CBMC
add_failed_symbols.h
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1 /*******************************************************************\
2 
3 Module: Pointer Dereferencing
4 
5 Author: Daniel Kroening, kroening@kroening.com
6 
7 \*******************************************************************/
8 
11 
12 #ifndef CPROVER_POINTER_ANALYSIS_ADD_FAILED_SYMBOLS_H
13 #define CPROVER_POINTER_ANALYSIS_ADD_FAILED_SYMBOLS_H
14 
15 #include <util/expr.h>
16 
17 class symbol_table_baset;
18 class symbolt;
19 class namespacet;
20 class symbol_exprt;
21 
22 void add_failed_symbols(symbol_table_baset &symbol_table);
23 
25  const symbolt &symbol, symbol_table_baset &symbol_table);
26 
27 irep_idt failed_symbol_id(const irep_idt &identifier);
28 
34 std::optional<symbol_exprt>
35 get_failed_symbol(const symbol_exprt &expr, const namespacet &ns);
36 
38 inline bool is_failed_symbol(const exprt &expr)
39 {
40  return expr.type().get_bool(ID_C_is_failed_symbol);
41 }
42 
43 #endif // CPROVER_POINTER_ANALYSIS_ADD_FAILED_SYMBOLS_H
void add_failed_symbol_if_needed(const symbolt &symbol, symbol_table_baset &symbol_table)
Create a failed-dereference symbol for the given base symbol if it is pointer-typed,...
bool is_failed_symbol(const exprt &expr)
Return true if, and only if, expr is the result of failed dereferencing.
irep_idt failed_symbol_id(const irep_idt &identifier)
Get the name of the special symbol used to denote an unknown referee pointed to by a given pointer-ty...
void add_failed_symbols(symbol_table_baset &symbol_table)
Create a failed-dereference symbol for all symbols in the given table that need one (i....
std::optional< symbol_exprt > get_failed_symbol(const symbol_exprt &expr, const namespacet &ns)
Get the failed-dereference symbol for the given symbol.
dstringt has one field, an unsigned integer no which is an index into a static table of strings.
Definition: dstring.h:38
Base class for all expressions.
Definition: expr.h:56
typet & type()
Return the type of the expression.
Definition: expr.h:84
bool get_bool(const irep_idt &name) const
Definition: irep.cpp:57
A namespacet is essentially one or two symbol tables bound together, to allow for symbol lookups in t...
Definition: namespace.h:94
Expression to hold a symbol (variable)
Definition: std_expr.h:131
The symbol table base class interface.
Symbol table entry.
Definition: symbol.h:28