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)
320 ####################################################################
322 # Needed for the statement after exec():
324 BEGIN { $ini_warn = $^W; $^W = 0 } # Switch compilation warnings off until another BEGIN.
325 local($^W) = 0; # Switch run-time warnings off during init.
328 $dumpvar::arrayDepth,
329 $dumpvar::dumpDBFiles,
330 $dumpvar::dumpPackages,
331 $dumpvar::quoteHighBit,
332 $dumpvar::printUndef,
341 # Command-line + PERLLIB:
344 # $prevwarn = $prevdie = $prevbus = $prevsegv = ''; # Does not help?!
346 $trace = $signal = $single = 0; # Uninitialized warning suppression
347 # (local $^W cannot help - other packages!).
348 $inhibit_exit = $option{PrintRet} = 1;
350 @options = qw(hashDepth arrayDepth CommandSet dumpDepth
351 DumpDBFiles DumpPackages DumpReused
352 compactDump veryCompact quote HighBit undefPrint
353 globPrint PrintRet UsageOnly frame AutoTrace
354 TTY noTTY ReadLine NonStop LineInfo maxTraceLen
355 recallCommand ShellBang pager tkRunning ornaments
356 signalLevel warnLevel dieLevel inhibit_exit
357 ImmediateStop bareStringify CreateTTY
358 RemotePort windowSize);
361 hashDepth => \$dumpvar::hashDepth,
362 arrayDepth => \$dumpvar::arrayDepth,
363 CommandSet => \$CommandSet,
364 DumpDBFiles => \$dumpvar::dumpDBFiles,
365 DumpPackages => \$dumpvar::dumpPackages,
366 DumpReused => \$dumpvar::dumpReused,
367 HighBit => \$dumpvar::quoteHighBit,
368 undefPrint => \$dumpvar::printUndef,
369 globPrint => \$dumpvar::globPrint,
370 UsageOnly => \$dumpvar::usageOnly,
371 CreateTTY => \$CreateTTY,
372 bareStringify => \$dumpvar::bareStringify,
374 AutoTrace => \$trace,
375 inhibit_exit => \$inhibit_exit,
376 maxTraceLen => \$maxtrace,
377 ImmediateStop => \$ImmediateStop,
378 RemotePort => \$remoteport,
379 windowSize => \$window,
383 compactDump => \&dumpvar::compactDump,
384 veryCompact => \&dumpvar::veryCompact,
385 quote => \&dumpvar::quote,
388 ReadLine => \&ReadLine,
389 NonStop => \&NonStop,
390 LineInfo => \&LineInfo,
391 recallCommand => \&recallCommand,
392 ShellBang => \&shellBang,
394 signalLevel => \&signalLevel,
395 warnLevel => \&warnLevel,
396 dieLevel => \&dieLevel,
397 tkRunning => \&tkRunning,
398 ornaments => \&ornaments,
399 RemotePort => \&RemotePort,
403 compactDump => 'dumpvar.pl',
404 veryCompact => 'dumpvar.pl',
405 quote => 'dumpvar.pl',
408 # These guys may be defined in $ENV{PERL5DB} :
409 $rl = 1 unless defined $rl;
410 $warnLevel = 1 unless defined $warnLevel;
411 $dieLevel = 1 unless defined $dieLevel;
412 $signalLevel = 1 unless defined $signalLevel;
413 $pre = [] unless defined $pre;
414 $post = [] unless defined $post;
415 $pretype = [] unless defined $pretype;
416 $CreateTTY = 3 unless defined $CreateTTY;
417 $CommandSet = '580' unless defined $CommandSet;
419 warnLevel($warnLevel);
421 signalLevel($signalLevel);
424 defined $ENV{PAGER} ? $ENV{PAGER} :
425 eval { require Config } &&
426 defined $Config::Config{pager} ? $Config::Config{pager}
428 ) unless defined $pager;
430 &recallCommand("!") unless defined $prc;
431 &shellBang("!") unless defined $psh;
433 $maxtrace = 400 unless defined $maxtrace;
434 $ini_pids = $ENV{PERLDB_PIDS};
435 if (defined $ENV{PERLDB_PIDS}) {
436 $pids = "[$ENV{PERLDB_PIDS}]";
437 $ENV{PERLDB_PIDS} .= "->$$";
440 $ENV{PERLDB_PIDS} = "$$";
445 *emacs = $slave_editor if $slave_editor; # May be used in afterinit()...
447 if (-e "/dev/tty") { # this is the wrong metric!
450 $rcfile="perldb.ini";
453 # This isn't really safe, because there's a race
454 # between checking and opening. The solution is to
455 # open and fstat the handle, but then you have to read and
456 # eval the contents. But then the silly thing gets
457 # your lexical scope, which is unfortunately at best.
461 # Just exactly what part of the word "CORE::" don't you understand?
462 local $SIG{__WARN__};
465 unless (is_safe_file($file)) {
466 CORE::warn <<EO_GRIPE;
467 perldb: Must not source insecure rcfile $file.
468 You or the superuser must be the owner, and it must not
469 be writable by anyone but its owner.
475 CORE::warn("perldb: couldn't parse $file: $@") if $@;
479 # Verifies that owner is either real user or superuser and that no
480 # one but owner may write to it. This function is of limited use
481 # when called on a path instead of upon a handle, because there are
482 # no guarantees that filename (by dirent) whose file (by ino) is
483 # eventually accessed is the same as the one tested.
484 # Assumes that the file's existence is not in doubt.
487 stat($path) || return; # mysteriously vaporized
488 my($dev,$ino,$mode,$nlink,$uid,$gid) = stat(_);
490 return 0 if $uid != 0 && $uid != $<;
491 return 0 if $mode & 022;
496 safe_do("./$rcfile");
498 elsif (defined $ENV{HOME} && -f "$ENV{HOME}/$rcfile") {
499 safe_do("$ENV{HOME}/$rcfile");
501 elsif (defined $ENV{LOGDIR} && -f "$ENV{LOGDIR}/$rcfile") {
502 safe_do("$ENV{LOGDIR}/$rcfile");
505 if (defined $ENV{PERLDB_OPTS}) {
506 parse_options($ENV{PERLDB_OPTS});
509 if ( not defined &get_fork_TTY and defined $ENV{TERM} and $ENV{TERM} eq 'xterm'
510 and defined $ENV{WINDOWID} and defined $ENV{DISPLAY} ) { # _inside_ XTERM?
511 *get_fork_TTY = \&xterm_get_fork_TTY;
512 } elsif ($^O eq 'os2') {
513 *get_fork_TTY = \&os2_get_fork_TTY;
516 # Here begin the unreadable code. It needs fixing.
518 if (exists $ENV{PERLDB_RESTART}) {
519 delete $ENV{PERLDB_RESTART};
521 @hist = get_list('PERLDB_HIST');
522 %break_on_load = get_list("PERLDB_ON_LOAD");
523 %postponed = get_list("PERLDB_POSTPONE");
524 my @had_breakpoints= get_list("PERLDB_VISITED");
525 for (0 .. $#had_breakpoints) {
526 my %pf = get_list("PERLDB_FILE_$_");
527 $postponed_file{$had_breakpoints[$_]} = \%pf if %pf;
529 my %opt = get_list("PERLDB_OPT");
531 while (($opt,$val) = each %opt) {
532 $val =~ s/[\\\']/\\$1/g;
533 parse_options("$opt'$val'");
535 @INC = get_list("PERLDB_INC");
537 $pretype = [get_list("PERLDB_PRETYPE")];
538 $pre = [get_list("PERLDB_PRE")];
539 $post = [get_list("PERLDB_POST")];
540 @typeahead = get_list("PERLDB_TYPEAHEAD", @typeahead);
546 # Is Perl being run from a slave editor or graphical debugger?
547 $slave_editor = ((defined $main::ARGV[0]) and ($main::ARGV[0] eq '-emacs'));
548 $rl = 0, shift(@main::ARGV) if $slave_editor;
550 #require Term::ReadLine;
552 if ($^O eq 'cygwin') {
553 # /dev/tty is binary. use stdin for textmode
555 } elsif (-e "/dev/tty") {
556 $console = "/dev/tty";
557 } elsif ($^O eq 'dos' or -e "con" or $^O eq 'MSWin32') {
559 } elsif ($^O eq 'MacOS') {
560 if ($MacPerl::Version !~ /MPW/) {
561 $console = "Dev:Console:Perl Debug"; # Separate window for application
563 $console = "Dev:Console";
566 $console = "sys\$command";
569 if (($^O eq 'MSWin32') and ($slave_editor or defined $ENV{EMACS})) {
573 if ($^O eq 'NetWare') {
578 if (defined $ENV{OS2_SHELL} and ($slave_editor or $ENV{WINDOWID})) { # In OS/2
586 $console = $tty if defined $tty;
588 if (defined $remoteport) {
590 $OUT = new IO::Socket::INET( Timeout => '10',
591 PeerAddr => $remoteport,
594 if (!$OUT) { die "Unable to connect to remote host: $remoteport\n"; }
597 create_IN_OUT(4) if $CreateTTY & 4;
599 my ($i, $o) = split /,/, $console;
600 $o = $i unless defined $o;
601 open(IN,"+<$i") || open(IN,"<$i") || open(IN,"<&STDIN");
602 open(OUT,"+>$o") || open(OUT,">$o") || open(OUT,">&STDERR")
603 || open(OUT,">&STDOUT"); # so we don't dongle stdout
604 } elsif (not defined $console) {
606 open(OUT,">&STDERR") || open(OUT,">&STDOUT"); # so we don't dongle stdout
607 $console = 'STDIN/OUT';
609 # so open("|more") can read from STDOUT and so we don't dingle stdin
610 $IN = \*IN, $OUT = \*OUT if $console or not defined $console;
612 my $previous = select($OUT);
613 $| = 1; # for DB::OUT
616 $LINEINFO = $OUT unless defined $LINEINFO;
617 $lineinfo = $console unless defined $lineinfo;
619 $header =~ s/.Header: ([^,]+),v(\s+\S+\s+\S+).*$/$1$2/;
620 unless ($runnonstop) {
623 if ($term_pid eq '-1') {
624 print $OUT "\nDaughter DB session started...\n";
626 print $OUT "\nLoading DB routines from $header\n";
627 print $OUT ("Editor support ",
628 $slave_editor ? "enabled" : "available",
630 print $OUT "\nEnter h or `h h' for help, or `$doccmd perldebug' for more help.\n\n";
638 s/(.*)/'$1'/ unless /^-?[\d.]+$/;
641 if (defined &afterinit) { # May be defined in $rcfile
647 ############################################################ Subroutines
650 # _After_ the perl program is compiled, $single is set to 1:
651 if ($single and not $second_time++) {
652 if ($runnonstop) { # Disable until signal
653 for ($i=0; $i <= $stack_depth; ) {
657 # return; # Would not print trace!
658 } elsif ($ImmediateStop) {
663 $runnonstop = 0 if $single or $signal; # Disable it if interactive.
665 ($package, $filename, $line) = caller;
666 $filename_ini = $filename;
667 $usercontext = '($@, $!, $^E, $,, $/, $\, $^W) = @saved;' .
668 "package $package;"; # this won't let them modify, alas
669 local(*dbline) = $main::{'_<' . $filename};
671 # we need to check for pseudofiles on Mac OS (these are files
672 # not attached to a filename, but instead stored in Dev:Pseudo)
673 if ($^O eq 'MacOS' && $#dbline < 0) {
674 $filename_ini = $filename = 'Dev:Pseudo';
675 *dbline = $main::{'_<' . $filename};
679 if ($dbline{$line} && (($stop,$action) = split(/\0/,$dbline{$line}))) {
683 $evalarg = "\$DB::signal |= 1 if do {$stop}"; &eval;
684 $dbline{$line} =~ s/;9($|\0)/$1/;
687 my $was_signal = $signal;
689 for (my $n = 0; $n <= $#to_watch; $n++) {
690 $evalarg = $to_watch[$n];
691 local $onetimeDump; # Do not output results
692 my ($val) = &eval; # Fix context (&eval is doing array)?
693 $val = ( (defined $val) ? "'$val'" : 'undef' );
694 if ($val ne $old_watch[$n]) {
697 Watchpoint $n:\t$to_watch[$n] changed:
698 old value:\t$old_watch[$n]
701 $old_watch[$n] = $val;
705 if ($trace & 4) { # User-installed watch
706 return if watchfunction($package, $filename, $line)
707 and not $single and not $was_signal and not ($trace & ~4);
709 $was_signal = $signal;
711 if ($single || ($trace & 1) || $was_signal) {
713 $position = "\032\032$filename:$line:0\n";
714 print_lineinfo($position);
715 } elsif ($package eq 'DB::fake') {
718 Debugged program terminated. Use B<q> to quit or B<R> to restart,
719 use B<O> I<inhibit_exit> to avoid stopping after program termination,
720 B<h q>, B<h R> or B<h O> to get additional info.
723 $usercontext = '($@, $!, $^E, $,, $/, $\, $^W) = @saved;' .
724 "package $package;"; # this won't let them modify, alas
727 $prefix = $sub =~ /::/ ? "" : "${'package'}::";
728 $prefix .= "$sub($filename:";
729 $after = ($dbline[$line] =~ /\n$/ ? '' : "\n");
730 if (length($prefix) > 30) {
731 $position = "$prefix$line):\n$line:\t$dbline[$line]$after";
736 $position = "$prefix$line$infix$dbline[$line]$after";
739 print_lineinfo(' ' x $stack_depth, "$line:\t$dbline[$line]$after");
741 print_lineinfo($position);
743 for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { #{ vi
744 last if $dbline[$i] =~ /^\s*[\;\}\#\n]/;
746 $after = ($dbline[$i] =~ /\n$/ ? '' : "\n");
747 $incr_pos = "$prefix$i$infix$dbline[$i]$after";
748 $position .= $incr_pos;
750 print_lineinfo(' ' x $stack_depth, "$i:\t$dbline[$i]$after");
752 print_lineinfo($incr_pos);
757 $evalarg = $action, &eval if $action;
758 if ($single || $was_signal) {
759 local $level = $level + 1;
760 foreach $evalarg (@$pre) {
763 print $OUT $stack_depth . " levels deep in subroutine calls!\n"
766 $incr = -1; # for backward motion.
