linux-sgx-trts-modified/sdk/cpprt/memory_manage/new3.cpp

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#include <stdlib.h>
#include <new>
#include "sgx_defs.h"
#include "sgx_trts.h"
#include "internal/util.h"

//placement version
//that does not allocate memory - it simply returns ptr.
//Notice though that the constructor for the object (if any) will still be called by the operator expression.
SGX_WEAK void* SGXAPI operator new (size_t dwBytes, void* ptr)
{
	if( !sgx_is_within_enclave(ptr, dwBytes) ){
		//compiler will check the pointer before call object construct, so it is OK to return NULL here
		return NULL;
	}
	return ptr;
}