69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
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/*
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* Copyright 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <LogSize.h>
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#include <array>
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#include <optional>
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#include <string>
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#include <android-base/parseint.h>
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#include <android-base/properties.h>
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bool IsValidBufferSize(size_t value) {
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return kLogBufferMinSize <= value && value <= kLogBufferMaxSize;
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}
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static std::optional<size_t> GetBufferSizeProperty(const std::string& key) {
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std::string value = android::base::GetProperty(key, "");
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if (value.empty()) {
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return {};
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}
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uint32_t size;
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if (!android::base::ParseByteCount(value, &size)) {
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return {};
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}
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if (!IsValidBufferSize(size)) {
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return {};
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}
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return size;
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}
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size_t GetBufferSizeFromProperties(log_id_t log_id) {
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std::string buffer_name = android_log_id_to_name(log_id);
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std::array<std::string, 4> properties = {
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"persist.logd.size." + buffer_name,
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"ro.logd.size." + buffer_name,
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"persist.logd.size",
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"ro.logd.size",
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};
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for (const auto& property : properties) {
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if (auto size = GetBufferSizeProperty(property)) {
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return *size;
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}
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}
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if (android::base::GetBoolProperty("ro.config.low_ram", false)) {
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return kLogBufferMinSize;
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}
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return kDefaultLogBufferSize;
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}
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