Commit-ID: 6eb08660962a91212902869672dab5199827cbfd
Gitweb: http://git.kernel.org/tip/6eb08660962a91212902869672dab5199827cbfd
Author: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
AuthorDate: Thu, 14 Aug 2014 02:22:30 +0000
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Fri, 15 Aug 2014 10:53:36 -0300
perf probe: Don't use strerror if strlist__add failed
Since the strlist__add doesn't involves any IO, the failure reason must
be ENOMEM or EINVAL, moreover this is just a debug message, we don't
need to show the error string.
And also, if get_probe_trace_command_rawlist() returns NULL, it doesn't
mean the rawlist is empty, there is an error. So caller must use
-ENOMEM for the error.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Naohiro Aota <naota@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/20140814022230.3545.99254.stgit@kbuild-fedora.novalocal
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/probe-event.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index ac15ff7..bf39c23 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -1881,7 +1881,7 @@ static struct strlist *get_probe_trace_command_rawlist(int fd)
p[idx] = '\0';
ret = strlist__add(sl, buf);
if (ret < 0) {
- pr_debug("strlist__add failed: %s\n", strerror(-ret));
+ pr_debug("strlist__add failed (%d)\n", ret);
strlist__delete(sl);
return NULL;
}
@@ -1940,7 +1940,7 @@ static int __show_perf_probe_events(int fd, bool is_kprobe)
rawlist = get_probe_trace_command_rawlist(fd);
if (!rawlist)
- return -ENOENT;
+ return -ENOMEM;
strlist__for_each(ent, rawlist) {
ret = parse_probe_trace_command(ent->s, &tev);
@@ -2007,6 +2007,8 @@ static struct strlist *get_probe_trace_event_names(int fd, bool include_group)
memset(&tev, 0, sizeof(tev));
rawlist = get_probe_trace_command_rawlist(fd);
+ if (!rawlist)
+ return NULL;
sl = strlist__new(true, NULL);
strlist__for_each(ent, rawlist) {
ret = parse_probe_trace_command(ent->s, &tev);
--
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