remove deadlock checker

go.mod

@@ -33,7 +33,6 @@ require (
 	github.com/frankban/quicktest v1.14.6
 	github.com/fsnotify/fsnotify v1.5.4
 	github.com/go-llsqlite/adapter v0.0.0-20230927005056-7f5ce7f0c916
-	github.com/go-stack/stack v1.8.0
 	github.com/google/btree v1.1.2
 	github.com/google/go-cmp v0.5.9
 	github.com/gorilla/websocket v1.5.0
@@ -43,7 +42,6 @@ require (
 	github.com/pion/webrtc/v3 v3.1.42
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.12.2
-	github.com/sasha-s/go-deadlock v0.3.1
 	github.com/stretchr/testify v1.8.4
 	github.com/tidwall/btree v1.6.0
 	go.etcd.io/bbolt v1.3.6
@@ -79,7 +77,6 @@ require (
 	github.com/mattn/go-isatty v0.0.19 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
 	github.com/mschoch/smat v0.2.0 // indirect
-	github.com/petermattis/goid v0.0.0-20180202154549-b0b1615b78e5 // indirect
 	github.com/pion/dtls/v2 v2.2.4 // indirect
 	github.com/pion/ice/v2 v2.2.6 // indirect
 	github.com/pion/interceptor v0.1.11 // indirect

go.sum

@@ -218,7 +218,6 @@ github.com/go-logr/logr v1.2.3 h1:2DntVwHkVopvECVRSlL5PSo9eG+cAkDCuckLubN+rq0=
 github.com/go-logr/logr v1.2.3/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
-github.com/go-stack/stack v1.8.0 h1:5SgMzNM5HxrEjV0ww2lTmX6E2Izsfxas4+YHWRs3Lsk=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0/go.mod h1:fyg7847qk6SyHyPtNmDHnmrv/HOrqktSC+C9fM+CJOE=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
@@ -365,8 +364,6 @@ github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7J
 github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
 github.com/onsi/gomega v1.17.0/go.mod h1:HnhC7FXeEQY45zxNK3PPoIUhzk/80Xly9PcubAlGdZY=
 github.com/openzipkin/zipkin-go v0.1.6/go.mod h1:QgAqvLzwWbR/WpD4A3cGpPtJrZXNIiJc5AZX7/PBEpw=
-github.com/petermattis/goid v0.0.0-20180202154549-b0b1615b78e5 h1:q2e307iGHPdTGp0hoxKjt1H5pDo6utceo3dQVK3I5XQ=
-github.com/petermattis/goid v0.0.0-20180202154549-b0b1615b78e5/go.mod h1:jvVRKCrJTQWu0XVbaOlby/2lO20uSCHEMzzplHXte1o=
 github.com/philhofer/fwd v1.0.0/go.mod h1:gk3iGcWd9+svBvR0sR+KPcfE+RNWozjowpeBVG3ZVNU=
 github.com/pierrec/lz4 v2.0.5+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
 github.com/pion/datachannel v1.5.2 h1:piB93s8LGmbECrpO84DnkIVWasRMk3IimbcXkTQLE6E=
@@ -466,8 +463,6 @@ github.com/rs/dnscache v0.0.0-20211102005908-e0241e321417 h1:Lt9DzQALzHoDwMBGJ6v
 github.com/rs/dnscache v0.0.0-20211102005908-e0241e321417/go.mod h1:qe5TWALJ8/a1Lqznoc5BDHpYX/8HU60Hm2AwRmqzxqA=
 github.com/ryszard/goskiplist v0.0.0-20150312221310-2dfbae5fcf46 h1:GHRpF1pTW19a8tTFrMLUcfWwyC0pnifVo2ClaLq+hP8=
 github.com/ryszard/goskiplist v0.0.0-20150312221310-2dfbae5fcf46/go.mod h1:uAQ5PCi+MFsC7HjREoAz1BU+Mq60+05gifQSsHSDG/8=
-github.com/sasha-s/go-deadlock v0.3.1 h1:sqv7fDNShgjcaxkO0JNcOAlr8B9+cV5Ey/OB71efZx0=
-github.com/sasha-s/go-deadlock v0.3.1/go.mod h1:F73l+cr82YSh10GxyRI6qZiCgK64VaZjwesgfQ1/iLM=
 github.com/sclevine/agouti v3.0.0+incompatible/go.mod h1:b4WX9W9L1sfQKXeJf1mUTLZKJ48R1S7H23Ji7oFO5Bw=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=

