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PR-URL: https://github.com/nodejs/node/pull/47251 Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com> Reviewed-By: Richard Lau <rlau@redhat.com>
49 lines
1.9 KiB
JavaScript
49 lines
1.9 KiB
JavaScript
// Copyright 2023 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-stringref --allow-natives-syntax
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d8.file.execute('test/mjsunit/wasm/wasm-module-builder.js');
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let builder = new WasmModuleBuilder();
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let sig_w_w = makeSig([kWasmStringRef], [kWasmStringRef]);
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let toLowerCase = builder.addImport("m", "toLowerCase", sig_w_w);
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builder.addFunction('call_tolower', sig_w_w).exportFunc().addBody([
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kExprLocalGet, 0,
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kExprCallFunction, toLowerCase,
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]);
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let module = builder.toModule();
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let recognizable = Function.prototype.call.bind(String.prototype.toLowerCase);
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let recognizable_imports = { m: { toLowerCase: recognizable } };
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let instance1 = new WebAssembly.Instance(module, recognizable_imports);
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let call_tolower = instance1.exports.call_tolower;
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assertEquals("abc", call_tolower("ABC"));
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%WasmTierUpFunction(call_tolower);
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assertEquals("abc", call_tolower("ABC"));
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// Null should be handled correctly (by throwing the same TypeError that
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// JavaScript would throw).
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assertThrows(
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() => call_tolower(null), TypeError,
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/String.prototype.toLowerCase called on null or undefined/);
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// Creating a second instance with identical imports should not cause
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// recompilation.
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console.log("Second instance.");
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let instance2 = new WebAssembly.Instance(module, recognizable_imports);
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assertEquals("def", instance2.exports.call_tolower("DEF"));
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// Creating a third instance with different imports must not reuse the
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// existing optimized code.
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console.log("Third instance.");
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let other_imports = { m: { toLowerCase: () => "foo" } };
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let instance3 = new WebAssembly.Instance(module, other_imports);
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assertEquals("foo", instance3.exports.call_tolower("GHI"));
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assertEquals("def", instance2.exports.call_tolower("DEF"));
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assertEquals("abc", instance1.exports.call_tolower("ABC"));
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