| // 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 "src/ast/ast-numbering.h" |
| #include "src/ast/prettyprinter.h" |
| #include "src/ast/scopeinfo.h" |
| #include "src/ast/scopes.h" |
| #include "src/bootstrapper.h" |
| #include "src/codegen.h" |
| #include "src/compilation-cache.h" |
| #include "src/compiler/pipeline.h" |
| #include "src/crankshaft/hydrogen.h" |
| #include "src/debug/debug.h" |
| #include "src/debug/liveedit.h" |
| #include "src/deoptimizer.h" |
| #include "src/frames-inl.h" |
| #include "src/full-codegen/full-codegen.h" |
| #include "src/interpreter/interpreter.h" |
| #include "src/isolate-inl.h" |
| #include "src/log-inl.h" |
| #include "src/messages.h" |
| #include "src/parsing/parser.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/typing-asm.h" |
| #include "src/vm-state-inl.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| #define PARSE_INFO_GETTER(type, name) \ |
| type CompilationInfo::name() const { \ |
| CHECK(parse_info()); \ |
| return parse_info()->name(); \ |
| } |
| |
| |
| #define PARSE_INFO_GETTER_WITH_DEFAULT(type, name, def) \ |
| type CompilationInfo::name() const { \ |
| return parse_info() ? parse_info()->name() : def; \ |
| } |
| |
| |
| PARSE_INFO_GETTER(Handle<Script>, script) |
| PARSE_INFO_GETTER(FunctionLiteral*, literal) |
| PARSE_INFO_GETTER_WITH_DEFAULT(Scope*, scope, nullptr) |
| PARSE_INFO_GETTER_WITH_DEFAULT(Handle<Context>, context, |
| Handle<Context>::null()) |
| PARSE_INFO_GETTER(Handle<SharedFunctionInfo>, shared_info) |
| |
| #undef PARSE_INFO_GETTER |
| #undef PARSE_INFO_GETTER_WITH_DEFAULT |
| |
| // A wrapper around a CompilationInfo that detaches the Handles from |
| // the underlying DeferredHandleScope and stores them in info_ on |
| // destruction. |
| class CompilationHandleScope BASE_EMBEDDED { |
| 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 CompilationInfo |
| |
| bool CompilationInfo::has_shared_info() const { |
| return parse_info_ && !parse_info_->shared_info().is_null(); |
| } |
| |
| CompilationInfo::CompilationInfo(ParseInfo* parse_info, |
| Handle<JSFunction> closure) |
| : CompilationInfo(parse_info, {}, Code::ComputeFlags(Code::FUNCTION), BASE, |
| parse_info->isolate(), parse_info->zone()) { |
| closure_ = closure; |
| |
| // Compiling for the snapshot typically results in different code than |
| // compiling later on. This means that code recompiled with deoptimization |
| // support won't be "equivalent" (as defined by SharedFunctionInfo:: |
| // EnableDeoptimizationSupport), so it will replace the old code and all |
| // its type feedback. To avoid this, always compile functions in the snapshot |
| // with deoptimization support. |
| if (isolate_->serializer_enabled()) EnableDeoptimizationSupport(); |
| |
| if (FLAG_function_context_specialization) MarkAsFunctionContextSpecializing(); |
| if (FLAG_turbo_inlining) MarkAsInliningEnabled(); |
| if (FLAG_turbo_source_positions) MarkAsSourcePositionsEnabled(); |
| if (FLAG_turbo_splitting) MarkAsSplittingEnabled(); |
| } |
| |
| CompilationInfo::CompilationInfo(Vector<const char> debug_name, |
| Isolate* isolate, Zone* zone, |
| Code::Flags code_flags) |
| : CompilationInfo(nullptr, debug_name, code_flags, STUB, isolate, zone) {} |
| |
| CompilationInfo::CompilationInfo(ParseInfo* parse_info, |
| Vector<const char> debug_name, |
| Code::Flags code_flags, Mode mode, |
| Isolate* isolate, Zone* zone) |
| : parse_info_(parse_info), |
| isolate_(isolate), |
| flags_(0), |
| code_flags_(code_flags), |
| mode_(mode), |
| osr_ast_id_(BailoutId::None()), |
| zone_(zone), |
| deferred_handles_(nullptr), |
| dependencies_(isolate, zone), |
| bailout_reason_(kNoReason), |
| prologue_offset_(Code::kPrologueOffsetNotSet), |
| track_positions_(FLAG_hydrogen_track_positions || |
| isolate->is_profiling()), |
| parameter_count_(0), |
| optimization_id_(-1), |
| osr_expr_stack_height_(0), |
| debug_name_(debug_name) {} |
| |
| CompilationInfo::~CompilationInfo() { |
| DisableFutureOptimization(); |
| dependencies()->Rollback(); |
| delete deferred_handles_; |
| } |
| |
| |
| int CompilationInfo::num_parameters() const { |
| return !IsStub() ? scope()->num_parameters() : parameter_count_; |
| } |
| |
| |
| int CompilationInfo::num_parameters_including_this() const { |
| return num_parameters() + (is_this_defined() ? 1 : 0); |
| } |
| |
| |
| bool CompilationInfo::is_this_defined() const { return !IsStub(); } |
| |
| |
| // Primitive functions are unlikely to be picked up by the stack-walking |
| // profiler, so they trigger their own optimization when they're called |
| // for the SharedFunctionInfo::kCallsUntilPrimitiveOptimization-th time. |
| bool CompilationInfo::ShouldSelfOptimize() { |
| return FLAG_crankshaft && |
| !(literal()->flags() & AstProperties::kDontSelfOptimize) && |
| !literal()->dont_optimize() && |
| literal()->scope()->AllowsLazyCompilation() && |
| !shared_info()->optimization_disabled(); |
| } |
| |
| |
| bool CompilationInfo::has_simple_parameters() { |
| return scope()->has_simple_parameters(); |
| } |
