Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.cpp @ 11201:7fc3e1fb3965
Truffle-DSL: specialization group fixes.
author | Christian Humer <christian.humer@gmail.com> |
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date | Mon, 05 Aug 2013 19:50:34 +0200 |
parents | 6b0fd0964b87 |
children | cefad50507d8 |
rev | line source |
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0 | 1 /* |
7956 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/javaClasses.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "classfile/verifier.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
30 #include "compiler/compileBroker.hpp" | |
31 #include "gc_implementation/shared/markSweep.inline.hpp" | |
32 #include "gc_interface/collectedHeap.inline.hpp" | |
33 #include "interpreter/oopMapCache.hpp" | |
34 #include "interpreter/rewriter.hpp" | |
35 #include "jvmtifiles/jvmti.h" | |
36 #include "memory/genOopClosures.inline.hpp" | |
7956 | 37 #include "memory/heapInspection.hpp" |
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38 #include "memory/metadataFactory.hpp" |
1972 | 39 #include "memory/oopFactory.hpp" |
3938 | 40 #include "oops/fieldStreams.hpp" |
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41 #include "oops/instanceClassLoaderKlass.hpp" |
1972 | 42 #include "oops/instanceKlass.hpp" |
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43 #include "oops/instanceMirrorKlass.hpp" |
1972 | 44 #include "oops/instanceOop.hpp" |
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45 #include "oops/klass.inline.hpp" |
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46 #include "oops/method.hpp" |
1972 | 47 #include "oops/oop.inline.hpp" |
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48 #include "oops/symbol.hpp" |
1972 | 49 #include "prims/jvmtiExport.hpp" |
50 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
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51 #include "prims/jvmtiRedefineClasses.hpp" |
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52 #include "prims/methodComparator.hpp" |
1972 | 53 #include "runtime/fieldDescriptor.hpp" |
54 #include "runtime/handles.inline.hpp" | |
55 #include "runtime/javaCalls.hpp" | |
56 #include "runtime/mutexLocker.hpp" | |
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57 #include "runtime/thread.inline.hpp" |
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58 #include "services/classLoadingService.hpp" |
1972 | 59 #include "services/threadService.hpp" |
60 #include "utilities/dtrace.hpp" | |
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61 #include "utilities/macros.hpp" |
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62 #if INCLUDE_ALL_GCS |
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63 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
1972 | 64 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
65 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
66 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
67 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
68 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
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69 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
1972 | 70 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
71 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
72 #include "oops/oop.pcgc.inline.hpp" | |
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73 #endif // INCLUDE_ALL_GCS |
1972 | 74 #ifdef COMPILER1 |
75 #include "c1/c1_Compiler.hpp" | |
76 #endif | |
0 | 77 |
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78 #ifdef DTRACE_ENABLED |
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79 |
4006 | 80 #ifndef USDT2 |
81 | |
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82 HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required, |
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83 char*, intptr_t, oop, intptr_t); |
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84 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive, |
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85 char*, intptr_t, oop, intptr_t, int); |
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86 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent, |
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87 char*, intptr_t, oop, intptr_t, int); |
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88 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous, |
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89 char*, intptr_t, oop, intptr_t, int); |
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90 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed, |
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91 char*, intptr_t, oop, intptr_t, int); |
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92 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit, |
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93 char*, intptr_t, oop, intptr_t, int); |
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94 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error, |
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95 char*, intptr_t, oop, intptr_t, int); |
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96 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end, |
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97 char*, intptr_t, oop, intptr_t, int); |
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98 |
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99 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ |
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100 { \ |
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101 char* data = NULL; \ |
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102 int len = 0; \ |
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103 Symbol* name = (clss)->name(); \ |
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104 if (name != NULL) { \ |
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105 data = (char*)name->bytes(); \ |
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106 len = name->utf8_length(); \ |
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107 } \ |
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108 HS_DTRACE_PROBE4(hotspot, class__initialization__##type, \ |
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109 data, len, (clss)->class_loader(), thread_type); \ |
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110 } |
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111 |
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112 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ |
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113 { \ |
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114 char* data = NULL; \ |
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115 int len = 0; \ |
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116 Symbol* name = (clss)->name(); \ |
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117 if (name != NULL) { \ |
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118 data = (char*)name->bytes(); \ |
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119 len = name->utf8_length(); \ |
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120 } \ |
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121 HS_DTRACE_PROBE5(hotspot, class__initialization__##type, \ |
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122 data, len, (clss)->class_loader(), thread_type, wait); \ |
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123 } |
4006 | 124 #else /* USDT2 */ |
125 | |
126 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED | |
127 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE | |
128 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT | |
129 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS | |
130 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED | |
131 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT | |
132 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR | |
133 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END | |
134 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ | |
135 { \ | |
136 char* data = NULL; \ | |
137 int len = 0; \ | |
138 Symbol* name = (clss)->name(); \ | |
139 if (name != NULL) { \ | |
140 data = (char*)name->bytes(); \ | |
141 len = name->utf8_length(); \ | |
142 } \ | |
143 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
144 data, len, (clss)->class_loader(), thread_type); \ | |
145 } | |
146 | |
147 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ | |
148 { \ | |
149 char* data = NULL; \ | |
150 int len = 0; \ | |
151 Symbol* name = (clss)->name(); \ | |
152 if (name != NULL) { \ | |
153 data = (char*)name->bytes(); \ | |
154 len = name->utf8_length(); \ | |
155 } \ | |
156 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
157 data, len, (clss)->class_loader(), thread_type, wait); \ | |
158 } | |
159 #endif /* USDT2 */ | |
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160 |
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161 #else // ndef DTRACE_ENABLED |
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162 |
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163 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) |
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164 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) |
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165 |
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166 #endif // ndef DTRACE_ENABLED |
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167 |
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168 volatile int InstanceKlass::_total_instanceKlass_count = 0; |
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169 |
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170 InstanceKlass* InstanceKlass::allocate_instance_klass( |
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171 ClassLoaderData* loader_data, |
8031 | 172 int vtable_len, |
173 int itable_len, | |
174 int static_field_size, | |
175 int nonstatic_oop_map_size, | |
176 ReferenceType rt, | |
177 AccessFlags access_flags, | |
178 Symbol* name, | |
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179 Klass* super_klass, |
8031 | 180 bool is_anonymous, |
181 TRAPS) { | |
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182 |
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183 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
8031 | 184 access_flags.is_interface(), is_anonymous); |
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185 |
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186 // Allocation |
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187 InstanceKlass* ik; |
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188 if (rt == REF_NONE) { |
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189 if (name == vmSymbols::java_lang_Class()) { |
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190 ik = new (loader_data, size, THREAD) InstanceMirrorKlass( |
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191 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 192 access_flags, is_anonymous); |
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193 } else if (name == vmSymbols::java_lang_ClassLoader() || |
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194 (SystemDictionary::ClassLoader_klass_loaded() && |
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195 super_klass != NULL && |
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196 super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass()))) { |
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197 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass( |
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198 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 199 access_flags, is_anonymous); |
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200 } else { |
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201 // normal class |
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202 ik = new (loader_data, size, THREAD) InstanceKlass( |
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203 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 204 access_flags, is_anonymous); |
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205 } |
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206 } else { |
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207 // reference klass |
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208 ik = new (loader_data, size, THREAD) InstanceRefKlass( |
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209 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 210 access_flags, is_anonymous); |
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211 } |
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212 |
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213 // Check for pending exception before adding to the loader data and incrementing |
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214 // class count. Can get OOM here. |
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215 if (HAS_PENDING_EXCEPTION) { |
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216 return NULL; |
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217 } |
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218 |
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219 // Add all classes to our internal class loader list here, |
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220 // including classes in the bootstrap (NULL) class loader. |
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221 loader_data->add_class(ik); |
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222 |
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223 Atomic::inc(&_total_instanceKlass_count); |
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224 return ik; |
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225 } |
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226 |
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227 |
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228 // copy method ordering from resource area to Metaspace |
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229 void InstanceKlass::copy_method_ordering(intArray* m, TRAPS) { |
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230 if (m != NULL) { |
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231 // allocate a new array and copy contents (memcpy?) |
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232 _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK); |
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233 for (int i = 0; i < m->length(); i++) { |
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234 _method_ordering->at_put(i, m->at(i)); |
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235 } |
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236 } else { |
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237 _method_ordering = Universe::the_empty_int_array(); |
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238 } |
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239 } |
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240 |
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241 |
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242 InstanceKlass::InstanceKlass(int vtable_len, |
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243 int itable_len, |
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244 int static_field_size, |
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245 int nonstatic_oop_map_size, |
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246 ReferenceType rt, |
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247 AccessFlags access_flags, |
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248 bool is_anonymous) { |
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249 No_Safepoint_Verifier no_safepoint; // until k becomes parsable |
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250 |
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251 int iksize = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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252 access_flags.is_interface(), is_anonymous); |
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253 |
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254 set_vtable_length(vtable_len); |
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255 set_itable_length(itable_len); |
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256 set_static_field_size(static_field_size); |
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257 set_nonstatic_oop_map_size(nonstatic_oop_map_size); |
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258 set_access_flags(access_flags); |
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259 _misc_flags = 0; // initialize to zero |
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260 set_is_anonymous(is_anonymous); |
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261 assert(size() == iksize, "wrong size for object"); |
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262 |
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263 set_array_klasses(NULL); |
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264 set_methods(NULL); |
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265 set_method_ordering(NULL); |
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266 set_local_interfaces(NULL); |
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267 set_transitive_interfaces(NULL); |
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268 init_implementor(); |
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269 set_fields(NULL, 0); |
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270 set_constants(NULL); |
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271 set_class_loader_data(NULL); |
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272 set_source_file_name(NULL); |
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273 set_source_debug_extension(NULL, 0); |
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274 set_array_name(NULL); |
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275 set_inner_classes(NULL); |
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276 set_static_oop_field_count(0); |
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277 set_nonstatic_field_size(0); |
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278 set_is_marked_dependent(false); |
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279 set_init_state(InstanceKlass::allocated); |
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280 set_init_thread(NULL); |
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281 set_reference_type(rt); |
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282 set_oop_map_cache(NULL); |
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283 set_jni_ids(NULL); |
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284 set_osr_nmethods_head(NULL); |
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285 set_breakpoints(NULL); |
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286 init_previous_versions(); |
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287 set_generic_signature(NULL); |
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288 release_set_methods_jmethod_ids(NULL); |
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289 release_set_methods_cached_itable_indices(NULL); |
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290 set_annotations(NULL); |
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291 set_jvmti_cached_class_field_map(NULL); |
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292 set_initial_method_idnum(0); |
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293 _dependencies = NULL; |
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294 set_jvmti_cached_class_field_map(NULL); |
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295 set_cached_class_file(NULL); |
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296 set_initial_method_idnum(0); |
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297 set_minor_version(0); |
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298 set_major_version(0); |
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299 NOT_PRODUCT(_verify_count = 0;) |
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300 |
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301 // initialize the non-header words to zero |
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302 intptr_t* p = (intptr_t*)this; |
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303 for (int index = InstanceKlass::header_size(); index < iksize; index++) { |
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304 p[index] = NULL_WORD; |
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305 } |
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306 |
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307 // Set temporary value until parseClassFile updates it with the real instance |
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308 // size. |
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309 set_layout_helper(Klass::instance_layout_helper(0, true)); |
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310 } |
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311 |
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312 |
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313 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data, |
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314 Array<Method*>* methods) { |
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315 if (methods != NULL && methods != Universe::the_empty_method_array()) { |
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316 for (int i = 0; i < methods->length(); i++) { |
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317 Method* method = methods->at(i); |
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318 if (method == NULL) continue; // maybe null if error processing |
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319 // Only want to delete methods that are not executing for RedefineClasses. |
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320 // The previous version will point to them so they're not totally dangling |
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321 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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322 MetadataFactory::free_metadata(loader_data, method); |
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323 } |
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324 MetadataFactory::free_array<Method*>(loader_data, methods); |
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325 } |
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326 } |
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327 |
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328 void InstanceKlass::deallocate_interfaces(ClassLoaderData* loader_data, |
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329 Klass* super_klass, |
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330 Array<Klass*>* local_interfaces, |
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331 Array<Klass*>* transitive_interfaces) { |
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332 // Only deallocate transitive interfaces if not empty, same as super class |
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333 // or same as local interfaces. See code in parseClassFile. |
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334 Array<Klass*>* ti = transitive_interfaces; |
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335 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces) { |
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336 // check that the interfaces don't come from super class |
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337 Array<Klass*>* sti = (super_klass == NULL) ? NULL : |
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338 InstanceKlass::cast(super_klass)->transitive_interfaces(); |
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339 if (ti != sti) { |
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340 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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341 } |
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342 } |
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343 |
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344 // local interfaces can be empty |
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345 if (local_interfaces != Universe::the_empty_klass_array()) { |
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346 MetadataFactory::free_array<Klass*>(loader_data, local_interfaces); |
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347 } |
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348 } |
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349 |
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350 // This function deallocates the metadata and C heap pointers that the |
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351 // InstanceKlass points to. |
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352 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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353 |
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354 // Orphan the mirror first, CMS thinks it's still live. |
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355 if (java_mirror() != NULL) { |
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356 java_lang_Class::set_klass(java_mirror(), NULL); |
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357 } |
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358 |
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359 // Need to take this class off the class loader data list. |
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360 loader_data->remove_class(this); |
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361 |
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362 // The array_klass for this class is created later, after error handling. |
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363 // For class redefinition, we keep the original class so this scratch class |
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364 // doesn't have an array class. Either way, assert that there is nothing |
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365 // to deallocate. |
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366 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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367 |
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368 // Release C heap allocated data that this might point to, which includes |
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369 // reference counting symbol names. |
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370 release_C_heap_structures(); |
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371 |
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372 deallocate_methods(loader_data, methods()); |
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373 set_methods(NULL); |
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374 |
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375 if (method_ordering() != Universe::the_empty_int_array()) { |
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376 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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377 } |
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378 set_method_ordering(NULL); |
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379 |
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380 // This array is in Klass, but remove it with the InstanceKlass since |
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381 // this place would be the only caller and it can share memory with transitive |
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382 // interfaces. |
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383 if (secondary_supers() != Universe::the_empty_klass_array() && |
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384 secondary_supers() != transitive_interfaces()) { |
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385 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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386 } |
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387 set_secondary_supers(NULL); |
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388 |
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389 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces()); |
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390 set_transitive_interfaces(NULL); |
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391 set_local_interfaces(NULL); |
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392 |
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393 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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394 set_fields(NULL, 0); |
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395 |
