| /* |
| * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 4446677 |
| * @bug 8158237 |
| * @summary debuggee used to crash when debugging under jbuilder |
| * @author jjh |
| * |
| * @run build TestScaffold VMConnection TargetListener TargetAdapter |
| * @run compile -g BacktraceFieldTest.java |
| * @run driver BacktraceFieldTest |
| */ |
| |
| /* |
| * The fix for this bug filters out the backtrace field from the list |
| * of fields for java.lang.Throwable. |
| * This test verifies that this really happens, and also verifies that the fix |
| * doesn't incorrectly discard other fields. |
| */ |
| |
| import com.sun.jdi.*; |
| import com.sun.jdi.event.*; |
| import com.sun.jdi.request.*; |
| |
| import java.util.*; |
| |
| /********** target program **********/ |
| |
| class Testy { |
| /* |
| * This is used to verify that the fix doesn't filter out fields that it |
| * shouldn't. 7 is an abitrary number, and this isn't a definitive |
| * test; the fix could conceivably filter out the 89th field of a class |
| * named Foo. |
| * To verify that this part of this test works, first uncomment the field8 |
| * line and verify that the test fails, and then rename a field to xxx and |
| * verify that the test fails. |
| */ |
| int field1; |
| int field2; |
| int field3; |
| int field4; |
| int field5; |
| int field6; |
| final static int field7 = 7; // Value is the number of fields. |
| //int field8; |
| |
| Testy() { |
| } |
| } |
| |
| |
| class BacktraceFieldTarg { |
| public static void gus() { |
| } |
| |
| public static void main(String[] args) { |
| Testy myTesty = new Testy(); |
| try { |
| throw new RuntimeException("jjException"); |
| } catch (Exception ee) { |
| gus(); |
| System.out.println("debuggee: Exception: " + ee); |
| } |
| } |
| } |
| |
| /********** test program **********/ |
| |
| public class BacktraceFieldTest extends TestScaffold { |
| ThreadReference mainThread; |
| |
| BacktraceFieldTest (String args[]) { |
| super(args); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| new BacktraceFieldTest(args).startTests(); |
| } |
| |
| private void printval(ArrayReference backTraceVal, int index) throws Exception { |
| ArrayReference val = (ArrayReference)backTraceVal.getValue(index); |
| println("BT: val at " + index + " = " + val); |
| |
| // The segv used to happen here for index = 0 |
| // Now all objects in the backtrace are objects. |
| Object xVal = (Object)val.getValue(0); |
| println("BT: xVal = " + xVal); |
| } |
| |
| /********** test core **********/ |
| |
| protected void runTests() throws Exception { |
| /* |
| * Get to the top of gus() |
| * to determine mainThread |
| */ |
| BreakpointEvent bpe = startTo("BacktraceFieldTarg", "gus", "()V"); |
| mainThread = bpe.thread(); |
| |
| /* |
| * We are now one frame below the exception frame that contains |
| * our ee var. |
| */ |
| StackFrame myFrame = mainThread.frame(1); |
| |
| LocalVariable lv = myFrame.visibleVariableByName("ee"); |
| println("BT: lv = " + lv); |
| println("BT: lvType = " + lv.typeName()); |
| |
| List allFields = ((ReferenceType)(lv.type())).allFields(); |
| println("BT: allFields = " + allFields); |
| |
| /* |
| * Search through the fields of ee to verify that |
| * java.lang.Throwable.backtrace isn't there. |
| */ |
| boolean backtrace_found = false; |
| Iterator iter = allFields.iterator(); |
| while(iter.hasNext()) { |
| Field ff = (Field)iter.next(); |
| if (ff.toString().equals("java.lang.Throwable.backtrace")) { |
| backtrace_found = true; |
| println("java.lang.Throwable.backtrace field not filtered out."); |
| |
| /* |
| * If you want to experience the segv this bug causes, change |
| * this test to 1 == 1 and run it with jdk 1.4, build 74 or earlier |
| */ |
| if (1 == 1) { |
| // The following code will show the segv that this can cause. |
| ObjectReference myVal = (ObjectReference)myFrame.getValue(lv); |
| println("BT: myVal = " + myVal); |
| |
| ArrayReference backTraceVal = (ArrayReference)myVal.getValue(ff); |
| println("BT: backTraceVal = " + backTraceVal); |
| |
| printval(backTraceVal, 0); |
| printval(backTraceVal, 1); |
| printval(backTraceVal, 2); |
| printval(backTraceVal, 3); // backtrace has 4 elements |
| |
| try { |
| printval(backTraceVal, 4); |
| } catch (Exception e) { |
| println("Exception " + e); |
| } |
| } |
| break; |
| } |
| } |
| |
| if (!backtrace_found) { |
| failure("ERROR: java.lang.Throwable.backtrace field filtered out."); |
| } |
| |
| // Next, verify that we don't accidently discard a field that we shouldn't |
| |
| if (!testFailed) { |
| lv = myFrame.visibleVariableByName("myTesty"); |
| |
| allFields = ((ReferenceType)(lv.type())).allFields(); |
| println("BT: allFields = " + allFields); |
| |
| if (allFields.size() != Testy.field7) { |
| failure("ERROR: wrong number of fields; expected " + Testy.field7 + ", Got " + allFields.size()); |
| } else { |
| iter = allFields.iterator(); |
| while(iter.hasNext()) { |
| String fieldName = ((Field)iter.next()).toString(); |
| if (!fieldName.startsWith("Testy.field", 0)) { |
| failure("ERROR: Found bogus field: " + fieldName.toString()); |
| } |
| } |
| } |
| } |
| |
| listenUntilVMDisconnect(); |
| |
| /* |
| * deal with results of test |
| * if anything has called failure("foo") testFailed will be true |
| */ |
| if (!testFailed) { |
| println("BacktraceFieldTest: passed"); |
| } else { |
| throw new Exception("BacktraceFieldTest: failed"); |
| } |
| } |
| } |