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 }