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authorArnaldo Carvalho de Melo <acme@redhat.com>2012-08-07 23:32:05 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-08-07 23:32:05 -0300
commitdc4552bf7176573ccf79af04ab8648b015738f4a (patch)
tree6bad99fd2b37a112c0dbe9aa71d1577e316eae4d /tools/perf/util/util.c
parenta7cb8863dd352f052e7b2b86a17410070d1b69af (diff)
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@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-6nw2sak21bqy8h1m2syyo816@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/util.c')
-rw-r--r--tools/perf/util/util.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index d03599fbe78..1b8775c3707 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);
+}