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Merged
max-charlamb merged 2 commits into from
Mar 6, 2026
Merged

[cDAC] Add custom marshallers for COM interface parameters #125132

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e1c226b
Add custom marshallers for COM interface parameters
Mar 5, 2026
08ff1af
fix spelling
Mar 5, 2026
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2 changes: 1 addition & 1 deletion src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataAppDomain.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -62,7 +62,7 @@ int IXCLRDataAppDomain.IsSameObject(IXCLRDataAppDomain* appDomain)
return hr;
}

int IXCLRDataAppDomain.GetManagedObject(/*IXCLRDataValue*/ void** value)
int IXCLRDataAppDomain.GetManagedObject(DacComNullableByRef<IXCLRDataValue> value)
=> _legacyImpl is not null ? _legacyImpl.GetManagedObject(value) : HResults.E_NOTIMPL;

int IXCLRDataAppDomain.Request(uint reqCode, uint inBufferSize, byte* inBuffer, uint outBufferSize, byte* outBuffer)
Expand Down
17 changes: 9 additions & 8 deletions src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataFrame.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -101,7 +101,7 @@ int IXCLRDataFrame.GetNumArguments(uint* numArgs)

int IXCLRDataFrame.GetArgumentByIndex(
uint index,
void** arg,
DacComNullableByRef<IXCLRDataValue> arg,
uint bufLen,
uint* nameLen,
char* name)
Expand Down Expand Up @@ -172,7 +172,7 @@ int IXCLRDataFrame.GetNumLocalVariables(uint* numLocals)

int IXCLRDataFrame.GetLocalVariableByIndex(
uint index,
void** localVariable,
DacComNullableByRef<IXCLRDataValue> localVariable,
uint bufLen,
uint* nameLen,
char* name)
Expand All @@ -185,16 +185,17 @@ int IXCLRDataFrame.GetCodeName(
char* nameBuf)
=> _legacyImpl is not null ? _legacyImpl.GetCodeName(flags, bufLen, nameLen, nameBuf) : HResults.E_NOTIMPL;

int IXCLRDataFrame.GetMethodInstance(out IXCLRDataMethodInstance? method)
int IXCLRDataFrame.GetMethodInstance(DacComNullableByRef<IXCLRDataMethodInstance> method)
{
int hr = HResults.S_OK;
method = null;

int hrLocal = HResults.S_OK;
IXCLRDataMethodInstance? legacyMethod = null;
if (_legacyImpl is not null)
{
hrLocal = _legacyImpl.GetMethodInstance(out legacyMethod);
DacComNullableByRef<IXCLRDataMethodInstance> legacyMethodOut = new(isNullRef: false);
hrLocal = _legacyImpl.GetMethodInstance(legacyMethodOut);
legacyMethod = legacyMethodOut.Interface;
}

try
Expand All @@ -211,7 +212,7 @@ int IXCLRDataFrame.GetMethodInstance(out IXCLRDataMethodInstance? method)
TargetPointer appDomain = _target.ReadPointer(
_target.ReadGlobalPointer(Constants.Globals.AppDomain));

method = new ClrDataMethodInstance(_target, mdh, appDomain, legacyMethod);
method.Interface = new ClrDataMethodInstance(_target, mdh, appDomain, legacyMethod);
}
catch (System.Exception ex)
{
Expand Down Expand Up @@ -239,10 +240,10 @@ int IXCLRDataFrame.Request(
int IXCLRDataFrame.GetNumTypeArguments(uint* numTypeArgs)
=> _legacyImpl is not null ? _legacyImpl.GetNumTypeArguments(numTypeArgs) : HResults.E_NOTIMPL;

int IXCLRDataFrame.GetTypeArgumentByIndex(uint index, void** typeArg)
int IXCLRDataFrame.GetTypeArgumentByIndex(uint index, DacComNullableByRef<IXCLRDataTypeInstance> typeArg)
=> _legacyImpl is not null ? _legacyImpl.GetTypeArgumentByIndex(index, typeArg) : HResults.E_NOTIMPL;

