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annotate src/share/vm/gc_implementation/shared/markSweep.cpp @ 13422:55dd6e77b399
8028624: [TESTBUG] compiler/intrinsics/mathexact/DecExactLTest executes DecExactITest
Reviewed-by: kvn, twisti
author | rbackman |
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date | Fri, 22 Nov 2013 15:26:37 +0100 |
parents | f2110083203d |
children | 55a0da3d420b |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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 * | |
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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 #include "precompiled.hpp" |
26 #include "compiler/compileBroker.hpp" | |
10405 | 27 #include "gc_implementation/shared/gcTimer.hpp" |
28 #include "gc_implementation/shared/gcTrace.hpp" | |
1972 | 29 #include "gc_implementation/shared/markSweep.inline.hpp" |
30 #include "gc_interface/collectedHeap.inline.hpp" | |
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31 #include "oops/methodData.hpp" |
1972 | 32 #include "oops/objArrayKlass.inline.hpp" |
33 #include "oops/oop.inline.hpp" | |
0 | 34 |
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35 uint MarkSweep::_total_invocations = 0; |
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36 |
6197 | 37 Stack<oop, mtGC> MarkSweep::_marking_stack; |
38 Stack<ObjArrayTask, mtGC> MarkSweep::_objarray_stack; | |
0 | 39 |
6197 | 40 Stack<oop, mtGC> MarkSweep::_preserved_oop_stack; |
41 Stack<markOop, mtGC> MarkSweep::_preserved_mark_stack; | |
0 | 42 size_t MarkSweep::_preserved_count = 0; |
43 size_t MarkSweep::_preserved_count_max = 0; | |
44 PreservedMark* MarkSweep::_preserved_marks = NULL; | |
45 ReferenceProcessor* MarkSweep::_ref_processor = NULL; | |
10405 | 46 STWGCTimer* MarkSweep::_gc_timer = NULL; |
47 SerialOldTracer* MarkSweep::_gc_tracer = NULL; | |
0 | 48 |
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49 MarkSweep::FollowRootClosure MarkSweep::follow_root_closure; |
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50 CodeBlobToOopClosure MarkSweep::follow_code_root_closure(&MarkSweep::follow_root_closure, /*do_marking=*/ true); |
0 | 51 |
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52 void MarkSweep::FollowRootClosure::do_oop(oop* p) { follow_root(p); } |
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53 void MarkSweep::FollowRootClosure::do_oop(narrowOop* p) { follow_root(p); } |
0 | 54 |
55 MarkSweep::MarkAndPushClosure MarkSweep::mark_and_push_closure; | |
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56 MarkSweep::FollowKlassClosure MarkSweep::follow_klass_closure; |
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57 MarkSweep::AdjustKlassClosure MarkSweep::adjust_klass_closure; |
0 | 58 |
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59 void MarkSweep::MarkAndPushClosure::do_oop(oop* p) { mark_and_push(p); } |
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60 void MarkSweep::MarkAndPushClosure::do_oop(narrowOop* p) { mark_and_push(p); } |
0 | 61 |
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62 void MarkSweep::FollowKlassClosure::do_klass(Klass* klass) { |
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63 klass->oops_do(&MarkSweep::mark_and_push_closure); |
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64 } |
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65 void MarkSweep::AdjustKlassClosure::do_klass(Klass* klass) { |
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66 klass->oops_do(&MarkSweep::adjust_pointer_closure); |
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67 } |
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68 |
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69 void MarkSweep::follow_klass(Klass* klass) { |
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70 ClassLoaderData* cld = klass->class_loader_data(); |
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71 // The actual processing of the klass is done when we |
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72 // traverse the list of Klasses in the class loader data. |
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73 MarkSweep::follow_class_loader(cld); |
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74 } |
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75 |
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76 void MarkSweep::adjust_klass(Klass* klass) { |
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77 ClassLoaderData* cld = klass->class_loader_data(); |
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78 // The actual processing of the klass is done when we |
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79 // traverse the list of Klasses in the class loader data. |
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80 MarkSweep::adjust_class_loader(cld); |
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81 } |
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82 |
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83 void MarkSweep::follow_class_loader(ClassLoaderData* cld) { |
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84 cld->oops_do(&MarkSweep::mark_and_push_closure, &MarkSweep::follow_klass_closure, true); |
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85 } |
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86 |
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87 void MarkSweep::adjust_class_loader(ClassLoaderData* cld) { |
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88 cld->oops_do(&MarkSweep::adjust_pointer_closure, &MarkSweep::adjust_klass_closure, true); |
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89 } |
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90 |
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91 |
0 | 92 void MarkSweep::follow_stack() { |
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93 do { |
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94 while (!_marking_stack.is_empty()) { |
