79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "library_tests"
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#include <utils/Log.h>
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#include <mediautils/Library.h>
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#include <android-base/file.h>
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#include <gtest/gtest.h>
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using namespace android::mediautils;
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namespace {
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static int32_t here = 0; // accessed on same thread.
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TEST(library_tests, basic) {
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std::string path = android::base::GetExecutableDirectory() + "/libsharedtest.so";
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// The flags to loadLibrary should not include RTLD_GLOBAL or RTLD_NODELETE
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// which prevent unloading.
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std::shared_ptr<void> library = loadLibrary(path.c_str(), RTLD_LAZY);
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ASSERT_TRUE(library);
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ASSERT_EQ(1, library.use_count());
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std::shared_ptr<int32_t*> ptr = getObjectFromLibrary<int32_t*>("gPtr", library);
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ASSERT_TRUE(ptr);
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ASSERT_EQ(2, library.use_count());
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ASSERT_EQ(nullptr, *ptr); // original contents are nullptr.
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// There is a static object destructor in libsharedtest.so that will set the
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// contents of the integer pointer (if non-null) to 1 when called.
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// This is used to detect that the library is unloaded.
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*ptr = &here;
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ptr.reset(); // Note: this shared pointer uses library's refcount.
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ASSERT_EQ(1, library.use_count()); // Verify library's refcount goes down by 1.
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ASSERT_EQ(0, here); // the shared library's object destructor hasn't been called.
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// use weak_ptr to investigate whether the library is gone.
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std::weak_ptr<void> wlibrary = library;
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ASSERT_EQ(1, wlibrary.use_count());
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library.reset();
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// we should have released the last reference.
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ASSERT_EQ(0, wlibrary.use_count());
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// The library should unload and the global object destroyed.
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// Note on Android, specifying RTLD_GLOBAL or RTLD_NODELETE in the flags
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// will prevent unloading libraries.
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ASSERT_EQ(1, here);
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}
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TEST(library_tests, sad_library) {
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std::string path = android::base::GetExecutableDirectory()
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+ "/something_random_library_that_doesn't_exit.so";
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std::shared_ptr<void> library = loadLibrary(path.c_str(), RTLD_LAZY);
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// We shouldn't crash on an invalid library path, just return an empty shared pointer.
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// Check the logcat for any error details.
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ASSERT_FALSE(library);
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}
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} // namespace
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