tree d7c461bba27009dd8304a2da1b0cea5b031a1a7b
parent 743600d5ae654817a5d81179fb480816e0cd139d
author Orion Hodson <oth@google.com> 1559490303 +0100
committer Orion Hodson <oth@google.com> 1559662447 +0000

ART: Avoid shared cache lines for JIT code allocations

Dual view JIT exhibits some hygiene issues that causes crashes on
devices with 32-bit kernels.

This change makes JIT code allocations cache aligned. This is based on
guidance in the v7_coherent_user_range() that says "it is assumed that
the Icache does not read data from the write buffer".

Bug: 132205399

Test: >2000 boot tests on affected device with no zygote crashes.
Test: No crashes running ART JIT benchmarks on go/lem
Test: No failures with Treehugger

Change-Id: I901e2e5c07b9502876b33f572be63ec1dca19cbe