Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/systemDictionary.hpp @ 10408:836a62f43af9
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Wed, 19 Jun 2013 10:45:56 +0200 |
| parents | d552919fbb05 f2110083203d |
| children | 9c7d9e2c8326 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 7951 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #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" | |
| 10405 | 34 #include "trace/traceTime.hpp" |
| 1972 | 35 #include "utilities/hashtable.hpp" |
| 6197 | 36 #include "utilities/hashtable.inline.hpp" |
| 1972 | 37 |
| 10405 | 38 |
| 0 | 39 // The system dictionary stores all loaded classes and maps: |
| 40 // | |
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41 // [class name,class loader] -> class i.e. [Symbol*,oop] -> Klass* |
| 0 | 42 // |
| 43 // Classes are loaded lazily. The default VM class loader is | |
| 44 // represented as NULL. | |
| 45 | |
| 46 // The underlying data structure is an open hash table with a fixed number | |
| 47 // of buckets. During loading the loader object is locked, (for the VM loader | |
| 48 // a private lock object is used). Class loading can thus be done concurrently, | |
| 49 // but only by different loaders. | |
| 50 // | |
| 51 // During loading a placeholder (name, loader) is temporarily placed in | |
| 52 // a side data structure, and is used to detect ClassCircularityErrors | |
| 53 // and to perform verification during GC. A GC can occur in the midst | |
| 54 // of class loading, as we call out to Java, have to take locks, etc. | |
| 55 // | |
| 56 // When class loading is finished, a new entry is added to the system | |
| 57 // dictionary and the place holder is removed. Note that the protection | |
| 58 // domain field of the system dictionary has not yet been filled in when | |
| 59 // the "real" system dictionary entry is created. | |
| 60 // | |
| 61 // Clients of this class who are interested in finding if a class has | |
| 62 // been completely loaded -- not classes in the process of being loaded -- | |
| 63 // can read the SystemDictionary unlocked. This is safe because | |
| 64 // - entries are only deleted at safepoints | |
| 65 // - readers cannot come to a safepoint while actively examining | |
| 66 // an entry (an entry cannot be deleted from under a reader) | |
| 67 // - entries must be fully formed before they are available to concurrent | |
| 68 // readers (we must ensure write ordering) | |
| 69 // | |
| 70 // Note that placeholders are deleted at any time, as they are removed | |
| 71 // when a class is completely loaded. Therefore, readers as well as writers | |
| 72 // of placeholders must hold the SystemDictionary_lock. | |
| 73 // | |
| 74 | |
| 75 class Dictionary; | |
| 76 class PlaceholderTable; | |
| 77 class LoaderConstraintTable; | |
| 6197 | 78 template <MEMFLAGS F> class HashtableBucket; |
| 0 | 79 class ResolutionErrorTable; |
| 710 | 80 class SymbolPropertyTable; |
| 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(lambda_MagicLambdaImpl_klass, java_lang_invoke_MagicLambdaImpl, Opt ) \ |
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145 do_klass(reflect_MagicAccessorImpl_klass, sun_reflect_MagicAccessorImpl, Opt ) \ |
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146 do_klass(reflect_MethodAccessorImpl_klass, sun_reflect_MethodAccessorImpl, Opt_Only_JDK14NewRef) \ |
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147 do_klass(reflect_ConstructorAccessorImpl_klass, sun_reflect_ConstructorAccessorImpl, Opt_Only_JDK14NewRef) \ |
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148 do_klass(reflect_DelegatingClassLoader_klass, sun_reflect_DelegatingClassLoader, Opt ) \ |
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149 do_klass(reflect_ConstantPool_klass, sun_reflect_ConstantPool, Opt_Only_JDK15 ) \ |
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150 do_klass(reflect_UnsafeStaticFieldAccessorImpl_klass, sun_reflect_UnsafeStaticFieldAccessorImpl, Opt_Only_JDK15 ) \ |
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151 do_klass(reflect_CallerSensitive_klass, sun_reflect_CallerSensitive, Opt ) \ |
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152 \ |
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153 /* support for dynamic typing; it's OK if these are NULL in earlier JDKs */ \ |
| 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 \ |
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169 /* It's NULL in non-1.4 JDKs. */ \ |
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170 do_klass(StackTraceElement_klass, java_lang_StackTraceElement, Opt ) \ |
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171 /* Universe::is_gte_jdk14x_version() is not set up by this point. */ \ |
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172 /* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \ |
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173 do_klass(nio_Buffer_klass, java_nio_Buffer, Opt ) \ |
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174 \ |
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175 do_klass(PostVMInitHook_klass, sun_misc_PostVMInitHook, Opt ) \ |
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176 \ |
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177 /* Preload boxing klasses */ \ |
| 6852 | 178 do_klass(Boolean_klass, java_lang_Boolean, Pre ) \ |
| 179 do_klass(Character_klass, java_lang_Character, Pre ) \ | |
| 180 do_klass(Float_klass, java_lang_Float, Pre ) \ | |
| 181 do_klass(Double_klass, java_lang_Double, Pre ) \ | |
| 182 do_klass(Byte_klass, java_lang_Byte, Pre ) \ | |
| 183 do_klass(Short_klass, java_lang_Short, Pre ) \ | |
| 184 do_klass(Integer_klass, java_lang_Integer, Pre ) \ | |
| 185 do_klass(Long_klass, java_lang_Long, Pre ) \ | |
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186 \ |
