3 # Debugger for Perl 5.00x; perl5db.pl patch level:
6 $header = "perl5db.pl version $VERSION";
8 # Enhanced by ilya@math.ohio-state.edu (Ilya Zakharevich)
9 # Latest version available: ftp://ftp.math.ohio-state.edu/pub/users/ilya/perl
11 # modified Perl debugger, to be run from Emacs in perldb-mode
12 # Ray Lischner (uunet!mntgfx!lisch) as of 5 Nov 1990
13 # Johan Vromans -- upgrade to 4.0 pl 10
14 # Ilya Zakharevich -- patches after 5.001 (and some before ;-)
17 # This file is automatically included if you do perl -d.
18 # It's probably not useful to include this yourself.
20 # Perl supplies the values for %sub. It effectively inserts
21 # a &DB'DB(); in front of every place that can have a
22 # breakpoint. Instead of a subroutine call it calls &DB::sub with
23 # $DB::sub being the called subroutine. It also inserts a BEGIN
24 # {require 'perl5db.pl'} before the first line.
26 # After each `require'd file is compiled, but before it is executed, a
27 # call to DB::postponed($main::{'_<'.$filename}) is emulated. Here the
28 # $filename is the expanded name of the `require'd file (as found as
31 # Additional services from Perl interpreter:
33 # if caller() is called from the package DB, it provides some
36 # The array @{$main::{'_<'.$filename} is the line-by-line contents of
39 # The hash %{'_<'.$filename} contains breakpoints and action (it is
40 # keyed by line number), and individual entries are settable (as
41 # opposed to the whole hash). Only true/false is important to the
42 # interpreter, though the values used by perl5db.pl have the form
43 # "$break_condition\0$action". Values are magical in numeric context.
45 # The scalar ${'_<'.$filename} contains "_<$filename".
47 # Note that no subroutine call is possible until &DB::sub is defined
48 # (for subroutines defined outside of the package DB). In fact the same is
49 # true if $deep is not defined.
54 # At start reads $rcfile that may set important options. This file
55 # may define a subroutine &afterinit that will be executed after the
56 # debugger is initialized.
58 # After $rcfile is read reads environment variable PERLDB_OPTS and parses
59 # it as a rest of `O ...' line in debugger prompt.
61 # The options that can be specified only at startup:
62 # [To set in $rcfile, call &parse_options("optionName=new_value").]
64 # TTY - the TTY to use for debugging i/o.
66 # noTTY - if set, goes in NonStop mode. On interrupt if TTY is not set
67 # uses the value of noTTY or "/tmp/perldbtty$$" to find TTY using
68 # Term::Rendezvous. Current variant is to have the name of TTY in this
71 # ReadLine - If false, dummy ReadLine is used, so you can debug
72 # ReadLine applications.
74 # NonStop - if true, no i/o is performed until interrupt.
76 # LineInfo - file or pipe to print line number info to. If it is a
77 # pipe, a short "emacs like" message is used.
79 # Example $rcfile: (delete leading hashes!)
81 # &parse_options("NonStop=1 LineInfo=db.out");
82 # sub afterinit { $trace = 1; }
84 # The script will run without human intervention, putting trace
85 # information into db.out. (If you interrupt it, you would better
86 # reset LineInfo to something "interactive"!)
88 ##################################################################
91 # A lot of things changed after 0.94. First of all, core now informs
92 # debugger about entry into XSUBs, overloaded operators, tied operations,
93 # BEGIN and END. Handy with `O f=2'.
95 # This can make debugger a little bit too verbose, please be patient
96 # and report your problems promptly.
98 # Now the option frame has 3 values: 0,1,2.
100 # Note that if DESTROY returns a reference to the object (or object),
101 # the deletion of data may be postponed until the next function call,
102 # due to the need to examine the return value.
104 # Changes: 0.95: `v' command shows versions.
105 # Changes: 0.96: `v' command shows version of readline.
106 # primitive completion works (dynamic variables, subs for `b' and `l',
107 # options). Can `p %var'
108 # Better help (`h <' now works). New commands <<, >>, {, {{.
109 # {dump|print}_trace() coded (to be able to do it from <<cmd).
110 # `c sub' documented.
111 # At last enough magic combined to stop after the end of debuggee.
112 # !! should work now (thanks to Emacs bracket matching an extra
113 # `]' in a regexp is caught).
114 # `L', `D' and `A' span files now (as documented).
115 # Breakpoints in `require'd code are possible (used in `R').
116 # Some additional words on internal work of debugger.
117 # `b load filename' implemented.
118 # `b postpone subr' implemented.
119 # now only `q' exits debugger (overwriteable on $inhibit_exit).
120 # When restarting debugger breakpoints/actions persist.
121 # Buglet: When restarting debugger only one breakpoint/action per
122 # autoloaded function persists.
123 # Changes: 0.97: NonStop will not stop in at_exit().
124 # Option AutoTrace implemented.
125 # Trace printed differently if frames are printed too.
126 # new `inhibitExit' option.
127 # printing of a very long statement interruptible.
128 # Changes: 0.98: New command `m' for printing possible methods
129 # 'l -' is a synonim for `-'.
130 # Cosmetic bugs in printing stack trace.
131 # `frame' & 8 to print "expanded args" in stack trace.
132 # Can list/break in imported subs.
133 # new `maxTraceLen' option.
134 # frame & 4 and frame & 8 granted.
136 # nonstoppable lines do not have `:' near the line number.
137 # `b compile subname' implemented.
138 # Will not use $` any more.
139 # `-' behaves sane now.
140 # Changes: 0.99: Completion for `f', `m'.
141 # `m' will remove duplicate names instead of duplicate functions.
142 # `b load' strips trailing whitespace.
143 # completion ignores leading `|'; takes into account current package
144 # when completing a subroutine name (same for `l').
146 ####################################################################
148 # Needed for the statement after exec():
150 BEGIN { $ini_warn = $^W; $^W = 0 } # Switch compilation warnings off until another BEGIN.
151 local($^W) = 0; # Switch run-time warnings off during init.
154 $dumpvar::arrayDepth,
155 $dumpvar::dumpDBFiles,
156 $dumpvar::dumpPackages,
157 $dumpvar::quoteHighBit,
158 $dumpvar::printUndef,
167 # Command-line + PERLLIB:
170 # $prevwarn = $prevdie = $prevbus = $prevsegv = ''; # Does not help?!
172 $trace = $signal = $single = 0; # Uninitialized warning suppression
173 # (local $^W cannot help - other packages!).
174 $inhibit_exit = $option{PrintRet} = 1;
176 @options = qw(hashDepth arrayDepth DumpDBFiles DumpPackages
177 compactDump veryCompact quote HighBit undefPrint
178 globPrint PrintRet UsageOnly frame AutoTrace
179 TTY noTTY ReadLine NonStop LineInfo maxTraceLen
180 recallCommand ShellBang pager tkRunning ornaments
181 signalLevel warnLevel dieLevel inhibit_exit);
184 hashDepth => \$dumpvar::hashDepth,
185 arrayDepth => \$dumpvar::arrayDepth,
186 DumpDBFiles => \$dumpvar::dumpDBFiles,
187 DumpPackages => \$dumpvar::dumpPackages,
188 HighBit => \$dumpvar::quoteHighBit,
189 undefPrint => \$dumpvar::printUndef,
190 globPrint => \$dumpvar::globPrint,
191 UsageOnly => \$dumpvar::usageOnly,
193 AutoTrace => \$trace,
194 inhibit_exit => \$inhibit_exit,
195 maxTraceLen => \$maxtrace,
199 compactDump => \&dumpvar::compactDump,
200 veryCompact => \&dumpvar::veryCompact,
201 quote => \&dumpvar::quote,
204 ReadLine => \&ReadLine,
205 NonStop => \&NonStop,
206 LineInfo => \&LineInfo,
207 recallCommand => \&recallCommand,
208 ShellBang => \&shellBang,
210 signalLevel => \&signalLevel,
211 warnLevel => \&warnLevel,
212 dieLevel => \&dieLevel,
213 tkRunning => \&tkRunning,
214 ornaments => \&ornaments,
218 compactDump => 'dumpvar.pl',
219 veryCompact => 'dumpvar.pl',
220 quote => 'dumpvar.pl',
223 # These guys may be defined in $ENV{PERL5DB} :
224 $rl = 1 unless defined $rl;
225 $warnLevel = 1 unless defined $warnLevel;
226 $dieLevel = 1 unless defined $dieLevel;
227 $signalLevel = 1 unless defined $signalLevel;
228 $pre = [] unless defined $pre;
229 $post = [] unless defined $post;
230 $pretype = [] unless defined $pretype;
231 warnLevel($warnLevel);
233 signalLevel($signalLevel);
234 &pager(defined($ENV{PAGER}) ? $ENV{PAGER} : "|more") unless defined $pager;
235 &recallCommand("!") unless defined $prc;
236 &shellBang("!") unless defined $psh;
237 $maxtrace = 400 unless defined $maxtrace;
242 $rcfile="perldb.ini";
247 } elsif (defined $ENV{LOGDIR} and -f "$ENV{LOGDIR}/$rcfile") {
248 do "$ENV{LOGDIR}/$rcfile";
249 } elsif (defined $ENV{HOME} and -f "$ENV{HOME}/$rcfile") {
250 do "$ENV{HOME}/$rcfile";
253 if (defined $ENV{PERLDB_OPTS}) {
254 parse_options($ENV{PERLDB_OPTS});
257 if (exists $ENV{PERLDB_RESTART}) {
258 delete $ENV{PERLDB_RESTART};
260 @hist = get_list('PERLDB_HIST');
261 %break_on_load = get_list("PERLDB_ON_LOAD");
262 %postponed = get_list("PERLDB_POSTPONE");
263 my @had_breakpoints= get_list("PERLDB_VISITED");
264 for (0 .. $#had_breakpoints) {
265 my %pf = get_list("PERLDB_FILE_$_");
266 $postponed_file{$had_breakpoints[$_]} = \%pf if %pf;
268 my %opt = get_list("PERLDB_OPT");
270 while (($opt,$val) = each %opt) {
271 $val =~ s/[\\\']/\\$1/g;
272 parse_options("$opt'$val'");
274 @INC = get_list("PERLDB_INC");
276 $pretype = [get_list("PERLDB_PRETYPE")];
277 $pre = [get_list("PERLDB_PRE")];
278 $post = [get_list("PERLDB_POST")];
279 @typeahead = get_list("PERLDB_TYPEAHEAD", @typeahead);
285 # Is Perl being run from Emacs?
