// Copyright 2016 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/parsing/parse-info.h" #include "src/ast/ast-source-ranges.h" #include "src/ast/ast-value-factory.h" #include "src/ast/ast.h" #include "src/base/template-utils.h" #include "src/compiler-dispatcher/compiler-dispatcher.h" #include "src/counters.h" #include "src/hash-seed-inl.h" #include "src/heap/heap-inl.h" #include "src/log.h" #include "src/objects-inl.h" #include "src/objects/scope-info.h" #include "src/zone/zone.h" namespace v8 { namespace internal { ParseInfo::ParseInfo(AccountingAllocator* zone_allocator) : zone_(base::make_unique<Zone>(zone_allocator, ZONE_NAME)), flags_(0), extension_(nullptr), script_scope_(nullptr), stack_limit_(0), hash_seed_(0), function_kind_(FunctionKind::kNormalFunction), script_id_(-1), start_position_(0), end_position_(0), parameters_end_pos_(kNoSourcePosition), function_literal_id_(FunctionLiteral::kIdTypeInvalid), max_function_literal_id_(FunctionLiteral::kIdTypeInvalid), character_stream_(nullptr), ast_value_factory_(nullptr), ast_string_constants_(nullptr), function_name_(nullptr), runtime_call_stats_(nullptr), source_range_map_(nullptr), literal_(nullptr) {} ParseInfo::ParseInfo(Isolate* isolate, AccountingAllocator* zone_allocator) : ParseInfo(zone_allocator) { set_hash_seed(HashSeed(isolate)); set_stack_limit(isolate->stack_guard()->real_climit()); set_runtime_call_stats(isolate->counters()->runtime_call_stats()); set_logger(isolate->logger()); set_ast_string_constants(isolate->ast_string_constants()); set_collect_source_positions(!FLAG_enable_lazy_source_positions || isolate->NeedsDetailedOptimizedCodeLineInfo()); if (!isolate->is_best_effort_code_coverage()) set_coverage_enabled(); if (isolate->is_block_code_coverage()) set_block_coverage_enabled(); if (isolate->is_collecting_type_profile()) set_collect_type_profile(); if (isolate->compiler_dispatcher()->IsEnabled()) { parallel_tasks_.reset(new ParallelTasks(isolate->compiler_dispatcher())); } set_might_always_opt(FLAG_always_opt || FLAG_prepare_always_opt); set_allow_lazy_compile(FLAG_lazy); set_allow_natives_syntax(FLAG_allow_natives_syntax); set_allow_harmony_public_fields(FLAG_harmony_public_fields); set_allow_harmony_static_fields(FLAG_harmony_static_fields); set_allow_harmony_dynamic_import(FLAG_harmony_dynamic_import); set_allow_harmony_import_meta(FLAG_harmony_import_meta); set_allow_harmony_numeric_separator(FLAG_harmony_numeric_separator); set_allow_harmony_private_fields(FLAG_harmony_private_fields); set_allow_harmony_private_methods(FLAG_harmony_private_methods); } ParseInfo::ParseInfo(Isolate* isolate) : ParseInfo(isolate, isolate->allocator()) { script_id_ = isolate->heap()->NextScriptId(); LOG(isolate, ScriptEvent(Logger::ScriptEventType::kReserveId, script_id_)); } template <typename T> void ParseInfo::SetFunctionInfo(T function) { set_is_named_expression(function->is_named_expression()); set_language_mode(function->language_mode()); set_function_kind(function->kind()); set_declaration(function->is_declaration()); set_requires_instance_members_initializer( function->requires_instance_members_initializer()); set_toplevel(function->is_toplevel()); set_is_oneshot_iife(function->is_oneshot_iife()); set_wrapped_as_function(function->is_wrapped()); } ParseInfo::ParseInfo(Isolate* isolate, Handle<SharedFunctionInfo> shared) : ParseInfo(isolate, isolate->allocator()) { // Do not support re-parsing top-level function of a wrapped script. // TODO(yangguo): consider whether we need a top-level function in a // wrapped script at all. DCHECK_IMPLIES(is_toplevel(), !Script::cast(shared->script())->is_wrapped()); set_allow_lazy_parsing(true); set_asm_wasm_broken(shared->is_asm_wasm_broken()); set_start_position(shared->StartPosition()); set_end_position(shared->EndPosition()); function_literal_id_ = shared->FunctionLiteralId(isolate); SetFunctionInfo(shared); Handle<Script> script(Script::cast(shared->script()), isolate); set_script(script); if (shared->HasOuterScopeInfo()) { set_outer_scope_info(handle(shared->GetOuterScopeInfo(), isolate)); } // CollectTypeProfile uses its own feedback slots. If we have existing // FeedbackMetadata, we can only collect type profile if the feedback vector // has the appropriate