Difference between revisions of "Checker"

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(Created page with "{{Entry |Name=checker |Short description=Finds memory errors at runtime |Full description='checker' can help find bugs that standard tools cannot always find. The best example is...")
 
(* "The GNU 'checker' package has been decommissioned, as 'valgrind' does a better job and is being actively maintained.")
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|Name=checker
 
|Name=checker
 
|Short description=Finds memory errors at runtime
 
|Short description=Finds memory errors at runtime
|Full description='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. This project was a GNU package. It has since been decommissioned and is no longer developed.
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|Full description=* "The GNU checker package has been decommissioned, as valgrind does a better job and is being actively maintained."
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'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. This project was a GNU package. It has since been decommissioned and is no longer developed.
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|Homepage URL=http://www.gnu.org/software/checker/
 
|User level=none
 
|User level=none
|Status=Live
 
 
|Component programs=checkergcc
 
|Component programs=checkergcc
|Homepage URL=http://www.gnu.org/software/checker/
 
|VCS checkout command=
 
 
|Computer languages=C
 
|Computer languages=C
|Documentation note=
 
|Paid support=
 
|IRC help=
 
|IRC general=
 
|IRC development=
 
 
|Related projects=halloc,Memtest86,Memwatch
 
|Related projects=halloc,Memtest86,Memwatch
 
|Keywords=memory,malloc,checker,runtime,memory leak,checking,errors
 
|Keywords=memory,malloc,checker,runtime,memory leak,checking,errors
|Is GNU=n
 
|Last review by=Janet Casey
 
|Last review date=2009-10-15
 
|Submitted by=Database conversion
 
|Submitted date=2011-04-01
 
 
|Version identifier=0.9.9.1
 
|Version identifier=0.9.9.1
 
|Version date=2002-08-24
 
|Version date=2002-08-24
 
|Version status=stable
 
|Version status=stable
|Version download=
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|Version download=ftp://alpha.gnu.org/gnu/checker/Checker-0.9.9.1.tar.gz
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|Version comment=0.9.9.1 stable released 2002-08-24
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|Last review by=Alejandroindependiente
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|Last review date=2017/01/28
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|Submitted by=Database conversion
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|Submitted date=2011-04-01
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|Status=
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|Is GNU=Yes
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|GNU package identifier=checker
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|License verified date=2001-03-01
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}}
 +
{{Project license
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|License=GPLv2
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|License verified by=Janet Casey
 
|License verified date=2001-03-01
 
|License verified date=2001-03-01
|Version comment=0.9.9.1 stable released 2002-08-24
 
 
}}
 
}}
 
{{Person
 
{{Person
 +
|Real name=Ben Pfaff
 
|Role=Maintainer
 
|Role=Maintainer
|Real name=Ben Pfaff
 
|Email=
 
 
|Resource URL=
 
|Resource URL=
 
}}
 
}}
 
{{Person
 
{{Person
 +
|Real name=Ben Pfaff
 
|Role=Contributor
 
|Role=Contributor
|Real name=Ben Pfaff
 
|Email=
 
 
|Resource URL=
 
|Resource URL=
 
}}
 
}}
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|Software-development=debugging
 
|Software-development=debugging
 
|Use=software-development
 
|Use=software-development
}}
 
{{Project license
 
|License=GPLv2
 
|License verified by=Janet Casey
 
|License verified date=2001-03-01
 
 
}}
 
}}
 
{{Software prerequisite
 
{{Software prerequisite
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|Prerequisite description=gcc
 
|Prerequisite description=gcc
 
}}
 
}}
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{{Featured}}

Revision as of 17:17, 28 January 2017

Reviews: 0 ... further results.

[edit]

GNU Checker

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

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

This project was a GNU package. It has proved its great worth in the 1990 years but has since been decommissioned and is no longer developed.

This page has been left for the sake of posterity.

Documentation

Former user manual in texinfo format is provided.

"IRC general" IRC general channel
irc://irc:irc.gnu.org/gnu

Related Projects





Licensing

License

Verified by

Verified on

Notes

Verified by

Genium

Verified on

29 January 2017




Leaders and contributors

Contact(s)Role
Tristan Gingold Former maintainer
Ben Pfaff Contributor


Resources and communication

AudienceResource typeURI
DeveloperVCS Repository Webviewhttp://cvs.savannah.nongnu.org/viewvc/checker/
User & DeveloperDownloadftp://alpha.gnu.org/gnu/checker/
Savannah (Ref)https://savannah.nongnu.org/projects/checker
Python (Ref)https://pypi.org/project/checker
Ruby (Ref)https://rubygems.org/gems/checker


Software prerequisites

KindDescription
Required to usegcc 2.8.1
Required to buildgcc

This entry (in part or in whole) was last reviewed on 5 April 2018.



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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.