Hi all,
I've now established to compile all of my source code for a mid-sized
production C++ Windows Service using mingw-w64-20090307 and mingw-w32-20090307.
All of this code is running stable with mingw32's gcc-3.4.5 version. (The
service is a multithreaded CORBA servant using omniORB-4.1 and runs for weeks
w/o memory leak or crashes...) The code has also undergone intensive valgrind
testing under Linux.
Nevertheless I'm getting various crashes in my application, which I'm unable
to reproduce in a test case:
- The 32bit executable seems to work on Windows XP x86 without flaws.
- The 32bit executable crashes in CosNaming::NamingContext::_narrow() insode
omniORB413_nt.dll when started under Windows XP x64.
- The 64bit executable crashes when alloca() is called. If the use of alloca()
is pmitted, it crashes lateron.
The stack traces of gdb are definitely unusable, but I got the impression that
the programs are crashing. However, when I registers Microsoft's windbg tools as
the default post-mortem debugger, I get no popup from windbg nor a dump file on
disk...
At this point I'm completely stuck. I have to wait until Linux rules the world
or until MSVC has turned into a reasonable C compiler :(
(Gosh, how old will I be when one of these happens...)
Are there any ideas/hints on how to sort out these problems?
Might it be possible, that the stack layout of mingw-w{32,64} does not conform
to any subtle detail of the specification?
Might the fact, that the 32bit executable crashes under x64 be a hint, that the
calling conventions confuse the ntdll.dll calls? (ntdll.dll is AFAIK the only
DLL, which has been replaced for WOW64 in order to dispatch kernel calls of
32bit apps to the 64bit kernel...)
Best regards and TIA, Wolfgang
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