hotspot/src/share/vm/classfile/systemDictionary.hpp
author jrose
Thu, 07 Apr 2011 17:02:30 -0700
changeset 9116 9bc44be338d6
parent 8883 5569135acca3
child 9967 9ddc1c490930
permissions -rw-r--r--
6981791: remove experimental code for JSR 292 Reviewed-by: twisti
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/*
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 * Copyright (c) 1997, 2011, 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_VM_CLASSFILE_SYSTEMDICTIONARY_HPP
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#define SHARE_VM_CLASSFILE_SYSTEMDICTIONARY_HPP
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#include "classfile/classFileStream.hpp"
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#include "classfile/classLoader.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/reflectionUtils.hpp"
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#include "utilities/hashtable.hpp"
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// The system dictionary stores all loaded classes and maps:
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//
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//   [class name,class loader] -> class   i.e.  [Symbol*,oop] -> klassOop
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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 with a fixed number
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// of buckets. During loading the loader object is locked, (for the VM loader
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// a private lock object is used). Class loading can thus be done concurrently,
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// 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 system
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// dictionary and the place holder is removed. Note that the protection
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// domain field of the system dictionary has not yet been filled in when
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// the "real" system 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 SystemDictionary 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 Dictionary;
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class PlaceholderTable;
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class LoaderConstraintTable;
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class HashtableBucket;
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class ResolutionErrorTable;
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class SymbolPropertyTable;
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// Certain classes are preloaded, such as java.lang.Object and java.lang.String.
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// They are all "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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// These klasses must all have names defined in vmSymbols.
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#define WK_KLASS_ENUM_NAME(kname)    kname##_knum
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// Each well-known class has a short klass name (like object_klass),
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// a vmSymbol name (like java_lang_Object), and a flag word
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// that makes some minor distinctions, like whether the klass
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// is preloaded, optional, release-specific, etc.
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// The order of these definitions is significant; it is the order in which
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// preloading is actually performed by initialize_preloaded_classes.
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#define WK_KLASSES_DO(template)                                               \
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  /* well-known classes */                                                    \
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  template(Object_klass,                 java_lang_Object,               Pre) \
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  template(String_klass,                 java_lang_String,               Pre) \
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  template(Class_klass,                  java_lang_Class,                Pre) \
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  template(Cloneable_klass,              java_lang_Cloneable,            Pre) \
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  template(ClassLoader_klass,            java_lang_ClassLoader,          Pre) \
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  template(Serializable_klass,           java_io_Serializable,           Pre) \
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  template(System_klass,                 java_lang_System,               Pre) \
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  template(Throwable_klass,              java_lang_Throwable,            Pre) \
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  template(Error_klass,                  java_lang_Error,                Pre) \
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  template(ThreadDeath_klass,            java_lang_ThreadDeath,          Pre) \
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  template(Exception_klass,              java_lang_Exception,            Pre) \
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  template(RuntimeException_klass,       java_lang_RuntimeException,     Pre) \
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  template(ProtectionDomain_klass,       java_security_ProtectionDomain, Pre) \
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  template(AccessControlContext_klass,   java_security_AccessControlContext, Pre) \
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  template(ClassNotFoundException_klass, java_lang_ClassNotFoundException, Pre) \
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  template(NoClassDefFoundError_klass,   java_lang_NoClassDefFoundError, Pre) \
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  template(LinkageError_klass,           java_lang_LinkageError,         Pre) \
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  template(ClassCastException_klass,     java_lang_ClassCastException,   Pre) \
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  template(ArrayStoreException_klass,    java_lang_ArrayStoreException,  Pre) \
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  template(VirtualMachineError_klass,    java_lang_VirtualMachineError,  Pre) \
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  template(OutOfMemoryError_klass,       java_lang_OutOfMemoryError,     Pre) \
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  template(StackOverflowError_klass,     java_lang_StackOverflowError,   Pre) \
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  template(IllegalMonitorStateException_klass, java_lang_IllegalMonitorStateException, Pre) \
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  template(Reference_klass,              java_lang_ref_Reference,        Pre) \
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                                                                              \
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  /* Preload ref klasses and set reference types */                           \
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  template(SoftReference_klass,          java_lang_ref_SoftReference,    Pre) \
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  template(WeakReference_klass,          java_lang_ref_WeakReference,    Pre) \
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  template(FinalReference_klass,         java_lang_ref_FinalReference,   Pre) \
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  template(PhantomReference_klass,       java_lang_ref_PhantomReference, Pre) \
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  template(Finalizer_klass,              java_lang_ref_Finalizer,        Pre) \
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                                                                              \
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  template(Thread_klass,                 java_lang_Thread,               Pre) \
