tree 17fde709095f46eff040585e694b621676e5d0c0
parent 654f01cd509ca11eae22177d4e764f1241fb3a53
author Vladimir Marko <vmarko@google.com> 1622536015 +0100
committer Vladimir Marko <vmarko@google.com> 1622551850 +0000

Avoid race on Thread::tlsPtr_::top_handle_scope.

Require mutator lock for that field and update tests to hold
the mutator lock when needed. This prevents GC thread that
executes a thread roots flip on behalf of suspended threads
from racing against construction or destruction of handle
scopes by those threads and possibly seeing invalid values.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Bug: 189439174
Change-Id: I268a0ef6e5aa838347956febca0d3b6e02fe3ae5