Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.cpp @ 9808:12fdb8fe0a35
turn assertions in NodeClass.FieldScanner into guarantees
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Fri, 17 May 2013 15:41:39 +0200 |
parents | 89e4d67fdd2a |
children | 836a62f43af9 |
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" |
1972 | 57 #include "services/threadService.hpp" |
58 #include "utilities/dtrace.hpp" | |
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59 #include "utilities/macros.hpp" |
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60 #if INCLUDE_ALL_GCS |
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61 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
1972 | 62 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
63 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
64 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
65 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
66 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
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67 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
1972 | 68 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
69 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
70 #include "oops/oop.pcgc.inline.hpp" | |
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71 #endif // INCLUDE_ALL_GCS |
1972 | 72 #ifdef COMPILER1 |
73 #include "c1/c1_Compiler.hpp" | |
74 #endif | |
0 | 75 |
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76 #ifdef DTRACE_ENABLED |
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77 |
4006 | 78 #ifndef USDT2 |
79 | |
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80 HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required, |
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81 char*, intptr_t, oop, intptr_t); |
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82 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive, |
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83 char*, intptr_t, oop, intptr_t, int); |
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84 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent, |
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85 char*, intptr_t, oop, intptr_t, int); |
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86 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous, |
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87 char*, intptr_t, oop, intptr_t, int); |
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88 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed, |
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89 char*, intptr_t, oop, intptr_t, int); |
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90 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit, |
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91 char*, intptr_t, oop, intptr_t, int); |
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92 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error, |
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93 char*, intptr_t, oop, intptr_t, int); |
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94 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end, |
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95 char*, intptr_t, oop, intptr_t, int); |
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96 |
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97 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ |
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98 { \ |
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99 char* data = NULL; \ |
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100 int len = 0; \ |
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101 Symbol* name = (clss)->name(); \ |
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102 if (name != NULL) { \ |
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103 data = (char*)name->bytes(); \ |
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104 len = name->utf8_length(); \ |
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105 } \ |
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106 HS_DTRACE_PROBE4(hotspot, class__initialization__##type, \ |
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107 data, len, (clss)->class_loader(), thread_type); \ |
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108 } |
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109 |
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110 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ |
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111 { \ |
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112 char* data = NULL; \ |
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113 int len = 0; \ |
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114 Symbol* name = (clss)->name(); \ |
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115 if (name != NULL) { \ |
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116 data = (char*)name->bytes(); \ |
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117 len = name->utf8_length(); \ |
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118 } \ |
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119 HS_DTRACE_PROBE5(hotspot, class__initialization__##type, \ |
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120 data, len, (clss)->class_loader(), thread_type, wait); \ |
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121 } |
4006 | 122 #else /* USDT2 */ |
123 | |
124 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED | |
125 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE | |
126 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT | |
127 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS | |
128 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED | |
129 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT | |
130 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR | |
131 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END | |
132 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ | |
133 { \ | |
134 char* data = NULL; \ | |
135 int len = 0; \ | |
136 Symbol* name = (clss)->name(); \ | |
137 if (name != NULL) { \ | |
138 data = (char*)name->bytes(); \ | |
139 len = name->utf8_length(); \ | |
140 } \ | |
141 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
142 data, len, (clss)->class_loader(), thread_type); \ | |
143 } | |
144 | |
145 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ | |
146 { \ | |
147 char* data = NULL; \ | |
148 int len = 0; \ | |
149 Symbol* name = (clss)->name(); \ | |
150 if (name != NULL) { \ | |
151 data = (char*)name->bytes(); \ | |
152 len = name->utf8_length(); \ | |
153 } \ | |
154 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
155 data, len, (clss)->class_loader(), thread_type, wait); \ | |
156 } | |
157 #endif /* USDT2 */ | |
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158 |
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159 #else // ndef DTRACE_ENABLED |
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160 |
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161 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) |
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162 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) |
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163 |
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164 #endif // ndef DTRACE_ENABLED |
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165 |
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166 volatile int InstanceKlass::_total_instanceKlass_count = 0; |
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167 |
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168 InstanceKlass* InstanceKlass::allocate_instance_klass( |
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169 ClassLoaderData* loader_data, |
8031 | 170 int vtable_len, |
171 int itable_len, | |
172 int static_field_size, | |
173 int nonstatic_oop_map_size, | |
174 ReferenceType rt, | |
175 AccessFlags access_flags, | |
176 Symbol* name, | |
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177 Klass* super_klass, |
8031 | 178 bool is_anonymous, |
179 TRAPS) { | |
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180 |
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181 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
8031 | 182 access_flags.is_interface(), is_anonymous); |
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183 |
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184 // Allocation |
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185 InstanceKlass* ik; |
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186 if (rt == REF_NONE) { |
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187 if (name == vmSymbols::java_lang_Class()) { |
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188 ik = new (loader_data, size, THREAD) InstanceMirrorKlass( |
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189 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 190 access_flags, is_anonymous); |
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191 } else if (name == vmSymbols::java_lang_ClassLoader() || |
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192 (SystemDictionary::ClassLoader_klass_loaded() && |
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193 super_klass != NULL && |
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194 super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass()))) { |
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195 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass( |
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196 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 197 access_flags, is_anonymous); |
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198 } else { |
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199 // normal class |
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200 ik = new (loader_data, size, THREAD) InstanceKlass( |
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201 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 202 access_flags, is_anonymous); |
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203 } |
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204 } else { |
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205 // reference klass |
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206 ik = new (loader_data, size, THREAD) InstanceRefKlass( |
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207 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
8031 | 208 access_flags, is_anonymous); |
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209 } |
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210 |
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211 // Check for pending exception before adding to the loader data and incrementing |
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212 // class count. Can get OOM here. |
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213 if (HAS_PENDING_EXCEPTION) { |
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214 return NULL; |
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215 } |
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216 |
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217 // Add all classes to our internal class loader list here, |
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218 // including classes in the bootstrap (NULL) class loader. |
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219 loader_data->add_class(ik); |
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220 |
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221 Atomic::inc(&_total_instanceKlass_count); |
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222 return ik; |
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223 } |
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224 |
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225 |
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226 // copy method ordering from resource area to Metaspace |
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227 void InstanceKlass::copy_method_ordering(intArray* m, TRAPS) { |
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228 if (m != NULL) { |
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229 // allocate a new array and copy contents (memcpy?) |
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230 _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK); |
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231 for (int i = 0; i < m->length(); i++) { |
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232 _method_ordering->at_put(i, m->at(i)); |
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233 } |
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234 } else { |
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235 _method_ordering = Universe::the_empty_int_array(); |
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236 } |
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237 } |
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238 |
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239 |
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240 InstanceKlass::InstanceKlass(int vtable_len, |
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241 int itable_len, |
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242 int static_field_size, |
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243 int nonstatic_oop_map_size, |
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244 ReferenceType rt, |
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245 AccessFlags access_flags, |
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246 bool is_anonymous) { |
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247 No_Safepoint_Verifier no_safepoint; // until k becomes parsable |
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248 |
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249 int iksize = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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250 access_flags.is_interface(), is_anonymous); |
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251 |
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252 set_vtable_length(vtable_len); |
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253 set_itable_length(itable_len); |
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254 set_static_field_size(static_field_size); |
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255 set_nonstatic_oop_map_size(nonstatic_oop_map_size); |
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256 set_access_flags(access_flags); |
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257 _misc_flags = 0; // initialize to zero |
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258 set_is_anonymous(is_anonymous); |
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259 assert(size() == iksize, "wrong size for object"); |
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260 |
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261 set_array_klasses(NULL); |
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262 set_methods(NULL); |
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263 set_method_ordering(NULL); |
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264 set_local_interfaces(NULL); |
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265 set_transitive_interfaces(NULL); |
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266 init_implementor(); |
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267 set_fields(NULL, 0); |
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268 set_constants(NULL); |
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269 set_class_loader_data(NULL); |
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270 set_protection_domain(NULL); |
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271 set_signers(NULL); |
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272 set_source_file_name(NULL); |
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273 set_source_debug_extension(NULL, 0); |
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274 set_array_name(NULL); |
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275 set_inner_classes(NULL); |
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276 set_static_oop_field_count(0); |
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277 set_nonstatic_field_size(0); |
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278 set_is_marked_dependent(false); |
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279 set_init_state(InstanceKlass::allocated); |
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280 set_init_thread(NULL); |
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281 set_init_lock(NULL); |
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282 set_reference_type(rt); |
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283 set_oop_map_cache(NULL); |
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284 set_jni_ids(NULL); |
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285 set_osr_nmethods_head(NULL); |
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286 set_breakpoints(NULL); |
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287 init_previous_versions(); |
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288 set_generic_signature(NULL); |
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289 release_set_methods_jmethod_ids(NULL); |
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290 release_set_methods_cached_itable_indices(NULL); |
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291 set_annotations(NULL); |
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292 set_jvmti_cached_class_field_map(NULL); |
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293 set_initial_method_idnum(0); |
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294 _dependencies = NULL; |
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295 set_jvmti_cached_class_field_map(NULL); |
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296 set_cached_class_file(NULL, 0); |
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297 set_initial_method_idnum(0); |
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298 set_minor_version(0); |
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299 set_major_version(0); |
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300 NOT_PRODUCT(_verify_count = 0;) |
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301 |
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302 // initialize the non-header words to zero |
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303 intptr_t* p = (intptr_t*)this; |
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304 for (int index = InstanceKlass::header_size(); index < iksize; index++) { |
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305 p[index] = NULL_WORD; |
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306 } |
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307 |
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308 // Set temporary value until parseClassFile updates it with the real instance |
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309 // size. |
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310 set_layout_helper(Klass::instance_layout_helper(0, true)); |
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311 } |
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312 |
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313 |
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314 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data, |
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315 Array<Method*>* methods) { |
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316 if (methods != NULL && methods != Universe::the_empty_method_array()) { |
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317 for (int i = 0; i < methods->length(); i++) { |
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318 Method* method = methods->at(i); |
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319 if (method == NULL) continue; // maybe null if error processing |
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320 // Only want to delete methods that are not executing for RedefineClasses. |
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321 // The previous version will point to them so they're not totally dangling |
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322 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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323 MetadataFactory::free_metadata(loader_data, method); |
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324 } |
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325 MetadataFactory::free_array<Method*>(loader_data, methods); |
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326 } |
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327 } |
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328 |
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329 void InstanceKlass::deallocate_interfaces(ClassLoaderData* loader_data, |
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330 Klass* super_klass, |
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331 Array<Klass*>* local_interfaces, |
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332 Array<Klass*>* transitive_interfaces) { |
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333 // Only deallocate transitive interfaces if not empty, same as super class |
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334 // or same as local interfaces. See code in parseClassFile. |
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335 Array<Klass*>* ti = transitive_interfaces; |
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336 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces) { |
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337 // check that the interfaces don't come from super class |
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338 Array<Klass*>* sti = (super_klass == NULL) ? NULL : |
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339 InstanceKlass::cast(super_klass)->transitive_interfaces(); |
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340 if (ti != sti) { |
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341 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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342 } |
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343 } |
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344 |
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345 // local interfaces can be empty |
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346 if (local_interfaces != Universe::the_empty_klass_array()) { |
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347 MetadataFactory::free_array<Klass*>(loader_data, local_interfaces); |
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348 } |
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349 } |
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350 |
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351 // This function deallocates the metadata and C heap pointers that the |
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352 // InstanceKlass points to. |
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353 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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354 |
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355 // Orphan the mirror first, CMS thinks it's still live. |
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356 if (java_mirror() != NULL) { |
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357 java_lang_Class::set_klass(java_mirror(), NULL); |
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358 } |
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359 |
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360 // Need to take this class off the class loader data list. |
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361 loader_data->remove_class(this); |
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362 |
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363 // The array_klass for this class is created later, after error handling. |
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364 // For class redefinition, we keep the original class so this scratch class |
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365 // doesn't have an array class. Either way, assert that there is nothing |
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366 // to deallocate. |
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367 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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368 |
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369 // Release C heap allocated data that this might point to, which includes |
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370 // reference counting symbol names. |
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371 release_C_heap_structures(); |
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372 |
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373 deallocate_methods(loader_data, methods()); |
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374 set_methods(NULL); |
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375 |
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376 if (method_ordering() != Universe::the_empty_int_array()) { |
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377 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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378 } |
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379 set_method_ordering(NULL); |
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380 |
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381 // This array is in Klass, but remove it with the InstanceKlass since |
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382 // this place would be the only caller and it can share memory with transitive |
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383 // interfaces. |
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384 if (secondary_supers() != Universe::the_empty_klass_array() && |
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385 secondary_supers() != transitive_interfaces()) { |
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386 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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387 } |
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388 set_secondary_supers(NULL); |
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389 |
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390 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces()); |
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391 set_transitive_interfaces(NULL); |
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392 set_local_interfaces(NULL); |
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393 |
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394 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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395 set_fields(NULL, 0); |
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396 |
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397 // If a method from a redefined class is using this constant pool, don't |
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398 // delete it, yet. The new class's previous version will point to this. |
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399 if (constants() != NULL) { |
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400 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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401 MetadataFactory::free_metadata(loader_data, constants()); |
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402 set_constants(NULL); |
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403 } |
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404 |
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405 if (inner_classes() != Universe::the_empty_short_array()) { |
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406 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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407 } |
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408 set_inner_classes(NULL); |
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409 |
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410 // Null out Java heap objects, although these won't be walked to keep |
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411 // alive once this InstanceKlass is deallocated. |
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412 set_protection_domain(NULL); |
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413 set_signers(NULL); |
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414 set_init_lock(NULL); |
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415 |
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416 // We should deallocate the Annotations instance |
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417 MetadataFactory::free_metadata(loader_data, annotations()); |
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418 set_annotations(NULL); |
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419 } |
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420 |
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421 volatile oop InstanceKlass::init_lock() const { |
