Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/systemDictionary.hpp @ 6143:8b0a4867acf0
7174218: remove AtomicLongCSImpl intrinsics
Reviewed-by: kvn, twisti
Contributed-by: Krystal Mok <sajia@taobao.com>
| author | twisti |
|---|---|
| date | Tue, 12 Jun 2012 14:31:44 -0700 |
| parents | b2cd0ee8f778 |
| children | d2a62e0f25eb |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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" | |
| 35 | |
| 0 | 36 // The system dictionary stores all loaded classes and maps: |
| 37 // | |
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38 // [class name,class loader] -> class i.e. [Symbol*,oop] -> klassOop |
| 0 | 39 // |
| 40 // Classes are loaded lazily. The default VM class loader is | |
| 41 // represented as NULL. | |
| 42 | |
| 43 // The underlying data structure is an open hash table with a fixed number | |
| 44 // of buckets. During loading the loader object is locked, (for the VM loader | |
| 45 // a private lock object is used). Class loading can thus be done concurrently, | |
| 46 // but only by different loaders. | |
| 47 // | |
| 48 // During loading a placeholder (name, loader) is temporarily placed in | |
| 49 // a side data structure, and is used to detect ClassCircularityErrors | |
| 50 // and to perform verification during GC. A GC can occur in the midst | |
| 51 // of class loading, as we call out to Java, have to take locks, etc. | |
| 52 // | |
| 53 // When class loading is finished, a new entry is added to the system | |
| 54 // dictionary and the place holder is removed. Note that the protection | |
| 55 // domain field of the system dictionary has not yet been filled in when | |
| 56 // the "real" system dictionary entry is created. | |
| 57 // | |
| 58 // Clients of this class who are interested in finding if a class has | |
| 59 // been completely loaded -- not classes in the process of being loaded -- | |
| 60 // can read the SystemDictionary unlocked. This is safe because | |
| 61 // - entries are only deleted at safepoints | |
| 62 // - readers cannot come to a safepoint while actively examining | |
| 63 // an entry (an entry cannot be deleted from under a reader) | |
| 64 // - entries must be fully formed before they are available to concurrent | |
| 65 // readers (we must ensure write ordering) | |
| 66 // | |
| 67 // Note that placeholders are deleted at any time, as they are removed | |
| 68 // when a class is completely loaded. Therefore, readers as well as writers | |
| 69 // of placeholders must hold the SystemDictionary_lock. | |
| 70 // | |
| 71 | |
| 72 class Dictionary; | |
| 73 class PlaceholderTable; | |
| 74 class LoaderConstraintTable; | |
| 75 class HashtableBucket; | |
| 76 class ResolutionErrorTable; | |
| 710 | 77 class SymbolPropertyTable; |
| 0 | 78 |
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79 // Certain classes are preloaded, such as java.lang.Object and java.lang.String. |
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80 // They are all "well-known", in the sense that no class loader is allowed |
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81 // to provide a different definition. |
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82 // |
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83 // These klasses must all have names defined in vmSymbols. |
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84 |
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85 #define WK_KLASS_ENUM_NAME(kname) kname##_knum |
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86 |
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87 // Each well-known class has a short klass name (like object_klass), |
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88 // a vmSymbol name (like java_lang_Object), and a flag word |
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89 // that makes some minor distinctions, like whether the klass |
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90 // is preloaded, optional, release-specific, etc. |
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91 // The order of these definitions is significant; it is the order in which |
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92 // preloading is actually performed by initialize_preloaded_classes. |
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93 |
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94 #define WK_KLASSES_DO(template) \ |
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95 /* well-known classes */ \ |
| 1142 | 96 template(Object_klass, java_lang_Object, Pre) \ |
| 97 template(String_klass, java_lang_String, Pre) \ | |
| 98 template(Class_klass, java_lang_Class, Pre) \ | |
| 99 template(Cloneable_klass, java_lang_Cloneable, Pre) \ | |
| 100 template(ClassLoader_klass, java_lang_ClassLoader, Pre) \ | |
| 101 template(Serializable_klass, java_io_Serializable, Pre) \ | |
| 102 template(System_klass, java_lang_System, Pre) \ | |
| 103 template(Throwable_klass, java_lang_Throwable, Pre) \ | |
| 104 template(Error_klass, java_lang_Error, Pre) \ | |
| 105 template(ThreadDeath_klass, java_lang_ThreadDeath, Pre) \ | |
| 106 template(Exception_klass, java_lang_Exception, Pre) \ | |
| 107 template(RuntimeException_klass, java_lang_RuntimeException, Pre) \ | |
| 108 template(ProtectionDomain_klass, java_security_ProtectionDomain, Pre) \ | |
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109 template(AccessControlContext_klass, java_security_AccessControlContext, Pre) \ |
| 1142 | 110 template(ClassNotFoundException_klass, java_lang_ClassNotFoundException, Pre) \ |