286 $emacs = ((defined $main::ARGV[0]) and ($main::ARGV[0] eq '-emacs'));
287 $rl = 0, shift(@main::ARGV) if $emacs;
289 #require Term::ReadLine;
292 $console = "/dev/tty";
293 } elsif (-e "con" or $^O eq 'MSWin32') {
296 $console = "sys\$command";
299 if (($^O eq 'MSWin32') and ($emacs or defined $ENV{EMACS})) {
304 if (defined $ENV{OS2_SHELL} and ($emacs or $ENV{WINDOWID})) { # In OS/2
308 $console = $tty if defined $tty;
310 if (defined $console) {
311 open(IN,"+<$console") || open(IN,"<$console") || open(IN,"<&STDIN");
312 open(OUT,"+>$console") || open(OUT,">$console") || open(OUT,">&STDERR")
313 || open(OUT,">&STDOUT"); # so we don't dongle stdout
316 open(OUT,">&STDERR") || open(OUT,">&STDOUT"); # so we don't dongle stdout
317 $console = 'STDIN/OUT';
319 # so open("|more") can read from STDOUT and so we don't dingle stdin
324 $| = 1; # for DB::OUT
327 $LINEINFO = $OUT unless defined $LINEINFO;
328 $lineinfo = $console unless defined $lineinfo;
330 $| = 1; # for real STDOUT
332 $header =~ s/.Header: ([^,]+),v(\s+\S+\s+\S+).*$/$1$2/;
333 unless ($runnonstop) {
334 print $OUT "\nLoading DB routines from $header\n";
335 print $OUT ("Emacs support ",
336 $emacs ? "enabled" : "available",
338 print $OUT "\nEnter h or `h h' for help.\n\n";
345 s/(.*)/'$1'/ unless /^-?[\d.]+$/;
348 if (defined &afterinit) { # May be defined in $rcfile
354 ############################################################ Subroutines
357 # _After_ the perl program is compiled, $single is set to 1:
358 if ($single and not $second_time++) {
359 if ($runnonstop) { # Disable until signal
360 for ($i=0; $i <= $#stack; ) {
364 # return; # Would not print trace!
367 $runnonstop = 0 if $single or $signal; # Disable it if interactive.
369 ($package, $filename, $line) = caller;
370 $filename_ini = $filename;
371 $usercontext = '($@, $!, $,, $/, $\, $^W) = @saved;' .
372 "package $package;"; # this won't let them modify, alas
373 local(*dbline) = $main::{'_<' . $filename};
375 if (($stop,$action) = split(/\0/,$dbline{$line})) {
379 $evalarg = "\$DB::signal |= do {$stop;}"; &eval;
380 $dbline{$line} =~ s/;9($|\0)/$1/;
383 my $was_signal = $signal;
385 if ($single || $trace || $was_signal) {
388 $position = "\032\032$filename:$line:0\n";
389 print $LINEINFO $position;
392 $prefix = $sub =~ /::/ ? "" : "${'package'}::";
393 $prefix .= "$sub($filename:";
394 $after = ($dbline[$line] =~ /\n$/ ? '' : "\n");
395 if (length($prefix) > 30) {
396 $position = "$prefix$line):\n$line:\t$dbline[$line]$after";
401 $position = "$prefix$line$infix$dbline[$line]$after";
404 print $LINEINFO ' ' x $#stack, "$line:\t$dbline[$line]$after";
406 print $LINEINFO $position;
408 for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { #{ vi
409 last if $dbline[$i] =~ /^\s*[\;\}\#\n]/;
411 $after = ($dbline[$i] =~ /\n$/ ? '' : "\n");
412 $incr_pos = "$prefix$i$infix$dbline[$i]$after";
413 $position .= $incr_pos;
415 print $LINEINFO ' ' x $#stack, "$i:\t$dbline[$i]$after";
417 print $LINEINFO $incr_pos;
422 $evalarg = $action, &eval if $action;
423 if ($single || $was_signal) {
424 local $level = $level + 1;
425 foreach $evalarg (@$pre) {
428 print $OUT $#stack . " levels deep in subroutine calls!\n"
431 $incr = -1; # for backward motion.
432 @typeahead = @$pretype, @typeahead;
434 while (($term || &setterm),
435 ($term_pid == $$ or &resetterm),
436 defined ($cmd=&readline(" DB" . ('<' x $level) .
437 ($#hist+1) . ('>' x $level) .
441 $cmd =~ s/\\$/\n/ && do {
442 $cmd .= &readline(" cont: ");
445 $cmd =~ /^$/ && ($cmd = $laststep);
446 push(@hist,$cmd) if length($cmd) > 1;
448 ($i) = split(/\s+/,$cmd);
449 eval "\$cmd =~ $alias{$i}", print $OUT $@ if $alias{$i};
450 $cmd =~ /^q$/ && ($exiting = 1) && exit 0;
451 $cmd =~ /^h$/ && do {
454 $cmd =~ /^h\s+h$/ && do {
457 $cmd =~ /^h\s+(\S)$/ && do {
459 if ($help =~ /^$asked/m) {
460 while ($help =~ /^($asked([\s\S]*?)\n)(\Z|[^\s$asked])/mg) {
464 print $OUT "`$asked' is not a debugger command.\n";
467 $cmd =~ /^t$/ && do {
469 print $OUT "Trace = ".($trace?"on":"off")."\n";
471 $cmd =~ /^S(\s+(!)?(.+))?$/ && do {
472 $Srev = defined $2; $Spatt = $3; $Snocheck = ! defined $1;
473 foreach $subname (sort(keys %sub)) {
474 if ($Snocheck or $Srev^($subname =~ /$Spatt/)) {
475 print $OUT $subname,"\n";
479 $cmd =~ /^v$/ && do {
480 list_versions(); next CMD};
481 $cmd =~ s/^X\b/V $package/;
482 $cmd =~ /^V$/ && do {
483 $cmd = "V $package"; };
484 $cmd =~ /^V\b\s*(\S+)\s*(.*)/ && do {
485 local ($savout) = select($OUT);
487 @vars = split(' ',$2);
488 do 'dumpvar.pl' unless defined &main::dumpvar;
489 if (defined &main::dumpvar) {
492 &main::dumpvar($packname,@vars);
494 print $OUT "dumpvar.pl not available.\n";
498 $cmd =~ s/^x\b/ / && do { # So that will be evaled
499 $onetimeDump = 'dump'; };
500 $cmd =~ s/^m\s+([\w:]+)\s*$/ / && do {
501 methods($1); next CMD};
502 $cmd =~ s/^m\b/ / && do { # So this will be evaled
503 $onetimeDump = 'methods'; };
504 $cmd =~ /^f\b\s*(.*)/ && do {
508 print $OUT "The old f command is now the r command.\n";
509 print $OUT "The new f command switches filenames.\n";
512 if (!defined $main::{'_<' . $file}) {
513 if (($try) = grep(m#^_<.*$file#, keys %main::)) {{
514 $try = substr($try,2);
515 print $OUT "Choosing $try matching `$file':\n";
519 if (!defined $main::{'_<' . $file}) {
520 print $OUT "No file matching `$file' is loaded.\n";
522 } elsif ($file ne $filename) {
523 *dbline = $main::{'_<' . $file};
529 print $OUT "Already in $file.\n";
533 $cmd =~ s/^l\s+-\s*$/-/;
534 $cmd =~ /^l\b\s*([\':A-Za-z_][\':\w]*)/ && do {
536 $subname =~ s/\'/::/;
537 $subname = $package."::".$subname
538 unless $subname =~ /::/;
539 $subname = "main".$subname if substr($subname,0,2) eq "::";
540 @pieces = split(/:/,find_sub($subname));
541 $subrange = pop @pieces;
542 $file = join(':', @pieces);
543 if ($file ne $filename) {
544 *dbline = $main::{'_<' . $file};
549 if (eval($subrange) < -$window) {
550 $subrange =~ s/-.*/+/;
552 $cmd = "l $subrange";
554 print $OUT "Subroutine $subname not found.\n";
557 $cmd =~ /^\.$/ && do {
558 $incr = -1; # for backward motion.
