Add tests for loading with absolute paths through System.load().

Introduce a base class for common tests for all apps.

This just "documents" current behaviour as a preparation for a later CL
that will change the logic for loading private native libs.

Test: atest libnativeloader_e2e_tests
Bug: 237577392
Change-Id: I80fd10f1d980fd79d0f6f544ec6f776987531ee6

12 files changed, 292 insertions, 47 deletions

diff --git a/libnativeloader/test/Android.bp b/libnativeloader/test/Android.bp
index 68c9126407..268e93ab3f 100644
--- a/libnativeloader/test/Android.bp
+++ b/libnativeloader/test/Android.bp
@@ -66,16 +66,6 @@ android_test_helper_app {
     ],
 }
 
-java_library {
-    name: "loadlibrarytest_test_utils",
-    sdk_version: "31",
-    static_libs: [
-        "androidx.test.ext.junit",
-        "androidx.test.ext.truth",
-    ],
-    srcs: ["src/android/test/lib/TestUtils.java"],
-}
-
 // Test fixture that represents a shared library in /system/framework.
 java_library {
     name: "libnativeloader_system_shared_lib",
@@ -110,6 +100,23 @@ java_library {
     srcs: ["src/android/test/vendorsharedlib/VendorSharedLib.java"],
 }
 
+java_library {
+    name: "loadlibrarytest_testlib",
+    sdk_version: "31",
+    static_libs: [
+        "androidx.test.ext.junit",
+        "androidx.test.ext.truth",
+        "androidx.test.rules",
+    ],
+    libs: [
+        "libnativeloader_system_shared_lib",
+        "libnativeloader_system_ext_shared_lib",
+        "libnativeloader_product_shared_lib",
+        "libnativeloader_vendor_shared_lib",
+    ],
+    srcs: ["src/android/test/lib/*.java"],
+}
+
 java_defaults {
     name: "loadlibrarytest_app_defaults",
     defaults: ["art_module_source_build_java_defaults"],
@@ -120,9 +127,7 @@ java_defaults {
     // measures getting enabled in these tests, so set some high number.
     target_sdk_version: "9999",
     static_libs: [
-        "androidx.test.ext.junit",
-        "androidx.test.rules",
-        "loadlibrarytest_test_utils",
+        "loadlibrarytest_testlib",
     ],
     libs: [
         "libnativeloader_system_shared_lib",
diff --git a/libnativeloader/test/src/android/test/app/DataAppTest.java b/libnativeloader/test/src/android/test/app/DataAppTest.java
index 39762ef6cc..905b5bb0d1 100644
--- a/libnativeloader/test/src/android/test/app/DataAppTest.java
+++ b/libnativeloader/test/src/android/test/app/DataAppTest.java
@@ -16,19 +16,24 @@
 
 package android.test.app;
 
+import android.test.lib.AppTestCommon;
 import android.test.lib.TestUtils;
 import android.test.productsharedlib.ProductSharedLib;
 import android.test.systemextsharedlib.SystemExtSharedLib;
 import android.test.systemsharedlib.SystemSharedLib;
 import android.test.vendorsharedlib.VendorSharedLib;
+
 import androidx.test.filters.MediumTest;
-import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.Test;
-import org.junit.runner.RunWith;
 
 @MediumTest
-@RunWith(AndroidJUnit4.class)
-public class DataAppTest {
+public class DataAppTest extends AppTestCommon {
+    @Override
+    public AppLocation getAppLocation() {
+        return AppLocation.DATA;
+    }
+
     @Test
     public void testLoadExtendedPublicLibraries() {
         System.loadLibrary("system_extpub.oem1");
@@ -64,12 +69,15 @@ public class DataAppTest {
     public void testLoadPrivateLibrariesViaSystemSharedLib() {
         // TODO(b/237577392): Loading a private native system library via a shared system library
         // ought to work.
-        // SystemSharedLib.loadLibrary("system_private2");
-        // SystemSharedLib.loadLibrary("systemext_private2");
+        TestUtils.assertLibraryInaccessible(() -> SystemSharedLib.loadLibrary("system_private2"));
+        TestUtils.assertLibraryInaccessible(
+                () -> SystemSharedLib.loadLibrary("systemext_private2"));
+
         if (!TestUtils.skipPublicProductLibTests()) {
             TestUtils.assertLibraryInaccessible(
                     () -> SystemSharedLib.loadLibrary("product_private2"));
         }
+
         TestUtils.assertLibraryInaccessible(() -> SystemSharedLib.loadLibrary("vendor_private2"));
     }
 
