Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/instanceRefKlass.cpp @ 481:7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
Reviewed-by: apetrusenko, ysr
author | jcoomes |
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date | Thu, 11 Dec 2008 12:05:08 -0800 |
parents | 1ee8caae33af |
children | df6caf649ff7 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1997-2008 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 # include "incls/_precompiled.incl" | |
26 # include "incls/_instanceRefKlass.cpp.incl" | |
27 | |
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28 template <class T> |
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29 static void specialized_oop_follow_contents(instanceRefKlass* ref, oop obj) { |
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30 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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31 oop referent = oopDesc::load_decode_heap_oop(referent_addr); |
0 | 32 debug_only( |
33 if(TraceReferenceGC && PrintGCDetails) { | |
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34 gclog_or_tty->print_cr("instanceRefKlass::oop_follow_contents " INTPTR_FORMAT, obj); |
0 | 35 } |
36 ) | |
37 if (referent != NULL) { | |
38 if (!referent->is_gc_marked() && | |
39 MarkSweep::ref_processor()-> | |
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40 discover_reference(obj, ref->reference_type())) { |
0 | 41 // reference already enqueued, referent will be traversed later |
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42 ref->instanceKlass::oop_follow_contents(obj); |
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43 debug_only( |
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44 if(TraceReferenceGC && PrintGCDetails) { |
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45 gclog_or_tty->print_cr(" Non NULL enqueued " INTPTR_FORMAT, obj); |
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46 } |
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47 ) |
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48 return; |
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49 } else { |
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50 // treat referent as normal oop |
0 | 51 debug_only( |
52 if(TraceReferenceGC && PrintGCDetails) { | |
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53 gclog_or_tty->print_cr(" Non NULL normal " INTPTR_FORMAT, obj); |
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54 } |
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55 ) |
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56 MarkSweep::mark_and_push(referent_addr); |
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57 } |
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58 } |
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59 // treat next as normal oop. next is a link in the pending list. |
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60 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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61 debug_only( |
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62 if(TraceReferenceGC && PrintGCDetails) { |
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63 gclog_or_tty->print_cr(" Process next as normal " INTPTR_FORMAT, next_addr); |
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64 } |
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65 ) |
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66 MarkSweep::mark_and_push(next_addr); |
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67 ref->instanceKlass::oop_follow_contents(obj); |
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68 } |
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69 |
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70 void instanceRefKlass::oop_follow_contents(oop obj) { |
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71 if (UseCompressedOops) { |
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72 specialized_oop_follow_contents<narrowOop>(this, obj); |
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73 } else { |
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74 specialized_oop_follow_contents<oop>(this, obj); |
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75 } |
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76 } |
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77 |
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78 #ifndef SERIALGC |
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79 template <class T> |
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80 static void specialized_oop_follow_contents(instanceRefKlass* ref, |
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81 ParCompactionManager* cm, |
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82 oop obj) { |
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83 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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84 oop referent = oopDesc::load_decode_heap_oop(referent_addr); |
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85 debug_only( |
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86 if(TraceReferenceGC && PrintGCDetails) { |
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87 gclog_or_tty->print_cr("instanceRefKlass::oop_follow_contents " INTPTR_FORMAT, obj); |
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88 } |
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89 ) |
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90 if (referent != NULL) { |
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91 if (PSParallelCompact::mark_bitmap()->is_unmarked(referent) && |
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92 PSParallelCompact::ref_processor()-> |
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93 discover_reference(obj, ref->reference_type())) { |
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94 // reference already enqueued, referent will be traversed later |
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95 ref->instanceKlass::oop_follow_contents(cm, obj); |
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96 debug_only( |
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97 if(TraceReferenceGC && PrintGCDetails) { |
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98 gclog_or_tty->print_cr(" Non NULL enqueued " INTPTR_FORMAT, obj); |
0 | 99 } |
100 ) | |
101 return; | |
102 } else { | |
103 // treat referent as normal oop | |
104 debug_only( | |
105 if(TraceReferenceGC && PrintGCDetails) { | |
113
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106 gclog_or_tty->print_cr(" Non NULL normal " INTPTR_FORMAT, obj); |
0 | 107 } |
108 ) | |
109 PSParallelCompact::mark_and_push(cm, referent_addr); | |
