[wasm] Master CL for Binary 0xC changes.

test/mjsunit/wasm/instance-gc.js

Index: test/mjsunit/wasm/instance-gc.js
diff --git a/test/mjsunit/wasm/instance-gc.js b/test/mjsunit/wasm/instance-gc.js
new file mode 100644
index 0000000000000000000000000000000000000000..1713f27b99af2eec16480445d0cc89a09fb264d2
--- /dev/null
+++ b/test/mjsunit/wasm/instance-gc.js
@@ -0,0 +1,122 @@
+// 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 --expose-gc
+
+load("test/mjsunit/wasm/wasm-constants.js");
+load("test/mjsunit/wasm/wasm-module-builder.js");
+
+let nogc = () => {};
+
+function newModule() {
+  let builder = new WasmModuleBuilder();
+  builder.addMemory(1, 1, true);
+  builder.addFunction("main", kSig_i)
+    .addBody([kExprI32Const, 0, kExprI32LoadMem, 0, 0])
+    .exportFunc();
+
+  return new WebAssembly.Module(builder.toBuffer());
+}
+
+function newInstance(module, val) {
+  var instance = new WebAssembly.Instance(module);
+  var view = new Int32Array(instance.exports.memory.buffer);
+  view[0] = val;
+  return instance;
+}
+
+function TestSingleLiveInstance(gc) {
+  let module = newModule();
+
+  print("TestSingleLiveInstance...");
+  for (var i = 0; i < 5; i++) {
+    (() => {  // don't leak references between iterations.
+      print(" [" + i + "]...");
+      gc();
+      var instance = newInstance(module, i + 99);
+      assertEquals(i + 99, instance.exports.main());
+    })();
+  }
+}
+
+TestSingleLiveInstance(nogc);
+TestSingleLiveInstance(gc);
+
+function TestMultiInstance(gc) {
+  let module = newModule();
+
+  print("TestMultiInstance...");
+  // Note: compute the root instances in another function to be
+  // sure that {roots} really is the only set of roots to the instances.
+  let roots = (() => { return [
+    newInstance(module, 33),
+    newInstance(module, 4444),
+    newInstance(module, 555555)
+  ];})();
+
+  (() => { // don't leak references!
+    print(" [0]...");
+    gc();
+    assertEquals(33, roots[0].exports.main());
+    roots[0] = null;
+  })();
+
+  (() => { // don't leak references!
+    print(" [1]...");
+    gc();
+    assertEquals(4444, roots[1].exports.main());
+    roots[1] = null;
+  })();
+
+  (() => { // don't leak references!
+    print(" [2]...");
+    gc();
+    assertEquals(555555, roots[2].exports.main());
+    roots[2] = null;
+  })();
+}
+
+TestMultiInstance(nogc);
+TestMultiInstance(gc);
+
+function TestReclaimingCompiledModule() {
+  let module = newModule();
+
+  print("TestReclaimingCompiledModule...");
+  let roots = (() => { return [
+    newInstance(module, 7777),
+    newInstance(module, 8888),
+  ];})();
+
+  (() => { // don't leak references!
+    print(" [0]...");
+    assertEquals(7777, roots[0].exports.main());
+    assertEquals(8888, roots[1].exports.main());
+    roots[1] = null;
+  })();
+
+  (() => { // don't leak references!
+    print(" [1]...");
+    gc();
+    roots[1] = newInstance(module, 9999);
+    assertEquals(7777, roots[0].exports.main());
+    assertEquals(9999, roots[1].exports.main());
+    roots[0] = null;
+    roots[1] = null;
+  })();
+
+  (() => { // don't leak references!
+    print(" [2]...");
+    gc();
+    roots[0] = newInstance(module, 11111);
+    roots[1] = newInstance(module, 22222);
+    assertEquals(11111, roots[0].exports.main());
+    assertEquals(22222, roots[1].exports.main());
+    roots[0] = null;
+    roots[1] = null;
+  })();
+}
+
+TestReclaimingCompiledModule(nogc);
+TestReclaimingCompiledModule(gc);