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| author | Jiri Olsa <jolsa@kernel.org> | 2016-01-07 10:14:01 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-01-08 14:16:34 -0300 |
| commit | 0ddf5246f70ecc04e1bb4c4dc2be65977d1c03a7 (patch) | |
| tree | 1b11f0001dbcadbb977fc06eb6223d38536c7fe9 /tools | |
| parent | f22ed827a8d5ff5a85e7c8e865baaaaf71a8d0cc (diff) | |
| download | lwn-0ddf5246f70ecc04e1bb4c4dc2be65977d1c03a7.tar.gz lwn-0ddf5246f70ecc04e1bb4c4dc2be65977d1c03a7.zip | |
perf unwind: Check for mmaps also in MAP__VARIABLE tree
We've seen cases (softice) where DWARF unwinder went through non
executable mmaps, which we need to lookup in MAP__VARIABLE tree.
Reported-and-Tested-by: Noel Grandin <noelgrandin@gmail.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1452158050-28061-5-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/unwind-libunwind.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c index f37859c04317..ee7e372297e5 100644 --- a/tools/perf/util/unwind-libunwind.c +++ b/tools/perf/util/unwind-libunwind.c @@ -319,6 +319,15 @@ static struct map *find_map(unw_word_t ip, struct unwind_info *ui) thread__find_addr_map(ui->thread, PERF_RECORD_MISC_USER, MAP__FUNCTION, ip, &al); + if (!al.map) { + /* + * We've seen cases (softice) where DWARF unwinder went + * through non executable mmaps, which we need to lookup + * in MAP__VARIABLE tree. + */ + thread__find_addr_map(ui->thread, PERF_RECORD_MISC_USER, + MAP__VARIABLE, ip, &al); + } return al.map; } |