[Interpreter] Avoid accessing Isolate from during bytecode generation.

src/interpreter/bytecode-generator.h

Index: src/interpreter/bytecode-generator.h
diff --git a/src/interpreter/bytecode-generator.h b/src/interpreter/bytecode-generator.h
index 573ad673efce2cd1f8968e25957824a088c4fb5e..ef5256722cd1103c483dc987aa01512f57f456e2 100644
--- a/src/interpreter/bytecode-generator.h
+++ b/src/interpreter/bytecode-generator.h
@@ -34,6 +34,11 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
   void VisitDeclarations(ZoneList<Declaration*>* declarations);
   void VisitStatements(ZoneList<Statement*>* statments);
 
+  void set_isolate_access_allowed(bool isolate_access_allowed) {
+    isolate_access_allowed_ = isolate_access_allowed;
+  }
+  bool isolate_access_allowed() { return isolate_access_allowed_; }
+
  private:
   class AccumulatorResultScope;
   class ContextScope;
@@ -177,7 +182,10 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
   void InitializeWithConsecutiveRegisters(Register (&registers)[N]);
 
   inline BytecodeArrayBuilder* builder() const { return builder_; }
-  inline Isolate* isolate() const { return isolate_; }
+  inline Isolate* isolate() const {
+    DCHECK(isolate_access_allowed_);
+    return isolate_;
+  }
   inline Zone* zone() const { return zone_; }
   inline DeclarationScope* scope() const { return scope_; }
   inline CompilationInfo* info() const { return info_; }
@@ -206,23 +214,33 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
   inline LanguageMode language_mode() const;
   int feedback_index(FeedbackVectorSlot slot) const;
 
+  Handle<Name> home_object_symbol() const { return home_object_symbol_; }
+  Handle<Name> prototype_string() const { return prototype_string_; }
+
   Isolate* isolate_;
   Zone* zone_;
   BytecodeArrayBuilder* builder_;
   CompilationInfo* info_;
   DeclarationScope* scope_;
+  bool isolate_access_allowed_;
+
   GlobalDeclarationsBuilder* globals_builder_;
   ZoneVector<GlobalDeclarationsBuilder*> global_declarations_;
   ZoneVector<std::pair<FunctionLiteral*, size_t>> function_literals_;
   ZoneVector<std::pair<NativeFunctionLiteral*, size_t>>
       native_function_literals_;
+
   ControlScope* execution_control_;
   ContextScope* execution_context_;
   ExpressionResultScope* execution_result_;
   RegisterAllocationScope* register_allocator_;
+
   ZoneVector<BytecodeLabel> generator_resume_points_;
   Register generator_state_;
   int loop_depth_;
+
+  Handle<Name> home_object_symbol_;
+  Handle<Name> prototype_string_;
 };
 
 }  // namespace interpreter