perf tests: Fix a memory leak of cpu_map object in the openat_syscall…

…_event_on_all_cpus test

[ Upstream commit 93faa52 ]

  =================================================================
  ==7497==ERROR: LeakSanitizer: detected memory leaks

  Direct leak of 40 byte(s) in 1 object(s) allocated from:
      #0 0x7f0333a88f30 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.5+0xedf30)
      Freescale#1 0x5625e5326213 in cpu_map__trim_new util/cpumap.c:45
      Freescale#2 0x5625e5326703 in cpu_map__read util/cpumap.c:103
      Freescale#3 0x5625e53267ef in cpu_map__read_all_cpu_map util/cpumap.c:120
      Freescale#4 0x5625e5326915 in cpu_map__new util/cpumap.c:135
      Freescale#5 0x5625e517b355 in test__openat_syscall_event_on_all_cpus tests/openat-syscall-all-cpus.c:36
      Freescale#6 0x5625e51528e6 in run_test tests/builtin-test.c:358
      Freescale#7 0x5625e5152baf in test_and_print tests/builtin-test.c:388
      Freescale#8 0x5625e51543fe in __cmd_test tests/builtin-test.c:583
      Freescale#9 0x5625e515572f in cmd_test tests/builtin-test.c:722
      Freescale#10 0x5625e51c3fb8 in run_builtin /home/changbin/work/linux/tools/perf/perf.c:302
      Freescale#11 0x5625e51c44f7 in handle_internal_command /home/changbin/work/linux/tools/perf/perf.c:354
      Freescale#12 0x5625e51c48fb in run_argv /home/changbin/work/linux/tools/perf/perf.c:398
      Freescale#13 0x5625e51c5069 in main /home/changbin/work/linux/tools/perf/perf.c:520
      Freescale#14 0x7f033214d09a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)

Signed-off-by: Changbin Du <changbin.du@gmail.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Fixes: f30a79b ("perf tools: Add reference counting for cpu_map object")
Link: http://lkml.kernel.org/r/20190316080556.3075-15-changbin.du@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

tools/perf/tests/openat-syscall-all-cpus.c

@@ -38,7 +38,7 @@ int test__openat_syscall_event_on_all_cpus(int subtest __maybe_unused)
 	if (IS_ERR(evsel)) {
 		tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "syscalls", "sys_enter_openat");
 		pr_debug("%s\n", errbuf);
-		goto out_thread_map_delete;
+		goto out_cpu_map_delete;
 	}
 
 	if (perf_evsel__open(evsel, cpus, threads) < 0) {
@@ -112,6 +112,8 @@ int test__openat_syscall_event_on_all_cpus(int subtest __maybe_unused)
 	perf_evsel__close_fd(evsel, 1, threads->nr);
 out_evsel_delete:
 	perf_evsel__delete(evsel);
+out_cpu_map_delete:
+	cpu_map__put(cpus);
 out_thread_map_delete:
 	thread_map__put(threads);
 	return err;