Commit e0d6421c authored by Hiroshi Yamauchi's avatar Hiroshi Yamauchi
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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.

Cherry pick commit c1276c83.

Bug: 16854263
Change-Id: Ide2545d92bcafd3a095ac7f0c89c5b43d6dd78de
parent fa9c8ec3
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