tree ab4cf915ea5399b42c8dbf304d752e110f905ea0
parent 9b1e90ef5c8c026253099066e8414803a9880bf9
author Orion Hodson <oth@google.com> 1536056911 +0100
committer Orion Hodson <oth@google.com> 1537522543 +0100

ART: Dual mapping of JIT code pages

Add support for a two mappings of JIT code pages. One mapping is used
for executing code, the other for updating it. The latter mapping is
never executable.

Fallback to the existing regime when the required support is missing.

No longer allocate mappings for JIT code when cache exists only for
profiling purposes.

Bug: 66095511
Bug: 111199492
Test: art/test.py --host
Test: art/test.py --64 (angler - single view)
Test: art/test.py --64 (other - dual view)
Test: walleye boots

Change-Id: I9920534c81cbf16f375f1dd554d5952716bf3253