linux-kernel - [PATCH v2 16/16] perf tools: detect data vs. text mappings

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Message-Id: <1352123463-7346-17-git-send-email-eranian@google.com>
Date:	Mon,  5 Nov 2012 14:51:03 +0100
From:	Stephane Eranian <eranian@...gle.com>
To:	linux-kernel@...r.kernel.org
Cc:	peterz@...radead.org, mingo@...e.hu, ak@...ux.intel.com,
	acme@...hat.com, jolsa@...hat.com, namhyung.kim@....com
Subject: [PATCH v2 16/16] perf tools: detect data vs. text mappings

Leverages the PERF_RECORD_MISC_MMAP_DATA bit in
the RECORD_MMAP record header. When the bit is set
then the mapping type is set to MAP__VARIABLE.

Signed-off-by: Stephane Eranian <eranian@...gle.com>
---
 tools/perf/util/machine.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 502eec0..1a88b9c 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -192,6 +192,7 @@ int machine__process_mmap_event(struct machine *machine, union perf_event *event
 	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 	struct thread *thread;
 	struct map *map;
+	enum map_type type;
 	int ret = 0;
 
 	if (dump_trace)
@@ -208,10 +209,17 @@ int machine__process_mmap_event(struct machine *machine, union perf_event *event
 	thread = machine__findnew_thread(machine, event->mmap.pid);
 	if (thread == NULL)
 		goto out_problem;
+
+	if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
+		type = MAP__VARIABLE;
+	else 
+		type = MAP__FUNCTION;
+
 	map = map__new(&machine->user_dsos, event->mmap.start,
 			event->mmap.len, event->mmap.pgoff,
 			event->mmap.pid, event->mmap.filename,
-			MAP__FUNCTION);
+			type);
+
 	if (map == NULL)
 		goto out_problem;
 
-- 
1.7.9.5

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