Mercurial > hg > truffle
annotate src/share/vm/oops/instanceRefKlass.cpp @ 938:b37c246bf7ce
6861660: OopMapBlock count/size confusion
Reviewed-by: tonyp, iveresov
author | jcoomes |
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date | Tue, 11 Aug 2009 15:37:23 -0700 |
parents | df6caf649ff7 |
children | 9eebd3ac74cf |
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 T heap_oop = oopDesc::load_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 ) | |
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37 if (!oopDesc::is_null(heap_oop)) { |
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38 oop referent = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 39 if (!referent->is_gc_marked() && |
40 MarkSweep::ref_processor()-> | |
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41 discover_reference(obj, ref->reference_type())) { |
0 | 42 // reference already enqueued, referent will be traversed later |
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43 ref->instanceKlass::oop_follow_contents(obj); |
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44 debug_only( |
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45 if(TraceReferenceGC && PrintGCDetails) { |
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46 gclog_or_tty->print_cr(" Non NULL enqueued " INTPTR_FORMAT, obj); |
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47 } |
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48 ) |
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49 return; |
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50 } else { |
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51 // treat referent as normal oop |
0 | 52 debug_only( |
53 if(TraceReferenceGC && PrintGCDetails) { | |
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54 gclog_or_tty->print_cr(" Non NULL normal " INTPTR_FORMAT, obj); |
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55 } |
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56 ) |
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57 MarkSweep::mark_and_push(referent_addr); |
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58 } |
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59 } |
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60 // treat next as normal oop. next is a link in the pending list. |
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61 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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62 debug_only( |
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63 if(TraceReferenceGC && PrintGCDetails) { |
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64 gclog_or_tty->print_cr(" Process next as normal " INTPTR_FORMAT, next_addr); |
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65 } |
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66 ) |
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67 MarkSweep::mark_and_push(next_addr); |
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68 ref->instanceKlass::oop_follow_contents(obj); |
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69 } |
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70 |
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71 void instanceRefKlass::oop_follow_contents(oop obj) { |
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72 if (UseCompressedOops) { |
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73 specialized_oop_follow_contents<narrowOop>(this, obj); |
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74 } else { |
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75 specialized_oop_follow_contents<oop>(this, obj); |
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76 } |
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77 } |
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78 |
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79 #ifndef SERIALGC |
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80 template <class T> |
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81 static void specialized_oop_follow_contents(instanceRefKlass* ref, |
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82 ParCompactionManager* cm, |
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83 oop obj) { |
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84 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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85 T heap_oop = oopDesc::load_heap_oop(referent_addr); |
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86 debug_only( |
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87 if(TraceReferenceGC && PrintGCDetails) { |
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88 gclog_or_tty->print_cr("instanceRefKlass::oop_follow_contents " INTPTR_FORMAT, obj); |
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89 } |
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90 ) |
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91 if (!oopDesc::is_null(heap_oop)) { |
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92 oop referent = oopDesc::decode_heap_oop_not_null(heap_oop); |
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93 if (PSParallelCompact::mark_bitmap()->is_unmarked(referent) && |
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94 PSParallelCompact::ref_processor()-> |
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95 discover_reference(obj, ref->reference_type())) { |
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96 // reference already enqueued, referent will be traversed later |
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97 ref->instanceKlass::oop_follow_contents(cm, obj); |
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98 debug_only( |
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99 if(TraceReferenceGC && PrintGCDetails) { |
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100 gclog_or_tty->print_cr(" Non NULL enqueued " INTPTR_FORMAT, obj); |
0 | 101 } |
102 ) | |
103 return; | |
104 } else { | |
105 // treat referent as normal oop | |
106 debug_only( | |
107 if(TraceReferenceGC && PrintGCDetails) { | |
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108 gclog_or_tty->print_cr(" Non NULL normal " INTPTR_FORMAT, obj); |
0 | 109 } |
110 ) | |
111 PSParallelCompact::mark_and_push(cm, referent_addr); | |
112 } | |
113 } | |
114 // treat next as normal oop. next is a link in the pending list. | |
113
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115 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
0 | 116 debug_only( |
117 if(TraceReferenceGC && PrintGCDetails) { | |
118 gclog_or_tty->print_cr(" Process next as normal " INTPTR_FORMAT, next_addr); | |
