Go to the documentation of this file.
15 #include <unordered_set>
36 const exprt &e = it->second;
46 const exprt &expr)
const
53 const typet &type)
const
62 if(type.
id() == ID_c_enum_tag)
64 else if(type.
id()==ID_struct_tag)
66 else if(type.
id()==ID_union_tag)
74 const typet &type)
const
78 if(followed.
id()==ID_struct || followed.
id()==ID_union)
82 const std::string &tag=followed.
get_string(ID_tag);
96 const typet &subtype = c.type();
101 if(!c.get_base_name().empty())
114 else if(followed.
id()==ID_pointer)
128 exprt &conflict_path)
131 debug() <<
"<BEGIN DEPTH " << depth <<
">" <<
eom;
140 msg=
"type classes differ";
141 else if(t1.
id()==ID_pointer ||
147 if(conflict_path.
type().
id() == ID_pointer)
158 else if(t1.
id()==ID_pointer)
159 msg=
"pointer types differ";
161 msg=
"array types differ";
163 else if(t1.
id()==ID_struct ||
172 exprt conflict_path_before=conflict_path;
174 if(components1.size()!=components2.size())
176 msg=
"number of members is different (";
182 for(std::size_t i=0; i<components1.size(); ++i)
184 const typet &subtype1=components1[i].type();
185 const typet &subtype2=components2[i].type();
187 if(components1[i].get_name()!=components2[i].get_name())
190 msg+=
id2string(components1[i].get_name())+
'/';
191 msg+=
id2string(components2[i].get_name())+
')';
196 typedef std::unordered_set<typet, irep_hash> type_sett;
197 type_sett parent_types;
199 exprt e=conflict_path_before;
200 while(e.
id()==ID_dereference ||
204 parent_types.insert(e.
type());
205 if(e.
id() == ID_dereference)
207 else if(e.
id() == ID_member)
209 else if(e.
id() == ID_index)
215 conflict_path=conflict_path_before;
216 conflict_path.
type()=t1;
221 parent_types.find(t1)==parent_types.end())
231 msg=
"type of member "+
250 if(parent_types.find(t1)==parent_types.end())
256 else if(t1.
id()==ID_c_enum)
266 msg=
"enum value types are different (";
270 else if(members1.size()!=members2.size())
272 msg=
"number of enum members is different (";
278 for(std::size_t i=0; i<members1.size(); ++i)
287 else if(members1[i].get_value()!=members2[i].get_value())
290 msg+=
id2string(members1[i].get_value())+
'/';
291 msg+=
id2string(members2[i].get_value())+
')';
297 msg+=
"\nenum declarations at\n";
301 else if(t1.
id()==ID_code)
312 if(parameters1.size()!=parameters2.size())
314 msg=
"parameter counts differ (";
333 msg=
"return types differ";
337 for(std::size_t i=0; i<parameters1.size(); i++)
339 const typet &subtype1=parameters1[i].type();
340 const typet &subtype2=parameters2[i].type();
357 msg=
"parameter types differ";
365 msg=
"conflict on POD";
370 error() <<
"reason for conflict at "
379 debug() <<
"<END DEPTH " << depth <<
">" <<
eom;
386 const std::string &msg)
392 error() <<
"old definition in module '" << old_symbol.
module <<
"' "
395 error() <<
"new definition in module '" << new_symbol.
module <<
"' "
403 const std::string &msg)
407 warning() <<
"warning: " << msg <<
" \""
410 warning() <<
"old definition in module " << old_symbol.
module <<
" "
413 warning() <<
"new definition in module " << new_symbol.
module <<
" "
438 return new_identifier;
476 "implicit function declaration");
481 "implicit function declaration");
494 "ignoring conflicting implicit function declaration");
499 "implicit function declaration");
526 "function declaration conflicts with with weak definition");
540 "ignoring conflicting weak function declaration");
554 "ignoring conflicting function alias declaration");
565 "ignoring conflicting function declarations");
585 "conflicting parameter counts of function declarations");
594 std::string warn_msg;
596 typedef std::deque<std::pair<typet, typet> > conflictst;
597 conflictst conflicts;
603 code_typet::parameterst::const_iterator
613 std::make_pair(o_it->type(), n_it->type()));
622 "conflicting parameter counts of function declarations");
637 "conflicting parameter counts of function declarations");
646 while(!conflicts.empty())
653 if((t1.
id()==ID_empty || t2.
id()==ID_empty) &&
657 warn_msg=
"void/non-void return type conflict on function";
663 else if((t1.
id()==ID_pointer || t2.
id()==ID_pointer) &&
668 warn_msg=
"different pointer types in extern function";
673 else if((t1.
id()==ID_pointer || t2.
id()==ID_pointer) &&
678 warn_msg=
"pointer parameter types differ between "
679 "declaration and definition";
685 else if((t1.
