如何读取llvm cov json格式？

我能够通过LLVMCOV以json格式导出代码覆盖率数据，但内容对我来说似乎很神秘。

段中的每个数字是什么意思

{
   "filename":"file.m",
   "segments":[
      [
         11,
         22,
         23,
         1,
         1
      ],
      [
         12,
         11,
         23,
         1,
         1
      ],
      ...
   ],
   "expansions":[

   ],
   "summary":{
      ...
   }
}

接着，JSON格式在源代码中进行了解释，我在中找到了源代码

包含以下说明：

The json code coverage export follows the following format
Root: dict => Root Element containing metadata
-- Data: array => Homogeneous array of one or more export objects
  -- Export: dict => Json representation of one CoverageMapping
    -- Files: array => List of objects describing coverage for files
      -- File: dict => Coverage for a single file
        -- Branches: array => List of Branches in the file
          -- Branch: dict => Describes a branch of the file with counters
        -- Segments: array => List of Segments contained in the file
          -- Segment: dict => Describes a segment of the file with a counter
        -- Expansions: array => List of expansion records
          -- Expansion: dict => Object that descibes a single expansion
            -- CountedRegion: dict => The region to be expanded
            -- TargetRegions: array => List of Regions in the expansion
              -- CountedRegion: dict => Single Region in the expansion
            -- Branches: array => List of Branches in the expansion
              -- Branch: dict => Describes a branch in expansion and counters
        -- Summary: dict => Object summarizing the coverage for this file
          -- LineCoverage: dict => Object summarizing line coverage
          -- FunctionCoverage: dict => Object summarizing function coverage
          -- RegionCoverage: dict => Object summarizing region coverage
          -- BranchCoverage: dict => Object summarizing branch coverage
    -- Functions: array => List of objects describing coverage for functions
      -- Function: dict => Coverage info for a single function
        -- Filenames: array => List of filenames that the function relates to
  -- Summary: dict => Object summarizing the coverage for the entire binary
    -- LineCoverage: dict => Object summarizing line coverage
    -- FunctionCoverage: dict => Object summarizing function coverage
    -- InstantiationCoverage: dict => Object summarizing inst. coverage
    -- RegionCoverage: dict => Object summarizing region coverage
    -- BranchCoverage: dict => Object summarizing branch coverage

可悲的是，对于一个片段是什么，或者它是如何构造的，这仍然不是很好的解释

更详细地查看代码，我们会发现以下两个片段：

json:：Array renderSegment（const coverage:：CoverageSegment&Segment）{
返回json:：数组（{Segment.Line，Segment.Col，int64_t（Segment.Count），
Segment.hascont，Segment.IsRegionEntry}）；
}

json:：Array renderRegion（const coverage:：CountedRegion&Region）{
返回json:：数组（{Region.LineStart，Region.ColumnStart，Region.LineEnd，
Region.ColumnEnd，int64_t（Region.ExecutionCount），
Region.FileID，Region.ExpandedFileID，
int64_t（Region.Kind）}）；
}

这会让你更好地理解这些条目的含义

文件ID似乎索引到了扩展中给出的文件名中。
除了前面的答案之外，我还发现这个页面非常有用：。它有助于解释
段
中的每个概念，如
行
，
列