/*

 * Copyright (c) 2014, 2016, 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

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 */

/**

 * @test

 * @bug 8031320

 * @summary Verify that if we use RTMDeopt, then deoptimization

 *          caused by reason other then rtm_state_change will reset

 *          method's RTM state. And if we don't use RTMDeopt, then

 *          RTM state remain the same after such deoptimization.

 * @library /test/lib /

 * @modules java.base/jdk.internal.misc

 *          java.management

 * @build sun.hotspot.WhiteBox

 * @run driver ClassFileInstaller sun.hotspot.WhiteBox

 *                                sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions

 *                   -XX:+WhiteBoxAPI

 *                   compiler.rtm.locking.TestRTMAfterNonRTMDeopt

 */

package compiler.rtm.locking;

import compiler.testlibrary.rtm.AbortProvoker;

import compiler.testlibrary.rtm.CompilableTest;

import compiler.testlibrary.rtm.RTMLockingStatistics;

import compiler.testlibrary.rtm.RTMTestBase;

import jdk.internal.misc.Unsafe;

import jdk.test.lib.Asserts;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.cli.CommandLineOptionTest;

import java.util.List;

/**

 * To verify that with +UseRTMDeopt method's RTM state will be

 * changed to ProfileRTM on deoptimization unrelated to

 * rtm_state_change following sequence of events is used:

 * <pre>

 *

 *     rtm state ^

 *               |

 *       UseRTM  |      ******|     ******

 *               |            |

 *   ProfileRTM  |******|     |*****|

 *               |      |     |     |

 *              0-------|-----|-----|---------------------> time

 *                      |     |     \ force abort

 *                      |     |

 *                      |     \ force deoptimization

 *                      |

 *                      \ force xabort

 * </pre>

 * When xabort is forced by native method call method should

 * change it's state to UseRTM, because we use RTMAbortRatio=100

 * and low RTMLockingThreshold, so at this point actual abort

 * ratio will be below 100% and there should be enough lock

 * attempts to recompile method without RTM profiling.

 */

public class TestRTMAfterNonRTMDeopt {

    private static final int ABORT_THRESHOLD = 1000;

    private static final String RANGE_CHECK = "range_check";

    protected void runTestCases() throws Throwable {

        verifyRTMAfterDeopt(false, false);

        verifyRTMAfterDeopt(true, false);

        verifyRTMAfterDeopt(false, true);

        verifyRTMAfterDeopt(true, true);

    }

    private void verifyRTMAfterDeopt(boolean useStackLock,

            boolean useRTMDeopt) throws Throwable {

        CompilableTest test = new Test();

        String logFile = String.format("rtm_%s_stack_lock_%s_deopt.xml",

                (useStackLock ? "use" : "no"), (useRTMDeopt ? "use" : "no"));

        OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(

                logFile,

                test,

                "-XX:CompileThreshold=1",

                CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",

                        useStackLock),

                CommandLineOptionTest.prepareBooleanFlag("UseRTMDeopt",

                        useRTMDeopt),

                "-XX:RTMAbortRatio=100",

                CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",

                        TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD),

                CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",

                        TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD / 2L),

                "-XX:RTMTotalCountIncrRate=1",

                "-XX:+PrintPreciseRTMLockingStatistics",

                Test.class.getName(),

                Boolean.toString(!useStackLock)

        );

        outputAnalyzer.shouldHaveExitValue(0);

        int traps = RTMTestBase.firedRTMStateChangeTraps(logFile);

        if (useRTMDeopt) {

            Asserts.assertEQ(traps, 2, "Two uncommon traps with "

                    + "reason rtm_state_change should be fired.");

        } else {

            Asserts.assertEQ(traps, 0, "No uncommon traps with "

                    + "reason rtm_state_change should be fired.");

        }

        int rangeCheckTraps = RTMTestBase.firedUncommonTraps(logFile,

                TestRTMAfterNonRTMDeopt.RANGE_CHECK);

        Asserts.assertEQ(rangeCheckTraps, 1,

                "One range_check uncommon trap should be fired.");

        List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(

                test.getMethodWithLockName(), outputAnalyzer.getOutput());

        int expectedStatEntries = (useRTMDeopt ? 4 : 2);

        Asserts.assertEQ(statistics.size(), expectedStatEntries,

                String.format("VM output should contain %d RTM locking "

                        + "statistics entries.", expectedStatEntries));

    }

    public static class Test implements CompilableTest {

        // Following field have to be static in order to avoid escape analysis.

        @SuppressWarnings("UnsuedDeclaration")

        private static int field = 0;

        private static final int ITERATIONS = 10000;

        private static final int RANGE_CHECK_AT = ITERATIONS / 2;

        private static final Unsafe UNSAFE = Unsafe.getUnsafe();

        private final Object monitor = new Object();

        @Override

        public String getMethodWithLockName() {

            return this.getClass().getName() + "::forceAbort";

        }

        @Override

        public String[] getMethodsToCompileNames() {

            return new String[] { getMethodWithLockName() };

        }

        public void forceAbort(int a[], boolean abort) {

            try {

                synchronized(monitor) {

                    a[0]++;

                    if (abort) {

                        Test.field = Test.UNSAFE.pageSize();

                    }

                }

            } catch (Throwable t) {

                // suppress any throwables

            }

        }

        /**

         * Usage:

         * Test <inflate monitor>

         */

        public static void main(String args[]) throws Throwable {

            Test t = new Test();

            boolean shouldBeInflated = Boolean.valueOf(args[0]);

            if (shouldBeInflated) {

                AbortProvoker.inflateMonitor(t.monitor);

            }

            int tmp[] = new int[1];

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

                AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);

                if (i == Test.RANGE_CHECK_AT) {

                    t.forceAbort(new int[0], false);

                } else {

                    boolean isThreshold

                            = (i == TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD);

                    boolean isThresholdPlusRange

                            = (i == TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD

                            + Test.RANGE_CHECK_AT);

                    t.forceAbort(tmp, isThreshold || isThresholdPlusRange);

                }

            }

        }

    }

    public static void main(String args[]) throws Throwable {

        new TestRTMAfterNonRTMDeopt().runTestCases();

    }

}