Mercurial > hg > graal-compiler
diff src/share/vm/gc_implementation/g1/g1BlockOffsetTable.hpp @ 1886:72a161e62cc4
6991377: G1: race between concurrent refinement and humongous object allocation
Summary: There is a race between the concurrent refinement threads and the humongous object allocation that can cause the concurrent refinement threads to corrupt the part of the BOT that it is being initialized by the humongous object allocation operation. The solution is to do the humongous object allocation in careful steps to ensure that the concurrent refinement threads always have a consistent view over the BOT, region contents, and top. The fix includes some very minor tidying up in sparsePRT.
Reviewed-by: jcoomes, johnc, ysr
| author | tonyp |
|---|---|
| date | Sat, 16 Oct 2010 17:12:19 -0400 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
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--- a/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.hpp Mon Oct 18 15:01:41 2010 -0700 +++ b/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.hpp Sat Oct 16 17:12:19 2010 -0400 @@ -436,6 +436,8 @@ } void check_all_cards(size_t left_card, size_t right_card) const; + + virtual void set_for_starts_humongous(HeapWord* new_end); }; // A subtype of BlockOffsetArray that takes advantage of the fact @@ -484,4 +486,6 @@ HeapWord* block_start_unsafe(const void* addr); HeapWord* block_start_unsafe_const(const void* addr) const; + + virtual void set_for_starts_humongous(HeapWord* new_end); };