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android / platform / frameworks / base / 241485cca87ac0f83560dfb0b935b54ea044cb91 / . / services / core / java / com / android / server / am / ProcessList.java
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/*
* Copyright (C) 2011 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 static android.app.ActivityManager.PROCESS_STATE_CACHED_ACTIVITY;
import static android.app.ActivityManager.PROCESS_STATE_NONEXISTENT;
import static android.app.ActivityThread.PROC_START_SEQ_IDENT;
import static android.content.pm.PackageManager.MATCH_DIRECT_BOOT_AUTO;
import static android.os.Process.SYSTEM_UID;
import static android.os.Process.THREAD_PRIORITY_BACKGROUND;
import static android.os.Process.getFreeMemory;
import static android.os.Process.getTotalMemory;
import static android.os.Process.killProcessQuiet;
import static android.os.Process.startWebView;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_LRU;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_PROCESSES;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_PSS;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_UID_OBSERVERS;
import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM;
import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME;
import static com.android.server.am.ActivityManagerService.KILL_APP_ZYGOTE_DELAY_MS;
import static com.android.server.am.ActivityManagerService.KILL_APP_ZYGOTE_MSG;
import static com.android.server.am.ActivityManagerService.PERSISTENT_MASK;
import static com.android.server.am.ActivityManagerService.PROC_START_TIMEOUT;
import static com.android.server.am.ActivityManagerService.PROC_START_TIMEOUT_MSG;
import static com.android.server.am.ActivityManagerService.PROC_START_TIMEOUT_WITH_WRAPPER;
import static com.android.server.am.ActivityManagerService.STOCK_PM_FLAGS;
import static com.android.server.am.ActivityManagerService.TAG_LRU;
import static com.android.server.am.ActivityManagerService.TAG_PROCESSES;
import static com.android.server.am.ActivityManagerService.TAG_PSS;
import static com.android.server.am.ActivityManagerService.TAG_UID_OBSERVERS;
import android.app.ActivityManager;
import android.app.AppGlobals;
import android.app.AppProtoEnums;
import android.app.IApplicationThread;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.IPackageManager;
import android.content.res.Resources;
import android.graphics.Point;
import android.net.LocalSocket;
import android.net.LocalSocketAddress;
import android.net.Uri;
import android.os.AppZygote;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.Process;
import android.os.RemoteException;
import android.os.StrictMode;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.os.Trace;
import android.os.UserHandle;
import android.os.storage.StorageManager;
import android.os.storage.StorageManagerInternal;
import android.text.TextUtils;
import android.util.ArrayMap;
import android.util.EventLog;
import android.util.LongSparseArray;
import android.util.Slog;
import android.util.SparseArray;
import android.util.SparseBooleanArray;
import android.util.StatsLog;
import android.view.Display;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.app.ProcessMap;
import com.android.internal.app.procstats.ProcessStats;
import com.android.internal.os.Zygote;
import com.android.internal.util.ArrayUtils;
import com.android.internal.util.MemInfoReader;
import com.android.server.LocalServices;
import com.android.server.ServiceThread;
import com.android.server.Watchdog;
import com.android.server.pm.dex.DexManager;
import com.android.server.wm.ActivityServiceConnectionsHolder;
import com.android.server.wm.WindowManagerService;
import dalvik.system.VMRuntime;
import libcore.io.IoUtils;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.BitSet;
import java.util.List;
/**
* Activity manager code dealing with processes.
*
* Method naming convention:
* <ul>
* <li> Methods suffixed with "LS" should be called within the {@link #sLmkdSocketLock} lock.
* </ul>
*/
public final class ProcessList {
static final String TAG = TAG_WITH_CLASS_NAME ? "ProcessList" : TAG_AM;
// The minimum time we allow between crashes, for us to consider this
// application to be bad and stop and its services and reject broadcasts.
static final int MIN_CRASH_INTERVAL = 60 * 1000;
// OOM adjustments for processes in various states:
// Uninitialized value for any major or minor adj fields
static final int INVALID_ADJ = -10000;
// Adjustment used in certain places where we don't know it yet.
// (Generally this is something that is going to be cached, but we
// don't know the exact value in the cached range to assign yet.)
static final int UNKNOWN_ADJ = 1001;
// This is a process only hosting activities that are not visible,
// so it can be killed without any disruption.
static final int CACHED_APP_MAX_ADJ = 999;
static final int CACHED_APP_MIN_ADJ = 900;
// This is the oom_adj level that we allow to die first. This cannot be equal to
// CACHED_APP_MAX_ADJ unless processes are actively being assigned an oom_score_adj of
// CACHED_APP_MAX_ADJ.
static final int CACHED_APP_LMK_FIRST_ADJ = 950;
// Number of levels we have available for different service connection group importance
// levels.
static final int CACHED_APP_IMPORTANCE_LEVELS = 5;
// The B list of SERVICE_ADJ -- these are the old and decrepit
// services that aren't as shiny and interesting as the ones in the A list.
static final int SERVICE_B_ADJ = 800;
// This is the process of the previous application that the user was in.
// This process is kept above other things, because it is very common to
// switch back to the previous app. This is important both for recent
// task switch (toggling between the two top recent apps) as well as normal
// UI flow such as clicking on a URI in the e-mail app to view in the browser,
// and then pressing back to return to e-mail.
static final int PREVIOUS_APP_ADJ = 700;
// This is a process holding the home application -- we want to try
// avoiding killing it, even if it would normally be in the background,
// because the user interacts with it so much.
static final int HOME_APP_ADJ = 600;
// This is a process holding an application service -- killing it will not
// have much of an impact as far as the user is concerned.
static final int SERVICE_ADJ = 500;
// This is a process with a heavy-weight application. It is in the
// background, but we want to try to avoid killing it. Value set in
// system/rootdir/init.rc on startup.
static final int HEAVY_WEIGHT_APP_ADJ = 400;
// This is a process currently hosting a backup operation. Killing it
// is not entirely fatal but is generally a bad idea.
static final int BACKUP_APP_ADJ = 300;
// This is a process only hosting components that are perceptible to the
// user, and we really want to avoid killing them, but they are not
// immediately visible. An example is background music playback.
static final int PERCEPTIBLE_APP_ADJ = 200;
// This is a process only hosting activities that are visible to the
// user, so we'd prefer they don't disappear.
static final int VISIBLE_APP_ADJ = 100;
static final int VISIBLE_APP_LAYER_MAX = PERCEPTIBLE_APP_ADJ - VISIBLE_APP_ADJ - 1;
// This is a process that was recently TOP and moved to FGS. Continue to treat it almost
// like a foreground app for a while.
// @see TOP_TO_FGS_GRACE_PERIOD
static final int PERCEPTIBLE_RECENT_FOREGROUND_APP_ADJ = 50;
// This is the process running the current foreground app. We'd really
// rather not kill it!
static final int FOREGROUND_APP_ADJ = 0;
// This is a process that the system or a persistent process has bound to,
// and indicated it is important.
static final int PERSISTENT_SERVICE_ADJ = -700;
// This is a system persistent process, such as telephony. Definitely
// don't want to kill it, but doing so is not completely fatal.
static final int PERSISTENT_PROC_ADJ = -800;
// The system process runs at the default adjustment.
static final int SYSTEM_ADJ = -900;
// Special code for native processes that are not being managed by the system (so
// don't have an oom adj assigned by the system).
static final int NATIVE_ADJ = -1000;
// Memory pages are 4K.
static final int PAGE_SIZE = 4 * 1024;
// Activity manager's version of Process.THREAD_GROUP_BG_NONINTERACTIVE
static final int SCHED_GROUP_BACKGROUND = 0;
// Activity manager's version of Process.THREAD_GROUP_RESTRICTED
static final int SCHED_GROUP_RESTRICTED = 1;
// Activity manager's version of Process.THREAD_GROUP_DEFAULT
static final int SCHED_GROUP_DEFAULT = 2;
// Activity manager's version of Process.THREAD_GROUP_TOP_APP
public static final int SCHED_GROUP_TOP_APP = 3;
// Activity manager's version of Process.THREAD_GROUP_TOP_APP
// Disambiguate between actual top app and processes bound to the top app
static final int SCHED_GROUP_TOP_APP_BOUND = 4;
// The minimum number of cached apps we want to be able to keep around,
// without empty apps being able to push them out of memory.
static final int MIN_CACHED_APPS = 2;
// We allow empty processes to stick around for at most 30 minutes.
static final long MAX_EMPTY_TIME = 30 * 60 * 1000;
// Threshold of number of cached+empty where we consider memory critical.
static final int TRIM_CRITICAL_THRESHOLD = 3;
// Threshold of number of cached+empty where we consider memory critical.
static final int TRIM_LOW_THRESHOLD = 5;
// Low Memory Killer Daemon command codes.
// These must be kept in sync with the definitions in lmkd.c
//
// LMK_TARGET <minfree> <minkillprio> ... (up to 6 pairs)
// LMK_PROCPRIO <pid> <uid> <prio>
// LMK_PROCREMOVE <pid>
// LMK_PROCPURGE
// LMK_GETKILLCNT
static final byte LMK_TARGET = 0;
static final byte LMK_PROCPRIO = 1;
static final byte LMK_PROCREMOVE = 2;
static final byte LMK_PROCPURGE = 3;
static final byte LMK_GETKILLCNT = 4;
ActivityManagerService mService = null;
// To kill process groups asynchronously
static KillHandler sKillHandler = null;
static ServiceThread sKillThread = null;
// These are the various interesting memory levels that we will give to
// the OOM killer. Note that the OOM killer only supports 6 slots, so we
// can't give it a different value for every possible kind of process.
private final int[] mOomAdj = new int[] {
FOREGROUND_APP_ADJ, VISIBLE_APP_ADJ, PERCEPTIBLE_APP_ADJ,
BACKUP_APP_ADJ, CACHED_APP_MIN_ADJ, CACHED_APP_LMK_FIRST_ADJ
};
// These are the low-end OOM level limits. This is appropriate for an
// HVGA or smaller phone with less than 512MB. Values are in KB.
private final int[] mOomMinFreeLow = new int[] {
12288, 18432, 24576,
36864, 43008, 49152
};
// These are the high-end OOM level limits. This is appropriate for a
// 1280x800 or larger screen with around 1GB RAM. Values are in KB.
private final int[] mOomMinFreeHigh = new int[] {
73728, 92160, 110592,
129024, 147456, 184320
};
// The actual OOM killer memory levels we are using.
private final int[] mOomMinFree = new int[mOomAdj.length];
private final long mTotalMemMb;
private long mCachedRestoreLevel;
private boolean mHaveDisplaySize;
private static Object sLmkdSocketLock = new Object();
@GuardedBy("sLmkdSocketLock")
private static LocalSocket sLmkdSocket;
@GuardedBy("sLmkdSocketLock")
private static OutputStream sLmkdOutputStream;
@GuardedBy("sLmkdSocketLock")
private static InputStream sLmkdInputStream;
/**
* Temporary to avoid allocations. Protected by main lock.
*/
@GuardedBy("mService")
final StringBuilder mStringBuilder = new StringBuilder(256);
/**
* A global counter for generating sequence numbers.
* This value will be used when incrementing sequence numbers in individual uidRecords.
*
* Having a global counter ensures that seq numbers are monotonically increasing for a
* particular uid even when the uidRecord is re-created.
*/
@GuardedBy("mService")
@VisibleForTesting
long mProcStateSeqCounter = 0;
/**
* A global counter for generating sequence numbers to uniquely identify pending process starts.
*/
@GuardedBy("mService")
private long mProcStartSeqCounter = 0;
/**
* Contains {@link ProcessRecord} objects for pending process starts.
*
* Mapping: {@link #mProcStartSeqCounter} -> {@link ProcessRecord}
*/
@GuardedBy("mService")
final LongSparseArray<ProcessRecord> mPendingStarts = new LongSparseArray<>();
/**
* List of running applications, sorted by recent usage.
* The first entry in the list is the least recently used.
*/
final ArrayList<ProcessRecord> mLruProcesses = new ArrayList<ProcessRecord>();
/**
* Where in mLruProcesses that the processes hosting activities start.
*/
int mLruProcessActivityStart = 0;
/**
* Where in mLruProcesses that the processes hosting services start.
* This is after (lower index) than mLruProcessesActivityStart.
*/
int mLruProcessServiceStart = 0;
/**
* Current sequence id for process LRU updating.
*/
int mLruSeq = 0;
ActiveUids mActiveUids;
/**
* The currently running isolated processes.
*/
final SparseArray<ProcessRecord> mIsolatedProcesses = new SparseArray<>();
/**
* The currently running application zygotes.
*/
final ProcessMap<AppZygote> mAppZygotes = new ProcessMap<AppZygote>();
/**
* The processes that are forked off an application zygote.
*/
final ArrayMap<AppZygote, ArrayList<ProcessRecord>> mAppZygoteProcesses =
new ArrayMap<AppZygote, ArrayList<ProcessRecord>>();
final class IsolatedUidRange {
@VisibleForTesting
public final int mFirstUid;
@VisibleForTesting
public final int mLastUid;
@GuardedBy("ProcessList.this.mService")
private final SparseBooleanArray mUidUsed = new SparseBooleanArray();
@GuardedBy("ProcessList.this.mService")
private int mNextUid;
IsolatedUidRange(int firstUid, int lastUid) {
mFirstUid = firstUid;
mLastUid = lastUid;
mNextUid = firstUid;
}
@GuardedBy("ProcessList.this.mService")
int allocateIsolatedUidLocked(int userId) {
int uid;
int stepsLeft = (mLastUid - mFirstUid + 1);
for (int i = 0; i < stepsLeft; ++i) {
if (mNextUid < mFirstUid || mNextUid > mLastUid) {
mNextUid = mFirstUid;
}
uid = UserHandle.getUid(userId, mNextUid);
mNextUid++;
if (!mUidUsed.get(uid, false)) {
mUidUsed.put(uid, true);
return uid;
}
}
return -1;
}
@GuardedBy("ProcessList.this.mService")
void freeIsolatedUidLocked(int uid) {
// Strip out userId
final int appId = UserHandle.getAppId(uid);
mUidUsed.delete(appId);
}
};
/**
* A class that allocates ranges of isolated UIDs per application, and keeps track of them.
*/
final class IsolatedUidRangeAllocator {
private final int mFirstUid;
private final int mNumUidRanges;
private final int mNumUidsPerRange;
/**
* We map the uid range [mFirstUid, mFirstUid + mNumUidRanges * mNumUidsPerRange)
* back to an underlying bitset of [0, mNumUidRanges) and allocate out of that.
