Using application state data and additional code to resolve deadlocks

A computer captures a thread state data of a first program. The computer generates a second program by applying a first program patch to the first program. The computer inserts additional code into a source code of the second program. The computer executes a first performance test using the second program and the inserted additional code. The computer monitors a first status of the second program and the inserted additional code that are under the first performance test. The computer determines a degree that a first deadlock state was prevented during the first performance test. The computer generates a first message based, at least in part, on the determined degree that the first deadlock state was prevented during the first performance test.