560 $filename = $filename_ini;
561 *dbline = $main::{'_<' . $filename};
563 print $LINEINFO $position;
565 $cmd =~ /^w\b\s*(\d*)$/ && do {
569 #print $OUT 'l ' . $start . '-' . ($start + $incr);
570 $cmd = 'l ' . $start . '-' . ($start + $incr); };
571 $cmd =~ /^-$/ && do {
572 $start -= $incr + $window + 1;
573 $start = 1 if $start <= 0;
575 $cmd = 'l ' . ($start) . '+'; };
576 $cmd =~ /^l$/ && do {
578 $cmd = 'l ' . $start . '-' . ($start + $incr); };
579 $cmd =~ /^l\b\s*(\d*)\+(\d*)$/ && do {
582 $incr = $window - 1 unless $incr;
583 $cmd = 'l ' . $start . '-' . ($start + $incr); };
584 $cmd =~ /^l\b\s*((-?[\d\$\.]+)([-,]([\d\$\.]+))?)?/ && do {
585 $end = (!defined $2) ? $max : ($4 ? $4 : $2);
586 $end = $max if $end > $max;
588 $i = $line if $i eq '.';
592 print $OUT "\032\032$filename:$i:0\n";
595 for (; $i <= $end; $i++) {
596 ($stop,$action) = split(/\0/, $dbline{$i});
598 and $filename eq $filename_ini)
600 : ($dbline[$i]+0 ? ':' : ' ') ;
601 $arrow .= 'b' if $stop;
602 $arrow .= 'a' if $action;
603 print $OUT "$i$arrow\t", $dbline[$i];
607 $start = $i; # remember in case they want more
608 $start = $max if $start > $max;
610 $cmd =~ /^D$/ && do {
611 print $OUT "Deleting all breakpoints...\n";
613 for $file (keys %had_breakpoints) {
614 local *dbline = $main::{'_<' . $file};
618 for ($i = 1; $i <= $max ; $i++) {
619 if (defined $dbline{$i}) {
620 $dbline{$i} =~ s/^[^\0]+//;
621 if ($dbline{$i} =~ s/^\0?$//) {
628 undef %postponed_file;
629 undef %break_on_load;
630 undef %had_breakpoints;
632 $cmd =~ /^L$/ && do {
634 for $file (keys %had_breakpoints) {
635 local *dbline = $main::{'_<' . $file};
639 for ($i = 1; $i <= $max; $i++) {
640 if (defined $dbline{$i}) {
641 print "$file:\n" unless $was++;
642 print $OUT " $i:\t", $dbline[$i];
643 ($stop,$action) = split(/\0/, $dbline{$i});
644 print $OUT " break if (", $stop, ")\n"
646 print $OUT " action: ", $action, "\n"
653 print $OUT "Postponed breakpoints in subroutines:\n";
655 for $subname (keys %postponed) {
656 print $OUT " $subname\t$postponed{$subname}\n";
660 my @have = map { # Combined keys
661 keys %{$postponed_file{$_}}
662 } keys %postponed_file;
664 print $OUT "Postponed breakpoints in files:\n";
666 for $file (keys %postponed_file) {
667 my $db = $postponed_file{$file};
668 print $OUT " $file:\n";
669 for $line (sort {$a <=> $b} keys %$db) {
670 print $OUT " $line:\n";
671 my ($stop,$action) = split(/\0/, $$db{$line});
672 print $OUT " break if (", $stop, ")\n"
674 print $OUT " action: ", $action, "\n"
681 if (%break_on_load) {
682 print $OUT "Breakpoints on load:\n";
684 for $file (keys %break_on_load) {
685 print $OUT " $file\n";
690 $cmd =~ /^b\b\s*load\b\s*(.*)/ && do {
691 my $file = $1; $file =~ s/\s+$//;
693 $break_on_load{$file} = 1;
694 $break_on_load{$::INC{$file}} = 1 if $::INC{$file};
695 $file .= '.pm', redo unless $file =~ /\./;
697 $had_breakpoints{$file} = 1;
698 print $OUT "Will stop on load of `@{[join '\', `', sort keys %break_on_load]}'.\n";
700 $cmd =~ /^b\b\s*(postpone|compile)\b\s*([':A-Za-z_][':\w]*)\s*(.*)/ && do {
701 my $cond = $3 || '1';
702 my ($subname, $break) = ($2, $1 eq 'postpone');
703 $subname =~ s/\'/::/;
704 $subname = "${'package'}::" . $subname
705 unless $subname =~ /::/;
706 $subname = "main".$subname if substr($subname,0,2) eq "::";
707 $postponed{$subname} = $break
708 ? "break +0 if $cond" : "compile";
710 $cmd =~ /^b\b\s*([':A-Za-z_][':\w]*)\s*(.*)/ && do {
713 $subname =~ s/\'/::/;
714 $subname = "${'package'}::" . $subname
715 unless $subname =~ /::/;
716 $subname = "main".$subname if substr($subname,0,2) eq "::";
717 # Filename below can contain ':'
718 ($file,$i) = (find_sub($subname) =~ /^(.*):(.*)$/);
722 *dbline = $main::{'_<' . $filename};
723 $had_breakpoints{$filename} = 1;
725 ++$i while $dbline[$i] == 0 && $i < $max;
726 $dbline{$i} =~ s/^[^\0]*/$cond/;
728 print $OUT "Subroutine $subname not found.\n";
731 $cmd =~ /^b\b\s*(\d*)\s*(.*)/ && do {
734 if ($dbline[$i] == 0) {
735 print $OUT "Line $i not breakable.\n";
737 $had_breakpoints{$filename} = 1;
738 $dbline{$i} =~ s/^[^\0]*/$cond/;
741 $cmd =~ /^d\b\s*(\d+)?/ && do {
743 $dbline{$i} =~ s/^[^\0]*//;
744 delete $dbline{$i} if $dbline{$i} eq '';
746 $cmd =~ /^A$/ && do {
748 for $file (keys %had_breakpoints) {
749 local *dbline = $main::{'_<' . $file};
753 for ($i = 1; $i <= $max ; $i++) {
754 if (defined $dbline{$i}) {
755 $dbline{$i} =~ s/\0[^\0]*//;
756 delete $dbline{$i} if $dbline{$i} eq '';
761 $cmd =~ /^O\s*$/ && do {
766 $cmd =~ /^O\s*(\S.*)/ && do {
769 $cmd =~ /^\<\<\s*(.*)/ && do { # \<\< for CPerl sake: not HERE
770 push @$pre, action($1);
772 $cmd =~ /^>>\s*(.*)/ && do {
773 push @$post, action($1);
775 $cmd =~ /^<\s*(.*)/ && do {
776 $pre = [], next CMD unless $1;
779 $cmd =~ /^>\s*(.*)/ && do {
780 $post = [], next CMD unless $1;
781 $post = [action($1)];
783 $cmd =~ /^\{\{\s*(.*)/ && do {
786 $cmd =~ /^\{\s*(.*)/ && do {
787 $pretype = [], next CMD unless $1;
790 $cmd =~ /^a\b\s*(\d+)(\s+(.*))?/ && do {
792 if ($dbline[$i] == 0) {
793 print $OUT "Line $i may not have an action.\n";
795 $dbline{$i} =~ s/\0[^\0]*//;
796 $dbline{$i} .= "\0" . action($j);
799 $cmd =~ /^n$/ && do {
800 end_report(), next CMD if $finished and $level <= 1;
804 $cmd =~ /^s$/ && do {
805 end_report(), next CMD if $finished and $level <= 1;
809 $cmd =~ /^c\b\s*([\w:]*)\s*$/ && do {
810 end_report(), next CMD if $finished and $level <= 1;
812 if ($i =~ /\D/) { # subroutine name
813 $subname = $package."::".$subname
814 unless $subname =~ /::/;
815 ($file,$i) = (find_sub($subname) =~ /^(.*):(.*)$/);
819 *dbline = $main::{'_<' . $filename};
820 $had_breakpoints{$filename}++;
822 ++$i while $dbline[$i] == 0 && $i < $max;
824 print $OUT "Subroutine $subname not found.\n";
829 if ($dbline[$i] == 0) {
830 print $OUT "Line $i not breakable.\n";
833 $dbline{$i} =~ s/($|\0)/;9$1/; # add one-time-only b.p.
