Splint (programming tool)

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Splint
Developer(s)The Splint Developers
Stable release
3.1.2 / July 12, 2007; 11 years ago (2007-07-12)
Operating systemCross-platform
TypeStatic code analysis
LicenseGPL
Websitehttp://www.splint.org

Splint, short for Secure Programming Lint, is a programming tool for statically checking C programs for security vulnerabilities and coding mistakes. Formerly called LCLint, it is a modern version of the Unix lint tool.

Splint has the ability to interpret special annotations to the source code, which gives it stronger checking than is possible just by looking at the source alone. Splint is used by gpsd as part of an effort to design for zero defects.[1]

Splint is free software released under the terms of the GNU General Public License.

Development activity on Splint stopped in 2010. According to the CVS at SourceForge, as of September 2012 the most recent change in the repository was in November 2010.[2] As of June 2018, the git repository at github concurs, showing no changes since November 2010.[3]

Example[edit]

#include <stdio.h>
int main()
{
    char c;
    while (c != 'x');
    {
        c = getchar();
        if (c = 'x')
            return 0;
        switch (c) {
        case '\n':
        case '\r':
            printf("Newline\n");
        default:
            printf("%c",c);
        }
    }
    return 0;
}

Splint's output:

Variable c used before definition
Suspected infinite loop. No value used in loop test (c) is modified by test or loop body.
Assignment of int to char: c = getchar()
Test expression for if is assignment expression: c = 'x'
Test expression for if not boolean, type char: c = 'x'
Fall through case (no preceding break)

Fixed source:

#include <stdio.h>
int main()
{
    int c = 0;  // Added an initial assignment definition.

    while (c != 'x') {
        c = getchar();  // Corrected type of c to int
        if (c == 'x') // Fixed the assignment error to make it a comparison operator.
            return 0;
        switch (c) {
        case '\n':
        case '\r':
            printf("Newline\n");
            break;  // Added break statement to prevent fall-through.
        default:
            printf("%c",c);
            break;  //Added break statement to default catch, out of good practice.
        }
    }
    return 0;
}

See also[edit]

References[edit]

  1. ^ Raymond (2012). Brown, Amy; Wison, Greg, eds. The Architecture of Open Source Applications, Volume II (Eric ed.). Lulu. ISBN 9781105571817.
  2. ^ "Splint project CVS statistics". Retrieved 2012-09-11.
  3. ^ "Splint project git history". Retrieved 2012-06-06.

External links[edit]