id()==ID_union &&
686 (t1.
get_bool(ID_C_transparent_union) ||
687 conflicts.front().first.get_bool(ID_C_transparent_union))) ||
688 (t2.
id()==ID_union &&
689 (t2.
get_bool(ID_C_transparent_union) ||
690 conflicts.front().second.get_bool(ID_C_transparent_union))))
694 (t1.
get_bool(ID_C_transparent_union) ||
695 conflicts.front().first.get_bool(ID_C_transparent_union)) &&
700 const typet &src_type=t1.
id()==ID_union?t2:t1;
708 warn_msg=
"conflict on transparent union parameter in function";
722 warn_msg=
"non-pointer parameter types differ between "
723 "declaration and definition";
729 conflicts.pop_front();
732 if(!conflicts.empty())
737 conflicts.front().first,
738 conflicts.front().second);
743 "conflicting function declarations");
784 warning() <<
"function '" << old_symbol.
name <<
"' in module '"
786 <<
"' is shadowed by a definition in module '"
793 "duplicate definition of function");
806 t1.
id() == ID_struct_tag || t1.
id() == ID_union_tag ||
807 t1.
id() == ID_c_enum_tag)
811 if(info.
o_symbols.insert(identifier).second)
823 t2.
id() == ID_struct_tag || t2.
id() == ID_union_tag ||
824 t2.
id() == ID_c_enum_tag)
828 if(info.
n_symbols.insert(identifier).second)
839 else if(t1.
id()==ID_pointer && t2.
id()==ID_array)
845 else if(t1.
id()==ID_array && t2.
id()==ID_pointer)
880 else if(t1.
id()!=t2.
id())
886 if(t1.
id()==ID_pointer)
895 "conflicting pointer types for variable");
902 "conflicting pointer types for variable");
912 else if(t1.
id()==ID_array &&
925 else if(new_size.
is_nil() ||
940 "conflicting array sizes for variable");
949 else if(t1.
id()==ID_struct || t1.
id()==ID_union)
957 struct_union_typet::componentst::const_iterator
958 it1=components1.begin(), it2=components2.begin();
960 it1!=components1.end() && it2!=components2.end();
963 if(it1->get_name()!=it2->get_name() ||
967 if(it1!=components1.end() || it2!=components2.end())
996 bool set_to_new =
false;
1009 if(old_type.
id()==ID_struct ||
1010 old_type.
id()==ID_union ||
1011 old_type.
id()==ID_array ||
1012 old_type.
id()==ID_c_enum)
1022 "conflicting types for variable");
1049 tmp_new=new_symbol.
value;
1062 warning() <<
"warning: conflicting initializers for"
1063 <<
" variable \"" << old_symbol.
name <<
"\"\n";
1064 warning() <<
"using old value in module " << old_symbol.
module <<
" "
1067 warning() <<
"ignoring new value in module " << new_symbol.
module <<
" "
1087 bool is_code_old_symbol=old_symbol.
type.
id()==ID_code;
1088 bool is_code_new_symbol=new_symbol.
type.
id()==ID_code;
1090 if(is_code_old_symbol!=is_code_new_symbol)
1095 "conflicting definition for symbol");
1101 if(is_code_old_symbol)
1126 "conflicting definition for symbol");
1132 if(old_symbol.
type==new_symbol.
type)
1136 old_symbol.
type.
id() == ID_struct &&
1138 new_symbol.
type.
id() == ID_struct &&
1147 old_symbol.
type.
id() == ID_struct &&
1149 new_symbol.
type.
id() == ID_struct &&
1157 old_symbol.
type.
id() == ID_union &&
1159 new_symbol.
type.
id() == ID_union &&
1168 old_symbol.
type.
id() == ID_union &&
1170 new_symbol.
type.
id() == ID_union &&
1177 if(old_symbol.
type.
id()==ID_array &&
1178 new_symbol.
type.
id()==ID_array &&
1206 "unexpected difference between type symbols");
1218 if(old_symbol.
type==new_symbol.
type)
1222 old_symbol.
type.
id() == ID_struct &&
1224 new_symbol.
type.
id() == ID_struct &&
1229 old_symbol.
type.
id() == ID_struct &&
1231 new_symbol.
type.
id() == ID_struct &&
1236 old_symbol.
type.
id() == ID_union &&
1238 new_symbol.
type.
id() == ID_union &&
1243 old_symbol.
type.
id() == ID_union &&
1245 new_symbol.
type.
id() == ID_union &&
1249 if(old_symbol.
type.
id()==ID_array &&
1250 new_symbol.
type.
