eth/tracers: use atomic type (#27031)

Use the new atomic types in package eth/tracers

---------
Co-authored-by: Martin Holst Swende <martin@swende.se>
Co-authored-by: Sina Mahmoodi <itz.s1na@gmail.com>

eth/tracers/api_test.go

@@ -835,8 +835,8 @@ func TestTraceChain(t *testing.T) {
 	signer := types.HomesteadSigner{}
 
 	var (
-		ref   uint32 // total refs has made
-		rel   uint32 // total rels has made
+		ref   atomic.Uint32 // total refs has made
+		rel   atomic.Uint32 // total rels has made
 		nonce uint64
 	)
 	backend := newTestBackend(t, genBlocks, genesis, func(i int, b *core.BlockGen) {
@@ -849,8 +849,8 @@ func TestTraceChain(t *testing.T) {
 			nonce += 1
 		}
 	})
-	backend.refHook = func() { atomic.AddUint32(&ref, 1) }
-	backend.relHook = func() { atomic.AddUint32(&rel, 1) }
+	backend.refHook = func() { ref.Add(1) }
+	backend.relHook = func() { rel.Add(1) }
 	api := NewAPI(backend)
 
 	single := `{"result":{"gas":21000,"failed":false,"returnValue":"","structLogs":[]}}`
@@ -863,7 +863,8 @@ func TestTraceChain(t *testing.T) {
 		{10, 20, nil}, // the middle chain range, blocks [11, 20]
 	}
 	for _, c := range cases {
-		ref, rel = 0, 0 // clean up the counters
+		ref.Store(0)
+		rel.Store(0)
 
 		from, _ := api.blockByNumber(context.Background(), rpc.BlockNumber(c.start))
 		to, _ := api.blockByNumber(context.Background(), rpc.BlockNumber(c.end))
@@ -888,8 +889,9 @@ func TestTraceChain(t *testing.T) {
 		if next != c.end+1 {
 			t.Error("Missing tracing block")
 		}
-		if ref != rel {
-			t.Errorf("Ref and deref actions are not equal, ref %d rel %d", ref, rel)
+
+		if nref, nrel := ref.Load(), rel.Load(); nref != nrel {
+			t.Errorf("Ref and deref actions are not equal, ref %d rel %d", nref, nrel)
 		}
 	}
 }

eth/tracers/logger/logger.go

@@ -116,8 +116,8 @@ type StructLogger struct {
 	gasLimit uint64
 	usedGas  uint64
 
-	interrupt uint32 // Atomic flag to signal execution interruption
-	reason    error  // Textual reason for the interruption
+	interrupt atomic.Bool // Atomic flag to signal execution interruption
+	reason    error       // Textual reason for the interruption
 }
 
 // NewStructLogger returns a new logger
@@ -149,7 +149,7 @@ func (l *StructLogger) CaptureStart(env *vm.EVM, from common.Address, to common.
 // CaptureState also tracks SLOAD/SSTORE ops to track storage change.
 func (l *StructLogger) CaptureState(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
 	// If tracing was interrupted, set the error and stop
-	if atomic.LoadUint32(&l.interrupt) > 0 {
+	if l.interrupt.Load() {
 		return
 	}
 	// check if already accumulated the specified number of logs
@@ -258,7 +258,7 @@ func (l *StructLogger) GetResult() (json.RawMessage, error) {
 // Stop terminates execution of the tracer at the first opportune moment.
 func (l *StructLogger) Stop(err error) {
 	l.reason = err
-	atomic.StoreUint32(&l.interrupt, 1)
+	l.interrupt.Store(true)
 }
 