| |
| |
| base::SmartArrayPointer<char> CompilationInfo::GetDebugName() const { |
| if (parse_info() && parse_info()->literal()) { |
| AllowHandleDereference allow_deref; |
| return parse_info()->literal()->debug_name()->ToCString(); |
| } |
| if (parse_info() && !parse_info()->shared_info().is_null()) { |
| return parse_info()->shared_info()->DebugName()->ToCString(); |
| } |
| Vector<const char> name_vec = debug_name_; |
| if (name_vec.is_empty()) name_vec = ArrayVector("unknown"); |
| base::SmartArrayPointer<char> name(new char[name_vec.length() + 1]); |
| memcpy(name.get(), name_vec.start(), name_vec.length()); |
| name[name_vec.length()] = '\0'; |
| return name; |
| } |
| |
| StackFrame::Type CompilationInfo::GetOutputStackFrameType() const { |
| switch (output_code_kind()) { |
| case Code::STUB: |
| case Code::BYTECODE_HANDLER: |
| case Code::HANDLER: |
| case Code::BUILTIN: |
| #define CASE_KIND(kind) case Code::kind: |
| IC_KIND_LIST(CASE_KIND) |
| #undef CASE_KIND |
| return StackFrame::STUB; |
| case Code::WASM_FUNCTION: |
| return StackFrame::WASM; |
| case Code::JS_TO_WASM_FUNCTION: |
| return StackFrame::JS_TO_WASM; |
| case Code::WASM_TO_JS_FUNCTION: |
| return StackFrame::WASM_TO_JS; |
| default: |
| UNIMPLEMENTED(); |
| return StackFrame::NONE; |
| } |
| } |
| |
| int CompilationInfo::GetDeclareGlobalsFlags() const { |
| DCHECK(DeclareGlobalsLanguageMode::is_valid(parse_info()->language_mode())); |
| return DeclareGlobalsEvalFlag::encode(parse_info()->is_eval()) | |
| DeclareGlobalsNativeFlag::encode(parse_info()->is_native()) | |
| DeclareGlobalsLanguageMode::encode(parse_info()->language_mode()); |
| } |
| |
| bool CompilationInfo::ExpectsJSReceiverAsReceiver() { |
| return is_sloppy(parse_info()->language_mode()) && !parse_info()->is_native(); |
| } |
| |
| #if DEBUG |
| void CompilationInfo::PrintAstForTesting() { |
| PrintF("--- Source from AST ---\n%s\n", |
| PrettyPrinter(isolate()).PrintProgram(literal())); |
| } |
| #endif |
| |
| // ---------------------------------------------------------------------------- |
| // Implementation of CompilationJob |
| |
| CompilationJob::Status CompilationJob::CreateGraph() { |
| DisallowJavascriptExecution no_js(isolate()); |
| DCHECK(info()->IsOptimizing()); |
| |
| if (FLAG_trace_opt) { |
| 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_EQ(SUCCEEDED, last_status()); |
| ScopedTimer t(&time_taken_to_create_graph_); |
| return SetLastStatus(CreateGraphImpl()); |
| } |
| |
| CompilationJob::Status CompilationJob::OptimizeGraph() { |
| DisallowHeapAllocation no_allocation; |
| DisallowHandleAllocation no_handles; |
| DisallowHandleDereference no_deref; |
| DisallowCodeDependencyChange no_dependency_change; |
| |
| // Delegate to the underlying implementation. |
| DCHECK_EQ(SUCCEEDED, last_status()); |
| ScopedTimer t(&time_taken_to_optimize_); |
| return SetLastStatus(OptimizeGraphImpl()); |
| } |
| |
| CompilationJob::Status CompilationJob::GenerateCode() { |
| DisallowCodeDependencyChange no_dependency_change; |
| DisallowJavascriptExecution no_js(isolate()); |
| DCHECK(!info()->dependencies()->HasAborted()); |
| |
| // Delegate to the underlying implementation. |
| DCHECK_EQ(SUCCEEDED, last_status()); |
| ScopedTimer t(&time_taken_to_codegen_); |
| return SetLastStatus(GenerateCodeImpl()); |
| } |
| |
| |
| namespace { |
| |
| void AddWeakObjectToCodeDependency(Isolate* isolate, Handle<HeapObject> object, |
| Handle<Code> code) { |
| Handle<WeakCell> cell = Code::WeakCellFor(code); |
| Heap* heap = isolate->heap(); |
| 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); |
| } |
| |
| void CompilationJob::RecordOptimizationStats() { |
| 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_create_graph_.InMillisecondsF(); |
| double ms_optimize = time_taken_to_optimize_.InMillisecondsF(); |
| double ms_codegen = time_taken_to_codegen_.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_create_graph_, |
| time_taken_to_optimize_, |
| time_taken_to_codegen_); |
| } |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // Local helper methods that make up the compilation pipeline. |
| |
| namespace { |
| |
| bool IsEvalToplevel(Handle<SharedFunctionInfo> shared) { |
| return shared->is_toplevel() && shared->script()->IsScript() && |
| Script::cast(shared->script())->compilation_type() == |
| Script::COMPILATION_TYPE_EVAL; |
| } |
| |
| 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 UseIgnition(CompilationInfo* info) { |
| DCHECK(info->has_shared_info()); |
| |
| // 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() && info->shared_info()->is_compiled()) { |
| return info->shared_info()->HasBytecodeArray(); |
| } |
| |
| // For generator or async functions we might avoid Ignition wholesale. |
| if (info->shared_info()->is_resumable() && !FLAG_ignition_generators) { |
| return false; |
| } |
| |
| // Since we can't OSR from Ignition, skip Ignition for asm.js functions. |
| if (info->shared_info()->asm_function()) { |
| return false; |
| } |
| |
| // Checks whether top level functions should be passed by the filter. |
