void tracemem(address, size_tnbytes) void tracemem(address, size_tnbytes, size_tdbytes)
The tracemem action takes a D expression as
its first argument, address, and a
constant as its second argument,
nbytes. The
tracemem action copies the memory from the
address specified by address into
the directed buffer for the length specified by
nbytes. If only two arguments are
provided, dtrace dumps the entire contents
of the buffer.
In the second format, the tracemem action
takes an additional, third argument,
dbytes, which is a D expression
that is computed dynamically. The result is used to limit the
number of bytes that are displayed. If the result is less than
zero or greater than nbytes, the
result is ignored and tracemem behaves as
though it is called by using the two-argument form. Otherwise,
dtrace dumps only the
dbytes bytes of the directed
buffer.