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 /* 25 * @test 26 * @bug 8028994 27 * @author Staffan Larsen 28 * @library /lib/testlibrary 29 * @build jdk.testlibrary.* 30 * @run main CheckOrigin 31 */ 32 33 import com.sun.management.HotSpotDiagnosticMXBean; 34 import com.sun.management.VMOption; 35 import com.sun.management.VMOption.Origin; 36 import com.sun.tools.attach.VirtualMachine; 37 import java.io.File; 38 import java.io.FileWriter; 39 import java.io.InputStream; 40 import java.io.PrintWriter; 41 import java.lang.management.ManagementFactory; 42 import java.util.Map; 43 import jdk.testlibrary.ProcessTools; 44 import sun.tools.attach.HotSpotVirtualMachine; 45 46 public class CheckOrigin { 47 48 private static HotSpotDiagnosticMXBean mbean; 49 50 public static void main(String... args) throws Exception { 51 if (args.length == 0) { 52 // start a process that has options set in a number of different ways 53 54 File flagsFile = File.createTempFile("CheckOriginFlags", null); 55 try (PrintWriter pw = 56 new PrintWriter(new FileWriter(flagsFile))) { 57 pw.println("+PrintSafepointStatistics"); 58 } 59 60 ProcessBuilder pb = ProcessTools. 61 createJavaProcessBuilder( 62 "-XX:+UseConcMarkSweepGC", // this will cause UseParNewGC to be FLAG_SET_ERGO 63 "-XX:+PrintGCDetails", 64 "-XX:Flags=" + flagsFile.getAbsolutePath(), 65 "-cp", System.getProperty("test.class.path") + File.pathSeparator + getToolsJarPath(), 66 "CheckOrigin", 67 "-runtests"); 68 69 Map<String, String> env = pb.environment(); 70 env.put("_JAVA_OPTIONS", "-XX:+PrintOopAddress"); 71 72 pb.redirectOutput(ProcessBuilder.Redirect.INHERIT); 73 pb.redirectError(ProcessBuilder.Redirect.INHERIT); 74 Process p = pb.start(); 75 int exit = p.waitFor(); 76 System.out.println("sub process exit == " + exit); 77 if (exit != 0) { 78 throw new Exception("Unexpected exit code from subprocess == " + exit); 79 } 80 } else { 81 mbean = 82 ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class); 83 84 // set a few more options 85 mbean.setVMOption("HeapDumpOnOutOfMemoryError", "true"); 86 setOptionUsingAttach("HeapDumpPath", "/a/sample/path"); 87 88 // check the origin field for all the options we set 89 90 // Not set, so should be default 91 checkOrigin("ManagementServer", Origin.DEFAULT); 92 // Set on the command line 93 checkOrigin("PrintGCDetails", Origin.VM_CREATION); 94 // Set in _JAVA_OPTIONS 95 checkOrigin("PrintOopAddress", Origin.ENVIRON_VAR); 96 // Set in -XX:Flags file 97 checkOrigin("PrintSafepointStatistics", Origin.CONFIG_FILE); 98 // Set through j.l.m 99 checkOrigin("HeapDumpOnOutOfMemoryError", Origin.MANAGEMENT); 100 // Should be set by the VM, when we set UseConcMarkSweepGC 101 checkOrigin("UseParNewGC", Origin.ERGONOMIC); 102 // Set using attach 103 checkOrigin("HeapDumpPath", Origin.ATTACH_ON_DEMAND); 104 } 105 } 106 107 private static void checkOrigin(String option, Origin origin) throws Exception 108 { 109 Origin o = mbean.getVMOption(option).getOrigin(); 110 if (!o.equals(origin)) { 111 throw new Exception("Option '" + option + "' should have origin '" + origin + "' but had '" + o + "'"); 112 } 113 System.out.println("Option '" + option + "' verified origin = '" + origin + "'"); 114 } 115 116 // use attach to set a manageable vm option 117 private static void setOptionUsingAttach(String option, String value) throws Exception { 118 HotSpotVirtualMachine vm = (HotSpotVirtualMachine) VirtualMachine.attach(ProcessTools.getProcessId()+""); 119 InputStream in = vm.setFlag(option, value); 120 System.out.println("Result from setting '" + option + "' to '" + value + "' using attach:"); 121 drain(vm, in); 122 System.out.println("-- end -- "); 123 } 124 125 // Read the stream from the target VM until EOF, print to output, then detach 126 private static void drain(VirtualMachine vm, InputStream in) throws Exception { 127 byte b[] = new byte[256]; 128 int n; 129 do { 130 n = in.read(b); 131 if (n > 0) { 132 String s = new String(b, 0, n, "UTF-8"); 133 System.out.print(s); 134 } 135 } while (n > 0); 136 in.close(); 137 vm.detach(); 138 } 139 140 private static String getToolsJarPath() { 141 return System.getProperty("java.home") + 142 "/../lib/tools.jar".replace("/", File.separator); 143 } 144 }