libraries/ltkutils/src/proxyallocatorhelper.cpp
author Tom Sutcliffe <thomas.sutcliffe@accenture.com>
Wed, 23 Jun 2010 15:52:26 +0100
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// proxyallocatorhelper.cpp
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// 
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// Copyright (c) 2010 Accenture. All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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// 
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// Initial Contributors:
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// Accenture - Initial contribution
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//
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#include <fshell/heaputils.h>
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#include <fshell/common.mmh>
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#include <fshell/ltkutils.h>
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__ASSERT_COMPILE(sizeof(LtkUtils::RProxyAllocatorHelper) == 11*4);
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#ifdef FSHELL_MEMORY_ACCESS_SUPPORT
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#include <fshell/memoryaccess.h>
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#endif
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EXPORT_C LtkUtils::RProxyAllocatorHelper::RProxyAllocatorHelper()
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	: RAllocatorHelper()
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	{
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	}
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EXPORT_C TInt LtkUtils::RProxyAllocatorHelper::Open(RMemoryAccess& aMem, TUint aThreadId)
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	{
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	iMemoryAccess = &aMem;
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	iThreadId = aThreadId;
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#ifdef FSHELL_MEMORY_ACCESS_SUPPORT
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	TUint8* allocatorAddress;
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	TInt err = iMemoryAccess->GetAllocatorAddress(iThreadId, allocatorAddress);
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	if (!err)
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		{
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		iAllocatorAddress = (TLinAddr)allocatorAddress;
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		TInt udeb = EuserIsUdeb();
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		if (udeb < 0) return udeb; // error
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		err = IdentifyAllocatorType(udeb);
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		}
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	return err;
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#else
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	return KErrNotSupported;
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#endif
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	}
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EXPORT_C TInt LtkUtils::RProxyAllocatorHelper::OpenChunkHeap(RMemoryAccess& aMem, TAny* aDChunkPtr)
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	{
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#ifdef FSHELL_MEMORY_ACCESS_SUPPORT
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	iMemoryAccess = &aMem;
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	TChunkKernelInfo chunkInfo;
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	TPckg<TChunkKernelInfo> chunkInfoPckg(chunkInfo);
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	TInt err = iMemoryAccess->GetObjectInfo(EChunk, (TUint8*)aDChunkPtr, chunkInfoPckg);
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	if (err) return err;
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	RProcess process;
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	err = process.Open(chunkInfo.iControllingOwnerProcessId);
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	if (err == KErrNone)
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		{
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		TPckgBuf<TProcessKernelInfo> processInfo;
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		err = iMemoryAccess->GetObjectInfoByHandle(EProcess, RThread().Id(), process.Handle(), processInfo);
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		process.Close();
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		if (err == KErrNone)
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			{
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			iThreadId = processInfo().iFirstThreadId;
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			return RAllocatorHelper::OpenChunkHeap((TLinAddr)chunkInfo.iBase, chunkInfo.iMaxSize);
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			}
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		}
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	return err;
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#else
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	(void)aMem;
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	(void)aDChunkPtr;
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	return KErrNotSupported;
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#endif
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	}
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TInt LtkUtils::RProxyAllocatorHelper::ReadData(TLinAddr aLocation, TAny* aResult, TInt aSize) const
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	{
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#ifdef FSHELL_MEMORY_ACCESS_SUPPORT
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	TThreadMemoryAccessParams params;
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	params.iId = iThreadId;
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	params.iAddr = (TUint8*)aLocation;
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	params.iSize = aSize;
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	TPtr8 ptr((TUint8*)aResult, aSize, aSize);
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	return iMemoryAccess->GetThreadMem(params, ptr);
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#else
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	return KErrNotSupported;
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#endif
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	}
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TInt LtkUtils::RProxyAllocatorHelper::WriteData(TLinAddr aLocation, const TAny* aData, TInt aSize)
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	{
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#ifdef FSHELL_MEMORY_ACCESS_SUPPORT
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	const TPtrC8 ptr((const TUint8*)aData, aSize);
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	return iMemoryAccess->WriteMem(iThreadId, ptr, (TAny*)aLocation);
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#else
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	return KErrNotSupported;
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#endif
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	}
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TInt LtkUtils::RProxyAllocatorHelper::TryLock()
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	{
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	return KErrNotSupported;
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	}
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void LtkUtils::RProxyAllocatorHelper::TryUnlock()
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	{
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	// Not supported
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	}
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EXPORT_C void LtkUtils::RProxyAllocatorHelper::Close()
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	{
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	iMemoryAccess = NULL;
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	iThreadId = 0;
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	RAllocatorHelper::Close();
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	}