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Add additional exclusions for dependency collection #6282

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merged 2 commits into from
Nov 15, 2024
Merged

Add additional exclusions for dependency collection #6282

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42843f5
Add additional exclusions for dependency collection
andrewlock Nov 14, 2024
0b151c6
Update tracer/src/Datadog.Trace/Telemetry/Collectors/DependencyTeleme…
andrewlock Nov 15, 2024
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22 changes: 13 additions & 9 deletions tracer/src/Datadog.Trace/Telemetry/Collectors/DependencyTelemetryCollector.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -176,15 +176,19 @@ private static bool IsHexChar(char c)

private static bool IsZeroVersionAssemblyPattern(string assemblyName)
{
return assemblyName.Length == 8
&& IsBase32Char(assemblyName[0])
&& IsBase32Char(assemblyName[1])
&& IsBase32Char(assemblyName[2])
&& IsBase32Char(assemblyName[3])
&& IsBase32Char(assemblyName[4])
&& IsBase32Char(assemblyName[5])
&& IsBase32Char(assemblyName[6])
&& IsBase32Char(assemblyName[7]);
// e.g.
// 454845b558934321ad350977dd095960
// akkynf62
return (assemblyName.Length == 8
&& IsBase32Char(assemblyName[0])
&& IsBase32Char(assemblyName[1])
&& IsBase32Char(assemblyName[2])
&& IsBase32Char(assemblyName[3])
&& IsBase32Char(assemblyName[4])
&& IsBase32Char(assemblyName[5])
&& IsBase32Char(assemblyName[6])
&& IsBase32Char(assemblyName[7]))
|| (assemblyName.Length >= 32 && IsHexString(assemblyName, 0));
}

private static bool IsBase32Char(char c)
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18 changes: 18 additions & 0 deletions tracer/test/Datadog.Trace.Tests/Telemetry/Collectors/DependencyTelemetryCollectorTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -184,6 +184,24 @@ public void DoesNotHaveChangesWhenAssemblyVersionIsZeroAndHasRandom8CharName()
}
}

[Theory]
[InlineData("454845b558934321ad350977dd095960")]
[InlineData("41e68894e3e54239abe61eb16cb0e158")]
[InlineData("a1bc683e730d425c9de5fdf00dbdc003")]
public void DoesNotHaveChangesWhenAssemblyVersionIsZeroAndHas32CharName(string name)
{
var ignoredName = CreateAssemblyName(new Version(0, 0, 0, 0), name: name);

var collector = new DependencyTelemetryCollector();
collector.AssemblyLoaded(ignoredName, "some-guid");

collector.HasChanges().Should().BeFalse($"{name} has a zero version");

var nonIgnoredName = CreateAssemblyName(new Version(1, 0, 0, 0), name: name);
collector.AssemblyLoaded(nonIgnoredName, "some-guid");
collector.HasChanges().Should().BeTrue($"{nonIgnoredName} has a non-zero version");
}

[Fact]
public void HasChangesWhenAddingSameAssemblyWithDifferentVersion()
{
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