gmon/bb_exit_func.c

   1 /* Copyright (C) 1996-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by David Mosberger (davidm@cs.arizona.edu).
   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    <http://www.gnu.org/licenses/>.  */
  18
  19 /* __bb_exit_func() dumps all the basic-block statistics linked into
  20    the __bb_head chain to .d files.  */
  21
  22 #include <sys/gmon.h>
  23 #include <sys/gmon_out.h>
  24 #include <sys/types.h>
  25
  26 #include <stdio.h>
  27 #include <stdio_ext.h>
  28 #include <string.h>
  29
  30 #define OUT_NAME        "gmon.out"
  31
  32
  33 extern struct __bb *__bb_head attribute_hidden;
  34
  35
  36 void
  37 __bb_exit_func (void)
  38 {
  39   const int version = GMON_VERSION;
  40   struct gmon_hdr ghdr;
  41   struct __bb *ptr;
  42   FILE *fp;
  43   fp = fopen (OUT_NAME, "wb");
  44   if (!fp)
  45     {
  46       perror (OUT_NAME);
  47       return;
  48     }
  49   /* No threads use this stream.  */
  50   __fsetlocking (fp, FSETLOCKING_BYCALLER);
  51
  52   memcpy (&ghdr.cookie[0], GMON_MAGIC, 4);
  53   memcpy (&ghdr.version, &version, sizeof (version));
  54   fwrite_unlocked (&ghdr, sizeof (ghdr), 1, fp);
  55
  56   for (ptr = __bb_head; ptr != 0; ptr = ptr->next)
  57     {
  58       u_int ncounts = ptr->ncounts;
  59       u_char tag;
  60       u_int i;
  61
  62       tag = GMON_TAG_BB_COUNT;
  63       fwrite_unlocked (&tag, sizeof (tag), 1, fp);
  64       fwrite_unlocked (&ncounts, sizeof (ncounts), 1, fp);
  65
  66       for (i = 0; i < ncounts; ++i)
  67         {
  68           fwrite_unlocked (&ptr->addresses[i], sizeof (ptr->addresses[0]), 1,
  69                            fp);
  70           fwrite_unlocked (&ptr->counts[i], sizeof (ptr->counts[0]), 1, fp);
  71         }
  72     }
  73   fclose (fp);
  74 }