1 /* 2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package com.oracle.java.testlibrary; 25 26 import java.io.ByteArrayOutputStream; 27 import java.io.IOException; 28 import java.lang.management.ManagementFactory; 29 import java.lang.management.RuntimeMXBean; 30 import java.lang.reflect.Field; 31 import java.lang.reflect.Method; 32 import java.util.ArrayList; 33 import java.util.Collections; 34 35 import sun.management.VMManagement; 36 37 public final class ProcessTools { 38 39 private ProcessTools() { 40 } 41 42 /** 43 * Pumps stdout and stderr from running the process into a String. 44 * 45 * @param processHandler ProcessHandler to run. 46 * @return Output from process. 47 * @throws IOException If an I/O error occurs. 48 */ 49 public static OutputBuffer getOutput(ProcessBuilder processBuilder) throws IOException { 50 return getOutput(processBuilder.start()); 51 } 52 53 /** 54 * Pumps stdout and stderr the running process into a String. 55 * 56 * @param process Process to pump. 57 * @return Output from process. 58 * @throws IOException If an I/O error occurs. 59 */ 60 public static OutputBuffer getOutput(Process process) throws IOException { 61 ByteArrayOutputStream stderrBuffer = new ByteArrayOutputStream(); 62 ByteArrayOutputStream stdoutBuffer = new ByteArrayOutputStream(); 63 StreamPumper outPumper = new StreamPumper(process.getInputStream(), stdoutBuffer); 64 StreamPumper errPumper = new StreamPumper(process.getErrorStream(), stderrBuffer); 65 Thread outPumperThread = new Thread(outPumper); 66 Thread errPumperThread = new Thread(errPumper); 67 68 outPumperThread.setDaemon(true); 69 errPumperThread.setDaemon(true); 70 71 outPumperThread.start(); 72 errPumperThread.start(); 73 74 try { 75 process.waitFor(); 76 outPumperThread.join(); 77 errPumperThread.join(); 78 } catch (InterruptedException e) { 79 Thread.currentThread().interrupt(); 80 return null; 81 } 82 83 return new OutputBuffer(stdoutBuffer.toString(), stderrBuffer.toString()); 84 } 85 86 /** 87 * Get the process id of the current running Java process 88 * 89 * @return Process id 90 */ 91 public static int getProcessId() throws Exception { 92 93 // Get the current process id using a reflection hack 94 RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean(); 95 Field jvm = runtime.getClass().getDeclaredField("jvm"); 96 97 jvm.setAccessible(true); 98 VMManagement mgmt = (sun.management.VMManagement) jvm.get(runtime); 99 100 Method pid_method = mgmt.getClass().getDeclaredMethod("getProcessId"); 101 102 pid_method.setAccessible(true); 103 104 int pid = (Integer) pid_method.invoke(mgmt); 105 106 return pid; 107 } 108 109 /** 110 * Get platform specific VM arguments (e.g. -d64 on 64bit Solaris) 111 * 112 * @return String[] with platform specific arguments, empty if there are none 113 */ 114 public static String[] getPlatformSpecificVMArgs() { 115 String osName = System.getProperty("os.name"); 116 String dataModel = System.getProperty("sun.arch.data.model"); 117 118 if (osName.equals("SunOS") && dataModel.equals("64")) { 119 return new String[] { "-d64" }; 120 } 121 122 return new String[] {}; 123 } 124 125 /** 126 * Create ProcessBuilder using the java launcher from the jdk to be tested and 127 * with any platform specific arguments prepended 128 */ 129 public static ProcessBuilder createJavaProcessBuilder(String... command) throws Exception { 130 String javapath = JDKToolFinder.getJDKTool("java"); 131 132 ArrayList<String> args = new ArrayList<>(); 133 args.add(javapath); 134 Collections.addAll(args, getPlatformSpecificVMArgs()); 135 Collections.addAll(args, command); 136 137 return new ProcessBuilder(args.toArray(new String[args.size()])); 138 139 } 140 141 }