In the runtime itself: https://android-review.googlesource.com/c/platform/art/+/580003/10 https://android-review.googlesource.com/c/platform/art/+/580... CL is

In the runtime itself: https://android-review.googlesource.com/c/platform/art/+/580003/10 https://android-review.googlesource.com/c/platform/art/+/580... CL is abandoned but it appears to have just be split up into smaller changes, so that should still give a good idea of the approach being used.