selftests/bpf: switch test to new attach_perf_event API (8c51b314) · Commits · 戴 / test

tools/testing/selftests/bpf/prog_tests/stacktrace_build_id_nmi.c

+15 −16

Original line number	Diff line number	Diff line
		@@ -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 = {
		@@ -25,7 +26,9 @@ 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;
		struct bpf_link *link;
		char buf[256];
		int i, j;
		struct bpf_stack_build_id id_offs[PERF_MAX_STACK_DEPTH];
		@@ -39,6 +42,10 @@ retry:
		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 */);
		@@ -47,15 +54,12 @@ retry:
		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))
		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;
		link = bpf_program__attach_perf_event(prog, pmu_fd);
		if (CHECK(IS_ERR(link), "attach_perf_event",
		"err %ld\n", PTR_ERR(link))) {
		close(pmu_fd);
		goto close_prog;
		}

		/* find map fds */
		control_map_fd = bpf_find_map(__func__, obj, "control_map");
		@@ -134,8 +138,7 @@ retry:
		* try it one more time.
		*/
		if (build_id_matches < 1 && retry--) {
		ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);
		close(pmu_fd);
		bpf_link__destroy(link);
		bpf_object__close(obj);
		printf("%s:WARN:Didn't find expected build ID from the map, retrying\n",
		__func__);
		@@ -154,11 +157,7 @@ retry:
		*/

		disable_pmu:
		ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE);

		close_pmu:
		close(pmu_fd);

		bpf_link__destroy(link);
		close_prog:
		bpf_object__close(obj);
		}

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