1678808 - many crashes on Windows 7 with mostly AMD processors in code related to shaders

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect, P2)

Description

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

There are several frequent crashers on Windows 7 with AMD processors for 84.0b3 which often mention shaders. This points to the enabling of WebRender on ANGLE (bug 1677818) as regressor.

Crashes:

• [@ RtlpReportHeapFailure | MD4Transform]: 146 crashes / 53 installations at the moment
• [@ RtlFreeHeap | HeapFree | ILShader::~ILShader]: 83 / 28
• [@ webrender_bindings::moz2d_renderer::{{impl}}::prepare_resources]: 78 / 23
• [@ RtlpReportHeapFailure | RtlUlonglongByteSwap | HeapFree | ILShader::~ILShader]: 73 / 21
• [@ RtlpReportHeapFailure | zzz_AsmCodeRange_End | HeapFree | atidxx64.dll | CCLSAllocator::Free]: 34 / 10
• [@ R600Workaround::UpdateFetch4State]: 340 / 75

Needinfoing Julien for a backout in 78.0b4.

Comment 1

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Updates for the beta channel have been turned off for this.

Comment 2

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

The change from bug 1677818 got backed out from beta. This will ship with 84.0b4 on Monday.

Leaving the bug open for Matt to decide if the crashes shall be investigated here or in a different bug.

Comment 3

[Ryan VanderMeulen [:RyanVM]]

Optimistically calling this fixed by backout for 84.

Comment 4

[Matt Woodrow (:mattwoodrow)]

Looks like this is mostly R600 devices, with 8.56.1.15/16.

We already blocklist 8.56.1.15 for non-WebRender acceleration, but recently allowed it for WR.

8.56.1.16 appears to be available for layers acceleration and not crashing afaict.

Comment 5

[Julien Cristau [:jcristau]]

What's the next step here for 85?

Comment 6

[Jeff Muizelaar [:jrmuizel]]

Bug 1679468.