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  * @test

    26  * @bug 6865265

    27  * @summary JVM crashes with "missing exception handler" error

    28  * @author volker.simonis@sap.com

    29  *

    30  * @run main/othervm -XX:CompileThreshold=100 -Xbatch -Xss512k

    31  *      compiler.runtime.StackOverflowBug

    32  */

    33 

    34 package compiler.runtime;

    35 

    36 public class StackOverflowBug {

    37 

    38     public static int run() {

    39         try {

    40             try {

    41                 return run();

    42             } catch (Throwable e) {

    43                 // Notice that the class 'Throwable' is NOT resolved by the verifier,

    44                 // because the verifier only checks if 'Throwable' is assignable to

    45                 // 'java.lang.Throwable' and this check succeeds immediately if the two

    46                 // types have equal names (see 'VerificationType::is_assignable_from' which

    47                 // is called from 'ClassVerifier::verify_exception_handler_table').

    48                 // This is strange, because if the two classes have different names,

    49                 // 'is_assignable_from()' calls 'is_reference_assignable_from()' which resolves

    50                 // both classes by calling 'SystemDictionary::resolve_or_fail()'. This call

    51                 // also takes into account the current class loader (i.e. the one which was used

    52                 // to load this class) and would place a corresponding

    53                 // "java.lang.Throwable / current-Classloader" entry into the system dictionary.

    54                 // This would in turn allow C2 to see 'java.lang.Throwable' as "loaded"

    55                 // (see 'Parse::catch_inline_exceptions()') when this method is compiled.

    56                 return 42;

    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  */