perf tools: Use the DWARF unwind info only if loaded (d11416e7) · Commits · 戴 / test

Use the info only if it has been found in the .debug_frame section of the ELF binary. Signed-off-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:

tools/perf/util/unwind.c

+4 −4

Original line number	Original line	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 */		/* Check the .debug_frame section for unwinding info */
	if (!read_unwind_spec_debug_frame(map->dso, ui->machine, &segbase)) {		if (!read_unwind_spec_debug_frame(map->dso, ui->machine, &segbase)) {
	memset(&di, 0, sizeof(di));		memset(&di, 0, sizeof(di));
	dwarf_find_debug_frame(0, &di, ip, 0, map->dso->name,		if (dwarf_find_debug_frame(0, &di, ip, 0, map->dso->name,
	map->start, map->end);		map->start, map->end))
	return dwarf_search_unwind_table(as, ip, &di, pi,		return dwarf_search_unwind_table(as, ip, &di, pi,
	need_unwind_info, arg);		need_unwind_info, arg);
	}		}