[commonqt-devel] recent commonqt changes

Tue Dec 21 11:22:20 UTC 2010

  Dear colleagues,
  I've pushed the changes I've accumulated over the last week
to my github repository ( https://github.com/ivan4th/commonqt/ ).
Please review them and let me know whether I should push some
of them to the main repo.

Some comments.

1. I've fixed OUTPUT-FILES method on CPP->SO in qt.asd.
Without this change, commonqt was being reloaded every time,
at least when loading it via quicklisp, due to problems with
FASL relocations. Also, SWANK:DELETE-SYSTEM-FILES
was deleting only commonqt.so which didn't get restored by
make during compilation.

2. When unparseable signal/slot signature was encountered,
a rather mysteriously looking error was displayed. I've added
a check to MAKE-SLOT-OR-SIGNAL with more readable
error message.

3. To make QTYPEP more useful outside CommonQt's own
code I've made it recognize type argument specified as string
(integer values are still accepted of course).

4. I've added more QVariant conversions to qvariant.lisp.
It's still doesn't support all necessary types but at least now
it's possible to colorize and decorate these Q*Views.

5. UNMARSHALLER now caches unmarshalled closures.
This seems to improve performance a bit in
%METHOD-INVOCATION-CALLBACK as it doesn't cache
anything itself. Also, I've got rid of redundant NONCONST-NAME
function I've introduced previously. I did some tests
on a QListView code with custom model with SBCL
statistical profiler and seems like all this indeed helps
(will later distill that test code into automatic benchmark).

6. The most recent commit is an attempt to cache marshaller
closures too, which didn't succeed so far (perhaps I've did
something silly there). If you enable cached version of MARSHALLER
CommonQt crashes pretty soon when method invocation callbacks
happen. This commit shouldn't be pushed to the main repository
yet of course.

I've tried to research problems with Qt Hemlock. On my machine
it causes memory fault soon after (hi::hemlock) on (#_show window) in
HI::%INIT-SCREEN-MANAGER. After some debugging with
gdb attached to SBCL I've managed to get stack trace of the
problem (see attached file). If you google for
"QVector<QPair<double, QVariant> >::end" you'll see that the
problem is not unique. It happens somewhere in Qt intestines
in animation fx related code. Seems like QPropertyAnimation
object (it's also QVariantAnimation and QAbstractAnimation) gets
destroyed to early. I doubt this problem is directly related to
CommonQt changes and most likely it's a bug in Qt which
gets triggered by current stack state and other random reasons.
I will research it further in coming days.

