tree 6a056073b680ed6fe25fb406e5f2b316b991ee3e
parent a411fc65d1fc4c2c1c44d5d0860b31a018b8c9fd
author Yabin Cui <yabinc@google.com> 1521076582 -0700
committer Christopher Ferris <cferris@google.com> 1521268687 -0700

Always set the sp reg to the cfa for DWARF.

There are a few places where it is assumed that this register is
set to the cfa value when interpreting DWARF information.

Add a testcase for unwinding art_quick_osr_stub on ARM.

Bug: 73954823

Test: Ran libunwindstack/libbacktrace unit tests.
Test: Random debuggerd -b of process on a hikey.
Test: Ran the 137 art test on host.
Change-Id: Ida6ccdc38c3cfeea6b57fe861a0cc127b150b790