This test confirms that BPF program that calls bpf_get_stackid() cannot
attach to perf_event with PEBS entry.
Signed-off-by: Song Liu <songliubrav...@fb.com>
---
.../prog_tests/get_stackid_cannot_attach.c | 57 +++++++++++++++++++
1 file changed, 57 insertions(+)
create mode 100644
tools/testing/selftests/bpf/prog_tests/get_stackid_cannot_attach.c
diff --git a/tools/testing/selftests/bpf/prog_tests/get_stackid_cannot_attach.c
b/tools/testing/selftests/bpf/prog_tests/get_stackid_cannot_attach.c
new file mode 100644
index 0000000000000..ae943c502b62b
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/get_stackid_cannot_attach.c
@@ -0,0 +1,57 @@
+// 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 = 2,
+ .sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_BRANCH_STACK |
+ PERF_SAMPLE_CALLCHAIN,
+ .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_perf_event(skel->progs.oncpu);
+
+ 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) {
+ printf("%s:SKIP:no PERF_COUNT_HW_CPU_CYCLES\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);
+ CHECK(!IS_ERR(skel->links.oncpu), "attach_perf_event",
+ "should have failed\n");
+ close(pmu_fd);
+
+cleanup:
+ test_stacktrace_build_id__destroy(skel);
+}
--
2.24.1
