1 /* 2 * Copyright (c) 2010, 2013, 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 /* 27 * This file is available under and governed by the GNU General Public 28 * License version 2 only, as published by the Free Software Foundation. 29 * However, the following notice accompanied the original version of this 30 * file, and Oracle licenses the original version of this file under the BSD 31 * license: 32 */ 33 /* 34 Copyright 2009-2013 Attila Szegedi 35 36 Licensed under both the Apache License, Version 2.0 (the "Apache License") 37 and the BSD License (the "BSD License"), with licensee being free to 38 choose either of the two at their discretion. 39 40 You may not use this file except in compliance with either the Apache 41 License or the BSD License. 42 43 If you choose to use this file in compliance with the Apache License, the 44 following notice applies to you: 45 46 You may obtain a copy of the Apache License at 47 48 http://www.apache.org/licenses/LICENSE-2.0 49 50 Unless required by applicable law or agreed to in writing, software 51 distributed under the License is distributed on an "AS IS" BASIS, 52 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 53 implied. See the License for the specific language governing 54 permissions and limitations under the License. 55 56 If you choose to use this file in compliance with the BSD License, the 57 following notice applies to you: 58 59 Redistribution and use in source and binary forms, with or without 60 modification, are permitted provided that the following conditions are 61 met: 62 * Redistributions of source code must retain the above copyright 63 notice, this list of conditions and the following disclaimer. 64 * Redistributions in binary form must reproduce the above copyright 65 notice, this list of conditions and the following disclaimer in the 66 documentation and/or other materials provided with the distribution. 67 * Neither the name of the copyright holder nor the names of 68 contributors may be used to endorse or promote products derived from 69 this software without specific prior written permission. 70 71 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 72 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 73 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 74 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER 75 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 76 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 77 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 78 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 79 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 80 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 81 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 82 */ 83 84 package jdk.internal.dynalink.support; 85 86 import jdk.internal.dynalink.CallSiteDescriptor; 87 import jdk.internal.dynalink.linker.LinkRequest; 88 89 /** 90 * A link request implementation for call sites that pass language runtime specific context arguments on the stack. The 91 * context specific arguments should be the first "n" arguments. 92 * 93 * @author Attila Szegedi 94 */ 95 public class RuntimeContextLinkRequestImpl extends LinkRequestImpl { 96 97 private final int runtimeContextArgCount; 98 private LinkRequestImpl contextStrippedRequest; 99 100 /** 101 * Creates a new link request. 102 * 103 * @param callSiteDescriptor the descriptor for the call site being linked 104 * @param callSiteToken the opaque token for the call site being linked. 105 * @param arguments the arguments for the invocation 106 * @param linkCount number of times callsite has been linked/relinked 107 * @param callSiteUnstable true if the call site being linked is considered unstable 108 * @param runtimeContextArgCount the number of the leading arguments on the stack that represent the language 109 * runtime specific context arguments. 110 * @throws IllegalArgumentException if runtimeContextArgCount is less than 1. 111 */ RuntimeContextLinkRequestImpl(final CallSiteDescriptor callSiteDescriptor, final Object callSiteToken, final int linkCount, final boolean callSiteUnstable, final Object[] arguments, final int runtimeContextArgCount)112 public RuntimeContextLinkRequestImpl(final CallSiteDescriptor callSiteDescriptor, final Object callSiteToken, 113 final int linkCount, final boolean callSiteUnstable, final Object[] arguments, final int runtimeContextArgCount) { 114 super(callSiteDescriptor, callSiteToken, linkCount, callSiteUnstable, arguments); 115 if(runtimeContextArgCount < 1) { 116 throw new IllegalArgumentException("runtimeContextArgCount < 1"); 117 } 118 this.runtimeContextArgCount = runtimeContextArgCount; 119 } 120 121 @Override withoutRuntimeContext()122 public LinkRequest withoutRuntimeContext() { 123 if(contextStrippedRequest == null) { 124 contextStrippedRequest = 125 new LinkRequestImpl(CallSiteDescriptorFactory.dropParameterTypes(getCallSiteDescriptor(), 1, 126 runtimeContextArgCount + 1), getCallSiteToken(), getLinkCount(), isCallSiteUnstable(), getTruncatedArguments()); 127 } 128 return contextStrippedRequest; 129 } 130 131 @Override replaceArguments(final CallSiteDescriptor callSiteDescriptor, final Object[] arguments)132 public LinkRequest replaceArguments(final CallSiteDescriptor callSiteDescriptor, final Object[] arguments) { 133 return new RuntimeContextLinkRequestImpl(callSiteDescriptor, getCallSiteToken(), getLinkCount(), isCallSiteUnstable(), arguments, 134 runtimeContextArgCount); 135 } 136 getTruncatedArguments()137 private Object[] getTruncatedArguments() { 138 final Object[] args = getArguments(); 139 final Object[] newargs = new Object[args.length - runtimeContextArgCount]; 140 newargs[0] = args[0]; // "this" remains at the 0th position 141 System.arraycopy(args, runtimeContextArgCount + 1, newargs, 1, newargs.length - 1); 142 return newargs; 143 } 144 } 145