71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/native_library.h"
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#include <dlfcn.h>
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#include "base/files/file_path.h"
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#include "base/logging.h"
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#include "base/strings/string_util.h"
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#include "base/strings/utf_string_conversions.h"
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#include "base/threading/scoped_blocking_call.h"
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namespace base {
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std::string NativeLibraryLoadError::ToString() const {
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return message;
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}
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NativeLibrary LoadNativeLibraryWithOptions(const FilePath& library_path,
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const NativeLibraryOptions& options,
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NativeLibraryLoadError* error) {
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// dlopen() opens the file off disk.
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ScopedBlockingCall scoped_blocking_call(FROM_HERE, BlockingType::MAY_BLOCK);
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// We deliberately do not use RTLD_DEEPBIND by default. For the history why,
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// please refer to the bug tracker. Some useful bug reports to read include:
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// http://crbug.com/17943, http://crbug.com/17557, http://crbug.com/36892,
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// and http://crbug.com/40794.
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int flags = RTLD_LAZY;
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#if defined(OS_ANDROID) || !defined(RTLD_DEEPBIND)
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// Certain platforms don't define RTLD_DEEPBIND. Android dlopen() requires
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// further investigation, as it might vary across versions. Crash here to
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// warn developers that they're trying to rely on uncertain behavior.
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CHECK(!options.prefer_own_symbols);
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#else
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if (options.prefer_own_symbols)
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flags |= RTLD_DEEPBIND;
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#endif
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void* dl = dlopen(library_path.value().c_str(), flags);
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if (!dl && error)
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error->message = dlerror();
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return dl;
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}
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void UnloadNativeLibrary(NativeLibrary library) {
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int ret = dlclose(library);
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if (ret < 0) {
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DLOG(ERROR) << "dlclose failed: " << dlerror();
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NOTREACHED();
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}
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}
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void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
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StringPiece name) {
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return dlsym(library, name.data());
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}
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std::string GetNativeLibraryName(StringPiece name) {
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DCHECK(IsStringASCII(name));
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return "lib" + name.as_string() + ".so";
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}
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std::string GetLoadableModuleName(StringPiece name) {
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return GetNativeLibraryName(name);
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}
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} // namespace base
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