1 /*
2 * Copyright (c) 2013, 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.
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.io.File;
27 import java.io.IOException;
28 import java.io.RandomAccessFile;
29 import java.util.regex.Pattern;
30 import java.security.AccessController;
31 import java.security.PrivilegedAction;
32 import java.security.PrivilegedActionException;
33 import java.security.PrivilegedExceptionAction;
34
35 public class Platform {
36 public static final String vmName = privilegedGetProperty("java.vm.name");
37 public static final String vmInfo = privilegedGetProperty("java.vm.info");
38 private static final String osVersion = privilegedGetProperty("os.version");
39 private static int osVersionMajor = -1;
40 private static int osVersionMinor = -1;
41 private static final String osName = privilegedGetProperty("os.name");
42 private static final String dataModel = privilegedGetProperty("sun.arch.data.model");
43 private static final String vmVersion = privilegedGetProperty("java.vm.version");
44 private static final String jdkDebug = privilegedGetProperty("jdk.debug");
45 private static final String osArch = privilegedGetProperty("os.arch");
46 private static final String userName = privilegedGetProperty("user.name");
47 private static final String compiler = privilegedGetProperty("sun.management.compiler");
48
49 private static String privilegedGetProperty(String key) {
50 return AccessController.doPrivileged((
51 PrivilegedAction<String>) () -> System.getProperty(key));
52 }
53
54 public static boolean isClient() {
55 return vmName.endsWith(" Client VM");
56 }
57
58 public static boolean isServer() {
59 return vmName.endsWith(" Server VM");
60 }
61
62 public static boolean isGraal() {
63 return vmName.endsWith(" Graal VM");
64 }
65
66 public static boolean isZero() {
67 return vmName.endsWith(" Zero VM");
68 }
69
70 public static boolean isMinimal() {
71 return vmName.endsWith(" Minimal VM");
72 }
73
74 public static boolean isEmbedded() {
75 return vmName.contains("Embedded");
76 }
77
78 public static boolean isEmulatedClient() {
79 return vmInfo.contains(" emulated-client");
80 }
81
82 public static boolean isTieredSupported() {
83 return compiler.contains("Tiered Compilers");
84 }
85
86 public static boolean isInt() {
87 return vmInfo.contains("interpreted");
88 }
89
90 public static boolean isMixed() {
91 return vmInfo.contains("mixed");
92 }
93
94 public static boolean isComp() {
95 return vmInfo.contains("compiled");
96 }
97
98 public static boolean is32bit() {
99 return dataModel.equals("32");
100 }
101
102 public static boolean is64bit() {
103 return dataModel.equals("64");
104 }
105
106 public static boolean isAix() {
107 return isOs("aix");
108 }
109
110 public static boolean isLinux() {
111 return isOs("linux");
112 }
113
114 public static boolean isOSX() {
115 return isOs("mac");
116 }
117
118 public static boolean isSolaris() {
119 return isOs("sunos");
120 }
121
122 public static boolean isWindows() {
123 return isOs("win");
124 }
125
126 private static boolean isOs(String osname) {
127 return osName.toLowerCase().startsWith(osname.toLowerCase());
128 }
129
130 public static String getOsName() {
131 return osName;
132 }
133
134 // Os version support.
135 private static void init_version() {
136 String[] osVersionTokens = osVersion.split("\\.");
137 try {
138 if (osVersionTokens.length > 0) {
139 osVersionMajor = Integer.parseInt(osVersionTokens[0]);
140 if (osVersionTokens.length > 1) {
141 osVersionMinor = Integer.parseInt(osVersionTokens[1]);
142 }
143 }
144 } catch (NumberFormatException e) {
145 osVersionMajor = osVersionMinor = 0;
146 }
147 }
148
149 public static String getOsVersion() {
150 return osVersion;
151 }
152
153 // Returns major version number from os.version system property.
154 // E.g. 5 on Solaris 10 and 3 on SLES 11.3 (for the linux kernel version).
155 public static int getOsVersionMajor() {
156 if (osVersionMajor == -1) init_version();
157 return osVersionMajor;
158 }
159
160 // Returns minor version number from os.version system property.
161 // E.g. 10 on Solaris 10 and 0 on SLES 11.3 (for the linux kernel version).
162 public static int getOsVersionMinor() {
163 if (osVersionMinor == -1) init_version();
164 return osVersionMinor;
165 }
166
167 public static boolean isDebugBuild() {
168 return (jdkDebug.toLowerCase().contains("debug"));
169 }
170
171 public static boolean isSlowDebugBuild() {
172 return (jdkDebug.toLowerCase().equals("slowdebug"));
173 }
174
175 public static boolean isFastDebugBuild() {
176 return (jdkDebug.toLowerCase().equals("fastdebug"));
177 }
178
179 public static String getVMVersion() {
180 return vmVersion;
181 }
182
183 public static boolean isAArch64() {
184 return isArch("aarch64");
185 }
186
187 public static boolean isARM() {
188 return isArch("arm.*");
189 }
190
191 public static boolean isPPC() {
192 return isArch("ppc.*");
193 }
194
195 // Returns true for IBM z System running linux.
