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/*
* Copyright (c) 2010 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/modules/audio_device/linux/latebindingsymboltable_linux.h"
#ifdef WEBRTC_LINUX
#include <dlfcn.h>
#endif
// TODO(grunell): Either put inside webrtc namespace or use webrtc:: instead.
using namespace webrtc;
namespace webrtc_adm_linux {
inline static const char *GetDllError() {
#ifdef WEBRTC_LINUX
char *err = dlerror();
if (err) {
return err;
} else {
return "No error";
}
#else
#error Not implemented
#endif
}
DllHandle InternalLoadDll(const char dll_name[]) {
#ifdef WEBRTC_LINUX
DllHandle handle = dlopen(dll_name, RTLD_NOW);
#else
#error Not implemented
#endif
if (handle == kInvalidDllHandle) {
WEBRTC_TRACE(kTraceWarning, kTraceAudioDevice, -1,
"Can't load %s : %s", dll_name, GetDllError());
}
return handle;
}
void InternalUnloadDll(DllHandle handle) {
#ifdef WEBRTC_LINUX
// TODO(pbos): Remove this dlclose() exclusion when leaks and suppressions from
// here are gone (or AddressSanitizer can display them properly).
//
// Skip dlclose() on AddressSanitizer as leaks including this module in the
// stack trace gets displayed as <unknown module> instead of the actual library
// -> it can not be suppressed.
// https://code.google.com/p/address-sanitizer/issues/detail?id=89
#if !defined(ADDRESS_SANITIZER)
if (dlclose(handle) != 0) {
WEBRTC_TRACE(kTraceError, kTraceAudioDevice, -1,
"%s", GetDllError());
}
#endif // !defined(ADDRESS_SANITIZER)
#else
#error Not implemented
#endif
}
static bool LoadSymbol(DllHandle handle,
const char *symbol_name,
void **symbol) {
#ifdef WEBRTC_LINUX
*symbol = dlsym(handle, symbol_name);
char *err = dlerror();
if (err) {
WEBRTC_TRACE(kTraceError, kTraceAudioDevice, -1,
"Error loading symbol %s : %d", symbol_name, err);
return false;
} else if (!*symbol) {
WEBRTC_TRACE(kTraceError, kTraceAudioDevice, -1,
"Symbol %s is NULL", symbol_name);
return false;
}
return true;
#else
#error Not implemented
#endif
}
// This routine MUST assign SOME value for every symbol, even if that value is
// NULL, or else some symbols may be left with uninitialized data that the
// caller may later interpret as a valid address.
bool InternalLoadSymbols(DllHandle handle,
int num_symbols,
const char *const symbol_names[],
void *symbols[]) {
#ifdef WEBRTC_LINUX
// Clear any old errors.
dlerror();
#endif
for (int i = 0; i < num_symbols; ++i) {
if (!LoadSymbol(handle, symbol_names[i], &symbols[i])) {
return false;
}
}
return true;
}
} // namespace webrtc_adm_linux
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