767 @typeahead = (@$pretype, @typeahead);
769 while (($term || &setterm),
770 ($term_pid == $$ or resetterm(1)),
771 defined ($cmd=&readline("$pidprompt DB" . ('<' x $level) .
772 ($#hist+1) . ('>' x $level) . " ")))
776 $cmd =~ s/\\$/\n/ && do {
777 $cmd .= &readline(" cont: ");
780 $cmd =~ /^$/ && ($cmd = $laststep);
781 push(@hist,$cmd) if length($cmd) > 1;
783 $cmd =~ s/^\s+//s; # trim annoying leading whitespace
784 $cmd =~ s/\s+$//s; # trim annoying trailing whitespace
785 ($i) = split(/\s+/,$cmd);
787 # squelch the sigmangler
789 local $SIG{__WARN__};
790 eval "\$cmd =~ $alias{$i}";
793 print $OUT "Couldn't evaluate `$i' alias: $@";
797 $cmd =~ /^q$/ && do {
802 $cmd =~ /^t$/ && do {
805 print $OUT "Trace = " .
806 (($trace & 1) ? "on" : "off" ) . "\n";
808 $cmd =~ /^S(\s+(!)?(.+))?$/ && do {
809 $Srev = defined $2; $Spatt = $3; $Snocheck = ! defined $1;
812 foreach $subname (sort(keys %sub)) {
813 if ($Snocheck or $Srev^($subname =~ /$Spatt/)) {
814 print $OUT $subname,"\n";
818 $cmd =~ s/^X\b/V $package/;
819 $cmd =~ /^V$/ && do {
820 $cmd = "V $package"; };
821 $cmd =~ /^V\b\s*(\S+)\s*(.*)/ && do {
822 local ($savout) = select($OUT);
824 @vars = split(' ',$2);
825 do 'dumpvar.pl' unless defined &main::dumpvar;
826 if (defined &main::dumpvar) {
829 # must detect sigpipe failures
830 eval { &main::dumpvar($packname,@vars) };
832 die unless $@ =~ /dumpvar print failed/;
835 print $OUT "dumpvar.pl not available.\n";
839 $cmd =~ s/^x\b/ / && do { # So that will be evaled
840 $onetimeDump = 'dump';
841 # handle special "x 3 blah" syntax
842 if ($cmd =~ s/^\s*(\d+)(?=\s)/ /) {
843 $onetimedumpDepth = $1;
846 $cmd =~ s/^m\s+([\w:]+)\s*$/ / && do {
847 methods($1); next CMD};
848 $cmd =~ s/^m\b/ / && do { # So this will be evaled
849 $onetimeDump = 'methods'; };
850 $cmd =~ /^f\b\s*(.*)/ && do {
854 print $OUT "The old f command is now the r command.\n"; # hint
855 print $OUT "The new f command switches filenames.\n";
858 if (!defined $main::{'_<' . $file}) {
859 if (($try) = grep(m#^_<.*$file#, keys %main::)) {{
860 $try = substr($try,2);
861 print $OUT "Choosing $try matching `$file':\n";
865 if (!defined $main::{'_<' . $file}) {
866 print $OUT "No file matching `$file' is loaded.\n";
868 } elsif ($file ne $filename) {
869 *dbline = $main::{'_<' . $file};
875 print $OUT "Already in $file.\n";
879 $cmd =~ /^\.$/ && do {
880 $incr = -1; # for backward motion.
882 $filename = $filename_ini;
883 *dbline = $main::{'_<' . $filename};
885 print_lineinfo($position);
887 $cmd =~ /^-$/ && do {
888 $start -= $incr + $window + 1;
889 $start = 1 if $start <= 0;
891 $cmd = 'l ' . ($start) . '+'; };
893 $cmd =~ /^([aAbBDhlLMoOvwW])\b\s*(.*)/s && do {
894 &cmd_wrapper($1, $2, $line);
898 $cmd =~ /^\<\<\s*(.*)/ && do { # \<\< for CPerl sake: not HERE
899 push @$pre, action($1);
901 $cmd =~ /^>>\s*(.*)/ && do {
902 push @$post, action($1);
904 $cmd =~ /^<\s*(.*)/ && do {
906 print $OUT "All < actions cleared.\n";
912 print $OUT "No pre-prompt Perl actions.\n";
915 print $OUT "Perl commands run before each prompt:\n";
916 for my $action ( @$pre ) {
917 print $OUT "\t< -- $action\n";
923 $cmd =~ /^>\s*(.*)/ && do {
925 print $OUT "All > actions cleared.\n";
931 print $OUT "No post-prompt Perl actions.\n";
934 print $OUT "Perl commands run after each prompt:\n";
935 for my $action ( @$post ) {
936 print $OUT "\t> -- $action\n";
940 $post = [action($1)];
942 $cmd =~ /^\{\{\s*(.*)/ && do {
943 if ($cmd =~ /^\{.*\}$/ && unbalanced(substr($cmd,2))) {
944 print $OUT "{{ is now a debugger command\n",
945 "use `;{{' if you mean Perl code\n";
951 $cmd =~ /^\{\s*(.*)/ && do {
953 print $OUT "All { actions cleared.\n";
959 print $OUT "No pre-prompt debugger actions.\n";
962 print $OUT "Debugger commands run before each prompt:\n";
963 for my $action ( @$pretype ) {
964 print $OUT "\t{ -- $action\n";
968 if ($cmd =~ /^\{.*\}$/ && unbalanced(substr($cmd,1))) {
969 print $OUT "{ is now a debugger command\n",
970 "use `;{' if you mean Perl code\n";
976 $cmd =~ /^n$/ && do {
977 end_report(), next CMD if $finished and $level <= 1;
981 $cmd =~ /^s$/ && do {
982 end_report(), next CMD if $finished and $level <= 1;
986 $cmd =~ /^c\b\s*([\w:]*)\s*$/ && do {
987 end_report(), next CMD if $finished and $level <= 1;
989 # Probably not needed, since we finish an interactive
990 # sub-session anyway...
991 # local $filename = $filename;
992 # local *dbline = *dbline; # XXX Would this work?!
993 if ($subname =~ /\D/) { # subroutine name
994 $subname = $package."::".$subname
995 unless $subname =~ /::/;
996 ($file,$i) = (find_sub($subname) =~ /^(.*):(.*)$/);
1000 *dbline = $main::{'_<' . $filename};
1001 $had_breakpoints{$filename} |= 1;
1003 ++$i while $dbline[$i] == 0 && $i < $max;
1005 print $OUT "Subroutine $subname not found.\n";
1010 if ($dbline[$i] == 0) {
1011 print $OUT "Line $i not breakable.\n";
1014 $dbline{$i} =~ s/($|\0)/;9$1/; # add one-time-only b.p.
1016 for ($i=0; $i <= $stack_depth; ) {
1020 $cmd =~ /^r$/ && do {
1021 end_report(), next CMD if $finished and $level <= 1;
1022 $stack[$stack_depth] |= 1;
1023 $doret = $option{PrintRet} ? $stack_depth - 1 : -2;
1025 $cmd =~ /^R$/ && do {
1026 print $OUT "Warning: some settings and command-line options may be lost!\n";
1027 my (@script, @flags, $cl);
1028 push @flags, '-w' if $ini_warn;
1029 # Put all the old includes at the start to get
1030 # the same debugger.
1032 push @flags, '-I', $_;
1034 push @flags, '-T' if ${^TAINT};
1035 # Arrange for setting the old INC:
1036 set_list("PERLDB_INC", @ini_INC);
1038 for (1..$#{'::_<-e'}) { # The first line is PERL5DB
1039 chomp ($cl = ${'::_<-e'}[$_]);
1040 push @script, '-e', $cl;
1045 set_list("PERLDB_HIST",
1046 $term->Features->{getHistory}
1047 ? $term->GetHistory : @hist);
1048 my @had_breakpoints = keys %had_breakpoints;
1049 set_list("PERLDB_VISITED", @had_breakpoints);
1050 set_list("PERLDB_OPT", %option);
1051 set_list("PERLDB_ON_LOAD", %break_on_load);
1053 for (0 .. $#had_breakpoints) {
1054 my $file = $had_breakpoints[$_];
1055 *dbline = $main::{'_<' . $file};
1056 next unless %dbline or $postponed_file{$file};
1057 (push @hard, $file), next
1058 if $file =~ /^\(\w*eval/;
1060 @add = %{$postponed_file{$file}}
1061 if $postponed_file{$file};
1062 set_list("PERLDB_FILE_$_", %dbline, @add);
1064 for (@hard) { # Yes, really-really...
1065 # Find the subroutines in this eval
1066 *dbline = $main::{'_<' . $_};
1067 my ($quoted, $sub, %subs, $line) = quotemeta $_;
1068 for $sub (keys %sub) {
1069 next unless $sub{$sub} =~ /^$quoted:(\d+)-(\d+)$/;
1070 $subs{$sub} = [$1, $2];
1074 "No subroutines in $_, ignoring breakpoints.\n";
1077 LINES: for $line (keys %dbline) {
1078 # One breakpoint per sub only:
1079 my ($offset, $sub, $found);
1080 SUBS: for $sub (keys %subs) {
1081 if ($subs{$sub}->[1] >= $line # Not after the subroutine
1082 and (not defined $offset # Not caught
1083 or $offset < 0 )) { # or badly caught
1085 $offset = $line - $subs{$sub}->[0];
1086 $offset = "+$offset", last SUBS if $offset >= 0;
1089 if (defined $offset) {
1090 $postponed{$found} =
1091 "break $offset if $dbline{$line}";
1093 print $OUT "Breakpoint in $_:$line ignored: after all the subroutines.\n";
1097 set_list("PERLDB_POSTPONE", %postponed);
1098 set_list("PERLDB_PRETYPE", @$pretype);
1099 set_list("PERLDB_PRE", @$pre);
1100 set_list("PERLDB_POST", @$post);
1101 set_list("PERLDB_TYPEAHEAD", @typeahead);
1102 $ENV{PERLDB_RESTART} = 1;
1103 delete $ENV{PERLDB_PIDS}; # Restore ini state
1104 $ENV{PERLDB_PIDS} = $ini_pids if defined $ini_pids;
1105 #print "$^X, '-d', @flags, @script, ($slave_editor ? '-emacs' : ()), @ARGS";
1106 exec($^X, '-d', @flags, @script, ($slave_editor ? '-emacs' : ()), @ARGS) ||
1107 print $OUT "exec failed: $!\n";
1109 $cmd =~ /^T$/ && do {
1110 print_trace($OUT, 1); # skip DB
1112 $cmd =~ /^w\b\s*(.*)/s && do { &cmd_w($1); next CMD; };
1113 $cmd =~ /^W\b\s*(.*)/s && do { &cmd_W($1); next CMD; };
1114 $cmd =~ /^\/(.*)$/ && do {
1116 $inpat =~ s:([^\\])/$:$1:;
1118 # squelch the sigmangler
1119 local $SIG{__DIE__};
1120 local $SIG{__WARN__};
1121 eval '$inpat =~ m'."\a$inpat\a";
1133 $start = 1 if ($start > $max);
1134 last if ($start == $end);
1135 if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) {
1136 if ($slave_editor) {
1137 print $OUT "\032\032$filename:$start:0\n";
1139 print $OUT "$start:\t", $dbline[$start], "\n";
1144 print $OUT "/$pat/: not found\n" if ($start == $end);
1146 $cmd =~ /^\?(.*)$/ && do {
1148 $inpat =~ s:([^\\])\?$:$1:;
1150 # squelch the sigmangler
1151 local $SIG{__DIE__};
1152 local $SIG{__WARN__};
1153 eval '$inpat =~ m'."\a$inpat\a";
1165 $start = $max if ($start <= 0);
1166 last if ($start == $end);
1167 if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) {
1168 if ($slave_editor) {
1169 print $OUT "\032\032$filename:$start:0\n";
1171 print $OUT "$start:\t", $dbline[$start], "\n";
1176 print $OUT "?$pat?: not found\n" if ($start == $end);
1178 $cmd =~ /^$rc+\s*(-)?(\d+)?$/ && do {
1179 pop(@hist) if length($cmd) > 1;
1180 $i = $1 ? ($#hist-($2||1)) : ($2||$#hist);
1182 print $OUT $cmd, "\n";
1184 $cmd =~ /^$sh$sh\s*([\x00-\xff]*)/ && do {
1187 $cmd =~ /^$rc([^$rc].*)$/ && do {
1189 pop(@hist) if length($cmd) > 1;
1190 for ($i = $#hist; $i; --$i) {
1191 last if $hist[$i] =~ /$pat/;
1194 print $OUT "No such command!\n\n";
1198 print $OUT $cmd, "\n";
1200 $cmd =~ /^$sh$/ && do {
1201 &system($ENV{SHELL}||"/bin/sh");
1203 $cmd =~ /^$sh\s*([\x00-\xff]*)/ && do {
1204 # XXX: using csh or tcsh destroys sigint retvals!
