GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.5) 7.11.1 Copyright (C) 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/lib/xorg/Xorg...Reading symbols from /usr/lib/debug/.build-id/20/38b7355319eeae7c5c7b700238ee9194eee841.debug...done. done. (gdb) attach 1468 Attaching to program: /usr/lib/xorg/Xorg, process 1468 [New LWP 1563] [New LWP 1566] [New LWP 1567] [New LWP 1568] [New LWP 1569] [New LWP 1570] [New LWP 1571] [New LWP 1573] [New LWP 1674] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". 0x00007fbbb15fda13 in epoll_wait () at ../sysdeps/unix/syscall-template.S:84 84 ../sysdeps/unix/syscall-template.S: No such file or directory. (gdb) c Continuing. Thread 1 "Xorg" received signal SIGSEGV, Segmentation fault. 0x0000000000000000 in ?? () (gdb) bt full #0 0x0000000000000000 in ?? () No symbol table info available. #1 0x00007fbbacc022d5 in ms_dirty_update (timeout=0x7fff3d058c04, screen=0x557a635ca2d0) at ../../../../../../../hw/xfree86/drivers/modesetting/driver.c:636 ms = 0x557a632f3a70 region = ent = 0x557a641d5ff0 #2 msBlockHandler (pScreen=0x557a635ca2d0, timeout=0x7fff3d058c04) at ../../../../../../../hw/xfree86/drivers/modesetting/driver.c:680 ms = #3 0x0000557a61028def in BlockHandler (pTimeout=pTimeout@entry=0x7fff3d058c04) at ../../../../dix/dixutils.c:394 i = 0 j = #4 0x0000557a6117f6c3 in WaitForSomething (are_ready=) at ../../../../os/WaitFor.c:219 i = timeout = 0 pollerr = were_ready = 0 timer_is_running = 1 #5 0x0000557a610240c1 in Dispatch () at ../../../../dix/dispatch.c:422 result = start_tick = #6 0x0000557a610283b8 in dix_main (argc=12, argv=0x7fff3d058de8, envp=) at ../../../../dix/main.c:287 i = alwaysCheckForInput = {0, 1} #7 0x00007fbbb1516830 in __libc_start_main (main=0x557a610122f0
, argc=12, argv=0x7fff3d058de8, init=, fini=, rtld_fini=, stack_end=0x7fff3d058dd8) at ../csu/libc-start.c:291 result = unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 3414915741589965645, 93984101835520, 140734217162208, 0, 0, 8822147049567554381, 8856213588412205901}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0xc, 0x557a610122f0
}, data = {prev = 0x0, cleanup = 0x0, canceltype = 12}}} not_first_call = #8 0x0000557a61012329 in _start () No symbol table info available. (gdb) p passcount print printf pwd python-interactive path print-object ptype python (gdb) print ent No symbol "ent" in current context. (gdb) qc Continuing. Thread 1 "Xorg" received signal SIGABRT, Aborted. 0x00007fbbb152b428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54 54 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory. (gdb) quic Continuing. Couldn't get registers: No such process. Couldn't get registers: No such process. Couldn't get registers: No such process. (gdb) [Thread 0x7fbb9fabf700 (LWP 1674) exited] [Thread 0x7fbba06df700 (LWP 1573) exited] [Thread 0x7fbba0ee0700 (LWP 1571) exited] [Thread 0x7fbba16e1700 (LWP 1570) exited] [Thread 0x7fbba1ee2700 (LWP 1569) exited] [Thread 0x7fbba26e3700 (LWP 1568) exited] [Thread 0x7fbba2ee4700 (LWP 1567) exited] [Thread 0x7fbba36e5700 (LWP 1566) exited] [Thread 0x7fbba4027700 (LWP 1563) exited] Program terminated with signal SIGABRT, Aborted. The program no longer exists. The program is not being run. (gdb) quit