Mercurial > hg > truffle
annotate src/share/vm/classfile/systemDictionary.hpp @ 21598:05ecef0a6a24
LinearScanLifetimeAnalysisPhase: special case StackStoreOp.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Thu, 28 May 2015 13:07:25 +0200 |
parents | ce2113326bc8 |
children | 4c146c9367b6 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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 #ifndef SHARE_VM_CLASSFILE_SYSTEMDICTIONARY_HPP |
26 #define SHARE_VM_CLASSFILE_SYSTEMDICTIONARY_HPP | |
27 | |
28 #include "classfile/classFileStream.hpp" | |
29 #include "classfile/classLoader.hpp" | |
30 #include "oops/objArrayOop.hpp" | |
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31 #include "oops/symbol.hpp" |
1972 | 32 #include "runtime/java.hpp" |
33 #include "runtime/reflectionUtils.hpp" | |
34 #include "utilities/hashtable.hpp" | |
6197 | 35 #include "utilities/hashtable.inline.hpp" |
1972 | 36 |
10405 | 37 |
0 | 38 // The system dictionary stores all loaded classes and maps: |
39 // | |
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40 // [class name,class loader] -> class i.e. [Symbol*,oop] -> Klass* |
0 | 41 // |
42 // Classes are loaded lazily. The default VM class loader is | |
43 // represented as NULL. | |
44 | |
45 // The underlying data structure is an open hash table with a fixed number | |
46 // of buckets. During loading the loader object is locked, (for the VM loader | |
47 // a private lock object is used). Class loading can thus be done concurrently, | |
48 // but only by different loaders. | |
49 // | |
50 // During loading a placeholder (name, loader) is temporarily placed in | |
51 // a side data structure, and is used to detect ClassCircularityErrors | |
52 // and to perform verification during GC. A GC can occur in the midst | |
53 // of class loading, as we call out to Java, have to take locks, etc. | |
54 // | |
55 // When class loading is finished, a new entry is added to the system | |
56 // dictionary and the place holder is removed. Note that the protection | |
57 // domain field of the system dictionary has not yet been filled in when | |
58 // the "real" system dictionary entry is created. | |
59 // | |
60 // Clients of this class who are interested in finding if a class has | |
61 // been completely loaded -- not classes in the process of being loaded -- | |
62 // can read the SystemDictionary unlocked. This is safe because | |
63 // - entries are only deleted at safepoints | |
64 // - readers cannot come to a safepoint while actively examining | |
65 // an entry (an entry cannot be deleted from under a reader) | |
66 // - entries must be fully formed before they are available to concurrent | |
67 // readers (we must ensure write ordering) | |
68 // | |
69 // Note that placeholders are deleted at any time, as they are removed | |
70 // when a class is completely loaded. Therefore, readers as well as writers | |
71 // of placeholders must hold the SystemDictionary_lock. | |
72 // | |
73 | |
74 class Dictionary; | |
75 class PlaceholderTable; | |
76 class LoaderConstraintTable; | |
6197 | 77 template <MEMFLAGS F> class HashtableBucket; |
0 | 78 class ResolutionErrorTable; |
710 | 79 class SymbolPropertyTable; |
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80 class Ticks; |
0 | 81 |
132
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82 // Certain classes are preloaded, such as java.lang.Object and java.lang.String. |
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83 // They are all "well-known", in the sense that no class loader is allowed |
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84 // to provide a different definition. |
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85 // |
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86 // These klasses must all have names defined in vmSymbols. |
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87 |
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88 #define WK_KLASS_ENUM_NAME(kname) kname##_knum |
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89 |
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90 // Each well-known class has a short klass name (like object_klass), |
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91 // a vmSymbol name (like java_lang_Object), and a flag word |
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92 // that makes some minor distinctions, like whether the klass |
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93 // is preloaded, optional, release-specific, etc. |
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94 // The order of these definitions is significant; it is the order in which |
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95 // preloading is actually performed by initialize_preloaded_classes. |
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96 |
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97 #define WK_KLASSES_DO(do_klass) \ |
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98 /* well-known classes */ \ |
6852 | 99 do_klass(Object_klass, java_lang_Object, Pre ) \ |
100 do_klass(String_klass, java_lang_String, Pre ) \ | |
101 do_klass(Class_klass, java_lang_Class, Pre ) \ | |
102 do_klass(Cloneable_klass, java_lang_Cloneable, Pre ) \ | |
103 do_klass(ClassLoader_klass, java_lang_ClassLoader, Pre ) \ | |
104 do_klass(Serializable_klass, java_io_Serializable, Pre ) \ | |
105 do_klass(System_klass, java_lang_System, Pre ) \ | |
106 do_klass(Throwable_klass, java_lang_Throwable, Pre ) \ | |
107 do_klass(Error_klass, java_lang_Error, Pre ) \ | |
108 do_klass(ThreadDeath_klass, java_lang_ThreadDeath, Pre ) \ | |
109 do_klass(Exception_klass, java_lang_Exception, Pre ) \ | |
110 do_klass(RuntimeException_klass, java_lang_RuntimeException, Pre ) \ | |
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111 do_klass(SecurityManager_klass, java_lang_SecurityManager, Pre ) \ |
6852 | 112 do_klass(ProtectionDomain_klass, java_security_ProtectionDomain, Pre ) \ |
113 do_klass(AccessControlContext_klass, java_security_AccessControlContext, Pre ) \ | |
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114 do_klass(SecureClassLoader_klass, java_security_SecureClassLoader, Pre ) \ |
6852 | 115 do_klass(ClassNotFoundException_klass, java_lang_ClassNotFoundException, Pre ) \ |
116 do_klass(NoClassDefFoundError_klass, java_lang_NoClassDefFoundError, Pre ) \ | |
117 do_klass(LinkageError_klass, java_lang_LinkageError, Pre ) \ | |
118 do_klass(ClassCastException_klass, java_lang_ClassCastException, Pre ) \ | |
119 do_klass(ArrayStoreException_klass, java_lang_ArrayStoreException, Pre ) \ | |
120 do_klass(VirtualMachineError_klass, java_lang_VirtualMachineError, Pre ) \ | |
121 do_klass(OutOfMemoryError_klass, java_lang_OutOfMemoryError, Pre ) \ | |
122 do_klass(StackOverflowError_klass, java_lang_StackOverflowError, Pre ) \ | |
123 do_klass(IllegalMonitorStateException_klass, java_lang_IllegalMonitorStateException, Pre ) \ | |
124 do_klass(Reference_klass, java_lang_ref_Reference, Pre ) \ | |
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125 \ |
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126 /* Preload ref klasses and set reference types */ \ |
6852 | 127 do_klass(SoftReference_klass, java_lang_ref_SoftReference, Pre ) \ |
128 do_klass(WeakReference_klass, java_lang_ref_WeakReference, Pre ) \ | |
