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 }