835 for ($i=0; $i <= $#stack; ) {
839 $cmd =~ /^r$/ && do {
840 end_report(), next CMD if $finished and $level <= 1;
841 $stack[$#stack] |= 1;
842 $doret = $option{PrintRet} ? $#stack - 1 : -2;
844 $cmd =~ /^R$/ && do {
845 print $OUT "Warning: some settings and command-line options may be lost!\n";
846 my (@script, @flags, $cl);
847 push @flags, '-w' if $ini_warn;
848 # Put all the old includes at the start to get
851 push @flags, '-I', $_;
853 # Arrange for setting the old INC:
854 set_list("PERLDB_INC", @ini_INC);
856 for (1..$#{'::_<-e'}) { # The first line is PERL5DB
857 chomp ($cl = $ {'::_<-e'}[$_]);
858 push @script, '-e', $cl;
863 set_list("PERLDB_HIST",
864 $term->Features->{getHistory}
865 ? $term->GetHistory : @hist);
866 my @had_breakpoints = keys %had_breakpoints;
867 set_list("PERLDB_VISITED", @had_breakpoints);
868 set_list("PERLDB_OPT", %option);
869 set_list("PERLDB_ON_LOAD", %break_on_load);
871 for (0 .. $#had_breakpoints) {
872 my $file = $had_breakpoints[$_];
873 *dbline = $main::{'_<' . $file};
874 next unless %dbline or $postponed_file{$file};
875 (push @hard, $file), next
876 if $file =~ /^\(eval \d+\)$/;
878 @add = %{$postponed_file{$file}}
879 if $postponed_file{$file};
880 set_list("PERLDB_FILE_$_", %dbline, @add);
882 for (@hard) { # Yes, really-really...
883 # Find the subroutines in this eval
884 *dbline = $main::{'_<' . $_};
885 my ($quoted, $sub, %subs, $line) = quotemeta $_;
886 for $sub (keys %sub) {
887 next unless $sub{$sub} =~ /^$quoted:(\d+)-(\d+)$/;
888 $subs{$sub} = [$1, $2];
892 "No subroutines in $_, ignoring breakpoints.\n";
895 LINES: for $line (keys %dbline) {
896 # One breakpoint per sub only:
897 my ($offset, $sub, $found);
898 SUBS: for $sub (keys %subs) {
899 if ($subs{$sub}->[1] >= $line # Not after the subroutine
900 and (not defined $offset # Not caught
901 or $offset < 0 )) { # or badly caught
903 $offset = $line - $subs{$sub}->[0];
904 $offset = "+$offset", last SUBS if $offset >= 0;
907 if (defined $offset) {
909 "break $offset if $dbline{$line}";
911 print $OUT "Breakpoint in $_:$line ignored: after all the subroutines.\n";
915 set_list("PERLDB_POSTPONE", %postponed);
916 set_list("PERLDB_PRETYPE", @$pretype);
917 set_list("PERLDB_PRE", @$pre);
918 set_list("PERLDB_POST", @$post);
919 set_list("PERLDB_TYPEAHEAD", @typeahead);
920 $ENV{PERLDB_RESTART} = 1;
921 #print "$^X, '-d', @flags, @script, ($emacs ? '-emacs' : ()), @ARGS";
922 exec $^X, '-d', @flags, @script, ($emacs ? '-emacs' : ()), @ARGS;
923 print $OUT "exec failed: $!\n";
925 $cmd =~ /^T$/ && do {
926 print_trace($OUT, 1); # skip DB
928 $cmd =~ /^\/(.*)$/ && do {
930 $inpat =~ s:([^\\])/$:$1:;
932 eval '$inpat =~ m'."\a$inpat\a";
944 $start = 1 if ($start > $max);
945 last if ($start == $end);
946 if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) {
948 print $OUT "\032\032$filename:$start:0\n";
950 print $OUT "$start:\t", $dbline[$start], "\n";
955 print $OUT "/$pat/: not found\n" if ($start == $end);
957 $cmd =~ /^\?(.*)$/ && do {
959 $inpat =~ s:([^\\])\?$:$1:;
961 eval '$inpat =~ m'."\a$inpat\a";
973 $start = $max if ($start <= 0);
974 last if ($start == $end);
975 if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) {
977 print $OUT "\032\032$filename:$start:0\n";
979 print $OUT "$start:\t", $dbline[$start], "\n";
984 print $OUT "?$pat?: not found\n" if ($start == $end);
986 $cmd =~ /^$rc+\s*(-)?(\d+)?$/ && do {
987 pop(@hist) if length($cmd) > 1;
988 $i = $1 ? ($#hist-($2?$2:1)) : ($2?$2:$#hist);
989 $cmd = $hist[$i] . "\n";
992 $cmd =~ /^$sh$sh\s*([\x00-\xff]*)/ && do {
995 $cmd =~ /^$rc([^$rc].*)$/ && do {
997 pop(@hist) if length($cmd) > 1;
998 for ($i = $#hist; $i; --$i) {
999 last if $hist[$i] =~ /$pat/;
1002 print $OUT "No such command!\n\n";
1005 $cmd = $hist[$i] . "\n";
1008 $cmd =~ /^$sh$/ && do {
1009 &system($ENV{SHELL}||"/bin/sh");
1011 $cmd =~ /^$sh\s*([\x00-\xff]*)/ && do {
1012 &system($ENV{SHELL}||"/bin/sh","-c",$1);
1014 $cmd =~ /^H\b\s*(-(\d+))?/ && do {
1015 $end = $2?($#hist-$2):0;
1016 $hist = 0 if $hist < 0;
1017 for ($i=$#hist; $i>$end; $i--) {
1018 print $OUT "$i: ",$hist[$i],"\n"
1019 unless $hist[$i] =~ /^.?$/;
1022 $cmd =~ s/^p$/print {\$DB::OUT} \$_/;
1023 $cmd =~ s/^p\b/print {\$DB::OUT} /;
1024 $cmd =~ /^=/ && do {
1025 if (local($k,$v) = ($cmd =~ /^=\s*(\S+)\s+(.*)/)) {
1026 $alias{$k}="s~$k~$v~";
1027 print $OUT "$k = $v\n";
1028 } elsif ($cmd =~ /^=\s*$/) {
1029 foreach $k (sort keys(%alias)) {
1030 if (($v = $alias{$k}) =~ s~^s\~$k\~(.*)\~$~$1~) {
1031 print $OUT "$k = $v\n";
1033 print $OUT "$k\t$alias{$k}\n";
1038 $cmd =~ /^\|\|?\s*[^|]/ && do {
1039 if ($pager =~ /^\|/) {
1040 open(SAVEOUT,">&STDOUT") || &warn("Can't save STDOUT");
1041 open(STDOUT,">&OUT") || &warn("Can't redirect STDOUT");
1043 open(SAVEOUT,">&OUT") || &warn("Can't save DB::OUT");
1045 unless ($piped=open(OUT,$pager)) {
1046 &warn("Can't pipe output to `$pager'");
1047 if ($pager =~ /^\|/) {
1048 open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT");
1049 open(STDOUT,">&SAVEOUT")
1050 || &warn("Can't restore STDOUT");
1053 open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT");
1057 $SIG{PIPE}= \&DB::catch if $pager =~ /^\|/
1058 && "" eq $SIG{PIPE} || "DEFAULT" eq $SIG{PIPE};
1059 $selected= select(OUT);
1061 select( $selected ), $selected= "" unless $cmd =~ /^\|\|/;
1062 $cmd =~ s/^\|+\s*//;
1064 # XXX Local variants do not work!
