Andreas Tobler
3bed5c6bae
2006-05-21 Andreas Tobler <a.tobler@schweiz.ch> * java/lang/natClass.cc (_Jv_FindMethodInCache): Mark klass, name and signature as MAYBE_UNUSED for HAVE_TLS == 0. (_Jv_AddMethodToCache): Mark klass and method as MAYBE_UNUSED for HAVE_TLS == 0. From-SVN: r113939
1267 lines
34 KiB
C++
1267 lines
34 KiB
C++
// natClass.cc - Implementation of java.lang.Class native methods.
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/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
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Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#include <config.h>
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#include <limits.h>
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#include <string.h>
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#include <stddef.h>
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#include <stdio.h>
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#pragma implementation "Class.h"
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#include <gcj/cni.h>
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#include <jvm.h>
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#include <java-threads.h>
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#include <java/lang/Class.h>
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#include <java/lang/ClassLoader.h>
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#include <java/lang/String.h>
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#include <java/lang/reflect/Modifier.h>
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#include <java/lang/reflect/Member.h>
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#include <java/lang/reflect/Method.h>
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#include <java/lang/reflect/Field.h>
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#include <java/lang/reflect/Constructor.h>
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#include <java/lang/AbstractMethodError.h>
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#include <java/lang/ArrayStoreException.h>
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#include <java/lang/ClassCastException.h>
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#include <java/lang/ClassNotFoundException.h>
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#include <java/lang/ExceptionInInitializerError.h>
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#include <java/lang/IllegalAccessException.h>
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#include <java/lang/IllegalAccessError.h>
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#include <java/lang/IllegalArgumentException.h>
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#include <java/lang/IncompatibleClassChangeError.h>
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#include <java/lang/NoSuchFieldError.h>
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#include <java/lang/ArrayIndexOutOfBoundsException.h>
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#include <java/lang/InstantiationException.h>
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#include <java/lang/NoClassDefFoundError.h>
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#include <java/lang/NoSuchFieldException.h>
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#include <java/lang/NoSuchMethodError.h>
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#include <java/lang/NoSuchMethodException.h>
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#include <java/lang/Thread.h>
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#include <java/lang/NullPointerException.h>
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#include <java/lang/RuntimePermission.h>
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#include <java/lang/System.h>
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#include <java/lang/SecurityManager.h>
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#include <java/lang/StringBuffer.h>
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#include <java/lang/VMClassLoader.h>
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#include <gcj/method.h>
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#include <gnu/gcj/RawData.h>
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#include <java/lang/VerifyError.h>
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#include <java-cpool.h>
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#include <java-interp.h>
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#include <java-assert.h>
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#include <java-stack.h>
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#include <execution.h>
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using namespace gcj;
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jclass
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java::lang::Class::forName (jstring className, jboolean initialize,
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java::lang::ClassLoader *loader)
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{
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if (! className)
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throw new java::lang::NullPointerException;
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jsize length = _Jv_GetStringUTFLength (className);
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char buffer[length];
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_Jv_GetStringUTFRegion (className, 0, className->length(), buffer);
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_Jv_Utf8Const *name = _Jv_makeUtf8Const (buffer, length);
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if (! _Jv_VerifyClassName (name))
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throw new java::lang::ClassNotFoundException (className);
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jclass klass = (buffer[0] == '['
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? _Jv_FindClassFromSignature (name->chars(), loader)
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: _Jv_FindClass (name, loader));
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if (klass == NULL)
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throw new java::lang::ClassNotFoundException (className);
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if (initialize)
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_Jv_InitClass (klass);
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return klass;
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}
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jclass
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java::lang::Class::forName (jstring className)
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{
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java::lang::ClassLoader *loader = NULL;
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jclass caller = _Jv_StackTrace::GetCallingClass (&Class::class$);
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if (caller)
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loader = caller->getClassLoaderInternal();
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return forName (className, true, loader);
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}
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java::lang::ClassLoader *
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java::lang::Class::getClassLoader (void)
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{
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java::lang::SecurityManager *s = java::lang::System::getSecurityManager();
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if (s != NULL)
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{
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jclass caller = _Jv_StackTrace::GetCallingClass (&Class::class$);
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return getClassLoader (caller);
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}
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return loader;
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}
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java::lang::ClassLoader *
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java::lang::Class::getClassLoader (jclass caller)
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{
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java::lang::SecurityManager *s = java::lang::System::getSecurityManager();
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if (s != NULL)
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{
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ClassLoader *caller_loader = caller->getClassLoaderInternal();
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// If the caller has a non-null class loader, and that loader
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// is not this class' loader or an ancestor thereof, then do a
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// security check.
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if (caller_loader != NULL && ! caller_loader->isAncestorOf(loader))
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s->checkPermission (new RuntimePermission (JvNewStringLatin1 ("getClassLoader")));
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}
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return loader;
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}
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java::lang::reflect::Constructor *
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java::lang::Class::getConstructor (JArray<jclass> *param_types)
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{
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memberAccessCheck(java::lang::reflect::Member::PUBLIC);
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jstring partial_sig = getSignature (param_types, true);
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jint hash = partial_sig->hashCode ();
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int i = isPrimitive () ? 0 : method_count;
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while (--i >= 0)
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{
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if (_Jv_equalUtf8Consts (methods[i].name, init_name)
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&& _Jv_equal (methods[i].signature, partial_sig, hash))
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{
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// Found it. For getConstructor, the constructor must be
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// public.
