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perf record: Store data mmaps for dwarf unwind 

Currently we don't synthesize data mmap by default. It depends on -d
option, that enables data address sampling.

But we've seen cases (softice) where DWARF unwinder went through non
executable mmaps, which we need to lookup in MAP__VARIABLE tree.

Making data mmaps to be synthesized for dwarf unwind as well.

Reported-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/20160107133022.GA32115@krava.brq.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2016-01-07 14:30:22 +01:00 committed by Arnaldo Carvalho de Melo
parent 0ba98149f8
commit 5c0cf22477
1 changed files with 5 additions and 1 deletions
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6
tools/perf/builtin-record.c
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@ -815,8 +815,12 @@ int record_parse_callchain_opt(const struct option *opt,
} }
ret = parse_callchain_record_opt(arg, &callchain_param); ret = parse_callchain_record_opt(arg, &callchain_param);
if (!ret) if (!ret) {
/* Enable data address sampling for DWARF unwind. */
if (callchain_param.record_mode == CALLCHAIN_DWARF)
record->sample_address = true;
callchain_debug(); callchain_debug();
}
return ret; return ret;
} }