Fix for musl target in pthread_kill

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

@@ -996,7 +996,7 @@ impl EnclaveState {
 
         for handler in join_handlers {
             #[cfg(unix)]
-            unsafe { libc::pthread_kill(handler.as_pthread_t(), signal::SIGUSR1 as _); }
+            unsafe { libc::pthread_kill(handler.as_pthread_t() as _, signal::SIGUSR1 as _); }
             let _ = handler.join();
         }
         return main_result;

intel-sgx/fortanix-sgx-tools/src/bin/ftxsgx-runner.rs

@@ -58,15 +58,14 @@ fn catch_sigusr1() {
             let is_enclu = ENCLU.iter().enumerate().all(|(idx, v)| {
                 unsafe { *instruction_ptr.offset(idx as isize) == *v }
             });
-            let _ = stderr().flush();
             if is_enclu {
                 // At enclu instruction - force IP to the next instruction after enclu
                 unsafe { (*(_context as *mut ucontext_t)).uc_mcontext.gregs[REG_RIP as usize] += 3 }
                 eprintln!("Enclave thread {:?} hanged and aboarted by the signal", std::thread::current().id());
             }
+            let _ = stderr().flush();
         }
-
-        // POC: Need to think about what signal to send & hook
+
         let hdl = signal::SigHandler::SigAction(handle_sigusr1);
         let sig_action = signal::SigAction::new(hdl, signal::SaFlags::empty(), signal::SigSet::empty());
         signal::sigaction(signal::SIGUSR1, &sig_action).unwrap();