/*

 * 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 6942326

 * @summary x86 code in string_indexof() could read beyond reserved heap space

 *

 * @run main/othervm/timeout=300 -Xmx128m -Xbatch -XX:+IgnoreUnrecognizedVMOptions

 *      -XX:CompileCommand=exclude,compiler.codegen.Test6942326::main

 *      -XX:CompileCommand=exclude,compiler.codegen.Test6942326::test_varsub_indexof

 *      -XX:CompileCommand=exclude,compiler.codegen.Test6942326::test_varstr_indexof

 *      -XX:CompileCommand=exclude,compiler.codegen.Test6942326::test_missub_indexof

 *      -XX:CompileCommand=exclude,compiler.codegen.Test6942326::test_consub_indexof

 *      -XX:CompileCommand=exclude,compiler.codegen.Test6942326::test_conmis_indexof

 *      -XX:CompileCommand=exclude,compiler.codegen.Test6942326::test_subcon

 *      compiler.codegen.Test6942326

 */

package compiler.codegen;

public class Test6942326 {

    static String[] strings = new String[1024];

    private static final int ITERATIONS = 100000;

    public static void main(String[] args) {

        long start_total = System.currentTimeMillis();

        // search variable size substring in string (33 chars).

        String a = " 1111111111111xx1111111111111xx11y"; // +1 to execute a.substring(1) first

        String b =  "1111111111111xx1111111111111xx11y";

        test_varsub_indexof(a, b);

        // search variable size substring in string (32 chars).

        a = " 1111111111111xx1111111111111xx1y";

        b =  "1111111111111xx1111111111111xx1y";

        test_varsub_indexof(a, b);

        // search variable size substring in string (17 chars).

        a = " 1111111111111xx1y";

        b =  "1111111111111xx1y";

        test_varsub_indexof(a, b);

        // search variable size substring in string (16 chars).

        a = " 111111111111xx1y";

        b =  "111111111111xx1y";

        test_varsub_indexof(a, b);

        // search variable size substring in string (8 chars).

        a = " 1111xx1y";

        b =  "1111xx1y";

        test_varsub_indexof(a, b);

        // search variable size substring in string (7 chars).

        a = " 111xx1y";

        b =  "111xx1y";

        test_varsub_indexof(a, b);

        // search substring (17 chars) in variable size string.

        a =                 "1111111111111xx1x";

        b = " 1111111111111xx1111111111111xx1x"; // +1 to execute b.substring(1) first

        test_varstr_indexof(a, b);

        // search substring (16 chars) in variable size string.

        a =                  "111111111111xx1x";

        b = " 1111111111111xx1111111111111xx1x";

        test_varstr_indexof(a, b);

        // search substring (9 chars) in variable size string.

        a =                         "11111xx1x";

        b = " 1111111111111xx1111111111111xx1x";

        test_varstr_indexof(a, b);

        // search substring (8 chars) in variable size string.

        a =                          "1111xx1x";

        b = " 1111111111111xx1111111111111xx1x";

        test_varstr_indexof(a, b);

        // search substring (4 chars) in variable size string.

        a =                              "xx1x";

        b = " 1111111111111xx1111111111111xx1x";

        test_varstr_indexof(a, b);

        // search substring (3 chars) in variable size string.

        a =                               "x1x";

        b = " 1111111111111xx1111111111111xx1x";

        test_varstr_indexof(a, b);

        // search substring (2 chars) in variable size string.

        a =                                "1y";

        b = " 1111111111111xx1111111111111xx1y";

        test_varstr_indexof(a, b);

        // search non matching variable size substring in string (33 chars).

        a = " 1111111111111xx1111111111111xx11z"; // +1 to execute a.substring(1) first

        b =  "1111111111111xx1111111111111xx11y";

        test_missub_indexof(a, b);

        // search non matching variable size substring in string (32 chars).

        a = " 1111111111111xx1111111111111xx1z";

        b =  "1111111111111xx1111111111111xx1y";

        test_missub_indexof(a, b);

        // search non matching variable size substring in string (17 chars).

        a = " 1111111111111xx1z";

        b =  "1111111111111xx1y";

        test_missub_indexof(a, b);

        // search non matching variable size substring in string (16 chars).

        a = " 111111111111xx1z";

        b =  "111111111111xx1y";

        test_missub_indexof(a, b);

        // search non matching variable size substring in string (8 chars).

        a = " 1111xx1z";

        b =  "1111xx1y";

        test_missub_indexof(a, b);

        // search non matching variable size substring in string (7 chars).

        a = " 111xx1z";

        b =  "111xx1y";

        test_missub_indexof(a, b);

        // Testing constant substring search in variable size string.

