Mercurial > hg > truffle
annotate src/share/vm/classfile/systemDictionary.hpp @ 18487:0f4813e0b4a9
Use asConstant() instead of asJavaConstant() where possible.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Mon, 24 Nov 2014 12:13:31 +0100 |
parents | 23a2faa68470 |
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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 |
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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 ) \ | |
114 do_klass(ClassNotFoundException_klass, java_lang_ClassNotFoundException, Pre ) \ | |
115 do_klass(NoClassDefFoundError_klass, java_lang_NoClassDefFoundError, Pre ) \ | |
116 do_klass(LinkageError_klass, java_lang_LinkageError, Pre ) \ | |
117 do_klass(ClassCastException_klass, java_lang_ClassCastException, Pre ) \ | |
118 do_klass(ArrayStoreException_klass, java_lang_ArrayStoreException, Pre ) \ | |
119 do_klass(VirtualMachineError_klass, java_lang_VirtualMachineError, Pre ) \ | |
120 do_klass(OutOfMemoryError_klass, java_lang_OutOfMemoryError, Pre ) \ | |
121 do_klass(StackOverflowError_klass, java_lang_StackOverflowError, Pre ) \ | |
122 do_klass(IllegalMonitorStateException_klass, java_lang_IllegalMonitorStateException, Pre ) \ | |
123 do_klass(Reference_klass, java_lang_ref_Reference, Pre ) \ | |
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124 \ |
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125 /* Preload ref klasses and set reference types */ \ |
6852 | 126 do_klass(SoftReference_klass, java_lang_ref_SoftReference, Pre ) \ |
127 do_klass(WeakReference_klass, java_lang_ref_WeakReference, Pre ) \ | |
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128 do_klass(FinalReference_klass, java_lang_ref_FinalReference, Pre ) \ |
6852 | 129 do_klass(PhantomReference_klass, java_lang_ref_PhantomReference, Pre ) \ |
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130 do_klass(Finalizer_klass, java_lang_ref_Finalizer, Pre ) \ |
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131 \ |
6852 | 132 do_klass(Thread_klass, java_lang_Thread, Pre ) \ |
133 do_klass(ThreadGroup_klass, java_lang_ThreadGroup, Pre ) \ | |
134 do_klass(Properties_klass, java_util_Properties, Pre ) \ | |
135 do_klass(reflect_AccessibleObject_klass, java_lang_reflect_AccessibleObject, Pre ) \ | |
136 do_klass(reflect_Field_klass, java_lang_reflect_Field, Pre ) \ | |
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137 do_klass(reflect_Parameter_klass, java_lang_reflect_Parameter, Opt ) \ |
6852 | 138 do_klass(reflect_Method_klass, java_lang_reflect_Method, Pre ) \ |
139 do_klass(reflect_Constructor_klass, java_lang_reflect_Constructor, Pre ) \ | |
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140 \ |
3938 | 141 /* NOTE: needed too early in bootstrapping process to have checks based on JDK version */ \ |
142 /* Universe::is_gte_jdk14x_version() is not set up by this point. */ \ | |
143 /* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \ | |
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144 do_klass(reflect_MagicAccessorImpl_klass, sun_reflect_MagicAccessorImpl, Opt ) \ |
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145 do_klass(reflect_MethodAccessorImpl_klass, sun_reflect_MethodAccessorImpl, Opt_Only_JDK14NewRef) \ |
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146 do_klass(reflect_ConstructorAccessorImpl_klass, sun_reflect_ConstructorAccessorImpl, Opt_Only_JDK14NewRef) \ |
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147 do_klass(reflect_DelegatingClassLoader_klass, sun_reflect_DelegatingClassLoader, Opt ) \ |
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148 do_klass(reflect_ConstantPool_klass, sun_reflect_ConstantPool, Opt_Only_JDK15 ) \ |
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149 do_klass(reflect_UnsafeStaticFieldAccessorImpl_klass, sun_reflect_UnsafeStaticFieldAccessorImpl, Opt_Only_JDK15 ) \ |
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150 do_klass(reflect_CallerSensitive_klass, sun_reflect_CallerSensitive, Opt ) \ |
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151 \ |
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152 /* support for dynamic typing; it's OK if these are NULL in earlier JDKs */ \ |
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153 do_klass(DirectMethodHandle_klass, java_lang_invoke_DirectMethodHandle, Opt ) \ |
6852 | 154 do_klass(MethodHandle_klass, java_lang_invoke_MethodHandle, Pre_JSR292 ) \ |
155 do_klass(MemberName_klass, java_lang_invoke_MemberName, Pre_JSR292 ) \ | |
156 do_klass(MethodHandleNatives_klass, java_lang_invoke_MethodHandleNatives, Pre_JSR292 ) \ | |
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157 do_klass(LambdaForm_klass, java_lang_invoke_LambdaForm, Opt ) \ |
6852 | 158 do_klass(MethodType_klass, java_lang_invoke_MethodType, Pre_JSR292 ) \ |
159 do_klass(BootstrapMethodError_klass, java_lang_BootstrapMethodError, Pre_JSR292 ) \ | |
160 do_klass(CallSite_klass, java_lang_invoke_CallSite, Pre_JSR292 ) \ | |
161 do_klass(ConstantCallSite_klass, java_lang_invoke_ConstantCallSite, Pre_JSR292 ) \ | |
162 do_klass(MutableCallSite_klass, java_lang_invoke_MutableCallSite, Pre_JSR292 ) \ | |
163 do_klass(VolatileCallSite_klass, java_lang_invoke_VolatileCallSite, Pre_JSR292 ) \ | |
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164 /* Note: MethodHandle must be first, and VolatileCallSite last in group */ \ |
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165 \ |
6852 | 166 do_klass(StringBuffer_klass, java_lang_StringBuffer, Pre ) \ |
167 do_klass(StringBuilder_klass, java_lang_StringBuilder, Pre ) \ | |
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168 do_klass(misc_Unsafe_klass, sun_misc_Unsafe, Pre ) \ |
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169 \ |
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170 /* It's NULL in non-1.4 JDKs. */ \ |
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171 do_klass(StackTraceElement_klass, java_lang_StackTraceElement, Opt ) \ |
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172 /* Universe::is_gte_jdk14x_version() is not set up by this point. */ \ |
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173 /* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \ |
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174 do_klass(nio_Buffer_klass, java_nio_Buffer, Opt ) \ |
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175 \ |
