emulator/opengl: refactor shared library handling.

+ Add a unit test.

Change-Id: I27c993d1dc819e5bd89fc1e9ae266e11e6ef9a76

1 files changed, 141 insertions, 0 deletions

diff --git a/emulator/opengl/shared/emugl/common/shared_library_unittest.cpp b/emulator/opengl/shared/emugl/common/shared_library_unittest.cpp
new file mode 100644
index 0000000..cec4c73
--- /dev/null
+++ b/emulator/opengl/shared/emugl/common/shared_library_unittest.cpp
@@ -0,0 +1,141 @@
+// Copyright (C) 2014 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 "emugl/common/shared_library.h"
+
+#include <gtest/gtest.h>
+
+#include <string>
+
+#include <limits.h>
+#include <string.h>
+
+// Hack to get the current executable's full path.
+namespace testing {
+namespace internal {
+
+extern std::string g_executable_path;
+
+}  // namespace internal
+}  // namespace testing
+
+namespace emugl {
+
+namespace {
+
+// Return the name/path of the test shared library to load.
+// Note that this doesn't include a platform-specific extension.
+// This assumes that the test shared library is under the lib/ sub-directory
+// of the current executable's path!
+std::string GetTestLibraryName() {
+    static const char kSubDir[] = "lib/";
+#ifdef __x86_64__
+    static const char kLibraryPrefix[] = "lib64";
+#else
+    static const char kLibraryPrefix[] = "lib";
+#endif
+    static const char kTestLibrarySuffix[] = "emugl_test_shared_library";
+
+    const char* exec_path = testing::internal::g_executable_path.c_str();
+
+#ifdef _WIN32
+    const char* p = strrchr(exec_path, '/');
+    const char* p2 = strrchr(exec_path, '\\');
+    if (p2) {
+        if (!p || p2 > p) {
+            p = p2;
+        }
+    }
+#else
+    const char* p = strrchr(exec_path, '/');
+#endif
+
+    std::string path;
+
+    if (!p) {
+        path = "./";
+    } else {
+        path = std::string(exec_path, p - exec_path + 1U);
+    }
+    path += kSubDir;
+    path += kLibraryPrefix;
+    path += kTestLibrarySuffix;
+    printf("Library path: %s\n", path.c_str());
+    return path;
+}
+
+class SharedLibraryTest : public testing::Test {
+public:
+    SharedLibraryTest() {
+        // Locate the shared library
+        mLibraryPath = GetTestLibraryName();
+    }
+
+    ~SharedLibraryTest() {}
+
+    const char* library_path() const { return mLibraryPath.c_str(); }
+
+private:
+    std::string mLibraryPath;
+};
+
+class ScopedSharedLibrary {
+public:
+    explicit ScopedSharedLibrary(SharedLibrary* lib) : mLib(lib) {}
+    ~ScopedSharedLibrary() {
+        delete mLib;
+    }
+    SharedLibrary* get() const { return mLib; }
+
+    SharedLibrary* operator->() { return mLib; }
+
+private:
+    SharedLibrary* mLib;
+};
+
+}  // namespace
+
+TEST_F(SharedLibraryTest, Open) {
+    ScopedSharedLibrary lib(SharedLibrary::open(library_path()));
+    EXPECT_TRUE(lib.get());
+}
+
+TEST_F(SharedLibraryTest, OpenWithExtension) {
+    std::string path = library_path();
+#ifdef _WIN32
+    path += ".dll";
+#elif defined(__APPLE__)
+    path += ".dylib";
+#else
+    path += ".so";
+#endif
+    ScopedSharedLibrary lib(SharedLibrary::open(path.c_str()));
+    EXPECT_TRUE(lib.get());
+}
+
+TEST_F(SharedLibraryTest, FindSymbol) {
+    ScopedSharedLibrary lib(SharedLibrary::open(library_path()));
+    EXPECT_TRUE(lib.get());
+
+    if (lib.get()) {
+        typedef int (*FooFunction)(void);
+
+        FooFunction foo_func = reinterpret_cast<FooFunction>(
+                lib->findSymbol("foo_function"));
+        EXPECT_TRUE(foo_func);
+        EXPECT_EQ(42, (*foo_func)());
+    }
+}
+
+}  // namespace emugl