| 111 template(NoClassDefFoundError_klass, java_lang_NoClassDefFoundError, Pre) \ | |
| 112 template(LinkageError_klass, java_lang_LinkageError, Pre) \ | |
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113 template(ClassCastException_klass, java_lang_ClassCastException, Pre) \ |
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114 template(ArrayStoreException_klass, java_lang_ArrayStoreException, Pre) \ |
| 1142 | 115 template(VirtualMachineError_klass, java_lang_VirtualMachineError, Pre) \ |
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116 template(OutOfMemoryError_klass, java_lang_OutOfMemoryError, Pre) \ |
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117 template(StackOverflowError_klass, java_lang_StackOverflowError, Pre) \ |
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118 template(IllegalMonitorStateException_klass, java_lang_IllegalMonitorStateException, Pre) \ |
| 1142 | 119 template(Reference_klass, java_lang_ref_Reference, Pre) \ |
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120 \ |
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121 /* Preload ref klasses and set reference types */ \ |
| 1142 | 122 template(SoftReference_klass, java_lang_ref_SoftReference, Pre) \ |
| 123 template(WeakReference_klass, java_lang_ref_WeakReference, Pre) \ | |
| 124 template(FinalReference_klass, java_lang_ref_FinalReference, Pre) \ | |
| 125 template(PhantomReference_klass, java_lang_ref_PhantomReference, Pre) \ | |
| 126 template(Finalizer_klass, java_lang_ref_Finalizer, Pre) \ | |
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127 \ |
| 1142 | 128 template(Thread_klass, java_lang_Thread, Pre) \ |
| 129 template(ThreadGroup_klass, java_lang_ThreadGroup, Pre) \ | |
| 130 template(Properties_klass, java_util_Properties, Pre) \ | |
| 131 template(reflect_AccessibleObject_klass, java_lang_reflect_AccessibleObject, Pre) \ | |
| 132 template(reflect_Field_klass, java_lang_reflect_Field, Pre) \ | |
| 133 template(reflect_Method_klass, java_lang_reflect_Method, Pre) \ | |
| 134 template(reflect_Constructor_klass, java_lang_reflect_Constructor, Pre) \ | |
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135 \ |
| 3938 | 136 /* NOTE: needed too early in bootstrapping process to have checks based on JDK version */ \ |
| 137 /* Universe::is_gte_jdk14x_version() is not set up by this point. */ \ | |
| 138 /* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \ | |
| 139 template(reflect_MagicAccessorImpl_klass, sun_reflect_MagicAccessorImpl, Opt) \ | |
| 140 template(reflect_MethodAccessorImpl_klass, sun_reflect_MethodAccessorImpl, Opt_Only_JDK14NewRef) \ | |
| 141 template(reflect_ConstructorAccessorImpl_klass, sun_reflect_ConstructorAccessorImpl, Opt_Only_JDK14NewRef) \ | |
| 142 template(reflect_DelegatingClassLoader_klass, sun_reflect_DelegatingClassLoader, Opt) \ | |
| 143 template(reflect_ConstantPool_klass, sun_reflect_ConstantPool, Opt_Only_JDK15) \ | |
| 144 template(reflect_UnsafeStaticFieldAccessorImpl_klass, sun_reflect_UnsafeStaticFieldAccessorImpl, Opt_Only_JDK15) \ | |
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145 \ |
| 710 | 146 /* support for dynamic typing; it's OK if these are NULL in earlier JDKs */ \ |
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147 template(MethodHandle_klass, java_lang_invoke_MethodHandle, Pre_JSR292) \ |
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148 template(MemberName_klass, java_lang_invoke_MemberName, Pre_JSR292) \ |
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149 template(MethodHandleNatives_klass, java_lang_invoke_MethodHandleNatives, Pre_JSR292) \ |
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150 template(AdapterMethodHandle_klass, java_lang_invoke_AdapterMethodHandle, Pre_JSR292) \ |
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151 template(BoundMethodHandle_klass, java_lang_invoke_BoundMethodHandle, Pre_JSR292) \ |
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152 template(DirectMethodHandle_klass, java_lang_invoke_DirectMethodHandle, Pre_JSR292) \ |
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153 template(MethodType_klass, java_lang_invoke_MethodType, Pre_JSR292) \ |
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154 template(MethodTypeForm_klass, java_lang_invoke_MethodTypeForm, Pre_JSR292) \ |
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155 template(BootstrapMethodError_klass, java_lang_BootstrapMethodError, Pre_JSR292) \ |
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156 template(WrongMethodTypeException_klass, java_lang_invoke_WrongMethodTypeException, Pre_JSR292) \ |
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157 template(CallSite_klass, java_lang_invoke_CallSite, Pre_JSR292) \ |
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158 template(CountingMethodHandle_klass, java_lang_invoke_CountingMethodHandle, Opt) \ |
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159 template(ConstantCallSite_klass, java_lang_invoke_ConstantCallSite, Pre_JSR292) \ |
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160 template(MutableCallSite_klass, java_lang_invoke_MutableCallSite, Pre_JSR292) \ |
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161 template(VolatileCallSite_klass, java_lang_invoke_VolatileCallSite, Pre_JSR292) \ |
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162 /* Note: MethodHandle must be first, and VolatileCallSite last in group */ \ |
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163 \ |
| 1142 | 164 template(StringBuffer_klass, java_lang_StringBuffer, Pre) \ |