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176 /* Preload boxing klasses */ \ |
6852 | 177 do_klass(Boolean_klass, java_lang_Boolean, Pre ) \ |
178 do_klass(Character_klass, java_lang_Character, Pre ) \ | |
179 do_klass(Float_klass, java_lang_Float, Pre ) \ | |
180 do_klass(Double_klass, java_lang_Double, Pre ) \ | |
181 do_klass(Byte_klass, java_lang_Byte, Pre ) \ | |
182 do_klass(Short_klass, java_lang_Short, Pre ) \ | |
183 do_klass(Integer_klass, java_lang_Integer, Pre ) \ | |
184 do_klass(Long_klass, java_lang_Long, Pre ) \ | |
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185 \ |
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186 /* Support for Graal */ \ |
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187 do_klass(BitSet_klass, java_util_BitSet, Opt ) \ |
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188 /* Graal classes */ \ |
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189 GRAAL_ONLY(do_klass(CompilerThread_klass, com_oracle_graal_compiler_CompilerThread, Graal)) \ |
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190 GRAAL_ONLY(do_klass(Node_klass, com_oracle_graal_graph_Node, Graal)) \ |
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191 GRAAL_ONLY(do_klass(NodeClass_klass, com_oracle_graal_graph_NodeClass, Graal)) \ |
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192 GRAAL_ONLY(do_klass(HotSpotCompiledCode_klass, com_oracle_graal_hotspot_HotSpotCompiledCode, Graal)) \ |
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193 GRAAL_ONLY(do_klass(HotSpotCompiledCode_Comment_klass, com_oracle_graal_hotspot_HotSpotCompiledCode_Comment, Graal)) \ |
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194 GRAAL_ONLY(do_klass(HotSpotCompiledNmethod_klass, com_oracle_graal_hotspot_HotSpotCompiledNmethod, Graal)) \ |
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195 GRAAL_ONLY(do_klass(HotSpotCompiledRuntimeStub_klass, com_oracle_graal_hotspot_HotSpotCompiledRuntimeStub, Graal)) \ |
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196 GRAAL_ONLY(do_klass(HotSpotForeignCallLinkageImpl_klass, com_oracle_graal_hotspot_HotSpotForeignCallLinkageImpl, Graal)) \ |
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197 GRAAL_ONLY(do_klass(HotSpotReferenceMap_klass, com_oracle_graal_hotspot_HotSpotReferenceMap, Graal)) \ |
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198 GRAAL_ONLY(do_klass(HotSpotInstalledCode_klass, com_oracle_graal_hotspot_meta_HotSpotInstalledCode, Graal)) \ |
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199 GRAAL_ONLY(do_klass(HotSpotNmethod_klass, com_oracle_graal_hotspot_meta_HotSpotNmethod, Graal)) \ |
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200 GRAAL_ONLY(do_klass(HotSpotResolvedJavaMethodImpl_klass, com_oracle_graal_hotspot_meta_HotSpotResolvedJavaMethodImpl, Graal)) \ |
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201 GRAAL_ONLY(do_klass(HotSpotResolvedObjectTypeImpl_klass, com_oracle_graal_hotspot_meta_HotSpotResolvedObjectTypeImpl, Graal)) \ |
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202 GRAAL_ONLY(do_klass(HotSpotMonitorValue_klass, com_oracle_graal_hotspot_meta_HotSpotMonitorValue, Graal)) \ |
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203 GRAAL_ONLY(do_klass(HotSpotCompressedNullConstant_klass, com_oracle_graal_hotspot_meta_HotSpotCompressedNullConstant, Graal)) \ |
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204 GRAAL_ONLY(do_klass(HotSpotObjectConstantImpl_klass, com_oracle_graal_hotspot_meta_HotSpotObjectConstantImpl, Graal)) \ |
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205 GRAAL_ONLY(do_klass(HotSpotMetaspaceConstantImpl_klass, com_oracle_graal_hotspot_meta_HotSpotMetaspaceConstantImpl, Graal)) \ |
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206 GRAAL_ONLY(do_klass(HotSpotStackFrameReference_klass, com_oracle_graal_hotspot_HotSpotStackFrameReference, Graal)) \ |
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207 GRAAL_ONLY(do_klass(CompilationTask_klass, com_oracle_graal_hotspot_CompilationTask, Graal)) \ |
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208 GRAAL_ONLY(do_klass(Assumptions_klass, com_oracle_graal_api_code_Assumptions, Graal)) \ |
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209 GRAAL_ONLY(do_klass(Assumptions_ConcreteMethod_klass, com_oracle_graal_api_code_Assumptions_ConcreteMethod, Graal)) \ |
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210 GRAAL_ONLY(do_klass(Assumptions_NoFinalizableSubclass_klass, com_oracle_graal_api_code_Assumptions_NoFinalizableSubclass, Graal))\ |
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211 GRAAL_ONLY(do_klass(Assumptions_ConcreteSubtype_klass, com_oracle_graal_api_code_Assumptions_ConcreteSubtype, Graal)) \ |
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212 GRAAL_ONLY(do_klass(Assumptions_MethodContents_klass, com_oracle_graal_api_code_Assumptions_MethodContents, Graal)) \ |
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213 GRAAL_ONLY(do_klass(Assumptions_CallSiteTargetValue_klass, com_oracle_graal_api_code_Assumptions_CallSiteTargetValue, Graal)) \ |
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214 GRAAL_ONLY(do_klass(BytecodePosition_klass, com_oracle_graal_api_code_BytecodePosition, Graal)) \ |
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215 GRAAL_ONLY(do_klass(DebugInfo_klass, com_oracle_graal_api_code_DebugInfo, Graal)) \ |
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216 GRAAL_ONLY(do_klass(RegisterSaveLayout_klass, com_oracle_graal_api_code_RegisterSaveLayout, Graal)) \ |
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217 GRAAL_ONLY(do_klass(BytecodeFrame_klass, com_oracle_graal_api_code_BytecodeFrame, Graal)) \ |
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218 GRAAL_ONLY(do_klass(CompilationResult_klass, com_oracle_graal_api_code_CompilationResult, Graal)) \ |
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219 GRAAL_ONLY(do_klass(CompilationResult_Call_klass, com_oracle_graal_api_code_CompilationResult_Call, Graal)) \ |
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220 GRAAL_ONLY(do_klass(CompilationResult_ConstantReference_klass, com_oracle_graal_api_code_CompilationResult_ConstantReference, Graal)) \ |
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221 GRAAL_ONLY(do_klass(CompilationResult_DataPatch_klass, com_oracle_graal_api_code_CompilationResult_DataPatch, Graal)) \ |
