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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 "daemon/logging.h"
#include <mutex>
#include <optional>
#include <string_view>
#include <android-base/no_destructor.h>
#include <android-base/properties.h>
#include <android-base/strings.h>
#include <android-base/thread_annotations.h>
#if defined(__ANDROID__)
struct LogStatus {
bool enabled[static_cast<size_t>(adb::LogType::COUNT)];
bool& operator[](adb::LogType type) { return enabled[static_cast<size_t>(type)]; }
};
using android::base::CachedProperty;
using android::base::NoDestructor;
static NoDestructor<std::mutex> log_mutex;
static NoDestructor<CachedProperty> log_property GUARDED_BY(log_mutex)("debug.adbd.logging");
static std::optional<LogStatus> cached_log_status GUARDED_BY(log_mutex);
static NoDestructor<CachedProperty> persist_log_property
GUARDED_BY(log_mutex)("persist.debug.adbd.logging");
static std::optional<LogStatus> cached_persist_log_status GUARDED_BY(log_mutex);
static LogStatus ParseLogStatus(std::string_view str) {
LogStatus result = {};
for (const auto& part : android::base::Split(std::string(str), ",")) {
if (part == "cnxn") {
result[adb::LogType::Connection] = true;
} else if (part == "service") {
result[adb::LogType::Service] = true;
} else if (part == "shell") {
result[adb::LogType::Shell] = true;
} else if (part == "all") {
result[adb::LogType::Connection] = true;
result[adb::LogType::Service] = true;
result[adb::LogType::Shell] = true;
}
}
return result;
}
static LogStatus GetLogStatus(android::base::CachedProperty* property,
std::optional<LogStatus>* cached_status) REQUIRES(log_mutex) {
bool changed;
const char* value = property->Get(&changed);
if (changed || !*cached_status) {
**cached_status = ParseLogStatus(value);
}
return **cached_status;
}
namespace adb {
bool is_logging_enabled(LogType type) {
std::lock_guard<std::mutex> lock(*log_mutex);
return GetLogStatus(log_property.get(), &cached_log_status)[type] ||
GetLogStatus(persist_log_property.get(), &cached_persist_log_status)[type];
}
} // namespace adb
#else
namespace adb {
bool is_logging_enabled(LogType type) {
return false;
}
} // namespace adb
#endif
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