1 /*
   2  * Copyright (c) 2013, 2014, 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 com.oracle.java.testlibrary;
  25 
  26 import java.util.regex.Pattern;
  27 import com.oracle.java.testlibrary.Utils;
  28 
  29 public class Platform {
  30     private static final String osName      = System.getProperty("os.name");
  31     private static final String dataModel   = System.getProperty("sun.arch.data.model");
  32     private static final String vmVersion   = System.getProperty("java.vm.version");
  33     private static final String javaVersion = System.getProperty("java.version");
  34     private static final String osArch      = System.getProperty("os.arch");
  35     private static final String vmName      = System.getProperty("java.vm.name");
  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 isMinimal() {
  52         return vmName.endsWith(" Minimal VM");
  53     }
  54 
  55     public static boolean isEmbedded() {
  56         return vmName.contains("Embedded");
  57     }
  58 
  59     public static boolean isTieredSupported() {
  60         return compiler.contains("Tiered Compilers");
  61     }
  62 
  63     public static boolean is32bit() {
  64         return dataModel.equals("32");
  65     }
  66 
  67     public static boolean is64bit() {
  68         return dataModel.equals("64");
  69     }
  70 
  71     public static boolean isSolaris() {
  72         return isOs("sunos");
  73     }
  74 
  75     public static boolean isWindows() {
  76         return isOs("win");
  77     }
  78 
  79     public static boolean isOSX() {
  80         return isOs("mac");
  81     }
  82 
  83     public static boolean isLinux() {
  84         return isOs("linux");
  85     }
  86 
  87     private static boolean isOs(String osname) {
  88         return osName.toLowerCase().startsWith(osname.toLowerCase());
  89     }
  90 
  91     public static String getOsName() {
  92         return osName;
  93     }
  94 
  95     public static boolean isDebugBuild() {
  96         return (vmVersion.toLowerCase().contains("debug") ||
  97                 javaVersion.toLowerCase().contains("debug"));
  98     }
  99 
 100     public static String getVMVersion() {
 101         return vmVersion;
 102     }
 103 
 104     // Returns true for sparc and sparcv9.
 105     public static boolean isSparc() {
 106         return isArch("sparc.*");
 107     }
 108 
 109     public static boolean isARM() {
 110         return isArch("arm.*");
 111     }
 112 
 113     public static boolean isPPC() {
 114         return isArch("ppc.*");
 115     }
 116 
 117     public static boolean isX86() {
 118         // On Linux it's 'i386', Windows 'x86' without '_64' suffix.
 119         return isArch("(i386)|(x86(?!_64))");
 120     }
 121 
 122     public static boolean isX64() {
 123         // On OSX it's 'x86_64' and on other (Linux, Windows and Solaris) platforms it's 'amd64'
 124         return isArch("(amd64)|(x86_64)");
 125     }
 126 
 127     private static boolean isArch(String archnameRE) {
 128         return Pattern.compile(archnameRE, Pattern.CASE_INSENSITIVE)
 129                 .matcher(osArch)
 130                 .matches();
 131     }
 132 
 133     public static String getOsArch() {
 134         return osArch;
 135     }
 136 
 137     /**
 138      * Return a boolean for whether we expect to be able to attach
 139      * the SA to our own processes on this system.
 140      */
 141     public static boolean shouldSAAttach() throws Exception {
 142 
 143         if (isLinux()) {
 144             return canPtraceAttachLinux();
 145         } else if (isOSX()) {
 146             return canAttachOSX();
 147         } else {
 148             // Other platforms expected to work:
 149             return true;
 150         }
 151     }
 152 
 153     /**
 154      * On Linux, first check the SELinux boolean "deny_ptrace" and return false
 155      * as we expect to be denied if that is "1".  Then expect permission to attach
 156      * if we are root, so return true.  Then return false for an expected denial
 157      * if "ptrace_scope" is 1, and true otherwise.
 158      */
 159     public static boolean canPtraceAttachLinux() throws Exception {
 160 
 161         // SELinux deny_ptrace:
 162         String deny_ptrace = Utils.fileAsString("/sys/fs/selinux/booleans/deny_ptrace");
 163         if (deny_ptrace != null && deny_ptrace.contains("1")) {
 164             // ptrace will be denied:
 165             return false;
 166         }
 167 
 168         if (userName.equals("root")) {
 169             return true;
 170         }
 171 
 172         // ptrace_scope:
 173         String ptrace_scope = Utils.fileAsString("/proc/sys/kernel/yama/ptrace_scope");
 174         if (ptrace_scope != null && ptrace_scope.contains("1")) {
 175             // ptrace will be denied:
 176             return false;
 177         }
 178 
 179         // Otherwise expect to be permitted:
 180         return true;
 181     }
 182 
 183     /**
 184      * On OSX, expect permission to attach only if we are root.
 185      */
 186     public static boolean canAttachOSX() throws Exception {
 187         return userName.equals("root");
 188     }
 189 }