Root Cause:
There is a defect in current ProcessStats design
and following is the scenario:
1. Process A is started due to activity with
name of A
2. Process A creates ProessState with application
uid of A
3. Process B is started due to isolated service
declared in application A with name of A
4. Process B uses ProcessState of Process A as
it uses same application uid of A
5. Process B is finished and it leads to
ProcessState marked as dead
6. Process A still keeps using the invalid
ProcessState in dead state
7. IndexOutOfBoundsException is triggered when
system tries to update process state of Process A
Resolution:
use process uid to replace application uid for
getProcessStatLocked.
Change-Id: I881ad9fc492c9e1a892c9e957180cebcfef8352d
Signed-off-by: Ronnie Leng <ronnie.leng@gmail.com>
app_main.c gets sys/stat.h inherited from
private/android_filesystem_config.h it should
not rely on this in the future. The intent is
to move fs_config function into libcutils and
thus deprecate any need for sys/stat.h in this
include file.
Bug: 19908228
Change-Id: I477b825e582742113f849aaa1df50c41e496b6f6
Symptom:
Report ANR on wrong activity.
Reproduce steps:
(All launchMode, taskAffinity are default and
without additional intent flag)
Case 1:
1.Launch activity A from launcher.
2.Activity A starts B activity.
3.Press home key.
4.Launch activity A from launcher (B is top).
5.Press back key twice to finish B and A,
A sleep 10s in onResume.
6.ANR will report on launcher.
Case 2:
1.Launch activity A from launcher.
2.Press home key.
3.Kill process of A.
4.Launch activity A from launcher.
5.A sleep 10s in onResume, press back key immediately.
6.ANR will report on launcher.
Possible root cause:
Focused activity will not be updated every time when activity
resumed. (the condition to call setFocusedActivityLocked)
Case 1:
Launcher was stopped and not waitingVisible due to launcher
is not the previous one, then getWaitingHistoryRecordLocked
has no chance to correct the real ANR activity.
Case 2:
Due to process of next activity is died, bring existed
task will not set mResumedActivity (it will be set when its
process is started), so when assigning waitingVisible from
processStoppingActivitiesLocked, the return value of
allResumedActivitiesVisible will be true even there is no
mResumedActivity. That results set waitingVisible to false
to previous activity (e.g. launcher), then also cannot
correct ANR target as case 1.
Change-Id: I0b24f46a8fab266382ebc6e2ed84ebeca9358768
Application may use many threads to load data from provider.
If the target provider needs to start process, each access
will occupy one binder thread of system server until the
provider process started and published.
Sometimes application uses more than 16 threads to access
the same provider, and the provider process needs a little
long time to start, then all binder threads of system server
are waiting. But when the provider is ready, it is unable to
publish to notify those waiting threads because no availabe
binder thread to use. And device will become almost hang.
Improvement:
If there is already a thread acquiring provider, let other threads
(which try to acquire the same provider) wait the result of the
first one. That reduces IPC to save binder thread of system server.
Remove calling removeContentProvider in installProvider because
we have ensured only get one provider holder for the same provider,
the original race that gets a new useless holder will not happen.
Change-Id: I521f2603db8ced56912f5dc54342a70451e68381
This adds AndroidKeyStore.getKeyStoreOperationHandle method which can
be used to obtain the KeyStore operation handle corresponding to the
provided JCA cryto primitive (provided it's backed by
AndroidKeyStore).
Bug: 18088752
Change-Id: Iaa3b6f9b2281b2ec2de8fd5946d353dc7fdb3d2d
Also fixed the line breaks in android:configChanges so the syntax
code box doesn't need a horizontal scroll bar.
See first comment for doc stage location.
bug: 19935160
Change-Id: I1ec34473e743a9f0c921f771cfb47129c47f9014
This factory provides a way to obtain information about a SecretKey
backed by AndroidKeyStore. The information is provided in a form of an
instance of KeyStoreKeySpec class.
EXAMPLE
SecretKeyFactory factory = SecretKeyFactory.getInstance(
key.getAlgorithm(), "AndroidKeyStore");
KeyStoreKeySpec keySpec =
factory.getKeySpec(key, KeyStoreKeySpec.class);
Bug: 18088752
Change-Id: I26c9dd544f80230fe7039501eeb471eaf875452b
record
Symptom:
Unable to launch activity
Root cause:
There are some cases that would start process while pid
assigned or already running. So the previous application
record will be clean up via handleAppDiedLocked(), but it
won't be removed from ActivityManager.mProcessNames since
the process is supposed to be restart later.
However, if the process is started from a background
operation and has named as a bad process, it silently fail
the launch. Then, the process won't ever be request to
start afterward. The process status is app.pid > 0 and
app.thread is null.
The application components are unable to launch since then.
Solution:
Examine bad process before clean up application record
Change-Id: I53dc06e49254094abc06e460c8b8b33f36803601
Check dalvik.vm.dex2oat-threads in AndroidRuntime and pass to ART
with "-j" as a compiler option, if found.
Check dalvik.vm.image-dex2oat-threads in AndroidRuntime and pass to
ART with "-j" as an image compiler option, if found.
Bug: 19992386
(cherry picked from commit e0352388238875ef7e7b31d914fc903b08ff0f6b)
Change-Id: I5e7806cf560607d31a1d6901dffb14bee538c9cc
Symptom:
System server crash.
Root Cause:
The value curProcState for array index is -1 if the process
has not attached yet.
Solution:
Skip computing for process which is not attached or curProcState
is nonexistent state.
Change-Id: I71aaf45bb78d73097ebe9dfebf76b72f2d243232
