3 # Debugger for Perl 5.00x; perl5db.pl patch level:
5 $header = "perl5db.pl version $VERSION";
7 # It is crucial that there is no lexicals in scope of `eval ""' down below
9 # 'my' would make it visible from user code
10 # but so does local! --tchrist [... into @DB::res, not @res. IZ]
13 local $otrace = $trace;
14 local $osingle = $single;
16 { ($evalarg) = $evalarg =~ /(.*)/s; }
17 @res = eval "$usercontext $evalarg;\n"; # '\n' for nice recursive debug
23 local $saved[0]; # Preserve the old value of $@
28 } elsif ($onetimeDump) {
29 if ($onetimeDump eq 'dump') {
30 local $option{dumpDepth} = $onetimedumpDepth
31 if defined $onetimedumpDepth;
33 } elsif ($onetimeDump eq 'methods') {
40 # After this point it is safe to introduce lexicals
41 # However, one should not overdo it: leave as much control from outside as possible
43 # This file is automatically included if you do perl -d.
44 # It's probably not useful to include this yourself.
46 # Before venturing further into these twisty passages, it is
47 # wise to read the perldebguts man page or risk the ire of dragons.
49 # Perl supplies the values for %sub. It effectively inserts
50 # a &DB::DB(); in front of every place that can have a
51 # breakpoint. Instead of a subroutine call it calls &DB::sub with
52 # $DB::sub being the called subroutine. It also inserts a BEGIN
53 # {require 'perl5db.pl'} before the first line.
55 # After each `require'd file is compiled, but before it is executed, a
56 # call to DB::postponed($main::{'_<'.$filename}) is emulated. Here the
57 # $filename is the expanded name of the `require'd file (as found as
60 # Additional services from Perl interpreter:
62 # if caller() is called from the package DB, it provides some
65 # The array @{$main::{'_<'.$filename}} (herein called @dbline) is the
66 # line-by-line contents of $filename.
68 # The hash %{'_<'.$filename} (herein called %dbline) contains
69 # breakpoints and action (it is keyed by line number), and individual
70 # entries are settable (as opposed to the whole hash). Only true/false
71 # is important to the interpreter, though the values used by
72 # perl5db.pl have the form "$break_condition\0$action". Values are
73 # magical in numeric context.
75 # The scalar ${'_<'.$filename} contains $filename.
77 # Note that no subroutine call is possible until &DB::sub is defined
78 # (for subroutines defined outside of the package DB). In fact the same is
79 # true if $deep is not defined.
84 # At start reads $rcfile that may set important options. This file
85 # may define a subroutine &afterinit that will be executed after the
86 # debugger is initialized.
88 # After $rcfile is read reads environment variable PERLDB_OPTS and parses
89 # it as a rest of `O ...' line in debugger prompt.
91 # The options that can be specified only at startup:
92 # [To set in $rcfile, call &parse_options("optionName=new_value").]
94 # TTY - the TTY to use for debugging i/o.
96 # noTTY - if set, goes in NonStop mode. On interrupt if TTY is not set
97 # uses the value of noTTY or "/tmp/perldbtty$$" to find TTY using
98 # Term::Rendezvous. Current variant is to have the name of TTY in this
101 # ReadLine - If false, dummy ReadLine is used, so you can debug
102 # ReadLine applications.
104 # NonStop - if true, no i/o is performed until interrupt.
106 # LineInfo - file or pipe to print line number info to. If it is a
107 # pipe, a short "emacs like" message is used.
109 # RemotePort - host:port to connect to on remote host for remote debugging.
111 # Example $rcfile: (delete leading hashes!)
113 # &parse_options("NonStop=1 LineInfo=db.out");
114 # sub afterinit { $trace = 1; }
116 # The script will run without human intervention, putting trace
117 # information into db.out. (If you interrupt it, you would better
118 # reset LineInfo to something "interactive"!)
120 ##################################################################
122 # Enhanced by ilya@math.ohio-state.edu (Ilya Zakharevich)
124 # modified Perl debugger, to be run from Emacs in perldb-mode
125 # Ray Lischner (uunet!mntgfx!lisch) as of 5 Nov 1990
126 # Johan Vromans -- upgrade to 4.0 pl 10
127 # Ilya Zakharevich -- patches after 5.001 (and some before ;-)
131 # A lot of things changed after 0.94. First of all, core now informs
132 # debugger about entry into XSUBs, overloaded operators, tied operations,
133 # BEGIN and END. Handy with `O f=2'.
135 # This can make debugger a little bit too verbose, please be patient
136 # and report your problems promptly.
138 # Now the option frame has 3 values: 0,1,2.
140 # Note that if DESTROY returns a reference to the object (or object),
141 # the deletion of data may be postponed until the next function call,
142 # due to the need to examine the return value.
144 # Changes: 0.95: `v' command shows versions.
145 # Changes: 0.96: `v' command shows version of readline.
146 # primitive completion works (dynamic variables, subs for `b' and `l',
147 # options). Can `p %var'
148 # Better help (`h <' now works). New commands <<, >>, {, {{.
149 # {dump|print}_trace() coded (to be able to do it from <<cmd).
150 # `c sub' documented.
151 # At last enough magic combined to stop after the end of debuggee.
152 # !! should work now (thanks to Emacs bracket matching an extra
153 # `]' in a regexp is caught).
154 # `L', `D' and `A' span files now (as documented).
155 # Breakpoints in `require'd code are possible (used in `R').
156 # Some additional words on internal work of debugger.
157 # `b load filename' implemented.
158 # `b postpone subr' implemented.
159 # now only `q' exits debugger (overwritable on $inhibit_exit).
160 # When restarting debugger breakpoints/actions persist.
161 # Buglet: When restarting debugger only one breakpoint/action per
162 # autoloaded function persists.
163 # Changes: 0.97: NonStop will not stop in at_exit().
164 # Option AutoTrace implemented.
165 # Trace printed differently if frames are printed too.
166 # new `inhibitExit' option.
167 # printing of a very long statement interruptible.
168 # Changes: 0.98: New command `m' for printing possible methods
169 # 'l -' is a synonym for `-'.
170 # Cosmetic bugs in printing stack trace.
171 # `frame' & 8 to print "expanded args" in stack trace.
172 # Can list/break in imported subs.
173 # new `maxTraceLen' option.
174 # frame & 4 and frame & 8 granted.
176 # nonstoppable lines do not have `:' near the line number.
177 # `b compile subname' implemented.
178 # Will not use $` any more.
179 # `-' behaves sane now.
180 # Changes: 0.99: Completion for `f', `m'.
181 # `m' will remove duplicate names instead of duplicate functions.
182 # `b load' strips trailing whitespace.
183 # completion ignores leading `|'; takes into account current package
184 # when completing a subroutine name (same for `l').
185 # Changes: 1.07: Many fixed by tchrist 13-March-2000
187 # + Added bare minimal security checks on perldb rc files, plus
188 # comments on what else is needed.
189 # + Fixed the ornaments that made "|h" completely unusable.
190 # They are not used in print_help if they will hurt. Strip pod
191 # if we're paging to less.
192 # + Fixed mis-formatting of help messages caused by ornaments
193 # to restore Larry's original formatting.
194 # + Fixed many other formatting errors. The code is still suboptimal,
195 # and needs a lot of work at restructuring. It's also misindented
197 # + Fixed bug where trying to look at an option like your pager
199 # + Fixed some $? processing. Note: if you use csh or tcsh, you will
200 # lose. You should consider shell escapes not using their shell,
201 # or else not caring about detailed status. This should really be
202 # unified into one place, too.
203 # + Fixed bug where invisible trailing whitespace on commands hoses you,
204 # tricking Perl into thinking you weren't calling a debugger command!
205 # + Fixed bug where leading whitespace on commands hoses you. (One
206 # suggests a leading semicolon or any other irrelevant non-whitespace
207 # to indicate literal Perl code.)
208 # + Fixed bugs that ate warnings due to wrong selected handle.
209 # + Fixed a precedence bug on signal stuff.
210 # + Fixed some unseemly wording.
211 # + Fixed bug in help command trying to call perl method code.
212 # + Fixed to call dumpvar from exception handler. SIGPIPE killed us.
214 # + Added some comments. This code is still nasty spaghetti.
215 # + Added message if you clear your pre/post command stacks which was
216 # very easy to do if you just typed a bare >, <, or {. (A command
217 # without an argument should *never* be a destructive action; this
218 # API is fundamentally screwed up; likewise option setting, which
219 # is equally buggered.)
220 # + Added command stack dump on argument of "?" for >, <, or {.
221 # + Added a semi-built-in doc viewer command that calls man with the
222 # proper %Config::Config path (and thus gets caching, man -k, etc),
223 # or else perldoc on obstreperous platforms.
224 # + Added to and rearranged the help information.
225 # + Detected apparent misuse of { ... } to declare a block; this used
226 # to work but now is a command, and mysteriously gave no complaint.
228 # Changes: 1.08: Apr 25, 2001 Jon Eveland <jweveland@yahoo.com>
230 # + This patch to perl5db.pl cleans up formatting issues on the help
231 # summary (h h) screen in the debugger. Mostly columnar alignment
232 # issues, plus converted the printed text to use all spaces, since
233 # tabs don't seem to help much here.
235 # Changes: 1.09: May 19, 2001 Ilya Zakharevich <ilya@math.ohio-state.edu>
236 # 0) Minor bugs corrected;
237 # a) Support for auto-creation of new TTY window on startup, either
238 # unconditionally, or if started as a kid of another debugger session;
239 # b) New `O'ption CreateTTY
240 # I<CreateTTY> bits control attempts to create a new TTY on events:
241 # 1: on fork() 2: debugger is started inside debugger
243 # c) Code to auto-create a new TTY window on OS/2 (currently one
244 # extra window per session - need named pipes to have more...);
245 # d) Simplified interface for custom createTTY functions (with a backward
246 # compatibility hack); now returns the TTY name to use; return of ''
247 # means that the function reset the I/O handles itself;
248 # d') Better message on the semantic of custom createTTY function;
249 # e) Convert the existing code to create a TTY into a custom createTTY
251 # f) Consistent support for TTY names of the form "TTYin,TTYout";
252 # g) Switch line-tracing output too to the created TTY window;
253 # h) make `b fork' DWIM with CORE::GLOBAL::fork;
254 # i) High-level debugger API cmd_*():
255 # cmd_b_load($filenamepart) # b load filenamepart
256 # cmd_b_line($lineno [, $cond]) # b lineno [cond]
257 # cmd_b_sub($sub [, $cond]) # b sub [cond]
258 # cmd_stop() # Control-C
259 # cmd_d($lineno) # d lineno (B)
260 # The cmd_*() API returns FALSE on failure; in this case it outputs
261 # the error message to the debugging output.
262 # j) Low-level debugger API
263 # break_on_load($filename) # b load filename
264 # @files = report_break_on_load() # List files with load-breakpoints
265 # breakable_line_in_filename($name, $from [, $to])
266 # # First breakable line in the
267 # # range $from .. $to. $to defaults
268 # # to $from, and may be less than $to
269 # breakable_line($from [, $to]) # Same for the current file
270 # break_on_filename_line($name, $lineno [, $cond])
271 # # Set breakpoint,$cond defaults to 1
272 # break_on_filename_line_range($name, $from, $to [, $cond])
273 # # As above, on the first
274 # # breakable line in range
275 # break_on_line($lineno [, $cond]) # As above, in the current file
276 # break_subroutine($sub [, $cond]) # break on the first breakable line
277 # ($name, $from, $to) = subroutine_filename_lines($sub)
278 # # The range of lines of the text
279 # The low-level API returns TRUE on success, and die()s on failure.
281 # Changes: 1.10: May 23, 2001 Daniel Lewart <d-lewart@uiuc.edu>
283 # + Fixed warnings generated by "perl -dWe 42"
284 # + Corrected spelling errors
285 # + Squeezed Help (h) output into 80 columns
287 # Changes: 1.11: May 24, 2001 David Dyck <dcd@tc.fluke.com>
288 # + Made "x @INC" work like it used to
290 # Changes: 1.12: May 24, 2001 Daniel Lewart <d-lewart@uiuc.edu>
291 # + Fixed warnings generated by "O" (Show debugger options)
292 # + Fixed warnings generated by "p 42" (Print expression)
293 # Changes: 1.13: Jun 19, 2001 Scott.L.Miller@compaq.com
294 # + Added windowSize option
295 # Changes: 1.14: Oct 9, 2001 multiple
296 # + Clean up after itself on VMS (Charles Lane in 12385)
297 # + Adding "@ file" syntax (Peter Scott in 12014)
298 # + Debug reloading selfloaded stuff (Ilya Zakharevich in 11457)
299 # + $^S and other debugger fixes (Ilya Zakharevich in 11120)
300 # + Forgot a my() declaration (Ilya Zakharevich in 11085)
301 # Changes: 1.15: Nov 6, 2001 Michael G Schwern <schwern@pobox.com>
302 # + Updated 1.14 change log
303 # + Added *dbline explainatory comments
304 # + Mentioning perldebguts man page
305 # Changes: 1.16: Feb 15, 2002 Mark-Jason Dominus <mjd@plover.com>
306 # + $onetimeDump improvements
307 # Changes: 1.17: Feb 20, 2002 Richard Foley <richard.foley@rfi.net>
308 # Moved some code to cmd_[.]()'s for clarity and ease of handling,
309 # rationalised the following commands and added cmd_wrapper() to
310 # enable switching between old and frighteningly consistent new
311 # behaviours for diehards: 'o CommandSet=pre580' (sigh...)
312 # a(add), A(del) # action expr (added del by line)
313 # + b(add), B(del) # break [line] (was b,D)
314 # + w(add), W(del) # watch expr (was W,W) added del by expr
315 # + h(summary), h h(long) # help (hh) (was h h,h)
316 # + m(methods), M(modules) # ... (was m,v)
317 # + o(option) # lc (was O)
318 # + v(view code), V(view Variables) # ... (was w,V)
319 # Changes: 1.18: Mar 17, 2002 Richard Foley <richard.foley@rfi.net>
320 # + fixed missing cmd_O bug
321 # Changes: 1.19: Mar 29, 2002 Spider Boardman
322 # + Added missing local()s -- DB::DB is called recursively.
324 ####################################################################
326 # Needed for the statement after exec():
328 BEGIN { $ini_warn = $^W; $^W = 0 } # Switch compilation warnings off until another BEGIN.
329 local($^W) = 0; # Switch run-time warnings off during init.
332 $dumpvar::arrayDepth,
333 $dumpvar::dumpDBFiles,
334 $dumpvar::dumpPackages,
335 $dumpvar::quoteHighBit,
336 $dumpvar::printUndef,
345 # Command-line + PERLLIB:
348 # $prevwarn = $prevdie = $prevbus = $prevsegv = ''; # Does not help?!
350 $trace = $signal = $single = 0; # Uninitialized warning suppression
351 # (local $^W cannot help - other packages!).
