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annotate src/share/vm/gc_implementation/shared/markSweep.inline.hpp @ 3710:4e037604f6ee
use alignment for constants specified in DataPatch.alignment
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Mon, 05 Dec 2011 18:15:25 -0800 |
parents | f95d63e2154a |
children | 7913e93dca52 |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
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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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP | |
27 | |
28 #include "gc_implementation/shared/markSweep.hpp" | |
29 #include "gc_interface/collectedHeap.hpp" | |
30 #include "utilities/stack.inline.hpp" | |
31 #ifndef SERIALGC | |
32 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" | |
33 #endif | |
34 | |
0 | 35 inline void MarkSweep::mark_object(oop obj) { |
36 // some marks may contain information we need to preserve so we store them away | |
37 // and overwrite the mark. We'll restore it at the end of markSweep. | |
38 markOop mark = obj->mark(); | |
39 obj->set_mark(markOopDesc::prototype()->set_marked()); | |
40 | |
41 if (mark->must_be_preserved(obj)) { | |
42 preserve_mark(obj, mark); | |
43 } | |
44 } | |
113
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45 |
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46 template <class T> inline void MarkSweep::follow_root(T* p) { |
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47 assert(!Universe::heap()->is_in_reserved(p), |
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48 "roots shouldn't be things within the heap"); |
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49 #ifdef VALIDATE_MARK_SWEEP |
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50 if (ValidateMarkSweep) { |
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51 guarantee(!_root_refs_stack->contains(p), "should only be in here once"); |
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52 _root_refs_stack->push(p); |
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53 } |
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54 #endif |
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55 T heap_oop = oopDesc::load_heap_oop(p); |
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56 if (!oopDesc::is_null(heap_oop)) { |
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57 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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58 if (!obj->mark()->is_marked()) { |
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59 mark_object(obj); |
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60 obj->follow_contents(); |
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61 } |
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62 } |
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63 follow_stack(); |
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64 } |
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65 |
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66 template <class T> inline void MarkSweep::mark_and_follow(T* p) { |
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67 // assert(Universe::heap()->is_in_reserved(p), "should be in object space"); |
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68 T heap_oop = oopDesc::load_heap_oop(p); |
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69 if (!oopDesc::is_null(heap_oop)) { |
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70 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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71 if (!obj->mark()->is_marked()) { |
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72 mark_object(obj); |
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73 obj->follow_contents(); |
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74 } |
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75 } |
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76 } |
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77 |
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78 template <class T> inline void MarkSweep::mark_and_push(T* p) { |
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79 // assert(Universe::heap()->is_in_reserved(p), "should be in object space"); |
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80 T heap_oop = oopDesc::load_heap_oop(p); |
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81 if (!oopDesc::is_null(heap_oop)) { |
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82 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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83 if (!obj->mark()->is_marked()) { |
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84 mark_object(obj); |
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85 _marking_stack.push(obj); |
113
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86 } |
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87 } |
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88 } |
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89 |
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90 void MarkSweep::push_objarray(oop obj, size_t index) { |
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91 ObjArrayTask task(obj, index); |
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92 assert(task.is_valid(), "bad ObjArrayTask"); |
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93 _objarray_stack.push(task); |
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94 } |
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95 |
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96 template <class T> inline void MarkSweep::adjust_pointer(T* p, bool isroot) { |
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97 T heap_oop = oopDesc::load_heap_oop(p); |
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98 if (!oopDesc::is_null(heap_oop)) { |
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99 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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100 oop new_obj = oop(obj->mark()->decode_pointer()); |
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101 assert(new_obj != NULL || // is forwarding ptr? |
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102 obj->mark() == markOopDesc::prototype() || // not gc marked? |
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103 (UseBiasedLocking && obj->mark()->has_bias_pattern()) || |
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104 // not gc marked? |
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105 obj->is_shared(), // never forwarded? |
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106 "should be forwarded"); |
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107 if (new_obj != NULL) { |
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108 assert(Universe::heap()->is_in_reserved(new_obj), |
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109 "should be in object space"); |
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110 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
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111 } |
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112 } |
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113 VALIDATE_MARK_SWEEP_ONLY(track_adjusted_pointer(p, isroot)); |
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114 } |
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115 |
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116 template <class T> inline void MarkSweep::KeepAliveClosure::do_oop_work(T* p) { |
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117 #ifdef VALIDATE_MARK_SWEEP |
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118 if (ValidateMarkSweep) { |
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119 if (!Universe::heap()->is_in_reserved(p)) { |
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120 _root_refs_stack->push(p); |
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121 } else { |
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122 _other_refs_stack->push(p); |
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123 } |
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124 } |
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125 #endif |
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126 mark_and_push(p); |
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127 } |
1972 | 128 |
129 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP |