each phase of compilation. |
| } |
| |
| void CompilationJob::RecordOptimizedCompilationStats() const { |
| DCHECK(info()->IsOptimizing()); |
| Handle<JSFunction> function = info()->closure(); |
| if (!function->IsOptimized()) { |
| // Concurrent recompilation and OSR may race. Increment only once. |
| int opt_count = function->shared()->opt_count(); |
| function->shared()->set_opt_count(opt_count + 1); |
| } |
| double ms_creategraph = time_taken_to_prepare_.InMillisecondsF(); |
| double ms_optimize = time_taken_to_execute_.InMillisecondsF(); |
| double ms_codegen = time_taken_to_finalize_.InMillisecondsF(); |
| if (FLAG_trace_opt) { |
| PrintF("[optimizing "); |
| function->ShortPrint(); |
| PrintF(" - took %0.3f, %0.3f, %0.3f ms]\n", ms_creategraph, ms_optimize, |
| ms_codegen); |
| } |
| if (FLAG_trace_opt_stats) { |
| static double compilation_time = 0.0; |
| static int compiled_functions = 0; |
| static int code_size = 0; |
| |
| compilation_time += (ms_creategraph + ms_optimize + ms_codegen); |
| compiled_functions++; |
| code_size += function->shared()->SourceSize(); |
| PrintF("Compiled: %d functions with %d byte source size in %fms.\n", |
| compiled_functions, code_size, compilation_time); |
| } |
| if (FLAG_hydrogen_stats) { |
| isolate()->GetHStatistics()->IncrementSubtotals(time_taken_to_prepare_, |
| time_taken_to_execute_, |
| time_taken_to_finalize_); |
| } |
| } |
| |
| Isolate* CompilationJob::isolate() const { return info()->isolate(); } |
| |
| namespace { |
| |
| void AddWeakObjectToCodeDependency(Isolate* isolate, Handle<HeapObject> object, |
| Handle<Code> code) { |
| Handle<WeakCell> cell = Code::WeakCellFor(code); |
| Heap* heap = isolate->heap(); |
| if (heap->InNewSpace(*object)) { |
| heap->AddWeakNewSpaceObjectToCodeDependency(object, cell); |
| } else { |
| Handle<DependentCode> dep(heap->LookupWeakObjectToCodeDependency(object)); |
| dep = |
| DependentCode::InsertWeakCode(dep, DependentCode::kWeakCodeGroup, cell); |
| heap->AddWeakObjectToCodeDependency(object, dep); |
| } |
| } |
| |
| } // namespace |
| |
| void CompilationJob::RegisterWeakObjectsInOptimizedCode(Handle<Code> code) { |
| // TODO(turbofan): Move this to pipeline.cc once Crankshaft dies. |
| Isolate* const isolate = code->GetIsolate(); |
| DCHECK(code->is_optimized_code()); |
| std::vector<Handle<Map>> maps; |
| std::vector<Handle<HeapObject>> objects; |
| { |
| DisallowHeapAllocation no_gc; |
| int const mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT) | |
| RelocInfo::ModeMask(RelocInfo::CELL); |
| for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) { |
| RelocInfo::Mode mode = it.rinfo()->rmode(); |
| if (mode == RelocInfo::CELL && |
| code->IsWeakObjectInOptimizedCode(it.rinfo()->target_cell())) { |
| objects.push_back(handle(it.rinfo()->target_cell(), isolate)); |
| } else if (mode == RelocInfo::EMBEDDED_OBJECT && |
| code->IsWeakObjectInOptimizedCode( |
| it.rinfo()->target_object())) { |
| Handle<HeapObject> object(HeapObject::cast(it.rinfo()->target_object()), |
| isolate); |
| if (object->IsMap()) { |
| maps.push_back(Handle<Map>::cast(object)); |
| } else { |
| objects.push_back(object); |
| } |
| } |
| } |
| } |
| for (Handle<Map> map : maps) { |
| if (map->dependent_code()->IsEmpty(DependentCode::kWeakCodeGroup)) { |
| isolate->heap()->AddRetainedMap(map); |
| } |
| Map::AddDependentCode(map, DependentCode::kWeakCodeGroup, code); |
| } |
| for (Handle<HeapObject> object : objects) { |
| AddWeakObjectToCodeDependency(isolate, object, code); |
| } |
| code->set_can_have_weak_objects(true); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // Local helper methods that make up the compilation pipeline. |
| |
| namespace { |
| |
| void RecordFunctionCompilation(CodeEventListener::LogEventsAndTags tag, |
| CompilationInfo* info) { |
| // Log the code generation. If source information is available include |
| // script name and line number. Check explicitly whether logging is |
| // enabled as finding the line number is not free. |
| if (info->isolate()->logger()->is_logging_code_events() || |
| info->isolate()->is_profiling()) { |
| Handle<SharedFunctionInfo> shared = info->shared_info(); |
| Handle<Script> script = info->parse_info()->script(); |
| Handle<AbstractCode> abstract_code = |
| info->has_bytecode_array() |
| ? Handle<AbstractCode>::cast(info->bytecode_array()) |
| : Handle<AbstractCode>::cast(info->code()); |
| if (abstract_code.is_identical_to( |
| info->isolate()->builtins()->CompileLazy())) { |
| return; |
| } |
| int line_num = Script::GetLineNumber(script, shared->start_position()) + 1; |
| int column_num = |
| Script::GetColumnNumber(script, shared->start_position()) + 1; |
| String* script_name = script->name()->IsString() |
| ? String::cast(script->name()) |
| : info->isolate()->heap()->empty_string(); |
| CodeEventListener::LogEventsAndTags log_tag = |
| Logger::ToNativeByScript(tag, *script); |
| PROFILE(info->isolate(), |
| CodeCreateEvent(log_tag, *abstract_code, *shared, script_name, |
| line_num, column_num)); |
| } |
| } |
| |
| void EnsureFeedbackMetadata(CompilationInfo* info) { |
| DCHECK(info->has_shared_info()); |
| |
| // If no type feedback metadata exists, we create it now. At this point the |
| // AstNumbering pass has already run. Note the snapshot can contain outdated |
| // vectors for a different configuration, hence we also recreate a new vector |
| // when the function is not compiled (i.e. no code was serialized). |
| |
| // TODO(mvstanton): reintroduce is_empty() predicate to feedback_metadata(). |
| if (info->shared_info()->feedback_metadata()->length() == 0 || |
| !info->shared_info()->is_compiled()) { |
| Handle<TypeFeedbackMetadata> feedback_metadata = TypeFeedbackMetadata::New( |
| info->isolate(), info->literal()->feedback_vector_spec()); |
| info->shared_info()->set_feedback_metadata(*feedback_metadata); |
| } |
| |
| // It's very important that recompiles do not alter the structure of the type |
| // feedback vector. Verify that the structure fits the function literal. |
| CHECK(!info->shared_info()->feedback_metadata()->SpecDiffersFrom( |
| info->literal()->feedback_vector_spec())); |
| } |
| |
| bool UseTurboFan(Handle<SharedFunctionInfo> shared) { |
| bool optimization_disabled = shared->optimization_disabled(); |
| bool must_use_ignition_turbo = shared->must_use_ignition_turbo(); |
| |
| // Check the enabling conditions for Turbofan. |
| // 1. "use asm" code. |
| bool is_turbofanable_asm = |
| FLAG_turbo_asm && shared->asm_function() && !optimization_disabled; |
| |
| // 2. Fallback for features unsupported by Crankshaft. |
| bool is_unsupported_by_crankshaft_but_turbofanable = |
| must_use_ignition_turbo && strcmp(FLAG_turbo_filter, "~~") == 0 && |
| !optimization_disabled; |
| |
| // 3. Explicitly enabled by the command-line filter. |
| bool passes_turbo_filter = shared->PassesFilter(FLAG_turbo_filter); |
| |
| return is_turbofanable_asm || is_unsupported_by_crankshaft_but_turbofanable || |
| passes_turbo_filter; |
| } |
| |
| bool ShouldUseIgnition(CompilationInfo* info) { |
| DCHECK(info->has_shared_info()); |
| Handle<SharedFunctionInfo> shared = info->shared_info(); |
| |
| // Code which can't be supported by the old pipeline should use Ignition. |
| if (shared->must_use_ignition_turbo()) return true; |
| |
| // Resumable functions are not supported by {FullCodeGenerator}, suspended |
| // activations stored as {JSGeneratorObject} on the heap always assume the |
| // underlying code to be based on the bytecode array. |
| DCHECK(!IsResumableFunction(shared->kind())); |
| |
| // Skip Ignition for asm.js functions. |
