Month: 2025-05 Overview: In May 2025, I focused on enhancing the accuracy and reliability of glibc heap debugging within radare2. The work reduces debugging guesswork and improves cross-platform correctness, enabling faster diagnosis of heap-related issues and more trustworthy analysis across 32- and 64-bit environments. What was delivered: - Glibc Heap Debugging Accuracy Improvements: Corrected the SZ definition in r_heap_glibc.h to reflect system bitness, ensuring accurate size calculations for heap commands. Refined main_arena offset resolution and relocation-based address calculation to provide more precise debugging data. Supported by a new test verifying behavior across multiple malloc calls. - Commit-backed changes: Implemented two targeted commits that hardened heap debugging accuracy and address calculation. Impact and business value: - More reliable and faster debugging of heap-related issues, reducing mean time to diagnosis for complex memory bugs. - Improved cross-platform accuracy (32/64-bit) in glibc heap command outputs, increasing confidence in analysis results. - Strengthened test coverage around multiple malloc scenarios, contributing to long-term stability of the heap debugging workflow. Technologies/skills demonstrated: - C, memory allocator internals, and glibc heap structures - Precision in address calculation via relocation-based methods - Test-driven development and regression testing - Version control discipline with focused, reproducible commits Repository: radareorg/radare2 Key commits: - 210fa6d614805357e5dd4556d2f9101de2fdbb85: Fix SZ for heap commands ##debug - 682c2b3bb3ca9a7a43e2b07c260d4c0522555169: Fix main_arena resolution via relocations ##debug