1205 #&system($1); # use this instead
1206 &system($ENV{SHELL}||"/bin/sh","-c",$1);
1208 $cmd =~ /^H\b\s*(-(\d+))?/ && do {
1209 $end = $2 ? ($#hist-$2) : 0;
1210 $hist = 0 if $hist < 0;
1211 for ($i=$#hist; $i>$end; $i--) {
1212 print $OUT "$i: ",$hist[$i],"\n"
1213 unless $hist[$i] =~ /^.?$/;
1216 $cmd =~ /^(?:man|(?:perl)?doc)\b(?:\s+([^(]*))?$/ && do {
1219 $cmd =~ s/^p$/print {\$DB::OUT} \$_/;
1220 $cmd =~ s/^p\b/print {\$DB::OUT} /;
1221 $cmd =~ s/^=\s*// && do {
1223 if (length $cmd == 0) {
1224 @keys = sort keys %alias;
1225 } elsif (my($k,$v) = ($cmd =~ /^(\S+)\s+(\S.*)/)) {
1226 # can't use $_ or kill //g state
1227 for my $x ($k, $v) { $x =~ s/\a/\\a/g }
1228 $alias{$k} = "s\a$k\a$v\a";
1229 # squelch the sigmangler
1230 local $SIG{__DIE__};
1231 local $SIG{__WARN__};
1232 unless (eval "sub { s\a$k\a$v\a }; 1") {
1233 print $OUT "Can't alias $k to $v: $@\n";
1242 if ((my $v = $alias{$k}) =~ s
\as\a$k\a(.*)\a$
\a1
\a) {
1243 print $OUT "$k\t= $1\n";
1245 elsif (defined $alias{$k}) {
1246 print $OUT "$k\t$alias{$k}\n";
1249 print "No alias for $k\n";
1253 $cmd =~ /^\@\s*(.*\S)/ && do {
1254 if (open my $fh, $1) {
1257 &warn("Can't execute `$1': $!\n");
1260 $cmd =~ /^\|\|?\s*[^|]/ && do {
1261 if ($pager =~ /^\|/) {
1262 open(SAVEOUT,">&STDOUT") || &warn("Can't save STDOUT");
1263 open(STDOUT,">&OUT") || &warn("Can't redirect STDOUT");
1265 open(SAVEOUT,">&OUT") || &warn("Can't save DB::OUT");
1268 unless ($piped=open(OUT,$pager)) {
1269 &warn("Can't pipe output to `$pager'");
1270 if ($pager =~ /^\|/) {
1271 open(OUT,">&STDOUT") # XXX: lost message
1272 || &warn("Can't restore DB::OUT");
1273 open(STDOUT,">&SAVEOUT")
1274 || &warn("Can't restore STDOUT");
1277 open(OUT,">&STDOUT") # XXX: lost message
1278 || &warn("Can't restore DB::OUT");
1282 $SIG{PIPE}= \&DB::catch if $pager =~ /^\|/
1283 && ("" eq $SIG{PIPE} || "DEFAULT" eq $SIG{PIPE});
1284 $selected= select(OUT);
1286 select( $selected ), $selected= "" unless $cmd =~ /^\|\|/;
1287 $cmd =~ s/^\|+\s*//;
1290 # XXX Local variants do not work!
1291 $cmd =~ s/^t\s/\$DB::trace |= 1;\n/;
1292 $cmd =~ s/^s\s/\$DB::single = 1;\n/ && do {$laststep = 's'};
1293 $cmd =~ s/^n\s/\$DB::single = 2;\n/ && do {$laststep = 'n'};
1295 $evalarg = "\$^D = \$^D | \$DB::db_stop;\n$cmd"; &eval;
1297 $onetimeDump = undef;
1298 $onetimedumpDepth = undef;
1299 } elsif ($term_pid == $$) {
1304 if ($pager =~ /^\|/) {
1306 # we cannot warn here: the handle is missing --tchrist
1307 close(OUT) || print SAVEOUT "\nCan't close DB::OUT\n";
1309 # most of the $? crud was coping with broken cshisms
1311 print SAVEOUT "Pager `$pager' failed: ";
1313 print SAVEOUT "shell returned -1\n";
1316 ( $? & 127 ) ? " (SIG#".($?&127).")" : "",
1317 ( $? & 128 ) ? " -- core dumped" : "", "\n";
1319 print SAVEOUT "status ", ($? >> 8), "\n";
1323 open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT");
1324 open(STDOUT,">&SAVEOUT") || &warn("Can't restore STDOUT");
1325 $SIG{PIPE} = "DEFAULT" if $SIG{PIPE} eq \&DB::catch;
1326 # Will stop ignoring SIGPIPE if done like nohup(1)
1327 # does SIGINT but Perl doesn't give us a choice.
1329 open(OUT,">&SAVEOUT") || &warn("Can't restore DB::OUT");
1332 select($selected), $selected= "" unless $selected eq "";
1336 $fall_off_end = 1 unless defined $cmd; # Emulate `q' on EOF
1337 foreach $evalarg (@$post) {
1340 } # if ($single || $signal)
1341 ($@, $!, $^E, $,, $/, $\, $^W) = @saved;
1345 # The following code may be executed now:
1349 my ($al, $ret, @ret) = "";
1350 if (length($sub) > 10 && substr($sub, -10, 10) eq '::AUTOLOAD') {
1353 local $stack_depth = $stack_depth + 1; # Protect from non-local exits
1354 $#stack = $stack_depth;
1355 $stack[-1] = $single;
1357 $single |= 4 if $stack_depth == $deep;
1359 ? ( print_lineinfo(' ' x ($stack_depth - 1), "in "),
1360 # Why -1? But it works! :-(
1361 print_trace($LINEINFO, -1, 1, 1, "$sub$al") )
1362 : print_lineinfo(' ' x ($stack_depth - 1), "entering $sub$al\n")) if $frame;
1365 $single |= $stack[$stack_depth--];
1367 ? ( print_lineinfo(' ' x $stack_depth, "out "),
1368 print_trace($LINEINFO, -1, 1, 1, "$sub$al") )
1369 : print_lineinfo(' ' x $stack_depth, "exited $sub$al\n")) if $frame & 2;
1370 if ($doret eq $stack_depth or $frame & 16) {
1372 my $fh = ($doret eq $stack_depth ? $OUT : $LINEINFO);
1373 print $fh ' ' x $stack_depth if $frame & 16;
1374 print $fh "list context return from $sub:\n";
1375 dumpit($fh, \@ret );
1380 if (defined wantarray) {
1385 $single |= $stack[$stack_depth--];
1387 ? ( print_lineinfo(' ' x $stack_depth, "out "),
1388 print_trace($LINEINFO, -1, 1, 1, "$sub$al") )
1389 : print_lineinfo(' ' x $stack_depth, "exited $sub$al\n")) if $frame & 2;
1390 if ($doret eq $stack_depth or $frame & 16 and defined wantarray) {
1392 my $fh = ($doret eq $stack_depth ? $OUT : $LINEINFO);
1393 print $fh (' ' x $stack_depth) if $frame & 16;
1394 print $fh (defined wantarray
1395 ? "scalar context return from $sub: "
1396 : "void context return from $sub\n");
1397 dumpit( $fh, $ret ) if defined wantarray;
1406 ### Functions with multiple modes of failure die on error, the rest
1407 ### returns FALSE on error.
1408 ### User-interface functions cmd_* output error message.
1410 ### Note all cmd_[a-zA-Z]'s require $line, $dblineno as first arguments
1415 'A' => 'pre580_null',
1417 'B' => 'pre580_null',
1418 'd' => 'pre580_null',
1421 'M' => 'pre580_null',
1423 'o' => 'pre580_null',
1433 my $dblineno = shift;
1435 # with this level of indirection we can wrap
1436 # to old (pre580) or other command sets easily
1439 $set{$CommandSet}{$cmd} || $cmd
1441 # print "rjsf: cmd_wrapper($cmd): $CommandSet($set{$CommandSet}{$cmd}) => call($call)\n";
1443 return &$call($line, $dblineno);
1447 my $line = shift || ''; # [.|line] expr
1448 my $dbline = shift; $line =~ s/^(\.|(?:[^\d]))/$dbline/;
1449 if ($line =~ /^\s*(\d*)\s*(\S.+)/) {
1450 my ($lineno, $expr) = ($1, $2);
1452 if ($dbline[$lineno] == 0) {
1453 print $OUT "Line $lineno($dbline[$lineno]) does not have an action?\n";
1455 $had_breakpoints{$filename} |= 2;
1456 $dbline{$lineno} =~ s/\0[^\0]*//;
1457 $dbline{$lineno} .= "\0" . action($expr);
1461 print $OUT "Adding an action requires an optional lineno and an expression\n"; # hint
1466 my $line = shift || '';
1467 my $dbline = shift; $line =~ s/^\./$dbline/;
1469 eval { &delete_action(); 1 } or print $OUT $@ and return;
1470 } elsif ($line =~ /^(\S.*)/) {
1471 eval { &delete_action($1); 1 } or print $OUT $@ and return;
1473 print $OUT "Deleting an action requires a line number, or '*' for all\n"; # hint
1480 die "Line $i has no action .\n" if $dbline[$i] == 0;
1481 $dbline{$i} =~ s/\0[^\0]*//; # \^a
1482 delete $dbline{$i} if $dbline{$i} eq '';
1484 print $OUT "Deleting all actions...\n";
1485 for my $file (keys %had_breakpoints) {
1486 local *dbline = $main::{'_<' . $file};
1489 for ($i = 1; $i <= $max ; $i++) {
1490 if (defined $dbline{$i}) {
1491 $dbline{$i} =~ s/\0[^\0]*//;
1492 delete $dbline{$i} if $dbline{$i} eq '';
1494 unless ($had_breakpoints{$file} &= ~2) {
1495 delete $had_breakpoints{$file};
1503 my $line = shift; # [.|line] [cond]
1504 my $dbline = shift; $line =~ s/^\./$dbline/;
1505 if ($line =~ /^\s*$/) {
1506 &cmd_b_line($dbline, 1);
1507 } elsif ($line =~ /^load\b\s*(.*)/) {
1508 my $file = $1; $file =~ s/\s+$//;
1510 } elsif ($line =~ /^(postpone|compile)\b\s*([':A-Za-z_][':\w]*)\s*(.*)/) {
1511 my $cond = length $3 ? $3 : '1';
1512 my ($subname, $break) = ($2, $1 eq 'postpone');
1513 $subname =~ s/\'/::/g;
1514 $subname = "${'package'}::" . $subname unless $subname =~ /::/;
1515 $subname = "main".$subname if substr($subname,0,2) eq "::";
1516 $postponed{$subname} = $break ? "break +0 if $cond" : "compile";
1517 } elsif ($line =~ /^([':A-Za-z_][':\w]*(?:\[.*\])?)\s*(.*)/) {
1519 $cond = length $2 ? $2 : '1';
1520 &cmd_b_sub($subname, $cond);
1521 } elsif ($line =~ /^(\d*)\s*(.*)/) {
1522 $line = $1 || $dbline;
1523 $cond = length $2 ? $2 : '1';
1524 &cmd_b_line($line, $cond);
1526 print "confused by line($line)?\n";
1532 $break_on_load{$file} = 1;
1533 $had_breakpoints{$file} |= 1;
1536 sub report_break_on_load {
1537 sort keys %break_on_load;
1545 push @files, $::INC{$file} if $::INC{$file};
1546 $file .= '.pm', redo unless $file =~ /\./;
1548 break_on_load($_) for @files;
1549 @files = report_break_on_load;
1552 print $OUT "Will stop on load of `@files'.\n";
1555 $filename_error = '';
1557 sub breakable_line {
1558 my ($from, $to) = @_;
1561 my $delta = $from < $to ? +1 : -1;
1562 my $limit = $delta > 0 ? $#dbline : 1;
1563 $limit = $to if ($limit - $to) * $delta > 0;
1564 $i += $delta while $dbline[$i] == 0 and ($limit - $i) * $delta > 0;
1566 return $i unless $dbline[$i] == 0;
1567 my ($pl, $upto) = ('', '');
1568 ($pl, $upto) = ('s', "..$to") if @_ >=2 and $from != $to;
1569 die "Line$pl $from$upto$filename_error not breakable\n";
1572 sub breakable_line_in_filename {
1574 local *dbline = $main::{'_<' . $f};
1575 local $filename_error = " of `$f'";
1580 my ($i, $cond) = @_;
1581 $cond = 1 unless @_ >= 2;
1585 die "Line $i$filename_error not breakable.\n" if $dbline[$i] == 0;
1586 $had_breakpoints{$filename} |= 1;
1587 if ($dbline{$i}) { $dbline{$i} =~ s/^[^\0]*/$cond/; }
1588 else { $dbline{$i} = $cond; }
1592 eval { break_on_line(@_); 1 } or do {
1594 print $OUT $@ and return;
1598 sub break_on_filename_line {
1599 my ($f, $i, $cond) = @_;
1600 $cond = 1 unless @_ >= 3;
1601 local *dbline = $main::{'_<' . $f};
1602 local $filename_error = " of `$f'";
1603 local $filename = $f;
1604 break_on_line($i, $cond);
1607 sub break_on_filename_line_range {
1608 my ($f, $from, $to, $cond) = @_;
1609 my $i = breakable_line_in_filename($f, $from, $to);
1610 $cond = 1 unless @_ >= 3;
1611 break_on_filename_line($f,$i,$cond);
1614 sub subroutine_filename_lines {
1615 my ($subname,$cond) = @_;
1616 # Filename below can contain ':'
1617 find_sub($subname) =~ /^(.*):(\d+)-(\d+)$/;
1620 sub break_subroutine {
1621 my $subname = shift;
1622 my ($file,$s,$e) = subroutine_filename_lines($subname) or
1623 die "Subroutine $subname not found.\n";
1624 $cond = 1 unless @_ >= 2;
1625 break_on_filename_line_range($file,$s,$e,@_);
1629 my ($subname,$cond) = @_;
1630 $cond = 1 unless @_ >= 2;
1631 unless (ref $subname eq 'CODE') {
1632 $subname =~ s/\'/::/g;
1634 $subname = "${'package'}::" . $subname
1635 unless $subname =~ /::/;
1636 $subname = "CORE::GLOBAL::$s"
1637 if not defined &$subname and $s !~ /::/ and defined &{"CORE::GLOBAL::$s"};
1638 $subname = "main".$subname if substr($subname,0,2) eq "::";
1640 eval { break_subroutine($subname,$cond); 1 } or do {
1642 print $OUT $@ and return;
1647 my $line = ($_[0] =~ /^\./) ? $dbline : shift || '';
1648 my $dbline = shift; $line =~ s/^\./$dbline/;
1650 eval { &delete_breakpoint(); 1 } or print $OUT $@ and return;
1651 } elsif ($line =~ /^(\S.*)/) {
1652 eval { &delete_breakpoint($line || $dbline); 1 } or do {
1654 print $OUT $@ and return;
1657 print $OUT "Deleting a breakpoint requires a line number, or '*' for all\n"; # hint
1661 sub delete_breakpoint {
1664 die "Line $i not breakable.\n" if $dbline[$i] == 0;
1665 $dbline{$i} =~ s/^[^\0]*//;
1666 delete $dbline{$i} if $dbline{$i} eq '';
1668 print $OUT "Deleting all breakpoints...\n";
1669 for my $file (keys %had_breakpoints) {
1670 local *dbline = $main::{'_<' . $file};
1673 for ($i = 1; $i <= $max ; $i++) {
1674 if (defined $dbline{$i}) {
1675 $dbline{$i} =~ s/^[^\0]+//;
1676 if ($dbline{$i} =~ s/^\0?$//) {
1681 if (not $had_breakpoints{$file} &= ~1) {
1682 delete $had_breakpoints{$file};
1686 undef %postponed_file;
1687 undef %break_on_load;
1691 sub cmd_stop { # As on ^C, but not signal-safy.
