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DataTargetWrapper: expose ICLRSymbolProvider.TryGetFieldOffset via CCW #5916

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Merged
max-charlamb merged 1 commit into from
Jul 7, 2026
+49 −0
Merged

DataTargetWrapper: expose ICLRSymbolProvider.TryGetFieldOffset via CCW #5916

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49 changes: 49 additions & 0 deletions src/SOS/SOS.Hosting/DataTargetWrapper.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,7 @@ public DataTargetWrapper(IServiceProvider services, IRuntime runtime)
builder = AddInterface(IID_ICLRSymbolProvider, false);
builder.AddMethod(new TryGetSymbolNameDelegate(TryGetSymbolName));
builder.AddMethod(new TryGetSymbolAddressDelegate(TryGetSymbolAddress));
builder.AddMethod(new TryGetFieldOffsetDelegate(TryGetFieldOffset));
builder.Complete();

AddRef();
Expand Down Expand Up @@ -491,6 +492,46 @@ private int TryGetSymbolAddress(
}
}

private int TryGetFieldOffset(
IntPtr self,
ulong moduleBase,
string typeName,
string fieldName,
uint* pOffset)
{
if (pOffset == null)
{
return HResult.E_INVALIDARG;
}
*pOffset = 0;

moduleBase &= _ignoreAddressBitsMask;

try
{
if (_symbolProvider is null)
{
return HResult.E_NOTIMPL;
}

if (string.IsNullOrEmpty(typeName) || string.IsNullOrEmpty(fieldName))
{
return HResult.E_INVALIDARG;
}

if (_symbolProvider.TryGetFieldOffset(moduleBase, typeName, fieldName, out uint offset))
{
*pOffset = offset;
return HResult.S_OK;
}
return HResult.E_FAIL;
}
catch
{
return HResult.E_FAIL;
}
}

#endregion

#region ICLRDataTarget delegates
Expand Down Expand Up @@ -656,6 +697,14 @@ private delegate int TryGetSymbolAddressDelegate(
[In][MarshalAs(UnmanagedType.LPWStr)] string name,
[Out] ulong* pAddress);

[UnmanagedFunctionPointer(CallingConvention.Winapi)]
private delegate int TryGetFieldOffsetDelegate(
[In] IntPtr self,
[In] ulong moduleBase,
[In][MarshalAs(UnmanagedType.LPWStr)] string typeName,
[In][MarshalAs(UnmanagedType.LPWStr)] string fieldName,
[Out] uint* pOffset);

#endregion
}
}
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