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.test.lib;
25
26 import java.util.regex.Pattern;
27
28 public class Platform {
29 public static final String vmName = System.getProperty("java.vm.name");
30 public static final String vmInfo = System.getProperty("java.vm.info");
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 userName = System.getProperty("user.name");
37 private static final String compiler = System.getProperty("sun.management.compiler");
38
39 public static boolean isClient() {
40 return vmName.endsWith(" Client VM");
41 }
42
43 public static boolean isServer() {
44 return vmName.endsWith(" Server VM");
45 }
46
47 public static boolean isGraal() {
48 return vmName.endsWith(" Graal VM");
49 }
50
51 public static boolean isZero() {
52 return vmName.endsWith(" Zero VM");
53 }
54
55 public static boolean isMinimal() {
56 return vmName.endsWith(" Minimal VM");
57 }
58
59 public static boolean isEmbedded() {
60 return vmName.contains("Embedded");
61 }
62
63 public static boolean isTieredSupported() {
64 return compiler.contains("Tiered Compilers");
65 }
66
67 public static boolean isInt() {
68 return vmInfo.contains("interpreted");
69 }
70
71 public static boolean isMixed() {
72 return vmInfo.contains("mixed");
73 }
74
75 public static boolean isComp() {
76 return vmInfo.contains("compiled");
77 }
78
79 public static boolean is32bit() {
80 return dataModel.equals("32");
81 }
82
83 public static boolean is64bit() {
84 return dataModel.equals("64");
85 }
86
87 public static boolean isAix() {
88 return isOs("aix");
89 }
90
91 public static boolean isLinux() {
92 return isOs("linux");
93 }
94
95 public static boolean isOSX() {
96 return isOs("mac");
97 }
98
99 public static boolean isSolaris() {
100 return isOs("sunos");
101 }
102
103 public static boolean isWindows() {
104 return isOs("win");
105 }
106
107 private static boolean isOs(String osname) {
108 return osName.toLowerCase().startsWith(osname.toLowerCase());
109 }
110
111 public static String getOsName() {
112 return osName;
113 }
114
115 public static boolean isDebugBuild() {
116 return (vmVersion.toLowerCase().contains("debug") ||
117 javaVersion.toLowerCase().contains("debug"));
118 }
119
120 public static String getVMVersion() {
121 return vmVersion;
122 }
123
124 // Returns true for sparc and sparcv9.
125 public static boolean isSparc() {
126 return isArch("sparc.*");
127 }
128
129 public static boolean isARM() {
130 return isArch("arm.*");
131 }
132
133 public static boolean isPPC() {
134 return isArch("ppc.*");
135 }
136
137 public static boolean isX86() {
138 // On Linux it's 'i386', Windows 'x86' without '_64' suffix.
139 return isArch("(i386)|(x86(?!_64))");
140 }
141
142 public static boolean isX64() {
143 // On OSX it's 'x86_64' and on other (Linux, Windows and Solaris) platforms it's 'amd64'
144 return isArch("(amd64)|(x86_64)");
145 }
146
147 public static boolean isAArch64() {
148 return isArch("aarch64");
149 }
150
151 public static String getOsArch() {
152 return osArch;
153 }
154
155 /**
156 * Return a boolean for whether we expect to be able to attach
157 * the SA to our own processes on this system.
158 */
159 public static boolean shouldSAAttach() throws Exception {
160
161 if (isAix()) {
162 return false; // SA not implemented.
163 } else if (isLinux()) {
164 return canPtraceAttachLinux();
165 } else if (isOSX()) {
166 return canAttachOSX();
167 } else {
168 // Other platforms expected to work:
169 return true;
170 }
171 }
172
173 /**
174 * On Linux, first check the SELinux boolean "deny_ptrace" and return false
175 * as we expect to be denied if that is "1". Then expect permission to attach
176 * if we are root, so return true. Then return false for an expected denial
177 * if "ptrace_scope" is 1, and true otherwise.
178 */
179 public static boolean canPtraceAttachLinux() throws Exception {
180
181 // SELinux deny_ptrace:
182 String deny_ptrace = Utils.fileAsString("/sys/fs/selinux/booleans/deny_ptrace");
183 if (deny_ptrace != null && deny_ptrace.contains("1")) {
184 // ptrace will be denied:
185 return false;
186 }
187
188 // YAMA enhanced security ptrace_scope:
189 // 0 - a process can PTRACE_ATTACH to any other process running under the same uid
190 // 1 - restricted ptrace: a process must be a children of the inferior or user is root
191 // 2 - only processes with CAP_SYS_PTRACE may use ptrace or user is root
192 // 3 - no attach: no processes may use ptrace with PTRACE_ATTACH
193 String ptrace_scope = Utils.fileAsString("/proc/sys/kernel/yama/ptrace_scope");
194 if (ptrace_scope != null) {
195 if (ptrace_scope.startsWith("3")) {
196 return false;
197 }
198 if (!userName.equals("root") && !ptrace_scope.startsWith("0")) {
199 // ptrace will be denied:
200 return false;
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() throws Exception {
211 return userName.equals("root");
212 }
213
214 private static boolean isArch(String archnameRE) {
215 return Pattern.compile(archnameRE, Pattern.CASE_INSENSITIVE)
216 .matcher(osArch)
217 .matches();
218 }
219 }