1 /*

     2  * Copyright (c) 2016, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

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    23 

    24 /*

    25  * @test

    26  * @bug 8147039

    27  * @summary Confirm locals[] always has expected length, even for "dead" locals

    28  * @modules java.base/java.lang:open

    29  * @compile LocalsAndOperands.java

    30  * @run testng/othervm -Xcomp CountLocalSlots

    31  */

    32 

    33 import org.testng.annotations.Test;

    34 import java.lang.StackWalker.StackFrame;

    35 

    36 public class CountLocalSlots {

    37     final static boolean debug = true;

    38 

    39     @Test(dataProvider = "provider", dataProviderClass = LocalsAndOperands.class)

    40     public void countLocalSlots(StackFrame... frames) {

    41         for (StackFrame frame : frames) {

    42             if (debug) {

    43                 System.out.println("Running countLocalSlots");

    44                 LocalsAndOperands.dumpStackWithLocals(frames);

    45             }

    46             // Confirm expected number of locals

    47             String methodName = frame.getMethodName();

    48             Integer expectedObj = (Integer) LocalsAndOperands.Tester.NUM_LOCALS.get(methodName);

    49             if (expectedObj == null) {

    50                 if (!debug) { LocalsAndOperands.dumpStackWithLocals(frames); }

    51                 throw new RuntimeException("No NUM_LOCALS entry for " +

    52                         methodName + "().  Update test?");

    53             }

    54             Object[] locals = (Object[]) LocalsAndOperands.invokeGetLocals(frame);

    55             if (locals.length != expectedObj) {

    56                 if (!debug) { LocalsAndOperands.dumpStackWithLocals(frames); }

    57                 throw new RuntimeException(methodName + "(): number of locals (" +

    58                         locals.length + ") did not match expected (" + expectedObj + ")");

    59             }

    60         }

    61     }

    62 }