352 $inhibit_exit = $option{PrintRet} = 1;
354 @options = qw(hashDepth arrayDepth CommandSet dumpDepth
355 DumpDBFiles DumpPackages DumpReused
356 compactDump veryCompact quote HighBit undefPrint
357 globPrint PrintRet UsageOnly frame AutoTrace
358 TTY noTTY ReadLine NonStop LineInfo maxTraceLen
359 recallCommand ShellBang pager tkRunning ornaments
360 signalLevel warnLevel dieLevel inhibit_exit
361 ImmediateStop bareStringify CreateTTY
362 RemotePort windowSize);
365 hashDepth => \$dumpvar::hashDepth,
366 arrayDepth => \$dumpvar::arrayDepth,
367 CommandSet => \$CommandSet,
368 DumpDBFiles => \$dumpvar::dumpDBFiles,
369 DumpPackages => \$dumpvar::dumpPackages,
370 DumpReused => \$dumpvar::dumpReused,
371 HighBit => \$dumpvar::quoteHighBit,
372 undefPrint => \$dumpvar::printUndef,
373 globPrint => \$dumpvar::globPrint,
374 UsageOnly => \$dumpvar::usageOnly,
375 CreateTTY => \$CreateTTY,
376 bareStringify => \$dumpvar::bareStringify,
378 AutoTrace => \$trace,
379 inhibit_exit => \$inhibit_exit,
380 maxTraceLen => \$maxtrace,
381 ImmediateStop => \$ImmediateStop,
382 RemotePort => \$remoteport,
383 windowSize => \$window,
387 compactDump => \&dumpvar::compactDump,
388 veryCompact => \&dumpvar::veryCompact,
389 quote => \&dumpvar::quote,
392 ReadLine => \&ReadLine,
393 NonStop => \&NonStop,
394 LineInfo => \&LineInfo,
395 recallCommand => \&recallCommand,
396 ShellBang => \&shellBang,
398 signalLevel => \&signalLevel,
399 warnLevel => \&warnLevel,
400 dieLevel => \&dieLevel,
401 tkRunning => \&tkRunning,
402 ornaments => \&ornaments,
403 RemotePort => \&RemotePort,
407 compactDump => 'dumpvar.pl',
408 veryCompact => 'dumpvar.pl',
409 quote => 'dumpvar.pl',
412 # These guys may be defined in $ENV{PERL5DB} :
413 $rl = 1 unless defined $rl;
414 $warnLevel = 1 unless defined $warnLevel;
415 $dieLevel = 1 unless defined $dieLevel;
416 $signalLevel = 1 unless defined $signalLevel;
417 $pre = [] unless defined $pre;
418 $post = [] unless defined $post;
419 $pretype = [] unless defined $pretype;
420 $CreateTTY = 3 unless defined $CreateTTY;
421 $CommandSet = '580' unless defined $CommandSet;
423 warnLevel($warnLevel);
425 signalLevel($signalLevel);
428 defined $ENV{PAGER} ? $ENV{PAGER} :
429 eval { require Config } &&
430 defined $Config::Config{pager} ? $Config::Config{pager}
432 ) unless defined $pager;
434 &recallCommand("!") unless defined $prc;
435 &shellBang("!") unless defined $psh;
437 $maxtrace = 400 unless defined $maxtrace;
438 $ini_pids = $ENV{PERLDB_PIDS};
439 if (defined $ENV{PERLDB_PIDS}) {
440 $pids = "[$ENV{PERLDB_PIDS}]";
441 $ENV{PERLDB_PIDS} .= "->$$";
444 $ENV{PERLDB_PIDS} = "$$";
449 *emacs = $slave_editor if $slave_editor; # May be used in afterinit()...
451 if (-e "/dev/tty") { # this is the wrong metric!
454 $rcfile="perldb.ini";
457 # This isn't really safe, because there's a race
458 # between checking and opening. The solution is to
459 # open and fstat the handle, but then you have to read and
460 # eval the contents. But then the silly thing gets
461 # your lexical scope, which is unfortunately at best.
465 # Just exactly what part of the word "CORE::" don't you understand?
466 local $SIG{__WARN__};
469 unless (is_safe_file($file)) {
470 CORE::warn <<EO_GRIPE;
471 perldb: Must not source insecure rcfile $file.
472 You or the superuser must be the owner, and it must not
473 be writable by anyone but its owner.
479 CORE::warn("perldb: couldn't parse $file: $@") if $@;
483 # Verifies that owner is either real user or superuser and that no
484 # one but owner may write to it. This function is of limited use
485 # when called on a path instead of upon a handle, because there are
486 # no guarantees that filename (by dirent) whose file (by ino) is
487 # eventually accessed is the same as the one tested.
488 # Assumes that the file's existence is not in doubt.
491 stat($path) || return; # mysteriously vaporized
492 my($dev,$ino,$mode,$nlink,$uid,$gid) = stat(_);
494 return 0 if $uid != 0 && $uid != $<;
495 return 0 if $mode & 022;
500 safe_do("./$rcfile");
502 elsif (defined $ENV{HOME} && -f "$ENV{HOME}/$rcfile") {
503 safe_do("$ENV{HOME}/$rcfile");
505 elsif (defined $ENV{LOGDIR} && -f "$ENV{LOGDIR}/$rcfile") {
506 safe_do("$ENV{LOGDIR}/$rcfile");
509 if (defined $ENV{PERLDB_OPTS}) {
510 parse_options($ENV{PERLDB_OPTS});
513 if ( not defined &get_fork_TTY and defined $ENV{TERM} and $ENV{TERM} eq 'xterm'
514 and defined $ENV{WINDOWID} and defined $ENV{DISPLAY} ) { # _inside_ XTERM?
515 *get_fork_TTY = \&xterm_get_fork_TTY;
516 } elsif ($^O eq 'os2') {
517 *get_fork_TTY = \&os2_get_fork_TTY;
520 # Here begin the unreadable code. It needs fixing.
522 if (exists $ENV{PERLDB_RESTART}) {
523 delete $ENV{PERLDB_RESTART};
525 @hist = get_list('PERLDB_HIST');
526 %break_on_load = get_list("PERLDB_ON_LOAD");
527 %postponed = get_list("PERLDB_POSTPONE");
528 my @had_breakpoints= get_list("PERLDB_VISITED");
529 for (0 .. $#had_breakpoints) {
530 my %pf = get_list("PERLDB_FILE_$_");
531 $postponed_file{$had_breakpoints[$_]} = \%pf if %pf;
533 my %opt = get_list("PERLDB_OPT");
535 while (($opt,$val) = each %opt) {
536 $val =~ s/[\\\']/\\$1/g;
537 parse_options("$opt'$val'");
539 @INC = get_list("PERLDB_INC");
541 $pretype = [get_list("PERLDB_PRETYPE")];
542 $pre = [get_list("PERLDB_PRE")];
543 $post = [get_list("PERLDB_POST")];
544 @typeahead = get_list("PERLDB_TYPEAHEAD", @typeahead);
550 # Is Perl being run from a slave editor or graphical debugger?
551 $slave_editor = ((defined $main::ARGV[0]) and ($main::ARGV[0] eq '-emacs'));
552 $rl = 0, shift(@main::ARGV) if $slave_editor;
554 #require Term::ReadLine;
556 if ($^O eq 'cygwin') {
557 # /dev/tty is binary. use stdin for textmode
559 } elsif (-e "/dev/tty") {
560 $console = "/dev/tty";
561 } elsif ($^O eq 'dos' or -e "con" or $^O eq 'MSWin32') {
563 } elsif ($^O eq 'MacOS') {
564 if ($MacPerl::Version !~ /MPW/) {
565 $console = "Dev:Console:Perl Debug"; # Separate window for application
567 $console = "Dev:Console";
570 $console = "sys\$command";
573 if (($^O eq 'MSWin32') and ($slave_editor or defined $ENV{EMACS})) {
577 if ($^O eq 'NetWare') {
582 if (defined $ENV{OS2_SHELL} and ($slave_editor or $ENV{WINDOWID})) { # In OS/2
590 $console = $tty if defined $tty;
592 if (defined $remoteport) {
594 $OUT = new IO::Socket::INET( Timeout => '10',
595 PeerAddr => $remoteport,
598 if (!$OUT) { die "Unable to connect to remote host: $remoteport\n"; }
601 create_IN_OUT(4) if $CreateTTY & 4;
603 my ($i, $o) = split /,/, $console;
604 $o = $i unless defined $o;
605 open(IN,"+<$i") || open(IN,"<$i") || open(IN,"<&STDIN");
606 open(OUT,"+>$o") || open(OUT,">$o") || open(OUT,">&STDERR")
607 || open(OUT,">&STDOUT"); # so we don't dongle stdout
608 } elsif (not defined $console) {
610 open(OUT,">&STDERR") || open(OUT,">&STDOUT"); # so we don't dongle stdout
611 $console = 'STDIN/OUT';
613 # so open("|more") can read from STDOUT and so we don't dingle stdin
614 $IN = \*IN, $OUT = \*OUT if $console or not defined $console;
616 my $previous = select($OUT);
617 $| = 1; # for DB::OUT
620 $LINEINFO = $OUT unless defined $LINEINFO;
621 $lineinfo = $console unless defined $lineinfo;
623 $header =~ s/.Header: ([^,]+),v(\s+\S+\s+\S+).*$/$1$2/;
624 unless ($runnonstop) {
627 if ($term_pid eq '-1') {
628 print $OUT "\nDaughter DB session started...\n";
630 print $OUT "\nLoading DB routines from $header\n";
631 print $OUT ("Editor support ",
632 $slave_editor ? "enabled" : "available",
634 print $OUT "\nEnter h or `h h' for help, or `$doccmd perldebug' for more help.\n\n";
642 s/(.*)/'$1'/ unless /^-?[\d.]+$/;
645 if (defined &afterinit) { # May be defined in $rcfile
651 ############################################################ Subroutines
654 # _After_ the perl program is compiled, $single is set to 1:
655 if ($single and not $second_time++) {
656 if ($runnonstop) { # Disable until signal
657 for ($i=0; $i <= $stack_depth; ) {
661 # return; # Would not print trace!
662 } elsif ($ImmediateStop) {
667 $runnonstop = 0 if $single or $signal; # Disable it if interactive.
669 local($package, $filename, $line) = caller;
670 local $filename_ini = $filename;
671 local $usercontext = '($@, $!, $^E, $,, $/, $\, $^W) = @saved;' .
672 "package $package;"; # this won't let them modify, alas
673 local(*dbline) = $main::{'_<' . $filename};
675 # we need to check for pseudofiles on Mac OS (these are files
676 # not attached to a filename, but instead stored in Dev:Pseudo)
677 if ($^O eq 'MacOS' && $#dbline < 0) {
678 $filename_ini = $filename = 'Dev:Pseudo';
679 *dbline = $main::{'_<' . $filename};
682 local $max = $#dbline;
683 if ($dbline{$line} && (($stop,$action) = split(/\0/,$dbline{$line}))) {
687 $evalarg = "\$DB::signal |= 1 if do {$stop}"; &eval;
688 $dbline{$line} =~ s/;9($|\0)/$1/;
691 my $was_signal = $signal;
693 for (my $n = 0; $n <= $#to_watch; $n++) {
694 $evalarg = $to_watch[$n];
695 local $onetimeDump; # Do not output results
696 my ($val) = &eval; # Fix context (&eval is doing array)?
697 $val = ( (defined $val) ? "'$val'" : 'undef' );
698 if ($val ne $old_watch[$n]) {
701 Watchpoint $n:\t$to_watch[$n] changed:
702 old value:\t$old_watch[$n]
705 $old_watch[$n] = $val;
709 if ($trace & 4) { # User-installed watch
710 return if watchfunction($package, $filename, $line)
711 and not $single and not $was_signal and not ($trace & ~4);
713 $was_signal = $signal;
715 if ($single || ($trace & 1) || $was_signal) {
717 $position = "\032\032$filename:$line:0\n";
718 print_lineinfo($position);
719 } elsif ($package eq 'DB::fake') {
722 Debugged program terminated. Use B<q> to quit or B<R> to restart,
723 use B<O> I<inhibit_exit> to avoid stopping after program termination,
724 B<h q>, B<h R> or B<h O> to get additional info.
727 $usercontext = '($@, $!, $^E, $,, $/, $\, $^W) = @saved;' .
728 "package $package;"; # this won't let them modify, alas
731 $prefix = $sub =~ /::/ ? "" : "${'package'}::";
732 $prefix .= "$sub($filename:";
733 $after = ($dbline[$line] =~ /\n$/ ? '' : "\n");
734 if (length($prefix) > 30) {
735 $position = "$prefix$line):\n$line:\t$dbline[$line]$after";
740 $position = "$prefix$line$infix$dbline[$line]$after";
743 print_lineinfo(' ' x $stack_depth, "$line:\t$dbline[$line]$after");
745 print_lineinfo($position);
747 for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { #{ vi
748 last if $dbline[$i] =~ /^\s*[\;\}\#\n]/;
750 $after = ($dbline[$i] =~ /\n$/ ? '' : "\n");
751 $incr_pos = "$prefix$i$infix$dbline[$i]$after";
752 $position .= $incr_pos;
754 print_lineinfo(' ' x $stack_depth, "$i:\t$dbline[$i]$after");
756 print_lineinfo($incr_pos);
761 $evalarg = $action, &eval if $action;
762 if ($single || $was_signal) {
763 local $level = $level + 1;
764 foreach $evalarg (@$pre) {
767 print $OUT $stack_depth . " levels deep in subroutine calls!\n"
770 $incr = -1; # for backward motion.
771 @typeahead = (@$pretype, @typeahead);
773 while (($term || &setterm),
774 ($term_pid == $$ or resetterm(1)),
775 defined ($cmd=&readline("$pidprompt DB" . ('<' x $level) .
776 ($#hist+1) . ('>' x $level) . " ")))
780 $cmd =~ s/\\$/\n/ && do {
781 $cmd .= &readline(" cont: ");
784 $cmd =~ /^$/ && ($cmd = $laststep);
785 push(@hist,$cmd) if length($cmd) > 1;
787 $cmd =~ s/^\s+//s; # trim annoying leading whitespace
788 $cmd =~ s/\s+$//s; # trim annoying trailing whitespace
789 ($i) = split(/\s+/,$cmd);
791 # squelch the sigmangler
793 local $SIG{__WARN__};
794 eval "\$cmd =~ $alias{$i}";
797 print $OUT "Couldn't evaluate `$i' alias: $@";
801 $cmd =~ /^q$/ && do {
806 $cmd =~ /^t$/ && do {
809 print $OUT "Trace = " .
810 (($trace & 1) ? "on" : "off" ) . "\n";
812 $cmd =~ /^S(\s+(!)?(.+))?$/ && do {
813 $Srev = defined $2; $Spatt = $3; $Snocheck = ! defined $1;
816 foreach $subname (sort(keys %sub)) {
817 if ($Snocheck or $Srev^($subname =~ /$Spatt/)) {
818 print $OUT $subname,"\n";
822 $cmd =~ s/^X\b/V $package/;
823 $cmd =~ /^V$/ && do {
824 $cmd = "V $package"; };
825 $cmd =~ /^V\b\s*(\S+)\s*(.*)/ && do {
826 local ($savout) = select($OUT);
828 @vars = split(' ',$2);
829 do 'dumpvar.pl' unless defined &main::dumpvar;
830 if (defined &main::dumpvar) {
833 # must detect sigpipe failures
834 eval { &main::dumpvar($packname,
835 defined $option{dumpDepth}
836 ? $option{dumpDepth} : -1,
839 die unless $@ =~ /dumpvar print failed/;
842 print $OUT "dumpvar.pl not available.\n";
846 $cmd =~ s/^x\b/ / && do { # So that will be evaled
847 $onetimeDump = 'dump';
848 # handle special "x 3 blah" syntax
849 if ($cmd =~ s/^\s*(\d+)(?=\s)/ /) {
850 $onetimedumpDepth = $1;
853 $cmd =~ s/^m\s+([\w:]+)\s*$/ / && do {
854 methods($1); next CMD};
855 $cmd =~ s/^m\b/ / && do { # So this will be evaled
856 $onetimeDump = 'methods'; };
857 $cmd =~ /^f\b\s*(.*)/ && do {
861 print $OUT "The old f command is now the r command.\n"; # hint
862 print $OUT "The new f command switches filenames.\n";
865 if (!defined $main::{'_<' . $file}) {
866 if (($try) = grep(m#^_<.*$file#, keys %main::)) {{
867 $try = substr($try,2);
868 print $OUT "Choosing $try matching `$file':\n";
872 if (!defined $main::{'_<' . $file}) {
873 print $OUT "No file matching `$file' is loaded.\n";
875 } elsif ($file ne $filename) {
876 *dbline = $main::{'_<' . $file};
882 print $OUT "Already in $file.\n";
886 $cmd =~ /^\.$/ && do {
887 $incr = -1; # for backward motion.
