linux-kernel - [tip:perf/urgent] perf: Propagate term signal to child

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Date:	Mon, 5 Oct 2009 11:47:22 GMT
From:	tip-bot for Chris Wilson <chris@...is-wilson.co.uk>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	tglx@...utronix.de, chris@...is-wilson.co.uk, mingo@...e.hu
Subject: [tip:perf/urgent] perf: Propagate term signal to child

Commit-ID:  933da83aa17939a78d59708321c0b27d0ec8c6ce
Gitweb:     http://git.kernel.org/tip/933da83aa17939a78d59708321c0b27d0ec8c6ce
Author:     Chris Wilson <chris@...is-wilson.co.uk>
AuthorDate: Sun, 4 Oct 2009 01:35:01 +0100
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Sun, 4 Oct 2009 19:37:39 +0200

perf: Propagate term signal to child

If we launch the child on behalf of the user, ensure that it dies
along with ourselves when we are interrupted.

Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
Cc: Chris Wilson <chris@...is-wilson.co.uk>
LKML-Reference: <1254616502-4728-1-git-send-email-chris@...is-wilson.co.uk>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 tools/perf/builtin-record.c |    6 ++++++
 tools/perf/builtin-stat.c   |    8 +++++++-
 2 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index a5a050a..3eeef33 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -41,6 +41,7 @@ static int			raw_samples			= 0;
 static int			system_wide			= 0;
 static int			profile_cpu			= -1;
 static pid_t			target_pid			= -1;
+static pid_t			child_pid			= -1;
 static int			inherit				= 1;
 static int			force				= 0;
 static int			append_file			= 0;
@@ -184,6 +185,9 @@ static void sig_handler(int sig)
 
 static void sig_atexit(void)
 {
+	if (child_pid != -1)
+		kill(child_pid, SIGTERM);
+
 	if (signr == -1)
 		return;
 
@@ -610,6 +614,8 @@ static int __cmd_record(int argc, const char **argv)
 				exit(-1);
 			}
 		}
+
+		child_pid = pid;
 	}
 
 	if (realtime_prio) {
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index e5f6ece..3db31e7 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -69,7 +69,8 @@ static int			run_idx				=  0;
 static int			run_count			=  1;
 static int			inherit				=  1;
 static int			scale				=  1;
-static int			target_pid			= -1;
+static pid_t			target_pid			= -1;
+static pid_t			child_pid			= -1;
 static int			null_run			=  0;
 
 static int			fd[MAX_NR_CPUS][MAX_COUNTERS];
@@ -285,6 +286,8 @@ static int run_perf_stat(int argc __used, const char **argv)
 		exit(-1);
 	}
 
+	child_pid = pid;
+
 	/*
 	 * Wait for the child to be ready to exec.
 	 */
@@ -433,6 +436,9 @@ static void skip_signal(int signo)
 
 static void sig_atexit(void)
 {
+	if (child_pid != -1)
+		kill(child_pid, SIGTERM);
+
 	if (signr == -1)
 		return;
 
--
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