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22919cec1b
Every tracer that implements Stop/GetResult held a `reason error` field that is written by Stop (called from the trace-timeout watchdog goroutine in api.go) and read by GetResult (called by the RPC handler main goroutine). These accesses were unsynchronized.
80 lines
2.7 KiB
Go
80 lines
2.7 KiB
Go
// Copyright 2026 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 native_test
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import (
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"errors"
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"math/big"
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"sync"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/eth/tracers"
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"github.com/ethereum/go-ethereum/params"
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"github.com/stretchr/testify/require"
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)
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// TestTracerStopRace exercises the concurrent Stop / GetResult path that the
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// trace RPC handler uses: a timeout watchdog goroutine calls Stop while the
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// main goroutine is still running the trace and will eventually call
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// GetResult. Under -race, writes to the interruption reason field must not
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// race with reads, for every tracer that implements it.
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//
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// callTracer, flatCallTracer and erc7562Tracer's GetResult short-circuits on
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// an empty callstack ("incorrect number of top-level calls") before loading
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// the reason. For those tracers the test pushes a single top-level call frame
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// via OnEnter so GetResult reaches the reason.Load() path where the race can
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// be observed under -race.
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func TestTracerStopRace(t *testing.T) {
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type setup struct {
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name string
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needsFrame bool // whether GetResult requires a top-level call frame
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}
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cases := []setup{
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{"callTracer", true},
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{"flatCallTracer", true},
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{"4byteTracer", false},
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{"prestateTracer", false},
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{"erc7562Tracer", true},
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}
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for _, s := range cases {
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t.Run(s.name, func(t *testing.T) {
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tr, err := tracers.DefaultDirectory.New(s.name, &tracers.Context{}, nil, params.MainnetChainConfig)
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require.NoError(t, err)
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if s.needsFrame && tr.OnEnter != nil {
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// Push a single top-level call frame so GetResult doesn't
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// short-circuit before reading the interruption reason.
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tr.OnEnter(0, byte(vm.CALL), common.Address{}, common.Address{}, nil, 0, big.NewInt(0))
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}
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stopErr := errors.New("execution timeout")
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var wg sync.WaitGroup
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wg.Add(2)
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go func() {
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defer wg.Done()
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tr.Stop(stopErr)
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}()
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go func() {
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defer wg.Done()
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_, _ = tr.GetResult()
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}()
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wg.Wait()
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})
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}
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}
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