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/*
* Copyright 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 <LogSize.h>
#include <array>
#include <optional>
#include <string>
#include <android-base/parseint.h>
#include <android-base/properties.h>
bool IsValidBufferSize(size_t value) {
return kLogBufferMinSize <= value && value <= kLogBufferMaxSize;
}
static std::optional<size_t> GetBufferSizeProperty(const std::string& key) {
std::string value = android::base::GetProperty(key, "");
if (value.empty()) {
return {};
}
uint32_t size;
if (!android::base::ParseByteCount(value, &size)) {
return {};
}
if (!IsValidBufferSize(size)) {
return {};
}
return size;
}
size_t GetBufferSizeFromProperties(log_id_t log_id) {
std::string buffer_name = android_log_id_to_name(log_id);
std::array<std::string, 4> properties = {
"persist.logd.size." + buffer_name,
"ro.logd.size." + buffer_name,
"persist.logd.size",
"ro.logd.size",
};
for (const auto& property : properties) {
if (auto size = GetBufferSizeProperty(property)) {
return *size;
}
}
if (android::base::GetBoolProperty("ro.config.low_ram", false)) {
return kLogBufferMinSize;
}
return kDefaultLogBufferSize;
}
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