gdb/testsuite/gdb.python/py-auto-load-chaining.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2021-2022 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 <unistd.h>
  20 #include <sys/mman.h>
  21 #include <stdio.h>
  22
  23 /* These will hold the addresses for two memory regions.  */
  24
  25 void *region_1;
  26 void *region_2;
  27
  28 /* Allocate a page of memory using mmap, and return a pointer.  */
  29
  30 void *
  31 allocate_page (void)
  32 {
  33   void *addr;
  34   int pgsize = sysconf(_SC_PAGE_SIZE);
  35   addr = mmap (NULL, pgsize, PROT_EXEC | PROT_READ | PROT_WRITE,
  36                MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  37   if (addr == MAP_FAILED)
  38     perror ("mmap");
  39 }
  40
  41 /* Only called so we can create a breakpoint.  */
  42
  43 void
  44 breakpt (void)
  45 {
  46   /* Nothing.  */
  47 }
  48
  49 /* The test.  */
  50
  51 int
  52 main (void)
  53 {
  54   region_1 = allocate_page ();
  55   region_2 = allocate_page ();
  56
  57   breakpt ();   /* Break Here.  */
  58 }