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129 do_klass(FinalReference_klass, java_lang_ref_FinalReference, Pre ) \ |
6852 | 130 do_klass(PhantomReference_klass, java_lang_ref_PhantomReference, Pre ) \ |
20755 | 131 do_klass(Cleaner_klass, sun_misc_Cleaner, Pre ) \ |
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132 do_klass(Finalizer_klass, java_lang_ref_Finalizer, Pre ) \ |
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133 \ |
6852 | 134 do_klass(Thread_klass, java_lang_Thread, Pre ) \ |
135 do_klass(ThreadGroup_klass, java_lang_ThreadGroup, Pre ) \ | |
136 do_klass(Properties_klass, java_util_Properties, Pre ) \ | |
137 do_klass(reflect_AccessibleObject_klass, java_lang_reflect_AccessibleObject, Pre ) \ | |
138 do_klass(reflect_Field_klass, java_lang_reflect_Field, Pre ) \ | |
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139 do_klass(reflect_Parameter_klass, java_lang_reflect_Parameter, Opt ) \ |
6852 | 140 do_klass(reflect_Method_klass, java_lang_reflect_Method, Pre ) \ |
141 do_klass(reflect_Constructor_klass, java_lang_reflect_Constructor, Pre ) \ | |
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142 \ |
3938 | 143 /* NOTE: needed too early in bootstrapping process to have checks based on JDK version */ \ |
144 /* Universe::is_gte_jdk14x_version() is not set up by this point. */ \ | |
145 /* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \ | |
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146 do_klass(reflect_MagicAccessorImpl_klass, sun_reflect_MagicAccessorImpl, Opt ) \ |
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147 do_klass(reflect_MethodAccessorImpl_klass, sun_reflect_MethodAccessorImpl, Opt_Only_JDK14NewRef) \ |
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148 do_klass(reflect_ConstructorAccessorImpl_klass, sun_reflect_ConstructorAccessorImpl, Opt_Only_JDK14NewRef) \ |
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149 do_klass(reflect_DelegatingClassLoader_klass, sun_reflect_DelegatingClassLoader, Opt ) \ |
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150 do_klass(reflect_ConstantPool_klass, sun_reflect_ConstantPool, Opt_Only_JDK15 ) \ |
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151 do_klass(reflect_UnsafeStaticFieldAccessorImpl_klass, sun_reflect_UnsafeStaticFieldAccessorImpl, Opt_Only_JDK15 ) \ |
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152 do_klass(reflect_CallerSensitive_klass, sun_reflect_CallerSensitive, Opt ) \ |
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153 \ |
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154 /* support for dynamic typing; it's OK if these are NULL in earlier JDKs */ \ |
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155 do_klass(DirectMethodHandle_klass, java_lang_invoke_DirectMethodHandle, Opt ) \ |
6852 | 156 do_klass(MethodHandle_klass, java_lang_invoke_MethodHandle, Pre_JSR292 ) \ |
157 do_klass(MemberName_klass, java_lang_invoke_MemberName, Pre_JSR292 ) \ | |
158 do_klass(MethodHandleNatives_klass, java_lang_invoke_MethodHandleNatives, Pre_JSR292 ) \ | |
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159 do_klass(LambdaForm_klass, java_lang_invoke_LambdaForm, Opt ) \ |
6852 | 160 do_klass(MethodType_klass, java_lang_invoke_MethodType, Pre_JSR292 ) \ |
161 do_klass(BootstrapMethodError_klass, java_lang_BootstrapMethodError, Pre_JSR292 ) \ | |
162 do_klass(CallSite_klass, java_lang_invoke_CallSite, Pre_JSR292 ) \ | |
163 do_klass(ConstantCallSite_klass, java_lang_invoke_ConstantCallSite, Pre_JSR292 ) \ | |
164 do_klass(MutableCallSite_klass, java_lang_invoke_MutableCallSite, Pre_JSR292 ) \ | |
165 do_klass(VolatileCallSite_klass, java_lang_invoke_VolatileCallSite, Pre_JSR292 ) \ | |
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166 /* Note: MethodHandle must be first, and VolatileCallSite last in group */ \ |
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167 \ |
6852 | 168 do_klass(StringBuffer_klass, java_lang_StringBuffer, Pre ) \ |
169 do_klass(StringBuilder_klass, java_lang_StringBuilder, Pre ) \ | |
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170 do_klass(misc_Unsafe_klass, sun_misc_Unsafe, Pre ) \ |
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171 \ |
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172 /* support for CDS */ \ |
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173 do_klass(ByteArrayInputStream_klass, java_io_ByteArrayInputStream, Pre ) \ |
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174 do_klass(File_klass, java_io_File, Pre ) \ |
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175 do_klass(URLClassLoader_klass, java_net_URLClassLoader, Pre ) \ |
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176 do_klass(URL_klass, java_net_URL, Pre ) \ |
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177 do_klass(Jar_Manifest_klass, java_util_jar_Manifest, Pre ) \ |
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178 do_klass(sun_misc_Launcher_klass, sun_misc_Launcher, Pre ) \ |
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179 do_klass(sun_misc_Launcher_AppClassLoader_klass, sun_misc_Launcher_AppClassLoader, Pre ) \ |
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180 do_klass(sun_misc_Launcher_ExtClassLoader_klass, sun_misc_Launcher_ExtClassLoader, Pre ) \ |
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181 do_klass(CodeSource_klass, java_security_CodeSource, Pre ) \ |
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182 \ |
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183 /* It's NULL in non-1.4 JDKs. */ \ |
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184 do_klass(StackTraceElement_klass, java_lang_StackTraceElement, Opt ) \ |
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185 /* Universe::is_gte_jdk14x_version() is not set up by this point. */ \ |
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186 /* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \ |
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187 do_klass(nio_Buffer_klass, java_nio_Buffer, Opt ) \ |
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188 \ |
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189 /* Preload boxing klasses */ \ |
6852 | 190 do_klass(Boolean_klass, java_lang_Boolean, Pre ) \ |
191 do_klass(Character_klass, java_lang_Character, Pre ) \ | |
192 do_klass(Float_klass, java_lang_Float, Pre ) \ | |
193 do_klass(Double_klass, java_lang_Double, Pre ) \ | |
194 do_klass(Byte_klass, java_lang_Byte, Pre ) \ | |
195 do_klass(Short_klass, java_lang_Short, Pre ) \ | |
196 do_klass(Integer_klass, java_lang_Integer, Pre ) \ | |
197 do_klass(Long_klass, java_lang_Long, Pre ) \ | |
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198 \ |
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199 /* Support for JVMCI */ \ |
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200 do_klass(BitSet_klass, java_util_BitSet, Opt ) \ |
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201 /* JVMCI classes. These are loaded on-demand. */ \ |
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202 JVMCI_ONLY(do_klass(Debug_klass, com_oracle_jvmci_debug_Debug, Jvmci)) \ |
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203 JVMCI_ONLY(do_klass(HotSpotCompiledCode_klass, com_oracle_jvmci_hotspot_HotSpotCompiledCode, Jvmci)) \ |
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204 JVMCI_ONLY(do_klass(HotSpotCompiledCode_Comment_klass, com_oracle_jvmci_hotspot_HotSpotCompiledCode_Comment, Jvmci)) \ |
