src/hotspot/share/classfile/systemDictionary.hpp
author goetz
Wed, 10 Apr 2019 08:15:45 +0200
branchJEP-8220715-NPE_messages
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parent 54439 d9b46b7de028
permissions -rw-r--r--
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/*
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 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_CLASSFILE_SYSTEMDICTIONARY_HPP
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#define SHARE_CLASSFILE_SYSTEMDICTIONARY_HPP
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#include "classfile/classLoaderData.hpp"
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#include "jvmci/systemDictionary_jvmci.hpp"
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#include "oops/objArrayOop.hpp"
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#include "oops/symbol.hpp"
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#include "runtime/java.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "runtime/reflectionUtils.hpp"
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#include "runtime/signature.hpp"
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#include "utilities/hashtable.hpp"
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// The dictionary in each ClassLoaderData stores all loaded classes, either
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// initiatied by its class loader or defined by its class loader:
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//
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//   class loader -> ClassLoaderData -> [class, protection domain set]
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//
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// Classes are loaded lazily. The default VM class loader is
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// represented as NULL.
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// The underlying data structure is an open hash table (Dictionary) per
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// ClassLoaderData with a fixed number of buckets. During loading the
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// class loader object is locked, (for the VM loader a private lock object is used).
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// The global SystemDictionary_lock is held for all additions into the ClassLoaderData
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// dictionaries.  TODO: fix lock granularity so that class loading can
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// be done concurrently, but only by different loaders.
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//
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// During loading a placeholder (name, loader) is temporarily placed in
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// a side data structure, and is used to detect ClassCircularityErrors
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// and to perform verification during GC.  A GC can occur in the midst
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// of class loading, as we call out to Java, have to take locks, etc.
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//
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// When class loading is finished, a new entry is added to the dictionary
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// of the class loader and the placeholder is removed. Note that the protection
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// domain field of the dictionary entry has not yet been filled in when
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// the "real" dictionary entry is created.
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//
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// Clients of this class who are interested in finding if a class has
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// been completely loaded -- not classes in the process of being loaded --
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// can read the dictionary unlocked. This is safe because
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//    - entries are only deleted at safepoints
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//    - readers cannot come to a safepoint while actively examining
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//         an entry  (an entry cannot be deleted from under a reader)
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//    - entries must be fully formed before they are available to concurrent
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//         readers (we must ensure write ordering)
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//
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// Note that placeholders are deleted at any time, as they are removed
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// when a class is completely loaded. Therefore, readers as well as writers
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// of placeholders must hold the SystemDictionary_lock.
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//
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class ClassFileStream;
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class Dictionary;
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class PlaceholderTable;
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class LoaderConstraintTable;
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template <MEMFLAGS F> class HashtableBucket;
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class ResolutionErrorTable;
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class SymbolPropertyTable;
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class ProtectionDomainCacheTable;
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class ProtectionDomainCacheEntry;
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class GCTimer;
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class OopStorage;
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#define WK_KLASS_ENUM_NAME(kname)    kname##_knum
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// Certain classes, such as java.lang.Object and java.lang.String,
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// are "well-known", in the sense that no class loader is allowed
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// to provide a different definition.
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//
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// Each well-known class has a short klass name (like object_klass),
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// and a vmSymbol name (like java_lang_Object).
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//
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// The order of these definitions is significant: the classes are
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// resolved during early VM start-up by resolve_well_known_classes
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// in this order. Changing the order may require careful restructuring
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// of the VM start-up sequence.
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//
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#define WK_KLASSES_DO(do_klass)                                                                                 \
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  /* well-known classes */                                                                                      \
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  do_klass(Object_klass,                                java_lang_Object                                      ) \
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  do_klass(String_klass,                                java_lang_String                                      ) \
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  do_klass(Class_klass,                                 java_lang_Class                                       ) \
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  do_klass(Cloneable_klass,                             java_lang_Cloneable                                   ) \
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  do_klass(ClassLoader_klass,                           java_lang_ClassLoader                                 ) \
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  do_klass(Serializable_klass,                          java_io_Serializable                                  ) \
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  do_klass(System_klass,                                java_lang_System                                      ) \
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  do_klass(Throwable_klass,                             java_lang_Throwable                                   ) \
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  do_klass(Error_klass,                                 java_lang_Error                                       ) \
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  do_klass(ThreadDeath_klass,                           java_lang_ThreadDeath                                 ) \
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  do_klass(Exception_klass,                             java_lang_Exception                                   ) \
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  do_klass(RuntimeException_klass,                      java_lang_RuntimeException                            ) \
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  do_klass(SecurityManager_klass,                       java_lang_SecurityManager                             ) \
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  do_klass(ProtectionDomain_klass,                      java_security_ProtectionDomain                        ) \
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  do_klass(AccessControlContext_klass,                  java_security_AccessControlContext                    ) \
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  do_klass(AccessController_klass,                      java_security_AccessController                        ) \
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  do_klass(SecureClassLoader_klass,                     java_security_SecureClassLoader                       ) \
