1 /*
2 * Copyright (c) 2013, 2016, 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 "--add-exports", "jdk.attach/sun.tools.attach=ALL-UNNAMED",
65 "-XX:+UseConcMarkSweepGC", // this will cause UseParNewGC to be FLAG_SET_ERGO
66 "-XX:+UseCodeAging",
67 "-XX:+UseCerealGC", // Should be ignored.
68 "-XX:Flags=" + flagsFile.getAbsolutePath(),
69 "-cp", System.getProperty("test.class.path"),
70 "CheckOrigin",
71 "-runtests");
72
73 Map<String, String> env = pb.environment();
74 // "UseCMSGC" should be ignored.
75 env.put("_JAVA_OPTIONS", "-XX:+CheckJNICalls -XX:+UseCMSGC");
76 // "UseGOneGC" should be ignored.
77 env.put("JAVA_TOOL_OPTIONS", "-XX:+IgnoreUnrecognizedVMOptions "
78 + "-XX:+PrintVMOptions -XX:+UseGOneGC");
79
80 pb.redirectOutput(ProcessBuilder.Redirect.INHERIT);
81 pb.redirectError(ProcessBuilder.Redirect.INHERIT);
82 Process p = pb.start();
83 int exit = p.waitFor();
84 System.out.println("sub process exit == " + exit);
85 if (exit != 0) {
86 throw new Exception("Unexpected exit code from subprocess == " + exit);
87 }
88 } else {
89 mbean =
90 ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class);
91
92 // set a few more options
93 mbean.setVMOption("HeapDumpOnOutOfMemoryError", "true");
94 setOptionUsingAttach("HeapDumpPath", "/a/sample/path");
95
96 // check the origin field for all the options we set
97
98 // Not set, so should be default
99 checkOrigin("ManagementServer", Origin.DEFAULT);
100 // Set on the command line
101 checkOrigin("UseCodeAging", Origin.VM_CREATION);
102 // Set in _JAVA_OPTIONS
103 checkOrigin("CheckJNICalls", Origin.ENVIRON_VAR);
104 // Set in JAVA_TOOL_OPTIONS
105 checkOrigin("IgnoreUnrecognizedVMOptions", Origin.ENVIRON_VAR);
106 checkOrigin("PrintVMOptions", Origin.ENVIRON_VAR);
107 // Set in -XX:Flags file
108 checkOrigin("PrintSafepointStatistics", Origin.CONFIG_FILE);
109 // Set through j.l.m
110 checkOrigin("HeapDumpOnOutOfMemoryError", Origin.MANAGEMENT);
111 // Should be set by the VM, when we set UseConcMarkSweepGC
112 checkOrigin("UseParNewGC", Origin.ERGONOMIC);
113 // Set using attach
114 checkOrigin("HeapDumpPath", Origin.ATTACH_ON_DEMAND);
115 }
116 }
117
118 private static void checkOrigin(String option, Origin origin) throws Exception
119 {
120 Origin o = mbean.getVMOption(option).getOrigin();
121 if (!o.equals(origin)) {
122 throw new Exception("Option '" + option + "' should have origin '" + origin + "' but had '" + o + "'");
123 }
124 System.out.println("Option '" + option + "' verified origin = '" + origin + "'");
125 }
126
127 // use attach to set a manageable vm option
128 private static void setOptionUsingAttach(String option, String value) throws Exception {
129 HotSpotVirtualMachine vm = (HotSpotVirtualMachine) VirtualMachine.attach(ProcessTools.getProcessId()+"");
130 InputStream in = vm.setFlag(option, value);
131 System.out.println("Result from setting '" + option + "' to '" + value + "' using attach:");
132 drain(vm, in);
133 System.out.println("-- end -- ");
134 }
135
136 // Read the stream from the target VM until EOF, print to output, then detach
137 private static void drain(VirtualMachine vm, InputStream in) throws Exception {
138 byte b[] = new byte[256];
139 int n;
140 do {
141 n = in.read(b);
142 if (n > 0) {
143 String s = new String(b, 0, n, "UTF-8");
144 System.out.print(s);
145 }
146 } while (n > 0);
147 in.close();
148 vm.detach();
149 }
150
151 }