Function ExtendMemory

NULLC/Executor_X86.cpp:77–123

#ifndef __linux
	int ExtendMemory()
	{
		// External stack cannot be extended, end execution with error
		if(!stackManaged)
		{
			expAllocCode = 5;
			return EXCEPTION_EXECUTE_HANDLER;
		}
		if(stackEndAddress && (char*)stackBaseAddress + commitedStack + stackGrowSize > (char*)stackEndAddress)
		{
			expAllocCode = 2;
			return EXCEPTION_EXECUTE_HANDLER;
		}
		// Check that we haven't exceeded available memory
		if(reservedStack > 512*1024*1024)
		{
			expAllocCode = 4;
			return EXCEPTION_EXECUTE_HANDLER;
		}
		// Allow the use of last reserved memory page
		if(!VirtualAlloc(reinterpret_cast<void*>(long long(paramDataBase+commitedStack)), stackGrowSize-stackGrowCommit, MEM_COMMIT, PAGE_READWRITE))
		{
			expAllocCode = 1; // failed to commit all old memory
			return EXCEPTION_EXECUTE_HANDLER;
		}
		// Reserve new memory right after the block
		if(!VirtualAlloc(reinterpret_cast<void*>(long long(paramDataBase+reservedStack)), stackGrowSize, MEM_RESERVE, PAGE_NOACCESS))
		{
			expAllocCode = 2; // failed to reserve new memory
			return EXCEPTION_EXECUTE_HANDLER;
		}
		// Allow access to all new reserved memory, except for the last memory page
		if(!VirtualAlloc(reinterpret_cast<void*>(long long(paramDataBase+reservedStack)), stackGrowCommit, MEM_COMMIT, PAGE_READWRITE))
		{
			expAllocCode = 3; // failed to commit new memory
			return EXCEPTION_EXECUTE_HANDLER;
		}
		// Update variables
		commitedStack = reservedStack;
		reservedStack += stackGrowSize;
		commitedStack += stackGrowCommit;
		stackReallocs++;

		SetUnmanagableRange(parameterHead, reservedStack);

		return (DWORD)EXCEPTION_CONTINUE_EXECUTION;
	}

	DWORD CanWeHandleSEH(unsigned int expCode, _EXCEPTION_POINTERS* expInfo)
	{