gdb/testsuite/gdb.reverse/recursion.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2023-2024 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 /* Test GDB's ability to handle recursive functions when executing
  19    in reverse.  */
  20
  21 /* The recursive foo call must be the first line of the recursive
  22    function, to test that we're not stepping too much and skipping
  23    multiple calls when we should skip only one.  */
  24 int
  25 foo (int x)
  26 {
  27   if (x) return foo (x-1);
  28   return 0;
  29 }
  30
  31 int
  32 bar (int x)
  33 {
  34   int r = foo (x);
  35   return 2*r;
  36 }
  37
  38 int
  39 main ()
  40 {
  41   int i = bar (5);
  42   int j = foo (5);
  43   return 0;                     /* END OF MAIN */
  44 }