Track added/removed window when focus is null
Improves the blaming of ANRs by determining if an app added windows
after it was launched.
Bug: 38121026
Test: Log inspection
Change-Id: Id86c1981150cf546c92d786ad45d5c2dda5573e0
diff --git a/services/core/java/com/android/server/wm/Task.java b/services/core/java/com/android/server/wm/Task.java
index 818df01..bfebca8 100644
--- a/services/core/java/com/android/server/wm/Task.java
+++ b/services/core/java/com/android/server/wm/Task.java
@@ -163,6 +163,8 @@
@VisibleForTesting
boolean shouldDeferRemoval() {
+ // TODO: This should probably return false if mChildren.isEmpty() regardless if the stack
+ // is animating...
return hasWindowsAlive() && mStack.isAnimating();
}
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index 02fdfee..9d1b3d9 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -617,6 +617,11 @@
WindowState mCurrentFocus = null;
WindowState mLastFocus = null;
+ /** Windows added since {@link #mCurrentFocus} was set to null. Used for ANR blaming. */
+ private final ArrayList<WindowState> mWinAddedSinceNullFocus = new ArrayList<>();
+ /** Windows removed since {@link #mCurrentFocus} was set to null. Used for ANR blaming. */
+ private final ArrayList<WindowState> mWinRemovedSinceNullFocus = new ArrayList<>();
+
/** This just indicates the window the input method is on top of, not
* necessarily the window its input is going to. */
WindowState mInputMethodTarget = null;
@@ -1381,6 +1386,9 @@
// From now on, no exceptions or errors allowed!
res = WindowManagerGlobal.ADD_OKAY;
+ if (mCurrentFocus == null) {
+ mWinAddedSinceNullFocus.add(win);
+ }
if (excludeWindowTypeFromTapOutTask(type)) {
displayContent.mTapExcludedWindows.add(win);
@@ -1667,6 +1675,9 @@
mAppOps.finishOp(win.mAppOp, win.getOwningUid(), win.getOwningPackage());
}
+ if (mCurrentFocus == null) {
+ mWinRemovedSinceNullFocus.add(win);
+ }
mPendingRemove.remove(win);
mResizingWindows.remove(win);
mWindowsChanged = true;
@@ -5804,6 +5815,11 @@
mCurrentFocus = newFocus;
mLosingFocus.remove(newFocus);
+ if (mCurrentFocus != null) {
+ mWinAddedSinceNullFocus.clear();
+ mWinRemovedSinceNullFocus.clear();
+ }
+
int focusChanged = mPolicy.focusChangedLw(oldFocus, newFocus);
if (imWindowChanged && oldFocus != mInputMethodWindow) {
@@ -6538,6 +6554,12 @@
if (reason != null) {
pw.println(" Reason: " + reason);
}
+ if (!mWinAddedSinceNullFocus.isEmpty()) {
+ pw.println(" Windows added since null focus: " + mWinAddedSinceNullFocus);
+ }
+ if (!mWinRemovedSinceNullFocus.isEmpty()) {
+ pw.println(" Windows removed since null focus: " + mWinRemovedSinceNullFocus);
+ }
pw.println();
dumpWindowsNoHeaderLocked(pw, true, null);
pw.println();