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deps/v8/test/mjsunit/shared-memory/wasm/regress-406662636.js

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+// Copyright 2025 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: --verify-heap --shared-heap
+
+d8.file.execute('test/mjsunit/wasm/wasm-module-builder.js');
+
+(function() {
+  let num_pages = 64 * 1024 * 1024 / kPageSize;
+  let builder = new WasmModuleBuilder();
+  builder.addMemory64(num_pages, num_pages);
+  builder.exportMemoryAs('memory');
+
+  let module = builder.instantiate();
+  let memory = module.exports.memory;
+  new Int8Array(memory.buffer);
+})();
+
+function InstantiatingWorkerCode() {
+  function workerAssert(condition, message) {
+    if (!condition) postMessage(`Check failed: ${message}`);
+  }
+
+  onmessage = function({data:[mem, module]}) {
+    workerAssert(mem instanceof WebAssembly.Memory, 'Wasm memory');
+    workerAssert(mem.buffer instanceof SharedArrayBuffer, 'SAB');
+    try {
+      new WebAssembly.Instance(module, {imp: {mem: mem}});
+      postMessage('Instantiation succeeded');
+    } catch (e) {
+      postMessage(`Exception: ${e}`);
+    }
+  };
+}
+
+(function TestImportMemory64AsMemory32InWorker() {
+  print(arguments.callee.name);
+  const builder1 = new WasmModuleBuilder();
+  builder1.addMemory64(1, 1, /* shared */ true);
+  builder1.exportMemoryAs('mem64');
+  const instance1 = builder1.instantiate();
+  const {mem64} = instance1.exports;
+
+  let builder2 = new WasmModuleBuilder();
+  builder2.addImportedMemory('imp', 'mem');
+  let module2 = builder2.toModule();
+
+  let worker = new Worker(InstantiatingWorkerCode, {type: 'function'});
+  worker.postMessage([mem64, module2]);
+})();
+
+(function TestImportMemory32AsMemory64InWorker() {
+  print(arguments.callee.name);
+  const builder1 = new WasmModuleBuilder();
+  builder1.addMemory(1, 1, /* shared */ true);
+  builder1.exportMemoryAs('mem32');
+  const instance1 = builder1.instantiate();
+  const {mem32} = instance1.exports;
+
+  let builder2 = new WasmModuleBuilder();
+  builder2.addImportedMemory(
+      'imp', 'mem', 1, 1, /* shared */ false, /* memory64 */ true);
+  let module2 = builder2.toModule();
+
+  let worker = new Worker(InstantiatingWorkerCode, {type: 'function'});
+  worker.postMessage([mem32, module2]);
+})();