110 } | |
111 } | |
112 // treat next as normal oop. next is a link in the pending list. | |
113
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113 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
0 | 114 debug_only( |
115 if(TraceReferenceGC && PrintGCDetails) { | |
116 gclog_or_tty->print_cr(" Process next as normal " INTPTR_FORMAT, next_addr); | |
117 } | |
118 ) | |
119 PSParallelCompact::mark_and_push(cm, next_addr); | |
113
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120 ref->instanceKlass::oop_follow_contents(cm, obj); |
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121 } |
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122 |
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123 void instanceRefKlass::oop_follow_contents(ParCompactionManager* cm, |
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124 oop obj) { |
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125 if (UseCompressedOops) { |
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126 specialized_oop_follow_contents<narrowOop>(this, cm, obj); |
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127 } else { |
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128 specialized_oop_follow_contents<oop>(this, cm, obj); |
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129 } |
0 | 130 } |
131 #endif // SERIALGC | |
132 | |
113
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133 #ifdef ASSERT |
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134 template <class T> void trace_reference_gc(const char *s, oop obj, |
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135 T* referent_addr, |
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136 T* next_addr, |
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137 T* discovered_addr) { |
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138 if(TraceReferenceGC && PrintGCDetails) { |
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139 gclog_or_tty->print_cr("%s obj " INTPTR_FORMAT, s, (address)obj); |
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140 gclog_or_tty->print_cr(" referent_addr/* " INTPTR_FORMAT " / " |
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141 INTPTR_FORMAT, referent_addr, |
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142 referent_addr ? |
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143 (address)oopDesc::load_decode_heap_oop(referent_addr) : NULL); |
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144 gclog_or_tty->print_cr(" next_addr/* " INTPTR_FORMAT " / " |
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145 INTPTR_FORMAT, next_addr, |
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146 next_addr ? (address)oopDesc::load_decode_heap_oop(next_addr) : NULL); |
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147 gclog_or_tty->print_cr(" discovered_addr/* " INTPTR_FORMAT " / " |
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148 INTPTR_FORMAT, discovered_addr, |
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149 discovered_addr ? |
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150 (address)oopDesc::load_decode_heap_oop(discovered_addr) : NULL); |
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151 } |
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152 } |
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153 #endif |
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154 |
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155 template <class T> void specialized_oop_adjust_pointers(instanceRefKlass *ref, oop obj) { |
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156 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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157 MarkSweep::adjust_pointer(referent_addr); |
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158 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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159 MarkSweep::adjust_pointer(next_addr); |
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160 T* discovered_addr = (T*)java_lang_ref_Reference::discovered_addr(obj); |
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161 MarkSweep::adjust_pointer(discovered_addr); |
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162 debug_only(trace_reference_gc("instanceRefKlass::oop_adjust_pointers", obj, |
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163 referent_addr, next_addr, discovered_addr);) |
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164 } |
0 | 165 |
166 int instanceRefKlass::oop_adjust_pointers(oop obj) { | |
167 int size = size_helper(); | |
168 instanceKlass::oop_adjust_pointers(obj); | |
169 | |
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170 if (UseCompressedOops) { |
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171 specialized_oop_adjust_pointers<narrowOop>(this, obj); |
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172 } else { |
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173 specialized_oop_adjust_pointers<oop>(this, obj); |
0 | 174 } |
175 return size; | |
176 } | |
177 | |
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178 #define InstanceRefKlass_SPECIALIZED_OOP_ITERATE(T, nv_suffix, contains) \ |
342
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179 if (closure->apply_to_weak_ref_discovered_field()) { \ |
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180 T* disc_addr = (T*)java_lang_ref_Reference::discovered_addr(obj); \ |
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181 closure->do_oop##nv_suffix(disc_addr); \ |
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182 } \ |
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183 \ |
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184 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); \ |
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185 oop referent = oopDesc::load_decode_heap_oop(referent_addr); \ |
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186 if (referent != NULL && contains(referent_addr)) { \ |
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187 ReferenceProcessor* rp = closure->_ref_processor; \ |
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188 if (!referent->is_gc_marked() && (rp != NULL) && \ |
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189 rp->discover_reference(obj, reference_type())) { \ |
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190 return size; \ |
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191 } else { \ |
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192 /* treat referent as normal oop */ \ |
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193 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::irk);\ |