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  do_klass(ClassNotFoundException_klass,                java_lang_ClassNotFoundException                      ) \
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  do_klass(NoClassDefFoundError_klass,                  java_lang_NoClassDefFoundError                        ) \
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  do_klass(LinkageError_klass,                          java_lang_LinkageError                                ) \
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  do_klass(ClassCastException_klass,                    java_lang_ClassCastException                          ) \
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  do_klass(ArrayStoreException_klass,                   java_lang_ArrayStoreException                         ) \
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  do_klass(VirtualMachineError_klass,                   java_lang_VirtualMachineError                         ) \
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  do_klass(OutOfMemoryError_klass,                      java_lang_OutOfMemoryError                            ) \
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  do_klass(StackOverflowError_klass,                    java_lang_StackOverflowError                          ) \
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  do_klass(IllegalMonitorStateException_klass,          java_lang_IllegalMonitorStateException                ) \
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  do_klass(Reference_klass,                             java_lang_ref_Reference                               ) \
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                                                                                                                \
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  /* ref klasses and set reference types */                                                                     \
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  do_klass(SoftReference_klass,                         java_lang_ref_SoftReference                           ) \
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  do_klass(WeakReference_klass,                         java_lang_ref_WeakReference                           ) \
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  do_klass(FinalReference_klass,                        java_lang_ref_FinalReference                          ) \
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  do_klass(PhantomReference_klass,                      java_lang_ref_PhantomReference                        ) \
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  do_klass(Finalizer_klass,                             java_lang_ref_Finalizer                               ) \
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                                                                                                                \
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  do_klass(Thread_klass,                                java_lang_Thread                                      ) \
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  do_klass(ThreadGroup_klass,                           java_lang_ThreadGroup                                 ) \
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  do_klass(Properties_klass,                            java_util_Properties                                  ) \
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  do_klass(Module_klass,                                java_lang_Module                                      ) \
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  do_klass(reflect_AccessibleObject_klass,              java_lang_reflect_AccessibleObject                    ) \
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  do_klass(reflect_Field_klass,                         java_lang_reflect_Field                               ) \
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  do_klass(reflect_Parameter_klass,                     java_lang_reflect_Parameter                           ) \
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  do_klass(reflect_Method_klass,                        java_lang_reflect_Method                              ) \
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  do_klass(reflect_Constructor_klass,                   java_lang_reflect_Constructor                         ) \
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                                                                                                                \
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  /* NOTE: needed too early in bootstrapping process to have checks based on JDK version */                     \
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  /* It's okay if this turns out to be NULL in non-1.4 JDKs. */                                                 \
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  do_klass(reflect_MagicAccessorImpl_klass,             reflect_MagicAccessorImpl                             ) \
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  do_klass(reflect_MethodAccessorImpl_klass,            reflect_MethodAccessorImpl                            ) \
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  do_klass(reflect_ConstructorAccessorImpl_klass,       reflect_ConstructorAccessorImpl                       ) \
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  do_klass(reflect_DelegatingClassLoader_klass,         reflect_DelegatingClassLoader                         ) \
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  do_klass(reflect_ConstantPool_klass,                  reflect_ConstantPool                                  ) \
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  do_klass(reflect_UnsafeStaticFieldAccessorImpl_klass, reflect_UnsafeStaticFieldAccessorImpl                 ) \
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  do_klass(reflect_CallerSensitive_klass,               reflect_CallerSensitive                               ) \
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  do_klass(reflect_NativeConstructorAccessorImpl_klass, reflect_NativeConstructorAccessorImpl                 ) \
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                                                                                                                \
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  /* support for dynamic typing; it's OK if these are NULL in earlier JDKs */                                   \
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  do_klass(DirectMethodHandle_klass,                    java_lang_invoke_DirectMethodHandle                   ) \
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  do_klass(MethodHandle_klass,                          java_lang_invoke_MethodHandle                         ) \
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  do_klass(VarHandle_klass,                             java_lang_invoke_VarHandle                            ) \
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  do_klass(MemberName_klass,                            java_lang_invoke_MemberName                           ) \
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  do_klass(ResolvedMethodName_klass,                    java_lang_invoke_ResolvedMethodName                   ) \
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  do_klass(MethodHandleNatives_klass,                   java_lang_invoke_MethodHandleNatives                  ) \
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  do_klass(LambdaForm_klass,                            java_lang_invoke_LambdaForm                           ) \
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  do_klass(MethodType_klass,                            java_lang_invoke_MethodType                           ) \
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  do_klass(BootstrapMethodError_klass,                  java_lang_BootstrapMethodError                        ) \
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  do_klass(CallSite_klass,                              java_lang_invoke_CallSite                             ) \
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  do_klass(Context_klass,                               java_lang_invoke_MethodHandleNatives_CallSiteContext  ) \
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  do_klass(ConstantCallSite_klass,                      java_lang_invoke_ConstantCallSite                     ) \
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  do_klass(MutableCallSite_klass,                       java_lang_invoke_MutableCallSite                      ) \
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  do_klass(VolatileCallSite_klass,                      java_lang_invoke_VolatileCallSite                     ) \
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  /* Note: MethodHandle must be first, and VolatileCallSite last in group */                                    \
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                                                                                                                \
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  do_klass(AssertionStatusDirectives_klass,             java_lang_AssertionStatusDirectives                   ) \
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  do_klass(StringBuffer_klass,                          java_lang_StringBuffer                                ) \
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  do_klass(StringBuilder_klass,                         java_lang_StringBuilder                               ) \
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  do_klass(UnsafeConstants_klass,                       jdk_internal_misc_UnsafeConstants                     ) \
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  do_klass(internal_Unsafe_klass,                       jdk_internal_misc_Unsafe                              ) \
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  do_klass(module_Modules_klass,                        jdk_internal_module_Modules                           ) \
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                                                                                                                \
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  /* support for CDS */                                                                                         \
