Function nix::sys::ptrace::step

pub fn step<T: Into<Option<Signal>>>(pid: Pid, sig: T) -> Result<()>

Available on crate feature ptrace only.

Move the stopped tracee process forward by a single step as with ptrace(PTRACE_SINGLESTEP, ...)

Advances the execution of the process with PID pid by a single step optionally delivering a signal specified by sig.

Example

use nix::sys::ptrace::step;
use nix::unistd::Pid;
use nix::sys::signal::Signal;
use nix::sys::wait::*;

// If a process changes state to the stopped state because of a SIGUSR1
// signal, this will step the process forward and forward the user
// signal to the stopped process
match waitpid(Pid::from_raw(-1), None) {
    Ok(WaitStatus::Stopped(pid, Signal::SIGUSR1)) => {
        let _ = step(pid, Signal::SIGUSR1);
    }
    _ => {},
}