@@ -77,12 +85,16 @@ public class DataAppTest {
     public void testLoadPrivateLibrariesViaSystemExtSharedLib() {
         // TODO(b/237577392): Loading a private native system library via a shared system library
         // ought to work.
-        // SystemExtSharedLib.loadLibrary("system_private3");
-        // SystemExtSharedLib.loadLibrary("systemext_private3");
+        TestUtils.assertLibraryInaccessible(
+                () -> SystemExtSharedLib.loadLibrary("system_private3"));
+        TestUtils.assertLibraryInaccessible(
+                () -> SystemExtSharedLib.loadLibrary("systemext_private3"));
+
         if (!TestUtils.skipPublicProductLibTests()) {
             TestUtils.assertLibraryInaccessible(
                     () -> SystemExtSharedLib.loadLibrary("product_private3"));
         }
+
         TestUtils.assertLibraryInaccessible(
                 () -> SystemExtSharedLib.loadLibrary("vendor_private3"));
     }
@@ -92,9 +104,11 @@ public class DataAppTest {
         TestUtils.assertLibraryInaccessible(() -> ProductSharedLib.loadLibrary("system_private4"));
         TestUtils.assertLibraryInaccessible(
                 () -> ProductSharedLib.loadLibrary("systemext_private4"));
+
         if (!TestUtils.skipPublicProductLibTests()) {
             ProductSharedLib.loadLibrary("product_private4");
         }
+
         TestUtils.assertLibraryInaccessible(() -> ProductSharedLib.loadLibrary("vendor_private4"));
     }
 
@@ -103,10 +117,12 @@ public class DataAppTest {
         TestUtils.assertLibraryInaccessible(() -> VendorSharedLib.loadLibrary("system_private5"));
         TestUtils.assertLibraryInaccessible(
                 () -> VendorSharedLib.loadLibrary("systemext_private5"));
+
         if (!TestUtils.skipPublicProductLibTests()) {
             TestUtils.assertLibraryInaccessible(
                     () -> VendorSharedLib.loadLibrary("product_private5"));
         }
+
         VendorSharedLib.loadLibrary("vendor_private5");
     }
 
diff --git a/libnativeloader/test/src/android/test/app/ProductAppTest.java b/libnativeloader/test/src/android/test/app/ProductAppTest.java
index fae20a0806..bfa648b013 100644
--- a/libnativeloader/test/src/android/test/app/ProductAppTest.java
+++ b/libnativeloader/test/src/android/test/app/ProductAppTest.java
@@ -18,6 +18,7 @@ package android.test.app;
 
 import android.os.Build;
 import android.os.SystemProperties;
+import android.test.lib.AppTestCommon;
 import android.test.lib.TestUtils;
 import android.test.productsharedlib.ProductSharedLib;
 import android.test.systemextsharedlib.SystemExtSharedLib;
@@ -25,14 +26,16 @@ import android.test.systemsharedlib.SystemSharedLib;
 import android.test.vendorsharedlib.VendorSharedLib;
 
 import androidx.test.filters.MediumTest;
-import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
-import org.junit.runner.RunWith;
 
 @MediumTest
-@RunWith(AndroidJUnit4.class)
-public class ProductAppTest {
+public class ProductAppTest extends AppTestCommon {
+    @Override
+    public AppLocation getAppLocation() {
+        return AppLocation.PRODUCT;
+    }
+
     // True if apps in product partitions get shared library namespaces, so we
     // cannot test that libs in system and system_ext get blocked.
     private static boolean productAppsAreShared() {
@@ -80,12 +83,15 @@ public class ProductAppTest {
     public void testLoadPrivateLibrariesViaSystemSharedLib() {
         // TODO(b/237577392): Loading a private native system library via a shared system library
         // ought to work.
-        // SystemSharedLib.loadLibrary("system_private2");
-        // SystemSharedLib.loadLibrary("systemext_private2");
+        TestUtils.assertLibraryInaccessible(() -> SystemSharedLib.loadLibrary("system_private2"));
+        TestUtils.assertLibraryInaccessible(
+                () -> SystemSharedLib.loadLibrary("systemext_private2"));
+
         if (!productAppsAreShared()) {
             TestUtils.assertLibraryInaccessible(
                     () -> SystemSharedLib.loadLibrary("product_private2"));
         }
+
         TestUtils.assertLibraryInaccessible(() -> SystemSharedLib.loadLibrary("vendor_private2"));
     }
 