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422 volatile oop lock = _init_lock; // read once |
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423 assert((oop)lock != NULL || !is_not_initialized(), // initialized or in_error state |
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424 "only fully initialized state can have a null lock"); |
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425 return lock; |
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426 } |
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427 |
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428 // Set the initialization lock to null so the object can be GC'ed. Any racing |
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429 // threads to get this lock will see a null lock and will not lock. |
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430 // That's okay because they all check for initialized state after getting |
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431 // the lock and return. |
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432 void InstanceKlass::fence_and_clear_init_lock() { |
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433 // make sure previous stores are all done, notably the init_state. |
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434 OrderAccess::storestore(); |
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435 klass_oop_store(&_init_lock, NULL); |
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436 assert(!is_not_initialized(), "class must be initialized now"); |
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437 } |
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438 |
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439 |
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440 bool InstanceKlass::should_be_initialized() const { |
0 | 441 return !is_initialized(); |
442 } | |
443 | |
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444 klassVtable* InstanceKlass::vtable() const { |
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445 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
0 | 446 } |
447 | |
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448 klassItable* InstanceKlass::itable() const { |
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449 return new klassItable(instanceKlassHandle(this)); |
0 | 450 } |
451 | |
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452 void InstanceKlass::eager_initialize(Thread *thread) { |
0 | 453 if (!EagerInitialization) return; |
454 | |
455 if (this->is_not_initialized()) { | |
456 // abort if the the class has a class initializer | |
457 if (this->class_initializer() != NULL) return; | |
458 | |
459 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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460 Klass* super = this->super(); |
0 | 461 if (super == NULL) return; |
462 | |
463 // abort if the super class should be initialized | |
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464 if (!InstanceKlass::cast(super)->is_initialized()) return; |
0 | 465 |
466 // call body to expose the this pointer | |
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467 instanceKlassHandle this_oop(thread, this); |
0 | 468 eager_initialize_impl(this_oop); |
469 } | |
470 } | |
471 | |
472 | |
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473 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
0 | 474 EXCEPTION_MARK; |
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475 volatile oop init_lock = this_oop->init_lock(); |
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476 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 477 |
478 // abort if someone beat us to the initialization | |
479 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
480 | |
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481 ClassState old_state = this_oop->init_state(); |
0 | 482 link_class_impl(this_oop, true, THREAD); |
483 if (HAS_PENDING_EXCEPTION) { | |
484 CLEAR_PENDING_EXCEPTION; | |
485 // Abort if linking the class throws an exception. | |
486 | |
487 // Use a test to avoid redundantly resetting the state if there's | |
488 // no change. Set_init_state() asserts that state changes make | |
489 // progress, whereas here we might just be spinning in place. | |
490 if( old_state != this_oop->_init_state ) | |
491 this_oop->set_init_state (old_state); | |
492 } else { | |
493 // linking successfull, mark class as initialized | |
494 this_oop->set_init_state (fully_initialized); | |
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495 this_oop->fence_and_clear_init_lock(); |
0 | 496 // trace |
497 if (TraceClassInitialization) { | |
498 ResourceMark rm(THREAD); | |
499 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
500 } | |
501 } | |
502 } | |
503 | |
504 | |
505 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
506 // process. The step comments refers to the procedure described in that section. | |
507 // Note: implementation moved to static method to expose the this pointer. | |
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508 void InstanceKlass::initialize(TRAPS) { |
0 | 509 if (this->should_be_initialized()) { |
510 HandleMark hm(THREAD); | |
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511 instanceKlassHandle this_oop(THREAD, this); |
0 | 512 initialize_impl(this_oop, CHECK); |
513 // Note: at this point the class may be initialized | |
514 // OR it may be in the state of being initialized | |
515 // in case of recursive initialization! | |
516 } else { | |
517 assert(is_initialized(), "sanity check"); | |
518 } | |
519 } | |
520 | |
521 | |
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522 bool InstanceKlass::verify_code( |
0 | 523 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
524 // 1) Verify the bytecodes | |
525 Verifier::Mode mode = | |
526 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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527 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
0 | 528 } |
529 | |
530 | |
531 // Used exclusively by the shared spaces dump mechanism to prevent | |
532 // classes mapped into the shared regions in new VMs from appearing linked. | |
533 | |
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534 void InstanceKlass::unlink_class() { |
0 | 535 assert(is_linked(), "must be linked"); |
536 _init_state = loaded; | |
537 } | |
538 | |
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539 void InstanceKlass::link_class(TRAPS) { |
0 | 540 assert(is_loaded(), "must be loaded"); |
541 if (!is_linked()) { | |
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542 HandleMark hm(THREAD); |
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543 instanceKlassHandle this_oop(THREAD, this); |
0 | 544 link_class_impl(this_oop, true, CHECK); |
545 } | |
546 } | |
547 | |
548 // Called to verify that a class can link during initialization, without | |
549 // throwing a VerifyError. | |
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550 bool InstanceKlass::link_class_or_fail(TRAPS) { |
0 | 551 assert(is_loaded(), "must be loaded"); |
552 if (!is_linked()) { | |
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553 HandleMark hm(THREAD); |
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554 instanceKlassHandle this_oop(THREAD, this); |
0 | 555 link_class_impl(this_oop, false, CHECK_false); |
556 } | |
557 return is_linked(); | |
558 } | |
559 | |
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560 bool InstanceKlass::link_class_impl( |
0 | 561 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
562 // check for error state | |
563 if (this_oop->is_in_error_state()) { | |
564 ResourceMark rm(THREAD); | |
565 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
566 this_oop->external_name(), false); | |
567 } | |
568 // return if already verified | |
569 if (this_oop->is_linked()) { | |
570 return true; | |
571 } | |
572 | |
573 // Timing | |
574 // timer handles recursion | |
575 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
576 JavaThread* jt = (JavaThread*)THREAD; | |
577 | |
578 // link super class before linking this class | |
579 instanceKlassHandle super(THREAD, this_oop->super()); | |
580 if (super.not_null()) { | |
581 if (super->is_interface()) { // check if super class is an interface | |
582 ResourceMark rm(THREAD); | |
583 Exceptions::fthrow( | |
584 THREAD_AND_LOCATION, | |
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585 vmSymbols::java_lang_IncompatibleClassChangeError(), |
0 | 586 "class %s has interface %s as super class", |
587 this_oop->external_name(), | |
588 super->external_name() | |
589 ); | |
590 return false; | |
591 } | |
592 | |
593 link_class_impl(super, throw_verifyerror, CHECK_false); | |
594 } | |
595 | |
596 // link all interfaces implemented by this class before linking this class | |
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597 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
0 | 598 int num_interfaces = interfaces->length(); |
599 for (int index = 0; index < num_interfaces; index++) { | |
600 HandleMark hm(THREAD); | |
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601 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
0 | 602 link_class_impl(ih, throw_verifyerror, CHECK_false); |
603 } | |
604 | |
605 // in case the class is linked in the process of linking its superclasses | |
606 if (this_oop->is_linked()) { | |
607 return true; | |
608 } | |
609 | |
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610 // trace only the link time for this klass that includes |
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611 // the verification time |
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612 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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613 ClassLoader::perf_class_link_selftime(), |
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614 ClassLoader::perf_classes_linked(), |
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615 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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616 jt->get_thread_stat()->perf_timers_addr(), |
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617 PerfClassTraceTime::CLASS_LINK); |
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618 |
0 | 619 // verification & rewriting |
620 { | |
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621 volatile oop init_lock = this_oop->init_lock(); |
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622 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 623 // rewritten will have been set if loader constraint error found |
624 // on an earlier link attempt | |
625 // don't verify or rewrite if already rewritten | |
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626 |
0 | 627 if (!this_oop->is_linked()) { |
628 if (!this_oop->is_rewritten()) { | |
629 { | |
630 // Timer includes any side effects of class verification (resolution, | |
631 // etc), but not recursive entry into verify_code(). | |
875
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632 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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633 ClassLoader::perf_class_verify_selftime(), |
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634 ClassLoader::perf_classes_verified(), |
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635 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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636 jt->get_thread_stat()->perf_timers_addr(), |
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637 PerfClassTraceTime::CLASS_VERIFY); |
0 | 638 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
639 if (!verify_ok) { | |
640 return false; | |
641 } | |
642 } | |
643 | |
644 // Just in case a side-effect of verify linked this class already | |
645 // (which can sometimes happen since the verifier loads classes | |
646 // using custom class loaders, which are free to initialize things) | |
647 if (this_oop->is_linked()) { | |
648 return true; | |
649 } | |
650 | |
651 // also sets rewritten | |
652 this_oop->rewrite_class(CHECK_false); | |
653 } | |
654 | |
3404 | 655 // relocate jsrs and link methods after they are all rewritten |
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656 this_oop->link_methods(CHECK_false); |
3404 | 657 |
0 | 658 // Initialize the vtable and interface table after |
659 // methods have been rewritten since rewrite may | |
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660 // fabricate new Method*s. |
0 | 661 // also does loader constraint checking |
662 if (!this_oop()->is_shared()) { | |
663 ResourceMark rm(THREAD); | |
664 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
665 this_oop->itable()->initialize_itable(true, CHECK_false); | |
666 } | |
667 #ifdef ASSERT | |
668 else { | |
669 ResourceMark rm(THREAD); | |
670 this_oop->vtable()->verify(tty, true); | |
671 // In case itable verification is ever added. | |
672 // this_oop->itable()->verify(tty, true); | |
673 } | |
674 #endif | |
675 this_oop->set_init_state(linked); | |
676 if (JvmtiExport::should_post_class_prepare()) { | |
677 Thread *thread = THREAD; | |
678 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
679 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
680 } | |
681 } | |
682 } | |
683 return true; | |
684 } | |
685 | |
686 | |
687 // Rewrite the byte codes of all of the methods of a class. | |
688 // The rewriter must be called exactly once. Rewriting must happen after | |
689 // verification but before the first method of the class is executed. | |
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690 void InstanceKlass::rewrite_class(TRAPS) { |
0 | 691 assert(is_loaded(), "must be loaded"); |
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692 instanceKlassHandle this_oop(THREAD, this); |
0 | 693 if (this_oop->is_rewritten()) { |
694 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
695 return; | |
696 } | |
3404 | 697 Rewriter::rewrite(this_oop, CHECK); |
0 | 698 this_oop->set_rewritten(); |
699 } | |
700 | |
3404 | 701 // Now relocate and link method entry points after class is rewritten. |
702 // This is outside is_rewritten flag. In case of an exception, it can be | |
703 // executed more than once. | |
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704 void InstanceKlass::link_methods(TRAPS) { |
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705 int len = methods()->length(); |
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706 for (int i = len-1; i >= 0; i--) { |
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707 methodHandle m(THREAD, methods()->at(i)); |
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708 |
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709 // Set up method entry points for compiler and interpreter . |
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710 m->link_method(m, CHECK); |
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711 |
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712 // This is for JVMTI and unrelated to relocator but the last thing we do |
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713 #ifdef ASSERT |
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714 if (StressMethodComparator) { |
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715 ResourceMark rm(THREAD); |
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716 static int nmc = 0; |
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717 for (int j = i; j >= 0 && j >= i-4; j--) { |
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718 if ((++nmc % 1000) == 0) tty->print_cr("Have run MethodComparator %d times...", nmc); |
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719 bool z = MethodComparator::methods_EMCP(m(), |
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720 methods()->at(j)); |
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721 if (j == i && !z) { |
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722 tty->print("MethodComparator FAIL: "); m->print(); m->print_codes(); |
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723 assert(z, "method must compare equal to itself"); |
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724 } |
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725 } |
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726 } |
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727 #endif //ASSERT |
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728 } |
3404 | 729 } |
730 | |
0 | 731 |
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732 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
0 | 733 // Make sure klass is linked (verified) before initialization |
734 // A class could already be verified, since it has been reflected upon. | |
735 this_oop->link_class(CHECK); | |
736 | |
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737 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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738 |
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739 bool wait = false; |
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740 |
0 | 741 // refer to the JVM book page 47 for description of steps |
742 // Step 1 | |
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743 { |
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744 volatile oop init_lock = this_oop->init_lock(); |
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745 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 746 |
747 Thread *self = THREAD; // it's passed the current thread | |
748 | |
749 // Step 2 | |
750 // If we were to use wait() instead of waitInterruptibly() then | |
751 // we might end up throwing IE from link/symbol resolution sites | |
752 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
753 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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754 wait = true; |
0 | 755 ol.waitUninterruptibly(CHECK); |
756 } | |
757 | |
758 // Step 3 | |
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759 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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760 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 761 return; |
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762 } |
0 | 763 |
764 // Step 4 | |
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765 if (this_oop->is_initialized()) { |
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766 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 767 return; |
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768 } |
0 | 769 |
770 // Step 5 | |
771 if (this_oop->is_in_error_state()) { | |
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772 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 773 ResourceMark rm(THREAD); |
774 const char* desc = "Could not initialize class "; | |
775 const char* className = this_oop->external_name(); | |
776 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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777 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 778 if (NULL == message) { |
779 // Out of memory: can't create detailed error message | |
780 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
781 } else { | |
782 jio_snprintf(message, msglen, "%s%s", desc, className); | |
783 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
784 } | |
785 } | |
786 | |
787 // Step 6 | |
788 this_oop->set_init_state(being_initialized); | |
789 this_oop->set_init_thread(self); | |
790 } | |
791 | |
792 // Step 7 | |
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793 Klass* super_klass = this_oop->super(); |
6983 | 794 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
795 super_klass->initialize(THREAD); | |
0 | 796 |
797 if (HAS_PENDING_EXCEPTION) { | |
798 Handle e(THREAD, PENDING_EXCEPTION); | |
799 CLEAR_PENDING_EXCEPTION; | |
800 { | |
801 EXCEPTION_MARK; | |
802 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
803 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
804 } | |
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805 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 806 THROW_OOP(e()); |
807 } | |
808 } | |
809 | |
6934 | 810 if (this_oop->has_default_methods()) { |
811 // Step 7.5: initialize any interfaces which have default methods | |
812 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
813 Klass* iface = this_oop->local_interfaces()->at(i); | |
814 InstanceKlass* ik = InstanceKlass::cast(iface); | |
815 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
816 ik->initialize(THREAD); | |
817 | |
818 if (HAS_PENDING_EXCEPTION) { | |
819 Handle e(THREAD, PENDING_EXCEPTION); | |
820 CLEAR_PENDING_EXCEPTION; | |
821 { | |
822 EXCEPTION_MARK; | |
823 // Locks object, set state, and notify all waiting threads | |
824 this_oop->set_initialization_state_and_notify( | |
825 initialization_error, THREAD); | |
826 | |
827 // ignore any exception thrown, superclass initialization error is | |
828 // thrown below | |
829 CLEAR_PENDING_EXCEPTION; | |
830 } | |
831 DTRACE_CLASSINIT_PROBE_WAIT( | |
832 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
833 THROW_OOP(e()); | |
834 } | |
835 } | |
836 } | |
837 } | |
838 | |
0 | 839 // Step 8 |
840 { | |
841 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
842 JavaThread* jt = (JavaThread*)THREAD; | |
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843 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 844 // Timer includes any side effects of class initialization (resolution, |
845 // etc), but not recursive entry into call_class_initializer(). | |
875
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846 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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847 ClassLoader::perf_class_init_selftime(), |
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848 ClassLoader::perf_classes_inited(), |
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849 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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850 jt->get_thread_stat()->perf_timers_addr(), |
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851 PerfClassTraceTime::CLASS_CLINIT); |
0 | 852 this_oop->call_class_initializer(THREAD); |
853 } | |
854 | |
855 // Step 9 | |
856 if (!HAS_PENDING_EXCEPTION) { | |
857 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
858 { ResourceMark rm(THREAD); | |
859 debug_only(this_oop->vtable()->verify(tty, true);) | |
860 } | |
861 } | |
862 else { | |
863 // Step 10 and 11 | |
864 Handle e(THREAD, PENDING_EXCEPTION); | |
865 CLEAR_PENDING_EXCEPTION; | |
866 { | |
867 EXCEPTION_MARK; | |
868 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
869 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
870 } | |
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871 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
1142 | 872 if (e->is_a(SystemDictionary::Error_klass())) { |
0 | 873 THROW_OOP(e()); |
874 } else { | |
875 JavaCallArguments args(e); | |
2177
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876 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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877 vmSymbols::throwable_void_signature(), |
0 | 878 &args); |
879 } | |
880 } | |
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881 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
0 | 882 } |
883 | |
884 | |
885 // Note: implementation moved to static method to expose the this pointer. | |
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886 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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887 instanceKlassHandle kh(THREAD, this); |
0 | 888 set_initialization_state_and_notify_impl(kh, state, CHECK); |
889 } | |
890 | |
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891 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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892 volatile oop init_lock = this_oop->init_lock(); |
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893 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
0 | 894 this_oop->set_init_state(state); |
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895 this_oop->fence_and_clear_init_lock(); |
0 | 896 ol.notify_all(CHECK); |
897 } | |
898 | |
5998
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899 // The embedded _implementor field can only record one implementor. |
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900 // When there are more than one implementors, the _implementor field |
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901 // is set to the interface Klass* itself. Following are the possible |
5998
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902 // values for the _implementor field: |
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903 // NULL - no implementor |
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904 // implementor Klass* - one implementor |
5998
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905 // self - more than one implementor |
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906 // |
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907 // The _implementor field only exists for interfaces. |
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908 void InstanceKlass::add_implementor(Klass* k) { |
0 | 909 assert(Compile_lock->owned_by_self(), ""); |
5998
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910 assert(is_interface(), "not interface"); |
0 | 911 // Filter out my subinterfaces. |
912 // (Note: Interfaces are never on the subklass list.) | |
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913 if (InstanceKlass::cast(k)->is_interface()) return; |
0 | 914 |
915 // Filter out subclasses whose supers already implement me. | |
916 // (Note: CHA must walk subclasses of direct implementors | |
917 // in order to locate indirect implementors.) | |
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918 Klass* sk = InstanceKlass::cast(k)->super(); |
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919 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
0 | 920 // We only need to check one immediate superclass, since the |
921 // implements_interface query looks at transitive_interfaces. | |
922 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
923 return; | |
924 | |
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925 Klass* ik = implementor(); |
5998
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926 if (ik == NULL) { |
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927 set_implementor(k); |
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928 } else if (ik != this) { |
5998
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929 // There is already an implementor. Use itself as an indicator of |
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930 // more than one implementors. |
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931 set_implementor(this); |
0 | 932 } |
933 | |
934 // The implementor also implements the transitive_interfaces | |
935 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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936 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
0 | 937 } |
938 } | |
939 | |
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940 void InstanceKlass::init_implementor() { |
5998
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941 if (is_interface()) { |
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942 set_implementor(NULL); |
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943 } |
0 | 944 } |
945 | |
946 | |
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947 void InstanceKlass::process_interfaces(Thread *thread) { |
0 | 948 // link this class into the implementors list of every interface it implements |
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949 Klass* this_as_klass_oop = this; |
0 | 950 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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951 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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952 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
0 | 953 assert(interf->is_interface(), "expected interface"); |
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954 interf->add_implementor(this_as_klass_oop); |
0 | 955 } |
956 } | |
957 | |
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958 bool InstanceKlass::can_be_primary_super_slow() const { |
0 | 959 if (is_interface()) |
960 return false; | |
961 else | |
962 return Klass::can_be_primary_super_slow(); | |
963 } | |
964 | |
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965 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
0 | 966 // The secondaries are the implemented interfaces. |
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967 InstanceKlass* ik = InstanceKlass::cast(this); |
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968 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
0 | 969 int num_secondaries = num_extra_slots + interfaces->length(); |
970 if (num_secondaries == 0) { | |
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971 // Must share this for correct bootstrapping! |
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972 set_secondary_supers(Universe::the_empty_klass_array()); |
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973 return NULL; |
0 | 974 } else if (num_extra_slots == 0) { |
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975 // The secondary super list is exactly the same as the transitive interfaces. |
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976 // Redefine classes has to be careful not to delete this! |
