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 sx_burncpu ();
      26  
      27  int
      28  sx_cputime ()
      29  {
      30    wlog ("start of sx_cputime", NULL);
      31  
      32    /* put a memory leak in here */
      33    (void) malloc (13);
      34  
      35    fprintf (stderr, "sx_burncpu @ %p\n", sx_burncpu);
      36    sx_burncpu ();
      37    wlog ("end of sx_cputime", NULL);
      38    return 13;
      39  }
      40  
      41  void sx_init () __attribute__ ((constructor));
      42  
      43  void
      44  sx_init ()
      45  {
      46    fprintf (stderr, "sx_init executed\n");
      47  }
      48  
      49  /* sx_burncpu - loop to use a bunch of user time */
      50  void
      51  sx_burncpu ()
      52  {
      53    hrtime_t start = gethrtime ();
      54    hrtime_t vstart = gethrvtime ();
      55    volatile float x = 0.;    /* temp variable for f.p. calculation */
      56    long long count = 0;
      57    do
      58      {
      59        x = 0.0;
      60        for (int j = 0; j < 100000; j++)
      61          x = x + 1.0;
      62        count++;
      63      }
      64    while (start + testtime * 1e9 > gethrtime ());
      65  
      66    fprintf (stderr, "   Performed %lld while-loop iterations\n", count);
      67    whrvlog (gethrtime () - start, gethrvtime () - vstart, "sx_burncpu", NULL);
      68  }