@@ -93,12 +99,16 @@ public class ProductAppTest {
     public void testLoadPrivateLibrariesViaSystemExtSharedLib() {
         // TODO(b/237577392): Loading a private native system library via a shared system library
         // ought to work.
-        // SystemExtSharedLib.loadLibrary("system_private3");
-        // SystemExtSharedLib.loadLibrary("systemext_private3");
+        TestUtils.assertLibraryInaccessible(
+                () -> SystemExtSharedLib.loadLibrary("system_private3"));
+        TestUtils.assertLibraryInaccessible(
+                () -> SystemExtSharedLib.loadLibrary("systemext_private3"));
+
         if (!productAppsAreShared()) {
             TestUtils.assertLibraryInaccessible(
                     () -> SystemExtSharedLib.loadLibrary("product_private3"));
         }
+
         TestUtils.assertLibraryInaccessible(
                 () -> SystemExtSharedLib.loadLibrary("vendor_private3"));
     }
@@ -111,7 +121,10 @@ public class ProductAppTest {
             TestUtils.assertLibraryInaccessible(
                     () -> ProductSharedLib.loadLibrary("systemext_private4"));
         }
+
+        // Can load product_private4 by name only through the app classloader namespace.
         ProductSharedLib.loadLibrary("product_private4");
+
         TestUtils.assertLibraryInaccessible(() -> ProductSharedLib.loadLibrary("vendor_private4"));
     }
 
@@ -122,8 +135,10 @@ public class ProductAppTest {
                     () -> VendorSharedLib.loadLibrary("system_private5"));
             TestUtils.assertLibraryInaccessible(
                     () -> VendorSharedLib.loadLibrary("systemext_private5"));
+
             TestUtils.assertLibraryInaccessible(
                     () -> VendorSharedLib.loadLibrary("product_private5"));
+
             // When the app has a shared namespace, its libraries get loaded
             // with shared namespaces as well, inheriting the same paths. So
             // since the app wouldn't have access to /vendor/${LIB},
diff --git a/libnativeloader/test/src/android/test/app/SystemAppTest.java b/libnativeloader/test/src/android/test/app/SystemAppTest.java
index 5c55f93974..8d14753b18 100644
--- a/libnativeloader/test/src/android/test/app/SystemAppTest.java
+++ b/libnativeloader/test/src/android/test/app/SystemAppTest.java
@@ -16,20 +16,25 @@
 
 package android.test.app;
 
+import android.test.lib.AppTestCommon;
 import android.test.lib.TestUtils;
 import android.test.productsharedlib.ProductSharedLib;
 import android.test.systemextsharedlib.SystemExtSharedLib;
 import android.test.systemsharedlib.SystemSharedLib;
 import android.test.vendorsharedlib.VendorSharedLib;
+
 import androidx.test.filters.MediumTest;
-import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.Test;
-import org.junit.runner.RunWith;
 
 // These tests are run from /system/app, /system/priv-app, and /system_ext/app.
 @MediumTest
-@RunWith(AndroidJUnit4.class)
-public class SystemAppTest {
+public class SystemAppTest extends AppTestCommon {
+    @Override
+    public AppLocation getAppLocation() {
+        return AppLocation.SYSTEM;
+    }
+
     @Test
     public void testPrivateLibsExist() {
         TestUtils.testPrivateLibsExist("/system", "system_private");
@@ -72,10 +77,12 @@ public class SystemAppTest {
     public void testLoadPrivateLibrariesViaSystemSharedLib() {
         SystemSharedLib.loadLibrary("system_private2");
         SystemSharedLib.loadLibrary("systemext_private2");
+
         if (!TestUtils.skipPublicProductLibTests()) {
             TestUtils.assertLibraryInaccessible(
                     () -> SystemSharedLib.loadLibrary("product_private2"));
         }
+
         TestUtils.assertLibraryInaccessible(() -> SystemSharedLib.loadLibrary("vendor_private2"));
     }
 
