Page History

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In this example, p2 is assigned the value returned by bar(), but that value is never used. Note this example assumes that foo() and bar() return valid pointers. (See DCL30-C. Declare objects with appropriate storage durations.)

Code Block

bgColor	#FFCCCC
lang	c

int *p1, *p2;
p1 = foo();
p2 = bar();

if (baz()) {
  return p1;
}
else {
  p2 = p1;
}
return p2;

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Tool

Version

Checker

Description

Include Page

	LDRA_V
	LDRA_V

1 D
70 D
94 D
15 D

Fully implemented.

Include Page

	Coverity_V
	Coverity_V

UNUSED_VALUE

Finds variables that are assigned pointer values returned from a function call but never used.

Include Page

	Klocwork_V
	Klocwork_V

Can detect violations of this rule with a number of checkers.

Include Page

	PRQA_V
	PRQA_V

Fully implemented

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ISO/IEC TR 24772 "BRS Leveraging human experience," "KOA Likely incorrect expressions," "XYQ Dead and deactivated code," and "XYR Unused variable"

Sources

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