| /* |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #include <stdatomic.h> |
| #include <stdint.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| |
| #include <log/log.h> |
| #include <sysutils/SocketClient.h> |
| |
| class LogBuffer; |
| class LogStatistics; |
| |
| #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 { |
| friend LogBuffer; |
| |
| // sized to match reality of incoming log packets |
| const uint32_t mUid; |
| const uint32_t mPid; |
| const uint32_t mTid; |
| uint64_t mSequence; |
| log_time mRealTime; |
| union { |
| char* mMsg; // mDropped == false |
| int32_t mTag; // mDropped == true |
| }; |
| union { |
| const uint16_t mMsgLen; // mDropped == false |
| uint16_t mDroppedCount; // mDropped == true |
| }; |
| const uint8_t mLogId; |
| bool mDropped; |
| |
| static atomic_int_fast64_t sequence; |
| |
| // assumption: mDropped == true |
| size_t populateDroppedMessage(char*& buffer, LogStatistics* 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, uint16_t len); |
| LogBufferElement(const LogBufferElement& elem); |
| ~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; |
| uint16_t getDropped(void) const { |
| return mDropped ? mDroppedCount : 0; |
| } |
| uint16_t setDropped(uint16_t value); |
| uint16_t getMsgLen() const { |
| return mDropped ? 0 : mMsgLen; |
| } |
| const char* getMsg() const { |
| return mDropped ? nullptr : mMsg; |
| } |
| uint64_t getSequence() const { return mSequence; } |
| static uint64_t getCurrentSequence() { return sequence.load(memory_order_relaxed); } |
| log_time getRealTime(void) const { |
| return mRealTime; |
| } |
| |
| static const uint64_t FLUSH_ERROR; |
| uint64_t flushTo(SocketClient* writer, LogStatistics* parent, bool lastSame); |
| }; |