889 $filename = $filename_ini;
890 *dbline = $main::{'_<' . $filename};
892 print_lineinfo($position);
894 $cmd =~ /^-$/ && do {
895 $start -= $incr + $window + 1;
896 $start = 1 if $start <= 0;
898 $cmd = 'l ' . ($start) . '+'; };
900 $cmd =~ /^([aAbBhlLMoOvwW])\b\s*(.*)/s && do {
901 &cmd_wrapper($1, $2, $line);
905 $cmd =~ /^\<\<\s*(.*)/ && do { # \<\< for CPerl sake: not HERE
906 push @$pre, action($1);
908 $cmd =~ /^>>\s*(.*)/ && do {
909 push @$post, action($1);
911 $cmd =~ /^<\s*(.*)/ && do {
913 print $OUT "All < actions cleared.\n";
919 print $OUT "No pre-prompt Perl actions.\n";
922 print $OUT "Perl commands run before each prompt:\n";
923 for my $action ( @$pre ) {
924 print $OUT "\t< -- $action\n";
930 $cmd =~ /^>\s*(.*)/ && do {
932 print $OUT "All > actions cleared.\n";
938 print $OUT "No post-prompt Perl actions.\n";
941 print $OUT "Perl commands run after each prompt:\n";
942 for my $action ( @$post ) {
943 print $OUT "\t> -- $action\n";
947 $post = [action($1)];
949 $cmd =~ /^\{\{\s*(.*)/ && do {
950 if ($cmd =~ /^\{.*\}$/ && unbalanced(substr($cmd,2))) {
951 print $OUT "{{ is now a debugger command\n",
952 "use `;{{' if you mean Perl code\n";
958 $cmd =~ /^\{\s*(.*)/ && do {
960 print $OUT "All { actions cleared.\n";
966 print $OUT "No pre-prompt debugger actions.\n";
969 print $OUT "Debugger commands run before each prompt:\n";
970 for my $action ( @$pretype ) {
971 print $OUT "\t{ -- $action\n";
975 if ($cmd =~ /^\{.*\}$/ && unbalanced(substr($cmd,1))) {
976 print $OUT "{ is now a debugger command\n",
977 "use `;{' if you mean Perl code\n";
983 $cmd =~ /^y(?:\s+(\d*)\s*(.*))?$/ && do {
984 eval { require PadWalker; PadWalker->VERSION(0.08) }
985 or &warn($@ =~ /locate/
986 ? "PadWalker module not found - please install\n"
989 do 'dumpvar.pl' unless defined &main::dumpvar;
990 defined &main::dumpvar
991 or print $OUT "dumpvar.pl not available.\n"
993 my @vars = split(' ', $2 || '');
994 my $h = eval { PadWalker::peek_my(($1 || 0) + 1) };
995 $@ and $@ =~ s/ at .*//, &warn($@), next CMD;
996 my $savout = select($OUT);
997 dumpvar::dumplex($_, $h->{$_},
998 defined $option{dumpDepth}
999 ? $option{dumpDepth} : -1,
1004 $cmd =~ /^n$/ && do {
1005 end_report(), next CMD if $finished and $level <= 1;
1009 $cmd =~ /^s$/ && do {
1010 end_report(), next CMD if $finished and $level <= 1;
1014 $cmd =~ /^c\b\s*([\w:]*)\s*$/ && do {
1015 end_report(), next CMD if $finished and $level <= 1;
1017 # Probably not needed, since we finish an interactive
1018 # sub-session anyway...
1019 # local $filename = $filename;
1020 # local *dbline = *dbline; # XXX Would this work?!
1021 if ($subname =~ /\D/) { # subroutine name
1022 $subname = $package."::".$subname
1023 unless $subname =~ /::/;
1024 ($file,$i) = (find_sub($subname) =~ /^(.*):(.*)$/);
1028 *dbline = $main::{'_<' . $filename};
1029 $had_breakpoints{$filename} |= 1;
1031 ++$i while $dbline[$i] == 0 && $i < $max;
1033 print $OUT "Subroutine $subname not found.\n";
1038 if ($dbline[$i] == 0) {
1039 print $OUT "Line $i not breakable.\n";
1042 $dbline{$i} =~ s/($|\0)/;9$1/; # add one-time-only b.p.
1044 for ($i=0; $i <= $stack_depth; ) {
1048 $cmd =~ /^r$/ && do {
1049 end_report(), next CMD if $finished and $level <= 1;
1050 $stack[$stack_depth] |= 1;
1051 $doret = $option{PrintRet} ? $stack_depth - 1 : -2;
1053 $cmd =~ /^R$/ && do {
1054 print $OUT "Warning: some settings and command-line options may be lost!\n";
1055 my (@script, @flags, $cl);
1056 push @flags, '-w' if $ini_warn;
1057 # Put all the old includes at the start to get
1058 # the same debugger.
1060 push @flags, '-I', $_;
1062 push @flags, '-T' if ${^TAINT};
1063 # Arrange for setting the old INC:
1064 set_list("PERLDB_INC", @ini_INC);
1066 for (1..$#{'::_<-e'}) { # The first line is PERL5DB
1067 chomp ($cl = ${'::_<-e'}[$_]);
1068 push @script, '-e', $cl;
1073 set_list("PERLDB_HIST",
1074 $term->Features->{getHistory}
1075 ? $term->GetHistory : @hist);
1076 my @had_breakpoints = keys %had_breakpoints;
1077 set_list("PERLDB_VISITED", @had_breakpoints);
1078 set_list("PERLDB_OPT", %option);
1079 set_list("PERLDB_ON_LOAD", %break_on_load);
1081 for (0 .. $#had_breakpoints) {
1082 my $file = $had_breakpoints[$_];
1083 *dbline = $main::{'_<' . $file};
1084 next unless %dbline or $postponed_file{$file};
1085 (push @hard, $file), next
1086 if $file =~ /^\(\w*eval/;
1088 @add = %{$postponed_file{$file}}
1089 if $postponed_file{$file};
1090 set_list("PERLDB_FILE_$_", %dbline, @add);
1092 for (@hard) { # Yes, really-really...
1093 # Find the subroutines in this eval
1094 *dbline = $main::{'_<' . $_};
1095 my ($quoted, $sub, %subs, $line) = quotemeta $_;
1096 for $sub (keys %sub) {
1097 next unless $sub{$sub} =~ /^$quoted:(\d+)-(\d+)$/;
1098 $subs{$sub} = [$1, $2];
1102 "No subroutines in $_, ignoring breakpoints.\n";
1105 LINES: for $line (keys %dbline) {
1106 # One breakpoint per sub only:
1107 my ($offset, $sub, $found);
1108 SUBS: for $sub (keys %subs) {
1109 if ($subs{$sub}->[1] >= $line # Not after the subroutine
1110 and (not defined $offset # Not caught
1111 or $offset < 0 )) { # or badly caught
1113 $offset = $line - $subs{$sub}->[0];
1114 $offset = "+$offset", last SUBS if $offset >= 0;
1117 if (defined $offset) {
1118 $postponed{$found} =
1119 "break $offset if $dbline{$line}";
1121 print $OUT "Breakpoint in $_:$line ignored: after all the subroutines.\n";
1125 set_list("PERLDB_POSTPONE", %postponed);
1126 set_list("PERLDB_PRETYPE", @$pretype);
1127 set_list("PERLDB_PRE", @$pre);
1128 set_list("PERLDB_POST", @$post);
1129 set_list("PERLDB_TYPEAHEAD", @typeahead);
1130 $ENV{PERLDB_RESTART} = 1;
1131 delete $ENV{PERLDB_PIDS}; # Restore ini state
1132 $ENV{PERLDB_PIDS} = $ini_pids if defined $ini_pids;
1133 #print "$^X, '-d', @flags, @script, ($slave_editor ? '-emacs' : ()), @ARGS";
1134 exec($^X, '-d', @flags, @script, ($slave_editor ? '-emacs' : ()), @ARGS) ||
1135 print $OUT "exec failed: $!\n";
1137 $cmd =~ /^T$/ && do {
1138 print_trace($OUT, 1); # skip DB
1140 $cmd =~ /^w\b\s*(.*)/s && do { &cmd_w($1); next CMD; };
1141 $cmd =~ /^W\b\s*(.*)/s && do { &cmd_W($1); next CMD; };
1142 $cmd =~ /^\/(.*)$/ && do {
1144 $inpat =~ s:([^\\])/$:$1:;
1146 # squelch the sigmangler
1147 local $SIG{__DIE__};
1148 local $SIG{__WARN__};
1149 eval '$inpat =~ m'."\a$inpat\a";
1161 $start = 1 if ($start > $max);
1162 last if ($start == $end);
1163 if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) {
1164 if ($slave_editor) {
1165 print $OUT "\032\032$filename:$start:0\n";
1167 print $OUT "$start:\t", $dbline[$start], "\n";
1172 print $OUT "/$pat/: not found\n" if ($start == $end);
1174 $cmd =~ /^\?(.*)$/ && do {
1176 $inpat =~ s:([^\\])\?$:$1:;
1178 # squelch the sigmangler
1179 local $SIG{__DIE__};
1180 local $SIG{__WARN__};
1181 eval '$inpat =~ m'."\a$inpat\a";
1193 $start = $max if ($start <= 0);
1194 last if ($start == $end);
1195 if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) {
1196 if ($slave_editor) {
1197 print $OUT "\032\032$filename:$start:0\n";
1199 print $OUT "$start:\t", $dbline[$start], "\n";
1204 print $OUT "?$pat?: not found\n" if ($start == $end);
1206 $cmd =~ /^$rc+\s*(-)?(\d+)?$/ && do {
1207 pop(@hist) if length($cmd) > 1;
1208 $i = $1 ? ($#hist-($2||1)) : ($2||$#hist);
1210 print $OUT $cmd, "\n";
1212 $cmd =~ /^$sh$sh\s*([\x00-\xff]*)/ && do {
1215 $cmd =~ /^$rc([^$rc].*)$/ && do {
1217 pop(@hist) if length($cmd) > 1;
1218 for ($i = $#hist; $i; --$i) {
1219 last if $hist[$i] =~ /$pat/;
1222 print $OUT "No such command!\n\n";
1226 print $OUT $cmd, "\n";
1228 $cmd =~ /^$sh$/ && do {
1229 &system($ENV{SHELL}||"/bin/sh");
1231 $cmd =~ /^$sh\s*([\x00-\xff]*)/ && do {
1232 # XXX: using csh or tcsh destroys sigint retvals!
1233 #&system($1); # use this instead
1234 &system($ENV{SHELL}||"/bin/sh","-c",$1);
1236 $cmd =~ /^H\b\s*(-(\d+))?/ && do {
1237 $end = $2 ? ($#hist-$2) : 0;
1238 $hist = 0 if $hist < 0;
1239 for ($i=$#hist; $i>$end; $i--) {
1240 print $OUT "$i: ",$hist[$i],"\n"
1241 unless $hist[$i] =~ /^.?$/;
1244 $cmd =~ /^(?:man|(?:perl)?doc)\b(?:\s+([^(]*))?$/ && do {
1247 $cmd =~ s/^p$/print {\$DB::OUT} \$_/;
1248 $cmd =~ s/^p\b/print {\$DB::OUT} /;
1249 $cmd =~ s/^=\s*// && do {
1251 if (length $cmd == 0) {
1252 @keys = sort keys %alias;
1253 } elsif (my($k,$v) = ($cmd =~ /^(\S+)\s+(\S.*)/)) {
1254 # can't use $_ or kill //g state
1255 for my $x ($k, $v) { $x =~ s/\a/\\a/g }
1256 $alias{$k} = "s\a$k\a$v\a";
1257 # squelch the sigmangler
1258 local $SIG{__DIE__};
1259 local $SIG{__WARN__};
1260 unless (eval "sub { s\a$k\a$v\a }; 1") {
1261 print $OUT "Can't alias $k to $v: $@\n";
1270 if ((my $v = $alias{$k}) =~ s
\as\a$k\a(.*)\a$
\a1
\a) {
1271 print $OUT "$k\t= $1\n";
1273 elsif (defined $alias{$k}) {
1274 print $OUT "$k\t$alias{$k}\n";
1277 print "No alias for $k\n";
1281 $cmd =~ /^source\s+(.*\S)/ && do {
1282 if (open my $fh, $1) {
1285 &warn("Can't execute `$1': $!\n");
1288 $cmd =~ /^\|\|?\s*[^|]/ && do {
1289 if ($pager =~ /^\|/) {
1290 open(SAVEOUT,">&STDOUT") || &warn("Can't save STDOUT");
1291 open(STDOUT,">&OUT") || &warn("Can't redirect STDOUT");
1293 open(SAVEOUT,">&OUT") || &warn("Can't save DB::OUT");
1296 unless ($piped=open(OUT,$pager)) {
1297 &warn("Can't pipe output to `$pager'");
1298 if ($pager =~ /^\|/) {
1299 open(OUT,">&STDOUT") # XXX: lost message
1300 || &warn("Can't restore DB::OUT");
1301 open(STDOUT,">&SAVEOUT")
1302 || &warn("Can't restore STDOUT");
1305 open(OUT,">&STDOUT") # XXX: lost message
1306 || &warn("Can't restore DB::OUT");
1310 $SIG{PIPE}= \&DB::catch if $pager =~ /^\|/
1311 && ("" eq $SIG{PIPE} || "DEFAULT" eq $SIG{PIPE});
1312 $selected= select(OUT);
1314 select( $selected ), $selected= "" unless $cmd =~ /^\|\|/;
1315 $cmd =~ s/^\|+\s*//;
1318 # XXX Local variants do not work!
1319 $cmd =~ s/^t\s/\$DB::trace |= 1;\n/;
1320 $cmd =~ s/^s\s/\$DB::single = 1;\n/ && do {$laststep = 's'};
1321 $cmd =~ s/^n\s/\$DB::single = 2;\n/ && do {$laststep = 'n'};
1323 $evalarg = "\$^D = \$^D | \$DB::db_stop;\n$cmd"; &eval;
1325 $onetimeDump = undef;
1326 $onetimedumpDepth = undef;
1327 } elsif ($term_pid == $$) {
1332 if ($pager =~ /^\|/) {
1334 # we cannot warn here: the handle is missing --tchrist
1335 close(OUT) || print SAVEOUT "\nCan't close DB::OUT\n";
1337 # most of the $? crud was coping with broken cshisms
1339 print SAVEOUT "Pager `$pager' failed: ";
1341 print SAVEOUT "shell returned -1\n";
1344 ( $? & 127 ) ? " (SIG#".($?&127).")" : "",
1345 ( $? & 128 ) ? " -- core dumped" : "", "\n";
1347 print SAVEOUT "status ", ($? >> 8), "\n";
1351 open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT");
1352 open(STDOUT,">&SAVEOUT") || &warn("Can't restore STDOUT");
1353 $SIG{PIPE} = "DEFAULT" if $SIG{PIPE} eq \&DB::catch;
1354 # Will stop ignoring SIGPIPE if done like nohup(1)
1355 # does SIGINT but Perl doesn't give us a choice.
