Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
4 * Copyright (c) 2024 David Vernet <dvernet@meta.com>
5 */
6#include <bpf/bpf.h>
7#include <sched.h>
8#include <scx/common.h>
9#include <sys/wait.h>
10#include <unistd.h>
11#include "exit.bpf.skel.h"
12#include "scx_test.h"
13
14#include "exit_test.h"
15
16static enum scx_test_status run(void *ctx)
17{
18 enum exit_test_case tc;
19
20 for (tc = 0; tc < NUM_EXITS; tc++) {
21 struct exit *skel;
22 struct bpf_link *link;
23 char buf[16];
24
25 skel = exit__open();
26 skel->rodata->exit_point = tc;
27 exit__load(skel);
28 link = bpf_map__attach_struct_ops(skel->maps.exit_ops);
29 if (!link) {
30 SCX_ERR("Failed to attach scheduler");
31 exit__destroy(skel);
32 return SCX_TEST_FAIL;
33 }
34
35 /* Assumes uei.kind is written last */
36 while (skel->data->uei.kind == EXIT_KIND(SCX_EXIT_NONE))
37 sched_yield();
38
39 SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_UNREG_BPF));
40 SCX_EQ(skel->data->uei.exit_code, tc);
41 sprintf(buf, "%d", tc);
42 SCX_ASSERT(!strcmp(skel->data->uei.msg, buf));
43 bpf_link__destroy(link);
44 exit__destroy(skel);
45 }
46
47 return SCX_TEST_PASS;
48}
49
50struct scx_test exit_test = {
51 .name = "exit",
52 .description = "Verify we can cleanly exit a scheduler in multiple places",
53 .run = run,
54};
55REGISTER_SCX_TEST(&exit_test)