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205 JVMCI_ONLY(do_klass(HotSpotCompiledNmethod_klass, com_oracle_jvmci_hotspot_HotSpotCompiledNmethod, Jvmci)) \ |
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206 JVMCI_ONLY(do_klass(HotSpotForeignCallTarget_klass, com_oracle_jvmci_hotspot_HotSpotForeignCallTarget, Jvmci)) \ |
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207 JVMCI_ONLY(do_klass(HotSpotReferenceMap_klass, com_oracle_jvmci_hotspot_HotSpotReferenceMap, Jvmci)) \ |
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208 JVMCI_ONLY(do_klass(HotSpotOopMap_klass, com_oracle_jvmci_hotspot_HotSpotReferenceMap_HotSpotOopMap, Jvmci)) \ |
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209 JVMCI_ONLY(do_klass(HotSpotInstalledCode_klass, com_oracle_jvmci_hotspot_HotSpotInstalledCode, Jvmci)) \ |
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210 JVMCI_ONLY(do_klass(HotSpotNmethod_klass, com_oracle_jvmci_hotspot_HotSpotNmethod, Jvmci)) \ |
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211 JVMCI_ONLY(do_klass(HotSpotResolvedJavaMethodImpl_klass, com_oracle_jvmci_hotspot_HotSpotResolvedJavaMethodImpl, Jvmci)) \ |
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212 JVMCI_ONLY(do_klass(HotSpotResolvedObjectTypeImpl_klass, com_oracle_jvmci_hotspot_HotSpotResolvedObjectTypeImpl, Jvmci)) \ |
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213 JVMCI_ONLY(do_klass(HotSpotCompressedNullConstant_klass, com_oracle_jvmci_hotspot_HotSpotCompressedNullConstant, Jvmci)) \ |
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214 JVMCI_ONLY(do_klass(HotSpotObjectConstantImpl_klass, com_oracle_jvmci_hotspot_HotSpotObjectConstantImpl, Jvmci)) \ |
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215 JVMCI_ONLY(do_klass(HotSpotMetaspaceConstantImpl_klass, com_oracle_jvmci_hotspot_HotSpotMetaspaceConstantImpl, Jvmci)) \ |
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216 JVMCI_ONLY(do_klass(HotSpotStackFrameReference_klass, com_oracle_jvmci_hotspot_HotSpotStackFrameReference, Jvmci)) \ |
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217 JVMCI_ONLY(do_klass(CompilationTask_klass, com_oracle_graal_hotspot_CompilationTask, Jvmci)) \ |
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218 JVMCI_ONLY(do_klass(Assumptions_ConcreteMethod_klass, com_oracle_jvmci_meta_Assumptions_ConcreteMethod, Jvmci)) \ |
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219 JVMCI_ONLY(do_klass(Assumptions_NoFinalizableSubclass_klass, com_oracle_jvmci_meta_Assumptions_NoFinalizableSubclass, Jvmci))\ |
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220 JVMCI_ONLY(do_klass(Assumptions_ConcreteSubtype_klass, com_oracle_jvmci_meta_Assumptions_ConcreteSubtype, Jvmci)) \ |
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221 JVMCI_ONLY(do_klass(Assumptions_LeafType_klass, com_oracle_jvmci_meta_Assumptions_LeafType, Jvmci)) \ |
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222 JVMCI_ONLY(do_klass(Assumptions_CallSiteTargetValue_klass, com_oracle_jvmci_meta_Assumptions_CallSiteTargetValue, Jvmci)) \ |
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223 JVMCI_ONLY(do_klass(BytecodePosition_klass, com_oracle_jvmci_code_BytecodePosition, Jvmci)) \ |
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224 JVMCI_ONLY(do_klass(DebugInfo_klass, com_oracle_jvmci_code_DebugInfo, Jvmci)) \ |
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225 JVMCI_ONLY(do_klass(RegisterSaveLayout_klass, com_oracle_jvmci_code_RegisterSaveLayout, Jvmci)) \ |
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226 JVMCI_ONLY(do_klass(BytecodeFrame_klass, com_oracle_jvmci_code_BytecodeFrame, Jvmci)) \ |
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227 JVMCI_ONLY(do_klass(CompilationResult_Call_klass, com_oracle_jvmci_code_CompilationResult_Call, Jvmci)) \ |
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228 JVMCI_ONLY(do_klass(CompilationResult_ConstantReference_klass, com_oracle_jvmci_code_CompilationResult_ConstantReference, Jvmci)) \ |
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229 JVMCI_ONLY(do_klass(CompilationResult_DataPatch_klass, com_oracle_jvmci_code_CompilationResult_DataPatch, Jvmci)) \ |
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230 JVMCI_ONLY(do_klass(CompilationResult_DataSectionReference_klass, com_oracle_jvmci_code_CompilationResult_DataSectionReference, Jvmci)) \ |
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231 JVMCI_ONLY(do_klass(CompilationResult_ExceptionHandler_klass, com_oracle_jvmci_code_CompilationResult_ExceptionHandler, Jvmci))\ |
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232 JVMCI_ONLY(do_klass(CompilationResult_Mark_klass, com_oracle_jvmci_code_CompilationResult_Mark, Jvmci)) \ |
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233 JVMCI_ONLY(do_klass(CompilationResult_Infopoint_klass, com_oracle_jvmci_code_CompilationResult_Infopoint, Jvmci)) \ |
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234 JVMCI_ONLY(do_klass(CompilationResult_Site_klass, com_oracle_jvmci_code_CompilationResult_Site, Jvmci)) \ |
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235 JVMCI_ONLY(do_klass(InfopointReason_klass, com_oracle_jvmci_code_InfopointReason, Jvmci)) \ |
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236 JVMCI_ONLY(do_klass(InstalledCode_klass, com_oracle_jvmci_code_InstalledCode, Jvmci)) \ |
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237 JVMCI_ONLY(do_klass(code_Register_klass, com_oracle_jvmci_code_Register, Jvmci)) \ |
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238 JVMCI_ONLY(do_klass(RegisterValue_klass, com_oracle_jvmci_code_RegisterValue, Jvmci)) \ |
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239 JVMCI_ONLY(do_klass(RegisterCategory_klass, com_oracle_jvmci_code_Register_RegisterCategory, Jvmci)) \ |
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240 JVMCI_ONLY(do_klass(StackSlot_klass, com_oracle_jvmci_code_StackSlot, Jvmci)) \ |
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241 JVMCI_ONLY(do_klass(StackLockValue_klass, com_oracle_jvmci_code_StackLockValue, Jvmci)) \ |
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242 JVMCI_ONLY(do_klass(VirtualObject_klass, com_oracle_jvmci_code_VirtualObject, Jvmci)) \ |
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243 JVMCI_ONLY(do_klass(SpeculationLog_klass, com_oracle_jvmci_code_SpeculationLog, Jvmci)) \ |
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244 JVMCI_ONLY(do_klass(JavaConstant_klass, com_oracle_jvmci_meta_JavaConstant, Jvmci)) \ |
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245 JVMCI_ONLY(do_klass(PrimitiveConstant_klass, com_oracle_jvmci_meta_PrimitiveConstant, Jvmci)) \ |
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246 JVMCI_ONLY(do_klass(RawConstant_klass, com_oracle_jvmci_meta_RawConstant, Jvmci)) \ |
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247 JVMCI_ONLY(do_klass(NullConstant_klass, com_oracle_jvmci_meta_NullConstant, Jvmci)) \ |
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248 JVMCI_ONLY(do_klass(ExceptionHandler_klass, com_oracle_jvmci_meta_ExceptionHandler, Jvmci)) \ |
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249 JVMCI_ONLY(do_klass(Kind_klass, com_oracle_jvmci_meta_Kind, Jvmci)) \ |
