Commit-ID: dc4552bf7176573ccf79af04ab8648b015738f4a
Gitweb: http://git.kernel.org/tip/dc4552bf7176573ccf79af04ab8648b015738f4a
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Tue, 7 Aug 2012 23:32:05 -0300
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 7 Aug 2012 23:32:05 -0300
perf tools: Add dump_stack function
To help in debugging the tools, provides functionality roughly similar
to the function with the same name in the kernel.
Copied from glibc backtrace function man page.
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-6nw2sak21bqy8h1m2syyo816@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/util.c | 19 +++++++++++++++++++
tools/perf/util/util.h | 2 ++
2 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index d03599f..1b8775c 100644
--- a/tools/perf/util/util.c
+++ b/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/tools/perf/util/util.h b/tools/perf/util/util.h
index b13c733..00a93a9 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -266,4 +266,6 @@ size_t hex_width(u64 v);
char *rtrim(char *s);
+void dump_stack(void);
+
#endif
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