66 lines
1.8 KiB
JavaScript
66 lines
1.8 KiB
JavaScript
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// Copyright 2016 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: --expose-wasm
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load("test/mjsunit/wasm/wasm-constants.js");
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load("test/mjsunit/wasm/wasm-module-builder.js");
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let module = (() => {
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let builder = new WasmModuleBuilder();
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builder.addMemory(1, kV8MaxPages, false);
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builder.addFunction("grow_memory", kSig_i_i)
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.addBody([kExprGetLocal, 0, kExprGrowMemory, kMemoryZero])
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.exportFunc();
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builder.exportMemoryAs("memory");
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return builder.toModule();
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})();
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(function TestDetachingViaAPI() {
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print("TestDetachingViaAPI...");
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let memory = new WebAssembly.Memory({initial: 1, maximum: 100});
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let growMem = (pages) => memory.grow(pages);
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let b1 = memory.buffer;
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assertEquals(kPageSize, b1.byteLength);
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growMem(0);
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let b2 = memory.buffer;
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assertFalse(b1 === b2);
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assertEquals(0, b1.byteLength);
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assertEquals(kPageSize, b2.byteLength);
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growMem(1);
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let b3 = memory.buffer;
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assertFalse(b1 === b3);
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assertFalse(b2 === b3);
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assertEquals(0, b1.byteLength);
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assertEquals(0, b2.byteLength);
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assertEquals(2 * kPageSize, b3.byteLength);
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})();
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(function TestDetachingViaBytecode() {
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print("TestDetachingViaBytecode...");
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let instance = new WebAssembly.Instance(module);
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let growMem = instance.exports.grow_memory;
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let memory = instance.exports.memory;
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let b1 = memory.buffer;
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assertEquals(kPageSize, b1.byteLength);
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growMem(0);
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let b2 = memory.buffer;
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assertFalse(b1 === b2);
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assertEquals(0, b1.byteLength);
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assertEquals(kPageSize, b2.byteLength);
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growMem(1);
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let b3 = memory.buffer;
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assertFalse(b1 === b3);
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assertFalse(b2 === b3);
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assertEquals(0, b1.byteLength);
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assertEquals(0, b2.byteLength);
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assertEquals(2 * kPageSize, b3.byteLength);
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})();
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