hotspot/src/share/vm/classfile/systemDictionary.hpp
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Thu, 27 May 2010 19:08:38 -0700
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6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
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/*
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 * Copyright (c) 1997, 2010, 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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// The system dictionary stores all loaded classes and maps:
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//
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//   [class name,class loader] -> class   i.e.  [symbolOop,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_dyn_MethodHandle,          Opt) \
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  template(MemberName_klass,             sun_dyn_MemberName,             Opt) \
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  template(MethodHandleImpl_klass,       sun_dyn_MethodHandleImpl,       Opt) \
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  template(MethodHandleNatives_klass,    sun_dyn_MethodHandleNatives,    Opt) \
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  template(AdapterMethodHandle_klass,    sun_dyn_AdapterMethodHandle,    Opt) \
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  template(BoundMethodHandle_klass,      sun_dyn_BoundMethodHandle,      Opt) \
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  template(DirectMethodHandle_klass,     sun_dyn_DirectMethodHandle,     Opt) \
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  template(MethodType_klass,             java_dyn_MethodType,            Opt) \
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  template(MethodTypeForm_klass,         java_dyn_MethodTypeForm,        Opt) \
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  template(WrongMethodTypeException_klass, java_dyn_WrongMethodTypeException, Opt) \
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  template(Linkage_klass,                java_dyn_Linkage,               Opt) \
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  template(CallSite_klass,               java_dyn_CallSite,              Opt) \
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  template(InvokeDynamic_klass,          java_dyn_InvokeDynamic,         Opt) \
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  /* Note: MethodHandle must be first, and InvokeDynamic 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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  /* 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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    // 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(symbolHandle 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(symbolHandle 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(symbolHandle 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(symbolHandle 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(symbolHandle 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(symbolHandle child_name,
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                                        symbolHandle 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(symbolHandle 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(symbolHandle 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(symbolHandle 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(symbolHandle 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(symbolHandle 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(symbolOop 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(symbolHandle class_name,
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                                                           Handle class_loader,
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                                                           TRAPS);
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  // Iterate over all klasses in dictionary
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  //   Just the classes from defining class loaders
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  static void classes_do(void f(klassOop));
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  // Added for initialize_itable_for_klass to handle exceptions
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  static void classes_do(void f(klassOop, TRAPS), TRAPS);
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  //   All classes, and their class loaders
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  static void classes_do(void f(klassOop, oop));
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  //   All classes, and their class loaders
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  //   (added for helpers that use HandleMarks and ResourceMarks)
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  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(symbolOop, oop));
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  // Iterate over all methods in all klasses in dictionary
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  static void methods_do(void f(methodOop));
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  // Garbage collection support
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diff changeset
   322
  // This method applies "blk->do_oop" to all the pointers to "system"
489c9b5090e2 Initial load
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parents:
diff changeset
   323
  // classes and loaders.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   324
  static void always_strong_oops_do(OopClosure* blk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   325
  static void always_strong_classes_do(OopClosure* blk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   326
  // This method applies "blk->do_oop" to all the placeholders.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   327
  static void placeholders_do(OopClosure* blk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   328
489c9b5090e2 Initial load
duke
parents:
diff changeset
   329
  // Unload (that is, break root links to) all unmarked classes and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   330
  // loaders.  Returns "true" iff something was unloaded.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   331
  static bool do_unloading(BoolObjectClosure* is_alive);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   332
489c9b5090e2 Initial load
duke
parents:
diff changeset
   333
  // Applies "f->do_oop" to all root oops in the system dictionary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   334
  static void oops_do(OopClosure* f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   335
489c9b5090e2 Initial load
duke
parents:
diff changeset
   336
  // System loader lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   337
  static oop system_loader_lock()           { return _system_loader_lock_obj; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   338
489c9b5090e2 Initial load
duke
parents:
diff changeset
   339
private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   340
  //    Traverses preloaded oops: various system classes.  These are
489c9b5090e2 Initial load
duke
parents:
diff changeset
   341
  //    guaranteed to be in the perm gen.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   342
  static void preloaded_oops_do(OopClosure* f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   343
  static void lazily_loaded_oops_do(OopClosure* f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   344
489c9b5090e2 Initial load
duke
parents:
diff changeset
   345
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   346
  // Sharing support.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   347
  static void reorder_dictionary();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   348
  static void copy_buckets(char** top, char* end);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   349
  static void copy_table(char** top, char* end);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   350
  static void reverse();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   351
  static void set_shared_dictionary(HashtableBucket* t, int length,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   352
                                    int number_of_entries);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   353
  // Printing
489c9b5090e2 Initial load
duke
parents:
diff changeset
   354