1357 open(OUT,">&SAVEOUT") || &warn("Can't restore DB::OUT");
1360 select($selected), $selected= "" unless $selected eq "";
1364 $fall_off_end = 1 unless defined $cmd; # Emulate `q' on EOF
1365 foreach $evalarg (@$post) {
1368 } # if ($single || $signal)
1369 ($@, $!, $^E, $,, $/, $\, $^W) = @saved;
1373 # The following code may be executed now:
1377 my ($al, $ret, @ret) = "";
1378 if (length($sub) > 10 && substr($sub, -10, 10) eq '::AUTOLOAD') {
1381 local $stack_depth = $stack_depth + 1; # Protect from non-local exits
1382 $#stack = $stack_depth;
1383 $stack[-1] = $single;
1385 $single |= 4 if $stack_depth == $deep;
1387 ? ( print_lineinfo(' ' x ($stack_depth - 1), "in "),
1388 # Why -1? But it works! :-(
1389 print_trace($LINEINFO, -1, 1, 1, "$sub$al") )
1390 : print_lineinfo(' ' x ($stack_depth - 1), "entering $sub$al\n")) if $frame;
1393 $single |= $stack[$stack_depth--];
1395 ? ( print_lineinfo(' ' x $stack_depth, "out "),
1396 print_trace($LINEINFO, -1, 1, 1, "$sub$al") )
1397 : print_lineinfo(' ' x $stack_depth, "exited $sub$al\n")) if $frame & 2;
1398 if ($doret eq $stack_depth or $frame & 16) {
1400 my $fh = ($doret eq $stack_depth ? $OUT : $LINEINFO);
1401 print $fh ' ' x $stack_depth if $frame & 16;
1402 print $fh "list context return from $sub:\n";
1403 dumpit($fh, \@ret );
1408 if (defined wantarray) {
1413 $single |= $stack[$stack_depth--];
1415 ? ( print_lineinfo(' ' x $stack_depth, "out "),
1416 print_trace($LINEINFO, -1, 1, 1, "$sub$al") )
1417 : print_lineinfo(' ' x $stack_depth, "exited $sub$al\n")) if $frame & 2;
1418 if ($doret eq $stack_depth or $frame & 16 and defined wantarray) {
1420 my $fh = ($doret eq $stack_depth ? $OUT : $LINEINFO);
1421 print $fh (' ' x $stack_depth) if $frame & 16;
1422 print $fh (defined wantarray
1423 ? "scalar context return from $sub: "
1424 : "void context return from $sub\n");
1425 dumpit( $fh, $ret ) if defined wantarray;
1434 ### Functions with multiple modes of failure die on error, the rest
1435 ### returns FALSE on error.
1436 ### User-interface functions cmd_* output error message.
1438 ### Note all cmd_[a-zA-Z]'s require $line, $dblineno as first arguments
1443 'A' => 'pre580_null',
1445 'B' => 'pre580_null',
1446 'd' => 'pre580_null',
1449 'M' => 'pre580_null',
1451 'o' => 'pre580_null',
1461 my $dblineno = shift;
1463 # with this level of indirection we can wrap
1464 # to old (pre580) or other command sets easily
1467 $set{$CommandSet}{$cmd} || $cmd
1469 # print "cmd_wrapper($cmd): $CommandSet($set{$CommandSet}{$cmd}) => call($call)\n";
1471 return &$call($line, $dblineno);
1475 my $line = shift || ''; # [.|line] expr
1476 my $dbline = shift; $line =~ s/^(\.|(?:[^\d]))/$dbline/;
1477 if ($line =~ /^\s*(\d*)\s*(\S.+)/) {
1478 my ($lineno, $expr) = ($1, $2);
1480 if ($dbline[$lineno] == 0) {
1481 print $OUT "Line $lineno($dbline[$lineno]) does not have an action?\n";
1483 $had_breakpoints{$filename} |= 2;
1484 $dbline{$lineno} =~ s/\0[^\0]*//;
1485 $dbline{$lineno} .= "\0" . action($expr);
1489 print $OUT "Adding an action requires an optional lineno and an expression\n"; # hint
1494 my $line = shift || '';
1495 my $dbline = shift; $line =~ s/^\./$dbline/;
1497 eval { &delete_action(); 1 } or print $OUT $@ and return;
1498 } elsif ($line =~ /^(\S.*)/) {
1499 eval { &delete_action($1); 1 } or print $OUT $@ and return;
1501 print $OUT "Deleting an action requires a line number, or '*' for all\n"; # hint
1508 die "Line $i has no action .\n" if $dbline[$i] == 0;
1509 $dbline{$i} =~ s/\0[^\0]*//; # \^a
1510 delete $dbline{$i} if $dbline{$i} eq '';
1512 print $OUT "Deleting all actions...\n";
1513 for my $file (keys %had_breakpoints) {
1514 local *dbline = $main::{'_<' . $file};
1517 for ($i = 1; $i <= $max ; $i++) {
1518 if (defined $dbline{$i}) {
1519 $dbline{$i} =~ s/\0[^\0]*//;
1520 delete $dbline{$i} if $dbline{$i} eq '';
1522 unless ($had_breakpoints{$file} &= ~2) {
1523 delete $had_breakpoints{$file};
1531 my $line = shift; # [.|line] [cond]
1532 my $dbline = shift; $line =~ s/^\./$dbline/;
1533 if ($line =~ /^\s*$/) {
1534 &cmd_b_line($dbline, 1);
1535 } elsif ($line =~ /^load\b\s*(.*)/) {
1536 my $file = $1; $file =~ s/\s+$//;
1538 } elsif ($line =~ /^(postpone|compile)\b\s*([':A-Za-z_][':\w]*)\s*(.*)/) {
1539 my $cond = length $3 ? $3 : '1';
1540 my ($subname, $break) = ($2, $1 eq 'postpone');
1541 $subname =~ s/\'/::/g;
1542 $subname = "${'package'}::" . $subname unless $subname =~ /::/;
1543 $subname = "main".$subname if substr($subname,0,2) eq "::";
1544 $postponed{$subname} = $break ? "break +0 if $cond" : "compile";
1545 } elsif ($line =~ /^([':A-Za-z_][':\w]*(?:\[.*\])?)\s*(.*)/) {
1547 $cond = length $2 ? $2 : '1';
1548 &cmd_b_sub($subname, $cond);
1549 } elsif ($line =~ /^(\d*)\s*(.*)/) {
1550 $line = $1 || $dbline;
1551 $cond = length $2 ? $2 : '1';
1552 &cmd_b_line($line, $cond);
1554 print "confused by line($line)?\n";
1560 $break_on_load{$file} = 1;
1561 $had_breakpoints{$file} |= 1;
1564 sub report_break_on_load {
1565 sort keys %break_on_load;
1573 push @files, $::INC{$file} if $::INC{$file};
1574 $file .= '.pm', redo unless $file =~ /\./;
1576 break_on_load($_) for @files;
1577 @files = report_break_on_load;
1580 print $OUT "Will stop on load of `@files'.\n";
1583 $filename_error = '';
1585 sub breakable_line {
1586 my ($from, $to) = @_;
1589 my $delta = $from < $to ? +1 : -1;
1590 my $limit = $delta > 0 ? $#dbline : 1;
1591 $limit = $to if ($limit - $to) * $delta > 0;
1592 $i += $delta while $dbline[$i] == 0 and ($limit - $i) * $delta > 0;
1594 return $i unless $dbline[$i] == 0;
1595 my ($pl, $upto) = ('', '');
1596 ($pl, $upto) = ('s', "..$to") if @_ >=2 and $from != $to;
1597 die "Line$pl $from$upto$filename_error not breakable\n";
1600 sub breakable_line_in_filename {
1602 local *dbline = $main::{'_<' . $f};
1603 local $filename_error = " of `$f'";
1608 my ($i, $cond) = @_;
1609 $cond = 1 unless @_ >= 2;
1613 die "Line $i$filename_error not breakable.\n" if $dbline[$i] == 0;
1614 $had_breakpoints{$filename} |= 1;
1615 if ($dbline{$i}) { $dbline{$i} =~ s/^[^\0]*/$cond/; }
1616 else { $dbline{$i} = $cond; }
1620 eval { break_on_line(@_); 1 } or do {
1622 print $OUT $@ and return;
1626 sub break_on_filename_line {
1627 my ($f, $i, $cond) = @_;
1628 $cond = 1 unless @_ >= 3;
1629 local *dbline = $main::{'_<' . $f};
1630 local $filename_error = " of `$f'";
1631 local $filename = $f;
1632 break_on_line($i, $cond);
1635 sub break_on_filename_line_range {
1636 my ($f, $from, $to, $cond) = @_;
1637 my $i = breakable_line_in_filename($f, $from, $to);
1638 $cond = 1 unless @_ >= 3;
1639 break_on_filename_line($f,$i,$cond);
1642 sub subroutine_filename_lines {
1643 my ($subname,$cond) = @_;
1644 # Filename below can contain ':'
1645 find_sub($subname) =~ /^(.*):(\d+)-(\d+)$/;
1648 sub break_subroutine {
1649 my $subname = shift;
1650 my ($file,$s,$e) = subroutine_filename_lines($subname) or
1651 die "Subroutine $subname not found.\n";
1652 $cond = 1 unless @_ >= 2;
1653 break_on_filename_line_range($file,$s,$e,@_);
1657 my ($subname,$cond) = @_;
1658 $cond = 1 unless @_ >= 2;
1659 unless (ref $subname eq 'CODE') {
1660 $subname =~ s/\'/::/g;
1662 $subname = "${'package'}::" . $subname
1663 unless $subname =~ /::/;
1664 $subname = "CORE::GLOBAL::$s"
1665 if not defined &$subname and $s !~ /::/ and defined &{"CORE::GLOBAL::$s"};
1666 $subname = "main".$subname if substr($subname,0,2) eq "::";
1668 eval { break_subroutine($subname,$cond); 1 } or do {
1670 print $OUT $@ and return;
1675 my $line = ($_[0] =~ /^\./) ? $dbline : shift || '';
1676 my $dbline = shift; $line =~ s/^\./$dbline/;
1678 eval { &delete_breakpoint(); 1 } or print $OUT $@ and return;
1679 } elsif ($line =~ /^(\S.*)/) {
1680 eval { &delete_breakpoint($line || $dbline); 1 } or do {
1682 print $OUT $@ and return;
1685 print $OUT "Deleting a breakpoint requires a line number, or '*' for all\n"; # hint
1689 sub delete_breakpoint {
1692 die "Line $i not breakable.\n" if $dbline[$i] == 0;
1693 $dbline{$i} =~ s/^[^\0]*//;
1694 delete $dbline{$i} if $dbline{$i} eq '';
1696 print $OUT "Deleting all breakpoints...\n";
1697 for my $file (keys %had_breakpoints) {
1698 local *dbline = $main::{'_<' . $file};
1701 for ($i = 1; $i <= $max ; $i++) {
1702 if (defined $dbline{$i}) {
1703 $dbline{$i} =~ s/^[^\0]+//;
1704 if ($dbline{$i} =~ s/^\0?$//) {
1709 if (not $had_breakpoints{$file} &= ~1) {
1710 delete $had_breakpoints{$file};
1714 undef %postponed_file;
1715 undef %break_on_load;
1719 sub cmd_stop { # As on ^C, but not signal-safy.
1724 my $line = shift || '';
1725 if ($line =~ /^h\s*/) {
1727 } elsif ($line =~ /^(\S.*)$/) {
1728 # support long commands; otherwise bogus errors
1729 # happen when you ask for h on <CR> for example
1730 my $asked = $1; # for proper errmsg
1731 my $qasked = quotemeta($asked); # for searching
1732 # XXX: finds CR but not <CR>
1733 if ($help =~ /^<?(?:[IB]<)$qasked/m) {
1734 while ($help =~ /^(<?(?:[IB]<)$qasked([\s\S]*?)\n)(?!\s)/mg) {
1738 print_help("B<$asked> is not a debugger command.\n");
1741 print_help($summary);
1747 $line =~ s/^-\s*$/-/;
1748 if ($line =~ /^(\$.*)/s) {
1751 print($OUT "Error: $@\n"), next CMD if $@;
1753 print($OUT "Interpreted as: $1 $s\n");
1756 } elsif ($line =~ /^([\':A-Za-z_][\':\w]*(\[.*\])?)/s) {
1757 my $s = $subname = $1;
1758 $subname =~ s/\'/::/;
1759 $subname = $package."::".$subname
1760 unless $subname =~ /::/;
1761 $subname = "CORE::GLOBAL::$s"
1762 if not defined &$subname and $s !~ /::/
1763 and defined &{"CORE::GLOBAL::$s"};
1764 $subname = "main".$subname if substr($subname,0,2) eq "::";
1765 @pieces = split(/:/,find_sub($subname) || $sub{$subname});
1766 $subrange = pop @pieces;
1767 $file = join(':', @pieces);
1768 if ($file ne $filename) {
1769 print $OUT "Switching to file '$file'.\n"
1770 unless $slave_editor;
1771 *dbline = $main::{'_<' . $file};
1776 if (eval($subrange) < -$window) {
1777 $subrange =~ s/-.*/+/;
1782 print $OUT "Subroutine $subname not found.\n";
1784 } elsif ($line =~ /^\s*$/) {
1785 $incr = $window - 1;
1786 $line = $start . '-' . ($start + $incr);
1788 } elsif ($line =~ /^(\d*)\+(\d*)$/) {
1791 $incr = $window - 1 unless $incr;
1792 $line = $start . '-' . ($start + $incr);
1794 } elsif ($line =~ /^((-?[\d\$\.]+)([-,]([\d\$\.]+))?)?/) {
1795 $end = (!defined $2) ? $max : ($4 ? $4 : $2);
1796 $end = $max if $end > $max;
1798 $i = $line if $i eq '.';
1801 if ($slave_editor) {
1802 print $OUT "\032\032$filename:$i:0\n";
1805 for (; $i <= $end; $i++) {
1807 ($stop,$action) = split(/\0/, $dbline{$i}) if
1810 and $filename eq $filename_ini)
1812 : ($dbline[$i]+0 ? ':' : ' ') ;
1813 $arrow .= 'b' if $stop;
1814 $arrow .= 'a' if $action;
1815 print $OUT "$i$arrow\t", $dbline[$i];
1816 $i++, last if $signal;
1818 print $OUT "\n" unless $dbline[$i-1] =~ /\n$/;
1820 $start = $i; # remember in case they want more
1821 $start = $max if $start > $max;
1826 my $arg = shift || 'abw'; $arg = 'abw' unless $CommandSet eq '580'; # sigh...
