Hey,
I'm trying to call the PBC library in SGX Enclave to implement dynamic memory allocation of a 2D array of type element_t in PBC for use by later programs. Unfortunately, encountered some unknown program exits, so I am already struggling with creating the correct code.
I have configured my SGX 2.0 environment after following the instructions sgx_emm and tested the sgx_mm API successfully. the configuration file is as follows
<EnclaveConfiguration>
<ProdID>0</ProdID>
<ISVSVN>0</ISVSVN>
<TCSNum>3</TCSNum>
<TCSMinPool>1</TCSMinPool>
<TCSPolicy>1</TCSPolicy>
<TCSMaxNum>3</TCSMaxNum>
<StackMaxSize>0x1000000</StackMaxSize>
<StackMinSize>0x10000</StackMinSize>
<HeapMaxSize>0xF0000000</HeapMaxSize>
<HeapInitSize>0x9000</HeapInitSize>
<HeapMinSize>0x08000</HeapMinSize>
<UserRegionSize>0x90000000</UserRegionSize>
<DisableDebug>0</DisableDebug>
<MiscSelect>1</MiscSelect>
<MiscMask>0xFFFFFFFF</MiscMask>
</EnclaveConfiguration>
Now I need to call the PBC crypto library (already compiled lib_tpbc.a in /opt/intel/sgxsdk/lib64) in SGX Enclave to implement the dynamic memory allocation of a 2D array of type element_t, here is my function implementation.
//动态分配二维数组
void initialize_sets(int numSets, int sizeSet)
{
void *addr = 0;
//const size_t ALLOC_SIZE = 0x10000000; // 256M
size_t totalSize = numSets * sizeSet * sizeof(element_t);//1800B
const size_t alignedSize = calculate_aligned_size(totalSize);
int ret = sgx_mm_alloc(NULL, alignedSize, SGX_EMA_COMMIT_NOW, NULL, NULL, &addr);
printf("sgx_mm_alloc = %d\n", ret); //0
e_sets = (element_t **) (&addr);
for (int i = 0; i < numSets; i++)
{
*(e_sets + i) = (element_t *)(addr + i * sizeSet * sizeof(element_t));
for (int j = 0; j < sizeSet; j++)
{
element_init_Zr(e_sets[i][j], pairing);
element_random(e_sets[i][j]);
printf("initilize sets[%d][%d]\n", i, j);
}
}
}
Execute ./app and the result is as follows:
My problem is that even though I call sgx_mm_alloc to allocate large enough memory dynamically, it still can't initialize e_sets correctly, e.g., it can allocate 256M of memory successfully, but when numSets =8, sizeSet=15, alignedSize=4KB, the function can only initialize the array up to e_sets[7][6] and exits, and it doesn't report an error, so it's hard for me to locate the error.
Thanks for your help very much!
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