get backtrace of handle-switch-frame

get backtrace of handle-switch-frame

[Amos Bird]

Hello, is it possble to get the backtrace of function 
`handle-switch-frame` so that I can find out the cause of an 
unexpected frame switch event?

regards,

--
Amos Bird
amosbird@gmail.com

রে: get backtrace of handle-switch-frame

[Ghosh, Partha]

[-- Attachment #1: Type: text/plain, Size: 1054 bytes --]

Dear Amos,

Please excuse my ignorance.....

I do not know how to get the backtrace of function
`handle-switch-frame`

 When I tried it on the emacs window as M-x handle-switch-frame, it told me that handle-switch-frame must be bound to an event with parameters.

If possible, please can you tell me what should I do, and then I shall surely revert back.

With all the very best wishes and regards,

partha

------

পার্থ প্রতিম ঘোষ

[cid:81b610c9-3c4c-41cf-a099-dd9bef3d762b]
________________________________
থেকে: Amos Bird <amosbird@gmail.com>-এর পক্ষ থেকে help-gnu-emacs <help-gnu-emacs-bounces+ghoshpp=unisa.ac.za@gnu.org>
পাঠান: 24 মার্চ 2019 20.21
প্রতি: Help Gnu Emacs mailing list
বিষয়: get backtrace of handle-switch-frame

Hello, is it possble to get the backtrace of function
`handle-switch-frame` so that I can find out the cause of an
unexpected frame switch event?

regards,

--
Amos Bird
amosbird@gmail.com


[-- Attachment #2: Outlook-cotl01sx.jpg --]
[-- Type: image/jpeg, Size: 64417 bytes --]

Re: get backtrace of handle-switch-frame

[Eli Zaretskii]

> From: Amos Bird <amosbird@gmail.com>
> Date: Mon, 25 Mar 2019 02:21:32 +0800
> 
> Hello, is it possble to get the backtrace of function 
> `handle-switch-frame` so that I can find out the cause of an 
> unexpected frame switch event?

I think you should be able to use debug-on-entry for that purpose.

রে: get backtrace of handle-switch-frame

[Ghosh, Partha]

[-- Attachment #1: Type: text/plain, Size: 1515 bytes --]

Dear Eli,

I did not get any input on the *Backtrace* buffer after I entered M-x debug-on-entry RET handle-switch-frame RET

Please find the output from emacs --debug-init:
********* output from emacs --debug-init**************
Debugger entered--Lisp error: (file-missing "Cannot open load file" "No such file or directory" "e2wm")
  require(e2wm)
  eval-buffer(#<buffer  *load*> nil "/home/partha/.emacs" nil t)  ; Reading at buffer position 697
  load-with-code-conversion("/home/partha/.emacs" "/home/partha/.emacs" t t)
  load("~/.emacs" t t)
  #f(compiled-function () #<bytecode 0x255119>)()
  command-line()
  normal-top-level()
*******************************************************************

With all the very best wishes and regards,

partha

------

পার্থ প্রতিম ঘোষ

[cid:1c75408b-925b-44ac-81a4-173726b843f1]
________________________________
থেকে: Eli Zaretskii <eliz@gnu.org>-এর পক্ষ থেকে help-gnu-emacs <help-gnu-emacs-bounces+ghoshpp=unisa.ac.za@gnu.org>
পাঠান: 24 মার্চ 2019 20.51
প্রতি: help-gnu-emacs@gnu.org
বিষয়: Re: get backtrace of handle-switch-frame

> From: Amos Bird <amosbird@gmail.com>
> Date: Mon, 25 Mar 2019 02:21:32 +0800
>
> Hello, is it possble to get the backtrace of function
> `handle-switch-frame` so that I can find out the cause of an
> unexpected frame switch event?

I think you should be able to use debug-on-entry for that purpose.


[-- Attachment #2: Outlook-3aql21gp.jpg --]
[-- Type: image/jpeg, Size: 64417 bytes --]

Re: রে: get backtrace of handle-switch-frame

[Eli Zaretskii]

> From: "Ghosh, Partha" <Ghoshpp@unisa.ac.za>
> Date: Sun, 24 Mar 2019 19:39:31 +0000
> 
> I did not get any input on the *Backtrace* buffer after I entered M-x debug-on-entry RET handle-switch-frame
> RET
> 
> Please find the output from emacs --debug-init:
> ********* output from emacs --debug-init**************
> Debugger entered--Lisp error: (file-missing "Cannot open load file" "No such file or directory" "e2wm")
>   require(e2wm)
>   eval-buffer(#<buffer  *load*> nil "/home/partha/.emacs" nil t)  ; Reading at buffer position 697
>   load-with-code-conversion("/home/partha/.emacs" "/home/partha/.emacs" t t)
>   load("~/.emacs" t t)
>   #f(compiled-function () #<bytecode 0x255119>)()
>   command-line()
>   normal-top-level()
> *******************************************************************

What do you mean by "get any input"?   What kind of input did youwant
or expect to get?

Re: get backtrace of handle-switch-frame

[Stefan Monnier]

> Hello, is it possble to get the backtrace of function `handle-switch-frame`
> so that I can find out the cause of an unexpected frame switch event?

I'm not completely sure what you mean by "the backtrace of function
<...>", but I assume you want to get the backtrace at the point where
the function is called.
`M-x debug-on-entry RET handle-switch-frame RET` should do just that.

But I think you'll be very disappointed with the result: this is
a function bound to an event, and these are decoupled from the code that
generates/triggers the event by a buffer (this is the buffer that's used
to remember the keys you pressed while a long-running command is still
ongoing).

So the backtrace will likely tell you very little and specifically it
will not tell you the cause of the unexpected frame switch event.


        Stefan