*/
@GuardedBy("ProcessList.this.mService")
private final BitSet mAvailableUidRanges;
@GuardedBy("ProcessList.this.mService")
private final ProcessMap<IsolatedUidRange> mAppRanges = new ProcessMap<IsolatedUidRange>();
IsolatedUidRangeAllocator(int firstUid, int lastUid, int numUidsPerRange) {
mFirstUid = firstUid;
mNumUidsPerRange = numUidsPerRange;
mNumUidRanges = (lastUid - firstUid + 1) / numUidsPerRange;
mAvailableUidRanges = new BitSet(mNumUidRanges);
// Mark all as available
mAvailableUidRanges.set(0, mNumUidRanges);
}
@GuardedBy("ProcessList.this.mService")
IsolatedUidRange getIsolatedUidRangeLocked(ApplicationInfo info) {
return mAppRanges.get(info.processName, info.uid);
}
@GuardedBy("ProcessList.this.mService")
IsolatedUidRange getOrCreateIsolatedUidRangeLocked(ApplicationInfo info) {
IsolatedUidRange range = getIsolatedUidRangeLocked(info);
if (range == null) {
int uidRangeIndex = mAvailableUidRanges.nextSetBit(0);
if (uidRangeIndex < 0) {
// No free range
return null;
}
mAvailableUidRanges.clear(uidRangeIndex);
int actualUid = mFirstUid + uidRangeIndex * mNumUidsPerRange;
range = new IsolatedUidRange(actualUid, actualUid + mNumUidsPerRange - 1);
mAppRanges.put(info.processName, info.uid, range);
}
return range;
}
@GuardedBy("ProcessList.this.mService")
void freeUidRangeLocked(ApplicationInfo info) {
// Find the UID range
IsolatedUidRange range = mAppRanges.get(info.processName, info.uid);
if (range != null) {
// Map back to starting uid
final int uidRangeIndex = (range.mFirstUid - mFirstUid) / mNumUidsPerRange;
// Mark it as available in the underlying bitset
mAvailableUidRanges.set(uidRangeIndex);
// And the map
mAppRanges.remove(info.processName, info.uid);
}
}
}
/**
* The available isolated UIDs for processes that are not spawned from an application zygote.
*/
@VisibleForTesting
IsolatedUidRange mGlobalIsolatedUids = new IsolatedUidRange(Process.FIRST_ISOLATED_UID,
Process.LAST_ISOLATED_UID);
/**
* An allocator for isolated UID ranges for apps that use an application zygote.
*/
@VisibleForTesting
IsolatedUidRangeAllocator mAppIsolatedUidRangeAllocator =
new IsolatedUidRangeAllocator(Process.FIRST_APP_ZYGOTE_ISOLATED_UID,
Process.LAST_APP_ZYGOTE_ISOLATED_UID, Process.NUM_UIDS_PER_APP_ZYGOTE);
/**
* Processes that are being forcibly torn down.
*/
final ArrayList<ProcessRecord> mRemovedProcesses = new ArrayList<ProcessRecord>();
/**
* All of the applications we currently have running organized by name.
* The keys are strings of the application package name (as
* returned by the package manager), and the keys are ApplicationRecord
* objects.
*/
final MyProcessMap mProcessNames = new MyProcessMap();
final class MyProcessMap extends ProcessMap<ProcessRecord> {
@Override
public ProcessRecord put(String name, int uid, ProcessRecord value) {
final ProcessRecord r = super.put(name, uid, value);
mService.mAtmInternal.onProcessAdded(r.getWindowProcessController());
return r;
}
@Override
public ProcessRecord remove(String name, int uid) {
final ProcessRecord r = super.remove(name, uid);
mService.mAtmInternal.onProcessRemoved(name, uid);
return r;
}
}
final class KillHandler extends Handler {
static final int KILL_PROCESS_GROUP_MSG = 4000;
public KillHandler(Looper looper) {
super(looper, null, true);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case KILL_PROCESS_GROUP_MSG:
Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "killProcessGroup");
Process.killProcessGroup(msg.arg1 /* uid */, msg.arg2 /* pid */);
Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
break;
default:
super.handleMessage(msg);
}
}
}
//////////////////// END FIELDS ////////////////////
ProcessList() {
MemInfoReader minfo = new MemInfoReader();
minfo.readMemInfo();
mTotalMemMb = minfo.getTotalSize()/(1024*1024);
updateOomLevels(0, 0, false);
}
void init(ActivityManagerService service, ActiveUids activeUids) {
mService = service;
mActiveUids = activeUids;
if (sKillHandler == null) {
sKillThread = new ServiceThread(TAG + ":kill",
THREAD_PRIORITY_BACKGROUND, true /* allowIo */);
sKillThread.start();
sKillHandler = new KillHandler(sKillThread.getLooper());
}
}
void applyDisplaySize(WindowManagerService wm) {
if (!mHaveDisplaySize) {
Point p = new Point();
// TODO(multi-display): Compute based on sum of all connected displays' resolutions.
wm.getBaseDisplaySize(Display.DEFAULT_DISPLAY, p);
if (p.x != 0 && p.y != 0) {
updateOomLevels(p.x, p.y, true);
mHaveDisplaySize = true;
}
}
}
private void updateOomLevels(int displayWidth, int displayHeight, boolean write) {
// Scale buckets from avail memory: at 300MB we use the lowest values to
// 700MB or more for the top values.
float scaleMem = ((float) (mTotalMemMb - 350)) / (700 - 350);
// Scale buckets from screen size.
int minSize = 480 * 800; // 384000
int maxSize = 1280 * 800; // 1024000 230400 870400 .264
float scaleDisp = ((float)(displayWidth * displayHeight) - minSize) / (maxSize - minSize);
if (false) {
Slog.i("XXXXXX", "scaleMem=" + scaleMem);
Slog.i("XXXXXX", "scaleDisp=" + scaleDisp + " dw=" + displayWidth
+ " dh=" + displayHeight);
}
float scale = scaleMem > scaleDisp ? scaleMem : scaleDisp;
if (scale < 0) scale = 0;
else if (scale > 1) scale = 1;
int minfree_adj = Resources.getSystem().getInteger(
com.android.internal.R.integer.config_lowMemoryKillerMinFreeKbytesAdjust);
int minfree_abs = Resources.getSystem().getInteger(
com.android.internal.R.integer.config_lowMemoryKillerMinFreeKbytesAbsolute);
if (false) {
Slog.i("XXXXXX", "minfree_adj=" + minfree_adj + " minfree_abs=" + minfree_abs);
}
final boolean is64bit = Build.SUPPORTED_64_BIT_ABIS.length > 0;
for (int i = 0; i < mOomAdj.length; i++) {
int low = mOomMinFreeLow[i];
int high = mOomMinFreeHigh[i];
if (is64bit) {
// Increase the high min-free levels for cached processes for 64-bit
if (i == 4) high = (high * 3) / 2;
else if (i == 5) high = (high * 7) / 4;
}
mOomMinFree[i] = (int)(low + ((high - low) * scale));
}
if (minfree_abs >= 0) {
for (int i = 0; i < mOomAdj.length; i++) {
mOomMinFree[i] = (int)((float)minfree_abs * mOomMinFree[i]
/ mOomMinFree[mOomAdj.length - 1]);
}
}
if (minfree_adj != 0) {
for (int i = 0; i < mOomAdj.length; i++) {
mOomMinFree[i] += (int)((float) minfree_adj * mOomMinFree[i]
/ mOomMinFree[mOomAdj.length - 1]);
if (mOomMinFree[i] < 0) {
mOomMinFree[i] = 0;
}
}
}
// The maximum size we will restore a process from cached to background, when under
// memory duress, is 1/3 the size we have reserved for kernel caches and other overhead
// before killing background processes.
mCachedRestoreLevel = (getMemLevel(ProcessList.CACHED_APP_MAX_ADJ) / 1024) / 3;
// Ask the kernel to try to keep enough memory free to allocate 3 full
// screen 32bpp buffers without entering direct reclaim.
int reserve = displayWidth * displayHeight * 4 * 3 / 1024;
int reserve_adj = Resources.getSystem().getInteger(
com.android.internal.R.integer.config_extraFreeKbytesAdjust);
int reserve_abs = Resources.getSystem().getInteger(
com.android.internal.R.integer.config_extraFreeKbytesAbsolute);
if (reserve_abs >= 0) {
reserve = reserve_abs;
}
if (reserve_adj != 0) {
reserve += reserve_adj;
if (reserve < 0) {
reserve = 0;
}
}
if (write) {
ByteBuffer buf = ByteBuffer.allocate(4 * (2 * mOomAdj.length + 1));
buf.putInt(LMK_TARGET);
for (int i = 0; i < mOomAdj.length; i++) {
buf.putInt((mOomMinFree[i] * 1024)/PAGE_SIZE);
buf.putInt(mOomAdj[i]);
}
writeLmkd(buf, null);
SystemProperties.set("sys.sysctl.extra_free_kbytes", Integer.toString(reserve));
}
// GB: 2048,3072,4096,6144,7168,8192
// HC: 8192,10240,12288,14336,16384,20480
}
public static int computeEmptyProcessLimit(int totalProcessLimit) {
return totalProcessLimit/2;
}
private static String buildOomTag(String prefix, String space, int val, int base) {
final int diff = val - base;
if (diff == 0) {
if (space == null) return prefix;
return prefix + space;
}
if (diff < 10) {
return prefix + "+ " + Integer.toString(diff);
}
return prefix + "+" + Integer.toString(diff);
}
public static String makeOomAdjString(int setAdj) {
if (setAdj >= ProcessList.CACHED_APP_MIN_ADJ) {
return buildOomTag("cch", " ", setAdj, ProcessList.CACHED_APP_MIN_ADJ);
} else if (setAdj >= ProcessList.SERVICE_B_ADJ) {
return buildOomTag("svcb ", null, setAdj, ProcessList.SERVICE_B_ADJ);
} else if (setAdj >= ProcessList.PREVIOUS_APP_ADJ) {
return buildOomTag("prev ", null, setAdj, ProcessList.PREVIOUS_APP_ADJ);
} else if (setAdj >= ProcessList.HOME_APP_ADJ) {
return buildOomTag("home ", null, setAdj, ProcessList.HOME_APP_ADJ);
} else if (setAdj >= ProcessList.SERVICE_ADJ) {
return buildOomTag("svc ", null, setAdj, ProcessList.SERVICE_ADJ);
} else if (setAdj >= ProcessList.HEAVY_WEIGHT_APP_ADJ) {
return buildOomTag("hvy ", null, setAdj, ProcessList.HEAVY_WEIGHT_APP_ADJ);
} else if (setAdj >= ProcessList.BACKUP_APP_ADJ) {
return buildOomTag("bkup ", null, setAdj, ProcessList.BACKUP_APP_ADJ);
} else if (setAdj >= ProcessList.PERCEPTIBLE_APP_ADJ) {
return buildOomTag("prcp ", null, setAdj, ProcessList.PERCEPTIBLE_APP_ADJ);
} else if (setAdj >= ProcessList.VISIBLE_APP_ADJ) {
return buildOomTag("vis", " ", setAdj, ProcessList.VISIBLE_APP_ADJ);
} else if (setAdj >= ProcessList.FOREGROUND_APP_ADJ) {
return buildOomTag("fore ", null, setAdj, ProcessList.FOREGROUND_APP_ADJ);
} else if (setAdj >= ProcessList.PERSISTENT_SERVICE_ADJ) {
return buildOomTag("psvc ", null, setAdj, ProcessList.PERSISTENT_SERVICE_ADJ);
} else if (setAdj >= ProcessList.PERSISTENT_PROC_ADJ) {
return buildOomTag("pers ", null, setAdj, ProcessList.PERSISTENT_PROC_ADJ);
} else if (setAdj >= ProcessList.SYSTEM_ADJ) {
return buildOomTag("sys ", null, setAdj, ProcessList.SYSTEM_ADJ);
} else if (setAdj >= ProcessList.NATIVE_ADJ) {
return buildOomTag("ntv ", null, setAdj, ProcessList.NATIVE_ADJ);
} else {
return Integer.toString(setAdj);
}
}
public static String makeProcStateString(int curProcState) {
String procState;
switch (curProcState) {
case ActivityManager.PROCESS_STATE_PERSISTENT:
procState = "PER ";
break;
case ActivityManager.PROCESS_STATE_PERSISTENT_UI:
procState = "PERU";
break;
case ActivityManager.PROCESS_STATE_TOP:
procState = "TOP ";
break;
case ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE:
procState = "FGS ";
break;
case ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE:
procState = "BFGS";
break;
case ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND:
procState = "IMPF";
break;
case ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND:
procState = "IMPB";
break;
case ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND:
procState = "TRNB";
break;
case ActivityManager.PROCESS_STATE_BACKUP:
procState = "BKUP";
break;
case ActivityManager.PROCESS_STATE_SERVICE:
procState = "SVC ";
break;
case ActivityManager.PROCESS_STATE_RECEIVER:
procState = "RCVR";
break;
case ActivityManager.PROCESS_STATE_TOP_SLEEPING:
procState = "TPSL";
break;
case ActivityManager.PROCESS_STATE_HEAVY_WEIGHT:
procState = "HVY ";
break;
case ActivityManager.PROCESS_STATE_HOME:
procState = "HOME";
break;
case ActivityManager.PROCESS_STATE_LAST_ACTIVITY:
procState = "LAST";
break;
case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY:
procState = "CAC ";
break;
case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT:
procState = "CACC";
break;
case ActivityManager.PROCESS_STATE_CACHED_RECENT:
procState = "CRE ";
break;
case ActivityManager.PROCESS_STATE_CACHED_EMPTY:
procState = "CEM ";
break;
case ActivityManager.PROCESS_STATE_NONEXISTENT:
procState = "NONE";
break;
default:
procState = "??";
break;
}
return procState;
}
public static int makeProcStateProtoEnum(int curProcState) {
switch (curProcState) {
case ActivityManager.PROCESS_STATE_PERSISTENT:
return AppProtoEnums.PROCESS_STATE_PERSISTENT;
case ActivityManager.PROCESS_STATE_PERSISTENT_UI:
return AppProtoEnums.PROCESS_STATE_PERSISTENT_UI;
case ActivityManager.PROCESS_STATE_TOP:
return AppProtoEnums.PROCESS_STATE_TOP;
case ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE:
return AppProtoEnums.PROCESS_STATE_BOUND_FOREGROUND_SERVICE;
case ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE:
return AppProtoEnums.PROCESS_STATE_FOREGROUND_SERVICE;
case ActivityManager.PROCESS_STATE_TOP_SLEEPING:
return AppProtoEnums.PROCESS_STATE_TOP_SLEEPING;
case ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND:
return AppProtoEnums.PROCESS_STATE_IMPORTANT_FOREGROUND;
case ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND:
return AppProtoEnums.PROCESS_STATE_IMPORTANT_BACKGROUND;
case ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND:
return AppProtoEnums.PROCESS_STATE_TRANSIENT_BACKGROUND;
case ActivityManager.PROCESS_STATE_BACKUP:
return AppProtoEnums.PROCESS_STATE_BACKUP;
case ActivityManager.PROCESS_STATE_HEAVY_WEIGHT:
return AppProtoEnums.PROCESS_STATE_HEAVY_WEIGHT;
case ActivityManager.PROCESS_STATE_SERVICE:
return AppProtoEnums.PROCESS_STATE_SERVICE;
case ActivityManager.PROCESS_STATE_RECEIVER:
return AppProtoEnums.PROCESS_STATE_RECEIVER;
case ActivityManager.PROCESS_STATE_HOME:
return AppProtoEnums.PROCESS_STATE_HOME;
case ActivityManager.PROCESS_STATE_LAST_ACTIVITY:
return AppProtoEnums.PROCESS_STATE_LAST_ACTIVITY;
case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY:
return AppProtoEnums.PROCESS_STATE_CACHED_ACTIVITY;
case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT:
return AppProtoEnums.PROCESS_STATE_CACHED_ACTIVITY_CLIENT;
case ActivityManager.PROCESS_STATE_CACHED_RECENT:
return AppProtoEnums.PROCESS_STATE_CACHED_RECENT;
case ActivityManager.PROCESS_STATE_CACHED_EMPTY:
return AppProtoEnums.PROCESS_STATE_CACHED_EMPTY;
case ActivityManager.PROCESS_STATE_NONEXISTENT:
return AppProtoEnums.PROCESS_STATE_NONEXISTENT;
case ActivityManager.PROCESS_STATE_UNKNOWN:
return AppProtoEnums.PROCESS_STATE_UNKNOWN;
default:
return AppProtoEnums.PROCESS_STATE_UNKNOWN_TO_PROTO;
}
}
public static void appendRamKb(StringBuilder sb, long ramKb) {
for (int j = 0, fact = 10; j < 6; j++, fact *= 10) {
if (ramKb < fact) {
sb.append(' ');
}
}
sb.append(ramKb);
}
// How long after a state change that it is safe to collect PSS without it being dirty.
