--- zzzz-none-000/linux-3.10.107/tools/perf/tests/task-exit.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/tools/perf/tests/task-exit.c	2021-02-04 17:41:59.000000000 +0000
@@ -9,12 +9,21 @@
 static int exited;
 static int nr_exit;
 
-static void sig_handler(int sig)
+static void sig_handler(int sig __maybe_unused)
 {
 	exited = 1;
+}
 
-	if (sig == SIGUSR1)
-		nr_exit = -1;
+/*
+ * perf_evlist__prepare_workload will send a SIGUSR1 if the fork fails, since
+ * we asked by setting its exec_error to this handler.
+ */
+static void workload_exec_failed_signal(int signo __maybe_unused,
+					siginfo_t *info __maybe_unused,
+					void *ucontext __maybe_unused)
+{
+	exited	= 1;
+	nr_exit = -1;
 }
 
 /*
@@ -28,29 +37,22 @@
 	union perf_event *event;
 	struct perf_evsel *evsel;
 	struct perf_evlist *evlist;
-	struct perf_target target = {
+	struct target target = {
 		.uid		= UINT_MAX,
 		.uses_mmap	= true,
 	};
 	const char *argv[] = { "true", NULL };
+	char sbuf[STRERR_BUFSIZE];
+	struct cpu_map *cpus;
+	struct thread_map *threads;
 
 	signal(SIGCHLD, sig_handler);
-	signal(SIGUSR1, sig_handler);
 
-	evlist = perf_evlist__new();
+	evlist = perf_evlist__new_default();
 	if (evlist == NULL) {
-		pr_debug("perf_evlist__new\n");
+		pr_debug("perf_evlist__new_default\n");
 		return -1;
 	}
-	/*
-	 * We need at least one evsel in the evlist, use the default
-	 * one: "cycles".
-	 */
-	err = perf_evlist__add_default(evlist);
-	if (err < 0) {
-		pr_debug("Not enough memory to create evsel\n");
-		goto out_free_evlist;
-	}
 
 	/*
 	 * Create maps of threads and cpus to monitor. In this case
@@ -58,18 +60,24 @@
 	 * perf_evlist__prepare_workload we'll fill in the only thread
 	 * we're monitoring, the one forked there.
 	 */
-	evlist->cpus = cpu_map__dummy_new();
-	evlist->threads = thread_map__new_by_tid(-1);
-	if (!evlist->cpus || !evlist->threads) {
+	cpus = cpu_map__dummy_new();
+	threads = thread_map__new_by_tid(-1);
+	if (!cpus || !threads) {
 		err = -ENOMEM;
 		pr_debug("Not enough memory to create thread/cpu maps\n");
-		goto out_delete_maps;
+		goto out_free_maps;
 	}
 
-	err = perf_evlist__prepare_workload(evlist, &target, argv, false, true);
+	perf_evlist__set_maps(evlist, cpus, threads);
+
+	cpus	= NULL;
+	threads = NULL;
+
+	err = perf_evlist__prepare_workload(evlist, &target, argv, false,
+					    workload_exec_failed_signal);
 	if (err < 0) {
 		pr_debug("Couldn't run the workload!\n");
-		goto out_delete_maps;
+		goto out_delete_evlist;
 	}
 
 	evsel = perf_evlist__first(evlist);
@@ -82,28 +90,29 @@
 
 	err = perf_evlist__open(evlist);
 	if (err < 0) {
-		pr_debug("Couldn't open the evlist: %s\n", strerror(-err));
-		goto out_delete_maps;
+		pr_debug("Couldn't open the evlist: %s\n",
+			 strerror_r(-err, sbuf, sizeof(sbuf)));
+		goto out_delete_evlist;
 	}
 
 	if (perf_evlist__mmap(evlist, 128, true) < 0) {
 		pr_debug("failed to mmap events: %d (%s)\n", errno,
-			 strerror(errno));
-		goto out_close_evlist;
+			 strerror_r(errno, sbuf, sizeof(sbuf)));
+		goto out_delete_evlist;
 	}
 
 	perf_evlist__start_workload(evlist);
 
 retry:
 	while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
-		if (event->header.type != PERF_RECORD_EXIT)
-			continue;
+		if (event->header.type == PERF_RECORD_EXIT)
+			nr_exit++;
 
-		nr_exit++;
+		perf_evlist__mmap_consume(evlist, 0);
 	}
 
 	if (!exited || !nr_exit) {
-		poll(evlist->pollfd, evlist->nr_fds, -1);
+		perf_evlist__poll(evlist, -1);
 		goto retry;
 	}
 
@@ -112,12 +121,10 @@
 		err = -1;
 	}
 
-	perf_evlist__munmap(evlist);
-out_close_evlist:
-	perf_evlist__close(evlist);
-out_delete_maps:
-	perf_evlist__delete_maps(evlist);
-out_free_evlist:
+out_free_maps:
+	cpu_map__put(cpus);
+	thread_map__put(threads);
+out_delete_evlist:
 	perf_evlist__delete(evlist);
 	return err;
 }