Segfault on Cygwin64 when parisizemax

Jeroen Demeyer on Fri, 13 May 2016 11:18:04 +0200

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Segfault on Cygwin64 when parisizemax > 4GB

To: pari-dev@pari.math.u-bordeaux.fr
Subject: Segfault on Cygwin64 when parisizemax > 4GB
From: Jeroen Demeyer <jdemeyer@cage.ugent.be>
Date: Fri, 13 May 2016 11:17:53 +0200
Delivery-date: Fri, 13 May 2016 11:18:04 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.7.0

Dear PARI developers,

While trying Sage on 64-bit Cygwin, we got a segfault in a cgetr() callduring Sage startup. It turns out that the bug is actually in the mmap()implementation of Cygwin and it happens whenever parisizemax is largerthan 4GB. The Cygwin bug is reported at

https://cygwin.com/ml/cygwin/2016-05/msg00140.html

Perhaps PARI should add a workaround for this bug, for example putting acap on parisizemax on Cygwin?



Cheers,
Jeroen.

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