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977 set_secondary_supers(interfaces); |
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978 return NULL; |
0 | 979 } else { |
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980 // Copy transitive interfaces to a temporary growable array to be constructed |
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981 // into the secondary super list with extra slots. |
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982 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
0 | 983 for (int i = 0; i < interfaces->length(); i++) { |
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984 secondaries->push(interfaces->at(i)); |
0 | 985 } |
986 return secondaries; | |
987 } | |
988 } | |
989 | |
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990 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
6983 | 991 if (k->is_interface()) { |
0 | 992 return implements_interface(k); |
993 } else { | |
994 return Klass::compute_is_subtype_of(k); | |
995 } | |
996 } | |
997 | |
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998 bool InstanceKlass::implements_interface(Klass* k) const { |
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999 if (this == k) return true; |
6983 | 1000 assert(k->is_interface(), "should be an interface class"); |
0 | 1001 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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1002 if (transitive_interfaces()->at(i) == k) { |
0 | 1003 return true; |
1004 } | |
1005 } | |
1006 return false; | |
1007 } | |
1008 | |
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1009 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
0 | 1010 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
1011 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
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1012 report_java_out_of_memory("Requested array size exceeds VM limit"); |
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1013 JvmtiExport::post_array_size_exhausted(); |
0 | 1014 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
1015 } | |
1016 int size = objArrayOopDesc::object_size(length); | |
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1017 Klass* ak = array_klass(n, CHECK_NULL); |
0 | 1018 KlassHandle h_ak (THREAD, ak); |
1019 objArrayOop o = | |
1020 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
1021 return o; | |
1022 } | |
1023 | |
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1024 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
0 | 1025 if (TraceFinalizerRegistration) { |
1026 tty->print("Registered "); | |
1027 i->print_value_on(tty); | |
1028 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
1029 } | |
1030 instanceHandle h_i(THREAD, i); | |
1031 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
1032 JavaValue result(T_VOID); | |
1033 JavaCallArguments args(h_i); | |
1034 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
1035 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
1036 return h_i(); | |
1037 } | |
1038 | |
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1039 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
0 | 1040 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
1041 int size = size_helper(); // Query before forming handle. | |
1042 | |
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1043 KlassHandle h_k(THREAD, this); |
0 | 1044 |
1045 instanceOop i; | |
1046 | |
1047 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
1048 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
1049 i = register_finalizer(i, CHECK_NULL); | |
1050 } | |
1051 return i; | |
1052 } | |
1053 | |
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1054 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
0 | 1055 if (is_interface() || is_abstract()) { |
1056 ResourceMark rm(THREAD); | |
1057 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
1058 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
1059 } | |
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1060 if (this == SystemDictionary::Class_klass()) { |
0 | 1061 ResourceMark rm(THREAD); |
1062 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
1063 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
1064 } | |
1065 } | |
1066 | |
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1067 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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1068 instanceKlassHandle this_oop(THREAD, this); |
0 | 1069 return array_klass_impl(this_oop, or_null, n, THREAD); |
1070 } | |
1071 | |
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1072 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
0 | 1073 if (this_oop->array_klasses() == NULL) { |
1074 if (or_null) return NULL; | |
1075 | |
1076 ResourceMark rm; | |
1077 JavaThread *jt = (JavaThread *)THREAD; | |
1078 { | |
1079 // Atomic creation of array_klasses | |
1080 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
1081 MutexLocker ma(MultiArray_lock, THREAD); | |
1082 | |
1083 // Check if update has already taken place | |
1084 if (this_oop->array_klasses() == NULL) { | |
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1085 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
0 | 1086 this_oop->set_array_klasses(k); |
1087 } | |
1088 } | |
1089 } | |
1090 // _this will always be set at this point | |
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1091 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
0 | 1092 if (or_null) { |
1093 return oak->array_klass_or_null(n); | |
1094 } | |
1095 return oak->array_klass(n, CHECK_NULL); | |
1096 } | |
1097 | |
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1098 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
0 | 1099 return array_klass_impl(or_null, 1, THREAD); |
1100 } | |
1101 | |
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1102 void InstanceKlass::call_class_initializer(TRAPS) { |
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1103 instanceKlassHandle ik (THREAD, this); |
0 | 1104 call_class_initializer_impl(ik, THREAD); |
1105 } | |
1106 | |
1107 static int call_class_initializer_impl_counter = 0; // for debugging | |
1108 | |
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1109 Method* InstanceKlass::class_initializer() { |
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1110 Method* clinit = find_method( |
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1111 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1112 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1113 return clinit; |
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1114 } |
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1115 return NULL; |
0 | 1116 } |
1117 | |
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1118 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1119 if (ReplayCompiles && |
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1120 (ReplaySuppressInitializers == 1 || |
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1121 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1122 // Hide the existence of the initializer for the purpose of replaying the compile |
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1123 return; |
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1124 } |
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1125 |
0 | 1126 methodHandle h_method(THREAD, this_oop->class_initializer()); |
1127 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
1128 if (TraceClassInitialization) { | |
1129 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
1130 this_oop->name()->print_value(); | |
1131 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
1132 } | |
1133 if (h_method() != NULL) { | |
1134 JavaCallArguments args; // No arguments | |
1135 JavaValue result(T_VOID); | |
1136 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
1137 } | |
1138 } | |
1139 | |
1140 | |
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1141 void InstanceKlass::mask_for(methodHandle method, int bci, |
0 | 1142 InterpreterOopMap* entry_for) { |
1143 // Dirty read, then double-check under a lock. | |
1144 if (_oop_map_cache == NULL) { | |
1145 // Otherwise, allocate a new one. | |
1146 MutexLocker x(OopMapCacheAlloc_lock); | |
1147 // First time use. Allocate a cache in C heap | |
1148 if (_oop_map_cache == NULL) { | |
1149 _oop_map_cache = new OopMapCache(); | |
1150 } | |
1151 } | |
1152 // _oop_map_cache is constant after init; lookup below does is own locking. | |
1153 _oop_map_cache->lookup(method, bci, entry_for); | |
1154 } | |
1155 | |
1156 | |
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1157 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1158 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1159 Symbol* f_name = fs.name(); |
1160 Symbol* f_sig = fs.signature(); | |
0 | 1161 if (f_name == name && f_sig == sig) { |
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1162 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1163 return true; |
1164 } | |
1165 } | |
1166 return false; | |
1167 } | |
1168 | |
1169 | |
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1170 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1171 const int n = local_interfaces()->length(); |
1172 for (int i = 0; i < n; i++) { | |
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1173 Klass* intf1 = local_interfaces()->at(i); |
6983 | 1174 assert(intf1->is_interface(), "just checking type"); |
0 | 1175 // search for field in current interface |
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1176 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
0 | 1177 assert(fd->is_static(), "interface field must be static"); |
1178 return intf1; | |
1179 } | |
1180 // search for field in direct superinterfaces | |
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1181 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
0 | 1182 if (intf2 != NULL) return intf2; |
1183 } | |
1184 // otherwise field lookup fails | |
1185 return NULL; | |
1186 } | |
1187 | |
1188 | |
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1189 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
0 | 1190 // search order according to newest JVM spec (5.4.3.2, p.167). |
1191 // 1) search for field in current klass | |
1192 if (find_local_field(name, sig, fd)) { | |
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1193 return const_cast<InstanceKlass*>(this); |
0 | 1194 } |
1195 // 2) search for field recursively in direct superinterfaces | |
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1196 { Klass* intf = find_interface_field(name, sig, fd); |
0 | 1197 if (intf != NULL) return intf; |
1198 } | |
1199 // 3) apply field lookup recursively if superclass exists | |
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1200 { Klass* supr = super(); |
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1201 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
0 | 1202 } |
1203 // 4) otherwise field lookup fails | |
1204 return NULL; | |
1205 } | |
1206 | |
1207 | |
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1208 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
0 | 1209 // search order according to newest JVM spec (5.4.3.2, p.167). |
1210 // 1) search for field in current klass | |
1211 if (find_local_field(name, sig, fd)) { | |
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1212 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
0 | 1213 } |
1214 // 2) search for field recursively in direct superinterfaces | |
1215 if (is_static) { | |
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1216 Klass* intf = find_interface_field(name, sig, fd); |
0 | 1217 if (intf != NULL) return intf; |
1218 } | |
1219 // 3) apply field lookup recursively if superclass exists | |
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1220 { Klass* supr = super(); |
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1221 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
0 | 1222 } |
1223 // 4) otherwise field lookup fails | |
1224 return NULL; | |
1225 } | |
1226 | |
1227 | |
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1228 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1229 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
3938 | 1230 if (fs.offset() == offset) { |
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1231 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
0 | 1232 if (fd->is_static() == is_static) return true; |
1233 } | |
1234 } | |
1235 return false; | |
1236 } | |
1237 | |
1238 | |
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1239 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1240 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1241 while (klass != NULL) { |
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1242 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
0 | 1243 return true; |
1244 } | |
6983 | 1245 klass = klass->super(); |
0 | 1246 } |
1247 return false; | |
1248 } | |
1249 | |
1250 | |
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1251 void InstanceKlass::methods_do(void f(Method* method)) { |
0 | 1252 int len = methods()->length(); |
1253 for (int index = 0; index < len; index++) { | |
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1254 Method* m = methods()->at(index); |
0 | 1255 assert(m->is_method(), "must be method"); |
1256 f(m); | |
1257 } | |
1258 } | |
1259 | |
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1261 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
3938 | 1262 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
1263 if (fs.access_flags().is_static()) { | |
1264 fieldDescriptor fd; | |
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1265 fd.initialize(this, fs.index()); |
3938 | 1266 cl->do_field(&fd); |
1267 } | |
0 | 1268 } |
1269 } | |
1270 | |
1271 | |
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1272 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1273 instanceKlassHandle h_this(THREAD, this); |
0 | 1274 do_local_static_fields_impl(h_this, f, CHECK); |
1275 } | |
1276 | |
1277 | |
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1278 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
3938 | 1279 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
1280 if (fs.access_flags().is_static()) { | |
1281 fieldDescriptor fd; | |
1282 fd.initialize(this_oop(), fs.index()); | |
1283 f(&fd, CHECK); | |
1284 } | |
0 | 1285 } |
1286 } | |
1287 | |
1288 | |
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1289 static int compare_fields_by_offset(int* a, int* b) { |
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1290 return a[0] - b[0]; |
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1291 } |
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1292 |
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1293 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1294 InstanceKlass* super = superklass(); |
0 | 1295 if (super != NULL) { |
1296 super->do_nonstatic_fields(cl); | |
1297 } | |
44
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1298 fieldDescriptor fd; |
3938 | 1299 int length = java_fields_count(); |
44
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1300 // In DebugInfo nonstatic fields are sorted by offset. |
6197 | 1301 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
44
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1302 int j = 0; |
3938 | 1303 for (int i = 0; i < length; i += 1) { |
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1304 fd.initialize(this, i); |
44
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1305 if (!fd.is_static()) { |
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1306 fields_sorted[j + 0] = fd.offset(); |
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1307 fields_sorted[j + 1] = i; |
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1308 j += 2; |
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1309 } |
0 | 1310 } |
44
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1311 if (j > 0) { |
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1312 length = j; |
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1313 // _sort_Fn is defined in growableArray.hpp. |
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1314 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1315 for (int i = 0; i < length; i += 2) { |
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1316 fd.initialize(this, fields_sorted[i + 1]); |
44
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1317 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1318 cl->do_field(&fd); |
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1319 } |
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1320 } |
6197 | 1321 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
0 | 1322 } |
1323 | |
1324 | |
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1325 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1326 if (array_klasses() != NULL) |
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1327 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1328 } |
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1329 |
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1330 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
0 | 1331 if (array_klasses() != NULL) |
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1332 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
0 | 1333 } |
1334 | |
1335 | |
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1336 void InstanceKlass::with_array_klasses_do(void f(Klass* k)) { |
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1337 f(this); |
0 | 1338 array_klasses_do(f); |
1339 } | |
1340 | |
1341 #ifdef ASSERT | |
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1342 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
0 | 1343 int len = methods->length(); |
1344 for (int index = 0; index < len; index++) { | |
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1345 Method* m = methods->at(index); |
0 | 1346 assert(m->is_method(), "must be method"); |
1347 if (m->signature() == signature && m->name() == name) { | |
1348 return index; | |
1349 } | |
1350 } | |
1351 return -1; | |
1352 } | |
1353 #endif | |
1354 | |
6934 | 1355 static int binary_search(Array<Method*>* methods, Symbol* name) { |
0 | 1356 int len = methods->length(); |
1357 // methods are sorted, so do binary search | |
1358 int l = 0; | |
1359 int h = len - 1; | |
1360 while (l <= h) { | |
1361 int mid = (l + h) >> 1; | |
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1362 Method* m = methods->at(mid); |
0 | 1363 assert(m->is_method(), "must be method"); |
1364 int res = m->name()->fast_compare(name); | |
1365 if (res == 0) { | |
6934 | 1366 return mid; |
0 | 1367 } else if (res < 0) { |
1368 l = mid + 1; | |
1369 } else { | |
1370 h = mid - 1; | |
1371 } | |
1372 } | |
6934 | 1373 return -1; |
1374 } | |
1375 | |
1376 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
1377 return InstanceKlass::find_method(methods(), name, signature); | |
1378 } | |
1379 | |
1380 Method* InstanceKlass::find_method( | |
1381 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
1382 int hit = binary_search(methods, name); | |
1383 if (hit != -1) { | |
1384 Method* m = methods->at(hit); | |
1385 // Do linear search to find matching signature. First, quick check | |
1386 // for common case | |
1387 if (m->signature() == signature) return m; | |
1388 // search downwards through overloaded methods | |
1389 int i; | |
1390 for (i = hit - 1; i >= 0; --i) { | |
1391 Method* m = methods->at(i); | |
1392 assert(m->is_method(), "must be method"); | |
1393 if (m->name() != name) break; | |
1394 if (m->signature() == signature) return m; | |
1395 } | |
1396 // search upwards | |
1397 for (i = hit + 1; i < methods->length(); ++i) { | |
1398 Method* m = methods->at(i); | |
1399 assert(m->is_method(), "must be method"); | |
1400 if (m->name() != name) break; | |
1401 if (m->signature() == signature) return m; | |
1402 } | |
1403 // not found | |
0 | 1404 #ifdef ASSERT |
6934 | 1405 int index = linear_search(methods, name, signature); |
1406 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
0 | 1407 #endif |
6934 | 1408 } |
0 | 1409 return NULL; |
1410 } | |
1411 | |
6934 | 1412 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
1413 return find_method_by_name(methods(), name, end); | |
1414 } | |
1415 | |
1416 int InstanceKlass::find_method_by_name( | |
1417 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
1418 assert(end_ptr != NULL, "just checking"); | |
1419 int start = binary_search(methods, name); | |
1420 int end = start + 1; | |
1421 if (start != -1) { | |
1422 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
1423 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
1424 *end_ptr = end; | |
1425 return start; | |
1426 } | |
1427 return -1; | |
1428 } | |
1429 | |
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1430 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1431 Klass* klass = const_cast<InstanceKlass*>(this); |
0 | 1432 while (klass != NULL) { |
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1433 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
0 | 1434 if (method != NULL) return method; |
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1435 klass = InstanceKlass::cast(klass)->super(); |
0 | 1436 } |
1437 return NULL; | |
1438 } | |
1439 | |
1440 // lookup a method in all the interfaces that this class implements | |
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1441 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
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1442 Symbol* signature) const { |
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1443 Array<Klass*>* all_ifs = transitive_interfaces(); |
0 | 1444 int num_ifs = all_ifs->length(); |
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1445 InstanceKlass *ik = NULL; |
0 | 1446 for (int i = 0; i < num_ifs; i++) { |
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1447 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1448 Method* m = ik->lookup_method(name, signature); |
0 | 1449 if (m != NULL) { |
1450 return m; | |
1451 } | |
1452 } | |
1453 return NULL; | |
1454 } | |
1455 | |
1456 /* jni_id_for_impl for jfieldIds only */ | |
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1457 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
0 | 1458 MutexLocker ml(JfieldIdCreation_lock); |
1459 // Retry lookup after we got the lock | |
1460 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
1461 if (probe == NULL) { | |
1462 // Slow case, allocate new static field identifier | |
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1463 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
0 | 1464 this_oop->set_jni_ids(probe); |
1465 } | |
1466 return probe; | |
1467 } | |
1468 | |
1469 | |
1470 /* jni_id_for for jfieldIds only */ | |
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1471 JNIid* InstanceKlass::jni_id_for(int offset) { |
0 | 1472 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
1473 if (probe == NULL) { | |
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1474 probe = jni_id_for_impl(this, offset); |
0 | 1475 } |
1476 return probe; | |
1477 } | |
1478 | |
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1479 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1480 Array<jushort>* inner_class_list = inner_classes(); |
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1481 if (inner_class_list == NULL) { |
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1482 return 0; |
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1483 } |
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1484 int length = inner_class_list->length(); |
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1485 if (length % inner_class_next_offset == 0) { |
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1486 return 0; |
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1487 } else { |
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1488 int index = length - enclosing_method_attribute_size; |
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1489 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1490 return inner_class_list->at(index + offset); |
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1491 } |
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1492 } |
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1493 |
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1494 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
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1495 u2 method_index) { |
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1496 Array<jushort>* inner_class_list = inner_classes(); |
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1497 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1498 int length = inner_class_list->length(); |
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1499 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1500 int index = length - enclosing_method_attribute_size; |
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1501 inner_class_list->at_put( |
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1502 index + enclosing_method_class_index_offset, class_index); |
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1503 inner_class_list->at_put( |
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1504 index + enclosing_method_method_index_offset, method_index); |
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1505 } |
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1506 } |
0 | 1507 |
1508 // Lookup or create a jmethodID. | |
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1509 // This code is called by the VMThread and JavaThreads so the |
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1510 // locking has to be done very carefully to avoid deadlocks |
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1511 // and/or other cache consistency problems. |
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1512 // |
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1513 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
0 | 1514 size_t idnum = (size_t)method_h->method_idnum(); |
1515 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
1516 size_t length = 0; | |
1517 jmethodID id = NULL; | |
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1518 |
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1519 // We use a double-check locking idiom here because this cache is |
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1520 // performance sensitive. In the normal system, this cache only |
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1521 // transitions from NULL to non-NULL which is safe because we use |
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1522 // release_set_methods_jmethod_ids() to advertise the new cache. |
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1523 // A partially constructed cache should never be seen by a racing |
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1524 // thread. We also use release_store_ptr() to save a new jmethodID |
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1525 // in the cache so a partially constructed jmethodID should never be |
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1526 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1527 // lock, but cache writes of a new jmethodID requires uniqueness and |
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1528 // creation of the cache itself requires no leaks so a lock is |
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1529 // generally acquired in those two cases. |
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1530 // |
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1531 // If the RedefineClasses() API has been used, then this cache can |
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1532 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1533 // Cache creation requires no leaks and we require safety between all |
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1534 // cache accesses and freeing of the old cache so a lock is generally |
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1535 // acquired when the RedefineClasses() API has been used. |
0 | 1536 |
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1537 if (jmeths != NULL) { |
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1538 // the cache already exists |
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1539 if (!ik_h->idnum_can_increment()) { |
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1540 // the cache can't grow so we can just get the current values |
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1541 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1542 } else { |
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1543 // cache can grow so we have to be more careful |
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1544 if (Threads::number_of_threads() == 0 || |
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1545 SafepointSynchronize::is_at_safepoint()) { |
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1546 // we're single threaded or at a safepoint - no locking needed |
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1547 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1548 } else { |
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1549 MutexLocker ml(JmethodIdCreation_lock); |
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1550 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1551 } |
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1552 } |
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1553 } |