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  do_klass(ByteArrayInputStream_klass,                  java_io_ByteArrayInputStream                          ) \
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  do_klass(URL_klass,                                   java_net_URL                                          ) \
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  do_klass(Jar_Manifest_klass,                          java_util_jar_Manifest                                ) \
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  do_klass(jdk_internal_loader_ClassLoaders_klass,      jdk_internal_loader_ClassLoaders                      ) \
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  do_klass(jdk_internal_loader_ClassLoaders_AppClassLoader_klass,      jdk_internal_loader_ClassLoaders_AppClassLoader) \
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  do_klass(jdk_internal_loader_ClassLoaders_PlatformClassLoader_klass, jdk_internal_loader_ClassLoaders_PlatformClassLoader) \
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  do_klass(CodeSource_klass,                            java_security_CodeSource                              ) \
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                                                                                                                \
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  do_klass(StackTraceElement_klass,                     java_lang_StackTraceElement                           ) \
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                                                                                                                \
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  /* It's okay if this turns out to be NULL in non-1.4 JDKs. */                                                 \
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  do_klass(nio_Buffer_klass,                            java_nio_Buffer                                       ) \
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                                                                                                                \
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  /* Stack Walking */                                                                                           \
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  do_klass(StackWalker_klass,                           java_lang_StackWalker                                 ) \
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  do_klass(AbstractStackWalker_klass,                   java_lang_StackStreamFactory_AbstractStackWalker      ) \
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  do_klass(StackFrameInfo_klass,                        java_lang_StackFrameInfo                              ) \
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  do_klass(LiveStackFrameInfo_klass,                    java_lang_LiveStackFrameInfo                          ) \
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                                                                                                                \
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  /* support for stack dump lock analysis */                                                                    \
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  do_klass(java_util_concurrent_locks_AbstractOwnableSynchronizer_klass, java_util_concurrent_locks_AbstractOwnableSynchronizer) \
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                                                                                                                \
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  /* boxing klasses */                                                                                          \
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  do_klass(Boolean_klass,                               java_lang_Boolean                                     ) \
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  do_klass(Character_klass,                             java_lang_Character                                   ) \
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  do_klass(Float_klass,                                 java_lang_Float                                       ) \
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  do_klass(Double_klass,                                java_lang_Double                                      ) \
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  do_klass(Byte_klass,                                  java_lang_Byte                                        ) \
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  do_klass(Short_klass,                                 java_lang_Short                                       ) \
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  do_klass(Integer_klass,                               java_lang_Integer                                     ) \
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  do_klass(Long_klass,                                  java_lang_Long                                        ) \
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                                                                                                                \
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  /* JVMCI classes. These are loaded on-demand. */                                                              \
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  JVMCI_WK_KLASSES_DO(do_klass)                                                                                 \
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                                                                                                                \
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  /*end*/
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class SystemDictionary : AllStatic {
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  friend class VMStructs;
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  friend class SystemDictionaryHandles;
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 public:
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  enum WKID {
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    NO_WKID = 0,
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    #define WK_KLASS_ENUM(name, symbol) WK_KLASS_ENUM_NAME(name), WK_KLASS_ENUM_NAME(symbol) = WK_KLASS_ENUM_NAME(name),
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    WK_KLASSES_DO(WK_KLASS_ENUM)
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    #undef WK_KLASS_ENUM
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    WKID_LIMIT,
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#if INCLUDE_JVMCI
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    FIRST_JVMCI_WKID = WK_KLASS_ENUM_NAME(JVMCI_klass),
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    LAST_JVMCI_WKID  = WK_KLASS_ENUM_NAME(Value_klass),
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#endif
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    FIRST_WKID = NO_WKID + 1
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  };
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  // Returns a class with a given class name and class loader.  Loads the
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  // class if needed. If not found a NoClassDefFoundError or a
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  // ClassNotFoundException is thrown, depending on the value on the
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  // throw_error flag.  For most uses the throw_error argument should be set
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  // to true.
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  static Klass* resolve_or_fail(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS);
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  // Convenient call for null loader and protection domain.
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  static Klass* resolve_or_fail(Symbol* class_name, bool throw_error, TRAPS);
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protected:
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  // handle error translation for resolve_or_null results
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  static Klass* handle_resolution_exception(Symbol* class_name, bool throw_error, Klass* klass, TRAPS);
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public:
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  // Returns a class with a given class name and class loader.
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  // Loads the class if needed. If not found NULL is returned.
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  static Klass* resolve_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS);
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  // Version with null loader and protection domain
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  static Klass* resolve_or_null(Symbol* class_name, TRAPS);
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  // Resolve a superclass or superinterface. Called from ClassFileParser,
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  // parse_interfaces, resolve_instance_class_or_null, load_shared_class
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  // "child_name" is the class whose super class or interface is being resolved.
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  static InstanceKlass* resolve_super_or_fail(Symbol* child_name,
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                                              Symbol* class_name,
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                                              Handle class_loader,
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                                              Handle protection_domain,
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                                              bool is_superclass,
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                                              TRAPS);
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  // Parse new stream. This won't update the dictionary or
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  // class hierarchy, simply parse the stream. Used by JVMTI RedefineClasses.
