[PATCH 2/5] perf trace: Validate target task/user/cpu argument

[Namhyung Kim <namhyung@kernel.org>]

From: Namhyung Kim <namhyung.kim@lge.com>

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

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/builtin-trace.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 9fc4bed8837d..7bb7e757c745 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -324,14 +324,21 @@ 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;
-- 
1.7.11.4