Java example source code file (XCheckJSig.java)

This example Java source code file (XCheckJSig.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

dyld_insert_libraries, ld_preload, map, outputanalyzer, processbuilder, string, throwable, util, xcheck:jni, xcheckjsig

The XCheckJSig.java Java example source code

/*
 * Copyright (c) 2013, 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.
 */

/*
 * @ignore 8023735
 * @test
 * @bug 7051189 8023393
 * @summary Need to suppress info message if -Xcheck:jni is used with libjsig.so
 * @library /testlibrary
 * @run main XCheckJSig
 */

import java.util.*;
import com.oracle.java.testlibrary.*;

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

        System.out.println("Regression test for bugs 7051189 and 8023393");
        if (!Platform.isSolaris() && !Platform.isLinux() && !Platform.isOSX()) {
            System.out.println("Test only applicable on Solaris, Linux, and Mac OSX, skipping");
            return;
        }

        String jdk_path = System.getProperty("test.jdk");
        String os_arch = Platform.getOsArch();
        String libjsig;
        String env_var;
        if (Platform.isOSX()) {
            libjsig = jdk_path + "/jre/lib/server/libjsig.dylib";
            env_var = "DYLD_INSERT_LIBRARIES";
        } else {
            libjsig = jdk_path + "/jre/lib/" + os_arch + "/libjsig.so";
            env_var = "LD_PRELOAD";
        }
        String java_program;
        if (Platform.isSolaris()) {
            // On Solaris, need to call the 64-bit Java directly in order for
            // LD_PRELOAD to work because libjsig.so is 64-bit.
            java_program = jdk_path + "/jre/bin/" + os_arch + "/java";
        } else {
            java_program = JDKToolFinder.getJDKTool("java");
        }
        // If this test fails, these might be useful to know.
        System.out.println("libjsig: " + libjsig);
        System.out.println("osArch: " + os_arch);
        System.out.println("java_program: " + java_program);

        ProcessBuilder pb = new ProcessBuilder(java_program, "-Xcheck:jni", "-version");
        Map<String, String> env = pb.environment();
        env.put(env_var, libjsig);
        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        output.shouldNotContain("libjsig is activated");
        output.shouldHaveExitValue(0);

        pb = new ProcessBuilder(java_program, "-Xcheck:jni", "-verbose:jni", "-version");
        env = pb.environment();
        env.put(env_var, libjsig);
        output = new OutputAnalyzer(pb.start());
        output.shouldContain("libjsig is activated");
        output.shouldHaveExitValue(0);
    }
}