在控制台输入perldoc perldebug即可如何得到如何调试perl程序的文档。
其中重要的命令如下：
particular,because this is just Perl's own "print"
function,this means that nested data structures and objects
are not dumped,unlike with the "x" command.
x [maxdepth] expr
Evaluates its expression in list context and dumps out the
result in a pretty-printed fashion.
T Produce a stack backtrace. See below for details on its
output.
s [expr] Single step. Executes until the beginning of another
statement,descending into subroutine calls. If an
expression is supplied that includes function calls,it too
will be single-stepped.
n [expr] Next. Executes over subroutine calls,until the beginning of
the next statement. If an expression is supplied that
includes function calls,those functions will be executed
with stops before each statement.
r Continue until the return from the current subroutine. Dump
the return value if the "PrintRet" option is set (default).
<CR> Repeat last "n" or "s" command.
L [abw] List (default all) actions,breakpoints and watch
expressions
l List next window of lines.
l line List a single line.
l subname List first window of lines from subroutine. *subname* may be
a variable that contains a code reference.
b Sets breakpoint on current line
b [line] [condition]
Set a breakpoint before the given line. If a condition is
specified,it's evaluated each time the statement is
reached: a breakpoint is taken only if the condition is
true. Breakpoints may only be set on lines that begin an
executable statement. Conditions don't use "if":
b 237 $x > 30
b 237 ++$count237 < 11
b 33 /pattern/i
b subname [condition]
Set a breakpoint before the first line of the named
subroutine. *subname* may be a variable containing a code
reference (in this case *condition* is not supported).
c [line|sub]
Continue,optionally inserting a one-time-only breakpoint at
the specified line or subroutine.
q or ^D Quit. ("quit" doesn't work for this,unless you've made an
alias) This is the only supported way to exit the debugger,
though typing "exit" twice might work.
Set the "inhibit_exit" option to 0 if you want to be able to
step off the end the script. You may also need to set
$finished to 0 if you want to step through global
destruction.
R Restart the debugger by "exec()"ing a new session. We try to
maintain your history across this,but internal settings and
command-line options may be lost.
The following setting are currently preserved: history,
breakpoints,actions,debugger options,and the Perl
command-line options -w,-I,and -e.
w expr Add a global watch-expression. Whenever a watched global changes the debugger will stop and display the old and new values. W expr Delete watch-expression W * Delete all watch-expressions.