| if (info->shared_info()->is_toplevel()) { |
| Vector<const char> filter = CStrVector(FLAG_ignition_filter); |
| return (filter.length() == 0) || (filter.length() == 1 && filter[0] == '*'); |
| } |
| |
| // Finally respect the filter. |
| return info->shared_info()->PassesFilter(FLAG_ignition_filter); |
| } |
| |
| int CodeAndMetadataSize(CompilationInfo* info) { |
| if (info->has_bytecode_array()) { |
| return info->bytecode_array()->SizeIncludingMetadata(); |
| } |
| return info->code()->SizeIncludingMetadata(); |
| } |
| |
| bool GenerateUnoptimizedCode(CompilationInfo* info) { |
| bool success; |
| EnsureFeedbackMetadata(info); |
| if (FLAG_validate_asm && info->scope()->asm_module()) { |
| AsmTyper typer(info->isolate(), info->zone(), *(info->script()), |
| info->literal()); |
| if (FLAG_enable_simd_asmjs) { |
| typer.set_allow_simd(true); |
| } |
| if (!typer.Validate()) { |
| DCHECK(!info->isolate()->has_pending_exception()); |
| PrintF("Validation of asm.js module failed: %s", typer.error_message()); |
| } |
| } |
| if (FLAG_ignition && UseIgnition(info)) { |
| success = interpreter::Interpreter::MakeBytecode(info); |
| } else { |
| success = FullCodeGenerator::MakeCode(info); |
| } |
| if (success) { |
| Isolate* isolate = info->isolate(); |
| Counters* counters = isolate->counters(); |
| // TODO(4280): Rename counters from "baseline" to "unoptimized" eventually. |
| counters->total_baseline_code_size()->Increment(CodeAndMetadataSize(info)); |
| counters->total_baseline_compile_count()->Increment(1); |
| } |
| return success; |
| } |
| |
| bool CompileUnoptimizedCode(CompilationInfo* info) { |
| DCHECK(AllowCompilation::IsAllowed(info->isolate())); |
| if (!Compiler::Analyze(info->parse_info()) || |
| !GenerateUnoptimizedCode(info)) { |
| Isolate* isolate = info->isolate(); |
| if (!isolate->has_pending_exception()) isolate->StackOverflow(); |
| return false; |
| } |
| return true; |
| } |
| |
| void InstallSharedScopeInfo(CompilationInfo* info, |
| Handle<SharedFunctionInfo> shared) { |
| Handle<ScopeInfo> scope_info = |
| ScopeInfo::Create(info->isolate(), info->zone(), info->scope()); |
| shared->set_scope_info(*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(); |
| } |
| // Assert that we are not overwriting (possibly patched) debug code. |
| DCHECK(!shared->HasDebugInfo()); |
| 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()); |
| } |
| } |
| |
| MUST_USE_RESULT MaybeHandle<Code> GetUnoptimizedCode(CompilationInfo* info) { |
| VMState<COMPILER> state(info->isolate()); |
| PostponeInterruptsScope postpone(info->isolate()); |
| |
| // Parse and update CompilationInfo with the results. |
| if (!Parser::ParseStatic(info->parse_info())) return MaybeHandle<Code>(); |
| Handle<SharedFunctionInfo> shared = info->shared_info(); |
| DCHECK_EQ(shared->language_mode(), info->literal()->language_mode()); |
| |
| // Compile either unoptimized code or bytecode for the interpreter. |
| if (!CompileUnoptimizedCode(info)) 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(); |
| } |
| |
| MUST_USE_RESULT MaybeHandle<Code> GetCodeFromOptimizedCodeMap( |
| Handle<JSFunction> function, BailoutId osr_ast_id) { |
| Handle<SharedFunctionInfo> shared(function->shared()); |
| DisallowHeapAllocation no_gc; |
| CodeAndLiterals cached = shared->SearchOptimizedCodeMap( |
| function->context()->native_context(), osr_ast_id); |
| if (cached.code != nullptr) { |
| // Caching of optimized code enabled and optimized code found. |
| if (cached.literals != nullptr) function->set_literals(cached.literals); |
| DCHECK(!cached.code->marked_for_deoptimization()); |
| DCHECK(function->shared()->is_compiled()); |
| return Handle<Code>(cached.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()); |
| |
| // Cache optimized context-specific code. |
| Handle<JSFunction> function = info->closure(); |
| Handle<SharedFunctionInfo> shared(function->shared()); |
| Handle<LiteralsArray> literals(function->literals()); |
| Handle<Context> native_context(function->context()->native_context()); |
| SharedFunctionInfo::AddToOptimizedCodeMap(shared, native_context, code, |
| literals, info->osr_ast_id()); |
| |
| // Do not cache (native) context-independent code compiled for OSR. |
| if (code->is_turbofanned() && info->is_osr()) return; |
| |
| // Cache optimized (native) context-independent code. |
| if (FLAG_turbo_cache_shared_code && code->is_turbofanned() && |
| !info->is_native_context_specializing()) { |
| DCHECK(!info->is_function_context_specializing()); |
| DCHECK(info->osr_ast_id().IsNone()); |
| Handle<SharedFunctionInfo> shared(function->shared()); |
| SharedFunctionInfo::AddSharedCodeToOptimizedCodeMap(shared, code); |
| } |
| } |
| |
| bool Renumber(ParseInfo* parse_info) { |
| if (!AstNumbering::Renumber(parse_info->isolate(), parse_info->zone(), |
| parse_info->literal())) { |
| 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()); |
| } |
| shared_info->set_dont_crankshaft( |
| shared_info->dont_crankshaft() || |
