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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//*****************************************************************************
// DataTargetAdapter.cpp
//
//
// implementation of compatibility adapter for ICLRDataTarget
//*****************************************************************************
#include "stdafx.h"
#include "datatargetadapter.h"
#include <clrdata.h>
#include "dacimpl.h"
#ifndef IMAGE_FILE_MACHINE_ARM64
#define IMAGE_FILE_MACHINE_ARM64 0xAA64 // ARM64 Little-Endian
#endif
//
// DataTargetAdaptor ctor
//
// Instantiate a DataTargetAdapter over the supplied legacy DataTarget interface.
// Takes a ref on the supplied interface and releases it in our dtor.
//
DataTargetAdapter::DataTargetAdapter(ICLRDataTarget * pLegacyTarget) :
m_ref(0),
m_pLegacyTarget(pLegacyTarget)
{
m_pLegacyTarget->AddRef();
}
//
// DataTargetAdapter dtor
//
// Releases the underlying DataTarget interface
//
DataTargetAdapter::~DataTargetAdapter()
{
m_pLegacyTarget->Release();
}
// Standard impl of IUnknown::QueryInterface
HRESULT STDMETHODCALLTYPE
DataTargetAdapter::QueryInterface(
REFIID interfaceId,
PVOID* pInterface)
{
if (interfaceId == IID_IUnknown)
{
*pInterface = static_cast<IUnknown *>(static_cast<ICorDebugDataTarget *>(this));
}
else if (interfaceId == IID_ICorDebugDataTarget)
{
*pInterface = static_cast<ICorDebugDataTarget *>(this);
}
else if (interfaceId == IID_ICorDebugMutableDataTarget)
{
// Note that we always implement the mutable interface, even though our underlying target
// may return E_NOTIMPL for all the functions on this interface. There is no reliable way
// to tell apriori whether an ICLRDataTarget instance supports writing or not.
*pInterface = static_cast<ICorDebugMutableDataTarget *>(this);
}
else
{
// For ICorDebugDataTarget4 and other interfaces directly implemented by the legacy data target.
return m_pLegacyTarget->QueryInterface(interfaceId, pInterface);
}
AddRef();
return S_OK;
}
// Standard impl of IUnknown::AddRef
ULONG STDMETHODCALLTYPE
DataTargetAdapter::AddRef()
{
LONG ref = InterlockedIncrement(&m_ref);
return ref;
}
// Standard impl of IUnknown::Release
ULONG STDMETHODCALLTYPE
DataTargetAdapter::Release()
{
SUPPORTS_DAC_HOST_ONLY;
LONG ref = InterlockedDecrement(&m_ref);
if (ref == 0)
{
delete this;
}
return ref;
}
// impl of interface method ICorDebugDataTarget::GetPlatform
HRESULT STDMETHODCALLTYPE
DataTargetAdapter::GetPlatform(
CorDebugPlatform * pPlatform)
{
SUPPORTS_DAC_HOST_ONLY;
// Get the target machine type, and assume it's Windows
HRESULT hr;
ULONG32 ulMachineType;
IfFailRet(m_pLegacyTarget->GetMachineType(&ulMachineType));
ULONG32 ulExpectedPointerSize;
CorDebugPlatform platform;
switch(ulMachineType)
{
#ifdef FEATURE_PAL
case IMAGE_FILE_MACHINE_I386:
ulExpectedPointerSize = 4;
platform = CORDB_PLATFORM_POSIX_X86;
break;
case IMAGE_FILE_MACHINE_AMD64:
ulExpectedPointerSize = 8;
platform = CORDB_PLATFORM_POSIX_AMD64;
break;
case IMAGE_FILE_MACHINE_ARMNT:
ulExpectedPointerSize = 4;
platform = CORDB_PLATFORM_POSIX_ARM;
break;
case IMAGE_FILE_MACHINE_IA64:
case IMAGE_FILE_MACHINE_ARM64:
_ASSERTE_MSG(false, "Not supported platform.");
return E_NOTIMPL;
#else // FEATURE_PAL
case IMAGE_FILE_MACHINE_I386:
ulExpectedPointerSize = 4;