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165 template(StringBuilder_klass, java_lang_StringBuilder, Pre) \ |
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166 \ |
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167 /* It's NULL in non-1.4 JDKs. */ \ |
| 1142 | 168 template(StackTraceElement_klass, java_lang_StackTraceElement, Opt) \ |
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169 /* Universe::is_gte_jdk14x_version() is not set up by this point. */ \ |
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170 /* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \ |
| 3938 | 171 template(nio_Buffer_klass, java_nio_Buffer, Opt) \ |
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172 \ |
| 3938 | 173 template(DownloadManager_klass, sun_jkernel_DownloadManager, Opt_Kernel) \ |
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174 \ |
| 3938 | 175 template(PostVMInitHook_klass, sun_misc_PostVMInitHook, Opt) \ |
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176 \ |
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177 /* Preload boxing klasses */ \ |
| 1142 | 178 template(Boolean_klass, java_lang_Boolean, Pre) \ |
| 179 template(Character_klass, java_lang_Character, Pre) \ | |
| 180 template(Float_klass, java_lang_Float, Pre) \ | |
| 181 template(Double_klass, java_lang_Double, Pre) \ | |
| 182 template(Byte_klass, java_lang_Byte, Pre) \ | |
| 183 template(Short_klass, java_lang_Short, Pre) \ | |
| 184 template(Integer_klass, java_lang_Integer, Pre) \ | |
| 185 template(Long_klass, java_lang_Long, Pre) \ | |
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186 /*end*/ |
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187 |
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188 |
| 0 | 189 class SystemDictionary : AllStatic { |
| 190 friend class VMStructs; | |
| 191 friend class CompactingPermGenGen; | |
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192 friend class SystemDictionaryHandles; |
| 0 | 193 NOT_PRODUCT(friend class instanceKlassKlass;) |
| 194 | |
| 195 public: | |
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196 enum WKID { |
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197 NO_WKID = 0, |
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198 |
| 3938 | 199 #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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200 WK_KLASSES_DO(WK_KLASS_ENUM) |
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201 #undef WK_KLASS_ENUM |
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202 |
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203 WKID_LIMIT, |
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204 |
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205 FIRST_WKID = NO_WKID + 1 |
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206 }; |
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207 |
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208 enum InitOption { |
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209 Pre, // preloaded; error if not present |
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210 Pre_JSR292, // preloaded if EnableInvokeDynamic |
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211 |
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212 // Order is significant. Options before this point require resolve_or_fail. |
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213 // Options after this point will use resolve_or_null instead. |
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214 |
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215 Opt, // preload tried; NULL if not present |
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216 Opt_Only_JDK14NewRef, // preload tried; use only with NewReflection |
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217 Opt_Only_JDK15, // preload tried; use only with JDK1.5+ |
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218 Opt_Kernel, // preload tried only #ifdef KERNEL |
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219 OPTION_LIMIT, |
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220 CEIL_LG_OPTION_LIMIT = 4 // OPTION_LIMIT <= (1<<CEIL_LG_OPTION_LIMIT) |
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221 }; |
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222 |
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223 |
| 0 | 224 // Returns a class with a given class name and class loader. Loads the |
| 225 // class if needed. If not found a NoClassDefFoundError or a | |
| 226 // ClassNotFoundException is thrown, depending on the value on the | |
| 227 // throw_error flag. For most uses the throw_error argument should be set | |
| 228 // to true. | |
| 229 | |
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230 static klassOop resolve_or_fail(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS); |
| 0 | 231 // Convenient call for null loader and protection domain. |
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232 static klassOop resolve_or_fail(Symbol* class_name, bool throw_error, TRAPS); |
| 0 | 233 private: |
| 234 // handle error translation for resolve_or_null results | |
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235 static klassOop handle_resolution_exception(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, KlassHandle klass_h, TRAPS); |
| 0 | 236 |
| 237 public: | |
| 238 | |
| 239 // Returns a class with a given class name and class loader. | |
| 240 // Loads the class if needed. If not found NULL is returned. | |
