Re: CTs or Cygwins 'fault': fork: can't reserve memory for stack...

[Frederic Stark <f5426 at almonde dot com>]

Martin Egholm Nielsen wrote:

> > > I'm trying to link a huge bunch of crosscompiled .o files into a 
> > > main-file. However, I (suddenly) get the following fault message from 
> > > collect2.exe:
> > >
> > > C:\cygwin\opt\crosstool\powerpc-405-linux-gnu\gcc-3.4.0-glibc-2.2.5\libexec\gcc\powerpc-405-linux-gnu\3.4.0\collect2.exe 
> > > (1740): *** fork: can't reserve memory for stack 0x40000 - 0x240000, 
> > > Win32 error 487
> > >
> > > I was wondering if this was a Cygwin error or Crosstool issue?
>
>
> > I did not find a fix for that.  It only happened when
> > running lots of programs in parallel.  You should probably
> > take this problem to the cygwin mailing list.  It would
> > help if you could put together a minimal test case
> > (i.e. a shell script that reproduces the problem
> > with toy sources).
>
>
> Btw.: Andrew Haley (from RedHat) comments on my question on the GCJ IRC 
> channel:
>
> aph: There's some magic in Win32 to extend the size of a stack segment
> aph: I can't remember the command
> egholm: but you're right, the problem has first entered after adding 
> some more .o files
> aph: we had to do it with Win gcc cross compilers
>
> Hence, it seems that there is some solution somewhere out there (unless 
> he remembers wrong ["aph: I have garbage collected knowledge of unfree 
> OSs from my mind"])...

I am not sure that this is the problem (the fix described after is 
designed to solve 'Stack Overflow'), but, in case it helps anybody:


From some support site for a closed source application (beware that 
numbers are somtimes in hex, sometimes in decimal):

----

 Configuring stack size for servers running on Windows

    To change the thread stack size, you must have the Microsoft editbin
utility, which is included with Microsoft Visual C++. This command line 
utility
allows you to modify object files, executable files, and dynamic link 
libraries
(DLLs). For more information on the editbin utility, see the Microsoft 
Visual
C++ documentation.

   1. Save a copy of the original server executable, jagsrv.exe in the 
EAServer
bin subdirectory.
   2. Change the thread stack size by running the following command in the
EAServer bin subdirectory:

editbin /stack:value jagsrv.exe

      where value is the new stack size, specified in bytes as a 
decimal number.
editbin rounds the value up to the closest number divisible by four. For
example, the following command sets a 64K stack size:

editbin /stack:65536  jagsrv.exe

   3. You can confirm the new setting by running the Microsoft dumpbin 
utility,
which is included with Microsoft Visual C++. Run the following command:

dumpbin /headers jagsrv.exe



      In the output, the stack size appears as a hexadecimal number on 
a line
such as this:

 80000 size of stack reserve

----



------
Want more information?  See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/
Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com