gdb/testsuite/gdb.reverse/step-reverse.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2008-2019 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 #include <stdlib.h>
  19 #include <string.h>
  20
  21 /* Test various kinds of stepping.
  22 */
  23 int myglob = 0;
  24
  25 int callee() {          /* ENTER CALLEE */
  26   myglob++; return 0;   /* ARRIVED IN CALLEE */
  27 }                       /* RETURN FROM CALLEE */
  28
  29 /* A structure which, we hope, will need to be passed using memcpy.  */
  30 struct rhomboidal {
  31   int rather_large[100];
  32 };
  33
  34 void
  35 large_struct_by_value (struct rhomboidal r)
  36 {
  37   myglob += r.rather_large[42]; /* step-test.exp: arrive here 1 */
  38 }
  39
  40 int main () {
  41    int w,x,y,z;
  42    int a[10], b[10];
  43
  44    /* Test "next" and "step" */
  45    w = 0;       /* BREAK AT MAIN */
  46    x = 1;       /* NEXT TEST 1 */
  47    y = 2;       /* STEP TEST 1 */
  48    z = 3;       /* REVERSE NEXT TEST 1 */
  49    w = w + 2;   /* NEXT TEST 2 */
  50    x = x + 3;   /* REVERSE STEP TEST 1 */
  51    y = y + 4;
  52    z = z + 5;   /* STEP TEST 2 */
  53
  54    /* Test that "next" goes over a call */
  55    callee();    /* NEXT OVER THIS CALL */
  56
  57    /* Test that "step" doesn't */
  58    callee();    /* STEP INTO THIS CALL */
  59
  60    /* Test "stepi" */
  61    a[5] = a[3] - a[4]; /* FINISH TEST */
  62    callee();    /* STEPI TEST */
  63
  64    /* Test "nexti" */
  65    callee();    /* NEXTI TEST */
  66
  67    y = w + z;
  68
  69    {
  70      struct rhomboidal r;
  71      memset (r.rather_large, 0, sizeof (r.rather_large));
  72      r.rather_large[42] = 10;
  73      large_struct_by_value (r);  /* step-test.exp: large struct by value */
  74    }
  75
  76    exit (0); /* end of main */
  77 }
  78