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[wasm] Revert back to eval in wasm InvokeJS with modularization support . #61212

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merged 3 commits into from
Nov 5, 2021
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[wasm] Revert back to eval in wasm InvokeJS with modularization support . #61212

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c952f06
Revert back to eval in wasm InvokeJS with modularization support .
maraf Nov 4, 2021
f12a11a
Add test for JS expression returning an "undefined".
maraf Nov 4, 2021
6cb4266
Drop test for result type after calling toString.
maraf Nov 5, 2021
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28 changes: 28 additions & 0 deletions ...nteropServices.JavaScript/tests/System/Runtime/InteropServices/JavaScript/MarshalTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -871,5 +871,33 @@ public static void InternedStringReturnValuesWork()
Assert.Equal("s: 1 length: 1", HelperMarshal._stringResource);
Assert.Equal("1", HelperMarshal._stringResource2);
}

[Fact]
public static void InvokeJSExpression()
{
var result = Runtime.InvokeJS(@"1 + 2");
Assert.Equal("3", result);
}

[Fact]
public static void InvokeJSNullExpression()
{
var result = Runtime.InvokeJS(@"null");
Assert.Null(result);
}

[Fact]
public static void InvokeJSUndefinedExpression()
{
var result = Runtime.InvokeJS(@"undefined");
Assert.Null(result);
}

[Fact]
public static void InvokeJSNotInGlobalScope()
{
var result = Runtime.InvokeJS(@"var test_local_variable_name = 5; globalThis.test_local_variable_name");
Assert.Null(result);
}
}
}
15 changes: 6 additions & 9 deletions src/mono/wasm/runtime/method-calls.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -541,21 +541,18 @@ export function mono_wasm_invoke_js(code: MonoString, is_exception: Int32Ptr): M
if (code === MonoStringNull)
return MonoStringNull;

const js_code = conv_string(code);
const js_code = conv_string(code)!;

try {
const closure = {
Module, MONO, BINDING, INTERNAL
const closedEval = function (Module: EmscriptenModule, MONO: any, BINDING: any, INTERNAL: any, code: string) {
return eval(code);
};
const fn_body_template = `const {Module, MONO, BINDING, INTERNAL} = __closure; const __fn = function(){ ${js_code} }; return __fn.call(__closure);`;
const fn_defn = new Function("__closure", fn_body_template);
const res = fn_defn(closure);
const res = closedEval(Module, MONO, BINDING, INTERNAL, js_code);
Module.setValue(is_exception, 0, "i32");
if (typeof res === "undefined" || res === null)
return MonoStringNull;
if (typeof res !== "string")
return wrap_error(is_exception, `Return type of InvokeJS is string. Can't marshal response of type ${typeof res}.`);
return js_string_to_mono_string(res);

return js_string_to_mono_string(res.toString());
} catch (ex) {
return wrap_error(is_exception, ex);
}
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