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241 static klassOop resolve_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
| 0 | 242 // Version with null loader and protection domain |
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243 static klassOop resolve_or_null(Symbol* class_name, TRAPS); |
| 0 | 244 |
| 245 // Resolve a superclass or superinterface. Called from ClassFileParser, | |
| 246 // parse_interfaces, resolve_instance_class_or_null, load_shared_class | |
| 247 // "child_name" is the class whose super class or interface is being resolved. | |
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248 static klassOop resolve_super_or_fail(Symbol* child_name, |
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249 Symbol* class_name, |
| 0 | 250 Handle class_loader, |
| 251 Handle protection_domain, | |
| 252 bool is_superclass, | |
| 253 TRAPS); | |
| 254 | |
| 255 // Parse new stream. This won't update the system dictionary or | |
| 256 // class hierarchy, simply parse the stream. Used by JVMTI RedefineClasses. | |
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257 static klassOop parse_stream(Symbol* class_name, |
| 0 | 258 Handle class_loader, |
| 259 Handle protection_domain, | |
| 260 ClassFileStream* st, | |
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261 TRAPS) { |
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262 KlassHandle nullHandle; |
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263 return parse_stream(class_name, class_loader, protection_domain, st, nullHandle, NULL, THREAD); |
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264 } |
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265 static klassOop parse_stream(Symbol* class_name, |
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266 Handle class_loader, |
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267 Handle protection_domain, |
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268 ClassFileStream* st, |
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269 KlassHandle host_klass, |
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270 GrowableArray<Handle>* cp_patches, |
| 0 | 271 TRAPS); |
| 272 | |
| 273 // Resolve from stream (called by jni_DefineClass and JVM_DefineClass) | |
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274 static klassOop resolve_from_stream(Symbol* class_name, Handle class_loader, |
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275 Handle protection_domain, |
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276 ClassFileStream* st, bool verify, TRAPS); |
| 0 | 277 |
| 278 // Lookup an already loaded class. If not found NULL is returned. | |
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279 static klassOop find(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
| 0 | 280 |
| 281 // Lookup an already loaded instance or array class. | |
| 282 // Do not make any queries to class loaders; consult only the cache. | |
| 283 // If not found NULL is returned. | |
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284 static klassOop find_instance_or_array_klass(Symbol* class_name, |
| 0 | 285 Handle class_loader, |
| 286 Handle protection_domain, | |
| 287 TRAPS); | |
| 288 | |
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289 // If the given name is known to vmSymbols, return the well-know klass: |
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290 static klassOop find_well_known_klass(Symbol* class_name); |
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291 |
| 0 | 292 // Lookup an instance or array class that has already been loaded |
| 293 // either into the given class loader, or else into another class | |
| 294 // loader that is constrained (via loader constraints) to produce | |
| 295 // a consistent class. Do not take protection domains into account. | |
| 296 // Do not make any queries to class loaders; consult only the cache. | |
| 297 // Return NULL if the class is not found. | |
| 298 // | |
| 299 // This function is a strict superset of find_instance_or_array_klass. | |
| 300 // This function (the unchecked version) makes a conservative prediction | |
| 301 // of the result of the checked version, assuming successful lookup. | |
| 302 // If both functions return non-null, they must return the same value. | |
| 303 // Also, the unchecked version may sometimes be non-null where the | |
| 304 // checked version is null. This can occur in several ways: | |
| 305 // 1. No query has yet been made to the class loader. | |
| 306 // 2. The class loader was queried, but chose not to delegate. | |
| 307 // 3. ClassLoader.checkPackageAccess rejected a proposed protection domain. | |
| 308 // 4. Loading was attempted, but there was a linkage error of some sort. | |
| 309 // In all of these cases, the loader constraints on this type are | |
| 310 // satisfied, and it is safe for classes in the given class loader | |
| 311 // to manipulate strongly-typed values of the found class, subject | |
| 312 // to local linkage and access checks. | |
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313 static klassOop find_constrained_instance_or_array_klass(Symbol* class_name, |
| 0 | 314 Handle class_loader, |
| 315 TRAPS); | |
| 316 | |
| 317 // Iterate over all klasses in dictionary | |
| 318 // Just the classes from defining class loaders | |
| 319 static void classes_do(void f(klassOop)); | |
| 320 // Added for initialize_itable_for_klass to handle exceptions | |
| 321 static void classes_do(void f(klassOop, TRAPS), TRAPS); | |
| 322 // All classes, and their class loaders | |
