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. */
getOS()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("DragonFly") || os.equals("DragonFlyBSD") ) {
37       return "bsd";
38     } else if (os.equals("FreeBSD")) {
39       return "bsd";
40     } else if (os.equals("NetBSD")) {
41       return "bsd";
42     } else if (os.equals("OpenBSD")) {
43       return "bsd";
44     } else if (os.contains("Darwin") || os.contains("OS X")) {
45       return "darwin";
46     } else if (os.startsWith("Windows")) {
47       return "win32";
48     } else {
49       throw new UnsupportedPlatformException("Operating system " + os + " not yet supported");
50     }
51   }
52 
knownCPU(String cpu)53   public static boolean knownCPU(String cpu) {
54     final String[] KNOWN =
55         new String[] {"i386", "x86", "x86_64", "amd64", "ppc64", "ppc64le", "aarch64"};
56 
57     for(String s : KNOWN) {
58       if(s.equals(cpu))
59         return true;
60     }
61 
62     return false;
63   }
64 
65   /* Returns "x86" for x86 based platforms and x86_64 for 64bit x86
66      based platform. Otherwise returns the value of os.arch. If the
67      value is not recognized as supported, an exception is thrown
68      instead. */
69 
getCPU()70   public static String getCPU() throws UnsupportedPlatformException {
71     String cpu = System.getProperty("os.arch");
72 
73     // Check that CPU is supported
74     if (!knownCPU(cpu)) {
75        throw new UnsupportedPlatformException("CPU type " + cpu + " not yet supported");
76     }
77 
78     // Tweeks
79     if (cpu.equals("i386"))
80       return "x86";
81 
82     if (cpu.equals("x86_64"))
83       return "amd64";
84 
85     if (cpu.equals("ppc64le"))
86       return "ppc64";
87 
88     return cpu;
89 
90   }
91 
92   // this main is invoked from Makefile to make platform specific agent Makefile(s).
main(String[] args)93   public static void main(String[] args) {
94     System.out.println(getOS());
95   }
96 }
97