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