IHostMAlloc::DebugAlloc Method

Artikkeli
09/15/2021

Requests that the host allocate the specified amount of memory from the heap, and additionally track where the memory was allocated.

Syntax

HRESULT DebugAlloc (  
    [in]  SIZE_T  cbSize,
    [in]  EMemoryCriticalLevel dwCriticalLevel,
    [in]  char*   pszFileName,
    [in]  int     iLineNo,
    [out] void**  ppMem  
);

Parameters

cbSize
[in] The size, in bytes, of the current memory allocation request.

dwCriticalLevel
[in] One of the EMemoryCriticalLevel values, indicating the impact of an allocation failure.

pszFileName
[in] The code file of the executable being debugged.

iLineNo
[in] The line number in pszFileName where the allocation was requested.

ppMem
[out] A pointer to the allocated memory, or null if the request could not be completed.

Return Value

HRESULT	Description
S_OK	`DebugAlloc` returned successfully.
HOST_E_CLRNOTAVAILABLE	The 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.
E_OUTOFMEMORY	Not enough memory was available to complete the allocation request.

Remarks

The CLR gets an interface pointer to an IHostMalloc instance by calling the IHostMemoryManager::CreateMalloc method. DebugAlloc allows the runtime to get code file information for use during debugging.

Requirements

Platforms: See System Requirements.

Header: MSCorEE.h

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: Available since 2.0

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