// IXCLRDataFrame2 implementation
int IXCLRDataFrame2.GetExactGenericArgsToken(void** genericToken)
int IXCLRDataFrame2.GetExactGenericArgsToken(DacComNullableByRef<IXCLRDataValue> genericToken)
=> _legacyImpl2 is not null ? _legacyImpl2.GetExactGenericArgsToken(genericToken) : HResults.E_NOTIMPL;
}
39 changes: 12 additions & 27 deletions ...ive/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataMethodInstance.cs
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Expand Up @@ -33,16 +33,15 @@ public ClrDataMethodInstance(
_legacyImpl = legacyImpl;
}

int IXCLRDataMethodInstance.GetTypeInstance(void** typeInstance)
int IXCLRDataMethodInstance.GetTypeInstance(DacComNullableByRef<IXCLRDataTypeInstance> typeInstance)
=> _legacyImpl is not null ? _legacyImpl.GetTypeInstance(typeInstance) : HResults.E_NOTIMPL;

int IXCLRDataMethodInstance.GetDefinition(void** methodDefinition)
int IXCLRDataMethodInstance.GetDefinition(DacComNullableByRef<IXCLRDataMethodDefinition> methodDefinition)
=> _legacyImpl is not null ? _legacyImpl.GetDefinition(methodDefinition) : HResults.E_NOTIMPL;

int IXCLRDataMethodInstance.GetTokenAndScope(uint* token, void** /*IXCLRDataModule*/ mod)
int IXCLRDataMethodInstance.GetTokenAndScope(uint* token, DacComNullableByRef<IXCLRDataModule> mod)
{
int hr = HResults.S_OK;
StrategyBasedComWrappers cw = new();

try
{
Expand All @@ -51,31 +50,22 @@ int IXCLRDataMethodInstance.GetTokenAndScope(uint* token, void** /*IXCLRDataModu
{
*token = rts.GetMethodToken(_methodDesc);
}
if (mod is not null)
if (!mod.IsNullRef)
{
IXCLRDataModule? legacyMod = null;
if (_legacyImpl is not null)
{
void* legacyModPtr = null;
int hrLegacy = _legacyImpl.GetTokenAndScope(token, &legacyModPtr);
DacComNullableByRef<IXCLRDataModule> legacyModOut = new(isNullRef: false);
int hrLegacy = _legacyImpl.GetTokenAndScope(token, legacyModOut);
if (hrLegacy < 0)
return hrLegacy;
object obj = cw.GetOrCreateObjectForComInstance((nint)legacyModPtr, CreateObjectFlags.None);
if (obj is not IXCLRDataModule)
{
throw new ArgumentException("Invalid module object", nameof(mod));
}
legacyMod = obj as IXCLRDataModule;
legacyMod = legacyModOut.Interface;
}

TargetPointer mtAddr = rts.GetMethodTable(_methodDesc);
TypeHandle mainMT = rts.GetTypeHandle(mtAddr);
TargetPointer module = rts.GetModule(mainMT);
IXCLRDataModule modImpl = new ClrDataModule(module, _target, legacyMod);
nint modImplPtr = cw.GetOrCreateComInterfaceForObject(modImpl, CreateComInterfaceFlags.None);
Marshal.QueryInterface(modImplPtr, typeof(IXCLRDataModule).GUID, out nint ptrToMod);
Marshal.Release(modImplPtr);
*mod = (void*)ptrToMod;
mod.Interface = new ClrDataModule(module, _target, legacyMod);
}
}
catch (System.Exception ex)
Expand All @@ -87,23 +77,18 @@ int IXCLRDataMethodInstance.GetTokenAndScope(uint* token, void** /*IXCLRDataModu
if (_legacyImpl is not null)
{
bool validateToken = token is not null;
bool validateMod = mod is not null;
bool validateMod = !mod.IsNullRef;

uint tokenLocal = 0;
void* legacyModPtr = null;
int hrLocal = _legacyImpl.GetTokenAndScope(validateToken ? &tokenLocal : null, validateMod ? &legacyModPtr : null);
DacComNullableByRef<IXCLRDataModule> legacyModOutLocal = new(isNullRef: !validateMod);
int hrLocal = _legacyImpl.GetTokenAndScope(validateToken ? &tokenLocal : null, legacyModOutLocal);