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187 /* Support for Graal */ \ |
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188 do_klass(BitSet_klass, java_util_BitSet, Opt) \ |
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189 /* graal.hotspot */ \ |
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190 do_klass(HotSpotCompiledCode_klass, com_oracle_graal_hotspot_HotSpotCompiledCode, Opt) \ |
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191 do_klass(HotSpotCompiledCode_Comment_klass, com_oracle_graal_hotspot_HotSpotCompiledCode_Comment, Opt) \ |
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192 do_klass(HotSpotCompiledNmethod_klass, com_oracle_graal_hotspot_HotSpotCompiledNmethod, Opt) \ |
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193 do_klass(HotSpotCompiledRuntimeStub_klass, com_oracle_graal_hotspot_HotSpotCompiledRuntimeStub, Opt) \ |
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194 do_klass(HotSpotForeignCallLinkage_klass, com_oracle_graal_hotspot_HotSpotForeignCallLinkage, Opt) \ |
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195 do_klass(HotSpotCodeInfo_klass, com_oracle_graal_hotspot_meta_HotSpotCodeInfo, Opt) \ |
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196 do_klass(HotSpotInstalledCode_klass, com_oracle_graal_hotspot_meta_HotSpotInstalledCode, Opt) \ |
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197 do_klass(HotSpotNmethod_klass, com_oracle_graal_hotspot_meta_HotSpotNmethod, Opt) \ |
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198 do_klass(HotSpotJavaType_klass, com_oracle_graal_hotspot_meta_HotSpotJavaType, Opt) \ |
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199 do_klass(HotSpotMethodData_klass, com_oracle_graal_hotspot_meta_HotSpotMethodData, Opt) \ |
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200 do_klass(HotSpotResolvedJavaField_klass, com_oracle_graal_hotspot_meta_HotSpotResolvedJavaField, Opt) \ |
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201 do_klass(HotSpotResolvedJavaMethod_klass, com_oracle_graal_hotspot_meta_HotSpotResolvedJavaMethod, Opt) \ |
|
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202 do_klass(HotSpotResolvedObjectType_klass, com_oracle_graal_hotspot_meta_HotSpotResolvedObjectType, Opt) \ |
|
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203 do_klass(HotSpotMonitorValue_klass, com_oracle_graal_hotspot_meta_HotSpotMonitorValue, Opt) \ |
|
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204 do_klass(LocalImpl_klass, com_oracle_graal_hotspot_debug_LocalImpl, Opt) \ |
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205 /* graal.api.code */ \ |
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206 do_klass(Assumptions_klass, com_oracle_graal_api_code_Assumptions, Opt) \ |
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207 do_klass(Assumptions_ConcreteMethod_klass, com_oracle_graal_api_code_Assumptions_ConcreteMethod, Opt) \ |
|
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208 do_klass(Assumptions_NoFinalizableSubclass_klass, com_oracle_graal_api_code_Assumptions_NoFinalizableSubclass, Opt) \ |
|
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209 do_klass(Assumptions_ConcreteSubtype_klass, com_oracle_graal_api_code_Assumptions_ConcreteSubtype, Opt) \ |
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210 do_klass(Assumptions_MethodContents_klass, com_oracle_graal_api_code_Assumptions_MethodContents, Opt) \ |
|
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211 do_klass(Assumptions_CallSiteTargetValue_klass, com_oracle_graal_api_code_Assumptions_CallSiteTargetValue, Opt) \ |
|
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212 do_klass(BytecodePosition_klass, com_oracle_graal_api_code_BytecodePosition, Opt) \ |
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213 do_klass(DebugInfo_klass, com_oracle_graal_api_code_DebugInfo, Opt) \ |
|
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214 do_klass(RegisterSaveLayout_klass, com_oracle_graal_api_code_RegisterSaveLayout, Opt) \ |
|
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215 do_klass(BytecodeFrame_klass, com_oracle_graal_api_code_BytecodeFrame, Opt) \ |
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216 do_klass(CompilationResult_klass, com_oracle_graal_api_code_CompilationResult, Opt) \ |
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217 do_klass(CompilationResult_Call_klass, com_oracle_graal_api_code_CompilationResult_Call, Opt) \ |
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218 do_klass(CompilationResult_DataPatch_klass, com_oracle_graal_api_code_CompilationResult_DataPatch, Opt) \ |
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219 do_klass(CompilationResult_ExceptionHandler_klass, com_oracle_graal_api_code_CompilationResult_ExceptionHandler, Opt) \ |
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220 do_klass(CompilationResult_Mark_klass, com_oracle_graal_api_code_CompilationResult_Mark, Opt) \ |
|
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221 do_klass(CompilationResult_Infopoint_klass, com_oracle_graal_api_code_CompilationResult_Infopoint, Opt) \ |
|
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222 do_klass(CompilationResult_Site_klass, com_oracle_graal_api_code_CompilationResult_Site, Opt) \ |
|
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223 do_klass(InfopointReason_klass, com_oracle_graal_api_code_InfopointReason, Opt) \ |
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224 do_klass(code_Register_klass, com_oracle_graal_api_code_Register, Opt) \ |
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225 do_klass(RegisterValue_klass, com_oracle_graal_api_code_RegisterValue, Opt) \ |
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226 do_klass(StackSlot_klass, com_oracle_graal_api_code_StackSlot, Opt) \ |
