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

    29  * @run testng/othervm -Xcomp LocalsCrash

    30  */

    31 

    32 import org.testng.annotations.*;

    33 import java.lang.reflect.*;

    34 import java.util.List;

    35 import java.util.stream.Collectors;

    36 

    37 public class LocalsCrash {

    38     static Class<?> liveStackFrameClass;

    39     static Method getStackWalker;

    40 

    41     static {

    42         try {

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

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

    45             getStackWalker.setAccessible(true);

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

    47     }

    48 

    49     private StackWalker walker;

    50 

    51     LocalsCrash() {

    52         try {

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

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

    55     }

    56 

    57     @Test

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

    59 

    60     @Test

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

    62 

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

    64         try {

    65             // Unused local variables will become dead

    66             int x = 10;

    67             char c = 'z';

    68             String hi = "himom";

    69             long l = 1000000L;

    70             double d =  3.1415926;

    71 

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

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

    74     }

    75 }