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250 JVMCI_ONLY(do_klass(LIRKind_klass, com_oracle_jvmci_meta_LIRKind, Jvmci)) \ |
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251 JVMCI_ONLY(do_klass(JavaMethod_klass, com_oracle_jvmci_meta_JavaMethod, Jvmci)) \ |
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252 JVMCI_ONLY(do_klass(JavaType_klass, com_oracle_jvmci_meta_JavaType, Jvmci)) \ |
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253 JVMCI_ONLY(do_klass(AbstractValue_klass, com_oracle_jvmci_meta_AbstractValue, Jvmci)) \ |
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254 |
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255 /*end*/ |
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256 |
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257 |
0 | 258 class SystemDictionary : AllStatic { |
259 friend class VMStructs; | |
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260 friend class SystemDictionaryHandles; |
0 | 261 |
262 public: | |
132
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263 enum WKID { |
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264 NO_WKID = 0, |
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265 |
3938 | 266 #define WK_KLASS_ENUM(name, symbol, ignore_o) WK_KLASS_ENUM_NAME(name), WK_KLASS_ENUM_NAME(symbol) = WK_KLASS_ENUM_NAME(name), |
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267 WK_KLASSES_DO(WK_KLASS_ENUM) |
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268 #undef WK_KLASS_ENUM |
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269 |
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270 WKID_LIMIT, |
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271 |
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272 #ifdef JVMCI |
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273 FIRST_JVMCI_WKID = WK_KLASS_ENUM_NAME(Debug_klass), |
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274 LAST_JVMCI_WKID = WK_KLASS_ENUM_NAME(AbstractValue_klass), |
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275 #endif |
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276 |
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277 FIRST_WKID = NO_WKID + 1 |
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278 }; |
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279 |
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280 enum InitOption { |
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281 Pre, // preloaded; error if not present |
6852 | 282 Pre_JSR292, // preloaded if EnableInvokeDynamic |
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283 |
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284 // Order is significant. Options before this point require resolve_or_fail. |
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285 // Options after this point will use resolve_or_null instead. |
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286 |
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287 Opt, // preload tried; NULL if not present |
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288 Opt_Only_JDK14NewRef, // preload tried; use only with NewReflection |
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289 Opt_Only_JDK15, // preload tried; use only with JDK1.5+ |
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290 #ifdef JVMCI |
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291 Jvmci, // preload tried; error if not present, use only with JVMCI |
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292 #endif |
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293 OPTION_LIMIT, |
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294 CEIL_LG_OPTION_LIMIT = 4 // OPTION_LIMIT <= (1<<CEIL_LG_OPTION_LIMIT) |
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295 }; |
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296 |
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297 |
0 | 298 // Returns a class with a given class name and class loader. Loads the |
299 // class if needed. If not found a NoClassDefFoundError or a | |
300 // ClassNotFoundException is thrown, depending on the value on the | |
301 // throw_error flag. For most uses the throw_error argument should be set | |
302 // to true. | |
303 | |
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304 static Klass* resolve_or_fail(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS); |
0 | 305 // Convenient call for null loader and protection domain. |
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306 static Klass* resolve_or_fail(Symbol* class_name, bool throw_error, TRAPS); |
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307 protected: |
0 | 308 // handle error translation for resolve_or_null results |
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309 static Klass* handle_resolution_exception(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, KlassHandle klass_h, TRAPS); |
0 | 310 |
311 public: | |
312 | |
313 // Returns a class with a given class name and class loader. | |
314 // Loads the class if needed. If not found NULL is returned. | |
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315 static Klass* resolve_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
0 | 316 // Version with null loader and protection domain |
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317 static Klass* resolve_or_null(Symbol* class_name, TRAPS); |
0 | 318 |
319 // Resolve a superclass or superinterface. Called from ClassFileParser, | |
320 // parse_interfaces, resolve_instance_class_or_null, load_shared_class | |
321 // "child_name" is the class whose super class or interface is being resolved. | |
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322 static Klass* resolve_super_or_fail(Symbol* child_name, |
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323 Symbol* class_name, |
0 | 324 Handle class_loader, |
325 Handle protection_domain, | |
326 bool is_superclass, | |
327 TRAPS); | |
328 | |
329 // Parse new stream. This won't update the system dictionary or | |
330 // class hierarchy, simply parse the stream. Used by JVMTI RedefineClasses. | |
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331 static Klass* parse_stream(Symbol* class_name, |
0 | 332 Handle class_loader, |
333 Handle protection_domain, | |
334 ClassFileStream* st, | |
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335 TRAPS) { |
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336 KlassHandle nullHandle; |
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337 return parse_stream(class_name, class_loader, protection_domain, st, nullHandle, NULL, THREAD); |
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338 } |
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339 static Klass* parse_stream(Symbol* class_name, |
431
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340 Handle class_loader, |
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341 Handle protection_domain, |
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342 ClassFileStream* st, |
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343 KlassHandle host_klass, |
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344 GrowableArray<Handle>* cp_patches, |
0 | 345 TRAPS); |
346 | |
347 // Resolve from stream (called by jni_DefineClass and JVM_DefineClass) | |
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348 static Klass* resolve_from_stream(Symbol* class_name, Handle class_loader, |
