perf trace: Validate target task/user/cpu argument

Those target options are mutually exclusive so check it before setting
up target thread/cpu maps.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1349413336-26936-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index dec8ced61fb..f01fa6f736e 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -323,14 +323,21 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
         OPT_END()
         };
         int err;
+        char bf[BUFSIZ];
 
         argc = parse_options(argc, argv, trace_options, trace_usage, 0);
         if (argc)
                 usage_with_options(trace_usage, trace_options);
 
+        err = perf_target__validate(&trace.opts.target);
+        if (err) {
+                perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
+                printf("%s", bf);
+                return err;
+        }
+
         err = perf_target__parse_uid(&trace.opts.target);
         if (err) {
-                char bf[BUFSIZ];
                 perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
                 printf("%s", bf);
                 return err;