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| author | Adrian Hunter <adrian.hunter@intel.com> | 2014-10-23 14:45:23 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-10-29 15:32:48 +0300 |
| commit | f6832e1720f5cc283703cfe9ccbfb46a3fb6f548 (patch) | |
| tree | 16f0d4b4efc87d30035dd4a5340d5536d9452fa2 /tools/perf/util/vdso.h | |
| parent | e477f3f01a89a8fd44031e7f2ba6ffcab037336c (diff) | |
| download | linux-f6832e1720f5cc283703cfe9ccbfb46a3fb6f548.tar.xz | |
perf tools: Add support for 32-bit compatibility VDSOs
'perf record' post-processes the event stream to create a list of
build-ids for object files for which sample events have been recorded.
That results in those object files being recorded in the build-id cache.
In the case of VDSO, perf tools reads it from memory and copies it into
a temporary file, which as decribed above, gets added to the build-id
cache.
Then when the perf.data file is processed by other tools, the build-id
of VDSO is listed in the perf.data file and the VDSO can be read from
the build-id cache. In that case the name of the map, the short name of
the DSO, and the entry in the build-id cache are all "[vdso]".
However, in the 64-bit case, there also can be 32-bit compatibility
VDSOs.
A previous patch added programs "perf-read-vdso32" and "perf
read-vdsox32".
This patch uses those programs to read the correct VDSO for a thread and
create a temporary file just as for the 64-bit VDSO.
The map name and the entry in the build-id cache are still "[vdso]" but
the DSO short name becomes "[vdso32]" and "[vdsox32]" respectively.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1414061124-26830-16-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/vdso.h')
| -rw-r--r-- | tools/perf/util/vdso.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/vdso.h b/tools/perf/util/vdso.h index af9d6929a215..d97da1616f0c 100644 --- a/tools/perf/util/vdso.h +++ b/tools/perf/util/vdso.h @@ -7,7 +7,9 @@ #define VDSO__MAP_NAME "[vdso]" -#define DSO__NAME_VDSO "[vdso]" +#define DSO__NAME_VDSO "[vdso]" +#define DSO__NAME_VDSO32 "[vdso32]" +#define DSO__NAME_VDSOX32 "[vdsox32]" static inline bool is_vdso_map(const char *filename) { |