入门

将以下内容添加到您的 Cargo.toml。

[dependencies]
compiler-interrupts = "1.0"

在您的程序中注册编译器中断处理程序。

#![feature(thread_local)]

#[thread_local]
#[allow(non_upper_case_globals)]
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")
    }
    println!(
        "CI @ {}: last interval = {} IR",
        std::thread::current().name().expect("invalid thread name"),
        interval
    );
}

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?")
}