third_party/WebKit/LayoutTests/inspector/sources/debugger/debugger-activation-crash2.html

   1 <script src="../../../http/tests/inspector/inspector-test.js"></script>
   2 <script src="../../../http/tests/inspector/debugger-test.js"></script>
   3
   4 <script>
   5 var closures = [];
   6 function makeClosure() {
   7     var v1, v2, v3, v4, v5, v6, v7, v8, v9, v10; // Make a lot of potentially captured variables.
   8     return function () {
   9         var x = v1; // But only capture one in optimizing compiles.
  10         return x;
  11     };
  12 }
  13
  14 for (var i = 0; i < 100; ++i) {
  15     closures.push(makeClosure());
  16 }
  17
  18 closures[0](); // Force compilation.
  19 function testFunction() {
  20     closures[0](); // Force recompilation.
  21
  22     // At this point, closures[0] captured 1 variable but thinks it captured 10.
  23     // If so, stopping at a breakpoint should make it crash.
  24 }
  25
  26 function test() {
  27     InspectorTest.startDebuggerTest(step1);
  28
  29     function step1()
  30     {
  31         InspectorTest.showScriptSource("debugger-activation-crash2.html", step2);
  32     }
  33
  34     function step2(sourceFrame)
  35     {
  36         InspectorTest.addResult("Script source was shown.");
  37         InspectorTest.setBreakpoint(sourceFrame, 8, "", true);
  38         InspectorTest.runTestFunctionAndWaitUntilPaused(step3);
  39     }
  40
  41     function step3(callFrames)
  42     {
  43         InspectorTest.captureStackTrace(callFrames, null, { dropLineNumbers: true });
  44         InspectorTest.completeDebuggerTest();
  45     }
  46 }
  47
  48 window.onload = runTest;
  49 </script>
  50
  51 <p>
  52 Tests for a crash when paused at a breakpoint caused by inaccurate Activation records.
  53 <a href="https://bugs.webkit.org/show_bug.cgi?id=57120">Bug 57120</a>
  54 </p>