public static final int PSS_SAFE_TIME_FROM_STATE_CHANGE = 1000;
// The minimum time interval after a state change it is safe to collect PSS.
public static final int PSS_MIN_TIME_FROM_STATE_CHANGE = 15*1000;
// The maximum amount of time we want to go between PSS collections.
public static final int PSS_MAX_INTERVAL = 60*60*1000;
// The minimum amount of time between successive PSS requests for *all* processes.
public static final int PSS_ALL_INTERVAL = 20*60*1000;
// The amount of time until PSS when a persistent process first appears.
private static final int PSS_FIRST_PERSISTENT_INTERVAL = 30*1000;
// The amount of time until PSS when a process first becomes top.
private static final int PSS_FIRST_TOP_INTERVAL = 10*1000;
// The amount of time until PSS when a process first goes into the background.
private static final int PSS_FIRST_BACKGROUND_INTERVAL = 20*1000;
// The amount of time until PSS when a process first becomes cached.
private static final int PSS_FIRST_CACHED_INTERVAL = 20*1000;
// The amount of time until PSS when an important process stays in the same state.
private static final int PSS_SAME_PERSISTENT_INTERVAL = 10*60*1000;
// The amount of time until PSS when the top process stays in the same state.
private static final int PSS_SAME_TOP_INTERVAL = 1*60*1000;
// The amount of time until PSS when an important process stays in the same state.
private static final int PSS_SAME_IMPORTANT_INTERVAL = 10*60*1000;
// The amount of time until PSS when a service process stays in the same state.
private static final int PSS_SAME_SERVICE_INTERVAL = 5*60*1000;
// The amount of time until PSS when a cached process stays in the same state.
private static final int PSS_SAME_CACHED_INTERVAL = 10*60*1000;
// The amount of time until PSS when a persistent process first appears.
private static final int PSS_FIRST_ASLEEP_PERSISTENT_INTERVAL = 1*60*1000;
// The amount of time until PSS when a process first becomes top.
private static final int PSS_FIRST_ASLEEP_TOP_INTERVAL = 20*1000;
// The amount of time until PSS when a process first goes into the background.
private static final int PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL = 30*1000;
// The amount of time until PSS when a process first becomes cached.
private static final int PSS_FIRST_ASLEEP_CACHED_INTERVAL = 1*60*1000;
// The minimum time interval after a state change it is safe to collect PSS.
public static final int PSS_TEST_MIN_TIME_FROM_STATE_CHANGE = 10*1000;
// The amount of time during testing until PSS when a process first becomes top.
private static final int PSS_TEST_FIRST_TOP_INTERVAL = 3*1000;
// The amount of time during testing until PSS when a process first goes into the background.
private static final int PSS_TEST_FIRST_BACKGROUND_INTERVAL = 5*1000;
// The amount of time during testing until PSS when an important process stays in same state.
private static final int PSS_TEST_SAME_IMPORTANT_INTERVAL = 10*1000;
// The amount of time during testing until PSS when a background process stays in same state.
private static final int PSS_TEST_SAME_BACKGROUND_INTERVAL = 15*1000;
public static final int PROC_MEM_PERSISTENT = 0;
public static final int PROC_MEM_TOP = 1;
public static final int PROC_MEM_IMPORTANT = 2;
public static final int PROC_MEM_SERVICE = 3;
public static final int PROC_MEM_CACHED = 4;
public static final int PROC_MEM_NUM = 5;
// Map large set of system process states to
private static final int[] sProcStateToProcMem = new int[] {
PROC_MEM_PERSISTENT, // ActivityManager.PROCESS_STATE_PERSISTENT
PROC_MEM_PERSISTENT, // ActivityManager.PROCESS_STATE_PERSISTENT_UI
PROC_MEM_TOP, // ActivityManager.PROCESS_STATE_TOP
PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE
PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE
PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND
PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND
PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND
PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_BACKUP
PROC_MEM_SERVICE, // ActivityManager.PROCESS_STATE_SERVICE
PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_RECEIVER
PROC_MEM_TOP, // ActivityManager.PROCESS_STATE_TOP_SLEEPING
PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT
PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_HOME
PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY
PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY
PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT
PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_RECENT
PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_EMPTY
};
private static final long[] sFirstAwakePssTimes = new long[] {
PSS_FIRST_PERSISTENT_INTERVAL, // PROC_MEM_PERSISTENT
PSS_FIRST_TOP_INTERVAL, // PROC_MEM_TOP
PSS_FIRST_BACKGROUND_INTERVAL, // PROC_MEM_IMPORTANT
PSS_FIRST_BACKGROUND_INTERVAL, // PROC_MEM_SERVICE
PSS_FIRST_CACHED_INTERVAL, // PROC_MEM_CACHED
};
private static final long[] sSameAwakePssTimes = new long[] {
PSS_SAME_PERSISTENT_INTERVAL, // PROC_MEM_PERSISTENT
PSS_SAME_TOP_INTERVAL, // PROC_MEM_TOP
PSS_SAME_IMPORTANT_INTERVAL, // PROC_MEM_IMPORTANT
PSS_SAME_SERVICE_INTERVAL, // PROC_MEM_SERVICE
PSS_SAME_CACHED_INTERVAL, // PROC_MEM_CACHED
};
private static final long[] sFirstAsleepPssTimes = new long[] {
PSS_FIRST_ASLEEP_PERSISTENT_INTERVAL, // PROC_MEM_PERSISTENT
PSS_FIRST_ASLEEP_TOP_INTERVAL, // PROC_MEM_TOP
PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL, // PROC_MEM_IMPORTANT
PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL, // PROC_MEM_SERVICE
PSS_FIRST_ASLEEP_CACHED_INTERVAL, // PROC_MEM_CACHED
};
private static final long[] sSameAsleepPssTimes = new long[] {
PSS_SAME_PERSISTENT_INTERVAL, // PROC_MEM_PERSISTENT
PSS_SAME_TOP_INTERVAL, // PROC_MEM_TOP
PSS_SAME_IMPORTANT_INTERVAL, // PROC_MEM_IMPORTANT
PSS_SAME_SERVICE_INTERVAL, // PROC_MEM_SERVICE
PSS_SAME_CACHED_INTERVAL, // PROC_MEM_CACHED
};
private static final long[] sTestFirstPssTimes = new long[] {
PSS_TEST_FIRST_TOP_INTERVAL, // PROC_MEM_PERSISTENT
PSS_TEST_FIRST_TOP_INTERVAL, // PROC_MEM_TOP
PSS_TEST_FIRST_BACKGROUND_INTERVAL, // PROC_MEM_IMPORTANT
PSS_TEST_FIRST_BACKGROUND_INTERVAL, // PROC_MEM_SERVICE
PSS_TEST_FIRST_BACKGROUND_INTERVAL, // PROC_MEM_CACHED
};
private static final long[] sTestSamePssTimes = new long[] {
PSS_TEST_SAME_BACKGROUND_INTERVAL, // PROC_MEM_PERSISTENT
PSS_TEST_SAME_IMPORTANT_INTERVAL, // PROC_MEM_TOP
PSS_TEST_SAME_IMPORTANT_INTERVAL, // PROC_MEM_IMPORTANT
PSS_TEST_SAME_BACKGROUND_INTERVAL, // PROC_MEM_SERVICE
PSS_TEST_SAME_BACKGROUND_INTERVAL, // PROC_MEM_CACHED
};
public static final class ProcStateMemTracker {
final int[] mHighestMem = new int[PROC_MEM_NUM];
final float[] mScalingFactor = new float[PROC_MEM_NUM];
int mTotalHighestMem = PROC_MEM_CACHED;
int mPendingMemState;
int mPendingHighestMemState;
float mPendingScalingFactor;
public ProcStateMemTracker() {
for (int i = PROC_MEM_PERSISTENT; i < PROC_MEM_NUM; i++) {
mHighestMem[i] = PROC_MEM_NUM;
mScalingFactor[i] = 1.0f;
}
mPendingMemState = -1;
}
public void dumpLine(PrintWriter pw) {
pw.print("best=");
pw.print(mTotalHighestMem);
pw.print(" (");
boolean needSep = false;
for (int i = 0; i < PROC_MEM_NUM; i++) {
if (mHighestMem[i] < PROC_MEM_NUM) {
if (needSep) {
pw.print(", ");
needSep = false;
}
pw.print(i);
pw.print("=");
pw.print(mHighestMem[i]);
pw.print(" ");
pw.print(mScalingFactor[i]);
pw.print("x");
needSep = true;
}
}
pw.print(")");
if (mPendingMemState >= 0) {
pw.print(" / pending state=");
pw.print(mPendingMemState);
pw.print(" highest=");
pw.print(mPendingHighestMemState);
pw.print(" ");
pw.print(mPendingScalingFactor);
pw.print("x");
}
pw.println();
}
}
public static boolean procStatesDifferForMem(int procState1, int procState2) {
return sProcStateToProcMem[procState1] != sProcStateToProcMem[procState2];
}
public static long minTimeFromStateChange(boolean test) {
return test ? PSS_TEST_MIN_TIME_FROM_STATE_CHANGE : PSS_MIN_TIME_FROM_STATE_CHANGE;
}
public static void commitNextPssTime(ProcStateMemTracker tracker) {
if (tracker.mPendingMemState >= 0) {
tracker.mHighestMem[tracker.mPendingMemState] = tracker.mPendingHighestMemState;
tracker.mScalingFactor[tracker.mPendingMemState] = tracker.mPendingScalingFactor;
tracker.mTotalHighestMem = tracker.mPendingHighestMemState;
tracker.mPendingMemState = -1;
}
}
public static void abortNextPssTime(ProcStateMemTracker tracker) {
tracker.mPendingMemState = -1;
}
public static long computeNextPssTime(int procState, ProcStateMemTracker tracker, boolean test,
boolean sleeping, long now) {
boolean first;
float scalingFactor;
final int memState = sProcStateToProcMem[procState];
if (tracker != null) {
final int highestMemState = memState < tracker.mTotalHighestMem
? memState : tracker.mTotalHighestMem;
first = highestMemState < tracker.mHighestMem[memState];
tracker.mPendingMemState = memState;
tracker.mPendingHighestMemState = highestMemState;
if (first) {
tracker.mPendingScalingFactor = scalingFactor = 1.0f;
} else {
scalingFactor = tracker.mScalingFactor[memState];
tracker.mPendingScalingFactor = scalingFactor * 1.5f;
}
} else {
first = true;
scalingFactor = 1.0f;
}
final long[] table = test
? (first
? sTestFirstPssTimes
: sTestSamePssTimes)
: (first
? (sleeping ? sFirstAsleepPssTimes : sFirstAwakePssTimes)
: (sleeping ? sSameAsleepPssTimes : sSameAwakePssTimes));
long delay = (long)(table[memState] * scalingFactor);
if (delay > PSS_MAX_INTERVAL) {
delay = PSS_MAX_INTERVAL;
}
return now + delay;
}
long getMemLevel(int adjustment) {
for (int i = 0; i < mOomAdj.length; i++) {
if (adjustment <= mOomAdj[i]) {
return mOomMinFree[i] * 1024;
}
}
return mOomMinFree[mOomAdj.length - 1] * 1024;
}
/**
* Return the maximum pss size in kb that we consider a process acceptable to
* restore from its cached state for running in the background when RAM is low.
*/
long getCachedRestoreThresholdKb() {
return mCachedRestoreLevel;
}
/**
* Set the out-of-memory badness adjustment for a process.
* If {@code pid <= 0}, this method will be a no-op.
*
* @param pid The process identifier to set.
* @param uid The uid of the app
* @param amt Adjustment value -- lmkd allows -16 to +15.
