plugins/refcount-leaks.html

<script>
  function noop(x) {
  }

  function doGC() {
    if (window.GCController) {
      // GC twice to make sure everything is cleaned up.
      for (var i = 0; i < 2; i++) {
        window.GCController.collect();
      }
    }
  }

  function runtest() {
    if (window.testRunner)
      testRunner.dumpAsText();


    var output = document.getElementById("output");
    output.innerHTML = "";

    // Test that objects are deleted after their JS references are released.
    var countOrig = plug.testObjectCount;
    o1 = plug.testCreateTestObject();
    o2 = plug.testCreateTestObject();
    o3 = plug.testCreateTestObject();
    var countAfterCreate = plug.testObjectCount;
    o1 = o2 = o3 = null;
    doGC();
    var countAfterGC = plug.testObjectCount;

    output.innerHTML += "--- num test objects:<br>";
    output.innerHTML += "countAfterCreate == countOrig + 3? "
        + ((countAfterCreate == countOrig + 3) ? "PASS" : "FAIL")
        + "<br>";
    output.innerHTML += "countOrig == countAfterGC? "
        + ((countOrig == countAfterGC) ? "PASS" : "FAIL")
        + "<br>";
    output.innerHTML += "<br>";

    // Test that the object refcount returns to normal after JS references
    // are released.
    var testObj = plug.testObject;
    var refOrig = testObj.refCount;
    var o1 = plug.testObject;
    var o2 = plug.testObject;
    var o3 = plug.testObject;
    var refAfterGet = testObj.refCount;
    o1 = o2 = o3 = null;
    doGC();
    var refAfterGetGC = testObj.refCount;

    // Test that calling NPN_Invoke with our object as a parameter returns
    // our refcount to normal (may require a GC).
    plug.testPassTestObject("noop", testObj);
    plug.testPassTestObject("noop", testObj);
    plug.testPassTestObject("noop", testObj);
    doGC();
    var refAfterPass = testObj.refCount;

    output.innerHTML += "--- refcount on plug.testObject:<br>";
    output.innerHTML += "originally: " + refOrig + "<br>";
    output.innerHTML += "after GC: " + refAfterGetGC + "<br>";
    output.innerHTML += "after passing: " + refAfterPass + "<br>";

    var success = (countAfterGC == countOrig) && (refAfterPass == refOrig);
    output.innerHTML += (success ? "SUCCESS" : "FAILURE");
  }
</script>

<body onload="runtest()">

Test that we can get an NPObject returned through a method on
an NPAPI Object.<P>

Prints "SUCCESS" on success, "FAILURE" on failure.

<embed name="plug" type="application/x-webkit-test-netscape">

<div id=output>FAILURE</div>

</body>