private int attemptToReadProcessId() {
    int processId = -1;
    try {
      processId = OSProcess.getId();
    } catch (VirtualMachineError err) {
      SystemFailure.initiateFailure(err);
      // If this ever returns, rethrow the error. We're poisoned
      // now, so don't let this thread continue.
      throw err;
    } catch (Throwable t) {
      // Whenever you catch Error or Throwable, you must also
      // catch VirtualMachineError (see above). However, there is
      // _still_ a possibility that you are dealing with a cascading
      // error condition, so you also need to check to see if the JVM
      // is still usable:
      SystemFailure.checkFailure();
    }
    return processId;
  }
@return The PID of the current process, or -1 if the PID cannot be determined.
geode-core/src/main/java/org/apache/geode/internal/logging/Banner.java