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222 GRAAL_ONLY(do_klass(CompilationResult_DataSectionReference_klass, com_oracle_graal_api_code_CompilationResult_DataSectionReference, Graal)) \ |
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223 GRAAL_ONLY(do_klass(CompilationResult_ExceptionHandler_klass, com_oracle_graal_api_code_CompilationResult_ExceptionHandler, Graal))\ |
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224 GRAAL_ONLY(do_klass(CompilationResult_Mark_klass, com_oracle_graal_api_code_CompilationResult_Mark, Graal)) \ |
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225 GRAAL_ONLY(do_klass(CompilationResult_Infopoint_klass, com_oracle_graal_api_code_CompilationResult_Infopoint, Graal)) \ |
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226 GRAAL_ONLY(do_klass(CompilationResult_Site_klass, com_oracle_graal_api_code_CompilationResult_Site, Graal)) \ |
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227 GRAAL_ONLY(do_klass(ExternalCompilationResult_klass, com_oracle_graal_gpu_ExternalCompilationResult, Graal)) \ |
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228 GRAAL_ONLY(do_klass(InfopointReason_klass, com_oracle_graal_api_code_InfopointReason, Graal)) \ |
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229 GRAAL_ONLY(do_klass(InstalledCode_klass, com_oracle_graal_api_code_InstalledCode, Graal)) \ |
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230 GRAAL_ONLY(do_klass(code_Register_klass, com_oracle_graal_api_code_Register, Graal)) \ |
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231 GRAAL_ONLY(do_klass(RegisterValue_klass, com_oracle_graal_api_code_RegisterValue, Graal)) \ |
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232 GRAAL_ONLY(do_klass(RegisterCategory_klass, com_oracle_graal_api_code_Register_RegisterCategory, Graal)) \ |
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233 GRAAL_ONLY(do_klass(StackSlot_klass, com_oracle_graal_api_code_StackSlot, Graal)) \ |
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234 GRAAL_ONLY(do_klass(VirtualObject_klass, com_oracle_graal_api_code_VirtualObject, Graal)) \ |
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235 GRAAL_ONLY(do_klass(SpeculationLog_klass, com_oracle_graal_api_code_SpeculationLog, Graal)) \ |
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236 GRAAL_ONLY(do_klass(JavaConstant_klass, com_oracle_graal_api_meta_JavaConstant, Graal)) \ |
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237 GRAAL_ONLY(do_klass(PrimitiveConstant_klass, com_oracle_graal_api_meta_PrimitiveConstant, Graal)) \ |
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238 GRAAL_ONLY(do_klass(RawConstant_klass, com_oracle_graal_api_meta_RawConstant, Graal)) \ |
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239 GRAAL_ONLY(do_klass(NullConstant_klass, com_oracle_graal_api_meta_NullConstant, Graal)) \ |
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240 GRAAL_ONLY(do_klass(ExceptionHandler_klass, com_oracle_graal_api_meta_ExceptionHandler, Graal)) \ |
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241 GRAAL_ONLY(do_klass(Kind_klass, com_oracle_graal_api_meta_Kind, Graal)) \ |
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242 GRAAL_ONLY(do_klass(LIRKind_klass, com_oracle_graal_api_meta_LIRKind, Graal)) \ |
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243 GRAAL_ONLY(do_klass(JavaMethod_klass, com_oracle_graal_api_meta_JavaMethod, Graal)) \ |
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244 GRAAL_ONLY(do_klass(JavaType_klass, com_oracle_graal_api_meta_JavaType, Graal)) \ |
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245 GRAAL_ONLY(do_klass(AbstractValue_klass, com_oracle_graal_api_meta_AbstractValue, Graal)) \ |
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246 |
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247 /*end*/ |
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248 |
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249 |
0 | 250 class SystemDictionary : AllStatic { |
251 friend class VMStructs; | |
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252 friend class SystemDictionaryHandles; |
0 | 253 |
254 public: | |
132
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255 enum WKID { |
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256 NO_WKID = 0, |
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257 |
3938 | 258 #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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259 WK_KLASSES_DO(WK_KLASS_ENUM) |
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260 #undef WK_KLASS_ENUM |
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261 |
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262 WKID_LIMIT, |
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263 |
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264 #ifdef GRAAL |
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265 FIRST_GRAAL_WKID = WK_KLASS_ENUM_NAME(CompilerThread_klass), |
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266 LAST_GRAAL_WKID = WK_KLASS_ENUM_NAME(AbstractValue_klass), |
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267 #endif |
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268 |
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269 FIRST_WKID = NO_WKID + 1 |
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270 }; |
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271 |
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272 enum InitOption { |
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273 Pre, // preloaded; error if not present |
6852 | 274 Pre_JSR292, // preloaded if EnableInvokeDynamic |
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275 |
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276 // Order is significant. Options before this point require resolve_or_fail. |
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277 // Options after this point will use resolve_or_null instead. |
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278 |
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279 Opt, // preload tried; NULL if not present |
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280 Opt_Only_JDK14NewRef, // preload tried; use only with NewReflection |
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281 Opt_Only_JDK15, // preload tried; use only with JDK1.5+ |
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282 #ifdef GRAAL |
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283 Graal, // preload tried; error if not present, use only with GRAAL |
