--- /dev/null	2019-06-25 12:30:59.515000214 +0900
+++ new/test/hotspot/jtreg/serviceability/sa/sadebugd/DebugdUtils.java	2019-06-25 16:43:43.275564548 +0900
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 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.
+ *
+ * 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.
+ */
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.IOException;
+
+import jdk.test.lib.JDKToolLauncher;
+
+
+public class DebugdUtils {
+
+    private static final String GOLDEN = "Debugger attached";
+
+    private final String id;
+
+    private Process debugdProcess;
+
+    public DebugdUtils(String id) {
+        this.id = id;
+        debugdProcess = null;
+    }
+
+    public void attach(long pid) throws IOException {
+        JDKToolLauncher jhsdbLauncher = JDKToolLauncher.createUsingTestJDK("jhsdb");
+        jhsdbLauncher.addToolArg("debugd");
+        jhsdbLauncher.addToolArg("--pid");
+        jhsdbLauncher.addToolArg(Long.toString(pid));
+        if (id != null) {
+            jhsdbLauncher.addToolArg("--serverid");
+            jhsdbLauncher.addToolArg(id);
+        }
+        debugdProcess = (new ProcessBuilder(jhsdbLauncher.getCommand())).start();
+
+        // Wait until debug server attached
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(debugdProcess.getErrorStream()))) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                if (line.contains(GOLDEN)) {
+                    break;
+                }
+            }
+        }
+    }
+
+    public void detach() throws InterruptedException {
+        if (debugdProcess != null) {
+            debugdProcess.destroy();
+            debugdProcess.waitFor();
+        }
+    }
+}