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Two fixes in dwarf-mode.el

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This fixes a couple of small problems in dwarf-mode.el.

First, I noticed that for an attribute like:

 <2><136c>: Abbrev Number: 11 (DW_TAG_member)
    <136d>   DW_AT_name        : t

... the "t" would not be font-locked using the function name face.
The problem here is that the regexp assumed the indirect string
format, like:

    <12ac>   DW_AT_name        : (indirect string, offset: 0x1b40): whatever

Here the fix is to adjust the regexp to match both formats.

Second, when following a DIE reference, point could end up on an
attribute instead.  This happens when there is a zero-length attribute
with the same "offset" as the following DIE, like:

    <12c5>   DW_AT_GNU_all_call_sites: 1
 <2><12c5>: Abbrev Number: 5 (DW_TAG_formal_parameter)

Here the fix is to search for the DIE by looking for the depth ("<2>"
in the example) as well.

I've bumped the internal version number to make it simpler to install
this using the Emacs package facility.

binutils/ChangeLog
2020-08-12  Tom Tromey  <tromey@adacore.com>

	* dwarf-mode.el (Version): Now 1.6.
	(dwarf-die-button-action): Tighten DIE reference regexp.
	(dwarf-font-lock-keywords): Update name regexp.
This commit is contained in:
Tom Tromey 2020-08-12 08:41:03 -06:00
parent 404ec93359
commit d3511b24ea
2 changed files with 13 additions and 5 deletions
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12
binutils/dwarf-mode.el
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@ -1,6 +1,6 @@
;;; dwarf-mode.el --- Browser for DWARF information. -*-lexical-binding:t-*-
;; Version: 1.5
;; Version: 1.6
;; Copyright (C) 2012-2020 Free Software Foundation, Inc.
@ -27,7 +27,7 @@
(defconst dwarf-font-lock-keywords
'(
;; Name and linkage name.
("DW_AT_[a-z_]*name\\s *: .*:\\(.*\\)\\s *$"
("DW_AT_[a-zA-Z_]*name\\s *:\\(?:\\s *(.*):\\)?\\s *\\(.*\\)\\s *$"
(1 font-lock-function-name-face))
("Compilation Unit @ offset 0x[0-9a-f]+"
@ -120,9 +120,11 @@ A prefix argument means expand all children."
;; Either follows a DIE reference, or expands a "...".
(defun dwarf-die-button-action (button)
(let* ((die (button-get button 'die))
;; Note that the first number can only be decimal.
(die-rx (concat "^\\s *\\(<[0-9]+>\\)?<"
die ">[^<]"))
;; Note that the first number can only be decimal. It is
;; included in this search because otherwise following a ref
;; might lead to a zero-length boolean attribute in the
;; previous DIE.
(die-rx (concat "^\\s *<[0-9]+><" die ">:"))
(old (point))
(is-ref (button-get button 'die-ref)))
(if is-ref