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1 /*
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2 * Copyright 2001-2003 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.interpreter;
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26
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27 import sun.jvm.hotspot.oops.*;
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28 import sun.jvm.hotspot.runtime.*;
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29 import sun.jvm.hotspot.utilities.*;
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30
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31 public class BytecodeInvoke extends BytecodeWithCPIndex {
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32 BytecodeInvoke(Method method, int bci) {
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33 super(method, bci);
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34 }
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35
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36 public static BytecodeInvoke at(Method method, int bci) {
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37 BytecodeInvoke b = new BytecodeInvoke(method, bci);
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38 if (Assert.ASSERTS_ENABLED) {
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39 b.verify();
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40 }
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41 return b;
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42 }
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43
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44 /** Like at, but returns null if the BCI is not at an invoke */
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45 public static BytecodeInvoke atCheck(Method method, int bci) {
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46 BytecodeInvoke b = new BytecodeInvoke(method, bci);
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47 return (b.isValid() ? b : null);
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48 }
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49
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50 public static BytecodeInvoke at(BytecodeStream bcs) {
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51 return new BytecodeInvoke(bcs.method(), bcs.bci());
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52 }
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53
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54 // returns the name of the invoked method
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55 public Symbol name() {
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56 ConstantPool cp = method().getConstants();
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57 return cp.getNameRefAt(index());
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58 }
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59
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60 // returns the signature of the invoked method
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61 public Symbol signature() {
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62 ConstantPool cp = method().getConstants();
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63 return cp.getSignatureRefAt(index());
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64 }
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65
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66 public Method getInvokedMethod() {
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67 return method().getConstants().getMethodRefAt(index());
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68 }
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69
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70 // returns the result type (see BasicType.java) of the invoke
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71 public int resultType() {
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72 ResultTypeFinder rts = new ResultTypeFinder(signature());
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73 rts.iterate();
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74 return rts.type();
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75 }
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76
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77 public int adjustedInvokeCode() {
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78 return javaCode();
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79 }
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80
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81 // "specified" method (from constant pool)
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82 // FIXME: elided for now
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83 // public Method staticTarget();
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84
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85 // Testers
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86 public boolean isInvokeinterface() { return adjustedInvokeCode() == Bytecodes._invokeinterface; }
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87 public boolean isInvokevirtual() { return adjustedInvokeCode() == Bytecodes._invokevirtual; }
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88 public boolean isInvokestatic() { return adjustedInvokeCode() == Bytecodes._invokestatic; }
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89 public boolean isInvokespecial() { return adjustedInvokeCode() == Bytecodes._invokespecial; }
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90
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91 public boolean isValid() { return isInvokeinterface() ||
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92 isInvokevirtual() ||
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93 isInvokestatic() ||
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94 isInvokespecial(); }
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95 public void verify() {
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96 if (Assert.ASSERTS_ENABLED) {
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97 Assert.that(isValid(), "check invoke");
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98 }
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99 }
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100
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101 public String toString() {
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102 StringBuffer buf = new StringBuffer();
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103 buf.append(getJavaBytecodeName());
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104 buf.append(spaces);
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105 buf.append('#');
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106 buf.append(Integer.toString(indexForFieldOrMethod()));
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107 buf.append(" [Method ");
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108 StringBuffer sigBuf = new StringBuffer();
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109 new SignatureConverter(signature(), sigBuf).iterateReturntype();
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110 buf.append(sigBuf.toString().replace('/', '.'));
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111 buf.append(spaces);
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112 buf.append(name().asString());
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113 buf.append('(');
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114 sigBuf = new StringBuffer();
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115 new SignatureConverter(signature(), sigBuf).iterateParameters();
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116 buf.append(sigBuf.toString().replace('/', '.'));
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117 buf.append(')');
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118 buf.append(']');
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119 if (code() != javaCode()) {
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120 buf.append(spaces);
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121 buf.append('[');
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122 buf.append(getBytecodeName());
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123 buf.append(']');
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124 }
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125 return buf.toString();
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126 }
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127 }
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