*
* {@hide}
*/
public static final void setOomAdj(int pid, int uid, int amt) {
// This indicates that the process is not started yet and so no need to proceed further.
if (pid <= 0) {
return;
}
if (amt == UNKNOWN_ADJ)
return;
long start = SystemClock.elapsedRealtime();
ByteBuffer buf = ByteBuffer.allocate(4 * 4);
buf.putInt(LMK_PROCPRIO);
buf.putInt(pid);
buf.putInt(uid);
buf.putInt(amt);
writeLmkd(buf, null);
long now = SystemClock.elapsedRealtime();
if ((now-start) > 250) {
Slog.w("ActivityManager", "SLOW OOM ADJ: " + (now-start) + "ms for pid " + pid
+ " = " + amt);
}
}
/*
* {@hide}
*/
public static final void remove(int pid) {
// This indicates that the process is not started yet and so no need to proceed further.
if (pid <= 0) {
return;
}
ByteBuffer buf = ByteBuffer.allocate(4 * 2);
buf.putInt(LMK_PROCREMOVE);
buf.putInt(pid);
writeLmkd(buf, null);
}
/*
* {@hide}
*/
public static final Integer getLmkdKillCount(int min_oom_adj, int max_oom_adj) {
ByteBuffer buf = ByteBuffer.allocate(4 * 3);
ByteBuffer repl = ByteBuffer.allocate(4 * 2);
buf.putInt(LMK_GETKILLCNT);
buf.putInt(min_oom_adj);
buf.putInt(max_oom_adj);
if (writeLmkd(buf, repl)) {
int i = repl.getInt();
if (i != LMK_GETKILLCNT) {
Slog.e("ActivityManager", "Failed to get kill count, code mismatch");
return null;
}
return new Integer(repl.getInt());
}
return null;
}
@GuardedBy("sLmkdSocketLock")
private static boolean openLmkdSocketLS() {
try {
sLmkdSocket = new LocalSocket(LocalSocket.SOCKET_SEQPACKET);
sLmkdSocket.connect(
new LocalSocketAddress("lmkd",
LocalSocketAddress.Namespace.RESERVED));
sLmkdOutputStream = sLmkdSocket.getOutputStream();
sLmkdInputStream = sLmkdSocket.getInputStream();
} catch (IOException ex) {
Slog.w(TAG, "lowmemorykiller daemon socket open failed");
sLmkdSocket = null;
return false;
}
return true;
}
// Never call directly, use writeLmkd() instead
@GuardedBy("sLmkdSocketLock")
private static boolean writeLmkdCommandLS(ByteBuffer buf) {
try {
sLmkdOutputStream.write(buf.array(), 0, buf.position());
} catch (IOException ex) {
Slog.w(TAG, "Error writing to lowmemorykiller socket");
IoUtils.closeQuietly(sLmkdSocket);
sLmkdSocket = null;
return false;
}
return true;
}
// Never call directly, use writeLmkd() instead
@GuardedBy("sLmkdSocketLock")
private static boolean readLmkdReplyLS(ByteBuffer buf) {
int len;
try {
len = sLmkdInputStream.read(buf.array(), 0, buf.array().length);
if (len == buf.array().length) {
return true;
}
} catch (IOException ex) {
Slog.w(TAG, "Error reading from lowmemorykiller socket");
}
IoUtils.closeQuietly(sLmkdSocket);
sLmkdSocket = null;
return false;
}
private static boolean writeLmkd(ByteBuffer buf, ByteBuffer repl) {
synchronized (sLmkdSocketLock) {
for (int i = 0; i < 3; i++) {
if (sLmkdSocket == null) {
if (openLmkdSocketLS() == false) {
try {
Thread.sleep(1000);
} catch (InterruptedException ie) {
}
continue;
}
// Purge any previously registered pids
ByteBuffer purge_buf = ByteBuffer.allocate(4);
purge_buf.putInt(LMK_PROCPURGE);
if (writeLmkdCommandLS(purge_buf) == false) {
// Write failed, skip the rest and retry
continue;
}
}
if (writeLmkdCommandLS(buf) && (repl == null || readLmkdReplyLS(repl))) {
return true;
}
}
}
return false;
}
static void killProcessGroup(int uid, int pid) {
/* static; one-time init here */
if (sKillHandler != null) {
sKillHandler.sendMessage(
sKillHandler.obtainMessage(KillHandler.KILL_PROCESS_GROUP_MSG, uid, pid));
} else {
Slog.w(TAG, "Asked to kill process group before system bringup!");
Process.killProcessGroup(uid, pid);
}
}
final ProcessRecord getProcessRecordLocked(String processName, int uid, boolean
keepIfLarge) {
if (uid == SYSTEM_UID) {
// The system gets to run in any process. If there are multiple
// processes with the same uid, just pick the first (this
// should never happen).
SparseArray<ProcessRecord> procs = mProcessNames.getMap().get(processName);
if (procs == null) return null;
final int procCount = procs.size();
for (int i = 0; i < procCount; i++) {
final int procUid = procs.keyAt(i);
if (UserHandle.isApp(procUid) || !UserHandle.isSameUser(procUid, uid)) {
// Don't use an app process or different user process for system component.
continue;
}
return procs.valueAt(i);
}
}
ProcessRecord proc = mProcessNames.get(processName, uid);
if (false && proc != null && !keepIfLarge
&& proc.setProcState >= ActivityManager.PROCESS_STATE_CACHED_EMPTY
&& proc.lastCachedPss >= 4000) {
// Turn this condition on to cause killing to happen regularly, for testing.
if (proc.baseProcessTracker != null) {
proc.baseProcessTracker.reportCachedKill(proc.pkgList.mPkgList, proc.lastCachedPss);
for (int ipkg = proc.pkgList.size() - 1; ipkg >= 0; ipkg--) {
ProcessStats.ProcessStateHolder holder = proc.pkgList.valueAt(ipkg);
StatsLog.write(StatsLog.CACHED_KILL_REPORTED,
proc.info.uid,
holder.state.getName(),
holder.state.getPackage(),
proc.lastCachedPss, holder.appVersion);
}
}
proc.kill(Long.toString(proc.lastCachedPss) + "k from cached", true);
} else if (proc != null && !keepIfLarge
&& mService.mLastMemoryLevel > ProcessStats.ADJ_MEM_FACTOR_NORMAL
&& proc.setProcState >= ActivityManager.PROCESS_STATE_CACHED_EMPTY) {
if (DEBUG_PSS) Slog.d(TAG_PSS, "May not keep " + proc + ": pss=" + proc
.lastCachedPss);
if (proc.lastCachedPss >= getCachedRestoreThresholdKb()) {
if (proc.baseProcessTracker != null) {
proc.baseProcessTracker.reportCachedKill(proc.pkgList.mPkgList,
proc.lastCachedPss);
for (int ipkg = proc.pkgList.size() - 1; ipkg >= 0; ipkg--) {
ProcessStats.ProcessStateHolder holder = proc.pkgList.valueAt(ipkg);
StatsLog.write(StatsLog.CACHED_KILL_REPORTED,
proc.info.uid,
holder.state.getName(),
holder.state.getPackage(),
proc.lastCachedPss, holder.appVersion);
}
}
proc.kill(Long.toString(proc.lastCachedPss) + "k from cached", true);
}
}
return proc;
}
void getMemoryInfo(ActivityManager.MemoryInfo outInfo) {
final long homeAppMem = getMemLevel(HOME_APP_ADJ);
final long cachedAppMem = getMemLevel(CACHED_APP_MIN_ADJ);
outInfo.availMem = getFreeMemory();
outInfo.totalMem = getTotalMemory();
outInfo.threshold = homeAppMem;
outInfo.lowMemory = outInfo.availMem < (homeAppMem + ((cachedAppMem-homeAppMem)/2));
outInfo.hiddenAppThreshold = cachedAppMem;
outInfo.secondaryServerThreshold = getMemLevel(SERVICE_ADJ);
outInfo.visibleAppThreshold = getMemLevel(VISIBLE_APP_ADJ);
outInfo.foregroundAppThreshold = getMemLevel(FOREGROUND_APP_ADJ);
}
ProcessRecord findAppProcessLocked(IBinder app, String reason) {
final int NP = mProcessNames.getMap().size();
for (int ip = 0; ip < NP; ip++) {
SparseArray<ProcessRecord> apps = mProcessNames.getMap().valueAt(ip);
final int NA = apps.size();
for (int ia = 0; ia < NA; ia++) {
ProcessRecord p = apps.valueAt(ia);
if (p.thread != null && p.thread.asBinder() == app) {
return p;
}
}
}
Slog.w(TAG, "Can't find mystery application for " + reason
+ " from pid=" + Binder.getCallingPid()
+ " uid=" + Binder.getCallingUid() + ": " + app);
return null;
}
private void checkSlow(long startTime, String where) {
long now = SystemClock.uptimeMillis();
if ((now - startTime) > 50) {
// If we are taking more than 50ms, log about it.
Slog.w(TAG, "Slow operation: " + (now - startTime) + "ms so far, now at " + where);
}
}
/**
* @return {@code true} if process start is successful, false otherwise.
* @param app
* @param hostingType
* @param hostingNameStr
* @param disableHiddenApiChecks
* @param abiOverride
*/
@GuardedBy("mService")
boolean startProcessLocked(ProcessRecord app, String hostingType,
String hostingNameStr, boolean disableHiddenApiChecks, boolean mountExtStorageFull,
String abiOverride) {
if (app.pendingStart) {
return true;
}
long startTime = SystemClock.elapsedRealtime();
if (app.pid > 0 && app.pid != ActivityManagerService.MY_PID) {
checkSlow(startTime, "startProcess: removing from pids map");
mService.mPidsSelfLocked.remove(app.pid);
mService.mHandler.removeMessages(PROC_START_TIMEOUT_MSG, app);
checkSlow(startTime, "startProcess: done removing from pids map");
app.setPid(0);
}
if (DEBUG_PROCESSES && mService.mProcessesOnHold.contains(app)) Slog.v(
TAG_PROCESSES,
"startProcessLocked removing on hold: " + app);
mService.mProcessesOnHold.remove(app);
checkSlow(startTime, "startProcess: starting to update cpu stats");
mService.updateCpuStats();
checkSlow(startTime, "startProcess: done updating cpu stats");
try {
try {
final int userId = UserHandle.getUserId(app.uid);
AppGlobals.getPackageManager().checkPackageStartable(app.info.packageName, userId);
} catch (RemoteException e) {
throw e.rethrowAsRuntimeException();
}
int uid = app.uid;
int[] gids = null;
int mountExternal = Zygote.MOUNT_EXTERNAL_NONE;
if (!app.isolated) {
int[] permGids = null;
try {
checkSlow(startTime, "startProcess: getting gids from package manager");
final IPackageManager pm = AppGlobals.getPackageManager();
permGids = pm.getPackageGids(app.info.packageName,
MATCH_DIRECT_BOOT_AUTO, app.userId);
if (StorageManager.hasIsolatedStorage() && mountExtStorageFull) {
mountExternal = Zygote.MOUNT_EXTERNAL_FULL;
} else {
StorageManagerInternal storageManagerInternal = LocalServices.getService(
StorageManagerInternal.class);
mountExternal = storageManagerInternal.getExternalStorageMountMode(uid,
app.info.packageName);
}
} catch (RemoteException e) {
throw e.rethrowAsRuntimeException();
}
/*
* Add shared application and profile GIDs so applications can share some
* resources like shared libraries and access user-wide resources
*/
if (ArrayUtils.isEmpty(permGids)) {
gids = new int[3];
} else {
gids = new int[permGids.length + 3];
System.arraycopy(permGids, 0, gids, 3, permGids.length);
}
gids[0] = UserHandle.getSharedAppGid(UserHandle.getAppId(uid));
gids[1] = UserHandle.getCacheAppGid(UserHandle.getAppId(uid));
gids[2] = UserHandle.getUserGid(UserHandle.getUserId(uid));
// Replace any invalid GIDs
if (gids[0] == UserHandle.ERR_GID) gids[0] = gids[2];
if (gids[1] == UserHandle.ERR_GID) gids[1] = gids[2];
}
app.mountMode = mountExternal;
checkSlow(startTime, "startProcess: building args");
if (mService.mAtmInternal.isFactoryTestProcess(app.getWindowProcessController())) {
uid = 0;
}
int runtimeFlags = 0;
if ((app.info.flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0) {
runtimeFlags |= Zygote.DEBUG_ENABLE_JDWP;
runtimeFlags |= Zygote.DEBUG_JAVA_DEBUGGABLE;
// Also turn on CheckJNI for debuggable apps. It's quite
// awkward to turn on otherwise.
runtimeFlags |= Zygote.DEBUG_ENABLE_CHECKJNI;
}
// Run the app in safe mode if its manifest requests so or the
// system is booted in safe mode.
if ((app.info.flags & ApplicationInfo.FLAG_VM_SAFE_MODE) != 0 ||
mService.mSafeMode == true) {
runtimeFlags |= Zygote.DEBUG_ENABLE_SAFEMODE;
}
if ("1".equals(SystemProperties.get("debug.checkjni"))) {
runtimeFlags |= Zygote.DEBUG_ENABLE_CHECKJNI;
}
String genDebugInfoProperty = SystemProperties.get("debug.generate-debug-info");
if ("1".equals(genDebugInfoProperty) || "true".equals(genDebugInfoProperty)) {
runtimeFlags |= Zygote.DEBUG_GENERATE_DEBUG_INFO;
}
String genMiniDebugInfoProperty = SystemProperties.get("dalvik.vm.minidebuginfo");
if ("1".equals(genMiniDebugInfoProperty) || "true".equals(genMiniDebugInfoProperty)) {
runtimeFlags |= Zygote.DEBUG_GENERATE_MINI_DEBUG_INFO;
}
if ("1".equals(SystemProperties.get("debug.jni.logging"))) {
runtimeFlags |= Zygote.DEBUG_ENABLE_JNI_LOGGING;
}
if ("1".equals(SystemProperties.get("debug.assert"))) {
runtimeFlags |= Zygote.DEBUG_ENABLE_ASSERT;
}
if (mService.mNativeDebuggingApp != null
&& mService.mNativeDebuggingApp.equals(app.processName)) {
// Enable all debug flags required by the native debugger.
runtimeFlags |= Zygote.DEBUG_ALWAYS_JIT; // Don't interpret anything
runtimeFlags |= Zygote.DEBUG_GENERATE_DEBUG_INFO; // Generate debug info
runtimeFlags |= Zygote.DEBUG_NATIVE_DEBUGGABLE; // Disbale optimizations
mService.mNativeDebuggingApp = null;
}
if ((app.info.privateFlags & ApplicationInfo.PRIVATE_FLAG_PREFER_CODE_INTEGRITY) != 0
|| (app.info.isPrivilegedApp()
&& DexManager.isPackageSelectedToRunOob(app.pkgList.mPkgList.keySet()))) {
runtimeFlags |= Zygote.ONLY_USE_SYSTEM_OAT_FILES;
}
if (!disableHiddenApiChecks && !mService.mHiddenApiBlacklist.isDisabled()) {
app.info.maybeUpdateHiddenApiEnforcementPolicy(
mService.mHiddenApiBlacklist.getPolicy());
@ApplicationInfo.HiddenApiEnforcementPolicy int policy =
app.info.getHiddenApiEnforcementPolicy();
int policyBits = (policy << Zygote.API_ENFORCEMENT_POLICY_SHIFT);
if ((policyBits & Zygote.API_ENFORCEMENT_POLICY_MASK) != policyBits) {
throw new IllegalStateException("Invalid API policy: " + policy);
}
runtimeFlags |= policyBits;
}
String invokeWith = null;
if ((app.info.flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0) {
// Debuggable apps may include a wrapper script with their library directory.
