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:+UseCerealGC", // Should be ignored.
65 "-XX:Flags=" + flagsFile.getAbsolutePath(),
66 "-cp", System.getProperty("test.class.path"),
67 "CheckOrigin",
68 "-runtests");
69
70 Map<String, String> env = pb.environment();
71 // "UseCMSGC" should be ignored.
72 env.put("_JAVA_OPTIONS", "-XX:+PrintOopAddress -XX:+UseCMSGC");
73 // "UseGOneGC" should be ignored.
74 env.put("JAVA_TOOL_OPTIONS", "-XX:+IgnoreUnrecognizedVMOptions "
75 + "-XX:+PrintVMOptions -XX:+UseGOneGC");
76
77 pb.redirectOutput(ProcessBuilder.Redirect.INHERIT);
78 pb.redirectError(ProcessBuilder.Redirect.INHERIT);
79 Process p = pb.start();
80 int exit = p.waitFor();
81 System.out.println("sub process exit == " + exit);
82 if (exit != 0) {
83 throw new Exception("Unexpected exit code from subprocess == " + exit);
84 }
85 } else {
86 mbean =
87 ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);
88
89 // set a few more options
90 mbean.setVMOption("HeapDumpOnOutOfMemoryError", "true");
91 setOptionUsingAttach("HeapDumpPath", "/a/sample/path");
92
93 // check the origin field for all the options we set
94
95 // Not set, so should be default
96 checkOrigin("ManagementServer", Origin.DEFAULT);
97 // Set on the command line
98 checkOrigin("PrintGCDetails", Origin.VM_CREATION);
99 // Set in _JAVA_OPTIONS
100 checkOrigin("PrintOopAddress", Origin.ENVIRON_VAR);
101 // Set in JAVA_TOOL_OPTIONS
102 checkOrigin("IgnoreUnrecognizedVMOptions", Origin.ENVIRON_VAR);
103 checkOrigin("PrintVMOptions", Origin.ENVIRON_VAR);
104 // Set in -XX:Flags file
105 checkOrigin("PrintSafepointStatistics", Origin.CONFIG_FILE);
106 // Set through j.l.m
107 checkOrigin("HeapDumpOnOutOfMemoryError", Origin.MANAGEMENT);
108 // Should be set by the VM, when we set UseConcMarkSweepGC
109 checkOrigin("UseParNewGC", Origin.ERGONOMIC);
110 // Set using attach
111 checkOrigin("HeapDumpPath", Origin.ATTACH_ON_DEMAND);
112 }
113 }
114
115 private static void checkOrigin(String option, Origin origin) throws Exception
116 {
117 Origin o = mbean.getVMOption(option).getOrigin();
118 if (!o.equals(origin)) {
119 throw new Exception("Option '" + option + "' should have origin '" + origin + "' but had '" + o + "'");
120 }
121 System.out.println("Option '" + option + "' verified origin = '" + origin + "'");
122 }
123
124 // use attach to set a manageable vm option
125 private static void setOptionUsingAttach(String option, String value) throws Exception {
126 HotSpotVirtualMachine vm = (HotSpotVirtualMachine) VirtualMachine.attach(ProcessTools.getProcessId()+"");
127 InputStream in = vm.setFlag(option, value);
128 System.out.println("Result from setting '" + option + "' to '" + value + "' using attach:");
129 drain(vm, in);
130 System.out.println("-- end -- ");
131 }
132
133 // Read the stream from the target VM until EOF, print to output, then detach
134 private static void drain(VirtualMachine vm, InputStream in) throws Exception {
135 byte b[] = new byte[256];
136 int n;
137 do {
138 n = in.read(b);
139 if (n > 0) {
140 String s = new String(b, 0, n, "UTF-8");
141 System.out.print(s);
142 }
143 } while (n > 0);
144 in.close();
145 vm.detach();
146 }
147
148 }