author | drwhite |
Wed, 17 Feb 2016 18:02:03 -0500 | |
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permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2016, 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/classLoader.hpp" |
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#include "classfile/systemDictionary_ext.hpp" |
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#include "jvmci/systemDictionary_jvmci.hpp" |
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#include "oops/objArrayOop.hpp" |
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#include "oops/symbol.hpp" |
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#include "runtime/java.hpp" |
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#include "runtime/reflectionUtils.hpp" |
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#include "utilities/hashtable.hpp" |
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#include "utilities/hashtable.inline.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] -> Klass* |
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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 ClassFileStream; |
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class Dictionary; |
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class PlaceholderTable; |
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class LoaderConstraintTable; |
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template <MEMFLAGS F> class HashtableBucket; |
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class ResolutionErrorTable; |
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class SymbolPropertyTable; |
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// 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(do_klass) \ |
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/* well-known classes */ \ |
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do_klass(Object_klass, java_lang_Object, Pre ) \ |
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do_klass(String_klass, java_lang_String, Pre ) \ |
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do_klass(Class_klass, java_lang_Class, Pre ) \ |
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do_klass(Cloneable_klass, java_lang_Cloneable, Pre ) \ |
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do_klass(ClassLoader_klass, java_lang_ClassLoader, Pre ) \ |
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do_klass(Serializable_klass, java_io_Serializable, Pre ) \ |
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do_klass(System_klass, java_lang_System, Pre ) \ |
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do_klass(Throwable_klass, java_lang_Throwable, Pre ) \ |
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do_klass(Error_klass, java_lang_Error, Pre ) \ |
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do_klass(ThreadDeath_klass, java_lang_ThreadDeath, Pre ) \ |
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do_klass(Exception_klass, java_lang_Exception, Pre ) \ |
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do_klass(RuntimeException_klass, java_lang_RuntimeException, Pre ) \ |
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do_klass(SecurityManager_klass, java_lang_SecurityManager, Pre ) \ |
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do_klass(ProtectionDomain_klass, java_security_ProtectionDomain, Pre ) \ |
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do_klass(AccessControlContext_klass, java_security_AccessControlContext, Pre ) \ |
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do_klass(SecureClassLoader_klass, java_security_SecureClassLoader, Pre ) \ |
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do_klass(ClassNotFoundException_klass, java_lang_ClassNotFoundException, Pre ) \ |
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do_klass(NoClassDefFoundError_klass, java_lang_NoClassDefFoundError, Pre ) \ |
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do_klass(LinkageError_klass, java_lang_LinkageError, Pre ) \ |
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do_klass(ClassCastException_klass, java_lang_ClassCastException, Pre ) \ |
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do_klass(ArrayStoreException_klass, java_lang_ArrayStoreException, Pre ) \ |
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do_klass(VirtualMachineError_klass, java_lang_VirtualMachineError, Pre ) \ |
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do_klass(OutOfMemoryError_klass, java_lang_OutOfMemoryError, Pre ) \ |
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do_klass(StackOverflowError_klass, java_lang_StackOverflowError, Pre ) \ |
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do_klass(IllegalMonitorStateException_klass, java_lang_IllegalMonitorStateException, Pre ) \ |
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do_klass(Reference_klass, java_lang_ref_Reference, Pre ) \ |
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/* Preload ref klasses and set reference types */ \ |
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do_klass(SoftReference_klass, java_lang_ref_SoftReference, Pre ) \ |
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do_klass(WeakReference_klass, java_lang_ref_WeakReference, Pre ) \ |
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do_klass(FinalReference_klass, java_lang_ref_FinalReference, Pre ) \ |
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do_klass(PhantomReference_klass, java_lang_ref_PhantomReference, Pre ) \ |
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do_klass(Finalizer_klass, java_lang_ref_Finalizer, Pre ) \ |
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\ |
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do_klass(Thread_klass, java_lang_Thread, Pre ) \ |
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do_klass(ThreadGroup_klass, java_lang_ThreadGroup, Pre ) \ |
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do_klass(Properties_klass, java_util_Properties, Pre ) \ |
