diff --git a/core/blockchain.go b/core/blockchain.go index 644df123c52165aa1553a0abb8208fcb57b104e7..53fe7ee2ebb99dcaaf590e9de56bd6e0bca95ef5 100644 --- a/core/blockchain.go +++ b/core/blockchain.go @@ -648,22 +648,21 @@ func (bc *BlockChain) Stop() { bc.wg.Wait() // Ensure the state of a recent block is also stored to disk before exiting. - // It is fine if this state does not exist (fast start/stop cycle), but it is - // advisable to leave an N block gap from the head so 1) a restart loads up - // the last N blocks as sync assistance to remote nodes; 2) a restart during - // a (small) reorg doesn't require deep reprocesses; 3) chain "repair" from - // missing states are constantly tested. - // - // This may be tuned a bit on mainnet if its too annoying to reprocess the last - // N blocks. + // We're writing three different states to catch different restart scenarios: + // - HEAD: So we don't need to reprocess any blocks in the general case + // - HEAD-1: So we don't do large reorgs if our HEAD becomes an uncle + // - HEAD-127: So we have a hard limit on the number of blocks reexecuted if !bc.cacheConfig.Disabled { triedb := bc.stateCache.TrieDB() - if number := bc.CurrentBlock().NumberU64(); number >= triesInMemory { - recent := bc.GetBlockByNumber(bc.CurrentBlock().NumberU64() - triesInMemory + 1) - log.Info("Writing cached state to disk", "block", recent.Number(), "hash", recent.Hash(), "root", recent.Root()) - if err := triedb.Commit(recent.Root(), true); err != nil { - log.Error("Failed to commit recent state trie", "err", err) + for _, offset := range []uint64{0, 1, triesInMemory - 1} { + if number := bc.CurrentBlock().NumberU64(); number > offset { + recent := bc.GetBlockByNumber(number - offset) + + log.Info("Writing cached state to disk", "block", recent.Number(), "hash", recent.Hash(), "root", recent.Root()) + if err := triedb.Commit(recent.Root(), true); err != nil { + log.Error("Failed to commit recent state trie", "err", err) + } } } for !bc.triegc.Empty() { diff --git a/core/blockchain_test.go b/core/blockchain_test.go index 635379161c62ee1eeccffc325ff4210013c2074b..748cdc5c71e5e02b685b1cb02d70aa54298313e6 100644 --- a/core/blockchain_test.go +++ b/core/blockchain_test.go @@ -34,26 +34,6 @@ import ( "github.com/ethereum/go-ethereum/params" ) -// newTestBlockChain creates a blockchain without validation. -func newTestBlockChain(fake bool) *BlockChain { - db, _ := ethdb.NewMemDatabase() - gspec := &Genesis{ - Config: params.TestChainConfig, - Difficulty: big.NewInt(1), - } - gspec.MustCommit(db) - engine := ethash.NewFullFaker() - if !fake { - engine = ethash.NewTester() - } - blockchain, err := NewBlockChain(db, nil, gspec.Config, engine, vm.Config{}) - if err != nil { - panic(err) - } - blockchain.SetValidator(bproc{}) - return blockchain -} - // Test fork of length N starting from block i func testFork(t *testing.T, blockchain *BlockChain, i, n int, full bool, comparator func(td1, td2 *big.Int)) { // Copy old chain up to #i into a new db @@ -183,13 +163,18 @@ func insertChain(done chan bool, blockchain *BlockChain, chain types.Blocks, t * } func TestLastBlock(t *testing.T) { - bchain := newTestBlockChain(false) - defer bchain.Stop() + _, blockchain, err := newCanonical(ethash.NewFaker(), 0, true) + if err != nil { + t.Fatalf("failed to create pristine chain: %v", err) + } + defer blockchain.Stop() - block := makeBlockChain(bchain.CurrentBlock(), 1, ethash.NewFaker(), bchain.db, 