Abstract: Aspects of the subject matter described herein relate to software validation. In aspects, code may be instrumented to generate certain records upon execution. The code may be further instrumented to generate start and stop records that correspond to the start and stop events of a scenario of a program. The start and stop event records allow correlation of the scenario with other records written to the log. With the correlation and appropriate instrumentation, a tool may determine performance, memory usage, functional correctness, and other characteristics of program at the granularity of the scenario.