So... what should we do about this? I just got another report about IDL not working with the new libX11 (http://xquartz.macosforge.org/trac/ticket/469), and my hunch is that the user will provide me with a spindump that points to this issue again.
On Jan 29, 2011, at 19:24, Pat Kane wrote: >> 28 __XReply + 512 (in libX11.6.dylib) [0x6d50c0] >> ... >> 11 __XReply + 240 (in libX11.6.dylib) >> [0x6d4fb0] > > I just took a quick look at xcb_io.c to see what _XReply is doing, > and I doubt that it is reentrant. > The only way to break out of that "while(1)" loop is if "req == current". > > I wonder why the test at the top: > if(dpy->flags & XlibDisplayIOError) > return 0; > did not work. > > Pat > --- > > > > On Sat, Jan 29, 2011 at 11:54 AM, Jeremy Huddleston <jerem...@apple.com> > wrote: >> I'm trying to figure out a spin that an XQuartz user reported seeing in >> emacs. The problem seems to boil down to two things: >> >> 1) XLoadQueryFont() is erroring for some reason (probably related to >> https://bugs.freedesktop.org/show_bug.cgi?id=28803) >> >> 2) emacs' error handler seems bugged. Is it legal to call XSync() within >> the error handler? It certainly seems like it shouldn't. Did we used to >> actually support this with the xtrans version of libX11? >> >> Why are we spinning in _XReply rather than entering a deadlock here? It >> seems to me that we shouldn't wake from this ConditionWait because the >> _XReply we're nested in won't ever ConditionBroadcast()... so why is he >> seeing us spin through _XReply? It's almost as if this ConditionWait() is a >> no-op: >> >> while(1) >> { >> PendingRequest *req = dpy->xcb->pending_requests; >> xcb_generic_reply_t *response; >> >> if(req != current && req->reply_waiter) >> { >> ConditionWait(dpy, dpy->xcb->reply_notify); >> /* Another thread got this reply. */ >> continue; } >> >> >> Here's the top of the backtrace: >> >> 28 _XtCreateWidget + 168 (in libXt.6.dylib) [0x569288] >> 28 __XtCreateWidget + 700 (in libXt.6.dylib) [0x5691cc] >> 28 _xtCreate + 372 (in libXt.6.dylib) [0x568b14] >> 28 __XtGetResources + 324 (in libXt.6.dylib) [0x582124] >> 28 _GetResources + 2368 (in libXt.6.dylib) [0x581a60] >> 28 __XtConvert + 844 (in libXt.6.dylib) [0x562f2c] >> 28 _CallConverter + 872 (in libXt.6.dylib) [0x562958] >> 28 _XtCvtStringToFontStruct + 156 (in libXt.6.dylib) [0x56592c] >> 28 _XLoadQueryFont + 424 (in libX11.6.dylib) [0x6b2dd8] >> 28 __XQueryFont + 228 (in libX11.6.dylib) [0x6b1b74] >> 28 __XReply + 512 (in libX11.6.dylib) [0x6d50c0] >> 28 _handle_response + 148 (in libX11.6.dylib) [0x6d45e4] >> 28 _handle_error + 136 (in libX11.6.dylib) [0x6d42f8] >> 28 __XError + 264 (in libX11.6.dylib) [0x6d7b38] >> 28 _x_error_handler + 84 (in emacs-24.0.50.1) >> [0x105444] >> 28 _x_error_quitter + 112 (in emacs-24.0.50.1) >> [0x1053d0] >> 28 _x_connection_closed + 252 (in >> emacs-24.0.50.1) [0x10500c] >> 28 _XSync + 160 (in libX11.6.dylib) >> [0x6d00a0] >> 11 __XReply + 240 (in libX11.6.dylib) >> [0x6d4fb0] >> 5 __XReply + 236 (in libX11.6.dylib) >> [0x6d4fac] >> 5 __XReply + 248 (in libX11.6.dylib) >> [0x6d4fb8] >> 3 __XReply + 224 (in libX11.6.dylib) >> [0x6d4fa0] >> 3 __XReply + 228 (in libX11.6.dylib) >> [0x6d4fa4] >> 1 __XReply + 252 (in libX11.6.dylib) >> [0x6d4fbc] >> >> >> >> On Jan 29, 2011, at 02:23, Peter Dyballa wrote: >> >>> >>> Am 29.01.2011 um 05:50 schrieb Jeremy Huddleston: >>> >>>> Ok, well give me a spindump when your libXaw3d version is in this state. >>> >>> >>> Here it is: >>> >>> <emacs-24.0.50.1_26454.sample.txt> >>> >>> -- >>> Greetings >>> >>> Pete >>> >>> Inside every small problem is a large problem struggling to get out. >>> – Second Law of Blissful Ignorance >>> >> >> _______________________________________________ >> xorg-devel@lists.x.org: X.Org development >> Archives: http://lists.x.org/archives/xorg-devel >> Info: http://lists.x.org/mailman/listinfo/xorg-devel >> > _______________________________________________ > xorg-devel@lists.x.org: X.Org development > Archives: http://lists.x.org/archives/xorg-devel > Info: http://lists.x.org/mailman/listinfo/xorg-devel _______________________________________________ xorg-devel@lists.x.org: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