| (lit->flags() & AstProperties::kDontCrankshaft)); |
| } |
| return true; |
| } |
| |
| bool UseTurboFan(Handle<SharedFunctionInfo> shared) { |
| bool optimization_disabled = shared->optimization_disabled(); |
| bool dont_crankshaft = shared->dont_crankshaft(); |
| |
| // 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 = |
| dont_crankshaft && 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 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("v8", "V8.RecompileSynchronous"); |
| |
| if (job->CreateGraph() != CompilationJob::SUCCEEDED || |
| job->OptimizeGraph() != CompilationJob::SUCCEEDED || |
| job->GenerateCode() != CompilationJob::SUCCEEDED) { |
| if (FLAG_trace_opt) { |
| PrintF("[aborted optimizing "); |
| info->closure()->ShortPrint(); |
| PrintF(" because: %s]\n", GetBailoutReason(info->bailout_reason())); |
| } |
| return false; |
| } |
| |
| // Success! |
| job->RecordOptimizationStats(); |
| 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; |
| } |
| |
| // 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. |
| CompilationHandleScope handle_scope(info); |
| |
| // 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()); |
| |
| // Reopen handles in the new CompilationHandleScope. |
| info->ReopenHandlesInNewHandleScope(); |
| info->parse_info()->ReopenHandlesInNewHandleScope(); |
| |
| TimerEventScope<TimerEventRecompileSynchronous> timer(info->isolate()); |
| RuntimeCallTimerScope runtimeTimer(info->isolate(), |
| &RuntimeCallStats::RecompileSynchronous); |
| TRACE_EVENT0("v8", "V8.RecompileSynchronous"); |
| |
| if (job->CreateGraph() != 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); |
| |
| Handle<Code> cached_code; |
| if (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. |
| if (shared->is_compiled()) { |
| shared->code()->set_profiler_ticks(0); |
| } |
| |
| VMState<COMPILER> state(isolate); |
| DCHECK(!isolate->has_pending_exception()); |
| PostponeInterruptsScope postpone(isolate); |
| bool use_turbofan = UseTurboFan(shared); |
| base::SmartPointer<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(kOptimizedTooManyTimes); |
| return MaybeHandle<Code>(); |
| } |
| |
| CanonicalHandleScope canonical(isolate); |
| TimerEventScope<TimerEventOptimizeCode> optimize_code_timer(isolate); |
| RuntimeCallTimerScope runtimeTimer(isolate, &RuntimeCallStats::OptimizeCode); |
| TRACE_EVENT0("v8", "V8.OptimizeCode"); |
| |
| // TurboFan can optimize directly from existing bytecode. |
| if (FLAG_turbo_from_bytecode && use_turbofan && |
| info->shared_info()->HasBytecodeArray()) { |
| info->MarkAsOptimizeFromBytecode(); |
| } |
| |
| if (IsEvalToplevel(shared)) { |
| parse_info->set_eval(); |
| if (function->context()->IsNativeContext()) parse_info->set_global(); |
| parse_info->set_toplevel(); |
| parse_info->set_allow_lazy_parsing(false); |
| parse_info->set_lazy(false); |
| } |
| |
| if (mode == Compiler::CONCURRENT) { |
| if (GetOptimizedCodeLater(job.get())) { |
| job.Detach(); // 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>(); |
| } |
| |
| class InterpreterActivationsFinder : public ThreadVisitor, |
| public OptimizedFunctionVisitor { |
| public: |
| explicit InterpreterActivationsFinder(SharedFunctionInfo* shared) |
| : shared_(shared), has_activations_(false) {} |
| |
| void VisitThread(Isolate* isolate, ThreadLocalTop* top) { |
| Address* activation_pc_address = nullptr; |
| JavaScriptFrameIterator it(isolate, top); |
| for (; !it.done(); it.Advance()) { |
| JavaScriptFrame* frame = it.frame(); |
| if (!frame->is_interpreted()) continue; |
| if (frame->function()->shared() == shared_) { |
| has_activations_ = true; |
| activation_pc_address = frame->pc_address(); |
| } |
| } |
| |
| if (activation_pc_address) { |
| activation_pc_addresses_.push_back(activation_pc_address); |
| } |
| } |
| |
| void VisitFunction(JSFunction* function) { |
| if (function->Inlines(shared_)) has_activations_ = true; |
| } |
| |
| void EnterContext(Context* context) {} |
| void LeaveContext(Context* context) {} |
| |
| bool MarkActivationsForBaselineOnReturn(Isolate* isolate) { |
| if (activation_pc_addresses_.empty()) return false; |
| |
| for (Address* activation_pc_address : activation_pc_addresses_) { |
| DCHECK(isolate->inner_pointer_to_code_cache() |
| ->GetCacheEntry(*activation_pc_address) |
| ->code->is_interpreter_trampoline_builtin()); |
| *activation_pc_address = |
| isolate->builtins()->InterpreterMarkBaselineOnReturn()->entry(); |
| } |
| return true; |
| } |
| |
| bool has_activations() { return has_activations_; } |
| |
| private: |
| SharedFunctionInfo* shared_; |
| bool has_activations_; |
| std::vector<Address*> activation_pc_addresses_; |
| }; |
| |
| bool HasInterpreterActivations( |
| Isolate* isolate, InterpreterActivationsFinder* activations_finder) { |
| activations_finder->VisitThread(isolate, isolate->thread_local_top()); |
| isolate->thread_manager()->IterateArchivedThreads(activations_finder); |
| if (FLAG_turbo_from_bytecode) { |
| // If we are able to optimize functions directly from bytecode, then there |
