The auidemo sample program core dumps (wxGTK-2.8.4)

[mdefreitas]

I have the wxGTK 2.8.4 distribution built on IRIX 6.5 with the MIPS
7.4 compiler. I have GTK+ 2.4 installed on my system.

I run the auidemo sample program and then repeatedly dock and undock
the toolbars. After a while (always when a docking is finished), I get
a core dump.

This is my repeatable scenario: Once the auidemo application comes up,
I float the "Sample Bookmark Toolbar" and then grab it by the "gripper"
(not the frame title bar). I then try to redock the toolbar and once it
"starts" to redock I release the mouse button (before it completes the
drawing of the newly docked toolbar). This seems to give me a core
dump every time.

Note that I am running over the network so the drawing of the
"docking" takes a visually noticable amount of time. Also note that it
doesn't seem to happen (at least not often enough) when I grab the
floating window by the title bar... the gripper seems to be the
consistant method for producing the core dump. Also note that if I
wait for the docking to be completely done before releasing the mouse,
it does not core dump.

When I get a core dump, this is my stack trace:

__________

> 0 wxWindowBase::GetPosition(void) const(this = (nil)) ["/people/mdefreitas/wx/wxGTK/wxGTK-2.8.4/include/wx/window.h":286, 0x1011d678]
1 wxAuiManager::OnFloatingPaneMoved(wxWindow*,wxDirection)(this =
0x10a65760, wnd = 0x10b1fbb0, dir = wxUP=64) ["/people/mdefreitas/wx/
wxGTK/wxGTK-2.8.4/src/aui/framemanager.cpp":3468, 0x1012fd28]
2 wxAuiFloatingFrame::OnMoveFinished(void)(this = 0x10c45e20) ["/
people/mdefreitas/wx/wxGTK/wxGTK-2.8.4/src/aui/floatpane.cpp":287,
0x1015c6b8]
3 wxAuiFloatingFrame::OnIdle(wxIdleEvent&)(this = 0x10c45e20, event
= 0x7fff29d0) ["/people/mdefreitas/wx/wxGTK/wxGTK-2.8.4/src/aui/
floatpane.cpp":262, 0x1015ce5c]
4 wxAppConsole::HandleEvent(wxEvtHandler*,void (wxEvtHandler::*)
(wxEvent&),wxEvent&) const(this = 0x10a4b610, handler = 0x10c45e20,
func = 0, event = 0x7fff29d0) ["/people/mdefreitas/wx/wxGTK/
wxGTK-2.8.4/src/common/appbase.cpp":320, 0x106d4214]
5 wxEvtHandler::ProcessEventIfMatches(const
wxEventTableEntryBase&,wxEvtHandler*,wxEvent&)(entry = 0x10a2fa50,
handler = 0x10c45e20, event = 0x7fff29d0) ["/people/mdefreitas/wx/
wxGTK/wxGTK-2.8.4/src/common/event.cpp":1204, 0x106d97c0]
6 wxEventHashTable::HandleEvent(wxEvent&,wxEvtHandler*)(this =
0x10a2faa8, event = 0x7fff29d0, self = 0x10c45e20) ["/people/
mdefreitas/wx/wxGTK/wxGTK-2.8.4/src/common/event.cpp":877, 0x106d7ae4]
7 wxEvtHandler::ProcessEvent(wxEvent&)(this = 0x10c45e20, event =
0x7fff29d0) ["/people/mdefreitas/wx/wxGTK/wxGTK-2.8.4/src/common/
event.cpp":1266, 0x106d89dc]
8 wxEvtHandler::ProcessEvent(wxEvent&)(this = 0x10c46060, event =
0x7fff29d0) ["/people/mdefreitas/wx/wxGTK/wxGTK-2.8.4/src/common/
