ysr@777: /*
sla@5237:  * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
ysr@777:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777:  *
ysr@777:  * This code is free software; you can redistribute it and/or modify it
ysr@777:  * under the terms of the GNU General Public License version 2 only, as
ysr@777:  * published by the Free Software Foundation.
ysr@777:  *
ysr@777:  * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ysr@777:  * version 2 for more details (a copy is included in the LICENSE file that
ysr@777:  * accompanied this code).
ysr@777:  *
ysr@777:  * You should have received a copy of the GNU General Public License version
ysr@777:  * 2 along with this work; if not, write to the Free Software Foundation,
ysr@777:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
ysr@777:  *
ysr@777:  */
ysr@777: 
stefank@2314: #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP
stefank@2314: #define SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP
stefank@2314: 
stefank@2314: #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
stefank@2314: #include "gc_implementation/g1/heapRegion.hpp"
stefank@2314: #include "memory/genMarkSweep.hpp"
stefank@2314: #include "memory/generation.hpp"
stefank@2314: #include "memory/universe.hpp"
stefank@2314: #include "oops/markOop.hpp"
stefank@2314: #include "oops/oop.hpp"
stefank@2314: #include "runtime/timer.hpp"
stefank@2314: #include "utilities/growableArray.hpp"
stefank@2314: 
ysr@777: class ReferenceProcessor;
ysr@777: 
ysr@777: // G1MarkSweep takes care of global mark-compact garbage collection for a
ysr@777: // G1CollectedHeap using a four-phase pointer forwarding algorithm.  All
ysr@777: // generations are assumed to support marking; those that can also support
ysr@777: // compaction.
ysr@777: //
ysr@777: // Class unloading will only occur when a full gc is invoked.
sjohanss@7131: class G1PrepareCompactClosure;
ysr@777: 
ysr@777: class G1MarkSweep : AllStatic {
ysr@777:   friend class VM_G1MarkSweep;
ysr@777:   friend class Scavenge;
ysr@777: 
ysr@777:  public:
ysr@777: 
ysr@777:   static void invoke_at_safepoint(ReferenceProcessor* rp,
ysr@777:                                   bool clear_all_softrefs);
ysr@777: 
sla@5237:   static STWGCTimer* gc_timer() { return GenMarkSweep::_gc_timer; }
sla@5237:   static SerialOldTracer* gc_tracer() { return GenMarkSweep::_gc_tracer; }
sla@5237: 
ysr@777:  private:
ysr@777: 
ysr@777:   // Mark live objects
ysr@777:   static void mark_sweep_phase1(bool& marked_for_deopt,
ysr@777:                                 bool clear_all_softrefs);
ysr@777:   // Calculate new addresses
ysr@777:   static void mark_sweep_phase2();
ysr@777:   // Update pointers
ysr@777:   static void mark_sweep_phase3();
ysr@777:   // Move objects to new positions
ysr@777:   static void mark_sweep_phase4();
ysr@777: 
ysr@777:   static void allocate_stacks();
sjohanss@7131:   static void prepare_compaction();
sjohanss@7131:   static void prepare_compaction_work(G1PrepareCompactClosure* blk);
sjohanss@7131: };
sjohanss@7131: 
sjohanss@7131: class G1PrepareCompactClosure : public HeapRegionClosure {
sjohanss@7131:  protected:
sjohanss@7131:   G1CollectedHeap* _g1h;
sjohanss@7131:   ModRefBarrierSet* _mrbs;
sjohanss@7131:   CompactPoint _cp;
sjohanss@7131:   HeapRegionSetCount _humongous_regions_removed;
sjohanss@7131: 
sjohanss@7131:   virtual void prepare_for_compaction(HeapRegion* hr, HeapWord* end);
sjohanss@7131:   void prepare_for_compaction_work(CompactPoint* cp, HeapRegion* hr, HeapWord* end);
sjohanss@7131:   void free_humongous_region(HeapRegion* hr);
sjohanss@7131:   bool is_cp_initialized() const { return _cp.space != NULL; }
sjohanss@7131: 
sjohanss@7131:  public:
sjohanss@7131:   G1PrepareCompactClosure() :
sjohanss@7131:     _g1h(G1CollectedHeap::heap()),
sjohanss@7131:     _mrbs(_g1h->g1_barrier_set()),
sjohanss@7131:     _humongous_regions_removed() { }
sjohanss@7131: 
sjohanss@7131:   void update_sets();
sjohanss@7131:   bool doHeapRegion(HeapRegion* hr);
ysr@777: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP