/* Should the ust comm thread quit ? */
static int lttng_ust_comm_should_quit;
+/*
+ * This variable can be tested by applications to check whether
+ * lttng-ust is loaded. They simply have to define their own
+ * "lttng_ust_loaded" weak symbol, and test it. It is set to 1 by the
+ * library constructor.
+ */
+int lttng_ust_loaded __attribute__((weak));
+
/*
* Return 0 on success, -1 if should quit.
* The lock is taken in both cases.
int sock, ret, prev_connect_failed = 0, has_waited = 0;
long timeout;
+ /*
+ * If available, add '-ust' to the end of this thread's
+ * process name
+ */
+ ret = lttng_ust_setustprocname();
+ if (ret) {
+ ERR("Unable to set UST process name");
+ }
+
/* Restart trying to connect to the session daemon */
restart:
if (prev_connect_failed) {
lttng_fixup_procname_tls();
lttng_fixup_ust_mutex_nest_tls();
+ lttng_ust_loaded = 1;
+
/*
* We want precise control over the order in which we construct
* our sub-libraries vs starting to receive commands from
timeout_mode = get_constructor_timeout(&constructor_timeout);
ret = sem_init(&constructor_wait, 0, 0);
- assert(!ret);
+ if (ret) {
+ PERROR("sem_init");
+ }
ret = setup_local_apps();
if (ret) {
ret = sem_timedwait(&constructor_wait,
&constructor_timeout);
} while (ret < 0 && errno == EINTR);
- if (ret < 0 && errno == ETIMEDOUT) {
- ERR("Timed out waiting for lttng-sessiond");
- } else {
- assert(!ret);
+ if (ret < 0) {
+ switch (errno) {
+ case ETIMEDOUT:
+ ERR("Timed out waiting for lttng-sessiond");
+ break;
+ case EINVAL:
+ PERROR("sem_timedwait");
+ break;
+ default:
+ ERR("Unexpected error \"%s\" returned by sem_timedwait",
+ strerror(errno));
+ }
}
break;
case -1:/* wait forever */
do {
ret = sem_wait(&constructor_wait);
} while (ret < 0 && errno == EINTR);
- assert(!ret);
+ if (ret < 0) {
+ switch (errno) {
+ case EINVAL:
+ PERROR("sem_wait");
+ break;
+ default:
+ ERR("Unexpected error \"%s\" returned by sem_wait",
+ strerror(errno));
+ }
+ }
break;
case 0: /* no timeout */
break;
{
cleanup_sock_info(&global_apps, exiting);
cleanup_sock_info(&local_apps, exiting);
+ local_apps.allowed = 0;
/*
* The teardown in this function all affect data structures
* accessed under the UST lock by the listener thread. This
{
if (URCU_TLS(lttng_ust_nest_count))
return;
+ lttng_context_vtid_reset();
DBG("process %d", getpid());
/* Release urcu mutexes */
rcu_bp_after_fork_child();
lttng_ust_cleanup(0);
- lttng_context_vtid_reset();
/* Release mutexes and reenable signals */
ust_after_fork_common(restore_sigset);
lttng_ust_init();