Avoid internal APEX stubs in libnative{bridge,loader} and clean up

exported symbols.

The APEX stubs don't have any practical effect on the lazy loading
library wrappers. Add notes about that and update the function wrappers
to keep them in sync.

Also add tests for the lazy libraries. That necessitated some
reshuffling in libnativeloader tests to reuse the mocks.

Cherry-picked from https://r.android.com/1678729.

Test: art/libnativebridge/tests/runtests.sh
Test: atest libnativebridge-lazy-tests
Test: atest libnativeloader_test libnativeloader_lazy_test
Bug: 122710865
Change-Id: I7e291f2e84d8e35731dfb1114c9b19978ff87969
Merged-In: I7e291f2e84d8e35731dfb1114c9b19978ff87969

1 files changed, 54 insertions, 0 deletions

diff --git a/libnativebridge/tests/libnativebridge_lazy_test.cpp b/libnativebridge/tests/libnativebridge_lazy_test.cpp
new file mode 100644
index 0000000000..e1d66f53df
--- /dev/null
+++ b/libnativebridge/tests/libnativebridge_lazy_test.cpp
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+
+#include <android-base/macros.h>
+#include <gtest/gtest.h>
+
+#include "nativebridge/native_bridge.h"
+
+namespace android {
+
+class NativeBridgeLazyTest : public ::testing::Test {};
+
+// The testing we can do here is limited since there's no exported API to
+// actually load the native bridge, but we only need to test the trivial
+// wrappers.
+
+TEST_F(NativeBridgeLazyTest, NeedsNativeBridge) {
+  EXPECT_FALSE(NeedsNativeBridge(ABI_STRING));
+}
+
+TEST_F(NativeBridgeLazyTest, PreInitializeNativeBridge) {
+  EXPECT_FALSE(PreInitializeNativeBridge(nullptr, ""));
+}
+
+TEST_F(NativeBridgeLazyTest, NativeBridgeAvailable) {
+  EXPECT_FALSE(NativeBridgeAvailable());
+}
+
+TEST_F(NativeBridgeLazyTest, NativeBridgeInitialized) {
+  EXPECT_FALSE(NativeBridgeInitialized());
+}
+
+TEST_F(NativeBridgeLazyTest, NativeBridgeGetTrampoline) {
+  EXPECT_EQ(nullptr, NativeBridgeGetTrampoline(nullptr, nullptr, nullptr, 0));
+}
+
+TEST_F(NativeBridgeLazyTest, NativeBridgeGetError) {
+  EXPECT_STREQ("native bridge is not initialized", NativeBridgeGetError());
+}
+
+};  // namespace android