1 /*
   2  * Copyright (c) 2000, 2015, 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 "solaris" if on Solaris; "win32" if Windows; "linux" if
  32      Linux. Used to determine location of dbx and import module, or
  33      possible debugger agent on win32. */
  34   public static String getOS() throws UnsupportedPlatformException {
  35     String os = System.getProperty("os.name");
  36     if (os.equals("SunOS")) {
  37       return "solaris";
  38     } else if (os.equals("Linux")) {
  39       return "linux";
  40     } else if (os.equals("FreeBSD")) {
  41       return "bsd";
  42     } else if (os.equals("NetBSD")) {
  43       return "bsd";
  44     } else if (os.equals("OpenBSD")) {
  45       return "bsd";
  46     } else if (os.contains("Darwin") || os.contains("OS X")) {
  47       return "darwin";
  48     } else if (os.startsWith("Windows")) {
  49       return "win32";
  50     } else {
  51       throw new UnsupportedPlatformException("Operating system " + os + " not yet supported");
  52     }
  53   }
  54 
  55   public static boolean knownCPU(String cpu) {
  56     final String[] KNOWN =
  57       new String[] {"i386", "x86", "x86_64", "amd64", "sparc", "sparcv9", "ppc64", "ppc64le", "aarch64", "arm"};
  58 
  59     for(String s : KNOWN) {
  60       if(s.equals(cpu))
  61         return true;
  62     }
  63 
  64     return false;
  65   }
  66 
  67   /* Returns "sparc" for SPARC based platforms "x86" for x86 based
  68      platforms and x86_64 for 64bit x86 based platform. Otherwise
  69      returns the value of os.arch. If the value is not recognized as supported,
  70      an exception is thrown instead. */
  71 
  72   public static String getCPU() throws UnsupportedPlatformException {
  73     String cpu = System.getProperty("os.arch");
  74 
  75     // Let any additional CPU mangling fire first
  76     try {
  77       Class pic = Class.forName("sun.jvm.hotspot.utilities.PlatformInfoClosed");
  78       AltPlatformInfo api = (AltPlatformInfo) pic.newInstance();
  79       if (api.knownCPU(cpu)) {
  80         return api.getCPU(cpu);
  81       }
  82     } catch (Exception e) {
  83        // Ignored
  84     }
  85 
  86     // Check that CPU is supported
  87     if (!knownCPU(cpu)) {
  88        throw new UnsupportedPlatformException("CPU type " + cpu + " not yet supported");
  89     }
  90 
  91     // Tweeks
  92     if (cpu.equals("i386"))
  93       return "x86";
  94 
  95     if (cpu.equals("sparcv9"))
  96       return "sparc";
  97 
  98     if (cpu.equals("x86_64"))
  99       return "amd64";
 100 
 101     if (cpu.equals("ppc64le"))
 102       return "ppc64";
 103 
 104     return cpu;
 105 
 106   }
 107 
 108   // this main is invoked from Makefile to make platform specific agent Makefile(s).
 109   public static void main(String[] args) {
 110     System.out.println(getOS());
 111   }
 112 }