// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 Facebook
#include <test_progs.h>
#include "test_stacktrace_build_id.skel.h"

void test_get_stackid_cannot_attach(void)
{
        struct perf_event_attr attr = {
                /* .type = PERF_TYPE_SOFTWARE, */
                .type = PERF_TYPE_HARDWARE,
                .config = PERF_COUNT_HW_CPU_CYCLES,
                .precise_ip = 1,
                .sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_BRANCH_STACK,
                .branch_sample_type = PERF_SAMPLE_BRANCH_USER |
                        PERF_SAMPLE_BRANCH_NO_FLAGS |
                        PERF_SAMPLE_BRANCH_NO_CYCLES |
                        PERF_SAMPLE_BRANCH_CALL_STACK,
                .sample_period = 5000,
                .size = sizeof(struct perf_event_attr),
        };
        struct test_stacktrace_build_id *skel;
        __u32 duration = 0;
        int pmu_fd, err;

        skel = test_stacktrace_build_id__open();
        if (CHECK(!skel, "skel_open", "skeleton open failed\n"))
                return;

        /* override program type */
        bpf_program__set_type(skel->progs.oncpu, BPF_PROG_TYPE_PERF_EVENT);

        err = test_stacktrace_build_id__load(skel);
        if (CHECK(err, "skel_load", "skeleton load failed: %d\n", err))
                goto cleanup;

        pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
                         0 /* cpu 0 */, -1 /* group id */,
                         0 /* flags */);
        if (pmu_fd < 0 && (errno == ENOENT || errno == EOPNOTSUPP)) {
                printf("%s:SKIP:cannot open PERF_COUNT_HW_CPU_CYCLES with precise_ip > 0\n",
                       __func__);
                test__skip();
                goto cleanup;
        }
        if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
                  pmu_fd, errno))
                goto cleanup;

        skel->links.oncpu = bpf_program__attach_perf_event(skel->progs.oncpu,
                                                           pmu_fd);
        ASSERT_ERR_PTR(skel->links.oncpu, "attach_perf_event_no_callchain");
        close(pmu_fd);

        /* add PERF_SAMPLE_CALLCHAIN, attach should succeed */
        attr.sample_type |= PERF_SAMPLE_CALLCHAIN;

        pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
                         0 /* cpu 0 */, -1 /* group id */,
                         0 /* flags */);

        if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
                  pmu_fd, errno))
                goto cleanup;

        skel->links.oncpu = bpf_program__attach_perf_event(skel->progs.oncpu,
                                                           pmu_fd);
        ASSERT_OK_PTR(skel->links.oncpu, "attach_perf_event_callchain");
        bpf_link__destroy(skel->links.oncpu);
        close(pmu_fd);

        /* add exclude_callchain_kernel, attach should fail */
        attr.exclude_callchain_kernel = 1;

        pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
                         0 /* cpu 0 */, -1 /* group id */,
                         0 /* flags */);

        if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",
                  pmu_fd, errno))
                goto cleanup;

        skel->links.oncpu = bpf_program__attach_perf_event(skel->progs.oncpu,
                                                           pmu_fd);
        ASSERT_ERR_PTR(skel->links.oncpu, "attach_perf_event_exclude_callchain_kernel");
        close(pmu_fd);

cleanup:
        test_stacktrace_build_id__destroy(skel);
}