Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/instanceKlass.cpp @ 10149:d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
Summary: Call this function from the ClassLoaderData destructor instead of the system dictionary walk.
Reviewed-by: stefank, mgerdin
author | coleenp |
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date | Wed, 24 Apr 2013 16:19:35 -0400 |
parents | 6337ca4dcad8 |
children | c115fac239eb |
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_protection_domain(NULL); |
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272 set_signers(NULL); |
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273 set_source_file_name(NULL); |
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274 set_source_debug_extension(NULL, 0); |
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275 set_array_name(NULL); |
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276 set_inner_classes(NULL); |
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277 set_static_oop_field_count(0); |
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278 set_nonstatic_field_size(0); |
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279 set_is_marked_dependent(false); |
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280 set_init_state(InstanceKlass::allocated); |
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281 set_init_thread(NULL); |
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282 set_init_lock(NULL); |
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283 set_reference_type(rt); |
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284 set_oop_map_cache(NULL); |
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285 set_jni_ids(NULL); |
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286 set_osr_nmethods_head(NULL); |
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287 set_breakpoints(NULL); |
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288 init_previous_versions(); |
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289 set_generic_signature(NULL); |
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290 release_set_methods_jmethod_ids(NULL); |
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291 release_set_methods_cached_itable_indices(NULL); |
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292 set_annotations(NULL); |
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293 set_jvmti_cached_class_field_map(NULL); |
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294 set_initial_method_idnum(0); |
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295 _dependencies = NULL; |
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296 set_jvmti_cached_class_field_map(NULL); |
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297 set_cached_class_file(NULL, 0); |
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298 set_initial_method_idnum(0); |
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299 set_minor_version(0); |
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300 set_major_version(0); |
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301 NOT_PRODUCT(_verify_count = 0;) |
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302 |
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303 // initialize the non-header words to zero |
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304 intptr_t* p = (intptr_t*)this; |
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305 for (int index = InstanceKlass::header_size(); index < iksize; index++) { |
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306 p[index] = NULL_WORD; |
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307 } |
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308 |
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309 // Set temporary value until parseClassFile updates it with the real instance |
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310 // size. |
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311 set_layout_helper(Klass::instance_layout_helper(0, true)); |
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312 } |
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313 |
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314 |
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315 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data, |
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316 Array<Method*>* methods) { |
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317 if (methods != NULL && methods != Universe::the_empty_method_array()) { |
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318 for (int i = 0; i < methods->length(); i++) { |
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319 Method* method = methods->at(i); |
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320 if (method == NULL) continue; // maybe null if error processing |
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321 // Only want to delete methods that are not executing for RedefineClasses. |
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322 // The previous version will point to them so they're not totally dangling |
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323 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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324 MetadataFactory::free_metadata(loader_data, method); |
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325 } |
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326 MetadataFactory::free_array<Method*>(loader_data, methods); |
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327 } |
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328 } |
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329 |
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330 void InstanceKlass::deallocate_interfaces(ClassLoaderData* loader_data, |
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331 Klass* super_klass, |
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332 Array<Klass*>* local_interfaces, |
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333 Array<Klass*>* transitive_interfaces) { |
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334 // Only deallocate transitive interfaces if not empty, same as super class |
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335 // or same as local interfaces. See code in parseClassFile. |
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336 Array<Klass*>* ti = transitive_interfaces; |
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337 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces) { |
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338 // check that the interfaces don't come from super class |
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339 Array<Klass*>* sti = (super_klass == NULL) ? NULL : |
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340 InstanceKlass::cast(super_klass)->transitive_interfaces(); |
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341 if (ti != sti) { |
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342 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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343 } |
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344 } |
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345 |
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346 // local interfaces can be empty |
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347 if (local_interfaces != Universe::the_empty_klass_array()) { |
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348 MetadataFactory::free_array<Klass*>(loader_data, local_interfaces); |
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349 } |
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350 } |
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351 |
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352 // This function deallocates the metadata and C heap pointers that the |
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353 // InstanceKlass points to. |
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354 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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355 |
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356 // Orphan the mirror first, CMS thinks it's still live. |
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357 if (java_mirror() != NULL) { |
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358 java_lang_Class::set_klass(java_mirror(), NULL); |
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359 } |
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360 |
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361 // Need to take this class off the class loader data list. |
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362 loader_data->remove_class(this); |
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363 |
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364 // The array_klass for this class is created later, after error handling. |
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365 // For class redefinition, we keep the original class so this scratch class |
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366 // doesn't have an array class. Either way, assert that there is nothing |
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367 // to deallocate. |
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368 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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369 |
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370 // Release C heap allocated data that this might point to, which includes |
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371 // reference counting symbol names. |
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372 release_C_heap_structures(); |
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373 |
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374 deallocate_methods(loader_data, methods()); |
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375 set_methods(NULL); |
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376 |
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377 if (method_ordering() != Universe::the_empty_int_array()) { |
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378 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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379 } |
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380 set_method_ordering(NULL); |
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381 |
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382 // This array is in Klass, but remove it with the InstanceKlass since |
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383 // this place would be the only caller and it can share memory with transitive |
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384 // interfaces. |
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385 if (secondary_supers() != Universe::the_empty_klass_array() && |
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386 secondary_supers() != transitive_interfaces()) { |
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387 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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388 } |
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389 set_secondary_supers(NULL); |
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390 |
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391 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces()); |
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392 set_transitive_interfaces(NULL); |
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393 set_local_interfaces(NULL); |
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394 |
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395 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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396 set_fields(NULL, 0); |
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397 |
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398 // If a method from a redefined class is using this constant pool, don't |
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399 // delete it, yet. The new class's previous version will point to this. |
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400 if (constants() != NULL) { |
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401 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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402 MetadataFactory::free_metadata(loader_data, constants()); |
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403 set_constants(NULL); |
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404 } |
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405 |
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406 if (inner_classes() != Universe::the_empty_short_array()) { |
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407 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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408 } |
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409 set_inner_classes(NULL); |
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410 |
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411 // Null out Java heap objects, although these won't be walked to keep |
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412 // alive once this InstanceKlass is deallocated. |
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413 set_protection_domain(NULL); |
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414 set_signers(NULL); |
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415 set_init_lock(NULL); |
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416 |
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417 // We should deallocate the Annotations instance |
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418 MetadataFactory::free_metadata(loader_data, annotations()); |
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419 set_annotations(NULL); |
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420 } |
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421 |
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422 volatile oop InstanceKlass::init_lock() const { |
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423 volatile oop lock = _init_lock; // read once |
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424 assert((oop)lock != NULL || !is_not_initialized(), // initialized or in_error state |
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425 "only fully initialized state can have a null lock"); |
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426 return lock; |
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427 } |
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428 |
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429 // Set the initialization lock to null so the object can be GC'ed. Any racing |
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430 // threads to get this lock will see a null lock and will not lock. |
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431 // That's okay because they all check for initialized state after getting |
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432 // the lock and return. |
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433 void InstanceKlass::fence_and_clear_init_lock() { |
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434 // make sure previous stores are all done, notably the init_state. |
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435 OrderAccess::storestore(); |
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436 klass_oop_store(&_init_lock, NULL); |
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437 assert(!is_not_initialized(), "class must be initialized now"); |
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438 } |
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439 |
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440 |
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441 bool InstanceKlass::should_be_initialized() const { |
0 | 442 return !is_initialized(); |
443 } | |
444 | |
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445 klassVtable* InstanceKlass::vtable() const { |
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446 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
0 | 447 } |
448 | |
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449 klassItable* InstanceKlass::itable() const { |
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450 return new klassItable(instanceKlassHandle(this)); |
0 | 451 } |
452 | |
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453 void InstanceKlass::eager_initialize(Thread *thread) { |
0 | 454 if (!EagerInitialization) return; |
455 | |
456 if (this->is_not_initialized()) { | |
457 // abort if the the class has a class initializer | |
458 if (this->class_initializer() != NULL) return; | |
459 | |
460 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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461 Klass* super = this->super(); |
0 | 462 if (super == NULL) return; |
463 | |
464 // abort if the super class should be initialized | |
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465 if (!InstanceKlass::cast(super)->is_initialized()) return; |
0 | 466 |
467 // call body to expose the this pointer | |
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468 instanceKlassHandle this_oop(thread, this); |
0 | 469 eager_initialize_impl(this_oop); |
470 } | |
471 } | |
472 | |
473 | |
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474 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
0 | 475 EXCEPTION_MARK; |
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476 volatile oop init_lock = this_oop->init_lock(); |
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477 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 478 |
479 // abort if someone beat us to the initialization | |
480 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
481 | |
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482 ClassState old_state = this_oop->init_state(); |
0 | 483 link_class_impl(this_oop, true, THREAD); |
484 if (HAS_PENDING_EXCEPTION) { | |
485 CLEAR_PENDING_EXCEPTION; | |
486 // Abort if linking the class throws an exception. | |
487 | |
488 // Use a test to avoid redundantly resetting the state if there's | |
489 // no change. Set_init_state() asserts that state changes make | |
490 // progress, whereas here we might just be spinning in place. | |
491 if( old_state != this_oop->_init_state ) | |
492 this_oop->set_init_state (old_state); | |
493 } else { | |
494 // linking successfull, mark class as initialized | |
495 this_oop->set_init_state (fully_initialized); | |
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496 this_oop->fence_and_clear_init_lock(); |
0 | 497 // trace |
498 if (TraceClassInitialization) { | |
499 ResourceMark rm(THREAD); | |
500 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
501 } | |
502 } | |
503 } | |
504 | |
505 | |
506 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
507 // process. The step comments refers to the procedure described in that section. | |
508 // Note: implementation moved to static method to expose the this pointer. | |
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509 void InstanceKlass::initialize(TRAPS) { |
0 | 510 if (this->should_be_initialized()) { |
511 HandleMark hm(THREAD); | |
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512 instanceKlassHandle this_oop(THREAD, this); |
0 | 513 initialize_impl(this_oop, CHECK); |
514 // Note: at this point the class may be initialized | |
515 // OR it may be in the state of being initialized | |
516 // in case of recursive initialization! | |
517 } else { | |
518 assert(is_initialized(), "sanity check"); | |
519 } | |
520 } | |
521 | |
522 | |
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523 bool InstanceKlass::verify_code( |
0 | 524 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
525 // 1) Verify the bytecodes | |
526 Verifier::Mode mode = | |
527 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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528 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
0 | 529 } |
530 | |
531 | |
532 // Used exclusively by the shared spaces dump mechanism to prevent | |
533 // classes mapped into the shared regions in new VMs from appearing linked. | |
534 | |
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535 void InstanceKlass::unlink_class() { |
0 | 536 assert(is_linked(), "must be linked"); |
537 _init_state = loaded; | |
538 } | |
539 | |
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540 void InstanceKlass::link_class(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, true, CHECK); |
546 } | |
547 } | |
548 | |
549 // Called to verify that a class can link during initialization, without | |
550 // throwing a VerifyError. | |
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551 bool InstanceKlass::link_class_or_fail(TRAPS) { |
0 | 552 assert(is_loaded(), "must be loaded"); |
553 if (!is_linked()) { | |
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554 HandleMark hm(THREAD); |
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555 instanceKlassHandle this_oop(THREAD, this); |
0 | 556 link_class_impl(this_oop, false, CHECK_false); |
557 } | |
558 return is_linked(); | |
559 } | |
560 | |
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561 bool InstanceKlass::link_class_impl( |
0 | 562 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
563 // check for error state | |
564 if (this_oop->is_in_error_state()) { | |
565 ResourceMark rm(THREAD); | |
566 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
567 this_oop->external_name(), false); | |
568 } | |
569 // return if already verified | |
570 if (this_oop->is_linked()) { | |
571 return true; | |
572 } | |
573 | |
574 // Timing | |
575 // timer handles recursion | |
576 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
577 JavaThread* jt = (JavaThread*)THREAD; | |
578 | |
579 // link super class before linking this class | |
580 instanceKlassHandle super(THREAD, this_oop->super()); | |
581 if (super.not_null()) { | |
582 if (super->is_interface()) { // check if super class is an interface | |
583 ResourceMark rm(THREAD); | |
584 Exceptions::fthrow( | |
585 THREAD_AND_LOCATION, | |
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586 vmSymbols::java_lang_IncompatibleClassChangeError(), |
0 | 587 "class %s has interface %s as super class", |
588 this_oop->external_name(), | |
589 super->external_name() | |
590 ); | |
591 return false; | |
592 } | |
593 | |
594 link_class_impl(super, throw_verifyerror, CHECK_false); | |
595 } | |
596 | |
597 // link all interfaces implemented by this class before linking this class | |
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598 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
0 | 599 int num_interfaces = interfaces->length(); |
600 for (int index = 0; index < num_interfaces; index++) { | |
601 HandleMark hm(THREAD); | |
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602 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
0 | 603 link_class_impl(ih, throw_verifyerror, CHECK_false); |
604 } | |
605 | |
606 // in case the class is linked in the process of linking its superclasses | |
607 if (this_oop->is_linked()) { | |
608 return true; | |
609 } | |
610 | |
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611 // trace only the link time for this klass that includes |
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612 // the verification time |
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613 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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614 ClassLoader::perf_class_link_selftime(), |
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615 ClassLoader::perf_classes_linked(), |
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616 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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617 jt->get_thread_stat()->perf_timers_addr(), |
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618 PerfClassTraceTime::CLASS_LINK); |
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619 |
0 | 620 // verification & rewriting |
621 { | |
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622 volatile oop init_lock = this_oop->init_lock(); |
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623 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 624 // rewritten will have been set if loader constraint error found |
625 // on an earlier link attempt | |
626 // don't verify or rewrite if already rewritten | |
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627 |
0 | 628 if (!this_oop->is_linked()) { |
629 if (!this_oop->is_rewritten()) { | |
630 { | |
631 // Timer includes any side effects of class verification (resolution, | |
632 // etc), but not recursive entry into verify_code(). | |
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633 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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634 ClassLoader::perf_class_verify_selftime(), |
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635 ClassLoader::perf_classes_verified(), |
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636 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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637 jt->get_thread_stat()->perf_timers_addr(), |
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638 PerfClassTraceTime::CLASS_VERIFY); |
0 | 639 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
640 if (!verify_ok) { | |
641 return false; | |
642 } | |
643 } | |
644 | |
645 // Just in case a side-effect of verify linked this class already | |
646 // (which can sometimes happen since the verifier loads classes | |
647 // using custom class loaders, which are free to initialize things) | |
648 if (this_oop->is_linked()) { | |
649 return true; | |
650 } | |
651 | |
652 // also sets rewritten | |
653 this_oop->rewrite_class(CHECK_false); | |
654 } | |
655 | |
3748 | 656 // relocate jsrs and link methods after they are all rewritten |
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657 this_oop->link_methods(CHECK_false); |
3748 | 658 |
0 | 659 // Initialize the vtable and interface table after |
660 // methods have been rewritten since rewrite may | |
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661 // fabricate new Method*s. |
0 | 662 // also does loader constraint checking |
663 if (!this_oop()->is_shared()) { | |
664 ResourceMark rm(THREAD); | |
665 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
666 this_oop->itable()->initialize_itable(true, CHECK_false); | |
667 } | |
668 #ifdef ASSERT | |
669 else { | |
670 ResourceMark rm(THREAD); | |
671 this_oop->vtable()->verify(tty, true); | |
672 // In case itable verification is ever added. | |
673 // this_oop->itable()->verify(tty, true); | |
674 } | |
675 #endif | |
676 this_oop->set_init_state(linked); | |
677 if (JvmtiExport::should_post_class_prepare()) { | |
678 Thread *thread = THREAD; | |
679 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
680 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
681 } | |
682 } | |
683 } | |
684 return true; | |
685 } | |
686 | |
687 | |
688 // Rewrite the byte codes of all of the methods of a class. | |
689 // The rewriter must be called exactly once. Rewriting must happen after | |
690 // verification but before the first method of the class is executed. | |
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691 void InstanceKlass::rewrite_class(TRAPS) { |
0 | 692 assert(is_loaded(), "must be loaded"); |
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693 instanceKlassHandle this_oop(THREAD, this); |
0 | 694 if (this_oop->is_rewritten()) { |
695 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
696 return; | |
697 } | |
3748 | 698 Rewriter::rewrite(this_oop, CHECK); |
0 | 699 this_oop->set_rewritten(); |
700 } | |
701 | |
3748 | 702 // Now relocate and link method entry points after class is rewritten. |
