tree 1ab630e5a8a041710198bd3b0c4a030e33f61348
parent 18149b6764437eeb88d0ab78e565ec9cb2384779
author Christopher Ferris <cferris@google.com> 1504732528 -0700
committer Christopher Ferris <cferris@google.com> 1504742924 -0700

Fix UnwindTest repeatability.

- Rewrite some of the UnwindTest tests to properly wait for the process
  to be ready.
- Add a TestScopedPidReaper to make sure that fork process get killed even
  if the test fails. Add this to all tests that fail.
- Create a quiesce function to be used by all of the tests that will
  wait after attaching to a process.

Bug: 65287279

Test: Ran unit tests on hikey960 board and on host repeatedly.
Change-Id: I57084120396f34d8dfb852f3d814bef2056f1b54