bug#70352: Fwd: Re: bug#70352: 29.3.50; emacs-pgtk: possible leak of virtual memory

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 17 Apr 2024 15:30:11 +0800
> From:  Yang Yingchao via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> On Mon, Apr 15 2024, Yang Yingchao wrote:
> 
> >
> > FYI:
> > I tested this in two window managers (Hyprland & Sway), and found that the same issue exists.
> 
> 
> I'm not familiar with the GTK toolkit, but it seems that the creation
> and destruction of surfaces are not properly paired.
> 
> 
> I added breakpoints to `_gdk_wayland_display_create_shm_surface()` and
> `gdk_wayland_cairo_surface_destroy()`, then executed steps 2 and 3. I
> found that `_gdk_wayland_display_create_shm_surface()` is called 3
> times, but `gdk_wayland_cairo_surface_destroy()` is only called 2 times.
> 
> I'm not sure if this is related...
> 
> ```
> 70:Thread 1 "emacs" hit Breakpoint 6, _gdk_wayland_display_create_shm_surface (display=<optimized out>,
> 125:Thread 1 "emacs" hit Breakpoint 5, gdk_wayland_cairo_surface_destroy (p=0x555b2d87c2a0)
> 137:Thread 1 "emacs" hit Breakpoint 6, _gdk_wayland_display_create_shm_surface (display=<optimized out>,
> 153:Thread 1 "emacs" hit Breakpoint 6, _gdk_wayland_display_create_shm_surface (display=<optimized out>,
> 181:Thread 1 "emacs" hit Breakpoint 5, gdk_wayland_cairo_surface_destroy (p=0x555b2e33fc40)
> ```

Po Lu, any comments or suggestions?