Merge "Add more oom adj update reason codes" into udc-dev
diff --git a/core/java/android/app/ActivityManagerInternal.java b/core/java/android/app/ActivityManagerInternal.java
index 0293bb5..95e446d 100644
--- a/core/java/android/app/ActivityManagerInternal.java
+++ b/core/java/android/app/ActivityManagerInternal.java
@@ -343,7 +343,170 @@
      */
     public abstract boolean hasRunningActivity(int uid, @Nullable String packageName);
 
-    public abstract void updateOomAdj();
+    /**
+     * Oom Adj Reason: none - internal use only, do not use it.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_NONE = 0;
+
+    /**
+     * Oom Adj Reason: activity changes.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_ACTIVITY = 1;
+
+    /**
+     * Oom Adj Reason: finishing a broadcast receiver.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_FINISH_RECEIVER = 2;
+
+    /**
+     * Oom Adj Reason: starting a broadcast receiver.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_START_RECEIVER = 3;
+
+    /**
+     * Oom Adj Reason: binding to a service.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_BIND_SERVICE = 4;
+
+    /**
+     * Oom Adj Reason: unbinding from a service.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_UNBIND_SERVICE = 5;
+
+    /**
+     * Oom Adj Reason: starting a service.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_START_SERVICE = 6;
+
+    /**
+     * Oom Adj Reason: connecting to a content provider.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_GET_PROVIDER = 7;
+
+    /**
+     * Oom Adj Reason: disconnecting from a content provider.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_REMOVE_PROVIDER = 8;
+
+    /**
+     * Oom Adj Reason: UI visibility changes.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_UI_VISIBILITY = 9;
+
+    /**
+     * Oom Adj Reason: device power allowlist changes.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_ALLOWLIST = 10;
+
+    /**
+     * Oom Adj Reason: starting a process.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_PROCESS_BEGIN = 11;
+
+    /**
+     * Oom Adj Reason: ending a process.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_PROCESS_END = 12;
+
+    /**
+     * Oom Adj Reason: short FGS timeout.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_SHORT_FGS_TIMEOUT = 13;
+
+    /**
+     * Oom Adj Reason: system initialization.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_SYSTEM_INIT = 14;
+
+    /**
+     * Oom Adj Reason: backup/restore.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_BACKUP = 15;
+
+    /**
+     * Oom Adj Reason: instrumented by the SHELL.
+     * @hide
+     */
+    public static final int OOM_ADJ_REASON_SHELL = 16;
+
+    /**
+     * Oom Adj Reason: task stack is being removed.
+     */
+    public static final int OOM_ADJ_REASON_REMOVE_TASK = 17;
+
+    /**
+     * Oom Adj Reason: uid idle.
+     */
+    public static final int OOM_ADJ_REASON_UID_IDLE = 18;
+
+    /**
+     * Oom Adj Reason: stop service.
+     */
+    public static final int OOM_ADJ_REASON_STOP_SERVICE = 19;
+
+    /**
+     * Oom Adj Reason: executing service.
+     */
+    public static final int OOM_ADJ_REASON_EXECUTING_SERVICE = 20;
+
+    /**
+     * Oom Adj Reason: background restriction changes.
+     */
+    public static final int OOM_ADJ_REASON_RESTRICTION_CHANGE = 21;
+
+    /**
+     * Oom Adj Reason: A package or its component is disabled.
+     */
+    public static final int OOM_ADJ_REASON_COMPONENT_DISABLED = 22;
+
+    @IntDef(prefix = {"OOM_ADJ_REASON_"}, value = {
+        OOM_ADJ_REASON_NONE,
+        OOM_ADJ_REASON_ACTIVITY,
+        OOM_ADJ_REASON_FINISH_RECEIVER,
+        OOM_ADJ_REASON_START_RECEIVER,
+        OOM_ADJ_REASON_BIND_SERVICE,
+        OOM_ADJ_REASON_UNBIND_SERVICE,
+        OOM_ADJ_REASON_START_SERVICE,
+        OOM_ADJ_REASON_GET_PROVIDER,
+        OOM_ADJ_REASON_REMOVE_PROVIDER,
+        OOM_ADJ_REASON_UI_VISIBILITY,
+        OOM_ADJ_REASON_ALLOWLIST,
+        OOM_ADJ_REASON_PROCESS_BEGIN,
+        OOM_ADJ_REASON_PROCESS_END,
+        OOM_ADJ_REASON_SHORT_FGS_TIMEOUT,
+        OOM_ADJ_REASON_SYSTEM_INIT,
+        OOM_ADJ_REASON_BACKUP,
+        OOM_ADJ_REASON_SHELL,
+        OOM_ADJ_REASON_REMOVE_TASK,
+        OOM_ADJ_REASON_UID_IDLE,
+        OOM_ADJ_REASON_STOP_SERVICE,
+        OOM_ADJ_REASON_EXECUTING_SERVICE,
+        OOM_ADJ_REASON_RESTRICTION_CHANGE,
+        OOM_ADJ_REASON_COMPONENT_DISABLED,
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface OomAdjReason {}
+
+    /**
+     * Request to update oom adj.
+     */
+    public abstract void updateOomAdj(@OomAdjReason int oomAdjReason);
     public abstract void updateCpuStats();
 
     /**
diff --git a/services/core/java/com/android/server/am/ActiveServices.java b/services/core/java/com/android/server/am/ActiveServices.java
index 7b618b1..e248007 100644
--- a/services/core/java/com/android/server/am/ActiveServices.java
+++ b/services/core/java/com/android/server/am/ActiveServices.java
@@ -26,6 +26,17 @@
 import static android.app.ActivityManager.PROCESS_STATE_HEAVY_WEIGHT;
 import static android.app.ActivityManager.PROCESS_STATE_RECEIVER;
 import static android.app.ActivityManager.PROCESS_STATE_TOP;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_BIND_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_COMPONENT_DISABLED;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_EXECUTING_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_NONE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_PROCESS_END;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_REMOVE_TASK;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_SHORT_FGS_TIMEOUT;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_START_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_STOP_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_UID_IDLE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_UNBIND_SERVICE;
 import static android.app.ForegroundServiceTypePolicy.FGS_TYPE_POLICY_CHECK_DEPRECATED;
 import static android.app.ForegroundServiceTypePolicy.FGS_TYPE_POLICY_CHECK_DISABLED;
 import static android.app.ForegroundServiceTypePolicy.FGS_TYPE_POLICY_CHECK_OK;
@@ -117,6 +128,7 @@
 import android.annotation.UserIdInt;
 import android.app.ActivityManager;
 import android.app.ActivityManagerInternal;
+import android.app.ActivityManagerInternal.OomAdjReason;
 import android.app.ActivityManagerInternal.ServiceNotificationPolicy;
 import android.app.ActivityThread;
 import android.app.AppGlobals;
@@ -1146,7 +1158,7 @@
                                             } finally {
                                                 /* Will be a no-op if nothing pending */
                                                 mAm.updateOomAdjPendingTargetsLocked(
-                                                        OomAdjuster.OOM_ADJ_REASON_START_SERVICE);
+                                                        OOM_ADJ_REASON_START_SERVICE);
                                             }
                                         } else {
                                             unbindServiceLocked(connection);
@@ -1236,8 +1248,7 @@
                             /* ignore - local call */
                         } finally {
                             /* Will be a no-op if nothing pending */
-                            mAm.updateOomAdjPendingTargetsLocked(
-                                    OomAdjuster.OOM_ADJ_REASON_START_SERVICE);
+                            mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_START_SERVICE);
                         }
                     } else { // Starting a service
                         try {
@@ -1311,7 +1322,7 @@
                 false /* packageFrozen */,
                 true /* enqueueOomAdj */);
         /* Will be a no-op if nothing pending */
-        mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_START_SERVICE);
+        mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_START_SERVICE);
         if (error != null) {
             return new ComponentName("!!", error);
         }
@@ -1496,7 +1507,7 @@
                     stopServiceLocked(service, true);
                 }
                 if (size > 0) {
-                    mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+                    mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_UID_IDLE);
                 }
             }
         }
@@ -3296,7 +3307,7 @@
 
             Slog.e(TAG_SERVICE, "Short FGS procstate demoted: " + sr);
 
-            mAm.updateOomAdjLocked(sr.app, OomAdjuster.OOM_ADJ_REASON_SHORT_FGS_TIMEOUT);
+            mAm.updateOomAdjLocked(sr.app, OOM_ADJ_REASON_SHORT_FGS_TIMEOUT);
         }
     }
 
@@ -3630,7 +3641,7 @@
                 needOomAdj = true;
                 if (bringUpServiceLocked(s, service.getFlags(), callerFg, false,
                         permissionsReviewRequired, packageFrozen, true) != null) {
-                    mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_BIND_SERVICE);
+                    mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_BIND_SERVICE);
                     return 0;
                 }
             }
@@ -3655,7 +3666,7 @@
                 mAm.enqueueOomAdjTargetLocked(s.app);
             }
             if (needOomAdj) {
-                mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_BIND_SERVICE);
+                mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_BIND_SERVICE);
             }
 
             final int packageState = wasStopped
@@ -3787,7 +3798,8 @@
                     }
                 }
 