119 } | |
120 ) | |
121 PSParallelCompact::mark_and_push(cm, next_addr); | |
113
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122 ref->instanceKlass::oop_follow_contents(cm, obj); |
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123 } |
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124 |
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125 void instanceRefKlass::oop_follow_contents(ParCompactionManager* cm, |
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126 oop obj) { |
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127 if (UseCompressedOops) { |
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128 specialized_oop_follow_contents<narrowOop>(this, cm, obj); |
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129 } else { |
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130 specialized_oop_follow_contents<oop>(this, cm, obj); |
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131 } |
0 | 132 } |
133 #endif // SERIALGC | |
134 | |
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135 #ifdef ASSERT |
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136 template <class T> void trace_reference_gc(const char *s, oop obj, |
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137 T* referent_addr, |
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138 T* next_addr, |
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139 T* discovered_addr) { |
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140 if(TraceReferenceGC && PrintGCDetails) { |
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141 gclog_or_tty->print_cr("%s obj " INTPTR_FORMAT, s, (address)obj); |
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142 gclog_or_tty->print_cr(" referent_addr/* " INTPTR_FORMAT " / " |
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143 INTPTR_FORMAT, referent_addr, |
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144 referent_addr ? |
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145 (address)oopDesc::load_decode_heap_oop(referent_addr) : NULL); |
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146 gclog_or_tty->print_cr(" next_addr/* " INTPTR_FORMAT " / " |
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147 INTPTR_FORMAT, next_addr, |
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148 next_addr ? (address)oopDesc::load_decode_heap_oop(next_addr) : NULL); |
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149 gclog_or_tty->print_cr(" discovered_addr/* " INTPTR_FORMAT " / " |
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150 INTPTR_FORMAT, discovered_addr, |
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151 discovered_addr ? |
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152 (address)oopDesc::load_decode_heap_oop(discovered_addr) : NULL); |
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153 } |
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154 } |
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155 #endif |
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156 |
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157 template <class T> void specialized_oop_adjust_pointers(instanceRefKlass *ref, oop obj) { |
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158 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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159 MarkSweep::adjust_pointer(referent_addr); |
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160 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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161 MarkSweep::adjust_pointer(next_addr); |
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162 T* discovered_addr = (T*)java_lang_ref_Reference::discovered_addr(obj); |
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163 MarkSweep::adjust_pointer(discovered_addr); |
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164 debug_only(trace_reference_gc("instanceRefKlass::oop_adjust_pointers", obj, |
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165 referent_addr, next_addr, discovered_addr);) |
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166 } |
0 | 167 |
168 int instanceRefKlass::oop_adjust_pointers(oop obj) { | |
169 int size = size_helper(); | |
170 instanceKlass::oop_adjust_pointers(obj); | |
171 | |
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172 if (UseCompressedOops) { |
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173 specialized_oop_adjust_pointers<narrowOop>(this, obj); |
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174 } else { |
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175 specialized_oop_adjust_pointers<oop>(this, obj); |
0 | 176 } |
177 return size; | |
178 } | |
179 | |
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180 #define InstanceRefKlass_SPECIALIZED_OOP_ITERATE(T, nv_suffix, contains) \ |
342
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181 if (closure->apply_to_weak_ref_discovered_field()) { \ |
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182 T* disc_addr = (T*)java_lang_ref_Reference::discovered_addr(obj); \ |
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183 closure->do_oop##nv_suffix(disc_addr); \ |
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184 } \ |
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185 \ |
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186 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); \ |
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187 T heap_oop = oopDesc::load_heap_oop(referent_addr); \ |
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188 if (!oopDesc::is_null(heap_oop) && contains(referent_addr)) { \ |
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189 ReferenceProcessor* rp = closure->_ref_processor; \ |
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190 oop referent = oopDesc::decode_heap_oop_not_null(heap_oop); \ |
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191 if (!referent->is_gc_marked() && (rp != NULL) && \ |
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192 rp->discover_reference(obj, reference_type())) { \ |
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193 return size; \ |
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194 } else { \ |
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195 /* treat referent as normal oop */ \ |
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196 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::irk);\ |
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197 closure->do_oop##nv_suffix(referent_addr); \ |
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198 } \ |
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199 } \ |
