[wasm] make WebAssembly.Instance require a WebAssembly.Memory

test/mjsunit/wasm/instantiate-module-basic.js

 // Copyright 2015 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 kReturnValue = 117;
@@ skipping 123 matching lines @@
   // writer(mem[i]);
   // return mem[i] + some_value();
   builder.addFunction("_wrap_writer", signature)
     .addBody([
       kExprGetLocal, 0,
       kExprCallFunction, 1]);
   builder.appendToTable([2, 3]);
 
 
   var module = new WebAssembly.Module(builder.toBuffer());
-  var mem_1 = new ArrayBuffer(4);
-  var mem_2 = new ArrayBuffer(4);
-  var view_1 = new Int32Array(mem_1);
-  var view_2 = new Int32Array(mem_2);
+  var mem_1 = new WebAssembly.Memory({initial: 1});
+  var mem_2 = new WebAssembly.Memory({initial: 1});
+  var view_1 = new Int32Array(mem_1.buffer);
+  var view_2 = new Int32Array(mem_2.buffer);
 
   view_1[0] = 42;
   view_2[0] = 1000;
 
   var outval_1;
   var outval_2;
   var i1 = new WebAssembly.Instance(module, {some_value: () => 1,
                                     writer: (x)=>outval_1 = x }, mem_1);
   var i2 = new WebAssembly.Instance(module, {some_value: () => 2,
                                     writer: (x)=>outval_2 = x }, mem_2);
@@ skipping 34 matching lines @@
   print("InstanceMemoryIsIsolated...");
   var builder = new WasmModuleBuilder();
   builder.addMemory(1,1, true);
 
   builder.addFunction("f", kSig_i_v)
     .addBody([
       kExprI32Const, 0,
       kExprI32LoadMem, 0, 0
     ]).exportFunc();
 
-  var mem_1 = new ArrayBuffer(65536);
-  var mem_2 = new ArrayBuffer(65536);
-  var view_1 = new Int32Array(mem_1);
-  var view_2 = new Int32Array(mem_2);
+  var mem_1 = new WebAssembly.Memory({initial: 1});
+  var mem_2 = new WebAssembly.Memory({initial: 1});
+  var view_1 = new Int32Array(mem_1.buffer);
+  var view_2 = new Int32Array(mem_2.buffer);
   view_1[0] = 1;
   view_2[0] = 1000;
 
   var module = new WebAssembly.Module(builder.toBuffer());
   var i1 = new WebAssembly.Instance(module, null, mem_1);
   var i2 = new WebAssembly.Instance(module, null, mem_2);
 
   assertEquals(1, i1.exports.f());
   assertEquals(1000, i2.exports.f());
 })();
+
+(function MustBeMemory() {
+  var memory = new ArrayBuffer(65536);
+  var module = new WebAssembly.Module(buffer);
+  assertThrows(() => new WebAssembly.Instance(module, null, memory), TypeError);
+})();