CBMC
generate_function_bodies.cpp
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1 /*******************************************************************\
2 
3 Module: Replace bodies of goto functions
4 
5 Author: Diffblue Ltd.
6 
7 \*******************************************************************/
8 
10 
11 #include <util/fresh_symbol.h>
12 #include <util/pointer_expr.h>
13 #include <util/prefix.h>
14 #include <util/string2int.h>
15 #include <util/string_utils.h>
16 
19 
23 
25  goto_functiont &function,
26  symbol_tablet &symbol_table,
27  const irep_idt &function_name) const
28 {
29  PRECONDITION(!function.body_available());
30  generate_parameter_names(function, symbol_table, function_name);
31  generate_function_body_impl(function, symbol_table, function_name);
32 }
33 
35  goto_functiont &function,
36  symbol_tablet &symbol_table,
37  const irep_idt &function_name) const
38 {
39  auto &function_symbol = symbol_table.get_writeable_ref(function_name);
40  auto &parameters = to_code_type(function_symbol.type).parameters();
41 
42  int param_counter = 0;
43  for(auto &parameter : parameters)
44  {
45  if(parameter.get_identifier().empty())
46  {
47  const std::string param_base_name =
48  parameter.get_base_name().empty()
49  ? "__param$" + std::to_string(param_counter++)
50  : id2string(parameter.get_base_name());
51  irep_idt new_param_identifier =
52  id2string(function_name) + "::" + param_base_name;
53  parameter.set_base_name(param_base_name);
54  parameter.set_identifier(new_param_identifier);
55  parameter_symbolt new_param_sym;
56  new_param_sym.name = new_param_identifier;
57  new_param_sym.type = parameter.type();
58  new_param_sym.base_name = param_base_name;
59  new_param_sym.mode = function_symbol.mode;
60  new_param_sym.module = function_symbol.module;
61  new_param_sym.location = function_symbol.location;
62  symbol_table.add(new_param_sym);
63  }
64  }
65  function.set_parameter_identifiers(to_code_type(function_symbol.type));
66 }
67 
69 {
70 protected:
72  goto_functiont &function,
73  symbol_tablet &symbol_table,
74  const irep_idt &function_name) const override
75  {
76  auto const &function_symbol = symbol_table.lookup_ref(function_name);
77  source_locationt location = function_symbol.location;
78  location.set_function(function_name);
79 
80  function.body.add(goto_programt::make_assumption(false_exprt(), location));
81  function.body.add(goto_programt::make_end_function(location));
82  }
83 };
84 
86 {
87 protected:
89  goto_functiont &function,
90  symbol_tablet &symbol_table,
91  const irep_idt &function_name) const override
92  {
93  auto const &function_symbol = symbol_table.lookup_ref(function_name);
94 
95  source_locationt annotated_location = function_symbol.location;
96  annotated_location.set_function(function_name);
97  annotated_location.set_comment("undefined function should be unreachable");
98  annotated_location.set_property_class(ID_assertion);
99  function.body.add(
100  goto_programt::make_assertion(false_exprt(), annotated_location));
101 
102  source_locationt location = function_symbol.location;
103  location.set_function(function_name);
104  function.body.add(goto_programt::make_end_function(location));
105  }
106 };
107 
110 {
111 protected:
113  goto_functiont &function,
114  symbol_tablet &symbol_table,
115  const irep_idt &function_name) const override
116  {
117  auto const &function_symbol = symbol_table.lookup_ref(function_name);
118 
119  source_locationt annotated_location = function_symbol.location;
120  annotated_location.set_function(function_name);
121  annotated_location.set_comment("undefined function should be unreachable");
122  annotated_location.set_property_class(ID_assertion);
123  function.body.add(
124  goto_programt::make_assertion(false_exprt(), annotated_location));
125 
126  source_locationt location = function_symbol.location;
127  location.set_function(function_name);
128  function.body.add(goto_programt::make_assumption(false_exprt(), location));