1696 my $line = shift || '';
1697 if ($line =~ /^h\s*/) {
1699 } elsif ($line =~ /^(\S.*)$/) {
1700 # support long commands; otherwise bogus errors
1701 # happen when you ask for h on <CR> for example
1702 my $asked = $1; # for proper errmsg
1703 my $qasked = quotemeta($asked); # for searching
1704 # XXX: finds CR but not <CR>
1705 if ($help =~ /^<?(?:[IB]<)$qasked/m) {
1706 while ($help =~ /^(<?(?:[IB]<)$qasked([\s\S]*?)\n)(?!\s)/mg) {
1710 print_help("B<$asked> is not a debugger command.\n");
1713 print_help($summary);
1719 $line =~ s/^-\s*$/-/;
1720 if ($line =~ /^(\$.*)/s) {
1723 print($OUT "Error: $@\n"), next CMD if $@;
1725 print($OUT "Interpreted as: $1 $s\n");
1728 } elsif ($line =~ /^([\':A-Za-z_][\':\w]*(\[.*\])?)/s) {
1729 my $s = $subname = $1;
1730 $subname =~ s/\'/::/;
1731 $subname = $package."::".$subname
1732 unless $subname =~ /::/;
1733 $subname = "CORE::GLOBAL::$s"
1734 if not defined &$subname and $s !~ /::/
1735 and defined &{"CORE::GLOBAL::$s"};
1736 $subname = "main".$subname if substr($subname,0,2) eq "::";
1737 @pieces = split(/:/,find_sub($subname) || $sub{$subname});
1738 $subrange = pop @pieces;
1739 $file = join(':', @pieces);
1740 if ($file ne $filename) {
1741 print $OUT "Switching to file '$file'.\n"
1742 unless $slave_editor;
1743 *dbline = $main::{'_<' . $file};
1748 if (eval($subrange) < -$window) {
1749 $subrange =~ s/-.*/+/;
1754 print $OUT "Subroutine $subname not found.\n";
1756 } elsif ($line =~ /^\s*$/) {
1757 $incr = $window - 1;
1758 $line = $start . '-' . ($start + $incr);
1760 } elsif ($line =~ /^(\d*)\+(\d*)$/) {
1763 $incr = $window - 1 unless $incr;
1764 $line = $start . '-' . ($start + $incr);
1766 } elsif ($line =~ /^((-?[\d\$\.]+)([-,]([\d\$\.]+))?)?/) {
1767 $end = (!defined $2) ? $max : ($4 ? $4 : $2);
1768 $end = $max if $end > $max;
1770 $i = $line if $i eq '.';
1773 if ($slave_editor) {
1774 print $OUT "\032\032$filename:$i:0\n";
1777 for (; $i <= $end; $i++) {
1779 ($stop,$action) = split(/\0/, $dbline{$i}) if
1782 and $filename eq $filename_ini)
1784 : ($dbline[$i]+0 ? ':' : ' ') ;
1785 $arrow .= 'b' if $stop;
1786 $arrow .= 'a' if $action;
1787 print $OUT "$i$arrow\t", $dbline[$i];
1788 $i++, last if $signal;
1790 print $OUT "\n" unless $dbline[$i-1] =~ /\n$/;
1792 $start = $i; # remember in case they want more
1793 $start = $max if $start > $max;
1798 my $arg = shift || 'abw'; $arg = 'abw' unless $CommandSet eq '580'; # sigh...
1799 my $action_wanted = ($arg =~ /a/) ? 1 : 0;
1800 my $break_wanted = ($arg =~ /b/) ? 1 : 0;
1801 my $watch_wanted = ($arg =~ /w/) ? 1 : 0;
1803 if ($break_wanted or $action_wanted) {
1804 for my $file (keys %had_breakpoints) {
1805 local *dbline = $main::{'_<' . $file};
1808 for ($i = 1; $i <= $max; $i++) {
1809 if (defined $dbline{$i}) {
1810 print $OUT "$file:\n" unless $was++;
1811 print $OUT " $i:\t", $dbline[$i];
1812 ($stop,$action) = split(/\0/, $dbline{$i});
1813 print $OUT " break if (", $stop, ")\n"
1814 if $stop and $break_wanted;
1815 print $OUT " action: ", $action, "\n"
1816 if $action and $action_wanted;
1822 if (%postponed and $break_wanted) {
1823 print $OUT "Postponed breakpoints in subroutines:\n";
1825 for $subname (keys %postponed) {
1826 print $OUT " $subname\t$postponed{$subname}\n";
1830 my @have = map { # Combined keys
1831 keys %{$postponed_file{$_}}
1832 } keys %postponed_file;
1833 if (@have and ($break_wanted or $action_wanted)) {
1834 print $OUT "Postponed breakpoints in files:\n";
1836 for $file (keys %postponed_file) {
1837 my $db = $postponed_file{$file};
1838 print $OUT " $file:\n";
1839 for $line (sort {$a <=> $b} keys %$db) {
1840 print $OUT " $line:\n";
1841 my ($stop,$action) = split(/\0/, $$db{$line});
1842 print $OUT " break if (", $stop, ")\n"
1843 if $stop and $break_wanted;
1844 print $OUT " action: ", $action, "\n"
1845 if $action and $action_wanted;
1851 if (%break_on_load and $break_wanted) {
1852 print $OUT "Breakpoints on load:\n";
1854 for $file (keys %break_on_load) {
1855 print $OUT " $file\n";
1859 if ($watch_wanted) {
1861 print $OUT "Watch-expressions:\n" if @to_watch;
1862 for my $expr (@to_watch) {
1863 print $OUT " $expr\n";
1875 my $opt = shift || ''; # opt[=val]
1876 if ($opt =~ /^(\S.*)/) {
1888 if ($line =~ /^(\d*)$/) {
1889 $incr = $window - 1;
1892 $line = $start . '-' . ($start + $incr);
1898 my $expr = shift || '';
1899 if ($expr =~ /^(\S.*)/) {
1900 push @to_watch, $expr;
1903 $val = (defined $val) ? "'$val'" : 'undef' ;
1904 push @old_watch, $val;
1907 print $OUT "Adding a watch-expression requires an expression\n"; # hint
1912 my $expr = shift || '';
1915 print $OUT "Deleting all watch expressions ...\n";
1916 @to_watch = @old_watch = ();
1917 } elsif ($expr =~ /^(\S.*)/) {
1919 foreach (@to_watch) {
1920 my $val = $to_watch[$i_cnt];
1921 if ($val eq $expr) { # =~ m/^\Q$i$/) {
1922 splice(@to_watch, $i_cnt, 1);
1927 print $OUT "Deleting a watch-expression requires an expression, or '*' for all\n"; # hint
1931 ### END of the API section
1934 @saved = ($@, $!, $^E, $,, $/, $\, $^W);
1935 $, = ""; $/ = "\n"; $\ = ""; $^W = 0;
1938 sub print_lineinfo {
1939 resetterm(1) if $LINEINFO eq $OUT and $term_pid != $$;
1945 # The following takes its argument via $evalarg to preserve current @_
1948 my $subname = shift;
1949 if ($postponed{$subname} =~ s/^break\s([+-]?\d+)\s+if\s//) {
1950 my $offset = $1 || 0;
1951 # Filename below can contain ':'
1952 my ($file,$i) = (find_sub($subname) =~ /^(.*):(\d+)-.*$/);
1955 local *dbline = $main::{'_<' . $file};
1956 local $^W = 0; # != 0 is magical below
1957 $had_breakpoints{$file} |= 1;
1959 ++$i until $dbline[$i] != 0 or $i >= $max;
1960 $dbline{$i} = delete $postponed{$subname};
1963 print $OUT "Subroutine $subname not found.\n";
1967 elsif ($postponed{$subname} eq 'compile') { $signal = 1 }
1968 #print $OUT "In postponed_sub for `$subname'.\n";
1972 if ($ImmediateStop) {
1976 return &postponed_sub
1977 unless ref \$_[0] eq 'GLOB'; # A subroutine is compiled.
1978 # Cannot be done before the file is compiled
1979 local *dbline = shift;
1980 my $filename = $dbline;
1981 $filename =~ s/^_<//;
1983 $signal = 1, print $OUT "'$filename' loaded...\n"
1984 if $break_on_load{$filename};
1985 print_lineinfo(' ' x $stack_depth, "Package $filename.\n") if $frame;
1986 return unless $postponed_file{$filename};
1987 $had_breakpoints{$filename} |= 1;
1988 #%dbline = %{$postponed_file{$filename}}; # Cannot be done: unsufficient magic
1990 for $key (keys %{$postponed_file{$filename}}) {
1991 $dbline{$key} = ${$postponed_file{$filename}}{$key};
1993 delete $postponed_file{$filename};
1997 local ($savout) = select(shift);
1998 my $osingle = $single;
1999 my $otrace = $trace;
2000 $single = $trace = 0;
2003 unless (defined &main::dumpValue) {
2006 if (defined &main::dumpValue) {
2011 my $maxdepth = shift || $option{dumpDepth};
2012 $maxdepth = -1 unless defined $maxdepth; # -1 means infinite depth
2013 &main::dumpValue($v, $maxdepth);
2016 print $OUT "dumpvar.pl not available.\n";
2023 # Tied method do not create a context, so may get wrong message:
2028 resetterm(1) if $fh eq $LINEINFO and $LINEINFO eq $OUT and $term_pid != $$;
2029 my @sub = dump_trace($_[0] + 1, $_[1]);
2030 my $short = $_[2]; # Print short report, next one for sub name
2032 for ($i=0; $i <= $#sub; $i++) {
2035 my $args = defined $sub[$i]{args}
2036 ? "(@{ $sub[$i]{args} })"
2038 $args = (substr $args, 0, $maxtrace - 3) . '...'
2039 if length $args > $maxtrace;
2040 my $file = $sub[$i]{file};
2041 $file = $file eq '-e' ? $file : "file `$file'" unless $short;
2043 $s = (substr $s, 0, $maxtrace - 3) . '...' if length $s > $maxtrace;
2045 my $sub = @_ >= 4 ? $_[3] : $s;
2046 print $fh "$sub[$i]{context}=$sub$args from $file:$sub[$i]{line}\n";
2048 print $fh "$sub[$i]{context} = $s$args" .
2049 " called from $file" .
2050 " line $sub[$i]{line}\n";
2057 my $count = shift || 1e9;
2060 my ($p,$file,$line,$sub,$h,$args,$e,$r,@a,@sub,$context);
2061 my $nothard = not $frame & 8;
2062 local $frame = 0; # Do not want to trace this.
2063 my $otrace = $trace;
2066 $i < $count and ($p,$file,$line,$sub,$h,$context,$e,$r) = caller($i);
2071 if (not defined $arg) {
2073 } elsif ($nothard and tied $arg) {
2075 } elsif ($nothard and $type = ref $arg) {
2076 push @a, "ref($type)";
2078 local $_ = "$arg"; # Safe to stringify now - should not call f().
2081 unless /^(?: -?[\d.]+ | \*[\w:]* )$/x;
2082 s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg;
2083 s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg;
2087 $context = $context ? '@' : (defined $context ? "\$" : '.');
2088 $args = $h ? [@a] : undef;
2089 $e =~ s/\n\s*\;\s*\Z// if $e;
2090 $e =~ s/([\\\'])/\\$1/g if $e;
2092 $sub = "require '$e'";
2093 } elsif (defined $r) {
2095 } elsif ($sub eq '(eval)') {
2096 $sub = "eval {...}";
2098 push(@sub, {context => $context, sub => $sub, args => $args,
2099 file => $file, line => $line});
2108 while ($action =~ s/\\$//) {
2117 # i hate using globals!
