[wasm] Add test for printing wasm code after deserialization

R=mstarzinger@chromium.org

Bug: chromium:849656
Change-Id: I4c1990e10905969c94913f434ec0013e5cbbfb19
Reviewed-on: https://chromium-review.googlesource.com/1087273Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53535}

test/mjsunit/wasm/print-code.js

+// Copyright 2018 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: --allow-natives-syntax --print-wasm-code
+
+// Just test that printing the code of the following wasm modules does not
+// crash.
+
+load('test/mjsunit/wasm/wasm-constants.js');
+load('test/mjsunit/wasm/wasm-module-builder.js');
+
+(function print_deserialized_code() {
+  // https://crbug.com/849656
+  print(arguments.callee.name);
+  var builder = new WasmModuleBuilder();
+  builder.addImport('', 'imp', kSig_i_v);
+
+  builder.addFunction('main', kSig_i_v)
+      .addBody([
+        kExprCallFunction,
+        0,
+      ])
+      .exportFunc();
+
+  var wire_bytes = builder.toBuffer();
+  var module = new WebAssembly.Module(wire_bytes);
+  print('serializing');
+  var buff = %SerializeWasmModule(module);
+  print('deserializing');
+  module = %DeserializeWasmModule(buff, wire_bytes);
+})();