850510 - [layers-refactoring] ocean of cairo assertions in the gfx branch

Status: RESOLVED FIXED

(Core :: Graphics: Layers, defect)

Description

[Nicolas Silva [:nical]]

Attachment: gdb backtrace

On the gfx branch we hit this assertion continuously:

Assertion failed at /home/nico/dev/mozilla/gfx/gfx/cairo/cairo/src/cairo-device.c:436: device->mutex_depth > 0

The assertion is not fatal and when I set a break point on it I get the attached back trace.

Comment 1

[Nicolas Silva [:nical]]

This assertion is only hit when off main thread compositing is enabled

Comment 2

[Karl Tomlinson (:karlt)]

Is cairo compiled with multi-thread support?

If not, nothing should be using cairo from another thread.

Comment 3

[Nicolas Silva [:nical]]

The assertion was happening on the main thread, not sure if something was using cairo somewhere else. I haven't been able to reproduce this for a while and the code is changing fast on the refactoring branch so i'll close this bug.