Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d11416e7 authored by Jean Pihet's avatar Jean Pihet Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarJean Pihet <jean.pihet@linaro.org>
Acked-by: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 48878053

tools/perf/util/unwind.c

+4 −4
Original line number Diff line number Diff line
@@ -340,8 +340,8 @@ 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);

		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);

	}