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  // Also used by Unsafe_DefineAnonymousClass
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  static InstanceKlass* parse_stream(Symbol* class_name,
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                                     Handle class_loader,
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                                     Handle protection_domain,
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                                     ClassFileStream* st,
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                                     TRAPS) {
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    return parse_stream(class_name,
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                        class_loader,
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                        protection_domain,
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                        st,
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                        NULL, // unsafe_anonymous_host
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                        NULL, // cp_patches
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                        THREAD);
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  }
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  static InstanceKlass* parse_stream(Symbol* class_name,
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                                     Handle class_loader,
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                                     Handle protection_domain,
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                                     ClassFileStream* st,
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                                     const InstanceKlass* unsafe_anonymous_host,
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                                     GrowableArray<Handle>* cp_patches,
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                                     TRAPS);
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  // Resolve from stream (called by jni_DefineClass and JVM_DefineClass)
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  static InstanceKlass* resolve_from_stream(Symbol* class_name,
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                                            Handle class_loader,
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                                            Handle protection_domain,
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                                            ClassFileStream* st,
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                                            TRAPS);
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  // Lookup an already loaded class. If not found NULL is returned.
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  static Klass* find(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS);
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  // Lookup an already loaded instance or array class.
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  // Do not make any queries to class loaders; consult only the cache.
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  // If not found NULL is returned.
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  static Klass* find_instance_or_array_klass(Symbol* class_name,
1
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                                               Handle class_loader,
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                                               Handle protection_domain,
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                                               TRAPS);
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  // Lookup an instance or array class that has already been loaded
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  // either into the given class loader, or else into another class
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  // loader that is constrained (via loader constraints) to produce
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  // a consistent class.  Do not take protection domains into account.
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   323
  // Do not make any queries to class loaders; consult only the cache.
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   324
  // Return NULL if the class is not found.
489c9b5090e2 Initial load
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   325
  //
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   326
  // This function is a strict superset of find_instance_or_array_klass.
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   327
  // This function (the unchecked version) makes a conservative prediction
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   328
  // of the result of the checked version, assuming successful lookup.
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   329
  // If both functions return non-null, they must return the same value.
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   330
  // Also, the unchecked version may sometimes be non-null where the
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   331
  // checked version is null.  This can occur in several ways:
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   332
  //   1. No query has yet been made to the class loader.
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   333
  //   2. The class loader was queried, but chose not to delegate.
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   334
  //   3. ClassLoader.checkPackageAccess rejected a proposed protection domain.
489c9b5090e2 Initial load
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parents:
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   335
  //   4. Loading was attempted, but there was a linkage error of some sort.
489c9b5090e2 Initial load
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   336
  // In all of these cases, the loader constraints on this type are
489c9b5090e2 Initial load
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   337
  // satisfied, and it is safe for classes in the given class loader
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   338
  // to manipulate strongly-typed values of the found class, subject
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   339
  // to local linkage and access checks.
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   340
  static Klass* find_constrained_instance_or_array_klass(Symbol* class_name,
1
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                                                           Handle class_loader,
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                                                           TRAPS);
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   343
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  static void classes_do(MetaspaceClosure* it);
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coleenp
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   345
  // Iterate over all methods in all klasses
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   346
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   347
  static void methods_do(void f(Method*));
1
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   348
489c9b5090e2 Initial load
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   349
  // Garbage collection support
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   350
489c9b5090e2 Initial load
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   351
  // Unload (that is, break root links to) all unmarked classes and
489c9b5090e2 Initial load
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   352
  // loaders.  Returns "true" iff something was unloaded.
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   353
  static bool do_unloading(GCTimer* gc_timer);
1
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   354
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   355
  // Applies "f->do_oop" to all root oops in the system dictionary.
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   356
  static void oops_do(OopClosure* f);
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   357
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   358
  // System loader lock
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   359
  static oop system_loader_lock()           { return _system_loader_lock_obj; }
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   360
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   361
  // Protection Domain Table
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   362
  static ProtectionDomainCacheTable* pd_cache_table() { return _pd_cache_table; }
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   363
1
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   364
public:
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   365
  // Printing
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   366
  static void print() { return print_on(tty); }
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   367
  static void print_on(outputStream* st);
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   368
  static void dump(outputStream* st, bool verbose);
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   369
489c9b5090e2 Initial load
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   370
  // Monotonically increasing counter which grows as classes are
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   371
  // loaded or modifications such as hot-swapping or setting/removing
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parents:
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   372
  // of breakpoints are performed
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   373
  static inline int number_of_modifications()     { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; }
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   374
  // Needed by evolution and breakpoint code
489c9b5090e2 Initial load
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   375
  static inline void notice_modification()        { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications;      }
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   376
489c9b5090e2 Initial load
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   377
  // Verification
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   378
  static void verify();
489c9b5090e2 Initial load
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   379
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   380
  // Initialization
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   381
  static void initialize(TRAPS);
489c9b5090e2 Initial load
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   382
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   383
  // Checked fast access to the well-known classes -- so that you don't try to use them
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
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diff changeset
   384
  // before they are resolved.
