From patchwork Mon Apr 16 14:12:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luc Van Oostenryck X-Patchwork-Id: 10343023 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4314D601D7 for ; Mon, 16 Apr 2018 14:12:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 34C85206AC for ; Mon, 16 Apr 2018 14:12:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 27691223A7; Mon, 16 Apr 2018 14:12:44 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1256C206AC for ; Mon, 16 Apr 2018 14:12:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751107AbeDPOMm (ORCPT ); Mon, 16 Apr 2018 10:12:42 -0400 Received: from mail-wr0-f194.google.com ([209.85.128.194]:33303 "EHLO mail-wr0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751024AbeDPOMm (ORCPT ); Mon, 16 Apr 2018 10:12:42 -0400 Received: by mail-wr0-f194.google.com with SMTP id z73so26481354wrb.0 for ; Mon, 16 Apr 2018 07:12:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=si4csA71y5aCC9gloDYGAI3GppummmRLJvrr95vCpkI=; b=bxYwpB3CYwlI83b6+PEjiu+FPc2nCgDGg04P0jOOANwdWgtyTJpR1kvBML9V8XgyBv YREAjFS/V6/S3Vk5fNrKjGTZ7DtBG835DFB68AYO9emXIiFz77DgKXupgZwjMBG867G+ qUBRNV+kZhJhHPU4GfdyAE3S2aqXmFeNevFXGLgD/+dWLh/Qux2v5XZU04FAI6yJAYUn NkLECW+XOVJ0h8EwNKZy8VAHJnBgpbBC7yjgAwUwf2GI9IFV8/6VDwh6eR+ZGWwoDYMH WgGTARYgBecviiA2GAY5MsKZFdpGwty3xG73d+21mYgY3Rgidhrot76WJHhAofHacqbU /WVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=si4csA71y5aCC9gloDYGAI3GppummmRLJvrr95vCpkI=; b=ZVR9Sn0b4sym03h/KNJI4/LXtE13GfRORxcT7nBo0gp+RWCpZu5jbK7HpnDkAFr4mi Y+9NKwKmKygNEJvoZzldsf8egNj3AHSkr1HS/f1BoWUQMTPynIiUfRsdVpGru0Kmrt3T dpz/X/K6uzV1tYNHEL9/V4+KQw8bkQmm3+hFI2gMQY4kLJbfP1OClZ5vMAskA0xPaKwq 4Q3RscnTax4zBQ0/9NzVaa/cU/aL28PV6S7Q8ZPJyI+qPs1dj72qUynqYP5bQdzPGOnN BLSY5zW2Igw2ipisap9OSkEx6qDv6oLWCTZsOMpbQW+iEJHQWnA3c1y5fGBIAzpZ61Pd rvPw== X-Gm-Message-State: ALQs6tDnmIVXwq482t2kz4YCZLY2GL3IFA3LVImn1XH+OIHFgxgnJa2C fLRTtpSe7HJGT5HHrm35ATX1EZLz X-Google-Smtp-Source: AIpwx485FCH9bUjLPmgPSZfUE1BxFZd0p7Oseirk78K4Gqlf4lfFiJVyXIRWLlKSmIBpZG4KkeEZcw== X-Received: by 10.80.192.79 with SMTP id u15mr6153494edd.16.1523887960748; Mon, 16 Apr 2018 07:12:40 -0700 (PDT) Received: from localhost.localdomain ([2a02:a03f:4028:3a00:64fc:ea13:f95b:61eb]) by smtp.gmail.com with ESMTPSA id e56sm7410645edb.84.2018.04.16.07.12.39 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 16 Apr 2018 07:12:39 -0700 (PDT) From: Luc Van Oostenryck To: linux-sparse@vger.kernel.org Cc: Luc Van Oostenryck Subject: [PATCH] add testcases for packed bitfields Date: Mon, 16 Apr 2018 16:12:34 +0200 Message-Id: <20180416141234.77051-1-luc.vanoostenryck@gmail.com> X-Mailer: git-send-email 2.16.3 Sender: linux-sparse-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sparse@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Currently sparse ignore type attributes, like for example, defining a packed structure. Add a testcase for this. Signed-off-by: Luc Van Oostenryck --- validation/packed-bitfield.c | 65 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 validation/packed-bitfield.c diff --git a/validation/packed-bitfield.c b/validation/packed-bitfield.c new file mode 100644 index 000000000..914b7f86a --- /dev/null +++ b/validation/packed-bitfield.c @@ -0,0 +1,65 @@ +#define alignof(X) __alignof__(X) +#define __packed __attribute__((packed)) + +struct sa { + int a:7; + int c:10; + int b:2; +} __packed; +_Static_assert(alignof(struct sa) == 1, "alignof(struct sa)"); + +struct __packed sb { + int a:7; + int c:10; + int b:2; +}; +_Static_assert(alignof(struct sb) == 1, "alignof(struct sb)"); + +static int get_size(void) +{ + return sizeof(struct sa); +} + +static void chk_align(struct sa sa, struct sa *p) +{ + _Static_assert(__alignof__(sa) == 1, "alignof(sa)"); + _Static_assert(__alignof__(*p) == 1, "alignof(*p)"); +} + +static int fp0(struct sa *sa) +{ + return sa->c; +} + +static int fpx(struct sa *sa, int idx) +{ + return sa[idx].c; +} + +static int fglobal(void) +{ + extern struct sa g; + return g.c; +} + +static struct sa l; +static int flocal(void) +{ + return l.c; +} + + +int main(void) +{ + extern void fun(struct sa *); + struct sa sa = { 0 }; + + fun(&sa); + return 0; +} + +/* + * check-name: packed-bitfield + * check-command: sparse -m32 $file + * check-known-to-fail + */