/*

 * Copyright 2001-2002 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/**

 *  @test

 *  @bug 4446677

 *  @summary debuggee crashes when debugging under jbuilder

 *

 *  @author jjh

 *

 *  @run build TestScaffold VMConnection TargetListener TargetAdapter

 *  @run compile -g BacktraceFieldTest.java

 *  @run main 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();

    }

    /********** 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.

         */

        Iterator iter = allFields.iterator();

        while(iter.hasNext()) {

            Field ff = (Field)iter.next();

            if (ff.toString().equals("java.lang.Throwable.backtrace")) {

                failure("ERROR: 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 == 0) {

                    // The following code will show the segv that this can cause.

                    ObjectReference myVal = (ObjectReference)myFrame.getValue(lv);

                    println("BT: myVal = " + myVal);

                    ArrayReference backTraceVal = null;

                    backTraceVal = (ArrayReference)myVal.getValue(ff);

                    println("BT: backTraceVal = " + backTraceVal);

                    ArrayReference secondVal = (ArrayReference)backTraceVal.getValue(1);

                    println("BT: secondVal = " + secondVal);

                    Object x2Val = (Object)secondVal.getValue(0);

                    println("BT: x2Val = " + x2Val);

                    ArrayReference firstVal = (ArrayReference)backTraceVal.getValue(0);

                    println("BT: firstVal = " + firstVal);

                    // The segv happens here.

                    Object xVal = (Object)firstVal.getValue(0);

                    println("BT: xVal = " + xVal);

                }

                break;

            }

        }

        // 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");

        }

    }

}