Introduction; An Overview Of Valgrind - Valgrind Software Quick Start Manual

1. Introduction

1.1. An Overview of Valgrind

Valgrind is an instrumentation framework for building dynamic analysis tools. It comes with a set of tools each of
which performs some kind of debugging, profiling, or similar task that helps you improve your programs. Valgrind's
architecture is modular, so new tools can be created easily and without disturbing the existing structure.
A number of useful tools are supplied as standard.
1. Memcheck is a memory error detector. It helps you make your programs, particularly those written in C and C++,
more correct.
2. Cachegrind is a cache and branch-prediction profiler. It helps you make your programs run faster.
3. Callgrind is a call-graph generating cache profiler. It has some overlap with Cachegrind, but also gathers some
information that Cachegrind does not.
4. Helgrind is a thread error detector. It helps you make your multi-threaded programs more correct.
5. DRD is also a thread error detector. It is similar to Helgrind but uses different analysis techniques and so may find
different problems.
6. Massif is a heap profiler. It helps you make your programs use less memory.
7. DHAT is a different kind of heap profiler. It helps you understand issues of block lifetimes, block utilisation, and
layout inefficiencies.
8. SGcheck is an experimental tool that can detect overruns of stack and global arrays.
complementary to that of Memcheck: SGcheck finds problems that Memcheck can't, and vice versa..
9. BBV is an experimental SimPoint basic block vector generator. It is useful to people doing computer architecture
research and development.
There are also a couple of minor tools that aren't useful to most users: Lackey is an example tool that illustrates
some instrumentation basics; and Nulgrind is the minimal Valgrind tool that does no analysis or instrumentation, and
is only useful for testing purposes.
Valgrind is closely tied to details of the CPU and operating system, and to a lesser extent, the compiler and basic C
libraries. Nonetheless, it supports a number of widely-used platforms, listed in full at http://www.valgrind.org/.
Valgrind is built via the standard Unix ./configure, make, make install process; full details are given in
the README file in the distribution.
Valgrind is licensed under the
you may wish to include in your code (eg. valgrind.h, memcheck.h, helgrind.h, etc.) are distributed under
a BSD-style license, so you may include them in your code without worrying about license conflicts.
the PThreads test cases, pth_ * .c, are taken from "Pthreads Programming" by Bradford Nichols, Dick Buttlar &
Jacqueline Proulx Farrell, ISBN 1-56592-115-1, published by O'Reilly & Associates, Inc.
If you contribute code to Valgrind, please ensure your contributions are licensed as "GPLv2, or (at your option) any
later version." This is so as to allow the possibility of easily upgrading the license to GPLv3 in future. If you want to
modify code in the VEX subdirectory, please also see the file VEX/HACKING.README in the distribution.
The GNU General Public License, version 2. The valgrind/ * .h headers that
Its functionality is
Some of
1