| // 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/heap/heap-inl.h" |
| #include "src/logging/counters.h" |
| #include "src/logging/log.h" |
| #include "src/numbers/hash-seed-inl.h" |
| #include "src/objects/objects-inl.h" |
| #include "src/objects/scope-info.h" |
| #include "src/zone/zone.h" |
| |
| #if V8_OS_STARBOARD |
| #include "src/poems.h" |
| #endif |
| |
| 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_(kFunctionLiteralIdInvalid), |
| max_function_literal_id_(kFunctionLiteralIdInvalid), |
| 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_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_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->function_literal_id(); |
| 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 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_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 |