diff --git a/tools/preload-check/Android.bp b/tools/preload-check/Android.bp
new file mode 100644
index 0000000..c84567b
--- /dev/null
+++ b/tools/preload-check/Android.bp
@@ -0,0 +1,21 @@
+// Copyright (C) 2019 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.
+
+java_test_host {
+    name: "PreloadCheck",
+    srcs: ["src/**/*.java"],
+    libs: ["tradefed"],
+    test_suites: ["general-tests"],
+    required: ["preload-check-device"],
+}
diff --git a/tools/preload-check/AndroidTest.xml b/tools/preload-check/AndroidTest.xml
new file mode 100644
index 0000000..a0645d5
--- /dev/null
+++ b/tools/preload-check/AndroidTest.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 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.
+-->
+<configuration description="Config for PreloadCheck">
+    <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+        <option name="cleanup" value="true" />
+        <option name="push" value="preload-check-device.jar->/data/local/tmp/preload-check-device.jar" />
+    </target_preparer>
+    <test class="com.android.tradefed.testtype.HostTest" >
+        <option name="class" value="com.android.preload.check.PreloadCheck" />
+    </test>
+</configuration>
diff --git a/tools/preload-check/TEST_MAPPING b/tools/preload-check/TEST_MAPPING
new file mode 100644
index 0000000..d09805e
--- /dev/null
+++ b/tools/preload-check/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "presubmit": [
+    {
+      "name": "PreloadCheck"
+    }
+  ]
+}
diff --git a/tools/preload-check/device/Android.bp b/tools/preload-check/device/Android.bp
new file mode 100644
index 0000000..7782b0d
--- /dev/null
+++ b/tools/preload-check/device/Android.bp
@@ -0,0 +1,27 @@
+// Copyright (C) 2019 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.
+
+java_test_helper_library {
+    name: "preload-check-device",
+    host_supported: false,
+    device_supported: true,
+    compile_dex: true,
+
+    sdk_version: "current",
+    srcs: ["src/**/*.java"],
+    test_suites: ["general-tests"],
+    dex_preopt: {
+        enabled: false,
+    },
+}
diff --git a/tools/preload-check/device/src/com/android/preload/check/Initialized.java b/tools/preload-check/device/src/com/android/preload/check/Initialized.java
new file mode 100644
index 0000000..b21b5f6
--- /dev/null
+++ b/tools/preload-check/device/src/com/android/preload/check/Initialized.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2019 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 com.android.preload.check;
+
+public class Initialized {
+    public static void main(String[] args) throws Exception {
+        Util.assertInitialized(args[0], null);
+        System.out.println("OK");
+    }
+}
diff --git a/tools/preload-check/device/src/com/android/preload/check/IntegrityCheck.java b/tools/preload-check/device/src/com/android/preload/check/IntegrityCheck.java
new file mode 100644
index 0000000..6cc3946
--- /dev/null
+++ b/tools/preload-check/device/src/com/android/preload/check/IntegrityCheck.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2019 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 com.android.preload.check;
+
+public class IntegrityCheck {
+    public static void main(String[] args) throws Exception {
+        ClassLoader loader = IntegrityCheck.class.getClassLoader();
+
+        Util.assertNotInitialized("com.android.preload.check.IntegrityCheck$StatusHelper", loader);
+
+        Class<?> klass = Class.forName("com.android.preload.check.IntegrityCheck$StatusHelper",
+                /* initialize */ true, loader);
+
+        Util.assertInitialized("com.android.preload.check.IntegrityCheck$StatusHelper", loader);
+
+        System.out.println("OK");
+    }
+
+    private static class StatusHelper {
+        private final static Object defer = new Object();
+    }
+}
diff --git a/tools/preload-check/device/src/com/android/preload/check/NotInitialized.java b/tools/preload-check/device/src/com/android/preload/check/NotInitialized.java
new file mode 100644
index 0000000..d2e98fe
--- /dev/null
+++ b/tools/preload-check/device/src/com/android/preload/check/NotInitialized.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2019 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 com.android.preload.check;
+
+public class NotInitialized {
+    public static void main(String[] args) throws Exception {
