src/java.base/aix/classes/jdk/internal/loader/ClassLoaderHelper.java - master - githubmirror/galahad

src/java.base/aix/classes/jdk/internal/loader/ClassLoaderHelper.java

76 строк3 KB

Suchismith Roy

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

17 апр 2024, 20:03

17 апр 2024, 20:034895a15

/*
 * 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()]);
    }
}