1 /*
   2  * Copyright (c) 2009, 2012, 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 package org.graalvm.compiler.jtt.except;
  24 
  25 import org.junit.Test;
  26 
  27 import org.graalvm.compiler.jtt.JTTTest;
  28 
  29 /**
  30  * Some basic checking of the stack trace produced after a StackOverflowError.
  31  */
  32 public class Catch_StackOverflowError_03 extends JTTTest {
  33 
  34     private static final int PASS = 0;
  35     private static final int FAIL = 1;
  36 
  37     private static void recurseA() {
  38         recurseB();
  39     }
  40 
  41     private static void recurseB() {
  42         recurseA();
  43     }
  44 
  45     public static int test() {
  46         try {
  47             recurseA();
  48         } catch (StackOverflowError stackOverflowError) {
  49             // Check that a method does not appear to be calling itself in the stack trace
  50             // and check that recurse* is only called by either recurse* or test
  51             StackTraceElement[] elements = null;
  52             elements = stackOverflowError.getStackTrace();
  53             if (elements.length == 0) {
  54                 // Not much we can do about this perfectly legal situation
  55                 return PASS;
  56             }
  57             String lastMethodName = elements[0].getMethodName();
  58             for (int i = 1; i < elements.length; ++i) {
  59                 String methodName = elements[i].getMethodName();
  60 
  61                 // Skip top-of-stack until we find a method with name "recurse*".
  62                 if (!methodName.startsWith("recurse")) {
  63                     continue;
  64                 }
  65 
  66                 // We reached the test method => done.
  67                 if (methodName.equals("test")) {
  68                     break;
  69                 }
  70 
  71                 // Stack elements must alternate between recurseA and recurseB
  72                 if (lastMethodName.equals(methodName) || (!methodName.equals("recurseA") && !methodName.equals("recurseB"))) {
  73                     return FAIL;
  74                 }
  75 
  76                 lastMethodName = methodName;
  77             }
  78 
  79             return PASS;
  80         }
  81 
  82         return FAIL;
  83     }
  84 
  85     @Test
  86     public void run0() throws Throwable {
  87         runTest("test");
  88     }
  89 
  90 }