v8/test/debugger/debug/debug-enable-disable-breakpoints.js

// Copyright 2008 the V8 project authors. All rights reserved.
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Debug = debug.Debug

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

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);

// Test function.
function f() {a=1;b=2;};

// This tests enabeling and disabling of break points including the case
// with several break points in the same location.
break_point_hit_count = 0;

// Set a breakpoint in f.
bp1 = Debug.setBreakPoint(f);
f();
assertEquals(1, break_point_hit_count);

// Deactivate all breakpoints.
Debug.debuggerFlags().breakPointsActive.setValue(false);
f();
assertEquals(1, break_point_hit_count);

// Activate all breakpoints.
Debug.debuggerFlags().breakPointsActive.setValue(true);
f();
assertEquals(2, break_point_hit_count);