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81 lines
2.8 KiB
81 lines
2.8 KiB
/*
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* Copyright (C) 2012-2014 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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#pragma once
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#include <stdint.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <log/log.h>
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#include "LogWriter.h"
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#include "LogStatistics.h"
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#define EXPIRE_HOUR_THRESHOLD 24 // Only expire chatty UID logs to preserve
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// non-chatty UIDs less than this age in hours
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#define EXPIRE_THRESHOLD 10 // A smaller expire count is considered too
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// chatty for the temporal expire messages
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#define EXPIRE_RATELIMIT 10 // maximum rate in seconds to report expiration
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class __attribute__((packed)) LogBufferElement {
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public:
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LogBufferElement(log_id_t log_id, log_time realtime, uid_t uid, pid_t pid, pid_t tid,
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uint64_t sequence, const char* msg, uint16_t len);
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LogBufferElement(const LogBufferElement& elem);
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LogBufferElement(LogBufferElement&& elem) noexcept;
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~LogBufferElement();
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uint32_t GetTag() const;
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uint16_t SetDropped(uint16_t value);
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bool FlushTo(LogWriter* writer, LogStatistics* parent, bool lastSame);
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LogStatisticsElement ToLogStatisticsElement() const;
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log_id_t log_id() const { return static_cast<log_id_t>(log_id_); }
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uid_t uid() const { return uid_; }
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pid_t pid() const { return pid_; }
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pid_t tid() const { return tid_; }
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uint16_t msg_len() const { return dropped_ ? 0 : msg_len_; }
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const char* msg() const { return dropped_ ? nullptr : msg_; }
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uint64_t sequence() const { return sequence_; }
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log_time realtime() const { return realtime_; }
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uint16_t dropped_count() const { return dropped_ ? dropped_count_ : 0; }
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private:
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// assumption: mDropped == true
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size_t PopulateDroppedMessage(char*& buffer, LogStatistics* parent, bool lastSame);
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// sized to match reality of incoming log packets
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const uint32_t uid_;
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const uint32_t pid_;
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const uint32_t tid_;
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uint64_t sequence_;
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log_time realtime_;
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union {
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char* msg_; // mDropped == false
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int32_t tag_; // mDropped == true
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};
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union {
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const uint16_t msg_len_; // mDropped == false
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uint16_t dropped_count_; // mDropped == true
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};
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const uint8_t log_id_;
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bool dropped_;
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};
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