Mercurial > hg > graal-jvmci-8

annotate src/share/vm/gc_implementation/shared/markSweep.hpp @ 7448:b735136e0d82

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
8004132: SerialGC: ValidateMarkSweep broken when running GCOld Summary: Remove bit-rotten ValidateMarkSweep functionality and flag. Reviewed-by: johnc, jmasa Contributed-by: tamao <tao.mao@oracle.com>
author johnc
date Wed, 02 Jan 2013 11:32:41 -0800
parents da91efe96a93
children a08c80e9e1e5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1 /*
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load
duke
parents:
diff changeset
4 *
a61af66fc99e Initial load
duke
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load
duke
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load
duke
parents:
diff changeset
7 * published by the Free Software Foundation.
a61af66fc99e Initial load
duke
parents:
diff changeset
8 *
a61af66fc99e Initial load
duke
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load
duke
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load
duke
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load
duke
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load
duke
parents:
diff changeset
13 * accompanied this code).
a61af66fc99e Initial load
duke
parents:
diff changeset
14 *
a61af66fc99e Initial load
duke
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load
duke
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load
duke
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load
duke
parents:
diff changeset
18 *
1552
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1311
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1311
diff changeset
20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1311
diff changeset
21 * questions.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
22 *
a61af66fc99e Initial load
duke
parents:
diff changeset
23 */
a61af66fc99e Initial load
duke
parents:
diff changeset
24
1972
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_HPP
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_HPP
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
27
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
28 #include "gc_interface/collectedHeap.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
29 #include "memory/universe.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
30 #include "oops/markOop.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
31 #include "oops/oop.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
32 #include "runtime/timer.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
33 #include "utilities/growableArray.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
34 #include "utilities/stack.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
35 #include "utilities/taskqueue.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
36
0
a61af66fc99e Initial load
duke
parents:
diff changeset
37 class ReferenceProcessor;
941
8b46c4d82093 4957990: Perm heap bloat in JVM
ysr
parents: 196
diff changeset
38 class DataLayout;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
39
a61af66fc99e Initial load
duke
parents:
diff changeset
40 // MarkSweep takes care of global mark-compact garbage collection for a
a61af66fc99e Initial load
duke
parents:
diff changeset
41 // GenCollectedHeap using a four-phase pointer forwarding algorithm. All
a61af66fc99e Initial load
duke
parents:
diff changeset
42 // generations are assumed to support marking; those that can also support
a61af66fc99e Initial load
duke
parents:
diff changeset
43 // compaction.
a61af66fc99e Initial load
duke
parents:
diff changeset
44 //
a61af66fc99e Initial load
duke
parents:
diff changeset
45 // Class unloading will only occur when a full gc is invoked.
a61af66fc99e Initial load
duke
parents:
diff changeset
46
a61af66fc99e Initial load
duke
parents:
diff changeset
47 // declared at end
a61af66fc99e Initial load
duke
parents:
diff changeset
48 class PreservedMark;
a61af66fc99e Initial load
duke
parents:
diff changeset
49
a61af66fc99e Initial load
duke
parents:
diff changeset
50 class MarkSweep : AllStatic {
a61af66fc99e Initial load
duke
parents:
diff changeset
51 //
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
52 // Inline closure decls
0
a61af66fc99e Initial load
duke
parents:
diff changeset
53 //
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
54 class FollowRootClosure: public OopsInGenClosure {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
55 public:
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
56 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
57 virtual void do_oop(narrowOop* p);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
58 };
a61af66fc99e Initial load
duke
parents:
diff changeset
59
a61af66fc99e Initial load
duke
parents:
diff changeset
60 class MarkAndPushClosure: public OopClosure {
a61af66fc99e Initial load
duke
parents:
diff changeset
61 public:
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
62 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
63 virtual void do_oop(narrowOop* p);
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
64 };
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
65
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
66 // The one and only place to start following the classes.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
67 // Should only be applied to the ClassLoaderData klasses list.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
68 class FollowKlassClosure : public KlassClosure {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
69 public:
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
70 void do_klass(Klass* klass);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
71 };
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
72 class AdjustKlassClosure : public KlassClosure {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
73 public:
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
74 void do_klass(Klass* klass);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
75 };
a61af66fc99e Initial load
duke
parents:
diff changeset
76
a61af66fc99e Initial load
duke
parents:
diff changeset
77 class FollowStackClosure: public VoidClosure {
a61af66fc99e Initial load
duke
parents:
diff changeset
78 public:
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
79 virtual void do_void();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
80 };
a61af66fc99e Initial load
duke
parents:
diff changeset
81
a61af66fc99e Initial load
duke
parents:
diff changeset
82 class AdjustPointerClosure: public OopsInGenClosure {
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
83 private:
0
a61af66fc99e Initial load
duke
parents:
diff changeset
