--- a/src/share/classes/com/sun/tools/javac/file/JavacFileManager.java	Tue Jan 11 08:05:28 2011 -0800
+++ b/src/share/classes/com/sun/tools/javac/file/JavacFileManager.java	Thu Jan 13 11:48:10 2011 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2011, 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
@@ -472,7 +472,7 @@
      */
     protected Archive openArchive(File zipFileName) throws IOException {
         File origZipFileName = zipFileName;
-        if (!ignoreSymbolFile && paths.isBootClassPathRtJar(zipFileName)) {
+        if (!ignoreSymbolFile && paths.isDefaultBootClassPathRtJar(zipFileName)) {
             File file = zipFileName.getParentFile().getParentFile(); // ${java.home}
             if (new File(file.getName()).equals(new File("jre")))
                 file = file.getParentFile();

--- a/src/share/classes/com/sun/tools/javac/file/Paths.java	Tue Jan 11 08:05:28 2011 -0800
+++ b/src/share/classes/com/sun/tools/javac/file/Paths.java	Thu Jan 13 11:48:10 2011 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2011, 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
@@ -112,7 +112,7 @@
      * rt.jar as found on the default bootclass path.  If the user specified a
      * bootclasspath, null is used.
      */
-    private File bootClassPathRtJar = null;
+    private File defaultBootClassPathRtJar = null;
 
     /**
      *  Is bootclasspath the default?
@@ -143,8 +143,10 @@
                 // no defaults for other paths
                 p = null;
         } else {
-            if (location == PLATFORM_CLASS_PATH)
+            if (location == PLATFORM_CLASS_PATH) {
+                defaultBootClassPathRtJar = null;
                 isDefaultBootClassPath = false;
+            }
             p = new Path();
             for (File f: path)
                 p.addFile(f, warn); // TODO: is use of warn appropriate?
@@ -185,8 +187,8 @@
             : Collections.unmodifiableCollection(p);
     }
 
-    boolean isBootClassPathRtJar(File file) {
-        return file.equals(bootClassPathRtJar);
+    boolean isDefaultBootClassPathRtJar(File file) {
+        return file.equals(defaultBootClassPathRtJar);
     }
 
     /**
@@ -355,7 +357,7 @@
     }
 
     private Path computeBootClassPath() {
-        bootClassPathRtJar = null;
+        defaultBootClassPathRtJar = null;
         Path path = new Path();
 
