From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9274 invoked by alias); 29 Oct 2019 15:31:09 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 9217 invoked by uid 89); 29 Oct 2019 15:31:03 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-6.9 required=5.0 tests=BAYES_00,GIT_PATCH_2,RCVD_IN_DNSWL_NONE,SPF_HELO_PASS,SPF_PASS autolearn=ham version=3.3.1 spammy= X-HELO: NAM02-SN1-obe.outbound.protection.outlook.com Received: from mail-eopbgr770102.outbound.protection.outlook.com (HELO NAM02-SN1-obe.outbound.protection.outlook.com) (40.107.77.102) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Tue, 29 Oct 2019 15:30:59 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=GlVOp9RaxN1m74j+mO4nlQk5OW/nzDQOInlx3Xuhno+9f0ptEDIVms2RGPeERLKcNm05mHFHte4W+CQZItoDMUi6vaH5OYMeInYDhfeilETeRj0pPCVyvCJoNnt/fbfld8VpoScL6llMsm/ahft1iSYVVV29bmw8OaOFXSUqsr2G9WrUR5a46x155v5v6urzVv5l2r4WRcwGOyWfVigATrgHRu0T1CF3OAMuRqeFT44Pbvdvy+Gbw0FvOwpbL4egGPUSJ48MKUHfBovQQziezSqEhRAz0FAinXkszYFgRQ4VwJu6DqcJTQRGKzMxAZzgSdGw+ht0lYHK9TdW94iVEA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=fV8wsJe82w4Ak8xZS2I9N21bjFtJtcAL2d/n64jbXb4=; b=dPU9vO+aM1Cgan+1C8L293Hs97X0HJ/LgjLl4Wz198Iz2+5yEzzoPneQRssXESYbKrtfnyr3trzZuiVAEBNwN1MffBmdoJ7sQxPRmgz4gbGnzabsRaiNRDompP61xIGoY3NYJzNWEkko/Qg1zCXfNluE2epxVNo1achvsV0x7oD6K+8zMOmqyLwIas6ag3N/w4BrQxzu9wz/aFaMmP/tXg8g7D/s0y5gYg8+WCWjQBv8cN9a7bGH6TdRDoLk2TrZ5t3d96GgXQxKApQDZIRRPdu4mPw1bIaxmuIc1UD+W5Zx6kXpHzmM7qf6d3NoEwXaYXKV7dO1Yv724II4suaLDg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=cornell.edu; dmarc=pass action=none header.from=cornell.edu; dkim=pass header.d=cornell.edu; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cornell.edu; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=fV8wsJe82w4Ak8xZS2I9N21bjFtJtcAL2d/n64jbXb4=; b=XzgD/smnJlVrUJAxgK/GDXNdWcE6ilFb1etxfbC3M8rZRvAeeGR7OaMbR/2yJ5TVguMD6JH7XqTjIuf46kxD32ZSkhtzrqRPPDBcrko5FSDcDxBUvjFfv9lZp13KC58mebAuXNJ6MNyEnjgbEAN+313r35eeSMSzz9BGl6/t/5w= Received: from DM6PR04MB5738.namprd04.prod.outlook.com (20.179.51.81) by DM6PR04MB5451.namprd04.prod.outlook.com (20.178.27.148) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2387.24; Tue, 29 Oct 2019 15:30:57 +0000 Received: from DM6PR04MB5738.namprd04.prod.outlook.com ([fe80::d589:29c7:67ac:164c]) by DM6PR04MB5738.namprd04.prod.outlook.com ([fe80::d589:29c7:67ac:164c%5]) with mapi id 15.20.2408.016; Tue, 29 Oct 2019 15:30:57 +0000 From: Ken Brown To: "cygwin@cygwin.com" Subject: Re: program exit code, "at exit" handler and explicit close of shared objects Date: Tue, 29 Oct 2019 15:31:00 -0000 Message-ID: <1805e95e-6733-7a73-56fe-8493389ae367@cornell.edu> References: <20754eea-2b5e-dbbb-6027-2643be062e41@cornell.edu> In-Reply-To: <20754eea-2b5e-dbbb-6027-2643be062e41@cornell.edu> user-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 authentication-results: spf=none (sender IP is ) smtp.mailfrom=kbrown@cornell.edu; x-ms-exchange-purlcount: 4 x-ms-oob-tlc-oobclassifiers: OLM:5236; received-spf: None (protection.outlook.com: cornell.edu does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-ms-exchange-transport-forked: True Content-Type: text/plain; charset="Windows-1252" Content-ID: <5E4CBEBA51B807429F2E7CA3DAFB5432@namprd04.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: v8Z84lOlmR0Dcqw6mLLZNa1jljfcDGWV/NH01fl1qZ+HB+EdXL9a30EilKYE9uEJDqOCmLVUEF5J2kp/fIoLKg== X-IsSubscribed: yes X-SW-Source: 2019-10/txt/msg00191.txt.bz2 On 10/29/2019 10:53 AM, Ken Brown wrote: > On 10/26/2019 11:07 AM, Roumen Petrov wrote: >> >> After additional tests (research) I was able to isolate issues to simple= test >> case. Please find attached "test-dlclose.c" and "Makefile". >> First test is as is: >> >> $ make >> cc -g -Wall -Wextra=A0=A0=A0 test-dlclose.c=A0=A0 -o test-dlclose >> ./test-dlclose >> exit with code 33 >> make: [Makefile:4: all] Error 33 (ignored) >> >> For next test change test-dlclose.c to define DLCLOSE_ATEXIT ( s/#if 0/#= if 1/ ): >> $ make >> cc -g -Wall -Wextra=A0=A0=A0 test-dlclose.c=A0=A0 -o test-dlclose >> ./test-dlclose >> exit with code 33 >=20 > I ran this second version of test-dlclose (with DLCLOSE_ATEXIT defined) u= nder > strace and got the following: >=20 > $ strace -o trace.out ./test-dlclose.exe > exit with code 33 > Segmentation fault >=20 > The strace output ends with >=20 > 30 30143 [main] test-dlclose 847 write: 18 =3D write(1, 0x600061E2= 0, 18) > --- Process 33456 (pid: 847) unloaded DLL at 00000003e7930000 > --- Process 33456 (pid: 847), exception c0000005 at 00000003e7931080 > --- Process 33456 (pid: 847) thread 26088 exited with status 0xc0000005 > --- Process 33456 (pid: 847) thread 33544 exited with status 0xc0000005 > --- Process 33456 (pid: 847) thread 36020 exited with status 0xc0000005 > --- Process 33456 exited with status 0xc0000005 >=20 > The address 00000003e7930000 seems to be in /usr/bin/cygz.dll, which is t= he DLL Sorry, I meant to say 00000003e7931080; 00000003e7930000 is the start of cy= gz.dll. > that got unloaded. After installing zlib-debuginfo, I ran addr2line to s= ee > where the crash occurred, and this too crashed: >=20 > $ addr2line -C -f -i -p -e /usr/bin/cygz.dll 0x3e7931080 > Segmentation fault (core dumped) >=20 > That's as far as I've gotten. >=20 > Ken >=20 > -- > Problem reports: http://cygwin.com/problems.html > FAQ: http://cygwin.com/faq/ > Documentation: http://cygwin.com/docs.html > Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple >=20 -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple