Re: Windows API calls that don't work? (Was RE: Stupid stupi

[David W Palmer <David_W_Palmer at ccm dot jf dot intel dot com>]

Text item: 

     
     Colin, 
      
     I just tried Smith's code under WinNT 4.0 using GNU-Win32 with no 
     source modifications.
     
     It compiled and ran properly with commented out code.  However, it 
     failed as he described with the code included.
     
     I also compiled it under VC++ 5.0 (though I had to change STDCALL to 
     WINAPI).  It worked fine in all cases.  The modified sample program 
     still wouldn't work when compiled with GCC.
     
> Are you using a completely vanilla version of GNU-Win32 or have you 
made changes to things (like the startup code for example)? Could you 
send me a copy of your silently failing binary?
     
     Out of the box GNU-Win32.  I'll send you a mime encoded version of my 
     gcc generated exe.  It's a little large to send to the mailing list.
     
> PS. Any confirmations on that statement about NT from other readers?
    Does stripping an executable make it work? Do you *have* to strip 
    on NT? Is there a difference between the -s link option and using 
    strip after linking?

     I tried the following commands:
        strip test.exe
     and 
        strip test.exe -o tests.exe
     
     Neither cases made any difference.
     
     Running the program from BASH under NTEmacs produces the 
     following stack dump:
     
     //f/pgming/cygtest$ ./test
     (test.exe 1279) In cygwin_except_handler
     (test.exe 1279) Exception trapped!
     (test.exe 1279) exception C0000005 at 4194
     (test.exe 1279) exception: ax 0 bx 240FB00 cx 240FDFC dx A00115C
     (test.exe 1279) exception: si 5 di 100113BF bp 240F258 sp 240F24C
     (test.exe 1279) exception is: STATUS_ACCESS_VIOLATION
     (test.exe 1279) Stack trace:
     (test.exe 1279) frame 0: sp = 0x240F080, pc = 0x1001282A
     (test.exe 1279) frame 1: sp = 0x240F09C, pc = 0x77F94072
     (test.exe 1279) frame 2: sp = 0x240F0C0, pc = 0x77F88A53
     (test.exe 1279) frame 3: sp = 0x240F14C, pc = 0x77F75E82
     (test.exe 1279) frame 4: sp = 0x240F258, pc = 0x10011BEB
     (test.exe 1279) frame 5: sp = 0x240FF9C, pc = 0x10011BFF
     (test.exe 1279) frame 6: sp = 0x240FFA8, pc = 0x4011B0
     (test.exe 1279) frame 7: sp = 0x240FFB8, pc = 0x401012
     (test.exe 1279) frame 8: sp = 0x240FFC0, pc = 0x77F1AFC1
     (test.exe 1279) frame 9: sp = 0x240FFF0, pc = 0x0
     (test.exe 1279) End of stack trace
     //f/pgming/cygtest$ 
     
     I compiled with symbols "-O -g" with gcc, then using GDB I set a brake 
     point on GetTopWindow().  The access violation was generated before it 
     got to the break point.
     
     BTW: DRS chill.  Phill is just trying to help.
     
     Dave

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Date: Mon, 24 Mar 1997 15:52:54 +0900
Subject: Windows API calls that don't work? (Was RE: Stupid stupid question :/)
Cc: "'GNU-Win32'" <gnu-win32@cygnus.com>
To: "'A. Phillip Smith'" <asmith@www.aeinc.com>
From: Colin Peters <colin@bird.fu.is.saga-u.ac.jp>
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