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gsnapshot's Introduction

gsnapshot

global snapshot 一个更准,更快的difftest系统

在线演示文档

思路:

记录所有gpr，pc寄存器的改变和store指令的地址和值，打包成一个"快照"，

对于每个程序只需要运行一次REF,生成快照，之后不再需要运行REF,而是直接读取快照,

运行的时候一步一步地和快照进行对比,发现不同时,自动识别并输出可读性高的bug报告(期望和实际对比)

欢迎Star&PR

未来计划:

  • 不同详细级别的记录: 考虑到快照的大小,对于大型程序的快速验证可以先只记录GPR,遇到问题后,开启更详细的记录级别更精确地定位到问题,另外在快照文件.gsnapshot中记录级别,checker自动识别兼容
  • 支持KVM,QEMU,Spike作为REF生成快照,最好是非侵入式

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