-                serviceDoneExecutingLocked(r, mDestroyingServices.contains(r), false, false);
+                serviceDoneExecutingLocked(r, mDestroyingServices.contains(r), false, false,
+                        OOM_ADJ_REASON_EXECUTING_SERVICE);
             }
         } finally {
             Binder.restoreCallingIdentity(origId);
@@ -3878,7 +3890,7 @@
                 }
             }
 
-            mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+            mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_UNBIND_SERVICE);
 
         } finally {
             Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
@@ -3925,7 +3937,8 @@
                     }
                 }
 
-                serviceDoneExecutingLocked(r, inDestroying, false, false);
+                serviceDoneExecutingLocked(r, inDestroying, false, false,
+                        OOM_ADJ_REASON_UNBIND_SERVICE);
             }
         } finally {
             Binder.restoreCallingIdentity(origId);
@@ -4360,11 +4373,11 @@
     /**
      * Bump the given service record into executing state.
      * @param oomAdjReason The caller requests it to perform the oomAdjUpdate not {@link
-     *         OomAdjuster#OOM_ADJ_REASON_NONE}.
+     *         ActivityManagerInternal#OOM_ADJ_REASON_NONE}.
      * @return {@code true} if it performed oomAdjUpdate.
      */
     private boolean bumpServiceExecutingLocked(
-            ServiceRecord r, boolean fg, String why, @OomAdjuster.OomAdjReason int oomAdjReason) {
+            ServiceRecord r, boolean fg, String why, @OomAdjReason int oomAdjReason) {
         if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, ">>> EXECUTING "
                 + why + " of " + r + " in app " + r.app);
         else if (DEBUG_SERVICE_EXECUTING) Slog.v(TAG_SERVICE_EXECUTING, ">>> EXECUTING "
@@ -4416,7 +4429,7 @@
             }
         }
         boolean oomAdjusted = false;
-        if (oomAdjReason != OomAdjuster.OOM_ADJ_REASON_NONE && r.app != null
+        if (oomAdjReason != OOM_ADJ_REASON_NONE && r.app != null
                 && r.app.mState.getCurProcState() > ActivityManager.PROCESS_STATE_SERVICE) {
             // Force an immediate oomAdjUpdate, so the client app could be in the correct process
             // state before doing any service related transactions
@@ -4440,8 +4453,7 @@
                 + " rebind=" + rebind);
         if ((!i.requested || rebind) && i.apps.size() > 0) {
             try {
-                bumpServiceExecutingLocked(r, execInFg, "bind",
-                        OomAdjuster.OOM_ADJ_REASON_BIND_SERVICE);
+                bumpServiceExecutingLocked(r, execInFg, "bind", OOM_ADJ_REASON_BIND_SERVICE);
                 if (Trace.isTagEnabled(Trace.TRACE_TAG_ACTIVITY_MANAGER)) {
                     Trace.instant(Trace.TRACE_TAG_ACTIVITY_MANAGER, "requestServiceBinding="
                             + i.intent.getIntent() + ". bindSeq=" + mBindServiceSeqCounter);
@@ -4457,13 +4469,15 @@
                 // Keep the executeNesting count accurate.
                 if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, "Crashed while binding " + r, e);
                 final boolean inDestroying = mDestroyingServices.contains(r);
-                serviceDoneExecutingLocked(r, inDestroying, inDestroying, false);
+                serviceDoneExecutingLocked(r, inDestroying, inDestroying, false,
+                        OOM_ADJ_REASON_UNBIND_SERVICE);
                 throw e;
             } catch (RemoteException e) {
                 if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, "Crashed while binding " + r);
                 // Keep the executeNesting count accurate.
                 final boolean inDestroying = mDestroyingServices.contains(r);
-                serviceDoneExecutingLocked(r, inDestroying, inDestroying, false);
+                serviceDoneExecutingLocked(r, inDestroying, inDestroying, false,
+                        OOM_ADJ_REASON_UNBIND_SERVICE);
                 return false;
             }
         }
@@ -4841,7 +4855,7 @@
             // Ignore, it's been logged and nothing upstack cares.
         } finally {
             /* Will be a no-op if nothing pending */
-            mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_START_SERVICE);
+            mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_START_SERVICE);
         }
     }
 
@@ -5193,13 +5207,14 @@
 
         final ProcessServiceRecord psr = app.mServices;
         final boolean newService = psr.startService(r);
-        bumpServiceExecutingLocked(r, execInFg, "create", OomAdjuster.OOM_ADJ_REASON_NONE);
+        bumpServiceExecutingLocked(r, execInFg, "create",
+                OOM_ADJ_REASON_NONE /* use "none" to avoid extra oom adj */);
         mAm.updateLruProcessLocked(app, false, null);
         updateServiceForegroundLocked(psr, /* oomAdj= */ false);
         // Force an immediate oomAdjUpdate, so the client app could be in the correct process state
         // before doing any service related transactions
         mAm.enqueueOomAdjTargetLocked(app);
-        mAm.updateOomAdjLocked(app, OomAdjuster.OOM_ADJ_REASON_START_SERVICE);
+        mAm.updateOomAdjLocked(app, OOM_ADJ_REASON_START_SERVICE);
 
         boolean created = false;
         try {
@@ -5233,7 +5248,8 @@
             if (!created) {
                 // Keep the executeNesting count accurate.
                 final boolean inDestroying = mDestroyingServices.contains(r);
-                serviceDoneExecutingLocked(r, inDestroying, inDestroying, false);
+                serviceDoneExecutingLocked(r, inDestroying, inDestroying, false,
+                        OOM_ADJ_REASON_STOP_SERVICE);
 
                 // Cleanup.
                 if (newService) {
@@ -5319,7 +5335,8 @@
             mAm.grantImplicitAccess(r.userId, si.intent, si.callingId,
                     UserHandle.getAppId(r.appInfo.uid)
             );
-            bumpServiceExecutingLocked(r, execInFg, "start", OomAdjuster.OOM_ADJ_REASON_NONE);
+            bumpServiceExecutingLocked(r, execInFg, "start",
+                    OOM_ADJ_REASON_NONE /* use "none" to avoid extra oom adj */);
             if (r.fgRequired && !r.fgWaiting) {
                 if (!r.isForeground) {
                     if (DEBUG_BACKGROUND_CHECK) {
@@ -5345,7 +5362,7 @@
 
         if (!oomAdjusted) {
             mAm.enqueueOomAdjTargetLocked(r.app);
-            mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_START_SERVICE);
+            mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_START_SERVICE);
         }
         ParceledListSlice<ServiceStartArgs> slice = new ParceledListSlice<>(args);
         slice.setInlineCountLimit(4);
@@ -5371,10 +5388,11 @@
             // Keep nesting count correct
             final boolean inDestroying = mDestroyingServices.contains(r);
             for (int i = 0, size = args.size(); i < size; i++) {
-                serviceDoneExecutingLocked(r, inDestroying, inDestroying, true);
+                serviceDoneExecutingLocked(r, inDestroying, inDestroying, true,
+                        OOM_ADJ_REASON_STOP_SERVICE);
             }
             /* Will be a no-op if nothing pending */
-            mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+            mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_STOP_SERVICE);
             if (caughtException instanceof TransactionTooLargeException) {
                 throw (TransactionTooLargeException)caughtException;
             }
@@ -5461,7 +5479,7 @@
                 if (ibr.hasBound) {
                     try {
                         oomAdjusted |= bumpServiceExecutingLocked(r, false, "bring down unbind",
-                                OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+                                OOM_ADJ_REASON_UNBIND_SERVICE);
                         ibr.hasBound = false;
                         ibr.requested = false;
                         r.app.getThread().scheduleUnbindService(r,
@@ -5615,7 +5633,7 @@
                 } else {
                     try {
                         oomAdjusted |= bumpServiceExecutingLocked(r, false, "destroy",
-                                oomAdjusted ? 0 : OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+                                oomAdjusted ? 0 : OOM_ADJ_REASON_STOP_SERVICE);
                         mDestroyingServices.add(r);
                         r.destroying = true;
                         r.app.getThread().scheduleStopService(r);
@@ -5637,7 +5655,7 @@
         if (!oomAdjusted) {
             mAm.enqueueOomAdjTargetLocked(r.app);
             if (!enqueueOomAdj) {
-                mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+                mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_STOP_SERVICE);
             }
         }
         if (r.bindings.size() > 0) {
@@ -5762,8 +5780,7 @@
             if (s.app != null && s.app.getThread() != null && b.intent.apps.size() == 0
                     && b.intent.hasBound) {
                 try {
-                    bumpServiceExecutingLocked(s, false, "unbind",
-                            OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+                    bumpServiceExecutingLocked(s, false, "unbind", OOM_ADJ_REASON_UNBIND_SERVICE);
                     if (b.client != s.app && c.notHasFlag(Context.BIND_WAIVE_PRIORITY)
                             && s.app.mState.getSetProcState() <= PROCESS_STATE_HEAVY_WEIGHT) {
                         // If this service's process is not already in the cached list,
@@ -5886,7 +5903,8 @@
                 }
             }
             final long origId = Binder.clearCallingIdentity();
-            serviceDoneExecutingLocked(r, inDestroying, inDestroying, enqueueOomAdj);
+            serviceDoneExecutingLocked(r, inDestroying, inDestroying, enqueueOomAdj,
+                    OOM_ADJ_REASON_EXECUTING_SERVICE);
             Binder.restoreCallingIdentity(origId);
         } else {
             Slog.w(TAG, "Done executing unknown service from pid "
@@ -5905,11 +5923,11 @@
                 r.tracker.setStarted(false, memFactor, now);
             }
         }
-        serviceDoneExecutingLocked(r, true, true, enqueueOomAdj);
+        serviceDoneExecutingLocked(r, true, true, enqueueOomAdj, OOM_ADJ_REASON_PROCESS_END);
     }
 
