gdb/testsuite/gdb.reverse/machinestate.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2008-2024 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 /*
  19  * Test restoration of machine state
  20  */
  21
  22 extern void hide (int);
  23
  24 /* Test register variable
  25    Requires -- compiler honors 'register'.  */
  26
  27 void
  28 register_state (void)
  29 {
  30   register int a = 0;
  31
  32   hide (a);     /* External function to defeat optimization.  */
  33   a++;          /* register_state: set breakpoint here */
  34   hide (a);     /* register post-change */
  35 }
  36
  37 /* Test auto variable (whatever that means).  */
  38
  39 void
  40 auto_state (void)
  41 {
  42   auto int a = 0;
  43
  44   hide (a);     /* External function to defeat optimization.  */
  45   a++;          /* auto_state: set breakpoint here */
  46   hide (a);     /* auto post-change */
  47 }
  48
  49 /* Test function-static variable.  */
  50
  51 void
  52 function_static_state (void)
  53 {
  54   static int a = 0;
  55
  56   hide (a);     /* External function to defeat optimization.  */
  57   a++;          /* function_static_state: set breakpoint here */
  58   hide (a);     /* function static post-change */
  59 }
  60
  61 /* Test module-static variable.  */
  62
  63 static int astatic;
  64
  65 void
  66 module_static_state (void)
  67 {
  68   astatic = 0;
  69
  70   hide (astatic);       /* External function to defeat optimization.  */
  71   astatic++;            /* module_static_state: set breakpoint here */
  72   hide (astatic);       /* module static post-change */
  73 }
  74
  75 /* Test module-global variable.  */
  76
  77 int aglobal;
  78
  79 void
  80 module_global_state (void)
  81 {
  82   aglobal = 0;
  83
  84   hide (aglobal);       /* External function to defeat optimization.  */
  85   aglobal++;            /* module_global_state: set breakpoint here */
  86   hide (aglobal);       /* module global post-change */
  87 }
  88
  89 /* main test driver */
  90
  91 int
  92 main (int argc, char **argv)
  93 {
  94   register_state ();    /* begin main */
  95   auto_state ();
  96   function_static_state ();
  97   module_static_state ();
  98   module_global_state ();
  99
 100   return 0;             /* end main */
 101 }