tor-browser

throw-ref.js (1411B)

---

wasmFailValidateText(`(module
 (func
   throw_ref
 )
)`, /popping value from empty stack/);

wasmValidateText(`(module
 (func (param exnref)
   local.get 0
   throw_ref
 )
)`);

// Can rethrow a value
{
 let {test} = wasmEvalText(`(module
   (tag $a)
   (func (export "test")
     (block (result (ref exn))
       try_table (catch_all_ref 0)
         throw $a
       end
       unreachable
     )
     throw_ref
   )
 )`).exports;

 assertErrorMessage(test, WebAssembly.Exception, /.*/);
}

// Rethrowing a value inside a try works
{
 let {test} = wasmEvalText(`(module
   (tag $E)
   (func (export "test") (param $shouldRethrow i32) (result i32)
     (local $e exnref)
     (block $catch (result (ref exn))
       (try_table (catch_ref $E $catch) (throw $E))
       unreachable
     )
     (local.set $e)
     (block $catch (result (ref exn))
       (try_table (result i32) (catch_ref $E $catch)
         (if (i32.eqz (local.get $shouldRethrow))
           (then (throw_ref (local.get $e)))
         )
         (i32.const 2)
       )
       (return)
     )
     (drop) (i32.const 1)
   )
 )`).exports;
 assertEq(test(0), 1);
 assertEq(test(1), 2);
}

// Traps on null
{
 let {test} = wasmEvalText(`(module
   (tag $a)
   (func (export "test")
     ref.null exn
     throw_ref
   )
 )`).exports;

 assertErrorMessage(test, WebAssembly.RuntimeError, /null/);
}