slots. set_collect_type_profile( isolate->is_collecting_type_profile() && (shared->HasFeedbackMetadata() ? shared->feedback_metadata()->HasTypeProfileSlot() : script->IsUserJavaScript())); } ParseInfo::ParseInfo(Isolate* isolate, Handle<Script> script) : ParseInfo(isolate, isolate->allocator()) { SetScriptForToplevelCompile(isolate, script); set_collect_type_profile(isolate->is_collecting_type_profile() && script->IsUserJavaScript()); } // static std::unique_ptr<ParseInfo> ParseInfo::FromParent( const ParseInfo* outer_parse_info, AccountingAllocator* zone_allocator, const FunctionLiteral* literal, const AstRawString* function_name) { std::unique_ptr<ParseInfo> result = base::make_unique<ParseInfo>(zone_allocator); // Replicate shared state of the outer_parse_info. result->flags_ = outer_parse_info->flags_; result->script_id_ = outer_parse_info->script_id_; result->set_logger(outer_parse_info->logger()); result->set_ast_string_constants(outer_parse_info->ast_string_constants()); result->set_hash_seed(outer_parse_info->hash_seed()); DCHECK_EQ(outer_parse_info->parameters_end_pos(), kNoSourcePosition); DCHECK_NULL(outer_parse_info->extension()); DCHECK(outer_parse_info->maybe_outer_scope_info().is_null()); // Clone the function_name AstRawString into the ParseInfo's own // AstValueFactory. const AstRawString* cloned_function_name = result->GetOrCreateAstValueFactory()->CloneFromOtherFactory( function_name); // Setup function specific details. DCHECK(!literal->is_toplevel()); result->set_function_name(cloned_function_name); result->set_start_position(literal->start_position()); result->set_end_position(literal->end_position()); result->set_function_literal_id(literal->function_literal_id()); result->SetFunctionInfo(literal); return result; } ParseInfo::~ParseInfo() = default; DeclarationScope* ParseInfo::scope() const { return literal()->scope(); } Handle<Script> ParseInfo::CreateScript(Isolate* isolate, Handle<String> source, ScriptOriginOptions origin_options, NativesFlag natives) { // Create a script object describing the script to be compiled. Handle<Script> script; if (script_id_ == -1) { script = isolate->factory()->NewScript(source); } else { script = isolate->factory()->NewScriptWithId(source, script_id_); } if (isolate->NeedsSourcePositionsForProfiling()) { Script::InitLineEnds(script); } switch (natives) { case NATIVES_CODE: script->set_type(Script::TYPE_NATIVE); break; case EXTENSION_CODE: script->set_type(Script::TYPE_EXTENSION); break; case INSPECTOR_CODE: script->set_type(Script::TYPE_INSPECTOR); break; case NOT_NATIVES_CODE: break; } script->set_origin_options(origin_options); SetScriptForToplevelCompile(isolate, script); return script; } AstValueFactory* ParseInfo::GetOrCreateAstValueFactory() { if (!ast_value_factory_.get()) { ast_value_factory_.reset( new AstValueFactory(zone(), ast_string_constants(), hash_seed())); } return ast_value_factory(); } void ParseInfo::AllocateSourceRangeMap() { DCHECK(block_coverage_enabled()); set_source_range_map(new (zone()) SourceRangeMap(zone())); } void ParseInfo::ResetCharacterStream() { character_stream_.reset(); } void ParseInfo::set_character_stream( std::unique_ptr<Utf16CharacterStream> character_stream) { DCHECK_NULL(character_stream_); character_stream_.swap(character_stream); } void ParseInfo::SetScriptForToplevelCompile(Isolate* isolate, Handle<Script> script) { set_script(script); set_allow_lazy_parsing(); set_toplevel(); set_collect_type_profile(isolate->is_collecting_type_profile() && script->IsUserJavaScript()); set_wrapped_as_function(script->is_wrapped()); } void ParseInfo::set_script(Handle<Script> script) { script_ = script; DCHECK(script_id_ == -1 || script_id_ == script->id()); script_id_ = script->id(); set_native(script->type() == Script::TYPE_NATIVE); set_eval(script->compilation_type() == Script::COMPILATION_TYPE_EVAL); set_module(script->origin_options().IsModule()); DCHECK(!(is_eval() && is_module())); if (block_coverage_enabled() && script->IsUserJavaScript()) { AllocateSourceRangeMap(); } } void ParseInfo::ParallelTasks::Enqueue(ParseInfo* outer_parse_info, const AstRawString* function_name, FunctionLiteral* literal) { base::Optional<CompilerDispatcher::JobId> job_id = dispatcher_->Enqueue(outer_parse_info, function_name, literal); if (job_id) { enqueued_jobs_.emplace_front(std::make_pair(literal, *job_id)); } } } // namespace internal } // namespace v8