Replace Java Nondet expressions. More...

#include "replace_java_nondet.h"
#include <goto-programs/goto_model.h>
#include <goto-programs/remove_skip.h>
#include <util/std_code.h>
#include <algorithm>
#include <regex>

Include dependency graph for replace_java_nondet.cpp:

Go to the source code of this file.

Classes
class	nondet_instruction_infot
	Holds information about any discovered nondet methods, with extreme type- safety. More...

Functions
static nondet_instruction_infot	is_nondet_returning_object (const code_function_callt &function_call)
	Checks whether the function call is one of our nondet library functions. More...

static nondet_instruction_infot	get_nondet_instruction_info (const goto_programt::const_targett &instr)
	Check whether the instruction is a function call which matches one of the recognised nondet library methods, and return some information about it. More...

static bool	is_symbol_with_id (const exprt &expr, const irep_idt &identifier)
	Return whether the expression is a symbol with the specified identifier. More...

static bool	is_typecast_with_id (const exprt &expr, const irep_idt &identifier)
	Return whether the expression is a typecast with the specified identifier. More...

static bool	is_assignment_from (const goto_programt::instructiont &instr, const irep_idt &identifier)
	Return whether the instruction is an assignment, and the rhs is a symbol or typecast expression with the specified identifier. More...

static bool	is_return_with_variable (const goto_programt::instructiont &instr, const irep_idt &identifier)
	Return whether the instruction is a return, and the rhs is a symbol or typecast expression with the specified identifier. More...

static goto_programt::targett	check_and_replace_target (goto_programt &goto_program, const goto_programt::targett &target)
	Given an iterator into a list of instructions, modify the list to replace 'nondet' library functions with CBMC-native nondet expressions, and return an iterator to the next instruction to check. More...

static void	replace_java_nondet (goto_programt &goto_program)
	Checks each instruction in the goto program to see whether it is a method returning nondet. More...

void	replace_java_nondet (goto_model_functiont &function)
	Replace calls to nondet library functions with an internal nondet representation in a single function. More...

void	replace_java_nondet (goto_functionst &goto_functions)

void	replace_java_nondet (goto_modelt &goto_model)
	Replace calls to nondet library functions with an internal nondet representation. More...

Detailed Description

Replace Java Nondet expressions.

Definition in file replace_java_nondet.cpp.

Function Documentation

◆ check_and_replace_target()

static goto_programt::targett check_and_replace_target	(	goto_programt &	goto_program,
		const goto_programt::targett &	target
	)

static

Given an iterator into a list of instructions, modify the list to replace 'nondet' library functions with CBMC-native nondet expressions, and return an iterator to the next instruction to check.

It's important to note that this method also deals with the fact that in the GOTO program it assigns function return values to temporary variables, performs validation and then assigns the value into the actual variable.

Example:

return_tmp0=org.cprover.CProver.nondetWithoutNull:()Ljava/lang/Object;(); ... Various validations of type and value here. obj = (<type-of-obj>)return_tmp0;

We're going to replace all of these lines with obj = NONDET(<type-of-obj>)

In the situation of a direct return, the end result should be: return NONDET(<type-of-obj>)

Parameters

goto_program	The goto program to modify.
target	A single step of the goto program which may be erased and replaced.

Returns: The next instruction to process, probably with this function.

Definition at line 196 of file replace_java_nondet.cpp.

◆ get_nondet_instruction_info()

static nondet_instruction_infot get_nondet_instruction_info ( const goto_programt::const_targett & instr )

static

Check whether the instruction is a function call which matches one of the recognised nondet library methods, and return some information about it.

Parameters

instr A goto-program instruction to check.

Returns: A structure detailing the properties of the nondet method.

Definition at line 90 of file replace_java_nondet.cpp.

◆ is_assignment_from()

static bool is_assignment_from	(	const goto_programt::instructiont &	instr,
		const irep_idt &	identifier
	)

static

Return whether the instruction is an assignment, and the rhs is a symbol or typecast expression with the specified identifier.

Parameters

instr	A goto program instruction.
identifier	Some identifier.

Returns: True if the expression is a typecast with one operand, and the typecast's identifier matches the specified identifier.

Definition at line 141 of file replace_java_nondet.cpp.

◆ is_nondet_returning_object()

static nondet_instruction_infot is_nondet_returning_object ( const code_function_callt & function_call )

static

Checks whether the function call is one of our nondet library functions.

Parameters

function_call The function call declaration to check.

Returns: A structure detailing whether the function call appears to be one of our nondet library methods, and if so, whether or not it allows null results.

Definition at line 68 of file replace_java_nondet.cpp.

◆ is_return_with_variable()

static bool is_return_with_variable	(	const goto_programt::instructiont &	instr,
		const irep_idt &	identifier
	)

static

Return whether the instruction is a return, and the rhs is a symbol or typecast expression with the specified identifier.

Parameters

instr	A goto program instruction.
identifier	Some identifier.

Returns: True if the expression is a typecast with one operand, and the typecast's identifier matches the specified identifier.

Definition at line 161 of file replace_java_nondet.cpp.

◆ is_symbol_with_id()

static bool is_symbol_with_id	(	const exprt &	expr,
		const irep_idt &	identifier
	)

static

Return whether the expression is a symbol with the specified identifier.

Parameters

expr	The expression which may be a symbol.
identifier	Some identifier.

Returns: True if the expression is a symbol with the specified identifier.

Definition at line 108 of file replace_java_nondet.cpp.

◆ is_typecast_with_id()

static bool is_typecast_with_id	(	const exprt &	expr,
		const irep_idt &	identifier
	)

static

Return whether the expression is a typecast with the specified identifier.

Parameters

expr	The expression which may be a typecast.
identifier	Some identifier.

Returns: True if the expression is a typecast with one operand, and the typecast's identifier matches the specified identifier.

Definition at line 119 of file replace_java_nondet.cpp.

◆ replace_java_nondet() [1/4]

void replace_java_nondet ( goto_functionst & goto_functions )

Definition at line 331 of file replace_java_nondet.cpp.

◆ replace_java_nondet() [2/4]

void replace_java_nondet ( goto_model_functiont & function )

Replace calls to nondet library functions with an internal nondet representation in a single function.

Parameters

function The goto program to modify.

Definition at line 323 of file replace_java_nondet.cpp.

◆ replace_java_nondet() [3/4]

void replace_java_nondet ( goto_modelt & goto_model )

Replace calls to nondet library functions with an internal nondet representation.

Parameters

goto_model The goto program to modify.

Definition at line 344 of file replace_java_nondet.cpp.

◆ replace_java_nondet() [4/4]

static void replace_java_nondet ( goto_programt & goto_program )

static

Checks each instruction in the goto program to see whether it is a method returning nondet.

If it is, replaces the function call with an irep representing a nondet side effect with an appropriate type.

Parameters

goto_program The goto program to modify.

Definition at line 309 of file replace_java_nondet.cpp.

Classes

Functions

Detailed Description

Function Documentation

◆ check_and_replace_target()

◆ get_nondet_instruction_info()

◆ is_assignment_from()

◆ is_nondet_returning_object()

◆ is_return_with_variable()

◆ is_symbol_with_id()

◆ is_typecast_with_id()

◆ replace_java_nondet() [1/4]

◆ replace_java_nondet() [2/4]

◆ replace_java_nondet() [3/4]

◆ replace_java_nondet() [4/4]