Make sure secondary thread panics are also forwarded

Author: Arash Sahebolamri

intel-sgx/enclave-runner/src/usercalls/mod.rs

@@ -872,7 +872,7 @@ impl EnclaveState {
         io_queue_send: tokio::sync::mpsc::UnboundedSender<UsercallSendData>,
         work_sender: crossbeam::channel::Sender<Work>,
     ) -> EnclaveResult {
-        let (tx_return_channel, mut rx_return_channel) = tokio::sync::mpsc::unbounded_channel();
+        let (tx_return_channel, mut rx_return_channel) = tokio::sync::mpsc::unbounded_channel::<(EnclaveResult, ReturnSource)>();
         let enclave_clone = enclave.clone();
         let mut rt = RuntimeBuilder::new_current_thread()
             .enable_all()
@@ -888,13 +888,12 @@ impl EnclaveState {
 
                     (e, ReturnSource::Library) |
                     (e, ReturnSource::ExecutableMain) |
-                    (e @ Err(EnclaveAbort::Exit { panic: None }), _)
+                    (e @ Err(EnclaveAbort::Exit { panic: _ }), _)
                         => e,
 
                     (Ok(_), ReturnSource::AsyncUsercall) |
                     (Err(EnclaveAbort::MainReturned), ReturnSource::AsyncUsercall) => unreachable!(),
 
-                    (Err(e @ EnclaveAbort::Exit { panic: Some(_) }), _) |
                     (Err(e @ EnclaveAbort::InvalidUsercall(_)), _) => {
                         let e = e.map_panic(|opt| opt.unwrap());
                         let cmd = enclave_clone.kind.as_command().unwrap();