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// 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/parsing.h" #include <memory> #include "src/ast/ast.h" #include "src/execution/vm-state-inl.h" #include "src/objects/objects-inl.h" #include "src/parsing/parse-info.h" #include "src/parsing/parser.h" #include "src/parsing/scanner-character-streams.h" #include "src/zone/zone-list-inl.h" // crbug.com/v8/8816 namespace v8 { namespace internal { namespace parsing { bool ParseProgram(ParseInfo* info, Isolate* isolate, ReportErrorsAndStatisticsMode mode) { DCHECK(info->is_toplevel()); DCHECK_NULL(info->literal()); VMState<PARSER> state(isolate); // Create a character stream for the parser. Handle<String> source(String::cast(info->script()->source()), isolate); isolate->counters()->total_parse_size()->Increment(source->length()); std::unique_ptr<Utf16CharacterStream> stream( ScannerStream::For(isolate, source)); info->set_character_stream(std::move(stream)); Parser parser(info); FunctionLiteral* result = nullptr; // Ok to use Isolate here; this function is only called in the main thread. DCHECK(parser.parsing_on_main_thread_); result = parser.ParseProgram(isolate, info); info->set_literal(result); if (result) { info->set_language_mode(info->literal()->language_mode()); if (info->is_eval()) { info->set_allow_eval_cache(parser.allow_eval_cache()); } } if (mode == ReportErrorsAndStatisticsMode::kYes) { if (result == nullptr) { info->pending_error_handler()->ReportErrors(isolate, info->script(), info->ast_value_factory()); } parser.UpdateStatistics(isolate, info->script()); } return (result != nullptr); } bool ParseFunction(ParseInfo* info, Handle<SharedFunctionInfo> shared_info, Isolate* isolate, ReportErrorsAndStatisticsMode mode) { DCHECK(!info->is_toplevel()); DCHECK(!shared_info.is_null()); DCHECK_NULL(info->literal()); // Create a character stream for the parser. Handle<String> source(String::cast(info->script()->source()), isolate); isolate->counters()->total_parse_size()->Increment(source->length()); std::unique_ptr<Utf16CharacterStream> stream( ScannerStream::For(isolate, source, shared_info->StartPosition(), shared_info->EndPosition())); info->set_character_stream(std::move(stream)); VMState<PARSER> state(isolate); Parser parser(info); FunctionLiteral* result = nullptr; // Ok to use Isolate here; this function is only called in the main thread. DCHECK(parser.parsing_on_main_thread_); result = parser.ParseFunction(isolate, info, shared_info); info->set_literal(result); if (result) { info->ast_value_factory()->Internalize(isolate); if (info->is_eval()) { info->set_allow_eval_cache(parser.allow_eval_cache()); } } if (mode == ReportErrorsAndStatisticsMode::kYes) { if (result == nullptr) { info->pending_error_handler()->ReportErrors(isolate, info->script(), info->ast_value_factory()); } parser.UpdateStatistics(isolate, info->script()); } return (result != nullptr); } bool ParseAny(ParseInfo* info, Handle<SharedFunctionInfo> shared_info, Isolate* isolate, ReportErrorsAndStatisticsMode mode) { DCHECK(!shared_info.is_null()); return info->is_toplevel() ? ParseProgram(info, isolate, mode) : ParseFunction(info, shared_info, isolate, mode); } } // namespace parsing } // namespace internal } // namespace v8