0)[0] - bchain.insert(block) - if block.Hash() != GetHeadBlockHash(bchain.db) { - t.Errorf("Write/Get HeadBlockHash failed") + blocks := makeBlockChain(blockchain.CurrentBlock(), 1, ethash.NewFullFaker(), blockchain.db, 0) + if _, err := blockchain.InsertChain(blocks); err != nil { + t.Fatalf("Failed to insert block: %v", err) + } + if blocks[len(blocks)-1].Hash() != GetHeadBlockHash(blockchain.db) { + t.Fatalf("Write/Get HeadBlockHash failed") } } @@ -337,55 +322,13 @@ func testBrokenChain(t *testing.T, full bool) { } } -type bproc struct{} - -func (bproc) ValidateBody(*types.Block) error { return nil } -func (bproc) ValidateState(block, parent *types.Block, state *state.StateDB, receipts types.Receipts, usedGas uint64) error { - return nil -} -func (bproc) Process(block *types.Block, statedb *state.StateDB, cfg vm.Config) (types.Receipts, []*types.Log, uint64, error) { - return nil, nil, 0, nil -} - -func makeHeaderChainWithDiff(genesis *types.Block, d []int, seed byte) []*types.Header { - blocks := makeBlockChainWithDiff(genesis, d, seed) - headers := make([]*types.Header, len(blocks)) - for i, block := range blocks { - headers[i] = block.Header() - } - return headers -} - -func makeBlockChainWithDiff(genesis *types.Block, d []int, seed byte) []*types.Block { - var chain []*types.Block - for i, difficulty := range d { - header := &types.Header{ - Coinbase: common.Address{seed}, - Number: big.NewInt(int64(i + 1)), - Difficulty: big.NewInt(int64(difficulty)), - UncleHash: types.EmptyUncleHash, - TxHash: types.EmptyRootHash, - ReceiptHash: types.EmptyRootHash, - Time: big.NewInt(int64(i) + 1), - } - if i == 0 { - header.ParentHash = genesis.Hash() - } else { - header.ParentHash = chain[i-1].Hash() - } - block := types.NewBlockWithHeader(header) - chain = append(chain, block) - } - return chain -} - // Tests that reorganising a long difficult chain after a short easy one // overwrites the canonical numbers and links in the database. func TestReorgLongHeaders(t *testing.T) { testReorgLong(t, false) } func TestReorgLongBlocks(t *testing.T) { testReorgLong(t, true) } func testReorgLong(t *testing.T, full bool) { - testReorg(t, []int{1, 2, 4}, []int{1, 2, 3, 4}, 10, full) + testReorg(t, []int64{0, 0, -9}, []int64{0, 0, 0, -9}, 393280, full) } // Tests that reorganising a short difficult chain after a long easy one @@ -394,45 +337,82 @@ func TestReorgShortHeaders(t *testing.T) { testReorgShort(t, false) } func TestReorgShortBlocks(t *testing.T) { testReorgShort(t, true) } func testReorgShort(t *testing.T, full bool) { - testReorg(t, []int{1, 2, 3, 4}, []int{1, 10}, 11, full) + // Create a long easy chain vs. a short heavy one. Due to difficulty adjustment + // we need a fairly long chain of blocks with different difficulties for a short + // one to become heavyer than a long one. The 96 is an empirical value. + easy := make([]int64, 96) + for i := 0; i < len(easy); i++ { + easy[i] = 60 + } + diff := make([]int64, len(easy)-1) + for i := 0; i < len(diff); i++ { + diff[i] = -9 + } + testReorg(t, easy, diff, 12615120, full) } -func testReorg(t *testing.T, first, second []int, td int64, full bool) { - bc := newTestBlockChain(true) - defer bc.Stop() +func testReorg(t *testing.T, first, second []int64, td int64, full bool) { + // Create a pristine chain and database + db, blockchain, err := newCanonical(ethash.NewFaker(), 0, full) + if err != nil { + t.Fatalf("failed to create