Triggers

Write a small program that executes when a debugger event occurs.

The trigger command

The trigger command defines a list of commands that execute when a specific event is triggered (e.g., hitting a breakpoint or watchpoint).

Available subcommands: trigger any - defines a list of commands that execute when any breakpoint or watchpoint is hit trigger - defines a list of commands that execute when a previously set breakpoint or watchpoint is hit trigger b <number> - defines a list of commands that execute when the specified breakpoint (by number) is hit trigger w <number> - defines a list of commands that execute when the specified watchpoint (by number) is hit trigger info - displays the list of active triggers

Usage example

Consider the following Rust program:

fn print_val(val: u32) {
    println!("val is {val}");
}

fn main() {
    let mut some_val = 3;
    some_val += 1;

    print_val(1337);
}

Now, let’s configure the debugger to show a backtrace when a breakpoint or watchpoint is hit: