From patchwork Sun Sep 29 20:57:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiri Olsa X-Patchwork-Id: 13815250 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 0126F175D32; Sun, 29 Sep 2024 20:59:48 +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=1727643589; cv=none; b=Dcl+dvOkaX9aa8i01tB2wSw+InWTpWtRbn2B8ZgxAQVWR0hU++C8PPh2oOKd92zG0naKYXkNsDUple2M6ECfVOLWPScY0Y/Pg8biEmX7Z3J8ehzCUQsGB/UVZfWbnSz0qL4wFC3rwVi6S1EhFNxUGle4MrYBu/qM8fDhKwPXsJs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727643589; c=relaxed/simple; bh=GxXbTFmwtFnji9jVDyodCe68CuD8wpBEa6bjFb/hzu0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qdfNMJ1YCbyZhS3PSL262V7FBDAvxZk4vk467FOj5aqbvVDMxiXm2b/+npOsC1kBvz3TuNwAndDUqMe6NTGaxta2yZGzQKd/p09KGSCFWz/A/TXNlRy0ydrYZm2JZjH74sdWf9uCuz5r2V08V2GDcMvrDUVRZ2Y9/HqCfkBVmkY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=O796d0Pl; 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="O796d0Pl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 52416C4CEC5; Sun, 29 Sep 2024 20:59:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727643588; bh=GxXbTFmwtFnji9jVDyodCe68CuD8wpBEa6bjFb/hzu0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=O796d0PlfQ58k7M/MZmstcbLoJUWLuR+Eaqupi/L2w+cERrq0dFVPhI0UQKlhUJ3O O/hVunCTDSN3Nmgz6XBjMyALDuGQx6knEUboYSnLURvsN2t8fOSNSHhRTrQXs/mg30 gDu1CYMnX9cMz487iEEsI8j5scRONJIYSxD+AwtXQWdhFEApXkNySl5I7RL5pI91Am aagU7t8Xq5ZM1EFbVcTrnoBbhypjBHDdGxytYpp6Nwkau8dJbTv7bXTyxlZGpRi7Ho B5L2Sm9btw7c4fV9bsWn8ZXkLjpqlhp/ZQ0sRvPDKBFVgxcfep32PAAcVC8zbppfy3 ks2UiOsJOS5TQ== 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: [PATCHv5 bpf-next 12/13] selftests/bpf: Add uprobe session single consumer test Date: Sun, 29 Sep 2024 22:57:16 +0200 Message-ID: <20240929205717.3813648-13-jolsa@kernel.org> X-Mailer: git-send-email 2.46.1 In-Reply-To: <20240929205717.3813648-1-jolsa@kernel.org> References: <20240929205717.3813648-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 e693eeb1a5a5..7e0228f8fcfc 100644 --- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c +++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c @@ -9,6 +9,7 @@ #include "uprobe_multi_consumers.skel.h" #include "uprobe_multi_pid_filter.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" @@ -1069,6 +1070,36 @@ 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; @@ -1243,6 +1274,8 @@ void test_uprobe_multi_test(void) test_pid_filter_process(true); 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); +}