pristine chain: %v", err) + } + defer blockchain.Stop() // Insert an easy and a difficult chain afterwards + easyBlocks, _ := GenerateChain(params.TestChainConfig, blockchain.CurrentBlock(), ethash.NewFaker(), db, len(first), func(i int, b *BlockGen) { + b.OffsetTime(first[i]) + }) + diffBlocks, _ := GenerateChain(params.TestChainConfig, blockchain.CurrentBlock(), ethash.NewFaker(), db, len(second), func(i int, b *BlockGen) { + b.OffsetTime(second[i]) + }) if full { - bc.InsertChain(makeBlockChainWithDiff(bc.genesisBlock, first, 11)) - bc.InsertChain(makeBlockChainWithDiff(bc.genesisBlock, second, 22)) + if _, err := blockchain.InsertChain(easyBlocks); err != nil { + t.Fatalf("failed to insert easy chain: %v", err) + } + if _, err := blockchain.InsertChain(diffBlocks); err != nil { + t.Fatalf("failed to insert difficult chain: %v", err) + } } else { - bc.InsertHeaderChain(makeHeaderChainWithDiff(bc.genesisBlock, first, 11), 1) - bc.InsertHeaderChain(makeHeaderChainWithDiff(bc.genesisBlock, second, 22), 1) + easyHeaders := make([]*types.Header, len(easyBlocks)) + for i, block := range easyBlocks { + easyHeaders[i] = block.Header() + } + diffHeaders := make([]*types.Header, len(diffBlocks)) + for i, block := range diffBlocks { + diffHeaders[i] = block.Header() + } + if _, err := blockchain.InsertHeaderChain(easyHeaders, 1); err != nil { + t.Fatalf("failed to insert easy chain: %v", err) + } + if _, err := blockchain.InsertHeaderChain(diffHeaders, 1); err != nil { + t.Fatalf("failed to insert difficult chain: %v", err) + } } // Check that the chain is valid number and link wise if full { - prev := bc.CurrentBlock() - for block := bc.GetBlockByNumber(bc.CurrentBlock().NumberU64() - 1); block.NumberU64() != 0; prev, block = block, bc.GetBlockByNumber(block.NumberU64()-1) { + prev := blockchain.CurrentBlock() + for block := blockchain.GetBlockByNumber(blockchain.CurrentBlock().NumberU64() - 1); block.NumberU64() != 0; prev, block = block, blockchain.GetBlockByNumber(block.NumberU64()-1) { if prev.ParentHash() != block.Hash() { t.Errorf("parent block hash mismatch: have %x, want %x", prev.ParentHash(), block.Hash()) } } } else { - prev := bc.CurrentHeader() - for header := bc.GetHeaderByNumber(bc.CurrentHeader().Number.Uint64() - 1); header.Number.Uint64() != 0; prev, header = header, bc.GetHeaderByNumber(header.Number.Uint64()-1) { + prev := blockchain.CurrentHeader() + for header := blockchain.GetHeaderByNumber(blockchain.CurrentHeader().Number.Uint64() - 1); header.Number.Uint64() != 0; prev, header = header, blockchain.GetHeaderByNumber(header.Number.Uint64()-1) { if prev.ParentHash != header.Hash() { t.Errorf("parent header hash mismatch: have %x, want %x", prev.ParentHash, header.Hash()) } } } // Make sure the chain total difficulty is the correct one - want := new(big.Int).Add(bc.genesisBlock.Difficulty(), big.NewInt(td)) + want := new(big.Int).Add(blockchain.genesisBlock.Difficulty(), big.NewInt(td)) if full { - if have := bc.GetTdByHash(bc.CurrentBlock().Hash()); have.Cmp(want) != 0 { + if have := blockchain.GetTdByHash(blockchain.CurrentBlock().Hash()); have.Cmp(want) != 0 { t.Errorf("total difficulty mismatch: have %v, want %v", have, want) } } else { - if have := bc.GetTdByHash(bc.CurrentHeader().Hash()); have.Cmp(want) != 0 { + if have := blockchain.GetTdByHash(blockchain.CurrentHeader().Hash()); have.Cmp(want) != 0 { t.Errorf("total difficulty mismatch: have %v, want %v", have, want) } } @@ -443,19 +423,28 @@ func TestBadHeaderHashes(t *testing.T) { testBadHashes(t, false) } func TestBadBlockHashes(t *testing.T) { testBadHashes(t, true) } func testBadHashes(t *testing.T, full bool) { - bc := newTestBlockChain(true) - defer bc.Stop() + // Create a pristine chain and database + db, blockchain, err := newCanonical(ethash.NewFaker(), 0, full) + if err != nil { + t.Fatalf("failed to create pristine chain: %v", err) + } + defer blockchain.Stop() // Create a chain, ban a hash and try to import - var err error if full { - blocks := makeBlockChainWithDiff(bc.genesisBlock, []int{1, 2, 4}, 10) + blocks := makeBlockChain(blockchain.CurrentBlock(), 3, ethash.NewFaker(), db, 10) + BadHashes[blocks[2].Header().Hash()] = true - _, err = bc.InsertChain(blocks) + defer func() { delete(BadHashes, blocks[2].Header().Hash()) }() + + _, err = blockchain.InsertChain(blocks) } else { - headers := makeHeaderChainWithDiff(bc.genesisBlock, []int{1, 2, 4}, 10) + headers := makeHeaderChain(blockchain.CurrentHeader(), 3, ethash.NewFaker(), db, 10) + BadHashes[headers[2].Hash()] = true - _, err = bc.InsertHeaderChain(headers, 1) + defer func() { delete(BadHashes, headers[2].Hash()) }() + + _, err = blockchain.InsertHeaderChain(headers, 1) } if err != ErrBlacklistedHash { t.Errorf("error mismatch: have: %v, want: %v", err, ErrBlacklistedHash) @@ -468,40 +457,41 @@ func TestReorgBadHeaderHashes(t *testing.T) { testReorgBadHashes(t, false) } func TestReorgBadBlockHashes(t *testing.T) { testReorgBadHashes(t, true) } func testReorgBadHashes(t *testing.T, full bool) { - bc := newTestBlockChain(true) - defer bc.Stop() - + // Create a pristine chain and database + db, blockchain, err := newCanonical(ethash.NewFaker(), 0, full) + if err != nil { + t.Fatalf("failed to create pristine chain: %v", err) + } // Create a chain, import and ban afterwards - headers := makeHeaderChainWithDiff(bc.genesisBlock, []int{1, 2, 3, 4}, 10) - blocks := makeBlockChainWithDiff(bc.genesisBlock, []int{1, 2, 3, 4}, 10) + headers := makeHeaderChain(blockchain.CurrentHeader(), 4, ethash.NewFaker(), db, 10) + blocks := makeBlockChain(blockchain.CurrentBlock(), 4, ethash.NewFaker(), db, 10) if full { - if _, err := bc.InsertChain(blocks); err != nil { - t.Fatalf("failed to import blocks: %v", err) + if _, err = blockchain.InsertChain(blocks); err != nil { + t.Errorf("failed to import blocks: %v", err) } - if bc.CurrentBlock().Hash() != blocks[3].Hash() { - t.Errorf("last block hash mismatch: have: %x, want %x", bc.CurrentBlock().Hash(), blocks[3].Header().Hash()) + if blockchain.CurrentBlock().Hash() != blocks[3].Hash() { + t.Errorf("last block hash mismatch: have: %x, want %x", blockchain.CurrentBlock().Hash(), blocks[3].Header().Hash()) } BadHashes[blocks[3].Header().Hash()] = true defer func() { delete(BadHashes, blocks[3].Header().Hash()) }() } else { - if _, err := bc.InsertHeaderChain(headers, 1); err != nil { - t.Fatalf("failed to import headers: %v", err) + if _, err = blockchain.InsertHeaderChain(headers, 1); err != nil { + t.Errorf("failed to import headers: %v", err) } - if bc.CurrentHeader().Hash() != headers[3].Hash() { - t.Errorf("last header hash mismatch: have: %x, want %x", bc.CurrentHeader().Hash(), headers[3].Hash()) + if blockchain.CurrentHeader().Hash() != headers[3].Hash() { + t.Errorf("last header hash mismatch: have: %x, want %x", blockchain.CurrentHeader().Hash(), headers[3].Hash()) } BadHashes[headers[3].Hash()] = true