Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.cpp @ 10975:ab313d4e9a8b
8011968: Kitchensink crashed with SIGSEGV in MemBaseline::baseline
Summary: Simple fix to add NULL pointer check that can cause segv
Reviewed-by: coleenp, ctornqvi
author | zgu |
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date | Fri, 14 Jun 2013 09:18:42 -0400 |
parents | 6c138b9851fb |
children | 836a62f43af9 e0c9a1d29eb4 |
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/methodComparator.hpp" |
1972 | 52 #include "runtime/fieldDescriptor.hpp" |
53 #include "runtime/handles.inline.hpp" | |
54 #include "runtime/javaCalls.hpp" | |
55 #include "runtime/mutexLocker.hpp" | |
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56 #include "runtime/thread.inline.hpp" |
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57 #include "services/classLoadingService.hpp" |
1972 | 58 #include "services/threadService.hpp" |
59 #include "utilities/dtrace.hpp" | |
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60 #include "utilities/macros.hpp" |
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61 #if INCLUDE_ALL_GCS |
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62 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
1972 | 63 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
64 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
65 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
66 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
67 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
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68 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
1972 | 69 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
70 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
71 #include "oops/oop.pcgc.inline.hpp" | |
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72 #endif // INCLUDE_ALL_GCS |
1972 | 73 #ifdef COMPILER1 |
74 #include "c1/c1_Compiler.hpp" | |
75 #endif | |
0 | 76 |
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77 #ifdef DTRACE_ENABLED |
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78 |
4006 | 79 #ifndef USDT2 |
80 | |
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81 HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required, |
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82 char*, intptr_t, oop, intptr_t); |
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83 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive, |
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84 char*, intptr_t, oop, intptr_t, int); |
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85 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent, |
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86 char*, intptr_t, oop, intptr_t, int); |
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87 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous, |
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88 char*, intptr_t, oop, intptr_t, int); |
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89 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed, |
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90 char*, intptr_t, oop, intptr_t, int); |
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91 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit, |
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92 char*, intptr_t, oop, intptr_t, int); |
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93 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error, |
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94 char*, intptr_t, oop, intptr_t, int); |
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95 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end, |
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96 char*, intptr_t, oop, intptr_t, int); |
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97 |
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98 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ |
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99 { \ |
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100 char* data = NULL; \ |
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101 int len = 0; \ |
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102 Symbol* name = (clss)->name(); \ |
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103 if (name != NULL) { \ |
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104 data = (char*)name->bytes(); \ |
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105 len = name->utf8_length(); \ |
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106 } \ |
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107 HS_DTRACE_PROBE4(hotspot, class__initialization__##type, \ |
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108 data, len, (clss)->class_loader(), thread_type); \ |
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109 } |
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110 |
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111 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ |
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112 { \ |
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113 char* data = NULL; \ |
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114 int len = 0; \ |
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115 Symbol* name = (clss)->name(); \ |
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116 if (name != NULL) { \ |
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117 data = (char*)name->bytes(); \ |
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118 len = name->utf8_length(); \ |
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119 } \ |
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120 HS_DTRACE_PROBE5(hotspot, class__initialization__##type, \ |
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121 data, len, (clss)->class_loader(), thread_type, wait); \ |
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122 } |
4006 | 123 #else /* USDT2 */ |
124 | |
125 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED | |
126 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE | |
127 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT | |
128 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS | |
129 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED | |
130 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT | |
131 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR | |
132 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END | |
133 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ | |
134 { \ | |
135 char* data = NULL; \ | |
136 int len = 0; \ | |
137 Symbol* name = (clss)->name(); \ | |
138 if (name != NULL) { \ | |
139 data = (char*)name->bytes(); \ | |
140 len = name->utf8_length(); \ | |
141 } \ | |
142 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
143 data, len, (clss)->class_loader(), thread_type); \ | |
144 } | |
145 | |
146 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ | |
147 { \ | |
148 char* data = NULL; \ | |
149 int len = 0; \ | |
150 Symbol* name = (clss)->name(); \ | |
151 if (name != NULL) { \ | |
152 data = (char*)name->bytes(); \ | |
153 len = name->utf8_length(); \ | |
154 } \ | |
155 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
156 data, len, (clss)->class_loader(), thread_type, wait); \ | |
157 } | |
158 #endif /* USDT2 */ | |
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159 |
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160 #else // ndef DTRACE_ENABLED |
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161 |
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162 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) |
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163 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) |
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164 |
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165 #endif // ndef DTRACE_ENABLED |
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166 |
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167 volatile int InstanceKlass::_total_instanceKlass_count = 0; |
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168 |
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169 InstanceKlass* InstanceKlass::allocate_instance_klass( |
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170 ClassLoaderData* loader_data, |
8031 | 171 int vtable_len, |
172 int itable_len, | |
173 int static_field_size, | |
174 int nonstatic_oop_map_size, | |
175 ReferenceType rt, | |
176 AccessFlags access_flags, | |
177 Symbol* name, | |
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178 Klass* super_klass, |
8031 | 179 bool is_anonymous, |
180 TRAPS) { | |
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181 |
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182 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
8031 | 183 access_flags.is_interface(), is_anonymous); |
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184 |
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185 // Allocation |
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186 InstanceKlass* ik; |
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187 if (rt == REF_NONE) { |
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188 if (name == vmSymbols::java_lang_Class()) { |
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189 ik = new (loader_data, size, THREAD) InstanceMirrorKlass( |
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190 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 191 access_flags, is_anonymous); |
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192 } else if (name == vmSymbols::java_lang_ClassLoader() || |
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193 (SystemDictionary::ClassLoader_klass_loaded() && |
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194 super_klass != NULL && |
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195 super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass()))) { |
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196 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass( |
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197 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 198 access_flags, is_anonymous); |
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199 } else { |
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200 // normal class |
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201 ik = new (loader_data, size, THREAD) InstanceKlass( |
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202 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 203 access_flags, is_anonymous); |
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204 } |
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205 } else { |
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206 // reference klass |
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207 ik = new (loader_data, size, THREAD) InstanceRefKlass( |
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208 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 209 access_flags, is_anonymous); |
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210 } |
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211 |
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212 // Check for pending exception before adding to the loader data and incrementing |
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213 // class count. Can get OOM here. |
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214 if (HAS_PENDING_EXCEPTION) { |
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215 return NULL; |
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216 } |
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217 |
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218 // Add all classes to our internal class loader list here, |
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219 // including classes in the bootstrap (NULL) class loader. |
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220 loader_data->add_class(ik); |
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221 |
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222 Atomic::inc(&_total_instanceKlass_count); |
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223 return ik; |
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224 } |
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225 |
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226 |
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227 // copy method ordering from resource area to Metaspace |
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228 void InstanceKlass::copy_method_ordering(intArray* m, TRAPS) { |
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229 if (m != NULL) { |
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230 // allocate a new array and copy contents (memcpy?) |
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231 _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK); |
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232 for (int i = 0; i < m->length(); i++) { |
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233 _method_ordering->at_put(i, m->at(i)); |
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234 } |
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235 } else { |
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236 _method_ordering = Universe::the_empty_int_array(); |
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237 } |
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238 } |
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239 |
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240 |
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241 InstanceKlass::InstanceKlass(int vtable_len, |
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242 int itable_len, |
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243 int static_field_size, |
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244 int nonstatic_oop_map_size, |
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245 ReferenceType rt, |
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246 AccessFlags access_flags, |
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247 bool is_anonymous) { |
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248 No_Safepoint_Verifier no_safepoint; // until k becomes parsable |
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249 |
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250 int iksize = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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251 access_flags.is_interface(), is_anonymous); |
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252 |
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253 set_vtable_length(vtable_len); |
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254 set_itable_length(itable_len); |
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255 set_static_field_size(static_field_size); |
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256 set_nonstatic_oop_map_size(nonstatic_oop_map_size); |
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257 set_access_flags(access_flags); |
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258 _misc_flags = 0; // initialize to zero |
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259 set_is_anonymous(is_anonymous); |
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260 assert(size() == iksize, "wrong size for object"); |
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261 |
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262 set_array_klasses(NULL); |
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263 set_methods(NULL); |
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264 set_method_ordering(NULL); |
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265 set_local_interfaces(NULL); |
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266 set_transitive_interfaces(NULL); |
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267 init_implementor(); |
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268 set_fields(NULL, 0); |
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269 set_constants(NULL); |
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270 set_class_loader_data(NULL); |
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271 set_source_file_name(NULL); |
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272 set_source_debug_extension(NULL, 0); |
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273 set_array_name(NULL); |
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274 set_inner_classes(NULL); |
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275 set_static_oop_field_count(0); |
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276 set_nonstatic_field_size(0); |
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277 set_is_marked_dependent(false); |
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278 set_init_state(InstanceKlass::allocated); |
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279 set_init_thread(NULL); |
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280 set_reference_type(rt); |
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281 set_oop_map_cache(NULL); |
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282 set_jni_ids(NULL); |
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283 set_osr_nmethods_head(NULL); |
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284 set_breakpoints(NULL); |
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285 init_previous_versions(); |
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286 set_generic_signature(NULL); |
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287 release_set_methods_jmethod_ids(NULL); |
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288 release_set_methods_cached_itable_indices(NULL); |
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289 set_annotations(NULL); |
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290 set_jvmti_cached_class_field_map(NULL); |
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291 set_initial_method_idnum(0); |
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292 _dependencies = NULL; |
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293 set_jvmti_cached_class_field_map(NULL); |
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294 set_cached_class_file(NULL, 0); |
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295 set_initial_method_idnum(0); |
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296 set_minor_version(0); |
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297 set_major_version(0); |
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298 NOT_PRODUCT(_verify_count = 0;) |
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299 |
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300 // initialize the non-header words to zero |
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301 intptr_t* p = (intptr_t*)this; |
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302 for (int index = InstanceKlass::header_size(); index < iksize; index++) { |
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303 p[index] = NULL_WORD; |
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304 } |
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305 |
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306 // Set temporary value until parseClassFile updates it with the real instance |
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307 // size. |
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308 set_layout_helper(Klass::instance_layout_helper(0, true)); |
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309 } |
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310 |
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311 |
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312 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data, |
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313 Array<Method*>* methods) { |
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314 if (methods != NULL && methods != Universe::the_empty_method_array()) { |
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315 for (int i = 0; i < methods->length(); i++) { |
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316 Method* method = methods->at(i); |
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317 if (method == NULL) continue; // maybe null if error processing |
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318 // Only want to delete methods that are not executing for RedefineClasses. |
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319 // The previous version will point to them so they're not totally dangling |
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320 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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321 MetadataFactory::free_metadata(loader_data, method); |
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322 } |
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323 MetadataFactory::free_array<Method*>(loader_data, methods); |
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324 } |
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325 } |
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326 |
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327 void InstanceKlass::deallocate_interfaces(ClassLoaderData* loader_data, |
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328 Klass* super_klass, |
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329 Array<Klass*>* local_interfaces, |
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330 Array<Klass*>* transitive_interfaces) { |
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331 // Only deallocate transitive interfaces if not empty, same as super class |
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332 // or same as local interfaces. See code in parseClassFile. |
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333 Array<Klass*>* ti = transitive_interfaces; |
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334 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces) { |
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335 // check that the interfaces don't come from super class |
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336 Array<Klass*>* sti = (super_klass == NULL) ? NULL : |
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337 InstanceKlass::cast(super_klass)->transitive_interfaces(); |
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338 if (ti != sti) { |
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339 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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340 } |
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341 } |
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342 |
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343 // local interfaces can be empty |
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344 if (local_interfaces != Universe::the_empty_klass_array()) { |
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345 MetadataFactory::free_array<Klass*>(loader_data, local_interfaces); |
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346 } |
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347 } |
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348 |
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349 // This function deallocates the metadata and C heap pointers that the |
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350 // InstanceKlass points to. |
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351 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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352 |
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353 // Orphan the mirror first, CMS thinks it's still live. |
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354 if (java_mirror() != NULL) { |
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355 java_lang_Class::set_klass(java_mirror(), NULL); |
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356 } |
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357 |
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358 // Need to take this class off the class loader data list. |
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359 loader_data->remove_class(this); |
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360 |
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361 // The array_klass for this class is created later, after error handling. |
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362 // For class redefinition, we keep the original class so this scratch class |
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363 // doesn't have an array class. Either way, assert that there is nothing |
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364 // to deallocate. |
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365 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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366 |
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367 // Release C heap allocated data that this might point to, which includes |
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368 // reference counting symbol names. |
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369 release_C_heap_structures(); |
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370 |
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371 deallocate_methods(loader_data, methods()); |
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372 set_methods(NULL); |
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373 |
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374 if (method_ordering() != Universe::the_empty_int_array()) { |
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375 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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376 } |
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377 set_method_ordering(NULL); |
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378 |
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379 // This array is in Klass, but remove it with the InstanceKlass since |
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380 // this place would be the only caller and it can share memory with transitive |
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381 // interfaces. |
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382 if (secondary_supers() != Universe::the_empty_klass_array() && |
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383 secondary_supers() != transitive_interfaces()) { |
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384 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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385 } |
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386 set_secondary_supers(NULL); |
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387 |
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388 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces()); |
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389 set_transitive_interfaces(NULL); |
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390 set_local_interfaces(NULL); |
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391 |
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392 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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393 set_fields(NULL, 0); |
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394 |
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395 // If a method from a redefined class is using this constant pool, don't |
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396 // delete it, yet. The new class's previous version will point to this. |
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397 if (constants() != NULL) { |
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398 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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399 MetadataFactory::free_metadata(loader_data, constants()); |
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400 set_constants(NULL); |
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401 } |
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402 |
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403 if (inner_classes() != Universe::the_empty_short_array()) { |
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404 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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405 } |
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406 set_inner_classes(NULL); |
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407 |
