1 /*
   2  * Copyright (c) 2013, 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  * @summary Test detail memory comparison against early baseline 
  27  * @key nmt jcmd
  28  * @library /testlibrary /testlibrary/whitebox
  29  * @build JcmdDiffCallsite
  30  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  31  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail JcmdDiffCallsite
  32  */
  33 
  34 import com.oracle.java.testlibrary.*;
  35 import sun.hotspot.WhiteBox;
  36 
  37 public class JcmdDiffCallsite {
  38 
  39   public static void main(String args[]) throws Exception {
  40     OutputAnalyzer output;
  41     WhiteBox wb = WhiteBox.getWhiteBox();
  42 
  43     // Grab my own PID
  44     String pid = Integer.toString(ProcessTools.getProcessId());
  45     ProcessBuilder pb = new ProcessBuilder();
  46 
  47     // Use WB API to alloc and free with the mtTest type
  48     long memAlloc1 = wb.NMTMalloc(512 * 1024);
  49 
  50     // Use WB API to ensure that all data has been merged before we continue
  51     if (!wb.NMTWaitForDataMerge()) {
  52       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
  53     }
  54 
  55     // Run 'jcmd <pid> VM.native_memory baseline'
  56     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "baseline"});
  57     pb.start();
  58 
  59     wb.NMTFree(memAlloc1);
  60     // Use WB API to ensure that all data has been merged before we continue
  61     if (!wb.NMTWaitForDataMerge()) {
  62       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
  63     }
  64 
  65     // Run 'jcmd <pid> VM.native_memory detail.diff'
  66     pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail.diff"}); 
  67     output = new OutputAnalyzer(pb.start());
  68 
  69 
  70     // Use WB API to ensure that all data has been merged before we continue
  71     if (!wb.NMTWaitForDataMerge()) {
  72       throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
  73     }
  74 
  75     // above malloc callsite should report 0
  76     output = new OutputAnalyzer(pb.start());
  77     output.shouldContain("(malloc=0");
  78   }
  79 }