third_party/WebKit/LayoutTests/inspector/profiler/heap-snapshot-orphan-nodes.html

   1 <html>
   2 <head>
   3   <script src="../../http/tests/inspector/inspector-test.js"></script>
   4   <script src="heap-snapshot-test.js"></script>
   5 <script>
   6
   7 function test()
   8 {
   9     InspectorTest.runHeapSnapshotTestSuite([
  10         function testWeakReferencesDoNotAffectRetainedSize(next)
  11         {
  12             function createHeapSnapshot()
  13             {
  14                 // Mocking a heap snapshot with a node that retained by weak references only.
  15                 var builder = new InspectorTest.HeapSnapshotBuilder();
  16                 var rootNode = builder.rootNode;
  17
  18                 var gcRootsNode = new InspectorTest.HeapNode("(GC roots)");
  19                 rootNode.linkNode(gcRootsNode, InspectorTest.HeapEdge.Type.element);
  20
  21                 var windowNode = new InspectorTest.HeapNode("Window", 10);
  22                 rootNode.linkNode(windowNode, InspectorTest.HeapEdge.Type.shortcut);
  23                 gcRootsNode.linkNode(windowNode, InspectorTest.HeapEdge.Type.element);
  24
  25                 var orphanNode = new InspectorTest.HeapNode("Orphan", 2000);
  26                 windowNode.linkNode(orphanNode, InspectorTest.HeapEdge.Type.weak, "weak_ref");
  27
  28                 var orphanChildNode = new InspectorTest.HeapNode("OrphanChild", 2000);
  29                 orphanNode.linkNode(orphanChildNode, InspectorTest.HeapEdge.Type.property, "child");
  30
  31                 var aNode = new InspectorTest.HeapNode("A", 300);
  32                 windowNode.linkNode(aNode, InspectorTest.HeapEdge.Type.property, "a");
  33
  34                 var bNode = new InspectorTest.HeapNode("B", 300);
  35                 aNode.linkNode(bNode, InspectorTest.HeapEdge.Type.property, "b");
  36                 orphanChildNode.linkNode(bNode, InspectorTest.HeapEdge.Type.property, "b");
  37
  38                 // Shortcut links should not affect retained sizes.
  39                 rootNode.linkNode(windowNode, InspectorTest.HeapEdge.Type.shortcut, "w");
  40                 rootNode.linkNode(aNode, InspectorTest.HeapEdge.Type.shortcut, "a");
  41                 rootNode.linkNode(bNode, InspectorTest.HeapEdge.Type.shortcut, "b");
  42                 rootNode.linkNode(orphanNode, InspectorTest.HeapEdge.Type.shortcut, "o");
  43
  44                 return builder.generateSnapshot();
  45             }
  46
  47             InspectorTest.addSniffer(WebInspector.HeapSnapshotView.prototype, "_gotStatistics", checkStatistics, true);
  48             InspectorTest.takeAndOpenSnapshot(createHeapSnapshot, step1);
  49
  50             function checkStatistics(statistics)
  51             {
  52                 InspectorTest.assertEquals(4610, statistics.total);
  53                 InspectorTest.assertEquals(4610, statistics.v8heap);
  54                 InspectorTest.addResult("SUCCESS: total size is correct.");
  55             }
  56
  57             function step1()
  58             {
  59                 InspectorTest.switchToView("Summary", step2);
  60             }
  61
  62             function step2()
  63             {
  64                 var row = InspectorTest.findRow("A");
  65                 InspectorTest.assertEquals(true, !!row, "\"A\" row");
  66                 InspectorTest.assertEquals(1, row._count);
  67                 InspectorTest.assertEquals(300, row._retainedSize);
  68                 InspectorTest.assertEquals(300, row._shallowSize);
  69
  70
  71                 row = InspectorTest.findRow("B");
  72                 InspectorTest.assertEquals(true, !!row, "\"B\" row");
  73                 InspectorTest.assertEquals(1, row._count);
  74                 InspectorTest.assertEquals(300, row._retainedSize);
  75                 InspectorTest.assertEquals(300, row._shallowSize);
  76
  77                 row = InspectorTest.findRow("Orphan");
  78                 InspectorTest.assertEquals(true, !!row, "\"Orphan\" row");
  79                 InspectorTest.assertEquals(1, row._count);
  80                 InspectorTest.assertEquals(4000, row._retainedSize);
  81                 InspectorTest.assertEquals(2000, row._shallowSize);
  82
  83
  84                 row = InspectorTest.findRow("OrphanChild");
  85                 InspectorTest.assertEquals(true, !!row, "\"OrphanChild\" row");
  86                 InspectorTest.assertEquals(1, row._count);
  87                 InspectorTest.assertEquals(2000, row._retainedSize);
  88                 InspectorTest.assertEquals(2000, row._shallowSize);
  89
  90                 InspectorTest.addResult("SUCCESS: all nodes have expected retained sizes.");
  91                 setTimeout(next, 0);
  92             }
  93         }
  94     ]);
  95 }
  96
  97 </script>
  98 </head>
  99 <body onload="runTest()">
 100 <pre>
 101 Tests that weak references are ignored when dominators are calculated and that weak references won't affect object's retained size.
 102 </pre>
 103 </body>
 104 </html>