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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 /arch/arm/mach-footbridge | |
| parent | 459a3df76c99124fd222586be7f10f862547e7a9 (diff) | |
| download | blackbird-op-linux-f1f13af99a903ae873f5373e965508e0486c1c29.tar.gz blackbird-op-linux-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 'arch/arm/mach-footbridge')
0 files changed, 0 insertions, 0 deletions
