8179014: JFileChooser with Windows look and feel crashes on win 10

Reviewed-by: serb, prr

src/windows/native/sun/windows/ShellFolder2.cpp

 /*
- * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2017, 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
@@ -192,14 +192,19 @@ static BOOL initShellProcs()
 static jstring jstringFromSTRRET(JNIEnv* env, LPITEMIDLIST pidl, STRRET* pStrret) {
     switch (pStrret->uType) {
         case STRRET_CSTR :
-            return JNU_NewStringPlatform(env, reinterpret_cast<const char*>(pStrret->cStr));
+            if (pStrret->cStr != NULL) {
+                return JNU_NewStringPlatform(env, reinterpret_cast<const char*>(pStrret->cStr));
+            }
+            break;
         case STRRET_OFFSET :
             // Note : this may need to be WCHAR instead
             return JNU_NewStringPlatform(env,
                                          (CHAR*)pidl + pStrret->uOffset);
         case STRRET_WSTR :
-            return env->NewString(reinterpret_cast<const jchar*>(pStrret->pOleStr),
-                static_cast<jsize>(wcslen(pStrret->pOleStr)));
+            if (pStrret->pOleStr != NULL) {
+                return env->NewString(reinterpret_cast<const jchar*>(pStrret->pOleStr),
+                    static_cast<jsize>(wcslen(pStrret->pOleStr)));
+            }
     }
     return NULL;
 }

test/javax/swing/JFileChooser/GodMode/JFileChooserTest.java

+/*
+ * Copyright (c) 2017, 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
+ * @bug 8179014
+ * @requires (os.family == "Windows")
+ * @summary Check if JFileChooser crashes with GodMode Directory.
+ * @run main/manual JFileChooserTest
+ */
+import java.awt.Color;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.util.concurrent.CountDownLatch;
+import javax.swing.JPanel;
+import javax.swing.JTextArea;
+import javax.swing.SwingUtilities;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.util.concurrent.TimeUnit;
+import javax.swing.JFileChooser;
+import javax.swing.UIManager;
+
+public class JFileChooserTest {
+
+    public static void main(String args[]) throws Exception {
+        final CountDownLatch latch = new CountDownLatch(1);
+        TestUI test = new TestUI(latch);
+        SwingUtilities.invokeAndWait(() -> {
+            try {
+                test.createUI();
+            } catch (Exception ex) {
+                throw new RuntimeException("Exception while creating UI");
+            }
+        });
+
+        boolean status = latch.await(5, TimeUnit.MINUTES);
+
+        if (!status) {
+            System.out.println("Test timed out.");
+        }
+
+        SwingUtilities.invokeAndWait(() -> {
+            try {
+                test.disposeUI();
+            } catch (Exception ex) {
+                throw new RuntimeException("Exception while disposing UI");
+            }
+        });
+
+        if (test.testResult == false) {
+            throw new RuntimeException("Test Failed.");
+        }
+    }
+}
+
+class TestUI {
+
+    private static JFrame mainFrame;
+    private static JPanel mainControlPanel;
+
+    private static JTextArea instructionTextArea;
+
+    private static JPanel resultButtonPanel;
+    private static JButton passButton;
+    private static JButton failButton;
+
+    private static GridBagLayout layout;
+    private final CountDownLatch latch;
+    public boolean testResult = false;
+
+    public TestUI(CountDownLatch latch) throws Exception {
+        this.latch = latch;
+    }
+
+    public final void createUI() throws Exception {
+        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
+        mainFrame = new JFrame("JFileChooserTest");
+
+        layout = new GridBagLayout();
+        mainControlPanel = new JPanel(layout);
+        resultButtonPanel = new JPanel(layout);
+
+        GridBagConstraints gbc = new GridBagConstraints();
+
+        // Create Test instructions
+        String instructions
+                = "INSTRUCTIONS:"
+                + "\n 1. Create a new folder on the desktop."
+                + "\n 2. Rename the folder exactly as given below: "
+                + "\n    GodMode.{ED7BA470-8E54-465E-825C-99712043E01C} "
+                + "\n 3. Click on Launch Button. "
+                + "\n    Check if JFileChooser is launched successfully. "
+                + "\n    If yes, close the JFileChooser and click Pass, "
+                + "\n    else Fail. "
+                + "\n 4. Delete the GodMode folder.";
+
+        instructionTextArea = new JTextArea();
+        instructionTextArea.setText(instructions);
+        instructionTextArea.setEnabled(false);
+        instructionTextArea.setDisabledTextColor(Color.black);
+        instructionTextArea.setBackground(Color.white);
+
+        gbc.gridx = 0;
+        gbc.gridy = 0;
+        gbc.fill = GridBagConstraints.HORIZONTAL;
+        mainControlPanel.add(instructionTextArea, gbc);
+        JButton launchButton = new JButton("Launch");
+        launchButton.setActionCommand("Launch");
+        launchButton.addActionListener((ActionEvent e) -> {
+            JFileChooser fileChooser = new JFileChooser();
+            fileChooser.showOpenDialog(null);
+        }
+        );
+
+        gbc.gridx = 0;
+        gbc.gridy = 1;
+        mainControlPanel.add(launchButton, gbc);
+
+        passButton = new JButton("Pass");
+        passButton.setActionCommand("Pass");
+        passButton.addActionListener((ActionEvent e) -> {
+            testResult = true;
+            mainFrame.dispose();
+            latch.countDown();
+
+        });
+        failButton = new JButton("Fail");
+        failButton.setActionCommand("Fail");
+        failButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                testResult = false;
+                mainFrame.dispose();
+                latch.countDown();
+            }
+        });
+        gbc.gridx = 0;
+        gbc.gridy = 0;
+        resultButtonPanel.add(passButton, gbc);
+        gbc.gridx = 1;
+        gbc.gridy = 0;
+        resultButtonPanel.add(failButton, gbc);
+
+        gbc.gridx = 0;
+        gbc.gridy = 2;
+        mainControlPanel.add(resultButtonPanel, gbc);
+
+        mainFrame.add(mainControlPanel);
+        mainFrame.pack();
+        mainFrame.setVisible(true);
+    }
+
+    public void disposeUI() {
+        mainFrame.setVisible(false);
+        mainFrame.dispose();
+    }
+}