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From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin-patches@cygwin.com
Subject: Re: RtlFillMemory fails on block sizes over 0x7fffffff
Date: Wed, 29 Jul 2015 16:21:00 -0000	[thread overview]
Message-ID: <20150729162135.GA20388@calimero.vinschen.de> (raw)
In-Reply-To: <3BD89E0BA5F96349B765DE1100906A6D016FC0267F@UKCH-PRD-EXMB01.illumina.com>

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On Jul 29 14:11, Petrovski, Roman wrote:
> Hi, just ran into a problem which boils down to the following at least with Windows 7:
> 
> char *p = (char*)malloc(0x80000000UL);	//works fine, allocates memory as requested
> memset(p, 0, 0x80000000UL);			//Watch process segfault.
> 
> The RtlFillMemory either crashes or underfills the buffer depending on the size given.
> Looks like internally it treats size as a signed 4-byte integer.
> 
> Please apply the patch below or implement an alternative.

Thanks for the patch, but I'll rather be looking into an assembler
alternative.  I'm planning to pull in the NetBSD implementation, with
the tweaks required for MS ABI.


Thanks,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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  reply	other threads:[~2015-07-29 16:21 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-29 14:10 Petrovski, Roman
2015-07-29 16:21 ` Corinna Vinschen [this message]
2015-07-29 16:28   ` Petrovski, Roman
2015-07-29 20:21     ` Corinna Vinschen

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