| if (shared->asm_function()) return false; |
| |
| // Skip Ignition for asm wasm code. |
| if (FLAG_validate_asm && shared->HasAsmWasmData()) { |
| return false; |
| } |
| |
| // When requesting debug code as a replacement for existing code, we provide |
| // the same kind as the existing code (to prevent implicit tier-change). |
| if (info->is_debug() && shared->is_compiled()) { |
| return !shared->HasBaselineCode(); |
| } |
| |
| // Code destined for TurboFan should be compiled with Ignition first. |
| if (UseTurboFan(shared)) return true; |
| |
| // Only use Ignition for any other function if FLAG_ignition is true. |
| if (!FLAG_ignition) return false; |
| |
| // Checks whether top level functions should be passed by the filter. |
| if (shared->is_toplevel()) { |
| Vector<const char> filter = CStrVector(FLAG_ignition_filter); |
| return (filter.length() == 0) || (filter.length() == 1 && filter[0] == '*'); |
| } |
| |
| // Finally respect the filter. |
| return shared->PassesFilter(FLAG_ignition_filter); |
| } |
| |
| CompilationJob* GetUnoptimizedCompilationJob(CompilationInfo* info) { |
| // Function should have been parsed and analyzed before creating a compilation |
| // job. |
| DCHECK_NOT_NULL(info->literal()); |
| DCHECK_NOT_NULL(info->scope()); |
| |
| EnsureFeedbackMetadata(info); |
| if (ShouldUseIgnition(info)) { |
| return interpreter::Interpreter::NewCompilationJob(info); |
| } else { |
| return FullCodeGenerator::NewCompilationJob(info); |
| } |
| } |
| |
| void InstallSharedScopeInfo(CompilationInfo* info, |
| Handle<SharedFunctionInfo> shared) { |
| Handle<ScopeInfo> scope_info = info->scope()->scope_info(); |
| shared->set_scope_info(*scope_info); |
| Scope* outer_scope = info->scope()->GetOuterScopeWithContext(); |
| if (outer_scope) { |
| shared->set_outer_scope_info(*outer_scope->scope_info()); |
| } |
| } |
| |
| void InstallSharedCompilationResult(CompilationInfo* info, |
| Handle<SharedFunctionInfo> shared) { |
| // TODO(mstarzinger): Compiling for debug code might be used to reveal inner |
| // functions via {FindSharedFunctionInfoInScript}, in which case we end up |
| // regenerating existing bytecode. Fix this! |
| if (info->is_debug() && info->has_bytecode_array()) { |
| shared->ClearBytecodeArray(); |
| } |
| DCHECK(!info->code().is_null()); |
| shared->ReplaceCode(*info->code()); |
| if (info->has_bytecode_array()) { |
| DCHECK(!shared->HasBytecodeArray()); // Only compiled once. |
| shared->set_bytecode_array(*info->bytecode_array()); |
| } |
| } |
| |
| void InstallUnoptimizedCode(CompilationInfo* info) { |
| Handle<SharedFunctionInfo> shared = info->shared_info(); |
| |
| // Update the shared function info with the scope info. |
| InstallSharedScopeInfo(info, shared); |
| |
| // Install compilation result on the shared function info |
| InstallSharedCompilationResult(info, shared); |
| } |
| |
| CompilationJob::Status FinalizeUnoptimizedCompilationJob(CompilationJob* job) { |
| CompilationJob::Status status = job->FinalizeJob(); |
| if (status == CompilationJob::SUCCEEDED) { |
| InstallUnoptimizedCode(job->info()); |
| job->RecordUnoptimizedCompilationStats(); |
| } |
| return status; |
| } |
| |
| bool Renumber(ParseInfo* parse_info, |
| Compiler::EagerInnerFunctionLiterals* eager_literals) { |
| RuntimeCallTimerScope runtimeTimer(parse_info->isolate(), |
| &RuntimeCallStats::CompileRenumber); |
| if (!AstNumbering::Renumber(parse_info->isolate(), parse_info->zone(), |
| parse_info->literal(), eager_literals)) { |
| return false; |
| } |
| Handle<SharedFunctionInfo> shared_info = parse_info->shared_info(); |
| if (!shared_info.is_null()) { |
| FunctionLiteral* lit = parse_info->literal(); |
| shared_info->set_ast_node_count(lit->ast_node_count()); |
| if (lit->dont_optimize_reason() != kNoReason) { |
| shared_info->DisableOptimization(lit->dont_optimize_reason()); |
| } |
| if (lit->flags() & AstProperties::kMustUseIgnitionTurbo) { |
| shared_info->set_must_use_ignition_turbo(true); |
| } |
| } |
| return true; |
| } |
| |
| bool GenerateUnoptimizedCode(CompilationInfo* info) { |
| if (FLAG_validate_asm && info->scope()->asm_module() && |
| !info->shared_info()->is_asm_wasm_broken() && !info->is_debug()) { |
| EnsureFeedbackMetadata(info); |
| MaybeHandle<FixedArray> wasm_data; |
| wasm_data = AsmJs::CompileAsmViaWasm(info); |
| if (!wasm_data.is_null()) { |
| info->shared_info()->set_asm_wasm_data(*wasm_data.ToHandleChecked()); |
| info->SetCode(info->isolate()->builtins()->InstantiateAsmJs()); |
| InstallUnoptimizedCode(info); |
| return true; |
| } |
| } |
| |
| std::unique_ptr<CompilationJob> job(GetUnoptimizedCompilationJob(info)); |
| if (job->PrepareJob() != CompilationJob::SUCCEEDED) return false; |
| if (job->ExecuteJob() != CompilationJob::SUCCEEDED) return false; |
| if (FinalizeUnoptimizedCompilationJob(job.get()) != |
| CompilationJob::SUCCEEDED) { |
| return false; |
| } |
| return true; |
| } |
| |
| bool CompileUnoptimizedInnerFunctionsRecursively( |
| ThreadedList<ThreadedListZoneEntry<FunctionLiteral*>>* literals, |
| CompilationInfo* outer_info) { |
| Isolate* isolate = outer_info->isolate(); |
| Handle<Script> script = outer_info->script(); |
| RuntimeCallTimerScope runtimeTimer(isolate, |
| &RuntimeCallStats::CompileInnerFunction); |
| |
| for (auto it : *literals) { |
| FunctionLiteral* literal = it->value(); |
| |
| // Find any previously allocated shared function info for the given literal. |
| Handle<SharedFunctionInfo> shared; |
| MaybeHandle<SharedFunctionInfo> maybe_existing = |
| script->FindSharedFunctionInfo(isolate, literal); |
| if (maybe_existing.ToHandle(&shared)) { |
| DCHECK(!shared->is_toplevel()); |
| // If we found an existing shared function info with compiled code, |
| // we are done. |
| if (shared->is_compiled()) continue; |
| } else { |
| shared = |
| isolate->factory()->NewSharedFunctionInfoForLiteral(literal, script); |
| shared->set_is_toplevel(false); |
| } |
| |
| Zone zone(isolate->allocator(), ZONE_NAME); |
| ParseInfo parse_info(&zone, script); |
| parse_info.set_literal(literal); |
| parse_info.set_shared_info(shared); |
| parse_info.set_function_literal_id(shared->function_literal_id()); |
| parse_info.set_language_mode(literal->scope()->language_mode()); |
| parse_info.set_ast_value_factory( |
| outer_info->parse_info()->ast_value_factory()); |
| parse_info.set_ast_value_factory_owned(false); |
| |
| CompilationInfo info(&parse_info, Handle<JSFunction>::null()); |
| if (outer_info->will_serialize()) info.PrepareForSerializing(); |
| if (outer_info->is_debug()) info.MarkAsDebug(); |
| |
| Compiler::EagerInnerFunctionLiterals inner_literals; |
| if (!Renumber(&parse_info, &inner_literals) || |
| !CompileUnoptimizedInnerFunctionsRecursively(&inner_literals, |
| outer_info) || |
| !GenerateUnoptimizedCode(&info)) { |
| if (!isolate->has_pending_exception()) isolate->StackOverflow(); |
| return false; |
| } |
| |
| DCHECK(!info.code().is_null()); |
| RecordFunctionCompilation(CodeEventListener::FUNCTION_TAG, &info); |
| if (literal->should_be_used_once_hint()) { |
| info.code()->MarkToBeExecutedOnce(isolate); |
| } |
| } |
| return true; |
| } |
| |
| bool CompileUnoptimizedCode(CompilationInfo* info) { |
| Isolate* isolate = info->isolate(); |
| DCHECK(AllowCompilation::IsAllowed(isolate)); |
| |
| Compiler::EagerInnerFunctionLiterals inner_literals; |
| if (!Compiler::Analyze(info->parse_info(), &inner_literals) || |
| !CompileUnoptimizedInnerFunctionsRecursively(&inner_literals, info) || |
| !GenerateUnoptimizedCode(info)) { |
| if (!isolate->has_pending_exception()) isolate->StackOverflow(); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void EnsureSharedFunctionInfosArrayOnScript(ParseInfo* info) { |