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  template(ThreadGroup_klass,            java_lang_ThreadGroup,          Pre) \
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  template(Properties_klass,             java_util_Properties,           Pre) \
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  template(reflect_AccessibleObject_klass, java_lang_reflect_AccessibleObject, Pre) \
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  template(reflect_Field_klass,          java_lang_reflect_Field,        Pre) \
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  template(reflect_Method_klass,         java_lang_reflect_Method,       Pre) \
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  template(reflect_Constructor_klass,    java_lang_reflect_Constructor,  Pre) \
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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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  /* Universe::is_gte_jdk14x_version() is not set up by this point. */        \
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  /* It's okay if this turns out to be NULL in non-1.4 JDKs. */               \
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  template(reflect_MagicAccessorImpl_klass,          sun_reflect_MagicAccessorImpl,  Opt) \
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  template(reflect_MethodAccessorImpl_klass, sun_reflect_MethodAccessorImpl, Opt_Only_JDK14NewRef) \
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  template(reflect_ConstructorAccessorImpl_klass, sun_reflect_ConstructorAccessorImpl, Opt_Only_JDK14NewRef) \
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  template(reflect_DelegatingClassLoader_klass, sun_reflect_DelegatingClassLoader, Opt) \
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  template(reflect_ConstantPool_klass,  sun_reflect_ConstantPool,       Opt_Only_JDK15) \
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  template(reflect_UnsafeStaticFieldAccessorImpl_klass, sun_reflect_UnsafeStaticFieldAccessorImpl, Opt_Only_JDK15) \
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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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  template(MethodHandle_klass,           java_lang_invoke_MethodHandle,     Pre_JSR292) \
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  template(MemberName_klass,             java_lang_invoke_MemberName,       Pre_JSR292) \
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  template(MethodHandleNatives_klass,    java_lang_invoke_MethodHandleNatives, Pre_JSR292) \
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  template(AdapterMethodHandle_klass,    java_lang_invoke_AdapterMethodHandle, Pre_JSR292) \
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  template(BoundMethodHandle_klass,      java_lang_invoke_BoundMethodHandle, Pre_JSR292) \
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  template(DirectMethodHandle_klass,     java_lang_invoke_DirectMethodHandle, Pre_JSR292) \
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  template(MethodType_klass,             java_lang_invoke_MethodType,       Pre_JSR292) \
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  template(MethodTypeForm_klass,         java_lang_invoke_MethodTypeForm,   Pre_JSR292) \
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  template(WrongMethodTypeException_klass, java_lang_invoke_WrongMethodTypeException, Pre_JSR292) \
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  template(CallSite_klass,               java_lang_invoke_CallSite,         Pre_JSR292) \
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  /* Note: MethodHandle must be first, and CallSite last in group */          \
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                                                                              \
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  template(StringBuffer_klass,           java_lang_StringBuffer,         Pre) \
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  template(StringBuilder_klass,          java_lang_StringBuilder,        Pre) \
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                                                                              \
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  /* It's NULL in non-1.4 JDKs. */                                            \
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  template(StackTraceElement_klass,      java_lang_StackTraceElement,    Opt) \
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  /* Universe::is_gte_jdk14x_version() is not set up by this point. */        \
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  /* It's okay if this turns out to be NULL in non-1.4 JDKs. */               \
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  template(java_nio_Buffer_klass,        java_nio_Buffer,                Opt) \
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                                                                              \
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  /* If this class isn't present, it won't be referenced. */                  \
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  template(sun_misc_AtomicLongCSImpl_klass, sun_misc_AtomicLongCSImpl,   Opt) \
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                                                                              \
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  template(sun_jkernel_DownloadManager_klass, sun_jkernel_DownloadManager, Opt_Kernel) \
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                                                                              \
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  template(sun_misc_PostVMInitHook_klass, sun_misc_PostVMInitHook, Opt)       \
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                                                                              \
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  /* Preload boxing klasses */                                                \
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  template(Boolean_klass,                java_lang_Boolean,              Pre) \
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  template(Character_klass,              java_lang_Character,            Pre) \
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  template(Float_klass,                  java_lang_Float,                Pre) \
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  template(Double_klass,                 java_lang_Double,               Pre) \
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  template(Byte_klass,                   java_lang_Byte,                 Pre) \
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  template(Short_klass,                  java_lang_Short,                Pre) \
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  template(Integer_klass,                java_lang_Integer,              Pre) \
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  template(Long_klass,                   java_lang_Long,                 Pre) \
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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 CompactingPermGenGen;
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  friend class SystemDictionaryHandles;
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  NOT_PRODUCT(friend class instanceKlassKlass;)
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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, ignore_s, ignore_o) 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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    FIRST_WKID = NO_WKID + 1
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  };
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  enum InitOption {
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    Pre,                        // preloaded; error if not present
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    Pre_JSR292,                 // preloaded if EnableInvokeDynamic
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    // Order is significant.  Options before this point require resolve_or_fail.
