Merge "Delay tryToRebind if application exit reason is LMK"

1 files changed, 58 insertions, 13 deletions

diff --git a/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java b/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java
index f9e2eae20c76..36b976562877 100644
--- a/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java
+++ b/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java
@@ -36,6 +36,7 @@ import android.annotation.NonNull;
 import android.app.ActivityManager;
 import android.app.AppGlobals;
 import android.app.AppOpsManager;
+import android.app.ApplicationExitInfo;
 import android.app.ILocalWallpaperColorConsumer;
 import android.app.IWallpaperManager;
 import android.app.IWallpaperManagerCallback;
@@ -189,6 +190,10 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
 
     private final Object mLock = new Object();
 
+    private static final double LMK_LOW_THRESHOLD_MEMORY_PERCENTAGE = 10;
+    private static final int LMK_RECONNECT_REBIND_RETRIES = 3;
+    private static final long LMK_RECONNECT_DELAY_MS = 5000;
+
     /**
      * Minimum time between crashes of a wallpaper service for us to consider
      * restarting it vs. just reverting to the static wallpaper.
@@ -1208,6 +1213,7 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
         /** Time in milliseconds until we expect the wallpaper to reconnect (unless we're in the
          *  middle of an update). If exceeded, the wallpaper gets reset to the system default. */
         private static final long WALLPAPER_RECONNECT_TIMEOUT_MS = 10000;
+        private int mLmkLimitRebindRetries = LMK_RECONNECT_REBIND_RETRIES;
 
         final WallpaperInfo mInfo;
         IWallpaperService mService;
@@ -1448,20 +1454,51 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
                             && mWallpaper.userId == mCurrentUserId
                             && !Objects.equals(mDefaultWallpaperComponent, wpService)
                             && !Objects.equals(mImageWallpaper, wpService)) {
-                        // There is a race condition which causes
-                        // {@link #mWallpaper.wallpaperUpdating} to be false even if it is
-                        // currently updating since the broadcast notifying us is async.
-                        // This race is overcome by the general rule that we only reset the
-                        // wallpaper if its service was shut down twice
-                        // during {@link #MIN_WALLPAPER_CRASH_TIME} millis.
-                        if (mWallpaper.lastDiedTime != 0
-                                && mWallpaper.lastDiedTime + MIN_WALLPAPER_CRASH_TIME
-                                > SystemClock.uptimeMillis()) {
-                            Slog.w(TAG, "Reverting to built-in wallpaper!");
-                            clearWallpaperLocked(true, FLAG_SYSTEM, mWallpaper.userId, null);
+                        List<ApplicationExitInfo> reasonList =
+                                mActivityManager.getHistoricalProcessExitReasons(
+                                wpService.getPackageName(), 0, 1);
+                        int exitReason = ApplicationExitInfo.REASON_UNKNOWN;
+                        if (reasonList != null && !reasonList.isEmpty()) {
+                            ApplicationExitInfo info = reasonList.get(0);
+                            exitReason = info.getReason();
+                        }
+                        Slog.d(TAG, "exitReason: " + exitReason);
+                        // If exit reason is LOW_MEMORY_KILLER
+                        // delay the mTryToRebindRunnable for 10s
+                        if (exitReason == ApplicationExitInfo.REASON_LOW_MEMORY) {
+                            if (isRunningOnLowMemory()) {
+                                Slog.i(TAG, "Rebind is delayed due to lmk");
+                                mContext.getMainThreadHandler().postDelayed(mTryToRebindRunnable,
+                                        LMK_RECONNECT_DELAY_MS);
+                                mLmkLimitRebindRetries = LMK_RECONNECT_REBIND_RETRIES;
+                            } else {
+                                if (mLmkLimitRebindRetries <= 0) {
+                                    Slog.w(TAG, "Reverting to built-in wallpaper due to lmk!");
+                                    clearWallpaperLocked(true, FLAG_SYSTEM, mWallpaper.userId,
+                                            null);
+                                    mLmkLimitRebindRetries = LMK_RECONNECT_REBIND_RETRIES;
+                                    return;
+                                }
+                                mLmkLimitRebindRetries--;
+                                mContext.getMainThreadHandler().postDelayed(mTryToRebindRunnable,
+                                        LMK_RECONNECT_DELAY_MS);
+                            }
                         } else {
-                            mWallpaper.lastDiedTime = SystemClock.uptimeMillis();
-                            tryToRebind();
+                            // There is a race condition which causes
+                            // {@link #mWallpaper.wallpaperUpdating} to be false even if it is
+                            // currently updating since the broadcast notifying us is async.
+                            // This race is overcome by the general rule that we only reset the
+                            // wallpaper if its service was shut down twice
+                            // during {@link #MIN_WALLPAPER_CRASH_TIME} millis.
+                            if (mWallpaper.lastDiedTime != 0
+                                    && mWallpaper.lastDiedTime + MIN_WALLPAPER_CRASH_TIME
+                                    > SystemClock.uptimeMillis()) {
+                                Slog.w(TAG, "Reverting to built-in wallpaper!");
+                                clearWallpaperLocked(true, FLAG_SYSTEM, mWallpaper.userId, null);
+                            } else {
+                                mWallpaper.lastDiedTime = SystemClock.uptimeMillis();
+                                tryToRebind();
+                            }
                         }
                     }
                 } else {
@@ -1472,6 +1509,14 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
             }
         };
 
+        private boolean isRunningOnLowMemory() {
+            ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo();
+            mActivityManager.getMemoryInfo(memoryInfo);
+            double availableMBsInPercentage = memoryInfo.availMem / (double)memoryInfo.totalMem *
+                    100.0;
+            return availableMBsInPercentage < LMK_LOW_THRESHOLD_MEMORY_PERCENTAGE;
+        }
+
         /**
          * Called by a live wallpaper if its colors have changed.
          * @param primaryColors representation of wallpaper primary colors