int NaClWaitForMainThreadToExit(struct NaClApp *nap) {
NaClLog(3, "NaClWaitForMainThreadToExit: taking NaClApp lock\n");
NaClXMutexLock(&nap->mu);
NaClLog(3, " waiting for exit status\n");
while (nap->running) {
NaClXCondVarWait(&nap->cv, &nap->mu);
NaClLog(3, " wakeup, nap->running %d, nap->exit_status %d\n",
nap->running, nap->exit_status);
}
NaClXMutexUnlock(&nap->mu);
/*
* Some thread invoked the exit (exit_group) syscall.
*/
if (NULL != nap->debug_stub_callbacks) {
nap->debug_stub_callbacks->process_exit_hook();
}
return NACL_ABI_WEXITSTATUS(nap->exit_status);
}
int NaClReportExitStatus(struct NaClApp *nap, int exit_status) {
int rv = 0;
NaClSrpcError rpc_result;
NaClXMutexLock(&nap->mu);
/*
* If several threads are exiting/reporting signals at once, we should
* let only one thread to pass through. This way we can use exit code
* without synchronization once we know that running==0.
*/
if (!nap->running) {
NaClXMutexUnlock(&nap->mu);
return 0;
}
if (NACL_REVERSE_CHANNEL_INITIALIZED ==
nap->reverse_channel_initialization_state) {
/* TODO(halyavin) update NaCl plugin to accept full exit_status value */
if (NACL_ABI_WIFEXITED(exit_status)) {
rpc_result = NaClSrpcInvokeBySignature(&nap->reverse_channel,
NACL_REVERSE_CONTROL_REPORT_STATUS,
NACL_ABI_WEXITSTATUS(exit_status));
rv = NACL_SRPC_RESULT_OK == rpc_result;
}
/*
* Due to cross-repository checkins, the Cr-side might not yet
* implement this RPC. We return whether shutdown was reported.
*/
}
nap->exit_status = exit_status;
nap->running = 0;
NaClXCondVarSignal(&nap->cv);
NaClXMutexUnlock(&nap->mu);
return rv;
}
