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Subject[tip:perf/urgent] perf: Propagate term signal to child
Commit-ID:  933da83aa17939a78d59708321c0b27d0ec8c6ce
Gitweb: http://git.kernel.org/tip/933da83aa17939a78d59708321c0b27d0ec8c6ce
Author: Chris Wilson <chris@chris-wilson.co.uk>
AuthorDate: Sun, 4 Oct 2009 01:35:01 +0100
Committer: Ingo Molnar <mingo@elte.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@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
LKML-Reference: <1254616502-4728-1-git-send-email-chris@chris-wilson.co.uk>
Signed-off-by: Ingo Molnar <mingo@elte.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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