目录
运行编译程序,并且指定参数
- 使用
--用于指定命令行参数 - 等同于指定命令
bin/go_build_main_go ckfpp -c 10240000
[going@dev cuckoohui]$ dlv exec bin/go_build_main_go -- ckfpp -c 10240000
Type 'help' for list of commands.
在开始的main函数添加断点
(dlv) b main.main
Breakpoint 1 (enabled) set at 0x605813 for main.main() ./main.go:12
查询函数,并且添加断点
(dlv) funcs cuckoo
cuckoohui/commands.(*CuckooCommand).Main
cuckoohui/commands.(*CuckooFppCommand).Main
cuckoohui/commands.(*HelloCommand).Main
cuckoohui/commands.(*HuiHelloCommand).Main
cuckoohui/configor.init.0
cuckoohui/di.init.0
cuckoohui/di.init.0.func1
cuckoohui/di.init.0.func1.1
cuckoohui/dotenv.init.0
github.com/seiflotfy/cuckoofilter.(*Filter).Count
github.com/seiflotfy/cuckoofilter.(*Filter).Delete
github.com/seiflotfy/cuckoofilter.(*Filter).Insert
github.com/seiflotfy/cuckoofilter.(*Filter).InsertUnique
github.com/seiflotfy/cuckoofilter.(*Filter).Lookup
github.com/seiflotfy/cuckoofilter.(*Filter).Reset
github.com/seiflotfy/cuckoofilter.(*Filter).delete
github.com/seiflotfy/cuckoofilter.(*Filter).insert
github.com/seiflotfy/cuckoofilter.(*Filter).reinsert
github.com/seiflotfy/cuckoofilter.(*bucket).delete
github.com/seiflotfy/cuckoofilter.(*bucket).getFingerprintIndex
github.com/seiflotfy/cuckoofilter.(*bucket).insert
github.com/seiflotfy/cuckoofilter.(*bucket).reset
github.com/seiflotfy/cuckoofilter.NewFilter
github.com/seiflotfy/cuckoofilter.getAltIndex
github.com/seiflotfy/cuckoofilter.getFingerprint
github.com/seiflotfy/cuckoofilter.getIndexAndFingerprint
github.com/seiflotfy/cuckoofilter.getNextPow2
github.com/seiflotfy/cuckoofilter.init.0
github.com/seiflotfy/cuckoofilter.randi
(dlv) b cuckoohui/commands.(*CuckooFppCommand).Main
Breakpoint 2 (enabled) set at 0x51c21b for cuckoohui/commands.(*CuckooFppCommand).Main() ./commands/cuckoo.go:43
使用continue 继续运行程序,使用n 步进
(dlv) continue
> main.main() ./main.go:12 (hits goroutine(1):1 total:1) (PC: 0x605813)
Warning: debugging optimized function
7: _ "cuckoohui/dotenv"
8: "github.com/mix-go/dotenv"
9: "github.com/mix-go/xcli"
10: )
11:
=> 12: func main() {
13: xcli.SetName("app").
14: SetVersion("0.0.0-alpha").
15: SetDebug(dotenv.Getenv("APP_DEBUG").Bool(false))
16: xcli.AddCommand(commands.Commands...).Run()
17: }
(dlv) n 5
> cuckoohui/commands.(*CuckooFppCommand).Main() ./commands/cuckoo.go:43 (hits goroutine(1):1 total:1) (PC: 0x51c21b)
Warning: debugging optimized function
38: }
39:
40: type CuckooFppCommand struct {
41: }
42:
=> 43: func (t *CuckooFppCommand) Main() {
44: count := flag.Match("c", "count").Int64(1024)
45: fpp := flag.Match("f", "fpp").Float64(0.01)
46:
47: cf := cuckoo.NewFilter(uint(count))
48: fmt.Printf("cuckoo cap : %d, fpp : %f\n", count, fpp)
(dlv) n
> cuckoohui/commands.(*CuckooFppCommand).Main() ./commands/cuckoo.go:44 (PC: 0x51c232)
Warning: debugging optimized function
39:
40: type CuckooFppCommand struct {
41: }
42:
43: func (t *CuckooFppCommand) Main() {
=> 44: count := flag.Match("c", "count").Int64(1024)
45: fpp := flag.Match("f", "fpp").Float64(0.01)
46:
47: cf := cuckoo.NewFilter(uint(count))
48: fmt.Printf("cuckoo cap : %d, fpp : %f\n", count, fpp)
49:
(dlv) n
> cuckoohui/commands.(*CuckooFppCommand).Main() ./commands/cuckoo.go:45 (PC: 0x51c358)
Warning: debugging optimized function
40: type CuckooFppCommand struct {
41: }
42:
43: func (t *CuckooFppCommand) Main() {
44: count := flag.Match("c", "count").Int64(1024)
=> 45: fpp := flag.Match("f", "fpp").Float64(0.01)
46:
47: cf := cuckoo.NewFilter(uint(count))
48: fmt.Printf("cuckoo cap : %d, fpp : %f\n", count, fpp)
49:
50: iCount := 0
打印变量
(dlv) locals
count = 10240000
(dlv) print buf
(unreadable read out of bounds)
(dlv) locals
count = 10240000
fpp = 0.01
cf = (unreadable empty OP stack)
iCount = 0
buf = (unreadable read out of bounds)
i = 0
(dlv) n
> cuckoohui/commands.(*CuckooFppCommand).Main() ./commands/cuckoo.go:56 (PC: 0x51c5bf)
Warning: debugging optimized function
51:
52: buf := make([]byte, 16)
53: for i := 0; i < int(count); i++ {
54: rand.Read(buf)
55:
=> 56: iSuccess := cf.InsertUnique(buf)
57: if iSuccess {
58: iCount++
59: }
60: }
61:
(dlv) buf
Command failed: command not available
(dlv) locals
count = 10240000
fpp = 0.01
cf = (unreadable empty OP stack)
iCount = 0
buf = []uint8 len: 824633802688, cap: 140725236128952, [...]