String wrapperFileName = app.info.nativeLibraryDir + "/wrap.sh";
StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
try {
if (new File(wrapperFileName).exists()) {
invokeWith = "/system/bin/logwrapper " + wrapperFileName;
}
} finally {
StrictMode.setThreadPolicy(oldPolicy);
}
}
String requiredAbi = (abiOverride != null) ? abiOverride : app.info.primaryCpuAbi;
if (requiredAbi == null) {
requiredAbi = Build.SUPPORTED_ABIS[0];
}
String instructionSet = null;
if (app.info.primaryCpuAbi != null) {
instructionSet = VMRuntime.getInstructionSet(app.info.primaryCpuAbi);
}
app.gids = gids;
app.setRequiredAbi(requiredAbi);
app.instructionSet = instructionSet;
// the per-user SELinux context must be set
if (TextUtils.isEmpty(app.info.seInfoUser)) {
Slog.wtf(ActivityManagerService.TAG, "SELinux tag not defined",
new IllegalStateException("SELinux tag not defined for "
+ app.info.packageName + " (uid " + app.uid + ")"));
}
final String seInfo = app.info.seInfo
+ (TextUtils.isEmpty(app.info.seInfoUser) ? "" : app.info.seInfoUser);
// Start the process. It will either succeed and return a result containing
// the PID of the new process, or else throw a RuntimeException.
final String entryPoint = "android.app.ActivityThread";
return startProcessLocked(hostingType, hostingNameStr, entryPoint, app, uid, gids,
runtimeFlags, mountExternal, seInfo, requiredAbi, instructionSet, invokeWith,
startTime);
} catch (RuntimeException e) {
Slog.e(ActivityManagerService.TAG, "Failure starting process " + app.processName, e);
// Something went very wrong while trying to start this process; one
// common case is when the package is frozen due to an active
// upgrade. To recover, clean up any active bookkeeping related to
// starting this process. (We already invoked this method once when
// the package was initially frozen through KILL_APPLICATION_MSG, so
// it doesn't hurt to use it again.)
mService.forceStopPackageLocked(app.info.packageName, UserHandle.getAppId(app.uid),
false, false, true, false, false, app.userId, "start failure");
return false;
}
}
@GuardedBy("mService")
boolean startProcessLocked(String hostingType, String hostingNameStr,
String entryPoint,
ProcessRecord app, int uid, int[] gids, int runtimeFlags, int mountExternal,
String seInfo, String requiredAbi, String instructionSet, String invokeWith,
long startTime) {
app.pendingStart = true;
app.killedByAm = false;
app.removed = false;
app.killed = false;
final long startSeq = app.startSeq = ++mProcStartSeqCounter;
app.setStartParams(uid, hostingType, hostingNameStr, seInfo, startTime);
if (mService.mConstants.FLAG_PROCESS_START_ASYNC) {
if (DEBUG_PROCESSES) Slog.i(TAG_PROCESSES,
"Posting procStart msg for " + app.toShortString());
mService.mProcStartHandler.post(() -> {
try {
synchronized (mService) {
final String reason = isProcStartValidLocked(app, startSeq);
if (reason != null) {
Slog.w(TAG_PROCESSES, app + " not valid anymore,"
+ " don't start process, " + reason);
app.pendingStart = false;
return;
}
app.setUsingWrapper(invokeWith != null
|| SystemProperties.get("wrap." + app.processName) != null);
mPendingStarts.put(startSeq, app);
}
final Process.ProcessStartResult startResult = startProcess(app.hostingType,
entryPoint, app, app.startUid, gids, runtimeFlags, mountExternal,
app.seInfo, requiredAbi, instructionSet, invokeWith, app.startTime);
synchronized (mService) {
handleProcessStartedLocked(app, startResult, startSeq);
}
} catch (RuntimeException e) {
synchronized (mService) {
Slog.e(ActivityManagerService.TAG, "Failure starting process "
+ app.processName, e);
mPendingStarts.remove(startSeq);
app.pendingStart = false;
mService.forceStopPackageLocked(app.info.packageName,
UserHandle.getAppId(app.uid),
false, false, true, false, false, app.userId, "start failure");
}
}
});
return true;
} else {
try {
final Process.ProcessStartResult startResult = startProcess(hostingType,
entryPoint, app,
uid, gids, runtimeFlags, mountExternal, seInfo, requiredAbi, instructionSet,
invokeWith, startTime);
handleProcessStartedLocked(app, startResult.pid, startResult.usingWrapper,
startSeq, false);
} catch (RuntimeException e) {
Slog.e(ActivityManagerService.TAG, "Failure starting process "
+ app.processName, e);
app.pendingStart = false;
mService.forceStopPackageLocked(app.info.packageName, UserHandle.getAppId(app.uid),
false, false, true, false, false, app.userId, "start failure");
}
return app.pid > 0;
}
}
@GuardedBy("mService")
public void killAppZygoteIfNeededLocked(AppZygote appZygote) {
final ApplicationInfo appInfo = appZygote.getAppInfo();
ArrayList<ProcessRecord> zygoteProcesses = mAppZygoteProcesses.get(appZygote);
if (zygoteProcesses.size() == 0) { // Only remove if no longer in use now
mAppZygotes.remove(appInfo.processName, appInfo.uid);
mAppZygoteProcesses.remove(appZygote);
mAppIsolatedUidRangeAllocator.freeUidRangeLocked(appInfo);
appZygote.stopZygote();
}
}
@GuardedBy("mService")
private void removeProcessFromAppZygoteLocked(final ProcessRecord app) {
// Free the isolated uid for this process
final IsolatedUidRange appUidRange =
mAppIsolatedUidRangeAllocator.getIsolatedUidRangeLocked(app.info);
if (appUidRange != null) {
appUidRange.freeIsolatedUidLocked(app.uid);
}
final AppZygote appZygote = mAppZygotes.get(app.info.processName, app.info.uid);
if (appZygote != null) {
ArrayList<ProcessRecord> zygoteProcesses = mAppZygoteProcesses.get(appZygote);
zygoteProcesses.remove(app);
if (zygoteProcesses.size() == 0) {
Message msg = mService.mHandler.obtainMessage(KILL_APP_ZYGOTE_MSG);
msg.obj = appZygote;
mService.mHandler.sendMessageDelayed(msg, KILL_APP_ZYGOTE_DELAY_MS);
}
}
}
private AppZygote createAppZygoteForProcessIfNeeded(final ProcessRecord app) {
synchronized (mService) {
AppZygote appZygote = mAppZygotes.get(app.info.processName, app.info.uid);
final ArrayList<ProcessRecord> zygoteProcessList;
if (appZygote == null) {
final IsolatedUidRange uidRange =
mAppIsolatedUidRangeAllocator.getIsolatedUidRangeLocked(app.info);
final int userId = UserHandle.getUserId(app.info.uid);
// Create the app-zygote and provide it with the UID-range it's allowed
// to setresuid/setresgid to.
final int firstUid = UserHandle.getUid(userId, uidRange.mFirstUid);
final int lastUid = UserHandle.getUid(userId, uidRange.mLastUid);
appZygote = new AppZygote(app.info, app.info.uid, firstUid, lastUid);
mAppZygotes.put(app.info.processName, app.info.uid, appZygote);
zygoteProcessList = new ArrayList<ProcessRecord>();
mAppZygoteProcesses.put(appZygote, zygoteProcessList);
} else {
mService.mHandler.removeMessages(KILL_APP_ZYGOTE_MSG, appZygote);
zygoteProcessList = mAppZygoteProcesses.get(appZygote);
}
// Note that we already add the app to mAppZygoteProcesses here;
// this is so that another thread can't come in and kill the zygote
// before we've even tried to start the process. If the process launch
// goes wrong, we'll clean this up in removeProcessNameLocked()
zygoteProcessList.add(app);
return appZygote;
}
}
private Process.ProcessStartResult startProcess(String hostingType, String entryPoint,
ProcessRecord app, int uid, int[] gids, int runtimeFlags, int mountExternal,
String seInfo, String requiredAbi, String instructionSet, String invokeWith,
long startTime) {
try {
final String[] packageNames = mService.mContext.getPackageManager()
.getPackagesForUid(uid);
final String[] visibleVolIds = LocalServices.getService(StorageManagerInternal.class)
.getVisibleVolumesForUser(UserHandle.getUserId(uid));
Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "Start proc: " +
app.processName);
checkSlow(startTime, "startProcess: asking zygote to start proc");
final Process.ProcessStartResult startResult;
if (hostingType.equals("webview_service")) {
startResult = startWebView(entryPoint,
app.processName, uid, uid, gids, runtimeFlags, mountExternal,
app.info.targetSdkVersion, seInfo, requiredAbi, instructionSet,
app.info.dataDir, null, app.info.packageName,
packageNames, visibleVolIds,
new String[] {PROC_START_SEQ_IDENT + app.startSeq});
} else if (hostingType.equals("app_zygote")) {
final AppZygote appZygote = createAppZygoteForProcessIfNeeded(app);
startResult = appZygote.getProcess().start(entryPoint,
app.processName, uid, uid, gids, runtimeFlags, mountExternal,
app.info.targetSdkVersion, seInfo, requiredAbi, instructionSet,
app.info.dataDir, null, app.info.packageName,
packageNames, visibleVolIds,
new String[] {PROC_START_SEQ_IDENT + app.startSeq});
} else {
startResult = Process.start(entryPoint,
app.processName, uid, uid, gids, runtimeFlags, mountExternal,
app.info.targetSdkVersion, seInfo, requiredAbi, instructionSet,
app.info.dataDir, invokeWith, app.info.packageName,
packageNames, visibleVolIds,
new String[] {PROC_START_SEQ_IDENT + app.startSeq});
}
checkSlow(startTime, "startProcess: returned from zygote!");
return startResult;
} finally {
Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
}
}
@GuardedBy("mService")
final void startProcessLocked(ProcessRecord app,
String hostingType, String hostingNameStr) {
startProcessLocked(app, hostingType, hostingNameStr, null /* abiOverride */);
}
@GuardedBy("mService")
final boolean startProcessLocked(ProcessRecord app,
String hostingType, String hostingNameStr, String abiOverride) {
return startProcessLocked(app, hostingType, hostingNameStr,
false /* disableHiddenApiChecks */, false /* mountExtStorageFull */, abiOverride);
}
@GuardedBy("mService")
final ProcessRecord startProcessLocked(String processName, ApplicationInfo info,
boolean knownToBeDead, int intentFlags, String hostingType, ComponentName hostingName,
boolean allowWhileBooting, boolean isolated, int isolatedUid, boolean keepIfLarge,
String abiOverride, String entryPoint, String[] entryPointArgs, Runnable crashHandler) {
long startTime = SystemClock.elapsedRealtime();
ProcessRecord app;
if (!isolated) {
app = getProcessRecordLocked(processName, info.uid, keepIfLarge);
checkSlow(startTime, "startProcess: after getProcessRecord");
if ((intentFlags & Intent.FLAG_FROM_BACKGROUND) != 0) {
// If we are in the background, then check to see if this process
// is bad. If so, we will just silently fail.
if (mService.mAppErrors.isBadProcessLocked(info)) {
if (DEBUG_PROCESSES) Slog.v(TAG, "Bad process: " + info.uid
+ "/" + info.processName);
return null;
}
} else {
// When the user is explicitly starting a process, then clear its
// crash count so that we won't make it bad until they see at
// least one crash dialog again, and make the process good again
// if it had been bad.
if (DEBUG_PROCESSES) Slog.v(TAG, "Clearing bad process: " + info.uid
+ "/" + info.processName);
mService.mAppErrors.resetProcessCrashTimeLocked(info);
if (mService.mAppErrors.isBadProcessLocked(info)) {
EventLog.writeEvent(EventLogTags.AM_PROC_GOOD,
UserHandle.getUserId(info.uid), info.uid,
info.processName);
mService.mAppErrors.clearBadProcessLocked(info);
if (app != null) {
app.bad = false;
}
}
}
} else {
// If this is an isolated process, it can't re-use an existing process.
app = null;
}
// We don't have to do anything more if:
// (1) There is an existing application record; and
// (2) The caller doesn't think it is dead, OR there is no thread
// object attached to it so we know it couldn't have crashed; and
// (3) There is a pid assigned to it, so it is either starting or
// already running.
if (DEBUG_PROCESSES) Slog.v(TAG_PROCESSES, "startProcess: name=" + processName
+ " app=" + app + " knownToBeDead=" + knownToBeDead
+ " thread=" + (app != null ? app.thread : null)
+ " pid=" + (app != null ? app.pid : -1));
if (app != null && app.pid > 0) {
if ((!knownToBeDead && !app.killed) || app.thread == null) {
// We already have the app running, or are waiting for it to
// come up (we have a pid but not yet its thread), so keep it.
if (DEBUG_PROCESSES) Slog.v(TAG_PROCESSES, "App already running: " + app);
// If this is a new package in the process, add the package to the list
app.addPackage(info.packageName, info.versionCode, mService.mProcessStats);
checkSlow(startTime, "startProcess: done, added package to proc");
return app;
}
// An application record is attached to a previous process,
// clean it up now.
