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rust-lang/miri

An interpreter for Rust's mid-level intermediate representation that detects Undefined Behavior, memory leaks, and data races in Rust programs.

Core Features

Detects various Undefined Behaviors (e.g., out-of-bounds, use-after-free, uninitialized data).

Identifies memory leaks at the end of program execution.

Supports cross-interpretation for different target architectures (e.g., endianness).

Detects data races and emulates some weak memory effects.

Provides deterministic execution and isolation from the host system by default.

Quick Start

cargo miri test

Detailed Introduction

Miri is a crucial developer tool for Rust, functioning as an interpreter for the language's mid-level intermediate representation. Its core mission is to identify Undefined Behavior (UB) in Rust programs, which can lead to severe security flaws and crashes. By executing binaries and test suites, Miri uncovers issues such as memory safety violations, data races, and memory leaks. It also facilitates cross-interpretation, enabling developers to validate code behavior across diverse target systems. Although not a formal verifier, Miri significantly boosts the reliability and robustness of Rust applications by catching elusive bugs.