From nobody Sun Feb 8 22:50:42 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; envelope-from=libvir-list-bounces@redhat.com; helo=mx1.redhat.com; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; dmarc=pass(p=none dis=none) header.from=redhat.com Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mx.zohomail.com with SMTPS id 1551261922925943.387559107846; Wed, 27 Feb 2019 02:05:22 -0800 (PST) Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 52C8E306111D; Wed, 27 Feb 2019 10:05:21 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 26B5C5DA9A; Wed, 27 Feb 2019 10:05:21 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id CF66C181A00B; Wed, 27 Feb 2019 10:05:20 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id x1RA58UG032233 for ; Wed, 27 Feb 2019 05:05:08 -0500 Received: by smtp.corp.redhat.com (Postfix) id 58B9D1001DD6; Wed, 27 Feb 2019 10:05:08 +0000 (UTC) Received: from moe.brq.redhat.com (unknown [10.43.2.30]) by smtp.corp.redhat.com (Postfix) with ESMTP id A5E6C1001DC6; Wed, 27 Feb 2019 10:05:07 +0000 (UTC) From: Michal Privoznik To: libvir-list@redhat.com Date: Wed, 27 Feb 2019 11:04:33 +0100 Message-Id: <92f666689621af798328e7edfa2105b7ea4ab6ff.1551261217.git.mprivozn@redhat.com> In-Reply-To: References: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-loop: libvir-list@redhat.com Cc: lersek@redhat.com Subject: [libvirt] [PATCH v1 01/15] virmock: Initialize both symbols in VIR_MOCK_REAL_INIT_ALT X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.48]); Wed, 27 Feb 2019 10:05:21 +0000 (UTC) Content-Type: text/plain; charset="utf-8" It may happen that both symbols are present. Especially when chaining mocks. For instance if a test is using virpcimock and then both stat and __xstat would be present in the address space as virpcimock implements both. Then, if the test would try to use say virfilewrapper (which again uses VIR_MOCK_REAL_INIT_ALT() to init real_stat and real___xstat) it would find stat() from virpcimock and stop there. The virfilewrapper.c:real___xstat wouldn't be initialized and thus it may result in a segfault. The reason for segfault is that sys/stat.h may redefine stat() to call __xstat(). Signed-off-by: Michal Privoznik --- tests/virmock.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/tests/virmock.h b/tests/virmock.h index 853dbb8be2..9c7ecf60ce 100644 --- a/tests/virmock.h +++ b/tests/virmock.h @@ -292,8 +292,9 @@ =20 # define VIR_MOCK_REAL_INIT_ALT(name1, name2) \ do { \ - if (!(real_ ## name1 =3D dlsym(RTLD_NEXT, #name1)) && \ - !(real_ ## name2 =3D dlsym(RTLD_NEXT, #name2))) { \ + real_ ## name1 =3D dlsym(RTLD_NEXT, #name1); \ + real_ ## name2 =3D dlsym(RTLD_NEXT, #name2); \ + if (!real_##name1 && !real_##name2) { \ fprintf(stderr, "Cannot find real '%s' or '%s' symbol\n", \ #name1, #name2); \ abort(); \ --=20 2.19.2 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list