IDebugDataSpaces::WriteVirtualUncached method (dbgeng.h)

Article
02/22/2024

The WriteVirtualUncached method writes data to the target's virtual address space.

Syntax

HRESULT WriteVirtualUncached(
  [in]            ULONG64 Offset,
  [in]            PVOID   Buffer,
  [in]            ULONG   BufferSize,
  [out, optional] PULONG  BytesWritten
);

Parameters

[in] Offset

Specifies the location in the target's virtual address space to be written.

[in] Buffer

Specifies the buffer to write the memory from.

[in] BufferSize

Specifies the size in bytes of the buffer. This is also the number of bytes requested to be written.

[out, optional] BytesWritten

Receives the number of bytes that were actually written. If it is set to NULL, this information is not returned.

Return value

This method can also return error values. See Return Values for more details.

Return code	Description
S_OK	The method was at least partially successful. BytesWritten indicates the number of bytes successfully written, which may be less than BufferSize.

Remarks

This method writes the buffer to the memory in the target's virtual address space.

This method behaves identically to WriteVirtual, except that it avoids using the virtual memory cache. It is therefore useful for reading inherently volatile virtual memory, such as memory-mapped device areas, without contaminating or invalidating the cache.

Requirements

Requirement	Value
Target Platform	Desktop
Header	dbgeng.h (include Dbgeng.h)