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do_klass(reflect_AccessibleObject_klass, java_lang_reflect_AccessibleObject, Pre ) \ |
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do_klass(reflect_Field_klass, java_lang_reflect_Field, Pre ) \ |
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do_klass(reflect_Parameter_klass, java_lang_reflect_Parameter, Opt ) \ |
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do_klass(reflect_Method_klass, java_lang_reflect_Method, Pre ) \ |
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do_klass(reflect_Constructor_klass, java_lang_reflect_Constructor, Pre ) \ |
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/* NOTE: needed too early in bootstrapping process to have checks based on JDK version */ \ |
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/* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \ |
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do_klass(reflect_MagicAccessorImpl_klass, sun_reflect_MagicAccessorImpl, Opt ) \ |
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do_klass(reflect_MethodAccessorImpl_klass, sun_reflect_MethodAccessorImpl, Pre ) \ |
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do_klass(reflect_ConstructorAccessorImpl_klass, sun_reflect_ConstructorAccessorImpl, Pre ) \ |
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do_klass(reflect_DelegatingClassLoader_klass, sun_reflect_DelegatingClassLoader, Opt ) \ |
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do_klass(reflect_ConstantPool_klass, sun_reflect_ConstantPool, Opt ) \ |
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do_klass(reflect_UnsafeStaticFieldAccessorImpl_klass, sun_reflect_UnsafeStaticFieldAccessorImpl, Opt ) \ |
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do_klass(reflect_CallerSensitive_klass, sun_reflect_CallerSensitive, Opt ) \ |
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/* support for dynamic typing; it's OK if these are NULL in earlier JDKs */ \ |
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do_klass(DirectMethodHandle_klass, java_lang_invoke_DirectMethodHandle, Opt ) \ |
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do_klass(MethodHandle_klass, java_lang_invoke_MethodHandle, Pre ) \ |
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do_klass(MemberName_klass, java_lang_invoke_MemberName, Pre ) \ |
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do_klass(MethodHandleNatives_klass, java_lang_invoke_MethodHandleNatives, Pre ) \ |
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do_klass(LambdaForm_klass, java_lang_invoke_LambdaForm, Opt ) \ |
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do_klass(MethodType_klass, java_lang_invoke_MethodType, Pre ) \ |
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do_klass(BootstrapMethodError_klass, java_lang_BootstrapMethodError, Pre ) \ |
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do_klass(CallSite_klass, java_lang_invoke_CallSite, Pre ) \ |
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do_klass(Context_klass, java_lang_invoke_MethodHandleNatives_CallSiteContext, Pre ) \ |
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do_klass(ConstantCallSite_klass, java_lang_invoke_ConstantCallSite, Pre ) \ |
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do_klass(MutableCallSite_klass, java_lang_invoke_MutableCallSite, Pre ) \ |
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do_klass(VolatileCallSite_klass, java_lang_invoke_VolatileCallSite, Pre ) \ |
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/* Note: MethodHandle must be first, and VolatileCallSite last in group */ \ |
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\ |
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do_klass(StringBuffer_klass, java_lang_StringBuffer, Pre ) \ |
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do_klass(StringBuilder_klass, java_lang_StringBuilder, Pre ) \ |
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do_klass(internal_Unsafe_klass, jdk_internal_misc_Unsafe, Pre ) \ |
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/* support for CDS */ \ |
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do_klass(ByteArrayInputStream_klass, java_io_ByteArrayInputStream, Pre ) \ |
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do_klass(File_klass, java_io_File, Pre ) \ |
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do_klass(URLClassLoader_klass, java_net_URLClassLoader, Pre ) \ |
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do_klass(URL_klass, java_net_URL, Pre ) \ |
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do_klass(Jar_Manifest_klass, java_util_jar_Manifest, Pre ) \ |
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do_klass(sun_misc_Launcher_klass, sun_misc_Launcher, Pre ) \ |
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do_klass(CodeSource_klass, java_security_CodeSource, Pre ) \ |
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do_klass(StackTraceElement_klass, java_lang_StackTraceElement, Opt ) \ |
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/* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \ |
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do_klass(nio_Buffer_klass, java_nio_Buffer, Opt ) \ |
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\ |
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/* Stack Walking */ \ |
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do_klass(StackWalker_klass, java_lang_StackWalker, Opt ) \ |
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do_klass(AbstractStackWalker_klass, java_lang_StackStreamFactory_AbstractStackWalker, Opt ) \ |
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do_klass(StackFrameInfo_klass, java_lang_StackFrameInfo, Opt ) \ |
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do_klass(LiveStackFrameInfo_klass, java_lang_LiveStackFrameInfo, Opt ) \ |
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\ |
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/* Preload boxing klasses */ \ |