33602
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coleenp
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diff changeset
   385
  static InstanceKlass* check_klass(InstanceKlass* k) {
38708
8c27a4f8b242 8154589: assert(k != NULL) failed: preloaded klass not initialized
dholmes
parents: 37301
diff changeset
   386
    assert(k != NULL, "klass not loaded");
1
489c9b5090e2 Initial load
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parents:
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   387
    return k;
489c9b5090e2 Initial load
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parents:
diff changeset
   388
  }
489c9b5090e2 Initial load
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diff changeset
   389
52195
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parents: 51610
diff changeset
   390
  static bool resolve_wk_klass(WKID id, TRAPS);
51180
b7eb9cc56277 8203382: Rename SystemDictionary::initialize_wk_klass to resolve_wk_klass
iklam
parents: 50951
diff changeset
   391
  static void resolve_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS);
b7eb9cc56277 8203382: Rename SystemDictionary::initialize_wk_klass to resolve_wk_klass
iklam
parents: 50951
diff changeset
   392
  static void resolve_wk_klasses_through(WKID end_id, WKID &start_id, TRAPS) {
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   393
    int limit = (int)end_id + 1;
51180
b7eb9cc56277 8203382: Rename SystemDictionary::initialize_wk_klass to resolve_wk_klass
iklam
parents: 50951
diff changeset
   394
    resolve_wk_klasses_until((WKID) limit, start_id, THREAD);
379
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parents: 1
diff changeset
   395
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   396
379
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diff changeset
   397
public:
52195
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
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diff changeset
   398
  #define WK_KLASS_DECLARE(name, symbol) \
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 51610
diff changeset
   399
    static InstanceKlass* name() { return check_klass(_well_known_klasses[WK_KLASS_ENUM_NAME(name)]); } \
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 51610
diff changeset
   400
    static InstanceKlass** name##_addr() {                                                              \
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 51610
diff changeset
   401
      return &_well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)];                          \
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 51610
diff changeset
   402
    }                                                                                                   \
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 51610
diff changeset
   403
    static bool name##_is_loaded() {                                                                    \
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 51610
diff changeset
   404
      return _well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)] != NULL;                   \
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
   405
    }
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   406
  WK_KLASSES_DO(WK_KLASS_DECLARE);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   407
  #undef WK_KLASS_DECLARE
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
33602
16053580a684 8139163: InstanceKlass::cast passes through NULL
coleenp
parents: 33593
diff changeset
   409
  static InstanceKlass* well_known_klass(WKID id) {
10546
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 10514
diff changeset
   410
    assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob");
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 10514
diff changeset
   411
    return _well_known_klasses[id];
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 10514
diff changeset
   412
  }
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 10514
diff changeset
   413
33602
16053580a684 8139163: InstanceKlass::cast passes through NULL
coleenp
parents: 33593
diff changeset
   414
  static InstanceKlass** well_known_klass_addr(WKID id) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   415
    assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob");
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   416
    return &_well_known_klasses[id];
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   417
  }
46746
ea379ebb9447 8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents: 46742
diff changeset
   418
  static void well_known_klasses_do(MetaspaceClosure* it);
13728
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coleenp
parents: 13391
diff changeset
   419
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   420
  // Local definition for direct access to the private array:
394
c33507c3ac75 6701024: SAJDI functionality is broken
jrose
parents: 379
diff changeset
   421
  #define WK_KLASS(name) _well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)]
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
33602
16053580a684 8139163: InstanceKlass::cast passes through NULL
coleenp
parents: 33593
diff changeset
   423
  static InstanceKlass* box_klass(BasicType t) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   424
    assert((uint)t < T_VOID+1, "range check");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   425
    return check_klass(_box_klasses[t]);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   426
  }
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   427
  static BasicType box_klass_type(Klass* k);  // inverse of box_klass
52319
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
   428
#ifdef ASSERT
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
   429
  static bool is_well_known_klass(Klass* k) {
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
   430
    return is_well_known_klass(k->name());
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
   431
  }
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
   432
  static bool is_well_known_klass(Symbol* class_name);
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
   433
#endif
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
   435
protected:
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   436
  // Returns the class loader data to be used when looking up/updating the
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   437
  // system dictionary.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   438
  static ClassLoaderData *class_loader_data(Handle class_loader) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   439
    return ClassLoaderData::class_loader_data(class_loader());
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   440
  }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   441
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
  // Tells whether ClassLoader.checkPackageAccess is present
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
  static bool has_checkPackageAccess()      { return _has_checkPackageAccess; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
15102
0a86564e5f61 8004728: Add hotspot support for parameter reflection
coleenp
parents: 14588
diff changeset
   446
  static bool Parameter_klass_loaded()      { return WK_KLASS(reflect_Parameter_klass) != NULL; }
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
   447
  static bool Class_klass_loaded()          { return WK_KLASS(Class_klass) != NULL; }
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
   448
  static bool Cloneable_klass_loaded()      { return WK_KLASS(Cloneable_klass) != NULL; }
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   449
  static bool Object_klass_loaded()         { return WK_KLASS(Object_klass) != NULL; }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   450
  static bool ClassLoader_klass_loaded()    { return WK_KLASS(ClassLoader_klass) != NULL; }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
47614
0ecfd6c951a6 8185694: Replace SystemDictionaryShared::_java_platform_loader with SystemDictionary::is_platform_class_loader()
ccheung
parents: 47216
diff changeset
   452
  // Returns java system loader
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
  static oop java_system_loader();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
47614
0ecfd6c951a6 8185694: Replace SystemDictionaryShared::_java_platform_loader with SystemDictionary::is_platform_class_loader()
ccheung
parents: 47216
diff changeset
   455
  // Returns java platform loader
0ecfd6c951a6 8185694: Replace SystemDictionaryShared::_java_platform_loader with SystemDictionary::is_platform_class_loader()
ccheung
parents: 47216
diff changeset
   456
  static oop java_platform_loader();
0ecfd6c951a6 8185694: Replace SystemDictionaryShared::_java_platform_loader with SystemDictionary::is_platform_class_loader()
ccheung
parents: 47216
diff changeset
   457
0ecfd6c951a6 8185694: Replace SystemDictionaryShared::_java_platform_loader with SystemDictionary::is_platform_class_loader()
ccheung
parents: 47216
diff changeset
   458
  // Compute the java system and platform loaders
0ecfd6c951a6 8185694: Replace SystemDictionaryShared::_java_platform_loader with SystemDictionary::is_platform_class_loader()
ccheung
parents: 47216
diff changeset
   459
  static void compute_java_loaders(TRAPS);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   461
  // Register a new class loader
49348
fde3feaaa4ed 8198926: Move ClassLoaderData::_dependencies to ClassLoaderData::_handles
coleenp
parents: 49037
diff changeset
   462
  static ClassLoaderData* register_loader(Handle class_loader);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
   463
protected:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
  // Mirrors for primitive classes (created eagerly)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
