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: NMartin Vuille <jpmv27@aim.com> Reviewed-by: NKim Phillips <kim.phillips@arm.com> Link: http://lkml.kernel.org/r/20180318175053.4222-1-jpmv27@aim.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Showing
想要评论请 注册 或 登录