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Re: [PATCH]: Re: Early backtrace.
From: |
Alan Mackenzie |
Subject: |
Re: [PATCH]: Re: Early backtrace. |
Date: |
Tue, 1 Feb 2022 19:14:49 +0000 |
Hello, Stefan.
On Sun, Jan 30, 2022 at 11:31:30 -0500, Stefan Monnier wrote:
> Alan Mackenzie [2022-01-30 11:07:32] wrote:
[ .... ]
> > Are there any objections to me committing this to master?
> See my comments below.
[ .... dealt with by your subsequent post .... ]
> > (defalias 'debug-early-backtrace
> > #'(lambda ()
> > "Print a trace of Lisp function calls currently active.
> > The output stream used is the value of `standard-output'.
> > This is a simplified version of the standard `backtrace'
> > function, intended for use in debugging the early parts
> > of the build process."
> > (princ "\n")
> > (mapbacktrace
> > #'(lambda (evald func args _flags)
> > (let ((args args))
> > (if evald
> > (progn
> > (princ " ")
> > (prin1 func)
> > (princ " (")
> > (while args
> > (prin1 (car args))
> > (setq args (cdr args))
> > (if args
> > (princ " ")))
> > (princ ")\n"))
> > (while args
> > (princ " ")
> > (prin1 (car args))
> > (princ "\n")
> > (setq args (cdr args)))))))))
> > (defalias 'debug-early
> > #'(lambda (&rest args)
> > "Print a trace of Lisp function calls currently active.
> > The output stream used is the value of `standard-output'.
> > There should be two ARGS, the symbol `error' and a cons of
> > the error symbol and its data.
> > This is a simplified version of `debug', intended for use
> > in debugging the early parts of the build process."
> > (princ "\nError: ")
> > (prin1 (car (car (cdr args)))) ; The error symbol.
> > (princ " ")
> > (prin1 (cdr (car (cdr args)))) ; The error data.
> > (debug-early-backtrace)))
> I'm curious: why did you split this into two functions?
Since debug-early-backtrace is potentially useful in its own right, just
as backtrace is.
> > (setq debugger #'debug-early)
> Could we make `debug-early` the default/initial value of `debugger` in
> the C code, so that reloading `debug-early.el` can be done safely?
I'm not sure what you're asking here. Do you mean set Vdebugger to
debug-early in syms_of_eval? How would that make reloading
debug-early.el safe?
> Stefan
--
Alan Mackenzie (Nuremberg, Germany).
- Re: [PATCH]: Re: Early backtrace.,
Alan Mackenzie <=
- Re: [PATCH]: Re: Early backtrace., Stefan Monnier, 2022/02/01
- Re: [PATCH]: Re: Early backtrace., Alan Mackenzie, 2022/02/02
- Re: [PATCH]: Re: Early backtrace., Stefan Monnier, 2022/02/02
- Re: [PATCH]: Re: Early backtrace., Eli Zaretskii, 2022/02/03
- Re: [PATCH]: Re: Early backtrace., Alan Mackenzie, 2022/02/03
- Re: [PATCH]: Re: Early backtrace., Eli Zaretskii, 2022/02/04
- Re: [PATCH]: Re: Early backtrace., Alan Mackenzie, 2022/02/04
- Re: [PATCH]: Re: Early backtrace., Eli Zaretskii, 2022/02/05
- Re: [PATCH]: Re: Early backtrace., Alan Mackenzie, 2022/02/05
- Re: [PATCH]: Re: Early backtrace., Stefan Monnier, 2022/02/04