Mass Deface
.
If the C is included, it must be a numeral I; the value is
dumped only I levels deep, as if the C option had been
temporarily set to I.
=item V [pkg [vars]]
X
Display all (or some) variables in package (defaulting to C)
using a data pretty-printer (hashes show their keys and values so
you see what's what, control characters are made printable, etc.).
Make sure you don't put the type specifier (like C<$>) there, just
the symbol names, like this:
V DB filename line
Use C<~pattern> and C for positive and negative regexes.
This is similar to calling the C command on each applicable var.
=item X [vars]
X
Same as C.
=item y [level [vars]]
X
Display all (or some) lexical variables (mnemonic: C variables)
in the current scope or I scopes higher. You can limit the
variables that you see with I which works exactly as it does
for the C and C commands. Requires the C module
version 0.08 or higher; will warn if this isn't installed. Output
is pretty-printed in the same style as for C and the format is
controlled by the same options.
=item T
X X X
Produce a stack backtrace. See below for details on its output.
=item s [expr]
X X
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.
=item n [expr]
X
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.
=item r
X
Continue until the return from the current subroutine.
Dump the return value if the C option is set (default).
=item
Repeat last C or C command.
=item c [line|sub]
X
Continue, optionally inserting a one-time-only breakpoint
at the specified line or subroutine.
=item l
X
List next window of lines.
=item l min+incr
List C lines starting at C.
=item l min-max
List lines C through C. C is synonymous to C<->.
=item l line
List a single line.
=item l subname
List first window of lines from subroutine. I may
be a variable that contains a code reference.
=item -
X
List previous window of lines.
=item v [line]
X
View a few lines of code around the current line.
=item .
X
Return the internal debugger pointer to the line last
executed, and print out that line.
=item f filename
X
Switch to viewing a different file or C statement. If I
is not a full pathname found in the values of %INC, it is considered
a regex.
Ced strings (when accessible) are considered to be filenames:
C and C access the body of the 7th Ced string
(in the order of execution). The bodies of the currently executed C
and of Ced strings that define subroutines are saved and thus
accessible.
=item /pattern/
Search forwards for pattern (a Perl regex); final / is optional.
The search is case-insensitive by default.
=item ?pattern?
Search backwards for pattern; final ? is optional.
The search is case-insensitive by default.
=item L [abw]
X
List (default all) actions, breakpoints and watch expressions
=item S [[!]regex]
X
List subroutine names [not] matching the regex.
=item t [n]
X
Toggle trace mode (see also the C option).
Optional argument is the maximum number of levels to trace below
the current one; anything deeper than that will be silent.
=item t [n] expr
X
Trace through execution of C.
Optional first argument is the maximum number of levels to trace below
the current one; anything deeper than that will be silent.
See L for examples.
=item b
X
X
Sets breakpoint on current line
=item b [line] [condition]
X
X
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 C:
b 237 $x > 30
b 237 ++$count237 < 11
b 33 /pattern/i
If the line number is C<.>, sets a breakpoint on the current line:
b . $n > 100
=item b [file]:[line] [condition]
X
X
Set a breakpoint before the given line in a (possibly different) file. 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 C:
b lib/MyModule.pm:237 $x > 30
b /usr/lib/perl5/site_perl/CGI.pm:100 ++$count100 < 11
=item b subname [condition]
X
X
Set a breakpoint before the first line of the named subroutine. I may
be a variable containing a code reference (in this case I
is not supported).
=item b postpone subname [condition]
X
X
Set a breakpoint at first line of subroutine after it is compiled.
=item b load filename
X
X
Set a breakpoint before the first executed line of the I,
which should be a full pathname found amongst the %INC values.
=item b compile subname
X
X
Sets a breakpoint before the first statement executed after the specified
subroutine is compiled.
=item B line
X
X
Delete a breakpoint from the specified I.
=item B *
X
X
Delete all installed breakpoints.
=item disable [file]:[line]
X
X
X
Disable the breakpoint so it won't stop the execution of the program.
Breakpoints are enabled by default and can be re-enabled using the C
command.
=item disable [line]
X
X
X
Disable the breakpoint so it won't stop the execution of the program.
Breakpoints are enabled by default and can be re-enabled using the C
command.
This is done for a breakpoint in the current file.
=item enable [file]:[line]
X
X
X
Enable the breakpoint so it will stop the execution of the program.
=item enable [line]
X
X
X
Enable the breakpoint so it will stop the execution of the program.
This is done for a breakpoint in the current file.
=item a [line] command
X
Set an action to be done before the line is executed. If I is
omitted, set an action on the line about to be executed.
The sequence of steps taken by the debugger is
1. check for a breakpoint at this line
2. print the line if necessary (tracing)
3. do any actions associated with that line
4. prompt user if at a breakpoint or in single-step
5. evaluate line
For example, this will print out $foo every time line
53 is passed:
a 53 print "DB FOUND $foo\n"
=item A line
X
Delete an action from the specified line.
=item A *
X
Delete all installed actions.
=item w expr
X
Add a global watch-expression. Whenever a watched global changes the
debugger will stop and display the old and new values.
=item W expr
X
Delete watch-expression
=item W *
X
Delete all watch-expressions.
=item o
X
Display all options.
=item o booloption ...
X
Set each listed Boolean option to the value C<1>.
=item o anyoption? ...
X
Print out the value of one or more options.
=item o option=value ...
X
Set the value of one or more options. If the value has internal
whitespace, it should be quoted. For example, you could set C to call B with those specific options.
You may use either single or double quotes, but if you do, you must
escape any embedded instances of same sort of quote you began with,
as well as any escaping any escapes that immediately precede that
quote but which are not meant to escape the quote itself. In other
words, you follow single-quoting rules irrespective of the quote;
eg: C or C.
For historical reasons, the C<=value> is optional, but defaults to
1 only where it is safe to do so--that is, mostly for Boolean
options. It is always better to assign a specific value using C<=>.
The C