1827 my $action_wanted = ($arg =~ /a/) ? 1 : 0;
1828 my $break_wanted = ($arg =~ /b/) ? 1 : 0;
1829 my $watch_wanted = ($arg =~ /w/) ? 1 : 0;
1831 if ($break_wanted or $action_wanted) {
1832 for my $file (keys %had_breakpoints) {
1833 local *dbline = $main::{'_<' . $file};
1836 for ($i = 1; $i <= $max; $i++) {
1837 if (defined $dbline{$i}) {
1838 print $OUT "$file:\n" unless $was++;
1839 print $OUT " $i:\t", $dbline[$i];
1840 ($stop,$action) = split(/\0/, $dbline{$i});
1841 print $OUT " break if (", $stop, ")\n"
1842 if $stop and $break_wanted;
1843 print $OUT " action: ", $action, "\n"
1844 if $action and $action_wanted;
1850 if (%postponed and $break_wanted) {
1851 print $OUT "Postponed breakpoints in subroutines:\n";
1853 for $subname (keys %postponed) {
1854 print $OUT " $subname\t$postponed{$subname}\n";
1858 my @have = map { # Combined keys
1859 keys %{$postponed_file{$_}}
1860 } keys %postponed_file;
1861 if (@have and ($break_wanted or $action_wanted)) {
1862 print $OUT "Postponed breakpoints in files:\n";
1864 for $file (keys %postponed_file) {
1865 my $db = $postponed_file{$file};
1866 print $OUT " $file:\n";
1867 for $line (sort {$a <=> $b} keys %$db) {
1868 print $OUT " $line:\n";
1869 my ($stop,$action) = split(/\0/, $$db{$line});
1870 print $OUT " break if (", $stop, ")\n"
1871 if $stop and $break_wanted;
1872 print $OUT " action: ", $action, "\n"
1873 if $action and $action_wanted;
1879 if (%break_on_load and $break_wanted) {
1880 print $OUT "Breakpoints on load:\n";
1882 for $file (keys %break_on_load) {
1883 print $OUT " $file\n";
1887 if ($watch_wanted) {
1889 print $OUT "Watch-expressions:\n" if @to_watch;
1890 for my $expr (@to_watch) {
1891 print $OUT " $expr\n";
1903 my $opt = shift || ''; # opt[=val]
1904 if ($opt =~ /^(\S.*)/) {
1914 print $OUT "The old O command is now the o command.\n"; # hint
1915 print $OUT "Use 'h' to get current command help synopsis or\n"; #
1916 print $OUT "use 'o CommandSet=pre580' to revert to old usage\n"; #
1922 if ($line =~ /^(\d*)$/) {
1923 $incr = $window - 1;
1926 $line = $start . '-' . ($start + $incr);
1932 my $expr = shift || '';
1933 if ($expr =~ /^(\S.*)/) {
1934 push @to_watch, $expr;
1937 $val = (defined $val) ? "'$val'" : 'undef' ;
1938 push @old_watch, $val;
1941 print $OUT "Adding a watch-expression requires an expression\n"; # hint
1946 my $expr = shift || '';
1949 print $OUT "Deleting all watch expressions ...\n";
1950 @to_watch = @old_watch = ();
1951 } elsif ($expr =~ /^(\S.*)/) {
1953 foreach (@to_watch) {
1954 my $val = $to_watch[$i_cnt];
1955 if ($val eq $expr) { # =~ m/^\Q$i$/) {
1956 splice(@to_watch, $i_cnt, 1);
1961 print $OUT "Deleting a watch-expression requires an expression, or '*' for all\n"; # hint
1965 ### END of the API section
1968 @saved = ($@, $!, $^E, $,, $/, $\, $^W);
1969 $, = ""; $/ = "\n"; $\ = ""; $^W = 0;
1972 sub print_lineinfo {
1973 resetterm(1) if $LINEINFO eq $OUT and $term_pid != $$;
1979 # The following takes its argument via $evalarg to preserve current @_
1982 my $subname = shift;
1983 if ($postponed{$subname} =~ s/^break\s([+-]?\d+)\s+if\s//) {
1984 my $offset = $1 || 0;
1985 # Filename below can contain ':'
1986 my ($file,$i) = (find_sub($subname) =~ /^(.*):(\d+)-.*$/);
1989 local *dbline = $main::{'_<' . $file};
1990 local $^W = 0; # != 0 is magical below
1991 $had_breakpoints{$file} |= 1;
1993 ++$i until $dbline[$i] != 0 or $i >= $max;
1994 $dbline{$i} = delete $postponed{$subname};
1997 print $OUT "Subroutine $subname not found.\n";
2001 elsif ($postponed{$subname} eq 'compile') { $signal = 1 }
2002 #print $OUT "In postponed_sub for `$subname'.\n";
2006 if ($ImmediateStop) {
2010 return &postponed_sub
2011 unless ref \$_[0] eq 'GLOB'; # A subroutine is compiled.
2012 # Cannot be done before the file is compiled
2013 local *dbline = shift;
2014 my $filename = $dbline;
2015 $filename =~ s/^_<//;
2017 $signal = 1, print $OUT "'$filename' loaded...\n"
2018 if $break_on_load{$filename};
2019 print_lineinfo(' ' x $stack_depth, "Package $filename.\n") if $frame;
2020 return unless $postponed_file{$filename};
2021 $had_breakpoints{$filename} |= 1;
2022 #%dbline = %{$postponed_file{$filename}}; # Cannot be done: unsufficient magic
2024 for $key (keys %{$postponed_file{$filename}}) {
2025 $dbline{$key} = ${$postponed_file{$filename}}{$key};
2027 delete $postponed_file{$filename};
2031 local ($savout) = select(shift);
2032 my $osingle = $single;
2033 my $otrace = $trace;
2034 $single = $trace = 0;
2037 unless (defined &main::dumpValue) {
2040 if (defined &main::dumpValue) {
2045 my $maxdepth = shift || $option{dumpDepth};
2046 $maxdepth = -1 unless defined $maxdepth; # -1 means infinite depth
2047 &main::dumpValue($v, $maxdepth);
2050 print $OUT "dumpvar.pl not available.\n";
2057 # Tied method do not create a context, so may get wrong message:
2062 resetterm(1) if $fh eq $LINEINFO and $LINEINFO eq $OUT and $term_pid != $$;
2063 my @sub = dump_trace($_[0] + 1, $_[1]);
2064 my $short = $_[2]; # Print short report, next one for sub name
2066 for ($i=0; $i <= $#sub; $i++) {
2069 my $args = defined $sub[$i]{args}
2070 ? "(@{ $sub[$i]{args} })"
2072 $args = (substr $args, 0, $maxtrace - 3) . '...'
2073 if length $args > $maxtrace;
2074 my $file = $sub[$i]{file};
2075 $file = $file eq '-e' ? $file : "file `$file'" unless $short;
2077 $s = (substr $s, 0, $maxtrace - 3) . '...' if length $s > $maxtrace;
2079 my $sub = @_ >= 4 ? $_[3] : $s;
2080 print $fh "$sub[$i]{context}=$sub$args from $file:$sub[$i]{line}\n";
2082 print $fh "$sub[$i]{context} = $s$args" .
2083 " called from $file" .
2084 " line $sub[$i]{line}\n";
2091 my $count = shift || 1e9;
2094 my ($p,$file,$line,$sub,$h,$args,$e,$r,@a,@sub,$context);
2095 my $nothard = not $frame & 8;
2096 local $frame = 0; # Do not want to trace this.
2097 my $otrace = $trace;
2100 $i < $count and ($p,$file,$line,$sub,$h,$context,$e,$r) = caller($i);
2105 if (not defined $arg) {
2107 } elsif ($nothard and tied $arg) {
2109 } elsif ($nothard and $type = ref $arg) {
2110 push @a, "ref($type)";
2112 local $_ = "$arg"; # Safe to stringify now - should not call f().
2115 unless /^(?: -?[\d.]+ | \*[\w:]* )$/x;
2116 s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg;
2117 s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg;
2121 $context = $context ? '@' : (defined $context ? "\$" : '.');
2122 $args = $h ? [@a] : undef;
2123 $e =~ s/\n\s*\;\s*\Z// if $e;
2124 $e =~ s/([\\\'])/\\$1/g if $e;
2126 $sub = "require '$e'";
2127 } elsif (defined $r) {
2129 } elsif ($sub eq '(eval)') {
2130 $sub = "eval {...}";
2132 push(@sub, {context => $context, sub => $sub, args => $args,
2133 file => $file, line => $line});
2142 while ($action =~ s/\\$//) {
2151 # i hate using globals!
2152 $balanced_brace_re ||= qr{
2155 (?> [^{}] + ) # Non-parens without backtracking
2157 (??{ $balanced_brace_re }) # Group with matching parens
2161 return $_[0] !~ m/$balanced_brace_re/;
2165 &readline("cont: ");
2169 # We save, change, then restore STDIN and STDOUT to avoid fork() since
2170 # some non-Unix systems can do system() but have problems with fork().
2171 open(SAVEIN,"<&STDIN") || &warn("Can't save STDIN");
2172 open(SAVEOUT,">&STDOUT") || &warn("Can't save STDOUT");
2173 open(STDIN,"<&IN") || &warn("Can't redirect STDIN");
2174 open(STDOUT,">&OUT") || &warn("Can't redirect STDOUT");
2176 # XXX: using csh or tcsh destroys sigint retvals!
2178 open(STDIN,"<&SAVEIN") || &warn("Can't restore STDIN");
2179 open(STDOUT,">&SAVEOUT") || &warn("Can't restore STDOUT");
2184 # most of the $? crud was coping with broken cshisms
2186 &warn("(Command exited ", ($? >> 8), ")\n");
2188 &warn( "(Command died of SIG#", ($? & 127),
2189 (($? & 128) ? " -- core dumped" : "") , ")", "\n");
2199 eval { require Term::ReadLine } or die $@;
2202 my ($i, $o) = split $tty, /,/;
2203 $o = $i unless defined $o;
2204 open(IN,"<$i") or die "Cannot open TTY `$i' for read: $!";
2205 open(OUT,">$o") or die "Cannot open TTY `$o' for write: $!";
2208 my $sel = select($OUT);
2212 eval "require Term::Rendezvous;" or die;
2213 my $rv = $ENV{PERLDB_NOTTY} || "/tmp/perldbtty$$";
2214 my $term_rv = new Term::Rendezvous $rv;
2216 $OUT = $term_rv->OUT;
2219 if ($term_pid eq '-1') { # In a TTY with another debugger
2223 $term = new Term::ReadLine::Stub 'perldb', $IN, $OUT;
2225 $term = new Term::ReadLine 'perldb', $IN, $OUT;
2227 $rl_attribs = $term->Attribs;
2228 $rl_attribs->{basic_word_break_characters} .= '-:+/*,[])}'
2229 if defined $rl_attribs->{basic_word_break_characters}
2230 and index($rl_attribs->{basic_word_break_characters}, ":") == -1;
2231 $rl_attribs->{special_prefixes} = '$@&%';
2232 $rl_attribs->{completer_word_break_characters} .= '$@&%';
2233 $rl_attribs->{completion_function} = \&db_complete;
2235 $LINEINFO = $OUT unless defined $LINEINFO;
2236 $lineinfo = $console unless defined $lineinfo;
2238 if ($term->Features->{setHistory} and "@hist" ne "?") {
2239 $term->SetHistory(@hist);
2241 ornaments($ornaments) if defined $ornaments;
2245 # Example get_fork_TTY functions
2246 sub xterm_get_fork_TTY {
2247 (my $name = $0) =~ s,^.*[/\\],,s;
2248 open XT, qq[3>&1 xterm -title "Daughter Perl debugger $pids $name" -e sh -c 'tty 1>&3;\
2252 $pidprompt = ''; # Shown anyway in titlebar
2256 # This example function resets $IN, $OUT itself
2257 sub os2_get_fork_TTY {
2258 local $^F = 40; # XXXX Fixme!
2260 my ($in1, $out1, $in2, $out2);
2261 # Having -d in PERL5OPT would lead to a disaster...
2262 local $ENV{PERL5OPT} = $ENV{PERL5OPT} if $ENV{PERL5OPT};
2263 $ENV{PERL5OPT} =~ s/(?:^|(?<=\s))-d\b// if $ENV{PERL5OPT};
2264 $ENV{PERL5OPT} =~ s/(?:^|(?<=\s))-d\B/-/ if $ENV{PERL5OPT};
2265 print $OUT "Making kid PERL5OPT->`$ENV{PERL5OPT}'.\n" if $ENV{PERL5OPT};
2266 local $ENV{PERL5LIB} = $ENV{PERL5LIB} ? $ENV{PERL5LIB} : $ENV{PERLLIB};
2267 $ENV{PERL5LIB} = '' unless defined $ENV{PERL5LIB};
2268 $ENV{PERL5LIB} = join ';', @ini_INC, split /;/, $ENV{PERL5LIB};
2269 (my $name = $0) =~ s,^.*[/\\],,s;
2271 if ( pipe $in1, $out1 and pipe $in2, $out2
2272 # system P_SESSION will fail if there is another process
2273 # in the same session with a "dependent" asynchronous child session.
2274 and @args = ($rl, fileno $in1, fileno $out2,
2275 "Daughter Perl debugger $pids $name") and
2276 (($kpid = CORE::system 4, $^X, '-we', <<'ES', @args) >= 0 # P_SESSION
2277 END {sleep 5 unless $loaded}
2278 BEGIN {open STDIN, '</dev/con' or warn "reopen stdin: $!"}
2281 my ($rl, $in) = (shift, shift); # Read from $in and pass through
2283 system P_NOWAIT, $^X, '-we', <<EOS or die "Cannot start a grandkid";
2284 open IN, '<&=$in' or die "open <&=$in: \$!";
2285 \$| = 1; print while sysread IN, \$_, 1<<16;
2289 open OUT, ">&=$out" or die "Cannot open &=$out for writing: $!";
2291 require Term::ReadKey if $rl;
2292 Term::ReadKey::ReadMode(4) if $rl; # Nodelay on kbd. Pipe is automatically nodelay...
2293 print while sysread STDIN, $_, 1<<($rl ? 16 : 0);
2295 or warn "system P_SESSION: $!, $^E" and 0)
2296 and close $in1 and close $out2 ) {
2297 $pidprompt = ''; # Shown anyway in titlebar
2298 reset_IN_OUT($in2, $out1);
2300 return ''; # Indicate that reset_IN_OUT is called
2305 sub create_IN_OUT { # Create a window with IN/OUT handles redirected there
2306 my $in = &get_fork_TTY if defined &get_fork_TTY;
2307 $in = $fork_TTY if defined $fork_TTY; # Backward compatibility
2308 if (not defined $in) {
2310 print_help(<<EOP) if $why == 1;
2311 I<#########> Forked, but do not know how to create a new B<TTY>. I<#########>
2313 print_help(<<EOP) if $why == 2;
2314 I<#########> Daughter session, do not know how to change a B<TTY>. I<#########>
2315 This may be an asynchronous session, so the parent debugger may be active.
2317 print_help(<<EOP) if $why != 4;
2318 Since two debuggers fight for the same TTY, input is severely entangled.
2322 I know how to switch the output to a different window in xterms
2323 and OS/2 consoles only. For a manual switch, put the name of the created I<TTY>
2324 in B<\$DB::fork_TTY>, or define a function B<DB::get_fork_TTY()> returning this.
2326 On I<UNIX>-like systems one can get the name of a I<TTY> for the given window
2327 by typing B<tty>, and disconnect the I<shell> from I<TTY> by B<sleep 1000000>.
2330 } elsif ($in ne '') {
2333 $console = ''; # Indicate no need to open-from-the-console
2338 sub resetterm { # We forked, so we need a different TTY
2340 my $systemed = $in > 1 ? '-' : '';
2342 $pids =~ s/\]/$systemed->$$]/;
2344 $pids = "[$term_pid->$$]";
2348 return unless $CreateTTY & $in;
2355 my $left = @typeahead;
2356 my $got = shift @typeahead;
2358 print $OUT "auto(-$left)", shift, $got, "\n";
2359 $term->AddHistory($got)
2360 if length($got) > 1 and defined $term->Features->{addHistory};
2366 my $line = CORE::readline($cmdfhs[-1]);
2367 defined $line ? (print $OUT ">> $line" and return $line)
2368 : close pop @cmdfhs;
2370 if (ref $OUT and UNIVERSAL::isa($OUT, 'IO::Socket::INET')) {
2371 $OUT->write(join('', @_));
2373 $IN->recv( $stuff, 2048 ); # XXX: what's wrong with sysread?
