--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.dynalink/share/classes/jdk/dynalink/beans/CallerSensitiveDynamicMethod.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,187 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file, and Oracle licenses the original version of this file under the BSD
+ * license:
+ */
+/*
+ Copyright 2009-2013 Attila Szegedi
+
+ Licensed under both the Apache License, Version 2.0 (the "Apache License")
+ and the BSD License (the "BSD License"), with licensee being free to
+ choose either of the two at their discretion.
+
+ You may not use this file except in compliance with either the Apache
+ License or the BSD License.
+
+ If you choose to use this file in compliance with the Apache License, the
+ following notice applies to you:
+
+ You may obtain a copy of the Apache License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied. See the License for the specific language governing
+ permissions and limitations under the License.
+
+ If you choose to use this file in compliance with the BSD License, the
+ following notice applies to you:
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ * Neither the name of the copyright holder nor the names of
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
+ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+package jdk.dynalink.beans;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.AccessibleObject;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Executable;
+import java.lang.reflect.Member;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.security.AccessControlContext;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import jdk.dynalink.CallSiteDescriptor;
+import jdk.dynalink.SecureLookupSupplier;
+import jdk.dynalink.internal.AccessControlContextFactory;
+import jdk.dynalink.linker.support.Lookup;
+import jdk.internal.reflect.CallerSensitive;
+
+
+/**
+ * A dynamic method bound to exactly one Java method or constructor that is caller sensitive. Since the target method is
+ * caller sensitive, it doesn't cache a method handle but rather uses the passed lookup object in
+ * {@link #getTarget(CallSiteDescriptor)} to unreflect a method handle from the reflective member on
+ * every request.
+ */
+class CallerSensitiveDynamicMethod extends SingleDynamicMethod {
+ private static final AccessControlContext GET_LOOKUP_CONTEXT =
+ AccessControlContextFactory.createAccessControlContext(
+ SecureLookupSupplier.GET_LOOKUP_PERMISSION_NAME);
+
+ // Typed as "AccessibleObject" as it can be either a method or a constructor.
+ // If we were Java8-only, we could use java.lang.reflect.Executable
+ private final AccessibleObject target;
+ private final MethodType type;
+
+ CallerSensitiveDynamicMethod(final AccessibleObject target) {
+ super(getName(target));
+ this.target = target;
+ this.type = getMethodType(target);
+ }
+
+ private static String getName(final AccessibleObject target) {
+ final Member m = (Member)target;
+ final boolean constructor = m instanceof Constructor;
+ return getMethodNameWithSignature(getMethodType(target), constructor ? m.getName() :
+ getClassAndMethodName(m.getDeclaringClass(), m.getName()), !constructor);
+ }
+
+ @Override
+ MethodType getMethodType() {
+ return type;
+ }
+
+ private static MethodType getMethodType(final AccessibleObject ao) {
+ final boolean isMethod = ao instanceof Method;
+ final Class<?> rtype = isMethod ? ((Method)ao).getReturnType() : ((Constructor<?>)ao).getDeclaringClass();
+ final Class<?>[] ptypes = isMethod ? ((Method)ao).getParameterTypes() : ((Constructor<?>)ao).getParameterTypes();
+ final MethodType type = MethodType.methodType(rtype, ptypes);
+ final Member m = (Member)ao;
+ return type.insertParameterTypes(0,
+ isMethod ?
+ Modifier.isStatic(m.getModifiers()) ?
+ Object.class :
+ m.getDeclaringClass() :
+ StaticClass.class);
+ }
+
+ @Override
+ boolean isVarArgs() {
+ return target instanceof Method ? ((Method)target).isVarArgs() : ((Constructor<?>)target).isVarArgs();
+ }
+
+ @Override
+ MethodHandle getTarget(final CallSiteDescriptor desc) {
+ final MethodHandles.Lookup lookup = AccessController.doPrivileged(
+ (PrivilegedAction<MethodHandles.Lookup>)()->desc.getLookup(),
+ GET_LOOKUP_CONTEXT);
+
+ if(target instanceof Method) {
+ final MethodHandle mh = unreflect(lookup, (Method)target);
+ if(Modifier.isStatic(((Member)target).getModifiers())) {
+ return StaticClassIntrospector.editStaticMethodHandle(mh);
+ }
+ return mh;
+ }
+ return StaticClassIntrospector.editConstructorMethodHandle(unreflectConstructor(lookup,
+ (Constructor<?>)target));
+ }
+
+ @Override
+ boolean isConstructor() {
+ return target instanceof Constructor;
+ }
+
+ private static MethodHandle unreflect(final MethodHandles.Lookup lookup, final Method m) {
+ return Lookup.unreflect(lookup, m);
+ }
+
+ private static MethodHandle unreflectConstructor(final MethodHandles.Lookup lookup, final Constructor<?> c) {
+ return Lookup.unreflectConstructor(lookup, c);
+ }
+}