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    // Options after this point will use resolve_or_null instead.
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    Opt,                        // preload tried; NULL if not present
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    Opt_Only_JDK14NewRef,       // preload tried; use only with NewReflection
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    Opt_Only_JDK15,             // preload tried; use only with JDK1.5+
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    Opt_Kernel,                 // preload tried only #ifdef KERNEL
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    OPTION_LIMIT,
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    CEIL_LG_OPTION_LIMIT = 4    // OPTION_LIMIT <= (1<<CEIL_LG_OPTION_LIMIT)
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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 klassOop 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 klassOop resolve_or_fail(Symbol* class_name, bool throw_error, TRAPS);
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private:
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  // handle error translation for resolve_or_null results
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  static klassOop handle_resolution_exception(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, KlassHandle klass_h, 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 klassOop 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 klassOop 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 klassOop 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 system dictionary or
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  // class hierarchy, simply parse the stream. Used by JVMTI RedefineClasses.
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  static klassOop 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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    KlassHandle nullHandle;
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    return parse_stream(class_name, class_loader, protection_domain, st, nullHandle, NULL, THREAD);
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  }
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  static klassOop 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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                               KlassHandle host_klass,
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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 klassOop resolve_from_stream(Symbol* class_name, Handle class_loader,
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                                      Handle protection_domain,
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                                      ClassFileStream* st, bool verify, TRAPS);
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  // Lookup an already loaded class. If not found NULL is returned.
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  static klassOop 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 klassOop find_instance_or_array_klass(Symbol* class_name,
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                                               Handle class_loader,
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                                               Handle protection_domain,
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                                               TRAPS);
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  // If the given name is known to vmSymbols, return the well-know klass:
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  static klassOop find_well_known_klass(Symbol* class_name);
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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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  // Do not make any queries to class loaders; consult only the cache.
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  // Return NULL if the class is not found.
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  //
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  // This function is a strict superset of find_instance_or_array_klass.
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  // This function (the unchecked version) makes a conservative prediction
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  // of the result of the checked version, assuming successful lookup.
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  // If both functions return non-null, they must return the same value.
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  // Also, the unchecked version may sometimes be non-null where the
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  // checked version is null.  This can occur in several ways:
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  //   1. No query has yet been made to the class loader.
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  //   2. The class loader was queried, but chose not to delegate.
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  //   3. ClassLoader.checkPackageAccess rejected a proposed protection domain.
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  //   4. Loading was attempted, but there was a linkage error of some sort.
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  // In all of these cases, the loader constraints on this type are
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  // satisfied, and it is safe for classes in the given class loader
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  // to manipulate strongly-typed values of the found class, subject
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  // to local linkage and access checks.
