Introduce per-isolate assert scopes and API to guard JS execution.

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4052 matching lines @@
     ~Scope() { isolate_->Exit(); }
 
    private:
     Isolate* const isolate_;
 
     // Prevent copying of Scope objects.
     Scope(const Scope&);
     Scope& operator=(const Scope&);
   };
 
+
+  /**
+   * Assert that no Javascript code is invoked.
+   */
+  class DisallowJavascriptExecutionScope {
+   public:
+    explicit DisallowJavascriptExecutionScope(Isolate* isolate);
+    ~DisallowJavascriptExecutionScope();
+
+   private:
+    void* internal_;
+  };

[jochen (gone - plz use gerrit), 2014/03/19 11:13:16]

can you add copy and assign declarations? (like in line 4068 above..)

+
+
+  /**
+   * Introduce exception to DisallowJavascriptExecutionScope.
+   */
+  class AllowJavascriptExecutionScope {
+   public:
+    explicit AllowJavascriptExecutionScope(Isolate* isolate);
+    ~AllowJavascriptExecutionScope();
+
+   private:
+    void* internal_;
+  };
+
   /**
    * Types of garbage collections that can be requested via
    * RequestGarbageCollectionForTesting.
    */
   enum GarbageCollectionType {
     kFullGarbageCollection,
     kMinorGarbageCollection
   };
 
   /**
@@ skipping 2500 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_