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do_klass(Boolean_klass, java_lang_Boolean, Pre ) \ |
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do_klass(Character_klass, java_lang_Character, Pre ) \ |
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do_klass(Float_klass, java_lang_Float, Pre ) \ |
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do_klass(Double_klass, java_lang_Double, Pre ) \ |
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do_klass(Byte_klass, java_lang_Byte, Pre ) \ |
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do_klass(Short_klass, java_lang_Short, Pre ) \ |
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do_klass(Integer_klass, java_lang_Integer, Pre ) \ |
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do_klass(Long_klass, java_lang_Long, Pre ) \ |
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/* Extensions */ \ |
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WK_KLASSES_DO_EXT(do_klass) \ |
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/* JVMCI classes. These are loaded on-demand. */ \ |
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JVMCI_WK_KLASSES_DO(do_klass) \ |
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/*end*/ |
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207 |
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1 | 209 |
class SystemDictionary : AllStatic { |
210 |
friend class VMStructs; |
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friend class SystemDictionaryHandles; |
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friend class SharedClassUtil; |
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|
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public: |
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enum WKID { |
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NO_WKID = 0, |
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10546 | 218 |
#define WK_KLASS_ENUM(name, symbol, ignore_o) WK_KLASS_ENUM_NAME(name), WK_KLASS_ENUM_NAME(symbol) = WK_KLASS_ENUM_NAME(name), |
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WK_KLASSES_DO(WK_KLASS_ENUM) |
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#undef WK_KLASS_ENUM |
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221 |
|
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WKID_LIMIT, |
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#if INCLUDE_JVMCI |
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FIRST_JVMCI_WKID = WK_KLASS_ENUM_NAME(HotSpotCompiledCode_klass), |
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LAST_JVMCI_WKID = WK_KLASS_ENUM_NAME(Value_klass), |
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#endif |
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FIRST_WKID = NO_WKID + 1 |
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230 |
}; |
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231 |
|
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enum InitOption { |
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Pre, // preloaded; error if not present |
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234 |
|
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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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237 |
|
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Opt, // preload tried; NULL if not present |
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#if INCLUDE_JVMCI |
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Jvmci, // preload tried; error if not present, use only with JVMCI |
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#endif |
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OPTION_LIMIT, |
25057 | 243 |
CEIL_LG_OPTION_LIMIT = 2 // OPTION_LIMIT <= (1<<CEIL_LG_OPTION_LIMIT) |
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}; |
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245 |
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246 |
|
1 | 247 |
// Returns a class with a given class name and class loader. Loads the |
248 |
// class if needed. If not found a NoClassDefFoundError or a |
|
249 |
// ClassNotFoundException is thrown, depending on the value on the |
|
250 |
// throw_error flag. For most uses the throw_error argument should be set |
|
251 |
// to true. |
|
252 |
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253 |
static Klass* resolve_or_fail(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS); |
1 | 254 |
// Convenient call for null loader and protection domain. |
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static Klass* resolve_or_fail(Symbol* class_name, bool throw_error, TRAPS); |
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protected: |
1 | 257 |
// handle error translation for resolve_or_null results |
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static Klass* handle_resolution_exception(Symbol* class_name, bool throw_error, KlassHandle klass_h, TRAPS); |
1 | 259 |
|
260 |
public: |
|
261 |
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262 |
// Returns a class with a given class name and class loader. |
|
263 |
// Loads the class if needed. If not found NULL is returned. |
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static Klass* resolve_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
1 | 265 |
// Version with null loader and protection domain |
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static Klass* resolve_or_null(Symbol* class_name, TRAPS); |
1 | 267 |
|
268 |
// Resolve a superclass or superinterface. Called from ClassFileParser, |
|
269 |
// parse_interfaces, resolve_instance_class_or_null, load_shared_class |
|
270 |
// "child_name" is the class whose super class or interface is being resolved. |
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static Klass* resolve_super_or_fail(Symbol* child_name, |
34666 | 272 |
Symbol* class_name, |
273 |
Handle class_loader, |
|
274 |
Handle protection_domain, |
|
275 |
bool is_superclass, |
|
276 |
TRAPS); |
|
1 | 277 |
|
278 |
// Parse new stream. This won't update the system dictionary or |
|
279 |
