When e.g. running rootston under X11 it would otherwise crash when
closing rootston like:
#0 0x00007f0197da7327 in wl_list_remove () at /usr/lib/x86_64-linux-gnu/libwayland-server.so.0
#1 0x000056306fcee7fb in handle_destroy (listener=0x5630723a2948, data=0x5630723a5d20) at ../rootston/layer_shell.c:273
#2 0x00007f019800a552 in wlr_signal_emit_safe (signal=0x5630723a5e30, data=0x5630723a5d20) at ../util/signal.c:29
#3 0x00007f0197fef808 in layer_surface_destroy (surface=0x5630723a5d20) at ../types/wlr_layer_shell.c:169
#4 0x00007f0197ff0001 in client_handle_destroy (resource=0x56307229c4c0) at ../types/wlr_layer_shell.c:371
#5 0x00007f0197da2f30 in () at /usr/lib/x86_64-linux-gnu/libwayland-server.so.0
#6 0x00007f0197da77f9 in () at /usr/lib/x86_64-linux-gnu/libwayland-server.so.0
#7 0x00007f0197da301d in wl_client_destroy () at /usr/lib/x86_64-linux-gnu/libwayland-server.so.0
#8 0x00007f0197da30d8 in () at /usr/lib/x86_64-linux-gnu/libwayland-server.so.0
#9 0x00007f0197da4c12 in wl_event_loop_dispatch () at /usr/lib/x86_64-linux-gnu/libwayland-server.so.0
#10 0x00007f0197da344a in wl_display_run () at /usr/lib/x86_64-linux-gnu/libwayland-server.so.0
#11 0x000056306fcef069 in main (argc=3, argv=0x7ffd22032528) at ../rootston/main.c:83
since the output_destroy got already removed in handle_output_destroy.
With -O2:
../rootston/desktop.c: In function ‘desktop_surface_at’:
../rootston/desktop.c:714:18: error: ‘roots_output’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
if ((surface = layer_surface_at(roots_output,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
&roots_output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM],
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ox, oy, sx, sy))) {
~~~~~~~~~~~~~~~
==32557==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x000000425f96 bp 0x7fff8ac19de0 sp 0x7fff8ac19d20 T0)
==32557==The signal is caused by a READ memory access.
==32557==Hint: address points to the zero page.
#0 0x425f95 in roots_seat_set_focus ../rootston/seat.c:737
#1 0x40bcd6 in roots_cursor_press_button ../rootston/cursor.c:272
#2 0x40c1f7 in roots_cursor_handle_button ../rootston/cursor.c:298
#3 0x42179b in handle_cursor_button ../rootston/seat.c:58
#4 0x7f1651062367 in wlr_signal_emit_safe ../util/signal.c:29
#5 0x7f165101b532 in handle_pointer_button ../types/wlr_cursor.c:344
#6 0x7f1651062367 in wlr_signal_emit_safe ../util/signal.c:29
#7 0x7f1650ff633b in handle_pointer_button ../backend/libinput/pointer.c:85
#8 0x7f1650ff5291 in wlr_libinput_event ../backend/libinput/events.c:215
#9 0x7f1650ff3990 in wlr_libinput_readable ../backend/libinput/backend.c:35
#10 0x7f1650d88c11 in wl_event_loop_dispatch (/lib64/libwayland-server.so.0+0x9c11)
#11 0x7f1650d87449 in wl_display_run (/lib64/libwayland-server.so.0+0x8449)
#12 0x418e90 in main ../rootston/main.c:81
#13 0x7f164ff7ef29 in __libc_start_main (/lib64/libc.so.6+0x20f29)
#14 0x405829 in _start (/home/shared/wayland/wlroots/build/rootston/rootston+0x405829)
introduced by #680
Guido Günther
Drew DeVault
emersion
Dominique Martinet
Bruno
Tancredi Orlando
Danilo Spinella
Orestis Floros
Tony Crisci