1 files changed, 47 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testIntern.cpp b/js/src/jsapi-tests/testIntern.cpp
new file mode 100644
index 0000000000..31fdb6b95b
--- /dev/null
+++ b/js/src/jsapi-tests/testIntern.cpp
@@ -0,0 +1,47 @@
+/* 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 "gc/FreeOp.h"
+#include "gc/Marking.h"
+#include "jsapi-tests/tests.h"
+#include "util/Text.h"
+#include "vm/JSAtom.h"
+#include "vm/StringType.h"
+
+BEGIN_TEST(testAtomizedIsNotPinned) {
+  /* Try to pick a string that won't be interned by other tests in this runtime.
+   */
+  static const char someChars[] = "blah blah blah? blah blah blah";
+  JS::Rooted<JSAtom*> atom(cx,
+                           js::Atomize(cx, someChars, js_strlen(someChars)));
+  CHECK(!JS_StringHasBeenPinned(cx, atom));
+  CHECK(JS_AtomizeAndPinJSString(cx, atom));
+  CHECK(JS_StringHasBeenPinned(cx, atom));
+  return true;
+}
+END_TEST(testAtomizedIsNotPinned)
+
+struct StringWrapperStruct {
+  JSString* str;
+  bool strOk;
+} sw;
+
+BEGIN_TEST(testPinAcrossGC) {
+  sw.str = JS_AtomizeAndPinString(
+      cx, "wrapped chars that another test shouldn't be using");
+  sw.strOk = false;
+  CHECK(sw.str);
+  JS_AddFinalizeCallback(cx, FinalizeCallback, nullptr);
+  JS_GC(cx);
+  CHECK(sw.strOk);
+  return true;
+}
+
+static void FinalizeCallback(JSFreeOp* fop, JSFinalizeStatus status,
+                             void* data) {
+  if (status == JSFINALIZE_GROUP_START) {
+    sw.strOk = js::gc::IsMarkedUnbarriered(fop->runtime(), &sw.str);
+  }
+}
+END_TEST(testPinAcrossGC)