Mercurial > hg > graal-compiler
annotate src/share/vm/oops/instanceRefKlass.cpp @ 2021:7cf1a74771e8
6988439: Parallel Class Loading test deadlock involving MethodData_lock and Pending List Lock
Summary: Don't acquire methodData_lock while holding pending list lock
Reviewed-by: kvn, never, ysr
author | coleenp |
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date | Fri, 10 Dec 2010 12:13:03 -0500 |
parents | f95d63e2154a |
children | b03e6b4c7c75 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1997, 2010, 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 * | |
1552
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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 "classfile/javaClasses.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "gc_implementation/shared/markSweep.inline.hpp" | |
29 #include "gc_interface/collectedHeap.hpp" | |
30 #include "gc_interface/collectedHeap.inline.hpp" | |
31 #include "memory/genCollectedHeap.hpp" | |
32 #include "memory/genOopClosures.inline.hpp" | |
33 #include "oops/instanceRefKlass.hpp" | |
34 #include "oops/oop.inline.hpp" | |
35 #include "utilities/preserveException.hpp" | |
36 #ifndef SERIALGC | |
37 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
38 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
39 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
40 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
41 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
42 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" | |
43 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
44 #include "oops/oop.pcgc.inline.hpp" | |
45 #endif | |
0 | 46 |
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47 template <class T> |
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48 static void specialized_oop_follow_contents(instanceRefKlass* ref, oop obj) { |
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49 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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50 T heap_oop = oopDesc::load_heap_oop(referent_addr); |
0 | 51 debug_only( |
52 if(TraceReferenceGC && PrintGCDetails) { | |
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53 gclog_or_tty->print_cr("instanceRefKlass::oop_follow_contents " INTPTR_FORMAT, obj); |
0 | 54 } |
55 ) | |
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56 if (!oopDesc::is_null(heap_oop)) { |
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57 oop referent = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 58 if (!referent->is_gc_marked() && |
59 MarkSweep::ref_processor()-> | |
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60 discover_reference(obj, ref->reference_type())) { |
0 | 61 // reference already enqueued, referent will be traversed later |
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62 ref->instanceKlass::oop_follow_contents(obj); |
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63 debug_only( |
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64 if(TraceReferenceGC && PrintGCDetails) { |
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65 gclog_or_tty->print_cr(" Non NULL enqueued " INTPTR_FORMAT, obj); |
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66 } |
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67 ) |
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68 return; |
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69 } else { |
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70 // treat referent as normal oop |
0 | 71 debug_only( |
72 if(TraceReferenceGC && PrintGCDetails) { | |
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73 gclog_or_tty->print_cr(" Non NULL normal " INTPTR_FORMAT, obj); |
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74 } |
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75 ) |
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76 MarkSweep::mark_and_push(referent_addr); |
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77 } |
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78 } |
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79 // treat next as normal oop. next is a link in the pending list. |
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80 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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81 debug_only( |
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82 if(TraceReferenceGC && PrintGCDetails) { |
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83 gclog_or_tty->print_cr(" Process next as normal " INTPTR_FORMAT, next_addr); |
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84 } |
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85 ) |
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86 MarkSweep::mark_and_push(next_addr); |
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87 ref->instanceKlass::oop_follow_contents(obj); |
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88 } |
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89 |
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90 void instanceRefKlass::oop_follow_contents(oop obj) { |
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91 if (UseCompressedOops) { |
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92 specialized_oop_follow_contents<narrowOop>(this, obj); |
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93 } else { |
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94 specialized_oop_follow_contents<oop>(this, obj); |
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95 } |
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96 } |
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97 |
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98 #ifndef SERIALGC |
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99 template <class T> |
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100 void specialized_oop_follow_contents(instanceRefKlass* ref, |
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101 ParCompactionManager* cm, |
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102 oop obj) { |
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103 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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104 T heap_oop = oopDesc::load_heap_oop(referent_addr); |
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105 debug_only( |
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106 if(TraceReferenceGC && PrintGCDetails) { |
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107 gclog_or_tty->print_cr("instanceRefKlass::oop_follow_contents " INTPTR_FORMAT, obj); |
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108 } |
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109 ) |
