libriscv/libriscv

Health v2 · maintenance only

Adoption not part of the score

1130 stars · 93 forks observed · 2026-10-20

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

libriscv is an embeddable C++20 RISC-V (RVA23) userspace emulator and sandboxing library focused on ultra-low-latency VM function calls and a small attack surface. It includes a CLI emulator with GDB remote debugging and supports guest programs compiled from C, C++, Rust, and other languages to RISC-V ELF binaries.

Use cases

• sandbox untrusted scripts inside a game engine
• run user-generated mods in full isolation
• embed a fast scripting VM in a C++ application
• emulate RISC-V binaries with low overhead
• debug RISC-V guest programs via GDB
• run compute-heavy guest code with binary translation
• sandbox GDScript-like mods in Godot via SafeGDScript

When to choose

• you need nanosecond-scale VM call latency for game scripts or modding
• you want a zero-dependency, small-footprint embeddable sandbox
• you need a secure isolation boundary for untrusted guest code
• you want to run RISC-V ELF binaries across platforms without recompiling the sandbox

When to avoid

• you need full-system emulation including the OS kernel
• you need emulation of architectures other than RISC-V
• you need a mature multi-language host API beyond C/C++
• you want a managed or interpreted-language sandbox like WASM or Lua

Facets

library · maturity active

simulation security developer-tools interpreter developer-tools security simulation cpp cross-platform windows embedded riscv emulator sandboxing virtual-machine low-latency binary-translation game-scripting modding no-dependencies game-development linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="libriscv/libriscv")