1065 $cmd =~ s/^t\s/\$DB::trace = 1;\n/;
1066 $cmd =~ s/^s\s/\$DB::single = 1;\n/ && do {$laststep = 's'};
1067 $cmd =~ s/^n\s/\$DB::single = 2;\n/ && do {$laststep = 'n'};
1069 $evalarg = "\$^D = \$^D | \$DB::db_stop;\n$cmd"; &eval;
1071 $onetimeDump = undef;
1072 } elsif ($term_pid == $$) {
1077 if ($pager =~ /^\|/) {
1078 $?= 0; close(OUT) || &warn("Can't close DB::OUT");
1079 &warn( "Pager `$pager' failed: ",
1080 ($?>>8) > 128 ? ($?>>8)-256 : ($?>>8),
1081 ( $? & 128 ) ? " (core dumped)" : "",
1082 ( $? & 127 ) ? " (SIG ".($?&127).")" : "", "\n" ) if $?;
1083 open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT");
1084 open(STDOUT,">&SAVEOUT") || &warn("Can't restore STDOUT");
1085 $SIG{PIPE}= "DEFAULT" if $SIG{PIPE} eq \&DB::catch;
1086 # Will stop ignoring SIGPIPE if done like nohup(1)
1087 # does SIGINT but Perl doesn't give us a choice.
1089 open(OUT,">&SAVEOUT") || &warn("Can't restore DB::OUT");
1092 select($selected), $selected= "" unless $selected eq "";
1096 $exiting = 1 unless defined $cmd;
1097 foreach $evalarg (@$post) {
1100 } # if ($single || $signal)
1101 ($@, $!, $,, $/, $\, $^W) = @saved;
1105 # The following code may be executed now:
1109 my ($al, $ret, @ret) = "";
1110 if (length($sub) > 10 && substr($sub, -10, 10) eq '::AUTOLOAD') {
1113 push(@stack, $single);
1115 $single |= 4 if $#stack == $deep;
1117 ? ( (print $LINEINFO ' ' x ($#stack - 1), "in "),
1118 # Why -1? But it works! :-(
1119 print_trace($LINEINFO, -1, 1, 1, "$sub$al") )
1120 : print $LINEINFO ' ' x ($#stack - 1), "entering $sub$al\n") if $frame;
1123 $single |= pop(@stack);
1125 ? ( (print $LINEINFO ' ' x $#stack, "out "),
1126 print_trace($LINEINFO, -1, 1, 1, "$sub$al") )
1127 : print $LINEINFO ' ' x $#stack, "exited $sub$al\n") if $frame & 2;
1128 print ($OUT ($frame & 16 ? ' ' x $#stack : ""),
1129 "list context return from $sub:\n"), dumpit( \@ret ),
1130 $doret = -2 if $doret eq $#stack or $frame & 16;
1133 if (defined wantarray) {
1138 $single |= pop(@stack);
1140 ? ( (print $LINEINFO ' ' x $#stack, "out "),
1141 print_trace($LINEINFO, -1, 1, 1, "$sub$al") )
1142 : print $LINEINFO ' ' x $#stack, "exited $sub$al\n") if $frame & 2;
1143 print ($OUT ($frame & 16 ? ' ' x $#stack : ""),
1144 "scalar context return from $sub: "), dumpit( $ret ),
1145 $doret = -2 if $doret eq $#stack or $frame & 16;
1151 @saved = ($@, $!, $,, $/, $\, $^W);
1152 $, = ""; $/ = "\n"; $\ = ""; $^W = 0;
1155 # The following takes its argument via $evalarg to preserve current @_
1160 local (@stack) = @stack; # guard against recursive debugging
1161 my $otrace = $trace;
1162 my $osingle = $single;
1164 @res = eval "$usercontext $evalarg;\n"; # '\n' for nice recursive debug
1170 local $saved[0]; # Preserve the old value of $@
1174 } elsif ($onetimeDump eq 'dump') {
1176 } elsif ($onetimeDump eq 'methods') {
1182 my $subname = shift;
1183 if ($postponed{$subname} =~ s/^break\s([+-]?\d+)\s+if\s//) {
1184 my $offset = $1 || 0;
1185 # Filename below can contain ':'
1186 my ($file,$i) = (find_sub($subname) =~ /^(.*):(\d+)-.*$/);
1189 local *dbline = $main::{'_<' . $file};
1190 local $^W = 0; # != 0 is magical below
1191 $had_breakpoints{$file}++;
1193 ++$i until $dbline[$i] != 0 or $i >= $max;
1194 $dbline{$i} = delete $postponed{$subname};
1196 print $OUT "Subroutine $subname not found.\n";
1200 elsif ($postponed{$subname} eq 'compile') { $signal = 1 }
1201 #print $OUT "In postponed_sub for `$subname'.\n";
1205 return &postponed_sub
1206 unless ref \$_[0] eq 'GLOB'; # A subroutine is compiled.
1207 # Cannot be done before the file is compiled
1208 local *dbline = shift;
1209 my $filename = $dbline;
1210 $filename =~ s/^_<//;
1211 $signal = 1, print $OUT "'$filename' loaded...\n"
1212 if $break_on_load{$filename};
1213 print $LINEINFO ' ' x $#stack, "Package $filename.\n" if $frame;
1214 return unless $postponed_file{$filename};
1215 $had_breakpoints{$filename}++;
1216 #%dbline = %{$postponed_file{$filename}}; # Cannot be done: unsufficient magic
1218 for $key (keys %{$postponed_file{$filename}}) {
1219 $dbline{$key} = $ {$postponed_file{$filename}}{$key};
1221 delete $postponed_file{$filename};
1225 local ($savout) = select($OUT);
1226 my $osingle = $single;
1227 my $otrace = $trace;
1228 $single = $trace = 0;
1231 unless (defined &main::dumpValue) {
1234 if (defined &main::dumpValue) {
1235 &main::dumpValue(shift);
1237 print $OUT "dumpvar.pl not available.\n";
1244 # Tied method do not create a context, so may get wrong message:
1248 my @sub = dump_trace($_[0] + 1, $_[1]);
1249 my $short = $_[2]; # Print short report, next one for sub name
1251 for ($i=0; $i <= $#sub; $i++) {
1254 my $args = defined $sub[$i]{args}
1255 ? "(@{ $sub[$i]{args} })"
1257 $args = (substr $args, 0, $maxtrace - 3) . '...'
1258 if length $args > $maxtrace;
1259 my $file = $sub[$i]{file};
1260 $file = $file eq '-e' ? $file : "file `$file'" unless $short;
1262 $s = (substr $s, 0, $maxtrace - 3) . '...' if length $s > $maxtrace;
1264 my $sub = @_ >= 4 ? $_[3] : $s;
1265 print $fh "$sub[$i]{context}=$sub$args from $file:$sub[$i]{line}\n";
1267 print $fh "$sub[$i]{context} = $s$args" .
1268 " called from $file" .
1269 " line $sub[$i]{line}\n";
1276 my $count = shift || 1e9;
1279 my ($p,$file,$line,$sub,$h,$args,$e,$r,@a,@sub,$context);
1280 my $nothard = not $frame & 8;
1281 local $frame = 0; # Do not want to trace this.
1282 my $otrace = $trace;
1285 $i < $count and ($p,$file,$line,$sub,$h,$context,$e,$r) = caller($i);
1290 if (not defined $arg) {
1292 } elsif ($nothard and tied $arg) {
1294 } elsif ($nothard and $type = ref $arg) {
1295 push @a, "ref($type)";
1297 local $_ = "$arg"; # Safe to stringify now - should not call f().
1300 unless /^(?: -?[\d.]+ | \*[\w:]* )$/x;
1301 s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg;
1302 s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg;
1306 $context = $context ? '@' : "\$";
1307 $args = $h ? [@a] : undef;
1308 $e =~ s/\n\s*\;\s*\Z// if $e;
1309 $e =~ s/([\\\'])/\\$1/g if $e;
1311 $sub = "require '$e'";
1312 } elsif (defined $r) {
1314 } elsif ($sub eq '(eval)') {
1315 $sub = "eval {...}";
1317 push(@sub, {context => $context, sub => $sub, args => $args,
1318 file => $file, line => $line});
1327 while ($action =~ s/\\$//) {
1338 &readline("cont: ");
1342 # We save, change, then restore STDIN and STDOUT to avoid fork() since
1343 # many non-Unix systems can do system() but have problems with fork().