| DCHECK(info->is_toplevel()); |
| DCHECK(!info->script().is_null()); |
| if (info->script()->shared_function_infos()->length() > 0) { |
| DCHECK_EQ(info->script()->shared_function_infos()->length(), |
| info->max_function_literal_id() + 1); |
| return; |
| } |
| Isolate* isolate = info->isolate(); |
| Handle<FixedArray> infos( |
| isolate->factory()->NewFixedArray(info->max_function_literal_id() + 1)); |
| info->script()->set_shared_function_infos(*infos); |
| } |
| |
| MUST_USE_RESULT MaybeHandle<Code> GetUnoptimizedCode(CompilationInfo* info) { |
| RuntimeCallTimerScope runtimeTimer( |
| info->isolate(), &RuntimeCallStats::CompileGetUnoptimizedCode); |
| VMState<COMPILER> state(info->isolate()); |
| PostponeInterruptsScope postpone(info->isolate()); |
| |
| // Parse and update CompilationInfo with the results. |
| if (!parsing::ParseAny(info->parse_info())) return MaybeHandle<Code>(); |
| if (info->parse_info()->is_toplevel()) { |
| EnsureSharedFunctionInfosArrayOnScript(info->parse_info()); |
| } |
| DCHECK_EQ(info->shared_info()->language_mode(), |
| info->literal()->language_mode()); |
| |
| // Compile either unoptimized code or bytecode for the interpreter. |
| if (!CompileUnoptimizedCode(info)) return MaybeHandle<Code>(); |
| |
| // Record the function compilation event. |
| RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, info); |
| |
| return info->code(); |
| } |
| |
| MUST_USE_RESULT MaybeHandle<Code> GetCodeFromOptimizedCodeMap( |
| Handle<JSFunction> function, BailoutId osr_ast_id) { |
| RuntimeCallTimerScope runtimeTimer( |
| function->GetIsolate(), |
| &RuntimeCallStats::CompileGetFromOptimizedCodeMap); |
| Handle<SharedFunctionInfo> shared(function->shared()); |
| DisallowHeapAllocation no_gc; |
| Code* code = shared->SearchOptimizedCodeMap( |
| function->context()->native_context(), osr_ast_id); |
| if (code != nullptr) { |
| // Caching of optimized code enabled and optimized code found. |
| DCHECK(!code->marked_for_deoptimization()); |
| DCHECK(function->shared()->is_compiled()); |
| return Handle<Code>(code); |
| } |
| return MaybeHandle<Code>(); |
| } |
| |
| void InsertCodeIntoOptimizedCodeMap(CompilationInfo* info) { |
| Handle<Code> code = info->code(); |
| if (code->kind() != Code::OPTIMIZED_FUNCTION) return; // Nothing to do. |
| |
| // Function context specialization folds-in the function context, |
| // so no sharing can occur. |
| if (info->is_function_context_specializing()) return; |
| // Frame specialization implies function context specialization. |
| DCHECK(!info->is_frame_specializing()); |
| |
| // TODO(4764): When compiling for OSR from bytecode, BailoutId might derive |
| // from bytecode offset and overlap with actual BailoutId. No caching! |
| if (info->is_osr() && info->is_optimizing_from_bytecode()) return; |
| |
| // Cache optimized context-specific code. |
| Handle<JSFunction> function = info->closure(); |
| Handle<SharedFunctionInfo> shared(function->shared()); |
| Handle<Context> native_context(function->context()->native_context()); |
| SharedFunctionInfo::AddToOptimizedCodeMap(shared, native_context, code, |
| info->osr_ast_id()); |
| } |
| |
| bool GetOptimizedCodeNow(CompilationJob* job) { |
| CompilationInfo* info = job->info(); |
| Isolate* isolate = info->isolate(); |
| |
| // Parsing is not required when optimizing from existing bytecode. |
| if (!info->is_optimizing_from_bytecode()) { |
| if (!Compiler::ParseAndAnalyze(info->parse_info())) return false; |
| EnsureFeedbackMetadata(info); |
| } |
| |
| JSFunction::EnsureLiterals(info->closure()); |
| |
| TimerEventScope<TimerEventRecompileSynchronous> timer(isolate); |
| RuntimeCallTimerScope runtimeTimer(isolate, |
| &RuntimeCallStats::RecompileSynchronous); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), |
| "V8.RecompileSynchronous"); |
| |
| if (job->PrepareJob() != CompilationJob::SUCCEEDED || |
| job->ExecuteJob() != CompilationJob::SUCCEEDED || |
| job->FinalizeJob() != CompilationJob::SUCCEEDED) { |
| if (FLAG_trace_opt) { |
| PrintF("[aborted optimizing "); |
| info->closure()->ShortPrint(); |
| PrintF(" because: %s]\n", GetBailoutReason(info->bailout_reason())); |
| } |
| return false; |
| } |
| |
| // Success! |
| job->RecordOptimizedCompilationStats(); |
| DCHECK(!isolate->has_pending_exception()); |
| InsertCodeIntoOptimizedCodeMap(info); |
| RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, info); |
| return true; |
| } |
| |
| bool GetOptimizedCodeLater(CompilationJob* job) { |
| CompilationInfo* info = job->info(); |
| Isolate* isolate = info->isolate(); |
| |
| if (!isolate->optimizing_compile_dispatcher()->IsQueueAvailable()) { |
| if (FLAG_trace_concurrent_recompilation) { |
| PrintF(" ** Compilation queue full, will retry optimizing "); |
| info->closure()->ShortPrint(); |
| PrintF(" later.\n"); |
| } |
| return false; |
| } |
| |
| if (isolate->heap()->HighMemoryPressure()) { |
| if (FLAG_trace_concurrent_recompilation) { |
| PrintF(" ** High memory pressure, will retry optimizing "); |
| info->closure()->ShortPrint(); |
| PrintF(" later.\n"); |
| } |
| return false; |
| } |
| |
| // Parsing is not required when optimizing from existing bytecode. |
| if (!info->is_optimizing_from_bytecode()) { |
| if (!Compiler::ParseAndAnalyze(info->parse_info())) return false; |
| EnsureFeedbackMetadata(info); |
| } |
| |
| JSFunction::EnsureLiterals(info->closure()); |
| |
| TimerEventScope<TimerEventRecompileSynchronous> timer(info->isolate()); |
| RuntimeCallTimerScope runtimeTimer(info->isolate(), |
| &RuntimeCallStats::RecompileSynchronous); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), |
| "V8.RecompileSynchronous"); |
| |
| if (job->PrepareJob() != CompilationJob::SUCCEEDED) return false; |
| isolate->optimizing_compile_dispatcher()->QueueForOptimization(job); |
| |
| if (FLAG_trace_concurrent_recompilation) { |
| PrintF(" ** Queued "); |
| info->closure()->ShortPrint(); |
| PrintF(" for concurrent optimization.\n"); |
| } |
| return true; |
| } |
| |
| MaybeHandle<Code> GetOptimizedCode(Handle<JSFunction> function, |
| Compiler::ConcurrencyMode mode, |
| BailoutId osr_ast_id = BailoutId::None(), |
| JavaScriptFrame* osr_frame = nullptr) { |
| Isolate* isolate = function->GetIsolate(); |
| Handle<SharedFunctionInfo> shared(function->shared(), isolate); |
| |
| bool ignition_osr = osr_frame && osr_frame->is_interpreted(); |
| DCHECK_IMPLIES(ignition_osr, !osr_ast_id.IsNone()); |
| DCHECK_IMPLIES(ignition_osr, FLAG_ignition_osr); |
| |
| // Shared function no longer needs to be tiered up |
| shared->set_marked_for_tier_up(false); |
| |
| Handle<Code> cached_code; |
| // TODO(4764): When compiling for OSR from bytecode, BailoutId might derive |
| // from bytecode offset and overlap with actual BailoutId. No lookup! |
| if (!ignition_osr && |
| GetCodeFromOptimizedCodeMap(function, osr_ast_id) |
| .ToHandle(&cached_code)) { |
| if (FLAG_trace_opt) { |
| PrintF("[found optimized code for "); |
| function->ShortPrint(); |
| if (!osr_ast_id.IsNone()) { |
| PrintF(" at OSR AST id %d", osr_ast_id.ToInt()); |
| } |
| PrintF("]\n"); |
| } |
| return cached_code; |
| } |
| |
| // Reset profiler ticks, function is no longer considered hot. |
| DCHECK(shared->is_compiled()); |
| if (shared->HasBaselineCode()) { |
| shared->code()->set_profiler_ticks(0); |
| } else if (shared->HasBytecodeArray()) { |
| shared->set_profiler_ticks(0); |
| } |
| |
| VMState<COMPILER> state(isolate); |
| DCHECK(!isolate->has_pending_exception()); |
| PostponeInterruptsScope postpone(isolate); |
| bool use_turbofan = UseTurboFan(shared) || ignition_osr; |
