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-rw-r--r--js/src/jsapi-tests/testAddPropertyPropcache.cpp67
1 files changed, 67 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testAddPropertyPropcache.cpp b/js/src/jsapi-tests/testAddPropertyPropcache.cpp
new file mode 100644
index 0000000000..7fa1e86df9
--- /dev/null
+++ b/js/src/jsapi-tests/testAddPropertyPropcache.cpp
@@ -0,0 +1,67 @@
+/* -*- 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/Array.h" // JS::NewArrayObject
+#include "js/PropertyAndElement.h" // JS_DefineElement, JS_DefineProperty
+#include "jsapi-tests/tests.h"
+
+static int callCount = 0;
+
+static bool AddProperty(JSContext* cx, JS::HandleObject obj, JS::HandleId id,
+ JS::HandleValue v) {
+ callCount++;
+ return true;
+}
+
+static const JSClassOps AddPropertyClassOps = {
+ AddProperty, // addProperty
+ nullptr, // delProperty
+ nullptr, // enumerate
+ nullptr, // newEnumerate
+ nullptr, // resolve
+ nullptr, // mayResolve
+ nullptr, // finalize
+ nullptr, // call
+ nullptr, // construct
+ nullptr, // trace
+};
+
+static const JSClass AddPropertyClass = {"AddPropertyTester", 0,
+ &AddPropertyClassOps};
+
+BEGIN_TEST(testAddPropertyHook) {
+ /*
+ * Do the test a bunch of times, because sometimes we seem to randomly
+ * miss the propcache.
+ */
+ static const int ExpectedCount = 100;
+
+ JS::RootedObject obj(cx, JS::NewArrayObject(cx, 0));
+ CHECK(obj);
+ JS::RootedValue arr(cx, JS::ObjectValue(*obj));
+
+ CHECK(JS_DefineProperty(cx, global, "arr", arr, JSPROP_ENUMERATE));
+
+ JS::RootedObject arrObj(cx, &arr.toObject());
+ for (int i = 0; i < ExpectedCount; ++i) {
+ obj = JS_NewObject(cx, &AddPropertyClass);
+ CHECK(obj);
+ CHECK(JS_DefineElement(cx, arrObj, i, obj, JSPROP_ENUMERATE));
+ }
+
+ // Now add a prop to each of the objects, but make sure to do
+ // so at the same bytecode location so we can hit the propcache.
+ EXEC(
+ "'use strict'; \n"
+ "for (var i = 0; i < arr.length; ++i) \n"
+ " arr[i].prop = 42; \n");
+
+ CHECK(callCount == ExpectedCount);
+
+ return true;
+}
+END_TEST(testAddPropertyHook)