Abstract: A method and apparatus for handling exceptions during execution of a transaction is herein described. A compiler associates a transaction exception handler (TEH) with a transaction in program code, such as through insertion of a call to the TEH. The TEH is also associated with an exception data structure, such as an unwind table, that is utilized during runtime to call an appropriate handler in response to an exception. Additionally, the TEH code is generated by the compiler and inserted into the program code. Upon encountering an exception during execution of the transaction, the TEH is capable of dynamically resizing the transaction to the point of the exception through an attempted commit.