[mesa 19.1.6]dEQP-EGL.functional.sharing.gles2.multithread.random.* failed

[renchenglei]

Two dEQP-EGL.functional.sharing.gles2.multithread.random. cases failed on Android 10 with mesa 19.1.6.

dEQP-EGL.functional.sharing.gles2.multithread.random.textures.gen_delete#15
dEQP-EGL.functional.sharing.gles2.multithread.random.programs.link#5

With mesa 19.0.6, we could reproduce one of them, and met gpu hang.

dEQP-EGL.functional.sharing.gles2.multithread.random.textures.gen_delete#15

The other one seems a new regression compared with mesa 19.0.6.

dEQP-EGL.functional.sharing.gles2.multithread.random.programs.link#5

Upstream master branch also could reproduce this two issues.
Steps to reproduce this issue(run with cts packages):

run cts -m CtsDeqpTestCases -t dEQP-EGL.functional.sharing.gles2.multithread.random.textures.gen_delete#15
run cts -m CtsDeqpTestCases -t dEQP-EGL.functional.sharing.gles2.multithread.random.programs.link#5

[tpalli]

This test seems to randomly pass or fail (fails much more often though):
dEQP-EGL.functional.sharing.gles2.multithread.random.programs.link#5

When it fails, the process seems to crash but does not provide any meaningful backtrace in the adb log :/