| /* |
| * Copyright (c) 2015, 2015, 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. |
| */ |
| package org.graalvm.compiler.test; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * Utility methods for spawning a VM in a subprocess during unit tests. |
| */ |
| public final class SubprocessUtil { |
| |
| private SubprocessUtil() { |
| } |
| |
| /** |
| * Gets the command line for the current process. |
| * |
| * @return the command line arguments for the current process or {@code null} if they are not |
| * available |
| */ |
| public static List<String> getProcessCommandLine() { |
| String processArgsFile = System.getenv().get("MX_SUBPROCESS_COMMAND_FILE"); |
| if (processArgsFile != null) { |
| try { |
| return Files.readAllLines(new File(processArgsFile).toPath()); |
| } catch (IOException e) { |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Gets the command line used to start the current Java VM, including all VM arguments, but not |
| * including the main class or any Java arguments. This can be used to spawn an identical VM, |
| * but running different Java code. |
| */ |
| public static List<String> getVMCommandLine() { |
| List<String> args = getProcessCommandLine(); |
| if (args == null) { |
| return null; |
| } else { |
| int index = findMainClassIndex(args); |
| return args.subList(0, index); |
| } |
| } |
| |
| public static final List<String> JVM_OPTIONS_WITH_ONE_ARG = System.getProperty("java.specification.version").compareTo("1.9") < 0 ? // |
| Arrays.asList("-cp", "-classpath") : // |
| Arrays.asList("-cp", "-classpath", "-mp", "-modulepath", "-upgrademodulepath", "-addmods", "-m", "-limitmods"); |
| |
| private static int findMainClassIndex(List<String> commandLine) { |
| int i = 1; // Skip the java executable |
| |
| while (i < commandLine.size()) { |
| String s = commandLine.get(i); |
| if (s.charAt(0) != '-') { |
| return i; |
| } else if (JVM_OPTIONS_WITH_ONE_ARG.contains(s)) { |
| i += 2; |
| } else { |
| i++; |
| } |
| } |
| throw new InternalError(); |
| } |
| |
| } |