third_party/WebKit/LayoutTests/accessibility/container-node-delete-causes-crash.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <body>
   4 <script src="../resources/js-test.js"></script>
   5
   6 <div id="console"></div>
   7
   8 <svg xmlns:xlink="http://www.w3.org/1999/xlink">
   9   <text id="a">Text</text>
  10   <use xlink:href="#a"></use>
  11 </svg>
  12
  13 <script>
  14 description("Checks to make sure a heap-use-after-free crash doesn't occur when a container node with an associated accessibility object is deleted from the tree. The heap-use-after free was occuring when the AccessibilityObject corresponding to the child of the text node walked up its parent chain in AccessibilityObject::supportsARIALiveRegion but its parent was already deleted.");
  15
  16 // This creates an accessibility object for every node in the tree.
  17 if (window.accessibilityController)
  18     accessibilityController.accessibleElementById("foo");
  19
  20 // An SVG "use" element is like a clone, so the "use" element contains a
  21 // clone of the "text" element. This statement clears the reference, which
  22 // causes the cloned "text" element to be destroyed.
  23 document.getElementsByTagName('use')[0].setAttribute('xlink:href', '');
  24 </script>
  25
  26 </body>
  27 </html>