[stubs] Add option to allow LO space allocation

test/mjsunit/regress/regress-670671.js

+// 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.
+
+// Trigger an infinite loop through RegExp.prototype[@@match], which results
+// in unbounded growth of the results array.
+
+// Limit the number of iterations to avoid OOM while still triggering large
+// object space allocation.
+const min_ptr_size = 4;
+const max_regular_heap_object_size = 507136;
+const num_iterations = max_regular_heap_object_size / min_ptr_size;
+
+let i = 0;
+
+const re = /foo.bar/;
+const RegExpPrototypeExec = RegExp.prototype.exec;
+re.exec = (str) => {
+  return (i++ < num_iterations) ? RegExpPrototypeExec.call(re, str) : null;
+};
+re.__defineGetter__("global", () => true);  // Triggers infinite loop.
+
+"foo*bar".match(re);  // Should not crash.