tree 44e5635479372bd16ab77e6e43321e682fd8f150
parent 513322113905556cdbcfced272698ec633d76de5
author Austin Eng <enga@chromium.org> 1589558832 +0000
committer Commit Bot service account <commit-bot@chromium.org> 1589558832 +0000

DawnTest: Gather adapters on environment creation for filtering backends

This moves the creation of the Instance and Adapter discover to
environment creation. It allows programatically filtering test
parameterizations based on what is available on the system instead of
relying on what is enabled at compile time.

Because of an issue with the Vulkan validation layers, the instance and
adapters are created twice. Once in environment creation, and once on
environment set up. The Vulkan validation layers use static global
mutexes which are unsafe when Chromium's test launcher forks the
launcher process between environment creation and SetUp.

Bug: dawn:396
Change-Id: Id79f0d274331e4ba95f75b2ca4e896ad0f7a31a8
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/21762
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>