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110 if (!oopDesc::is_null(heap_oop)) { |
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111 oop referent = oopDesc::decode_heap_oop_not_null(heap_oop); |
113
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112 if (PSParallelCompact::mark_bitmap()->is_unmarked(referent) && |
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113 PSParallelCompact::ref_processor()-> |
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114 discover_reference(obj, ref->reference_type())) { |
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115 // reference already enqueued, referent will be traversed later |
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116 ref->instanceKlass::oop_follow_contents(cm, obj); |
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117 debug_only( |
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118 if(TraceReferenceGC && PrintGCDetails) { |
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119 gclog_or_tty->print_cr(" Non NULL enqueued " INTPTR_FORMAT, obj); |
0 | 120 } |
121 ) | |
122 return; | |
123 } else { | |
124 // treat referent as normal oop | |
125 debug_only( | |
126 if(TraceReferenceGC && PrintGCDetails) { | |
113
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127 gclog_or_tty->print_cr(" Non NULL normal " INTPTR_FORMAT, obj); |
0 | 128 } |
129 ) | |
130 PSParallelCompact::mark_and_push(cm, referent_addr); | |
131 } | |
132 } | |
133 // treat next as normal oop. next is a link in the pending list. | |
113
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134 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
0 | 135 debug_only( |
136 if(TraceReferenceGC && PrintGCDetails) { | |
137 gclog_or_tty->print_cr(" Process next as normal " INTPTR_FORMAT, next_addr); | |
138 } | |
139 ) | |
140 PSParallelCompact::mark_and_push(cm, next_addr); | |
113
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141 ref->instanceKlass::oop_follow_contents(cm, obj); |
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142 } |
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143 |
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144 void instanceRefKlass::oop_follow_contents(ParCompactionManager* cm, |
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145 oop obj) { |
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146 if (UseCompressedOops) { |
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147 specialized_oop_follow_contents<narrowOop>(this, cm, obj); |
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148 } else { |
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149 specialized_oop_follow_contents<oop>(this, cm, obj); |
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150 } |
0 | 151 } |
152 #endif // SERIALGC | |
153 | |
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154 #ifdef ASSERT |
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155 template <class T> void trace_reference_gc(const char *s, oop obj, |
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156 T* referent_addr, |
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157 T* next_addr, |
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158 T* discovered_addr) { |
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159 if(TraceReferenceGC && PrintGCDetails) { |
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160 gclog_or_tty->print_cr("%s obj " INTPTR_FORMAT, s, (address)obj); |
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161 gclog_or_tty->print_cr(" referent_addr/* " INTPTR_FORMAT " / " |
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162 INTPTR_FORMAT, referent_addr, |
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163 referent_addr ? |
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164 (address)oopDesc::load_decode_heap_oop(referent_addr) : NULL); |
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165 gclog_or_tty->print_cr(" next_addr/* " INTPTR_FORMAT " / " |
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166 INTPTR_FORMAT, next_addr, |
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167 next_addr ? (address)oopDesc::load_decode_heap_oop(next_addr) : NULL); |
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168 gclog_or_tty->print_cr(" discovered_addr/* " INTPTR_FORMAT " / " |
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169 INTPTR_FORMAT, discovered_addr, |
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170 discovered_addr ? |
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171 (address)oopDesc::load_decode_heap_oop(discovered_addr) : NULL); |
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172 } |
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173 } |
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174 #endif |
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175 |
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176 template <class T> void specialized_oop_adjust_pointers(instanceRefKlass *ref, oop obj) { |
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177 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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178 MarkSweep::adjust_pointer(referent_addr); |
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179 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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180 MarkSweep::adjust_pointer(next_addr); |
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181 T* discovered_addr = (T*)java_lang_ref_Reference::discovered_addr(obj); |
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182 MarkSweep::adjust_pointer(discovered_addr); |
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183 debug_only(trace_reference_gc("instanceRefKlass::oop_adjust_pointers", obj, |
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184 referent_addr, next_addr, discovered_addr);) |
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185 } |
0 | 186 |
187 int instanceRefKlass::oop_adjust_pointers(oop obj) { | |
188 int size = size_helper(); | |
189 instanceKlass::oop_adjust_pointers(obj); | |
190 | |
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191 if (UseCompressedOops) { |
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192 specialized_oop_adjust_pointers<narrowOop>(this, obj); |
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193 } else { |
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194 specialized_oop_adjust_pointers<oop>(this, obj); |
0 | 195 } |
196 return size; | |
197 } | |
198 | |
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199 #define InstanceRefKlass_SPECIALIZED_OOP_ITERATE(T, nv_suffix, contains) \ |
342
