1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 import java.util.List; 27 import jdk.dynalink.CallSiteDescriptor; 28 import jdk.dynalink.linker.GuardingDynamicLinker; 29 import jdk.dynalink.linker.GuardingDynamicLinkerExporter; 30 import jdk.dynalink.linker.LinkRequest; 31 import jdk.dynalink.linker.LinkerServices; 32 33 /** 34 * A trusted linker exporter (build file gives appropriate permission to the jar containing this class!). 35 */ 36 public final class TestGuardingDynamicLinkerExporter extends GuardingDynamicLinkerExporter { 37 38 private static final ThreadLocal<CallSiteDescriptor> lastDescriptor = new ThreadLocal<>(); 39 private static boolean enabled = false; 40 41 public static void enable() { 42 reset(true); 43 } 44 45 public static void disable() { 46 reset(false); 47 } 48 public static boolean isLastCallSiteDescriptor(final CallSiteDescriptor desc) { 49 return lastDescriptor.get() == desc; 50 } 51 52 private static void reset(final boolean enable) { 53 lastDescriptor.set(null); 54 enabled = enable; 55 } 56 57 @Override 58 public List<GuardingDynamicLinker> get() { 59 return List.of(((final LinkRequest linkRequest, final LinkerServices linkerServices) -> { 60 if (enabled) { 61 lastDescriptor.set(linkRequest.getCallSiteDescriptor()); 62 } 63 return null; 64 })); 65 } 66 }