[Gambas-devel] Debugging gambas-source-code

[Charlie Reinl]

>
>
>On Mon, 28 Mar 2005, Charlie Reinl wrote:
>
>>>>> Thanks.
>>>>>
>>>>> But I think that gbx -p does that, so I will look if I pass the
>>>>> args in a right way.
>>>>
>>>>
>>>> The arg was set right and the modules are NOT loaded,
>>>> I can debug it in gbx,
>>>> but when gbx has done his job, the thread says 'runnig' but shows no
>> more
>>>>
>>>> loaded part.
>>>>
>>>> Anything to do, to load that, or ???
>>>>
>>> It's a step by step list.
>>>
>>> Here's a clarified version, using command line gdb:
>>>
>>> $ gdb gbx  <- start gdb from the command line
>>> set args -p <- set program arguments to disable preloading
>>> break TRACE_init <- set our initial breakpoint
>>> run <- execute gbx.
>>> (gdb stops at TRACE_init, and you get a gdb prompt.)
>>>>>> !Here's where you can set your breakpoints!<<<
>>> example: "break CTableView.cpp:45" should break on or near line 45 of
>> file
>>> CTableView.cpp.
>>> cont <- continue execution from where we entered the debugger.
>>> (gdb now stops at your breakpoints)
>>>
>> Salut,
>>
>> here my output,
>>
>> bash-2.05b$ cd /opt/gambas/gambas/app/gambas
>>
>> bash-2.05b$ gdb gbx
>>
>> GNU gdb 6.0
>> Copyright 2003 Free Software Foundation, Inc.
>> GDB is free software, covered by the GNU General Public License, and
you
>> are
>> welcome to change it and/or distribute copies of it under certain
>> conditions.
>> Type "show copying" to see the conditions.
>> There is absolutely no warranty for GDB.  Type "show warranty" for
>> details.
>> This GDB was configured as "i686-pc-linux-gnu"...Using host
libthread_db
>> library "/lib/libthread_db.so.1".
>>
>> (gdb) set args -p
>>
>> (gdb) break TRACE_init
>>
>> Breakpoint 1 at 0x805008c: file gbx_trace.c, line 234.
>>
>> (gdb) run
>> Starting program: /usr/bin/gbx -p
>> warning: Unable to find dynamic linker breakpoint function.
>> GDB will be unable to debug shared library initializers
>> and track explicitly loaded dynamic code.
>
>Huh?
>
>That shouldn't happen.  That would explain why my instructions don't
>work.
>
>What does "uname -a" report?
>
>That message means that /lib/ld-linux.so.2 is stripped, which prevents
GDB
>from detecting runtime loaded modules, which is something that's needed
to
>debug plugins.
>
>
>>
>> Breakpoint 1, TRACE_init () at gbx_trace.c:234
>> 234       if (!EXEC_debug)
>>
>> (gdb) break /opt/gambas/gambas/src/lib/qt/ext/CTableView.cpp:1074
>> No source file named /opt/gambas/gambas/src/lib/qt/ext/CTableView.cpp.
>
>GDB doesn't know about CTableView.cpp because it failed to hook the
>module load routine. (the warning message above)
>
>>
>> (gdb) break CTableView.cpp:1074
>> No source file named CTableView.cpp.
>>
>
>Again, GDB doesn't know about the file because it couldn't detect the
>module was loaded.
>
>> I had a look to qt/ext and I'm saw it was compiled with -g
>> So it has to be something else, I ignore ?
>>
>> To you have an easier call, which work on your box. Just for testing ?
>>
>Post your "uname -a" result and I'll figure out how you can get the
>debugging version of ld installed.  Then the instructions will work.
>
Linux gentoo01 2.6.8-gentoo-r3 #1 SMP Sun Feb 13 21:57:11 CET 2005 i686
AMD Athlon(tm) MP AuthenticAMD GNU/Linux
>
and here more about my box

Using:
 - gambas-1.0.4  (downloaded from the gambas-shrine)
 - X Window System Version 6.8.2 Release Date: 9 February 2005
  X Protocol Version 11, Revision 0, Release 6.8.2
  Build Operating System: Linux 2.6.8-gentoo-r3 i686 [ELF]
  Current Operating System: Linux gentoo01 2.6.8-gentoo-r3 #1 SMP
   Sun Feb 13 21:57:11 CET 2005 i686
- gentoo 1.4 (last Updated 27.03.2005) on Gentoo Base System version
1.4.16
- Qt: 3.3.3
 - KDE: 3.3.1
 - gcc (GCC) 3.3.4 20040623 (Gentoo Linux 3.3.4-r1, ssp-3.3.2-2,
pie-8.7.6)
 - mysql  Ver 12.22 Distrib 4.0.22, for pc-linux-gnu (i686)
 - psql (PostgreSQL) 7.4.6
 - sqlite 2.8.15
 - GNU Make 3.80>>
>> Amicalment
>> Charlie
>> * Gesendet mit / Sent by: FEN-Webmail * http://www.fen-net.de *
>>
>>
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