| std::unique_ptr<CompilationJob> job( |
| use_turbofan ? compiler::Pipeline::NewCompilationJob(function) |
| : new HCompilationJob(function)); |
| CompilationInfo* info = job->info(); |
| ParseInfo* parse_info = info->parse_info(); |
| |
| info->SetOptimizingForOsr(osr_ast_id, osr_frame); |
| |
| // Do not use Crankshaft/TurboFan if we need to be able to set break points. |
| if (info->shared_info()->HasDebugInfo()) { |
| info->AbortOptimization(kFunctionBeingDebugged); |
| return MaybeHandle<Code>(); |
| } |
| |
| // Limit the number of times we try to optimize functions. |
| const int kMaxOptCount = |
| FLAG_deopt_every_n_times == 0 ? FLAG_max_opt_count : 1000; |
| if (info->shared_info()->opt_count() > kMaxOptCount) { |
| info->AbortOptimization(kDeoptimizedTooManyTimes); |
| return MaybeHandle<Code>(); |
| } |
| |
| TimerEventScope<TimerEventOptimizeCode> optimize_code_timer(isolate); |
| RuntimeCallTimerScope runtimeTimer(isolate, &RuntimeCallStats::OptimizeCode); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.OptimizeCode"); |
| |
| // TurboFan can optimize directly from existing bytecode. |
| if (use_turbofan && ShouldUseIgnition(info)) { |
| if (info->is_osr() && !ignition_osr) return MaybeHandle<Code>(); |
| DCHECK(shared->HasBytecodeArray()); |
| info->MarkAsOptimizeFromBytecode(); |
| } |
| |
| // Verify that OSR compilations are delegated to the correct graph builder. |
| // Depending on the underlying frame the semantics of the {BailoutId} differ |
| // and the various graph builders hard-code a certain semantic: |
| // - Interpreter : The BailoutId represents a bytecode offset. |
| // - FullCodegen : The BailoutId represents the id of an AST node. |
| DCHECK_IMPLIES(info->is_osr() && ignition_osr, |
| info->is_optimizing_from_bytecode()); |
| DCHECK_IMPLIES(info->is_osr() && !ignition_osr, |
| !info->is_optimizing_from_bytecode()); |
| |
| // In case of concurrent recompilation, all handles below this point will be |
| // allocated in a deferred handle scope that is detached and handed off to |
| // the background thread when we return. |
| std::unique_ptr<CompilationHandleScope> compilation; |
| if (mode == Compiler::CONCURRENT) { |
| compilation.reset(new CompilationHandleScope(info)); |
| } |
| |
| // In case of TurboFan, all handles below will be canonicalized. |
| std::unique_ptr<CanonicalHandleScope> canonical; |
| if (use_turbofan) canonical.reset(new CanonicalHandleScope(info->isolate())); |
| |
| // Reopen handles in the new CompilationHandleScope. |
| info->ReopenHandlesInNewHandleScope(); |
| parse_info->ReopenHandlesInNewHandleScope(); |
| |
| if (mode == Compiler::CONCURRENT) { |
| if (GetOptimizedCodeLater(job.get())) { |
| job.release(); // The background recompile job owns this now. |
| return isolate->builtins()->InOptimizationQueue(); |
| } |
| } else { |
| if (GetOptimizedCodeNow(job.get())) return info->code(); |
| } |
| |
| if (isolate->has_pending_exception()) isolate->clear_pending_exception(); |
| return MaybeHandle<Code>(); |
| } |
| |
| CompilationJob::Status FinalizeOptimizedCompilationJob(CompilationJob* job) { |
| CompilationInfo* info = job->info(); |
| Isolate* isolate = info->isolate(); |
| |
| TimerEventScope<TimerEventRecompileSynchronous> timer(info->isolate()); |
| RuntimeCallTimerScope runtimeTimer(isolate, |
| &RuntimeCallStats::RecompileSynchronous); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), |
| "V8.RecompileSynchronous"); |
| |
| Handle<SharedFunctionInfo> shared = info->shared_info(); |
| |
| // Reset profiler ticks, function is no longer considered hot. |
| if (shared->HasBaselineCode()) { |
| shared->code()->set_profiler_ticks(0); |
| } else if (shared->HasBytecodeArray()) { |
| shared->set_profiler_ticks(0); |
| } |
| |
| DCHECK(!shared->HasDebugInfo()); |
| |
| // 1) Optimization on the concurrent thread may have failed. |
| // 2) The function may have already been optimized by OSR. Simply continue. |
| // Except when OSR already disabled optimization for some reason. |
| // 3) The code may have already been invalidated due to dependency change. |
| // 4) Code generation may have failed. |
| if (job->state() == CompilationJob::State::kReadyToFinalize) { |
| if (shared->optimization_disabled()) { |
| job->RetryOptimization(kOptimizationDisabled); |
| } else if (info->dependencies()->HasAborted()) { |
| job->RetryOptimization(kBailedOutDueToDependencyChange); |
| } else if (job->FinalizeJob() == CompilationJob::SUCCEEDED) { |
| job->RecordOptimizedCompilationStats(); |
| RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, info); |
| if (shared->SearchOptimizedCodeMap(info->context()->native_context(), |
| info->osr_ast_id()) == nullptr) { |
| InsertCodeIntoOptimizedCodeMap(info); |
| } |
| if (FLAG_trace_opt) { |
| PrintF("[completed optimizing "); |
| info->closure()->ShortPrint(); |
| PrintF("]\n"); |
| } |
| info->closure()->ReplaceCode(*info->code()); |
| return CompilationJob::SUCCEEDED; |
| } |
| } |
| |
| DCHECK(job->state() == CompilationJob::State::kFailed); |
| if (FLAG_trace_opt) { |
| PrintF("[aborted optimizing "); |
| info->closure()->ShortPrint(); |
| PrintF(" because: %s]\n", GetBailoutReason(info->bailout_reason())); |
| } |
| info->closure()->ReplaceCode(shared->code()); |
| return CompilationJob::FAILED; |
| } |
| |
| MaybeHandle<Code> GetBaselineCode(Handle<JSFunction> function) { |
| Isolate* isolate = function->GetIsolate(); |
| VMState<COMPILER> state(isolate); |
| PostponeInterruptsScope postpone(isolate); |
| Zone zone(isolate->allocator(), ZONE_NAME); |
| ParseInfo parse_info(&zone, handle(function->shared())); |
| CompilationInfo info(&parse_info, function); |
| |
| DCHECK(function->shared()->is_compiled()); |
| |
| // Function no longer needs to be tiered up |
| function->shared()->set_marked_for_tier_up(false); |
| |
| // Reset profiler ticks, function is no longer considered hot. |
| if (function->shared()->HasBytecodeArray()) { |
| function->shared()->set_profiler_ticks(0); |
| } |
| |
| // Nothing left to do if the function already has baseline code. |
| if (function->shared()->code()->kind() == Code::FUNCTION) { |
| return Handle<Code>(function->shared()->code()); |
| } |
| |
| // We do not switch to baseline code when the debugger might have created a |
| // copy of the bytecode with break slots to be able to set break points. |
| if (function->shared()->HasDebugInfo()) { |
| return MaybeHandle<Code>(); |
| } |
| |
| // Don't generate full-codegen code for functions it can't support. |
| if (function->shared()->must_use_ignition_turbo()) { |
| return MaybeHandle<Code>(); |
| } |
| DCHECK(!IsResumableFunction(function->shared()->kind())); |
| |
| if (FLAG_trace_opt) { |
| OFStream os(stdout); |
| os << "[switching method " << Brief(*function) << " to baseline code]" |
| << std::endl; |
| } |
| |
| // Parse and update CompilationInfo with the results. |
| if (!parsing::ParseFunction(info.parse_info())) return MaybeHandle<Code>(); |
| Handle<SharedFunctionInfo> shared = info.shared_info(); |
| DCHECK_EQ(shared->language_mode(), info.literal()->language_mode()); |
| |
| // Compile baseline code using the full code generator. |
| if (!Compiler::Analyze(info.parse_info()) || |
| !FullCodeGenerator::MakeCode(&info)) { |
| if (!isolate->has_pending_exception()) isolate->StackOverflow(); |
| return MaybeHandle<Code>(); |
| } |
| |
| // Update the shared function info with the scope info. |
| InstallSharedScopeInfo(&info, shared); |
| |
| // Install compilation result on the shared function info |
| InstallSharedCompilationResult(&info, shared); |
| |
| // Record the function compilation event. |
| RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, &info); |
| |
| return info.code(); |
| } |
| |
| MaybeHandle<Code> GetLazyCode(Handle<JSFunction> function) { |
| Isolate* isolate = function->GetIsolate(); |
| DCHECK(!isolate->has_pending_exception()); |
| DCHECK(!function->is_compiled()); |
| TimerEventScope<TimerEventCompileCode> compile_timer(isolate); |
| RuntimeCallTimerScope runtimeTimer(isolate, |
| &RuntimeCallStats::CompileFunction); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.CompileCode"); |
| AggregatedHistogramTimerScope timer(isolate->counters()->compile_lazy()); |
| |
| Handle<Code> cached_code; |
| if (GetCodeFromOptimizedCodeMap(function, BailoutId::None()) |
| .ToHandle(&cached_code)) { |
| if (FLAG_trace_opt) { |
| PrintF("[found optimized code for "); |
| function->ShortPrint(); |
| PrintF(" during unoptimized compile]\n"); |
| } |
| DCHECK(function->shared()->is_compiled()); |
| return cached_code; |
| } |
| |
| if (function->shared()->is_compiled() && |
| function->shared()->marked_for_tier_up()) { |
| DCHECK(FLAG_mark_shared_functions_for_tier_up); |
| |
| function->shared()->set_marked_for_tier_up(false); |
| |
| switch (Compiler::NextCompilationTier(*function)) { |
| case Compiler::BASELINE: { |
| if (FLAG_trace_opt) { |
| PrintF("[recompiling function "); |
| function->ShortPrint(); |
| PrintF( |
| " to baseline eagerly (shared function marked for tier up)]\n"); |
| } |
| |
| Handle<Code> code; |
| if (GetBaselineCode(function).ToHandle(&code)) { |
| return code; |
| } |
| break; |
| } |
| case Compiler::OPTIMIZED: { |
| if (FLAG_trace_opt) { |
| PrintF("[optimizing method "); |
| function->ShortPrint(); |
| PrintF(" eagerly (shared function marked for tier up)]\n"); |
| } |
| |
| Handle<Code> code; |
| // TODO(leszeks): Look into performing this compilation concurrently. |
| if (GetOptimizedCode(function, Compiler::NOT_CONCURRENT) |
| .ToHandle(&code)) { |
| return code; |
| } |
| break; |
| } |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| if (function->shared()->is_compiled()) { |
| return Handle<Code>(function->shared()->code()); |
| } |
| |
| if (function->shared()->HasBytecodeArray()) { |
| Handle<Code> entry = isolate->builtins()->InterpreterEntryTrampoline(); |
| function->shared()->ReplaceCode(*entry); |
| return entry; |
| } |
| |
| Zone zone(isolate->allocator(), ZONE_NAME); |
| ParseInfo parse_info(&zone, handle(function->shared())); |
| CompilationInfo info(&parse_info, function); |
| Handle<Code> result; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, result, GetUnoptimizedCode(&info), Code); |
| |
| if (FLAG_always_opt && !info.shared_info()->HasAsmWasmData()) { |
| Handle<Code> opt_code; |
| if (GetOptimizedCode(function, Compiler::NOT_CONCURRENT) |
| .ToHandle(&opt_code)) { |
| result = opt_code; |
| } |
| } |
| |
| return result; |
| } |
| |
| |
| Handle<SharedFunctionInfo> CompileToplevel(CompilationInfo* info) { |
| Isolate* isolate = info->isolate(); |
| TimerEventScope<TimerEventCompileCode> timer(isolate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.CompileCode"); |
| PostponeInterruptsScope postpone(isolate); |
| DCHECK(!isolate->native_context().is_null()); |
| ParseInfo* parse_info = info->parse_info(); |
| |
| RuntimeCallTimerScope runtimeTimer( |
| isolate, parse_info->is_eval() ? &RuntimeCallStats::CompileEval |
| : &RuntimeCallStats::CompileScript); |
| |
| Handle<Script> script = parse_info->script(); |
| |
| // TODO(svenpanne) Obscure place for this, perhaps move to OnBeforeCompile? |
| FixedArray* array = isolate->native_context()->embedder_data(); |
| script->set_context_data(array->get(v8::Context::kDebugIdIndex)); |
| |
| Handle<SharedFunctionInfo> result; |
| |
| { VMState<COMPILER> state(info->isolate()); |
| if (parse_info->literal() == nullptr && |
| !parsing::ParseProgram(parse_info)) { |
| return Handle<SharedFunctionInfo>::null(); |
| } |
| |
| EnsureSharedFunctionInfosArrayOnScript(parse_info); |
| |
| // Measure how long it takes to do the compilation; only take the |
| // rest of the function into account to avoid overlap with the |
| // parsing statistics. |
| HistogramTimer* rate = parse_info->is_eval() |
| ? info->isolate()->counters()->compile_eval() |
| : info->isolate()->counters()->compile(); |
| HistogramTimerScope timer(rate); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), |
| parse_info->is_eval() ? "V8.CompileEval" : "V8.Compile"); |
| |
| // Allocate a shared function info object. |
| FunctionLiteral* lit = parse_info->literal(); |
| DCHECK_EQ(kNoSourcePosition, lit->function_token_position()); |
| result = isolate->factory()->NewSharedFunctionInfoForLiteral(lit, script); |
| result->set_is_toplevel(true); |
| parse_info->set_shared_info(result); |
| parse_info->set_function_literal_id(result->function_literal_id()); |
| |
| // Compile the code. |
| if (!CompileUnoptimizedCode(info)) { |
| return Handle<SharedFunctionInfo>::null(); |
| } |
| |
| Handle<String> script_name = |
| script->name()->IsString() |
| ? Handle<String>(String::cast(script->name())) |
| : isolate->factory()->empty_string(); |
| CodeEventListener::LogEventsAndTags log_tag = |
| parse_info->is_eval() |
| ? CodeEventListener::EVAL_TAG |
| : Logger::ToNativeByScript(CodeEventListener::SCRIPT_TAG, *script); |
| |
| PROFILE(isolate, CodeCreateEvent(log_tag, result->abstract_code(), *result, |
| *script_name)); |
| |
| if (!script.is_null()) |
| script->set_compilation_state(Script::COMPILATION_STATE_COMPILED); |
| } |
| |
| return result; |
| } |
| |
| } // namespace |
| |
| // ---------------------------------------------------------------------------- |
| // Implementation of Compiler |
| |
| bool Compiler::Analyze(ParseInfo* info, |
| EagerInnerFunctionLiterals* eager_literals) { |
| DCHECK_NOT_NULL(info->literal()); |
| RuntimeCallTimerScope runtimeTimer(info->isolate(), |
| &RuntimeCallStats::CompileAnalyse); |
| if (!Rewriter::Rewrite(info)) return false; |
| DeclarationScope::Analyze(info, AnalyzeMode::kRegular); |
| if (!Renumber(info, eager_literals)) return false; |
| DCHECK_NOT_NULL(info->scope()); |
| return true; |
| } |
| |
| bool Compiler::ParseAndAnalyze(ParseInfo* info) { |
| if (!parsing::ParseAny(info)) return false; |
| if (info->is_toplevel()) EnsureSharedFunctionInfosArrayOnScript(info); |
| if (!Compiler::Analyze(info)) return false; |
| DCHECK_NOT_NULL(info->literal()); |
| DCHECK_NOT_NULL(info->scope()); |
| return true; |
| } |
| |
| bool Compiler::Compile(Handle<JSFunction> function, ClearExceptionFlag flag) { |
| if (function->is_compiled()) return true; |
| Isolate* isolate = function->GetIsolate(); |
| DCHECK(AllowCompilation::IsAllowed(isolate)); |
| |
| // Start a compilation. |
| Handle<Code> code; |
| if (!GetLazyCode(function).ToHandle(&code)) { |
| if (flag == CLEAR_EXCEPTION) { |
| isolate->clear_pending_exception(); |
| } |
| return false; |
| } |
| |
| // Install code on closure. |
| function->ReplaceCode(*code); |
| JSFunction::EnsureLiterals(function); |
| |
| // Check postconditions on success. |
| DCHECK(!isolate->has_pending_exception()); |
| DCHECK(function->shared()->is_compiled()); |
| DCHECK(function->is_compiled()); |
| return true; |
| } |
| |
| bool Compiler::CompileBaseline(Handle<JSFunction> function) { |
| Isolate* isolate = function->GetIsolate(); |
| DCHECK(AllowCompilation::IsAllowed(isolate)); |
| |
| // Start a compilation. |
| Handle<Code> code; |
| if (!GetBaselineCode(function).ToHandle(&code)) { |
| // Baseline generation failed, get unoptimized code. |
| DCHECK(function->shared()->is_compiled()); |
| code = handle(function->shared()->code()); |
