/* A variant of get-lines that uses dwarf_next_lines.

   Copyright (C) 2002, 2004, 2018 Red Hat, Inc.

   This file is part of elfutils.

   This file is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   elfutils is distributed in the hope that it will be useful, but

   WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H

# include <config.h>

#endif

#include <fcntl.h>

#include <inttypes.h>

#include <libelf.h>

#include ELFUTILS_HEADER(dw)

#include <stdio.h>

#include <string.h>

#include <unistd.h>

int

main (int argc, char *argv[])

{

  int result = 0;

  int cnt;

  for (cnt = 1; cnt < argc; ++cnt)

    {

      int fd = open (argv[cnt], O_RDONLY);

      Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ);

      if  (dbg == NULL)

	{

	  printf ("%s not usable: %s\n", argv[cnt], dwarf_errmsg (-1));

	  close  (fd);

	  continue;

	}

      Dwarf_Off off;

      Dwarf_Off next_off = 0;

      Dwarf_CU *cu = NULL;

      Dwarf_Lines *lb;

      size_t nlb;

      int res;

      while ((res = dwarf_next_lines (dbg, off = next_off, &next_off, &cu,

				      NULL, NULL, &lb, &nlb)) == 0)

	{

	  printf ("off = %" PRIu64 "\n", off);

	  printf (" %zu lines\n", nlb);

	  for (size_t i = 0; i < nlb; ++i)

	    {

	      Dwarf_Line *l = dwarf_onesrcline (lb, i);

	      if (l == NULL)

		{

		  printf ("%s: cannot get individual line\n", argv[cnt]);

		  result = 1;

		  break;

		}

	      Dwarf_Addr addr;

	      if (dwarf_lineaddr (l, &addr) != 0)

		addr = 0;

	      const char *file = dwarf_linesrc (l, NULL, NULL);

	      int line;

	      if (dwarf_lineno (l, &line) != 0)

		line = 0;

	      printf ("%" PRIx64 ": %s:%d:", (uint64_t) addr,

		      file ?: "???", line);

	      /* Getting the file path through the Dwarf_Files should

		 result in the same path.  */

	      Dwarf_Files *files;

	      size_t idx;

	      if (dwarf_line_file (l, &files, &idx) != 0)

		{

		  printf ("%s: cannot get file from line (%zd): %s\n",

			  argv[cnt], i, dwarf_errmsg (-1));

		  result = 1;

		  break;

		}

	      const char *path = dwarf_filesrc (files, idx, NULL, NULL);

	      if ((path == NULL && file != NULL)

		  || (path != NULL && file == NULL)

		  || (strcmp (file, path) != 0))

		{

		  printf ("%s: line %zd srcline (%s) != file srcline (%s)\n",

			  argv[cnt], i, file ?: "???", path ?: "???");

		  result = 1;

		  break;

		}

	      int column;

	      if (dwarf_linecol (l, &column) != 0)

		column = 0;

	      if (column >= 0)

		printf ("%d:", column);

	      bool is_stmt;

	      if (dwarf_linebeginstatement (l, &is_stmt) != 0)

		is_stmt = false;

	      bool end_sequence;

	      if (dwarf_lineendsequence (l, &end_sequence) != 0)

		end_sequence = false;

	      bool basic_block;

	      if (dwarf_lineblock (l, &basic_block) != 0)

		basic_block = false;

	      bool prologue_end;

	      if (dwarf_lineprologueend (l, &prologue_end) != 0)

		prologue_end = false;

	      bool epilogue_begin;

	      if (dwarf_lineepiloguebegin (l, &epilogue_begin) != 0)

		epilogue_begin = false;

	      printf (" is_stmt:%s, end_seq:%s, bb:%s, prologue:%s, epilogue:%s\n",

		      is_stmt ? "yes" : "no", end_sequence ? "yes" : "no",

		      basic_block ? "yes" : "no", prologue_end  ? "yes" : "no",

		      epilogue_begin ? "yes" : "no");

	    }

	}

      if (res < 0)

	{

	  printf ("dwarf_next_lines failed: %s\n", dwarf_errmsg (-1));

	  result = 1;

	}

      dwarf_end (dbg);

      close (fd);

    }

  return result;

}