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408 // We should deallocate the Annotations instance |
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409 MetadataFactory::free_metadata(loader_data, annotations()); |
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410 set_annotations(NULL); |
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411 } |
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412 |
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413 bool InstanceKlass::should_be_initialized() const { |
0 | 414 return !is_initialized(); |
415 } | |
416 | |
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417 klassVtable* InstanceKlass::vtable() const { |
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418 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
0 | 419 } |
420 | |
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421 klassItable* InstanceKlass::itable() const { |
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422 return new klassItable(instanceKlassHandle(this)); |
0 | 423 } |
424 | |
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425 void InstanceKlass::eager_initialize(Thread *thread) { |
0 | 426 if (!EagerInitialization) return; |
427 | |
428 if (this->is_not_initialized()) { | |
429 // abort if the the class has a class initializer | |
430 if (this->class_initializer() != NULL) return; | |
431 | |
432 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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433 Klass* super = this->super(); |
0 | 434 if (super == NULL) return; |
435 | |
436 // abort if the super class should be initialized | |
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437 if (!InstanceKlass::cast(super)->is_initialized()) return; |
0 | 438 |
439 // call body to expose the this pointer | |
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440 instanceKlassHandle this_oop(thread, this); |
0 | 441 eager_initialize_impl(this_oop); |
442 } | |
443 } | |
444 | |
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445 // JVMTI spec thinks there are signers and protection domain in the |
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446 // instanceKlass. These accessors pretend these fields are there. |
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447 // The hprof specification also thinks these fields are in InstanceKlass. |
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448 oop InstanceKlass::protection_domain() const { |
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449 // return the protection_domain from the mirror |
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450 return java_lang_Class::protection_domain(java_mirror()); |
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451 } |
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452 |
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453 // To remove these from requires an incompatible change and CCC request. |
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454 objArrayOop InstanceKlass::signers() const { |
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455 // return the signers from the mirror |
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456 return java_lang_Class::signers(java_mirror()); |
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457 } |
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458 |
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459 volatile oop InstanceKlass::init_lock() const { |
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460 // return the init lock from the mirror |
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461 return java_lang_Class::init_lock(java_mirror()); |
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462 } |
0 | 463 |
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464 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
0 | 465 EXCEPTION_MARK; |
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466 volatile oop init_lock = this_oop->init_lock(); |
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467 ObjectLocker ol(init_lock, THREAD); |
0 | 468 |
469 // abort if someone beat us to the initialization | |
470 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
471 | |
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472 ClassState old_state = this_oop->init_state(); |
0 | 473 link_class_impl(this_oop, true, THREAD); |
474 if (HAS_PENDING_EXCEPTION) { | |
475 CLEAR_PENDING_EXCEPTION; | |
476 // Abort if linking the class throws an exception. | |
477 | |
478 // Use a test to avoid redundantly resetting the state if there's | |
479 // no change. Set_init_state() asserts that state changes make | |
480 // progress, whereas here we might just be spinning in place. | |
481 if( old_state != this_oop->_init_state ) | |
482 this_oop->set_init_state (old_state); | |
483 } else { | |
484 // linking successfull, mark class as initialized | |
485 this_oop->set_init_state (fully_initialized); | |
486 // trace | |
487 if (TraceClassInitialization) { | |
488 ResourceMark rm(THREAD); | |
489 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
490 } | |
491 } | |
492 } | |
493 | |
494 | |
495 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
496 // process. The step comments refers to the procedure described in that section. | |
497 // Note: implementation moved to static method to expose the this pointer. | |
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498 void InstanceKlass::initialize(TRAPS) { |
0 | 499 if (this->should_be_initialized()) { |
500 HandleMark hm(THREAD); | |
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501 instanceKlassHandle this_oop(THREAD, this); |
0 | 502 initialize_impl(this_oop, CHECK); |
503 // Note: at this point the class may be initialized | |
504 // OR it may be in the state of being initialized | |
505 // in case of recursive initialization! | |
506 } else { | |
507 assert(is_initialized(), "sanity check"); | |
508 } | |
509 } | |
510 | |
511 | |
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512 bool InstanceKlass::verify_code( |
0 | 513 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
514 // 1) Verify the bytecodes | |
515 Verifier::Mode mode = | |
516 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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517 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
0 | 518 } |
519 | |
520 | |
521 // Used exclusively by the shared spaces dump mechanism to prevent | |
522 // classes mapped into the shared regions in new VMs from appearing linked. | |
523 | |
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524 void InstanceKlass::unlink_class() { |
0 | 525 assert(is_linked(), "must be linked"); |
526 _init_state = loaded; | |
527 } | |
528 | |
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529 void InstanceKlass::link_class(TRAPS) { |
0 | 530 assert(is_loaded(), "must be loaded"); |
531 if (!is_linked()) { | |
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532 HandleMark hm(THREAD); |
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533 instanceKlassHandle this_oop(THREAD, this); |
0 | 534 link_class_impl(this_oop, true, CHECK); |
535 } | |
536 } | |
537 | |
538 // Called to verify that a class can link during initialization, without | |
539 // throwing a VerifyError. | |
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540 bool InstanceKlass::link_class_or_fail(TRAPS) { |
0 | 541 assert(is_loaded(), "must be loaded"); |
542 if (!is_linked()) { | |
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543 HandleMark hm(THREAD); |
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544 instanceKlassHandle this_oop(THREAD, this); |
0 | 545 link_class_impl(this_oop, false, CHECK_false); |
546 } | |
547 return is_linked(); | |
548 } | |
549 | |
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550 bool InstanceKlass::link_class_impl( |
0 | 551 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
552 // check for error state | |
553 if (this_oop->is_in_error_state()) { | |
554 ResourceMark rm(THREAD); | |
555 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
556 this_oop->external_name(), false); | |
557 } | |
558 // return if already verified | |
559 if (this_oop->is_linked()) { | |
560 return true; | |
561 } | |
562 | |
563 // Timing | |
564 // timer handles recursion | |
565 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
566 JavaThread* jt = (JavaThread*)THREAD; | |
567 | |
568 // link super class before linking this class | |
569 instanceKlassHandle super(THREAD, this_oop->super()); | |
570 if (super.not_null()) { | |
571 if (super->is_interface()) { // check if super class is an interface | |
572 ResourceMark rm(THREAD); | |
573 Exceptions::fthrow( | |
574 THREAD_AND_LOCATION, | |
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575 vmSymbols::java_lang_IncompatibleClassChangeError(), |
0 | 576 "class %s has interface %s as super class", |
577 this_oop->external_name(), | |
578 super->external_name() | |
579 ); | |
580 return false; | |
581 } | |
582 | |
583 link_class_impl(super, throw_verifyerror, CHECK_false); | |
584 } | |
585 | |
586 // link all interfaces implemented by this class before linking this class | |
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587 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
0 | 588 int num_interfaces = interfaces->length(); |
589 for (int index = 0; index < num_interfaces; index++) { | |
590 HandleMark hm(THREAD); | |
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591 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
0 | 592 link_class_impl(ih, throw_verifyerror, CHECK_false); |
593 } | |
594 | |
595 // in case the class is linked in the process of linking its superclasses | |
596 if (this_oop->is_linked()) { | |
597 return true; | |
598 } | |
599 | |
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600 // trace only the link time for this klass that includes |
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601 // the verification time |
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602 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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603 ClassLoader::perf_class_link_selftime(), |
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604 ClassLoader::perf_classes_linked(), |
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605 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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606 jt->get_thread_stat()->perf_timers_addr(), |
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607 PerfClassTraceTime::CLASS_LINK); |
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608 |
0 | 609 // verification & rewriting |
610 { | |
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611 volatile oop init_lock = this_oop->init_lock(); |
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612 ObjectLocker ol(init_lock, THREAD); |
0 | 613 // rewritten will have been set if loader constraint error found |
614 // on an earlier link attempt | |
615 // don't verify or rewrite if already rewritten | |
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616 |
0 | 617 if (!this_oop->is_linked()) { |
618 if (!this_oop->is_rewritten()) { | |
619 { | |
620 // Timer includes any side effects of class verification (resolution, | |
621 // etc), but not recursive entry into verify_code(). | |
875
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622 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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623 ClassLoader::perf_class_verify_selftime(), |
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624 ClassLoader::perf_classes_verified(), |
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625 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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626 jt->get_thread_stat()->perf_timers_addr(), |
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627 PerfClassTraceTime::CLASS_VERIFY); |
0 | 628 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
629 if (!verify_ok) { | |
630 return false; | |
631 } | |
632 } | |
633 | |
634 // Just in case a side-effect of verify linked this class already | |
635 // (which can sometimes happen since the verifier loads classes | |
636 // using custom class loaders, which are free to initialize things) | |
637 if (this_oop->is_linked()) { | |
638 return true; | |
639 } | |
640 | |
641 // also sets rewritten | |
642 this_oop->rewrite_class(CHECK_false); | |
643 } | |
644 | |
3748 | 645 // relocate jsrs and link methods after they are all rewritten |
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646 this_oop->link_methods(CHECK_false); |
3748 | 647 |
0 | 648 // Initialize the vtable and interface table after |
649 // methods have been rewritten since rewrite may | |
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650 // fabricate new Method*s. |
0 | 651 // also does loader constraint checking |
652 if (!this_oop()->is_shared()) { | |
653 ResourceMark rm(THREAD); | |
654 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
655 this_oop->itable()->initialize_itable(true, CHECK_false); | |
656 } | |
657 #ifdef ASSERT | |
658 else { | |
659 ResourceMark rm(THREAD); | |
660 this_oop->vtable()->verify(tty, true); | |
661 // In case itable verification is ever added. | |
662 // this_oop->itable()->verify(tty, true); | |
663 } | |
664 #endif | |
665 this_oop->set_init_state(linked); | |
666 if (JvmtiExport::should_post_class_prepare()) { | |
667 Thread *thread = THREAD; | |
668 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
669 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
670 } | |
671 } | |
672 } | |
673 return true; | |
674 } | |
675 | |
676 | |
677 // Rewrite the byte codes of all of the methods of a class. | |
678 // The rewriter must be called exactly once. Rewriting must happen after | |
679 // verification but before the first method of the class is executed. | |
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680 void InstanceKlass::rewrite_class(TRAPS) { |
0 | 681 assert(is_loaded(), "must be loaded"); |
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682 instanceKlassHandle this_oop(THREAD, this); |
0 | 683 if (this_oop->is_rewritten()) { |
684 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
685 return; | |
686 } | |
3748 | 687 Rewriter::rewrite(this_oop, CHECK); |
0 | 688 this_oop->set_rewritten(); |
689 } | |
690 | |
3748 | 691 // Now relocate and link method entry points after class is rewritten. |
692 // This is outside is_rewritten flag. In case of an exception, it can be | |
693 // executed more than once. | |
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694 void InstanceKlass::link_methods(TRAPS) { |
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695 int len = methods()->length(); |
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696 for (int i = len-1; i >= 0; i--) { |
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697 methodHandle m(THREAD, methods()->at(i)); |
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698 |
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699 // Set up method entry points for compiler and interpreter . |
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700 m->link_method(m, CHECK); |
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701 |
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702 // This is for JVMTI and unrelated to relocator but the last thing we do |
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703 #ifdef ASSERT |
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704 if (StressMethodComparator) { |
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705 ResourceMark rm(THREAD); |
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706 static int nmc = 0; |
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707 for (int j = i; j >= 0 && j >= i-4; j--) { |
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708 if ((++nmc % 1000) == 0) tty->print_cr("Have run MethodComparator %d times...", nmc); |
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709 bool z = MethodComparator::methods_EMCP(m(), |
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710 methods()->at(j)); |
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711 if (j == i && !z) { |
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712 tty->print("MethodComparator FAIL: "); m->print(); m->print_codes(); |
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713 assert(z, "method must compare equal to itself"); |
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714 } |
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715 } |
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716 } |
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717 #endif //ASSERT |
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718 } |
3748 | 719 } |
720 | |
0 | 721 |
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722 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
0 | 723 // Make sure klass is linked (verified) before initialization |
724 // A class could already be verified, since it has been reflected upon. | |
725 this_oop->link_class(CHECK); | |
726 | |
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727 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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728 |
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729 bool wait = false; |
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730 |
0 | 731 // refer to the JVM book page 47 for description of steps |
732 // Step 1 | |
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733 { |
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734 volatile oop init_lock = this_oop->init_lock(); |
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735 ObjectLocker ol(init_lock, THREAD); |
0 | 736 |
737 Thread *self = THREAD; // it's passed the current thread | |
738 | |
739 // Step 2 | |
740 // If we were to use wait() instead of waitInterruptibly() then | |
741 // we might end up throwing IE from link/symbol resolution sites | |
742 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
743 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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744 wait = true; |
0 | 745 ol.waitUninterruptibly(CHECK); |
746 } | |
747 | |
748 // Step 3 | |
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749 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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750 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 751 return; |
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752 } |
0 | 753 |
754 // Step 4 | |
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755 if (this_oop->is_initialized()) { |
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756 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 757 return; |
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758 } |
0 | 759 |
760 // Step 5 | |
761 if (this_oop->is_in_error_state()) { | |
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762 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 763 ResourceMark rm(THREAD); |
764 const char* desc = "Could not initialize class "; | |
765 const char* className = this_oop->external_name(); | |
766 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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767 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 768 if (NULL == message) { |
769 // Out of memory: can't create detailed error message | |
770 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
771 } else { | |
772 jio_snprintf(message, msglen, "%s%s", desc, className); | |
773 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
774 } | |
775 } | |
776 | |
777 // Step 6 | |
778 this_oop->set_init_state(being_initialized); | |
779 this_oop->set_init_thread(self); | |
780 } | |
781 | |
782 // Step 7 | |
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783 Klass* super_klass = this_oop->super(); |
6983 | 784 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
785 super_klass->initialize(THREAD); | |
0 | 786 |
787 if (HAS_PENDING_EXCEPTION) { | |
788 Handle e(THREAD, PENDING_EXCEPTION); | |
789 CLEAR_PENDING_EXCEPTION; | |
790 { | |
791 EXCEPTION_MARK; | |
792 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
793 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
794 } | |
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795 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 796 THROW_OOP(e()); |
797 } | |
798 } | |
799 | |
6934 | 800 if (this_oop->has_default_methods()) { |
801 // Step 7.5: initialize any interfaces which have default methods | |
802 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
803 Klass* iface = this_oop->local_interfaces()->at(i); | |
804 InstanceKlass* ik = InstanceKlass::cast(iface); | |
805 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
806 ik->initialize(THREAD); | |
807 | |
808 if (HAS_PENDING_EXCEPTION) { | |
809 Handle e(THREAD, PENDING_EXCEPTION); | |
810 CLEAR_PENDING_EXCEPTION; | |
811 { | |
812 EXCEPTION_MARK; | |
813 // Locks object, set state, and notify all waiting threads | |
814 this_oop->set_initialization_state_and_notify( | |
815 initialization_error, THREAD); | |
816 | |
817 // ignore any exception thrown, superclass initialization error is | |
818 // thrown below | |
819 CLEAR_PENDING_EXCEPTION; | |
820 } | |
821 DTRACE_CLASSINIT_PROBE_WAIT( | |
822 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
823 THROW_OOP(e()); | |
824 } | |
825 } | |
826 } | |
827 } | |
828 | |
0 | 829 // Step 8 |
830 { | |
831 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
832 JavaThread* jt = (JavaThread*)THREAD; | |
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833 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 834 // Timer includes any side effects of class initialization (resolution, |
835 // etc), but not recursive entry into call_class_initializer(). | |
875
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836 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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837 ClassLoader::perf_class_init_selftime(), |
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838 ClassLoader::perf_classes_inited(), |
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839 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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840 jt->get_thread_stat()->perf_timers_addr(), |
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841 PerfClassTraceTime::CLASS_CLINIT); |
0 | 842 this_oop->call_class_initializer(THREAD); |
843 } | |
844 | |
845 // Step 9 | |
846 if (!HAS_PENDING_EXCEPTION) { | |
847 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
848 { ResourceMark rm(THREAD); | |
849 debug_only(this_oop->vtable()->verify(tty, true);) | |
850 } | |
851 } | |
852 else { | |
853 // Step 10 and 11 | |
854 Handle e(THREAD, PENDING_EXCEPTION); | |
855 CLEAR_PENDING_EXCEPTION; | |
856 { | |
857 EXCEPTION_MARK; | |
858 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
859 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
860 } | |
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861 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
1142 | 862 if (e->is_a(SystemDictionary::Error_klass())) { |
0 | 863 THROW_OOP(e()); |
864 } else { | |
865 JavaCallArguments args(e); | |
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866 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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867 vmSymbols::throwable_void_signature(), |
0 | 868 &args); |
869 } | |
870 } | |
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871 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 872 } |
873 | |
874 | |
875 // Note: implementation moved to static method to expose the this pointer. | |
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876 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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877 instanceKlassHandle kh(THREAD, this); |
0 | 878 set_initialization_state_and_notify_impl(kh, state, CHECK); |
879 } | |
880 | |
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881 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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882 volatile oop init_lock = this_oop->init_lock(); |
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883 ObjectLocker ol(init_lock, THREAD); |
0 | 884 this_oop->set_init_state(state); |
885 ol.notify_all(CHECK); | |
886 } | |
887 | |
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888 // The embedded _implementor field can only record one implementor. |
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889 // When there are more than one implementors, the _implementor field |
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890 // is set to the interface Klass* itself. Following are the possible |
5998
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891 // values for the _implementor field: |
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892 // NULL - no implementor |
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893 // implementor Klass* - one implementor |
5998
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894 // self - more than one implementor |
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895 // |
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896 // The _implementor field only exists for interfaces. |
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897 void InstanceKlass::add_implementor(Klass* k) { |
0 | 898 assert(Compile_lock->owned_by_self(), ""); |
5998
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899 assert(is_interface(), "not interface"); |
0 | 900 // Filter out my subinterfaces. |
901 // (Note: Interfaces are never on the subklass list.) | |
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902 if (InstanceKlass::cast(k)->is_interface()) return; |
0 | 903 |
904 // Filter out subclasses whose supers already implement me. | |
905 // (Note: CHA must walk subclasses of direct implementors | |
906 // in order to locate indirect implementors.) | |
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907 Klass* sk = InstanceKlass::cast(k)->super(); |
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908 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
0 | 909 // We only need to check one immediate superclass, since the |
910 // implements_interface query looks at transitive_interfaces. | |
911 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
912 return; | |
913 | |
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914 Klass* ik = implementor(); |
5998
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915 if (ik == NULL) { |
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916 set_implementor(k); |
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917 } else if (ik != this) { |
5998
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918 // There is already an implementor. Use itself as an indicator of |
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919 // more than one implementors. |
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920 set_implementor(this); |
0 | 921 } |
922 | |
923 // The implementor also implements the transitive_interfaces | |
924 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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925 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
0 | 926 } |
927 } | |
928 | |
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929 void InstanceKlass::init_implementor() { |
5998
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930 if (is_interface()) { |
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931 set_implementor(NULL); |
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932 } |
0 | 933 } |
934 | |
935 | |
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936 void InstanceKlass::process_interfaces(Thread *thread) { |
0 | 937 // link this class into the implementors list of every interface it implements |
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938 Klass* this_as_klass_oop = this; |
0 | 939 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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940 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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941 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
0 | 942 assert(interf->is_interface(), "expected interface"); |
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943 interf->add_implementor(this_as_klass_oop); |
0 | 944 } |
945 } | |
946 | |
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947 bool InstanceKlass::can_be_primary_super_slow() const { |
0 | 948 if (is_interface()) |
949 return false; | |
950 else | |
951 return Klass::can_be_primary_super_slow(); | |
952 } | |
953 | |
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954 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
