From patchwork Mon Sep 9 07:45:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiri Olsa X-Patchwork-Id: 13796238 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 76A241B143D; Mon, 9 Sep 2024 07:47:11 +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=1725868031; cv=none; b=MN5cpjlSGvOKNfjsJAVXyhYzBSknSX5fEZp0622T9O8bOb9p36781mAaUkqLDYMonV4XPTRd5sfV49SmTOfTNQNaAUefrlqTaAPvgmNnnaTBmwZnzRC2Gj1qc2FaM177Mk/F3iYEziSL+HExSI6ThnxVw7ZdiGCJFcSOsLcKWMM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725868031; c=relaxed/simple; bh=RU1guL+oeamaHcos0dxdcHWw1bg8Cmx/4IIKvNEPfcM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pk2D2His+qvzQgFmJt5/NPkPqUJd8f98heY/HIBlTeE5JH6UVIBuxCeQzwkbrnEmEgt6/7pA5Brl7gcjGlM5AoQHtKYYdNaLrej8BaCJGOYLlnskffrRcqOQIFfUO30ESVq719VDwEdkniPV4zkJauSxLUadQnExRIavoQx+CAA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=upgC1/tM; 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="upgC1/tM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0418AC4CEC5; Mon, 9 Sep 2024 07:47:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725868031; bh=RU1guL+oeamaHcos0dxdcHWw1bg8Cmx/4IIKvNEPfcM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=upgC1/tM4mfKa9ONxXNoEkLId4JVdQBgYAJkjL0vb9v5IJoEIpT/jCD4T8c2rdcbu vglugM+Feiv+25YaC2YUdTFNMc+TXQm71eMYVp77fgU+4WOEktCarEZ4YrHzK45U2n fE2An136niRsX7jnQ6wFNmfh0aCqDsUyQbG38CyCX5RVPhaas3wiu2eH1pyE7yNR/F HM+DUIn8IiZjrfYA2X65CZVJysYhKS36t62R/EnPRMTjsAMIzMGhq2FEg+qTkopz2x ugJhXzojZH0AbC5iUs7/u3MJNasKXWTooLPeDSixcv034RB4taCCWbfDPsVVuLg2sW QR28iSsY9WUrA== 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: [PATCHv3 6/7] selftests/bpf: Add uprobe session cookie test Date: Mon, 9 Sep 2024 09:45:53 +0200 Message-ID: <20240909074554.2339984-7-jolsa@kernel.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240909074554.2339984-1-jolsa@kernel.org> References: <20240909074554.2339984-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Adding uprobe session test that verifies the cookie value get properly propagated from entry to return program. Acked-by: Andrii Nakryiko Signed-off-by: Jiri Olsa --- .../bpf/prog_tests/uprobe_multi_test.c | 31 ++++++++++++ .../bpf/progs/uprobe_multi_session_cookie.c | 48 +++++++++++++++++++ 2 files changed, 79 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/uprobe_multi_session_cookie.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 cc32288bfe26..8f56066a0195 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_cookie.skel.h" #include "bpf/libbpf_internal.h" #include "testing_helpers.h" #include "../sdt.h" @@ -660,6 +661,34 @@ static void test_session_skel_api(void) uprobe_multi_session__destroy(skel); } +static void test_session_cookie_skel_api(void) +{ + struct uprobe_multi_session_cookie *skel = NULL; + int err; + + skel = uprobe_multi_session_cookie__open_and_load(); + if (!ASSERT_OK_PTR(skel, "uprobe_multi_session_cookie__open_and_load")) + goto cleanup; + + skel->bss->pid = getpid(); + + err = uprobe_multi_session_cookie__attach(skel); + if (!ASSERT_OK(err, "uprobe_multi_session_cookie__attach")) + goto cleanup; + + /* trigger all probes */ + uprobe_multi_func_1(); + uprobe_multi_func_2(); + uprobe_multi_func_3(); + + ASSERT_EQ(skel->bss->test_uprobe_1_result, 1, "test_uprobe_1_result"); + ASSERT_EQ(skel->bss->test_uprobe_2_result, 2, "test_uprobe_2_result"); + ASSERT_EQ(skel->bss->test_uprobe_3_result, 3, "test_uprobe_3_result"); + +cleanup: + uprobe_multi_session_cookie__destroy(skel); +} + static void test_bench_attach_uprobe(void) { long attach_start_ns = 0, attach_end_ns = 0; @@ -750,4 +779,6 @@ void test_uprobe_multi_test(void) test_attach_api_fails(); if (test__start_subtest("session")) test_session_skel_api(); + if (test__start_subtest("session_cookie")) + test_session_cookie_skel_api(); } diff --git a/tools/testing/selftests/bpf/progs/uprobe_multi_session_cookie.c b/tools/testing/selftests/bpf/progs/uprobe_multi_session_cookie.c new file mode 100644 index 000000000000..5befdf944dc6 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/uprobe_multi_session_cookie.c @@ -0,0 +1,48 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include "bpf_kfuncs.h" + +char _license[] SEC("license") = "GPL"; + +int pid = 0; + +__u64 test_uprobe_1_result = 0; +__u64 test_uprobe_2_result = 0; +__u64 test_uprobe_3_result = 0; + +static int check_cookie(__u64 val, __u64 *result) +{ + __u64 *cookie; + + if (bpf_get_current_pid_tgid() >> 32 != pid) + return 1; + + cookie = bpf_session_cookie(); + + if (bpf_session_is_return()) + *result = *cookie == val ? val : 0; + else + *cookie = val; + return 0; +} + +SEC("uprobe.session//proc/self/exe:uprobe_multi_func_1") +int uprobe_1(struct pt_regs *ctx) +{ + return check_cookie(1, &test_uprobe_1_result); +} + +SEC("uprobe.session//proc/self/exe:uprobe_multi_func_2") +int uprobe_2(struct pt_regs *ctx) +{ + return check_cookie(2, &test_uprobe_2_result); +} + +SEC("uprobe.session//proc/self/exe:uprobe_multi_func_3") +int uprobe_3(struct pt_regs *ctx) +{ + return check_cookie(3, &test_uprobe_3_result); +}