Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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}