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using namespace java::lang::reflect;
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if (! Modifier::isPublic(methods[i].accflags))
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break;
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Constructor *cons = new Constructor ();
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cons->offset = (char *) (&methods[i]) - (char *) methods;
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cons->declaringClass = this;
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return cons;
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}
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}
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throw new java::lang::NoSuchMethodException (_Jv_NewStringUtf8Const (init_name));
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}
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JArray<java::lang::reflect::Constructor *> *
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java::lang::Class::getDeclaredConstructors (jboolean publicOnly)
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{
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int numConstructors = 0;
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int max = isPrimitive () ? 0 : method_count;
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int i;
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for (i = max; --i >= 0; )
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{
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_Jv_Method *method = &methods[i];
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if (method->name == NULL
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|| ! _Jv_equalUtf8Consts (method->name, init_name))
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continue;
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if (publicOnly
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&& ! java::lang::reflect::Modifier::isPublic(method->accflags))
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continue;
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numConstructors++;
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}
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JArray<java::lang::reflect::Constructor *> *result
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= (JArray<java::lang::reflect::Constructor *> *)
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JvNewObjectArray (numConstructors,
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&java::lang::reflect::Constructor::class$,
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NULL);
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java::lang::reflect::Constructor** cptr = elements (result);
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for (i = 0; i < max; i++)
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{
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_Jv_Method *method = &methods[i];
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if (method->name == NULL
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|| ! _Jv_equalUtf8Consts (method->name, init_name))
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continue;
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if (publicOnly
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&& ! java::lang::reflect::Modifier::isPublic(method->accflags))
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continue;
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java::lang::reflect::Constructor *cons
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= new java::lang::reflect::Constructor ();
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cons->offset = (char *) method - (char *) methods;
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cons->declaringClass = this;
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*cptr++ = cons;
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}
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return result;
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}
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java::lang::reflect::Constructor *
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java::lang::Class::getDeclaredConstructor (JArray<jclass> *param_types)
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{
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memberAccessCheck(java::lang::reflect::Member::DECLARED);
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jstring partial_sig = getSignature (param_types, true);
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jint hash = partial_sig->hashCode ();
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int i = isPrimitive () ? 0 : method_count;
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while (--i >= 0)
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{
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if (_Jv_equalUtf8Consts (methods[i].name, init_name)
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&& _Jv_equal (methods[i].signature, partial_sig, hash))
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{
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// Found it.
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using namespace java::lang::reflect;
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Constructor *cons = new Constructor ();
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cons->offset = (char *) (&methods[i]) - (char *) methods;
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cons->declaringClass = this;
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return cons;
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}
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}
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throw new java::lang::NoSuchMethodException (_Jv_NewStringUtf8Const (init_name));
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}
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java::lang::reflect::Field *
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java::lang::Class::getField (jstring name, jint hash)
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{
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java::lang::reflect::Field* rfield;
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for (int i = 0; i < field_count; i++)
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{
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_Jv_Field *field = &fields[i];
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if (! _Jv_equal (field->name, name, hash))
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continue;
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if (! (field->getModifiers() & java::lang::reflect::Modifier::PUBLIC))
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continue;
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rfield = new java::lang::reflect::Field ();
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rfield->offset = (char*) field - (char*) fields;
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rfield->declaringClass = this;
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rfield->name = name;
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return rfield;
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}
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jclass superclass = getSuperclass();
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if (superclass == NULL)
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return NULL;
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rfield = superclass->getField(name, hash);
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for (int i = 0; i < interface_count && rfield == NULL; ++i)
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rfield = interfaces[i]->getField (name, hash);
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return rfield;
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}
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java::lang::reflect::Field *
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java::lang::Class::getDeclaredField (jstring name)
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{
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memberAccessCheck(java::lang::reflect::Member::DECLARED);
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int hash = name->hashCode();
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for (int i = 0; i < field_count; i++)
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{
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_Jv_Field *field = &fields[i];
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if (! _Jv_equal (field->name, name, hash))
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continue;
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java::lang::reflect::Field* rfield = new java::lang::reflect::Field ();
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rfield->offset = (char*) field - (char*) fields;
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rfield->declaringClass = this;
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rfield->name = name;
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return rfield;
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}
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throw new java::lang::NoSuchFieldException (name);
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}
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JArray<java::lang::reflect::Field *> *
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java::lang::Class::getDeclaredFields (jboolean public_only)
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{
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int size;
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if (public_only)
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{
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size = 0;
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for (int i = 0; i < field_count; ++i)
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{
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_Jv_Field *field = &fields[i];
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if ((field->flags & java::lang::reflect::Modifier::PUBLIC))
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++size;
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}
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}
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else
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size = field_count;
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JArray<java::lang::reflect::Field *> *result
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= (JArray<java::lang::reflect::Field *> *)
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JvNewObjectArray (size, &java::lang::reflect::Field::class$, NULL);
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java::lang::reflect::Field** fptr = elements (result);
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for (int i = 0; i < field_count; i++)
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{
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_Jv_Field *field = &fields[i];
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if (public_only
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&& ! (field->flags & java::lang::reflect::Modifier::PUBLIC))
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continue;
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java::lang::reflect::Field* rfield = new java::lang::reflect::Field ();
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rfield->offset = (char*) field - (char*) fields;
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rfield->declaringClass = this;
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*fptr++ = rfield;
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}
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return result;
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}
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void
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java::lang::Class::getSignature (java::lang::StringBuffer *buffer)
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{
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if (isPrimitive())
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buffer->append((jchar) method_count);
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else
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{
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jstring name = getName();
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if (name->charAt(0) != '[')
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buffer->append((jchar) 'L');
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buffer->append(name);
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if (name->charAt(0) != '[')
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buffer->append((jchar) ';');
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}
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}
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// This doesn't have to be native. It is an implementation detail
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// only called from the C++ code, though, so maybe this is clearer.