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396 // If a method from a redefined class is using this constant pool, don't |
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397 // delete it, yet. The new class's previous version will point to this. |
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398 if (constants() != NULL) { |
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399 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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400 MetadataFactory::free_metadata(loader_data, constants()); |
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401 set_constants(NULL); |
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402 } |
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403 |
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404 if (inner_classes() != Universe::the_empty_short_array()) { |
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405 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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406 } |
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407 set_inner_classes(NULL); |
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408 |
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409 // We should deallocate the Annotations instance |
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410 MetadataFactory::free_metadata(loader_data, annotations()); |
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411 set_annotations(NULL); |
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412 } |
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413 |
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414 bool InstanceKlass::should_be_initialized() const { |
0 | 415 return !is_initialized(); |
416 } | |
417 | |
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418 klassVtable* InstanceKlass::vtable() const { |
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419 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
0 | 420 } |
421 | |
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422 klassItable* InstanceKlass::itable() const { |
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423 return new klassItable(instanceKlassHandle(this)); |
0 | 424 } |
425 | |
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426 void InstanceKlass::eager_initialize(Thread *thread) { |
0 | 427 if (!EagerInitialization) return; |
428 | |
429 if (this->is_not_initialized()) { | |
430 // abort if the the class has a class initializer | |
431 if (this->class_initializer() != NULL) return; | |
432 | |
433 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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434 Klass* super = this->super(); |
0 | 435 if (super == NULL) return; |
436 | |
437 // abort if the super class should be initialized | |
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438 if (!InstanceKlass::cast(super)->is_initialized()) return; |
0 | 439 |
440 // call body to expose the this pointer | |
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441 instanceKlassHandle this_oop(thread, this); |
0 | 442 eager_initialize_impl(this_oop); |
443 } | |
444 } | |
445 | |
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446 // JVMTI spec thinks there are signers and protection domain in the |
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447 // instanceKlass. These accessors pretend these fields are there. |
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448 // The hprof specification also thinks these fields are in InstanceKlass. |
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449 oop InstanceKlass::protection_domain() const { |
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450 // return the protection_domain from the mirror |
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451 return java_lang_Class::protection_domain(java_mirror()); |
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452 } |
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453 |
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454 // To remove these from requires an incompatible change and CCC request. |
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455 objArrayOop InstanceKlass::signers() const { |
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456 // return the signers from the mirror |
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457 return java_lang_Class::signers(java_mirror()); |
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458 } |
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459 |
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460 volatile oop InstanceKlass::init_lock() const { |
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461 // return the init lock from the mirror |
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462 return java_lang_Class::init_lock(java_mirror()); |
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463 } |
0 | 464 |
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465 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
0 | 466 EXCEPTION_MARK; |
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467 volatile oop init_lock = this_oop->init_lock(); |
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468 ObjectLocker ol(init_lock, THREAD); |
0 | 469 |
470 // abort if someone beat us to the initialization | |
471 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
472 | |
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473 ClassState old_state = this_oop->init_state(); |
0 | 474 link_class_impl(this_oop, true, THREAD); |
475 if (HAS_PENDING_EXCEPTION) { | |
476 CLEAR_PENDING_EXCEPTION; | |
477 // Abort if linking the class throws an exception. | |
478 | |
479 // Use a test to avoid redundantly resetting the state if there's | |
480 // no change. Set_init_state() asserts that state changes make | |
481 // progress, whereas here we might just be spinning in place. | |
482 if( old_state != this_oop->_init_state ) | |
483 this_oop->set_init_state (old_state); | |
484 } else { | |
485 // linking successfull, mark class as initialized | |
486 this_oop->set_init_state (fully_initialized); | |
487 // trace | |
488 if (TraceClassInitialization) { | |
489 ResourceMark rm(THREAD); | |
490 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
491 } | |
492 } | |
493 } | |
494 | |
495 | |
496 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
497 // process. The step comments refers to the procedure described in that section. | |
498 // Note: implementation moved to static method to expose the this pointer. | |
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499 void InstanceKlass::initialize(TRAPS) { |
0 | 500 if (this->should_be_initialized()) { |
501 HandleMark hm(THREAD); | |
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502 instanceKlassHandle this_oop(THREAD, this); |
0 | 503 initialize_impl(this_oop, CHECK); |
504 // Note: at this point the class may be initialized | |
505 // OR it may be in the state of being initialized | |
506 // in case of recursive initialization! | |
507 } else { | |
508 assert(is_initialized(), "sanity check"); | |
509 } | |
510 } | |
511 | |
512 | |
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513 bool InstanceKlass::verify_code( |
0 | 514 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
515 // 1) Verify the bytecodes | |
516 Verifier::Mode mode = | |
517 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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518 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
0 | 519 } |
520 | |
521 | |
522 // Used exclusively by the shared spaces dump mechanism to prevent | |
523 // classes mapped into the shared regions in new VMs from appearing linked. | |
524 | |
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525 void InstanceKlass::unlink_class() { |
0 | 526 assert(is_linked(), "must be linked"); |
527 _init_state = loaded; | |
528 } | |
529 | |
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530 void InstanceKlass::link_class(TRAPS) { |
0 | 531 assert(is_loaded(), "must be loaded"); |
532 if (!is_linked()) { | |
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533 HandleMark hm(THREAD); |
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534 instanceKlassHandle this_oop(THREAD, this); |
0 | 535 link_class_impl(this_oop, true, CHECK); |
536 } | |
537 } | |
538 | |
539 // Called to verify that a class can link during initialization, without | |
540 // throwing a VerifyError. | |
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541 bool InstanceKlass::link_class_or_fail(TRAPS) { |
0 | 542 assert(is_loaded(), "must be loaded"); |
543 if (!is_linked()) { | |
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544 HandleMark hm(THREAD); |
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545 instanceKlassHandle this_oop(THREAD, this); |
0 | 546 link_class_impl(this_oop, false, CHECK_false); |
547 } | |
548 return is_linked(); | |
549 } | |
550 | |
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551 bool InstanceKlass::link_class_impl( |
0 | 552 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
553 // check for error state | |
554 if (this_oop->is_in_error_state()) { | |
555 ResourceMark rm(THREAD); | |
556 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
557 this_oop->external_name(), false); | |
558 } | |
559 // return if already verified | |
560 if (this_oop->is_linked()) { | |
561 return true; | |
562 } | |
563 | |
564 // Timing | |
565 // timer handles recursion | |
566 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
567 JavaThread* jt = (JavaThread*)THREAD; | |
568 | |
569 // link super class before linking this class | |
570 instanceKlassHandle super(THREAD, this_oop->super()); | |
571 if (super.not_null()) { | |
572 if (super->is_interface()) { // check if super class is an interface | |
573 ResourceMark rm(THREAD); | |
574 Exceptions::fthrow( | |
575 THREAD_AND_LOCATION, | |
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576 vmSymbols::java_lang_IncompatibleClassChangeError(), |
0 | 577 "class %s has interface %s as super class", |
578 this_oop->external_name(), | |
579 super->external_name() | |
580 ); | |
581 return false; | |
582 } | |
583 | |
584 link_class_impl(super, throw_verifyerror, CHECK_false); | |
585 } | |
586 | |
587 // link all interfaces implemented by this class before linking this class | |
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588 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
0 | 589 int num_interfaces = interfaces->length(); |
590 for (int index = 0; index < num_interfaces; index++) { | |
591 HandleMark hm(THREAD); | |
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592 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
0 | 593 link_class_impl(ih, throw_verifyerror, CHECK_false); |
594 } | |
595 | |
596 // in case the class is linked in the process of linking its superclasses | |
597 if (this_oop->is_linked()) { | |
598 return true; | |
599 } | |
600 | |
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601 // trace only the link time for this klass that includes |
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602 // the verification time |
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603 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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604 ClassLoader::perf_class_link_selftime(), |
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605 ClassLoader::perf_classes_linked(), |
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606 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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607 jt->get_thread_stat()->perf_timers_addr(), |
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608 PerfClassTraceTime::CLASS_LINK); |
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609 |
0 | 610 // verification & rewriting |
611 { | |
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612 volatile oop init_lock = this_oop->init_lock(); |
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613 ObjectLocker ol(init_lock, THREAD); |
0 | 614 // rewritten will have been set if loader constraint error found |
615 // on an earlier link attempt | |
616 // don't verify or rewrite if already rewritten | |
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617 |
0 | 618 if (!this_oop->is_linked()) { |
619 if (!this_oop->is_rewritten()) { | |
620 { | |
621 // Timer includes any side effects of class verification (resolution, | |
622 // etc), but not recursive entry into verify_code(). | |
875
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623 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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624 ClassLoader::perf_class_verify_selftime(), |
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625 ClassLoader::perf_classes_verified(), |
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626 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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627 jt->get_thread_stat()->perf_timers_addr(), |
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628 PerfClassTraceTime::CLASS_VERIFY); |
0 | 629 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
630 if (!verify_ok) { | |
631 return false; | |
632 } | |
633 } | |
634 | |
635 // Just in case a side-effect of verify linked this class already | |
636 // (which can sometimes happen since the verifier loads classes | |
637 // using custom class loaders, which are free to initialize things) | |
638 if (this_oop->is_linked()) { | |
639 return true; | |
640 } | |
641 | |
642 // also sets rewritten | |
643 this_oop->rewrite_class(CHECK_false); | |
644 } | |
645 | |
3404 | 646 // relocate jsrs and link methods after they are all rewritten |
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647 this_oop->link_methods(CHECK_false); |
3404 | 648 |
0 | 649 // Initialize the vtable and interface table after |
650 // methods have been rewritten since rewrite may | |
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651 // fabricate new Method*s. |
0 | 652 // also does loader constraint checking |
653 if (!this_oop()->is_shared()) { | |
654 ResourceMark rm(THREAD); | |
655 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
656 this_oop->itable()->initialize_itable(true, CHECK_false); | |
657 } | |
658 #ifdef ASSERT | |
659 else { | |
660 ResourceMark rm(THREAD); | |
661 this_oop->vtable()->verify(tty, true); | |
662 // In case itable verification is ever added. | |
663 // this_oop->itable()->verify(tty, true); | |
664 } | |
665 #endif | |
666 this_oop->set_init_state(linked); | |
667 if (JvmtiExport::should_post_class_prepare()) { | |
668 Thread *thread = THREAD; | |
669 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
670 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
671 } | |
672 } | |
673 } | |
674 return true; | |
675 } | |
676 | |
677 | |
678 // Rewrite the byte codes of all of the methods of a class. | |
679 // The rewriter must be called exactly once. Rewriting must happen after | |
680 // verification but before the first method of the class is executed. | |
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681 void InstanceKlass::rewrite_class(TRAPS) { |
0 | 682 assert(is_loaded(), "must be loaded"); |
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683 instanceKlassHandle this_oop(THREAD, this); |
0 | 684 if (this_oop->is_rewritten()) { |
685 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
686 return; | |
687 } | |
3404 | 688 Rewriter::rewrite(this_oop, CHECK); |
0 | 689 this_oop->set_rewritten(); |
690 } | |
691 | |
3404 | 692 // Now relocate and link method entry points after class is rewritten. |
693 // This is outside is_rewritten flag. In case of an exception, it can be | |
694 // executed more than once. | |
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695 void InstanceKlass::link_methods(TRAPS) { |
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696 int len = methods()->length(); |
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697 for (int i = len-1; i >= 0; i--) { |
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698 methodHandle m(THREAD, methods()->at(i)); |
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699 |
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700 // Set up method entry points for compiler and interpreter . |
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701 m->link_method(m, CHECK); |
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702 |
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703 // This is for JVMTI and unrelated to relocator but the last thing we do |
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704 #ifdef ASSERT |
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705 if (StressMethodComparator) { |
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706 ResourceMark rm(THREAD); |
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707 static int nmc = 0; |
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708 for (int j = i; j >= 0 && j >= i-4; j--) { |
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709 if ((++nmc % 1000) == 0) tty->print_cr("Have run MethodComparator %d times...", nmc); |
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710 bool z = MethodComparator::methods_EMCP(m(), |
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711 methods()->at(j)); |
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712 if (j == i && !z) { |
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713 tty->print("MethodComparator FAIL: "); m->print(); m->print_codes(); |
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714 assert(z, "method must compare equal to itself"); |
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715 } |
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716 } |
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717 } |
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718 #endif //ASSERT |
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719 } |
3404 | 720 } |
721 | |
0 | 722 |
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723 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
0 | 724 // Make sure klass is linked (verified) before initialization |
725 // A class could already be verified, since it has been reflected upon. | |
726 this_oop->link_class(CHECK); | |
727 | |
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728 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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729 |
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730 bool wait = false; |
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731 |
0 | 732 // refer to the JVM book page 47 for description of steps |
733 // Step 1 | |
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734 { |
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735 volatile oop init_lock = this_oop->init_lock(); |
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736 ObjectLocker ol(init_lock, THREAD); |
0 | 737 |
738 Thread *self = THREAD; // it's passed the current thread | |
739 | |
740 // Step 2 | |
741 // If we were to use wait() instead of waitInterruptibly() then | |
742 // we might end up throwing IE from link/symbol resolution sites | |
743 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
744 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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745 wait = true; |
0 | 746 ol.waitUninterruptibly(CHECK); |
747 } | |
748 | |
749 // Step 3 | |
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750 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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751 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 752 return; |
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753 } |
0 | 754 |
755 // Step 4 | |
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756 if (this_oop->is_initialized()) { |
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757 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 758 return; |
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759 } |
0 | 760 |
761 // Step 5 | |
762 if (this_oop->is_in_error_state()) { | |
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763 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 764 ResourceMark rm(THREAD); |
765 const char* desc = "Could not initialize class "; | |
766 const char* className = this_oop->external_name(); | |
767 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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768 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 769 if (NULL == message) { |
770 // Out of memory: can't create detailed error message | |
771 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
772 } else { | |
773 jio_snprintf(message, msglen, "%s%s", desc, className); | |
774 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
775 } | |
776 } | |
777 | |
778 // Step 6 | |
779 this_oop->set_init_state(being_initialized); | |
780 this_oop->set_init_thread(self); | |
781 } | |
782 | |
783 // Step 7 | |
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784 Klass* super_klass = this_oop->super(); |
6983 | 785 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
786 super_klass->initialize(THREAD); | |
0 | 787 |
788 if (HAS_PENDING_EXCEPTION) { | |
789 Handle e(THREAD, PENDING_EXCEPTION); | |
790 CLEAR_PENDING_EXCEPTION; | |
791 { | |
792 EXCEPTION_MARK; | |
793 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
794 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
795 } | |
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796 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 797 THROW_OOP(e()); |
798 } | |
799 } | |
800 | |
6934 | 801 if (this_oop->has_default_methods()) { |
802 // Step 7.5: initialize any interfaces which have default methods | |
803 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
804 Klass* iface = this_oop->local_interfaces()->at(i); | |
805 InstanceKlass* ik = InstanceKlass::cast(iface); | |
806 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
807 ik->initialize(THREAD); | |
808 | |
809 if (HAS_PENDING_EXCEPTION) { | |
810 Handle e(THREAD, PENDING_EXCEPTION); | |
811 CLEAR_PENDING_EXCEPTION; | |
812 { | |
813 EXCEPTION_MARK; | |
814 // Locks object, set state, and notify all waiting threads | |
815 this_oop->set_initialization_state_and_notify( | |
816 initialization_error, THREAD); | |
817 | |
818 // ignore any exception thrown, superclass initialization error is | |
819 // thrown below | |
820 CLEAR_PENDING_EXCEPTION; | |
821 } | |
822 DTRACE_CLASSINIT_PROBE_WAIT( | |
823 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
824 THROW_OOP(e()); | |
825 } | |
826 } | |
827 } | |
828 } | |
829 | |
0 | 830 // Step 8 |
831 { | |
832 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
833 JavaThread* jt = (JavaThread*)THREAD; | |
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834 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 835 // Timer includes any side effects of class initialization (resolution, |
836 // etc), but not recursive entry into call_class_initializer(). | |
875
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837 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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838 ClassLoader::perf_class_init_selftime(), |
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839 ClassLoader::perf_classes_inited(), |
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840 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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841 jt->get_thread_stat()->perf_timers_addr(), |
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842 PerfClassTraceTime::CLASS_CLINIT); |
0 | 843 this_oop->call_class_initializer(THREAD); |
844 } | |
845 | |
846 // Step 9 | |
847 if (!HAS_PENDING_EXCEPTION) { | |
848 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
849 { ResourceMark rm(THREAD); | |
850 debug_only(this_oop->vtable()->verify(tty, true);) | |
851 } | |
852 } | |
853 else { | |
854 // Step 10 and 11 | |
855 Handle e(THREAD, PENDING_EXCEPTION); | |
856 CLEAR_PENDING_EXCEPTION; | |
857 { | |
858 EXCEPTION_MARK; | |
859 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
860 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
861 } | |
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862 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
1142 | 863 if (e->is_a(SystemDictionary::Error_klass())) { |
0 | 864 THROW_OOP(e()); |
865 } else { | |
866 JavaCallArguments args(e); | |
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867 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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868 vmSymbols::throwable_void_signature(), |
0 | 869 &args); |
870 } | |
871 } | |
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872 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 873 } |
874 | |
875 | |
876 // Note: implementation moved to static method to expose the this pointer. | |
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877 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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878 instanceKlassHandle kh(THREAD, this); |
0 | 879 set_initialization_state_and_notify_impl(kh, state, CHECK); |
880 } | |
881 | |
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882 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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883 volatile oop init_lock = this_oop->init_lock(); |
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884 ObjectLocker ol(init_lock, THREAD); |
0 | 885 this_oop->set_init_state(state); |
886 ol.notify_all(CHECK); | |
887 } | |
888 | |
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889 // The embedded _implementor field can only record one implementor. |
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890 // When there are more than one implementors, the _implementor field |
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891 // is set to the interface Klass* itself. Following are the possible |
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892 // values for the _implementor field: |
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893 // NULL - no implementor |
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894 // implementor Klass* - one implementor |
5998
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895 // self - more than one implementor |
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896 // |
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897 // The _implementor field only exists for interfaces. |
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898 void InstanceKlass::add_implementor(Klass* k) { |
0 | 899 assert(Compile_lock->owned_by_self(), ""); |
5998
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900 assert(is_interface(), "not interface"); |
0 | 901 // Filter out my subinterfaces. |
902 // (Note: Interfaces are never on the subklass list.) | |
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903 if (InstanceKlass::cast(k)->is_interface()) return; |
0 | 904 |
905 // Filter out subclasses whose supers already implement me. | |
906 // (Note: CHA must walk subclasses of direct implementors | |
907 // in order to locate indirect implementors.) | |
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908 Klass* sk = InstanceKlass::cast(k)->super(); |
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909 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
0 | 910 // We only need to check one immediate superclass, since the |
911 // implements_interface query looks at transitive_interfaces. | |
912 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
913 return; | |
914 | |
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915 Klass* ik = implementor(); |
5998
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916 if (ik == NULL) { |
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917 set_implementor(k); |
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918 } else if (ik != this) { |
5998
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919 // There is already an implementor. Use itself as an indicator of |
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920 // more than one implementors. |
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921 set_implementor(this); |
0 | 922 } |
923 | |
924 // The implementor also implements the transitive_interfaces | |
925 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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926 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
0 | 927 } |
928 } | |
929 | |
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930 void InstanceKlass::init_implementor() { |
5998
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931 if (is_interface()) { |
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932 set_implementor(NULL); |
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933 } |
0 | 934 } |
935 | |
936 | |
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937 void InstanceKlass::process_interfaces(Thread *thread) { |
0 | 938 // link this class into the implementors list of every interface it implements |
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939 Klass* this_as_klass_oop = this; |