if (DEBUG_PROCESSES) Slog.v(TAG_PROCESSES, "App died: " + app);
checkSlow(startTime, "startProcess: bad proc running, killing");
ProcessList.killProcessGroup(app.uid, app.pid);
mService.handleAppDiedLocked(app, true, true);
checkSlow(startTime, "startProcess: done killing old proc");
}
String hostingNameStr = hostingName != null
? hostingName.flattenToShortString() : null;
if (app == null) {
final boolean fromAppZygote = "app_zygote".equals(hostingType);
checkSlow(startTime, "startProcess: creating new process record");
app = newProcessRecordLocked(info, processName, isolated, isolatedUid, fromAppZygote);
if (app == null) {
Slog.w(TAG, "Failed making new process record for "
+ processName + "/" + info.uid + " isolated=" + isolated);
return null;
}
app.crashHandler = crashHandler;
app.isolatedEntryPoint = entryPoint;
app.isolatedEntryPointArgs = entryPointArgs;
checkSlow(startTime, "startProcess: done creating new process record");
} else {
// If this is a new package in the process, add the package to the list
app.addPackage(info.packageName, info.versionCode, mService.mProcessStats);
checkSlow(startTime, "startProcess: added package to existing proc");
}
// If the system is not ready yet, then hold off on starting this
// process until it is.
if (!mService.mProcessesReady
&& !mService.isAllowedWhileBooting(info)
&& !allowWhileBooting) {
if (!mService.mProcessesOnHold.contains(app)) {
mService.mProcessesOnHold.add(app);
}
if (DEBUG_PROCESSES) Slog.v(TAG_PROCESSES,
"System not ready, putting on hold: " + app);
checkSlow(startTime, "startProcess: returning with proc on hold");
return app;
}
checkSlow(startTime, "startProcess: stepping in to startProcess");
final boolean success = startProcessLocked(app, hostingType, hostingNameStr,
abiOverride);
checkSlow(startTime, "startProcess: done starting proc!");
return success ? app : null;
}
@GuardedBy("mService")
private String isProcStartValidLocked(ProcessRecord app, long expectedStartSeq) {
StringBuilder sb = null;
if (app.killedByAm) {
if (sb == null) sb = new StringBuilder();
sb.append("killedByAm=true;");
}
if (mProcessNames.get(app.processName, app.uid) != app) {
if (sb == null) sb = new StringBuilder();
sb.append("No entry in mProcessNames;");
}
if (!app.pendingStart) {
if (sb == null) sb = new StringBuilder();
sb.append("pendingStart=false;");
}
if (app.startSeq > expectedStartSeq) {
if (sb == null) sb = new StringBuilder();
sb.append("seq=" + app.startSeq + ",expected=" + expectedStartSeq + ";");
}
return sb == null ? null : sb.toString();
}
@GuardedBy("mService")
private boolean handleProcessStartedLocked(ProcessRecord pending,
Process.ProcessStartResult startResult, long expectedStartSeq) {
// Indicates that this process start has been taken care of.
if (mPendingStarts.get(expectedStartSeq) == null) {
if (pending.pid == startResult.pid) {
pending.setUsingWrapper(startResult.usingWrapper);
// TODO: Update already existing clients of usingWrapper
}
return false;
}
return handleProcessStartedLocked(pending, startResult.pid, startResult.usingWrapper,
expectedStartSeq, false);
}
@GuardedBy("mService")
boolean handleProcessStartedLocked(ProcessRecord app, int pid, boolean usingWrapper,
long expectedStartSeq, boolean procAttached) {
mPendingStarts.remove(expectedStartSeq);
final String reason = isProcStartValidLocked(app, expectedStartSeq);
if (reason != null) {
Slog.w(TAG_PROCESSES, app + " start not valid, killing pid=" +
pid
+ ", " + reason);
app.pendingStart = false;
killProcessQuiet(pid);
Process.killProcessGroup(app.uid, app.pid);
return false;
}
mService.mBatteryStatsService.noteProcessStart(app.processName, app.info.uid);
checkSlow(app.startTime, "startProcess: done updating battery stats");
EventLog.writeEvent(EventLogTags.AM_PROC_START,
UserHandle.getUserId(app.startUid), pid, app.startUid,
app.processName, app.hostingType,
app.hostingNameStr != null ? app.hostingNameStr : "");
try {
AppGlobals.getPackageManager().logAppProcessStartIfNeeded(app.processName, app.uid,
app.seInfo, app.info.sourceDir, pid);
} catch (RemoteException ex) {
// Ignore
}
if (app.isPersistent()) {
Watchdog.getInstance().processStarted(app.processName, pid);
}
checkSlow(app.startTime, "startProcess: building log message");
StringBuilder buf = mStringBuilder;
buf.setLength(0);
buf.append("Start proc ");
buf.append(pid);
buf.append(':');
buf.append(app.processName);
buf.append('/');
UserHandle.formatUid(buf, app.startUid);
if (app.isolatedEntryPoint != null) {
buf.append(" [");
buf.append(app.isolatedEntryPoint);
buf.append("]");
}
buf.append(" for ");
buf.append(app.hostingType);
if (app.hostingNameStr != null) {
buf.append(" ");
buf.append(app.hostingNameStr);
}
mService.reportUidInfoMessageLocked(TAG, buf.toString(), app.startUid);
app.setPid(pid);
app.setUsingWrapper(usingWrapper);
app.pendingStart = false;
checkSlow(app.startTime, "startProcess: starting to update pids map");
ProcessRecord oldApp;
synchronized (mService.mPidsSelfLocked) {
oldApp = mService.mPidsSelfLocked.get(pid);
}
// If there is already an app occupying that pid that hasn't been cleaned up
if (oldApp != null && !app.isolated) {
// Clean up anything relating to this pid first
Slog.w(TAG, "Reusing pid " + pid
+ " while app is still mapped to it");
mService.cleanUpApplicationRecordLocked(oldApp, false, false, -1,
true /*replacingPid*/);
}
mService.mPidsSelfLocked.put(pid, app);
synchronized (mService.mPidsSelfLocked) {
if (!procAttached) {
Message msg = mService.mHandler.obtainMessage(PROC_START_TIMEOUT_MSG);
msg.obj = app;
mService.mHandler.sendMessageDelayed(msg, usingWrapper
? PROC_START_TIMEOUT_WITH_WRAPPER : PROC_START_TIMEOUT);
}
}
checkSlow(app.startTime, "startProcess: done updating pids map");
return true;
}
final void removeLruProcessLocked(ProcessRecord app) {
int lrui = mLruProcesses.lastIndexOf(app);
if (lrui >= 0) {
if (!app.killed) {
if (app.isPersistent()) {
Slog.w(TAG, "Removing persistent process that hasn't been killed: " + app);
} else {
Slog.wtfStack(TAG, "Removing process that hasn't been killed: " + app);
if (app.pid > 0) {
killProcessQuiet(app.pid);
ProcessList.killProcessGroup(app.uid, app.pid);
} else {
app.pendingStart = false;
}
}
}
if (lrui <= mLruProcessActivityStart) {
mLruProcessActivityStart--;
}
if (lrui <= mLruProcessServiceStart) {
mLruProcessServiceStart--;
}
mLruProcesses.remove(lrui);
}
}
void killAllBackgroundProcessesLocked() {
final ArrayList<ProcessRecord> procs = new ArrayList<>();
final int NP = mProcessNames.getMap().size();
for (int ip = 0; ip < NP; ip++) {
final SparseArray<ProcessRecord> apps = mProcessNames.getMap().valueAt(ip);
final int NA = apps.size();
for (int ia = 0; ia < NA; ia++) {
final ProcessRecord app = apps.valueAt(ia);
if (app.isPersistent()) {
// We don't kill persistent processes.
continue;
}
if (app.removed) {
procs.add(app);
} else if (app.setAdj >= ProcessList.CACHED_APP_MIN_ADJ) {
app.removed = true;
procs.add(app);
}
}
}
final int N = procs.size();
for (int i = 0; i < N; i++) {
removeProcessLocked(procs.get(i), false, true, "kill all background");
}
}
@GuardedBy("mService")
final boolean killPackageProcessesLocked(String packageName, int appId,
int userId, int minOomAdj, boolean callerWillRestart, boolean allowRestart,
boolean doit, boolean evenPersistent, String reason) {
ArrayList<ProcessRecord> procs = new ArrayList<>();
// Remove all processes this package may have touched: all with the
// same UID (except for the system or root user), and all whose name
// matches the package name.
final int NP = mProcessNames.getMap().size();
for (int ip = 0; ip < NP; ip++) {
SparseArray<ProcessRecord> apps = mProcessNames.getMap().valueAt(ip);
final int NA = apps.size();
for (int ia = 0; ia < NA; ia++) {
ProcessRecord app = apps.valueAt(ia);
if (app.isPersistent() && !evenPersistent) {
// we don't kill persistent processes
continue;
}
if (app.removed) {
if (doit) {
procs.add(app);
}
continue;
}
// Skip process if it doesn't meet our oom adj requirement.
if (app.setAdj < minOomAdj) {
continue;
}
// If no package is specified, we call all processes under the
// give user id.
if (packageName == null) {
if (userId != UserHandle.USER_ALL && app.userId != userId) {
continue;
}
if (appId >= 0 && UserHandle.getAppId(app.uid) != appId) {
continue;
}
// Package has been specified, we want to hit all processes
// that match it. We need to qualify this by the processes
// that are running under the specified app and user ID.
} else {
final boolean isDep = app.pkgDeps != null
&& app.pkgDeps.contains(packageName);
if (!isDep && UserHandle.getAppId(app.uid) != appId) {
continue;
}
if (userId != UserHandle.USER_ALL && app.userId != userId) {
continue;
}
if (!app.pkgList.containsKey(packageName) && !isDep) {
continue;
}
}
// Process has passed all conditions, kill it!
if (!doit) {
return true;
}
app.removed = true;
procs.add(app);
}
}
int N = procs.size();
for (int i=0; i<N; i++) {
removeProcessLocked(procs.get(i), callerWillRestart, allowRestart, reason);
}
mService.updateOomAdjLocked();
return N > 0;
}
@GuardedBy("mService")
boolean removeProcessLocked(ProcessRecord app,
boolean callerWillRestart, boolean allowRestart, String reason) {
final String name = app.processName;
final int uid = app.uid;
if (DEBUG_PROCESSES) Slog.d(TAG_PROCESSES,
"Force removing proc " + app.toShortString() + " (" + name + "/" + uid + ")");
ProcessRecord old = mProcessNames.get(name, uid);
if (old != app) {
// This process is no longer active, so nothing to do.
Slog.w(TAG, "Ignoring remove of inactive process: " + app);
return false;
}
removeProcessNameLocked(name, uid);
mService.mAtmInternal.clearHeavyWeightProcessIfEquals(app.getWindowProcessController());
boolean needRestart = false;
if ((app.pid > 0 && app.pid != ActivityManagerService.MY_PID) || (app.pid == 0 && app
.pendingStart)) {
int pid = app.pid;
if (pid > 0) {
mService.mPidsSelfLocked.remove(pid);
mService.mHandler.removeMessages(PROC_START_TIMEOUT_MSG, app);
mService.mBatteryStatsService.noteProcessFinish(app.processName, app.info.uid);
if (app.isolated) {
mService.mBatteryStatsService.removeIsolatedUid(app.uid, app.info.uid);
mService.getPackageManagerInternalLocked().removeIsolatedUid(app.uid);
}
}
boolean willRestart = false;
if (app.isPersistent() && !app.isolated) {
if (!callerWillRestart) {
willRestart = true;
} else {
needRestart = true;
}
}
app.kill(reason, true);
mService.handleAppDiedLocked(app, willRestart, allowRestart);
if (willRestart) {
removeLruProcessLocked(app);
mService.addAppLocked(app.info, null, false, null /* ABI override */);
}
} else {
mRemovedProcesses.add(app);
}
return needRestart;
}
@GuardedBy("mService")
final void addProcessNameLocked(ProcessRecord proc) {
// We shouldn't already have a process under this name, but just in case we
// need to clean up whatever may be there now.
ProcessRecord old = removeProcessNameLocked(proc.processName, proc.uid);
if (old == proc && proc.isPersistent()) {
// We are re-adding a persistent process. Whatevs! Just leave it there.
Slog.w(TAG, "Re-adding persistent process " + proc);
} else if (old != null) {
Slog.wtf(TAG, "Already have existing proc " + old + " when adding " + proc);
}
UidRecord uidRec = mActiveUids.get(proc.uid);
if (uidRec == null) {
uidRec = new UidRecord(proc.uid, mService.mAtmInternal);
// This is the first appearance of the uid, report it now!
if (DEBUG_UID_OBSERVERS) Slog.i(TAG_UID_OBSERVERS,
"Creating new process uid: " + uidRec);
if (Arrays.binarySearch(mService.mDeviceIdleTempWhitelist,
UserHandle.getAppId(proc.uid)) >= 0
|| mService.mPendingTempWhitelist.indexOfKey(proc.uid) >= 0) {
uidRec.setWhitelist = uidRec.curWhitelist = true;
}
uidRec.updateHasInternetPermission();
mActiveUids.put(proc.uid, uidRec);
EventLogTags.writeAmUidRunning(uidRec.uid);
mService.noteUidProcessState(uidRec.uid, uidRec.getCurProcState());
}
proc.uidRecord = uidRec;
// Reset render thread tid if it was already set, so new process can set it again.
proc.renderThreadTid = 0;
uidRec.numProcs++;
mProcessNames.put(proc.processName, proc.uid, proc);
if (proc.isolated) {
mIsolatedProcesses.put(proc.uid, proc);
}
}
@GuardedBy("mService")
private IsolatedUidRange getOrCreateIsolatedUidRangeLocked(ApplicationInfo info,
boolean fromAppZygote) {
if (!fromAppZygote) {
// Allocate an isolated UID from the global range
return mGlobalIsolatedUids;
} else {
return mAppIsolatedUidRangeAllocator.getOrCreateIsolatedUidRangeLocked(info);
}
}
@GuardedBy("mService")
final ProcessRecord newProcessRecordLocked(ApplicationInfo info, String customProcess,
boolean isolated, int isolatedUid, boolean fromAppZygote) {
String proc = customProcess != null ? customProcess : info.processName;
final int userId = UserHandle.getUserId(info.uid);
int uid = info.uid;
if (isolated) {
if (isolatedUid == 0) {
IsolatedUidRange uidRange = getOrCreateIsolatedUidRangeLocked(info, fromAppZygote);
if (uidRange == null) {
return null;
}
uid = uidRange.allocateIsolatedUidLocked(userId);
if (uid == -1) {
return null;
}
} else {
// Special case for startIsolatedProcess (internal only), where
// the uid of the isolated process is specified by the caller.
uid = isolatedUid;
}
mService.getPackageManagerInternalLocked().addIsolatedUid(uid, info.uid);
// Register the isolated UID with this application so BatteryStats knows to
// attribute resource usage to the application.
