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authorNamhyung Kim <namhyung@kernel.org>2015-01-29 11:07:21 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-01-29 22:20:42 +0300
commitf1f13af99a903ae873f5373e965508e0486c1c29 (patch)
tree183674eba3f82637bc6270ac15960cf6e31fa9c2 /tools/perf/util/dso.h
parent459a3df76c99124fd222586be7f10f862547e7a9 (diff)
downloadlinux-f1f13af99a903ae873f5373e965508e0486c1c29.tar.xz
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.h1
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 */