Cleanup: remove dead assignment

[lttng-tools.git] / src / common / consumer / consumer.c

diff --git a/src/common/consumer/consumer.c b/src/common/consumer/consumer.c
index 3b857dec3779bc82ce7e587c75448f5b4ac4c07f..ccf9b40386ab306b8130ea073b62d8a07bd343e7 100644 (file)
--- a/src/common/consumer/consumer.c
+++ b/src/common/consumer/consumer.c
@@ -67,13 +67,16 @@ struct consumer_channel_msg {
        uint64_t key;                           /* del */
 };
 
+/* Flag used to temporarily pause data consumption from testpoints. */
+int data_consumption_paused;
+
 /*
  * Flag to inform the polling thread to quit when all fd hung up. Updated by
  * the consumer_thread_receive_fds when it notices that all fds has hung up.
  * Also updated by the signal handler (consumer_should_exit()). Read by the
  * polling threads.
  */
-volatile int consumer_quit;
+int consumer_quit;
 
 /*
  * Global hash table containing respectively metadata and data streams. The
@@ -1224,7 +1227,7 @@ void lttng_consumer_should_exit(struct lttng_consumer_local_data *ctx)
 {
        ssize_t ret;
 
-       consumer_quit = 1;
+       CMM_STORE_SHARED(consumer_quit, 1);
        ret = lttng_write(ctx->consumer_should_quit[1], "4", 1);
        if (ret < 1) {
                PERROR("write consumer quit");
@@ -2523,13 +2526,16 @@ void *consumer_thread_data_poll(void *data)
                pthread_mutex_unlock(&consumer_data.lock);
 
                /* No FDs and consumer_quit, consumer_cleanup the thread */
-               if (nb_fd == 0 && consumer_quit == 1) {
+               if (nb_fd == 0 && CMM_LOAD_SHARED(consumer_quit) == 1) {
                        err = 0;        /* All is OK */
                        goto end;
                }
                /* poll on the array of fds */
        restart:
                DBG("polling on %d fd", nb_fd + 2);
+               if (testpoint(consumerd_thread_data_poll)) {
+                       goto end;
+               }
                health_poll_entry();
                num_rdy = poll(pollfd, nb_fd + 2, -1);
                health_poll_exit();
@@ -2549,6 +2555,12 @@ void *consumer_thread_data_poll(void *data)
                        goto end;
                }
 
+               if (caa_unlikely(data_consumption_paused)) {
+                       DBG("Data consumption paused, sleeping...");
+                       sleep(1);
+                       goto restart;
+               }
+
                /*
                 * If the consumer_data_pipe triggered poll go directly to the
                 * beginning of the loop to update the array. We want to prioritize
@@ -3191,7 +3203,7 @@ void *consumer_thread_sessiond_poll(void *data)
                        err = 0;
                        goto end;
                }
-               if (consumer_quit) {
+               if (CMM_LOAD_SHARED(consumer_quit)) {
                        DBG("consumer_thread_receive_fds received quit from signal");
                        err = 0;        /* All is OK */
                        goto end;
@@ -3216,7 +3228,7 @@ end:
         * when all fds have hung up, the polling thread
         * can exit cleanly
         */
-       consumer_quit = 1;
+       CMM_STORE_SHARED(consumer_quit, 1);
 
        /*
         * Notify the data poll thread to poll back again and test the
@@ -3370,7 +3382,6 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type,
                /* Not found. Allocate one. */
                relayd = consumer_allocate_relayd_sock_pair(net_seq_idx);
                if (relayd == NULL) {
-                       ret = -ENOMEM;
                        ret_code = LTTCOMM_CONSUMERD_ENOMEM;
                        goto error;
                } else {
@@ -3403,14 +3414,12 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type,
        if (ret) {
                /* Needing to exit in the middle of a command: error. */
                lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR);
-               ret = -EINTR;
                goto error_nosignal;
        }
 
        /* Get relayd socket from session daemon */
        ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1);
        if (ret != sizeof(fd)) {
-               ret = -1;
                fd = -1;        /* Just in case it gets set with an invalid value. */
 
                /*
@@ -3484,7 +3493,6 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type,
                break;
        default:
                ERR("Unknown relayd socket type (%d)", sock_type);
-               ret = -1;
                ret_code = LTTCOMM_CONSUMERD_FATAL;
                goto error;
        }