  static oop check_mirror(oop m) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
    assert(m != NULL, "mirror not initialized");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
    return m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
  // Note:  java_lang_Class::primitive_type is the inverse of java_mirror
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
  // Check class loader constraints
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   474
  static bool add_loader_constraint(Symbol* name, Handle loader1,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
                                    Handle loader2, TRAPS);
16591
73047b0eb568 8009731: Confusing error message for loader constraint violation
acorn
parents: 16352
diff changeset
   476
  static Symbol* check_signature_loaders(Symbol* signature, Handle loader1,
73047b0eb568 8009731: Confusing error message for loader constraint violation
acorn
parents: 16352
diff changeset
   477
                                         Handle loader2, bool is_method, TRAPS);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   479
  // JSR 292
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   480
  // find a java.lang.invoke.MethodHandle.invoke* method for a given signature
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   481
  // (asks Java to compute it if necessary, except in a compiler thread)
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   482
  static methodHandle find_method_handle_invoker(Klass* klass,
36819
bca375d368ed 8149644: Integrate VarHandles
psandoz
parents: 35475
diff changeset
   483
                                                 Symbol* name,
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   484
                                                 Symbol* signature,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   485
                                                 Klass* accessing_klass,
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   486
                                                 Handle *appendix_result,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   487
                                                 TRAPS);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   488
  // for a given signature, find the internal MethodHandle method (linkTo* or invokeBasic)
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   489
  // (does not ask Java, since this is a low-level intrinsic defined by the JVM)
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   490
  static methodHandle find_method_handle_intrinsic(vmIntrinsics::ID iid,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   491
                                                   Symbol* signature,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   492
                                                   TRAPS);
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   493
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   494
  // compute java_mirror (java.lang.Class instance) for a type ("I", "[[B", "LFoo;", etc.)
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   495
  // Either the accessing_klass or the CL/PD can be non-null, but not both.
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   496
  static Handle    find_java_mirror_for_type(Symbol* signature,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   497
                                             Klass* accessing_klass,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   498
                                             Handle class_loader,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   499
                                             Handle protection_domain,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   500
                                             SignatureStream::FailureMode failure_mode,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   501
                                             TRAPS);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   502
  static Handle    find_java_mirror_for_type(Symbol* signature,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   503
                                             Klass* accessing_klass,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   504
                                             SignatureStream::FailureMode failure_mode,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   505
                                             TRAPS) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   506
    // callee will fill in CL/PD from AK, if they are needed
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   507
    return find_java_mirror_for_type(signature, accessing_klass, Handle(), Handle(),
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   508
                                     failure_mode, THREAD);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   509
  }
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   510
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   511
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   512
  // fast short-cut for the one-character case:
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   513
  static oop       find_java_mirror_for_type(char signature_char);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   514
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   515
  // find a java.lang.invoke.MethodType object for a given signature
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   516
  // (asks Java to compute it if necessary, except in a compiler thread)
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   517
  static Handle    find_method_handle_type(Symbol* signature,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   518
                                           Klass* accessing_klass,
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   519
                                           TRAPS);
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   520
48514
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 47774
diff changeset
   521
  // find a java.lang.Class object for a given signature
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 47774
diff changeset
   522
  static Handle    find_field_handle_type(Symbol* signature,
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 47774
diff changeset
   523
                                          Klass* accessing_klass,
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 47774
diff changeset
   524
                                          TRAPS);
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 47774
diff changeset
   525
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8675
diff changeset
   526
  // ask Java to compute a java.lang.invoke.MethodHandle object for a given CP entry
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   527
  static Handle    link_method_handle_constant(Klass* caller,
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
   528
                                               int ref_kind, //e.g., JVM_REF_invokeVirtual
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   529
                                               Klass* callee,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   530
                                               Symbol* name,
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   531
                                               Symbol* signature,
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
   532
                                               TRAPS);
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   533
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   534
  // ask Java to compute a constant by invoking a BSM given a Dynamic_info CP entry
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   535
  static Handle    link_dynamic_constant(Klass* caller,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   536
                                         int condy_index,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   537
                                         Handle bootstrap_specifier,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   538
                                         Symbol* name,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   539
                                         Symbol* type,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   540
                                         TRAPS);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   541
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   542
  // ask Java to create a dynamic call site, while linking an invokedynamic op
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   543
  static methodHandle find_dynamic_call_site_invoker(Klass* caller,
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48637
diff changeset
   544
                                                     int indy_index,
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   545
                                                     Handle bootstrap_method,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   546
                                                     Symbol* name,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   547
                                                     Symbol* type,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   548
                                                     Handle *appendix_result,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13195
diff changeset
   549
                                                     TRAPS);
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   550
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
  // Record the error when the first attempt to resolve a reference from a constant
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
  // pool entry to a class fails.