2377 $term->readline(@_);
2382 my ($opt, $val)= @_;
2383 $val = option_val($opt,'N/A');
2384 $val =~ s/([\\\'])/\\$1/g;
2385 printf $OUT "%20s = '%s'\n", $opt, $val;
2389 my ($opt, $default)= @_;
2391 if (defined $optionVars{$opt}
2392 and defined ${$optionVars{$opt}}) {
2393 $val = ${$optionVars{$opt}};
2394 } elsif (defined $optionAction{$opt}
2395 and defined &{$optionAction{$opt}}) {
2396 $val = &{$optionAction{$opt}}();
2397 } elsif (defined $optionAction{$opt}
2398 and not defined $option{$opt}
2399 or defined $optionVars{$opt}
2400 and not defined ${$optionVars{$opt}}) {
2403 $val = $option{$opt};
2405 $val = $default unless defined $val;
2412 # too dangerous to let intuitive usage overwrite important things
2413 # defaultion should never be the default
2414 my %opt_needs_val = map { ( $_ => 1 ) } qw{
2415 dumpDepth arrayDepth hashDepth LineInfo maxTraceLen ornaments windowSize
2416 pager quote ReadLine recallCommand RemotePort ShellBang TTY
2421 s/^(\w+)(\W?)// or print($OUT "Invalid option `$_'\n"), last;
2422 my ($opt,$sep) = ($1,$2);
2425 print($OUT "Option query `$opt?' followed by non-space `$_'\n"), last
2427 #&dump_option($opt);
2428 } elsif ($sep !~ /\S/) {
2430 $val = "1"; # this is an evil default; make 'em set it!
2431 } elsif ($sep eq "=") {
2432 if (s/ (["']) ( (?: \\. | (?! \1 ) [^\\] )* ) \1 //x) {
2434 ($val = $2) =~ s/\\([$quote\\])/$1/g;
2438 print OUT qq(Option better cleared using $opt=""\n)
2442 } else { #{ to "let some poor schmuck bounce on the % key in B<vi>."
2443 my ($end) = "\\" . substr( ")]>}$sep", index("([<{",$sep), 1 ); #}
2444 s/^(([^\\$end]|\\[\\$end])*)$end($|\s+)// or
2445 print($OUT "Unclosed option value `$opt$sep$_'\n"), last;
2446 ($val = $1) =~ s/\\([\\$end])/$1/g;
2450 my $matches = grep( /^\Q$opt/ && ($option = $_), @options )
2451 || grep( /^\Q$opt/i && ($option = $_), @options );
2453 print($OUT "Unknown option `$opt'\n"), next unless $matches;
2454 print($OUT "Ambiguous option `$opt'\n"), next if $matches > 1;
2456 if ($opt_needs_val{$option} && $val_defaulted) {
2457 my $cmd = ($CommandSet eq '580') ? 'o' : 'O';
2458 print $OUT "Option `$opt' is non-boolean. Use `$cmd $option=VAL' to set, `$cmd $option?' to query\n";
2462 $option{$option} = $val if defined $val;
2467 require '$optionRequire{$option}';
2469 } || die # XXX: shouldn't happen
2470 if defined $optionRequire{$option} &&
2473 ${$optionVars{$option}} = $val
2474 if defined $optionVars{$option} &&
2477 &{$optionAction{$option}} ($val)
2478 if defined $optionAction{$option} &&
2479 defined &{$optionAction{$option}} &&
2483 dump_option($option) unless $OUT eq \*STDERR;
2488 my ($stem,@list) = @_;
2490 $ENV{"${stem}_n"} = @list;
2491 for $i (0 .. $#list) {
2493 $val =~ s/\\/\\\\/g;
2494 $val =~ s/([\0-\37\177\200-\377])/"\\0x" . unpack('H2',$1)/eg;
2495 $ENV{"${stem}_$i"} = $val;
2502 my $n = delete $ENV{"${stem}_n"};
2504 for $i (0 .. $n - 1) {
2505 $val = delete $ENV{"${stem}_$i"};
2506 $val =~ s/\\((\\)|0x(..))/ $2 ? $2 : pack('H2', $3) /ge;
2514 return; # Put nothing on the stack - malloc/free land!
2518 my($msg)= join("",@_);
2519 $msg .= ": $!\n" unless $msg =~ /\n$/;
2525 my $switch_li = $LINEINFO eq $OUT;
2526 if ($term and $term->Features->{newTTY}) {
2527 ($IN, $OUT) = (shift, shift);
2528 $term->newTTY($IN, $OUT);
2530 &warn("Too late to set IN/OUT filehandles, enabled on next `R'!\n");
2532 ($IN, $OUT) = (shift, shift);
2534 my $o = select $OUT;
2537 $LINEINFO = $OUT if $switch_li;
2541 if (@_ and $term and $term->Features->{newTTY}) {
2542 my ($in, $out) = shift;
2544 ($in, $out) = split /,/, $in, 2;
2548 open IN, $in or die "cannot open `$in' for read: $!";
2549 open OUT, ">$out" or die "cannot open `$out' for write: $!";
2550 reset_IN_OUT(\*IN,\*OUT);
2553 &warn("Too late to set TTY, enabled on next `R'!\n") if $term and @_;
2554 # Useful if done through PERLDB_OPTS:
2555 $console = $tty = shift if @_;
2561 &warn("Too late to set noTTY, enabled on next `R'!\n") if @_;
2563 $notty = shift if @_;
2569 &warn("Too late to set ReadLine, enabled on next `R'!\n") if @_;
2577 &warn("Too late to set RemotePort, enabled on next 'R'!\n") if @_;
2579 $remoteport = shift if @_;
2584 if (${$term->Features}{tkRunning}) {
2585 return $term->tkRunning(@_);
2588 print $OUT "tkRunning not supported by current ReadLine package.\n";
2595 &warn("Too late to set up NonStop mode, enabled on next `R'!\n") if @_;
2597 $runnonstop = shift if @_;
2604 $pager="|".$pager unless $pager =~ /^(\+?\>|\|)/;
2611 $sh = quotemeta shift;
2612 $sh .= "\\b" if $sh =~ /\w$/;
2616 $psh =~ s/\\(.)/$1/g;
2621 if (defined $term) {
2622 local ($warnLevel,$dieLevel) = (0, 1);
2623 return '' unless $term->Features->{ornaments};
2624 eval { $term->ornaments(@_) } || '';
2632 $rc = quotemeta shift;
2633 $rc .= "\\b" if $rc =~ /\w$/;
2637 $prc =~ s/\\(.)/$1/g;
2642 return $lineinfo unless @_;
2644 my $stream = ($lineinfo =~ /^(\+?\>|\|)/) ? $lineinfo : ">$lineinfo";
2645 $slave_editor = ($stream =~ /^\|/);
2646 open(LINEINFO, "$stream") || &warn("Cannot open `$stream' for write");
2647 $LINEINFO = \*LINEINFO;
2648 my $save = select($LINEINFO);
2654 sub list_modules { # versions
2662 s/^Term::ReadLine::readline$/readline/;
2663 if (defined ${ $_ . '::VERSION' }) {
2664 $version{$file} = "${ $_ . '::VERSION' } from ";
2666 $version{$file} .= $INC{$file};
2668 dumpit($OUT,\%version);
2672 # XXX: make sure there are tabs between the command and explanation,
2673 # or print_help will screw up your formatting if you have
2674 # eeevil ornaments enabled. This is an insane mess.
2677 Help is currently only available for the new 580 CommandSet,
2678 if you really want old behaviour, presumably you know what
2682 B<s> [I<expr>] Single step [in I<expr>].
2683 B<n> [I<expr>] Next, steps over subroutine calls [in I<expr>].
2684 <B<CR>> Repeat last B<n> or B<s> command.
2685 B<r> Return from current subroutine.
2686 B<c> [I<line>|I<sub>] Continue; optionally inserts a one-time-only breakpoint
2687 at the specified position.
2688 B<l> I<min>B<+>I<incr> List I<incr>+1 lines starting at I<min>.
2689 B<l> I<min>B<->I<max> List lines I<min> through I<max>.
2690 B<l> I<line> List single I<line>.
2691 B<l> I<subname> List first window of lines from subroutine.
2692 B<l> I<\$var> List first window of lines from subroutine referenced by I<\$var>.
2693 B<l> List next window of lines.
2694 B<-> List previous window of lines.
2695 B<v> [I<line>] View window around I<line>.
2696 B<.> Return to the executed line.
2697 B<f> I<filename> Switch to viewing I<filename>. File must be already loaded.
2698 I<filename> may be either the full name of the file, or a regular
2699 expression matching the full file name:
2700 B<f> I</home/me/foo.pl> and B<f> I<oo\\.> may access the same file.
2701 Evals (with saved bodies) are considered to be filenames:
2702 B<f> I<(eval 7)> and B<f> I<eval 7\\b> access the body of the 7th eval
2703 (in the order of execution).
2704 B</>I<pattern>B</> Search forwards for I<pattern>; final B</> is optional.
2705 B<?>I<pattern>B<?> Search backwards for I<pattern>; final B<?> is optional.
2706 B<L> [I<a|b|w>] List actions and or breakpoints and or watch-expressions.
2707 B<S> [[B<!>]I<pattern>] List subroutine names [not] matching I<pattern>.
2708 B<t> Toggle trace mode.
2709 B<t> I<expr> Trace through execution of I<expr>.
2710 B<b> Sets breakpoint on current line)
2711 B<b> [I<line>] [I<condition>]
2712 Set breakpoint; I<line> defaults to the current execution line;
2713 I<condition> breaks if it evaluates to true, defaults to '1'.
2714 B<b> I<subname> [I<condition>]
2715 Set breakpoint at first line of subroutine.
2716 B<b> I<\$var> Set breakpoint at first line of subroutine referenced by I<\$var>.
2717 B<b> B<load> I<filename> Set breakpoint on 'require'ing the given file.
2718 B<b> B<postpone> I<subname> [I<condition>]
2719 Set breakpoint at first line of subroutine after
2721 B<b> B<compile> I<subname>
2722 Stop after the subroutine is compiled.
2723 B<B> [I<line>] Delete the breakpoint for I<line>.
2724 B<B> I<*> Delete all breakpoints.
2725 B<a> [I<line>] I<command>
2726 Set an action to be done before the I<line> is executed;
2727 I<line> defaults to the current execution line.
2728 Sequence is: check for breakpoint/watchpoint, print line
2729 if necessary, do action, prompt user if necessary,
2732 B<A> [I<line>] Delete the action for I<line>.
2733 B<A> I<*> Delete all actions.
2734 B<w> I<expr> Add a global watch-expression.
2736 B<W> I<expr> Delete a global watch-expression.
2737 B<W> I<*> Delete all watch-expressions.
2738 B<V> [I<pkg> [I<vars>]] List some (default all) variables in package (default current).
2739 Use B<~>I<pattern> and B<!>I<pattern> for positive and negative regexps.
2740 B<X> [I<vars>] Same as \"B<V> I<currentpackage> [I<vars>]\".
2741 B<y> [I<n> [I<Vars>]] List lexicals in higher scope <n>. Vars same as B<V>.
2742 B<x> I<expr> Evals expression in list context, dumps the result.
2743 B<m> I<expr> Evals expression in list context, prints methods callable
2744 on the first element of the result.
2745 B<m> I<class> Prints methods callable via the given class.
2746 B<M> Show versions of loaded modules.
2748 B<<> ? List Perl commands to run before each prompt.
2749 B<<> I<expr> Define Perl command to run before each prompt.
2750 B<<<> I<expr> Add to the list of Perl commands to run before each prompt.
2751 B<>> ? List Perl commands to run after each prompt.
2752 B<>> I<expr> Define Perl command to run after each prompt.
2753 B<>>B<>> I<expr> Add to the list of Perl commands to run after each prompt.
2754 B<{> I<db_command> Define debugger command to run before each prompt.
2755 B<{> ? List debugger commands to run before each prompt.
2756 B<{{> I<db_command> Add to the list of debugger commands to run before each prompt.
2757 B<$prc> I<number> Redo a previous command (default previous command).
2758 B<$prc> I<-number> Redo number'th-to-last command.
2759 B<$prc> I<pattern> Redo last command that started with I<pattern>.
2760 See 'B<O> I<recallCommand>' too.
2761 B<$psh$psh> I<cmd> Run cmd in a subprocess (reads from DB::IN, writes to DB::OUT)"
2762 . ( $rc eq $sh ? "" : "
2763 B<$psh> [I<cmd>] Run I<cmd> in subshell (forces \"\$SHELL -c 'cmd'\")." ) . "
2764 See 'B<O> I<shellBang>' too.
2765 B<source> I<file> Execute I<file> containing debugger commands (may nest).
2766 B<H> I<-number> Display last number commands (default all).
2767 B<p> I<expr> Same as \"I<print {DB::OUT} expr>\" in current package.
2768 B<|>I<dbcmd> Run debugger command, piping DB::OUT to current pager.
2769 B<||>I<dbcmd> Same as B<|>I<dbcmd> but DB::OUT is temporarilly select()ed as well.
2770 B<\=> [I<alias> I<value>] Define a command alias, or list current aliases.
2771 I<command> Execute as a perl statement in current package.
2772 B<R> Pure-man-restart of debugger, some of debugger state
2773 and command-line options may be lost.
2774 Currently the following settings are preserved:
2775 history, breakpoints and actions, debugger B<O>ptions
2776 and the following command-line options: I<-w>, I<-I>, I<-e>.
2778 B<o> [I<opt>] ... Set boolean option to true
2779 B<o> [I<opt>B<?>] Query options
2780 B<o> [I<opt>B<=>I<val>] [I<opt>=B<\">I<val>B<\">] ...
2781 Set options. Use quotes in spaces in value.
2782 I<recallCommand>, I<ShellBang> chars used to recall command or spawn shell;
2783 I<pager> program for output of \"|cmd\";
2784 I<tkRunning> run Tk while prompting (with ReadLine);
2785 I<signalLevel> I<warnLevel> I<dieLevel> level of verbosity;
2786 I<inhibit_exit> Allows stepping off the end of the script.
2787 I<ImmediateStop> Debugger should stop as early as possible.
2788 I<RemotePort> Remote hostname:port for remote debugging
2789 The following options affect what happens with B<V>, B<X>, and B<x> commands:
2790 I<arrayDepth>, I<hashDepth> print only first N elements ('' for all);
2791 I<compactDump>, I<veryCompact> change style of array and hash dump;
2792 I<globPrint> whether to print contents of globs;
2793 I<DumpDBFiles> dump arrays holding debugged files;
2794 I<DumpPackages> dump symbol tables of packages;
2795 I<DumpReused> dump contents of \"reused\" addresses;
2796 I<quote>, I<HighBit>, I<undefPrint> change style of string dump;
2797 I<bareStringify> Do not print the overload-stringified value;
2798 Other options include:
2799 I<PrintRet> affects printing of return value after B<r> command,
2800 I<frame> affects printing messages on subroutine entry/exit.
2801 I<AutoTrace> affects printing messages on possible breaking points.
2802 I<maxTraceLen> gives max length of evals/args listed in stack trace.
2803 I<ornaments> affects screen appearance of the command line.
2804 I<CreateTTY> bits control attempts to create a new TTY on events:
2805 1: on fork() 2: debugger is started inside debugger
2807 During startup options are initialized from \$ENV{PERLDB_OPTS}.
2808 You can put additional initialization options I<TTY>, I<noTTY>,
2809 I<ReadLine>, I<NonStop>, and I<RemotePort> there (or use
2810 `B<R>' after you set them).
2812 B<q> or B<^D> Quit. Set B<\$DB::finished = 0> to debug global destruction.
2813 B<h> Summary of debugger commands.
2814 B<h> [I<db_command>] Get help [on a specific debugger command], enter B<|h> to page.
2815 B<h h> Long help for debugger commands
2816 B<$doccmd> I<manpage> Runs the external doc viewer B<$doccmd> command on the
2817 named Perl I<manpage>, or on B<$doccmd> itself if omitted.
