Line data    Source code

       1             : /* Return source file information of CU.
       2             :    Copyright (C) 2004, 2005, 2013, 2015, 2018 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             : 
       5             :    This file is free software; you can redistribute it and/or modify
       6             :    it under the terms of either
       7             : 
       8             :      * the GNU Lesser General Public License as published by the Free
       9             :        Software Foundation; either version 3 of the License, or (at
      10             :        your option) any later version
      11             : 
      12             :    or
      13             : 
      14             :      * the GNU General Public License as published by the Free
      15             :        Software Foundation; either version 2 of the License, or (at
      16             :        your option) any later version
      17             : 
      18             :    or both in parallel, as here.
      19             : 
      20             :    elfutils is distributed in the hope that it will be useful, but
      21             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      22             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      23             :    General Public License for more details.
      24             : 
      25             :    You should have received copies of the GNU General Public License and
      26             :    the GNU Lesser General Public License along with this program.  If
      27             :    not, see <http://www.gnu.org/licenses/>.  */
      28             : 
      29             : #ifdef HAVE_CONFIG_H
      30             : # include <config.h>
      31             : #endif
      32             : 
      33             : #include <assert.h>
      34             : #include <dwarf.h>
      35             : #include "libdwP.h"
      36             : 
      37             : 
      38             : int
      39      499599 : dwarf_getsrcfiles (Dwarf_Die *cudie, Dwarf_Files **files, size_t *nfiles)
      40             : {
      41      499599 :   if (cudie == NULL)
      42             :     return -1;
      43      499599 :   if (! is_cudie (cudie))
      44             :     {
      45           0 :       __libdw_seterrno (DWARF_E_NOT_CUDIE);
      46           0 :       return -1;
      47             :     }
      48             : 
      49      499599 :   int res = -1;
      50             : 
      51             :   /* Get the information if it is not already known.  */
      52      499599 :   struct Dwarf_CU *const cu = cudie->cu;
      53      499599 :   if (cu->files == NULL)
      54             :     {
      55             :       /* For split units there might be a simple file table (without lines).
      56             :          If not, use the one from the skeleton.  */
      57       13776 :       if (cu->unit_type == DW_UT_split_compile
      58        6888 :           || cu->unit_type == DW_UT_split_type)
      59             :         {
      60             :           /* We tried, assume we fail...  */
      61           6 :           cu->files = (void *) -1;
      62             : 
      63             :           /* See if there is a .debug_line section, for split CUs
      64             :              the table is at offset zero.  */
      65           6 :           if (cu->dbg->sectiondata[IDX_debug_line] != NULL)
      66             :             {
      67             :               /* We are only interested in the files, the lines will
      68             :                  always come from the skeleton.  */
      69           6 :               res = __libdw_getsrclines (cu->dbg, 0,
      70             :                                          __libdw_getcompdir (cudie),
      71           6 :                                          cu->address_size, NULL,
      72             :                                          &cu->files);
      73             :             }
      74             :           else
      75             :             {
      76           0 :               Dwarf_CU *skel = __libdw_find_split_unit (cu);
      77           0 :               if (skel != NULL)
      78             :                 {
      79           0 :                   Dwarf_Die skeldie = CUDIE (skel);
      80           0 :                   res = INTUSE(dwarf_getsrcfiles) (&skeldie, files, nfiles);
      81           0 :                   cu->files = skel->files;
      82             :                 }
      83             :             }
      84             :         }
      85             :       else
      86             :         {
      87        6882 :           Dwarf_Lines *lines;
      88        6882 :           size_t nlines;
      89             : 
      90             :           /* Let the more generic function do the work.  It'll create more
      91             :              data but that will be needed in an real program anyway.  */
      92        6882 :           res = INTUSE(dwarf_getsrclines) (cudie, &lines, &nlines);
      93             :         }
      94             :     }
      95      492711 :   else if (cu->files != (void *) -1l)
      96             :     /* We already have the information.  */
      97      492711 :     res = 0;
      98             : 
      99      499599 :   if (likely (res == 0))
     100             :     {
     101      499599 :       assert (cu->files != NULL && cu->files != (void *) -1l);
     102      499599 :       *files = cu->files;
     103      499599 :       if (nfiles != NULL)
     104      499494 :         *nfiles = cu->files->nfiles;
     105             :     }
     106             : 
     107             :   // XXX Eventually: unlocking here.
     108             : 
     109             :   return res;
     110             : }
     111             : INTDEF (dwarf_getsrcfiles)