Re: GWorkspace hangs on first exit attempt. Remote objects problem?

[Riccardo Mottola]

Hi,

Richard Frith-Macdonald wrote:
> If it's a oneway void cal, it shouldn't be waiting for a reply. You 
> could try going back up the stack a bit and examining the invocation, 
> to see what selector is actually being used and what the type 
> information for the selector is (does it think it's oneway)? 
I rebuitl base & gworkspace with debug=yes, this is what I get:
#0  -[NSException raise] (self=0x22ee5f8,
    _cmd=0x7ffff6e188e0 <_OBJC_SELECTOR_TABLE+384>) at NSException.m:956
#1  0x00007ffff69280ca in +[NSException raise:format:arguments:] (
    self=0x7ffff6e18500 <_OBJC_Class_NSException>,
    _cmd=0x7ffff6e188b0 <_OBJC_SELECTOR_TABLE+336>,
    name=0x7ffff6e4ba60 <_OBJC_INSTANCE_0>,
    format=0x7ffff6e03800 <_OBJC_INSTANCE_68>, argList=0x7fffffffd178)
    at NSException.m:849
#2  0x00007ffff6928013 in +[NSException raise:format:] (
    self=0x7ffff6e18500 <_OBJC_Class_NSException>,
    _cmd=0x7ffff6e05480 <_OBJC_SELECTOR_TABLE+1728>,
    name=0x7ffff6e4ba60 <_OBJC_INSTANCE_0>,
    format=0x7ffff6e03800 <_OBJC_INSTANCE_68>) at NSException.m:835
#3  0x00007ffff68ed9ab in -[NSConnection(Private) _getReplyRmc:] (
    self=0x126efd8, _cmd=0x7ffff6e053c0 <_OBJC_SELECTOR_TABLE+1536>, sn=34)
    at NSConnection.m:3219
#4  0x00007ffff68e89ea in -[NSConnection(GNUstepExtensions) 
forwardInvocation:forProxy:] (self=0x126efd8, _cmd=0x7ffff6e13f10 
<_OBJC_SELECTOR_TABLE+592>,
    inv=0x1693178, object=0x145c068) at NSConnection.m:2086
#5  0x00007ffff6922b8d in -[NSDistantObject forwardInvocation:] (
    self=0x145c068, _cmd=0x7ffff6e9f5c0 <_OBJC_SELECTOR_TABLE+448>,
    anInvocation=0x1693178) at NSDistantObject.m:606
#6  0x00007ffff6a45458 in GSFFIInvocationCallback (cif=0x1711c60,
    retp=0x7fffffffd700, args=0x7fffffffd570, user=0x1711c28)
    at GSFFIInvocation.m:629
#7  0x00007ffff1bfed09 in ffi_closure_unix64_inner ()
   from /usr/lib64/libffi.so.6
#8  0x00007ffff1bff054 in ffi_closure_unix64 () from /usr/lib64/libffi.so.6
#9  0x000000000040e5d4 in -[GWorkspace applicationShouldTerminate:] (
    self=0xd30ac8, _cmd=0x7ffff75507a0 <_OBJC_SELECTOR_TABLE+5984>,
    app=0xd4ff28) at GWorkspace.m:635
#10 0x00007ffff70c5f42 in -[NSApplication terminate:] (self=0xd4ff28,
    _cmd=<optimized out>, sender=<optimized out>) at NSApplication.m:3462

(gdb) frame 9
#9  0x000000000040e5d4 in -[GWorkspace applicationShouldTerminate:] (
    self=0xd30ac8, _cmd=0x7ffff75507a0 <_OBJC_SELECTOR_TABLE+5984>,
    app=0xd4ff28) at GWorkspace.m:635
635                 [fswatcher unregisterClient: (id 
<FSWClientProtocol>)self];
(gdb) p _cmd
$1 = (const struct objc_selector *) 0x7ffff75507a0 
<_OBJC_SELECTOR_TABLE+5984>

I don't know how to print the contents of _cmd, like Sebastian did.

Hoever, for frame 6, I get:
#6  0x00007ffff6a45458 in GSFFIInvocationCallback (cif=0x1711c60,
    retp=0x7fffffffd700, args=0x7fffffffd570, user=0x1711c28)
    at GSFFIInvocation.m:629
629       [obj forwardInvocation: invocation];
(gdb) p invocation
$4 = (struct GSFFIInvocation *) 0x1693178
(gdb) p *invocation
$5 = {{{isa = 0x7ffff6e9f380 <_OBJC_Class_GSFFIInvocation>}, _sig = 
0x1693138,
    _cframe = 0x1711c60, _retval = 0x0, _target = 0x145c068,
    _selector = 0x6d7440 <_OBJC_SELECTOR_TABLE+1792>, _numArgs = 3,
    _info = 0x165b960, _argsRetained = 0 '\000', _targetRetained = 0 
'\000',
    _validReturn = 0 '\000', _sendToSuper = 0 '\000', _retptr = 0x0,
    _internal = 0x0}, _retbuf = '\000' <repeats 31 times>, _frame = 
0x1711c28}
(gdb) p invocation->_sig
$6 = (struct NSMethodSignature *) 0x1693138

here I checked:
(gdb) p [invocation->_sig isOneway]
$7 = 1 '\001'

so it appears that the information about oneway is properly passed, right?
(gdb) p invocation->_sig->_methodTypes
$9 = 0x17a9c30 "Vv24@0:8@16"

Is this enough? In case not you need to tell me which part to inspect.

Riccardo