2118 $balanced_brace_re ||= qr{
2121 (?> [^{}] + ) # Non-parens without backtracking
2123 (??{ $balanced_brace_re }) # Group with matching parens
2127 return $_[0] !~ m/$balanced_brace_re/;
2131 &readline("cont: ");
2135 # We save, change, then restore STDIN and STDOUT to avoid fork() since
2136 # some non-Unix systems can do system() but have problems with fork().
2137 open(SAVEIN,"<&STDIN") || &warn("Can't save STDIN");
2138 open(SAVEOUT,">&STDOUT") || &warn("Can't save STDOUT");
2139 open(STDIN,"<&IN") || &warn("Can't redirect STDIN");
2140 open(STDOUT,">&OUT") || &warn("Can't redirect STDOUT");
2142 # XXX: using csh or tcsh destroys sigint retvals!
2144 open(STDIN,"<&SAVEIN") || &warn("Can't restore STDIN");
2145 open(STDOUT,">&SAVEOUT") || &warn("Can't restore STDOUT");
2150 # most of the $? crud was coping with broken cshisms
2152 &warn("(Command exited ", ($? >> 8), ")\n");
2154 &warn( "(Command died of SIG#", ($? & 127),
2155 (($? & 128) ? " -- core dumped" : "") , ")", "\n");
2165 eval { require Term::ReadLine } or die $@;
2168 my ($i, $o) = split $tty, /,/;
2169 $o = $i unless defined $o;
2170 open(IN,"<$i") or die "Cannot open TTY `$i' for read: $!";
2171 open(OUT,">$o") or die "Cannot open TTY `$o' for write: $!";
2174 my $sel = select($OUT);
2178 eval "require Term::Rendezvous;" or die;
2179 my $rv = $ENV{PERLDB_NOTTY} || "/tmp/perldbtty$$";
2180 my $term_rv = new Term::Rendezvous $rv;
2182 $OUT = $term_rv->OUT;
2185 if ($term_pid eq '-1') { # In a TTY with another debugger
2189 $term = new Term::ReadLine::Stub 'perldb', $IN, $OUT;
2191 $term = new Term::ReadLine 'perldb', $IN, $OUT;
2193 $rl_attribs = $term->Attribs;
2194 $rl_attribs->{basic_word_break_characters} .= '-:+/*,[])}'
2195 if defined $rl_attribs->{basic_word_break_characters}
2196 and index($rl_attribs->{basic_word_break_characters}, ":") == -1;
2197 $rl_attribs->{special_prefixes} = '$@&%';
2198 $rl_attribs->{completer_word_break_characters} .= '$@&%';
2199 $rl_attribs->{completion_function} = \&db_complete;
2201 $LINEINFO = $OUT unless defined $LINEINFO;
2202 $lineinfo = $console unless defined $lineinfo;
2204 if ($term->Features->{setHistory} and "@hist" ne "?") {
2205 $term->SetHistory(@hist);
2207 ornaments($ornaments) if defined $ornaments;
2211 # Example get_fork_TTY functions
2212 sub xterm_get_fork_TTY {
2213 (my $name = $0) =~ s,^.*[/\\],,s;
2214 open XT, qq[3>&1 xterm -title "Daughter Perl debugger $pids $name" -e sh -c 'tty 1>&3;\
2218 $pidprompt = ''; # Shown anyway in titlebar
2222 # This example function resets $IN, $OUT itself
2223 sub os2_get_fork_TTY {
2224 local $^F = 40; # XXXX Fixme!
2226 my ($in1, $out1, $in2, $out2);
2227 # Having -d in PERL5OPT would lead to a disaster...
2228 local $ENV{PERL5OPT} = $ENV{PERL5OPT} if $ENV{PERL5OPT};
2229 $ENV{PERL5OPT} =~ s/(?:^|(?<=\s))-d\b// if $ENV{PERL5OPT};
2230 $ENV{PERL5OPT} =~ s/(?:^|(?<=\s))-d\B/-/ if $ENV{PERL5OPT};
2231 print $OUT "Making kid PERL5OPT->`$ENV{PERL5OPT}'.\n" if $ENV{PERL5OPT};
2232 (my $name = $0) =~ s,^.*[/\\],,s;
2234 if ( pipe $in1, $out1 and pipe $in2, $out2
2235 # system P_SESSION will fail if there is another process
2236 # in the same session with a "dependent" asynchronous child session.
2237 and @args = ($rl, fileno $in1, fileno $out2,
2238 "Daughter Perl debugger $pids $name") and
2239 (($kpid = CORE::system 4, $^X, '-we', <<'ES', @args) >= 0 # P_SESSION
2242 my ($rl, $in) = (shift, shift); # Read from $in and pass through
2244 system P_NOWAIT, $^X, '-we', <<EOS or die "Cannot start a grandkid";
2245 open IN, '<&=$in' or die "open <&=$in: \$!";
2246 \$| = 1; print while sysread IN, \$_, 1<<16;
2250 open OUT, ">&=$out" or die "Cannot open &=$out for writing: $!";
2252 require Term::ReadKey if $rl;
2253 Term::ReadKey::ReadMode(4) if $rl; # Nodelay on kbd. Pipe is automatically nodelay...
2254 print while sysread STDIN, $_, 1<<($rl ? 16 : 0);
2256 or warn "system P_SESSION: $!, $^E" and 0)
2257 and close $in1 and close $out2 ) {
2258 $pidprompt = ''; # Shown anyway in titlebar
2259 reset_IN_OUT($in2, $out1);
2261 return ''; # Indicate that reset_IN_OUT is called
2266 sub create_IN_OUT { # Create a window with IN/OUT handles redirected there
2267 my $in = &get_fork_TTY if defined &get_fork_TTY;
2268 $in = $fork_TTY if defined $fork_TTY; # Backward compatibility
2269 if (not defined $in) {
2271 print_help(<<EOP) if $why == 1;
2272 I<#########> Forked, but do not know how to create a new B<TTY>. I<#########>
2274 print_help(<<EOP) if $why == 2;
2275 I<#########> Daughter session, do not know how to change a B<TTY>. I<#########>
2276 This may be an asynchronous session, so the parent debugger may be active.
2278 print_help(<<EOP) if $why != 4;
2279 Since two debuggers fight for the same TTY, input is severely entangled.
2283 I know how to switch the output to a different window in xterms
2284 and OS/2 consoles only. For a manual switch, put the name of the created I<TTY>
2285 in B<\$DB::fork_TTY>, or define a function B<DB::get_fork_TTY()> returning this.
2287 On I<UNIX>-like systems one can get the name of a I<TTY> for the given window
2288 by typing B<tty>, and disconnect the I<shell> from I<TTY> by B<sleep 1000000>.
2291 } elsif ($in ne '') {
2294 $console = ''; # Indicate no need to open-from-the-console
2299 sub resetterm { # We forked, so we need a different TTY
2301 my $systemed = $in > 1 ? '-' : '';
2303 $pids =~ s/\]/$systemed->$$]/;
2305 $pids = "[$term_pid->$$]";
2309 return unless $CreateTTY & $in;
2316 my $left = @typeahead;
2317 my $got = shift @typeahead;
2319 print $OUT "auto(-$left)", shift, $got, "\n";
2320 $term->AddHistory($got)
2321 if length($got) > 1 and defined $term->Features->{addHistory};
2327 my $line = CORE::readline($cmdfhs[-1]);
2328 defined $line ? (print $OUT ">> $line" and return $line)
2329 : close pop @cmdfhs;
2331 if (ref $OUT and UNIVERSAL::isa($OUT, 'IO::Socket::INET')) {
2332 $OUT->write(join('', @_));
2334 $IN->recv( $stuff, 2048 ); # XXX: what's wrong with sysread?
2338 $term->readline(@_);
2343 my ($opt, $val)= @_;
2344 $val = option_val($opt,'N/A');
2345 $val =~ s/([\\\'])/\\$1/g;
2346 printf $OUT "%20s = '%s'\n", $opt, $val;
2350 my ($opt, $default)= @_;
2352 if (defined $optionVars{$opt}
2353 and defined ${$optionVars{$opt}}) {
2354 $val = ${$optionVars{$opt}};
2355 } elsif (defined $optionAction{$opt}
2356 and defined &{$optionAction{$opt}}) {
2357 $val = &{$optionAction{$opt}}();
2358 } elsif (defined $optionAction{$opt}
2359 and not defined $option{$opt}
2360 or defined $optionVars{$opt}
2361 and not defined ${$optionVars{$opt}}) {
2364 $val = $option{$opt};
2366 $val = $default unless defined $val;
2373 # too dangerous to let intuitive usage overwrite important things
2374 # defaultion should never be the default
2375 my %opt_needs_val = map { ( $_ => 1 ) } qw{
2376 dumpDepth arrayDepth hashDepth LineInfo maxTraceLen ornaments windowSize
2377 pager quote ReadLine recallCommand RemotePort ShellBang TTY
2382 s/^(\w+)(\W?)// or print($OUT "Invalid option `$_'\n"), last;
2383 my ($opt,$sep) = ($1,$2);
2386 print($OUT "Option query `$opt?' followed by non-space `$_'\n"), last
2388 #&dump_option($opt);
2389 } elsif ($sep !~ /\S/) {
2391 $val = "1"; # this is an evil default; make 'em set it!
2392 } elsif ($sep eq "=") {
2393 if (s/ (["']) ( (?: \\. | (?! \1 ) [^\\] )* ) \1 //x) {
2395 ($val = $2) =~ s/\\([$quote\\])/$1/g;
2399 print OUT qq(Option better cleared using $opt=""\n)
2403 } else { #{ to "let some poor schmuck bounce on the % key in B<vi>."
2404 my ($end) = "\\" . substr( ")]>}$sep", index("([<{",$sep), 1 ); #}
2405 s/^(([^\\$end]|\\[\\$end])*)$end($|\s+)// or
2406 print($OUT "Unclosed option value `$opt$sep$_'\n"), last;
2407 ($val = $1) =~ s/\\([\\$end])/$1/g;
2411 my $matches = grep( /^\Q$opt/ && ($option = $_), @options )
2412 || grep( /^\Q$opt/i && ($option = $_), @options );
2414 print($OUT "Unknown option `$opt'\n"), next unless $matches;
2415 print($OUT "Ambiguous option `$opt'\n"), next if $matches > 1;
2417 if ($opt_needs_val{$option} && $val_defaulted) {
2418 my $cmd = ($CommandSet eq '580') ? 'o' : 'O';
2419 print $OUT "Option `$opt' is non-boolean. Use `$cmd $option=VAL' to set, `$cmd $option?' to query\n";
2423 $option{$option} = $val if defined $val;
2428 require '$optionRequire{$option}';
2430 } || die # XXX: shouldn't happen
2431 if defined $optionRequire{$option} &&
2434 ${$optionVars{$option}} = $val
2435 if defined $optionVars{$option} &&
2438 &{$optionAction{$option}} ($val)
2439 if defined $optionAction{$option} &&
2440 defined &{$optionAction{$option}} &&
2444 dump_option($option) unless $OUT eq \*STDERR;
2449 my ($stem,@list) = @_;
2451 $ENV{"${stem}_n"} = @list;
2452 for $i (0 .. $#list) {
2454 $val =~ s/\\/\\\\/g;
2455 $val =~ s/([\0-\37\177\200-\377])/"\\0x" . unpack('H2',$1)/eg;
2456 $ENV{"${stem}_$i"} = $val;
2463 my $n = delete $ENV{"${stem}_n"};
2465 for $i (0 .. $n - 1) {
2466 $val = delete $ENV{"${stem}_$i"};
2467 $val =~ s/\\((\\)|0x(..))/ $2 ? $2 : pack('H2', $3) /ge;
2475 return; # Put nothing on the stack - malloc/free land!
2479 my($msg)= join("",@_);
2480 $msg .= ": $!\n" unless $msg =~ /\n$/;
2486 my $switch_li = $LINEINFO eq $OUT;
2487 if ($term and $term->Features->{newTTY}) {
2488 ($IN, $OUT) = (shift, shift);
2489 $term->newTTY($IN, $OUT);
2491 &warn("Too late to set IN/OUT filehandles, enabled on next `R'!\n");
2493 ($IN, $OUT) = (shift, shift);
2495 my $o = select $OUT;
2498 $LINEINFO = $OUT if $switch_li;
2502 if (@_ and $term and $term->Features->{newTTY}) {
2503 my ($in, $out) = shift;
2505 ($in, $out) = split /,/, $in, 2;
2509 open IN, $in or die "cannot open `$in' for read: $!";
2510 open OUT, ">$out" or die "cannot open `$out' for write: $!";
2511 reset_IN_OUT(\*IN,\*OUT);
2514 &warn("Too late to set TTY, enabled on next `R'!\n") if $term and @_;
2515 # Useful if done through PERLDB_OPTS:
2516 $console = $tty = shift if @_;
2522 &warn("Too late to set noTTY, enabled on next `R'!\n") if @_;
2524 $notty = shift if @_;
2530 &warn("Too late to set ReadLine, enabled on next `R'!\n") if @_;
2538 &warn("Too late to set RemotePort, enabled on next 'R'!\n") if @_;
2540 $remoteport = shift if @_;
2545 if (${$term->Features}{tkRunning}) {
2546 return $term->tkRunning(@_);
2549 print $OUT "tkRunning not supported by current ReadLine package.\n";
2556 &warn("Too late to set up NonStop mode, enabled on next `R'!\n") if @_;
2558 $runnonstop = shift if @_;
2565 $pager="|".$pager unless $pager =~ /^(\+?\>|\|)/;
2572 $sh = quotemeta shift;
2573 $sh .= "\\b" if $sh =~ /\w$/;
2577 $psh =~ s/\\(.)/$1/g;
2582 if (defined $term) {
2583 local ($warnLevel,$dieLevel) = (0, 1);
2584 return '' unless $term->Features->{ornaments};
2585 eval { $term->ornaments(@_) } || '';
2593 $rc = quotemeta shift;
2594 $rc .= "\\b" if $rc =~ /\w$/;
2598 $prc =~ s/\\(.)/$1/g;
2603 return $lineinfo unless @_;
2605 my $stream = ($lineinfo =~ /^(\+?\>|\|)/) ? $lineinfo : ">$lineinfo";
2606 $slave_editor = ($stream =~ /^\|/);
2607 open(LINEINFO, "$stream") || &warn("Cannot open `$stream' for write");
2608 $LINEINFO = \*LINEINFO;
2609 my $save = select($LINEINFO);
2615 sub list_modules { # versions
2623 s/^Term::ReadLine::readline$/readline/;
2624 if (defined ${ $_ . '::VERSION' }) {
2625 $version{$file} = "${ $_ . '::VERSION' } from ";
2627 $version{$file} .= $INC{$file};
2629 dumpit($OUT,\%version);
2633 # XXX: make sure there are tabs between the command and explanation,
2634 # or print_help will screw up your formatting if you have
2635 # eeevil ornaments enabled. This is an insane mess.
