1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testIntern.cpp b/js/src/jsapi-tests/testIntern.cpp
new file mode 100644
index 000000000..0bcc5fe0d
--- /dev/null
+++ b/js/src/jsapi-tests/testIntern.cpp
@@ -0,0 +1,48 @@
+/* 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 "jsatom.h"
+
+#include "gc/Marking.h"
+#include "jsapi-tests/tests.h"
+#include "vm/String.h"
+
+using mozilla::ArrayLength;
+
+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, ArrayLength(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, bool isZoneGC, void* data)
+{
+    if (status == JSFINALIZE_GROUP_START)
+        sw.strOk = js::gc::IsMarkedUnbarriered(fop->runtime(), &sw.str);
+}
+END_TEST(testPinAcrossGC)