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