  static void print()                   PRODUCT_RETURN;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   355
  static void print_class_statistics()  PRODUCT_RETURN;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   356
  static void print_method_statistics() PRODUCT_RETURN;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   357
489c9b5090e2 Initial load
duke
parents:
diff changeset
   358
  // Number of contained klasses
489c9b5090e2 Initial load
duke
parents:
diff changeset
   359
  // This is both fully loaded classes and classes in the process
489c9b5090e2 Initial load
duke
parents:
diff changeset
   360
  // of being loaded
489c9b5090e2 Initial load
duke
parents:
diff changeset
   361
  static int number_of_classes();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   362
489c9b5090e2 Initial load
duke
parents:
diff changeset
   363
  // Monotonically increasing counter which grows as classes are
489c9b5090e2 Initial load
duke
parents:
diff changeset
   364
  // loaded or modifications such as hot-swapping or setting/removing
489c9b5090e2 Initial load
duke
parents:
diff changeset
   365
  // of breakpoints are performed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   366
  static inline int number_of_modifications()     { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   367
  // Needed by evolution and breakpoint code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   368
  static inline void notice_modification()        { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications;      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   369
489c9b5090e2 Initial load
duke
parents:
diff changeset
   370
  // Verification
489c9b5090e2 Initial load
duke
parents:
diff changeset
   371
  static void verify();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   372
489c9b5090e2 Initial load
duke
parents:
diff changeset
   373
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   374
  static bool is_internal_format(symbolHandle class_name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   375
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   376
489c9b5090e2 Initial load
duke
parents:
diff changeset
   377
  // Verify class is in dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
   378
  static void verify_obj_klass_present(Handle obj,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   379
                                       symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   380
                                       Handle class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   381
489c9b5090e2 Initial load
duke
parents:
diff changeset
   382
  // Initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
   383
  static void initialize(TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   384
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
  // Fast access to commonly used classes (preloaded)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   386
  static klassOop check_klass(klassOop k) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   387
    assert(k != NULL, "preloaded klass not initialized");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   388
    return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   389
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   390
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   391
  static klassOop check_klass_Pre(klassOop k) { return check_klass(k); }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   392
  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
   393
  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
   394
  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
   395
    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
   396
    return k;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   397
  }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   398
  static klassOop check_klass_Opt_Only_JDK14NewRef(klassOop k) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
    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
   400
    // 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
   401
    return check_klass(k);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   404
  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
   405
  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
   406
  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
   407
    int limit = (int)end_id + 1;
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   408
    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
   409
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   411
public:
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   412
  #define WK_KLASS_DECLARE(name, ignore_symbol, option) \
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   413
    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
   414
  WK_KLASSES_DO(WK_KLASS_DECLARE);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   415
  #undef WK_KLASS_DECLARE
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   416
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   417
  // Local definition for direct access to the private array:
394
c33507c3ac75 6701024: SAJDI functionality is broken
jrose
parents: 379
diff changeset
   418
  #define WK_KLASS(name) _well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)]
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   419
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
  static klassOop box_klass(BasicType t) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
    assert((uint)t < T_VOID+1, "range check");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
    return check_klass(_box_klasses[t]);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   424
  static BasicType box_klass_type(klassOop k);  // inverse of box_klass
489c9b5090e2 Initial load
duke
parents:
diff changeset
   425
489c9b5090e2 Initial load
duke
parents:
diff changeset
   426
  // methods returning lazily loaded klasses
489c9b5090e2 Initial load
duke
parents:
diff changeset
   427
  // The corresponding method to load the class must be called before calling them.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
  static klassOop abstract_ownable_synchronizer_klass() { return check_klass(_abstract_ownable_synchronizer_klass); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   429
489c9b5090e2 Initial load
duke
parents:
diff changeset
   430
  static void load_abstract_ownable_synchronizer_klass(TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
  // Tells whether ClassLoader.loadClassInternal is present
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
  static bool has_loadClassInternal()       { return _has_loadClassInternal; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   437
  // Tells whether ClassLoader.checkPackageAccess is present
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
  static bool has_checkPackageAccess()      { return _has_checkPackageAccess; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
   440
  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
   441
  static bool Cloneable_klass_loaded()      { return WK_KLASS(Cloneable_klass) != NULL; }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
  // Returns default system loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
  static oop java_system_loader();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
  // Compute the default system loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
  static void compute_java_system_loader(TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
  // Mirrors for primitive classes (created eagerly)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
  static oop check_mirror(oop m) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
    assert(m != NULL, "mirror not initialized");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
    return m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
  // Note:  java_lang_Class::primitive_type is the inverse of java_mirror
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
  // Check class loader constraints
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
  static bool add_loader_constraint(symbolHandle name, Handle loader1,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
                                    Handle loader2, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
  static char* check_signature_loaders(symbolHandle signature, Handle loader1,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
