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Date: | Tue, 04 May 2010 19:50:19 +0100 |
From: | Dave Korn <dave DOT korn DOT cygwin AT googlemail DOT com> |
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To: | cygwin AT cygwin DOT com |
Subject: | Re: 1.7.5-1: fork throw segfault with g++ 4.3.4 |
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On 27/04/2010 08:02, Tim Wilson-Brown wrote: > Hi, > > I have identified a reproducible segfault when throwing exceptions in the > thrift IPC library under cygwin 1.7.5-1. Thanks for the simple testcase :) I have debugged what is happening, and it appears that the typeinfo for the stringexcept class is getting corrupted in the child process, apparently because a pseudo-reloc is being applied twice. I will debug this further shortly and figure out a fix; it also appears that the problem will be masked in the upcoming gcc-4.5.0 release (as a side-effect of the fact that the new libstdc++ dll will export typeinfos directly, rather than leaving them as static objects in the libstdc++ import library as is the practice in the 4.3.4 release; this avoids needing a pseudo-reloc, apparently, but the bug would presumably still turn up in other circumstances.) cheers, DaveK -- 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
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