From ed20973aeaa592c1f61f7f80be07d4485888a09f Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Tue, 7 Aug 2012 23:32:05 -0300
Subject: [PATCH] --- yaml --- r: 323633 b: refs/heads/master c:
 dc4552bf7176573ccf79af04ab8648b015738f4a h: refs/heads/master i:   323631:
 2bc4828bec39f65b89e22e7a518e6ddcb0bb05fe v: v3

---
 [refs]                       |  2 +-
 trunk/tools/perf/util/util.c | 19 +++++++++++++++++++
 trunk/tools/perf/util/util.h |  2 ++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 659694f13f26..d757896cabb4 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a7cb8863dd352f052e7b2b86a17410070d1b69af
+refs/heads/master: dc4552bf7176573ccf79af04ab8648b015738f4a
diff --git a/trunk/tools/perf/util/util.c b/trunk/tools/perf/util/util.c
index d03599fbe78b..1b8775c3707d 100644
--- a/trunk/tools/perf/util/util.c
+++ b/trunk/tools/perf/util/util.c
@@ -1,6 +1,9 @@
 #include "../perf.h"
 #include "util.h"
 #include <sys/mman.h>
+#include <execinfo.h>
+#include <stdio.h>
+#include <stdlib.h>
 
 /*
  * XXX We need to find a better place for these things...
@@ -158,3 +161,19 @@ size_t hex_width(u64 v)
 
 	return n;
 }
+
+/* Obtain a backtrace and print it to stdout. */
+void dump_stack(void)
+{
+	void *array[16];
+	size_t size = backtrace(array, ARRAY_SIZE(array));
+	char **strings = backtrace_symbols(array, size);
+	size_t i;
+
+	printf("Obtained %zd stack frames.\n", size);
+
+	for (i = 0; i < size; i++)
+		printf("%s\n", strings[i]);
+
+	free(strings);
+}
diff --git a/trunk/tools/perf/util/util.h b/trunk/tools/perf/util/util.h
index b13c7331eaf8..00a93a91a235 100644
--- a/trunk/tools/perf/util/util.h
+++ b/trunk/tools/perf/util/util.h
@@ -266,4 +266,6 @@ size_t hex_width(u64 v);
 
 char *rtrim(char *s);
 
+void dump_stack(void);
+
 #endif