//
// NOTE: This is done here before addProcessNameLocked, which will tell BatteryStats
// about the process state of the isolated UID *before* it is registered with the
// owning application.
mService.mBatteryStatsService.addIsolatedUid(uid, info.uid);
StatsLog.write(StatsLog.ISOLATED_UID_CHANGED, info.uid, uid,
StatsLog.ISOLATED_UID_CHANGED__EVENT__CREATED);
}
final ProcessRecord r = new ProcessRecord(mService, info, proc, uid);
if (!mService.mBooted && !mService.mBooting
&& userId == UserHandle.USER_SYSTEM
&& (info.flags & PERSISTENT_MASK) == PERSISTENT_MASK) {
// The system process is initialized to SCHED_GROUP_DEFAULT in init.rc.
r.setCurrentSchedulingGroup(ProcessList.SCHED_GROUP_DEFAULT);
r.setSchedGroup = ProcessList.SCHED_GROUP_DEFAULT;
r.setPersistent(true);
r.maxAdj = ProcessList.PERSISTENT_PROC_ADJ;
}
if (isolated && isolatedUid != 0) {
// Special case for startIsolatedProcess (internal only) - assume the process
// is required by the system server to prevent it being killed.
r.maxAdj = ProcessList.PERSISTENT_SERVICE_ADJ;
}
addProcessNameLocked(r);
return r;
}
@GuardedBy("mService")
final ProcessRecord removeProcessNameLocked(final String name, final int uid) {
return removeProcessNameLocked(name, uid, null);
}
@GuardedBy("mService")
final ProcessRecord removeProcessNameLocked(final String name, final int uid,
final ProcessRecord expecting) {
ProcessRecord old = mProcessNames.get(name, uid);
// Only actually remove when the currently recorded value matches the
// record that we expected; if it doesn't match then we raced with a
// newly created process and we don't want to destroy the new one.
if ((expecting == null) || (old == expecting)) {
mProcessNames.remove(name, uid);
}
if (old != null && old.uidRecord != null) {
old.uidRecord.numProcs--;
if (old.uidRecord.numProcs == 0) {
// No more processes using this uid, tell clients it is gone.
if (DEBUG_UID_OBSERVERS) Slog.i(TAG_UID_OBSERVERS,
"No more processes in " + old.uidRecord);
mService.enqueueUidChangeLocked(old.uidRecord, -1, UidRecord.CHANGE_GONE);
EventLogTags.writeAmUidStopped(uid);
mActiveUids.remove(uid);
mService.noteUidProcessState(uid, ActivityManager.PROCESS_STATE_NONEXISTENT);
}
old.uidRecord = null;
}
mIsolatedProcesses.remove(uid);
mGlobalIsolatedUids.freeIsolatedUidLocked(uid);
// Remove the (expected) ProcessRecord from the app zygote
final ProcessRecord record = expecting != null ? expecting : old;
if (record != null && record.appZygote) {
removeProcessFromAppZygoteLocked(record);
}
return old;
}
/** Call setCoreSettings on all LRU processes, with the new settings. */
@GuardedBy("mService")
void updateCoreSettingsLocked(Bundle settings) {
for (int i = mLruProcesses.size() - 1; i >= 0; i--) {
ProcessRecord processRecord = mLruProcesses.get(i);
try {
if (processRecord.thread != null) {
processRecord.thread.setCoreSettings(settings);
}
} catch (RemoteException re) {
/* ignore */
}
}
}
/**
* Kill all background processes except for ones with targetSdk lower than minTargetSdk and
* procstate lower than maxProcState.
* @param minTargetSdk
* @param maxProcState
*/
@GuardedBy("mService")
void killAllBackgroundProcessesExceptLocked(int minTargetSdk, int maxProcState) {
final ArrayList<ProcessRecord> procs = new ArrayList<>();
final int NP = mProcessNames.getMap().size();
for (int ip = 0; ip < NP; ip++) {
final SparseArray<ProcessRecord> apps = mProcessNames.getMap().valueAt(ip);
final int NA = apps.size();
for (int ia = 0; ia < NA; ia++) {
final ProcessRecord app = apps.valueAt(ia);
if (app.removed) {
procs.add(app);
} else if ((minTargetSdk < 0 || app.info.targetSdkVersion < minTargetSdk)
&& (maxProcState < 0 || app.setProcState > maxProcState)) {
app.removed = true;
procs.add(app);
}
}
}
final int N = procs.size();
for (int i = 0; i < N; i++) {
removeProcessLocked(procs.get(i), false, true, "kill all background except");
}
}
/**
* Call updateTimePrefs on all LRU processes
* @param timePref The time pref to pass to each process
*/
@GuardedBy("mService")
void updateAllTimePrefsLocked(int timePref) {
for (int i = mLruProcesses.size() - 1; i >= 0; i--) {
ProcessRecord r = mLruProcesses.get(i);
if (r.thread != null) {
try {
r.thread.updateTimePrefs(timePref);
} catch (RemoteException ex) {
Slog.w(TAG, "Failed to update preferences for: "
+ r.info.processName);
}
}
}
}
@GuardedBy("mService")
void setAllHttpProxyLocked(String host, String port, String exclList, Uri pacFileUrl) {
for (int i = mLruProcesses.size() - 1; i >= 0; i--) {
ProcessRecord r = mLruProcesses.get(i);
// Don't dispatch to isolated processes as they can't access
// ConnectivityManager and don't have network privileges anyway.
if (r.thread != null && !r.isolated) {
try {
r.thread.setHttpProxy(host, port, exclList, pacFileUrl);
} catch (RemoteException ex) {
Slog.w(TAG, "Failed to update http proxy for: " +
r.info.processName);
}
}
}
}
@GuardedBy("mService")
void clearAllDnsCacheLocked() {
for (int i = mLruProcesses.size() - 1; i >= 0; i--) {
ProcessRecord r = mLruProcesses.get(i);
if (r.thread != null) {
try {
r.thread.clearDnsCache();
} catch (RemoteException ex) {
Slog.w(TAG, "Failed to clear dns cache for: " + r.info.processName);
}
}
}
}
@GuardedBy("mService")
void handleAllTrustStorageUpdateLocked() {
for (int i = mLruProcesses.size() - 1; i >= 0; i--) {
ProcessRecord r = mLruProcesses.get(i);
if (r.thread != null) {
try {
r.thread.handleTrustStorageUpdate();
} catch (RemoteException ex) {
Slog.w(TAG, "Failed to handle trust storage update for: " +
r.info.processName);
}
}
}
}
@GuardedBy("mService")
int updateLruProcessInternalLocked(ProcessRecord app, long now, int index,
int lruSeq, String what, Object obj, ProcessRecord srcApp) {
app.lastActivityTime = now;
if (app.hasActivitiesOrRecentTasks()) {
// Don't want to touch dependent processes that are hosting activities.
return index;
}
int lrui = mLruProcesses.lastIndexOf(app);
if (lrui < 0) {
Slog.wtf(TAG, "Adding dependent process " + app + " not on LRU list: "
+ what + " " + obj + " from " + srcApp);
return index;
}
if (lrui >= index) {
// Don't want to cause this to move dependent processes *back* in the
// list as if they were less frequently used.
return index;
}
if (lrui >= mLruProcessActivityStart && index < mLruProcessActivityStart) {
// Don't want to touch dependent processes that are hosting activities.
return index;
}
mLruProcesses.remove(lrui);
if (index > 0) {
index--;
}
if (DEBUG_LRU) Slog.d(TAG_LRU, "Moving dep from " + lrui + " to " + index
+ " in LRU list: " + app);
mLruProcesses.add(index, app);
app.lruSeq = lruSeq;
return index;
}
/**
* Handle the case where we are inserting a process hosting client activities:
* Make sure any groups have their order match their importance, and take care of
* distributing old clients across other activity processes so they can't spam
* the LRU list. Processing of the list will be restricted by the indices provided,
* and not extend out of them.
*
* @param topApp The app at the top that has just been inserted in to the list.
* @param topI The position in the list where topApp was inserted; this is the start (at the
* top) where we are going to do our processing.
* @param bottomI The last position at which we will be processing; this is the end position
* of whichever section of the LRU list we are in. Nothing past it will be
* touched.
* @param endIndex The current end of the top being processed. Typically topI - 1. That is,
* where we are going to start potentially adjusting other entries in the list.
*/
private void updateClientActivitiesOrdering(final ProcessRecord topApp, final int topI,
final int bottomI, int endIndex) {
if (topApp.hasActivitiesOrRecentTasks() || topApp.treatLikeActivity
|| !topApp.hasClientActivities()) {
// If this is not a special process that has client activities, then there is
// nothing to do.
return;
}
final int uid = topApp.info.uid;
if (topApp.connectionGroup > 0) {
int endImportance = topApp.connectionImportance;
for (int i = endIndex; i >= bottomI; i--) {
final ProcessRecord subProc = mLruProcesses.get(i);
if (subProc.info.uid == uid
&& subProc.connectionGroup == topApp.connectionGroup) {
if (i == endIndex && subProc.connectionImportance >= endImportance) {
// This process is already in the group, and its importance
// is not as strong as the process before it, so keep it
// correctly positioned in the group.
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Keeping in-place above " + subProc
+ " endImportance=" + endImportance
+ " group=" + subProc.connectionGroup
+ " importance=" + subProc.connectionImportance);
endIndex--;
endImportance = subProc.connectionImportance;
} else {
// We want to pull this up to be with the rest of the group,
// and order within the group by importance.
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Pulling up " + subProc
+ " to position in group with importance="
+ subProc.connectionImportance);
boolean moved = false;
for (int pos = topI; pos > endIndex; pos--) {
final ProcessRecord posProc = mLruProcesses.get(pos);
if (subProc.connectionImportance
<= posProc.connectionImportance) {
mLruProcesses.remove(i);
mLruProcesses.add(pos, subProc);
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Moving " + subProc
+ " from position " + i + " to above " + posProc
+ " @ " + pos);
moved = true;
endIndex--;
break;
}
}
if (!moved) {
// Goes to the end of the group.
mLruProcesses.remove(i);
mLruProcesses.add(endIndex - 1, subProc);
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Moving " + subProc
+ " from position " + i + " to end of group @ "
+ endIndex);
endIndex--;
endImportance = subProc.connectionImportance;
}
}
}
}
}
// To keep it from spamming the LRU list (by making a bunch of clients),
// we will distribute other entries owned by it to be in-between other apps.
int i = endIndex;
while (i >= bottomI) {
ProcessRecord subProc = mLruProcesses.get(i);
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Looking to spread old procs, at " + subProc + " @ " + i);
if (subProc.info.uid != uid) {
// This is a different app... if we have gone through some of the
// target app, pull this up to be before them. We want to pull up
// one activity process, but any number of non-activity processes.
if (i < endIndex) {
boolean hasActivity = false;
int connUid = 0;
int connGroup = 0;
while (i >= bottomI) {
mLruProcesses.remove(i);
mLruProcesses.add(endIndex, subProc);
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Different app, moving to " + endIndex);
i--;
if (i < bottomI) {
break;
}
subProc = mLruProcesses.get(i);
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Looking at next app at " + i + ": " + subProc);
if (subProc.hasActivitiesOrRecentTasks() || subProc.treatLikeActivity) {
if (DEBUG_LRU) Slog.d(TAG_LRU,
"This is hosting an activity!");
if (hasActivity) {
// Already found an activity, done.
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Already found an activity, done");
break;
}
hasActivity = true;
} else if (subProc.hasClientActivities()) {
if (DEBUG_LRU) Slog.d(TAG_LRU,
"This is a client of an activity");
if (hasActivity) {
if (connUid == 0 || connUid != subProc.info.uid) {
// Already have an activity that is not from from a client
// connection or is a different client connection, done.
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Already found a different activity: connUid="
+ connUid + " uid=" + subProc.info.uid);
break;
} else if (connGroup == 0 || connGroup != subProc.connectionGroup) {
// Previously saw a different group or not from a group,
// want to treat these as different things.
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Already found a different group: connGroup="
+ connGroup + " group=" + subProc.connectionGroup);
break;
}
} else {
if (DEBUG_LRU) Slog.d(TAG_LRU,
"This is an activity client! uid="
+ subProc.info.uid + " group=" + subProc.connectionGroup);
hasActivity = true;
connUid = subProc.info.uid;
connGroup = subProc.connectionGroup;
}
}
endIndex--;
}
}
// Find the end of the next group of processes for target app. This
// is after any entries of different apps (so we don't change the existing
// relative order of apps) and then after the next last group of processes
// of the target app.
for (endIndex--; endIndex >= bottomI; endIndex--) {
final ProcessRecord endProc = mLruProcesses.get(endIndex);
if (endProc.info.uid == uid) {
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Found next group of app: " + endProc + " @ "
+ endIndex);
break;
}
}
if (endIndex >= bottomI) {
final ProcessRecord endProc = mLruProcesses.get(endIndex);
for (endIndex--; endIndex >= bottomI; endIndex--) {
final ProcessRecord nextEndProc = mLruProcesses.get(endIndex);
if (nextEndProc.info.uid != uid
|| nextEndProc.connectionGroup != endProc.connectionGroup) {
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Found next group or app: " + nextEndProc + " @ "
+ endIndex + " group=" + nextEndProc.connectionGroup);
break;
}
}
}
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Bumping scan position to " + endIndex);
i = endIndex;
} else {
i--;
}
}
}
final void updateLruProcessLocked(ProcessRecord app, boolean activityChange,
ProcessRecord client) {
final boolean hasActivity = app.hasActivitiesOrRecentTasks() || app.hasClientActivities()
|| app.treatLikeActivity;
final boolean hasService = false; // not impl yet. app.services.size() > 0;
if (!activityChange && hasActivity) {
// The process has activities, so we are only allowing activity-based adjustments
// to move it. It should be kept in the front of the list with other
// processes that have activities, and we don't want those to change their
// order except due to activity operations.
return;
}
mLruSeq++;
final long now = SystemClock.uptimeMillis();
app.lastActivityTime = now;
// First a quick reject: if the app is already at the position we will
// put it, then there is nothing to do.
if (hasActivity) {
final int N = mLruProcesses.size();
if (N > 0 && mLruProcesses.get(N - 1) == app) {
if (DEBUG_LRU) Slog.d(TAG_LRU, "Not moving, already top activity: " + app);
return;
}
} else {
if (mLruProcessServiceStart > 0
&& mLruProcesses.get(mLruProcessServiceStart-1) == app) {
if (DEBUG_LRU) Slog.d(TAG_LRU, "Not moving, already top other: " + app);
return;
}
}
int lrui = mLruProcesses.lastIndexOf(app);
if (app.isPersistent() && lrui >= 0) {
// We don't care about the position of persistent processes, as long as
// they are in the list.
