jdk/test/hotspot/jtreg/runtime/LoadClass/TestSymlinkLoad.java
Anton Artemov 85b24c3c4e 8350869: os::stat doesn't follow symlinks on Windows
Reviewed-by: dholmes, mgronlun
2025-05-22 07:56:34 +00:00

103 lines
4.0 KiB
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
* under the terms of the GNU General Public License version 2 only, as
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*
* 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
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*
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* 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 JVM should be able to handle loading class via symlink on windows
* @requires vm.flagless
* @library /test/lib
* @run testng/othervm TestSymlinkLoad
*/
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import jdk.test.lib.compiler.CompilerUtils;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.util.FileUtils;
import org.testng.SkipException;
import org.testng.annotations.Test;
public class TestSymlinkLoad {
@Test
public void testSymlinkClassLoading() throws Exception {
Path sourceDir = Paths.get(System.getProperty("test.src"), "test-classes");
String subPath = "compiled";
Path destDir = Paths.get(System.getProperty("test.classes"), subPath);
CompilerUtils.compile(sourceDir, destDir);
String bootCP = "-Xbootclasspath/a:" + destDir.toString();
String className = "Hello";
// try to load a class itself directly, i.e. not via a symlink
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
bootCP, className);
// make sure it runs as expected
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldContain("Hello World")
.shouldHaveExitValue(0);
// create a symlink to the classfile in a subdir with a given name
Path classFile = Path.of(destDir + File.separator + className + ".class");
final String subdir = "remote";
final String pathToFolderForSymlink = destDir + File.separator + subdir + File.separator;
createLinkInSeparateFolder(pathToFolderForSymlink, classFile, className);
// try to load class via its symlink, which is in a different directory
pb = ProcessTools.createLimitedTestJavaProcessBuilder(
bootCP + File.separator + subdir, className);
output = new OutputAnalyzer(pb.start());
output.shouldContain("Hello World")
.shouldHaveExitValue(0);
// remove the subdir
FileUtils.deleteFileTreeWithRetry(Path.of(pathToFolderForSymlink));
}
public static void createLinkInSeparateFolder(final String pathToFolderForSymlink, final Path target, final String className) throws IOException {
File theDir = new File(pathToFolderForSymlink);
if (!theDir.exists()) {
theDir.mkdirs();
}
Path link = Paths.get(pathToFolderForSymlink, className + ".class");
if (Files.exists(link)) {
Files.delete(link);
}
try {
Files.createSymbolicLink(link, target);
} catch (UnsupportedOperationException uoe) {
throw new SkipException("Symbolic link creation not supported.", uoe);
} catch (IOException ioe) {
throw new SkipException("Probably insufficient privileges to create symbolic links (Windows)", ioe);
}
}
}