Function __cranelift_throw

cranelift/filetests/src/function_runner.rs:631–681

(
    entry_fp: usize,
    exit_fp: usize,
    exit_pc: usize,
    tag: u32,
    payload1: usize,
    payload2: usize,
)

    target_arch = "riscv64"
))]
extern "C-unwind" fn __cranelift_throw(
    entry_fp: usize,
    exit_fp: usize,
    exit_pc: usize,
    tag: u32,
    payload1: usize,
    payload2: usize,
) -> ! {
    let compiled_test_file = unsafe { &*COMPILED_TEST_FILE.get() };
    let unwind_host = wasmtime_unwinder::UnwindHost;
    let frame_handler = |frame: &wasmtime_unwinder::Frame| -> Option<(usize, usize)> {
        let (base, table) = compiled_test_file
            .module
            .as_ref()
            .unwrap()
            .lookup_wasmtime_exception_data(frame.pc())?;
        let relative_pc = u32::try_from(
            frame
                .pc()
                .checked_sub(base)
                .expect("module lookup did not return a module base below the PC"),
        )
        .expect("module larger than 4GiB");

        table
            .lookup_pc_tag(relative_pc, tag)
            .map(|(frame_offset, handler)| {
                let handler_sp = frame
                    .fp()
                    .wrapping_sub(usize::try_from(frame_offset).unwrap());
                let handler_pc = base
                    .checked_add(usize::try_from(handler).unwrap())
                    .expect("Handler address computation overflowed");
                (handler_pc, handler_sp)
            })
    };
    unsafe {
        match wasmtime_unwinder::Handler::find(
            &unwind_host,
            frame_handler,
            exit_pc,
            exit_fp,
            entry_fp,
        ) {
            Some(handler) => handler.resume_tailcc(payload1, payload2),
            None => {
                panic!("Expected a handler to exit for throw of tag {tag} at pc {exit_pc:x}");
            }
        }
    }
}

#[cfg(not(any(
    target_arch = "x86_64",