129  function.body.add(goto_programt::make_end_function(location));
130  }
131 };
132 
134 {
135 public:
137  std::vector<irep_idt> globals_to_havoc,
138  std::regex parameters_to_havoc,
140  message_handlert &message_handler)
145  message(message_handler)
146  {
147  }
148 
150  std::vector<irep_idt> globals_to_havoc,
151  std::vector<std::size_t> param_numbers_to_havoc,
153  message_handlert &message_handler)
158  message(message_handler)
159  {
160  }
161 
162 private:
164  const exprt &lhs,
165  const std::size_t initial_depth,
166  const source_locationt &source_location,
167  const irep_idt &function_id,
168  symbol_tablet &symbol_table,
169  goto_programt &dest) const
170  {
171  symbol_factoryt symbol_factory(
172  symbol_table,
173  source_location,
174  function_id,
177 
178  code_blockt assignments;
179 
180  symbol_factory.gen_nondet_init(
181  assignments,
182  lhs,
183  initial_depth,
185  false); // do not initialize const objects at the top level
186 
187  code_blockt init_code;
188 
189  symbol_factory.declare_created_symbols(init_code);
190  init_code.append(assignments);
191 
192  goto_programt tmp_dest;
193  goto_convert(
194  init_code, symbol_table, tmp_dest, message.get_message_handler(), ID_C);
195 
196  dest.destructive_append(tmp_dest);
197  }
198 
200  const std::string &param_name,
201  std::size_t param_number) const
202  {
203  if(parameters_to_havoc.has_value())
204  {
205  return std::regex_match(param_name, *parameters_to_havoc);
206  }
207  else
208  {
210  return std::binary_search(
211  param_numbers_to_havoc->begin(),
212  param_numbers_to_havoc->end(),
213  param_number);
214  }
215  }
216 
217 protected:
219  goto_functiont &function,
220  symbol_tablet &symbol_table,
221  const irep_idt &function_name) const override
222  {
223  const namespacet ns(symbol_table);
224  // some user input checking
225  if(param_numbers_to_havoc.has_value() && !param_numbers_to_havoc->empty())
226  {
227  auto max_param_number = std::max_element(
229  if(*max_param_number >= function.parameter_identifiers.size())
230  {
232  "function " + id2string(function_name) + " does not take " +
233  std::to_string(*max_param_number + 1) + " arguments",
234  "--generate-havocing-body"};
235  }
236  for(const auto number : *param_numbers_to_havoc)
237  {
238  const auto &parameter = function.parameter_identifiers[number];
239  const symbolt &parameter_symbol = ns.lookup(parameter);
240  if(parameter_symbol.type.id() != ID_pointer)
241  {
243  "argument number " + std::to_string(number) + " of function " +
244  id2string(function_name) + " is not a pointer",
245  "--generate-havocing-body"};
246  }
247  }
248  }
249 
250  auto const &function_symbol = symbol_table.lookup_ref(function_name);
251  source_locationt location = function_symbol.location;
252  location.set_function(function_name);
253 
254  for(std::size_t i = 0; i < function.parameter_identifiers.size(); ++i)
255  {
256  const auto &parameter = function.parameter_identifiers[i];
257  const symbolt &parameter_symbol = ns.lookup(parameter);
258  if(
259  parameter_symbol.type.id() == ID_pointer &&
260  !to_pointer_type(parameter_symbol.type)
261  .base_type()
262  .get_bool(ID_C_constant) &&
263  should_havoc_param(id2string(parameter_symbol.base_name), i))
264  {
265  auto goto_instruction =
266  function.body.add(goto_programt::make_incomplete_goto(
267  equal_exprt(
268  parameter_symbol.symbol_expr(),
269  null_pointer_exprt(to_pointer_type(parameter_symbol.type))),
270  location));
271 
272  dereference_exprt dereference_expr(
273  parameter_symbol.symbol_expr(),
274  to_pointer_type(parameter_symbol.type).base_type());
275 
276  goto_programt dest;
278  dereference_expr,
279  1, // depth 1 since we pass the dereferenced pointer
280  location,
281  function_name,
282  symbol_table,
283  dest);
284 
285  function.body.destructive_append(dest);
286 
287  auto label_instruction =
288  function.body.add(goto_programt::make_skip(location));
289  goto_instruction->complete_goto(label_instruction);
290  }
291  }
292 
