--- /dev/null	2018-06-17 23:18:20.806999507 +0800
+++ new/test/jdk/jfr/event/runtime/TestSizeTFlags.java	2019-01-29 11:04:35.463925340 +0800
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2015, 2019, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+package jdk.jfr.event.runtime;
+
+import static jdk.testlibrary.Asserts.assertTrue;
+
+import java.nio.file.Paths;
+import java.time.Duration;
+
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.testlibrary.jfr.EventNames;
+import jdk.testlibrary.jfr.Events;
+
+/*
+ * @test
+ * @bug 8058552
+ * @requires vm.gc == "G1" | vm.gc == null
+ * @key jfr
+ * @summary Test checks that flags of type size_t are being sent to the jfr
+ * @library /lib/testlibrary
+ * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps -XX:+UseG1GC -XX:+UseTLAB -XX:MinTLABSize=3k -XX:OldSize=30m -XX:YoungPLABSize=3k -XX:MaxDirectMemorySize=5M  jdk.jfr.event.runtime.TestSizeTFlags
+ */
+public class TestSizeTFlags {
+    private static final String EVENT_NAME = EventNames.UnsignedLongFlag;
+    private static final int NUMBER_OF_FLAGS_TO_CHECK = 4;
+    private static final long MIN_TLAB_SIZE_FLAG_VALUE = 3*1024L;
+    private static final long OLD_SIZE_FLAG_VALUE = 30*1024*1024L;
+    private static final long YOUNG_PLAB_SIZE_FLAG_VALUE = 3*1024L;
+    private static final long MAX_DIRECT_MEMORY_SIZE_FLAG_VALUE = 5*1024*1024L;
+
+    // Test run java with some of the flags of type size_t.
+    // Goals are
+    //  - to check that flags are reported to the jfr;
+    //  - to make sure values are as expected.
+    public static void main(String[] args) throws Exception {
+        final boolean[] flagsFoundWithExpectedValue = new boolean[NUMBER_OF_FLAGS_TO_CHECK];
+        Recording recording = null;
+        try {
+            recording = new Recording();
+            recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0));
+            recording.start();
+            recording.stop();
+
+            for (final RecordedEvent event : Events.fromRecording(recording)) {
+                final String recordedFlagName = Events.assertField(event, "name").getValue();
+                final long value = Events.assertField(event, "value").getValue();
+                switch (recordedFlagName) {
+                    case "MinTLABSize": {
+                        flagsFoundWithExpectedValue[0] = MIN_TLAB_SIZE_FLAG_VALUE == value;
+                        continue;
+                    }
+                    case "OldSize": {
+                        flagsFoundWithExpectedValue[1] = OLD_SIZE_FLAG_VALUE == value;
+                        continue;
+                    }
+                    case "YoungPLABSize": {
+                        flagsFoundWithExpectedValue[2] = YOUNG_PLAB_SIZE_FLAG_VALUE == value;
+                        continue;
+                    }
+                    case "MaxDirectMemorySize": {
+                        flagsFoundWithExpectedValue[3] = MAX_DIRECT_MEMORY_SIZE_FLAG_VALUE == value;
+                        continue;
+                    }
+                    default: {
+                        continue;
+                    }
+                }
+            }
+
+            for (int i = 0; i < flagsFoundWithExpectedValue.length; ++i) {
+                assertTrue(flagsFoundWithExpectedValue[i], "Flag not found or value error!");
+            }
+
+        } catch (Throwable e) {
+            if (recording != null) {
+                recording.dump(Paths.get("failed.jfr"));
+            }
+            throw e;
+        } finally {
+            if (recording != null) {
+                recording.close();
+            }
+        }
+    }
+}