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  static klassOop find_constrained_instance_or_array_klass(Symbol* class_name,
1
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                                                           Handle class_loader,
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   313
                                                           TRAPS);
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   314
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   315
  // Iterate over all klasses in dictionary
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   316
  //   Just the classes from defining class loaders
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  static void classes_do(void f(klassOop));
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   318
  // Added for initialize_itable_for_klass to handle exceptions
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   319
  static void classes_do(void f(klassOop, TRAPS), TRAPS);
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   320
  //   All classes, and their class loaders
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   321
  static void classes_do(void f(klassOop, oop));
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   322
  //   All classes, and their class loaders
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   323
  //   (added for helpers that use HandleMarks and ResourceMarks)
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   324
  static void classes_do(void f(klassOop, oop, TRAPS), TRAPS);
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  // All entries in the placeholder table and their class loaders
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  static void placeholders_do(void f(Symbol*, oop));
1
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   327
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   328
  // Iterate over all methods in all klasses in dictionary
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   329
  static void methods_do(void f(methodOop));
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   330
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   331
  // Garbage collection support
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   332
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   333
  // This method applies "blk->do_oop" to all the pointers to "system"
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   334
  // classes and loaders.
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   335
  static void always_strong_oops_do(OopClosure* blk);
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   336
  static void always_strong_classes_do(OopClosure* blk);
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   337
  // This method applies "blk->do_oop" to all the placeholders.
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   338
  static void placeholders_do(OopClosure* blk);
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   339
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   340
  // Unload (that is, break root links to) all unmarked classes and
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   341
  // loaders.  Returns "true" iff something was unloaded.
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   342
  static bool do_unloading(BoolObjectClosure* is_alive);
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   343
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   344
  // Applies "f->do_oop" to all root oops in the system dictionary.
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   345
  static void oops_do(OopClosure* f);
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   346
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   347
  // System loader lock
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   348
  static oop system_loader_lock()           { return _system_loader_lock_obj; }
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   349
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   350
private:
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   351
  //    Traverses preloaded oops: various system classes.  These are
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   352
  //    guaranteed to be in the perm gen.
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   353
  static void preloaded_oops_do(OopClosure* f);
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   354
  static void lazily_loaded_oops_do(OopClosure* f);
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   355
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   356
public:
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   357
  // Sharing support.
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   358
  static void reorder_dictionary();
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parents:
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   359
  static void copy_buckets(char** top, char* end);
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parents:
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   360
  static void copy_table(char** top, char* end);
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parents:
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   361
  static void reverse();
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   362
  static void set_shared_dictionary(HashtableBucket* t, int length,
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   363
                                    int number_of_entries);
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parents:
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   364
  // Printing
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   365
  static void print()                   PRODUCT_RETURN;
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   366
  static void print_class_statistics()  PRODUCT_RETURN;
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   367
  static void print_method_statistics() PRODUCT_RETURN;
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   368
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parents:
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   369
  // Number of contained klasses
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parents:
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   370
  // This is both fully loaded classes and classes in the process
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parents:
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   371
  // of being loaded
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parents:
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   372
  static int number_of_classes();
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   373
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parents:
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   374
  // Monotonically increasing counter which grows as classes are
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parents:
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   375
  // loaded or modifications such as hot-swapping or setting/removing
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parents:
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   376
  // of breakpoints are performed
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parents:
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   377
  static inline int number_of_modifications()     { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; }
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parents:
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   378
  // Needed by evolution and breakpoint code
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parents:
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   379
  static inline void notice_modification()        { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications;      }
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   380
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parents:
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   381
  // Verification
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parents:
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   382
  static void verify();
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parents:
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   383
489c9b5090e2 Initial load
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parents:
diff changeset
   384
#ifdef ASSERT
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parents: 7900
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   385
  static bool is_internal_format(Symbol* class_name);
1
489c9b5090e2 Initial load