| // might be optimized functions that rely on bytecode being around. We need |
| // to prevent switching the given function to baseline code in those cases. |
| Deoptimizer::VisitAllOptimizedFunctions(isolate, activations_finder); |
| } |
| return activations_finder->has_activations(); |
| } |
| |
| MaybeHandle<Code> GetBaselineCode(Handle<JSFunction> function) { |
| Isolate* isolate = function->GetIsolate(); |
| VMState<COMPILER> state(isolate); |
| PostponeInterruptsScope postpone(isolate); |
| Zone zone(isolate->allocator()); |
| ParseInfo parse_info(&zone, function); |
| CompilationInfo info(&parse_info, function); |
| |
| // 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>(); |
| } |
| |
| // TODO(4280): For now we do not switch generators or async functions to |
| // baseline code because there might be suspended activations stored in |
| // generator objects on the heap. We could eventually go directly to |
| // TurboFan in this case. |
| if (function->shared()->is_resumable()) { |
| return MaybeHandle<Code>(); |
| } |
| |
| // TODO(4280): For now we disable switching to baseline code in the presence |
| // of interpreter activations of the given function. The reasons are: |
| // 1) The debugger assumes each function is either full-code or bytecode. |
| // 2) The underlying bytecode is cleared below, breaking stack unwinding. |
| InterpreterActivationsFinder activations_finder(function->shared()); |
| if (HasInterpreterActivations(isolate, &activations_finder)) { |
| if (FLAG_trace_opt) { |
| OFStream os(stdout); |
| os << "[unable to switch " << Brief(*function) << " due to activations]" |
| << std::endl; |
| } |
| |
| if (activations_finder.MarkActivationsForBaselineOnReturn(isolate)) { |
| if (FLAG_trace_opt) { |
| OFStream os(stdout); |
| os << "[marking " << Brief(function->shared()) |
| << " for baseline recompilation on return]" << std::endl; |
| } |
| } |
| |
| return MaybeHandle<Code>(); |
| } |
| |
| 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 (!Parser::ParseStatic(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>(); |
| } |
| |
| // TODO(4280): For now we play it safe and remove the bytecode array when we |
| // switch to baseline code. We might consider keeping around the bytecode so |
| // that it can be used as the "source of truth" eventually. |
| shared->ClearBytecodeArray(); |
| |
| // 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::CompileCodeLazy); |
| TRACE_EVENT0("v8", "V8.CompileCode"); |
| AggregatedHistogramTimerScope timer(isolate->counters()->compile_lazy()); |
| |
| if (FLAG_turbo_cache_shared_code) { |
| 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()) { |
| return Handle<Code>(function->shared()->code()); |
| } |
| |
| Zone zone(isolate->allocator()); |
| ParseInfo parse_info(&zone, function); |
| CompilationInfo info(&parse_info, function); |
| Handle<Code> result; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, result, GetUnoptimizedCode(&info), Code); |
| |
| if (FLAG_always_opt) { |
| Handle<Code> opt_code; |
| if (GetOptimizedCode(function, Compiler::NOT_CONCURRENT) |
| .ToHandle(&opt_code)) { |
| result = opt_code; |
| } |
| } |
| |
| return result; |
| } |
| |
| |
| Handle<SharedFunctionInfo> NewSharedFunctionInfoForLiteral( |
| Isolate* isolate, FunctionLiteral* literal, Handle<Script> script) { |
| Handle<Code> code = isolate->builtins()->CompileLazy(); |
| Handle<ScopeInfo> scope_info = handle(ScopeInfo::Empty(isolate)); |
| Handle<SharedFunctionInfo> result = isolate->factory()->NewSharedFunctionInfo( |
| literal->name(), literal->materialized_literal_count(), literal->kind(), |
| code, scope_info); |
| SharedFunctionInfo::InitFromFunctionLiteral(result, literal); |
| SharedFunctionInfo::SetScript(result, script); |
| return result; |
| } |
| |
| Handle<SharedFunctionInfo> CompileToplevel(CompilationInfo* info) { |
| Isolate* isolate = info->isolate(); |
| TimerEventScope<TimerEventCompileCode> timer(isolate); |
| RuntimeCallTimerScope runtimeTimer(isolate, &RuntimeCallStats::CompileCode); |
| TRACE_EVENT0("v8", "V8.CompileCode"); |
| PostponeInterruptsScope postpone(isolate); |
| DCHECK(!isolate->native_context().is_null()); |
| ParseInfo* parse_info = info->parse_info(); |
| 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)); |
| |
| isolate->debug()->OnBeforeCompile(script); |
| |
| DCHECK(parse_info->is_eval() || parse_info->is_global() || |
| parse_info->is_module()); |
| |
| parse_info->set_toplevel(); |
| |
| Handle<SharedFunctionInfo> result; |
| |
| { VMState<COMPILER> state(info->isolate()); |
| if (parse_info->literal() == NULL) { |
| // Parse the script if needed (if it's already parsed, literal() is |
| // non-NULL). If compiling for debugging, we may eagerly compile inner |
| // functions, so do not parse lazily in that case. |
| ScriptCompiler::CompileOptions options = parse_info->compile_options(); |
| bool parse_allow_lazy = (options == ScriptCompiler::kConsumeParserCache || |
| String::cast(script->source())->length() > |
| FLAG_min_preparse_length) && |