@@ -83,33 +90,43 @@ public class SystemAppTest {
     public void testLoadPrivateLibrariesViaSystemExtSharedLib() {
         SystemExtSharedLib.loadLibrary("system_private3");
         SystemExtSharedLib.loadLibrary("systemext_private3");
+
         if (!TestUtils.skipPublicProductLibTests()) {
             TestUtils.assertLibraryInaccessible(
                     () -> SystemExtSharedLib.loadLibrary("product_private3"));
         }
+
         TestUtils.assertLibraryInaccessible(
                 () -> SystemExtSharedLib.loadLibrary("vendor_private3"));
     }
 
     @Test
     public void testLoadPrivateLibrariesViaProductSharedLib() {
+        // See AppTestCommon.isSharedSystemApp() for an explanation of these
+        // behaviours.
         ProductSharedLib.loadLibrary("system_private4");
         ProductSharedLib.loadLibrary("systemext_private4");
+
         if (!TestUtils.skipPublicProductLibTests()) {
             TestUtils.assertLibraryInaccessible(
                     () -> ProductSharedLib.loadLibrary("product_private4"));
         }
+
         TestUtils.assertLibraryInaccessible(() -> ProductSharedLib.loadLibrary("vendor_private4"));
     }
 
     @Test
     public void testLoadPrivateLibrariesViaVendorSharedLib() {
+        // See AppTestCommon.isSharedSystemApp() for an explanation of these
+        // behaviours.
         VendorSharedLib.loadLibrary("system_private5");
         VendorSharedLib.loadLibrary("systemext_private5");
+
         if (!TestUtils.skipPublicProductLibTests()) {
             TestUtils.assertLibraryInaccessible(
                     () -> VendorSharedLib.loadLibrary("product_private5"));
         }
+
         TestUtils.assertLibraryInaccessible(() -> VendorSharedLib.loadLibrary("vendor_private5"));
     }
 
diff --git a/libnativeloader/test/src/android/test/app/VendorAppTest.java b/libnativeloader/test/src/android/test/app/VendorAppTest.java
index 2177cf2cc4..377f670c74 100644
--- a/libnativeloader/test/src/android/test/app/VendorAppTest.java
+++ b/libnativeloader/test/src/android/test/app/VendorAppTest.java
@@ -16,19 +16,24 @@
 
 package android.test.app;
 
+import android.test.lib.AppTestCommon;
 import android.test.lib.TestUtils;
 import android.test.productsharedlib.ProductSharedLib;
 import android.test.systemextsharedlib.SystemExtSharedLib;
 import android.test.systemsharedlib.SystemSharedLib;
 import android.test.vendorsharedlib.VendorSharedLib;
+
 import androidx.test.filters.MediumTest;
-import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.Test;
-import org.junit.runner.RunWith;
 
 @MediumTest
-@RunWith(AndroidJUnit4.class)
-public class VendorAppTest {
+public class VendorAppTest extends AppTestCommon {
+    @Override
+    public AppLocation getAppLocation() {
+        return AppLocation.VENDOR;
+    }
+
     @Test
     public void testPrivateLibsExist() {
         TestUtils.testPrivateLibsExist("/vendor", "vendor_private");
@@ -68,12 +73,15 @@ public class VendorAppTest {
     public void testLoadPrivateLibrariesViaSystemSharedLib() {
         // TODO(b/237577392): Loading a private native system library via a shared system library
         // ought to work.
-        // SystemSharedLib.loadLibrary("system_private2");
-        // SystemSharedLib.loadLibrary("systemext_private2");
+        TestUtils.assertLibraryInaccessible(() -> SystemSharedLib.loadLibrary("system_private2"));
+        TestUtils.assertLibraryInaccessible(
+                () -> SystemSharedLib.loadLibrary("systemext_private2"));
+
         if (!TestUtils.skipPublicProductLibTests()) {
             TestUtils.assertLibraryInaccessible(
                     () -> SystemSharedLib.loadLibrary("product_private2"));
         }
+
         TestUtils.assertLibraryInaccessible(() -> SystemSharedLib.loadLibrary("vendor_private2"));
     }
 