0 | 955 // The secondaries are the implemented interfaces. |
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956 InstanceKlass* ik = InstanceKlass::cast(this); |
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957 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
0 | 958 int num_secondaries = num_extra_slots + interfaces->length(); |
959 if (num_secondaries == 0) { | |
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960 // Must share this for correct bootstrapping! |
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961 set_secondary_supers(Universe::the_empty_klass_array()); |
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962 return NULL; |
0 | 963 } else if (num_extra_slots == 0) { |
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964 // The secondary super list is exactly the same as the transitive interfaces. |
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965 // Redefine classes has to be careful not to delete this! |
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966 set_secondary_supers(interfaces); |
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967 return NULL; |
0 | 968 } else { |
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969 // Copy transitive interfaces to a temporary growable array to be constructed |
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970 // into the secondary super list with extra slots. |
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971 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
0 | 972 for (int i = 0; i < interfaces->length(); i++) { |
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973 secondaries->push(interfaces->at(i)); |
0 | 974 } |
975 return secondaries; | |
976 } | |
977 } | |
978 | |
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979 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
6983 | 980 if (k->is_interface()) { |
0 | 981 return implements_interface(k); |
982 } else { | |
983 return Klass::compute_is_subtype_of(k); | |
984 } | |
985 } | |
986 | |
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987 bool InstanceKlass::implements_interface(Klass* k) const { |
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988 if (this == k) return true; |
6983 | 989 assert(k->is_interface(), "should be an interface class"); |
0 | 990 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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991 if (transitive_interfaces()->at(i) == k) { |
0 | 992 return true; |
993 } | |
994 } | |
995 return false; | |
996 } | |
997 | |
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998 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
0 | 999 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
1000 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
876
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1001 report_java_out_of_memory("Requested array size exceeds VM limit"); |
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1002 JvmtiExport::post_array_size_exhausted(); |
0 | 1003 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
1004 } | |
1005 int size = objArrayOopDesc::object_size(length); | |
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1006 Klass* ak = array_klass(n, CHECK_NULL); |
0 | 1007 KlassHandle h_ak (THREAD, ak); |
1008 objArrayOop o = | |
1009 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
1010 return o; | |
1011 } | |
1012 | |
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1013 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
0 | 1014 if (TraceFinalizerRegistration) { |
1015 tty->print("Registered "); | |
1016 i->print_value_on(tty); | |
1017 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
1018 } | |
1019 instanceHandle h_i(THREAD, i); | |
1020 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
1021 JavaValue result(T_VOID); | |
1022 JavaCallArguments args(h_i); | |
1023 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
1024 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
1025 return h_i(); | |
1026 } | |
1027 | |
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1028 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
0 | 1029 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
1030 int size = size_helper(); // Query before forming handle. | |
1031 | |
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1032 KlassHandle h_k(THREAD, this); |
0 | 1033 |
1034 instanceOop i; | |
1035 | |
1036 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
1037 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
1038 i = register_finalizer(i, CHECK_NULL); | |
1039 } | |
1040 return i; | |
1041 } | |
1042 | |
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1043 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
0 | 1044 if (is_interface() || is_abstract()) { |
1045 ResourceMark rm(THREAD); | |
1046 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
1047 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
1048 } | |
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1049 if (this == SystemDictionary::Class_klass()) { |
0 | 1050 ResourceMark rm(THREAD); |
1051 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
1052 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
1053 } | |
1054 } | |
1055 | |
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1056 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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1057 instanceKlassHandle this_oop(THREAD, this); |
0 | 1058 return array_klass_impl(this_oop, or_null, n, THREAD); |
1059 } | |
1060 | |
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1061 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
0 | 1062 if (this_oop->array_klasses() == NULL) { |
1063 if (or_null) return NULL; | |
1064 | |
1065 ResourceMark rm; | |
1066 JavaThread *jt = (JavaThread *)THREAD; | |
1067 { | |
1068 // Atomic creation of array_klasses | |
1069 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
1070 MutexLocker ma(MultiArray_lock, THREAD); | |
1071 | |
1072 // Check if update has already taken place | |
1073 if (this_oop->array_klasses() == NULL) { | |
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1074 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
0 | 1075 this_oop->set_array_klasses(k); |
1076 } | |
1077 } | |
1078 } | |
1079 // _this will always be set at this point | |
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1080 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
0 | 1081 if (or_null) { |
1082 return oak->array_klass_or_null(n); | |
1083 } | |
1084 return oak->array_klass(n, CHECK_NULL); | |
1085 } | |
1086 | |
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1087 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
0 | 1088 return array_klass_impl(or_null, 1, THREAD); |
1089 } | |
1090 | |
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1091 void InstanceKlass::call_class_initializer(TRAPS) { |
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1092 instanceKlassHandle ik (THREAD, this); |
0 | 1093 call_class_initializer_impl(ik, THREAD); |
1094 } | |
1095 | |
1096 static int call_class_initializer_impl_counter = 0; // for debugging | |
1097 | |
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1098 Method* InstanceKlass::class_initializer() { |
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1099 Method* clinit = find_method( |
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1100 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1101 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1102 return clinit; |
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1103 } |
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1104 return NULL; |
0 | 1105 } |
1106 | |
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1107 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1108 if (ReplayCompiles && |
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1109 (ReplaySuppressInitializers == 1 || |
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1110 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1111 // Hide the existence of the initializer for the purpose of replaying the compile |
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1112 return; |
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1113 } |
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1114 |
0 | 1115 methodHandle h_method(THREAD, this_oop->class_initializer()); |
1116 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
1117 if (TraceClassInitialization) { | |
1118 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
1119 this_oop->name()->print_value(); | |
1120 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
1121 } | |
1122 if (h_method() != NULL) { | |
1123 JavaCallArguments args; // No arguments | |
1124 JavaValue result(T_VOID); | |
1125 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
1126 } | |
1127 } | |
1128 | |
1129 | |
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1130 void InstanceKlass::mask_for(methodHandle method, int bci, |
0 | 1131 InterpreterOopMap* entry_for) { |
1132 // Dirty read, then double-check under a lock. | |
1133 if (_oop_map_cache == NULL) { | |
1134 // Otherwise, allocate a new one. | |
1135 MutexLocker x(OopMapCacheAlloc_lock); | |
1136 // First time use. Allocate a cache in C heap | |
1137 if (_oop_map_cache == NULL) { | |
1138 _oop_map_cache = new OopMapCache(); | |
1139 } | |
1140 } | |
1141 // _oop_map_cache is constant after init; lookup below does is own locking. | |
1142 _oop_map_cache->lookup(method, bci, entry_for); | |
1143 } | |
1144 | |
1145 | |
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1146 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1147 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1148 Symbol* f_name = fs.name(); |
1149 Symbol* f_sig = fs.signature(); | |
0 | 1150 if (f_name == name && f_sig == sig) { |
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1151 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1152 return true; |
1153 } | |
1154 } | |
1155 return false; | |
1156 } | |
1157 | |
1158 | |
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1159 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1160 const int n = local_interfaces()->length(); |
1161 for (int i = 0; i < n; i++) { | |
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1162 Klass* intf1 = local_interfaces()->at(i); |
6983 | 1163 assert(intf1->is_interface(), "just checking type"); |
0 | 1164 // search for field in current interface |
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1165 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
0 | 1166 assert(fd->is_static(), "interface field must be static"); |
1167 return intf1; | |
1168 } | |
1169 // search for field in direct superinterfaces | |
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1170 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
0 | 1171 if (intf2 != NULL) return intf2; |
1172 } | |
1173 // otherwise field lookup fails | |
1174 return NULL; | |
1175 } | |
1176 | |
1177 | |
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1178 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1179 // search order according to newest JVM spec (5.4.3.2, p.167). |
1180 // 1) search for field in current klass | |
1181 if (find_local_field(name, sig, fd)) { | |
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1182 return const_cast<InstanceKlass*>(this); |
0 | 1183 } |
1184 // 2) search for field recursively in direct superinterfaces | |
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1185 { Klass* intf = find_interface_field(name, sig, fd); |
0 | 1186 if (intf != NULL) return intf; |
1187 } | |
1188 // 3) apply field lookup recursively if superclass exists | |
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1189 { Klass* supr = super(); |
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1190 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
0 | 1191 } |
1192 // 4) otherwise field lookup fails | |
1193 return NULL; | |
1194 } | |
1195 | |
1196 | |
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1197 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
0 | 1198 // search order according to newest JVM spec (5.4.3.2, p.167). |
1199 // 1) search for field in current klass | |
1200 if (find_local_field(name, sig, fd)) { | |
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1201 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
0 | 1202 } |
1203 // 2) search for field recursively in direct superinterfaces | |
1204 if (is_static) { | |
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1205 Klass* intf = find_interface_field(name, sig, fd); |
0 | 1206 if (intf != NULL) return intf; |
1207 } | |
1208 // 3) apply field lookup recursively if superclass exists | |
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1209 { Klass* supr = super(); |
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1210 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
0 | 1211 } |
1212 // 4) otherwise field lookup fails | |
1213 return NULL; | |
1214 } | |
1215 | |
1216 | |
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1217 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1218 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1219 if (fs.offset() == offset) { |
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1220 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1221 if (fd->is_static() == is_static) return true; |
1222 } | |
1223 } | |
1224 return false; | |
1225 } | |
1226 | |
1227 | |
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1228 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1229 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1230 while (klass != NULL) { |
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1231 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
0 | 1232 return true; |
1233 } | |
6983 | 1234 klass = klass->super(); |
0 | 1235 } |
1236 return false; | |
1237 } | |
1238 | |
1239 | |
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1240 void InstanceKlass::methods_do(void f(Method* method)) { |
0 | 1241 int len = methods()->length(); |
1242 for (int index = 0; index < len; index++) { | |
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1243 Method* m = methods()->at(index); |
0 | 1244 assert(m->is_method(), "must be method"); |
1245 f(m); | |
1246 } | |
1247 } | |
1248 | |
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1249 |
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1250 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
3938 | 1251 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
1252 if (fs.access_flags().is_static()) { | |
1253 fieldDescriptor fd; | |
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1254 fd.initialize(this, fs.index()); |
3938 | 1255 cl->do_field(&fd); |
1256 } | |
0 | 1257 } |
1258 } | |
1259 | |
1260 | |
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1261 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1262 instanceKlassHandle h_this(THREAD, this); |
0 | 1263 do_local_static_fields_impl(h_this, f, CHECK); |
1264 } | |
1265 | |
1266 | |
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1267 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
3938 | 1268 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
1269 if (fs.access_flags().is_static()) { | |
1270 fieldDescriptor fd; | |
1271 fd.initialize(this_oop(), fs.index()); | |
1272 f(&fd, CHECK); | |
1273 } | |
0 | 1274 } |
1275 } | |
1276 | |
1277 | |
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1278 static int compare_fields_by_offset(int* a, int* b) { |
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1279 return a[0] - b[0]; |
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1280 } |
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1281 |
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1282 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1283 InstanceKlass* super = superklass(); |
0 | 1284 if (super != NULL) { |
1285 super->do_nonstatic_fields(cl); | |
1286 } | |
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1287 fieldDescriptor fd; |
3938 | 1288 int length = java_fields_count(); |
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1289 // In DebugInfo nonstatic fields are sorted by offset. |
6197 | 1290 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
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1291 int j = 0; |
3938 | 1292 for (int i = 0; i < length; i += 1) { |
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1293 fd.initialize(this, i); |
44
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1294 if (!fd.is_static()) { |
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1295 fields_sorted[j + 0] = fd.offset(); |
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1296 fields_sorted[j + 1] = i; |
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1297 j += 2; |
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1298 } |
0 | 1299 } |
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1300 if (j > 0) { |
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1301 length = j; |
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1302 // _sort_Fn is defined in growableArray.hpp. |
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1303 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1304 for (int i = 0; i < length; i += 2) { |
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1305 fd.initialize(this, fields_sorted[i + 1]); |
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1306 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1307 cl->do_field(&fd); |
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1308 } |
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1309 } |
6197 | 1310 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
0 | 1311 } |
1312 | |
1313 | |
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1314 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1315 if (array_klasses() != NULL) |
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1316 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1317 } |
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1318 |
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1319 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
0 | 1320 if (array_klasses() != NULL) |
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1321 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
0 | 1322 } |
1323 | |
1324 | |
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1325 void InstanceKlass::with_array_klasses_do(void f(Klass* k)) { |
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1326 f(this); |
0 | 1327 array_klasses_do(f); |
1328 } | |
1329 | |
1330 #ifdef ASSERT | |
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1331 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
0 | 1332 int len = methods->length(); |
1333 for (int index = 0; index < len; index++) { | |
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1334 Method* m = methods->at(index); |
0 | 1335 assert(m->is_method(), "must be method"); |
1336 if (m->signature() == signature && m->name() == name) { | |
1337 return index; | |
1338 } | |
1339 } | |
1340 return -1; | |
1341 } | |
1342 #endif | |
1343 | |
6934 | 1344 static int binary_search(Array<Method*>* methods, Symbol* name) { |
0 | 1345 int len = methods->length(); |
1346 // methods are sorted, so do binary search | |
1347 int l = 0; | |
1348 int h = len - 1; | |
1349 while (l <= h) { | |
1350 int mid = (l + h) >> 1; | |
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1351 Method* m = methods->at(mid); |
0 | 1352 assert(m->is_method(), "must be method"); |
1353 int res = m->name()->fast_compare(name); | |
1354 if (res == 0) { | |
6934 | 1355 return mid; |
0 | 1356 } else if (res < 0) { |
1357 l = mid + 1; | |
1358 } else { | |
1359 h = mid - 1; | |
1360 } | |
1361 } | |
6934 | 1362 return -1; |
1363 } | |
1364 | |
1365 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
1366 return InstanceKlass::find_method(methods(), name, signature); | |
1367 } | |
1368 | |
1369 Method* InstanceKlass::find_method( | |
1370 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
1371 int hit = binary_search(methods, name); | |
1372 if (hit != -1) { | |
1373 Method* m = methods->at(hit); | |
1374 // Do linear search to find matching signature. First, quick check | |
1375 // for common case | |
1376 if (m->signature() == signature) return m; | |
1377 // search downwards through overloaded methods | |
1378 int i; | |
1379 for (i = hit - 1; i >= 0; --i) { | |
1380 Method* m = methods->at(i); | |
1381 assert(m->is_method(), "must be method"); | |
1382 if (m->name() != name) break; | |
1383 if (m->signature() == signature) return m; | |
1384 } | |
1385 // search upwards | |
1386 for (i = hit + 1; i < methods->length(); ++i) { | |
1387 Method* m = methods->at(i); | |
1388 assert(m->is_method(), "must be method"); | |
1389 if (m->name() != name) break; | |
1390 if (m->signature() == signature) return m; | |
1391 } | |
1392 // not found | |
0 | 1393 #ifdef ASSERT |
6934 | 1394 int index = linear_search(methods, name, signature); |
1395 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
0 | 1396 #endif |
6934 | 1397 } |
0 | 1398 return NULL; |
1399 } | |
1400 | |
6934 | 1401 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
1402 return find_method_by_name(methods(), name, end); | |
1403 } | |
1404 | |
1405 int InstanceKlass::find_method_by_name( | |
1406 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
1407 assert(end_ptr != NULL, "just checking"); | |
1408 int start = binary_search(methods, name); | |
1409 int end = start + 1; | |
1410 if (start != -1) { | |
1411 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
1412 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
1413 *end_ptr = end; | |
1414 return start; | |
1415 } | |
1416 return -1; | |
1417 } | |
1418 | |
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1419 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1420 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1421 while (klass != NULL) { |
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1422 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
0 | 1423 if (method != NULL) return method; |
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1424 klass = InstanceKlass::cast(klass)->super(); |
0 | 1425 } |
1426 return NULL; | |
1427 } | |
1428 | |
1429 // lookup a method in all the interfaces that this class implements | |
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1430 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
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1431 Symbol* signature) const { |
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1432 Array<Klass*>* all_ifs = transitive_interfaces(); |
0 | 1433 int num_ifs = all_ifs->length(); |
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1434 InstanceKlass *ik = NULL; |
0 | 1435 for (int i = 0; i < num_ifs; i++) { |
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1436 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1437 Method* m = ik->lookup_method(name, signature); |
0 | 1438 if (m != NULL) { |
1439 return m; | |
1440 } | |
1441 } | |
1442 return NULL; | |
1443 } | |
1444 | |
1445 /* jni_id_for_impl for jfieldIds only */ | |
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1446 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
0 | 1447 MutexLocker ml(JfieldIdCreation_lock); |
1448 // Retry lookup after we got the lock | |
1449 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
1450 if (probe == NULL) { | |
1451 // Slow case, allocate new static field identifier | |
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1452 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
0 | 1453 this_oop->set_jni_ids(probe); |
1454 } | |
1455 return probe; | |
1456 } | |
1457 | |
1458 | |
1459 /* jni_id_for for jfieldIds only */ | |
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1460 JNIid* InstanceKlass::jni_id_for(int offset) { |
0 | 1461 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
1462 if (probe == NULL) { | |
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1463 probe = jni_id_for_impl(this, offset); |
0 | 1464 } |
1465 return probe; | |
1466 } | |
1467 | |
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1468 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1469 Array<jushort>* inner_class_list = inner_classes(); |
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1470 if (inner_class_list == NULL) { |
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1471 return 0; |
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1472 } |
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1473 int length = inner_class_list->length(); |
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1474 if (length % inner_class_next_offset == 0) { |
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1475 return 0; |
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1476 } else { |
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1477 int index = length - enclosing_method_attribute_size; |
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1478 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1479 return inner_class_list->at(index + offset); |
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1480 } |
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1481 } |
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1482 |
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1483 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
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1484 u2 method_index) { |
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1485 Array<jushort>* inner_class_list = inner_classes(); |
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1486 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1487 int length = inner_class_list->length(); |
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1488 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1489 int index = length - enclosing_method_attribute_size; |
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1490 inner_class_list->at_put( |
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1491 index + enclosing_method_class_index_offset, class_index); |
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1492 inner_class_list->at_put( |
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1493 index + enclosing_method_method_index_offset, method_index); |
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1494 } |
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1495 } |
0 | 1496 |
1497 // Lookup or create a jmethodID. | |
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1498 // This code is called by the VMThread and JavaThreads so the |
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1499 // locking has to be done very carefully to avoid deadlocks |
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1500 // and/or other cache consistency problems. |
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1501 // |
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1502 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
0 | 1503 size_t idnum = (size_t)method_h->method_idnum(); |
1504 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
1505 size_t length = 0; | |
1506 jmethodID id = NULL; | |
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1507 |
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1508 // We use a double-check locking idiom here because this cache is |
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1509 // performance sensitive. In the normal system, this cache only |
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1510 // transitions from NULL to non-NULL which is safe because we use |
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1511 // release_set_methods_jmethod_ids() to advertise the new cache. |
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1512 // A partially constructed cache should never be seen by a racing |
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1513 // thread. We also use release_store_ptr() to save a new jmethodID |
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1514 // in the cache so a partially constructed jmethodID should never be |
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1515 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1516 // lock, but cache writes of a new jmethodID requires uniqueness and |
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1517 // creation of the cache itself requires no leaks so a lock is |
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1518 // generally acquired in those two cases. |
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1519 // |
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1520 // If the RedefineClasses() API has been used, then this cache can |
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1521 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1522 // Cache creation requires no leaks and we require safety between all |