196 public static boolean isS390x() {
197 return isArch("s390.*") || isArch("s/390.*") || isArch("zArch_64");
198 }
199
200 // Returns true for sparc and sparcv9.
201 public static boolean isSparc() {
202 return isArch("sparc.*");
203 }
204
205 public static boolean isX64() {
206 // On OSX it's 'x86_64' and on other (Linux, Windows and Solaris) platforms it's 'amd64'
207 return isArch("(amd64)|(x86_64)");
208 }
209
210 public static boolean isX86() {
211 // On Linux it's 'i386', Windows 'x86' without '_64' suffix.
212 return isArch("(i386)|(x86(?!_64))");
213 }
214
215 public static String getOsArch() {
216 return osArch;
217 }
218
219 /**
220 * Return a boolean for whether SA and jhsdb are ported/available
221 * on this platform.
222 */
223 public static boolean hasSA() {
224 if (isAix()) {
225 return false; // SA not implemented.
226 } else if (isLinux()) {
227 if (isS390x()) {
228 return false; // SA not implemented.
229 }
230 }
231 // Other platforms expected to work:
232 return true;
233 }
234
235 /**
236 * Return a boolean for whether we expect to be able to attach
237 * the SA to our own processes on this system. This requires
238 * that SA is ported/available on this platform.
239 */
240 public static boolean shouldSAAttach() throws IOException {
241 if (!hasSA()) return false;
242 if (isLinux()) {
243 return canPtraceAttachLinux();
244 } else if (isOSX()) {
245 return canAttachOSX();
246 } else {
247 // Other platforms expected to work:
248 return true;
249 }
250 }
251
252 /**
253 * On Linux, first check the SELinux boolean "deny_ptrace" and return false
254 * as we expect to be denied if that is "1". Then expect permission to attach
255 * if we are root, so return true. Then return false for an expected denial
256 * if "ptrace_scope" is 1, and true otherwise.
257 */
258 private static boolean canPtraceAttachLinux() throws IOException {
259 // SELinux deny_ptrace:
260 File deny_ptrace = new File("/sys/fs/selinux/booleans/deny_ptrace");
261 if (deny_ptrace.exists()) {
262 try (RandomAccessFile file = AccessController.doPrivileged(
263 (PrivilegedExceptionAction<RandomAccessFile>) () -> new RandomAccessFile(deny_ptrace, "r"))) {
264 if (file.readByte() != '0') {
265 return false;
266 }
267 } catch (PrivilegedActionException e) {
268 @SuppressWarnings("unchecked")
269 IOException t = (IOException) e.getException();
270 throw t;
271 }
272 }
273
274 // YAMA enhanced security ptrace_scope:
275 // 0 - a process can PTRACE_ATTACH to any other process running under the same uid
276 // 1 - restricted ptrace: a process must be a children of the inferior or user is root
277 // 2 - only processes with CAP_SYS_PTRACE may use ptrace or user is root
278 // 3 - no attach: no processes may use ptrace with PTRACE_ATTACH
279 File ptrace_scope = new File("/proc/sys/kernel/yama/ptrace_scope");
280 if (ptrace_scope.exists()) {
281 try (RandomAccessFile file = AccessController.doPrivileged(
282 (PrivilegedExceptionAction<RandomAccessFile>) () -> new RandomAccessFile(ptrace_scope, "r"))) {
283 byte yama_scope = file.readByte();
284 if (yama_scope == '3') {
285 return false;
286 }
287
288 if (!userName.equals("root") && yama_scope != '0') {
289 return false;
290 }
291 } catch (PrivilegedActionException e) {
292 @SuppressWarnings("unchecked")
293 IOException t = (IOException) e.getException();
294 throw t;
295 }
296 }
297 // Otherwise expect to be permitted:
298 return true;
299 }
300
301 /**
302 * On OSX, expect permission to attach only if we are root.
303 */
304 private static boolean canAttachOSX() {
305 return userName.equals("root");
306 }
307
308 private static boolean isArch(String archnameRE) {
309 return Pattern.compile(archnameRE, Pattern.CASE_INSENSITIVE)
310 .matcher(osArch)
311 .matches();
312 }
313
314 /**
315 * Returns file extension of shared library, e.g. "so" on linux, "dll" on windows.
316 * @return file extension
317 */
318 public static String sharedLibraryExt() {
319 if (isWindows()) {
320 return "dll";
321 } else if (isOSX()) {
322 return "dylib";
323 } else {
324 return "so";
325 }
326 }
327
328 public static boolean isDefaultCDSArchiveSupported() {
329 return (is64bit() &&
330 isServer() &&
331 (isLinux() ||
332 isOSX() ||
333 isSolaris() ||
334 isWindows()) &&
335 !isZero() &&
336 !isMinimal() &&
337 !isAArch64() &&
338 !isARM());
339 }
340
341 /*
342 * This should match the #if condition in ClassListParser::load_class_from_source().
343 */
344 public static boolean areCustomLoadersSupportedForCDS() {
345 return (is64bit() && (isLinux() || isSolaris() || isOSX()));
346 }
347 }