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 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 jdkDebug = System.getProperty("jdk.debug");
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 (jdkDebug.toLowerCase().contains("debug"));
117 }
118
119 public static String getVMVersion() {
120 return vmVersion;
121 }
122
123 // Returns true for sparc and sparcv9.
124 public static boolean isSparc() {
125 return isArch("sparc.*");
126 }
127
128 public static boolean isARM() {
129 return isArch("arm.*");
130 }
131
132 public static boolean isPPC() {
133 return isArch("ppc.*");
134 }
135
136 public static boolean isX86() {
137 // On Linux it's 'i386', Windows 'x86' without '_64' suffix.
138 return isArch("(i386)|(x86(?!_64))");
139 }
140
141 public static boolean isX64() {
142 // On OSX it's 'x86_64' and on other (Linux, Windows and Solaris) platforms it's 'amd64'
143 return isArch("(amd64)|(x86_64)");
144 }
145
146 public static boolean isAArch64() {
147 return isArch("aarch64");
148 }
149
150 public static String getOsArch() {
151 return osArch;
152 }
153
154 /**
155 * Return a boolean for whether we expect to be able to attach
156 * the SA to our own processes on this system.
157 */
158 public static boolean shouldSAAttach() throws Exception {
159
160 if (isAix()) {
161 return false; // SA not implemented.
162 } else if (isLinux()) {
163 return canPtraceAttachLinux();
164 } else if (isOSX()) {
165 return canAttachOSX();
166 } else {
167 // Other platforms expected to work:
168 return true;
169 }
170 }
171
172 /**
173 * On Linux, first check the SELinux boolean "deny_ptrace" and return false
174 * as we expect to be denied if that is "1". Then expect permission to attach
175 * if we are root, so return true. Then return false for an expected denial
176 * if "ptrace_scope" is 1, and true otherwise.
177 */
178 public static boolean canPtraceAttachLinux() throws Exception {
179
180 // SELinux deny_ptrace:
181 String deny_ptrace = Utils.fileAsString("/sys/fs/selinux/booleans/deny_ptrace");
182 if (deny_ptrace != null && deny_ptrace.contains("1")) {
183 // ptrace will be denied:
184 return false;
185 }
186
187 // YAMA enhanced security ptrace_scope:
188 // 0 - a process can PTRACE_ATTACH to any other process running under the same uid
189 // 1 - restricted ptrace: a process must be a children of the inferior or user is root
190 // 2 - only processes with CAP_SYS_PTRACE may use ptrace or user is root
191 // 3 - no attach: no processes may use ptrace with PTRACE_ATTACH
192 String ptrace_scope = Utils.fileAsString("/proc/sys/kernel/yama/ptrace_scope");
193 if (ptrace_scope != null) {
194 if (ptrace_scope.startsWith("3")) {
195 return false;
196 }
197 if (!userName.equals("root") && !ptrace_scope.startsWith("0")) {
198 // ptrace will be denied:
199 return false;
200 }
201 }
202 // Otherwise expect to be permitted:
203 return true;
204 }
205
206 /**
207 * On OSX, expect permission to attach only if we are root.
208 */
209 public static boolean canAttachOSX() throws Exception {
210 return userName.equals("root");
211 }
212
213 private static boolean isArch(String archnameRE) {
214 return Pattern.compile(archnameRE, Pattern.CASE_INSENSITIVE)
215 .matcher(osArch)
216 .matches();
217 }
218 }