293  for(auto const &global_id : globals_to_havoc)
294  {
295  auto const &global_sym = symbol_table.lookup_ref(global_id);
296 
297  goto_programt dest;
298 
300  symbol_exprt(global_sym.name, global_sym.type),
301  0,
302  location,
303  irep_idt(),
304  symbol_table,
305  dest);
306 
307  function.body.destructive_append(dest);
308  }
309 
310  const typet &return_type = to_code_type(function_symbol.type).return_type();
311  if(return_type != empty_typet())
312  {
313  typet type(return_type);
314  type.remove(ID_C_constant);
315 
316  symbolt &aux_symbol = get_fresh_aux_symbol(
317  type,
318  id2string(function_name),
319  "return_value",
320  location,
321  ID_C,
322  symbol_table);
323 
324  aux_symbol.is_static_lifetime = false;
325 
326  function.body.add(
327  goto_programt::make_decl(aux_symbol.symbol_expr(), location));
328 
329  goto_programt dest;
330 
332  aux_symbol.symbol_expr(),
333  0,
334  location,
335  function_name,
336  symbol_table,
337  dest);
338 
339  function.body.destructive_append(dest);
340 
341  exprt return_expr =
342  typecast_exprt::conditional_cast(aux_symbol.symbol_expr(), return_type);
343 
344  function.body.add(
345  goto_programt::make_set_return_value(std::move(return_expr), location));
346 
347  function.body.add(
348  goto_programt::make_dead(aux_symbol.symbol_expr(), location));
349  }
350 
351  function.body.add(goto_programt::make_end_function(location));
352 
353  remove_skip(function.body);
354  }
355 
356 private:
357  const std::vector<irep_idt> globals_to_havoc;
358  std::optional<std::regex> parameters_to_havoc;
359  std::optional<std::vector<std::size_t>> param_numbers_to_havoc;
361  mutable messaget message;
362 };
363 
364 class generate_function_bodies_errort : public std::runtime_error
365 {
366 public:
367  explicit generate_function_bodies_errort(const std::string &reason)
368  : runtime_error(reason)
369  {
370  }
371 };
372 
375 std::unique_ptr<generate_function_bodiest> generate_function_bodies_factory(
376  const std::string &options,
377  const c_object_factory_parameterst &object_factory_parameters,
378  const symbol_tablet &symbol_table,
379  message_handlert &message_handler)
380 {
381  if(options.empty() || options == "nondet-return")
382  {
383  return std::make_unique<havoc_generate_function_bodiest>(
384  std::vector<irep_idt>{},
385  std::regex{},
386  object_factory_parameters,
387  message_handler);
388  }
389 
390  if(options == "assume-false")
391  {
392  return std::make_unique<assume_false_generate_function_bodiest>();
393  }
394 
395  if(options == "assert-false")
396  {
397  return std::make_unique<assert_false_generate_function_bodiest>();
398  }
399 
400  if(options == "assert-false-assume-false")
401  {
402  return std::make_unique<
404  }
405 
406  const std::vector<std::string> option_components = split_string(options, ',');
407  if(!option_components.empty() && option_components[0] == "havoc")
408  {
409  std::regex globals_regex;
410  std::regex params_regex;
411  std::vector<std::size_t> param_numbers;
412  for(std::size_t i = 1; i < option_components.size(); ++i)
413  {
414  const std::vector<std::string> key_value_pair =
415  split_string(option_components[i], ':');
416  if(key_value_pair.size() != 2)
417  {
419  "Expected key_value_pair of form argument:value");
420  }
421  if(key_value_pair[0] == "globals")
422  {
423  globals_regex = key_value_pair[1];
424  }
425  else if(key_value_pair[0] == "params")
426  {
427  auto param_identifiers = split_string(key_value_pair[1], ';');
428  if(param_identifiers.size() == 1)
429  {
430  auto maybe_nondet_param_number =
431  string2optional_size_t(param_identifiers.back());
432  if(!maybe_nondet_param_number.has_value())
433  {
434  params_regex = key_value_pair[1];
435  continue;
436  }
437  }
439  param_identifiers.begin(),
440  param_identifiers.end(),
441  std::back_inserter(param_numbers),
442  [](const std::string &param_id) {
443  auto maybe_nondet_param_number = string2optional_size_t(param_id);
444  INVARIANT(
445  maybe_nondet_param_number.has_value(),
