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author | Wang Nan <wangnan0@huawei.com> | 2015-08-26 10:57:42 +0000 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-08-26 10:36:04 -0300 |
commit | 614e2fdbd79b47ddf63a1ccd3f2343e98c3077fb (patch) | |
tree | f601dce7cfbaf4bfe90ab992bb5e68342168c0d9 /tools/perf/util | |
parent | 0bdede8a3e4ff7710622a2e6713d04b3243c24a8 (diff) | |
download | linux-614e2fdbd79b47ddf63a1ccd3f2343e98c3077fb.tar.gz |
perf probe: Fix list result when symbol can't be found
'perf probe -l' reports error if it is unable find symbol through address. Here is an example. # echo 'p:probe_libc/abs_5 /lib64/libc.so.6:0x5' > /sys/kernel/debug/tracing/uprobe_events # cat /sys/kernel/debug/tracing/uprobe_events p:probe_libc/abs_5 /lib64/libc.so.6:0x0000000000000005 # perf probe -l Error: Failed to show event list Also, this situation triggers a logical inconsistency in convert_to_perf_probe_point() that, it returns ENOMEM but actually it never try strdup(). This patch removes !tp->module && !is_kprobe condition, so it always uses address to build function name if symbol not found. Test result: # perf probe -l probe_libc:abs_5 (on 0x5 in /lib64/libc.so.6) 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/1440586666-235233-4-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
-rw-r--r-- | tools/perf/util/probe-event.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 6c7e538c9b8b..f7bacbb98865 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -1866,7 +1866,7 @@ static int convert_to_perf_probe_point(struct probe_trace_point *tp, if (tp->symbol) { pp->function = strdup(tp->symbol); pp->offset = tp->offset; - } else if (!tp->module && !is_kprobe) { + } else { ret = e_snprintf(buf, 128, "0x%" PRIx64, (u64)tp->address); if (ret < 0) return ret; |