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 <[email protected]> --- .../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