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284 #endif |
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285 OPTION_LIMIT, |
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286 CEIL_LG_OPTION_LIMIT = 4 // OPTION_LIMIT <= (1<<CEIL_LG_OPTION_LIMIT) |
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287 }; |
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288 |
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289 |
0 | 290 // Returns a class with a given class name and class loader. Loads the |
291 // class if needed. If not found a NoClassDefFoundError or a | |
292 // ClassNotFoundException is thrown, depending on the value on the | |
293 // throw_error flag. For most uses the throw_error argument should be set | |
294 // to true. | |
295 | |
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296 static Klass* resolve_or_fail(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS); |
0 | 297 // Convenient call for null loader and protection domain. |
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298 static Klass* resolve_or_fail(Symbol* class_name, bool throw_error, TRAPS); |
0 | 299 private: |
300 // handle error translation for resolve_or_null results | |
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301 static Klass* handle_resolution_exception(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, KlassHandle klass_h, TRAPS); |
0 | 302 |
303 public: | |
304 | |
305 // Returns a class with a given class name and class loader. | |
306 // Loads the class if needed. If not found NULL is returned. | |
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307 static Klass* resolve_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
0 | 308 // Version with null loader and protection domain |
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309 static Klass* resolve_or_null(Symbol* class_name, TRAPS); |
0 | 310 |
311 // Resolve a superclass or superinterface. Called from ClassFileParser, | |
312 // parse_interfaces, resolve_instance_class_or_null, load_shared_class | |
313 // "child_name" is the class whose super class or interface is being resolved. | |
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314 static Klass* resolve_super_or_fail(Symbol* child_name, |
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315 Symbol* class_name, |
0 | 316 Handle class_loader, |
317 Handle protection_domain, | |
318 bool is_superclass, | |
319 TRAPS); | |
320 | |
321 // Parse new stream. This won't update the system dictionary or | |
322 // class hierarchy, simply parse the stream. Used by JVMTI RedefineClasses. | |
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323 static Klass* parse_stream(Symbol* class_name, |
0 | 324 Handle class_loader, |
325 Handle protection_domain, | |
326 ClassFileStream* st, | |
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327 TRAPS) { |
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328 KlassHandle nullHandle; |
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329 return parse_stream(class_name, class_loader, protection_domain, st, nullHandle, NULL, THREAD); |
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330 } |
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331 static Klass* parse_stream(Symbol* class_name, |
431
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332 Handle class_loader, |
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333 Handle protection_domain, |
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334 ClassFileStream* st, |
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335 KlassHandle host_klass, |
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336 GrowableArray<Handle>* cp_patches, |
0 | 337 TRAPS); |
338 | |
339 // Resolve from stream (called by jni_DefineClass and JVM_DefineClass) | |
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340 static Klass* resolve_from_stream(Symbol* class_name, Handle class_loader, |
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341 Handle protection_domain, |
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342 ClassFileStream* st, bool verify, TRAPS); |
0 | 343 |
344 // Lookup an already loaded class. If not found NULL is returned. | |
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345 static Klass* find(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
0 | 346 |
347 // Lookup an already loaded instance or array class. | |
348 // Do not make any queries to class loaders; consult only the cache. | |
349 // If not found NULL is returned. | |
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350 static Klass* find_instance_or_array_klass(Symbol* class_name, |
0 | 351 Handle class_loader, |
352 Handle protection_domain, | |
353 TRAPS); | |
354 | |
355 // Lookup an instance or array class that has already been loaded | |
356 // either into the given class loader, or else into another class | |
357 // loader that is constrained (via loader constraints) to produce | |
358 // a consistent class. Do not take protection domains into account. | |
359 // Do not make any queries to class loaders; consult only the cache. | |
360 // Return NULL if the class is not found. | |
361 // | |
362 // This function is a strict superset of find_instance_or_array_klass. | |
363 // This function (the unchecked version) makes a conservative prediction | |
364 // of the result of the checked version, assuming successful lookup. | |
365 // If both functions return non-null, they must return the same value. | |
366 // Also, the unchecked version may sometimes be non-null where the | |
367 // checked version is null. This can occur in several ways: | |
368 // 1. No query has yet been made to the class loader. | |
369 // 2. The class loader was queried, but chose not to delegate. | |
370 // 3. ClassLoader.checkPackageAccess rejected a proposed protection domain. | |
371 // 4. Loading was attempted, but there was a linkage error of some sort. | |
372 // In all of these cases, the loader constraints on this type are | |
373 // satisfied, and it is safe for classes in the given class loader | |
374 // to manipulate strongly-typed values of the found class, subject | |
375 // to local linkage and access checks. | |
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376 static Klass* find_constrained_instance_or_array_klass(Symbol* class_name, |
0 | 377 Handle class_loader, |
378 TRAPS); | |
379 | |
380 // Iterate over all klasses in dictionary | |
