Valgrind is a GPL'd system for debugging and profiling x86-Linux programs.
With the tools that come with Valgrind, you can automatically detect many memory management and threading bugs, avoiding hours of frustrating bug-hunting, making your programs more stable. You can also perform detailed profiling to help speed up your programs.
The Valgrind distribution includes five tools: two memory error detectors, a thread error detector, a cache profiler and a heap profiler.
Several other tools have been built with Valgrind.
