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/*
* Copyright 2018 Google, Inc
*
* 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 _STATSLOG_H_
#define _STATSLOG_H_
#include <assert.h>
#include <stats_event_list.h>
#include <stdbool.h>
#include <sys/cdefs.h>
#include <cutils/properties.h>
__BEGIN_DECLS
/*
* These are defined in
* http://cs/android/frameworks/base/cmds/statsd/src/atoms.proto
*/
#define LMK_KILL_OCCURRED 51
#define LMK_STATE_CHANGED 54
#define LMK_STATE_CHANGE_START 1
#define LMK_STATE_CHANGE_STOP 2
/*
* The single event tag id for all stats logs.
* Keep this in sync with system/core/logcat/event.logtags
*/
const static int kStatsEventTag = 1937006964;
static inline void statslog_init(android_log_context* log_ctx, bool* enable_stats_log) {
assert(log_ctx != NULL);
assert(enable_stats_log != NULL);
*enable_stats_log = property_get_bool("ro.lmk.log_stats", false);
if (*enable_stats_log) {
*log_ctx = create_android_logger(kStatsEventTag);
}
}
static inline void statslog_destroy(android_log_context* log_ctx) {
assert(log_ctx != NULL);
if (*log_ctx) {
android_log_destroy(log_ctx);
}
}
struct memory_stat {
int64_t pgfault;
int64_t pgmajfault;
int64_t rss_in_bytes;
int64_t cache_in_bytes;
int64_t swap_in_bytes;
int64_t process_start_time_ns;
};
#define MEMCG_PROCESS_MEMORY_STAT_PATH "/dev/memcg/apps/uid_%u/pid_%u/memory.stat"
#define PROC_STAT_FILE_PATH "/proc/%d/stat"
#define PROC_STAT_BUFFER_SIZE 1024
#define BYTES_IN_KILOBYTE 1024
/**
* Logs the change in LMKD state which is used as start/stop boundaries for logging
* LMK_KILL_OCCURRED event.
* Code: LMK_STATE_CHANGED = 54
*/
int
stats_write_lmk_state_changed(android_log_context ctx, int32_t code, int32_t state);
/**
* Logs the event when LMKD kills a process to reduce memory pressure.
* Code: LMK_KILL_OCCURRED = 51
*/
int
stats_write_lmk_kill_occurred(android_log_context ctx, int32_t code, int32_t uid,
char const* process_name, int32_t oom_score, int64_t pgfault,
int64_t pgmajfault, int64_t rss_in_bytes, int64_t cache_in_bytes,
int64_t swap_in_bytes, int64_t process_start_time_ns);
__END_DECLS
#endif /* _STATSLOG_H_ */
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