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194 closure->do_oop##nv_suffix(referent_addr); \ |
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195 } \ |
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196 } \ |
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197 /* treat next as normal oop */ \ |
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198 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); \ |
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199 if (contains(next_addr)) { \ |
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200 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::irk); \ |
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201 closure->do_oop##nv_suffix(next_addr); \ |
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202 } \ |
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203 return size; \ |
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204 |
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205 |
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206 template <class T> bool contains(T *t) { return true; } |
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207 |
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208 // Macro to define instanceRefKlass::oop_oop_iterate for virtual/nonvirtual for |
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209 // all closures. Macros calling macros above for each oop size. |
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210 |
0 | 211 #define InstanceRefKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
212 \ | |
213 int instanceRefKlass:: \ | |
214 oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ | |
215 /* Get size before changing pointers */ \ | |
216 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ | |
217 \ | |
218 int size = instanceKlass::oop_oop_iterate##nv_suffix(obj, closure); \ | |
219 \ | |
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220 if (UseCompressedOops) { \ |
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221 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(narrowOop, nv_suffix, contains); \ |
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222 } else { \ |
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223 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(oop, nv_suffix, contains); \ |
0 | 224 } \ |
225 } | |
226 | |
342
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227 #ifndef SERIALGC |
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228 #define InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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229 \ |
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230 int instanceRefKlass:: \ |
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231 oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* closure) { \ |
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232 /* Get size before changing pointers */ \ |
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233 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ |
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234 \ |
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235 int size = instanceKlass::oop_oop_iterate_backwards##nv_suffix(obj, closure); \ |
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236 \ |
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237 if (UseCompressedOops) { \ |
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238 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(narrowOop, nv_suffix, contains); \ |
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239 } else { \ |
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240 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(oop, nv_suffix, contains); \ |
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241 } \ |
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242 } |
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243 #endif // !SERIALGC |
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244 |
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245 |
0 | 246 #define InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
247 \ | |
248 int instanceRefKlass:: \ | |
249 oop_oop_iterate##nv_suffix##_m(oop obj, \ | |
250 OopClosureType* closure, \ | |
251 MemRegion mr) { \ | |
252 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ | |
253 \ | |
254 int size = instanceKlass::oop_oop_iterate##nv_suffix##_m(obj, closure, mr); \ | |
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255 if (UseCompressedOops) { \ |
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256 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(narrowOop, nv_suffix, mr.contains); \ |
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257 } else { \ |
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258 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(oop, nv_suffix, mr.contains); \ |
0 | 259 } \ |
260 } | |
261 | |
262 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DEFN) | |
342
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263 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DEFN) |
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264 #ifndef SERIALGC |
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265 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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266 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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267 #endif // SERIALGC |
0 | 268 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m) |
342
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269 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m) |
0 | 270 |
271 #ifndef SERIALGC | |
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272 template <class T> |
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273 void specialized_oop_copy_contents(instanceRefKlass *ref, |
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274 PSPromotionManager* pm, oop obj) { |
0 | 275 assert(!pm->depth_first(), "invariant"); |
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276 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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277 if (PSScavenge::should_scavenge(referent_addr)) { |
0 | 278 ReferenceProcessor* rp = PSScavenge::reference_processor(); |
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279 if (rp->discover_reference(obj, ref->reference_type())) { |
0 | 280 // reference already enqueued, referent and next will be traversed later |
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281 ref->instanceKlass::oop_copy_contents(pm, obj); |
0 | 282 return; |
283 } else { | |
284 // treat referent as normal oop | |
