Fix: status_loc argument of waitpid() is used on error

[lttng-tools.git] / src / bin / lttng-sessiond / main.c

diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index 1964fe0cca3b80e57b8293d00aa12cfb92d18790..0df0b1f2e04bc4601149088740b6feec2b0bfdb2 100644 (file)
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -564,8 +564,7 @@ static void wait_consumer(struct consumer_data *consumer_data)
        ret = waitpid(consumer_data->pid, &status, 0);
        if (ret == -1) {
                PERROR("consumerd waitpid pid: %d", consumer_data->pid)
-       }
-       if (!WIFEXITED(status)) {
+       } else  if (!WIFEXITED(status)) {
                ERR("consumerd termination with error: %d",
                                WEXITSTATUS(ret));
        }
@@ -1855,6 +1854,8 @@ static void *thread_dispatch_ust_registration(void *data)
                .count = 0,
        };
 
+       rcu_register_thread();
+
        health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH);
 
        if (testpoint(sessiond_thread_app_reg_dispatch)) {
@@ -2088,6 +2089,7 @@ error_testpoint:
                ERR("Health error occurred in %s", __func__);
        }
        health_unregister(health_sessiond);
+       rcu_unregister_thread();
        return NULL;
 }
 
@@ -3058,7 +3060,6 @@ static int process_client_msg(struct command_ctx *cmd_ctx, int sock,
        case LTTNG_CREATE_SESSION:
        case LTTNG_CREATE_SESSION_SNAPSHOT:
        case LTTNG_CREATE_SESSION_LIVE:
-       case LTTNG_CALIBRATE:
        case LTTNG_LIST_SESSIONS:
        case LTTNG_LIST_TRACEPOINTS:
        case LTTNG_LIST_SYSCALLS:
@@ -3900,12 +3901,6 @@ error_add_context:
                ret = LTTNG_OK;
                break;
        }
-       case LTTNG_CALIBRATE:
-       {
-               ret = cmd_calibrate(cmd_ctx->lsm->domain.type,
-                               &cmd_ctx->lsm->u.calibrate);
-               break;
-       }
        case LTTNG_REGISTER_CONSUMER:
        {
                struct consumer_data *cdata;
@@ -4332,7 +4327,7 @@ error:
        }
 
        lttng_poll_clean(&events);
-
+       stop_threads();
        rcu_unregister_thread();
        return NULL;
 }
@@ -5370,9 +5365,6 @@ error:
 static void sighandler(int sig)
 {
        switch (sig) {
-       case SIGPIPE:
-               DBG("SIGPIPE caught");
-               return;
        case SIGINT:
                DBG("SIGINT caught");
                stop_threads();
@@ -5404,9 +5396,10 @@ static int set_signal_handler(void)
                return ret;
        }
 
-       sa.sa_handler = sighandler;
        sa.sa_mask = sigset;
        sa.sa_flags = 0;
+
+       sa.sa_handler = sighandler;
        if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
                PERROR("sigaction");
                return ret;
@@ -5417,12 +5410,13 @@ static int set_signal_handler(void)
                return ret;
        }
 
-       if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) {
+       if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) {
                PERROR("sigaction");
                return ret;
        }
 
-       if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) {
+       sa.sa_handler = SIG_IGN;
+       if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) {
                PERROR("sigaction");
                return ret;
        }
@@ -6155,6 +6149,12 @@ exit_client:
 exit_health:
 
 exit_init_data:
+       /*
+        * Wait for all pending call_rcu work to complete before tearing
+        * down data structures. call_rcu worker may be trying to
+        * perform lookups in those structures.
+        */
+       rcu_barrier();
        /*
         * sessiond_cleanup() is called when no other thread is running, except
         * the ht_cleanup thread, which is needed to destroy the hash tables.