2638 Help is currently only available for the new 580 CommandSet,
2639 if you really want old behaviour, presumably you know what
2643 B<s> [I<expr>] Single step [in I<expr>].
2644 B<n> [I<expr>] Next, steps over subroutine calls [in I<expr>].
2645 <B<CR>> Repeat last B<n> or B<s> command.
2646 B<r> Return from current subroutine.
2647 B<c> [I<line>|I<sub>] Continue; optionally inserts a one-time-only breakpoint
2648 at the specified position.
2649 B<l> I<min>B<+>I<incr> List I<incr>+1 lines starting at I<min>.
2650 B<l> I<min>B<->I<max> List lines I<min> through I<max>.
2651 B<l> I<line> List single I<line>.
2652 B<l> I<subname> List first window of lines from subroutine.
2653 B<l> I<\$var> List first window of lines from subroutine referenced by I<\$var>.
2654 B<l> List next window of lines.
2655 B<-> List previous window of lines.
2656 B<v> [I<line>] View window around I<line>.
2657 B<.> Return to the executed line.
2658 B<f> I<filename> Switch to viewing I<filename>. File must be already loaded.
2659 I<filename> may be either the full name of the file, or a regular
2660 expression matching the full file name:
2661 B<f> I</home/me/foo.pl> and B<f> I<oo\\.> may access the same file.
2662 Evals (with saved bodies) are considered to be filenames:
2663 B<f> I<(eval 7)> and B<f> I<eval 7\\b> access the body of the 7th eval
2664 (in the order of execution).
2665 B</>I<pattern>B</> Search forwards for I<pattern>; final B</> is optional.
2666 B<?>I<pattern>B<?> Search backwards for I<pattern>; final B<?> is optional.
2667 B<L> [I<a|b|w>] List actions and or breakpoints and or watch-expressions.
2668 B<S> [[B<!>]I<pattern>] List subroutine names [not] matching I<pattern>.
2669 B<t> Toggle trace mode.
2670 B<t> I<expr> Trace through execution of I<expr>.
2671 B<b> Sets breakpoint on current line)
2672 B<b> [I<line>] [I<condition>]
2673 Set breakpoint; I<line> defaults to the current execution line;
2674 I<condition> breaks if it evaluates to true, defaults to '1'.
2675 B<b> I<subname> [I<condition>]
2676 Set breakpoint at first line of subroutine.
2677 B<b> I<\$var> Set breakpoint at first line of subroutine referenced by I<\$var>.
2678 B<b> B<load> I<filename> Set breakpoint on 'require'ing the given file.
2679 B<b> B<postpone> I<subname> [I<condition>]
2680 Set breakpoint at first line of subroutine after
2682 B<b> B<compile> I<subname>
2683 Stop after the subroutine is compiled.
2684 B<B> [I<line>] Delete the breakpoint for I<line>.
2685 B<B> I<*> Delete all breakpoints.
2686 B<a> [I<line>] I<command>
2687 Set an action to be done before the I<line> is executed;
2688 I<line> defaults to the current execution line.
2689 Sequence is: check for breakpoint/watchpoint, print line
2690 if necessary, do action, prompt user if necessary,
2693 B<A> [I<line>] Delete the action for I<line>.
2694 B<A> I<*> Delete all actions.
2695 B<w> I<expr> Add a global watch-expression.
2697 B<W> I<expr> Delete a global watch-expression.
2698 B<W> I<*> Delete all watch-expressions.
2699 B<V> [I<pkg> [I<vars>]] List some (default all) variables in package (default current).
2700 Use B<~>I<pattern> and B<!>I<pattern> for positive and negative regexps.
2701 B<X> [I<vars>] Same as \"B<V> I<currentpackage> [I<vars>]\".
2702 B<x> I<expr> Evals expression in list context, dumps the result.
2703 B<m> I<expr> Evals expression in list context, prints methods callable
2704 on the first element of the result.
2705 B<m> I<class> Prints methods callable via the given class.
2706 B<M> Show versions of loaded modules.
2708 B<<> ? List Perl commands to run before each prompt.
2709 B<<> I<expr> Define Perl command to run before each prompt.
2710 B<<<> I<expr> Add to the list of Perl commands to run before each prompt.
2711 B<>> ? List Perl commands to run after each prompt.
2712 B<>> I<expr> Define Perl command to run after each prompt.
2713 B<>>B<>> I<expr> Add to the list of Perl commands to run after each prompt.
2714 B<{> I<db_command> Define debugger command to run before each prompt.
2715 B<{> ? List debugger commands to run before each prompt.
2716 B<{{> I<db_command> Add to the list of debugger commands to run before each prompt.
2717 B<$prc> I<number> Redo a previous command (default previous command).
2718 B<$prc> I<-number> Redo number'th-to-last command.
2719 B<$prc> I<pattern> Redo last command that started with I<pattern>.
2720 See 'B<O> I<recallCommand>' too.
2721 B<$psh$psh> I<cmd> Run cmd in a subprocess (reads from DB::IN, writes to DB::OUT)"
2722 . ( $rc eq $sh ? "" : "
2723 B<$psh> [I<cmd>] Run I<cmd> in subshell (forces \"\$SHELL -c 'cmd'\")." ) . "
2724 See 'B<O> I<shellBang>' too.
2725 B<@>I<file> Execute I<file> containing debugger commands (may nest).
2726 B<H> I<-number> Display last number commands (default all).
2727 B<p> I<expr> Same as \"I<print {DB::OUT} expr>\" in current package.
2728 B<|>I<dbcmd> Run debugger command, piping DB::OUT to current pager.
2729 B<||>I<dbcmd> Same as B<|>I<dbcmd> but DB::OUT is temporarilly select()ed as well.
2730 B<\=> [I<alias> I<value>] Define a command alias, or list current aliases.
2731 I<command> Execute as a perl statement in current package.
2732 B<R> Pure-man-restart of debugger, some of debugger state
2733 and command-line options may be lost.
2734 Currently the following settings are preserved:
2735 history, breakpoints and actions, debugger B<O>ptions
2736 and the following command-line options: I<-w>, I<-I>, I<-e>.
2738 B<o> [I<opt>] ... Set boolean option to true
2739 B<o> [I<opt>B<?>] Query options
2740 B<o> [I<opt>B<=>I<val>] [I<opt>=B<\">I<val>B<\">] ...
2741 Set options. Use quotes in spaces in value.
2742 I<recallCommand>, I<ShellBang> chars used to recall command or spawn shell;
2743 I<pager> program for output of \"|cmd\";
2744 I<tkRunning> run Tk while prompting (with ReadLine);
2745 I<signalLevel> I<warnLevel> I<dieLevel> level of verbosity;
2746 I<inhibit_exit> Allows stepping off the end of the script.
2747 I<ImmediateStop> Debugger should stop as early as possible.
2748 I<RemotePort> Remote hostname:port for remote debugging
2749 The following options affect what happens with B<V>, B<X>, and B<x> commands:
2750 I<arrayDepth>, I<hashDepth> print only first N elements ('' for all);
2751 I<compactDump>, I<veryCompact> change style of array and hash dump;
2752 I<globPrint> whether to print contents of globs;
2753 I<DumpDBFiles> dump arrays holding debugged files;
2754 I<DumpPackages> dump symbol tables of packages;
2755 I<DumpReused> dump contents of \"reused\" addresses;
2756 I<quote>, I<HighBit>, I<undefPrint> change style of string dump;
2757 I<bareStringify> Do not print the overload-stringified value;
2758 Other options include:
2759 I<PrintRet> affects printing of return value after B<r> command,
2760 I<frame> affects printing messages on subroutine entry/exit.
2761 I<AutoTrace> affects printing messages on possible breaking points.
2762 I<maxTraceLen> gives max length of evals/args listed in stack trace.
2763 I<ornaments> affects screen appearance of the command line.
2764 I<CreateTTY> bits control attempts to create a new TTY on events:
2765 1: on fork() 2: debugger is started inside debugger
2767 During startup options are initialized from \$ENV{PERLDB_OPTS}.
2768 You can put additional initialization options I<TTY>, I<noTTY>,
2769 I<ReadLine>, I<NonStop>, and I<RemotePort> there (or use
2770 `B<R>' after you set them).
2772 B<q> or B<^D> Quit. Set B<\$DB::finished = 0> to debug global destruction.
2773 B<h> Summary of debugger commands.
2774 B<h> [I<db_command>] Get help [on a specific debugger command], enter B<|h> to page.
2775 B<h h> Long help for debugger commands
2776 B<$doccmd> I<manpage> Runs the external doc viewer B<$doccmd> command on the
2777 named Perl I<manpage>, or on B<$doccmd> itself if omitted.
2778 Set B<\$DB::doccmd> to change viewer.
2780 Type `|h h' for a paged display if this was too hard to read.
2782 "; # Fix balance of vi % matching: }}}}
2784 # note: tabs in the following section are not-so-helpful
2785 $summary = <<"END_SUM";
2786 I<List/search source lines:> I<Control script execution:>
2787 B<l> [I<ln>|I<sub>] List source code B<T> Stack trace
2788 B<-> or B<.> List previous/current line B<s> [I<expr>] Single step [in expr]
2789 B<v> [I<line>] View around line B<n> [I<expr>] Next, steps over subs
2790 B<f> I<filename> View source in file <B<CR>/B<Enter>> Repeat last B<n> or B<s>
2791 B</>I<pattern>B</> B<?>I<patt>B<?> Search forw/backw B<r> Return from subroutine
2792 B<M> Show module versions B<c> [I<ln>|I<sub>] Continue until position
2793 I<Debugger controls:> B<L> List break/watch/actions
2794 B<o> [...] Set debugger options B<t> [I<expr>] Toggle trace [trace expr]
2795 B<<>[B<<>]|B<{>[B<{>]|B<>>[B<>>] [I<cmd>] Do pre/post-prompt B<b> [I<ln>|I<event>|I<sub>] [I<cnd>] Set breakpoint
2796 B<$prc> [I<N>|I<pat>] Redo a previous command B<B> I<ln|*> Delete a/all breakpoints
2797 B<H> [I<-num>] Display last num commands B<a> [I<ln>] I<cmd> Do cmd before line
2798 B<=> [I<a> I<val>] Define/list an alias B<A> I<ln|*> Delete a/all actions
2799 B<h> [I<db_cmd>] Get help on command B<w> I<expr> Add a watch expression
2800 B<h h> Complete help page B<W> I<expr|*> Delete a/all watch expressions
2801 B<|>[B<|>]I<db_cmd> Send output to pager B<$psh>\[B<$psh>\] I<syscmd> Run cmd in a subprocess
2802 B<q> or B<^D> Quit B<R> Attempt a restart
2803 I<Data Examination:> B<expr> Execute perl code, also see: B<s>,B<n>,B<t> I<expr>
2804 B<x>|B<m> I<expr> Evals expr in list context, dumps the result or lists methods.
2805 B<p> I<expr> Print expression (uses script's current package).
2806 B<S> [[B<!>]I<pat>] List subroutine names [not] matching pattern
2807 B<V> [I<Pk> [I<Vars>]] List Variables in Package. Vars can be ~pattern or !pattern.
2808 B<X> [I<Vars>] Same as \"B<V> I<current_package> [I<Vars>]\".
2809 For more help, type B<h> I<cmd_letter>, or run B<$doccmd perldebug> for all docs.
2811 # ')}}; # Fix balance of vi % matching
2813 # and this is really numb...
2816 B<s> [I<expr>] Single step [in I<expr>].
2817 B<n> [I<expr>] Next, steps over subroutine calls [in I<expr>].
2818 <B<CR>> Repeat last B<n> or B<s> command.
2819 B<r> Return from current subroutine.
2820 B<c> [I<line>|I<sub>] Continue; optionally inserts a one-time-only breakpoint
2821 at the specified position.
2822 B<l> I<min>B<+>I<incr> List I<incr>+1 lines starting at I<min>.
2823 B<l> I<min>B<->I<max> List lines I<min> through I<max>.
2824 B<l> I<line> List single I<line>.
2825 B<l> I<subname> List first window of lines from subroutine.
2826 B<l> I<\$var> List first window of lines from subroutine referenced by I<\$var>.
2827 B<l> List next window of lines.
2828 B<-> List previous window of lines.
2829 B<w> [I<line>] List window around I<line>.
2830 B<.> Return to the executed line.
2831 B<f> I<filename> Switch to viewing I<filename>. File must be already loaded.
2832 I<filename> may be either the full name of the file, or a regular
2833 expression matching the full file name:
2834 B<f> I</home/me/foo.pl> and B<f> I<oo\\.> may access the same file.
2835 Evals (with saved bodies) are considered to be filenames:
2836 B<f> I<(eval 7)> and B<f> I<eval 7\\b> access the body of the 7th eval
2837 (in the order of execution).
