// Copyright 2016 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Flags: --expose-wasm load("test/mjsunit/wasm/wasm-module-builder.js"); let module = (() => { let builder = new WasmModuleBuilder(); builder.addMemory(1, undefined, false); builder.addFunction("grow_memory", kSig_i_i) .addBody([kExprLocalGet, 0, kExprMemoryGrow, kMemoryZero]) .exportFunc(); builder.exportMemoryAs("memory"); return builder.toModule(); })(); (function TestDetachingViaAPI() { print("TestDetachingViaAPI..."); let memory = new WebAssembly.Memory({initial: 1, maximum: 100}); let growMem = (pages) => memory.grow(pages); let b1 = memory.buffer; assertEquals(kPageSize, b1.byteLength); growMem(0); let b2 = memory.buffer; assertFalse(b1 === b2); assertEquals(0, b1.byteLength); assertEquals(kPageSize, b2.byteLength); growMem(1); let b3 = memory.buffer; assertFalse(b1 === b3); assertFalse(b2 === b3); assertEquals(0, b1.byteLength); assertEquals(0, b2.byteLength); assertEquals(2 * kPageSize, b3.byteLength); })(); (function TestDetachingViaBytecode() { print("TestDetachingViaBytecode..."); let instance = new WebAssembly.Instance(module); let growMem = instance.exports.grow_memory; let memory = instance.exports.memory; let b1 = memory.buffer; assertEquals(kPageSize, b1.byteLength); growMem(0); let b2 = memory.buffer; assertFalse(b1 === b2); assertEquals(0, b1.byteLength); assertEquals(kPageSize, b2.byteLength); growMem(1); let b3 = memory.buffer; assertFalse(b1 === b3); assertFalse(b2 === b3); assertEquals(0, b1.byteLength); assertEquals(0, b2.byteLength); assertEquals(2 * kPageSize, b3.byteLength); })();