8027371: Add JDI tests for breakpointing and stepping in lambda code

Reviewed-by: mchung, sspitsyn

test/com/sun/jdi/LambdaBreakpointTest.java

+/*
+ * 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.
+ */
+
+/********** LINE NUMBER SENSITIVE! *****************************************************************/
+
+/**
+ *  @test
+ *  @summary Test setting breakpoints on lambda calls
+ *
+ *  @author Staffan Larsen
+ *
+ *  @run build TestScaffold VMConnection TargetListener TargetAdapter
+ *  @run compile -g LambdaBreakpointTest.java
+ *  @run main LambdaBreakpointTest
+ */
+import java.util.List;
+
+import com.sun.jdi.LocalVariable;
+import com.sun.jdi.Location;
+import com.sun.jdi.Method;
+import com.sun.jdi.ObjectReference;
+import com.sun.jdi.ReferenceType;
+import com.sun.jdi.StackFrame;
+import com.sun.jdi.StringReference;
+import com.sun.jdi.ThreadReference;
+import com.sun.jdi.event.BreakpointEvent;
+import com.sun.jdi.event.StepEvent;
+
+ /********** target program **********/
+
+class LambdaBreakpointTestTarg {
+
+    static int[] breakpointLines = {
+            62, 66, 63, 64, 65, 67
+    };
+
+    public static void main(String[] args) {
+        test();
+    }
+
+    private static void test() {
+        Runnable r = () -> {                          // B1: L62
+            String from = "lambda";                   // B3: L63
+            System.out.println("Hello from " + from); // B4: L64
+        };                                            // B5: L65
+        r.run();                                      // B2: L66
+        System.out.println("Goodbye.");               // B6: L67
+    }
+}
+
+
+ /********** test program **********/
+
+public class LambdaBreakpointTest extends TestScaffold {
+
+    LambdaBreakpointTest (String args[]) {
+        super(args);
+    }
+
+    public static void main(String[] args)
+        throws Exception
+    {
+        new LambdaBreakpointTest (args).startTests();
+    }
+
+    /********** test core **********/
+
+    protected void runTests()
+        throws Exception
+    {
+        startToMain("LambdaBreakpointTestTarg");
+
+        // Put a breakpoint on each location in the order they should happen
+        for (int line : LambdaBreakpointTestTarg.breakpointLines) {
+            System.out.println("Running to line: " + line);
+            BreakpointEvent be = resumeTo("LambdaBreakpointTestTarg", line);
+            int stoppedAt = be.location().lineNumber();
+            System.out.println("Stopped at line: " + stoppedAt);
+            if (stoppedAt != line) {
+                throw new Exception("Stopped on the wrong line: "
+                        + stoppedAt + " != " + line);
+            }
+        }
+
+        /*
+         * resume the target listening for events
+         */
+        listenUntilVMDisconnect();
+    }
+}

