Valgrind

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What Valgrind is

Valgrind is a free instrumentation framework for building tools that find memory and threading problems and profile programs. Its tool suite includes Memcheck for invalid memory access, uninitialized values, leaks, bad frees, and overlapping memory copies. Cachegrind reports cache misses, memory references, and instructions by source line, while Callgrind adds call-graph information. Helgrind identifies data races, and DRD detects errors in programs using POSIX threading primitives. Massif, DHAT, and experimental and testing tools are also included. Developers can build additional instrumentation tools on its dynamic binary instrumentation framework. The project describes Valgrind as suitable for programs in any language, although its tools are largely aimed at C and C++. It is listed for Android, Linux, and macOS. The project distributes source code as a tarball, not binaries or RPMs; users who do not want to compile can obtain it through their operating system’s download site. Valgrind is available under GPL version 3. Programs run significantly slower under it, with slowdowns ranging from 5–100 times depending on the tool.

Who it suits

Valgrind suits developers who need to analyze programs for memory or threading errors, or profile performance. The project says its tools are largely aimed at C and C++ and are suitable for projects from personal software to large systems.

What it does well

Memcheck detects leaks and invalid memory access.
Cachegrind reports cache and instruction data by source line.
Helgrind finds data races.
Developers can build additional instrumentation tools.
Available under GPL version 3.

What to know first

The project distributes source code, not binaries or RPMs.
Programs can run 5–100 times slower.
Memcheck does not bounds-check global or stack arrays.
Volunteer mailing-list answers are not guaranteed.

Limits

The free Valgrind plan is GPL version 3 and compiled from source. Programs run significantly slower and use more memory; the stated slowdown ranges from 5–100 times depending on the tool. Memcheck does not perform bounds checking on global or stack arrays.

Plans

Plan	Billed and limits	Price
Valgrind	Not charged · GPL version 3 · Compiled from source · Programs run significantly slower and use more memory	Free

As valgrind.org lists them, read 9 Oct 2026. The maker's own page has the final word.

Getting started

Visit valgrind.org and open the current release page.
Download the source code tarball and compile it, or use your operating system’s download site if you do not want to compile.
Choose a tool from the distribution, such as Memcheck, Cachegrind, Callgrind, Helgrind, or DRD.
Consult the documentation or the valgrind-users mailing list for help.

Verdict

Valgrind provides a broad set of free tools for memory checks, thread analysis, and profiling. Be prepared to compile from source or use an operating-system download site, and account for substantial slowdowns during analysis.

Questions

Does Valgrind cost anything?

Valgrind is free and open source under the GNU General Public License version 3.

Which platforms are listed?

The listed platforms are Android, Linux, and macOS.

Does Valgrind include CPU and memory profiling?

Yes. Cachegrind and Callgrind provide CPU-related profiling, and the distribution includes memory analysis tools such as Memcheck, Massif, and DHAT.

Can developers add their own tools?

Yes. Developers can build new instrumentation tools on Valgrind’s dynamic binary instrumentation framework.

How do I get Valgrind?

The current release page offers source code as a tarball, not binaries or RPMs. Users who do not want to compile can use their operating system’s download site.

What support is available?

Users can consult the documentation and the valgrind-users mailing list, but answers from unpaid volunteers are not guaranteed. The project also lists commercial support consultants, who are not rated or endorsed by Valgrind.org or its members.

Facts from Valgrind's own pages

Commercial support: The project lists consultants offering commercial support and says they are not rated or endorsed by Valgrind.org or its members. · valgrind.org, 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. · valgrind.org, 9 Oct 2026
Extensibility: Developers can build new instrumentation tools on Valgrind’s dynamic binary instrumentation framework. · valgrind.org, 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. · valgrind.org, 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++. · valgrind.org, 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. · valgrind.org, 9 Oct 2026
Memcheck limits: Memcheck does not perform bounds checking on global or stack arrays. · valgrind.org, 9 Oct 2026
Memory checking: Memcheck detects invalid memory access, uninitialized values, memory leaks, bad frees and overlapping memory copies. · valgrind.org, 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. · valgrind.org, 9 Oct 2026
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. · valgrind.org, 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. · valgrind.org, 9 Oct 2026
Purpose: Valgrind is an instrumentation framework for building dynamic analysis tools that detect memory and threading bugs and profile programs. · valgrind.org, 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. · valgrind.org, 9 Oct 2026
Thread analysis: Helgrind finds data races in multithreaded programs, and DRD detects errors in programs using POSIX threading primitives. · valgrind.org, 9 Oct 2026
Tool suite: The distribution includes Memcheck, Cachegrind, Callgrind, Massif, Helgrind, DRD and DHAT, plus experimental and testing tools. · valgrind.org, 9 Oct 2026

Where Valgrind stands on Freedom251

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