platform = CORDB_PLATFORM_WINDOWS_X86;
break;
case IMAGE_FILE_MACHINE_AMD64:
ulExpectedPointerSize = 8;
platform = CORDB_PLATFORM_WINDOWS_AMD64;
break;
case IMAGE_FILE_MACHINE_IA64:
ulExpectedPointerSize = 8;
platform = CORDB_PLATFORM_WINDOWS_IA64;
break;
case IMAGE_FILE_MACHINE_ARMNT:
ulExpectedPointerSize = 4;
platform = CORDB_PLATFORM_WINDOWS_ARM;
break;
case IMAGE_FILE_MACHINE_ARM64:
ulExpectedPointerSize = 8;
platform = CORDB_PLATFORM_WINDOWS_ARM64;
break;
#endif // FEATURE_PAL
default:
// No other platforms are current supported
return E_NOTIMPL;
}
// Validate that the target pointer size matches
ULONG32 ulPointerSize;
IfFailRet(m_pLegacyTarget->GetPointerSize(&ulPointerSize));
if (ulPointerSize != ulExpectedPointerSize)
{
return E_UNEXPECTED;
}
// Found a match
*pPlatform = platform;
return S_OK;
}
// impl of interface method ICorDebugDataTarget::ReadVirtual
HRESULT STDMETHODCALLTYPE
DataTargetAdapter::ReadVirtual(
CORDB_ADDRESS address,
PBYTE pBuffer,
ULONG32 cbRequestSize,
ULONG32 * pcbRead)
{
SUPPORTS_DAC_HOST_ONLY;
CLRDATA_ADDRESS cdAddr = TO_CDADDR(address);
return m_pLegacyTarget->ReadVirtual(cdAddr, pBuffer, cbRequestSize, pcbRead);
}
// impl of interface method ICorDebugMutableDataTarget::WriteVirtual
HRESULT STDMETHODCALLTYPE
DataTargetAdapter::WriteVirtual(
CORDB_ADDRESS address,
const BYTE * pBuffer,
ULONG32 cbRequestSize)
{
SUPPORTS_DAC_HOST_ONLY;
CLRDATA_ADDRESS cdAddr = TO_CDADDR(address);
ULONG32 cbWritten = 0;
HRESULT hr = S_OK;
hr = m_pLegacyTarget->WriteVirtual(cdAddr, const_cast<BYTE *>(pBuffer), cbRequestSize, &cbWritten);
if (SUCCEEDED(hr) && cbWritten != cbRequestSize)
{
// This shouldn't happen - existing data target implementations make writes atomic (eg.
// WriteProcessMemory), even though that isn't strictly required by the old interface.
// If this does happen, we technically leave the process in an inconsistent state, and we make no
// attempt to recover from that here.
_ASSERTE_MSG(false, "Legacy data target WriteVirtual partial write - target left in inconsistent state");
return HRESULT_FROM_WIN32(ERROR_PARTIAL_COPY);
}
return hr;
}
// impl of interface method ICorDebugDataTarget::GetThreadContext
HRESULT STDMETHODCALLTYPE
DataTargetAdapter::GetThreadContext(
DWORD dwThreadID,
ULONG32 contextFlags,
ULONG32 contextSize,
PBYTE pContext)
{
SUPPORTS_DAC_HOST_ONLY;
return m_pLegacyTarget->GetThreadContext(dwThreadID, contextFlags, contextSize, pContext);
}
// impl of interface method ICorDebugMutableDataTarget::SetThreadContext
HRESULT STDMETHODCALLTYPE
DataTargetAdapter::SetThreadContext(
DWORD dwThreadID,
ULONG32 contextSize,
const BYTE * pContext)
{
SUPPORTS_DAC_HOST_ONLY;
return m_pLegacyTarget->SetThreadContext(dwThreadID, contextSize, const_cast<BYTE *>(pContext));
}
// implementation of ICorDebugMutableDataTarget::ContinueStatusChanged
HRESULT STDMETHODCALLTYPE
DataTargetAdapter::ContinueStatusChanged(
DWORD dwThreadId,
CORDB_CONTINUE_STATUS continueStatus)
{
SUPPORTS_DAC_HOST_ONLY;
// No corresponding API in pre-arrowhead ICLRDataTarget* interfaces.
// Note that we briefly had a ICLRDataTarget4 with this API, but this was never released outside the CLR so
// all existing implementations should now be gone.
return E_NOTIMPL;
}
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