| // 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 <dlfcn.h> |
| |
| #include "base/files/file_path.h" |
| #include "base/logging.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/threading/scoped_blocking_call.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 defined(OS_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 "lib" + name.as_string() + ".so"; |
| } |
| |
| std::string GetLoadableModuleName(StringPiece name) { |
| return GetNativeLibraryName(name); |
| } |
| |
| } // namespace base |