LCOV - code coverage report
Current view: top level - gcc - file-prefix-map.cc (source / functions) Coverage Total Hit
Test: gcc.info Lines: 79.4 % 68 54
Test Date: 2024-12-21 13:15:12 Functions: 88.9 % 9 8
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: - 0 0

             Branch data     Line data    Source code
       1                 :             : /* Implementation of file prefix remapping support (-f*-prefix-map options).
       2                 :             :    Copyright (C) 2017-2024 Free Software Foundation, Inc.
       3                 :             : 
       4                 :             :    This program is free software; you can redistribute it and/or modify it
       5                 :             :    under the terms of the GNU General Public License as published by the
       6                 :             :    Free Software Foundation; either version 3, or (at your option) any
       7                 :             :    later version.
       8                 :             : 
       9                 :             :    This program is distributed in the hope that it will be useful,
      10                 :             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      11                 :             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12                 :             :    GNU General Public License for more details.
      13                 :             : 
      14                 :             :    You should have received a copy of the GNU General Public License
      15                 :             :    along with this program; see the file COPYING3.  If not see
      16                 :             :    <http://www.gnu.org/licenses/>.  */
      17                 :             : 
      18                 :             : #include "config.h"
      19                 :             : #include "system.h"
      20                 :             : #include "coretypes.h"
      21                 :             : #include "diagnostic.h"
      22                 :             : #include "file-prefix-map.h"
      23                 :             : 
      24                 :             : /* Structure recording the mapping from source file and directory names at
      25                 :             :    compile time to those to be embedded in the compilation result (debug
      26                 :             :    information, the __FILE__ macro expansion, etc).  */
      27                 :             : struct file_prefix_map
      28                 :             : {
      29                 :             :   const char *old_prefix;
      30                 :             :   const char *new_prefix;
      31                 :             :   size_t old_len;
      32                 :             :   size_t new_len;
      33                 :             :   bool canonicalize;
      34                 :             :   struct file_prefix_map *next;
      35                 :             : };
      36                 :             : 
      37                 :             : /* Record a file prefix mapping in the specified map.  ARG is the argument to
      38                 :             :    -f*-prefix-map and must be of the form OLD=NEW.  OPT is the option name
      39                 :             :    for diagnostics.  */
      40                 :             : static void
      41                 :        1220 : add_prefix_map (file_prefix_map *&maps, const char *arg, const char *opt)
      42                 :             : {
      43                 :        1220 :   file_prefix_map *map;
      44                 :        1220 :   const char *p;
      45                 :             : 
      46                 :             :   /* Note: looking for the last '='. The thinking is we can control the paths
      47                 :             :      inside our projects but not where the users build them.  */
      48                 :        1220 :   p = strrchr (arg, '=');
      49                 :        1220 :   if (!p)
      50                 :             :     {
      51                 :           0 :       error ("invalid argument %qs to %qs", arg, opt);
      52                 :           0 :       return;
      53                 :             :     }
      54                 :        1220 :   map = XNEW (file_prefix_map);
      55                 :        1220 :   map->canonicalize = flag_canon_prefix_map;
      56                 :        1220 :   map->old_prefix = xstrndup (arg, p - arg);
      57                 :        1220 :   map->old_len = p - arg;
      58                 :        1220 :   if (map->canonicalize)
      59                 :             :     {
      60                 :           0 :       char *realname = lrealpath (map->old_prefix);
      61                 :           0 :       free (const_cast <char *> (map->old_prefix));
      62                 :           0 :       map->old_prefix = realname;
      63                 :           0 :       map->old_len = strlen (realname);
      64                 :             :     }
      65                 :        1220 :   p++;
      66                 :        1220 :   map->new_prefix = xstrdup (p);
      67                 :        1220 :   map->new_len = strlen (p);
      68                 :        1220 :   map->next = maps;
      69                 :        1220 :   maps = map;
      70                 :             : }
      71                 :             : 
      72                 :             : /* Perform user-specified mapping of filename prefixes.  Return the
      73                 :             :    GC-allocated new name corresponding to FILENAME or FILENAME if no
      74                 :             :    remapping was performed.  */
      75                 :             : 
      76                 :             : static const char *
      77                 :     3708162 : remap_filename (file_prefix_map *maps, const char *filename)
      78                 :             : {
      79                 :     3708162 :   file_prefix_map *map;
      80                 :     3708162 :   char *s;
      81                 :     3708162 :   const char *name;
      82                 :     3708162 :   const char *realname = NULL;
      83                 :     3708162 :   size_t name_len;
      84                 :             : 
      85                 :     3708162 :   if (!filename)
      86                 :             :     return filename;
      87                 :             : 
      88                 :     3716302 :   for (map = maps; map; map = map->next)
      89                 :        8697 :     if (map->canonicalize)
      90                 :             :       {
      91                 :           0 :         if (realname == NULL)
      92                 :             :           {
