blob: b263ca5375101f5ced78104e9f5a98a0d1282e9f [file] [log] [blame]
* Copyright (C) 2012-2014 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#pragma once
#include <stdint.h>
#include <stdlib.h>
#include <sys/types.h>
#include <log/log.h>
#include "LogWriter.h"
#include "LogStatistics.h"
#define EXPIRE_HOUR_THRESHOLD 24 // Only expire chatty UID logs to preserve
// non-chatty UIDs less than this age in hours
#define EXPIRE_THRESHOLD 10 // A smaller expire count is considered too
// chatty for the temporal expire messages
#define EXPIRE_RATELIMIT 10 // maximum rate in seconds to report expiration
class __attribute__((packed)) LogBufferElement {
LogBufferElement(log_id_t log_id, log_time realtime, uid_t uid, pid_t pid, pid_t tid,
uint64_t sequence, const char* msg, uint16_t len);
LogBufferElement(const LogBufferElement& elem);
LogBufferElement(LogBufferElement&& elem) noexcept;
uint32_t GetTag() const;
uint16_t SetDropped(uint16_t value);
bool FlushTo(LogWriter* writer, LogStatistics* parent, bool lastSame);
LogStatisticsElement ToLogStatisticsElement() const;
log_id_t log_id() const { return static_cast<log_id_t>(log_id_); }
uid_t uid() const { return uid_; }
pid_t pid() const { return pid_; }
pid_t tid() const { return tid_; }
uint16_t msg_len() const { return dropped_ ? 0 : msg_len_; }
const char* msg() const { return dropped_ ? nullptr : msg_; }
uint64_t sequence() const { return sequence_; }
log_time realtime() const { return realtime_; }
uint16_t dropped_count() const { return dropped_ ? dropped_count_ : 0; }
// assumption: mDropped == true
size_t PopulateDroppedMessage(char*& buffer, LogStatistics* parent, bool lastSame);
// sized to match reality of incoming log packets
const uint32_t uid_;
const uint32_t pid_;
const uint32_t tid_;
uint64_t sequence_;
log_time realtime_;
union {
char* msg_; // mDropped == false
int32_t tag_; // mDropped == true
union {
const uint16_t msg_len_; // mDropped == false
uint16_t dropped_count_; // mDropped == true
const uint8_t log_id_;
bool dropped_;