     private void serviceDoneExecutingLocked(ServiceRecord r, boolean inDestroying,
-            boolean finishing, boolean enqueueOomAdj) {
+            boolean finishing, boolean enqueueOomAdj, @OomAdjReason int oomAdjReason) {
         if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, "<<< DONE EXECUTING " + r
                 + ": nesting=" + r.executeNesting
                 + ", inDestroying=" + inDestroying + ", app=" + r.app);
@@ -5945,7 +5963,7 @@
                 if (enqueueOomAdj) {
                     mAm.enqueueOomAdjTargetLocked(r.app);
                 } else {
-                    mAm.updateOomAdjLocked(r.app, OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+                    mAm.updateOomAdjLocked(r.app, oomAdjReason);
                 }
             }
             r.executeFg = false;
@@ -6015,7 +6033,7 @@
                         bringDownServiceLocked(sr, true);
                     }
                     /* Will be a no-op if nothing pending */
-                    mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_START_SERVICE);
+                    mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_START_SERVICE);
                 }
             } catch (RemoteException e) {
                 Slog.w(TAG, "Exception in new application when starting service "
@@ -6075,7 +6093,7 @@
             }
         }
         if (needOomAdj) {
-            mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+            mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_PROCESS_END);
         }
     }
 
@@ -6146,7 +6164,7 @@
                 bringDownServiceLocked(mTmpCollectionResults.get(i), true);
             }
             if (size > 0) {
-                mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+                mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_COMPONENT_DISABLED);
             }
             if (fullStop && !mTmpCollectionResults.isEmpty()) {
                 // if we're tearing down the app's entire service state, account for possible
@@ -6273,7 +6291,7 @@
             }
         }
         if (needOomAdj) {
-            mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+            mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_REMOVE_TASK);
         }
     }
 
@@ -6444,7 +6462,7 @@
             }
         }
 
-        mAm.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE);
+        mAm.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_STOP_SERVICE);
 
         if (!allowRestart) {
             psr.stopAllServices();
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 9752ade..4a6c9b2 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -44,6 +44,14 @@
 import static android.app.ActivityManagerInternal.ALLOW_NON_FULL;
 import static android.app.ActivityManagerInternal.MEDIA_PROJECTION_TOKEN_EVENT_CREATED;
 import static android.app.ActivityManagerInternal.MEDIA_PROJECTION_TOKEN_EVENT_DESTROYED;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_ACTIVITY;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_BACKUP;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_FINISH_RECEIVER;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_PROCESS_BEGIN;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_PROCESS_END;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_SHELL;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_SYSTEM_INIT;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_UI_VISIBILITY;
 import static android.app.AppOpsManager.MODE_ALLOWED;
 import static android.app.AppOpsManager.OP_NONE;
 import static android.content.pm.ApplicationInfo.HIDDEN_API_ENFORCEMENT_DEFAULT;
@@ -199,6 +207,7 @@
 import android.app.ActivityManagerInternal.BroadcastEventListener;
 import android.app.ActivityManagerInternal.ForegroundServiceStateListener;
 import android.app.ActivityManagerInternal.MediaProjectionTokenEvent;
+import android.app.ActivityManagerInternal.OomAdjReason;
 import android.app.ActivityTaskManager.RootTaskInfo;
 import android.app.ActivityThread;
 import android.app.AnrController;
@@ -368,7 +377,6 @@
 import android.util.IndentingPrintWriter;
 import android.util.IntArray;
 import android.util.Log;
-import android.util.LogWriter;
 import android.util.Pair;
 import android.util.PrintWriterPrinter;
 import android.util.Slog;
@@ -1968,7 +1976,7 @@
                 app.mProfile.addHostingComponentType(HOSTING_COMPONENT_TYPE_SYSTEM);
                 addPidLocked(app);
                 updateLruProcessLocked(app, false, null);
-                updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+                updateOomAdjLocked(OOM_ADJ_REASON_SYSTEM_INIT);
             }
         } catch (PackageManager.NameNotFoundException e) {
             throw new RuntimeException(
@@ -2502,7 +2510,7 @@
         // bind background threads to little cores
         // this is expected to fail inside of framework tests because apps can't touch cpusets directly
         // make sure we've already adjusted system_server's internal view of itself first
-        updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+        updateOomAdjLocked(OOM_ADJ_REASON_SYSTEM_INIT);
         try {
             Process.setThreadGroupAndCpuset(BackgroundThread.get().getThreadId(),
                     Process.THREAD_GROUP_SYSTEM);
@@ -3387,7 +3395,7 @@
             handleAppDiedLocked(app, pid, false, true, fromBinderDied);
 
             if (doOomAdj) {
-                updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_PROCESS_END);
+                updateOomAdjLocked(OOM_ADJ_REASON_PROCESS_END);
             }
             if (doLowMem) {
                 mAppProfiler.doLowMemReportIfNeededLocked(app);
@@ -4843,7 +4851,7 @@
             }
 
             if (!didSomething) {
-                updateOomAdjLocked(app, OomAdjuster.OOM_ADJ_REASON_PROCESS_BEGIN);
+                updateOomAdjLocked(app, OOM_ADJ_REASON_PROCESS_BEGIN);
                 checkTime(startTime, "finishAttachApplicationInner: after updateOomAdjLocked");
             }
 
@@ -5485,7 +5493,7 @@
                 "setProcessLimit()");
         synchronized (this) {
             mConstants.setOverrideMaxCachedProcesses(max);
-            trimApplicationsLocked(true, OomAdjuster.OOM_ADJ_REASON_PROCESS_END);
+            trimApplicationsLocked(true, OOM_ADJ_REASON_PROCESS_END);
         }
     }
 
@@ -5513,7 +5521,7 @@
                 pr.mState.setForcingToImportant(null);
                 clearProcessForegroundLocked(pr);
             }
-            updateOomAdjLocked(pr, OomAdjuster.OOM_ADJ_REASON_UI_VISIBILITY);
+            updateOomAdjLocked(pr, OOM_ADJ_REASON_UI_VISIBILITY);
         }
     }
 
@@ -5560,7 +5568,7 @@
             }
 
             if (changed) {
-                updateOomAdjLocked(pr, OomAdjuster.OOM_ADJ_REASON_UI_VISIBILITY);
+                updateOomAdjLocked(pr, OOM_ADJ_REASON_UI_VISIBILITY);
             }
         }
     }
@@ -6869,7 +6877,7 @@
                     new HostingRecord(HostingRecord.HOSTING_TYPE_ADDED_APPLICATION,
                             customProcess != null ? customProcess : info.processName));
             updateLruProcessLocked(app, false, null);
-            updateOomAdjLocked(app, OomAdjuster.OOM_ADJ_REASON_PROCESS_BEGIN);
+            updateOomAdjLocked(app, OOM_ADJ_REASON_PROCESS_BEGIN);
         }
 
         // Report usage as process is persistent and being started.
@@ -6986,7 +6994,7 @@
                 mOomAdjProfiler.onWakefulnessChanged(wakefulness);
                 mOomAdjuster.onWakefulnessChanged(wakefulness);
 
-                updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_UI_VISIBILITY);
+                updateOomAdjLocked(OOM_ADJ_REASON_UI_VISIBILITY);
             }
         }
     }
@@ -7748,7 +7756,7 @@
                     }
                 }
                 if (changed) {
-                    updateOomAdjLocked(pr, OomAdjuster.OOM_ADJ_REASON_UI_VISIBILITY);
+                    updateOomAdjLocked(pr, OOM_ADJ_REASON_UI_VISIBILITY);
                 }
             }
         } finally {
@@ -9508,7 +9516,7 @@
 
             mAppProfiler.setMemFactorOverrideLocked(level);
             // Kick off an oom adj update since we forced a mem factor update.
-            updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+            updateOomAdjLocked(OOM_ADJ_REASON_SHELL);
         }
     }
 
@@ -13408,7 +13416,7 @@
             proc.mProfile.addHostingComponentType(HOSTING_COMPONENT_TYPE_BACKUP);
 
             // Try not to kill the process during backup
-            updateOomAdjLocked(proc, OomAdjuster.OOM_ADJ_REASON_NONE);
+            updateOomAdjLocked(proc, OOM_ADJ_REASON_BACKUP);
 
             // If the process is already attached, schedule the creation of the backup agent now.
             // If it is not yet live, this will be done when it attaches to the framework.
@@ -13532,7 +13540,7 @@
 
                 // Not backing this app up any more; reset its OOM adjustment
                 final ProcessRecord proc = backupTarget.app;
-                updateOomAdjLocked(proc, OomAdjuster.OOM_ADJ_REASON_NONE);
+                updateOomAdjLocked(proc, OOM_ADJ_REASON_BACKUP);
                 proc.setInFullBackup(false);
                 proc.mProfile.clearHostingComponentType(HOSTING_COMPONENT_TYPE_BACKUP);
 
