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Devel::Peek contains functions which allows raw Perl
datatypes to be manipulated from a Perl script. This is
used by those who do XS programming to check that the data
they are sending from C to Perl looks as they think it
should look. The trick, then, is to know what the raw
datatype is supposed to look like when it gets to Perl.
This document offers some tips and hints to describe good
and bad raw data.
Devel::Peek supplies a Dump() function which can dump a
raw Perl datatype, and mstat("marker") function to report
on memory usage (if perl is compiled with corresponding
option). The function DeadCode() provides statistics on
the data "frozen" into inactive CV. Devel::Peek also
supplies SvREFCNT(), SvREFCNT_inc(), and SvREFCNT_dec()
which can query, increment, and decrement reference counts
on SVs.
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