84 bool _is_root;
a61af66fc99e Initial load
duke
parents:
diff changeset
85 public:
a61af66fc99e Initial load
duke
parents:
diff changeset
86 AdjustPointerClosure(bool is_root) : _is_root(is_root) {}
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
87 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
88 virtual void do_oop(narrowOop* p);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
89 };
a61af66fc99e Initial load
duke
parents:
diff changeset
90
a61af66fc99e Initial load
duke
parents:
diff changeset
91 // Used for java/lang/ref handling
a61af66fc99e Initial load
duke
parents:
diff changeset
92 class IsAliveClosure: public BoolObjectClosure {
a61af66fc99e Initial load
duke
parents:
diff changeset
93 public:
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
94 virtual void do_object(oop p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
95 virtual bool do_object_b(oop p);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
96 };
a61af66fc99e Initial load
duke
parents:
diff changeset
97
a61af66fc99e Initial load
duke
parents:
diff changeset
98 class KeepAliveClosure: public OopClosure {
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
99 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
100 template <class T> void do_oop_work(T* p);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
101 public:
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
102 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
103 virtual void do_oop(narrowOop* p);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
104 };
a61af66fc99e Initial load
duke
parents:
diff changeset
105
a61af66fc99e Initial load
duke
parents:
diff changeset
106 //
a61af66fc99e Initial load
duke
parents:
diff changeset
107 // Friend decls
a61af66fc99e Initial load
duke
parents:
diff changeset
108 //
a61af66fc99e Initial load
duke
parents:
diff changeset
109 friend class AdjustPointerClosure;
a61af66fc99e Initial load
duke
parents:
diff changeset
110 friend class KeepAliveClosure;
a61af66fc99e Initial load
duke
parents:
diff changeset
111 friend class VM_MarkSweep;
a61af66fc99e Initial load
duke
parents:
diff changeset
112 friend void marksweep_init();
a61af66fc99e Initial load
duke
parents:
diff changeset
113
a61af66fc99e Initial load
duke
parents:
diff changeset
114 //
a61af66fc99e Initial load
duke
parents:
diff changeset
115 // Vars
a61af66fc99e Initial load
duke
parents:
diff changeset
116 //
a61af66fc99e Initial load
duke
parents:
diff changeset
117 protected:
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
118 // Total invocations of a MarkSweep collection
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
119 static unsigned int _total_invocations;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
120
1311
2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents: 1000
diff changeset
121 // Traversal stacks used during phase1
6197
d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 4099
diff changeset
122 static Stack<oop, mtGC> _marking_stack;
d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 4099
diff changeset
123 static Stack<ObjArrayTask, mtGC> _objarray_stack;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
124
a61af66fc99e Initial load
duke
parents:
diff changeset
125 // Space for storing/restoring mark word
6197
d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 4099
diff changeset
126 static Stack<markOop, mtGC> _preserved_mark_stack;
d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 4099
diff changeset
127 static Stack<oop, mtGC> _preserved_oop_stack;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
128 static size_t _preserved_count;
a61af66fc99e Initial load
duke
parents:
diff changeset
129 static size_t _preserved_count_max;
a61af66fc99e Initial load
duke
parents:
diff changeset
130 static PreservedMark* _preserved_marks;
a61af66fc99e Initial load
duke
parents:
diff changeset
131
a61af66fc99e Initial load
duke
parents:
diff changeset
132 // Reference processing (used in ...follow_contents)
a61af66fc99e Initial load
duke
parents:
diff changeset
133 static ReferenceProcessor* _ref_processor;
a61af66fc99e Initial load
duke
parents:
diff changeset
134
a61af66fc99e Initial load
duke
parents:
diff changeset
135 // Non public closures
a61af66fc99e Initial load
duke
parents:
diff changeset
136 static KeepAliveClosure keep_alive;
a61af66fc99e Initial load
duke
parents:
diff changeset
137
a61af66fc99e Initial load
duke
parents:
diff changeset
138 // Debugging
a61af66fc99e Initial load
duke
parents:
diff changeset
139 static void trace(const char* msg) PRODUCT_RETURN;
a61af66fc99e Initial load
duke
parents:
diff changeset
140
a61af66fc99e Initial load
duke
parents:
diff changeset
141 public:
a61af66fc99e Initial load
duke
parents:
diff changeset
142 // Public closures
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
143 static IsAliveClosure is_alive;
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
144 static FollowRootClosure follow_root_closure;
989
148e5441d916 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 196
diff changeset
145 static CodeBlobToOopClosure follow_code_root_closure; // => follow_root_closure
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
146 static MarkAndPushClosure mark_and_push_closure;
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
147 static FollowKlassClosure follow_klass_closure;
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
148 static FollowStackClosure follow_stack_closure;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
149 static AdjustPointerClosure adjust_root_pointer_closure;
a61af66fc99e Initial load
duke
parents:
diff changeset
150 static AdjustPointerClosure adjust_pointer_closure;
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
151 static AdjustKlassClosure adjust_klass_closure;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
152
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
153 // Accessors
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
154 static unsigned int total_invocations() { return _total_invocations; }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
155
a61af66fc99e Initial load
duke
parents:
diff changeset
156 // Reference Processing
a61af66fc99e Initial load
duke
parents:
diff changeset
157 static ReferenceProcessor* const ref_processor() { return _ref_processor; }
a61af66fc99e Initial load
duke
parents:
diff changeset
158
a61af66fc99e Initial load
duke
parents:
diff changeset
159 // Call backs for marking
a61af66fc99e Initial load
duke
parents:
diff changeset
160 static void mark_object(oop obj);
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
161 // Mark pointer and follow contents. Empty marking stack afterwards.
