[rtla 09/13] rtla: Exit if trace output action fails

[Wander Lairson Costa]

The actions_add_trace_output() function can fail if it's unable to
allocate memory for a new action. Currently, the return value is not
checked, and the program continues to run, which can lead to
unexpected behavior.

Add a check to the return value of actions_add_trace_output() and
exit with a proper error message if it fails.

Signed-off-by: Wander Lairson Costa <wan...@redhat.com>
---
 tools/tracing/rtla/src/timerlat_hist.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/tracing/rtla/src/timerlat_hist.c 
b/tools/tracing/rtla/src/timerlat_hist.c
index f14fc56c5b4a5..39a14c4e07de8 100644
--- a/tools/tracing/rtla/src/timerlat_hist.c
+++ b/tools/tracing/rtla/src/timerlat_hist.c
@@ -1070,8 +1070,10 @@ static struct common_params
                }
        }
 
-       if (trace_output)
-               actions_add_trace_output(&params->common.threshold_actions, 
trace_output);
+       if (trace_output && 
actions_add_trace_output(&params->common.threshold_actions, trace_output)) {
+               err_msg("Could not add a new trace output");
+               exit(EXIT_FAILURE);
+       }
 
        if (geteuid()) {
                err_msg("rtla needs root permission\n");
-- 
2.51.1