Re: [fpc-devel] Re: Ubuntu 9.10 x64 AMD Debugging multi-threaded system impossible

[Volker]

Anton Kavalenka schrieb:
Jonas Maebe wrote:

On 03 Feb 2010, at 04:57, Jonathan wrote:

Andrew Brunner <andrew.t.brun...@gmail.com> wrote:

Problem solved: Project options for debugging (at least under Ubuntu
x64) required extra information file...

Project Options,
Compiler Options,
Linking,
Debugging: Check Use external gdb debug symbols file (-Xg)

Fixed my GDB resulting in X-Windows desktop manager crash for Ubuntu
X64 on trace.

That is good to know, I was using the guide at 
http://wiki.lazarus.freepascal.org/Multithreaded_Application_Tutorial.
Maybe you could update it please?

If you do so, please only mention it is as a tip that apparently 
might help if you have problems. There is no reason why using an 
external debug file should make any difference whatsoever, regardless 
of whether you are debugging a single or multi-threaded program.


Jonas
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Dear FPC-All

Debugging in GTK2-Linux of multithreaded GUI is a pain.
Some notes:
I have debugged with Eclipse C++ .so with LCL application as host, 
Eclipse hangs as well.
and entire X stops responding  (seems like X event loop was blocked).
Switching to Text console and killing host application brings desktop 
to life, but this did not help in debugging :-(

Regards, Anton



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Hi Anton

I had expired similar problems with console applications. After some 
investigations i came to the conclusion that there is something wrong 
with the dynamic loading of the "pthread" library.  Removing line 18. in 
the file "rtl/unix/cthreads.pp" ( define dynpthreads} // Useless on BSD, 
since they are in libc ) solved my problem.

Volker
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