1 // Copyright 2011 The Chromium Authors
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 "partition_alloc/partition_alloc_base/native_library.h"
6
7 #include <dlfcn.h>
8
9 #include "build/build_config.h"
10 #include "partition_alloc/partition_alloc_base/check.h"
11 #include "partition_alloc/partition_alloc_base/files/file_path.h"
12
13 namespace partition_alloc::internal::base {
14
ToString() const15 std::string NativeLibraryLoadError::ToString() const {
16 return message;
17 }
18
LoadNativeLibraryWithOptions(const FilePath & library_path,const NativeLibraryOptions & options,NativeLibraryLoadError * error)19 NativeLibrary LoadNativeLibraryWithOptions(const FilePath& library_path,
20 const NativeLibraryOptions& options,
21 NativeLibraryLoadError* error) {
22 // TODO(1151236): Temporarily disable this ScopedBlockingCall. After making
23 // partition_alloc ScopedBlockingCall() to see the same blocking_observer_
24 // in base's ScopedBlockingCall(), we will copy ScopedBlockingCall code and
25 // will enable this.
26
27 // dlopen() opens the file off disk.
28 // ScopedBlockingCall scoped_blocking_call(BlockingType::MAY_BLOCK);
29
30 // We deliberately do not use RTLD_DEEPBIND by default. For the history why,
31 // please refer to the bug tracker. Some useful bug reports to read include:
32 // http://crbug.com/17943, http://crbug.com/17557, http://crbug.com/36892,
33 // and http://crbug.com/40794.
34 int flags = RTLD_LAZY;
35 #if BUILDFLAG(IS_ANDROID) || !defined(RTLD_DEEPBIND)
36 // Certain platforms don't define RTLD_DEEPBIND. Android dlopen() requires
37 // further investigation, as it might vary across versions. Crash here to
38 // warn developers that they're trying to rely on uncertain behavior.
39 PA_BASE_CHECK(!options.prefer_own_symbols);
40 #else
41 if (options.prefer_own_symbols) {
42 flags |= RTLD_DEEPBIND;
43 }
44 #endif
45 void* dl = dlopen(library_path.value().c_str(), flags);
46 if (!dl && error) {
47 error->message = dlerror();
48 }
49
50 return dl;
51 }
52
GetFunctionPointerFromNativeLibrary(NativeLibrary library,const std::string & name)53 void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
54 const std::string& name) {
55 return dlsym(library, name.c_str());
56 }
57
58 } // namespace partition_alloc::internal::base
59