         String bootclasspathOpt = options.get(BOOTCLASSPATH);
@@ -380,7 +382,7 @@
             File rt_jar = new File("rt.jar");
             for (File file : getPathEntries(files)) {
                 if (new File(file.getName()).equals(rt_jar))
-                    bootClassPathRtJar = file;
+                    defaultBootClassPathRtJar = file;
             }
         }
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/api/T6430241.java	Thu Jan 13 11:48:10 2011 -0800
@@ -0,0 +1,237 @@
+    /*
+     * Copyright (c) 2011, 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 6430241
+     * @summary Hard to disable symbol file feature through API
+     */
+
+    import java.io.*;
+    import java.util.*;
+    import javax.tools.*;
+
+    import com.sun.source.util.JavacTask;
+    import com.sun.tools.javac.api.JavacTool;
+
+    public class T6430241 {
+        public static void main(String... args) throws Exception {
+            new T6430241().run();
+        }
+
+        void run() throws Exception {
+            setup();
+            testCommandLine();
+            testSimpleAPI();
+            testTaskAPI();
+
+            if (errors > 0)
+                throw new Exception(errors + " errors found");
+        }
+
+        void setup() throws Exception {
+            classesDir = new File("classes");
+            classesDir.mkdirs();
+
+            emptyDir = new File("empty");
+            emptyDir.mkdirs();
+
+            bootClassPath = System.getProperty("sun.boot.class.path");
+
+            File srcDir = new File("src");
+            String test = "import sun.misc.Unsafe; class Test { }";
+            testFile = writeFile(srcDir, "Test.java", test);
+        }
+
+        //----- tests for command line invocation
+
+        void testCommandLine() throws Exception {
+            testCommandLine(true);
+            testCommandLine(true,  "-Xbootclasspath/p:" + emptyDir);
+            testCommandLine(false, "-Xbootclasspath:" + bootClassPath);
+            testCommandLine(true,  "-Xbootclasspath/a:" + emptyDir);
+            testCommandLine(false, "-XDignore.symbol.file");
+            System.err.println();
+        }
+
+        void testCommandLine(boolean expectWarnings, String... opts) throws Exception {
+            System.err.println("test command line: " + Arrays.asList(opts));
+
+            String[] args = initArgs(opts);
+
+            StringWriter sw = new StringWriter();
+            PrintWriter pw = new PrintWriter(sw);
+            int rc = com.sun.tools.javac.Main.compile(args, pw);
+            String out = showOutput(sw.toString());
+
+            checkCompilationOK(rc);
+            checkOutput(out, expectWarnings);
+        }
+
+        //----- tests for simple API invocation
+
+        void testSimpleAPI() {
+            testSimpleAPI(true);
+            testSimpleAPI(true,  "-Xbootclasspath/p:" + emptyDir);
+            testSimpleAPI(false, "-Xbootclasspath:" + bootClassPath);
+            testSimpleAPI(true,  "-Xbootclasspath/a:" + emptyDir);
+            testSimpleAPI(false, "-XDignore.symbol.file");
+            System.err.println();
+        }
+
+        void testSimpleAPI(boolean expectWarnings, String... opts) {
+            System.err.println("test simple API: " + Arrays.asList(opts));
+
+            String[] args = initArgs(opts);
+
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            PrintStream ps = new PrintStream(baos);
+
+            JavacTool tool = JavacTool.create();
+            int rc = tool.run(null, null, ps, args);
+
+            String out = showOutput(baos.toString());
+
+            checkCompilationOK(rc);
+            checkOutput(out, expectWarnings);
+        }
+
+        //----- tests for CompilationTask API invocation
+
+        void testTaskAPI() throws Exception {
+            List<File> bcp = new ArrayList<File>();
+            for (String f: bootClassPath.split(File.pathSeparator)) {
+                if (!f.isEmpty())
+                    bcp.add(new File(f));
+            }
+
+            testTaskAPI(true, null);
+            testTaskAPI(false, bcp);
+            System.err.println();
+        }
+
+        void testTaskAPI(boolean expectWarnings, Iterable<? extends File> pcp) throws Exception {
+            System.err.println("test task API: " + pcp);
+
+            JavacTool tool = JavacTool.create();
+            StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null);
+
+            if (pcp != null)
+                fm.setLocation(StandardLocation.PLATFORM_CLASS_PATH, pcp);
+
+            Iterable<? extends JavaFileObject> files = fm.getJavaFileObjects(testFile);
+
+            StringWriter sw = new StringWriter();
+            PrintWriter pw = new PrintWriter(sw);
+            JavacTask task = tool.getTask(pw, fm, null, null, null, files);
+            boolean ok = task.call();
+            String out = showOutput(sw.toString());
+
+            checkCompilationOK(ok);
+            checkOutput(out, expectWarnings);
+        }
+
+        //----- utility methods
+
+        /**
+         * Create a file with given content.
+         */
+        File writeFile(File dir, String path, String content) throws IOException {
+            File f = new File(dir, path);
+            f.getParentFile().mkdirs();
+            FileWriter out = new FileWriter(f);
+            try {
+                out.write(content);
+            } finally {
+                out.close();
+            }
+            return f;
+        }
+
+        /**
+         * Initialize args for compilation with given opts.
+         * @return opts -d classesDir testFile
+         */
+        String[] initArgs(String[] opts) {
+            List<String> args = new ArrayList<String>();
+            args.addAll(Arrays.asList(opts));
+            args.add("-d");
+            args.add(classesDir.getPath());
+            args.add(testFile.getPath());
+            return args.toArray(new String[args.size()]);
+        }
+
+        /**
+         * Show output from compilation if non empty.
+         */
+        String showOutput(String out) {
+            if (!out.isEmpty())
+                System.err.println(out);
+            return out;
+        }
+
+        /**
+         * Verify compilation succeeeded.
+         */
+        void checkCompilationOK(boolean ok) {
+            if (!ok)
+                error("compilation failed");
+        }
+
+        /**
+         * Verify compilation succeeeded.
+         */
+        void checkCompilationOK(int rc) {
+            if (rc != 0)
+                error("compilation failed, rc: " + rc);
+        }
+
+        /**
+         * Check whether output contains warnings if and only if warnings
+         * are expected.
+         */
+        void checkOutput(String out, boolean expectWarnings) {
+            boolean foundWarnings = out.contains("warning");
+            if (foundWarnings) {
+                if (!expectWarnings)
+                    error("unexpected warnings found");
+            } else {
+                if (expectWarnings)
+                    error("expected warnings not found");
+            }
+        }
+
+        /**
+         * Report an error.
+         */
+        void error(String msg) {
+            System.err.println("error: " + msg);
+            errors++;
+        }
+
+        String bootClassPath;
+        File classesDir;
+        File emptyDir;
+        File testFile;
+        int errors;
+    }