Valgrind
Valgrind is a free, open-source framework for building tools that examine programs while they run.
What Valgrind is
Valgrind is a free, open-source framework for building tools that examine programs while they run. Its suite covers memory errors, threading issues, and profiling. Memcheck identifies invalid memory access, uninitialized values, leaks, bad frees, and overlapping memory copies, but does not check bounds on global or stack arrays. Cachegrind reports cache misses, memory references, and instructions by source line; Callgrind adds call-graph information. Helgrind looks for data races, while DRD detects errors in programs using POSIX threading primitives. The distribution also includes Massif, DHAT, and experimental and testing tools, and developers can build additional instrumentation tools. Valgrind is listed for Android, Linux, and macOS, with tools largely aimed at C and C++ despite the stated suitability for programs in any language. The project offers source as a tarball rather than binaries or RPMs. Its GPL version 3 software is free; programs run significantly slower under Valgrind, by 5–100 times depending on the tool.
Good
- Memcheck detects leaks and invalid memory access.
- Cachegrind reports cache and instruction data by source line.
- Helgrind and DRD target threading errors.
- Developers can build additional instrumentation tools.
- Documentation and a mailing list offer support channels.
Watch out
- Programs run 5–100 times slower, depending on the tool.
- Memcheck does not check global or stack array bounds.
- The project distributes source, not binaries or RPMs.
- Volunteer mailing-list answers are not guaranteed.
Who it suits
Valgrind suits developers working on programs in any language, especially those using C or C++, who need to inspect memory, threading, or performance. It may also fit projects ranging from personal software to large systems.
Verdict
Valgrind brings several memory, threading, and profiling tools together in a free framework. Account for its substantial slowdown and source compilation when deciding whether it fits your workflow.
Plans and prices
From Valgrind's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Valgrind | Free | GPL version 3 · Compiled from source · Programs run significantly slower and use more memory · Not charged |
The facts
Each one read from Valgrind's own pages, with the date it was checked.
What it does
- Commercial support
- The project lists consultants offering commercial support and says they are not rated or endorsed by Valgrind.org or its members.checked 9 Oct 2026
- Download
- The current release page offers source code as a tarball and says the project does not distribute binaries or RPMs; users who do not want to compile can use their OS distribution’s download site.checked 9 Oct 2026
- Extensibility
- Developers can build new instrumentation tools on Valgrind’s dynamic binary instrumentation framework.checked 9 Oct 2026
- Integrations
- The site lists front ends or IDE integrations for Valkyrie, KDevelop, Eclipse, Visual Studio Code, Neovim, CLion and Qt Creator, and says it does not test or track their usefulness.checked 9 Oct 2026
- Intended users
- The project describes Valgrind as suitable for programs in any language and for projects ranging from personal software to large systems, with tools largely aimed at C and C++.checked 9 Oct 2026
- License and security
- Valgrind is freely available under the GNU General Public License version 3; the pages reviewed do not state security certifications or compliance claims.checked 9 Oct 2026
- Memcheck limits
- Memcheck does not perform bounds checking on global or stack arrays.checked 9 Oct 2026
- Memory checking
- Memcheck detects invalid memory access, uninitialized values, memory leaks, bad frees and overlapping memory copies.checked 9 Oct 2026
- Performance limit
- The project says programs run significantly slower under Valgrind, with slowdown ranging from 5–100 times depending on the tool.checked 9 Oct 2026
- Profiling
- Cachegrind simulates CPU caches and reports cache misses, memory references and instructions by source line, while Callgrind adds call graph data.checked 9 Oct 2026
- Purpose
- Valgrind is an instrumentation framework for building dynamic analysis tools that detect memory and threading bugs and profile programs.checked 9 Oct 2026
- Support
- Users can seek help through documentation and the valgrind-users mailing list, but the project says answers from unpaid volunteers are not guaranteed.checked 9 Oct 2026
- Thread analysis
- Helgrind finds data races in multithreaded programs, and DRD detects errors in programs using POSIX threading primitives.checked 9 Oct 2026
- Tool suite
- The distribution includes Memcheck, Cachegrind, Callgrind, Massif, Helgrind, DRD and DHAT, plus experimental and testing tools.checked 9 Oct 2026
Where it runs
- Platforms
- Current supported targets include Linux, FreeBSD, Solaris, illumos, Darwin/macOS and Android on specified CPU architectures; Windows is not under consideration for an in-tree port.checked 9 Oct 2026
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