espressif/llvm-project
Dec 2024 – Jan 2025
2 Months active
Languages Used
C++
Technical Skills
Assembly LanguageCompiler DevelopmentCompiler InternalsDebuggingLow-Level ProgrammingTesting
bernhardu
PROFILE
Bernhardu
Worked on the espressif/llvm-project repository to enhance the reliability of Windows ASan instrumentation by improving the GetInstructionSize logic within the interception library. Focused on robust handling of x86 and x64 opcode patterns, the work consolidated and extended instruction size recognition, addressing edge cases and expanding compatibility for ASan-built executables, particularly with llvm-mingw. Leveraged C++ and deep knowledge of assembly language, compiler internals, and Windows API to implement and validate these changes through targeted unit tests. The improvements reduced debugging friction, improved tooling accuracy, and addressed issues reported by Wine and LLVM, resulting in safer profiling and debugging workflows.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
6Total
Bugs
0
Commits
6
Features
2
Lines of code
39
Activity Months2
Your Network
289 peopleWork History
January 2025
2 Commits • 1 Features
Jan 1, 2025January 2025 highlights for espressif/llvm-project: Implemented robust GetInstructionSize improvements for Windows ASan/x64, enhancing reliability of instruction-size decoding used by instrumentation and debugging workflows. The work combined changes to interception_win.cpp, added a targeted test for the 8D A4 24 ... instruction, and refined the rel_offset explanation for hotpatch/trampoline hooking. Expanded size recognition to cover additional 5-byte x86/x86_64 instructions, improving compatibility for ASan-built executables with llvm-mingw. These changes address Wine/LLVM-reported issues, reduce debugging friction, and improve tooling accuracy across Windows x64 builds.
2 Commits • 1 Features
Jan 1, 2025January 2025 highlights for espressif/llvm-project: Implemented robust GetInstructionSize improvements for Windows ASan/x64, enhancing reliability of instruction-size decoding used by instrumentation and debugging workflows. The work combined changes to interception_win.cpp, added a targeted test for the 8D A4 24 ... instruction, and refined the rel_offset explanation for hotpatch/trampoline hooking. Expanded size recognition to cover additional 5-byte x86/x86_64 instructions, improving compatibility for ASan-built executables with llvm-mingw. These changes address Wine/LLVM-reported issues, reduce debugging friction, and improve tooling accuracy across Windows x64 builds.
January 2025
December 2024
4 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for espressif/llvm-project: Focused on instrumentation reliability improvements for Windows ASan in the interception library. Implemented robust GetInstructionSize handling across multiple opcode patterns on Windows x86/x64, consolidating logic, extending coverage, and adding tests to validate all patterns. Result: more reliable and safe instrumentation with reduced edge-case failures, enabling safer profiling and debugging on Windows builds.
December 2024
4 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for espressif/llvm-project: Focused on instrumentation reliability improvements for Windows ASan in the interception library. Implemented robust GetInstructionSize handling across multiple opcode patterns on Windows x86/x64, consolidating logic, extending coverage, and adding tests to validate all patterns. Result: more reliable and safe instrumentation with reduced edge-case failures, enabling safer profiling and debugging on Windows builds.
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Quality Metrics
Correctness93.4%
Maintainability90.0%
Architecture90.0%
Performance93.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++
Technical Skills
Assembly LanguageCompiler DevelopmentCompiler InternalsDebuggingDebugging ToolsLow-Level ProgrammingTestingUnit TestingWindows APIWindows DevelopmentWindows Internals
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