// class hierarchy, simply parse the stream. Used by JVMTI RedefineClasses. |
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static Klass* parse_stream(Symbol* class_name, |
34666 | 281 |
Handle class_loader, |
282 |
Handle protection_domain, |
|
283 |
ClassFileStream* st, |
|
284 |
TRAPS) { |
|
285 |
return parse_stream(class_name, |
|
286 |
class_loader, |
|
287 |
protection_domain, |
|
288 |
st, |
|
289 |
NULL, // host klass |
|
290 |
NULL, // cp_patches |
|
291 |
THREAD); |
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} |
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static Klass* parse_stream(Symbol* class_name, |
34666 | 294 |
Handle class_loader, |
295 |
Handle protection_domain, |
|
296 |
ClassFileStream* st, |
|
297 |
const Klass* host_klass, |
|
298 |
GrowableArray<Handle>* cp_patches, |
|
299 |
TRAPS); |
|
1 | 300 |
|
301 |
// Resolve from stream (called by jni_DefineClass and JVM_DefineClass) |
|
34666 | 302 |
static Klass* resolve_from_stream(Symbol* class_name, |
303 |
Handle class_loader, |
|
304 |
Handle protection_domain, |
|
305 |
ClassFileStream* st, |
|
306 |
TRAPS); |
|
1 | 307 |
|
308 |
// Lookup an already loaded class. If not found NULL is returned. |
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static Klass* find(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
1 | 310 |
|
311 |
// Lookup an already loaded instance or array class. |
|
312 |
// Do not make any queries to class loaders; consult only the cache. |
|
313 |
// If not found NULL is returned. |
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static Klass* find_instance_or_array_klass(Symbol* class_name, |
1 | 315 |
Handle class_loader, |
316 |
Handle protection_domain, |
|
317 |
TRAPS); |
|
318 |
||
319 |
// Lookup an instance or array class that has already been loaded |
|
320 |
// either into the given class loader, or else into another class |
|
321 |
// loader that is constrained (via loader constraints) to produce |
|
322 |
// a consistent class. Do not take protection domains into account. |
|
323 |
// Do not make any queries to class loaders; consult only the cache. |
|
324 |
// Return NULL if the class is not found. |
|
325 |
// |
|
326 |
// This function is a strict superset of find_instance_or_array_klass. |
|
327 |
// This function (the unchecked version) makes a conservative prediction |
|
328 |
// of the result of the checked version, assuming successful lookup. |
|
329 |
// If both functions return non-null, they must return the same value. |
|
330 |
// Also, the unchecked version may sometimes be non-null where the |
|
331 |
// checked version is null. This can occur in several ways: |
|
332 |
// 1. No query has yet been made to the class loader. |
|
333 |
// 2. The class loader was queried, but chose not to delegate. |
|
334 |
// 3. ClassLoader.checkPackageAccess rejected a proposed protection domain. |
|
335 |
// 4. Loading was attempted, but there was a linkage error of some sort. |
|
336 |
// In all of these cases, the loader constraints on this type are |
|
337 |
// satisfied, and it is safe for classes in the given class loader |
|
338 |
// to manipulate strongly-typed values of the found class, subject |
|
339 |
// to local linkage and access checks. |
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static Klass* find_constrained_instance_or_array_klass(Symbol* class_name, |
1 | 341 |
Handle class_loader, |
342 |
TRAPS); |
|
343 |
||
344 |
// Iterate over all klasses in dictionary |
|
345 |
// Just the classes from defining class loaders |
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346 |
static void classes_do(void f(Klass*)); |
1 | 347 |
// Added for initialize_itable_for_klass to handle exceptions |
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348 |
static void classes_do(void f(Klass*, TRAPS), TRAPS); |
1 | 349 |
// All classes, and their class loaders |
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350 |
static void classes_do(void f(Klass*, ClassLoaderData*)); |
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351 |
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static void placeholders_do(void f(Symbol*)); |
1 | 353 |
|
354 |
// Iterate over all methods in all klasses in dictionary |
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355 |
static void methods_do(void f(Method*)); |
1 | 356 |
|
357 |
// Garbage collection support |
|
358 |
||
359 |
// This method applies "blk->do_oop" to all the pointers to "system" |
|
360 |
// classes and loaders. |
|
361 |
static void always_strong_oops_do(OopClosure* blk); |
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362 |
static void always_strong_classes_do(KlassClosure* closure); |
1 | 363 |
|
364 |
// Unload (that is, break root links to) all unmarked classes and |
|
365 |
// loaders. Returns "true" iff something was unloaded. |
|
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static bool do_unloading(BoolObjectClosure* is_alive, |
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bool clean_previous_versions = true); |
1 | 368 |
|
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369 |
// Used by DumpSharedSpaces only to remove classes that failed verification |
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370 |
static void remove_classes_in_error_state(); |
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371 |
|
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372 |
static int calculate_systemdictionary_size(int loadedclasses); |
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373 |
|
1 | 374 |
// Applies "f->do_oop" to all root oops in the system dictionary. |
375 |
static void oops_do(OopClosure* f); |
|
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376 |
static void roots_oops_do(OopClosure* strong, OopClosure* weak); |
1 | 377 |
|
378 |
// System loader lock |
|
379 |
static oop system_loader_lock() { return _system_loader_lock_obj; } |
|
380 |
||
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381 |
protected: |
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382 |
// Extended Redefine classes support (tbi) |
