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