LXR linux/tools/testing/selftests/bpf/prog_tests/core

   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
   7void 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
  35out_close:
  36        test_core_retro__destroy(skel);
  37}
  38