2838 B</>I<pattern>B</> Search forwards for I<pattern>; final B</> is optional.
2839 B<?>I<pattern>B<?> Search backwards for I<pattern>; final B<?> is optional.
2840 B<L> List all breakpoints and actions.
2841 B<S> [[B<!>]I<pattern>] List subroutine names [not] matching I<pattern>.
2842 B<t> Toggle trace mode.
2843 B<t> I<expr> Trace through execution of I<expr>.
2844 B<b> [I<line>] [I<condition>]
2845 Set breakpoint; I<line> defaults to the current execution line;
2846 I<condition> breaks if it evaluates to true, defaults to '1'.
2847 B<b> I<subname> [I<condition>]
2848 Set breakpoint at first line of subroutine.
2849 B<b> I<\$var> Set breakpoint at first line of subroutine referenced by I<\$var>.
2850 B<b> B<load> I<filename> Set breakpoint on `require'ing the given file.
2851 B<b> B<postpone> I<subname> [I<condition>]
2852 Set breakpoint at first line of subroutine after
2854 B<b> B<compile> I<subname>
2855 Stop after the subroutine is compiled.
2856 B<d> [I<line>] Delete the breakpoint for I<line>.
2857 B<D> Delete all breakpoints.
2858 B<a> [I<line>] I<command>
2859 Set an action to be done before the I<line> is executed;
2860 I<line> defaults to the current execution line.
2861 Sequence is: check for breakpoint/watchpoint, print line
2862 if necessary, do action, prompt user if necessary,
2864 B<a> [I<line>] Delete the action for I<line>.
2865 B<A> Delete all actions.
2866 B<W> I<expr> Add a global watch-expression.
2867 B<W> Delete all watch-expressions.
2868 B<V> [I<pkg> [I<vars>]] List some (default all) variables in package (default current).
2869 Use B<~>I<pattern> and B<!>I<pattern> for positive and negative regexps.
2870 B<X> [I<vars>] Same as \"B<V> I<currentpackage> [I<vars>]\".
2871 B<x> I<expr> Evals expression in list context, dumps the result.
2872 B<m> I<expr> Evals expression in list context, prints methods callable
2873 on the first element of the result.
2874 B<m> I<class> Prints methods callable via the given class.
2876 B<<> ? List Perl commands to run before each prompt.
2877 B<<> I<expr> Define Perl command to run before each prompt.
2878 B<<<> I<expr> Add to the list of Perl commands to run before each prompt.
2879 B<>> ? List Perl commands to run after each prompt.
2880 B<>> I<expr> Define Perl command to run after each prompt.
2881 B<>>B<>> I<expr> Add to the list of Perl commands to run after each prompt.
2882 B<{> I<db_command> Define debugger command to run before each prompt.
2883 B<{> ? List debugger commands to run before each prompt.
2884 B<{{> I<db_command> Add to the list of debugger commands to run before each prompt.
2885 B<$prc> I<number> Redo a previous command (default previous command).
2886 B<$prc> I<-number> Redo number'th-to-last command.
2887 B<$prc> I<pattern> Redo last command that started with I<pattern>.
2888 See 'B<O> I<recallCommand>' too.
2889 B<$psh$psh> I<cmd> Run cmd in a subprocess (reads from DB::IN, writes to DB::OUT)"
2890 . ( $rc eq $sh ? "" : "
2891 B<$psh> [I<cmd>] Run I<cmd> in subshell (forces \"\$SHELL -c 'cmd'\")." ) . "
2892 See 'B<O> I<shellBang>' too.
2893 B<@>I<file> Execute I<file> containing debugger commands (may nest).
2894 B<H> I<-number> Display last number commands (default all).
2895 B<p> I<expr> Same as \"I<print {DB::OUT} expr>\" in current package.
2896 B<|>I<dbcmd> Run debugger command, piping DB::OUT to current pager.
2897 B<||>I<dbcmd> Same as B<|>I<dbcmd> but DB::OUT is temporarilly select()ed as well.
2898 B<\=> [I<alias> I<value>] Define a command alias, or list current aliases.
2899 I<command> Execute as a perl statement in current package.
2900 B<v> Show versions of loaded modules.
2901 B<R> Pure-man-restart of debugger, some of debugger state
2902 and command-line options may be lost.
2903 Currently the following settings are preserved:
2904 history, breakpoints and actions, debugger B<O>ptions
2905 and the following command-line options: I<-w>, I<-I>, I<-e>.
2907 B<O> [I<opt>] ... Set boolean option to true
2908 B<O> [I<opt>B<?>] Query options
2909 B<O> [I<opt>B<=>I<val>] [I<opt>=B<\">I<val>B<\">] ...
2910 Set options. Use quotes in spaces in value.
2911 I<recallCommand>, I<ShellBang> chars used to recall command or spawn shell;
2912 I<pager> program for output of \"|cmd\";
2913 I<tkRunning> run Tk while prompting (with ReadLine);
2914 I<signalLevel> I<warnLevel> I<dieLevel> level of verbosity;
2915 I<inhibit_exit> Allows stepping off the end of the script.
2916 I<ImmediateStop> Debugger should stop as early as possible.
2917 I<RemotePort> Remote hostname:port for remote debugging
2918 The following options affect what happens with B<V>, B<X>, and B<x> commands:
2919 I<arrayDepth>, I<hashDepth> print only first N elements ('' for all);
2920 I<compactDump>, I<veryCompact> change style of array and hash dump;
2921 I<globPrint> whether to print contents of globs;
2922 I<DumpDBFiles> dump arrays holding debugged files;
2923 I<DumpPackages> dump symbol tables of packages;
2924 I<DumpReused> dump contents of \"reused\" addresses;
2925 I<quote>, I<HighBit>, I<undefPrint> change style of string dump;
2926 I<bareStringify> Do not print the overload-stringified value;
2927 Other options include:
2928 I<PrintRet> affects printing of return value after B<r> command,
2929 I<frame> affects printing messages on subroutine entry/exit.
2930 I<AutoTrace> affects printing messages on possible breaking points.
2931 I<maxTraceLen> gives max length of evals/args listed in stack trace.
2932 I<ornaments> affects screen appearance of the command line.
2933 I<CreateTTY> bits control attempts to create a new TTY on events:
2934 1: on fork() 2: debugger is started inside debugger
2936 During startup options are initialized from \$ENV{PERLDB_OPTS}.
2937 You can put additional initialization options I<TTY>, I<noTTY>,
2938 I<ReadLine>, I<NonStop>, and I<RemotePort> there (or use
2939 `B<R>' after you set them).
2941 B<q> or B<^D> Quit. Set B<\$DB::finished = 0> to debug global destruction.
2942 B<h> [I<db_command>] Get help [on a specific debugger command], enter B<|h> to page.
2943 B<h h> Summary of debugger commands.
2944 B<$doccmd> I<manpage> Runs the external doc viewer B<$doccmd> command on the
2945 named Perl I<manpage>, or on B<$doccmd> itself if omitted.
2946 Set B<\$DB::doccmd> to change viewer.
2948 Type `|h' for a paged display if this was too hard to read.
2950 "; # Fix balance of vi % matching: }}}}
2952 # note: tabs in the following section are not-so-helpful
2953 $pre580_summary = <<"END_SUM";
2954 I<List/search source lines:> I<Control script execution:>
2955 B<l> [I<ln>|I<sub>] List source code B<T> Stack trace
2956 B<-> or B<.> List previous/current line B<s> [I<expr>] Single step [in expr]
2957 B<w> [I<line>] List around line B<n> [I<expr>] Next, steps over subs
2958 B<f> I<filename> View source in file <B<CR>/B<Enter>> Repeat last B<n> or B<s>
2959 B</>I<pattern>B</> B<?>I<patt>B<?> Search forw/backw B<r> Return from subroutine
2960 B<v> Show versions of modules B<c> [I<ln>|I<sub>] Continue until position
2961 I<Debugger controls:> B<L> List break/watch/actions
2962 B<O> [...] Set debugger options B<t> [I<expr>] Toggle trace [trace expr]
2963 B<<>[B<<>]|B<{>[B<{>]|B<>>[B<>>] [I<cmd>] Do pre/post-prompt B<b> [I<ln>|I<event>|I<sub>] [I<cnd>] Set breakpoint
2964 B<$prc> [I<N>|I<pat>] Redo a previous command B<d> [I<ln>] or B<D> Delete a/all breakpoints
2965 B<H> [I<-num>] Display last num commands B<a> [I<ln>] I<cmd> Do cmd before line
2966 B<=> [I<a> I<val>] Define/list an alias B<W> I<expr> Add a watch expression
2967 B<h> [I<db_cmd>] Get help on command B<A> or B<W> Delete all actions/watch
2968 B<|>[B<|>]I<db_cmd> Send output to pager B<$psh>\[B<$psh>\] I<syscmd> Run cmd in a subprocess
2969 B<q> or B<^D> Quit B<R> Attempt a restart
2970 I<Data Examination:> B<expr> Execute perl code, also see: B<s>,B<n>,B<t> I<expr>
2971 B<x>|B<m> I<expr> Evals expr in list context, dumps the result or lists methods.
2972 B<p> I<expr> Print expression (uses script's current package).
2973 B<S> [[B<!>]I<pat>] List subroutine names [not] matching pattern
2974 B<V> [I<Pk> [I<Vars>]] List Variables in Package. Vars can be ~pattern or !pattern.
2975 B<X> [I<Vars>] Same as \"B<V> I<current_package> [I<Vars>]\".
2976 For more help, type B<h> I<cmd_letter>, or run B<$doccmd perldebug> for all docs.
2978 # ')}}; # Fix balance of vi % matching
2985 # Restore proper alignment destroyed by eeevil I<> and B<>
2986 # ornaments: A pox on both their houses!
2988 # A help command will have everything up to and including
2989 # the first tab sequence padded into a field 16 (or if indented 20)
2990 # wide. If it's wider than that, an extra space will be added.
2992 ^ # only matters at start of line
2993 ( \040{4} | \t )* # some subcommands are indented
2994 ( < ? # so <CR> works
2995 [BI] < [^\t\n] + ) # find an eeevil ornament
2996 ( \t+ ) # original separation, discarded
2997 ( .* ) # this will now start (no earlier) than
3000 my($leadwhite, $command, $midwhite, $text) = ($1, $2, $3, $4);
3001 my $clean = $command;
3002 $clean =~ s/[BI]<([^>]*)>/$1/g;
3003 # replace with this whole string:
3004 ($leadwhite ? " " x 4 : "")
3006 . ((" " x (16 + ($leadwhite ? 4 : 0) - length($clean))) || " ")
3011 s{ # handle bold ornaments
3012 B < ( [^>] + | > ) >
3014 $Term::ReadLine::TermCap::rl_term_set[2]
3016 . $Term::ReadLine::TermCap::rl_term_set[3]
3019 s{ # handle italic ornaments
3020 I < ( [^>] + | > ) >
3022 $Term::ReadLine::TermCap::rl_term_set[0]
3024 . $Term::ReadLine::TermCap::rl_term_set[1]
3032 return if defined $ENV{LESS} && $ENV{LESS} =~ /r/;
3033 my $is_less = $pager =~ /\bless\b/;
3034 if ($pager =~ /\bmore\b/) {
3035 my @st_more = stat('/usr/bin/more');
3036 my @st_less = stat('/usr/bin/less');
3037 $is_less = @st_more && @st_less
3038 && $st_more[0] == $st_less[0]
3039 && $st_more[1] == $st_less[1];
3041 # changes environment!
3042 $ENV{LESS} .= 'r' if $is_less;
3048 $SIG{'ABRT'} = 'DEFAULT';
3049 kill 'ABRT', $$ if $panic++;
3050 if (defined &Carp::longmess) {
3051 local $SIG{__WARN__} = '';
3052 local $Carp::CarpLevel = 2; # mydie + confess
3053 &warn(Carp::longmess("Signal @_"));
3057 print $DB::OUT "Got signal @_\n";
3065 local $SIG{__WARN__} = '';
3066 local $SIG{__DIE__} = '';
3067 eval { require Carp } if defined $^S; # If error/warning during compilation,
3068 # require may be broken.
3069 CORE::warn(@_, "\nCannot print stack trace, load with -MCarp option to see stack"),
3070 return unless defined &Carp::longmess;
3071 my ($mysingle,$mytrace) = ($single,$trace);
3072 $single = 0; $trace = 0;
3073 my $mess = Carp::longmess(@_);
3074 ($single,$trace) = ($mysingle,$mytrace);
3081 local $SIG{__DIE__} = '';
3082 local $SIG{__WARN__} = '';
3083 my $i = 0; my $ineval = 0; my $sub;
3084 if ($dieLevel > 2) {
3085 local $SIG{__WARN__} = \&dbwarn;
3086 &warn(@_); # Yell no matter what
3089 if ($dieLevel < 2) {
3090 die @_ if $^S; # in eval propagate
3092 # No need to check $^S, eval is much more robust nowadays
3093 eval { require Carp }; #if defined $^S;# If error/warning during compilation,
3094 # require may be broken.
3096 die(@_, "\nCannot print stack trace, load with -MCarp option to see stack")
3097 unless defined &Carp::longmess;
3099 # We do not want to debug this chunk (automatic disabling works
3100 # inside DB::DB, but not in Carp).
