1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2019 Facebook
3 #include <test_progs.h>
libbpf_debug_print(enum libbpf_print_level level,const char * format,va_list args)4 static int libbpf_debug_print(enum libbpf_print_level level,
5 const char *format, va_list args)
6 {
7 if (level != LIBBPF_DEBUG) {
8 vprintf(format, args);
9 return 0;
10 }
11
12 if (!strstr(format, "verifier log"))
13 return 0;
14 vprintf("%s", args);
15 return 0;
16 }
17
check_load(const char * file,enum bpf_prog_type type)18 static int check_load(const char *file, enum bpf_prog_type type)
19 {
20 struct bpf_prog_load_attr attr;
21 struct bpf_object *obj = NULL;
22 int err, prog_fd;
23
24 memset(&attr, 0, sizeof(struct bpf_prog_load_attr));
25 attr.file = file;
26 attr.prog_type = type;
27 attr.log_level = 4;
28 attr.prog_flags = BPF_F_TEST_RND_HI32;
29 err = bpf_prog_load_xattr(&attr, &obj, &prog_fd);
30 bpf_object__close(obj);
31 return err;
32 }
33
34 struct scale_test_def {
35 const char *file;
36 enum bpf_prog_type attach_type;
37 bool fails;
38 };
39
test_bpf_verif_scale(void)40 void test_bpf_verif_scale(void)
41 {
42 struct scale_test_def tests[] = {
43 { "loop3.o", BPF_PROG_TYPE_RAW_TRACEPOINT, true /* fails */ },
44
45 { "test_verif_scale1.o", BPF_PROG_TYPE_SCHED_CLS },
46 { "test_verif_scale2.o", BPF_PROG_TYPE_SCHED_CLS },
47 { "test_verif_scale3.o", BPF_PROG_TYPE_SCHED_CLS },
48
49 /* full unroll by llvm */
50 { "pyperf50.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
51 { "pyperf100.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
52 { "pyperf180.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
53
54 /* partial unroll. llvm will unroll loop ~150 times.
55 * C loop count -> 600.
56 * Asm loop count -> 4.
57 * 16k insns in loop body.
58 * Total of 5 such loops. Total program size ~82k insns.
59 */
60 { "pyperf600.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
61
62 /* no unroll at all.
63 * C loop count -> 600.
64 * ASM loop count -> 600.
65 * ~110 insns in loop body.
66 * Total of 5 such loops. Total program size ~1500 insns.
67 */
68 { "pyperf600_nounroll.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
69
70 { "loop1.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
71 { "loop2.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
72 { "loop4.o", BPF_PROG_TYPE_SCHED_CLS },
73 { "loop5.o", BPF_PROG_TYPE_SCHED_CLS },
74
75 /* partial unroll. 19k insn in a loop.
76 * Total program size 20.8k insn.
77 * ~350k processed_insns
78 */
79 { "strobemeta.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
80
81 /* no unroll, tiny loops */
82 { "strobemeta_nounroll1.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
83 { "strobemeta_nounroll2.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
84
85 { "test_sysctl_loop1.o", BPF_PROG_TYPE_CGROUP_SYSCTL },
86 { "test_sysctl_loop2.o", BPF_PROG_TYPE_CGROUP_SYSCTL },
87
88 { "test_xdp_loop.o", BPF_PROG_TYPE_XDP },
89 { "test_seg6_loop.o", BPF_PROG_TYPE_LWT_SEG6LOCAL },
90 };
91 libbpf_print_fn_t old_print_fn = NULL;
92 int err, i;
93
94 if (env.verifier_stats) {
95 test__force_log();
96 old_print_fn = libbpf_set_print(libbpf_debug_print);
97 }
98
99 for (i = 0; i < ARRAY_SIZE(tests); i++) {
100 const struct scale_test_def *test = &tests[i];
101
102 if (!test__start_subtest(test->file))
103 continue;
104
105 err = check_load(test->file, test->attach_type);
106 CHECK_FAIL(err && !test->fails);
107 }
108
109 if (env.verifier_stats)
110 libbpf_set_print(old_print_fn);
111 }
112
