MISC.CPE : Copy-Paste Error

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CodeSonar^® 9.2p0

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CodeSecure Inc

C and C++

Ada

Java

Binaries

MISC.CPE : Copy-Paste Error

Summary

Two code regions are structurally highly similar but not identical.

The purpose of this check is to identify cases where code has been copied and pasted into a new context, but then adjusted to the new context in a way that does not preserve semantics. For example, variables may have have been renamed but one or more occurrences did not receive the correct new name.

To avoid issuing large numbers of spurious warnings, CodeSonar is tuned to report only cases where the two code regions are reasonably complex.

Properties

Class Name

Copy-Paste Error

Significance

reliability

Mnemonic

MISC.CPE

Example

int MISC_CPE(int a, int b, int c) {
    int x = 0;
    int y = 0;
        
    if (a > 5){
        x = x + a;
        y = y + a;
    }

    if (b > 5){
        x = x + b;
        y = y + a;  /* "Copy-Paste Error" warning issued here:
                     * CodeSonar suspects that this was copy-pasted from the first IF statement
                     * and then then some - but not all - occurrences of variable a changed to b   */
    }

    if (c > 5){
        x = x + c;
        y = y + c;               /* ok  */
    }

    return x+y;
}

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.

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