On 06/20, Andrii Nakryiko wrote:
> Use new bpf_program__attach_perf_event() in test previously relying on
> direct ioctl manipulations.
Maybe use new detach/disable routine at the end of the
test_stacktrace_build_id_nmi as well?
> Signed-off-by: Andrii Nakryiko <andriin@xxxxxx>
> ---
> .../bpf/prog_tests/stacktrace_build_id_nmi.c | 16 ++++++++--------
> 1 file changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/prog_tests/stacktrace_build_id_nmi.c b/tools/testing/selftests/bpf/prog_tests/stacktrace_build_id_nmi.c
> index 1c1a2f75f3d8..1bbdb0b82ac5 100644
> --- a/tools/testing/selftests/bpf/prog_tests/stacktrace_build_id_nmi.c
> +++ b/tools/testing/selftests/bpf/prog_tests/stacktrace_build_id_nmi.c
> @@ -17,6 +17,7 @@ static __u64 read_perf_max_sample_freq(void)
> void test_stacktrace_build_id_nmi(void)
> {
> int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd;
> + const char *prog_name = "tracepoint/random/urandom_read";
> const char *file = "./test_stacktrace_build_id.o";
> int err, pmu_fd, prog_fd;
> struct perf_event_attr attr = {
> @@ -25,6 +26,7 @@ void test_stacktrace_build_id_nmi(void)
> .config = PERF_COUNT_HW_CPU_CYCLES,
> };
> __u32 key, previous_key, val, duration = 0;
> + struct bpf_program *prog;
> struct bpf_object *obj;
> char buf[256];
> int i, j;
> @@ -39,6 +41,10 @@ void test_stacktrace_build_id_nmi(void)
> if (CHECK(err, "prog_load", "err %d errno %d\n", err, errno))
> return;
>
> + prog = bpf_object__find_program_by_title(obj, prog_name);
> + if (CHECK(!prog, "find_prog", "prog '%s' not found\n", prog_name))
> + goto close_prog;
> +
> pmu_fd = syscall(__NR_perf_event_open, &attr, -1 /* pid */,
> 0 /* cpu 0 */, -1 /* group id */,
> 0 /* flags */);
> @@ -47,16 +53,10 @@ void test_stacktrace_build_id_nmi(void)
> pmu_fd, errno))
> goto close_prog;
>
> - err = ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0);
> - if (CHECK(err, "perf_event_ioc_enable", "err %d errno %d\n",
> - err, errno))
> + err = bpf_program__attach_perf_event(prog, pmu_fd);
> + if (CHECK(err, "attach_perf_event", "err %d\n", err))
> goto close_pmu;
>
> - err = ioctl(pmu_fd, PERF_EVENT_IOC_SET_BPF, prog_fd);
> - if (CHECK(err, "perf_event_ioc_set_bpf", "err %d errno %d\n",
> - err, errno))
> - goto disable_pmu;
> -
> /* find map fds */
> control_map_fd = bpf_find_map(__func__, obj, "control_map");
> if (CHECK(control_map_fd < 0, "bpf_find_map control_map",
> --
> 2.17.1
>