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1523 // cache accesses and freeing of the old cache so a lock is generally |
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1524 // acquired when the RedefineClasses() API has been used. |
0 | 1525 |
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1526 if (jmeths != NULL) { |
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1527 // the cache already exists |
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1528 if (!ik_h->idnum_can_increment()) { |
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1529 // the cache can't grow so we can just get the current values |
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1530 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1531 } else { |
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1532 // cache can grow so we have to be more careful |
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1533 if (Threads::number_of_threads() == 0 || |
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1534 SafepointSynchronize::is_at_safepoint()) { |
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1535 // we're single threaded or at a safepoint - no locking needed |
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1536 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1537 } else { |
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1538 MutexLocker ml(JmethodIdCreation_lock); |
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1539 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1540 } |
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1541 } |
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1542 } |
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1543 // implied else: |
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1544 // we need to allocate a cache so default length and id values are good |
0 | 1545 |
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1546 if (jmeths == NULL || // no cache yet |
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1547 length <= idnum || // cache is too short |
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1548 id == NULL) { // cache doesn't contain entry |
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1549 |
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1550 // This function can be called by the VMThread so we have to do all |
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1551 // things that might block on a safepoint before grabbing the lock. |
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1552 // Otherwise, we can deadlock with the VMThread or have a cache |
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1553 // consistency issue. These vars keep track of what we might have |
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1554 // to free after the lock is dropped. |
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1555 jmethodID to_dealloc_id = NULL; |
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1556 jmethodID* to_dealloc_jmeths = NULL; |
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1557 |
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1558 // may not allocate new_jmeths or use it if we allocate it |
0 | 1559 jmethodID* new_jmeths = NULL; |
1560 if (length <= idnum) { | |
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1561 // allocate a new cache that might be used |
0 | 1562 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
6197 | 1563 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
0 | 1564 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
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1565 // cache size is stored in element[0], other elements offset by one |
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1566 new_jmeths[0] = (jmethodID)size; |
0 | 1567 } |
1568 | |
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1569 // allocate a new jmethodID that might be used |
0 | 1570 jmethodID new_id = NULL; |
1571 if (method_h->is_old() && !method_h->is_obsolete()) { | |
1572 // The method passed in is old (but not obsolete), we need to use the current version | |
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1573 Method* current_method = ik_h->method_with_idnum((int)idnum); |
0 | 1574 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
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1575 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
0 | 1576 } else { |
1577 // It is the current version of the method or an obsolete method, | |
1578 // use the version passed in | |
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1579 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
0 | 1580 } |
1581 | |
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1582 if (Threads::number_of_threads() == 0 || |
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1583 SafepointSynchronize::is_at_safepoint()) { |
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1584 // we're single threaded or at a safepoint - no locking needed |
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1585 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1586 &to_dealloc_id, &to_dealloc_jmeths); |
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1587 } else { |
0 | 1588 MutexLocker ml(JmethodIdCreation_lock); |
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1589 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1590 &to_dealloc_id, &to_dealloc_jmeths); |
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1591 } |
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1592 |
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1593 // The lock has been dropped so we can free resources. |
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1594 // Free up either the old cache or the new cache if we allocated one. |
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1595 if (to_dealloc_jmeths != NULL) { |
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1596 FreeHeap(to_dealloc_jmeths); |
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1597 } |
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1598 // free up the new ID since it wasn't needed |
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1599 if (to_dealloc_id != NULL) { |
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1600 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
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1601 } |
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1602 } |
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1603 return id; |
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1604 } |
0 | 1605 |
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1606 |
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1607 // Common code to fetch the jmethodID from the cache or update the |
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1608 // cache with the new jmethodID. This function should never do anything |
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1609 // that causes the caller to go to a safepoint or we can deadlock with |
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1610 // the VMThread or have cache consistency issues. |
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1611 // |
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1612 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
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1613 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
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1614 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
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1615 jmethodID** to_dealloc_jmeths_p) { |
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1616 assert(new_id != NULL, "sanity check"); |
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1617 assert(to_dealloc_id_p != NULL, "sanity check"); |
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1618 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
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1619 assert(Threads::number_of_threads() == 0 || |
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1620 SafepointSynchronize::is_at_safepoint() || |
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1621 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
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1622 |
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1623 // reacquire the cache - we are locked, single threaded or at a safepoint |
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1624 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
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1625 jmethodID id = NULL; |
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1626 size_t length = 0; |
0 | 1627 |
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1628 if (jmeths == NULL || // no cache yet |
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1629 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
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1630 if (jmeths != NULL) { |
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1631 // copy any existing entries from the old cache |
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1632 for (size_t index = 0; index < length; index++) { |
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1633 new_jmeths[index+1] = jmeths[index+1]; |
0 | 1634 } |
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1635 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
0 | 1636 } |
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1637 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
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1638 } else { |
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1639 // fetch jmethodID (if any) from the existing cache |
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1640 id = jmeths[idnum+1]; |
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1641 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
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1642 } |
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1643 if (id == NULL) { |
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1644 // No matching jmethodID in the existing cache or we have a new |
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1645 // cache or we just grew the cache. This cache write is done here |
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1646 // by the first thread to win the foot race because a jmethodID |
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1647 // needs to be unique once it is generally available. |
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1648 id = new_id; |
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1649 |
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1650 // The jmethodID cache can be read while unlocked so we have to |
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|
1651 // make sure the new jmethodID is complete before installing it |
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1652 // in the cache. |
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1653 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
49
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1654 } else { |
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1655 *to_dealloc_id_p = new_id; // save new id for later delete |
0 | 1656 } |
1657 return id; | |
1658 } | |
1659 | |
1660 | |
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1661 // Common code to get the jmethodID cache length and the jmethodID |
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1662 // value at index idnum if there is one. |
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1663 // |
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1664 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
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1665 size_t idnum, size_t *length_p, jmethodID* id_p) { |
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1666 assert(cache != NULL, "sanity check"); |
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1667 assert(length_p != NULL, "sanity check"); |
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1668 assert(id_p != NULL, "sanity check"); |
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1669 |
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1670 // cache size is stored in element[0], other elements offset by one |
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1671 *length_p = (size_t)cache[0]; |
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1672 if (*length_p <= idnum) { // cache is too short |
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1673 *id_p = NULL; |
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1674 } else { |
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1675 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1676 } |
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1677 } |
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1678 |
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1679 |
0 | 1680 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
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1681 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
0 | 1682 size_t idnum = (size_t)method->method_idnum(); |
1683 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
1684 size_t length; // length assigned as debugging crumb | |
1685 jmethodID id = NULL; | |
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1686 if (jmeths != NULL && // If there is a cache |
0 | 1687 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
1688 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
1689 } | |
1690 return id; | |
1691 } | |
1692 | |
1693 | |
1694 // Cache an itable index | |
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1695 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
0 | 1696 int* indices = methods_cached_itable_indices_acquire(); |
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1697 int* to_dealloc_indices = NULL; |
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1698 |
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1699 // We use a double-check locking idiom here because this cache is |
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1700 // performance sensitive. In the normal system, this cache only |
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1701 // transitions from NULL to non-NULL which is safe because we use |
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1702 // release_set_methods_cached_itable_indices() to advertise the |
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1703 // new cache. A partially constructed cache should never be seen |
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1704 // by a racing thread. Cache reads and writes proceed without a |
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1705 // lock, but creation of the cache itself requires no leaks so a |
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1706 // lock is generally acquired in that case. |
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1707 // |
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1708 // If the RedefineClasses() API has been used, then this cache can |
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1709 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1710 // Cache creation requires no leaks and we require safety between all |
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1711 // cache accesses and freeing of the old cache so a lock is generally |
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1712 // acquired when the RedefineClasses() API has been used. |
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1713 |
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1714 if (indices == NULL || idnum_can_increment()) { |
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1715 // we need a cache or the cache can grow |
0 | 1716 MutexLocker ml(JNICachedItableIndex_lock); |
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1717 // reacquire the cache to see if another thread already did the work |
0 | 1718 indices = methods_cached_itable_indices_acquire(); |
1719 size_t length = 0; | |
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1720 // cache size is stored in element[0], other elements offset by one |
0 | 1721 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
1722 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
6197 | 1723 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
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1724 new_indices[0] = (int)size; |
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1725 // copy any existing entries |
0 | 1726 size_t i; |
1727 for (i = 0; i < length; i++) { | |
1728 new_indices[i+1] = indices[i+1]; | |
1729 } | |
1730 // Set all the rest to -1 | |
1731 for (i = length; i < size; i++) { | |
1732 new_indices[i+1] = -1; | |
1733 } | |
1734 if (indices != NULL) { | |
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1735 // We have an old cache to delete so save it for after we |
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1736 // drop the lock. |
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1737 to_dealloc_indices = indices; |
0 | 1738 } |
1739 release_set_methods_cached_itable_indices(indices = new_indices); | |
1740 } | |
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1741 |
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1742 if (idnum_can_increment()) { |
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1743 // this cache can grow so we have to write to it safely |
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1744 indices[idnum+1] = index; |
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1745 } |
0 | 1746 } else { |
1747 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1748 } | |
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1749 |
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1750 if (!idnum_can_increment()) { |
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1751 // The cache cannot grow and this JNI itable index value does not |
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1752 // have to be unique like a jmethodID. If there is a race to set it, |
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1753 // it doesn't matter. |
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1754 indices[idnum+1] = index; |
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1755 } |
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1756 |
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1757 if (to_dealloc_indices != NULL) { |
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1758 // we allocated a new cache so free the old one |
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1759 FreeHeap(to_dealloc_indices); |
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1760 } |
0 | 1761 } |
1762 | |
1763 | |
1764 // Retrieve a cached itable index | |
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1765 int InstanceKlass::cached_itable_index(size_t idnum) { |
0 | 1766 int* indices = methods_cached_itable_indices_acquire(); |
1767 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
1768 // indices exist and are long enough, retrieve possible cached | |
1769 return indices[idnum+1]; | |
1770 } | |
1771 return -1; | |
1772 } | |
1773 | |
1774 | |
1775 // | |
1776 // Walk the list of dependent nmethods searching for nmethods which | |
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1777 // are dependent on the changes that were passed in and mark them for |
0 | 1778 // deoptimization. Returns the number of nmethods found. |
1779 // | |
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1780 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
0 | 1781 assert_locked_or_safepoint(CodeCache_lock); |
1782 int found = 0; | |
1783 nmethodBucket* b = _dependencies; | |
1784 while (b != NULL) { | |
1785 nmethod* nm = b->get_nmethod(); | |
1786 // since dependencies aren't removed until an nmethod becomes a zombie, | |
1787 // the dependency list may contain nmethods which aren't alive. | |
1788 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
1789 if (TraceDependencies) { | |
1790 ResourceMark rm; | |
1791 tty->print_cr("Marked for deoptimization"); | |
1792 tty->print_cr(" context = %s", this->external_name()); | |
1793 changes.print(); | |
1794 nm->print(); | |
1795 nm->print_dependencies(); | |
1796 } | |
1797 nm->mark_for_deoptimization(); | |
1798 found++; | |
1799 } | |
1800 b = b->next(); | |
1801 } | |
1802 return found; | |
1803 } | |
1804 | |
1805 | |
1806 // | |
1807 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
1808 // It's possible that an nmethod has multiple dependencies on this klass | |
1809 // so a count is kept for each bucket to guarantee that creation and | |
1810 // deletion of dependencies is consistent. | |
1811 // | |
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1812 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
0 | 1813 assert_locked_or_safepoint(CodeCache_lock); |
1814 nmethodBucket* b = _dependencies; | |
1815 nmethodBucket* last = NULL; | |
1816 while (b != NULL) { | |
1817 if (nm == b->get_nmethod()) { | |
1818 b->increment(); | |
1819 return; | |
1820 } | |
1821 b = b->next(); | |
1822 } | |
1823 _dependencies = new nmethodBucket(nm, _dependencies); | |
1824 } | |
1825 | |
1826 | |
1827 // | |
1828 // Decrement count of the nmethod in the dependency list and remove | |
1829 // the bucket competely when the count goes to 0. This method must | |
1830 // find a corresponding bucket otherwise there's a bug in the | |
1831 // recording of dependecies. | |
1832 // | |
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1833 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
0 | 1834 assert_locked_or_safepoint(CodeCache_lock); |
1835 nmethodBucket* b = _dependencies; | |
1836 nmethodBucket* last = NULL; | |
1837 while (b != NULL) { | |
1838 if (nm == b->get_nmethod()) { | |
1839 if (b->decrement() == 0) { | |
1840 if (last == NULL) { | |
1841 _dependencies = b->next(); | |
1842 } else { | |
1843 last->set_next(b->next()); | |
1844 } | |
1845 delete b; | |
1846 } | |
1847 return; | |
1848 } | |
1849 last = b; | |
1850 b = b->next(); | |
1851 } | |
1852 #ifdef ASSERT | |
1853 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
1854 nm->print(); | |
1855 #endif // ASSERT | |
1856 ShouldNotReachHere(); | |
1857 } | |
1858 | |
1859 | |
1860 #ifndef PRODUCT | |
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1861 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
0 | 1862 nmethodBucket* b = _dependencies; |
1863 int idx = 0; | |
1864 while (b != NULL) { | |
1865 nmethod* nm = b->get_nmethod(); | |
1866 tty->print("[%d] count=%d { ", idx++, b->count()); | |
1867 if (!verbose) { | |
1868 nm->print_on(tty, "nmethod"); | |
1869 tty->print_cr(" } "); | |
1870 } else { | |
1871 nm->print(); | |
1872 nm->print_dependencies(); | |
1873 tty->print_cr("--- } "); | |
1874 } | |
1875 b = b->next(); | |
1876 } | |
1877 } | |
1878 | |
1879 | |
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1880 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
0 | 1881 nmethodBucket* b = _dependencies; |
1882 while (b != NULL) { | |
1883 if (nm == b->get_nmethod()) { | |
1884 return true; | |
1885 } | |
1886 b = b->next(); | |
1887 } | |
1888 return false; | |
1889 } | |
1890 #endif //PRODUCT | |
1891 | |
1892 | |
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1893 // Garbage collection |
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1894 |
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1895 #ifdef ASSERT |
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1896 template <class T> void assert_is_in(T *p) { |
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1897 T heap_oop = oopDesc::load_heap_oop(p); |
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1898 if (!oopDesc::is_null(heap_oop)) { |
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1899 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1900 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1901 } |
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1902 } |
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1903 template <class T> void assert_is_in_closed_subset(T *p) { |
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1904 T heap_oop = oopDesc::load_heap_oop(p); |
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1905 if (!oopDesc::is_null(heap_oop)) { |
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1906 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1907 assert(Universe::heap()->is_in_closed_subset(o), |
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1908 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
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1909 } |
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1910 } |
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1911 template <class T> void assert_is_in_reserved(T *p) { |
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1912 T heap_oop = oopDesc::load_heap_oop(p); |
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1913 if (!oopDesc::is_null(heap_oop)) { |
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1914 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1915 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1916 } |
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1917 } |
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1918 template <class T> void assert_nothing(T *p) {} |
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1919 |
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1920 #else |
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1921 template <class T> void assert_is_in(T *p) {} |
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1922 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1923 template <class T> void assert_is_in_reserved(T *p) {} |
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1924 template <class T> void assert_nothing(T *p) {} |
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1925 #endif // ASSERT |
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1926 |
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1927 // |
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1928 // Macros that iterate over areas of oops which are specialized on type of |
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1929 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1930 // |
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1931 // Parameters are: |
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1932 // T - type of oop to point to (either oop or narrowOop) |
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1933 // start_p - starting pointer for region to iterate over |
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1934 // count - number of oops or narrowOops to iterate over |
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1935 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1936 // makes it more efficient to put in a macro rather than making |
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1937 // it a template function) |
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1938 // assert_fn - assert function which is template function because performance |
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1939 // doesn't matter when enabled. |
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1940 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1941 T, start_p, count, do_oop, \ |
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1942 assert_fn) \ |
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1943 { \ |
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1944 T* p = (T*)(start_p); \ |
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1945 T* const end = p + (count); \ |
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1946 while (p < end) { \ |
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1947 (assert_fn)(p); \ |
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1948 do_oop; \ |
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1949 ++p; \ |
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1950 } \ |
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1951 } |
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1952 |
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1953 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1954 T, start_p, count, do_oop, \ |
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1955 assert_fn) \ |
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1956 { \ |
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1957 T* const start = (T*)(start_p); \ |
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1958 T* p = start + (count); \ |
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1959 while (start < p) { \ |
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1960 --p; \ |
