// Copyright (c) 2011 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "base/native_library.h" #include #include "base/files/file_path.h" #include "base/logging.h" #include "base/notreached.h" #include "base/strings/strcat.h" #include "base/strings/string_piece.h" #include "base/strings/string_util.h" #include "base/strings/utf_string_conversions.h" #include "base/threading/scoped_blocking_call.h" #include "build/build_config.h" namespace base { std::string NativeLibraryLoadError::ToString() const { return message; } NativeLibrary LoadNativeLibraryWithOptions(const FilePath& library_path, const NativeLibraryOptions& options, NativeLibraryLoadError* error) { // dlopen() opens the file off disk. ScopedBlockingCall scoped_blocking_call(FROM_HERE, BlockingType::MAY_BLOCK); // We deliberately do not use RTLD_DEEPBIND by default. For the history why, // please refer to the bug tracker. Some useful bug reports to read include: // http://crbug.com/17943, http://crbug.com/17557, http://crbug.com/36892, // and http://crbug.com/40794. int flags = RTLD_LAZY; #if BUILDFLAG(IS_ANDROID) || !defined(RTLD_DEEPBIND) // Certain platforms don't define RTLD_DEEPBIND. Android dlopen() requires // further investigation, as it might vary across versions. Crash here to // warn developers that they're trying to rely on uncertain behavior. CHECK(!options.prefer_own_symbols); #else if (options.prefer_own_symbols) flags |= RTLD_DEEPBIND; #endif void* dl = dlopen(library_path.value().c_str(), flags); if (!dl && error) error->message = dlerror(); return dl; } void UnloadNativeLibrary(NativeLibrary library) { int ret = dlclose(library); if (ret < 0) { DLOG(ERROR) << "dlclose failed: " << dlerror(); NOTREACHED(); } } void* GetFunctionPointerFromNativeLibrary(NativeLibrary library, StringPiece name) { return dlsym(library, name.data()); } std::string GetNativeLibraryName(StringPiece name) { DCHECK(IsStringASCII(name)); return StrCat({"lib", name, ".so"}); } std::string GetLoadableModuleName(StringPiece name) { return GetNativeLibraryName(name); } } // namespace base