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383 |
static void preloaded_classes_do(KlassClosure* f); |
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384 |
static void lazily_loaded_classes_do(KlassClosure* f); |
1 | 385 |
public: |
386 |
// Sharing support. |
|
387 |
static void reorder_dictionary(); |
|
388 |
static void copy_buckets(char** top, char* end); |
|
389 |
static void copy_table(char** top, char* end); |
|
390 |
static void reverse(); |
|
13195 | 391 |
static void set_shared_dictionary(HashtableBucket<mtClass>* t, int length, |
1 | 392 |
int number_of_entries); |
393 |
// Printing |
|
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394 |
static void print(bool details = true); |
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|
395 |
static void print_shared(bool details = true); |
1 | 396 |
|
397 |
// Number of contained klasses |
|
398 |
// This is both fully loaded classes and classes in the process |
|
399 |
// of being loaded |
|
400 |
static int number_of_classes(); |
|
401 |
||
402 |
// Monotonically increasing counter which grows as classes are |
|
403 |
// loaded or modifications such as hot-swapping or setting/removing |
|
404 |
// of breakpoints are performed |
|
405 |
static inline int number_of_modifications() { assert_locked_or_safepoint(Compile_lock); return _number_of_modifications; } |
|
406 |
// Needed by evolution and breakpoint code |
|
407 |
static inline void notice_modification() { assert_locked_or_safepoint(Compile_lock); ++_number_of_modifications; } |
|
408 |
||
409 |
// Verification |
|
410 |
static void verify(); |
|
411 |
||
412 |
#ifdef ASSERT |
|
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|
413 |
static bool is_internal_format(Symbol* class_name); |
1 | 414 |
#endif |
415 |
||
416 |
// Initialization |
|
417 |
static void initialize(TRAPS); |
|
418 |
||
419 |
// Fast access to commonly used classes (preloaded) |
|
33602 | 420 |
static InstanceKlass* check_klass(InstanceKlass* k) { |
1 | 421 |
assert(k != NULL, "preloaded klass not initialized"); |
422 |
return k; |
|
423 |
} |
|
424 |
||
33602 | 425 |
static InstanceKlass* check_klass_Pre(InstanceKlass* k) { return check_klass(k); } |
426 |
static InstanceKlass* check_klass_Opt(InstanceKlass* k) { return k; } |
|
1 | 427 |
|
33602 | 428 |
JVMCI_ONLY(static InstanceKlass* check_klass_Jvmci(InstanceKlass* k) { return k; }) |
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429 |
|
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430 |
static bool initialize_wk_klass(WKID id, int init_opt, TRAPS); |
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|
431 |
static void initialize_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS); |
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|
432 |
static void initialize_wk_klasses_through(WKID end_id, WKID &start_id, TRAPS) { |
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|
433 |
int limit = (int)end_id + 1; |
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|
434 |
initialize_wk_klasses_until((WKID) limit, start_id, THREAD); |
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|
435 |
} |
1 | 436 |
|
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|
437 |
public: |
10546 | 438 |
#define WK_KLASS_DECLARE(name, symbol, option) \ |
33602 | 439 |
static InstanceKlass* name() { return check_klass_##option(_well_known_klasses[WK_KLASS_ENUM_NAME(name)]); } \ |
440 |
static InstanceKlass** name##_addr() { \ |
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|
441 |
return &SystemDictionary::_well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)]; \ |
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|
442 |
} |
379
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|
443 |
WK_KLASSES_DO(WK_KLASS_DECLARE); |
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|
444 |
#undef WK_KLASS_DECLARE |
1 | 445 |
|
33602 | 446 |
static InstanceKlass* well_known_klass(WKID id) { |
10546 | 447 |
assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob"); |
448 |
return _well_known_klasses[id]; |
|
449 |
} |
|
450 |
||
33602 | 451 |
static InstanceKlass** well_known_klass_addr(WKID id) { |
13728
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|
452 |
assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob"); |
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|
453 |
return &_well_known_klasses[id]; |
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|
454 |
} |
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|
455 |
|
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|
456 |
// Local definition for direct access to the private array: |
394 | 457 |
#define WK_KLASS(name) _well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)] |
1 | 458 |
|
33602 | 459 |
static InstanceKlass* box_klass(BasicType t) { |
1 | 460 |
assert((uint)t < T_VOID+1, "range check"); |
461 |
return check_klass(_box_klasses[t]); |
|
462 |
} |
|
13728
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|
463 |
static BasicType box_klass_type(Klass* k); // inverse of box_klass |
1 | 464 |
|
465 |
// methods returning lazily loaded klasses |
|
466 |
// The corresponding method to load the class must be called before calling them. |
|
33602 | 467 |
static InstanceKlass* abstract_ownable_synchronizer_klass() { return check_klass(_abstract_ownable_synchronizer_klass); } |
1 | 468 |
|
469 |
static void load_abstract_ownable_synchronizer_klass(TRAPS); |
|
470 |
||
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|
471 |
protected: |
1 | 472 |
// Tells whether ClassLoader.loadClassInternal is present |
473 |
static bool has_loadClassInternal() { return _has_loadClassInternal; } |
|
474 |
||
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|
475 |
// Returns the class loader data to be used when looking up/updating the |
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|
476 |
// system dictionary. |
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|
477 |
static ClassLoaderData *class_loader_data(Handle class_loader) { |
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|
