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1. Getting Started

1.1 Running SetDroid via Virtual Machine

Requirements

  • You need to enable virtualization technology in your computer's BIOS, see this link for how to enable virtualization technology in the computer. Some computers have turned on virtualization by default.
  • Your computer needs at least 16G of memory, and at least 40G of storage.
  • VirtualBox: we built our artifact by using version 6.1.20.
  • Download the zip file from this link, and extract it.

Setting up (video tutorial)

  • Open VirtualBox, click "File", click "Import Appliance", then select the file named "SetDroid.ova" from the extracted contents (this step will take about five to ten minutes to complete).
  • After the import is completed, you should see "vm" as one of the listed VMs in your VirtualBox.
  • Click "Settings", click "System", click "Processor", and check "Enable Nested VT-x/AMD-V"
  • If you want to run the virtual machine more smoothly, you can click "Setting", click "Display", and then increase the value of "Video Memory" according to your situation.
  • Run the virtual machine. The username and the password are both "setdroid".
  • If you could not run the VM with "Nested VT-x/AMD-V" option enabled in VirtualBox, it may be because that you did not disable the Hyper-V option. You can disable Hyper-V launch temporarily. See this link for more information about that.
  • If you want to copy & paste from host to "vm", you can open the terminal and execute the following command (you may not need to do so, because the virtual machine already contains all the files needed to run the tool):
sudo apt-get install virtualbox-guest-additions-iso
sudo mkdir /media/temp
sudo mount /usr/share/virtualbox/VBoxGuestAdditions.iso /media/temp
  • Open the terminal and execute the following command:
/home/setdroid/Android/Sdk/emulator/emulator -avd Android8.0 -read-only -port 5554 &
  • Wait for the first Android emulator to start. After the emulator is successfully started, return to the command-line interface, press enter, and then execute the following command:
/home/setdroid/Android/Sdk/emulator/emulator -avd Android8.0 -read-only -port 5556 &
  • Wait for the second Android emulator to start. After the emulator is successfully started, return to the command-line interface, press enter, and then execute the following command:
cd /home/setdroid/SetDroid/Tool 
  • Then execute the following command (this step will take about five to ten minutes to complete):
python3 start.py -app_path /home/setdroid/SetDroid/App/a2dp.Vol.apk -append_device emulator-5554 -append_device emulator-5556 -android_system emulator8 -append_strategy display_immediate_1 -testcase_count 1 -choice 0 -event_num 50
  • At this point, SetDroid will start to run a round of example policy (Oracle checking rule I -immediate -display -1) on the example app ( A2DP Volume), which contains 50 events.
  • The target app can be modified by the configuration parameter -app_path. The number of runs can be modified by the configuration parameter -testcase_count. The number of events contained in each test can be modified by the configuration parameter -event_num. Setting change strategy can be changed through the configuration parameter -append_strategy. You can also add more strategies to make them be executed in sequence.
  • For example, the following command represents the sequential execution of two strategies (Oracle checking rule I - lazy - permission) and (Oracle checking rule II - language) on Amaze. Each strategy is executed 10 times, and each test contains 100 events (this command will take about one to two hours to complete, and you can interrupt the command through Ctrl-C at any time):
python3 start.py -app_path /home/setdroid/SetDroid/App/com.amaze.filemanager.apk -append_device emulator-5554 -append_device emulator-5556 -android_system emulator8 -append_strategy permssion_lazy_1 -append_strategy language -testcase_count 10 -event_num 100

1.2 Building and Running SetDroid From Scratch

Requirements

  • Download all the files from this link
  • Download all the apps from this link
  • Android SDK: API 26+
  • Python 3.8
  • We use some libraries (uiautomator2, androguard, cv2, langid, numpy) provided by python, you can add them as prompted, for example:
pip3 install langid

Setting up

You can create an emulator before running SetDroid. See this link for how to create avd using avdmanager. The following sample command will help you create an emulator, which will help you to start using SetDroid quickly:

sdkmanager "system-images;android-26;google_apis;x86"
avdmanager create avd --force --name Android8.0 --package 'system-images;android-26;google_apis;x86' --abi google_apis/x86 --sdcard 512M --device "pixel_xl"