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1961 (assert_fn)(p); \ |
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1962 do_oop; \ |
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1963 } \ |
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1964 } |
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1965 |
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1966 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1967 T, start_p, count, low, high, \ |
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1968 do_oop, assert_fn) \ |
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1969 { \ |
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1970 T* const l = (T*)(low); \ |
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1971 T* const h = (T*)(high); \ |
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1972 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1973 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1974 "bounded region must be properly aligned"); \ |
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1975 T* p = (T*)(start_p); \ |
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1976 T* end = p + (count); \ |
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1977 if (p < l) p = l; \ |
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1978 if (end > h) end = h; \ |
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1979 while (p < end) { \ |
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1980 (assert_fn)(p); \ |
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1981 do_oop; \ |
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1982 ++p; \ |
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1983 } \ |
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1984 } |
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1985 |
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1986 |
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1987 // The following macros call specialized macros, passing either oop or |
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1988 // narrowOop as the specialization type. These test the UseCompressedOops |
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1989 // flag. |
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1990 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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1991 { \ |
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1992 /* Compute oopmap block range. The common case \ |
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1993 is nonstatic_oop_map_size == 1. */ \ |
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1994 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 1995 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
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1996 if (UseCompressedOops) { \ |
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1997 while (map < end_map) { \ |
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1998 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
938 | 1999 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2000 do_oop, assert_fn) \ |
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2001 ++map; \ |
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2002 } \ |
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2003 } else { \ |
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2004 while (map < end_map) { \ |
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2005 InstanceKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
938 | 2006 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2007 do_oop, assert_fn) \ |
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2008 ++map; \ |
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2009 } \ |
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2010 } \ |
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2011 } |
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2012 |
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2013 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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2014 { \ |
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2015 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
938 | 2016 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
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2017 if (UseCompressedOops) { \ |
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2018 while (start_map < map) { \ |
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2019 --map; \ |
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2020 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
938 | 2021 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
113
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2022 do_oop, assert_fn) \ |
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2023 } \ |
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2024 } else { \ |
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2025 while (start_map < map) { \ |
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2026 --map; \ |
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2027 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
938 | 2028 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2029 do_oop, assert_fn) \ |
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2030 } \ |
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2031 } \ |
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2032 } |
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2033 |
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2034 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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2035 assert_fn) \ |
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2036 { \ |
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2037 /* Compute oopmap block range. The common case is \ |
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2038 nonstatic_oop_map_size == 1, so we accept the \ |
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2039 usually non-existent extra overhead of examining \ |
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2040 all the maps. */ \ |
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2041 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 2042 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
113
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2043 if (UseCompressedOops) { \ |
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2044 while (map < end_map) { \ |
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2045 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
938 | 2046 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2047 low, high, \ |
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2048 do_oop, assert_fn) \ |
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2049 ++map; \ |
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2050 } \ |
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2051 } else { \ |
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2052 while (map < end_map) { \ |
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2053 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
938 | 2054 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
113
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2055 low, high, \ |
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2056 do_oop, assert_fn) \ |
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2057 ++map; \ |
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2058 } \ |
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2059 } \ |
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2060 } |
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2061 |
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2062 void InstanceKlass::oop_follow_contents(oop obj) { |
113
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2063 assert(obj != NULL, "can't follow the content of NULL object"); |
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2064 MarkSweep::follow_klass(obj->klass()); |
113
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2065 InstanceKlass_OOP_MAP_ITERATE( \ |
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2066 obj, \ |
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2067 MarkSweep::mark_and_push(p), \ |
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2068 assert_is_in_closed_subset) |
0 | 2069 } |
2070 | |
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2071 #if INCLUDE_ALL_GCS |
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2072 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
0 | 2073 oop obj) { |
113
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2074 assert(obj != NULL, "can't follow the content of NULL object"); |
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2075 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2076 // Only mark the header and let the scan of the meta-data mark |
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2077 // everything else. |
113
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2078 InstanceKlass_OOP_MAP_ITERATE( \ |
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2079 obj, \ |
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2080 PSParallelCompact::mark_and_push(cm, p), \ |
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2081 assert_is_in) |
0 | 2082 } |
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2083 #endif // INCLUDE_ALL_GCS |
0 | 2084 |
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2085 // closure's do_metadata() method dictates whether the given closure should be |
0 | 2086 // applied to the klass ptr in the object header. |
2087 | |
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2088 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2089 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2090 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2091 "Inconsistency in do_metadata"); \ |
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2092 if (closure->do_metadata##nv_suffix()) |
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2093 |
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2094 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
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2095 \ |
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2096 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
113
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2097 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2098 /* header */ \ |
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2099 if_do_metadata_checked(closure, nv_suffix) { \ |
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2100 closure->do_klass##nv_suffix(obj->klass()); \ |
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2101 } \ |
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2102 InstanceKlass_OOP_MAP_ITERATE( \ |
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2103 obj, \ |
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2104 SpecializationStats:: \ |
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2105 record_do_oop_call##nv_suffix(SpecializationStats::ik); \ |
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2106 (closure)->do_oop##nv_suffix(p), \ |
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2107 assert_is_in_closed_subset) \ |
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2108 return size_helper(); \ |
0 | 2109 } |
2110 | |
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2111 #if INCLUDE_ALL_GCS |
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2112 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2113 \ |
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2114 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
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2115 OopClosureType* closure) { \ |
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2116 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2117 /* header */ \ |
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2118 if_do_metadata_checked(closure, nv_suffix) { \ |
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2119 closure->do_klass##nv_suffix(obj->klass()); \ |
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2120 } \ |
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2121 /* instance variables */ \ |
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2122 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2123 obj, \ |
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2124 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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2125 (closure)->do_oop##nv_suffix(p), \ |
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2126 assert_is_in_closed_subset) \ |
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2127 return size_helper(); \ |
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2128 } |
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2129 #endif // INCLUDE_ALL_GCS |
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2130 |
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2131 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2132 \ |
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2133 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
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2134 OopClosureType* closure, \ |
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2135 MemRegion mr) { \ |
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2136 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2137 if_do_metadata_checked(closure, nv_suffix) { \ |
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2138 if (mr.contains(obj)) { \ |
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2139 closure->do_klass##nv_suffix(obj->klass()); \ |
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2140 } \ |
113
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2141 } \ |
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2142 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2143 obj, mr.start(), mr.end(), \ |
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2144 (closure)->do_oop##nv_suffix(p), \ |
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2145 assert_is_in_closed_subset) \ |
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2146 return size_helper(); \ |
0 | 2147 } |
2148 | |
2149 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
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2150 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
0 | 2151 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
342
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2152 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2153 #if INCLUDE_ALL_GCS |
342
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2154 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2155 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2156 #endif // INCLUDE_ALL_GCS |
0 | 2157 |
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2158 int InstanceKlass::oop_adjust_pointers(oop obj) { |
0 | 2159 int size = size_helper(); |
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2160 InstanceKlass_OOP_MAP_ITERATE( \ |
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2161 obj, \ |
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2162 MarkSweep::adjust_pointer(p), \ |
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2163 assert_is_in) |
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2164 MarkSweep::adjust_klass(obj->klass()); |
0 | 2165 return size; |
2166 } | |
2167 | |
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2168 #if INCLUDE_ALL_GCS |
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2169 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
113
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2170 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2171 obj, \ |
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2172 if (PSScavenge::should_scavenge(p)) { \ |
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2173 pm->claim_or_forward_depth(p); \ |
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2174 }, \ |
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2175 assert_nothing ) |
0 | 2176 } |
2177 | |
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2178 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
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2179 int size = size_helper(); |
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2180 InstanceKlass_OOP_MAP_ITERATE( \ |
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2181 obj, \ |
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2182 PSParallelCompact::adjust_pointer(p), \ |
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2183 assert_is_in) |
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2184 obj->update_header(cm); |
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2185 return size; |
0 | 2186 } |
2187 | |
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2188 #endif // INCLUDE_ALL_GCS |
0 | 2189 |
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2190 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
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2191 assert(is_loader_alive(is_alive), "this klass should be live"); |
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2192 if (is_interface()) { |
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2193 if (ClassUnloading) { |
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2194 Klass* impl = implementor(); |
5998
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2195 if (impl != NULL) { |
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2196 if (!impl->is_loader_alive(is_alive)) { |
5998
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2197 // remove this guy |
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2198 Klass** klass = adr_implementor(); |
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2199 assert(klass != NULL, "null klass"); |
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2200 if (klass != NULL) { |
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2201 *klass = NULL; |
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2202 } |
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2203 } |
0 | 2204 } |
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2205 } |
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2206 } |
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2207 } |
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2208 |
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2209 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
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2210 for (int m = 0; m < methods()->length(); m++) { |
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2211 MethodData* mdo = methods()->at(m)->method_data(); |
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2212 if (mdo != NULL) { |
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2213 for (ProfileData* data = mdo->first_data(); |
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2214 mdo->is_valid(data); |
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2215 data = mdo->next_data(data)) { |
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2216 data->clean_weak_klass_links(is_alive); |
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2217 } |
0 | 2218 } |
2219 } | |
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2220 } |
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2221 |
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2222 |
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2223 static void remove_unshareable_in_class(Klass* k) { |
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2224 // remove klass's unshareable info |
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2225 k->remove_unshareable_info(); |
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2226 } |
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2227 |
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2228 void InstanceKlass::remove_unshareable_info() { |
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2229 Klass::remove_unshareable_info(); |
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2230 // Unlink the class |
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2231 if (is_linked()) { |
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2232 unlink_class(); |
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2233 } |
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2234 init_implementor(); |
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2235 |
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2236 constants()->remove_unshareable_info(); |
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2237 |
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2238 for (int i = 0; i < methods()->length(); i++) { |
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2239 Method* m = methods()->at(i); |
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2240 m->remove_unshareable_info(); |
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2241 } |
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2242 |
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2243 // do array classes also. |
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2244 array_klasses_do(remove_unshareable_in_class); |
0 | 2245 } |
2246 | |
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2247 void restore_unshareable_in_class(Klass* k, TRAPS) { |
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2248 k->restore_unshareable_info(CHECK); |
0 | 2249 } |
2250 | |
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2251 void InstanceKlass::restore_unshareable_info(TRAPS) { |
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2252 Klass::restore_unshareable_info(CHECK); |
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2253 instanceKlassHandle ik(THREAD, this); |
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2254 |
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2255 Array<Method*>* methods = ik->methods(); |
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2256 int num_methods = methods->length(); |
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2257 for (int index2 = 0; index2 < num_methods; ++index2) { |
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2258 methodHandle m(THREAD, methods->at(index2)); |
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2259 m()->link_method(m, CHECK); |
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2260 // restore method's vtable by calling a virtual function |
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2261 m->restore_vtable(); |
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2262 } |
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2263 if (JvmtiExport::has_redefined_a_class()) { |
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2264 // Reinitialize vtable because RedefineClasses may have changed some |
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2265 // entries in this vtable for super classes so the CDS vtable might |
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2266 // point to old or obsolete entries. RedefineClasses doesn't fix up |
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2267 // vtables in the shared system dictionary, only the main one. |
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2268 // It also redefines the itable too so fix that too. |
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2269 ResourceMark rm(THREAD); |
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2270 ik->vtable()->initialize_vtable(false, CHECK); |
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2271 ik->itable()->initialize_itable(false, CHECK); |
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2272 } |
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|
2273 |
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2274 // restore constant pool resolved references |
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2275 ik->constants()->restore_unshareable_info(CHECK); |
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2276 |
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2277 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
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2278 } |
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2279 |
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2280 static void clear_all_breakpoints(Method* m) { |
0 | 2281 m->clear_all_breakpoints(); |
2282 } | |
2283 | |
10149
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2284 |
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2285 void InstanceKlass::notify_unload_class(InstanceKlass* ik) { |
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2286 // notify the debugger |
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coleenp
parents:
10133
diff
changeset
|
2287 if (JvmtiExport::should_post_class_unload()) { |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2288 JvmtiExport::post_class_unload(ik); |
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 |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2291 // notify ClassLoadingService of class unload |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2292 ClassLoadingService::notify_class_unloaded(ik); |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2293 } |
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 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
|
2296 // Clean up C heap |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2297 ik->release_C_heap_structures(); |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2298 ik->constants()->release_C_heap_structures(); |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2299 } |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2300 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2301 void InstanceKlass::release_C_heap_structures() { |
10149
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2302 |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2303 // 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
|
2304 // 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
|
2305 // redefine classes. |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
10133
diff
changeset
|
2306 |
0 | 2307 // Deallocate oop map cache |
2308 if (_oop_map_cache != NULL) { | |
2309 delete _oop_map_cache; | |
2310 _oop_map_cache = NULL; | |
2311 } | |
2312 | |
2313 // Deallocate JNI identifiers for jfieldIDs | |
2314 JNIid::deallocate(jni_ids()); | |
2315 set_jni_ids(NULL); | |
2316 | |
2317 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
2318 if (jmeths != (jmethodID*)NULL) { | |
2319 release_set_methods_jmethod_ids(NULL); | |
2320 FreeHeap(jmeths); | |
2321 } | |
2322 | |
10347
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2323 // Deallocate MemberNameTable |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2324 { |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2325 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
|
2326 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
|
2327 MemberNameTable* mnt = member_names(); |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2328 if (mnt != NULL) { |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2329 delete mnt; |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2330 set_member_names(NULL); |
6c138b9851fb
8013945: CMS fatal error: must own lock MemberNameTable_lock
sspitsyn
parents:
10345
diff
changeset
|
2331 } |
10133
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
sspitsyn
parents:
9062
diff
changeset
|
2332 } |
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
sspitsyn
parents:
9062
diff
changeset
|
2333 |
0 | 2334 int* indices = methods_cached_itable_indices_acquire(); |
2335 if (indices != (int*)NULL) { | |
2336 release_set_methods_cached_itable_indices(NULL); | |
2337 FreeHeap(indices); | |
2338 } | |
2339 | |
2340 // release dependencies | |
2341 nmethodBucket* b = _dependencies; | |
2342 _dependencies = NULL; | |
2343 while (b != NULL) { | |
2344 nmethodBucket* next = b->next(); | |
2345 delete b; | |
2346 b = next; | |
2347 } | |
2348 | |
2349 // Deallocate breakpoint records | |
2350 if (breakpoints() != 0x0) { | |
2351 methods_do(clear_all_breakpoints); | |
2352 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
2353 } | |
2354 | |
2355 // deallocate information about previous versions | |
2356 if (_previous_versions != NULL) { | |
2357 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
2358 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
2359 delete pv_node; | |
2360 } | |
2361 delete _previous_versions; | |
2362 _previous_versions = NULL; | |
2363 } | |
2364 | |
2365 // deallocate the cached class file | |
2366 if (_cached_class_file_bytes != NULL) { | |
6197 | 2367 os::free(_cached_class_file_bytes, mtClass); |
0 | 2368 _cached_class_file_bytes = NULL; |
