1 /*
2 * Copyright (c) 2013, 2015, 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 * @modules jdk.attach/sun.tools.attach
30 * jdk.management
31 * @build jdk.testlibrary.*
32 * @run main CheckOrigin
33 */
34
35 import com.sun.management.HotSpotDiagnosticMXBean;
36 import com.sun.management.VMOption;
37 import com.sun.management.VMOption.Origin;
38 import com.sun.tools.attach.VirtualMachine;
39 import java.io.File;
40 import java.io.FileWriter;
41 import java.io.InputStream;
42 import java.io.PrintWriter;
43 import java.lang.management.ManagementFactory;
44 import java.util.Map;
45 import jdk.testlibrary.ProcessTools;
46 import sun.tools.attach.HotSpotVirtualMachine;
47
48 public class CheckOrigin {
49
50 private static HotSpotDiagnosticMXBean mbean;
51
52 public static void main(String... args) throws Exception {
53 if (args.length == 0) {
54 // start a process that has options set in a number of different ways
55
56 File flagsFile = File.createTempFile("CheckOriginFlags", null);
57 try (PrintWriter pw =
58 new PrintWriter(new FileWriter(flagsFile))) {
59 pw.println("+PrintSafepointStatistics");
60 }
61
62 ProcessBuilder pb = ProcessTools.
63 createJavaProcessBuilder(
64 "-XX:+UseConcMarkSweepGC", // this will cause UseParNewGC to be FLAG_SET_ERGO
65 "-XX:+PrintGCDetails",
66 "-XX:Flags=" + flagsFile.getAbsolutePath(),
67 "-cp", System.getProperty("test.class.path"),
68 "CheckOrigin",
69 "-runtests");
70
71 Map<String, String> env = pb.environment();
72 env.put("_JAVA_OPTIONS", "-XX:+PrintOopAddress");
73
74 pb.redirectOutput(ProcessBuilder.Redirect.INHERIT);
75 pb.redirectError(ProcessBuilder.Redirect.INHERIT);
76 Process p = pb.start();
77 int exit = p.waitFor();
78 System.out.println("sub process exit == " + exit);
79 if (exit != 0) {
80 throw new Exception("Unexpected exit code from subprocess == " + exit);
81 }
82 } else {
83 mbean =
84 ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);
85
86 // set a few more options
87 mbean.setVMOption("HeapDumpOnOutOfMemoryError", "true");
88 setOptionUsingAttach("HeapDumpPath", "/a/sample/path");
89
90 // check the origin field for all the options we set
91
92 // Not set, so should be default
93 checkOrigin("ManagementServer", Origin.DEFAULT);
94 // Set on the command line
95 checkOrigin("PrintGCDetails", Origin.VM_CREATION);
96 // Set in _JAVA_OPTIONS
97 checkOrigin("PrintOopAddress", Origin.ENVIRON_VAR);
98 // Set in -XX:Flags file
99 checkOrigin("PrintSafepointStatistics", Origin.CONFIG_FILE);
100 // Set through j.l.m
101 checkOrigin("HeapDumpOnOutOfMemoryError", Origin.MANAGEMENT);
102 // Should be set by the VM, when we set UseConcMarkSweepGC
103 checkOrigin("UseParNewGC", Origin.ERGONOMIC);
104 // Set using attach
105 checkOrigin("HeapDumpPath", Origin.ATTACH_ON_DEMAND);
106 }
107 }
108
109 private static void checkOrigin(String option, Origin origin) throws Exception
110 {
111 Origin o = mbean.getVMOption(option).getOrigin();
112 if (!o.equals(origin)) {
113 throw new Exception("Option '" + option + "' should have origin '" + origin + "' but had '" + o + "'");
114 }
115 System.out.println("Option '" + option + "' verified origin = '" + origin + "'");
116 }
117
118 // use attach to set a manageable vm option
119 private static void setOptionUsingAttach(String option, String value) throws Exception {
120 HotSpotVirtualMachine vm = (HotSpotVirtualMachine) VirtualMachine.attach(ProcessTools.getProcessId()+"");
121 InputStream in = vm.setFlag(option, value);
122 System.out.println("Result from setting '" + option + "' to '" + value + "' using attach:");
123 drain(vm, in);
124 System.out.println("-- end -- ");
125 }
126
127 // Read the stream from the target VM until EOF, print to output, then detach
128 private static void drain(VirtualMachine vm, InputStream in) throws Exception {
129 byte b[] = new byte[256];
130 int n;
131 do {
132 n = in.read(b);
133 if (n > 0) {
134 String s = new String(b, 0, n, "UTF-8");
135 System.out.print(s);
136 }
137 } while (n > 0);
138 in.close();
139 vm.detach();
140 }
141
142 }