Platform.java revision 2764:e2a74fa085ea
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 24package jdk.test.lib; 25 26import java.io.File; 27import java.io.IOException; 28import java.io.RandomAccessFile; 29import java.util.regex.Pattern; 30 31public class Platform { 32 public static final String vmName = System.getProperty("java.vm.name"); 33 public static final String vmInfo = System.getProperty("java.vm.info"); 34 private static final String osVersion = System.getProperty("os.version"); 35 private static int osVersionMajor = -1; 36 private static int osVersionMinor = -1; 37 private static final String osName = System.getProperty("os.name"); 38 private static final String dataModel = System.getProperty("sun.arch.data.model"); 39 private static final String vmVersion = System.getProperty("java.vm.version"); 40 private static final String jdkDebug = System.getProperty("jdk.debug"); 41 private static final String osArch = System.getProperty("os.arch"); 42 private static final String userName = System.getProperty("user.name"); 43 private static final String compiler = System.getProperty("sun.management.compiler"); 44 45 public static boolean isClient() { 46 return vmName.endsWith(" Client VM"); 47 } 48 49 public static boolean isServer() { 50 return vmName.endsWith(" Server VM"); 51 } 52 53 public static boolean isGraal() { 54 return vmName.endsWith(" Graal VM"); 55 } 56 57 public static boolean isZero() { 58 return vmName.endsWith(" Zero VM"); 59 } 60 61 public static boolean isMinimal() { 62 return vmName.endsWith(" Minimal VM"); 63 } 64 65 public static boolean isEmbedded() { 66 return vmName.contains("Embedded"); 67 } 68 69 public static boolean isEmulatedClient() { 70 return vmInfo.contains(" emulated-client"); 71 } 72 73 public static boolean isTieredSupported() { 74 return compiler.contains("Tiered Compilers"); 75 } 76 77 public static boolean isInt() { 78 return vmInfo.contains("interpreted"); 79 } 80 81 public static boolean isMixed() { 82 return vmInfo.contains("mixed"); 83 } 84 85 public static boolean isComp() { 86 return vmInfo.contains("compiled"); 87 } 88 89 public static boolean is32bit() { 90 return dataModel.equals("32"); 91 } 92 93 public static boolean is64bit() { 94 return dataModel.equals("64"); 95 } 96 97 public static boolean isAix() { 98 return isOs("aix"); 99 } 100 101 public static boolean isLinux() { 102 return isOs("linux"); 103 } 104 105 public static boolean isOSX() { 106 return isOs("mac"); 107 } 108 109 public static boolean isSolaris() { 110 return isOs("sunos"); 111 } 112 113 public static boolean isWindows() { 114 return isOs("win"); 115 } 116 117 private static boolean isOs(String osname) { 118 return osName.toLowerCase().startsWith(osname.toLowerCase()); 119 } 120 121 public static String getOsName() { 122 return osName; 123 } 124 125 // Os version support. 126 private static void init_version() { 127 try { 128 final String[] tokens = osVersion.split("\\."); 129 if (tokens.length > 0) { 130 osVersionMajor = Integer.parseInt(tokens[0]); 131 if (tokens.length > 1) { 132 osVersionMinor = Integer.parseInt(tokens[1]); 133 } 134 } 135 } catch (NumberFormatException e) { 136 osVersionMajor = osVersionMinor = 0; 137 } 138 } 139 140 // Returns major version number from os.version system property. 141 // E.g. 5 on Solaris 10 and 3 on SLES 11.3 (for the linux kernel version). 142 public static int getOsVersionMajor() { 143 if (osVersionMajor == -1) init_version(); 144 return osVersionMajor; 145 } 146 147 // Returns minor version number from os.version system property. 148 // E.g. 10 on Solaris 10 and 0 on SLES 11.3 (for the linux kernel version). 