[Mono-dev] Webbrowser in mono hangs (Roberto Bufadel)

Jo Shields directhex at apebox.org
Fri Jul 13 12:13:23 UTC 2012 

On 13/07/12 13:00, mono-devel-list-request at lists.ximian.com wrote:
> Message: 1
> Date: Wed, 11 Jul 2012 23:31:37 -0400
> From: Roberto Bufadel <jjzd2w at gmail.com>
> To: mono-devel-list at lists.ximian.com.
> Subject: [Mono-dev] Webbrowser in mono  hangs
> Message-ID: <201207112331.38201.jjzd2w at gmail.com>
> Content-Type: Text/Plain;  charset="us-ascii"
>
>
>     
> Im triying to crear a litle aplication to suse  a object
> system.windows.forms.webbrowser  , the Thing is  while i'm debug a method
> Navegate(Uri url) this process  have a exit  and the debugin is a lot extrange
> well Please !! Help me!!
> the code in the aplication is
> http://www.java2s.com/Tutorial/CSharp/0460__GUI-Windows-
> Forms/AsimpleBrowser.htm
>
> Dump
> Loaded assembly:
> /home/rbs/Projects/DemoNetMono/DestopAplicationWinforms/bin/Debug/DestopAplicationWinforms.exe
> Loaded assembly:
> /usr/lib/mono/gac/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
> [External]
> Loaded assembly: /usr/lib/mono/gac/System/2.0.0.0__b77a5c561934e089/System.dll
> [External]
> Loaded assembly:
> /usr/lib/mono/gac/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
> [External]
> Loaded assembly:
> /usr/lib/mono/gac/Accessibility/2.0.0.0__b03f5f7f11d50a3a/Accessibility.dll
> [External]
> Resolved pending breakpoint at
> '/home/rbs/Projects/DemoNetMono/DestopAplicationWinforms/windowsForm.cs:15' to
> Void WebBrowserDemo:Main () [0x00005].
> Loaded assembly:
> /usr/lib/mono/gac/Mono.Posix/2.0.0.0__0738eb9f132ed756/Mono.Posix.dll
> [External]
> Loaded assembly:
> /usr/lib/mono/gac/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
> [External]
> Loaded assembly:
> /usr/lib/mono/gac/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
> [External]
> Loaded assembly:
> /usr/lib/mono/gac/Mono.WebBrowser/2.0.0.0__0738eb9f132ed756/Mono.WebBrowser.dll
> [External]
>
> Native stacktrace:
>
>          /usr/bin/mono() [0x80e1dfc]
>          /usr/bin/mono() [0x8060114]
>          [0xb77ff40c]
>          /usr/lib/libgluezilla.so(_ZN13BrowserWindow13SetDimensionsEjiiii+0x7b)
> [0xb6010ccb]
>          /usr/lib/libgluezilla.so(_ZN6Widget6ResizeEjj+0x4e) [0xb601379e]
>          /usr/lib/libgluezilla.so(_ZN6Widget6ResizeEP6Params+0x2e) [0xb601726e]
>          /usr/lib/libgluezilla.so(+0xdf03) [0xb6013f03]
>          /lib/libglib-2.0.so.0() [0x43c985d1]
>          /lib/libglib-2.0.so.0(g_main_context_dispatch+0x1df) [0x43c9c5bf]
>          /lib/libglib-2.0.so.0() [0x43c9cd30]
>          /lib/libglib-2.0.so.0(g_main_loop_run+0x187) [0x43c9d457]
>          /usr/lib/libgtk-x11-2.0.so.0(gtk_main+0xaf) [0x4368b8df]
>          /usr/lib/libgluezilla.so(_Z11gtk_startupPv+0x52) [0xb6015ec2]
>          /lib/libglib-2.0.so.0() [0x43cc4535]
>          /lib/libpthread.so.0() [0x43bb6a2e]
>          /lib/libc.so.6(clone+0x5e) [0x43af581e]
>
> Debug info from gdb:
>
> Mono support loaded.
> [Thread debugging using libthread_db enabled]
> [New Thread 0xb6005b70 (LWP 2765)]
> [New Thread 0xb6fbeb70 (LWP 2760)]
> [New Thread 0xb70bfb70 (LWP 2759)]
> 0xb77ff424 in __kernel_vsyscall ()
>    Id   Target Id         Frame
>    4    Thread 0xb70bfb70 (LWP 2759) "mono" 0xb77ff424 in __kernel_vsyscall ()
>    3    Thread 0xb6fbeb70 (LWP 2760) "mono" 0xb77ff424 in __kernel_vsyscall ()
>    2    Thread 0xb6005b70 (LWP 2765) "mono" 0xb77ff424 in __kernel_vsyscall ()
> * 1    Thread 0xb77db8f0 (LWP 2757) "mono" 0xb77ff424 in __kernel_vsyscall ()
>
> Thread 4 (Thread 0xb70bfb70 (LWP 2759)):