        // search constant substring (17 chars).

        b = " 1111111111111xx1111111111111xx1x"; // +1 to execute b.substring(1) first

        TestCon tc = new TestCon17();

        test_consub_indexof(tc, b);

        // search constant substring (16 chars).

        b = " 1111111111111xx1111111111111xx1x";

        tc = new TestCon16();

        test_consub_indexof(tc, b);

        // search constant substring (9 chars).

        b = " 1111111111111xx1111111111111xx1x";

        tc = new TestCon9();

        test_consub_indexof(tc, b);

        // search constant substring (8 chars).

        b = " 1111111111111xx1111111111111xx1x";

        tc = new TestCon8();

        test_consub_indexof(tc, b);

        // search constant substring (4 chars).

        b = " 1111111111111xx1111111111111xx1x";

        tc = new TestCon4();

        test_consub_indexof(tc, b);

        // search constant substring (3 chars).

        b = " 1111111111111xx1111111111111xx1x";

        tc = new TestCon3();

        test_consub_indexof(tc, b);

        // search constant substring (2 chars).

        b = " 1111111111111xx1111111111111xx1y";

        tc = new TestCon2();

        test_consub_indexof(tc, b);

        // search constant substring (1 chars).

        b = " 1111111111111xx1111111111111xx1y";

        tc = new TestCon1();

        test_consub_indexof(tc, b);

        // search non matching constant substring (17 chars).

        b = " 1111111111111xx1111111111111xx1z"; // +1 to execute b.substring(1) first

        tc = new TestCon17();

        test_conmis_indexof(tc, b);

        // search non matching constant substring (16 chars).

        b = " 1111111111111xx1111111111111xx1z";

        tc = new TestCon16();

        test_conmis_indexof(tc, b);

        // search non matching constant substring (9 chars).

        b = " 1111111111111xx1111111111111xx1z";

        tc = new TestCon9();

        test_conmis_indexof(tc, b);

        // search non matching constant substring (8 chars).

        b = " 1111111111111xx1111111111111xx1z";

        tc = new TestCon8();

        test_conmis_indexof(tc, b);

        // search non matching constant substring (4 chars).

        b = " 1111111111111xx1111111111111xx1z";

        tc = new TestCon4();

        test_conmis_indexof(tc, b);

        // search non matching constant substring (3 chars).

        b = " 1111111111111xx1111111111111xx1z";

        tc = new TestCon3();

        test_conmis_indexof(tc, b);

        // search non matching constant substring (2 chars).

        b = " 1111111111111xx1111111111111xx1z";

        tc = new TestCon2();

        test_conmis_indexof(tc, b);

        // search non matching constant substring (1 chars).

        b = " 1111111111111xx1111111111111xx1z";

        tc = new TestCon1();

        test_conmis_indexof(tc, b);

        long end_total = System.currentTimeMillis();

        System.out.println("End run time: " + (end_total - start_total));

    }

    public static long test_init(String a, String b) {

        for (int i = 0; i < 512; i++) {

            strings[i * 2] = new String(b.toCharArray());

            strings[i * 2 + 1] = new String(a.toCharArray());

        }

        System.out.print(a.length() + " " + b.length() + " ");

        return System.currentTimeMillis();

    }

    public static void test_end(String a, String b, int v, int expected, long start) {

        long end = System.currentTimeMillis();

        int res = (v/ITERATIONS);

        System.out.print(" " + res);

        System.out.println(" time:" + (end - start));

        if (res != expected) {

            System.out.println("wrong indexOf result: " + res + ", expected " + expected);

            System.out.println("\"" + b + "\".indexOf(\"" + a + "\")");

            System.exit(97);

        }

    }

    public static int test_subvar() {

        int s = 0;

        int v = 0;

        for (int i = 0; i < ITERATIONS; i++) {

            v += strings[s].indexOf(strings[s + 1]);

            s += 2;

            if (s >= strings.length) s = 0;

        }

        return v;

    }

    public static void test_varsub_indexof(String a, String b) {

        System.out.println("Start search variable size substring in string (" + b.length() + " chars)");

        long start_it = System.currentTimeMillis();

        int limit = 1; // last a.length() == 1

        while (a.length() > limit) {

            a = a.substring(1);

            long start = test_init(a, b);

            int v = test_subvar();

            test_end(a, b, v, (b.length() - a.length()), start);

        }

        long end_it = System.currentTimeMillis();

        System.out.println("End search variable size substring in string (" + b.length() + " chars), time: " + (end_it - start_it));