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227 do_klass(VirtualObject_klass, com_oracle_graal_api_code_VirtualObject, Opt) \ |
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228 /* graal.api.meta */ \ |
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229 do_klass(Constant_klass, com_oracle_graal_api_meta_Constant, Opt) \ |
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230 do_klass(ExceptionHandler_klass, com_oracle_graal_api_meta_ExceptionHandler, Opt) \ |
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231 do_klass(Kind_klass, com_oracle_graal_api_meta_Kind, Opt) \ |
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232 do_klass(JavaMethod_klass, com_oracle_graal_api_meta_JavaMethod, Opt) \ |
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233 do_klass(JavaType_klass, com_oracle_graal_api_meta_JavaType, Opt) \ |
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234 do_klass(Value_klass, com_oracle_graal_api_meta_Value, Opt) \ |
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235 |
|
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236 /*end*/ |
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237 |
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238 |
| 0 | 239 class SystemDictionary : AllStatic { |
| 240 friend class VMStructs; | |
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241 friend class SystemDictionaryHandles; |
| 0 | 242 |
| 243 public: | |
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244 enum WKID { |
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245 NO_WKID = 0, |
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246 |
| 3938 | 247 #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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248 WK_KLASSES_DO(WK_KLASS_ENUM) |
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249 #undef WK_KLASS_ENUM |
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250 |
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251 WKID_LIMIT, |
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252 |
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253 FIRST_WKID = NO_WKID + 1 |
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254 }; |
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255 |
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256 enum InitOption { |
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257 Pre, // preloaded; error if not present |
| 6852 | 258 Pre_JSR292, // preloaded if EnableInvokeDynamic |
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259 |
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260 // Order is significant. Options before this point require resolve_or_fail. |
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261 // Options after this point will use resolve_or_null instead. |
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262 |
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263 Opt, // preload tried; NULL if not present |
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264 Opt_Only_JDK14NewRef, // preload tried; use only with NewReflection |
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265 Opt_Only_JDK15, // preload tried; use only with JDK1.5+ |
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266 OPTION_LIMIT, |
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267 CEIL_LG_OPTION_LIMIT = 4 // OPTION_LIMIT <= (1<<CEIL_LG_OPTION_LIMIT) |
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268 }; |
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269 |
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270 |
| 0 | 271 // Returns a class with a given class name and class loader. Loads the |
| 272 // class if needed. If not found a NoClassDefFoundError or a | |
| 273 // ClassNotFoundException is thrown, depending on the value on the | |
| 274 // throw_error flag. For most uses the throw_error argument should be set | |
| 275 // to true. | |
| 276 | |
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277 static Klass* resolve_or_fail(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS); |
| 0 | 278 // Convenient call for null loader and protection domain. |
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279 static Klass* resolve_or_fail(Symbol* class_name, bool throw_error, TRAPS); |
| 0 | 280 private: |
| 281 // handle error translation for resolve_or_null results | |
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282 static Klass* handle_resolution_exception(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, KlassHandle klass_h, TRAPS); |
| 0 | 283 |
| 284 public: | |
| 285 | |
| 286 // Returns a class with a given class name and class loader. | |
| 287 // Loads the class if needed. If not found NULL is returned. | |
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288 static Klass* resolve_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
| 0 | 289 // Version with null loader and protection domain |
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290 static Klass* resolve_or_null(Symbol* class_name, TRAPS); |
| 0 | 291 |
| 292 // Resolve a superclass or superinterface. Called from ClassFileParser, | |
| 293 // parse_interfaces, resolve_instance_class_or_null, load_shared_class | |
| 294 // "child_name" is the class whose super class or interface is being resolved. | |
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295 static Klass* resolve_super_or_fail(Symbol* child_name, |
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296 Symbol* class_name, |
| 0 | 297 Handle class_loader, |
| 298 Handle protection_domain, | |
| 299 bool is_superclass, | |
| 300 TRAPS); | |
| 301 | |
| 302 // Parse new stream. This won't update the system dictionary or | |
| 303 // class hierarchy, simply parse the stream. Used by JVMTI RedefineClasses. | |
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304 static Klass* parse_stream(Symbol* class_name, |
