perf top: Add exit routine for main thread

Add exit_process_thread that reverses init_process_thread. This avoids
leak sanitizer reporting memory leaks.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Brian Robbins <brianrob@linux.microsoft.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Fangrui Song <maskray@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Babrou <ivan@cloudflare.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Wenyu Liu <liuwenyu7@huawei.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Ye Xingchen <ye.xingchen@zte.com.cn>
Cc: Yuan Can <yuancan@huawei.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230608232823.4027869-23-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-top.c

@@ -392,7 +392,7 @@ static void prompt_percent(int *target, const char *msg)
 
 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
 {
-	char *buf = malloc(0), *p;
+	char *buf = NULL, *p;
 	struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
 	struct hists *hists = evsel__hists(top->sym_evsel);
 	struct rb_node *next;
@@ -1227,6 +1227,14 @@ static void init_process_thread(struct perf_top *top)
 	cond_init(&top->qe.cond);
 }
 
+static void exit_process_thread(struct perf_top *top)
+{
+	ordered_events__free(&top->qe.data[0]);
+	ordered_events__free(&top->qe.data[1]);
+	mutex_destroy(&top->qe.mutex);
+	cond_destroy(&top->qe.cond);
+}
+
 static int __cmd_top(struct perf_top *top)
 {
 	struct record_opts *opts = &top->record_opts;
@@ -1357,6 +1365,7 @@ static int __cmd_top(struct perf_top *top)
 	cond_signal(&top->qe.cond);
 	pthread_join(thread_process, NULL);
 	perf_set_singlethreaded();
+	exit_process_thread(top);
 	return ret;
 }