Commit 3490d299 authored by Jiri Olsa's avatar Jiri Olsa Committed by Alexei Starovoitov
Browse files

selftests/bpf: Add stacktrace ips test for raw_tp 



Adding test that verifies we get expected initial 2 entries from
stacktrace for rawtp probe via ORC unwind.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20251104215405.168643-5-jolsa@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
parent c9e208fa

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

+46 −0
Original line number Diff line number Diff line
@@ -84,12 +84,58 @@ static void test_stacktrace_ips_kprobe_multi(bool retprobe) 
	stacktrace_ips__destroy(skel);

}



static void test_stacktrace_ips_raw_tp(void)

{

	__u32 info_len = sizeof(struct bpf_prog_info);

	LIBBPF_OPTS(bpf_test_run_opts, topts);

	struct bpf_prog_info info = {};

	struct stacktrace_ips *skel;

	__u64 bpf_prog_ksym = 0;

	int err;



	skel = stacktrace_ips__open_and_load();

	if (!ASSERT_OK_PTR(skel, "stacktrace_ips__open_and_load"))

		return;



	if (!skel->kconfig->CONFIG_UNWINDER_ORC) {

		test__skip();

		goto cleanup;

	}



	skel->links.rawtp_test = bpf_program__attach_raw_tracepoint(

							skel->progs.rawtp_test,

							"bpf_testmod_test_read");

	if (!ASSERT_OK_PTR(skel->links.rawtp_test, "bpf_program__attach_raw_tracepoint"))

		goto cleanup;



	/* get bpf program address */

	info.jited_ksyms = ptr_to_u64(&bpf_prog_ksym);

	info.nr_jited_ksyms = 1;

	err = bpf_prog_get_info_by_fd(bpf_program__fd(skel->progs.rawtp_test),

				      &info, &info_len);

	if (!ASSERT_OK(err, "bpf_prog_get_info_by_fd"))

		goto cleanup;



	trigger_module_test_read(1);



	load_kallsyms();



	check_stacktrace_ips(bpf_map__fd(skel->maps.stackmap), skel->bss->stack_key, 2,

			     bpf_prog_ksym,

			     ksym_get_addr("bpf_trace_run2"));



cleanup:

	stacktrace_ips__destroy(skel);

}



static void __test_stacktrace_ips(void)

{

	if (test__start_subtest("kprobe_multi"))

		test_stacktrace_ips_kprobe_multi(false);

	if (test__start_subtest("kretprobe_multi"))

		test_stacktrace_ips_kprobe_multi(true);

	if (test__start_subtest("raw_tp"))

		test_stacktrace_ips_raw_tp();

}

#else

static void __test_stacktrace_ips(void)

tools/testing/selftests/bpf/progs/stacktrace_ips.c

+8 −0
Original line number Diff line number Diff line
@@ -38,4 +38,12 @@ int kprobe_multi_test(struct pt_regs *ctx) 
	return 0;

}



SEC("raw_tp/bpf_testmod_test_read")

int rawtp_test(void *ctx)

{

	/* Skip ebpf program entry in the stack. */

	stack_key = bpf_get_stackid(ctx, &stackmap, 0);

	return 0;

}



char _license[] SEC("license") = "GPL";