IDataModelManager2::CreateTypedObject method (dbgmodel.h)

Article
02/22/2024

The CreateTypedObject method is the method which allows a client to create a representation of a native/language object in the address space of a debug target. If the type of the newly created object (as indicated by the objectType argument) happens to match one or more type signatures registered with the data model manager as either canonical visualizers or extensions, those matching data models will automatically be attached to the created instance object before it is returned to the caller.

Syntax

HRESULT CreateTypedObject(
  IDebugHostContext           *context,
  Location                    objectLocation,
  IDebugHostType              *objectType,
  _COM_Errorptr_ IModelObject **object
);

Parameters

context

The debug host context in which this object is located. If no explicit context is given, the context of the newly created object will inherit from the context of the objectType argument. A caller can pass the special marker value USE_CURRENT_HOST_CONTEXT to indicate that the object should receive the context which is current in the debugger's user interface.

objectLocation

The location of the object in the address space of the debug target. If the location is a virtual address, the location can be constructed by the client using a 64-bit offset into the address space; otherwise - the location must be retrieved from another debug host interface.

objectType

The type of the object being constructed. The context of the type will propagate to the newly created object if no explicit context is passed in the context argument.

object

The newly created object will be returned here.

Return value

This method returns HRESULT that indicates success or failure.

Remarks

Sample Code

// As an example, create an instance of nt!_EPROCESS at address 0x100
ComPtr<IDebugHost> spHost;           /* get the host */
ComPtr<IDataModelManager> spManager; /* get the data model manager */

ComPtr<IDebugHostSymbols> spSym;
if (SUCCEEDED(spHost.As(&spSym)))
{
    // Find a context in which to query.  This queries the current *UI* 
    // context.  You can fetch the context from a process or something 
    // else to query within a specific process.
    ComPtr<IDebugHostModule> spNtModule;
    if (SUCCEEDED(spSym->FindModuleByName(USE_CURRENT_HOST_CONTEXT, 
                                          L"nt", 
                                          &spNtModule)))
    {
        ComPtr<IDebugHostType> spEProcessType;
        if (SUCCEEDED(spNtModule->FindTypeByName(L"_EPROCESS", &spEProcessType)))
        {
            Location creationLocation = 0x100;
            ComPtr<IModelObject> spProcess;
            if (SUCCEEDED(spManager->CreateTypedObject(nullptr, 
                                                       creationLocation,
                                                       spEProcessType.Get(),
                                                       &spProcess)))
            {
                // spProcess is now the _EPROCESS at address 0x100
                // You can get fields, etc... through standard IModelObject methods
            }
        }
    }
}

IDataModelManager2 interface

Requirements

Requirement	Value
Header	dbgmodel.h

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