| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently compress and record trace information and to increase information quantity of a trace memory. <P>SOLUTION: The trace system 20 is provided with: the trace memory 32 storing trace information showing a program execution state of a processor 10; a trace information compression unit 24 which compresses trace information into a previously decided trace format and circularly and sequentially stores the format in the trace memory 32; and an address register 28 holding an address which is finally stored in the trace memory 32. The content of the trace memory 32 is analyzed in an order opposite to an execution order of a program. A break of the trace format is searched, and trace analysis is performed in the execution order of the program from the break. The trace information compression unit is provided with a compression stop part 26 stopping compression of trace information. Trace information in a specified form is stored in the trace memory at the time of start and termination of trace. The trace system 20 can be incorporated in the processor 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
