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perf util: Add more debug message on failure path

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It's helpful for debugging on tracing features.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jeremy Eder <jeder@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>,
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/n/tip-rjysr9ljiesymgk4qblteaty@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2013-04-18 21:24:16 +09:00
committed by Arnaldo Carvalho de Melo
parent cd4ceb6343
commit a7619aef6d
2 changed files with 43 additions and 22 deletions
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4
tools/perf/util/header.c
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@ -2803,8 +2803,10 @@ static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
}
event = pevent_find_event(pevent, evsel->attr.config);
if (event == NULL)
if (event == NULL) {
pr_debug("cannot find event format for %d\n", (int)evsel->attr.config);
return -1;
}
if (!evsel->name) {
snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);