@@ -81,12 +89,16 @@ public class VendorAppTest {
     public void testLoadPrivateLibrariesViaSystemExtSharedLib() {
         // TODO(b/237577392): Loading a private native system library via a shared system library
         // ought to work.
-        // SystemExtSharedLib.loadLibrary("system_private3");
-        // SystemExtSharedLib.loadLibrary("systemext_private3");
+        TestUtils.assertLibraryInaccessible(
+                () -> SystemExtSharedLib.loadLibrary("system_private3"));
+        TestUtils.assertLibraryInaccessible(
+                () -> SystemExtSharedLib.loadLibrary("systemext_private3"));
+
         if (!TestUtils.skipPublicProductLibTests()) {
             TestUtils.assertLibraryInaccessible(
                     () -> SystemExtSharedLib.loadLibrary("product_private3"));
         }
+
         TestUtils.assertLibraryInaccessible(
                 () -> SystemExtSharedLib.loadLibrary("vendor_private3"));
     }
@@ -96,9 +108,11 @@ public class VendorAppTest {
         TestUtils.assertLibraryInaccessible(() -> ProductSharedLib.loadLibrary("system_private4"));
         TestUtils.assertLibraryInaccessible(
                 () -> ProductSharedLib.loadLibrary("systemext_private4"));
+
         if (!TestUtils.skipPublicProductLibTests()) {
             ProductSharedLib.loadLibrary("product_private4");
         }
+
         TestUtils.assertLibraryInaccessible(() -> ProductSharedLib.loadLibrary("vendor_private4"));
     }
 
@@ -107,10 +121,13 @@ public class VendorAppTest {
         TestUtils.assertLibraryInaccessible(() -> VendorSharedLib.loadLibrary("system_private5"));
         TestUtils.assertLibraryInaccessible(
                 () -> VendorSharedLib.loadLibrary("systemext_private5"));
+
         if (!TestUtils.skipPublicProductLibTests()) {
             TestUtils.assertLibraryInaccessible(
                     () -> VendorSharedLib.loadLibrary("product_private5"));
         }
+
+        // Can load vendor_private5 by name only through the app classloader namespace.
         VendorSharedLib.loadLibrary("vendor_private5");
     }
 
