JavaScriptCore-7600.1.4.17.5.tar.gz

[apple/javascriptcore.git] / tests / stress / sparse-array-entry-update-144067.js

diff --git a/tests/stress/sparse-array-entry-update-144067.js b/tests/stress/sparse-array-entry-update-144067.js
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+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+// Regression test for https://bugs.webkit.org/show_bug.cgi?id=144067.
+// This test aims to continually override the setter in a sparse array object, and
+// trigger GCs to give it a chance to collect the newly set entry value if the bug exists. 
+// With the bug fixed, this test should not crash.
+
+var data = {};
+var sparseObj = {};
+
+for (var i = 0; i < 5; i++)
+    sparseObj[i] = i;
+
+function useMemoryToTriggerGCs() {
+    var arr = [];
+    var limit = DFGTrue() ? 10000 : 100;
+    for (var i = 0; i < limit; i++)
+        arr[i] = { a: "using" + i, b: "up" + i, c: "memory" + i };
+    return arr;
+}
+
+function foo(x) {
+    if (!x)
+        return;
+    data.textContent = sparseObj.__defineSetter__("16384", foo);
+    for (var i = 0; i < 10; i++)
+        sparseObj.__defineSetter__("" + (16384 + i), foo);
+    useMemoryToTriggerGCs();
+    sparseObj[16384] = x - 1;
+}
+
+var recursionDepthNeededToTriggerTheFailure = 100;
+foo(recursionDepthNeededToTriggerTheFailure);