gmon/bb_exit_func.c

   1 /* Copyright (C) 1996, 1997 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 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_out.h>
  24 #include <sys/types.h>
  25
  26 #include <stdio.h>
  27 #include <strings.h>
  28
  29 /* structure emitted by -a */
  30 struct bb
  31   {
  32     long int zero_word;
  33     const char *filename;
  34     long int *counts;
  35     long int ncounts;
  36     struct bb *next;
  37     const unsigned long int *addresses;
  38   };
  39
  40 extern struct bb *__bb_head;    /* from gmon.c */
  41
  42 #define OUT_NAME        "gmon.out"
  43
  44
  45 void
  46 __bb_exit_func (void)
  47 {
  48   const int version = GMON_VERSION;
  49   struct gmon_hdr ghdr;
  50   struct bb *ptr;
  51   FILE *fp;
  52   fp = fopen (OUT_NAME, "wb");
  53   if (!fp)
  54     {
  55       perror (OUT_NAME);
  56       return;
  57     }
  58   bcopy (GMON_MAGIC, &ghdr.cookie[0], 4);
  59   bcopy (&version, &ghdr.version, sizeof (version));
  60   fwrite (&ghdr, sizeof (ghdr), 1, fp);
  61
  62   for (ptr = __bb_head; ptr != 0; ptr = ptr->next)
  63     {
  64       u_int ncounts = ptr->ncounts;
  65       u_char tag;
  66       u_int i;
  67
  68       tag = GMON_TAG_BB_COUNT;
  69       fwrite (&tag, sizeof (tag), 1, fp);
  70       fwrite (&ncounts, sizeof (ncounts), 1, fp);
  71
  72       for (i = 0; i < ncounts; ++i)
  73         {
  74           fwrite (&ptr->addresses[i], sizeof (ptr->addresses[0]), 1, fp);
  75           fwrite (&ptr->counts[i], sizeof (ptr->counts[0]), 1, fp);
  76         }
  77     }
  78   fclose (fp);
  79 }