Commit-ID: 555fc3b1ef4c850c635be333024dcf67bc1e7cb8 Gitweb: https://git.kernel.org/tip/555fc3b1ef4c850c635be333024dcf67bc1e7cb8 Author: Martin Vuille <jpm...@aim.com> AuthorDate: Sun, 18 Mar 2018 13:50:53 -0400 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Tue, 20 Mar 2018 13:16:09 -0300
perf unwind: Report error from dwfl_attach_state 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 <jpm...@aim.com> Reviewed-by: Kim Phillips <kim.phill...@arm.com> Link: http://lkml.kernel.org/r/20180318175053.4222-1-jpm...@aim.com Signed-off-by: Arnaldo Carvalho de Melo <a...@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);
