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 boolean isSlowDebugBuild() {
 120         return (jdkDebug.toLowerCase().equals("slowdebug"));
 121     }
 122 
 123     public static boolean isFastDebugBuild() {
 124         return (jdkDebug.toLowerCase().equals("fastdebug"));
 125     }
 126 
 127     public static String getVMVersion() {
 128         return vmVersion;
 129     }
 130 
 131     // Returns true for sparc and sparcv9.
 132     public static boolean isSparc() {
 133         return isArch("sparc.*");
 134     }
 135 
 136     public static boolean isARM() {
 137         return isArch("arm.*");
 138     }
 139 
 140     public static boolean isPPC() {
 141         return isArch("ppc.*");
 142     }
 143 
 144     public static boolean isX86() {
 145         // On Linux it's 'i386', Windows 'x86' without '_64' suffix.
 146         return isArch("(i386)|(x86(?!_64))");
 147     }
 148 
 149     public static boolean isX64() {
 150         // On OSX it's 'x86_64' and on other (Linux, Windows and Solaris) platforms it's 'amd64'
 151         return isArch("(amd64)|(x86_64)");
 152     }
 153 
 154     public static boolean isAArch64() {
 155         return isArch("aarch64");
 156     }
 157 
 158     public static String getOsArch() {
 159         return osArch;
 160     }
 161 
 162     /**
 163      * Return a boolean for whether we expect to be able to attach
 164      * the SA to our own processes on this system.
 165      */
 166     public static boolean shouldSAAttach() throws Exception {
 167 
 168         if (isAix()) {
 169             return false;   // SA not implemented.
 170         } else if (isLinux()) {
 171             return canPtraceAttachLinux();
 172         } else if (isOSX()) {
 173             return canAttachOSX();
 174         } else {
 175             // Other platforms expected to work:
 176             return true;
 177         }
 178     }
 179 
 180     /**
 181      * On Linux, first check the SELinux boolean "deny_ptrace" and return false
 182      * as we expect to be denied if that is "1".  Then expect permission to attach
 183      * if we are root, so return true.  Then return false for an expected denial
 184      * if "ptrace_scope" is 1, and true otherwise.
 185      */
 186     public static boolean canPtraceAttachLinux() throws Exception {
 187 
 188         // SELinux deny_ptrace:
 189         String deny_ptrace = Utils.fileAsString("/sys/fs/selinux/booleans/deny_ptrace");
 190         if (deny_ptrace != null && deny_ptrace.contains("1")) {
 191             // ptrace will be denied:
 192             return false;
 193         }
 194 
 195         // YAMA enhanced security ptrace_scope:
 196         // 0 - a process can PTRACE_ATTACH to any other process running under the same uid
 197         // 1 - restricted ptrace: a process must be a children of the inferior or user is root
 198         // 2 - only processes with CAP_SYS_PTRACE may use ptrace or user is root
 199         // 3 - no attach: no processes may use ptrace with PTRACE_ATTACH
 200         String ptrace_scope = Utils.fileAsString("/proc/sys/kernel/yama/ptrace_scope");
 201         if (ptrace_scope != null) {
 202             if (ptrace_scope.startsWith("3")) {
 203                 return false;
 204             }
 205             if (!userName.equals("root") && !ptrace_scope.startsWith("0")) {
 206                 // ptrace will be denied:
 207                 return false;
 208             }
 209         }
 210         // Otherwise expect to be permitted:
 211         return true;
 212     }
 213 
 214     /**
 215      * On OSX, expect permission to attach only if we are root.
 216      */
 217     public static boolean canAttachOSX() throws Exception {
 218         return userName.equals("root");
 219     }
 220 
 221     private static boolean isArch(String archnameRE) {
 222         return Pattern.compile(archnameRE, Pattern.CASE_INSENSITIVE)
 223                       .matcher(osArch)
 224                       .matches();
 225     }
 226 }