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349 Handle protection_domain, |
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350 ClassFileStream* st, bool verify, TRAPS); |
0 | 351 |
352 // Lookup an already loaded class. If not found NULL is returned. | |
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353 static Klass* find(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
0 | 354 |
355 // Lookup an already loaded instance or array class. | |
356 // Do not make any queries to class loaders; consult only the cache. | |
357 // If not found NULL is returned. | |
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358 static Klass* find_instance_or_array_klass(Symbol* class_name, |
0 | 359 Handle class_loader, |
360 Handle protection_domain, | |
361 TRAPS); | |
362 | |
363 // Lookup an instance or array class that has already been loaded | |
364 // either into the given class loader, or else into another class | |
365 // loader that is constrained (via loader constraints) to produce | |
366 // a consistent class. Do not take protection domains into account. | |
367 // Do not make any queries to class loaders; consult only the cache. | |
368 // Return NULL if the class is not found. | |
369 // | |
370 // This function is a strict superset of find_instance_or_array_klass. | |
371 // This function (the unchecked version) makes a conservative prediction | |
372 // of the result of the checked version, assuming successful lookup. | |
373 // If both functions return non-null, they must return the same value. | |
374 // Also, the unchecked version may sometimes be non-null where the | |
375 // checked version is null. This can occur in several ways: | |
376 // 1. No query has yet been made to the class loader. | |
377 // 2. The class loader was queried, but chose not to delegate. | |
378 // 3. ClassLoader.checkPackageAccess rejected a proposed protection domain. | |
379 // 4. Loading was attempted, but there was a linkage error of some sort. | |
380 // In all of these cases, the loader constraints on this type are | |
381 // satisfied, and it is safe for classes in the given class loader | |
382 // to manipulate strongly-typed values of the found class, subject | |
383 // to local linkage and access checks. | |
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384 static Klass* find_constrained_instance_or_array_klass(Symbol* class_name, |
0 | 385 Handle class_loader, |
386 TRAPS); | |
387 | |
388 // Iterate over all klasses in dictionary | |
389 // Just the classes from defining class loaders | |
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390 static void classes_do(void f(Klass*)); |
0 | 391 // Added for initialize_itable_for_klass to handle exceptions |
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392 static void classes_do(void f(Klass*, TRAPS), TRAPS); |
0 | 393 // All classes, and their class loaders |
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394 static void classes_do(void f(Klass*, ClassLoaderData*)); |
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395 |
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396 static void placeholders_do(void f(Symbol*)); |
0 | 397 |
398 // Iterate over all methods in all klasses in dictionary | |
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399 static void methods_do(void f(Method*)); |
0 | 400 |
401 // Garbage collection support | |
402 | |
403 // This method applies "blk->do_oop" to all the pointers to "system" | |
404 // classes and loaders. | |
405 static void always_strong_oops_do(OopClosure* blk); | |
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406 static void always_strong_classes_do(KlassClosure* closure); |
0 | 407 |
408 // Unload (that is, break root links to) all unmarked classes and | |
409 // loaders. Returns "true" iff something was unloaded. | |
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410 static bool do_unloading(BoolObjectClosure* is_alive, bool clean_alive = true); |
0 | 411 |
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412 // Used by DumpSharedSpaces only to remove classes that failed verification |
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413 static void remove_classes_in_error_state(); |
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414 |
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415 static int calculate_systemdictionary_size(int loadedclasses); |
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416 |
0 | 417 // Applies "f->do_oop" to all root oops in the system dictionary. |
418 static void oops_do(OopClosure* f); | |
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419 static void roots_oops_do(OopClosure* strong, OopClosure* weak); |
0 | 420 |
421 // System loader lock | |
422 static oop system_loader_lock() { return _system_loader_lock_obj; } | |
423 | |
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424 protected: |
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425 // Extended Redefine classes support (tbi) |
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426 static void preloaded_classes_do(KlassClosure* f); |
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427 static void lazily_loaded_classes_do(KlassClosure* f); |
0 | 428 public: |
429 // Sharing support. | |
430 static void reorder_dictionary(); | |
431 static void copy_buckets(char** top, char* end); | |
432 static void copy_table(char** top, char* end); | |
433 static void reverse(); | |
6197 | 434 static void set_shared_dictionary(HashtableBucket<mtClass>* t, int length, |
0 | 435 int number_of_entries); |
436 // Printing | |
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437 static void print(bool details = true); |
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438 static void print_shared(bool details = true); |
0 | 439 static void print_class_statistics() PRODUCT_RETURN; |
440 static void print_method_statistics() PRODUCT_RETURN; | |
441 | |
442 // Number of contained klasses | |
443 // This is both fully loaded classes and classes in the process | |
444 // of being loaded | |
445 static int number_of_classes(); | |
446 | |
447 // Monotonically increasing counter which grows as classes are | |
448 // loaded or modifications such as hot-swapping or setting/removing | |
449 // of breakpoints are performed | |
450 static inline int number_of_modifications() { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; } | |
451 // Needed by evolution and breakpoint code | |
452 static inline void notice_modification() { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications; } | |
453 | |
454 // Verification | |
455 static void verify(); | |
456 | |
457 #ifdef ASSERT | |
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458 static bool is_internal_format(Symbol* class_name); |
0 | 459 #endif |
460 | |
461 // Initialization | |
462 static void initialize(TRAPS); | |
463 | |
464 // Fast access to commonly used classes (preloaded) | |
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465 static Klass* check_klass(Klass* k) { |
0 | 466 assert(k != NULL, "preloaded klass not initialized"); |
467 return k; | |
468 } | |
469 | |
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470 static Klass* check_klass_Pre( Klass* k) { return check_klass(k); } |
6852 | 471 static Klass* check_klass_Pre_JSR292(Klass* k) { return EnableInvokeDynamic ? check_klass(k) : k; } |
