TestLoadPinnedAfterCall.java

/*
 * Copyright (c) 2020, Red Hat, Inc. 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
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 * questions.
 */

/**
 * @test
 * @bug 8251527
 * @summary CTW: C2 (Shenandoah) compilation fails with SEGV due to unhandled catchproj == NUL
 * @requires vm.flavor == "server"
 * @requires vm.gc.Shenandoah
 *
 * @run main/othervm -XX:+UseShenandoahGC -XX:CompileOnly=TestLoadPinnedAfterCall.test -XX:CompileCommand=dontinline,TestLoadPinnedAfterCall.not_inlined -XX:-TieredCompilation -XX:-BackgroundCompilation TestLoadPinnedAfterCall
 *
 */

public class TestLoadPinnedAfterCall {
    private A staticField1;
    private static Object staticField2 = new Object();
    private static volatile int staticField3;
    private static int staticField4;
    static TestLoadPinnedAfterCall object = new TestLoadPinnedAfterCall();

    public static void main(String[] args) {
        final A a = new A();
        try {
            throw new Exception();
        } catch (Exception ex) {
        }
        for (int i = 0; i < 20_000; i++) {
            inlined(0, 0, 0);
            inlined(2, 0, 0);
            inlined(2, 2, 2);

            object.staticField1 = new A();
            test(true, a, a, false, 2, 2);
            test(false, a, a, true, 2, 2);
            test(false, a, a, false, 2, 2);
            object.staticField1 = a;
            test(true, a, a, false, 2, 2);
            test(false, a, a, true, 2, 2);
            test(false, a, a, false, 2, 2);
        }
    }

    private static void test(boolean flag, A a, A a2, boolean flag2, int i1, int i2) {

        int ii = 1;
        for (; ii < 2; ii *= 2) {

        }
        ii = ii / 2;

        i1 = 0;
        for (; i1 < 2; i1 += ii) {
            for (int i = 0; i < 2; i += ii) {

            }
        }

        i2 = 0;
        for (; i2 < 2; i2 += ii) {
            for (int i = 0; i < 2; i += ii) {
                for (int j = 0; j < 2; j += ii) {

                }

            }
        }

        TestLoadPinnedAfterCall obj = object;
        if (obj == null) {
        }
        counter = 10;
        for (;;) {
            synchronized (staticField2) {
            }
            int i = 0;
            for (; i < 2; i += ii) {

            }

            inlined(i, i1, i2);

            if (flag) {
                staticField3 = 0x42;
                break;
            }
            try {
                not_inlined();
                if (flag2) {
                    break;
                }
            } catch (Throwable throwable) {
                if (a == obj.staticField1) {
                    staticField4 = 0x42;
                }
                break;
            }
        }
        if (a2 == obj.staticField1) {
            staticField4 = 0x42;
        }
    }

    private static void inlined(int i, int j, int k) {
        if (i == 2) {
            if (j == 2) {
                staticField3 = 0x42;
            }
            if (k == 2) {
                staticField3 = 0x42;
            }
        }
    }

    static int counter = 0;
    private static void not_inlined() {
        counter--;
        if (counter <= 0) {
            throw new RuntimeException();
        }
    }

    private static class A {
    }
}