tests/stress/cloned-arguments-should-visit-callee-during-gc.js

   1 // Test that the ClonedArguments created by the Function.arguments will properly
   2 // keep its callee alive.  This test should not crash and should not print any error
   3 // messages.
   4
   5 var cachedArguments = [];
   6 var numberOfEntries = 1000;
   7
   8 function makeTransientFunction(i) {
   9     function transientFunc() {
  10         cachedArguments[i] = transientFunc.arguments;
  11     }
  12     return transientFunc;
  13 }
  14
  15 for (i = 0; i < numberOfEntries; i++) {
  16     var transientFunc = makeTransientFunction(i);
  17     transientFunc();
  18     // At this point, the only reference to the transient function is from
  19     // cachedArguments[i].callee.
  20 }
  21
  22 gc();
  23
  24 // Allocate a bunch of memory to stomp over the transient functions that may have been
  25 // erroneously collected. webkit.org/b/145709
  26 for (i = 0; i < numberOfEntries; i++) {
  27     new Object();
  28 }
  29
  30 for (i = 0; i < numberOfEntries; i++) {
  31     var callee = cachedArguments[i].callee;
  32     if (typeof callee != "function")
  33         print("ERROR: callee is " + callee);
  34 }