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/*
Copyright (C) 2009,2010,2011 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 "../libdw/c++/dwarf-knowledge.cc"
#include "../libdw/c++/dwarf"
#include "check_debug_info.hh"
#include "highlevel_check.hh"
#include "expected.hh"
#include "messages.hh"
using elfutils::dwarf;
namespace
{
class check_expected_trees
: public highlevel_check<check_expected_trees>
{
public:
static checkdescriptor const *descriptor () {
static checkdescriptor cd
(checkdescriptor::create ("check_expected_trees")
.description (
"Checks whether all DIEs have the right attributes and the right children.\n"
"Currently this is very much a work in progress.\n"));
return &cd;
}
check_expected_trees (checkstack &stack, dwarflint &lint);
};
reg<check_expected_trees> reg_check_expected_trees;
const expected_at_map expected_at;
//static const expected_children_map expected_children;
struct name_extractor {
int operator () (dwarf::attribute const &at) {
return at.first;
}
} extract_name;
std::ostream &
operator << (std::ostream &o, dwarf::value_space vs)
{
switch (vs)
{
case dwarf::VS_flag: return o << "flag";
case dwarf::VS_dwarf_constant: return o << "dwarf_constant";
case dwarf::VS_discr_list: return o << "discr_list";
case dwarf::VS_reference: return o << "reference";
case dwarf::VS_lineptr: return o << "lineptr";
case dwarf::VS_macptr: return o << "macptr";
case dwarf::VS_rangelistptr: return o << "rangelistptr";
case dwarf::VS_identifier: return o << "identifier";
case dwarf::VS_string: return o << "string";
case dwarf::VS_source_file: return o << "source_file";
case dwarf::VS_source_line: return o << "source_line";
case dwarf::VS_source_column: return o << "source_column";
case dwarf::VS_address: return o << "address";
case dwarf::VS_constant: return o << "constant";
case dwarf::VS_location: return o << "location";
};
abort ();
}
}
check_expected_trees::check_expected_trees (checkstack &stack, dwarflint &lint)
: highlevel_check<check_expected_trees> (stack, lint)
{
lint.check <check_debug_info> (stack);
try
{
struct
{
void operator () (dwarf::compile_unit const &cu,
dwarf::debug_info_entry const &parent)
{
die_locus where (parent);
int parent_tag = parent.tag ();
// Set of attributes of this DIE.
std::set <int> attributes;
std::transform (parent.attributes ().begin (),
parent.attributes ().end (),
std::inserter (attributes, attributes.end ()),
extract_name);
// Attributes that we expect at this DIE.
expected_set::expectation_map const &expect
= expected_at.map (parent_tag);
// Check missing attributes.
for (expected_set::expectation_map::const_iterator jt
= expect.begin (); jt != expect.end (); ++jt)
{
std::set <int>::iterator kt = attributes.find (jt->first);
char const *what = NULL;
if (kt == attributes.end ())
switch (jt->second)
{
case opt_required:
what = " lacks required attribute ";
// FALL_THROUGH
case opt_expected:
if (what == NULL)
what = " should contain attribute ";
wr_message (where, mc_impact_2 | mc_info)
<< elfutils::dwarf::tags::name (parent_tag) << what
<< elfutils::dwarf::attributes::name (jt->first) << '.'
<< std::endl;
break;
case opt_optional:
break;
};
}
// Check present attributes for expected-ness, and validate
// value space.
for (dwarf::debug_info_entry::attributes_type::const_iterator
jt = parent.attributes ().begin (),
jte = parent.attributes ().end ();
jt != jte; ++jt)
{
unsigned name = extract_name (*jt);
expected_set::expectation_map::const_iterator
kt = expect.find (name);
if (kt == expect.end ())
wr_message (where, mc_impact_3 | mc_info)
<< ": DIE \"" << dwarf::tags::name (parent_tag)
<< "\" has attribute \"" << dwarf::attributes::name (name)
<< "\", which is not expected." << std::endl;
try
{
unsigned exp_vs = expected_value_space (name, parent_tag);
dwarf::value_space vs = (*jt).second.what_space ();
if ((exp_vs & (1U << vs)) == 0)
wr_message (where, mc_impact_3 | mc_info)
<< ": in DIE \"" << dwarf::tags::name (parent_tag)
<< "\", attribute \"" << dwarf::attributes::name (name)
<< "\" has value of unexpected type \"" << vs
<< "\"." << std::endl;
}
// XXX more specific class when <dwarf> has it
catch (...)
{
wr_message (where, mc_impact_4 | mc_info | mc_error)
<< ": in DIE \"" << dwarf::tags::name (parent_tag)
<< "\", couldn't obtain type of attribute \""
<< dwarf::attributes::name (name) << "\"."
<< std::endl;
}
}
// Check children recursively.
dwarf::debug_info_entry::children_type const &children
= parent.children ();
for (dwarf::debug_info_entry::children_type::const_iterator
jt = children.begin (); jt != children.end (); ++jt)
(*this) (cu, *jt);
}
} recursively_validate;
class dwarf::compile_units_type const &cus = dw.compile_units ();
for (dwarf::compile_units_type::const_iterator it = cus.begin ();
it != cus.end (); ++it)
recursively_validate (*it, *it);
}
// XXX more specific class when <dwarf> has it
catch (std::runtime_error &exc)
{
wr_error (section_locus (sec_info))
<< "Exception while checking expected trees: " << exc.what ()
<< std::endl;
throw check_base::failed ();
}
}
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