381 // Just the classes from defining class loaders | |
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382 static void classes_do(void f(Klass*)); |
0 | 383 // Added for initialize_itable_for_klass to handle exceptions |
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384 static void classes_do(void f(Klass*, TRAPS), TRAPS); |
0 | 385 // All classes, and their class loaders |
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386 static void classes_do(void f(Klass*, ClassLoaderData*)); |
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387 |
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388 static void placeholders_do(void f(Symbol*)); |
0 | 389 |
390 // Iterate over all methods in all klasses in dictionary | |
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391 static void methods_do(void f(Method*)); |
0 | 392 |
393 // Garbage collection support | |
394 | |
395 // This method applies "blk->do_oop" to all the pointers to "system" | |
396 // classes and loaders. | |
397 static void always_strong_oops_do(OopClosure* blk); | |
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398 static void always_strong_classes_do(KlassClosure* closure); |
0 | 399 |
400 // Unload (that is, break root links to) all unmarked classes and | |
401 // loaders. Returns "true" iff something was unloaded. | |
402 static bool do_unloading(BoolObjectClosure* is_alive); | |
403 | |
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404 static int calculate_systemdictionary_size(int loadedclasses); |
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405 |
0 | 406 // Applies "f->do_oop" to all root oops in the system dictionary. |
407 static void oops_do(OopClosure* f); | |
408 | |
409 // System loader lock | |
410 static oop system_loader_lock() { return _system_loader_lock_obj; } | |
411 | |
412 private: | |
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413 // Extended Redefine classes support (tbi) |
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414 static void preloaded_classes_do(KlassClosure* f); |
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415 static void lazily_loaded_classes_do(KlassClosure* f); |
0 | 416 public: |
417 // Sharing support. | |
418 static void reorder_dictionary(); | |
419 static void copy_buckets(char** top, char* end); | |
420 static void copy_table(char** top, char* end); | |
421 static void reverse(); | |
6197 | 422 static void set_shared_dictionary(HashtableBucket<mtClass>* t, int length, |
0 | 423 int number_of_entries); |
424 // Printing | |
425 static void print() PRODUCT_RETURN; | |
426 static void print_class_statistics() PRODUCT_RETURN; | |
427 static void print_method_statistics() PRODUCT_RETURN; | |
428 | |
429 // Number of contained klasses | |
430 // This is both fully loaded classes and classes in the process | |
431 // of being loaded | |
432 static int number_of_classes(); | |
433 | |
434 // Monotonically increasing counter which grows as classes are | |
435 // loaded or modifications such as hot-swapping or setting/removing | |
436 // of breakpoints are performed | |
437 static inline int number_of_modifications() { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; } | |
438 // Needed by evolution and breakpoint code | |
439 static inline void notice_modification() { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications; } | |
440 | |
441 // Verification | |
442 static void verify(); | |
443 | |
444 #ifdef ASSERT | |
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445 static bool is_internal_format(Symbol* class_name); |
0 | 446 #endif |
447 | |
448 // Initialization | |
449 static void initialize(TRAPS); | |
450 | |
451 // Fast access to commonly used classes (preloaded) | |
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452 static Klass* check_klass(Klass* k) { |
0 | 453 assert(k != NULL, "preloaded klass not initialized"); |
454 return k; | |
455 } | |
456 | |
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457 static Klass* check_klass_Pre( Klass* k) { return check_klass(k); } |
6852 | 458 static Klass* check_klass_Pre_JSR292(Klass* k) { return EnableInvokeDynamic ? check_klass(k) : k; } |
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459 static Klass* check_klass_Opt( Klass* k) { return k; } |
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460 static Klass* check_klass_Opt_Only_JDK15(Klass* k) { |
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461 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only"); |
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462 return k; |
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463 } |
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464 static Klass* check_klass_Opt_Only_JDK14NewRef(Klass* k) { |
0 | 465 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only"); |
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466 // despite the optional loading, if you use this it must be present: |
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467 return check_klass(k); |
0 | 468 } |
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469 #ifdef GRAAL |
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470 static Klass* check_klass_Graal(Klass* k) { return k; } |
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471 #endif |
0 | 472 |
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473 static bool initialize_wk_klass(WKID id, int init_opt, TRAPS); |
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474 static void initialize_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS); |
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475 static void initialize_wk_klasses_through(WKID end_id, WKID &start_id, TRAPS) { |
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476 int limit = (int)end_id + 1; |
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477 initialize_wk_klasses_until((WKID) limit, start_id, THREAD); |
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478 } |
0 | 479 |
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480 public: |
3938 | 481 #define WK_KLASS_DECLARE(name, symbol, option) \ |
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482 static Klass* name() { return check_klass_##option(_well_known_klasses[WK_KLASS_ENUM_NAME(name)]); } \ |
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483 static Klass** name##_addr() { \ |
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484 return &SystemDictionary::_well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)]; \ |
