tree b97d703b79aa2d0d0e3edf85e0e0948fbe8578df
parent 5d24e2e4770112f33fdbe679d7ebc6f45b31f52c
author Evgenii Stepanov <eugenis@google.com> 1629241161 -0700
committer Evgenii Stepanov <eugenis@google.com> 1630454087 -0700

Switch hwasan from fork to vfork.

Remove the special case for "hwaddress" sanitizer (HWASan) that makes it
use fork instead of vfork (which is the default). The case was
introduced earlier because of the missing support for vfork in HWASan.

HWASan has been fixed more than 2 years ago in
https://reviews.llvm.org/D58533. Moreover, a bug in the fork support has
been discovered and fixed upstream in https://reviews.llvm.org/D108063,
but it is not in the current Android toolchain yet.

Switching back to vfork makes the code faster, avoids the hwasan bug,
and reduces the diff in behavior between hwasan and regular builds.

Bug: 196623668
Test: CtsLibcoreTestCases (no new failures)
Test: manual
Merged-In: I15d32829806f605d5599d776753bc32df0494661
Change-Id: I15d32829806f605d5599d776753bc32df0494661
(cherry picked from commit c88ebe712180722b17c17175f0aa90a002eec8f6)