@@ -13923,7 +13931,7 @@
                 // If we actually concluded any broadcasts, we might now be able
                 // to trim the recipients' apps from our working set
                 if (doTrim) {
-                    trimApplicationsLocked(false, OomAdjuster.OOM_ADJ_REASON_FINISH_RECEIVER);
+                    trimApplicationsLocked(false, OOM_ADJ_REASON_FINISH_RECEIVER);
                     return;
                 }
             }
@@ -15185,7 +15193,7 @@
                 queue.finishReceiverLocked(callerApp, resultCode,
                         resultData, resultExtras, resultAbort, true);
                 // updateOomAdjLocked() will be done here
-                trimApplicationsLocked(false, OomAdjuster.OOM_ADJ_REASON_FINISH_RECEIVER);
+                trimApplicationsLocked(false, OOM_ADJ_REASON_FINISH_RECEIVER);
             }
 
         } finally {
@@ -16130,7 +16138,7 @@
             item.foregroundServiceTypes = fgServiceTypes;
         }
         if (oomAdj) {
-            updateOomAdjLocked(proc, OomAdjuster.OOM_ADJ_REASON_UI_VISIBILITY);
+            updateOomAdjLocked(proc, OOM_ADJ_REASON_UI_VISIBILITY);
         }
     }
 
@@ -16196,7 +16204,7 @@
      * {@link #enqueueOomAdjTargetLocked}.
      */
     @GuardedBy("this")
-    void updateOomAdjPendingTargetsLocked(@OomAdjuster.OomAdjReason int oomAdjReason) {
+    void updateOomAdjPendingTargetsLocked(@OomAdjReason int oomAdjReason) {
         mOomAdjuster.updateOomAdjPendingTargetsLocked(oomAdjReason);
     }
 
@@ -16215,7 +16223,7 @@
     }
 
     @GuardedBy("this")
-    final void updateOomAdjLocked(@OomAdjuster.OomAdjReason int oomAdjReason) {
+    final void updateOomAdjLocked(@OomAdjReason int oomAdjReason) {
         mOomAdjuster.updateOomAdjLocked(oomAdjReason);
     }
 
@@ -16227,8 +16235,7 @@
      * @return whether updateOomAdjLocked(app) was successful.
      */
     @GuardedBy("this")
-    final boolean updateOomAdjLocked(
-            ProcessRecord app, @OomAdjuster.OomAdjReason int oomAdjReason) {
+    final boolean updateOomAdjLocked(ProcessRecord app, @OomAdjReason int oomAdjReason) {
         return mOomAdjuster.updateOomAdjLocked(app, oomAdjReason);
     }
 
@@ -16461,16 +16468,14 @@
         mOomAdjuster.setUidTempAllowlistStateLSP(uid, onAllowlist);
     }
 
-    private void trimApplications(
-            boolean forceFullOomAdj, @OomAdjuster.OomAdjReason int oomAdjReason) {
+    private void trimApplications(boolean forceFullOomAdj, @OomAdjReason int oomAdjReason) {
         synchronized (this) {
             trimApplicationsLocked(forceFullOomAdj, oomAdjReason);
         }
     }
 
     @GuardedBy("this")
-    private void trimApplicationsLocked(
-            boolean forceFullOomAdj, @OomAdjuster.OomAdjReason int oomAdjReason) {
+    private void trimApplicationsLocked(boolean forceFullOomAdj, @OomAdjReason int oomAdjReason) {
         // First remove any unused application processes whose package
         // has been removed.
         boolean didSomething = false;
@@ -17442,7 +17447,7 @@
                 }
                 pr.mState.setHasOverlayUi(hasOverlayUi);
                 //Slog.i(TAG, "Setting hasOverlayUi=" + pr.hasOverlayUi + " for pid=" + pid);
-                updateOomAdjLocked(pr, OomAdjuster.OOM_ADJ_REASON_UI_VISIBILITY);
+                updateOomAdjLocked(pr, OOM_ADJ_REASON_UI_VISIBILITY);
             }
         }
 
@@ -17577,7 +17582,7 @@
 
         @Override
         public void trimApplications() {
-            ActivityManagerService.this.trimApplications(true, OomAdjuster.OOM_ADJ_REASON_ACTIVITY);
+            ActivityManagerService.this.trimApplications(true, OOM_ADJ_REASON_ACTIVITY);
         }
 
         public void killProcessesForRemovedTask(ArrayList<Object> procsToKill) {
@@ -17626,9 +17631,9 @@
         }
 
         @Override
-        public void updateOomAdj() {
+        public void updateOomAdj(@OomAdjReason int oomAdjReason) {
             synchronized (ActivityManagerService.this) {
-                ActivityManagerService.this.updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+                ActivityManagerService.this.updateOomAdjLocked(oomAdjReason);
             }
         }
 
@@ -18288,8 +18293,7 @@
             // sends to the activity. After this race issue between WM/ATMS and AMS is solved, this
             // workaround can be removed. (b/213288355)
             if (isNewPending) {
-                mOomAdjuster.mCachedAppOptimizer.unfreezeProcess(pid,
-                        OomAdjuster.OOM_ADJ_REASON_ACTIVITY);
+                mOomAdjuster.mCachedAppOptimizer.unfreezeProcess(pid, OOM_ADJ_REASON_ACTIVITY);
             }
             // We need to update the network rules for the app coming to the top state so that
             // it can access network when the device or the app is in a restricted state
diff --git a/services/core/java/com/android/server/am/BroadcastQueueImpl.java b/services/core/java/com/android/server/am/BroadcastQueueImpl.java
index bd36c3f..5a4d315 100644
--- a/services/core/java/com/android/server/am/BroadcastQueueImpl.java
+++ b/services/core/java/com/android/server/am/BroadcastQueueImpl.java
@@ -17,6 +17,7 @@
 package com.android.server.am;
 
 import static android.app.ActivityManager.RESTRICTION_LEVEL_RESTRICTED_BUCKET;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_START_RECEIVER;
 import static android.os.Process.ZYGOTE_POLICY_FLAG_EMPTY;
 import static android.os.Process.ZYGOTE_POLICY_FLAG_LATENCY_SENSITIVE;
 import static android.text.TextUtils.formatSimple;
@@ -37,7 +38,6 @@
 import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_MU;
 import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_BROADCAST;
 import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_MU;
-import static com.android.server.am.OomAdjuster.OOM_ADJ_REASON_START_RECEIVER;
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
diff --git a/services/core/java/com/android/server/am/BroadcastQueueModernImpl.java b/services/core/java/com/android/server/am/BroadcastQueueModernImpl.java
index a4bdf61..c2bd84f 100644
--- a/services/core/java/com/android/server/am/BroadcastQueueModernImpl.java
+++ b/services/core/java/com/android/server/am/BroadcastQueueModernImpl.java
@@ -16,6 +16,7 @@
 
 package com.android.server.am;
 
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_START_RECEIVER;
 import static android.os.Process.ZYGOTE_POLICY_FLAG_EMPTY;
 import static android.os.Process.ZYGOTE_POLICY_FLAG_LATENCY_SENSITIVE;
 
@@ -38,7 +39,6 @@
 import static com.android.server.am.BroadcastRecord.getReceiverProcessName;
 import static com.android.server.am.BroadcastRecord.getReceiverUid;
 import static com.android.server.am.BroadcastRecord.isDeliveryStateTerminal;
-import static com.android.server.am.OomAdjuster.OOM_ADJ_REASON_START_RECEIVER;
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
diff --git a/services/core/java/com/android/server/am/CachedAppOptimizer.java b/services/core/java/com/android/server/am/CachedAppOptimizer.java
index 4328efe..f42087f 100644
--- a/services/core/java/com/android/server/am/CachedAppOptimizer.java
+++ b/services/core/java/com/android/server/am/CachedAppOptimizer.java
@@ -18,6 +18,28 @@
 
 import static android.app.ActivityManager.UidFrozenStateChangedCallback.UID_FROZEN_STATE_FROZEN;
 import static android.app.ActivityManager.UidFrozenStateChangedCallback.UID_FROZEN_STATE_UNFROZEN;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_ACTIVITY;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_ALLOWLIST;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_BACKUP;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_BIND_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_COMPONENT_DISABLED;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_EXECUTING_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_FINISH_RECEIVER;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_GET_PROVIDER;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_PROCESS_BEGIN;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_PROCESS_END;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_REMOVE_PROVIDER;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_REMOVE_TASK;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_RESTRICTION_CHANGE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_SHELL;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_SHORT_FGS_TIMEOUT;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_START_RECEIVER;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_START_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_STOP_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_SYSTEM_INIT;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_UID_IDLE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_UI_VISIBILITY;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_UNBIND_SERVICE;
 import static android.content.ComponentCallbacks2.TRIM_MEMORY_BACKGROUND;
 
 import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_COMPACTION;
@@ -26,6 +48,7 @@
 
 import android.annotation.IntDef;
 import android.app.ActivityManager;
+import android.app.ActivityManagerInternal.OomAdjReason;
 import android.app.ActivityThread;
 import android.app.ApplicationExitInfo;
 import android.app.IApplicationThread;
@@ -139,6 +162,26 @@
             FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_BINDER_TXNS;
     static final int UNFREEZE_REASON_FEATURE_FLAGS =
             FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_FEATURE_FLAGS;
+    static final int UNFREEZE_REASON_SHORT_FGS_TIMEOUT =
+            FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_SHORT_FGS_TIMEOUT;
+    static final int UNFREEZE_REASON_SYSTEM_INIT =
+            FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_SYSTEM_INIT;
+    static final int UNFREEZE_REASON_BACKUP =
+            FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_BACKUP;
+    static final int UNFREEZE_REASON_SHELL =
+            FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_SHELL;
+    static final int UNFREEZE_REASON_REMOVE_TASK =
+            FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_REMOVE_TASK;
+    static final int UNFREEZE_REASON_UID_IDLE =
+            FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_UID_IDLE;
+    static final int UNFREEZE_REASON_STOP_SERVICE =
+            FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_STOP_SERVICE;
+    static final int UNFREEZE_REASON_EXECUTING_SERVICE =
+            FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_EXECUTING_SERVICE;
+    static final int UNFREEZE_REASON_RESTRICTION_CHANGE =
+            FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_RESTRICTION_CHANGE;
+    static final int UNFREEZE_REASON_COMPONENT_DISABLED =
+            FrameworkStatsLog.APP_FREEZE_CHANGED__UNFREEZE_REASON_V2__UFR_COMPONENT_DISABLED;
 
