linux-kernel - [tip:perf/core] perf machine: Detect data vs. text mappings

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Message-ID: <tip-bad4091791b0bb8c2d7919ddefe2f0d109299b5a@git.kernel.org>
Date:	Tue, 2 Apr 2013 02:57:05 -0700
From:	tip-bot for Stephane Eranian <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, eranian@...gle.com,
	hpa@...or.com, mingo@...nel.org, peterz@...radead.org,
	namhyung.kim@....com, jolsa@...hat.com, ak@...ux.intel.com,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perf/core] perf machine: Detect data vs. text mappings

Commit-ID:  bad4091791b0bb8c2d7919ddefe2f0d109299b5a
Gitweb:     http://git.kernel.org/tip/bad4091791b0bb8c2d7919ddefe2f0d109299b5a
Author:     Stephane Eranian <eranian@...gle.com>
AuthorDate: Thu, 24 Jan 2013 16:10:40 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 1 Apr 2013 12:22:00 -0300

perf machine: 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>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung.kim@....com>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/1359040242-8269-17-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.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 d77ba86..b2ecad6 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -955,6 +955,7 @@ 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)
@@ -971,10 +972,17 @@ 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;
 
--
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