Re: [Pyobjc-dev] Problem with pyObjC and Swift

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Plugins written in Swift don't strike me as a good idea until we have ABI
stability. What if two plugins are loaded with different swift runtimes?
You can work-around that if your architecture loads plugins in a separate
process and communicates via XPC (or similar).

I work on a plugin for FCPX. We considered Swift, but it's a no-go until we
have ABI stability for the above reason.

Cheers,

John
--
John Buckley LBIPP M.Eng. Ph.D.
+44 7740 099518
johnbuckleyphotography.uk

On Thu, 30 Mar 2017 at 10:27 Georg Seifert <geo...@gm...> wrote:

> Hi
>
> I have an app written in ObjectiveC. It allows loading plugins from third
> parties. Most of those are written in python, some in ObjectiveC. Now
> someone tries to write on in Swift. That plugin works as expected but all
> the python plugin don't work any more and crash the app. At least when the
> plugin is build with Xcode 8 and Swift 3. Compiling it on Xcode 7 (macOS
> 10.10) works fine. Running the Xcode 8 version on 10.10 crashes, too.
>
> The app links agains the system python framework.
>
> Anyone has knows anything about this?
>
> Thanks
> Georg Seifert
>
> p.s. I get backtraces like this:
>
> Calling a method on an python object inheriting from NSObject
>
> #0      0x0000000100a56ed7 in ___lldb_unnamed_function679$$Python ()
> #1      0x0000000100a584f1 in PyDict_SetItemString ()
> #2      0x00000001098319a5 in PyObjCClass_CheckMethodList ()
> #3      0x0000000109832543 in ___lldb_unnamed_function453$$_objc.so ()
> #4      0x0000000100aa3238 in ___lldb_unnamed_function1431$$Python ()
> #5      0x0000000100aa9d8c in PyEval_EvalFrameEx ()
> #6      0x0000000100aa6352 in PyEval_EvalCodeEx ()
> #7      0x0000000100a4a5de in ___lldb_unnamed_function510$$Python ()
> #8      0x0000000100a2c50a in PyObject_Call ()
> #9      0x0000000109831c04 in PyObjCClass_CheckMethodList ()
> #10     0x00000001098361ed in PyObjCObject_New ()
> #11     0x00000001098368fa in ___lldb_unnamed_function487$$_objc.so ()
> #12     0x000000010983955d in pythonify_c_value ()
> #13     0x000000010982654a in ___lldb_unnamed_function373$$_objc.so ()
> #14     0x00007fff87356a07 in ffi_closure_unix64_inner ()
> #15     0x00007fff873560c6 in ffi_closure_unix64 ()
>
> or:
>
> calling [NSBundle principalClass] on the plugin containing the python class
>
> #0      0x0000000100a99bd3 in ___lldb_unnamed_symbol679$$Python ()
> #1      0x0000000100a9b1cd in PyDict_SetItemString ()
> #2      0x000000010e6a21cb in PyObjCClass_CheckMethodList ()
> #3      0x000000010e6a51a4 in PyObjCClass_FindSelector ()
> #4      0x000000010e6b0aef in PyObjCSelector_FromFunction ()
> #5      0x000000010e6a3005 in ___lldb_unnamed_symbol454$$_objc.so ()
> #6      0x0000000100a9fb14 in PyObject_SetAttr ()
> #7      0x0000000100ae97a6 in PyEval_EvalFrameEx ()
> #8      0x0000000100ae79be in PyEval_EvalCodeEx ()
> #9      0x0000000100ae7367 in PyEval_EvalCode ()
> #10     0x0000000100afc6bd in PyImport_ExecCodeModuleEx ()
> #11     0x0000000100aff3c7 in ___lldb_unnamed_symbol1546$$Python ()
> #12     0x0000000100afee2c in ___lldb_unnamed_symbol1545$$Python ()
> #13     0x0000000100afea00 in ___lldb_unnamed_symbol1543$$Python ()
> #14     0x0000000100afdc10 in PyImport_ImportModuleLevel ()
> #15     0x0000000100ae3006 in ___lldb_unnamed_symbol1412$$Python ()
> #16     0x0000000100a6f6fb in PyObject_Call ()
> #17     0x0000000100aeddbb in PyEval_CallObjectWithKeywords ()
> #18     0x0000000100ae9c0f in PyEval_EvalFrameEx ()
