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Xing Guo

PROFILE

Xing Guo

Worked on compiler and database infrastructure, delivering targeted improvements in C and C++ across two major repositories. In ROCm/llvm-project, added GNU-style format string attribute support to Clang Sema, introducing 'gnu_' aliases for functions like printf and scanf to enhance GCC compatibility and streamline code annotation. For microsoft/documentdb, implemented a compatibility fix by updating BSON-to-JSON conversion logic to use non-deprecated APIs, ensuring continued functionality with libbson 1.29.0+ and reducing upgrade risk. Demonstrated skills in compiler development, static analysis, and dependency management, focusing on maintainable, business-impactful solutions that facilitate smoother migrations and reliable data interchange.

Overall Statistics

Feature vs Bugs

50%Features

Repository Contributions

2Total
Bugs
1
Commits
2
Features
1
Lines of code
52
Activity Months2

Work History

September 2025

1 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary for ROCm/llvm-project: Key feature delivered in Clang Sema—GNU-style format string attributes support, with 'gnu_' aliases for printf, scanf, strftime, and strfmon to boost GCC compatibility and annotation flexibility. The change strengthens cross-compiler portability and facilitates easier migration for GCC-annotated code in ROCm/llvm-project, reducing annotation-related issues across codebases.

August 2025

1 Commits

Aug 1, 2025

August 2025 monthly summary focusing on key accomplishments and business impact for microsoft/documentdb. Implemented a critical compatibility fix to ensure BSON-JSON conversion remains functional with newer dependencies and deprecated APIs. What I delivered: - Updated PgbsonToLegacyJson to use bson_as_legacy_extended_json instead of deprecated bson_as_json, addressing deprecation and ensuring compatibility with libbson 1.29.0+ while preserving BSON-to-JSON conversion functionality. - Maintained accurate data interchange behavior for DocumentDB consumers during libbson/mongo-c-driver upgrades. Key outcomes: - Reduced upgrade risk by removing deprecated API usage and aligning with newer dependency versions. - Clear, auditable change with a single, well-scoped commit enabling easier code review and future maintenance. Technologies/skills demonstrated: - C/C++ integration and memory-safe handling of JSON/bson conversions - Dependency management and upgrade-path planning - Impact-focused coding with strong emphasis on business value and reliability.

Activity

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Quality Metrics

Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance80.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

CC++

Technical Skills

CC DevelopmentC++Compiler DevelopmentDatabaseJSONStatic Analysis

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

microsoft/documentdb

Aug 2025 Aug 2025
1 Month active

Languages Used

C

Technical Skills

C DevelopmentDatabaseJSON

ROCm/llvm-project

Sep 2025 Sep 2025
1 Month active

Languages Used

CC++

Technical Skills

CC++Compiler DevelopmentStatic Analysis