98 lines
3.6 KiB
C++
98 lines
3.6 KiB
C++
/*
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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 <sys/types.h>
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#include <list>
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#include <optional>
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#include <string>
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#include <android/log.h>
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#include <private/android_filesystem_config.h>
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#include <sysutils/SocketClient.h>
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#include "LogBuffer.h"
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#include "LogBufferElement.h"
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#include "LogStatistics.h"
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#include "LogTags.h"
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#include "LogWhiteBlackList.h"
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typedef std::list<LogBufferElement*> LogBufferElementCollection;
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class LogReaderList;
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class LogReaderThread;
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class ChattyLogBuffer : public LogBuffer {
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LogBufferElementCollection mLogElements;
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pthread_rwlock_t mLogElementsLock;
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// watermark of any worst/chatty uid processing
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typedef std::unordered_map<uid_t, LogBufferElementCollection::iterator> LogBufferIteratorMap;
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LogBufferIteratorMap mLastWorst[LOG_ID_MAX];
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// watermark of any worst/chatty pid of system processing
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typedef std::unordered_map<pid_t, LogBufferElementCollection::iterator> LogBufferPidIteratorMap;
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LogBufferPidIteratorMap mLastWorstPidOfSystem[LOG_ID_MAX];
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unsigned long mMaxSize[LOG_ID_MAX];
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LogBufferElement* lastLoggedElements[LOG_ID_MAX];
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LogBufferElement* droppedElements[LOG_ID_MAX];
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void log(LogBufferElement* elem);
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public:
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ChattyLogBuffer(LogReaderList* reader_list, LogTags* tags, PruneList* prune,
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LogStatistics* stats);
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~ChattyLogBuffer();
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void Init() override;
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int Log(log_id_t log_id, log_time realtime, uid_t uid, pid_t pid, pid_t tid, const char* msg,
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uint16_t len) override;
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uint64_t FlushTo(
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SocketClient* writer, uint64_t start, pid_t* lastTid, bool privileged, bool security,
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const std::function<FlushToResult(const LogBufferElement* element)>& filter) override;
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bool Clear(log_id_t id, uid_t uid = AID_ROOT) override;
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unsigned long GetSize(log_id_t id) override;
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int SetSize(log_id_t id, unsigned long size) override;
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private:
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void wrlock() { pthread_rwlock_wrlock(&mLogElementsLock); }
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void rdlock() { pthread_rwlock_rdlock(&mLogElementsLock); }
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void unlock() { pthread_rwlock_unlock(&mLogElementsLock); }
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void maybePrune(log_id_t id);
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void kickMe(LogReaderThread* me, log_id_t id, unsigned long pruneRows);
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bool prune(log_id_t id, unsigned long pruneRows, uid_t uid = AID_ROOT);
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LogBufferElementCollection::iterator erase(LogBufferElementCollection::iterator it,
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bool coalesce = false);
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// Returns an iterator to the oldest element for a given log type, or mLogElements.end() if
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// there are no logs for the given log type. Requires mLogElementsLock to be held.
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LogBufferElementCollection::iterator GetOldest(log_id_t log_id);
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LogReaderList* reader_list_;
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LogTags* tags_;
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PruneList* prune_;
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LogStatistics* stats_;
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// Keeps track of the iterator to the oldest log message of a given log type, as an
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// optimization when pruning logs. Use GetOldest() to retrieve.
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std::optional<LogBufferElementCollection::iterator> oldest_[LOG_ID_MAX];
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};
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