go/src/internal/abi/escape.go

// NoEscape hides the pointer p from escape analysis, preventing it
// from escaping to the heap. It compiles down to nothing.
//
// WARNING: This is very subtle to use correctly. The caller must
// ensure that it's truly safe for p to not escape to the heap by
// maintaining runtime pointer invariants (for example, that globals
// and the heap may not generally point into a stack).
//
//go:nosplit
//go:nocheckptr
func NoEscape(p unsafe.Pointer) unsafe.Pointer { … }

var alwaysFalse …

var escapeSink …

// Escape forces any pointers in x to escape to the heap.
func Escape[T any](x T) T { … }