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/*
* 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
*
* 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.
*/
#ifndef _LOGD_LOG_BUFFER_ELEMENT_H__
#define _LOGD_LOG_BUFFER_ELEMENT_H__
#include <stdatomic.h>
#include <stdlib.h>
#include <sys/types.h>
#include <log/log.h>
#include <sysutils/SocketClient.h>
class LogBuffer;
#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 LogBufferElement {
friend LogBuffer;
// sized to match reality of incoming log packets
uint32_t mTag; // only valid for isBinary()
const uint32_t mUid;
const uint32_t mPid;
const uint32_t mTid;
const uint64_t mSequence;
log_time mRealTime;
char *mMsg;
union {
const uint16_t mMsgLen; // mMSg != NULL
uint16_t mDropped; // mMsg == NULL
};
const uint8_t mLogId;
static atomic_int_fast64_t sequence;
// assumption: mMsg == NULL
size_t populateDroppedMessage(char*& buffer,
LogBuffer* parent,
bool lastSame);
public:
LogBufferElement(log_id_t log_id, log_time realtime,
uid_t uid, pid_t pid, pid_t tid,
const char *msg, unsigned short len);
LogBufferElement(const LogBufferElement &elem);
virtual ~LogBufferElement();
bool isBinary(void) const {
return (mLogId == LOG_ID_EVENTS) || (mLogId == LOG_ID_SECURITY);
}
log_id_t getLogId() const { return static_cast<log_id_t>(mLogId); }
uid_t getUid(void) const { return mUid; }
pid_t getPid(void) const { return mPid; }
pid_t getTid(void) const { return mTid; }
uint32_t getTag() const { return mTag; }
unsigned short getDropped(void) const { return mMsg ? 0 : mDropped; }
unsigned short setDropped(unsigned short value) {
if (mMsg) {
delete [] mMsg;
mMsg = NULL;
}
return mDropped = value;
}
unsigned short getMsgLen() const { return mMsg ? mMsgLen : 0; }
const char* getMsg() const { return mMsg; }
uint64_t getSequence(void) const { return mSequence; }
static uint64_t getCurrentSequence(void) { return sequence.load(memory_order_relaxed); }
log_time getRealTime(void) const { return mRealTime; }
static const uint64_t FLUSH_ERROR;
uint64_t flushTo(SocketClient* writer, LogBuffer* parent,
bool privileged, bool lastSame);
};
#endif
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