| 323 static void classes_do(void f(klassOop, oop)); | |
| 324 // All classes, and their class loaders | |
| 325 // (added for helpers that use HandleMarks and ResourceMarks) | |
| 326 static void classes_do(void f(klassOop, oop, TRAPS), TRAPS); | |
| 327 // All entries in the placeholder table and their class loaders | |
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328 static void placeholders_do(void f(Symbol*, oop)); |
| 0 | 329 |
| 330 // Iterate over all methods in all klasses in dictionary | |
| 331 static void methods_do(void f(methodOop)); | |
| 332 | |
| 333 // Garbage collection support | |
| 334 | |
| 335 // This method applies "blk->do_oop" to all the pointers to "system" | |
| 336 // classes and loaders. | |
| 337 static void always_strong_oops_do(OopClosure* blk); | |
| 338 static void always_strong_classes_do(OopClosure* blk); | |
| 339 // This method applies "blk->do_oop" to all the placeholders. | |
| 340 static void placeholders_do(OopClosure* blk); | |
| 341 | |
| 342 // Unload (that is, break root links to) all unmarked classes and | |
| 343 // loaders. Returns "true" iff something was unloaded. | |
| 344 static bool do_unloading(BoolObjectClosure* is_alive); | |
| 345 | |
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346 static int calculate_systemdictionary_size(int loadedclasses); |
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347 |
| 0 | 348 // Applies "f->do_oop" to all root oops in the system dictionary. |
| 349 static void oops_do(OopClosure* f); | |
| 350 | |
| 351 // System loader lock | |
| 352 static oop system_loader_lock() { return _system_loader_lock_obj; } | |
| 353 | |
| 354 private: | |
| 355 // Traverses preloaded oops: various system classes. These are | |
| 356 // guaranteed to be in the perm gen. | |
| 357 static void preloaded_oops_do(OopClosure* f); | |
| 358 static void lazily_loaded_oops_do(OopClosure* f); | |
| 359 | |
| 360 public: | |
| 361 // Sharing support. | |
| 362 static void reorder_dictionary(); | |
| 363 static void copy_buckets(char** top, char* end); | |
| 364 static void copy_table(char** top, char* end); | |
| 365 static void reverse(); | |
| 366 static void set_shared_dictionary(HashtableBucket* t, int length, | |
| 367 int number_of_entries); | |
| 368 // Printing | |
| 369 static void print() PRODUCT_RETURN; | |
| 370 static void print_class_statistics() PRODUCT_RETURN; | |
| 371 static void print_method_statistics() PRODUCT_RETURN; | |
| 372 | |
| 373 // Number of contained klasses | |
| 374 // This is both fully loaded classes and classes in the process | |
| 375 // of being loaded | |
| 376 static int number_of_classes(); | |
| 377 | |
| 378 // Monotonically increasing counter which grows as classes are | |
| 379 // loaded or modifications such as hot-swapping or setting/removing | |
| 380 // of breakpoints are performed | |
| 381 static inline int number_of_modifications() { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; } | |
| 382 // Needed by evolution and breakpoint code | |
| 383 static inline void notice_modification() { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications; } | |
| 384 | |
| 385 // Verification | |
| 386 static void verify(); | |
| 387 | |
| 388 #ifdef ASSERT | |
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389 static bool is_internal_format(Symbol* class_name); |
| 0 | 390 #endif |
| 391 | |
| 392 // Verify class is in dictionary | |
| 393 static void verify_obj_klass_present(Handle obj, | |
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394 Symbol* class_name, |
| 0 | 395 Handle class_loader); |
| 396 | |
| 397 // Initialization | |
| 398 static void initialize(TRAPS); | |
| 399 | |
| 400 // Fast access to commonly used classes (preloaded) | |
| 401 static klassOop check_klass(klassOop k) { | |
| 402 assert(k != NULL, "preloaded klass not initialized"); | |
| 403 return k; | |
| 404 } | |
| 405 | |
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406 static klassOop check_klass_Pre(klassOop k) { return check_klass(k); } |
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407 static klassOop check_klass_Pre_JSR292(klassOop k) { return EnableInvokeDynamic ? check_klass(k) : k; } |
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408 static klassOop check_klass_Opt(klassOop k) { return k; } |
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409 static klassOop check_klass_Opt_Kernel(klassOop k) { return k; } //== Opt |
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410 static klassOop check_klass_Opt_Only_JDK15(klassOop k) { |
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411 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only"); |
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412 return k; |
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413 } |
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414 static klassOop check_klass_Opt_Only_JDK14NewRef(klassOop k) { |
| 0 | 415 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only"); |
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416 // despite the optional loading, if you use this it must be present: |
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417 return check_klass(k); |
| 0 | 418 } |
| 419 | |
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420 static bool initialize_wk_klass(WKID id, int init_opt, TRAPS); |
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421 static void initialize_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS); |
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422 static void initialize_wk_klasses_through(WKID end_id, WKID &start_id, TRAPS) { |
