[Pyobjc-dev] Multiple PyObjC plugins

[Duncan W. <du...@mc...>]

Hi, I have an objc leopard app that has a plain objc loadable bundle =20
plugin structure. I'm finding that doing plugins with pyobjc is great.

I don't have an extensive python experience, and python embedding is a =20=

complete mystery to me, so I borrowed Jon Wight's Python Action =20
startup code, with Ian Baird's tweaks: =
http://paste.lisp.org/display/51497

The problem I'm seeing is that the first plugin I load will work just =20=

fine, but as soon as I load a second plugin (from a second bundle, =20
with the same startup code), I'll get bad crashes, specifically Xcode =20=

will fail with an error like this:

Program received signal:  =93EXC_BAD_ACCESS=94.
Xcode: Introspection dylib not loaded because thread 1 has function: =20
=
__dyld__ZN16ImageLoaderMachO18doModInitFunctionsERKN11ImageLoader11LinkCon=
textE=20
  on stack

When running from the terminal I get a Bus Error and Crash Reporter =20
showing this backtrace:

Thread 0 Crashed:
0   org.python.python             	0x0c69d1bb PyImport_AddModule + =
29
1   org.python.python             	0x0c6a681a =
PyRun_SimpleFileExFlags =20
+ 29
2   org.python.python             	0x0c6a6ba4 PyRun_SimpleFile + 40

The PyRun_SimpleFile call is from the python startup code above.

This is on stock 10.5.1.

I also tried modifying the startup code to guard the initialization =20
like this:

	if(! Py_IsInitialized())
	{
		Py_SetProgramName("/usr/bin/python");
		Py_Initialize();
	}

but the crash didn't change.

Should I be using more lower level embedding glue? Should I be moving =20=

interpreter startup to the main app?

Thanks for any reply,
Duncan