diff --git a/libnativeloader/test/src/android/test/hostside/LibnativeloaderTest.java b/libnativeloader/test/src/android/test/hostside/LibnativeloaderTest.java
index 80bd72667e..bcb4528ffe 100644
--- a/libnativeloader/test/src/android/test/hostside/LibnativeloaderTest.java
+++ b/libnativeloader/test/src/android/test/hostside/LibnativeloaderTest.java
@@ -281,7 +281,7 @@ public class LibnativeloaderTest extends BaseHostJUnit4Test {
             //
             // Remember to update testPrivateLibsExist in TestUtils.java when
             // the number of libraries changes.
-            for (int i = 1; i <= 6; ++i) {
+            for (int i = 1; i <= 10; ++i) {
                 pushNativeTestLib(libApk, "libsystem_testlib.so",
                         "/system/${LIB}/libsystem_private" + i + ".so");
                 pushNativeTestLib(libApk, "libsystem_testlib.so",
diff --git a/libnativeloader/test/src/android/test/lib/AppTestCommon.java b/libnativeloader/test/src/android/test/lib/AppTestCommon.java
new file mode 100644
index 0000000000..36ef3dc77a
--- /dev/null
+++ b/libnativeloader/test/src/android/test/lib/AppTestCommon.java
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2024 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 android.test.lib;
+
+import android.test.productsharedlib.ProductSharedLib;
+import android.test.systemextsharedlib.SystemExtSharedLib;
+import android.test.systemsharedlib.SystemSharedLib;
+import android.test.vendorsharedlib.VendorSharedLib;
+
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public abstract class AppTestCommon {
+    public enum AppLocation { DATA, SYSTEM, PRODUCT, VENDOR }
+
+    public abstract AppLocation getAppLocation();
+
+    // Loading private libs using absolute paths through shared libs should only
+    // depend on the location of the shared lib, so these tests are shared for
+    // all apps, regardless of location.
+
+    // There's an exception for system apps. For them LibraryNamespaces::Create
+    // gets called with is_shared=true. That means they don't set up separate
+    // "unbundled" namespaces for the shared libs in product and vendor, so
+    // ProductSharedLib and VendorSharedLib can still load private system libs
+    // through their classloader namespaces, but not the private libs in the
+    // same partition as themselves.
+    private boolean isSharedSystemApp() {
+        return getAppLocation() == AppLocation.SYSTEM;
+    }
+
+    @Test
+    public void testLoadPrivateLibrariesViaSystemSharedLibWithAbsolutePaths() {
+        if (getAppLocation() == AppLocation.SYSTEM) {
+            SystemSharedLib.load(TestUtils.libPath("/system", "system_private7"));
+            SystemSharedLib.load(TestUtils.libPath("/system_ext", "systemext_private7"));
+        } else {
+            // Cannot load private system libs because there is no provision in
+            // LibraryNamespaces::Create to create an "unbundled system apk" for
+            // shared system libs based on their location. Hence SystemSharedLib
+            // gets a classloader namespace as an "other apk", with the same
+            // library_path as the app.
+            TestUtils.assertLibraryInaccessible(() -> {
+                SystemSharedLib.load(TestUtils.libPath("/system", "system_private7"));
+            });
+            TestUtils.assertLibraryInaccessible(() -> {
+                SystemSharedLib.load(TestUtils.libPath("/system_ext", "systemext_private7"));
+            });
+        }
+
+        TestUtils.assertLibraryInaccessible(
+                () -> { SystemSharedLib.load(TestUtils.libPath("/product", "product_private7")); });
+
+        TestUtils.assertLibraryInaccessible(
+                () -> { SystemSharedLib.load(TestUtils.libPath("/vendor", "vendor_private7")); });
+    }
+
+    @Test
+    public void testLoadPrivateLibrariesViaSystemExtSharedLibWithAbsolutePaths() {
+        if (getAppLocation() == AppLocation.SYSTEM) {
+            SystemExtSharedLib.load(TestUtils.libPath("/system", "system_private8"));
+            SystemExtSharedLib.load(TestUtils.libPath("/system_ext", "systemext_private8"));
+        } else {
+            // See comment in the corresponding test for SystemSharedLib above.
+            TestUtils.assertLibraryInaccessible(() -> {
+                SystemExtSharedLib.load(TestUtils.libPath("/system", "system_private8"));
+            });
+            TestUtils.assertLibraryInaccessible(() -> {
+                SystemExtSharedLib.load(TestUtils.libPath("/system_ext", "systemext_private8"));
+            });
+        }
+
+        TestUtils.assertLibraryInaccessible(() -> {
+            SystemExtSharedLib.load(TestUtils.libPath("/product", "product_private8"));
+        });
+
+        TestUtils.assertLibraryInaccessible(() -> {
+            SystemExtSharedLib.load(TestUtils.libPath("/vendor", "vendor_private8"));
+        });
+    }
+
+    @Test
+    public void testLoadPrivateLibrariesViaProductSharedLibWithAbsolutePaths() {
+        if (isSharedSystemApp()) {
+            ProductSharedLib.load(TestUtils.libPath("/system", "system_private9"));
+            ProductSharedLib.load(TestUtils.libPath("/system_ext", "systemext_private9"));
+        } else {
+            TestUtils.assertLibraryInaccessible(() -> {
+                ProductSharedLib.load(TestUtils.libPath("/system", "system_private9"));
+            });
+            TestUtils.assertLibraryInaccessible(() -> {
+                ProductSharedLib.load(TestUtils.libPath("/system_ext", "systemext_private9"));
+            });
+        }
+
+        if (!isSharedSystemApp()) {
+            ProductSharedLib.load(TestUtils.libPath("/product", "product_private9"));
+        } else {
+            TestUtils.assertLibraryInaccessible(() -> {
+                ProductSharedLib.load(TestUtils.libPath("/product", "product_private9"));
+            });
+        }
+
+        TestUtils.assertLibraryInaccessible(
+                () -> { ProductSharedLib.load(TestUtils.libPath("/vendor", "vendor_private9")); });
+    }
+
+    @Test
+    public void testLoadPrivateLibrariesViaVendorSharedLibWithAbsolutePaths() {
+        if (isSharedSystemApp()) {
+            VendorSharedLib.load(TestUtils.libPath("/system", "system_private10"));
+            VendorSharedLib.load(TestUtils.libPath("/system_ext", "systemext_private10"));
+        } else {
+            TestUtils.assertLibraryInaccessible(() -> {
+                VendorSharedLib.load(TestUtils.libPath("/system", "system_private10"));
+            });
+            TestUtils.assertLibraryInaccessible(() -> {
+                VendorSharedLib.load(TestUtils.libPath("/system_ext", "systemext_private10"));
+            });
+        }
+
+        TestUtils.assertLibraryInaccessible(() -> {
+            VendorSharedLib.load(TestUtils.libPath("/product", "product_private10"));
+        });
+
+        if (!isSharedSystemApp()) {
+            VendorSharedLib.load(TestUtils.libPath("/vendor", "vendor_private10"));
+        } else {
+            TestUtils.assertLibraryInaccessible(() -> {
+                VendorSharedLib.load(TestUtils.libPath("/vendor", "vendor_private10"));
+            });
+        }
+    }
+}
diff --git a/libnativeloader/test/src/android/test/lib/TestUtils.java b/libnativeloader/test/src/android/test/lib/TestUtils.java
index 26bc0f8265..6d2a9db0f3 100644
--- a/libnativeloader/test/src/android/test/lib/TestUtils.java
+++ b/libnativeloader/test/src/android/test/lib/TestUtils.java
@@ -52,7 +52,7 @@ public final class TestUtils {
     public static void testPrivateLibsExist(String libDir, String libStem) {
         // Remember to update pushPrivateLibs in LibnativeloaderTest.java when
         // the number of libraries changes.
-        for (int i = 1; i <= 6; ++i) {
+        for (int i = 1; i <= 10; ++i) {
             String libPath = libPath(libDir, libStem + i);
             assertWithMessage(libPath + " does not exist")
                     .that(new File(libPath).exists())
diff --git a/libnativeloader/test/src/android/test/productsharedlib/ProductSharedLib.java b/libnativeloader/test/src/android/test/productsharedlib/ProductSharedLib.java
index a500d2a976..a8966d9825 100644
--- a/libnativeloader/test/src/android/test/productsharedlib/ProductSharedLib.java
+++ b/libnativeloader/test/src/android/test/productsharedlib/ProductSharedLib.java
@@ -17,5 +17,11 @@
 package android.test.productsharedlib;
 
