1  /* Test program for profiling information collection (_mcount/gprof).
       2     Copyright (C) 2017-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library 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 GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  /* This program does not use the test harness because we want tight
      20     control over the call graph.  */
      21  
      22  __attribute__ ((noinline, noclone, weak)) void
      23  f1 (void)
      24  {
      25  }
      26  
      27  __attribute__ ((noinline, noclone, weak)) void
      28  f2 (void)
      29  {
      30    f1 ();
      31    /* Prevent tail call.  */
      32    asm volatile ("");
      33  }
      34  
      35  __attribute__ ((noinline, noclone, weak)) void
      36  f3 (int count)
      37  {
      38    for (int i = 0; i < count; ++i)
      39      {
      40        f1 ();
      41        f2 ();
      42      }
      43  }
      44  
      45  int
      46  main (void)
      47  {
      48    f3 (1000);
      49    return 0;
      50  }