Re: Python and target-async

[Pedro Alves <pedro at codesourcery dot com>]

I've read this about 5 times, and I still have trouble
identifying exactly what it is you're saying is broken.
Is is the second example showing a couple of frames
before the "waitpid" line?  In your example you
have "set target-async on" twice. Was that a pasto?
What exactly do you think is wrong, and what did you
expect was the right output?

On Tuesday 31 May 2011 14:51:45, Kevin Pouget wrote:
> Hello,
> 
> I'm facing a problem with Python not behaving correctly when
> "target-async" is on. I'll report it in the bugtracker if someone else
> confirms the problem:
> 
> (replace PID by any process ID to which you can attach)
> 
> > (gdb) set target-async on
> > (gdb) py gdb.execute("attach PID") ; gdb.execute("where")
> > 0x0000003cbd0aa47e in waitpid () from /lib64/libc.so.6
> > #0  0x0000003cbd0aa47e in waitpid () from /lib64/libc.so.6
> > #1  0x000000000043ede2 in ?? ()
> > #2  0x000000000044005f in wait_for ()
> > #3  0x0000000000430c45 in execute_command_internal ()
> > #4  0x0000000000430e0e in execute_command ()
> > #5  0x000000000041d526 in reader_loop ()
> > #6  0x000000000041ccde in main ()
> > (gdb) detach
> > Detaching from program ...
> > (gdb) set target-async on
> > (gdb) py gdb.execute("attach PID") ; gdb.execute("where")
> > #0  0x0000003cbd0aa47e in ?? ()
> > #1  0x0000000000000000 in ?? ()
> > 0x0000003cbd0aa47e in waitpid () from /lib64/libc.so.6
> 
> --> the inferior can't be access normally
> 
> the problem lies in the fact that GDB doesn't return from Python
> between the `attach' and the `where', (the situation occurs during a
> Python function calls as well).
> 
> > (gdb) set target-async on
> > (gdb) py gdb.execute("attach PID")
> > (gdb) py gdb.execute("where")
> 
> works correctly.
> 
> 
> I'm not sure there is something I can do to solve it, any idea what I
> should look for?
> 
> 
> thanks,
> 
> Kevin
> 

-- 
Pedro Alves