gmon/bb_exit_func.c

   1 /* Copyright (C) 1996 Free Software Foundation, Inc.
   2    Contributed by David Mosberger (davidm@cs.arizona.edu).
   3
   4 This file is part of the GNU C Library.
   5
   6 The GNU C Library is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU Library General Public License as
   8 published by the Free Software Foundation; either version 2 of the
   9 License, or (at your option) any later version.
  10
  11 The GNU C Library 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 GNU
  14 Library General Public License for more details.
  15
  16 You should have received a copy of the GNU Library General Public
  17 License along with the GNU C Library; see the file COPYING.LIB.  If
  18 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  19 Cambridge, MA 02139, USA.  */
  20
  21 /* __bb_exit_func() dumps all the basic-block statistics linked into
  22    the bb_head chain to .d files.  */
  23
  24 #include <sys/gmon_out.h>
  25 #include <sys/types.h>
  26
  27 #include <ansidecl.h>
  28 #include <stdio.h>
  29 #include <strings.h>
  30
  31 /* structure emitted by -a */
  32 struct bb {
  33   long                  zero_word;
  34   const char            *filename;
  35   long                  *counts;
  36   long                  ncounts;
  37   struct bb             *next;
  38   const unsigned long   *addresses;
  39 };
  40
  41 extern struct bb *__bb_head;    /* from gmon.c */
  42
  43 #define OUT_NAME        "gmon.out"
  44
  45
  46 void
  47 DEFUN_VOID(__bb_exit_func)
  48 {
  49   const int version = GMON_VERSION;
  50   struct gmon_hdr ghdr;
  51   struct bb *ptr;
  52   FILE *fp;
  53   fp = fopen(OUT_NAME, "wb");
  54   if (!fp)
  55     {
  56       perror(OUT_NAME);
  57       return;
  58     }
  59   bcopy(GMON_MAGIC, &ghdr.cookie[0], 4);
  60   bcopy(&version, &ghdr.version, sizeof(version));
  61   fwrite(&ghdr, sizeof(ghdr), 1, fp);
  62
  63   for (ptr = __bb_head; ptr != 0; ptr = ptr->next) {
  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       fwrite(&ptr->addresses[i], sizeof(ptr->addresses[0]), 1, fp);
  74       fwrite(&ptr->counts[i], sizeof(ptr->counts[0]), 1, fp);
  75     }
  76   }
  77   fclose (fp);
  78 }