703 // This is outside is_rewritten flag. In case of an exception, it can be | |
704 // executed more than once. | |
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705 void InstanceKlass::link_methods(TRAPS) { |
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706 int len = methods()->length(); |
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707 for (int i = len-1; i >= 0; i--) { |
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708 methodHandle m(THREAD, methods()->at(i)); |
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709 |
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710 // Set up method entry points for compiler and interpreter . |
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711 m->link_method(m, CHECK); |
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712 |
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713 // This is for JVMTI and unrelated to relocator but the last thing we do |
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714 #ifdef ASSERT |
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715 if (StressMethodComparator) { |
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716 ResourceMark rm(THREAD); |
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717 static int nmc = 0; |
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718 for (int j = i; j >= 0 && j >= i-4; j--) { |
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719 if ((++nmc % 1000) == 0) tty->print_cr("Have run MethodComparator %d times...", nmc); |
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720 bool z = MethodComparator::methods_EMCP(m(), |
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721 methods()->at(j)); |
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722 if (j == i && !z) { |
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723 tty->print("MethodComparator FAIL: "); m->print(); m->print_codes(); |
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724 assert(z, "method must compare equal to itself"); |
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725 } |
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726 } |
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727 } |
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728 #endif //ASSERT |
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729 } |
3748 | 730 } |
731 | |
0 | 732 |
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733 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
0 | 734 // Make sure klass is linked (verified) before initialization |
735 // A class could already be verified, since it has been reflected upon. | |
736 this_oop->link_class(CHECK); | |
737 | |
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738 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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739 |
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740 bool wait = false; |
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741 |
0 | 742 // refer to the JVM book page 47 for description of steps |
743 // Step 1 | |
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744 { |
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745 volatile oop init_lock = this_oop->init_lock(); |
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746 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 747 |
748 Thread *self = THREAD; // it's passed the current thread | |
749 | |
750 // Step 2 | |
751 // If we were to use wait() instead of waitInterruptibly() then | |
752 // we might end up throwing IE from link/symbol resolution sites | |
753 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
754 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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755 wait = true; |
0 | 756 ol.waitUninterruptibly(CHECK); |
757 } | |
758 | |
759 // Step 3 | |
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760 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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761 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 762 return; |
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763 } |
0 | 764 |
765 // Step 4 | |
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766 if (this_oop->is_initialized()) { |
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767 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 768 return; |
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769 } |
0 | 770 |
771 // Step 5 | |
772 if (this_oop->is_in_error_state()) { | |
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773 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 774 ResourceMark rm(THREAD); |
775 const char* desc = "Could not initialize class "; | |
776 const char* className = this_oop->external_name(); | |
777 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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778 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 779 if (NULL == message) { |
780 // Out of memory: can't create detailed error message | |
781 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
782 } else { | |
783 jio_snprintf(message, msglen, "%s%s", desc, className); | |
784 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
785 } | |
786 } | |
787 | |
788 // Step 6 | |
789 this_oop->set_init_state(being_initialized); | |
790 this_oop->set_init_thread(self); | |
791 } | |
792 | |
793 // Step 7 | |
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794 Klass* super_klass = this_oop->super(); |
6983 | 795 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
796 super_klass->initialize(THREAD); | |
0 | 797 |
798 if (HAS_PENDING_EXCEPTION) { | |
799 Handle e(THREAD, PENDING_EXCEPTION); | |
800 CLEAR_PENDING_EXCEPTION; | |
801 { | |
802 EXCEPTION_MARK; | |
803 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
804 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
805 } | |
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806 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 807 THROW_OOP(e()); |
808 } | |
809 } | |
810 | |
6934 | 811 if (this_oop->has_default_methods()) { |
812 // Step 7.5: initialize any interfaces which have default methods | |
813 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
814 Klass* iface = this_oop->local_interfaces()->at(i); | |
815 InstanceKlass* ik = InstanceKlass::cast(iface); | |
816 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
817 ik->initialize(THREAD); | |
818 | |
819 if (HAS_PENDING_EXCEPTION) { | |
820 Handle e(THREAD, PENDING_EXCEPTION); | |
821 CLEAR_PENDING_EXCEPTION; | |
822 { | |
823 EXCEPTION_MARK; | |
824 // Locks object, set state, and notify all waiting threads | |
825 this_oop->set_initialization_state_and_notify( | |
826 initialization_error, THREAD); | |
827 | |
828 // ignore any exception thrown, superclass initialization error is | |
829 // thrown below | |
830 CLEAR_PENDING_EXCEPTION; | |
831 } | |
832 DTRACE_CLASSINIT_PROBE_WAIT( | |
833 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
834 THROW_OOP(e()); | |
835 } | |
836 } | |
837 } | |
838 } | |
839 | |
0 | 840 // Step 8 |
841 { | |
842 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
843 JavaThread* jt = (JavaThread*)THREAD; | |
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844 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 845 // Timer includes any side effects of class initialization (resolution, |
846 // etc), but not recursive entry into call_class_initializer(). | |
875
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847 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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848 ClassLoader::perf_class_init_selftime(), |
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849 ClassLoader::perf_classes_inited(), |
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850 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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851 jt->get_thread_stat()->perf_timers_addr(), |
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852 PerfClassTraceTime::CLASS_CLINIT); |
0 | 853 this_oop->call_class_initializer(THREAD); |
854 } | |
855 | |
856 // Step 9 | |
857 if (!HAS_PENDING_EXCEPTION) { | |
858 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
859 { ResourceMark rm(THREAD); | |
860 debug_only(this_oop->vtable()->verify(tty, true);) | |
861 } | |
862 } | |
863 else { | |
864 // Step 10 and 11 | |
865 Handle e(THREAD, PENDING_EXCEPTION); | |
866 CLEAR_PENDING_EXCEPTION; | |
867 { | |
868 EXCEPTION_MARK; | |
869 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
870 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
871 } | |
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872 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
1142 | 873 if (e->is_a(SystemDictionary::Error_klass())) { |
0 | 874 THROW_OOP(e()); |
875 } else { | |
876 JavaCallArguments args(e); | |
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877 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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878 vmSymbols::throwable_void_signature(), |
0 | 879 &args); |
880 } | |
881 } | |
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882 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 883 } |
884 | |
885 | |
886 // Note: implementation moved to static method to expose the this pointer. | |
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887 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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888 instanceKlassHandle kh(THREAD, this); |
0 | 889 set_initialization_state_and_notify_impl(kh, state, CHECK); |
890 } | |
891 | |
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892 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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893 volatile oop init_lock = this_oop->init_lock(); |
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894 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 895 this_oop->set_init_state(state); |
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896 this_oop->fence_and_clear_init_lock(); |
0 | 897 ol.notify_all(CHECK); |
898 } | |
899 | |
5998
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900 // The embedded _implementor field can only record one implementor. |
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901 // When there are more than one implementors, the _implementor field |
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902 // is set to the interface Klass* itself. Following are the possible |
5998
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903 // values for the _implementor field: |
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904 // NULL - no implementor |
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905 // implementor Klass* - one implementor |
5998
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906 // self - more than one implementor |
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907 // |
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908 // The _implementor field only exists for interfaces. |
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909 void InstanceKlass::add_implementor(Klass* k) { |
0 | 910 assert(Compile_lock->owned_by_self(), ""); |
5998
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911 assert(is_interface(), "not interface"); |
0 | 912 // Filter out my subinterfaces. |
913 // (Note: Interfaces are never on the subklass list.) | |
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914 if (InstanceKlass::cast(k)->is_interface()) return; |
0 | 915 |
916 // Filter out subclasses whose supers already implement me. | |
917 // (Note: CHA must walk subclasses of direct implementors | |
918 // in order to locate indirect implementors.) | |
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919 Klass* sk = InstanceKlass::cast(k)->super(); |
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920 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
0 | 921 // We only need to check one immediate superclass, since the |
922 // implements_interface query looks at transitive_interfaces. | |
923 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
924 return; | |
925 | |
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926 Klass* ik = implementor(); |
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927 if (ik == NULL) { |
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928 set_implementor(k); |
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929 } else if (ik != this) { |
5998
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930 // There is already an implementor. Use itself as an indicator of |
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931 // more than one implementors. |
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932 set_implementor(this); |
0 | 933 } |
934 | |
935 // The implementor also implements the transitive_interfaces | |
936 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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937 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
0 | 938 } |
939 } | |
940 | |
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941 void InstanceKlass::init_implementor() { |
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942 if (is_interface()) { |
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943 set_implementor(NULL); |
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944 } |
0 | 945 } |
946 | |
947 | |
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948 void InstanceKlass::process_interfaces(Thread *thread) { |
0 | 949 // link this class into the implementors list of every interface it implements |
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950 Klass* this_as_klass_oop = this; |
0 | 951 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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952 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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953 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
0 | 954 assert(interf->is_interface(), "expected interface"); |
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955 interf->add_implementor(this_as_klass_oop); |
0 | 956 } |
957 } | |
958 | |
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959 bool InstanceKlass::can_be_primary_super_slow() const { |
0 | 960 if (is_interface()) |
961 return false; | |
962 else | |
963 return Klass::can_be_primary_super_slow(); | |
964 } | |
965 | |
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966 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
0 | 967 // The secondaries are the implemented interfaces. |
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968 InstanceKlass* ik = InstanceKlass::cast(this); |
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969 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
0 | 970 int num_secondaries = num_extra_slots + interfaces->length(); |
971 if (num_secondaries == 0) { | |
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972 // Must share this for correct bootstrapping! |
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973 set_secondary_supers(Universe::the_empty_klass_array()); |
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974 return NULL; |
0 | 975 } else if (num_extra_slots == 0) { |
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976 // The secondary super list is exactly the same as the transitive interfaces. |
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977 // Redefine classes has to be careful not to delete this! |
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978 set_secondary_supers(interfaces); |
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979 return NULL; |
0 | 980 } else { |
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981 // Copy transitive interfaces to a temporary growable array to be constructed |
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982 // into the secondary super list with extra slots. |
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983 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
0 | 984 for (int i = 0; i < interfaces->length(); i++) { |
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985 secondaries->push(interfaces->at(i)); |
0 | 986 } |
987 return secondaries; | |
988 } | |
989 } | |
990 | |
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991 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
6983 | 992 if (k->is_interface()) { |
0 | 993 return implements_interface(k); |
994 } else { | |
995 return Klass::compute_is_subtype_of(k); | |
996 } | |
997 } | |
998 | |
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999 bool InstanceKlass::implements_interface(Klass* k) const { |
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1000 if (this == k) return true; |
6983 | 1001 assert(k->is_interface(), "should be an interface class"); |
0 | 1002 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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1003 if (transitive_interfaces()->at(i) == k) { |
0 | 1004 return true; |
1005 } | |
1006 } | |
1007 return false; | |
1008 } | |
1009 | |
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1010 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
0 | 1011 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
1012 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
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1013 report_java_out_of_memory("Requested array size exceeds VM limit"); |
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1014 JvmtiExport::post_array_size_exhausted(); |
0 | 1015 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
1016 } | |
1017 int size = objArrayOopDesc::object_size(length); | |
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1018 Klass* ak = array_klass(n, CHECK_NULL); |
0 | 1019 KlassHandle h_ak (THREAD, ak); |
1020 objArrayOop o = | |
1021 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
1022 return o; | |
1023 } | |
1024 | |
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1025 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
0 | 1026 if (TraceFinalizerRegistration) { |
1027 tty->print("Registered "); | |
1028 i->print_value_on(tty); | |
1029 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
1030 } | |
1031 instanceHandle h_i(THREAD, i); | |
1032 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
1033 JavaValue result(T_VOID); | |
1034 JavaCallArguments args(h_i); | |
1035 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
1036 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
1037 return h_i(); | |
1038 } | |
1039 | |
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1040 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
0 | 1041 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
1042 int size = size_helper(); // Query before forming handle. | |
1043 | |
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1044 KlassHandle h_k(THREAD, this); |
0 | 1045 |
1046 instanceOop i; | |
1047 | |
1048 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
1049 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
1050 i = register_finalizer(i, CHECK_NULL); | |
1051 } | |
1052 return i; | |
1053 } | |
1054 | |
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1055 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
0 | 1056 if (is_interface() || is_abstract()) { |
1057 ResourceMark rm(THREAD); | |
1058 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
1059 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
1060 } | |
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1061 if (this == SystemDictionary::Class_klass()) { |
0 | 1062 ResourceMark rm(THREAD); |
1063 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
1064 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
1065 } | |
1066 } | |
1067 | |
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1068 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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1069 instanceKlassHandle this_oop(THREAD, this); |
0 | 1070 return array_klass_impl(this_oop, or_null, n, THREAD); |
1071 } | |
1072 | |
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1073 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
0 | 1074 if (this_oop->array_klasses() == NULL) { |
1075 if (or_null) return NULL; | |
1076 | |
1077 ResourceMark rm; | |
1078 JavaThread *jt = (JavaThread *)THREAD; | |
1079 { | |
1080 // Atomic creation of array_klasses | |
1081 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
1082 MutexLocker ma(MultiArray_lock, THREAD); | |
1083 | |
1084 // Check if update has already taken place | |
1085 if (this_oop->array_klasses() == NULL) { | |
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1086 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
0 | 1087 this_oop->set_array_klasses(k); |
1088 } | |
1089 } | |
1090 } | |
1091 // _this will always be set at this point | |
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1092 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
0 | 1093 if (or_null) { |
1094 return oak->array_klass_or_null(n); | |
1095 } | |
1096 return oak->array_klass(n, CHECK_NULL); | |
1097 } | |
1098 | |
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1099 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
0 | 1100 return array_klass_impl(or_null, 1, THREAD); |
1101 } | |
1102 | |
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1103 void InstanceKlass::call_class_initializer(TRAPS) { |
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1104 instanceKlassHandle ik (THREAD, this); |
0 | 1105 call_class_initializer_impl(ik, THREAD); |
1106 } | |
1107 | |
1108 static int call_class_initializer_impl_counter = 0; // for debugging | |
1109 | |
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1110 Method* InstanceKlass::class_initializer() { |
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1111 Method* clinit = find_method( |
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1112 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1113 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1114 return clinit; |
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1115 } |
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1116 return NULL; |
0 | 1117 } |
1118 | |
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1119 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1120 if (ReplayCompiles && |
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1121 (ReplaySuppressInitializers == 1 || |
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1122 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1123 // Hide the existence of the initializer for the purpose of replaying the compile |
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1124 return; |
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1125 } |
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1126 |
0 | 1127 methodHandle h_method(THREAD, this_oop->class_initializer()); |
1128 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
1129 if (TraceClassInitialization) { | |
1130 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
1131 this_oop->name()->print_value(); | |
1132 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
1133 } | |
1134 if (h_method() != NULL) { | |
1135 JavaCallArguments args; // No arguments | |
1136 JavaValue result(T_VOID); | |
1137 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
1138 } | |
1139 } | |
1140 | |
1141 | |
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1142 void InstanceKlass::mask_for(methodHandle method, int bci, |
0 | 1143 InterpreterOopMap* entry_for) { |
1144 // Dirty read, then double-check under a lock. | |
1145 if (_oop_map_cache == NULL) { | |
1146 // Otherwise, allocate a new one. | |
1147 MutexLocker x(OopMapCacheAlloc_lock); | |
1148 // First time use. Allocate a cache in C heap | |
1149 if (_oop_map_cache == NULL) { | |
1150 _oop_map_cache = new OopMapCache(); | |
1151 } | |
1152 } | |
1153 // _oop_map_cache is constant after init; lookup below does is own locking. | |
1154 _oop_map_cache->lookup(method, bci, entry_for); | |
1155 } | |
1156 | |
1157 | |
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1158 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1159 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1160 Symbol* f_name = fs.name(); |
1161 Symbol* f_sig = fs.signature(); | |
0 | 1162 if (f_name == name && f_sig == sig) { |
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1163 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1164 return true; |
1165 } | |
1166 } | |
1167 return false; | |
1168 } | |
1169 | |
1170 | |
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1171 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1172 const int n = local_interfaces()->length(); |
1173 for (int i = 0; i < n; i++) { | |
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1174 Klass* intf1 = local_interfaces()->at(i); |
6983 | 1175 assert(intf1->is_interface(), "just checking type"); |
0 | 1176 // search for field in current interface |
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1177 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
0 | 1178 assert(fd->is_static(), "interface field must be static"); |
1179 return intf1; | |
1180 } | |
1181 // search for field in direct superinterfaces | |
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1182 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
0 | 1183 if (intf2 != NULL) return intf2; |
1184 } | |
1185 // otherwise field lookup fails | |
1186 return NULL; | |
1187 } | |
1188 | |
1189 | |
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1190 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1191 // search order according to newest JVM spec (5.4.3.2, p.167). |
1192 // 1) search for field in current klass | |
1193 if (find_local_field(name, sig, fd)) { | |
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1194 return const_cast<InstanceKlass*>(this); |
0 | 1195 } |
1196 // 2) search for field recursively in direct superinterfaces | |
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1197 { Klass* intf = find_interface_field(name, sig, fd); |
0 | 1198 if (intf != NULL) return intf; |
1199 } | |
1200 // 3) apply field lookup recursively if superclass exists | |
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1201 { Klass* supr = super(); |
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1202 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
0 | 1203 } |
1204 // 4) otherwise field lookup fails | |
1205 return NULL; | |
1206 } | |
1207 | |
1208 | |
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1209 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
0 | 1210 // search order according to newest JVM spec (5.4.3.2, p.167). |
1211 // 1) search for field in current klass | |
1212 if (find_local_field(name, sig, fd)) { | |
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1213 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
0 | 1214 } |
1215 // 2) search for field recursively in direct superinterfaces | |
1216 if (is_static) { | |
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1217 Klass* intf = find_interface_field(name, sig, fd); |
0 | 1218 if (intf != NULL) return intf; |
1219 } | |
1220 // 3) apply field lookup recursively if superclass exists | |
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1221 { Klass* supr = super(); |
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1222 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
0 | 1223 } |
1224 // 4) otherwise field lookup fails | |
1225 return NULL; | |
1226 } | |
1227 | |
1228 | |
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1229 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1230 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1231 if (fs.offset() == offset) { |
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1232 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1233 if (fd->is_static() == is_static) return true; |
1234 } | |
1235 } | |
1236 return false; | |
1237 } | |
1238 | |
1239 | |
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1240 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1241 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1242 while (klass != NULL) { |
