// 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);}