test/hotspot/jtreg/vmTestbase/nsk/jvmti/scenarios/jni_interception/JI05/ji05t001.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
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 * 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.
 *
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package nsk.jvmti.scenarios.jni_interception.JI05;

import java.io.*;
import java.util.*;
import nsk.share.*;

/**
 * The test exercises the JVMTI target area "JNI Function Interception".
 * It implements the following scenario:<br>
 * <code>Let agent A of first JVMTI environment redirects a JNI function,
 * then agent B of second JVMTI environment redirects the same
 * function. Check that last redirection takes effect in agent A.</code>
 * <p>
 * The test works as follows. On phase JVM_OnLoad event VMInit is
 * enabled. Upon receiving the event, two separate agent threads are
 * started, each of them with its own JVMTI environment. The agent A
 * running in one JVMTI environment redirects the JNI function
 * GetVersion(). Then that redirection is checked in the agent B
 * running in another JVMTI environment, and vise versa for redirection
 * made by the agent B.
 */
public class ji05t001 {
    static {
        try {
            System.loadLibrary("ji05t001");
        } catch (UnsatisfiedLinkError ule) {
            System.err.println("Could not load \"ji05t001\" library");
            System.err.println("java.library.path:"
                + System.getProperty("java.library.path"));
            throw ule;
        }
    }

    native int getResult();

    public static void main(String args[]) {
        args = nsk.share.jvmti.JVMTITest.commonInit(args);

        // produce JCK-like exit status.
        System.exit(run(args, System.out) + Consts.JCK_STATUS_BASE);
    }

    public static int run(String args[], PrintStream out) {
        return new ji05t001().runIt(args, out);
    }

    private int runIt(String args[], PrintStream out) {
        return getResult();
    }
}