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Date: Tue, 27 Nov 2018 14:13:06 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: GCC: Precompiled headers - Segmentation fault
Message-ID: <20181127131306.GS30649@calimero.vinschen.de>
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On Nov 27 11:32, Ji=C5=99=C3=AD Engelthaler wrote:
> Hi,
>   I have a problem with GCC 7.3.0 (problem is in all versions) and
> precompiled headers.
> I have the sample file http://ge.tt/7fRLk1t2 which causes Segmentation
> fault in cc1.
> The test passes normally on Linux. I searched why and found that the resu=
lt
> here
> https://github.com/gcc-mirror/gcc/blob/gcc-7_3_0-release/gcc/ggc-common.c=
#L626
> is 1 in Linux and -1 in CygWin.
>=20
> In Linux the method called is
> https://github.com/gcc-mirror/gcc/blob/gcc-7_3_0-release/gcc/config/host-=
linux.c#L182
>=20
> In Cygwin the method called is
> https://github.com/gcc-mirror/gcc/blob/gcc-7_3_0-release/gcc/ggc-common.c=
#L708
> - mmap return address is not equal to base address.

   This version assumes that the kernel honors the START operand of mmap
   even without MAP_FIXED if START through START+SIZE are not currently
   mapped with something.

Sigh.


Corinna

--=20
Corinna Vinschen
Cygwin Maintainer

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