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472 static Klass* check_klass_Opt( Klass* k) { return k; } |
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473 static Klass* check_klass_Opt_Only_JDK15(Klass* k) { |
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474 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only"); |
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475 return k; |
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476 } |
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477 static Klass* check_klass_Opt_Only_JDK14NewRef(Klass* k) { |
0 | 478 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only"); |
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479 // despite the optional loading, if you use this it must be present: |
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480 return check_klass(k); |
0 | 481 } |
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482 #ifdef JVMCI |
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483 static Klass* check_klass_Jvmci(Klass* k) { return k; } |
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484 #endif |
0 | 485 |
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486 static bool initialize_wk_klass(WKID id, int init_opt, TRAPS); |
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487 static void initialize_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS); |
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488 static void initialize_wk_klasses_through(WKID end_id, WKID &start_id, TRAPS) { |
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489 int limit = (int)end_id + 1; |
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490 initialize_wk_klasses_until((WKID) limit, start_id, THREAD); |
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491 } |
0 | 492 |
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493 public: |
3938 | 494 #define WK_KLASS_DECLARE(name, symbol, option) \ |
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495 static Klass* name() { return check_klass_##option(_well_known_klasses[WK_KLASS_ENUM_NAME(name)]); } \ |
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496 static Klass** name##_addr() { \ |
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497 return &SystemDictionary::_well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)]; \ |
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498 } |
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499 WK_KLASSES_DO(WK_KLASS_DECLARE); |
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500 #undef WK_KLASS_DECLARE |
0 | 501 |
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502 static Klass* well_known_klass(WKID id) { |
3938 | 503 assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob"); |
504 return _well_known_klasses[id]; | |
505 } | |
506 | |
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507 static Klass** well_known_klass_addr(WKID id) { |
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508 assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob"); |
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509 return &_well_known_klasses[id]; |
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510 } |
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511 |
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512 // Local definition for direct access to the private array: |
147 | 513 #define WK_KLASS(name) _well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)] |
0 | 514 |
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515 static Klass* box_klass(BasicType t) { |
0 | 516 assert((uint)t < T_VOID+1, "range check"); |
517 return check_klass(_box_klasses[t]); | |
518 } | |
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519 static BasicType box_klass_type(Klass* k); // inverse of box_klass |
0 | 520 |
521 // methods returning lazily loaded klasses | |
522 // The corresponding method to load the class must be called before calling them. | |
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523 static Klass* abstract_ownable_synchronizer_klass() { return check_klass(_abstract_ownable_synchronizer_klass); } |
0 | 524 |
525 static void load_abstract_ownable_synchronizer_klass(TRAPS); | |
526 | |
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527 protected: |
0 | 528 // Tells whether ClassLoader.loadClassInternal is present |
529 static bool has_loadClassInternal() { return _has_loadClassInternal; } | |
530 | |
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531 // Returns the class loader data to be used when looking up/updating the |
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532 // system dictionary. |
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533 static ClassLoaderData *class_loader_data(Handle class_loader) { |
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534 return ClassLoaderData::class_loader_data(class_loader()); |
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535 } |
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536 |
0 | 537 public: |
538 // Tells whether ClassLoader.checkPackageAccess is present | |
539 static bool has_checkPackageAccess() { return _has_checkPackageAccess; } | |
540 | |
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541 static bool Parameter_klass_loaded() { return WK_KLASS(reflect_Parameter_klass) != NULL; } |
1142 | 542 static bool Class_klass_loaded() { return WK_KLASS(Class_klass) != NULL; } |
543 static bool Cloneable_klass_loaded() { return WK_KLASS(Cloneable_klass) != NULL; } | |
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544 static bool Object_klass_loaded() { return WK_KLASS(Object_klass) != NULL; } |
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545 static bool ClassLoader_klass_loaded() { return WK_KLASS(ClassLoader_klass) != NULL; } |
0 | 546 |
547 // Returns default system loader | |
548 static oop java_system_loader(); | |
549 | |
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550 #ifdef JVMCI |
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551 // Returns the JVMCI loader. This will be NULL if !UseJVMCIClassLoader |
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552 // in which case it's equivalent to the boot loader |
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553 static oop jvmci_loader(); |
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554 // Sets the JVMCI loader. This is called at most once. |
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555 static void init_jvmci_loader(oop loader); |
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556 #endif |
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557 |
0 | 558 // Compute the default system loader |
559 static void compute_java_system_loader(TRAPS); | |
560 | |
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561 // Register a new class loader |
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562 static ClassLoaderData* register_loader(Handle class_loader, TRAPS); |
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563 protected: |
0 | 564 // Mirrors for primitive classes (created eagerly) |
565 static oop check_mirror(oop m) { | |
566 assert(m != NULL, "mirror not initialized"); | |
567 return m; | |
568 } | |
569 | |
570 public: | |
571 // Note: java_lang_Class::primitive_type is the inverse of java_mirror | |
572 | |
573 // Check class loader constraints | |