| !info->is_debug(); |
| |
| // Consider parsing eagerly when targeting the code cache. |
| parse_allow_lazy &= !(FLAG_serialize_eager && info->will_serialize()); |
| |
| // Consider parsing eagerly when targeting Ignition. |
| parse_allow_lazy &= !(FLAG_ignition && FLAG_ignition_eager && |
| !isolate->serializer_enabled()); |
| |
| parse_info->set_allow_lazy_parsing(parse_allow_lazy); |
| if (!parse_allow_lazy && |
| (options == ScriptCompiler::kProduceParserCache || |
| options == ScriptCompiler::kConsumeParserCache)) { |
| // We are going to parse eagerly, but we either 1) have cached data |
| // produced by lazy parsing or 2) are asked to generate cached data. |
| // Eager parsing cannot benefit from cached data, and producing cached |
| // data while parsing eagerly is not implemented. |
| parse_info->set_cached_data(nullptr); |
| parse_info->set_compile_options(ScriptCompiler::kNoCompileOptions); |
| } |
| if (!Parser::ParseStatic(parse_info)) { |
| return Handle<SharedFunctionInfo>::null(); |
| } |
| } |
| |
| DCHECK(!info->is_debug() || !parse_info->allow_lazy_parsing()); |
| |
| FunctionLiteral* lit = parse_info->literal(); |
| |
| // 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. |
| RuntimeCallTimerScope runtimeTimer( |
| isolate, parse_info->is_eval() ? &RuntimeCallStats::CompileEval |
| : &RuntimeCallStats::Compile); |
| HistogramTimer* rate = parse_info->is_eval() |
| ? info->isolate()->counters()->compile_eval() |
| : info->isolate()->counters()->compile(); |
| HistogramTimerScope timer(rate); |
| TRACE_EVENT0("v8", parse_info->is_eval() ? "V8.CompileEval" : "V8.Compile"); |
| |
| // Allocate a shared function info object. |
| DCHECK_EQ(RelocInfo::kNoPosition, lit->function_token_position()); |
| result = NewSharedFunctionInfoForLiteral(isolate, lit, script); |
| result->set_is_toplevel(true); |
| if (parse_info->is_eval()) { |
| // Eval scripts cannot be (re-)compiled without context. |
| result->set_allows_lazy_compilation_without_context(false); |
| } |
| parse_info->set_shared_info(result); |
| |
| // Compile the code. |
| if (!CompileUnoptimizedCode(info)) { |
| return Handle<SharedFunctionInfo>::null(); |
| } |
| |
| // Update the shared function info with the scope info. |
| InstallSharedScopeInfo(info, result); |
| |
| // Install compilation result on the shared function info |
| InstallSharedCompilationResult(info, result); |
| |
| 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) { |
| DCHECK_NOT_NULL(info->literal()); |
| if (!Rewriter::Rewrite(info)) return false; |
| if (!Scope::Analyze(info)) return false; |
| if (!Renumber(info)) return false; |
| DCHECK_NOT_NULL(info->scope()); |
| return true; |
| } |
| |
| bool Compiler::ParseAndAnalyze(ParseInfo* info) { |
| if (!Parser::ParseStatic(info)) return false; |
| 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 { |
| Zone zone(isolate->allocator()); |
| ParseInfo parse_info(&zone, function); |
| 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<JSFunction> function) { |
| Isolate* isolate = function->GetIsolate(); |
| DCHECK(AllowCompilation::IsAllowed(isolate)); |
| |
| // Start a compilation. |
| Zone zone(isolate->allocator()); |
| ParseInfo parse_info(&zone, function); |
| CompilationInfo info(&parse_info, Handle<JSFunction>::null()); |
| if (IsEvalToplevel(handle(function->shared()))) { |
| parse_info.set_eval(); |
| if (function->context()->IsNativeContext()) parse_info.set_global(); |
| parse_info.set_toplevel(); |
| parse_info.set_allow_lazy_parsing(false); |
| parse_info.set_lazy(false); |
| } |
| info.MarkAsDebug(); |
| if (GetUnoptimizedCode(&info).is_null()) { |
| isolate->clear_pending_exception(); |
| return false; |
| } |
| |
| // Check postconditions on success. |
| DCHECK(!isolate->has_pending_exception()); |
| DCHECK(function->shared()->is_compiled()); |
| DCHECK(function->shared()->HasDebugCode()); |
| return true; |
| } |
| |
| bool Compiler::CompileDebugCode(Handle<SharedFunctionInfo> shared) { |
| Isolate* isolate = shared->GetIsolate(); |
| DCHECK(AllowCompilation::IsAllowed(isolate)); |
| |
| // Start a compilation. |
| Zone zone(isolate->allocator()); |
| ParseInfo parse_info(&zone, shared); |
| CompilationInfo info(&parse_info, Handle<JSFunction>::null()); |
| DCHECK(shared->allows_lazy_compilation_without_context()); |
| DCHECK(!IsEvalToplevel(shared)); |
| 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<Object> old_function_infos(script->shared_function_infos(), isolate); |
| script->set_shared_function_infos(Smi::FromInt(0)); |
| |
| // Start a compilation. |
| Zone zone(isolate->allocator()); |
| ParseInfo parse_info(&zone, script); |
| CompilationInfo info(&parse_info, Handle<JSFunction>::null()); |
| parse_info.set_global(); |
| 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; |
| } |
| |
| // 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()); |
| CompilationInfo unoptimized(info->parse_info(), info->closure()); |
| unoptimized.EnableDeoptimizationSupport(); |
| |
| // TODO(4280): For now we do not switch generators or async functions to |