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485 } |
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486 WK_KLASSES_DO(WK_KLASS_DECLARE); |
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487 #undef WK_KLASS_DECLARE |
0 | 488 |
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489 static Klass* well_known_klass(WKID id) { |
3938 | 490 assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob"); |
491 return _well_known_klasses[id]; | |
492 } | |
493 | |
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494 static Klass** well_known_klass_addr(WKID id) { |
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495 assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob"); |
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496 return &_well_known_klasses[id]; |
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497 } |
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498 |
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499 // Local definition for direct access to the private array: |
147 | 500 #define WK_KLASS(name) _well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)] |
0 | 501 |
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502 static Klass* box_klass(BasicType t) { |
0 | 503 assert((uint)t < T_VOID+1, "range check"); |
504 return check_klass(_box_klasses[t]); | |
505 } | |
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506 static BasicType box_klass_type(Klass* k); // inverse of box_klass |
0 | 507 |
508 // methods returning lazily loaded klasses | |
509 // The corresponding method to load the class must be called before calling them. | |
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510 static Klass* abstract_ownable_synchronizer_klass() { return check_klass(_abstract_ownable_synchronizer_klass); } |
0 | 511 |
512 static void load_abstract_ownable_synchronizer_klass(TRAPS); | |
513 | |
514 private: | |
515 // Tells whether ClassLoader.loadClassInternal is present | |
516 static bool has_loadClassInternal() { return _has_loadClassInternal; } | |
517 | |
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518 // Returns the class loader data to be used when looking up/updating the |
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519 // system dictionary. |
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520 static ClassLoaderData *class_loader_data(Handle class_loader) { |
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521 return ClassLoaderData::class_loader_data(class_loader()); |
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522 } |
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523 |
0 | 524 public: |
525 // Tells whether ClassLoader.checkPackageAccess is present | |
526 static bool has_checkPackageAccess() { return _has_checkPackageAccess; } | |
527 | |
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528 static bool Parameter_klass_loaded() { return WK_KLASS(reflect_Parameter_klass) != NULL; } |
1142 | 529 static bool Class_klass_loaded() { return WK_KLASS(Class_klass) != NULL; } |
530 static bool Cloneable_klass_loaded() { return WK_KLASS(Cloneable_klass) != NULL; } | |
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531 static bool Object_klass_loaded() { return WK_KLASS(Object_klass) != NULL; } |
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532 static bool ClassLoader_klass_loaded() { return WK_KLASS(ClassLoader_klass) != NULL; } |
0 | 533 |
534 // Returns default system loader | |
535 static oop java_system_loader(); | |
536 | |
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537 #ifdef GRAAL |
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538 // Returns the Graal loader. This will be NULL if !UseGraalClassLoader |
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539 // in which case it's equivalent to the boot loader |
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540 static oop graal_loader(); |
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541 #endif |
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542 |
0 | 543 // Compute the default system loader |
544 static void compute_java_system_loader(TRAPS); | |
545 | |
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546 // Register a new class loader |
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547 static ClassLoaderData* register_loader(Handle class_loader, TRAPS); |
0 | 548 private: |
549 // Mirrors for primitive classes (created eagerly) | |
550 static oop check_mirror(oop m) { | |
551 assert(m != NULL, "mirror not initialized"); | |
552 return m; | |
553 } | |
554 | |
555 public: | |
556 // Note: java_lang_Class::primitive_type is the inverse of java_mirror | |
557 | |
558 // Check class loader constraints | |
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559 static bool add_loader_constraint(Symbol* name, Handle loader1, |
0 | 560 Handle loader2, TRAPS); |
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561 static Symbol* check_signature_loaders(Symbol* signature, Handle loader1, |
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562 Handle loader2, bool is_method, TRAPS); |
0 | 563 |
710 | 564 // JSR 292 |
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565 // find a java.lang.invoke.MethodHandle.invoke* method for a given signature |
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566 // (asks Java to compute it if necessary, except in a compiler thread) |
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567 static methodHandle find_method_handle_invoker(Symbol* name, |
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568 Symbol* signature, |
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569 KlassHandle accessing_klass, |
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570 Handle *appendix_result, |
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571 Handle *method_type_result, |
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572 TRAPS); |
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573 // for a given signature, find the internal MethodHandle method (linkTo* or invokeBasic) |
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574 // (does not ask Java, since this is a low-level intrinsic defined by the JVM) |
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575 static methodHandle find_method_handle_intrinsic(vmIntrinsics::ID iid, |
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576 Symbol* signature, |
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577 TRAPS); |