478 |
return ClassLoaderData::class_loader_data(class_loader()); |
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|
479 |
} |
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|
480 |
|
1 | 481 |
public: |
482 |
// Tells whether ClassLoader.checkPackageAccess is present |
|
483 |
static bool has_checkPackageAccess() { return _has_checkPackageAccess; } |
|
484 |
||
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|
485 |
static bool Parameter_klass_loaded() { return WK_KLASS(reflect_Parameter_klass) != NULL; } |
4571 | 486 |
static bool Class_klass_loaded() { return WK_KLASS(Class_klass) != NULL; } |
487 |
static bool Cloneable_klass_loaded() { return WK_KLASS(Cloneable_klass) != NULL; } |
|
13728
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|
488 |
static bool Object_klass_loaded() { return WK_KLASS(Object_klass) != NULL; } |
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|
489 |
static bool ClassLoader_klass_loaded() { return WK_KLASS(ClassLoader_klass) != NULL; } |
1 | 490 |
|
491 |
// Returns default system loader |
|
492 |
static oop java_system_loader(); |
|
493 |
||
494 |
// Compute the default system loader |
|
495 |
static void compute_java_system_loader(TRAPS); |
|
496 |
||
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|
497 |
// Register a new class loader |
14588
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
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|
498 |
static ClassLoaderData* register_loader(Handle class_loader, TRAPS); |
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changeset
|
499 |
protected: |
1 | 500 |
// Mirrors for primitive classes (created eagerly) |
501 |
static oop check_mirror(oop m) { |
|
502 |
assert(m != NULL, "mirror not initialized"); |
|
503 |
return m; |
|
504 |
} |
|
505 |
||
506 |
public: |
|
507 |
// Note: java_lang_Class::primitive_type is the inverse of java_mirror |
|
508 |
||
509 |
// Check class loader constraints |
|
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changeset
|
510 |
static bool add_loader_constraint(Symbol* name, Handle loader1, |
1 | 511 |
Handle loader2, TRAPS); |
16591
73047b0eb568
8009731: Confusing error message for loader constraint violation
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diff
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|
512 |
static Symbol* check_signature_loaders(Symbol* signature, Handle loader1, |
73047b0eb568
8009731: Confusing error message for loader constraint violation
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|
513 |
Handle loader2, bool is_method, TRAPS); |
1 | 514 |
|
2534 | 515 |
// JSR 292 |
13391
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|
516 |
// find a java.lang.invoke.MethodHandle.invoke* method for a given signature |
30245956af37
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|
517 |
// (asks Java to compute it if necessary, except in a compiler thread) |
30245956af37
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|
518 |
static methodHandle find_method_handle_invoker(Symbol* name, |
30245956af37
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|
519 |
Symbol* signature, |
30245956af37
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changeset
|
520 |
KlassHandle accessing_klass, |
30245956af37
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changeset
|
521 |
Handle *appendix_result, |
13929
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|
522 |
Handle *method_type_result, |
13391
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|
523 |
TRAPS); |
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changeset
|
524 |
// for a given signature, find the internal MethodHandle method (linkTo* or invokeBasic) |
30245956af37
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|
525 |
// (does not ask Java, since this is a low-level intrinsic defined by the JVM) |
30245956af37
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|
526 |
static methodHandle find_method_handle_intrinsic(vmIntrinsics::ID iid, |
30245956af37
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parents:
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|
527 |
Symbol* signature, |
30245956af37
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parents:
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diff
changeset
|
528 |
TRAPS); |
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parents:
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diff
changeset
|
529 |
// find a java.lang.invoke.MethodType object for a given signature |
30245956af37
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changeset
|
530 |
// (asks Java to compute it if necessary, except in a compiler thread) |
8076
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diff
changeset
|
531 |
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
|
532 |
KlassHandle accessing_klass, |
5420
586d3988e72b
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
4581
diff
changeset
|
533 |
TRAPS); |
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
13195
diff
changeset
|
534 |
|
8676
9098d4e927e1
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
8675
diff
changeset
|
535 |
// ask Java to compute a java.lang.invoke.MethodHandle object for a given CP entry |
5882 | 536 |
static Handle link_method_handle_constant(KlassHandle caller, |
537 |
int ref_kind, //e.g., JVM_REF_invokeVirtual |
|
538 |
KlassHandle callee, |
|
8076
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
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diff
changeset
|
539 |
Symbol* name, |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
changeset
|
540 |
Symbol* signature, |
5882 | 541 |
TRAPS); |
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
542 |
|
2570
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
2534
diff
changeset
|
543 |
// ask Java to create a dynamic call site, while linking an invokedynamic op |
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
544 |
static methodHandle find_dynamic_call_site_invoker(KlassHandle caller, |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
545 |
