From patchwork Thu Jan 20 23:59:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Malcolm X-Patchwork-Id: 50291 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 1EC713857810 for ; Thu, 20 Jan 2022 23:59:39 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1EC713857810 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1642723179; bh=h30ImKG9tBFp/5+PJB7hsEG4zGGw+by/u1ZW/WJFXnY=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=Gd07k+kyN/2HptHD0bV2sHRv+QIhP5DF8yD33hD/LlgTzqWuQYZFtUZtpbWvRaFxp RudrNXsrsxMekoZnNJH4Y5x4L/jaOicKYqgHBfEnXMMZdQRB7YrL6FSU9dYLdEw0qO snrgOYmfvWBrnIIsk0SDG0YAag84eowx7AxN6IL8= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 603273858407 for ; Thu, 20 Jan 2022 23:59:09 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 603273858407 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-414-K2YzD6kMPvCkJOsNFakNWw-1; Thu, 20 Jan 2022 18:59:07 -0500 X-MC-Unique: K2YzD6kMPvCkJOsNFakNWw-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id EB5A21006AA6 for ; Thu, 20 Jan 2022 23:59:06 +0000 (UTC) Received: from t14s.localdomain.com (unknown [10.2.16.154]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8248A6ABA2; Thu, 20 Jan 2022 23:59:02 +0000 (UTC) To: gcc-patches@gcc.gnu.org Subject: [committed] analyzer: add regression test [PR103685] Date: Thu, 20 Jan 2022 18:59:00 -0500 Message-Id: <20220120235900.2353779-1-dmalcolm@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-13.3 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: David Malcolm via Gcc-patches From: David Malcolm Reply-To: David Malcolm Errors-To: gcc-patches-bounces+patchwork=sourceware.org@gcc.gnu.org Sender: "Gcc-patches" PR analyzer/103685 reports a false positive from -Wanalyzer-null-dereference seen at -O2 with GCC 11. I can reproduce it with GCC 11, but not with trunk; this patch adds a reduced test case that reproduces it with GCC 11 as a regression test for GCC 12 onwards. Successfully regrtested on x86_64-pc-linux-gnu. Pushed to trunk as r12-6781-gf5a9d76be849b4cf20b1b687febc34a937381dc3. gcc/testsuite/ChangeLog: PR analyzer/103685 * gcc.dg/analyzer/torture/pr103685.c: New test. Signed-off-by: David Malcolm --- .../gcc.dg/analyzer/torture/pr103685.c | 33 +++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/analyzer/torture/pr103685.c diff --git a/gcc/testsuite/gcc.dg/analyzer/torture/pr103685.c b/gcc/testsuite/gcc.dg/analyzer/torture/pr103685.c new file mode 100644 index 00000000000..1b222487417 --- /dev/null +++ b/gcc/testsuite/gcc.dg/analyzer/torture/pr103685.c @@ -0,0 +1,33 @@ +typedef struct ec_key_st EC_KEY; +typedef struct ec_group_st EC_GROUP; +typedef struct R3410_ec { + int nid; + EC_GROUP *group; +} R3410_ec_params; +extern R3410_ec_params R3410_2012_512_paramset[]; + +static R3410_ec_params *gost_nid2params(int nid) { + R3410_ec_params *params; + + params = R3410_2012_512_paramset; + while (params->nid != 0) { + if (params->nid == nid) + return params; + params++; + } + + return ((void *)0); +} + +int fill_GOST_EC_params(EC_KEY *eckey, int nid) { + R3410_ec_params *params = gost_nid2params(nid); + if (!eckey || !params) { + return 0; + } + + if (params->group) { + return 1; + } + + return 0; +}