1 /*
2 * Copyright (c) 2005, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package jdk.internal.vm;
26
27 import java.io.ByteArrayOutputStream;
28 import java.io.IOException;
29 import java.util.Properties;
30 import java.util.Set;
31 import java.util.jar.JarFile;
32 import java.util.jar.Manifest;
33 import java.util.jar.Attributes;
34
35 /*
36 * Support class used by JVMTI and VM attach mechanism.
37 */
38 public class VMSupport {
39
40 private static Properties agentProps = null;
41 /**
42 * Returns the agent properties.
43 */
44 public static synchronized Properties getAgentProperties() {
45 if (agentProps == null) {
46 agentProps = new Properties();
47 initAgentProperties(agentProps);
48 }
90 if (man != null) {
91 if (man.getMainAttributes().getValue(Attributes.Name.CLASS_PATH) != null) {
92 return true;
93 }
94 }
95 return false;
96 } catch (IOException ioe) {
97 throw new RuntimeException(ioe.getMessage());
98 }
99 }
100
101 /*
102 * Return the temporary directory that the VM uses for the attach
103 * and perf data files.
104 *
105 * It is important that this directory is well-known and the
106 * same for all VM instances. It cannot be affected by configuration
107 * variables such as java.io.tmpdir.
108 */
109 public static native String getVMTemporaryDirectory();
110 }
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1 /*
2 * Copyright (c) 2005, 2018 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package jdk.internal.vm;
26
27 import java.io.ByteArrayOutputStream;
28 import java.io.IOException;
29 import java.io.File;
30 import java.util.Properties;
31 import java.util.Set;
32 import java.util.jar.JarFile;
33 import java.util.jar.Manifest;
34 import java.util.jar.Attributes;
35
36 /*
37 * Support class used by JVMTI and VM attach mechanism.
38 */
39 public class VMSupport {
40
41 private static Properties agentProps = null;
42 /**
43 * Returns the agent properties.
44 */
45 public static synchronized Properties getAgentProperties() {
46 if (agentProps == null) {
47 agentProps = new Properties();
48 initAgentProperties(agentProps);
49 }
91 if (man != null) {
92 if (man.getMainAttributes().getValue(Attributes.Name.CLASS_PATH) != null) {
93 return true;
94 }
95 }
96 return false;
97 } catch (IOException ioe) {
98 throw new RuntimeException(ioe.getMessage());
99 }
100 }
101
102 /*
103 * Return the temporary directory that the VM uses for the attach
104 * and perf data files.
105 *
106 * It is important that this directory is well-known and the
107 * same for all VM instances. It cannot be affected by configuration
108 * variables such as java.io.tmpdir.
109 */
110 public static native String getVMTemporaryDirectory();
111
112 /*
113 * Return a list of the temporary directories that the VM uses for
114 * the attach and perf data files.
115 *
116 * This method returns the traditional host temp directory but also
117 * includes a list of temp directories used by containers.
118 *
119 * It is important that the returned directories are well-known and the
120 * same for all VM instances. It cannot be affected by configuration
121 * variables such as java.io.tmpdir.
122 */
123 public static String[] getVMTemporaryDirectories(int vmid) {
124 return VMSupportImpl.getTemporaryDirectories(vmid);
125 }
126
127 /*
128 * Extract the host PID from a file path.
129 */
130 public static int getLocalVmId(File file) throws NumberFormatException {
131 return VMSupportImpl.getLocalVmId(file);
132 }
133
134 /*
135 * Return the inner most namespaced PID if there is one,
136 * otherwise return the original PID.
137 */
138 public static int getNamespaceVmId(int pid) {
139 return VMSupportImpl.getNamespaceVmId(pid);
140 }
141 }
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