Fixing Unsafe.getUnsafe() to look up the stack the correct number of frames.

Also tests for Unsafe.getUnsafe() and all the requisite AllTests files
to make that show up in the continuous build.
diff --git a/libcore/luni/src/test/java/tests/AllTests.java b/libcore/luni/src/test/java/tests/AllTests.java
index 9ef1aa8..26e58c1 100644
--- a/libcore/luni/src/test/java/tests/AllTests.java
+++ b/libcore/luni/src/test/java/tests/AllTests.java
@@ -49,6 +49,7 @@
         suite.addTest(tests.regex.AllTests.suite());
         suite.addTest(tests.security.AllTests.suite());
         suite.addTest(tests.sql.AllTests.suite());
+        suite.addTest(tests.suncompat.AllTests.suite());
         suite.addTest(tests.text.AllTests.suite());
         suite.addTest(tests.xml.AllTests.suite());
         suite.addTest(tests.xnet.AllTests.suite());
diff --git a/libcore/suncompat/src/main/java/sun/misc/Unsafe.java b/libcore/suncompat/src/main/java/sun/misc/Unsafe.java
index e880af2..6ae572f 100644
--- a/libcore/suncompat/src/main/java/sun/misc/Unsafe.java
+++ b/libcore/suncompat/src/main/java/sun/misc/Unsafe.java
@@ -52,9 +52,7 @@
          * Only code on the bootclasspath is allowed to get at the
          * Unsafe instance.
          */
-        ClassLoader calling = VMStack.getCallingClassLoader2();
-        ClassLoader current = Unsafe.class.getClassLoader();
-
+        ClassLoader calling = VMStack.getCallingClassLoader();
         if ((calling != null) && (calling != Unsafe.class.getClassLoader())) {
             throw new SecurityException("Unsafe access denied");
         }
diff --git a/libcore/suncompat/src/test/java/sun/misc/AllTests.java b/libcore/suncompat/src/test/java/sun/misc/AllTests.java
new file mode 100644
index 0000000..8ea3bcf
--- /dev/null
+++ b/libcore/suncompat/src/test/java/sun/misc/AllTests.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sun.misc;
+
+import junit.framework.Test;
+import junit.framework.TestSuite;
+
+public class AllTests {
+
+    public static void main(String[] args) {
+        junit.textui.TestRunner.run(AllTests.suite());
+    }
+
+    public static Test suite() {
+        TestSuite suite = tests.TestSuiteFactory.createTestSuite("Test for sun.misc");
+
+        // $JUnit-BEGIN$
+
+        suite.addTestSuite(UnsafeTest.class);
+
+        // $JUnit-END$
+
+        return suite;
+    }
+}
diff --git a/libcore/suncompat/src/test/java/sun/misc/UnsafeTest.java b/libcore/suncompat/src/test/java/sun/misc/UnsafeTest.java
new file mode 100644
index 0000000..338055b
--- /dev/null
+++ b/libcore/suncompat/src/test/java/sun/misc/UnsafeTest.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sun.misc;
+
+import dalvik.annotation.TestLevel;
+import dalvik.annotation.TestTargetClass;
+import dalvik.annotation.TestTargetNew;
+import junit.framework.TestCase;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+
+@TestTargetClass(Unsafe.class)
+public class UnsafeTest extends TestCase {
+
+    @TestTargetNew(
+            level = TestLevel.PARTIAL,
+            notes = "",
+            method = "getUnsafe",
+            args = {}
+    )
+    public void test_getUnsafeForbidden() {
+        try {
+            Unsafe.getUnsafe();
+            fail();
+        } catch (SecurityException expected) {
+        }
+    }
+
+    /**
+     * Regression for 2053217. We used to look one level higher than necessary
+     * on the stack.
+     */
+    @TestTargetNew(
+            level = TestLevel.PARTIAL,
+            notes = "",
+            method = "getUnsafe",
+            args = {}
+    )
+    public void test_getUnsafeForbiddenWithSystemCaller() throws Exception {
+        Callable<Object> callable = Executors.callable(new Runnable() {
+            public void run() {
+                Unsafe.getUnsafe();
+            }
+        });
+
+        try {
+            callable.call();
+            fail();
+        } catch (SecurityException expected) {
+        }
+    }
+}
diff --git a/libcore/suncompat/src/test/java/tests/suncompat/AllTests.java b/libcore/suncompat/src/test/java/tests/suncompat/AllTests.java
new file mode 100644
index 0000000..0884517
--- /dev/null
+++ b/libcore/suncompat/src/test/java/tests/suncompat/AllTests.java
@@ -0,0 +1,38 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package tests.suncompat;
+
+import junit.framework.Test;
+import junit.framework.TestSuite;
+
+/**
+ * Test suite that includes all tests for the suncompat project.
+ */
+public class AllTests {
+
+    public static void main(String[] args) {
+        junit.textui.TestRunner.run(AllTests.suite());
+    }
+
+    public static Test suite() {
+        TestSuite suite = tests.TestSuiteFactory.createTestSuite("All suncompat test suites");
+        // $JUnit-BEGIN$
+        suite.addTest(sun.misc.AllTests.suite());
+        // $JUnit-END$
+        return suite;
+    }
+}