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200 /* treat next as normal oop */ \ |
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201 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); \ |
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202 if (contains(next_addr)) { \ |
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203 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::irk); \ |
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204 closure->do_oop##nv_suffix(next_addr); \ |
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205 } \ |
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206 return size; \ |
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207 |
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208 |
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209 template <class T> bool contains(T *t) { return true; } |
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210 |
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211 // Macro to define instanceRefKlass::oop_oop_iterate for virtual/nonvirtual for |
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212 // all closures. Macros calling macros above for each oop size. |
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213 |
0 | 214 #define InstanceRefKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
215 \ | |
216 int instanceRefKlass:: \ | |
217 oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ | |
218 /* Get size before changing pointers */ \ | |
219 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ | |
220 \ | |
221 int size = instanceKlass::oop_oop_iterate##nv_suffix(obj, closure); \ | |
222 \ | |
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223 if (UseCompressedOops) { \ |
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224 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(narrowOop, nv_suffix, contains); \ |
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225 } else { \ |
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226 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(oop, nv_suffix, contains); \ |
0 | 227 } \ |
228 } | |
229 | |
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230 #ifndef SERIALGC |
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231 #define InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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232 \ |
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233 int instanceRefKlass:: \ |
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234 oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* closure) { \ |
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235 /* Get size before changing pointers */ \ |
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236 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ |
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237 \ |
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238 int size = instanceKlass::oop_oop_iterate_backwards##nv_suffix(obj, closure); \ |
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239 \ |
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240 if (UseCompressedOops) { \ |
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241 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(narrowOop, nv_suffix, contains); \ |
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242 } else { \ |
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243 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(oop, nv_suffix, contains); \ |
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244 } \ |
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245 } |
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246 #endif // !SERIALGC |
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247 |
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248 |
0 | 249 #define InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
250 \ | |
251 int instanceRefKlass:: \ | |
252 oop_oop_iterate##nv_suffix##_m(oop obj, \ | |
253 OopClosureType* closure, \ | |
254 MemRegion mr) { \ | |
255 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ | |
256 \ | |
257 int size = instanceKlass::oop_oop_iterate##nv_suffix##_m(obj, closure, mr); \ | |
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258 if (UseCompressedOops) { \ |
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259 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(narrowOop, nv_suffix, mr.contains); \ |
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260 } else { \ |
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261 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(oop, nv_suffix, mr.contains); \ |
0 | 262 } \ |
263 } | |
264 | |
265 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DEFN) | |
342
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266 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DEFN) |
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267 #ifndef SERIALGC |
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268 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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269 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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270 #endif // SERIALGC |
0 | 271 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m) |
342
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272 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m) |
0 | 273 |
274 #ifndef SERIALGC | |
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275 template <class T> |
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276 void specialized_oop_copy_contents(instanceRefKlass *ref, |
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277 PSPromotionManager* pm, oop obj) { |
0 | 278 assert(!pm->depth_first(), "invariant"); |
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279 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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280 if (PSScavenge::should_scavenge(referent_addr)) { |
0 | 281 ReferenceProcessor* rp = PSScavenge::reference_processor(); |
113
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282 if (rp->discover_reference(obj, ref->reference_type())) { |
0 | 283 // reference already enqueued, referent and next will be traversed later |
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284 ref->instanceKlass::oop_copy_contents(pm, obj); |
0 | 285 return; |
286 } else { | |
287 // treat referent as normal oop | |
288 pm->claim_or_forward_breadth(referent_addr); | |
289 } | |
290 } | |
291 // treat next as normal oop | |
