(DO NOT MERGE) Fix pub issue #58043: Copy crash in Android 4.3...

...when clipboard listener attached

We need to clear the calling identity before dispatching change
notifications.  Also make this more robust, so that in the face
of any failure we will clean up the broadcast state.

Integrated from master.

Change-Id: I05e1f76ffd486439535631fe4062dabe94bd2ccf
diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index bb9e19f..a25e311 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -16,6 +16,7 @@
 
 package android.app;
 
+import android.R;
 import com.android.internal.app.IUsageStats;
 import com.android.internal.os.PkgUsageStats;
 import com.android.internal.util.MemInfoReader;
@@ -369,9 +370,9 @@
         // Really brain dead right now -- just take this from the configured
         // vm heap size, and assume it is in megabytes and thus ends with "m".
         String vmHeapSize = SystemProperties.get("dalvik.vm.heapsize", "16m");
-        return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1));
+        return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length() - 1));
     }
-    
+
     /**
      * Used by persistent processes to determine if they are running on a
      * higher-end device so should be okay using hardware drawing acceleration
diff --git a/services/java/com/android/server/ClipboardService.java b/services/java/com/android/server/ClipboardService.java
index 058857d..0bf03b5 100644
--- a/services/java/com/android/server/ClipboardService.java
+++ b/services/java/com/android/server/ClipboardService.java
@@ -154,31 +154,36 @@
             if (clip != null && clip.getItemCount() <= 0) {
                 throw new IllegalArgumentException("No items");
             }
-            if (mAppOps.noteOp(AppOpsManager.OP_WRITE_CLIPBOARD, Binder.getCallingUid(),
+            final int callingUid = Binder.getCallingUid();
+            if (mAppOps.noteOp(AppOpsManager.OP_WRITE_CLIPBOARD, callingUid,
                     callingPackage) != AppOpsManager.MODE_ALLOWED) {
                 return;
             }
-            checkDataOwnerLocked(clip, Binder.getCallingUid());
+            checkDataOwnerLocked(clip, callingUid);
             clearActiveOwnersLocked();
             PerUserClipboard clipboard = getClipboard();
             clipboard.primaryClip = clip;
+            final long ident = Binder.clearCallingIdentity();
             final int n = clipboard.primaryClipListeners.beginBroadcast();
-            for (int i = 0; i < n; i++) {
-                try {
-                    ListenerInfo li = (ListenerInfo)
-                            clipboard.primaryClipListeners.getBroadcastCookie(i);
-                    if (mAppOps.checkOpNoThrow(AppOpsManager.OP_READ_CLIPBOARD, li.mUid,
-                            li.mPackageName) == AppOpsManager.MODE_ALLOWED) {
-                        clipboard.primaryClipListeners.getBroadcastItem(i)
-                                .dispatchPrimaryClipChanged();
+            try {
+                for (int i = 0; i < n; i++) {
+                    try {
+                        ListenerInfo li = (ListenerInfo)
+                                clipboard.primaryClipListeners.getBroadcastCookie(i);
+                        if (mAppOps.checkOpNoThrow(AppOpsManager.OP_READ_CLIPBOARD, li.mUid,
+                                li.mPackageName) == AppOpsManager.MODE_ALLOWED) {
+                            clipboard.primaryClipListeners.getBroadcastItem(i)
+                                    .dispatchPrimaryClipChanged();
+                        }
+                    } catch (RemoteException e) {
+                        // The RemoteCallbackList will take care of removing
+                        // the dead object for us.
                     }
-                } catch (RemoteException e) {
-
-                    // The RemoteCallbackList will take care of removing
-                    // the dead object for us.
                 }
+            } finally {
+                clipboard.primaryClipListeners.finishBroadcast();
+                Binder.restoreCallingIdentity(ident);
             }
-            clipboard.primaryClipListeners.finishBroadcast();
         }
     }