0 | 940 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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941 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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942 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
0 | 943 assert(interf->is_interface(), "expected interface"); |
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944 interf->add_implementor(this_as_klass_oop); |
0 | 945 } |
946 } | |
947 | |
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948 bool InstanceKlass::can_be_primary_super_slow() const { |
0 | 949 if (is_interface()) |
950 return false; | |
951 else | |
952 return Klass::can_be_primary_super_slow(); | |
953 } | |
954 | |
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955 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
0 | 956 // The secondaries are the implemented interfaces. |
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957 InstanceKlass* ik = InstanceKlass::cast(this); |
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958 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
0 | 959 int num_secondaries = num_extra_slots + interfaces->length(); |
960 if (num_secondaries == 0) { | |
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961 // Must share this for correct bootstrapping! |
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962 set_secondary_supers(Universe::the_empty_klass_array()); |
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963 return NULL; |
0 | 964 } else if (num_extra_slots == 0) { |
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965 // The secondary super list is exactly the same as the transitive interfaces. |
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966 // Redefine classes has to be careful not to delete this! |
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967 set_secondary_supers(interfaces); |
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968 return NULL; |
0 | 969 } else { |
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970 // Copy transitive interfaces to a temporary growable array to be constructed |
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971 // into the secondary super list with extra slots. |
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972 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
0 | 973 for (int i = 0; i < interfaces->length(); i++) { |
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974 secondaries->push(interfaces->at(i)); |
0 | 975 } |
976 return secondaries; | |
977 } | |
978 } | |
979 | |
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980 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
6983 | 981 if (k->is_interface()) { |
0 | 982 return implements_interface(k); |
983 } else { | |
984 return Klass::compute_is_subtype_of(k); | |
985 } | |
986 } | |
987 | |
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988 bool InstanceKlass::implements_interface(Klass* k) const { |
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989 if (this == k) return true; |
6983 | 990 assert(k->is_interface(), "should be an interface class"); |
0 | 991 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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992 if (transitive_interfaces()->at(i) == k) { |
0 | 993 return true; |
994 } | |
995 } | |
996 return false; | |
997 } | |
998 | |
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999 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
0 | 1000 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
1001 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
876
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1002 report_java_out_of_memory("Requested array size exceeds VM limit"); |
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1003 JvmtiExport::post_array_size_exhausted(); |
0 | 1004 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
1005 } | |
1006 int size = objArrayOopDesc::object_size(length); | |
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1007 Klass* ak = array_klass(n, CHECK_NULL); |
0 | 1008 KlassHandle h_ak (THREAD, ak); |
1009 objArrayOop o = | |
1010 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
1011 return o; | |
1012 } | |
1013 | |
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1014 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
0 | 1015 if (TraceFinalizerRegistration) { |
1016 tty->print("Registered "); | |
1017 i->print_value_on(tty); | |
1018 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
1019 } | |
1020 instanceHandle h_i(THREAD, i); | |
1021 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
1022 JavaValue result(T_VOID); | |
1023 JavaCallArguments args(h_i); | |
1024 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
1025 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
1026 return h_i(); | |
1027 } | |
1028 | |
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1029 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
0 | 1030 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
1031 int size = size_helper(); // Query before forming handle. | |
1032 | |
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1033 KlassHandle h_k(THREAD, this); |
0 | 1034 |
1035 instanceOop i; | |
1036 | |
1037 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
1038 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
1039 i = register_finalizer(i, CHECK_NULL); | |
1040 } | |
1041 return i; | |
1042 } | |
1043 | |
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1044 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
0 | 1045 if (is_interface() || is_abstract()) { |
1046 ResourceMark rm(THREAD); | |
1047 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
1048 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
1049 } | |
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1050 if (this == SystemDictionary::Class_klass()) { |
0 | 1051 ResourceMark rm(THREAD); |
1052 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
1053 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
1054 } | |
1055 } | |
1056 | |
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1057 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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1058 instanceKlassHandle this_oop(THREAD, this); |
0 | 1059 return array_klass_impl(this_oop, or_null, n, THREAD); |
1060 } | |
1061 | |
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1062 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
0 | 1063 if (this_oop->array_klasses() == NULL) { |
1064 if (or_null) return NULL; | |
1065 | |
1066 ResourceMark rm; | |
1067 JavaThread *jt = (JavaThread *)THREAD; | |
1068 { | |
1069 // Atomic creation of array_klasses | |
1070 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
1071 MutexLocker ma(MultiArray_lock, THREAD); | |
1072 | |
1073 // Check if update has already taken place | |
1074 if (this_oop->array_klasses() == NULL) { | |
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1075 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
0 | 1076 this_oop->set_array_klasses(k); |
1077 } | |
1078 } | |
1079 } | |
1080 // _this will always be set at this point | |
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1081 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
0 | 1082 if (or_null) { |
1083 return oak->array_klass_or_null(n); | |
1084 } | |
1085 return oak->array_klass(n, CHECK_NULL); | |
1086 } | |
1087 | |
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1088 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
0 | 1089 return array_klass_impl(or_null, 1, THREAD); |
1090 } | |
1091 | |
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1092 void InstanceKlass::call_class_initializer(TRAPS) { |
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1093 instanceKlassHandle ik (THREAD, this); |
0 | 1094 call_class_initializer_impl(ik, THREAD); |
1095 } | |
1096 | |
1097 static int call_class_initializer_impl_counter = 0; // for debugging | |
1098 | |
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1099 Method* InstanceKlass::class_initializer() { |
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1100 Method* clinit = find_method( |
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1101 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1102 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1103 return clinit; |
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1104 } |
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1105 return NULL; |
0 | 1106 } |
1107 | |
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1108 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1109 if (ReplayCompiles && |
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1110 (ReplaySuppressInitializers == 1 || |
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1111 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1112 // Hide the existence of the initializer for the purpose of replaying the compile |
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1113 return; |
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1114 } |
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1115 |
0 | 1116 methodHandle h_method(THREAD, this_oop->class_initializer()); |
1117 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
1118 if (TraceClassInitialization) { | |
1119 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
1120 this_oop->name()->print_value(); | |
1121 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
1122 } | |
1123 if (h_method() != NULL) { | |
1124 JavaCallArguments args; // No arguments | |
1125 JavaValue result(T_VOID); | |
1126 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
1127 } | |
1128 } | |
1129 | |
1130 | |
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1131 void InstanceKlass::mask_for(methodHandle method, int bci, |
0 | 1132 InterpreterOopMap* entry_for) { |
1133 // Dirty read, then double-check under a lock. | |
1134 if (_oop_map_cache == NULL) { | |
1135 // Otherwise, allocate a new one. | |
1136 MutexLocker x(OopMapCacheAlloc_lock); | |
1137 // First time use. Allocate a cache in C heap | |
1138 if (_oop_map_cache == NULL) { | |
1139 _oop_map_cache = new OopMapCache(); | |
1140 } | |
1141 } | |
1142 // _oop_map_cache is constant after init; lookup below does is own locking. | |
1143 _oop_map_cache->lookup(method, bci, entry_for); | |
1144 } | |
1145 | |
1146 | |
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1147 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1148 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1149 Symbol* f_name = fs.name(); |
1150 Symbol* f_sig = fs.signature(); | |
0 | 1151 if (f_name == name && f_sig == sig) { |
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1152 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1153 return true; |
1154 } | |
1155 } | |
1156 return false; | |
1157 } | |
1158 | |
1159 | |
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1160 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1161 const int n = local_interfaces()->length(); |
1162 for (int i = 0; i < n; i++) { | |
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1163 Klass* intf1 = local_interfaces()->at(i); |
6983 | 1164 assert(intf1->is_interface(), "just checking type"); |
0 | 1165 // search for field in current interface |
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1166 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
0 | 1167 assert(fd->is_static(), "interface field must be static"); |
1168 return intf1; | |
1169 } | |
1170 // search for field in direct superinterfaces | |
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1171 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
0 | 1172 if (intf2 != NULL) return intf2; |
1173 } | |
1174 // otherwise field lookup fails | |
1175 return NULL; | |
1176 } | |
1177 | |
1178 | |
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1179 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1180 // search order according to newest JVM spec (5.4.3.2, p.167). |
1181 // 1) search for field in current klass | |
1182 if (find_local_field(name, sig, fd)) { | |
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1183 return const_cast<InstanceKlass*>(this); |
0 | 1184 } |
1185 // 2) search for field recursively in direct superinterfaces | |
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1186 { Klass* intf = find_interface_field(name, sig, fd); |
0 | 1187 if (intf != NULL) return intf; |
1188 } | |
1189 // 3) apply field lookup recursively if superclass exists | |
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1190 { Klass* supr = super(); |
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1191 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
0 | 1192 } |
1193 // 4) otherwise field lookup fails | |
1194 return NULL; | |
1195 } | |
1196 | |
1197 | |
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1198 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
0 | 1199 // search order according to newest JVM spec (5.4.3.2, p.167). |
1200 // 1) search for field in current klass | |
1201 if (find_local_field(name, sig, fd)) { | |
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1202 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
0 | 1203 } |
1204 // 2) search for field recursively in direct superinterfaces | |
1205 if (is_static) { | |
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1206 Klass* intf = find_interface_field(name, sig, fd); |
0 | 1207 if (intf != NULL) return intf; |
1208 } | |
1209 // 3) apply field lookup recursively if superclass exists | |
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1210 { Klass* supr = super(); |
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1211 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
0 | 1212 } |
1213 // 4) otherwise field lookup fails | |
1214 return NULL; | |
1215 } | |
1216 | |
1217 | |
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1218 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1219 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1220 if (fs.offset() == offset) { |
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1221 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1222 if (fd->is_static() == is_static) return true; |
1223 } | |
1224 } | |
1225 return false; | |
1226 } | |
1227 | |
1228 | |
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1229 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1230 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1231 while (klass != NULL) { |
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1232 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
0 | 1233 return true; |
1234 } | |
6983 | 1235 klass = klass->super(); |
0 | 1236 } |
1237 return false; | |
1238 } | |
1239 | |
1240 | |
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1241 void InstanceKlass::methods_do(void f(Method* method)) { |
0 | 1242 int len = methods()->length(); |
1243 for (int index = 0; index < len; index++) { | |
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1244 Method* m = methods()->at(index); |
0 | 1245 assert(m->is_method(), "must be method"); |
1246 f(m); | |
1247 } | |
1248 } | |
1249 | |
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1250 |
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1251 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
3938 | 1252 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
1253 if (fs.access_flags().is_static()) { | |
1254 fieldDescriptor fd; | |
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1255 fd.initialize(this, fs.index()); |
3938 | 1256 cl->do_field(&fd); |
1257 } | |
0 | 1258 } |
1259 } | |
1260 | |
1261 | |
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1262 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1263 instanceKlassHandle h_this(THREAD, this); |
0 | 1264 do_local_static_fields_impl(h_this, f, CHECK); |
1265 } | |
1266 | |
1267 | |
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1268 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
3938 | 1269 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
1270 if (fs.access_flags().is_static()) { | |
1271 fieldDescriptor fd; | |
1272 fd.initialize(this_oop(), fs.index()); | |
1273 f(&fd, CHECK); | |
1274 } | |
0 | 1275 } |
1276 } | |
1277 | |
1278 | |
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1279 static int compare_fields_by_offset(int* a, int* b) { |
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1280 return a[0] - b[0]; |
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1281 } |
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1282 |
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1283 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1284 InstanceKlass* super = superklass(); |
0 | 1285 if (super != NULL) { |
1286 super->do_nonstatic_fields(cl); | |
1287 } | |
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1288 fieldDescriptor fd; |
3938 | 1289 int length = java_fields_count(); |
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1290 // In DebugInfo nonstatic fields are sorted by offset. |
6197 | 1291 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
44
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1292 int j = 0; |
3938 | 1293 for (int i = 0; i < length; i += 1) { |
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1294 fd.initialize(this, i); |
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1295 if (!fd.is_static()) { |
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1296 fields_sorted[j + 0] = fd.offset(); |
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1297 fields_sorted[j + 1] = i; |
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1298 j += 2; |
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1299 } |
0 | 1300 } |
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1301 if (j > 0) { |
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1302 length = j; |
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1303 // _sort_Fn is defined in growableArray.hpp. |
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1304 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1305 for (int i = 0; i < length; i += 2) { |
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1306 fd.initialize(this, fields_sorted[i + 1]); |
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1307 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1308 cl->do_field(&fd); |
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1309 } |
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1310 } |
6197 | 1311 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
0 | 1312 } |
1313 | |
1314 | |
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1315 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1316 if (array_klasses() != NULL) |
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1317 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1318 } |
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1319 |
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1320 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
0 | 1321 if (array_klasses() != NULL) |
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1322 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
0 | 1323 } |
1324 | |
1325 #ifdef ASSERT | |
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1326 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
0 | 1327 int len = methods->length(); |
1328 for (int index = 0; index < len; index++) { | |
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1329 Method* m = methods->at(index); |
0 | 1330 assert(m->is_method(), "must be method"); |
1331 if (m->signature() == signature && m->name() == name) { | |
1332 return index; | |
1333 } | |
1334 } | |
1335 return -1; | |
1336 } | |
1337 #endif | |
1338 | |
6934 | 1339 static int binary_search(Array<Method*>* methods, Symbol* name) { |
0 | 1340 int len = methods->length(); |
1341 // methods are sorted, so do binary search | |
1342 int l = 0; | |
1343 int h = len - 1; | |
1344 while (l <= h) { | |
1345 int mid = (l + h) >> 1; | |
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1346 Method* m = methods->at(mid); |
0 | 1347 assert(m->is_method(), "must be method"); |
1348 int res = m->name()->fast_compare(name); | |
1349 if (res == 0) { | |
6934 | 1350 return mid; |
0 | 1351 } else if (res < 0) { |
1352 l = mid + 1; | |
1353 } else { | |
1354 h = mid - 1; | |
1355 } | |
1356 } | |
6934 | 1357 return -1; |
1358 } | |
1359 | |
1360 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
1361 return InstanceKlass::find_method(methods(), name, signature); | |
1362 } | |
1363 | |
1364 Method* InstanceKlass::find_method( | |
1365 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
1366 int hit = binary_search(methods, name); | |
1367 if (hit != -1) { | |
1368 Method* m = methods->at(hit); | |
1369 // Do linear search to find matching signature. First, quick check | |
1370 // for common case | |
1371 if (m->signature() == signature) return m; | |
1372 // search downwards through overloaded methods | |
1373 int i; | |
1374 for (i = hit - 1; i >= 0; --i) { | |
1375 Method* m = methods->at(i); | |
1376 assert(m->is_method(), "must be method"); | |
1377 if (m->name() != name) break; | |
1378 if (m->signature() == signature) return m; | |
1379 } | |
1380 // search upwards | |
1381 for (i = hit + 1; i < methods->length(); ++i) { | |
1382 Method* m = methods->at(i); | |
1383 assert(m->is_method(), "must be method"); | |
1384 if (m->name() != name) break; | |
1385 if (m->signature() == signature) return m; | |
1386 } | |
1387 // not found | |
0 | 1388 #ifdef ASSERT |
6934 | 1389 int index = linear_search(methods, name, signature); |
1390 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
0 | 1391 #endif |
6934 | 1392 } |
0 | 1393 return NULL; |
1394 } | |
1395 | |
6934 | 1396 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
1397 return find_method_by_name(methods(), name, end); | |
1398 } | |
1399 | |
1400 int InstanceKlass::find_method_by_name( | |
1401 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
1402 assert(end_ptr != NULL, "just checking"); | |
1403 int start = binary_search(methods, name); | |
1404 int end = start + 1; | |
1405 if (start != -1) { | |
1406 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
1407 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
1408 *end_ptr = end; | |
1409 return start; | |
1410 } | |
1411 return -1; | |
1412 } | |
1413 | |
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1414 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1415 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1416 while (klass != NULL) { |
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1417 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
0 | 1418 if (method != NULL) return method; |
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1419 klass = InstanceKlass::cast(klass)->super(); |
0 | 1420 } |
1421 return NULL; | |
1422 } | |
1423 | |
1424 // lookup a method in all the interfaces that this class implements | |
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1425 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
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1426 Symbol* signature) const { |
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1427 Array<Klass*>* all_ifs = transitive_interfaces(); |
0 | 1428 int num_ifs = all_ifs->length(); |
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1429 InstanceKlass *ik = NULL; |
0 | 1430 for (int i = 0; i < num_ifs; i++) { |
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1431 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1432 Method* m = ik->lookup_method(name, signature); |
0 | 1433 if (m != NULL) { |
1434 return m; | |
1435 } | |
1436 } | |
1437 return NULL; | |
1438 } | |
1439 | |
1440 /* jni_id_for_impl for jfieldIds only */ | |
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1441 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
0 | 1442 MutexLocker ml(JfieldIdCreation_lock); |
1443 // Retry lookup after we got the lock | |
1444 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
1445 if (probe == NULL) { | |
1446 // Slow case, allocate new static field identifier | |
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1447 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
0 | 1448 this_oop->set_jni_ids(probe); |
1449 } | |
1450 return probe; | |
1451 } | |
1452 | |
1453 | |
1454 /* jni_id_for for jfieldIds only */ | |
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1455 JNIid* InstanceKlass::jni_id_for(int offset) { |
0 | 1456 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
1457 if (probe == NULL) { | |
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1458 probe = jni_id_for_impl(this, offset); |
0 | 1459 } |
1460 return probe; | |
1461 } | |
1462 | |
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1463 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1464 Array<jushort>* inner_class_list = inner_classes(); |
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1465 if (inner_class_list == NULL) { |
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1466 return 0; |
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1467 } |
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1468 int length = inner_class_list->length(); |
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1469 if (length % inner_class_next_offset == 0) { |
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1470 return 0; |
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1471 } else { |
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1472 int index = length - enclosing_method_attribute_size; |
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1473 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1474 return inner_class_list->at(index + offset); |
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1475 } |
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1476 } |
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1477 |
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1478 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
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1479 u2 method_index) { |
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1480 Array<jushort>* inner_class_list = inner_classes(); |
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1481 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1482 int length = inner_class_list->length(); |
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1483 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1484 int index = length - enclosing_method_attribute_size; |
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1485 inner_class_list->at_put( |
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1486 index + enclosing_method_class_index_offset, class_index); |
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1487 inner_class_list->at_put( |
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1488 index + enclosing_method_method_index_offset, method_index); |
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1489 } |
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1490 } |
0 | 1491 |
1492 // Lookup or create a jmethodID. | |
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1493 // This code is called by the VMThread and JavaThreads so the |
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1494 // locking has to be done very carefully to avoid deadlocks |
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1495 // and/or other cache consistency problems. |
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1496 // |
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1497 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
0 | 1498 size_t idnum = (size_t)method_h->method_idnum(); |
1499 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
1500 size_t length = 0; | |
1501 jmethodID id = NULL; | |
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1502 |
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1503 // We use a double-check locking idiom here because this cache is |
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1504 // performance sensitive. In the normal system, this cache only |
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1505 // transitions from NULL to non-NULL which is safe because we use |
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1506 // release_set_methods_jmethod_ids() to advertise the new cache. |
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1507 // A partially constructed cache should never be seen by a racing |
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1508 // thread. We also use release_store_ptr() to save a new jmethodID |
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1509 // in the cache so a partially constructed jmethodID should never be |
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1510 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1511 // lock, but cache writes of a new jmethodID requires uniqueness and |
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1512 // creation of the cache itself requires no leaks so a lock is |
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1513 // generally acquired in those two cases. |
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1514 // |
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1515 // If the RedefineClasses() API has been used, then this cache can |
