1362319 - Firefox hangs on uniform buffer WebGL 2 conformance tests on ARM Mali-G71 MP8 (on a Huawei P10 Plus)

Status: NEW

(Core :: Graphics: CanvasWebGL, enhancement, P3)

Description

[Jukka Jylänki]

Testing the WebGL 2 conformance suite on current FF Nightly for Android,

https://www.khronos.org/registry/webgl/sdk/tests/webgl-conformance-tests.html?version=2.0.1

on a http://www.gsmarena.com/huawei_p10_plus-8515.php

when attempting to run any of the uniform buffers related tests, the phone operation hangs in some async meaning of the word hang: panning and scrolling the page works, but it's no longer possible to click on any of the buttons to run any other tests.

What makes this look different from a JavaScript hang is that attempting to kill the browser process via the Android activity switcher fails - the FF Nightly activity goes away from the UI, but trying to relaunch FF Nightly from the start menu does not work, and a bit later there is a message "Nightly isn't responding. Do you want to close it?" that appears.

Given that the hang occurs on all WebGL 2 conformance tests which have the word uniform buffers in them, e.g. on

https://www.khronos.org/registry/webgl/sdk/tests/deqp/functional/gles3/uniformbuffers/single_basic_type.html?webglVersion=2&quiet=0

and

https://www.khronos.org/registry/webgl/sdk/tests/conformance2/buffers/one-large-uniform-buffer.html?webglVersion=2&quiet=0

it suggests the hang would be something specific to UBOs.