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Improved consistency check for block_log

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Peter Conrad 2017-08-04 21:44:56 +02:00 committed by gladcow
parent 95a5b57c4f
commit 0d108fb8ef
1 changed files with 12 additions and 7 deletions
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19
libraries/chain/block_database.cpp
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@ -216,23 +216,28 @@ optional<index_entry> block_database::last_index_entry()const {
if( pos < sizeof(index_entry) )
return optional<index_entry>();
if( pos % sizeof(index_entry) != 0 )
pos -= pos % sizeof(index_entry);
pos -= pos % sizeof(index_entry);
while( e.block_size == 0 && pos > 0 )
_blocks.seekg( 0, _block_num_to_pos.end );
const std::streampos blocks_size = _blocks.tellg();
while( pos >= 0 )
{
pos -= sizeof(index_entry);
_block_num_to_pos.seekg( pos );
_block_num_to_pos.read( (char*)&e, sizeof(e) );
if( e.block_size > 0 )
if( _block_num_to_pos.gcount() == sizeof(e) && e.block_size > 0
&& e.block_pos + e.block_size <= blocks_size )
try
{
vector<char> data( e.block_size );
_blocks.seekg( e.block_pos );
_blocks.read( data.data(), e.block_size );
auto result = fc::raw::unpack<signed_block>(data);
return e;
if( _blocks.gcount() == e.block_size )
{
const signed_block block = fc::raw::unpack<signed_block>(data);
if( block.id() == e.block_id )
return e;
}
}
catch (const fc::exception&)
{