That debugging is (now) in the runtime package, which is (always) compiled
with optimizations on.
That will tend to interfere with debugging. The 1.17 change to use
registers for passing parameters
has also caused some regressions in debugging quality (and it would be nice
to fix those, but it is tricky).
On Tuesday, July 27, 2021 at 6:26:19 PM UTC-4 jake...@gmail.com wrote:
> 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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