1 files changed, 62 insertions, 0 deletions
diff --git a/dom/plugins/test/mochitest/test_GCrace.html b/dom/plugins/test/mochitest/test_GCrace.html
new file mode 100644
index 000000000..50b598ef1
--- /dev/null
+++ b/dom/plugins/test/mochitest/test_GCrace.html
@@ -0,0 +1,62 @@
+<head>
+  <title>GC race with actors on the parent</title>
+
+  <script type="text/javascript"
+	  src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="plugin-utils.js"></script>
+  <link rel="stylesheet" type="text/css"
+	href="/tests/SimpleTest/test.css" />
+<body onload="start()">
+  <p id="display"></p>
+
+  <script class="testbody" type="application/javascript">
+    SimpleTest.waitForExplicitFinish();
+    SimpleTest.requestFlakyTimeout("untriaged");
+    setTestPluginEnabledState(SpecialPowers.Ci.nsIPluginTag.STATE_ENABLED);
+
+    function start() {
+      setTimeout(checkGCRace, 1000);
+    }
+
+    var nested = false;
+
+    function cb(f) {
+      ok(!nested, "Callback shouldn't occur in a nested stack frame");
+      try {
+        f(35);
+        ok(true, "Callback was called, no crash");
+      }
+      catch (e) {
+        ok(false, "Exception calling callback object: " + e);
+      }
+      SimpleTest.executeSoon(removePlugin);
+    }
+
+    function removePlugin() {
+      var p = document.getElementById('p');
+      p.parentNode.removeChild(p);
+      p = null;
+      SpecialPowers.Cu.forceGC();
+      SimpleTest.finish();
+    }
+
+    function checkGCRace() {
+      nested = true;
+
+      // The plugin will hand back a function and immediately sleep.
+      // We will lose our only reference to the function and force GC, followed
+      // by calling us with that function object again. We should be able to
+      // call the function and not crash.
+      var p = document.getElementById('p');
+      var f = p.checkGCRace(cb);
+      f = null;  // 'f' should be collected next GC
+
+      nested = false;
+
+      setTimeout(function() {
+        SpecialPowers.Cu.forceGC();
+      }, 2000);
+    }
+  </script>
+
+  <embed id="p" type="application/x-test" wmode="window"></embed>