1682344 - Bring up the mochitest-a11y suite under tsan

Status: RESOLVED FIXED

(Core :: Sanitizers, task)

Description

[Aria Beingessner [:Gankra]]

Notes from decoder:

• test sets are defined here: taskcluster/ci/test/test-sets.yml
• if you locally add mochitest-a11y there, then ./mach try fuzzy --full should have it
• mochitest definitions are in taskcluster/ci/test/mochitest.yml. I dont know if a11y inherits the default mochitest settings. it might be necessary to increase chunking, runtime and machine type for tsan in there. you have to check what happens if you do a try push as is (e.g. what machine type it is using, should be the same as mochitest-media)

there are essentially 3 things that usually happen

• additional tsan failures. file them, add suppressions, easy
• intermittents. and the problem here is that with tsan, some rare intermittents tend to get really frequent or even perma... might require test disabling
• timeouts. here it can get a little messy. sometimes, tests are just obviously not good for TSan and most of the time already disabled for asan and other slow platforms. thats the easy one. sometimes though, there is maybe 1 test consuming a ton of ram, and it kills the entire job. that can be a little tricky to debug (it usually appears as repeated blue tasks, maybe even purple afterwards)

see mochitest-media bug for example

Comment 1

[Aria Beingessner [:Gankra]]

Attachment: Bug 1682344 - enable mochitest-a11y under tsan. r?decoder

Comment 2

[Aria Beingessner [:Gankra]]

Attachment: Bug 1682344 - turn on e10s for mochitest-a11y. r?decoder

Depends on D99718

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/f43ec0c80257
enable mochitest-a11y under tsan. r=decoder

Comment 4

[Cristina Coroiu [:ccoroiu]]

https://hg.mozilla.org/mozilla-central/rev/f43ec0c80257