if (DEBUG_LRU) Slog.d(TAG_LRU, "Not moving, persistent: " + app);
return;
}
/* In progress: compute new position first, so we can avoid doing work
if the process is not actually going to move. Not yet working.
int addIndex;
int nextIndex;
boolean inActivity = false, inService = false;
if (hasActivity) {
// Process has activities, put it at the very tipsy-top.
addIndex = mLruProcesses.size();
nextIndex = mLruProcessServiceStart;
inActivity = true;
} else if (hasService) {
// Process has services, put it at the top of the service list.
addIndex = mLruProcessActivityStart;
nextIndex = mLruProcessServiceStart;
inActivity = true;
inService = true;
} else {
// Process not otherwise of interest, it goes to the top of the non-service area.
addIndex = mLruProcessServiceStart;
if (client != null) {
int clientIndex = mLruProcesses.lastIndexOf(client);
if (clientIndex < 0) Slog.d(TAG, "Unknown client " + client + " when updating "
+ app);
if (clientIndex >= 0 && addIndex > clientIndex) {
addIndex = clientIndex;
}
}
nextIndex = addIndex > 0 ? addIndex-1 : addIndex;
}
Slog.d(TAG, "Update LRU at " + lrui + " to " + addIndex + " (act="
+ mLruProcessActivityStart + "): " + app);
*/
if (lrui >= 0) {
if (lrui < mLruProcessActivityStart) {
mLruProcessActivityStart--;
}
if (lrui < mLruProcessServiceStart) {
mLruProcessServiceStart--;
}
/*
if (addIndex > lrui) {
addIndex--;
}
if (nextIndex > lrui) {
nextIndex--;
}
*/
mLruProcesses.remove(lrui);
}
/*
mLruProcesses.add(addIndex, app);
if (inActivity) {
mLruProcessActivityStart++;
}
if (inService) {
mLruProcessActivityStart++;
}
*/
int nextIndex;
int nextActivityIndex = -1;
if (hasActivity) {
final int N = mLruProcesses.size();
nextIndex = mLruProcessServiceStart;
if (!app.hasActivitiesOrRecentTasks() && !app.treatLikeActivity
&& mLruProcessActivityStart < (N - 1)) {
// Process doesn't have activities, but has clients with
// activities... move it up, but below the app that is binding to it.
if (DEBUG_LRU) Slog.d(TAG_LRU,
"Adding to second-top of LRU activity list: " + app
+ " group=" + app.connectionGroup
+ " importance=" + app.connectionImportance);
int pos = N - 1;
while (pos > mLruProcessActivityStart) {
final ProcessRecord posproc = mLruProcesses.get(pos);
if (posproc.info.uid == app.info.uid) {
// Technically this app could have multiple processes with different
// activities and so we should be looking for the actual process that
// is bound to the target proc... but I don't really care, do you?
break;
}
pos--;
}
mLruProcesses.add(pos, app);
// If this process is part of a group, need to pull up any other processes
// in that group to be with it.
int endIndex = pos - 1;
if (endIndex < mLruProcessActivityStart) {
endIndex = mLruProcessActivityStart;
}
nextActivityIndex = endIndex;
updateClientActivitiesOrdering(app, pos, mLruProcessActivityStart, endIndex);
} else {
// Process has activities, put it at the very tipsy-top.
if (DEBUG_LRU) Slog.d(TAG_LRU, "Adding to top of LRU activity list: " + app);
mLruProcesses.add(app);
nextActivityIndex = mLruProcesses.size() - 1;
}
} else if (hasService) {
// Process has services, put it at the top of the service list.
if (DEBUG_LRU) Slog.d(TAG_LRU, "Adding to top of LRU service list: " + app);
mLruProcesses.add(mLruProcessActivityStart, app);
nextIndex = mLruProcessServiceStart;
mLruProcessActivityStart++;
} else {
// Process not otherwise of interest, it goes to the top of the non-service area.
int index = mLruProcessServiceStart;
if (client != null) {
// If there is a client, don't allow the process to be moved up higher
// in the list than that client.
int clientIndex = mLruProcesses.lastIndexOf(client);
if (DEBUG_LRU && clientIndex < 0) Slog.d(TAG_LRU, "Unknown client " + client
+ " when updating " + app);
if (clientIndex <= lrui) {
// Don't allow the client index restriction to push it down farther in the
// list than it already is.
clientIndex = lrui;
}
if (clientIndex >= 0 && index > clientIndex) {
index = clientIndex;
}
}
if (DEBUG_LRU) Slog.d(TAG_LRU, "Adding at " + index + " of LRU list: " + app);
mLruProcesses.add(index, app);
nextIndex = index - 1;
mLruProcessActivityStart++;
mLruProcessServiceStart++;
if (index > 1) {
updateClientActivitiesOrdering(app, mLruProcessServiceStart - 1, 0, index - 1);
}
}
app.lruSeq = mLruSeq;
// If the app is currently using a content provider or service,
// bump those processes as well.
for (int j = app.connections.size() - 1; j >= 0; j--) {
ConnectionRecord cr = app.connections.valueAt(j);
if (cr.binding != null && !cr.serviceDead && cr.binding.service != null
&& cr.binding.service.app != null
&& cr.binding.service.app.lruSeq != mLruSeq
&& (cr.flags & Context.BIND_REDUCTION_FLAGS) == 0
&& !cr.binding.service.app.isPersistent()) {
if (cr.binding.service.app.hasClientActivities()) {
if (nextActivityIndex >= 0) {
nextActivityIndex = updateLruProcessInternalLocked(cr.binding.service.app,
now,
nextActivityIndex, mLruSeq,
"service connection", cr, app);
}
} else {
nextIndex = updateLruProcessInternalLocked(cr.binding.service.app,
now,
nextIndex, mLruSeq,
"service connection", cr, app);
}
}
}
for (int j = app.conProviders.size() - 1; j >= 0; j--) {
ContentProviderRecord cpr = app.conProviders.get(j).provider;
if (cpr.proc != null && cpr.proc.lruSeq != mLruSeq && !cpr.proc.isPersistent()) {
nextIndex = updateLruProcessInternalLocked(cpr.proc, now, nextIndex, mLruSeq,
"provider reference", cpr, app);
}
}
}
final ProcessRecord getLRURecordForAppLocked(IApplicationThread thread) {
final IBinder threadBinder = thread.asBinder();
// Find the application record.
for (int i = mLruProcesses.size() - 1; i >= 0; i--) {
final ProcessRecord rec = mLruProcesses.get(i);
if (rec.thread != null && rec.thread.asBinder() == threadBinder) {
return rec;
}
}
return null;
}
boolean haveBackgroundProcessLocked() {
for (int i = mLruProcesses.size() - 1; i >= 0; i--) {
final ProcessRecord rec = mLruProcesses.get(i);
if (rec.thread != null
&& rec.setProcState >= PROCESS_STATE_CACHED_ACTIVITY) {
return true;
}
}
return false;
}
private static int procStateToImportance(int procState, int memAdj,
ActivityManager.RunningAppProcessInfo currApp,
int clientTargetSdk) {
int imp = ActivityManager.RunningAppProcessInfo.procStateToImportanceForTargetSdk(
procState, clientTargetSdk);
if (imp == ActivityManager.RunningAppProcessInfo.IMPORTANCE_BACKGROUND) {
currApp.lru = memAdj;
} else {
currApp.lru = 0;
}
return imp;
}
@GuardedBy("mService")
void fillInProcMemInfoLocked(ProcessRecord app,
ActivityManager.RunningAppProcessInfo outInfo,
int clientTargetSdk) {
outInfo.pid = app.pid;
outInfo.uid = app.info.uid;
if (mService.mAtmInternal.isHeavyWeightProcess(app.getWindowProcessController())) {
outInfo.flags |= ActivityManager.RunningAppProcessInfo.FLAG_CANT_SAVE_STATE;
}
if (app.isPersistent()) {
outInfo.flags |= ActivityManager.RunningAppProcessInfo.FLAG_PERSISTENT;
}
if (app.hasActivities()) {
outInfo.flags |= ActivityManager.RunningAppProcessInfo.FLAG_HAS_ACTIVITIES;
}
outInfo.lastTrimLevel = app.trimMemoryLevel;
int adj = app.curAdj;
int procState = app.getCurProcState();
outInfo.importance = procStateToImportance(procState, adj, outInfo,
clientTargetSdk);
outInfo.importanceReasonCode = app.adjTypeCode;
outInfo.processState = app.getCurProcState();
outInfo.isFocused = (app == mService.getTopAppLocked());
outInfo.lastActivityTime = app.lastActivityTime;
}
@GuardedBy("mService")
List<ActivityManager.RunningAppProcessInfo> getRunningAppProcessesLocked(boolean allUsers,
int userId, boolean allUids, int callingUid, int clientTargetSdk) {
// Lazy instantiation of list
List<ActivityManager.RunningAppProcessInfo> runList = null;
for (int i = mLruProcesses.size() - 1; i >= 0; i--) {
ProcessRecord app = mLruProcesses.get(i);
if ((!allUsers && app.userId != userId)
|| (!allUids && app.uid != callingUid)) {
continue;
}
if ((app.thread != null) && (!app.isCrashing() && !app.isNotResponding())) {
// Generate process state info for running application
ActivityManager.RunningAppProcessInfo currApp =
new ActivityManager.RunningAppProcessInfo(app.processName,
app.pid, app.getPackageList());
fillInProcMemInfoLocked(app, currApp, clientTargetSdk);
if (app.adjSource instanceof ProcessRecord) {
currApp.importanceReasonPid = ((ProcessRecord)app.adjSource).pid;
currApp.importanceReasonImportance =
ActivityManager.RunningAppProcessInfo.procStateToImportance(
app.adjSourceProcState);
} else if (app.adjSource instanceof ActivityServiceConnectionsHolder) {
final ActivityServiceConnectionsHolder r =
(ActivityServiceConnectionsHolder) app.adjSource;
final int pid = r.getActivityPid();
if (pid != -1) {
currApp.importanceReasonPid = pid;
}
}
if (app.adjTarget instanceof ComponentName) {
currApp.importanceReasonComponent = (ComponentName)app.adjTarget;
}
//Slog.v(TAG, "Proc " + app.processName + ": imp=" + currApp.importance
// + " lru=" + currApp.lru);
if (runList == null) {
runList = new ArrayList<>();
}
runList.add(currApp);
}
}
return runList;
}
@GuardedBy("mService")
int getLruSizeLocked() {
return mLruProcesses.size();
}
@GuardedBy("mService")
void dumpLruListHeaderLocked(PrintWriter pw) {
pw.print(" Process LRU list (sorted by oom_adj, "); pw.print(mLruProcesses.size());
pw.print(" total, non-act at ");
pw.print(mLruProcesses.size() - mLruProcessActivityStart);
pw.print(", non-svc at ");
pw.print(mLruProcesses.size() - mLruProcessServiceStart);
pw.println("):");
}
@GuardedBy("mService")
ArrayList<ProcessRecord> collectProcessesLocked(int start, boolean allPkgs, String[] args) {
ArrayList<ProcessRecord> procs;
if (args != null && args.length > start
&& args[start].charAt(0) != '-') {
procs = new ArrayList<ProcessRecord>();
int pid = -1;
try {
pid = Integer.parseInt(args[start]);
} catch (NumberFormatException e) {
}
for (int i = mLruProcesses.size() - 1; i >= 0; i--) {
ProcessRecord proc = mLruProcesses.get(i);
if (proc.pid > 0 && proc.pid == pid) {
procs.add(proc);
} else if (allPkgs && proc.pkgList != null
&& proc.pkgList.containsKey(args[start])) {
procs.add(proc);
} else if (proc.processName.equals(args[start])) {
procs.add(proc);
}
}
if (procs.size() <= 0) {
return null;
}
} else {
procs = new ArrayList<ProcessRecord>(mLruProcesses);
}
return procs;
}
@GuardedBy("mService")
void updateApplicationInfoLocked(List<String> packagesToUpdate, int userId,
boolean updateFrameworkRes) {
for (int i = mLruProcesses.size() - 1; i >= 0; i--) {
final ProcessRecord app = mLruProcesses.get(i);
if (app.thread == null) {
continue;
}
if (userId != UserHandle.USER_ALL && app.userId != userId) {
continue;
}
final int packageCount = app.pkgList.size();
for (int j = 0; j < packageCount; j++) {
final String packageName = app.pkgList.keyAt(j);
if (updateFrameworkRes || packagesToUpdate.contains(packageName)) {
try {
final ApplicationInfo ai = AppGlobals.getPackageManager()
.getApplicationInfo(packageName, STOCK_PM_FLAGS, app.userId);
if (ai != null) {
app.thread.scheduleApplicationInfoChanged(ai);
}
} catch (RemoteException e) {
Slog.w(TAG, String.format("Failed to update %s ApplicationInfo for %s",
packageName, app));
}
}
}
}
}
@GuardedBy("mService")
void sendPackageBroadcastLocked(int cmd, String[] packages, int userId) {
for (int i = mLruProcesses.size() - 1; i >= 0; i--) {
ProcessRecord r = mLruProcesses.get(i);
if (r.thread != null && (userId == UserHandle.USER_ALL || r.userId == userId)) {
try {
r.thread.dispatchPackageBroadcast(cmd, packages);
} catch (RemoteException ex) {
}
}
}
}
/** Returns the uid's process state or PROCESS_STATE_NONEXISTENT if not running */
@GuardedBy("mService")
int getUidProcStateLocked(int uid) {
UidRecord uidRec = mActiveUids.get(uid);
return uidRec == null ? PROCESS_STATE_NONEXISTENT : uidRec.getCurProcState();
}
/** Returns the UidRecord for the given uid, if it exists. */
@GuardedBy("mService")
UidRecord getUidRecordLocked(int uid) {
return mActiveUids.get(uid);
}
/**
* Call {@link ActivityManagerService#doStopUidLocked}
* (which will also stop background services) for all idle UIDs.
*/
@GuardedBy("mService")
void doStopUidForIdleUidsLocked() {
final int size = mActiveUids.size();
for (int i = 0; i < size; i++) {
final int uid = mActiveUids.keyAt(i);
if (UserHandle.isCore(uid)) {
continue;
}
final UidRecord uidRec = mActiveUids.valueAt(i);
if (!uidRec.idle) {
continue;
}
mService.doStopUidLocked(uidRec.uid, uidRec);
}
}
}