gdb/testsuite/gdb.base/step-bt.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2006-2021 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 <stdio.h>
  19
  20 void
  21 hello (void)
  22 {
  23   printf ("Hello world.\n");
  24 }
  25
  26 /* The test case uses "break *hello" to make sure to step at the very
  27    first instruction of the function.  This causes a problem running
  28    the test on powerpc64le-linux, since the first instruction belongs
  29    to the global entry point prologue, which is skipped when doing a
  30    local direct function call.  To make sure that first instruction is
  31    indeed being executed and the breakpoint hits, we make sure to call
  32    the routine via an indirect call.  */
  33 void (*ptr) (void) = hello;
  34
  35 int
  36 main (void)
  37 {
  38   ptr ();
  39
  40   return 0;
  41 }