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Change Log

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

[3.0.1] - 2025

Major Refactoring

  • Extracted BaseGenerator ABC from 5 duplicated generator classes (12,924 → 4,767 lines)
  • Created GeneratorState dataclass replacing 13 mutable instance variables
  • Extracted BaseFuzzer from duplicated Fuzzer/NatchFuzzer (1,602 → 891 lines)
  • Moved ContextGenerator and NatchGenerator to separate modules
  • FuzzDataProviderGenerator reduced from 2,715 to 222 lines
  • BlobStamperGenerator reduced from 2,693 to 37 lines

New Features

  • Custom exception hierarchy (futag.exceptions: FutagError, InvalidPathError, etc.)
  • Python logging module integration (replaces print statements)
  • GeneratorState.save()/restore_from() for clean recursive backtracking
  • GitHub Actions CI (python-tests.yml, syntax-check.yml)

Bug Fixes

  • Fixed null-pointer dereference in FutagConsumerAnalyzer (cfg->size() before null check)
  • Fixed memory leak in FutagConsumerAnalyzer (new int() instead of new int[])
  • Fixed param_list duplication bug in __save_old_values
  • Fixed 14+ file handle leaks (bare open() → with statements)
  • Fixed _build_ovearall_coverage typo → _build_overall_coverage
  • Replaced bubble sort in sort_callexprs with sorted()

Documentation

  • Created docs/architecture.md, docs/generators.md, docs/checkers.md, docs/python-api.md
  • Created CONTRIBUTING.md
  • Added comprehensive docstrings and return type hints to all methods
  • Added GPL v3 license headers to all Python source files
  • Translated template-script.py comments from Russian to English

C++ Checker Improvements

  • Added MAX_CFG_BLOCKS and REPORT_FILENAME_RAND_LEN constants
  • Changed SmallString<0> to SmallString<256>
  • Added Doxygen comments to all checker methods
  • Synchronized base files with LLVM 18 variants

20250824

  • Add support for Fuzzed Data Provider

20230807

20230711

20230522

  • Fix error in generator
  • Add generation for pugi::char_t *&

20230417

  • Add generation for anonymous function
  • Fix error in Builder

20230320

  • Support for context generation

20230305

  • Fix error python in Builder
  • Fix error python in Generator for wchar_t string

20230214

  • Add is_simple for 4consummer_analysis_db
  • Add CFG and DFC analysis
  • Add Fuzzer extra params support

20221220

  • Fix errors while compiling AFL++, return coverage parameters
  • Fix Readme
  • change LLVM_ENABLE_ZLIB to ON

20221107

  • And generation for anonymous functions
  • Reformat Python classes
  • Fix included paths of compiling command

20221018

  • Add support for C++, generate for constructors and for method of class, which has default constructors
  • Tested on FreeImage and Pugixml

20221012

  • Add support for AFLplusplus
  • Add possibility of building LLVM with different version (12, 13, 14)
  • Add analysis for classes, structs, unions...
  • Add compilition database of building
  • Add analysis of headers

20220921

20220911

  • Add support for fuzz-introspector
  • Migrate to llvm-14.0.6

20220821

  • Fix bug in generator
  • Add release package
  • Fix document

20220811

  • Fix bug in generator
  • Add pre release package
  • Fix document

20220808

  • Fix bug in generator
  • Fix for svace analysing
  • add first version of fuzzer and result of Fuzzing for Svace

20220801

  • Add multi-processing support for compiling
  • TODO: Check analysis result befor generating fuzz-driver

20220727

  • Add custom-llvm: download and build llvm, clang, compiler-rt
  • Fix document

20220716

  • Add modules preprocessor to Futag python-package
  • Fix README of Futag python-package