void signal_io (IDTYPE target, void * arg) { debug("detecting input, signaling thread %u\n", target); struct shim_thread * thread = lookup_thread(target); if (!thread) return; append_signal(thread, SIGIO, NULL, true); }
void signal_alarm (IDTYPE target, void * arg) { debug("alarm goes off, signaling thread %u\n", target); struct shim_thread * thread = lookup_thread(target); if (!thread) return; append_signal(thread, SIGALRM, NULL, true); }
int thread_exit(struct shim_thread * self, bool send_ipc) { /* Chia-Che: Broadcast exit message as early as possible, so other process can start early on responding. */ if (self->in_vm && send_ipc) ipc_cld_exit_send(self->ppid, self->tid, self->exit_code, self->term_signal); lock(&self->lock); if (!self->is_alive) { debug("thread %d is dead\n", self->tid); out: unlock(&self->lock); return 0; } #ifdef PROFILE self->exit_time = GET_PROFILE_INTERVAL(); #endif int exit_code = self->exit_code; self->is_alive = false; if (is_internal(self)) goto out; struct shim_handle_map * handle_map = self->handle_map; struct shim_handle * exec = self->exec; struct shim_thread * parent = self->parent; self->handle_map = NULL; self->exec = NULL; if (parent) { assert(parent != self); assert(parent->child_exit_event); debug("thread exits, notifying thread %d\n", parent->tid); lock(&parent->lock); LISTP_DEL_INIT(self, &parent->children, siblings); LISTP_ADD_TAIL(self, &parent->exited_children, siblings); if (!self->in_vm) { debug("deliver SIGCHLD (thread = %d, exitval = %d)\n", self->tid, exit_code); siginfo_t info; memset(&info, 0, sizeof(siginfo_t)); info.si_signo = SIGCHLD; info.si_pid = self->tid; info.si_uid = self->uid; info.si_status = (exit_code & 0xff) << 8; append_signal(parent, SIGCHLD, &info, true); } unlock(&parent->lock); DkEventSet(parent->child_exit_event); } else { debug("parent not here, need to tell another process\n"); ipc_cld_exit_send(self->ppid, self->tid, self->exit_code, self->term_signal); } struct robust_list_head * robust_list = (void *) self->robust_list; self->robust_list = NULL; unlock(&self->lock); if (handle_map) put_handle_map(handle_map); if (exec) put_handle(exec); if (robust_list) release_robust_list(robust_list); if (self->clear_child_tid) release_clear_child_id (self->clear_child_tid); DkEventSet(self->exit_event); return 0; }