Mercurial > hg > truffle
diff src/share/vm/gc_interface/collectedHeap.hpp @ 342:37f87013dfd8
6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
author | ysr |
---|---|
date | Thu, 05 Jun 2008 15:57:56 -0700 |
parents | ba764ed4b6f2 |
children | 1ee8caae33af |
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--- a/src/share/vm/gc_interface/collectedHeap.hpp Wed Jun 04 13:51:09 2008 -0700 +++ b/src/share/vm/gc_interface/collectedHeap.hpp Thu Jun 05 15:57:56 2008 -0700 @@ -364,10 +364,8 @@ // 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 @@ // 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