*** old/src/cpu/x86/vm/frame_x86.cpp	Mon Feb 18 12:53:08 2013
--- new/src/cpu/x86/vm/frame_x86.cpp	Mon Feb 18 12:53:08 2013

*** 95,127 ****
--- 95,128 ----
      // ok. adapter blobs never have a frame complete and are never ok.
  
      // check for a valid frame_size, otherwise we are unlikely to get a valid sender_pc
  
      if (!Interpreter::contains(_pc) && _cb->frame_size() <= 0) {
        //assert(0, "Invalid frame_size");
        return false;
      }
  
      if (!_cb->is_frame_complete_at(_pc)) {
        if (_cb->is_nmethod() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) {
          return false;
        }
      }
+ 
+     // Could just be some random pointer within the codeBlob
+     if (!_cb->code_contains(_pc)) {
+       return false;
+     }
+ 
      // Entry frame checks
      if (is_entry_frame()) {
        // an entry frame must have a valid fp.
  
        if (!fp_safe) return false;
  
        // Validate the JavaCallWrapper an entry frame must have
  
        address jcw = (address)entry_frame_call_wrapper();
  
        bool jcw_safe = (jcw < thread->stack_base()) && ( jcw > fp);
  
        return jcw_safe;
  
      }
  
      intptr_t* sender_sp = NULL;
      address   sender_pc = NULL;