• oliver@apple.com's avatar
    2011-05-19 Oliver Hunt <oliver@apple.com> · a3b44328
    oliver@apple.com authored
            Reviewed by Gavin Barraclough.
    
            Add guard pages to each end of the memory region used by the fixedvm allocator
            https://bugs.webkit.org/show_bug.cgi?id=61150
    
            Add mechanism to notify the OSAllocator that pages at either end of an
            allocation should be considered guard pages.  Update PageReservation,
            PageAllocation, etc to handle this.
    
            * JavaScriptCore.exp:
            * jit/ExecutableAllocatorFixedVMPool.cpp:
            (JSC::FixedVMPoolAllocator::FixedVMPoolAllocator):
            * wtf/OSAllocator.h:
            * wtf/OSAllocatorPosix.cpp:
            (WTF::OSAllocator::reserveUncommitted):
            (WTF::OSAllocator::reserveAndCommit):
            * wtf/PageAllocation.h:
            (WTF::PageAllocation::PageAllocation):
            * wtf/PageAllocationAligned.h:
            (WTF::PageAllocationAligned::PageAllocationAligned):
            * wtf/PageBlock.h:
            (WTF::PageBlock::PageBlock):
            * wtf/PageReservation.h:
            (WTF::PageReservation::reserve):
            (WTF::PageReservation::reserveWithGuardPages):
                Add a new function to make a reservation that will add guard
                pages to the ends of an allocation.
            (WTF::PageReservation::PageReservation):
    
    git-svn-id: http://svn.webkit.org/repository/webkit/trunk@86906 268f45cc-cd09-0410-ab3c-d52691b4dbfc
    a3b44328
JavaScriptCore.exp 25 KB