wxPython因分段错误而崩溃 [英] wxPython crashes with Segmentation fault
本文介绍了wxPython因分段错误而崩溃的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我不明白为什么我的应用程序会因分段错误而崩溃.我有一个使用wxPython作为前端的python应用程序.我的应用程序因分段错误而随机崩溃，我知道它必须是wxPython，因为我具有相同代码的控制台版本，并且不会崩溃.前端是一个只读表，其中的项目会从线程中自动填充.
I'm confused to why my application crashes with Segmentation fault. I have a python app using wxPython for front end. My application crashes randomly with segmentation fault and I know it has to be wxPython because I have a console version of the same code and it doesn't crash. The front end is a read-only table with items populating it automatically from a thread.
我正在使用wxPython2.8和python 3.0版，并且正在Ubuntu 10.04上运行它.而且我不知道我做错了什么还是wxPython，如果这样我应该报告错误吗?
I'm using wxPython2.8 and python version 3.0 and I'm running it on Ubuntu 10.04. And I can't tell if I'm doing something wrong or is it wxPython and if so should I report a bug?
我在 Eclipse 调试模式下运行应用程序，运行一段时间后得到了这个:
I ran the application in eclipse debug mode and after some time running got this:
Gdk:ERROR:/build/buildd/gtk+2.0-2.20.1/gdk/gdkregion-generic.c:337:miSetExtents: assertion failed: (pExtents->y1 < pExtents->y2)
我还通过安装python3.1-gdb和 apt-get install python3.1-gdb 使用 gdb 运行了它，并得到了这个信息:
I also ran it using gdb by installing python3.1-gdb , apt-get install python3.1-gdb and got this:
Program received signal SIGSEGV, Segmentation fault.
0xb76dcfa7 in wxGridCellAttr::GetRenderer(wxGrid*, int, int) const () from /usr/lib/libwx_gtk2u_adv-2.8.so.0
我第二次使用 gdb 并调用 bt 时，我得到了:
The second time I ran with gdb and called bt I got this:
Reading symbols from /usr/bin/python...(no debugging symbols found)...done.
Starting program: /usr/bin/python main.py
[Thread debugging using libthread_db enabled]
[New Thread 0xb5c71b70 (LWP 10119)]
[New Thread 0xb53e4b70 (LWP 10120)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb5c71b70 (LWP 10119)]
0x00000061 in ?? ()
(gdb) bt
#0 0x00000061 in ?? ()
#1 0xb76e8209 in wxGrid::GetCellSize(int, int, int*, int*) () from /usr/lib/libwx_gtk2u_adv-2.8.so.0
#2 0xb76e82bb in wxGrid::CellToRect(int, int) () from /usr/lib/libwx_gtk2u_adv-2.8.so.0
#3 0xb76f6ee5 in wxGrid::SetCellValue(int, int, wxString const&) () from /usr/lib/libwx_gtk2u_adv-2.8.so.0
#4 0xb607c45b in ?? () from /usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/_grid.so
#5 0x080e0a57 in PyEval_EvalFrameEx ()
#6 0x080e2977 in PyEval_EvalCodeEx ()
#7 0x080e0fb3 in PyEval_EvalFrameEx ()
#8 0x080e20e7 in PyEval_EvalFrameEx ()
#9 0x080e2977 in PyEval_EvalCodeEx ()
#10 0x0816bdbf in ?? ()
#11 0x0806257a in PyObject_Call ()
#12 0x080df8d8 in PyEval_EvalFrameEx ()
#13 0x080e20e7 in PyEval_EvalFrameEx ()
#14 0x080e20e7 in PyEval_EvalFrameEx ()
#15 0x080e2977 in PyEval_EvalCodeEx ()
#16 0x0816bcdc in ?? ()
#17 0x0806257a in PyObject_Call ()
#18 0x0806a57c in ?? ()
#19 0x0806257a in PyObject_Call ()
#20 0x080db9f2 in PyEval_CallObjectWithKeywords ()
#21 0x0810ecf8 in ?? ()
#22 0xb7fb096e in start_thread (arg=0xb5c71b70) at pthread_create.c:300
#23 0xb7d3d3fe in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
第三次我再次使用 bt 运行它时，我得到了:
The third time I ran it with bt again I got this:
Starting program: /usr/bin/python main.py
[Thread debugging using libthread_db enabled]
[New Thread 0xb5c70b70 (LWP 13774)]
[New Thread 0xb53e3b70 (LWP 13826)]
*** glibc detected *** /usr/bin/python: double free or corruption (!prev): 0x08aec2b0
Program received signal SIGSEGV, Segmentation fault.
