1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2020 Facebook 3 #define _GNU_SOURCE 4 #include <test_progs.h> 5 #include "test_core_retro.skel.h" 6 7 void test_core_retro(void) 8 { 9 int err, zero = 0, res, duration = 0, my_pid = getpid(); 10 struct test_core_retro *skel; 11 12 /* load program */ 13 skel = test_core_retro__open_and_load(); 14 if (CHECK(!skel, "skel_load", "skeleton open/load failed\n")) 15 goto out_close; 16 17 err = bpf_map_update_elem(bpf_map__fd(skel->maps.exp_tgid_map), &zero, &my_pid, 0); 18 if (CHECK(err, "map_update", "failed to set expected PID: %d\n", errno)) 19 goto out_close; 20 21 /* attach probe */ 22 err = test_core_retro__attach(skel); 23 if (CHECK(err, "attach_kprobe", "err %d\n", err)) 24 goto out_close; 25 26 /* trigger */ 27 usleep(1); 28 29 err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.results), &zero, &res); 30 if (CHECK(err, "map_lookup", "failed to lookup result: %d\n", errno)) 31 goto out_close; 32 33 CHECK(res != my_pid, "pid_check", "got %d != exp %d\n", res, my_pid); 34 35 out_close: 36 test_core_retro__destroy(skel); 37 } 38