1344 open(SAVEIN,"<&STDIN") || &warn("Can't save STDIN");
1345 open(SAVEOUT,">&OUT") || &warn("Can't save STDOUT");
1346 open(STDIN,"<&IN") || &warn("Can't redirect STDIN");
1347 open(STDOUT,">&OUT") || &warn("Can't redirect STDOUT");
1349 open(STDIN,"<&SAVEIN") || &warn("Can't restore STDIN");
1350 open(STDOUT,">&SAVEOUT") || &warn("Can't restore STDOUT");
1351 close(SAVEIN); close(SAVEOUT);
1352 &warn( "(Command returned ", ($?>>8) > 128 ? ($?>>8)-256 : ($?>>8), ")",
1353 ( $? & 128 ) ? " (core dumped)" : "",
1354 ( $? & 127 ) ? " (SIG ".($?&127).")" : "", "\n" ) if $?;
1361 local @stack = @stack; # Prevent growth by failing `use'.
1362 eval { require Term::ReadLine } or die $@;
1365 open(IN,"<$tty") or die "Cannot open TTY `$TTY' for read: $!";
1366 open(OUT,">$tty") or die "Cannot open TTY `$TTY' for write: $!";
1369 my $sel = select($OUT);
1373 eval "require Term::Rendezvous;" or die $@;
1374 my $rv = $ENV{PERLDB_NOTTY} || "/tmp/perldbtty$$";
1375 my $term_rv = new Term::Rendezvous $rv;
1377 $OUT = $term_rv->OUT;
1381 $term = new Term::ReadLine::Stub 'perldb', $IN, $OUT;
1383 $term = new Term::ReadLine 'perldb', $IN, $OUT;
1385 $rl_attribs = $term->Attribs;
1386 $rl_attribs->{basic_word_break_characters} .= '-:+/*,[])}'
1387 if defined $rl_attribs->{basic_word_break_characters}
1388 and index($rl_attribs->{basic_word_break_characters}, ":") == -1;
1389 $rl_attribs->{special_prefixes} = '$@&%';
1390 $rl_attribs->{completer_word_break_characters} .= '$@&%';
1391 $rl_attribs->{completion_function} = \&db_complete;
1393 $LINEINFO = $OUT unless defined $LINEINFO;
1394 $lineinfo = $console unless defined $lineinfo;
1396 if ($term->Features->{setHistory} and "@hist" ne "?") {
1397 $term->SetHistory(@hist);
1399 ornaments($ornaments) if defined $ornaments;
1403 sub resetterm { # We forked, so we need a different TTY
1405 if (defined &get_fork_TTY) {
1407 } elsif (not defined $fork_TTY
1408 and defined $ENV{TERM} and $ENV{TERM} eq 'xterm'
1409 and defined $ENV{WINDOWID} and defined $ENV{DISPLAY}) {
1410 # Possibly _inside_ XTERM
1411 open XT, q[3>&1 xterm -title 'Forked Perl debugger' -e sh -c 'tty 1>&3;\
1416 if (defined $fork_TTY) {
1420 print $OUT "Forked, but do not know how to change a TTY.\n",
1421 "Define \$DB::fork_TTY or get_fork_TTY().\n";
1427 my $left = @typeahead;
1428 my $got = shift @typeahead;
1429 print $OUT "auto(-$left)", shift, $got, "\n";
1430 $term->AddHistory($got)
1431 if length($got) > 1 and defined $term->Features->{addHistory};
1436 $term->readline(@_);
1440 my ($opt, $val)= @_;
1441 $val = option_val($opt,'N/A');
1442 $val =~ s/([\\\'])/\\$1/g;
1443 printf $OUT "%20s = '%s'\n", $opt, $val;
1447 my ($opt, $default)= @_;
1449 if (defined $optionVars{$opt}
1450 and defined $ {$optionVars{$opt}}) {
1451 $val = $ {$optionVars{$opt}};
1452 } elsif (defined $optionAction{$opt}
1453 and defined &{$optionAction{$opt}}) {
1454 $val = &{$optionAction{$opt}}();
1455 } elsif (defined $optionAction{$opt}
1456 and not defined $option{$opt}
1457 or defined $optionVars{$opt}
1458 and not defined $ {$optionVars{$opt}}) {
1461 $val = $option{$opt};
1469 s/^(\w+)(\s*$|\W)// or print($OUT "Invalid option `$_'\n"), last;
1470 my ($opt,$sep) = ($1,$2);
1473 print($OUT "Option query `$opt?' followed by non-space `$_'\n"), last
1475 #&dump_option($opt);
1476 } elsif ($sep !~ /\S/) {
1478 } elsif ($sep eq "=") {
1481 } else { #{ to "let some poor schmuck bounce on the % key in B<vi>."
1482 my ($end) = "\\" . substr( ")]>}$sep", index("([<{",$sep), 1 ); #}
1483 s/^(([^\\$end]|\\[\\$end])*)$end($|\s+)// or
1484 print($OUT "Unclosed option value `$opt$sep$_'\n"), last;
1486 $val =~ s/\\([\\$end])/$1/g;
1490 grep( /^\Q$opt/ && ($option = $_), @options );
1491 $matches = grep( /^\Q$opt/i && ($option = $_), @options )
1493 print $OUT "Unknown option `$opt'\n" unless $matches;
1494 print $OUT "Ambiguous option `$opt'\n" if $matches > 1;
1495 $option{$option} = $val if $matches == 1 and defined $val;
1496 eval "local \$frame = 0; local \$doret = -2;
1497 require '$optionRequire{$option}'"
1498 if $matches == 1 and defined $optionRequire{$option} and defined $val;
1499 $ {$optionVars{$option}} = $val
1501 and defined $optionVars{$option} and defined $val;
1502 & {$optionAction{$option}} ($val)
1504 and defined $optionAction{$option}
1505 and defined &{$optionAction{$option}} and defined $val;
1506 &dump_option($option) if $matches == 1 && $OUT ne \*STDERR; # Not $rcfile
1512 my ($stem,@list) = @_;
1514 $ENV{"$ {stem}_n"} = @list;
1515 for $i (0 .. $#list) {
1517 $val =~ s/\\/\\\\/g;
1518 $val =~ s/([\0-\37\177\200-\377])/"\\0x" . unpack('H2',$1)/eg;
1519 $ENV{"$ {stem}_$i"} = $val;
1526 my $n = delete $ENV{"$ {stem}_n"};
1528 for $i (0 .. $n - 1) {
1529 $val = delete $ENV{"$ {stem}_$i"};
1530 $val =~ s/\\((\\)|0x(..))/ $2 ? $2 : pack('H2', $3) /ge;
1538 return; # Put nothing on the stack - malloc/free land!
1542 my($msg)= join("",@_);
1543 $msg .= ": $!\n" unless $msg =~ /\n$/;
1548 if (@_ and $term and $term->Features->{newTTY}) {
1549 my ($in, $out) = shift;
1551 ($in, $out) = split /,/, $in, 2;
1555 open IN, $in or die "cannot open `$in' for read: $!";
1556 open OUT, ">$out" or die "cannot open `$out' for write: $!";
1557 $term->newTTY(\*IN, \*OUT);
1561 } elsif ($term and @_) {
1562 &warn("Too late to set TTY, enabled on next `R'!\n");
1570 &warn("Too late to set noTTY, enabled on next `R'!\n") if @_;
1572 $notty = shift if @_;
1578 &warn("Too late to set ReadLine, enabled on next `R'!\n") if @_;
1585 if ($ {$term->Features}{tkRunning}) {
1586 return $term->tkRunning(@_);
1588 print $OUT "tkRunning not supported by current ReadLine package.\n";
1595 &warn("Too late to set up NonStop mode, enabled on next `R'!\n") if @_;
1597 $runnonstop = shift if @_;
1604 $pager="|".$pager unless $pager =~ /^(\+?\>|\|)/;
1611 $sh = quotemeta shift;
1612 $sh .= "\\b" if $sh =~ /\w$/;
1616 $psh =~ s/\\(.)/$1/g;
1622 if (defined $term) {
1623 local ($warnLevel,$dieLevel) = (0, 1);
1624 return '' unless $term->Features->{ornaments};
1625 eval { $term->ornaments(@_) } || '';
1633 $rc = quotemeta shift;
1634 $rc .= "\\b" if $rc =~ /\w$/;
1638 $prc =~ s/\\(.)/$1/g;
1644 return $lineinfo unless @_;
1646 my $stream = ($lineinfo =~ /^(\+?\>|\|)/) ? $lineinfo : ">$lineinfo";
1647 $emacs = ($stream =~ /^\|/);
1648 open(LINEINFO, "$stream") || &warn("Cannot open `$stream' for write");
1649 $LINEINFO = \*LINEINFO;
1650 my $save = select($LINEINFO);
1664 s/^Term::ReadLine::readline$/readline/;
1665 if (defined $ { $_ . '::VERSION' }) {
1666 $version{$file} = "$ { $_ . '::VERSION' } from ";
1668 $version{$file} .= $INC{$file};
1670 do 'dumpvar.pl' unless defined &main::dumpValue;
1671 if (defined &main::dumpValue) {
1673 &main::dumpValue(\%version);
1675 print $OUT "dumpvar.pl not available.\n";
1682 s [expr] Single step [in expr].