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jstring
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java::lang::Class::getSignature (JArray<jclass> *param_types,
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jboolean is_constructor)
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{
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java::lang::StringBuffer *buf = new java::lang::StringBuffer ();
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buf->append((jchar) '(');
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// A NULL param_types means "no parameters".
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if (param_types != NULL)
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{
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jclass *v = elements (param_types);
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for (int i = 0; i < param_types->length; ++i)
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v[i]->getSignature(buf);
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}
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buf->append((jchar) ')');
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if (is_constructor)
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buf->append((jchar) 'V');
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return buf->toString();
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}
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java::lang::reflect::Method *
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java::lang::Class::_getDeclaredMethod (jstring name,
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JArray<jclass> *param_types)
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{
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jstring partial_sig = getSignature (param_types, false);
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jint p_len = partial_sig->length();
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_Jv_Utf8Const *utf_name = _Jv_makeUtf8Const (name);
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int i = isPrimitive () ? 0 : method_count;
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while (--i >= 0)
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{
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if (_Jv_equalUtf8Consts (methods[i].name, utf_name)
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&& _Jv_equaln (methods[i].signature, partial_sig, p_len)
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&& (methods[i].accflags
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& java::lang::reflect::Modifier::INVISIBLE) == 0)
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{
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// Found it.
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using namespace java::lang::reflect;
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Method *rmethod = new Method ();
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rmethod->offset = (char*) (&methods[i]) - (char*) methods;
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rmethod->declaringClass = this;
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return rmethod;
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}
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}
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return NULL;
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}
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JArray<java::lang::reflect::Method *> *
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java::lang::Class::getDeclaredMethods (void)
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{
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memberAccessCheck(java::lang::reflect::Member::DECLARED);
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int numMethods = 0;
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int max = isPrimitive () ? 0 : method_count;
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int i;
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for (i = max; --i >= 0; )
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{
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_Jv_Method *method = &methods[i];
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if (method->name == NULL
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|| _Jv_equalUtf8Consts (method->name, clinit_name)
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|| _Jv_equalUtf8Consts (method->name, init_name)
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|| _Jv_equalUtf8Consts (method->name, finit_name)
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|| (methods[i].accflags
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& java::lang::reflect::Modifier::INVISIBLE) != 0)
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continue;
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numMethods++;
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}
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JArray<java::lang::reflect::Method *> *result
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= (JArray<java::lang::reflect::Method *> *)
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JvNewObjectArray (numMethods, &java::lang::reflect::Method::class$, NULL);
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java::lang::reflect::Method** mptr = elements (result);
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for (i = 0; i < max; i++)
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{
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_Jv_Method *method = &methods[i];
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if (method->name == NULL
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|| _Jv_equalUtf8Consts (method->name, clinit_name)
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|| _Jv_equalUtf8Consts (method->name, init_name)
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|| _Jv_equalUtf8Consts (method->name, finit_name)
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|| (methods[i].accflags
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& java::lang::reflect::Modifier::INVISIBLE) != 0)
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continue;
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java::lang::reflect::Method* rmethod
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= new java::lang::reflect::Method ();
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rmethod->offset = (char*) method - (char*) methods;
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rmethod->declaringClass = this;
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*mptr++ = rmethod;
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}
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return result;
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}
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jstring
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java::lang::Class::getName (void)
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{
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return name->toString();
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}
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JArray<jclass> *
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java::lang::Class::getDeclaredClasses (jboolean /*publicOnly*/)
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{
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// Until we have inner classes, it always makes sense to return an
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// empty array.
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JArray<jclass> *result
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= (JArray<jclass> *) JvNewObjectArray (0, &java::lang::Class::class$,
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NULL);
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return result;
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}
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jclass
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java::lang::Class::getDeclaringClass (void)
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{
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// Until we have inner classes, it makes sense to always return
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// NULL.
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return NULL;
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}
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JArray<jclass> *
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java::lang::Class::getInterfaces (void)
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{
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jobjectArray r = JvNewObjectArray (interface_count, getClass (), NULL);
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jobject *data = elements (r);
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for (int i = 0; i < interface_count; ++i)
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{
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typedef unsigned int uaddr __attribute__ ((mode (pointer)));
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data[i] = interfaces[i];
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if ((uaddr)data[i] < (uaddr)constants.size)
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fprintf (stderr, "ERROR !!!\n");
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}
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return reinterpret_cast<JArray<jclass> *> (r);
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}
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java::lang::reflect::Method *
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java::lang::Class::_getMethod (jstring name, JArray<jclass> *param_types)
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{
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jstring partial_sig = getSignature (param_types, false);
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jint p_len = partial_sig->length();
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_Jv_Utf8Const *utf_name = _Jv_makeUtf8Const (name);
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for (Class *klass = this; klass; klass = klass->getSuperclass())
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{
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int i = klass->isPrimitive () ? 0 : klass->method_count;
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while (--i >= 0)
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{
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if (_Jv_equalUtf8Consts (klass->methods[i].name, utf_name)
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&& _Jv_equaln (klass->methods[i].signature, partial_sig, p_len)
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&& (klass->methods[i].accflags
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& java::lang::reflect::Modifier::INVISIBLE) == 0)
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{
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// Found it.