event.cpp":1273, 0x106d8a54]
9 wxAppBase::SendIdleEvents(wxWindow*,wxIdleEvent&)(this =
0x10a4b610, win = 0x10c45e20, event = 0x7fff29d0) ["/people/mdefreitas/
wx/wxGTK/wxGTK-2.8.4/src/common/appcmn.cpp":461, 0x1044a94c]
10 wxAppBase::SendIdleEvents(wxWindow*,wxIdleEvent&)(this =
0x10a4b610, win = 0x10a65588, event = 0x7fff29d0) ["/people/mdefreitas/
wx/wxGTK/wxGTK-2.8.4/src/common/appcmn.cpp":470, 0x1044aa2c]
11 wxAppBase::ProcessIdle(void)(this = 0x10a4b610) ["/people/
mdefreitas/wx/wxGTK/wxGTK-2.8.4/src/common/appcmn.cpp":436,
0x1044a744]
12 ::wxapp_idle_callback(void*)(<no name> = (nil)) ["/people/
mdefreitas/wx/wxGTK/wxGTK-2.8.4/src/gtk/app.cpp":207, 0x10442924]
13 g_idle_dispatch(0x0, 0x0, 0x2df, 0x0, 0x187e, 0x0, 0x10a65900,
0x10a65ad0) ["/xlv1/freeware/2003.Nov/glib2/2.4.0/glib-2.4.0.diffbuild/
glib/gmain.c":3750, 0x1dcc308]
14 g_main_dispatch(0x10a4b8f0, 0x0, 0x2df, 0x0, 0x187e, 0x0,
0x10a65900, 0x10a65ad0) ["/xlv1/freeware/2003.Nov/glib2/2.4.0/
glib-2.4.0.diffbuild/glib/gmain.c":1895, 0x1dc83ec]
15 g_main_context_dispatch(0x10a4b8f0, 0x0, 0x2df, 0x0, 0x187e,
0x0, 0x10a65900, 0x10a65ad0) ["/xlv1/freeware/2003.Nov/glib2/2.4.0/
glib-2.4.0.diffbuild/glib/gmain.c":2441, 0x1dc9960]
16 g_main_context_iterate(0x10a4b8f0, 0x1, 0x0, 0x0, 0x187e, 0x0,
0x10a65900, 0x10a65ad0) ["/xlv1/freeware/2003.Nov/glib2/2.4.0/
glib-2.4.0.diffbuild/glib/gmain.c":2522, 0x1dc9c30]
17 g_main_loop_run(0x10bc99e0, 0x0, 0x2df, 0x0, 0x187e, 0x0,
0x10a65900, 0x10a65ad0) ["/xlv1/freeware/2003.Nov/glib2/2.4.0/
glib-2.4.0.diffbuild/glib/gmain.c":2726, 0x1dca4e0]
18 gtk_main(0x0, 0x0, 0x2df, 0x0, 0x187e, 0x0, 0x10a65900,
0x10a65ad0) ["/xlv1/freeware/2003.Nov/gtk2+/2.4.0/gtk+-2.4.0.diffbuild/
gtk/gtkmain.c":1172, 0xbd3cfe8]
19 wxEventLoop::Run(void)(this = 0x10c2d2d8) ["/people/mdefreitas/
wx/wxGTK/wxGTK-2.8.4/src/gtk/evtloop.cpp":76, 0x10468ccc]
20 wxAppBase::MainLoop(void)(this = 0x10a4b610) ["/people/
mdefreitas/wx/wxGTK/wxGTK-2.8.4/src/common/appcmn.cpp":308,
0x1044a3bc]
21 wxAppBase::OnRun(void)(this = 0x10a4b610) ["/people/mdefreitas/
wx/wxGTK/wxGTK-2.8.4/src/common/appcmn.cpp":363, 0x1044a0ac]
22 ::wxEntry(int&,char**)(argc = 0x7fff2d24, argv = 0x7fff2d44) ["/
people/mdefreitas/wx/wxGTK/wxGTK-2.8.4/src/common/init.cpp":449,
0x107d18cc]
23 ::main(argc = 1, argv = 0x7fff2d44) ["/people/mdefreitas/wx/
wxGTK/wxGTK-2.8.4/samples/aui/auidemo.cpp":50, 0x100f434c]
24 __start() ["/xlv55/kudzu-apr12/work/irix/lib/libc/libc_n32_M4/
csu/crt1text.s":177, 0x100f3d38]

__________

The "this" pointer looks good until the very end. It seems that
OnFloatingPaneMoved() tries to get the wxAuiPaneInfo*, given the
wxWindow* that is passed in. Then it tries to get the wxFrame* from
the wxAuiPaneInfo*. The wxFrame* is nil.

Here is the state of the wxWindow passed into OnFloatingPaneMoved()
via the wnd argument:

