Please note that a similar patch has been applied by Arnaldo Carvalho de Melo:

 http://lkml.kernel.org/r/[email protected]

On 2015/6/3 20:30, Namhyung Kim wrote:
Hi Wang,

On Wed, Jun 3, 2015 at 5:50 PM, Wang Nan <[email protected]> wrote:
Commit 4bb11d012ab248d0e383008d725be0d26a74fac2 ("perf tools: Add
dso__data_get/put_fd()") has a problem: it uses a undefined variable
'dso' in find_proc_info(), which should be 'map->dso'. The buggy code
piece is not compiled if NO_LIBUNWIND_DEBUG_FRAME is not set.

Signed-off-by: Wang Nan <[email protected]>
Acked-by: Namhyung Kim <[email protected]>

Thanks for fixing this!
Namhyung


---
  tools/perf/util/unwind-libunwind.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/unwind-libunwind.c 
b/tools/perf/util/unwind-libunwind.c
index f079b63..4c00507 100644
--- a/tools/perf/util/unwind-libunwind.c
+++ b/tools/perf/util/unwind-libunwind.c
@@ -360,7 +360,7 @@ find_proc_info(unw_addr_space_t as, unw_word_t ip, 
unw_proc_info_t *pi,
                 unw_word_t base = is_exec ? 0 : map->start;

                 if (fd >= 0)
-                       dso__data_put_fd(dso);
+                       dso__data_put_fd(map->dso);

                 memset(&di, 0, sizeof(di));
                 if (dwarf_find_debug_frame(0, &di, ip, base, map->dso->name,
--
1.8.3.4





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