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>

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index dec8ced61fb00c2bc7114346db3edaf0f7dd89b7..f01fa6f736ef849438ae408445e07201042a983f 100644 (file)
--- 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;