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1 /* |
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2 * Copyright (c) 2001, 2016, 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 4446677 |
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27 * @bug 8158237 |
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28 * @summary debuggee used to crash when debugging under jbuilder |
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29 * @author jjh |
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30 * |
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31 * @run build TestScaffold VMConnection TargetListener TargetAdapter |
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32 * @run compile -g BacktraceFieldTest.java |
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33 * @run driver BacktraceFieldTest |
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34 */ |
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35 |
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36 /* |
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37 * The fix for this bug filters out the backtrace field from the list |
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38 * of fields for java.lang.Throwable. |
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39 * This test verifies that this really happens, and also verifies that the fix |
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40 * doesn't incorrectly discard other fields. |
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41 */ |
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42 |
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43 import com.sun.jdi.*; |
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44 import com.sun.jdi.event.*; |
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45 import com.sun.jdi.request.*; |
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46 |
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47 import java.util.*; |
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48 |
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49 /********** target program **********/ |
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50 |
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51 class Testy { |
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52 /* |
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53 * This is used to verify that the fix doesn't filter out fields that it |
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54 * shouldn't. 7 is an abitrary number, and this isn't a definitive |
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55 * test; the fix could conceivably filter out the 89th field of a class |
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56 * named Foo. |
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57 * To verify that this part of this test works, first uncomment the field8 |
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58 * line and verify that the test fails, and then rename a field to xxx and |
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59 * verify that the test fails. |
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60 */ |
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61 int field1; |
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62 int field2; |
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63 int field3; |
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64 int field4; |
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65 int field5; |
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66 int field6; |
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67 final static int field7 = 7; // Value is the number of fields. |
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68 //int field8; |
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69 |
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70 Testy() { |
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71 } |
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72 } |
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73 |
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74 |
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75 class BacktraceFieldTarg { |
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76 public static void gus() { |
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77 } |
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78 |
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79 public static void main(String[] args) { |
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80 Testy myTesty = new Testy(); |
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81 try { |
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82 throw new RuntimeException("jjException"); |
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83 } catch (Exception ee) { |
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84 gus(); |
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85 System.out.println("debuggee: Exception: " + ee); |
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86 } |
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87 } |
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88 } |
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89 |
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90 /********** test program **********/ |
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91 |
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92 public class BacktraceFieldTest extends TestScaffold { |
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93 ThreadReference mainThread; |
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94 |
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95 BacktraceFieldTest (String args[]) { |
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96 super(args); |
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97 } |
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98 |
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99 public static void main(String[] args) throws Exception { |
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100 new BacktraceFieldTest(args).startTests(); |
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101 } |
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102 |
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103 private void printval(ArrayReference backTraceVal, int index) throws Exception { |
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104 ArrayReference val = (ArrayReference)backTraceVal.getValue(index); |
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105 println("BT: val at " + index + " = " + val); |
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106 |
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107 // The segv used to happen here for index = 0 |
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108 // Now all objects in the backtrace are objects. |
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109 Object xVal = (Object)val.getValue(0); |
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110 println("BT: xVal = " + xVal); |
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111 } |
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112 |
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113 /********** test core **********/ |
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114 |
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115 protected void runTests() throws Exception { |
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116 /* |
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117 * Get to the top of gus() |
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118 * to determine mainThread |
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119 */ |
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120 BreakpointEvent bpe = startTo("BacktraceFieldTarg", "gus", "()V"); |
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121 mainThread = bpe.thread(); |
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122 |
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123 /* |
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124 * We are now one frame below the exception frame that contains |
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125 * our ee var. |
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126 */ |
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127 StackFrame myFrame = mainThread.frame(1); |
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128 |
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129 LocalVariable lv = myFrame.visibleVariableByName("ee"); |
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130 println("BT: lv = " + lv); |
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131 println("BT: lvType = " + lv.typeName()); |
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132 |
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133 List allFields = ((ReferenceType)(lv.type())).allFields(); |
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134 println("BT: allFields = " + allFields); |
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135 |
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136 /* |
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137 * Search through the fields of ee to verify that |
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138 * java.lang.Throwable.backtrace isn't there. |
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139 */ |
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140 boolean backtrace_found = false; |
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141 Iterator iter = allFields.iterator(); |
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142 while(iter.hasNext()) { |
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143 Field ff = (Field)iter.next(); |
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144 if (ff.toString().equals("java.lang.Throwable.backtrace")) { |
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145 backtrace_found = true; |
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146 println("java.lang.Throwable.backtrace field not filtered out."); |
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147 |
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148 /* |
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149 * If you want to experience the segv this bug causes, change |
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150 * this test to 1 == 1 and run it with jdk 1.4, build 74 or earlier |
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151 */ |
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152 if (1 == 1) { |
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153 // The following code will show the segv that this can cause. |
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154 ObjectReference myVal = (ObjectReference)myFrame.getValue(lv); |
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155 println("BT: myVal = " + myVal); |
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156 |
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157 ArrayReference backTraceVal = (ArrayReference)myVal.getValue(ff); |
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158 println("BT: backTraceVal = " + backTraceVal); |
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159 |
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160 printval(backTraceVal, 0); |
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161 printval(backTraceVal, 1); |
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162 printval(backTraceVal, 2); |
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163 printval(backTraceVal, 3); // backtrace has 4 elements |
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164 |
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165 try { |
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166 printval(backTraceVal, 4); |
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167 } catch (Exception e) { |
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168 println("Exception " + e); |
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169 } |
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170 } |
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171 break; |
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172 } |
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173 } |
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174 |
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175 if (!backtrace_found) { |
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176 failure("ERROR: java.lang.Throwable.backtrace field filtered out."); |
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177 } |
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178 |
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179 // Next, verify that we don't accidently discard a field that we shouldn't |
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180 |
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181 if (!testFailed) { |
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182 lv = myFrame.visibleVariableByName("myTesty"); |
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183 |
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184 allFields = ((ReferenceType)(lv.type())).allFields(); |
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185 println("BT: allFields = " + allFields); |
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186 |
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187 if (allFields.size() != Testy.field7) { |
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188 failure("ERROR: wrong number of fields; expected " + Testy.field7 + ", Got " + allFields.size()); |
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189 } else { |
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190 iter = allFields.iterator(); |
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191 while(iter.hasNext()) { |
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192 String fieldName = ((Field)iter.next()).toString(); |
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193 if (!fieldName.startsWith("Testy.field", 0)) { |
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194 failure("ERROR: Found bogus field: " + fieldName.toString()); |
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195 } |
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196 } |
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197 } |
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198 } |
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199 |
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200 listenUntilVMDisconnect(); |
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201 |
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202 /* |
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203 * deal with results of test |
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204 * if anything has called failure("foo") testFailed will be true |
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205 */ |
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206 if (!testFailed) { |
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207 println("BacktraceFieldTest: passed"); |
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208 } else { |
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209 throw new Exception("BacktraceFieldTest: failed"); |
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210 } |
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211 } |
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212 } |