linux-kernel - [patch 2/5] perf_counter: Synthesize VDSO mmap event

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Message-Id: <20090716104817.517264409@samba.org>
Date:	Thu, 16 Jul 2009 20:42:49 +1000
From:	Anton Blanchard <anton@...ba.org>
To:	a.p.zijlstra@...llo.nl, mingo@...e.hu, paulus@...ba.org,
	fweisbec@...il.com
Cc:	linux-kernel@...r.kernel.org
Subject: [patch 2/5] perf_counter: Synthesize VDSO mmap event

perf record synthesizes mmap events for the running process. Right now
it just catches file mappings, but we can check for the vdso symbol
and add that too.

Signed-off-by: Anton Blanchard <anton@...ba.org>
---

Only tested on PowerPC, but I assume x86 has the same issue.

Index: linux.trees.git/tools/perf/builtin-record.c
===================================================================
--- linux.trees.git.orig/tools/perf/builtin-record.c	2009-07-13 12:33:49.000000000 +1000
+++ linux.trees.git/tools/perf/builtin-record.c	2009-07-13 13:25:00.000000000 +1000
@@ -313,6 +313,10 @@
 		if (*pbf == 'x') { /* vm_exec */
 			char *execname = strchr(bf, '/');
 
+			/* Catch VDSO */
+			if (execname == NULL)
+				execname = strstr(bf, "[vdso]");
+
 			if (execname == NULL)
 				continue;
 

-- 

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