2818 Set B<\$DB::doccmd> to change viewer.
2820 Type `|h h' for a paged display if this was too hard to read.
2822 "; # Fix balance of vi % matching: }}}}
2824 # note: tabs in the following section are not-so-helpful
2825 $summary = <<"END_SUM";
2826 I<List/search source lines:> I<Control script execution:>
2827 B<l> [I<ln>|I<sub>] List source code B<T> Stack trace
2828 B<-> or B<.> List previous/current line B<s> [I<expr>] Single step [in expr]
2829 B<v> [I<line>] View around line B<n> [I<expr>] Next, steps over subs
2830 B<f> I<filename> View source in file <B<CR>/B<Enter>> Repeat last B<n> or B<s>
2831 B</>I<pattern>B</> B<?>I<patt>B<?> Search forw/backw B<r> Return from subroutine
2832 B<M> Show module versions B<c> [I<ln>|I<sub>] Continue until position
2833 I<Debugger controls:> B<L> List break/watch/actions
2834 B<o> [...] Set debugger options B<t> [I<expr>] Toggle trace [trace expr]
2835 B<<>[B<<>]|B<{>[B<{>]|B<>>[B<>>] [I<cmd>] Do pre/post-prompt B<b> [I<ln>|I<event>|I<sub>] [I<cnd>] Set breakpoint
2836 B<$prc> [I<N>|I<pat>] Redo a previous command B<B> I<ln|*> Delete a/all breakpoints
2837 B<H> [I<-num>] Display last num commands B<a> [I<ln>] I<cmd> Do cmd before line
2838 B<=> [I<a> I<val>] Define/list an alias B<A> I<ln|*> Delete a/all actions
2839 B<h> [I<db_cmd>] Get help on command B<w> I<expr> Add a watch expression
2840 B<h h> Complete help page B<W> I<expr|*> Delete a/all watch exprs
2841 B<|>[B<|>]I<db_cmd> Send output to pager B<$psh>\[B<$psh>\] I<syscmd> Run cmd in a subprocess
2842 B<q> or B<^D> Quit B<R> Attempt a restart
2843 I<Data Examination:> B<expr> Execute perl code, also see: B<s>,B<n>,B<t> I<expr>
2844 B<x>|B<m> I<expr> Evals expr in list context, dumps the result or lists methods.
2845 B<p> I<expr> Print expression (uses script's current package).
2846 B<S> [[B<!>]I<pat>] List subroutine names [not] matching pattern
2847 B<V> [I<Pk> [I<Vars>]] List Variables in Package. Vars can be ~pattern or !pattern.
2848 B<X> [I<Vars>] Same as \"B<V> I<current_package> [I<Vars>]\".
2849 B<y> [I<n> [I<Vars>]] List lexicals in higher scope <n>. Vars same as B<V>.
2850 For more help, type B<h> I<cmd_letter>, or run B<$doccmd perldebug> for all docs.
2852 # ')}}; # Fix balance of vi % matching
2854 # and this is really numb...
2857 B<s> [I<expr>] Single step [in I<expr>].
2858 B<n> [I<expr>] Next, steps over subroutine calls [in I<expr>].
2859 <B<CR>> Repeat last B<n> or B<s> command.
2860 B<r> Return from current subroutine.
2861 B<c> [I<line>|I<sub>] Continue; optionally inserts a one-time-only breakpoint
2862 at the specified position.
2863 B<l> I<min>B<+>I<incr> List I<incr>+1 lines starting at I<min>.
2864 B<l> I<min>B<->I<max> List lines I<min> through I<max>.
2865 B<l> I<line> List single I<line>.
2866 B<l> I<subname> List first window of lines from subroutine.
2867 B<l> I<\$var> List first window of lines from subroutine referenced by I<\$var>.
2868 B<l> List next window of lines.
2869 B<-> List previous window of lines.
2870 B<w> [I<line>] List window around I<line>.
2871 B<.> Return to the executed line.
2872 B<f> I<filename> Switch to viewing I<filename>. File must be already loaded.
2873 I<filename> may be either the full name of the file, or a regular
2874 expression matching the full file name:
2875 B<f> I</home/me/foo.pl> and B<f> I<oo\\.> may access the same file.
2876 Evals (with saved bodies) are considered to be filenames:
2877 B<f> I<(eval 7)> and B<f> I<eval 7\\b> access the body of the 7th eval
2878 (in the order of execution).
2879 B</>I<pattern>B</> Search forwards for I<pattern>; final B</> is optional.
2880 B<?>I<pattern>B<?> Search backwards for I<pattern>; final B<?> is optional.
2881 B<L> List all breakpoints and actions.
2882 B<S> [[B<!>]I<pattern>] List subroutine names [not] matching I<pattern>.
2883 B<t> Toggle trace mode.
2884 B<t> I<expr> Trace through execution of I<expr>.
2885 B<b> [I<line>] [I<condition>]
2886 Set breakpoint; I<line> defaults to the current execution line;
2887 I<condition> breaks if it evaluates to true, defaults to '1'.
2888 B<b> I<subname> [I<condition>]
2889 Set breakpoint at first line of subroutine.
2890 B<b> I<\$var> Set breakpoint at first line of subroutine referenced by I<\$var>.
2891 B<b> B<load> I<filename> Set breakpoint on `require'ing the given file.
2892 B<b> B<postpone> I<subname> [I<condition>]
2893 Set breakpoint at first line of subroutine after
2895 B<b> B<compile> I<subname>
2896 Stop after the subroutine is compiled.
2897 B<d> [I<line>] Delete the breakpoint for I<line>.
2898 B<D> Delete all breakpoints.
2899 B<a> [I<line>] I<command>
2900 Set an action to be done before the I<line> is executed;
2901 I<line> defaults to the current execution line.
2902 Sequence is: check for breakpoint/watchpoint, print line
2903 if necessary, do action, prompt user if necessary,
2905 B<a> [I<line>] Delete the action for I<line>.
2906 B<A> Delete all actions.
2907 B<W> I<expr> Add a global watch-expression.
2908 B<W> Delete all watch-expressions.
2909 B<V> [I<pkg> [I<vars>]] List some (default all) variables in package (default current).
2910 Use B<~>I<pattern> and B<!>I<pattern> for positive and negative regexps.
2911 B<X> [I<vars>] Same as \"B<V> I<currentpackage> [I<vars>]\".
2912 B<x> I<expr> Evals expression in list context, dumps the result.
2913 B<m> I<expr> Evals expression in list context, prints methods callable
2914 on the first element of the result.
2915 B<m> I<class> Prints methods callable via the given class.
2917 B<<> ? List Perl commands to run before each prompt.
2918 B<<> I<expr> Define Perl command to run before each prompt.
2919 B<<<> I<expr> Add to the list of Perl commands to run before each prompt.
2920 B<>> ? List Perl commands to run after each prompt.
2921 B<>> I<expr> Define Perl command to run after each prompt.
2922 B<>>B<>> I<expr> Add to the list of Perl commands to run after each prompt.
2923 B<{> I<db_command> Define debugger command to run before each prompt.
2924 B<{> ? List debugger commands to run before each prompt.
2925 B<{{> I<db_command> Add to the list of debugger commands to run before each prompt.
2926 B<$prc> I<number> Redo a previous command (default previous command).
2927 B<$prc> I<-number> Redo number'th-to-last command.
2928 B<$prc> I<pattern> Redo last command that started with I<pattern>.
2929 See 'B<O> I<recallCommand>' too.
2930 B<$psh$psh> I<cmd> Run cmd in a subprocess (reads from DB::IN, writes to DB::OUT)"
2931 . ( $rc eq $sh ? "" : "
2932 B<$psh> [I<cmd>] Run I<cmd> in subshell (forces \"\$SHELL -c 'cmd'\")." ) . "
2933 See 'B<O> I<shellBang>' too.
2934 B<source> I<file> Execute I<file> containing debugger commands (may nest).
2935 B<H> I<-number> Display last number commands (default all).
2936 B<p> I<expr> Same as \"I<print {DB::OUT} expr>\" in current package.
2937 B<|>I<dbcmd> Run debugger command, piping DB::OUT to current pager.
2938 B<||>I<dbcmd> Same as B<|>I<dbcmd> but DB::OUT is temporarilly select()ed as well.
2939 B<\=> [I<alias> I<value>] Define a command alias, or list current aliases.
2940 I<command> Execute as a perl statement in current package.
2941 B<v> Show versions of loaded modules.
2942 B<R> Pure-man-restart of debugger, some of debugger state
2943 and command-line options may be lost.
2944 Currently the following settings are preserved:
2945 history, breakpoints and actions, debugger B<O>ptions
2946 and the following command-line options: I<-w>, I<-I>, I<-e>.
2948 B<O> [I<opt>] ... Set boolean option to true
2949 B<O> [I<opt>B<?>] Query options
2950 B<O> [I<opt>B<=>I<val>] [I<opt>=B<\">I<val>B<\">] ...
2951 Set options. Use quotes in spaces in value.
2952 I<recallCommand>, I<ShellBang> chars used to recall command or spawn shell;
2953 I<pager> program for output of \"|cmd\";
2954 I<tkRunning> run Tk while prompting (with ReadLine);
2955 I<signalLevel> I<warnLevel> I<dieLevel> level of verbosity;
2956 I<inhibit_exit> Allows stepping off the end of the script.
2957 I<ImmediateStop> Debugger should stop as early as possible.
2958 I<RemotePort> Remote hostname:port for remote debugging
2959 The following options affect what happens with B<V>, B<X>, and B<x> commands:
2960 I<arrayDepth>, I<hashDepth> print only first N elements ('' for all);
2961 I<compactDump>, I<veryCompact> change style of array and hash dump;
2962 I<globPrint> whether to print contents of globs;
2963 I<DumpDBFiles> dump arrays holding debugged files;
2964 I<DumpPackages> dump symbol tables of packages;
2965 I<DumpReused> dump contents of \"reused\" addresses;
2966 I<quote>, I<HighBit>, I<undefPrint> change style of string dump;
2967 I<bareStringify> Do not print the overload-stringified value;
2968 Other options include:
2969 I<PrintRet> affects printing of return value after B<r> command,
2970 I<frame> affects printing messages on subroutine entry/exit.
2971 I<AutoTrace> affects printing messages on possible breaking points.
2972 I<maxTraceLen> gives max length of evals/args listed in stack trace.
2973 I<ornaments> affects screen appearance of the command line.
2974 I<CreateTTY> bits control attempts to create a new TTY on events:
2975 1: on fork() 2: debugger is started inside debugger
2977 During startup options are initialized from \$ENV{PERLDB_OPTS}.
2978 You can put additional initialization options I<TTY>, I<noTTY>,
2979 I<ReadLine>, I<NonStop>, and I<RemotePort> there (or use
2980 `B<R>' after you set them).
2982 B<q> or B<^D> Quit. Set B<\$DB::finished = 0> to debug global destruction.
2983 B<h> [I<db_command>] Get help [on a specific debugger command], enter B<|h> to page.
2984 B<h h> Summary of debugger commands.
2985 B<$doccmd> I<manpage> Runs the external doc viewer B<$doccmd> command on the
2986 named Perl I<manpage>, or on B<$doccmd> itself if omitted.
2987 Set B<\$DB::doccmd> to change viewer.
2989 Type `|h' for a paged display if this was too hard to read.
2991 "; # Fix balance of vi % matching: }}}}
2993 # note: tabs in the following section are not-so-helpful
2994 $pre580_summary = <<"END_SUM";
2995 I<List/search source lines:> I<Control script execution:>
2996 B<l> [I<ln>|I<sub>] List source code B<T> Stack trace
2997 B<-> or B<.> List previous/current line B<s> [I<expr>] Single step [in expr]
2998 B<w> [I<line>] List around line B<n> [I<expr>] Next, steps over subs
2999 B<f> I<filename> View source in file <B<CR>/B<Enter>> Repeat last B<n> or B<s>
3000 B</>I<pattern>B</> B<?>I<patt>B<?> Search forw/backw B<r> Return from subroutine
3001 B<v> Show versions of modules B<c> [I<ln>|I<sub>] Continue until position
3002 I<Debugger controls:> B<L> List break/watch/actions
3003 B<O> [...] Set debugger options B<t> [I<expr>] Toggle trace [trace expr]
3004 B<<>[B<<>]|B<{>[B<{>]|B<>>[B<>>] [I<cmd>] Do pre/post-prompt B<b> [I<ln>|I<event>|I<sub>] [I<cnd>] Set breakpoint
3005 B<$prc> [I<N>|I<pat>] Redo a previous command B<d> [I<ln>] or B<D> Delete a/all breakpoints
3006 B<H> [I<-num>] Display last num commands B<a> [I<ln>] I<cmd> Do cmd before line
3007 B<=> [I<a> I<val>] Define/list an alias B<W> I<expr> Add a watch expression
3008 B<h> [I<db_cmd>] Get help on command B<A> or B<W> Delete all actions/watch
3009 B<|>[B<|>]I<db_cmd> Send output to pager B<$psh>\[B<$psh>\] I<syscmd> Run cmd in a subprocess
3010 B<q> or B<^D> Quit B<R> Attempt a restart
3011 I<Data Examination:> B<expr> Execute perl code, also see: B<s>,B<n>,B<t> I<expr>
3012 B<x>|B<m> I<expr> Evals expr in list context, dumps the result or lists methods.
3013 B<p> I<expr> Print expression (uses script's current package).
3014 B<S> [[B<!>]I<pat>] List subroutine names [not] matching pattern
3015 B<V> [I<Pk> [I<Vars>]] List Variables in Package. Vars can be ~pattern or !pattern.
3016 B<X> [I<Vars>] Same as \"B<V> I<current_package> [I<Vars>]\".
3017 B<y> [I<n> [I<Vars>]] List lexicals in higher scope <n>. Vars same as B<V>.
3018 For more help, type B<h> I<cmd_letter>, or run B<$doccmd perldebug> for all docs.
3020 # ')}}; # Fix balance of vi % matching
3027 # Restore proper alignment destroyed by eeevil I<> and B<>
3028 # ornaments: A pox on both their houses!
3030 # A help command will have everything up to and including
3031 # the first tab sequence padded into a field 16 (or if indented 20)
3032 # wide. If it's wider than that, an extra space will be added.
3034 ^ # only matters at start of line
3035 ( \040{4} | \t )* # some subcommands are indented
3036 ( < ? # so <CR> works
3037 [BI] < [^\t\n] + ) # find an eeevil ornament
3038 ( \t+ ) # original separation, discarded
3039 ( .* ) # this will now start (no earlier) than
3042 my($leadwhite, $command, $midwhite, $text) = ($1, $2, $3, $4);
3043 my $clean = $command;
3044 $clean =~ s/[BI]<([^>]*)>/$1/g;
3045 # replace with this whole string:
3046 ($leadwhite ? " " x 4 : "")
3048 . ((" " x (16 + ($leadwhite ? 4 : 0) - length($clean))) || " ")
3053 s{ # handle bold ornaments
3054 B < ( [^>] + | > ) >
3056 $Term::ReadLine::TermCap::rl_term_set[2]
3058 . $Term::ReadLine::TermCap::rl_term_set[3]
3061 s{ # handle italic ornaments
3062 I < ( [^>] + | > ) >
3064 $Term::ReadLine::TermCap::rl_term_set[0]
3066 . $Term::ReadLine::TermCap::rl_term_set[1]
3074 return if defined $ENV{LESS} && $ENV{LESS} =~ /r/;
3075 my $is_less = $pager =~ /\bless\b/;
3076 if ($pager =~ /\bmore\b/) {
3077 my @st_more = stat('/usr/bin/more');
3078 my @st_less = stat('/usr/bin/less');
3079 $is_less = @st_more && @st_less
3080 && $st_more[0] == $st_less[0]
3081 && $st_more[1] == $st_less[1];
3083 # changes environment!