     @IntDef(prefix = {"UNFREEZE_REASON_"}, value = {
         UNFREEZE_REASON_NONE,
@@ -160,6 +203,16 @@
         UNFREEZE_REASON_FILE_LOCK_CHECK_FAILURE,
         UNFREEZE_REASON_BINDER_TXNS,
         UNFREEZE_REASON_FEATURE_FLAGS,
+        UNFREEZE_REASON_SHORT_FGS_TIMEOUT,
+        UNFREEZE_REASON_SYSTEM_INIT,
+        UNFREEZE_REASON_BACKUP,
+        UNFREEZE_REASON_SHELL,
+        UNFREEZE_REASON_REMOVE_TASK,
+        UNFREEZE_REASON_UID_IDLE,
+        UNFREEZE_REASON_STOP_SERVICE,
+        UNFREEZE_REASON_EXECUTING_SERVICE,
+        UNFREEZE_REASON_RESTRICTION_CHANGE,
+        UNFREEZE_REASON_COMPONENT_DISABLED,
     })
     @Retention(RetentionPolicy.SOURCE)
     public @interface UnfreezeReason {}
@@ -1365,7 +1418,7 @@
      * The caller of this function should still trigger updateOomAdj for AMS to unfreeze the app.
      * @param pid pid of the process to be unfrozen
      */
-    void unfreezeProcess(int pid, @OomAdjuster.OomAdjReason int reason) {
+    void unfreezeProcess(int pid, @OomAdjReason int reason) {
         synchronized (mFreezerLock) {
             ProcessRecord app = mFrozenProcesses.get(pid);
             if (app == null) {
@@ -1546,12 +1599,12 @@
         public long mOrigAnonRss;
         public int mProcState;
         public int mOomAdj;
-        public @OomAdjuster.OomAdjReason int mOomAdjReason;
+        public @OomAdjReason int mOomAdjReason;
 
         SingleCompactionStats(long[] rss, CompactSource source, String processName,
                 long deltaAnonRss, long zramConsumed, long anonMemFreed, long origAnonRss,
                 long cpuTimeMillis, int procState, int oomAdj,
-                @OomAdjuster.OomAdjReason int oomAdjReason, int uid) {
+                @OomAdjReason int oomAdjReason, int uid) {
             mRssAfterCompaction = rss;
             mSourceType = source;
             mProcessName = processName;
@@ -2207,32 +2260,52 @@
         }
     }
 
-    static int getUnfreezeReasonCodeFromOomAdjReason(@OomAdjuster.OomAdjReason int oomAdjReason) {
+    static int getUnfreezeReasonCodeFromOomAdjReason(@OomAdjReason int oomAdjReason) {
         switch (oomAdjReason) {
-            case OomAdjuster.OOM_ADJ_REASON_ACTIVITY:
+            case OOM_ADJ_REASON_ACTIVITY:
                 return UNFREEZE_REASON_ACTIVITY;
-            case OomAdjuster.OOM_ADJ_REASON_FINISH_RECEIVER:
+            case OOM_ADJ_REASON_FINISH_RECEIVER:
                 return UNFREEZE_REASON_FINISH_RECEIVER;
-            case OomAdjuster.OOM_ADJ_REASON_START_RECEIVER:
+            case OOM_ADJ_REASON_START_RECEIVER:
                 return UNFREEZE_REASON_START_RECEIVER;
-            case OomAdjuster.OOM_ADJ_REASON_BIND_SERVICE:
+            case OOM_ADJ_REASON_BIND_SERVICE:
                 return UNFREEZE_REASON_BIND_SERVICE;
-            case OomAdjuster.OOM_ADJ_REASON_UNBIND_SERVICE:
+            case OOM_ADJ_REASON_UNBIND_SERVICE:
                 return UNFREEZE_REASON_UNBIND_SERVICE;
-            case OomAdjuster.OOM_ADJ_REASON_START_SERVICE:
+            case OOM_ADJ_REASON_START_SERVICE:
                 return UNFREEZE_REASON_START_SERVICE;
-            case OomAdjuster.OOM_ADJ_REASON_GET_PROVIDER:
+            case OOM_ADJ_REASON_GET_PROVIDER:
                 return UNFREEZE_REASON_GET_PROVIDER;
-            case OomAdjuster.OOM_ADJ_REASON_REMOVE_PROVIDER:
+            case OOM_ADJ_REASON_REMOVE_PROVIDER:
                 return UNFREEZE_REASON_REMOVE_PROVIDER;
-            case OomAdjuster.OOM_ADJ_REASON_UI_VISIBILITY:
+            case OOM_ADJ_REASON_UI_VISIBILITY:
                 return UNFREEZE_REASON_UI_VISIBILITY;
-            case OomAdjuster.OOM_ADJ_REASON_ALLOWLIST:
+            case OOM_ADJ_REASON_ALLOWLIST:
                 return UNFREEZE_REASON_ALLOWLIST;
-            case OomAdjuster.OOM_ADJ_REASON_PROCESS_BEGIN:
+            case OOM_ADJ_REASON_PROCESS_BEGIN:
                 return UNFREEZE_REASON_PROCESS_BEGIN;
-            case OomAdjuster.OOM_ADJ_REASON_PROCESS_END:
+            case OOM_ADJ_REASON_PROCESS_END:
                 return UNFREEZE_REASON_PROCESS_END;
+            case OOM_ADJ_REASON_SHORT_FGS_TIMEOUT:
+                return UNFREEZE_REASON_SHORT_FGS_TIMEOUT;
+            case OOM_ADJ_REASON_SYSTEM_INIT:
+                return UNFREEZE_REASON_SYSTEM_INIT;
+            case OOM_ADJ_REASON_BACKUP:
+                return UNFREEZE_REASON_BACKUP;
+            case OOM_ADJ_REASON_SHELL:
+                return UNFREEZE_REASON_SHELL;
+            case OOM_ADJ_REASON_REMOVE_TASK:
+                return UNFREEZE_REASON_REMOVE_TASK;
+            case OOM_ADJ_REASON_UID_IDLE:
+                return UNFREEZE_REASON_UID_IDLE;
+            case OOM_ADJ_REASON_STOP_SERVICE:
+                return UNFREEZE_REASON_STOP_SERVICE;
+            case OOM_ADJ_REASON_EXECUTING_SERVICE:
+                return UNFREEZE_REASON_EXECUTING_SERVICE;
+            case OOM_ADJ_REASON_RESTRICTION_CHANGE:
+                return UNFREEZE_REASON_RESTRICTION_CHANGE;
+            case OOM_ADJ_REASON_COMPONENT_DISABLED:
+                return UNFREEZE_REASON_COMPONENT_DISABLED;
             default:
                 return UNFREEZE_REASON_NONE;
         }
diff --git a/services/core/java/com/android/server/am/ContentProviderHelper.java b/services/core/java/com/android/server/am/ContentProviderHelper.java
index a1fcd42..d8cb094 100644
--- a/services/core/java/com/android/server/am/ContentProviderHelper.java
+++ b/services/core/java/com/android/server/am/ContentProviderHelper.java
@@ -16,6 +16,8 @@
 package com.android.server.am;
 
 import static android.Manifest.permission.GET_ANY_PROVIDER_TYPE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_GET_PROVIDER;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_REMOVE_PROVIDER;
 import static android.content.ContentProvider.isAuthorityRedirectedForCloneProfile;
 import static android.os.Process.PROC_CHAR;
 import static android.os.Process.PROC_OUT_LONG;
@@ -292,7 +294,7 @@
                     checkTime(startTime, "getContentProviderImpl: before updateOomAdj");
                     final int verifiedAdj = cpr.proc.mState.getVerifiedAdj();
                     boolean success = mService.updateOomAdjLocked(cpr.proc,
-                            OomAdjuster.OOM_ADJ_REASON_GET_PROVIDER);
+                            OOM_ADJ_REASON_GET_PROVIDER);
                     // XXX things have changed so updateOomAdjLocked doesn't actually tell us
                     // if the process has been successfully adjusted.  So to reduce races with
                     // it, we will check whether the process still exists.  Note that this doesn't
@@ -757,7 +759,7 @@
 
