Re: [BLACKBOX] Debugging dll accessing programs

From: [at]} <Josef>
Date: Mon, 14 Mar 2011 19:27:21 +0100

----boundary-LibPST-iamunique-770640917_-_-
Content-type: text/plain

Are you sure that the [ccall] option is required?
The docu (Dev/Docu/P-S-I.odc) says that no special handling is required for
callback procedures.

Please read the said document very carefully.
Check the parameter list and the involved data types.
It is not always an easy task to call external procedures successfully.

The <system> lines refer to procedures on the call stack that
are 'outside' of BlackBox, i.e. that have no debugging information
available for the BlackBox trap handler.
In this case, it displays all it knows, which is the program counter (pc)
and the frame pointer (fp).

- JT


----- Original Message -----
From: "Frank Hrebabetzky" <hreba{([at]})nowhere.xy
To: <BLACKBOX{([at]})nowhere.xy
Sent: Monday, March 14, 2011 1:11 PM
Subject: [BLACKBOX] Debugging dll accessing programs


> Hi all,
>
> I wrote a simple test program which uses gtk and calls an expose event
> handler. I first wrote a C version, which works fine, and translated it
> then line by line to Component Pascal. My interface modules were
> strongly inspired from a link (which I don't remember (is there an
> archive of this list?)) from romiras.
>
> Execution results in the trap shown below. The call to Gdk.draw_arc is
> marked.
>
> My problems are:
> 1. The components of noaligned or untagged records and arrays cannot be
> displayed in trap windows
> 2. I have no idea what to do with those <system> lines.
>
> So how do I debug this?
>
> ---------------------------------------------------------------------
> illegal memory read (ad = DADADCDCH)
>
> GtkDraw.Expose [00000074H]
> .data POINTER NIL
> .event POINTER [0022E320H]
> .widget POINTER [62EAC580H]
> <system> (pc=63B6A099H, fp=0022DF90H)
> <system> (pc=63A45AC9H, fp=0022E010H)
> <system> (pc=63A5698FH, fp=0022E0F0H)
> <system> (pc=63A5DE8DH, fp=0022E210H)
> <system> (pc=63A5E1F5H, fp=0022E230H)
> <system> (pc=63C8A2BEH, fp=0022E290H)
> <system> (pc=63B68A06H, fp=0022E2F0H)
> <system> (pc=6C363FF0H, fp=0022E390H)
> <system> (pc=6C363FA4H, fp=0022E430H)
> <system> (pc=6C35F4D1H, fp=0022E4A0H)
> <system> (pc=6C3612AAH, fp=0022E4E0H)
> <system> (pc=6C36131AH, fp=0022E4F0H)
> <system> (pc=6C34137BH, fp=0022E520H)
> <system> (pc=685F09EAH, fp=0022E5A0H)
> <system> (pc=685F1204H, fp=0022E620H)
> <system> (pc=685F1740H, fp=0022E660H)
> <system> (pc=63B6780FH, fp=0022E6C0H)
> GtkDraw.Main [00000155H]
> .argc POINTER NIL
> .argv POINTER NIL
> .drawingArea POINTER [62EAC580H]
> .window POINTER [62EAE000H]
> Kernel.Call [00001A63H]
> .adr INTEGER 1652490770
> ...
> ---------------------------------------------------------
>
> with GtkDraw.Expose being:
>
> ---------------------------------------------------------
>
> PROCEDURE [ccall] Expose (
> widget: Gtk.WidgetP; event: Gdk.EventExposeP; data: G.pointer): G.boolean;
> BEGIN
> (**) Out.String("widget.state="); Out.Int(ORD(widget.state),0); Out.Ln;
> Gdk.draw_arc (
> widget.window, widget.style.fg_gc[ORD(widget.state)],
> G.TRUE, 0, 0, widget.allocation.width, widget.allocation.height,
> 0, 64 * 360);
> Out.String ("expose_event"); Out.Ln;
> RETURN G.TRUE;
> END Expose;
>
> -------------------------------------------------------------
> --
> Frank Hrebabetzky +55 / 48 / 3235 1106
> Florianopolis, Brazil
>
>
> ----
> To unsubscribe, send a message with body "SIGNOFF BLACKBOX" to LISTSERV{([at]})nowhere.xy

----
To unsubscribe, send a message with body "SIGNOFF BLACKBOX" to LISTSERV{([at]})nowhere.xy----boundary-LibPST-iamunique-770640917_-_-
Content-type: application/rtf
Content-transfer-encoding: base64
Content-Disposition: attachment; filename="rtf-body.rtf"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----boundary-LibPST-iamunique-770640917_-_---

Received on Mon Mar 14 2011 - 19:27:21 UTC