2369 _cached_class_file_len = 0; | |
2370 } | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2371 |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2372 // 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
|
2373 if (_name != NULL) _name->decrement_refcount(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2374 // 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
|
2375 // class can't be referenced anymore). |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2376 if (_array_name != NULL) _array_name->decrement_refcount(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2377 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
|
2378 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
|
2379 |
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7180
diff
changeset
|
2380 assert(_total_instanceKlass_count >= 1, "Sanity check"); |
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7180
diff
changeset
|
2381 Atomic::dec(&_total_instanceKlass_count); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2382 } |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2383 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2384 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
|
2385 _source_file_name = n; |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2386 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
|
2387 } |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2388 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2389 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
|
2390 if (array == NULL) { |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2391 _source_debug_extension = NULL; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2392 } else { |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2393 // 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
|
2394 // 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
|
2395 // 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
|
2396 // unlikely to happen. |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2397 assert((length+1) > length, "Overflow checking"); |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2398 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
|
2399 for (int i = 0; i < length; i++) { |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2400 sde[i] = array[i]; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2401 } |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2402 sde[length] = '\0'; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2403 _source_debug_extension = sde; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2404 } |
0 | 2405 } |
2406 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2407 address InstanceKlass::static_field_addr(int offset) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents:
6733
diff
changeset
|
2408 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
|
2409 } |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2410 |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2411 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2412 const char* InstanceKlass::signature_name() const { |
0 | 2413 const char* src = (const char*) (name()->as_C_string()); |
2414 const int src_length = (int)strlen(src); | |
2415 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
2416 int src_index = 0; | |
2417 int dest_index = 0; | |
2418 dest[dest_index++] = 'L'; | |
2419 while (src_index < src_length) { | |
2420 dest[dest_index++] = src[src_index++]; | |
2421 } | |
2422 dest[dest_index++] = ';'; | |
2423 dest[dest_index] = '\0'; | |
2424 return dest; | |
2425 } | |
2426 | |
2427 // different verisons of is_same_class_package | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2428 bool InstanceKlass::is_same_class_package(Klass* class2) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2429 Klass* class1 = this; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2430 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2431 Symbol* classname1 = class1->name(); |
2432 | |
2433 if (class2->oop_is_objArray()) { | |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents:
6735
diff
changeset
|
2434 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
0 | 2435 } |
2436 oop classloader2; | |
6983 | 2437 if (class2->oop_is_instance()) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2438 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
0 | 2439 } else { |
6983 | 2440 assert(class2->oop_is_typeArray(), "should be type array"); |
0 | 2441 classloader2 = NULL; |
2442 } | |
6983 | 2443 Symbol* classname2 = class2->name(); |
0 | 2444 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2445 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2446 classloader2, classname2); |
2447 } | |
2448 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2449 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
|
2450 Klass* class1 = this; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2451 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2452 Symbol* classname1 = class1->name(); |
0 | 2453 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2454 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2455 classloader2, classname2); |
2456 } | |
2457 | |
2458 // return true if two classes are in the same package, classloader | |
2459 // 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
|
2460 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
|
2461 oop class_loader2, Symbol* class_name2) { |
0 | 2462 if (class_loader1 != class_loader2) { |
2463 return false; | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2464 } else if (class_name1 == class_name2) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2465 return true; // skip painful bytewise comparison |
0 | 2466 } else { |
2467 ResourceMark rm; | |
2468 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2469 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
0 | 2470 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
2471 // 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
|
2472 const jbyte *name1 = class_name1->base(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2473 const jbyte *name2 = class_name2->base(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2474 |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2475 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
|
2476 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
0 | 2477 |
2478 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
2479 // One of the two doesn't have a package. Only return true | |
2480 // if the other one also doesn't have a package. | |
2481 return last_slash1 == last_slash2; | |
2482 } else { | |
2483 // Skip over '['s | |
2484 if (*name1 == '[') { | |
2485 do { | |
2486 name1++; | |
2487 } while (*name1 == '['); | |
2488 if (*name1 != 'L') { | |
2489 // Something is terribly wrong. Shouldn't be here. | |
2490 return false; | |
2491 } | |
2492 } | |
2493 if (*name2 == '[') { | |
2494 do { | |
2495 name2++; | |
2496 } while (*name2 == '['); | |
2497 if (*name2 != 'L') { | |
2498 // Something is terribly wrong. Shouldn't be here. | |
2499 return false; | |
2500 } | |
2501 } | |
2502 | |
2503 // Check that package part is identical | |
2504 int length1 = last_slash1 - name1; | |
2505 int length2 = last_slash2 - name2; | |
2506 | |
2507 return UTF8::equal(name1, length1, name2, length2); | |
2508 } | |
2509 } | |
2510 } | |
2511 | |
652
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2512 // Returns true iff super_method can be overridden by a method in targetclassname |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2513 // See JSL 3rd edition 8.4.6.1 |
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|
2514 // Assumes name-signature match |
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2515 // "this" is InstanceKlass of super_method which must exist |
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2516 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
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2517 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
652
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2518 // Private methods can not be overridden |
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2519 if (super_method->is_private()) { |
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2520 return false; |
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|
2521 } |
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|
2522 // If super method is accessible, then override |
4aaa9f5e02a8
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|
2523 if ((super_method->is_protected()) || |
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|
2524 (super_method->is_public())) { |
4aaa9f5e02a8
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|
2525 return true; |
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|
2526 } |
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|
2527 // Package-private methods are not inherited outside of package |
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|
2528 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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diff
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|
2529 return(is_same_class_package(targetclassloader(), targetclassname)); |
652
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|
2530 } |
0 | 2531 |
665
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2532 /* defined for now in jvm.cpp, for historical reasons *-- |
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2533 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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|
2534 Symbol*& simple_name_result, TRAPS) { |
665
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|
2535 ... |
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|
2536 } |
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|
2537 */ |
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|
2538 |
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|
2539 // tell if two classes have the same enclosing class (at package level) |
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2540 bool InstanceKlass::is_same_package_member_impl(instanceKlassHandle class1, |
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2541 Klass* class2_oop, TRAPS) { |
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2542 if (class2_oop == class1()) return true; |
6983 | 2543 if (!class2_oop->oop_is_instance()) return false; |
665
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2544 instanceKlassHandle class2(THREAD, class2_oop); |
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2545 |
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2546 // must be in same package before we try anything else |
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2547 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
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|
2548 return false; |
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|
2549 |
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|
2550 // As long as there is an outer1.getEnclosingClass, |
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|
2551 // shift the search outward. |
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|
2552 instanceKlassHandle outer1 = class1; |
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|
2553 for (;;) { |
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|
2554 // As we walk along, look for equalities between outer1 and class2. |
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2555 // Eventually, the walks will terminate as outer1 stops |
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|
2556 // at the top-level class around the original class. |
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|
2557 bool ignore_inner_is_member; |
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2558 Klass* next = outer1->compute_enclosing_class(&ignore_inner_is_member, |
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|
2559 CHECK_false); |
665
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|
2560 if (next == NULL) break; |
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|
2561 if (next == class2()) return true; |
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|
2562 outer1 = instanceKlassHandle(THREAD, next); |
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|
2563 } |
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|
2564 |
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|
2565 // Now do the same for class2. |
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|
2566 instanceKlassHandle outer2 = class2; |
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|
2567 for (;;) { |
1126
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|
2568 bool ignore_inner_is_member; |
6725
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2569 Klass* next = outer2->compute_enclosing_class(&ignore_inner_is_member, |
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|
2570 CHECK_false); |
665
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|
2571 if (next == NULL) break; |
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|
2572 // Might as well check the new outer against all available values. |
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|
2573 if (next == class1()) return true; |
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605
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|
2574 if (next == outer1()) return true; |
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|
2575 outer2 = instanceKlassHandle(THREAD, next); |
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jrose
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|
2576 } |
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|
2577 |
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|
2578 // If by this point we have not found an equality between the |
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|
2579 // two classes, we know they are in separate package members. |
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diff
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|
2580 return false; |
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605
diff
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|
2581 } |
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|
2582 |
0 | 2583 |
6725
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|
2584 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
0 | 2585 jint access = access_flags().as_int(); |
2586 | |
2587 // But check if it happens to be member class. | |
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2588 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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|
2589 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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|
2590 for (; !iter.done(); iter.next()) { |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2591 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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|
2592 // 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
changeset
|
2593 // 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
changeset
|
2594 if (ioff == 0) continue; |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2595 |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2596 // 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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|
2597 // 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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|
2598 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
diff
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|
2599 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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|
2600 // This is really a member class. |
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jiangli
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4739
diff
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|
2601 access = iter.inner_access_flags(); |
f7c4174b33ba
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jiangli
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4739
diff
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|
2602 break; |
0 | 2603 } |
2604 } | |
2605 // Remember to strip ACC_SUPER bit | |
2606 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
2607 } | |
2608 | |
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2609 jint InstanceKlass::jvmti_class_status() const { |
0 | 2610 jint result = 0; |
2611 | |
2612 if (is_linked()) { | |
2613 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
2614 } | |
2615 | |
2616 if (is_initialized()) { | |
2617 assert(is_linked(), "Class status is not consistent"); | |
2618 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
2619 } | |
2620 if (is_in_error_state()) { | |
2621 result |= JVMTI_CLASS_STATUS_ERROR; | |
2622 } | |
2623 return result; | |
2624 } | |
2625 | |
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2626 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
0 | 2627 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
2628 int method_table_offset_in_words = ioe->offset()/wordSize; | |
2629 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
2630 / itableOffsetEntry::size(); | |
2631 | |
2632 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
605 | 2633 // If the interface isn't implemented by the receiver class, |
0 | 2634 // the VM should throw IncompatibleClassChangeError. |
2635 if (cnt >= nof_interfaces) { | |
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2636 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
0 | 2637 } |
2638 | |
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|
2639 Klass* ik = ioe->interface_klass(); |
0 | 2640 if (ik == holder) break; |
2641 } | |
2642 | |
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2643 itableMethodEntry* ime = ioe->first_method_entry(this); |
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2644 Method* m = ime[index].method(); |
0 | 2645 if (m == NULL) { |
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|
2646 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
0 | 2647 } |
2648 return m; | |
2649 } | |
2650 | |
2651 // On-stack replacement stuff | |
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2652 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
0 | 2653 // only one compilation can be active |
2654 NEEDS_CLEANUP | |
2655 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
2656 OsrList_lock->lock_without_safepoint_check(); | |
2657 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
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|
2658 n->set_osr_link(osr_nmethods_head()); |
0 | 2659 set_osr_nmethods_head(n); |
1783 | 2660 // Raise the highest osr level if necessary |
2661 if (TieredCompilation) { | |
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2662 Method* m = n->method(); |
1783 | 2663 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
2664 } | |
0 | 2665 // Remember to unlock again |
2666 OsrList_lock->unlock(); | |
1783 | 2667 |
2668 // Get rid of the osr methods for the same bci that have lower levels. | |
2669 if (TieredCompilation) { | |
2670 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
2671 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
2672 if (inv != NULL && inv->is_in_use()) { | |
2673 inv->make_not_entrant(); | |
2674 } | |
2675 } | |
2676 } | |
0 | 2677 } |
2678 | |
2679 | |
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2680 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
0 | 2681 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2682 OsrList_lock->lock_without_safepoint_check(); | |
2683 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
2684 nmethod* last = NULL; | |
2685 nmethod* cur = osr_nmethods_head(); | |
1783 | 2686 int max_level = CompLevel_none; // Find the max comp level excluding n |
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|
2687 Method* m = n->method(); |
0 | 2688 // Search for match |
2689 while(cur != NULL && cur != n) { | |
1783 | 2690 if (TieredCompilation) { |
2691 // Find max level before n | |
2692 max_level = MAX2(max_level, cur->comp_level()); | |
2693 } | |
0 | 2694 last = cur; |
989
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|
2695 cur = cur->osr_link(); |
0 | 2696 } |
1783 | 2697 nmethod* next = NULL; |
0 | 2698 if (cur == n) { |
1783 | 2699 next = cur->osr_link(); |
0 | 2700 if (last == NULL) { |
2701 // Remove first element | |
1783 | 2702 set_osr_nmethods_head(next); |
0 | 2703 } else { |
1783 | 2704 last->set_osr_link(next); |
0 | 2705 } |
2706 } | |
989
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|
2707 n->set_osr_link(NULL); |
1783 | 2708 if (TieredCompilation) { |
2709 cur = next; | |
2710 while (cur != NULL) { | |
2711 // Find max level after n | |
2712 max_level = MAX2(max_level, cur->comp_level()); | |
2713 cur = cur->osr_link(); | |
2714 } | |
2715 m->set_highest_osr_comp_level(max_level); | |
2716 } | |
0 | 2717 // Remember to unlock again |
2718 OsrList_lock->unlock(); | |
2719 } | |
2720 | |
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2721 nmethod* InstanceKlass::lookup_osr_nmethod(const Method* m, int bci, int comp_level, bool match_level) const { |
0 | 2722 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2723 OsrList_lock->lock_without_safepoint_check(); | |
2724 nmethod* osr = osr_nmethods_head(); | |
1783 | 2725 nmethod* best = NULL; |
0 | 2726 while (osr != NULL) { |
2727 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
1783 | 2728 // There can be a time when a c1 osr method exists but we are waiting |
2729 // for a c2 version. When c2 completes its osr nmethod we will trash | |
2730 // the c1 version and only be able to find the c2 version. However | |
2731 // while we overflow in the c1 code at back branches we don't want to | |
2732 // try and switch to the same code as we are already running | |
2733 | |
0 | 2734 if (osr->method() == m && |
2735 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
1783 | 2736 if (match_level) { |
2737 if (osr->comp_level() == comp_level) { | |
2738 // Found a match - return it. | |
2739 OsrList_lock->unlock(); | |
2740 return osr; | |
2741 } | |
2742 } else { | |
2743 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
2744 if (osr->comp_level() == CompLevel_highest_tier) { | |
2745 // Found the best possible - return it. | |
2746 OsrList_lock->unlock(); | |
2747 return osr; | |
2748 } | |
2749 best = osr; | |
2750 } | |
2751 } | |
0 | 2752 } |
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2753 osr = osr->osr_link(); |
0 | 2754 } |
2755 OsrList_lock->unlock(); | |
1783 | 2756 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
2757 return best; | |
2758 } | |
0 | 2759 return NULL; |
2760 } | |
2761 | |
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2762 void InstanceKlass::add_member_name(int index, Handle mem_name) { |
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2763 jweak mem_name_wref = JNIHandles::make_weak_global(mem_name); |
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2764 MutexLocker ml(MemberNameTable_lock); |
10345
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2765 assert(0 <= index && index < idnum_allocated_count(), "index is out of bounds"); |
10133
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2766 DEBUG_ONLY(No_Safepoint_Verifier nsv); |
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2767 |
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2768 if (_member_names == NULL) { |
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2769 _member_names = new (ResourceObj::C_HEAP, mtClass) MemberNameTable(idnum_allocated_count()); |
10133
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2770 } |
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2771 _member_names->add_member_name(index, mem_name_wref); |
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2772 } |
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2773 |
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2774 oop InstanceKlass::get_member_name(int index) { |
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2775 MutexLocker ml(MemberNameTable_lock); |
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2776 assert(0 <= index && index < idnum_allocated_count(), "index is out of bounds"); |
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2777 DEBUG_ONLY(No_Safepoint_Verifier nsv); |
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2778 |
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2779 if (_member_names == NULL) { |
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2780 return NULL; |
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2781 } |
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2782 oop mem_name =_member_names->get_member_name(index); |
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2783 return mem_name; |
10133
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2784 } |
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2785 |
0 | 2786 // ----------------------------------------------------------------------------------------------------- |
6725
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2787 // Printing |
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2788 |
0 | 2789 #ifndef PRODUCT |
2790 | |
665
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|
2791 #define BULLET " - " |
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2792 |
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2793 static const char* state_names[] = { |
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2794 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
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2795 }; |
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2796 |
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2797 void InstanceKlass::print_on(outputStream* st) const { |
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2798 assert(is_klass(), "must be klass"); |
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2799 Klass::print_on(st); |
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2800 |
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2801 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
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2802 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2803 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
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2804 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
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2805 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2806 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
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2807 st->print(BULLET"sub: "); |
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2808 Klass* sub = subklass(); |
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2809 int n; |
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2810 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
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2811 if (n < MaxSubklassPrintSize) { |
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2812 sub->print_value_on(st); |
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2813 st->print(" "); |
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2814 } |
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2815 } |
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2816 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
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2817 st->cr(); |
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|
2818 |
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2819 if (is_interface()) { |
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2820 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
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2821 if (nof_implementors() == 1) { |
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2822 st->print_cr(BULLET"implementor: "); |
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2823 st->print(" "); |
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2824 implementor()->print_value_on(st); |
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|
2825 st->cr(); |
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|
2826 } |
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|
2827 } |
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|
2828 |
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2829 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
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2830 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
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2831 if (Verbose) { |
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2832 Array<Method*>* method_array = methods(); |
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2833 for(int i = 0; i < method_array->length(); i++) { |
