Mac - Memory Error with TextBoxes

Sun Mar 2 03:04:58 PST 2008

Hi 

you cannot directly update a gui object on OS X form a secondary thread
without expecting problems down the road... I've only expanded the
wxTextCtrl:: WriteText method to internally make a remote call from a
secondary thread, all other methods should only be called from the main
thread.

Best,

Stefan

On 3/1/08 9:13 PM, "Kenneth Bongort" <kjb79 at cornell.edu> wrote:

> Sorry it took so long in coming, but here's a pared-down script. The
> stack trace I get when I run it is pasted below.
> 
> Thanks!
> Ken
> 
> 
> 
> On Feb 26, 2008, at 4:06 PM, Robin Dunn wrote:
> 
>> Kenneth Bongort wrote:
>>> Hello Everyone,
>>> I'm using wxPython to create a GUI, but I'm running into an error
>>> that seems to stem from updating TextBoxes. My program rapidly
>>> updates several TextBoxes, and this error always occurs after some
>>> period of time. I suspect it's a problem in wxWidgets for the Mac.
>>> Does anyone know about this issue? I pasted a stack trace below.
>> 
>> Can you reproduce the problem in a small runnable sample app?
>> 
>> -- 
>> Robin Dunn
>> Software Craftsman
>> http://wxPython.org  Java give you jitters?  Relax with wxPython!
>> 
>> 
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: wx-users-unsubscribe at lists.wxwidgets.org
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>> 
> 
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_PROTECTION_FAILURE at address: 0x00000016
> 0x90041214 in THIThemeTextInfoPublic::GetTruncation ()
> (gdb) bt
> #0  0x90041214 in THIThemeTextInfoPublic::GetTruncation ()
> #1  0x900419c8 in TCoreTextEngine::GetTextInfoOutputParameters ()
> #2  0x90046fbc in TCoreTextEngine::DrawThemeTextBox ()
> #3  0x900467c4 in DataEngine::DrawTextBox ()
> #4  0x90046574 in HIThemeDrawTextBox ()
> #5  0x901fdc70 in HIMenuBarView::DrawTextTitle ()
> #6  0x900456fc in HIMenuBarView::DrawSelf ()
> #7  0x90044e5c in HIView::DrawCacheOrSelf ()
> #8  0x90044c7c in HIView::SendDraw ()
> #9  0x9004493c in HIView::RecursiveDrawComposited ()
> #10 0x90044a3c in HIView::RecursiveDrawComposited ()
> #11 0x90043be4 in HIView::DrawComposited ()
> #12 0x90043104 in WindowData::PrepareForVisibility ()
> #13 0x900427f0 in _ShowHideWindows ()
> #14 0x900426cc in ShowHide ()
> #15 0x90042630 in MBarDraw ()
> #16 0x9002df68 in ShowBar ()
> #17 0x9004ed68 in SetMenuBarObscured ()
> #18 0x9004e7a8 in HIApplication::HandleActivated ()
> #19 0x9004c85c in HIApplication::EventObserver ()
> #20 0x90020528 in _NotifyEventLoopObservers ()
> #21 0x9004c478 in AcquireEventFromQueue ()
> #22 0x9004a160 in ReceiveNextEventCommon ()
> #23 0x018c3b40 in wxApp::MacDoOneEvent ()
> #24 0x018d9048 in wxEventLoop::Dispatch ()
> #25 0x01980e84 in wxEventLoopManual::Run ()
> #26 0x0195a2c8 in wxAppBase::MainLoop ()
> #27 0x00a61a2c in wxPyApp::MainLoop (this=0x85e750) at src/helpers.cpp:
> 156
> #28 0x00aae204 in _wrap_PyApp_MainLoop (args=0x8eba10) at src/mac/
> _core_wrap.cpp:30914
> #29 0x003ed0e4 in PyObject_Call (func=0x8eba10, arg=0x8eba10, kw=0x0)
> at /Volumes/Data/Users/ronald/Projects/python/wrk/r251/Objects/
> abstract.c:1860
> #30 0x004925c8 in PyEval_EvalFrameEx (f=0x1720cce0,
> throwflag=55197296) at /Volumes/Data/Users/ronald/Projects/python/wrk/
> r251/Python/ceval.c:3844
> #31 0x00493e10 in PyEval_EvalCodeEx (co=0x955ec0, globals=0x8eba10,
> locals=0x90041210, args=0x34a3ddc, argcount=1, kws=0x0, kwcount=0,
> defs=0x0, defcount=0, closure=0x0) at /Volumes/Data/Users/ronald/
> Projects/python/wrk/r251/Python/ceval.c:2831
> #32 0x004171f8 in function_call (func=0xfd8c30, arg=0x34a3dd0, kw=0x0)
> at /Volumes/Data/Users/ronald/Projects/python/wrk/r251/Objects/
> funcobject.c:517
> #33 0x003ed0e4 in PyObject_Call (func=0x8eba10, arg=0x8eba10, kw=0x0)
> at /Volumes/Data/Users/ronald/Projects/python/wrk/r251/Objects/
> abstract.c:1860
> #34 0x003f7d6c in instancemethod_call (func=0x8eba10, arg=0x34a3dd0,
> kw=0x0) at /Volumes/Data/Users/ronald/Projects/python/wrk/r251/Objects/
> classobject.c:2497
> #35 0x003ed0e4 in PyObject_Call (func=0x8eba10, arg=0x8eba10, kw=0x0)
> at /Volumes/Data/Users/ronald/Projects/python/wrk/r251/Objects/
> abstract.c:1860
> #36 0x00491f94 in PyEval_EvalFrameEx (f=0x1720ca60,
> throwflag=55197136) at /Volumes/Data/Users/ronald/Projects/python/wrk/
> r251/Python/ceval.c:3775
> #37 0x00491e74 in PyEval_EvalFrameEx (f=0x80af40, throwflag=388024928)
> at /Volumes/Data/Users/ronald/Projects/python/wrk/r251/Python/ceval.c:
> 3650
> #38 0x00493e10 in PyEval_EvalCodeEx (co=0xa0770, globals=0x8eba10,
> locals=0x90041210, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0,
> defcount=0, closure=0x0) at /Volumes/Data/Users/ronald/Projects/python/
> wrk/r251/Python/ceval.c:2831
> #39 0x00493fb0 in PyEval_EvalCode (co=0x8eba10, globals=0x8eba10,
> locals=0x0) at /Volumes/Data/Users/ronald/Projects/python/wrk/r251/
> Python/ceval.c:494
> #40 0x004b9cbc in PyRun_FileExFlags (fp=0xa01d1dac,
> filename=0xbffff751 "logui/ErrorDemo.py", start=657264,
> globals=0x6dd20, locals=0x6dd20, closeit=1, flags=0xbffff488) at /
> Volumes/Data/Users/ronald/Projects/python/wrk/r251/Python/pythonrun.c:
> 1271
> #41 0x004b9f00 in PyRun_SimpleFileExFlags (fp=0xa01d1dac,
> filename=0xbffff751 "logui/ErrorDemo.py", closeit=1, flags=0xbffff488)
> at /Volumes/Data/Users/ronald/Projects/python/wrk/r251/Python/
> pythonrun.c:877
> #42 0x004c98bc in Py_Main (argc=2, argv=0xbffff61c) at /Volumes/Data/
> Users/ronald/Projects/python/wrk/r251/Modules/main.c:523
> #43 0x000019bc in ?? ()
> 
> 
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