125b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Find matching source locations in a module. 225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Copyright (C) 2005 Red Hat, Inc. 325b3c049e70834cf33790a28643ab058b507b35cBen Cheng This file is part of Red Hat elfutils. 425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 525b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is free software; you can redistribute it and/or modify 625b3c049e70834cf33790a28643ab058b507b35cBen Cheng it under the terms of the GNU General Public License as published by the 725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Free Software Foundation; version 2 of the License. 825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 925b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is distributed in the hope that it will be useful, but 1025b3c049e70834cf33790a28643ab058b507b35cBen Cheng WITHOUT ANY WARRANTY; without even the implied warranty of 1125b3c049e70834cf33790a28643ab058b507b35cBen Cheng MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 1225b3c049e70834cf33790a28643ab058b507b35cBen Cheng General Public License for more details. 1325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 1425b3c049e70834cf33790a28643ab058b507b35cBen Cheng You should have received a copy of the GNU General Public License along 1525b3c049e70834cf33790a28643ab058b507b35cBen Cheng with Red Hat elfutils; if not, write to the Free Software Foundation, 1625b3c049e70834cf33790a28643ab058b507b35cBen Cheng Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 1725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 1825b3c049e70834cf33790a28643ab058b507b35cBen Cheng In addition, as a special exception, Red Hat, Inc. gives You the 1925b3c049e70834cf33790a28643ab058b507b35cBen Cheng additional right to link the code of Red Hat elfutils with code licensed 2025b3c049e70834cf33790a28643ab058b507b35cBen Cheng under any Open Source Initiative certified open source license 2125b3c049e70834cf33790a28643ab058b507b35cBen Cheng (http://www.opensource.org/licenses/index.php) which requires the 2225b3c049e70834cf33790a28643ab058b507b35cBen Cheng distribution of source code with any binary distribution and to 2325b3c049e70834cf33790a28643ab058b507b35cBen Cheng distribute linked combinations of the two. Non-GPL Code permitted under 2425b3c049e70834cf33790a28643ab058b507b35cBen Cheng this exception must only link to the code of Red Hat elfutils through 2525b3c049e70834cf33790a28643ab058b507b35cBen Cheng those well defined interfaces identified in the file named EXCEPTION 2625b3c049e70834cf33790a28643ab058b507b35cBen Cheng found in the source code files (the "Approved Interfaces"). The files 2725b3c049e70834cf33790a28643ab058b507b35cBen Cheng of Non-GPL Code may instantiate templates or use macros or inline 2825b3c049e70834cf33790a28643ab058b507b35cBen Cheng functions from the Approved Interfaces without causing the resulting 2925b3c049e70834cf33790a28643ab058b507b35cBen Cheng work to be covered by the GNU General Public License. Only Red Hat, 3025b3c049e70834cf33790a28643ab058b507b35cBen Cheng Inc. may make changes or additions to the list of Approved Interfaces. 3125b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat's grant of this exception is conditioned upon your not adding 3225b3c049e70834cf33790a28643ab058b507b35cBen Cheng any new exceptions. If you wish to add a new Approved Interface or 3325b3c049e70834cf33790a28643ab058b507b35cBen Cheng exception, please contact Red Hat. You must obey the GNU General Public 3425b3c049e70834cf33790a28643ab058b507b35cBen Cheng License in all respects for all of the Red Hat elfutils code and other 3525b3c049e70834cf33790a28643ab058b507b35cBen Cheng code used in conjunction with Red Hat elfutils except the Non-GPL Code 3625b3c049e70834cf33790a28643ab058b507b35cBen Cheng covered by this exception. If you modify this file, you may extend this 3725b3c049e70834cf33790a28643ab058b507b35cBen Cheng exception to your version of the file, but you are not obligated to do 3825b3c049e70834cf33790a28643ab058b507b35cBen Cheng so. If you do not wish to provide this exception without modification, 3925b3c049e70834cf33790a28643ab058b507b35cBen Cheng you must delete this exception statement from your version and license 4025b3c049e70834cf33790a28643ab058b507b35cBen Cheng this file solely under the GPL without exception. 4125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 4225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is an included package of the Open Invention Network. 