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using namespace java::lang::reflect;
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// Method must be public.
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if (! Modifier::isPublic (klass->methods[i].accflags))
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break;
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Method *rmethod = new Method ();
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rmethod->offset = ((char *) (&klass->methods[i])
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- (char *) klass->methods);
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rmethod->declaringClass = klass;
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return rmethod;
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}
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}
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}
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// If we haven't found a match, and this class is an interface, then
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// check all the superinterfaces.
|
|
if (isInterface())
|
|
{
|
|
for (int i = 0; i < interface_count; ++i)
|
|
{
|
|
using namespace java::lang::reflect;
|
|
Method *rmethod = interfaces[i]->_getMethod (name, param_types);
|
|
if (rmethod != NULL)
|
|
return rmethod;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
// This is a very slow implementation, since it re-scans all the
|
|
// methods we've already listed to make sure we haven't duplicated a
|
|
// method. It also over-estimates the required size, so we have to
|
|
// shrink the result array later.
|
|
jint
|
|
java::lang::Class::_getMethods (JArray<java::lang::reflect::Method *> *result,
|
|
jint offset)
|
|
{
|
|
jint count = 0;
|
|
|
|
// First examine all local methods
|
|
for (int i = isPrimitive () ? 0 : method_count; --i >= 0; )
|
|
{
|
|
_Jv_Method *method = &methods[i];
|
|
if (method->name == NULL
|
|
|| _Jv_equalUtf8Consts (method->name, clinit_name)
|
|
|| _Jv_equalUtf8Consts (method->name, init_name)
|
|
|| _Jv_equalUtf8Consts (method->name, finit_name)
|
|
|| (method->accflags
|
|
& java::lang::reflect::Modifier::INVISIBLE) != 0)
|
|
continue;
|
|
// Only want public methods.
|
|
if (! java::lang::reflect::Modifier::isPublic (method->accflags))
|
|
continue;
|
|
|
|
// This is where we over-count the slots required if we aren't
|
|
// filling the result for real.
|
|
if (result != NULL)
|
|
{
|
|
jboolean add = true;
|
|
java::lang::reflect::Method **mp = elements (result);
|
|
// If we already have a method with this name and signature,
|
|
// then ignore this one. This can happen with virtual
|
|
// methods.
|
|
for (int j = 0; j < offset; ++j)
|
|
{
|
|
_Jv_Method *meth_2 = _Jv_FromReflectedMethod (mp[j]);
|
|
if (_Jv_equalUtf8Consts (method->name, meth_2->name)
|
|
&& _Jv_equalUtf8Consts (method->signature,
|
|
meth_2->signature))
|
|
{
|
|
add = false;
|
|
break;
|
|
}
|
|
}
|
|
if (! add)
|
|
continue;
|
|
}
|
|
|
|
if (result != NULL)
|
|
{
|
|
using namespace java::lang::reflect;
|
|
Method *rmethod = new Method ();
|
|
rmethod->offset = (char *) method - (char *) methods;
|
|
rmethod->declaringClass = this;
|
|
Method **mp = elements (result);
|
|
mp[offset + count] = rmethod;
|
|
}
|
|
++count;
|
|
}
|
|
offset += count;
|
|
|
|
// Now examine superclasses.
|
|
if (getSuperclass () != NULL)
|
|
{
|
|
jint s_count = getSuperclass()->_getMethods (result, offset);
|
|
offset += s_count;
|
|
count += s_count;
|
|
}
|
|
|
|
// Finally, examine interfaces.
|
|
for (int i = 0; i < interface_count; ++i)
|
|
{
|
|
int f_count = interfaces[i]->_getMethods (result, offset);
|
|
count += f_count;
|
|
offset += f_count;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
JArray<java::lang::reflect::Method *> *
|
|
java::lang::Class::getMethods (void)
|
|
{
|
|
using namespace java::lang::reflect;
|
|
|
|
memberAccessCheck(Member::PUBLIC);
|
|
|
|
// This will overestimate the size we need.
|
|
jint count = _getMethods (NULL, 0);
|
|
|
|
JArray<Method *> *result
|
|
= ((JArray<Method *> *) JvNewObjectArray (count,
|
|
&Method::class$,
|
|
NULL));
|
|
|
|
// When filling the array for real, we get the actual count. Then
|
|
// we resize the array.
|
|
jint real_count = _getMethods (result, 0);
|
|
|
|
if (real_count != count)
|
|
{
|
|
JArray<Method *> *r2
|
|
= ((JArray<Method *> *) JvNewObjectArray (real_count,
|
|
&Method::class$,
|
|
NULL));
|
|
|
|
Method **destp = elements (r2);
|
|
Method **srcp = elements (result);
|
|
|
|
for (int i = 0; i < real_count; ++i)
|
|
*destp++ = *srcp++;
|
|
|
|
result = r2;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
jboolean
|
|
java::lang::Class::isAssignableFrom (jclass klass)
|
|
{
|
|
// Arguments may not have been initialized, given ".class" syntax.
|
|
// This ensures we can at least look at their superclasses.
