Re: NSConnection-spawned runloop conflicting with "real" runloop?

[Fred Kiefer]

What happens here is that the application tries to connect the
distributed notification centre gdnc. This should either be started in
advance or should be started from here. If this is not working for you
the most likely reason is that DO isn't working at all. The best thing
to do next is to run the base test suite to see, what is actually
working and what isn't.

You will find the test suites in SVN at devmodules/tests/testsuite

Hope this helps
Fred

Am 09.02.2011 22:10, schrieb Ondřej Hošek:
> Dear GNUstep developers and users,
> 
> I am having trouble with all GUI-based GNUstep applications on my
> machine. (I have trunk of clang, libobjc2, base, gui, back and
> gworkspace installed.) Anytime I try to start a GUI program (including
> GWorkspace), it becomes stuck in a runloop caused by NSConnection
> before it has a chance to enter the "real" runloop.
> 
> The backtrace follows:
> 
> #0  0x00007ffff5c15683 in poll () from /lib/libc.so.6
> #1  0x00007ffff677c92e in -[GSRunLoopCtxt pollUntil:within:] (
>     self=<value optimized out>, _cmd=<value optimized out>,
>     milliseconds=<value optimized out>, contexts=<value optimized out>)
>     at GSRunLoopCtxt.m:424
> #2  0x00007ffff66d3fc4 in -[NSRunLoop acceptInputForMode:beforeDate:] (
>     self=<value optimized out>, _cmd=<value optimized out>,
>     mode=<value optimized out>, limit_date=<value optimized out>)
>     at NSRunLoop.m:1198
> #3  0x00007ffff66d4328 in -[NSRunLoop runMode:beforeDate:] (
>     self=<value optimized out>, _cmd=Unhandled dwarf expression opcode 0x0
> ) at NSRunLoop.m:1266
> #4  0x00007ffff6634d9d in -[NSConnection(Private) _getReplyRmc:] (
>     self=0x116f6b0, _cmd=0x7ffff6b02b30, sn=0) at NSConnection.m:3186
> #5  0x00007ffff66291ef in -[NSConnection rootProxy] (self=0x116f6b0,
>     _cmd=0x710cf0) at NSConnection.m:1671
> #6  0x00007ffff6622207 in +[NSConnection
> rootProxyForConnectionWithRegisteredName:host:usingNameServer:]
> (self=0x7ffff6b02a50, _cmd=0x7ffff6b0f300,
>     n=0x7ffff6b0fbd0, h=0x7ffff6b0fbb0, s=0x112f950) at NSConnection.m:746
> #7  0x00007ffff665e5a5 in -[NSDistributedNotificationCenter(Private) _connect]
>     (self=<value optimized out>, _cmd=Unhandled dwarf expression opcode 0x0
> )
>     at NSDistributedNotificationCenter.m:682
> #8  0x00007ffff665d7e0 in -[NSDistributedNotificationCenter
> addObserver:selector:name:object:suspensionBehavior:] (self=<value
> optimized out>,
>     _cmd=<value optimized out>, anObserver=<value optimized out>,
>     aSelector=<value optimized out>, notificationName=<value optimized out>,
>     anObject=<value optimized out>, suspensionBehavior=Unhandled dwarf
> expression opcode 0x0
> )
>     at NSDistributedNotificationCenter.m:338
> #9  0x00007ffff665d51e in -[NSDistributedNotificationCenter
> addObserver:selector:name:object:] (self=<value optimized out>,
> _cmd=0x4,
>     anObserver=<value optimized out>, aSelector=<value optimized out>,
>     notificationName=<value optimized out>, anObject=<value optimized out>)
>     at NSDistributedNotificationCenter.m:263
> #10 0x00007ffff711b0e9 in -[_GSWorkspaceCenter init] (
>     self=<value optimized out>, _cmd=Unhandled dwarf expression opcode 0x0
> ) at NSWorkspace.m:292
> #11 0x00007ffff711c78f in -[NSWorkspace init] (self=Unhandled dwarf
> expression opcode 0x0
> ) at NSWorkspace.m:692
> #12 0x00007ffff711c5b5 in +[NSWorkspace sharedWorkspace] (
>     self=<value optimized out>, _cmd=Unhandled dwarf expression opcode 0x0
> ) at NSWorkspace.m:644
> #13 0x00007ffff701e960 in -[NSDocumentController init] (
>     self=<value optimized out>, _cmd=<value optimized out>)
>     at NSDocumentController.m:312
> #14 0x00007ffff701e621 in +[NSDocumentController sharedDocumentController] (
>     self=Unhandled dwarf expression opcode 0x0
> ) at NSDocumentController.m:257
> #15 0x00007ffff6fc423b in -[NSApplication(Private)
> _targetForAction:keyWindow:mainWindow:] (self=<value optimized out>,
> _cmd=<value optimized out>,
>     aSelector=<value optimized out>, keyWindow=<value optimized out>,
>     mainWindow=<value optimized out>) at NSApplication.m:3929
> #16 0x00007ffff6fc03e8 in -[NSApplication targetForAction:to:from:] (
>     self=<value optimized out>, _cmd=Unhandled dwarf expression opcode 0x0
> ) at NSApplication.m:2295
> #17 0x00007ffff7066a40 in -[NSMenu update] (self=<value optimized out>,
>     _cmd=<value optimized out>) at NSMenu.m:1157
> #18 0x00007ffff7066921 in -[NSMenu update] (self=<value optimized out>,
>     _cmd=<value optimized out>) at NSMenu.m:1144
> #19 0x00007ffff7065f36 in -[NSMenu itemChanged:] (self=Unhandled dwarf
> expression opcode 0x0
> ) at NSMenu.m:850
> #20 0x00007ffff70712fa in -[NSMenuItem setTarget:] (
>     self=<value optimized out>, _cmd=Unhandled dwarf expression opcode 0x0
> ) at NSMenuItem.m:463
> #21 0x00007ffff7070663 in -[NSMenuItem setSubmenu:] (
>     self=<value optimized out>, _cmd=Unhandled dwarf expression opcode 0xcf
> ) at NSMenuItem.m:236
> #22 0x0000000000452cc1 in -[GWorkspace createMenu] (self=0x117d920, _cmd=0x4)
>     at GWorkspace.m:186
> #23 0x0000000000453bc4 in -[GWorkspace applicationWillFinishLaunching:] (
>     self=<value optimized out>, _cmd=<value optimized out>,
>     aNotification=<value optimized out>) at GWorkspace.m:333
> #24 0x00007ffff669433b in -[NSNotificationCenter _postAndRelease:] (
>     self=<value optimized out>, _cmd=<value optimized out>,
>     notification=<value optimized out>) at NSNotificationCenter.m:1161
> #25 0x00007ffff6fbce39 in -[NSApplication finishLaunching] (
>     self=<value optimized out>, _cmd=<value optimized out>)
>     at NSApplication.m:1028
> #26 0x00007ffff6fbe9cd in -[NSApplication run] (self=<value optimized out>,
>     _cmd=Unhandled dwarf expression opcode 0xee
> ) at NSApplication.m:1560
> #27 0x0000000000450eb6 in main (argc=18340128, argv=0x4, env=0x493df)
>     at main.m:38
> 
> (Pay no mind to the purported variable content; clang is not very
> successful at generating useful debug information yet.)
> 
> Can somebody please shed some light on this? I'm not versed in
> GNUstep's implementation details, and I'm out of ideas which part of
> the chain to probe next.
> 
> Thanks a lot!
> 
> Cheers,
> ~~ Ondra