8163269: Testcase missed in push for JDK-8160817

Add missed testcase

Reviewed-by: dsamersoff

hotspot/test/serviceability/sa/sadebugd/SADebugDTest.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2016, 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
+ * @summary Checks that the jshdb debugd utility sucessfully starts
+ *          and tries to attach to a running process
+ * @modules java.base/jdk.internal.misc
+ * @library /test/lib/share/classes
+ *
+ * @run main/othervm SADebugDTest
+ */
+import java.io.File;
+import java.util.concurrent.CountDownLatch;
+import java.io.InputStreamReader;
+import java.io.BufferedReader;
+import java.io.Reader;
+import java.util.concurrent.TimeUnit;
+import java.util.function.Predicate;
+import static jdk.test.lib.Asserts.assertTrue;
+import static jdk.test.lib.Platform.shouldSAAttach;
+import static jdk.test.lib.process.ProcessTools.startProcess;
+
+public class SADebugDTest {
+
+    private static final String GOLDEN = "Attaching to process ID %d and starting RMI services, please wait...";
+
+    private static final String JAVA_HOME = (System.getProperty("test.jdk") != null)
+            ? System.getProperty("test.jdk") : System.getProperty("java.home");
+
+    private static final String JAVA_BIN_DIR
+            = JAVA_HOME + File.separator + "bin" + File.separator;
+
+    private static final String JHSDB = JAVA_BIN_DIR + "jhsdb";
+
+    public static void main(String[] args) throws Exception {
+
+        if (!shouldSAAttach()) {
+            log("Not possible to attach the SA. Skipping the test");
+            return;
+        }
+
+        long ourPid = ProcessHandle.current().getPid();
+
+        // The string we are expecting in the debugd ouput
+        String golden = String.format(GOLDEN, ourPid);
+
+        // We are going to run 'jhsdb debugd <our pid>'
+        // The startProcess will block untl the 'golden' string appears in either process' stdout or stderr
+        // In case of timeout startProcess kills the debugd process
+        ProcessBuilder pb = new ProcessBuilder();
+        pb.command(JHSDB, "debugd", String.valueOf(ourPid));
+        Process debugd = startProcess("debugd", pb, null, (line) -> line.trim().contains(golden), 0, TimeUnit.SECONDS);
+
+        // If we are here, this means we have received the golden line and the test has passed
+        // The debugd remains running, we have to kill it
+        debugd.destroy();
+
+    }
+
+    private static void log(String string) {
+        System.out.println(string);
+    }
+
+}