| 0 | 305 Handle class_loader, |
| 306 Handle protection_domain, | |
| 307 ClassFileStream* st, | |
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308 TRAPS) { |
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309 KlassHandle nullHandle; |
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310 return parse_stream(class_name, class_loader, protection_domain, st, nullHandle, NULL, THREAD); |
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311 } |
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312 static Klass* parse_stream(Symbol* class_name, |
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313 Handle class_loader, |
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314 Handle protection_domain, |
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315 ClassFileStream* st, |
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316 KlassHandle host_klass, |
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317 GrowableArray<Handle>* cp_patches, |
| 0 | 318 TRAPS); |
| 319 | |
| 320 // Resolve from stream (called by jni_DefineClass and JVM_DefineClass) | |
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321 static Klass* resolve_from_stream(Symbol* class_name, Handle class_loader, |
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322 Handle protection_domain, |
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323 ClassFileStream* st, bool verify, TRAPS); |
| 0 | 324 |
| 325 // Lookup an already loaded class. If not found NULL is returned. | |
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326 static Klass* find(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
| 0 | 327 |
| 328 // Lookup an already loaded instance or array class. | |
| 329 // Do not make any queries to class loaders; consult only the cache. | |
| 330 // If not found NULL is returned. | |
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331 static Klass* find_instance_or_array_klass(Symbol* class_name, |
| 0 | 332 Handle class_loader, |
| 333 Handle protection_domain, | |
| 334 TRAPS); | |
| 335 | |
| 336 // Lookup an instance or array class that has already been loaded | |
| 337 // either into the given class loader, or else into another class | |
| 338 // loader that is constrained (via loader constraints) to produce | |
| 339 // a consistent class. Do not take protection domains into account. | |
| 340 // Do not make any queries to class loaders; consult only the cache. | |
| 341 // Return NULL if the class is not found. | |
| 342 // | |
| 343 // This function is a strict superset of find_instance_or_array_klass. | |
| 344 // This function (the unchecked version) makes a conservative prediction | |
| 345 // of the result of the checked version, assuming successful lookup. | |
| 346 // If both functions return non-null, they must return the same value. | |
| 347 // Also, the unchecked version may sometimes be non-null where the | |
| 348 // checked version is null. This can occur in several ways: | |
| 349 // 1. No query has yet been made to the class loader. | |
| 350 // 2. The class loader was queried, but chose not to delegate. | |
| 351 // 3. ClassLoader.checkPackageAccess rejected a proposed protection domain. | |
| 352 // 4. Loading was attempted, but there was a linkage error of some sort. | |
| 353 // In all of these cases, the loader constraints on this type are | |
| 354 // satisfied, and it is safe for classes in the given class loader | |
| 355 // to manipulate strongly-typed values of the found class, subject | |
| 356 // to local linkage and access checks. | |
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357 static Klass* find_constrained_instance_or_array_klass(Symbol* class_name, |
| 0 | 358 Handle class_loader, |
| 359 TRAPS); | |
| 360 | |
| 361 // Iterate over all klasses in dictionary | |
| 362 // Just the classes from defining class loaders | |
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363 static void classes_do(void f(Klass*)); |
| 0 | 364 // Added for initialize_itable_for_klass to handle exceptions |
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365 static void classes_do(void f(Klass*, TRAPS), TRAPS); |
| 0 | 366 // All classes, and their class loaders |
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367 static void classes_do(void f(Klass*, ClassLoaderData*)); |
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368 |
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369 static void placeholders_do(void f(Symbol*)); |
| 0 | 370 |
| 371 // Iterate over all methods in all klasses in dictionary | |
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372 static void methods_do(void f(Method*)); |
| 0 | 373 |
| 374 // Garbage collection support | |
| 375 | |
| 376 // This method applies "blk->do_oop" to all the pointers to "system" | |
| 377 // classes and loaders. | |
| 378 static void always_strong_oops_do(OopClosure* blk); | |
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379 static void always_strong_classes_do(KlassClosure* closure); |
| 0 | 380 |
| 381 // Unload (that is, break root links to) all unmarked classes and | |
| 382 // loaders. Returns "true" iff something was unloaded. | |
| 383 static bool do_unloading(BoolObjectClosure* is_alive); | |
| 384 | |
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385 static int calculate_systemdictionary_size(int loadedclasses); |
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386 |
| 0 | 387 // Applies "f->do_oop" to all root oops in the system dictionary. |
| 388 static void oops_do(OopClosure* f); | |
| 389 | |
| 390 // System loader lock | |
| 391 static oop system_loader_lock() { return _system_loader_lock_obj; } | |
| 392 | |
| 393 private: | |
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394 // Extended Redefine classes support (tbi) |
