Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/vm_operations_g1.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 | 4e5661ba9d98 |
children | f95d63e2154a |
rev | line source |
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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 // VM_operations for the G1 collector. | |
26 // VM_GC_Operation: | |
27 // - VM_CGC_Operation | |
28 // - VM_G1CollectFull | |
29 // - VM_G1CollectForAllocation | |
30 // - VM_G1IncCollectionPause | |
31 // - VM_G1PopRegionCollectionPause | |
32 | |
33 class VM_G1CollectFull: public VM_GC_Operation { | |
34 public: | |
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35 VM_G1CollectFull(unsigned int gc_count_before, |
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36 unsigned int full_gc_count_before, |
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37 GCCause::Cause cause) |
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38 : VM_GC_Operation(gc_count_before, full_gc_count_before) { |
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39 _gc_cause = cause; |
342 | 40 } |
41 ~VM_G1CollectFull() {} | |
42 virtual VMOp_Type type() const { return VMOp_G1CollectFull; } | |
43 virtual void doit(); | |
44 virtual const char* name() const { | |
45 return "full garbage-first collection"; | |
46 } | |
47 }; | |
48 | |
49 class VM_G1CollectForAllocation: public VM_GC_Operation { | |
50 private: | |
51 HeapWord* _res; | |
52 size_t _size; // size of object to be allocated | |
53 public: | |
54 VM_G1CollectForAllocation(size_t size, int gc_count_before) | |
55 : VM_GC_Operation(gc_count_before) { | |
56 _size = size; | |
57 _res = NULL; | |
58 } | |
59 ~VM_G1CollectForAllocation() {} | |
60 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; } | |
61 virtual void doit(); | |
62 virtual const char* name() const { | |
63 return "garbage-first collection to satisfy allocation"; | |
64 } | |
65 HeapWord* result() { return _res; } | |
66 }; | |
67 | |
68 class VM_G1IncCollectionPause: public VM_GC_Operation { | |
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69 private: |
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70 bool _should_initiate_conc_mark; |
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71 double _target_pause_time_ms; |
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72 unsigned int _full_collections_completed_before; |
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73 public: |
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74 VM_G1IncCollectionPause(unsigned int gc_count_before, |
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75 bool should_initiate_conc_mark, |
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76 double target_pause_time_ms, |
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77 GCCause::Cause cause) |
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78 : VM_GC_Operation(gc_count_before), |
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79 _full_collections_completed_before(0), |
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80 _should_initiate_conc_mark(should_initiate_conc_mark), |
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81 _target_pause_time_ms(target_pause_time_ms) { |
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82 guarantee(target_pause_time_ms > 0.0, |
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83 err_msg("target_pause_time_ms = %1.6lf should be positive", |
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84 target_pause_time_ms)); |
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85 |
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86 _gc_cause = cause; |
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87 } |
342 | 88 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; } |
89 virtual void doit(); | |
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90 virtual void doit_epilogue(); |
342 | 91 virtual const char* name() const { |
92 return "garbage-first incremental collection pause"; | |
93 } | |
94 }; | |
95 | |
96 // Concurrent GC stop-the-world operations such as initial and final mark; | |
97 // consider sharing these with CMS's counterparts. | |
98 class VM_CGC_Operation: public VM_Operation { | |
99 VoidClosure* _cl; | |
100 const char* _printGCMessage; | |
101 public: | |
102 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg) : | |
103 _cl(cl), | |
104 _printGCMessage(printGCMsg) | |
105 {} | |
106 | |
107 ~VM_CGC_Operation() {} | |
108 | |
109 virtual VMOp_Type type() const { return VMOp_CGC_Operation; } | |
110 virtual void doit(); | |
111 virtual bool doit_prologue(); | |
112 virtual void doit_epilogue(); | |
113 virtual const char* name() const { | |
114 return "concurrent gc"; | |
115 } | |
116 }; |