tree eca2720bdc759d2e4b5058bc022f595303ebb971
parent 30b65201aa9c953433dbde1288e9b1b883042cd1
author Andreas Gampe <agampe@google.com> 1400177766 -0700
committer Andreas Gampe <agampe@google.com> 1400182364 -0700

ART: Fix MonitorExit code on ARM

We do not emit barriers on non-SMP systems. But on ARM, we have
places that need to conditionally execute, which is done through
an IT instruction. The guide of said instruction thus changes
between SMP and non-SMP systems.

To cleanly approach this, change the API so that GenMemBarrier
returns whether it generated an instruction. ARM will have to
query the result and update any dependent IT.

Throw a build system error if TARGET_CPU_SMP is not set.

Fix runtime/Android.mk to work with new multilib host.

Bug: 14989275
Change-Id: I9e611b770e8a1cd4ca19367d7dae0573ec08dc61