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95 oop obj = _marking_stack.pop(); |
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96 assert (obj->is_gc_marked(), "p must be marked"); |
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97 obj->follow_contents(); |
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98 } |
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99 // Process ObjArrays one at a time to avoid marking stack bloat. |
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100 if (!_objarray_stack.is_empty()) { |
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101 ObjArrayTask task = _objarray_stack.pop(); |
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102 ObjArrayKlass* k = (ObjArrayKlass*)task.obj()->klass(); |
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103 k->oop_follow_contents(task.obj(), task.index()); |
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104 } |
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105 } while (!_marking_stack.is_empty() || !_objarray_stack.is_empty()); |
0 | 106 } |
107 | |
108 MarkSweep::FollowStackClosure MarkSweep::follow_stack_closure; | |
109 | |
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110 void MarkSweep::FollowStackClosure::do_void() { follow_stack(); } |
0 | 111 |
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112 // We preserve the mark which should be replaced at the end and the location |
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113 // that it will go. Note that the object that this markOop belongs to isn't |
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114 // currently at that address but it will be after phase4 |
0 | 115 void MarkSweep::preserve_mark(oop obj, markOop mark) { |
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116 // We try to store preserved marks in the to space of the new generation since |
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117 // this is storage which should be available. Most of the time this should be |
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118 // sufficient space for the marks we need to preserve but if it isn't we fall |
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119 // back to using Stacks to keep track of the overflow. |
0 | 120 if (_preserved_count < _preserved_count_max) { |
121 _preserved_marks[_preserved_count++].init(obj, mark); | |
122 } else { | |
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123 _preserved_mark_stack.push(mark); |
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124 _preserved_oop_stack.push(obj); |
0 | 125 } |
126 } | |
127 | |
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128 MarkSweep::AdjustPointerClosure MarkSweep::adjust_pointer_closure; |
0 | 129 |
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130 void MarkSweep::AdjustPointerClosure::do_oop(oop* p) { adjust_pointer(p); } |
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131 void MarkSweep::AdjustPointerClosure::do_oop(narrowOop* p) { adjust_pointer(p); } |
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132 |
0 | 133 void MarkSweep::adjust_marks() { |
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134 assert( _preserved_oop_stack.size() == _preserved_mark_stack.size(), |
0 | 135 "inconsistent preserved oop stacks"); |
136 | |
137 // adjust the oops we saved earlier | |
138 for (size_t i = 0; i < _preserved_count; i++) { | |
139 _preserved_marks[i].adjust_pointer(); | |
140 } | |
141 | |
142 // deal with the overflow stack | |
6197 | 143 StackIterator<oop, mtGC> iter(_preserved_oop_stack); |
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144 while (!iter.is_empty()) { |
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145 oop* p = iter.next_addr(); |
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146 adjust_pointer(p); |
0 | 147 } |
148 } | |
149 | |
150 void MarkSweep::restore_marks() { | |
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151 assert(_preserved_oop_stack.size() == _preserved_mark_stack.size(), |
0 | 152 "inconsistent preserved oop stacks"); |
153 if (PrintGC && Verbose) { | |
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154 gclog_or_tty->print_cr("Restoring %d marks", |
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155 _preserved_count + _preserved_oop_stack.size()); |
0 | 156 } |
157 | |
158 // restore the marks we saved earlier | |
159 for (size_t i = 0; i < _preserved_count; i++) { | |
160 _preserved_marks[i].restore(); | |
161 } | |
162 | |
163 // deal with the overflow | |
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164 while (!_preserved_oop_stack.is_empty()) { |
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165 oop obj = _preserved_oop_stack.pop(); |
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166 markOop mark = _preserved_mark_stack.pop(); |
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167 obj->set_mark(mark); |
0 | 168 } |
169 } | |
170 | |
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171 MarkSweep::IsAliveClosure MarkSweep::is_alive; |
0 | 172 |
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173 bool MarkSweep::IsAliveClosure::do_object_b(oop p) { return p->is_gc_marked(); } |
0 | 174 |
175 MarkSweep::KeepAliveClosure MarkSweep::keep_alive; | |
176 | |
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177 void MarkSweep::KeepAliveClosure::do_oop(oop* p) { MarkSweep::KeepAliveClosure::do_oop_work(p); } |
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178 void MarkSweep::KeepAliveClosure::do_oop(narrowOop* p) { MarkSweep::KeepAliveClosure::do_oop_work(p); } |
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179 |
10405 | 180 void marksweep_init() { |
181 MarkSweep::_gc_timer = new (ResourceObj::C_HEAP, mtGC) STWGCTimer(); | |
182 MarkSweep::_gc_tracer = new (ResourceObj::C_HEAP, mtGC) SerialOldTracer(); | |
183 } | |
0 | 184 |
185 #ifndef PRODUCT | |
186 | |
187 void MarkSweep::trace(const char* msg) { | |
188 if (TraceMarkSweep) | |
189 gclog_or_tty->print("%s", msg); | |
190 } | |
191 | |
192 #endif |