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
162 template <class T> static inline void follow_root(T* p);
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
163
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
164 // Check mark and maybe push on marking stack
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
165 template <class T> static void mark_and_push(T* p);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
166
1311
2a1472c30599 4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents: 1000
diff changeset
167 static inline void push_objarray(oop obj, size_t index);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
168
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
169 static void follow_stack(); // Empty marking stack.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
170
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
171 static void follow_klass(Klass* klass);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
172 static void adjust_klass(Klass* klass);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
173
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
174 static void follow_class_loader(ClassLoaderData* cld);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
175 static void adjust_class_loader(ClassLoaderData* cld);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6197
diff changeset
176
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
177 static void preserve_mark(oop p, markOop mark);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
178 // Save the mark word so it can be restored later
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
179 static void adjust_marks(); // Adjust the pointers in the preserved marks table
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
180 static void restore_marks(); // Restore the marks that we saved in preserve_mark
0
a61af66fc99e Initial load
duke
parents:
diff changeset
181
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
182 template <class T> static inline void adjust_pointer(T* p, bool isroot);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
183
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
184 static void adjust_root_pointer(oop* p) { adjust_pointer(p, true); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
185 static void adjust_pointer(oop* p) { adjust_pointer(p, false); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 0
diff changeset
186 static void adjust_pointer(narrowOop* p) { adjust_pointer(p, false); }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
187
a61af66fc99e Initial load
duke
parents:
diff changeset
188 };
a61af66fc99e Initial load
duke
parents:
diff changeset
189
a61af66fc99e Initial load
duke
parents:
diff changeset
190 class PreservedMark VALUE_OBJ_CLASS_SPEC {
a61af66fc99e Initial load
duke
parents:
diff changeset
191 private:
a61af66fc99e Initial load
duke
parents:
diff changeset
192 oop _obj;
a61af66fc99e Initial load
duke
parents:
diff changeset
193 markOop _mark;
a61af66fc99e Initial load
duke
parents:
diff changeset
194
a61af66fc99e Initial load
duke
parents:
diff changeset
195 public:
a61af66fc99e Initial load
duke
parents:
diff changeset
196 void init(oop obj, markOop mark) {
a61af66fc99e Initial load
duke
parents:
diff changeset
197 _obj = obj;
a61af66fc99e Initial load
duke
parents:
diff changeset
198 _mark = mark;
a61af66fc99e Initial load
duke
parents:
diff changeset
199 }
a61af66fc99e Initial load
duke
parents:
diff changeset
200
a61af66fc99e Initial load
duke
parents:
diff changeset
201 void adjust_pointer() {
a61af66fc99e Initial load
duke
parents:
diff changeset
202 MarkSweep::adjust_pointer(&_obj);
a61af66fc99e Initial load
duke
parents:
diff changeset
203 }
a61af66fc99e Initial load
duke
parents:
diff changeset
204
a61af66fc99e Initial load
duke
parents:
diff changeset
205 void restore() {
a61af66fc99e Initial load
duke
parents:
diff changeset
206 _obj->set_mark(_mark);
a61af66fc99e Initial load
duke
parents:
diff changeset
207 }
a61af66fc99e Initial load
duke
parents:
diff changeset
208 };
1972
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
209
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1836
diff changeset
210 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_HPP