Symptom:
When switch between two home activities, the home process might not be updated to the correct one. In that case, the home activity might be killed easily.
Root Cause:
The home process is updated only when a home activity is newly created or being restarted. ActivityManager did not update the home process when simply resume a home activity.
Solution:
Update home process when home activity resumed
Reproduce Steps:
1. Install a launcher application, such as Apex Launcher
2. Press home key to change to Apex Launcher by "Just once" option
3. Press home key to switch back to original home activity by "Just once" option.
(The home process is still the Apex Launcher's process because ActivityManager does not update the home process when resuming the original home activity.)
Change-Id: I046279ca7ba851a283ee67ea19202890f7b3f343
Symptom:
The root activity not always located at index 0 of the task.
For example, the index 1 activity will become the new root
when the original root activity (at index 0) finished.
The new root activity might be finished unexpectedly before
the original root activity actually destroyed.
Solution:
Check frontOfTask to avoid finishing the root activity unexpectedly
Change-Id: I623ab97e9c95c83b3cfe7c9dfc151a291a391ea4
Symptom:
In certain situations, application starts activity while
it is in background. When an existing background activity
starts a new activity which results to be kept in the same
background task, the new activity won't be resumed.
In that case, the background task (sourceTask) should not be
moved to top in window manager.
Solution:
Move top task of the target stack to top in window manager
Change-Id: Id7a37ea67ce1f80e0c2b5399865c51fd7113deb8
Sympton:
When application crash in a special timing and system server's InputMethodManager is binding, deadlock may occur.
Root Cause:
Thread(1): When using InputMethodManager in system server, it will lock mH(handler) of InputMethodManager,
and sometimes it will call to InputMethodManagerService::showCurrentInputLocked and will call bindService at some condition,
then it will also lock ActivityManagerService.
Thread(2): When an application crashed, it will lock ActivityManager when showing crash dialog, inside the dialog,
it will call setEnabled of Button and lock mH of InputMethodManager.setEnable of TextView will lock IMM's handler.
So the deadlock happened as the flow: (2) lock AMS -> (1)lock mH -> (2)wait mH -> (1) wait AMS
Solution:
Reduce nested lock of error dialog: post message to let (2) lock mH after release AMS lock.
Change-Id: Id85c29406236db3b5fca9655fde1fcaf0afd1337
Root Cause:
When there is only home activity existed,
updating home apk will call forceStopPackageLocked to finish the activity.
Then activity history becomes empty, then home will be launched,
but its package is still target to close that results a loop.
Solution:
If home activity has been force-stopped, do not stop the same home activity again.
Change-Id: Icff12028d407873c2e6f50a06bcad231b908ccbd
Root Cause:
Use removeTask with flag ActivityManager.REMOVE_TASK_KILL_PROCESS will set waitingToKill = "remove task"
to the target process when its setSchedGroup is not BG_NONINTERACTIVE.
Later the target process may be killed when applying oom-adj due to setSchedGroup has changed to BG_NONINTERACTIVE.
If the process is needed to restart, the process record will be resued.
Then the restarted process may be killed again because its waitingToKill is not null.
Solution:
Clean waitingToKill when process is dead.
Change-Id: I5ffb5388127f4221da4c700d3f1c224f7ca6e7b2
Symptom: Unable to kill by Am again and will be skipped updating its oom adj.
Root Cause:
A restarted process will reuse original process record.
The flag killedByAm will keep previous state.
Solution:
Reset the flag killedByAm to false when the process is started.
Note: Found another similiar patch If95137d91939cc44882ad2813131bcde0edd0c1b
Change-Id: I59a86648ca8d0aed4c489d92751af120aae5ef90
If all activities of a given stack were finishing, no activity was
marked as front-of-task. This confused ActivityManager, so make sure
there's always exactly one activity marked as front-of-task.
Change-Id: I087cbe10280d4a60aa5ccfaefe24a223523fb3f2
Allows us to choose what ABI a process uses when
launching it with "adb shell am instrument", for eg.
adb shell am instrument --abi arm64-v8a component/runner
Note that we only perform very basic validation of the
ABI. In general, there is no guarantee that the app will
launch with the instruction set we choose, for eg. if it
has native libraries that are for a different ABI.
bug: 14453227
Change-Id: Ifb7e89b53675080dc87941091ee5ac360f218d7f
As per a comment on an earlier code review.
(cherry-picked from commit a9d64733421d6765eab5c2730fa912f068e26047)
Change-Id: I064cffc13c323b721f3a16c83e0e95ee348ef9f6
This change contains fixes to base from libcore change
I37de3e7d1a005a73821221e6156d10b95c595d7a
Bug: 13927110
Change-Id: I2d96e50307611c269dcf47886cd4d976854da8fc
This patch uses the NativeLibraryHelper class to
match native libraries in an .apk package with
those listed in 'ro.cpu.abilist' property.
The result is stored in packages.xml and the
ApplicationInfo class.
This information will be used by the ActivityManager
to decide which zygote to use to launch the given
app.