| // baseline code because there might be suspended activations stored in |
| // generator objects on the heap. We could eventually go directly to |
| // TurboFan in this case. |
| if (shared->is_resumable()) return false; |
| |
| // TODO(4280): For now we disable switching to baseline code in the presence |
| // of interpreter activations of the given function. The reasons are: |
| // 1) The debugger assumes each function is either full-code or bytecode. |
| // 2) The underlying bytecode is cleared below, breaking stack unwinding. |
| // The expensive check for activations only needs to be done when the given |
| // function has bytecode, otherwise we can be sure there are no activations. |
| if (shared->HasBytecodeArray()) { |
| InterpreterActivationsFinder activations_finder(*shared); |
| if (HasInterpreterActivations(info->isolate(), &activations_finder)) { |
| return false; |
| } |
| } |
| |
| // 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); |
| if (!FullCodeGenerator::MakeCode(&unoptimized)) return false; |
| |
| // TODO(4280): For now we play it safe and remove the bytecode array when we |
| // switch to baseline code. We might consider keeping around the bytecode so |
| // that it can be used as the "source of truth" eventually. |
| shared->ClearBytecodeArray(); |
| |
| // 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; |
| } |
| |
| 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 (!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()); |
| ParseInfo parse_info(&zone, script); |
| CompilationInfo info(&parse_info, Handle<JSFunction>::null()); |
| parse_info.set_eval(); |
| if (context->IsNativeContext()) parse_info.set_global(); |
| parse_info.set_language_mode(language_mode); |
| parse_info.set_parse_restriction(restriction); |
| parse_info.set_context(context); |
| |
| 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; |
| } |
| |
| 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("v8", "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 (natives == NATIVES_CODE) { |
| script->set_type(Script::TYPE_NATIVE); |
| script->set_hide_source(true); |
| } else if (natives == EXTENSION_CODE) { |
| script->set_type(Script::TYPE_EXTENSION); |
| script->set_hide_source(true); |
| } |
| 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()); |
| ParseInfo parse_info(&zone, script); |
| CompilationInfo info(&parse_info, Handle<JSFunction>::null()); |
| if (is_module) { |
| parse_info.set_module(); |
| } else { |
| parse_info.set_global(); |
| } |
| if (compile_options != ScriptCompiler::kNoCompileOptions) { |
| parse_info.set_cached_data(cached_data); |
| } |
| parse_info.set_compile_options(compile_options); |
| parse_info.set_extension(extension); |
| parse_info.set_context(context); |
| 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) { |
| HistogramTimerScope histogram_timer( |
| isolate->counters()->compile_serialize()); |
| RuntimeCallTimerScope runtimeTimer(isolate, |
| &RuntimeCallStats::CompileSerialize); |
| TRACE_EVENT0("v8", "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. |
| if (outer_info->shared_info()->never_compiled()) { |
| // On the first compile, there are no existing shared function info for |
| // inner functions yet, so do not try to find them. All bets are off for |
| // live edit though. |
| SLOW_DCHECK(script->FindSharedFunctionInfo(literal).is_null() || |
| isolate->debug()->live_edit_enabled()); |
| } else { |
| maybe_existing = script->FindSharedFunctionInfo(literal); |
| } |
| |
| // We found an existing shared function info. If it's already compiled, |
| // don't worry about compiling it, and simply return it. If it's not yet |
| // compiled, continue to decide whether to eagerly compile. |
| // Carry on if we are compiling eager to obtain code for debugging, |
| // unless we already have code with debut break slots. |
| Handle<SharedFunctionInfo> existing; |
| if (maybe_existing.ToHandle(&existing) && existing->is_compiled()) { |
| DCHECK(!existing->is_toplevel()); |
| if (!outer_info->is_debug() || existing->HasDebugCode()) { |
| return existing; |
| } |
| } |
| |
| // Allocate a shared function info object. |
| Handle<SharedFunctionInfo> result; |
| if (!maybe_existing.ToHandle(&result)) { |
| result = NewSharedFunctionInfoForLiteral(isolate, literal, script); |
| result->set_is_toplevel(false); |
| |
| // If the outer function has been compiled before, we cannot be sure that |
| // shared function info for this function literal has been created for the |
| // first time. It may have already been compiled previously. |
| result->set_never_compiled(outer_info->shared_info()->never_compiled()); |
| } |
| |
| Zone zone(isolate->allocator()); |
| ParseInfo parse_info(&zone, script); |
| CompilationInfo info(&parse_info, Handle<JSFunction>::null()); |
| parse_info.set_literal(literal); |
| parse_info.set_shared_info(result); |
| parse_info.set_scope(literal->scope()); |
| parse_info.set_language_mode(literal->scope()->language_mode()); |
