1 /* 2 * Copyright (c) 2011, 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 /** 26 * @test 27 * @bug 6865265 28 * @summary JVM crashes with "missing exception handler" error 29 * @author volker.simonis@sap.com 30 * 31 * @run main/othervm -XX:CompileThreshold=100 -Xbatch -Xss392k StackOverflowBug 32 */ 33 34 35 public class StackOverflowBug { 36 37 public static int run() { 38 try { 39 try { 40 return run(); 41 } catch (Throwable e) { 42 // Notice that the class 'Throwable' is NOT resolved by the verifier, 43 // because the verifier only checks if 'Throwable' is assignable to 44 // 'java.lang.Throwable' and this check succeeds immediately if the two 45 // types have equal names (see 'VerificationType::is_assignable_from' which 46 // is called from 'ClassVerifier::verify_exception_handler_table'). 47 // This is strange, because if the two classes have different names, 48 // 'is_assignable_from()' calls 'is_reference_assignable_from()' which resolves 49 // both classes by calling 'SystemDictionary::resolve_or_fail()'. This call 50 // also takes into account the current class loader (i.e. the one which was used 51 // to load this class) and would place a corresponding 52 // "java.lang.Throwable / current-Classloader" entry into the system dictionary. 53 // This would in turn allow C2 to see 'java.lang.Throwable' as "loaded" 54 // (see 'Parse::catch_inline_exceptions()') when this method is compiled. 55 return 42; 56 } 57 } 58 finally { 59 } 60 } 61 62 public static void main(String argv[]) { 63 run(); 64 } 65 } 66 67 /* 68 public static int run(); 69 Code: 70 0: invokestatic #2 // Method run:()I 71 3: istore_0 72 4: iload_0 73 5: ireturn 74 6: astore_0 75 7: bipush 42 76 9: istore_1 77 10: iload_1 78 11: ireturn 79 12: astore_2 80 13: aload_2 81 14: athrow 82 Exception table: 83 from to target type 84 0 4 6 Class java/lang/Throwable 85 0 4 12 any 86 6 10 12 any 87 12 13 12 any 88 89 */