They just contain a POST_MEM_WRITE macro for each output argument.
+1. Running regression tests
+
+In order to run all of the regression tests you will need to install
+the following packages
+gdb
+gsed
+
+In addition to running "make" you will need to run
+"make check" to build the regression test exectutables
+and "make regtest". Again, more details can be seen in
+README_DEVELOPERS.
+
+If you want to run the 'nightly' script (see nightly/README.txt)
+you will need to install coreutils and modify the
+nightly/conf/freebsd.* files. The default configuration
+sends an e-mail to the valgrind-testresults mailing list.
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