tree a44ea05e077464919ad2ac8a7972a73c5b9946a1
parent 830a168ce61452d5f1a1d590892cd50ff0307bd7
author Dmitry Vyukov <dvyukov@google.com> 1613384748 +0100
committer Copybara-Service <copybara-worker@google.com> 1613725188 -0800

tsan: don't leave unmapped hole in non-app memory

If an app mmaps lots of memory, a user mmap may end up
in the tsan region for traces. Shadow for this range
overlaps with shadow for other user regions.
This causes havok: from false positives to crashes.
Don't leave unmapped holes in the traces region.

Reviewed-in: https://reviews.llvm.org/D96697
GitOrigin-RevId: 0984b8de0b0d5d178a8e6e5de1eb89f29493a89e