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1243 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
0 | 1244 return true; |
1245 } | |
6983 | 1246 klass = klass->super(); |
0 | 1247 } |
1248 return false; | |
1249 } | |
1250 | |
1251 | |
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1252 void InstanceKlass::methods_do(void f(Method* method)) { |
0 | 1253 int len = methods()->length(); |
1254 for (int index = 0; index < len; index++) { | |
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1255 Method* m = methods()->at(index); |
0 | 1256 assert(m->is_method(), "must be method"); |
1257 f(m); | |
1258 } | |
1259 } | |
1260 | |
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1261 |
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1262 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
3938 | 1263 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
1264 if (fs.access_flags().is_static()) { | |
1265 fieldDescriptor fd; | |
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1266 fd.initialize(this, fs.index()); |
3938 | 1267 cl->do_field(&fd); |
1268 } | |
0 | 1269 } |
1270 } | |
1271 | |
1272 | |
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1273 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1274 instanceKlassHandle h_this(THREAD, this); |
0 | 1275 do_local_static_fields_impl(h_this, f, CHECK); |
1276 } | |
1277 | |
1278 | |
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1279 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
3938 | 1280 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
1281 if (fs.access_flags().is_static()) { | |
1282 fieldDescriptor fd; | |
1283 fd.initialize(this_oop(), fs.index()); | |
1284 f(&fd, CHECK); | |
1285 } | |
0 | 1286 } |
1287 } | |
1288 | |
1289 | |
44
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1290 static int compare_fields_by_offset(int* a, int* b) { |
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1291 return a[0] - b[0]; |
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1292 } |
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1293 |
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1294 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1295 InstanceKlass* super = superklass(); |
0 | 1296 if (super != NULL) { |
1297 super->do_nonstatic_fields(cl); | |
1298 } | |
44
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1299 fieldDescriptor fd; |
3938 | 1300 int length = java_fields_count(); |
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1301 // In DebugInfo nonstatic fields are sorted by offset. |
6197 | 1302 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
44
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1303 int j = 0; |
3938 | 1304 for (int i = 0; i < length; i += 1) { |
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1305 fd.initialize(this, i); |
44
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1306 if (!fd.is_static()) { |
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1307 fields_sorted[j + 0] = fd.offset(); |
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1308 fields_sorted[j + 1] = i; |
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1309 j += 2; |
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1310 } |
0 | 1311 } |
44
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1312 if (j > 0) { |
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1313 length = j; |
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1314 // _sort_Fn is defined in growableArray.hpp. |
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1315 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1316 for (int i = 0; i < length; i += 2) { |
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1317 fd.initialize(this, fields_sorted[i + 1]); |
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1318 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1319 cl->do_field(&fd); |
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1320 } |
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1321 } |
6197 | 1322 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
0 | 1323 } |
1324 | |
1325 | |
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1326 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1327 if (array_klasses() != NULL) |
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1328 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1329 } |
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1330 |
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1331 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
0 | 1332 if (array_klasses() != NULL) |
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1333 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
0 | 1334 } |
1335 | |
1336 | |
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1337 void InstanceKlass::with_array_klasses_do(void f(Klass* k)) { |
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1338 f(this); |
0 | 1339 array_klasses_do(f); |
1340 } | |
1341 | |
1342 #ifdef ASSERT | |
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1343 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
0 | 1344 int len = methods->length(); |
1345 for (int index = 0; index < len; index++) { | |
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1346 Method* m = methods->at(index); |
0 | 1347 assert(m->is_method(), "must be method"); |
1348 if (m->signature() == signature && m->name() == name) { | |
1349 return index; | |
1350 } | |
1351 } | |
1352 return -1; | |
1353 } | |
1354 #endif | |
1355 | |
6934 | 1356 static int binary_search(Array<Method*>* methods, Symbol* name) { |
0 | 1357 int len = methods->length(); |
1358 // methods are sorted, so do binary search | |
1359 int l = 0; | |
1360 int h = len - 1; | |
1361 while (l <= h) { | |
1362 int mid = (l + h) >> 1; | |
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1363 Method* m = methods->at(mid); |
0 | 1364 assert(m->is_method(), "must be method"); |
1365 int res = m->name()->fast_compare(name); | |
1366 if (res == 0) { | |
6934 | 1367 return mid; |
0 | 1368 } else if (res < 0) { |
1369 l = mid + 1; | |
1370 } else { | |
1371 h = mid - 1; | |
1372 } | |
1373 } | |
6934 | 1374 return -1; |
1375 } | |
1376 | |
1377 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
1378 return InstanceKlass::find_method(methods(), name, signature); | |
1379 } | |
1380 | |
1381 Method* InstanceKlass::find_method( | |
1382 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
1383 int hit = binary_search(methods, name); | |
1384 if (hit != -1) { | |
1385 Method* m = methods->at(hit); | |
1386 // Do linear search to find matching signature. First, quick check | |
1387 // for common case | |
1388 if (m->signature() == signature) return m; | |
1389 // search downwards through overloaded methods | |
1390 int i; | |
1391 for (i = hit - 1; i >= 0; --i) { | |
1392 Method* m = methods->at(i); | |
1393 assert(m->is_method(), "must be method"); | |
1394 if (m->name() != name) break; | |
1395 if (m->signature() == signature) return m; | |
1396 } | |
1397 // search upwards | |
1398 for (i = hit + 1; i < methods->length(); ++i) { | |
1399 Method* m = methods->at(i); | |
1400 assert(m->is_method(), "must be method"); | |
1401 if (m->name() != name) break; | |
1402 if (m->signature() == signature) return m; | |
1403 } | |
1404 // not found | |
0 | 1405 #ifdef ASSERT |
6934 | 1406 int index = linear_search(methods, name, signature); |
1407 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
0 | 1408 #endif |
6934 | 1409 } |
0 | 1410 return NULL; |
1411 } | |
1412 | |
6934 | 1413 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
1414 return find_method_by_name(methods(), name, end); | |
1415 } | |
1416 | |
1417 int InstanceKlass::find_method_by_name( | |
1418 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
1419 assert(end_ptr != NULL, "just checking"); | |
1420 int start = binary_search(methods, name); | |
1421 int end = start + 1; | |
1422 if (start != -1) { | |
1423 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
1424 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
1425 *end_ptr = end; | |
1426 return start; | |
1427 } | |
1428 return -1; | |
1429 } | |
1430 | |
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1431 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1432 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1433 while (klass != NULL) { |
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1434 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
0 | 1435 if (method != NULL) return method; |
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1436 klass = InstanceKlass::cast(klass)->super(); |
0 | 1437 } |
1438 return NULL; | |
1439 } | |
1440 | |
1441 // lookup a method in all the interfaces that this class implements | |
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1442 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
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1443 Symbol* signature) const { |
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1444 Array<Klass*>* all_ifs = transitive_interfaces(); |
0 | 1445 int num_ifs = all_ifs->length(); |
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1446 InstanceKlass *ik = NULL; |
0 | 1447 for (int i = 0; i < num_ifs; i++) { |
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1448 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1449 Method* m = ik->lookup_method(name, signature); |
0 | 1450 if (m != NULL) { |
1451 return m; | |
1452 } | |
1453 } | |
1454 return NULL; | |
1455 } | |
1456 | |
1457 /* jni_id_for_impl for jfieldIds only */ | |
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1458 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
0 | 1459 MutexLocker ml(JfieldIdCreation_lock); |
1460 // Retry lookup after we got the lock | |
1461 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
1462 if (probe == NULL) { | |
1463 // Slow case, allocate new static field identifier | |
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1464 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
0 | 1465 this_oop->set_jni_ids(probe); |
1466 } | |
1467 return probe; | |
1468 } | |
1469 | |
1470 | |
1471 /* jni_id_for for jfieldIds only */ | |
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1472 JNIid* InstanceKlass::jni_id_for(int offset) { |
0 | 1473 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
1474 if (probe == NULL) { | |
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1475 probe = jni_id_for_impl(this, offset); |
0 | 1476 } |
1477 return probe; | |
1478 } | |
1479 | |
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1480 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1481 Array<jushort>* inner_class_list = inner_classes(); |
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1482 if (inner_class_list == NULL) { |
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1483 return 0; |
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1484 } |
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1485 int length = inner_class_list->length(); |
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1486 if (length % inner_class_next_offset == 0) { |
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1487 return 0; |
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1488 } else { |
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1489 int index = length - enclosing_method_attribute_size; |
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1490 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1491 return inner_class_list->at(index + offset); |
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1492 } |
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1493 } |
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1494 |
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1495 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
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1496 u2 method_index) { |
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1497 Array<jushort>* inner_class_list = inner_classes(); |
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1498 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1499 int length = inner_class_list->length(); |
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1500 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1501 int index = length - enclosing_method_attribute_size; |
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1502 inner_class_list->at_put( |
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1503 index + enclosing_method_class_index_offset, class_index); |
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1504 inner_class_list->at_put( |
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1505 index + enclosing_method_method_index_offset, method_index); |
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1506 } |
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1507 } |
0 | 1508 |
1509 // Lookup or create a jmethodID. | |
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1510 // This code is called by the VMThread and JavaThreads so the |
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1511 // locking has to be done very carefully to avoid deadlocks |
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1512 // and/or other cache consistency problems. |
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1513 // |
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1514 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
0 | 1515 size_t idnum = (size_t)method_h->method_idnum(); |
1516 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
1517 size_t length = 0; | |
1518 jmethodID id = NULL; | |
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1519 |
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1520 // We use a double-check locking idiom here because this cache is |
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1521 // performance sensitive. In the normal system, this cache only |
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1522 // transitions from NULL to non-NULL which is safe because we use |
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1523 // release_set_methods_jmethod_ids() to advertise the new cache. |
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1524 // A partially constructed cache should never be seen by a racing |
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1525 // thread. We also use release_store_ptr() to save a new jmethodID |
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1526 // in the cache so a partially constructed jmethodID should never be |
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1527 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1528 // lock, but cache writes of a new jmethodID requires uniqueness and |
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1529 // creation of the cache itself requires no leaks so a lock is |
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1530 // generally acquired in those two cases. |
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1531 // |
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1532 // If the RedefineClasses() API has been used, then this cache can |
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1533 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1534 // Cache creation requires no leaks and we require safety between all |
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1535 // cache accesses and freeing of the old cache so a lock is generally |
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1536 // acquired when the RedefineClasses() API has been used. |
0 | 1537 |
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1538 if (jmeths != NULL) { |
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1539 // the cache already exists |
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1540 if (!ik_h->idnum_can_increment()) { |
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1541 // the cache can't grow so we can just get the current values |
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1542 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1543 } else { |
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1544 // cache can grow so we have to be more careful |
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1545 if (Threads::number_of_threads() == 0 || |
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1546 SafepointSynchronize::is_at_safepoint()) { |
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1547 // we're single threaded or at a safepoint - no locking needed |
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1548 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1549 } else { |
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1550 MutexLocker ml(JmethodIdCreation_lock); |
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1551 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1552 } |
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1553 } |
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1554 } |
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1555 // implied else: |
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1556 // we need to allocate a cache so default length and id values are good |
0 | 1557 |
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1558 if (jmeths == NULL || // no cache yet |
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1559 length <= idnum || // cache is too short |
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1560 id == NULL) { // cache doesn't contain entry |
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1561 |
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1562 // This function can be called by the VMThread so we have to do all |
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1563 // things that might block on a safepoint before grabbing the lock. |
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1564 // Otherwise, we can deadlock with the VMThread or have a cache |
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1565 // consistency issue. These vars keep track of what we might have |
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1566 // to free after the lock is dropped. |
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1567 jmethodID to_dealloc_id = NULL; |
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1568 jmethodID* to_dealloc_jmeths = NULL; |
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1569 |
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1570 // may not allocate new_jmeths or use it if we allocate it |
0 | 1571 jmethodID* new_jmeths = NULL; |
1572 if (length <= idnum) { | |
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1573 // allocate a new cache that might be used |
0 | 1574 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
6197 | 1575 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
0 | 1576 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
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1577 // cache size is stored in element[0], other elements offset by one |
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1578 new_jmeths[0] = (jmethodID)size; |
0 | 1579 } |
1580 | |
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1581 // allocate a new jmethodID that might be used |
0 | 1582 jmethodID new_id = NULL; |
1583 if (method_h->is_old() && !method_h->is_obsolete()) { | |
1584 // The method passed in is old (but not obsolete), we need to use the current version | |
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1585 Method* current_method = ik_h->method_with_idnum((int)idnum); |
0 | 1586 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
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1587 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
0 | 1588 } else { |
1589 // It is the current version of the method or an obsolete method, | |
1590 // use the version passed in | |
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1591 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
0 | 1592 } |
1593 | |
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1594 if (Threads::number_of_threads() == 0 || |
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1595 SafepointSynchronize::is_at_safepoint()) { |
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1596 // we're single threaded or at a safepoint - no locking needed |
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1597 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1598 &to_dealloc_id, &to_dealloc_jmeths); |
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1599 } else { |
0 | 1600 MutexLocker ml(JmethodIdCreation_lock); |
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1601 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1602 &to_dealloc_id, &to_dealloc_jmeths); |
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1603 } |
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1604 |
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1605 // The lock has been dropped so we can free resources. |
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1606 // Free up either the old cache or the new cache if we allocated one. |
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1607 if (to_dealloc_jmeths != NULL) { |
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1608 FreeHeap(to_dealloc_jmeths); |
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1609 } |
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1610 // free up the new ID since it wasn't needed |
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1611 if (to_dealloc_id != NULL) { |
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1612 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
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1613 } |
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1614 } |
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1615 return id; |
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1616 } |
0 | 1617 |
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1618 |
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1619 // Common code to fetch the jmethodID from the cache or update the |
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1620 // cache with the new jmethodID. This function should never do anything |
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1621 // that causes the caller to go to a safepoint or we can deadlock with |
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1622 // the VMThread or have cache consistency issues. |
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1623 // |
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1624 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
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1625 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
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1626 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
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1627 jmethodID** to_dealloc_jmeths_p) { |
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1628 assert(new_id != NULL, "sanity check"); |
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1629 assert(to_dealloc_id_p != NULL, "sanity check"); |
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1630 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
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1631 assert(Threads::number_of_threads() == 0 || |
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1632 SafepointSynchronize::is_at_safepoint() || |
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1633 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
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1634 |
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1635 // reacquire the cache - we are locked, single threaded or at a safepoint |
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1636 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
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1637 jmethodID id = NULL; |
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1638 size_t length = 0; |
0 | 1639 |
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1640 if (jmeths == NULL || // no cache yet |
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1641 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
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1642 if (jmeths != NULL) { |
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1643 // copy any existing entries from the old cache |
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1644 for (size_t index = 0; index < length; index++) { |
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1645 new_jmeths[index+1] = jmeths[index+1]; |
0 | 1646 } |
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1647 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
0 | 1648 } |
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1649 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
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1650 } else { |
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1651 // fetch jmethodID (if any) from the existing cache |
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1652 id = jmeths[idnum+1]; |
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1653 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
49
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1654 } |
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1655 if (id == NULL) { |
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1656 // No matching jmethodID in the existing cache or we have a new |
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1657 // cache or we just grew the cache. This cache write is done here |
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1658 // by the first thread to win the foot race because a jmethodID |
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1659 // needs to be unique once it is generally available. |
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1660 id = new_id; |
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1661 |
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1662 // The jmethodID cache can be read while unlocked so we have to |
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1663 // make sure the new jmethodID is complete before installing it |
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1664 // in the cache. |
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1665 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
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1666 } else { |
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1667 *to_dealloc_id_p = new_id; // save new id for later delete |
0 | 1668 } |
1669 return id; | |
1670 } | |
1671 | |
1672 | |
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1673 // Common code to get the jmethodID cache length and the jmethodID |
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1674 // value at index idnum if there is one. |
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1675 // |
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1676 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
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1677 size_t idnum, size_t *length_p, jmethodID* id_p) { |
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1678 assert(cache != NULL, "sanity check"); |
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1679 assert(length_p != NULL, "sanity check"); |
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1680 assert(id_p != NULL, "sanity check"); |
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1681 |
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1682 // cache size is stored in element[0], other elements offset by one |
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1683 *length_p = (size_t)cache[0]; |
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1684 if (*length_p <= idnum) { // cache is too short |
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1685 *id_p = NULL; |
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1686 } else { |