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1554 // implied else: |
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1555 // we need to allocate a cache so default length and id values are good |
0 | 1556 |
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1557 if (jmeths == NULL || // no cache yet |
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1558 length <= idnum || // cache is too short |
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1559 id == NULL) { // cache doesn't contain entry |
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1560 |
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1561 // This function can be called by the VMThread so we have to do all |
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1562 // things that might block on a safepoint before grabbing the lock. |
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1563 // Otherwise, we can deadlock with the VMThread or have a cache |
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1564 // consistency issue. These vars keep track of what we might have |
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1565 // to free after the lock is dropped. |
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1566 jmethodID to_dealloc_id = NULL; |
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1567 jmethodID* to_dealloc_jmeths = NULL; |
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1568 |
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1569 // may not allocate new_jmeths or use it if we allocate it |
0 | 1570 jmethodID* new_jmeths = NULL; |
1571 if (length <= idnum) { | |
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1572 // allocate a new cache that might be used |
0 | 1573 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
6197 | 1574 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
0 | 1575 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
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1576 // cache size is stored in element[0], other elements offset by one |
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1577 new_jmeths[0] = (jmethodID)size; |
0 | 1578 } |
1579 | |
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1580 // allocate a new jmethodID that might be used |
0 | 1581 jmethodID new_id = NULL; |
1582 if (method_h->is_old() && !method_h->is_obsolete()) { | |
1583 // The method passed in is old (but not obsolete), we need to use the current version | |
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1584 Method* current_method = ik_h->method_with_idnum((int)idnum); |
0 | 1585 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
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1586 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
0 | 1587 } else { |
1588 // It is the current version of the method or an obsolete method, | |
1589 // use the version passed in | |
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1590 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
0 | 1591 } |
1592 | |
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1593 if (Threads::number_of_threads() == 0 || |
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1594 SafepointSynchronize::is_at_safepoint()) { |
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1595 // we're single threaded or at a safepoint - no locking needed |
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1596 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1597 &to_dealloc_id, &to_dealloc_jmeths); |
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1598 } else { |
0 | 1599 MutexLocker ml(JmethodIdCreation_lock); |
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1600 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1601 &to_dealloc_id, &to_dealloc_jmeths); |
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1602 } |
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1603 |
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1604 // The lock has been dropped so we can free resources. |
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1605 // Free up either the old cache or the new cache if we allocated one. |
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1606 if (to_dealloc_jmeths != NULL) { |
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1607 FreeHeap(to_dealloc_jmeths); |
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1608 } |
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1609 // free up the new ID since it wasn't needed |
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1610 if (to_dealloc_id != NULL) { |
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1611 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
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1612 } |
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1613 } |
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1614 return id; |
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1615 } |
0 | 1616 |
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1617 |
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1618 // Common code to fetch the jmethodID from the cache or update the |
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1619 // cache with the new jmethodID. This function should never do anything |
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1620 // that causes the caller to go to a safepoint or we can deadlock with |
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1621 // the VMThread or have cache consistency issues. |
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1622 // |
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1623 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
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1624 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
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1625 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
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1626 jmethodID** to_dealloc_jmeths_p) { |
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1627 assert(new_id != NULL, "sanity check"); |
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1628 assert(to_dealloc_id_p != NULL, "sanity check"); |
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1629 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
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1630 assert(Threads::number_of_threads() == 0 || |
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1631 SafepointSynchronize::is_at_safepoint() || |
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1632 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
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1633 |
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1634 // reacquire the cache - we are locked, single threaded or at a safepoint |
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1635 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
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1636 jmethodID id = NULL; |
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1637 size_t length = 0; |
0 | 1638 |
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1639 if (jmeths == NULL || // no cache yet |
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1640 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
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1641 if (jmeths != NULL) { |
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1642 // copy any existing entries from the old cache |
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1643 for (size_t index = 0; index < length; index++) { |
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1644 new_jmeths[index+1] = jmeths[index+1]; |
0 | 1645 } |
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1646 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
0 | 1647 } |
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1648 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
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1649 } else { |
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1650 // fetch jmethodID (if any) from the existing cache |
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1651 id = jmeths[idnum+1]; |
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1652 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
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1653 } |
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1654 if (id == NULL) { |
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1655 // No matching jmethodID in the existing cache or we have a new |
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1656 // cache or we just grew the cache. This cache write is done here |
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1657 // by the first thread to win the foot race because a jmethodID |
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1658 // needs to be unique once it is generally available. |
49
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1659 id = new_id; |
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1660 |
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1661 // The jmethodID cache can be read while unlocked so we have to |
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1662 // make sure the new jmethodID is complete before installing it |
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1663 // in the cache. |
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1664 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
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1665 } else { |
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1666 *to_dealloc_id_p = new_id; // save new id for later delete |
0 | 1667 } |
1668 return id; | |
1669 } | |
1670 | |
1671 | |
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1672 // Common code to get the jmethodID cache length and the jmethodID |
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1673 // value at index idnum if there is one. |
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1674 // |
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1675 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
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1676 size_t idnum, size_t *length_p, jmethodID* id_p) { |
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1677 assert(cache != NULL, "sanity check"); |
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1678 assert(length_p != NULL, "sanity check"); |
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1679 assert(id_p != NULL, "sanity check"); |
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1680 |
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1681 // cache size is stored in element[0], other elements offset by one |
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1682 *length_p = (size_t)cache[0]; |
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1683 if (*length_p <= idnum) { // cache is too short |
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1684 *id_p = NULL; |
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1685 } else { |
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1686 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1687 } |
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1688 } |
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1689 |
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1690 |
0 | 1691 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
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1692 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
0 | 1693 size_t idnum = (size_t)method->method_idnum(); |
1694 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
1695 size_t length; // length assigned as debugging crumb | |
1696 jmethodID id = NULL; | |
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1697 if (jmeths != NULL && // If there is a cache |
0 | 1698 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
1699 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
1700 } | |
1701 return id; | |
1702 } | |
1703 | |
1704 | |
1705 // Cache an itable index | |
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1706 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
0 | 1707 int* indices = methods_cached_itable_indices_acquire(); |
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1708 int* to_dealloc_indices = NULL; |
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1709 |
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1710 // We use a double-check locking idiom here because this cache is |
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1711 // performance sensitive. In the normal system, this cache only |
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1712 // transitions from NULL to non-NULL which is safe because we use |
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1713 // release_set_methods_cached_itable_indices() to advertise the |
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1714 // new cache. A partially constructed cache should never be seen |
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1715 // by a racing thread. Cache reads and writes proceed without a |
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1716 // lock, but creation of the cache itself requires no leaks so a |
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1717 // lock is generally acquired in that case. |
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1718 // |
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1719 // If the RedefineClasses() API has been used, then this cache can |
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1720 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1721 // Cache creation requires no leaks and we require safety between all |
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1722 // cache accesses and freeing of the old cache so a lock is generally |
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1723 // acquired when the RedefineClasses() API has been used. |
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1724 |
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1725 if (indices == NULL || idnum_can_increment()) { |
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1726 // we need a cache or the cache can grow |
0 | 1727 MutexLocker ml(JNICachedItableIndex_lock); |
977
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1728 // reacquire the cache to see if another thread already did the work |
0 | 1729 indices = methods_cached_itable_indices_acquire(); |
1730 size_t length = 0; | |
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1731 // cache size is stored in element[0], other elements offset by one |
0 | 1732 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
1733 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
6197 | 1734 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
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1735 new_indices[0] = (int)size; |
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1736 // copy any existing entries |
0 | 1737 size_t i; |
1738 for (i = 0; i < length; i++) { | |
1739 new_indices[i+1] = indices[i+1]; | |
1740 } | |
1741 // Set all the rest to -1 | |
1742 for (i = length; i < size; i++) { | |
1743 new_indices[i+1] = -1; | |
1744 } | |
1745 if (indices != NULL) { | |
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1746 // We have an old cache to delete so save it for after we |
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1747 // drop the lock. |
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1748 to_dealloc_indices = indices; |
0 | 1749 } |
1750 release_set_methods_cached_itable_indices(indices = new_indices); | |
1751 } | |
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1752 |
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1753 if (idnum_can_increment()) { |
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1754 // this cache can grow so we have to write to it safely |
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1755 indices[idnum+1] = index; |
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1756 } |
0 | 1757 } else { |
1758 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1759 } | |
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1760 |
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1761 if (!idnum_can_increment()) { |
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1762 // The cache cannot grow and this JNI itable index value does not |
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1763 // have to be unique like a jmethodID. If there is a race to set it, |
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1764 // it doesn't matter. |
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1765 indices[idnum+1] = index; |
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1766 } |
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1767 |
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1768 if (to_dealloc_indices != NULL) { |
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1769 // we allocated a new cache so free the old one |
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1770 FreeHeap(to_dealloc_indices); |
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1771 } |
0 | 1772 } |
1773 | |
1774 | |
1775 // Retrieve a cached itable index | |
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1776 int InstanceKlass::cached_itable_index(size_t idnum) { |
0 | 1777 int* indices = methods_cached_itable_indices_acquire(); |
1778 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
1779 // indices exist and are long enough, retrieve possible cached | |
1780 return indices[idnum+1]; | |
1781 } | |
1782 return -1; | |
1783 } | |
1784 | |
1785 | |
1786 // | |
1787 // Walk the list of dependent nmethods searching for nmethods which | |
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1788 // are dependent on the changes that were passed in and mark them for |
0 | 1789 // deoptimization. Returns the number of nmethods found. |
1790 // | |
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1791 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
0 | 1792 assert_locked_or_safepoint(CodeCache_lock); |
1793 int found = 0; | |
1794 nmethodBucket* b = _dependencies; | |
1795 while (b != NULL) { | |
1796 nmethod* nm = b->get_nmethod(); | |
1797 // since dependencies aren't removed until an nmethod becomes a zombie, | |
1798 // the dependency list may contain nmethods which aren't alive. | |
1799 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
1800 if (TraceDependencies) { | |
1801 ResourceMark rm; | |
1802 tty->print_cr("Marked for deoptimization"); | |
1803 tty->print_cr(" context = %s", this->external_name()); | |
1804 changes.print(); | |
1805 nm->print(); | |
1806 nm->print_dependencies(); | |
1807 } | |
1808 nm->mark_for_deoptimization(); | |
1809 found++; | |
1810 } | |
1811 b = b->next(); | |
1812 } | |
1813 return found; | |
1814 } | |
1815 | |
1816 | |
1817 // | |
1818 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
1819 // It's possible that an nmethod has multiple dependencies on this klass | |
1820 // so a count is kept for each bucket to guarantee that creation and | |
1821 // deletion of dependencies is consistent. | |
1822 // | |
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1823 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
0 | 1824 assert_locked_or_safepoint(CodeCache_lock); |
1825 nmethodBucket* b = _dependencies; | |
1826 nmethodBucket* last = NULL; | |
1827 while (b != NULL) { | |
1828 if (nm == b->get_nmethod()) { | |
1829 b->increment(); | |
1830 return; | |
1831 } | |
1832 b = b->next(); | |
1833 } | |
1834 _dependencies = new nmethodBucket(nm, _dependencies); | |
1835 } | |
1836 | |
1837 | |
1838 // | |
1839 // Decrement count of the nmethod in the dependency list and remove | |
1840 // the bucket competely when the count goes to 0. This method must | |
1841 // find a corresponding bucket otherwise there's a bug in the | |
1842 // recording of dependecies. | |
1843 // | |
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1844 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
0 | 1845 assert_locked_or_safepoint(CodeCache_lock); |
1846 nmethodBucket* b = _dependencies; | |
1847 nmethodBucket* last = NULL; | |
1848 while (b != NULL) { | |
1849 if (nm == b->get_nmethod()) { | |
1850 if (b->decrement() == 0) { | |
1851 if (last == NULL) { | |
1852 _dependencies = b->next(); | |
1853 } else { | |
1854 last->set_next(b->next()); | |
1855 } | |
1856 delete b; | |
1857 } | |
1858 return; | |
1859 } | |
1860 last = b; | |
1861 b = b->next(); | |
1862 } | |
1863 #ifdef ASSERT | |
1864 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
1865 nm->print(); | |
1866 #endif // ASSERT | |
1867 ShouldNotReachHere(); | |
1868 } | |
1869 | |
1870 | |
1871 #ifndef PRODUCT | |
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1872 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
0 | 1873 nmethodBucket* b = _dependencies; |
1874 int idx = 0; | |
1875 while (b != NULL) { | |
1876 nmethod* nm = b->get_nmethod(); | |
1877 tty->print("[%d] count=%d { ", idx++, b->count()); | |
1878 if (!verbose) { | |
1879 nm->print_on(tty, "nmethod"); | |
1880 tty->print_cr(" } "); | |
1881 } else { | |
1882 nm->print(); | |
1883 nm->print_dependencies(); | |
1884 tty->print_cr("--- } "); | |
1885 } | |
1886 b = b->next(); | |
1887 } | |
1888 } | |
1889 | |
1890 | |
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1891 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
0 | 1892 nmethodBucket* b = _dependencies; |
1893 while (b != NULL) { | |
1894 if (nm == b->get_nmethod()) { | |
1895 return true; | |
1896 } | |
1897 b = b->next(); | |
1898 } | |
1899 return false; | |
1900 } | |
1901 #endif //PRODUCT | |
1902 | |
1903 | |
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1904 // Garbage collection |
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1905 |
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1906 void InstanceKlass::oops_do(OopClosure* cl) { |
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1907 Klass::oops_do(cl); |
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1908 |
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1909 cl->do_oop(adr_protection_domain()); |
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1910 cl->do_oop(adr_signers()); |
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1911 cl->do_oop(adr_init_lock()); |
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1912 |
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1913 // Don't walk the arrays since they are walked from the ClassLoaderData objects. |
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1914 } |
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1915 |
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1916 #ifdef ASSERT |
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1917 template <class T> void assert_is_in(T *p) { |
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1918 T heap_oop = oopDesc::load_heap_oop(p); |
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1919 if (!oopDesc::is_null(heap_oop)) { |
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1920 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1921 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1922 } |
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1923 } |
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1924 template <class T> void assert_is_in_closed_subset(T *p) { |
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1925 T heap_oop = oopDesc::load_heap_oop(p); |
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1926 if (!oopDesc::is_null(heap_oop)) { |
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1927 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
6725
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1928 assert(Universe::heap()->is_in_closed_subset(o), |
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1929 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
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1930 } |
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1931 } |
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1932 template <class T> void assert_is_in_reserved(T *p) { |
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1933 T heap_oop = oopDesc::load_heap_oop(p); |
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1934 if (!oopDesc::is_null(heap_oop)) { |
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1935 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1936 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1937 } |
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1938 } |
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1939 template <class T> void assert_nothing(T *p) {} |
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1940 |
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1941 #else |
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1942 template <class T> void assert_is_in(T *p) {} |
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1943 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1944 template <class T> void assert_is_in_reserved(T *p) {} |
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1945 template <class T> void assert_nothing(T *p) {} |
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1946 #endif // ASSERT |
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1947 |
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1948 // |
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1949 // Macros that iterate over areas of oops which are specialized on type of |
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1950 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1951 // |
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1952 // Parameters are: |
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1953 // T - type of oop to point to (either oop or narrowOop) |
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1954 // start_p - starting pointer for region to iterate over |
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1955 // count - number of oops or narrowOops to iterate over |
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1956 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1957 // makes it more efficient to put in a macro rather than making |
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1958 // it a template function) |
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1959 // assert_fn - assert function which is template function because performance |
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1960 // doesn't matter when enabled. |
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1961 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1962 T, start_p, count, do_oop, \ |
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1963 assert_fn) \ |
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1964 { \ |
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1965 T* p = (T*)(start_p); \ |
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1966 T* const end = p + (count); \ |
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1967 while (p < end) { \ |
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1968 (assert_fn)(p); \ |
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1969 do_oop; \ |
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1970 ++p; \ |
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1971 } \ |
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1972 } |
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1973 |
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1974 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1975 T, start_p, count, do_oop, \ |
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1976 assert_fn) \ |
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1977 { \ |
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1978 T* const start = (T*)(start_p); \ |
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1979 T* p = start + (count); \ |
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1980 while (start < p) { \ |
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1981 --p; \ |
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1982 (assert_fn)(p); \ |
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1983 do_oop; \ |
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1984 } \ |
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1985 } |
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1986 |
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1987 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1988 T, start_p, count, low, high, \ |
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1989 do_oop, assert_fn) \ |
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1990 { \ |
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1991 T* const l = (T*)(low); \ |
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1992 T* const h = (T*)(high); \ |
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1993 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1994 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1995 "bounded region must be properly aligned"); \ |
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1996 T* p = (T*)(start_p); \ |
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1997 T* end = p + (count); \ |
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1998 if (p < l) p = l; \ |
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1999 if (end > h) end = h; \ |
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2000 while (p < end) { \ |
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2001 (assert_fn)(p); \ |
