1 /* 2 * Copyright (c) 2015, 2016, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.hotspot.services; 24 25 import jdk.vm.ci.code.CompiledCode; 26 import jdk.vm.ci.code.InstalledCode; 27 import jdk.vm.ci.hotspot.HotSpotCodeCacheProvider; 28 import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime; 29 import jdk.vm.ci.meta.JVMCIMetaAccessContext; 30 import jdk.vm.ci.meta.ResolvedJavaType; 31 import jdk.vm.ci.services.JVMCIPermission; 32 33 /** 34 * Service-provider class for responding to VM events and for creating 35 * {@link JVMCIMetaAccessContext}s. 36 */ 37 public abstract class HotSpotVMEventListener { 38 39 private static Void checkPermission() { 40 SecurityManager sm = System.getSecurityManager(); 41 if (sm != null) { 42 sm.checkPermission(new JVMCIPermission()); 43 } 44 return null; 45 } 46 47 @SuppressWarnings("unused") 48 HotSpotVMEventListener(Void ignore) { 49 } 50 51 /** 52 * Initializes a new instance of this class. 53 * 54 * @throws SecurityException if a security manager has been installed and it denies 55 * {@link JVMCIPermission} 56 */ 57 protected HotSpotVMEventListener() { 58 this(checkPermission()); 59 } 60 61 /** 62 * Notifies this client that the VM is shutting down. 63 */ 64 public void notifyShutdown() { 65 } 66 67 /** 68 * Notify on successful install into the code cache. 69 * 70 * @param hotSpotCodeCacheProvider 71 * @param installedCode 72 * @param compiledCode 73 */ 74 public void notifyInstall(HotSpotCodeCacheProvider hotSpotCodeCacheProvider, InstalledCode installedCode, CompiledCode compiledCode) { 75 } 76 77 /** 78 * Notify on completion of a bootstrap. 79 */ 80 public void notifyBootstrapFinished() { 81 } 82 83 /** 84 * Create a custom {@link JVMCIMetaAccessContext} to be used for managing the lifetime of loaded 85 * metadata. It a custom one isn't created then the default implementation will be a single 86 * context with globally shared instances of {@link ResolvedJavaType} that are never released. 87 * 88 * @param runtime the runtime instance that will use the returned context 89 * @return a custom context or null 90 */ 91 public JVMCIMetaAccessContext createMetaAccessContext(HotSpotJVMCIRuntime runtime) { 92 return null; 93 } 94 }