linux-kernel - [PATCH 06/13] perf record: Store data mmaps for dwarf unwind

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Date:	Thu,  7 Jan 2016 10:14:03 +0100
From:	Jiri Olsa <jolsa@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Noel Grandin <noelgrandin@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: [PATCH 06/13] 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@...il.com>
Link: http://lkml.kernel.org/n/tip-lh02yir6qfycn8zr892rmlgg@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/builtin-record.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 9c5cdc2c4471..920b93edb497 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -804,6 +804,7 @@ int record_parse_callchain_opt(const struct option *opt,
 	int ret;
 	struct record_opts *record = (struct record_opts *)opt->value;
 
+	record->sample_address = true;
 	record->callgraph_set = true;
 	callchain_param.enabled = !unset;
 
-- 
2.4.3

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