Valgrind is an award-winning suite of tools for debugging and profiling 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 speed up and reduce memory use of your programs.

The Valgrind distribution currently includes four tools:  a memory error
detector, a cache (time) profiler, a call-graph profiler, and a heap (space)
profiler.  It runs on the following platforms:  X86/Linux, AMD64/Linux,
PPC32/Linux, PPC64/Linux.