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parents:
diff changeset
   386
#endif
489c9b5090e2 Initial load
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parents:
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   387
489c9b5090e2 Initial load
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parents:
diff changeset
   388
  // Verify class is in dictionary
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parents:
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   389
  static void verify_obj_klass_present(Handle obj,
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96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   390
                                       Symbol* class_name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   391
                                       Handle class_loader);
489c9b5090e2 Initial load
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parents:
diff changeset
   392
489c9b5090e2 Initial load
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parents:
diff changeset
   393
  // Initialization
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parents:
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   394
  static void initialize(TRAPS);
489c9b5090e2 Initial load
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parents:
diff changeset
   395
489c9b5090e2 Initial load
duke
parents:
diff changeset
   396
  // Fast access to commonly used classes (preloaded)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   397
  static klassOop check_klass(klassOop k) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
    assert(k != NULL, "preloaded klass not initialized");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
    return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   400
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   402
  static klassOop check_klass_Pre(klassOop k) { return check_klass(k); }
8675
e9fef2a9bef7 6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents: 8076
diff changeset
   403
  static klassOop check_klass_Pre_JSR292(klassOop k) { return EnableInvokeDynamic ? check_klass(k) : k; }
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   404
  static klassOop check_klass_Opt(klassOop k) { return k; }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   405
  static klassOop check_klass_Opt_Kernel(klassOop k) { return k; } //== Opt
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   406
  static klassOop check_klass_Opt_Only_JDK15(klassOop k) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   407
    assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only");
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   408
    return k;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   409
  }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   410
  static klassOop check_klass_Opt_Only_JDK14NewRef(klassOop k) {
1
489c9b5090e2 Initial load
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parents:
diff changeset
   411
    assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only");
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   412
    // despite the optional loading, if you use this it must be present:
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   413
    return check_klass(k);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   416
  static bool initialize_wk_klass(WKID id, int init_opt, TRAPS);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   417
  static void initialize_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   418
  static void initialize_wk_klasses_through(WKID end_id, WKID &start_id, TRAPS) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   419
    int limit = (int)end_id + 1;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   420
    initialize_wk_klasses_until((WKID) limit, start_id, THREAD);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   421
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   423
public:
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   424
  #define WK_KLASS_DECLARE(name, ignore_symbol, option) \
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   425
    static klassOop name() { return check_klass_##option(_well_known_klasses[WK_KLASS_ENUM_NAME(name)]); }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   426
  WK_KLASSES_DO(WK_KLASS_DECLARE);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   427
  #undef WK_KLASS_DECLARE
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   429
  // Local definition for direct access to the private array:
394
c33507c3ac75 6701024: SAJDI functionality is broken
jrose
parents: 379
diff changeset
   430
  #define WK_KLASS(name) _well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)]
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
  static klassOop box_klass(BasicType t) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
    assert((uint)t < T_VOID+1, "range check");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
    return check_klass(_box_klasses[t]);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
  static BasicType box_klass_type(klassOop k);  // inverse of box_klass
489c9b5090e2 Initial load
duke
parents:
diff changeset
   437
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
  // methods returning lazily loaded klasses
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
  // The corresponding method to load the class must be called before calling them.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
  static klassOop abstract_ownable_synchronizer_klass() { return check_klass(_abstract_ownable_synchronizer_klass); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
  static void load_abstract_ownable_synchronizer_klass(TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
  // Tells whether ClassLoader.loadClassInternal is present
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
  static bool has_loadClassInternal()       { return _has_loadClassInternal; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
  // Tells whether ClassLoader.checkPackageAccess is present
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
  static bool has_checkPackageAccess()      { return _has_checkPackageAccess; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
   452
  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
   453
  static bool Cloneable_klass_loaded()      { return WK_KLASS(Cloneable_klass) != NULL; }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
  // Returns default system loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
  static oop java_system_loader();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
  // Compute the default system loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
  static void compute_java_system_loader(TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
  // Mirrors for primitive classes (created eagerly)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
  static oop check_mirror(oop m) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
    assert(m != NULL, "mirror not initialized");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
    return m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
  // Note:  java_lang_Class::primitive_type is the inverse of java_mirror
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
  // Check class loader constraints
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   472
  static bool add_loader_constraint(Symbol* name, Handle loader1,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
                                    Handle loader2, TRAPS);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   474
  static char* check_signature_loaders(Symbol* signature, Handle loader1,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
                                       Handle loader2, bool is_method, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   477
  // JSR 292
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8675
diff changeset
   478
  // find the java.lang.invoke.MethodHandles::invoke method for a given signature
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   479
  static methodOop find_method_handle_invoke(Symbol* name,
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   480
                                             Symbol* signature,
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
   481
                                             KlassHandle accessing_klass,
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   482
                                             TRAPS);
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8675
diff changeset
   483
  // ask Java to compute a java.lang.invoke.MethodType object for a given signature
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   484
