bc3b9332ac
Per https://github.com/WebAssembly/gc/issues/234, this implements "nominal" type definitions with explicit supertypes, and statically typed RTT-less instructions for allocation and testing/casting. This should be fully backwards compatible with existing Wasm modules. Spec: https://bit.ly/3cWcm6Q ("version 4") Bug: v8:7748 Change-Id: Id5a1399b368fdfad22036cfd66f1bef593e640f7 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3144916 Commit-Queue: Jakob Kummerow <jkummerow@chromium.org> Reviewed-by: Manos Koukoutos <manoskouk@chromium.org> Cr-Commit-Position: refs/heads/main@{#76844}
150 lines
5.7 KiB
JavaScript
150 lines
5.7 KiB
JavaScript
// Copyright 2021 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --experimental-wasm-gc
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d8.file.execute('test/mjsunit/wasm/wasm-module-builder.js');
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let instance = (() => {
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let builder = new WasmModuleBuilder();
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let struct = builder.addStruct([makeField(kWasmI32, true)]);
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let array = builder.addArray(kWasmF64, true);
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let sig = builder.addType(makeSig([kWasmI32], [kWasmI32]));
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let func = builder.addFunction('inc', sig)
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.addBody([kExprLocalGet, 0, kExprI32Const, 1, kExprI32Add])
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.exportAs('inc');
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builder.addFunction('struct_producer', makeSig([], [kWasmDataRef]))
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.addBody([
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kGCPrefix, kExprRttCanon, struct, kGCPrefix,
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kExprStructNewDefaultWithRtt, struct
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])
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.exportFunc();
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builder.addFunction('array_producer', makeSig([], [kWasmDataRef]))
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.addBody([
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kExprI32Const, 10, kGCPrefix, kExprRttCanon, array, kGCPrefix,
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kExprArrayNewDefaultWithRtt, array
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])
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.exportFunc();
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builder.addFunction('i31_producer', makeSig([], [kWasmI31Ref]))
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.addBody([kExprI32Const, 5, kGCPrefix, kExprI31New])
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.exportFunc();
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builder.addFunction('func_producer', makeSig([], [wasmRefType(sig)]))
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.addBody([kExprRefFunc, func.index])
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.exportFunc();
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let test_types = {
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i31: kWasmI31Ref,
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struct: kWasmDataRef,
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array: kWasmDataRef,
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raw_struct: struct,
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raw_array: array,
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typed_func: sig,
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data: kWasmDataRef,
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eq: kWasmEqRef,
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func: kWasmFuncRef,
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any: kWasmAnyRef,
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};
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for (key in test_types) {
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let type = wasmOptRefType(test_types[key]);
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builder.addFunction(key + '_id', makeSig([type], [type]))
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.addBody([kExprLocalGet, 0])
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.exportFunc();
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builder.addFunction(key + '_null', makeSig([], [type]))
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.addBody([kExprRefNull, ...wasmSignedLeb(test_types[key])])
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.exportFunc();
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}
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return builder.instantiate({});
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})();
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// Wasm-exposed null is the same as JS null.
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assertEquals(instance.exports.struct_null(), null);
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// We can roundtrip an i31.
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instance.exports.i31_id(instance.exports.i31_producer());
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// We can roundtrip any null as i31.
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instance.exports.i31_id(instance.exports.i31_null());
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instance.exports.i31_id(instance.exports.struct_null());
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// We cannot roundtrip a struct as i31.
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assertThrows(
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() => instance.exports.i31_id(instance.exports.struct_producer()),
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TypeError, 'type incompatibility when transforming from/to JS');
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// We can roundtrip a struct as dataref.
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instance.exports.data_id(instance.exports.struct_producer());
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// We can roundtrip an array as dataref.
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instance.exports.data_id(instance.exports.array_producer());
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// We can roundtrip any null as dataref.
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instance.exports.data_id(instance.exports.data_null());
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instance.exports.data_id(instance.exports.i31_null());
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// We cannot roundtrip an i31 as dataref.
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assertThrows(
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() => instance.exports.data_id(instance.exports.i31_producer()), TypeError,
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'type incompatibility when transforming from/to JS');
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// We can roundtrip a struct as eqref.
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instance.exports.eq_id(instance.exports.struct_producer());
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// We can roundtrip an array as eqref.
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instance.exports.eq_id(instance.exports.array_producer());
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// We can roundtrip an i31 as eqref.
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instance.exports.eq_id(instance.exports.i31_producer());
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// We can roundtrip any null as eqref.
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instance.exports.eq_id(instance.exports.data_null());
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instance.exports.eq_id(instance.exports.i31_null());
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instance.exports.eq_id(instance.exports.func_null());
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// We cannot roundtrip a func as eqref.
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assertThrows(
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() => instance.exports.eq_id(instance.exports.func_producer()), TypeError,
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'type incompatibility when transforming from/to JS');
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// We can roundtrip a struct as anyref.
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instance.exports.any_id(instance.exports.struct_producer());
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// We can roundtrip an array as anyref.
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instance.exports.any_id(instance.exports.array_producer());
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// We can roundtrip an i31 as anyref.
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instance.exports.any_id(instance.exports.i31_producer());
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// We can roundtrip a func as anyref.
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instance.exports.any_id(instance.exports.func_producer());
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// We can roundtrip any null as anyref.
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instance.exports.any_id(instance.exports.data_null());
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instance.exports.any_id(instance.exports.i31_null());
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instance.exports.any_id(instance.exports.func_null());
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// We can roundtrip a JS object as anyref.
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instance.exports.any_id(instance);
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// We can roundtrip a typed function.
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instance.exports.typed_func_id(instance.exports.func_producer());
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// We can roundtrip any null as typed funcion.
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instance.exports.typed_func_id(instance.exports.i31_null());
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instance.exports.typed_func_id(instance.exports.struct_null());
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// We cannot roundtrip a struct as typed funcion.
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assertThrows(
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() => instance.exports.typed_func_id(instance.exports.struct_producer()),
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TypeError, 'type incompatibility when transforming from/to JS');
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// We can roundtrip a func.
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instance.exports.func_id(instance.exports.func_producer());
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// We can roundtrip any null as func.
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instance.exports.func_id(instance.exports.i31_null());
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instance.exports.func_id(instance.exports.struct_null());
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// We cannot roundtrip an i31 as func.
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assertThrows(
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() => instance.exports.func_id(instance.exports.i31_producer()), TypeError,
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'type incompatibility when transforming from/to JS');
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// We cannot directly roundtrip structs or arrays.
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// TODO(7748): Switch these tests once we can.
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assertThrows(
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() => instance.exports.raw_struct_id(instance.exports.struct_producer()),
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TypeError, 'type incompatibility when transforming from/to JS');
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assertThrows(
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() => instance.exports.raw_array_id(instance.exports.array_producer()),
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TypeError, 'type incompatibility when transforming from/to JS');
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