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2002 do_oop; \ |
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2003 ++p; \ |
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2004 } \ |
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2005 } |
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2006 |
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2007 |
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2008 // The following macros call specialized macros, passing either oop or |
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2009 // narrowOop as the specialization type. These test the UseCompressedOops |
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2010 // flag. |
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2011 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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2012 { \ |
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2013 /* Compute oopmap block range. The common case \ |
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2014 is nonstatic_oop_map_size == 1. */ \ |
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2015 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 2016 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
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2017 if (UseCompressedOops) { \ |
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2018 while (map < end_map) { \ |
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2019 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
938 | 2020 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2021 do_oop, assert_fn) \ |
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2022 ++map; \ |
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2023 } \ |
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2024 } else { \ |
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2025 while (map < end_map) { \ |
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2026 InstanceKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
938 | 2027 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
113
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2028 do_oop, assert_fn) \ |
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2029 ++map; \ |
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2030 } \ |
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2031 } \ |
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2032 } |
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2033 |
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2034 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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2035 { \ |
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2036 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
938 | 2037 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
113
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2038 if (UseCompressedOops) { \ |
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2039 while (start_map < map) { \ |
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2040 --map; \ |
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2041 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
938 | 2042 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
113
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2043 do_oop, assert_fn) \ |
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2044 } \ |
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2045 } else { \ |
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2046 while (start_map < map) { \ |
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2047 --map; \ |
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2048 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
938 | 2049 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
113
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2050 do_oop, assert_fn) \ |
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2051 } \ |
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2052 } \ |
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2053 } |
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2054 |
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2055 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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2056 assert_fn) \ |
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2057 { \ |
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2058 /* Compute oopmap block range. The common case is \ |
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2059 nonstatic_oop_map_size == 1, so we accept the \ |
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2060 usually non-existent extra overhead of examining \ |
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2061 all the maps. */ \ |
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2062 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
938 | 2063 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
113
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2064 if (UseCompressedOops) { \ |
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2065 while (map < end_map) { \ |
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2066 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
938 | 2067 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
113
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2068 low, high, \ |
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2069 do_oop, assert_fn) \ |
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2070 ++map; \ |
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2071 } \ |
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2072 } else { \ |
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2073 while (map < end_map) { \ |
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2074 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
938 | 2075 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
113
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2076 low, high, \ |
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2077 do_oop, assert_fn) \ |
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2078 ++map; \ |
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2079 } \ |
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2080 } \ |
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2081 } |
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2082 |
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2083 void InstanceKlass::oop_follow_contents(oop obj) { |
113
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2084 assert(obj != NULL, "can't follow the content of NULL object"); |
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2085 MarkSweep::follow_klass(obj->klass()); |
113
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2086 InstanceKlass_OOP_MAP_ITERATE( \ |
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2087 obj, \ |
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2088 MarkSweep::mark_and_push(p), \ |
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2089 assert_is_in_closed_subset) |
0 | 2090 } |
2091 | |
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2092 #if INCLUDE_ALL_GCS |
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2093 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
0 | 2094 oop obj) { |
113
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2095 assert(obj != NULL, "can't follow the content of NULL object"); |
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2096 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2097 // Only mark the header and let the scan of the meta-data mark |
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2098 // everything else. |
113
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2099 InstanceKlass_OOP_MAP_ITERATE( \ |
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2100 obj, \ |
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2101 PSParallelCompact::mark_and_push(cm, p), \ |
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2102 assert_is_in) |
0 | 2103 } |
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2104 #endif // INCLUDE_ALL_GCS |
0 | 2105 |
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2106 // closure's do_metadata() method dictates whether the given closure should be |
0 | 2107 // applied to the klass ptr in the object header. |
2108 | |
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2109 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2110 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2111 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2112 "Inconsistency in do_metadata"); \ |
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2113 if (closure->do_metadata##nv_suffix()) |
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2114 |
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2115 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
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2116 \ |
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2117 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
113
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2118 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2119 /* header */ \ |
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2120 if_do_metadata_checked(closure, nv_suffix) { \ |
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2121 closure->do_klass##nv_suffix(obj->klass()); \ |
113
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2122 } \ |
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2123 InstanceKlass_OOP_MAP_ITERATE( \ |
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2124 obj, \ |
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2125 SpecializationStats:: \ |
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2126 record_do_oop_call##nv_suffix(SpecializationStats::ik); \ |
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2127 (closure)->do_oop##nv_suffix(p), \ |
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2128 assert_is_in_closed_subset) \ |
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2129 return size_helper(); \ |
0 | 2130 } |
2131 | |
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2132 #if INCLUDE_ALL_GCS |
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2133 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2134 \ |
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2135 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
342
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2136 OopClosureType* closure) { \ |
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2137 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2138 /* header */ \ |
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2139 if_do_metadata_checked(closure, nv_suffix) { \ |
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2140 closure->do_klass##nv_suffix(obj->klass()); \ |
342
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2141 } \ |
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2142 /* instance variables */ \ |
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2143 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2144 obj, \ |
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2145 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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2146 (closure)->do_oop##nv_suffix(p), \ |
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2147 assert_is_in_closed_subset) \ |
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2148 return size_helper(); \ |
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2149 } |
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2150 #endif // INCLUDE_ALL_GCS |
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2151 |
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2152 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2153 \ |
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2154 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
113
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2155 OopClosureType* closure, \ |
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2156 MemRegion mr) { \ |
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2157 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2158 if_do_metadata_checked(closure, nv_suffix) { \ |
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2159 if (mr.contains(obj)) { \ |
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2160 closure->do_klass##nv_suffix(obj->klass()); \ |
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2161 } \ |
113
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2162 } \ |
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2163 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2164 obj, mr.start(), mr.end(), \ |
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2165 (closure)->do_oop##nv_suffix(p), \ |
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2166 assert_is_in_closed_subset) \ |
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2167 return size_helper(); \ |
0 | 2168 } |
2169 | |
2170 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
342
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2171 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
0 | 2172 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
342
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2173 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2174 #if INCLUDE_ALL_GCS |
342
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2175 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2176 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2177 #endif // INCLUDE_ALL_GCS |
0 | 2178 |
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2179 int InstanceKlass::oop_adjust_pointers(oop obj) { |
0 | 2180 int size = size_helper(); |
113
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2181 InstanceKlass_OOP_MAP_ITERATE( \ |
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2182 obj, \ |
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2183 MarkSweep::adjust_pointer(p), \ |
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2184 assert_is_in) |
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2185 MarkSweep::adjust_klass(obj->klass()); |
0 | 2186 return size; |
2187 } | |
2188 | |
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2189 #if INCLUDE_ALL_GCS |
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2190 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
113
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2191 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2192 obj, \ |
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2193 if (PSScavenge::should_scavenge(p)) { \ |
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2194 pm->claim_or_forward_depth(p); \ |
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2195 }, \ |
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2196 assert_nothing ) |
0 | 2197 } |
2198 | |
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2199 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
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2200 int size = size_helper(); |
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2201 InstanceKlass_OOP_MAP_ITERATE( \ |
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2202 obj, \ |
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2203 PSParallelCompact::adjust_pointer(p), \ |
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2204 assert_is_in) |
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2205 obj->update_header(cm); |
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2206 return size; |
0 | 2207 } |
2208 | |
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2209 #endif // INCLUDE_ALL_GCS |
0 | 2210 |
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2211 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
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2212 assert(is_loader_alive(is_alive), "this klass should be live"); |
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2213 if (is_interface()) { |
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2214 if (ClassUnloading) { |
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2215 Klass* impl = implementor(); |
5998
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2216 if (impl != NULL) { |
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2217 if (!impl->is_loader_alive(is_alive)) { |
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2218 // remove this guy |
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2219 Klass** klass = adr_implementor(); |
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2220 assert(klass != NULL, "null klass"); |
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2221 if (klass != NULL) { |
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2222 *klass = NULL; |
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2223 } |
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2224 } |
0 | 2225 } |
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2226 } |
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2227 } |
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2228 } |
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2229 |
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2230 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
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2231 for (int m = 0; m < methods()->length(); m++) { |
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2232 MethodData* mdo = methods()->at(m)->method_data(); |
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2233 if (mdo != NULL) { |
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2234 for (ProfileData* data = mdo->first_data(); |
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2235 mdo->is_valid(data); |
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2236 data = mdo->next_data(data)) { |
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2237 data->clean_weak_klass_links(is_alive); |
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2238 } |
0 | 2239 } |
2240 } | |
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2241 } |
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2242 |
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2243 |
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2244 static void remove_unshareable_in_class(Klass* k) { |
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2245 // remove klass's unshareable info |
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2246 k->remove_unshareable_info(); |
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2247 } |
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2248 |
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2249 void InstanceKlass::remove_unshareable_info() { |
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2250 Klass::remove_unshareable_info(); |
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2251 // Unlink the class |
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2252 if (is_linked()) { |
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2253 unlink_class(); |
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2254 } |
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2255 init_implementor(); |
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2256 |
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2257 constants()->remove_unshareable_info(); |
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2258 |
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2259 for (int i = 0; i < methods()->length(); i++) { |
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2260 Method* m = methods()->at(i); |
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2261 m->remove_unshareable_info(); |
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2262 } |
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2263 |
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2264 // Need to reinstate when reading back the class. |
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2265 set_init_lock(NULL); |
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2266 |
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2267 // do array classes also. |
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2268 array_klasses_do(remove_unshareable_in_class); |
0 | 2269 } |
2270 | |
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2271 void restore_unshareable_in_class(Klass* k, TRAPS) { |
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2272 k->restore_unshareable_info(CHECK); |
0 | 2273 } |
2274 | |
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2275 void InstanceKlass::restore_unshareable_info(TRAPS) { |
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2276 Klass::restore_unshareable_info(CHECK); |
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2277 instanceKlassHandle ik(THREAD, this); |
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2278 |
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2279 Array<Method*>* methods = ik->methods(); |
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2280 int num_methods = methods->length(); |
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2281 for (int index2 = 0; index2 < num_methods; ++index2) { |
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2282 methodHandle m(THREAD, methods->at(index2)); |
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2283 m()->link_method(m, CHECK); |
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2284 // restore method's vtable by calling a virtual function |
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2285 m->restore_vtable(); |
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2286 } |
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2287 if (JvmtiExport::has_redefined_a_class()) { |
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2288 // Reinitialize vtable because RedefineClasses may have changed some |
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2289 // entries in this vtable for super classes so the CDS vtable might |
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2290 // point to old or obsolete entries. RedefineClasses doesn't fix up |
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2291 // vtables in the shared system dictionary, only the main one. |
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2292 // It also redefines the itable too so fix that too. |
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2293 ResourceMark rm(THREAD); |
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2294 ik->vtable()->initialize_vtable(false, CHECK); |
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2295 ik->itable()->initialize_itable(false, CHECK); |
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2296 } |
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2297 |
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2298 // Allocate a simple java object for a lock. |
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2299 // This needs to be a java object because during class initialization |
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2300 // it can be held across a java call. |
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2301 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); |
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2302 Handle h(THREAD, (oop)r); |
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2303 ik->set_init_lock(h()); |
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2304 |
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2305 // restore constant pool resolved references |
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2306 ik->constants()->restore_unshareable_info(CHECK); |
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2307 |
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2308 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
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2309 } |
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2310 |
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2311 static void clear_all_breakpoints(Method* m) { |
0 | 2312 m->clear_all_breakpoints(); |
2313 } | |
2314 | |
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2315 void InstanceKlass::release_C_heap_structures() { |
0 | 2316 // Deallocate oop map cache |
2317 if (_oop_map_cache != NULL) { | |
2318 delete _oop_map_cache; | |
2319 _oop_map_cache = NULL; | |
2320 } | |
2321 | |
2322 // Deallocate JNI identifiers for jfieldIDs | |
2323 JNIid::deallocate(jni_ids()); | |
2324 set_jni_ids(NULL); | |
2325 | |
2326 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
2327 if (jmeths != (jmethodID*)NULL) { | |
2328 release_set_methods_jmethod_ids(NULL); | |
2329 FreeHeap(jmeths); | |
2330 } | |
2331 | |
2332 int* indices = methods_cached_itable_indices_acquire(); | |
2333 if (indices != (int*)NULL) { | |
2334 release_set_methods_cached_itable_indices(NULL); | |
2335 FreeHeap(indices); | |
2336 } | |
2337 | |
2338 // release dependencies | |
2339 nmethodBucket* b = _dependencies; | |
2340 _dependencies = NULL; | |
2341 while (b != NULL) { | |
2342 nmethodBucket* next = b->next(); | |
2343 delete b; | |
2344 b = next; | |
2345 } | |
2346 | |
2347 // Deallocate breakpoint records | |
2348 if (breakpoints() != 0x0) { | |
2349 methods_do(clear_all_breakpoints); | |
2350 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
2351 } | |
2352 | |
2353 // deallocate information about previous versions | |
2354 if (_previous_versions != NULL) { | |
2355 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
2356 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
2357 delete pv_node; | |
2358 } | |
2359 delete _previous_versions; | |
2360 _previous_versions = NULL; | |
2361 } | |
2362 | |
2363 // deallocate the cached class file | |
2364 if (_cached_class_file_bytes != NULL) { | |
6197 | 2365 os::free(_cached_class_file_bytes, mtClass); |
0 | 2366 _cached_class_file_bytes = NULL; |
2367 _cached_class_file_len = 0; | |
2368 } | |
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2369 |
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2370 // Decrement symbol reference counts associated with the unloaded class. |
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2371 if (_name != NULL) _name->decrement_refcount(); |
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2372 // unreference array name derived from this class name (arrays of an unloaded |
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2373 // class can't be referenced anymore). |
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2374 if (_array_name != NULL) _array_name->decrement_refcount(); |
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2375 if (_source_file_name != NULL) _source_file_name->decrement_refcount(); |
6203
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2376 if (_source_debug_extension != NULL) FREE_C_HEAP_ARRAY(char, _source_debug_extension, mtClass); |
7464
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2377 |
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2378 assert(_total_instanceKlass_count >= 1, "Sanity check"); |
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2379 Atomic::dec(&_total_instanceKlass_count); |
2177
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2380 } |
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2381 |
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2382 void InstanceKlass::set_source_file_name(Symbol* n) { |
2177
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2383 _source_file_name = n; |
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2384 if (_source_file_name != NULL) _source_file_name->increment_refcount(); |
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2385 } |
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2386 |
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2387 void InstanceKlass::set_source_debug_extension(char* array, int length) { |
6203
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2388 if (array == NULL) { |
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2389 _source_debug_extension = NULL; |
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2390 } else { |
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2391 // Adding one to the attribute length in order to store a null terminator |
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2392 // character could cause an overflow because the attribute length is |
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2393 // already coded with an u4 in the classfile, but in practice, it's |
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2394 // unlikely to happen. |
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2395 assert((length+1) > length, "Overflow checking"); |
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2396 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass); |
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2397 for (int i = 0; i < length; i++) { |
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2398 sde[i] = array[i]; |
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|
2399 } |
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|
2400 sde[length] = '\0'; |
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|
2401 _source_debug_extension = sde; |
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2402 } |
0 | 2403 } |
2404 | |
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2405 address InstanceKlass::static_field_addr(int offset) { |
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
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6733
diff
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|
