diff options
| author | Wang Nan <wangnan0@huawei.com> | 2015-08-26 13:57:44 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-08-26 16:40:34 +0300 |
| commit | 6c6e024f0a62a6a08c06002fd3caa2307cc54fd0 (patch) | |
| tree | 670c5540652aa322d53988ab6ba29a6129d86937 /tools | |
| parent | be07afe92a09638db9159d2c0794487d66a437a2 (diff) | |
| download | linux-6c6e024f0a62a6a08c06002fd3caa2307cc54fd0.tar.xz | |
perf probe: Fix error reported when offset without function
This patch fixes a bug that, when offset is provided but function is
lost, parse_perf_probe_point() will give a "" string as function name,
so the checking code at the end of parse_perf_probe_point() become
useless. For example:
# perf probe +0x1234
Failed to find symbol in kernel
Error: Failed to add events.
After this patch:
# perf probe +0x1234
Semantic error :Offset requires an entry function.
Error: Command Parse Error.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1440586666-235233-6-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/probe-event.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 926bcecc4a44..eaacb58b9b36 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -1194,9 +1194,13 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) *ptr++ = '\0'; } - tmp = strdup(arg); - if (tmp == NULL) - return -ENOMEM; + if (arg[0] == '\0') + tmp = NULL; + else { + tmp = strdup(arg); + if (tmp == NULL) + return -ENOMEM; + } if (file_spec) pp->file = tmp; |