1683 n [expr] Next, steps over subroutine calls [in expr].
1684 <CR> Repeat last n or s command.
1685 r Return from current subroutine.
1686 c [line|sub] Continue; optionally inserts a one-time-only breakpoint
1687 at the specified position.
1688 l min+incr List incr+1 lines starting at min.
1689 l min-max List lines min through max.
1690 l line List single line.
1691 l subname List first window of lines from subroutine.
1692 l List next window of lines.
1693 - List previous window of lines.
1694 w [line] List window around line.
1695 . Return to the executed line.
1696 f filename Switch to viewing filename. Must be loaded.
1697 /pattern/ Search forwards for pattern; final / is optional.
1698 ?pattern? Search backwards for pattern; final ? is optional.
1699 L List all breakpoints and actions.
1700 S [[!]pattern] List subroutine names [not] matching pattern.
1701 t Toggle trace mode.
1702 t expr Trace through execution of expr.
1703 b [line] [condition]
1704 Set breakpoint; line defaults to the current execution line;
1705 condition breaks if it evaluates to true, defaults to '1'.
1706 b subname [condition]
1707 Set breakpoint at first line of subroutine.
1708 b load filename Set breakpoint on `require'ing the given file.
1709 b postpone subname [condition]
1710 Set breakpoint at first line of subroutine after
1713 Stop after the subroutine is compiled.
1714 d [line] Delete the breakpoint for line.
1715 D Delete all breakpoints.
1717 Set an action to be done before the line is executed.
1718 Sequence is: check for breakpoint, print line if necessary,
1719 do action, prompt user if breakpoint or step, evaluate line.
1720 A Delete all actions.
1721 V [pkg [vars]] List some (default all) variables in package (default current).
1722 Use ~pattern and !pattern for positive and negative regexps.
1723 X [vars] Same as \"V currentpackage [vars]\".
1724 x expr Evals expression in array context, dumps the result.
1725 m expr Evals expression in array context, prints methods callable
1726 on the first element of the result.
1727 m class Prints methods callable via the given class.
1728 O [opt[=val]] [opt\"val\"] [opt?]...
1729 Set or query values of options. val defaults to 1. opt can
1730 be abbreviated. Several options can be listed.
1731 recallCommand, ShellBang: chars used to recall command or spawn shell;
1732 pager: program for output of \"|cmd\";
1733 tkRunning: run Tk while prompting (with ReadLine);
1734 signalLevel warnLevel dieLevel: level of verbosity;
1735 inhibit_exit Allows stepping off the end of the script.
1736 The following options affect what happens with V, X, and x commands:
1737 arrayDepth, hashDepth: print only first N elements ('' for all);
1738 compactDump, veryCompact: change style of array and hash dump;
1739 globPrint: whether to print contents of globs;
1740 DumpDBFiles: dump arrays holding debugged files;
1741 DumpPackages: dump symbol tables of packages;
1742 quote, HighBit, undefPrint: change style of string dump;
1743 Option PrintRet affects printing of return value after r command,
1744 frame affects printing messages on entry and exit from subroutines.
1745 AutoTrace affects printing messages on every possible breaking point.
1746 maxTraceLen gives maximal length of evals/args listed in stack trace.
1747 ornaments affects screen appearance of the command line.
1748 During startup options are initialized from \$ENV{PERLDB_OPTS}.
1749 You can put additional initialization options TTY, noTTY,
1750 ReadLine, and NonStop there (or use `R' after you set them).
1751 < command Define Perl command to run before each prompt.
1752 << command Add to the list of Perl commands to run before each prompt.
1753 > command Define Perl command to run after each prompt.
1754 >> command Add to the list of Perl commands to run after each prompt.
1755 \{ commandline Define debugger command to run before each prompt.
1756 \{{ commandline Add to the list of debugger commands to run before each prompt.
1757 $prc number Redo a previous command (default previous command).
1758 $prc -number Redo number'th-to-last command.
1759 $prc pattern Redo last command that started with pattern.
1760 See 'O recallCommand' too.
1761 $psh$psh cmd Run cmd in a subprocess (reads from DB::IN, writes to DB::OUT)"
1762 . ( $rc eq $sh ? "" : "
1763 $psh [cmd] Run cmd in subshell (forces \"\$SHELL -c 'cmd'\")." ) . "
1764 See 'O shellBang' too.
1765 H -number Display last number commands (default all).
1766 p expr Same as \"print {DB::OUT} expr\" in current package.
1767 |dbcmd Run debugger command, piping DB::OUT to current pager.
1768 ||dbcmd Same as |dbcmd but DB::OUT is temporarilly select()ed as well.
1769 \= [alias value] Define a command alias, or list current aliases.
1770 command Execute as a perl statement in current package.
1771 v Show versions of loaded modules.
1772 R Pure-man-restart of debugger, some of debugger state
1773 and command-line options may be lost.
1774 Currently the following setting are preserved:
1775 history, breakpoints and actions, debugger Options
1776 and the following command-line options: -w, -I, -e.
1777 h [db_command] Get help [on a specific debugger command], enter |h to page.
1778 h h Summary of debugger commands.
1779 q or ^D Quit. Set \$DB::finished to 0 to debug global destruction.
1782 $summary = <<"END_SUM";
1783 List/search source lines: Control script execution:
1784 l [ln|sub] List source code T Stack trace
1785 - or . List previous/current line s [expr] Single step [in expr]
1786 w [line] List around line n [expr] Next, steps over subs
1787 f filename View source in file <CR> Repeat last n or s
1788 /pattern/ ?patt? Search forw/backw r Return from subroutine
1789 v Show versions of modules c [ln|sub] Continue until position
1790 Debugger controls: L List break pts & actions
1791 O [...] Set debugger options t [expr] Toggle trace [trace expr]
1792 <[<] or {[{] [cmd] Do before prompt b [ln/event] [c] Set breakpoint
1793 >[>] [cmd] Do after prompt b sub [c] Set breakpoint for sub
1794 $prc [N|pat] Redo a previous command d [line] Delete a breakpoint
1795 H [-num] Display last num commands D Delete all breakpoints
1796 = [a val] Define/list an alias a [ln] cmd Do cmd before line
1797 h [db_cmd] Get help on command A Delete all actions
1798 |[|]dbcmd Send output to pager $psh\[$psh\] syscmd Run cmd in a subprocess
1799 q or ^D Quit R Attempt a restart
1800 Data Examination: expr Execute perl code, also see: s,n,t expr
1801 x|m expr Evals expr in array context, dumps the result or lists methods.
1802 p expr Print expression (uses script's current package).
1803 S [[!]pat] List subroutine names [not] matching pattern
1804 V [Pk [Vars]] List Variables in Package. Vars can be ~pattern or !pattern.
1805 X [Vars] Same as \"V current_package [Vars]\".
1807 # ')}}; # Fix balance of Emacs parsing
1813 $SIG{'ABRT'} = 'DEFAULT';
1814 kill 'ABRT', $$ if $panic++;
1815 if (defined &Carp::longmess) {
1816 local $SIG{__WARN__} = '';
1817 local $Carp::CarpLevel = 2; # mydie + confess
1818 &warn(Carp::longmess("Signal @_"));
1821 print $DB::OUT "Got signal @_\n";
1829 local $SIG{__WARN__} = '';
1830 local $SIG{__DIE__} = '';
1831 eval { require Carp } if defined $^S; # If error/warning during compilation,
1832 # require may be broken.