33593
60764a78fa5c 8140274: methodHandles and constantPoolHandles should be passed as const references
coleenp
parents: 33160
diff changeset
   553
  static void add_resolution_error(const constantPoolHandle& pool, int which, Symbol* error,
24334
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
   554
                                   Symbol* message);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   555
  static void delete_resolution_error(ConstantPool* pool);
33593
60764a78fa5c 8140274: methodHandles and constantPoolHandles should be passed as const references
coleenp
parents: 33160
diff changeset
   556
  static Symbol* find_resolution_error(const constantPoolHandle& pool, int which,
24334
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
   557
                                       Symbol** message);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46505
diff changeset
   559
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46505
diff changeset
   560
  static ProtectionDomainCacheEntry* cache_get(Handle protection_domain);
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46505
diff changeset
   561
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
   562
 protected:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
  enum Constants {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
    _loader_constraint_size = 107,                     // number of entries in constraint table
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
    _resolution_error_size  = 107,                     // number of entries in resolution error table
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   567
    _invoke_method_size     = 139,                     // number of entries in invoke method table
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46505
diff changeset
   568
    _placeholder_table_size = 1009                     // number of entries in hash table for placeholders
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46505
diff changeset
   572
  // Static tables owned by the SystemDictionary
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
  // Hashtable holding placeholders for classes being loaded.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
  static PlaceholderTable*       _placeholders;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
  // Monotonically increasing counter which grows with
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46505
diff changeset
   578
  // loading classes as well as hot-swapping and breakpoint setting
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
  // and removal.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
  static int                     _number_of_modifications;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
  // Lock object for system class loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
  static oop                     _system_loader_lock_obj;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
  // Constraints on class loaders
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
  static LoaderConstraintTable*  _loader_constraints;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
  // Resolution errors
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
  static ResolutionErrorTable*   _resolution_errors;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   591
  // Invoke methods (JSR 292)
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   592
  static SymbolPropertyTable*    _invoke_method_table;
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   593
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46505
diff changeset
   594
  // ProtectionDomain cache
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46505
diff changeset
   595
  static ProtectionDomainCacheTable*   _pd_cache_table;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
49738
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49480
diff changeset
   597
  // VM weak OopStorage object.
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49480
diff changeset
   598
  static OopStorage*             _vm_weak_oop_storage;
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49480
diff changeset
   599
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
   600
protected:
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   601
  static void validate_protection_domain(InstanceKlass* klass,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
                                         Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
                                         Handle protection_domain, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
  friend class VM_PopulateDumpSharedSpace;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
  friend class TraversePlaceholdersClosure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
  static PlaceholderTable*   placeholders() { return _placeholders; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
  static LoaderConstraintTable* constraints() { return _loader_constraints; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
  static ResolutionErrorTable* resolution_errors() { return _resolution_errors; }
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   610
  static SymbolPropertyTable* invoke_method_table() { return _invoke_method_table; }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
  // Basic loading operations
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51180
diff changeset
   613
  static InstanceKlass* resolve_instance_class_or_null_helper(Symbol* name,
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51180
diff changeset
   614
                                                              Handle class_loader,
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51180
diff changeset
   615
                                                              Handle protection_domain,
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51180
diff changeset
   616
                                                              TRAPS);
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51180
diff changeset
   617
  static InstanceKlass* resolve_instance_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   618
  static Klass* resolve_array_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS);
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   619
  static InstanceKlass* handle_parallel_super_load(Symbol* class_name, Symbol* supername, Handle class_loader, Handle protection_domain, Handle lockObject, TRAPS);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
  // Wait on SystemDictionary_lock; unlocks lockObject before
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
  // waiting; relocks lockObject with correct recursion count
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
  // after waiting, but before reentering SystemDictionary_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
  // to preserve lock order semantics.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
  static void double_lock_wait(Handle lockObject, TRAPS);
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   625
  static void define_instance_class(InstanceKlass* k, TRAPS);
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   626
  static InstanceKlass* find_or_define_instance_class(Symbol* class_name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
                                                Handle class_loader,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   628
                                                InstanceKlass* k, TRAPS);
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   629
  static bool is_shared_class_visible(Symbol* class_name, InstanceKlass* ik,
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 35475
diff changeset
   630
                                      Handle class_loader, TRAPS);
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   631
  static InstanceKlass* load_shared_class(InstanceKlass* ik,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   632
                                          Handle class_loader,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   633
                                          Handle protection_domain,
53884
1a7b57d02107 8218751: Do not store original classfiles inside the CDS archive
iklam
parents: 53746
diff changeset
   634
                                          const ClassFileStream *cfs,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   635
                                          TRAPS);
52335
6507eeb6f047 8203953: Rename SystemDictionary::load_shared_class(Symbol*, Handle, TRAPS) to load_shared_boot_class().
jiangli
parents: 52319
diff changeset
   636
  static InstanceKlass* load_shared_boot_class(Symbol* class_name,
6507eeb6f047 8203953: Rename SystemDictionary::load_shared_class(Symbol*, Handle, TRAPS) to load_shared_boot_class().
