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6711316: Open source the Garbage-First garbage collector

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First mercurial integration of the code for the Garbage-First garbage collector.

Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
This commit is contained in:
Y. Srinivas Ramakrishna 2008-06-05 15:57:56 -07:00
parent 39463bb3fc
commit 18f3386a98
215 changed files with 36088 additions and 1249 deletions
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13
hotspot/src/share/vm/memory/modRefBarrierSet.hpp
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@ -31,6 +31,13 @@ class Generation;
class ModRefBarrierSet: public BarrierSet {
public:
ModRefBarrierSet() { _kind = BarrierSet::ModRef; }
bool is_a(BarrierSet::Name bsn) {
return bsn == BarrierSet::ModRef;
}
// Barriers only on ref writes.
bool has_read_ref_barrier() { return false; }
bool has_read_prim_barrier() { return false; }
@ -85,8 +92,10 @@ public:
bool clear = false,
bool before_save_marks = false) = 0;
// Causes all refs in "mr" to be assumed to be modified.
virtual void invalidate(MemRegion mr) = 0;
// Causes all refs in "mr" to be assumed to be modified. If "whole_heap"
// is true, the caller asserts that the entire heap is being invalidated,
// which may admit an optimized implementation for some barriers.
virtual void invalidate(MemRegion mr, bool whole_heap = false) = 0;
// The caller guarantees that "mr" contains no references. (Perhaps it's
// objects have been moved elsewhere.)