gdb/testsuite/gdb.btrace/tailcall-only.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2016-2020 Free Software Foundation, Inc.
   4
   5    Contributed by Intel Corp. <markus.t.metzger@intel.com>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 static __attribute__ ((noinline)) int
  21 bar_1 (void)
  22 {
  23   return 42;
  24 }
  25
  26 static __attribute__ ((noinline)) int
  27 bar (void)
  28 {
  29   return bar_1 ();
  30 }
  31
  32 static __attribute__ ((noinline)) int
  33 foo_1 (void)
  34 {
  35   return bar ();
  36 }
  37
  38 static __attribute__ ((noinline)) int
  39 foo (void)
  40 {
  41   return foo_1 ();
  42 }
  43
  44 int
  45 main (void)
  46 {
  47   int answer;
  48
  49   answer = foo ();
  50   answer += 1;
  51
  52   return answer;
  53 }