Add out-of-memory (OOM) kills to ApplicationExitInfo (299d7070) · Commits · e / os / android_frameworks_base

core/java/android/app/ApplicationExitInfo.java

+12 −0

Original line number	Diff line number	Diff line
		@@ -460,6 +460,15 @@ public final class ApplicationExitInfo implements Parcelable {
		*/
		public static final int SUBREASON_SDK_SANDBOX_NOT_NEEDED = 28;

		/**
		* The process was killed by the [kernel] Out-of-memory (OOM) killer; this
		* would be set only when the reason is {@link #REASON_LOW_MEMORY}.
		*
		* For internal use only.
		* @hide
		*/
		public static final int SUBREASON_OOM_KILL = 30;

		// If there is any OEM code which involves additional app kill reasons, it should
		// be categorized in {@link #REASON_OTHER}, with subreason code starting from 1000.

		@@ -635,6 +644,7 @@ public final class ApplicationExitInfo implements Parcelable {
		SUBREASON_KILL_BACKGROUND,
		SUBREASON_PACKAGE_UPDATE,
		SUBREASON_UNDELIVERED_BROADCAST,
		SUBREASON_OOM_KILL,
		})
		@Retention(RetentionPolicy.SOURCE)
		public @interface SubReason {}
		@@ -1360,6 +1370,8 @@ public final class ApplicationExitInfo implements Parcelable {
		return "PACKAGE UPDATE";
		case SUBREASON_UNDELIVERED_BROADCAST:
		return "UNDELIVERED BROADCAST";
		case SUBREASON_OOM_KILL:
		return "OOM KILL";
		default:
		return "UNKNOWN";
		}

core/java/android/os/OomKillRecord.java

0 → 100644

+63 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2023 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.
		*/
		package android.os;


		/**
		* Expected data to get back from the OOM event's file.
		* Note that this should be equivalent to the struct <b>OomKill</b> inside
		* <pre>
		* system/memory/libmeminfo/libmemevents/include/memevents.h
		* </pre>
		*
		* @hide
		*/
		public final class OomKillRecord {
		private long mTimeStampInMillis;
		private int mPid;
		private int mUid;
		private String mProcessName;
		private short mOomScoreAdj;

		public OomKillRecord(long timeStampInMillis, int pid, int uid,
		String processName, short oomScoreAdj) {
		this.mTimeStampInMillis = timeStampInMillis;
		this.mPid = pid;
		this.mUid = uid;
		this.mProcessName = processName;
		this.mOomScoreAdj = oomScoreAdj;
		}

		public long getTimestampMilli() {
		return mTimeStampInMillis;
		}

		public int getPid() {
		return mPid;
		}

		public int getUid() {
		return mUid;
		}

		public String getProcessName() {
		return mProcessName;
		}

		public short getOomScoreAdj() {
		return mOomScoreAdj;
		}
		}

services/core/java/com/android/server/am/OomConnection.java

0 → 100644

+63 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2023 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.
		*/

		package com.android.server.am;

		import android.os.OomKillRecord;
		import android.util.Slog;

		/** Connection to the out-of-memory (OOM) events' file */
		public final class OomConnection {
		private static final String TAG = "OomConnection";

		/** Connection listener interface */
		public interface OomConnectionListener {

		/**
		* Callback function to handle the newest OOM kills.
		*
		* @param oomKills List of oom kills received from `waitOom()`
		*/
		void handleOomEvent(OomKillRecord[] oomKills);
		}

		private final OomConnectionListener mOomListener;

		private final OomConnectionThread mOomConnectionThread;

		private static native OomKillRecord[] waitOom();

		public OomConnection(OomConnectionListener listener) {
		mOomListener = listener;
		mOomConnectionThread = new OomConnectionThread();
		mOomConnectionThread.start();
		}

		private final class OomConnectionThread extends Thread {
		public void run() {
		while (true) {
		OomKillRecord[] oom_kills = null;
		try {
		oom_kills = waitOom();
		mOomListener.handleOomEvent(oom_kills);
		} catch (RuntimeException e) {
		Slog.e(TAG, "failed waiting for OOM events: " + e);
		break;
		}
		}
		}
		}
		}

services/core/java/com/android/server/am/ProcessList.java

+18 −0

Original line number	Diff line number	Diff line
		@@ -97,6 +97,7 @@ import android.os.Handler;
		import android.os.IBinder;
		import android.os.Looper;
		import android.os.Message;
		import android.os.OomKillRecord;
		import android.os.PowerManager;
		import android.os.Process;
		import android.os.RemoteCallbackList;
		@@ -412,6 +413,8 @@ public final class ProcessList {

		private static LmkdConnection sLmkdConnection = null;

		private static OomConnection sOomConnection = null;

		private boolean mOomLevelsSet = false;

		private boolean mAppDataIsolationEnabled = false;
		@@ -855,6 +858,21 @@ public final class ProcessList {
		THREAD_PRIORITY_BACKGROUND, true /* allowIo */);
		sKillThread.start();
		sKillHandler = new KillHandler(sKillThread.getLooper());
		sOomConnection = new OomConnection(new OomConnection.OomConnectionListener() {
		@Override
		public void handleOomEvent(OomKillRecord[] oomKills) {
		for (OomKillRecord oomKill: oomKills) {
		synchronized (mProcLock) {
		noteAppKill(
		oomKill.getPid(),
		oomKill.getUid(),
		ApplicationExitInfo.REASON_LOW_MEMORY,
		ApplicationExitInfo.SUBREASON_OOM_KILL,
		"oom");
		}
		}
		}
		});
		sLmkdConnection = new LmkdConnection(sKillThread.getLooper().getQueue(),
		new LmkdConnection.LmkdConnectionListener() {
		@Override

services/core/jni/Android.bp

+7 −0

Original line number	Diff line number	Diff line
		@@ -77,6 +77,7 @@ cc_library_static {
		"onload.cpp",
		":lib_cachedAppOptimizer_native",
		":lib_gameManagerService_native",
		":lib_oomConnection_native",
		],

		include_dirs: [
		@@ -118,6 +119,7 @@ cc_defaults {
		"libhardware_legacy",
		"libhidlbase",
		"libmeminfo",
		"libmemevents",
		"libmemtrackproxy",
		"libmtp",
		"libnativehelper",
		@@ -235,3 +237,8 @@ filegroup {
		"com_android_server_app_GameManagerService.cpp",
		],
		}

		filegroup {
		name: "lib_oomConnection_native",
		srcs: ["com_android_server_am_OomConnection.cpp"],
		}