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/*
* Copyright (c) 2018, 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.
*/
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.*;
import java.util.*;
import static jdk.test.lib.Asserts.*;
import jdk.test.lib.JDKToolFinder;
import jdk.test.lib.process.ProcessTools;
/*
* @test
* @bug 8214230
* @summary Test that jlinks generates reproducible modules files
* @library /test/lib
* @run driver JLinkReproducibleTest
*/
public class JLinkReproducibleTest {
private static void run(List<String> cmd) throws Exception {
var pb = new ProcessBuilder(cmd.toArray(new String[0]));
var res = ProcessTools.executeProcess(pb);
res.shouldHaveExitValue(0);
}
private static void jlink(Path image) throws Exception {
var cmd = new ArrayList<String>();
cmd.add(JDKToolFinder.getJDKTool("jlink"));
cmd.addAll(List.of(
"--module-path", JMODS_DIR.toString() + File.pathSeparator + CLASS_DIR.toString(),
"--add-modules", "main",
"--compress=2",
"--output", image.toString()
));
run(cmd);
}
private static void javac(String... args) throws Exception {
var cmd = new ArrayList<String>();
cmd.add(JDKToolFinder.getJDKTool("javac"));
cmd.addAll(Arrays.asList(args));
run(cmd);
}
private static final List<String> MODULE_INFO = List.of(
"module main {",
" exports org.test.main;",
"}"
);
private static final List<String> MAIN_CLASS = List.of(
"package org.test.main;",
"public class Main {",
" public static void main(String[] args) {",
" System.out.println(\"Hello, world\");",
" }",
"}"
);
private static final Path CLASS_DIR = Path.of("classes");
private static final Path JMODS_DIR = Path.of(System.getProperty("java.home"), "jmods");
public static void main(String[] args) throws Exception {
// Write the source code
var srcDir = Path.of("main", "org", "test", "main");
Files.createDirectories(srcDir.toAbsolutePath());
var srcFile = srcDir.resolve("Main.java");
Files.write(srcFile, MAIN_CLASS);
var moduleFile = Path.of("main").resolve("module-info.java");
Files.write(moduleFile, MODULE_INFO);
// Compile the source code to class files
javac("--module-source-path", ".",
"--module", "main",
"-d", CLASS_DIR.toString());
// Link the first image
var firstImage = Path.of("image-first");
jlink(firstImage);
var firstModulesFile = firstImage.resolve("lib")
.resolve("modules");
// Link the second image
var secondImage = Path.of("image-second");
jlink(secondImage);
var secondModulesFile = secondImage.resolve("lib")
.resolve("modules");
// Ensure module files are identical
assertEquals(-1L, mismatch(firstModulesFile, secondModulesFile));
}
// Copy from JDK-8202302
public static long mismatch(Path path, Path path2) throws IOException {
// buffer size used for reading and writing
final int BUFFER_SIZE = 8192;
if (Files.isSameFile(path, path2)) {
return -1;
}
byte[] buffer1 = new byte[BUFFER_SIZE];
byte[] buffer2 = new byte[BUFFER_SIZE];
try (InputStream in1 = Files.newInputStream(path);
InputStream in2 = Files.newInputStream(path2);) {
long totalRead = 0;
while (true) {
int nRead1 = in1.readNBytes(buffer1, 0, BUFFER_SIZE);
int nRead2 = in2.readNBytes(buffer2, 0, BUFFER_SIZE);
int i = Arrays.mismatch(buffer1, 0, nRead1, buffer2, 0, nRead2);
if (i > -1) {
return totalRead + i;
}
if (nRead1 < BUFFER_SIZE) {
// we've reached the end of the files, but found no mismatch
return -1;
}
totalRead += nRead1;
}
}
}
}
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