Debug.ValidateHResult(hr, hrLocal);

if (validateToken)
{
Debug.Assert(tokenLocal == *token, $"cDAC: {*token:x}, DAC: {tokenLocal:x}");
}

if (validateMod && hr == HResults.S_OK)
{
Marshal.Release((nint)legacyModPtr); // release the legacy module
}
}
#endif

Expand Down Expand Up @@ -200,7 +185,7 @@ int IXCLRDataMethodInstance.GetEnCVersion(uint* version)
int IXCLRDataMethodInstance.GetNumTypeArguments(uint* numTypeArgs)
=> _legacyImpl is not null ? _legacyImpl.GetNumTypeArguments(numTypeArgs) : HResults.E_NOTIMPL;

int IXCLRDataMethodInstance.GetTypeArgumentByIndex(uint index, void** typeArg)
int IXCLRDataMethodInstance.GetTypeArgumentByIndex(uint index, DacComNullableByRef<IXCLRDataTypeInstance> typeArg)
=> _legacyImpl is not null ? _legacyImpl.GetTypeArgumentByIndex(index, typeArg) : HResults.E_NOTIMPL;

int IXCLRDataMethodInstance.GetILOffsetsByAddress(ClrDataAddress address, uint offsetsLen, uint* offsetsNeeded, uint* ilOffsets)
Expand Down
33 changes: 15 additions & 18 deletions src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataModule.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -62,65 +62,62 @@ CustomQueryInterfaceResult ICustomQueryInterface.GetInterface(ref Guid iid, out

int IXCLRDataModule.StartEnumAssemblies(ulong* handle)
=> _legacyModule is not null ? _legacyModule.StartEnumAssemblies(handle) : HResults.E_NOTIMPL;
int IXCLRDataModule.EnumAssembly(ulong* handle, /*IXCLRDataAssembly*/ void** assembly)
int IXCLRDataModule.EnumAssembly(ulong* handle, DacComNullableByRef<IXCLRDataAssembly> assembly)
=> _legacyModule is not null ? _legacyModule.EnumAssembly(handle, assembly) : HResults.E_NOTIMPL;
int IXCLRDataModule.EndEnumAssemblies(ulong handle)
=> _legacyModule is not null ? _legacyModule.EndEnumAssemblies(handle) : HResults.E_NOTIMPL;

int IXCLRDataModule.StartEnumTypeDefinitions(ulong* handle)
=> _legacyModule is not null ? _legacyModule.StartEnumTypeDefinitions(handle) : HResults.E_NOTIMPL;
int IXCLRDataModule.EnumTypeDefinition(ulong* handle, /*IXCLRDataTypeDefinition*/ void** typeDefinition)
int IXCLRDataModule.EnumTypeDefinition(ulong* handle, DacComNullableByRef<IXCLRDataTypeDefinition> typeDefinition)
=> _legacyModule is not null ? _legacyModule.EnumTypeDefinition(handle, typeDefinition) : HResults.E_NOTIMPL;
int IXCLRDataModule.EndEnumTypeDefinitions(ulong handle)
=> _legacyModule is not null ? _legacyModule.EndEnumTypeDefinitions(handle) : HResults.E_NOTIMPL;

int IXCLRDataModule.StartEnumTypeInstances(/*IXCLRDataAppDomain*/ void* appDomain, ulong* handle)
int IXCLRDataModule.StartEnumTypeInstances(IXCLRDataAppDomain? appDomain, ulong* handle)
=> _legacyModule is not null ? _legacyModule.StartEnumTypeInstances(appDomain, handle) : HResults.E_NOTIMPL;
int IXCLRDataModule.EnumTypeInstance(ulong* handle, /*IXCLRDataTypeInstance*/ void** typeInstance)
int IXCLRDataModule.EnumTypeInstance(ulong* handle, DacComNullableByRef<IXCLRDataTypeInstance> typeInstance)
=> _legacyModule is not null ? _legacyModule.EnumTypeInstance(handle, typeInstance) : HResults.E_NOTIMPL;
int IXCLRDataModule.EndEnumTypeInstances(ulong handle)
=> _legacyModule is not null ? _legacyModule.EndEnumTypeInstances(handle) : HResults.E_NOTIMPL;

