Current availability of the 'Runtime' module

Using Swift
,
1

SE-419 introduced the 'Runtime' module, which has some nice-looking utilities for reading the loaded image info for a process. i tried to use it recently and couldn't quite figure out when & where it is/is not available. i found this in the changelog:

* [SE-0419][]:
  Introduced the new `Runtime` module, which contains a public API that can
  generate backtraces, presently supported on macOS and Linux.  Capturing a
  backtrace is as simple as

  ```swift
  import Runtime

  func foo() {
    // Without symbols
    let backtrace = try! Backtrace.capture()

    print(backtrace)

    // With symbol lookup
    let symbolicated = backtrace.symbolicated()!

    print(symbolicated)
  }

as advertised, it does seem to work on macOS (26) and Linux. i tried to use some of these API on iOS but the module appeared to be unavailable even in the latest iOS SDK. is that expected? if so, is it anticipated that this could/will be available on iOS at some point?

2

The header on the proposal says:

Implementation: Implemented on main, requires explicit _Backtracing import.

So I think it's not yet released; If you want to try you need to use recent toolchain snapshots and add import _Backtracing as indicated.

3

yes, that is true, however i suspect the post header is out of date. as this example demonstrates, import Runtime appears to work fine with the 6.2 compiler/stdlib (on Linux anyway), and attempting to import _Backtracing results in a compiler error.