1 /*
   2  * Copyright (c) 2000, 2020, 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 
  25 package sun.jvm.hotspot.utilities;
  26 
  27 /** Provides canonicalized OS and CPU information for the rest of the
  28     system. */
  29 
  30 public class PlatformInfo {
  31   /* Returns "win32" if Windows; "linux" if Linux. */
  32   public static String getOS() throws UnsupportedPlatformException {
  33     String os = System.getProperty("os.name");
  34     if (os.equals("Linux")) {
  35       return "linux";
  36     } else if (os.equals("FreeBSD")) {
  37       return "bsd";
  38     } else if (os.equals("NetBSD")) {
  39       return "bsd";
  40     } else if (os.equals("OpenBSD")) {
  41       return "bsd";
  42     } else if (os.contains("Darwin") || os.contains("OS X")) {
  43       return "darwin";
  44     } else if (os.startsWith("Windows")) {
  45       return "win32";
  46     } else {
  47       throw new UnsupportedPlatformException("Operating system " + os + " not yet supported");
  48     }
  49   }
  50 
  51   public static boolean knownCPU(String cpu) {
  52     final String[] KNOWN =
  53         new String[] {"i386", "x86", "x86_64", "amd64", "ppc64", "ppc64le", "aarch64"};
  54 
  55     for(String s : KNOWN) {
  56       if(s.equals(cpu))
  57         return true;
  58     }
  59 
  60     return false;
  61   }
  62 
  63   /* Returns "x86" for x86 based platforms and x86_64 for 64bit x86
  64      based platform. Otherwise returns the value of os.arch. If the
  65      value is not recognized as supported, an exception is thrown
  66      instead. */
  67 
  68   public static String getCPU() throws UnsupportedPlatformException {
  69     String cpu = System.getProperty("os.arch");
  70 
  71     // Check that CPU is supported
  72     if (!knownCPU(cpu)) {
  73        throw new UnsupportedPlatformException("CPU type " + cpu + " not yet supported");
  74     }
  75 
  76     // Tweeks
  77     if (cpu.equals("i386"))
  78       return "x86";
  79 
  80     if (cpu.equals("x86_64"))
  81       return "amd64";
  82 
  83     if (cpu.equals("ppc64le"))
  84       return "ppc64";
  85 
  86     return cpu;
  87 
  88   }
  89 
  90   // this main is invoked from Makefile to make platform specific agent Makefile(s).
  91   public static void main(String[] args) {
  92     System.out.println(getOS());
  93   }
  94 }