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1 /* |
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2 * Copyright (c) 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 /* |
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25 * @test |
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26 * @bug 8046171 |
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27 * @summary Test access to private fields between nestmates and nest-host |
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28 * using different flavours of named nested types using MethodHandles |
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29 * @run main TestMethodHandles |
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30 */ |
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31 |
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32 import java.lang.invoke.*; |
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33 import static java.lang.invoke.MethodHandles.*; |
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34 |
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35 public class TestMethodHandles { |
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36 |
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37 // Private field of nest-host for nestmates to access |
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38 private int priv_field; |
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39 |
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40 // public constructor so we aren't relying on private access |
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41 public TestMethodHandles() {} |
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42 |
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43 // Methods that will access private fields of nestmates |
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44 |
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45 // NOTE: No StaticIface variants as interfaces can't have instance fields |
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46 |
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47 void access_priv(TestMethodHandles o) throws Throwable { |
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48 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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49 this.priv_field = (int) mh.invoke(o); |
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50 this.priv_field = (int) mh.invokeExact(o); |
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51 checkBadInvokeG(mh, new StaticNested()); // wrong nestmate |
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52 checkBadInvokeG(mh, mh); // completely wrong type |
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53 |
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54 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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55 mh.invoke(o, 2); |
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56 mh.invokeExact(o, 3); |
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57 checkBadInvokeS(mh, new StaticNested()); // wrong nestmate |
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58 checkBadInvokeS(mh, mh); // completely wrong type |
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59 } |
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60 void access_priv(InnerNested o) throws Throwable { |
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61 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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62 this.priv_field = (int) mh.invoke(o); |
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63 this.priv_field = (int) mh.invokeExact(o); |
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64 checkBadInvokeG(mh, this); // wrong nestmate |
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65 checkBadInvokeG(mh, mh); // completely wrong type |
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66 |
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67 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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68 mh.invoke(o, 2); |
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69 mh.invokeExact(o, 3); |
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70 checkBadInvokeS(mh, this); // wrong nestmate |
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71 checkBadInvokeS(mh, mh); // completely wrong type |
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72 } |
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73 void access_priv(StaticNested o) throws Throwable { |
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74 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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75 this.priv_field = (int) mh.invoke(o); |
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76 this.priv_field = (int) mh.invokeExact(o); |
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77 checkBadInvokeG(mh, this); // wrong nestmate |
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78 checkBadInvokeG(mh, mh); // completely wrong type |
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79 |
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80 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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81 mh.invoke(o, 2); |
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82 mh.invokeExact(o, 3); |
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83 checkBadInvokeS(mh, this); // wrong nestmate |
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84 checkBadInvokeS(mh, mh); // completely wrong type |
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85 } |
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86 |
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87 // The various nestmates |
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88 |
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89 static interface StaticIface { |
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90 |
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91 // Methods that will access private fields of nestmates |
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92 |
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93 default void access_priv(TestMethodHandles o) throws Throwable { |
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94 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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95 int priv_field = (int) mh.invoke(o); |
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96 priv_field = (int) mh.invokeExact(o); |
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97 checkBadInvokeG(mh, this); // wrong nestmate |
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98 checkBadInvokeG(mh, mh); // completely wrong type |
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99 |
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100 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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101 mh.invoke(o, 2); |
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102 mh.invokeExact(o, 3); |
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103 checkBadInvokeS(mh, this); // wrong nestmate |
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104 checkBadInvokeS(mh, mh); // completely wrong type |
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105 } |
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106 default void access_priv(InnerNested o) throws Throwable { |
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107 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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108 int priv_field = (int) mh.invoke(o); |
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109 priv_field = (int) mh.invokeExact(o); |
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110 checkBadInvokeG(mh, this); // wrong nestmate |
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111 checkBadInvokeG(mh, mh); // completely wrong type |
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112 |
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113 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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114 mh.invoke(o, 2); |
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115 mh.invokeExact(o, 3); |
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116 checkBadInvokeS(mh, this); // wrong nestmate |
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117 checkBadInvokeS(mh, mh); // completely wrong type |
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118 } |
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119 default void access_priv(StaticNested o) throws Throwable { |
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120 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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121 int priv_field = (int) mh.invoke(o); |
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122 priv_field = (int) mh.invokeExact(o); |
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123 checkBadInvokeG(mh, this); // wrong nestmate |
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124 checkBadInvokeG(mh, mh); // completely wrong type |
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125 |
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126 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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127 mh.invoke(o, 2); |
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128 mh.invokeExact(o, 3); |
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129 checkBadInvokeS(mh, this); // wrong nestmate |
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130 checkBadInvokeS(mh, mh); // completely wrong type |
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131 } |
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132 } |
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133 |
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134 static class StaticNested { |
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135 |
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136 private int priv_field; |
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137 |
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138 // public constructor so we aren't relying on private access |
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139 public StaticNested() {} |
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140 |
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141 // Methods that will access private fields of nestmates |
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142 |
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143 void access_priv(TestMethodHandles o) throws Throwable { |
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144 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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145 this.priv_field = (int) mh.invoke(o); |
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146 this.priv_field = (int) mh.invokeExact(o); |
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147 checkBadInvokeG(mh, this); // wrong nestmate |
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148 checkBadInvokeG(mh, mh); // completely wrong type |