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200 if (closure->apply_to_weak_ref_discovered_field()) { \ |
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201 T* disc_addr = (T*)java_lang_ref_Reference::discovered_addr(obj); \ |
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202 closure->do_oop##nv_suffix(disc_addr); \ |
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203 } \ |
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204 \ |
113
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205 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); \ |
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206 T heap_oop = oopDesc::load_heap_oop(referent_addr); \ |
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207 if (!oopDesc::is_null(heap_oop) && contains(referent_addr)) { \ |
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208 ReferenceProcessor* rp = closure->_ref_processor; \ |
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209 oop referent = oopDesc::decode_heap_oop_not_null(heap_oop); \ |
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210 if (!referent->is_gc_marked() && (rp != NULL) && \ |
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211 rp->discover_reference(obj, reference_type())) { \ |
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212 return size; \ |
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213 } else { \ |
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214 /* treat referent as normal oop */ \ |
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215 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::irk);\ |
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216 closure->do_oop##nv_suffix(referent_addr); \ |
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217 } \ |
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218 } \ |
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219 /* treat next as normal oop */ \ |
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220 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); \ |
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221 if (contains(next_addr)) { \ |
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222 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::irk); \ |
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223 closure->do_oop##nv_suffix(next_addr); \ |
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224 } \ |
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225 return size; \ |
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226 |
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227 |
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228 template <class T> bool contains(T *t) { return true; } |
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229 |
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230 // Macro to define instanceRefKlass::oop_oop_iterate for virtual/nonvirtual for |
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231 // all closures. Macros calling macros above for each oop size. |
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232 |
0 | 233 #define InstanceRefKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
234 \ | |
235 int instanceRefKlass:: \ | |
236 oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ | |
237 /* Get size before changing pointers */ \ | |
238 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ | |
239 \ | |
240 int size = instanceKlass::oop_oop_iterate##nv_suffix(obj, closure); \ | |
241 \ | |
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242 if (UseCompressedOops) { \ |
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243 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(narrowOop, nv_suffix, contains); \ |
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244 } else { \ |
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245 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(oop, nv_suffix, contains); \ |
0 | 246 } \ |
247 } | |
248 | |
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249 #ifndef SERIALGC |
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250 #define InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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251 \ |
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252 int instanceRefKlass:: \ |
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253 oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* closure) { \ |
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254 /* Get size before changing pointers */ \ |
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255 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ |
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256 \ |
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257 int size = instanceKlass::oop_oop_iterate_backwards##nv_suffix(obj, closure); \ |
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258 \ |
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259 if (UseCompressedOops) { \ |
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260 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(narrowOop, nv_suffix, contains); \ |
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261 } else { \ |
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262 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(oop, nv_suffix, contains); \ |
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263 } \ |
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264 } |
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265 #endif // !SERIALGC |
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266 |
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267 |
0 | 268 #define InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
269 \ | |
270 int instanceRefKlass:: \ | |
271 oop_oop_iterate##nv_suffix##_m(oop obj, \ | |
272 OopClosureType* closure, \ | |
273 MemRegion mr) { \ | |
274 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk);\ | |
275 \ | |
276 int size = instanceKlass::oop_oop_iterate##nv_suffix##_m(obj, closure, mr); \ | |
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277 if (UseCompressedOops) { \ |
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278 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(narrowOop, nv_suffix, mr.contains); \ |
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279 } else { \ |
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280 InstanceRefKlass_SPECIALIZED_OOP_ITERATE(oop, nv_suffix, mr.contains); \ |
0 | 281 } \ |
282 } | |
283 | |
284 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DEFN) | |
342
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285 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DEFN) |
