6631248: Memory problem when doing invalid type cast

Summary: Changed memory allocation method for exception method
Reviewed-by: ysr, never

hotspot/src/share/vm/runtime/sharedRuntime.cpp

@@ -1481,11 +1481,9 @@ char* SharedRuntime::generate_class_cast_message(
   const char* desc = " cannot be cast to ";
   size_t msglen = strlen(objName) + strlen(desc) + strlen(targetKlassName) + 1;
 
-  char* message = NEW_C_HEAP_ARRAY(char, msglen);
+  char* message = NEW_RESOURCE_ARRAY(char, msglen);
   if (NULL == message) {
-    // out of memory - can't use a detailed message.  Since caller is
-    // using a resource mark to free memory, returning this should be
-    // safe (caller won't explicitly delete it).
+    // Shouldn't happen, but don't cause even more problems if it does
     message = const_cast<char*>(objName);
   } else {
     jio_snprintf(message, msglen, "%s%s%s", objName, desc, targetKlassName);