Hi All. I have a data type of TStringArray=Array of String...

Under debugger (GDB Linux) I can't access any of the elements.

Is there a compiler option to enable information during debugging and or watching?

Presently, when Inspecting or Viewing I get an error "Cannot perform pointer math on incomplete type TSTRINGARRAY..."

Any ideas?

I not saw errors with the implementation below:

-------
   TStringArray = array of string;
implementation

{ TMainForm }

procedure TMainForm.TestButtonClick(Sender: TObject);
{$WRITEABLECONST ON}
const
   CStringArrayLength: Integer = 20;
{$WRITEABLECONST OFF}
var
   VStringArray: TStringArray;
begin
   SetLength(VStringArray, CStringArrayLength);
   VStringArray[0] := 'Test';
   ShowMessage(VStringArray[0]); // Show Test
end;
-------

Thanks Silvio,

I'm not having a problem a problem with code running. I'm not able to Inspect the contents of VStringArray while debugging via GDB in Ubuntu.

Can you inspect the variable VStringArray? How about VStringArray[0]? I can not.

This is a fresh build of FPC and Lazarus from TRUNK and a BRAND new install of Ubuntu 9.04.

There a various problems, like this. It is an issue between fpc and gdb. A lot may depend on the version of fpc and the version of gdb you use.

A few thinks you can try, but I don't know if they will work for you.

Try Dwarf versu stabs (Compiler option in Lazarus), Tab: Linking

While debugging the following has worked for me under window (not sure if I used dwarf, I think not). And it only worked if there was an explicit type:
type TStringArray = Array of String; var a: TStringArray but not for

  var a: Array of String;

instead of
a[0]
I wrote (in the watch window)
a^[0]

please also read
http://wiki.lazarus.freepascal.org/GDB_Debugger_Tips

Martin, thanks for the strength ;-) .

With I showed, had no errors. I'm using now the following (see pictures):

GDB - [http://www.4shared.com/file/122487107/bfb46cfd/gdb.html]. Lazarus - [http://www.4shared.com/file/122487336/e01adbc6/lazarus.html].

ps. Friends, I don't know much English but I try to help somehow. :-)

Try (note you need to add 4, to get to the next string)

PChar(^LONGINT(^LONGINT(@t)^+0)^)
PChar(^LONGINT(^LONGINT(@t)^+4)^)
PChar(^LONGINT(^LONGINT(@t)^+8)^)

and for the length of array (minus 4)
^LONGINT(^LONGINT(@t)^-4)^

Read also
http://forum.lazarus.freepascal.org/index.php/topic,4763.msg22954.html#msg22954 (just strings are a pointer them self, so they need one level more) http://wiki.lazarus.freepascal.org/GDB_Debugger_Tips#Dynamic_Arrays (updated)

If that doesn't help, then it wont work. (or i don't know how)

Problem is that the debugger doesn't understand the pascal concept. so you unfortunately need a lot of understanding, of how fpc encodes your data, what is a pointer, what is which kind of record....

It is improving in 2.3.1 (and maybe even more with dwarf).

If nothing helps:
LCLProc.debugln
writeln

Thanks guys.

I just wrote a toFile method for all StringArrays. And place a toFile call to inspect them. Seems easier for now. I'm sure at some point the debugger or inspector will start working :-)