<html>
<head>
<base href="https://bugzilla.gnome.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - wayland: possible infinite loop in gdkwindow-wayland"
href="https://bugzilla.gnome.org/show_bug.cgi?id=759299">759299</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>wayland: possible infinite loop in gdkwindow-wayland
</td>
</tr>
<tr>
<th>Classification</th>
<td>Platform
</td>
</tr>
<tr>
<th>Product</th>
<td>gtk+
</td>
</tr>
<tr>
<th>Version</th>
<td>3.19.x
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>Normal
</td>
</tr>
<tr>
<th>Component</th>
<td>Backend: Wayland
</td>
</tr>
<tr>
<th>Assignee</th>
<td>gtk-bugs@gtk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ofourdan@redhat.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>gtk-bugs@gtk.org
</td>
</tr>
<tr>
<th>CC</th>
<td>rob@robster.org.uk, wayland-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>GNOME version</th>
<td>---
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=317111" name="attach_317111" title="Reproducer program">attachment 317111</a> <a href="attachment.cgi?id=317111&action=edit" title="Reproducer program">[details]</a></span>
Reproducer program
Summary:
The Wayland backend will enter an infinite loop in case of a cycle in transient
relationship (a transient for B and B transient for A).
Steps to reproduce:
1. Save and build the attached program
$ gcc -o cycling-transient cycling-transient.c `pkg-config --libs --cflags
gtk+-3.0`
2. Execute the program under Wayland
Actual result:
The program wil lenter an infinite loop and take 100% CPU
Expected result:
The windows appear normally as in X11
Additional data:
This is because of the following code construct in gdkwindow-wayland.c
while (window)
{
GdkWindowImplWayland *impl;
impl = GDK_WINDOW_IMPL_WAYLAND (window->impl);
window = impl->transient_for;
}
As found in find_grab_input_seat(), get_popup_parent() or
gdk_wayland_window_get_fake_root_coords()</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>