Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/shared/markSweep.inline.hpp @ 356:1ee8caae33af
Merge
author | tonyp |
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date | Thu, 21 Aug 2008 23:36:31 -0400 |
parents | d1605aabd0a1 |
children | a4b729f5b611 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2000-2008 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 inline void MarkSweep::mark_object(oop obj) { | |
26 #ifndef SERIALGC | |
27 if (UseParallelOldGC && VerifyParallelOldWithMarkSweep) { | |
28 assert(PSParallelCompact::mark_bitmap()->is_marked(obj), | |
113
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29 "Should be marked in the marking bitmap"); |
0 | 30 } |
31 #endif // SERIALGC | |
32 | |
33 // some marks may contain information we need to preserve so we store them away | |
34 // and overwrite the mark. We'll restore it at the end of markSweep. | |
35 markOop mark = obj->mark(); | |
36 obj->set_mark(markOopDesc::prototype()->set_marked()); | |
37 | |
38 if (mark->must_be_preserved(obj)) { | |
39 preserve_mark(obj, mark); | |
40 } | |
41 } | |
113
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42 |
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43 template <class T> inline void MarkSweep::follow_root(T* p) { |
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44 assert(!Universe::heap()->is_in_reserved(p), |
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45 "roots shouldn't be things within the heap"); |
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46 #ifdef VALIDATE_MARK_SWEEP |
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47 if (ValidateMarkSweep) { |
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48 guarantee(!_root_refs_stack->contains(p), "should only be in here once"); |
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49 _root_refs_stack->push(p); |
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50 } |
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51 #endif |
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52 T heap_oop = oopDesc::load_heap_oop(p); |
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53 if (!oopDesc::is_null(heap_oop)) { |
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54 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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55 if (!obj->mark()->is_marked()) { |
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56 mark_object(obj); |
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57 obj->follow_contents(); |
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58 } |
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59 } |
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60 follow_stack(); |
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61 } |
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62 |
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63 template <class T> inline void MarkSweep::mark_and_follow(T* p) { |
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64 // assert(Universe::heap()->is_in_reserved(p), "should be in object space"); |
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65 T heap_oop = oopDesc::load_heap_oop(p); |
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66 if (!oopDesc::is_null(heap_oop)) { |
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67 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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68 if (!obj->mark()->is_marked()) { |
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69 mark_object(obj); |
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70 obj->follow_contents(); |
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71 } |
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72 } |
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73 } |
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74 |
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75 template <class T> inline void MarkSweep::mark_and_push(T* p) { |
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76 // assert(Universe::heap()->is_in_reserved(p), "should be in object space"); |
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77 T heap_oop = oopDesc::load_heap_oop(p); |
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78 if (!oopDesc::is_null(heap_oop)) { |
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79 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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80 if (!obj->mark()->is_marked()) { |
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81 mark_object(obj); |
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82 _marking_stack->push(obj); |
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83 } |
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84 } |
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85 } |
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86 |
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87 template <class T> inline void MarkSweep::adjust_pointer(T* p, bool isroot) { |
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88 T heap_oop = oopDesc::load_heap_oop(p); |
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89 if (!oopDesc::is_null(heap_oop)) { |
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90 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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91 oop new_obj = oop(obj->mark()->decode_pointer()); |
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92 assert(new_obj != NULL || // is forwarding ptr? |
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93 obj->mark() == markOopDesc::prototype() || // not gc marked? |
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94 (UseBiasedLocking && obj->mark()->has_bias_pattern()) || |
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95 // not gc marked? |
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96 obj->is_shared(), // never forwarded? |
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97 "should be forwarded"); |
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98 if (new_obj != NULL) { |
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99 assert(Universe::heap()->is_in_reserved(new_obj), |
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100 "should be in object space"); |
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101 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
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102 } |
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103 } |
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104 VALIDATE_MARK_SWEEP_ONLY(track_adjusted_pointer(p, isroot)); |
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105 } |
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106 |
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107 template <class T> inline void MarkSweep::KeepAliveClosure::do_oop_work(T* p) { |
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108 #ifdef VALIDATE_MARK_SWEEP |
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109 if (ValidateMarkSweep) { |
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110 if (!Universe::heap()->is_in_reserved(p)) { |
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111 _root_refs_stack->push(p); |
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112 } else { |
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113 _other_refs_stack->push(p); |
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114 } |
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115 } |
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116 #endif |
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117 mark_and_push(p); |
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118 } |