gprof/bb_exit_func.c

   1 /*  bb_exit_func.c - dumps all the basic-block statistics linked into
   2     the bb_head chain to .d files.
   3
   4    Copyright (C) 2000  Free Software Foundation, Inc.
   5
   6    This file is part of GNU Binutils.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  21    02111-1307, USA.
  22
  23    This code was contributed by:
  24
  25      David Mosberger-Tang <David.Mosberger@acm.org>  */
  26 \f
  27 #include <stdio.h>
  28 #include <strings.h>
  29 #include "bfd.h"
  30 #include "gmon_out.h"
  31
  32 /* structure emitted by -a */
  33 struct bb {
  34     long                zero_word;
  35     const char          *filename;
  36     long                *counts;
  37     long                ncounts;
  38     struct bb           *next;
  39     const unsigned long *addresses;
  40 };
  41
  42 struct bb *__bb_head = (struct bb *)0;
  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     /*
  53      * GEN_GMON_CNT_FILE should be defined on systems with mcleanup()
  54      * functions that do not write basic-block to gmon.out.  In such
  55      * cases profiling with "-pg -a" would result in a gmon.out file
  56      * without basic-block info (because the file written here would
  57      * be overwritten.  Thus, a separate file is generated instead.
  58      * The two files can easily be combined by specifying them
  59      * on gprof's command line (and possibly generating a gmon.sum
  60      * file with "gprof -s").
  61      */
  62 #ifndef GEN_GMON_CNT_FILE
  63 #   define OUT_NAME     "gmon.out"
  64 #else
  65 #   define OUT_NAME     "gmon.cnt"
  66 #endif
  67     fp = fopen(OUT_NAME, "wb");
  68     if (!fp) {
  69         perror(OUT_NAME);
  70         return;
  71     } /* if */
  72     memcpy(&ghdr.cookie[0], GMON_MAGIC, 4);
  73     memcpy(&ghdr.version, &version, sizeof(version));
  74     fwrite(&ghdr, sizeof(ghdr), 1, fp);
  75
  76     for (ptr = __bb_head; ptr != 0; ptr = ptr->next) {
  77         u_int ncounts = ptr->ncounts;
  78         u_char tag;
  79         u_int i;
  80
  81         tag = GMON_TAG_BB_COUNT;
  82         fwrite(&tag, sizeof(tag), 1, fp);
  83         fwrite(&ncounts, sizeof(ncounts), 1, fp);
  84
  85         for (i = 0; i < ncounts; ++i) {
  86             fwrite(&ptr->addresses[i], sizeof(ptr->addresses[0]), 1, fp);
  87             fwrite(&ptr->counts[i], sizeof(ptr->counts[0]), 1, fp);
  88         } /* for */
  89     } /* for */
  90     fclose (fp);
  91 } /* __bb_exit_func */
  92
  93                         /*** end of __bb_exit_func.c ***/