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From: aznagar@web.de To: gcc-gnats@gcc.gnu.org Subject: c++/6787: seg fault when loading dynamic library that contains dynamic_cast Date: Thu, 23 May 2002 12:26:00 -0000 [thread overview] Message-ID: <20020523191723.14087.qmail@sources.redhat.com> (raw) >Number: 6787 >Category: c++ >Synopsis: seg fault when loading dynamic library that contains dynamic_cast >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Thu May 23 12:26:01 PDT 2002 >Closed-Date: >Last-Modified: >Originator: Dirk Walther >Release: 3.1 and 2.96 >Organization: >Environment: RedHat linux 7.1 on a i686 >Description: A dynamic library loader that has been compiled with g++-2.96 crashes with a segmentation fault when loading a dynamic library that has been compiled with g++-3.1 and that contains dynamic_cast. The problem does not occur when the library loader is compiled using g++-3.1 - in this case it loads and executes libraries compiled with g++-2.96 or g++-3.1 just fine. Also, the problem does not occur when both library loader and library are compiled with g++-2.96. I have attached the code for simple examples for the library loader, the library, and a log of a debug attempt. In real life, the library loader is Matlab (compiled with g++-2.95.2) which I cannot recompile. The library is a MEX function that needs to use g++-3.x >How-To-Repeat: Use the code and the compiler flags as mentioned in the attached file. >Fix: The library loader should be recompiled using g++-3.x. Unfortunately, this is not possible for me with Matlab. >Release-Note: >Audit-Trail: >Unformatted: ----gnatsweb-attachment---- Content-Type: application/octet-stream; name="bug_report" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="bug_report" LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0KQSBsb2cgb2YgYSBjb21waWxlIGFuZCBkZWJ1ZzoKLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLQolIGcrKy0yLjk2IC1vIGR5bmxkIGR5bmxkLmMgLWxkbAolIGcrKy0zLjEg LXNoYXJlZCBteWh3LmMgLW8gbXlody5zbwolIGdkYiAuL2R5bmxkCkdOVSBnZGIgNS4wcmgtNSBS ZWQgSGF0IExpbnV4IDcuMQpDb3B5cmlnaHQgMjAwMSBGcmVlIFNvZnR3YXJlIEZvdW5kYXRpb24s IEluYy4KR0RCIGlzIGZyZWUgc29mdHdhcmUsIGNvdmVyZWQgYnkgdGhlIEdOVSBHZW5lcmFsIFB1 YmxpYyBMaWNlbnNlLCBhbmQgeW91IGFyZQp3ZWxjb21lIHRvIGNoYW5nZSBpdCBhbmQvb3IgZGlz dHJpYnV0ZSBjb3BpZXMgb2YgaXQgdW5kZXIgY2VydGFpbiBjb25kaXRpb25zLgpUeXBlICJzaG93 IGNvcHlpbmciIHRvIHNlZSB0aGUgY29uZGl0aW9ucy4KVGhlcmUgaXMgYWJzb2x1dGVseSBubyB3 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next reply other threads:[~2002-05-23 19:26 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-05-23 12:26 aznagar [this message] 2002-09-15 4:34 nathan 2003-02-23 20:37 neroden
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