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1516 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1517 // Cache creation requires no leaks and we require safety between all |
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1518 // cache accesses and freeing of the old cache so a lock is generally |
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1519 // acquired when the RedefineClasses() API has been used. |
0 | 1520 |
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1521 if (jmeths != NULL) { |
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1522 // the cache already exists |
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1523 if (!ik_h->idnum_can_increment()) { |
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1524 // the cache can't grow so we can just get the current values |
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1525 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1526 } else { |
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1527 // cache can grow so we have to be more careful |
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1528 if (Threads::number_of_threads() == 0 || |
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1529 SafepointSynchronize::is_at_safepoint()) { |
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1530 // we're single threaded or at a safepoint - no locking needed |
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1531 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1532 } else { |
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1533 MutexLocker ml(JmethodIdCreation_lock); |
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1534 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1535 } |
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1536 } |
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1537 } |
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1538 // implied else: |
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1539 // we need to allocate a cache so default length and id values are good |
0 | 1540 |
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1541 if (jmeths == NULL || // no cache yet |
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1542 length <= idnum || // cache is too short |
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1543 id == NULL) { // cache doesn't contain entry |
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1544 |
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1545 // This function can be called by the VMThread so we have to do all |
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1546 // things that might block on a safepoint before grabbing the lock. |
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1547 // Otherwise, we can deadlock with the VMThread or have a cache |
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1548 // consistency issue. These vars keep track of what we might have |
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1549 // to free after the lock is dropped. |
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1550 jmethodID to_dealloc_id = NULL; |
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1551 jmethodID* to_dealloc_jmeths = NULL; |
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1552 |
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1553 // may not allocate new_jmeths or use it if we allocate it |
0 | 1554 jmethodID* new_jmeths = NULL; |
1555 if (length <= idnum) { | |
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1556 // allocate a new cache that might be used |
0 | 1557 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
6197 | 1558 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
0 | 1559 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
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1560 // cache size is stored in element[0], other elements offset by one |
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1561 new_jmeths[0] = (jmethodID)size; |
0 | 1562 } |
1563 | |
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1564 // allocate a new jmethodID that might be used |
0 | 1565 jmethodID new_id = NULL; |
1566 if (method_h->is_old() && !method_h->is_obsolete()) { | |
1567 // The method passed in is old (but not obsolete), we need to use the current version | |
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1568 Method* current_method = ik_h->method_with_idnum((int)idnum); |
0 | 1569 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
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1570 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
0 | 1571 } else { |
1572 // It is the current version of the method or an obsolete method, | |
1573 // use the version passed in | |
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1574 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
0 | 1575 } |
1576 | |
977
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1577 if (Threads::number_of_threads() == 0 || |
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1578 SafepointSynchronize::is_at_safepoint()) { |
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1579 // we're single threaded or at a safepoint - no locking needed |
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1580 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1581 &to_dealloc_id, &to_dealloc_jmeths); |
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1582 } else { |
0 | 1583 MutexLocker ml(JmethodIdCreation_lock); |
977
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1584 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1585 &to_dealloc_id, &to_dealloc_jmeths); |
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1586 } |
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1587 |
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1588 // The lock has been dropped so we can free resources. |
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1589 // Free up either the old cache or the new cache if we allocated one. |
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1590 if (to_dealloc_jmeths != NULL) { |
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1591 FreeHeap(to_dealloc_jmeths); |
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1592 } |
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1593 // free up the new ID since it wasn't needed |
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1594 if (to_dealloc_id != NULL) { |
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1595 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
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1596 } |
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1597 } |
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1598 return id; |
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1599 } |
0 | 1600 |
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1601 |
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1602 // Common code to fetch the jmethodID from the cache or update the |
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1603 // cache with the new jmethodID. This function should never do anything |
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1604 // that causes the caller to go to a safepoint or we can deadlock with |
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1605 // the VMThread or have cache consistency issues. |
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1606 // |
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1607 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
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1608 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
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1609 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
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1610 jmethodID** to_dealloc_jmeths_p) { |
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1611 assert(new_id != NULL, "sanity check"); |
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1612 assert(to_dealloc_id_p != NULL, "sanity check"); |
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1613 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
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1614 assert(Threads::number_of_threads() == 0 || |
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1615 SafepointSynchronize::is_at_safepoint() || |
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1616 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
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1617 |
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1618 // reacquire the cache - we are locked, single threaded or at a safepoint |
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1619 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
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1620 jmethodID id = NULL; |
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1621 size_t length = 0; |
0 | 1622 |
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1623 if (jmeths == NULL || // no cache yet |
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1624 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
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1625 if (jmeths != NULL) { |
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1626 // copy any existing entries from the old cache |
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1627 for (size_t index = 0; index < length; index++) { |
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1628 new_jmeths[index+1] = jmeths[index+1]; |
0 | 1629 } |
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1630 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
0 | 1631 } |
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1632 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
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1633 } else { |
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1634 // fetch jmethodID (if any) from the existing cache |
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1635 id = jmeths[idnum+1]; |
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1636 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
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1637 } |
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1638 if (id == NULL) { |
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1639 // No matching jmethodID in the existing cache or we have a new |
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1640 // cache or we just grew the cache. This cache write is done here |
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1641 // by the first thread to win the foot race because a jmethodID |
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1642 // needs to be unique once it is generally available. |
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1643 id = new_id; |
977
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1644 |
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1645 // The jmethodID cache can be read while unlocked so we have to |
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1646 // make sure the new jmethodID is complete before installing it |
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1647 // in the cache. |
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1648 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
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1649 } else { |
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1650 *to_dealloc_id_p = new_id; // save new id for later delete |
0 | 1651 } |
1652 return id; | |
1653 } | |
1654 | |
1655 | |
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1656 // Common code to get the jmethodID cache length and the jmethodID |
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1657 // value at index idnum if there is one. |
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1658 // |
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1659 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
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1660 size_t idnum, size_t *length_p, jmethodID* id_p) { |
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1661 assert(cache != NULL, "sanity check"); |
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1662 assert(length_p != NULL, "sanity check"); |
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1663 assert(id_p != NULL, "sanity check"); |
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1664 |
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1665 // cache size is stored in element[0], other elements offset by one |
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1666 *length_p = (size_t)cache[0]; |
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1667 if (*length_p <= idnum) { // cache is too short |
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1668 *id_p = NULL; |
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1669 } else { |
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1670 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1671 } |
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1672 } |
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1673 |
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1674 |
0 | 1675 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
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1676 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
0 | 1677 size_t idnum = (size_t)method->method_idnum(); |
1678 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
1679 size_t length; // length assigned as debugging crumb | |
1680 jmethodID id = NULL; | |
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1681 if (jmeths != NULL && // If there is a cache |
0 | 1682 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
1683 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
1684 } | |
1685 return id; | |
1686 } | |
1687 | |
1688 | |
1689 // Cache an itable index | |
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1690 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
0 | 1691 int* indices = methods_cached_itable_indices_acquire(); |
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1692 int* to_dealloc_indices = NULL; |
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1693 |
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1694 // We use a double-check locking idiom here because this cache is |
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1695 // performance sensitive. In the normal system, this cache only |
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1696 // transitions from NULL to non-NULL which is safe because we use |
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1697 // release_set_methods_cached_itable_indices() to advertise the |
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1698 // new cache. A partially constructed cache should never be seen |
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1699 // by a racing thread. Cache reads and writes proceed without a |
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1700 // lock, but creation of the cache itself requires no leaks so a |
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1701 // lock is generally acquired in that case. |
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1702 // |
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1703 // If the RedefineClasses() API has been used, then this cache can |
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1704 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1705 // Cache creation requires no leaks and we require safety between all |
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1706 // cache accesses and freeing of the old cache so a lock is generally |
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1707 // acquired when the RedefineClasses() API has been used. |
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1708 |
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1709 if (indices == NULL || idnum_can_increment()) { |
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1710 // we need a cache or the cache can grow |
0 | 1711 MutexLocker ml(JNICachedItableIndex_lock); |
977
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1712 // reacquire the cache to see if another thread already did the work |
0 | 1713 indices = methods_cached_itable_indices_acquire(); |
1714 size_t length = 0; | |
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1715 // cache size is stored in element[0], other elements offset by one |
0 | 1716 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
1717 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
6197 | 1718 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
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1719 new_indices[0] = (int)size; |
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1720 // copy any existing entries |
0 | 1721 size_t i; |
1722 for (i = 0; i < length; i++) { | |
1723 new_indices[i+1] = indices[i+1]; | |
1724 } | |
1725 // Set all the rest to -1 | |
1726 for (i = length; i < size; i++) { | |
1727 new_indices[i+1] = -1; | |
1728 } | |
1729 if (indices != NULL) { | |
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1730 // We have an old cache to delete so save it for after we |
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1731 // drop the lock. |
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1732 to_dealloc_indices = indices; |
0 | 1733 } |
1734 release_set_methods_cached_itable_indices(indices = new_indices); | |
1735 } | |
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1736 |
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1737 if (idnum_can_increment()) { |
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1738 // this cache can grow so we have to write to it safely |
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1739 indices[idnum+1] = index; |
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1740 } |
0 | 1741 } else { |
1742 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1743 } | |
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1744 |
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1745 if (!idnum_can_increment()) { |
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1746 // The cache cannot grow and this JNI itable index value does not |
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1747 // have to be unique like a jmethodID. If there is a race to set it, |
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1748 // it doesn't matter. |
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1749 indices[idnum+1] = index; |
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1750 } |
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1751 |
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1752 if (to_dealloc_indices != NULL) { |
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1753 // we allocated a new cache so free the old one |
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1754 FreeHeap(to_dealloc_indices); |
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1755 } |
0 | 1756 } |
1757 | |
1758 | |
1759 // Retrieve a cached itable index | |
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1760 int InstanceKlass::cached_itable_index(size_t idnum) { |
0 | 1761 int* indices = methods_cached_itable_indices_acquire(); |
1762 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
1763 // indices exist and are long enough, retrieve possible cached | |
1764 return indices[idnum+1]; | |
1765 } | |
1766 return -1; | |
1767 } | |
1768 | |
1769 | |
1770 // | |
1771 // Walk the list of dependent nmethods searching for nmethods which | |
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1772 // are dependent on the changes that were passed in and mark them for |
0 | 1773 // deoptimization. Returns the number of nmethods found. |
1774 // | |
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1775 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
0 | 1776 assert_locked_or_safepoint(CodeCache_lock); |
1777 int found = 0; | |
1778 nmethodBucket* b = _dependencies; | |
1779 while (b != NULL) { | |
1780 nmethod* nm = b->get_nmethod(); | |
1781 // since dependencies aren't removed until an nmethod becomes a zombie, | |
1782 // the dependency list may contain nmethods which aren't alive. | |
1783 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
1784 if (TraceDependencies) { | |
1785 ResourceMark rm; | |
1786 tty->print_cr("Marked for deoptimization"); | |
1787 tty->print_cr(" context = %s", this->external_name()); | |
1788 changes.print(); | |
1789 nm->print(); | |
1790 nm->print_dependencies(); | |
1791 } | |
1792 nm->mark_for_deoptimization(); | |
1793 found++; | |
1794 } | |
1795 b = b->next(); | |
1796 } | |
1797 return found; | |
1798 } | |
1799 | |
1800 | |
1801 // | |
1802 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
1803 // It's possible that an nmethod has multiple dependencies on this klass | |
1804 // so a count is kept for each bucket to guarantee that creation and | |
1805 // deletion of dependencies is consistent. | |
1806 // | |
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1807 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
0 | 1808 assert_locked_or_safepoint(CodeCache_lock); |
1809 nmethodBucket* b = _dependencies; | |
1810 nmethodBucket* last = NULL; | |
1811 while (b != NULL) { | |
1812 if (nm == b->get_nmethod()) { | |
1813 b->increment(); | |
1814 return; | |
1815 } | |
1816 b = b->next(); | |
1817 } | |
1818 _dependencies = new nmethodBucket(nm, _dependencies); | |
1819 } | |
1820 | |
1821 | |
1822 // | |
1823 // Decrement count of the nmethod in the dependency list and remove | |
1824 // the bucket competely when the count goes to 0. This method must | |
1825 // find a corresponding bucket otherwise there's a bug in the | |
1826 // recording of dependecies. | |
1827 // | |
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1828 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
0 | 1829 assert_locked_or_safepoint(CodeCache_lock); |
1830 nmethodBucket* b = _dependencies; | |
1831 nmethodBucket* last = NULL; | |
1832 while (b != NULL) { | |
1833 if (nm == b->get_nmethod()) { | |
1834 if (b->decrement() == 0) { | |
1835 if (last == NULL) { | |
1836 _dependencies = b->next(); | |
1837 } else { | |
1838 last->set_next(b->next()); | |
1839 } | |
1840 delete b; | |
1841 } | |
1842 return; | |
1843 } | |
1844 last = b; | |
1845 b = b->next(); | |
1846 } | |
1847 #ifdef ASSERT | |
1848 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
1849 nm->print(); | |
1850 #endif // ASSERT | |
1851 ShouldNotReachHere(); | |
1852 } | |
1853 | |
1854 | |
1855 #ifndef PRODUCT | |
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1856 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
0 | 1857 nmethodBucket* b = _dependencies; |
1858 int idx = 0; | |
1859 while (b != NULL) { | |
1860 nmethod* nm = b->get_nmethod(); | |
1861 tty->print("[%d] count=%d { ", idx++, b->count()); | |
1862 if (!verbose) { | |
1863 nm->print_on(tty, "nmethod"); | |
1864 tty->print_cr(" } "); | |
1865 } else { | |
1866 nm->print(); | |
1867 nm->print_dependencies(); | |
1868 tty->print_cr("--- } "); | |
1869 } | |
1870 b = b->next(); | |
1871 } | |
1872 } | |
1873 | |
1874 | |
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1875 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
0 | 1876 nmethodBucket* b = _dependencies; |
1877 while (b != NULL) { | |
1878 if (nm == b->get_nmethod()) { | |
1879 return true; | |
1880 } | |
1881 b = b->next(); | |
1882 } | |
1883 return false; | |
1884 } | |
1885 #endif //PRODUCT | |
1886 | |
1887 | |
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1888 // Garbage collection |
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1889 |
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1890 #ifdef ASSERT |
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1891 template <class T> void assert_is_in(T *p) { |
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1892 T heap_oop = oopDesc::load_heap_oop(p); |
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1893 if (!oopDesc::is_null(heap_oop)) { |
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1894 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1895 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1896 } |
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1897 } |
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1898 template <class T> void assert_is_in_closed_subset(T *p) { |
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1899 T heap_oop = oopDesc::load_heap_oop(p); |
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1900 if (!oopDesc::is_null(heap_oop)) { |
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1901 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1902 assert(Universe::heap()->is_in_closed_subset(o), |
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1903 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
113
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1904 } |
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1905 } |
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1906 template <class T> void assert_is_in_reserved(T *p) { |
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1907 T heap_oop = oopDesc::load_heap_oop(p); |
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1908 if (!oopDesc::is_null(heap_oop)) { |
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1909 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1910 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1911 } |
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1912 } |
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1913 template <class T> void assert_nothing(T *p) {} |
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1914 |
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1915 #else |
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1916 template <class T> void assert_is_in(T *p) {} |
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1917 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1918 template <class T> void assert_is_in_reserved(T *p) {} |
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1919 template <class T> void assert_nothing(T *p) {} |
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1920 #endif // ASSERT |
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1921 |
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1922 // |
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1923 // Macros that iterate over areas of oops which are specialized on type of |
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1924 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1925 // |
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1926 // Parameters are: |
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1927 // T - type of oop to point to (either oop or narrowOop) |
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1928 // start_p - starting pointer for region to iterate over |
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1929 // count - number of oops or narrowOops to iterate over |
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1930 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1931 // makes it more efficient to put in a macro rather than making |
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1932 // it a template function) |
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1933 // assert_fn - assert function which is template function because performance |
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1934 // doesn't matter when enabled. |
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1935 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1936 T, start_p, count, do_oop, \ |
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1937 assert_fn) \ |
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1938 { \ |
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1939 T* p = (T*)(start_p); \ |
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1940 T* const end = p + (count); \ |
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1941 while (p < end) { \ |
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1942 (assert_fn)(p); \ |
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1943 do_oop; \ |
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1944 ++p; \ |
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1945 } \ |
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1946 } |
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1947 |
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1948 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1949 T, start_p, count, do_oop, \ |
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1950 assert_fn) \ |
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1951 { \ |
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1952 T* const start = (T*)(start_p); \ |
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1953 T* p = start + (count); \ |
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1954 while (start < p) { \ |
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1955 --p; \ |
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1956 (assert_fn)(p); \ |
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1957 do_oop; \ |
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1958 } \ |
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1959 } |
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1960 |
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1961 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1962 T, start_p, count, low, high, \ |
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1963 do_oop, assert_fn) \ |
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1964 { \ |
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1965 T* const l = (T*)(low); \ |
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1966 T* const h = (T*)(high); \ |
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1967 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1968 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1969 "bounded region must be properly aligned"); \ |
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1970 T* p = (T*)(start_p); \ |
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1971 T* end = p + (count); \ |
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1972 if (p < l) p = l; \ |
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1973 if (end > h) end = h; \ |
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1974 while (p < end) { \ |
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1975 (assert_fn)(p); \ |
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1976 do_oop; \ |
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1977 ++p; \ |
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1978 } \ |
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1979 } |
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1980 |
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1981 |
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1982 // The following macros call specialized macros, passing either oop or |
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1983 // narrowOop as the specialization type. These test the UseCompressedOops |
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1984 // flag. |
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1985 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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1986 { \ |
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1987 /* Compute oopmap block range. The common case \ |
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1988 is nonstatic_oop_map_size == 1. */ \ |
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1989 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 1990 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
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1991 if (UseCompressedOops) { \ |
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1992 while (map < end_map) { \ |
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1993 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
938 | 1994 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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1995 do_oop, assert_fn) \ |
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1996 ++map; \ |
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1997 } \ |
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1998 } else { \ |
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1999 while (map < end_map) { \ |
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2000 InstanceKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
938 | 2001 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2002 do_oop, assert_fn) \ |
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2003 ++map; \ |
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2004 } \ |
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2005 } \ |
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2006 } |
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2007 |
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2008 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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2009 { \ |
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2010 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
938 | 2011 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
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2012 if (UseCompressedOops) { \ |
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2013 while (start_map < map) { \ |
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2014 --map; \ |
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2015 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
938 | 2016 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2017 do_oop, assert_fn) \ |
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2018 } \ |
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2019 } else { \ |
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2020 while (start_map < map) { \ |
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2021 --map; \ |
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2022 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
938 | 2023 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2024 do_oop, assert_fn) \ |
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2025 } \ |
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2026 } \ |
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2027 } |
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2028 |
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2029 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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2030 assert_fn) \ |
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2031 { \ |
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2032 /* Compute oopmap block range. The common case is \ |
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2033 nonstatic_oop_map_size == 1, so we accept the \ |
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2034 usually non-existent extra overhead of examining \ |
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2035 all the maps. */ \ |
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2036 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 2037 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
113
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2038 if (UseCompressedOops) { \ |
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2039 while (map < end_map) { \ |
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2040 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
938 | 2041 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2042 low, high, \ |
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2043 do_oop, assert_fn) \ |
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2044 ++map; \ |
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2045 } \ |
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2046 } else { \ |
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2047 while (map < end_map) { \ |
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2048 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
938 | 2049 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2050 low, high, \ |
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2051 do_oop, assert_fn) \ |
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2052 ++map; \ |
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2053 } \ |
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2054 } \ |
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2055 } |
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2056 |
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2057 void InstanceKlass::oop_follow_contents(oop obj) { |
113
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2058 assert(obj != NULL, "can't follow the content of NULL object"); |
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2059 MarkSweep::follow_klass(obj->klass()); |
113
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2060 InstanceKlass_OOP_MAP_ITERATE( \ |
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2061 obj, \ |
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2062 MarkSweep::mark_and_push(p), \ |
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2063 assert_is_in_closed_subset) |
0 | 2064 } |
2065 | |
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2066 #if INCLUDE_ALL_GCS |
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2067 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
0 | 2068 oop obj) { |
113
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2069 assert(obj != NULL, "can't follow the content of NULL object"); |
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2070 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2071 // Only mark the header and let the scan of the meta-data mark |
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2072 // everything else. |
113
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2073 InstanceKlass_OOP_MAP_ITERATE( \ |
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2074 obj, \ |
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2075 PSParallelCompact::mark_and_push(cm, p), \ |
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2076 assert_is_in) |
0 | 2077 } |
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2078 #endif // INCLUDE_ALL_GCS |
0 | 2079 |
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2080 // closure's do_metadata() method dictates whether the given closure should be |
0 | 2081 // applied to the klass ptr in the object header. |
2082 | |
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2083 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2084 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2085 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2086 "Inconsistency in do_metadata"); \ |
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2087 if (closure->do_metadata##nv_suffix()) |
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2088 |
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2089 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
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2090 \ |
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2091 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
113
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2092 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2093 /* header */ \ |
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2094 if_do_metadata_checked(closure, nv_suffix) { \ |
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2095 closure->do_klass##nv_suffix(obj->klass()); \ |
113
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2096 } \ |
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2097 InstanceKlass_OOP_MAP_ITERATE( \ |
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2098 obj, \ |
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2099 SpecializationStats:: \ |
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2100 record_do_oop_call##nv_suffix(SpecializationStats::ik); \ |
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2101 (closure)->do_oop##nv_suffix(p), \ |
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2102 assert_is_in_closed_subset) \ |
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2103 return size_helper(); \ |
0 | 2104 } |
2105 | |
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2106 #if INCLUDE_ALL_GCS |
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2107 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2108 \ |
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2109 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
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2110 OopClosureType* closure) { \ |
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2111 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2112 /* header */ \ |
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2113 if_do_metadata_checked(closure, nv_suffix) { \ |
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2114 closure->do_klass##nv_suffix(obj->klass()); \ |
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2115 } \ |
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2116 /* instance variables */ \ |
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2117 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2118 obj, \ |
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2119 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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2120 (closure)->do_oop##nv_suffix(p), \ |
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2121 assert_is_in_closed_subset) \ |
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2122 return size_helper(); \ |
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2123 } |
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2124 #endif // INCLUDE_ALL_GCS |
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2125 |
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2126 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2127 \ |
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2128 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
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2129 OopClosureType* closure, \ |
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2130 MemRegion mr) { \ |
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2131 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2132 if_do_metadata_checked(closure, nv_suffix) { \ |
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2133 if (mr.contains(obj)) { \ |
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2134 closure->do_klass##nv_suffix(obj->klass()); \ |
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2135 } \ |
113
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2136 } \ |
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2137 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2138 obj, mr.start(), mr.end(), \ |
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2139 (closure)->do_oop##nv_suffix(p), \ |
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2140 assert_is_in_closed_subset) \ |
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2141 return size_helper(); \ |
0 | 2142 } |
2143 | |
2144 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
342
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2145 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
0 | 2146 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
342
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2147 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2148 #if INCLUDE_ALL_GCS |
342
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2149 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2150 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2151 #endif // INCLUDE_ALL_GCS |
0 | 2152 |
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2153 int InstanceKlass::oop_adjust_pointers(oop obj) { |
0 | 2154 int size = size_helper(); |
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2155 InstanceKlass_OOP_MAP_ITERATE( \ |
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2156 obj, \ |
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2157 MarkSweep::adjust_pointer(p), \ |
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2158 assert_is_in) |
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2159 MarkSweep::adjust_klass(obj->klass()); |
0 | 2160 return size; |
2161 } | |
2162 | |
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2163 #if INCLUDE_ALL_GCS |
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2164 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
113
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2165 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2166 obj, \ |
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2167 if (PSScavenge::should_scavenge(p)) { \ |
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2168 pm->claim_or_forward_depth(p); \ |
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2169 }, \ |
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2170 assert_nothing ) |
0 | 2171 } |
2172 | |
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2173 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
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2174 int size = size_helper(); |
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2175 InstanceKlass_OOP_MAP_ITERATE( \ |
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2176 obj, \ |
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2177 PSParallelCompact::adjust_pointer(p), \ |
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2178 assert_is_in) |
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2179 obj->update_header(cm); |
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2180 return size; |
0 | 2181 } |
2182 | |
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2183 #endif // INCLUDE_ALL_GCS |
0 | 2184 |
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2185 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
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2186 assert(is_loader_alive(is_alive), "this klass should be live"); |
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2187 if (is_interface()) { |
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2188 if (ClassUnloading) { |
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2189 Klass* impl = implementor(); |
5998
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2190 if (impl != NULL) { |
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2191 if (!impl->is_loader_alive(is_alive)) { |
5998
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2192 // remove this guy |
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2193 Klass** klass = adr_implementor(); |
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2194 assert(klass != NULL, "null klass"); |
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2195 if (klass != NULL) { |
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2196 *klass = NULL; |
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2197 } |
5998
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2198 } |
0 | 2199 } |
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2200 } |
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2201 } |
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2202 } |
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2203 |
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2204 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
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2205 for (int m = 0; m < methods()->length(); m++) { |
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2206 MethodData* mdo = methods()->at(m)->method_data(); |
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2207 if (mdo != NULL) { |
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2208 for (ProfileData* data = mdo->first_data(); |
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2209 mdo->is_valid(data); |
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2210 data = mdo->next_data(data)) { |
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2211 data->clean_weak_klass_links(is_alive); |
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2212 } |
0 | 2213 } |
2214 } | |
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2215 } |
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2216 |
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2217 |
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2218 static void remove_unshareable_in_class(Klass* k) { |
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2219 // remove klass's unshareable info |
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2220 k->remove_unshareable_info(); |
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2221 } |
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2222 |
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2223 void InstanceKlass::remove_unshareable_info() { |
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2224 Klass::remove_unshareable_info(); |
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2225 // Unlink the class |
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2226 if (is_linked()) { |
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2227 unlink_class(); |
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2228 } |
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2229 init_implementor(); |
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2230 |
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2231 constants()->remove_unshareable_info(); |
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2232 |
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2233 for (int i = 0; i < methods()->length(); i++) { |
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2234 Method* m = methods()->at(i); |
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2235 m->remove_unshareable_info(); |
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2236 } |
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|
2237 |
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2238 // do array classes also. |
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2239 array_klasses_do(remove_unshareable_in_class); |
0 | 2240 } |
2241 | |
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2242 void restore_unshareable_in_class(Klass* k, TRAPS) { |
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2243 k->restore_unshareable_info(CHECK); |
0 | 2244 } |
2245 | |
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2246 void InstanceKlass::restore_unshareable_info(TRAPS) { |
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2247 Klass::restore_unshareable_info(CHECK); |
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2248 instanceKlassHandle ik(THREAD, this); |
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2249 |
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2250 Array<Method*>* methods = ik->methods(); |
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2251 int num_methods = methods->length(); |
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2252 for (int index2 = 0; index2 < num_methods; ++index2) { |
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2253 methodHandle m(THREAD, methods->at(index2)); |
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2254 m()->link_method(m, CHECK); |
6733
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2255 // restore method's vtable by calling a virtual function |
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2256 m->restore_vtable(); |
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2257 } |
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2258 if (JvmtiExport::has_redefined_a_class()) { |
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2259 // Reinitialize vtable because RedefineClasses may have changed some |
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2260 // entries in this vtable for super classes so the CDS vtable might |
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2261 // point to old or obsolete entries. RedefineClasses doesn't fix up |
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2262 // vtables in the shared system dictionary, only the main one. |
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2263 // It also redefines the itable too so fix that too. |
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2264 ResourceMark rm(THREAD); |
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|
2265 ik->vtable()->initialize_vtable(false, CHECK); |
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2266 ik->itable()->initialize_itable(false, CHECK); |
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2267 } |
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|
2268 |
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2269 // restore constant pool resolved references |
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2270 ik->constants()->restore_unshareable_info(CHECK); |
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2271 |
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2272 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
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2273 } |
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2274 |
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2275 static void clear_all_breakpoints(Method* m) { |
0 | 2276 m->clear_all_breakpoints(); |
2277 } | |
2278 | |
10149
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|
2279 |
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|
2280 void InstanceKlass::notify_unload_class(InstanceKlass* ik) { |
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|
2281 // notify the debugger |
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|
2282 if (JvmtiExport::should_post_class_unload()) { |
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10133
diff
changeset
|
2283 JvmtiExport::post_class_unload(ik); |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2284 } |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2285 |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2286 // notify ClassLoadingService of class unload |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2287 ClassLoadingService::notify_class_unloaded(ik); |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2288 } |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2289 |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2290 void InstanceKlass::release_C_heap_structures(InstanceKlass* ik) { |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2291 // Clean up C heap |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2292 ik->release_C_heap_structures(); |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2293 ik->constants()->release_C_heap_structures(); |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2294 } |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2295 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2296 void InstanceKlass::release_C_heap_structures() { |
10149
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2297 |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2298 // Can't release the constant pool here because the constant pool can be |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2299 // deallocated separately from the InstanceKlass for default methods and |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2300 // redefine classes. |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2301 |
0 | 2302 // Deallocate oop map cache |
2303 if (_oop_map_cache != NULL) { | |
2304 delete _oop_map_cache; | |
2305 _oop_map_cache = NULL; | |
2306 } | |
2307 | |
2308 // Deallocate JNI identifiers for jfieldIDs | |
2309 JNIid::deallocate(jni_ids()); | |
2310 set_jni_ids(NULL); | |
2311 | |
2312 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
2313 if (jmeths != (jmethodID*)NULL) { | |
2314 release_set_methods_jmethod_ids(NULL); | |
2315 FreeHeap(jmeths); | |
2316 } | |
2317 | |
10347
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2318 // Deallocate MemberNameTable |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2319 { |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2320 Mutex* lock_or_null = SafepointSynchronize::is_at_safepoint() ? NULL : MemberNameTable_lock; |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2321 MutexLockerEx ml(lock_or_null, Mutex::_no_safepoint_check_flag); |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2322 MemberNameTable* mnt = member_names(); |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2323 if (mnt != NULL) { |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2324 delete mnt; |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2325 set_member_names(NULL); |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2326 } |
10133
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
sspitsyn
parents:
9062
diff
changeset
|
2327 } |
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
sspitsyn
parents:
9062
diff
changeset
|
2328 |
0 | 2329 int* indices = methods_cached_itable_indices_acquire(); |
2330 if (indices != (int*)NULL) { | |
2331 release_set_methods_cached_itable_indices(NULL); | |
2332 FreeHeap(indices); | |
2333 } | |
2334 | |
2335 // release dependencies | |
2336 nmethodBucket* b = _dependencies; | |
2337 _dependencies = NULL; | |
2338 while (b != NULL) { | |
2339 nmethodBucket* next = b->next(); | |
2340 delete b; | |
2341 b = next; | |
2342 } | |
2343 | |
2344 // Deallocate breakpoint records | |
2345 if (breakpoints() != 0x0) { | |
2346 methods_do(clear_all_breakpoints); | |
2347 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
2348 } | |
2349 | |
2350 // deallocate information about previous versions | |
2351 if (_previous_versions != NULL) { | |
2352 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
2353 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
2354 delete pv_node; | |
2355 } | |
2356 delete _previous_versions; | |
2357 _previous_versions = NULL; | |
2358 } | |
2359 | |
2360 // deallocate the cached class file | |
11148
825e6cb66923
8020309: Eliminate InstanceKlass::_cached_class_file_len.
jiangli
parents:
11096
diff
changeset
|
2361 if (_cached_class_file != NULL) { |
825e6cb66923
8020309: Eliminate InstanceKlass::_cached_class_file_len.
