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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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12
hotspot/src/share/vm/gc_interface/collectedHeap.hpp
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@ -364,10 +364,8 @@ class CollectedHeap : public CHeapObj {
// Can a compiler initialize a new object without store barriers?
// This permission only extends from the creation of a new object
// via a TLAB up to the first subsequent safepoint.
virtual bool can_elide_tlab_store_barriers() const {
guarantee(kind() < CollectedHeap::G1CollectedHeap, "else change or refactor this");
return true;
}
virtual bool can_elide_tlab_store_barriers() const = 0;
// If a compiler is eliding store barriers for TLAB-allocated objects,
// there is probably a corresponding slow path which can produce
// an object allocated anywhere. The compiler's runtime support
@ -379,12 +377,10 @@ class CollectedHeap : public CHeapObj {
// Can a compiler elide a store barrier when it writes
// a permanent oop into the heap? Applies when the compiler
// is storing x to the heap, where x->is_perm() is true.
virtual bool can_elide_permanent_oop_store_barriers() const;
virtual bool can_elide_permanent_oop_store_barriers() const = 0;
// Does this heap support heap inspection (+PrintClassHistogram?)
virtual bool supports_heap_inspection() const {
return false; // Until RFE 5023697 is implemented
}
virtual bool supports_heap_inspection() const = 0;
// Perform a collection of the heap; intended for use in implementing
// "System.gc". This probably implies as full a collection as the