tezos/riscv-pvm
May 2025 – Oct 2025
6 Months active
Languages Used
RustMarkdownShellAssembly
Technical Skills
Compiler DevelopmentCompiler optimizationEmbedded SystemsLow-level programmingRISC-VRISC-V Architecture
Kurtis Charnock
PROFILE
Kurtis Charnock
Kurtis Charnock developed core system and signal handling features for the tezos/riscv-pvm repository, focusing on RISC-V architecture and Rust. Over six months, Kurtis implemented robust system call support, enforced privilege boundaries, and overhauled signal handling to align with POSIX semantics. He introduced performance optimizations, centralized parameter validation, and strict filesystem access controls, improving both security and maintainability. His work included modularizing signal-related logic, supporting per-thread signal context, and leveraging zerocopy for efficient data handling. Through targeted code cleanup and comprehensive documentation, Kurtis ensured the codebase remained clear, maintainable, and ready for future multi-threading and policy-driven enhancements.
Overall Statistics
Feature vs Bugs
87%Features
Repository Contributions
33Total
Bugs
2
Commits
33
Features
13
Lines of code
3,415
Activity Months6
Your Network
27 people
Work History
October 2025
1 Commits • 1 Features
Oct 1, 2025Month: 2025-10 | tezos/riscv-pvm focused on code cleanliness and maintainability. Delivered a targeted code cleanup removing a stale TestCacheConfig reference in test_proofs.rs, reflecting updated configuration without affecting functionality.
1 Commits • 1 Features
Oct 1, 2025Month: 2025-10 | tezos/riscv-pvm focused on code cleanliness and maintainability. Delivered a targeted code cleanup removing a stale TestCacheConfig reference in test_proofs.rs, reflecting updated configuration without affecting functionality.
October 2025
September 2025
9 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary focusing on tezos/riscv-pvm: key signal handling and LinuxSigAction improvements delivered to boost reliability, performance, and maintainability of the RISC-V PVM. Implemented a robust signal disposition model, immutable dispositions for critical signals, SA_SIGINFO-based handler selection, and synchronous signal support; fixed kernel RISC-V sigaction struct fields; added zerocopy LinuxSigAction read/write to reduce IO overhead; expanded tests coverage and documentation clarifications for rt_sigaction.
September 2025
9 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary focusing on tezos/riscv-pvm: key signal handling and LinuxSigAction improvements delivered to boost reliability, performance, and maintainability of the RISC-V PVM. Implemented a robust signal disposition model, immutable dispositions for critical signals, SA_SIGINFO-based handler selection, and synchronous signal support; fixed kernel RISC-V sigaction struct fields; added zerocopy LinuxSigAction read/write to reduce IO overhead; expanded tests coverage and documentation clarifications for rt_sigaction.
August 2025
7 Commits • 1 Features
Aug 1, 2025Month: 2025-08 — Delivered foundational RISC-V signal handling for tezos/riscv-pvm. Key outcomes: established core data structures and actions for handling signals on RISC-V (sigaction storage, per-thread signal mask/context management), integrated signal action storage/retrieval and stack-based push/pop of signal context, and added support for rt_sigprocmask(2) with error handling. Also performed focused code cleanup in the PVM common module to reduce confusion and improve maintainability. These changes lay the groundwork for correct signal semantics on RISC-V, enabling more robust inter-thread signaling and future system-call plumbing.
7 Commits • 1 Features
Aug 1, 2025Month: 2025-08 — Delivered foundational RISC-V signal handling for tezos/riscv-pvm. Key outcomes: established core data structures and actions for handling signals on RISC-V (sigaction storage, per-thread signal mask/context management), integrated signal action storage/retrieval and stack-based push/pop of signal context, and added support for rt_sigprocmask(2) with error handling. Also performed focused code cleanup in the PVM common module to reduce confusion and improve maintainability. These changes lay the groundwork for correct signal semantics on RISC-V, enabling more robust inter-thread signaling and future system-call plumbing.
August 2025
July 2025
4 Commits • 2 Features
Jul 1, 2025Month: 2025-07 — Tezos/riscv-pvm performance and delivery highlights. Two major feature deliveries focused on documentation quality and signal handling architecture, with no reported major bugs fixed this month. Overall impact centers on maintainability, clarity of the PVM signal path, and groundwork for future POSIX compatibility.
July 2025
4 Commits • 2 Features
Jul 1, 2025Month: 2025-07 — Tezos/riscv-pvm performance and delivery highlights. Two major feature deliveries focused on documentation quality and signal handling architecture, with no reported major bugs fixed this month. Overall impact centers on maintainability, clarity of the PVM signal path, and groundwork for future POSIX compatibility.
June 2025
10 Commits • 6 Features
Jun 1, 2025June 2025 monthly summary for tezos/riscv-pvm: delivered core system call support, security hardening, and maintainability improvements. Shifted default branch to main, added robust parameter validation, implemented resource control (prlimit64) and IOCTL stub, and enforced filesystem access denial policy. These changes improve reliability, security, and readiness for multi-process/threading and policy-driven runtime behavior.
10 Commits • 6 Features
Jun 1, 2025June 2025 monthly summary for tezos/riscv-pvm: delivered core system call support, security hardening, and maintainability improvements. Shifted default branch to main, added robust parameter validation, implemented resource control (prlimit64) and IOCTL stub, and enforced filesystem access denial policy. These changes improve reliability, security, and readiness for multi-process/threading and policy-driven runtime behavior.
June 2025
May 2025
2 Commits • 1 Features
May 1, 2025May 2025 monthly highlights for tezos/riscv-pvm: delivered performance-optimized changes to the RISC-V PVM and tightened security by removing privileged instructions, delivering measurable business value and maintainable code. Impact: Improved runtime efficiency for the PVM compilation threshold path and a smaller security surface by enforcing user-mode instruction boundaries. The changes align with the spec and simplify future maintenance.
May 2025
2 Commits • 1 Features
May 1, 2025May 2025 monthly highlights for tezos/riscv-pvm: delivered performance-optimized changes to the RISC-V PVM and tightened security by removing privileged instructions, delivering measurable business value and maintainable code. Impact: Improved runtime efficiency for the PVM compilation threshold path and a smaller security surface by enforcing user-mode instruction boundaries. The changes align with the spec and simplify future maintenance.
Activity
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Quality Metrics
Correctness93.6%
Maintainability91.8%
Architecture91.2%
Performance86.0%
AI Usage20.6%
Skills & Technologies
Programming Languages
AssemblyMarkdownRustShell
Technical Skills
Code CleanupCompiler DevelopmentCompiler developmentCompiler optimizationConfiguration ManagementDocumentationEmbedded SystemsEmbedded systemsEmulator DevelopmentError HandlingException HandlingKernel developmentLow-Level DevelopmentLow-Level ProgrammingLow-level Programming
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