446  param_id + " not a number");
447  return *maybe_nondet_param_number;
448  });
449  std::sort(param_numbers.begin(), param_numbers.end());
450  }
451  else
452  {
454  "Unknown option \"" + key_value_pair[0] + "\"");
455  }
456  }
457  std::vector<irep_idt> globals_to_havoc;
458  namespacet ns(symbol_table);
459  messaget messages(message_handler);
460  const std::regex cprover_prefix = std::regex("__CPROVER.*");
461  for(auto const &symbol : symbol_table.symbols)
462  {
463  if(
464  symbol.second.is_lvalue && symbol.second.is_static_lifetime &&
465  std::regex_match(id2string(symbol.first), globals_regex))
466  {
467  if(std::regex_match(id2string(symbol.first), cprover_prefix))
468  {
469  messages.warning() << "generate function bodies: "
470  << "matched global '" << id2string(symbol.first)
471  << "' begins with __CPROVER, "
472  << "havoc-ing this global may interfere"
473  << " with analysis" << messaget::eom;
474  }
475  globals_to_havoc.push_back(symbol.first);
476  }
477  }
478  if(param_numbers.empty())
479  return std::make_unique<havoc_generate_function_bodiest>(
480  std::move(globals_to_havoc),
481  std::move(params_regex),
482  object_factory_parameters,
483  message_handler);
484  else
485  return std::make_unique<havoc_generate_function_bodiest>(
486  std::move(globals_to_havoc),
487  std::move(param_numbers),
488  object_factory_parameters,
489  message_handler);
490  }
491  throw generate_function_bodies_errort("Can't parse \"" + options + "\"");
492 }
493 
502  const std::regex &functions_regex,
503  const generate_function_bodiest &generate_function_body,
504  goto_modelt &model,
505  message_handlert &message_handler)
506 {
507  messaget messages(message_handler);
508  const std::regex cprover_prefix = std::regex("__CPROVER.*");
509  bool did_generate_body = false;
510  for(auto &function : model.goto_functions.function_map)
511  {
512  if(
513  !function.second.body_available() &&
514  std::regex_match(id2string(function.first), functions_regex))
515  {
516  if(std::regex_match(id2string(function.first), cprover_prefix))
517  {
518  messages.warning() << "generate function bodies: matched function '"
519  << id2string(function.first)
520  << "' begins with __CPROVER "
521  << "the generated body for this function "
522  << "may interfere with analysis" << messaget::eom;
523  }
524  did_generate_body = true;
525  generate_function_body.generate_function_body(
526  function.second, model.symbol_table, function.first);
527  }
528  }
529  if(!did_generate_body)
530  {
531  messages.warning()
532  << "generate function bodies: No function name matched regex"
533  << messaget::eom;
534  }
535 }
536 
538  const std::string &function_name,
539  const std::string &call_site_id,
540  const generate_function_bodiest &generate_function_body,
541  goto_modelt &model,
542  message_handlert &message_handler)
543 {
544  PRECONDITION(!has_prefix(function_name, CPROVER_PREFIX));
545  auto call_site_number = string2optional_size_t(call_site_id);
546  PRECONDITION(call_site_number.has_value());
547 
548  messaget messages(message_handler);
549 
550  bool found = false;
551  irep_idt function_mode;
552  typet function_type;
553 
554  // get the mode and type from symbol table
555  for(auto const &symbol_pair : model.symbol_table)
556  {
557  auto const symbol = symbol_pair.second;
558  if(symbol.type.id() == ID_code && symbol.name == function_name)
559  {
560  function_mode = symbol.mode;
561  function_type = symbol.type;
562  found = true;
563  break;
564  }
565  }
566  CHECK_RETURN(found);
567 
568  // add function of the right name to the symbol table
569  symbolt havoc_function_symbol{};
570  havoc_function_symbol.name = havoc_function_symbol.base_name =
571  havoc_function_symbol.pretty_name = function_name + "." + call_site_id;
572 
573  havoc_function_symbol.is_lvalue = true;
574  havoc_function_symbol.mode = function_mode;
575  havoc_function_symbol.type = function_type;
576 
577  model.symbol_table.insert(havoc_function_symbol);