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423 int limit = (int)end_id + 1; |
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424 initialize_wk_klasses_until((WKID) limit, start_id, THREAD); |
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425 } |
| 0 | 426 |
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427 public: |
| 3938 | 428 #define WK_KLASS_DECLARE(name, symbol, option) \ |
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429 static klassOop name() { return check_klass_##option(_well_known_klasses[WK_KLASS_ENUM_NAME(name)]); } |
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430 WK_KLASSES_DO(WK_KLASS_DECLARE); |
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431 #undef WK_KLASS_DECLARE |
| 0 | 432 |
| 3938 | 433 static klassOop well_known_klass(WKID id) { |
| 434 assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob"); | |
| 435 return _well_known_klasses[id]; | |
| 436 } | |
| 437 | |
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438 // Local definition for direct access to the private array: |
| 147 | 439 #define WK_KLASS(name) _well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)] |
| 0 | 440 |
| 441 static klassOop box_klass(BasicType t) { | |
| 442 assert((uint)t < T_VOID+1, "range check"); | |
| 443 return check_klass(_box_klasses[t]); | |
| 444 } | |
| 445 static BasicType box_klass_type(klassOop k); // inverse of box_klass | |
| 446 | |
| 447 // methods returning lazily loaded klasses | |
| 448 // The corresponding method to load the class must be called before calling them. | |
| 449 static klassOop abstract_ownable_synchronizer_klass() { return check_klass(_abstract_ownable_synchronizer_klass); } | |
| 450 | |
| 451 static void load_abstract_ownable_synchronizer_klass(TRAPS); | |
| 452 | |
| 453 private: | |
| 454 // Tells whether ClassLoader.loadClassInternal is present | |
| 455 static bool has_loadClassInternal() { return _has_loadClassInternal; } | |
| 456 | |
| 457 public: | |
| 458 // Tells whether ClassLoader.checkPackageAccess is present | |
| 459 static bool has_checkPackageAccess() { return _has_checkPackageAccess; } | |
| 460 | |
| 1142 | 461 static bool Class_klass_loaded() { return WK_KLASS(Class_klass) != NULL; } |
| 462 static bool Cloneable_klass_loaded() { return WK_KLASS(Cloneable_klass) != NULL; } | |
| 0 | 463 |
| 464 // Returns default system loader | |
| 465 static oop java_system_loader(); | |
| 466 | |
| 467 // Compute the default system loader | |
| 468 static void compute_java_system_loader(TRAPS); | |
| 469 | |
| 470 private: | |
| 471 // Mirrors for primitive classes (created eagerly) | |
| 472 static oop check_mirror(oop m) { | |
| 473 assert(m != NULL, "mirror not initialized"); | |
| 474 return m; | |
| 475 } | |
| 476 | |
| 477 public: | |
| 478 // Note: java_lang_Class::primitive_type is the inverse of java_mirror | |
| 479 | |
| 480 // Check class loader constraints | |
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481 static bool add_loader_constraint(Symbol* name, Handle loader1, |
| 0 | 482 Handle loader2, TRAPS); |
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483 static char* check_signature_loaders(Symbol* signature, Handle loader1, |
| 0 | 484 Handle loader2, bool is_method, TRAPS); |
| 485 | |
| 710 | 486 // JSR 292 |
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487 // find the java.lang.invoke.MethodHandles::invoke method for a given signature |
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488 static methodOop find_method_handle_invoke(Symbol* name, |
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489 Symbol* signature, |
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490 KlassHandle accessing_klass, |
| 710 | 491 TRAPS); |
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492 // ask Java to compute a java.lang.invoke.MethodType object for a given signature |
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493 static Handle find_method_handle_type(Symbol* signature, |
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494 KlassHandle accessing_klass, |
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495 bool for_invokeGeneric, |
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496 bool& return_bcp_flag, |
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497 TRAPS); |
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498 // ask Java to compute a java.lang.invoke.MethodHandle object for a given CP entry |
| 1602 | 499 static Handle link_method_handle_constant(KlassHandle caller, |
| 500 int ref_kind, //e.g., JVM_REF_invokeVirtual | |
| 501 KlassHandle callee, | |
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502 Symbol* name, |
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503 Symbol* signature, |
| 1602 | 504 TRAPS); |
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505 // ask Java to create a dynamic call site, while linking an invokedynamic op |
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506 static Handle make_dynamic_call_site(Handle bootstrap_method, |
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507 // Callee information: |
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508 Symbol* name, |
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509 methodHandle signature_invoker, |
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510 Handle info, |
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511 // Caller information: |
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512 methodHandle caller_method, |
