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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-06-10 15:55:59 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-10 16:55:27 +0200 |
| commit | f7b7c26e01e51fe46097e11f179dc71ce7950084 (patch) | |
| tree | 4a542e0c386ceebc306886604337dbe6db50c413 /tools | |
| parent | 4502d77c1d8f15f20c04b92cb96c12d4e465de29 (diff) | |
| download | kernel_samsung_crespo-f7b7c26e01e51fe46097e11f179dc71ce7950084.zip kernel_samsung_crespo-f7b7c26e01e51fe46097e11f179dc71ce7950084.tar.gz kernel_samsung_crespo-f7b7c26e01e51fe46097e11f179dc71ce7950084.tar.bz2 | |
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')
| -rw-r--r-- | tools/perf/builtin-record.c | 12 | ||||
| -rw-r--r-- | tools/perf/builtin-stat.c | 13 |
2 files changed, 25 insertions, 0 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index a5698ad..c10553c 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -169,10 +169,21 @@ static void mmap_read(struct mmap_data *md) } static volatile int done = 0; +static volatile int signr = -1; static void sig_handler(int sig) { done = 1; + signr = sig; +} + +static void sig_atexit(void) +{ + if (signr == -1) + return; + + signal(signr, SIG_DFL); + kill(getpid(), signr); } static void pid_synthesize_comm_event(pid_t pid, int full) @@ -459,6 +470,7 @@ static int __cmd_record(int argc, const char **argv) } else for (i = 0; i < nr_cpus; i++) open_counters(i, target_pid); + atexit(sig_atexit); signal(SIGCHLD, sig_handler); signal(SIGINT, sig_handler); diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 8085509..6404906 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); |