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292 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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293 if (PSScavenge::should_scavenge(next_addr)) { |
0 | 294 pm->claim_or_forward_breadth(next_addr); |
295 } | |
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296 ref->instanceKlass::oop_copy_contents(pm, obj); |
0 | 297 } |
298 | |
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299 void instanceRefKlass::oop_copy_contents(PSPromotionManager* pm, oop obj) { |
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300 if (UseCompressedOops) { |
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301 specialized_oop_copy_contents<narrowOop>(this, pm, obj); |
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302 } else { |
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303 specialized_oop_copy_contents<oop>(this, pm, obj); |
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304 } |
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305 } |
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306 |
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307 template <class T> |
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308 void specialized_oop_push_contents(instanceRefKlass *ref, |
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309 PSPromotionManager* pm, oop obj) { |
0 | 310 assert(pm->depth_first(), "invariant"); |
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311 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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312 if (PSScavenge::should_scavenge(referent_addr)) { |
0 | 313 ReferenceProcessor* rp = PSScavenge::reference_processor(); |
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314 if (rp->discover_reference(obj, ref->reference_type())) { |
0 | 315 // reference already enqueued, referent and next will be traversed later |
113
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316 ref->instanceKlass::oop_push_contents(pm, obj); |
0 | 317 return; |
318 } else { | |
319 // treat referent as normal oop | |
320 pm->claim_or_forward_depth(referent_addr); | |
321 } | |
322 } | |
323 // treat next as normal oop | |
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324 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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325 if (PSScavenge::should_scavenge(next_addr)) { |
0 | 326 pm->claim_or_forward_depth(next_addr); |
327 } | |
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328 ref->instanceKlass::oop_push_contents(pm, obj); |
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329 } |
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330 |
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331 void instanceRefKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
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332 if (UseCompressedOops) { |
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333 specialized_oop_push_contents<narrowOop>(this, pm, obj); |
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334 } else { |
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335 specialized_oop_push_contents<oop>(this, pm, obj); |
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336 } |
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337 } |
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338 |
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339 template <class T> |
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340 void specialized_oop_update_pointers(instanceRefKlass *ref, |
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341 ParCompactionManager* cm, oop obj) { |
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342 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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343 PSParallelCompact::adjust_pointer(referent_addr); |
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344 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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345 PSParallelCompact::adjust_pointer(next_addr); |
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346 T* discovered_addr = (T*)java_lang_ref_Reference::discovered_addr(obj); |
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347 PSParallelCompact::adjust_pointer(discovered_addr); |
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348 debug_only(trace_reference_gc("instanceRefKlass::oop_update_ptrs", obj, |
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349 referent_addr, next_addr, discovered_addr);) |
0 | 350 } |
351 | |
352 int instanceRefKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { | |
353 instanceKlass::oop_update_pointers(cm, obj); | |
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354 if (UseCompressedOops) { |
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355 specialized_oop_update_pointers<narrowOop>(this, cm, obj); |
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356 } else { |
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357 specialized_oop_update_pointers<oop>(this, cm, obj); |
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358 } |
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359 return size_helper(); |
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360 } |
0 | 361 |
362 | |
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363 template <class T> void |
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364 specialized_oop_update_pointers(ParCompactionManager* cm, oop obj, |
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365 HeapWord* beg_addr, HeapWord* end_addr) { |
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366 T* p; |
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367 T* referent_addr = p = (T*)java_lang_ref_Reference::referent_addr(obj); |
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368 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); |
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369 T* next_addr = p = (T*)java_lang_ref_Reference::next_addr(obj); |
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370 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); |
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371 T* discovered_addr = p = (T*)java_lang_ref_Reference::discovered_addr(obj); |
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372 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); |
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373 debug_only(trace_reference_gc("instanceRefKlass::oop_update_ptrs", obj, |
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374 referent_addr, next_addr, discovered_addr);) |
0 | 375 } |
376 | |
377 int | |