id()==ID_array &&
1266 std::unordered_set<irep_idt> &needs_to_be_renamed)
1275 if(symbol_pair.second.is_type)
1281 for(
const auto &symbol_used : symbols_used)
1283 used_by[symbol_used].insert(symbol_pair.first);
1288 std::deque<irep_idt> queue(
1289 needs_to_be_renamed.begin(), needs_to_be_renamed.end());
1291 while(!queue.empty())
1296 const std::unordered_set<irep_idt> &u = used_by[id];
1298 for(
const auto &dep : u)
1299 if(needs_to_be_renamed.insert(dep).second)
1301 queue.push_back(dep);
1303 debug() <<
"LINKING: needs to be renamed (dependency): "
1311 const std::unordered_set<irep_idt> &needs_to_be_renamed)
1315 for(
const irep_idt &
id : needs_to_be_renamed)
1324 new_identifier=
rename(
id);
1326 new_symbol.
name=new_identifier;
1329 debug() <<
"LINKING: renaming " <<
id <<
" to "
1330 << new_identifier <<
eom;
1342 std::map<irep_idt, symbolt> src_symbols;
1346 symbolt symbol=named_symbol.second;
1351 src_symbols.emplace(named_symbol.first, std::move(symbol));
1355 std::unordered_set<irep_idt> collisions;
1357 for(
const auto &named_symbol : src_symbols)
1360 if(named_symbol.first!=named_symbol.second.name)
1373 collisions.insert(named_symbol.first);
1378 for(
const irep_idt &collision : collisions)
1381 symbolt &new_symbol=src_symbols.at(collision);
1392 if(!named_symbol.second.is_type &&
1393 !named_symbol.second.is_macro &&
1394 named_symbol.second.value.is_not_nil())
1410 std::unordered_set<irep_idt> needs_to_be_renamed;
1414 symbol_tablet::symbolst::const_iterator m_it =
1421 needs_to_be_renamed.insert(symbol_pair.first);
1423 debug() <<
"LINKING: needs to be renamed: " << symbol_pair.first <<
eom;
1444 dest_symbol_table, new_symbol_table, message_handler);
1446 return linking.typecheck_main();
bool needs_renaming_type(const symbolt &old_symbol, const symbolt &new_symbol)
const union_tag_typet & to_union_tag_type(const typet &type)
Cast a typet to a union_tag_typet.
bool adjust_object_type(const symbolt &old_symbol, const symbolt &new_symbol, bool &set_to_new)
const irep_idt & get_identifier() const
#define UNREACHABLE
This should be used to mark dead code.
const componentst & components() const
symbol_table_baset & src_symbol_table
bool has_symbol(const irep_idt &name) const
Check whether a symbol exists in the symbol table.
dstringt has one field, an unsigned integer no which is an index into a static table of strings.
const union_typet & to_union_type(const typet &type)
Cast a typet to a union_typet.
bool has_ellipsis() const
std::string get_base_name(const std::string &in, bool strip_suffix)
cleans a filename from path and extension
static exprt conditional_cast(const exprt &expr, const typet &type)
bool needs_renaming(const symbolt &old_symbol, const symbolt &new_symbol)
const typet & subtype() const
std::string as_string() const
void find_type_and_expr_symbols(const exprt &src, find_symbols_sett &dest)
const struct_typet & to_struct_type(const typet &type)
Cast a typet to a struct_typet.
const symbolt & new_symbol
const struct_union_typet & to_struct_union_type(const typet &type)
Cast a typet to a struct_union_typet.
const dereference_exprt & to_dereference_expr(const exprt &expr)
Cast an exprt to a dereference_exprt.
std::string type_to_name(const namespacet &ns, const irep_idt &identifier, const typet &type)
const irep_idt & display_name() const
Return language specific display name if present.
casting_replace_symbolt object_type_updates
The type of an expression, extends irept.
std::vector< parametert > parameterst
std::string type_to_string_verbose(const symbolt &symbol, const typet &type) const
const index_exprt & to_index_expr(const exprt &expr)
Cast an exprt to an index_exprt.
typet type
Type of symbol.
Operator to dereference a pointer.
std::vector< c_enum_membert > memberst
static symbol_exprt typeless(const irep_idt &id)
Generate a symbol_exprt without a proper type.
const c_enum_typet & to_c_enum_type(const typet &type)
Cast a typet to a c_enum_typet.
std::string type_to_string(const irep_idt &identifier, const typet &type) const
void replace(const union_find_replacet &replace_map, string_not_contains_constraintt &constraint)
Unbounded, signed integers (mathematical integers, not bitvectors)
bool needs_renaming_non_type(const symbolt &old_symbol, const symbolt &new_symbol)
Base class for all expressions.
std::vector< componentt > componentst
const union_typet & follow_tag(const union_tag_typet &) const
Follow type tag of union type.
std::string from_type(const namespacet &ns, const irep_idt &identifier, const typet &type)
std::string to_string(const string_not_contains_constraintt &expr)
Used for debug printing.
