Share via

IHostMemoryManager::VirtualProtect Method

  • Article

Serves as a logical wrapper for the corresponding Win32 function. The Win32 implementation of VirtualProtect changes the protection on a region of committed pages in the virtual address space of the calling process.

HRESULT VirtualProtect (
    [in]  void*   lpAddress,
    [in]  SIZE_T  dwSize,
    [in]  DWORD   flNewProtect,
    [out] DWORD*  pflOldProtect
);

Parameters

  • lpAddress
    [in] A pointer to the base address of the virtual memory whose protection attributes are to be changed.

  • dwSize
    [in] The size, in bytes, of the region of memory pages to be changed.

  • flNewProtect
    [in] The type of memory protection to apply.

  • pflOldProtect
    [out] A pointer to the previous memory protection value.

Return Value

HRESULT

Description

S_OK

VirtualProtect returned successfully.

HOST_E_CLRNOTAVAILABLE

The common language runtime (CLR) has not been loaded into a process, or the CLR is in a state in which it cannot run managed code or process the call successfully.

HOST_E_TIMEOUT

The call timed out.

HOST_E_NOT_OWNER

The caller does not own the lock.

HOST_E_ABANDONED

An event was canceled while a blocked thread or fiber was waiting on it.

E_FAIL

An unknown catastrophic failure occurred. When a method returns E_FAIL, the CLR is no longer usable within the process. Subsequent calls to hosting methods return HOST_E_CLRNOTAVAILABLE.

Remarks

This implementation of VirtualProtect returns an HRESULT value, while the Win32 implementation returns a non-zero value to indicate success, and a zero value to indicate failure. For more information, see the Windows Platform documentation.

Requirements

Platforms: See .NET Framework System Requirements.

Header: MSCorEE.h

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: 4, 3.5 SP1, 3.5, 3.0 SP1, 3.0, 2.0 SP1, 2.0

See Also

Reference

IHostMemoryManager Interface