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574 static bool add_loader_constraint(Symbol* name, Handle loader1, |
0 | 575 Handle loader2, TRAPS); |
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576 static Symbol* check_signature_loaders(Symbol* signature, Handle loader1, |
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577 Handle loader2, bool is_method, TRAPS); |
0 | 578 |
710 | 579 // JSR 292 |
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580 // find a java.lang.invoke.MethodHandle.invoke* method for a given signature |
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581 // (asks Java to compute it if necessary, except in a compiler thread) |
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582 static methodHandle find_method_handle_invoker(Symbol* name, |
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583 Symbol* signature, |
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584 KlassHandle accessing_klass, |
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585 Handle *appendix_result, |
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586 Handle *method_type_result, |
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587 TRAPS); |
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588 // for a given signature, find the internal MethodHandle method (linkTo* or invokeBasic) |
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589 // (does not ask Java, since this is a low-level intrinsic defined by the JVM) |
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590 static methodHandle find_method_handle_intrinsic(vmIntrinsics::ID iid, |
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591 Symbol* signature, |
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592 TRAPS); |
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593 // find a java.lang.invoke.MethodType object for a given signature |
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594 // (asks Java to compute it if necessary, except in a compiler thread) |
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595 static Handle find_method_handle_type(Symbol* signature, |
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596 KlassHandle accessing_klass, |
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597 TRAPS); |
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598 |
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599 // ask Java to compute a java.lang.invoke.MethodHandle object for a given CP entry |
1602 | 600 static Handle link_method_handle_constant(KlassHandle caller, |
601 int ref_kind, //e.g., JVM_REF_invokeVirtual | |
602 KlassHandle callee, | |
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603 Symbol* name, |
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604 Symbol* signature, |
1602 | 605 TRAPS); |
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606 |
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607 // ask Java to create a dynamic call site, while linking an invokedynamic op |
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608 static methodHandle find_dynamic_call_site_invoker(KlassHandle caller, |
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609 Handle bootstrap_method, |
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610 Symbol* name, |
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611 Symbol* type, |
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612 Handle *appendix_result, |
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613 Handle *method_type_result, |
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614 TRAPS); |
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615 |
0 | 616 // Utility for printing loader "name" as part of tracing constraints |
617 static const char* loader_name(oop loader) { | |
618 return ((loader) == NULL ? "<bootloader>" : | |
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619 InstanceKlass::cast((loader)->klass())->name()->as_C_string() ); |
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620 } |
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621 static const char* loader_name(ClassLoaderData* loader_data) { |
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622 return (loader_data->class_loader() == NULL ? "<bootloader>" : |
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623 InstanceKlass::cast((loader_data->class_loader())->klass())->name()->as_C_string() ); |
0 | 624 } |
625 | |
626 // Record the error when the first attempt to resolve a reference from a constant | |
627 // pool entry to a class fails. | |
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628 static void add_resolution_error(constantPoolHandle pool, int which, Symbol* error); |
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629 static void delete_resolution_error(ConstantPool* pool); |
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630 static Symbol* find_resolution_error(constantPoolHandle pool, int which); |
0 | 631 |
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632 protected: |
0 | 633 |
634 enum Constants { | |
635 _loader_constraint_size = 107, // number of entries in constraint table | |
636 _resolution_error_size = 107, // number of entries in resolution error table | |
710 | 637 _invoke_method_size = 139, // number of entries in invoke method table |
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638 _nof_buckets = 1009, // number of buckets in hash table for placeholders |
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639 _old_default_sdsize = 1009, // backward compat for system dictionary size |
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640 _prime_array_size = 8, // array of primes for system dictionary size |
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641 _average_depth_goal = 3 // goal for lookup length |
0 | 642 }; |
643 | |
644 | |
645 // Static variables | |
646 | |
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647 // hashtable sizes for system dictionary to allow growth |
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648 // prime numbers for system dictionary size |
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649 static int _sdgeneration; |
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650 static const int _primelist[_prime_array_size]; |
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651 |
0 | 652 // Hashtable holding loaded classes. |
653 static Dictionary* _dictionary; | |
654 | |
655 // Hashtable holding placeholders for classes being loaded. | |
656 static PlaceholderTable* _placeholders; | |
657 | |
658 // Hashtable holding classes from the shared archive. | |
659 static Dictionary* _shared_dictionary; | |
660 | |
661 // Monotonically increasing counter which grows with | |
662 // _number_of_classes as well as hot-swapping and breakpoint setting | |
663 // and removal. | |
664 static int _number_of_modifications; | |
665 | |
666 // Lock object for system class loader | |
667 static oop _system_loader_lock_obj; | |
668 | |
669 // Constraints on class loaders | |
670 static LoaderConstraintTable* _loader_constraints; | |
671 | |
672 // Resolution errors | |
673 static ResolutionErrorTable* _resolution_errors; | |
674 | |
710 | 675 // Invoke methods (JSR 292) |
676 static SymbolPropertyTable* _invoke_method_table; | |
677 | |
0 | 678 public: |
679 // for VM_CounterDecay iteration support | |
680 friend class CounterDecay; | |