Handle bootstrap_method, |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
546 |
Symbol* name, |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
547 |
Symbol* type, |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
548 |
Handle *appendix_result, |
13929
8da0dc50a6e4
7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
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parents:
13728
diff
changeset
|
549 |
Handle *method_type_result, |
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
550 |
TRAPS); |
2570
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
2534
diff
changeset
|
551 |
|
1 | 552 |
// Utility for printing loader "name" as part of tracing constraints |
34666 | 553 |
static const char* loader_name(const oop loader); |
554 |
static const char* loader_name(const ClassLoaderData* loader_data); |
|
1 | 555 |
|
556 |
// Record the error when the first attempt to resolve a reference from a constant |
|
557 |
// pool entry to a class fails. |
|
33593
60764a78fa5c
8140274: methodHandles and constantPoolHandles should be passed as const references
coleenp
parents:
33160
diff
changeset
|
558 |
static void add_resolution_error(const constantPoolHandle& pool, int which, Symbol* error, |
24334
36096f7271f4
8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents:
23872
diff
changeset
|
559 |
Symbol* message); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
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13391
diff
changeset
|
560 |
static void delete_resolution_error(ConstantPool* pool); |
33593
60764a78fa5c
8140274: methodHandles and constantPoolHandles should be passed as const references
coleenp
parents:
33160
diff
changeset
|
561 |
static Symbol* find_resolution_error(const constantPoolHandle& pool, int which, |
24334
36096f7271f4
8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents:
23872
diff
changeset
|
562 |
Symbol** message); |
1 | 563 |
|
26135
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iklam
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25492
diff
changeset
|
564 |
protected: |
1 | 565 |
|
566 |
enum Constants { |
|
567 |
_loader_constraint_size = 107, // number of entries in constraint table |
|
568 |
_resolution_error_size = 107, // number of entries in resolution error table |
|
2534 | 569 |
_invoke_method_size = 139, // number of entries in invoke method table |
11628
13155c0c00b4
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
10546
diff
changeset
|
570 |
_nof_buckets = 1009, // number of buckets in hash table for placeholders |
13155c0c00b4
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
10546
diff
changeset
|
571 |
_old_default_sdsize = 1009, // backward compat for system dictionary size |
13155c0c00b4
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
10546
diff
changeset
|
572 |
_prime_array_size = 8, // array of primes for system dictionary size |
13155c0c00b4
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
10546
diff
changeset
|
573 |
_average_depth_goal = 3 // goal for lookup length |
1 | 574 |
}; |
575 |
||
576 |
||
577 |
// Static variables |
|
578 |
||
11628
13155c0c00b4
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
10546
diff
changeset
|
579 |
// hashtable sizes for system dictionary to allow growth |
13155c0c00b4
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
10546
diff
changeset
|
580 |
// prime numbers for system dictionary size |
13155c0c00b4
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
10546
diff
changeset
|
581 |
static int _sdgeneration; |
13155c0c00b4
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
10546
diff
changeset
|
582 |
static const int _primelist[_prime_array_size]; |
13155c0c00b4
7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents:
10546
diff
changeset
|
583 |
|
1 | 584 |
// Hashtable holding loaded classes. |
585 |
static Dictionary* _dictionary; |
|
586 |
||
587 |
// Hashtable holding placeholders for classes being loaded. |
|
588 |
static PlaceholderTable* _placeholders; |
|
589 |
||
590 |
// Hashtable holding classes from the shared archive. |
|
591 |
static Dictionary* _shared_dictionary; |
|
592 |
||
593 |
// Monotonically increasing counter which grows with |
|
594 |
// _number_of_classes as well as hot-swapping and breakpoint setting |
|
595 |
// and removal. |
|
596 |
static int _number_of_modifications; |
|
597 |
||
598 |
// Lock object for system class loader |
|
599 |
static oop _system_loader_lock_obj; |
|
600 |
||
601 |
// Constraints on class loaders |
|
602 |
static LoaderConstraintTable* _loader_constraints; |
|
603 |
||
604 |
// Resolution errors |
|
605 |
static ResolutionErrorTable* _resolution_errors; |
|
606 |
||
2534 | 607 |
// Invoke methods (JSR 292) |
608 |
static SymbolPropertyTable* _invoke_method_table; |
|
609 |
||
1 | 610 |
public: |
611 |
// for VM_CounterDecay iteration support |
|
612 |
friend class CounterDecay; |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
613 |
static Klass* try_get_next_class(); |
1 | 614 |
|
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
615 |
protected: |
1 | 616 |
static void validate_protection_domain(instanceKlassHandle klass, |
617 |
Handle class_loader, |
|
618 |
Handle protection_domain, TRAPS); |
|
619 |
||
620 |
friend class VM_PopulateDumpSharedSpace; |
|
621 |
friend class TraversePlaceholdersClosure; |
|
622 |
static Dictionary* dictionary() { return _dictionary; } |
|
623 |
static Dictionary* shared_dictionary() { return _shared_dictionary; } |
|
624 |
static PlaceholderTable* placeholders() { return _placeholders; } |
|
625 |
static LoaderConstraintTable* constraints() { return _loader_constraints; } |
|
626 |
static ResolutionErrorTable* resolution_errors() { return _resolution_errors; } |
|
2534 | 627 |
static SymbolPropertyTable* invoke_method_table() { return _invoke_method_table; } |
1 | 628 |
|
629 |
// Basic loading operations |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
630 |
static Klass* resolve_instance_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
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13391
diff
changeset
|
631 |
