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C#: Tracer support for invoking csc directly. #20663

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Merged
merged 8 commits into from
Oct 22, 2025
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Merged

C#: Tracer support for invoking csc directly. #20663

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e560ac1
C#: Tracer support for invoking csc directly.
michaelnebel Oct 21, 2025
6bc15bc
C#: Add change-note.
michaelnebel Oct 21, 2025
af5622a
C#: Address review comments.
michaelnebel Oct 21, 2025
def522d
C#: Make sure that the file exists before attempting to get version i…
michaelnebel Oct 21, 2025
d5ff9bf
C#: Collapse tracer cases for csc, csc.exe and mcs.exe and remote quo…
michaelnebel Oct 22, 2025
e14879b
C#: Add integration test for DB creation using .NET 10 RC 2.
michaelnebel Oct 22, 2025
7a41408
C#: Use autobuilder instead of supplying build command.
michaelnebel Oct 22, 2025
47c751b
C#: Only run integration test on windows and linux.
michaelnebel Oct 22, 2025
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4 changes: 3 additions & 1 deletion csharp/extractor/Semmle.Extraction.CSharp/Extractor/CompilerVersion.cs
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Expand Up @@ -74,7 +74,9 @@ public CompilerVersion(Options options)
specifiedFramework = compilerDir;
}

var versionInfo = FileVersionInfo.GetVersionInfo(SpecifiedCompiler);
// If csc is specified as compiler name, then attempt to read the version information from csc.dll
var compilerBinaryName = Path.GetFileName(SpecifiedCompiler) == "csc" ? $"{SpecifiedCompiler}.dll" : SpecifiedCompiler;
var versionInfo = FileVersionInfo.GetVersionInfo(File.Exists(compilerBinaryName) ? compilerBinaryName : SpecifiedCompiler);
if (!knownCompilerNames.TryGetValue(versionInfo.OriginalFilename ?? string.Empty, out var vendor))
{
SkipExtractionBecause("the compiler name is not recognised");
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1 change: 1 addition & 0 deletions csharp/ql/integration-tests/linux/dotnet_10_rc2/Program.cs
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@@ -0,0 +1 @@
Console.WriteLine($"<arguments>{string.Join(",", args)}</arguments>");
10 changes: 10 additions & 0 deletions csharp/ql/integration-tests/linux/dotnet_10_rc2/dotnet_build.csproj
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@@ -0,0 +1,10 @@
<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net10.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>

</Project>
5 changes: 5 additions & 0 deletions csharp/ql/integration-tests/linux/dotnet_10_rc2/global.json
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@@ -0,0 +1,5 @@
{
"sdk": {
"version": "10.0.100-rc.2.25502.107"
}
}
6 changes: 6 additions & 0 deletions csharp/ql/integration-tests/linux/dotnet_10_rc2/test.py
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@@ -0,0 +1,6 @@
import os
import runs_on

@runs_on.linux
def test(codeql, csharp):
codeql.database.create()
1 change: 1 addition & 0 deletions csharp/ql/integration-tests/windows/dotnet_10_rc2/Program.cs
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Console.WriteLine($"<arguments>{string.Join(",", args)}</arguments>");
10 changes: 10 additions & 0 deletions csharp/ql/integration-tests/windows/dotnet_10_rc2/dotnet_build.csproj
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@@ -0,0 +1,10 @@
<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net10.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>

</Project>
5 changes: 5 additions & 0 deletions csharp/ql/integration-tests/windows/dotnet_10_rc2/global.json
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@@ -0,0 +1,5 @@
{
"sdk": {
"version": "10.0.100-rc.2.25502.107"
}
}
6 changes: 6 additions & 0 deletions csharp/ql/integration-tests/windows/dotnet_10_rc2/test.py
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@@ -0,0 +1,6 @@
import os
import runs_on

@runs_on.windows
def test(codeql, csharp):
codeql.database.create()
4 changes: 4 additions & 0 deletions csharp/ql/lib/change-notes/2025-10-21-dotnet-rc2-tracing.md
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@@ -0,0 +1,4 @@
---
category: minorAnalysis
---
* Added tracer support for macOS and Linux when the .NET CLI (`dotnet`) directly invokes the C# compiler (`csc`). This enhancement provides basic tracing and extraction capabilities for .NET 10 RC2 on these platforms.
4 changes: 2 additions & 2 deletions csharp/tools/tracing-config.lua
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Expand Up @@ -221,9 +221,9 @@ function RegisterExtractorPack(id)
}
local posixMatchers = {
DotnetMatcherBuild,
CreatePatternMatcher({ '^mcs%.exe$', '^csc%.exe$' }, MatchCompilerName,
CreatePatternMatcher({ '^mcs%.exe$', '^csc%.exe$', '^csc$' }, MatchCompilerName,
extractor, {
prepend = { '--compiler', '"${compiler}"' },
prepend = { '--compiler', '${compiler}' },
order = ORDER_BEFORE
}),
MsBuildMatcher,
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