This matches behaviour of asan. sanitizer_common/TestCases/malloc_hook.cpp
should've caught this- but hwasan was on XFAIL.
Differential Revision: https://reviews.llvm.org/D151580
Previously lsan would not invoke hooks on reallocations.
An accompanying regression test is included in sanitizer_common.
This change also moves hook calls to a location where subsequent
calls (via an external caller) to __sanitizer_get_allocated_size
via hooks will return a valid size.
This allows a faster version of __sanitizer_get_allocated_size
to be implemented, which can skip checks.
Test to ensure RunFreeHooks' call order will come with
__sanitizer_get_allocated_size_fast
Differential Revision: https://reviews.llvm.org/D151175
