--- a/langtools/src/share/classes/com/sun/tools/javac/file/JavacFileManager.java	Tue Sep 28 22:46:36 2010 +0530
+++ b/langtools/src/share/classes/com/sun/tools/javac/file/JavacFileManager.java	Wed Sep 29 14:01:37 2010 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2009, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2010, 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
@@ -605,7 +605,7 @@
         nullCheck(className);
         nullCheck(kind);
         if (!sourceOrClass.contains(kind))
-            throw new IllegalArgumentException("Invalid kind " + kind);
+            throw new IllegalArgumentException("Invalid kind: " + kind);
         return getFileForInput(location, RelativeFile.forClass(className, kind));
     }
 
@@ -658,7 +658,7 @@
         nullCheck(className);
         nullCheck(kind);
         if (!sourceOrClass.contains(kind))
-            throw new IllegalArgumentException("Invalid kind " + kind);
+            throw new IllegalArgumentException("Invalid kind: " + kind);
         return getFileForOutput(location, RelativeFile.forClass(className, kind), sibling);
     }
 
@@ -672,7 +672,7 @@
         // validatePackageName(packageName);
         nullCheck(packageName);
         if (!isRelativeUri(relativeName))
-            throw new IllegalArgumentException("relativeName is invalid");
+            throw new IllegalArgumentException("Invalid relative name: " + relativeName);
         RelativeFile name = packageName.length() == 0
             ? new RelativeFile(relativeName)
             : new RelativeFile(RelativeDirectory.forPackage(packageName), relativeName);
@@ -806,6 +806,8 @@
         String path = uri.normalize().getPath();
         if (path.length() == 0 /* isEmpty() is mustang API */)
             return false;
+        if (!path.equals(uri.getPath())) // implicitly checks for embedded . and ..
+            return false;
         char first = path.charAt(0);
         return first != '.' && first != '/';
     }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/processing/filer/TestInvalidRelativeNames.java	Wed Sep 29 14:01:37 2010 -0700
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2010, 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 6502392
+ * @summary Invalid relative names for Filer.createResource and Filer.getResource
+ * @compile TestInvalidRelativeNames.java
+ * @compile/process -processor TestInvalidRelativeNames java.lang.Object
+ */
+
+import java.io.*;
+import java.util.*;
+import javax.annotation.processing.*;
+import javax.lang.model.*;
+import javax.lang.model.element.*;
+import javax.tools.Diagnostic;
+import javax.tools.StandardLocation;
+
+
+@SupportedAnnotationTypes("*")
+public class TestInvalidRelativeNames extends AbstractProcessor {
+    enum Kind { CREATE_WRITER, GET_READER, CREATE_OUTPUT_STREAM, GET_INPUT_STREAM };
+
+    static final String[] invalidRelativeNames = {
+            "/boo", "goo/../hoo", "./ioo", ""
+    };
+
+    @Override
+    public SourceVersion getSupportedSourceVersion() {
+        return SourceVersion.latest();
+    }
+
+    Filer filer;
+    Messager messager;
+
+    @Override
+    public void init(ProcessingEnvironment pEnv) {
+        super.init(pEnv);
+        filer = processingEnv.getFiler();
+        messager = processingEnv.getMessager();
+    }
+
+    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
+        if (roundEnv.processingOver()) {
+            for (String relative: invalidRelativeNames) {
+                for (Kind kind: Kind.values()) {
+                    test(relative, kind);
+                }
+            }
+        }
+        return true;
+    }
+
+    void test(String relative, Kind kind) {
+        System.out.println("test relative path: " + relative + ", kind: " + kind);
+        try {
+            switch (kind) {
+                case CREATE_WRITER:
+                    Writer writer = filer.createResource(
+                            StandardLocation.SOURCE_OUTPUT, "", relative).openWriter();
+                    writer.close();
+                    break;
+
+                case GET_READER:
+                    Reader reader = filer.getResource(
+                            StandardLocation.SOURCE_OUTPUT, "", relative).openReader(true);
+                    reader.close();
+                    break;
+
+                case CREATE_OUTPUT_STREAM:
+                    OutputStream out = filer.createResource(
+                            StandardLocation.SOURCE_OUTPUT, "", relative).openOutputStream();
+                    out.close();
+                    break;
+
+                case GET_INPUT_STREAM:
+                    InputStream in = filer.createResource(
+                            StandardLocation.SOURCE_OUTPUT, "", relative).openInputStream();
+                    in.close();
+                    break;
+            }
+        } catch (IllegalArgumentException expected) {
+            System.out.println("expected exception thrown: " + expected);
+            return;
+        } catch (Exception e) {
+            messager.printMessage(Diagnostic.Kind.ERROR,
+                    "relative path: " + relative + ", kind: " + kind + ", unexpected exception: " + e);
+            return;
+        }
+        messager.printMessage(Diagnostic.Kind.ERROR,
+                "relative path: " + relative + ", kind: " + kind + ", no exception thrown");
+    }
+}
+