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1687 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1688 } |
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1689 } |
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1690 |
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1691 |
0 | 1692 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
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1693 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
0 | 1694 size_t idnum = (size_t)method->method_idnum(); |
1695 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
1696 size_t length; // length assigned as debugging crumb | |
1697 jmethodID id = NULL; | |
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1698 if (jmeths != NULL && // If there is a cache |
0 | 1699 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
1700 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
1701 } | |
1702 return id; | |
1703 } | |
1704 | |
1705 | |
1706 // Cache an itable index | |
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1707 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
0 | 1708 int* indices = methods_cached_itable_indices_acquire(); |
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1709 int* to_dealloc_indices = NULL; |
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1710 |
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1711 // We use a double-check locking idiom here because this cache is |
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1712 // performance sensitive. In the normal system, this cache only |
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1713 // transitions from NULL to non-NULL which is safe because we use |
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1714 // release_set_methods_cached_itable_indices() to advertise the |
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1715 // new cache. A partially constructed cache should never be seen |
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1716 // by a racing thread. Cache reads and writes proceed without a |
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1717 // lock, but creation of the cache itself requires no leaks so a |
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1718 // lock is generally acquired in that case. |
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1719 // |
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1720 // If the RedefineClasses() API has been used, then this cache can |
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1721 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1722 // Cache creation requires no leaks and we require safety between all |
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1723 // cache accesses and freeing of the old cache so a lock is generally |
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1724 // acquired when the RedefineClasses() API has been used. |
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1725 |
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1726 if (indices == NULL || idnum_can_increment()) { |
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1727 // we need a cache or the cache can grow |
0 | 1728 MutexLocker ml(JNICachedItableIndex_lock); |
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1729 // reacquire the cache to see if another thread already did the work |
0 | 1730 indices = methods_cached_itable_indices_acquire(); |
1731 size_t length = 0; | |
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1732 // cache size is stored in element[0], other elements offset by one |
0 | 1733 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
1734 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
6197 | 1735 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
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1736 new_indices[0] = (int)size; |
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1737 // copy any existing entries |
0 | 1738 size_t i; |
1739 for (i = 0; i < length; i++) { | |
1740 new_indices[i+1] = indices[i+1]; | |
1741 } | |
1742 // Set all the rest to -1 | |
1743 for (i = length; i < size; i++) { | |
1744 new_indices[i+1] = -1; | |
1745 } | |
1746 if (indices != NULL) { | |
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1747 // We have an old cache to delete so save it for after we |
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1748 // drop the lock. |
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1749 to_dealloc_indices = indices; |
0 | 1750 } |
1751 release_set_methods_cached_itable_indices(indices = new_indices); | |
1752 } | |
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1753 |
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1754 if (idnum_can_increment()) { |
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1755 // this cache can grow so we have to write to it safely |
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1756 indices[idnum+1] = index; |
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1757 } |
0 | 1758 } else { |
1759 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1760 } | |
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1761 |
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1762 if (!idnum_can_increment()) { |
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1763 // The cache cannot grow and this JNI itable index value does not |
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1764 // have to be unique like a jmethodID. If there is a race to set it, |
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1765 // it doesn't matter. |
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1766 indices[idnum+1] = index; |
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1767 } |
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1768 |
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1769 if (to_dealloc_indices != NULL) { |
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1770 // we allocated a new cache so free the old one |
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1771 FreeHeap(to_dealloc_indices); |
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1772 } |
0 | 1773 } |
1774 | |
1775 | |
1776 // Retrieve a cached itable index | |
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1777 int InstanceKlass::cached_itable_index(size_t idnum) { |
0 | 1778 int* indices = methods_cached_itable_indices_acquire(); |
1779 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
1780 // indices exist and are long enough, retrieve possible cached | |
1781 return indices[idnum+1]; | |
1782 } | |
1783 return -1; | |
1784 } | |
1785 | |
1786 | |
1787 // | |
1788 // Walk the list of dependent nmethods searching for nmethods which | |
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1789 // are dependent on the changes that were passed in and mark them for |
0 | 1790 // deoptimization. Returns the number of nmethods found. |
1791 // | |
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1792 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
0 | 1793 assert_locked_or_safepoint(CodeCache_lock); |
1794 int found = 0; | |
1795 nmethodBucket* b = _dependencies; | |
1796 while (b != NULL) { | |
1797 nmethod* nm = b->get_nmethod(); | |
1798 // since dependencies aren't removed until an nmethod becomes a zombie, | |
1799 // the dependency list may contain nmethods which aren't alive. | |
1800 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
1801 if (TraceDependencies) { | |
1802 ResourceMark rm; | |
1803 tty->print_cr("Marked for deoptimization"); | |
1804 tty->print_cr(" context = %s", this->external_name()); | |
1805 changes.print(); | |
1806 nm->print(); | |
1807 nm->print_dependencies(); | |
1808 } | |
1809 nm->mark_for_deoptimization(); | |
1810 found++; | |
1811 } | |
1812 b = b->next(); | |
1813 } | |
1814 return found; | |
1815 } | |
1816 | |
1817 | |
1818 // | |
1819 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
1820 // It's possible that an nmethod has multiple dependencies on this klass | |
1821 // so a count is kept for each bucket to guarantee that creation and | |
1822 // deletion of dependencies is consistent. | |
1823 // | |
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1824 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
0 | 1825 assert_locked_or_safepoint(CodeCache_lock); |
1826 nmethodBucket* b = _dependencies; | |
1827 nmethodBucket* last = NULL; | |
1828 while (b != NULL) { | |
1829 if (nm == b->get_nmethod()) { | |
1830 b->increment(); | |
1831 return; | |
1832 } | |
1833 b = b->next(); | |
1834 } | |
1835 _dependencies = new nmethodBucket(nm, _dependencies); | |
1836 } | |
1837 | |
1838 | |
1839 // | |
1840 // Decrement count of the nmethod in the dependency list and remove | |
1841 // the bucket competely when the count goes to 0. This method must | |
1842 // find a corresponding bucket otherwise there's a bug in the | |
1843 // recording of dependecies. | |
1844 // | |
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1845 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
0 | 1846 assert_locked_or_safepoint(CodeCache_lock); |
1847 nmethodBucket* b = _dependencies; | |
1848 nmethodBucket* last = NULL; | |
1849 while (b != NULL) { | |
1850 if (nm == b->get_nmethod()) { | |
1851 if (b->decrement() == 0) { | |
1852 if (last == NULL) { | |
1853 _dependencies = b->next(); | |
1854 } else { | |
1855 last->set_next(b->next()); | |
1856 } | |
1857 delete b; | |
1858 } | |
1859 return; | |
1860 } | |
1861 last = b; | |
1862 b = b->next(); | |
1863 } | |
1864 #ifdef ASSERT | |
1865 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
1866 nm->print(); | |
1867 #endif // ASSERT | |
1868 ShouldNotReachHere(); | |
1869 } | |
1870 | |
1871 | |
1872 #ifndef PRODUCT | |
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1873 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
0 | 1874 nmethodBucket* b = _dependencies; |
1875 int idx = 0; | |
1876 while (b != NULL) { | |
1877 nmethod* nm = b->get_nmethod(); | |
1878 tty->print("[%d] count=%d { ", idx++, b->count()); | |
1879 if (!verbose) { | |
1880 nm->print_on(tty, "nmethod"); | |
1881 tty->print_cr(" } "); | |
1882 } else { | |
1883 nm->print(); | |
1884 nm->print_dependencies(); | |
1885 tty->print_cr("--- } "); | |
1886 } | |
1887 b = b->next(); | |
1888 } | |
1889 } | |
1890 | |
1891 | |
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1892 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
0 | 1893 nmethodBucket* b = _dependencies; |
1894 while (b != NULL) { | |
1895 if (nm == b->get_nmethod()) { | |
1896 return true; | |
1897 } | |
1898 b = b->next(); | |
1899 } | |
1900 return false; | |
1901 } | |
1902 #endif //PRODUCT | |
1903 | |
1904 | |
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1905 // Garbage collection |
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1906 |
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1907 void InstanceKlass::oops_do(OopClosure* cl) { |
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1908 Klass::oops_do(cl); |
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1909 |
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1910 cl->do_oop(adr_protection_domain()); |
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1911 cl->do_oop(adr_signers()); |
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1912 cl->do_oop(adr_init_lock()); |
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1913 |
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1914 // Don't walk the arrays since they are walked from the ClassLoaderData objects. |
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1915 } |
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1916 |
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1917 #ifdef ASSERT |
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1918 template <class T> void assert_is_in(T *p) { |
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1919 T heap_oop = oopDesc::load_heap_oop(p); |
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1920 if (!oopDesc::is_null(heap_oop)) { |
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1921 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1922 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1923 } |
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1924 } |
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1925 template <class T> void assert_is_in_closed_subset(T *p) { |
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1926 T heap_oop = oopDesc::load_heap_oop(p); |
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1927 if (!oopDesc::is_null(heap_oop)) { |
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1928 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1929 assert(Universe::heap()->is_in_closed_subset(o), |
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1930 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
113
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1931 } |
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1932 } |
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1933 template <class T> void assert_is_in_reserved(T *p) { |
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1934 T heap_oop = oopDesc::load_heap_oop(p); |
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1935 if (!oopDesc::is_null(heap_oop)) { |
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1936 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1937 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1938 } |
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1939 } |
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1940 template <class T> void assert_nothing(T *p) {} |
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1941 |
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1942 #else |
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1943 template <class T> void assert_is_in(T *p) {} |
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1944 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1945 template <class T> void assert_is_in_reserved(T *p) {} |
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1946 template <class T> void assert_nothing(T *p) {} |
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1947 #endif // ASSERT |
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1948 |
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1949 // |
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1950 // Macros that iterate over areas of oops which are specialized on type of |
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1951 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1952 // |
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1953 // Parameters are: |
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1954 // T - type of oop to point to (either oop or narrowOop) |
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1955 // start_p - starting pointer for region to iterate over |
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1956 // count - number of oops or narrowOops to iterate over |
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1957 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1958 // makes it more efficient to put in a macro rather than making |
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1959 // it a template function) |
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1960 // assert_fn - assert function which is template function because performance |
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1961 // doesn't matter when enabled. |
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1962 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1963 T, start_p, count, do_oop, \ |
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1964 assert_fn) \ |
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1965 { \ |
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1966 T* p = (T*)(start_p); \ |
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1967 T* const end = p + (count); \ |
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1968 while (p < end) { \ |
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1969 (assert_fn)(p); \ |
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1970 do_oop; \ |
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1971 ++p; \ |
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1972 } \ |
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1973 } |
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1974 |
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1975 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1976 T, start_p, count, do_oop, \ |
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1977 assert_fn) \ |
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1978 { \ |
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1979 T* const start = (T*)(start_p); \ |
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1980 T* p = start + (count); \ |
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1981 while (start < p) { \ |
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1982 --p; \ |
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1983 (assert_fn)(p); \ |
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1984 do_oop; \ |
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1985 } \ |
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1986 } |
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1987 |
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1988 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1989 T, start_p, count, low, high, \ |
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1990 do_oop, assert_fn) \ |
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1991 { \ |
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1992 T* const l = (T*)(low); \ |
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1993 T* const h = (T*)(high); \ |
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1994 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1995 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1996 "bounded region must be properly aligned"); \ |
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1997 T* p = (T*)(start_p); \ |
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1998 T* end = p + (count); \ |
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1999 if (p < l) p = l; \ |
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2000 if (end > h) end = h; \ |
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2001 while (p < end) { \ |
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2002 (assert_fn)(p); \ |
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2003 do_oop; \ |
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2004 ++p; \ |
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2005 } \ |
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2006 } |
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2007 |
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2008 |
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2009 // The following macros call specialized macros, passing either oop or |
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2010 // narrowOop as the specialization type. These test the UseCompressedOops |
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2011 // flag. |
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2012 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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2013 { \ |
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2014 /* Compute oopmap block range. The common case \ |
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2015 is nonstatic_oop_map_size == 1. */ \ |
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2016 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 2017 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
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2018 if (UseCompressedOops) { \ |
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2019 while (map < end_map) { \ |
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2020 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
938 | 2021 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2022 do_oop, assert_fn) \ |
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2023 ++map; \ |
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2024 } \ |
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2025 } else { \ |
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2026 while (map < end_map) { \ |
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2027 InstanceKlass_SPECIALIZED_OOP_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 ++map; \ |
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2031 } \ |
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2032 } \ |
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2033 } |
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2034 |
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2035 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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2036 { \ |
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2037 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
938 | 2038 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
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2039 if (UseCompressedOops) { \ |
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2040 while (start_map < map) { \ |
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2041 --map; \ |
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2042 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
938 | 2043 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2044 do_oop, assert_fn) \ |
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2045 } \ |
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2046 } else { \ |
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2047 while (start_map < map) { \ |
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2048 --map; \ |
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2049 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
938 | 2050 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2051 do_oop, assert_fn) \ |
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2052 } \ |
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2053 } \ |
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2054 } |
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2055 |
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2056 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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2057 assert_fn) \ |
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2058 { \ |
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2059 /* Compute oopmap block range. The common case is \ |
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2060 nonstatic_oop_map_size == 1, so we accept the \ |
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2061 usually non-existent extra overhead of examining \ |
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2062 all the maps. */ \ |
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2063 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 2064 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
113
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2065 if (UseCompressedOops) { \ |
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2066 while (map < end_map) { \ |
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2067 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
938 | 2068 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2069 low, high, \ |
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2070 do_oop, assert_fn) \ |
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2071 ++map; \ |
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2072 } \ |
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2073 } else { \ |
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2074 while (map < end_map) { \ |
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2075 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
938 | 2076 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2077 low, high, \ |
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2078 do_oop, assert_fn) \ |
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2079 ++map; \ |
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2080 } \ |
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2081 } \ |
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2082 } |
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2083 |
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2084 void InstanceKlass::oop_follow_contents(oop obj) { |
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2085 assert(obj != NULL, "can't follow the content of NULL object"); |
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2086 MarkSweep::follow_klass(obj->klass()); |
113
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2087 InstanceKlass_OOP_MAP_ITERATE( \ |
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2088 obj, \ |
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2089 MarkSweep::mark_and_push(p), \ |
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2090 assert_is_in_closed_subset) |
0 | 2091 } |
2092 | |
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2093 #if INCLUDE_ALL_GCS |
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2094 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
0 | 2095 oop obj) { |
113
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2096 assert(obj != NULL, "can't follow the content of NULL object"); |
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2097 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2098 // Only mark the header and let the scan of the meta-data mark |
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2099 // everything else. |
113
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2100 InstanceKlass_OOP_MAP_ITERATE( \ |
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2101 obj, \ |
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2102 PSParallelCompact::mark_and_push(cm, p), \ |
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2103 assert_is_in) |
0 | 2104 } |
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2105 #endif // INCLUDE_ALL_GCS |
0 | 2106 |
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2107 // closure's do_metadata() method dictates whether the given closure should be |
0 | 2108 // applied to the klass ptr in the object header. |
2109 | |
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2110 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2111 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2112 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2113 "Inconsistency in do_metadata"); \ |
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2114 if (closure->do_metadata##nv_suffix()) |
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2115 |
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2116 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
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2117 \ |
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2118 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
113
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2119 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2120 /* header */ \ |
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2121 if_do_metadata_checked(closure, nv_suffix) { \ |
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2122 closure->do_klass##nv_suffix(obj->klass()); \ |
113
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2123 } \ |
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2124 InstanceKlass_OOP_MAP_ITERATE( \ |
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2125 obj, \ |
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2126 SpecializationStats:: \ |
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2127 record_do_oop_call##nv_suffix(SpecializationStats::ik); \ |
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2128 (closure)->do_oop##nv_suffix(p), \ |
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2129 assert_is_in_closed_subset) \ |
