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|Component programs||checkergcc +|
|Computer languages||C +|
|Full description||'checker' can help find bugs that standard … '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.decommissioned and is no longer developed.|
|Homepage URL||http://www.gnu.org/software/checker/ +|
|Is GNU||false +|
|Keywords||memory + , malloc + , checker + , runtime + , memory leak + , checking + , errors +|
|Last review by||Janet Casey +|
|Last review date||15 October 2009 +|
|License verified by||Janet Casey +|
|License verified date||1 March 2001 +|
|Prerequisite description||gcc 2.8.1 + , gcc +|
|Prerequisite kind||Required to use + , Required to build +|
|Real name||Ben Pfaff +|
|Related projects||Halloc + , Memtest86 + , Memwatch +|
|Revisiontimestamp||12 April 2011 09:04:03 +|
|Role||Maintainer + , Contributor +|
|Short description||Finds memory errors at runtime +|
|Submitted by||Database conversion +|
|Submitted date||1 April 2011 +|
|User level||none +|
|Version comment||0.9.9.1 stable released 2002-08-24|
|Version date||24 August 2002 +|
|Version identifier||0.9.9.1 +|
|Version status||stable +|
|Has queryThis property is a special property in this wiki.||Checker + , Checker + , Checker + , Checker + , Checker + , Checker + , Checker + , Checker + , Checker +|
|Modification dateThis property is a special property in this wiki.||13 September 2013 00:06:34 +|
|Page has default formThis property is a special property in this wiki.||Entry +|
|Has subobjectThis property is a special property in this wiki.||Checker + , Checker + , Checker + , Checker + , Checker +|
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|Halloc + , Memtest86 + , Memwatch +||Related projects|
|Checker + , Checker +||Software prerequisite of|
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.
The copyright and license notices on this page only apply to the text on this page. Any software described in this text has its own copyright notice and license, which can usually be found in the distribution itself.