jiangli
parents:
11096
diff
changeset
|
2362 os::free(_cached_class_file, mtClass); |
825e6cb66923
8020309: Eliminate InstanceKlass::_cached_class_file_len.
jiangli
parents:
11096
diff
changeset
|
2363 _cached_class_file = NULL; |
0 | 2364 } |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2365 |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2366 // Decrement symbol reference counts associated with the unloaded class. |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2367 if (_name != NULL) _name->decrement_refcount(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2368 // unreference array name derived from this class name (arrays of an unloaded |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2369 // class can't be referenced anymore). |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2370 if (_array_name != NULL) _array_name->decrement_refcount(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2371 if (_source_file_name != NULL) _source_file_name->decrement_refcount(); |
6203
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2372 if (_source_debug_extension != NULL) FREE_C_HEAP_ARRAY(char, _source_debug_extension, mtClass); |
7464
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7180
diff
changeset
|
2373 |
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7180
diff
changeset
|
2374 assert(_total_instanceKlass_count >= 1, "Sanity check"); |
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7180
diff
changeset
|
2375 Atomic::dec(&_total_instanceKlass_count); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2376 } |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2377 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2378 void InstanceKlass::set_source_file_name(Symbol* n) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2379 _source_file_name = n; |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2380 if (_source_file_name != NULL) _source_file_name->increment_refcount(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2381 } |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2382 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2383 void InstanceKlass::set_source_debug_extension(char* array, int length) { |
6203
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2384 if (array == NULL) { |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2385 _source_debug_extension = NULL; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2386 } else { |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2387 // Adding one to the attribute length in order to store a null terminator |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2388 // character could cause an overflow because the attribute length is |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2389 // already coded with an u4 in the classfile, but in practice, it's |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2390 // unlikely to happen. |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2391 assert((length+1) > length, "Overflow checking"); |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2392 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass); |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2393 for (int i = 0; i < length; i++) { |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2394 sde[i] = array[i]; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2395 } |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2396 sde[length] = '\0'; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2397 _source_debug_extension = sde; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2398 } |
0 | 2399 } |
2400 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2401 address InstanceKlass::static_field_addr(int offset) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents:
6733
diff
changeset
|
2402 return (address)(offset + InstanceMirrorKlass::offset_of_static_fields() + (intptr_t)java_mirror()); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2403 } |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2404 |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2405 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2406 const char* InstanceKlass::signature_name() const { |
0 | 2407 const char* src = (const char*) (name()->as_C_string()); |
2408 const int src_length = (int)strlen(src); | |
2409 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
2410 int src_index = 0; | |
2411 int dest_index = 0; | |
2412 dest[dest_index++] = 'L'; | |
2413 while (src_index < src_length) { | |
2414 dest[dest_index++] = src[src_index++]; | |
2415 } | |
2416 dest[dest_index++] = ';'; | |
2417 dest[dest_index] = '\0'; | |
2418 return dest; | |
2419 } | |
2420 | |
2421 // different verisons of is_same_class_package | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2422 bool InstanceKlass::is_same_class_package(Klass* class2) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2423 Klass* class1 = this; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2424 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2425 Symbol* classname1 = class1->name(); |
2426 | |
2427 if (class2->oop_is_objArray()) { | |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents:
6735
diff
changeset
|
2428 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
0 | 2429 } |
2430 oop classloader2; | |
6983 | 2431 if (class2->oop_is_instance()) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2432 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
0 | 2433 } else { |
6983 | 2434 assert(class2->oop_is_typeArray(), "should be type array"); |
0 | 2435 classloader2 = NULL; |
2436 } | |
6983 | 2437 Symbol* classname2 = class2->name(); |
0 | 2438 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2439 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2440 classloader2, classname2); |
2441 } | |
2442 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2443 bool InstanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2444 Klass* class1 = this; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2445 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2446 Symbol* classname1 = class1->name(); |
0 | 2447 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2448 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2449 classloader2, classname2); |
2450 } | |
2451 | |
2452 // return true if two classes are in the same package, classloader | |
2453 // and classname information is enough to determine a class's package | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2454 bool InstanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1, |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2455 oop class_loader2, Symbol* class_name2) { |
0 | 2456 if (class_loader1 != class_loader2) { |
2457 return false; | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2458 } else if (class_name1 == class_name2) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2459 return true; // skip painful bytewise comparison |
0 | 2460 } else { |
2461 ResourceMark rm; | |
2462 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2463 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
0 | 2464 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
2465 // Otherwise, we just compare jbyte values between the strings. | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2466 const jbyte *name1 = class_name1->base(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2467 const jbyte *name2 = class_name2->base(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2468 |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2469 const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/'); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2470 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
0 | 2471 |
2472 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
2473 // One of the two doesn't have a package. Only return true | |
2474 // if the other one also doesn't have a package. | |
2475 return last_slash1 == last_slash2; | |
2476 } else { | |
2477 // Skip over '['s | |
2478 if (*name1 == '[') { | |
2479 do { | |
2480 name1++; | |
2481 } while (*name1 == '['); | |
2482 if (*name1 != 'L') { | |
2483 // Something is terribly wrong. Shouldn't be here. | |
2484 return false; | |
2485 } | |
2486 } | |
2487 if (*name2 == '[') { | |
2488 do { | |
2489 name2++; | |
2490 } while (*name2 == '['); | |
2491 if (*name2 != 'L') { | |
2492 // Something is terribly wrong. Shouldn't be here. | |
2493 return false; | |
2494 } | |
2495 } | |
2496 | |
2497 // Check that package part is identical | |
2498 int length1 = last_slash1 - name1; | |
2499 int length2 = last_slash2 - name2; | |
2500 | |
2501 return UTF8::equal(name1, length1, name2, length2); | |
2502 } | |
2503 } | |
2504 } | |
2505 | |
652
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2506 // Returns true iff super_method can be overridden by a method in targetclassname |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
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|
2507 // See JSL 3rd edition 8.4.6.1 |
4aaa9f5e02a8
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|
2508 // Assumes name-signature match |
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2509 // "this" is InstanceKlass of super_method which must exist |
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2510 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
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2511 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
652
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2512 // Private methods can not be overridden |
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|
2513 if (super_method->is_private()) { |
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|
2514 return false; |
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diff
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|
2515 } |
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diff
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|
2516 // If super method is accessible, then override |
4aaa9f5e02a8
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|
2517 if ((super_method->is_protected()) || |
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|
2518 (super_method->is_public())) { |
4aaa9f5e02a8
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|
2519 return true; |
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|
2520 } |
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|
2521 // Package-private methods are not inherited outside of package |
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|
2522 assert(super_method->is_package_private(), "must be package private"); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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|
2523 return(is_same_class_package(targetclassloader(), targetclassname)); |
652
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|
2524 } |
0 | 2525 |
665
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|
2526 /* defined for now in jvm.cpp, for historical reasons *-- |
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2527 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle self, |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2528 Symbol*& simple_name_result, TRAPS) { |
665
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|
2529 ... |
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|
2530 } |
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|
2531 */ |
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|
2532 |
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|
2533 // tell if two classes have the same enclosing class (at package level) |
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2534 bool InstanceKlass::is_same_package_member_impl(instanceKlassHandle class1, |
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2535 Klass* class2_oop, TRAPS) { |
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2536 if (class2_oop == class1()) return true; |
6983 | 2537 if (!class2_oop->oop_is_instance()) return false; |
665
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2538 instanceKlassHandle class2(THREAD, class2_oop); |
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|
2539 |
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2540 // must be in same package before we try anything else |
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|
2541 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
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|
2542 return false; |
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|
2543 |
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|
2544 // As long as there is an outer1.getEnclosingClass, |
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|
2545 // shift the search outward. |
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|
2546 instanceKlassHandle outer1 = class1; |
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|
2547 for (;;) { |
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|
2548 // As we walk along, look for equalities between outer1 and class2. |
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|
2549 // Eventually, the walks will terminate as outer1 stops |
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|
2550 // at the top-level class around the original class. |
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|
2551 bool ignore_inner_is_member; |
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2552 Klass* next = outer1->compute_enclosing_class(&ignore_inner_is_member, |
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|
2553 CHECK_false); |
665
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|
2554 if (next == NULL) break; |
c89f86385056
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|
2555 if (next == class2()) return true; |
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|
2556 outer1 = instanceKlassHandle(THREAD, next); |
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|
2557 } |
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|
2558 |
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|
2559 // Now do the same for class2. |
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|
2560 instanceKlassHandle outer2 = class2; |
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|
2561 for (;;) { |
1126
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|
2562 bool ignore_inner_is_member; |
6725
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2563 Klass* next = outer2->compute_enclosing_class(&ignore_inner_is_member, |
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diff
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|
2564 CHECK_false); |
665
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|
2565 if (next == NULL) break; |
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|
2566 // Might as well check the new outer against all available values. |
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jrose
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|
2567 if (next == class1()) return true; |
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605
diff
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|
2568 if (next == outer1()) return true; |
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jrose
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|
2569 outer2 = instanceKlassHandle(THREAD, next); |
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jrose
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|
2570 } |
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|
2571 |
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605
diff
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|
2572 // If by this point we have not found an equality between the |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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|
2573 // two classes, we know they are in separate package members. |
c89f86385056
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jrose
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605
diff
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|
2574 return false; |
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jrose
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605
diff
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|
2575 } |
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jrose
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605
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|
2576 |
0 | 2577 |
6725
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|
2578 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
0 | 2579 jint access = access_flags().as_int(); |
2580 | |
2581 // But check if it happens to be member class. | |
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|
2582 instanceKlassHandle ik(THREAD, this); |
5967
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
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4739
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|
2583 InnerClassesIterator iter(ik); |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2584 for (; !iter.done(); iter.next()) { |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
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|
2585 int ioff = iter.inner_class_info_index(); |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2586 // Inner class attribute can be zero, skip it. |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2587 // Strange but true: JVM spec. allows null inner class refs. |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2588 if (ioff == 0) continue; |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2589 |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2590 // only look at classes that are already loaded |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2591 // since we are looking for the flags for our self. |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
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|
2592 Symbol* inner_name = ik->constants()->klass_name_at(ioff); |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
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4739
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|
2593 if ((ik->name() == inner_name)) { |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
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4739
diff
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|
2594 // This is really a member class. |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2595 access = iter.inner_access_flags(); |
f7c4174b33ba
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jiangli
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4739
diff
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|
2596 break; |
0 | 2597 } |
2598 } | |
2599 // Remember to strip ACC_SUPER bit | |
2600 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
2601 } | |
2602 | |
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|
2603 jint InstanceKlass::jvmti_class_status() const { |
0 | 2604 jint result = 0; |
2605 | |
2606 if (is_linked()) { | |
2607 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
2608 } | |
2609 | |
2610 if (is_initialized()) { | |
2611 assert(is_linked(), "Class status is not consistent"); | |
2612 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
2613 } | |
2614 if (is_in_error_state()) { | |
2615 result |= JVMTI_CLASS_STATUS_ERROR; | |
2616 } | |
2617 return result; | |
2618 } | |
2619 | |
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2620 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
0 | 2621 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
2622 int method_table_offset_in_words = ioe->offset()/wordSize; | |
2623 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
2624 / itableOffsetEntry::size(); | |
2625 | |
2626 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
605 | 2627 // If the interface isn't implemented by the receiver class, |
0 | 2628 // the VM should throw IncompatibleClassChangeError. |
2629 if (cnt >= nof_interfaces) { | |
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2630 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
0 | 2631 } |
2632 | |
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|
2633 Klass* ik = ioe->interface_klass(); |
0 | 2634 if (ik == holder) break; |
2635 } | |
2636 | |
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2637 itableMethodEntry* ime = ioe->first_method_entry(this); |
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2638 Method* m = ime[index].method(); |
0 | 2639 if (m == NULL) { |
6725
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|
2640 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
0 | 2641 } |
2642 return m; | |
2643 } | |
2644 | |
2645 // On-stack replacement stuff | |
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2646 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
0 | 2647 // only one compilation can be active |
2648 NEEDS_CLEANUP | |
2649 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
2650 OsrList_lock->lock_without_safepoint_check(); | |
2651 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
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|
2652 n->set_osr_link(osr_nmethods_head()); |
0 | 2653 set_osr_nmethods_head(n); |
1783 | 2654 // Raise the highest osr level if necessary |
2655 if (TieredCompilation) { | |
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|
2656 Method* m = n->method(); |
1783 | 2657 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
2658 } | |
0 | 2659 // Remember to unlock again |
2660 OsrList_lock->unlock(); | |
1783 | 2661 |
2662 // Get rid of the osr methods for the same bci that have lower levels. | |
2663 if (TieredCompilation) { | |
2664 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
2665 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
2666 if (inv != NULL && inv->is_in_use()) { | |
2667 inv->make_not_entrant(); | |
2668 } | |
2669 } | |
2670 } | |
0 | 2671 } |
2672 | |
2673 | |
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|
2674 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
0 | 2675 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2676 OsrList_lock->lock_without_safepoint_check(); | |
2677 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
2678 nmethod* last = NULL; | |
2679 nmethod* cur = osr_nmethods_head(); | |
1783 | 2680 int max_level = CompLevel_none; // Find the max comp level excluding n |
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|
2681 Method* m = n->method(); |
0 | 2682 // Search for match |
2683 while(cur != NULL && cur != n) { | |
1783 | 2684 if (TieredCompilation) { |
2685 // Find max level before n | |
2686 max_level = MAX2(max_level, cur->comp_level()); | |
2687 } | |
0 | 2688 last = cur; |
989
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|
2689 cur = cur->osr_link(); |
0 | 2690 } |
1783 | 2691 nmethod* next = NULL; |
0 | 2692 if (cur == n) { |
1783 | 2693 next = cur->osr_link(); |
0 | 2694 if (last == NULL) { |
2695 // Remove first element | |
1783 | 2696 set_osr_nmethods_head(next); |
0 | 2697 } else { |
1783 | 2698 last->set_osr_link(next); |
0 | 2699 } |
2700 } | |
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2701 n->set_osr_link(NULL); |
1783 | 2702 if (TieredCompilation) { |
2703 cur = next; | |
2704 while (cur != NULL) { | |
2705 // Find max level after n | |
2706 max_level = MAX2(max_level, cur->comp_level()); | |
2707 cur = cur->osr_link(); | |
2708 } | |
2709 m->set_highest_osr_comp_level(max_level); | |
2710 } | |
0 | 2711 // Remember to unlock again |
2712 OsrList_lock->unlock(); | |
2713 } | |
2714 | |
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2715 nmethod* InstanceKlass::lookup_osr_nmethod(const Method* m, int bci, int comp_level, bool match_level) const { |
0 | 2716 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2717 OsrList_lock->lock_without_safepoint_check(); | |
2718 nmethod* osr = osr_nmethods_head(); | |
1783 | 2719 nmethod* best = NULL; |
0 | 2720 while (osr != NULL) { |
2721 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
1783 | 2722 // There can be a time when a c1 osr method exists but we are waiting |
2723 // for a c2 version. When c2 completes its osr nmethod we will trash | |
2724 // the c1 version and only be able to find the c2 version. However | |
2725 // while we overflow in the c1 code at back branches we don't want to | |
2726 // try and switch to the same code as we are already running | |
2727 | |
0 | 2728 if (osr->method() == m && |
2729 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
1783 | 2730 if (match_level) { |
2731 if (osr->comp_level() == comp_level) { | |
2732 // Found a match - return it. | |
2733 OsrList_lock->unlock(); | |
2734 return osr; | |
2735 } | |
2736 } else { | |
2737 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
2738 if (osr->comp_level() == CompLevel_highest_tier) { | |
2739 // Found the best possible - return it. | |
2740 OsrList_lock->unlock(); | |
2741 return osr; | |
2742 } | |
2743 best = osr; | |
2744 } | |
2745 } | |
0 | 2746 } |
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2747 osr = osr->osr_link(); |
0 | 2748 } |
2749 OsrList_lock->unlock(); | |
1783 | 2750 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
2751 return best; | |
2752 } | |
0 | 2753 return NULL; |
2754 } | |
2755 | |
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2756 void InstanceKlass::add_member_name(int index, Handle mem_name) { |
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2757 jweak mem_name_wref = JNIHandles::make_weak_global(mem_name); |
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2758 MutexLocker ml(MemberNameTable_lock); |
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2759 assert(0 <= index && index < idnum_allocated_count(), "index is out of bounds"); |
10133
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2760 DEBUG_ONLY(No_Safepoint_Verifier nsv); |
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2761 |
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2762 if (_member_names == NULL) { |
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2763 _member_names = new (ResourceObj::C_HEAP, mtClass) MemberNameTable(idnum_allocated_count()); |
10133
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2764 } |
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2765 _member_names->add_member_name(index, mem_name_wref); |
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2766 } |
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2767 |
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2768 oop InstanceKlass::get_member_name(int index) { |
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2769 MutexLocker ml(MemberNameTable_lock); |
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2770 assert(0 <= index && index < idnum_allocated_count(), "index is out of bounds"); |
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2771 DEBUG_ONLY(No_Safepoint_Verifier nsv); |
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2772 |
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2773 if (_member_names == NULL) { |
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2774 return NULL; |
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2775 } |
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2776 oop mem_name =_member_names->get_member_name(index); |
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2777 return mem_name; |
10133
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2778 } |
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2779 |
0 | 2780 // ----------------------------------------------------------------------------------------------------- |
6725
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2781 // Printing |
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2782 |
0 | 2783 #ifndef PRODUCT |
2784 | |
665
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2785 #define BULLET " - " |
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2786 |
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2787 static const char* state_names[] = { |
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2788 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
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2789 }; |
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2790 |
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2791 void InstanceKlass::print_on(outputStream* st) const { |
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2792 assert(is_klass(), "must be klass"); |
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2793 Klass::print_on(st); |
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2794 |
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2795 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
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2796 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2797 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
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2798 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
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2799 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2800 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
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2801 st->print(BULLET"sub: "); |
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2802 Klass* sub = subklass(); |
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2803 int n; |
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2804 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
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2805 if (n < MaxSubklassPrintSize) { |
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2806 sub->print_value_on(st); |
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2807 st->print(" "); |
