Quote from: uchalkql on April 21, 2017, 01:37:35 AM

Thank you 2112 and gmaxwell!

The variable BlockMap mapBlockIndex is defined in validation.cpp

I couldn't find where it is initialized.

There is only a comment here:
https://github.com/bitcoin/bitcoin/blob/86ea3c2ff247bb2ba0fb50013c8ecdbaf8a9fe8f/src/txdb.cpp

Code:

// Load mapBlockIndex
while (pcursor->Valid()) {

I think I found, it is here right?

-- txdb.cpp

CBlockIndex* pindexNew = insertBlockIndex(diskindex.GetBlockHash());

-- validation.cpp

CBlockIndex * InsertBlockIndex(uint256 hash)
{
   if (hash.IsNull())
   return NULL;

   // Return existing
   BlockMap::iterator mi = mapBlockIndex.find(hash);
   if (mi != mapBlockIndex.end())
   return (*mi).second;

   // Create new
   CBlockIndex* pindexNew = new CBlockIndex();
   if (!pindexNew)
   throw std::runtime_error(std::string(__func__) + ": new CBlockIndex failed");
   mi = mapBlockIndex.insert(std::make_pair(hash, pindexNew)).first;
   pindexNew->phashBlock = &((*mi).first);

   return pindexNew;
}