| isolate->clear_pending_exception(); |
| } |
| |
| // Install code on closure. |
| function->ReplaceCode(*code); |
| JSFunction::EnsureLiterals(function); |
| |
| // Check postconditions on success. |
| DCHECK(!isolate->has_pending_exception()); |
| DCHECK(function->shared()->is_compiled()); |
| DCHECK(function->is_compiled()); |
| return true; |
| } |
| |
| bool Compiler::CompileOptimized(Handle<JSFunction> function, |
| ConcurrencyMode mode) { |
| if (function->IsOptimized()) return true; |
| Isolate* isolate = function->GetIsolate(); |
| DCHECK(AllowCompilation::IsAllowed(isolate)); |
| |
| // Start a compilation. |
| Handle<Code> code; |
| if (!GetOptimizedCode(function, mode).ToHandle(&code)) { |
| // Optimization failed, get unoptimized code. |
| DCHECK(!isolate->has_pending_exception()); |
| if (function->shared()->is_compiled()) { |
| code = handle(function->shared()->code(), isolate); |
| } else if (function->shared()->HasBytecodeArray()) { |
| code = isolate->builtins()->InterpreterEntryTrampoline(); |
| function->shared()->ReplaceCode(*code); |
| } else { |
| Zone zone(isolate->allocator(), ZONE_NAME); |
| ParseInfo parse_info(&zone, handle(function->shared())); |
| CompilationInfo info(&parse_info, function); |
| if (!GetUnoptimizedCode(&info).ToHandle(&code)) { |
| return false; |
| } |
| } |
| } |
| |
| // Install code on closure. |
| function->ReplaceCode(*code); |
| JSFunction::EnsureLiterals(function); |
| |
| // Check postconditions on success. |
| DCHECK(!isolate->has_pending_exception()); |
| DCHECK(function->shared()->is_compiled()); |
| DCHECK(function->is_compiled()); |
| return true; |
| } |
| |
| bool Compiler::CompileDebugCode(Handle<SharedFunctionInfo> shared) { |
| Isolate* isolate = shared->GetIsolate(); |
| DCHECK(AllowCompilation::IsAllowed(isolate)); |
| |
| // Start a compilation. |
| Zone zone(isolate->allocator(), ZONE_NAME); |
| ParseInfo parse_info(&zone, shared); |
| CompilationInfo info(&parse_info, Handle<JSFunction>::null()); |
| info.MarkAsDebug(); |
| if (GetUnoptimizedCode(&info).is_null()) { |
| isolate->clear_pending_exception(); |
| return false; |
| } |
| |
| // Check postconditions on success. |
| DCHECK(!isolate->has_pending_exception()); |
| DCHECK(shared->is_compiled()); |
| DCHECK(shared->HasDebugCode()); |
| return true; |
| } |
| |
| MaybeHandle<JSArray> Compiler::CompileForLiveEdit(Handle<Script> script) { |
| Isolate* isolate = script->GetIsolate(); |
| DCHECK(AllowCompilation::IsAllowed(isolate)); |
| |
| // In order to ensure that live edit function info collection finds the newly |
| // generated shared function infos, clear the script's list temporarily |
| // and restore it at the end of this method. |
| Handle<FixedArray> old_function_infos(script->shared_function_infos(), |
| isolate); |
| script->set_shared_function_infos(isolate->heap()->empty_fixed_array()); |
| |
| // Start a compilation. |
| Zone zone(isolate->allocator(), ZONE_NAME); |
| ParseInfo parse_info(&zone, script); |
| CompilationInfo info(&parse_info, Handle<JSFunction>::null()); |
| info.MarkAsDebug(); |
| |
| // TODO(635): support extensions. |
| const bool compilation_succeeded = !CompileToplevel(&info).is_null(); |
| Handle<JSArray> infos; |
| if (compilation_succeeded) { |
| // Check postconditions on success. |
| DCHECK(!isolate->has_pending_exception()); |
| infos = LiveEditFunctionTracker::Collect(parse_info.literal(), script, |
| &zone, isolate); |
| } |
| |
| // Restore the original function info list in order to remain side-effect |
| // free as much as possible, since some code expects the old shared function |
| // infos to stick around. |
| script->set_shared_function_infos(*old_function_infos); |
| |
| return infos; |
| } |
| |
| bool Compiler::EnsureBytecode(CompilationInfo* info) { |
| if (!info->shared_info()->is_compiled()) { |
| if (GetUnoptimizedCode(info).is_null()) return false; |
| } |
| DCHECK(info->shared_info()->is_compiled()); |
| |
| if (info->shared_info()->HasAsmWasmData()) return false; |
| |
| DCHECK_EQ(ShouldUseIgnition(info), info->shared_info()->HasBytecodeArray()); |
| return info->shared_info()->HasBytecodeArray(); |
| } |
| |
| // TODO(turbofan): In the future, unoptimized code with deopt support could |
| // be generated lazily once deopt is triggered. |
| bool Compiler::EnsureDeoptimizationSupport(CompilationInfo* info) { |
| DCHECK_NOT_NULL(info->literal()); |
| DCHECK_NOT_NULL(info->scope()); |
| Handle<SharedFunctionInfo> shared = info->shared_info(); |
| if (!shared->has_deoptimization_support()) { |
| Zone zone(info->isolate()->allocator(), ZONE_NAME); |
| CompilationInfo unoptimized(info->parse_info(), info->closure()); |
| unoptimized.EnableDeoptimizationSupport(); |
| |
| // Don't generate full-codegen code for functions it can't support. |
| if (shared->must_use_ignition_turbo()) return false; |
| DCHECK(!IsResumableFunction(shared->kind())); |
| |
| // When we call PrepareForSerializing below, we will change the shared |
| // ParseInfo. Make sure to reset it. |
| bool old_will_serialize_value = info->parse_info()->will_serialize(); |
| |
| // If the current code has reloc info for serialization, also include |
| // reloc info for serialization for the new code, so that deopt support |
| // can be added without losing IC state. |
| if (shared->code()->kind() == Code::FUNCTION && |
| shared->code()->has_reloc_info_for_serialization()) { |
| unoptimized.PrepareForSerializing(); |
| } |
| EnsureFeedbackMetadata(&unoptimized); |
| |
| // Ensure we generate and install bytecode first if the function should use |
| // Ignition to avoid implicit tier-down. |
| if (!shared->is_compiled() && ShouldUseIgnition(info) && |
| !GenerateUnoptimizedCode(info)) { |
| return false; |
| } |
| |
| if (!FullCodeGenerator::MakeCode(&unoptimized)) return false; |
| |
| info->parse_info()->set_will_serialize(old_will_serialize_value); |
| |
| // The scope info might not have been set if a lazily compiled |
| // function is inlined before being called for the first time. |
| if (shared->scope_info() == ScopeInfo::Empty(info->isolate())) { |
| InstallSharedScopeInfo(info, shared); |
| } |
| |
| // Install compilation result on the shared function info |
| shared->EnableDeoptimizationSupport(*unoptimized.code()); |
| |
| // The existing unoptimized code was replaced with the new one. |
| RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, |
| &unoptimized); |
| } |
| return true; |
| } |
| |
| // static |
| Compiler::CompilationTier Compiler::NextCompilationTier(JSFunction* function) { |
| Handle<SharedFunctionInfo> shared(function->shared(), function->GetIsolate()); |
| if (shared->IsInterpreted()) { |
| if (UseTurboFan(shared)) { |
| return OPTIMIZED; |
| } else { |
| return BASELINE; |
| } |
| } else { |
| return OPTIMIZED; |
| } |
| } |
| |
| MaybeHandle<JSFunction> Compiler::GetFunctionFromEval( |
| Handle<String> source, Handle<SharedFunctionInfo> outer_info, |
| Handle<Context> context, LanguageMode language_mode, |
| ParseRestriction restriction, int eval_scope_position, int eval_position, |
| int line_offset, int column_offset, Handle<Object> script_name, |
| ScriptOriginOptions options) { |
| Isolate* isolate = source->GetIsolate(); |
| int source_length = source->length(); |
| isolate->counters()->total_eval_size()->Increment(source_length); |
| isolate->counters()->total_compile_size()->Increment(source_length); |
| |
| CompilationCache* compilation_cache = isolate->compilation_cache(); |
| MaybeHandle<SharedFunctionInfo> maybe_shared_info = |
| compilation_cache->LookupEval(source, outer_info, context, language_mode, |
| eval_scope_position); |
