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我有一个使用 cairo、poppler 和 gtk+ 的程序 (gummi)。每次我用 alt-tab 切换焦点时（但当我使用其他方式改变焦点时不会这么多），任务管理器告诉我它获得了 10-20 个 GDI 对象。GDIView 告诉我这些主要是位图和 DC，尽管这些仅占“GDI Total”的大部分；“All GDI”的数量是“GDI Total”的 3-4 倍。

我如何确定这是否是 gummi 中的错误（我认为这不太可能，因为我认为 gummi 在重新聚焦/重绘方面没有任何作用）、cairo、poppler 或 gtk？我如何去寻找错误在哪里，以便我可以提交错误报告？（或者，如果这是 gtk/cairo/poppler 的已知错误，有人可以指出错误报告吗？）

正如在其他线程（ Win32Exception: Operation completed successfully ）中提到的，windows 将进程限制为 10,000 个句柄，并且我有 gummi 段错误，大概是从达到这个限制。此类事件的 gdb 回溯复制如下。

(gummi.exe:14008): Gdk-WARNING **: gdkgc-win32.c:830: SaveDC failed: The operation completed successfully.

(gummi.exe:14008): Gdk-WARNING **: gdkgc-win32.c:970: RestoreDC failed: The operation completed successfully.
pnc=: T
Program received signal SIGSEGV, Segmentation fault.
0x68de05bd in cairo_image_surface_get_data ()
   from d:\opt\gtk\bin\libcairo-2.dll
(gdb) bt
#0  0x68de05bd in cairo_image_surface_get_data ()
   from d:\opt\gtk\bin\libcairo-2.dll
#1  0x6c38d268 in _gdk_pixmap_new ()
   from d:\opt\gtk\bin\libgdk-win32-2.0-0.dll
#2  0x62d453a5 in draw_extension ()
   from d:\opt\gtk\lib\gtk-2.0\2.10.0\engines\libwimp.dll
#3  0x0155fdb6 in gtk_notebook_draw_tab ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#4  0x015601d7 in gtk_notebook_expose ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#5  0x0153b916 in _gtk_marshal_BOOLEAN__BOXED ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#6  0x63a451f9 in g_closure_invoke ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#7  0x63a54512 in signal_emit_unlocked_R ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#8  0x63a5b614 in g_signal_emit_valist ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#9  0x63a5b962 in g_signal_emit ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#10 0x0165b557 in gtk_widget_event_internal ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#11 0x014b6b0d in gtk_container_propagate_expose ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#12 0x014b6b48 in gtk_container_expose_child ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#13 0x0147c026 in gtk_box_forall ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#14 0x014b5436 in gtk_container_forall ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#15 0x014b5611 in gtk_container_expose ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#16 0x0153b916 in _gtk_marshal_BOOLEAN__BOXED ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#17 0x63a451f9 in g_closure_invoke ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#18 0x63a54512 in signal_emit_unlocked_R ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#19 0x63a5b614 in g_signal_emit_valist ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#20 0x63a5b962 in g_signal_emit ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#21 0x0165b557 in gtk_widget_event_internal ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#22 0x014b6b0d in gtk_container_propagate_expose ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#23 0x014b6b48 in gtk_container_expose_child ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#24 0x0156a555 in gtk_paned_forall ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#25 0x014b5436 in gtk_container_forall ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#26 0x014b5611 in gtk_container_expose ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#27 0x0156a894 in gtk_paned_expose ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#28 0x0153b916 in _gtk_marshal_BOOLEAN__BOXED ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#29 0x63a451f9 in g_closure_invoke ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#30 0x63a54512 in signal_emit_unlocked_R ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#31 0x63a5b614 in g_signal_emit_valist ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#32 0x63a5b962 in g_signal_emit ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#33 0x0165b557 in gtk_widget_event_internal ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#34 0x014b6b0d in gtk_container_propagate_expose ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#35 0x014b6b48 in gtk_container_expose_child ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#36 0x0147c026 in gtk_box_forall ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#37 0x014b5436 in gtk_container_forall ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#38 0x014b5611 in gtk_container_expose ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#39 0x0153b916 in _gtk_marshal_BOOLEAN__BOXED ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#40 0x63a451f9 in g_closure_invoke ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#41 0x63a54512 in signal_emit_unlocked_R ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#42 0x63a5b614 in g_signal_emit_valist ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#43 0x63a5b962 in g_signal_emit ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#44 0x0165b557 in gtk_widget_event_internal ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#45 0x014b6b0d in gtk_container_propagate_expose ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#46 0x014b6b48 in gtk_container_expose_child ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#47 0x014b5436 in gtk_container_forall ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#48 0x014b5611 in gtk_container_expose ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#49 0x0153b916 in _gtk_marshal_BOOLEAN__BOXED ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#50 0x63a452c2 in g_closure_invoke ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#51 0x63a54512 in signal_emit_unlocked_R ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#52 0x63a5b614 in g_signal_emit_valist ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#53 0x63a5b962 in g_signal_emit ()
   from d:\opt\gtk\bin\libgobject-2.0-0.dll
#54 0x0165b557 in gtk_widget_event_internal ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#55 0x0153a22f in gtk_main_do_event ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#56 0x6c3641dd in _gdk_window_process_updates_recurse ()
   from d:\opt\gtk\bin\libgdk-win32-2.0-0.dll
#57 0x6c35f6b6 in gdk_window_process_updates_internal ()
   from d:\opt\gtk\bin\libgdk-win32-2.0-0.dll
#58 0x6c361497 in gdk_window_process_all_updates ()
   from d:\opt\gtk\bin\libgdk-win32-2.0-0.dll
#59 0x6c361507 in gdk_window_update_idle ()
   from d:\opt\gtk\bin\libgdk-win32-2.0-0.dll
#60 0x6c34137c in gdk_threads_dispatch ()
   from d:\opt\gtk\bin\libgdk-win32-2.0-0.dll
#61 0x685eb167 in g_main_context_dispatch ()
   from d:\opt\gtk\bin\libglib-2.0-0.dll
#62 0x685eb90d in g_main_context_iterate.clone.5 ()
   from d:\opt\gtk\bin\libglib-2.0-0.dll
#63 0x685ebd9d in g_main_loop_run ()
   from d:\opt\gtk\bin\libglib-2.0-0.dll
#64 0x01539038 in gtk_main ()
   from d:\opt\gtk\bin\libgtk-win32-2.0-0.dll
#65 0x0040950e in gui_main (builder=0x33f5090) at gui/gui-main.c:281
#66 0x00428378 in main (argc=1, argv=0x3f56c8) at main.c:157
(gdb)

我正在使用来自 gtk+-bundle_2.24.10-20120208_win32 的 cairo 和 gtk+，来自 http://www.gtk.org/download/win32.php 的 32 位下载，http : //ftp.gnome.org/pub/ gnome/binaries/win32/gtk+/2.24/gtk+-bundle_2.24.10-20120208_win32.zip。该项目还使用了 gtksourceview-2.10.0、libpng-1.5.10、openjpeg-1.5.0、poppler-0.18.4 和其他一些库，它们都是从 MinGW 下的源代码构建的，我认为与这些库无关图形。

4

1 回答 1

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GTK 团队不会忽视这种问题，这很可能是一个 gummi 错误。检查该程序的暴露事件信号处理程序，并确保它不会在不释放它们的情况下分配东西。

GDI 泄漏确实很棘手（在 MFC 中存在问题，问题出在应用程序上）。

更新： 似乎我错了，这是GTK bug 671538。您还可以在此线程上找到一些建议。

于 2012-04-27T10:20:37.063 回答