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Gracefully handle inert wl_output resources

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Closes: https://github.com/swaywm/wlroots/issues/2088
This commit is contained in:
Simon Ser 2020-03-28 20:56:27 +01:00 committed by Drew DeVault
parent 13db99b0f8
commit 7516a98167
4 changed files with 35 additions and 11 deletions
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5
include/wlr/types/wlr_output.h
View file

@ -369,6 +369,11 @@ bool wlr_output_set_gamma(struct wlr_output *output, size_t size,
const uint16_t *r, const uint16_t *g, const uint16_t *b);
bool wlr_output_export_dmabuf(struct wlr_output *output,
struct wlr_dmabuf_attributes *attribs);
/**
* Returns the wlr_output matching the provided wl_output resource. If the
* resource isn't a wl_output, it aborts. If the resource is inert (because the
* wlr_output has been destroyed), NULL is returned.
*/
struct wlr_output *wlr_output_from_resource(struct wl_resource *resource);
/**
* Locks the output to only use rendering instead of direct scan-out. This is

7
types/wlr_gamma_control_v1.c
View file

@ -161,6 +161,13 @@ static void gamma_control_manager_get_gamma_control(struct wl_client *client,
wl_resource_set_implementation(gamma_control->resource, &gamma_control_impl,
gamma_control, gamma_control_handle_resource_destroy);
if (output == NULL) {
wl_resource_set_user_data(gamma_control->resource, NULL);
zwlr_gamma_control_v1_send_failed(gamma_control->resource);
free(gamma_control);
return;
}
wl_signal_add(&output->events.destroy,
&gamma_control->output_destroy_listener);
gamma_control->output_destroy_listener.notify =

12
types/wlr_screencopy_v1.c
View file

@ -379,13 +379,19 @@ static void capture_output(struct wl_client *wl_client,
wl_client_post_no_memory(wl_client);
return;
}
wl_resource_set_implementation(frame->resource, &frame_impl, frame,
frame_handle_resource_destroy);
if (output == NULL) {
wl_resource_set_user_data(frame->resource, NULL);
zwlr_screencopy_frame_v1_send_failed(frame->resource);
free(frame);
return;
}
frame->client = client;
client->ref++;
wl_resource_set_implementation(frame->resource, &frame_impl, frame,
frame_handle_resource_destroy);
wl_list_insert(&client->manager->frames, &frame->link);
wl_list_init(&frame->output_precommit.link);

22
types/wlr_xdg_output_v1.c
View file

@ -96,6 +96,20 @@ static void output_manager_handle_get_xdg_output(struct wl_client *client,
struct wlr_output_layout *layout = manager->layout;
struct wlr_output *output = wlr_output_from_resource(output_resource);
struct wl_resource *xdg_output_resource = wl_resource_create(client,
&zxdg_output_v1_interface, wl_resource_get_version(resource), id);
if (!xdg_output_resource) {
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(xdg_output_resource, &output_implementation,
NULL, output_handle_resource_destroy);
if (output == NULL) {
wl_list_init(wl_resource_get_link(xdg_output_resource));
return;
}
struct wlr_output_layout_output *layout_output =
wlr_output_layout_get(layout, output);
assert(layout_output);
@ -109,14 +123,6 @@ static void output_manager_handle_get_xdg_output(struct wl_client *client,
}
assert(xdg_output);
struct wl_resource *xdg_output_resource = wl_resource_create(client,
&zxdg_output_v1_interface, wl_resource_get_version(resource), id);
if (!xdg_output_resource) {
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(xdg_output_resource, &output_implementation,
NULL, output_handle_resource_destroy);
wl_list_insert(&xdg_output->resources,
wl_resource_get_link(xdg_output_resource));