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578 // find a java.lang.invoke.MethodType object for a given signature |
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579 // (asks Java to compute it if necessary, except in a compiler thread) |
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580 static Handle find_method_handle_type(Symbol* signature, |
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581 KlassHandle accessing_klass, |
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582 TRAPS); |
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583 |
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584 // ask Java to compute a java.lang.invoke.MethodHandle object for a given CP entry |
1602 | 585 static Handle link_method_handle_constant(KlassHandle caller, |
586 int ref_kind, //e.g., JVM_REF_invokeVirtual | |
587 KlassHandle callee, | |
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588 Symbol* name, |
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589 Symbol* signature, |
1602 | 590 TRAPS); |
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591 |
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592 // ask Java to create a dynamic call site, while linking an invokedynamic op |
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593 static methodHandle find_dynamic_call_site_invoker(KlassHandle caller, |
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594 Handle bootstrap_method, |
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595 Symbol* name, |
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596 Symbol* type, |
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597 Handle *appendix_result, |
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598 Handle *method_type_result, |
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599 TRAPS); |
726
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600 |
0 | 601 // Utility for printing loader "name" as part of tracing constraints |
602 static const char* loader_name(oop loader) { | |
603 return ((loader) == NULL ? "<bootloader>" : | |
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604 InstanceKlass::cast((loader)->klass())->name()->as_C_string() ); |
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605 } |
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606 static const char* loader_name(ClassLoaderData* loader_data) { |
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607 return (loader_data->class_loader() == NULL ? "<bootloader>" : |
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608 InstanceKlass::cast((loader_data->class_loader())->klass())->name()->as_C_string() ); |
0 | 609 } |
610 | |
611 // Record the error when the first attempt to resolve a reference from a constant | |
612 // pool entry to a class fails. | |
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613 static void add_resolution_error(constantPoolHandle pool, int which, Symbol* error); |
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614 static void delete_resolution_error(ConstantPool* pool); |
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615 static Symbol* find_resolution_error(constantPoolHandle pool, int which); |
0 | 616 |
617 private: | |
618 | |
619 enum Constants { | |
620 _loader_constraint_size = 107, // number of entries in constraint table | |
621 _resolution_error_size = 107, // number of entries in resolution error table | |
710 | 622 _invoke_method_size = 139, // number of entries in invoke method table |
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623 _nof_buckets = 1009, // number of buckets in hash table for placeholders |
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624 _old_default_sdsize = 1009, // backward compat for system dictionary size |
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625 _prime_array_size = 8, // array of primes for system dictionary size |
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626 _average_depth_goal = 3 // goal for lookup length |
0 | 627 }; |
628 | |
629 | |
630 // Static variables | |
631 | |
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632 // hashtable sizes for system dictionary to allow growth |
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633 // prime numbers for system dictionary size |
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634 static int _sdgeneration; |
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635 static const int _primelist[_prime_array_size]; |
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636 |
0 | 637 // Hashtable holding loaded classes. |
638 static Dictionary* _dictionary; | |
639 | |
640 // Hashtable holding placeholders for classes being loaded. | |
641 static PlaceholderTable* _placeholders; | |
642 | |
643 // Hashtable holding classes from the shared archive. | |
644 static Dictionary* _shared_dictionary; | |
645 | |
646 // Monotonically increasing counter which grows with | |
647 // _number_of_classes as well as hot-swapping and breakpoint setting | |
648 // and removal. | |
649 static int _number_of_modifications; | |
650 | |
651 // Lock object for system class loader | |
652 static oop _system_loader_lock_obj; | |
653 | |
654 // Constraints on class loaders | |
655 static LoaderConstraintTable* _loader_constraints; | |
656 | |
657 // Resolution errors | |
658 static ResolutionErrorTable* _resolution_errors; | |
659 | |
710 | 660 // Invoke methods (JSR 292) |
661 static SymbolPropertyTable* _invoke_method_table; | |
662 | |
0 | 663 public: |
664 // for VM_CounterDecay iteration support | |
665 friend class CounterDecay; | |
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666 static Klass* try_get_next_class(); |
0 | 667 |
668 private: | |
669 static void validate_protection_domain(instanceKlassHandle klass, | |
670 Handle class_loader, | |
671 Handle protection_domain, TRAPS); | |
672 | |
673 friend class VM_PopulateDumpSharedSpace; | |
674 friend class TraversePlaceholdersClosure; | |
675 static Dictionary* dictionary() { return _dictionary; } | |
676 static Dictionary* shared_dictionary() { return _shared_dictionary; } | |
677 static PlaceholderTable* placeholders() { return _placeholders; } | |
678 static LoaderConstraintTable* constraints() { return _loader_constraints; } | |
679 static ResolutionErrorTable* resolution_errors() { return _resolution_errors; } | |
710 | 680 static SymbolPropertyTable* invoke_method_table() { return _invoke_method_table; } |
0 | 681 |
