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1 /* |
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2 * Copyright (c) 2010, 2017, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 package test.java.lang.invoke.lib; |
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25 |
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26 import jdk.experimental.bytecode.BasicClassBuilder; |
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27 import jdk.experimental.bytecode.BasicTypeHelper; |
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28 import jdk.experimental.bytecode.Flag; |
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29 import jdk.experimental.bytecode.PoolHelper; |
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30 import jdk.experimental.bytecode.TypedCodeBuilder; |
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31 |
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32 import java.io.FileOutputStream; |
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33 import java.lang.invoke.MethodHandle; |
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34 import java.lang.invoke.MethodHandles; |
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35 import java.lang.invoke.MethodType; |
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36 import java.util.concurrent.atomic.AtomicInteger; |
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37 import java.util.function.Consumer; |
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38 import java.util.function.Function; |
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39 |
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40 import static java.lang.invoke.MethodType.fromMethodDescriptorString; |
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41 import static java.lang.invoke.MethodType.methodType; |
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42 |
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43 public class InstructionHelper { |
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44 |
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45 static final BasicTypeHelper BTH = new BasicTypeHelper(); |
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46 |
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47 static final AtomicInteger COUNT = new AtomicInteger(); |
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48 |
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49 static BasicClassBuilder classBuilder(MethodHandles.Lookup l) { |
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50 String className = l.lookupClass().getCanonicalName().replace('.', '/') + "$Code_" + COUNT.getAndIncrement(); |
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51 return new BasicClassBuilder(className, 55, 0) |
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52 .withSuperclass("java/lang/Object") |
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53 .withMethod("<init>", "()V", M -> |
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54 M.withFlags(Flag.ACC_PUBLIC) |
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55 .withCode(TypedCodeBuilder::new, C -> |
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56 C.aload_0().invokespecial("java/lang/Object", "<init>", "()V", false).return_() |
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57 )); |
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58 } |
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59 |
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60 public static MethodHandle invokedynamic(MethodHandles.Lookup l, |
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61 String name, MethodType type, |
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62 String bsmMethodName, MethodType bsmType, |
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63 Consumer<PoolHelper.StaticArgListBuilder<String, String, byte[]>> staticArgs) throws Exception { |
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64 byte[] byteArray = classBuilder(l) |
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65 .withMethod("m", type.toMethodDescriptorString(), M -> |
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66 M.withFlags(Flag.ACC_PUBLIC, Flag.ACC_STATIC) |
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67 .withCode(TypedCodeBuilder::new, |
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68 C -> { |
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69 for (int i = 0; i < type.parameterCount(); i++) { |
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70 C.load(BTH.tag(cref(type.parameterType(i))), i); |
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71 } |
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72 C.invokedynamic(name, type.toMethodDescriptorString(), |
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73 csym(l.lookupClass()), bsmMethodName, bsmType.toMethodDescriptorString(), |
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74 staticArgs); |
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75 C.return_(BTH.tag(cref(type.returnType()))); |
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76 } |
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77 )) |
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78 .build(); |
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79 Class<?> gc = l.defineClass(byteArray); |
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80 return l.findStatic(gc, "m", type); |
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81 } |
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82 |
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83 public static MethodHandle ldcMethodHandle(MethodHandles.Lookup l, |
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84 int refKind, Class<?> owner, String name, MethodType type) throws Exception { |
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85 return ldc(l, MethodHandle.class, |
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86 P -> P.putHandle(refKind, csym(owner), name, type.toMethodDescriptorString())); |
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87 } |
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88 |
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89 public static MethodHandle ldcDynamicConstant(MethodHandles.Lookup l, |
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90 String name, Class<?> type, |
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91 String bsmMethodName, MethodType bsmType, |
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92 Consumer<PoolHelper.StaticArgListBuilder<String, String, byte[]>> staticArgs) throws Exception { |
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93 return ldcDynamicConstant(l, name, cref(type), bsmMethodName, bsmType.toMethodDescriptorString(), staticArgs); |
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94 } |
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95 |
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96 public static MethodHandle ldcDynamicConstant(MethodHandles.Lookup l, |
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97 String name, String type, |
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98 String bsmMethodName, String bsmType, |
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99 Consumer<PoolHelper.StaticArgListBuilder<String, String, byte[]>> staticArgs) throws Exception { |
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100 return ldc(l, type, |
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101 P -> P.putDynamicConstant(name, type, |
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102 csym(l.lookupClass()), bsmMethodName, bsmType, |
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103 staticArgs)); |
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104 } |
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105 |
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106 public static MethodHandle ldc(MethodHandles.Lookup l, |
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107 Class<?> type, |
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108 Function<PoolHelper<String, String, byte[]>, Integer> poolFunc) throws Exception { |
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109 return ldc(l, cref(type), poolFunc); |
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110 } |
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111 |
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112 public static MethodHandle ldc(MethodHandles.Lookup l, |
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113 String type, |
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114 Function<PoolHelper<String, String, byte[]>, Integer> poolFunc) throws Exception { |
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115 String methodType = "()" + type; |
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116 byte[] byteArray = classBuilder(l) |
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117 .withMethod("m", "()" + type, M -> |
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118 M.withFlags(Flag.ACC_PUBLIC, Flag.ACC_STATIC) |
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119 .withCode(TypedCodeBuilder::new, |
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120 C -> { |
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121 C.ldc(null, (P, v) -> poolFunc.apply(P)); |
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122 C.return_(BTH.tag(type)); |
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123 } |
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124 )) |
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125 .build(); |
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126 Class<?> gc = l.defineClass(byteArray); |
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127 return l.findStatic(gc, "m", fromMethodDescriptorString(methodType, l.lookupClass().getClassLoader())); |
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128 } |
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129 |
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130 public static String csym(Class<?> c) { |
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131 return c.getCanonicalName().replace('.', '/'); |
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132 } |
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133 |
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134 public static String cref(Class<?> c) { |
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135 return methodType(c).toMethodDescriptorString().substring(2); |
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136 } |
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137 } |