Function std::panic::always_abort
source · pub fn always_abort()
panic_always_abort
#84438)Expand description
Make all future panics abort directly without running the panic hook or unwinding.
There is no way to undo this; the effect lasts until the process exits or execs (or the equivalent).
§Use after fork
This function is particularly useful for calling after libc::fork
. After fork
, in a
multithreaded program it is (on many platforms) not safe to call the allocator. It is also
generally highly undesirable for an unwind to unwind past the fork
, because that results in
the unwind propagating to code that was only ever expecting to run in the parent.
panic::always_abort()
helps avoid both of these. It directly avoids any further unwinding,
and if there is a panic, the abort will occur without allocating provided that the arguments to
panic can be formatted without allocating.
Examples
#![feature(panic_always_abort)]
use std::panic;
panic::always_abort();
let _ = panic::catch_unwind(|| {
panic!("inside the catch");
});
// We will have aborted already, due to the panic.
unreachable!();
Run