1. A method comprising: determining at a hardware data processor during a debug mode of operation that an instruction stream has caused a physical page crossing to occur at a physical memory, the physical page crossing comprising a current access to a first physical address of the physical memory being to a different page of physical memory than a previous access to a second physical address of the physical memory; and in response to determining that an instruction stream has caused a physical page crossing to occur, performing a synchronization event that provides physical address information of the instruction stream during the debug mode that includes a representation of at least a portion of the first physical address.