578 
579  auto const &generated_havoc =
580  model.symbol_table.lookup_ref(havoc_function_symbol.name);
581 
582  // convert to get the function stub to goto-model
583  goto_convert(model.symbol_table, model.goto_functions, message_handler);
584 
585  // now generate body as above
586  for(auto &function : model.goto_functions.function_map)
587  {
588  if(
589  !function.second.body_available() &&
590  havoc_function_symbol.name == id2string(function.first))
591  {
592  generate_function_body.generate_function_body(
593  function.second, model.symbol_table, function.first);
594  }
595  }
596 
597  auto is_havoc_function_call = [&function_name](const exprt &expr) {
598  if(expr.id() != ID_symbol)
599  return false;
600  std::string called_function_name =
601  id2string(to_symbol_expr(expr).get_identifier());
602  if(called_function_name == function_name)
603  return true;
604 
605  return (has_prefix(called_function_name, function_name + "."));
606  };
607 
608  // finally, rename the (right) call site
609  std::size_t counter = 0;
610  for(auto &function : model.goto_functions.function_map)
611  {
612  for(auto &instruction : function.second.body.instructions)
613  {
614  if(instruction.is_function_call())
615  {
616  auto &called_function = instruction.call_function();
617  if(is_havoc_function_call(called_function))
618  {
619  if(++counter == *call_site_number)
620  {
621  called_function = generated_havoc.symbol_expr();
622  return;
623  }
624  }
625  }
626  }
627  }
628 }
static abstract_object_pointert transform(const exprt &expr, const std::vector< abstract_object_pointert > &operands, const abstract_environmentt &environment, const namespacet &ns)
@ DYNAMIC
Allocate dynamic objects (using ALLOCATE)
C Nondet Symbol Factory.
void generate_function_body_impl(goto_functiont &function, symbol_tablet &symbol_table, const irep_idt &function_name) const override
Produce a body for the passed function At this point the body of function is always empty,...
void generate_function_body_impl(goto_functiont &function, symbol_tablet &symbol_table, const irep_idt &function_name) const override
Produce a body for the passed function At this point the body of function is always empty,...
void generate_function_body_impl(goto_functiont &function, symbol_tablet &symbol_table, const irep_idt &function_name) const override
Produce a body for the passed function At this point the body of function is always empty,...
A codet representing sequential composition of program statements.
Definition: std_code.h:130
void append(const code_blockt &extra_block)
Add all the codets from extra_block to the current code_blockt.
Definition: std_code.cpp:86
const typet & return_type() const
Definition: std_types.h:689
const parameterst & parameters() const
Definition: std_types.h:699
Operator to dereference a pointer.
Definition: pointer_expr.h:834
dstringt has one field, an unsigned integer no which is an index into a static table of strings.
Definition: dstring.h:38
The empty type.
Definition: std_types.h:51
Equality.
Definition: std_expr.h:1366
Base class for all expressions.
Definition: expr.h:56
The Boolean constant false.
Definition: std_expr.h:3077
generate_function_bodies_errort(const std::string &reason)
Base class for replace_function_body implementations.
void generate_function_body(goto_functiont &function, symbol_tablet &symbol_table, const irep_idt &function_name) const
Replace the function body with one based on the replace_function_body class being used.
void generate_parameter_names(goto_functiont &function, symbol_tablet &symbol_table, const irep_idt &function_name) const
Generate parameter names for unnamed parameters.
virtual void generate_function_body_impl(goto_functiont &function, symbol_tablet &symbol_table, const irep_idt &function_name) const =0
Produce a body for the passed function At this point the body of function is always empty,...
function_mapt function_map
A goto function, consisting of function body (see body) and parameter identifiers (see parameter_iden...
