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8319516: AIX System::loadLibrary needs support to load a shared library from an archive object

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Reviewed-by: mdoerr, mchung
This commit is contained in:
Suchismith Roy 2024-04-17 17:03:40 +00:00 committed by Martin Doerr
parent fd331ff173
commit 4895a15a77
2 changed files with 149 additions and 0 deletions
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77
src/java.base/aix/classes/jdk/internal/loader/ClassLoaderHelper.java Normal file
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/*
* Copyright (c) 2024, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
package jdk.internal.loader;
import java.io.File;
import java.util.ArrayList;
class ClassLoaderHelper {
private ClassLoaderHelper() {}
/**
* Shared objects may be loaded from .a archive object on AIX and .so may not exist.
* This method returns false so that loading of shared library continues if
* libname.so is not present.
*/
static boolean loadLibraryOnlyIfPresent() {
return false;
}
/**
* AIX implementation of JVM_LoadLibrary handles the alternate path name mapping.
* If loading of the given library name with ".so" suffix fails, it will attempt
* to load the library of the same name with ".a" suffix as the alternate name.
* This method simply returns null. It could implement the alternate name
* converting ".so" with ".a" suffix but redundant.
*/
static File mapAlternativeName(File lib) {
return null;
}
/**
* Parse a PATH env variable.
*
* Empty elements will be replaced by dot.
*/
static String[] parsePath(String ldPath) {
char ps = File.pathSeparatorChar;
ArrayList<String> paths = new ArrayList<>();
int pathStart = 0;
int pathEnd;
while ((pathEnd = ldPath.indexOf(ps, pathStart)) >= 0) {
paths.add((pathStart < pathEnd) ?
ldPath.substring(pathStart, pathEnd) : ".");
pathStart = pathEnd + 1;
}
int ldLen = ldPath.length();
paths.add((pathStart < ldLen) ?
ldPath.substring(pathStart, ldLen) : ".");
return paths.toArray(new String[paths.size()]);
}
}

72
test/jdk/java/lang/RuntimeTests/loadLibrary/aix/LoadAIXLibraryFromArchiveObject.java Normal file
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/*
* Copyright (c) 2024, IBM Corporation. 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.nio.file.Files;
import java.nio.file.Path;
import jdk.test.lib.process.ProcessTools;
/**
* @test
* @bug 8319516
* @summary verify that System.loadLibrary on AIX is able to load libraries from ".a" (archive) file
* @requires os.family == "aix"
* @library /test/lib/
* @build jdk.test.lib.process.ProcessTools
* @run main/othervm LoadAIXLibraryFromArchiveObject
*/
public class LoadAIXLibraryFromArchiveObject {
private static final String TEST_LIBRARY_NAME = "foobar";
// creates a ".a" archive file in a test specific directory and then
// launches a java application passing this directory through "-Djava.library.path".
// the java application then attempts to load the library using System.loadLibrary()
public static void main(String[] args) throws Exception {
String javaHome = System.getProperty("java.home");
Path libj2pcscSo = Path.of(javaHome).resolve("lib", "libj2pcsc.so");
if (!Files.exists(libj2pcscSo)) {
throw new AssertionError(libj2pcscSo + " is missing");
}
String archiveFileName = "lib" + TEST_LIBRARY_NAME + ".a";
// copy over libj2pcsc.so as an archive file to test specific scratch dir
Path testNativeLibDir = Path.of("native").toAbsolutePath();
Files.createDirectories(testNativeLibDir);
Path libFooBarArchive = testNativeLibDir.resolve(archiveFileName);
Files.copy(libj2pcscSo, libFooBarArchive);
// launch a java application which calls System.loadLibrary and is passed
// the directory containing the native library archive file, through
// -Djava.library.path
ProcessBuilder processBuilder = ProcessTools.createTestJavaProcessBuilder(
"-Djava.library.path=" + testNativeLibDir,
LoadAIXLibraryFromArchiveObject.LoadLibraryApp.class.getName());
ProcessTools.executeCommand(processBuilder).shouldHaveExitValue(0);
}
static class LoadLibraryApp {
public static void main(final String[] args) throws Exception {
System.out.println("attempting to load library " + TEST_LIBRARY_NAME);
System.loadLibrary(TEST_LIBRARY_NAME);
System.out.println(TEST_LIBRARY_NAME + " successfully loaded");
}
}
}