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2130 return size_helper(); \ |
0 | 2131 } |
2132 | |
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2133 #if INCLUDE_ALL_GCS |
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2134 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2135 \ |
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2136 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
342
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2137 OopClosureType* closure) { \ |
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2138 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2139 /* header */ \ |
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2140 if_do_metadata_checked(closure, nv_suffix) { \ |
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2141 closure->do_klass##nv_suffix(obj->klass()); \ |
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2142 } \ |
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2143 /* instance variables */ \ |
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2144 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2145 obj, \ |
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2146 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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2147 (closure)->do_oop##nv_suffix(p), \ |
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2148 assert_is_in_closed_subset) \ |
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2149 return size_helper(); \ |
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2150 } |
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2151 #endif // INCLUDE_ALL_GCS |
342
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2152 |
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2153 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2154 \ |
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2155 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
113
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2156 OopClosureType* closure, \ |
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2157 MemRegion mr) { \ |
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2158 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2159 if_do_metadata_checked(closure, nv_suffix) { \ |
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2160 if (mr.contains(obj)) { \ |
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2161 closure->do_klass##nv_suffix(obj->klass()); \ |
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2162 } \ |
113
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2163 } \ |
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2164 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2165 obj, mr.start(), mr.end(), \ |
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2166 (closure)->do_oop##nv_suffix(p), \ |
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2167 assert_is_in_closed_subset) \ |
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2168 return size_helper(); \ |
0 | 2169 } |
2170 | |
2171 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
342
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2172 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
0 | 2173 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2174 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2175 #if INCLUDE_ALL_GCS |
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2176 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2177 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2178 #endif // INCLUDE_ALL_GCS |
0 | 2179 |
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2180 int InstanceKlass::oop_adjust_pointers(oop obj) { |
0 | 2181 int size = size_helper(); |
113
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2182 InstanceKlass_OOP_MAP_ITERATE( \ |
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2183 obj, \ |
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2184 MarkSweep::adjust_pointer(p), \ |
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2185 assert_is_in) |
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2186 MarkSweep::adjust_klass(obj->klass()); |
0 | 2187 return size; |
2188 } | |
2189 | |
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2190 #if INCLUDE_ALL_GCS |
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2191 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
113
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2192 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2193 obj, \ |
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2194 if (PSScavenge::should_scavenge(p)) { \ |
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2195 pm->claim_or_forward_depth(p); \ |
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2196 }, \ |
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2197 assert_nothing ) |
0 | 2198 } |
2199 | |
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2200 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
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2201 int size = size_helper(); |
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2202 InstanceKlass_OOP_MAP_ITERATE( \ |
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2203 obj, \ |
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2204 PSParallelCompact::adjust_pointer(p), \ |
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2205 assert_is_in) |
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2206 obj->update_header(cm); |
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2207 return size; |
0 | 2208 } |
2209 | |
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2210 #endif // INCLUDE_ALL_GCS |
0 | 2211 |
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2212 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
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2213 assert(is_loader_alive(is_alive), "this klass should be live"); |
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2214 if (is_interface()) { |
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2215 if (ClassUnloading) { |
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2216 Klass* impl = implementor(); |
5998
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2217 if (impl != NULL) { |
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2218 if (!impl->is_loader_alive(is_alive)) { |
5998
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2219 // remove this guy |
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2220 Klass** klass = adr_implementor(); |
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2221 assert(klass != NULL, "null klass"); |
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2222 if (klass != NULL) { |
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2223 *klass = NULL; |
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2224 } |
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2225 } |
0 | 2226 } |
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2227 } |
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2228 } |
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2229 } |
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2230 |
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2231 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
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2232 for (int m = 0; m < methods()->length(); m++) { |
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2233 MethodData* mdo = methods()->at(m)->method_data(); |
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2234 if (mdo != NULL) { |
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2235 for (ProfileData* data = mdo->first_data(); |
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2236 mdo->is_valid(data); |
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2237 data = mdo->next_data(data)) { |
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2238 data->clean_weak_klass_links(is_alive); |
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2239 } |
0 | 2240 } |
2241 } | |
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2242 } |
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2243 |
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2244 |
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2245 static void remove_unshareable_in_class(Klass* k) { |
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2246 // remove klass's unshareable info |
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2247 k->remove_unshareable_info(); |
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2248 } |
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2249 |
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2250 void InstanceKlass::remove_unshareable_info() { |
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2251 Klass::remove_unshareable_info(); |
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2252 // Unlink the class |
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2253 if (is_linked()) { |
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2254 unlink_class(); |
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2255 } |
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2256 init_implementor(); |
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2257 |
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2258 constants()->remove_unshareable_info(); |
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2259 |
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2260 for (int i = 0; i < methods()->length(); i++) { |
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2261 Method* m = methods()->at(i); |
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2262 m->remove_unshareable_info(); |
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2263 } |
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2264 |
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2265 // Need to reinstate when reading back the class. |
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2266 set_init_lock(NULL); |
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2267 |
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2268 // do array classes also. |
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2269 array_klasses_do(remove_unshareable_in_class); |
0 | 2270 } |
2271 | |
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2272 void restore_unshareable_in_class(Klass* k, TRAPS) { |
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2273 k->restore_unshareable_info(CHECK); |
0 | 2274 } |
2275 | |
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2276 void InstanceKlass::restore_unshareable_info(TRAPS) { |
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2277 Klass::restore_unshareable_info(CHECK); |
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2278 instanceKlassHandle ik(THREAD, this); |
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2279 |
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2280 Array<Method*>* methods = ik->methods(); |
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2281 int num_methods = methods->length(); |
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2282 for (int index2 = 0; index2 < num_methods; ++index2) { |
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2283 methodHandle m(THREAD, methods->at(index2)); |
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2284 m()->link_method(m, CHECK); |
6733
fa6e618671d7
7195867: NPG: SAJDI tests fail with sun.jvm.hotspot.types.WrongTypeException: No suitable match for type
coleenp
parents:
6725
diff
changeset
|
2285 // restore method's vtable by calling a virtual function |
fa6e618671d7
7195867: NPG: SAJDI tests fail with sun.jvm.hotspot.types.WrongTypeException: No suitable match for type
coleenp
parents:
6725
diff
changeset
|
2286 m->restore_vtable(); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2287 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
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diff
changeset
|
2288 if (JvmtiExport::has_redefined_a_class()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2289 // Reinitialize vtable because RedefineClasses may have changed some |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2290 // entries in this vtable for super classes so the CDS vtable might |
da91efe96a93
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coleenp
parents:
6266
diff
changeset
|
2291 // point to old or obsolete entries. RedefineClasses doesn't fix up |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2292 // vtables in the shared system dictionary, only the main one. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
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|
2293 // It also redefines the itable too so fix that too. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2294 ResourceMark rm(THREAD); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2295 ik->vtable()->initialize_vtable(false, CHECK); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2296 ik->itable()->initialize_itable(false, CHECK); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2297 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2298 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2299 // Allocate a simple java object for a lock. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2300 // This needs to be a java object because during class initialization |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
2301 // it can be held across a java call. |
da91efe96a93
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coleenp
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diff
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|
2302 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); |
da91efe96a93
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diff
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|
2303 Handle h(THREAD, (oop)r); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2304 ik->set_init_lock(h()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2305 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2306 // restore constant pool resolved references |
da91efe96a93
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diff
changeset
|
2307 ik->constants()->restore_unshareable_info(CHECK); |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2308 |
da91efe96a93
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|
2309 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
da91efe96a93
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diff
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|
2310 } |
da91efe96a93
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diff
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|
2311 |
da91efe96a93
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diff
changeset
|
2312 static void clear_all_breakpoints(Method* m) { |
0 | 2313 m->clear_all_breakpoints(); |
2314 } | |
2315 | |
10149
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
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diff
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|
2316 |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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diff
changeset
|
2317 void InstanceKlass::notify_unload_class(InstanceKlass* ik) { |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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diff
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|
2318 // notify the debugger |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
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diff
changeset
|
2319 if (JvmtiExport::should_post_class_unload()) { |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
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diff
changeset
|
2320 JvmtiExport::post_class_unload(ik); |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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parents:
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diff
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|
2321 } |
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8011803: release_C_heap_structures is never called for anonymous classes.
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diff
changeset
|
2322 |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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parents:
10133
diff
changeset
|
2323 // notify ClassLoadingService of class unload |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
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diff
changeset
|
2324 ClassLoadingService::notify_class_unloaded(ik); |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
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diff
changeset
|
2325 } |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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diff
changeset
|
2326 |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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diff
changeset
|
2327 void InstanceKlass::release_C_heap_structures(InstanceKlass* ik) { |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
parents:
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diff
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|
2328 // Clean up C heap |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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diff
changeset
|
2329 ik->release_C_heap_structures(); |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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diff
changeset
|
2330 ik->constants()->release_C_heap_structures(); |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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parents:
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diff
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|
2331 } |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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diff
changeset
|
2332 |
6725
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diff
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|
2333 void InstanceKlass::release_C_heap_structures() { |
10149
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
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diff
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|
2334 |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
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parents:
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diff
changeset
|
2335 // 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
|
2336 // 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
|
2337 // redefine classes. |
d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
coleenp
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diff
changeset
|
2338 |
0 | 2339 // Deallocate oop map cache |
2340 if (_oop_map_cache != NULL) { | |
2341 delete _oop_map_cache; | |
2342 _oop_map_cache = NULL; | |
2343 } | |
2344 | |
2345 // Deallocate JNI identifiers for jfieldIDs | |
2346 JNIid::deallocate(jni_ids()); | |
2347 set_jni_ids(NULL); | |
2348 | |
2349 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
2350 if (jmeths != (jmethodID*)NULL) { | |
2351 release_set_methods_jmethod_ids(NULL); | |
2352 FreeHeap(jmeths); | |
2353 } | |
2354 | |
10133
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
sspitsyn
parents:
9062
diff
changeset
|
2355 MemberNameTable* mnt = member_names(); |
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
sspitsyn
parents:
9062
diff
changeset
|
2356 if (mnt != NULL) { |
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
sspitsyn
parents:
9062
diff
changeset
|
2357 delete mnt; |
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
sspitsyn
parents:
9062
diff
changeset
|
2358 set_member_names(NULL); |
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
sspitsyn
parents:
9062
diff
changeset
|
2359 } |
6337ca4dcad8
8008511: JSR 292: MemberName vmtarget refs to methods must be updated at class redefinition
sspitsyn
parents:
9062
diff
changeset
|
2360 |
0 | 2361 int* indices = methods_cached_itable_indices_acquire(); |
2362 if (indices != (int*)NULL) { | |
2363 release_set_methods_cached_itable_indices(NULL); | |
2364 FreeHeap(indices); | |
2365 } | |
2366 | |
2367 // release dependencies | |
2368 nmethodBucket* b = _dependencies; | |
2369 _dependencies = NULL; | |
2370 while (b != NULL) { | |
2371 nmethodBucket* next = b->next(); | |
2372 delete b; | |
2373 b = next; | |
2374 } | |
2375 | |
2376 // Deallocate breakpoint records | |
2377 if (breakpoints() != 0x0) { | |
2378 methods_do(clear_all_breakpoints); | |
2379 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
2380 } | |
2381 | |
2382 // deallocate information about previous versions | |
2383 if (_previous_versions != NULL) { | |
2384 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
2385 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
2386 delete pv_node; | |
2387 } | |
2388 delete _previous_versions; | |
2389 _previous_versions = NULL; | |
2390 } | |
2391 | |
2392 // deallocate the cached class file | |
2393 if (_cached_class_file_bytes != NULL) { | |
6197 | 2394 os::free(_cached_class_file_bytes, mtClass); |
0 | 2395 _cached_class_file_bytes = NULL; |
2396 _cached_class_file_len = 0; | |
2397 } | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2398 |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2399 // 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
|
2400 if (_name != NULL) _name->decrement_refcount(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2401 // 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
|
2402 // class can't be referenced anymore). |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2403 if (_array_name != NULL) _array_name->decrement_refcount(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2404 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
|
2405 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
|
2406 |
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7180
diff
changeset
|
2407 assert(_total_instanceKlass_count >= 1, "Sanity check"); |
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7180
diff
changeset
|
2408 Atomic::dec(&_total_instanceKlass_count); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2409 } |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2410 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2411 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
|
2412 _source_file_name = n; |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2413 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
|
2414 } |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
2415 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2416 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
|
2417 if (array == NULL) { |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2418 _source_debug_extension = NULL; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2419 } else { |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2420 // 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
|
2421 // 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
|
2422 // 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
|
2423 // unlikely to happen. |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2424 assert((length+1) > length, "Overflow checking"); |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2425 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
|
2426 for (int i = 0; i < length; i++) { |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2427 sde[i] = array[i]; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2428 } |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2429 sde[length] = '\0'; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2430 _source_debug_extension = sde; |
04ade88d9712
6294277: java -Xdebug crashes on SourceDebugExtension attribute larger than 64K
fparain
parents:
6197
diff
changeset
|
2431 } |
0 | 2432 } |
2433 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2434 address InstanceKlass::static_field_addr(int offset) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents:
6733
diff
changeset
|
2435 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
|
2436 } |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2437 |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2438 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2439 const char* InstanceKlass::signature_name() const { |
0 | 2440 const char* src = (const char*) (name()->as_C_string()); |
2441 const int src_length = (int)strlen(src); | |
2442 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
2443 int src_index = 0; | |
2444 int dest_index = 0; | |
2445 dest[dest_index++] = 'L'; | |
2446 while (src_index < src_length) { | |
2447 dest[dest_index++] = src[src_index++]; | |
2448 } | |
2449 dest[dest_index++] = ';'; | |
2450 dest[dest_index] = '\0'; | |
2451 return dest; | |
2452 } | |
2453 | |
2454 // different verisons of is_same_class_package | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2455 bool InstanceKlass::is_same_class_package(Klass* class2) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2456 Klass* class1 = this; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2457 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2458 Symbol* classname1 = class1->name(); |
2459 | |
2460 if (class2->oop_is_objArray()) { | |
6831
d8ce2825b193
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents:
6735
diff
changeset
|
2461 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
0 | 2462 } |
2463 oop classloader2; | |
6983 | 2464 if (class2->oop_is_instance()) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2465 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
0 | 2466 } else { |
6983 | 2467 assert(class2->oop_is_typeArray(), "should be type array"); |
0 | 2468 classloader2 = NULL; |
2469 } | |
6983 | 2470 Symbol* classname2 = class2->name(); |
0 | 2471 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2472 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2473 classloader2, classname2); |
2474 } | |
2475 | |
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2476 bool InstanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) { |
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2477 Klass* class1 = this; |
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|
2478 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2479 Symbol* classname1 = class1->name(); |
0 | 2480 |
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2481 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2482 classloader2, classname2); |
2483 } | |
2484 | |
2485 // return true if two classes are in the same package, classloader | |
2486 // and classname information is enough to determine a class's package | |
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2487 bool InstanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1, |
2177
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|
2488 oop class_loader2, Symbol* class_name2) { |
0 | 2489 if (class_loader1 != class_loader2) { |
2490 return false; | |
665
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2491 } else if (class_name1 == class_name2) { |
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2492 return true; // skip painful bytewise comparison |
0 | 2493 } else { |
2494 ResourceMark rm; | |
2495 | |
2177
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|
2496 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
0 | 2497 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
2498 // Otherwise, we just compare jbyte values between the strings. | |
2177
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|
2499 const jbyte *name1 = class_name1->base(); |
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2500 const jbyte *name2 = class_name2->base(); |
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|
2501 |
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|
2502 const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/'); |
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diff
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|
2503 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
0 | 2504 |
2505 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
