third_party/v8/test/debugger/debug/debug-break-inline.js

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// This test tests that deoptimization due to debug breaks works for
// inlined functions where the full-code is generated before the
// debugger is attached.
//
//See http://code.google.com/p/chromium/issues/detail?id=105375

Debug = debug.Debug;

var count = 0;
var break_count = 0;

// Debug event listener which sets a breakpoint first time it is hit
// and otherwise counts break points hit and checks that the expected
// state is reached.
function listener(event, exec_state, event_data, data) {
  if (event == Debug.DebugEvent.Break) {
    break_count++;
    if (break_count == 1) {
      Debug.setBreakPoint(g, 3);
    }
  }
}

function f() {
  g();
}

function g() {
  count++;
  h();
  var b = 1;  // Break point is set here.
}

function h() {
  debugger;
}

%PrepareFunctionForOptimization(f);
f();f();f();
%OptimizeFunctionOnNextCall(f);
f();

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

f();

assertEquals(5, count);
assertEquals(2, break_count);

// Get rid of the debug event listener.
Debug.setListener(null);