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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/stack008.
 * VM testbase keywords: [stress, stack, nonconcurrent]
 * VM testbase readme:
 * DESCRIPTION
 *     This test provokes multiple stack overflows in the same thread
 *     by invocations via reflection. Recursive method is invoked for
 *     the given fixed depth of recursion (though, for a large depth).
 *     This test makes measures a number of recursive invocations
 *     before 1st StackOverflowError, and then tries to reproduce
 *     such StackOverflowError 100 times -- each time by trying to
 *     invoke the same recursive method for the given fixed depth
 *     of invocations (which is twice that depth just measured).
 *     The test is deemed passed, if VM have not crashed.
 * COMMENTS
 *     This test crashes all HS versions (2.0, 1.3, 1.4) on Solaris,
 *     and crashes HS 2.0 on win32. However, it passes against HS 1.3
 *     and 1.4 on Win32.
 *     See the bug:
 *     4366625 (P4/S4) multiple stack overflow causes HS crash
 *     The stack size is too small to run on systems with > 4K page size.
 *     Making it bigger could cause timeouts on other platform.
 *
 * @requires (vm.opt.DeoptimizeALot != true & vm.compMode != "Xcomp" & vm.pageSize == 4096)
 * @run main/othervm/timeout=900 -Xss200K Stack008
 */

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Stack008 {
    public static void main(String[] args) {
        int depth;
        //
        // Measure maximal recursion depth until stack overflow:
        //
        for (depth = 100; ; depth += 100) {
            try {
                invokeRecurse(depth);
            } catch (Throwable exception) {
                Throwable target = getTargetException(exception);
                if ((target instanceof StackOverflowError) ||
                        (target instanceof OutOfMemoryError))
                    break; // OK.
                target.printStackTrace();
                throw new RuntimeException(exception);
            }
        }
        System.out.println("Max. depth: " + depth);
        //
        // Provoke stack overflow multiple times:
        //
        for (int i = 0; i < 100; i++) {
            try {
                invokeRecurse(2 * depth);
//              System.out.println("?");
            } catch (Throwable exception) {
                Throwable target = getTargetException(exception);
                if ((target instanceof StackOverflowError) ||
                        (target instanceof OutOfMemoryError))
                    continue; // OK.
                target.printStackTrace();
                throw new RuntimeException(exception);
            }
        }
    }

    private static Throwable getTargetException(Throwable exception) {
        Throwable target;
        //
        // Unwrap deep chain of exceptions:
        //
        for (
                target = exception;
                target instanceof InvocationTargetException;
                target = ((InvocationTargetException) target).getTargetException()
                )
            ;
        return target;
    }

    static Method method = null;
    static Stack008 instance = null;
    static Object params[] = null;

    private static void invokeRecurse(int depth) throws Exception {
        if (method == null) {
            //
            // Optimization trick: allocate once, use everywhere.
            //
            instance = new Stack008();
            method = Stack008.class.getMethod("recurse");
            params = new Object[]{};
        }
        //
        // Note, that the same instance.depth is used in all invocations:
        //
        instance.depth = depth;
        method.invoke(instance, params);
    }

    int depth = 0;

    public void recurse() throws Exception {
        if (depth > 0) {
            //
            // Self-invoke via reflection:
            //
            invokeRecurse(depth - 1);
        }
    }
}