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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
// Copyright 2017 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 runtime_test
import (
"reflect"
. "runtime"
"testing"
"time"
"unsafe"
)
func TestProfBuf(t *testing.T) {
const hdrSize = 2
write := func(t *testing.T, b *ProfBuf, tag unsafe.Pointer, now int64, hdr []uint64, stk []uintptr) {
b.Write(&tag, now, hdr, stk)
}
read := func(t *testing.T, b *ProfBuf, data []uint64, tags []unsafe.Pointer) {
rdata, rtags, eof := b.Read(ProfBufNonBlocking)
if !reflect.DeepEqual(rdata, data) || !reflect.DeepEqual(rtags, tags) {
t.Fatalf("unexpected profile read:\nhave data %#x\nwant data %#x\nhave tags %#x\nwant tags %#x", rdata, data, rtags, tags)
}
if eof {
t.Fatalf("unexpected eof")
}
}
readBlock := func(t *testing.T, b *ProfBuf, data []uint64, tags []unsafe.Pointer) func() {
c := make(chan int)
go func() {
eof := data == nil
rdata, rtags, reof := b.Read(ProfBufBlocking)
if !reflect.DeepEqual(rdata, data) || !reflect.DeepEqual(rtags, tags) || reof != eof {
// Errorf, not Fatalf, because called in goroutine.
t.Errorf("unexpected profile read:\nhave data %#x\nwant data %#x\nhave tags %#x\nwant tags %#x\nhave eof=%v, want %v", rdata, data, rtags, tags, reof, eof)
}
c <- 1
}()
time.Sleep(10 * time.Millisecond) // let goroutine run and block
return func() {
select {
case <-c:
case <-time.After(1 * time.Second):
t.Fatalf("timeout waiting for blocked read")
}
}
}
readEOF := func(t *testing.T, b *ProfBuf) {
rdata, rtags, eof := b.Read(ProfBufBlocking)
if rdata != nil || rtags != nil || !eof {
t.Errorf("unexpected profile read: %#x, %#x, eof=%v; want nil, nil, eof=true", rdata, rtags, eof)
}
rdata, rtags, eof = b.Read(ProfBufNonBlocking)
if rdata != nil || rtags != nil || !eof {
t.Errorf("unexpected profile read (non-blocking): %#x, %#x, eof=%v; want nil, nil, eof=true", rdata, rtags, eof)
}
}
myTags := make([]byte, 100)
t.Logf("myTags is %p", &myTags[0])
t.Run("BasicWriteRead", func(t *testing.T) {
b := NewProfBuf(2, 11, 1)
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
read(t, b, nil, nil) // release data returned by previous read
write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
read(t, b, []uint64{8, 99, 101, 102, 201, 202, 203, 204}, []unsafe.Pointer{unsafe.Pointer(&myTags[2])})
})
t.Run("ReadMany", func(t *testing.T) {
b := NewProfBuf(2, 50, 50)
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
write(t, b, unsafe.Pointer(&myTags[1]), 500, []uint64{502, 504}, []uintptr{506})
read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 99, 101, 102, 201, 202, 203, 204, 5, 500, 502, 504, 506}, []unsafe.Pointer{unsafe.Pointer(&myTags[0]), unsafe.Pointer(&myTags[2]), unsafe.Pointer(&myTags[1])})
})
t.Run("ReadManyShortData", func(t *testing.T) {
b := NewProfBuf(2, 50, 50)
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 99, 101, 102, 201, 202, 203, 204}, []unsafe.Pointer{unsafe.Pointer(&myTags[0]), unsafe.Pointer(&myTags[2])})
})
t.Run("ReadManyShortTags", func(t *testing.T) {
b := NewProfBuf(2, 50, 50)
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 99, 101, 102, 201, 202, 203, 204}, []unsafe.Pointer{unsafe.Pointer(&myTags[0]), unsafe.Pointer(&myTags[2])})
})
t.Run("ReadAfterOverflow1", func(t *testing.T) {
// overflow record synthesized by write
b := NewProfBuf(2, 16, 5)
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9}) // uses 10
