test/997-single-step/src/art/Test997.java

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package art;

import java.util.Arrays;
import java.lang.reflect.Executable;
import java.lang.reflect.Method;

public class Test997 {
    static final int NO_LAST_LINE_NUMBER = -1;
    static int LAST_LINE_NUMBER = NO_LAST_LINE_NUMBER;
    static Method DO_MULTIPATH_METHOD;

    static {
        try {
            DO_MULTIPATH_METHOD = Test997.class.getDeclaredMethod("doMultiPath", Boolean.TYPE);
        } catch (Exception e) {
            throw new Error("could not find method doMultiPath", e);
        }
    }

    // Function that acts simply to ensure there are multiple lines.
    public static void doNothing() {}

    // Method with multiple paths we can break on.
    public static void doMultiPath(boolean bit) {
        doNothing();
        if (bit) {
            doNothing();
        } else {
            doNothing();
        }
        doNothing();
    }

    public static void notifySingleStep(Thread thr, Executable e, long loc) {
        if (!e.equals(DO_MULTIPATH_METHOD)) {
            // Only report steps in doMultiPath
            return;
        }
        int cur_line = Breakpoint.locationToLine(e, loc);
        // Only report anything when the line number changes. This is so we can run this test
        // against both the RI and ART and also to prevent front-end compiler changes from
        // affecting output.
        if (LAST_LINE_NUMBER == NO_LAST_LINE_NUMBER || LAST_LINE_NUMBER != cur_line) {
            LAST_LINE_NUMBER = cur_line;
            System.out.println("Single step: " + e + " @ line=" + cur_line);
        }
    }

    public static void resetTest() {
        LAST_LINE_NUMBER = NO_LAST_LINE_NUMBER;
    }

    public static void run() throws Exception {
        boolean[] values = new boolean[] { true, false };
        Trace.enableSingleStepTracing(Test997.class,
                Test997.class.getDeclaredMethod(
                        "notifySingleStep", Thread.class, Executable.class, Long.TYPE),
                Thread.currentThread());
        for (boolean arg : values) {
            System.out.println("Stepping through doMultiPath(" + arg + ")");
            resetTest();
            doMultiPath(arg);
        }

        Trace.disableTracing(Thread.currentThread());
    }
}