18f3386a98
First mercurial integration of the code for the Garbage-First garbage collector. Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
/*
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* Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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class ReferenceProcessor;
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// G1MarkSweep takes care of global mark-compact garbage collection for a
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// G1CollectedHeap using a four-phase pointer forwarding algorithm. All
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// generations are assumed to support marking; those that can also support
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// compaction.
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//
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// Class unloading will only occur when a full gc is invoked.
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class G1MarkSweep : AllStatic {
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friend class VM_G1MarkSweep;
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friend class Scavenge;
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public:
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static void invoke_at_safepoint(ReferenceProcessor* rp,
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bool clear_all_softrefs);
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private:
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// Mark live objects
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static void mark_sweep_phase1(bool& marked_for_deopt,
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bool clear_all_softrefs);
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// Calculate new addresses
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static void mark_sweep_phase2();
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// Update pointers
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static void mark_sweep_phase3();
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// Move objects to new positions
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static void mark_sweep_phase4();
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static void allocate_stacks();
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};
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