1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019 Facebook */
3 #include <test_progs.h>
4
5 /* that's kernel internal BPF_MAX_TRAMP_PROGS define */
6 #define CNT 38
7
serial_test_fexit_stress(void)8 void serial_test_fexit_stress(void)
9 {
10 int fexit_fd[CNT] = {};
11 int link_fd[CNT] = {};
12 int err, i;
13
14 const struct bpf_insn trace_program[] = {
15 BPF_MOV64_IMM(BPF_REG_0, 0),
16 BPF_EXIT_INSN(),
17 };
18
19 LIBBPF_OPTS(bpf_prog_load_opts, trace_opts,
20 .expected_attach_type = BPF_TRACE_FEXIT,
21 );
22
23 LIBBPF_OPTS(bpf_test_run_opts, topts);
24
25 err = libbpf_find_vmlinux_btf_id("bpf_fentry_test1",
26 trace_opts.expected_attach_type);
27 if (!ASSERT_GT(err, 0, "find_vmlinux_btf_id"))
28 goto out;
29 trace_opts.attach_btf_id = err;
30
31 for (i = 0; i < CNT; i++) {
32 fexit_fd[i] = bpf_prog_load(BPF_PROG_TYPE_TRACING, NULL, "GPL",
33 trace_program,
34 sizeof(trace_program) / sizeof(struct bpf_insn),
35 &trace_opts);
36 if (!ASSERT_GE(fexit_fd[i], 0, "fexit load"))
37 goto out;
38 link_fd[i] = bpf_link_create(fexit_fd[i], 0, BPF_TRACE_FEXIT, NULL);
39 if (!ASSERT_GE(link_fd[i], 0, "fexit attach"))
40 goto out;
41 }
42
43 err = bpf_prog_test_run_opts(fexit_fd[0], &topts);
44 ASSERT_OK(err, "bpf_prog_test_run_opts");
45
46 out:
47 for (i = 0; i < CNT; i++) {
48 if (link_fd[i])
49 close(link_fd[i]);
50 if (fexit_fd[i])
51 close(fexit_fd[i]);
52 }
53 }
54