J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001-2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /** |
| 25 | * @test |
| 26 | * @bug 4446677 |
| 27 | * @summary debuggee crashes when debugging under jbuilder |
| 28 | * |
| 29 | * @author jjh |
| 30 | * |
| 31 | * @run build TestScaffold VMConnection TargetListener TargetAdapter |
| 32 | * @run compile -g BacktraceFieldTest.java |
| 33 | * @run main BacktraceFieldTest |
| 34 | */ |
| 35 | |
| 36 | /* |
| 37 | * The fix for this bug filters out the backtrace field from the list |
| 38 | * of fields for java.lang.Throwable. |
| 39 | * This test verifies that this really happens, and also verifies that the fix |
| 40 | * doesn't incorrectly discard other fields. |
| 41 | */ |
| 42 | |
| 43 | import com.sun.jdi.*; |
| 44 | import com.sun.jdi.event.*; |
| 45 | import com.sun.jdi.request.*; |
| 46 | |
| 47 | import java.util.*; |
| 48 | |
| 49 | /********** target program **********/ |
| 50 | |
| 51 | class Testy { |
| 52 | /* |
| 53 | * This is used to verify that the fix doesn't filter out fields that it |
| 54 | * shouldn't. 7 is an abitrary number, and this isn't a definitive |
| 55 | * test; the fix could conceivably filter out the 89th field of a class |
| 56 | * named Foo. |
| 57 | * To verify that this part of this test works, first uncomment the field8 |
| 58 | * line and verify that the test fails, and then rename a field to xxx and |
| 59 | * verify that the test fails. |
| 60 | */ |
| 61 | int field1; |
| 62 | int field2; |
| 63 | int field3; |
| 64 | int field4; |
| 65 | int field5; |
| 66 | int field6; |
| 67 | final static int field7 = 7; // Value is the number of fields. |
| 68 | //int field8; |
| 69 | |
| 70 | Testy() { |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | |
| 75 | class BacktraceFieldTarg { |
| 76 | public static void gus() { |
| 77 | } |
| 78 | |
| 79 | public static void main(String[] args) { |
| 80 | Testy myTesty = new Testy(); |
| 81 | try { |
| 82 | throw new RuntimeException("jjException"); |
| 83 | } catch (Exception ee) { |
| 84 | gus(); |
| 85 | System.out.println("debuggee: Exception: " + ee); |
| 86 | } |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | /********** test program **********/ |
| 91 | |
| 92 | public class BacktraceFieldTest extends TestScaffold { |
| 93 | ThreadReference mainThread; |
| 94 | |
| 95 | BacktraceFieldTest (String args[]) { |
| 96 | super(args); |
| 97 | } |
| 98 | |
| 99 | public static void main(String[] args) throws Exception { |
| 100 | new BacktraceFieldTest(args).startTests(); |
| 101 | } |
| 102 | |
| 103 | /********** test core **********/ |
| 104 | |
| 105 | protected void runTests() throws Exception { |
| 106 | /* |
| 107 | * Get to the top of gus() |
| 108 | * to determine mainThread |
| 109 | */ |
| 110 | BreakpointEvent bpe = startTo("BacktraceFieldTarg", "gus", "()V"); |
| 111 | mainThread = bpe.thread(); |
| 112 | |
| 113 | /* |
| 114 | * We are now one frame below the exception frame that contains |
| 115 | * our ee var. |
| 116 | */ |
| 117 | StackFrame myFrame = mainThread.frame(1); |
| 118 | |
| 119 | LocalVariable lv = myFrame.visibleVariableByName("ee"); |
| 120 | println("BT: lv = " + lv); |
| 121 | println("BT: lvType = " + lv.typeName()); |
| 122 | |
| 123 | List allFields = ((ReferenceType)(lv.type())).allFields(); |
| 124 | println("BT: allFields = " + allFields); |
| 125 | |
| 126 | /* |
| 127 | * Search through the fields of ee to verify that |
| 128 | * java.lang.Throwable.backtrace isn't there. |
| 129 | */ |
| 130 | Iterator iter = allFields.iterator(); |
| 131 | while(iter.hasNext()) { |
| 132 | Field ff = (Field)iter.next(); |
| 133 | if (ff.toString().equals("java.lang.Throwable.backtrace")) { |
| 134 | failure("ERROR: java.lang.Throwable.backtrace field not filtered out."); |
| 135 | |
| 136 | /* |
| 137 | * If you want to experience the segv this bug causes, change |
| 138 | * this test to 1 == 1 and run it with jdk 1.4, build 74 or earlier |
| 139 | */ |
| 140 | if (1 == 0) { |
| 141 | // The following code will show the segv that this can cause. |
| 142 | ObjectReference myVal = (ObjectReference)myFrame.getValue(lv); |
| 143 | println("BT: myVal = " + myVal); |
| 144 | |
| 145 | ArrayReference backTraceVal = null; |
| 146 | backTraceVal = (ArrayReference)myVal.getValue(ff); |
| 147 | println("BT: backTraceVal = " + backTraceVal); |
| 148 | |
| 149 | ArrayReference secondVal = (ArrayReference)backTraceVal.getValue(1); |
| 150 | println("BT: secondVal = " + secondVal); |
| 151 | |
| 152 | Object x2Val = (Object)secondVal.getValue(0); |
| 153 | println("BT: x2Val = " + x2Val); |
| 154 | |
| 155 | ArrayReference firstVal = (ArrayReference)backTraceVal.getValue(0); |
| 156 | println("BT: firstVal = " + firstVal); |
| 157 | |
| 158 | // The segv happens here. |
| 159 | Object xVal = (Object)firstVal.getValue(0); |
| 160 | println("BT: xVal = " + xVal); |
| 161 | } |
| 162 | break; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | // Next, verify that we don't accidently discard a field that we shouldn't |
| 167 | |
| 168 | if (!testFailed) { |
| 169 | lv = myFrame.visibleVariableByName("myTesty"); |
| 170 | |
| 171 | allFields = ((ReferenceType)(lv.type())).allFields(); |
| 172 | println("BT: allFields = " + allFields); |
| 173 | |
| 174 | if (allFields.size() != Testy.field7) { |
| 175 | failure("ERROR: wrong number of fields; expected " + Testy.field7 + ", Got " + allFields.size()); |
| 176 | } else { |
| 177 | iter = allFields.iterator(); |
| 178 | while(iter.hasNext()) { |
| 179 | String fieldName = ((Field)iter.next()).toString(); |
| 180 | if (!fieldName.startsWith("Testy.field", 0)) { |
| 181 | failure("ERROR: Found bogus field: " + fieldName.toString()); |
| 182 | } |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | listenUntilVMDisconnect(); |
| 188 | |
| 189 | /* |
| 190 | * deal with results of test |
| 191 | * if anything has called failure("foo") testFailed will be true |
| 192 | */ |
| 193 | if (!testFailed) { |
| 194 | println("BacktraceFieldTest: passed"); |
| 195 | } else { |
| 196 | throw new Exception("BacktraceFieldTest: failed"); |
| 197 | } |
| 198 | } |
| 199 | } |