|
|
_Jv_Linker::wait_for_state (this, JV_STATE_LOADING);
|
|
_Jv_Linker::wait_for_state (klass, JV_STATE_LOADING);
|
|
return _Jv_IsAssignableFrom (klass, this);
|
|
}
|
|
|
|
jboolean
|
|
java::lang::Class::isInstance (jobject obj)
|
|
{
|
|
if (! obj)
|
|
return false;
|
|
return _Jv_IsAssignableFrom (JV_CLASS (obj), this);
|
|
}
|
|
|
|
jobject
|
|
java::lang::Class::newInstance (void)
|
|
{
|
|
memberAccessCheck(java::lang::reflect::Member::PUBLIC);
|
|
|
|
if (isPrimitive ()
|
|
|| isInterface ()
|
|
|| isArray ()
|
|
|| java::lang::reflect::Modifier::isAbstract(accflags))
|
|
throw new java::lang::InstantiationException (getName ());
|
|
|
|
_Jv_InitClass (this);
|
|
|
|
_Jv_Method *meth = _Jv_GetMethodLocal (this, init_name, void_signature);
|
|
if (! meth)
|
|
throw new java::lang::InstantiationException (getName());
|
|
|
|
jobject r = _Jv_AllocObject (this);
|
|
((void (*) (jobject)) meth->ncode) (r);
|
|
return r;
|
|
}
|
|
|
|
void
|
|
java::lang::Class::finalize (void)
|
|
{
|
|
engine->unregister(this);
|
|
}
|
|
|
|
// This implements the initialization process for a class. From Spec
|
|
// section 12.4.2.
|
|
void
|
|
java::lang::Class::initializeClass (void)
|
|
{
|
|
// Short-circuit to avoid needless locking (expression includes
|
|
// JV_STATE_PHANTOM and JV_STATE_DONE).
|
|
if (state >= JV_STATE_PHANTOM)
|
|
return;
|
|
|
|
// Step 1. We introduce a new scope so we can synchronize more
|
|
// easily.
|
|
{
|
|
JvSynchronize sync (this);
|
|
|
|
if (state < JV_STATE_LINKED)
|
|
{
|
|
try
|
|
{
|
|
_Jv_Linker::wait_for_state(this, JV_STATE_LINKED);
|
|
}
|
|
catch (java::lang::Throwable *x)
|
|
{
|
|
// Turn into a NoClassDefFoundError.
|
|
java::lang::NoClassDefFoundError *result
|
|
= new java::lang::NoClassDefFoundError(getName());
|
|
result->initCause(x);
|
|
throw result;
|
|
}
|
|
}
|
|
|
|
// Step 2.
|
|
java::lang::Thread *self = java::lang::Thread::currentThread();
|
|
self = (java::lang::Thread *) ((long) self | 1);
|
|
while (state == JV_STATE_IN_PROGRESS && thread && thread != self)
|
|
wait ();
|
|
|
|
// Steps 3 & 4.
|
|
if (state == JV_STATE_DONE || state == JV_STATE_IN_PROGRESS)
|
|
return;
|
|
|
|
// Step 5.
|
|
if (state == JV_STATE_ERROR)
|
|
throw new java::lang::NoClassDefFoundError (getName());
|
|
|
|
// Step 6.
|
|
thread = self;
|
|
_Jv_Linker::wait_for_state (this, JV_STATE_LINKED);
|
|
state = JV_STATE_IN_PROGRESS;
|
|
}
|
|
|
|
// Step 7.
|
|
if (! isInterface () && superclass)
|
|
{
|
|
try
|
|
{
|
|
_Jv_InitClass (superclass);
|
|
}
|
|
catch (java::lang::Throwable *except)
|
|
{
|
|
// Caught an exception.
|
|
JvSynchronize sync (this);
|
|
state = JV_STATE_ERROR;
|
|
notifyAll ();
|
|
throw except;
|
|
}
|
|
}
|
|
|
|
// Steps 8, 9, 10, 11.
|
|
try
|
|
{
|
|
_Jv_Method *meth = _Jv_GetMethodLocal (this, clinit_name,
|
|
void_signature);
|
|
if (meth)
|
|
((void (*) (void)) meth->ncode) ();
|
|
}
|
|
catch (java::lang::Throwable *except)
|
|
{
|
|
if (! java::lang::Error::class$.isInstance(except))
|
|
{
|
|
try
|
|
{
|
|
except = new ExceptionInInitializerError (except);
|
|
}
|
|
catch (java::lang::Throwable *t)
|
|
{
|
|
except = t;
|
|
}
|
|
}
|
|
|
|
JvSynchronize sync (this);
|
|
state = JV_STATE_ERROR;
|
|
notifyAll ();
|
|
throw except;
|
|
}
|
|
|
|
JvSynchronize sync (this);
|
|
state = JV_STATE_DONE;
|
|
notifyAll ();
|
|
}
|
|
|
|
// Only used by serialization
|
|
java::lang::reflect::Field *
|
|
java::lang::Class::getPrivateField (jstring name)
|
|
{
|
|
int hash = name->hashCode ();
|
|
|
|
java::lang::reflect::Field* rfield;
|
|
for (int i = 0; i < field_count; i++)
|
|
{
|
|
_Jv_Field *field = &fields[i];
|
|
if (! _Jv_equal (field->name, name, hash))
|
|
continue;
|
|
rfield = new java::lang::reflect::Field ();
|
|
rfield->offset = (char*) field - (char*) fields;
|
|
rfield->declaringClass = this;
|
|
rfield->name = name;
|
|
return rfield;
|
|
}
|
|
jclass superclass = getSuperclass();
|
|
if (superclass == NULL)
|
|
return NULL;
|
|
rfield = superclass->getPrivateField(name);
|
|
for (int i = 0; i < interface_count && rfield == NULL; ++i)
|
|
rfield = interfaces[i]->getPrivateField (name);
|
|
return rfield;
|
|
}
|
|
|
|
// Only used by serialization
|
|
java::lang::reflect::Method *
|
|
java::lang::Class::getPrivateMethod (jstring name, JArray<jclass> *param_types)
|
|
{
|
|
jstring partial_sig = getSignature (param_types, false);
|
|
jint p_len = partial_sig->length();
|
|
_Jv_Utf8Const *utf_name = _Jv_makeUtf8Const (name);
|
|
for (Class *klass = this; klass; klass = klass->getSuperclass())
|
|
{
|
|
int i = klass->isPrimitive () ? 0 : klass->method_count;
|
|
while (--i >= 0)
|
|
{
|
|
if (_Jv_equalUtf8Consts (klass->methods[i].name, utf_name)
|
|
&& _Jv_equaln (klass->methods[i].signature, partial_sig, p_len))
|
|
{
|
|
// Found it.