285 pm->claim_or_forward_breadth(referent_addr); | |
286 } | |
287 } | |
288 // treat next as normal oop | |
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289 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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290 if (PSScavenge::should_scavenge(next_addr)) { |
0 | 291 pm->claim_or_forward_breadth(next_addr); |
292 } | |
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293 ref->instanceKlass::oop_copy_contents(pm, obj); |
0 | 294 } |
295 | |
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296 void instanceRefKlass::oop_copy_contents(PSPromotionManager* pm, oop obj) { |
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297 if (UseCompressedOops) { |
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298 specialized_oop_copy_contents<narrowOop>(this, pm, obj); |
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299 } else { |
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300 specialized_oop_copy_contents<oop>(this, pm, obj); |
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301 } |
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302 } |
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303 |
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304 template <class T> |
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305 void specialized_oop_push_contents(instanceRefKlass *ref, |
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306 PSPromotionManager* pm, oop obj) { |
0 | 307 assert(pm->depth_first(), "invariant"); |
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308 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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309 if (PSScavenge::should_scavenge(referent_addr)) { |
0 | 310 ReferenceProcessor* rp = PSScavenge::reference_processor(); |
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311 if (rp->discover_reference(obj, ref->reference_type())) { |
0 | 312 // reference already enqueued, referent and next will be traversed later |
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313 ref->instanceKlass::oop_push_contents(pm, obj); |
0 | 314 return; |
315 } else { | |
316 // treat referent as normal oop | |
317 pm->claim_or_forward_depth(referent_addr); | |
318 } | |
319 } | |
320 // treat next as normal oop | |
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321 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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322 if (PSScavenge::should_scavenge(next_addr)) { |
0 | 323 pm->claim_or_forward_depth(next_addr); |
324 } | |
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325 ref->instanceKlass::oop_push_contents(pm, obj); |
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326 } |
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327 |
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328 void instanceRefKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
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329 if (UseCompressedOops) { |
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330 specialized_oop_push_contents<narrowOop>(this, pm, obj); |
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331 } else { |
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332 specialized_oop_push_contents<oop>(this, pm, obj); |
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333 } |
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334 } |
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335 |
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336 template <class T> |
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337 void specialized_oop_update_pointers(instanceRefKlass *ref, |
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338 ParCompactionManager* cm, oop obj) { |
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339 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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340 PSParallelCompact::adjust_pointer(referent_addr); |
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341 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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342 PSParallelCompact::adjust_pointer(next_addr); |
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343 T* discovered_addr = (T*)java_lang_ref_Reference::discovered_addr(obj); |
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344 PSParallelCompact::adjust_pointer(discovered_addr); |
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345 debug_only(trace_reference_gc("instanceRefKlass::oop_update_ptrs", obj, |
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346 referent_addr, next_addr, discovered_addr);) |
0 | 347 } |
348 | |
349 int instanceRefKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { | |
350 instanceKlass::oop_update_pointers(cm, obj); | |
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351 if (UseCompressedOops) { |
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352 specialized_oop_update_pointers<narrowOop>(this, cm, obj); |
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353 } else { |
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354 specialized_oop_update_pointers<oop>(this, cm, obj); |
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355 } |
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356 return size_helper(); |
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357 } |
0 | 358 |
359 | |
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360 template <class T> void |
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361 specialized_oop_update_pointers(ParCompactionManager* cm, oop obj, |
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362 HeapWord* beg_addr, HeapWord* end_addr) { |
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363 T* p; |
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364 T* referent_addr = p = (T*)java_lang_ref_Reference::referent_addr(obj); |
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365 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); |
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366 T* next_addr = p = (T*)java_lang_ref_Reference::next_addr(obj); |
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367 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); |
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368 T* discovered_addr = p = (T*)java_lang_ref_Reference::discovered_addr(obj); |
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369 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); |
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370 debug_only(trace_reference_gc("instanceRefKlass::oop_update_ptrs", obj, |
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371 referent_addr, next_addr, discovered_addr);) |