class wxWindow {
m_refData = (nil)
m_nextHandler = (nil)
m_previousHandler = (nil)
m_dynamicEvents = (nil)
m_pendingEvents = (nil)
m_eventsLocker = 0x10b4ad18
m_enabled = true (1)
union {
m_clientObject = (nil)
m_clientData = (nil)
}
m_clientDataType = wxClientData_None=0
m_windowId = -206
m_parent = 0x10a65588
m_children = class wxWindowList {
m_refData = (nil)
m_count = 0
m_destroy = false (0)
m_nodeFirst = (nil)
m_nodeLast = (nil)
m_keyType = wxKEY_NONE=0
}
m_minWidth = 288
m_minHeight = 31
m_maxWidth = -1
m_maxHeight = -1
m_eventHandler = 0x10b1fbb0
m_windowValidator = (nil)
m_dropTarget = (nil)
m_cursor = class wxCursor {
m_refData = 0x10a645d8
}
m_font = class wxFont {
m_refData = (nil)
}
m_backgroundColour = class wxColour {
m_refData = (nil)
}
m_foregroundColour = class wxColour {
m_refData = (nil)
}
m_caret = (nil)
m_updateRegion = class wxRegion {
m_refData = (nil)
}
m_acceleratorTable = class wxAcceleratorTable {
m_refData = (nil)
}
m_tooltip = (nil)
m_constraints = (nil)
m_constraintsInvolvedIn = (nil)
m_windowSizer = (nil)
m_containingSizer = 0x10b27150
m_autoLayout = 0
m_isShown = 1
m_isEnabled = 1
m_isBeingDeleted = 0
m_hasBgCol = 0
m_hasFgCol = 0
m_hasFont = 0
m_inheritBgCol = 0
m_inheritFgCol = 0
m_inheritFont = 0
m_windowStyle = 548
m_exStyle = 0
m_windowName = class wxString {
m_pchData = 0x10b4c1b4 = "toolbar"
}
m_themeEnabled = false (0)
m_backgroundStyle = wxBG_STYLE_SYSTEM=0
m_palette = class wxPalette {
m_refData = (nil)
}
m_hasCustomPalette = false (0)
m_virtualSize = class wxSize {
x = -1
y = -1
}
m_scrollHelper = (nil)
m_minVirtualWidth = -1
m_minVirtualHeight = -1
m_maxVirtualWidth = -1
m_maxVirtualHeight = -1
m_windowVariant = wxWINDOW_VARIANT_NORMAL=0
m_bestSizeCache = class wxSize {
x = 288
y = 30
}
m_x = 740
m_y = 1
m_width = 288
m_height = 31
m_oldClientWidth = 0
m_oldClientHeight = 0
m_widget = 0x10b1ff70
m_wxwindow = (nil)
m_focusWidget = 0x10b1ff70
m_imData = (nil)
m_scrollBar = {
[0] (nil)
[1] (nil)
}
m_scrollPos = {
[0] 0.0
[1] 0.0
}
m_blockValueChanged = {
[0] false (0)
[1] false (0)
}
m_needParent = 1
m_noExpose = 0
m_nativeSizeEvent = 0
m_hasScrolling = 0
m_hasVMT = 1
m_sizeSet = 0
m_resizing = 0
m_acceptsFocus = 0
m_hasFocus = 0
m_isScrolling = 0
m_clipPaintRegion = 0
m_nativeUpdateRegion = class wxRegion {
m_refData = (nil)
}
m_dirtyTabOrder = 0
m_needsStyleChange = 0
m_mouseButtonDown = 0
m_blockScrollEvent = 0
m_showOnIdle = 1
m_insertCallback = 0x1047c6b0
}

And here is the wxAuiPaneInfo that GetPane(wnd) returned into the pane
variable:

class wxAuiPaneInfo {
name = class wxString {
m_pchData = 0x10c1ca04 = "tb2"
}
caption = class wxString {
m_pchData = 0x10c1caf4 = "Toolbar 2"
}
window = 0x10b1fbb0
frame = (nil)
state = 2108144
dock_direction = 1
dock_layer = 10
dock_row = 0
dock_pos = 730
best_size = class wxSize {
x = 288
y = 31
}
min_size = class wxSize {
x = -1
y = -1
}
max_size = class wxSize {
x = -1
y = -1
}
floating_pos = class wxPoint {
x = 880
y = 286
}
floating_size = class wxSize {
x = 305
y = 55
}
dock_proportion = 100000
buttons = class wxAuiPaneButtonArray {
m_nSize = 16
m_nCount = 1
m_pItems = 0x10c25c90
}
rect = class wxRect {
x = 740
y = 1
width = 288
height = 31
}
}

Note that the frame member is nil.

To get around this problem for now, I just check to see if the frame pointer is null, if so, I just return. Is this a known problem, and if so, will the fix be in a new release of wxWidgets? I thought I saw a similar problem posted on the old forums.

For reference, I posted about this on comp.soft-sys.wxwindows:
http://groups.google.com/group/comp.sof ... 89c5ac8e61

Any help would be appreciated.

TIA,
Marco

[Ben]

Hi,

Thanks for the through crash report. I'll have to investigate it further (and duplicate the problem).

All the best,
Ben