File size: 1,836 Bytes
e36aeda | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | // Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package race_test
import (
"runtime"
"sync"
"testing"
"time"
"unsafe"
)
func TestNoRaceFin(t *testing.T) {
c := make(chan bool)
go func() {
x := new(string)
runtime.SetFinalizer(x, func(x *string) {
*x = "foo"
})
*x = "bar"
c <- true
}()
<-c
runtime.GC()
time.Sleep(100 * time.Millisecond)
}
var finVar struct {
sync.Mutex
cnt int
}
func TestNoRaceFinGlobal(t *testing.T) {
c := make(chan bool)
go func() {
x := new(string)
runtime.SetFinalizer(x, func(x *string) {
finVar.Lock()
finVar.cnt++
finVar.Unlock()
})
c <- true
}()
<-c
runtime.GC()
time.Sleep(100 * time.Millisecond)
finVar.Lock()
finVar.cnt++
finVar.Unlock()
}
func TestRaceFin(t *testing.T) {
c := make(chan bool)
y := 0
_ = y
go func() {
x := new(string)
runtime.SetFinalizer(x, func(x *string) {
y = 42
})
c <- true
}()
<-c
runtime.GC()
time.Sleep(100 * time.Millisecond)
y = 66
}
func TestNoRaceCleanup(t *testing.T) {
c := make(chan bool)
go func() {
x := new(string)
y := new(string)
runtime.AddCleanup(x, func(y *string) {
*y = "foo"
}, y)
*y = "bar"
runtime.KeepAlive(x)
c <- true
}()
<-c
runtime.GC()
time.Sleep(100 * time.Millisecond)
}
func TestRaceBetweenCleanups(t *testing.T) {
// Allocate struct with pointer to avoid hitting tinyalloc.
// Otherwise we can't be sure when the allocation will
// be freed.
type T struct {
v int
p unsafe.Pointer
}
sharedVar := new(int)
v0 := new(T)
v1 := new(T)
cleanup := func(x int) {
*sharedVar = x
}
runtime.AddCleanup(v0, cleanup, 0)
runtime.AddCleanup(v1, cleanup, 0)
v0 = nil
v1 = nil
runtime.GC()
time.Sleep(100 * time.Millisecond)
}
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