1. A computer-readable medium storing a debug-trace program that, when executed by a processor, causes the processor to: display on a display device trace data obtained from a trace data stream, the trace data comprising a plurality of addresses of instructions executed by a target processor; enable a user of the debug-trace program to select an address of the plurality of addresses to create a selected address; use the selected address to identify, within a log buffer that is maintained separately from the trace data stream, data based on an operating context proximate in time to when the instruction of the selected address was executed on the target processor, wherein the identified data is absent in the trace data stream; and display the identified data.