projects/linux·blob master · refs

60 lines · 1.9 KiB

1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
3
4#include <test_progs.h>
5#include "verifier_global_subprogs.skel.h"
6#include "freplace_dead_global_func.skel.h"
7
8void test_global_func_dead_code(void)
9{
10 struct verifier_global_subprogs *tgt_skel = NULL;
11 struct freplace_dead_global_func *skel = NULL;
12 char log_buf[4096];
13 int err, tgt_fd;
14
15 /* first, try to load target with good global subprog */
16 tgt_skel = verifier_global_subprogs__open();
17 if (!ASSERT_OK_PTR(tgt_skel, "tgt_skel_good_open"))
18 return;
19
20 bpf_program__set_autoload(tgt_skel->progs.chained_global_func_calls_success, true);
21
22 err = verifier_global_subprogs__load(tgt_skel);
23 if (!ASSERT_OK(err, "tgt_skel_good_load"))
24 goto out;
25
26 tgt_fd = bpf_program__fd(tgt_skel->progs.chained_global_func_calls_success);
27
28 /* Attach to good non-eliminated subprog */
29 skel = freplace_dead_global_func__open();
30 if (!ASSERT_OK_PTR(skel, "skel_good_open"))
31 goto out;
32
33 err = bpf_program__set_attach_target(skel->progs.freplace_prog, tgt_fd, "global_good");
34 ASSERT_OK(err, "attach_target_good");
35
36 err = freplace_dead_global_func__load(skel);
37 if (!ASSERT_OK(err, "skel_good_load"))
38 goto out;
39
40 freplace_dead_global_func__destroy(skel);
41
42 /* Try attaching to dead code-eliminated subprog */
43 skel = freplace_dead_global_func__open();
44 if (!ASSERT_OK_PTR(skel, "skel_dead_open"))
45 goto out;
46
47 bpf_program__set_log_buf(skel->progs.freplace_prog, log_buf, sizeof(log_buf));
48 err = bpf_program__set_attach_target(skel->progs.freplace_prog, tgt_fd, "global_dead");
49 ASSERT_OK(err, "attach_target_dead");
50
51 err = freplace_dead_global_func__load(skel);
52 if (!ASSERT_ERR(err, "skel_dead_load"))
53 goto out;
54
55 ASSERT_HAS_SUBSTR(log_buf, "Subprog global_dead doesn't exist", "dead_subprog_missing_msg");
56
57out:
58 verifier_global_subprogs__destroy(tgt_skel);
59 freplace_dead_global_func__destroy(skel);
60}