378 instanceRefKlass::oop_update_pointers(ParCompactionManager* cm, oop obj, | |
379 HeapWord* beg_addr, HeapWord* end_addr) { | |
380 instanceKlass::oop_update_pointers(cm, obj, beg_addr, end_addr); | |
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381 if (UseCompressedOops) { |
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382 specialized_oop_update_pointers<narrowOop>(cm, obj, beg_addr, end_addr); |
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383 } else { |
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384 specialized_oop_update_pointers<oop>(cm, obj, beg_addr, end_addr); |
0 | 385 } |
386 return size_helper(); | |
387 } | |
388 #endif // SERIALGC | |
389 | |
390 void instanceRefKlass::update_nonstatic_oop_maps(klassOop k) { | |
391 // Clear the nonstatic oop-map entries corresponding to referent | |
392 // and nextPending field. They are treated specially by the | |
393 // garbage collector. | |
394 // The discovered field is used only by the garbage collector | |
395 // and is also treated specially. | |
396 instanceKlass* ik = instanceKlass::cast(k); | |
397 | |
398 // Check that we have the right class | |
399 debug_only(static bool first_time = true); | |
400 assert(k == SystemDictionary::reference_klass() && first_time, | |
401 "Invalid update of maps"); | |
402 debug_only(first_time = false); | |
938 | 403 assert(ik->nonstatic_oop_map_count() == 1, "just checking"); |
0 | 404 |
405 OopMapBlock* map = ik->start_of_nonstatic_oop_maps(); | |
406 | |
407 // Check that the current map is (2,4) - currently points at field with | |
408 // offset 2 (words) and has 4 map entries. | |
409 debug_only(int offset = java_lang_ref_Reference::referent_offset); | |
938 | 410 debug_only(int count = ((java_lang_ref_Reference::discovered_offset - |
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411 java_lang_ref_Reference::referent_offset)/heapOopSize) + 1); |
0 | 412 |
413 if (UseSharedSpaces) { | |
414 assert(map->offset() == java_lang_ref_Reference::queue_offset && | |
938 | 415 map->count() == 1, "just checking"); |
0 | 416 } else { |
938 | 417 assert(map->offset() == offset && map->count() == count, |
0 | 418 "just checking"); |
419 | |
420 // Update map to (3,1) - point to offset of 3 (words) with 1 map entry. | |
421 map->set_offset(java_lang_ref_Reference::queue_offset); | |
938 | 422 map->set_count(1); |
0 | 423 } |
424 } | |
425 | |
426 | |
427 // Verification | |
428 | |
429 void instanceRefKlass::oop_verify_on(oop obj, outputStream* st) { | |
430 instanceKlass::oop_verify_on(obj, st); | |
431 // Verify referent field | |
432 oop referent = java_lang_ref_Reference::referent(obj); | |
433 | |
434 // We should make this general to all heaps | |
435 GenCollectedHeap* gch = NULL; | |
436 if (Universe::heap()->kind() == CollectedHeap::GenCollectedHeap) | |
437 gch = GenCollectedHeap::heap(); | |
438 | |
439 if (referent != NULL) { | |
440 guarantee(referent->is_oop(), "referent field heap failed"); | |
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441 if (gch != NULL && !gch->is_in_youngest(obj)) { |
0 | 442 // We do a specific remembered set check here since the referent |
443 // field is not part of the oop mask and therefore skipped by the | |
444 // regular verify code. | |
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445 if (UseCompressedOops) { |
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446 narrowOop* referent_addr = (narrowOop*)java_lang_ref_Reference::referent_addr(obj); |
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447 obj->verify_old_oop(referent_addr, true); |
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448 } else { |
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449 oop* referent_addr = (oop*)java_lang_ref_Reference::referent_addr(obj); |
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450 obj->verify_old_oop(referent_addr, true); |
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451 } |
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452 } |
0 | 453 } |
454 // Verify next field | |
455 oop next = java_lang_ref_Reference::next(obj); | |
456 if (next != NULL) { | |
342
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457 guarantee(next->is_oop(), "next field verify failed"); |
0 | 458 guarantee(next->is_instanceRef(), "next field verify failed"); |
459 if (gch != NULL && !gch->is_in_youngest(obj)) { | |
460 // We do a specific remembered set check here since the next field is | |
461 // not part of the oop mask and therefore skipped by the regular | |
462 // verify code. | |
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463 if (UseCompressedOops) { |
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464 narrowOop* next_addr = (narrowOop*)java_lang_ref_Reference::next_addr(obj); |
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465 obj->verify_old_oop(next_addr, true); |
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466 } else { |
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467 oop* next_addr = (oop*)java_lang_ref_Reference::next_addr(obj); |
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468 obj->verify_old_oop(next_addr, true); |
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469 } |
0 | 470 } |
471 } | |
472 } | |
473 | |
474 void instanceRefKlass::acquire_pending_list_lock(BasicLock *pending_list_basic_lock) { | |
475 // we may enter this with pending exception set | |
476 PRESERVE_EXCEPTION_MARK; // exceptions are never thrown, needed for TRAPS argument | |
477 Handle h_lock(THREAD, java_lang_ref_Reference::pending_list_lock()); | |
478 ObjectSynchronizer::fast_enter(h_lock, pending_list_basic_lock, false, THREAD); | |
479 assert(ObjectSynchronizer::current_thread_holds_lock( | |
480 JavaThread::current(), h_lock), | |
481 "Locking should have succeeded"); | |
482 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; | |
483 } | |
484 | |
485 void instanceRefKlass::release_and_notify_pending_list_lock( | |
486 BasicLock *pending_list_basic_lock) { | |
487 // we may enter this with pending exception set | |
488 PRESERVE_EXCEPTION_MARK; // exceptions are never thrown, needed for TRAPS argument | |
489 // | |
490 Handle h_lock(THREAD, java_lang_ref_Reference::pending_list_lock()); | |
491 assert(ObjectSynchronizer::current_thread_holds_lock( | |
492 JavaThread::current(), h_lock), | |
493 "Lock should be held"); | |
494 // Notify waiters on pending lists lock if there is any reference. | |
495 if (java_lang_ref_Reference::pending_list() != NULL) { | |
496 ObjectSynchronizer::notifyall(h_lock, THREAD); | |
497 } | |
498 ObjectSynchronizer::fast_exit(h_lock(), pending_list_basic_lock, THREAD); | |
499 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; | |
500 } |