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/files/file_path.h"
10 #include "base/logging.h"
11 #include "base/strings/utf_string_conversions.h"
12 #include "base/threading/thread_restrictions.h"
13
14 namespace base {
15
ToString() const16 std::string NativeLibraryLoadError::ToString() const {
17 return message;
18 }
19
20 // static
LoadNativeLibrary(const FilePath & library_path,NativeLibraryLoadError * error)21 NativeLibrary LoadNativeLibrary(const FilePath& library_path,
22 NativeLibraryLoadError* error) {
23 // dlopen() opens the file off disk.
24 base::ThreadRestrictions::AssertIOAllowed();
25
26 // We deliberately do not use RTLD_DEEPBIND. For the history why, please
27 // refer to the bug tracker. Some useful bug reports to read include:
28 // http://crbug.com/17943, http://crbug.com/17557, http://crbug.com/36892,
29 // and http://crbug.com/40794.
30 void* dl = dlopen(library_path.value().c_str(), RTLD_LAZY);
31 if (!dl && error)
32 error->message = dlerror();
33
34 return dl;
35 }
36
37 // static
UnloadNativeLibrary(NativeLibrary library)38 void UnloadNativeLibrary(NativeLibrary library) {
39 int ret = dlclose(library);
40 if (ret < 0) {
41 DLOG(ERROR) << "dlclose failed: " << dlerror();
42 NOTREACHED();
43 }
44 }
45
46 // static
GetFunctionPointerFromNativeLibrary(NativeLibrary library,const char * name)47 void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
48 const char* name) {
49 return dlsym(library, name);
50 }
51
52 // static
GetNativeLibraryName(const string16 & name)53 string16 GetNativeLibraryName(const string16& name) {
54 return ASCIIToUTF16("lib") + name + ASCIIToUTF16(".so");
55 }
56
57 } // namespace base
58