> #19     0x0000000100ae79be in PyEval_EvalCodeEx ()
> #20     0x0000000100ae7367 in PyEval_EvalCode ()
> #21     0x0000000100afc6bd in PyImport_ExecCodeModuleEx ()
> #22     0x0000000100aff3c7 in ___lldb_unnamed_symbol1546$$Python ()
> #23     0x0000000100aff64f in ___lldb_unnamed_symbol1548$$Python ()
> #24     0x0000000100afee2c in ___lldb_unnamed_symbol1545$$Python ()
> #25     0x0000000100afea41 in ___lldb_unnamed_symbol1543$$Python ()
> #26     0x0000000100afdbd8 in PyImport_ImportModuleLevel ()
> #27     0x0000000100ae3006 in ___lldb_unnamed_symbol1412$$Python ()
> #28     0x0000000100a6f6fb in PyObject_Call ()
> #29     0x0000000100aeddbb in PyEval_CallObjectWithKeywords ()
> #30     0x0000000100ae9c0f in PyEval_EvalFrameEx ()
> #31     0x0000000100ae79be in PyEval_EvalCodeEx ()
> #32     0x0000000100ae7367 in PyEval_EvalCode ()
> #33     0x0000000100afc6bd in PyImport_ExecCodeModuleEx ()
> #34     0x0000000100aff4e1 in ___lldb_unnamed_symbol1547$$Python ()
> #35     0x0000000100aff64f in ___lldb_unnamed_symbol1548$$Python ()
> #36     0x0000000100afee2c in ___lldb_unnamed_symbol1545$$Python ()
> #37     0x0000000100afea00 in ___lldb_unnamed_symbol1543$$Python ()
> #38     0x0000000100afdbd8 in PyImport_ImportModuleLevel ()
> #39     0x0000000100ae3006 in ___lldb_unnamed_symbol1412$$Python ()
> #40     0x0000000100a6f6fb in PyObject_Call ()
> #41     0x0000000100aeddbb in PyEval_CallObjectWithKeywords ()
> #42     0x0000000100ae9c0f in PyEval_EvalFrameEx ()
> #43     0x0000000100ae79be in PyEval_EvalCodeEx ()
> #44     0x0000000100ae7367 in PyEval_EvalCode ()
> #45     0x0000000100b075dd in ___lldb_unnamed_symbol1599$$Python ()
> #46     0x0000000100b07680 in PyRun_FileExFlags ()
> #47     0x0000000100ae3cbd in ___lldb_unnamed_symbol1427$$Python ()
> #48     0x0000000100aeb4d4 in PyEval_EvalFrameEx ()
> #49     0x0000000100ae79be in PyEval_EvalCodeEx ()
> #50     0x0000000100aee3e2 in ___lldb_unnamed_symbol1476$$Python ()
> #51     0x0000000100aeae4e in PyEval_EvalFrameEx ()
> #52     0x0000000100ae79be in PyEval_EvalCodeEx ()
> #53     0x0000000100ae7367 in PyEval_EvalCode ()
> #54     0x0000000100b075dd in ___lldb_unnamed_symbol1599$$Python ()
> #55     0x0000000100b07680 in PyRun_FileExFlags ()
> #56     0x0000000100b0890a in PyRun_File ()
> #57     0x000000010e5bea86 in ___lldb_unnamed_symbol1$$plugin ()
> #58     0x00000001002cfa1b in
> ImageLoaderMachO::doModInitFunctions(ImageLoader::LinkContext const&) ()
> #59     0x00000001002cfc1e in
> ImageLoaderMachO::doInitialization(ImageLoader::LinkContext const&) ()
> #60     0x00000001002cb4aa in
> ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&,
> unsigned int, char const*, ImageLoader::InitializerTimingList&,
> ImageLoader::UninitedUpwards&) ()
> #61     0x00000001002ca524 in
> ImageLoader::processInitializers(ImageLoader::LinkContext const&, unsigned
> int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) ()
> #62     0x00000001002ca5b9 in
> ImageLoader::runInitializers(ImageLoader::LinkContext const&,
> ImageLoader::InitializerTimingList&) ()
> #63     0x00000001002bf7cd in dyld::runInitializers(ImageLoader*) ()
> #64     0x00000001002c73ec in dlopen ()
> #65     0x00007fffaa2ac832 in dlopen ()
> #66     0x00007fff94b7a249 in _CFBundleDlfcnLoadBundle ()
> #67     0x00007fff94b7a0ca in _CFBundleLoadExecutableAndReturnError ()
> #68     0x00007fff9656283f in _NSBundleLoadCode ()
> #69     0x00007fff96562425 in -[NSBundle loadAndReturnError:] ()
> #70     0x00007fff965aca16 in -[NSBundle principalClass] ()
>
>
>
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