4325b3c049e70834cf33790a28643ab058b507b35cBen Cheng An included package of the Open Invention Network is a package for which 4425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Open Invention Network licensees cross-license their patents. No patent 4525b3c049e70834cf33790a28643ab058b507b35cBen Cheng license is granted, either expressly or impliedly, by designation as an 4625b3c049e70834cf33790a28643ab058b507b35cBen Cheng included package. Should you wish to participate in the Open Invention 4725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Network licensing program, please visit www.openinventionnetwork.com 4825b3c049e70834cf33790a28643ab058b507b35cBen Cheng <http://www.openinventionnetwork.com>. */ 4925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5025b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include "libdwflP.h" 5125b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include "../libdw/libdwP.h" 5225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5425b3c049e70834cf33790a28643ab058b507b35cBen Chengint 5525b3c049e70834cf33790a28643ab058b507b35cBen Chengdwfl_module_getsrc_file (Dwfl_Module *mod, 5625b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *fname, int lineno, int column, 5725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwfl_Line ***srcsp, size_t *nsrcs) 5825b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 5925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (mod == NULL) 6025b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 6125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 6225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (mod->dw == NULL) 6325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 6425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Addr bias; 6525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (INTUSE(dwfl_module_getdwarf) (mod, &bias) == NULL) 6625b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 6725b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 6825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 6925b3c049e70834cf33790a28643ab058b507b35cBen Cheng bool is_basename = strchr (fname, '/') == NULL; 7025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 7125b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t max_match = *nsrcs ?: ~0u; 7225b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t act_match = *nsrcs; 7325b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t cur_match = 0; 7425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwfl_Line **match = *nsrcs == 0 ? NULL : *srcsp; 7525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 7625b3c049e70834cf33790a28643ab058b507b35cBen Cheng struct dwfl_cu *cu = NULL; 7725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwfl_Error error; 7825b3c049e70834cf33790a28643ab058b507b35cBen Cheng while ((error = __libdwfl_nextcu (mod, cu, &cu)) == DWFL_E_NOERROR 7925b3c049e70834cf33790a28643ab058b507b35cBen Cheng && cu != NULL 8025b3c049e70834cf33790a28643ab058b507b35cBen Cheng && (error = __libdwfl_cu_getsrclines (cu)) == DWFL_E_NOERROR) 8125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 8225b3c049e70834cf33790a28643ab058b507b35cBen Cheng inline const char *INTUSE(dwarf_line_file) (const Dwarf_Line *line) 8325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 8425b3c049e70834cf33790a28643ab058b507b35cBen Cheng return line->files->info[line->file].name; 8525b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 8625b3c049e70834cf33790a28643ab058b507b35cBen Cheng inline Dwarf_Line *dwfl_line (const Dwfl_Line *line) 8725b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 8825b3c049e70834cf33790a28643ab058b507b35cBen Cheng return &dwfl_linecu (line)->die.cu->lines->info[line->idx]; 8925b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 9025b3c049e70834cf33790a28643ab058b507b35cBen Cheng inline const char *dwfl_line_file (const Dwfl_Line *line) 9125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 9225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return INTUSE(dwarf_line_file) (dwfl_line (line)); 9325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 9425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 9525b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Search through all the line number records for a matching 9625b3c049e70834cf33790a28643ab058b507b35cBen Cheng file and line/column number. If any of the numbers is zero, 9725b3c049e70834cf33790a28643ab058b507b35cBen Cheng no match is performed. */ 9825b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *lastfile = NULL; 9925b3c049e70834cf33790a28643ab058b507b35cBen Cheng bool lastmatch = false; 10025b3c049e70834cf33790a28643ab058b507b35cBen Cheng for (size_t cnt = 0; cnt < cu->die.cu->lines->nlines; ++cnt) 10125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 10225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Line *line = &cu->die.cu->lines->info[cnt]; 10325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 10425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (unlikely (line->file >= line->files->nfiles)) 10525b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 10625b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libdwfl_seterrno (DWFL_E (LIBDW, DWARF_E_INVALID_DWARF)); 10725b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 10825b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 10925b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 11025b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 11125b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *file = INTUSE(dwarf_line_file) (line); 11225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (file != lastfile) 11325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 11425b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Match the name with the name the user provided. */ 11525b3c049e70834cf33790a28643ab058b507b35cBen Cheng lastfile = file; 11625b3c049e70834cf33790a28643ab058b507b35cBen Cheng lastmatch = !strcmp (is_basename ? basename (file) : file, 11725b3c049e70834cf33790a28643ab058b507b35cBen Cheng fname); 11825b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 