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2834 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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2835 } |
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|
2836 } |
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2837 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
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2838 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
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2839 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
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2840 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
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2841 if (class_loader_data() != NULL) { |
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|
2842 st->print(BULLET"class loader data: "); |
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2843 class_loader_data()->print_value_on(st); |
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|
2844 st->cr(); |
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|
2845 } |
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2846 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
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2847 if (source_file_name() != NULL) { |
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2848 st->print(BULLET"source file: "); |
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|
2849 source_file_name()->print_value_on(st); |
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2850 st->cr(); |
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|
2851 } |
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2852 if (source_debug_extension() != NULL) { |
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|
2853 st->print(BULLET"source debug extension: "); |
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2854 st->print("%s", source_debug_extension()); |
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|
2855 st->cr(); |
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|
2856 } |
8031 | 2857 st->print(BULLET"class annotations: "); class_annotations()->print_value_on(st); st->cr(); |
2858 st->print(BULLET"class type annotations: "); class_type_annotations()->print_value_on(st); st->cr(); | |
2859 st->print(BULLET"field annotations: "); fields_annotations()->print_value_on(st); st->cr(); | |
2860 st->print(BULLET"field type annotations: "); fields_type_annotations()->print_value_on(st); st->cr(); | |
6725
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2861 { |
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|
2862 ResourceMark rm; |
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|
2863 // PreviousVersionInfo objects returned via PreviousVersionWalker |
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|
2864 // contain a GrowableArray of handles. We have to clean up the |
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2865 // GrowableArray _after_ the PreviousVersionWalker destructor |
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|
2866 // has destroyed the handles. |
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|
2867 { |
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|
2868 bool have_pv = false; |
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|
2869 PreviousVersionWalker pvw((InstanceKlass*)this); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2870 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
|
2871 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
|
2872 if (!have_pv) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2873 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
|
2874 have_pv = true; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2875 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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|
2876 } |
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6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2877 if (have_pv) st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2878 } // pvw is cleaned up |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2879 } // rm is cleaned up |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2880 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2881 if (generic_signature() != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2882 st->print(BULLET"generic signature: "); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2883 generic_signature()->print_value_on(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2884 st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2885 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2886 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
|
2887 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
|
2888 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
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diff
changeset
|
2889 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
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diff
changeset
|
2890 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
|
2891 FieldPrinter print_static_field(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2892 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2893 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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diff
changeset
|
2894 FieldPrinter print_nonstatic_field(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2895 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2896 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2897 st->print(BULLET"non-static oop maps: "); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2898 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
|
2899 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
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|
2900 while (map < end_map) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2901 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
|
2902 map++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
|
2903 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
|
2904 st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
|
2905 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
|
2906 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2907 #endif //PRODUCT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2908 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2909 void InstanceKlass::print_value_on(outputStream* st) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2910 assert(is_klass(), "must be klass"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2911 name()->print_value_on(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2912 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2913 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2914 #ifndef PRODUCT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2915 |
0 | 2916 void FieldPrinter::do_field(fieldDescriptor* fd) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2917 _st->print(BULLET); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2918 if (_obj == NULL) { |
0 | 2919 fd->print_on(_st); |
2920 _st->cr(); | |
2921 } else { | |
2922 fd->print_on_for(_st, _obj); | |
2923 _st->cr(); | |
2924 } | |
2925 } | |
2926 | |
2927 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2928 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
0 | 2929 Klass::oop_print_on(obj, st); |
2930 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2931 if (this == SystemDictionary::String_klass()) { |
0 | 2932 typeArrayOop value = java_lang_String::value(obj); |
2933 juint offset = java_lang_String::offset(obj); | |
2934 juint length = java_lang_String::length(obj); | |
2935 if (value != NULL && | |
2936 value->is_typeArray() && | |
2937 offset <= (juint) value->length() && | |
2938 offset + length <= (juint) value->length()) { | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2939 st->print(BULLET"string: "); |
0 | 2940 Handle h_obj(obj); |
2941 java_lang_String::print(h_obj, st); | |
2942 st->cr(); | |
2943 if (!WizardMode) return; // that is enough | |
2944 } | |
2945 } | |
2946 | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2947 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
|
2948 FieldPrinter print_field(st, obj); |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2949 do_nonstatic_fields(&print_field); |
0 | 2950 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2951 if (this == SystemDictionary::Class_klass()) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2952 st->print(BULLET"signature: "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2953 java_lang_Class::print_signature(obj, st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2954 st->cr(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2955 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2956 st->print(BULLET"fake entry for mirror: "); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2957 mirrored_klass->print_value_on_maybe_null(st); |
0 | 2958 st->cr(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2959 Klass* array_klass = java_lang_Class::array_klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2960 st->print(BULLET"fake entry for array: "); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2961 array_klass->print_value_on_maybe_null(st); |
0 | 2962 st->cr(); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2963 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
|
2964 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
|
2965 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
|
2966 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
|
2967 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
|
2968 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2969 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2970 st->print(BULLET"signature: "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2971 java_lang_invoke_MethodType::print_signature(obj, st); |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2972 st->cr(); |
0 | 2973 } |
2974 } | |
2975 | |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2976 #endif //PRODUCT |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2977 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2978 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
0 | 2979 st->print("a "); |
2980 name()->print_value_on(st); | |
2981 obj->print_address_on(st); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2982 if (this == SystemDictionary::String_klass() |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2983 && java_lang_String::value(obj) != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2984 ResourceMark rm; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2985 int len = java_lang_String::length(obj); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2986 int plen = (len < 24 ? len : 12); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2987 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2988 st->print(" = \"%s\"", str); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2989 if (len > plen) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2990 st->print("...[%d]", len); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2991 } else if (this == SystemDictionary::Class_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2992 Klass* k = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2993 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2994 if (k != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2995 k->print_value_on(st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2996 } else { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2997 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2998 st->print("%s", tname ? tname : "type?"); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2999 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3000 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
3001 st->print(" = "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
3002 java_lang_invoke_MethodType::print_signature(obj, st); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3003 } else if (java_lang_boxing_object::is_instance(obj)) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3004 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3005 java_lang_boxing_object::print(obj, st); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3006 } 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
|
3007 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
|
3008 if (vmentry != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3009 st->print(" => "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3010 vmentry->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3011 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3012 } else if (this == SystemDictionary::MemberName_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3013 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
|
3014 if (vmtarget != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
3015 st->print(" = "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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3016 vmtarget->print_value_on(st); |
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3017 } else { |
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3018 java_lang_invoke_MemberName::clazz(obj)->print_value_on(st); |
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3019 st->print("."); |
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3020 java_lang_invoke_MemberName::name(obj)->print_value_on(st); |
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3021 } |
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3022 } |
0 | 3023 } |
3024 | |
6725
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3025 const char* InstanceKlass::internal_name() const { |
0 | 3026 return external_name(); |
3027 } | |
3028 | |
7956 | 3029 #if INCLUDE_SERVICES |
3030 // Size Statistics | |
3031 void InstanceKlass::collect_statistics(KlassSizeStats *sz) const { | |
3032 Klass::collect_statistics(sz); | |
3033 | |
3034 sz->_inst_size = HeapWordSize * size_helper(); | |
3035 sz->_vtab_bytes = HeapWordSize * align_object_offset(vtable_length()); | |
3036 sz->_itab_bytes = HeapWordSize * align_object_offset(itable_length()); | |
3037 sz->_nonstatic_oopmap_bytes = HeapWordSize * | |
3038 ((is_interface() || is_anonymous()) ? | |
3039 align_object_offset(nonstatic_oop_map_size()) : | |
3040 nonstatic_oop_map_size()); | |
3041 | |
3042 int n = 0; | |
3043 n += (sz->_methods_array_bytes = sz->count_array(methods())); | |
3044 n += (sz->_method_ordering_bytes = sz->count_array(method_ordering())); | |
3045 n += (sz->_local_interfaces_bytes = sz->count_array(local_interfaces())); | |
3046 n += (sz->_transitive_interfaces_bytes = sz->count_array(transitive_interfaces())); | |
3047 n += (sz->_fields_bytes = sz->count_array(fields())); | |
3048 n += (sz->_inner_classes_bytes = sz->count_array(inner_classes())); | |
3049 sz->_ro_bytes += n; | |
3050 | |
3051 const ConstantPool* cp = constants(); | |
3052 if (cp) { | |
3053 cp->collect_statistics(sz); | |
3054 } | |
3055 | |
3056 const Annotations* anno = annotations(); | |
3057 if (anno) { | |
3058 anno->collect_statistics(sz); | |
3059 } | |
3060 | |
3061 const Array<Method*>* methods_array = methods(); | |
3062 if (methods()) { | |
3063 for (int i = 0; i < methods_array->length(); i++) { | |
3064 Method* method = methods_array->at(i); | |
3065 if (method) { | |
3066 sz->_method_count ++; | |
3067 method->collect_statistics(sz); | |
3068 } | |
3069 } | |
3070 } | |
3071 } | |
3072 #endif // INCLUDE_SERVICES | |
3073 | |
0 | 3074 // Verification |
3075 | |
3076 class VerifyFieldClosure: public OopClosure { | |
113
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3077 protected: |
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3078 template <class T> void do_oop_work(T* p) { |
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3079 oop obj = oopDesc::load_decode_heap_oop(p); |
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3080 if (!obj->is_oop_or_null()) { |
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3081 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
0 | 3082 Universe::print(); |
3083 guarantee(false, "boom"); | |
3084 } | |
3085 } | |
113
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3086 public: |
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3087 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
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3088 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
0 | 3089 }; |
3090 | |
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3091 void InstanceKlass::verify_on(outputStream* st) { |
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3092 Klass::verify_on(st); |
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3093 Thread *thread = Thread::current(); |
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3094 |
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3095 #ifndef PRODUCT |
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3096 // Avoid redundant verifies |
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3097 if (_verify_count == Universe::verify_count()) return; |
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3098 _verify_count = Universe::verify_count(); |
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3099 #endif |
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3100 // Verify that klass is present in SystemDictionary |
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3101 if (is_loaded() && !is_anonymous()) { |
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3102 Symbol* h_name = name(); |
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3103 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
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3104 } |
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3105 |
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3106 // Verify static fields |
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3107 VerifyFieldClosure blk; |
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3108 |
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3109 // Verify vtables |
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3110 if (is_linked()) { |
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3111 ResourceMark rm(thread); |
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3112 // $$$ This used to be done only for m/s collections. Doing it |
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3113 // always seemed a valid generalization. (DLD -- 6/00) |
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3114 vtable()->verify(st); |
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3115 } |
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3116 |
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3117 // Verify first subklass |
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3118 if (subklass_oop() != NULL) { |
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3119 guarantee(subklass_oop()->is_metadata(), "should be in metaspace"); |
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3120 guarantee(subklass_oop()->is_klass(), "should be klass"); |
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3121 } |
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3122 |
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3123 // Verify siblings |
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3124 Klass* super = this->super(); |
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3125 Klass* sib = next_sibling(); |
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3126 if (sib != NULL) { |
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3127 if (sib == this) { |
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3128 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
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3129 } |
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3130 |
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3131 guarantee(sib->is_metadata(), "should be in metaspace"); |
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3132 guarantee(sib->is_klass(), "should be klass"); |
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3133 guarantee(sib->super() == super, "siblings should have same superklass"); |
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3134 } |
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3135 |
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3136 // Verify implementor fields |
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3137 Klass* im = implementor(); |
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3138 if (im != NULL) { |
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3139 guarantee(is_interface(), "only interfaces should have implementor set"); |
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3140 guarantee(im->is_klass(), "should be klass"); |
6983 | 3141 guarantee(!im->is_interface() || im == this, |
6725
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3142 "implementors cannot be interfaces"); |
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|
3143 } |
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3144 |
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3145 // Verify local interfaces |
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3146 if (local_interfaces()) { |
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3147 Array<Klass*>* local_interfaces = this->local_interfaces(); |
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3148 for (int j = 0; j < local_interfaces->length(); j++) { |
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3149 Klass* e = local_interfaces->at(j); |
6983 | 3150 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
6725
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3151 } |
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3152 } |
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3153 |
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3154 // Verify transitive interfaces |
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3155 if (transitive_interfaces() != NULL) { |
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3156 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
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3157 for (int j = 0; j < transitive_interfaces->length(); j++) { |
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3158 Klass* e = transitive_interfaces->at(j); |
6983 | 3159 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
6725
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3160 } |
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3161 } |
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3162 |
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3163 // Verify methods |
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3164 if (methods() != NULL) { |
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3165 Array<Method*>* methods = this->methods(); |
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3166 for (int j = 0; j < methods->length(); j++) { |
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3167 guarantee(methods->at(j)->is_metadata(), "should be in metaspace"); |
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3168 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
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3169 } |
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3170 for (int j = 0; j < methods->length() - 1; j++) { |
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3171 Method* m1 = methods->at(j); |
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3172 Method* m2 = methods->at(j + 1); |
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3173 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
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3174 } |
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3175 } |
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3176 |
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3177 // Verify method ordering |
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3178 if (method_ordering() != NULL) { |
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3179 Array<int>* method_ordering = this->method_ordering(); |
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3180 int length = method_ordering->length(); |
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3181 if (JvmtiExport::can_maintain_original_method_order() || |
9057
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|
3182 ((UseSharedSpaces || DumpSharedSpaces) && length != 0)) { |
6725
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3183 guarantee(length == methods()->length(), "invalid method ordering length"); |
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3184 jlong sum = 0; |
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3185 for (int j = 0; j < length; j++) { |
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3186 int original_index = method_ordering->at(j); |
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3187 guarantee(original_index >= 0, "invalid method ordering index"); |
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3188 guarantee(original_index < length, "invalid method ordering index"); |
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3189 sum += original_index; |
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3190 } |
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3191 // Verify sum of indices 0,1,...,length-1 |
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3192 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
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3193 } else { |
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3194 guarantee(length == 0, "invalid method ordering length"); |
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3195 } |
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3196 } |
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3197 |
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3198 // Verify JNI static field identifiers |
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3199 if (jni_ids() != NULL) { |
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3200 jni_ids()->verify(this); |
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3201 } |
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3202 |
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3203 // Verify other fields |
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3204 if (array_klasses() != NULL) { |
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3205 guarantee(array_klasses()->is_metadata(), "should be in metaspace"); |
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3206 guarantee(array_klasses()->is_klass(), "should be klass"); |
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3207 } |
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3208 if (constants() != NULL) { |
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3209 guarantee(constants()->is_metadata(), "should be in metaspace"); |
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3210 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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3211 } |
8693
872b3feace55
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3212 const Klass* host = host_klass(); |
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3213 if (host != NULL) { |
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|
3214 guarantee(host->is_metadata(), "should be in metaspace"); |
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|
3215 guarantee(host->is_klass(), "should be klass"); |
6725
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3216 } |
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3217 } |
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3218 |
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3219 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
0 | 3220 Klass::oop_verify_on(obj, st); |
3221 VerifyFieldClosure blk; | |
6725
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3222 obj->oop_iterate_no_header(&blk); |
0 | 3223 } |
3224 | |
6725
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3225 |
113
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3226 // JNIid class for jfieldIDs only |
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3227 // Note to reviewers: |
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3228 // These JNI functions are just moved over to column 1 and not changed |
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3229 // in the compressed oops workspace. |
6725
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3230 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
113
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3231 _holder = holder; |
