1  /* Copyright (C) 2021-2023 Free Software Foundation, Inc.
       2     Contributed by Oracle.
       3  
       4     This file is part of GNU Binutils.
       5  
       6     This program is free software; you can redistribute it and/or modify
       7     it under the terms of the GNU General Public License as published by
       8     the Free Software Foundation; either version 3, or (at your option)
       9     any later version.
      10  
      11     This program is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14     GNU General Public License for more details.
      15  
      16     You should have received a copy of the GNU General Public License
      17     along with this program; if not, write to the Free Software
      18     Foundation, 51 Franklin Street - Fifth Floor, Boston,
      19     MA 02110-1301, USA.  */
      20  
      21  #include <stdio.h>
      22  #include <stdlib.h>
      23  #include "stopwatch.h"
      24  
      25  static void so_burncpu ();
      26  
      27  int
      28  so_cputime ()
      29  {
      30    wlog ("start of so_cputime", NULL);
      31  
      32    /* put a memory leak in here */
      33    (void) malloc (13);
      34  
      35    fprintf (stderr, "so_burncpu @ %p\n", so_burncpu);
      36    so_burncpu ();
      37  
      38    wlog ("end of so_cputime", NULL);
      39    return 13;
      40  }
      41  
      42  void so_init () __attribute__ ((constructor));
      43  
      44  void
      45  so_init ()
      46  {
      47    fprintf (stderr, "so_init executed\n");
      48  }
      49  
      50  /*	so_burncpu - loop to use a bunch of user time */
      51  void
      52  so_burncpu ()
      53  {
      54    hrtime_t start = gethrtime ();
      55    hrtime_t vstart = gethrvtime ();
      56    volatile float x = 0.;     /* temp variable for f.p. calculation */
      57    long long count = 0;
      58    do
      59      {
      60        x = 0.0;
      61        for (int j = 0; j < 100000; j++)
      62          x = x + 1.0;
      63        count++;
      64      }
      65    while (start + testtime * 1e9 > gethrtime ());
      66  
      67    fprintf (stderr, "   Performed %lld while-loop iterations\n", count);
      68    whrvlog (gethrtime () - start, gethrvtime () - vstart, "so_burncpu", NULL);
      69  }