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authorWang Nan <wangnan0@huawei.com>2015-08-26 10:57:44 +0000
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-08-26 10:40:34 -0300
commit6c6e024f0a62a6a08c06002fd3caa2307cc54fd0 (patch)
tree670c5540652aa322d53988ab6ba29a6129d86937 /tools/perf
parentbe07afe92a09638db9159d2c0794487d66a437a2 (diff)
downloadop-kernel-dev-6c6e024f0a62a6a08c06002fd3caa2307cc54fd0.zip
op-kernel-dev-6c6e024f0a62a6a08c06002fd3caa2307cc54fd0.tar.gz
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/perf')
-rw-r--r--tools/perf/util/probe-event.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 926bcec..eaacb58 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;
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