1// SPDX-License-Identifier: GPL-2.0
2// Copyright (c) 2020 Facebook
3#include <test_progs.h>
4#include "test_stacktrace_build_id.skel.h"
5
6void test_get_stackid_cannot_attach(void)
7{
8	struct perf_event_attr attr = {
9		/* .type = PERF_TYPE_SOFTWARE, */
10		.type = PERF_TYPE_HARDWARE,
11		.config = PERF_COUNT_HW_CPU_CYCLES,
12		.precise_ip = 1,
13		.sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_BRANCH_STACK,
14		.branch_sample_type = PERF_SAMPLE_BRANCH_USER |
15			PERF_SAMPLE_BRANCH_NO_FLAGS |
16			PERF_SAMPLE_BRANCH_NO_CYCLES |
17			PERF_SAMPLE_BRANCH_CALL_STACK,
18		.sample_period = 5000,
19		.size = sizeof(struct perf_event_attr),
20	};
21	struct test_stacktrace_build_id *skel;
22	__u32 duration = 0;
23	int pmu_fd, err;
24
25	skel = test_stacktrace_build_id__open();
26	if (CHECK(!skel, "skel_open", "skeleton open failed\n"))
27		return;
28
29	/* override program type */
30	bpf_program__set_type(skel->progs.oncpu, BPF_PROG_TYPE_PERF_EVENT);
31
32	err = test_stacktrace_build_id__load(skel);
33	if (CHECK(err, "skel_load", "skeleton load failed: %d\n", err))
34		goto cleanup;
35
36	pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
37			 0 /* cpu 0 */, -1 /* group id */,
38			 0 /* flags */);
39	if (pmu_fd < 0 && (errno == ENOENT || errno == EOPNOTSUPP)) {
40		printf("%s:SKIP:cannot open PERF_COUNT_HW_CPU_CYCLES with precise_ip > 0\n",
41		       __func__);
42		test__skip();
43		goto cleanup;
44	}
45	if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
46		  pmu_fd, errno))
47		goto cleanup;
48
49	skel->links.oncpu = bpf_program__attach_perf_event(skel->progs.oncpu,
50							   pmu_fd);
51	ASSERT_ERR_PTR(skel->links.oncpu, "attach_perf_event_no_callchain");
52	close(pmu_fd);
53
54	/* add PERF_SAMPLE_CALLCHAIN, attach should succeed */
55	attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
56
57	pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
58			 0 /* cpu 0 */, -1 /* group id */,
59			 0 /* flags */);
60
61	if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
62		  pmu_fd, errno))
63		goto cleanup;
64
65	skel->links.oncpu = bpf_program__attach_perf_event(skel->progs.oncpu,
66							   pmu_fd);
67	ASSERT_OK_PTR(skel->links.oncpu, "attach_perf_event_callchain");
68	close(pmu_fd);
69
70	/* add exclude_callchain_kernel, attach should fail */
71	attr.exclude_callchain_kernel = 1;
72
73	pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
74			 0 /* cpu 0 */, -1 /* group id */,
75			 0 /* flags */);
76
77	if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
78		  pmu_fd, errno))
79		goto cleanup;
80
81	skel->links.oncpu = bpf_program__attach_perf_event(skel->progs.oncpu,
82							   pmu_fd);
83	ASSERT_ERR_PTR(skel->links.oncpu, "attach_perf_event_exclude_callchain_kernel");
84	close(pmu_fd);
85
86cleanup:
87	test_stacktrace_build_id__destroy(skel);
88}
89