39dc221026
liblog exposed __android_logger_get_buffer_size() which queries log size properties, but that should not be a generic library function. Logd should be the only process that queries these properties and other processes should query the actual used log sizes from logd via the android_logger_get_log_*_size() functions. Also, always use 1MB for log buffer tests, instead of just on host and various other clean up related to improper types. Test: log buffers are correctly sized Merged-In: I9b7c86bf58e569618737afe9097cf1c4d4e61d95 Change-Id: I9b7c86bf58e569618737afe9097cf1c4d4e61d95
75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
/*
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* Copyright (C) 2020 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 <functional>
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#include <log/log.h>
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#include <log/log_read.h>
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#include "LogWriter.h"
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// A mask to represent which log buffers a reader is watching, values are (1 << LOG_ID_MAIN), etc.
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using LogMask = uint32_t;
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constexpr uint32_t kLogMaskAll = 0xFFFFFFFF;
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// State that a LogBuffer may want to persist across calls to FlushTo().
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class FlushToState {
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public:
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FlushToState(uint64_t start, LogMask log_mask) : start_(start), log_mask_(log_mask) {}
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virtual ~FlushToState() {}
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uint64_t start() const { return start_; }
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void set_start(uint64_t start) { start_ = start; }
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LogMask log_mask() const { return log_mask_; }
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private:
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uint64_t start_;
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LogMask log_mask_;
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};
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// Enum for the return values of the `filter` function passed to FlushTo().
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enum class FilterResult {
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kSkip,
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kStop,
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kWrite,
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};
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class LogBuffer {
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public:
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virtual ~LogBuffer() {}
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virtual void Init() = 0;
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virtual int Log(log_id_t log_id, log_time realtime, uid_t uid, pid_t pid, pid_t tid,
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const char* msg, uint16_t len) = 0;
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virtual std::unique_ptr<FlushToState> CreateFlushToState(uint64_t start, LogMask log_mask) = 0;
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virtual bool FlushTo(
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LogWriter* writer, FlushToState& state,
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const std::function<FilterResult(log_id_t log_id, pid_t pid, uint64_t sequence,
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log_time realtime)>& filter) = 0;
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virtual bool Clear(log_id_t id, uid_t uid) = 0;
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virtual size_t GetSize(log_id_t id) = 0;
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virtual bool SetSize(log_id_t id, size_t size) = 0;
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virtual uint64_t sequence() const = 0;
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};
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