Oracle, ProC and cygwin - troubles

Fri Nov 12 07:37:00 GMT 2004

Ole og Louise wrote:
> Hi all,
>> We are using Cygwin (1.5.11) in the process of porting an Unix-based
> application to Windows 2000/XP.
>> The application is based on Oracle DB (version 10.1.0), and the
> database is accessed through Embedded SQL (using the ProC
> precompiler).
>> So far we have a small test application compiled all right using the
> windows libraries supplied by Oracle. However the executable
> terminates with this error message:
>> $ ./sample1.exe
> 4 [main] ? 3844 cygheap_fixup_in_child: Couldn't reserve 9891528
> bytes of space for cygwin's heap (0x61780000 <0xB40000>) in child,
> Win32 error 487 c:\cygwin\home\z5ols\sample1.exe (3844): ***
> m.AllocationBase 0x0, m.BaseAddress 0x61780000, m.RegionSize 0x40000,
> m.State 0x10000
>> Other observations:
> 1. If the program is run using gdb everything runs nicely!!
> 2. If compiled with the -mno-cygwin option the program runs nicely!
> 3. We have tried to rebase the Oracle and cygwin dll's with no success.
>> What could be wrong?
>>> The following options and libraries are given for the compiler:
> $ gcc -o sample1 sample1.c -lcygwin \
> /cygdrive/c/oracle/product/10.1.0/Db_1/BIN/ORASQL10.DLL \
> /cygdrive/c/oracle/product/10.1.0/Db_1/BIN/oci.dll
>> We have also tried to use impdef and dlltool to create import
> libraries for the two dll's, but with no luck what so ever.
>> We have searched the Cygwin archives and Google for messages
> indicating similar problems related to using the Oracle DB and ProC
> together with Cygwin. Depending on which message we choose to read it
> seems either possible or completely impossible :-) We don't know what
> to believe?
>> http://groups.google.dk/groups?q=cygwin&hl=da&lr=&group=comp.databases.oracle.*&
> selm=m37jxx9bvc.fsf%40ate.maierh&rnum=6
> http://sources.redhat.com/ml/cygwin/2004-10/msg00645.html
> http://sources.redhat.com/ml/cygwin/2003-03/msg01145.html
> http://sources.redhat.com/ml/cygwin/2002-08/msg01569.html
>>> The Oracle libraries rely on MS runtime, MSVCTR.dll. Some posts state
> that the combination of cygwin1.dll and MSVCRT.dll is likely to cause
> you troubles. Maybe this is the cause of our problems. However, we
> have seen other posts stating that there should be no problems with
> this combination! Again we would apreciate some clarification on the
> issue.

You could try to increase the heap for Cygwin:
REGEDIT4
[HKEY_CURRENT_USER\SOFTWARE\Cygnus Solutions\Cygwin]
"heap_chunk_in_mb"=dword:00000400
[HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin]
"heap_chunk_in_mb"=dword:00000400
Gerrit
-- 
=^..^=
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