[Pyobjc-dev] Better way to use gdb.

[Bill B. <bb...@co...>]

Paste this into the main file just before the call to execve().

   if ([[[NSProcessInfo processInfo] environment] objectForKey: 
@"SHOWPID"])
     NSLog(@"Process ID is: %d (\n\tgdb %s %d\n to debug)", getpid(), 
pythonBinPathPtr, getpid());

Then, set the SHOWPID environment variable to some random value.

Upon launch, the app will spew something like:

2002-10-17 09:48:46.366 Intent[14992] Process ID is: 14992 (
	gdb /usr/bin/python 14992
  to debug)

Copy/paste the command line (middle line) into Terminal.

You can also add a custom executable to the PBX project -- set the 
executable to /usr/bin/python.  You also have to write the following 
default to cause Project Builder's gdb module to not autolaunch the 
target executable on launch (or else you'll end up debugging the 
generic Python interpreter!).

     defaults write com.apple.ProjectBuilder PBXDebuggerAutoRun NO

Once the app is launched and spews the output shown, you can type 
'attach 14992' (or whatever the PID is) to attach gdb to the 
appropriate process.   When gdb attaches to the process, it'll 
automatically load any shlibs and other symbol tables.   It will also 
stop the process -- use the continue command to continue the execution 
of the inferior process.

b.bum