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395 static void preloaded_classes_do(KlassClosure* f); |
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396 static void lazily_loaded_classes_do(KlassClosure* f); |
| 0 | 397 public: |
| 398 // Sharing support. | |
| 399 static void reorder_dictionary(); | |
| 400 static void copy_buckets(char** top, char* end); | |
| 401 static void copy_table(char** top, char* end); | |
| 402 static void reverse(); | |
| 6197 | 403 static void set_shared_dictionary(HashtableBucket<mtClass>* t, int length, |
| 0 | 404 int number_of_entries); |
| 405 // Printing | |
| 406 static void print() PRODUCT_RETURN; | |
| 407 static void print_class_statistics() PRODUCT_RETURN; | |
| 408 static void print_method_statistics() PRODUCT_RETURN; | |
| 409 | |
| 410 // Number of contained klasses | |
| 411 // This is both fully loaded classes and classes in the process | |
| 412 // of being loaded | |
| 413 static int number_of_classes(); | |
| 414 | |
| 415 // Monotonically increasing counter which grows as classes are | |
| 416 // loaded or modifications such as hot-swapping or setting/removing | |
| 417 // of breakpoints are performed | |
| 418 static inline int number_of_modifications() { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; } | |
| 419 // Needed by evolution and breakpoint code | |
| 420 static inline void notice_modification() { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications; } | |
| 421 | |
| 422 // Verification | |
| 423 static void verify(); | |
| 424 | |
| 425 #ifdef ASSERT | |
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426 static bool is_internal_format(Symbol* class_name); |
| 0 | 427 #endif |
| 428 | |
| 429 // Verify class is in dictionary | |
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430 static void verify_obj_klass_present(Symbol* class_name, |
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431 ClassLoaderData* loader_data); |
| 0 | 432 |
| 433 // Initialization | |
| 434 static void initialize(TRAPS); | |
| 435 | |
| 436 // Fast access to commonly used classes (preloaded) | |
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437 static Klass* check_klass(Klass* k) { |
| 0 | 438 assert(k != NULL, "preloaded klass not initialized"); |
| 439 return k; | |
| 440 } | |
| 441 | |
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442 static Klass* check_klass_Pre( Klass* k) { return check_klass(k); } |
| 6852 | 443 static Klass* check_klass_Pre_JSR292(Klass* k) { return EnableInvokeDynamic ? check_klass(k) : k; } |
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444 static Klass* check_klass_Opt( Klass* k) { return k; } |
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445 static Klass* check_klass_Opt_Only_JDK15(Klass* k) { |
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446 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only"); |
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447 return k; |
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448 } |
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449 static Klass* check_klass_Opt_Only_JDK14NewRef(Klass* k) { |
| 0 | 450 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only"); |
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451 // despite the optional loading, if you use this it must be present: |
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452 return check_klass(k); |
| 0 | 453 } |
| 454 | |
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455 static bool initialize_wk_klass(WKID id, int init_opt, TRAPS); |
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456 static void initialize_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS); |
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457 static void initialize_wk_klasses_through(WKID end_id, WKID &start_id, TRAPS) { |
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458 int limit = (int)end_id + 1; |
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459 initialize_wk_klasses_until((WKID) limit, start_id, THREAD); |
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460 } |
| 0 | 461 |
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462 public: |
| 3938 | 463 #define WK_KLASS_DECLARE(name, symbol, option) \ |
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464 static Klass* name() { return check_klass_##option(_well_known_klasses[WK_KLASS_ENUM_NAME(name)]); } \ |
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465 static Klass** name##_addr() { \ |
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466 return &SystemDictionary::_well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)]; \ |
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467 } |
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468 WK_KLASSES_DO(WK_KLASS_DECLARE); |
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469 #undef WK_KLASS_DECLARE |
| 0 | 470 |
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471 static Klass* well_known_klass(WKID id) { |
| 3938 | 472 assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob"); |
| 473 return _well_known_klasses[id]; | |
| 474 } | |
| 475 | |
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476 static Klass** well_known_klass_addr(WKID id) { |
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477 assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob"); |
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478 return &_well_known_klasses[id]; |
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479 } |
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480 |
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481 // Local definition for direct access to the private array: |
| 147 | 482 #define WK_KLASS(name) _well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)] |
| 0 | 483 |
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484 static Klass* box_klass(BasicType t) { |