torrent.go

@@ -32,7 +32,6 @@ import (
 	"github.com/anacrolix/multiless"
 	"github.com/anacrolix/sync"
 	"github.com/pion/datachannel"
-	"github.com/sasha-s/go-deadlock"
 	"golang.org/x/sync/errgroup"
 	"golang.org/x/time/rate"
 
@@ -50,91 +49,10 @@ import (
 	typedRoaring "github.com/anacrolix/torrent/typed-roaring"
 	"github.com/anacrolix/torrent/webseed"
 	"github.com/anacrolix/torrent/webtorrent"
-	stack2 "github.com/go-stack/stack"
 )
 
 var bufPool = storage.NewBufferPool()
 
-func stack(skip int) string {
-	return stack2.Trace().TrimBelow(stack2.Caller(skip)).String()
-}
-
-func init() {
-	deadlock.Opts.DeadlockTimeout = 3 * time.Minute
-}
-
-type mu struct {
-	deadlock.RWMutex
-	rlc        atomic.Int32
-	lc         atomic.Int32
-	rlmu       sync.Mutex
-	rlocker    [20]string
-	rlocktime  time.Time
-	locker     string
-	nextlocker string
-	locktime   time.Time
-}
-
-func (m *mu) RLock() {
-	m.RWMutex.RLock()
-	m.rlmu.Lock()
-	rlc := m.rlc.Load()
-	if int(rlc) < len(m.rlocker) {
-		m.rlocker[rlc] = string(stack(2))
-	}
-	if rlc == 0 {
-		m.rlocktime = time.Now()
-	}
-	m.rlc.Add(1)
-	m.rlmu.Unlock()
-	//fmt.Println("R", m.rlc, string(dbg.Stack())[:40])
-
-}
-
-func (m *mu) RUnlock() {
-	m.rlmu.Lock()
-	m.rlc.Add(-1)
-	rlc := m.rlc.Load()
-	if rlc < 0 {
-		panic("lock underflow")
-	}
-	if rlc == 0 {
-		m.rlocktime = time.Time{}
-	}
-	if int(rlc) < len(m.rlocker) {
-		m.rlocker[m.rlc.Load()] = ""
-	}
-	m.rlmu.Unlock()
-	m.RWMutex.RUnlock()
-	//fmt.Println("RUN", m.rlc) //, string(dbg.Stack()))
-}
-
-func (m *mu) Lock() {
-	m.rlmu.Lock()
-	if m.nextlocker == "" {
-		m.nextlocker = string(stack(2))
-	}
-	m.rlmu.Unlock()
-	m.RWMutex.Lock()
-	m.lc.Add(1)
-	m.rlmu.Lock()
-	m.locker = m.nextlocker
-	m.locktime = time.Now()
-	m.nextlocker = ""
-	m.rlmu.Unlock()
-}
-
-func (m *mu) Unlock() {
-	m.lc.Add(-1)
-	if m.lc.Load() < 0 {
-		panic("lock underflow")
-	}
-	m.locker = ""
-	m.locktime = time.Time{}
-	m.RWMutex.Unlock()
-	//fmt.Println("LUN", m.lc) //, string(dbg.Stack()))
-}
-
 // Maintains state of torrent within a Client. Many methods should not be called before the info is
 // available, see .Info and .GotInfo.
 type Torrent struct {