Definition: goto_function.h:24
symbol_tablet symbol_table
Symbol table.
Definition: goto_model.h:31
goto_functionst goto_functions
GOTO functions.
Definition: goto_model.h:34
A generic container class for the GOTO intermediate representation of one function.
Definition: goto_program.h:73
static instructiont make_assumption(const exprt &g, const source_locationt &l=source_locationt::nil())
Definition: goto_program.h:945
static instructiont make_set_return_value(exprt return_value, const source_locationt &l=source_locationt::nil())
Definition: goto_program.h:874
static instructiont make_dead(const symbol_exprt &symbol, const source_locationt &l=source_locationt::nil())
Definition: goto_program.h:971
static instructiont make_end_function(const source_locationt &l=source_locationt::nil())
void destructive_append(goto_programt &p)
Appends the given program p to *this. p is destroyed.
Definition: goto_program.h:722
static instructiont make_skip(const source_locationt &l=source_locationt::nil())
Definition: goto_program.h:891
static instructiont make_decl(const symbol_exprt &symbol, const source_locationt &l=source_locationt::nil())
Definition: goto_program.h:964
static instructiont make_assertion(const exprt &g, const source_locationt &l=source_locationt::nil())
Definition: goto_program.h:933
static instructiont make_incomplete_goto(const exprt &_cond, const source_locationt &l=source_locationt::nil())
havoc_generate_function_bodiest(std::vector< irep_idt > globals_to_havoc, std::vector< std::size_t > param_numbers_to_havoc, const c_object_factory_parameterst &object_factory_parameters, message_handlert &message_handler)
std::optional< std::vector< std::size_t > > param_numbers_to_havoc
const std::vector< irep_idt > globals_to_havoc
havoc_generate_function_bodiest(std::vector< irep_idt > globals_to_havoc, std::regex parameters_to_havoc, const c_object_factory_parameterst &object_factory_parameters, message_handlert &message_handler)
bool should_havoc_param(const std::string &param_name, std::size_t param_number) const
std::optional< std::regex > parameters_to_havoc
void generate_function_body_impl(goto_functiont &function, symbol_tablet &symbol_table, const irep_idt &function_name) const override
Produce a body for the passed function At this point the body of function is always empty,...
const c_object_factory_parameterst & object_factory_parameters
void havoc_expr_rec(const exprt &lhs, const std::size_t initial_depth, const source_locationt &source_location, const irep_idt &function_id, symbol_tablet &symbol_table, goto_programt &dest) const
Thrown when users pass incorrect command line arguments, for example passing no files to analysis or ...
bool get_bool(const irep_idt &name) const
Definition: irep.cpp:57
void remove(const irep_idt &name)
Definition: irep.cpp:87
const irep_idt & id() const
Definition: irep.h:388
Class that provides messages with a built-in verbosity 'level'.
Definition: message.h:154
mstreamt & warning() const
Definition: message.h:396
message_handlert & get_message_handler()
Definition: message.h:183
static eomt eom
Definition: message.h:289
A namespacet is essentially one or two symbol tables bound together, to allow for symbol lookups in t...
Definition: namespace.h:94
bool lookup(const irep_idt &name, const symbolt *&symbol) const override
See documentation for namespace_baset::lookup().
Definition: namespace.cpp:148
The null pointer constant.
Definition: pointer_expr.h:909
Symbol table entry of function parameterThis is a symbol generated as part of type checking.
Definition: symbol.h:179
const typet & base_type() const
The type of the data what we point to.
