perf evlist: Add want_signal parameter to perf_evlist__prepare_workload()

In case a caller doesn't want to receive SIGUSR1 when the child failed
to exec().

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1362987798-24969-6-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 6 insertions, 3 deletions

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 9a337f091b22..5b012b8d7a14 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -746,7 +746,8 @@ out_err:
 
 int perf_evlist__prepare_workload(struct perf_evlist *evlist,
                                   struct perf_target *target,
-                                  const char *argv[], bool pipe_output)
+                                  const char *argv[], bool pipe_output,
+                                  bool want_signal)
 {
         int child_ready_pipe[2], go_pipe[2];
         char bf;
@@ -796,7 +797,8 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist,
                 execvp(argv[0], (char **)argv);
 
                 perror(argv[0]);
-                kill(getppid(), SIGUSR1);
+                if (want_signal)
+                        kill(getppid(), SIGUSR1);
                 exit(-1);
         }
 
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 276a5acc56e6..c096da7d6d58 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -87,7 +87,8 @@ void perf_evlist__config(struct perf_evlist *evlist,
 
 int perf_evlist__prepare_workload(struct perf_evlist *evlist,
                                   struct perf_target *target,
-                                  const char *argv[], bool pipe_output);
+                                  const char *argv[], bool pipe_output,
+                                  bool want_signal);
 int perf_evlist__start_workload(struct perf_evlist *evlist);
 
 int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,