一些便携式PDB文件中缺少序列点

发布于 2025-01-28 14:46:04 字数 1442 浏览 3 评论 0原文

上下文

我正在为.NET库开发文档生成工具，该工具通过反射从组件中提取类型，并从编译时生成的XML中提取相关文档。

我的项目以获取

上下文

更多成员（方法，属性...）在源代码中其起源 - 提取源文件和相关行号。

当前状态

我已经使用了system.reflection.metadata加载PDB文件并成功提取所需数据。

using var stream = new StreamReader(pdbPath);
var provider = MetadataReaderProvider.FromPortablePdbStream(stream.BaseStream, MetadataStreamOptions.PrefetchMetadata, 0);
var reader = provider.GetMetadataReader();
var scopes = reader.MethodDebugInformation
  .Where(h => !h.IsNil)
  .Select(md => (reader.GetMethodDebugInformation(md), System.Reflection.Metadata.Ecma335.MetadataTokens.GetToken(md.ToDefinitionHandle())))
  .Where(m => !m.Item1.SequencePointsBlob.IsNil)
  .Select(m =>
  {
      return m.Item1.GetSequencePoints()
      .Select(sp =>
      {
           var document = reader.GetDocument(sp.Document);
            var name = reader.GetString(document.Name);

            return (m.Item2, sp.StartLine, name);
      })
      .OrderBy(x => x.StartLine)
      .First();
  })
  .ToArray();

问题

问题是MethodDebugInformation sequencepoints无法可靠。我的一些PDB一无所获，另一些返回所有成员序列点。

所有测试的PDB均来自.NET Core/5+项目。否.NET框架。

问题

我在做什么错？我的PDB错误地编译了吗？还是我滥用反射库？预先感谢您的任何提示

原文

Context

I'm developing a documentation generating tool for .NET libraries, which extracts types from assemblies via reflection and relevant documentation from the compile-time generated XML.

My project for more context

Goal

I want to extend my tool with the ability to display for each type member (method, property...) their origin in the source code - extract the source file and relevant line number.

Current state

I've used System.Reflection.Metadata to load PDB files and extract the required data successfully.

using var stream = new StreamReader(pdbPath);
var provider = MetadataReaderProvider.FromPortablePdbStream(stream.BaseStream, MetadataStreamOptions.PrefetchMetadata, 0);
var reader = provider.GetMetadataReader();
var scopes = reader.MethodDebugInformation
  .Where(h => !h.IsNil)
  .Select(md => (reader.GetMethodDebugInformation(md), System.Reflection.Metadata.Ecma335.MetadataTokens.GetToken(md.ToDefinitionHandle())))
  .Where(m => !m.Item1.SequencePointsBlob.IsNil)
  .Select(m =>
  {
      return m.Item1.GetSequencePoints()
      .Select(sp =>
      {
           var document = reader.GetDocument(sp.Document);
            var name = reader.GetString(document.Name);

            return (m.Item2, sp.StartLine, name);
      })
      .OrderBy(x => x.StartLine)
      .First();
  })
  .ToArray();

Issue

The issue is that the MethodDebugInformation SequencePoints are not reliably available. Some of my PDBs return nothing, others return all member sequence points.

All tested PDBs come from .NET Core/5+ projects. No .NET Framework.