> #0  0xb77ff424 in __kernel_vsyscall ()
> #1  0x43bbc475 in sem_wait@@GLIBC_2.1 () from /lib/libpthread.so.0
> #2  0x0820e828 in mono_sem_wait ()
> #3  0x08151fed in ?? ()
> #4  0x081db90e in ?? ()
> #5  0x08208cf2 in ?? ()
> #6  0x0822a21d in ?? ()
> #7  0x43bb6a2e in start_thread () from /lib/libpthread.so.0
> #8  0x43af581e in clone () from /lib/libc.so.6
>
> Thread 3 (Thread 0xb6fbeb70 (LWP 2760)):
> #0  0xb77ff424 in __kernel_vsyscall ()
> #1  0x43bbd3d8 in recv () from /lib/libpthread.so.0
> #2  0x0810029a in ?? ()
> #3  0x0810403e in ?? ()
> #4  0x08208cf2 in ?? ()
> #5  0x0822a21d in ?? ()
> #6  0x43bb6a2e in start_thread () from /lib/libpthread.so.0
> #7  0x43af581e in clone () from /lib/libc.so.6
>
> Thread 2 (Thread 0xb6005b70 (LWP 2765)):
> #0  0xb77ff424 in __kernel_vsyscall ()
> #1  0x43bbd0cb in read () from /lib/libpthread.so.0
> #2  0x080e1fdf in ?? ()
> #3  0x08060114 in ?? ()
> #4  <signal handler called>
> #5  0xb6010ccb in BrowserWindow::SetDimensions(unsigned int, int, int, int,
> int) () from /usr/lib/libgluezilla.so
> #6  0xb601379e in Widget::Resize(unsigned int, unsigned int) () from
> /usr/lib/libgluezilla.so
> #7  0xb601726e in Widget::Resize(Params*) () from /usr/lib/libgluezilla.so
> #8  0xb6013f03 in ?? () from /usr/lib/libgluezilla.so
> #9  0x43c985d1 in ?? () from /lib/libglib-2.0.so.0
> #10 0x43c9c5bf in g_main_context_dispatch () from /lib/libglib-2.0.so.0
> #11 0x43c9cd30 in ?? () from /lib/libglib-2.0.so.0
> #12 0x43c9d457 in g_main_loop_run () from /lib/libglib-2.0.so.0
> #13 0x4368b8df in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
> #14 0xb6015ec2 in gtk_startup(void*) () from /usr/lib/libgluezilla.so
> #15 0x43cc4535 in ?? () from /lib/libglib-2.0.so.0
> #16 0x43bb6a2e in start_thread () from /lib/libpthread.so.0
> #17 0x43af581e in clone () from /lib/libc.so.6
>
> Thread 1 (Thread 0xb77db8f0 (LWP 2757)):
> #0  0xb77ff424 in __kernel_vsyscall ()
> #1  0x43bba14c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
> #2  0x43c6fb70 in ?? () from /lib/libglib-2.0.so.0
> #3  0x43c7028f in g_async_queue_pop () from /lib/libglib-2.0.so.0
> #4  0xb60140aa in Widget::BeginInvoke(Params*, int) () from
> /usr/lib/libgluezilla.so
> #5  0xb601415c in Widget::BeginInvoke(Params*) () from
> /usr/lib/libgluezilla.so
> #6  0xb60161bf in gluezilla_resize () from /usr/lib/libgluezilla.so
> #7  0xb5716b9e in ?? ()
> #8  0xb5716af8 in ?? ()
> #9  0xb57167b4 in ?? ()
> #10 0xb57165cc in ?? ()
> #11 0xb5716515 in ?? ()
> #12 0xb5716488 in ?? ()
> #13 0xb571640c in ?? ()
> #14 0xb6c915c8 in ?? ()
> #15 0xb6ce6938 in ?? ()
> #16 0xb6ce68c8 in ?? ()
> #17 0xb70de1b8 in ?? ()
> #18 0xb70de321 in ?? ()
> #19 0x08064d5f in ?? ()
> #20 0x081a5e70 in mono_runtime_invoke ()
> #21 0x081a8c67 in mono_runtime_exec_main ()
> #22 0x080bb552 in mono_main ()
> #23 0x08059a5f in ?? ()
> #24 0x43a343f3 in __libc_start_main () from /lib/libc.so.6
> #25 0x08059b25 in ?? ()
> Backtrace stopped: Not enough registers or memory available to unwind further
>
> =================================================================
> Got a SIGSEGV while executing native code. This usually indicates
> a fatal error in the mono runtime or one of the native libraries
> used by your application.
> =================================================================
>

Support for using Gecko (Firefox) as a back-end in 
System.Windows.Forms.WebBrowser is basically dead, due to intentional 
breakage in the Gecko embedding API around Firefox 4 time.

There's an alternative Webkit backend, but it's incomplete.

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