                                       Handle loader2, bool is_method, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   465
  // JSR 292
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   466
  // find the java.dyn.MethodHandles::invoke method for a given signature
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   467
  static methodOop find_method_handle_invoke(symbolHandle name,
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   468
                                             symbolHandle signature,
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
   469
                                             KlassHandle accessing_klass,
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   470
                                             TRAPS);
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   471
  // ask Java to compute a java.dyn.MethodType object for a given signature
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   472
  static Handle    find_method_handle_type(symbolHandle signature,
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
   473
                                           KlassHandle accessing_klass,
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
   474
                                           bool& return_bcp_flag,
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   475
                                           TRAPS);
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   476
  // 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
   477
  static Handle    make_dynamic_call_site(Handle bootstrap_method,
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   478
                                          // Callee information:
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   479
                                          symbolHandle name,
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   480
                                          methodHandle signature_invoker,
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   481
                                          Handle info,
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   482
                                          // Caller information:
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   483
                                          methodHandle caller_method,
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   484
                                          int caller_bci,
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   485
                                          TRAPS);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   486
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   487
  // coordinate with Java about bootstrap methods
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 4581
diff changeset
   488
  static Handle    find_bootstrap_method(KlassHandle caller, TRAPS);
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
   489
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
  // Utility for printing loader "name" as part of tracing constraints
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
  static const char* loader_name(oop loader) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
    return ((loader) == NULL ? "<bootloader>" :
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
            instanceKlass::cast((loader)->klass())->name()->as_C_string() );
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
  // Record the error when the first attempt to resolve a reference from a constant
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
  // pool entry to a class fails.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
  static void add_resolution_error(constantPoolHandle pool, int which, symbolHandle error);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
  static symbolOop find_resolution_error(constantPoolHandle pool, int which);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
  enum Constants {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
    _loader_constraint_size = 107,                     // number of entries in constraint table
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
    _resolution_error_size  = 107,                     // number of entries in resolution error table
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   506
    _invoke_method_size     = 139,                     // number of entries in invoke method table
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
    _nof_buckets            = 1009                     // number of buckets in hash table
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
  // Static variables
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
  // Hashtable holding loaded classes.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
  static Dictionary*            _dictionary;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
  // Hashtable holding placeholders for classes being loaded.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
  static PlaceholderTable*       _placeholders;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
  // Hashtable holding classes from the shared archive.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
  static Dictionary*             _shared_dictionary;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
  // Monotonically increasing counter which grows with
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
  // _number_of_classes as well as hot-swapping and breakpoint setting
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
  // and removal.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
  static int                     _number_of_modifications;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
  // Lock object for system class loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
  static oop                     _system_loader_lock_obj;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
  // Constraints on class loaders
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
  static LoaderConstraintTable*  _loader_constraints;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
  // Resolution errors
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
  static ResolutionErrorTable*   _resolution_errors;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   536
  // Invoke methods (JSR 292)
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   537
  static SymbolPropertyTable*    _invoke_method_table;
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   538
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
  // for VM_CounterDecay iteration support
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
  friend class CounterDecay;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
  static klassOop try_get_next_class();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
  static void validate_protection_domain(instanceKlassHandle klass,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
                                         Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
                                         Handle protection_domain, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
  friend class VM_PopulateDumpSharedSpace;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
  friend class TraversePlaceholdersClosure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
  static Dictionary*         dictionary() { return _dictionary; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
  static Dictionary*         shared_dictionary() { return _shared_dictionary; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
  static PlaceholderTable*   placeholders() { return _placeholders; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
  static LoaderConstraintTable* constraints() { return _loader_constraints; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
  static ResolutionErrorTable* resolution_errors() { return _resolution_errors; }
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
   556
  static SymbolPropertyTable* invoke_method_table() { return _invoke_method_table; }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
  // Basic loading operations
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
  static klassOop resolve_instance_class_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
  static klassOop resolve_array_class_or_null(symbolHandle class_name, Handle class_loader, Handle protection_domain, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
  static instanceKlassHandle handle_parallel_super_load(symbolHandle class_name, symbolHandle supername, Handle class_loader, Handle protection_domain, Handle lockObject, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
