Commit-ID: d11416e76b3e2f60ed6cfa7c532d3b6777f66527
Gitweb: http://git.kernel.org/tip/d11416e76b3e2f60ed6cfa7c532d3b6777f66527
Author: Jean Pihet <jean.pihet@xxxxxxxxxx>
AuthorDate: Mon, 16 Dec 2013 17:43:14 +0100
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 13 Jan 2014 10:06:26 -0300
perf tools: Use the DWARF unwind info only if loaded
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@xxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: linaro-kernel@xxxxxxxxxxxxxxxx
Cc: patches@xxxxxxxxxx
Link: http://lkml.kernel.org/r/1387212194-8028-1-git-send-email-jean.pihet@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
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 0efd539..416f22b 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
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