Next, you can start two identical emulators and assign their port numbers with the following commands:

emulator -avd Android8.0 -read-only -port 5554
emulator -avd Android8.0 -read-only -port 5556

Run

If you have downloaded our project and configured the environment, you only need to enter download_path/tool to execute our sample app with the following command:

python3 start.py -app_path /home/setdroid/SetDroid/App/a2dp.Vol.apk -append_device emulator-5554 -append_device emulator-5556 -android_system emulator8 -append_strategy display_immediate_1 -testcase_count 1

SetDroid provides several ways to test android apps by command lines. You need to view configuration help through the following commands and change them.

python3 start.py --help

2 Detailed Description

2.1 All Optional Parameters of SetDroid

  • -pro_click The proportion of click events, which is 45% by default.
  • -pro_longclick The proportion of long-press events, which is 25% by default.
  • -pro_scroll The proportion of scroll events, which is 5% by default.
  • -pro_home The proportion of click home button events, which is 0% by default.
  • -pro_edit The proportion of edit events, which is 15% by default.
  • -pro_naturalscreen The proportion of rotating to natural events, which is 1% by default.
  • -pro_leftscreen The proportion of rotating to left events, which is 8% by default.
  • -pro_back The proportion of click back button events, which is 1% by default.
  • -pro_splitscreen The proportion of split-screen events, which is 0% by default.
  • -app_path the APK address of the app you want to test.
  • -append_device The serial numbers of devices used in the test, which can be obtained by executing "adb devices" in the terminal.
  • -android_system The Android system of the test device, At present, only Android 8.0 system is supported.
  • -root_path The storage path of the output file.
  • -resource_path The path of the resource file that you want to import into the test devices in advance.
  • -testcase_count The number of rounds that you want to test for each strategy.
  • -event_num The number of events in per round of test.
  • -setting_random_denominator Used to adjust the frequency of setting change event insertion.
  • -append_strategy The strategies that you want to use (multiple test strategies can be executed in sequence), currently, the supported strategies are as follows, corresponding to the 14 strategies listed in Table 5 of the paper.
Strategy name Setting Oracle rule Injection strategy Pair of events for setting changes
network_immediate_1 Network I Immediate ⟨turn on airplane, turn off airplane⟩
network_lazy_1 Network I Lazy ⟨turn on airplane, turn off airplane⟩
network_lazy_2 Network I Lazy ⟨switch to mobile data, switch to Wi-Fi⟩
location_lazy_1 Location I Lazy ⟨turn off location, turn on location⟩
location_lazy_2 Location I Lazy ⟨switch to "device only", switch to "high accuracy"⟩
sound_lazy_1 Sound I Lazy ⟨turn on "do not disturb", turn off "do not disturb"⟩
battery_immediate_1 Battery I Immediate ⟨turn on the power saving mode, add the app into the whitelist⟩
battery_lazy_1 Battery I Lazy ⟨turn on the power saving mode, turn off the power saving mode⟩
display_immediate_1 Display I Immediate ⟨switch to landscape, switch to portrait⟩
display_immediate_2 Display I Immediate ⟨turn on multi-window, turn off multi-window⟩
permssion_lazy_1 Permission I Lazy ⟨turn off permission, turn on permission⟩
developer_lazy_1 Developer I Lazy ⟨turn on "Don’t keep activities", turn off "Don’t keep activities"⟩
language Language II - ⟨change system language, -⟩
time Time II - ⟨change hour format, -⟩

2.2 Description of Output Files (video tutorial)

  • The output path of the tool is in /home/setdroid/SetDroid/Root.
  • The result files of each app are classified and stored in /home/setdroid/SetDroid/Root.
  • Open the folder of an app, and you will see the result files of each strategy for this app are stored by category.
  • Open the folder corresponding to a strategy, and you will see an error_realtime.txt file, a wrong_realtime.txt file, and many numbered folders correspond to each round of test results.
  • Open a numbered folder, and you can see a read_trace.txt file, a trace.txt file, an i_trace.html file, and a folder named screen.
  • Open the screen folder, and you can see the screenshot of each step and the corresponding interface layout information file.
  • Next, I will introduce the content and use of each file.

