Bug 320277: JUnit test to make sure we properly view variables of base class in derived class

dsf-gdb/org.eclipse.cdt.tests.dsf.gdb/data/launch/src/ExpressionTestApp.cc

@@ -51,6 +51,16 @@ struct childStruct {
 public:
 	Z z;	
 };
+
+// For bug 320277
+class Base {};
+class BaseTest: public Base {
+public:
+  BaseTest() {}
+  void test() { return; }
+};
+// End bug 320277
+
 void locals2() {
 	// Check that we get the content of local variables with 
 	// the same name as the calling method
@@ -300,6 +310,9 @@ int main() {
     testUpdateOfPointer();
     testCanWrite();
     
+    // For bug 320277
+    BaseTest b; b.test();
+    
     return 0;
 }
 

dsf-gdb/org.eclipse.cdt.tests.dsf.gdb/src/org/eclipse/cdt/tests/dsf/gdb/tests/MIExpressionsTest.java

@@ -391,6 +391,58 @@ public class MIExpressionsTest extends BaseTestCase {
         assertTrue(wait.getMessage(), wait.isOK());
     }
     
+    /**
+     * This test makes sure we properly deal with a GDB display bug.
+     * See bug 320277
+     * 
+     * The following code causes a bug in GDB:
+     * 
+     * class Base {};
+     * class BaseTest: public Base {
+     *   public:
+     *     BaseTest() {} // Removing this lines removes GDB's bug
+     *     void test() { return; }
+     * };
+     * 
+     * We see the bug with the following commands:
+     * -var-create - * this
+     * -var-list-children var1
+     * -var-info-path-expression var1.BaseTest
+     * -data-evaluate-expression "(*(Base*) this)"
+     * 
+     * which we can reproduce by creating the children of this
+     * and asking for the DETAILS_FORMAT of the var1.BaseTest child.
+     */
+    @Test
+    public void testBaseChildrenBug() throws Throwable {
+
+        MIStoppedEvent stoppedEvent = SyncUtil.runToLocation("BaseTest::test");
+
+        final IFrameDMContext frameDmc = SyncUtil.getStackFrame(stoppedEvent.getDMContext(), 0);
+
+        final AsyncCompletionWaitor wait = new AsyncCompletionWaitor();
+        
+    	// First we get 'this' and its children
+        final IExpressionDMContext exprDmc = SyncUtil.createExpression(frameDmc, "this");
+	    final IExpressionDMContext[] children = getChildren(exprDmc, new String[] {"Base"});
+
+        fExpService.getExecutor().submit(new Runnable() {
+            public void run() {
+                fExpService.getFormattedExpressionValue(
+                		fExpService.getFormattedValueContext(children[0], MIExpressions.DETAILS_FORMAT),
+                		new DataRequestMonitor<FormattedValueDMData>(fExpService.getExecutor(), null) {
+                			@Override
+                			protected void handleCompleted() {
+               					wait.waitFinished(getStatus());
+                			}
+                		});
+            }
+        });
+
+        wait.waitUntilDone(AsyncCompletionWaitor.WAIT_FOREVER);
+        assertTrue(wait.getMessage(), wait.isOK());
+    }
+
     /**
      * This test verifies that the ExpressionService can write to a variable.
      */