  // Wait on SystemDictionary_lock; unlocks lockObject before
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
  // waiting; relocks lockObject with correct recursion count
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
  // after waiting, but before reentering SystemDictionary_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
  // to preserve lock order semantics.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
  static void double_lock_wait(Handle lockObject, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
  static void define_instance_class(instanceKlassHandle k, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
  static instanceKlassHandle find_or_define_instance_class(symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
                                                Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
                                                instanceKlassHandle k, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
  static instanceKlassHandle load_shared_class(symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
                                               Handle class_loader, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
  static instanceKlassHandle load_shared_class(instanceKlassHandle ik,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
                                               Handle class_loader, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
  static instanceKlassHandle load_instance_class(symbolHandle class_name, Handle class_loader, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
  static Handle compute_loader_lock_object(Handle class_loader, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
  static void check_loader_lock_contention(Handle loader_lock, TRAPS);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   578
  static bool is_parallelCapable(Handle class_loader);
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 3820
diff changeset
   579
  static bool is_parallelDefine(Handle class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
  static klassOop find_shared_class(symbolHandle class_name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
  // Setup link to hierarchy
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
  static void add_to_hierarchy(instanceKlassHandle k, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
  // We pass in the hashtable index so we can calculate it outside of
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
  // the SystemDictionary_lock.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
  // Basic find on loaded classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
  static klassOop find_class(int index, unsigned int hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
                             symbolHandle name, Handle loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
  // Basic find on classes in the midst of being loaded
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
  static symbolOop find_placeholder(int index, unsigned int hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
                                    symbolHandle name, Handle loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
  // Basic find operation of loaded classes and classes in the midst
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
  // of loading;  used for assertions and verification only.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
  static oop find_class_or_placeholder(symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
                                       Handle class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
  // Updating entry in dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
  // Add a completely loaded class
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
  static void add_klass(int index, symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
                        Handle class_loader, KlassHandle obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
  // Add a placeholder for a class being loaded
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
  static void add_placeholder(int index,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
                              symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
                              Handle class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
  static void remove_placeholder(int index,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
                                 symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
                                 Handle class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
  // Performs cleanups after resolve_super_or_fail. This typically needs
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
  // to be called on failure.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
  // Won't throw, but can block.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
  static void resolution_cleanups(symbolHandle class_name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
                                  Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
                                  TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
  // Initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
  static void initialize_preloaded_classes(TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
  // Class loader constraints
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
  static void check_constraints(int index, unsigned int hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
                                instanceKlassHandle k, Handle loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
                                bool defining, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
  static void update_dictionary(int d_index, unsigned int d_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
                                int p_index, unsigned int p_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
                                instanceKlassHandle k, Handle loader, TRAPS);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
  // Variables holding commonly used klasses (preloaded)
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   635
  static klassOop _well_known_klasses[];
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
  // Lazily loaded klasses
489c9b5090e2 Initial load
duke
parents:
diff changeset
   638
  static volatile klassOop _abstract_ownable_synchronizer_klass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   640
  // table of box klasses (int_klass, etc.)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
  static klassOop _box_klasses[T_VOID+1];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
  static oop  _java_system_loader;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
  static bool _has_loadClassInternal;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
  static bool _has_checkPackageAccess;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
};
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   648
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   649
// Cf. vmSymbols vs. vmSymbolHandles
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   650
class SystemDictionaryHandles : AllStatic {
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   651
public:
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   652
  #define WK_KLASS_HANDLE_DECLARE(name, ignore_symbol, option) \
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   653
    static KlassHandle name() { \
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   654
      SystemDictionary::name(); \
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   655
      klassOop* loc = &SystemDictionary::_well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)]; \
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   656
      return KlassHandle(loc, true); \
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   657
    }
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   658
  WK_KLASSES_DO(WK_KLASS_HANDLE_DECLARE);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   659
  #undef WK_KLASS_HANDLE_DECLARE
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   660
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   661
  static KlassHandle box_klass(BasicType t);
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
   662
};