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core: avoid possible reordering bugs wth tx/bloch hash cache

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moneromooo-monero 2017-03-25 09:18:53 +00:00
parent 11e24bb2ba
commit 6d315459b6
No known key found for this signature in database
GPG Key ID: 686F07454D6CEFC3
4 changed files with 45 additions and 31 deletions
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40
src/cryptonote_basic/cryptonote_basic.h
View File

@ -35,6 +35,7 @@
#include <vector>
#include <cstring> // memcmp
#include <sstream>
#include <atomic>
#include "serialization/serialization.h"
#include "serialization/variant.h"
#include "serialization/vector.h"
@ -186,6 +187,11 @@ namespace cryptonote
class transaction: public transaction_prefix
{
private:
// hash cash
mutable std::atomic<bool> hash_valid;
mutable std::atomic<bool> blob_size_valid;
public:
std::vector<std::vector<crypto::signature> > signatures; //count signatures always the same as inputs count
rct::rctSig rct_signatures;
@ -193,19 +199,23 @@ namespace cryptonote
// hash cash
mutable crypto::hash hash;
mutable size_t blob_size;
mutable bool hash_valid;
mutable bool blob_size_valid;
transaction();
transaction(const transaction &t): transaction_prefix(t), hash_valid(false), blob_size_valid(false), signatures(t.signatures), rct_signatures(t.rct_signatures) { if (t.is_hash_valid()) { hash = t.hash; set_hash_valid(true); } if (t.is_blob_size_valid()) { blob_size = t.blob_size; set_blob_size_valid(true); } }
transaction &operator=(const transaction &t) { transaction_prefix::operator=(t); set_hash_valid(false); set_blob_size_valid(false); signatures = t.signatures; rct_signatures = t.rct_signatures; if (t.is_hash_valid()) { hash = t.hash; set_hash_valid(true); } if (t.is_blob_size_valid()) { blob_size = t.blob_size; set_blob_size_valid(true); } return *this; }
virtual ~transaction();
void set_null();
void invalidate_hashes();
bool is_hash_valid() const { return hash_valid.load(std::memory_order_acquire); }
void set_hash_valid(bool v) const { hash_valid.store(v,std::memory_order_release); }
bool is_blob_size_valid() const { return hash_valid.load(std::memory_order_acquire); }
void set_blob_size_valid(bool v) const { blob_size_valid.store(v,std::memory_order_release); }
BEGIN_SERIALIZE_OBJECT()
if (!typename Archive<W>::is_saving())
{
hash_valid = false;
blob_size_valid = false;
set_hash_valid(false);
set_blob_size_valid(false);
}
FIELDS(*static_cast<transaction_prefix *>(this))
@ -312,15 +322,15 @@ namespace cryptonote
extra.clear();
signatures.clear();
rct_signatures.type = rct::RCTTypeNull;
hash_valid = false;
blob_size_valid = false;
set_hash_valid(false);
set_blob_size_valid(false);
}
inline
void transaction::invalidate_hashes()
{
hash_valid = false;
blob_size_valid = false;
set_hash_valid(false);
set_blob_size_valid(false);
}
inline
@ -361,19 +371,27 @@ namespace cryptonote
struct block: public block_header
{
private:
// hash cash
mutable std::atomic<bool> hash_valid;
public:
block(): block_header(), hash_valid(false) {}
void invalidate_hashes() { hash_valid = false; }
block(const block &b): block_header(b), hash_valid(false), miner_tx(b.miner_tx), tx_hashes(b.tx_hashes) { if (b.is_hash_valid()) { hash = b.hash; set_hash_valid(true); } }
block &operator=(const block &b) { block_header::operator=(b); hash_valid = false; miner_tx = b.miner_tx; tx_hashes = b.tx_hashes; if (b.is_hash_valid()) { hash = b.hash; set_hash_valid(true); } return *this; }
void invalidate_hashes() { set_hash_valid(false); }
bool is_hash_valid() const { return hash_valid.load(std::memory_order_acquire); }
void set_hash_valid(bool v) const { hash_valid.store(v,std::memory_order_release); }
transaction miner_tx;
std::vector<crypto::hash> tx_hashes;
// hash cash
mutable crypto::hash hash;
mutable bool hash_valid;
BEGIN_SERIALIZE_OBJECT()
if (!typename Archive<W>::is_saving())
hash_valid = false;
set_hash_valid(false);
FIELDS(*static_cast<block_header *>(this))
FIELD(miner_tx)

