IO.FILEDEREF : FILE* Dereference

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CodeSonar^® 9.2p0

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C and C++

IO.FILEDEREF : FILE* Dereference

Summary

A value of type FILE* is dereferenced.

Properties

Class Name

FILE* Dereference

Significance

style

Mnemonic

IO.FILEDEREF

Categories

MisraC2025	MisraC2025:22.5	A pointer to a FILE object shall not be dereferenced
MisraC2023	MisraC2023:22.5	A pointer to a FILE object shall not be dereferenced
Misra2012	Misra2012:22.5	A pointer to a FILE object shall not be dereferenced
TS17961	TS17961:5.12-filecpy	Copying a FILE object

Availability

Available for C and C++.

Enabling

Checks for this warning class are disabled by default, and require the unnormalized C ASTs for the project. To enable them, add the following WARNING_FILTER rule and RETAIN_UNNORMALIZED_C_AST specification to the project configuration file.

RETAIN_UNNORMALIZED_C_AST = Yes
WARNING_FILTER += allow class="FILE* Dereference"

Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

Example

#include <stdio.h>

typedef FILE * filestar;
typedef struct { FILE * fld; } mystruct;
FILE *fpfn(void);

void deref_filestar(FILE* plainparam,
                    filestar tdparam,
                    mystruct sparam)
{
    *plainparam;      /* 'FILE* Dereference' warning issued here */
    *tdparam;         /* 'FILE* Dereference' warning issued here */
    *(sparam.fld);    /* 'FILE* Dereference' warning issued here */
    *(fpfn());        /* 'FILE* Dereference' warning issued here */
}

Relevant Configuration File Parameters

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

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