Understanding the Kotlin to Dalvik bytecode translation
summary
Walks through a Dalvik recompiler project that uncovers concrete translation bugs and debugging steps: builds go from Kotlin/Java → class files → D8 → DEX → JIT/AOT machine code, uses ProGuard/R8 mappings and smali/baksmali to inspect output, and tries compiler explorer/godbolt for bytecode checks. Shows a reproducible failure where a method works normally but throws on reflection because an API-class missing on older Android plus aggressive renaming breaks overload resolution. Provides dex2oat and baseline-profile techniques to isolate JIT/AOT issues.
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chapters (10)
- 0:00Kotlin to Dalvik translation
- 1:52Kotlin to machine code
- 6:28Source to Java bytecode
- 9:40Java bytecode to DEX
- 14:53DEX tools and optimization
- 21:19Bytecode features
- 26:40DEX to machine code
- 32:56Translation in practice
- 36:49Common misunderstandings and bug patterns
- 37:57Q&A on suspend and JIT
