Commit 5c0cf224 authored Jan 07, 2016 by Jiri Olsa Committed by Arnaldo Carvalho de Melo Jan 08, 2016

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>

parent 0ba98149

tools/perf/builtin-record.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -815,8 +815,12 @@ int record_parse_callchain_opt(const struct option *opt,
		}

		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();
		}

		return ret;
		}