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

    21  * questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug 8147039

    27  * @summary Test for -Xcomp crash that happened before 8147039 fix

    28  * @run testng/othervm -Xcomp LocalsCrash

    29  */

    30 

    31 import org.testng.annotations.*;

    32 import java.lang.reflect.*;

    33 import java.util.List;

    34 import java.util.stream.Collectors;

    35 

    36 public class LocalsCrash {

    37     static Class<?> liveStackFrameClass;

    38     static Method getStackWalker;

    39 

    40     static {

    41         try {

    42             liveStackFrameClass = Class.forName("java.lang.LiveStackFrame");

    43             getStackWalker = liveStackFrameClass.getMethod("getStackWalker");

    44             getStackWalker.setAccessible(true);

    45         } catch (Throwable t) { throw new RuntimeException(t); }

    46     }

    47 

    48     private StackWalker walker;

    49 

    50     LocalsCrash() {

    51         try {

    52             walker = (StackWalker) getStackWalker.invoke(null);

    53         } catch (Exception e) { throw new RuntimeException(e); }

    54     }

    55 

    56     @Test

    57     public void test00() { doStackWalk(); }

    58 

    59     @Test

    60     public void test01() { doStackWalk(); }

    61 

    62     private synchronized List<StackWalker.StackFrame> doStackWalk() {

    63         try {

    64             // Unused local variables will become dead

    65             int x = 10;

    66             char c = 'z';

    67             String hi = "himom";

    68             long l = 1000000L;

    69             double d =  3.1415926;

    70 

    71             return walker.walk(s -> s.collect(Collectors.toList()));

    72         } catch (Exception e) { throw new RuntimeException(e); }

    73     }

    74 }