             // update the app's oom adj value and each provider's usage stats
             if (providersPublished) {
-                mService.updateOomAdjLocked(r, OomAdjuster.OOM_ADJ_REASON_GET_PROVIDER);
+                mService.updateOomAdjLocked(r, OOM_ADJ_REASON_GET_PROVIDER);
                 for (int i = 0, size = providers.size(); i < size; i++) {
                     ContentProviderHolder src = providers.get(i);
                     if (src == null || src.info == null || src.provider == null) {
@@ -835,8 +837,7 @@
             ContentProviderRecord localCpr = mProviderMap.getProviderByClass(comp, userId);
             if (localCpr.hasExternalProcessHandles()) {
                 if (localCpr.removeExternalProcessHandleLocked(token)) {
-                    mService.updateOomAdjLocked(localCpr.proc,
-                            OomAdjuster.OOM_ADJ_REASON_REMOVE_PROVIDER);
+                    mService.updateOomAdjLocked(localCpr.proc, OOM_ADJ_REASON_REMOVE_PROVIDER);
                 } else {
                     Slog.e(TAG, "Attempt to remove content provider " + localCpr
                             + " with no external reference for token: " + token + ".");
@@ -1506,8 +1507,7 @@
             mService.stopAssociationLocked(conn.client.uid, conn.client.processName, cpr.uid,
                     cpr.appInfo.longVersionCode, cpr.name, cpr.info.processName);
             if (updateOomAdj) {
-                mService.updateOomAdjLocked(conn.provider.proc,
-                        OomAdjuster.OOM_ADJ_REASON_REMOVE_PROVIDER);
+                mService.updateOomAdjLocked(conn.provider.proc, OOM_ADJ_REASON_REMOVE_PROVIDER);
             }
         }
     }
diff --git a/services/core/java/com/android/server/am/OomAdjuster.java b/services/core/java/com/android/server/am/OomAdjuster.java
index a98571b..365dcd9 100644
--- a/services/core/java/com/android/server/am/OomAdjuster.java
+++ b/services/core/java/com/android/server/am/OomAdjuster.java
@@ -41,6 +41,29 @@
 import static android.app.ActivityManager.PROCESS_STATE_SERVICE;
 import static android.app.ActivityManager.PROCESS_STATE_TOP;
 import static android.app.ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_ACTIVITY;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_ALLOWLIST;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_BACKUP;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_BIND_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_COMPONENT_DISABLED;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_EXECUTING_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_FINISH_RECEIVER;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_GET_PROVIDER;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_NONE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_PROCESS_BEGIN;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_PROCESS_END;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_REMOVE_PROVIDER;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_REMOVE_TASK;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_RESTRICTION_CHANGE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_SHELL;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_SHORT_FGS_TIMEOUT;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_START_RECEIVER;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_START_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_STOP_SERVICE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_SYSTEM_INIT;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_UID_IDLE;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_UI_VISIBILITY;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_UNBIND_SERVICE;
 import static android.content.Context.BIND_TREAT_LIKE_VISIBLE_FOREGROUND_SERVICE;
 import static android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_CAMERA;
 import static android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION;
@@ -101,9 +124,9 @@
 import static com.android.server.am.ProcessList.VISIBLE_APP_ADJ;
 import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_SWITCH;
 
-import android.annotation.IntDef;
 import android.annotation.Nullable;
 import android.app.ActivityManager;
+import android.app.ActivityManagerInternal.OomAdjReason;
 import android.app.ActivityThread;
 import android.app.AppProtoEnums;
 import android.app.ApplicationExitInfo;
@@ -141,8 +164,6 @@
 import com.android.server.wm.WindowProcessController;
 
 import java.io.PrintWriter;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
 import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -154,32 +175,6 @@
 public class OomAdjuster {
     static final String TAG = "OomAdjuster";
 
-    static final int OOM_ADJ_REASON_NONE = 0;
-    static final int OOM_ADJ_REASON_ACTIVITY = 1;
-    static final int OOM_ADJ_REASON_FINISH_RECEIVER = 2;
-    static final int OOM_ADJ_REASON_START_RECEIVER = 3;
-    static final int OOM_ADJ_REASON_BIND_SERVICE = 4;
-    static final int OOM_ADJ_REASON_UNBIND_SERVICE = 5;
-    static final int OOM_ADJ_REASON_START_SERVICE = 6;
-    static final int OOM_ADJ_REASON_GET_PROVIDER = 7;
-    static final int OOM_ADJ_REASON_REMOVE_PROVIDER = 8;
-    static final int OOM_ADJ_REASON_UI_VISIBILITY = 9;
-    static final int OOM_ADJ_REASON_ALLOWLIST = 10;
-    static final int OOM_ADJ_REASON_PROCESS_BEGIN = 11;
-    static final int OOM_ADJ_REASON_PROCESS_END = 12;
-    static final int OOM_ADJ_REASON_SHORT_FGS_TIMEOUT = 13;
-
-    @IntDef(prefix = {"OOM_ADJ_REASON_"},
-            value = {OOM_ADJ_REASON_NONE, OOM_ADJ_REASON_ACTIVITY, OOM_ADJ_REASON_FINISH_RECEIVER,
-                    OOM_ADJ_REASON_START_RECEIVER, OOM_ADJ_REASON_BIND_SERVICE,
-                    OOM_ADJ_REASON_UNBIND_SERVICE, OOM_ADJ_REASON_START_SERVICE,
-                    OOM_ADJ_REASON_GET_PROVIDER, OOM_ADJ_REASON_REMOVE_PROVIDER,
-                    OOM_ADJ_REASON_UI_VISIBILITY, OOM_ADJ_REASON_ALLOWLIST,
-                    OOM_ADJ_REASON_PROCESS_BEGIN, OOM_ADJ_REASON_PROCESS_END,
-                    OOM_ADJ_REASON_SHORT_FGS_TIMEOUT})
-    @Retention(RetentionPolicy.SOURCE)
-    public @interface OomAdjReason {}
-
     public static final int oomAdjReasonToProto(@OomAdjReason int oomReason) {
         switch (oomReason) {
             case OOM_ADJ_REASON_NONE:
@@ -210,6 +205,24 @@
                 return AppProtoEnums.OOM_ADJ_REASON_PROCESS_END;
             case OOM_ADJ_REASON_SHORT_FGS_TIMEOUT:
                 return AppProtoEnums.OOM_ADJ_REASON_SHORT_FGS_TIMEOUT;
+            case OOM_ADJ_REASON_SYSTEM_INIT:
+                return AppProtoEnums.OOM_ADJ_REASON_SYSTEM_INIT;
+            case OOM_ADJ_REASON_BACKUP:
+                return AppProtoEnums.OOM_ADJ_REASON_BACKUP;
+            case OOM_ADJ_REASON_SHELL:
+                return AppProtoEnums.OOM_ADJ_REASON_SHELL;
+            case OOM_ADJ_REASON_REMOVE_TASK:
+                return AppProtoEnums.OOM_ADJ_REASON_REMOVE_TASK;
+            case OOM_ADJ_REASON_UID_IDLE:
+                return AppProtoEnums.OOM_ADJ_REASON_UID_IDLE;
+            case OOM_ADJ_REASON_STOP_SERVICE:
+                return AppProtoEnums.OOM_ADJ_REASON_STOP_SERVICE;
+            case OOM_ADJ_REASON_EXECUTING_SERVICE:
+                return AppProtoEnums.OOM_ADJ_REASON_EXECUTING_SERVICE;
+            case OOM_ADJ_REASON_RESTRICTION_CHANGE:
+                return AppProtoEnums.OOM_ADJ_REASON_RESTRICTION_CHANGE;
+            case OOM_ADJ_REASON_COMPONENT_DISABLED:
+                return AppProtoEnums.OOM_ADJ_REASON_COMPONENT_DISABLED;
             default:
                 return AppProtoEnums.OOM_ADJ_REASON_UNKNOWN_TO_PROTO;
         }
@@ -246,6 +259,24 @@
                 return OOM_ADJ_REASON_METHOD + "_processEnd";
             case OOM_ADJ_REASON_SHORT_FGS_TIMEOUT:
                 return OOM_ADJ_REASON_METHOD + "_shortFgs";
+            case OOM_ADJ_REASON_SYSTEM_INIT:
+                return OOM_ADJ_REASON_METHOD + "_systemInit";
+            case OOM_ADJ_REASON_BACKUP:
+                return OOM_ADJ_REASON_METHOD + "_backup";
+            case OOM_ADJ_REASON_SHELL:
+                return OOM_ADJ_REASON_METHOD + "_shell";
+            case OOM_ADJ_REASON_REMOVE_TASK:
+                return OOM_ADJ_REASON_METHOD + "_removeTask";
+            case OOM_ADJ_REASON_UID_IDLE:
+                return OOM_ADJ_REASON_METHOD + "_uidIdle";
+            case OOM_ADJ_REASON_STOP_SERVICE:
+                return OOM_ADJ_REASON_METHOD + "_stopService";
+            case OOM_ADJ_REASON_EXECUTING_SERVICE:
+                return OOM_ADJ_REASON_METHOD + "_executingService";
+            case OOM_ADJ_REASON_RESTRICTION_CHANGE:
+                return OOM_ADJ_REASON_METHOD + "_restrictionChange";
+            case OOM_ADJ_REASON_COMPONENT_DISABLED:
+                return OOM_ADJ_REASON_METHOD + "_componentDisabled";
             default:
                 return "_unknown";
         }
@@ -874,8 +905,7 @@
     }
 