0xb72abcf0 in typeinfo name for wxObject () from /usr/lib/libwx_baseu-2.8.so.0
(gdb) bt
#0 0xb72abcf0 in typeinfo name for wxObject () from /usr/lib/libwx_baseu-2.8.so.0
#1 0xb76dbe59 in wxGridCellAttr::GetBackgroundColour() const () from /usr/lib/libwx_gtk2u_adv-2.8.so.0
#2 0xb76e4c8b in wxGridCellRenderer::Draw(wxGrid&, wxGridCellAttr&, wxDC&, wxRect const&, int, int, bool) () from /usr/lib/libwx_gtk2u_adv-2.8.so.0
#3 0xb76f2ea4 in wxGridCellStringRenderer::Draw(wxGrid&, wxGridCellAttr&, wxDC&, wxRect const&, int, int, bool) () from /usr/lib/libwx_gtk2u_adv-2.8.so.0
#4 0xb76eb579 in wxGrid::DrawCell(wxDC&, wxGridCellCoords const&) () from /usr/lib/libwx_gtk2u_adv-2.8.so.0
#5 0xb76eb882 in wxGrid::DrawGridCellArea(wxDC&, wxGridCellCoordsArray const&) () from /usr/lib/libwx_gtk2u_adv-2.8.so.0
#6 0xb76ece37 in wxGridWindow::OnPaint(wxPaintEvent&) () from /usr/lib/libwx_gtk2u_adv-2.8.so.0
#7 0xb71eba9f in wxAppConsole::HandleEvent(wxEvtHandler*, void (wxEvtHandler::*)(wxEvent&), wxEvent&) const () from /usr/lib/libwx_baseu-2.8.so.0
#8 0xb728a209 in wxEvtHandler::ProcessEventIfMatches(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) () from /usr/lib/libwx_baseu-2.8.so.0
#9 0xb728b2d4 in wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*) () from /usr/lib/libwx_baseu-2.8.so.0
#10 0xb728b3d3 in wxEvtHandler::ProcessEvent(wxEvent&) () from /usr/lib/libwx_baseu-2.8.so.0
#11 0xb74770c2 in wxWindow::GtkSendPaintEvents() () from /usr/lib/libwx_gtk2u_core-2.8.so.0
#12 0xb7477688 in ?? () from /usr/lib/libwx_gtk2u_core-2.8.so.0
#13 0xb6dfa434 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#14 0xb6a0f252 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#15 0xb6a2399d in ?? () from /usr/lib/libgobject-2.0.so.0
#16 0xb6a24c33 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#17 0xb6a25256 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#18 0xb6f27646 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#19 0xb6df412b in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
#20 0xb6c6284b in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#21 0xb6c627fa in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#22 0xb6c627fa in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#23 0xb6c627fa in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#24 0xb6c627fa in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#25 0xb6c627fa in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#26 0xb6c627fa in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#27 0xb6c627fa in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#28 0xb6c627fa in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#29 0xb6c627fa in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#30 0xb6c627fa in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#31 0xb6c8bad4 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#32 0xb6c5efa3 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#33 0xb6c60fbf in gdk_window_process_all_updates () from /usr/lib/libgdk-x11-2.0.so.0
#34 0xb6c6103b in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#35 0xb6c3d358 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#36 0xb695f661 in ?? () from /lib/libglib-2.0.so.0
#37 0xb69616e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#38 0xb69653d8 in ?? () from /lib/libglib-2.0.so.0
#39 0xb6965917 in g_main_loop_run () from /lib/libglib-2.0.so.0
#40 0xb6df43d9 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#41 0xb7460708 in wxEventLoop::Run() () from /usr/lib/libwx_gtk2u_core-2.8.so.0
#42 0xb74f34de in wxAppBase::MainLoop() () from /usr/lib/libwx_gtk2u_core-2.8.so.0
#43 0xb7a15b92 in wxPyApp::MainLoop() () from /usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/_core_.so
#44 0xb7a889da in ?? () from /usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/_core_.so
#45 0x080e0a57 in PyEval_EvalFrameEx ()
#46 0x080e2977 in PyEval_EvalCodeEx ()
#47 0x0816bcdc in ?? ()
#48 0x0806257a in PyObject_Call ()
#49 0x0806a57c in ?? ()
#50 0x0806257a in PyObject_Call ()
#51 0x080e0599 in PyEval_EvalFrameEx ()
#52 0x080e20e7 in PyEval_EvalFrameEx ()
#53 0x080e20e7 in PyEval_EvalFrameEx ()
#54 0x080e20e7 in PyEval_EvalFrameEx ()
#55 0x080e2977 in PyEval_EvalCodeEx ()
#56 0x080e2a77 in PyEval_EvalCode ()
#57 0x0810071d in PyRun_FileExFlags ()
#58 0x08100982 in PyRun_SimpleFileExFlags ()
#59 0x0805df7c in Py_Main ()
#60 0x0805d13b in main ()
最后一次运行时，我实际上得到了 __ kernel_vsyscall :
and the last time I ran I actually got a __kernel_vsyscall:
Reading symbols from /usr/bin/python...(no debugging symbols found)...done.
