AutosarC++18_10-A5.2.5

An array or container shall not be accessed beyond its range

Required inputs: IR, StaticSemanticAnalysis

This check detects attempts to access an array outside of its bounds (array index too large or negative).

Possible Messages

Key	Text	Severity	Disabled
arithmetic_out_of_bounds	Pointer arithmetic on {node0} might create pointer outside array bounds of {name0}	None	False
out_of_bounds	Access into array is out of bounds	None	False
possible_indirect_out_of_bounds	Pointer-indirect access through {node0} might be out of bounds accessing {name0}	None	False
possible_out_of_bounds	Access into array might be out of bounds	None	False
undereferenced_arithmetic_out_of_bounds	Pointer arithmetic on {node0} might create pointer one past the end of {name0} (but not dereferenced)	None	False
undereferenced_out_of_bounds	Access is one past the end of the array (but not dereferenced)	None	False
undereferenced_possible_indirect_out_of_bounds	Pointer-indirect access through {node0} might be one past the end accessing {name0} (but not dereferenced)	None	False
undereferenced_possible_out_of_bounds	Access might be one past the end of the array (but not dereferenced)	None	False

Options

• This rule shares the following common options: exclude_in_macros, exclude_messages_in_system_headers, excludes, extend_exclude_to_macro_invocations, includes, justification_checker, languages, post_processing, provider, report_at, severity

• The following places define options that affect this rule: Stylechecks, Analysis-GlobalOptions

abstract_interpretation_out_of_bounds

abstract_interpretation_out_of_bounds : bool = False

Use additional "symbolic expression analysis" as postprocessing step. This can remove false positives, but might require more time. Option is automatically active if option StaticSemanticAnalysis/performance.general.enhanced_analysis is active.

 

exclude_very_high_indices

exclude_very_high_indices : bool = True

Enables heuristic to detect false positives: When index used for array access is very high in comparison to the array's size, assume false positive.

 

report_unbounded_arrays

report_unbounded_arrays : bool = False

If true, accesses into arrays with unknown bound are reported as being potentially outside the allowed range. This affects arrays like extern char buf[];.

 

report_undereferenced_one_past_the_end

report_undereferenced_one_past_the_end : bool = False

If true, report accesses one past the end of an array even if there is no dereference of the resulting pointer.

 

report_unknown_index

report_unknown_index : bool = False

If false, do not report possible out-of-bound findings for which the analysis was not able to infer any restricting information about the array index (this can lead to excluding both false positives and true findings).