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2808 } |
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2809 } |
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2810 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
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2811 st->cr(); |
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2812 |
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2813 if (is_interface()) { |
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2814 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
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2815 if (nof_implementors() == 1) { |
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2816 st->print_cr(BULLET"implementor: "); |
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2817 st->print(" "); |
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2818 implementor()->print_value_on(st); |
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2819 st->cr(); |
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2820 } |
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2821 } |
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2822 |
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2823 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
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2824 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
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2825 if (Verbose) { |
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2826 Array<Method*>* method_array = methods(); |
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2827 for(int i = 0; i < method_array->length(); i++) { |
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2828 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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2829 } |
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2830 } |
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2831 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
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2832 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
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2833 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
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2834 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
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2835 if (class_loader_data() != NULL) { |
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2836 st->print(BULLET"class loader data: "); |
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2837 class_loader_data()->print_value_on(st); |
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2838 st->cr(); |
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|
2839 } |
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2840 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
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2841 if (source_file_name() != NULL) { |
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2842 st->print(BULLET"source file: "); |
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2843 source_file_name()->print_value_on(st); |
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2844 st->cr(); |
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|
2845 } |
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2846 if (source_debug_extension() != NULL) { |
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2847 st->print(BULLET"source debug extension: "); |
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2848 st->print("%s", source_debug_extension()); |
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2849 st->cr(); |
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2850 } |
8031 | 2851 st->print(BULLET"class annotations: "); class_annotations()->print_value_on(st); st->cr(); |
2852 st->print(BULLET"class type annotations: "); class_type_annotations()->print_value_on(st); st->cr(); | |
2853 st->print(BULLET"field annotations: "); fields_annotations()->print_value_on(st); st->cr(); | |
2854 st->print(BULLET"field type annotations: "); fields_type_annotations()->print_value_on(st); st->cr(); | |
6725
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2855 { |
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2856 ResourceMark rm; |
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2857 // PreviousVersionInfo objects returned via PreviousVersionWalker |
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2858 // contain a GrowableArray of handles. We have to clean up the |
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2859 // GrowableArray _after_ the PreviousVersionWalker destructor |
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2860 // has destroyed the handles. |
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2861 { |
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|
2862 bool have_pv = false; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2863 PreviousVersionWalker pvw((InstanceKlass*)this); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2864 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2865 pv_info != NULL; pv_info = pvw.next_previous_version()) { |
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6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2866 if (!have_pv) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2867 st->print(BULLET"previous version: "); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2868 have_pv = true; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2869 pv_info->prev_constant_pool_handle()()->print_value_on(st); |
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6964458: Reimplement class meta-data storage to use native memory
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|
2870 } |
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6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2871 if (have_pv) st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2872 } // pvw is cleaned up |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2873 } // rm is cleaned up |
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6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2874 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2875 if (generic_signature() != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2876 st->print(BULLET"generic signature: "); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2877 generic_signature()->print_value_on(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2878 st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
|
2879 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2880 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2881 st->print(BULLET"java mirror: "); java_mirror()->print_value_on(st); st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2882 st->print(BULLET"vtable length %d (start addr: " INTPTR_FORMAT ")", vtable_length(), start_of_vtable()); st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2883 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", itable_length(), start_of_itable()); st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2884 st->print_cr(BULLET"---- static fields (%d words):", static_field_size()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2885 FieldPrinter print_static_field(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2886 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2887 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2888 FieldPrinter print_nonstatic_field(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2889 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2890 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2891 st->print(BULLET"non-static oop maps: "); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2892 OopMapBlock* map = start_of_nonstatic_oop_maps(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2893 OopMapBlock* end_map = map + nonstatic_oop_map_count(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2894 while (map < end_map) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2895 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2896 map++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2897 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2898 st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2899 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
|
2900 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2901 #endif //PRODUCT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2902 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2903 void InstanceKlass::print_value_on(outputStream* st) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2904 assert(is_klass(), "must be klass"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2905 name()->print_value_on(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2906 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2907 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2908 #ifndef PRODUCT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2909 |
0 | 2910 void FieldPrinter::do_field(fieldDescriptor* fd) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2911 _st->print(BULLET); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2912 if (_obj == NULL) { |
0 | 2913 fd->print_on(_st); |
2914 _st->cr(); | |
2915 } else { | |
2916 fd->print_on_for(_st, _obj); | |
2917 _st->cr(); | |
2918 } | |
2919 } | |
2920 | |
2921 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2922 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
0 | 2923 Klass::oop_print_on(obj, st); |
2924 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2925 if (this == SystemDictionary::String_klass()) { |
0 | 2926 typeArrayOop value = java_lang_String::value(obj); |
2927 juint offset = java_lang_String::offset(obj); | |
2928 juint length = java_lang_String::length(obj); | |
2929 if (value != NULL && | |
2930 value->is_typeArray() && | |
2931 offset <= (juint) value->length() && | |
2932 offset + length <= (juint) value->length()) { | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2933 st->print(BULLET"string: "); |
0 | 2934 Handle h_obj(obj); |
2935 java_lang_String::print(h_obj, st); | |
2936 st->cr(); | |
2937 if (!WizardMode) return; // that is enough | |
2938 } | |
2939 } | |
2940 | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2941 st->print_cr(BULLET"---- fields (total size %d words):", oop_size(obj)); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2942 FieldPrinter print_field(st, obj); |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2943 do_nonstatic_fields(&print_field); |
0 | 2944 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2945 if (this == SystemDictionary::Class_klass()) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2946 st->print(BULLET"signature: "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2947 java_lang_Class::print_signature(obj, st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2948 st->cr(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2949 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2950 st->print(BULLET"fake entry for mirror: "); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2951 mirrored_klass->print_value_on_maybe_null(st); |
0 | 2952 st->cr(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2953 Klass* array_klass = java_lang_Class::array_klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2954 st->print(BULLET"fake entry for array: "); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2955 array_klass->print_value_on_maybe_null(st); |
0 | 2956 st->cr(); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2957 st->print_cr(BULLET"fake entry for oop_size: %d", java_lang_Class::oop_size(obj)); |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2958 st->print_cr(BULLET"fake entry for static_oop_field_count: %d", java_lang_Class::static_oop_field_count(obj)); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2959 Klass* real_klass = java_lang_Class::as_Klass(obj); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2960 if (real_klass != NULL && real_klass->oop_is_instance()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2961 InstanceKlass::cast(real_klass)->do_local_static_fields(&print_field); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2962 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2963 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2964 st->print(BULLET"signature: "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2965 java_lang_invoke_MethodType::print_signature(obj, st); |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2966 st->cr(); |
0 | 2967 } |
2968 } | |
2969 | |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2970 #endif //PRODUCT |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2971 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2972 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
0 | 2973 st->print("a "); |
2974 name()->print_value_on(st); | |
2975 obj->print_address_on(st); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2976 if (this == SystemDictionary::String_klass() |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2977 && java_lang_String::value(obj) != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2978 ResourceMark rm; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2979 int len = java_lang_String::length(obj); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2980 int plen = (len < 24 ? len : 12); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2981 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2982 st->print(" = \"%s\"", str); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2983 if (len > plen) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2984 st->print("...[%d]", len); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2985 } else if (this == SystemDictionary::Class_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2986 Klass* k = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2987 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2988 if (k != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2989 k->print_value_on(st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2990 } else { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2991 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2992 st->print("%s", tname ? tname : "type?"); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2993 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2994 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2995 st->print(" = "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2996 java_lang_invoke_MethodType::print_signature(obj, st); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2997 } else if (java_lang_boxing_object::is_instance(obj)) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2998 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2999 java_lang_boxing_object::print(obj, st); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3000 } else if (this == SystemDictionary::LambdaForm_klass()) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3001 oop vmentry = java_lang_invoke_LambdaForm::vmentry(obj); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3002 if (vmentry != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3003 st->print(" => "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3004 vmentry->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3005 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3006 } else if (this == SystemDictionary::MemberName_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3007 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(obj); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3008 if (vmtarget != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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3009 st->print(" = "); |
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3010 vmtarget->print_value_on(st); |
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3011 } else { |
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3012 java_lang_invoke_MemberName::clazz(obj)->print_value_on(st); |
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3013 st->print("."); |
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3014 java_lang_invoke_MemberName::name(obj)->print_value_on(st); |
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3015 } |
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3016 } |
0 | 3017 } |
3018 | |
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3019 const char* InstanceKlass::internal_name() const { |
0 | 3020 return external_name(); |
3021 } | |
3022 | |
7956 | 3023 #if INCLUDE_SERVICES |
3024 // Size Statistics | |
3025 void InstanceKlass::collect_statistics(KlassSizeStats *sz) const { | |
3026 Klass::collect_statistics(sz); | |
3027 | |
3028 sz->_inst_size = HeapWordSize * size_helper(); | |
3029 sz->_vtab_bytes = HeapWordSize * align_object_offset(vtable_length()); | |
3030 sz->_itab_bytes = HeapWordSize * align_object_offset(itable_length()); | |
3031 sz->_nonstatic_oopmap_bytes = HeapWordSize * | |
3032 ((is_interface() || is_anonymous()) ? | |
3033 align_object_offset(nonstatic_oop_map_size()) : | |
3034 nonstatic_oop_map_size()); | |
3035 | |
3036 int n = 0; | |
3037 n += (sz->_methods_array_bytes = sz->count_array(methods())); | |
3038 n += (sz->_method_ordering_bytes = sz->count_array(method_ordering())); | |
3039 n += (sz->_local_interfaces_bytes = sz->count_array(local_interfaces())); | |
3040 n += (sz->_transitive_interfaces_bytes = sz->count_array(transitive_interfaces())); | |
3041 n += (sz->_fields_bytes = sz->count_array(fields())); | |
3042 n += (sz->_inner_classes_bytes = sz->count_array(inner_classes())); | |
3043 sz->_ro_bytes += n; | |
3044 | |
3045 const ConstantPool* cp = constants(); | |
3046 if (cp) { | |
3047 cp->collect_statistics(sz); | |
3048 } | |
3049 | |
3050 const Annotations* anno = annotations(); | |
3051 if (anno) { | |
3052 anno->collect_statistics(sz); | |
3053 } | |
3054 | |
3055 const Array<Method*>* methods_array = methods(); | |
3056 if (methods()) { | |
3057 for (int i = 0; i < methods_array->length(); i++) { | |
3058 Method* method = methods_array->at(i); | |
3059 if (method) { | |
3060 sz->_method_count ++; | |
3061 method->collect_statistics(sz); | |
3062 } | |
3063 } | |
3064 } | |
3065 } | |
3066 #endif // INCLUDE_SERVICES | |
3067 | |
0 | 3068 // Verification |
3069 | |
3070 class VerifyFieldClosure: public OopClosure { | |
113
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3071 protected: |
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3072 template <class T> void do_oop_work(T* p) { |
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3073 oop obj = oopDesc::load_decode_heap_oop(p); |
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3074 if (!obj->is_oop_or_null()) { |
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3075 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
0 | 3076 Universe::print(); |
3077 guarantee(false, "boom"); | |
3078 } | |
3079 } | |
113
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3080 public: |
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3081 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
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3082 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
0 | 3083 }; |
3084 | |
11034 | 3085 void InstanceKlass::verify_on(outputStream* st, bool check_dictionary) { |
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3086 #ifndef PRODUCT |
11034 | 3087 // Avoid redundant verifies, this really should be in product. |
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3088 if (_verify_count == Universe::verify_count()) return; |
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3089 _verify_count = Universe::verify_count(); |
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3090 #endif |
11034 | 3091 |
3092 // Verify Klass | |
3093 Klass::verify_on(st, check_dictionary); | |
3094 | |
3095 // Verify that klass is present in SystemDictionary if not already | |
3096 // verifying the SystemDictionary. | |
3097 if (is_loaded() && !is_anonymous() && check_dictionary) { | |
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3098 Symbol* h_name = name(); |
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3099 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
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3100 } |
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3101 |
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3102 // Verify vtables |
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3103 if (is_linked()) { |
11034 | 3104 ResourceMark rm; |
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3105 // $$$ This used to be done only for m/s collections. Doing it |
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3106 // always seemed a valid generalization. (DLD -- 6/00) |
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3107 vtable()->verify(st); |
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3108 } |
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3109 |
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3110 // Verify first subklass |
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3111 if (subklass_oop() != NULL) { |
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3112 guarantee(subklass_oop()->is_klass(), "should be klass"); |
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3113 } |
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3114 |
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3115 // Verify siblings |
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3116 Klass* super = this->super(); |
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3117 Klass* sib = next_sibling(); |
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3118 if (sib != NULL) { |
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3119 if (sib == this) { |
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3120 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
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3121 } |
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3122 |
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3123 guarantee(sib->is_klass(), "should be klass"); |
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3124 guarantee(sib->super() == super, "siblings should have same superklass"); |
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3125 } |
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3126 |
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3127 // Verify implementor fields |
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3128 Klass* im = implementor(); |
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3129 if (im != NULL) { |
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3130 guarantee(is_interface(), "only interfaces should have implementor set"); |
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3131 guarantee(im->is_klass(), "should be klass"); |
6983 | 3132 guarantee(!im->is_interface() || im == this, |
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3133 "implementors cannot be interfaces"); |
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3134 } |
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3135 |
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3136 // Verify local interfaces |
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3137 if (local_interfaces()) { |
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3138 Array<Klass*>* local_interfaces = this->local_interfaces(); |
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3139 for (int j = 0; j < local_interfaces->length(); j++) { |
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3140 Klass* e = local_interfaces->at(j); |
6983 | 3141 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
6725
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3142 } |
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3143 } |
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3144 |
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3145 // Verify transitive interfaces |
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3146 if (transitive_interfaces() != NULL) { |
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3147 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
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3148 for (int j = 0; j < transitive_interfaces->length(); j++) { |
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3149 Klass* e = transitive_interfaces->at(j); |
6983 | 3150 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
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3151 } |
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3152 } |
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3153 |
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3154 // Verify methods |
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3155 if (methods() != NULL) { |
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3156 Array<Method*>* methods = this->methods(); |
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3157 for (int j = 0; j < methods->length(); j++) { |
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3158 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
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3159 } |
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3160 for (int j = 0; j < methods->length() - 1; j++) { |
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3161 Method* m1 = methods->at(j); |
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3162 Method* m2 = methods->at(j + 1); |
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3163 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
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3164 } |
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3165 } |
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3166 |
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3167 // Verify method ordering |
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3168 if (method_ordering() != NULL) { |
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3169 Array<int>* method_ordering = this->method_ordering(); |
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3170 int length = method_ordering->length(); |
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3171 if (JvmtiExport::can_maintain_original_method_order() || |
9057
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3172 ((UseSharedSpaces || DumpSharedSpaces) && length != 0)) { |
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3173 guarantee(length == methods()->length(), "invalid method ordering length"); |
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3174 jlong sum = 0; |
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3175 for (int j = 0; j < length; j++) { |
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3176 int original_index = method_ordering->at(j); |
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3177 guarantee(original_index >= 0, "invalid method ordering index"); |
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3178 guarantee(original_index < length, "invalid method ordering index"); |
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3179 sum += original_index; |
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3180 } |
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3181 // Verify sum of indices 0,1,...,length-1 |
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3182 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
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3183 } else { |
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3184 guarantee(length == 0, "invalid method ordering length"); |
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3185 } |
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3186 } |
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3187 |
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3188 // Verify JNI static field identifiers |
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3189 if (jni_ids() != NULL) { |
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3190 jni_ids()->verify(this); |
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3191 } |
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3192 |
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3193 // Verify other fields |
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3194 if (array_klasses() != NULL) { |
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3195 guarantee(array_klasses()->is_klass(), "should be klass"); |
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3196 } |
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3197 if (constants() != NULL) { |
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3198 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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3199 } |
8693
872b3feace55
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3200 const Klass* host = host_klass(); |
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3201 if (host != NULL) { |
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3202 guarantee(host->is_klass(), "should be klass"); |
6725
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3203 } |
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3204 } |
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3205 |
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3206 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
0 | 3207 Klass::oop_verify_on(obj, st); |
3208 VerifyFieldClosure blk; | |
6725
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3209 obj->oop_iterate_no_header(&blk); |
0 | 3210 } |
3211 | |
