$ strace -e execve -s 200 perl -le '$/ = "\0"; open my $fh, "/proc/$$/cmdline"; print for <$fh>'
execve("/usr/local/bin/perl", ["perl", "-le", "$/ = \"\\0\"; open my $fh, \"/proc/$$/cmdline\"; print for <$fh>"], [/* 71 vars */]) = 0