 public final class ProductSharedLib {
-    public static void loadLibrary(String name) { System.loadLibrary(name); }
+    public static void loadLibrary(String name) {
+        System.loadLibrary(name);
+    }
+
+    public static void load(String path) {
+        System.load(path);
+    }
 }
diff --git a/libnativeloader/test/src/android/test/systemextsharedlib/SystemExtSharedLib.java b/libnativeloader/test/src/android/test/systemextsharedlib/SystemExtSharedLib.java
index 1240e12e55..ae9a6da053 100644
--- a/libnativeloader/test/src/android/test/systemextsharedlib/SystemExtSharedLib.java
+++ b/libnativeloader/test/src/android/test/systemextsharedlib/SystemExtSharedLib.java
@@ -17,5 +17,11 @@
 package android.test.systemextsharedlib;
 
 public final class SystemExtSharedLib {
-    public static void loadLibrary(String name) { System.loadLibrary(name); }
+    public static void loadLibrary(String name) {
+        System.loadLibrary(name);
+    }
+
+    public static void load(String path) {
+        System.load(path);
+    }
 }
diff --git a/libnativeloader/test/src/android/test/systemsharedlib/SystemSharedLib.java b/libnativeloader/test/src/android/test/systemsharedlib/SystemSharedLib.java
index 8e2af9f79c..ba8c9e2574 100644
--- a/libnativeloader/test/src/android/test/systemsharedlib/SystemSharedLib.java
+++ b/libnativeloader/test/src/android/test/systemsharedlib/SystemSharedLib.java
@@ -17,5 +17,11 @@
 package android.test.systemsharedlib;
 
 public final class SystemSharedLib {
-    public static void loadLibrary(String name) { System.loadLibrary(name); }
+    public static void loadLibrary(String name) {
+        System.loadLibrary(name);
+    }
+
+    public static void load(String path) {
+        System.load(path);
+    }
 }
diff --git a/libnativeloader/test/src/android/test/vendorsharedlib/VendorSharedLib.java b/libnativeloader/test/src/android/test/vendorsharedlib/VendorSharedLib.java
index 8859b63db4..14223d88f8 100644
--- a/libnativeloader/test/src/android/test/vendorsharedlib/VendorSharedLib.java
+++ b/libnativeloader/test/src/android/test/vendorsharedlib/VendorSharedLib.java
@@ -17,5 +17,11 @@
 package android.test.vendorsharedlib;
 
 public final class VendorSharedLib {
-    public static void loadLibrary(String name) { System.loadLibrary(name); }
+    public static void loadLibrary(String name) {
+        System.loadLibrary(name);
+    }
+
+    public static void load(String path) {
+        System.load(path);
+    }
 }