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149 |
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150 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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151 mh.invoke(o, 2); |
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152 mh.invokeExact(o, 3); |
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153 checkBadInvokeS(mh, this); // wrong nestmate |
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154 checkBadInvokeS(mh, mh); // completely wrong type |
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155 } |
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156 void access_priv(InnerNested o) throws Throwable { |
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157 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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158 this.priv_field = (int) mh.invoke(o); |
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159 this.priv_field = (int) mh.invokeExact(o); |
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160 checkBadInvokeG(mh, this); // wrong nestmate |
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161 checkBadInvokeG(mh, mh); // completely wrong type |
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162 |
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163 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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164 mh.invoke(o, 2); |
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165 mh.invokeExact(o, 3); |
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166 checkBadInvokeS(mh, this); // wrong nestmate |
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167 checkBadInvokeS(mh, mh); // completely wrong type |
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168 } |
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169 void access_priv(StaticNested o) throws Throwable { |
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170 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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171 this.priv_field = (int) mh.invoke(o); |
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172 this.priv_field = (int) mh.invokeExact(o); |
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173 checkBadInvokeG(mh, new TestMethodHandles()); // wrong nestmate |
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174 checkBadInvokeG(mh, mh); // completely wrong type |
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175 |
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176 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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177 mh.invoke(o, 2); |
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178 mh.invokeExact(o, 3); |
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179 checkBadInvokeS(mh, new TestMethodHandles()); // wrong nestmate |
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180 checkBadInvokeS(mh, mh); // completely wrong type |
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181 } |
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182 } |
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183 |
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184 class InnerNested { |
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185 |
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186 private int priv_field; |
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187 |
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188 // public constructor so we aren't relying on private access |
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189 public InnerNested() {} |
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190 |
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191 void access_priv(TestMethodHandles o) throws Throwable { |
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192 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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193 this.priv_field = (int) mh.invoke(o); |
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194 this.priv_field = (int) mh.invokeExact(o); |
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195 checkBadInvokeG(mh, this); // wrong nestmate |
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196 checkBadInvokeG(mh, mh); // completely wrong type |
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197 |
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198 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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199 mh.invoke(o, 2); |
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200 mh.invokeExact(o, 3); |
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201 checkBadInvokeS(mh, this); // wrong nestmate |
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202 checkBadInvokeS(mh, mh); // completely wrong type |
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203 } |
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204 void access_priv(InnerNested o) throws Throwable { |
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205 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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206 this.priv_field = (int) mh.invoke(o); |
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207 this.priv_field = (int) mh.invokeExact(o); |
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208 checkBadInvokeG(mh, new StaticNested()); // wrong nestmate |
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209 checkBadInvokeG(mh, mh); // completely wrong type |
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210 |
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211 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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212 mh.invoke(o, 2); |
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213 mh.invokeExact(o, 3); |
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214 checkBadInvokeS(mh, new StaticNested()); // wrong nestmate |
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215 checkBadInvokeS(mh, mh); // completely wrong type |
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216 } |
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217 void access_priv(StaticNested o) throws Throwable { |
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218 MethodHandle mh = lookup().findGetter(o.getClass(), "priv_field", int.class); |
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219 this.priv_field = (int) mh.invoke(o); |
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220 this.priv_field = (int) mh.invokeExact(o); |
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221 checkBadInvokeG(mh, this); // wrong nestmate |
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222 checkBadInvokeG(mh, mh); // completely wrong type |
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223 |
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224 mh = lookup().findSetter(o.getClass(), "priv_field", int.class); |
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225 mh.invoke(o, 2); |
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226 mh.invokeExact(o, 3); |
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227 checkBadInvokeS(mh, this); // wrong nestmate |
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228 checkBadInvokeS(mh, mh); // completely wrong type |
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229 } |
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230 } |
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231 |
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232 static void checkBadInvokeG(MethodHandle mh, Object o) throws Throwable { |
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233 try { |
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234 int x = (int) mh.invoke(o); |
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235 throw new Error("Invoke on MethodHandle " + mh + " with receiver " |
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236 + o + "should have failed with ClassCastException!"); |
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237 } |
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238 catch (ClassCastException expected) { |
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239 System.out.println("invoke got expected exception: " + expected); |
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240 } |
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241 } |
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242 |
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243 static void checkBadInvokeS(MethodHandle mh, Object o) throws Throwable { |
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244 try { |
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245 mh.invoke(o, 42); |
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246 throw new Error("Invoke on MethodHandle " + mh + " with receiver " |
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247 + o + "should have failed with ClassCastException!"); |
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248 } |
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249 catch (ClassCastException expected) { |
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250 System.out.println("invoke got expected exception: " + expected); |
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251 } |
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252 } |
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253 |
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254 public static void main(String[] args) throws Throwable { |
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255 TestMethodHandles o = new TestMethodHandles(); |
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256 StaticNested s = new StaticNested(); |
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257 InnerNested i = o.new InnerNested(); |
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258 StaticIface intf = new StaticIface() {}; |
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259 |
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260 o.access_priv(new TestMethodHandles()); |
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261 o.access_priv(i); |
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262 o.access_priv(s); |
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263 |
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264 s.access_priv(o); |
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265 s.access_priv(i); |
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266 s.access_priv(new StaticNested()); |
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267 |
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268 i.access_priv(o); |
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269 i.access_priv(o.new InnerNested()); |
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270 i.access_priv(s); |
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271 |
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272 intf.access_priv(o); |
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273 intf.access_priv(i); |
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274 intf.access_priv(s); |
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275 } |
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276 } |