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286 #ifndef SERIALGC |
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287 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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288 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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289 #endif // SERIALGC |
0 | 290 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m) |
342
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291 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DEFN_m) |
0 | 292 |
293 #ifndef SERIALGC | |
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294 template <class T> |
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295 void specialized_oop_push_contents(instanceRefKlass *ref, |
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296 PSPromotionManager* pm, oop obj) { |
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297 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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298 if (PSScavenge::should_scavenge(referent_addr)) { |
0 | 299 ReferenceProcessor* rp = PSScavenge::reference_processor(); |
113
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300 if (rp->discover_reference(obj, ref->reference_type())) { |
0 | 301 // reference already enqueued, referent and next will be traversed later |
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302 ref->instanceKlass::oop_push_contents(pm, obj); |
0 | 303 return; |
304 } else { | |
305 // treat referent as normal oop | |
306 pm->claim_or_forward_depth(referent_addr); | |
307 } | |
308 } | |
309 // treat next as normal oop | |
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310 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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311 if (PSScavenge::should_scavenge(next_addr)) { |
0 | 312 pm->claim_or_forward_depth(next_addr); |
313 } | |
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314 ref->instanceKlass::oop_push_contents(pm, obj); |
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315 } |
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316 |
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317 void instanceRefKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
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318 if (UseCompressedOops) { |
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319 specialized_oop_push_contents<narrowOop>(this, pm, obj); |
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320 } else { |
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321 specialized_oop_push_contents<oop>(this, pm, obj); |
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322 } |
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323 } |
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324 |
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325 template <class T> |
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326 void specialized_oop_update_pointers(instanceRefKlass *ref, |
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327 ParCompactionManager* cm, oop obj) { |
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328 T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); |
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329 PSParallelCompact::adjust_pointer(referent_addr); |
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330 T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj); |
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331 PSParallelCompact::adjust_pointer(next_addr); |
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332 T* discovered_addr = (T*)java_lang_ref_Reference::discovered_addr(obj); |
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333 PSParallelCompact::adjust_pointer(discovered_addr); |
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334 debug_only(trace_reference_gc("instanceRefKlass::oop_update_ptrs", obj, |
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335 referent_addr, next_addr, discovered_addr);) |
0 | 336 } |
337 | |
338 int instanceRefKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { | |
339 instanceKlass::oop_update_pointers(cm, obj); | |
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340 if (UseCompressedOops) { |
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341 specialized_oop_update_pointers<narrowOop>(this, cm, obj); |
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342 } else { |
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343 specialized_oop_update_pointers<oop>(this, cm, obj); |
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344 } |
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345 return size_helper(); |
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346 } |
0 | 347 |
348 | |
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349 template <class T> void |
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350 specialized_oop_update_pointers(ParCompactionManager* cm, oop obj, |
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351 HeapWord* beg_addr, HeapWord* end_addr) { |
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352 T* p; |
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353 T* referent_addr = p = (T*)java_lang_ref_Reference::referent_addr(obj); |
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354 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); |
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355 T* next_addr = p = (T*)java_lang_ref_Reference::next_addr(obj); |
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356 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); |
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357 T* discovered_addr = p = (T*)java_lang_ref_Reference::discovered_addr(obj); |
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358 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); |
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359 debug_only(trace_reference_gc("instanceRefKlass::oop_update_ptrs", obj, |
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360 referent_addr, next_addr, discovered_addr);) |
0 | 361 } |
362 | |
363 int | |
364 instanceRefKlass::oop_update_pointers(ParCompactionManager* cm, oop obj, | |
365 HeapWord* beg_addr, HeapWord* end_addr) { | |
366 instanceKlass::oop_update_pointers(cm, obj, beg_addr, end_addr); | |
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367 if (UseCompressedOops) { |
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368 specialized_oop_update_pointers<narrowOop>(cm, obj, beg_addr, end_addr); |
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369 } else { |
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370 specialized_oop_update_pointers<oop>(cm, obj, beg_addr, end_addr); |
