Provides a strace/truss-like runtime call monitor for Perl applications. Note that, while strace/truss only dumps system calls, Devel::STrace dumps all calls to Perl subs on the application's stack. Also note that Devel::STrace cannot trace non-Perl calls (e.g., calls inside XS/C modules), so an additional external strace/truss monitor may be needed to fully diagnose a misbehaving Perl script. WWW: http://search.cpan.org/dist/Devel-STrace/