1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019 Facebook */
3
4 #include <test_progs.h>
5 #include "test_ksyms.skel.h"
6 #include <sys/stat.h>
7
8 void test_ksyms(void)
9 {
10 const char *btf_path = "/sys/kernel/btf/vmlinux";
11 struct test_ksyms *skel;
12 struct test_ksyms__data *data;
13 __u64 link_fops_addr, per_cpu_start_addr;
14 struct stat st;
15 __u64 btf_size;
16 int err;
17
18 err = kallsyms_find("bpf_link_fops", &link_fops_addr);
19 if (!ASSERT_NEQ(err, -EINVAL, "bpf_link_fops: kallsyms_fopen"))
20 return;
21 if (!ASSERT_NEQ(err, -ENOENT, "bpf_link_fops: ksym_find"))
22 return;
23
24 err = kallsyms_find("__per_cpu_start", &per_cpu_start_addr);
25 if (!ASSERT_NEQ(err, -EINVAL, "__per_cpu_start: kallsyms_fopen"))
26 return;
27 if (!ASSERT_NEQ(err, -ENOENT, "__per_cpu_start: ksym_find"))
28 return;
29
30 if (!ASSERT_OK(stat(btf_path, &st), "stat_btf"))
31 return;
32 btf_size = st.st_size;
33
34 skel = test_ksyms__open_and_load();
35 if (!ASSERT_OK_PTR(skel, "test_ksyms__open_and_load"))
36 return;
37
38 err = test_ksyms__attach(skel);
39 if (!ASSERT_OK(err, "test_ksyms__attach"))
40 goto cleanup;
41
42 /* trigger tracepoint */
43 usleep(1);
44
45 data = skel->data;
46 ASSERT_EQ(data->out__bpf_link_fops, link_fops_addr, "bpf_link_fops");
47 ASSERT_EQ(data->out__bpf_link_fops1, 0, "bpf_link_fops1");
48 ASSERT_EQ(data->out__btf_size, btf_size, "btf_size");
49 ASSERT_EQ(data->out__per_cpu_start, per_cpu_start_addr, "__per_cpu_start");
50
51 cleanup:
52 test_ksyms__destroy(skel);
53 }
54
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