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3212 |
113
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3213 // JNIid class for jfieldIDs only |
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3214 // Note to reviewers: |
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3215 // These JNI functions are just moved over to column 1 and not changed |
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3216 // in the compressed oops workspace. |
6725
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3217 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
113
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3218 _holder = holder; |
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3219 _offset = offset; |
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3220 _next = next; |
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3221 debug_only(_is_static_field_id = false;) |
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3222 } |
0 | 3223 |
3224 | |
113
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3225 JNIid* JNIid::find(int offset) { |
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3226 JNIid* current = this; |
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3227 while (current != NULL) { |
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3228 if (current->offset() == offset) return current; |
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3229 current = current->next(); |
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3230 } |
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|
3231 return NULL; |
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3232 } |
0 | 3233 |
3234 void JNIid::deallocate(JNIid* current) { | |
113
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3235 while (current != NULL) { |
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3236 JNIid* next = current->next(); |
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3237 delete current; |
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3238 current = next; |
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3239 } |
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3240 } |
0 | 3241 |
3242 | |
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3243 void JNIid::verify(Klass* holder) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
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3244 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
113
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3245 int end_field_offset; |
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3246 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
0 | 3247 |
113
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3248 JNIid* current = this; |
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3249 while (current != NULL) { |
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3250 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
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3251 #ifdef ASSERT |
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3252 int o = current->offset(); |
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3253 if (current->is_static_field_id()) { |
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3254 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
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3255 } |
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|
3256 #endif |
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|
3257 current = current->next(); |
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3258 } |
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3259 } |
0 | 3260 |
3261 | |
3262 #ifdef ASSERT | |
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3263 void InstanceKlass::set_init_state(ClassState state) { |
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3264 bool good_state = is_shared() ? (_init_state <= state) |
113
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3265 : (_init_state < state); |
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3266 assert(good_state || state == allocated, "illegal state transition"); |
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
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|
3267 _init_state = (u1)state; |
113
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3268 } |
0 | 3269 #endif |
3270 | |
3271 | |
3272 // RedefineClasses() support for previous versions: | |
3273 | |
6725
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3274 // Purge previous versions |
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3275 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
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3276 if (ik->previous_versions() != NULL) { |
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3277 // This klass has previous versions so see what we can cleanup |
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3278 // while it is safe to do so. |
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3279 |
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3280 int deleted_count = 0; // leave debugging breadcrumbs |
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3281 int live_count = 0; |
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3282 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
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3283 ClassLoaderData::the_null_class_loader_data() : |
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3284 ik->class_loader_data(); |
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|
3285 |
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3286 // RC_TRACE macro has an embedded ResourceMark |
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3287 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
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3288 ik->external_name(), ik->previous_versions()->length())); |
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3289 |
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3290 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
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3291 // check the previous versions array |
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3292 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
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3293 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
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3294 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
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3295 |
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3296 ConstantPool* pvcp = cp_ref; |
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3297 if (!pvcp->on_stack()) { |
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3298 // If the constant pool isn't on stack, none of the methods |
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3299 // are executing. Delete all the methods, the constant pool and |
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3300 // and this previous version node. |
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3301 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3302 if (method_refs != NULL) { |
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3303 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3304 Method* method = method_refs->at(j); |
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3305 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3306 method_refs->remove_at(j); |
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3307 // method will be freed with associated class. |
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|
3308 } |
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|
3309 } |
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3310 // Remove the constant pool |
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3311 delete pv_node; |
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3312 // Since we are traversing the array backwards, we don't have to |
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3313 // do anything special with the index. |
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3314 ik->previous_versions()->remove_at(i); |
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3315 deleted_count++; |
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3316 continue; |
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3317 } else { |
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3318 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
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3319 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
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3320 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
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3321 live_count++; |
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|
3322 } |
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|
3323 |
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3324 // At least one method is live in this previous version, clean out |
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3325 // the others or mark them as obsolete. |
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3326 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3327 if (method_refs != NULL) { |
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3328 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
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3329 method_refs->length())); |
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3330 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3331 Method* method = method_refs->at(j); |
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3332 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3333 |
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3334 // Remove the emcp method if it's not executing |
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3335 // If it's been made obsolete by a redefinition of a non-emcp |
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3336 // method, mark it as obsolete but leave it to clean up later. |
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3337 if (!method->on_stack()) { |
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3338 method_refs->remove_at(j); |
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3339 } else if (emcp_method_count == 0) { |
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3340 method->set_is_obsolete(); |
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|
3341 } else { |
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3342 // RC_TRACE macro has an embedded ResourceMark |
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|
3343 RC_TRACE(0x00000200, |
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3344 ("purge: %s(%s): prev method @%d in version @%d is alive", |
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3345 method->name()->as_C_string(), |
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3346 method->signature()->as_C_string(), j, i)); |
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|
3347 } |
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|
3348 } |
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|
3349 } |
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|
3350 } |
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|
3351 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
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3352 RC_TRACE(0x00000200, |
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3353 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
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3354 deleted_count)); |
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|
3355 } |
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|
3356 } |
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3357 |
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3358 // External interface for use during class unloading. |
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3359 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
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3360 // Call with >0 emcp methods since they are not currently being redefined. |
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3361 purge_previous_versions_internal(ik, 1); |
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|
3362 } |
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3363 |
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3364 |
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3365 // Potentially add an information node that contains pointers to the |
0 | 3366 // interesting parts of the previous version of the_class. |
6725
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3367 // This is also where we clean out any unused references. |
977
74a5db69c1fe
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diff
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|
3368 // Note that while we delete nodes from the _previous_versions |
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diff
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|
3369 // array, we never delete the array itself until the klass is |
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diff
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|
3370 // unloaded. The has_been_redefined() query depends on that fact. |
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|
3371 // |
6725
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3372 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
113
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|
3373 BitMap* emcp_methods, int emcp_method_count) { |
0 | 3374 assert(Thread::current()->is_VM_thread(), |
113
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|
3375 "only VMThread can add previous versions"); |
0 | 3376 |
3377 if (_previous_versions == NULL) { | |
3378 // This is the first previous version so make some space. | |
3379 // Start with 2 elements under the assumption that the class | |
3380 // won't be redefined much. | |
6197 | 3381 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
0 | 3382 GrowableArray<PreviousVersionNode *>(2, true); |
3383 } | |
3384 | |
6725
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3385 ConstantPool* cp_ref = ikh->constants(); |
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3386 |
0 | 3387 // RC_TRACE macro has an embedded ResourceMark |
6725
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3388 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
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|
3389 "on_stack=%d", |
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|
3390 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
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|
3391 cp_ref->on_stack())); |
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|
3392 |
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3393 // If the constant pool for this previous version of the class |
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3394 // is not marked as being on the stack, then none of the methods |
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3395 // in this previous version of the class are on the stack so |
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|
3396 // we don't need to create a new PreviousVersionNode. However, |
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|
3397 // we still need to examine older previous versions below. |
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|
3398 Array<Method*>* old_methods = ikh->methods(); |
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3399 |
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|
3400 if (cp_ref->on_stack()) { |
0 | 3401 PreviousVersionNode * pv_node = NULL; |
3402 if (emcp_method_count == 0) { | |
6725
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|
3403 // non-shared ConstantPool gets a reference |
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|
3404 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
0 | 3405 RC_TRACE(0x00000400, |
6725
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3406 ("add: all methods are obsolete; flushing any EMCP refs")); |
0 | 3407 } else { |
3408 int local_count = 0; | |
6725
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3409 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
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3410 GrowableArray<Method*>(emcp_method_count, true); |
0 | 3411 for (int i = 0; i < old_methods->length(); i++) { |
3412 if (emcp_methods->at(i)) { | |
6725
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|
3413 // this old method is EMCP. Save it only if it's on the stack |
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|
3414 Method* old_method = old_methods->at(i); |
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3415 if (old_method->on_stack()) { |
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|
3416 method_refs->append(old_method); |
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|
3417 } |
0 | 3418 if (++local_count >= emcp_method_count) { |
3419 // no more EMCP methods so bail out now | |
3420 break; | |
3421 } | |
3422 } | |
3423 } | |
6725
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|
3424 // non-shared ConstantPool gets a reference |
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|
3425 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
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|
3426 } |
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|
3427 // append new previous version. |
0 | 3428 _previous_versions->append(pv_node); |
6725
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|
3429 } |
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|
3430 |
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|
3431 // Since the caller is the VMThread and we are at a safepoint, this |
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|
3432 // is a good time to clear out unused references. |
0 | 3433 |
3434 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
3435 _previous_versions->length())); | |
3436 | |
6725
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|
3437 // Purge previous versions not executing on the stack |
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|
3438 purge_previous_versions_internal(this, emcp_method_count); |
0 | 3439 |
3440 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
3441 | |
3442 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
6725
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|
3443 _previous_versions->length() > 0) { |
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|
3444 // We have a mix of obsolete and EMCP methods so we have to |
0 | 3445 // clear out any matching EMCP method entries the hard way. |
3446 int local_count = 0; | |
3447 for (int i = 0; i < old_methods->length(); i++) { | |
3448 if (!emcp_methods->at(i)) { | |
3449 // only obsolete methods are interesting | |
6725
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|
3450 Method* old_method = old_methods->at(i); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
3451 Symbol* m_name = old_method->name(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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1972
diff
changeset
|
3452 Symbol* m_signature = old_method->signature(); |
0 | 3453 |
6725
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|
3454 // we might not have added the last entry |
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|
3455 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
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|
3456 // check the previous versions array for non executing obsolete methods |
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|
3457 PreviousVersionNode * pv_node = _previous_versions->at(j); |
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|
3458 |
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|
3459 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3460 if (method_refs == NULL) { |
3461 // We have run into a PreviousVersion generation where | |
3462 // all methods were made obsolete during that generation's | |
3463 // RedefineClasses() operation. At the time of that | |
3464 // operation, all EMCP methods were flushed so we don't | |
3465 // have to go back any further. | |
3466 // | |
3467 // A NULL method_refs is different than an empty method_refs. | |
3468 // We cannot infer any optimizations about older generations | |
3469 // from an empty method_refs for the current generation. | |
3470 break; | |
3471 } | |
3472 | |
3473 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
6725
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|
3474 Method* method = method_refs->at(k); |
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|
3475 |
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|
3476 if (!method->is_obsolete() && |
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|
3477 method->name() == m_name && |
0 | 3478 method->signature() == m_signature) { |
3479 // The current RedefineClasses() call has made all EMCP | |
3480 // versions of this method obsolete so mark it as obsolete | |
6725
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|
3481 // and remove the reference. |
0 | 3482 RC_TRACE(0x00000400, |
3483 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
3484 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
3485 | |
3486 method->set_is_obsolete(); | |
6725
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|
3487 // Leave obsolete methods on the previous version list to |
da91efe96a93
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|
3488 // clean up later. |
0 | 3489 break; |
3490 } | |
3491 } | |
3492 | |
3493 // The previous loop may not find a matching EMCP method, but | |
3494 // that doesn't mean that we can optimize and not go any | |
3495 // further back in the PreviousVersion generations. The EMCP | |
6725
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|
3496 // method for this generation could have already been deleted, |
0 | 3497 // but there still may be an older EMCP method that has not |
6725
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|
3498 // been deleted. |
0 | 3499 } |
3500 | |
3501 if (++local_count >= obsolete_method_count) { | |
3502 // no more obsolete methods so bail out now | |
3503 break; | |
3504 } | |
3505 } | |
3506 } | |
3507 } | |
3508 } // end add_previous_version() | |
3509 | |
3510 | |
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3511 // Determine if InstanceKlass has a previous version. |
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3512 bool InstanceKlass::has_previous_version() const { |
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3513 return (_previous_versions != NULL && _previous_versions->length() > 0); |
0 | 3514 } // end has_previous_version() |
3515 | |
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3516 |
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3517 Method* InstanceKlass::method_with_idnum(int idnum) { |
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3518 Method* m = NULL; |
0 | 3519 if (idnum < methods()->length()) { |
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3520 m = methods()->at(idnum); |
0 | 3521 } |
3522 if (m == NULL || m->method_idnum() != idnum) { | |
3523 for (int index = 0; index < methods()->length(); ++index) { | |
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3524 m = methods()->at(index); |
0 | 3525 if (m->method_idnum() == idnum) { |
3526 return m; | |
3527 } | |
3528 } | |
3529 } | |
3530 return m; | |
3531 } | |
3532 | |
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3533 jint InstanceKlass::get_cached_class_file_len() { |
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3534 return VM_RedefineClasses::get_cached_class_file_len(_cached_class_file); |
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3535 } |
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3536 |
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3537 unsigned char * InstanceKlass::get_cached_class_file_bytes() { |
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3538 return VM_RedefineClasses::get_cached_class_file_bytes(_cached_class_file); |
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3539 } |
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3540 |
0 | 3541 |
3542 // Construct a PreviousVersionNode entry for the array hung off | |
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3543 // the InstanceKlass. |
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3544 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
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3545 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
0 | 3546 |
3547 _prev_constant_pool = prev_constant_pool; | |
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3548 _prev_cp_is_weak = prev_cp_is_weak; |
0 | 3549 _prev_EMCP_methods = prev_EMCP_methods; |
3550 } | |
3551 | |
3552 | |
3553 // Destroy a PreviousVersionNode | |
3554 PreviousVersionNode::~PreviousVersionNode() { | |
3555 if (_prev_constant_pool != NULL) { | |
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3556 _prev_constant_pool = NULL; |
0 | 3557 } |
3558 | |
3559 if (_prev_EMCP_methods != NULL) { | |
3560 delete _prev_EMCP_methods; | |
3561 } | |
3562 } | |
3563 | |
3564 | |
3565 // Construct a PreviousVersionInfo entry | |
3566 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
3567 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
3568 _prev_EMCP_method_handles = NULL; | |
3569 | |
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3570 ConstantPool* cp = pv_node->prev_constant_pool(); |
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3571 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
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3572 if (cp == NULL) { |
0 | 3573 return; // robustness |
3574 } | |
3575 | |
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3576 // make the ConstantPool* safe to return |
0 | 3577 _prev_constant_pool_handle = constantPoolHandle(cp); |
3578 | |
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3579 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3580 if (method_refs == NULL) { |
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3581 // the InstanceKlass did not have any EMCP methods |
0 | 3582 return; |
3583 } | |
3584 | |
3585 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
3586 | |
3587 int n_methods = method_refs->length(); | |
3588 for (int i = 0; i < n_methods; i++) { | |
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3589 Method* method = method_refs->at(i); |
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3590 assert (method != NULL, "method has been cleared"); |
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3591 if (method == NULL) { |
0 | 3592 continue; // robustness |
3593 } | |
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3594 // make the Method* safe to return |
0 | 3595 _prev_EMCP_method_handles->append(methodHandle(method)); |
3596 } | |
3597 } | |
3598 | |
3599 | |
3600 // Destroy a PreviousVersionInfo | |
3601 PreviousVersionInfo::~PreviousVersionInfo() { | |
3602 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
3603 // don't have to delete it. | |
3604 } | |
3605 | |
3606 | |
3607 // Construct a helper for walking the previous versions array | |
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3608 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
0 | 3609 _previous_versions = ik->previous_versions(); |
3610 _current_index = 0; | |
3611 // _hm needs no initialization | |
3612 _current_p = NULL; | |
3613 } | |
3614 | |
3615 | |
3616 // Destroy a PreviousVersionWalker | |
3617 PreviousVersionWalker::~PreviousVersionWalker() { | |
3618 // Delete the current info just in case the caller didn't walk to | |
3619 // the end of the previous versions list. No harm if _current_p is | |
3620 // already NULL. | |
3621 delete _current_p; | |
3622 | |
3623 // When _hm is destroyed, all the Handles returned in | |
3624 // PreviousVersionInfo objects will be destroyed. | |
3625 // Also, after this destructor is finished it will be | |
3626 // safe to delete the GrowableArray allocated in the | |
3627 // PreviousVersionInfo objects. | |
3628 } | |
3629 | |
3630 | |
3631 // Return the interesting information for the next previous version | |
3632 // of the klass. Returns NULL if there are no more previous versions. | |
3633 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
3634 if (_previous_versions == NULL) { | |
3635 // no previous versions so nothing to return | |
3636 return NULL; | |
3637 } | |
3638 | |
3639 delete _current_p; // cleanup the previous info for the caller | |
3640 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
3641 | |
3642 int length = _previous_versions->length(); | |
3643 | |
3644 while (_current_index < length) { | |
3645 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
6197 | 3646 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
0 | 3647 PreviousVersionInfo(pv_node); |
3648 | |
3649 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
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3650 assert (!cp_h.is_null(), "null cp found in previous version"); |
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3651 |
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3652 // The caller will need to delete pv_info when they are done with it. |
0 | 3653 _current_p = pv_info; |
3654 return pv_info; | |
3655 } | |
3656 | |
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3657 // all of the underlying nodes' info has been deleted |
0 | 3658 return NULL; |
3659 } // end next_previous_version() |