From patchwork Tue Sep 17 08:50:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiri Olsa X-Patchwork-Id: 13805982 X-Patchwork-Delegate: bpf@iogearbox.net Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CC36415B561; Tue, 17 Sep 2024 08:53:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726563190; cv=none; b=KtWSWtgo9f8TNke/+583m+aaUy5ws72aSdIkjNxPTKl5jwm3JhY5kG3Ym126PdqYFhu0K0idWl2KOr6Q9unJub0E+qPy9G4/ZjooZLkpxMZ0Odh/OHvjCjOhFZbglvRkDkt8BqMgxpMu6bH90yzm9TaGudlqGWtoKV1rClSQzUY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726563190; c=relaxed/simple; bh=ShXB489+gH5xzNqGVywABGETB3D2nsBgIplRythHk90=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JzNEQVUvyzYA5V9uum1qKOASVyq5Ip7NUbw1kvipCd9XOx9zNLrydCNX5QUFiDlg7iXGbaMs5w12epHvi2B4LPcEIMF7wdQvx6Fz+41YGkdfFpYh1zJMvWO5RGbdJJmjK4lE7HvD8WKWEWZ/s/ctBY68HS6mhGomq7VBcmu3zpU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PmEa9k5f; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PmEa9k5f" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 394B0C4CEC5; Tue, 17 Sep 2024 08:53:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1726563190; bh=ShXB489+gH5xzNqGVywABGETB3D2nsBgIplRythHk90=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PmEa9k5fuW96PPW4IIaDFygX4DTRCbo16wBnKl84PD3kdVGkf4agtbZuPD1BIDkgk uDU9L5XoenaE+taNxmR8MqZrqwiDY8acguAJLsl7OaYgrNMuaCwuDyjVy5J3YTxuY9 VDV6okRnIMYVjYoJFcrHd5sOg9MHAvsUxucQt7MRsA6fITUKA7reE+4SweYJnwrUNW OZL0cH8lH1cKWCYWL9WrmDJ2nh/v9ZzamWgQo9paTpHOJi4HCmKOe0xbfWB2w2EbdP PQj+56dG1S4lDnl6uhFpsXGQTPOQ9mKdh+IjnZBuHmIQCqyj4drLDzdqPrnwX9tDWm qEl6AwMx7suOw== From: Jiri Olsa To: Oleg Nesterov , Peter Zijlstra , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: bpf@vger.kernel.org, Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Steven Rostedt , Masami Hiramatsu , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: [PATCHv4 13/14] selftests/bpf: Add uprobe session single consumer test Date: Tue, 17 Sep 2024 10:50:23 +0200 Message-ID: <20240917085024.765883-14-jolsa@kernel.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240917085024.765883-1-jolsa@kernel.org> References: <20240917085024.765883-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net Testing that the session ret_handler bypass works on single uprobe with multiple consumers, each with different session ignore return value. Signed-off-by: Jiri Olsa --- .../bpf/prog_tests/uprobe_multi_test.c | 33 ++++++++++++++ .../bpf/progs/uprobe_multi_session_single.c | 44 +++++++++++++++++++ 2 files changed, 77 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/uprobe_multi_session_single.c diff --git a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c index 210cdb620ee0..594aa8c06f58 100644 --- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c +++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c @@ -7,6 +7,7 @@ #include "uprobe_multi_bench.skel.h" #include "uprobe_multi_usdt.skel.h" #include "uprobe_multi_session.skel.h" +#include "uprobe_multi_session_single.skel.h" #include "uprobe_multi_session_cookie.skel.h" #include "uprobe_multi_session_recursive.skel.h" #include "uprobe_multi_verifier.skel.h" @@ -669,6 +670,36 @@ static void test_session_skel_api(void) uprobe_multi_session__destroy(skel); } +static void test_session_single_skel_api(void) +{ + struct uprobe_multi_session_single *skel = NULL; + LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); + int err; + + skel = uprobe_multi_session_single__open_and_load(); + if (!ASSERT_OK_PTR(skel, "uprobe_multi_session_single__open_and_load")) + goto cleanup; + + skel->bss->pid = getpid(); + + err = uprobe_multi_session_single__attach(skel); + if (!ASSERT_OK(err, "uprobe_multi_session_single__attach")) + goto cleanup; + + uprobe_multi_func_1(); + + /* + * We expect consumer 0 and 2 to trigger just entry handler (value 1) + * and consumer 1 to hit both (value 2). + */ + ASSERT_EQ(skel->bss->uprobe_session_result[0], 1, "uprobe_session_result_0"); + ASSERT_EQ(skel->bss->uprobe_session_result[1], 2, "uprobe_session_result_1"); + ASSERT_EQ(skel->bss->uprobe_session_result[2], 1, "uprobe_session_result_2"); + +cleanup: + uprobe_multi_session_single__destroy(skel); +} + static void test_session_cookie_skel_api(void) { struct uprobe_multi_session_cookie *skel = NULL; @@ -835,6 +866,8 @@ void test_uprobe_multi_test(void) test_attach_api_fails(); if (test__start_subtest("session")) test_session_skel_api(); + if (test__start_subtest("session_single")) + test_session_single_skel_api(); if (test__start_subtest("session_cookie")) test_session_cookie_skel_api(); if (test__start_subtest("session_cookie_recursive")) diff --git a/tools/testing/selftests/bpf/progs/uprobe_multi_session_single.c b/tools/testing/selftests/bpf/progs/uprobe_multi_session_single.c new file mode 100644 index 000000000000..1fa53d3785f6 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/uprobe_multi_session_single.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include "bpf_kfuncs.h" +#include "bpf_misc.h" + +char _license[] SEC("license") = "GPL"; + +__u64 uprobe_session_result[3] = {}; +int pid = 0; + +static int uprobe_multi_check(void *ctx, bool is_return, int idx) +{ + if (bpf_get_current_pid_tgid() >> 32 != pid) + return 1; + + uprobe_session_result[idx]++; + + /* only consumer 1 executes return probe */ + if (idx == 0 || idx == 2) + return 1; + + return 0; +} + +SEC("uprobe.session//proc/self/exe:uprobe_multi_func_1") +int uprobe_0(struct pt_regs *ctx) +{ + return uprobe_multi_check(ctx, bpf_session_is_return(), 0); +} + +SEC("uprobe.session//proc/self/exe:uprobe_multi_func_1") +int uprobe_1(struct pt_regs *ctx) +{ + return uprobe_multi_check(ctx, bpf_session_is_return(), 1); +} + +SEC("uprobe.session//proc/self/exe:uprobe_multi_func_1") +int uprobe_2(struct pt_regs *ctx) +{ + return uprobe_multi_check(ctx, bpf_session_is_return(), 2); +}