Add logic to collect dirty objects as roots
authoroliver@apple.com <oliver@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc>
Thu, 29 Sep 2011 22:52:45 +0000 (22:52 +0000)
committeroliver@apple.com <oliver@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc>
Thu, 29 Sep 2011 22:52:45 +0000 (22:52 +0000)
commita648a293cae07e30ccf6646cff51052f44fa35d5
treea9ffa5be8e3758380a6d354c0024ef738fd8405a
parent596a9499abe2d122a96b98b9f194414806a8ec6c
Add logic to collect dirty objects as roots
https://bugs.webkit.org/show_bug.cgi?id=69100

Reviewed by Geoff Garen.

This gives us the ability to walk all the MarkedBlocks in an
AllocationSpace and collect the dirty objects, and then use
them as GC roots.

* dfg/DFGJITCodeGenerator.cpp:
(JSC::DFG::JITCodeGenerator::markCellCard):
* dfg/DFGJITCodeGenerator32_64.cpp:
(JSC::DFG::JITCodeGenerator::markCellCard):
* heap/AllocationSpace.cpp:
   Tidy up the write barrier logic a bit
(JSC::MarkedBlock::gatherDirtyObjects):
(JSC::TakeIfDirty::returnValue):
(JSC::TakeIfDirty::TakeIfDirty):
(JSC::TakeIfDirty::operator()):
(JSC::AllocationSpace::gatherDirtyObjects):
* heap/AllocationSpace.h:
* heap/CardSet.h:
(JSC::::isCardMarked):
(JSC::::clearCard):
* heap/Heap.cpp:
(JSC::Heap::markRoots):
* heap/Heap.h:
(JSC::Heap::writeBarrier):
* heap/MarkStack.cpp:
(JSC::SlotVisitor::visitChildren):
* heap/MarkedBlock.h:
(JSC::MarkedBlock::setDirtyObject):
(JSC::MarkedBlock::addressOfCardFor):
* heap/SlotVisitor.h:
* jit/JITPropertyAccess.cpp:
(JSC::JIT::emitWriteBarrier):
   Tidy the write barrier a bit

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@96372 268f45cc-cd09-0410-ab3c-d52691b4dbfc
13 files changed:
Source/JavaScriptCore/ChangeLog
Source/JavaScriptCore/dfg/DFGJITCodeGenerator.cpp
Source/JavaScriptCore/dfg/DFGJITCodeGenerator32_64.cpp
Source/JavaScriptCore/heap/AllocationSpace.cpp
Source/JavaScriptCore/heap/AllocationSpace.h
Source/JavaScriptCore/heap/CardSet.h
Source/JavaScriptCore/heap/Heap.cpp
Source/JavaScriptCore/heap/Heap.h
Source/JavaScriptCore/heap/HeapRootVisitor.h
Source/JavaScriptCore/heap/MarkStack.cpp
Source/JavaScriptCore/heap/MarkedBlock.h
Source/JavaScriptCore/heap/SlotVisitor.h
Source/JavaScriptCore/jit/JITPropertyAccess.cpp