2406 return (address)(offset + InstanceMirrorKlass::offset_of_static_fields() + (intptr_t)java_mirror()); |
2376
c7f3d0b4570f
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diff
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|
2407 } |
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diff
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|
2408 |
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|
2409 |
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2410 const char* InstanceKlass::signature_name() const { |
0 | 2411 const char* src = (const char*) (name()->as_C_string()); |
2412 const int src_length = (int)strlen(src); | |
2413 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
2414 int src_index = 0; | |
2415 int dest_index = 0; | |
2416 dest[dest_index++] = 'L'; | |
2417 while (src_index < src_length) { | |
2418 dest[dest_index++] = src[src_index++]; | |
2419 } | |
2420 dest[dest_index++] = ';'; | |
2421 dest[dest_index] = '\0'; | |
2422 return dest; | |
2423 } | |
2424 | |
2425 // different verisons of is_same_class_package | |
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2426 bool InstanceKlass::is_same_class_package(Klass* class2) { |
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|
2427 Klass* class1 = this; |
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|
2428 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2429 Symbol* classname1 = class1->name(); |
2430 | |
2431 if (class2->oop_is_objArray()) { | |
6831
d8ce2825b193
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coleenp
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6735
diff
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|
2432 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
0 | 2433 } |
2434 oop classloader2; | |
6983 | 2435 if (class2->oop_is_instance()) { |
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2436 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
0 | 2437 } else { |
6983 | 2438 assert(class2->oop_is_typeArray(), "should be type array"); |
0 | 2439 classloader2 = NULL; |
2440 } | |
6983 | 2441 Symbol* classname2 = class2->name(); |
0 | 2442 |
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2443 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2444 classloader2, classname2); |
2445 } | |
2446 | |
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2447 bool InstanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) { |
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2448 Klass* class1 = this; |
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2449 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
6983 | 2450 Symbol* classname1 = class1->name(); |
0 | 2451 |
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2452 return InstanceKlass::is_same_class_package(classloader1, classname1, |
0 | 2453 classloader2, classname2); |
2454 } | |
2455 | |
2456 // return true if two classes are in the same package, classloader | |
2457 // and classname information is enough to determine a class's package | |
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2458 bool InstanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1, |
2177
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2459 oop class_loader2, Symbol* class_name2) { |
0 | 2460 if (class_loader1 != class_loader2) { |
2461 return false; | |
665
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|
2462 } else if (class_name1 == class_name2) { |
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2463 return true; // skip painful bytewise comparison |
0 | 2464 } else { |
2465 ResourceMark rm; | |
2466 | |
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2467 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
0 | 2468 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
2469 // Otherwise, we just compare jbyte values between the strings. | |
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2470 const jbyte *name1 = class_name1->base(); |
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|
2471 const jbyte *name2 = class_name2->base(); |
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|
2472 |
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|
2473 const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/'); |
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2474 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
0 | 2475 |
2476 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
2477 // One of the two doesn't have a package. Only return true | |
2478 // if the other one also doesn't have a package. | |
2479 return last_slash1 == last_slash2; | |
2480 } else { | |
2481 // Skip over '['s | |
2482 if (*name1 == '[') { | |
2483 do { | |
2484 name1++; | |
2485 } while (*name1 == '['); | |
2486 if (*name1 != 'L') { | |
2487 // Something is terribly wrong. Shouldn't be here. | |
2488 return false; | |
2489 } | |
2490 } | |
2491 if (*name2 == '[') { | |
2492 do { | |
2493 name2++; | |
2494 } while (*name2 == '['); | |
2495 if (*name2 != 'L') { | |
2496 // Something is terribly wrong. Shouldn't be here. | |
2497 return false; | |
2498 } | |
2499 } | |
2500 | |
2501 // Check that package part is identical | |
2502 int length1 = last_slash1 - name1; | |
2503 int length2 = last_slash2 - name2; | |
2504 | |
2505 return UTF8::equal(name1, length1, name2, length2); | |
2506 } | |
2507 } | |
2508 } | |
2509 | |
652
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|
2510 // Returns true iff super_method can be overridden by a method in targetclassname |
4aaa9f5e02a8
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2511 // See JSL 3rd edition 8.4.6.1 |
4aaa9f5e02a8
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|
2512 // Assumes name-signature match |
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2513 // "this" is InstanceKlass of super_method which must exist |
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2514 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
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changeset
|
2515 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
652
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parents:
605
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|
2516 // Private methods can not be overridden |
4aaa9f5e02a8
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605
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|
2517 if (super_method->is_private()) { |
4aaa9f5e02a8
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acorn
parents:
605
diff
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|
2518 return false; |
4aaa9f5e02a8
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acorn
parents:
605
diff
changeset
|
2519 } |
4aaa9f5e02a8
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acorn
parents:
605
diff
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|
2520 // If super method is accessible, then override |
4aaa9f5e02a8
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parents:
605
diff
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|
2521 if ((super_method->is_protected()) || |
4aaa9f5e02a8
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parents:
605
diff
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|
2522 (super_method->is_public())) { |
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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parents:
605
diff
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|
2523 return true; |
4aaa9f5e02a8
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acorn
parents:
605
diff
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|
2524 } |
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parents:
605
diff
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|
2525 // Package-private methods are not inherited outside of package |
4aaa9f5e02a8
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acorn
parents:
605
diff
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|
2526 assert(super_method->is_package_private(), "must be package private"); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
changeset
|
2527 return(is_same_class_package(targetclassloader(), targetclassname)); |
652
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diff
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|
2528 } |
0 | 2529 |
665
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6814659: separable cleanups and subroutines for 6655638
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|
2530 /* defined for now in jvm.cpp, for historical reasons *-- |
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|
2531 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle self, |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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1972
diff
changeset
|
2532 Symbol*& simple_name_result, TRAPS) { |
665
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|
2533 ... |
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|
2534 } |
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diff
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|
2535 */ |
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|
2536 |
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jrose
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diff
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|
2537 // tell if two classes have the same enclosing class (at package level) |
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2538 bool InstanceKlass::is_same_package_member_impl(instanceKlassHandle class1, |
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2539 Klass* class2_oop, TRAPS) { |
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2540 if (class2_oop == class1()) return true; |
6983 | 2541 if (!class2_oop->oop_is_instance()) return false; |
665
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|
2542 instanceKlassHandle class2(THREAD, class2_oop); |
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|
2543 |
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|
2544 // must be in same package before we try anything else |
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|
2545 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
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|
2546 return false; |
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|
2547 |
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|
2548 // As long as there is an outer1.getEnclosingClass, |
c89f86385056
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diff
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|
2549 // shift the search outward. |
c89f86385056
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diff
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|
2550 instanceKlassHandle outer1 = class1; |
c89f86385056
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|
2551 for (;;) { |
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|
2552 // As we walk along, look for equalities between outer1 and class2. |
c89f86385056
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|
2553 // Eventually, the walks will terminate as outer1 stops |
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jrose
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diff
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|
2554 // at the top-level class around the original class. |
1126
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xlu
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diff
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|
2555 bool ignore_inner_is_member; |
6725
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2556 Klass* next = outer1->compute_enclosing_class(&ignore_inner_is_member, |
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diff
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|
2557 CHECK_false); |
665
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|
2558 if (next == NULL) break; |
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|
2559 if (next == class2()) return true; |
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|
2560 outer1 = instanceKlassHandle(THREAD, next); |
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jrose
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|
2561 } |
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|
2562 |
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diff
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|
2563 // Now do the same for class2. |
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|
2564 instanceKlassHandle outer2 = class2; |
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|
2565 for (;;) { |
1126
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|
2566 bool ignore_inner_is_member; |
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2567 Klass* next = outer2->compute_enclosing_class(&ignore_inner_is_member, |
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diff
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|
2568 CHECK_false); |
665
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|
2569 if (next == NULL) break; |
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diff
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|
2570 // Might as well check the new outer against all available values. |
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jrose
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diff
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|
2571 if (next == class1()) return true; |
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605
diff
changeset
|
2572 if (next == outer1()) return true; |
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diff
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|
2573 outer2 = instanceKlassHandle(THREAD, next); |
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jrose
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|
2574 } |
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diff
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|
2575 |
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diff
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|
2576 // 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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|
2577 // two classes, we know they are in separate package members. |
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jrose
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605
diff
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|
2578 return false; |
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605
diff
changeset
|
2579 } |
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jrose
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diff
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|
2580 |
0 | 2581 |
6725
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|
2582 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
0 | 2583 jint access = access_flags().as_int(); |
2584 | |
2585 // But check if it happens to be member class. | |
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|
2586 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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|
2587 InnerClassesIterator iter(ik); |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
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|
2588 for (; !iter.done(); iter.next()) { |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2589 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
changeset
|
2590 // Inner class attribute can be zero, skip it. |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2591 // Strange but true: JVM spec. allows null inner class refs. |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2592 if (ioff == 0) continue; |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2593 |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2594 // 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
|
2595 // 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
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|
2596 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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|
2597 if ((ik->name() == inner_name)) { |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2598 // 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
|
2599 access = iter.inner_access_flags(); |
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
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4739
diff
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|
2600 break; |
0 | 2601 } |
2602 } | |
2603 // Remember to strip ACC_SUPER bit | |
2604 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
2605 } | |
2606 | |
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|
2607 jint InstanceKlass::jvmti_class_status() const { |
0 | 2608 jint result = 0; |
2609 | |
2610 if (is_linked()) { | |
2611 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
2612 } | |
2613 | |
2614 if (is_initialized()) { | |
2615 assert(is_linked(), "Class status is not consistent"); | |
2616 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
2617 } | |
2618 if (is_in_error_state()) { | |
2619 result |= JVMTI_CLASS_STATUS_ERROR; | |
2620 } | |
2621 return result; | |
2622 } | |
2623 | |
6725
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|
2624 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
0 | 2625 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
2626 int method_table_offset_in_words = ioe->offset()/wordSize; | |
2627 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
2628 / itableOffsetEntry::size(); | |
2629 | |
2630 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
605 | 2631 // If the interface isn't implemented by the receiver class, |
0 | 2632 // the VM should throw IncompatibleClassChangeError. |
2633 if (cnt >= nof_interfaces) { | |
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|
2634 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
0 | 2635 } |
2636 | |
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|
2637 Klass* ik = ioe->interface_klass(); |
0 | 2638 if (ik == holder) break; |
2639 } | |
2640 | |
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|
2641 itableMethodEntry* ime = ioe->first_method_entry(this); |
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|
2642 Method* m = ime[index].method(); |
0 | 2643 if (m == NULL) { |
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|
2644 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
0 | 2645 } |
2646 return m; | |
2647 } | |
2648 | |
2649 // On-stack replacement stuff | |
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2650 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
0 | 2651 // only one compilation can be active |
2652 NEEDS_CLEANUP | |
2653 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
2654 OsrList_lock->lock_without_safepoint_check(); | |
2655 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
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|
2656 n->set_osr_link(osr_nmethods_head()); |
0 | 2657 set_osr_nmethods_head(n); |
1783 | 2658 // Raise the highest osr level if necessary |
2659 if (TieredCompilation) { | |
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|
2660 Method* m = n->method(); |
1783 | 2661 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
2662 } | |
0 | 2663 // Remember to unlock again |
2664 OsrList_lock->unlock(); | |
1783 | 2665 |
2666 // Get rid of the osr methods for the same bci that have lower levels. | |
2667 if (TieredCompilation) { | |
2668 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
2669 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
2670 if (inv != NULL && inv->is_in_use()) { | |
2671 inv->make_not_entrant(); | |
2672 } | |
2673 } | |
2674 } | |
0 | 2675 } |
2676 | |
2677 | |
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2678 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
0 | 2679 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2680 OsrList_lock->lock_without_safepoint_check(); | |
2681 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
2682 nmethod* last = NULL; | |
2683 nmethod* cur = osr_nmethods_head(); | |
1783 | 2684 int max_level = CompLevel_none; // Find the max comp level excluding n |
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|
2685 Method* m = n->method(); |
0 | 2686 // Search for match |
2687 while(cur != NULL && cur != n) { | |
1783 | 2688 if (TieredCompilation) { |
2689 // Find max level before n | |
2690 max_level = MAX2(max_level, cur->comp_level()); | |
2691 } | |
0 | 2692 last = cur; |
989
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|
2693 cur = cur->osr_link(); |
0 | 2694 } |
1783 | 2695 nmethod* next = NULL; |
0 | 2696 if (cur == n) { |
1783 | 2697 next = cur->osr_link(); |
0 | 2698 if (last == NULL) { |
2699 // Remove first element | |
1783 | 2700 set_osr_nmethods_head(next); |
0 | 2701 } else { |
1783 | 2702 last->set_osr_link(next); |
0 | 2703 } |
2704 } | |
989
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|
2705 n->set_osr_link(NULL); |
1783 | 2706 if (TieredCompilation) { |
2707 cur = next; | |
2708 while (cur != NULL) { | |
2709 // Find max level after n | |
2710 max_level = MAX2(max_level, cur->comp_level()); | |
2711 cur = cur->osr_link(); | |
2712 } | |
2713 m->set_highest_osr_comp_level(max_level); | |
2714 } | |
0 | 2715 // Remember to unlock again |
2716 OsrList_lock->unlock(); | |
2717 } | |
2718 | |
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2719 nmethod* InstanceKlass::lookup_osr_nmethod(Method* const m, int bci, int comp_level, bool match_level) const { |
0 | 2720 // This is a short non-blocking critical region, so the no safepoint check is ok. |
2721 OsrList_lock->lock_without_safepoint_check(); | |
2722 nmethod* osr = osr_nmethods_head(); | |
1783 | 2723 nmethod* best = NULL; |
0 | 2724 while (osr != NULL) { |
2725 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
1783 | 2726 // There can be a time when a c1 osr method exists but we are waiting |
2727 // for a c2 version. When c2 completes its osr nmethod we will trash | |
2728 // the c1 version and only be able to find the c2 version. However | |
2729 // while we overflow in the c1 code at back branches we don't want to | |
2730 // try and switch to the same code as we are already running | |
2731 | |
0 | 2732 if (osr->method() == m && |
2733 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
1783 | 2734 if (match_level) { |
2735 if (osr->comp_level() == comp_level) { | |
2736 // Found a match - return it. | |
2737 OsrList_lock->unlock(); | |
2738 return osr; | |
2739 } | |
2740 } else { | |
2741 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
2742 if (osr->comp_level() == CompLevel_highest_tier) { | |
2743 // Found the best possible - return it. | |
2744 OsrList_lock->unlock(); | |
2745 return osr; | |
2746 } | |
2747 best = osr; | |
2748 } | |
2749 } | |
0 | 2750 } |
989
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2751 osr = osr->osr_link(); |
0 | 2752 } |
2753 OsrList_lock->unlock(); | |
1783 | 2754 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
2755 return best; | |
2756 } | |
0 | 2757 return NULL; |
2758 } | |
2759 | |
2760 // ----------------------------------------------------------------------------------------------------- | |
6725
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2761 // Printing |
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2762 |
0 | 2763 #ifndef PRODUCT |
2764 | |
665
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2765 #define BULLET " - " |
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2766 |
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2767 static const char* state_names[] = { |
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2768 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
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2769 }; |
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2770 |
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2771 void InstanceKlass::print_on(outputStream* st) const { |
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2772 assert(is_klass(), "must be klass"); |
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2773 Klass::print_on(st); |
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2774 |
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2775 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
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2776 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2777 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
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2778 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
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2779 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2780 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
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2781 st->print(BULLET"sub: "); |
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2782 Klass* sub = subklass(); |
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2783 int n; |
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2784 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
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2785 if (n < MaxSubklassPrintSize) { |
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2786 sub->print_value_on(st); |
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2787 st->print(" "); |
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2788 } |
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2789 } |
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2790 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
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2791 st->cr(); |
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2792 |
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2793 if (is_interface()) { |
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2794 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
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2795 if (nof_implementors() == 1) { |
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2796 st->print_cr(BULLET"implementor: "); |
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2797 st->print(" "); |
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2798 implementor()->print_value_on(st); |
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2799 st->cr(); |
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2800 } |
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2801 } |
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2802 |
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2803 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
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2804 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
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2805 if (Verbose) { |
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2806 Array<Method*>* method_array = methods(); |
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2807 for(int i = 0; i < method_array->length(); i++) { |
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2808 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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2809 } |
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2810 } |
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2811 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
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2812 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
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2813 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
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2814 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
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2815 if (class_loader_data() != NULL) { |
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2816 st->print(BULLET"class loader data: "); |
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2817 class_loader_data()->print_value_on(st); |
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2818 st->cr(); |
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2819 } |
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2820 st->print(BULLET"protection domain: "); ((InstanceKlass*)this)->protection_domain()->print_value_on(st); st->cr(); |
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2821 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
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2822 st->print(BULLET"signers: "); signers()->print_value_on(st); st->cr(); |
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8003553: NPG: metaspace objects should be zeroed in constructors
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2823 st->print(BULLET"init_lock: "); ((oop)_init_lock)->print_value_on(st); st->cr(); |
6725
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2824 if (source_file_name() != NULL) { |
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2825 st->print(BULLET"source file: "); |
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2826 source_file_name()->print_value_on(st); |
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2827 st->cr(); |
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2828 } |
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2829 if (source_debug_extension() != NULL) { |
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2830 st->print(BULLET"source debug extension: "); |
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2831 st->print("%s", source_debug_extension()); |
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2832 st->cr(); |
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2833 } |
8031 | 2834 st->print(BULLET"class annotations: "); class_annotations()->print_value_on(st); st->cr(); |
