Reland of "v8::TryCatch now works correctly with ASAN's UseAfterReturn mode enabled."

include/v8.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.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 5057 matching lines @@
    */
   void SetVerbose(bool value);
 
   /**
    * Set whether or not this TryCatch should capture a Message object
    * which holds source information about where the exception
    * occurred.  True by default.
    */
   void SetCaptureMessage(bool value);
 
+  /**
+   * There are cases when the raw address of C++ TryCatch object cannot be
+   * used for comparisons with addresses into the JS stack. The cases are:
+   * 1) ARM, ARM64 and MIPS simulators which have separate JS stack.
+   * 2) Address sanitizer allocates local C++ object in the heap when
+   *    UseAfterReturn mode is enabled.
+   * This method returns address that can be used for comparisons with
+   * addresses into the JS stack. When neither simulator nor ASAN's
+   * UseAfterReturn is enabled, then the address returned will be the address
+   * of the C++ try catch handler itself.
+   */
+  static void* JSStackComparableAddress(v8::TryCatch* handler) {
+    if (handler == NULL) return NULL;
+    return handler->js_stack_comparable_address_;
+  }
+
  private:
   // Make it hard to create heap-allocated TryCatch blocks.
   TryCatch(const TryCatch&);
   void operator=(const TryCatch&);
   void* operator new(size_t size);
   void operator delete(void*, size_t);
 
   v8::internal::Isolate* isolate_;
-  void* next_;
+  v8::TryCatch* next_;
   void* exception_;
   void* message_obj_;
   void* message_script_;
+  void* js_stack_comparable_address_;
   int message_start_pos_;
   int message_end_pos_;
   bool is_verbose_ : 1;
   bool can_continue_ : 1;
   bool capture_message_ : 1;
   bool rethrow_ : 1;
   bool has_terminated_ : 1;
 
   friend class v8::internal::Isolate;
 };
@@ skipping 1518 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_