int IXCLRDataModule.StartEnumTypeDefinitionsByName(char* name, uint flags, ulong* handle)
=> _legacyModule is not null ? _legacyModule.StartEnumTypeDefinitionsByName(name, flags, handle) : HResults.E_NOTIMPL;
int IXCLRDataModule.EnumTypeDefinitionByName(ulong* handle, /*IXCLRDataTypeDefinition*/ void** type)
int IXCLRDataModule.EnumTypeDefinitionByName(ulong* handle, DacComNullableByRef<IXCLRDataTypeDefinition> type)
=> _legacyModule is not null ? _legacyModule.EnumTypeDefinitionByName(handle, type) : HResults.E_NOTIMPL;
int IXCLRDataModule.EndEnumTypeDefinitionsByName(ulong handle)
=> _legacyModule is not null ? _legacyModule.EndEnumTypeDefinitionsByName(handle) : HResults.E_NOTIMPL;

int IXCLRDataModule.StartEnumTypeInstancesByName(char* name, uint flags, /*IXCLRDataAppDomain*/ void* appDomain, ulong* handle)
int IXCLRDataModule.StartEnumTypeInstancesByName(char* name, uint flags, IXCLRDataAppDomain? appDomain, ulong* handle)
=> _legacyModule is not null ? _legacyModule.StartEnumTypeInstancesByName(name, flags, appDomain, handle) : HResults.E_NOTIMPL;
int IXCLRDataModule.EnumTypeInstanceByName(ulong* handle, /*IXCLRDataTypeInstance*/ void** type)
int IXCLRDataModule.EnumTypeInstanceByName(ulong* handle, DacComNullableByRef<IXCLRDataTypeInstance> type)
=> _legacyModule is not null ? _legacyModule.EnumTypeInstanceByName(handle, type) : HResults.E_NOTIMPL;
int IXCLRDataModule.EndEnumTypeInstancesByName(ulong handle)
=> _legacyModule is not null ? _legacyModule.EndEnumTypeInstancesByName(handle) : HResults.E_NOTIMPL;

int IXCLRDataModule.GetTypeDefinitionByToken(/*mdTypeDef*/ uint token, /*IXCLRDataTypeDefinition*/ void** typeDefinition)
int IXCLRDataModule.GetTypeDefinitionByToken(/*mdTypeDef*/ uint token, DacComNullableByRef<IXCLRDataTypeDefinition> typeDefinition)
=> _legacyModule is not null ? _legacyModule.GetTypeDefinitionByToken(token, typeDefinition) : HResults.E_NOTIMPL;

int IXCLRDataModule.StartEnumMethodDefinitionsByName(char* name, uint flags, ulong* handle)
=> _legacyModule is not null ? _legacyModule.StartEnumMethodDefinitionsByName(name, flags, handle) : HResults.E_NOTIMPL;
int IXCLRDataModule.EnumMethodDefinitionByName(ulong* handle, /*IXCLRDataMethodDefinition*/ void** method)
int IXCLRDataModule.EnumMethodDefinitionByName(ulong* handle, DacComNullableByRef<IXCLRDataMethodDefinition> method)
=> _legacyModule is not null ? _legacyModule.EnumMethodDefinitionByName(handle, method) : HResults.E_NOTIMPL;
int IXCLRDataModule.EndEnumMethodDefinitionsByName(ulong handle)
=> _legacyModule is not null ? _legacyModule.EndEnumMethodDefinitionsByName(handle) : HResults.E_NOTIMPL;

