/* Test program for dwarf_peel_type. Peels type of top-level vars.
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Copyright (C) 2017 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <assert.h>
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#include <argp.h>
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#include <inttypes.h>
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#include <fcntl.h>
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#include ELFUTILS_HEADER(dw)
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#include ELFUTILS_HEADER(dwfl)
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#include <stdio.h>
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#include <unistd.h>
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#include <dwarf.h>
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#include "../libdw/known-dwarf.h"
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static const char *
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dwarf_tag_string (unsigned int tag)
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{
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switch (tag)
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{
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#define DWARF_ONE_KNOWN_DW_TAG(NAME, CODE) case CODE: return #NAME;
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DWARF_ALL_KNOWN_DW_TAG
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#undef DWARF_ONE_KNOWN_DW_TAG
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default:
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return NULL;
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}
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}
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void
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print_var_raw_type (Dwarf_Die *var)
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{
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Dwarf_Attribute attr_mem;
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Dwarf_Die type_mem;
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Dwarf_Die *type;
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const char *name = dwarf_diename (var);
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type = dwarf_formref_die (dwarf_attr (var, DW_AT_type, &attr_mem),
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&type_mem);
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if (type != NULL)
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{
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/* Test twice, once with a separate result DIE. Then with the
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DIE itself. The resulting tag should be the same. */
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Dwarf_Die result_mem;
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Dwarf_Die *result = &result_mem;
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int res = dwarf_peel_type (type, result);
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if (res < 0)
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printf ("%s error peeling type: %s\n", name, dwarf_errmsg (-1));
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else if (res > 0)
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printf ("%s missing DW_TAG_TYPE, could peel further: %s\n",
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name, dwarf_tag_string (dwarf_tag (result)));
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else
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{
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int tag = dwarf_tag (result);
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printf ("%s raw type %s\n", name, dwarf_tag_string (tag));
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res = dwarf_peel_type (type, type);
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if (res < 0)
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printf ("%s cannot peel type itself: %s\n", name,
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dwarf_errmsg (-1));
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else if (res > 0)
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printf ("%s missing DW_TAG_TYPE, could peel type further: %s\n",
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name, dwarf_tag_string (dwarf_tag (type)));
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else if (dwarf_tag (type) != tag)
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printf ("%s doesn't resolve the same: %s != %s\n", name,
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dwarf_tag_string (tag),
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dwarf_tag_string (dwarf_tag (type)));
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}
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}
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else
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printf ("%s has no type.\n", name);
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}
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int
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main (int argc, char *argv[])
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{
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int remaining;
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Dwfl *dwfl;
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(void) argp_parse (dwfl_standard_argp (), argc, argv, 0, &remaining,
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&dwfl);
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assert (dwfl != NULL);
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Dwarf_Die *cu = NULL;
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Dwarf_Addr dwbias;
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while ((cu = dwfl_nextcu (dwfl, cu, &dwbias)) != NULL)
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{
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Dwarf_Die die_mem;
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Dwarf_Die *die = &die_mem;
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dwarf_child (cu, &die_mem);
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while (1)
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{
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if (dwarf_tag (die) == DW_TAG_variable)
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print_var_raw_type (die);
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if (dwarf_siblingof (die, &die_mem) != 0)
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break;
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}
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}
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dwfl_end (dwfl);
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}
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