3101 my ($mysingle,$mytrace) = ($single,$trace);
3102 $single = 0; $trace = 0;
3105 package Carp; # Do not include us in the list
3107 $mess = Carp::longmess(@_);
3110 ($single,$trace) = ($mysingle,$mytrace);
3116 $prevwarn = $SIG{__WARN__} unless $warnLevel;
3119 $SIG{__WARN__} = \&DB::dbwarn;
3120 } elsif ($prevwarn) {
3121 $SIG{__WARN__} = $prevwarn;
3130 $prevdie = $SIG{__DIE__} unless $dieLevel;
3133 $SIG{__DIE__} = \&DB::dbdie; # if $dieLevel < 2;
3134 #$SIG{__DIE__} = \&DB::diehard if $dieLevel >= 2;
3135 print $OUT "Stack dump during die enabled",
3136 ( $dieLevel == 1 ? " outside of evals" : ""), ".\n"
3138 print $OUT "Dump printed too.\n" if $dieLevel > 2;
3139 } elsif ($prevdie) {
3140 $SIG{__DIE__} = $prevdie;
3141 print $OUT "Default die handler restored.\n";
3149 $prevsegv = $SIG{SEGV} unless $signalLevel;
3150 $prevbus = $SIG{BUS} unless $signalLevel;
3151 $signalLevel = shift;
3153 $SIG{SEGV} = \&DB::diesignal;
3154 $SIG{BUS} = \&DB::diesignal;
3156 $SIG{SEGV} = $prevsegv;
3157 $SIG{BUS} = $prevbus;
3165 my $name = CvGV_name_or_bust($in);
3166 defined $name ? $name : $in;
3169 sub CvGV_name_or_bust {
3171 return if $skipCvGV; # Backdoor to avoid problems if XS broken...
3172 return unless ref $in;
3173 $in = \&$in; # Hard reference...
3174 eval {require Devel::Peek; 1} or return;
3175 my $gv = Devel::Peek::CvGV($in) or return;
3176 *$gv{PACKAGE} . '::' . *$gv{NAME};
3182 return unless defined &$subr;
3183 my $name = CvGV_name_or_bust($subr);
3185 $data = $sub{$name} if defined $name;
3186 return $data if defined $data;
3189 $subr = \&$subr; # Hard reference
3192 $s = $_, last if $subr eq \&$_;
3200 $class = ref $class if ref $class;
3203 methods_via($class, '', 1);
3204 methods_via('UNIVERSAL', 'UNIVERSAL', 0);
3209 return if $packs{$class}++;
3211 my $prepend = $prefix ? "via $prefix: " : '';
3213 for $name (grep {defined &{${"${class}::"}{$_}}}
3214 sort keys %{"${class}::"}) {
3215 next if $seen{ $name }++;
3218 print $DB::OUT "$prepend$name\n";
3220 return unless shift; # Recurse?
3221 for $name (@{"${class}::ISA"}) {
3222 $prepend = $prefix ? $prefix . " -> $name" : $name;
3223 methods_via($name, $prepend, 1);
3228 $doccmd = $^O !~ /^(?:MSWin32|VMS|os2|dos|amigaos|riscos|MacOS|NetWare)\z/s
3229 ? "man" # O Happy Day!
3230 : "perldoc"; # Alas, poor unfortunates
3236 &system("$doccmd $doccmd");
3239 # this way user can override, like with $doccmd="man -Mwhatever"
3240 # or even just "man " to disable the path check.
3241 unless ($doccmd eq 'man') {
3242 &system("$doccmd $page");
3246 $page = 'perl' if lc($page) eq 'help';
3249 my $man1dir = $Config::Config{'man1dir'};
3250 my $man3dir = $Config::Config{'man3dir'};
3251 for ($man1dir, $man3dir) { s#/[^/]*\z## if /\S/ }
3253 $manpath .= "$man1dir:" if $man1dir =~ /\S/;
3254 $manpath .= "$man3dir:" if $man3dir =~ /\S/ && $man1dir ne $man3dir;
3255 chop $manpath if $manpath;
3256 # harmless if missing, I figure
3257 my $oldpath = $ENV{MANPATH};
3258 $ENV{MANPATH} = $manpath if $manpath;
3259 my $nopathopt = $^O =~ /dunno what goes here/;
3260 if (CORE::system($doccmd,
3261 # I just *know* there are men without -M
3262 (($manpath && !$nopathopt) ? ("-M", $manpath) : ()),
3265 unless ($page =~ /^perl\w/) {
3266 if (grep { $page eq $_ } qw{
3267 5004delta 5005delta amiga api apio book boot bot call compile
3268 cygwin data dbmfilter debug debguts delta diag doc dos dsc embed
3269 faq faq1 faq2 faq3 faq4 faq5 faq6 faq7 faq8 faq9 filter fork
3270 form func guts hack hist hpux intern ipc lexwarn locale lol mod
3271 modinstall modlib number obj op opentut os2 os390 pod port
3272 ref reftut run sec style sub syn thrtut tie toc todo toot tootc
3273 trap unicode var vms win32 xs xstut
3277 CORE::system($doccmd,
3278 (($manpath && !$nopathopt) ? ("-M", $manpath) : ()),
3283 if (defined $oldpath) {
3284 $ENV{MANPATH} = $manpath;
3286 delete $ENV{MANPATH};
3290 # The following BEGIN is very handy if debugger goes havoc, debugging debugger?
3292 BEGIN { # This does not compile, alas.
3293 $IN = \*STDIN; # For bugs before DB::OUT has been opened
3294 $OUT = \*STDERR; # For errors before DB::OUT has been opened
3298 $deep = 100; # warning if stack gets this deep
3302 $SIG{INT} = \&DB::catch;
3303 # This may be enabled to debug debugger:
3304 #$warnLevel = 1 unless defined $warnLevel;
3305 #$dieLevel = 1 unless defined $dieLevel;
3306 #$signalLevel = 1 unless defined $signalLevel;
3308 $db_stop = 0; # Compiler warning
3310 $level = 0; # Level of recursive debugging
3311 # @stack and $doret are needed in sub sub, which is called for DB::postponed.
3312 # Triggers bug (?) in perl is we postpone this until runtime:
3313 @postponed = @stack = (0);
3314 $stack_depth = 0; # Localized $#stack
3319 BEGIN {$^W = $ini_warn;} # Switch warnings back
3321 #use Carp; # This did break, left for debugging
3324 # Specific code for b c l V m f O, &blah, $blah, @blah, %blah
3325 my($text, $line, $start) = @_;
3326 my ($itext, $search, $prefix, $pack) =
3327 ($text, "^\Q${'package'}::\E([^:]+)\$");
3329 return sort grep /^\Q$text/, (keys %sub), qw(postpone load compile), # subroutines
3330 (map { /$search/ ? ($1) : () } keys %sub)
3331 if (substr $line, 0, $start) =~ /^\|*[blc]\s+((postpone|compile)\s+)?$/;
3332 return sort grep /^\Q$text/, values %INC # files
3333 if (substr $line, 0, $start) =~ /^\|*b\s+load\s+$/;
3334 return sort map {($_, db_complete($_ . "::", "V ", 2))}
3335 grep /^\Q$text/, map { /^(.*)::$/ ? ($1) : ()} keys %:: # top-packages
3336 if (substr $line, 0, $start) =~ /^\|*[Vm]\s+$/ and $text =~ /^\w*$/;
3337 return sort map {($_, db_complete($_ . "::", "V ", 2))}
3339 grep /^\Q$text/, map { /^(.*)::$/ ? ($prefix . "::$1") : ()} keys %{$prefix . '::'}
3341 if (substr $line, 0, $start) =~ /^\|*[Vm]\s+$/
3342 and $text =~ /^(.*[^:])::?(\w*)$/ and $prefix = $1;
3343 if ( $line =~ /^\|*f\s+(.*)/ ) { # Loaded files
3344 # We may want to complete to (eval 9), so $text may be wrong
3345 $prefix = length($1) - length($text);
3348 map {substr $_, 2 + $prefix} grep /^_<\Q$text/, (keys %main::), $0
3350 if ((substr $text, 0, 1) eq '&') { # subroutines
3351 $text = substr $text, 1;
3353 return sort map "$prefix$_",
3356 (map { /$search/ ? ($1) : () }
3359 if ($text =~ /^[\$@%](.*)::(.*)/) { # symbols in a package
3360 $pack = ($1 eq 'main' ? '' : $1) . '::';
3361 $prefix = (substr $text, 0, 1) . $1 . '::';
3364 = map "$prefix$_", grep /^\Q$text/, grep /^_?[a-zA-Z]/, keys %$pack ;
3365 if (@out == 1 and $out[0] =~ /::$/ and $out[0] ne $itext) {
3366 return db_complete($out[0], $line, $start);
3370 if ($text =~ /^[\$@%]/) { # symbols (in $package + packages in main)
3371 $pack = ($package eq 'main' ? '' : $package) . '::';
3372 $prefix = substr $text, 0, 1;
3373 $text = substr $text, 1;
3374 my @out = map "$prefix$_", grep /^\Q$text/,
3375 (grep /^_?[a-zA-Z]/, keys %$pack),
3376 ( $pack eq '::' ? () : (grep /::$/, keys %::) ) ;
3377 if (@out == 1 and $out[0] =~ /::$/ and $out[0] ne $itext) {
3378 return db_complete($out[0], $line, $start);
3382 if ((substr $line, 0, $start) =~ /^\|*O\b.*\s$/) { # Options after a space
3383 my @out = grep /^\Q$text/, @options;
3384 my $val = option_val($out[0], undef);
3386 if (not defined $val or $val =~ /[\n\r]/) {
3387 # Can do nothing better
3388 } elsif ($val =~ /\s/) {
3390 foreach $l (split //, qq/\"\'\#\|/) {
3391 $out = "$l$val$l ", last if (index $val, $l) == -1;
3396 # Default to value if one completion, to question if many
3397 $rl_attribs->{completer_terminator_character} = (@out == 1 ? $out : '? ');
3400 return $term->filename_list($text); # filenames
3405 print $OUT "Use `q' to quit or `R' to restart. `h q' for details.\n"
3409 if (defined($ini_pids)) {
3410 $ENV{PERLDB_PIDS} = $ini_pids;
3412 delete($ENV{PERLDB_PIDS});
3417 $finished = 1 if $inhibit_exit; # So that some keys may be disabled.
3418 $fall_off_end = 1 unless $inhibit_exit;
3419 # Do not stop in at_exit() and destructors on exit:
3420 $DB::single = !$fall_off_end && !$runnonstop;
3421 DB::fake::at_exit() unless $fall_off_end or $runnonstop;
3425 # ===================================== pre580 ================================
3426 # this is very sad below here...
3429 sub cmd_pre580_null {
3435 if ($cmd =~ /^(\d*)\s*(.*)/) {
3436 $i = $1 || $line; $j = $2;
3438 if ($dbline[$i] == 0) {
3439 print $OUT "Line $i may not have an action.\n";
3441 $had_breakpoints{$filename} |= 2;
3442 $dbline{$i} =~ s/\0[^\0]*//;
3443 $dbline{$i} .= "\0" . action($j);
3446 $dbline{$i} =~ s/\0[^\0]*//;
3447 delete $dbline{$i} if $dbline{$i} eq '';
3455 if ($cmd =~ /^load\b\s*(.*)/) {
3456 my $file = $1; $file =~ s/\s+$//;
3458 } elsif ($cmd =~ /^(postpone|compile)\b\s*([':A-Za-z_][':\w]*)\s*(.*)/) {
3459 my $cond = length $3 ? $3 : '1';
3460 my ($subname, $break) = ($2, $1 eq 'postpone');
3461 $subname =~ s/\'/::/g;
3462 $subname = "${'package'}::" . $subname
3463 unless $subname =~ /::/;
3464 $subname = "main".$subname if substr($subname,0,2) eq "::";
3465 $postponed{$subname} = $break ? "break +0 if $cond" : "compile";
3466 } elsif ($cmd =~ /^([':A-Za-z_][':\w]*(?:\[.*\])?)\s*(.*)/) {
3468 my $cond = length $2 ? $2 : '1';
3469 &cmd_b_sub($subname, $cond);
3470 } elsif ($cmd =~ /^(\d*)\s*(.*)/) {
3471 my $i = $1 || $dbline;
3472 my $cond = length $2 ? $2 : '1';
3473 &cmd_b_line($i, $cond);
3479 if ($cmd =~ /^\s*$/) {
3480 print $OUT "Deleting all breakpoints...\n";
3482 for $file (keys %had_breakpoints) {
3483 local *dbline = $main::{'_<' . $file};
3487 for ($i = 1; $i <= $max ; $i++) {
3488 if (defined $dbline{$i}) {
3489 $dbline{$i} =~ s/^[^\0]+//;
3490 if ($dbline{$i} =~ s/^\0?$//) {
3496 if (not $had_breakpoints{$file} &= ~1) {
3497 delete $had_breakpoints{$file};
3501 undef %postponed_file;
3502 undef %break_on_load;
3508 if ($cmd =~ /^\s*$/) {
3509 print_help($pre580_help);
3510 } elsif ($cmd =~ /^h\s*/) {
3511 print_help($pre580_summary);
3512 } elsif ($cmd =~ /^h\s+(\S.*)$/) {
3513 my $asked = $1; # for proper errmsg
3514 my $qasked = quotemeta($asked); # for searching
3515 # XXX: finds CR but not <CR>
3516 if ($pre580_help =~ /^<?(?:[IB]<)$qasked/m) {
3517 while ($pre580_help =~ /^(<?(?:[IB]<)$qasked([\s\S]*?)\n)(?!\s)/mg) {
3521 print_help("B<$asked> is not a debugger command.\n");
3530 @to_watch = @old_watch = ();
3531 } elsif ($cmd =~ /^(.*)/s) {
3535 $val = (defined $val) ? "'$val'" : 'undef' ;
3536 push @old_watch, $val;
3544 "Debugged program terminated. Use `q' to quit or `R' to restart.";
3547 package DB; # Do not trace this 1; below!