1 files changed, 67 insertions, 0 deletions
diff --git a/js/src/gdb/tests/test-Root.cpp b/js/src/gdb/tests/test-Root.cpp
new file mode 100644
index 0000000000..f93beba88a
--- /dev/null
+++ b/js/src/gdb/tests/test-Root.cpp
@@ -0,0 +1,67 @@
+#include "gdb-tests.h"
+
+#include "jsapi.h"
+
+#include "gc/Barrier.h"
+#include "js/Array.h"  // JS::NewArrayObject
+#include "js/GlobalObject.h"
+#include "js/ValueArray.h"
+#include "vm/JSFunction.h"
+
+using namespace js;
+
+FRAGMENT(Root, null) {
+  JS::Rooted<JSObject*> null(cx, nullptr);
+
+  breakpoint();
+
+  use(null);
+}
+
+void callee(JS::Handle<JSObject*> obj,
+            JS::MutableHandle<JSObject*> mutableObj) {
+  // Prevent the linker from unifying this function with others that are
+  // equivalent in machine code but not type.
+  fprintf(stderr, "Called " __FILE__ ":callee\n");
+  breakpoint();
+}
+
+FRAGMENT(Root, handle) {
+  JS::Rooted<JSObject*> global(cx, JS::CurrentGlobalOrNull(cx));
+  callee(global, &global);
+  use(global);
+}
+
+FRAGMENT(Root, HeapSlot) {
+  JS::Rooted<JS::Value> plinth(
+      cx, JS::StringValue(JS_NewStringCopyZ(cx, "plinth")));
+  JS::Rooted<JSObject*> array(
+      cx, JS::NewArrayObject(cx, JS::HandleValueArray(plinth)));
+
+  breakpoint();
+
+  use(plinth);
+  use(array);
+}
+
+FRAGMENT(Root, barriers) {
+  JSObject* obj = JS_NewPlainObject(cx);
+  PreBarriered<JSObject*> prebarriered(obj);
+  GCPtr<JSObject*> heapptr(obj);
+  HeapPtr<JSObject*> relocatable(obj);
+
+  JS::Value val = JS::ObjectValue(*obj);
+  PreBarriered<JS::Value> prebarrieredValue(JS::ObjectValue(*obj));
+  GCPtr<JS::Value> heapValue(JS::ObjectValue(*obj));
+  HeapPtr<JS::Value> relocatableValue(JS::ObjectValue(*obj));
+
+  breakpoint();
+
+  use(prebarriered);
+  use(heapptr);
+  use(relocatable);
+  use(val);
+  use(prebarrieredValue);
+  use(heapValue);
+  use(relocatableValue);
+}