1291157 - Intermittent dom/media/tests/mochitest/test_peerConnection_multiple_captureStream_canvas_2d.html | application crashed [@ nvwgf2umx.dll + 0x2d2f91]

Status: RESOLVED WORKSFORME

(Core :: Graphics: Layers, defect, P3)

Description

[Treeherder Bug Filer]

Filed by: philringnalda [at] gmail.com

https://treeherder.mozilla.org/logviewer.html#?job_id=1261026&repo=autoland

http://archive.mozilla.org/pub/firefox/tinderbox-builds/autoland-win64-debug/1470085551/autoland_win8_64-debug_test-mochitest-media-bm110-tests1-windows-build39.txt.gz

Comment 1

[Byron Campen [:bwc]]

Looks like a null pointer crash in the layers code.

Comment 2

[Jerry Shih[:jerry] (UTC+8) (inactive)]

The crash is at:

void
CompositorD3D11::PrepareViewport(const gfx::IntSize& aSize,
                                 const gfx::Matrix4x4& aProjection,
                                 float aZNear, float aZFar)
{
  D3D11_VIEWPORT viewport;
  viewport.MaxDepth = aZFar;
  viewport.MinDepth = aZNear;
  viewport.Width = aSize.width;
  viewport.Height = aSize.height;
  viewport.TopLeftX = 0;
  viewport.TopLeftY = 0;

  mContext->RSSetViewports(1, &viewport); //<=== assume the crash is because mContext is nullptr.

  memcpy(&mVSConstants.projection, &aProjection._11, sizeof(mVSConstants.projection));
}

https://hg.mozilla.org/integration/autoland/annotate/b2a6aaf59783cecf8cde63fe51fbd65e14b026df/gfx/layers/d3d11/CompositorD3D11.cpp#l1381

But if mContext is nullptr, the crash should be here. We use mContext at this line.
https://hg.mozilla.org/integration/autoland/annotate/b2a6aaf59783cecf8cde63fe51fbd65e14b026df/gfx/layers/d3d11/CompositorD3D11.cpp#l1205

The PrepareViewport() is called in this line.
https://hg.mozilla.org/integration/autoland/annotate/b2a6aaf59783cecf8cde63fe51fbd65e14b026df/gfx/layers/d3d11/CompositorD3D11.cpp#l1207

Comment 3

[BMO Automation]

Bulk assigning P3 to all open intermittent bugs without a priority set in Firefox components per bug 1298978.

Comment 4

[Ryan VanderMeulen [:RyanVM]]

This stopped around the same time as bug 1289761, which probably isn't a coincidence.

Comment 5

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/releases/mozilla-beta/rev/558394541d48