149 public static int getOsVersionMinor() { 150 if (osVersionMinor == -1) init_version(); 151 return osVersionMinor; 152 } 153 154 public static boolean isDebugBuild() { 155 return (jdkDebug.toLowerCase().contains("debug")); 156 } 157 158 public static boolean isSlowDebugBuild() { 159 return (jdkDebug.toLowerCase().equals("slowdebug")); 160 } 161 162 public static boolean isFastDebugBuild() { 163 return (jdkDebug.toLowerCase().equals("fastdebug")); 164 } 165 166 public static String getVMVersion() { 167 return vmVersion; 168 } 169 170 public static boolean isAArch64() { 171 return isArch("aarch64"); 172 } 173 174 public static boolean isARM() { 175 return isArch("arm.*"); 176 } 177 178 public static boolean isPPC() { 179 return isArch("ppc.*"); 180 } 181 182 // Returns true for IBM z System running linux. 183 public static boolean isS390x() { 184 return isArch("s390.*") || isArch("s/390.*") || isArch("zArch_64"); 185 } 186 187 // Returns true for sparc and sparcv9. 188 public static boolean isSparc() { 189 return isArch("sparc.*"); 190 } 191 192 public static boolean isX64() { 193 // On OSX it's 'x86_64' and on other (Linux, Windows and Solaris) platforms it's 'amd64' 194 return isArch("(amd64)|(x86_64)"); 195 } 196 197 public static boolean isX86() { 198 // On Linux it's 'i386', Windows 'x86' without '_64' suffix. 199 return isArch("(i386)|(x86(?!_64))"); 200 } 201 202 public static String getOsArch() { 203 return osArch; 204 } 205 206 /** 207 * Return a boolean for whether we expect to be able to attach 208 * the SA to our own processes on this system. 209 */ 210 public static boolean shouldSAAttach() throws IOException { 211 if (isAix()) { 212 return false; // SA not implemented. 213 } else if (isLinux()) { 214 if (isS390x()) { 215 return false; // SA not implemented. 216 } 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 private static boolean canPtraceAttachLinux() throws IOException { 233 // SELinux deny_ptrace: 234 File deny_ptrace = new File("/sys/fs/selinux/booleans/deny_ptrace"); 235 if (deny_ptrace.exists()) { 236 try (RandomAccessFile file = new RandomAccessFile(deny_ptrace, "r")) { 237 if (file.readByte() != '0') { 238 return false; 239 } 240 } 241 } 242 243 // YAMA enhanced security ptrace_scope: 244 // 0 - a process can PTRACE_ATTACH to any other process running under the same uid 245 // 1 - restricted ptrace: a process must be a children of the inferior or user is root 246 // 2 - only processes with CAP_SYS_PTRACE may use ptrace or user is root 247 // 3 - no attach: no processes may use ptrace with PTRACE_ATTACH 248 File ptrace_scope = new File("/proc/sys/kernel/yama/ptrace_scope"); 249 if (ptrace_scope.exists()) { 250 try (RandomAccessFile file = new RandomAccessFile(ptrace_scope, "r")) { 251 byte yama_scope = file.readByte(); 252 if (yama_scope == '3') { 253 return false; 254 } 255 256 if (!userName.equals("root") && yama_scope != '0') { 257 return false; 258 } 259 } 260 } 261 // Otherwise expect to be permitted: 262 return true; 263 } 264 265 /** 266 * On OSX, expect permission to attach only if we are root. 267 */ 268 private static boolean canAttachOSX() { 269 return userName.equals("root"); 270 } 271 272 private static boolean isArch(String archnameRE) { 273 return Pattern.compile(archnameRE, Pattern.CASE_INSENSITIVE) 274 .matcher(osArch) 275 .matches(); 276 } 277 278 /** 279 * Returns file extension of shared library, e.g. "so" on linux, "dll" on windows. 280 * @return file extension 281 */ 282 public static String sharedLibraryExt() { 283 if (isWindows()) { 284 return "dll"; 285 } else if (isOSX()) { 286 return "dylib"; 287 } else { 288 return "so"; 289 } 290 } 291} 292