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513 int caller_bci, |
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514 TRAPS); |
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515 |
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516 // coordinate with Java about bootstrap methods |
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517 static Handle find_bootstrap_method(methodHandle caller_method, |
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518 int caller_bci, // N.B. must be an invokedynamic |
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519 int cache_index, // must be corresponding main_entry |
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520 Handle &argument_info_result, // static BSM arguments, if any |
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521 TRAPS); |
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522 |
| 0 | 523 // Utility for printing loader "name" as part of tracing constraints |
| 524 static const char* loader_name(oop loader) { | |
| 525 return ((loader) == NULL ? "<bootloader>" : | |
| 526 instanceKlass::cast((loader)->klass())->name()->as_C_string() ); | |
| 527 } | |
| 528 | |
| 529 // Record the error when the first attempt to resolve a reference from a constant | |
| 530 // pool entry to a class fails. | |
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531 static void add_resolution_error(constantPoolHandle pool, int which, Symbol* error); |
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532 static Symbol* find_resolution_error(constantPoolHandle pool, int which); |
| 0 | 533 |
| 534 private: | |
| 535 | |
| 536 enum Constants { | |
| 537 _loader_constraint_size = 107, // number of entries in constraint table | |
| 538 _resolution_error_size = 107, // number of entries in resolution error table | |
| 710 | 539 _invoke_method_size = 139, // number of entries in invoke method table |
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540 _nof_buckets = 1009, // number of buckets in hash table for placeholders |
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541 _old_default_sdsize = 1009, // backward compat for system dictionary size |
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542 _prime_array_size = 8, // array of primes for system dictionary size |
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543 _average_depth_goal = 3 // goal for lookup length |
| 0 | 544 }; |
| 545 | |
| 546 | |
| 547 // Static variables | |
| 548 | |
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549 // hashtable sizes for system dictionary to allow growth |
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550 // prime numbers for system dictionary size |
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551 static int _sdgeneration; |
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552 static const int _primelist[_prime_array_size]; |
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553 |
| 0 | 554 // Hashtable holding loaded classes. |
| 555 static Dictionary* _dictionary; | |
| 556 | |
| 557 // Hashtable holding placeholders for classes being loaded. | |
| 558 static PlaceholderTable* _placeholders; | |
| 559 | |
| 560 // Hashtable holding classes from the shared archive. | |
| 561 static Dictionary* _shared_dictionary; | |
| 562 | |
| 563 // Monotonically increasing counter which grows with | |
| 564 // _number_of_classes as well as hot-swapping and breakpoint setting | |
| 565 // and removal. | |
| 566 static int _number_of_modifications; | |
| 567 | |
| 568 // Lock object for system class loader | |
| 569 static oop _system_loader_lock_obj; | |
| 570 | |
| 571 // Constraints on class loaders | |
| 572 static LoaderConstraintTable* _loader_constraints; | |
| 573 | |
| 574 // Resolution errors | |
| 575 static ResolutionErrorTable* _resolution_errors; | |
| 576 | |
| 710 | 577 // Invoke methods (JSR 292) |
| 578 static SymbolPropertyTable* _invoke_method_table; | |
| 579 | |
| 0 | 580 public: |
| 581 // for VM_CounterDecay iteration support | |
| 582 friend class CounterDecay; | |
| 583 static klassOop try_get_next_class(); | |
| 584 | |
| 585 private: | |
| 586 static void validate_protection_domain(instanceKlassHandle klass, | |
| 587 Handle class_loader, | |
| 588 Handle protection_domain, TRAPS); | |
| 589 | |
| 590 friend class VM_PopulateDumpSharedSpace; | |
| 591 friend class TraversePlaceholdersClosure; | |
| 592 static Dictionary* dictionary() { return _dictionary; } | |
| 593 static Dictionary* shared_dictionary() { return _shared_dictionary; } | |
| 594 static PlaceholderTable* placeholders() { return _placeholders; } | |
| 595 static LoaderConstraintTable* constraints() { return _loader_constraints; } | |
| 596 static ResolutionErrorTable* resolution_errors() { return _resolution_errors; } | |
| 710 | 597 static SymbolPropertyTable* invoke_method_table() { return _invoke_method_table; } |
| 0 | 598 |
| 599 // Basic loading operations | |
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600 static klassOop resolve_instance_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
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601 static klassOop resolve_array_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
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602 static instanceKlassHandle handle_parallel_super_load(Symbol* class_name, Symbol* supername, Handle class_loader, Handle protection_domain, Handle lockObject, TRAPS); |
| 0 | 603 // Wait on SystemDictionary_lock; unlocks lockObject before |
| 604 // waiting; relocks lockObject with correct recursion count | |
