1 /*
   2  * Copyright (c) 2018, 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 import java.foreign.Libraries;
  25 import java.foreign.Library;
  26 import java.foreign.NativeTypes;
  27 import java.foreign.Scope;
  28 import java.foreign.memory.Array;
  29 import java.foreign.memory.Pointer;
  30 import java.lang.invoke.MethodHandles;
  31 import org.testng.annotations.Test;
  32 import test.jextract.lp.libproc;
  33 
  34 import static org.testng.Assert.fail;
  35 
  36 /*
  37  * @test
  38  * @library ..
  39  * @requires (os.family == "mac")
  40  * @run driver JtregJextract -t test.jextract.lp -lproc -rpath /usr/lib -- /usr/include/libproc.h
  41  * @run testng LibprocTest
  42  */
  43 public class LibprocTest {
  44     private static final int NAME_BUF_MAX = 256;
  45 
  46     @Test
  47     public void libprocTest() {
  48         libproc lp = Libraries.bind(MethodHandles.lookup(), libproc.class);
  49 
  50         // Scope for native allocations
  51         try (Scope s = Scope.newNativeScope()) {
  52             // get the number of processes
  53             int numPids = lp.proc_listallpids(Pointer.nullPointer(), 0);
  54             // allocate an array
  55             Array<Integer> pids = s.allocateArray(NativeTypes.INT32, numPids);
  56             // list all the pids into the native array
  57             lp.proc_listallpids(pids.elementPointer(), numPids);
  58             // convert native array to java array
  59             int[] jpids = pids.toArray(num -> new int[num]);
  60             // buffer for process name
  61             Pointer<Byte> nameBuf = s.allocate(NativeTypes.INT8, NAME_BUF_MAX);
  62             for (int i = 0; i < jpids.length; i++) {
  63                 int pid = jpids[i];
  64                 // get the process name
  65                 lp.proc_name(pid, nameBuf, NAME_BUF_MAX);
  66                 String procName = Pointer.toString(nameBuf);
  67                 // print pid and process name
  68                 System.out.printf("%d %s\n", pid, procName);
  69             }
  70         }
  71     }
  72 }