Parsing: Make Parser not know about Isolate during background parsing.

src/parser.h

 // 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.
 
 #ifndef V8_PARSER_H_
 #define V8_PARSER_H_
 
 #include "src/allocation.h"
 #include "src/ast.h"
 #include "src/compiler.h"  // For CachedDataMode
@@ skipping 644 matching lines @@
   // Parses the source code represented by the compilation info and sets its
   // function literal.  Returns false (and deallocates any allocated AST
   // nodes) if parsing failed.
   static bool Parse(CompilationInfo* info,
                     bool allow_lazy = false) {
     ParseInfo parse_info = {info->isolate()->stack_guard()->real_climit(),
                             info->isolate()->heap()->HashSeed(),
                             info->isolate()->unicode_cache()};
     Parser parser(info, &parse_info);
     parser.set_allow_lazy(allow_lazy);
-    if (parser.Parse()) {
+    if (parser.ParseOnMainThread(info)) {
       info->SetLanguageMode(info->function()->language_mode());
       return true;
     }
     return false;
   }
-  bool Parse();
-  void ParseOnBackground();
+  bool ParseOnMainThread(CompilationInfo* info);
+  void ParseOnBackground(CompilationInfo* info);
 
   // Handle errors detected during parsing, move statistics to Isolate,
   // internalize strings (move them to the heap).
-  void Internalize();
-  void HandleSourceURLComments();
+  void Internalize(CompilationInfo* info);
+  void HandleSourceURLComments(CompilationInfo* info);
 
  private:
   friend class ParserTraits;
 
   // Limit the allowed number of local variables in a function. The hard limit
   // is that offsets computed by FullCodeGenerator::StackOperand and similar
   // functions are ints, and they should not overflow. In addition, accessing
   // local variables creates user-controlled constants in the generated code,
   // and we don't want too much user-controlled memory inside the code (this was
   // the reason why this limit was introduced in the first place; see
   // https://codereview.chromium.org/7003030/ ).
   static const int kMaxNumFunctionLocals = 4194303;  // 2^22-1
 
   enum VariableDeclarationContext {
     kStatementListItem,
     kStatement,
     kForStatement
   };
 
   // If a list of variable declarations includes any initializers.
   enum VariableDeclarationProperties {
     kHasInitializers,
     kHasNoInitializers
   };
 
   // Returns NULL if parsing failed.
-  FunctionLiteral* ParseProgram();
+  FunctionLiteral* ParseProgram(CompilationInfo* info);
 
-  FunctionLiteral* ParseLazy();
-  FunctionLiteral* ParseLazy(Utf16CharacterStream* source);
-
-  Isolate* isolate() { return info_->isolate(); }
-  CompilationInfo* info() const { return info_; }
-  Handle<Script> script() const { return info_->script(); }
+  FunctionLiteral* ParseLazy(CompilationInfo* info);
+  FunctionLiteral* ParseLazy(CompilationInfo* info,
+                             Utf16CharacterStream* source);
 
   // Called by ParseProgram after setting up the scanner.
   FunctionLiteral* DoParseProgram(CompilationInfo* info, Scope** scope,
                                   Scope** ad_hoc_eval_scope);
 
-  void SetCachedData();
+  void SetCachedData(CompilationInfo* info);
 
   bool inside_with() const { return scope_->inside_with(); }
   ScriptCompiler::CompileOptions compile_options() const {
-    return info_->compile_options();
+    return compile_options_;
   }
   bool consume_cached_parse_data() const {
-    return compile_options() == ScriptCompiler::kConsumeParserCache &&
+    return compile_options_ == ScriptCompiler::kConsumeParserCache &&
            cached_parse_data_ != NULL;
   }
   bool produce_cached_parse_data() const {
-    return compile_options() == ScriptCompiler::kProduceParserCache;
+    return compile_options_ == ScriptCompiler::kProduceParserCache;
   }
   Scope* DeclarationScope(VariableMode mode) {
     return IsLexicalVariableMode(mode)
         ? scope_ : scope_->DeclarationScope();
   }
 
   // All ParseXXX functions take as the last argument an *ok parameter
   // which is set to false if parsing failed; it is unchanged otherwise.
   // By making the 'exception handling' explicit, we are forced to check
   // for failure at the call sites.
@@ skipping 113 matching lines @@
                             bool* ok);
 
   PreParser::PreParseResult ParseLazyFunctionBodyWithPreParser(
       SingletonLogger* logger);
 
   // Consumes the ending }.
   ZoneList<Statement*>* ParseEagerFunctionBody(
       const AstRawString* function_name, int pos, Variable* fvar,
       Token::Value fvar_init_op, FunctionKind kind, bool* ok);
 
-  void ThrowPendingError();
+  void ThrowPendingError(Isolate* isolate, Handle<Script> script);
 
   TemplateLiteralState OpenTemplateLiteral(int pos);
   void AddTemplateSpan(TemplateLiteralState* state, bool tail);
   void AddTemplateExpression(TemplateLiteralState* state,
                              Expression* expression);
   Expression* CloseTemplateLiteral(TemplateLiteralState* state, int start,
                                    Expression* tag);
   uint32_t ComputeTemplateLiteralHash(const TemplateLiteral* lit);
 
   Scanner scanner_;
   PreParser* reusable_preparser_;
   Scope* original_scope_;  // for ES5 function declarations in sloppy eval
   Target* target_stack_;  // for break, continue statements
+  ScriptCompiler::CompileOptions compile_options_;
   ParseData* cached_parse_data_;
 
-  CompilationInfo* info_;
   bool parsing_lazy_arrow_parameters_;  // for lazily parsed arrow functions.
 
   // Pending errors.
   bool has_pending_error_;
   Scanner::Location pending_error_location_;
   const char* pending_error_message_;
   const AstRawString* pending_error_arg_;
   const char* pending_error_char_arg_;
   bool pending_error_is_reference_error_;
 
@@ skipping 89 matching lines @@
 }
 
 
 Expression* ParserTraits::CloseTemplateLiteral(TemplateLiteralState* state,
                                                int start, Expression* tag) {
   return parser_->CloseTemplateLiteral(state, start, tag);
 }
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_