     @GuardedBy("mService")
-    private void performUpdateOomAdjPendingTargetsLocked(
-            @OomAdjuster.OomAdjReason int oomAdjReason) {
+    private void performUpdateOomAdjPendingTargetsLocked(@OomAdjReason int oomAdjReason) {
         final ProcessRecord topApp = mService.getTopApp();
 
         Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, oomAdjReasonToString(oomAdjReason));
@@ -3453,7 +3483,7 @@
     }
 
     @GuardedBy("mService")
-    void unfreezeTemporarily(ProcessRecord app, @OomAdjuster.OomAdjReason int reason) {
+    void unfreezeTemporarily(ProcessRecord app, @OomAdjReason int reason) {
         if (!mCachedAppOptimizer.useFreezer()) {
             return;
         }
diff --git a/services/core/java/com/android/server/am/ProcessCachedOptimizerRecord.java b/services/core/java/com/android/server/am/ProcessCachedOptimizerRecord.java
index 24cc533..f233107 100644
--- a/services/core/java/com/android/server/am/ProcessCachedOptimizerRecord.java
+++ b/services/core/java/com/android/server/am/ProcessCachedOptimizerRecord.java
@@ -16,6 +16,8 @@
 
 package com.android.server.am;
 
+import android.app.ActivityManagerInternal.OomAdjReason;
+
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
 
@@ -51,7 +53,7 @@
     /**
      * Last oom adjust change reason for this app.
      */
-    @GuardedBy("mProcLock") private @OomAdjuster.OomAdjReason int mLastOomAdjChangeReason;
+    @GuardedBy("mProcLock") private @OomAdjReason int mLastOomAdjChangeReason;
 
     /**
      * The most recent compaction action performed for this app.
@@ -139,12 +141,12 @@
     }
 
     @GuardedBy("mProcLock")
-    void setLastOomAdjChangeReason(@OomAdjuster.OomAdjReason int reason) {
+    void setLastOomAdjChangeReason(@OomAdjReason int reason) {
         mLastOomAdjChangeReason = reason;
     }
 
     @GuardedBy("mProcLock")
-    @OomAdjuster.OomAdjReason
+    @OomAdjReason
     int getLastOomAdjChangeReason() {
         return mLastOomAdjChangeReason;
     }
diff --git a/services/core/java/com/android/server/am/ProcessList.java b/services/core/java/com/android/server/am/ProcessList.java
index b1322ef..a237a07 100644
--- a/services/core/java/com/android/server/am/ProcessList.java
+++ b/services/core/java/com/android/server/am/ProcessList.java
@@ -19,6 +19,8 @@
 import static android.app.ActivityManager.PROCESS_CAPABILITY_NONE;
 import static android.app.ActivityManager.PROCESS_STATE_CACHED_ACTIVITY;
 import static android.app.ActivityManager.PROCESS_STATE_NONEXISTENT;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_PROCESS_END;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_RESTRICTION_CHANGE;
 import static android.app.ActivityThread.PROC_START_SEQ_IDENT;
 import static android.content.pm.PackageManager.MATCH_DIRECT_BOOT_AUTO;
 import static android.net.NetworkPolicyManager.isProcStateAllowedWhileIdleOrPowerSaveMode;
@@ -2875,7 +2877,7 @@
                     reasonCode, subReason, reason, !doFreeze /* async */);
         }
         killAppZygotesLocked(packageName, appId, userId, false /* force */);
-        mService.updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_PROCESS_END);
+        mService.updateOomAdjLocked(OOM_ADJ_REASON_PROCESS_END);
         if (doFreeze) {
             freezePackageCgroup(packageUID, false);
         }
@@ -5140,7 +5142,7 @@
                 }
             });
             /* Will be a no-op if nothing pending */
-            mService.updateOomAdjPendingTargetsLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+            mService.updateOomAdjPendingTargetsLocked(OOM_ADJ_REASON_RESTRICTION_CHANGE);
         }
     }
 
diff --git a/services/core/java/com/android/server/am/ProcessRecord.java b/services/core/java/com/android/server/am/ProcessRecord.java
index afae623..7aae4d5 100644
--- a/services/core/java/com/android/server/am/ProcessRecord.java
+++ b/services/core/java/com/android/server/am/ProcessRecord.java
@@ -16,6 +16,8 @@
 
 package com.android.server.am;
 
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_ACTIVITY;
+
 import static com.android.internal.util.Preconditions.checkArgument;
 import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM;
 import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME;
@@ -1450,7 +1452,7 @@
             }
             mService.updateLruProcessLocked(this, activityChange, null /* client */);
             if (updateOomAdj) {
-                mService.updateOomAdjLocked(this, OomAdjuster.OOM_ADJ_REASON_ACTIVITY);
+                mService.updateOomAdjLocked(this, OOM_ADJ_REASON_ACTIVITY);
             }
         }
     }
diff --git a/services/core/java/com/android/server/am/ProcessStateRecord.java b/services/core/java/com/android/server/am/ProcessStateRecord.java
index 71d5d39..8eaf70e 100644
--- a/services/core/java/com/android/server/am/ProcessStateRecord.java
+++ b/services/core/java/com/android/server/am/ProcessStateRecord.java
@@ -18,6 +18,7 @@
 
 import static android.app.ActivityManager.PROCESS_CAPABILITY_NONE;
 import static android.app.ActivityManager.PROCESS_STATE_NONEXISTENT;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_UI_VISIBILITY;
 
 import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_OOM_ADJ;
 import static com.android.server.am.ProcessProfileRecord.HOSTING_COMPONENT_TYPE_ACTIVITY;
@@ -766,7 +767,7 @@
             Slog.i(TAG, "Setting runningRemoteAnimation=" + runningRemoteAnimation
                     + " for pid=" + mApp.getPid());
         }
-        mService.updateOomAdjLocked(mApp, OomAdjuster.OOM_ADJ_REASON_UI_VISIBILITY);
+        mService.updateOomAdjLocked(mApp, OOM_ADJ_REASON_UI_VISIBILITY);
     }
 
     @GuardedBy({"mService", "mProcLock"})
diff --git a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
index 12fe6a0..8123c07 100644
--- a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
+++ b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
@@ -831,7 +831,7 @@
     private final Runnable mUpdateOomAdjRunnable = new Runnable() {
         @Override
         public void run() {
-            mAmInternal.updateOomAdj();
+            mAmInternal.updateOomAdj(ActivityManagerInternal.OOM_ADJ_REASON_ACTIVITY);
         }
     };
 
diff --git a/services/tests/mockingservicestests/src/com/android/server/am/BroadcastQueueTest.java b/services/tests/mockingservicestests/src/com/android/server/am/BroadcastQueueTest.java
index b6bc02a..64a95ca 100644
--- a/services/tests/mockingservicestests/src/com/android/server/am/BroadcastQueueTest.java
+++ b/services/tests/mockingservicestests/src/com/android/server/am/BroadcastQueueTest.java
@@ -16,6 +16,8 @@
 
 package com.android.server.am;
 
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_FINISH_RECEIVER;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_START_RECEIVER;
 import static android.os.UserHandle.USER_SYSTEM;
 
 import static com.android.server.am.ActivityManagerDebugConfig.LOG_WRITER_INFO;
@@ -39,7 +41,6 @@
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.doReturn;
-import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.inOrder;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
@@ -961,7 +962,7 @@
             } else {
                 // Confirm that app was thawed
                 verify(mAms.mOomAdjuster, atLeastOnce()).unfreezeTemporarily(
-                        eq(receiverApp), eq(OomAdjuster.OOM_ADJ_REASON_START_RECEIVER));
+                        eq(receiverApp), eq(OOM_ADJ_REASON_START_RECEIVER));
 
                 // Confirm that we added package to process
                 verify(receiverApp, atLeastOnce()).addPackage(eq(receiverApp.info.packageName),
@@ -1404,7 +1405,7 @@
 
         // Finally, verify that we thawed the final receiver
         verify(mAms.mOomAdjuster).unfreezeTemporarily(eq(callerApp),
-                eq(OomAdjuster.OOM_ADJ_REASON_FINISH_RECEIVER));
+                eq(OOM_ADJ_REASON_FINISH_RECEIVER));
     }
 
