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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

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 * 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

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 *

 * 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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 */

/*

 * @test

 * @summary Test that CDS still works when the JDK is moved to a new directory

 * @requires vm.cds

 * @requires os.family == "linux"

 * @library /test/lib

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

 *          java.management

 *          jdk.jartool/sun.tools.jar

 * @compile test-classes/Hello.java

 * @run main MoveJDKTest

 */

// This test works only on Linux because it depends on symlinks and the name of the hotspot DLL (libjvm.so).

// It probably doesn't work on Windows.

// TODO: change libjvm.so to libjvm.dylib on MacOS, before adding "@requires os.family == mac"

// TODO: test on solaris, before adding "@requires os.family == solaris"

import java.io.File;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.nio.file.StandardCopyOption;

import jdk.test.lib.process.OutputAnalyzer;

public class MoveJDKTest {

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

        String java_home_src = System.getProperty("java.home");

        String java_home_dst = System.getProperty("user.dir") + File.separator + "moved_jdk";

        TestCommon.startNewArchiveName();

        String jsaFile = TestCommon.getCurrentArchiveName();

        String jsaOpt = "-XX:SharedArchiveFile=" + jsaFile;

        {

            ProcessBuilder pb = makeBuilder(java_home_src + "/bin/java", "-Xshare:dump", jsaOpt);

            TestCommon.executeAndLog(pb, "dump");

        }

        {

            ProcessBuilder pb = makeBuilder(java_home_src + "/bin/java",

                                            "-Xshare:auto",

                                            jsaOpt,

                                            "-Xlog:class+path=info",

                                            "-version");

            OutputAnalyzer out = TestCommon.executeAndLog(pb, "exec-src");

            out.shouldNotContain("shared class paths mismatch");

            out.shouldNotContain("BOOT classpath mismatch");

        }

        clone(new File(java_home_src), new File(java_home_dst));

        System.out.println("============== Cloned JDK at " + java_home_dst);

        // Test runtime with cloned JDK

        {

            ProcessBuilder pb = makeBuilder(java_home_dst + "/bin/java",

                                            "-Xshare:auto",

                                            jsaOpt,

                                            "-Xlog:class+path=info",

                                            "-version");

            OutputAnalyzer out = TestCommon.executeAndLog(pb, "exec-dst");

            out.shouldNotContain("shared class paths mismatch");

            out.shouldNotContain("BOOT classpath mismatch");

        }

        // Test with bad JAR file name, hello.modules

        String helloJar = JarBuilder.getOrCreateHelloJar();

        String fake_modules = copyFakeModulesFromHelloJar();

        String dumptimeBootAppendOpt = "-Xbootclasspath/a:" + fake_modules;

        {

            ProcessBuilder pb = makeBuilder(java_home_src + "/bin/java",

                                            "-Xshare:dump",

                                            dumptimeBootAppendOpt,

                                            jsaOpt);

            TestCommon.executeAndLog(pb, "dump");

        }

        {

            String runtimeBootAppendOpt = dumptimeBootAppendOpt + System.getProperty("path.separator") + helloJar;

            ProcessBuilder pb = makeBuilder(java_home_dst + "/bin/java",

                                            "-Xshare:auto",

                                            runtimeBootAppendOpt,

                                            jsaOpt,

                                            "-Xlog:class+path=info",

                                            "-version");

            OutputAnalyzer out = TestCommon.executeAndLog(pb, "exec-dst");

            out.shouldNotContain("shared class paths mismatch");

            out.shouldNotContain("BOOT classpath mismatch");

        }

    }

    // Do a cheap clone of the JDK. Most files can be sym-linked. However, $JAVA_HOME/bin/java and $JAVA_HOME/lib/.../libjvm.so"

    // must be copied, because the java.home property is derived from the canonicalized paths of these 2 files.

    static void clone(File src, File dst) throws Exception {

        if (dst.exists()) {

            if (!dst.isDirectory()) {

                throw new RuntimeException("Not a directory :" + dst);

            }

        } else {

            if (!dst.mkdir()) {

                throw new RuntimeException("Cannot create directory: " + dst);

            }

        }

        for (String child : src.list()) {

            if (child.equals(".") || child.equals("..")) {

                continue;

            }

            File child_src = new File(src, child);

            File child_dst = new File(dst, child);

            if (child_dst.exists()) {

                throw new RuntimeException("Already exists: " + child_dst);

            }

            if (child_src.isFile()) {

                if (child.equals("libjvm.so") || child.equals("java")) {

                    Files.copy(child_src.toPath(), /* copy data to -> */ child_dst.toPath());

                } else {

                    Files.createSymbolicLink(child_dst.toPath(),  /* link to -> */ child_src.toPath());

                }

            } else {

                clone(child_src, child_dst);

            }

        }

    }

    static ProcessBuilder makeBuilder(String... args) throws Exception {

        System.out.print("[");

        for (String s : args) {

            System.out.print(" " + s);

        }

        System.out.println(" ]");

        return new ProcessBuilder(args);

    }

    private static String copyFakeModulesFromHelloJar() throws Exception {

        String classDir = System.getProperty("test.classes");

        String newFile = "hello.modules";

        String path = classDir + File.separator + newFile;

        Files.copy(Paths.get(classDir, "hello.jar"),

            Paths.get(classDir, newFile),

            StandardCopyOption.REPLACE_EXISTING);

        return path;

    }

}