378 

   378 

   379 

   379 

   380 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) {

   380 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) {

   381   // There are potential race conditions during exception cache updates, so we

   381   // There are potential race conditions during exception cache updates, so we

   382   // must own the ExceptionCache_lock before doing ANY modifications. Because

   382   // must own the ExceptionCache_lock before doing ANY modifications. Because

   384   // to update the cache with the same data. We need to check for already inserted

   384   // to update the cache with the same data. We need to check for already inserted

   385   // copies of the current data before adding it.

   385   // copies of the current data before adding it.

   386 

   386 

   387   MutexLocker ml(ExceptionCache_lock);

   387   MutexLocker ml(ExceptionCache_lock);

   388   ExceptionCache* target_entry = exception_cache_entry_for_exception(exception);

   388   ExceptionCache* target_entry = exception_cache_entry_for_exception(exception);