  static Handle    find_method_handle_type(Symbol* signature,
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
   485
                                           KlassHandle accessing_klass,
6463
f4362c8da849 6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents: 6062
diff changeset
   486
                                           bool for_invokeGeneric,
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
   487
                                           bool& return_bcp_flag,
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   488
                                           TRAPS);
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8675
diff changeset
   489
  // ask Java to compute a java.lang.invoke.MethodHandle object for a given CP entry
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
   490
  static Handle    link_method_handle_constant(KlassHandle caller,
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
   491
                                               int ref_kind, //e.g., JVM_REF_invokeVirtual
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
   492
                                               KlassHandle callee,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   493
                                               Symbol* name,
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   494
                                               Symbol* signature,
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
   495
                                               TRAPS);
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   496
  // ask Java to create a dynamic call site, while linking an invokedynamic op
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   497
  static Handle    make_dynamic_call_site(Handle bootstrap_method,
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   498
                                          // Callee information:
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   499
                                          Symbol* name,
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   500
                                          methodHandle signature_invoker,
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   501
                                          Handle info,
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   502
                                          // Caller information:
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   503
                                          methodHandle caller_method,
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   504
                                          int caller_bci,
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   505
                                          TRAPS);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   506
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   507
  // coordinate with Java about bootstrap methods
6062
bab93afe9df7 6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents: 5882
diff changeset
   508
  static Handle    find_bootstrap_method(methodHandle caller_method,
bab93afe9df7 6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents: 5882
diff changeset
   509
                                         int caller_bci,  // N.B. must be an invokedynamic
bab93afe9df7 6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents: 5882
diff changeset
   510
                                         int cache_index, // must be corresponding main_entry
7114
65d21c4c6337 6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents: 6463
diff changeset
   511
                                         Handle &argument_info_result, // static BSM arguments, if any
6062
bab93afe9df7 6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents: 5882
diff changeset
   512
                                         TRAPS);
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   513
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
  // Utility for printing loader "name" as part of tracing constraints
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
  static const char* loader_name(oop loader) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
    return ((loader) == NULL ? "<bootloader>" :
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
            instanceKlass::cast((loader)->klass())->name()->as_C_string() );
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
  // Record the error when the first attempt to resolve a reference from a constant
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
  // pool entry to a class fails.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   522
  static void add_resolution_error(constantPoolHandle pool, int which, Symbol* error);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   523
  static Symbol* find_resolution_error(constantPoolHandle pool, int which);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
  enum Constants {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
    _loader_constraint_size = 107,                     // number of entries in constraint table
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
    _resolution_error_size  = 107,                     // number of entries in resolution error table
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   530
    _invoke_method_size     = 139,                     // number of entries in invoke method table
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
    _nof_buckets            = 1009                     // number of buckets in hash table
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
  // Static variables
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
  // Hashtable holding loaded classes.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
  static Dictionary*            _dictionary;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
  // Hashtable holding placeholders for classes being loaded.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
  static PlaceholderTable*       _placeholders;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
  // Hashtable holding classes from the shared archive.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
  static Dictionary*             _shared_dictionary;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
  // Monotonically increasing counter which grows with
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
  // _number_of_classes as well as hot-swapping and breakpoint setting
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
  // and removal.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
  static int                     _number_of_modifications;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
  // Lock object for system class loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
  static oop                     _system_loader_lock_obj;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
  // Constraints on class loaders
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
  static LoaderConstraintTable*  _loader_constraints;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
  // Resolution errors
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
  static ResolutionErrorTable*   _resolution_errors;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   560
  // Invoke methods (JSR 292)
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   561
  static SymbolPropertyTable*    _invoke_method_table;
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   562
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
  // for VM_CounterDecay iteration support
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
  friend class CounterDecay;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
  static klassOop try_get_next_class();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
  static void validate_protection_domain(instanceKlassHandle klass,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
                                         Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
                                         Handle protection_domain, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
  friend class VM_PopulateDumpSharedSpace;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
  friend class TraversePlaceholdersClosure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
  static Dictionary*         dictionary() { return _dictionary; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
  static Dictionary*         shared_dictionary() { return _shared_dictionary; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
  static PlaceholderTable*   placeholders() { return _placeholders; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   578
  static LoaderConstraintTable* constraints() { return _loader_constraints; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