1833 warn(@_, "\nCannot print stack trace, load with -MCarp option to see stack"),
1834 return unless defined &Carp::longmess;
1835 my ($mysingle,$mytrace) = ($single,$trace);
1836 $single = 0; $trace = 0;
1837 my $mess = Carp::longmess(@_);
1838 ($single,$trace) = ($mysingle,$mytrace);
1845 local $SIG{__DIE__} = '';
1846 local $SIG{__WARN__} = '';
1847 my $i = 0; my $ineval = 0; my $sub;
1848 if ($dieLevel > 2) {
1849 local $SIG{__WARN__} = \&dbwarn;
1850 &warn(@_); # Yell no matter what
1853 if ($dieLevel < 2) {
1854 die @_ if $^S; # in eval propagate
1856 eval { require Carp } if defined $^S; # If error/warning during compilation,
1857 # require may be broken.
1858 die(@_, "\nCannot print stack trace, load with -MCarp option to see stack")
1859 unless defined &Carp::longmess;
1860 # We do not want to debug this chunk (automatic disabling works
1861 # inside DB::DB, but not in Carp).
1862 my ($mysingle,$mytrace) = ($single,$trace);
1863 $single = 0; $trace = 0;
1864 my $mess = Carp::longmess(@_);
1865 ($single,$trace) = ($mysingle,$mytrace);
1871 $prevwarn = $SIG{__WARN__} unless $warnLevel;
1874 $SIG{__WARN__} = \&DB::dbwarn;
1876 $SIG{__WARN__} = $prevwarn;
1884 $prevdie = $SIG{__DIE__} unless $dieLevel;
1887 $SIG{__DIE__} = \&DB::dbdie; # if $dieLevel < 2;
1888 #$SIG{__DIE__} = \&DB::diehard if $dieLevel >= 2;
1889 print $OUT "Stack dump during die enabled",
1890 ( $dieLevel == 1 ? " outside of evals" : ""), ".\n"
1892 print $OUT "Dump printed too.\n" if $dieLevel > 2;
1894 $SIG{__DIE__} = $prevdie;
1895 print $OUT "Default die handler restored.\n";
1903 $prevsegv = $SIG{SEGV} unless $signalLevel;
1904 $prevbus = $SIG{BUS} unless $signalLevel;
1905 $signalLevel = shift;
1907 $SIG{SEGV} = \&DB::diesignal;
1908 $SIG{BUS} = \&DB::diesignal;
1910 $SIG{SEGV} = $prevsegv;
1911 $SIG{BUS} = $prevbus;
1919 return unless defined &$subr;
1921 $subr = \&$subr; # Hard reference
1924 $s = $_, last if $subr eq \&$_;
1932 $class = ref $class if ref $class;
1935 methods_via($class, '', 1);
1936 methods_via('UNIVERSAL', 'UNIVERSAL', 0);
1941 return if $packs{$class}++;
1943 my $prepend = $prefix ? "via $prefix: " : '';
1945 for $name (grep {defined &{$ {"$ {class}::"}{$_}}}
1946 sort keys %{"$ {class}::"}) {
1947 next if $seen{ $name }++;
1948 print $DB::OUT "$prepend$name\n";
1950 return unless shift; # Recurse?
1951 for $name (@{"$ {class}::ISA"}) {
1952 $prepend = $prefix ? $prefix . " -> $name" : $name;
1953 methods_via($name, $prepend, 1);
1957 # The following BEGIN is very handy if debugger goes havoc, debugging debugger?
1959 BEGIN { # This does not compile, alas.
1960 $IN = \*STDIN; # For bugs before DB::OUT has been opened
1961 $OUT = \*STDERR; # For errors before DB::OUT has been opened
1965 $deep = 100; # warning if stack gets this deep
1969 $SIG{INT} = \&DB::catch;
1970 # This may be enabled to debug debugger:
1971 #$warnLevel = 1 unless defined $warnLevel;
1972 #$dieLevel = 1 unless defined $dieLevel;
1973 #$signalLevel = 1 unless defined $signalLevel;
1975 $db_stop = 0; # Compiler warning
1977 $level = 0; # Level of recursive debugging
1978 # @stack and $doret are needed in sub sub, which is called for DB::postponed.
1979 # Triggers bug (?) in perl is we postpone this until runtime:
1980 @postponed = @stack = (0);
1985 BEGIN {$^W = $ini_warn;} # Switch warnings back
1987 #use Carp; # This did break, left for debuggin
1990 # Specific code for b c l V m f O, &blah, $blah, @blah, %blah
1991 my($text, $line, $start) = @_;
1992 my ($itext, $search, $prefix, $pack) =
1993 ($text, "^\Q$ {'package'}::\E([^:]+)\$");
1995 return sort grep /^\Q$text/, (keys %sub), qw(postpone load compile), # subroutines
1996 (map { /$search/ ? ($1) : () } keys %sub)
1997 if (substr $line, 0, $start) =~ /^\|*[blc]\s+((postpone|compile)\s+)?$/;
1998 return sort grep /^\Q$text/, values %INC # files
1999 if (substr $line, 0, $start) =~ /^\|*b\s+load\s+$/;
2000 return sort map {($_, db_complete($_ . "::", "V ", 2))}
2001 grep /^\Q$text/, map { /^(.*)::$/ ? ($1) : ()} keys %:: # top-packages
2002 if (substr $line, 0, $start) =~ /^\|*[Vm]\s+$/ and $text =~ /^\w*$/;
2003 return sort map {($_, db_complete($_ . "::", "V ", 2))}
2005 grep /^\Q$text/, map { /^(.*)::$/ ? ($prefix . "::$1") : ()} keys %{$prefix . '::'}
2007 if (substr $line, 0, $start) =~ /^\|*[Vm]\s+$/
2008 and $text =~ /^(.*[^:])::?(\w*)$/ and $prefix = $1;
2009 if ( $line =~ /^\|*f\s+(.*)/ ) { # Loaded files
2010 # We may want to complete to (eval 9), so $text may be wrong
2011 $prefix = length($1) - length($text);
2014 map {substr $_, 2 + $prefix} grep /^_<\Q$text/, (keys %main::), $0
2016 if ((substr $text, 0, 1) eq '&') { # subroutines
2017 $text = substr $text, 1;
2019 return sort map "$prefix$_",
2022 (map { /$search/ ? ($1) : () }
2025 if ($text =~ /^[\$@%](.*)::(.*)/) { # symbols in a package
2026 $pack = ($1 eq 'main' ? '' : $1) . '::';
2027 $prefix = (substr $text, 0, 1) . $1 . '::';
2030 = map "$prefix$_", grep /^\Q$text/, grep /^_?[a-zA-Z]/, keys %$pack ;
2031 if (@out == 1 and $out[0] =~ /::$/ and $out[0] ne $itext) {
2032 return db_complete($out[0], $line, $start);
2036 if ($text =~ /^[\$@%]/) { # symbols (in $package + packages in main)
2037 $pack = ($package eq 'main' ? '' : $package) . '::';
2038 $prefix = substr $text, 0, 1;
2039 $text = substr $text, 1;
2040 my @out = map "$prefix$_", grep /^\Q$text/,
2041 (grep /^_?[a-zA-Z]/, keys %$pack),
2042 ( $pack eq '::' ? () : (grep /::$/, keys %::) ) ;
2043 if (@out == 1 and $out[0] =~ /::$/ and $out[0] ne $itext) {
2044 return db_complete($out[0], $line, $start);
2048 if ((substr $line, 0, $start) =~ /^\|*O\b.*\s$/) { # Options after a space
2049 my @out = grep /^\Q$text/, @options;
2050 my $val = option_val($out[0], undef);
2052 if (not defined $val or $val =~ /[\n\r]/) {
2053 # Can do nothing better
2054 } elsif ($val =~ /\s/) {
2056 foreach $l (split //, qq/\"\'\#\|/) {
2057 $out = "$l$val$l ", last if (index $val, $l) == -1;
2062 # Default to value if one completion, to question if many
2063 $rl_attribs->{completer_terminator_character} = (@out == 1 ? $out : '? ');
2066 return $term->filename_list($text); # filenames
2070 print $OUT "Use `q' to quit or `R' to restart. `h q' for details.\n"
2074 $finished = $inhibit_exit; # So that some keys may be disabled.
2075 # Do not stop in at_exit() and destructors on exit:
2076 $DB::single = !$exiting && !$runnonstop;
2077 DB::fake::at_exit() unless $exiting or $runnonstop;
2083 "Debugged program terminated. Use `q' to quit or `R' to restart.";
2086 package DB; # Do not trace this 1; below!