stacktrace_map.c

 1// SPDX-License-Identifier: GPL-2.0
 2#include <test_progs.h>
 3#include "stacktrace_map.skel.h"
 4
 5void test_stacktrace_map(void)
 6{
 7	struct stacktrace_map *skel;
 8	int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
 9	int err, stack_trace_len;
10	__u32 key, val, stack_id, duration = 0;
11	__u64 stack[PERF_MAX_STACK_DEPTH];
12
13	skel = stacktrace_map__open_and_load();
14	if (!ASSERT_OK_PTR(skel, "skel_open_and_load"))
15		return;
16
17	control_map_fd = bpf_map__fd(skel->maps.control_map);
18	stackid_hmap_fd = bpf_map__fd(skel->maps.stackid_hmap);
19	stackmap_fd = bpf_map__fd(skel->maps.stackmap);
20	stack_amap_fd = bpf_map__fd(skel->maps.stack_amap);
21
22	err = stacktrace_map__attach(skel);
23	if (!ASSERT_OK(err, "skel_attach"))
24		goto out;
25	/* give some time for bpf program run */
26	sleep(1);
27
28	/* disable stack trace collection */
29	key = 0;
30	val = 1;
31	bpf_map_update_elem(control_map_fd, &key, &val, 0);
32
33	/* for every element in stackid_hmap, we can find a corresponding one
34	 * in stackmap, and vice versa.
35	 */
36	err = compare_map_keys(stackid_hmap_fd, stackmap_fd);
37	if (CHECK(err, "compare_map_keys stackid_hmap vs. stackmap",
38		  "err %d errno %d\n", err, errno))
39		goto out;
40
41	err = compare_map_keys(stackmap_fd, stackid_hmap_fd);
42	if (CHECK(err, "compare_map_keys stackmap vs. stackid_hmap",
43		  "err %d errno %d\n", err, errno))
44		goto out;
45
46	stack_trace_len = PERF_MAX_STACK_DEPTH * sizeof(__u64);
47	err = compare_stack_ips(stackmap_fd, stack_amap_fd, stack_trace_len);
48	if (CHECK(err, "compare_stack_ips stackmap vs. stack_amap",
49		  "err %d errno %d\n", err, errno))
50		goto out;
51
52	stack_id = skel->bss->stack_id;
53	err = bpf_map_lookup_and_delete_elem(stackmap_fd, &stack_id,  stack);
54	if (!ASSERT_OK(err, "lookup and delete target stack_id"))
55		goto out;
56
57	err = bpf_map_lookup_elem(stackmap_fd, &stack_id, stack);
58	if (!ASSERT_EQ(err, -ENOENT, "lookup deleted stack_id"))
59		goto out;
60out:
61	stacktrace_map__destroy(skel);
62}