1299941 - valgrind reports invalid writes running dom/canvas/test/webgl-conf/generated/test_conformance__extensions__oes-texture-float-linear.html

Status: NEW

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

Description

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Running dom/canvas/test/webgl-conf/generated/test_conformance__extensions__oes-texture-float-linear.html under valgrind, I see a number of invalid writes reported, following by other signs of memory corruption and a crash.

Comment 1

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Attachment: initial invalid write messages, first run

Comment 2

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Attachment: initial invalid write messages, second run

Comment 3

[Milan Sreckovic [:milan] (needinfo for best results)]

Vincent, in the context of bug 1285531, can you take a look at this and see if it helps us?  May have to setup valgrind and reproduce what David is seeing.

Comment 4

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

This is also reproducable just by loading the file dom/canvas/test/webgl-conf/checkout/conformance/extensions/oes-texture-float-linear.html , which allows skipping all the mochitest/marionnette junk (which is extremely slow).

Comment 5

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

... though I see this only on my machine with proprietary nvidia drivers, and not on the machine with Intel drivers...

Comment 6

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

This also happens on other tests, such as:
oes-texture-float-linear.html                   (the original test reported)
oes-texture-float-with-canvas.html
oes-texture-float-with-image-data.html:
oes-texture-float.html
oes-texture-half-float-linear.html
oes-texture-half-float-with-canvas.html
oes-texture-half-float-with-image-data.html
oes-texture-half-float.html

(I tried a few others, but couldn't get it to happen elsewhere.)

Comment 7

[Milan Sreckovic [:milan] (needinfo for best results)]

David, what's your machine/driver configuration?

Comment 8

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Ubuntu 16.04, with the driver nvidia-304-updates version 304.131-0ubuntu3.  about:support says the GPU is "NVIDIA Corporation - Quadro NVS 295/PCIe/SSE2" with driver version "3.3.0 NVIDIA 304.131".

Comment 9

[Vincent Liu[:vliu]]

(In reply to Milan Sreckovic [:milan] from comment #3)
> Vincent, in the context of bug 1285531, can you take a look at this and see
> if it helps us?  May have to setup valgrind and reproduce what David is
> seeing.

Sure. I will try to setup environment.

Comment 10

[Vincent Liu[:vliu]]

I tried those tests in Ubuntu 14.04, with the GT210 driver nvidia-304-updates version 304.131 under valgrind. The thing is I can't reproduce crash issues by many times. I followed [1] to setup and run command under valgrind.

[1]: https://developer.mozilla.org/en-US/docs/Mozilla/Testing/Valgrind