read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])}) // reads 10 but still in use until next read
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5}) // uses 6
read(t, b, []uint64{6, 1, 2, 3, 4, 5}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])}) // reads 6 but still in use until next read
// now 10 available
write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204, 205, 206, 207, 208, 209}) // no room
for i := 0; i < 299; i++ {
write(t, b, unsafe.Pointer(&myTags[3]), int64(100+i), []uint64{101, 102}, []uintptr{201, 202, 203, 204}) // no room for overflow+this record
}
write(t, b, unsafe.Pointer(&myTags[1]), 500, []uint64{502, 504}, []uintptr{506}) // room for overflow+this record
read(t, b, []uint64{5, 99, 0, 0, 300, 5, 500, 502, 504, 506}, []unsafe.Pointer{nil, unsafe.Pointer(&myTags[1])})
})
t.Run("ReadAfterOverflow2", func(t *testing.T) {
// overflow record synthesized by read
b := NewProfBuf(2, 16, 5)
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213})
for i := 0; i < 299; i++ {
write(t, b, unsafe.Pointer(&myTags[3]), 100, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
}
read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])}) // reads 10 but still in use until next read
write(t, b, unsafe.Pointer(&myTags[1]), 500, []uint64{502, 504}, []uintptr{}) // still overflow
read(t, b, []uint64{5, 99, 0, 0, 301}, []unsafe.Pointer{nil}) // overflow synthesized by read
write(t, b, unsafe.Pointer(&myTags[1]), 500, []uint64{502, 505}, []uintptr{506}) // written
read(t, b, []uint64{5, 500, 502, 505, 506}, []unsafe.Pointer{unsafe.Pointer(&myTags[1])})
})
t.Run("ReadAtEndAfterOverflow", func(t *testing.T) {
b := NewProfBuf(2, 12, 5)
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
for i := 0; i < 299; i++ {
write(t, b, unsafe.Pointer(&myTags[3]), 100, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
}
read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
read(t, b, []uint64{5, 99, 0, 0, 300}, []unsafe.Pointer{nil})
write(t, b, unsafe.Pointer(&myTags[1]), 500, []uint64{502, 504}, []uintptr{506})
read(t, b, []uint64{5, 500, 502, 504, 506}, []unsafe.Pointer{unsafe.Pointer(&myTags[1])})
})
t.Run("BlockingWriteRead", func(t *testing.T) {
b := NewProfBuf(2, 11, 1)
wait := readBlock(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
wait()
wait = readBlock(t, b, []uint64{8, 99, 101, 102, 201, 202, 203, 204}, []unsafe.Pointer{unsafe.Pointer(&myTags[2])})
time.Sleep(10 * time.Millisecond)
write(t, b, unsafe.Pointer(&myTags[2]), 99, []uint64{101, 102}, []uintptr{201, 202, 203, 204})
wait()
wait = readBlock(t, b, nil, nil)
b.Close()
wait()
wait = readBlock(t, b, nil, nil)
wait()
readEOF(t, b)
})
t.Run("DataWraparound", func(t *testing.T) {
b := NewProfBuf(2, 16, 1024)
for i := 0; i < 10; i++ {
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
read(t, b, nil, nil) // release data returned by previous read
}
})
t.Run("TagWraparound", func(t *testing.T) {
b := NewProfBuf(2, 1024, 2)
for i := 0; i < 10; i++ {
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
read(t, b, nil, nil) // release data returned by previous read
}
})
t.Run("BothWraparound", func(t *testing.T) {
b := NewProfBuf(2, 16, 2)
for i := 0; i < 10; i++ {
write(t, b, unsafe.Pointer(&myTags[0]), 1, []uint64{2, 3}, []uintptr{4, 5, 6, 7, 8, 9})
read(t, b, []uint64{10, 1, 2, 3, 4, 5, 6, 7, 8, 9}, []unsafe.Pointer{unsafe.Pointer(&myTags[0])})
read(t, b, nil, nil) // release data returned by previous read
}
})
}
|