static Klass* resolve_array_class_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS); |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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7900
diff
changeset
|
632 |
static instanceKlassHandle handle_parallel_super_load(Symbol* class_name, Symbol* supername, Handle class_loader, Handle protection_domain, Handle lockObject, TRAPS); |
1 | 633 |
// Wait on SystemDictionary_lock; unlocks lockObject before |
634 |
// waiting; relocks lockObject with correct recursion count |
|
635 |
// after waiting, but before reentering SystemDictionary_lock |
|
636 |
// to preserve lock order semantics. |
|
637 |
static void double_lock_wait(Handle lockObject, TRAPS); |
|
638 |
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
|
639 |
static instanceKlassHandle find_or_define_instance_class(Symbol* class_name, |
1 | 640 |
Handle class_loader, |
641 |
instanceKlassHandle k, TRAPS); |
|
642 |
static instanceKlassHandle load_shared_class(instanceKlassHandle ik, |
|
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
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parents:
25492
diff
changeset
|
643 |
Handle class_loader, |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
644 |
Handle protection_domain, |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
645 |
TRAPS); |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7900
diff
changeset
|
646 |
static instanceKlassHandle load_instance_class(Symbol* class_name, Handle class_loader, TRAPS); |
1 | 647 |
static Handle compute_loader_lock_object(Handle class_loader, TRAPS); |
648 |
static void check_loader_lock_contention(Handle loader_lock, TRAPS); |
|
1890 | 649 |
static bool is_parallelCapable(Handle class_loader); |
4445
1356c4b003de
6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents:
3820
diff
changeset
|
650 |
static bool is_parallelDefine(Handle class_loader); |
1 | 651 |
|
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652 |
public: |
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|
653 |
static instanceKlassHandle load_shared_class(Symbol* class_name, |
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654 |
Handle class_loader, |
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|
655 |
TRAPS); |
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656 |
static bool is_ext_class_loader(Handle class_loader); |
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|
657 |
|
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|
658 |
protected: |
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|
659 |
static Klass* find_shared_class(Symbol* class_name); |
1 | 660 |
|
661 |
// Setup link to hierarchy |
|
662 |
static void add_to_hierarchy(instanceKlassHandle k, TRAPS); |
|
663 |
||
664 |
// We pass in the hashtable index so we can calculate it outside of |
|
665 |
// the SystemDictionary_lock. |
|
666 |
||
667 |
// Basic find on loaded classes |
|
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|
668 |
static Klass* find_class(int index, unsigned int hash, |
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|
669 |
Symbol* name, ClassLoaderData* loader_data); |
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|
670 |
static Klass* find_class(Symbol* class_name, ClassLoaderData* loader_data); |
1 | 671 |
|
672 |
// Basic find on classes in the midst of being loaded |
|
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|
673 |
static Symbol* find_placeholder(Symbol* name, ClassLoaderData* loader_data); |
1 | 674 |
|
675 |
// Add a placeholder for a class being loaded |
|
676 |
static void add_placeholder(int index, |
|
8076
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6990754: Use native memory and reference counting to implement SymbolTable
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|
677 |
Symbol* class_name, |
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|
678 |
ClassLoaderData* loader_data); |
1 | 679 |
static void remove_placeholder(int index, |
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|
680 |
Symbol* class_name, |
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|
681 |
ClassLoaderData* loader_data); |
1 | 682 |
|
683 |
// Performs cleanups after resolve_super_or_fail. This typically needs |
|
684 |
// to be called on failure. |
|
685 |
// Won't throw, but can block. |
|
8076
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|
686 |
static void resolution_cleanups(Symbol* class_name, |
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|
687 |
ClassLoaderData* loader_data, |
1 | 688 |
TRAPS); |
689 |
||
690 |
// Initialization |
|
691 |
static void initialize_preloaded_classes(TRAPS); |
|
692 |
||
693 |
// Class loader constraints |
|
694 |
static void check_constraints(int index, unsigned int hash, |
|
695 |
instanceKlassHandle k, Handle loader, |
|
696 |
bool defining, TRAPS); |
|
697 |
static void update_dictionary(int d_index, unsigned int d_hash, |
|
698 |
int p_index, unsigned int p_hash, |
|
13728
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|
699 |
instanceKlassHandle k, Handle loader, |
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changeset
|
700 |
TRAPS); |
1 | 701 |
|
702 |
// Variables holding commonly used klasses (preloaded) |
|
33602 | 703 |
static InstanceKlass* _well_known_klasses[]; |
1 | 704 |
|
705 |
// Lazily loaded klasses |
|
33602 | 706 |
static InstanceKlass* volatile _abstract_ownable_synchronizer_klass; |
1 | 707 |
|
379
10767ca40189
6652736: well known classes in system dictionary are inefficiently processed
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diff
changeset
|
708 |
// table of box klasses (int_klass, etc.) |
33602 | 709 |
static InstanceKlass* _box_klasses[T_VOID+1]; |
1 | 710 |
|
711 |
static oop _java_system_loader; |
|
712 |
||
713 |
static bool _has_loadClassInternal; |
|
714 |
static bool _has_checkPackageAccess; |
|
715 |
}; |
|
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5c7b6f4ce0a1
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|
716 |
|
7397 | 717 |
#endif // SHARE_VM_CLASSFILE_SYSTEMDICTIONARY_HPP |