#interrupt #compiler #llvm-ir #api #thread-local

nightly compiler-interrupts

Compiler Interrupts API for Rust

2 stable releases

1.0.1 Jul 31, 2021
1.0.0 Jul 24, 2021

#1608 in Development tools

22 downloads per month

MIT license

95 lines


crates.io docs.rs license

compiler-interrupts provides Rust API for the Compiler Interrupts library. Check out the Compiler Interrupts main repository for more info.


  • Rust 1.45.0 or later is required. Due to the usage of #[thread_local] unstable feature, this package currently requires nightly Rust.

Getting started

Add this to your Cargo.toml.

compiler-interrupts = "1.0"

Register the Compiler Interrupts handler in your program.


static mut prev_ic: i64 = 0;

fn interrupt_handler(ic: i64) {
    let interval;
    unsafe {
        // save the last interval
        interval = ic - prev_ic;

        // update the instruction count
        prev_ic = ic;
    if interval < 0 {
        panic!("IR interval was negative")
        "CI @ {}: last interval = {} IR",
        std::thread::current().name().expect("invalid thread name"),

fn main() {
    // register the CI handler for 1000 IR and cycles interval
    unsafe {
        compiler_interrupts::register(1000, 1000, interrupt_handler);

    // do something compute-intensive
    for _ in 0..100 {}

    println!("i can add an unsafe block, right?")

If you have cargo-compiler-interrupts installed, you can now run cargo build-ci to start the compilation and integration. Check out the documentation for more info about the API.


All issue reports, feature requests, pull requests and GitHub stars are welcomed and much appreciated.


Quan Tran (@quanshousio)



compiler-interrupts is available under the MIT license. See the LICENSE file for more info.

No runtime deps