| 0 | 485 assert((uint)t < T_VOID+1, "range check"); |
| 486 return check_klass(_box_klasses[t]); | |
| 487 } | |
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488 static BasicType box_klass_type(Klass* k); // inverse of box_klass |
| 0 | 489 |
| 490 // methods returning lazily loaded klasses | |
| 491 // The corresponding method to load the class must be called before calling them. | |
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492 static Klass* abstract_ownable_synchronizer_klass() { return check_klass(_abstract_ownable_synchronizer_klass); } |
| 0 | 493 |
| 494 static void load_abstract_ownable_synchronizer_klass(TRAPS); | |
| 495 | |
| 496 private: | |
| 497 // Tells whether ClassLoader.loadClassInternal is present | |
| 498 static bool has_loadClassInternal() { return _has_loadClassInternal; } | |
| 499 | |
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500 // Returns the class loader data to be used when looking up/updating the |
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501 // system dictionary. |
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502 static ClassLoaderData *class_loader_data(Handle class_loader) { |
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503 return ClassLoaderData::class_loader_data(class_loader()); |
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504 } |
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505 |
| 0 | 506 public: |
| 507 // Tells whether ClassLoader.checkPackageAccess is present | |
| 508 static bool has_checkPackageAccess() { return _has_checkPackageAccess; } | |
| 509 | |
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510 static bool Parameter_klass_loaded() { return WK_KLASS(reflect_Parameter_klass) != NULL; } |
| 1142 | 511 static bool Class_klass_loaded() { return WK_KLASS(Class_klass) != NULL; } |
| 512 static bool Cloneable_klass_loaded() { return WK_KLASS(Cloneable_klass) != NULL; } | |
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513 static bool Object_klass_loaded() { return WK_KLASS(Object_klass) != NULL; } |
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514 static bool ClassLoader_klass_loaded() { return WK_KLASS(ClassLoader_klass) != NULL; } |
| 0 | 515 |
| 516 // Returns default system loader | |
| 517 static oop java_system_loader(); | |
| 518 | |
| 519 // Compute the default system loader | |
| 520 static void compute_java_system_loader(TRAPS); | |
| 521 | |
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522 // Register a new class loader |
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523 static ClassLoaderData* register_loader(Handle class_loader, TRAPS); |
| 0 | 524 private: |
| 525 // Mirrors for primitive classes (created eagerly) | |
| 526 static oop check_mirror(oop m) { | |
| 527 assert(m != NULL, "mirror not initialized"); | |
| 528 return m; | |
| 529 } | |
| 530 | |
| 531 public: | |
| 532 // Note: java_lang_Class::primitive_type is the inverse of java_mirror | |
| 533 | |
| 534 // Check class loader constraints | |
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535 static bool add_loader_constraint(Symbol* name, Handle loader1, |
| 0 | 536 Handle loader2, TRAPS); |
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537 static Symbol* check_signature_loaders(Symbol* signature, Handle loader1, |
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538 Handle loader2, bool is_method, TRAPS); |
| 0 | 539 |
| 710 | 540 // JSR 292 |
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541 // find a java.lang.invoke.MethodHandle.invoke* method for a given signature |
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542 // (asks Java to compute it if necessary, except in a compiler thread) |
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543 static methodHandle find_method_handle_invoker(Symbol* name, |
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544 Symbol* signature, |
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545 KlassHandle accessing_klass, |
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546 Handle *appendix_result, |
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547 Handle *method_type_result, |
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548 TRAPS); |
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549 // for a given signature, find the internal MethodHandle method (linkTo* or invokeBasic) |
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550 // (does not ask Java, since this is a low-level intrinsic defined by the JVM) |
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551 static methodHandle find_method_handle_intrinsic(vmIntrinsics::ID iid, |
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552 Symbol* signature, |
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553 TRAPS); |
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554 // find a java.lang.invoke.MethodType object for a given signature |
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555 // (asks Java to compute it if necessary, except in a compiler thread) |
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556 static Handle find_method_handle_type(Symbol* signature, |
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557 KlassHandle accessing_klass, |
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558 TRAPS); |
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559 |
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560 // ask Java to compute a java.lang.invoke.MethodHandle object for a given CP entry |
| 1602 | 561 static Handle link_method_handle_constant(KlassHandle caller, |
| 562 int ref_kind, //e.g., JVM_REF_invokeVirtual | |
| 563 KlassHandle callee, | |
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564 Symbol* name, |
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565 Symbol* signature, |
