From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751944Ab3FZHOh (ORCPT ); Wed, 26 Jun 2013 03:14:37 -0400 Received: from LGEMRELSE6Q.lge.com ([156.147.1.121]:61581 "EHLO LGEMRELSE6Q.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751873Ab3FZHOe (ORCPT ); Wed, 26 Jun 2013 03:14:34 -0400 X-AuditID: 9c930179-b7cafae000004567-9f-51ca94d3465e From: Namhyung Kim To: Arnaldo Carvalho de Melo Cc: Peter Zijlstra , Paul Mackerras , Ingo Molnar , Namhyung Kim , LKML , Steven Rostedt , Frederic Weisbecker , Jiri Olsa , David Ahern , Stephane Eranian Subject: [PATCH 16/19] perf ftrace: Add a signal handler for SIGSEGV Date: Wed, 26 Jun 2013 16:14:19 +0900 Message-Id: <1372230862-15861-17-git-send-email-namhyung@kernel.org> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1372230862-15861-1-git-send-email-namhyung@kernel.org> References: <1372230862-15861-1-git-send-email-namhyung@kernel.org> X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Namhyung Kim It's for debugging purpose. Cc: Steven Rostedt Cc: Frederic Weisbecker Signed-off-by: Namhyung Kim --- tools/perf/builtin-ftrace.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c index 698dd0b5cecf..3b6bcc29715b 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -41,6 +41,13 @@ struct perf_ftrace { static bool done; +static void sig_exit(int sig) +{ + psignal(sig, "perf"); + signal(sig, SIG_DFL); + raise(sig); +} + static void sig_handler(int sig __maybe_unused) { done = true; @@ -228,6 +235,7 @@ static int do_ftrace_live(struct perf_ftrace *ftrace) signal(SIGUSR1, sig_handler); signal(SIGCHLD, sig_handler); signal(SIGPIPE, sig_handler); + signal(SIGSEGV, sig_exit); if (setup_tracing_files(ftrace) < 0) goto out_reset; @@ -599,6 +607,7 @@ static int do_ftrace_record(struct perf_ftrace *ftrace) signal(SIGINT, sig_handler); signal(SIGUSR1, sig_handler); signal(SIGCHLD, sig_handler); + signal(SIGSEGV, sig_exit); if (setup_tracing_files(ftrace) < 0) goto out_reset; @@ -1100,6 +1109,8 @@ static int do_ftrace_show(struct perf_ftrace *ftrace) }, }; + signal(SIGSEGV, sig_exit); + scnprintf(buf, sizeof(buf), "%s.dir/perf.header", ftrace->dirname); session = perf_session__new(buf, O_RDONLY, false, false, &show.tool); @@ -1189,6 +1200,8 @@ static int do_ftrace_report(struct perf_ftrace *ftrace) struct machine *machine; struct dso *dso; + signal(SIGSEGV, sig_exit); + scnprintf(buf, sizeof(buf), "%s.dir/perf.header", ftrace->dirname); session = perf_session__new(buf, O_RDONLY, false, false, &report.tool); -- 1.7.11.7