|
|
using namespace java::lang::reflect;
|
|
|
|
Method *rmethod = new Method ();
|
|
rmethod->offset = ((char *) (&klass->methods[i])
|
|
- (char *) klass->methods);
|
|
rmethod->declaringClass = klass;
|
|
return rmethod;
|
|
}
|
|
}
|
|
}
|
|
throw new java::lang::NoSuchMethodException (name);
|
|
}
|
|
|
|
// Private accessor method for Java code to retrieve the protection domain.
|
|
java::security::ProtectionDomain *
|
|
java::lang::Class::getProtectionDomain0 ()
|
|
{
|
|
return protectionDomain;
|
|
}
|
|
|
|
JArray<jobject> *
|
|
java::lang::Class::getSigners()
|
|
{
|
|
return hack_signers;
|
|
}
|
|
|
|
void
|
|
java::lang::Class::setSigners(JArray<jobject> *s)
|
|
{
|
|
hack_signers = s;
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// Some class-related convenience functions.
|
|
//
|
|
|
|
// Find a method declared in the class. If it is not declared locally
|
|
// (or if it is inherited), return NULL.
|
|
_Jv_Method *
|
|
_Jv_GetMethodLocal (jclass klass, _Jv_Utf8Const *name,
|
|
_Jv_Utf8Const *signature)
|
|
{
|
|
for (int i = 0; i < klass->method_count; ++i)
|
|
{
|
|
if (_Jv_equalUtf8Consts (name, klass->methods[i].name)
|
|
&& _Jv_equalUtf8Consts (signature, klass->methods[i].signature))
|
|
return &klass->methods[i];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
_Jv_Method *
|
|
_Jv_LookupDeclaredMethod (jclass klass, _Jv_Utf8Const *name,
|
|
_Jv_Utf8Const *signature,
|
|
jclass *declarer_result)
|
|
{
|
|
for (; klass; klass = klass->getSuperclass())
|
|
{
|
|
_Jv_Method *meth = _Jv_GetMethodLocal (klass, name, signature);
|
|
|
|
if (meth)
|
|
{
|
|
if (declarer_result)
|
|
*declarer_result = klass;
|
|
return meth;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef HAVE_TLS
|
|
|
|
// NOTE: MCACHE_SIZE should be a power of 2 minus one.
|
|
#define MCACHE_SIZE 31
|
|
|
|
struct _Jv_mcache
|
|
{
|
|
jclass klass;
|
|
_Jv_Method *method;
|
|
};
|
|
|
|
static __thread _Jv_mcache *method_cache;
|
|
#endif // HAVE_TLS
|
|
|
|
static void *
|
|
_Jv_FindMethodInCache (jclass klass MAYBE_UNUSED,
|
|
_Jv_Utf8Const *name MAYBE_UNUSED,
|
|
_Jv_Utf8Const *signature MAYBE_UNUSED)
|
|
{
|
|
#ifdef HAVE_TLS
|
|
_Jv_mcache *cache = method_cache;
|
|
if (cache)
|
|
{
|
|
int index = name->hash16 () & MCACHE_SIZE;
|
|
_Jv_mcache *mc = &cache[index];
|
|
_Jv_Method *m = mc->method;
|
|
|
|
if (mc->klass == klass
|
|
&& _Jv_equalUtf8Consts (m->name, name)
|
|
&& _Jv_equalUtf8Consts (m->signature, signature))
|
|
return mc->method->ncode;
|
|
}
|
|
#endif // HAVE_TLS
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
_Jv_AddMethodToCache (jclass klass MAYBE_UNUSED,
|
|
_Jv_Method *method MAYBE_UNUSED)
|
|
{
|
|
#ifdef HAVE_TLS
|
|
if (method_cache == NULL)
|
|
method_cache = (_Jv_mcache *) _Jv_MallocUnchecked((MCACHE_SIZE + 1)
|
|
* sizeof (_Jv_mcache));
|
|
// If the allocation failed, just keep going.
|
|
if (method_cache != NULL)
|
|
{
|
|
int index = method->name->hash16 () & MCACHE_SIZE;
|
|
method_cache[index].method = method;
|
|
method_cache[index].klass = klass;
|
|
}
|
|
#endif // HAVE_TLS
|
|
}
|
|
|
|
// Free this thread's method cache. We explicitly manage this memory
|
|
// as the GC does not yet know how to scan TLS on all platforms.
