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/*
 * @test
 * @key stress
 *
 * @summary converted from VM testbase nsk/stress/stack/stack002.
 * VM testbase keywords: [stress, quick, stack, nonconcurrent]
 * VM testbase readme:
 * DESCRIPTION
 *     Provoke StackOverflowError by infinite recursion in Java method,
 *     intercept the exception and continue to invoke that method until
 *     the test exceeds timeout, or until Java VM crashes.
 * COMMENTS
 *     I believe that the test causes HS crashes due to the following bug:
 *     4330318 (P2/S2) NSK test fails as An irrecoverable stack overflow
 *     See also bugs (lots of bugs!):
 *     Evaluated:
 *     4217960 [native stack overflow bug] reflection test causes crash
 *     Accepted:
 *     4285716 native stack overflow causes crash on Solaris
 *     4281578 Second stack overflow crashes HotSpot VM
 *     Closed (duplicate):
 *     4027933     Native stack overflows not detected or handled correctly
 *     4134353     (hpi) sysThreadCheckStack is a no-op on win32
 *     4185411     Various crashes when using recursive reflection.
 *     4167055     infinite recursion in FindClass
 *     4222359     Infinite recursion crashes jvm
 *     Closed (will not fix):
 *     4231968 StackOverflowError in a native method causes Segmentation Fault
 *     4254634     println() while catching StackOverflowError causes hotspot VM crash
 *     4302288 the second stack overflow causes Classic VM to exit on win32
 *
 * @requires vm.opt.DeoptimizeALot != true
 * @run main/othervm/timeout=900 Stack002
 */

public class Stack002 {
    static final long timeout = 10000; // 10 seconds

    public static void main(String[] args) {
        Tester tester = new Tester();
        Timer timer = new Timer(tester);
        timer.start();
        tester.start();
        while (timer.isAlive()) {
            try {
                timer.join();
            } catch (InterruptedException e) {
                e.printStackTrace();
                throw new RuntimeException(e);
            }
        }
        System.out.println("Maximal depth: " + tester.maxdepth);
    }

    private static class Tester extends Thread {
        int maxdepth;
        public volatile boolean stop;

        public Tester() {
            maxdepth = 0;
            stop = false;
        }

        public void run() {
            recurse(0);
        }

        void recurse(int depth) {
            maxdepth = depth;
            try {
                if (stop) {
                    return;
                }
                recurse(depth + 1);
            } catch (StackOverflowError | OutOfMemoryError e) {
                recurse(depth + 1);
            }
        }
    }

    private static class Timer extends Thread {
        private Tester tester;

        public Timer(Tester tester) {
            this.tester = tester;
        }

        public void run() {
            long started;
            started = System.currentTimeMillis();
            while (System.currentTimeMillis() - started < timeout) {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                    return;
                };
            }
            tester.stop = true;
        }
    }
}