0 | 371 } |
372 return size_helper(); | |
373 } | |
374 #endif // SERIALGC | |
375 | |
376 void instanceRefKlass::update_nonstatic_oop_maps(klassOop k) { | |
377 // Clear the nonstatic oop-map entries corresponding to referent | |
378 // and nextPending field. They are treated specially by the | |
379 // garbage collector. | |
380 // The discovered field is used only by the garbage collector | |
381 // and is also treated specially. | |
382 instanceKlass* ik = instanceKlass::cast(k); | |
383 | |
384 // Check that we have the right class | |
385 debug_only(static bool first_time = true); | |
1142 | 386 assert(k == SystemDictionary::Reference_klass() && first_time, |
0 | 387 "Invalid update of maps"); |
388 debug_only(first_time = false); | |
938 | 389 assert(ik->nonstatic_oop_map_count() == 1, "just checking"); |
0 | 390 |
391 OopMapBlock* map = ik->start_of_nonstatic_oop_maps(); | |
392 | |
393 // Check that the current map is (2,4) - currently points at field with | |
394 // offset 2 (words) and has 4 map entries. | |
395 debug_only(int offset = java_lang_ref_Reference::referent_offset); | |
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396 debug_only(unsigned int count = ((java_lang_ref_Reference::discovered_offset - |
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397 java_lang_ref_Reference::referent_offset)/heapOopSize) + 1); |
0 | 398 |
399 if (UseSharedSpaces) { | |
400 assert(map->offset() == java_lang_ref_Reference::queue_offset && | |
938 | 401 map->count() == 1, "just checking"); |
0 | 402 } else { |
938 | 403 assert(map->offset() == offset && map->count() == count, |
0 | 404 "just checking"); |
405 | |
406 // Update map to (3,1) - point to offset of 3 (words) with 1 map entry. | |
407 map->set_offset(java_lang_ref_Reference::queue_offset); | |
938 | 408 map->set_count(1); |
0 | 409 } |
410 } | |
411 | |
412 | |
413 // Verification | |
414 | |
415 void instanceRefKlass::oop_verify_on(oop obj, outputStream* st) { | |
416 instanceKlass::oop_verify_on(obj, st); | |
417 // Verify referent field | |
418 oop referent = java_lang_ref_Reference::referent(obj); | |
419 | |
420 // We should make this general to all heaps | |
421 GenCollectedHeap* gch = NULL; | |
422 if (Universe::heap()->kind() == CollectedHeap::GenCollectedHeap) | |
423 gch = GenCollectedHeap::heap(); | |
424 | |
425 if (referent != NULL) { | |
426 guarantee(referent->is_oop(), "referent field heap failed"); | |
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427 if (gch != NULL && !gch->is_in_youngest(obj)) { |
0 | 428 // We do a specific remembered set check here since the referent |
429 // field is not part of the oop mask and therefore skipped by the | |
430 // regular verify code. | |
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431 if (UseCompressedOops) { |
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432 narrowOop* referent_addr = (narrowOop*)java_lang_ref_Reference::referent_addr(obj); |
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433 obj->verify_old_oop(referent_addr, true); |
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434 } else { |
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435 oop* referent_addr = (oop*)java_lang_ref_Reference::referent_addr(obj); |
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436 obj->verify_old_oop(referent_addr, true); |
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437 } |
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438 } |
0 | 439 } |
440 // Verify next field | |
441 oop next = java_lang_ref_Reference::next(obj); | |
442 if (next != NULL) { | |
342
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443 guarantee(next->is_oop(), "next field verify failed"); |
0 | 444 guarantee(next->is_instanceRef(), "next field verify failed"); |
445 if (gch != NULL && !gch->is_in_youngest(obj)) { | |
446 // We do a specific remembered set check here since the next field is | |
447 // not part of the oop mask and therefore skipped by the regular | |
448 // verify code. | |
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449 if (UseCompressedOops) { |
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450 narrowOop* next_addr = (narrowOop*)java_lang_ref_Reference::next_addr(obj); |
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451 obj->verify_old_oop(next_addr, true); |
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452 } else { |
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453 oop* next_addr = (oop*)java_lang_ref_Reference::next_addr(obj); |
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454 obj->verify_old_oop(next_addr, true); |
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455 } |
0 | 456 } |
457 } | |
458 } | |
459 | |
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460 bool instanceRefKlass::owns_pending_list_lock(JavaThread* thread) { |
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461 Handle h_lock(thread, java_lang_ref_Reference::pending_list_lock()); |
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462 return ObjectSynchronizer::current_thread_holds_lock(thread, h_lock); |
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463 } |
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464 |
0 | 465 void instanceRefKlass::acquire_pending_list_lock(BasicLock *pending_list_basic_lock) { |
466 // we may enter this with pending exception set | |
467 PRESERVE_EXCEPTION_MARK; // exceptions are never thrown, needed for TRAPS argument | |
468 Handle h_lock(THREAD, java_lang_ref_Reference::pending_list_lock()); | |
469 ObjectSynchronizer::fast_enter(h_lock, pending_list_basic_lock, false, THREAD); | |
470 assert(ObjectSynchronizer::current_thread_holds_lock( | |
471 JavaThread::current(), h_lock), | |
472 "Locking should have succeeded"); | |
473 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; | |
474 } | |
475 | |
476 void instanceRefKlass::release_and_notify_pending_list_lock( | |
477 BasicLock *pending_list_basic_lock) { | |
478 // we may enter this with pending exception set | |
479 PRESERVE_EXCEPTION_MARK; // exceptions are never thrown, needed for TRAPS argument | |
480 // | |
481 Handle h_lock(THREAD, java_lang_ref_Reference::pending_list_lock()); | |
482 assert(ObjectSynchronizer::current_thread_holds_lock( | |
483 JavaThread::current(), h_lock), | |
484 "Lock should be held"); | |
485 // Notify waiters on pending lists lock if there is any reference. | |
486 if (java_lang_ref_Reference::pending_list() != NULL) { | |
487 ObjectSynchronizer::notifyall(h_lock, THREAD); | |
488 } | |
489 ObjectSynchronizer::fast_exit(h_lock(), pending_list_basic_lock, THREAD); | |
490 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; | |
491 } |