1 /* 2 * Copyright (c) 2013, 2018, 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 24 package vm.runtime.defmeth.shared.data.method.body; 25 26 import vm.runtime.defmeth.shared.data.method.param.Param; 27 import jdk.internal.org.objectweb.asm.Opcodes; 28 import vm.runtime.defmeth.shared.data.Visitor; 29 import vm.runtime.defmeth.shared.data.Clazz; 30 import vm.runtime.defmeth.shared.data.Interface; 31 32 /** 33 * Represents arbitrary method call (invoke*). 34 */ 35 public class CallMethod implements MethodBody { 36 37 /** Invocation byte code instruction */ 38 public static enum Invoke { 39 VIRTUAL( Opcodes.INVOKEVIRTUAL, "INVOKEVIRTUAL", 5), 40 INTERFACE( Opcodes.INVOKEINTERFACE, "INVOKEINTERFACE", 9), 41 SPECIAL( Opcodes.INVOKESPECIAL, "INVOKESPECIAL", 7), 42 STATIC( Opcodes.INVOKESTATIC, "INVOKESTATIC", 6); 43 44 private final int opcode; 45 private final String name; 46 47 // Kind Description Interpretation 48 // 1 REF_getField, getfield C.f:T 49 // 2 REF_getStatic getstatic C.f:T 50 // 3 REF_putField putfield C.f:T 51 // 4 REF_putStatic putstatic C.f:T 52 // 5 REF_invokeVirtual invokevirtual C.m:(A*)T 53 // 6 REF_invokeStatic invokestatic C.m:(A*)T 54 // 7 REF_invokeSpecial invokespecial C.m:(A*)T 55 // 8 REF_newInvokeSpecial new C; dup; invokespecial C.<init>:(A*)void 56 // 9 REF_invokeInterface invokeinterface C.m:(A*)T 57 private final int tag; 58 Invoke(int opcode, String name, int tag)59 Invoke(int opcode, String name, int tag) { 60 this.opcode = opcode; 61 this.name = name; 62 this.tag = tag; 63 } 64 opcode()65 public int opcode() { 66 return opcode; 67 } 68 69 @Override toString()70 public String toString() { 71 return name; 72 } 73 tag()74 public int tag() { 75 return tag; 76 } 77 } 78 79 /** At callsite direct visitMethodInsn() to issue a CONSTANT_Methodref, 80 a CONSTANT_InterfaceMethodref or let it be determined at the 81 callsite if the callee is an instance of an Interface */ 82 public static enum IndexbyteOp { 83 METHODREF, 84 INTERFACEMETHODREF, 85 CALLSITE 86 } 87 88 /** Invoke instruction which should be used for the call */ 89 final Invoke invokeInsn; 90 91 /** Static receiver class */ 92 final Clazz staticClass; 93 94 /** Dynamic receiver class */ 95 final Clazz receiverClass; 96 97 /** Name of the method to be invoked*/ 98 final String methodName; 99 100 /** Descriptor of the method to be invoked */ 101 final String methodDesc; 102 103 /** Parameter values */ 104 final Param[] params; 105 106 /** Name of method's return type */ 107 final String returnType; 108 109 /** Should return value be popped off the stack after the call */ 110 final boolean popReturnValue; 111 112 /** Indexbyte operand to generate at call site */ 113 final IndexbyteOp generateIndexbyteOp; 114 CallMethod(Invoke invokeInsn, Clazz staticClass, Clazz receiverClass, String methodName, String methodDesc, Param[] params, String returnType, boolean popReturnValue, IndexbyteOp generateIndexbyteOp)115 public CallMethod(Invoke invokeInsn, Clazz staticClass, Clazz receiverClass, 116 String methodName, String methodDesc, Param[] params, 117 String returnType, boolean popReturnValue, 118 IndexbyteOp generateIndexbyteOp) { 119 this.invokeInsn = invokeInsn; 120 this.staticClass = staticClass; 121 this.receiverClass = receiverClass; 122 this.methodName = methodName; 123 this.methodDesc = methodDesc; 124 this.params = params; 125 this.returnType = returnType; 126 this.popReturnValue = popReturnValue; 127 this.generateIndexbyteOp = generateIndexbyteOp; 128 } 129 popReturnValue()130 public boolean popReturnValue() { 131 return popReturnValue; 132 } 133 generateIndexbyteOp()134 public IndexbyteOp generateIndexbyteOp() { 135 return generateIndexbyteOp; 136 } 137 invokeInsn()138 public Invoke invokeInsn() { 139 return invokeInsn; 140 } 141 staticClass()142 public Clazz staticClass() { 143 return staticClass; 144 } 145 receiverClass()146 public Clazz receiverClass() { 147 return receiverClass; 148 } 149 methodName()150 public String methodName() { 151 return methodName; 152 } 153 methodDesc()154 public String methodDesc() { 155 return methodDesc; 156 } 157 params()158 public Param[] params() { 159 return params; 160 } 161 returnType()162 public String returnType() { 163 return returnType; 164 } 165 isInterface()166 public boolean isInterface() { 167 return generateIndexbyteOp() == IndexbyteOp.METHODREF ? 168 false : 169 (generateIndexbyteOp() == IndexbyteOp.INTERFACEMETHODREF ? 170 true : 171 staticClass() instanceof Interface); 172 } 173 174 @Override visit(Visitor v)175 public void visit(Visitor v) { 176 v.visitCallMethod(this); 177 } 178 } 179