Fix: tests: interrupting get_next_notification causes test to fail

[lttng-tools.git] / tests / regression / tools / notification / notification.c

diff --git a/tests/regression/tools/notification/notification.c b/tests/regression/tools/notification/notification.c
index 19df9bc3049f47681b4c8f494d56e5da9bdcf0f0..364d41895bb78531f61b20a1842bfe4a02960680 100644 (file)
--- a/tests/regression/tools/notification/notification.c
+++ b/tests/regression/tools/notification/notification.c
@@ -59,19 +59,35 @@ void wait_on_file(const char *path, bool file_exist)
                ret = stat(path, &buf);
                if (ret == -1 && errno == ENOENT) {
                        if (file_exist) {
-                               (void) poll(NULL, 0, 10);       /* 10 ms delay */
-                               continue;                       /* retry */
+                               /*
+                                * The file does not exist. wait a bit and
+                                * continue looping until it does.
+                                */
+                               (void) poll(NULL, 0, 10);
+                               continue;
                        }
-                       break; /* File does not exist */
+
+                       /*
+                        * File does not exist and the exit condition we want.
+                        * Break from the loop and return.
+                        */
+                       break;
                }
                if (ret) {
                        perror("stat");
                        exit(EXIT_FAILURE);
                }
-               break;  /* found */
+               /*
+                * stat() returned 0, so the file exists. break now only if
+                * that's the exit condition we want.
+                */
+               if (file_exist) {
+                       break;
+               }
        }
 }
 
+static
 int write_pipe(const char *path, uint8_t data)
 {
        int ret = 0;
@@ -103,6 +119,7 @@ end:
        return ret;
 }
 
+static
 int stop_consumer(const char **argv)
 {
        int ret = 0, i;
@@ -113,6 +130,7 @@ int stop_consumer(const char **argv)
        return ret;
 }
 
+static
 int resume_consumer(const char **argv)
 {
        int ret = 0, i;
@@ -123,7 +141,8 @@ int resume_consumer(const char **argv)
        return ret;
 }
 
-int suspend_application()
+static
+int suspend_application(void)
 {
        int ret;
        struct stat buf;
@@ -151,6 +170,7 @@ error:
 
 }
 
+static
 int resume_application()
 {
        int ret;
@@ -181,6 +201,7 @@ error:
 }
 
 
+static
 void test_triggers_buffer_usage_condition(const char *session_name,
                const char *channel_name,
                enum lttng_domain_type domain_type,
@@ -300,7 +321,7 @@ void test_triggers_buffer_usage_condition(const char *session_name,
                        assert("Logic error for test vector generation");
                }
 
-               loop_ret = asprintf(&test_tuple_string, "session name %s, channel name  %s, threshold ratio %s, threshold byte %s, domain type %s",
+               loop_ret = asprintf(&test_tuple_string, "session name %s, channel name %s, threshold ratio %s, threshold byte %s, domain type %s",
                                session_name_set ? "set" : "unset",
                                channel_name_set ? "set" : "unset",
                                threshold_ratio_set ? "set" : "unset",
@@ -374,6 +395,7 @@ void wait_data_pending(const char *session_name)
        } while (ret != 0);
 }
 
+static
 void test_notification_channel(const char *session_name, const char *channel_name, const enum lttng_domain_type domain_type, const char **argv)
 {
        int ret = 0;
@@ -579,7 +601,9 @@ void test_notification_channel(const char *session_name, const char *channel_nam
        lttng_start_tracing(session_name);
 
        /* Wait for high notification */
-       nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
+       do {
+               nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
+       } while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
        ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK
                        && notification
                        && lttng_condition_get_type(lttng_notification_get_condition(notification)) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH,
@@ -603,7 +627,9 @@ void test_notification_channel(const char *session_name, const char *channel_nam
        nc_status = lttng_notification_channel_subscribe(notification_channel, low_condition);
        ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK, "subscribe with pending notification");
 
-       nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
+       do {
+               nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
+       } while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
        ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK
                        && notification
                        && lttng_condition_get_type(lttng_notification_get_condition(notification)) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW,
@@ -616,7 +642,9 @@ void test_notification_channel(const char *session_name, const char *channel_nam
        resume_application();
        lttng_start_tracing(session_name);
 
-       nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
+       do {
+               nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
+       } while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
        ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK && notification &&
                        lttng_condition_get_type(lttng_notification_get_condition(notification)) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH,
                        "High notification received after intermediary communication");
@@ -628,7 +656,9 @@ void test_notification_channel(const char *session_name, const char *channel_nam
        resume_consumer(argv);
        wait_data_pending(session_name);
 
-       nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
+       do {
+               nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
+       } while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
        ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK && notification &&
                        lttng_condition_get_type(lttng_notification_get_condition(notification)) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW,
                        "Low notification received after re-subscription");
@@ -640,7 +670,9 @@ void test_notification_channel(const char *session_name, const char *channel_nam
        /* Stop consumer to force a high notification */
        lttng_start_tracing(session_name);
 
-       nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
+       do {
+               nc_status = lttng_notification_channel_get_next_notification(notification_channel, &notification);
+       } while (nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_INTERRUPTED);
        ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK && notification &&
                        lttng_condition_get_type(lttng_notification_get_condition(notification)) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH,
                        "High notification");