Change-Id: I3ec3d050996d8f4621f286ca331b9ad47ea26fa0
Symptom: ANR report on wrong activity.
Root Cause:
KK changed resume behavior that will not update focus when only resume,
if the activity blocked, it may report ANR on previous focus.
By original concept, it will try to correct the ANR target,
but the stack of waiting(waitingVisible=true) activity may
different with current top stack.
If it gets key dispatch timeout, mResumedActivity and mPausingActivity
of its stack will be null becuase it is not top stack.
Then it is unable to change ANR target to the real no response activity.
Solution:
Use focused stack to get the real culprit.
Reproduce steps:
1.Launch an Activity X from launcher, press home key.
2.Launch X from launcher again, X blocks(sleeps 15sec) in onResume, press back key in the beginning of blocking duration.
3.ANR dialog shows launcher is no response.
Change-Id: I99416ad91e349096f995990f2240a97616fbaf28
The Zygote class is now in com.android.internal.os. It is
responsible for the vast majority of work before and after
the call to fork(). It calls back into the Runtime via
the new dalvik.system.ZygoteHooks class to allow the Runtime
to perform pre fork cleanup and post fork initialization.
The native code in Zygote.cpp is a direct and straightforward
port of the existing code in art. Most differences are
superficial, for example :
- We use C style logging (ALOGE) instead of stream based
logging.
- We call env->FatalError() instead of using LOG(FATAL)
Change-Id: Ia101fb2af12d23894fe57e4134d2bc6d142e5059
This field is written and read exclusively by the system server,
and should therefore belong to the SystemServer class.
Change-Id: I2708a9a45c0c9cd1a6f563e8cc5844bd8c424bf7
* commit 'd511bc17d614b1291f1b85f84180c1db157d2790':
[ActivityManager] Fix a bug: unable to start activity after starting activities during screen off.
When ensureActivitiesVisibleLocked goes through foreground activity
stack and reaches non-fullscreen activity, it sets showHomeBehindStack
variable to true.
If there is a fullscreen activity behind, showHomeBehindStack remains
unchanged, which causes Home application to be displayed anyway.
In this case user will see a fullscreen activity and Home activity
simultaneously.
To fix the issue we set showHomeBehindStack to false when we reach
fullscreen activity in the activity stack.
This was made visible by the following commit:
446ef1de8d
Change-Id: I535c1283a4e26f5cf606375b837d4b7195324af0
Symptom: ANR occurs on previous activity.
Root Cause:
In KK, when a background activity starts another existed background activity (bring to front),
if current focused stack is not the same as the stack of target starting activity,
it will still resume the top of target stack, even the top activity on the target stack may not the same as target activity.
And it will result incorrect focus, press back key will send to previous stack's top then popup ANR on previous activity:
"Reason: Waiting because no window has focus but there is a focused application".
By original code comment, it looks 'bring to front' should not happen in this issue case.
// If the target task is not in the front, then we need
// to bring it to the front... except... well, with
// SINGLE_TASK_LAUNCH it's not entirely clear. We'd like
// to have the same behavior as if a new instance was
// being started, which means not bringing it to the front
// if the caller is not itself in the front.
If the caller and target are in the same stask, it will just deliver new intent without changing task order (the same behavior as JellyBean).
So the patch concept is just to avoid to use target stack to resume top when caller and target are in different stack.
Solution: Do not allow to resume another stack top if non-top activity try to bring existed activity to front.
It may not be a good solution, just a reminder for the issue case.
Reproduce steps:
Assume A, B, C are different app tasks.
When the application stack is like:
Top C
B
A
#Case 1: Home is foreground
A starts B with NEW_TASK, C will resume, focus still stays at Home, and window order does not update.
Then press back key or volumn key will result ANR on Home.
#Case 2: App is foreground (Resumed activity is C)
A starts Home, Home will resume, focus still stays at C, and window order does did not update.
Then press back key or volumn key will result ANR on C.
Change-Id: If05070123b248e2335791e43a4d4ddee6db11d84
Symptom: Unable to start any activity.
Root Cause: ActivityStack.mPausingActivity() points to a destroyed activity of a died process, so that ActivityStackSupervisor.allPausedActivitiesComplete() always returns false.
Solution: Set mPausingActivity to null in ActivityStack.cleanUpActivityLocked().
Reproduce steps:
a. Turn screen off.
b. A background service starts an activity X (in process X).
c. A background service starts a no-history activity Y (in process Y), but the main thread of Y was blocked.
d. A background service starts Y 3~4 times --> this causes am_failed_to_pause on X.
e. Main thread of Y is freed finally --> this causes Y crash for android.view.WindowManager$BadTokenException.
f. Turn screen on, X is shown on screen, but neither back key nor home key can work because mPausingActivity is Y.
Change-Id: I320b3db407e2d4cc745c8ca22a6e548742234242
In certain situations it was possible for a task to move to the top
in activity manager but not in window manager. This resulted in
the task appearing behind the launcher icons.
Fixes bug 13410184.
Change-Id: If0582b395e126a8aff70a0e4c64b731083c6ae8a