-- 
Ivan Shvedunov <ivan4th at gmail.com>
;; My GPG fingerprint is: 2E61 0748 8E12 BB1A 5AB9  F7D0 613E C0F8 0BC5 2807
-------------- next part --------------
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff2af05f4 in QVector<QPair<double, QVariant> >::end (this=0x118) at ../../include/QtCore/../../src/corelib/tools/qvector.h:238
238	    inline const_iterator end() const { return p->array + d->size; }
(gdb) backtrace 
#0  0x00007ffff2af05f4 in QVector<QPair<double, QVariant> >::end (this=0x118) at ../../include/QtCore/../../src/corelib/tools/qvector.h:238
#1  0x00007ffff2aede60 in QVariantAnimationPrivate::valueAt (this=0x0, step=0) at animation/qvariantanimation.cpp:308
#2  0x00007ffff2aee942 in QVariantAnimation::keyValueAt (this=0x8d83b0, step=0) at animation/qvariantanimation.cpp:566
#3  0x00007ffff2aee86e in QVariantAnimation::startValue (this=0x8d83b0) at animation/qvariantanimation.cpp:530
#4  0x00007ffff2af337b in QPropertyAnimation::updateState (this=0x8d83b0, newState=QAbstractAnimation::Running, oldState=QAbstractAnimation::Stopped) at animation/qpropertyanimation.cpp:287
#5  0x00007ffff2aea4e5 in QAbstractAnimationPrivate::setState (this=0x8c3010, newState=QAbstractAnimation::Running) at animation/qabstractanimation.cpp:411
#6  0x00007ffff2aeb0ee in QAbstractAnimation::start (this=0x8d83b0, policy=QAbstractAnimation::DeleteWhenStopped) at animation/qabstractanimation.cpp:780
#7  0x00007ffff387157f in QWidgetAnimator::animate (this=0x89f428, widget=0x889bc0, _final_geometry=..., animate=false) at widgets/qwidgetanimator.cpp:102
#8  0x00007ffff378e325 in QDockAreaLayout::apply (this=0x89efa8, animate=false) at widgets/qdockarealayout.cpp:3080
#9  0x00007ffff37bfad8 in QMainWindowLayoutState::apply (this=0x89eed0, animated=false) at widgets/qmainwindowlayout.cpp:235
#10 0x00007ffff37c63d5 in QMainWindowLayout::applyState (this=0x89eeb0, newState=..., animate=false) at widgets/qmainwindowlayout.cpp:1925
#11 0x00007ffff37c33af in QMainWindowLayout::setGeometry (this=0x89eeb0, _r=...) at widgets/qmainwindowlayout.cpp:1473
#12 0x00007ffff325acf8 in QLayoutPrivate::doResize (this=0x89f480, r=...) at kernel/qlayout.cpp:681
#13 0x00007ffff325aded in QLayout::widgetEvent (this=0x89eeb0, e=0x7ffff4da20e0) at kernel/qlayout.cpp:705
#14 0x00007ffff3220514 in QApplicationPrivate::notify_helper (this=0x660450, receiver=0x89ebd0, e=0x7ffff4da20e0) at kernel/qapplication.cpp:4387
#15 0x00007ffff32203ad in QApplication::notify (this=0x660430, receiver=0x89ebd0, e=0x7ffff4da20e0) at kernel/qapplication.cpp:4361
#16 0x00007fffef91bd9e in __smokeqtgui::x_QApplication::notify (this=0x660430, x1=0x89ebd0, x2=0x7ffff4da20e0) at /home/ivan4th/progs/kdebindings/smoke/qtgui/x_3.cpp:913
#17 0x00007ffff2c47aec in QCoreApplication::notifyInternal (this=0x660430, receiver=0x89ebd0, event=0x7ffff4da20e0) at kernel/qcoreapplication.cpp:732
#18 0x00007ffff3222d0f in QCoreApplication::sendSpontaneousEvent (receiver=0x89ebd0, event=0x7ffff4da20e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#19 0x00007ffff32d61bf in QETWidget::translateConfigEvent (this=0x89ebd0, event=0x7ffff4da2d00) at kernel/qapplication_x11.cpp:5280
#20 0x00007ffff32cf690 in QApplication::x11ProcessEvent (this=0x660430, event=0x7ffff4da2d00) at kernel/qapplication_x11.cpp:3441
#21 0x00007ffff330d22d in x11EventSourceDispatch (s=0x664620, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#22 0x00007ffff20b1342 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#23 0x00007ffff20b52a8 in ?? () from /lib/libglib-2.0.so.0
#24 0x00007ffff20b545c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#25 0x00007ffff2c86f3b in QEventDispatcherGlib::processEvents (this=0x639fc0, flags=...) at kernel/qeventdispatcher_glib.cpp:415
#26 0x00007ffff330d950 in QGuiEventDispatcherGlib::processEvents (this=0x639fc0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007ffff40b77a0 in x_10 (xi=<value optimized out>, obj=0x8d6350, args=0x83ff00) at /home/ivan4th/progs/kdebindings/smoke/qtcore/x_1.cpp:64
#28 __smokeqtcore::xcall_QAbstractEventDispatcher (xi=<value optimized out>, obj=0x8d6350, args=0x83ff00) at /home/ivan4th/progs/kdebindings/smoke/qtcore/x_1.cpp:324
#29 0x0000001006d20c24 in ?? ()
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#31 0x0000000020100017 in ?? ()
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---Type <return> to continue, or q <return> to quit---
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---Type <return> to continue, or q <return> to quit---
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