| From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 01/44] perf unwind: Report error from dwfl_attach_state | Date | Sat, 24 Mar 2018 17:01:28 -0300 |
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From: Martin Vuille <jpmv27@aim.com>
In verbose level 2, errors returned by libdw are reported in most cases, but not when calling dwfl_attach_state.
Since elfutils v 0.160 (2014), dwfl_attach_state sets the error code to report failure cause. On failure, log the reported error.
Signed-off-by: Martin Vuille <jpmv27@aim.com> Reviewed-by: Kim Phillips <kim.phillips@arm.com> Link: http://lkml.kernel.org/r/20180318175053.4222-1-jpmv27@aim.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/unwind-libdw.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c index 8e969f28cc59..7bdd239c795c 100644 --- a/tools/perf/util/unwind-libdw.c +++ b/tools/perf/util/unwind-libdw.c @@ -236,7 +236,8 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg, if (err) goto out; - if (!dwfl_attach_state(ui->dwfl, EM_NONE, thread->tid, &callbacks, ui)) + err = !dwfl_attach_state(ui->dwfl, EM_NONE, thread->tid, &callbacks, ui); + if (err) goto out; err = dwfl_getthread_frames(ui->dwfl, thread->tid, frame_callback, ui); -- 2.14.3
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