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# fb19400d 17-Feb-2021 Dmitry Vyukov <dvyukov@google.com>

tsan: fix mmap_lots test

If tsan runtime will try to allocate something during exit handling,
the allocation will fail because there is no VA whatsoever.
It's observed to fail with the following err

tsan: fix mmap_lots test

If tsan runtime will try to allocate something during exit handling,
the allocation will fail because there is no VA whatsoever.
It's observed to fail with the following error in some cases:
failed to allocate 0x1000 (4096) bytes of DTLS_NextBlock.
So terminate the process immediately.

Reviewed-in: https://reviews.llvm.org/D96874

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# 0984b8de 15-Feb-2021 Dmitry Vyukov <dvyukov@google.com>

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 regi

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

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