tree f0fc789f6d271b57058cff9518f44793db175f92
parent 1a1888f801e1efc4232a3e709d959232659af0c6
author Ryan Prichard <rprichard@google.com> 1580859975 -0800
committer Ryan Prichard <rprichard@google.com> 1583557472 -0800

Rewrite __cxa_atexit / __cxa_finalize

Simplify:
 - Use a single memory-mapped region to hold the table of destructors.
   Double its capacity each time it is expanded.
 - Add a recompaction pass at the end of __cxa_finalize that shifts
   entries forward and uses madvise to clean pages.

Bug: http://b/148055738
Test: bionic-unit-tests
Change-Id: Ieb9da2b88640a8a5277d217b43826b5b7e246781