diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-08-07 23:32:05 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-08-07 23:32:05 -0300 |
| commit | dc4552bf7176573ccf79af04ab8648b015738f4a (patch) | |
| tree | 6bad99fd2b37a112c0dbe9aa71d1577e316eae4d /tools/perf | |
| parent | a7cb8863dd352f052e7b2b86a17410070d1b69af (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')
| -rw-r--r-- | tools/perf/util/util.c | 19 | ||||
| -rw-r--r-- | 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 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); +} diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index b13c7331eaf..00a93a91a23 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 |