test/mjsunit/debug-script-breakpoints-nested.js

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// Flags: --expose-debug-as debug
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug

// Simple debug event handler which just counts the number of break points hit.
var break_point_hit_count = 0;

function listener(event, exec_state, event_data, data) {
  if (event == Debug.DebugEvent.Break) {
    break_point_hit_count++;
  }
};

// Add the debug event listener.
Debug.setListener(listener);

eval(
  "var inner;\n" +
  "function outer() {\n" +         // Non-trivial outer closure.
  "  var x = 5;\n" +
  "  function a() {\n" +
  "    var foo = 0, y = 7;\n" +
  "    function b() {\n" +
  "      var bar = 0, baz = 0, z = 11;\n" +
  "      function c() {\n" +
  "        return x + y + z;\n" +  // Breakpoint line ( #8 )
  "      }\n" +
  "      inner = c;\n" +
  "      return c();\n" +
  "    }\n" +
  "    return b();\n" +
  "  }\n" +
  "  return a();\n" +
  "}"
);

var script = Debug.findScript(outer);

// The debugger triggers compilation of inner closures.
assertEquals(0, Debug.scriptBreakPoints().length);
var sbp = Debug.setScriptBreakPointById(script.id, 8);
assertEquals(1, Debug.scriptBreakPoints().length);

// The compiled outer closure should behave correctly.
assertEquals(23, outer());
assertEquals(1, break_point_hit_count);

// The compiled inner closure should behave correctly.
assertEquals(23, inner());
assertEquals(2, break_point_hit_count);

// Remove script break point.
assertEquals(1, Debug.scriptBreakPoints().length);
Debug.clearBreakPoint(sbp);
assertEquals(0, Debug.scriptBreakPoints().length);