ec39a3f6df
To profile different log buffer types and configuration, this change adds the ability to record log messages and adds a tool that will replay those log messages through different log buffer implementations and collect stats about the execution. Test: log messages replay correctly Change-Id: I0dc6c545b782fa7732e325dde109c496b137d0dd
62 lines
No EOL
2.3 KiB
C++
62 lines
No EOL
2.3 KiB
C++
/*
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* Copyright (C) 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 "RecordingLogBuffer.h"
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#include <android-base/file.h>
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static void WriteLogMessage(int fd, const RecordedLogMessage& meta, const std::string& msg) {
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android::base::WriteFully(fd, &meta, sizeof(meta));
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android::base::WriteFully(fd, msg.c_str(), meta.msg_len);
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}
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void RecordingLogBuffer::RecordLogMessage(log_id_t log_id, log_time realtime, uid_t uid, pid_t pid,
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pid_t tid, const char* msg, uint16_t len) {
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auto lock = std::lock_guard{lock_};
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if (len > LOGGER_ENTRY_MAX_PAYLOAD) {
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len = LOGGER_ENTRY_MAX_PAYLOAD;
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}
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RecordedLogMessage recorded_log_message = {
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.uid = uid,
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.pid = static_cast<uint32_t>(pid),
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.tid = static_cast<uint32_t>(tid),
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.realtime = realtime,
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.msg_len = len,
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.log_id = static_cast<uint8_t>(log_id),
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};
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if (!fd_.ok()) {
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fd_.reset(open("/data/misc/logd/recorded-messages",
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O_WRONLY | O_CREAT | O_APPEND | O_CLOEXEC, 0666));
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if (!fd_.ok()) {
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since_boot_messages_.emplace_back(recorded_log_message, std::string(msg, len));
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return;
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} else {
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for (const auto& [meta, msg] : since_boot_messages_) {
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WriteLogMessage(fd_.get(), meta, msg);
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}
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}
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}
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WriteLogMessage(fd_.get(), recorded_log_message, std::string(msg, len));
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}
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int RecordingLogBuffer::Log(log_id_t log_id, log_time realtime, uid_t uid, pid_t pid, pid_t tid,
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const char* msg, uint16_t len) {
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RecordLogMessage(log_id, realtime, uid, pid, tid, msg, len);
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return SimpleLogBuffer::Log(log_id, realtime, uid, pid, tid, msg, len);
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} |