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 package jdk.testlibrary;
25 import java.util.regex.Pattern;
26 import java.io.RandomAccessFile;
27 import java.io.FileNotFoundException;
28 import java.io.IOException;
29
30 /**
31 * @deprecated This class is deprecated. Use the one from
32 * {@code <root>/test/lib/share/classes/jdk/test/lib}
33 */
34 @Deprecated
35 public class Platform {
36 private static final String osName = System.getProperty("os.name");
37 private static final String dataModel = System.getProperty("sun.arch.data.model");
38 private static final String vmVersion = System.getProperty("java.vm.version");
39 private static final String jdkDebug = System.getProperty("jdk.debug");
40 private static final String osArch = System.getProperty("os.arch");
41 private static final String vmName = System.getProperty("java.vm.name");
42 private static final String userName = System.getProperty("user.name");
43 private static final String compiler = System.getProperty("sun.management.compiler");
44
45 public static boolean isClient() {
46 return vmName.endsWith(" Client VM");
47 }
48
49 public static boolean isServer() {
50 return vmName.endsWith(" Server VM");
51 }
52
53 public static boolean isGraal() {
54 return vmName.endsWith(" Graal VM");
55 }
56
57 public static boolean isMinimal() {
58 return vmName.endsWith(" Minimal VM");
59 }
60
61 public static boolean isEmbedded() {
62 return vmName.contains("Embedded");
63 }
64
65 public static boolean isTieredSupported() {
66 return compiler.contains("Tiered Compilers");
67 }
68
69
70 public static boolean is32bit() {
71 return dataModel.equals("32");
72 }
73
74 public static boolean is64bit() {
75 return dataModel.equals("64");
76 }
77
78 public static boolean isAix() {
79 return isOs("aix");
80 }
81
82 public static boolean isLinux() {
83 return isOs("linux");
84 }
85
86 public static boolean isOSX() {
87 return isOs("mac");
88 }
89
90 public static boolean isSolaris() {
91 return isOs("sunos");
92 }
93
94 public static boolean isWindows() {
95 return isOs("win");
96 }
97
98 private static boolean isOs(String osname) {
99 return osName.toLowerCase().startsWith(osname.toLowerCase());
100 }
101
102 public static String getOsName() {
103 return osName;
104 }
105
106 public static boolean isDebugBuild() {
107 return (jdkDebug.toLowerCase().contains("debug"));
108 }
109
110 public static String getVMVersion() {
111 return vmVersion;
112 }
113
114 // Returns true for sparc and sparcv9.
115 public static boolean isSparc() {
116 return isArch("sparc.*");
117 }
118
119 public static boolean isARM() {
120 return isArch("arm.*");
121 }
122
123 public static boolean isPPC() {
124 return isArch("ppc.*");
125 }
126
127 public static boolean isX86() {
128 // On Linux it's 'i386', Windows 'x86' without '_64' suffix.
129 return isArch("(i386)|(x86(?!_64))");
130 }
131
132 public static boolean isX64() {
133 // On OSX it's 'x86_64' and on other (Linux, Windows and Solaris) platforms it's 'amd64'
134 return isArch("(amd64)|(x86_64)");
135 }
136
137 private static boolean isArch(String archnameRE) {
138 return Pattern.compile(archnameRE, Pattern.CASE_INSENSITIVE)
139 .matcher(osArch)
140 .matches();
141 }
142
143 public static String getOsArch() {
144 return osArch;
145 }
146
147 /**
148 * Return a boolean for whether we expect to be able to attach
149 * the SA to our own processes on this system.
150 */
151 public static boolean shouldSAAttach()
152 throws IOException {
153
154 if (isAix()) {
155 return false; // SA not implemented.
156 } else if (isLinux()) {
157 return canPtraceAttachLinux();
158 } else if (isOSX()) {
159 return canAttachOSX();
160 } else {
161 // Other platforms expected to work:
162 return true;
163 }
164 }
165
166 /**
167 * On Linux, first check the SELinux boolean "deny_ptrace" and return false
168 * as we expect to be denied if that is "1".
169 */
170 public static boolean canPtraceAttachLinux()
171 throws IOException {
172
173 // SELinux deny_ptrace:
174 try(RandomAccessFile file = new RandomAccessFile("/sys/fs/selinux/booleans/deny_ptrace", "r")) {
175 if (file.readByte() != '0') {
176 return false;
177 }
178 }
179 catch(FileNotFoundException ex) {
180 // Ignored
181 }
182
183 // YAMA enhanced security ptrace_scope:
184 // 0 - a process can PTRACE_ATTACH to any other process running under the same uid
185 // 1 - restricted ptrace: a process must be a children of the inferior or user is root
186 // 2 - only processes with CAP_SYS_PTRACE may use ptrace or user is root
187 // 3 - no attach: no processes may use ptrace with PTRACE_ATTACH
188
189 try(RandomAccessFile file = new RandomAccessFile("/proc/sys/kernel/yama/ptrace_scope", "r")) {
190 byte yama_scope = file.readByte();
191 if (yama_scope == '3') {
192 return false;
193 }
194
195 if (!userName.equals("root") && yama_scope != '0') {
196 return false;
197 }
198 }
199 catch(FileNotFoundException ex) {
200 // Ignored
201 }
202
203 // Otherwise expect to be permitted:
204 return true;
205 }
206
207 /**
208 * On OSX, expect permission to attach only if we are root.
209 */
210 public static boolean canAttachOSX() {
211 return userName.equals("root");
212 }
213 }