| 1602 | 566 TRAPS); |
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567 |
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568 // ask Java to create a dynamic call site, while linking an invokedynamic op |
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569 static methodHandle find_dynamic_call_site_invoker(KlassHandle caller, |
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570 Handle bootstrap_method, |
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571 Symbol* name, |
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572 Symbol* type, |
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573 Handle *appendix_result, |
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574 Handle *method_type_result, |
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575 TRAPS); |
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576 |
| 0 | 577 // Utility for printing loader "name" as part of tracing constraints |
| 578 static const char* loader_name(oop loader) { | |
| 579 return ((loader) == NULL ? "<bootloader>" : | |
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580 InstanceKlass::cast((loader)->klass())->name()->as_C_string() ); |
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581 } |
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582 static const char* loader_name(ClassLoaderData* loader_data) { |
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583 return (loader_data->class_loader() == NULL ? "<bootloader>" : |
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584 InstanceKlass::cast((loader_data->class_loader())->klass())->name()->as_C_string() ); |
| 0 | 585 } |
| 586 | |
| 587 // Record the error when the first attempt to resolve a reference from a constant | |
| 588 // pool entry to a class fails. | |
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589 static void add_resolution_error(constantPoolHandle pool, int which, Symbol* error); |
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590 static void delete_resolution_error(ConstantPool* pool); |
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591 static Symbol* find_resolution_error(constantPoolHandle pool, int which); |
| 0 | 592 |
| 593 private: | |
| 594 | |
| 595 enum Constants { | |
| 596 _loader_constraint_size = 107, // number of entries in constraint table | |
| 597 _resolution_error_size = 107, // number of entries in resolution error table | |
| 710 | 598 _invoke_method_size = 139, // number of entries in invoke method table |
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599 _nof_buckets = 1009, // number of buckets in hash table for placeholders |
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600 _old_default_sdsize = 1009, // backward compat for system dictionary size |
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601 _prime_array_size = 8, // array of primes for system dictionary size |
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602 _average_depth_goal = 3 // goal for lookup length |
| 0 | 603 }; |
| 604 | |
| 605 | |
| 606 // Static variables | |
| 607 | |
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608 // hashtable sizes for system dictionary to allow growth |
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609 // prime numbers for system dictionary size |
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610 static int _sdgeneration; |
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611 static const int _primelist[_prime_array_size]; |
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612 |
| 0 | 613 // Hashtable holding loaded classes. |
| 614 static Dictionary* _dictionary; | |
| 615 | |
| 616 // Hashtable holding placeholders for classes being loaded. | |
| 617 static PlaceholderTable* _placeholders; | |
| 618 | |
| 619 // Hashtable holding classes from the shared archive. | |
| 620 static Dictionary* _shared_dictionary; | |
| 621 | |
| 622 // Monotonically increasing counter which grows with | |
| 623 // _number_of_classes as well as hot-swapping and breakpoint setting | |
| 624 // and removal. | |
| 625 static int _number_of_modifications; | |
| 626 | |
| 627 // Lock object for system class loader | |
| 628 static oop _system_loader_lock_obj; | |
| 629 | |
| 630 // Constraints on class loaders | |
| 631 static LoaderConstraintTable* _loader_constraints; | |
| 632 | |
| 633 // Resolution errors | |
| 634 static ResolutionErrorTable* _resolution_errors; | |
| 635 | |
| 710 | 636 // Invoke methods (JSR 292) |
| 637 static SymbolPropertyTable* _invoke_method_table; | |
| 638 | |
| 0 | 639 public: |
| 640 // for VM_CounterDecay iteration support | |
| 641 friend class CounterDecay; | |
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642 static Klass* try_get_next_class(); |
| 0 | 643 |
| 644 private: | |
| 645 static void validate_protection_domain(instanceKlassHandle klass, | |
| 646 Handle class_loader, | |
| 647 Handle protection_domain, TRAPS); | |
| 648 | |
| 649 friend class VM_PopulateDumpSharedSpace; | |
| 650 friend class TraversePlaceholdersClosure; | |
| 651 static Dictionary* dictionary() { return _dictionary; } | |
| 652 static Dictionary* shared_dictionary() { return _shared_dictionary; } | |
| 653 static PlaceholderTable* placeholders() { return _placeholders; } | |
| 654 static LoaderConstraintTable* constraints() { return _loader_constraints; } | |
| 655 static ResolutionErrorTable* resolution_errors() { return _resolution_errors; } | |
| 710 | 656 static SymbolPropertyTable* invoke_method_table() { return _invoke_method_table; } |
| 0 | 657 |
| 658 // Basic loading operations | |
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659 static Klass* resolve_instance_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
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660 static Klass* resolve_array_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
