OpenEuphoria

Euphoria and Windows XP SP2

• Posted by Tommy Carlier <tommy.carlier at telenet.be> Sep 18, 2004
• 475 views

I just updated to Windows XP SP2, and there were some
problems with Euphoria. My computer is only a few months
old, and has an AMD Athlon64 CPU, which has builtin DEP
(data execution protection). When enabled, this prevents
data from being executed.
In SP2, DEP is by default enabled only for critical
services and applications. This causes no problems with
Euphoria. However, when I enable it for ALL applications,
Euphoria-programs get machine errors. Like suggested in
previous posts, the manually constructed assembly-routines
cause problems. But there were also problems with c_func
and c_proc: I can show a message_box from Euphoria, but
I can't open a window (CreateWindow and CreateWindowEx
throw an error). This even happens with the small demos
that come with Euphoria (WINDOW.EXW, WINWIRE.EXW).

As I said, the default settings of SP2 cause no problems,
but if DEP is enabled for all applications, even the simplest
Euphoria Win32-application crashes (leaves with a machine error).

Below, you find EX.ERR produced by WINDOW.EXW:

C:\EUPHORIA\DEMO\WIN32\WINDOW.EXW:228 in procedure WinMain() 
A machine-level exception occurred during execution of this statement 
    szAppName = 682872
    hwnd = <no value>
    msg = 682824
    wndclass = 682768
    WndProcAddress = 683000
    class = 704865
    id = 0
    icon_handle = 590457

... called from C:\EUPHORIA\DEMO\WIN32\WINDOW.EXW:254 

Global & Local Variables

 C:\EUPHORIA\include\misc.e:
    pretty_end_col = <no value>
    pretty_chars = <no value>
    pretty_start_col = <no value>
    pretty_level = <no value>
    pretty_file = <no value>
    pretty_ascii = <no value>
    pretty_indent = <no value>
    pretty_ascii_min = <no value>
    pretty_ascii_max = <no value>
    pretty_fp_format = <no value>
    pretty_int_format = <no value>
    pretty_line = <no value>

 C:\EUPHORIA\include\machine.e:
    mem = 666392
    check_calls = 1

 C:\EUPHORIA\DEMO\WIN32\WINDOW.EXW:
    LoadIcon = 0
    LoadCursor = 1
    GetStockObject = 2
    RegisterClassEx = 3
    CreateWindow = 4
    ShowWindow = 5
    UpdateWindow = 6
    GetMessage = 7
    TranslateMessage = 8
    DispatchMessage = 9
    PlaySound = 10
    BeginPaint = 11
    GetClientRect = 12
    DrawText = 13
    EndPaint = 14
    PostQuitMessage = 15
    DefWindowProc = 16
    wav_file = 529352
    Euphoria = 682000
    ps = 682048
    rect = 682120
    my_title = 682248

--
tommy online: http://users.telenet.be/tommycarlier
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