Added WALA config and Troubleshooting sections.
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README.md
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README.md
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@ -39,6 +39,14 @@ wget https://bitbucket.org/iBotPeaches/apktool/downloads/apktool_2.0.0.jar
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mvn install:install-file -Dfile=apktool_2.0.0.jar -DgroupId=apktool -DartifactId=apktool -Dpackaging=jar -Dversion=2.0.0
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```
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### WALA configuration
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WALA needs to know the location of the Java 6 JDK. This is configured in the ``wala.properties`` file, e.g.
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```
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cd DASCA/
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echo "java_runtime_dir = /usr/lib/jvm/java-6-jdk" >> externals/WALA/com.ibm.wala.core/dat/wala.properties
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```
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Don't forget to adjust the path to the Java 6 JDK accordingly.
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### How to Compile
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First resolve the dependencies using maven:
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```
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@ -53,6 +61,23 @@ workspace using `File -> Import -> Maven -> Existing Maven Projects`:
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While some Wala projects may contain compilation errors, all DASCA
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projects (i.e., `eu.aniketos.dasca.*`) should compile without errors.
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## Troubleshooting
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### Unavailable external JARs
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The build process for WALA uses Ant scripts to download JAR libraries from third-party web sites, which might
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become unavailable. This leads to Maven throwing errors when compiling WALA due to unavailable JAR files, e.g.
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```
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[ERROR] DASCA/externals/WALA/com.ibm.wala.cast.js.test.data/build.xml:45: Can't get http://ajaxslt.googlecode.com/files/ajaxslt-0-7.tar.gz to DASCA/externals/WALA/com.ibm.wala.cast.js.test.data/temp.folder/ajaxslt-0-7.tar.gz
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```
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If the affected sub-project is not needed for the DASCA projects (such as the com.ibm.wala.cast.js.test.data
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project), the error might be resolved by skipping the compilation of a few WALA projects, e.g.
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```
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mvn -P wala -pl '!:com.ibm.wala.cast.js.test.data,!:com.ibm.wala.cast.js.html.nu_validator,!:com.ibm.wala.cast.js.test,!:com.ibm.wala.cast.js.rhino.test' install -DskipTests=true -q
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```
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### WALA throws errors such as ``java.lang.Error: unexpected dynamic invoke type 8``
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Make sure the ``wala.properties`` file is correctly configured with the path to the Java 6 JDK. By default,
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WALA uses the JDK that is runs with also for the analysis, which is likely to be Java 8.
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## Team
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Main contact: [Achim D. Brucker](http://www.brucker.ch/)
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