Sharp, who broke into the NHL with Philadelphia in 2002-03, already has career highs with 22 goals and 36 points in his third season with the Blackhawks. He leads the NHL with seven shorthanded goals -- three shy of the team record -- and nine shorthanded points.
"I love the city of Chicago and the Chicago fans and I want to be here for a long time," Sharp said in a statement. "I feel that our team has improved and continues to get better. Team success is a product of individual success and I will do everything I can to help bring a championship to the city of Chicago."
Sharp's extension was part of a busy day for the Blackhawks.
Adams, who had been with the Hurricanes since 2000, had two goals and three assists this season.
Picked in the ninth round in 1996 by the then-Hartford Whalers, Adams played 427 games in seven seasons with Carolina, third-most since the team moved to North Carolina in 1997.
Cullen missed seven games with a concussion after he was hit by the New York Rangers' Colton Orr on Dec. 26. Walker missed six games with a knee injury and Hedican missed nine games with a sprained right knee.