3084 $ENV{LESS} .= 'r' if $is_less;
3090 $SIG{'ABRT'} = 'DEFAULT';
3091 kill 'ABRT', $$ if $panic++;
3092 if (defined &Carp::longmess) {
3093 local $SIG{__WARN__} = '';
3094 local $Carp::CarpLevel = 2; # mydie + confess
3095 &warn(Carp::longmess("Signal @_"));
3099 print $DB::OUT "Got signal @_\n";
3107 local $SIG{__WARN__} = '';
3108 local $SIG{__DIE__} = '';
3109 eval { require Carp } if defined $^S; # If error/warning during compilation,
3110 # require may be broken.
3111 CORE::warn(@_, "\nCannot print stack trace, load with -MCarp option to see stack"),
3112 return unless defined &Carp::longmess;
3113 my ($mysingle,$mytrace) = ($single,$trace);
3114 $single = 0; $trace = 0;
3115 my $mess = Carp::longmess(@_);
3116 ($single,$trace) = ($mysingle,$mytrace);
3123 local $SIG{__DIE__} = '';
3124 local $SIG{__WARN__} = '';
3125 my $i = 0; my $ineval = 0; my $sub;
3126 if ($dieLevel > 2) {
3127 local $SIG{__WARN__} = \&dbwarn;
3128 &warn(@_); # Yell no matter what
3131 if ($dieLevel < 2) {
3132 die @_ if $^S; # in eval propagate
3134 # No need to check $^S, eval is much more robust nowadays
3135 eval { require Carp }; #if defined $^S;# If error/warning during compilation,
3136 # require may be broken.
3138 die(@_, "\nCannot print stack trace, load with -MCarp option to see stack")
3139 unless defined &Carp::longmess;
3141 # We do not want to debug this chunk (automatic disabling works
3142 # inside DB::DB, but not in Carp).
3143 my ($mysingle,$mytrace) = ($single,$trace);
3144 $single = 0; $trace = 0;
3147 package Carp; # Do not include us in the list
3149 $mess = Carp::longmess(@_);
3152 ($single,$trace) = ($mysingle,$mytrace);
3158 $prevwarn = $SIG{__WARN__} unless $warnLevel;
3161 $SIG{__WARN__} = \&DB::dbwarn;
3162 } elsif ($prevwarn) {
3163 $SIG{__WARN__} = $prevwarn;
3172 $prevdie = $SIG{__DIE__} unless $dieLevel;
3175 $SIG{__DIE__} = \&DB::dbdie; # if $dieLevel < 2;
3176 #$SIG{__DIE__} = \&DB::diehard if $dieLevel >= 2;
3177 print $OUT "Stack dump during die enabled",
3178 ( $dieLevel == 1 ? " outside of evals" : ""), ".\n"
3180 print $OUT "Dump printed too.\n" if $dieLevel > 2;
3181 } elsif ($prevdie) {
3182 $SIG{__DIE__} = $prevdie;
3183 print $OUT "Default die handler restored.\n";
3191 $prevsegv = $SIG{SEGV} unless $signalLevel;
3192 $prevbus = $SIG{BUS} unless $signalLevel;
3193 $signalLevel = shift;
3195 $SIG{SEGV} = \&DB::diesignal;
3196 $SIG{BUS} = \&DB::diesignal;
3198 $SIG{SEGV} = $prevsegv;
3199 $SIG{BUS} = $prevbus;
3207 my $name = CvGV_name_or_bust($in);
3208 defined $name ? $name : $in;
3211 sub CvGV_name_or_bust {
3213 return if $skipCvGV; # Backdoor to avoid problems if XS broken...
3214 return unless ref $in;
3215 $in = \&$in; # Hard reference...
3216 eval {require Devel::Peek; 1} or return;
3217 my $gv = Devel::Peek::CvGV($in) or return;
3218 *$gv{PACKAGE} . '::' . *$gv{NAME};
3224 return unless defined &$subr;
3225 my $name = CvGV_name_or_bust($subr);
3227 $data = $sub{$name} if defined $name;
3228 return $data if defined $data;
3231 $subr = \&$subr; # Hard reference
3234 $s = $_, last if $subr eq \&$_;
3242 $class = ref $class if ref $class;
3245 methods_via($class, '', 1);
3246 methods_via('UNIVERSAL', 'UNIVERSAL', 0);
3251 return if $packs{$class}++;
3253 my $prepend = $prefix ? "via $prefix: " : '';
3255 for $name (grep {defined &{${"${class}::"}{$_}}}
3256 sort keys %{"${class}::"}) {
3257 next if $seen{ $name }++;
3260 print $DB::OUT "$prepend$name\n";
3262 return unless shift; # Recurse?
3263 for $name (@{"${class}::ISA"}) {
3264 $prepend = $prefix ? $prefix . " -> $name" : $name;
3265 methods_via($name, $prepend, 1);
3270 $doccmd = $^O !~ /^(?:MSWin32|VMS|os2|dos|amigaos|riscos|MacOS|NetWare)\z/s
3271 ? "man" # O Happy Day!
3272 : "perldoc"; # Alas, poor unfortunates
3278 &system("$doccmd $doccmd");
3281 # this way user can override, like with $doccmd="man -Mwhatever"
3282 # or even just "man " to disable the path check.
3283 unless ($doccmd eq 'man') {
3284 &system("$doccmd $page");
3288 $page = 'perl' if lc($page) eq 'help';
3291 my $man1dir = $Config::Config{'man1dir'};
3292 my $man3dir = $Config::Config{'man3dir'};
3293 for ($man1dir, $man3dir) { s#/[^/]*\z## if /\S/ }
3295 $manpath .= "$man1dir:" if $man1dir =~ /\S/;
3296 $manpath .= "$man3dir:" if $man3dir =~ /\S/ && $man1dir ne $man3dir;
3297 chop $manpath if $manpath;
3298 # harmless if missing, I figure
3299 my $oldpath = $ENV{MANPATH};
3300 $ENV{MANPATH} = $manpath if $manpath;
3301 my $nopathopt = $^O =~ /dunno what goes here/;
3302 if (CORE::system($doccmd,
3303 # I just *know* there are men without -M
3304 (($manpath && !$nopathopt) ? ("-M", $manpath) : ()),
3307 unless ($page =~ /^perl\w/) {
3308 if (grep { $page eq $_ } qw{
3309 5004delta 5005delta amiga api apio book boot bot call compile
3310 cygwin data dbmfilter debug debguts delta diag doc dos dsc embed
3311 faq faq1 faq2 faq3 faq4 faq5 faq6 faq7 faq8 faq9 filter fork
3312 form func guts hack hist hpux intern ipc lexwarn locale lol mod
3313 modinstall modlib number obj op opentut os2 os390 pod port
3314 ref reftut run sec style sub syn thrtut tie toc todo toot tootc
3315 trap unicode var vms win32 xs xstut
3319 CORE::system($doccmd,
3320 (($manpath && !$nopathopt) ? ("-M", $manpath) : ()),
3325 if (defined $oldpath) {
3326 $ENV{MANPATH} = $manpath;
3328 delete $ENV{MANPATH};
3332 # The following BEGIN is very handy if debugger goes havoc, debugging debugger?
3334 BEGIN { # This does not compile, alas.
3335 $IN = \*STDIN; # For bugs before DB::OUT has been opened
3336 $OUT = \*STDERR; # For errors before DB::OUT has been opened
3340 $deep = 100; # warning if stack gets this deep
3344 $SIG{INT} = \&DB::catch;
3345 # This may be enabled to debug debugger:
3346 #$warnLevel = 1 unless defined $warnLevel;
3347 #$dieLevel = 1 unless defined $dieLevel;
3348 #$signalLevel = 1 unless defined $signalLevel;
3350 $db_stop = 0; # Compiler warning
3352 $level = 0; # Level of recursive debugging
3353 # @stack and $doret are needed in sub sub, which is called for DB::postponed.
3354 # Triggers bug (?) in perl is we postpone this until runtime:
3355 @postponed = @stack = (0);
3356 $stack_depth = 0; # Localized $#stack
3361 BEGIN {$^W = $ini_warn;} # Switch warnings back
3363 #use Carp; # This did break, left for debugging
3366 # Specific code for b c l V m f O, &blah, $blah, @blah, %blah
3367 my($text, $line, $start) = @_;
3368 my ($itext, $search, $prefix, $pack) =
3369 ($text, "^\Q${'package'}::\E([^:]+)\$");
3371 return sort grep /^\Q$text/, (keys %sub), qw(postpone load compile), # subroutines
3372 (map { /$search/ ? ($1) : () } keys %sub)
3373 if (substr $line, 0, $start) =~ /^\|*[blc]\s+((postpone|compile)\s+)?$/;
3374 return sort grep /^\Q$text/, values %INC # files
3375 if (substr $line, 0, $start) =~ /^\|*b\s+load\s+$/;
3376 return sort map {($_, db_complete($_ . "::", "V ", 2))}
3377 grep /^\Q$text/, map { /^(.*)::$/ ? ($1) : ()} keys %:: # top-packages
3378 if (substr $line, 0, $start) =~ /^\|*[Vm]\s+$/ and $text =~ /^\w*$/;
3379 return sort map {($_, db_complete($_ . "::", "V ", 2))}
3381 grep /^\Q$text/, map { /^(.*)::$/ ? ($prefix . "::$1") : ()} keys %{$prefix . '::'}
3383 if (substr $line, 0, $start) =~ /^\|*[Vm]\s+$/
3384 and $text =~ /^(.*[^:])::?(\w*)$/ and $prefix = $1;
3385 if ( $line =~ /^\|*f\s+(.*)/ ) { # Loaded files
3386 # We may want to complete to (eval 9), so $text may be wrong
3387 $prefix = length($1) - length($text);
3390 map {substr $_, 2 + $prefix} grep /^_<\Q$text/, (keys %main::), $0
3392 if ((substr $text, 0, 1) eq '&') { # subroutines
3393 $text = substr $text, 1;
3395 return sort map "$prefix$_",
3398 (map { /$search/ ? ($1) : () }
3401 if ($text =~ /^[\$@%](.*)::(.*)/) { # symbols in a package
3402 $pack = ($1 eq 'main' ? '' : $1) . '::';
3403 $prefix = (substr $text, 0, 1) . $1 . '::';
3406 = map "$prefix$_", grep /^\Q$text/, grep /^_?[a-zA-Z]/, keys %$pack ;
3407 if (@out == 1 and $out[0] =~ /::$/ and $out[0] ne $itext) {
3408 return db_complete($out[0], $line, $start);
3412 if ($text =~ /^[\$@%]/) { # symbols (in $package + packages in main)
3413 $pack = ($package eq 'main' ? '' : $package) . '::';
3414 $prefix = substr $text, 0, 1;
3415 $text = substr $text, 1;
3416 my @out = map "$prefix$_", grep /^\Q$text/,
3417 (grep /^_?[a-zA-Z]/, keys %$pack),
3418 ( $pack eq '::' ? () : (grep /::$/, keys %::) ) ;
3419 if (@out == 1 and $out[0] =~ /::$/ and $out[0] ne $itext) {
3420 return db_complete($out[0], $line, $start);
3424 if ((substr $line, 0, $start) =~ /^\|*O\b.*\s$/) { # Options after a space
3425 my @out = grep /^\Q$text/, @options;
3426 my $val = option_val($out[0], undef);
3428 if (not defined $val or $val =~ /[\n\r]/) {
3429 # Can do nothing better
3430 } elsif ($val =~ /\s/) {
3432 foreach $l (split //, qq/\"\'\#\|/) {
3433 $out = "$l$val$l ", last if (index $val, $l) == -1;
3438 # Default to value if one completion, to question if many
3439 $rl_attribs->{completer_terminator_character} = (@out == 1 ? $out : '? ');
3442 return $term->filename_list($text); # filenames
3447 print $OUT "Use `q' to quit or `R' to restart. `h q' for details.\n"
3451 if (defined($ini_pids)) {
3452 $ENV{PERLDB_PIDS} = $ini_pids;
3454 delete($ENV{PERLDB_PIDS});
3459 $finished = 1 if $inhibit_exit; # So that some keys may be disabled.
3460 $fall_off_end = 1 unless $inhibit_exit;
3461 # Do not stop in at_exit() and destructors on exit:
3462 $DB::single = !$fall_off_end && !$runnonstop;
3463 DB::fake::at_exit() unless $fall_off_end or $runnonstop;
3467 # ===================================== pre580 ================================
3468 # this is very sad below here...
3471 sub cmd_pre580_null {
3477 if ($cmd =~ /^(\d*)\s*(.*)/) {
3478 $i = $1 || $line; $j = $2;
3480 if ($dbline[$i] == 0) {
3481 print $OUT "Line $i may not have an action.\n";
3483 $had_breakpoints{$filename} |= 2;
3484 $dbline{$i} =~ s/\0[^\0]*//;
3485 $dbline{$i} .= "\0" . action($j);
3488 $dbline{$i} =~ s/\0[^\0]*//;
3489 delete $dbline{$i} if $dbline{$i} eq '';
3497 if ($cmd =~ /^load\b\s*(.*)/) {
3498 my $file = $1; $file =~ s/\s+$//;
3500 } elsif ($cmd =~ /^(postpone|compile)\b\s*([':A-Za-z_][':\w]*)\s*(.*)/) {
3501 my $cond = length $3 ? $3 : '1';
3502 my ($subname, $break) = ($2, $1 eq 'postpone');
3503 $subname =~ s/\'/::/g;
3504 $subname = "${'package'}::" . $subname
3505 unless $subname =~ /::/;
3506 $subname = "main".$subname if substr($subname,0,2) eq "::";
3507 $postponed{$subname} = $break ? "break +0 if $cond" : "compile";
3508 } elsif ($cmd =~ /^([':A-Za-z_][':\w]*(?:\[.*\])?)\s*(.*)/) {
3510 my $cond = length $2 ? $2 : '1';
3511 &cmd_b_sub($subname, $cond);
3512 } elsif ($cmd =~ /^(\d*)\s*(.*)/) {
3513 my $i = $1 || $dbline;
3514 my $cond = length $2 ? $2 : '1';
3515 &cmd_b_line($i, $cond);
3521 if ($cmd =~ /^\s*$/) {
3522 print $OUT "Deleting all breakpoints...\n";
3524 for $file (keys %had_breakpoints) {
3525 local *dbline = $main::{'_<' . $file};
3529 for ($i = 1; $i <= $max ; $i++) {
3530 if (defined $dbline{$i}) {
3531 $dbline{$i} =~ s/^[^\0]+//;
3532 if ($dbline{$i} =~ s/^\0?$//) {
3538 if (not $had_breakpoints{$file} &= ~1) {
3539 delete $had_breakpoints{$file};
3543 undef %postponed_file;
3544 undef %break_on_load;
3550 if ($cmd =~ /^\s*$/) {
3551 print_help($pre580_help);
3552 } elsif ($cmd =~ /^h\s*/) {
3553 print_help($pre580_summary);
3554 } elsif ($cmd =~ /^h\s+(\S.*)$/) {
3555 my $asked = $1; # for proper errmsg
3556 my $qasked = quotemeta($asked); # for searching
3557 # XXX: finds CR but not <CR>
3558 if ($pre580_help =~ /^<?(?:[IB]<)$qasked/m) {
3559 while ($pre580_help =~ /^(<?(?:[IB]<)$qasked([\s\S]*?)\n)(?!\s)/mg) {
3563 print_help("B<$asked> is not a debugger command.\n");
3572 @to_watch = @old_watch = ();
3573 } elsif ($cmd =~ /^(.*)/s) {
3577 $val = (defined $val) ? "'$val'" : 'undef' ;
3578 push @old_watch, $val;
3586 "Debugged program terminated. Use `q' to quit or `R' to restart.";
3589 package DB; # Do not trace this 1; below!