gprof/source.c

   1 /* source.c - Keep track of source files.
   2
   3    Copyright (C) 2000-2021 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Binutils.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21 \f
  22 #include "gprof.h"
  23 #include "libiberty.h"
  24 #include "filenames.h"
  25 #include "search_list.h"
  26 #include "source.h"
  27
  28 #define EXT_ANNO "-ann"         /* Postfix of annotated files.  */
  29
  30 /* Default option values.  */
  31 bool create_annotation_files = false;
  32
  33 Search_List src_search_list = {0, 0};
  34 Source_File *first_src_file = 0;
  35
  36
  37 Source_File *
  38 source_file_lookup_path (const char *path)
  39 {
  40   Source_File *sf;
  41
  42   for (sf = first_src_file; sf; sf = sf->next)
  43     {
  44       if (FILENAME_CMP (path, sf->name) == 0)
  45         break;
  46     }
  47
  48   if (!sf)
  49     {
  50       /* Create a new source file descriptor.  */
  51       sf = (Source_File *) xmalloc (sizeof (*sf));
  52
  53       memset (sf, 0, sizeof (*sf));
  54
  55       sf->name = xstrdup (path);
  56       sf->next = first_src_file;
  57       first_src_file = sf;
  58     }
  59
  60   return sf;
  61 }
  62
  63
  64 Source_File *
  65 source_file_lookup_name (const char *filename)
  66 {
  67   const char *fname;
  68   Source_File *sf;
  69
  70   /* The user cannot know exactly how a filename will be stored in
  71      the debugging info (e.g., ../include/foo.h
  72      vs. /usr/include/foo.h).  So we simply compare the filename
  73      component of a path only.  */
  74   for (sf = first_src_file; sf; sf = sf->next)
  75     {
  76       fname = strrchr (sf->name, '/');
  77
  78       if (fname)
  79         ++fname;
  80       else
  81         fname = sf->name;
  82
  83       if (FILENAME_CMP (filename, fname) == 0)
  84         break;
  85     }
  86
  87   return sf;
  88 }
  89
  90
  91 FILE *
  92 annotate_source (Source_File *sf, unsigned int max_width,
  93      void (*annote) (char *, unsigned int, int, void *),
  94      void *arg)
  95 {
  96   static bool first_file = true;
  97   int i, line_num, nread;
  98   bool new_line;
  99   char buf[8192];
 100   char *fname;
 101   char *annotation, *name_only;
 102   FILE *ifp, *ofp;
 103   Search_List_Elem *sle = src_search_list.head;
 104
 105   /* Open input file.  If open fails, walk along search-list until
 106      open succeeds or reaching end of list.  */
 107   fname = (char *) sf->name;
 108
 109   if (IS_ABSOLUTE_PATH (sf->name))
 110     sle = 0;                    /* Don't use search list for absolute paths.  */
 111
 112   name_only = 0;
 113   while (true)
 114     {
 115       DBG (SRCDEBUG, printf ("[annotate_source]: looking for %s, trying %s\n",
 116                              sf->name, fname));
 117
 118       ifp = fopen (fname, FOPEN_RB);
 119       if (fname != sf->name)
 120         free (fname);
 121       if (ifp)
 122         break;
 123
 124       if (!sle && !name_only)
 125         {
 126           name_only = strrchr (sf->name, '/');
 127 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
 128           {
 129             char *bslash = strrchr (sf->name, '\\');
 130             if (name_only == NULL || (bslash != NULL && bslash > name_only))
 131               name_only = bslash;
 132             if (name_only == NULL && sf->name[0] != '\0' && sf->name[1] == ':')
 133               name_only = (char *)sf->name + 1;
 134           }
 135 #endif
 136           if (name_only)
 137             {
 138               /* Try search-list again, but this time with name only.  */
 139               ++name_only;
 140               sle = src_search_list.head;
 141             }
 142         }
 143
 144       if (sle)
 145         {
 146           fname = xmalloc (strlen (sle->path) + 3
 147                            + strlen (name_only ? name_only : sf->name));
 148           strcpy (fname, sle->path);
 149 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
 150           /* d:foo is not the same thing as d:/foo!  */
 151           if (fname[strlen (fname) - 1] == ':')
 152             strcat (fname, ".");
 153 #endif
 154           strcat (fname, "/");
 155
 156           if (name_only)
 157             strcat (fname, name_only);
 158           else
 159             strcat (fname, sf->name);
 160
 161           sle = sle->next;
 162         }
 163       else
 164         {
 165           if (errno == ENOENT)
 166             fprintf (stderr, _("%s: could not locate `%s'\n"),
 167                      whoami, sf->name);
 168           else
 169             perror (sf->name);
 170
 171           return 0;
 172         }
 173     }
 174
 175   ofp = stdout;
 176
 177   if (create_annotation_files)
 178     {
 179       /* Try to create annotated source file.  */
 180       const char *filename;
 181
 182       /* Create annotation files in the current working directory.  */
 183       filename = strrchr (sf->name, '/');
 184 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
 185         {
 186           char *bslash = strrchr (sf->name, '\\');
 187           if (filename == NULL || (bslash != NULL && bslash > filename))
 188             filename = bslash;
 189           if (filename == NULL && sf->name[0] != '\0' && sf->name[1] == ':')
 190             filename = sf->name + 1;
 191         }
 192 #endif
 193       if (filename)
 194         ++filename;
 195       else
 196         filename = sf->name;
 197
 198       fname = xmalloc (strlen (filename) + strlen (EXT_ANNO) + 1);
 199       strcpy (fname, filename);
 200       strcat (fname, EXT_ANNO);
 201 #ifdef __MSDOS__
 202       {
 203         /* foo.cpp-ann can overwrite foo.cpp due to silent truncation of
 204            file names on 8+3 filesystems.  Their `stat' better be good...  */
 205         struct stat buf1, buf2;
 206
 207         if (stat (filename, &buf1) == 0
 208             && stat (fname, &buf2) == 0
 209             && buf1.st_ino == buf2.st_ino)
 210           {
 211             char *dot = strrchr (fname, '.');
 212
 213             if (!dot)
 214               dot = fname + strlen (filename);
 215             strcpy (dot, ".ann");
 216           }
 217       }
 218 #endif
 219       ofp = fopen (fname, "w");
 220
 221       if (!ofp)
 222         {
 223           perror (fname);
 224           free (fname);
 225           return 0;
 226         }
 227       free (fname);
 228     }
 229
 230   /* Print file names if output goes to stdout
 231      and there are more than one source file.  */
 232   if (ofp == stdout)
 233     {
 234       if (first_file)
 235         first_file = false;
 236       else
 237         fputc ('\n', ofp);
 238
 239       if (first_output)
 240         first_output = false;
 241       else
 242         fprintf (ofp, "\f\n");
 243
 244       fprintf (ofp, _("*** File %s:\n"), sf->name);
 245     }
 246
 247   annotation = (char *) xmalloc (max_width + 1);
 248   line_num = 1;
 249   new_line = true;
 250
 251   while ((nread = fread (buf, 1, sizeof (buf), ifp)) > 0)
 252     {
 253       for (i = 0; i < nread; ++i)
 254         {
 255           if (new_line)
 256             {
 257               (*annote) (annotation, max_width, line_num, arg);
 258               fputs (annotation, ofp);
 259               ++line_num;
 260             }
 261
 262           new_line = (buf[i] == '\n');
 263           fputc (buf[i], ofp);
 264         }
 265     }
 266
 267   free (annotation);
 268   fclose (ifp);
 269   return ofp;
 270 }