200 lines
7.0 KiB
Go
200 lines
7.0 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package core
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import (
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"runtime"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/params"
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)
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// Tests that simple header verification works, for both good and bad blocks.
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func TestHeaderVerification(t *testing.T) {
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// Create a simple chain to verify
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var (
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testdb = rawdb.NewMemoryDatabase()
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gspec = &Genesis{Config: params.TestChainConfig}
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genesis = gspec.MustCommit(testdb)
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blocks, _ = GenerateChain(params.TestChainConfig, genesis, ethash.NewFaker(), testdb, 8, nil)
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)
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headers := make([]*types.Header, len(blocks))
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for i, block := range blocks {
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headers[i] = block.Header()
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}
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// Run the header checker for blocks one-by-one, checking for both valid and invalid nonces
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chain, _ := NewBlockChain(testdb, nil, params.TestChainConfig, ethash.NewFaker(), vm.Config{}, nil)
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defer chain.Stop()
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for i := 0; i < len(blocks); i++ {
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for j, valid := range []bool{true, false} {
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var results <-chan error
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if valid {
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engine := ethash.NewFaker()
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_, results = engine.VerifyHeaders(chain, []*types.Header{headers[i]}, []bool{true})
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} else {
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engine := ethash.NewFakeFailer(headers[i].Number.Uint64())
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_, results = engine.VerifyHeaders(chain, []*types.Header{headers[i]}, []bool{true})
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}
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// Wait for the verification result
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select {
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case result := <-results:
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if (result == nil) != valid {
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t.Errorf("test %d.%d: validity mismatch: have %v, want %v", i, j, result, valid)
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}
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case <-time.After(time.Second):
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t.Fatalf("test %d.%d: verification timeout", i, j)
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}
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// Make sure no more data is returned
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select {
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case result := <-results:
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t.Fatalf("test %d.%d: unexpected result returned: %v", i, j, result)
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case <-time.After(25 * time.Millisecond):
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}
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}
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chain.InsertChain(blocks[i : i+1])
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}
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}
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// Tests that concurrent header verification works, for both good and bad blocks.
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func TestHeaderConcurrentVerification2(t *testing.T) { testHeaderConcurrentVerification(t, 2) }
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func TestHeaderConcurrentVerification8(t *testing.T) { testHeaderConcurrentVerification(t, 8) }
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func TestHeaderConcurrentVerification32(t *testing.T) { testHeaderConcurrentVerification(t, 32) }
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func testHeaderConcurrentVerification(t *testing.T, threads int) {
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// Create a simple chain to verify
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var (
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testdb = rawdb.NewMemoryDatabase()
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gspec = &Genesis{Config: params.TestChainConfig}
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genesis = gspec.MustCommit(testdb)
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blocks, _ = GenerateChain(params.TestChainConfig, genesis, ethash.NewFaker(), testdb, 8, nil)
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)
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headers := make([]*types.Header, len(blocks))
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seals := make([]bool, len(blocks))
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for i, block := range blocks {
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headers[i] = block.Header()
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seals[i] = true
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}
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// Set the number of threads to verify on
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old := runtime.GOMAXPROCS(threads)
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defer runtime.GOMAXPROCS(old)
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// Run the header checker for the entire block chain at once both for a valid and
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// also an invalid chain (enough if one arbitrary block is invalid).
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for i, valid := range []bool{true, false} {
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var results <-chan error
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if valid {
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chain, _ := NewBlockChain(testdb, nil, params.TestChainConfig, ethash.NewFaker(), vm.Config{}, nil)
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_, results = chain.engine.VerifyHeaders(chain, headers, seals)
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chain.Stop()
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} else {
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chain, _ := NewBlockChain(testdb, nil, params.TestChainConfig, ethash.NewFakeFailer(uint64(len(headers)-1)), vm.Config{}, nil)
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_, results = chain.engine.VerifyHeaders(chain, headers, seals)
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chain.Stop()
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}
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// Wait for all the verification results
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checks := make(map[int]error)
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for j := 0; j < len(blocks); j++ {
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select {
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case result := <-results:
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checks[j] = result
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case <-time.After(time.Second):
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t.Fatalf("test %d.%d: verification timeout", i, j)
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}
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}
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// Check nonce check validity
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for j := 0; j < len(blocks); j++ {
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want := valid || (j < len(blocks)-2) // We chose the last-but-one nonce in the chain to fail
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if (checks[j] == nil) != want {
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t.Errorf("test %d.%d: validity mismatch: have %v, want %v", i, j, checks[j], want)
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}
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if !want {
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// A few blocks after the first error may pass verification due to concurrent
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// workers. We don't care about those in this test, just that the correct block
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// errors out.
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break
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}
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}
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// Make sure no more data is returned
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select {
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case result := <-results:
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t.Fatalf("test %d: unexpected result returned: %v", i, result)
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case <-time.After(25 * time.Millisecond):
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}
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}
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}
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// Tests that aborting a header validation indeed prevents further checks from being
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// run, as well as checks that no left-over goroutines are leaked.
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func TestHeaderConcurrentAbortion2(t *testing.T) { testHeaderConcurrentAbortion(t, 2) }
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func TestHeaderConcurrentAbortion8(t *testing.T) { testHeaderConcurrentAbortion(t, 8) }
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func TestHeaderConcurrentAbortion32(t *testing.T) { testHeaderConcurrentAbortion(t, 32) }
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func testHeaderConcurrentAbortion(t *testing.T, threads int) {
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// Create a simple chain to verify
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var (
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testdb = rawdb.NewMemoryDatabase()
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gspec = &Genesis{Config: params.TestChainConfig}
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genesis = gspec.MustCommit(testdb)
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blocks, _ = GenerateChain(params.TestChainConfig, genesis, ethash.NewFaker(), testdb, 1024, nil)
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)
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headers := make([]*types.Header, len(blocks))
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seals := make([]bool, len(blocks))
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for i, block := range blocks {
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headers[i] = block.Header()
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seals[i] = true
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}
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// Set the number of threads to verify on
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old := runtime.GOMAXPROCS(threads)
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defer runtime.GOMAXPROCS(old)
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// Start the verifications and immediately abort
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chain, _ := NewBlockChain(testdb, nil, params.TestChainConfig, ethash.NewFakeDelayer(time.Millisecond), vm.Config{}, nil)
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defer chain.Stop()
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abort, results := chain.engine.VerifyHeaders(chain, headers, seals)
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close(abort)
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// Deplete the results channel
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verified := 0
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for depleted := false; !depleted; {
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select {
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case result := <-results:
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if result != nil {
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t.Errorf("header %d: validation failed: %v", verified, result)
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}
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verified++
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case <-time.After(50 * time.Millisecond):
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depleted = true
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}
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}
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// Check that abortion was honored by not processing too many POWs
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if verified > 2*threads {
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t.Errorf("verification count too large: have %d, want below %d", verified, 2*threads)
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}
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}
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