--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/runtime/NMT/SummarySanityCheck.java	Sat Feb 02 16:34:10 2013 +0100
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @key nmt jcmd
+ * @summary Sanity check the output of NMT
+ * @library /testlibrary
+ * @run compile -J-XX:+UnlockDiagnosticVMOptions -J-XX:+WhiteBoxAPI SummarySanityCheck.java
+ * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:NativeMemoryTracking=summary -XX:+WhiteBoxAPI SummarySanityCheck
+ */
+
+import com.oracle.java.testlibrary.*;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import sun.hotspot.WhiteBox;
+
+public class SummarySanityCheck {
+
+  private static String jcmdout;
+  public static void main(String args[]) throws Exception {
+    // Grab my own PID
+    String pid = Integer.toString(ProcessTools.getProcessId());
+
+    // Use WB API to ensure that all data has been merged before we continue
+    if (!WhiteBox.getWhiteBox().NMTWaitForDataMerge()) {
+      throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
+    }
+
+    ProcessBuilder pb = new ProcessBuilder();
+
+    // Run  'jcmd <pid> VM.native_memory summary scale=KB'
+    pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary", "scale=KB"});
+    OutputAnalyzer output = new OutputAnalyzer(pb.start());
+
+    jcmdout = output.getOutput();
+    // Split by '-' to get the 'groups'
+    String[] lines = jcmdout.split("\n");
+
+    if (lines.length == 0) {
+      throwTestException("Failed to parse jcmd output");
+    }
+
+    int totalCommitted = 0, totalReserved = 0;
+    int totalCommittedSum = 0, totalReservedSum = 0;
+
+    // Match '- <mtType> (reserved=<reserved>KB, committed=<committed>KB)
+    Pattern mtTypePattern = Pattern.compile("-\\s+(?<typename>[\\w\\s]+)\\(reserved=(?<reserved>\\d+)KB,\\scommitted=(?<committed>\\d+)KB\\)");
+    // Match 'Total: reserved=<reserved>KB, committed=<committed>KB'
+    Pattern totalMemoryPattern = Pattern.compile("Total\\:\\s\\sreserved=(?<reserved>\\d+)KB,\\s\\scommitted=(?<committed>\\d+)KB");
+
+    for (int i = 0; i < lines.length; i++) {
+      if (lines[i].startsWith("Total")) {
+        Matcher totalMemoryMatcher = totalMemoryPattern.matcher(lines[i]);
+
+        if (totalMemoryMatcher.matches() && totalMemoryMatcher.groupCount() == 2) {
+          totalCommitted = Integer.parseInt(totalMemoryMatcher.group("committed"));
+          totalReserved = Integer.parseInt(totalMemoryMatcher.group("reserved"));
+        } else {
+          throwTestException("Failed to match the expected groups in 'Total' memory part");
+        }
+      } else if (lines[i].startsWith("-")) {
+        Matcher typeMatcher = mtTypePattern.matcher(lines[i]);
+        if (typeMatcher.matches()) {
+          int typeCommitted = Integer.parseInt(typeMatcher.group("committed"));
+          int typeReserved = Integer.parseInt(typeMatcher.group("reserved"));
+
+          // Make sure reserved is always less or equals
+          if (typeCommitted > typeReserved) {
+            throwTestException("Committed (" + typeCommitted + ") was more than Reserved ("
+                + typeReserved + ") for mtType: " + typeMatcher.group("typename"));
+          }
+
+          // Add to total and compare them in the end
+          totalCommittedSum += typeCommitted;
+          totalReservedSum += typeReserved;
+        } else {
+          throwTestException("Failed to match the group on line " + i);
+        }
+      }
+    }
+
+    // See if they add up correctly, rounding is a problem so make sure we're within +/- 8KB
+    int committedDiff = totalCommitted - totalCommittedSum;
+    if (committedDiff > 8 || committedDiff < -8) {
+      throwTestException("Total committed (" + totalCommitted + ") did not match the summarized committed (" + totalCommittedSum + ")" );
+    }
+
+    int reservedDiff = totalReserved - totalReservedSum;
+    if (reservedDiff > 8 || reservedDiff < -8) {
+      throwTestException("Total reserved (" + totalReserved + ") did not match the summarized reserved (" + totalReservedSum + ")" );
+    }
+  }
+
+  private static void throwTestException(String reason) throws Exception {
+      throw new Exception(reason + " . Stdout is :\n" + jcmdout);
+  }
+}