90 lines · c
1// SPDX-License-Identifier: GPL-2.02// Copyright (c) 2020 Facebook3#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 bpf_link__destroy(skel->links.oncpu);69 close(pmu_fd);70 71 /* add exclude_callchain_kernel, attach should fail */72 attr.exclude_callchain_kernel = 1;73 74 pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,75 0 /* cpu 0 */, -1 /* group id */,76 0 /* flags */);77 78 if (CHECK(pmu_fd < 0, "perf_event_open", "err %d errno %d\n",79 pmu_fd, errno))80 goto cleanup;81 82 skel->links.oncpu = bpf_program__attach_perf_event(skel->progs.oncpu,83 pmu_fd);84 ASSERT_ERR_PTR(skel->links.oncpu, "attach_perf_event_exclude_callchain_kernel");85 close(pmu_fd);86 87cleanup:88 test_stacktrace_build_id__destroy(skel);89}90