| From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 30/38] perf tools: Use the DWARF unwind info only if loaded | Date | Mon, 13 Jan 2014 17:47:31 -0300 |
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From: Jean Pihet <jean.pihet@linaro.org>
Use the info only if it has been found in the .debug_frame section of the ELF binary.
Signed-off-by: Jean Pihet <jean.pihet@linaro.org> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Will Deacon <will.deacon@arm.com> Cc: linaro-kernel@lists.linaro.org Cc: patches@linaro.org Link: http://lkml.kernel.org/r/1387212194-8028-1-git-send-email-jean.pihet@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/unwind.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/tools/perf/util/unwind.c b/tools/perf/util/unwind.c index 0efd5393de85..416f22bf3693 100644 --- a/tools/perf/util/unwind.c +++ b/tools/perf/util/unwind.c @@ -340,10 +340,10 @@ find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi, /* Check the .debug_frame section for unwinding info */ if (!read_unwind_spec_debug_frame(map->dso, ui->machine, &segbase)) { memset(&di, 0, sizeof(di)); - dwarf_find_debug_frame(0, &di, ip, 0, map->dso->name, - map->start, map->end); - return dwarf_search_unwind_table(as, ip, &di, pi, - need_unwind_info, arg); + if (dwarf_find_debug_frame(0, &di, ip, 0, map->dso->name, + map->start, map->end)) + return dwarf_search_unwind_table(as, ip, &di, pi, + need_unwind_info, arg); } #endif -- 1.8.1.4
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