  static ResolutionErrorTable* resolution_errors() { return _resolution_errors; }
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   580
  static SymbolPropertyTable* invoke_method_table() { return _invoke_method_table; }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
  // Basic loading operations
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   583
  static klassOop resolve_instance_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   584
  static klassOop resolve_array_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   585
  static instanceKlassHandle 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
   586
  // Wait on SystemDictionary_lock; unlocks lockObject before
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
  // waiting; relocks lockObject with correct recursion count
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
  // after waiting, but before reentering SystemDictionary_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
  // to preserve lock order semantics.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
  static void double_lock_wait(Handle lockObject, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
  static void define_instance_class(instanceKlassHandle k, TRAPS);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   592
  static instanceKlassHandle find_or_define_instance_class(Symbol* class_name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
                                                Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
                                                instanceKlassHandle k, TRAPS);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   595
  static instanceKlassHandle load_shared_class(Symbol* class_name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
                                               Handle class_loader, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
  static instanceKlassHandle load_shared_class(instanceKlassHandle ik,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
                                               Handle class_loader, TRAPS);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   599
  static instanceKlassHandle load_instance_class(Symbol* class_name, Handle class_loader, TRAPS);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
  static Handle compute_loader_lock_object(Handle class_loader, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
  static void check_loader_lock_contention(Handle loader_lock, TRAPS);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   602
  static bool is_parallelCapable(Handle class_loader);
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 3820
diff changeset
   603
  static bool is_parallelDefine(Handle class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   605
  static klassOop find_shared_class(Symbol* class_name);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
  // Setup link to hierarchy
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
  static void add_to_hierarchy(instanceKlassHandle k, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
  // We pass in the hashtable index so we can calculate it outside of
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
  // the SystemDictionary_lock.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
  // Basic find on loaded classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
  static klassOop find_class(int index, unsigned int hash,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   616
                             Symbol* name, Handle loader);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   617
  static klassOop find_class(Symbol* class_name, Handle class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
  // Basic find on classes in the midst of being loaded
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   620
  static Symbol* find_placeholder(Symbol* name, Handle loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
  // Updating entry in dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
  // Add a completely loaded class
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   624
  static void add_klass(int index, Symbol* class_name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
                        Handle class_loader, KlassHandle obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
  // Add a placeholder for a class being loaded
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
  static void add_placeholder(int index,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   629
                              Symbol* class_name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
                              Handle class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
  static void remove_placeholder(int index,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   632
                                 Symbol* class_name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
                                 Handle class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
  // Performs cleanups after resolve_super_or_fail. This typically needs
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
  // to be called on failure.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
  // Won't throw, but can block.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7900
diff changeset
   638
  static void resolution_cleanups(Symbol* class_name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
                                  Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
                                  TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
  // Initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
  static void initialize_preloaded_classes(TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
  // Class loader constraints
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
  static void check_constraints(int index, unsigned int hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
                                instanceKlassHandle k, Handle loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
                                bool defining, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
  static void update_dictionary(int d_index, unsigned int d_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
                                int p_index, unsigned int p_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
                                instanceKlassHandle k, Handle loader, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
489c9b5090e2 Initial load
duke
parents:
diff changeset
   653
  // Variables holding commonly used klasses (preloaded)
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   654
  static klassOop _well_known_klasses[];
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
  // Lazily loaded klasses
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
  static volatile klassOop _abstract_ownable_synchronizer_klass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   659
  // table of box klasses (int_klass, etc.)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   660
  static klassOop _box_klasses[T_VOID+1];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
  static oop  _java_system_loader;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
  static bool _has_loadClassInternal;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
  static bool _has_checkPackageAccess;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   666
};
2332
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class SystemDictionaryHandles : AllStatic {
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public:
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  #define WK_KLASS_HANDLE_DECLARE(name, ignore_symbol, option) \
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    static KlassHandle name() { \
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      SystemDictionary::name(); \
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      klassOop* loc = &SystemDictionary::_well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)]; \
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      return KlassHandle(loc, true); \
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    }
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  WK_KLASSES_DO(WK_KLASS_HANDLE_DECLARE);
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  #undef WK_KLASS_HANDLE_DECLARE
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  static KlassHandle box_klass(BasicType t);
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};
7397
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#endif // SHARE_VM_CLASSFILE_SYSTEMDICTIONARY_HPP