Thread 1 "qemu-system-x86" received signal SIGINT, Interrupt.
0x00007ffff176a9f3 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
(gdb) bt
#0  0x00007ffff176a9f3 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x0000555555e24fbf in qemu_cond_wait_impl (cond=0x555556609ba0 <qemu_work_cond>, mutex=0x5555565e7960 <qemu_global_mutex>, file=0x555555ebfdf0 "/home/doug/code/qemu/cpus-common.c", line=144)
    at /home/doug/code/qemu/util/qemu-thread-posix.c:161
#2  0x0000555555a059df in do_run_on_cpu (cpu=0x555556b11330, func=0x5555557f697e <do_nothing>, data=..., mutex=0x5555565e7960 <qemu_global_mutex>) at /home/doug/code/qemu/cpus-common.c:144
#3  0x0000555555845cfe in run_on_cpu (cpu=0x555556b11330, func=0x5555557f697e <do_nothing>, data=...)
    at /home/doug/code/qemu/cpus.c:1196
#4  0x00005555557f69c8 in tcg_log_global_after_sync (listener=0x555556b50548)
    at /home/doug/code/qemu/exec.c:3077
#5  0x000055555585b3fb in memory_global_after_dirty_log_sync () at /home/doug/code/qemu/memory.c:2618
#6  0x0000555555859c9b in memory_region_snapshot_and_clear_dirty (mr=0x5555577474f0, addr=0, size=1920000, client=0) at /home/doug/code/qemu/memory.c:2126
#7  0x00005555558bd4b1 in vga_draw_graphic (s=0x5555577474e0, full_update=0)
    at /home/doug/code/qemu/hw/display/vga.c:1660
#8  0x00005555558bda70 in vga_update_display (opaque=0x5555577474e0)
    at /home/doug/code/qemu/hw/display/vga.c:1784
#9  0x0000555555c99bb1 in graphic_hw_update (con=0x5555575b96a0)
    at /home/doug/code/qemu/ui/console.c:268
#10 0x0000555555ccfcff in sdl2_2d_refresh (dcl=0x5555582d3a90) at /home/doug/code/qemu/ui/sdl2-2d.c:135
#11 0x0000555555c9d69f in dpy_refresh (s=0x5555578882d0) at /home/doug/code/qemu/ui/console.c:1629
#12 0x0000555555c9991e in gui_update (opaque=0x5555578882d0) at /home/doug/code/qemu/ui/console.c:206
#13 0x0000555555e1f471 in timerlist_run_timers (timer_list=0x5555567c2a50)
    at /home/doug/code/qemu/util/qemu-timer.c:592
#14 0x0000555555e1f51b in qemu_clock_run_timers (type=QEMU_CLOCK_REALTIME)
    at /home/doug/code/qemu/util/qemu-timer.c:606
#15 0x0000555555e1f7da in qemu_clock_run_all_timers () at /home/doug/code/qemu/util/qemu-timer.c:692
#16 0x0000555555e1ff76 in main_loop_wait (nonblocking=0) at /home/doug/code/qemu/util/main-loop.c:524
#17 0x00005555559fc230 in main_loop () at /home/doug/code/qemu/vl.c:1806
#18 0x0000555555a0380c in main (argc=59, argv=0x7fffffffd768, envp=0x7fffffffd948)
    at /home/doug/code/qemu/vl.c:4488
(gdb)