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Reverting: Set AssemblyName.ProcessorArchitecture for compatibility (#80581) #84028

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merged 3 commits into from
Apr 1, 2023
Merged

Reverting: Set AssemblyName.ProcessorArchitecture for compatibility (#80581) #84028

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bacfb87
Reverting #80581
VSadov Mar 28, 2023
71dec1a
Adjust the test.
VSadov Mar 28, 2023
5f4ae05
keep new version of CalculateProcArch (do not revert)
VSadov Mar 31, 2023
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42 changes: 0 additions & 42 deletions ...s/System.Reflection.Metadata/src/System/Reflection/Metadata/MetadataReader.netstandard.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -85,12 +85,6 @@ public static unsafe AssemblyName GetAssemblyName(string assemblyFile)
peReader = new PEReader((byte*)safeBuffer.DangerousGetHandle(), (int)safeBuffer.ByteLength);
MetadataReader mdReader = peReader.GetMetadataReader(MetadataReaderOptions.None);
AssemblyName assemblyName = mdReader.GetAssemblyDefinition().GetAssemblyName();

AssemblyFlags aFlags = mdReader.AssemblyTable.GetFlags();
#pragma warning disable SYSLIB0037 // AssemblyName.ProcessorArchitecture is obsolete
assemblyName.ProcessorArchitecture = CalculateProcArch(peReader, aFlags);
#pragma warning restore SYSLIB0037

return assemblyName;
}
finally
Expand All @@ -107,42 +101,6 @@ public static unsafe AssemblyName GetAssemblyName(string assemblyFile)
}
}

private static ProcessorArchitecture CalculateProcArch(PEReader peReader, AssemblyFlags aFlags)
{
// 0x70 specifies "reference assembly".
// For these, CLR wants to return None as arch so they can be always loaded, regardless of process type.
if (((uint)aFlags & 0xF0) == 0x70)
return ProcessorArchitecture.None;

PEHeaders peHeaders = peReader.PEHeaders;
switch (peHeaders.CoffHeader.Machine)
{
case Machine.IA64:
return ProcessorArchitecture.IA64;
case Machine.Arm:
return ProcessorArchitecture.Arm;
case Machine.Amd64:
return ProcessorArchitecture.Amd64;
case Machine.I386:
{
CorFlags flags = peHeaders.CorHeader!.Flags;
if ((flags & CorFlags.ILOnly) != 0 &&
(flags & CorFlags.Requires32Bit) == 0)
{
// platform neutral.
return ProcessorArchitecture.MSIL;
}

// requires x86
return ProcessorArchitecture.X86;
}
}

// ProcessorArchitecture is a legacy API and does not cover other Machine kinds.
// For example ARM64 is not expressible
return ProcessorArchitecture.None;
}

private static AssemblyNameFlags GetAssemblyNameFlags(AssemblyFlags flags)
{
AssemblyNameFlags assemblyNameFlags = AssemblyNameFlags.None;
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2 changes: 1 addition & 1 deletion src/libraries/System.Reflection.Metadata/tests/Metadata/MetadataReaderTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -3095,7 +3095,7 @@ public void GetAssemblyName()
Assert.Equal(new AssemblyName(a.FullName).ToString(), name.ToString());

#pragma warning disable SYSLIB0037 // AssemblyName.ProcessorArchitecture is obsolete
Assert.Equal(ProcessorArchitecture.MSIL, name.ProcessorArchitecture);
Assert.Equal(ProcessorArchitecture.None, name.ProcessorArchitecture);
#pragma warning restore SYSLIB0037
}
}
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