1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/native_library.h" 6 7 #include <dlfcn.h> 8 9 #include "base/file_path.h" 10 #include "base/logging.h" 11 #include "base/threading/thread_restrictions.h" 12 #include "base/utf_string_conversions.h" 13 14 namespace base { 15 16 // static 17 NativeLibrary LoadNativeLibrary(const FilePath& library_path, 18 std::string* error) { 19 // dlopen() opens the file off disk. 20 base::ThreadRestrictions::AssertIOAllowed(); 21 22 // We deliberately do not use RTLD_DEEPBIND. For the history why, please 23 // refer to the bug tracker. Some useful bug reports to read include: 24 // http://crbug.com/17943, http://crbug.com/17557, http://crbug.com/36892, 25 // and http://crbug.com/40794. 26 void* dl = dlopen(library_path.value().c_str(), RTLD_LAZY); 27 if (!dl && error) 28 *error = dlerror(); 29 30 return dl; 31 } 32 33 // static 34 void UnloadNativeLibrary(NativeLibrary library) { 35 int ret = dlclose(library); 36 if (ret < 0) { 37 LOG(ERROR) << "dlclose failed: " << dlerror(); 38 NOTREACHED(); 39 } 40 } 41 42 // static 43 void* GetFunctionPointerFromNativeLibrary(NativeLibrary library, 44 const char* name) { 45 return dlsym(library, name); 46 } 47 48 // static 49 string16 GetNativeLibraryName(const string16& name) { 50 return ASCIIToUTF16("lib") + name + ASCIIToUTF16(".so"); 51 } 52 53 } // namespace base 54
