From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 2B0ED2D0C98 for ; Tue, 9 Jun 2026 10:43:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781001810; cv=none; b=nlPo5V+HD4xezBIE8cBInpHK1g8ejtKPM+WA3FCMWgTb4MXd+ykVpu3w/teGs0zkEmjTAVvoeLTEJEXcZjeQvwm+7mrpkatPwOTx55k7OdlOHREVKr9MDbnPr2HfcK3DOIX40KMsnvokSuArTlIxj4X90Mq9s2gUxf+7KUR1ueI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781001810; c=relaxed/simple; bh=purgn8u0Q1JdiFmU8kmpkR89xU+I+lCjdnWgdasJoFA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tGFRth9+f/XyBAnRy8qDMLsXqYIlbn7U9mOzk/E0MgaIT5uPiqxt80v4DicKsULLOnPnULV/qycsHE//bG2rIOsSekpWaz9kHYW6c17yiY4wswLt90ykvyC7bujgJG6iElizz1EYda9y0ugzlFsV1MKNsd7ScN7EMfRGwBmyuDc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MY2kLzkE; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="MY2kLzkE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1B8B11F00893; Tue, 9 Jun 2026 10:43:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781001808; bh=fEapK3MfSiztnYTiNm2M45mnByCVN7+w7yqH2/5S/0I=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MY2kLzkEYrnTXSfEbxPYBnjAM8ArGoAvT5kwqkoO5r1jgwhQCBiLLJlURzeQAQ39u DGmKjejA/5G6NWyH9V43GbhNhiqOrDsTAXtdZ1NApBQ6FMK0JeEOliF/hOxrHC9QPe +aEBRUeyzA7N0oMQYfN0G7JD42/v7IKz18F8p8jHBsSMJVkaImDjiywNz1yyNz7Bx2 j66UyLz2cOVI0df/ev5i7JfgJGN/gOErywjjfQU9KyZsDvCC5jKauHw3d7utP2EGnx kHHluUh/o6AePHtw1yuwVdPMFZFEIh8JZMkF6a3M+EIxXHR/ieC3Rqah/K/BYlZ6Eg fM3vRSsVjLw0Q== From: Jiri Olsa To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: bpf@vger.kernel.org, Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , Oleg Nesterov , Masami Hiramatsu Subject: [PATCH bpf-next 4/6] selftests/bpf: Add uprobe_multi path_fd test Date: Tue, 9 Jun 2026 12:42:42 +0200 Message-ID: <20260609104244.588321-5-jolsa@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260609104244.588321-1-jolsa@kernel.org> References: <20260609104244.588321-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add a uprobe_multi link API selftest that opens /proc/self/exe and passes the resulting descriptor through opts.uprobe_multi.path_fd with BPF_F_UPROBE_MULTI_PATH_FD set. Assisted-by: Codex:GPT-5.4 Signed-off-by: Jiri Olsa --- .../bpf/prog_tests/uprobe_multi_test.c | 62 +++++++++++++++++++ 1 file changed, 62 insertions(+) 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 56cbea280fbd..8c9eba1d4084 100644 --- a/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c +++ b/tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c @@ -2,6 +2,7 @@ #include #include +#include #include #include "uprobe_multi.skel.h" #include "uprobe_multi_bench.skel.h" @@ -757,6 +758,65 @@ static void test_link_api(void) __test_link_api(&child); } +static void test_link_api_path_fd(void) +{ + const char *resolve_path = "/proc/self/exe"; + LIBBPF_OPTS(bpf_link_create_opts, opts); + int prog_fd, link_fd = -1, path_fd = -1; + struct uprobe_multi *skel = NULL; + unsigned long *offsets = NULL; + const char *syms[3] = { + "uprobe_multi_func_1", + "uprobe_multi_func_2", + "uprobe_multi_func_3", + }; + int err; + + err = elf_resolve_syms_offsets(resolve_path, ARRAY_SIZE(syms), syms, + &offsets, STT_FUNC); + if (!ASSERT_OK(err, "elf_resolve_syms_offsets")) + return; + + path_fd = open(resolve_path, O_RDONLY); + if (!ASSERT_GE(path_fd, 0, "path_fd")) + goto cleanup; + + opts.uprobe_multi.path_fd = path_fd; + opts.uprobe_multi.offsets = offsets; + opts.uprobe_multi.cnt = ARRAY_SIZE(syms); + opts.uprobe_multi.flags = BPF_F_UPROBE_MULTI_PATH_FD; + + skel = uprobe_multi__open_and_load(); + if (!ASSERT_OK_PTR(skel, "uprobe_multi__open_and_load")) + goto cleanup; + + prog_fd = bpf_program__fd(skel->progs.uprobe); + link_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_UPROBE_MULTI, &opts); + if (!ASSERT_GE(link_fd, 0, "bpf_link_create")) + goto cleanup; + + skel->bss->uprobe_multi_func_1_addr = (__u64)uprobe_multi_func_1; + skel->bss->uprobe_multi_func_2_addr = (__u64)uprobe_multi_func_2; + skel->bss->uprobe_multi_func_3_addr = (__u64)uprobe_multi_func_3; + skel->bss->pid = getpid(); + + uprobe_multi_func_1(); + uprobe_multi_func_2(); + uprobe_multi_func_3(); + + ASSERT_EQ(skel->bss->uprobe_multi_func_1_result, 1, "uprobe_multi_func_1_result"); + ASSERT_EQ(skel->bss->uprobe_multi_func_2_result, 1, "uprobe_multi_func_2_result"); + ASSERT_EQ(skel->bss->uprobe_multi_func_3_result, 1, "uprobe_multi_func_3_result"); + +cleanup: + if (link_fd >= 0) + close(link_fd); + if (path_fd >= 0) + close(path_fd); + uprobe_multi__destroy(skel); + free(offsets); +} + static struct bpf_program * get_program(struct uprobe_multi_consumers *skel, int prog) { @@ -1354,6 +1414,8 @@ void test_uprobe_multi_test(void) test_attach_api_syms(); if (test__start_subtest("link_api")) test_link_api(); + if (test__start_subtest("link_api_path_fd")) + test_link_api_path_fd(); if (test__start_subtest("bench_uprobe")) test_bench_attach_uprobe(); if (test__start_subtest("bench_usdt")) -- 2.54.0