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681 static Klass* try_get_next_class(); |
0 | 682 |
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683 protected: |
0 | 684 static void validate_protection_domain(instanceKlassHandle klass, |
685 Handle class_loader, | |
686 Handle protection_domain, TRAPS); | |
687 | |
688 friend class VM_PopulateDumpSharedSpace; | |
689 friend class TraversePlaceholdersClosure; | |
690 static Dictionary* dictionary() { return _dictionary; } | |
691 static Dictionary* shared_dictionary() { return _shared_dictionary; } | |
692 static PlaceholderTable* placeholders() { return _placeholders; } | |
693 static LoaderConstraintTable* constraints() { return _loader_constraints; } | |
694 static ResolutionErrorTable* resolution_errors() { return _resolution_errors; } | |
710 | 695 static SymbolPropertyTable* invoke_method_table() { return _invoke_method_table; } |
0 | 696 |
697 // Basic loading operations | |
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698 static Klass* resolve_instance_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
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699 static Klass* resolve_array_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
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700 static instanceKlassHandle handle_parallel_super_load(Symbol* class_name, Symbol* supername, Handle class_loader, Handle protection_domain, Handle lockObject, TRAPS); |
0 | 701 // Wait on SystemDictionary_lock; unlocks lockObject before |
702 // waiting; relocks lockObject with correct recursion count | |
703 // after waiting, but before reentering SystemDictionary_lock | |
704 // to preserve lock order semantics. | |
705 static void double_lock_wait(Handle lockObject, TRAPS); | |
706 static void define_instance_class(instanceKlassHandle k, TRAPS); | |
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707 static instanceKlassHandle find_or_define_instance_class(Symbol* class_name, |
0 | 708 Handle class_loader, |
709 instanceKlassHandle k, TRAPS); | |
710 static instanceKlassHandle load_shared_class(instanceKlassHandle ik, | |
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711 Handle class_loader, |
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712 Handle protection_domain, |
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713 TRAPS); |
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714 static instanceKlassHandle load_instance_class(Symbol* class_name, Handle class_loader, TRAPS); |
0 | 715 static Handle compute_loader_lock_object(Handle class_loader, TRAPS); |
716 static void check_loader_lock_contention(Handle loader_lock, TRAPS); | |
514 | 717 static bool is_parallelCapable(Handle class_loader); |
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718 static bool is_parallelDefine(Handle class_loader); |
0 | 719 |
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720 public: |
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721 static instanceKlassHandle load_shared_class(Symbol* class_name, |
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722 Handle class_loader, |
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723 TRAPS); |
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724 static bool is_ext_class_loader(Handle class_loader); |
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725 |
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726 protected: |
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727 static Klass* find_shared_class(Symbol* class_name); |
0 | 728 |
729 // Setup link to hierarchy | |
730 static void add_to_hierarchy(instanceKlassHandle k, TRAPS); | |
731 | |
10405 | 732 // event based tracing |
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733 static void post_class_load_event(const Ticks& start_time, instanceKlassHandle k, |
10405 | 734 Handle initiating_loader); |
0 | 735 // We pass in the hashtable index so we can calculate it outside of |
736 // the SystemDictionary_lock. | |
737 | |
738 // Basic find on loaded classes | |
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739 static Klass* find_class(int index, unsigned int hash, |
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740 Symbol* name, ClassLoaderData* loader_data); |
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741 static Klass* find_class(Symbol* class_name, ClassLoaderData* loader_data); |
0 | 742 |
743 // Basic find on classes in the midst of being loaded | |
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744 static Symbol* find_placeholder(Symbol* name, ClassLoaderData* loader_data); |
0 | 745 |
746 // Updating entry in dictionary | |
747 // Add a completely loaded class | |
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748 static void add_klass(int index, Symbol* class_name, |
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749 ClassLoaderData* loader_data, KlassHandle obj); |
0 | 750 |
751 // Add a placeholder for a class being loaded | |
752 static void add_placeholder(int index, | |
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753 Symbol* class_name, |
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754 ClassLoaderData* loader_data); |
0 | 755 static void remove_placeholder(int index, |
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756 Symbol* class_name, |
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757 ClassLoaderData* loader_data); |
0 | 758 |
759 // Performs cleanups after resolve_super_or_fail. This typically needs | |
760 // to be called on failure. | |
761 // Won't throw, but can block. | |
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762 static void resolution_cleanups(Symbol* class_name, |
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763 ClassLoaderData* loader_data, |
0 | 764 TRAPS); |
765 | |
766 // Initialization | |
767 static void initialize_preloaded_classes(TRAPS); | |
768 | |
769 // Class loader constraints | |
770 static void check_constraints(int index, unsigned int hash, | |
771 instanceKlassHandle k, Handle loader, | |
772 bool defining, TRAPS); | |
773 static void update_dictionary(int d_index, unsigned int d_hash, | |
774 int p_index, unsigned int p_hash, | |
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775 instanceKlassHandle k, Handle loader, |
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776 TRAPS); |
0 | 777 |
778 // Variables holding commonly used klasses (preloaded) | |
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779 static Klass* _well_known_klasses[]; |
0 | 780 |
781 // Lazily loaded klasses | |
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782 static Klass* volatile _abstract_ownable_synchronizer_klass; |
0 | 783 |
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784 // table of box klasses (int_klass, etc.) |
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785 static Klass* _box_klasses[T_VOID+1]; |
0 | 786 |
787 static oop _java_system_loader; | |
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788 #ifdef JVMCI |
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789 static oop _jvmci_loader; |
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790 #endif |
0 | 791 |
792 static bool _has_loadClassInternal; | |
793 static bool _has_checkPackageAccess; | |
794 }; | |
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795 |
1972 | 796 #endif // SHARE_VM_CLASSFILE_SYSTEMDICTIONARY_HPP |