thanks for replay, you said right, i have changed the code, its works fine,
thank you, here is code:
package main
import (
"fmt"
"runtime"
)
func test() {
var zero = 0
_ = 1 / zero
}
func Stack() {
var pc [16]uintptr
n := runtime.Callers(0, pc[:])
fmt.Println(n, pc)
callers := pc[:n]
frames := runtime.CallersFrames(callers)
for {
frame, more := frames.Next()
fmt.Printf("%s %s %d\n", frame.Function, frame.File, frame.Line)
if !more {
break
}
}
}
func main() {
defer func() {
if err := recover(); err != nil {
Stack()
///mt.Println()
}
}()
test()
}
在 2019年2月19日星期二 UTC+8上午8:29:29，Keith Randall写道：
>
> FuncForPC misses the test function because it is inlined. Using FuncForPC
> on the results of Callers does not work correctly in the presence of
> inlining. That is essentially why CallersFrames was introduced.
>
> The function name is missing because you're using the wrong expression for
> it. You should use frame.Function, not frame.Func.Name().
> // Func is the Func value of this call frame. This may be nil
> // for non-Go code or fully inlined functions.
> Name() returns "" for a nil *Func.
>
> BTW, You're not using the second return value of CallersFrames quite
> correctly. The second return value from Next is not an ok value, it is a
> "more" value. If the second result is false, the first result is still ok
> and should be used.
> In other words, swap your fmt.Printf and if !ok { break } statements.
>
> On Monday, February 18, 2019 at 11:52:52 AM UTC-8, qiaojia...@qq.com
> wrote:
>>
>> *What version of Go are you using (go version)?*
>> 1.9.3~latest version
>>
>> *What operating system and processor architecture are you using?*
>> x86-64
>>
>> *What did you do?*
>> test runtime.Callers function in a panic process, test code as below:
>>
>>
>> package main
>>
>> import (
>> "fmt"
>> "runtime"
>> )
>>
>> func test() {
>> var zero = 0
>> _ = 1/zero
>> }
>>
>> func Stack() {
>>
>> var pc [16]uintptr
>> n := runtime.Callers(0, pc[:])
>> fmt.Println(n,pc)
>> callers := pc[:n]
>> frames := runtime.CallersFrames(callers) //use CallersFrames
>> for {
>> frame, ok := frames.Next()
>> if !ok {
>> break
>> }
>> fmt.Printf("%s %s %d\n", frame.Func.Name(), frame.File, frame.Line)
>>
>> }
>>
>> fmt.Println("============================")
>> var name, file string
>> var line int
>> for _, pc := range pc[:n] {
>> fn := runtime.FuncForPC(pc) ////use FuncForPC
>> if fn == nil {
>> fmt.Println("fn = nil")
>> continue
>> }
>> file, line = fn.FileLine(pc)
>> name = fn.Name()
>> fmt.Printf("%s %s %d\n", name, file, line)
>> }
>> }
>>
>> func main() {
>> defer func(){
>> if err:=recover();err!=nil{
>> Stack()
>> ///mt.Println()
>> }
>> }()
>>
>> test()
>> }
>>
>>
>> *What did you expect to see?*
>> all stack dispalyed,like:
>>
>> *What did you see instead?*
>> miss some function missing.
>>
>> 9 [163520 878784 880704 556224 329504 323712 880512 341920 564417 0 0 0 0 0
>> 0 0]
>> runtime.Callers /usr/local/go/src/runtime/extern.go 218
>> main.Stack /tmp/sandbox512058979/main.go 16
>> main.main.func1 /tmp/sandbox512058979/main.go 47
>> runtime.call16 /usr/local/go/src/runtime/asm_amd64p32.s 392
>> runtime.gopanic /usr/local/go/src/runtime/panic.go 513
>> runtime.panicdivide /usr/local/go/src/runtime/panic.go 61
>> /tmp/sandbox512058979/main.go 10 --------- use
>> CallerFrames miss function name
>> main.main /tmp/sandbox512058979/main.go 52
>> runtime.main /usr/local/go/src/runtime/proc.go 201
>> ============================
>> runtime.Callers /usr/local/go/src/runtime/extern.go 218
>> main.Stack /tmp/sandbox512058979/main.go 16
>> main.main.func1 /tmp/sandbox512058979/main.go 47
>> runtime.call16 /usr/local/go/src/runtime/asm_amd64p32.s 392
>> runtime.gopanic /usr/local/go/src/runtime/panic.go 514
>> runtime.panicdivide /usr/local/go/src/runtime/panic.go 61main.main
>> /tmp/sandbox512058979/main.go 10 ---------- use FuncForPC
>> miss stack main.test, and this line number is wrong
>> runtime.main /usr/local/go/src/runtime/proc.go 210
>> runtime.goexit /usr/local/go/src/runtime/asm_amd64p32.s 524
>>
>>
>> *when i run program in debug mod, the result is OK.*
>> 10 [4223048 4818604 4821394 4518130 4363057 4358245 4818349
>> 4821271 4370786 4527169 0 0 0 0 0 0]
>>
>> runtime.Callers D:/Go/src/runtime/extern.go 212
>> main.Stack E:/Git/UDM/MicroServices/GoService/src/testactor/main.go 16
>> main.main.func1 E:/Git/UDM/MicroServices/GoService/src/testactor/main.go
>> 47
>> runtime.call32 D:/Go/src/runtime/asm_amd64.s 509
>> runtime.gopanic D:/Go/src/runtime/panic.go 491
>> runtime.panicdivide D:/Go/src/runtime/panic.go 42
>> main.test E:/Git/UDM/MicroServices/GoService/src/testactor/main.go 10
>> main.main E:/Git/UDM/MicroServices/GoService/src/testactor/main.go 52
>> runtime.main D:/Go/src/runtime/proc.go 195
>> ============================
>> runtime.Callers D:/Go/src/runtime/extern.go 212
>> main.Stack E:/Git/UDM/MicroServices/GoService/src/testactor/main.go 16
>> main.main.func1 E:/Git/UDM/MicroServices/GoService/src/testactor/main.go
>> 46
>> runtime.call32 D:/Go/src/runtime/asm_amd64.s 509
>> runtime.gopanic D:/Go/src/runtime/panic.go 492
>> runtime.panicdivide D:/Go/src/runtime/panic.go 42
>> main.test E:/Git/UDM/MicroServices/GoService/src/testactor/main.go 10
>> main.main E:/Git/UDM/MicroServices/GoService/src/testactor/main.go 53
>> runtime.main D:/Go/src/runtime/proc.go 204
>> runtime.goexit D:/Go/src/runtime/asm_amd64.s 2338
>>
>>
>>
>>
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