pre-touch all pages before zip

Author: hackerby888

src/extensions/k12_engine.h

@@ -662,6 +662,16 @@ class ContractStateEngine : public K12Engine
         madvise(_state + startOffset, len, MADV_DONTNEED); // remove only PTE mappings, all our data still safe. next read will trigger minor fault
     }
 
+    unsigned long long touchAllPages()
+    {
+        unsigned long long sum = 0;
+        for (size_t offset = 0; offset < paddedSize; offset += SYSTEM_PAGE_SIZE)
+        {
+            sum += _state[offset];
+        }
+        return sum;
+    }
+
     int getHashAndReprotect(unsigned char* output, size_t outputByteLen)
     {
         int res = getHash(output, outputByteLen);

src/qubic.cpp

@@ -6519,6 +6519,7 @@ static bool saveContractStateFiles(CHAR16* directory)
         CONTRACT_FILE_NAME[sizeof(CONTRACT_FILE_NAME) / sizeof(CONTRACT_FILE_NAME[0]) - 7] = (contractIndex % 100) / 10 + L'0';
         CONTRACT_FILE_NAME[sizeof(CONTRACT_FILE_NAME) / sizeof(CONTRACT_FILE_NAME[0]) - 6] = contractIndex % 10 + L'0';
         contractStateLock[contractIndex].acquireRead();
+        ContractStateEngine::getEngine(contractIndex)->touchAllPages();
         savedSize = save(CONTRACT_FILE_NAME, contractDescriptions[contractIndex].stateSize, contractStates[contractIndex], directory, isLoadedFromSnapshot);
         contractStateLock[contractIndex].releaseRead();
         totalSize += savedSize;