0x0000003f7f4de037 in ioctl () from /lib64/libc.so.6                            
Missing separate debuginfos, use: debuginfo-install xorg-x11-server-Xorg-1.5.3-4
(gdb) bt                                                                        
#0  0x0000003f7f4de037 in ioctl () from /lib64/libc.so.6                        
#1  0x00007fe62fbd723d in drm_intel_gem_bo_start_gtt_access (bo=0x2c60270,      
    write_enable=<value optimized out>) at intel_bufmgr_gem.c:788               
#2  0x00007fe61f24d741 in intelFinish (ctx=<value optimized out>)               
    at intel_context.c:535                                                      
#3  0x00007fe6304d6da4 in __glXDisp_CopySubBufferMESA (                         
    cl=<value optimized out>, pc=<value optimized out>) at glxcmds.c:1609       
#4  0x00007fe6304d5f62 in __glXDisp_VendorPrivate (cl=0x293a610,                
    pc=0xda7fc7c "\227\020\b") at glxcmds.c:2249                                
#5  0x00007fe6304da3cf in __glXDispatch (client=0x28dd420) at glxext.c:522      
#6  0x000000000042ad64 in Dispatch () at dispatch.c:437                         
#7  0x00000000004248ed in main (argc=8, argv=0x7fff38b4e5a8,                    
    envp=<value optimized out>) at main.c:396                                   
(gdb)