tree bcd8ef79f60e93a132d81af8bfa804e006db2d8a
parent 8b62dc0f993d0445401655fc274e5225498fa81c
author Hiroshi Yamauchi <yamauchi@google.com> 1407432437 -0700
committer Hiroshi Yamauchi <yamauchi@google.com> 1407432808 -0700

Fix a SIGSEGV at background-to-foreground collector transition.

The mem map that's used to create the backup main rosalloc space is
set to PROT_NONE by the compaction and the rosalloc space creation
attempts to write the debug magic number in the first page.

This is a debug build only issue.

Bug: 16854263
Change-Id: I3cc6b7288ee53c006366bb428fb245a909bc3db5