third_party/WebKit/LayoutTests/plugins/refcount-leaks.html

   1 <script>
   2   function noop(x) {
   3   }
   4
   5   function doGC() {
   6     if (window.GCController) {
   7       window.GCController.collectAll();
   8     }
   9   }
  10
  11   function runtest() {
  12     if (window.testRunner)
  13       testRunner.dumpAsText();
  14
  15
  16     var output = document.getElementById("output");
  17     output.innerHTML = "";
  18
  19     // Test that objects are deleted after their JS references are released.
  20     var countOrig = plug.testObjectCount;
  21     o1 = plug.testCreateTestObject();
  22     o2 = plug.testCreateTestObject();
  23     o3 = plug.testCreateTestObject();
  24     var countAfterCreate = plug.testObjectCount;
  25     o1 = o2 = o3 = null;
  26     doGC();
  27     var countAfterGC = plug.testObjectCount;
  28
  29     output.innerHTML += "--- num test objects:<br>";
  30     output.innerHTML += "countAfterCreate == countOrig + 3? "
  31         + ((countAfterCreate == countOrig + 3) ? "PASS" : "FAIL")
  32         + "<br>";
  33     output.innerHTML += "countOrig == countAfterGC? "
  34         + ((countOrig == countAfterGC) ? "PASS" : "FAIL")
  35         + "<br>";
  36     output.innerHTML += "<br>";
  37
  38     // Test that the object refcount returns to normal after JS references
  39     // are released.
  40     var testObj = plug.testObject;
  41     var refOrig = testObj.refCount;
  42     var o1 = plug.testObject;
  43     var o2 = plug.testObject;
  44     var o3 = plug.testObject;
  45     var refAfterGet = testObj.refCount;
  46     o1 = o2 = o3 = null;
  47     doGC();
  48     var refAfterGetGC = testObj.refCount;
  49
  50     // Test that calling NPN_Invoke with our object as a parameter returns
  51     // our refcount to normal (may require a GC).
  52     plug.testPassTestObject("noop", testObj);
  53     plug.testPassTestObject("noop", testObj);
  54     plug.testPassTestObject("noop", testObj);
  55     doGC();
  56     var refAfterPass = testObj.refCount;
  57
  58     output.innerHTML += "--- refcount on plug.testObject:<br>";
  59     output.innerHTML += "originally: " + refOrig + "<br>";
  60     output.innerHTML += "after GC: " + refAfterGetGC + "<br>";
  61     output.innerHTML += "after passing: " + refAfterPass + "<br>";
  62
  63     var success = (countAfterGC == countOrig) && (refAfterPass == refOrig);
  64     output.innerHTML += (success ? "SUCCESS" : "FAILURE");
  65   }
  66 </script>
  67
  68 <body onload="runtest()">
  69
  70 Test that we can get an NPObject returned through a method on
  71 an NPAPI Object.<P>
  72
  73 Prints "SUCCESS" on success, "FAILURE" on failure.
  74
  75 <embed name="plug" type="application/x-webkit-test-netscape">
  76
  77 <div id=output>FAILURE</div>
  78
  79 </body>
  80