Which physics engine am I using in Cocos2dx Chipmunk or Box2d

Thanks for the reply. I am currently having issues with Continuous collision detection. I have read that chipmunk does not support that due to which my character passes through static bodies. I have my issue mentioned here in detail
to which you have already replied and I would be testing that out later today. Are you suggesting that I use Box2d instead ? Are there any cocos2dx box2d tutorials that you would suggest ?