Developer Guide

  • 10/27/2020
  • Public Content

Error Handling and Recovery

One of the main aspects of trusted application validation is the negative validation of both the functional side and management side:
  • Informative error reports
     - trusted application code should handle all possible errors that might occur due to invalid usage of the trusted application. In addition it should return some usable errors to the host-side for further error handling. The correct way to do so is via the relevant methods for error passing . Using different errors and values for various cases and states is recommended mostly since the debugging capabilities in production setups are very limited!
  • Handling exceptions
     – Besides the exceptions, which are defined in the relevant APIs, additional run-time exceptions might occur. These should be taken into account during reviews and validation (e.g. nullPointerException or ArrayOutOfBoundsException). In addition, verifying that call-back functions handle all exceptions is also recommended, since an exception there will not be caught by the trusted application if it is thrown from the scope of the call-back.
Validation needs to cover the difference between what is returned by the trusted application versus error messages from the VM.

Product and Performance Information


Performance varies by use, configuration and other factors. Learn more at