26
src/cryptonote_basic/cryptonote_format_utils.cpp
View File

@ -100,8 +100,7 @@ namespace cryptonote
binary_archive<false> ba(ss);
bool r = ::serialization::serialize(ba, tx);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse transaction from blob");
tx.hash_valid = false;
tx.blob_size_valid = false;
tx.invalidate_hashes();
return true;
}
//---------------------------------------------------------------
@ -122,8 +121,7 @@ namespace cryptonote
binary_archive<false> ba(ss);
bool r = ::serialization::serialize(ba, tx);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse transaction from blob");
tx.hash_valid = false;
tx.blob_size_valid = false;
tx.invalidate_hashes();
//TODO: validate tx
get_transaction_hash(tx, tx_hash);
@ -660,7 +658,7 @@ namespace cryptonote
//---------------------------------------------------------------
bool get_transaction_hash(const transaction& t, crypto::hash& res, size_t* blob_size)
{
if (t.hash_valid)
if (t.is_hash_valid())
{
#ifdef ENABLE_HASH_CASH_INTEGRITY_CHECK
CHECK_AND_ASSERT_THROW_MES(!calculate_transaction_hash(t, res, blob_size) || t.hash == res, "tx hash cash integrity failure");
@ -668,10 +666,10 @@ namespace cryptonote
res = t.hash;
if (blob_size)
{
if (!t.blob_size_valid)
if (!t.is_blob_size_valid())
{
t.blob_size = get_object_blobsize(t);
t.blob_size_valid = true;
t.set_blob_size_valid(true);
}
*blob_size = t.blob_size;
}
@ -683,11 +681,11 @@ namespace cryptonote
if (!ret)
return false;
t.hash = res;
t.hash_valid = true;
t.set_hash_valid(true);
if (blob_size)
{
t.blob_size = *blob_size;
t.blob_size_valid = true;
t.set_blob_size_valid(true);
}
return true;
}
@ -735,7 +733,7 @@ namespace cryptonote
//---------------------------------------------------------------
bool get_block_hash(const block& b, crypto::hash& res)
{
if (b.hash_valid)
if (b.is_hash_valid())
{
#ifdef ENABLE_HASH_CASH_INTEGRITY_CHECK
CHECK_AND_ASSERT_THROW_MES(!calculate_block_hash(b, res) || b.hash == res, "block hash cash integrity failure");
@ -749,7 +747,7 @@ namespace cryptonote
if (!ret)
return false;
b.hash = res;
b.hash_valid = true;
b.set_hash_valid(true);
return true;
}
//---------------------------------------------------------------
@ -769,7 +767,6 @@ namespace cryptonote
string_tools::hex_to_pod(longhash_202612, res);
return true;
}
block b_local = b; //workaround to avoid const errors with do_serialize
blobdata bd = get_block_hashing_blob(b);
crypto::cn_slow_hash(bd.data(), bd.size(), res);
return true;
@ -809,9 +806,8 @@ namespace cryptonote
binary_archive<false> ba(ss);
bool r = ::serialization::serialize(ba, b);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse block from blob");
b.hash_valid = false;
b.miner_tx.hash_valid = false;
b.miner_tx.blob_size_valid = false;
b.invalidate_hashes();
b.miner_tx.invalidate_hashes();
return true;
}
//---------------------------------------------------------------

4
src/cryptonote_basic/miner.cpp
View File

@ -355,11 +355,11 @@ namespace cryptonote
if(check_hash(h, diffic))
{
bl.hash_valid = false;
bl.invalidate_hashes();
return true;
}
}
bl.hash_valid = false;
bl.invalidate_hashes();
return false;
}
//-----------------------------------------------------------------------------------------------------

6
src/cryptonote_core/cryptonote_tx_utils.cpp
View File

@ -133,7 +133,7 @@ namespace cryptonote
tx.unlock_time = height + CRYPTONOTE_MINED_MONEY_UNLOCK_WINDOW;
tx.vin.push_back(in);
tx.hash_valid = tx.blob_size_valid = false;
tx.invalidate_hashes();
//LOG_PRINT("MINER_TX generated ok, block_reward=" << print_money(block_reward) << "(" << print_money(block_reward - fee) << "+" << print_money(fee)
// << "), current_block_size=" << current_block_size << ", already_generated_coins=" << already_generated_coins << ", tx_id=" << get_transaction_hash(tx), LOG_LEVEL_2);
@ -454,7 +454,7 @@ namespace cryptonote
MCINFO("construct_tx", "transaction_created: " << get_transaction_hash(tx) << ENDL << obj_to_json_str(tx) << ENDL);
}
tx.hash_valid = tx.blob_size_valid = false;
tx.invalidate_hashes();
return true;
}
@ -492,7 +492,7 @@ namespace cryptonote
bl.timestamp = 0;
bl.nonce = nonce;
miner::find_nonce_for_given_block(bl, 1, 0);
bl.hash_valid = false;
bl.invalidate_hashes();
return true;
}
//---------------------------------------------------------------