|
|
void
|
|
_Jv_FreeMethodCache ()
|
|
{
|
|
#ifdef HAVE_TLS
|
|
if (method_cache != NULL)
|
|
{
|
|
_Jv_Free(method_cache);
|
|
method_cache = NULL;
|
|
}
|
|
#endif // HAVE_TLS
|
|
}
|
|
|
|
void *
|
|
_Jv_LookupInterfaceMethod (jclass klass, _Jv_Utf8Const *name,
|
|
_Jv_Utf8Const *signature)
|
|
{
|
|
using namespace java::lang::reflect;
|
|
|
|
void *ncode = _Jv_FindMethodInCache (klass, name, signature);
|
|
if (ncode != 0)
|
|
return ncode;
|
|
|
|
for (; klass; klass = klass->getSuperclass())
|
|
{
|
|
_Jv_Method *meth = _Jv_GetMethodLocal (klass, name, signature);
|
|
if (! meth)
|
|
continue;
|
|
|
|
if (Modifier::isStatic(meth->accflags))
|
|
throw new java::lang::IncompatibleClassChangeError
|
|
(_Jv_GetMethodString (klass, meth));
|
|
if (Modifier::isAbstract(meth->accflags))
|
|
throw new java::lang::AbstractMethodError
|
|
(_Jv_GetMethodString (klass, meth));
|
|
if (! Modifier::isPublic(meth->accflags))
|
|
throw new java::lang::IllegalAccessError
|
|
(_Jv_GetMethodString (klass, meth));
|
|
|
|
_Jv_AddMethodToCache (klass, meth);
|
|
|
|
return meth->ncode;
|
|
}
|
|
throw new java::lang::IncompatibleClassChangeError;
|
|
}
|
|
|
|
// Fast interface method lookup by index.
|
|
void *
|
|
_Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface, int method_idx)
|
|
{
|
|
_Jv_IDispatchTable *cldt = klass->idt;
|
|
int idx = iface->ioffsets[cldt->iindex] + method_idx;
|
|
return cldt->itable[idx];
|
|
}
|
|
|
|
jboolean
|
|
_Jv_IsAssignableFrom (jclass source, jclass target)
|
|
{
|
|
if (source == target)
|
|
return true;
|
|
|
|
// If target is array, so must source be.
|
|
while (target->isArray ())
|
|
{
|
|
if (! source->isArray())
|
|
return false;
|
|
target = target->getComponentType();
|
|
source = source->getComponentType();
|
|
}
|
|
|
|
if (target->isInterface())
|
|
{
|
|
// Abstract classes have no IDT, and IDTs provide no way to check
|
|
// two interfaces for assignability.
|
|
if (__builtin_expect
|
|
(source->idt == NULL || source->isInterface(), false))
|
|
return _Jv_InterfaceAssignableFrom (source, target);
|
|
|
|
_Jv_IDispatchTable *cl_idt = source->idt;
|
|
|
|
if (__builtin_expect ((target->ioffsets == NULL), false))
|
|
return false; // No class implementing TARGET has been loaded.
|
|
jshort cl_iindex = cl_idt->iindex;
|
|
if (cl_iindex < target->ioffsets[0])
|
|
{
|
|
jshort offset = target->ioffsets[cl_iindex];
|
|
if (offset != -1 && offset < cl_idt->itable_length
|
|
&& cl_idt->itable[offset] == target)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Primitive TYPE classes are only assignable to themselves.
|
|
if (__builtin_expect (target->isPrimitive() || source->isPrimitive(), false))
|
|
return false;
|
|
|
|
if (target == &java::lang::Object::class$)
|
|
return true;
|
|
else if (source->ancestors == NULL || target->ancestors == NULL)
|
|
{
|
|
// We need this case when either SOURCE or TARGET has not has
|
|
// its constant-time tables prepared.
|
|
|
|
// At this point we know that TARGET can't be Object, so it is
|
|
// safe to use that as the termination point.
|
|
while (source && source != &java::lang::Object::class$)
|
|
{
|
|
if (source == target)
|
|
return true;
|
|
source = source->getSuperclass();
|
|
}
|
|
}
|
|
else if (source->depth >= target->depth
|
|
&& source->ancestors[source->depth - target->depth] == target)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
// Interface type checking, the slow way. Returns TRUE if IFACE is a
|
|
// superinterface of SOURCE. This is used when SOURCE is also an interface,
|
|
// or a class with no interface dispatch table.
|
|
jboolean
|
|
_Jv_InterfaceAssignableFrom (jclass source, jclass iface)
|
|
{
|
|
for (int i = 0; i < source->interface_count; i++)
|
|
{
|
|
jclass interface = source->interfaces[i];
|
|
if (iface == interface
|
|
|| _Jv_InterfaceAssignableFrom (interface, iface))
|
|
return true;
|
|
}
|
|
|
|
if (!source->isInterface()
|
|
&& source->superclass
|
|
&& _Jv_InterfaceAssignableFrom (source->superclass, iface))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
jboolean
|
|
_Jv_IsInstanceOf(jobject obj, jclass cl)
|
|
{
|
|
if (__builtin_expect (!obj, false))
|
|
return false;
|
|
return _Jv_IsAssignableFrom (JV_CLASS (obj), cl);
|
|
}
|
|
|
|
void *
|
|
_Jv_CheckCast (jclass c, jobject obj)
|
|
{
|
|
if (__builtin_expect
|
|
(obj != NULL && ! _Jv_IsAssignableFrom(JV_CLASS (obj), c), false))
|
|
throw new java::lang::ClassCastException
|
|
((new java::lang::StringBuffer
|
|
(obj->getClass()->getName()))->append
|
|
(JvNewStringUTF(" cannot be cast to "))->append
|
|
(c->getName())->toString());
|
|
|
|
return obj;
|
|
}
|
|
|
|
void
|
|
_Jv_CheckArrayStore (jobject arr, jobject obj)
|
|
{
|
|
if (obj)
|
|
{
|
|
JvAssert (arr != NULL);
|
|
jclass elt_class = (JV_CLASS (arr))->getComponentType();
|
|
if (elt_class == &java::lang::Object::class$)
|
|
return;
|
|
jclass obj_class = JV_CLASS (obj);
|
|
if (__builtin_expect
|
|
(! _Jv_IsAssignableFrom (obj_class, elt_class), false))
|
|
throw new java::lang::ArrayStoreException
|
|
((new java::lang::StringBuffer
|
|
(JvNewStringUTF("Cannot store ")))->append
|
|
(obj_class->getName())->append
|
|
(JvNewStringUTF(" in array of type "))->append
|
|
(elt_class->getName())->toString());
|
|
}
|
|
}
|
|
|
|
jboolean
|
|
_Jv_IsAssignableFromSlow (jclass source, jclass target)
|
|
{
|
|
// First, strip arrays.