682 // Basic loading operations | |
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683 static Klass* resolve_instance_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
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684 static Klass* resolve_array_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
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685 static instanceKlassHandle handle_parallel_super_load(Symbol* class_name, Symbol* supername, Handle class_loader, Handle protection_domain, Handle lockObject, TRAPS); |
0 | 686 // Wait on SystemDictionary_lock; unlocks lockObject before |
687 // waiting; relocks lockObject with correct recursion count | |
688 // after waiting, but before reentering SystemDictionary_lock | |
689 // to preserve lock order semantics. | |
690 static void double_lock_wait(Handle lockObject, TRAPS); | |
691 static void define_instance_class(instanceKlassHandle k, TRAPS); | |
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692 static instanceKlassHandle find_or_define_instance_class(Symbol* class_name, |
0 | 693 Handle class_loader, |
694 instanceKlassHandle k, TRAPS); | |
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695 static instanceKlassHandle load_shared_class(Symbol* class_name, |
0 | 696 Handle class_loader, TRAPS); |
697 static instanceKlassHandle load_shared_class(instanceKlassHandle ik, | |
698 Handle class_loader, TRAPS); | |
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699 static instanceKlassHandle load_instance_class(Symbol* class_name, Handle class_loader, TRAPS); |
0 | 700 static Handle compute_loader_lock_object(Handle class_loader, TRAPS); |
701 static void check_loader_lock_contention(Handle loader_lock, TRAPS); | |
514 | 702 static bool is_parallelCapable(Handle class_loader); |
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703 static bool is_parallelDefine(Handle class_loader); |
0 | 704 |
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705 public: |
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706 static bool is_ext_class_loader(Handle class_loader); |
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707 |
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708 #ifdef GRAAL |
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709 static void initialize_preloaded_graal_classes(TRAPS); |
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710 #endif |
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711 |
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712 private: |
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713 static Klass* find_shared_class(Symbol* class_name); |
0 | 714 |
715 // Setup link to hierarchy | |
716 static void add_to_hierarchy(instanceKlassHandle k, TRAPS); | |
717 | |
10405 | 718 // event based tracing |
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719 static void post_class_load_event(const Ticks& start_time, instanceKlassHandle k, |
10405 | 720 Handle initiating_loader); |
0 | 721 // We pass in the hashtable index so we can calculate it outside of |
722 // the SystemDictionary_lock. | |
723 | |
724 // Basic find on loaded classes | |
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725 static Klass* find_class(int index, unsigned int hash, |
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726 Symbol* name, ClassLoaderData* loader_data); |
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727 static Klass* find_class(Symbol* class_name, ClassLoaderData* loader_data); |
0 | 728 |
729 // Basic find on classes in the midst of being loaded | |
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730 static Symbol* find_placeholder(Symbol* name, ClassLoaderData* loader_data); |
0 | 731 |
732 // Updating entry in dictionary | |
733 // Add a completely loaded class | |
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734 static void add_klass(int index, Symbol* class_name, |
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735 ClassLoaderData* loader_data, KlassHandle obj); |
0 | 736 |
737 // Add a placeholder for a class being loaded | |
738 static void add_placeholder(int index, | |
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739 Symbol* class_name, |
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740 ClassLoaderData* loader_data); |
0 | 741 static void remove_placeholder(int index, |
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742 Symbol* class_name, |
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743 ClassLoaderData* loader_data); |
0 | 744 |
745 // Performs cleanups after resolve_super_or_fail. This typically needs | |
746 // to be called on failure. | |
747 // Won't throw, but can block. | |
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748 static void resolution_cleanups(Symbol* class_name, |
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749 ClassLoaderData* loader_data, |
0 | 750 TRAPS); |
751 | |
752 // Initialization | |
753 static void initialize_preloaded_classes(TRAPS); | |
754 | |
755 // Class loader constraints | |
756 static void check_constraints(int index, unsigned int hash, | |
757 instanceKlassHandle k, Handle loader, | |
758 bool defining, TRAPS); | |
759 static void update_dictionary(int d_index, unsigned int d_hash, | |
760 int p_index, unsigned int p_hash, | |
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761 instanceKlassHandle k, Handle loader, |
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762 TRAPS); |
0 | 763 |
764 // Variables holding commonly used klasses (preloaded) | |
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765 static Klass* _well_known_klasses[]; |
0 | 766 |
767 // Lazily loaded klasses | |
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768 static Klass* volatile _abstract_ownable_synchronizer_klass; |
0 | 769 |
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770 // table of box klasses (int_klass, etc.) |
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771 static Klass* _box_klasses[T_VOID+1]; |
0 | 772 |
773 static oop _java_system_loader; | |
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774 #ifdef GRAAL |
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775 static oop _graal_loader; |
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776 #endif |
0 | 777 |
778 static bool _has_loadClassInternal; | |
779 static bool _has_checkPackageAccess; | |
780 }; | |
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781 |
1972 | 782 #endif // SHARE_VM_CLASSFILE_SYSTEMDICTIONARY_HPP |