Mercurial > hg > truffle
diff src/share/vm/includeDB_core @ 1716:be3f9c242c9d
6948538: CMS: BOT walkers can fall into object allocation and initialization cracks
Summary: GC workers now recognize an intermediate transient state of blocks which are allocated but have not yet completed initialization. blk_start() calls do not attempt to determine the size of a block in the transient state, rather waiting for the block to become initialized so that it is safe to query its size. Audited and ensured the order of initialization of object fields (klass, free bit and size) to respect block state transition protocol. Also included some new assertion checking code enabled in debug mode.
Reviewed-by: chrisphi, johnc, poonam
| author | ysr |
|---|---|
| date | Mon, 16 Aug 2010 15:58:42 -0700 |
| parents | 126ea7725993 |
| children | d5d065957597 8b10f48633dc |
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--- a/src/share/vm/includeDB_core Sat Aug 14 00:47:52 2010 -0700 +++ b/src/share/vm/includeDB_core Mon Aug 16 15:58:42 2010 -0700 @@ -225,7 +225,6 @@ arrayOop.cpp symbolOop.hpp arrayOop.hpp oop.hpp -arrayOop.hpp universe.hpp arrayOop.hpp universe.inline.hpp assembler.cpp assembler.hpp @@ -236,7 +235,6 @@ assembler.cpp os.hpp assembler.hpp allocation.hpp -assembler.hpp allocation.inline.hpp assembler.hpp debug.hpp assembler.hpp growableArray.hpp assembler.hpp oopRecorder.hpp @@ -330,7 +328,7 @@ blockOffsetTable.cpp iterator.hpp blockOffsetTable.cpp java.hpp blockOffsetTable.cpp oop.inline.hpp -blockOffsetTable.cpp space.hpp +blockOffsetTable.cpp space.inline.hpp blockOffsetTable.cpp universe.hpp blockOffsetTable.hpp globalDefinitions.hpp @@ -338,6 +336,7 @@ blockOffsetTable.hpp virtualspace.hpp blockOffsetTable.inline.hpp blockOffsetTable.hpp +blockOffsetTable.inline.hpp safepoint.hpp blockOffsetTable.inline.hpp space.hpp bytecode.cpp bytecode.hpp @@ -1807,7 +1806,7 @@ generateOopMap.hpp universe.inline.hpp generation.cpp allocation.inline.hpp -generation.cpp blockOffsetTable.hpp +generation.cpp blockOffsetTable.inline.hpp generation.cpp cardTableRS.hpp generation.cpp collectedHeap.inline.hpp generation.cpp copy.hpp @@ -3436,7 +3435,7 @@ perfMemory_<os_family>.cpp resourceArea.hpp perfMemory_<os_family>.cpp vmSymbols.hpp -permGen.cpp blockOffsetTable.hpp +permGen.cpp blockOffsetTable.inline.hpp permGen.cpp cSpaceCounters.hpp permGen.cpp collectedHeap.inline.hpp permGen.cpp compactPermGen.hpp @@ -3805,7 +3804,7 @@ sizes.hpp allocation.hpp sizes.hpp globalDefinitions.hpp -space.cpp blockOffsetTable.hpp +space.cpp blockOffsetTable.inline.hpp space.cpp copy.hpp space.cpp defNewGeneration.hpp space.cpp genCollectedHeap.hpp @@ -3835,7 +3834,6 @@ space.hpp watermark.hpp space.hpp workgroup.hpp -space.inline.hpp blockOffsetTable.inline.hpp space.inline.hpp collectedHeap.hpp space.inline.hpp safepoint.hpp space.inline.hpp space.hpp