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A Benchmark of Data
Loss Bugs for Android
Apps
Oliviero Riganell
i

University of Milano Bicocca
joint work wit
h

Daniela Micucci Leonardo Mariani
Marco Mobilio
Recreating Android Activity
Runnin
g

(visible)
Destroyed
Created
Runnin
g

(visible)
create activity restore activity state
save activity state
1
2 3
https://disco.unimib.it
oliviero.riganelli
………….
Instance State
https://disco.unimib.it
oliviero.riganelli
………….
Recreating an Activity
h
t
t
p
s
:
/
/
d
i
s
c
o
.
u
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m
i
b
.
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e
r
o
.
r
i
g
a
n
e
l
l
i
…
…
…
…
.
Runnin
g

(visible)
Destroyed
save activity state
1
https://disco.unimib.it
oliviero.riganelli
………….
Instance State
Recreating an Activity
https://disco.unimib.it
oliviero.riganelli
………….
Created
create activity
2
h
t
t
p
s
:
/
/
d
i
s
c
o
.
u
n
i
m
i
b
.
i
t
o
l
i
v
i
e
r
o
.
r
i
g
a
n
e
l
l
i
…
…
…
…
.
Instance State
Recreating an Activity
https://disco.unimib.it
oliviero.riganelli
………….
https://disco.unimib.it
oliviero.riganelli
………….
Created
Runnin
g

(visible)
restore activity state
3
Instance State
Recreating an Activity
https://disco.unimib.it
oliviero.riganelli
………….
Data Loss
Instance State
https://disco.unimib.it
oliviero.riganelli
………….
h
t
t
p
s
:
/
/
d
i
s
c
o
.
u
n
i
m
i
b
.
i
t
Runnin
g

(visible)
Destroyed
save activity state
1
https://disco.unimib.it
oliviero.riganelli
………….
Data Loss
Instance State
https://disco.unimib.it
oliviero.riganelli
………….
Created
create activity
2
h
t
t
p
s
:
/
/
d
i
s
c
o
.
u
n
i
m
i
b
.
i
t
Instance State
Data Loss
https://disco.unimib.it
oliviero.riganelli
………….
https://disco.unimib.it
Created
Runnin
g

(visible)
restore activity state
3
Instance State
Data Loss
https://disco.unimib.it
oliviero.riganelli
………….
Created
Runnin
g

(visible)
onRestoreInstanceState()
3
Instance State
Data Loss
Randomly sets back to 100% and
auto brightness after using camera
The metronome is frustrating. I
use it when I practice but if I ever
stop it, and turn off the screen, it
resets to 40bpm and 4/4 time
As soon as I opened a comic
through this app I was really happy
given its functionality and ease of
use. But everytime I rotate the
screen, the app exits saying "
fi
le
could not be loaded"
Pervasiveness of Data Loss
Problems
APP APP APP APP APP
Pervasiveness of Data Loss
Problems
APP APP APP APP APP
Benchmark Construction
428 app repositories
1,420 apps in F-Droid
>10,000 downloads
>100 revisions
>1,000 LoCs
Filter
Benchmark Construction
428 app repositories
Keyword
Search
1,420 apps in F-Droid
>10,000 downloads
>100 revisions
>1,000 LoCs
Filter
Bug reports
Commits
2,500 data loss problems
Benchmark Construction
428 app repositories
Keyword
Search
1,420 apps in F-Droid
>10,000 downloads
>100 revisions
>1,000 LoCs
Filter
Bug reports
Commits
2,500 data loss problems
Manual
Investigation
App Runs
Source Code
110 reproducible data losses
in 48 apps
Benchmark Artefact
General info
App name Category
Issue Report
Benchmark Artefact
Fault Info
Version
APK
Source Code
Activity
General info
App name Category
Issue Report
Benchmark Artefact
Fault Info
Version
APK
Source Code
Activity
Fix Info
Version
APK
Source Code
General info
App name Category
Issue Report
Benchmark Artefact
Fix Info
Version
APK
Source Code
Test Case
@Test


public void rotateTest(){


view.sendKeys(text);


driver.rotate(LANDSCAPE);


assertEquals(text,view.getText());


}


https://
oliviero
………
https://
oliviero
………
https://disco.unimib.it
oliviero.riganelli
………….
Execution Info
Oracle
Tested API Target API
Fault Info
Version
APK
Source Code
Activity
General info
App name Category
Issue Report
https://gitlab.com/learnERC/DataLossRepository
Get Your Copy


Now!!!

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A Benchmark of Data Loss Bugs for Android Apps