Difference between revisions of "Checker"
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{{Entry | {{Entry | ||
|Name=GNU Checker | |Name=GNU Checker | ||
| − | |Short description=Finds memory errors at runtime | + | |Short description=Finds memory errors at runtime. |
| − | |Full description='''Checker''' | + | |Full description='''Checker''' is a debugging tool suite which is used to find memory errors at runtime. |
| − | This | + | '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. |
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|Homepage URL=https://www.gnu.org/software/checker/ | |Homepage URL=https://www.gnu.org/software/checker/ | ||
| − | |||
|Is High Priority Project=No | |Is High Priority Project=No | ||
| − | | | + | |VCS checkout command=cvs -z3 -d:pserver:anonymous@cvs.savannah.nongnu.org:/sources/checker co checker |
| − | + | |Documentation note=https://cvs.savannah.nongnu.org/viewvc/checker/checker/doc/ | |
| − | |Documentation note= | + | |
| − | |Decommissioned | + | ---- |
| − | | | + | [https://www.gnu.org/software/maintainer-tips.html Tips for new GNU maintainers] |
| − | + | ||
| − | | | + | |
| − | |Related projects=valgrind | + | |Decommissioned or Obsolete=Yes |
| + | |Decommissioned details=If you have time and interest in resurrecting this GNU package, please contact: mailto:maintainers@gnu.org | ||
| + | |Donate=https://my.fsf.org/donate/ | ||
| + | |Related projects=valgrind,halloc,memtest86,memwatch | ||
|Keywords=memory,malloc,checker,runtime,memory leak,checking,errors | |Keywords=memory,malloc,checker,runtime,memory leak,checking,errors | ||
|Version identifier=0.9.9.1 | |Version identifier=0.9.9.1 | ||
| − | |Version date=1998/08/ | + | |Version date=1998/08/31 |
| − | |Version status= | + | |Version status=stable |
| − | |Version download= | + | |Version download=https://alpha.gnu.org/gnu/checker/Checker-0.9.9.1.tar.gz |
| − | |||
| − | |||
|Last review by=Bendikker | |Last review by=Bendikker | ||
| − | |Last review date= | + | |Last review date=2019/01/06 |
| − | |Submitted by= | + | |Submitted by=Database conversion |
|Submitted date=2011-04-01 | |Submitted date=2011-04-01 | ||
| + | |User level=advanced | ||
| + | |Component programs=checkergcc | ||
| + | |Paid support=https://www.fsf.org/resources/service/ | ||
| + | |Accepts cryptocurrency donations=Yes | ||
| + | |OpenPGP signature=https://alpha.gnu.org/gnu/checker/Checker-0.9.9.1.tar.gz.sig | ||
| + | |Test entry=No | ||
|Is GNU=No | |Is GNU=No | ||
| + | |GNU package identifier=checker | ||
| + | |Decommissioned/Obsolete=Yes | ||
|License verified date=2001-03-01 | |License verified date=2001-03-01 | ||
}} | }} | ||
{{Project license | {{Project license | ||
|License=GPLv2orlater | |License=GPLv2orlater | ||
| − | |License verified by= | + | |License verified by=Bendikker |
| − | |License verified date= | + | |License verified date=2019/01/01 |
}} | }} | ||
| − | {{ | + | {{Project license |
| − | | | + | |License=LGPLv2.1 |
| − | | | + | |License verified by=Bendikker |
| − | + | |License verified date=2019/01/01 | |
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| − | |||
| − | | | ||
}} | }} | ||
{{Resource | {{Resource | ||
| − | |Resource audience= | + | |Resource audience=Savannah (Ref) |
| − | |Resource URL=https:// | + | |Resource URL=https://savannah.nongnu.org/projects/checker/ |
}} | }} | ||
{{Resource | {{Resource | ||
| − | |Resource | + | |Resource kind=VCS Repository Webview |
| − | |Resource URL=https:// | + | |Resource URL=https://cvs.savannah.nongnu.org/viewvc/checker/ |
}} | }} | ||
{{Resource | {{Resource | ||
| − | |Resource | + | |Resource kind=Mailing List |
| − | |Resource URL=https:// | + | |Resource URL=https://lists.gnu.org/mailman/listinfo/gnu-system-discuss/ |
}} | }} | ||
{{Resource | {{Resource | ||
| − | + | |Resource kind=Download | |
| − | |Resource kind= | + | |Resource URL=https://alpha.gnu.org/gnu/checker/ |
| − | |Resource URL= | ||
}} | }} | ||
{{Resource | {{Resource | ||
| − | + | |Resource kind=General | |
| − | |Resource kind= | + | |Resource URL=https://savannah.gnu.org/people/ |
| − | |Resource URL= | ||
}} | }} | ||
{{Software category | {{Software category | ||
|Interface=command-line, library | |Interface=command-line, library | ||
| − | |Programming-language=C | + | |Programming-language=C, shell |
| + | |Runs-on=GNU/Linux | ||
|Software-development=debugging | |Software-development=debugging | ||
|Use=software-development | |Use=software-development | ||
}} | }} | ||
{{Software prerequisite | {{Software prerequisite | ||
| − | |Prerequisite kind= | + | |Prerequisite kind=Source requirement |
| − | |Prerequisite description=gcc 2.8.1 | + | |Prerequisite description=[[gcc| GCC]] 2.8.1 |
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}} | }} | ||
{{Featured}} | {{Featured}} | ||
Latest revision as of 15:55, 4 December 2020
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.
Licensing
License
Verified by
Verified on
Notes
Leaders and contributors
Resources and communication
| Audience | Resource type | URI |
|---|---|---|
| Savannah (Ref) | https://savannah.nongnu.org/projects/checker/ | |
| General | https://savannah.gnu.org/people/ | |
| Mailing List | https://lists.gnu.org/mailman/listinfo/gnu-system-discuss/ | |
| VCS Repository Webview | https://cvs.savannah.nongnu.org/viewvc/checker/ | |
| Download | https://alpha.gnu.org/gnu/checker/ |
Software prerequisites
| Kind | Description |
|---|---|
| Source requirement | GCC 2.8.1 |
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 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.