Definition: pointer_expr.h:35
void set_comment(const irep_idt &comment)
void set_property_class(const irep_idt &property_class)
void set_function(const irep_idt &function)
Expression to hold a symbol (variable)
Definition: std_expr.h:131
void gen_nondet_init(code_blockt &assignments, const exprt &expr, const std::size_t depth=0, recursion_sett recursion_set=recursion_sett(), const bool assign_const=true)
Creates a nondet for expr, including calling itself recursively to make appropriate symbols to point ...
std::set< irep_idt > recursion_sett
void declare_created_symbols(code_blockt &init_code)
symbolt & get_writeable_ref(const irep_idt &name)
Find a symbol in the symbol table for read-write access.
const symbolst & symbols
Read-only field, used to look up symbols given their names.
const symbolt & lookup_ref(const irep_idt &name) const
Find a symbol in the symbol table for read-only access.
bool add(const symbolt &symbol)
Add a new symbol to the symbol table.
The symbol table.
Definition: symbol_table.h:14
virtual std::pair< symbolt &, bool > insert(symbolt symbol) override
Author: Diffblue Ltd.
Symbol table entry.
Definition: symbol.h:28
irep_idt base_name
Base (non-scoped) name.
Definition: symbol.h:46
irep_idt module
Name of module the symbol belongs to.
Definition: symbol.h:43
bool is_static_lifetime
Definition: symbol.h:70
source_locationt location
Source code location of definition of symbol.
Definition: symbol.h:37
class symbol_exprt symbol_expr() const
Produces a symbol_exprt for a symbol.
Definition: symbol.cpp:121
typet type
Type of symbol.
Definition: symbol.h:31
irep_idt name
The unique identifier.
Definition: symbol.h:40
irep_idt mode
Language mode.
Definition: symbol.h:49
static exprt conditional_cast(const exprt &expr, const typet &type)
Definition: std_expr.h:2081
The type of an expression, extends irept.
Definition: type.h:29
bool has_prefix(const std::string &s, const std::string &prefix)
Definition: converter.cpp:13
#define CPROVER_PREFIX
symbolt & get_fresh_aux_symbol(const typet &type, const std::string &name_prefix, const std::string &basename_prefix, const source_locationt &source_location, const irep_idt &symbol_mode, const namespacet &ns, symbol_table_baset &symbol_table)
Installs a fresh-named symbol with respect to the given namespace ns with the requested name pattern ...
Fresh auxiliary symbol creation.
std::unique_ptr< generate_function_bodiest > generate_function_bodies_factory(const std::string &options, const c_object_factory_parameterst &object_factory_parameters, const symbol_tablet &symbol_table, message_handlert &message_handler)
Create the type that actually generates the functions.
void generate_function_bodies(const std::regex &functions_regex, const generate_function_bodiest &generate_function_body, goto_modelt &model, message_handlert &message_handler)
Generate function bodies with some default behavior: assert-false, assume-false, assert-false-assume-...
void goto_convert(const codet &code, symbol_table_baset &symbol_table, goto_programt &dest, message_handlert &message_handler, const irep_idt &mode)
Program Transformation.
Goto Programs with Functions.
Symbol Table + CFG.
const std::string & id2string(const irep_idt &d)
Definition: irep.h:44
API to expression classes for Pointers.
const pointer_typet & to_pointer_type(const typet &type)
Cast a typet to a pointer_typet.
Definition: pointer_expr.h:93
void remove_skip(goto_programt &goto_program, goto_programt::targett begin, goto_programt::targett end)
remove unnecessary skip statements
Definition: remove_skip.cpp:87
Program Transformation.
#define CHECK_RETURN(CONDITION)
Definition: invariant.h:495
#define PRECONDITION(CONDITION)
Definition: invariant.h:463
const symbol_exprt & to_symbol_expr(const exprt &expr)
Cast an exprt to a symbol_exprt.
Definition: std_expr.h:272
const code_typet & to_code_type(const typet &type)
Cast a typet to a code_typet.
Definition: std_types.h:788
std::optional< std::size_t > string2optional_size_t(const std::string &str, int base)
Convert string to size_t similar to the stoul or stoull functions, return nullopt when the conversion...
Definition: string2int.cpp:71
std::string to_string(const string_not_contains_constraintt &expr)
Used for debug printing.
void split_string(const std::string &s, char delim, std::vector< std::string > &result, bool strip, bool remove_empty)