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Date: Thu, 10 Dec 2009 00:22:20 +0000
From: Dave Korn <dave DOT korn DOT cygwin AT googlemail DOT com>
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Subject: Re: [1.7] problems with compiling geos
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kiorky wrote:
> 
> kiorky a écrit :

>> (gdb)
>> 0x610bc6e2 in __small_vsprintf () from /usr/bin/cygwin1.dll
>> (gdb)
>> 0x610bc6e6 in __small_vsprintf () from /usr/bin/cygwin1.dll
>> (gdb)
>> 0x610bc6e9 in __small_vsprintf () from /usr/bin/cygwin1.dll
>> (gdb)
>> 0x61140ff0 in SetLastError AT 4 () from /usr/bin/cygwin1.dll
>> (gdb)
>> 0x7c94a156 in ntdll!RtlSetOwnerSecurityDescriptor () from
>> /cygdrive/c/WINDOWS/system32/ntdll.dll
>> (gdb)
>> 0x7c94a158 in ntdll!RtlSetOwnerSecurityDescriptor () from
>> /cygdrive/c/WINDOWS/system32/ntdll.dll
>> (gdb)
>> 0x7c94a159 in ntdll!RtlSetOwnerSecurityDescriptor () from
>> /cygdrive/c/WINDOWS/system32/ntdll.dll
>> (gdb)
>> 0x7c94a15b in ntdll!RtlSetOwnerSecurityDescriptor () from
>> /cygdrive/c/WINDOWS/system32/ntdll.dll
>> (gdb)
>> 0x7c94a161 in ntdll!RtlSetOwnerSecurityDescriptor () from
>> /cygdrive/c/WINDOWS/system32/ntdll.dll
>> (gdb)
>> 0x7c94a164 in ntdll!RtlSetOwnerSecurityDescriptor () from
>> /cygdrive/c/WINDOWS/system32/ntdll.dll
>> (gdb)
>> 0x7c94a167 in ntdll!RtlSetOwnerSecurityDescriptor () from
>> /cygdrive/c/WINDOWS/system32/ntdll.dll
>> (gdb)
>> Cannot access memory at address 0x8003
>> (gdb)
>> 0x610bc6ee in __small_vsprintf () from /usr/bin/cygwin1.dll

  I think that "cannot access" message is just an artifact of something going
on in the internals of the win32 SetLastError function, and not a real problem
(also the symbols aren't accurate, it's not really in that rtl function).
Looking at the code around the addresses you indicate:

> 610bc6e2:       8b 54 24 2c             mov    0x2c(%esp),%edx
> 610bc6e6:       89 14 24                mov    %edx,(%esp)
> 610bc6e9:       e8 02 49 08 00          call   61140ff0 <_SetLastError AT 4>
> 610bc6ee:       83 ec 04                sub    $0x4,%esp
> 610bc6f1:       2b b4 24 60 80 00 00    sub    0x8060(%esp),%esi

... it sure seems like it has called SetLastError and then managed to return
to the __small_vsprintf routine successfully.  So that error message is
/probably/ just a red herring.

> Uhm, i don't know how to advance on this one.

  Sorry about the delay, I was AFK for a while, then had to download the
latest dll version to take a look at what those addresses indicate, and my
usual mirrors have been running a bit slow.

> I tried to reinstall all cygwin applications.
> Then recompile my geos stuff, but no success.
> Is there anything else to try?

  Yeh.  Maybe there's a DLL base-address collision going on and something's
forcing libstdc++ out of the way at runtime.  Run it up to the crash under the
debugger, then take a look at the output from "info files".  The addresses
where the DLLs are loaded should match what the output of "objdump -p
<dllname> | grep ImageBase" shows.

> When will we have a libstdc++ rebase-safe out to try ? Can i have it (email, or
> such) to try it waiting for that release?

  Sure, I'll send it off-list.

    cheers,
      DaveK


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