Add inspection of whether frame is a construct frame to optimized frames

src/debug.cc

 // Copyright 2011 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 1803 matching lines @@
     // care of the case where the last break point is removed from the function
     // and therefore no "original code" is available.
     thread_local_.after_break_target_ = Assembler::target_address_at(addr);
   }
 }
 
 
 bool Debug::IsBreakAtReturn(JavaScriptFrame* frame) {
   HandleScope scope(isolate_);
 
+  // If there are no break points this cannot be break at return, as
+  // the debugger statement and stack guard bebug break cannot be at
+  // return.
+  if (!has_break_points_) {
+    return false;
+  }
+
   // Get the executing function in which the debug break occurred.
   Handle<SharedFunctionInfo> shared =
       Handle<SharedFunctionInfo>(JSFunction::cast(frame->function())->shared());
   if (!EnsureDebugInfo(shared)) {
     // Return if we failed to retrieve the debug info.
     return false;
   }
   Handle<DebugInfo> debug_info = GetDebugInfo(shared);
   Handle<Code> code(debug_info->code());
 #ifdef DEBUG
@@ skipping 1288 matching lines @@
     {
       Locker locker;
       Isolate::Current()->debugger()->CallMessageDispatchHandler();
     }
   }
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal