CODEWITHSUNDEEP
cemacs
ant2009
ant2009

Reputation: 22566

Can Emacs show me where a specific function is called?

Is there a way in Emacs to find out which other places in the code call a specific function? With my current setup (GNU emacs 23.1.1, C codebase), I normally have to search the whole codebase for the function name to see which other functions call it. It would be nice if I could efficiently display all the names of the functions that call this specific function that I'm looking at.

Upvotes: 15

Views: 6105

Answers (3)

Alex Ott
Alex Ott

Reputation: 87214

You can use semantic-symref function (C-c , G) from CEDET package. It can use GNU Global or CTags databases to find callers if they exist. It could also parse sources to find occurrences.

Upvotes: 12

Peter Miehle
Peter Miehle

Reputation: 6070

here is a snippet from my old .emacs file

it does: ask for thing to find from etags-tagfile (find-tag-tag) grep for it according to mode

(defun find-caller (tagname)
  "Find occurences of tagname in files in the current directory
matching extension of current file."
  (interactive (list (find-tag-tag "Find caller: ")))
  (let ((cmd "grep -n "))
    (cond
     ((member major-mode '(lisp-mode cmulisp-mode))
      (grep (concat cmd "-i '" tagname "' *.lisp")))
     ((eq major-mode 'c-mode)
      (grep (concat cmd "'" tagname "' *.[ch]")))
     ((member major-mode '(latex-mode tex-mode))
      (grep (concat cmd "-i '" tagname "' *.tex")))
     ((eq major-mode 'emacs-lisp-mode)
      (grep (concat cmd "'" tagname "' *.el")))
     (t (grep (concat cmd "'" tagname "' *"))))))

Upvotes: 1

malana
malana

Reputation: 5230

I use xcscope for this. It's a library that makes Emacs interact with the external cscope tool.

After setup, you can use cscope-find-functions-calling-this-function to get a list of source code destinations that call a certain function.

http://www-inst.eecs.berkeley.edu/~cs186/fa05/debugging/xcscope.el http://www.emacswiki.org/emacs/CScopeAndEmacs

Upvotes: 2

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