1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/vm/Value.cpp b/js/src/vm/Value.cpp
new file mode 100644
index 0000000000..94f5f86731
--- /dev/null
+++ b/js/src/vm/Value.cpp
@@ -0,0 +1,41 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "js/Value.h"
+
+#include "mozilla/Assertions.h"
+
+#include <inttypes.h>
+
+static const JS::Value JSVAL_NULL =
+    JS::Value::fromTagAndPayload(JSVAL_TAG_NULL, 0);
+static const JS::Value JSVAL_FALSE =
+    JS::Value::fromTagAndPayload(JSVAL_TAG_BOOLEAN, false);
+static const JS::Value JSVAL_TRUE =
+    JS::Value::fromTagAndPayload(JSVAL_TAG_BOOLEAN, true);
+static const JS::Value JSVAL_VOID =
+    JS::Value::fromTagAndPayload(JSVAL_TAG_UNDEFINED, 0);
+static const mozilla::Maybe<JS::Value> JSVAL_NOTHING;
+
+namespace JS {
+
+const HandleValue NullHandleValue =
+    HandleValue::fromMarkedLocation(&JSVAL_NULL);
+const HandleValue UndefinedHandleValue =
+    HandleValue::fromMarkedLocation(&JSVAL_VOID);
+const HandleValue TrueHandleValue =
+    HandleValue::fromMarkedLocation(&JSVAL_TRUE);
+const HandleValue FalseHandleValue =
+    HandleValue::fromMarkedLocation(&JSVAL_FALSE);
+const Handle<mozilla::Maybe<Value>> NothingHandleValue =
+    Handle<mozilla::Maybe<Value>>::fromMarkedLocation(&JSVAL_NOTHING);
+
+}  // namespace JS
+
+void js::ReportBadValueTypeAndCrash(const JS::Value& value) {
+  MOZ_CRASH_UNSAFE_PRINTF("JS::Value has illegal type: 0x%" PRIx64,
+                          value.asRawBits());
+}