int IXCLRDataModule.StartEnumMethodInstancesByName(char* name, uint flags, /*IXCLRDataAppDomain*/ void* appDomain, ulong* handle)
int IXCLRDataModule.StartEnumMethodInstancesByName(char* name, uint flags, IXCLRDataAppDomain? appDomain, ulong* handle)
=> _legacyModule is not null ? _legacyModule.StartEnumMethodInstancesByName(name, flags, appDomain, handle) : HResults.E_NOTIMPL;
int IXCLRDataModule.EnumMethodInstanceByName(ulong* handle, out IXCLRDataMethodInstance? method)
{
method = default;
return _legacyModule is not null ? _legacyModule.EnumMethodInstanceByName(handle, out method) : HResults.E_NOTIMPL;
}
int IXCLRDataModule.EnumMethodInstanceByName(ulong* handle, DacComNullableByRef<IXCLRDataMethodInstance> method)
=> _legacyModule is not null ? _legacyModule.EnumMethodInstanceByName(handle, method) : HResults.E_NOTIMPL;
int IXCLRDataModule.EndEnumMethodInstancesByName(ulong handle)
=> _legacyModule is not null ? _legacyModule.EndEnumMethodInstancesByName(handle) : HResults.E_NOTIMPL;

int IXCLRDataModule.GetMethodDefinitionByToken(/*mdMethodDef*/ uint token, /*IXCLRDataMethodDefinition*/ void** methodDefinition)
int IXCLRDataModule.GetMethodDefinitionByToken(/*mdMethodDef*/ uint token, DacComNullableByRef<IXCLRDataMethodDefinition> methodDefinition)
=> _legacyModule is not null ? _legacyModule.GetMethodDefinitionByToken(token, methodDefinition) : HResults.E_NOTIMPL;

int IXCLRDataModule.StartEnumDataByName(char* name, uint flags, /*IXCLRDataAppDomain*/ void* appDomain, /*IXCLRDataTask*/ void* tlsTask, ulong* handle)
int IXCLRDataModule.StartEnumDataByName(char* name, uint flags, IXCLRDataAppDomain? appDomain, IXCLRDataTask? tlsTask, ulong* handle)
=> _legacyModule is not null ? _legacyModule.StartEnumDataByName(name, flags, appDomain, tlsTask, handle) : HResults.E_NOTIMPL;
int IXCLRDataModule.EnumDataByName(ulong* handle, /*IXCLRDataValue*/ void** value)
int IXCLRDataModule.EnumDataByName(ulong* handle, DacComNullableByRef<IXCLRDataValue> value)
=> _legacyModule is not null ? _legacyModule.EnumDataByName(handle, value) : HResults.E_NOTIMPL;
int IXCLRDataModule.EndEnumDataByName(ulong handle)
=> _legacyModule is not null ? _legacyModule.EndEnumDataByName(handle) : HResults.E_NOTIMPL;
Expand Down
9 changes: 5 additions & 4 deletions src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataStackWalk.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -84,25 +84,26 @@ int IXCLRDataStackWalk.GetContext(uint contextFlags, uint contextBufSize, uint*
return hr;
}

int IXCLRDataStackWalk.GetFrame(out IXCLRDataFrame? frame)
int IXCLRDataStackWalk.GetFrame(DacComNullableByRef<IXCLRDataFrame> frame)
{
int hr = HResults.S_OK;
frame = default;

IXCLRDataFrame? legacyFrame = null;
if (_legacyImpl is not null)
{
int hrLocal = _legacyImpl.GetFrame(out legacyFrame);
DacComNullableByRef<IXCLRDataFrame> legacyFrameOut = new(isNullRef: false);
int hrLocal = _legacyImpl.GetFrame(legacyFrameOut);
if (hrLocal < 0)
return hrLocal;
legacyFrame = legacyFrameOut.Interface;
}

try
{
if (!_currentFrameIsValid)
throw new ArgumentException();