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661 static instanceKlassHandle handle_parallel_super_load(Symbol* class_name, Symbol* supername, Handle class_loader, Handle protection_domain, Handle lockObject, TRAPS); |
| 0 | 662 // Wait on SystemDictionary_lock; unlocks lockObject before |
| 663 // waiting; relocks lockObject with correct recursion count | |
| 664 // after waiting, but before reentering SystemDictionary_lock | |
| 665 // to preserve lock order semantics. | |
| 666 static void double_lock_wait(Handle lockObject, TRAPS); | |
| 667 static void define_instance_class(instanceKlassHandle k, TRAPS); | |
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668 static instanceKlassHandle find_or_define_instance_class(Symbol* class_name, |
| 0 | 669 Handle class_loader, |
| 670 instanceKlassHandle k, TRAPS); | |
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671 static instanceKlassHandle load_shared_class(Symbol* class_name, |
| 0 | 672 Handle class_loader, TRAPS); |
| 673 static instanceKlassHandle load_shared_class(instanceKlassHandle ik, | |
| 674 Handle class_loader, TRAPS); | |
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675 static void clean_up_shared_class(instanceKlassHandle ik, Handle class_loader, TRAPS); |
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676 static instanceKlassHandle load_instance_class(Symbol* class_name, Handle class_loader, TRAPS); |
| 0 | 677 static Handle compute_loader_lock_object(Handle class_loader, TRAPS); |
| 678 static void check_loader_lock_contention(Handle loader_lock, TRAPS); | |
| 514 | 679 static bool is_parallelCapable(Handle class_loader); |
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680 static bool is_parallelDefine(Handle class_loader); |
| 0 | 681 |
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682 public: |
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683 static bool is_ext_class_loader(Handle class_loader); |
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684 |
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685 private: |
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686 static Klass* find_shared_class(Symbol* class_name); |
| 0 | 687 |
| 688 // Setup link to hierarchy | |
| 689 static void add_to_hierarchy(instanceKlassHandle k, TRAPS); | |
| 690 | |
| 10405 | 691 // event based tracing |
| 692 static void post_class_load_event(TracingTime start_time, instanceKlassHandle k, | |
| 693 Handle initiating_loader); | |
| 0 | 694 // We pass in the hashtable index so we can calculate it outside of |
| 695 // the SystemDictionary_lock. | |
| 696 | |
| 697 // Basic find on loaded classes | |
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698 static Klass* find_class(int index, unsigned int hash, |
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699 Symbol* name, ClassLoaderData* loader_data); |
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700 static Klass* find_class(Symbol* class_name, ClassLoaderData* loader_data); |
| 0 | 701 |
| 702 // Basic find on classes in the midst of being loaded | |
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703 static Symbol* find_placeholder(Symbol* name, ClassLoaderData* loader_data); |
| 0 | 704 |
| 705 // Updating entry in dictionary | |
| 706 // Add a completely loaded class | |
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707 static void add_klass(int index, Symbol* class_name, |
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708 ClassLoaderData* loader_data, KlassHandle obj); |
| 0 | 709 |
| 710 // Add a placeholder for a class being loaded | |
| 711 static void add_placeholder(int index, | |
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712 Symbol* class_name, |
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713 ClassLoaderData* loader_data); |
| 0 | 714 static void remove_placeholder(int index, |
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715 Symbol* class_name, |
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716 ClassLoaderData* loader_data); |
| 0 | 717 |
| 718 // Performs cleanups after resolve_super_or_fail. This typically needs | |
| 719 // to be called on failure. | |
| 720 // Won't throw, but can block. | |
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721 static void resolution_cleanups(Symbol* class_name, |
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722 ClassLoaderData* loader_data, |
| 0 | 723 TRAPS); |
| 724 | |
| 725 // Initialization | |
| 726 static void initialize_preloaded_classes(TRAPS); | |
| 727 | |
| 728 // Class loader constraints | |
| 729 static void check_constraints(int index, unsigned int hash, | |
| 730 instanceKlassHandle k, Handle loader, | |
| 731 bool defining, TRAPS); | |
| 732 static void update_dictionary(int d_index, unsigned int d_hash, | |
| 733 int p_index, unsigned int p_hash, | |
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734 instanceKlassHandle k, Handle loader, |
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735 TRAPS); |
| 0 | 736 |
| 737 // Variables holding commonly used klasses (preloaded) | |
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738 static Klass* _well_known_klasses[]; |
| 0 | 739 |
| 740 // Lazily loaded klasses | |
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741 static Klass* volatile _abstract_ownable_synchronizer_klass; |
| 0 | 742 |
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743 // table of box klasses (int_klass, etc.) |
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744 static Klass* _box_klasses[T_VOID+1]; |
| 0 | 745 |
| 746 static oop _java_system_loader; | |
| 747 | |
| 748 static bool _has_loadClassInternal; | |
| 749 static bool _has_checkPackageAccess; | |
| 750 }; | |
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751 |
| 1972 | 752 #endif // SHARE_VM_CLASSFILE_SYSTEMDICTIONARY_HPP |