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 dwarf_getsrcfiles (Dwarf_Die *cudie, Dwarf_Files **files, size_t *nfiles) 40 { 41 if (cudie == NULL) 42 return -1; 43 if (! is_cudie (cudie)) 44 { 45 __libdw_seterrno (DWARF_E_NOT_CUDIE); 46 return -1; 47 } 48 49 int res = -1; 50 51 /* Get the information if it is not already known. */ 52 struct Dwarf_CU *const cu = cudie->cu; 53 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 if (cu->unit_type == DW_UT_split_compile 58 || cu->unit_type == DW_UT_split_type) 59 { 60 /* We tried, assume we fail... */ 61 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 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 res = __libdw_getsrclines (cu->dbg, 0, 70 __libdw_getcompdir (cudie), 71 cu->address_size, NULL, 72 &cu->files); 73 } 74 else 75 { 76 Dwarf_CU *skel = __libdw_find_split_unit (cu); 77 if (skel != NULL) 78 { 79 Dwarf_Die skeldie = CUDIE (skel); 80 res = INTUSE(dwarf_getsrcfiles) (&skeldie, files, nfiles); 81 cu->files = skel->files; 82 } 83 } 84 } 85 else 86 { 87 Dwarf_Lines *lines; 88 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 res = INTUSE(dwarf_getsrclines) (cudie, &lines, &nlines); 93 } 94 } 95 else if (cu->files != (void *) -1l) 96 /* We already have the information. */ 97 res = 0; 98 99 if (likely (res == 0)) 100 { 101 assert (cu->files != NULL && cu->files != (void *) -1l); 102 *files = cu->files; 103 if (nfiles != NULL) 104 *nfiles = cu->files->nfiles; 105 } 106 107 // XXX Eventually: unlocking here. 108 109 return res; 110 } 111 INTDEF (dwarf_getsrcfiles) 112