0 | 372 } |
373 | |
374 int | |
375 instanceRefKlass::oop_update_pointers(ParCompactionManager* cm, oop obj, | |
376 HeapWord* beg_addr, HeapWord* end_addr) { | |
377 instanceKlass::oop_update_pointers(cm, obj, beg_addr, end_addr); | |
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378 if (UseCompressedOops) { |
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379 specialized_oop_update_pointers<narrowOop>(cm, obj, beg_addr, end_addr); |
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380 } else { |
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381 specialized_oop_update_pointers<oop>(cm, obj, beg_addr, end_addr); |
0 | 382 } |
383 return size_helper(); | |
384 } | |
385 #endif // SERIALGC | |
386 | |
387 void instanceRefKlass::update_nonstatic_oop_maps(klassOop k) { | |
388 // Clear the nonstatic oop-map entries corresponding to referent | |
389 // and nextPending field. They are treated specially by the | |
390 // garbage collector. | |
391 // The discovered field is used only by the garbage collector | |
392 // and is also treated specially. | |
393 instanceKlass* ik = instanceKlass::cast(k); | |
394 | |
395 // Check that we have the right class | |
396 debug_only(static bool first_time = true); | |
397 assert(k == SystemDictionary::reference_klass() && first_time, | |
398 "Invalid update of maps"); | |
399 debug_only(first_time = false); | |
400 assert(ik->nonstatic_oop_map_size() == 1, "just checking"); | |
401 | |
402 OopMapBlock* map = ik->start_of_nonstatic_oop_maps(); | |
403 | |
404 // Check that the current map is (2,4) - currently points at field with | |
405 // offset 2 (words) and has 4 map entries. | |
406 debug_only(int offset = java_lang_ref_Reference::referent_offset); | |
407 debug_only(int length = ((java_lang_ref_Reference::discovered_offset - | |
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408 java_lang_ref_Reference::referent_offset)/heapOopSize) + 1); |
0 | 409 |
410 if (UseSharedSpaces) { | |
411 assert(map->offset() == java_lang_ref_Reference::queue_offset && | |
412 map->length() == 1, "just checking"); | |
413 } else { | |
414 assert(map->offset() == offset && map->length() == length, | |
415 "just checking"); | |
416 | |
417 // Update map to (3,1) - point to offset of 3 (words) with 1 map entry. | |
418 map->set_offset(java_lang_ref_Reference::queue_offset); | |
419 map->set_length(1); | |
420 } | |
421 } | |
422 | |
423 | |
424 // Verification | |
425 | |
426 void instanceRefKlass::oop_verify_on(oop obj, outputStream* st) { | |
427 instanceKlass::oop_verify_on(obj, st); | |
428 // Verify referent field | |
429 oop referent = java_lang_ref_Reference::referent(obj); | |
430 | |
431 // We should make this general to all heaps | |
432 GenCollectedHeap* gch = NULL; | |
433 if (Universe::heap()->kind() == CollectedHeap::GenCollectedHeap) | |
434 gch = GenCollectedHeap::heap(); | |
435 | |
436 if (referent != NULL) { | |
437 guarantee(referent->is_oop(), "referent field heap failed"); | |
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438 if (gch != NULL && !gch->is_in_youngest(obj)) { |
0 | 439 // We do a specific remembered set check here since the referent |
440 // field is not part of the oop mask and therefore skipped by the | |
441 // regular verify code. | |
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442 if (UseCompressedOops) { |
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443 narrowOop* referent_addr = (narrowOop*)java_lang_ref_Reference::referent_addr(obj); |
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444 obj->verify_old_oop(referent_addr, true); |
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445 } else { |
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446 oop* referent_addr = (oop*)java_lang_ref_Reference::referent_addr(obj); |
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447 obj->verify_old_oop(referent_addr, true); |
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448 } |
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449 } |
0 | 450 } |
451 // Verify next field | |
452 oop next = java_lang_ref_Reference::next(obj); | |
453 if (next != NULL) { | |
342
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454 guarantee(next->is_oop(), "next field verify failed"); |
0 | 455 guarantee(next->is_instanceRef(), "next field verify failed"); |
456 if (gch != NULL && !gch->is_in_youngest(obj)) { | |
457 // We do a specific remembered set check here since the next field is | |
458 // not part of the oop mask and therefore skipped by the regular | |
459 // verify code. | |
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460 if (UseCompressedOops) { |
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461 narrowOop* next_addr = (narrowOop*)java_lang_ref_Reference::next_addr(obj); |
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462 obj->verify_old_oop(next_addr, true); |
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463 } else { |
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464 oop* next_addr = (oop*)java_lang_ref_Reference::next_addr(obj); |
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465 obj->verify_old_oop(next_addr, true); |
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466 } |
0 | 467 } |
468 } | |
469 } | |
470 | |
471 void instanceRefKlass::acquire_pending_list_lock(BasicLock *pending_list_basic_lock) { | |
472 // we may enter this with pending exception set | |
473 PRESERVE_EXCEPTION_MARK; // exceptions are never thrown, needed for TRAPS argument | |
474 Handle h_lock(THREAD, java_lang_ref_Reference::pending_list_lock()); | |
475 ObjectSynchronizer::fast_enter(h_lock, pending_list_basic_lock, false, THREAD); | |
476 assert(ObjectSynchronizer::current_thread_holds_lock( | |
477 JavaThread::current(), h_lock), | |
478 "Locking should have succeeded"); | |
479 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; | |
480 } | |
481 | |
482 void instanceRefKlass::release_and_notify_pending_list_lock( | |
483 BasicLock *pending_list_basic_lock) { | |
484 // we may enter this with pending exception set | |
485 PRESERVE_EXCEPTION_MARK; // exceptions are never thrown, needed for TRAPS argument | |
486 // | |
487 Handle h_lock(THREAD, java_lang_ref_Reference::pending_list_lock()); | |
488 assert(ObjectSynchronizer::current_thread_holds_lock( | |
489 JavaThread::current(), h_lock), | |
490 "Lock should be held"); | |
491 // Notify waiters on pending lists lock if there is any reference. | |
492 if (java_lang_ref_Reference::pending_list() != NULL) { | |
493 ObjectSynchronizer::notifyall(h_lock, THREAD); | |
494 } | |
495 ObjectSynchronizer::fast_exit(h_lock(), pending_list_basic_lock, THREAD); | |
496 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; | |
497 } |