frame = new ClrDataFrame(_target, _dataFrames.Current, legacyFrame);
frame.Interface = new ClrDataFrame(_target, _dataFrames.Current, legacyFrame);
}
catch (System.Exception ex)
{
Expand Down
21 changes: 11 additions & 10 deletions src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/ClrDataTask.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -23,20 +23,21 @@ public ClrDataTask(TargetPointer address, Target target, IXCLRDataTask? legacyIm

int IXCLRDataTask.GetProcess(/*IXCLRDataProcess*/ void** process)
=> _legacyImpl is not null ? _legacyImpl.GetProcess(process) : HResults.E_NOTIMPL;
int IXCLRDataTask.GetCurrentAppDomain(out IXCLRDataAppDomain? appDomain)
int IXCLRDataTask.GetCurrentAppDomain(DacComNullableByRef<IXCLRDataAppDomain> appDomain)
{
int hr = HResults.S_OK, hrLocal = HResults.S_OK;
appDomain = null;
IXCLRDataAppDomain? legacyAppDomain = null;

if (_legacyImpl is not null)
{
hrLocal = _legacyImpl.GetCurrentAppDomain(out legacyAppDomain);
DacComNullableByRef<IXCLRDataAppDomain> legacyOut = new(isNullRef: false);
hrLocal = _legacyImpl.GetCurrentAppDomain(legacyOut);
legacyAppDomain = legacyOut.Interface;
}
try
{
TargetPointer currentAppDomain = _target.ReadPointer(_target.ReadGlobalPointer(Constants.Globals.AppDomain));
appDomain = new ClrDataAppDomain(currentAppDomain, legacyAppDomain);
appDomain.Interface = new ClrDataAppDomain(currentAppDomain, legacyAppDomain);
}
catch (System.Exception ex)
{
Expand All @@ -56,30 +57,30 @@ int IXCLRDataTask.GetFlags(uint* flags)
=> _legacyImpl is not null ? _legacyImpl.GetFlags(flags) : HResults.E_NOTIMPL;
int IXCLRDataTask.IsSameObject(IXCLRDataTask* task)
=> _legacyImpl is not null ? _legacyImpl.IsSameObject(task) : HResults.E_NOTIMPL;
int IXCLRDataTask.GetManagedObject(/*IXCLRDataValue*/ void** value)
int IXCLRDataTask.GetManagedObject(DacComNullableByRef<IXCLRDataValue> value)
=> _legacyImpl is not null ? _legacyImpl.GetManagedObject(value) : HResults.E_NOTIMPL;
int IXCLRDataTask.GetDesiredExecutionState(uint* state)
=> _legacyImpl is not null ? _legacyImpl.GetDesiredExecutionState(state) : HResults.E_NOTIMPL;
int IXCLRDataTask.SetDesiredExecutionState(uint state)
=> _legacyImpl is not null ? _legacyImpl.SetDesiredExecutionState(state) : HResults.E_NOTIMPL;

int IXCLRDataTask.CreateStackWalk(uint flags, out IXCLRDataStackWalk? stackWalk)
int IXCLRDataTask.CreateStackWalk(uint flags, DacComNullableByRef<IXCLRDataStackWalk> stackWalk)
{
stackWalk = default;

Contracts.ThreadData threadData = _target.Contracts.Thread.GetThreadData(_address);
if (threadData.State.HasFlag(Contracts.ThreadState.Unstarted))
return HResults.E_FAIL;

IXCLRDataStackWalk? legacyStackWalk = null;
if (_legacyImpl is not null)
{
int hr = _legacyImpl.CreateStackWalk(flags, out legacyStackWalk);
DacComNullableByRef<IXCLRDataStackWalk> legacyStackWalkOut = new(isNullRef: false);
int hr = _legacyImpl.CreateStackWalk(flags, legacyStackWalkOut);
if (hr < 0)
return hr;
legacyStackWalk = legacyStackWalkOut.Interface;
}

stackWalk = new ClrDataStackWalk(_address, flags, _target, legacyStackWalk);
stackWalk.Interface = new ClrDataStackWalk(_address, flags, _target, legacyStackWalk);
return HResults.S_OK;
}

Expand Down
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