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From: Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups: gmane.emacs.help
Subject: Re: Look for strace/ltrace analog for elisp.
Date: Sun, 13 May 2012 10:34:04 -0400
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> I expect ability to call something like::

>   (trace BODY)

> and get output like::

>   { foo
>   *{ bar
>   **{ concat
>   **} concat: result: "XXX"
>   **{ +
>   **} +: result: 20
>   *} bar: result: 20
>   } foo: result: 20

We don't really have this kind of `trace' function.  Instead we have
`trace-function'.  So if you called trace-function on `foo', `bar',
`concat', and `+', then (eval BODY) would have put a trace like the one
you show in *trace-output*.


        Stefan