jiangli
parents: 52319
diff changeset
   637
                                               TRAPS);
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   638
  static InstanceKlass* load_instance_class(Symbol* class_name, Handle class_loader, TRAPS);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
  static Handle compute_loader_lock_object(Handle class_loader, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
  static void check_loader_lock_contention(Handle loader_lock, TRAPS);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   641
  static bool is_parallelCapable(Handle class_loader);
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 3820
diff changeset
   642
  static bool is_parallelDefine(Handle class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
16617
6235d2c7549f 7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents: 16352
diff changeset
   644
public:
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 41690
diff changeset
   645
  static bool is_system_class_loader(oop class_loader);
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 41690
diff changeset
   646
  static bool is_platform_class_loader(oop class_loader);
16617
6235d2c7549f 7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents: 16352
diff changeset
   647
48463
474cec233fb2 8154587: Resolution fails for default method named 'clone'
hseigel
parents: 47774
diff changeset
   648
  // Returns TRUE if the method is a non-public member of class java.lang.Object.
474cec233fb2 8154587: Resolution fails for default method named 'clone'
hseigel
parents: 47774
diff changeset
   649
  static bool is_nonpublic_Object_method(Method* m) {
474cec233fb2 8154587: Resolution fails for default method named 'clone'
hseigel
parents: 47774
diff changeset
   650
    assert(m != NULL, "Unexpected NULL Method*");
474cec233fb2 8154587: Resolution fails for default method named 'clone'
hseigel
parents: 47774
diff changeset
   651
    return !m->is_public() && m->method_holder() == SystemDictionary::Object_klass();
474cec233fb2 8154587: Resolution fails for default method named 'clone'
hseigel
parents: 47774
diff changeset
   652
  }
474cec233fb2 8154587: Resolution fails for default method named 'clone'
hseigel
parents: 47774
diff changeset
   653
49738
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49480
diff changeset
   654
  static void initialize_oop_storage();
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49480
diff changeset
   655
  static OopStorage* vm_weak_oop_storage();
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49480
diff changeset
   656
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
   657
protected:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
  // Setup link to hierarchy
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   659
  static void add_to_hierarchy(InstanceKlass* k, TRAPS);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   660
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
  // Basic find on loaded classes
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47761
diff changeset
   662
  static InstanceKlass* find_class(unsigned int hash,
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46505
diff changeset
   663
                                   Symbol* name, Dictionary* dictionary);
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   664
  static InstanceKlass* find_class(Symbol* class_name, ClassLoaderData* loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
489c9b5090e2 Initial load
duke
parents:
diff changeset
   666
  // Basic find on classes in the midst of being loaded
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   667
  static Symbol* find_placeholder(Symbol* name, ClassLoaderData* loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
489c9b5090e2 Initial load
duke
parents:
diff changeset
   669
  // Add a placeholder for a class being loaded
489c9b5090e2 Initial load
duke
parents:
diff changeset
   670
  static void add_placeholder(int index,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   671
                              Symbol* class_name,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   672
                              ClassLoaderData* loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   673
  static void remove_placeholder(int index,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   674
                                 Symbol* class_name,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   675
                                 ClassLoaderData* loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   676
489c9b5090e2 Initial load
duke
parents:
diff changeset
   677
  // Performs cleanups after resolve_super_or_fail. This typically needs
489c9b5090e2 Initial load
duke
parents:
diff changeset
   678
  // to be called on failure.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   679
  // Won't throw, but can block.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   680
  static void resolution_cleanups(Symbol* class_name,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   681
                                  ClassLoaderData* loader_data,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   682
                                  TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   683
52319
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
   684
  // Resolve well-known classes so they can be used like SystemDictionary::String_klass()
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
   685
  static void resolve_well_known_classes(TRAPS);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   686
489c9b5090e2 Initial load
duke
parents:
diff changeset
   687
  // Class loader constraints
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47761
diff changeset
   688
  static void check_constraints(unsigned int hash,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   689
                                InstanceKlass* k, Handle loader,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   690
                                bool defining, TRAPS);
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47761
diff changeset
   691
  static void update_dictionary(unsigned int d_hash,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   692
                                int p_index, unsigned int p_hash,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46271
diff changeset
   693
                                InstanceKlass* k, Handle loader,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   694
                                TRAPS);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   695
33602
16053580a684 8139163: InstanceKlass::cast passes through NULL
coleenp
parents: 33593
diff changeset
   696
  static InstanceKlass* _well_known_klasses[];
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   697
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   698
  // table of box klasses (int_klass, etc.)
33602
16053580a684 8139163: InstanceKlass::cast passes through NULL
coleenp
parents: 33593
diff changeset
   699
  static InstanceKlass* _box_klasses[T_VOID+1];
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   700
50152
b5023063346d 8189140: SystemDictionaryShared::initialize() should be renamed to be more meaningful
iklam
parents: 50063
diff changeset
   701
private:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   702
  static oop  _java_system_loader;
47614
0ecfd6c951a6 8185694: Replace SystemDictionaryShared::_java_platform_loader with SystemDictionary::is_platform_class_loader()
ccheung
parents: 47216
diff changeset
   703
  static oop  _java_platform_loader;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   704
489c9b5090e2 Initial load
duke
parents:
diff changeset
   705
  static bool _has_checkPackageAccess;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   706
};
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   707
53244
9807daeb47c4 8216167: Update include guards to reflect correct directories
coleenp
parents: 52514
diff changeset
   708
#endif // SHARE_CLASSFILE_SYSTEMDICTIONARY_HPP