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perf tools: Fix the code to strip command name

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Recent commit broke command name strip in perf_event__get_comm_ids
function. It replaced left to right search for '\n' with rtrim, which
actually does right to left search. It occasionally caught earlier '\n'
and kept trash in the command name.

Keeping the ltrim, but moving back the left to right '\n' search
instead of the rtrim.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Taeung Song <treeze.taeung@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Yao Jin <yao.jin@linux.intel.com>
Fixes: bdd97ca63f ("perf tools: Refactor the code to strip command name with {l,r}trim()")
Link: http://lkml.kernel.org/r/20170420092430.29657-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2017-04-20 11:24:30 +02:00 committed by Arnaldo Carvalho de Melo
parent fb7b756196
commit 9d43f5e8df
1 changed files with 8 additions and 1 deletions
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9
tools/perf/util/event.c
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@ -141,8 +141,15 @@ static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
ppids = strstr(bf, "PPid:");
if (name) {
char *nl;
name += 5; /* strlen("Name:") */
name = rtrim(ltrim(name));
name = ltrim(name);
nl = strchr(name, '\n');
if (nl)
*nl = '\0';
size = strlen(name);
if (size >= len)
size = len - 1;