106 lines
2.8 KiB
C++
106 lines
2.8 KiB
C++
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/*
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* Copyright (c) 2010 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/audio_device/linux/latebindingsymboltable_linux.h"
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#include "rtc_base/logging.h"
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#ifdef WEBRTC_LINUX
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#include <dlfcn.h>
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#endif
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namespace webrtc {
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namespace adm_linux {
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inline static const char* GetDllError() {
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#ifdef WEBRTC_LINUX
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char* err = dlerror();
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if (err) {
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return err;
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} else {
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return "No error";
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}
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#else
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#error Not implemented
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#endif
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}
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DllHandle InternalLoadDll(const char dll_name[]) {
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#ifdef WEBRTC_LINUX
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DllHandle handle = dlopen(dll_name, RTLD_NOW);
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#else
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#error Not implemented
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#endif
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if (handle == kInvalidDllHandle) {
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RTC_LOG(LS_WARNING) << "Can't load " << dll_name << " : " << GetDllError();
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}
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return handle;
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}
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void InternalUnloadDll(DllHandle handle) {
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#ifdef WEBRTC_LINUX
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// TODO(pbos): Remove this dlclose() exclusion when leaks and suppressions from
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// here are gone (or AddressSanitizer can display them properly).
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//
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// Skip dlclose() on AddressSanitizer as leaks including this module in the
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// stack trace gets displayed as <unknown module> instead of the actual library
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// -> it can not be suppressed.
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// https://code.google.com/p/address-sanitizer/issues/detail?id=89
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#if !defined(ADDRESS_SANITIZER)
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if (dlclose(handle) != 0) {
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RTC_LOG(LS_ERROR) << GetDllError();
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}
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#endif // !defined(ADDRESS_SANITIZER)
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#else
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#error Not implemented
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#endif
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}
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static bool LoadSymbol(DllHandle handle,
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const char* symbol_name,
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void** symbol) {
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#ifdef WEBRTC_LINUX
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*symbol = dlsym(handle, symbol_name);
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char* err = dlerror();
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if (err) {
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RTC_LOG(LS_ERROR) << "Error loading symbol " << symbol_name << " : " << err;
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return false;
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} else if (!*symbol) {
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RTC_LOG(LS_ERROR) << "Symbol " << symbol_name << " is NULL";
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return false;
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}
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return true;
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#else
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#error Not implemented
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#endif
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}
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// This routine MUST assign SOME value for every symbol, even if that value is
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// NULL, or else some symbols may be left with uninitialized data that the
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// caller may later interpret as a valid address.
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bool InternalLoadSymbols(DllHandle handle,
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int num_symbols,
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const char* const symbol_names[],
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void* symbols[]) {
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#ifdef WEBRTC_LINUX
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// Clear any old errors.
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dlerror();
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#endif
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for (int i = 0; i < num_symbols; ++i) {
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if (!LoadSymbol(handle, symbol_names[i], &symbols[i])) {
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return false;
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}
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}
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return true;
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}
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} // namespace adm_linux
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} // namespace webrtc
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