2506 // One of the two doesn't have a package. Only return true | |
2507 // if the other one also doesn't have a package. | |
2508 return last_slash1 == last_slash2; | |
2509 } else { | |
2510 // Skip over '['s | |
2511 if (*name1 == '[') { | |
2512 do { | |
2513 name1++; | |
2514 } while (*name1 == '['); | |
2515 if (*name1 != 'L') { | |
2516 // Something is terribly wrong. Shouldn't be here. | |
2517 return false; | |
2518 } | |
2519 } | |
2520 if (*name2 == '[') { | |
2521 do { | |
2522 name2++; | |
2523 } while (*name2 == '['); | |
2524 if (*name2 != 'L') { | |
2525 // Something is terribly wrong. Shouldn't be here. | |
2526 return false; | |
2527 } | |
2528 } | |
2529 | |
2530 // Check that package part is identical | |
2531 int length1 = last_slash1 - name1; | |
2532 int length2 = last_slash2 - name2; | |
2533 | |
2534 return UTF8::equal(name1, length1, name2, length2); | |
2535 } | |
2536 } | |
2537 } | |
2538 | |
652
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|
2539 // Returns true iff super_method can be overridden by a method in targetclassname |
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2540 // See JSL 3rd edition 8.4.6.1 |
4aaa9f5e02a8
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|
2541 // Assumes name-signature match |
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2542 // "this" is InstanceKlass of super_method which must exist |
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2543 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
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2544 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
652
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2545 // Private methods can not be overridden |
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|
2546 if (super_method->is_private()) { |
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|
2547 return false; |
4aaa9f5e02a8
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acorn
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diff
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|
2548 } |
4aaa9f5e02a8
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diff
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|
2549 // If super method is accessible, then override |
4aaa9f5e02a8
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diff
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|
2550 if ((super_method->is_protected()) || |
4aaa9f5e02a8
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diff
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|
2551 (super_method->is_public())) { |
4aaa9f5e02a8
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diff
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|
2552 return true; |
4aaa9f5e02a8
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acorn
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diff
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|
2553 } |
4aaa9f5e02a8
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diff
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|
2554 // Package-private methods are not inherited outside of package |
4aaa9f5e02a8
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|
2555 assert(super_method->is_package_private(), "must be package private"); |
2177
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diff
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|
2556 return(is_same_class_package(targetclassloader(), targetclassname)); |
652
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diff
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|
2557 } |
0 | 2558 |
665
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diff
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|
2559 /* defined for now in jvm.cpp, for historical reasons *-- |
6725
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|
2560 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle self, |
2177
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diff
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|
2561 Symbol*& simple_name_result, TRAPS) { |
665
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diff
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|
2562 ... |
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|
2563 } |
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diff
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|
2564 */ |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
changeset
|
2565 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
changeset
|
2566 // tell if two classes have the same enclosing class (at package level) |
6725
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|
2567 bool InstanceKlass::is_same_package_member_impl(instanceKlassHandle class1, |
da91efe96a93
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|
2568 Klass* class2_oop, TRAPS) { |
da91efe96a93
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|
2569 if (class2_oop == class1()) return true; |
6983 | 2570 if (!class2_oop->oop_is_instance()) return false; |
665
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6814659: separable cleanups and subroutines for 6655638
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diff
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|
2571 instanceKlassHandle class2(THREAD, class2_oop); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2572 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2573 // must be in same package before we try anything else |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
changeset
|
2574 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2575 return false; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2576 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2577 // As long as there is an outer1.getEnclosingClass, |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2578 // shift the search outward. |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2579 instanceKlassHandle outer1 = class1; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2580 for (;;) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2581 // As we walk along, look for equalities between outer1 and class2. |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2582 // Eventually, the walks will terminate as outer1 stops |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2583 // at the top-level class around the original class. |
1126
933a3e806ce6
6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
changeset
|
2584 bool ignore_inner_is_member; |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
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|
2585 Klass* next = outer1->compute_enclosing_class(&ignore_inner_is_member, |
1126
933a3e806ce6
6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
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|
2586 CHECK_false); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2587 if (next == NULL) break; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2588 if (next == class2()) return true; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
changeset
|
2589 outer1 = instanceKlassHandle(THREAD, next); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2590 } |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2591 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2592 // Now do the same for class2. |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
changeset
|
2593 instanceKlassHandle outer2 = class2; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2594 for (;;) { |
1126
933a3e806ce6
6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
changeset
|
2595 bool ignore_inner_is_member; |
6725
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coleenp
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|
2596 Klass* next = outer2->compute_enclosing_class(&ignore_inner_is_member, |
1126
933a3e806ce6
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xlu
parents:
1039
diff
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|
2597 CHECK_false); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2598 if (next == NULL) break; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2599 // Might as well check the new outer against all available values. |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2600 if (next == class1()) return true; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2601 if (next == outer1()) return true; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2602 outer2 = instanceKlassHandle(THREAD, next); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2603 } |
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6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2604 |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2605 // If by this point we have not found an equality between the |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2606 // two classes, we know they are in separate package members. |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2607 return false; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2608 } |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2609 |
0 | 2610 |
6725
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|
2611 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
0 | 2612 jint access = access_flags().as_int(); |
2613 | |
2614 // But check if it happens to be member class. | |
6725
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|
2615 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
diff
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|
2616 InnerClassesIterator iter(ik); |
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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|
2617 for (; !iter.done(); iter.next()) { |
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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|
2618 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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|
2619 // Inner class attribute can be zero, skip it. |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2620 // 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
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4739
diff
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|
2621 if (ioff == 0) continue; |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
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4739
diff
changeset
|
2622 |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
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4739
diff
changeset
|
2623 // 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
changeset
|
2624 // 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:
4739
diff
changeset
|
2625 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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|
2626 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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|
2627 // This is really a member class. |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2628 access = iter.inner_access_flags(); |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2629 break; |
0 | 2630 } |
2631 } | |
2632 // Remember to strip ACC_SUPER bit | |
2633 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
2634 } | |
2635 | |
6725
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|
2636 jint InstanceKlass::jvmti_class_status() const { |
0 | 2637 jint result = 0; |
2638 | |
2639 if (is_linked()) { | |
2640 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
2641 } | |
2642 | |
2643 if (is_initialized()) { | |
2644 assert(is_linked(), "Class status is not consistent"); | |
2645 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
2646 } | |
2647 if (is_in_error_state()) { | |
2648 result |= JVMTI_CLASS_STATUS_ERROR; | |
2649 } | |
2650 return result; | |
2651 } | |
2652 | |
6725
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|
2653 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
0 | 2654 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
2655 int method_table_offset_in_words = ioe->offset()/wordSize; | |
2656 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
2657 / itableOffsetEntry::size(); | |
2658 | |
2659 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
605 | 2660 // If the interface isn't implemented by the receiver class, |
0 | 2661 // the VM should throw IncompatibleClassChangeError. |
2662 if (cnt >= nof_interfaces) { | |
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2663 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
0 | 2664 } |
2665 | |
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2666 Klass* ik = ioe->interface_klass(); |
0 | 2667 if (ik == holder) break; |
2668 } | |
2669 | |
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2670 itableMethodEntry* ime = ioe->first_method_entry(this); |
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2671 Method* m = ime[index].method(); |
0 | 2672 if (m == NULL) { |
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2673 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
0 | 2674 } |
2675 return m; | |
2676 } | |
2677 | |
2678 // On-stack replacement stuff | |
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2679 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
0 | 2680 // only one compilation can be active |
2681 NEEDS_CLEANUP | |
2682 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
2683 OsrList_lock->lock_without_safepoint_check(); | |
2684 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
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2685 n->set_osr_link(osr_nmethods_head()); |
0 | 2686 set_osr_nmethods_head(n); |
1783 | 2687 // Raise the highest osr level if necessary |
2688 if (TieredCompilation) { | |
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2689 Method* m = n->method(); |
1783 | 2690 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
2691 } | |
0 | 2692 // Remember to unlock again |
2693 OsrList_lock->unlock(); | |
1783 | 2694 |
2695 // Get rid of the osr methods for the same bci that have lower levels. | |
2696 if (TieredCompilation) { | |
2697 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
2698 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
2699 if (inv != NULL && inv->is_in_use()) { | |
2700 inv->make_not_entrant(); | |
2701 } | |
2702 } | |
2703 } | |
0 | 2704 } |
2705 | |
2706 | |
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2707 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
0 | 2708 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2709 OsrList_lock->lock_without_safepoint_check(); | |
2710 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
2711 nmethod* last = NULL; | |
2712 nmethod* cur = osr_nmethods_head(); | |
1783 | 2713 int max_level = CompLevel_none; // Find the max comp level excluding n |
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2714 Method* m = n->method(); |
0 | 2715 // Search for match |
2716 while(cur != NULL && cur != n) { | |
1783 | 2717 if (TieredCompilation) { |
2718 // Find max level before n | |
2719 max_level = MAX2(max_level, cur->comp_level()); | |
2720 } | |
0 | 2721 last = cur; |
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2722 cur = cur->osr_link(); |
0 | 2723 } |
1783 | 2724 nmethod* next = NULL; |
0 | 2725 if (cur == n) { |
1783 | 2726 next = cur->osr_link(); |
0 | 2727 if (last == NULL) { |
2728 // Remove first element | |
1783 | 2729 set_osr_nmethods_head(next); |
0 | 2730 } else { |
1783 | 2731 last->set_osr_link(next); |
0 | 2732 } |
2733 } | |
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2734 n->set_osr_link(NULL); |
1783 | 2735 if (TieredCompilation) { |
2736 cur = next; | |
2737 while (cur != NULL) { | |
2738 // Find max level after n | |
2739 max_level = MAX2(max_level, cur->comp_level()); | |
2740 cur = cur->osr_link(); | |
2741 } | |
2742 m->set_highest_osr_comp_level(max_level); | |
2743 } | |
0 | 2744 // Remember to unlock again |
2745 OsrList_lock->unlock(); | |
2746 } | |
2747 | |
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2748 nmethod* InstanceKlass::lookup_osr_nmethod(Method* const m, int bci, int comp_level, bool match_level) const { |
0 | 2749 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2750 OsrList_lock->lock_without_safepoint_check(); | |
2751 nmethod* osr = osr_nmethods_head(); | |
1783 | 2752 nmethod* best = NULL; |
0 | 2753 while (osr != NULL) { |
2754 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
1783 | 2755 // There can be a time when a c1 osr method exists but we are waiting |
2756 // for a c2 version. When c2 completes its osr nmethod we will trash | |
2757 // the c1 version and only be able to find the c2 version. However | |
2758 // while we overflow in the c1 code at back branches we don't want to | |
2759 // try and switch to the same code as we are already running | |
2760 | |
0 | 2761 if (osr->method() == m && |
2762 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
1783 | 2763 if (match_level) { |
2764 if (osr->comp_level() == comp_level) { | |
2765 // Found a match - return it. | |
2766 OsrList_lock->unlock(); | |
2767 return osr; | |
2768 } | |
2769 } else { | |
2770 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
2771 if (osr->comp_level() == CompLevel_highest_tier) { | |
2772 // Found the best possible - return it. | |
2773 OsrList_lock->unlock(); | |
2774 return osr; | |
2775 } | |
2776 best = osr; | |
2777 } | |
2778 } | |
0 | 2779 } |
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2780 osr = osr->osr_link(); |
0 | 2781 } |
2782 OsrList_lock->unlock(); | |
1783 | 2783 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
2784 return best; | |
2785 } | |
0 | 2786 return NULL; |
2787 } | |
2788 | |
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2789 void InstanceKlass::add_member_name(Handle mem_name) { |
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2790 jweak mem_name_wref = JNIHandles::make_weak_global(mem_name); |
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2791 MutexLocker ml(MemberNameTable_lock); |
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2792 DEBUG_ONLY(No_Safepoint_Verifier nsv); |
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2793 |
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2794 if (_member_names == NULL) { |
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2795 _member_names = new (ResourceObj::C_HEAP, mtClass) MemberNameTable(); |
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2796 } |
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2797 _member_names->add_member_name(mem_name_wref); |
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2798 } |
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2799 |
0 | 2800 // ----------------------------------------------------------------------------------------------------- |
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2801 // Printing |
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2802 |
0 | 2803 #ifndef PRODUCT |
2804 | |
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2805 #define BULLET " - " |
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2806 |
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2807 static const char* state_names[] = { |
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2808 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
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2809 }; |
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2810 |
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2811 void InstanceKlass::print_on(outputStream* st) const { |
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2812 assert(is_klass(), "must be klass"); |
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2813 Klass::print_on(st); |
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2814 |
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2815 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
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2816 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2817 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
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2818 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
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2819 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2820 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
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2821 st->print(BULLET"sub: "); |
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2822 Klass* sub = subklass(); |
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2823 int n; |
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2824 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
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2825 if (n < MaxSubklassPrintSize) { |
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2826 sub->print_value_on(st); |
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2827 st->print(" "); |
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2828 } |
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2829 } |
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2830 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
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2831 st->cr(); |
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2832 |
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2833 if (is_interface()) { |
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2834 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
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2835 if (nof_implementors() == 1) { |
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2836 st->print_cr(BULLET"implementor: "); |
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2837 st->print(" "); |
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2838 implementor()->print_value_on(st); |
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2839 st->cr(); |
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2840 } |
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2841 } |
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2842 |
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2843 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
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2844 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
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2845 if (Verbose) { |
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2846 Array<Method*>* method_array = methods(); |
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2847 for(int i = 0; i < method_array->length(); i++) { |
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2848 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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2849 } |
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2850 } |
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2851 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
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2852 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
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2853 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
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2854 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
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2855 if (class_loader_data() != NULL) { |
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2856 st->print(BULLET"class loader data: "); |
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2857 class_loader_data()->print_value_on(st); |
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2858 st->cr(); |
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2859 } |
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2860 st->print(BULLET"protection domain: "); ((InstanceKlass*)this)->protection_domain()->print_value_on(st); st->cr(); |
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2861 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
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2862 st->print(BULLET"signers: "); signers()->print_value_on(st); st->cr(); |
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|
2863 st->print(BULLET"init_lock: "); ((oop)_init_lock)->print_value_on(st); st->cr(); |
6725
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2864 if (source_file_name() != NULL) { |
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2865 st->print(BULLET"source file: "); |
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2866 source_file_name()->print_value_on(st); |
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|
2867 st->cr(); |
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|
2868 } |
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|
2869 if (source_debug_extension() != NULL) { |
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|
2870 st->print(BULLET"source debug extension: "); |
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|
2871 st->print("%s", source_debug_extension()); |
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6964458: Reimplement class meta-data storage to use native memory
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|
2872 st->cr(); |
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|
2873 } |
8031 | 2874 st->print(BULLET"class annotations: "); class_annotations()->print_value_on(st); st->cr(); |
2875 st->print(BULLET"class type annotations: "); class_type_annotations()->print_value_on(st); st->cr(); | |
2876 st->print(BULLET"field annotations: "); fields_annotations()->print_value_on(st); st->cr(); | |
2877 st->print(BULLET"field type annotations: "); fields_type_annotations()->print_value_on(st); st->cr(); | |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
2878 { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2879 ResourceMark rm; |
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6964458: Reimplement class meta-data storage to use native memory
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|
2880 // PreviousVersionInfo objects returned via PreviousVersionWalker |
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2881 // contain a GrowableArray of handles. We have to clean up the |
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2882 // GrowableArray _after_ the PreviousVersionWalker destructor |
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2883 // has destroyed the handles. |
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|
2884 { |
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|
2885 bool have_pv = false; |
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|
2886 PreviousVersionWalker pvw((InstanceKlass*)this); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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2887 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
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|
2888 pv_info != NULL; pv_info = pvw.next_previous_version()) { |
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|
2889 if (!have_pv) |
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|
2890 st->print(BULLET"previous version: "); |
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6964458: Reimplement class meta-data storage to use native memory
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|
2891 have_pv = true; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2892 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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|
2893 } |
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|
2894 if (have_pv) st->cr(); |
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|
2895 } // pvw is cleaned up |
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|
2896 } // rm is cleaned up |
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|
2897 |
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6964458: Reimplement class meta-data storage to use native memory
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|
2898 if (generic_signature() != NULL) { |
da91efe96a93
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|
2899 st->print(BULLET"generic signature: "); |
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|
2900 generic_signature()->print_value_on(st); |
