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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @key stress
 *
 * @summary converted from VM testbase nsk/stress/stack/stack016.
 * VM testbase keywords: [stress, diehard, stack, nonconcurrent]
 * VM testbase readme:
 * DESCRIPTION
 *     The test provokes second stack overflow from within the
 *     stack overflow handler -- repeatedly multiple times, and
 *     in multiple threads.
 *     This test measures a number of recursive invocations until
 *     stack overflow, and then tries to provoke similar stack overflows
 *     in 10 times in each of 10 threads. Each provocation consists of
 *     invoking that recursive method for the given fixed depth
 *     of invocations which is 100 times that depth measured before,
 *     and then trying to invoke that recursive method once again
 *     from within the catch clause just caught StackOverflowError.
 *     The test is deemed passed, if VM have not crashed, and
 *     if exception other than due to stack overflow was not
 *     thrown.
 * COMMENTS
 *     This test crashes HS versions 2.0, 1.3, and 1.4 on both
 *     Solaris and Win32 platforms.
 *     See the bug:
 *     4366625 (P4/S4) multiple stack overflow causes HS crash
 *
 * @requires (vm.opt.DeoptimizeALot != true & vm.compMode != "Xcomp")
 * @run main/othervm/timeout=900 -Xint -Xss448K Stack016
 * @run main/othervm/timeout=900 -Xcomp -Xss448K Stack016
 * @run main/othervm/timeout=900 -Xcomp -XX:-TieredCompilation -Xss448K Stack016
 */

public class Stack016 extends Thread {
    private final static int THREADS = 10;
    private final static int CYCLES = 10;
    private final static int STEP = 10;
    private final static int RESERVE = 10;
    private final static int PROBES = STEP * RESERVE;

    public static void main(String[] args) {
        Stack016 test = new Stack016();
        test.doRun();
    }

    private void doRun() {
        //
        // Measure recursive depth before stack overflow:
        //
        int maxDepth = 0;
        for (depthToTry = 0; ; depthToTry += STEP) {
            try {
                trickyRecurse(depthToTry);
                maxDepth = depthToTry;
            } catch (StackOverflowError | OutOfMemoryError ex) {
                break;
            }
        }
        System.out.println("Maximal recursion depth: " + maxDepth);

        //
        // Run the tested threads:
        //
        Stack016 threads[] = new Stack016[THREADS];
        for (int i = 0; i < threads.length; i++) {
            threads[i] = new Stack016();
            threads[i].setName("Thread: " + (i + 1) + "/" + THREADS);
            threads[i].depthToTry = RESERVE * maxDepth * 10;
            threads[i].start();
        }
        for (int i = 0; i < threads.length; i++) {
            if (threads[i].isAlive()) {
                try {
                    threads[i].join();
                } catch (InterruptedException exception) {
                    throw new RuntimeException(exception);
                }
            }
        }

        //
        // Check if unexpected exceptions were thrown:
        //
        for (int i = 0; i < threads.length; i++) {
            if (threads[i].thrown != null) {
                threads[i].thrown.printStackTrace();
                throw new RuntimeException("Exception in the thread " + threads[i], threads[i].thrown);
            }
        }
    }

    private int stackTop = 0;
    private int depthToTry = 0;
    private Throwable thrown = null;

    private void trickyRecurse(int depth) {
        stackTop = depthToTry - depth;
        if (depth > 0) {
            try {
                trickyRecurse(depth - 1);
            } catch (StackOverflowError | OutOfMemoryError error) {
                //
                // Provoke more stack overflow,
                // if current stack is deep enough:
                //
                if (depthToTry - depth < stackTop - PROBES)
                    throw error;
                recurse(depthToTry);

                throw new Error("TEST_RFE: try deeper recursion!");
            }
        }
    }

    private static void recurse(int depth) {
        if (depth > 0) {
            recurse(depth - 1);
        }
    }

    public void run() {
        String threadName = Thread.currentThread().getName();
        for (int i = 1; i <= CYCLES; i++) {
            try {
                System.out.println(threadName + ", iteration: " + i + "/" + CYCLES +
                        ", depthToTry: " + depthToTry);
                trickyRecurse(depthToTry);
                throw new Error(
                        "TEST_BUG: trickyRecursion() must throw an error anyway!");

            } catch (StackOverflowError | OutOfMemoryError err) {
                // It's OK
            } catch (Throwable throwable) {
                thrown = throwable;
                break;
            }
        }
    }
}