Was the code built with optimizations disabled?
On Tuesday, July 27, 2021 at 1:57:17 PM UTC-4 林 子鹏 wrote:
> When I use delve to debug this project(dlv debug t.go):
>
> //t.gopackage main
> import (
> "fmt"
> "os"
> "reflect"
> "unsafe"
> )
> func main() {
> s1 := make([]uint8, 0)
> aboutSlice(&s1, "s1")
> s2 := make([]uint8, 8)
> aboutSlice(&s2, "s2")
> new_s1 := append(s1, 10)
> new_s2 := append(s2, 20)
> aboutSlice(&new_s1, "new_s1")
> aboutSlice(&new_s2, "new_s2")
> os.Exit(0)
> }
> func aboutSlice(s *[]uint8, n string) {
> fmt.Printf("%s:\tmem_addr:%p\tsize:%v\taddr:%#x\tlen:%v\tcap:%v\n", n, s,
> unsafe.Sizeof(*s), (*reflect.SliceHeader)(unsafe.Pointer(s)).Data, len(*s),
> cap(*s))
> }
>
> I want to analyze the behavior of function growslice(in
> runtime/slice.go),and then set breakpoints on func growslice,I use n and s
> to analyze it, but it will skip some step, like the picture below:
>
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