/*

 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

/**

 * @test

 * @bug 7116216

 * @summary The vm crashes when GC happens during throwing a StackOverflow exception

 *

 * @run main/othervm -Xcomp -Xbatch StackOverflow

 */

class StackOverflow {

    static String stackOverflow_largeFrame_liveOopForGC;

    public static int stackOverflow_largeFrame(int call_count, String liveOopForGC) {

        try {

            int return_count = stackOverflow_largeFrame(++call_count, liveOopForGC);

            if (return_count == 0) {

                try {

                    LargeFrame.method_with_many_locals(liveOopForGC, 2,3,4,5,6,7,liveOopForGC);

                } catch (StackOverflowError e2) {

                    // access liveOopForGC to make it a live variable

                    stackOverflow_largeFrame_liveOopForGC = liveOopForGC;

                }

            }

            return return_count - 1;

        } catch (StackOverflowError e) {

            // Return a value that is large enough such that no unrecoverable

            // stack overflow will occur afterwards, but that is small enough

            // such that calling LargeFrame.method_with_many_locals() will

            // cause a StackOverflowError.

            // Don't use a call here because we're out of stack space anyway!

            int tmp = call_count / 2;

            return (tmp < 100 ? tmp : 100);

        }

    }

    public static void main(String args[]) {

        LargeFrame.method_with_many_locals(new Object(), 2,3,4,5,6,7,new Object());

        stackOverflow_largeFrame(0, "this is a live oop to test GC");

        System.out.println("finished ok!");

    }

}