gdb/testsuite/gdb.dwarf2/implptr.c

   1 /* Copyright (C) 2010-2019 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   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 /* The original program corresponding to implptr.S.
  19    This came from Jakub's gcc-patches email implementing
  20    DW_OP_GNU_implicit_pointer.
  21    Note that it is not ever compiled, implptr.S is used instead.
  22    However, it is used to extract breakpoint line numbers.  */
  23
  24 struct S
  25 {
  26   int *x, y;
  27 };
  28
  29 int u[6];
  30
  31 static inline void
  32 add (struct S *a, struct S *b, int c)
  33 {
  34   *a->x += *b->x;               /* baz breakpoint */
  35   a->y += b->y;
  36   u[c + 0]++;
  37   a = (struct S *) 0;
  38   u[c + 1]++;
  39   a = b;
  40   u[c + 2]++;
  41 }
  42
  43 int
  44 foo (int i)
  45 {
  46   int j = i;
  47   struct S p[2] = { {&i, i * 2}, {&j, j * 2} };
  48   add (&p[0], &p[1], 0);
  49   p[0].x = &j;
  50   p[1].x = &i;
  51   add (&p[0], &p[1], 3);
  52   return i + j;                 /* foo breakpoint */
  53 }
  54
  55 typedef int *intp;
  56 typedef intp *intpp;
  57 typedef intpp *intppp;
  58
  59 int __attribute__ ((noinline, used, noclone))
  60 bar (int i)
  61 {
  62   intp j = &i;
  63   intpp k = &j;
  64   intppp l = &k;
  65   i++;                          /* bar breakpoint */
  66   return i;
  67 }
  68
  69 int main ()
  70 {
  71   return bar(5) + foo (23);
  72 }