Function dump_frame_from_ref

crates/stdlib/src/faulthandler.rs:328–344

(fd: i32, frame: &crate::vm::Py<Frame>)

    /// Write a frame's info to an fd using signal-safe I/O.
    #[cfg(any(unix, windows))]
    fn dump_frame_from_ref(fd: i32, frame: &crate::vm::Py<Frame>) {
        let funcname = frame.code.obj_name.as_str();
        let filename = frame.code.source_path().as_str();
        let lineno = if frame.lasti() == 0 {
            frame.code.first_line_number.map(|n| n.get()).unwrap_or(1) as u32
        } else {
            frame.current_location().line.get() as u32
        };

        puts(fd, "  File \"");
        dump_ascii(fd, filename);
        puts(fd, "\", line ");
        dump_decimal(fd, lineno as usize);
        puts(fd, " in ");
        dump_ascii(fd, funcname);
        puts(fd, "\n");
    }

    /// Dump traceback for a thread given its frame stack (for cross-thread dumping).
    /// # Safety