The single header file (valgrind.h) in this directory defines runtime
macros that determine whether the current process is running under
Valgrind.

This header file was taken from Valgrind source code (version 3.4.1,
available at http://valgrind.org/downloads/valgrind-3.4.1.tar.bz2, dated
28 Feb 2009). The file is covered under BSD license as described within
the file.