| if (outer_info->will_serialize()) info.PrepareForSerializing(); |
| if (outer_info->is_debug()) info.MarkAsDebug(); |
| |
| // Determine if the function can be lazily compiled. This is necessary to |
| // allow some of our builtin JS files to be lazily compiled. These |
| // builtins cannot be handled lazily by the parser, since we have to know |
| // if a function uses the special natives syntax, which is something the |
| // parser records. |
| // If the debugger requests compilation for break points, we cannot be |
| // aggressive about lazy compilation, because it might trigger compilation |
| // of functions without an outer context when setting a breakpoint through |
| // Debug::FindSharedFunctionInfoInScript. |
| bool allow_lazy = literal->AllowsLazyCompilation() && !info.is_debug(); |
| bool lazy = FLAG_lazy && allow_lazy && !literal->should_eager_compile(); |
| |
| // Consider compiling eagerly when targeting the code cache. |
| lazy &= !(FLAG_serialize_eager && info.will_serialize()); |
| |
| // Consider compiling eagerly when compiling bytecode for Ignition. |
| lazy &= |
| !(FLAG_ignition && FLAG_ignition_eager && !isolate->serializer_enabled()); |
| |
| // Generate code |
| TimerEventScope<TimerEventCompileCode> timer(isolate); |
| RuntimeCallTimerScope runtimeTimer(isolate, &RuntimeCallStats::CompileCode); |
| TRACE_EVENT0("v8", "V8.CompileCode"); |
| if (lazy) { |
| info.SetCode(isolate->builtins()->CompileLazy()); |
| } else if (Renumber(info.parse_info()) && GenerateUnoptimizedCode(&info)) { |
| // Code generation will ensure that the feedback vector is present and |
| // appropriately sized. |
| DCHECK(!info.code().is_null()); |
| if (literal->should_eager_compile() && |
| literal->should_be_used_once_hint()) { |
| info.code()->MarkToBeExecutedOnce(isolate); |
| } |
| // Update the shared function info with the scope info. |
| InstallSharedScopeInfo(&info, result); |
| // Install compilation result on the shared function info. |
| InstallSharedCompilationResult(&info, result); |
| } else { |
| return Handle<SharedFunctionInfo>::null(); |
| } |
| |
| if (maybe_existing.is_null()) { |
| RecordFunctionCompilation(CodeEventListener::FUNCTION_TAG, &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_construct_stub(*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); |
| } |
| |
| void Compiler::FinalizeCompilationJob(CompilationJob* raw_job) { |
| // Take ownership of compilation job. Deleting job also tears down the zone. |
| base::SmartPointer<CompilationJob> job(raw_job); |
| CompilationInfo* info = job->info(); |
| Isolate* isolate = info->isolate(); |
| |
| VMState<COMPILER> state(isolate); |
| TimerEventScope<TimerEventRecompileSynchronous> timer(info->isolate()); |
| RuntimeCallTimerScope runtimeTimer(isolate, |
| &RuntimeCallStats::RecompileSynchronous); |
| TRACE_EVENT0("v8", "V8.RecompileSynchronous"); |
| |
| Handle<SharedFunctionInfo> shared = info->shared_info(); |
| shared->code()->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->last_status() == CompilationJob::SUCCEEDED) { |
| if (shared->optimization_disabled()) { |
| job->RetryOptimization(kOptimizationDisabled); |
| } else if (info->dependencies()->HasAborted()) { |
| job->RetryOptimization(kBailedOutDueToDependencyChange); |
| } else if (job->GenerateCode() == CompilationJob::SUCCEEDED) { |
| job->RecordOptimizationStats(); |
| RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, info); |
| if (shared->SearchOptimizedCodeMap(info->context()->native_context(), |
| info->osr_ast_id()).code == nullptr) { |
| InsertCodeIntoOptimizedCodeMap(info); |
| } |
| if (FLAG_trace_opt) { |
| PrintF("[completed optimizing "); |
| info->closure()->ShortPrint(); |
| PrintF("]\n"); |
| } |
| info->closure()->ReplaceCode(*info->code()); |
| return; |
| } |
| } |
| |
| DCHECK(job->last_status() != CompilationJob::SUCCEEDED); |
| if (FLAG_trace_opt) { |
| PrintF("[aborted optimizing "); |
| info->closure()->ShortPrint(); |
| PrintF(" because: %s]\n", GetBailoutReason(info->bailout_reason())); |
| } |
| info->closure()->ReplaceCode(shared->code()); |
| } |
| |
| void Compiler::PostInstantiation(Handle<JSFunction> function, |
| PretenureFlag pretenure) { |
| Handle<SharedFunctionInfo> shared(function->shared()); |
| |
| if (FLAG_always_opt && shared->allows_lazy_compilation()) { |
| function->MarkForOptimization(); |
| } |
| |
| CodeAndLiterals cached = shared->SearchOptimizedCodeMap( |
| function->context()->native_context(), BailoutId::None()); |
| if (cached.code != nullptr) { |
| // Caching of optimized code enabled and optimized code found. |
| DCHECK(!cached.code->marked_for_deoptimization()); |
| DCHECK(function->shared()->is_compiled()); |
| function->ReplaceCode(cached.code); |
| } |
| |
| if (cached.literals != nullptr) { |
| DCHECK(shared->is_compiled()); |
| function->set_literals(cached.literals); |
| } else if (shared->is_compiled()) { |
| // TODO(mvstanton): pass pretenure flag to EnsureLiterals. |
| JSFunction::EnsureLiterals(function); |
| } |
| } |
| |
| } // namespace internal |
| } // namespace v8 |