+        Util.assertNotInitialized(args[0], null);
+        System.out.println("OK");
+    }
+}
diff --git a/tools/preload-check/device/src/com/android/preload/check/Util.java b/tools/preload-check/device/src/com/android/preload/check/Util.java
new file mode 100644
index 0000000..662f67a
--- /dev/null
+++ b/tools/preload-check/device/src/com/android/preload/check/Util.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2019 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 com.android.preload.check;
+
+import java.lang.reflect.Field;
+
+public class Util {
+    private static Field statusField;
+
+    static {
+        try {
+            Class<?> klass = Class.class;
+            statusField = klass.getDeclaredField("status");
+            statusField.setAccessible(true);
+        } catch (Throwable t) {
+            throw new RuntimeException(t);
+        }
+    }
+
+    public static boolean isInitialized(Class<?> klass) throws Exception {
+        Object val = statusField.get(klass);
+        if (val == null || !(val instanceof Integer)) {
+            throw new IllegalStateException(String.valueOf(val));
+        }
+        int intVal = (int)val;
+        intVal = (intVal >> (32-4)) & 0xf;
+        return intVal >= 14;
+    }
+
+    public static void assertTrue(boolean val, String msg) {
+        if (!val) {
+            throw new RuntimeException(msg);
+        }
+    }
+
+    public static void assertInitializedState(String className, boolean expected,
+            ClassLoader loader) {
+        boolean initialized;
+        try {
+            Class<?> klass = Class.forName(className, /* initialize */ false, loader);
+            initialized = isInitialized(klass);
+        } catch (Throwable t) {
+            throw new RuntimeException(t);
+        }
+        assertTrue(expected == initialized, className);
+    }
+
+    public static void assertNotInitialized(String className, ClassLoader loader) {
+        assertInitializedState(className, false, loader);
+    }
+
+    public static void assertInitialized(String className, ClassLoader loader) {
+        assertInitializedState(className, true, loader);
+    }
+}
diff --git a/tools/preload-check/src/com/android/preload/check/PreloadCheck.java b/tools/preload-check/src/com/android/preload/check/PreloadCheck.java
new file mode 100644
index 0000000..dbdecdb
--- /dev/null
+++ b/tools/preload-check/src/com/android/preload/check/PreloadCheck.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2019 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 com.android.preload.check;
+
+import static org.junit.Assert.assertEquals;
+
+import com.android.tradefed.device.ITestDevice;
+import com.android.tradefed.testtype.DeviceJUnit4ClassRunner;
+import com.android.tradefed.testtype.IDeviceTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(DeviceJUnit4ClassRunner.class)
+public class PreloadCheck implements IDeviceTest {
+    private ITestDevice mTestDevice;
+
+    private static final String TEST_CLASSPATH = "/data/local/tmp/preload-check-device.jar";
+
+    @Override
+    public void setDevice(ITestDevice testDevice) {
+        mTestDevice = testDevice;
+    }
+
+    @Override
+    public ITestDevice getDevice() {
+        return mTestDevice;
+    }
+
+    /**
+     * Test that checks work as expected.
+     */
+    @Test
+    public void testStatus() throws Exception {
+        run("com.android.preload.check.IntegrityCheck");
+    }
+
+    /**
+     * b/130206915.
+     */
+    @Test
+    public void testAsyncTask() throws Exception {
+        run("com.android.preload.check.NotInitialized", "android.os.AsyncTask");
+    }
+
+    /**
+     * Just a check for something we expect to see initialized.
+     */
+    @Test
+    public void testAnimator() throws Exception {
+        run("com.android.preload.check.Initialized", "android.animation.Animator");
+    }
+
+    private void run(String cmd, String... args) throws Exception {
+        StringBuilder sb = new StringBuilder();
+        sb.append("app_process ")
+                .append("-cp ").append(TEST_CLASSPATH)
+                .append(" /system/bin ")
+                .append(cmd);
+        for (String arg : args) {
+            sb.append(' ').append(arg);
+        }
+        String res = mTestDevice.executeShellCommand(sb.toString());
+        assertEquals(sb.toString(), "OK", res.trim());
+    }
+}