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IDebugComPlusSymbolProvider::GetTypeFromAddress

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Applies to: yesVisual Studio noVisual Studio for Mac

Note

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Retrieves to a symbol type given its debug address.

Syntax

HRESULT GetTypeFromAddress(
    IDebugAddress* pAddress,
    IDebugField**  ppField
);

int GetTypeFromAddress(
    IDebugAddress   pAddress,
    out IDebugField ppField
);

Parameters

pAddress
[in] The debug address that is represented by an IDebugAddress interface.

ppField
[out] Returns the array type as it is represented by an IDebugClassField interface.

Return Value

If successful, returns S_OK; otherwise, returns an error code.

Example

The following example shows how to implement this method for a CDebugSymbolProvider object that exposes the IDebugComPlusSymbolProvider interface.

HRESULT CDebugSymbolProvider::GetTypeFromAddress(
    IDebugAddress *pAddress,
    IDebugField **ppField)
{
    HRESULT hr = E_FAIL;
    CDEBUG_ADDRESS da;
    CDebugGenericParamScope* pGenScope = NULL;

    METHOD_ENTRY( CDebugDynamicFieldSymbol::GetTypeFromPrimitive );

    ASSERT(IsValidObjectPtr(this, CDebugSymbolProvider));
    ASSERT(IsValidWritePtr(ppField, IDebugField*));

    IfFailGo( pAddress->GetAddress(&da) );

    switch ( da.addr.dwKind )
    {
        case ADDRESS_KIND_METADATA_LOCAL:
        case ADDRESS_KIND_METADATA_PARAM:
        case ADDRESS_KIND_METADATA_FIELD:
        case ADDRESS_KIND_METADATA_ARRAYELEM:
        case ADDRESS_KIND_METADATA_METHOD:
            {
                IfFailGo( this->CreateClassType(da.GetModule(), da.tokClass, ppField) );
                break;
            }

        case ADDRESS_KIND_METADATA_RETVAL:
            {
                if ( da.addr.addr.addrRetVal.dwCorType )
                {

                    IfNullGo( pGenScope = new CDebugGenericParamScope(da.GetModule(), da.tokClass, da.GetMethod()), E_OUTOFMEMORY );
                    IfFailGo( this->CreateType((const COR_SIGNATURE*)(&da.addr.addr.addrRetVal.rgSig),
                                               da.addr.addr.addrRetVal.dwSigSize,
                                               da.GetModule(),
                                               mdMethodDefNil,
                                               pGenScope,
                                               ppField) );
                }
                else
                {
                    IfFailGo( this->CreateClassType(da.GetModule(), da.tokClass, ppField) );
                }

                break;
            }

        default:
            {
                ASSERT(!"Address type not supported.");
            }
    }

Error:

    METHOD_EXIT( CDebugDynamicFieldSymbol::GetTypeFromPrimitive, hr );

    RELEASE( pGenScope );

    return hr;
}

See also