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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "liblog_symbols.h"
#if defined(__ANDROID_SDK_VERSION__) && (__ANDROID_SDK_VERSION__ <= 29)
#define USE_DLSYM
#endif
#ifdef USE_DLSYM
#include <dlfcn.h>
#endif
namespace android {
namespace base {
#ifdef USE_DLSYM
const std::optional<LibLogFunctions>& GetLibLogFunctions() {
static std::optional<LibLogFunctions> liblog_functions = []() -> std::optional<LibLogFunctions> {
void* liblog_handle = dlopen("liblog.so", RTLD_NOW);
if (liblog_handle == nullptr) {
return {};
}
LibLogFunctions real_liblog_functions = {};
#define DLSYM(name) \
real_liblog_functions.name = \
reinterpret_cast<decltype(LibLogFunctions::name)>(dlsym(liblog_handle, #name)); \
if (real_liblog_functions.name == nullptr) { \
return {}; \
}
DLSYM(__android_log_set_logger)
DLSYM(__android_log_write_log_message)
DLSYM(__android_log_logd_logger)
DLSYM(__android_log_stderr_logger)
DLSYM(__android_log_set_aborter)
DLSYM(__android_log_call_aborter)
DLSYM(__android_log_default_aborter)
DLSYM(__android_log_set_minimum_priority);
DLSYM(__android_log_get_minimum_priority);
DLSYM(__android_log_set_default_tag);
#undef DLSYM
return real_liblog_functions;
}();
return liblog_functions;
}
#else
const std::optional<LibLogFunctions>& GetLibLogFunctions() {
static std::optional<LibLogFunctions> liblog_functions = []() -> std::optional<LibLogFunctions> {
return LibLogFunctions{
.__android_log_set_logger = __android_log_set_logger,
.__android_log_write_log_message = __android_log_write_log_message,
.__android_log_logd_logger = __android_log_logd_logger,
.__android_log_stderr_logger = __android_log_stderr_logger,
.__android_log_set_aborter = __android_log_set_aborter,
.__android_log_call_aborter = __android_log_call_aborter,
.__android_log_default_aborter = __android_log_default_aborter,
.__android_log_set_minimum_priority = __android_log_set_minimum_priority,
.__android_log_get_minimum_priority = __android_log_get_minimum_priority,
.__android_log_set_default_tag = __android_log_set_default_tag,
};
}();
return liblog_functions;
}
#endif
} // namespace base
} // namespace android
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