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3232 _offset = offset; |
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3233 _next = next; |
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3234 debug_only(_is_static_field_id = false;) |
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3235 } |
0 | 3236 |
3237 | |
113
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3238 JNIid* JNIid::find(int offset) { |
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3239 JNIid* current = this; |
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3240 while (current != NULL) { |
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3241 if (current->offset() == offset) return current; |
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3242 current = current->next(); |
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|
3243 } |
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|
3244 return NULL; |
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3245 } |
0 | 3246 |
3247 void JNIid::deallocate(JNIid* current) { | |
113
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3248 while (current != NULL) { |
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3249 JNIid* next = current->next(); |
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3250 delete current; |
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|
3251 current = next; |
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3252 } |
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|
3253 } |
0 | 3254 |
3255 | |
6725
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3256 void JNIid::verify(Klass* holder) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
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|
3257 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
113
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3258 int end_field_offset; |
6725
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3259 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
0 | 3260 |
113
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3261 JNIid* current = this; |
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3262 while (current != NULL) { |
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3263 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
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|
3264 #ifdef ASSERT |
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|
3265 int o = current->offset(); |
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3266 if (current->is_static_field_id()) { |
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|
3267 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
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|
3268 } |
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|
3269 #endif |
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|
3270 current = current->next(); |
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|
3271 } |
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|
3272 } |
0 | 3273 |
3274 | |
3275 #ifdef ASSERT | |
6725
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3276 void InstanceKlass::set_init_state(ClassState state) { |
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3277 bool good_state = is_shared() ? (_init_state <= state) |
113
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3278 : (_init_state < state); |
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|
3279 assert(good_state || state == allocated, "illegal state transition"); |
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
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|
3280 _init_state = (u1)state; |
113
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3281 } |
0 | 3282 #endif |
3283 | |
3284 | |
3285 // RedefineClasses() support for previous versions: | |
3286 | |
6725
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3287 // Purge previous versions |
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|
3288 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
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3289 if (ik->previous_versions() != NULL) { |
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3290 // This klass has previous versions so see what we can cleanup |
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3291 // while it is safe to do so. |
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|
3292 |
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3293 int deleted_count = 0; // leave debugging breadcrumbs |
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3294 int live_count = 0; |
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|
3295 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
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3296 ClassLoaderData::the_null_class_loader_data() : |
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|
3297 ik->class_loader_data(); |
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|
3298 |
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|
3299 // RC_TRACE macro has an embedded ResourceMark |
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3300 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
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3301 ik->external_name(), ik->previous_versions()->length())); |
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3302 |
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|
3303 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
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3304 // check the previous versions array |
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3305 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
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3306 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
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3307 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
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|
3308 |
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|
3309 ConstantPool* pvcp = cp_ref; |
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3310 if (!pvcp->on_stack()) { |
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3311 // If the constant pool isn't on stack, none of the methods |
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3312 // are executing. Delete all the methods, the constant pool and |
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3313 // and this previous version node. |
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3314 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3315 if (method_refs != NULL) { |
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3316 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3317 Method* method = method_refs->at(j); |
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3318 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3319 method_refs->remove_at(j); |
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3320 // method will be freed with associated class. |
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|
3321 } |
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|
3322 } |
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3323 // Remove the constant pool |
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3324 delete pv_node; |
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3325 // Since we are traversing the array backwards, we don't have to |
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|
3326 // do anything special with the index. |
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|
3327 ik->previous_versions()->remove_at(i); |
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|
3328 deleted_count++; |
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|
3329 continue; |
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|
3330 } else { |
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|
3331 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
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3332 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
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3333 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
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3334 live_count++; |
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|
3335 } |
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|
3336 |
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3337 // At least one method is live in this previous version, clean out |
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3338 // the others or mark them as obsolete. |
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3339 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3340 if (method_refs != NULL) { |
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3341 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
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|
3342 method_refs->length())); |
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|
3343 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3344 Method* method = method_refs->at(j); |
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3345 assert(method != NULL, "method ref was unexpectedly cleared"); |
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|
3346 |
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|
3347 // Remove the emcp method if it's not executing |
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3348 // If it's been made obsolete by a redefinition of a non-emcp |
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3349 // method, mark it as obsolete but leave it to clean up later. |
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3350 if (!method->on_stack()) { |
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3351 method_refs->remove_at(j); |
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3352 } else if (emcp_method_count == 0) { |
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3353 method->set_is_obsolete(); |
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|
3354 } else { |
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3355 // RC_TRACE macro has an embedded ResourceMark |
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|
3356 RC_TRACE(0x00000200, |
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3357 ("purge: %s(%s): prev method @%d in version @%d is alive", |
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3358 method->name()->as_C_string(), |
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3359 method->signature()->as_C_string(), j, i)); |
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|
3360 } |
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|
3361 } |
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|
3362 } |
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|
3363 } |
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|
3364 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
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3365 RC_TRACE(0x00000200, |
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3366 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
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|
3367 deleted_count)); |
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|
3368 } |
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|
3369 } |
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|
3370 |
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|
3371 // External interface for use during class unloading. |
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3372 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
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3373 // Call with >0 emcp methods since they are not currently being redefined. |
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3374 purge_previous_versions_internal(ik, 1); |
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|
3375 } |
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|
3376 |
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|
3377 |
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3378 // Potentially add an information node that contains pointers to the |
0 | 3379 // interesting parts of the previous version of the_class. |
6725
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|
3380 // This is also where we clean out any unused references. |
977
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
974
diff
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|
3381 // Note that while we delete nodes from the _previous_versions |
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
974
diff
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|
3382 // array, we never delete the array itself until the klass is |
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
dcubed
parents:
974
diff
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|
3383 // unloaded. The has_been_redefined() query depends on that fact. |
74a5db69c1fe
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dcubed
parents:
974
diff
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|
3384 // |
6725
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|
3385 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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52
diff
changeset
|
3386 BitMap* emcp_methods, int emcp_method_count) { |
0 | 3387 assert(Thread::current()->is_VM_thread(), |
113
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diff
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|
3388 "only VMThread can add previous versions"); |
0 | 3389 |
3390 if (_previous_versions == NULL) { | |
3391 // This is the first previous version so make some space. | |
3392 // Start with 2 elements under the assumption that the class | |
3393 // won't be redefined much. | |
6197 | 3394 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
0 | 3395 GrowableArray<PreviousVersionNode *>(2, true); |
3396 } | |
3397 | |
6725
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|
3398 ConstantPool* cp_ref = ikh->constants(); |
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|
3399 |
0 | 3400 // RC_TRACE macro has an embedded ResourceMark |
6725
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|
3401 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
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|
3402 "on_stack=%d", |
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|
3403 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
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|
3404 cp_ref->on_stack())); |
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|
3405 |
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|
3406 // If the constant pool for this previous version of the class |
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|
3407 // is not marked as being on the stack, then none of the methods |
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|
3408 // in this previous version of the class are on the stack so |
da91efe96a93
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|
3409 // we don't need to create a new PreviousVersionNode. However, |
da91efe96a93
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|
3410 // we still need to examine older previous versions below. |
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|
3411 Array<Method*>* old_methods = ikh->methods(); |
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|
3412 |
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|
3413 if (cp_ref->on_stack()) { |
0 | 3414 PreviousVersionNode * pv_node = NULL; |
3415 if (emcp_method_count == 0) { | |
6725
da91efe96a93
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|
3416 // non-shared ConstantPool gets a reference |
da91efe96a93
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|
3417 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
0 | 3418 RC_TRACE(0x00000400, |
6725
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|
3419 ("add: all methods are obsolete; flushing any EMCP refs")); |
0 | 3420 } else { |
3421 int local_count = 0; | |
6725
da91efe96a93
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coleenp
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|
3422 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
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|
3423 GrowableArray<Method*>(emcp_method_count, true); |
0 | 3424 for (int i = 0; i < old_methods->length(); i++) { |
3425 if (emcp_methods->at(i)) { | |
6725
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|
3426 // this old method is EMCP. Save it only if it's on the stack |
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|
3427 Method* old_method = old_methods->at(i); |
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|
3428 if (old_method->on_stack()) { |
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|
3429 method_refs->append(old_method); |
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|
3430 } |
0 | 3431 if (++local_count >= emcp_method_count) { |
3432 // no more EMCP methods so bail out now | |
3433 break; | |
3434 } | |
3435 } | |
3436 } | |
6725
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|
3437 // non-shared ConstantPool gets a reference |
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|
3438 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
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|
3439 } |
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|
3440 // append new previous version. |
0 | 3441 _previous_versions->append(pv_node); |
6725
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|
3442 } |
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diff
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|
3443 |
da91efe96a93
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|
3444 // Since the caller is the VMThread and we are at a safepoint, this |
da91efe96a93
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coleenp
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diff
changeset
|
3445 // is a good time to clear out unused references. |
0 | 3446 |
3447 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
3448 _previous_versions->length())); | |
3449 | |
6725
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|
3450 // Purge previous versions not executing on the stack |
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|
3451 purge_previous_versions_internal(this, emcp_method_count); |
0 | 3452 |
3453 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
3454 | |
3455 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
6725
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|
3456 _previous_versions->length() > 0) { |
da91efe96a93
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diff
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|
3457 // We have a mix of obsolete and EMCP methods so we have to |
0 | 3458 // clear out any matching EMCP method entries the hard way. |
3459 int local_count = 0; | |
3460 for (int i = 0; i < old_methods->length(); i++) { | |
3461 if (!emcp_methods->at(i)) { | |
3462 // only obsolete methods are interesting | |
6725
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|
3463 Method* old_method = old_methods->at(i); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
3464 Symbol* m_name = old_method->name(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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1972
diff
changeset
|
3465 Symbol* m_signature = old_method->signature(); |
0 | 3466 |
6725
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|
3467 // we might not have added the last entry |
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|
3468 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
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|
3469 // check the previous versions array for non executing obsolete methods |
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|
3470 PreviousVersionNode * pv_node = _previous_versions->at(j); |
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|
3471 |
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|
3472 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3473 if (method_refs == NULL) { |
3474 // We have run into a PreviousVersion generation where | |
3475 // all methods were made obsolete during that generation's | |
3476 // RedefineClasses() operation. At the time of that | |
3477 // operation, all EMCP methods were flushed so we don't | |
3478 // have to go back any further. | |
3479 // | |
3480 // A NULL method_refs is different than an empty method_refs. | |
3481 // We cannot infer any optimizations about older generations | |
3482 // from an empty method_refs for the current generation. | |
3483 break; | |
3484 } | |
3485 | |
3486 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
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3487 Method* method = method_refs->at(k); |
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3488 |
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3489 if (!method->is_obsolete() && |
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3490 method->name() == m_name && |
0 | 3491 method->signature() == m_signature) { |
3492 // The current RedefineClasses() call has made all EMCP | |
3493 // versions of this method obsolete so mark it as obsolete | |
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3494 // and remove the reference. |
0 | 3495 RC_TRACE(0x00000400, |
3496 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
3497 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
3498 | |
3499 method->set_is_obsolete(); | |
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3500 // Leave obsolete methods on the previous version list to |
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3501 // clean up later. |
0 | 3502 break; |
3503 } | |
3504 } | |
3505 | |
3506 // The previous loop may not find a matching EMCP method, but | |
3507 // that doesn't mean that we can optimize and not go any | |
3508 // further back in the PreviousVersion generations. The EMCP | |
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3509 // method for this generation could have already been deleted, |
0 | 3510 // but there still may be an older EMCP method that has not |
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3511 // been deleted. |
0 | 3512 } |
3513 | |
3514 if (++local_count >= obsolete_method_count) { | |
3515 // no more obsolete methods so bail out now | |
3516 break; | |
3517 } | |
3518 } | |
3519 } | |
3520 } | |
3521 } // end add_previous_version() | |
3522 | |
3523 | |
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3524 // Determine if InstanceKlass has a previous version. |
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3525 bool InstanceKlass::has_previous_version() const { |
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3526 return (_previous_versions != NULL && _previous_versions->length() > 0); |
0 | 3527 } // end has_previous_version() |
3528 | |
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3529 |
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3530 Method* InstanceKlass::method_with_idnum(int idnum) { |
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3531 Method* m = NULL; |
0 | 3532 if (idnum < methods()->length()) { |
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3533 m = methods()->at(idnum); |
0 | 3534 } |
3535 if (m == NULL || m->method_idnum() != idnum) { | |
3536 for (int index = 0; index < methods()->length(); ++index) { | |
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3537 m = methods()->at(index); |
0 | 3538 if (m->method_idnum() == idnum) { |
3539 return m; | |
3540 } | |
3541 } | |
3542 } | |
3543 return m; | |
3544 } | |
3545 | |
3546 | |
3547 // Construct a PreviousVersionNode entry for the array hung off | |
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3548 // the InstanceKlass. |
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3549 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
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3550 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
0 | 3551 |
3552 _prev_constant_pool = prev_constant_pool; | |
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3553 _prev_cp_is_weak = prev_cp_is_weak; |
0 | 3554 _prev_EMCP_methods = prev_EMCP_methods; |
3555 } | |
3556 | |
3557 | |
3558 // Destroy a PreviousVersionNode | |
3559 PreviousVersionNode::~PreviousVersionNode() { | |
3560 if (_prev_constant_pool != NULL) { | |
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3561 _prev_constant_pool = NULL; |
0 | 3562 } |
3563 | |
3564 if (_prev_EMCP_methods != NULL) { | |
3565 delete _prev_EMCP_methods; | |
3566 } | |
3567 } | |
3568 | |
3569 | |
3570 // Construct a PreviousVersionInfo entry | |
3571 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
3572 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
3573 _prev_EMCP_method_handles = NULL; | |
3574 | |
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3575 ConstantPool* cp = pv_node->prev_constant_pool(); |
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3576 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
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3577 if (cp == NULL) { |
0 | 3578 return; // robustness |
3579 } | |
3580 | |
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3581 // make the ConstantPool* safe to return |
0 | 3582 _prev_constant_pool_handle = constantPoolHandle(cp); |
3583 | |
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3584 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3585 if (method_refs == NULL) { |
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3586 // the InstanceKlass did not have any EMCP methods |
0 | 3587 return; |
3588 } | |
3589 | |
3590 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
3591 | |
3592 int n_methods = method_refs->length(); | |
3593 for (int i = 0; i < n_methods; i++) { | |
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3594 Method* method = method_refs->at(i); |
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3595 assert (method != NULL, "method has been cleared"); |
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3596 if (method == NULL) { |
0 | 3597 continue; // robustness |
3598 } | |
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3599 // make the Method* safe to return |
0 | 3600 _prev_EMCP_method_handles->append(methodHandle(method)); |
3601 } | |
3602 } | |
3603 | |
3604 | |
3605 // Destroy a PreviousVersionInfo | |
3606 PreviousVersionInfo::~PreviousVersionInfo() { | |
3607 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
3608 // don't have to delete it. | |
3609 } | |
3610 | |
3611 | |
3612 // Construct a helper for walking the previous versions array | |
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3613 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
0 | 3614 _previous_versions = ik->previous_versions(); |
3615 _current_index = 0; | |
3616 // _hm needs no initialization | |
3617 _current_p = NULL; | |
3618 } | |
3619 | |
3620 | |
3621 // Destroy a PreviousVersionWalker | |
3622 PreviousVersionWalker::~PreviousVersionWalker() { | |
3623 // Delete the current info just in case the caller didn't walk to | |
3624 // the end of the previous versions list. No harm if _current_p is | |
3625 // already NULL. | |
3626 delete _current_p; | |
3627 | |
3628 // When _hm is destroyed, all the Handles returned in | |
3629 // PreviousVersionInfo objects will be destroyed. | |
3630 // Also, after this destructor is finished it will be | |
3631 // safe to delete the GrowableArray allocated in the | |
3632 // PreviousVersionInfo objects. | |
3633 } | |
3634 | |
3635 | |
3636 // Return the interesting information for the next previous version | |
3637 // of the klass. Returns NULL if there are no more previous versions. | |
3638 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
3639 if (_previous_versions == NULL) { | |
3640 // no previous versions so nothing to return | |
3641 return NULL; | |
3642 } | |
3643 | |
3644 delete _current_p; // cleanup the previous info for the caller | |
3645 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
3646 | |
3647 int length = _previous_versions->length(); | |
3648 | |
3649 while (_current_index < length) { | |
3650 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
6197 | 3651 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
0 | 3652 PreviousVersionInfo(pv_node); |
3653 | |
3654 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
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3655 assert (!cp_h.is_null(), "null cp found in previous version"); |
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3656 |
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3657 // The caller will need to delete pv_info when they are done with it. |
0 | 3658 _current_p = pv_info; |
3659 return pv_info; | |
3660 } | |
3661 | |
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3662 // all of the underlying nodes' info has been deleted |
0 | 3663 return NULL; |
3664 } // end next_previous_version() |