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// 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-constants.js");
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([kExprGetLocal, 0, kExprGrowMemory, 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);
})();
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