    }

    public static void test_varstr_indexof(String a, String b) {

        System.out.println("Start search substring (" + a.length() + " chars) in variable size string");

        long start_it = System.currentTimeMillis();

        int limit = a.length();

        while (b.length() > limit) {

            b = b.substring(1);

            long start = test_init(a, b);

            int v = test_subvar();

            test_end(a, b, v, (b.length() - a.length()), start);

        }

        long end_it = System.currentTimeMillis();

        System.out.println("End search substring (" + a.length() + " chars) in variable size string, time: " + (end_it - start_it));

    }

    public static void test_missub_indexof(String a, String b) {

        System.out.println("Start search non matching variable size substring in string (" + b.length() + " chars)");

        long start_it = System.currentTimeMillis();

        int limit = 1; // last a.length() == 1

        while (a.length() > limit) {

            a = a.substring(1);

            long start = test_init(a, b);

            int v = test_subvar();

            test_end(a, b, v, (-1), start);

        }

        long end_it = System.currentTimeMillis();

        System.out.println("End search non matching variable size substring in string (" + b.length() + " chars), time: " + (end_it - start_it));

    }

    public static void test_consub_indexof(TestCon tc, String b) {

        System.out.println("Start search constant substring (" + tc.constr().length() + " chars)");

        long start_it = System.currentTimeMillis();

        int limit = tc.constr().length();

        while (b.length() > limit) {

            b = b.substring(1);

            long start = test_init(tc.constr(), b);

            int v = test_subcon(tc);

            test_end(tc.constr(), b, v, (b.length() - tc.constr().length()), start);

        }

        long end_it = System.currentTimeMillis();

        System.out.println("End search constant substring (" + tc.constr().length() + " chars), time: " + (end_it - start_it));

    }

    public static void test_conmis_indexof(TestCon tc, String b) {

        System.out.println("Start search non matching constant substring (" + tc.constr().length() + " chars)");

        long start_it = System.currentTimeMillis();

        int limit = tc.constr().length();

        while (b.length() > limit) {

            b = b.substring(1);

            long start = test_init(tc.constr(), b);

            int v = test_subcon(tc);

            test_end(tc.constr(), b, v, (-1), start);

        }

        long end_it = System.currentTimeMillis();

        System.out.println("End search non matching constant substring (" + tc.constr().length() + " chars), time: " + (end_it - start_it));

    }

    public static int test_subcon(TestCon tc) {

        int s = 0;

        int v = 0;

        for (int i = 0; i < ITERATIONS; i++) {

            v += tc.indexOf(strings[s]);

            s += 2;

            if (s >= strings.length) s = 0;

        }

        return v;

    }

    private interface TestCon {

        public String constr();

        public int indexOf(String str);

    }

    // search constant substring (17 chars).

    private final static class TestCon17 implements TestCon {

        private static final String constr = "1111111111111xx1x";

        public String constr() { return constr; }

        public int indexOf(String str) { return str.indexOf(constr); }

    }

    // search constant substring (16 chars).

    private final static class TestCon16 implements TestCon {

        private static final String constr = "111111111111xx1x";

        public String constr() { return constr; }

        public int indexOf(String str) { return str.indexOf(constr); }

    }

    // search constant substring (9 chars).

    private final static class TestCon9 implements TestCon {

        private static final String constr = "11111xx1x";

        public String constr() { return constr; }

        public int indexOf(String str) { return str.indexOf(constr); }

    }

    // search constant substring (8 chars).

    private final static class TestCon8 implements TestCon {

        private static final String constr = "1111xx1x";

        public String constr() { return constr; }

        public int indexOf(String str) { return str.indexOf(constr); }

    }

    // search constant substring (4 chars).

    private final static class TestCon4 implements TestCon {

        private static final String constr = "xx1x";

        public String constr() { return constr; }

        public int indexOf(String str) { return str.indexOf(constr); }

    }

    // search constant substring (3 chars).

    private final static class TestCon3 implements TestCon {

        private static final String constr = "x1x";

        public String constr() { return constr; }

        public int indexOf(String str) { return str.indexOf(constr); }

    }

    // search constant substring (2 chars).

    private final static class TestCon2 implements TestCon {

        private static final String constr = "1y";

        public String constr() { return constr; }

        public int indexOf(String str) { return str.indexOf(constr); }

    }

    // search constant substring (1 chars).

    private final static class TestCon1 implements TestCon {

        private static final String constr = "y";

        public String constr() { return constr; }

        public int indexOf(String str) { return str.indexOf(constr); }

    }

}