| Handle<SharedFunctionInfo> shared_info; |
| |
| Handle<Script> script; |
| if (!maybe_shared_info.ToHandle(&shared_info)) { |
| script = isolate->factory()->NewScript(source); |
| if (isolate->NeedsSourcePositionsForProfiling()) { |
| Script::InitLineEnds(script); |
| } |
| if (!script_name.is_null()) { |
| script->set_name(*script_name); |
| script->set_line_offset(line_offset); |
| script->set_column_offset(column_offset); |
| } |
| script->set_origin_options(options); |
| script->set_compilation_type(Script::COMPILATION_TYPE_EVAL); |
| Script::SetEvalOrigin(script, outer_info, eval_position); |
| |
| Zone zone(isolate->allocator(), ZONE_NAME); |
| ParseInfo parse_info(&zone, script); |
| CompilationInfo info(&parse_info, Handle<JSFunction>::null()); |
| parse_info.set_eval(); |
| parse_info.set_language_mode(language_mode); |
| parse_info.set_parse_restriction(restriction); |
| if (!context->IsNativeContext()) { |
| parse_info.set_outer_scope_info(handle(context->scope_info())); |
| } |
| |
| shared_info = CompileToplevel(&info); |
| |
| if (shared_info.is_null()) { |
| return MaybeHandle<JSFunction>(); |
| } else { |
| // If caller is strict mode, the result must be in strict mode as well. |
| DCHECK(is_sloppy(language_mode) || |
| is_strict(shared_info->language_mode())); |
| compilation_cache->PutEval(source, outer_info, context, shared_info, |
| eval_scope_position); |
| } |
| } |
| |
| Handle<JSFunction> result = |
| isolate->factory()->NewFunctionFromSharedFunctionInfo( |
| shared_info, context, NOT_TENURED); |
| |
| // OnAfterCompile has to be called after we create the JSFunction, which we |
| // may require to recompile the eval for debugging, if we find a function |
| // that contains break points in the eval script. |
| isolate->debug()->OnAfterCompile(script); |
| |
| return result; |
| } |
| |
| namespace { |
| |
| bool CodeGenerationFromStringsAllowed(Isolate* isolate, |
| Handle<Context> context) { |
| DCHECK(context->allow_code_gen_from_strings()->IsFalse(isolate)); |
| // Check with callback if set. |
| AllowCodeGenerationFromStringsCallback callback = |
| isolate->allow_code_gen_callback(); |
| if (callback == NULL) { |
| // No callback set and code generation disallowed. |
| return false; |
| } else { |
| // Callback set. Let it decide if code generation is allowed. |
| VMState<EXTERNAL> state(isolate); |
| return callback(v8::Utils::ToLocal(context)); |
| } |
| } |
| |
| bool ContainsAsmModule(Handle<Script> script) { |
| DisallowHeapAllocation no_gc; |
| SharedFunctionInfo::ScriptIterator iter(script); |
| while (SharedFunctionInfo* info = iter.Next()) { |
| if (info->HasAsmWasmData()) return true; |
| } |
| return false; |
| } |
| |
| } // namespace |
| |
| MaybeHandle<JSFunction> Compiler::GetFunctionFromString( |
| Handle<Context> context, Handle<String> source, |
| ParseRestriction restriction) { |
| Isolate* const isolate = context->GetIsolate(); |
| Handle<Context> native_context(context->native_context(), isolate); |
| |
| // Check if native context allows code generation from |
| // strings. Throw an exception if it doesn't. |
| if (native_context->allow_code_gen_from_strings()->IsFalse(isolate) && |
| !CodeGenerationFromStringsAllowed(isolate, native_context)) { |
| Handle<Object> error_message = |
| native_context->ErrorMessageForCodeGenerationFromStrings(); |
| THROW_NEW_ERROR(isolate, NewEvalError(MessageTemplate::kCodeGenFromStrings, |
| error_message), |
| JSFunction); |
| } |
| |
| // Compile source string in the native context. |
| int eval_scope_position = 0; |
| int eval_position = kNoSourcePosition; |
| Handle<SharedFunctionInfo> outer_info(native_context->closure()->shared()); |
| return Compiler::GetFunctionFromEval(source, outer_info, native_context, |
| SLOPPY, restriction, eval_scope_position, |
| eval_position); |
| } |
| |
| Handle<SharedFunctionInfo> Compiler::GetSharedFunctionInfoForScript( |
| Handle<String> source, Handle<Object> script_name, int line_offset, |
| int column_offset, ScriptOriginOptions resource_options, |
| Handle<Object> source_map_url, Handle<Context> context, |
| v8::Extension* extension, ScriptData** cached_data, |
| ScriptCompiler::CompileOptions compile_options, NativesFlag natives, |
| bool is_module) { |
| Isolate* isolate = source->GetIsolate(); |
| if (compile_options == ScriptCompiler::kNoCompileOptions) { |
| cached_data = NULL; |
| } else if (compile_options == ScriptCompiler::kProduceParserCache || |
| compile_options == ScriptCompiler::kProduceCodeCache) { |
| DCHECK(cached_data && !*cached_data); |
| DCHECK(extension == NULL); |
| DCHECK(!isolate->debug()->is_loaded()); |
| } else { |
| DCHECK(compile_options == ScriptCompiler::kConsumeParserCache || |
| compile_options == ScriptCompiler::kConsumeCodeCache); |
| DCHECK(cached_data && *cached_data); |
| DCHECK(extension == NULL); |
| } |
| int source_length = source->length(); |
| isolate->counters()->total_load_size()->Increment(source_length); |
| isolate->counters()->total_compile_size()->Increment(source_length); |
| |
| LanguageMode language_mode = construct_language_mode(FLAG_use_strict); |
| CompilationCache* compilation_cache = isolate->compilation_cache(); |
| |
| // Do a lookup in the compilation cache but not for extensions. |
| MaybeHandle<SharedFunctionInfo> maybe_result; |
| Handle<SharedFunctionInfo> result; |
| if (extension == NULL) { |
| // First check per-isolate compilation cache. |
| maybe_result = compilation_cache->LookupScript( |
| source, script_name, line_offset, column_offset, resource_options, |
| context, language_mode); |
| if (maybe_result.is_null() && FLAG_serialize_toplevel && |
| compile_options == ScriptCompiler::kConsumeCodeCache && |
| !isolate->debug()->is_loaded()) { |
| // Then check cached code provided by embedder. |
| HistogramTimerScope timer(isolate->counters()->compile_deserialize()); |
| RuntimeCallTimerScope runtimeTimer(isolate, |
| &RuntimeCallStats::CompileDeserialize); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), |
| "V8.CompileDeserialize"); |
| Handle<SharedFunctionInfo> result; |
| if (CodeSerializer::Deserialize(isolate, *cached_data, source) |
| .ToHandle(&result)) { |
| // Promote to per-isolate compilation cache. |
| compilation_cache->PutScript(source, context, language_mode, result); |
| return result; |
| } |
| // Deserializer failed. Fall through to compile. |
| } |
| } |
| |
| base::ElapsedTimer timer; |
| if (FLAG_profile_deserialization && FLAG_serialize_toplevel && |
| compile_options == ScriptCompiler::kProduceCodeCache) { |
| timer.Start(); |
| } |
| |
| if (!maybe_result.ToHandle(&result) || |
| (FLAG_serialize_toplevel && |
| compile_options == ScriptCompiler::kProduceCodeCache)) { |
| // No cache entry found, or embedder wants a code cache. Compile the script. |
| |
| // Create a script object describing the script to be compiled. |
| Handle<Script> script = isolate->factory()->NewScript(source); |
| if (isolate->NeedsSourcePositionsForProfiling()) { |
| Script::InitLineEnds(script); |
| } |
| if (natives == NATIVES_CODE) { |
| script->set_type(Script::TYPE_NATIVE); |
| } else if (natives == EXTENSION_CODE) { |
| script->set_type(Script::TYPE_EXTENSION); |
| } else if (natives == INSPECTOR_CODE) { |
| script->set_type(Script::TYPE_INSPECTOR); |
| } |
| if (!script_name.is_null()) { |
| script->set_name(*script_name); |
| script->set_line_offset(line_offset); |
| script->set_column_offset(column_offset); |
| } |
| script->set_origin_options(resource_options); |
| if (!source_map_url.is_null()) { |
| script->set_source_mapping_url(*source_map_url); |
| } |
| |
| // Compile the function and add it to the cache. |
