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Avoid regexp stack overflow in GDB string matching (bug#22149)

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* lisp/progmodes/gdb-mi.el (gdb--string-regexp):
Swap the or-clauses so that the rarely matching one comes first.
This avoids a build-up of backtrack points on the regexp stack.
This commit is contained in:
Mattias Engdegård 2020-03-13 19:51:02 +01:00
parent 6bdb561a3b
commit 7195ea7532
1 changed files with 4 additions and 1 deletions
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5
lisp/progmodes/gdb-mi.el
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@ -1046,7 +1046,10 @@ no input, and GDB is waiting for input."
(declare-function tooltip-show "tooltip" (text &optional use-echo-area))
(defconst gdb--string-regexp "\"\\(?:[^\\\"]\\|\\\\.\\)*\"")
(defconst gdb--string-regexp (rx "\""
(* (or (seq "\\" nonl)
(not (any "\"\\"))))
"\""))
(defun gdb-tooltip-print (expr)
(with-current-buffer (gdb-get-buffer 'gdb-partial-output-buffer)