1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019 Facebook */
3 #include <test_progs.h>
6 void serial_test_fexit_stress(void)
8 int bpf_max_tramp_links, err, i;
9 int *fd, *fexit_fd, *link_fd;
11 bpf_max_tramp_links = get_bpf_max_tramp_links();
12 if (!ASSERT_GE(bpf_max_tramp_links, 1, "bpf_max_tramp_links"))
14 fd = calloc(bpf_max_tramp_links * 2, sizeof(*fd));
15 if (!ASSERT_OK_PTR(fd, "fd"))
18 link_fd = fd + bpf_max_tramp_links;
20 const struct bpf_insn trace_program[] = {
21 BPF_MOV64_IMM(BPF_REG_0, 0),
25 LIBBPF_OPTS(bpf_prog_load_opts, trace_opts,
26 .expected_attach_type = BPF_TRACE_FEXIT,
29 LIBBPF_OPTS(bpf_test_run_opts, topts);
31 err = libbpf_find_vmlinux_btf_id("bpf_fentry_test1",
32 trace_opts.expected_attach_type);
33 if (!ASSERT_GT(err, 0, "find_vmlinux_btf_id"))
35 trace_opts.attach_btf_id = err;
37 for (i = 0; i < bpf_max_tramp_links; i++) {
38 fexit_fd[i] = bpf_prog_load(BPF_PROG_TYPE_TRACING, NULL, "GPL",
40 ARRAY_SIZE(trace_program),
42 if (!ASSERT_GE(fexit_fd[i], 0, "fexit load"))
44 link_fd[i] = bpf_link_create(fexit_fd[i], 0, BPF_TRACE_FEXIT, NULL);
45 if (!ASSERT_GE(link_fd[i], 0, "fexit attach"))
49 err = bpf_prog_test_run_opts(fexit_fd[0], &topts);
50 ASSERT_OK(err, "bpf_prog_test_run_opts");
53 for (i = 0; i < bpf_max_tramp_links; i++) {