| Zone zone(isolate->allocator(), ZONE_NAME); |
| ParseInfo parse_info(&zone, script); |
| CompilationInfo info(&parse_info, Handle<JSFunction>::null()); |
| if (is_module) parse_info.set_module(); |
| if (compile_options != ScriptCompiler::kNoCompileOptions) { |
| parse_info.set_cached_data(cached_data); |
| } |
| parse_info.set_compile_options(compile_options); |
| parse_info.set_extension(extension); |
| if (!context->IsNativeContext()) { |
| parse_info.set_outer_scope_info(handle(context->scope_info())); |
| } |
| if (FLAG_serialize_toplevel && |
| compile_options == ScriptCompiler::kProduceCodeCache) { |
| info.PrepareForSerializing(); |
| } |
| |
| parse_info.set_language_mode( |
| static_cast<LanguageMode>(parse_info.language_mode() | language_mode)); |
| result = CompileToplevel(&info); |
| if (extension == NULL && !result.is_null()) { |
| compilation_cache->PutScript(source, context, language_mode, result); |
| if (FLAG_serialize_toplevel && |
| compile_options == ScriptCompiler::kProduceCodeCache && |
| !ContainsAsmModule(script)) { |
| HistogramTimerScope histogram_timer( |
| isolate->counters()->compile_serialize()); |
| RuntimeCallTimerScope runtimeTimer(isolate, |
| &RuntimeCallStats::CompileSerialize); |
| TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), |
| "V8.CompileSerialize"); |
| *cached_data = CodeSerializer::Serialize(isolate, result, source); |
| if (FLAG_profile_deserialization) { |
| PrintF("[Compiling and serializing took %0.3f ms]\n", |
| timer.Elapsed().InMillisecondsF()); |
| } |
| } |
| } |
| |
| if (result.is_null()) { |
| isolate->ReportPendingMessages(); |
| } else { |
| isolate->debug()->OnAfterCompile(script); |
| } |
| } else if (result->ic_age() != isolate->heap()->global_ic_age()) { |
| result->ResetForNewContext(isolate->heap()->global_ic_age()); |
| } |
| return result; |
| } |
| |
| Handle<SharedFunctionInfo> Compiler::GetSharedFunctionInfoForStreamedScript( |
| Handle<Script> script, ParseInfo* parse_info, int source_length) { |
| Isolate* isolate = script->GetIsolate(); |
| // TODO(titzer): increment the counters in caller. |
| isolate->counters()->total_load_size()->Increment(source_length); |
| isolate->counters()->total_compile_size()->Increment(source_length); |
| |
| LanguageMode language_mode = construct_language_mode(FLAG_use_strict); |
| parse_info->set_language_mode( |
| static_cast<LanguageMode>(parse_info->language_mode() | language_mode)); |
| |
| CompilationInfo compile_info(parse_info, Handle<JSFunction>::null()); |
| |
| // The source was parsed lazily, so compiling for debugging is not possible. |
| DCHECK(!compile_info.is_debug()); |
| |
| Handle<SharedFunctionInfo> result = CompileToplevel(&compile_info); |
| if (!result.is_null()) isolate->debug()->OnAfterCompile(script); |
| return result; |
| } |
| |
| Handle<SharedFunctionInfo> Compiler::GetSharedFunctionInfo( |
| FunctionLiteral* literal, Handle<Script> script, |
| CompilationInfo* outer_info) { |
| // Precondition: code has been parsed and scopes have been analyzed. |
| Isolate* isolate = outer_info->isolate(); |
| MaybeHandle<SharedFunctionInfo> maybe_existing; |
| |
| // Find any previously allocated shared function info for the given literal. |
| maybe_existing = script->FindSharedFunctionInfo(isolate, literal); |
| |
| // If we found an existing shared function info, return it. |
| Handle<SharedFunctionInfo> existing; |
| if (maybe_existing.ToHandle(&existing)) { |
| DCHECK(!existing->is_toplevel()); |
| return existing; |
| } |
| |
| // Allocate a shared function info object which will be compiled lazily. |
| Handle<SharedFunctionInfo> result = |
| isolate->factory()->NewSharedFunctionInfoForLiteral(literal, script); |
| result->set_is_toplevel(false); |
| Scope* outer_scope = literal->scope()->GetOuterScopeWithContext(); |
| if (outer_scope) { |
| result->set_outer_scope_info(*outer_scope->scope_info()); |
| } |
| return result; |
| } |
| |
| Handle<SharedFunctionInfo> Compiler::GetSharedFunctionInfoForNative( |
| v8::Extension* extension, Handle<String> name) { |
| Isolate* isolate = name->GetIsolate(); |
| v8::Isolate* v8_isolate = reinterpret_cast<v8::Isolate*>(isolate); |
| |
| // Compute the function template for the native function. |
| v8::Local<v8::FunctionTemplate> fun_template = |
| extension->GetNativeFunctionTemplate(v8_isolate, |
| v8::Utils::ToLocal(name)); |
| DCHECK(!fun_template.IsEmpty()); |
| |
| // Instantiate the function and create a shared function info from it. |
| Handle<JSFunction> fun = Handle<JSFunction>::cast(Utils::OpenHandle( |
| *fun_template->GetFunction(v8_isolate->GetCurrentContext()) |
| .ToLocalChecked())); |
| Handle<Code> code = Handle<Code>(fun->shared()->code()); |
| Handle<Code> construct_stub = Handle<Code>(fun->shared()->construct_stub()); |
| Handle<SharedFunctionInfo> shared = isolate->factory()->NewSharedFunctionInfo( |
| name, fun->shared()->num_literals(), FunctionKind::kNormalFunction, code, |
| Handle<ScopeInfo>(fun->shared()->scope_info())); |
| shared->set_outer_scope_info(fun->shared()->outer_scope_info()); |
| shared->SetConstructStub(*construct_stub); |
| shared->set_feedback_metadata(fun->shared()->feedback_metadata()); |
| |
| // Copy the function data to the shared function info. |
| shared->set_function_data(fun->shared()->function_data()); |
| int parameters = fun->shared()->internal_formal_parameter_count(); |
| shared->set_internal_formal_parameter_count(parameters); |
| |
| return shared; |
| } |
| |
| MaybeHandle<Code> Compiler::GetOptimizedCodeForOSR(Handle<JSFunction> function, |
| BailoutId osr_ast_id, |
| JavaScriptFrame* osr_frame) { |
| DCHECK(!osr_ast_id.IsNone()); |
| DCHECK_NOT_NULL(osr_frame); |
| return GetOptimizedCode(function, NOT_CONCURRENT, osr_ast_id, osr_frame); |
| } |
| |
| CompilationJob* Compiler::PrepareUnoptimizedCompilationJob( |
| CompilationInfo* info) { |
| VMState<COMPILER> state(info->isolate()); |
| std::unique_ptr<CompilationJob> job(GetUnoptimizedCompilationJob(info)); |
| if (job->PrepareJob() != CompilationJob::SUCCEEDED) { |
| return nullptr; |
| } |
| return job.release(); |
| } |
| |
| bool Compiler::FinalizeCompilationJob(CompilationJob* raw_job) { |
| // Take ownership of compilation job. Deleting job also tears down the zone. |
| std::unique_ptr<CompilationJob> job(raw_job); |
| |
| VMState<COMPILER> state(job->info()->isolate()); |
| if (job->info()->IsOptimizing()) { |
| return FinalizeOptimizedCompilationJob(job.get()) == |
| CompilationJob::SUCCEEDED; |
| } else { |
| if (FinalizeUnoptimizedCompilationJob(job.get()) == |
| CompilationJob::SUCCEEDED) { |
| RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, |
| job->info()); |
| return true; |
| } |
| return false; |
| } |
| } |
| |
| void Compiler::PostInstantiation(Handle<JSFunction> function, |
| PretenureFlag pretenure) { |
| Handle<SharedFunctionInfo> shared(function->shared()); |
| |
| if (FLAG_always_opt && shared->allows_lazy_compilation() && |
| !function->shared()->HasAsmWasmData() && |
| function->shared()->is_compiled()) { |
| function->MarkForOptimization(); |
| } |
| |
| Code* code = shared->SearchOptimizedCodeMap( |
| function->context()->native_context(), BailoutId::None()); |
| if (code != nullptr) { |
| // Caching of optimized code enabled and optimized code found. |
| DCHECK(!code->marked_for_deoptimization()); |
| DCHECK(function->shared()->is_compiled()); |
| function->ReplaceCode(code); |
| } |
| |
| if (shared->is_compiled()) { |
| // TODO(mvstanton): pass pretenure flag to EnsureLiterals. |
| JSFunction::EnsureLiterals(function); |
| } |
| } |
| |
| } // namespace internal |
| } // namespace v8 |