1 // SPDX-License-Identifier: GPL-2.0
2 #include <test_progs.h>
3 
test_stacktrace_map_raw_tp(void)4 void test_stacktrace_map_raw_tp(void)
5 {
6 	const char *prog_name = "oncpu";
7 	int control_map_fd, stackid_hmap_fd, stackmap_fd;
8 	const char *file = "./test_stacktrace_map.bpf.o";
9 	__u32 key, val, duration = 0;
10 	int err, prog_fd;
11 	struct bpf_program *prog;
12 	struct bpf_object *obj;
13 	struct bpf_link *link = NULL;
14 
15 	err = bpf_prog_test_load(file, BPF_PROG_TYPE_RAW_TRACEPOINT, &obj, &prog_fd);
16 	if (CHECK(err, "prog_load raw tp", "err %d errno %d\n", err, errno))
17 		return;
18 
19 	prog = bpf_object__find_program_by_name(obj, prog_name);
20 	if (CHECK(!prog, "find_prog", "prog '%s' not found\n", prog_name))
21 		goto close_prog;
22 
23 	link = bpf_program__attach_raw_tracepoint(prog, "sched_switch");
24 	if (!ASSERT_OK_PTR(link, "attach_raw_tp"))
25 		goto close_prog;
26 
27 	/* find map fds */
28 	control_map_fd = bpf_find_map(__func__, obj, "control_map");
29 	if (CHECK_FAIL(control_map_fd < 0))
30 		goto close_prog;
31 
32 	stackid_hmap_fd = bpf_find_map(__func__, obj, "stackid_hmap");
33 	if (CHECK_FAIL(stackid_hmap_fd < 0))
34 		goto close_prog;
35 
36 	stackmap_fd = bpf_find_map(__func__, obj, "stackmap");
37 	if (CHECK_FAIL(stackmap_fd < 0))
38 		goto close_prog;
39 
40 	/* give some time for bpf program run */
41 	sleep(1);
42 
43 	/* disable stack trace collection */
44 	key = 0;
45 	val = 1;
46 	bpf_map_update_elem(control_map_fd, &key, &val, 0);
47 
48 	/* for every element in stackid_hmap, we can find a corresponding one
49 	 * in stackmap, and vise versa.
50 	 */
51 	err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
52 	if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
53 		  "err %d errno %d\n", err, errno))
54 		goto close_prog;
55 
56 	err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
57 	if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
58 		  "err %d errno %d\n", err, errno))
59 		goto close_prog;
60 
61 close_prog:
62 	bpf_link__destroy(link);
63 	bpf_object__close(obj);
64 }
65