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author | 2009-06-10 15:55:59 +0200 | |
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committer | 2009-06-10 16:55:27 +0200 | |
commit | f7b7c26e01e51fe46097e11f179dc71ce7950084 (patch) | |
tree | 4a542e0c386ceebc306886604337dbe6db50c413 /tools/perf/builtin-stat.c | |
parent | perf_counter tools: Small frequency related fixes (diff) | |
download | linux-f7b7c26e01e51fe46097e11f179dc71ce7950084.tar.gz linux-f7b7c26e01e51fe46097e11f179dc71ce7950084.tar.bz2 linux-f7b7c26e01e51fe46097e11f179dc71ce7950084.zip |
perf_counter tools: Propagate signals properly
Currently report and stat catch SIGINT (and others) without altering
their exit state. This means that things like:
while :; do perf stat ./foo ; done
Loops become hard-to-interrupt, because bash never sees perf terminate
due to interruption. Fix this.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/builtin-stat.c')
-rw-r--r-- | tools/perf/builtin-stat.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 80855090fd9f..6404906924fa 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -296,8 +296,20 @@ static int do_perf_stat(int argc, const char **argv) return 0; } +static volatile int signr = -1; + static void skip_signal(int signo) { + signr = signo; +} + +static void sig_atexit(void) +{ + if (signr == -1) + return; + + signal(signr, SIG_DFL); + kill(getpid(), signr); } static const char * const stat_usage[] = { @@ -345,6 +357,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix) * What we want is for Ctrl-C to work in the exec()-ed * task, but being ignored by perf stat itself: */ + atexit(sig_atexit); signal(SIGINT, skip_signal); signal(SIGALRM, skip_signal); signal(SIGABRT, skip_signal); |