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river-status: fix crash due to bad alignment

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Using an ArrayList to back the wl_array we need to pass to libwayland
is much safer and avoids this kind of bug.
This commit is contained in:
Isaac Freund 2020-06-16 22:46:29 +02:00
parent c5de1641dc
commit 42f8076cec
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1 changed files with 16 additions and 12 deletions
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28
river/OutputStatus.zig
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@ -57,19 +57,23 @@ fn destroy(wl_client: ?*c.wl_client, wl_resource: ?*c.wl_resource) callconv(.C)
/// Send the current tags of each view on the output to the client. /// Send the current tags of each view on the output to the client.
pub fn sendViewTags(self: Self) void { pub fn sendViewTags(self: Self) void {
var view_tags: c.wl_array = undefined; var view_tags = std.ArrayList(u32).init(util.allocator);
c.wl_array_init(&view_tags); defer view_tags.deinit();
var it = ViewStack(View).iterator(self.output.views.first, std.math.maxInt(u32)); var it = ViewStack(View).iterator(self.output.views.first, std.math.maxInt(u32));
while (it.next()) |node| { while (it.next()) |node|
const ptr = c.wl_array_add(&view_tags, @sizeOf(u32)) orelse { view_tags.append(node.view.current_tags) catch {
c.wl_resource_post_no_memory(self.wl_resource); c.wl_resource_post_no_memory(self.wl_resource);
Log.Error.log("out of memory", .{}); Log.Error.log("out of memory", .{});
return; return;
}; };
const ptr_u32 = util.voidCast(u32, ptr);
ptr_u32.* = node.view.current_tags; var wl_array = c.wl_array{
} .size = view_tags.items.len,
c.zriver_output_status_v1_send_view_tags(self.wl_resource, &view_tags); .alloc = view_tags.capacity,
.data = view_tags.items.ptr,
};
c.zriver_output_status_v1_send_view_tags(self.wl_resource, &wl_array);
} }
/// Send the currently focused tags of the output to the client. /// Send the currently focused tags of the output to the client.