// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2020 Facebook
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#include <test_progs.h>
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#include "test_stacktrace_build_id.skel.h"
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void test_get_stackid_cannot_attach(void)
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{
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struct perf_event_attr attr = {
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/* .type = PERF_TYPE_SOFTWARE, */
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.type = PERF_TYPE_HARDWARE,
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.config = PERF_COUNT_HW_CPU_CYCLES,
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.precise_ip = 1,
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.sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_BRANCH_STACK,
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.branch_sample_type = PERF_SAMPLE_BRANCH_USER |
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PERF_SAMPLE_BRANCH_NO_FLAGS |
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PERF_SAMPLE_BRANCH_NO_CYCLES |
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PERF_SAMPLE_BRANCH_CALL_STACK,
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.sample_period = 5000,
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.size = sizeof(struct perf_event_attr),
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};
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struct test_stacktrace_build_id *skel;
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__u32 duration = 0;
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int pmu_fd, err;
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skel = test_stacktrace_build_id__open();
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if (CHECK(!skel, "skel_open", "skeleton open failed\n"))
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return;
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/* override program type */
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bpf_program__set_perf_event(skel->progs.oncpu);
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err = test_stacktrace_build_id__load(skel);
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if (CHECK(err, "skel_load", "skeleton load failed: %d\n", err))
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goto cleanup;
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pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
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0 /* cpu 0 */, -1 /* group id */,
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0 /* flags */);
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if (pmu_fd < 0 && (errno == ENOENT || errno == EOPNOTSUPP)) {
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printf("%s:SKIP:cannot open PERF_COUNT_HW_CPU_CYCLES with precise_ip > 0\n",
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__func__);
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test__skip();
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goto cleanup;
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}
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if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
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pmu_fd, errno))
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goto cleanup;
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skel->links.oncpu = bpf_program__attach_perf_event(skel->progs.oncpu,
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pmu_fd);
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CHECK(!IS_ERR(skel->links.oncpu), "attach_perf_event_no_callchain",
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"should have failed\n");
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close(pmu_fd);
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/* add PERF_SAMPLE_CALLCHAIN, attach should succeed */
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attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
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pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
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0 /* cpu 0 */, -1 /* group id */,
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0 /* flags */);
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if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
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pmu_fd, errno))
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goto cleanup;
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skel->links.oncpu = bpf_program__attach_perf_event(skel->progs.oncpu,
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pmu_fd);
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CHECK(IS_ERR(skel->links.oncpu), "attach_perf_event_callchain",
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"err: %ld\n", PTR_ERR(skel->links.oncpu));
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close(pmu_fd);
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/* add exclude_callchain_kernel, attach should fail */
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attr.exclude_callchain_kernel = 1;
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pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
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0 /* cpu 0 */, -1 /* group id */,
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0 /* flags */);
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if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
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pmu_fd, errno))
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goto cleanup;
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skel->links.oncpu = bpf_program__attach_perf_event(skel->progs.oncpu,
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pmu_fd);
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CHECK(!IS_ERR(skel->links.oncpu), "attach_perf_event_exclude_callchain_kernel",
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"should have failed\n");
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close(pmu_fd);
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cleanup:
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test_stacktrace_build_id__destroy(skel);
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}
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