      93                 :           0 :             if (lbasename (filename) == filename)
      94                 :             :               realname = filename;
      95                 :             :             else
      96                 :           0 :               realname = lrealpath (filename);
      97                 :             :           }
      98                 :           0 :         if (filename_ncmp (realname, map->old_prefix, map->old_len) == 0)
      99                 :             :           break;
     100                 :             :       }
     101                 :        8697 :     else if (filename_ncmp (filename, map->old_prefix, map->old_len) == 0)
     102                 :             :       break;
     103                 :     3708162 :   if (!map)
     104                 :             :     {
     105                 :     3707605 :       if (realname != filename)
     106                 :     3707605 :         free (const_cast <char *> (realname));
     107                 :     3707605 :       return filename;
     108                 :             :     }
     109                 :         557 :   if (map->canonicalize)
     110                 :           0 :     name = realname + map->old_len;
     111                 :             :   else
     112                 :         557 :     name = filename + map->old_len;
     113                 :         557 :   name_len = strlen (name) + 1;
     114                 :             : 
     115                 :         557 :   s = (char *) ggc_alloc_atomic (name_len + map->new_len);
     116                 :         557 :   memcpy (s, map->new_prefix, map->new_len);
     117                 :         557 :   memcpy (s + map->new_len, name, name_len);
     118                 :         557 :   if (realname != filename)
     119                 :         557 :     free (const_cast <char *> (realname));
     120                 :             :   return s;
     121                 :             : }
     122                 :             : 
     123                 :             : /* NOTE: if adding another -f*-prefix-map option then don't forget to
     124                 :             :    ignore it in DW_AT_producer (gen_command_line_string in opts.cc).  */
     125                 :             : 
     126                 :             : /* Linked lists of file_prefix_map structures.  */
     127                 :             : static file_prefix_map *macro_prefix_maps; /* -fmacro-prefix-map  */
     128                 :             : static file_prefix_map *debug_prefix_maps; /* -fdebug-prefix-map  */
     129                 :             : static file_prefix_map *profile_prefix_maps; /* -fprofile-prefix-map  */
     130                 :             : 
     131                 :             : /* Record a file prefix mapping for -fmacro-prefix-map.  */
     132                 :             : void
     133                 :           8 : add_macro_prefix_map (const char *arg)
     134                 :             : {
     135                 :           8 :   add_prefix_map (macro_prefix_maps, arg, "-fmacro-prefix-map");
     136                 :           8 : }
     137                 :             : 
     138                 :             : /* Record a file prefix mapping for -fdebug-prefix-map.  */
     139                 :             : void
     140                 :         552 : add_debug_prefix_map (const char *arg)
     141                 :             : {
     142                 :         552 :   add_prefix_map (debug_prefix_maps, arg, "-fdebug-prefix-map");
     143                 :         552 : }
     144                 :             : 
     145                 :             : /* Record a file prefix mapping for all -f*-prefix-map.  */
     146                 :             : void
     147                 :         220 : add_file_prefix_map (const char *arg)
     148                 :             : {
     149                 :         220 :   add_prefix_map (macro_prefix_maps, arg, "-ffile-prefix-map");
     150                 :         220 :   add_prefix_map (debug_prefix_maps, arg, "-ffile-prefix-map");
     151                 :         220 :   add_prefix_map (profile_prefix_maps, arg, "-ffile-prefix-map");
     152                 :         220 : }
     153                 :             : 
     154                 :             : /* Record a file prefix mapping for -fprofile-prefix-map.  */
     155                 :             : void
     156                 :           0 : add_profile_prefix_map (const char *arg)
     157                 :             : {
     158                 :           0 :   add_prefix_map (profile_prefix_maps, arg, "-fprofile-prefix-map");
     159                 :           0 : }
     160                 :             : 
     161                 :             : /* Remap using -fmacro-prefix-map.  Return the GC-allocated new name
     162                 :             :    corresponding to FILENAME or FILENAME if no remapping was performed.  */
     163                 :             : const char *
     164                 :      223172 : remap_macro_filename (const char *filename)
     165                 :             : {
     166                 :      223172 :   return remap_filename (macro_prefix_maps, filename);
     167                 :             : }
     168                 :             : 
     169                 :             : /* Remap using -fdebug-prefix-map.  Return the GC-allocated new name
     170                 :             :    corresponding to FILENAME or FILENAME if no remapping was performed.  */
     171                 :             : const char *
     172                 :     3476442 : remap_debug_filename (const char *filename)
     173                 :             : {
     174                 :     3476442 :   return remap_filename (debug_prefix_maps, filename);
     175                 :             : }
     176                 :             : 
     177                 :             : /* Remap using -fprofile-prefix-map.  Return the GC-allocated new name
     178                 :             :    corresponding to FILENAME or FILENAME if no remapping was performed.  */
     179                 :             : const char *
     180                 :        8548 : remap_profile_filename (const char *filename)
     181                 :             : {
     182                 :        8548 :   return remap_filename (profile_prefix_maps, filename);
     183                 :             : }
        

Generated by: LCOV version 2.1-beta

LCOV profile is generated on x86_64 machine using following configure options: configure --disable-bootstrap --enable-coverage=opt --enable-languages=c,c++,fortran,go,jit,lto,rust,m2 --enable-host-shared. GCC test suite is run with the built compiler.