11925b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 12025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (!lastmatch) 12125b3c049e70834cf33790a28643ab058b507b35cBen Cheng continue; 12225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 12325b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* See whether line and possibly column match. */ 12425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (lineno != 0 12525b3c049e70834cf33790a28643ab058b507b35cBen Cheng && (lineno > line->line 12625b3c049e70834cf33790a28643ab058b507b35cBen Cheng || (column != 0 && column > line->column))) 12725b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Cannot match. */ 12825b3c049e70834cf33790a28643ab058b507b35cBen Cheng continue; 12925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 13025b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Determine whether this is the best match so far. */ 13125b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t inner; 13225b3c049e70834cf33790a28643ab058b507b35cBen Cheng for (inner = 0; inner < cur_match; ++inner) 13325b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (dwfl_line_file (match[inner]) 13425b3c049e70834cf33790a28643ab058b507b35cBen Cheng == INTUSE(dwarf_line_file) (line)) 13525b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 13625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (inner < cur_match 13725b3c049e70834cf33790a28643ab058b507b35cBen Cheng && (dwfl_line (match[inner])->line != line->line 13825b3c049e70834cf33790a28643ab058b507b35cBen Cheng || dwfl_line (match[inner])->line != lineno 13925b3c049e70834cf33790a28643ab058b507b35cBen Cheng || (column != 0 14025b3c049e70834cf33790a28643ab058b507b35cBen Cheng && (dwfl_line (match[inner])->column != line->column 14125b3c049e70834cf33790a28643ab058b507b35cBen Cheng || dwfl_line (match[inner])->column != column)))) 14225b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 14325b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* We know about this file already. If this is a better 14425b3c049e70834cf33790a28643ab058b507b35cBen Cheng match for the line number, use it. */ 14525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (dwfl_line (match[inner])->line >= line->line 14625b3c049e70834cf33790a28643ab058b507b35cBen Cheng && (dwfl_line (match[inner])->line != line->line 14725b3c049e70834cf33790a28643ab058b507b35cBen Cheng || dwfl_line (match[inner])->column >= line->column)) 14825b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Use the new line. Otherwise the old one. */ 14925b3c049e70834cf33790a28643ab058b507b35cBen Cheng match[inner] = &cu->lines->idx[cnt]; 15025b3c049e70834cf33790a28643ab058b507b35cBen Cheng continue; 15125b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 15225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 15325b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (cur_match < max_match) 15425b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 15525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (cur_match == act_match) 15625b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 15725b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Enlarge the array for the results. */ 15825b3c049e70834cf33790a28643ab058b507b35cBen Cheng act_match += 10; 15925b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwfl_Line **newp = realloc (match, 16025b3c049e70834cf33790a28643ab058b507b35cBen Cheng act_match 16125b3c049e70834cf33790a28643ab058b507b35cBen Cheng * sizeof (Dwfl_Line *)); 16225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (newp == NULL) 16325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 16425b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (match); 16525b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libdwfl_seterrno (DWFL_E_NOMEM); 16625b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 16725b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 16825b3c049e70834cf33790a28643ab058b507b35cBen Cheng match = newp; 16925b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 17025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 17125b3c049e70834cf33790a28643ab058b507b35cBen Cheng match[cur_match++] = &cu->lines->idx[cnt]; 17225b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 17325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 17425b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 17525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 17625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (cur_match > 0) 17725b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 17825b3c049e70834cf33790a28643ab058b507b35cBen Cheng assert (*nsrcs == 0 || *srcsp == match); 17925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 18025b3c049e70834cf33790a28643ab058b507b35cBen Cheng *nsrcs = cur_match; 18125b3c049e70834cf33790a28643ab058b507b35cBen Cheng *srcsp = match; 18225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 18325b3c049e70834cf33790a28643ab058b507b35cBen Cheng return 0; 18425b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 18525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 18625b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libdwfl_seterrno (DWFL_E_NO_MATCH); 18725b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 18825b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 189