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6964458: Reimplement class meta-data storage to use native memory
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|
2901 st->cr(); |
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|
2902 } |
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|
2903 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2904 st->print(BULLET"java mirror: "); java_mirror()->print_value_on(st); st->cr(); |
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|
2905 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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|
2906 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", itable_length(), start_of_itable()); st->cr(); |
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|
2907 st->print_cr(BULLET"---- static fields (%d words):", static_field_size()); |
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|
2908 FieldPrinter print_static_field(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2909 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
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2910 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size()); |
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|
2911 FieldPrinter print_nonstatic_field(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2912 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
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|
2913 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2914 st->print(BULLET"non-static oop maps: "); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2915 OopMapBlock* map = start_of_nonstatic_oop_maps(); |
da91efe96a93
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|
2916 OopMapBlock* end_map = map + nonstatic_oop_map_count(); |
da91efe96a93
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|
2917 while (map < end_map) { |
da91efe96a93
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|
2918 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1)); |
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6964458: Reimplement class meta-data storage to use native memory
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|
2919 map++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2920 } |
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6964458: Reimplement class meta-data storage to use native memory
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|
2921 st->cr(); |
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diff
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|
2922 } |
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|
2923 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2924 #endif //PRODUCT |
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6964458: Reimplement class meta-data storage to use native memory
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|
2925 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2926 void InstanceKlass::print_value_on(outputStream* st) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2927 assert(is_klass(), "must be klass"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2928 name()->print_value_on(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2929 } |
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6964458: Reimplement class meta-data storage to use native memory
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|
2930 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2931 #ifndef PRODUCT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2932 |
0 | 2933 void FieldPrinter::do_field(fieldDescriptor* fd) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
changeset
|
2934 _st->print(BULLET); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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parents:
2357
diff
changeset
|
2935 if (_obj == NULL) { |
0 | 2936 fd->print_on(_st); |
2937 _st->cr(); | |
2938 } else { | |
2939 fd->print_on_for(_st, _obj); | |
2940 _st->cr(); | |
2941 } | |
2942 } | |
2943 | |
2944 | |
6725
da91efe96a93
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coleenp
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|
2945 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
0 | 2946 Klass::oop_print_on(obj, st); |
2947 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2948 if (this == SystemDictionary::String_klass()) { |
0 | 2949 typeArrayOop value = java_lang_String::value(obj); |
2950 juint offset = java_lang_String::offset(obj); | |
2951 juint length = java_lang_String::length(obj); | |
2952 if (value != NULL && | |
2953 value->is_typeArray() && | |
2954 offset <= (juint) value->length() && | |
2955 offset + length <= (juint) value->length()) { | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2956 st->print(BULLET"string: "); |
0 | 2957 Handle h_obj(obj); |
2958 java_lang_String::print(h_obj, st); | |
2959 st->cr(); | |
2960 if (!WizardMode) return; // that is enough | |
2961 } | |
2962 } | |
2963 | |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2964 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
|
2965 FieldPrinter print_field(st, obj); |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2966 do_nonstatic_fields(&print_field); |
0 | 2967 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2968 if (this == SystemDictionary::Class_klass()) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2969 st->print(BULLET"signature: "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2970 java_lang_Class::print_signature(obj, st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
changeset
|
2971 st->cr(); |
6725
da91efe96a93
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coleenp
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|
2972 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2973 st->print(BULLET"fake entry for mirror: "); |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2974 mirrored_klass->print_value_on_maybe_null(st); |
0 | 2975 st->cr(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2976 Klass* array_klass = java_lang_Class::array_klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2977 st->print(BULLET"fake entry for array: "); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2978 array_klass->print_value_on_maybe_null(st); |
0 | 2979 st->cr(); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2980 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
|
2981 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
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|
2982 Klass* real_klass = java_lang_Class::as_Klass(obj); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2983 if (real_klass != NULL && real_klass->oop_is_instance()) { |
da91efe96a93
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coleenp
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diff
changeset
|
2984 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
|
2985 } |
6725
da91efe96a93
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coleenp
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6266
diff
changeset
|
2986 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2987 st->print(BULLET"signature: "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2988 java_lang_invoke_MethodType::print_signature(obj, st); |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2989 st->cr(); |
0 | 2990 } |
2991 } | |
2992 | |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2993 #endif //PRODUCT |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1144
diff
changeset
|
2994 |
6725
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coleenp
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|
2995 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
0 | 2996 st->print("a "); |
2997 name()->print_value_on(st); | |
2998 obj->print_address_on(st); | |
6725
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coleenp
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|
2999 if (this == SystemDictionary::String_klass() |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
changeset
|
3000 && java_lang_String::value(obj) != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3001 ResourceMark rm; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3002 int len = java_lang_String::length(obj); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3003 int plen = (len < 24 ? len : 12); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3004 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3005 st->print(" = \"%s\"", str); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3006 if (len > plen) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3007 st->print("...[%d]", len); |
6725
da91efe96a93
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coleenp
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6266
diff
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|
3008 } else if (this == SystemDictionary::Class_klass()) { |
da91efe96a93
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coleenp
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6266
diff
changeset
|
3009 Klass* k = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3010 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3011 if (k != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3012 k->print_value_on(st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3013 } else { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3014 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
3015 st->print("%s", tname ? tname : "type?"); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
3016 } |
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3017 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
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3018 st->print(" = "); |
2357
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3019 java_lang_invoke_MethodType::print_signature(obj, st); |
665
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3020 } else if (java_lang_boxing_object::is_instance(obj)) { |
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3021 st->print(" = "); |
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3022 java_lang_boxing_object::print(obj, st); |
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3023 } else if (this == SystemDictionary::LambdaForm_klass()) { |
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3024 oop vmentry = java_lang_invoke_LambdaForm::vmentry(obj); |
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3025 if (vmentry != NULL) { |
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|
3026 st->print(" => "); |
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3027 vmentry->print_value_on(st); |
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3028 } |
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3029 } else if (this == SystemDictionary::MemberName_klass()) { |
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3030 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(obj); |
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3031 if (vmtarget != NULL) { |
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3032 st->print(" = "); |
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3033 vmtarget->print_value_on(st); |
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3034 } else { |
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3035 java_lang_invoke_MemberName::clazz(obj)->print_value_on(st); |
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3036 st->print("."); |
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3037 java_lang_invoke_MemberName::name(obj)->print_value_on(st); |
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3038 } |
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3039 } |
0 | 3040 } |
3041 | |
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3042 const char* InstanceKlass::internal_name() const { |
0 | 3043 return external_name(); |
3044 } | |
3045 | |
7956 | 3046 #if INCLUDE_SERVICES |
3047 // Size Statistics | |
3048 void InstanceKlass::collect_statistics(KlassSizeStats *sz) const { | |
3049 Klass::collect_statistics(sz); | |
3050 | |
3051 sz->_inst_size = HeapWordSize * size_helper(); | |
3052 sz->_vtab_bytes = HeapWordSize * align_object_offset(vtable_length()); | |
3053 sz->_itab_bytes = HeapWordSize * align_object_offset(itable_length()); | |
3054 sz->_nonstatic_oopmap_bytes = HeapWordSize * | |
3055 ((is_interface() || is_anonymous()) ? | |
3056 align_object_offset(nonstatic_oop_map_size()) : | |
3057 nonstatic_oop_map_size()); | |
3058 | |
3059 int n = 0; | |
3060 n += (sz->_methods_array_bytes = sz->count_array(methods())); | |
3061 n += (sz->_method_ordering_bytes = sz->count_array(method_ordering())); | |
3062 n += (sz->_local_interfaces_bytes = sz->count_array(local_interfaces())); | |
3063 n += (sz->_transitive_interfaces_bytes = sz->count_array(transitive_interfaces())); | |
3064 n += (sz->_signers_bytes = sz->count_array(signers())); | |
3065 n += (sz->_fields_bytes = sz->count_array(fields())); | |
3066 n += (sz->_inner_classes_bytes = sz->count_array(inner_classes())); | |
3067 sz->_ro_bytes += n; | |
3068 | |
3069 const ConstantPool* cp = constants(); | |
3070 if (cp) { | |
3071 cp->collect_statistics(sz); | |
3072 } | |
3073 | |
3074 const Annotations* anno = annotations(); | |
3075 if (anno) { | |
3076 anno->collect_statistics(sz); | |
3077 } | |
3078 | |
3079 const Array<Method*>* methods_array = methods(); | |
3080 if (methods()) { | |
3081 for (int i = 0; i < methods_array->length(); i++) { | |
3082 Method* method = methods_array->at(i); | |
3083 if (method) { | |
3084 sz->_method_count ++; | |
3085 method->collect_statistics(sz); | |
3086 } | |
3087 } | |
3088 } | |
3089 } | |
3090 #endif // INCLUDE_SERVICES | |
3091 | |
0 | 3092 // Verification |
3093 | |
3094 class VerifyFieldClosure: public OopClosure { | |
113
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3095 protected: |
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3096 template <class T> void do_oop_work(T* p) { |
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3097 oop obj = oopDesc::load_decode_heap_oop(p); |
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3098 if (!obj->is_oop_or_null()) { |
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3099 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
0 | 3100 Universe::print(); |
3101 guarantee(false, "boom"); | |
3102 } | |
3103 } | |
113
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3104 public: |
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3105 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
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3106 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
0 | 3107 }; |
3108 | |
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3109 void InstanceKlass::verify_on(outputStream* st) { |
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3110 Klass::verify_on(st); |
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3111 Thread *thread = Thread::current(); |
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3112 |
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3113 #ifndef PRODUCT |
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3114 // Avoid redundant verifies |
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3115 if (_verify_count == Universe::verify_count()) return; |
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3116 _verify_count = Universe::verify_count(); |
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3117 #endif |
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3118 // Verify that klass is present in SystemDictionary |
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3119 if (is_loaded() && !is_anonymous()) { |
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3120 Symbol* h_name = name(); |
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3121 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
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3122 } |
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3123 |
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3124 // Verify static fields |
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3125 VerifyFieldClosure blk; |
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3126 |
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3127 // Verify vtables |
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3128 if (is_linked()) { |
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3129 ResourceMark rm(thread); |
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3130 // $$$ This used to be done only for m/s collections. Doing it |
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3131 // always seemed a valid generalization. (DLD -- 6/00) |
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3132 vtable()->verify(st); |
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3133 } |
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|
3134 |
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3135 // Verify first subklass |
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3136 if (subklass_oop() != NULL) { |
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3137 guarantee(subklass_oop()->is_metadata(), "should be in metaspace"); |
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3138 guarantee(subklass_oop()->is_klass(), "should be klass"); |
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3139 } |
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|
3140 |
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3141 // Verify siblings |
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3142 Klass* super = this->super(); |
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3143 Klass* sib = next_sibling(); |
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3144 if (sib != NULL) { |
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|
3145 if (sib == this) { |
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3146 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
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3147 } |
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|
3148 |
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3149 guarantee(sib->is_metadata(), "should be in metaspace"); |
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3150 guarantee(sib->is_klass(), "should be klass"); |
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3151 guarantee(sib->super() == super, "siblings should have same superklass"); |
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|
3152 } |
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|
3153 |
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3154 // Verify implementor fields |
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|
3155 Klass* im = implementor(); |
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|
3156 if (im != NULL) { |
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|
3157 guarantee(is_interface(), "only interfaces should have implementor set"); |
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3158 guarantee(im->is_klass(), "should be klass"); |
6983 | 3159 guarantee(!im->is_interface() || im == this, |
6725
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3160 "implementors cannot be interfaces"); |
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|
3161 } |
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|
3162 |
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3163 // Verify local interfaces |
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3164 if (local_interfaces()) { |
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3165 Array<Klass*>* local_interfaces = this->local_interfaces(); |
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3166 for (int j = 0; j < local_interfaces->length(); j++) { |
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3167 Klass* e = local_interfaces->at(j); |
6983 | 3168 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
6725
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3169 } |
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|
3170 } |
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3171 |
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3172 // Verify transitive interfaces |
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3173 if (transitive_interfaces() != NULL) { |
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3174 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
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3175 for (int j = 0; j < transitive_interfaces->length(); j++) { |
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3176 Klass* e = transitive_interfaces->at(j); |
6983 | 3177 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
6725
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3178 } |
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|
3179 } |
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|
3180 |
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3181 // Verify methods |
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3182 if (methods() != NULL) { |
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3183 Array<Method*>* methods = this->methods(); |
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3184 for (int j = 0; j < methods->length(); j++) { |
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3185 guarantee(methods->at(j)->is_metadata(), "should be in metaspace"); |
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3186 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
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3187 } |
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3188 for (int j = 0; j < methods->length() - 1; j++) { |
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3189 Method* m1 = methods->at(j); |
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3190 Method* m2 = methods->at(j + 1); |
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3191 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
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3192 } |
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3193 } |
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3194 |
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3195 // Verify method ordering |
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3196 if (method_ordering() != NULL) { |
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3197 Array<int>* method_ordering = this->method_ordering(); |
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3198 int length = method_ordering->length(); |
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3199 if (JvmtiExport::can_maintain_original_method_order() || |
9057
8554c55669b0
8010943: guarantee(length == 0) failed: invalid method ordering length
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3200 ((UseSharedSpaces || DumpSharedSpaces) && length != 0)) { |
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3201 guarantee(length == methods()->length(), "invalid method ordering length"); |
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3202 jlong sum = 0; |
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3203 for (int j = 0; j < length; j++) { |
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3204 int original_index = method_ordering->at(j); |
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3205 guarantee(original_index >= 0, "invalid method ordering index"); |
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3206 guarantee(original_index < length, "invalid method ordering index"); |
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3207 sum += original_index; |
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3208 } |
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3209 // Verify sum of indices 0,1,...,length-1 |
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3210 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
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3211 } else { |
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3212 guarantee(length == 0, "invalid method ordering length"); |
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3213 } |
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3214 } |
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3215 |
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3216 // Verify JNI static field identifiers |
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3217 if (jni_ids() != NULL) { |
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3218 jni_ids()->verify(this); |
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3219 } |
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3220 |
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3221 // Verify other fields |
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3222 if (array_klasses() != NULL) { |
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3223 guarantee(array_klasses()->is_metadata(), "should be in metaspace"); |
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3224 guarantee(array_klasses()->is_klass(), "should be klass"); |
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3225 } |
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3226 if (constants() != NULL) { |
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3227 guarantee(constants()->is_metadata(), "should be in metaspace"); |
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3228 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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3229 } |
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3230 if (protection_domain() != NULL) { |
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3231 guarantee(protection_domain()->is_oop(), "should be oop"); |
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3232 } |
8693
872b3feace55
8008750: [partfait] Null pointer deference in hotspot/src/share/vm/oops/instanceKlass.hpp
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|
3233 const Klass* host = host_klass(); |
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3234 if (host != NULL) { |
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|
3235 guarantee(host->is_metadata(), "should be in metaspace"); |
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|
3236 guarantee(host->is_klass(), "should be klass"); |
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3237 } |
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3238 if (signers() != NULL) { |
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3239 guarantee(signers()->is_objArray(), "should be obj array"); |
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3240 } |
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3241 } |
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3242 |
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3243 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
0 | 3244 Klass::oop_verify_on(obj, st); |
3245 VerifyFieldClosure blk; | |
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3246 obj->oop_iterate_no_header(&blk); |
0 | 3247 } |
3248 | |
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3249 |
113
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3250 // JNIid class for jfieldIDs only |
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3251 // Note to reviewers: |
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3252 // These JNI functions are just moved over to column 1 and not changed |
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3253 // in the compressed oops workspace. |
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3254 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
113
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3255 _holder = holder; |
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3256 _offset = offset; |
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3257 _next = next; |
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3258 debug_only(_is_static_field_id = false;) |
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3259 } |
0 | 3260 |
3261 | |
113
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3262 JNIid* JNIid::find(int offset) { |
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|
3263 JNIid* current = this; |
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|
3264 while (current != NULL) { |
