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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/native_library.h" | 5 #include "base/native_library.h" |
6 | 6 |
7 #include <dlfcn.h> | 7 #include <dlfcn.h> |
8 | 8 |
9 #include "base/files/file_path.h" | 9 #include "base/files/file_path.h" |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
11 #include "base/strings/string_util.h" | 11 #include "base/strings/string_util.h" |
12 #include "base/strings/utf_string_conversions.h" | 12 #include "base/strings/utf_string_conversions.h" |
13 #include "base/threading/thread_restrictions.h" | 13 #include "base/threading/thread_restrictions.h" |
14 | 14 |
15 namespace base { | 15 namespace base { |
16 | 16 |
17 std::string NativeLibraryLoadError::ToString() const { | 17 std::string NativeLibraryLoadError::ToString() const { |
18 return message; | 18 return message; |
19 } | 19 } |
20 | 20 |
21 // static | 21 // static |
22 NativeLibrary LoadNativeLibrary(const FilePath& library_path, | 22 NativeLibrary LoadNativeLibraryWithOptions(const FilePath& library_path, |
23 NativeLibraryLoadError* error) { | 23 const NativeLibraryOptions& options, |
24 NativeLibraryLoadError* error) { | |
24 // dlopen() opens the file off disk. | 25 // dlopen() opens the file off disk. |
25 ThreadRestrictions::AssertIOAllowed(); | 26 ThreadRestrictions::AssertIOAllowed(); |
26 | 27 |
27 // We deliberately do not use RTLD_DEEPBIND. For the history why, please | 28 // We deliberately do not use RTLD_DEEPBIND by default. For the history why, |
28 // refer to the bug tracker. Some useful bug reports to read include: | 29 // please refer to the bug tracker. Some useful bug reports to read include: |
29 // http://crbug.com/17943, http://crbug.com/17557, http://crbug.com/36892, | 30 // http://crbug.com/17943, http://crbug.com/17557, http://crbug.com/36892, |
30 // and http://crbug.com/40794. | 31 // and http://crbug.com/40794. |
31 void* dl = dlopen(library_path.value().c_str(), RTLD_LAZY); | 32 int flags = RTLD_LAZY; |
33 #if defined(OS_ANDROID) | |
34 // Android dlopen() behavior is not well specified and may vary across | |
Primiano Tucci (use gerrit)
2016/08/25 21:10:53
I'd make this a bit softer and say: "dlopen() beha
Ken Rockot(use gerrit already)
2016/08/25 21:25:01
Done
| |
35 // versions. Crash here to warn developers that they're trying to rely on | |
36 // undefined behavior. | |
37 CHECK(!options.prefer_own_symbols); | |
38 #else | |
39 if (options.prefer_own_symbols) | |
40 flags |= RTLD_DEEPBIND; | |
41 #endif | |
42 void* dl = dlopen(library_path.value().c_str(), flags); | |
32 if (!dl && error) | 43 if (!dl && error) |
33 error->message = dlerror(); | 44 error->message = dlerror(); |
34 | 45 |
35 return dl; | 46 return dl; |
36 } | 47 } |
37 | 48 |
38 // static | 49 // static |
39 void UnloadNativeLibrary(NativeLibrary library) { | 50 void UnloadNativeLibrary(NativeLibrary library) { |
40 int ret = dlclose(library); | 51 int ret = dlclose(library); |
41 if (ret < 0) { | 52 if (ret < 0) { |
42 DLOG(ERROR) << "dlclose failed: " << dlerror(); | 53 DLOG(ERROR) << "dlclose failed: " << dlerror(); |
43 NOTREACHED(); | 54 NOTREACHED(); |
44 } | 55 } |
45 } | 56 } |
46 | 57 |
47 // static | 58 // static |
48 void* GetFunctionPointerFromNativeLibrary(NativeLibrary library, | 59 void* GetFunctionPointerFromNativeLibrary(NativeLibrary library, |
49 StringPiece name) { | 60 StringPiece name) { |
50 return dlsym(library, name.data()); | 61 return dlsym(library, name.data()); |
51 } | 62 } |
52 | 63 |
53 // static | 64 // static |
54 std::string GetNativeLibraryName(StringPiece name) { | 65 std::string GetNativeLibraryName(StringPiece name) { |
55 DCHECK(IsStringASCII(name)); | 66 DCHECK(IsStringASCII(name)); |
56 return "lib" + name.as_string() + ".so"; | 67 return "lib" + name.as_string() + ".so"; |
57 } | 68 } |
58 | 69 |
59 } // namespace base | 70 } // namespace base |
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