|
|
while (target->isArray ())
|
|
{
|
|
// If target is array, source must be as well.
|
|
if (! source->isArray ())
|
|
return false;
|
|
target = target->getComponentType ();
|
|
source = source->getComponentType ();
|
|
}
|
|
|
|
// Quick success.
|
|
if (target == &java::lang::Object::class$)
|
|
return true;
|
|
|
|
// Ensure that the classes have their supers installed.
|
|
_Jv_Linker::wait_for_state (source, JV_STATE_LOADING);
|
|
_Jv_Linker::wait_for_state (target, JV_STATE_LOADING);
|
|
|
|
do
|
|
{
|
|
if (source == target)
|
|
return true;
|
|
|
|
if (target->isPrimitive () || source->isPrimitive ())
|
|
return false;
|
|
|
|
if (target->isInterface ())
|
|
{
|
|
for (int i = 0; i < source->interface_count; ++i)
|
|
{
|
|
// We use a recursive call because we also need to
|
|
// check superinterfaces.
|
|
if (_Jv_IsAssignableFromSlow (source->getInterface (i), target))
|
|
return true;
|
|
}
|
|
}
|
|
source = source->getSuperclass ();
|
|
}
|
|
while (source != NULL);
|
|
|
|
return false;
|
|
}
|
|
|
|
// Lookup an interface method by name. This is very similar to
|
|
// purpose to _getMethod, but the interfaces are quite different. It
|
|
// might be a good idea for _getMethod to call this function.
|
|
//
|
|
// Return true of the method is found, with the class in FOUND_CLASS
|
|
// and the index in INDEX.
|
|
bool
|
|
_Jv_getInterfaceMethod (jclass search_class, jclass &found_class, int &index,
|
|
const _Jv_Utf8Const *utf_name,
|
|
const _Jv_Utf8Const *utf_sig)
|
|
{
|
|
for (jclass klass = search_class; klass; klass = klass->getSuperclass())
|
|
{
|
|
// FIXME: Throw an exception?
|
|
if (!klass->isInterface ())
|
|
return false;
|
|
|
|
int max = klass->method_count;
|
|
int offset = 0;
|
|
for (int i = 0; i < max; ++i)
|
|
{
|
|
// Skip <clinit> here, as it will not be in the IDT.
|
|
if (klass->methods[i].name->first() == '<')
|
|
continue;
|
|
|
|
if (_Jv_equalUtf8Consts (klass->methods[i].name, utf_name)
|
|
&& _Jv_equalUtf8Consts (klass->methods[i].signature, utf_sig))
|
|
{
|
|
// Found it.
|
|
using namespace java::lang::reflect;
|
|
|
|
// FIXME: Method must be public. Throw an exception?
|
|
if (! Modifier::isPublic (klass->methods[i].accflags))
|
|
break;
|
|
|
|
found_class = klass;
|
|
// Interface method indexes count from 1.
|
|
index = offset + 1;
|
|
return true;
|
|
}
|
|
|
|
++offset;
|
|
}
|
|
}
|
|
|
|
// If we haven't found a match, and this class is an interface, then
|
|
// check all the superinterfaces.
|
|
if (search_class->isInterface())
|
|
{
|
|
for (int i = 0; i < search_class->interface_count; ++i)
|
|
{
|
|
using namespace java::lang::reflect;
|
|
bool found = _Jv_getInterfaceMethod (search_class->interfaces[i],
|
|
found_class, index,
|
|
utf_name, utf_sig);
|
|
if (found)
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
#ifdef INTERPRETER
|
|
_Jv_InterpMethod*
|
|
_Jv_FindInterpreterMethod (jclass klass, jmethodID desired_method)
|
|
{
|
|
using namespace java::lang::reflect;
|
|
|
|
_Jv_InterpClass* iclass
|
|
= reinterpret_cast<_Jv_InterpClass*> (klass->aux_info);
|
|
_Jv_MethodBase** imethods = _Jv_GetFirstMethod (iclass);
|
|
|
|
for (int i = 0; i < JvNumMethods (klass); ++i)
|
|
{
|
|
_Jv_MethodBase* imeth = imethods[i];
|
|
_Jv_ushort accflags = klass->methods[i].accflags;
|
|
if ((accflags & (Modifier::NATIVE | Modifier::ABSTRACT)) == 0)
|
|
{
|
|
_Jv_InterpMethod* im = reinterpret_cast<_Jv_InterpMethod*> (imeth);
|
|
if (im->get_method () == desired_method)
|
|
return im;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
#endif
|