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. */
getOS()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("DragonFly") || os.equals("DragonFlyBSD") ) {
41       return "bsd";
42     } else if (os.equals("FreeBSD")) {
43       return "bsd";
44     } else if (os.equals("NetBSD")) {
45       return "bsd";
46     } else if (os.equals("OpenBSD")) {
47       return "bsd";
48     } else if (os.contains("Darwin") || os.contains("OS X")) {
49       return "darwin";
50     } else if (os.startsWith("Windows")) {
51       return "win32";
52     } else {
53       throw new UnsupportedPlatformException("Operating system " + os + " not yet supported");
54     }
55   }
56 
knownCPU(String cpu)57   public static boolean knownCPU(String cpu) {
58     final String[] KNOWN =
59         new String[] {"i386", "x86", "x86_64", "amd64", "sparc", "sparcv9", "ppc64", "ppc64le", "aarch64"};
60 
61     for(String s : KNOWN) {
62       if(s.equals(cpu))
63         return true;
64     }
65 
66     return false;
67   }
68 
69   /* Returns "sparc" for SPARC based platforms "x86" for x86 based
70      platforms and x86_64 for 64bit x86 based platform. Otherwise
71      returns the value of os.arch. If the value is not recognized as supported,
72      an exception is thrown instead. */
73 
getCPU()74   public static String getCPU() throws UnsupportedPlatformException {
75     String cpu = System.getProperty("os.arch");
76 
77     // Let any additional CPU mangling fire first
78     try {
79       Class pic = Class.forName("sun.jvm.hotspot.utilities.PlatformInfoClosed");
80       AltPlatformInfo api = (AltPlatformInfo) pic.newInstance();
81       if (api.knownCPU(cpu)) {
82         return api.getCPU(cpu);
83       }
84     } catch (Exception e) {
85        // Ignored
86     }
87 
88     // Check that CPU is supported
89     if (!knownCPU(cpu)) {
90        throw new UnsupportedPlatformException("CPU type " + cpu + " not yet supported");
91     }
92 
93     // Tweeks
94     if (cpu.equals("i386"))
95       return "x86";
96 
97     if (cpu.equals("sparcv9"))
98       return "sparc";
99 
100     if (cpu.equals("x86_64"))
101       return "amd64";
102 
103     if (cpu.equals("ppc64le"))
104       return "ppc64";
105 
106     return cpu;
107 
108   }
109 
110   // this main is invoked from Makefile to make platform specific agent Makefile(s).
main(String[] args)111   public static void main(String[] args) {
112     System.out.println(getOS());
113   }
114 }
115