[fpc-devel] FPC 64bit and gdb on Linux

[Martin Schreiber]

Hi,
 x64 Suse 11.1, the program:
"
program gdbvarparam;
{$ifdef FPC}{$mode objfpc}{$h+}{$endif}
{$ifdef mswindows}{$apptype console}{$endif}
uses
 sysutils;
 
procedure test(var par1: integer);
begin
end;

var
 int1: integer;
begin
 int1:= 123;
 test(int1);
end.
"
The debug session:
"
mse at linuxmse64:~/proj/testcase/mse/gdbvarparam> /home/mse/packs/standard/svn/fp/fixes_2_4/compiler/ppcx64 -dsvnfixes_2_4 -gl -B -O- 
gdbvarparam.pas
Free Pascal Compiler version 2.3.1 [2009/10/23] for x86_64
Copyright (c) 1993-2009 by Florian Klaempfl
Target OS: Linux for x86-64
Compiling gdbvarparam.pas
Linking gdbvarparam
16 lines compiled, 0.6 sec
mse at linuxmse64:~/proj/testcase/mse/gdbvarparam> gdb ./gdbvarparam
GNU gdb (GDB; openSUSE 11.1) 6.8.50.20081120-cvs
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-suse-linux".
For bug reporting instructions, please see:
<http://bugs.opensuse.org/>...
(gdb) break test
Function "test" not defined.
Make breakpoint pending on future shared library load? (y or [n]) n
(gdb) break main
Breakpoint 1 at 0x4001f9: file gdbvarparam.pas, line 14.
(gdb) break gdbvarparam.pas:8
Breakpoint 2 at 0x4001ec: file gdbvarparam.pas, line 9.
(gdb) run
Starting program: /home/mse/proj/testcase/mse/gdbvarparam/gdbvarparam

Breakpoint 1, main () at gdbvarparam.pas:14
14       int1:= 123;
(gdb) c
Continuing.

Breakpoint 2, TEST (PAR1=@0x65cb70) at gdbvarparam.pas:9
9       end;
(gdb) print PAR1
$1 = (&LONGINT) @0x65cb70
(gdb)
 "

Why is it not possible to set a breakpoint to "test"?
Is it as designed that the displayed value of a var parameter is the address 
instead the value?

Martin