error_realtime.txt

This file records the sequences that trigger the setting defects, which start with Start::x::run_count::y (x means the x-th error and Y means the error was captured during the y-th round of execution), and end with End::

wrong_realtime.txt

This file records the sequences that trigger the suspected setting defects.

read_trace.txt

This file records the execution sequence of SetDroid, which is easy for SetDroid users to read.

trace.txt

This file records the execution sequence of SetDroid, which can be read and replayed by SetDroid.

i_trace.html

This file records the sequence of screenshots after each step, which is arranged horizontally. The events executed at each step are marked on the screenshot. After opening the file in the browser, there is a drag bar at the bottom, which can drag horizontally to view the whole sequence. When the error is captured, the screenshot is marked with a red frame. When the two interfaces are different, the screen capture is marked with a yellow frame.

2.3 Study Dataset

Download the zip file (Study.zip) from this link, and extract it.

project_lists.xlsx

This file contains all the Android projects officially released on Google Play and F-Droid that we obtained through GitHub's REST API. We listed their repo names, the number of closed issues, the number of open issues, and the number of stars on GitHub. We keep the apps with more than 200 issues in this list as study objects, a total of 180 apps.

app_infomation.xlsx (corresponding to Figure 2 in our paper)

This file contains all the information (star numbers, issue numbers, installations, and categories) of our study objects, corresponding to the data in Figure 2 in the paper.

setting_keyword_issues.xlsx

This file contains all issues of 180 apps obtained through keyword filtering. We listed their repo name, URL, open time, closed time, and setting keywords mentioned in the issue.

study_list.xlsx (corresponding to Table 3 in our paper)

This file contains 1,074 setting issues of 180 apps that we obtained through manual inspection. For each issue, we listed its URL, consequence, whether it was closed, whether it was repaired, the length of the reproduce steps reported by the reporter, the setting that caused the issue, and the root cause of the issue.

specific_APIs_list.xlsx

This file lists the specific APIs that we used when investigating the usage of settings in the apps. We listed their corresponding setting categories, the classes they belong to, and the forms used in the static analysis.

usage_of_settings.xlsx (corresponding to Table 2 in our paper)

This file lists the APIs related to the setting categories used by each app. For each app, we counted the usage of six settings. The number 1 means that at least one API corresponding to this setting category has been detected in the code of the app.

2.4 Evaluation Data

  • Download the zip file (Evaluation.zip) from this link, and extract it. It contains the test results of open-source apps. Due to trade secrets, bug reports and running paths of five industrial apps cannot be disclosed.

Bugs (corresponding to Table 8 and Table 6 in our paper)

  • The file called bug list.md records the information of 42 bugs reported by SetDroid and bugs detected by PatDroid, corresponding to columns 5-8 in Table 8 and the last four columns in Table 6 in our paper

TP and FP (corresponding to the last four columns in Table 6 in our paper)

