4ed16b4381
This forward port reverts
commit e457b74ce6
No longer as necessary once we add
liblog: Instrument logging of logd write drops
Although this provided an indication of how close statistically we
were to overloading logd it is simpler to understand fails thus to
hunt and peck a corrected value for /proc/sys/net/unix/max_dgram_qlen
Change-Id: I2b30e0fc30625a48fd11a12c2d2cc6a41f26226f
83 lines
2.4 KiB
C++
83 lines
2.4 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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#ifndef _LOGD_LOG_BUFFER_H__
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#define _LOGD_LOG_BUFFER_H__
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#include <sys/types.h>
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#include <log/log.h>
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#include <sysutils/SocketClient.h>
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#include <utils/List.h>
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#include <private/android_filesystem_config.h>
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#include "LogBufferElement.h"
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#include "LogTimes.h"
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#include "LogStatistics.h"
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#include "LogWhiteBlackList.h"
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typedef android::List<LogBufferElement *> LogBufferElementCollection;
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class LogBuffer {
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LogBufferElementCollection mLogElements;
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pthread_mutex_t mLogElementsLock;
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LogStatistics stats;
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PruneList mPrune;
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unsigned long mMaxSize[LOG_ID_MAX];
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public:
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LastLogTimes &mTimes;
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LogBuffer(LastLogTimes *times);
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void log(log_id_t log_id, log_time realtime,
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uid_t uid, pid_t pid, pid_t tid,
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const char *msg, unsigned short len);
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log_time flushTo(SocketClient *writer, const log_time start,
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bool privileged,
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bool (*filter)(const LogBufferElement *element, void *arg) = NULL,
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void *arg = NULL);
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void clear(log_id_t id, uid_t uid = AID_ROOT);
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unsigned long getSize(log_id_t id);
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int setSize(log_id_t id, unsigned long size);
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unsigned long getSizeUsed(log_id_t id);
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// *strp uses malloc, use free to release.
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void formatStatistics(char **strp, uid_t uid, unsigned int logMask);
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void enableStatistics() {
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stats.enableStatistics();
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}
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int initPrune(char *cp) { return mPrune.init(cp); }
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// *strp uses malloc, use free to release.
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void formatPrune(char **strp) { mPrune.format(strp); }
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// helper
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char *pidToName(pid_t pid) { return stats.pidToName(pid); }
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uid_t pidToUid(pid_t pid) { return stats.pidToUid(pid); }
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private:
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void maybePrune(log_id_t id);
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void prune(log_id_t id, unsigned long pruneRows, uid_t uid = AID_ROOT);
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};
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#endif // _LOGD_LOG_BUFFER_H__
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