Starting program: /usr/bin/python main.py
[Thread debugging using libthread_db enabled]
[New Thread 0xb5c71b70 (LWP 20640)]
[New Thread 0xb53e4b70 (LWP 20662)]
*** glibc detected *** /usr/bin/python: double free or corruption (!prev): 0x08aec298 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6(+0x6e341)[0xb7cd8341]
/lib/tls/i686/cmov/libc.so.6(+0x6fb98)[0xb7cd9b98]
/lib/tls/i686/cmov/libc.so.6(cfree+0x6d)[0xb7cdcc7d]
/usr/lib/libstdc++.so.6(_ZdlPv+0x21)[0xb716d741]
/usr/lib/libwx_baseu-2.8.so.0(_ZN21wxClientDataContainerD0Ev+0x33)[0xb71ee293]
/usr/lib/libwx_gtk2u_adv-2.8.so.0(_ZN6wxGrid11GetCellSizeEiiPiS0_+0x59)[0xb76e8209]
/usr/lib/libwx_gtk2u_adv-2.8.so.0(_ZN6wxGrid10CellToRectEii+0xab)[0xb76e82bb]
/usr/lib/libwx_gtk2u_adv-2.8.so.0(_ZN6wxGrid12SetCellValueEiiRK8wxString+0x85)[0xb76f6ee5]
/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode/wx/_grid.so(+0x1f45b)[0xb607c45b]
/usr/bin/python(PyEval_EvalFrameEx+0x40f7)[0x80e0a57]
/usr/bin/python(PyEval_EvalCodeEx+0x857)[0x80e2977]
/usr/bin/python(PyEval_EvalFrameEx+0x4653)[0x80e0fb3]
/usr/bin/python(PyEval_EvalFrameEx+0x5787)[0x80e20e7]
/usr/bin/python(PyEval_EvalCodeEx+0x857)[0x80e2977]
/usr/bin/python[0x816bdbf]
/usr/bin/python(PyObject_Call+0x4a)[0x806257a]
/usr/bin/python(PyEval_EvalFrameEx+0x2f78)[0x80df8d8]
/usr/bin/python(PyEval_EvalFrameEx+0x5787)[0x80e20e7]
/usr/bin/python(PyEval_EvalFrameEx+0x5787)[0x80e20e7]
/usr/bin/python(PyEval_EvalCodeEx+0x857)[0x80e2977]
/usr/bin/python[0x816bcdc]
/usr/bin/python(PyObject_Call+0x4a)[0x806257a]
/usr/bin/python[0x806a57c]
/usr/bin/python(PyObject_Call+0x4a)[0x806257a]
/usr/bin/python(PyEval_CallObjectWithKeywords+0x42)[0x80db9f2]
/usr/bin/python[0x810ecf8]
/lib/tls/i686/cmov/libpthread.so.0(+0x596e)[0xb7fb096e]
/lib/tls/i686/cmov/libc.so.6(clone+0x5e)[0xb7d3d3fe]
======= Memory map: ========
08048000-08229000 r-xp 00000000 08:01 12322846 /usr/bin/python2.6
08229000-0822a000 r--p 001e0000 08:01 12322846 /usr/bin/python2.6
0822a000-08279000 rw-p 001e1000 08:01 12322846 /usr/bin/python2.6
08279000-08b35000 rw-p 00000000 00:00 0 [heap]
b4a00000-b4a7b000 rw-p 00000000 00:00 0
b4a7b000-b4b00000 ---p 00000000 00:00 0
b4bb2000-b4be0000 r-xp 00000000 08:01 12717595 /usr/lib/python2.6/lib-dynload/pyexpat.so
b4be0000-b4be2000 r--p 0002d000 08:01 12717595 /usr/lib/python2.6/lib-dynload/pyexpat.so
b4be2000-b4be3000 rw-p 0002f000 08:01 12717595 /usr/lib/python2.6/lib-dynload/pyexpat.so
b4be3000-b4be4000 rw-p 00000000 00:00 0
b4be4000-b4be5000 ---p 00000000 00:00 0
b4be5000-b53e5000 rw-p 00000000 00:00 0
b53e5000-b5471000 r--p 00000000 08:01 13370974 /usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf
b5471000-b5472000 ---p 00000000 00:00 0
b5472000-b5c72000 rw-p 00000000 00:00 0
b5c72000-b5d0a000 r--p 00000000 08:01 13370975 /usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
b5d0a000-b5d14000 r-xp 00000000 08:01 4718773 /lib/libudev.so.0.6.1
b5d14000-b5d15000 r--p 00009000 08:01 4718773 /lib/libudev.so.0.6.1
