Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/concurrentG1RefineThread.hpp @ 1779:6eddcbe17c83
6981746: G1: SEGV with -XX:+TraceGen0Time
Summary: Pass correct value for length to NumberSeq constructor. Guard dereferences of "body_summary" pointer with a NULL check.
Reviewed-by: tonyp, ysr
author | johnc |
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date | Mon, 13 Sep 2010 10:00:24 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2009, Oracle and/or its affiliates. All rights reserved. |
342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
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 // Forward Decl. | |
26 class ConcurrentG1Refine; | |
27 | |
28 // The G1 Concurrent Refinement Thread (could be several in the future). | |
29 | |
30 class ConcurrentG1RefineThread: public ConcurrentGCThread { | |
31 friend class VMStructs; | |
32 friend class G1CollectedHeap; | |
33 | |
34 double _vtime_start; // Initial virtual time. | |
35 double _vtime_accum; // Initial virtual time. | |
794 | 36 int _worker_id; |
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37 int _worker_id_offset; |
342 | 38 |
794 | 39 // The refinement threads collection is linked list. A predecessor can activate a successor |
40 // when the number of the rset update buffer crosses a certain threshold. A successor | |
41 // would self-deactivate when the number of the buffers falls below the threshold. | |
42 bool _active; | |
1111 | 43 ConcurrentG1RefineThread* _next; |
44 Monitor* _monitor; | |
45 ConcurrentG1Refine* _cg1r; | |
342 | 46 |
1111 | 47 int _thread_threshold_step; |
48 // This thread activation threshold | |
49 int _threshold; | |
50 // This thread deactivation threshold | |
51 int _deactivation_threshold; | |
342 | 52 |
1111 | 53 void sample_young_list_rs_lengths(); |
54 void run_young_rs_sampling(); | |
55 void wait_for_completed_buffers(); | |
56 | |
57 void set_active(bool x) { _active = x; } | |
58 bool is_active(); | |
59 void activate(); | |
60 void deactivate(); | |
342 | 61 |
62 // For use by G1CollectedHeap, which is a friend. | |
63 static SuspendibleThreadSet* sts() { return &_sts; } | |
64 | |
1111 | 65 public: |
66 virtual void run(); | |
342 | 67 // Constructor |
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68 ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next, |
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69 int worker_id_offset, int worker_id); |
342 | 70 |
1111 | 71 void initialize(); |
72 | |
342 | 73 // Printing |
1019 | 74 void print() const; |
75 void print_on(outputStream* st) const; | |
342 | 76 |
77 // Total virtual time so far. | |
78 double vtime_accum() { return _vtime_accum; } | |
79 | |
1111 | 80 ConcurrentG1Refine* cg1r() { return _cg1r; } |
342 | 81 |
82 // Yield for GC | |
1111 | 83 void yield(); |
342 | 84 // shutdown |
794 | 85 void stop(); |
342 | 86 }; |