     /**
diff --git a/services/tests/mockingservicestests/src/com/android/server/am/MockingOomAdjusterTests.java b/services/tests/mockingservicestests/src/com/android/server/am/MockingOomAdjusterTests.java
index 485ce33..cda5456 100644
--- a/services/tests/mockingservicestests/src/com/android/server/am/MockingOomAdjusterTests.java
+++ b/services/tests/mockingservicestests/src/com/android/server/am/MockingOomAdjusterTests.java
@@ -38,11 +38,12 @@
 import static android.app.ActivityManager.PROCESS_STATE_TOP;
 import static android.app.ActivityManager.PROCESS_STATE_TOP_SLEEPING;
 import static android.app.ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_ACTIVITY;
+import static android.app.ActivityManagerInternal.OOM_ADJ_REASON_NONE;
 import static android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_SHORT_SERVICE;
 
 import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
 
-import static com.android.server.am.OomAdjuster.OOM_ADJ_REASON_ACTIVITY;
 import static com.android.server.am.ProcessList.BACKUP_APP_ADJ;
 import static com.android.server.am.ProcessList.CACHED_APP_MAX_ADJ;
 import static com.android.server.am.ProcessList.CACHED_APP_MIN_ADJ;
@@ -254,12 +255,13 @@
      * - If there's only one process, then it calls updateOomAdjLocked(ProcessRecord, int).
      * - Otherwise, sets the processes to the LRU and run updateOomAdjLocked(int).
      */
+    @SuppressWarnings("GuardedBy")
     private void updateOomAdj(ProcessRecord... apps) {
         if (apps.length == 1) {
-            sService.mOomAdjuster.updateOomAdjLocked(apps[0], OomAdjuster.OOM_ADJ_REASON_NONE);
+            sService.mOomAdjuster.updateOomAdjLocked(apps[0], OOM_ADJ_REASON_NONE);
         } else {
             setProcessesToLru(apps);
-            sService.mOomAdjuster.updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+            sService.mOomAdjuster.updateOomAdjLocked(OOM_ADJ_REASON_NONE);
             sService.mProcessList.getLruProcessesLOSP().clear();
         }
     }
@@ -658,7 +660,7 @@
         ServiceRecord s = bindService(app, system,
                 null, Context.BIND_ALMOST_PERCEPTIBLE, mock(IBinder.class));
         sService.mWakefulness.set(PowerManagerInternal.WAKEFULNESS_AWAKE);
-        sService.mOomAdjuster.updateOomAdjLocked(app, OomAdjuster.OOM_ADJ_REASON_NONE);
+        sService.mOomAdjuster.updateOomAdjLocked(app, OOM_ADJ_REASON_NONE);
 
         assertProcStates(app, PROCESS_STATE_IMPORTANT_FOREGROUND,
                 PERCEPTIBLE_APP_ADJ + 1, SCHED_GROUP_DEFAULT);
@@ -1226,7 +1228,7 @@
                     mock(IBinder.class));
             client.mState.setMaxAdj(PERSISTENT_PROC_ADJ);
             sService.mWakefulness.set(PowerManagerInternal.WAKEFULNESS_AWAKE);
-            sService.mOomAdjuster.updateOomAdjLocked(app, OomAdjuster.OOM_ADJ_REASON_NONE);
+            sService.mOomAdjuster.updateOomAdjLocked(app, OOM_ADJ_REASON_NONE);
 
             assertEquals(PERCEPTIBLE_APP_ADJ + 1, app.mState.getSetAdj());
         }
@@ -1243,7 +1245,7 @@
                     mock(IBinder.class));
             client.mState.setMaxAdj(PERSISTENT_PROC_ADJ);
             sService.mWakefulness.set(PowerManagerInternal.WAKEFULNESS_AWAKE);
-            sService.mOomAdjuster.updateOomAdjLocked(app, OomAdjuster.OOM_ADJ_REASON_NONE);
+            sService.mOomAdjuster.updateOomAdjLocked(app, OOM_ADJ_REASON_NONE);
             doReturn(false).when(wpc).isHeavyWeightProcess();
 
             assertEquals(PERCEPTIBLE_APP_ADJ + 1, app.mState.getSetAdj());
@@ -1497,7 +1499,7 @@
 
         client2.mServices.setHasForegroundServices(false, 0, /* hasNoneType=*/false);
         sService.mWakefulness.set(PowerManagerInternal.WAKEFULNESS_AWAKE);
-        sService.mOomAdjuster.updateOomAdjLocked(client2, OomAdjuster.OOM_ADJ_REASON_NONE);
+        sService.mOomAdjuster.updateOomAdjLocked(client2, OOM_ADJ_REASON_NONE);
 
         assertEquals(PROCESS_STATE_CACHED_EMPTY, client2.mState.getSetProcState());
         assertEquals(PROCESS_STATE_CACHED_EMPTY, client.mState.getSetProcState());
@@ -1919,7 +1921,7 @@
         doReturn(client2).when(sService).getTopApp();
         sService.mWakefulness.set(PowerManagerInternal.WAKEFULNESS_AWAKE);
 
-        sService.mOomAdjuster.updateOomAdjLocked(app2, OomAdjuster.OOM_ADJ_REASON_NONE);
+        sService.mOomAdjuster.updateOomAdjLocked(app2, OOM_ADJ_REASON_NONE);
         assertProcStates(app2, PROCESS_STATE_BOUND_TOP, VISIBLE_APP_ADJ,
                 SCHED_GROUP_DEFAULT);
     }
@@ -2029,7 +2031,7 @@
             setServiceMap(s3, MOCKAPP5_UID, cn3);
             setServiceMap(c2s, MOCKAPP3_UID, cn4);
             app2UidRecord.setIdle(false);
-            sService.mOomAdjuster.updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+            sService.mOomAdjuster.updateOomAdjLocked(OOM_ADJ_REASON_NONE);
 
             assertProcStates(app1, PROCESS_STATE_FOREGROUND_SERVICE, PERCEPTIBLE_APP_ADJ,
                     SCHED_GROUP_DEFAULT);
@@ -2055,7 +2057,7 @@
                     anyInt(), anyBoolean(), anyBoolean(), anyBoolean());
             doNothing().when(sService.mServices)
                     .scheduleServiceTimeoutLocked(any(ProcessRecord.class));
-            sService.mOomAdjuster.updateOomAdjLocked(client1, OomAdjuster.OOM_ADJ_REASON_NONE);
+            sService.mOomAdjuster.updateOomAdjLocked(client1, OOM_ADJ_REASON_NONE);
 
             assertEquals(PROCESS_STATE_CACHED_EMPTY, client1.mState.getSetProcState());
             assertEquals(PROCESS_STATE_SERVICE, app1.mState.getSetProcState());
@@ -2427,7 +2429,7 @@
         app2.mState.setHasShownUi(false);
 
         sService.mWakefulness.set(PowerManagerInternal.WAKEFULNESS_AWAKE);
-        sService.mOomAdjuster.updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+        sService.mOomAdjuster.updateOomAdjLocked(OOM_ADJ_REASON_NONE);
 
         assertProcStates(app, true, PROCESS_STATE_SERVICE, cachedAdj1, "cch-started-ui-services");
         assertProcStates(app2, true, PROCESS_STATE_SERVICE, cachedAdj2, "cch-started-services");
@@ -2436,7 +2438,7 @@
         app.mState.setAdjType(null);
         app.mState.setSetAdj(UNKNOWN_ADJ);
         app.mState.setHasShownUi(false);
-        sService.mOomAdjuster.updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+        sService.mOomAdjuster.updateOomAdjLocked(OOM_ADJ_REASON_NONE);
 
         assertProcStates(app, false, PROCESS_STATE_SERVICE, SERVICE_ADJ, "started-services");
 
@@ -2445,7 +2447,7 @@
         app.mState.setAdjType(null);
         app.mState.setSetAdj(UNKNOWN_ADJ);
         s.lastActivity = now - sService.mConstants.MAX_SERVICE_INACTIVITY - 1;
-        sService.mOomAdjuster.updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+        sService.mOomAdjuster.updateOomAdjLocked(OOM_ADJ_REASON_NONE);
 
         assertProcStates(app, true, PROCESS_STATE_SERVICE, cachedAdj1, "cch-started-services");
 
@@ -2463,7 +2465,7 @@
         s.lastActivity = now;
 
         app.mServices.startService(s);
-        sService.mOomAdjuster.updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+        sService.mOomAdjuster.updateOomAdjLocked(OOM_ADJ_REASON_NONE);
 
         assertProcStates(app, false, PROCESS_STATE_SERVICE, SERVICE_ADJ, "started-services");
         assertProcStates(app2, true, PROCESS_STATE_SERVICE, cachedAdj1, "cch-started-services");
@@ -2474,7 +2476,7 @@
         app.mState.setSetAdj(UNKNOWN_ADJ);
         app.mState.setHasShownUi(false);
         s.lastActivity = now - sService.mConstants.MAX_SERVICE_INACTIVITY - 1;
-        sService.mOomAdjuster.updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+        sService.mOomAdjuster.updateOomAdjLocked(OOM_ADJ_REASON_NONE);
 
         assertProcStates(app, false, PROCESS_STATE_SERVICE, SERVICE_ADJ, "started-services");
         assertProcStates(app2, true, PROCESS_STATE_SERVICE, cachedAdj1, "cch-started-services");
@@ -2482,7 +2484,7 @@
         doReturn(userOther).when(sService.mUserController).getCurrentUserId();
         sService.mOomAdjuster.handleUserSwitchedLocked();
 
-        sService.mOomAdjuster.updateOomAdjLocked(OomAdjuster.OOM_ADJ_REASON_NONE);
+        sService.mOomAdjuster.updateOomAdjLocked(OOM_ADJ_REASON_NONE);
         assertProcStates(app, true, PROCESS_STATE_SERVICE, cachedAdj1, "cch-started-services");
         assertProcStates(app2, false, PROCESS_STATE_SERVICE, SERVICE_ADJ, "started-services");
     }