Expression to hold a symbol (variable)
void link_warning(const symbolt &old_symbol, const symbolt &new_symbol, const std::string &msg)
void duplicate_code_symbol(symbolt &old_symbol, symbolt &new_symbol)
symbol_table_baset & main_symbol_table
const exprt & size() const
A namespacet is essentially one or two symbol tables bound together, to allow for symbol lookups in t...
typet & type()
Return the type of the expression.
bool get_bool(const irep_namet &name) const
const code_typet & to_code_type(const typet &type)
Cast a typet to a code_typet.
bool adjust_object_type_rec(const typet &type1, const typet &type2, adjust_type_infot &info)
std::unordered_map< irep_idt, std::unordered_set< irep_idt > > used_byt
mstreamt & result() const
const tag_typet & to_tag_type(const typet &type)
Cast a typet to a tag_typet.
static const typet & follow_tags_symbols(const namespacet &ns, const typet &type)
void do_type_dependencies(std::unordered_set< irep_idt > &)
symbolt & get_writeable_ref(const irep_idt &name)
Find a symbol in the symbol table for read-write access.
const std::string & id2string(const irep_idt &d)
const exprt & compound() const
static bool failed(bool error_indicator)
source_locationt source_location
const c_enum_tag_typet & to_c_enum_tag_type(const typet &type)
Cast a typet to a c_enum_tag_typet.
bool base_type_eq(const typet &type1, const typet &type2, const namespacet &ns)
Check types for equality across all levels of hierarchy.
bool linking(symbol_tablet &dest_symbol_table, symbol_tablet &new_symbol_table, message_handlert &message_handler)
const source_locationt & source_location() const
const source_locationt & find_source_location() const
Get a source_locationt from the expression or from its operands (non-recursively).
const irep_idt & get_identifier() const
optionalt< mp_integer > pointer_offset_bits(const typet &type, const namespacet &ns)
bool replace_symbol_expr(symbol_exprt &dest) const override
class symbol_exprt symbol_expr() const
Produces a symbol_exprt for a symbol.
API to expression classes for Pointers.
const std::string & id_string() const
bool simplify(exprt &expr, const namespacet &ns)
exprt simplify_expr(exprt src, const namespacet &ns)
void duplicate_non_type_symbol(symbolt &old_symbol, symbolt &new_symbol)
const irep_idt & id() const
const struct_tag_typet & to_struct_tag_type(const typet &type)
Cast a typet to a struct_tag_typet.
irep_idt rename(irep_idt)
void detailed_conflict_report_rec(const symbolt &old_symbol, const symbolt &new_symbol, const typet &type1, const typet &type2, unsigned depth, exprt &conflict_path)
void insert(const class symbol_exprt &old_expr, const exprt &new_expr)
Sets old_expr to be replaced by new_expr if we don't already have a replacement; otherwise does nothi...
void duplicate_object_symbol(symbolt &old_symbol, symbolt &new_symbol)
const parameterst & parameters() const
std::string expr_to_string(const irep_idt &identifier, const exprt &expr) const
rename_symbolt rename_symbol
void link_error(const symbolt &old_symbol, const symbolt &new_symbol, const std::string &msg)
bool is_zero() const
Return whether the expression is a constant representing 0.
bool add(const symbolt &symbol)
Add a new symbol to the symbol table.
Extract member of struct or union.
const std::string & get_string(const irep_namet &name) const
exprt value
Initial value of symbol.
std::unordered_set< irep_idt > find_symbols_sett
void duplicate_type_symbol(symbolt &old_symbol, const symbolt &new_symbol)
source_locationt location
Source code location of definition of symbol.
const symbolst & symbols
Read-only field, used to look up symbols given their names.
void insert_expr(const irep_idt &old_id, const irep_idt &new_id)
void detailed_conflict_report(const symbolt &old_symbol, const symbolt &new_symbol, const typet &type1, const typet &type2)
const array_typet & to_array_type(const typet &type)
Cast a typet to an array_typet.
std::unordered_set< irep_idt > renamed_ids
const typet & return_type() const
const member_exprt & to_member_expr(const exprt &expr)
Cast an exprt to a member_exprt.
std::unordered_set< irep_idt > n_symbols
const symbolt & old_symbol
Semantic type conversion.
A constant literal expression.
irep_idt module
Name of module the symbol belongs to.
bool is_true(const literalt &l)
mstreamt & warning() const
bool is_incomplete() const
A struct/union may be incomplete.
std::unordered_set< irep_idt > o_symbols
std::string from_expr(const namespacet &ns, const irep_idt &identifier, const exprt &expr)
irep_idt name
The unique identifier.
void insert_type(const irep_idt &old_id, const irep_idt &new_id)
void rename_symbols(const std::unordered_set< irep_idt > &needs_to_be_renamed)
const memberst & members() const