[−][src]Macro probe::probe
Define a static probe point.
This annotates a code location with a name and arguments, and compiles in metadata to let debugging tools locate it.
Arguments
-
provider
- An identifier for naming probe groups. -
name
- An identifier for this specific probe. -
arg
... - Optional data to provide with the probe. Any expression which can be castas i64
is allowed as an argument. The arguments might not be evaluated at all when a debugger is not attached to the probe, depending on the platform implementation, so don't rely on side effects.
Example
#![feature(asm)] use probe::probe; fn main() { probe!(foo, main); let x = 42; probe!(foo, show_x, x); let y = Some(x); probe!(foo, show_y, match y { Some(n) => n, None => -1 }); }