diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/ksyms.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/ksyms.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/ksyms.c b/tools/testing/selftests/bpf/prog_tests/ksyms.c new file mode 100644 index 000000000..b295969b2 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/ksyms.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2019 Facebook */ + +#include <test_progs.h> +#include "test_ksyms.skel.h" +#include <sys/stat.h> + +static int duration; + +void test_ksyms(void) +{ + const char *btf_path = "/sys/kernel/btf/vmlinux"; + struct test_ksyms *skel; + struct test_ksyms__data *data; + __u64 link_fops_addr, per_cpu_start_addr; + struct stat st; + __u64 btf_size; + int err; + + err = kallsyms_find("bpf_link_fops", &link_fops_addr); + if (CHECK(err == -EINVAL, "kallsyms_fopen", "failed to open: %d\n", errno)) + return; + if (CHECK(err == -ENOENT, "ksym_find", "symbol 'bpf_link_fops' not found\n")) + return; + + err = kallsyms_find("__per_cpu_start", &per_cpu_start_addr); + if (CHECK(err == -EINVAL, "kallsyms_fopen", "failed to open: %d\n", errno)) + return; + if (CHECK(err == -ENOENT, "ksym_find", "symbol 'per_cpu_start' not found\n")) + return; + + if (CHECK(stat(btf_path, &st), "stat_btf", "err %d\n", errno)) + return; + btf_size = st.st_size; + + skel = test_ksyms__open_and_load(); + if (CHECK(!skel, "skel_open", "failed to open and load skeleton\n")) + return; + + err = test_ksyms__attach(skel); + if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) + goto cleanup; + + /* trigger tracepoint */ + usleep(1); + + data = skel->data; + CHECK(data->out__bpf_link_fops != link_fops_addr, "bpf_link_fops", + "got 0x%llx, exp 0x%llx\n", + data->out__bpf_link_fops, link_fops_addr); + CHECK(data->out__bpf_link_fops1 != 0, "bpf_link_fops1", + "got %llu, exp %llu\n", data->out__bpf_link_fops1, (__u64)0); + CHECK(data->out__btf_size != btf_size, "btf_size", + "got %llu, exp %llu\n", data->out__btf_size, btf_size); + CHECK(data->out__per_cpu_start != per_cpu_start_addr, "__per_cpu_start", + "got %llu, exp %llu\n", data->out__per_cpu_start, + per_cpu_start_addr); + +cleanup: + test_ksyms__destroy(skel); +} |