linux-kernel - [PATCH 2/2] perf tools: Synthesize data mmap events for threads

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Date:	Sun, 11 Nov 2012 23:20:51 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/2] perf tools: Synthesize data mmap events for threads

Current perf_event__synthesize_mmap_events() only deals with
executable mappings.  With recently added memory access sampling,
non-executable data mappings are needed also.

Cc: Stephane Eranian <eranian@...gle.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/event.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 3cf2c3e0605f..06e4d57a9e29 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -210,11 +210,15 @@ static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 		       &event->mmap.start, &event->mmap.len, prot,
 		       &event->mmap.pgoff, execname);
 
-		if (prot[2] != 'x')
-			continue;
+		if (prot[2] == 'x' && !strcmp(execname, ""))
+			strcpy(execname, anonstr);
 
+		/* ignore non-executable anon mappings */
 		if (!strcmp(execname, ""))
-			strcpy(execname, anonstr);
+			continue;
+
+		if (prot[2] != 'x')
+			event->header.misc |= PERF_RECORD_MISC_MMAP_USER;
 
 		size = strlen(execname) + 1;
 		memcpy(event->mmap.filename, execname, size);
-- 
1.7.9.2

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