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wyz-icer avatar wyz-icer commented on August 12, 2024

2023 年 8 月 24 日@第三届 RISC -V **峰会 内公布内容,香山当前流程支持 " CPU 的覆盖率导向模糊测试" 相关内容
结合当前difftest 提交版本 master 分支内 scripts/coverage
相关脚本分析,主要支持功能:

  1. 依verilator 识别规则对verilog 文件进行预处理 以 统计需要范围内的覆盖情况
  2. 获取代码覆盖结果数据

问题:

  1. 有没有更多的关于覆盖率导向模糊测试的 流程说明 或者使用说明;
  2. 在哪儿可以看到 峰会提到的 覆盖率收集闭环流程: 收集--算法推导分析代码覆盖率--测试激励再输入--协同仿真 的流程迭代。

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poemonsense avatar poemonsense commented on August 12, 2024

Please refer to https://github.com/OpenXiangShan/xfuzz

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wyz-icer avatar wyz-icer commented on August 12, 2024

好的 感谢!

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wyz-icer avatar wyz-icer commented on August 12, 2024

Please refer to https://github.com/OpenXiangShan/xfuzz

关于这个仓库有没有更详细一点的使用说明

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poemonsense avatar poemonsense commented on August 12, 2024

Please refer to https://github.com/OpenXiangShan/xfuzz

关于这个仓库有没有更详细一点的使用说明

目前没有了。这个仓库的所有命令都已经列在README里面了

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wyz-icer avatar wyz-icer commented on August 12, 2024

Please refer to https://github.com/OpenXiangShan/xfuzz

关于这个仓库有没有更详细一点的使用说明

目前没有了。这个仓库的所有命令都已经列在README里面了

比如readme 内提到的 集成design内 提到的几点

  1. it could be passed to Verilator as an external library for linking. //如何配置link至verilator
  2. The required interfaces between Rust and C/C++ modules are listed exclusively at [the harness file] (https://github.com/OpenXiangShan/xfuzz/blob/main/src/harness.rs). //这些接口是和difftest内交互用的吗?
  3. have upgraded the DiffTest environment to support these interfaces. //如何配置同difftest交互
  4. Please refer to the DiffTest README.md for connecting your CPU design with the fuzzer. //difftest 支持生成verilog相关接口命令”make difftest_verilog NOOP_HOME=$(pwd)“ , 如何同xfuzz进行连接?

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poemonsense avatar poemonsense commented on August 12, 2024

可以参考 CI 流程中的 Difftest with Coverage-Guided Fuzzer 部分:https://github.com/OpenXiangShan/difftest/blob/master/.github/workflows/main.yml

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