 func (l *StructLogger) CaptureTxStart(gasLimit uint64) {

eth/tracers/native/4byte.go

@@ -48,7 +48,7 @@ func init() {
 type fourByteTracer struct {
 	noopTracer
 	ids               map[string]int   // ids aggregates the 4byte ids found
-	interrupt         uint32           // Atomic flag to signal execution interruption
+	interrupt         atomic.Bool      // Atomic flag to signal execution interruption
 	reason            error            // Textual reason for the interruption
 	activePrecompiles []common.Address // Updated on CaptureStart based on given rules
 }
@@ -93,7 +93,7 @@ func (t *fourByteTracer) CaptureStart(env *vm.EVM, from common.Address, to commo
 // CaptureEnter is called when EVM enters a new scope (via call, create or selfdestruct).
 func (t *fourByteTracer) CaptureEnter(op vm.OpCode, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) {
 	// Skip if tracing was interrupted
-	if atomic.LoadUint32(&t.interrupt) > 0 {
+	if t.interrupt.Load() {
 		return
 	}
 	if len(input) < 4 {
@@ -124,7 +124,7 @@ func (t *fourByteTracer) GetResult() (json.RawMessage, error) {
 // Stop terminates execution of the tracer at the first opportune moment.
 func (t *fourByteTracer) Stop(err error) {
 	t.reason = err
-	atomic.StoreUint32(&t.interrupt, 1)
+	t.interrupt.Store(true)
 }
 
 func bytesToHex(s []byte) string {

eth/tracers/native/call.go

@@ -102,8 +102,8 @@ type callTracer struct {
 	callstack []callFrame
 	config    callTracerConfig
 	gasLimit  uint64
-	interrupt uint32 // Atomic flag to signal execution interruption
-	reason    error  // Textual reason for the interruption
+	interrupt atomic.Bool // Atomic flag to signal execution interruption
+	reason    error       // Textual reason for the interruption
 }
 
 type callTracerConfig struct {
@@ -161,7 +161,7 @@ func (t *callTracer) CaptureState(pc uint64, op vm.OpCode, gas, cost uint64, sco
 		return
 	}
 	// Skip if tracing was interrupted
-	if atomic.LoadUint32(&t.interrupt) > 0 {
+	if t.interrupt.Load() {
 		return
 	}
 	switch op {
@@ -197,7 +197,7 @@ func (t *callTracer) CaptureEnter(typ vm.OpCode, from common.Address, to common.
 		return
 	}
 	// Skip if tracing was interrupted
-	if atomic.LoadUint32(&t.interrupt) > 0 {
+	if t.interrupt.Load() {
 		return
 	}
 
@@ -262,7 +262,7 @@ func (t *callTracer) GetResult() (json.RawMessage, error) {
 // Stop terminates execution of the tracer at the first opportune moment.
 func (t *callTracer) Stop(err error) {
 	t.reason = err
-	atomic.StoreUint32(&t.interrupt, 1)
+	t.interrupt.Store(true)
 }
 
 // clearFailedLogs clears the logs of a callframe and all its children

eth/tracers/native/prestate.go

@@ -62,8 +62,8 @@ type prestateTracer struct {
 	to        common.Address
 	gasLimit  uint64 // Amount of gas bought for the whole tx
 	config    prestateTracerConfig
-	interrupt uint32 // Atomic flag to signal execution interruption
-	reason    error  // Textual reason for the interruption
+	interrupt atomic.Bool // Atomic flag to signal execution interruption
+	reason    error       // Textual reason for the interruption
 	created   map[common.Address]bool
 	deleted   map[common.Address]bool
 }
@@ -136,6 +136,10 @@ func (t *prestateTracer) CaptureState(pc uint64, op vm.OpCode, gas, cost uint64,
 	if err != nil {
 		return
 	}
+	// Skip if tracing was interrupted
+	if t.interrupt.Load() {
+		return
+	}
 	stack := scope.Stack
 	stackData := stack.Data()
 	stackLen := len(stackData)
@@ -259,7 +263,7 @@ func (t *prestateTracer) GetResult() (json.RawMessage, error) {
 // Stop terminates execution of the tracer at the first opportune moment.
 func (t *prestateTracer) Stop(err error) {
 	t.reason = err
-	atomic.StoreUint32(&t.interrupt, 1)
+	t.interrupt.Store(true)
 }
 
 // lookupAccount fetches details of an account and adds it to the prestate