Dekompajliranje aplikacija pisanih u programskom jeziku Kotlin

undergraduate thesis

• Title (english): Decompilation of applications written in Kotlin programming language
• Author: Filip Todorić
• Mentor: Stjepan Groš (mentor)
• Committee member: Stjepan Groš (predsjednik povjerenstva)
• Committee member: Ivona Brajdić (član povjerenstva)
• Committee member: Karlo Slovenec (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2020-08-27, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

Dekompajler je alat za rekonstrukciju izvornog koda ne temelju izvršne datoteke. Alat s tom mogućnošću koristi se za dobivanje uvida u unutarnje strukture i ponašanje nekog programa. Ovaj rad fokusira se na dekompajliranje aplikacija operacijskog sustava Android pisanih u programskom jeziku Kotlin. Opisana je struktura aplikacije i predočena je osnovna sintaksa jezika Kotlin. Za potrebe dekompajliranja definirane su izvršne datoteke koje se dekompajliraju. Naveden je proces dekompajliranja i programsko ostvarenje dekompajlera koji ima određeni opseg točnosti generiranja izvornog koda. Pomoću primjera ispisa Java bajt kod instrukcija opisana je analiza pojedinih instrukcija i njihovih grupa ili idioma. Kroz primjere generiranog izvornog koda programski ostvarenog dekompajlera prokomentirani su dobiveni izrazi i strukture.

Abstract (english)

Decompiler is a tool for reconstructing source code from an executable file. A tool with that capability is used to gain an insight into the internal structures and behaviour of a program. This paper focuses on decompiling Android operating system applications written in Kotlin programming language. The structure of the application is described and the basic syntax of the Kotlin language is presented. For decompiling purposes appropriate executables files are defined which are to be decompiled. The decompilation process is described and software realization of the decompiler, with limited accuracy in generating source code, is presented. Using the examples of Java bytecode instructions of certain simple programs, the analysis of each instruction and their groups or idioms are described. Through the examples of the generated source code of the presented decompiler in this paper, different expressions and structures are discussed.

• Keywords: dekompajliranje; Android aplikacija; Kotlin; Java izvršna datoteka; analiza Java bajt kod instrukcija; JVM; analiza idioma; analiza kontrole toka; CFG; strukturiranje izvornog koda
• Keywords (english): decompilation; Android application; Kotlin; Java executable; Java bytecode instructions analysis; JVM; analysis of idioms; control-flow analysis; CFG; code structuring
• Language: croatian
• URN:NBN: urn:nbn:hr:168:331158
• Study programme: Title: Computing; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-14 10:08:01