[vbox-dev] Minimalist OpenGL program crashing

[Otacílio]

Hi Michael,

Yes, I located the exactly line where the seg fault is raised. I did a 
full report with a description and a stacktrace. Is reported here: 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214396

After debugging gdb says that the exception is raised on line 679 of file /usr/ports/emulators/virtualbox-ose-additions/work/VirtualBox-5.1.8/src/VBox/GuestHost/OpenGL/util/hash.c

void *crHashtableSearch( const CRHashTable *h, unsigned long key )
{
     unsigned int index = crHash( key );
     CRHashNode *temp;
#ifdef CHROMIUM_THREADSAFE
BUG IS HERE  =======>  crLockMutex((CRmutex *)&h->mutex);
#endif
     for ( temp = h->buckets[index]; temp; temp = temp->next )
     {
         if ( temp->key == key )
             break;
     }
#ifdef CHROMIUM_THREADSAFE
     crUnlockMutex((CRmutex *)&h->mutex);
#endif
     if ( !temp )
     {
         return NULL;
     }
     return temp->data;
}


(gdb) backtrace
#0  check_and_init_mutex (mutex=0x20c8, m=0x7fffffffe650) at /usr/src/lib/libthr/thread/thr_mutex.c:588
#1  0x0000000802923506 in __pthread_mutex_lock (mutex=0x20c8) at /usr/src/lib/libthr/thread/thr_mutex.c:743
#2  0x0000000801e531f1 in crHashtableSearch (h=0x0, key=56623106) at /usr/ports/emulators/virtualbox-ose-additions/work/VirtualBox-5.1.8/src/VBox/GuestHost/OpenGL/util/hash.c:679
#3  0x000000080088f1cb in glXMakeCurrent (dpy=0x80481f000, drawable=56623106, ctx=0x1f4) at /usr/ports/emulators/virtualbox-ose-additions/work/VirtualBox-5.1.8/src/VBox/Additions/common/crOpenGL/glx.c:694
#4  0x00000008010ce5be in fgSetWindow () from /usr/local/lib/libglut.so.3
#5  0x00000008010cc44c in fgDestroyWindow () from /usr/local/lib/libglut.so.3
#6  0x00000008010cc895 in fgDestroyStructure () from /usr/local/lib/libglut.so.3
#7  0x00000008010c9841 in fgDeinitialize () from /usr/local/lib/libglut.so.3
#8  0x0000000801b9add6 in __cxa_finalize (dso=<value optimized out>) at /usr/src/lib/libc/stdlib/atexit.c:237
#9  0x0000000801b2a141 in exit (status=0) at /usr/src/lib/libc/stdlib/exit.c:72
#10 0x0000000000400976 in _start ()
#11 0x0000000800622000 in ?? ()
#12 0x0000000000000000 in ?? ()



But, if you prefer I can report in a vbox bugtracking also.

Cheers
-Otacílio

Em 21/11/2016 08:25, Michael Thayer escreveu:
> Hello Otacílio,
>
> 10.11.2016 13:07, Otacílio wrote:
>> I'm using this minimalist program to test OpenGL. When running on a true
>> machine (FreeBSD 11, clang 3.8.0) this program runs fine. But, when
>> compiling and running in a Virtualbox guest with
>> virtualbox-ose-additions-5.1.8 installed (FreeBSD 11, clang 3.8.0,
>> OpenGL enabled)  I'm getting a core dump when the program exits. So its
>> not clear to me if this is a FreeBSD port problem or not. So, please, I
>> wold like ask you to compile and running in your's guest machine running
>> Linux or FreeBSD and report to me the results.
>
> I can confirm that this affects Linux guests too.  Unfortunately we do 
> not have time to investigate X11 guest 3D issues for the foreseeable 
> future, so your best bet is probably to debug it yourself.  If you can 
> clearly locate the problem (as in understanding it) chances are good 
> that we will fix it.
>
> Regards,
>
> Michael
>
>>
>> Program:
>>
>> #include <stdio.h>
>> #include <GL/glew.h>
>> #include <GL/gl.h>
>> #include <GL/glu.h>
>> #include <GL/glut.h>
>> #include <GL/glext.h>
>>
>> int main(int argc, char **argv) {
>>
>>         glutInit(&argc, argv);
>>         glutCreateWindow("GLUT");
>>         glewInit();
>>
>>         printf("OpenGL version supported by this platform (%s): \n",
>>         glGetString(GL_VERSION));
>>
>>         fprintf(stdout, "Exiting...\n");
>>         fflush(stdout);
>>
>>         return 0;
>> }
>>
>>
>> Compiler command:
>>
>> cc -I/usr/local/include -L/usr/local/lib -o testegl testegl.c -lGL
>> -lGLEW -lGLU   -lglut
>>
>>
>> My results in a guest machine:
>>
>> [ota at nostromo /usr/home/ota/Desktop]$ ./testegl
>> OpenGL version supported by this platform (2.1 Chromium 1.9):
>> Exiting...
>> Segmentation fault (imagem do núcleo gravada)
>>
>>
>> Thanks a lot!
>>
>> []'s
>>
>> -Otacilio
>>
>> _______________________________________________
>> vbox-dev mailing list
>> vbox-dev at virtualbox.org
>> https://www.virtualbox.org/mailman/listinfo/vbox-dev
>

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