提交 d11416e7 编写于 作者: J Jean Pihet 提交者: Arnaldo Carvalho de Melo

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: NJean Pihet <jean.pihet@linaro.org>
Acked-by: NJiri 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.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
上级 48878053
...@@ -340,10 +340,10 @@ find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi, ...@@ -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 */ /* 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);
} }
#endif #endif
......
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