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|
3265 if (current->offset() == offset) return current; |
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|
3266 current = current->next(); |
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|
3267 } |
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|
3268 return NULL; |
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|
3269 } |
0 | 3270 |
3271 void JNIid::deallocate(JNIid* current) { | |
113
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|
3272 while (current != NULL) { |
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|
3273 JNIid* next = current->next(); |
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|
3274 delete current; |
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|
3275 current = next; |
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|
3276 } |
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|
3277 } |
0 | 3278 |
3279 | |
6725
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|
3280 void JNIid::verify(Klass* holder) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
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6733
diff
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|
3281 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
113
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|
3282 int end_field_offset; |
6725
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3283 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
0 | 3284 |
113
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|
3285 JNIid* current = this; |
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|
3286 while (current != NULL) { |
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|
3287 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
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|
3288 #ifdef ASSERT |
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|
3289 int o = current->offset(); |
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3290 if (current->is_static_field_id()) { |
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|
3291 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
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|
3292 } |
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|
3293 #endif |
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|
3294 current = current->next(); |
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|
3295 } |
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|
3296 } |
0 | 3297 |
3298 | |
3299 #ifdef ASSERT | |
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3300 void InstanceKlass::set_init_state(ClassState state) { |
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3301 bool good_state = is_shared() ? (_init_state <= state) |
113
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3302 : (_init_state < state); |
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|
3303 assert(good_state || state == allocated, "illegal state transition"); |
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
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4006
diff
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|
3304 _init_state = (u1)state; |
113
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3305 } |
0 | 3306 #endif |
3307 | |
3308 | |
3309 // RedefineClasses() support for previous versions: | |
3310 | |
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3311 // Purge previous versions |
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|
3312 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
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3313 if (ik->previous_versions() != NULL) { |
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3314 // This klass has previous versions so see what we can cleanup |
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3315 // while it is safe to do so. |
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3316 |
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3317 int deleted_count = 0; // leave debugging breadcrumbs |
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|
3318 int live_count = 0; |
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3319 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
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3320 ClassLoaderData::the_null_class_loader_data() : |
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|
3321 ik->class_loader_data(); |
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|
3322 |
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|
3323 // RC_TRACE macro has an embedded ResourceMark |
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|
3324 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
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3325 ik->external_name(), ik->previous_versions()->length())); |
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|
3326 |
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3327 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
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3328 // check the previous versions array |
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3329 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
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3330 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
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3331 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
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3332 |
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3333 ConstantPool* pvcp = cp_ref; |
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3334 if (!pvcp->on_stack()) { |
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3335 // If the constant pool isn't on stack, none of the methods |
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3336 // are executing. Delete all the methods, the constant pool and |
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3337 // and this previous version node. |
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3338 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3339 if (method_refs != NULL) { |
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3340 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3341 Method* method = method_refs->at(j); |
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3342 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3343 method_refs->remove_at(j); |
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3344 // method will be freed with associated class. |
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|
3345 } |
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|
3346 } |
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3347 // Remove the constant pool |
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3348 delete pv_node; |
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3349 // Since we are traversing the array backwards, we don't have to |
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|
3350 // do anything special with the index. |
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3351 ik->previous_versions()->remove_at(i); |
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3352 deleted_count++; |
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3353 continue; |
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|
3354 } else { |
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3355 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
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3356 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
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3357 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
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3358 live_count++; |
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3359 } |
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3360 |
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3361 // At least one method is live in this previous version, clean out |
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3362 // the others or mark them as obsolete. |
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3363 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3364 if (method_refs != NULL) { |
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3365 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
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3366 method_refs->length())); |
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3367 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3368 Method* method = method_refs->at(j); |
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3369 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3370 |
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3371 // Remove the emcp method if it's not executing |
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3372 // If it's been made obsolete by a redefinition of a non-emcp |
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3373 // method, mark it as obsolete but leave it to clean up later. |
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3374 if (!method->on_stack()) { |
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3375 method_refs->remove_at(j); |
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3376 } else if (emcp_method_count == 0) { |
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3377 method->set_is_obsolete(); |
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|
3378 } else { |
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3379 // RC_TRACE macro has an embedded ResourceMark |
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3380 RC_TRACE(0x00000200, |
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3381 ("purge: %s(%s): prev method @%d in version @%d is alive", |
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3382 method->name()->as_C_string(), |
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3383 method->signature()->as_C_string(), j, i)); |
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|
3384 } |
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|
3385 } |
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|
3386 } |
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|
3387 } |
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|
3388 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
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|
3389 RC_TRACE(0x00000200, |
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3390 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
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|
3391 deleted_count)); |
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|
3392 } |
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|
3393 } |
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|
3394 |
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|
3395 // External interface for use during class unloading. |
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|
3396 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
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3397 // Call with >0 emcp methods since they are not currently being redefined. |
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3398 purge_previous_versions_internal(ik, 1); |
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|
3399 } |
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|
3400 |
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|
3401 |
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3402 // Potentially add an information node that contains pointers to the |
0 | 3403 // interesting parts of the previous version of the_class. |
6725
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3404 // This is also where we clean out any unused references. |
977
74a5db69c1fe
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dcubed
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diff
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|
3405 // Note that while we delete nodes from the _previous_versions |
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dcubed
parents:
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diff
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|
3406 // array, we never delete the array itself until the klass is |
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
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parents:
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diff
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|
3407 // unloaded. The has_been_redefined() query depends on that fact. |
74a5db69c1fe
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parents:
974
diff
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|
3408 // |
6725
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|
3409 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
113
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diff
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|
3410 BitMap* emcp_methods, int emcp_method_count) { |
0 | 3411 assert(Thread::current()->is_VM_thread(), |
113
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|
3412 "only VMThread can add previous versions"); |
0 | 3413 |
3414 if (_previous_versions == NULL) { | |
3415 // This is the first previous version so make some space. | |
3416 // Start with 2 elements under the assumption that the class | |
3417 // won't be redefined much. | |
6197 | 3418 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
0 | 3419 GrowableArray<PreviousVersionNode *>(2, true); |
3420 } | |
3421 | |
6725
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|
3422 ConstantPool* cp_ref = ikh->constants(); |
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3423 |
0 | 3424 // RC_TRACE macro has an embedded ResourceMark |
6725
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|
3425 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
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|
3426 "on_stack=%d", |
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3427 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
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|
3428 cp_ref->on_stack())); |
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|
3429 |
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|
3430 // If the constant pool for this previous version of the class |
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3431 // is not marked as being on the stack, then none of the methods |
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|
3432 // in this previous version of the class are on the stack so |
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|
3433 // we don't need to create a new PreviousVersionNode. However, |
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|
3434 // we still need to examine older previous versions below. |
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|
3435 Array<Method*>* old_methods = ikh->methods(); |
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|
3436 |
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|
3437 if (cp_ref->on_stack()) { |
0 | 3438 PreviousVersionNode * pv_node = NULL; |
3439 if (emcp_method_count == 0) { | |
6725
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|
3440 // non-shared ConstantPool gets a reference |
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|
3441 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
0 | 3442 RC_TRACE(0x00000400, |
6725
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3443 ("add: all methods are obsolete; flushing any EMCP refs")); |
0 | 3444 } else { |
3445 int local_count = 0; | |
6725
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|
3446 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
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|
3447 GrowableArray<Method*>(emcp_method_count, true); |
0 | 3448 for (int i = 0; i < old_methods->length(); i++) { |
3449 if (emcp_methods->at(i)) { | |
6725
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|
3450 // this old method is EMCP. Save it only if it's on the stack |
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|
3451 Method* old_method = old_methods->at(i); |
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|
3452 if (old_method->on_stack()) { |
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|
3453 method_refs->append(old_method); |
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|
3454 } |
0 | 3455 if (++local_count >= emcp_method_count) { |
3456 // no more EMCP methods so bail out now | |
3457 break; | |
3458 } | |
3459 } | |
3460 } | |
6725
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|
3461 // non-shared ConstantPool gets a reference |
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|
3462 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
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|
3463 } |
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|
3464 // append new previous version. |
0 | 3465 _previous_versions->append(pv_node); |
6725
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3466 } |
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3467 |
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3468 // Since the caller is the VMThread and we are at a safepoint, this |
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3469 // is a good time to clear out unused references. |
0 | 3470 |
3471 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
3472 _previous_versions->length())); | |
3473 | |
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3474 // Purge previous versions not executing on the stack |
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3475 purge_previous_versions_internal(this, emcp_method_count); |
0 | 3476 |
3477 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
3478 | |
3479 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
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3480 _previous_versions->length() > 0) { |
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3481 // We have a mix of obsolete and EMCP methods so we have to |
0 | 3482 // clear out any matching EMCP method entries the hard way. |
3483 int local_count = 0; | |
3484 for (int i = 0; i < old_methods->length(); i++) { | |
3485 if (!emcp_methods->at(i)) { | |
3486 // only obsolete methods are interesting | |
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3487 Method* old_method = old_methods->at(i); |
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3488 Symbol* m_name = old_method->name(); |
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3489 Symbol* m_signature = old_method->signature(); |
0 | 3490 |
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3491 // we might not have added the last entry |
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3492 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
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3493 // check the previous versions array for non executing obsolete methods |
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3494 PreviousVersionNode * pv_node = _previous_versions->at(j); |
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3495 |
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3496 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3497 if (method_refs == NULL) { |
3498 // We have run into a PreviousVersion generation where | |
3499 // all methods were made obsolete during that generation's | |
3500 // RedefineClasses() operation. At the time of that | |
3501 // operation, all EMCP methods were flushed so we don't | |
3502 // have to go back any further. | |
3503 // | |
3504 // A NULL method_refs is different than an empty method_refs. | |
3505 // We cannot infer any optimizations about older generations | |
3506 // from an empty method_refs for the current generation. | |
3507 break; | |
3508 } | |
3509 | |
3510 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
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3511 Method* method = method_refs->at(k); |
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3512 |
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3513 if (!method->is_obsolete() && |
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3514 method->name() == m_name && |
0 | 3515 method->signature() == m_signature) { |
3516 // The current RedefineClasses() call has made all EMCP | |
3517 // versions of this method obsolete so mark it as obsolete | |
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3518 // and remove the reference. |
0 | 3519 RC_TRACE(0x00000400, |
3520 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
3521 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
3522 | |
3523 method->set_is_obsolete(); | |
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3524 // Leave obsolete methods on the previous version list to |
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3525 // clean up later. |
0 | 3526 break; |
3527 } | |
3528 } | |
3529 | |
3530 // The previous loop may not find a matching EMCP method, but | |
3531 // that doesn't mean that we can optimize and not go any | |
3532 // further back in the PreviousVersion generations. The EMCP | |
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3533 // method for this generation could have already been deleted, |
0 | 3534 // but there still may be an older EMCP method that has not |
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3535 // been deleted. |
0 | 3536 } |
3537 | |
3538 if (++local_count >= obsolete_method_count) { | |
3539 // no more obsolete methods so bail out now | |
3540 break; | |
3541 } | |
3542 } | |
3543 } | |
3544 } | |
3545 } // end add_previous_version() | |
3546 | |
3547 | |
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3548 // Determine if InstanceKlass has a previous version. |
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3549 bool InstanceKlass::has_previous_version() const { |
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3550 return (_previous_versions != NULL && _previous_versions->length() > 0); |
0 | 3551 } // end has_previous_version() |
3552 | |
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3553 |
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3554 Method* InstanceKlass::method_with_idnum(int idnum) { |
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3555 Method* m = NULL; |
0 | 3556 if (idnum < methods()->length()) { |
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3557 m = methods()->at(idnum); |
0 | 3558 } |
3559 if (m == NULL || m->method_idnum() != idnum) { | |
3560 for (int index = 0; index < methods()->length(); ++index) { | |
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3561 m = methods()->at(index); |
0 | 3562 if (m->method_idnum() == idnum) { |
3563 return m; | |
3564 } | |
3565 } | |
3566 } | |
3567 return m; | |
3568 } | |
3569 | |
3570 | |
3571 // Construct a PreviousVersionNode entry for the array hung off | |
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3572 // the InstanceKlass. |
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3573 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
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3574 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
0 | 3575 |
3576 _prev_constant_pool = prev_constant_pool; | |
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3577 _prev_cp_is_weak = prev_cp_is_weak; |
0 | 3578 _prev_EMCP_methods = prev_EMCP_methods; |
3579 } | |
3580 | |
3581 | |
3582 // Destroy a PreviousVersionNode | |
3583 PreviousVersionNode::~PreviousVersionNode() { | |
3584 if (_prev_constant_pool != NULL) { | |
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3585 _prev_constant_pool = NULL; |
0 | 3586 } |
3587 | |
3588 if (_prev_EMCP_methods != NULL) { | |
3589 delete _prev_EMCP_methods; | |
3590 } | |
3591 } | |
3592 | |
3593 | |
3594 // Construct a PreviousVersionInfo entry | |
3595 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
3596 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
3597 _prev_EMCP_method_handles = NULL; | |
3598 | |
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3599 ConstantPool* cp = pv_node->prev_constant_pool(); |
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3600 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
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3601 if (cp == NULL) { |
0 | 3602 return; // robustness |
3603 } | |
3604 | |
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3605 // make the ConstantPool* safe to return |
0 | 3606 _prev_constant_pool_handle = constantPoolHandle(cp); |
3607 | |
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3608 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3609 if (method_refs == NULL) { |
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3610 // the InstanceKlass did not have any EMCP methods |
0 | 3611 return; |
3612 } | |
3613 | |
3614 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
3615 | |
3616 int n_methods = method_refs->length(); | |
3617 for (int i = 0; i < n_methods; i++) { | |
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3618 Method* method = method_refs->at(i); |
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3619 assert (method != NULL, "method has been cleared"); |
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3620 if (method == NULL) { |
0 | 3621 continue; // robustness |
3622 } | |
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3623 // make the Method* safe to return |
0 | 3624 _prev_EMCP_method_handles->append(methodHandle(method)); |
3625 } | |
3626 } | |
3627 | |
3628 | |
3629 // Destroy a PreviousVersionInfo | |
3630 PreviousVersionInfo::~PreviousVersionInfo() { | |
3631 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
3632 // don't have to delete it. | |
3633 } | |
3634 | |
3635 | |
3636 // Construct a helper for walking the previous versions array | |
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3637 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
0 | 3638 _previous_versions = ik->previous_versions(); |
3639 _current_index = 0; | |
3640 // _hm needs no initialization | |
3641 _current_p = NULL; | |
3642 } | |
3643 | |
3644 | |
3645 // Destroy a PreviousVersionWalker | |
3646 PreviousVersionWalker::~PreviousVersionWalker() { | |
3647 // Delete the current info just in case the caller didn't walk to | |
3648 // the end of the previous versions list. No harm if _current_p is | |
3649 // already NULL. | |
3650 delete _current_p; | |
3651 | |
3652 // When _hm is destroyed, all the Handles returned in | |
3653 // PreviousVersionInfo objects will be destroyed. | |
3654 // Also, after this destructor is finished it will be | |
3655 // safe to delete the GrowableArray allocated in the | |
3656 // PreviousVersionInfo objects. | |
3657 } | |
3658 | |
3659 | |
3660 // Return the interesting information for the next previous version | |
3661 // of the klass. Returns NULL if there are no more previous versions. | |
3662 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
3663 if (_previous_versions == NULL) { | |
3664 // no previous versions so nothing to return | |
3665 return NULL; | |
3666 } | |
3667 | |
3668 delete _current_p; // cleanup the previous info for the caller | |
3669 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
3670 | |
3671 int length = _previous_versions->length(); | |
3672 | |
3673 while (_current_index < length) { | |
3674 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
6197 | 3675 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
0 | 3676 PreviousVersionInfo(pv_node); |
3677 | |
3678 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
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3679 assert (!cp_h.is_null(), "null cp found in previous version"); |
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3680 |
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3681 // The caller will need to delete pv_info when they are done with it. |
0 | 3682 _current_p = pv_info; |
3683 return pv_info; | |
3684 } | |
3685 | |
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3686 // all of the underlying nodes' info has been deleted |
0 | 3687 return NULL; |
3688 } // end next_previous_version() |