add a test for double free detection

libxmljs · Jan 6, 2013 · f652298 · f652298
1 parent ceb6f23
commit f652298
Showing 1 changed file with 23 additions and 0 deletions.
diff --git a/test/ref_integrity.js b/test/ref_integrity.js
@@ -25,3 +25,26 @@ module.exports.references = function(assert) {
     assert.equal("child", nodes[1].name());
     assert.done();
 };
+
+// test that double-freeing XmlNode's doesn't cause a segfault
+module.exports.double_free = function(assert) {
+    var children = null;
+
+    // stick this portion of code into a self-executing function so
+    // its internal variables can be garbage collected
+    (function(){
+        var html = '<html><body><div><span></span></div></body></html>';
+        var doc = libxml.parseHtml(html);
+
+        doc.find('//div').forEach(function(tag){
+            // provide a reference to childNodes so they are exposed as XmlNodes
+            // and therefore subject to V8's garbage collection
+            children = tag.childNodes();
+            tag.remove();
+        });
+    })();
+
+    global.gc();
+    assert.ok(children[0].attrs());
+    assert.done();
+};