Checker

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GNU Checker

https://www.gnu.org/software/checker/
Finds memory errors at runtime.

Checker is a debugging tool suite which is used to find memory errors at runtime.

'Checker' can help find bugs that standard tools cannot always find. The best example is memory leaks. A memory leak is a zone of memory, allocated with malloc that is not used anymore. So the memory allocated is lost. This means you program needs more memory and runs slower, since your OS might have to start swapping. It detects bad memory accesses such as: reading uninitialized memory, writing in a freed zone, writing or reading outside of a memory block, and using NULL pointers. This is particularly useful for big programs with many functions. Checker maintains bitmaps to keep track of the status of each byte of memory. The status can be writable, readable, both, or none. When memory is allocated, the new memory becomes write-only: you are not allowed to read it because it has not been initialized. But when you you write to this new block, those bytes become readable and writable. When the block is freed, the bytes become unreadable and unwritable. Red zones are unreadable and unwritable memory, so that each access to a red zone produces a warning.

Documentation

https://cvs.savannah.nongnu.org/viewvc/checker/checker/doc/

Tips for new GNU maintainers

Selection from the FSF shop

Free as in Freedom 2.0, by Richard Stallman

Introduction to the Command Line



Helping the GNU Project and the Free Software Movement



If you have corrections to this entry or questions about it, please contact: mailto:maintainers@gnu.org




Download

https://alpha.gnu.org/gnu/checker/Checker-0.9.9.1.tar.gz

version 0.9.9.1 (stable)
released on 31 August 1998

Decommissioned

Yes

If you have time and interest in resurrecting this GNU package, please contact: mailto:maintainers@gnu.org


OpenPGP signature URL: https://alpha.gnu.org/gnu/checker/Checker-0.9.9.1.tar.gz.sig

User level

Advanced

https://my.fsf.org/donate/

Accepts cryptocurrency donations.

https://www.fsf.org/resources/service/

VCS Checkout

cvs -z3 -d:pserver:anonymous@cvs.savannah.nongnu.org:/sources/checker co checker

Categories

Related Projects





Licensing

License

Verified by

Verified on

Notes

Verified by

Bendikker

Verified on

1 January 2019

Verified by

Bendikker

Verified on

1 January 2019




Leaders and contributors

Resources and communication

AudienceResource typeURI
Savannah (Ref)https://savannah.nongnu.org/projects/checker/
VCS Repository Webviewhttps://cvs.savannah.nongnu.org/viewvc/checker/
Mailing Listhttps://lists.gnu.org/mailman/listinfo/gnu-system-discuss/
Downloadhttps://alpha.gnu.org/gnu/checker/
Generalhttps://savannah.gnu.org/people/


Software prerequisites

KindDescription
Source requirement GCC 2.8.1

This entry (in part or in whole) was last reviewed on 6 January 2019.



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"Savannah (Ref)" is not in the list (General, Help, Bug Tracking, Support, Developer) of allowed values for the "Resource audience" property.

















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The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.