Mercurial > hg > truffle
view src/share/vm/gc_implementation/g1/g1MarkSweep.hpp @ 21738:28943e5044b5
Merge
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Thu, 04 Jun 2015 19:49:45 -0700 |
parents | d35872270666 |
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/* * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP #define SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" #include "gc_implementation/g1/heapRegion.hpp" #include "memory/genMarkSweep.hpp" #include "memory/generation.hpp" #include "memory/universe.hpp" #include "oops/markOop.hpp" #include "oops/oop.hpp" #include "runtime/timer.hpp" #include "utilities/growableArray.hpp" class ReferenceProcessor; // G1MarkSweep takes care of global mark-compact garbage collection for a // G1CollectedHeap using a four-phase pointer forwarding algorithm. All // generations are assumed to support marking; those that can also support // compaction. // // Class unloading will only occur when a full gc is invoked. class G1PrepareCompactClosure; class G1MarkSweep : AllStatic { friend class VM_G1MarkSweep; friend class Scavenge; public: static void invoke_at_safepoint(ReferenceProcessor* rp, bool clear_all_softrefs); static STWGCTimer* gc_timer() { return GenMarkSweep::_gc_timer; } static SerialOldTracer* gc_tracer() { return GenMarkSweep::_gc_tracer; } private: // Mark live objects static void mark_sweep_phase1(bool& marked_for_deopt, bool clear_all_softrefs); // Calculate new addresses static void mark_sweep_phase2(); // Update pointers static void mark_sweep_phase3(); // Move objects to new positions static void mark_sweep_phase4(); static void allocate_stacks(); static void prepare_compaction(); static void prepare_compaction_work(G1PrepareCompactClosure* blk); }; class G1PrepareCompactClosure : public HeapRegionClosure { protected: G1CollectedHeap* _g1h; ModRefBarrierSet* _mrbs; CompactPoint _cp; HeapRegionSetCount _humongous_regions_removed; virtual void prepare_for_compaction(HeapRegion* hr, HeapWord* end); void prepare_for_compaction_work(CompactPoint* cp, HeapRegion* hr, HeapWord* end); void free_humongous_region(HeapRegion* hr); bool is_cp_initialized() const { return _cp.space != NULL; } public: G1PrepareCompactClosure() : _g1h(G1CollectedHeap::heap()), _mrbs(_g1h->g1_barrier_set()), _humongous_regions_removed() { } void update_sets(); bool doHeapRegion(HeapRegion* hr); }; #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP