Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/g1MarkSweep.hpp @ 1842:6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
Summary: Under certain circumstances a safepoint could happen between a JavaThread object being created and that object being added to the Java threads list. This could cause the active field of that thread's SATB queue to get out-of-sync with respect to the other Java threads. The solution is to activate the SATB queue, when necessary, before adding the thread to the Java threads list, not when the JavaThread object is created. The changeset also includes a small fix to rename the surrogate locker thread from "Surrogate Locker Thread (CMS)" to "Surrogate Locker Thread (Concurrent GC)" since it's also used in G1.
Reviewed-by: iveresov, ysr, johnc, jcoomes
| author | tonyp |
|---|---|
| date | Fri, 01 Oct 2010 16:43:05 -0400 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2007, Oracle and/or its affiliates. All rights reserved. |
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| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
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| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 25 class ReferenceProcessor; | |
| 26 | |
| 27 // G1MarkSweep takes care of global mark-compact garbage collection for a | |
| 28 // G1CollectedHeap using a four-phase pointer forwarding algorithm. All | |
| 29 // generations are assumed to support marking; those that can also support | |
| 30 // compaction. | |
| 31 // | |
| 32 // Class unloading will only occur when a full gc is invoked. | |
| 33 | |
| 34 | |
| 35 class G1MarkSweep : AllStatic { | |
| 36 friend class VM_G1MarkSweep; | |
| 37 friend class Scavenge; | |
| 38 | |
| 39 public: | |
| 40 | |
| 41 static void invoke_at_safepoint(ReferenceProcessor* rp, | |
| 42 bool clear_all_softrefs); | |
| 43 | |
| 44 private: | |
| 45 | |
| 46 // Mark live objects | |
| 47 static void mark_sweep_phase1(bool& marked_for_deopt, | |
| 48 bool clear_all_softrefs); | |
| 49 // Calculate new addresses | |
| 50 static void mark_sweep_phase2(); | |
| 51 // Update pointers | |
| 52 static void mark_sweep_phase3(); | |
| 53 // Move objects to new positions | |
| 54 static void mark_sweep_phase4(); | |
| 55 | |
| 56 static void allocate_stacks(); | |
| 57 }; |