2835 st->print(BULLET"class type annotations: "); class_type_annotations()->print_value_on(st); st->cr(); | |
2836 st->print(BULLET"field annotations: "); fields_annotations()->print_value_on(st); st->cr(); | |
2837 st->print(BULLET"field type annotations: "); fields_type_annotations()->print_value_on(st); st->cr(); | |
6725
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2838 { |
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2839 ResourceMark rm; |
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2840 // PreviousVersionInfo objects returned via PreviousVersionWalker |
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2841 // contain a GrowableArray of handles. We have to clean up the |
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2842 // GrowableArray _after_ the PreviousVersionWalker destructor |
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2843 // has destroyed the handles. |
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2844 { |
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2845 bool have_pv = false; |
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2846 PreviousVersionWalker pvw((InstanceKlass*)this); |
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2847 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
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2848 pv_info != NULL; pv_info = pvw.next_previous_version()) { |
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2849 if (!have_pv) |
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2850 st->print(BULLET"previous version: "); |
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2851 have_pv = true; |
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2852 pv_info->prev_constant_pool_handle()()->print_value_on(st); |
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2853 } |
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2854 if (have_pv) st->cr(); |
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2855 } // pvw is cleaned up |
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2856 } // rm is cleaned up |
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2857 |
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2858 if (generic_signature() != NULL) { |
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2859 st->print(BULLET"generic signature: "); |
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2860 generic_signature()->print_value_on(st); |
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2861 st->cr(); |
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|
2862 } |
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2863 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr(); |
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2864 st->print(BULLET"java mirror: "); java_mirror()->print_value_on(st); st->cr(); |
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2865 st->print(BULLET"vtable length %d (start addr: " INTPTR_FORMAT ")", vtable_length(), start_of_vtable()); st->cr(); |
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2866 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", itable_length(), start_of_itable()); st->cr(); |
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2867 st->print_cr(BULLET"---- static fields (%d words):", static_field_size()); |
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2868 FieldPrinter print_static_field(st); |
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2869 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
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2870 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size()); |
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2871 FieldPrinter print_nonstatic_field(st); |
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2872 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
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2873 |
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2874 st->print(BULLET"non-static oop maps: "); |
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2875 OopMapBlock* map = start_of_nonstatic_oop_maps(); |
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2876 OopMapBlock* end_map = map + nonstatic_oop_map_count(); |
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|
2877 while (map < end_map) { |
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2878 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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|
2879 map++; |
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6964458: Reimplement class meta-data storage to use native memory
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|
2880 } |
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6964458: Reimplement class meta-data storage to use native memory
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|
2881 st->cr(); |
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6964458: Reimplement class meta-data storage to use native memory
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|
2882 } |
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6964458: Reimplement class meta-data storage to use native memory
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|
2883 |
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|
2884 #endif //PRODUCT |
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|
2885 |
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6964458: Reimplement class meta-data storage to use native memory
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|
2886 void InstanceKlass::print_value_on(outputStream* st) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2887 assert(is_klass(), "must be klass"); |
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|
2888 name()->print_value_on(st); |
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6964458: Reimplement class meta-data storage to use native memory
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|
2889 } |
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|
2890 |
da91efe96a93
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|
2891 #ifndef PRODUCT |
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2892 |
0 | 2893 void FieldPrinter::do_field(fieldDescriptor* fd) { |
665
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|
2894 _st->print(BULLET); |
2376
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diff
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|
2895 if (_obj == NULL) { |
0 | 2896 fd->print_on(_st); |
2897 _st->cr(); | |
2898 } else { | |
2899 fd->print_on_for(_st, _obj); | |
2900 _st->cr(); | |
2901 } | |
2902 } | |
2903 | |
2904 | |
6725
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|
2905 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
0 | 2906 Klass::oop_print_on(obj, st); |
2907 | |
6725
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|
2908 if (this == SystemDictionary::String_klass()) { |
0 | 2909 typeArrayOop value = java_lang_String::value(obj); |
2910 juint offset = java_lang_String::offset(obj); | |
2911 juint length = java_lang_String::length(obj); | |
2912 if (value != NULL && | |
2913 value->is_typeArray() && | |
2914 offset <= (juint) value->length() && | |
2915 offset + length <= (juint) value->length()) { | |
665
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|
2916 st->print(BULLET"string: "); |
0 | 2917 Handle h_obj(obj); |
2918 java_lang_String::print(h_obj, st); | |
2919 st->cr(); | |
2920 if (!WizardMode) return; // that is enough | |
2921 } | |
2922 } | |
2923 | |
665
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2924 st->print_cr(BULLET"---- fields (total size %d words):", oop_size(obj)); |
2376
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parents:
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|
2925 FieldPrinter print_field(st, obj); |
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7017732: move static fields into Class to prepare for perm gen removal
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parents:
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diff
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|
2926 do_nonstatic_fields(&print_field); |
0 | 2927 |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
2928 if (this == SystemDictionary::Class_klass()) { |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
changeset
|
2929 st->print(BULLET"signature: "); |
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6814659: separable cleanups and subroutines for 6655638
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|
2930 java_lang_Class::print_signature(obj, st); |
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|
2931 st->cr(); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
2932 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
665
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jrose
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|
2933 st->print(BULLET"fake entry for mirror: "); |
6725
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|
2934 mirrored_klass->print_value_on_maybe_null(st); |
0 | 2935 st->cr(); |
6725
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|
2936 Klass* array_klass = java_lang_Class::array_klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
changeset
|
2937 st->print(BULLET"fake entry for array: "); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2938 array_klass->print_value_on_maybe_null(st); |
0 | 2939 st->cr(); |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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parents:
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diff
changeset
|
2940 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
|
2941 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
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|
2942 Klass* real_klass = java_lang_Class::as_Klass(obj); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2943 if (real_klass != NULL && real_klass->oop_is_instance()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2944 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
|
2945 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2946 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
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parents:
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diff
changeset
|
2947 st->print(BULLET"signature: "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2948 java_lang_invoke_MethodType::print_signature(obj, st); |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
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diff
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|
2949 st->cr(); |
0 | 2950 } |
2951 } | |
2952 | |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2953 #endif //PRODUCT |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1144
diff
changeset
|
2954 |
6725
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|
2955 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
0 | 2956 st->print("a "); |
2957 name()->print_value_on(st); | |
2958 obj->print_address_on(st); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
2959 if (this == SystemDictionary::String_klass() |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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605
diff
changeset
|
2960 && java_lang_String::value(obj) != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
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diff
changeset
|
2961 ResourceMark rm; |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2962 int len = java_lang_String::length(obj); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2963 int plen = (len < 24 ? len : 12); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2964 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2965 st->print(" = \"%s\"", str); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2966 if (len > plen) |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2967 st->print("...[%d]", len); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2968 } else if (this == SystemDictionary::Class_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2969 Klass* k = java_lang_Class::as_Klass(obj); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2970 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2971 if (k != NULL) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2972 k->print_value_on(st); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2973 } else { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2974 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2975 st->print("%s", tname ? tname : "type?"); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2976 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2977 } else if (this == SystemDictionary::MethodType_klass()) { |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2978 st->print(" = "); |
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2979 java_lang_invoke_MethodType::print_signature(obj, st); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2980 } else if (java_lang_boxing_object::is_instance(obj)) { |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2981 st->print(" = "); |
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2982 java_lang_boxing_object::print(obj, st); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2983 } else if (this == SystemDictionary::LambdaForm_klass()) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2984 oop vmentry = java_lang_invoke_LambdaForm::vmentry(obj); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2985 if (vmentry != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2986 st->print(" => "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2987 vmentry->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2988 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2989 } else if (this == SystemDictionary::MemberName_klass()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2990 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(obj); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2991 if (vmtarget != NULL) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2992 st->print(" = "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2993 vmtarget->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2994 } else { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2995 java_lang_invoke_MemberName::clazz(obj)->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2996 st->print("."); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
changeset
|
2997 java_lang_invoke_MemberName::name(obj)->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6203
diff
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|
2998 } |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2999 } |
0 | 3000 } |
3001 | |
6725
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|
3002 const char* InstanceKlass::internal_name() const { |
0 | 3003 return external_name(); |
3004 } | |
3005 | |
7956 | 3006 #if INCLUDE_SERVICES |
3007 // Size Statistics | |
3008 void InstanceKlass::collect_statistics(KlassSizeStats *sz) const { | |
3009 Klass::collect_statistics(sz); | |
3010 | |
3011 sz->_inst_size = HeapWordSize * size_helper(); | |
3012 sz->_vtab_bytes = HeapWordSize * align_object_offset(vtable_length()); | |
3013 sz->_itab_bytes = HeapWordSize * align_object_offset(itable_length()); | |
3014 sz->_nonstatic_oopmap_bytes = HeapWordSize * | |
3015 ((is_interface() || is_anonymous()) ? | |
3016 align_object_offset(nonstatic_oop_map_size()) : | |
3017 nonstatic_oop_map_size()); | |
3018 | |
3019 int n = 0; | |
3020 n += (sz->_methods_array_bytes = sz->count_array(methods())); | |
3021 n += (sz->_method_ordering_bytes = sz->count_array(method_ordering())); | |
3022 n += (sz->_local_interfaces_bytes = sz->count_array(local_interfaces())); | |
3023 n += (sz->_transitive_interfaces_bytes = sz->count_array(transitive_interfaces())); | |
3024 n += (sz->_signers_bytes = sz->count_array(signers())); | |
3025 n += (sz->_fields_bytes = sz->count_array(fields())); | |
3026 n += (sz->_inner_classes_bytes = sz->count_array(inner_classes())); | |
3027 sz->_ro_bytes += n; | |
3028 | |
3029 const ConstantPool* cp = constants(); | |
3030 if (cp) { | |
3031 cp->collect_statistics(sz); | |
3032 } | |
3033 | |
3034 const Annotations* anno = annotations(); | |
3035 if (anno) { | |
3036 anno->collect_statistics(sz); | |
3037 } | |
3038 | |
3039 const Array<Method*>* methods_array = methods(); | |
3040 if (methods()) { | |
3041 for (int i = 0; i < methods_array->length(); i++) { | |
3042 Method* method = methods_array->at(i); | |
3043 if (method) { | |
3044 sz->_method_count ++; | |
3045 method->collect_statistics(sz); | |
3046 } | |
3047 } | |
3048 } | |
3049 } | |
3050 #endif // INCLUDE_SERVICES | |
3051 | |
0 | 3052 // Verification |
3053 | |
3054 class VerifyFieldClosure: public OopClosure { | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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52
diff
changeset
|
3055 protected: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3056 template <class T> void do_oop_work(T* p) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3057 oop obj = oopDesc::load_decode_heap_oop(p); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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52
diff
changeset
|
3058 if (!obj->is_oop_or_null()) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
52
diff
changeset
|
3059 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
0 | 3060 Universe::print(); |
3061 guarantee(false, "boom"); | |
3062 } | |
3063 } | |
113
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coleenp
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diff
changeset
|
3064 public: |
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3065 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
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3066 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
0 | 3067 }; |
3068 | |
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3069 void InstanceKlass::verify_on(outputStream* st) { |
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3070 Klass::verify_on(st); |
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3071 Thread *thread = Thread::current(); |
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3072 |
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3073 #ifndef PRODUCT |
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3074 // Avoid redundant verifies |
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3075 if (_verify_count == Universe::verify_count()) return; |
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3076 _verify_count = Universe::verify_count(); |
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3077 #endif |
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3078 // Verify that klass is present in SystemDictionary |
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3079 if (is_loaded() && !is_anonymous()) { |
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3080 Symbol* h_name = name(); |
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3081 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
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3082 } |
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3083 |
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3084 // Verify static fields |
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3085 VerifyFieldClosure blk; |
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3086 |
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3087 // Verify vtables |
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3088 if (is_linked()) { |
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3089 ResourceMark rm(thread); |
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3090 // $$$ This used to be done only for m/s collections. Doing it |
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3091 // always seemed a valid generalization. (DLD -- 6/00) |
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3092 vtable()->verify(st); |
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3093 } |
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3094 |
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3095 // Verify first subklass |
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3096 if (subklass_oop() != NULL) { |
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3097 guarantee(subklass_oop()->is_metadata(), "should be in metaspace"); |
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3098 guarantee(subklass_oop()->is_klass(), "should be klass"); |
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3099 } |
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3100 |
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3101 // Verify siblings |
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3102 Klass* super = this->super(); |
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3103 Klass* sib = next_sibling(); |
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3104 if (sib != NULL) { |
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3105 if (sib == this) { |
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3106 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
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3107 } |
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|
3108 |
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3109 guarantee(sib->is_metadata(), "should be in metaspace"); |
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3110 guarantee(sib->is_klass(), "should be klass"); |
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3111 guarantee(sib->super() == super, "siblings should have same superklass"); |
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3112 } |
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3113 |
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3114 // Verify implementor fields |
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3115 Klass* im = implementor(); |
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3116 if (im != NULL) { |
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3117 guarantee(is_interface(), "only interfaces should have implementor set"); |
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3118 guarantee(im->is_klass(), "should be klass"); |
6983 | 3119 guarantee(!im->is_interface() || im == this, |
6725
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3120 "implementors cannot be interfaces"); |
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|
3121 } |
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3122 |
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3123 // Verify local interfaces |
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3124 if (local_interfaces()) { |
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3125 Array<Klass*>* local_interfaces = this->local_interfaces(); |
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3126 for (int j = 0; j < local_interfaces->length(); j++) { |
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3127 Klass* e = local_interfaces->at(j); |
6983 | 3128 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
6725
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3129 } |
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|
3130 } |
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|
3131 |
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3132 // Verify transitive interfaces |
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|
3133 if (transitive_interfaces() != NULL) { |
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3134 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
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3135 for (int j = 0; j < transitive_interfaces->length(); j++) { |
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3136 Klass* e = transitive_interfaces->at(j); |
6983 | 3137 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
6725
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|
3138 } |
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|
3139 } |
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|
3140 |
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3141 // Verify methods |
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|
3142 if (methods() != NULL) { |
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|
3143 Array<Method*>* methods = this->methods(); |
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3144 for (int j = 0; j < methods->length(); j++) { |
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|
3145 guarantee(methods->at(j)->is_metadata(), "should be in metaspace"); |
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|
3146 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
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|
3147 } |
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|
3148 for (int j = 0; j < methods->length() - 1; j++) { |
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|
3149 Method* m1 = methods->at(j); |
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3150 Method* m2 = methods->at(j + 1); |
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|
3151 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
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|
3152 } |
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|
3153 } |
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|
3154 |
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3155 // Verify method ordering |
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|
3156 if (method_ordering() != NULL) { |
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|
3157 Array<int>* method_ordering = this->method_ordering(); |
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|
3158 int length = method_ordering->length(); |
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|
3159 if (JvmtiExport::can_maintain_original_method_order() || |
9057
8554c55669b0
8010943: guarantee(length == 0) failed: invalid method ordering length
hseigel
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|
3160 ((UseSharedSpaces || DumpSharedSpaces) && length != 0)) { |
6725
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|
3161 guarantee(length == methods()->length(), "invalid method ordering length"); |
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|
3162 jlong sum = 0; |
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|
3163 for (int j = 0; j < length; j++) { |
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3164 int original_index = method_ordering->at(j); |
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|
3165 guarantee(original_index >= 0, "invalid method ordering index"); |
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3166 guarantee(original_index < length, "invalid method ordering index"); |
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|
3167 sum += original_index; |
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|
3168 } |
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3169 // Verify sum of indices 0,1,...,length-1 |
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3170 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
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3171 } else { |
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3172 guarantee(length == 0, "invalid method ordering length"); |
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|
3173 } |
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|
3174 } |
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|
3175 |
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|
3176 // Verify JNI static field identifiers |
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|
3177 if (jni_ids() != NULL) { |
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3178 jni_ids()->verify(this); |
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|
3179 } |
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|
3180 |
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3181 // Verify other fields |
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3182 if (array_klasses() != NULL) { |
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|
3183 guarantee(array_klasses()->is_metadata(), "should be in metaspace"); |
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3184 guarantee(array_klasses()->is_klass(), "should be klass"); |
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|
3185 } |
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|
3186 if (constants() != NULL) { |
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|
3187 guarantee(constants()->is_metadata(), "should be in metaspace"); |
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3188 guarantee(constants()->is_constantPool(), "should be constant pool"); |
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|
3189 } |
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|
3190 if (protection_domain() != NULL) { |
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|
3191 guarantee(protection_domain()->is_oop(), "should be oop"); |
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3192 } |
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3193 if (host_klass() != NULL) { |
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3194 guarantee(host_klass()->is_metadata(), "should be in metaspace"); |
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3195 guarantee(host_klass()->is_klass(), "should be klass"); |
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3196 } |
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3197 if (signers() != NULL) { |
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3198 guarantee(signers()->is_objArray(), "should be obj array"); |
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3199 } |
