Adding test that makes sure parallel execution of the uprobe and
attach/detach of optimized uprobe on it works properly.
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
.../bpf/prog_tests/uprobe_optimized.c | 60 +++++++++++++++++++
1 file changed, 60 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/uprobe_optimized.c b/tools/testing/selftests/bpf/prog_tests/uprobe_optimized.c
index f6eb4089b1e2..4b9a579c232d 100644
--- a/tools/testing/selftests/bpf/prog_tests/uprobe_optimized.c
+++ b/tools/testing/selftests/bpf/prog_tests/uprobe_optimized.c
@@ -170,6 +170,64 @@ static void test_usdt(void)
uprobe_optimized__destroy(skel);
}
+static bool race_stop;
+
+static void *worker(void*)
+{
+ while (!race_stop)
+ uprobe_test();
+ return NULL;
+}
+
+static void test_race(void)
+{
+ int err, i, nr_cpus, rounds = 0;
+ struct uprobe_optimized *skel;
+ pthread_t *threads;
+ time_t start;
+
+ nr_cpus = libbpf_num_possible_cpus();
+ if (!ASSERT_GE(nr_cpus, 0, "nr_cpus"))
+ return;
+
+ threads = malloc(sizeof(*threads) * nr_cpus);
+ if (!ASSERT_OK_PTR(threads, "malloc"))
+ return;
+
+ for (i = 0; i < nr_cpus; i++) {
+ err = pthread_create(&threads[i], NULL, worker, NULL);
+ if (!ASSERT_OK(err, "pthread_create"))
+ goto cleanup;
+ }
+
+ skel = uprobe_optimized__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "uprobe_optimized__open_and_load"))
+ goto cleanup;
+
+ start = time(NULL);
+ while (1) {
+ skel->links.test_2 = bpf_program__attach_uprobe_multi(skel->progs.test_2, -1,
+ "/proc/self/exe", "uprobe_test", NULL);
+ if (!ASSERT_OK_PTR(skel->links.test_2, "bpf_program__attach_uprobe_multi"))
+ break;
+
+ bpf_link__destroy(skel->links.test_2);
+ skel->links.test_2 = NULL;
+ rounds++;
+
+ if (start + 2 < time(NULL))
+ break;
+ }
+
+ printf("rounds: %d hits: %d\n", rounds, skel->bss->executed);
+
+cleanup:
+ race_stop = true;
+ for (i = 0; i < nr_cpus; i++)
+ pthread_join(threads[i], NULL);
+ uprobe_optimized__destroy(skel);
+}
+
static void test_optimized(void)
{
if (test__start_subtest("uprobe"))
@@ -178,6 +236,8 @@ static void test_optimized(void)
test_uprobe_multi();
if (test__start_subtest("usdt"))
test_usdt();
+ if (test__start_subtest("race"))
+ test_race();
}
#else
static void test_optimized(void)
--
2.47.0
