It's not a bug or a performance issue.
Just because I am about to have a long hoilday, so I want to learn some
knowledge about go compiler.
But as a newbie in assembly, I spent some time on Google but couldn't
understand this instruction.
在2023年9月27日星期三 UTC+8 12:43:05 写道：
> More context regardi
Related go code:
22 //go:noinline
23 func add(a, b int) int {
24 defer func() {
25 fmt.Println(3)
26 }()
27 return a + b
28 }
Build by: GOOS=linux GOARCH=amd64 go21 build main.go
Disassembler by: objdump -D -S main
Assembl
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On Tue, Sep 26, 2023 at 9:10 PM j2gg0s wrote:
>
> Already read it, I actually started here.
>
> What I can't understand is x64 rip-relative address.
>
> leaq132795(%rip), %rcx # 0x49b4e8
>
> why 132795, and what is loaded into rcx
It's a reference to another address in the program. The
More context regarding your question might help. Why are you trying to
understand the assembly code? Are you trying to debug a failure in the
wild? Are you trying to make the implementation more efficient? Are you
simply curious how the implementation works? Your question is rather broad
and likely
Thanks @lan
Already read it, I actually started here.
What I can't understand is x64 rip-relative address.
leaq132795(%rip), %rcx # 0x49b4e8
why 132795, and what is loaded into rcx
在2023年9月27日星期三 UTC+8 09:38:17 写道：
> On Tue, Sep 26, 2023 at 7:43 AM j2gg0s wrote:
> >
> > How to unde
Thanks all for the instructions.
I was initially thinking something closer to a single file like PDF.
However, I might get away with a web server, too. Thanks
On Tuesday, 26 September 2023 at 22:22:41 UTC+8 Pankaj Jangid wrote:
> go install golang.org/x/website/tour@latest
>
> On Tuesday, 26 Sept
On Tue, Sep 26, 2023 at 7:43 AM j2gg0s wrote:
>
> How to understand assmbly code ` 47ae26: 48 8d 0d bb 06 02 00 leaq
> 132795(%rip), %rcx # 0x49b4e8 `
The best place to start is
https://go.googlesource.com/proposal/+/refs/heads/master/design/34481-opencoded-defers.md
Ian
--
On Tue, Sep 26, 2023 at 3:32 AM sbezverk wrote:
>
> Thank you for your reply, I was under impression that prototype definitions
> come from C header files, and since the compilation phase completes with
> success, cgo finds all necessary function definitions. My problem is at the
> linking pha
Hi folks!
I updated the CL https://go-review.googlesource.com/c/go/+/413594 to fix
the finding of the LUCI bot. Please take another look :)
On Sun, Sep 10, 2023 at 6:49 PM Nagaev Boris wrote:
> Hi again :-)
>
> I addressed feedback in CL
> https://go-review.googlesource.com/c/go/+/413594
> Gene
Append:
49b4e8: c0 ae 47 00 00 00 00 shrb $0, 71(%rsi)
在2023年9月26日星期二 UTC+8 22:43:27 写道：
> How to understand assmbly code ` 47ae26: 48 8d 0d bb 06 02 00
> leaq132795(%rip), %rcx # 0x49b4e8 `
>
> Go code:
> ```
> //go:noinline
> func add(a, b int) int {
> def
On Tue, Sep 26, 2023 at 6:18 AM Jerry Londergaard
wrote:
>
>
> Do I need to be re-defining this interface everywhere? I guess
> an alternative would be to just re-use the `C.DoThinger`, but I feel like
> this doesn't seem right as now A is directly importing C, which seems to
> 'break' the abstr
How to understand assmbly code ` 47ae26: 48 8d 0d bb 06 02 00
leaq132795(%rip), %rcx # 0x49b4e8 `
Go code:
```
//go:noinline
func add(a, b int) int {
defer func() {
fmt.Println(3)
}()
return a + b
}
func main() {
add(10, 20)
}
``
Related question: is it possible to replace golang's "link" tool with "ld"? It
looks like "ld" has greater flexibility to address my requirements.
Thank you in advance for your guidance.
Serguei
On 26/09/23, 12:32, "sbezverk" mailto:sbezv...@gmail.com>> wrote:
Thank you for your reply, I was
On 25 Sep 2023, at 23:31, Corin Lawson wrote:
Fantastic work! I'm no authority on the subject of Go programming style but the
CheckErrors and OK pattern seems very unusual. Can you tell me the reasons for
that design choice?
The CheckErrors and OK pattern is there to make error checking in Go
go install golang.org/x/website/tour@latest
On Tuesday, 26 September 2023 at 11:59:57 UTC+5:30 王富民awaw wrote:
> Hi Friends of Go
>
> Is there an offline version of A Tour of Go?
> Could be in PDF or Powerpoint or preferably Go's beautiful present format.
>
> A quick Google search didn't reveal an
Hello,
Did you find a solution to this problem? I have the same problem with
weblist.
All the best,
Sergey
пятница, 24 июня 2022 г. в 15:27:11 UTC+3, Jochen Voss:
> Hello,
>
> For a while, the "weblist" command in go tool pprof has been broken for me
> ("list" still works). Is this a known
Hello,
I'm trying to understand if I'm going overboard with defining interfaces
where they are used (i.e am I re-defining them nu-necessarily). Here's an
example. The interface is passed down from A->B->C where C (and only C)
calls the DoThing() method of the interface:
---
The tour can be locally installed.
https://pkg.go.dev/golang.org/x/website/tour#section-readme
go get golang.org/x/tour
In the tour/ directory
go run .
Then local Tour of Go is here:
http://localhost:3999/
Am Dienstag, 26. September 2023 schrieb 王富民awaw :
> Hi Friends of Go
> Is there an offli
Thank you for your reply, I was under impression that prototype definitions
come from C header files, and since the compilation phase completes with
success, cgo finds all necessary function definitions. My problem is at the
linking phase when the linker by some reason tries to resolve ALL func
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