Error detection in a data processing system

摘要

A compiler for incorporating error detection into executable code generates conventional assembler language object code from a source code file. The compiler identifies an error detection segment (EDS) in the assembler code, where the EDS includes a subset of basic blocks in the assembler code. The compiler also identifies register and memory references in the EDS and inserts a set of instructions into the EDS. The inserted instructions record an entry state and an exit state of the referenced registers and memory locations. The state information is stored in a checkpoint portion of system memory. The compiler may generate shadow EDS code including instructions mirroring the instructions in the main EDS and verifying instructions that compare results produced by the mirroring instructions with results produced by the main EDS. The shadow EDS initiates an error recovery process if results produced by the shadow EDS and the main EDS differ.