b5d15000-b5d16000 rw-p 0000a000 08:01 4718773 /lib/libudev.so.0.6.1
b5d16000-b5d3a000 r-xp 00000000 08:01 12327322 /usr/lib/gio/modules/libgvfsdbus.so
b5d3a000-b5d3b000 r--p 00023000 08:01 12327322 /usr/lib/gio/modules/libgvfsdbus.so
b5d3b000-b5d3c000 rw-p 00024000 08:01 12327322 /usr/lib/gio/modules/libgvfsdbus.so
b5d3c000-b5d50000 r-xp 00000000 08:01 12324166 /usr/lib/libgvfscommon.so.0.0.0
b5d50000-b5d51000 r--p 00013000 08:01 12324166 /usr/lib/libgvfscommon.so.0.0.0
b5d51000-b5d52000 rw-p 00014000 08:01 12324166 /usr/lib/libgvfscommon.so.0.0.0
b5d6e000-b5da5000 r-xp 00000000 08:01 4718707 /lib/libdbus-1.so.3.4.0
b5da5000-b5da6000 r--p 00036000 08:01 4718707 /lib/libdbus-1.so.3.4.0
b5da6000-b5da7000 rw-p 00037000 08:01 4718707 /lib/libdbus-1.so.3.4.0
b5da7000-b5de0000 r-xp 00000000 08:01 12324182 /usr/lib/libibus.so.1.0.0
b5de0000-b5de1000 r--p 00039000 08:01 12324182 /usr/lib/libibus.so.1.0.0
b5de1000-b5de2000 rw-p 0003a000 08:01 12324182 /usr/lib/libibus.so.1.0.0
b5de7000-b5de9000 r-xp 00000000 08:01 12584487 /usr/lib/pango/1.6.0/modules/pango-basic-fc.so
b5de9000-b5dea000 r--p 00001000 08:01 12584487 /usr/lib/pango/1.6.0/modules/pango-basic-fc.so
b5dea000-b5deb000 rw-p 00002000 08:01 12584487 /usr/lib/pango/1.6.0/modules/pango-basic-fc.so
b5deb000-b5dfc000 r-xp 00000000 08:01 12327321 /usr/lib/gio/modules/libgioremote-volume-monitor.so
b5dfc000-b5dfd000 r--p 00011000 08:01 12327321 /usr/lib/gio/modules/libgioremote-volume-monitor.so
b5dfd000-b5dfe000 rw-p 00012000 08:01 12327321 /usr/lib/gio/modules/libgioremote-volume-monitor.so
b5dfe000-b5e03000 r-xp 00000000 08:01 12327767 /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so
b5e03000-b5e04000 r--p 00004000 08:01 12327767 /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so
b5e04000-b5e05000 rw-p 00005000 08:01 12327767 /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so
b5e05000-b5e06000 r--s 00000000 08:01 11796545 /var/cache/fontconfig/c05880de57d1f5e948fdfacc138775d9-le32d4.cache-3
b5e06000-b5e0c000 r--s 00000000 08:01 11796542 /var/cache/fontconfig/945677eb7aeaf62f1d50efc3fb3ec7d8-le32d4.cache-3
b5e0c000-b5e0e000 r--s 00000000 08:01 11796543 /var/cache/fontconfig/99e8ed0e538f840c565b6ed5dad60d56-le32d4.cache-3
b5e0e000-b5e11000 r--s 00000000 08:01 11796552 /var/cache/fontconfig/e383d7ea5fbe662a33d9b44caf393297-le32d4.cache-3
b5e11000-b5e13000 r--s 00000000 08:01 11803601 /var/cache/fontconfig/ea47318ec9849e1a71e80a5d69d13859-le32d4.cache-3
b5e13000-b5e14000 r--s 00000000 08:01 11803600 /var/cache/fontconfig/e3fa16a14183b06aa45b3e009278fd14-le32d4.cache-3
b5e14000-b5e15000 r--s 00000000 08:01 11796553 /var/cache/fontconfig/e7071f4a29fa870f4323321c154eba04-le32d4.cache-3
b5e15000-b5e17000 r--s 00000000 08:01 11804137 /var/cache/fontconfig/b5ea634b0fb353b8ea17632d1f9ef766-le32d4.cache-3
b5e17000-b5e1a000 r--s 00000000 08:01 11796539 /var/cache/fontconfig/6eb3985aa4124903f6ff08ba781cd364-le32d4.cache-3
