diff --git a/Android.bp b/Android.bp index 76d308a..e16db65 100644 --- a/Android.bp +++ b/Android.bp @@ -18,3 +18,15 @@ cc_binary { }, }, } + +cc_library_shared { + name: "libstatslogc", + srcs: ["statslog.c"], + cflags: [ + "-Wall", + "-Werror", + ], + shared_libs: [ + "liblog", + ], +} diff --git a/statslog.c b/statslog.c new file mode 100644 index 0000000..db7a76a --- /dev/null +++ b/statslog.c @@ -0,0 +1,100 @@ +/* + * 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. + */ + +#include +#include +#include +#include + +/** + * 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) { + assert(ctx != NULL); + int ret = -EINVAL; + if (!ctx) { + return ret; + } + + if ((ret = android_log_write_int32(ctx, code)) < 0) { + return ret; + } + + if ((ret = android_log_write_int32(ctx, state)) < 0) { + return ret; + } + return ret; +} + +/** + * 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) { + assert(ctx != NULL); + int ret = -EINVAL; + if (!ctx) { + return ret; + } + + if ((ret = android_log_write_int32(ctx, code)) < 0) { + return ret; + } + + if ((ret = android_log_write_int32(ctx, uid)) < 0) { + return ret; + } + + if ((ret = android_log_write_string8(ctx, (process_name == NULL) ? "" : process_name)) < 0) { + return ret; + } + + if ((ret = android_log_write_int32(ctx, oom_score)) < 0) { + return ret; + } + + if ((ret = android_log_write_int64(ctx, pgfault)) < 0) { + return ret; + } + + if ((ret = android_log_write_int64(ctx, pgmajfault)) < 0) { + return ret; + } + + if ((ret = android_log_write_int64(ctx, rss_in_bytes)) < 0) { + return ret; + } + + if ((ret = android_log_write_int64(ctx, cache_in_bytes)) < 0) { + return ret; + } + + if ((ret = android_log_write_int64(ctx, swap_in_bytes)) < 0) { + return ret; + } + + if ((ret = android_log_write_list(ctx, LOG_ID_STATS)) < 0) { + return ret; + } + return ret; +} diff --git a/statslog.h b/statslog.h new file mode 100644 index 0000000..ea05fa6 --- /dev/null +++ b/statslog.h @@ -0,0 +1,39 @@ +/* + * 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. + */ + +#pragma once + +#include +__BEGIN_DECLS + +/** + * 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); +__END_DECLS