1 files changed, 35 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/wasm/origin-trial-flags.js b/deps/v8/test/mjsunit/wasm/origin-trial-flags.js
new file mode 100644
index 00000000000..d41f581e134
--- /dev/null
+++ b/deps/v8/test/mjsunit/wasm/origin-trial-flags.js
@@ -0,0 +1,35 @@
+// Copyright 2017 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: --noexperimental-wasm-threads --allow-natives-syntax
+
+load("test/mjsunit/wasm/wasm-constants.js");
+load("test/mjsunit/wasm/wasm-module-builder.js");
+
+function instantiateModuleWithThreads() {
+  // Build a WebAssembly module which uses threads-features.
+  const builder = new WasmModuleBuilder();
+  const shared = true;
+  builder.addMemory(2, 10, false, shared);
+  builder.addFunction('main', kSig_i_ii)
+      .addBody([
+        kExprGetLocal, 0, kExprGetLocal, 1, kAtomicPrefix, kExprI32AtomicAdd, 2,
+        0
+      ])
+      .exportFunc();
+
+  return builder.instantiate();
+}
+
+// Disable WebAssembly threads initially.
+%SetWasmThreadsEnabled(false);
+assertThrows(instantiateModuleWithThreads, WebAssembly.CompileError);
+
+// Enable WebAssembly threads.
+%SetWasmThreadsEnabled(true);
+assertInstanceof(instantiateModuleWithThreads(), WebAssembly.Instance);
+
+// Disable WebAssembly threads.
+%SetWasmThreadsEnabled(false);
+assertThrows(instantiateModuleWithThreads, WebAssembly.CompileError);