b5e1a000-b5e1b000 r--s 00000000 08:01 11796535 /var/cache/fontconfig/4c73fe0c47614734b17d736dbde7580a-le32d4.cache-3
b5e1b000-b5e1c000 r--s 00000000 08:01 11796529 /var/cache/fontconfig/0d8c3b2ac0904cb8a57a757ad11a4a08-le32d4.cache-3
b5e1c000-b5e1d000 r--s 00000000 08:01 11796537 /var/cache/fontconfig/6a53c69dea097a2d716e069445527da8-le32d4.cache-3
b5e1d000-b5e21000 r--s 00000000 08:01 11796544 /var/cache/fontconfig/a755afe4a08bf5b97852ceb7400b47bc-le32d4.cache-3
b5e21000-b5e28000 r--s 00000000 08:01 11803865 /var/cache/fontconfig/6d41288fd70b0be22e8c3a91e032eec0-le32d4.cache-3
b5e28000-b5e33000 r--s 00000000 08:01 11796530 /var/cache/fontconfig/0f34bcd4b6ee430af32735b75db7f02b-le32d4.cache-3
b5e33000-b5e55000 r--s 00000000 08:01 11803842 /var/cache/fontconfig/365b55f210c0a22e9a19e35191240f32-le32d4.cache-3
b5e55000-b5e5d000 r--s 00000000 08:01 11796548 /var/cache/fontconfig/d52a8644073d54c13679302ca1180695-le32d4.cache-3
b5e5d000-b5e87000 r-xp 00000000 08:01 12327750 /usr/lib/gtk-2.0/2.10.0/engines/libclearlooks.so
b5e87000-b5e88000 r--p 00029000 08:01 12327750 /usr/lib/gtk-2.0/2.10.0/engines/libclearlooks.so
Program received signal SIGABRT, Aborted.
[Switching to Thread 0xb5c71b70 (LWP 20640)]
0xb7fe2430 in __kernel_vsyscall ()
推荐答案
首先，wxPython 2.8不适用于Python 3，因此您的部分描述没有任何意义.有一个可以与Python 3一起使用的wxPython 2.9 Phoenix版本，但是现在它是beta之前的版本.
First of all, wxPython 2.8 doesn't work with Python 3, so that part of your description doesn't make sense. There is a wxPython 2.9 Phoenix version that DOES work with Python 3, but it's kind of pre-beta right now.
您提到要通过线程更新Grid小部件.如果您实际上是直接在线程中设置单元格的值(即myGrid.SetCellValue())，那么您这样做是不正确的.wxPython具有必须使用线程安全的方法来从线程与GUI进行通信.如下:
You mention that you are updating the Grid widget via threads. If you are actually setting a value of cell directly (i.e. myGrid.SetCellValue()) from within a thread, then you're doing it incorrectly. wxPython has thread-safe methods that must be used to communicate from the thread to the GUI. Those are as follows:
- wx.CallAfter
- wx.CallLater
- wx.PostEvent
您应该阅读以下文章，以查看有关其工作原理的示例:
You should read the following articles to see examples of how this works:
- http://wiki.wxpython.org/LongRunningTasks
- http://www.blog.pythonlibrary.org/2010/05/22/wxpython-and-threads/
这些方法适用于从线程到wxPython GUI的任何类型的交互，而不仅仅是在更新网格时.例如，您可能具有需要更新的文本或列表控件.如果是这样，您仍然需要使用上述方法之一.
Those methods apply to ANY kind of interaction from a thread to the wxPython GUI, not just when updating the grid. For example, you might have a text or list control that you need to update. If so, you would still need to use one of the aforementioned methods to do so.
如@multiphrenic所述，您应该创建一个小的可运行示例应用程序，以显示您遇到的问题.您可以在 wxPython Wiki 上阅读所有有关操作方法的信息.
As mentioned by @multiphrenic, you should create a small runnable sample application that shows the issue you are having. You can read all about how to do that on the wxPython wiki.
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