Add script streaming API

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 586 matching lines @@
   V8_INLINE void CheckConflictingVarDeclarations(v8::internal::Scope* scope,
                                                  bool* ok);
 
  private:
   Parser* parser_;
 };
 
 
 class Parser : public ParserBase<ParserTraits> {
  public:
-  explicit Parser(CompilationInfo* info);
+  Parser(CompilationInfo* info, uintptr_t stack_limit, uint32_t hash_seed);
   ~Parser() {
     delete reusable_preparser_;
     reusable_preparser_ = NULL;
     delete cached_parse_data_;
     cached_parse_data_ = NULL;
   }
 
   // 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) {
-    Parser parser(info);
+    Parser parser(info, info->isolate()->stack_guard()->real_climit(),
+                  info->isolate()->heap()->HashSeed());
     parser.set_allow_lazy(allow_lazy);
     return parser.Parse();
   }
   bool Parse();
+  void ParseOnBackground();
 
  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
@@ skipping 18 matching lines @@
 
   FunctionLiteral* ParseLazy();
   FunctionLiteral* ParseLazy(Utf16CharacterStream* source);
 
   Isolate* isolate() { return isolate_; }
   CompilationInfo* info() const { return info_; }
 
   // Called by ParseProgram after setting up the scanner.
   FunctionLiteral* DoParseProgram(CompilationInfo* info,
                                   Handle<String> source);
+  FunctionLiteral* DoParseProgramInner(CompilationInfo* info, Scope** scope,
+                                       Scope** ad_hoc_eval_scope);
 
   void SetCachedData();
 
   bool inside_with() const { return scope_->inside_with(); }
   ScriptCompiler::CompileOptions compile_options() const {
     return info_->compile_options();
   }
   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.
   void* ParseSourceElements(ZoneList<Statement*>* processor, int end_token,
-                            bool is_eval, bool is_global, bool* ok);
+                            bool is_eval, bool is_global,
+                            Scope** ad_hoc_eval_scope, bool* ok);
   Statement* ParseModuleElement(ZoneList<const AstRawString*>* labels,
                                 bool* ok);
   Statement* ParseModuleDeclaration(ZoneList<const AstRawString*>* names,
                                     bool* ok);
   Module* ParseModule(bool* ok);
   Module* ParseModuleLiteral(bool* ok);
   Module* ParseModulePath(bool* ok);
   Module* ParseModuleVariable(bool* ok);
   Module* ParseModuleUrl(bool* ok);
   Module* ParseModuleSpecifier(bool* ok);
@@ skipping 129 matching lines @@
 
   // 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_;
 
   int use_counts_[v8::Isolate::kUseCounterFeatureCount];
+
+  uint32_t hash_seed_;
 };
 
 
 bool ParserTraits::IsFutureStrictReserved(
     const AstRawString* identifier) const {
   return identifier->IsOneByteEqualTo("yield") ||
          parser_->scanner()->IdentifierIsFutureStrictReserved(identifier);
 }
 
 
@@ skipping 58 matching lines @@
  private:
   static const int kLiteralTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_