test/com/sun/jdi/LambdaStepTest.java

+/*
+ * 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
+ *  @summary Test stepping through lambdas
+ *
+ *  @author Staffan Larsen
+ *
+ *  @run build TestScaffold VMConnection TargetListener TargetAdapter
+ *  @run compile -g LambdaStepTest.java
+ *  @run main LambdaStepTest
+ */
+import com.sun.jdi.LocalVariable;
+import com.sun.jdi.ObjectReference;
+import com.sun.jdi.ReferenceType;
+import com.sun.jdi.StackFrame;
+import com.sun.jdi.StringReference;
+import com.sun.jdi.ThreadReference;
+import com.sun.jdi.event.BreakpointEvent;
+import com.sun.jdi.event.StepEvent;
+
+ /********** target program **********/
+
+interface DefaultTest {
+    default void defaultMethod() {
+        String from = "default";
+        System.out.println("Hello from " + from);
+    }
+}
+class LambdaStepTestTarg implements DefaultTest {
+    private void test() {
+        String from = "test";
+        System.out.println("Hello from " + from);
+    }
+    private static void instanceTest() {
+        LambdaStepTestTarg l = new LambdaStepTestTarg();
+        l.test();
+    }
+    private static void lambdaTest() {
+        Runnable r = () -> {
+            String from = "lambda";
+            System.out.println("Hello from " + from);
+        };
+        r.run();
+    }
+    private static void defaultTest() {
+        LambdaStepTestTarg l = new LambdaStepTestTarg();
+        l.defaultMethod();
+    }
+    public static void main(String[] args) {
+        instanceTest();
+        lambdaTest();
+        defaultTest();
+        System.out.println("Goodbye from LambdaStepTestTarg!");
+    }
+}
+
+
+ /********** test program **********/
+
+public class LambdaStepTest extends TestScaffold {
+    LambdaStepTest (String args[]) {
+        super(args);
+    }
+
+    public static void main(String[] args)
+        throws Exception
+    {
+        new LambdaStepTest (args).startTests();
+    }
+
+    /********** test core **********/
+
+    protected void runTests()
+        throws Exception
+    {
+        // ## Normal instance method
+
+        BreakpointEvent bpe = startTo("LambdaStepTestTarg", "instanceTest", "()V");
+        ThreadReference thread = bpe.thread();
+
+        // step over allocation
+        StepEvent se = stepOverLine(thread);
+        System.out.println(se.thread().frame(0));
+
+        // step into test();
+        se = stepIntoLine(thread);
+        System.out.println(se.thread().frame(0));
+
+        // step over variable initialization
+        se = stepOverLine(thread);
+        System.out.println(se.thread().frame(0));
+
+        // get value of variable "from"
+        StackFrame frame = se.thread().frame(0);
+        LocalVariable lv = frame.visibleVariableByName("from");
+        System.out.println(lv);
+        StringReference sr = (StringReference) frame.getValue(lv);
+        if (!sr.value().equals("test")) {
+            throw new Exception("Unexpected variable value in instanceTest: "+sr.value());
+        }
+
+
+        // ## Lambda method
+
+        bpe = resumeTo("LambdaStepTestTarg", "lambdaTest", "()V");
+        thread = bpe.thread();
+
+        // step over allocation
+        se = stepOverLine(thread);
+        System.out.println(se.thread().frame(0));
+
+        // step into run() of the lambda
+        se = stepIntoLine(thread);
+        System.out.println(se.thread().frame(0));
+
+        // step over variable initialization
+        se = stepOverLine(thread);
+        System.out.println(se.thread().frame(0));
+
+        // get value of variable "from"
+        frame = se.thread().frame(0);
+        lv = frame.visibleVariableByName("from");
+        System.out.println(lv);
+        sr = (StringReference) frame.getValue(lv);
+        if (!sr.value().equals("lambda")) {
+            throw new Exception("Unexpected variable value in lambdaTest: "+sr.value());
+        }
+
+
+        // ## Default method
+
+        bpe = resumeTo("LambdaStepTestTarg", "defaultTest", "()V");
+        thread = bpe.thread();
+
+        // step over allocation
+        se = stepOverLine(thread);
+        System.out.println(se.thread().frame(0));
+
+        // step into defaultMethod()
+        se = stepIntoLine(thread);
+        System.out.println(se.thread().frame(0));
+
+        // step over variable initialization
+        se = stepOverLine(thread);
+        System.out.println(se.thread().frame(0));
+
+        // get value of variable "from"
+        frame = se.thread().frame(0);
+        lv = frame.visibleVariableByName("from");
+        System.out.println(lv);
+        sr = (StringReference) frame.getValue(lv);
+        if (!sr.value().equals("default")) {
+            throw new Exception("Unexpected variable value in lambdaTest: "+sr.value());
+        }
+
+
+        /*
+         * resume the target listening for events
+         */
+        listenUntilVMDisconnect();
+
+    }
+}