gmon/bb_exit_func.c

   1 /* Copyright (C) 1996,1997,1998,2000,2001,2002 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 /* __bb_exit_func() dumps all the basic-block statistics linked into
  21    the __bb_head chain to .d files.  */
  22
  23 #include <sys/gmon.h>
  24 #include <sys/gmon_out.h>
  25 #include <sys/types.h>
  26
  27 #include <stdio.h>
  28 #include <stdio_ext.h>
  29 #include <string.h>
  30
  31 #define OUT_NAME        "gmon.out"
  32
  33
  34 extern struct __bb *__bb_head attribute_hidden;
  35
  36
  37 void
  38 __bb_exit_func (void)
  39 {
  40   const int version = GMON_VERSION;
  41   struct gmon_hdr ghdr;
  42   struct __bb *ptr;
  43   FILE *fp;
  44   fp = fopen (OUT_NAME, "wb");
  45   if (!fp)
  46     {
  47       perror (OUT_NAME);
  48       return;
  49     }
  50   /* No threads use this stream.  */
  51   __fsetlocking (fp, FSETLOCKING_BYCALLER);
  52
  53   memcpy (&ghdr.cookie[0], GMON_MAGIC, 4);
  54   memcpy (&ghdr.version, &version, sizeof (version));
  55   fwrite_unlocked (&ghdr, sizeof (ghdr), 1, fp);
  56
  57   for (ptr = __bb_head; ptr != 0; ptr = ptr->next)
  58     {
  59       u_int ncounts = ptr->ncounts;
  60       u_char tag;
  61       u_int i;
  62
  63       tag = GMON_TAG_BB_COUNT;
  64       fwrite_unlocked (&tag, sizeof (tag), 1, fp);
  65       fwrite_unlocked (&ncounts, sizeof (ncounts), 1, fp);
  66
  67       for (i = 0; i < ncounts; ++i)
  68         {
  69           fwrite_unlocked (&ptr->addresses[i], sizeof (ptr->addresses[0]), 1,
  70                            fp);
  71           fwrite_unlocked (&ptr->counts[i], sizeof (ptr->counts[0]), 1, fp);
  72         }
  73     }
  74   fclose (fp);
  75 }