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) 2000-2024 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 3 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., 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, 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 {
  35   long zero_word;
  36   const char *filename;
  37   long *counts;
  38   long ncounts;
  39   struct bb *next;
  40   const unsigned long *addresses;
  41 };
  42
  43 struct bb *__bb_head = (struct bb *) 0;
  44
  45
  46 void
  47 __bb_exit_func ()
  48 {
  49   const int version = GMON_VERSION;
  50   struct gmon_hdr ghdr;
  51   struct bb *ptr;
  52   FILE *fp;
  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 be
  57      overwritten.  Thus, a separate file is generated instead.  The
  58      two files can easily be combined by specifying them on gprof's
  59      command line (and possibly generating a gmon.sum file with "gprof
  60      -s"). */
  61 #ifndef GEN_GMON_CNT_FILE
  62 #   define OUT_NAME     "gmon.out"
  63 #else
  64 #   define OUT_NAME     "gmon.cnt"
  65 #endif
  66   fp = fopen (OUT_NAME, "wb");
  67   if (!fp)
  68     {
  69       perror (OUT_NAME);
  70       return;
  71     }
  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     {
  78       u_int ncounts = ptr->ncounts;
  79       u_char tag;
  80       u_int i;
  81
  82       tag = GMON_TAG_BB_COUNT;
  83       fwrite (&tag, sizeof (tag), 1, fp);
  84       fwrite (&ncounts, sizeof (ncounts), 1, fp);
  85
  86       for (i = 0; i < ncounts; ++i)
  87         {
  88           fwrite (&ptr->addresses[i], sizeof (ptr->addresses[0]), 1, fp);
  89           fwrite (&ptr->counts[i], sizeof (ptr->counts[0]), 1, fp);
  90         }
  91     }
  92   fclose (fp);
  93 }