-
mrowe@apple.com authored
Prepration for returning memory to the OS on Windows. Track whether a portion of a span of memory was returned to the OS. If it was, ask that it be recommitted before returning it to the application as an allocated region. Reviewed by Oliver Hunt. * wtf/FastMalloc.cpp: (WTF::TCMalloc_PageHeap::New): If the span was decommitted, ask that it be recommitted before returning it. (WTF::TCMalloc_PageHeap::AllocLarge): Ditto. (WTF::TCMalloc_PageHeap::Carve): When splitting a span, ensure that the decommitted state propogates to the two new spans. (WTF::TCMalloc_PageHeap::Delete): When merging a span, ensure that the resulting span is marked as decommitted if any of the spans being merged were marked as decommitted. (WTF::TCMalloc_PageHeap::IncrementalScavenge): Mark as decommitted after releasing the span. (WTF::TCMalloc_Central_FreeList::FetchFromSpans): Add an assertion to catch a decommitted span being returned to the application without first being recommitted. (WTF::TCMalloc_Central_FreeList::Populate): Ditto. * wtf/TCSystemAlloc.cpp: Stub out TCMalloc_SystemCommit. * wtf/TCSystemAlloc.h: git-svn-id: http://svn.webkit.org/repository/webkit/trunk@34756 268f45cc-cd09-0410-ab3c-d52691b4dbfc
20c85fe3