| 605 // after waiting, but before reentering SystemDictionary_lock | |
| 606 // to preserve lock order semantics. | |
| 607 static void double_lock_wait(Handle lockObject, TRAPS); | |
| 608 static void define_instance_class(instanceKlassHandle k, TRAPS); | |
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609 static instanceKlassHandle find_or_define_instance_class(Symbol* class_name, |
| 0 | 610 Handle class_loader, |
| 611 instanceKlassHandle k, TRAPS); | |
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612 static instanceKlassHandle load_shared_class(Symbol* class_name, |
| 0 | 613 Handle class_loader, TRAPS); |
| 614 static instanceKlassHandle load_shared_class(instanceKlassHandle ik, | |
| 615 Handle class_loader, TRAPS); | |
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616 static instanceKlassHandle load_instance_class(Symbol* class_name, Handle class_loader, TRAPS); |
| 0 | 617 static Handle compute_loader_lock_object(Handle class_loader, TRAPS); |
| 618 static void check_loader_lock_contention(Handle loader_lock, TRAPS); | |
| 514 | 619 static bool is_parallelCapable(Handle class_loader); |
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620 static bool is_parallelDefine(Handle class_loader); |
| 0 | 621 |
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622 static klassOop find_shared_class(Symbol* class_name); |
| 0 | 623 |
| 624 // Setup link to hierarchy | |
| 625 static void add_to_hierarchy(instanceKlassHandle k, TRAPS); | |
| 626 | |
| 627 private: | |
| 628 // We pass in the hashtable index so we can calculate it outside of | |
| 629 // the SystemDictionary_lock. | |
| 630 | |
| 631 // Basic find on loaded classes | |
| 632 static klassOop find_class(int index, unsigned int hash, | |
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633 Symbol* name, Handle loader); |
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634 static klassOop find_class(Symbol* class_name, Handle class_loader); |
| 0 | 635 |
| 636 // Basic find on classes in the midst of being loaded | |
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637 static Symbol* find_placeholder(Symbol* name, Handle loader); |
| 0 | 638 |
| 639 // Updating entry in dictionary | |
| 640 // Add a completely loaded class | |
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641 static void add_klass(int index, Symbol* class_name, |
| 0 | 642 Handle class_loader, KlassHandle obj); |
| 643 | |
| 644 // Add a placeholder for a class being loaded | |
| 645 static void add_placeholder(int index, | |
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646 Symbol* class_name, |
| 0 | 647 Handle class_loader); |
| 648 static void remove_placeholder(int index, | |
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649 Symbol* class_name, |
| 0 | 650 Handle class_loader); |
| 651 | |
| 652 // Performs cleanups after resolve_super_or_fail. This typically needs | |
| 653 // to be called on failure. | |
| 654 // Won't throw, but can block. | |
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655 static void resolution_cleanups(Symbol* class_name, |
| 0 | 656 Handle class_loader, |
| 657 TRAPS); | |
| 658 | |
| 659 // Initialization | |
| 660 static void initialize_preloaded_classes(TRAPS); | |
| 661 | |
| 662 // Class loader constraints | |
| 663 static void check_constraints(int index, unsigned int hash, | |
| 664 instanceKlassHandle k, Handle loader, | |
| 665 bool defining, TRAPS); | |
| 666 static void update_dictionary(int d_index, unsigned int d_hash, | |
| 667 int p_index, unsigned int p_hash, | |
| 668 instanceKlassHandle k, Handle loader, TRAPS); | |
| 669 | |
| 670 // Variables holding commonly used klasses (preloaded) | |
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671 static klassOop _well_known_klasses[]; |
| 0 | 672 |
| 673 // Lazily loaded klasses | |
| 674 static volatile klassOop _abstract_ownable_synchronizer_klass; | |
| 675 | |
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676 // table of box klasses (int_klass, etc.) |
| 0 | 677 static klassOop _box_klasses[T_VOID+1]; |
| 678 | |
| 679 static oop _java_system_loader; | |
| 680 | |
| 681 static bool _has_loadClassInternal; | |
| 682 static bool _has_checkPackageAccess; | |
| 683 }; | |
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684 |
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685 class SystemDictionaryHandles : AllStatic { |
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686 public: |
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687 #define WK_KLASS_HANDLE_DECLARE(name, ignore_symbol, option) \ |
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688 static KlassHandle name() { \ |
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689 SystemDictionary::name(); \ |
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690 klassOop* loc = &SystemDictionary::_well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)]; \ |
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691 return KlassHandle(loc, true); \ |
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692 } |
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693 WK_KLASSES_DO(WK_KLASS_HANDLE_DECLARE); |
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694 #undef WK_KLASS_HANDLE_DECLARE |
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695 |
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696 static KlassHandle box_klass(BasicType t); |
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697 }; |
| 1972 | 698 |
| 699 #endif // SHARE_VM_CLASSFILE_SYSTEMDICTIONARY_HPP |