From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Fri, 11 Dec 2015 19:43:57 +0000 (-0300)
Subject: perf tools: Use same signal handling strategy as 'record'
X-Git-Tag: v4.5-rc1~171^2~19^2~25
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=9daddf66a37708ec7182a7058f159166d12c9812;p=linux.git

perf tools: Use same signal handling strategy as 'record'

I.e. don't exit with the signal number, instead set the signal handler
to the default one and then raise it again.

Noticed while trying to dump the stack at segfaults in the 'perf test'
forked process used to run each test, that inspects signal info at
each test.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-5x5r176wnoqxi5p6id05wv9w@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---

diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 07da970a62a3..aff0cfd83662 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -352,7 +352,8 @@ void sighandler_dump_stack(int sig)
 {
 	psignal(sig, "perf");
 	dump_stack();
-	exit(sig);
+	signal(sig, SIG_DFL);
+	raise(sig);
 }
 
 int parse_nsec_time(const char *str, u64 *ptime)