defer func() { delete(BadHashes, headers[3].Hash()) }() } + blockchain.Stop() // Create a new BlockChain and check that it rolled back the state. - ncm, err := NewBlockChain(bc.db, nil, bc.chainConfig, ethash.NewFaker(), vm.Config{}) + ncm, err := NewBlockChain(blockchain.db, nil, blockchain.chainConfig, ethash.NewFaker(), vm.Config{}) if err != nil { t.Fatalf("failed to create new chain manager: %v", err) } - defer ncm.Stop() - if full { if ncm.CurrentBlock().Hash() != blocks[2].Header().Hash() { t.Errorf("last block hash mismatch: have: %x, want %x", ncm.CurrentBlock().Hash(), blocks[2].Header().Hash()) @@ -514,6 +504,7 @@ func testReorgBadHashes(t *testing.T, full bool) { t.Errorf("last header hash mismatch: have: %x, want %x", ncm.CurrentHeader().Hash(), headers[2].Hash()) } } + ncm.Stop() } // Tests chain insertions in the face of one entity containing an invalid nonce. @@ -989,10 +980,13 @@ done: // Tests if the canonical block can be fetched from the database during chain insertion. func TestCanonicalBlockRetrieval(t *testing.T) { - bc := newTestBlockChain(true) - defer bc.Stop() + _, blockchain, err := newCanonical(ethash.NewFaker(), 0, true) + if err != nil { + t.Fatalf("failed to create pristine chain: %v", err) + } + defer blockchain.Stop() - chain, _ := GenerateChain(bc.chainConfig, bc.genesisBlock, ethash.NewFaker(), bc.db, 10, func(i int, gen *BlockGen) {}) + chain, _ := GenerateChain(blockchain.chainConfig, blockchain.genesisBlock, ethash.NewFaker(), blockchain.db, 10, func(i int, gen *BlockGen) {}) var pend sync.WaitGroup pend.Add(len(chain)) @@ -1003,14 +997,14 @@ func TestCanonicalBlockRetrieval(t *testing.T) { // try to retrieve a block by its canonical hash and see if the block data can be retrieved. for { - ch := GetCanonicalHash(bc.db, block.NumberU64()) + ch := GetCanonicalHash(blockchain.db, block.NumberU64()) if ch == (common.Hash{}) { continue // busy wait for canonical hash to be written } if ch != block.Hash() { t.Fatalf("unknown canonical hash, want %s, got %s", block.Hash().Hex(), ch.Hex()) } - fb := GetBlock(bc.db, ch, block.NumberU64()) + fb := GetBlock(blockchain.db, ch, block.NumberU64()) if fb == nil { t.Fatalf("unable to retrieve block %d for canonical hash: %s", block.NumberU64(), ch.Hex()) } @@ -1021,7 +1015,7 @@ func TestCanonicalBlockRetrieval(t *testing.T) { } }(chain[i]) - if _, err := bc.InsertChain(types.Blocks{chain[i]}); err != nil { + if _, err := blockchain.InsertChain(types.Blocks{chain[i]}); err != nil { t.Fatalf("failed to insert block %d: %v", i, err) } } diff --git a/core/genesis_test.go b/core/genesis_test.go index cd548d4b1dca38c9b38190e12e066b154b6544d1..052ded6991f973a581fa61bb22c1ee54c7f3101d 100644 --- a/core/genesis_test.go +++ b/core/genesis_test.go @@ -118,10 +118,12 @@ func TestSetupGenesis(t *testing.T) { // Commit the 'old' genesis block with Homestead transition at #2. // Advance to block #4, past the homestead transition block of customg. genesis := oldcustomg.MustCommit(db) + bc, _ := NewBlockChain(db, nil, oldcustomg.Config, ethash.NewFullFaker(), vm.Config{}) defer bc.Stop() - bc.SetValidator(bproc{}) - bc.InsertChain(makeBlockChainWithDiff(genesis, []int{2, 3, 4, 5}, 0)) + + blocks, _ := GenerateChain(oldcustomg.Config, genesis, ethash.NewFaker(), db, 4, nil) + bc.InsertChain(blocks) bc.CurrentBlock() // This should return a compatibility error. return SetupGenesisBlock(db, &customg)