1 /*
   2  * Copyright (c) 2014, 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  * @test
  26  * @bug 8054836
  27  * @summary Test to verify correctness of malloc tracking
  28  * @key nmt jcmd
  29  * @library /testlibrary /testlibrary/whitebox
  30  * @ignore 8058251 
  31  * @build MallocTrackingVerify
  32  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  33  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocTrackingVerify
  34  *
  35  */
  36 
  37 import java.util.ArrayList;
  38 import java.util.Random;
  39 
  40 import com.oracle.java.testlibrary.*;
  41 
  42 import sun.hotspot.WhiteBox;
  43 
  44 public class MallocTrackingVerify {
  45     private static int MAX_ALLOC = 4 * 1024;
  46 
  47     static ArrayList<MallocMemory> mallocd_memory = new ArrayList<MallocMemory>();
  48     static long mallocd_total = 0;
  49     public static WhiteBox wb = WhiteBox.getWhiteBox();
  50 
  51     public static void main(String args[]) throws Exception {
  52         OutputAnalyzer output;
  53 
  54         // Grab my own PID
  55         String pid = Integer.toString(ProcessTools.getProcessId());
  56         ProcessBuilder pb = new ProcessBuilder();
  57 
  58         Random random = new Random();
  59         // Allocate small amounts of memory with random pseudo call stack
  60         while (mallocd_total < MAX_ALLOC) {
  61             int size = random.nextInt(31) + 1;
  62             long addr = wb.NMTMallocWithPseudoStack(size, random.nextInt());
  63             if (addr != 0) {
  64                 MallocMemory mem = new MallocMemory(addr, size);
  65                 mallocd_memory.add(mem);
  66                 mallocd_total += size;
  67             } else {
  68                 System.out.println("Out of malloc memory");
  69                 break;
  70             }
  71         }
  72 
  73         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" });
  74         output = new OutputAnalyzer(pb.start());
  75         output.shouldContain("Test (reserved=4KB, committed=4KB)");
  76 
  77         // Free
  78         for (MallocMemory mem : mallocd_memory) {
  79             wb.NMTFree(mem.addr());
  80         }
  81 
  82         // Run 'jcmd <pid> VM.native_memory summary', check for expected output
  83         pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid,
  84                 "VM.native_memory", "summary" });
  85         output = new OutputAnalyzer(pb.start());
  86         output.shouldNotContain("Test (reserved=");
  87     }
  88 
  89     static class MallocMemory {
  90         private long addr;
  91         private int size;
  92 
  93         MallocMemory(long addr, int size) {
  94             this.addr = addr;
  95             this.size = size;
  96         }
  97 
  98         long addr() {
  99             return this.addr;
 100         }
 101 
 102         int size() {
 103             return this.size;
 104         }
 105     }
 106 }