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| author |   Namhyung Kim <namhyung@kernel.org> | 2015-01-29 17:07:21 +0900 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-01-29 16:20:42 -0300 |
| commit | f1f13af99a903ae873f5373e965508e0486c1c29 (patch) | |
| tree | 183674eba3f82637bc6270ac15960cf6e31fa9c2 /tools/perf/util/dso.h | |
| parent | perf tools: Provide stub for missing pthread_attr_setaffinity_np (diff) | |
| download | linux-dev-f1f13af99a903ae873f5373e965508e0486c1c29.tar.xz linux-dev-f1f13af99a903ae873f5373e965508e0486c1c29.zip | |
perf callchain: Cache eh/debug frame offset for dwarf unwind
When libunwind tries to resolve callchains it needs to know the offset
of .eh_frame_hdr or .debug_frame to access the dso.
Since it will always return the same result for a given DSO, just cache
the result as an optimization.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1422518843-25818-41-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/dso.h')
| -rw-r--r-- | tools/perf/util/dso.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h index 3782c82c6e44..ced92841ff97 100644 --- a/tools/perf/util/dso.h +++ b/tools/perf/util/dso.h @@ -139,6 +139,7 @@ struct dso { u32 status_seen; size_t file_size; struct list_head open_entry; + u64 frame_offset; } data; union { /* Tool specific area */ |