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Mail Archives: cygwin-apps/2001/06/04/21:27:46

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Date: Tue, 5 Jun 2001 11:27:42 +1000 (EST)
From: =?iso-8859-1?q?Danny=20Smith?= <danny_r_smith_2001 AT yahoo DOT co DOT nz>
Subject: Fwd: [Patch] to ld/emultempl/pe.em; reduce default stacksize
To: cygwin-apps <cygwin-apps AT cygwin DOT com>
MIME-Version: 1.0

This patch has bee committed to MAIN

--- Danny Smith <danny_r_smith_2001 AT yahoo DOT co DOT nz> wrote: > Date: Tue, 5 Jun 2001
10:31:35 +1000 (EST)
> From: Danny Smith <danny_r_smith_2001 AT yahoo DOT co DOT nz>
> Subject: [Patch] to ld/emultempl/pe.em; reduce default stacksize
> To: DJ Delorie <dj AT delorie DOT com>
> CC: binutils AT sources DOT redhat DOT com
> 
> 
> --- DJ Delorie <dj AT delorie DOT com> wrote: > 
> > > Why is the default SizeOfStackReserve set to 0x02000000 in
> > ld/emultempl/pe.em?
> > 
> > GCC needs more than 1Mb of stack to compile itself.
> > 
> > Since the memory is virtual anyway, allocating a lot more than you
> > need doesn't hurt anything until you actually need it.
> > 
> > Plus, you're better off asking cygwin-specific questions on the cygwin
> > list, where all the cygwin experts live.
> 
> 
> I wasn't satisfied with the response I got last time.
> Setting the default stacksize reserve for pe targets to 32mb (0x2000000)
> still
> seems excessive.  This high setting can cause problems with multi-thread or
> multi-fiber apps, since each thread gets its own stack, with stack reserve
> and
> stack commit defaulting to sizes for main thread. A lot of code written for
> other win32 compilers expects the default stack-size to be of order of 1 mb,
> and so routinely use the default.
> 
> See thread in cygwin list archive starting here:
> http://sources.redhat.com/ml/cygwin/2001-06/msg00077.html
> 
> This patch reduces default stack reserve to 2mb (0x200000).  I have used ld
> built with this patch applied to successfully complete a three stage
> bootstrap
> of gcc-2.95.3 with mingw32 as host and target.
> 
> 
> ChangeLog
> 2001-06-05  Danny Smith  <danny_r_smith_2001 AT yahoo DOT co DOT nz>
> 
> 	* emultempl/pe.em (init[]): Reduce default stack reserve to 0x200000.
> 
> 
> --- pe.em.orig	Tue Apr 24 16:21:00 2001
> +++ pe.em	Tue Jun 05 10:37:34 2001
> @@ -252,7 +252,7 @@ static definfo init[] =
>  #endif
>    D(MinorSubsystemVersion,"__minor_subsystem_version__", 0),
>    D(Subsystem,"__subsystem__", ${SUBSYSTEM}),
> -  D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x2000000),
> +  D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x200000),
>    D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000),
>    D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000),
>    D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000),
> 
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