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BrainBacon • 11/20/2024 • 2 replies • view on HN

Thanks, yeah I considered using the instructions directly, but I was hoping for a more cross-platform option. For my purposes, developing in the Bevy engine, nightly isn't a huge blocker. Yeah, it would be really great to just have breakpoint support in stable Rust, thanks for doing the proposal! I'll consider stable support in the meantime.

Replies

nulld3v • 11/21/2024

On Unix platforms, you could just raise SIGTRAP directly, it will pause the attached debugger and works regardless of architecture.

This is the macro I use for example:

  #[doc(hidden)]
  pub use libc as __libc;
  
  // This is a macro instead of a function to ensure the debugger shows the breakpoint as being at
  // the caller instead of this file.
  #[cfg(unix)]
  #[macro_export]
  macro_rules! breakpoint {
      () => {
          unsafe {
              use $crate::__libc as libc;
              libc::raise(libc::SIGTRAP);
          }
      };
  }
amluto • 11/20/2024

Hah, the README says:

> Additonally, debugging may not land on the macro statements themselves.

See my comment above, and give int3;nop a try.

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