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/*
* Copyright (C) 2021 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.
*/
#ifndef ART_ODREFRESH_ODR_COMPILATION_LOG_H_
#define ART_ODREFRESH_ODR_COMPILATION_LOG_H_
#include <time.h>
#include <cstdint>
#include <iosfwd>
#include <vector>
#include <odrefresh/odrefresh.h>
#include <odr_metrics.h>
namespace art {
namespace odrefresh {
// OdrCompilationLogEntry represents the result of a compilation attempt by odrefresh.
struct OdrCompilationLogEntry {
int64_t apex_version;
int64_t last_update_millis;
int32_t trigger;
time_t when;
int32_t exit_code;
};
// Read an `OdrCompilationLogEntry` from an input stream.
std::istream& operator>>(std::istream& is, OdrCompilationLogEntry& entry);
// Write an `OdrCompilationLogEntry` to an output stream.
std::ostream& operator<<(std::ostream& os, const OdrCompilationLogEntry& entry);
// Equality test for two `OdrCompilationLogEntry` instances.
bool operator==(const OdrCompilationLogEntry& lhs, const OdrCompilationLogEntry& rhs);
bool operator!=(const OdrCompilationLogEntry& lhs, const OdrCompilationLogEntry& rhs);
class OdrCompilationLog {
public:
// The compilation log location is in the same directory as used for the metricss.log. This
// directory is only used by odrefresh whereas the ART apexdata directory is also used by odsign
// and others which may lead to the deletion (or rollback) of the log file.
static constexpr const char* kCompilationLogFile = "/data/misc/odrefresh/compilation-log.txt";
// Version string that appears on the first line of the compilation log.
static constexpr const char kLogVersion[] = "CompilationLog/1.0";
// Number of log entries in the compilation log.
static constexpr const size_t kMaxLoggedEntries = 4;
explicit OdrCompilationLog(const char* compilation_log_path = kCompilationLogFile);
~OdrCompilationLog();
// Applies policy to compilation log to determine whether to recompile.
bool ShouldAttemptCompile(int64_t apex_version,
int64_t last_update_millis,
OdrMetrics::Trigger trigger,
time_t now = 0) const;
// Returns the number of entries in the log. The log never exceeds `kMaxLoggedEntries`.
size_t NumberOfEntries() const;
// Returns the entry at position `index` or nullptr if `index` is out of bounds.
const OdrCompilationLogEntry* Peek(size_t index) const;
void Log(int64_t apex_version,
int64_t last_update_millis,
OdrMetrics::Trigger trigger,
ExitCode compilation_result);
void Log(int64_t apex_version,
int64_t last_update_millis,
OdrMetrics::Trigger trigger,
time_t when,
ExitCode compilation_result);
// Truncates the in memory log to have `kMaxLoggedEntries` records.
void Truncate();
private:
bool Read();
bool Write() const;
std::vector<OdrCompilationLogEntry> entries_;
const char* log_path_;
};
} // namespace odrefresh
} // namespace art
#endif // ART_ODREFRESH_ODR_COMPILATION_LOG_H_
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