i = 0
(dlv) print buf
[]uint8 len: 824633802688, cap: 140725236128952, [251,22,63,226,157,174,90,125,18,85,77,146,190,80,18,250,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,...+824633802624 more]
(dlv) quit
step 进入函数调用内部 stepout 跳出函数调用
(dlv) n
> cuckoohui/commands.(*CuckooFppCommand).Main() ./commands/cuckoo.go:56 (PC: 0x51c5ad)
Warning: debugging optimized function
51:
52: buf := []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
53: for i := 0; i < int(count); i++ {
54: rand.Read(buf)
55:
=> 56: iSuccess := cf.InsertUnique(buf)
57: if iSuccess {
58: iCount++
59: }
60: }
61:
(dlv) step #进入cf.InsertUnique(buf)
> github.com/seiflotfy/cuckoofilter.(*Filter).InsertUnique() /home/going/workspace/golang/pkg/mod/github.com/seiflotfy/cuckoofilter@v0.0.0-20201222105146-bc6005554a0c/cuckoofilter.go:73 (PC: 0x5180d3)
Warning: debugging optimized function
68: }
69: return cf.reinsert(fp, randi(i1, i2))
70: }
71:
72: // InsertUnique inserts data into the counter if not exists and returns true upon success
=> 73: func (cf *Filter) InsertUnique(data []byte) bool {
74: if cf.Lookup(data) {
75: return false
76: }
77: return cf.Insert(data)
78: }
(dlv) n
> github.com/seiflotfy/cuckoofilter.(*Filter).InsertUnique() /home/going/workspace/golang/pkg/mod/github.com/seiflotfy/cuckoofilter@v0.0.0-20201222105146-bc6005554a0c/cuckoofilter.go:74 (PC: 0x5180e1)
Warning: debugging optimized function
69: return cf.reinsert(fp, randi(i1, i2))
70: }
71:
72: // InsertUnique inserts data into the counter if not exists and returns true upon success
73: func (cf *Filter) InsertUnique(data []byte) bool {
=> 74: if cf.Lookup(data) {
75: return false
76: }
77: return cf.Insert(data)
78: }
79:
(dlv) step #进入cf.Lookup(data)
> github.com/seiflotfy/cuckoofilter.(*Filter).Lookup() /home/going/workspace/golang/pkg/mod/github.com/seiflotfy/cuckoofilter@v0.0.0-20201222105146-bc6005554a0c/cuckoofilter.go:35 (PC: 0x517d33)
Warning: debugging optimized function
30: bucketPow: uint(bits.TrailingZeros(capacity)),
31: }
32: }
33:
34: // Lookup returns true if data is in the counter
=> 35: func (cf *Filter) Lookup(data []byte) bool {
36: i1, fp := getIndexAndFingerprint(data, cf.bucketPow)
37: if cf.buckets[i1].getFingerprintIndex(fp) > -1 {
38: return true
39: }
40: i2 := getAltIndex(fp, i1, cf.bucketPow)
(dlv) n
> github.com/seiflotfy/cuckoofilter.(*Filter).Lookup() /home/going/workspace/golang/pkg/mod/github.com/seiflotfy/cuckoofilter@v0.0.0-20201222105146-bc6005554a0c/cuckoofilter.go:36 (PC: 0x517d41)
Warning: debugging optimized function
31: }
32: }
33:
34: // Lookup returns true if data is in the counter
35: func (cf *Filter) Lookup(data []byte) bool {
=> 36: i1, fp := getIndexAndFingerprint(data, cf.bucketPow)
37: if cf.buckets[i1].getFingerprintIndex(fp) > -1 {
38: return true
39: }
40: i2 := getAltIndex(fp, i1, cf.bucketPow)
41: return cf.buckets[i2].getFingerprintIndex(fp) > -1
(dlv) stepout #退出函数调用
> github.com/seiflotfy/cuckoofilter.(*Filter).InsertUnique() /home/going/workspace/golang/pkg/mod/github.com/seiflotfy/cuckoofilter@v0.0.0-20201222105146-bc6005554a0c/cuckoofilter.go:74 (PC: 0x51810d)
Warning: debugging optimized function
Values returned:
~r1: (unreadable empty OP stack)
69: return cf.reinsert(fp, randi(i1, i2))
70: }
71:
72: // InsertUnique inserts data into the counter if not exists and returns true upon success
73: func (cf *Filter) InsertUnique(data []byte) bool {
=> 74: if cf.Lookup(data) {
75: return false
76: }
77: return cf.Insert(data)
78: }
79:
(dlv) stepout
> cuckoohui/commands.(*CuckooFppCommand).Main() ./commands/cuckoo.go:56 (PC: 0x51c5dd)
Warning: debugging optimized function
Values returned:
~r1: (unreadable empty OP stack)
51:
52: buf := []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
53: for i := 0; i < int(count); i++ {
54: rand.Read(buf)
55:
=> 56: iSuccess := cf.InsertUnique(buf)
57: if iSuccess {
58: iCount++
59: }
60: }
61:
(dlv)
NOTE
centos yum 源的delve 可能版本比较低, 无法调试go 1.16.
可以选择卸载了, 然后通过go 安装.可以选择一下两种方式:
- Clone the git repository and build:
git clone https://github.com/go-delve/delve
cd delve
go install github.com/go-delve/delve/cmd/dlv
- On Go version 1.16 or later, this command will also work:
go install github.com/go-delve/delve/cmd/dlv@latest
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