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3200 } |
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3201 |
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3202 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
0 | 3203 Klass::oop_verify_on(obj, st); |
3204 VerifyFieldClosure blk; | |
6725
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3205 obj->oop_iterate_no_header(&blk); |
0 | 3206 } |
3207 | |
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3208 |
113
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3209 // JNIid class for jfieldIDs only |
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3210 // Note to reviewers: |
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3211 // These JNI functions are just moved over to column 1 and not changed |
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3212 // in the compressed oops workspace. |
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3213 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
113
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3214 _holder = holder; |
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3215 _offset = offset; |
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3216 _next = next; |
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3217 debug_only(_is_static_field_id = false;) |
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3218 } |
0 | 3219 |
3220 | |
113
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3221 JNIid* JNIid::find(int offset) { |
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3222 JNIid* current = this; |
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3223 while (current != NULL) { |
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3224 if (current->offset() == offset) return current; |
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3225 current = current->next(); |
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3226 } |
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3227 return NULL; |
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3228 } |
0 | 3229 |
3230 void JNIid::deallocate(JNIid* current) { | |
113
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3231 while (current != NULL) { |
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3232 JNIid* next = current->next(); |
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3233 delete current; |
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3234 current = next; |
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3235 } |
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3236 } |
0 | 3237 |
3238 | |
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3239 void JNIid::verify(Klass* holder) { |
6735
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3240 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
113
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3241 int end_field_offset; |
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3242 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
0 | 3243 |
113
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3244 JNIid* current = this; |
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3245 while (current != NULL) { |
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3246 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
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3247 #ifdef ASSERT |
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3248 int o = current->offset(); |
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3249 if (current->is_static_field_id()) { |
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3250 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
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3251 } |
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3252 #endif |
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3253 current = current->next(); |
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3254 } |
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3255 } |
0 | 3256 |
3257 | |
3258 #ifdef ASSERT | |
6725
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3259 void InstanceKlass::set_init_state(ClassState state) { |
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3260 bool good_state = is_shared() ? (_init_state <= state) |
113
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3261 : (_init_state < state); |
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3262 assert(good_state || state == allocated, "illegal state transition"); |
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
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3263 _init_state = (u1)state; |
113
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3264 } |
0 | 3265 #endif |
3266 | |
3267 | |
3268 // RedefineClasses() support for previous versions: | |
3269 | |
6725
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3270 // Purge previous versions |
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3271 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
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3272 if (ik->previous_versions() != NULL) { |
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3273 // This klass has previous versions so see what we can cleanup |
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3274 // while it is safe to do so. |
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3275 |
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3276 int deleted_count = 0; // leave debugging breadcrumbs |
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3277 int live_count = 0; |
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3278 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
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3279 ClassLoaderData::the_null_class_loader_data() : |
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3280 ik->class_loader_data(); |
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3281 |
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3282 // RC_TRACE macro has an embedded ResourceMark |
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3283 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
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3284 ik->external_name(), ik->previous_versions()->length())); |
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3285 |
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3286 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
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3287 // check the previous versions array |
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3288 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
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3289 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
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3290 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
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3291 |
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3292 ConstantPool* pvcp = cp_ref; |
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3293 if (!pvcp->on_stack()) { |
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3294 // If the constant pool isn't on stack, none of the methods |
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3295 // are executing. Delete all the methods, the constant pool and |
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3296 // and this previous version node. |
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3297 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3298 if (method_refs != NULL) { |
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3299 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3300 Method* method = method_refs->at(j); |
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3301 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3302 method_refs->remove_at(j); |
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3303 // method will be freed with associated class. |
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3304 } |
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3305 } |
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3306 // Remove the constant pool |
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3307 delete pv_node; |
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3308 // Since we are traversing the array backwards, we don't have to |
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3309 // do anything special with the index. |
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3310 ik->previous_versions()->remove_at(i); |
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3311 deleted_count++; |
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3312 continue; |
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3313 } else { |
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3314 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
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3315 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
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3316 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
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3317 live_count++; |
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3318 } |
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3319 |
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3320 // At least one method is live in this previous version, clean out |
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3321 // the others or mark them as obsolete. |
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3322 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
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3323 if (method_refs != NULL) { |
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3324 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
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3325 method_refs->length())); |
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3326 for (int j = method_refs->length() - 1; j >= 0; j--) { |
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3327 Method* method = method_refs->at(j); |
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3328 assert(method != NULL, "method ref was unexpectedly cleared"); |
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3329 |
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3330 // Remove the emcp method if it's not executing |
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3331 // If it's been made obsolete by a redefinition of a non-emcp |
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3332 // method, mark it as obsolete but leave it to clean up later. |
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3333 if (!method->on_stack()) { |
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3334 method_refs->remove_at(j); |
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3335 } else if (emcp_method_count == 0) { |
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3336 method->set_is_obsolete(); |
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|
3337 } else { |
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3338 // RC_TRACE macro has an embedded ResourceMark |
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|
3339 RC_TRACE(0x00000200, |
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3340 ("purge: %s(%s): prev method @%d in version @%d is alive", |
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3341 method->name()->as_C_string(), |
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3342 method->signature()->as_C_string(), j, i)); |
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|
3343 } |
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|
3344 } |
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|
3345 } |
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|
3346 } |
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|
3347 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
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3348 RC_TRACE(0x00000200, |
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3349 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
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3350 deleted_count)); |
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|
3351 } |
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|
3352 } |
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3353 |
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3354 // External interface for use during class unloading. |
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3355 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
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3356 // Call with >0 emcp methods since they are not currently being redefined. |
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3357 purge_previous_versions_internal(ik, 1); |
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|
3358 } |
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|
3359 |
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|
3360 |
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3361 // Potentially add an information node that contains pointers to the |
0 | 3362 // interesting parts of the previous version of the_class. |
6725
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3363 // This is also where we clean out any unused references. |
977
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
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diff
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|
3364 // Note that while we delete nodes from the _previous_versions |
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6419370: 4/4 new jmethodID code has tiny holes in synchronization
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diff
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|
3365 // array, we never delete the array itself until the klass is |
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diff
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|
3366 // unloaded. The has_been_redefined() query depends on that fact. |
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|
3367 // |
6725
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3368 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
113
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|
3369 BitMap* emcp_methods, int emcp_method_count) { |
0 | 3370 assert(Thread::current()->is_VM_thread(), |
113
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|
3371 "only VMThread can add previous versions"); |
0 | 3372 |
3373 if (_previous_versions == NULL) { | |
3374 // This is the first previous version so make some space. | |
3375 // Start with 2 elements under the assumption that the class | |
3376 // won't be redefined much. | |
6197 | 3377 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
0 | 3378 GrowableArray<PreviousVersionNode *>(2, true); |
3379 } | |
3380 | |
6725
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3381 ConstantPool* cp_ref = ikh->constants(); |
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3382 |
0 | 3383 // RC_TRACE macro has an embedded ResourceMark |
6725
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3384 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
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|
3385 "on_stack=%d", |
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3386 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
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|
3387 cp_ref->on_stack())); |
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|
3388 |
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3389 // If the constant pool for this previous version of the class |
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3390 // is not marked as being on the stack, then none of the methods |
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3391 // in this previous version of the class are on the stack so |
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3392 // we don't need to create a new PreviousVersionNode. However, |
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|
3393 // we still need to examine older previous versions below. |
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3394 Array<Method*>* old_methods = ikh->methods(); |
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3395 |
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3396 if (cp_ref->on_stack()) { |
0 | 3397 PreviousVersionNode * pv_node = NULL; |
3398 if (emcp_method_count == 0) { | |
6725
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3399 // non-shared ConstantPool gets a reference |
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3400 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
0 | 3401 RC_TRACE(0x00000400, |
6725
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3402 ("add: all methods are obsolete; flushing any EMCP refs")); |
0 | 3403 } else { |
3404 int local_count = 0; | |
6725
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3405 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
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3406 GrowableArray<Method*>(emcp_method_count, true); |
0 | 3407 for (int i = 0; i < old_methods->length(); i++) { |
3408 if (emcp_methods->at(i)) { | |
6725
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|
3409 // this old method is EMCP. Save it only if it's on the stack |
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|
3410 Method* old_method = old_methods->at(i); |
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3411 if (old_method->on_stack()) { |
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|
3412 method_refs->append(old_method); |
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|
3413 } |
0 | 3414 if (++local_count >= emcp_method_count) { |
3415 // no more EMCP methods so bail out now | |
3416 break; | |
3417 } | |
3418 } | |
3419 } | |
6725
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|
3420 // non-shared ConstantPool gets a reference |
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|
3421 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
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|
3422 } |
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|
3423 // append new previous version. |
0 | 3424 _previous_versions->append(pv_node); |
6725
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|
3425 } |
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|
3426 |
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|
3427 // Since the caller is the VMThread and we are at a safepoint, this |
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|
3428 // is a good time to clear out unused references. |
0 | 3429 |
3430 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
3431 _previous_versions->length())); | |
3432 | |
6725
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|
3433 // Purge previous versions not executing on the stack |
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|
3434 purge_previous_versions_internal(this, emcp_method_count); |
0 | 3435 |
3436 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
3437 | |
3438 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
6725
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|
3439 _previous_versions->length() > 0) { |
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diff
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|
3440 // We have a mix of obsolete and EMCP methods so we have to |
0 | 3441 // clear out any matching EMCP method entries the hard way. |
3442 int local_count = 0; | |
3443 for (int i = 0; i < old_methods->length(); i++) { | |
3444 if (!emcp_methods->at(i)) { | |
3445 // only obsolete methods are interesting | |
6725
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|
3446 Method* old_method = old_methods->at(i); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
3447 Symbol* m_name = old_method->name(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
3448 Symbol* m_signature = old_method->signature(); |
0 | 3449 |
6725
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|
3450 // we might not have added the last entry |
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|
3451 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
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|
3452 // check the previous versions array for non executing obsolete methods |
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|
3453 PreviousVersionNode * pv_node = _previous_versions->at(j); |
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|
3454 |
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|
3455 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3456 if (method_refs == NULL) { |
3457 // We have run into a PreviousVersion generation where | |
3458 // all methods were made obsolete during that generation's | |
3459 // RedefineClasses() operation. At the time of that | |
3460 // operation, all EMCP methods were flushed so we don't | |
3461 // have to go back any further. | |
3462 // | |
3463 // A NULL method_refs is different than an empty method_refs. | |
3464 // We cannot infer any optimizations about older generations | |
3465 // from an empty method_refs for the current generation. | |
3466 break; | |
3467 } | |
3468 | |
3469 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
6725
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|
3470 Method* method = method_refs->at(k); |
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|
3471 |
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|
3472 if (!method->is_obsolete() && |
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|
3473 method->name() == m_name && |
0 | 3474 method->signature() == m_signature) { |
3475 // The current RedefineClasses() call has made all EMCP | |
3476 // versions of this method obsolete so mark it as obsolete | |
6725
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|
3477 // and remove the reference. |
0 | 3478 RC_TRACE(0x00000400, |
3479 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
3480 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
3481 | |
3482 method->set_is_obsolete(); | |
6725
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|
3483 // Leave obsolete methods on the previous version list to |
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|
3484 // clean up later. |
0 | 3485 break; |
3486 } | |
3487 } | |
3488 | |
3489 // The previous loop may not find a matching EMCP method, but | |
3490 // that doesn't mean that we can optimize and not go any | |
3491 // further back in the PreviousVersion generations. The EMCP | |
6725
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|
3492 // method for this generation could have already been deleted, |
0 | 3493 // but there still may be an older EMCP method that has not |
6725
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|
3494 // been deleted. |
0 | 3495 } |
3496 | |
3497 if (++local_count >= obsolete_method_count) { | |
3498 // no more obsolete methods so bail out now | |
3499 break; | |
3500 } | |
3501 } | |
3502 } | |
3503 } | |
3504 } // end add_previous_version() | |
3505 | |
3506 | |
6725
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|
3507 // Determine if InstanceKlass has a previous version. |
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|
3508 bool InstanceKlass::has_previous_version() const { |
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3509 return (_previous_versions != NULL && _previous_versions->length() > 0); |
0 | 3510 } // end has_previous_version() |
3511 | |
6725
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|
3512 |
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|
3513 Method* InstanceKlass::method_with_idnum(int idnum) { |
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|
3514 Method* m = NULL; |
0 | 3515 if (idnum < methods()->length()) { |
6725
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3516 m = methods()->at(idnum); |
0 | 3517 } |
3518 if (m == NULL || m->method_idnum() != idnum) { | |
3519 for (int index = 0; index < methods()->length(); ++index) { | |
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3520 m = methods()->at(index); |
0 | 3521 if (m->method_idnum() == idnum) { |
3522 return m; | |
3523 } | |
3524 } | |
3525 } | |
3526 return m; | |
3527 } | |
3528 | |
3529 | |
3530 // Construct a PreviousVersionNode entry for the array hung off | |
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3531 // the InstanceKlass. |
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3532 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
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3533 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
0 | 3534 |
3535 _prev_constant_pool = prev_constant_pool; | |
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3536 _prev_cp_is_weak = prev_cp_is_weak; |
0 | 3537 _prev_EMCP_methods = prev_EMCP_methods; |
3538 } | |
3539 | |
3540 | |
3541 // Destroy a PreviousVersionNode | |
3542 PreviousVersionNode::~PreviousVersionNode() { | |
3543 if (_prev_constant_pool != NULL) { | |
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3544 _prev_constant_pool = NULL; |
0 | 3545 } |
3546 | |
3547 if (_prev_EMCP_methods != NULL) { | |
3548 delete _prev_EMCP_methods; | |
3549 } | |
3550 } | |
3551 | |
3552 | |
3553 // Construct a PreviousVersionInfo entry | |
3554 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
3555 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
3556 _prev_EMCP_method_handles = NULL; | |
3557 | |
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3558 ConstantPool* cp = pv_node->prev_constant_pool(); |
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3559 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
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3560 if (cp == NULL) { |
0 | 3561 return; // robustness |
3562 } | |
3563 | |
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3564 // make the ConstantPool* safe to return |
0 | 3565 _prev_constant_pool_handle = constantPoolHandle(cp); |
3566 | |
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3567 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
0 | 3568 if (method_refs == NULL) { |
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3569 // the InstanceKlass did not have any EMCP methods |
0 | 3570 return; |
3571 } | |
3572 | |
3573 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
3574 | |
3575 int n_methods = method_refs->length(); | |
3576 for (int i = 0; i < n_methods; i++) { | |
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3577 Method* method = method_refs->at(i); |
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3578 assert (method != NULL, "method has been cleared"); |
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3579 if (method == NULL) { |
0 | 3580 continue; // robustness |
3581 } | |
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3582 // make the Method* safe to return |
0 | 3583 _prev_EMCP_method_handles->append(methodHandle(method)); |
3584 } | |
3585 } | |
3586 | |
3587 | |
3588 // Destroy a PreviousVersionInfo | |
3589 PreviousVersionInfo::~PreviousVersionInfo() { | |
3590 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
3591 // don't have to delete it. | |
3592 } | |
3593 | |
3594 | |
3595 // Construct a helper for walking the previous versions array | |
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3596 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
0 | 3597 _previous_versions = ik->previous_versions(); |
3598 _current_index = 0; | |
3599 // _hm needs no initialization | |
3600 _current_p = NULL; | |
3601 } | |
3602 | |
3603 | |
3604 // Destroy a PreviousVersionWalker | |
3605 PreviousVersionWalker::~PreviousVersionWalker() { | |
3606 // Delete the current info just in case the caller didn't walk to | |
3607 // the end of the previous versions list. No harm if _current_p is | |
3608 // already NULL. | |
3609 delete _current_p; | |
3610 | |
3611 // When _hm is destroyed, all the Handles returned in | |
3612 // PreviousVersionInfo objects will be destroyed. | |
3613 // Also, after this destructor is finished it will be | |
3614 // safe to delete the GrowableArray allocated in the | |
3615 // PreviousVersionInfo objects. | |
3616 } | |
3617 | |
3618 | |
3619 // Return the interesting information for the next previous version | |
3620 // of the klass. Returns NULL if there are no more previous versions. | |
3621 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
3622 if (_previous_versions == NULL) { | |
3623 // no previous versions so nothing to return | |
3624 return NULL; | |
3625 } | |
3626 | |
3627 delete _current_p; // cleanup the previous info for the caller | |
3628 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
3629 | |
3630 int length = _previous_versions->length(); | |
3631 | |
3632 while (_current_index < length) { | |
3633 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
6197 | 3634 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
0 | 3635 PreviousVersionInfo(pv_node); |
3636 | |
3637 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
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3638 assert (!cp_h.is_null(), "null cp found in previous version"); |
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3639 |
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3640 // The caller will need to delete pv_info when they are done with it. |
0 | 3641 _current_p = pv_info; |
3642 return pv_info; | |
3643 } | |
3644 | |
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3645 // all of the underlying nodes' info has been deleted |
0 | 3646 return NULL; |
3647 } // end next_previous_version() |