From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33E54C433B4 for ; Tue, 13 Apr 2021 12:16:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 067F461242 for ; Tue, 13 Apr 2021 12:16:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343601AbhDMMQ6 convert rfc822-to-8bit (ORCPT ); Tue, 13 Apr 2021 08:16:58 -0400 Received: from us-smtp-delivery-44.mimecast.com ([207.211.30.44]:21397 "EHLO us-smtp-delivery-44.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345455AbhDMMQV (ORCPT ); Tue, 13 Apr 2021 08:16:21 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-479-uF_9OH82MiWT4X1K6raq6A-1; Tue, 13 Apr 2021 08:15:58 -0400 X-MC-Unique: uF_9OH82MiWT4X1K6raq6A-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7186A186E627; Tue, 13 Apr 2021 12:15:45 +0000 (UTC) Received: from krava.redhat.com (unknown [10.40.196.16]) by smtp.corp.redhat.com (Postfix) with ESMTP id 60F1C10023B0; Tue, 13 Apr 2021 12:15:42 +0000 (UTC) From: Jiri Olsa To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Daniel Xu , Steven Rostedt , Jesper Brouer , =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= , Viktor Malik Subject: [PATCHv2 RFC bpf-next 7/7] selftests/bpf: Add ftrace probe test Date: Tue, 13 Apr 2021 14:15:16 +0200 Message-Id: <20210413121516.1467989-8-jolsa@kernel.org> In-Reply-To: <20210413121516.1467989-1-jolsa@kernel.org> References: <20210413121516.1467989-1-jolsa@kernel.org> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jolsa@kernel.org X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: kernel.org Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset=WINDOWS-1252 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Adding simple ftrace probe test that configures ftrace probe and verifies the 'ip' argument matches the probed functions addresses. Signed-off-by: Jiri Olsa --- .../selftests/bpf/prog_tests/ftrace_test.c | 48 +++++++++++++++++++ .../testing/selftests/bpf/progs/ftrace_test.c | 17 +++++++ 2 files changed, 65 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/ftrace_test.c create mode 100644 tools/testing/selftests/bpf/progs/ftrace_test.c diff --git a/tools/testing/selftests/bpf/prog_tests/ftrace_test.c b/tools/testing/selftests/bpf/prog_tests/ftrace_test.c new file mode 100644 index 000000000000..34d6dbe88251 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/ftrace_test.c @@ -0,0 +1,48 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include "ftrace_test.skel.h" + +void test_ftrace_test(void) +{ + struct ftrace_test *ftrace_skel = NULL; + __u32 duration = 0, retval; + int err, prog_fd; + __u64 *ips; + int idx, i; + + ftrace_skel = ftrace_test__open_and_load(); + if (!ASSERT_OK_PTR(ftrace_skel, "ftrace_skel_load")) + goto cleanup; + + err = ftrace_test__attach(ftrace_skel); + if (!ASSERT_OK(err, "ftrace_attach")) + goto cleanup; + + prog_fd = bpf_program__fd(ftrace_skel->progs.test); + err = bpf_prog_test_run(prog_fd, 1, NULL, 0, + NULL, NULL, &retval, &duration); + ASSERT_OK(err || retval, "test_run"); + + ips = ftrace_skel->bss->ips; + idx = ftrace_skel->bss->idx; + + if (!ASSERT_EQ(idx, 8, "idx")) + goto cleanup; + + for (i = 0; i < 8; i++) { + unsigned long long addr; + char func[50]; + + snprintf(func, sizeof(func), "bpf_fentry_test%d", i + 1); + + err = kallsyms_find(func, &addr); + if (!ASSERT_OK(err, "kallsyms_find")) + goto cleanup; + + if (!ASSERT_EQ(ips[i], addr, "ips_addr")) + goto cleanup; + } + +cleanup: + ftrace_test__destroy(ftrace_skel); +} diff --git a/tools/testing/selftests/bpf/progs/ftrace_test.c b/tools/testing/selftests/bpf/progs/ftrace_test.c new file mode 100644 index 000000000000..b2a55aa10318 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/ftrace_test.c @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include + +char _license[] SEC("license") = "GPL"; + +__u64 ips[9] = { }; +unsigned int idx = 0; + +SEC("fentry.ftrace/bpf_fentry_test*") +int BPF_PROG(test, __u64 ip, __u64 parent_ip) +{ + if (idx >= 0 && idx < 8) + ips[idx++] = ip; + return 0; +} -- 2.30.2