  • The trace of all errors (both TP and FP) reported by SetDroid in Table 6 and the screenshot after each step are stored in the TP and FP folder. Note that the tool has been reconstructed in the process of running the experiment, so the format of the output file is slightly different. The total running times are shown in section 4.3.
  • There are 24 folders in TP and FP, corresponding to 24 apps in the second column of Table 6 of the paper. Each folder is named by the package name of the app. For the corresponding relationship between package name and app name, see app_infomation.xlsx (in section 2.1.2).
  • Under each app folder, there are two folders TP and FP, and each folder has two folders Rule1 and Rule2, corresponding to the last four columns in Table 6. That is, /FP/Rule1/ corresponds to the column FPI of Table 6, /TP/Rule1/ corresponds to the column TPI of Table 6, /FP/Rule2/ corresponds to the column FPII of Table 6, /TP/Rule2/ corresponds to the column TPII of Table 6.
  • For errors detected by using Oracle checking rule I, as context information is needed to reproduce the errors, SetDroid will record in detail the trace that triggers each error (stored in the trace.txt file), the screenshots and interface layout files after each step (stored in the screen folder).
  • For errors detected by using Oracle checking rule II, SetDroid will simply record the screenshots and interface layout files with errors, as well as fields that are not converted correctly according to settings (recorded in language.txt or time.txt).
  • For example, if you want to verify the data of the last app Habits in Table 6, you can open the directory org.isoron.uhabits in the directory /TP and FP/ . In Table 6, the FPI of Habits is 2, TPI is 2, FPII is 0 and TPII is 1, so:
    • /Evaluation/TP and FP/com.tom.alwayson/FP/rule1/ has two folders (1_time, and 2_time), corresponding to two FPs caused by changing time setting.
      • For example, /Evaluation/TP and FP/com.tom.alwayson/FP/rule1/1_time/ have a folder screen and a file trace.txt. Open folder screen to see the interface information of the app before executing each step in trace.txt on two different devices, such as 1_emulator-5554 corresponds to the interface information before the execution of the first step in device emulator-5554. 1_emulator-5556 corresponds to the interface information before the execution of the first step in device emulator-5556. However, as the device emulator-5554 uses 12 hour format and the device emulator-5556 uses 24 hour format, after the execution of step 18, the clock styles of the device emulator-5554 and the device emulator-5556 are different, so the step 19 can be executed on the device emulator-5554, but can not be executed on the emulator-5556, so SetDroid reports an error. After manual confirmation, we think that this is not a bug, so we classify it in FP.
    • /Evaluation/TP and FP/com.tom.alwayson/TP/rule1/ has two folders (1_rotate, and 2_rotate), corresponding to two FPs caused by changing display setting (rotating screen).
    • /Evaluation/TP and FP/com.tom.alwayson/FP/rule2/ has no content.
      • For example, /Evaluation/TP and FP/com.tom.alwayson/FP/rule1/1_rotate/ have a folder screen and a file trace.txt. Open folder screen to see the interface information of the app before executing each step in trace.txt on two different devices, such as 1_emulator-5554 corresponds to the interface information before the execution of the first step in device emulator-5554. 1_emulator-5556 corresponds to the interface information before the execution of the first step in device emulator-5556. As the device emulator-5556 rotated screen after step 15, so the user's choice of time is lost. As the result, the step 18 can be executed on the device emulator-5554, but can not be executed on the emulator-5556, so SetDroid reports an error. After manual confirmation, we think that this is a bug with the consequence of data lost, so we classify it in TP.
    • /Evaluation/TP and FP/ com.tom.alwayson/TP/rule2/ has a folder language, in which six TPs detected after changing the language setting are recorded.

2.5 Tool Extension

If someone wants to extend the artifact, they can modify it in the following position of the tool.

Add settings change strategy

Add a new setting change function in injector.py, and add calls to it to change_setting_before_run or inject_setting_during_run as needed.

Add seed test generation policy

Add a new exploration class according to RandomPolicy class in policy.py, and inherit the Policy class

Add a new check condition

Add a new check function in check.py and call it in the corresponding position in the executor.py

3 Reusibility Statement

We wish to argue that our artifact (SetDroid) should receive an "Artifacts Evaluated - Reusable" badge based on the following points.

  • SetDroid is a fully automated, end-to-end GUI testing tool for finding system setting-related defects in Android apps. A user can simply run SetDroid on a given app via command lines, and SetDroid will automatically detect likely setting defects and outputs the corresponding bug reports. To ease bug confirmation, SetDroid provides visual bug reports.

  • SetDroid is comprehensively documented in README, and Section 2.5 ("Tool Extension") describes several plausible scenarios on how to extend, customize and improve SetDroid.

  • The artifact contains all the source code of SetDroid and the virtual machine image (everything is set up). A user can directly use and extend SetDroid from the source code or the VM image. We also provide video tutorials on setting up the tool and illustrating the tool usage.

  • The artifact contains the other documentations that describe the use case scenarios and other details of SetDroid. For example, it lists all the supported configuration options/strategies, explains the different types of the output files, and provides all the evaluation data in the original paper.

  • SetDroid is well-designed and its source code is easy to understand with necessary comments.

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