blob: bccce32eb15de40e167b5237dc67bb45228e6bff [file] [log] [blame]
/* Test program for dwarf_peel_type. Peels type of top-level vars.
Copyright (C) 2017 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 <assert.h>
#include <argp.h>
#include <inttypes.h>
#include <fcntl.h>
#include ELFUTILS_HEADER(dw)
#include ELFUTILS_HEADER(dwfl)
#include <stdio.h>
#include <unistd.h>
#include <dwarf.h>
#include "../libdw/known-dwarf.h"
static const char *
dwarf_tag_string (unsigned int tag)
{
switch (tag)
{
#define DWARF_ONE_KNOWN_DW_TAG(NAME, CODE) case CODE: return #NAME;
DWARF_ALL_KNOWN_DW_TAG
#undef DWARF_ONE_KNOWN_DW_TAG
default:
return NULL;
}
}
void
print_var_raw_type (Dwarf_Die *var)
{
Dwarf_Attribute attr_mem;
Dwarf_Die type_mem;
Dwarf_Die *type;
const char *name = dwarf_diename (var);
type = dwarf_formref_die (dwarf_attr (var, DW_AT_type, &attr_mem),
&type_mem);
if (type != NULL)
{
/* Test twice, once with a separate result DIE. Then with the
DIE itself. The resulting tag should be the same. */
Dwarf_Die result_mem;
Dwarf_Die *result = &result_mem;
int res = dwarf_peel_type (type, result);
if (res < 0)
printf ("%s error peeling type: %s\n", name, dwarf_errmsg (-1));
else if (res > 0)
printf ("%s missing DW_TAG_TYPE, could peel further: %s\n",
name, dwarf_tag_string (dwarf_tag (result)));
else
{
int tag = dwarf_tag (result);
printf ("%s raw type %s\n", name, dwarf_tag_string (tag));
res = dwarf_peel_type (type, type);
if (res < 0)
printf ("%s cannot peel type itself: %s\n", name,
dwarf_errmsg (-1));
else if (res > 0)
printf ("%s missing DW_TAG_TYPE, could peel type further: %s\n",
name, dwarf_tag_string (dwarf_tag (type)));
else if (dwarf_tag (type) != tag)
printf ("%s doesn't resolve the same: %s != %s\n", name,
dwarf_tag_string (tag),
dwarf_tag_string (dwarf_tag (type)));
}
}
else
printf ("%s has no type.\n", name);
}
int
main (int argc, char *argv[])
{
int remaining;
Dwfl *dwfl;
(void) argp_parse (dwfl_standard_argp (), argc, argv, 0, &remaining,
&dwfl);
assert (dwfl != NULL);
Dwarf_Die *cu = NULL;
Dwarf_Addr dwbias;
while ((cu = dwfl_nextcu (dwfl, cu, &dwbias)) != NULL)
{
Dwarf_Die die_mem;
Dwarf_Die *die = &die_mem;
dwarf_child (cu, &die_mem);
while (1)
{
if (dwarf_tag (die) == DW_TAG_variable)
print_var_raw_type (die);
if (dwarf_siblingof (die, &die_mem) != 0)
break;
}
}
dwfl_end (dwfl);
}