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6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") Summary: Make sure that two marking cycles do not overlap, i.e., a new one can only start after the concurrent marking thread finishes all its work. In the fix I piggy-back a couple of minor extra fixes: some general code reformatting for consistency (only around the code I modified), the removal of a field (G1CollectorPolicy::_should_initiate_conc_mark) which doesn't seem to be used at all (it's only set but never read), as well as moving the "is GC locker active" test earlier into the G1 pause / Full GC and using a more appropriate method for it. Reviewed-by: johnc, jmasa, jcoomes, ysr
author tonyp
date Tue, 06 Apr 2010 10:59:45 -0400
parents a61af66fc99e
children c18cbe5936b8
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1 Copyright %YEARS% Sun Microsystems, Inc. All Rights Reserved.
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2 DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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3
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4 This code is free software; you can redistribute it and/or modify it
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5 under the terms of the GNU General Public License version 2 only, as
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6 published by the Free Software Foundation. Sun designates this
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7 particular file as subject to the "Classpath" exception as provided
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8 by Sun in the LICENSE file that accompanied this code.
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9
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10 This code is distributed in the hope that it will be useful, but WITHOUT
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11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 version 2 for more details (a copy is included in the LICENSE file that
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14 accompanied this code).
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15
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16 You should have received a copy of the GNU General Public License version
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17 2 along with this work; if not, write to the Free Software Foundation,
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18 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19
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20 Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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21 CA 95054 USA or visit www.sun.com if you need additional information or
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22 have any questions.